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Diffstat (limited to 'src/client/Client.cc')
| -rw-r--r-- | src/client/Client.cc | 16517 |
1 files changed, 16517 insertions, 0 deletions
diff --git a/src/client/Client.cc b/src/client/Client.cc new file mode 100644 index 000000000..2b7db5a89 --- /dev/null +++ b/src/client/Client.cc @@ -0,0 +1,16517 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + + +// unix-ey fs stuff +#include <unistd.h> +#include <sys/types.h> +#include <time.h> +#include <utime.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/param.h> +#include <fcntl.h> +#include <sys/file.h> +#ifndef _WIN32 +#include <sys/utsname.h> +#endif +#include <sys/uio.h> + +#include <boost/lexical_cast.hpp> +#include <boost/fusion/include/std_pair.hpp> + +#include "common/async/waiter.h" + +#if defined(__FreeBSD__) +#define XATTR_CREATE 0x1 +#define XATTR_REPLACE 0x2 +#elif !defined(_WIN32) +#include <sys/xattr.h> +#endif + +#if defined(__linux__) +#include <linux/falloc.h> +#endif + +#include <sys/statvfs.h> + +#include "common/config.h" +#include "common/version.h" +#include "common/async/blocked_completion.h" + +#include "mon/MonClient.h" + +#include "messages/MClientCaps.h" +#include "messages/MClientLease.h" +#include "messages/MClientQuota.h" +#include "messages/MClientReclaim.h" +#include "messages/MClientReclaimReply.h" +#include "messages/MClientReconnect.h" +#include "messages/MClientReply.h" +#include "messages/MClientRequest.h" +#include "messages/MClientRequestForward.h" +#include "messages/MClientSession.h" +#include "messages/MClientSnap.h" +#include "messages/MClientMetrics.h" +#include "messages/MCommandReply.h" +#include "messages/MFSMap.h" +#include "messages/MFSMapUser.h" +#include "messages/MMDSMap.h" +#include "messages/MOSDMap.h" + +#include "mds/flock.h" +#include "mds/cephfs_features.h" +#include "mds/snap.h" +#include "osd/OSDMap.h" +#include "osdc/Filer.h" + +#include "common/Cond.h" +#include "common/perf_counters.h" +#include "common/admin_socket.h" +#include "common/errno.h" +#include "include/str_list.h" + +#define dout_subsys ceph_subsys_client + +#include "include/lru.h" +#include "include/compat.h" +#include "include/stringify.h" +#include "include/random.h" + +#include "Client.h" +#include "Inode.h" +#include "Dentry.h" +#include "Delegation.h" +#include "Dir.h" +#include "ClientSnapRealm.h" +#include "Fh.h" +#include "MetaSession.h" +#include "MetaRequest.h" +#include "ObjecterWriteback.h" +#include "posix_acl.h" + +#include "include/ceph_assert.h" +#include "include/stat.h" + +#include "include/cephfs/ceph_ll_client.h" + +#if HAVE_GETGROUPLIST +#include <grp.h> +#include <pwd.h> +#include <unistd.h> +#endif + +#undef dout_prefix +#define dout_prefix *_dout << "client." << whoami << " " + +#define tout(cct) if (!cct->_conf->client_trace.empty()) traceout + +// FreeBSD fails to define this +#ifndef O_DSYNC +#define O_DSYNC 0x0 +#endif +// Darwin fails to define this +#ifndef O_RSYNC +#define O_RSYNC 0x0 +#endif + +#ifndef O_DIRECT +#define O_DIRECT 0x0 +#endif + +// Windows doesn't define those values. While the Posix compatibilty layer +// doesn't support those values, the Windows native functions do provide +// similar flags. Special care should be taken if we're going to use those +// flags in ceph-dokan. The current values are no-ops, while propagating +// them to the rest of the code might cause the Windows functions to reject +// them as invalid. +#ifndef O_NOFOLLOW +#define O_NOFOLLOW 0x0 +#endif + +#ifndef O_SYNC +#define O_SYNC 0x0 +#endif + +#define DEBUG_GETATTR_CAPS (CEPH_CAP_XATTR_SHARED) + +#ifndef S_IXUGO +#define S_IXUGO (S_IXUSR|S_IXGRP|S_IXOTH) +#endif + +using std::dec; +using std::hex; +using std::list; +using std::oct; +using std::pair; +using std::string; +using std::vector; + +using namespace TOPNSPC::common; + +namespace bs = boost::system; +namespace ca = ceph::async; + +void client_flush_set_callback(void *p, ObjectCacher::ObjectSet *oset) +{ + Client *client = static_cast<Client*>(p); + client->flush_set_callback(oset); +} + +bool Client::is_reserved_vino(vinodeno_t &vino) { + if (MDS_IS_PRIVATE_INO(vino.ino)) { + ldout(cct, -1) << __func__ << " attempt to access reserved inode number " << vino << dendl; + return true; + } + return false; +} + +// running average and standard deviation -- presented in +// Donald Knuth's TAoCP, Volume II. +double calc_average(double old_avg, double value, uint64_t count) { + double new_avg; + if (count == 1) { + new_avg = value; + } else { + new_avg = old_avg + ((value - old_avg) / count); + } + + return new_avg; +} + +double calc_sq_sum(double old_sq_sum, double old_mean, double new_mean, + double value, uint64_t count) { + double new_sq_sum; + if (count == 1) { + new_sq_sum = 0.0; + } else { + new_sq_sum = old_sq_sum + (value - old_mean)*(value - new_mean); + } + + return new_sq_sum; +} + +// ------------- + +Client::CommandHook::CommandHook(Client *client) : + m_client(client) +{ +} + +int Client::CommandHook::call( + std::string_view command, + const cmdmap_t& cmdmap, + const bufferlist&, + Formatter *f, + std::ostream& errss, + bufferlist& out) +{ + f->open_object_section("result"); + { + std::scoped_lock l{m_client->client_lock}; + if (command == "mds_requests") + m_client->dump_mds_requests(f); + else if (command == "mds_sessions") { + bool cap_dump = false; + cmd_getval(cmdmap, "cap_dump", cap_dump); + m_client->dump_mds_sessions(f, cap_dump); + } else if (command == "dump_cache") + m_client->dump_cache(f); + else if (command == "kick_stale_sessions") + m_client->_kick_stale_sessions(); + else if (command == "status") + m_client->dump_status(f); + else + ceph_abort_msg("bad command registered"); + } + f->close_section(); + return 0; +} + + +// ------------- + +int Client::get_fd_inode(int fd, InodeRef *in) { + int r = 0; + if (fd == CEPHFS_AT_FDCWD) { + *in = cwd; + } else { + Fh *f = get_filehandle(fd); + if (!f) { + r = -CEPHFS_EBADF; + } else { + *in = f->inode; + } + } + return r; +} + +dir_result_t::dir_result_t(Inode *in, const UserPerm& perms) + : inode(in), offset(0), next_offset(2), + release_count(0), ordered_count(0), cache_index(0), start_shared_gen(0), + perms(perms) + { } + +void Client::_reset_faked_inos() +{ + ino_t start = 1024; + free_faked_inos.clear(); + free_faked_inos.insert(start, (uint32_t)-1 - start + 1); + last_used_faked_ino = 0; + last_used_faked_root = 0; + #ifdef _WIN32 + // On Windows, sizeof(ino_t) is just 2. Despite that, most "native" + // Windows structures, including Dokan ones, are using 64B identifiers. + _use_faked_inos = false; + #else + _use_faked_inos = sizeof(ino_t) < 8 || cct->_conf->client_use_faked_inos; + #endif +} + +void Client::_assign_faked_ino(Inode *in) +{ + if (0 == last_used_faked_ino) + last_used_faked_ino = last_used_faked_ino + 2048; // start(1024)~2048 reserved for _assign_faked_root + interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_ino + 1); + if (it == free_faked_inos.end() && last_used_faked_ino > 0) { + last_used_faked_ino = 2048; + it = free_faked_inos.lower_bound(last_used_faked_ino + 1); + } + ceph_assert(it != free_faked_inos.end()); + if (last_used_faked_ino < it.get_start()) { + ceph_assert(it.get_len() > 0); + last_used_faked_ino = it.get_start(); + } else { + ++last_used_faked_ino; + ceph_assert(it.get_start() + it.get_len() > last_used_faked_ino); + } + in->faked_ino = last_used_faked_ino; + free_faked_inos.erase(in->faked_ino); + faked_ino_map[in->faked_ino] = in->vino(); +} + +/* + * In the faked mode, if you export multiple subdirectories, + * you will see that the inode numbers of the exported subdirectories + * are the same. so we distinguish the mount point by reserving + * the "fake ids" between "1024~2048" and combining the last + * 10bits(0x3ff) of the "root inodes". +*/ +void Client::_assign_faked_root(Inode *in) +{ + interval_set<ino_t>::const_iterator it = free_faked_inos.lower_bound(last_used_faked_root + 1); + if (it == free_faked_inos.end() && last_used_faked_root > 0) { + last_used_faked_root = 0; + it = free_faked_inos.lower_bound(last_used_faked_root + 1); + } + ceph_assert(it != free_faked_inos.end()); + vinodeno_t inode_info = in->vino(); + uint64_t inode_num = (uint64_t)inode_info.ino; + ldout(cct, 10) << "inode_num " << inode_num << "inode_num & 0x3ff=" << (inode_num & 0x3ff)<< dendl; + last_used_faked_root = it.get_start() + (inode_num & 0x3ff); // 0x3ff mask and get_start will not exceed 2048 + ceph_assert(it.get_start() + it.get_len() > last_used_faked_root); + + in->faked_ino = last_used_faked_root; + free_faked_inos.erase(in->faked_ino); + faked_ino_map[in->faked_ino] = in->vino(); +} + +void Client::_release_faked_ino(Inode *in) +{ + free_faked_inos.insert(in->faked_ino); + faked_ino_map.erase(in->faked_ino); +} + +vinodeno_t Client::_map_faked_ino(ino_t ino) +{ + vinodeno_t vino; + if (ino == 1) + vino = root->vino(); + else if (faked_ino_map.count(ino)) + vino = faked_ino_map[ino]; + else + vino = vinodeno_t(0, CEPH_NOSNAP); + ldout(cct, 10) << __func__ << " " << ino << " -> " << vino << dendl; + return vino; +} + +vinodeno_t Client::map_faked_ino(ino_t ino) +{ + std::scoped_lock lock(client_lock); + return _map_faked_ino(ino); +} + +// cons/des + +Client::Client(Messenger *m, MonClient *mc, Objecter *objecter_) + : Dispatcher(m->cct->get()), + timer(m->cct, timer_lock, false), + messenger(m), + monclient(mc), + objecter(objecter_), + whoami(mc->get_global_id()), + mount_state(CLIENT_UNMOUNTED, "Client::mountstate_lock"), + initialize_state(CLIENT_NEW, "Client::initstate_lock"), + cct_deleter{m->cct, [](CephContext *p) {p->put();}}, + async_ino_invalidator(m->cct), + async_dentry_invalidator(m->cct), + interrupt_finisher(m->cct), + remount_finisher(m->cct), + async_ino_releasor(m->cct), + objecter_finisher(m->cct), + m_command_hook(this), + fscid(0) +{ + _reset_faked_inos(); + + user_id = cct->_conf->client_mount_uid; + group_id = cct->_conf->client_mount_gid; + fuse_default_permissions = cct->_conf.get_val<bool>( + "fuse_default_permissions"); + + _collect_and_send_global_metrics = cct->_conf.get_val<bool>( + "client_collect_and_send_global_metrics"); + + mount_timeout = cct->_conf.get_val<std::chrono::seconds>( + "client_mount_timeout"); + + caps_release_delay = cct->_conf.get_val<std::chrono::seconds>( + "client_caps_release_delay"); + + if (cct->_conf->client_acl_type == "posix_acl") + acl_type = POSIX_ACL; + + lru.lru_set_midpoint(cct->_conf->client_cache_mid); + + // file handles + free_fd_set.insert(10, 1<<30); + + mdsmap.reset(new MDSMap); + + // osd interfaces + writeback_handler.reset(new ObjecterWriteback(objecter, &objecter_finisher, + &client_lock)); + objectcacher.reset(new ObjectCacher(cct, "libcephfs", *writeback_handler, client_lock, + client_flush_set_callback, // all commit callback + (void*)this, + cct->_conf->client_oc_size, + cct->_conf->client_oc_max_objects, + cct->_conf->client_oc_max_dirty, + cct->_conf->client_oc_target_dirty, + cct->_conf->client_oc_max_dirty_age, + true)); +} + + +Client::~Client() +{ + ceph_assert(ceph_mutex_is_not_locked(client_lock)); + + // If the task is crashed or aborted and doesn't + // get any chance to run the umount and shutdow. + { + std::scoped_lock l{client_lock}; + tick_thread_stopped = true; + upkeep_cond.notify_one(); + } + + if (upkeeper.joinable()) + upkeeper.join(); + + // It is necessary to hold client_lock, because any inode destruction + // may call into ObjectCacher, which asserts that it's lock (which is + // client_lock) is held. + std::scoped_lock l{client_lock}; + tear_down_cache(); +} + +void Client::tear_down_cache() +{ + // fd's + for (auto &[fd, fh] : fd_map) { + ldout(cct, 1) << __func__ << " forcing close of fh " << fd << " ino " << fh->inode->ino << dendl; + _release_fh(fh); + } + fd_map.clear(); + + while (!opened_dirs.empty()) { + dir_result_t *dirp = *opened_dirs.begin(); + ldout(cct, 1) << __func__ << " forcing close of dir " << dirp << " ino " << dirp->inode->ino << dendl; + _closedir(dirp); + } + + // caps! + // *** FIXME *** + + // empty lru + trim_cache(); + ceph_assert(lru.lru_get_size() == 0); + + // close root ino + ceph_assert(inode_map.size() <= 1 + root_parents.size()); + if (root && inode_map.size() == 1 + root_parents.size()) { + root.reset(); + } + + ceph_assert(inode_map.empty()); +} + +inodeno_t Client::get_root_ino() +{ + std::scoped_lock l(client_lock); + if (use_faked_inos()) + return root->faked_ino; + else + return root->ino; +} + +Inode *Client::get_root() +{ + std::scoped_lock l(client_lock); + root->ll_get(); + return root.get(); +} + + +// debug crapola + +void Client::dump_inode(Formatter *f, Inode *in, set<Inode*>& did, bool disconnected) +{ + filepath path; + in->make_long_path(path); + ldout(cct, 1) << "dump_inode: " + << (disconnected ? "DISCONNECTED ":"") + << "inode " << in->ino + << " " << path + << " ref " << in->get_nref() + << " " << *in << dendl; + + if (f) { + f->open_object_section("inode"); + f->dump_stream("path") << path; + if (disconnected) + f->dump_int("disconnected", 1); + in->dump(f); + f->close_section(); + } + + did.insert(in); + if (in->dir) { + ldout(cct, 1) << " dir " << in->dir << " size " << in->dir->dentries.size() << dendl; + for (ceph::unordered_map<string, Dentry*>::iterator it = in->dir->dentries.begin(); + it != in->dir->dentries.end(); + ++it) { + ldout(cct, 1) << " " << in->ino << " dn " << it->first << " " << it->second << " ref " << it->second->ref << dendl; + if (f) { + f->open_object_section("dentry"); + it->second->dump(f); + f->close_section(); + } + if (it->second->inode) + dump_inode(f, it->second->inode.get(), did, false); + } + } +} + +void Client::dump_cache(Formatter *f) +{ + set<Inode*> did; + + ldout(cct, 1) << __func__ << dendl; + + if (f) + f->open_array_section("cache"); + + if (root) + dump_inode(f, root.get(), did, true); + + // make a second pass to catch anything disconnected + for (ceph::unordered_map<vinodeno_t, Inode*>::iterator it = inode_map.begin(); + it != inode_map.end(); + ++it) { + if (did.count(it->second)) + continue; + dump_inode(f, it->second, did, true); + } + + if (f) + f->close_section(); +} + +void Client::dump_status(Formatter *f) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + ldout(cct, 1) << __func__ << dendl; + + const epoch_t osd_epoch + = objecter->with_osdmap(std::mem_fn(&OSDMap::get_epoch)); + + if (f) { + f->open_object_section("metadata"); + for (const auto& kv : metadata) + f->dump_string(kv.first.c_str(), kv.second); + f->close_section(); + + f->dump_int("dentry_count", lru.lru_get_size()); + f->dump_int("dentry_pinned_count", lru.lru_get_num_pinned()); + f->dump_int("id", get_nodeid().v); + entity_inst_t inst(messenger->get_myname(), messenger->get_myaddr_legacy()); + f->dump_object("inst", inst); + f->dump_object("addr", inst.addr); + f->dump_stream("inst_str") << inst.name << " " << inst.addr.get_legacy_str(); + f->dump_string("addr_str", inst.addr.get_legacy_str()); + f->dump_int("inode_count", inode_map.size()); + f->dump_int("mds_epoch", mdsmap->get_epoch()); + f->dump_int("osd_epoch", osd_epoch); + f->dump_int("osd_epoch_barrier", cap_epoch_barrier); + f->dump_bool("blocklisted", blocklisted); + f->dump_string("fs_name", mdsmap->get_fs_name()); + } +} + +void Client::_pre_init() +{ + timer.init(); + + objecter_finisher.start(); + filer.reset(new Filer(objecter, &objecter_finisher)); + + objectcacher->start(); +} + +int Client::init() +{ + RWRef_t iref_writer(initialize_state, CLIENT_INITIALIZING, false); + ceph_assert(iref_writer.is_first_writer()); + + _pre_init(); + { + std::scoped_lock l{client_lock}; + messenger->add_dispatcher_tail(this); + } + _finish_init(); + iref_writer.update_state(CLIENT_INITIALIZED); + return 0; +} + +void Client::_finish_init() +{ + { + std::scoped_lock l{client_lock}; + // logger + PerfCountersBuilder plb(cct, "client", l_c_first, l_c_last); + plb.add_time_avg(l_c_reply, "reply", "Latency of receiving a reply on metadata request"); + plb.add_time_avg(l_c_lat, "lat", "Latency of processing a metadata request"); + plb.add_time_avg(l_c_wrlat, "wrlat", "Latency of a file data write operation"); + plb.add_time_avg(l_c_read, "rdlat", "Latency of a file data read operation"); + plb.add_time_avg(l_c_fsync, "fsync", "Latency of a file sync operation"); + // average, standard deviation mds/r/w/ latencies + plb.add_time(l_c_md_avg, "mdavg", "Average latency for processing metadata requests"); + plb.add_u64(l_c_md_sqsum, "mdsqsum", "Sum of squares (to calculate variability/stdev) for metadata requests"); + plb.add_u64(l_c_md_ops, "mdops", "Total metadata IO operations"); + plb.add_time(l_c_rd_avg, "readavg", "Average latency for processing read requests"); + plb.add_u64(l_c_rd_sqsum, "readsqsum", "Sum of squares ((to calculate variability/stdev) for read requests"); + plb.add_u64(l_c_rd_ops, "rdops", "Total read IO operations"); + plb.add_time(l_c_wr_avg, "writeavg", "Average latency for processing write requests"); + plb.add_u64(l_c_wr_sqsum, "writesqsum", "Sum of squares ((to calculate variability/stdev) for write requests"); + plb.add_u64(l_c_wr_ops, "rdops", "Total write IO operations"); + logger.reset(plb.create_perf_counters()); + cct->get_perfcounters_collection()->add(logger.get()); + } + + cct->_conf.add_observer(this); + + AdminSocket* admin_socket = cct->get_admin_socket(); + int ret = admin_socket->register_command("mds_requests", + &m_command_hook, + "show in-progress mds requests"); + if (ret < 0) { + lderr(cct) << "error registering admin socket command: " + << cpp_strerror(-ret) << dendl; + } + ret = admin_socket->register_command("mds_sessions " + "name=cap_dump,type=CephBool,req=false", + &m_command_hook, + "show mds session state"); + if (ret < 0) { + lderr(cct) << "error registering admin socket command: " + << cpp_strerror(-ret) << dendl; + } + ret = admin_socket->register_command("dump_cache", + &m_command_hook, + "show in-memory metadata cache contents"); + if (ret < 0) { + lderr(cct) << "error registering admin socket command: " + << cpp_strerror(-ret) << dendl; + } + ret = admin_socket->register_command("kick_stale_sessions", + &m_command_hook, + "kick sessions that were remote reset"); + if (ret < 0) { + lderr(cct) << "error registering admin socket command: " + << cpp_strerror(-ret) << dendl; + } + ret = admin_socket->register_command("status", + &m_command_hook, + "show overall client status"); + if (ret < 0) { + lderr(cct) << "error registering admin socket command: " + << cpp_strerror(-ret) << dendl; + } +} + +void Client::shutdown() +{ + ldout(cct, 1) << __func__ << dendl; + + // If we were not mounted, but were being used for sending + // MDS commands, we may have sessions that need closing. + { + std::scoped_lock l{client_lock}; + + // To make sure the tick thread will be stoppped before + // destructing the Client, just in case like the _mount() + // failed but didn't not get a chance to stop the tick + // thread + tick_thread_stopped = true; + upkeep_cond.notify_one(); + + _close_sessions(); + } + cct->_conf.remove_observer(this); + + cct->get_admin_socket()->unregister_commands(&m_command_hook); + + if (ino_invalidate_cb) { + ldout(cct, 10) << "shutdown stopping cache invalidator finisher" << dendl; + async_ino_invalidator.wait_for_empty(); + async_ino_invalidator.stop(); + } + + if (dentry_invalidate_cb) { + ldout(cct, 10) << "shutdown stopping dentry invalidator finisher" << dendl; + async_dentry_invalidator.wait_for_empty(); + async_dentry_invalidator.stop(); + } + + if (switch_interrupt_cb) { + ldout(cct, 10) << "shutdown stopping interrupt finisher" << dendl; + interrupt_finisher.wait_for_empty(); + interrupt_finisher.stop(); + } + + if (remount_cb) { + ldout(cct, 10) << "shutdown stopping remount finisher" << dendl; + remount_finisher.wait_for_empty(); + remount_finisher.stop(); + } + + if (ino_release_cb) { + ldout(cct, 10) << "shutdown stopping inode release finisher" << dendl; + async_ino_releasor.wait_for_empty(); + async_ino_releasor.stop(); + } + + objectcacher->stop(); // outside of client_lock! this does a join. + + /* + * We are shuting down the client. + * + * Just declare the state to CLIENT_NEW to block and fail any + * new comming "reader" and then try to wait all the in-flight + * "readers" to finish. + */ + RWRef_t iref_writer(initialize_state, CLIENT_NEW, false); + if (!iref_writer.is_first_writer()) + return; + iref_writer.wait_readers_done(); + + { + std::scoped_lock l(timer_lock); + timer.shutdown(); + } + + objecter_finisher.wait_for_empty(); + objecter_finisher.stop(); + + if (logger) { + cct->get_perfcounters_collection()->remove(logger.get()); + logger.reset(); + } +} + +void Client::update_io_stat_metadata(utime_t latency) { + auto lat_nsec = latency.to_nsec(); + // old values are used to compute new ones + auto o_avg = logger->tget(l_c_md_avg).to_nsec(); + auto o_sqsum = logger->get(l_c_md_sqsum); + + auto n_avg = calc_average(o_avg, lat_nsec, nr_metadata_request); + auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec, + nr_metadata_request); + + logger->tinc(l_c_lat, latency); + logger->tinc(l_c_reply, latency); + + utime_t avg; + avg.set_from_double(n_avg / 1000000000); + logger->tset(l_c_md_avg, avg); + logger->set(l_c_md_sqsum, n_sqsum); + logger->set(l_c_md_ops, nr_metadata_request); +} + +void Client::update_io_stat_read(utime_t latency) { + auto lat_nsec = latency.to_nsec(); + // old values are used to compute new ones + auto o_avg = logger->tget(l_c_rd_avg).to_nsec(); + auto o_sqsum = logger->get(l_c_rd_sqsum); + + auto n_avg = calc_average(o_avg, lat_nsec, nr_read_request); + auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec, + nr_read_request); + + logger->tinc(l_c_read, latency); + + utime_t avg; + avg.set_from_double(n_avg / 1000000000); + logger->tset(l_c_rd_avg, avg); + logger->set(l_c_rd_sqsum, n_sqsum); + logger->set(l_c_rd_ops, nr_read_request); +} + +void Client::update_io_stat_write(utime_t latency) { + auto lat_nsec = latency.to_nsec(); + // old values are used to compute new ones + auto o_avg = logger->tget(l_c_wr_avg).to_nsec(); + auto o_sqsum = logger->get(l_c_wr_sqsum); + + auto n_avg = calc_average(o_avg, lat_nsec, nr_write_request); + auto n_sqsum = calc_sq_sum(o_sqsum, o_avg, n_avg, lat_nsec, + nr_write_request); + + logger->tinc(l_c_wrlat, latency); + + utime_t avg; + avg.set_from_double(n_avg / 1000000000); + logger->tset(l_c_wr_avg, avg); + logger->set(l_c_wr_sqsum, n_sqsum); + logger->set(l_c_wr_ops, nr_write_request); +} + +// =================== +// metadata cache stuff + +void Client::trim_cache(bool trim_kernel_dcache) +{ + uint64_t max = cct->_conf->client_cache_size; + ldout(cct, 20) << "trim_cache size " << lru.lru_get_size() << " max " << max << dendl; + unsigned last = 0; + while (lru.lru_get_size() != last) { + last = lru.lru_get_size(); + + if (!is_unmounting() && lru.lru_get_size() <= max) break; + + // trim! + Dentry *dn = static_cast<Dentry*>(lru.lru_get_next_expire()); + if (!dn) + break; // done + + trim_dentry(dn); + } + + if (trim_kernel_dcache && lru.lru_get_size() > max) + _invalidate_kernel_dcache(); + + // hose root? + if (lru.lru_get_size() == 0 && root && root->get_nref() == 1 && inode_map.size() == 1 + root_parents.size()) { + ldout(cct, 15) << "trim_cache trimmed root " << root << dendl; + root.reset(); + } +} + +void Client::trim_cache_for_reconnect(MetaSession *s) +{ + mds_rank_t mds = s->mds_num; + ldout(cct, 20) << __func__ << " mds." << mds << dendl; + + int trimmed = 0; + list<Dentry*> skipped; + while (lru.lru_get_size() > 0) { + Dentry *dn = static_cast<Dentry*>(lru.lru_expire()); + if (!dn) + break; + + if ((dn->inode && dn->inode->caps.count(mds)) || + dn->dir->parent_inode->caps.count(mds)) { + trim_dentry(dn); + trimmed++; + } else + skipped.push_back(dn); + } + + for(list<Dentry*>::iterator p = skipped.begin(); p != skipped.end(); ++p) + lru.lru_insert_mid(*p); + + ldout(cct, 20) << __func__ << " mds." << mds + << " trimmed " << trimmed << " dentries" << dendl; + + if (s->caps.size() > 0) + _invalidate_kernel_dcache(); +} + +void Client::trim_dentry(Dentry *dn) +{ + ldout(cct, 15) << "trim_dentry unlinking dn " << dn->name + << " in dir " + << std::hex << dn->dir->parent_inode->ino << std::dec + << dendl; + if (dn->inode) { + Inode *diri = dn->dir->parent_inode; + clear_dir_complete_and_ordered(diri, true); + } + unlink(dn, false, false); // drop dir, drop dentry +} + + +void Client::update_inode_file_size(Inode *in, int issued, uint64_t size, + uint64_t truncate_seq, uint64_t truncate_size) +{ + uint64_t prior_size = in->size; + + if (truncate_seq > in->truncate_seq || + (truncate_seq == in->truncate_seq && size > in->size)) { + ldout(cct, 10) << "size " << in->size << " -> " << size << dendl; + in->size = size; + in->reported_size = size; + if (truncate_seq != in->truncate_seq) { + ldout(cct, 10) << "truncate_seq " << in->truncate_seq << " -> " + << truncate_seq << dendl; + in->truncate_seq = truncate_seq; + in->oset.truncate_seq = truncate_seq; + + // truncate cached file data + if (prior_size > size) { + _invalidate_inode_cache(in, size, prior_size - size); + } + } + + // truncate inline data + if (in->inline_version < CEPH_INLINE_NONE) { + uint32_t len = in->inline_data.length(); + if (size < len) + in->inline_data.splice(size, len - size); + } + } + if (truncate_seq >= in->truncate_seq && + in->truncate_size != truncate_size) { + if (in->is_file()) { + ldout(cct, 10) << "truncate_size " << in->truncate_size << " -> " + << truncate_size << dendl; + in->truncate_size = truncate_size; + in->oset.truncate_size = truncate_size; + } else { + ldout(cct, 0) << "Hmmm, truncate_seq && truncate_size changed on non-file inode!" << dendl; + } + } +} + +void Client::update_inode_file_time(Inode *in, int issued, uint64_t time_warp_seq, + utime_t ctime, utime_t mtime, utime_t atime) +{ + ldout(cct, 10) << __func__ << " " << *in << " " << ccap_string(issued) + << " ctime " << ctime << " mtime " << mtime << dendl; + + if (time_warp_seq > in->time_warp_seq) + ldout(cct, 10) << " mds time_warp_seq " << time_warp_seq + << " is higher than local time_warp_seq " + << in->time_warp_seq << dendl; + + int warn = false; + // be careful with size, mtime, atime + if (issued & (CEPH_CAP_FILE_EXCL| + CEPH_CAP_FILE_WR| + CEPH_CAP_FILE_BUFFER| + CEPH_CAP_AUTH_EXCL| + CEPH_CAP_XATTR_EXCL)) { + ldout(cct, 30) << "Yay have enough caps to look at our times" << dendl; + if (ctime > in->ctime) + in->ctime = ctime; + if (time_warp_seq > in->time_warp_seq) { + //the mds updated times, so take those! + in->mtime = mtime; + in->atime = atime; + in->time_warp_seq = time_warp_seq; + } else if (time_warp_seq == in->time_warp_seq) { + //take max times + if (mtime > in->mtime) + in->mtime = mtime; + if (atime > in->atime) + in->atime = atime; + } else if (issued & CEPH_CAP_FILE_EXCL) { + //ignore mds values as we have a higher seq + } else warn = true; + } else { + ldout(cct, 30) << "Don't have enough caps, just taking mds' time values" << dendl; + if (time_warp_seq >= in->time_warp_seq) { + in->ctime = ctime; + in->mtime = mtime; + in->atime = atime; + in->time_warp_seq = time_warp_seq; + } else warn = true; + } + if (warn) { + ldout(cct, 0) << "WARNING: " << *in << " mds time_warp_seq " + << time_warp_seq << " is lower than local time_warp_seq " + << in->time_warp_seq + << dendl; + } +} + +void Client::_fragmap_remove_non_leaves(Inode *in) +{ + for (map<frag_t,int>::iterator p = in->fragmap.begin(); p != in->fragmap.end(); ) + if (!in->dirfragtree.is_leaf(p->first)) + in->fragmap.erase(p++); + else + ++p; +} + +void Client::_fragmap_remove_stopped_mds(Inode *in, mds_rank_t mds) +{ + for (auto p = in->fragmap.begin(); p != in->fragmap.end(); ) + if (p->second == mds) + in->fragmap.erase(p++); + else + ++p; +} + +Inode * Client::add_update_inode(InodeStat *st, utime_t from, + MetaSession *session, + const UserPerm& request_perms) +{ + Inode *in; + bool was_new = false; + if (inode_map.count(st->vino)) { + in = inode_map[st->vino]; + ldout(cct, 12) << __func__ << " had " << *in << " caps " << ccap_string(st->cap.caps) << dendl; + } else { + in = new Inode(this, st->vino, &st->layout); + inode_map[st->vino] = in; + + if (use_faked_inos()) + _assign_faked_ino(in); + + if (!root) { + root = in; + if (use_faked_inos()) + _assign_faked_root(root.get()); + root_ancestor = in; + cwd = root; + } else if (is_mounting()) { + root_parents[root_ancestor] = in; + root_ancestor = in; + } + + // immutable bits + in->ino = st->vino.ino; + in->snapid = st->vino.snapid; + in->mode = st->mode & S_IFMT; + was_new = true; + } + + in->rdev = st->rdev; + if (in->is_symlink()) + in->symlink = st->symlink; + + // only update inode if mds info is strictly newer, or it is the same and projected (odd). + bool new_version = false; + if (in->version == 0 || + ((st->cap.flags & CEPH_CAP_FLAG_AUTH) && + (in->version & ~1) < st->version)) + new_version = true; + + int issued; + in->caps_issued(&issued); + issued |= in->caps_dirty(); + int new_issued = ~issued & (int)st->cap.caps; + + bool need_snapdir_attr_refresh = false; + if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && + !(issued & CEPH_CAP_AUTH_EXCL)) { + in->mode = st->mode; + in->uid = st->uid; + in->gid = st->gid; + in->btime = st->btime; + in->snap_btime = st->snap_btime; + in->snap_metadata = st->snap_metadata; + in->fscrypt_auth = st->fscrypt_auth; + need_snapdir_attr_refresh = true; + } + + if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && + !(issued & CEPH_CAP_LINK_EXCL)) { + in->nlink = st->nlink; + } + + if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { + need_snapdir_attr_refresh = true; + update_inode_file_time(in, issued, st->time_warp_seq, + st->ctime, st->mtime, st->atime); + } + + if (new_version || + (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { + in->layout = st->layout; + in->fscrypt_file = st->fscrypt_file; + update_inode_file_size(in, issued, st->size, st->truncate_seq, st->truncate_size); + } + + if (in->is_dir()) { + if (new_version || (new_issued & CEPH_CAP_FILE_SHARED)) { + in->dirstat = st->dirstat; + } + // dir_layout/rstat/quota are not tracked by capability, update them only if + // the inode stat is from auth mds + if (new_version || (st->cap.flags & CEPH_CAP_FLAG_AUTH)) { + in->dir_layout = st->dir_layout; + ldout(cct, 20) << " dir hash is " << (int)in->dir_layout.dl_dir_hash << dendl; + in->rstat = st->rstat; + in->quota = st->quota; + in->dir_pin = st->dir_pin; + } + // move me if/when version reflects fragtree changes. + if (in->dirfragtree != st->dirfragtree) { + in->dirfragtree = st->dirfragtree; + _fragmap_remove_non_leaves(in); + } + } + + if ((in->xattr_version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && + st->xattrbl.length() && + st->xattr_version > in->xattr_version) { + auto p = st->xattrbl.cbegin(); + decode(in->xattrs, p); + in->xattr_version = st->xattr_version; + need_snapdir_attr_refresh = true; + } + + if (st->inline_version > in->inline_version) { + in->inline_data = st->inline_data; + in->inline_version = st->inline_version; + } + + /* always take a newer change attr */ + ldout(cct, 12) << __func__ << " client inode change_attr: " << in->change_attr << " , mds inodestat change_attr: " << st->change_attr << dendl; + if (st->change_attr > in->change_attr) + in->change_attr = st->change_attr; + + if (st->version > in->version) + in->version = st->version; + + if (was_new) + ldout(cct, 12) << __func__ << " adding " << *in << " caps " << ccap_string(st->cap.caps) << dendl; + + if (!st->cap.caps) + return in; // as with readdir returning indoes in different snaprealms (no caps!) + + if (in->snapid == CEPH_NOSNAP) { + add_update_cap(in, session, st->cap.cap_id, st->cap.caps, st->cap.wanted, + st->cap.seq, st->cap.mseq, inodeno_t(st->cap.realm), + st->cap.flags, request_perms); + if (in->auth_cap && in->auth_cap->session == session) { + in->max_size = st->max_size; + in->rstat = st->rstat; + } + + // setting I_COMPLETE needs to happen after adding the cap + if (in->is_dir() && + (st->cap.caps & CEPH_CAP_FILE_SHARED) && + (issued & CEPH_CAP_FILE_EXCL) == 0 && + in->dirstat.nfiles == 0 && + in->dirstat.nsubdirs == 0) { + ldout(cct, 10) << " marking (I_COMPLETE|I_DIR_ORDERED) on empty dir " << *in << dendl; + in->flags |= I_COMPLETE | I_DIR_ORDERED; + if (in->dir) { + ldout(cct, 10) << " dir is open on empty dir " << in->ino << " with " + << in->dir->dentries.size() << " entries, marking all dentries null" << dendl; + in->dir->readdir_cache.clear(); + for (const auto& p : in->dir->dentries) { + unlink(p.second, true, true); // keep dir, keep dentry + } + if (in->dir->dentries.empty()) + close_dir(in->dir); + } + } + } else { + in->snap_caps |= st->cap.caps; + } + + if (need_snapdir_attr_refresh && in->is_dir() && in->snapid == CEPH_NOSNAP) { + vinodeno_t vino(in->ino, CEPH_SNAPDIR); + if (inode_map.count(vino)) { + refresh_snapdir_attrs(inode_map[vino], in); + } + } + + return in; +} + + +/* + * insert_dentry_inode - insert + link a single dentry + inode into the metadata cache. + */ +Dentry *Client::insert_dentry_inode(Dir *dir, const string& dname, LeaseStat *dlease, + Inode *in, utime_t from, MetaSession *session, + Dentry *old_dentry) +{ + Dentry *dn = NULL; + if (dir->dentries.count(dname)) + dn = dir->dentries[dname]; + + ldout(cct, 12) << __func__ << " '" << dname << "' vino " << in->vino() + << " in dir " << dir->parent_inode->vino() << " dn " << dn + << dendl; + + if (dn && dn->inode) { + if (dn->inode->vino() == in->vino()) { + touch_dn(dn); + ldout(cct, 12) << " had dentry " << dname + << " with correct vino " << dn->inode->vino() + << dendl; + } else { + ldout(cct, 12) << " had dentry " << dname + << " with WRONG vino " << dn->inode->vino() + << dendl; + unlink(dn, true, true); // keep dir, keep dentry + } + } + + if (!dn || !dn->inode) { + InodeRef tmp_ref(in); + if (old_dentry) { + if (old_dentry->dir != dir) { + Inode *old_diri = old_dentry->dir->parent_inode; + clear_dir_complete_and_ordered(old_diri, false); + } + unlink(old_dentry, dir == old_dentry->dir, false); // drop dentry, keep dir open if its the same dir + } + Inode *diri = dir->parent_inode; + clear_dir_complete_and_ordered(diri, false); + dn = link(dir, dname, in, dn); + + if (old_dentry) { + dn->is_renaming = false; + signal_cond_list(waiting_for_rename); + } + } + + update_dentry_lease(dn, dlease, from, session); + return dn; +} + +void Client::update_dentry_lease(Dentry *dn, LeaseStat *dlease, utime_t from, MetaSession *session) +{ + utime_t dttl = from; + dttl += (float)dlease->duration_ms / 1000.0; + + ldout(cct, 15) << __func__ << " " << *dn << " " << *dlease << " from " << from << dendl; + + ceph_assert(dn); + + if (dlease->mask & CEPH_LEASE_VALID) { + if (dttl > dn->lease_ttl) { + ldout(cct, 10) << "got dentry lease on " << dn->name + << " dur " << dlease->duration_ms << "ms ttl " << dttl << dendl; + dn->lease_ttl = dttl; + dn->lease_mds = session->mds_num; + dn->lease_seq = dlease->seq; + dn->lease_gen = session->cap_gen; + } + } + dn->cap_shared_gen = dn->dir->parent_inode->shared_gen; + if (dlease->mask & CEPH_LEASE_PRIMARY_LINK) + dn->mark_primary(); + dn->alternate_name = std::move(dlease->alternate_name); +} + + +/* + * update MDS location cache for a single inode + */ +void Client::update_dir_dist(Inode *in, DirStat *dst, mds_rank_t from) +{ + // auth + ldout(cct, 20) << "got dirfrag map for " << in->ino << " frag " << dst->frag << " to mds " << dst->auth << dendl; + if (dst->auth >= 0) { + in->fragmap[dst->frag] = dst->auth; + } else { + in->fragmap.erase(dst->frag); + } + if (!in->dirfragtree.is_leaf(dst->frag)) { + in->dirfragtree.force_to_leaf(cct, dst->frag); + _fragmap_remove_non_leaves(in); + } + + // replicated, only update from auth mds reply + if (from == dst->auth) { + in->dir_replicated = !dst->dist.empty(); + if (!dst->dist.empty()) + in->frag_repmap[dst->frag].assign(dst->dist.begin(), dst->dist.end()) ; + else + in->frag_repmap.erase(dst->frag); + } +} + +void Client::clear_dir_complete_and_ordered(Inode *diri, bool complete) +{ + if (complete) + diri->dir_release_count++; + else + diri->dir_ordered_count++; + if (diri->flags & I_COMPLETE) { + if (complete) { + ldout(cct, 10) << " clearing (I_COMPLETE|I_DIR_ORDERED) on " << *diri << dendl; + diri->flags &= ~(I_COMPLETE | I_DIR_ORDERED); + } else { + if (diri->flags & I_DIR_ORDERED) { + ldout(cct, 10) << " clearing I_DIR_ORDERED on " << *diri << dendl; + diri->flags &= ~I_DIR_ORDERED; + } + } + if (diri->dir) + diri->dir->readdir_cache.clear(); + } +} + +/* + * insert results from readdir or lssnap into the metadata cache. + */ +void Client::insert_readdir_results(MetaRequest *request, MetaSession *session, + Inode *diri, Inode *diri_other) { + + auto& reply = request->reply; + ConnectionRef con = request->reply->get_connection(); + uint64_t features; + if(session->mds_features.test(CEPHFS_FEATURE_REPLY_ENCODING)) { + features = (uint64_t)-1; + } + else { + features = con->get_features(); + } + + dir_result_t *dirp = request->dirp; + ceph_assert(dirp); + + // the extra buffer list is only set for readdir, lssnap and + // readdir_snapdiff replies + auto p = reply->get_extra_bl().cbegin(); + if (!p.end()) { + // snapdir? + if (request->head.op == CEPH_MDS_OP_LSSNAP) { + ceph_assert(diri); + diri = open_snapdir(diri); + } + bool snapdiff_req = request->head.op == CEPH_MDS_OP_READDIR_SNAPDIFF; + frag_t fg; + unsigned offset_hash; + if (snapdiff_req) { + fg = (unsigned)request->head.args.snapdiff.frag; + offset_hash = (unsigned)request->head.args.snapdiff.offset_hash; + } else { + fg = (unsigned)request->head.args.readdir.frag; + offset_hash = (unsigned)request->head.args.readdir.offset_hash; + } + + // only open dir if we're actually adding stuff to it! + Dir *dir = diri->open_dir(); + ceph_assert(dir); + //open opponent dir for snapdiff if any + Dir *dir_other = nullptr; + if (snapdiff_req) { + ceph_assert(diri_other); + dir_other = diri_other->open_dir(); + ceph_assert(dir_other); + } + + // dirstat + DirStat dst(p, features); + __u32 numdn; + __u16 flags; + decode(numdn, p); + decode(flags, p); + + bool end = ((unsigned)flags & CEPH_READDIR_FRAG_END); + bool hash_order = ((unsigned)flags & CEPH_READDIR_HASH_ORDER); + + unsigned readdir_offset = dirp->next_offset; + string readdir_start = dirp->last_name; + ceph_assert(!readdir_start.empty() || readdir_offset == 2); + + unsigned last_hash = 0; + if (hash_order) { + if (!readdir_start.empty()) { + last_hash = ceph_frag_value(diri->hash_dentry_name(readdir_start)); + } else if (flags & CEPH_READDIR_OFFSET_HASH) { + /* mds understands offset_hash */ + last_hash = offset_hash; + } + } + + if (fg != dst.frag) { + ldout(cct, 10) << "insert_trace got new frag " << fg << " -> " << dst.frag << dendl; + fg = dst.frag; + if (!hash_order) { + readdir_offset = 2; + readdir_start.clear(); + dirp->offset = dir_result_t::make_fpos(fg, readdir_offset, false); + } + } + + ldout(cct, 10) << __func__ << " " << numdn << " readdir items, end=" << end + << ", hash_order=" << hash_order + << ", readdir_start " << readdir_start + << ", last_hash " << last_hash + << ", next_offset " << readdir_offset << dendl; + + if (diri->snapid != CEPH_SNAPDIR && + fg.is_leftmost() && readdir_offset == 2 && + !(hash_order && last_hash)) { + dirp->release_count = diri->dir_release_count; + dirp->ordered_count = diri->dir_ordered_count; + dirp->start_shared_gen = diri->shared_gen; + dirp->cache_index = 0; + } + + dirp->buffer_frag = fg; + + _readdir_drop_dirp_buffer(dirp); + dirp->buffer.reserve(numdn); + + string dname; + LeaseStat dlease; + for (unsigned i=0; i<numdn; i++) { + decode(dname, p); + dlease.decode(p, features); + InodeStat ist(p, features); + + ldout(cct, 15) << "" << i << ": '" << dname << "'" << dendl; + + Inode *in = add_update_inode(&ist, request->sent_stamp, session, + request->perms); + auto *effective_dir = dir; + auto *effective_diri = diri; + + if (snapdiff_req && in->snapid != diri->snapid) { + ceph_assert(diri_other); + ceph_assert(dir_other); + effective_diri = diri_other; + effective_dir = dir_other; + } + Dentry *dn; + if (effective_dir->dentries.count(dname)) { + Dentry *olddn = effective_dir->dentries[dname]; + if (olddn->inode != in) { + // replace incorrect dentry + unlink(olddn, true, true); // keep dir, dentry + dn = link(effective_dir, dname, in, olddn); + ceph_assert(dn == olddn); + } else { + // keep existing dn + dn = olddn; + touch_dn(dn); + } + } else { + // new dn + dn = link(effective_dir, dname, in, NULL); + } + dn->alternate_name = std::move(dlease.alternate_name); + + update_dentry_lease(dn, &dlease, request->sent_stamp, session); + if (hash_order) { + unsigned hash = ceph_frag_value(effective_diri->hash_dentry_name(dname)); + if (hash != last_hash) + readdir_offset = 2; + last_hash = hash; + dn->offset = dir_result_t::make_fpos(hash, readdir_offset++, true); + } else { + dn->offset = dir_result_t::make_fpos(fg, readdir_offset++, false); + } + // add to readdir cache + if (!snapdiff_req && + dirp->release_count == effective_diri->dir_release_count && + dirp->ordered_count == effective_diri->dir_ordered_count && + dirp->start_shared_gen == effective_diri->shared_gen) { + if (dirp->cache_index == effective_dir->readdir_cache.size()) { + if (i == 0) { + ceph_assert(!dirp->inode->is_complete_and_ordered()); + dir->readdir_cache.reserve(dirp->cache_index + numdn); + } + effective_dir->readdir_cache.push_back(dn); + } else if (dirp->cache_index < effective_dir->readdir_cache.size()) { + if (dirp->inode->is_complete_and_ordered()) + ceph_assert(effective_dir->readdir_cache[dirp->cache_index] == dn); + else + effective_dir->readdir_cache[dirp->cache_index] = dn; + } else { + ceph_abort_msg("unexpected readdir buffer idx"); + } + dirp->cache_index++; + } + // add to cached result list + dirp->buffer.push_back(dir_result_t::dentry(dn->offset, dname, dn->alternate_name, in)); + ldout(cct, 15) << __func__ << " " << hex << dn->offset << dec << ": '" << dname << "' -> " << in->ino << dendl; + } + + if (numdn > 0) + dirp->last_name = dname; + if (end) + dirp->next_offset = 2; + else + dirp->next_offset = readdir_offset; + + if (dir->is_empty()) + close_dir(dir); + if (dir_other && dir_other->is_empty()) + close_dir(dir_other); + } +} + +/** insert_trace + * + * insert a trace from a MDS reply into the cache. + */ +Inode* Client::insert_trace(MetaRequest *request, MetaSession *session) +{ + auto& reply = request->reply; + int op = request->get_op(); + + ldout(cct, 10) << "insert_trace from " << request->sent_stamp << " mds." << session->mds_num + << " is_target=" << (int)reply->head.is_target + << " is_dentry=" << (int)reply->head.is_dentry + << dendl; + + auto p = reply->get_trace_bl().cbegin(); + if (request->got_unsafe) { + ldout(cct, 10) << "insert_trace -- already got unsafe; ignoring" << dendl; + ceph_assert(p.end()); + return NULL; + } + + if (p.end()) { + ldout(cct, 10) << "insert_trace -- no trace" << dendl; + + Dentry *d = request->dentry(); + if (d) { + Inode *diri = d->dir->parent_inode; + clear_dir_complete_and_ordered(diri, true); + } + + if (d && reply->get_result() == 0) { + if (op == CEPH_MDS_OP_RENAME) { + // rename + Dentry *od = request->old_dentry(); + ldout(cct, 10) << " unlinking rename src dn " << od << " for traceless reply" << dendl; + ceph_assert(od); + unlink(od, true, true); // keep dir, dentry + } else if (op == CEPH_MDS_OP_RMDIR || + op == CEPH_MDS_OP_UNLINK) { + // unlink, rmdir + ldout(cct, 10) << " unlinking unlink/rmdir dn " << d << " for traceless reply" << dendl; + unlink(d, true, true); // keep dir, dentry + } + } + return NULL; + } + + ConnectionRef con = request->reply->get_connection(); + uint64_t features; + if (session->mds_features.test(CEPHFS_FEATURE_REPLY_ENCODING)) { + features = (uint64_t)-1; + } + else { + features = con->get_features(); + } + ldout(cct, 10) << " features 0x" << hex << features << dec << dendl; + + // snap trace + SnapRealm *realm = NULL; + if (reply->snapbl.length()) + update_snap_trace(session, reply->snapbl, &realm); + + ldout(cct, 10) << " hrm " + << " is_target=" << (int)reply->head.is_target + << " is_dentry=" << (int)reply->head.is_dentry + << dendl; + + InodeStat dirst; + DirStat dst; + string dname; + LeaseStat dlease; + InodeStat ist; + + if (reply->head.is_dentry) { + dirst.decode(p, features); + dst.decode(p, features); + decode(dname, p); + dlease.decode(p, features); + } + + Inode *in = 0; + if (reply->head.is_target) { + ist.decode(p, features); + if (cct->_conf->client_debug_getattr_caps) { + unsigned wanted = 0; + if (op == CEPH_MDS_OP_GETATTR || op == CEPH_MDS_OP_LOOKUP) + wanted = request->head.args.getattr.mask; + else if (op == CEPH_MDS_OP_OPEN || op == CEPH_MDS_OP_CREATE) + wanted = request->head.args.open.mask; + + if ((wanted & CEPH_CAP_XATTR_SHARED) && + !(ist.xattr_version > 0 && ist.xattrbl.length() > 0)) + ceph_abort_msg("MDS reply does not contain xattrs"); + } + + in = add_update_inode(&ist, request->sent_stamp, session, + request->perms); + } + + Inode *diri = NULL; + if (reply->head.is_dentry) { + diri = add_update_inode(&dirst, request->sent_stamp, session, + request->perms); + mds_rank_t from_mds = mds_rank_t(reply->get_source().num()); + update_dir_dist(diri, &dst, from_mds); // dir stat info is attached to .. + + if (in) { + Dir *dir = diri->open_dir(); + insert_dentry_inode(dir, dname, &dlease, in, request->sent_stamp, session, + (op == CEPH_MDS_OP_RENAME) ? request->old_dentry() : NULL); + } else { + Dentry *dn = NULL; + if (diri->dir && diri->dir->dentries.count(dname)) { + dn = diri->dir->dentries[dname]; + if (dn->inode) { + clear_dir_complete_and_ordered(diri, false); + unlink(dn, true, true); // keep dir, dentry + } + } + if (dlease.duration_ms > 0) { + if (!dn) { + Dir *dir = diri->open_dir(); + dn = link(dir, dname, NULL, NULL); + } + update_dentry_lease(dn, &dlease, request->sent_stamp, session); + } + } + } else if (op == CEPH_MDS_OP_LOOKUPSNAP || + op == CEPH_MDS_OP_MKSNAP) { + ldout(cct, 10) << " faking snap lookup weirdness" << dendl; + // fake it for snap lookup + vinodeno_t vino = ist.vino; + vino.snapid = CEPH_SNAPDIR; + ceph_assert(inode_map.count(vino)); + diri = inode_map[vino]; + + string dname = request->path.last_dentry(); + + LeaseStat dlease; + dlease.duration_ms = 0; + + if (in) { + Dir *dir = diri->open_dir(); + insert_dentry_inode(dir, dname, &dlease, in, request->sent_stamp, session); + } else { + if (diri->dir && diri->dir->dentries.count(dname)) { + Dentry *dn = diri->dir->dentries[dname]; + if (dn->inode) + unlink(dn, true, true); // keep dir, dentry + } + } + } + + if (in) { + if (op == CEPH_MDS_OP_READDIR || + op == CEPH_MDS_OP_LSSNAP) { + insert_readdir_results(request, + session, + in, + nullptr); + } else if (op == CEPH_MDS_OP_LOOKUPNAME) { + // hack: return parent inode instead + in = diri; + } else if (op == CEPH_MDS_OP_READDIR_SNAPDIFF) { + // provide both request's inode (aka snapA) and traced one (snapB) + // to properly match snapdiff results + insert_readdir_results(request, + session, + request->inode(), + in); + } + + if (request->dentry() == NULL && in != request->inode()) { + // pin the target inode if its parent dentry is not pinned + request->set_other_inode(in); + } + } + + if (realm) + put_snap_realm(realm); + + request->target = in; + return in; +} + +// ------- + +mds_rank_t Client::choose_target_mds(MetaRequest *req, Inode** phash_diri) +{ + mds_rank_t mds = MDS_RANK_NONE; + __u32 hash = 0; + bool is_hash = false; + int issued = 0; + + Inode *in = NULL; + Dentry *de = NULL; + + if (req->resend_mds >= 0) { + mds = req->resend_mds; + req->resend_mds = -1; + ldout(cct, 10) << __func__ << " resend_mds specified as mds." << mds << dendl; + goto out; + } + + if (cct->_conf->client_use_random_mds) + goto random_mds; + + in = req->inode(); + de = req->dentry(); + if (in) { + ldout(cct, 20) << __func__ << " starting with req->inode " << *in << dendl; + if (req->path.depth()) { + hash = in->hash_dentry_name(req->path[0]); + ldout(cct, 20) << __func__ << " inode dir hash is " << (int)in->dir_layout.dl_dir_hash + << " on " << req->path[0] + << " => " << hash << dendl; + is_hash = true; + } + } else if (de) { + if (de->inode) { + in = de->inode.get(); + ldout(cct, 20) << __func__ << " starting with req->dentry inode " << *in << dendl; + } else { + in = de->dir->parent_inode; + hash = in->hash_dentry_name(de->name); + ldout(cct, 20) << __func__ << " dentry dir hash is " << (int)in->dir_layout.dl_dir_hash + << " on " << de->name + << " => " << hash << dendl; + is_hash = true; + } + } + if (in) { + if (in->snapid != CEPH_NOSNAP) { + ldout(cct, 10) << __func__ << " " << *in << " is snapped, using nonsnap parent" << dendl; + while (in->snapid != CEPH_NOSNAP) { + if (in->snapid == CEPH_SNAPDIR) + in = in->snapdir_parent.get(); + else if (!in->dentries.empty()) + /* In most cases there will only be one dentry, so getting it + * will be the correct action. If there are multiple hard links, + * I think the MDS should be able to redirect as needed*/ + in = in->get_first_parent()->dir->parent_inode; + else { + ldout(cct, 10) << __func__ << "got unlinked inode, can't look at parent" << dendl; + break; + } + } + is_hash = false; + } + + ldout(cct, 20) << __func__ << " " << *in << " is_hash=" << is_hash + << " hash=" << hash << dendl; + + if (req->get_op() == CEPH_MDS_OP_GETATTR) + issued = req->inode()->caps_issued(); + + if (is_hash && S_ISDIR(in->mode) && (!in->fragmap.empty() || !in->frag_repmap.empty())) { + frag_t fg = in->dirfragtree[hash]; + if (!req->auth_is_best(issued)) { + auto repmapit = in->frag_repmap.find(fg); + if (repmapit != in->frag_repmap.end()) { + auto& repmap = repmapit->second; + auto r = ceph::util::generate_random_number<uint64_t>(0, repmap.size()-1); + mds = repmap.at(r); + } + } else if (in->fragmap.count(fg)) { + mds = in->fragmap[fg]; + if (phash_diri) + *phash_diri = in; + } else if (in->auth_cap) { + req->send_to_auth = true; + mds = in->auth_cap->session->mds_num; + } + if (mds >= 0) { + ldout(cct, 10) << __func__ << " from dirfragtree hash" << dendl; + goto out; + } + } + + if (in->auth_cap && req->auth_is_best(issued)) { + mds = in->auth_cap->session->mds_num; + } else if (!in->caps.empty()) { + mds = in->caps.begin()->second.session->mds_num; + } else { + goto random_mds; + } + ldout(cct, 10) << __func__ << " from caps on inode " << *in << dendl; + + goto out; + } + +random_mds: + if (mds < 0) { + mds = _get_random_up_mds(); + ldout(cct, 10) << "did not get mds through better means, so chose random mds " << mds << dendl; + } + +out: + ldout(cct, 20) << "mds is " << mds << dendl; + return mds; +} + +void Client::connect_mds_targets(mds_rank_t mds) +{ + ldout(cct, 10) << __func__ << " for mds." << mds << dendl; + ceph_assert(mds_sessions.count(mds)); + const MDSMap::mds_info_t& info = mdsmap->get_mds_info(mds); + for (const auto &rank : info.export_targets) { + if (mds_sessions.count(rank) == 0 && + mdsmap->is_clientreplay_or_active_or_stopping(rank)) { + ldout(cct, 10) << "check_mds_sessions opening mds." << mds + << " export target mds." << rank << dendl; + + auto session = _get_or_open_mds_session(rank); + if (session->state == MetaSession::STATE_OPENING || + session->state == MetaSession::STATE_OPEN) + continue; + + _open_mds_session(rank); + } + } +} + +void Client::dump_mds_sessions(Formatter *f, bool cap_dump) +{ + f->dump_int("id", get_nodeid().v); + entity_inst_t inst(messenger->get_myname(), messenger->get_myaddr_legacy()); + f->dump_object("inst", inst); + f->dump_stream("inst_str") << inst; + f->dump_stream("addr_str") << inst.addr; + f->open_array_section("sessions"); + for (const auto &p : mds_sessions) { + f->open_object_section("session"); + p.second->dump(f, cap_dump); + f->close_section(); + } + f->close_section(); + f->dump_int("mdsmap_epoch", mdsmap->get_epoch()); +} + +void Client::dump_mds_requests(Formatter *f) +{ + for (map<ceph_tid_t, MetaRequest*>::iterator p = mds_requests.begin(); + p != mds_requests.end(); + ++p) { + f->open_object_section("request"); + p->second->dump(f); + f->close_section(); + } +} + +int Client::verify_reply_trace(int r, MetaSession *session, + MetaRequest *request, const MConstRef<MClientReply>& reply, + InodeRef *ptarget, bool *pcreated, + const UserPerm& perms) +{ + // check whether this request actually did the create, and set created flag + bufferlist extra_bl; + inodeno_t created_ino; + bool got_created_ino = false; + ceph::unordered_map<vinodeno_t, Inode*>::iterator p; + + extra_bl = reply->get_extra_bl(); + if (extra_bl.length() >= 8) { + if (session->mds_features.test(CEPHFS_FEATURE_DELEG_INO)) { + struct openc_response_t ocres; + + decode(ocres, extra_bl); + created_ino = ocres.created_ino; + /* + * The userland cephfs client doesn't have a way to do an async create + * (yet), so just discard delegated_inos for now. Eventually we should + * store them and use them in create calls, even if they are synchronous, + * if only for testing purposes. + */ + ldout(cct, 10) << "delegated_inos: " << ocres.delegated_inos << dendl; + } else { + // u64 containing number of created ino + decode(created_ino, extra_bl); + } + ldout(cct, 10) << "make_request created ino " << created_ino << dendl; + got_created_ino = true; + } + + if (pcreated) + *pcreated = got_created_ino; + + if (request->target) { + *ptarget = request->target; + ldout(cct, 20) << "make_request target is " << *ptarget->get() << dendl; + } else { + if (got_created_ino && (p = inode_map.find(vinodeno_t(created_ino, CEPH_NOSNAP))) != inode_map.end()) { + (*ptarget) = p->second; + ldout(cct, 20) << "make_request created, target is " << *ptarget->get() << dendl; + } else { + // we got a traceless reply, and need to look up what we just + // created. for now, do this by name. someday, do this by the + // ino... which we know! FIXME. + InodeRef target; + Dentry *d = request->dentry(); + if (d) { + if (d->dir) { + ldout(cct, 10) << "make_request got traceless reply, looking up #" + << d->dir->parent_inode->ino << "/" << d->name + << " got_ino " << got_created_ino + << " ino " << created_ino + << dendl; + r = _do_lookup(d->dir->parent_inode, d->name, request->regetattr_mask, + &target, perms); + } else { + // if the dentry is not linked, just do our best. see #5021. + ceph_abort_msg("how did this happen? i want logs!"); + } + } else { + Inode *in = request->inode(); + ldout(cct, 10) << "make_request got traceless reply, forcing getattr on #" + << in->ino << dendl; + r = _getattr(in, request->regetattr_mask, perms, true); + target = in; + } + if (r >= 0) { + // verify ino returned in reply and trace_dist are the same + if (got_created_ino && + created_ino.val != target->ino.val) { + ldout(cct, 5) << "create got ino " << created_ino << " but then failed on lookup; EINTR?" << dendl; + r = -CEPHFS_EINTR; + } + if (ptarget) + ptarget->swap(target); + } + } + } + + return r; +} + + +/** + * make a request + * + * Blocking helper to make an MDS request. + * + * If the ptarget flag is set, behavior changes slightly: the caller + * expects to get a pointer to the inode we are creating or operating + * on. As a result, we will follow up any traceless mutation reply + * with a getattr or lookup to transparently handle a traceless reply + * from the MDS (as when the MDS restarts and the client has to replay + * a request). + * + * @param request the MetaRequest to execute + * @param perms The user uid/gid to execute as (eventually, full group lists?) + * @param ptarget [optional] address to store a pointer to the target inode we want to create or operate on + * @param pcreated [optional; required if ptarget] where to store a bool of whether our create atomically created a file + * @param use_mds [optional] prefer a specific mds (-1 for default) + * @param pdirbl [optional; disallowed if ptarget] where to pass extra reply payload to the caller + */ +int Client::make_request(MetaRequest *request, + const UserPerm& perms, + InodeRef *ptarget, bool *pcreated, + mds_rank_t use_mds, + bufferlist *pdirbl, + size_t feature_needed) +{ + int r = 0; + + // assign a unique tid + ceph_tid_t tid = ++last_tid; + request->set_tid(tid); + + // and timestamp + request->op_stamp = ceph_clock_now(); + request->created = ceph::coarse_mono_clock::now(); + + // make note + mds_requests[tid] = request->get(); + if (oldest_tid == 0 && request->get_op() != CEPH_MDS_OP_SETFILELOCK) + oldest_tid = tid; + + request->set_caller_perms(perms); + + if (cct->_conf->client_inject_fixed_oldest_tid) { + ldout(cct, 20) << __func__ << " injecting fixed oldest_client_tid(1)" << dendl; + request->set_oldest_client_tid(1); + } else { + request->set_oldest_client_tid(oldest_tid); + } + + // hack target mds? + if (use_mds >= 0) + request->resend_mds = use_mds; + + MetaSessionRef session = NULL; + while (1) { + if (request->aborted()) + break; + + if (blocklisted) { + request->abort(-CEPHFS_EBLOCKLISTED); + break; + } + + // set up wait cond + ceph::condition_variable caller_cond; + request->caller_cond = &caller_cond; + + // choose mds + Inode *hash_diri = NULL; + mds_rank_t mds = choose_target_mds(request, &hash_diri); + int mds_state = (mds == MDS_RANK_NONE) ? MDSMap::STATE_NULL : mdsmap->get_state(mds); + if (mds_state != MDSMap::STATE_ACTIVE && mds_state != MDSMap::STATE_STOPPING) { + if (mds_state == MDSMap::STATE_NULL && mds >= mdsmap->get_max_mds()) { + if (hash_diri) { + ldout(cct, 10) << " target mds." << mds << " has stopped, remove it from fragmap" << dendl; + _fragmap_remove_stopped_mds(hash_diri, mds); + } else { + ldout(cct, 10) << " target mds." << mds << " has stopped, trying a random mds" << dendl; + request->resend_mds = _get_random_up_mds(); + } + } else { + ldout(cct, 10) << " target mds." << mds << " not active, waiting for new mdsmap" << dendl; + wait_on_list(waiting_for_mdsmap); + } + continue; + } + + // open a session? + if (!have_open_session(mds)) { + session = _get_or_open_mds_session(mds); + if (session->state == MetaSession::STATE_REJECTED) { + request->abort(-CEPHFS_EPERM); + break; + } + // wait + if (session->state == MetaSession::STATE_OPENING) { + ldout(cct, 10) << "waiting for session to mds." << mds << " to open" << dendl; + wait_on_context_list(session->waiting_for_open); + continue; + } + + if (!have_open_session(mds)) + continue; + } else { + session = mds_sessions.at(mds); + } + + if (feature_needed != ULONG_MAX && !session->mds_features.test(feature_needed)) { + request->abort(-CEPHFS_EOPNOTSUPP); + break; + } + + // send request. + send_request(request, session.get()); + + // wait for signal + ldout(cct, 20) << "awaiting reply|forward|kick on " << &caller_cond << dendl; + request->kick = false; + std::unique_lock l{client_lock, std::adopt_lock}; + caller_cond.wait(l, [request] { + return (request->reply || // reply + request->resend_mds >= 0 || // forward + request->kick); + }); + l.release(); + request->caller_cond = nullptr; + + // did we get a reply? + if (request->reply) + break; + } + + if (!request->reply) { + ceph_assert(request->aborted()); + ceph_assert(!request->got_unsafe); + r = request->get_abort_code(); + request->item.remove_myself(); + unregister_request(request); + put_request(request); + return r; + } + + // got it! + auto reply = std::move(request->reply); + r = reply->get_result(); + if (r >= 0) + request->success = true; + + // kick dispatcher (we've got it!) + ceph_assert(request->dispatch_cond); + request->dispatch_cond->notify_all(); + ldout(cct, 20) << "sendrecv kickback on tid " << tid << " " << request->dispatch_cond << dendl; + request->dispatch_cond = 0; + + if (r >= 0 && ptarget) + r = verify_reply_trace(r, session.get(), request, reply, ptarget, pcreated, perms); + + if (pdirbl) + *pdirbl = reply->get_extra_bl(); + + // -- log times -- + utime_t lat = ceph_clock_now(); + lat -= request->sent_stamp; + ldout(cct, 20) << "lat " << lat << dendl; + + ++nr_metadata_request; + update_io_stat_metadata(lat); + + put_request(request); + return r; +} + +void Client::unregister_request(MetaRequest *req) +{ + mds_requests.erase(req->tid); + if (req->tid == oldest_tid) { + map<ceph_tid_t, MetaRequest*>::iterator p = mds_requests.upper_bound(oldest_tid); + while (true) { + if (p == mds_requests.end()) { + oldest_tid = 0; + break; + } + if (p->second->get_op() != CEPH_MDS_OP_SETFILELOCK) { + oldest_tid = p->first; + break; + } + ++p; + } + } + put_request(req); +} + +void Client::put_request(MetaRequest *request) +{ + if (request->_put()) { + int op = -1; + if (request->success) + op = request->get_op(); + InodeRef other_in; + request->take_other_inode(&other_in); + delete request; + + if (other_in && + (op == CEPH_MDS_OP_RMDIR || + op == CEPH_MDS_OP_RENAME || + op == CEPH_MDS_OP_RMSNAP)) { + _try_to_trim_inode(other_in.get(), false); + } + } +} + +int Client::encode_inode_release(Inode *in, MetaRequest *req, + mds_rank_t mds, int drop, + int unless, int force) +{ + ldout(cct, 20) << __func__ << " enter(in:" << *in << ", req:" << req + << " mds:" << mds << ", drop:" << ccap_string(drop) << ", unless:" << ccap_string(unless) + << ", force:" << force << ")" << dendl; + int released = 0; + auto it = in->caps.find(mds); + if (it != in->caps.end()) { + Cap &cap = it->second; + drop &= ~(in->dirty_caps | get_caps_used(in)); + if ((drop & cap.issued) && + !(unless & cap.issued)) { + ldout(cct, 25) << "dropping caps " << ccap_string(drop) << dendl; + cap.issued &= ~drop; + cap.implemented &= ~drop; + released = 1; + } else { + released = force; + } + if (released) { + cap.wanted = in->caps_wanted(); + if (&cap == in->auth_cap && + !(cap.wanted & CEPH_CAP_ANY_FILE_WR)) { + in->requested_max_size = 0; + ldout(cct, 25) << "reset requested_max_size due to not wanting any file write cap" << dendl; + } + ceph_mds_request_release rel; + rel.ino = in->ino; + rel.cap_id = cap.cap_id; + rel.seq = cap.seq; + rel.issue_seq = cap.issue_seq; + rel.mseq = cap.mseq; + rel.caps = cap.implemented; + rel.wanted = cap.wanted; + rel.dname_len = 0; + rel.dname_seq = 0; + req->cap_releases.push_back(MClientRequest::Release(rel,"")); + } + } + ldout(cct, 25) << __func__ << " exit(in:" << *in << ") released:" + << released << dendl; + return released; +} + +void Client::encode_dentry_release(Dentry *dn, MetaRequest *req, + mds_rank_t mds, int drop, int unless) +{ + ldout(cct, 20) << __func__ << " enter(dn:" + << dn << ")" << dendl; + int released = 0; + if (dn->dir) + released = encode_inode_release(dn->dir->parent_inode, req, + mds, drop, unless, 1); + if (released && dn->lease_mds == mds) { + ldout(cct, 25) << "preemptively releasing dn to mds" << dendl; + auto& rel = req->cap_releases.back(); + rel.item.dname_len = dn->name.length(); + rel.item.dname_seq = dn->lease_seq; + rel.dname = dn->name; + dn->lease_mds = -1; + } + ldout(cct, 25) << __func__ << " exit(dn:" + << dn << ")" << dendl; +} + + +/* + * This requires the MClientRequest *request member to be set. + * It will error out horribly without one. + * Additionally, if you set any *drop member, you'd better have + * set the corresponding dentry! + */ +void Client::encode_cap_releases(MetaRequest *req, mds_rank_t mds) +{ + ldout(cct, 20) << __func__ << " enter (req: " + << req << ", mds: " << mds << ")" << dendl; + if (req->inode_drop && req->inode()) + encode_inode_release(req->inode(), req, + mds, req->inode_drop, + req->inode_unless); + + if (req->old_inode_drop && req->old_inode()) + encode_inode_release(req->old_inode(), req, + mds, req->old_inode_drop, + req->old_inode_unless); + if (req->other_inode_drop && req->other_inode()) + encode_inode_release(req->other_inode(), req, + mds, req->other_inode_drop, + req->other_inode_unless); + + if (req->dentry_drop && req->dentry()) + encode_dentry_release(req->dentry(), req, + mds, req->dentry_drop, + req->dentry_unless); + + if (req->old_dentry_drop && req->old_dentry()) + encode_dentry_release(req->old_dentry(), req, + mds, req->old_dentry_drop, + req->old_dentry_unless); + ldout(cct, 25) << __func__ << " exit (req: " + << req << ", mds " << mds <<dendl; +} + +bool Client::have_open_session(mds_rank_t mds) +{ + const auto &it = mds_sessions.find(mds); + return it != mds_sessions.end() && + (it->second->state == MetaSession::STATE_OPEN || + it->second->state == MetaSession::STATE_STALE); +} + +MetaSessionRef Client::_get_mds_session(mds_rank_t mds, Connection *con) +{ + const auto &it = mds_sessions.find(mds); + if (it == mds_sessions.end() || it->second->con != con) { + return NULL; + } else { + return it->second; + } +} + +MetaSessionRef Client::_get_or_open_mds_session(mds_rank_t mds) +{ + auto it = mds_sessions.find(mds); + return it == mds_sessions.end() ? _open_mds_session(mds) : it->second; +} + +/** + * Populate a map of strings with client-identifying metadata, + * such as the hostname. Call this once at initialization. + */ +void Client::populate_metadata(const std::string &mount_root) +{ + // Hostname +#ifdef _WIN32 + // TODO: move this to compat.h + char hostname[64]; + DWORD hostname_sz = 64; + GetComputerNameA(hostname, &hostname_sz); + metadata["hostname"] = hostname; +#else + struct utsname u; + int r = uname(&u); + if (r >= 0) { + metadata["hostname"] = u.nodename; + ldout(cct, 20) << __func__ << " read hostname '" << u.nodename << "'" << dendl; + } else { + ldout(cct, 1) << __func__ << " failed to read hostname (" << cpp_strerror(r) << ")" << dendl; + } +#endif + + metadata["pid"] = stringify(getpid()); + + // Ceph entity id (the '0' in "client.0") + metadata["entity_id"] = cct->_conf->name.get_id(); + + // Our mount position + if (!mount_root.empty()) { + metadata["root"] = mount_root; + } + + // Ceph version + metadata["ceph_version"] = pretty_version_to_str(); + metadata["ceph_sha1"] = git_version_to_str(); + + // Apply any metadata from the user's configured overrides + std::vector<std::string> tokens; + get_str_vec(cct->_conf->client_metadata, ",", tokens); + for (const auto &i : tokens) { + auto eqpos = i.find("="); + // Throw out anything that isn't of the form "<str>=<str>" + if (eqpos == 0 || eqpos == std::string::npos || eqpos == i.size()) { + lderr(cct) << "Invalid metadata keyval pair: '" << i << "'" << dendl; + continue; + } + metadata[i.substr(0, eqpos)] = i.substr(eqpos + 1); + } +} + +/** + * Optionally add or override client metadata fields. + */ +void Client::update_metadata(std::string const &k, std::string const &v) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + ceph_assert(iref_reader.is_state_satisfied()); + + std::scoped_lock l(client_lock); + + auto it = metadata.find(k); + if (it != metadata.end()) { + ldout(cct, 1) << __func__ << " warning, overriding metadata field '" << k + << "' from '" << it->second << "' to '" << v << "'" << dendl; + } + + metadata[k] = v; +} + +MetaSessionRef Client::_open_mds_session(mds_rank_t mds) +{ + ldout(cct, 10) << __func__ << " mds." << mds << dendl; + auto addrs = mdsmap->get_addrs(mds); + auto em = mds_sessions.emplace(std::piecewise_construct, + std::forward_as_tuple(mds), + std::forward_as_tuple(new MetaSession(mds, messenger->connect_to_mds(addrs), addrs))); + ceph_assert(em.second); /* not already present */ + auto session = em.first->second; + + auto m = make_message<MClientSession>(CEPH_SESSION_REQUEST_OPEN); + m->metadata = metadata; + m->supported_features = feature_bitset_t(CEPHFS_FEATURES_CLIENT_SUPPORTED); + m->metric_spec = feature_bitset_t(CEPHFS_METRIC_FEATURES_ALL); + session->con->send_message2(std::move(m)); + return session; +} + +void Client::_close_mds_session(MetaSession *s) +{ + ldout(cct, 2) << __func__ << " mds." << s->mds_num << " seq " << s->seq << dendl; + s->state = MetaSession::STATE_CLOSING; + s->con->send_message2(make_message<MClientSession>(CEPH_SESSION_REQUEST_CLOSE, s->seq)); +} + +void Client::_closed_mds_session(MetaSession *s, int err, bool rejected) +{ + ldout(cct, 5) << __func__ << " mds." << s->mds_num << " seq " << s->seq << dendl; + if (rejected && s->state != MetaSession::STATE_CLOSING) + s->state = MetaSession::STATE_REJECTED; + else + s->state = MetaSession::STATE_CLOSED; + s->con->mark_down(); + signal_context_list(s->waiting_for_open); + mount_cond.notify_all(); + remove_session_caps(s, err); + kick_requests_closed(s); + mds_ranks_closing.erase(s->mds_num); + if (s->state == MetaSession::STATE_CLOSED) + mds_sessions.erase(s->mds_num); +} + +static void reinit_mds_features(MetaSession *session, + const MConstRef<MClientSession>& m) { + session->mds_features = std::move(m->supported_features); + session->mds_metric_flags = std::move(m->metric_spec.metric_flags); +} + +void Client::handle_client_session(const MConstRef<MClientSession>& m) +{ + mds_rank_t from = mds_rank_t(m->get_source().num()); + ldout(cct, 10) << __func__ << " " << *m << " from mds." << from << dendl; + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(from, m->get_connection().get()); + if (!session) { + ldout(cct, 10) << " discarding session message from sessionless mds " << m->get_source_inst() << dendl; + return; + } + + switch (m->get_op()) { + case CEPH_SESSION_OPEN: + { + if (session->state == MetaSession::STATE_OPEN) { + ldout(cct, 10) << "mds." << from << " already opened, ignore it" + << dendl; + // The MDS could send a client_session(open) message even when + // the session state is STATE_OPEN. Normally, its fine to + // ignore this message, but, if the MDS sent this message just + // after it got upgraded, the MDS feature bits could differ + // than the one before the upgrade - so, refresh the feature + // bits the client holds. + reinit_mds_features(session.get(), m); + return; + } + /* + * The connection maybe broken and the session in client side + * has been reinitialized, need to update the seq anyway. + */ + if (!session->seq && m->get_seq()) + session->seq = m->get_seq(); + + reinit_mds_features(session.get(), m); + + renew_caps(session.get()); + session->state = MetaSession::STATE_OPEN; + if (is_unmounting()) + mount_cond.notify_all(); + else + connect_mds_targets(from); + signal_context_list(session->waiting_for_open); + break; + } + + case CEPH_SESSION_CLOSE: + _closed_mds_session(session.get()); + break; + + case CEPH_SESSION_RENEWCAPS: + if (session->cap_renew_seq == m->get_seq()) { + bool was_stale = ceph_clock_now() >= session->cap_ttl; + session->cap_ttl = + session->last_cap_renew_request + mdsmap->get_session_timeout(); + if (was_stale) + wake_up_session_caps(session.get(), false); + } + break; + + case CEPH_SESSION_STALE: + // invalidate session caps/leases + session->cap_gen++; + session->cap_ttl = ceph_clock_now(); + session->cap_ttl -= 1; + renew_caps(session.get()); + break; + + case CEPH_SESSION_RECALL_STATE: + /* + * Call the renew caps and flush cap releases just before + * triming the caps in case the tick() won't get a chance + * to run them, which could cause the client to be blocklisted + * and MDS daemons trying to recall the caps again and + * again. + * + * In most cases it will do nothing, and the new cap releases + * added by trim_caps() followed will be deferred flushing + * by tick(). + */ + renew_and_flush_cap_releases(); + trim_caps(session.get(), m->get_max_caps()); + break; + + case CEPH_SESSION_FLUSHMSG: + /* flush cap release */ + if (auto& m = session->release; m) { + session->con->send_message2(std::move(m)); + } + session->con->send_message2(make_message<MClientSession>(CEPH_SESSION_FLUSHMSG_ACK, m->get_seq())); + break; + + case CEPH_SESSION_FORCE_RO: + force_session_readonly(session.get()); + break; + + case CEPH_SESSION_REJECT: + { + std::string_view error_str; + auto it = m->metadata.find("error_string"); + if (it != m->metadata.end()) + error_str = it->second; + else + error_str = "unknown error"; + lderr(cct) << "mds." << from << " rejected us (" << error_str << ")" << dendl; + + _closed_mds_session(session.get(), -CEPHFS_EPERM, true); + } + break; + + default: + ceph_abort(); + } +} + +bool Client::_any_stale_sessions() const +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + for (const auto &p : mds_sessions) { + if (p.second->state == MetaSession::STATE_STALE) { + return true; + } + } + + return false; +} + +void Client::_kick_stale_sessions() +{ + ldout(cct, 1) << __func__ << dendl; + + for (auto it = mds_sessions.begin(); it != mds_sessions.end(); ) { + auto s = it->second; + if (s->state == MetaSession::STATE_REJECTED) { + mds_sessions.erase(it->first); + continue; + } + if (s->state == MetaSession::STATE_STALE) + _closed_mds_session(s.get()); + } +} + +void Client::send_request(MetaRequest *request, MetaSession *session, + bool drop_cap_releases) +{ + // make the request + mds_rank_t mds = session->mds_num; + ldout(cct, 10) << __func__ << " rebuilding request " << request->get_tid() + << " for mds." << mds << dendl; + auto r = build_client_request(request, mds); + if (!r) + return; + + if (request->dentry()) { + r->set_dentry_wanted(); + } + if (request->got_unsafe) { + r->set_replayed_op(); + if (request->target) + r->head.ino = request->target->ino; + } else { + encode_cap_releases(request, mds); + if (drop_cap_releases) // we haven't send cap reconnect yet, drop cap releases + request->cap_releases.clear(); + else + r->releases.swap(request->cap_releases); + } + r->set_mdsmap_epoch(mdsmap->get_epoch()); + if (r->head.op == CEPH_MDS_OP_SETXATTR) { + objecter->with_osdmap([r](const OSDMap& o) { + r->set_osdmap_epoch(o.get_epoch()); + }); + } + + if (request->mds == -1) { + request->sent_stamp = ceph_clock_now(); + ldout(cct, 20) << __func__ << " set sent_stamp to " << request->sent_stamp << dendl; + } + request->mds = mds; + + Inode *in = request->inode(); + if (in) { + auto it = in->caps.find(mds); + if (it != in->caps.end()) { + request->sent_on_mseq = it->second.mseq; + } + } + + session->requests.push_back(&request->item); + + ldout(cct, 10) << __func__ << " " << *r << " to mds." << mds << dendl; + session->con->send_message2(std::move(r)); +} + +ref_t<MClientRequest> Client::build_client_request(MetaRequest *request, mds_rank_t mds) +{ + auto session = mds_sessions.at(mds); + bool old_version = !session->mds_features.test(CEPHFS_FEATURE_32BITS_RETRY_FWD); + + /* + * Avoid inifinite retrying after overflow. + * + * The client will increase the retry count and if the MDS is + * old version, so we limit to retry at most 256 times. + */ + if (request->retry_attempt) { + int old_max_retry = sizeof(((struct ceph_mds_request_head*)0)->num_retry); + old_max_retry = 1 << (old_max_retry * CHAR_BIT); + if ((old_version && request->retry_attempt >= old_max_retry) || + (uint32_t)request->retry_attempt >= UINT32_MAX) { + request->abort(-CEPHFS_EMULTIHOP); + request->caller_cond->notify_all(); + ldout(cct, 1) << __func__ << " request tid " << request->tid + << " retry seq overflow" << ", abort it" << dendl; + return nullptr; + } + } + + auto req = make_message<MClientRequest>(request->get_op(), session->mds_features); + req->set_tid(request->tid); + req->set_stamp(request->op_stamp); + memcpy(&req->head, &request->head, sizeof(ceph_mds_request_head)); + + // if the filepath's haven't been set, set them! + if (request->path.empty()) { + Inode *in = request->inode(); + Dentry *de = request->dentry(); + if (in) + in->make_nosnap_relative_path(request->path); + else if (de) { + if (de->inode) + de->inode->make_nosnap_relative_path(request->path); + else if (de->dir) { + de->dir->parent_inode->make_nosnap_relative_path(request->path); + request->path.push_dentry(de->name); + } + else ldout(cct, 1) << "Warning -- unable to construct a filepath!" + << " No path, inode, or appropriately-endowed dentry given!" + << dendl; + } else ldout(cct, 1) << "Warning -- unable to construct a filepath!" + << " No path, inode, or dentry given!" + << dendl; + } + req->set_filepath(request->get_filepath()); + req->set_filepath2(request->get_filepath2()); + req->set_alternate_name(request->alternate_name); + req->set_data(request->data); + req->fscrypt_auth = request->fscrypt_auth; + req->fscrypt_file = request->fscrypt_file; + req->set_retry_attempt(request->retry_attempt++); + req->head.ext_num_fwd = request->num_fwd; + const gid_t *_gids; + int gid_count = request->perms.get_gids(&_gids); + req->set_gid_list(gid_count, _gids); + return req; +} + + + +void Client::handle_client_request_forward(const MConstRef<MClientRequestForward>& fwd) +{ + mds_rank_t mds = mds_rank_t(fwd->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds, fwd->get_connection().get()); + if (!session) { + return; + } + ceph_tid_t tid = fwd->get_tid(); + + if (mds_requests.count(tid) == 0) { + ldout(cct, 10) << __func__ << " no pending request on tid " << tid << dendl; + return; + } + + MetaRequest *request = mds_requests[tid]; + ceph_assert(request); + + /* + * Avoid inifinite retrying after overflow. + * + * The MDS will increase the fwd count and in client side + * if the num_fwd is less than the one saved in request + * that means the MDS is an old version and overflowed of + * 8 bits. + */ + auto num_fwd = fwd->get_num_fwd(); + if (num_fwd <= request->num_fwd || (uint32_t)num_fwd >= UINT32_MAX) { + request->abort(-CEPHFS_EMULTIHOP); + request->caller_cond->notify_all(); + ldout(cct, 0) << __func__ << " request tid " << tid << " new num_fwd " + << num_fwd << " old num_fwd " << request->num_fwd << ", fwd seq overflow" + << ", abort it" << dendl; + return; + } + + // reset retry counter + request->retry_attempt = 0; + + // request not forwarded, or dest mds has no session. + // resend. + ldout(cct, 10) << __func__ << " tid " << tid + << " fwd " << fwd->get_num_fwd() + << " to mds." << fwd->get_dest_mds() + << ", resending to " << fwd->get_dest_mds() + << dendl; + + request->mds = -1; + request->item.remove_myself(); + request->num_fwd = num_fwd; + request->resend_mds = fwd->get_dest_mds(); + request->caller_cond->notify_all(); +} + +bool Client::is_dir_operation(MetaRequest *req) +{ + int op = req->get_op(); + if (op == CEPH_MDS_OP_MKNOD || op == CEPH_MDS_OP_LINK || + op == CEPH_MDS_OP_UNLINK || op == CEPH_MDS_OP_RENAME || + op == CEPH_MDS_OP_MKDIR || op == CEPH_MDS_OP_RMDIR || + op == CEPH_MDS_OP_SYMLINK || op == CEPH_MDS_OP_CREATE) + return true; + return false; +} + +void Client::handle_client_reply(const MConstRef<MClientReply>& reply) +{ + mds_rank_t mds_num = mds_rank_t(reply->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds_num, reply->get_connection().get()); + if (!session) { + return; + } + + ceph_tid_t tid = reply->get_tid(); + bool is_safe = reply->is_safe(); + + if (mds_requests.count(tid) == 0) { + lderr(cct) << __func__ << " no pending request on tid " << tid + << " safe is:" << is_safe << dendl; + return; + } + MetaRequest *request = mds_requests.at(tid); + + ldout(cct, 20) << __func__ << " got a reply. Safe:" << is_safe + << " tid " << tid << dendl; + + // correct sessions ? + if (request->mds != mds_num) { + ldout(cct, 0) << "got a stale reply from mds." << mds_num + << " instead of mds." << request->mds << dendl; + return; + } + + if (request->got_unsafe && !is_safe) { + //duplicate response + ldout(cct, 0) << "got a duplicate reply on tid " << tid << " from mds " + << mds_num << " safe:" << is_safe << dendl; + return; + } + + ceph_assert(!request->reply); + request->reply = reply; + insert_trace(request, session.get()); + + // Handle unsafe reply + if (!is_safe) { + request->got_unsafe = true; + session->unsafe_requests.push_back(&request->unsafe_item); + if (is_dir_operation(request)) { + Inode *dir = request->inode(); + ceph_assert(dir); + dir->unsafe_ops.push_back(&request->unsafe_dir_item); + } + if (request->target) { + InodeRef &in = request->target; + in->unsafe_ops.push_back(&request->unsafe_target_item); + } + } + + // Only signal the caller once (on the first reply): + // Either its an unsafe reply, or its a safe reply and no unsafe reply was sent. + if (!is_safe || !request->got_unsafe) { + ceph::condition_variable cond; + request->dispatch_cond = &cond; + + // wake up waiter + ldout(cct, 20) << __func__ << " signalling caller " << (void*)request->caller_cond << dendl; + request->caller_cond->notify_all(); + + // wake for kick back + std::unique_lock l{client_lock, std::adopt_lock}; + cond.wait(l, [tid, request, &cond, this] { + if (request->dispatch_cond) { + ldout(cct, 20) << "handle_client_reply awaiting kickback on tid " + << tid << " " << &cond << dendl; + } + return !request->dispatch_cond; + }); + l.release(); + } + + if (is_safe) { + // the filesystem change is committed to disk + // we're done, clean up + if (request->got_unsafe) { + request->unsafe_item.remove_myself(); + request->unsafe_dir_item.remove_myself(); + request->unsafe_target_item.remove_myself(); + signal_cond_list(request->waitfor_safe); + } + request->item.remove_myself(); + unregister_request(request); + } + if (is_unmounting()) + mount_cond.notify_all(); +} + +void Client::_handle_full_flag(int64_t pool) +{ + ldout(cct, 1) << __func__ << ": FULL: cancelling outstanding operations " + << "on " << pool << dendl; + // Cancel all outstanding ops in this pool with -CEPHFS_ENOSPC: it is necessary + // to do this rather than blocking, because otherwise when we fill up we + // potentially lock caps forever on files with dirty pages, and we need + // to be able to release those caps to the MDS so that it can delete files + // and free up space. + epoch_t cancelled_epoch = objecter->op_cancel_writes(-CEPHFS_ENOSPC, pool); + + // For all inodes with layouts in this pool and a pending flush write op + // (i.e. one of the ones we will cancel), we've got to purge_set their data + // from ObjectCacher so that it doesn't re-issue the write in response to + // the ENOSPC error. + // Fortunately since we're cancelling everything in a given pool, we don't + // need to know which ops belong to which ObjectSet, we can just blow all + // the un-flushed cached data away and mark any dirty inodes' async_err + // field with -CEPHFS_ENOSPC as long as we're sure all the ops we cancelled were + // affecting this pool, and all the objectsets we're purging were also + // in this pool. + for (unordered_map<vinodeno_t,Inode*>::iterator i = inode_map.begin(); + i != inode_map.end(); ++i) + { + Inode *inode = i->second; + if (inode->oset.dirty_or_tx + && (pool == -1 || inode->layout.pool_id == pool)) { + ldout(cct, 4) << __func__ << ": FULL: inode 0x" << std::hex << i->first << std::dec + << " has dirty objects, purging and setting ENOSPC" << dendl; + objectcacher->purge_set(&inode->oset); + inode->set_async_err(-CEPHFS_ENOSPC); + } + } + + if (cancelled_epoch != (epoch_t)-1) { + set_cap_epoch_barrier(cancelled_epoch); + } +} + +void Client::handle_osd_map(const MConstRef<MOSDMap>& m) +{ + std::scoped_lock cl(client_lock); + + const auto myaddrs = messenger->get_myaddrs(); + bool new_blocklist = objecter->with_osdmap( + [&](const OSDMap& o) { + return o.is_blocklisted(myaddrs); + }); + + if (new_blocklist && !blocklisted) { + auto epoch = objecter->with_osdmap([](const OSDMap &o){ + return o.get_epoch(); + }); + lderr(cct) << "I was blocklisted at osd epoch " << epoch << dendl; + blocklisted = true; + + _abort_mds_sessions(-CEPHFS_EBLOCKLISTED); + + // Since we know all our OSD ops will fail, cancel them all preemtively, + // so that on an unhealthy cluster we can umount promptly even if e.g. + // some PGs were inaccessible. + objecter->op_cancel_writes(-CEPHFS_EBLOCKLISTED); + + } + + if (blocklisted) { + // Handle case where we were blocklisted but no longer are + blocklisted = objecter->with_osdmap([myaddrs](const OSDMap &o){ + return o.is_blocklisted(myaddrs);}); + } + + // Always subscribe to next osdmap for blocklisted client + // until this client is not blocklisted. + if (blocklisted) { + objecter->maybe_request_map(); + } + + if (objecter->osdmap_full_flag()) { + _handle_full_flag(-1); + } else { + // Accumulate local list of full pools so that I can drop + // the objecter lock before re-entering objecter in + // cancel_writes + std::vector<int64_t> full_pools; + + objecter->with_osdmap([&full_pools](const OSDMap &o) { + for (const auto& kv : o.get_pools()) { + if (kv.second.has_flag(pg_pool_t::FLAG_FULL)) { + full_pools.push_back(kv.first); + } + } + }); + + for (auto p : full_pools) + _handle_full_flag(p); + + // Subscribe to subsequent maps to watch for the full flag going + // away. For the global full flag objecter does this for us, but + // it pays no attention to the per-pool full flag so in this branch + // we do it ourselves. + if (!full_pools.empty()) { + objecter->maybe_request_map(); + } + } +} + + +// ------------------------ +// incoming messages + + +bool Client::ms_dispatch2(const MessageRef &m) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + if (!iref_reader.is_state_satisfied()) { + ldout(cct, 10) << "inactive, discarding " << *m << dendl; + return true; + } + + switch (m->get_type()) { + // mounting and mds sessions + case CEPH_MSG_MDS_MAP: + handle_mds_map(ref_cast<MMDSMap>(m)); + break; + case CEPH_MSG_FS_MAP: + handle_fs_map(ref_cast<MFSMap>(m)); + break; + case CEPH_MSG_FS_MAP_USER: + handle_fs_map_user(ref_cast<MFSMapUser>(m)); + break; + case CEPH_MSG_CLIENT_SESSION: + handle_client_session(ref_cast<MClientSession>(m)); + break; + + case CEPH_MSG_OSD_MAP: + handle_osd_map(ref_cast<MOSDMap>(m)); + break; + + // requests + case CEPH_MSG_CLIENT_REQUEST_FORWARD: + handle_client_request_forward(ref_cast<MClientRequestForward>(m)); + break; + case CEPH_MSG_CLIENT_REPLY: + handle_client_reply(ref_cast<MClientReply>(m)); + break; + + // reclaim reply + case CEPH_MSG_CLIENT_RECLAIM_REPLY: + handle_client_reclaim_reply(ref_cast<MClientReclaimReply>(m)); + break; + + case CEPH_MSG_CLIENT_SNAP: + handle_snap(ref_cast<MClientSnap>(m)); + break; + case CEPH_MSG_CLIENT_CAPS: + handle_caps(ref_cast<MClientCaps>(m)); + break; + case CEPH_MSG_CLIENT_LEASE: + handle_lease(ref_cast<MClientLease>(m)); + break; + case MSG_COMMAND_REPLY: + if (m->get_source().type() == CEPH_ENTITY_TYPE_MDS) { + handle_command_reply(ref_cast<MCommandReply>(m)); + } else { + return false; + } + break; + case CEPH_MSG_CLIENT_QUOTA: + handle_quota(ref_cast<MClientQuota>(m)); + break; + + default: + return false; + } + + // unmounting? + std::scoped_lock cl(client_lock); + if (is_unmounting()) { + ldout(cct, 10) << "unmounting: trim pass, size was " << lru.lru_get_size() + << "+" << inode_map.size() << dendl; + uint64_t size = lru.lru_get_size() + inode_map.size(); + trim_cache(); + if (size > lru.lru_get_size() + inode_map.size()) { + ldout(cct, 10) << "unmounting: trim pass, cache shrank, poking unmount()" << dendl; + mount_cond.notify_all(); + } else { + ldout(cct, 10) << "unmounting: trim pass, size still " << lru.lru_get_size() + << "+" << inode_map.size() << dendl; + } + } + + return true; +} + +void Client::handle_fs_map(const MConstRef<MFSMap>& m) +{ + std::scoped_lock cl(client_lock); + fsmap.reset(new FSMap(m->get_fsmap())); + + signal_cond_list(waiting_for_fsmap); + + monclient->sub_got("fsmap", fsmap->get_epoch()); +} + +void Client::handle_fs_map_user(const MConstRef<MFSMapUser>& m) +{ + std::scoped_lock cl(client_lock); + fsmap_user.reset(new FSMapUser); + *fsmap_user = m->get_fsmap(); + + monclient->sub_got("fsmap.user", fsmap_user->get_epoch()); + signal_cond_list(waiting_for_fsmap); +} + +// Cancel all the commands for missing or laggy GIDs +void Client::cancel_commands(const MDSMap& newmap) +{ + std::vector<ceph_tid_t> cancel_ops; + + std::scoped_lock cmd_lock(command_lock); + auto &commands = command_table.get_commands(); + for (const auto &[tid, op] : commands) { + const mds_gid_t op_mds_gid = op.mds_gid; + if (newmap.is_dne_gid(op_mds_gid) || newmap.is_laggy_gid(op_mds_gid)) { + ldout(cct, 1) << __func__ << ": cancelling command op " << tid << dendl; + cancel_ops.push_back(tid); + if (op.outs) { + std::ostringstream ss; + ss << "MDS " << op_mds_gid << " went away"; + *(op.outs) = ss.str(); + } + /* + * No need to make the con->mark_down under + * client_lock here, because the con will + * has its own lock. + */ + op.con->mark_down(); + if (op.on_finish) + op.on_finish->complete(-CEPHFS_ETIMEDOUT); + } + } + + for (const auto &tid : cancel_ops) + command_table.erase(tid); +} + +void Client::handle_mds_map(const MConstRef<MMDSMap>& m) +{ + std::unique_lock cl(client_lock); + if (m->get_epoch() <= mdsmap->get_epoch()) { + ldout(cct, 1) << __func__ << " epoch " << m->get_epoch() + << " is identical to or older than our " + << mdsmap->get_epoch() << dendl; + return; + } + + cl.unlock(); + ldout(cct, 1) << __func__ << " epoch " << m->get_epoch() << dendl; + std::unique_ptr<MDSMap> _mdsmap(new MDSMap); + _mdsmap->decode(m->get_encoded()); + cancel_commands(*_mdsmap.get()); + cl.lock(); + + _mdsmap.swap(mdsmap); + + // reset session + for (auto p = mds_sessions.begin(); p != mds_sessions.end(); ) { + mds_rank_t mds = p->first; + MetaSessionRef session = p->second; + ++p; + + int oldstate = _mdsmap->get_state(mds); + int newstate = mdsmap->get_state(mds); + if (!mdsmap->is_up(mds)) { + session->con->mark_down(); + } else if (mdsmap->get_addrs(mds) != session->addrs) { + auto old_inc = _mdsmap->get_incarnation(mds); + auto new_inc = mdsmap->get_incarnation(mds); + if (old_inc != new_inc) { + ldout(cct, 1) << "mds incarnation changed from " + << old_inc << " to " << new_inc << dendl; + oldstate = MDSMap::STATE_NULL; + } + session->con->mark_down(); + session->addrs = mdsmap->get_addrs(mds); + // When new MDS starts to take over, notify kernel to trim unused entries + // in its dcache/icache. Hopefully, the kernel will release some unused + // inodes before the new MDS enters reconnect state. + trim_cache_for_reconnect(session.get()); + } else if (oldstate == newstate) + continue; // no change + + session->mds_state = newstate; + if (newstate == MDSMap::STATE_RECONNECT) { + session->con = messenger->connect_to_mds(session->addrs); + send_reconnect(session.get()); + } else if (newstate > MDSMap::STATE_RECONNECT) { + if (oldstate < MDSMap::STATE_RECONNECT) { + ldout(cct, 1) << "we may miss the MDSMap::RECONNECT, close mds session ... " << dendl; + _closed_mds_session(session.get()); + continue; + } + if (newstate >= MDSMap::STATE_ACTIVE) { + if (oldstate < MDSMap::STATE_ACTIVE) { + // kick new requests + kick_requests(session.get()); + kick_flushing_caps(session.get()); + signal_context_list(session->waiting_for_open); + wake_up_session_caps(session.get(), true); + } + connect_mds_targets(mds); + } + } else if (newstate == MDSMap::STATE_NULL && + mds >= mdsmap->get_max_mds()) { + _closed_mds_session(session.get()); + } + } + + // kick any waiting threads + signal_cond_list(waiting_for_mdsmap); + + monclient->sub_got("mdsmap", mdsmap->get_epoch()); +} + +void Client::send_reconnect(MetaSession *session) +{ + mds_rank_t mds = session->mds_num; + ldout(cct, 10) << __func__ << " to mds." << mds << dendl; + + // trim unused caps to reduce MDS's cache rejoin time + trim_cache_for_reconnect(session); + + session->readonly = false; + + session->release.reset(); + + // reset my cap seq number + session->seq = 0; + //connect to the mds' offload targets + connect_mds_targets(mds); + //make sure unsafe requests get saved + resend_unsafe_requests(session); + + early_kick_flushing_caps(session); + + auto m = make_message<MClientReconnect>(); + bool allow_multi = session->mds_features.test(CEPHFS_FEATURE_MULTI_RECONNECT); + + // i have an open session. + ceph::unordered_set<inodeno_t> did_snaprealm; + for (ceph::unordered_map<vinodeno_t, Inode*>::iterator p = inode_map.begin(); + p != inode_map.end(); + ++p) { + Inode *in = p->second; + auto it = in->caps.find(mds); + if (it != in->caps.end()) { + if (allow_multi && + m->get_approx_size() >= + static_cast<size_t>((std::numeric_limits<int>::max() >> 1))) { + m->mark_more(); + session->con->send_message2(std::move(m)); + + m = make_message<MClientReconnect>(); + } + + Cap &cap = it->second; + ldout(cct, 10) << " caps on " << p->first + << " " << ccap_string(cap.issued) + << " wants " << ccap_string(in->caps_wanted()) + << dendl; + filepath path; + in->make_short_path(path); + ldout(cct, 10) << " path " << path << dendl; + + bufferlist flockbl; + _encode_filelocks(in, flockbl); + + cap.seq = 0; // reset seq. + cap.issue_seq = 0; // reset seq. + cap.mseq = 0; // reset seq. + // cap gen should catch up with session cap_gen + if (cap.gen < session->cap_gen) { + cap.gen = session->cap_gen; + cap.issued = cap.implemented = CEPH_CAP_PIN; + } else { + cap.issued = cap.implemented; + } + snapid_t snap_follows = 0; + if (!in->cap_snaps.empty()) + snap_follows = in->cap_snaps.begin()->first; + + m->add_cap(p->first.ino, + cap.cap_id, + path.get_ino(), path.get_path(), // ino + in->caps_wanted(), // wanted + cap.issued, // issued + in->snaprealm->ino, + snap_follows, + flockbl); + + if (did_snaprealm.count(in->snaprealm->ino) == 0) { + ldout(cct, 10) << " snaprealm " << *in->snaprealm << dendl; + m->add_snaprealm(in->snaprealm->ino, in->snaprealm->seq, in->snaprealm->parent); + did_snaprealm.insert(in->snaprealm->ino); + } + } + } + + if (!allow_multi) + m->set_encoding_version(0); // use connection features to choose encoding + session->con->send_message2(std::move(m)); + + mount_cond.notify_all(); + + if (session->reclaim_state == MetaSession::RECLAIMING) + signal_cond_list(waiting_for_reclaim); +} + + +void Client::kick_requests(MetaSession *session) +{ + ldout(cct, 10) << __func__ << " for mds." << session->mds_num << dendl; + for (map<ceph_tid_t, MetaRequest*>::iterator p = mds_requests.begin(); + p != mds_requests.end(); + ++p) { + MetaRequest *req = p->second; + if (req->got_unsafe) + continue; + if (req->aborted()) { + if (req->caller_cond) { + req->kick = true; + req->caller_cond->notify_all(); + } + continue; + } + if (req->retry_attempt > 0) + continue; // new requests only + if (req->mds == session->mds_num) { + send_request(p->second, session); + } + } +} + +void Client::resend_unsafe_requests(MetaSession *session) +{ + for (xlist<MetaRequest*>::iterator iter = session->unsafe_requests.begin(); + !iter.end(); + ++iter) + send_request(*iter, session); + + // also re-send old requests when MDS enters reconnect stage. So that MDS can + // process completed requests in clientreplay stage. + for (map<ceph_tid_t, MetaRequest*>::iterator p = mds_requests.begin(); + p != mds_requests.end(); + ++p) { + MetaRequest *req = p->second; + if (req->got_unsafe) + continue; + if (req->aborted()) + continue; + if (req->retry_attempt == 0) + continue; // old requests only + if (req->mds == session->mds_num) + send_request(req, session, true); + } +} + +void Client::wait_unsafe_requests() +{ + list<MetaRequest*> last_unsafe_reqs; + for (const auto &p : mds_sessions) { + const auto s = p.second; + if (!s->unsafe_requests.empty()) { + MetaRequest *req = s->unsafe_requests.back(); + req->get(); + last_unsafe_reqs.push_back(req); + } + } + + for (list<MetaRequest*>::iterator p = last_unsafe_reqs.begin(); + p != last_unsafe_reqs.end(); + ++p) { + MetaRequest *req = *p; + if (req->unsafe_item.is_on_list()) + wait_on_list(req->waitfor_safe); + put_request(req); + } +} + +void Client::kick_requests_closed(MetaSession *session) +{ + ldout(cct, 10) << __func__ << " for mds." << session->mds_num << dendl; + for (map<ceph_tid_t, MetaRequest*>::iterator p = mds_requests.begin(); + p != mds_requests.end(); ) { + MetaRequest *req = p->second; + ++p; + if (req->mds == session->mds_num) { + if (req->caller_cond) { + req->kick = true; + req->caller_cond->notify_all(); + } + req->item.remove_myself(); + if (req->got_unsafe) { + lderr(cct) << __func__ << " removing unsafe request " << req->get_tid() << dendl; + req->unsafe_item.remove_myself(); + if (is_dir_operation(req)) { + Inode *dir = req->inode(); + ceph_assert(dir); + dir->set_async_err(-CEPHFS_EIO); + lderr(cct) << "kick_requests_closed drop req of inode(dir) : " + << dir->ino << " " << req->get_tid() << dendl; + req->unsafe_dir_item.remove_myself(); + } + if (req->target) { + InodeRef &in = req->target; + in->set_async_err(-CEPHFS_EIO); + lderr(cct) << "kick_requests_closed drop req of inode : " + << in->ino << " " << req->get_tid() << dendl; + req->unsafe_target_item.remove_myself(); + } + signal_cond_list(req->waitfor_safe); + unregister_request(req); + } + } + } + ceph_assert(session->requests.empty()); + ceph_assert(session->unsafe_requests.empty()); +} + + + + +/************ + * leases + */ + +void Client::got_mds_push(MetaSession *s) +{ + s->seq++; + ldout(cct, 10) << " mds." << s->mds_num << " seq now " << s->seq << dendl; + if (s->state == MetaSession::STATE_CLOSING) { + s->con->send_message2(make_message<MClientSession>(CEPH_SESSION_REQUEST_CLOSE, s->seq)); + } +} + +void Client::handle_lease(const MConstRef<MClientLease>& m) +{ + ldout(cct, 10) << __func__ << " " << *m << dendl; + + ceph_assert(m->get_action() == CEPH_MDS_LEASE_REVOKE); + mds_rank_t mds = mds_rank_t(m->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds, m->get_connection().get()); + if (!session) { + return; + } + + got_mds_push(session.get()); + + ceph_seq_t seq = m->get_seq(); + + Inode *in; + vinodeno_t vino(m->get_ino(), CEPH_NOSNAP); + if (inode_map.count(vino) == 0) { + ldout(cct, 10) << " don't have vino " << vino << dendl; + goto revoke; + } + in = inode_map[vino]; + + if (m->get_mask() & CEPH_LEASE_VALID) { + if (!in->dir || in->dir->dentries.count(m->dname) == 0) { + ldout(cct, 10) << " don't have dir|dentry " << m->get_ino() << "/" << m->dname <<dendl; + goto revoke; + } + Dentry *dn = in->dir->dentries[m->dname]; + ldout(cct, 10) << " revoked DN lease on " << dn << dendl; + dn->lease_mds = -1; + } + + revoke: + { + auto reply = make_message<MClientLease>(CEPH_MDS_LEASE_RELEASE, seq, + m->get_mask(), m->get_ino(), + m->get_first(), m->get_last(), m->dname); + m->get_connection()->send_message2(std::move(reply)); + } +} + +void Client::_put_inode(Inode *in, int n) +{ + ldout(cct, 10) << __func__ << " on " << *in << " n = " << n << dendl; + + int left = in->get_nref(); + ceph_assert(left >= n + 1); + in->iput(n); + left -= n; + if (left == 1) { // the last one will be held by the inode_map + // release any caps + remove_all_caps(in); + + ldout(cct, 10) << __func__ << " deleting " << *in << dendl; + bool unclean = objectcacher->release_set(&in->oset); + ceph_assert(!unclean); + inode_map.erase(in->vino()); + if (use_faked_inos()) + _release_faked_ino(in); + + if (root == nullptr) { + root_ancestor = 0; + while (!root_parents.empty()) + root_parents.erase(root_parents.begin()); + } + + in->iput(); + } +} + +void Client::delay_put_inodes(bool wakeup) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + std::map<Inode*,int> release; + { + std::scoped_lock dl(delay_i_lock); + release.swap(delay_i_release); + } + + if (release.empty()) + return; + + for (auto &[in, cnt] : release) + _put_inode(in, cnt); + + if (wakeup) + mount_cond.notify_all(); +} + +void Client::put_inode(Inode *in, int n) +{ + ldout(cct, 20) << __func__ << " on " << *in << " n = " << n << dendl; + + std::scoped_lock dl(delay_i_lock); + delay_i_release[in] += n; +} + +void Client::close_dir(Dir *dir) +{ + Inode *in = dir->parent_inode; + ldout(cct, 15) << __func__ << " dir " << dir << " on " << in << dendl; + ceph_assert(dir->is_empty()); + ceph_assert(in->dir == dir); + ceph_assert(in->dentries.size() < 2); // dirs can't be hard-linked + if (!in->dentries.empty()) + in->get_first_parent()->put(); // unpin dentry + + delete in->dir; + in->dir = 0; + put_inode(in); // unpin inode +} + + /** + * Don't call this with in==NULL, use get_or_create for that + * leave dn set to default NULL unless you're trying to add + * a new inode to a pre-created Dentry + */ +Dentry* Client::link(Dir *dir, const string& name, Inode *in, Dentry *dn) +{ + if (!dn) { + // create a new Dentry + dn = new Dentry(dir, name); + + lru.lru_insert_mid(dn); // mid or top? + + if(in) { + ldout(cct, 15) << "link dir " << *dir->parent_inode << " '" << name << "' to inode " << *in + << " dn " << *dn << " (new dn)" << dendl; + } else { + ldout(cct, 15) << "link dir " << *dir->parent_inode << " '" << name << "' " + << " dn " << *dn << " (new dn)" << dendl; + } + } else { + ceph_assert(!dn->inode); + ldout(cct, 15) << "link dir " << *dir->parent_inode << " '" << name << "' to inode " << in + << " dn " << *dn << " (old dn)" << dendl; + } + + if (in) { // link to inode + InodeRef tmp_ref; + // only one parent for directories! + if (in->is_dir() && !in->dentries.empty()) { + tmp_ref = in; // prevent unlink below from freeing the inode. + Dentry *olddn = in->get_first_parent(); + ceph_assert(olddn->dir != dir || olddn->name != name); + Inode *old_diri = olddn->dir->parent_inode; + clear_dir_complete_and_ordered(old_diri, true); + unlink(olddn, true, true); // keep dir, dentry + } + + dn->link(in); + inc_dentry_nr(); + ldout(cct, 20) << "link inode " << in << " parents now " << in->dentries << dendl; + } + + return dn; +} + +void Client::unlink(Dentry *dn, bool keepdir, bool keepdentry) +{ + InodeRef in(dn->inode); + ldout(cct, 15) << "unlink dir " << dn->dir->parent_inode << " '" << dn->name << "' dn " << dn + << " inode " << dn->inode << dendl; + + // unlink from inode + if (dn->inode) { + dn->unlink(); + dec_dentry_nr(); + ldout(cct, 20) << "unlink inode " << in << " parents now " << in->dentries << dendl; + } + + if (keepdentry) { + dn->lease_mds = -1; + } else { + ldout(cct, 15) << "unlink removing '" << dn->name << "' dn " << dn << dendl; + + // unlink from dir + Dir *dir = dn->dir; + dn->detach(); + + // delete den + lru.lru_remove(dn); + dn->put(); + + if (dir->is_empty() && !keepdir) + close_dir(dir); + } +} + +/** + * For asynchronous flushes, check for errors from the IO and + * update the inode if necessary + */ +class C_Client_FlushComplete : public Context { +private: + Client *client; + InodeRef inode; +public: + C_Client_FlushComplete(Client *c, Inode *in) : client(c), inode(in) { } + void finish(int r) override { + ceph_assert(ceph_mutex_is_locked_by_me(client->client_lock)); + if (r != 0) { + client_t const whoami = client->whoami; // For the benefit of ldout prefix + ldout(client->cct, 1) << "I/O error from flush on inode " << inode + << " 0x" << std::hex << inode->ino << std::dec + << ": " << r << "(" << cpp_strerror(r) << ")" << dendl; + inode->set_async_err(r); + } + } +}; + + +/**** + * caps + */ + +void Client::get_cap_ref(Inode *in, int cap) +{ + if ((cap & CEPH_CAP_FILE_BUFFER) && + in->cap_refs[CEPH_CAP_FILE_BUFFER] == 0) { + ldout(cct, 5) << __func__ << " got first FILE_BUFFER ref on " << *in << dendl; + in->iget(); + } + if ((cap & CEPH_CAP_FILE_CACHE) && + in->cap_refs[CEPH_CAP_FILE_CACHE] == 0) { + ldout(cct, 5) << __func__ << " got first FILE_CACHE ref on " << *in << dendl; + in->iget(); + } + in->get_cap_ref(cap); +} + +void Client::put_cap_ref(Inode *in, int cap) +{ + int last = in->put_cap_ref(cap); + if (last) { + int put_nref = 0; + int drop = last & ~in->caps_issued(); + if (in->snapid == CEPH_NOSNAP) { + if ((last & CEPH_CAP_FILE_WR) && + !in->cap_snaps.empty() && + in->cap_snaps.rbegin()->second.writing) { + ldout(cct, 10) << __func__ << " finishing pending cap_snap on " << *in << dendl; + in->cap_snaps.rbegin()->second.writing = 0; + finish_cap_snap(in, in->cap_snaps.rbegin()->second, get_caps_used(in)); + signal_cond_list(in->waitfor_caps); // wake up blocked sync writers + } + if (last & CEPH_CAP_FILE_BUFFER) { + for (auto &p : in->cap_snaps) + p.second.dirty_data = 0; + signal_cond_list(in->waitfor_commit); + ldout(cct, 5) << __func__ << " dropped last FILE_BUFFER ref on " << *in << dendl; + ++put_nref; + + if (!in->cap_snaps.empty()) { + flush_snaps(in); + } + } + } + if (last & CEPH_CAP_FILE_CACHE) { + ldout(cct, 5) << __func__ << " dropped last FILE_CACHE ref on " << *in << dendl; + ++put_nref; + } + if (drop) + check_caps(in, 0); + if (put_nref) + put_inode(in, put_nref); + } +} + +// get caps for a given file handle -- the inode should have @need caps +// issued by the mds and @want caps not revoked (or not under revocation). +// this routine blocks till the cap requirement is satisfied. also account +// (track) for capability hit when required (when cap requirement succeedes). +int Client::get_caps(Fh *fh, int need, int want, int *phave, loff_t endoff) +{ + Inode *in = fh->inode.get(); + + int r = check_pool_perm(in, need); + if (r < 0) + return r; + + while (1) { + int file_wanted = in->caps_file_wanted(); + if ((file_wanted & need) != need) { + ldout(cct, 10) << "get_caps " << *in << " need " << ccap_string(need) + << " file_wanted " << ccap_string(file_wanted) << ", EBADF " + << dendl; + return -CEPHFS_EBADF; + } + + if ((fh->mode & CEPH_FILE_MODE_WR) && fh->gen != fd_gen) + return -CEPHFS_EBADF; + + if ((in->flags & I_ERROR_FILELOCK) && fh->has_any_filelocks()) + return -CEPHFS_EIO; + + int implemented; + int have = in->caps_issued(&implemented); + + bool waitfor_caps = false; + bool waitfor_commit = false; + + if (have & need & CEPH_CAP_FILE_WR) { + if (endoff > 0) { + if ((endoff >= (loff_t)in->max_size || + endoff > (loff_t)(in->size << 1)) && + endoff > (loff_t)in->wanted_max_size) { + ldout(cct, 10) << "wanted_max_size " << in->wanted_max_size << " -> " << endoff << dendl; + in->wanted_max_size = endoff; + } + if (in->wanted_max_size > in->max_size && + in->wanted_max_size > in->requested_max_size) + check_caps(in, 0); + } + + if (endoff >= 0 && endoff > (loff_t)in->max_size) { + ldout(cct, 10) << "waiting on max_size, endoff " << endoff << " max_size " << in->max_size << " on " << *in << dendl; + waitfor_caps = true; + } + if (!in->cap_snaps.empty()) { + if (in->cap_snaps.rbegin()->second.writing) { + ldout(cct, 10) << "waiting on cap_snap write to complete" << dendl; + waitfor_caps = true; + } + for (auto &p : in->cap_snaps) { + if (p.second.dirty_data) { + waitfor_commit = true; + break; + } + } + if (waitfor_commit) { + _flush(in, new C_Client_FlushComplete(this, in)); + ldout(cct, 10) << "waiting for WRBUFFER to get dropped" << dendl; + } + } + } + + if (!waitfor_caps && !waitfor_commit) { + if ((have & need) == need) { + int revoking = implemented & ~have; + ldout(cct, 10) << "get_caps " << *in << " have " << ccap_string(have) + << " need " << ccap_string(need) << " want " << ccap_string(want) + << " revoking " << ccap_string(revoking) + << dendl; + if ((revoking & want) == 0) { + *phave = need | (have & want); + in->get_cap_ref(need); + cap_hit(); + return 0; + } + } + ldout(cct, 10) << "waiting for caps " << *in << " need " << ccap_string(need) << " want " << ccap_string(want) << dendl; + waitfor_caps = true; + } + + if ((need & CEPH_CAP_FILE_WR) && + ((in->auth_cap && in->auth_cap->session->readonly) || + // userland clients are only allowed to read if fscrypt enabled + in->is_fscrypt_enabled())) + return -CEPHFS_EROFS; + + if (in->flags & I_CAP_DROPPED) { + int mds_wanted = in->caps_mds_wanted(); + if ((mds_wanted & need) != need) { + int ret = _renew_caps(in); + if (ret < 0) + return ret; + continue; + } + if (!(file_wanted & ~mds_wanted)) + in->flags &= ~I_CAP_DROPPED; + } + + if (waitfor_caps) + wait_on_list(in->waitfor_caps); + else if (waitfor_commit) + wait_on_list(in->waitfor_commit); + } +} + +int Client::get_caps_used(Inode *in) +{ + unsigned used = in->caps_used(); + if (!(used & CEPH_CAP_FILE_CACHE) && + !objectcacher->set_is_empty(&in->oset)) + used |= CEPH_CAP_FILE_CACHE; + return used; +} + +void Client::cap_delay_requeue(Inode *in) +{ + ldout(cct, 10) << __func__ << " on " << *in << dendl; + + in->hold_caps_until = ceph::coarse_mono_clock::now() + caps_release_delay; + delayed_list.push_back(&in->delay_cap_item); +} + +void Client::send_cap(Inode *in, MetaSession *session, Cap *cap, + int flags, int used, int want, int retain, + int flush, ceph_tid_t flush_tid) +{ + int held = cap->issued | cap->implemented; + int revoking = cap->implemented & ~cap->issued; + retain &= ~revoking; + int dropping = cap->issued & ~retain; + int op = CEPH_CAP_OP_UPDATE; + + ldout(cct, 10) << __func__ << " " << *in + << " mds." << session->mds_num << " seq " << cap->seq + << " used " << ccap_string(used) + << " want " << ccap_string(want) + << " flush " << ccap_string(flush) + << " retain " << ccap_string(retain) + << " held "<< ccap_string(held) + << " revoking " << ccap_string(revoking) + << " dropping " << ccap_string(dropping) + << dendl; + + if (cct->_conf->client_inject_release_failure && revoking) { + const int would_have_issued = cap->issued & retain; + const int would_have_implemented = cap->implemented & (cap->issued | used); + // Simulated bug: + // - tell the server we think issued is whatever they issued plus whatever we implemented + // - leave what we have implemented in place + ldout(cct, 20) << __func__ << " injecting failure to release caps" << dendl; + cap->issued = cap->issued | cap->implemented; + + // Make an exception for revoking xattr caps: we are injecting + // failure to release other caps, but allow xattr because client + // will block on xattr ops if it can't release these to MDS (#9800) + const int xattr_mask = CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; + cap->issued ^= xattr_mask & revoking; + cap->implemented ^= xattr_mask & revoking; + + ldout(cct, 20) << __func__ << " issued " << ccap_string(cap->issued) << " vs " << ccap_string(would_have_issued) << dendl; + ldout(cct, 20) << __func__ << " implemented " << ccap_string(cap->implemented) << " vs " << ccap_string(would_have_implemented) << dendl; + } else { + // Normal behaviour + cap->issued &= retain; + cap->implemented &= cap->issued | used; + } + + snapid_t follows = 0; + + if (flush) + follows = in->snaprealm->get_snap_context().seq; + + auto m = make_message<MClientCaps>(op, + in->ino, + 0, + cap->cap_id, cap->seq, + cap->implemented, + want, + flush, + cap->mseq, + cap_epoch_barrier); + m->caller_uid = in->cap_dirtier_uid; + m->caller_gid = in->cap_dirtier_gid; + + m->head.issue_seq = cap->issue_seq; + m->set_tid(flush_tid); + + m->head.uid = in->uid; + m->head.gid = in->gid; + m->head.mode = in->mode; + + m->head.nlink = in->nlink; + + if (flush & CEPH_CAP_XATTR_EXCL) { + encode(in->xattrs, m->xattrbl); + m->head.xattr_version = in->xattr_version; + } + + m->size = in->size; + m->max_size = in->max_size; + m->truncate_seq = in->truncate_seq; + m->truncate_size = in->truncate_size; + m->mtime = in->mtime; + m->atime = in->atime; + m->ctime = in->ctime; + m->btime = in->btime; + m->time_warp_seq = in->time_warp_seq; + m->change_attr = in->change_attr; + m->fscrypt_auth = in->fscrypt_auth; + m->fscrypt_file = in->fscrypt_file; + + if (!(flags & MClientCaps::FLAG_PENDING_CAPSNAP) && + !in->cap_snaps.empty() && + in->cap_snaps.rbegin()->second.flush_tid == 0) + flags |= MClientCaps::FLAG_PENDING_CAPSNAP; + m->flags = flags; + + if (flush & CEPH_CAP_FILE_WR) { + m->inline_version = in->inline_version; + m->inline_data = in->inline_data; + } + + in->reported_size = in->size; + m->set_snap_follows(follows); + cap->wanted = want; + if (cap == in->auth_cap) { + if (want & CEPH_CAP_ANY_FILE_WR) { + m->set_max_size(in->wanted_max_size); + in->requested_max_size = in->wanted_max_size; + ldout(cct, 15) << "auth cap, requesting max_size " << in->requested_max_size << dendl; + } else { + in->requested_max_size = 0; + ldout(cct, 15) << "auth cap, reset requested_max_size due to not wanting any file write cap" << dendl; + } + } + + if (!session->flushing_caps_tids.empty()) + m->set_oldest_flush_tid(*session->flushing_caps_tids.begin()); + + session->con->send_message2(std::move(m)); +} + +static bool is_max_size_approaching(Inode *in) +{ + /* mds will adjust max size according to the reported size */ + if (in->flushing_caps & CEPH_CAP_FILE_WR) + return false; + if (in->size >= in->max_size) + return true; + /* half of previous max_size increment has been used */ + if (in->max_size > in->reported_size && + (in->size << 1) >= in->max_size + in->reported_size) + return true; + return false; +} + +static int adjust_caps_used_for_lazyio(int used, int issued, int implemented) +{ + if (!(used & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_BUFFER))) + return used; + if (!(implemented & CEPH_CAP_FILE_LAZYIO)) + return used; + + if (issued & CEPH_CAP_FILE_LAZYIO) { + if (!(issued & CEPH_CAP_FILE_CACHE)) { + used &= ~CEPH_CAP_FILE_CACHE; + used |= CEPH_CAP_FILE_LAZYIO; + } + if (!(issued & CEPH_CAP_FILE_BUFFER)) { + used &= ~CEPH_CAP_FILE_BUFFER; + used |= CEPH_CAP_FILE_LAZYIO; + } + } else { + if (!(implemented & CEPH_CAP_FILE_CACHE)) { + used &= ~CEPH_CAP_FILE_CACHE; + used |= CEPH_CAP_FILE_LAZYIO; + } + if (!(implemented & CEPH_CAP_FILE_BUFFER)) { + used &= ~CEPH_CAP_FILE_BUFFER; + used |= CEPH_CAP_FILE_LAZYIO; + } + } + return used; +} + +/** + * check_caps + * + * Examine currently used and wanted versus held caps. Release, flush or ack + * revoked caps to the MDS as appropriate. + * + * @param in the inode to check + * @param flags flags to apply to cap check + */ +void Client::check_caps(Inode *in, unsigned flags) +{ + unsigned wanted = in->caps_wanted(); + unsigned used = get_caps_used(in); + unsigned cap_used; + + int implemented; + int issued = in->caps_issued(&implemented); + int revoking = implemented & ~issued; + + int orig_used = used; + used = adjust_caps_used_for_lazyio(used, issued, implemented); + + int retain = wanted | used | CEPH_CAP_PIN; + if (!is_unmounting() && in->nlink > 0) { + if (wanted) { + retain |= CEPH_CAP_ANY; + } else if (in->is_dir() && + (issued & CEPH_CAP_FILE_SHARED) && + (in->flags & I_COMPLETE)) { + // we do this here because we don't want to drop to Fs (and then + // drop the Fs if we do a create!) if that alone makes us send lookups + // to the MDS. Doing it in in->caps_wanted() has knock-on effects elsewhere + wanted = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL; + retain |= wanted; + } else { + retain |= CEPH_CAP_ANY_SHARED; + // keep RD only if we didn't have the file open RW, + // because then the mds would revoke it anyway to + // journal max_size=0. + if (in->max_size == 0) + retain |= CEPH_CAP_ANY_RD; + } + } + + ldout(cct, 10) << __func__ << " on " << *in + << " wanted " << ccap_string(wanted) + << " used " << ccap_string(used) + << " issued " << ccap_string(issued) + << " revoking " << ccap_string(revoking) + << " flags=" << flags + << dendl; + + if (in->snapid != CEPH_NOSNAP) + return; //snap caps last forever, can't write + + if (in->caps.empty()) + return; // guard if at end of func + + if (!(orig_used & CEPH_CAP_FILE_BUFFER) && + (revoking & used & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO))) { + if (_release(in)) + used &= ~(CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO); + } + + for (auto &[mds, cap] : in->caps) { + auto session = mds_sessions.at(mds); + + cap_used = used; + if (in->auth_cap && &cap != in->auth_cap) + cap_used &= ~in->auth_cap->issued; + + revoking = cap.implemented & ~cap.issued; + + ldout(cct, 10) << " cap mds." << mds + << " issued " << ccap_string(cap.issued) + << " implemented " << ccap_string(cap.implemented) + << " revoking " << ccap_string(revoking) << dendl; + + if (in->wanted_max_size > in->max_size && + in->wanted_max_size > in->requested_max_size && + &cap == in->auth_cap) + goto ack; + + /* approaching file_max? */ + if ((cap.issued & CEPH_CAP_FILE_WR) && + &cap == in->auth_cap && + is_max_size_approaching(in)) { + ldout(cct, 10) << "size " << in->size << " approaching max_size " << in->max_size + << ", reported " << in->reported_size << dendl; + goto ack; + } + + /* completed revocation? */ + if (revoking && (revoking & cap_used) == 0) { + ldout(cct, 10) << "completed revocation of " << ccap_string(cap.implemented & ~cap.issued) << dendl; + goto ack; + } + + /* want more caps from mds? */ + if (wanted & ~(cap.wanted | cap.issued)) + goto ack; + + if (!revoking && is_unmounting() && (cap_used == 0)) + goto ack; + + if ((cap.issued & ~retain) == 0 && // and we don't have anything we wouldn't like + !in->dirty_caps) // and we have no dirty caps + continue; + + if (!(flags & CHECK_CAPS_NODELAY)) { + ldout(cct, 10) << "delaying cap release" << dendl; + cap_delay_requeue(in); + continue; + } + + ack: + if (&cap == in->auth_cap) { + if (in->flags & I_KICK_FLUSH) { + ldout(cct, 20) << " reflushing caps (check_caps) on " << *in + << " to mds." << mds << dendl; + kick_flushing_caps(in, session.get()); + } + if (!in->cap_snaps.empty() && + in->cap_snaps.rbegin()->second.flush_tid == 0) + flush_snaps(in); + } + + int flushing; + int msg_flags = 0; + ceph_tid_t flush_tid; + if (in->auth_cap == &cap && in->dirty_caps) { + flushing = mark_caps_flushing(in, &flush_tid); + if (flags & CHECK_CAPS_SYNCHRONOUS) + msg_flags |= MClientCaps::FLAG_SYNC; + } else { + flushing = 0; + flush_tid = 0; + } + + in->delay_cap_item.remove_myself(); + send_cap(in, session.get(), &cap, msg_flags, cap_used, wanted, retain, + flushing, flush_tid); + } +} + + +void Client::queue_cap_snap(Inode *in, SnapContext& old_snapc) +{ + int used = get_caps_used(in); + int dirty = in->caps_dirty(); + ldout(cct, 10) << __func__ << " " << *in << " snapc " << old_snapc << " used " << ccap_string(used) << dendl; + + if (in->cap_snaps.size() && + in->cap_snaps.rbegin()->second.writing) { + ldout(cct, 10) << __func__ << " already have pending cap_snap on " << *in << dendl; + return; + } else if (dirty || (used & CEPH_CAP_FILE_WR)) { + const auto &capsnapem = in->cap_snaps.emplace(std::piecewise_construct, std::make_tuple(old_snapc.seq), std::make_tuple(in)); + ceph_assert(capsnapem.second); /* element inserted */ + CapSnap &capsnap = capsnapem.first->second; + capsnap.context = old_snapc; + capsnap.issued = in->caps_issued(); + capsnap.dirty = dirty; + + capsnap.dirty_data = (used & CEPH_CAP_FILE_BUFFER); + + capsnap.uid = in->uid; + capsnap.gid = in->gid; + capsnap.mode = in->mode; + capsnap.btime = in->btime; + capsnap.xattrs = in->xattrs; + capsnap.xattr_version = in->xattr_version; + capsnap.cap_dirtier_uid = in->cap_dirtier_uid; + capsnap.cap_dirtier_gid = in->cap_dirtier_gid; + + if (used & CEPH_CAP_FILE_WR) { + ldout(cct, 10) << __func__ << " WR used on " << *in << dendl; + capsnap.writing = 1; + } else { + finish_cap_snap(in, capsnap, used); + } + } else { + ldout(cct, 10) << __func__ << " not dirty|writing on " << *in << dendl; + } +} + +void Client::finish_cap_snap(Inode *in, CapSnap &capsnap, int used) +{ + ldout(cct, 10) << __func__ << " " << *in << " capsnap " << (void *)&capsnap << " used " << ccap_string(used) << dendl; + capsnap.size = in->size; + capsnap.mtime = in->mtime; + capsnap.atime = in->atime; + capsnap.ctime = in->ctime; + capsnap.time_warp_seq = in->time_warp_seq; + capsnap.change_attr = in->change_attr; + capsnap.dirty |= in->caps_dirty(); + + /* Only reset it if it wasn't set before */ + if (capsnap.cap_dirtier_uid == -1) { + capsnap.cap_dirtier_uid = in->cap_dirtier_uid; + capsnap.cap_dirtier_gid = in->cap_dirtier_gid; + } + + if (capsnap.dirty & CEPH_CAP_FILE_WR) { + capsnap.inline_data = in->inline_data; + capsnap.inline_version = in->inline_version; + } + + if (used & CEPH_CAP_FILE_BUFFER) { + ldout(cct, 10) << __func__ << " " << *in << " cap_snap " << &capsnap << " used " << used + << " WRBUFFER, trigger to flush dirty buffer" << dendl; + + /* trigger to flush the buffer */ + _flush(in, new C_Client_FlushComplete(this, in)); + } else { + capsnap.dirty_data = 0; + flush_snaps(in); + } +} + +void Client::send_flush_snap(Inode *in, MetaSession *session, + snapid_t follows, CapSnap& capsnap) +{ + auto m = make_message<MClientCaps>(CEPH_CAP_OP_FLUSHSNAP, + in->ino, in->snaprealm->ino, 0, + in->auth_cap->mseq, cap_epoch_barrier); + m->caller_uid = capsnap.cap_dirtier_uid; + m->caller_gid = capsnap.cap_dirtier_gid; + + m->set_client_tid(capsnap.flush_tid); + m->head.snap_follows = follows; + + m->head.caps = capsnap.issued; + m->head.dirty = capsnap.dirty; + + m->head.uid = capsnap.uid; + m->head.gid = capsnap.gid; + m->head.mode = capsnap.mode; + m->btime = capsnap.btime; + + m->size = capsnap.size; + + m->head.xattr_version = capsnap.xattr_version; + encode(capsnap.xattrs, m->xattrbl); + + m->ctime = capsnap.ctime; + m->btime = capsnap.btime; + m->mtime = capsnap.mtime; + m->atime = capsnap.atime; + m->time_warp_seq = capsnap.time_warp_seq; + m->change_attr = capsnap.change_attr; + + if (capsnap.dirty & CEPH_CAP_FILE_WR) { + m->inline_version = in->inline_version; + m->inline_data = in->inline_data; + } + + ceph_assert(!session->flushing_caps_tids.empty()); + m->set_oldest_flush_tid(*session->flushing_caps_tids.begin()); + + session->con->send_message2(std::move(m)); +} + +void Client::flush_snaps(Inode *in) +{ + ldout(cct, 10) << "flush_snaps on " << *in << dendl; + ceph_assert(in->cap_snaps.size()); + + // pick auth mds + ceph_assert(in->auth_cap); + MetaSession *session = in->auth_cap->session; + + for (auto &p : in->cap_snaps) { + CapSnap &capsnap = p.second; + // only do new flush + if (capsnap.flush_tid > 0) + continue; + + ldout(cct, 10) << "flush_snaps mds." << session->mds_num + << " follows " << p.first + << " size " << capsnap.size + << " mtime " << capsnap.mtime + << " dirty_data=" << capsnap.dirty_data + << " writing=" << capsnap.writing + << " on " << *in << dendl; + if (capsnap.dirty_data || capsnap.writing) + break; + + capsnap.flush_tid = ++last_flush_tid; + session->flushing_caps_tids.insert(capsnap.flush_tid); + in->flushing_cap_tids[capsnap.flush_tid] = 0; + if (!in->flushing_cap_item.is_on_list()) + session->flushing_caps.push_back(&in->flushing_cap_item); + + send_flush_snap(in, session, p.first, capsnap); + } +} + +void Client::wait_on_list(list<ceph::condition_variable*>& ls) +{ + ceph::condition_variable cond; + ls.push_back(&cond); + std::unique_lock l{client_lock, std::adopt_lock}; + cond.wait(l); + l.release(); + ls.remove(&cond); +} + +void Client::signal_cond_list(list<ceph::condition_variable*>& ls) +{ + for (auto cond : ls) { + cond->notify_all(); + } +} + +void Client::wait_on_context_list(list<Context*>& ls) +{ + ceph::condition_variable cond; + bool done = false; + int r; + ls.push_back(new C_Cond(cond, &done, &r)); + std::unique_lock l{client_lock, std::adopt_lock}; + cond.wait(l, [&done] { return done;}); + l.release(); +} + +void Client::signal_context_list(list<Context*>& ls) +{ + while (!ls.empty()) { + ls.front()->complete(0); + ls.pop_front(); + } +} + +void Client::wake_up_session_caps(MetaSession *s, bool reconnect) +{ + for (const auto &cap : s->caps) { + auto &in = cap->inode; + if (reconnect) { + in.requested_max_size = 0; + in.wanted_max_size = 0; + } else { + if (cap->gen < s->cap_gen) { + // mds did not re-issue stale cap. + cap->issued = cap->implemented = CEPH_CAP_PIN; + // make sure mds knows what we want. + if (in.caps_file_wanted() & ~cap->wanted) + in.flags |= I_CAP_DROPPED; + } + } + signal_cond_list(in.waitfor_caps); + } +} + + +// flush dirty data (from objectcache) + +class C_Client_CacheInvalidate : public Context { +private: + Client *client; + vinodeno_t ino; + int64_t offset, length; +public: + C_Client_CacheInvalidate(Client *c, Inode *in, int64_t off, int64_t len) : + client(c), offset(off), length(len) { + if (client->use_faked_inos()) + ino = vinodeno_t(in->faked_ino, CEPH_NOSNAP); + else + ino = in->vino(); + } + void finish(int r) override { + // _async_invalidate takes the lock when it needs to, call this back from outside of lock. + ceph_assert(ceph_mutex_is_not_locked_by_me(client->client_lock)); + client->_async_invalidate(ino, offset, length); + } +}; + +void Client::_async_invalidate(vinodeno_t ino, int64_t off, int64_t len) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + ldout(cct, 10) << __func__ << " " << ino << " " << off << "~" << len << dendl; + ino_invalidate_cb(callback_handle, ino, off, len); +} + +void Client::_schedule_invalidate_callback(Inode *in, int64_t off, int64_t len) { + + if (ino_invalidate_cb) + // we queue the invalidate, which calls the callback and decrements the ref + async_ino_invalidator.queue(new C_Client_CacheInvalidate(this, in, off, len)); +} + +void Client::_invalidate_inode_cache(Inode *in) +{ + ldout(cct, 10) << __func__ << " " << *in << dendl; + + // invalidate our userspace inode cache + if (cct->_conf->client_oc) { + objectcacher->release_set(&in->oset); + if (!objectcacher->set_is_empty(&in->oset)) + lderr(cct) << "failed to invalidate cache for " << *in << dendl; + } + + _schedule_invalidate_callback(in, 0, 0); +} + +void Client::_invalidate_inode_cache(Inode *in, int64_t off, int64_t len) +{ + ldout(cct, 10) << __func__ << " " << *in << " " << off << "~" << len << dendl; + + // invalidate our userspace inode cache + if (cct->_conf->client_oc) { + vector<ObjectExtent> ls; + Striper::file_to_extents(cct, in->ino, &in->layout, off, len, in->truncate_size, ls); + objectcacher->discard_writeback(&in->oset, ls, nullptr); + } + + _schedule_invalidate_callback(in, off, len); +} + +bool Client::_release(Inode *in) +{ + ldout(cct, 20) << "_release " << *in << dendl; + if (in->cap_refs[CEPH_CAP_FILE_CACHE] == 0) { + _invalidate_inode_cache(in); + return true; + } + return false; +} + +bool Client::_flush(Inode *in, Context *onfinish) +{ + ldout(cct, 10) << "_flush " << *in << dendl; + + if (!in->oset.dirty_or_tx) { + ldout(cct, 10) << " nothing to flush" << dendl; + onfinish->complete(0); + return true; + } + + if (objecter->osdmap_pool_full(in->layout.pool_id)) { + ldout(cct, 8) << __func__ << ": FULL, purging for ENOSPC" << dendl; + objectcacher->purge_set(&in->oset); + if (onfinish) { + onfinish->complete(-CEPHFS_ENOSPC); + } + return true; + } + + return objectcacher->flush_set(&in->oset, onfinish); +} + +void Client::_flush_range(Inode *in, int64_t offset, uint64_t size) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + if (!in->oset.dirty_or_tx) { + ldout(cct, 10) << " nothing to flush" << dendl; + return; + } + + C_SaferCond onflush("Client::_flush_range flock"); + bool ret = objectcacher->file_flush(&in->oset, &in->layout, in->snaprealm->get_snap_context(), + offset, size, &onflush); + if (!ret) { + // wait for flush + client_lock.unlock(); + onflush.wait(); + client_lock.lock(); + } +} + +void Client::flush_set_callback(ObjectCacher::ObjectSet *oset) +{ + // std::scoped_lock l(client_lock); + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); // will be called via dispatch() -> objecter -> ... + Inode *in = static_cast<Inode *>(oset->parent); + ceph_assert(in); + _flushed(in); +} + +void Client::_flushed(Inode *in) +{ + ldout(cct, 10) << "_flushed " << *in << dendl; + + put_cap_ref(in, CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_BUFFER); +} + + + +// checks common to add_update_cap, handle_cap_grant +void Client::check_cap_issue(Inode *in, unsigned issued) +{ + unsigned had = in->caps_issued(); + + if ((issued & CEPH_CAP_FILE_CACHE) && + !(had & CEPH_CAP_FILE_CACHE)) + in->cache_gen++; + + if ((issued & CEPH_CAP_FILE_SHARED) != + (had & CEPH_CAP_FILE_SHARED)) { + if (issued & CEPH_CAP_FILE_SHARED) + in->shared_gen++; + if (in->is_dir()) + clear_dir_complete_and_ordered(in, true); + } +} + +void Client::add_update_cap(Inode *in, MetaSession *mds_session, uint64_t cap_id, + unsigned issued, unsigned wanted, unsigned seq, unsigned mseq, + inodeno_t realm, int flags, const UserPerm& cap_perms) +{ + if (!in->is_any_caps()) { + ceph_assert(in->snaprealm == 0); + in->snaprealm = get_snap_realm(realm); + in->snaprealm->inodes_with_caps.push_back(&in->snaprealm_item); + ldout(cct, 15) << __func__ << " first one, opened snaprealm " << in->snaprealm << dendl; + } else { + ceph_assert(in->snaprealm); + if ((flags & CEPH_CAP_FLAG_AUTH) && + realm != inodeno_t(-1) && in->snaprealm->ino != realm) { + in->snaprealm_item.remove_myself(); + auto oldrealm = in->snaprealm; + in->snaprealm = get_snap_realm(realm); + in->snaprealm->inodes_with_caps.push_back(&in->snaprealm_item); + put_snap_realm(oldrealm); + } + } + + mds_rank_t mds = mds_session->mds_num; + const auto &capem = in->caps.emplace(std::piecewise_construct, std::forward_as_tuple(mds), std::forward_as_tuple(*in, mds_session)); + Cap &cap = capem.first->second; + if (!capem.second) { + if (cap.gen < mds_session->cap_gen) + cap.issued = cap.implemented = CEPH_CAP_PIN; + + /* + * auth mds of the inode changed. we received the cap export + * message, but still haven't received the cap import message. + * handle_cap_export() updated the new auth MDS' cap. + * + * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing + * a message that was send before the cap import message. So + * don't remove caps. + */ + if (ceph_seq_cmp(seq, cap.seq) <= 0) { + if (&cap != in->auth_cap) + ldout(cct, 0) << "WARNING: " << "inode " << *in << " caps on mds." << mds << " != auth_cap." << dendl; + + ceph_assert(cap.cap_id == cap_id); + seq = cap.seq; + mseq = cap.mseq; + issued |= cap.issued; + flags |= CEPH_CAP_FLAG_AUTH; + } + } else { + inc_pinned_icaps(); + } + + check_cap_issue(in, issued); + + if (flags & CEPH_CAP_FLAG_AUTH) { + if (in->auth_cap != &cap && + (!in->auth_cap || ceph_seq_cmp(in->auth_cap->mseq, mseq) < 0)) { + if (in->auth_cap) { + if (in->flushing_cap_item.is_on_list()) { + ldout(cct, 10) << __func__ << " changing auth cap: " + << "add myself to new auth MDS' flushing caps list" << dendl; + adjust_session_flushing_caps(in, in->auth_cap->session, mds_session); + } + if (in->dirty_cap_item.is_on_list()) { + ldout(cct, 10) << __func__ << " changing auth cap: " + << "add myself to new auth MDS' dirty caps list" << dendl; + mds_session->get_dirty_list().push_back(&in->dirty_cap_item); + } + } + + in->auth_cap = ∩ + } + } + + unsigned old_caps = cap.issued; + cap.cap_id = cap_id; + cap.issued = issued; + cap.implemented |= issued; + if (ceph_seq_cmp(mseq, cap.mseq) > 0) + cap.wanted = wanted; + else + cap.wanted |= wanted; + cap.seq = seq; + cap.issue_seq = seq; + cap.mseq = mseq; + cap.gen = mds_session->cap_gen; + cap.latest_perms = cap_perms; + ldout(cct, 10) << __func__ << " issued " << ccap_string(old_caps) << " -> " << ccap_string(cap.issued) + << " from mds." << mds + << " on " << *in + << dendl; + + if ((issued & ~old_caps) && in->auth_cap == &cap) { + // non-auth MDS is revoking the newly grant caps ? + for (auto &p : in->caps) { + if (&p.second == &cap) + continue; + if (p.second.implemented & ~p.second.issued & issued) { + check_caps(in, CHECK_CAPS_NODELAY); + break; + } + } + } + + if (issued & ~old_caps) + signal_cond_list(in->waitfor_caps); +} + +void Client::remove_cap(Cap *cap, bool queue_release) +{ + auto &in = cap->inode; + MetaSession *session = cap->session; + mds_rank_t mds = cap->session->mds_num; + + ldout(cct, 10) << __func__ << " mds." << mds << " on " << in << dendl; + + if (queue_release) { + session->enqueue_cap_release( + in.ino, + cap->cap_id, + cap->issue_seq, + cap->mseq, + cap_epoch_barrier); + } else { + dec_pinned_icaps(); + } + + + if (in.auth_cap == cap) { + if (in.flushing_cap_item.is_on_list()) { + ldout(cct, 10) << " removing myself from flushing_cap list" << dendl; + in.flushing_cap_item.remove_myself(); + } + in.auth_cap = NULL; + } + size_t n = in.caps.erase(mds); + ceph_assert(n == 1); + cap = nullptr; + + if (!in.is_any_caps()) { + ldout(cct, 15) << __func__ << " last one, closing snaprealm " << in.snaprealm << dendl; + in.snaprealm_item.remove_myself(); + put_snap_realm(in.snaprealm); + in.snaprealm = 0; + } +} + +void Client::remove_all_caps(Inode *in) +{ + while (!in->caps.empty()) + remove_cap(&in->caps.begin()->second, true); +} + +void Client::remove_session_caps(MetaSession *s, int err) +{ + ldout(cct, 10) << __func__ << " mds." << s->mds_num << dendl; + + while (s->caps.size()) { + Cap *cap = *s->caps.begin(); + InodeRef in(&cap->inode); + bool dirty_caps = false; + if (in->auth_cap == cap) { + dirty_caps = in->dirty_caps | in->flushing_caps; + in->wanted_max_size = 0; + in->requested_max_size = 0; + if (in->has_any_filelocks()) + in->flags |= I_ERROR_FILELOCK; + } + auto caps = cap->implemented; + if (cap->wanted | cap->issued) + in->flags |= I_CAP_DROPPED; + remove_cap(cap, false); + in->cap_snaps.clear(); + if (dirty_caps) { + lderr(cct) << __func__ << " still has dirty|flushing caps on " << *in << dendl; + if (in->flushing_caps) { + num_flushing_caps--; + in->flushing_cap_tids.clear(); + } + in->flushing_caps = 0; + in->mark_caps_clean(); + put_inode(in.get()); + } + caps &= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_BUFFER; + if (caps && !in->caps_issued_mask(caps, true)) { + if (err == -CEPHFS_EBLOCKLISTED) { + if (in->oset.dirty_or_tx) { + lderr(cct) << __func__ << " still has dirty data on " << *in << dendl; + in->set_async_err(err); + } + objectcacher->purge_set(&in->oset); + } else { + objectcacher->release_set(&in->oset); + } + _schedule_invalidate_callback(in.get(), 0, 0); + } + + signal_cond_list(in->waitfor_caps); + } + s->flushing_caps_tids.clear(); + sync_cond.notify_all(); +} + +std::pair<int, bool> Client::_do_remount(bool retry_on_error) +{ + uint64_t max_retries = cct->_conf.get_val<uint64_t>("client_max_retries_on_remount_failure"); + bool abort_on_failure = false; + + errno = 0; + int r = remount_cb(callback_handle); + if (r == 0) { + retries_on_invalidate = 0; + } else { + int e = errno; + client_t whoami = get_nodeid(); + if (r == -1) { + lderr(cct) << + "failed to remount (to trim kernel dentries): " + "errno = " << e << " (" << strerror(e) << ")" << dendl; + } else { + lderr(cct) << + "failed to remount (to trim kernel dentries): " + "return code = " << r << dendl; + } + bool should_abort = + (cct->_conf.get_val<bool>("client_die_on_failed_remount") || + cct->_conf.get_val<bool>("client_die_on_failed_dentry_invalidate")) && + !(retry_on_error && (++retries_on_invalidate < max_retries)); + if (should_abort && !is_unmounting()) { + lderr(cct) << "failed to remount for kernel dentry trimming; quitting!" << dendl; + abort_on_failure = true; + } + } + return std::make_pair(r, abort_on_failure); +} + +class C_Client_Remount : public Context { +private: + Client *client; +public: + explicit C_Client_Remount(Client *c) : client(c) {} + void finish(int r) override { + ceph_assert(r == 0); + auto result = client->_do_remount(true); + if (result.second) { + ceph_abort(); + } + } +}; + +void Client::_invalidate_kernel_dcache() +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + if (can_invalidate_dentries) { + if (dentry_invalidate_cb && root->dir) { + for (ceph::unordered_map<string, Dentry*>::iterator p = root->dir->dentries.begin(); + p != root->dir->dentries.end(); + ++p) { + if (p->second->inode) + _schedule_invalidate_dentry_callback(p->second, false); + } + } + } else if (remount_cb) { + // Hacky: + // when remounting a file system, linux kernel trims all unused dentries in the fs + remount_finisher.queue(new C_Client_Remount(this)); + } +} + +void Client::_trim_negative_child_dentries(InodeRef& in) +{ + if (!in->is_dir()) + return; + + Dir* dir = in->dir; + if (dir && dir->dentries.size() == dir->num_null_dentries) { + for (auto p = dir->dentries.begin(); p != dir->dentries.end(); ) { + Dentry *dn = p->second; + ++p; + ceph_assert(!dn->inode); + if (dn->lru_is_expireable()) + unlink(dn, true, false); // keep dir, drop dentry + } + if (dir->dentries.empty()) { + close_dir(dir); + } + } + + if (in->flags & I_SNAPDIR_OPEN) { + InodeRef snapdir = open_snapdir(in.get()); + _trim_negative_child_dentries(snapdir); + } +} + +class C_Client_CacheRelease : public Context { +private: + Client *client; + vinodeno_t ino; +public: + C_Client_CacheRelease(Client *c, Inode *in) : + client(c) { + if (client->use_faked_inos()) + ino = vinodeno_t(in->faked_ino, CEPH_NOSNAP); + else + ino = in->vino(); + } + void finish(int r) override { + ceph_assert(ceph_mutex_is_not_locked_by_me(client->client_lock)); + client->_async_inode_release(ino); + } +}; + +void Client::_async_inode_release(vinodeno_t ino) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + ldout(cct, 10) << __func__ << " " << ino << dendl; + ino_release_cb(callback_handle, ino); +} + +void Client::_schedule_ino_release_callback(Inode *in) { + + if (ino_release_cb) + // we queue the invalidate, which calls the callback and decrements the ref + async_ino_releasor.queue(new C_Client_CacheRelease(this, in)); +} + +void Client::trim_caps(MetaSession *s, uint64_t max) +{ + mds_rank_t mds = s->mds_num; + size_t caps_size = s->caps.size(); + ldout(cct, 10) << __func__ << " mds." << mds << " max " << max + << " caps " << caps_size << dendl; + + uint64_t trimmed = 0; + auto p = s->caps.begin(); + std::set<Dentry *> to_trim; /* this avoids caps other than the one we're + * looking at from getting deleted during traversal. */ + while ((caps_size - trimmed) > max && !p.end()) { + Cap *cap = *p; + InodeRef in(&cap->inode); + + // Increment p early because it will be invalidated if cap + // is deleted inside remove_cap + ++p; + + if (in->caps.size() > 1 && cap != in->auth_cap) { + int mine = cap->issued | cap->implemented; + int oissued = in->auth_cap ? in->auth_cap->issued : 0; + // disposable non-auth cap + if (!(get_caps_used(in.get()) & ~oissued & mine)) { + ldout(cct, 20) << " removing unused, unneeded non-auth cap on " << *in << dendl; + cap = (remove_cap(cap, true), nullptr); + trimmed++; + } + } else { + ldout(cct, 20) << " trying to trim dentries for " << *in << dendl; + _trim_negative_child_dentries(in); + bool all = true; + auto q = in->dentries.begin(); + while (q != in->dentries.end()) { + Dentry *dn = *q; + ++q; + if (dn->lru_is_expireable()) { + if (can_invalidate_dentries && + dn->dir->parent_inode->ino == CEPH_INO_ROOT) { + // Only issue one of these per DN for inodes in root: handle + // others more efficiently by calling for root-child DNs at + // the end of this function. + _schedule_invalidate_dentry_callback(dn, true); + } + ldout(cct, 20) << " queueing dentry for trimming: " << dn->name << dendl; + to_trim.insert(dn); + } else { + ldout(cct, 20) << " not expirable: " << dn->name << dendl; + all = false; + } + } + if (in->ll_ref == 1 && in->ino != CEPH_INO_ROOT) { + _schedule_ino_release_callback(in.get()); + } + if (all && in->ino != CEPH_INO_ROOT) { + ldout(cct, 20) << __func__ << " counting as trimmed: " << *in << dendl; + trimmed++; + } + } + } + ldout(cct, 20) << " trimming queued dentries: " << dendl; + for (const auto &dn : to_trim) { + trim_dentry(dn); + } + to_trim.clear(); + + caps_size = s->caps.size(); + if (caps_size > (size_t)max) + _invalidate_kernel_dcache(); +} + +void Client::force_session_readonly(MetaSession *s) +{ + s->readonly = true; + for (xlist<Cap*>::iterator p = s->caps.begin(); !p.end(); ++p) { + auto &in = (*p)->inode; + if (in.caps_wanted() & CEPH_CAP_FILE_WR) + signal_cond_list(in.waitfor_caps); + } +} + +int Client::mark_caps_flushing(Inode *in, ceph_tid_t* ptid) +{ + MetaSession *session = in->auth_cap->session; + + int flushing = in->dirty_caps; + ceph_assert(flushing); + + ceph_tid_t flush_tid = ++last_flush_tid; + in->flushing_cap_tids[flush_tid] = flushing; + + if (!in->flushing_caps) { + ldout(cct, 10) << __func__ << " " << ccap_string(flushing) << " " << *in << dendl; + num_flushing_caps++; + } else { + ldout(cct, 10) << __func__ << " (more) " << ccap_string(flushing) << " " << *in << dendl; + } + + in->flushing_caps |= flushing; + in->mark_caps_clean(); + + if (!in->flushing_cap_item.is_on_list()) + session->flushing_caps.push_back(&in->flushing_cap_item); + session->flushing_caps_tids.insert(flush_tid); + + *ptid = flush_tid; + return flushing; +} + +void Client::adjust_session_flushing_caps(Inode *in, MetaSession *old_s, MetaSession *new_s) +{ + for (auto &p : in->cap_snaps) { + CapSnap &capsnap = p.second; + if (capsnap.flush_tid > 0) { + old_s->flushing_caps_tids.erase(capsnap.flush_tid); + new_s->flushing_caps_tids.insert(capsnap.flush_tid); + } + } + for (map<ceph_tid_t, int>::iterator it = in->flushing_cap_tids.begin(); + it != in->flushing_cap_tids.end(); + ++it) { + old_s->flushing_caps_tids.erase(it->first); + new_s->flushing_caps_tids.insert(it->first); + } + new_s->flushing_caps.push_back(&in->flushing_cap_item); +} + +/* + * Flush all the dirty caps back to the MDS. Because the callers + * generally wait on the result of this function (syncfs and umount + * cases), we set CHECK_CAPS_SYNCHRONOUS on the last check_caps call. + */ +void Client::flush_caps_sync() +{ + ldout(cct, 10) << __func__ << dendl; + for (auto &q : mds_sessions) { + auto s = q.second; + xlist<Inode*>::iterator p = s->dirty_list.begin(); + while (!p.end()) { + unsigned flags = CHECK_CAPS_NODELAY; + Inode *in = *p; + + ++p; + if (p.end()) + flags |= CHECK_CAPS_SYNCHRONOUS; + check_caps(in, flags); + } + } +} + +void Client::wait_sync_caps(Inode *in, ceph_tid_t want) +{ + while (in->flushing_caps) { + map<ceph_tid_t, int>::iterator it = in->flushing_cap_tids.begin(); + ceph_assert(it != in->flushing_cap_tids.end()); + if (it->first > want) + break; + ldout(cct, 10) << __func__ << " on " << *in << " flushing " + << ccap_string(it->second) << " want " << want + << " last " << it->first << dendl; + wait_on_list(in->waitfor_caps); + } +} + +void Client::wait_sync_caps(ceph_tid_t want) +{ + retry: + ldout(cct, 10) << __func__ << " want " << want << " (last is " << last_flush_tid << ", " + << num_flushing_caps << " total flushing)" << dendl; + for (auto &p : mds_sessions) { + auto s = p.second; + if (s->flushing_caps_tids.empty()) + continue; + ceph_tid_t oldest_tid = *s->flushing_caps_tids.begin(); + if (oldest_tid <= want) { + ldout(cct, 10) << " waiting on mds." << p.first << " tid " << oldest_tid + << " (want " << want << ")" << dendl; + std::unique_lock l{client_lock, std::adopt_lock}; + sync_cond.wait(l); + l.release(); + goto retry; + } + } +} + +void Client::kick_flushing_caps(Inode *in, MetaSession *session) +{ + in->flags &= ~I_KICK_FLUSH; + + Cap *cap = in->auth_cap; + ceph_assert(cap->session == session); + + ceph_tid_t last_snap_flush = 0; + for (auto p = in->flushing_cap_tids.rbegin(); + p != in->flushing_cap_tids.rend(); + ++p) { + if (!p->second) { + last_snap_flush = p->first; + break; + } + } + + int wanted = in->caps_wanted(); + int used = get_caps_used(in) | in->caps_dirty(); + auto it = in->cap_snaps.begin(); + for (auto& p : in->flushing_cap_tids) { + if (p.second) { + int msg_flags = p.first < last_snap_flush ? MClientCaps::FLAG_PENDING_CAPSNAP : 0; + send_cap(in, session, cap, msg_flags, used, wanted, (cap->issued | cap->implemented), + p.second, p.first); + } else { + ceph_assert(it != in->cap_snaps.end()); + ceph_assert(it->second.flush_tid == p.first); + send_flush_snap(in, session, it->first, it->second); + ++it; + } + } +} + +void Client::kick_flushing_caps(MetaSession *session) +{ + mds_rank_t mds = session->mds_num; + ldout(cct, 10) << __func__ << " mds." << mds << dendl; + + for (xlist<Inode*>::iterator p = session->flushing_caps.begin(); !p.end(); ++p) { + Inode *in = *p; + if (in->flags & I_KICK_FLUSH) { + ldout(cct, 20) << " reflushing caps on " << *in << " to mds." << mds << dendl; + kick_flushing_caps(in, session); + } + } +} + +void Client::early_kick_flushing_caps(MetaSession *session) +{ + for (xlist<Inode*>::iterator p = session->flushing_caps.begin(); !p.end(); ++p) { + Inode *in = *p; + Cap *cap = in->auth_cap; + ceph_assert(cap); + + // if flushing caps were revoked, we re-send the cap flush in client reconnect + // stage. This guarantees that MDS processes the cap flush message before issuing + // the flushing caps to other client. + if ((in->flushing_caps & in->auth_cap->issued) == in->flushing_caps) { + in->flags |= I_KICK_FLUSH; + continue; + } + + ldout(cct, 20) << " reflushing caps (early_kick) on " << *in + << " to mds." << session->mds_num << dendl; + // send_reconnect() also will reset these sequence numbers. make sure + // sequence numbers in cap flush message match later reconnect message. + cap->seq = 0; + cap->issue_seq = 0; + cap->mseq = 0; + cap->issued = cap->implemented; + + kick_flushing_caps(in, session); + } +} + +void Client::invalidate_snaprealm_and_children(SnapRealm *realm) +{ + list<SnapRealm*> q; + q.push_back(realm); + + while (!q.empty()) { + realm = q.front(); + q.pop_front(); + + ldout(cct, 10) << __func__ << " " << *realm << dendl; + realm->invalidate_cache(); + + for (set<SnapRealm*>::iterator p = realm->pchildren.begin(); + p != realm->pchildren.end(); + ++p) + q.push_back(*p); + } +} + +SnapRealm *Client::get_snap_realm(inodeno_t r) +{ + SnapRealm *realm = snap_realms[r]; + + ldout(cct, 20) << __func__ << " " << r << " " << realm << ", nref was " + << (realm ? realm->nref : 0) << dendl; + if (!realm) { + snap_realms[r] = realm = new SnapRealm(r); + + // Do not release the global snaprealm until unmounting. + if (r == CEPH_INO_GLOBAL_SNAPREALM) + realm->nref++; + } + + realm->nref++; + ldout(cct, 20) << __func__ << " " << r << " " << realm << ", nref now is " + << realm->nref << dendl; + return realm; +} + +SnapRealm *Client::get_snap_realm_maybe(inodeno_t r) +{ + if (snap_realms.count(r) == 0) { + ldout(cct, 20) << __func__ << " " << r << " fail" << dendl; + return NULL; + } + SnapRealm *realm = snap_realms[r]; + ldout(cct, 20) << __func__ << " " << r << " " << realm << " " << realm->nref << " -> " << (realm->nref + 1) << dendl; + realm->nref++; + return realm; +} + +void Client::put_snap_realm(SnapRealm *realm) +{ + ldout(cct, 20) << __func__ << " " << realm->ino << " " << realm + << " " << realm->nref << " -> " << (realm->nref - 1) << dendl; + if (--realm->nref == 0) { + snap_realms.erase(realm->ino); + if (realm->pparent) { + realm->pparent->pchildren.erase(realm); + put_snap_realm(realm->pparent); + } + delete realm; + } +} + +bool Client::adjust_realm_parent(SnapRealm *realm, inodeno_t parent) +{ + if (realm->parent != parent) { + ldout(cct, 10) << __func__ << " " << *realm + << " " << realm->parent << " -> " << parent << dendl; + realm->parent = parent; + if (realm->pparent) { + realm->pparent->pchildren.erase(realm); + put_snap_realm(realm->pparent); + } + realm->pparent = get_snap_realm(parent); + realm->pparent->pchildren.insert(realm); + return true; + } + return false; +} + +static bool has_new_snaps(const SnapContext& old_snapc, + const SnapContext& new_snapc) +{ + return !new_snapc.snaps.empty() && new_snapc.snaps[0] > old_snapc.seq; +} + +struct SnapRealmInfoMeta { + SnapRealmInfoMeta(utime_t last_modified, uint64_t change_attr) + : last_modified(last_modified), + change_attr(change_attr) { + } + + utime_t last_modified; + uint64_t change_attr; +}; + +static std::pair<SnapRealmInfo, std::optional<SnapRealmInfoMeta>> get_snap_realm_info( + MetaSession *session, bufferlist::const_iterator &p) { + if (session->mds_features.test(CEPHFS_FEATURE_NEW_SNAPREALM_INFO)) { + SnapRealmInfoNew ninfo; + decode(ninfo, p); + return std::make_pair(ninfo.info, SnapRealmInfoMeta(ninfo.last_modified, ninfo.change_attr)); + } else { + SnapRealmInfo info; + decode(info, p); + return std::make_pair(info, std::nullopt); + } +} + + +void Client::update_snap_trace(MetaSession *session, const bufferlist& bl, SnapRealm **realm_ret, bool flush) +{ + SnapRealm *first_realm = NULL; + ldout(cct, 10) << __func__ << " len " << bl.length() << dendl; + + map<SnapRealm*, SnapContext> dirty_realms; + + auto p = bl.cbegin(); + while (!p.end()) { + auto [info, realm_info_meta] = get_snap_realm_info(session, p); + SnapRealm *realm = get_snap_realm(info.ino()); + + bool invalidate = false; + + if (info.seq() > realm->seq || + (realm_info_meta && (*realm_info_meta).change_attr > realm->change_attr)) { + ldout(cct, 10) << __func__ << " " << *realm << " seq " << info.seq() << " > " << realm->seq + << dendl; + + if (flush) { + // writeback any dirty caps _before_ updating snap list (i.e. with old snap info) + // flush me + children + list<SnapRealm*> q; + q.push_back(realm); + while (!q.empty()) { + SnapRealm *realm = q.front(); + q.pop_front(); + + for (set<SnapRealm*>::iterator p = realm->pchildren.begin(); + p != realm->pchildren.end(); + ++p) + q.push_back(*p); + + if (dirty_realms.count(realm) == 0) { + realm->nref++; + dirty_realms[realm] = realm->get_snap_context(); + } + } + } + + // update + realm->seq = info.seq(); + realm->created = info.created(); + realm->parent_since = info.parent_since(); + realm->prior_parent_snaps = info.prior_parent_snaps; + if (realm_info_meta) { + realm->last_modified = (*realm_info_meta).last_modified; + realm->change_attr = (*realm_info_meta).change_attr; + } + realm->my_snaps = info.my_snaps; + invalidate = true; + } + + // _always_ verify parent + if (adjust_realm_parent(realm, info.parent())) + invalidate = true; + + if (invalidate) { + invalidate_snaprealm_and_children(realm); + ldout(cct, 15) << __func__ << " " << *realm << " self|parent updated" << dendl; + ldout(cct, 15) << " snapc " << realm->get_snap_context() << dendl; + } else { + ldout(cct, 10) << __func__ << " " << *realm << " seq " << info.seq() + << " <= " << realm->seq << " and same parent, SKIPPING" << dendl; + } + + if (!first_realm) + first_realm = realm; + else + put_snap_realm(realm); + } + + for (auto &[realm, snapc] : dirty_realms) { + // if there are new snaps ? + if (has_new_snaps(snapc, realm->get_snap_context())) { + ldout(cct, 10) << " flushing caps on " << *realm << dendl; + for (auto&& in : realm->inodes_with_caps) { + queue_cap_snap(in, snapc); + } + } else { + ldout(cct, 10) << " no new snap on " << *realm << dendl; + } + put_snap_realm(realm); + } + + if (realm_ret) + *realm_ret = first_realm; + else + put_snap_realm(first_realm); +} + +void Client::handle_snap(const MConstRef<MClientSnap>& m) +{ + ldout(cct, 10) << __func__ << " " << *m << dendl; + mds_rank_t mds = mds_rank_t(m->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds, m->get_connection().get()); + if (!session) { + return; + } + + got_mds_push(session.get()); + + map<Inode*, SnapContext> to_move; + SnapRealm *realm = 0; + + if (m->head.op == CEPH_SNAP_OP_SPLIT) { + ceph_assert(m->head.split); + auto p = m->bl.cbegin(); + auto [info, _] = get_snap_realm_info(session.get(), p); + ceph_assert(info.ino() == m->head.split); + + // flush, then move, ino's. + realm = get_snap_realm(info.ino()); + ldout(cct, 10) << " splitting off " << *realm << dendl; + for (auto& ino : m->split_inos) { + vinodeno_t vino(ino, CEPH_NOSNAP); + if (inode_map.count(vino)) { + Inode *in = inode_map[vino]; + if (!in->snaprealm || in->snaprealm == realm) + continue; + if (in->snaprealm->created > info.created()) { + ldout(cct, 10) << " NOT moving " << *in << " from _newer_ realm " + << *in->snaprealm << dendl; + continue; + } + ldout(cct, 10) << " moving " << *in << " from " << *in->snaprealm << dendl; + + + in->snaprealm_item.remove_myself(); + to_move[in] = in->snaprealm->get_snap_context(); + put_snap_realm(in->snaprealm); + } + } + + // move child snaprealms, too + for (auto& child_realm : m->split_realms) { + ldout(cct, 10) << "adjusting snaprealm " << child_realm << " parent" << dendl; + SnapRealm *child = get_snap_realm_maybe(child_realm); + if (!child) + continue; + adjust_realm_parent(child, realm->ino); + put_snap_realm(child); + } + } + + update_snap_trace(session.get(), m->bl, NULL, m->head.op != CEPH_SNAP_OP_DESTROY); + + if (realm) { + for (auto p = to_move.begin(); p != to_move.end(); ++p) { + Inode *in = p->first; + in->snaprealm = realm; + realm->inodes_with_caps.push_back(&in->snaprealm_item); + realm->nref++; + // queue for snap writeback + if (has_new_snaps(p->second, realm->get_snap_context())) + queue_cap_snap(in, p->second); + } + put_snap_realm(realm); + } +} + +void Client::handle_quota(const MConstRef<MClientQuota>& m) +{ + mds_rank_t mds = mds_rank_t(m->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds, m->get_connection().get()); + if (!session) { + return; + } + + got_mds_push(session.get()); + + ldout(cct, 10) << __func__ << " " << *m << " from mds." << mds << dendl; + + vinodeno_t vino(m->ino, CEPH_NOSNAP); + if (inode_map.count(vino)) { + Inode *in = NULL; + in = inode_map[vino]; + + if (in) { + in->quota = m->quota; + in->rstat = m->rstat; + } + } +} + +void Client::handle_caps(const MConstRef<MClientCaps>& m) +{ + mds_rank_t mds = mds_rank_t(m->get_source().num()); + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(mds, m->get_connection().get()); + if (!session) { + return; + } + + if (m->osd_epoch_barrier && !objecter->have_map(m->osd_epoch_barrier)) { + // Pause RADOS operations until we see the required epoch + objecter->set_epoch_barrier(m->osd_epoch_barrier); + } + + if (m->osd_epoch_barrier > cap_epoch_barrier) { + // Record the barrier so that we will transmit it to MDS when releasing + set_cap_epoch_barrier(m->osd_epoch_barrier); + } + + got_mds_push(session.get()); + + bool do_cap_release = false; + Inode *in; + vinodeno_t vino(m->get_ino(), CEPH_NOSNAP); + if (auto it = inode_map.find(vino); it != inode_map.end()) { + in = it->second; + + /* MDS maybe waiting for cap release with increased seq */ + switch (m->get_op()) { + case CEPH_CAP_OP_REVOKE: + case CEPH_CAP_OP_GRANT: + if (!in->caps.count(mds)) { + do_cap_release = true; + ldout(cct, 5) << __func__ << " vino " << vino << " don't have cap " + << m->get_cap_id() << " op " << m->get_op() + << ", immediately releasing" << dendl; + } + } + } else { + /* MDS maybe waiting for cap release with increased seq */ + switch (m->get_op()) { + case CEPH_CAP_OP_IMPORT: + case CEPH_CAP_OP_REVOKE: + case CEPH_CAP_OP_GRANT: + do_cap_release = true; + ldout(cct, 5) << __func__ << " don't have vino " << vino << " op " + << m->get_op() << ", immediately releasing" << dendl; + break; + default: + ldout(cct, 5) << __func__ << " don't have vino " << vino << ", dropping" << dendl; + return; + } + } + + // In case the mds is waiting on e.g. a revocation + if (do_cap_release) { + session->enqueue_cap_release( + m->get_ino(), + m->get_cap_id(), + m->get_seq(), + m->get_mseq(), + cap_epoch_barrier); + + flush_cap_releases(); + return; + } + + switch (m->get_op()) { + case CEPH_CAP_OP_EXPORT: return handle_cap_export(session.get(), in, m); + case CEPH_CAP_OP_FLUSHSNAP_ACK: return handle_cap_flushsnap_ack(session.get(), in, m); + case CEPH_CAP_OP_IMPORT: /* no return */ handle_cap_import(session.get(), in, m); + } + + if (auto it = in->caps.find(mds); it != in->caps.end()) { + Cap &cap = in->caps.at(mds); + + switch (m->get_op()) { + case CEPH_CAP_OP_TRUNC: return handle_cap_trunc(session.get(), in, m); + case CEPH_CAP_OP_IMPORT: + case CEPH_CAP_OP_REVOKE: + case CEPH_CAP_OP_GRANT: return handle_cap_grant(session.get(), in, &cap, m); + case CEPH_CAP_OP_FLUSH_ACK: return handle_cap_flush_ack(session.get(), in, &cap, m); + } + } else { + ldout(cct, 5) << __func__ << " don't have " << *in << " cap on mds." << mds << dendl; + return; + } +} + +void Client::handle_cap_import(MetaSession *session, Inode *in, const MConstRef<MClientCaps>& m) +{ + mds_rank_t mds = session->mds_num; + + ldout(cct, 5) << __func__ << " ino " << m->get_ino() << " mseq " << m->get_mseq() + << " IMPORT from mds." << mds << dendl; + + const mds_rank_t peer_mds = mds_rank_t(m->peer.mds); + Cap *cap = NULL; + UserPerm cap_perms; + if (auto it = in->caps.find(peer_mds); m->peer.cap_id && it != in->caps.end()) { + cap = &it->second; + cap_perms = cap->latest_perms; + } + + // add/update it + SnapRealm *realm = NULL; + update_snap_trace(session, m->snapbl, &realm); + + int issued = m->get_caps(); + int wanted = m->get_wanted(); + add_update_cap(in, session, m->get_cap_id(), + issued, wanted, m->get_seq(), m->get_mseq(), + m->get_realm(), CEPH_CAP_FLAG_AUTH, cap_perms); + + if (cap && cap->cap_id == m->peer.cap_id) { + remove_cap(cap, (m->peer.flags & CEPH_CAP_FLAG_RELEASE)); + } + + if (realm) + put_snap_realm(realm); + + if (in->auth_cap && in->auth_cap->session == session) { + if (!(wanted & CEPH_CAP_ANY_FILE_WR) || + in->requested_max_size > m->get_max_size()) { + in->requested_max_size = 0; + ldout(cct, 15) << "reset requested_max_size after cap import" << dendl; + } + // reflush any/all caps (if we are now the auth_cap) + kick_flushing_caps(in, session); + } +} + +void Client::handle_cap_export(MetaSession *session, Inode *in, const MConstRef<MClientCaps>& m) +{ + mds_rank_t mds = session->mds_num; + + ldout(cct, 5) << __func__ << " ino " << m->get_ino() << " mseq " << m->get_mseq() + << " EXPORT from mds." << mds << dendl; + + auto it = in->caps.find(mds); + if (it != in->caps.end()) { + Cap &cap = it->second; + if (cap.cap_id == m->get_cap_id()) { + if (m->peer.cap_id) { + const auto peer_mds = mds_rank_t(m->peer.mds); + auto tsession = _get_or_open_mds_session(peer_mds); + auto it = in->caps.find(peer_mds); + if (it != in->caps.end()) { + Cap &tcap = it->second; + if (tcap.cap_id == m->peer.cap_id && + ceph_seq_cmp(tcap.seq, m->peer.seq) < 0) { + tcap.cap_id = m->peer.cap_id; + tcap.seq = m->peer.seq - 1; + tcap.issue_seq = tcap.seq; + tcap.issued |= cap.issued; + tcap.implemented |= cap.issued; + if (&cap == in->auth_cap) + in->auth_cap = &tcap; + if (in->auth_cap == &tcap && in->flushing_cap_item.is_on_list()) + adjust_session_flushing_caps(in, session, tsession.get()); + } + } else { + add_update_cap(in, tsession.get(), m->peer.cap_id, cap.issued, 0, + m->peer.seq - 1, m->peer.mseq, (uint64_t)-1, + &cap == in->auth_cap ? CEPH_CAP_FLAG_AUTH : 0, + cap.latest_perms); + } + } else { + if (cap.wanted | cap.issued) + in->flags |= I_CAP_DROPPED; + } + + remove_cap(&cap, false); + } + } +} + +void Client::handle_cap_trunc(MetaSession *session, Inode *in, const MConstRef<MClientCaps>& m) +{ + mds_rank_t mds = session->mds_num; + ceph_assert(in->caps.count(mds)); + + uint64_t size = m->get_size(); + if (in->is_fscrypt_enabled()) { + size = std::stoll(std::string(std::rbegin(m->fscrypt_file), + std::rend(m->fscrypt_file))); + } + ldout(cct, 10) << __func__ << " on ino " << *in + << " size " << in->size << " -> " << m->get_size() + << dendl; + + int issued; + in->caps_issued(&issued); + issued |= in->caps_dirty(); + update_inode_file_size(in, issued, size, m->get_truncate_seq(), + m->get_truncate_size()); +} + +void Client::handle_cap_flush_ack(MetaSession *session, Inode *in, Cap *cap, const MConstRef<MClientCaps>& m) +{ + ceph_tid_t flush_ack_tid = m->get_client_tid(); + int dirty = m->get_dirty(); + int cleaned = 0; + int flushed = 0; + + auto it = in->flushing_cap_tids.begin(); + if (it->first < flush_ack_tid) { + ldout(cct, 0) << __func__ << " mds." << session->mds_num + << " got unexpected flush ack tid " << flush_ack_tid + << " expected is " << it->first << dendl; + } + for (; it != in->flushing_cap_tids.end(); ) { + if (!it->second) { + // cap snap + ++it; + continue; + } + if (it->first == flush_ack_tid) + cleaned = it->second; + if (it->first <= flush_ack_tid) { + session->flushing_caps_tids.erase(it->first); + in->flushing_cap_tids.erase(it++); + ++flushed; + continue; + } + cleaned &= ~it->second; + if (!cleaned) + break; + ++it; + } + + ldout(cct, 5) << __func__ << " mds." << session->mds_num + << " cleaned " << ccap_string(cleaned) << " on " << *in + << " with " << ccap_string(dirty) << dendl; + + if (flushed) { + signal_cond_list(in->waitfor_caps); + if (session->flushing_caps_tids.empty() || + *session->flushing_caps_tids.begin() > flush_ack_tid) + sync_cond.notify_all(); + } + + if (!dirty) { + in->cap_dirtier_uid = -1; + in->cap_dirtier_gid = -1; + } + + if (!cleaned) { + ldout(cct, 10) << " tid " << m->get_client_tid() << " != any cap bit tids" << dendl; + } else { + if (in->flushing_caps) { + ldout(cct, 5) << " flushing_caps " << ccap_string(in->flushing_caps) + << " -> " << ccap_string(in->flushing_caps & ~cleaned) << dendl; + in->flushing_caps &= ~cleaned; + if (in->flushing_caps == 0) { + ldout(cct, 10) << " " << *in << " !flushing" << dendl; + num_flushing_caps--; + if (in->flushing_cap_tids.empty()) + in->flushing_cap_item.remove_myself(); + } + if (!in->caps_dirty()) + put_inode(in); + } + } +} + + +void Client::handle_cap_flushsnap_ack(MetaSession *session, Inode *in, const MConstRef<MClientCaps>& m) +{ + ceph_tid_t flush_ack_tid = m->get_client_tid(); + mds_rank_t mds = session->mds_num; + ceph_assert(in->caps.count(mds)); + snapid_t follows = m->get_snap_follows(); + + if (auto it = in->cap_snaps.find(follows); it != in->cap_snaps.end()) { + auto& capsnap = it->second; + if (flush_ack_tid != capsnap.flush_tid) { + ldout(cct, 10) << " tid " << flush_ack_tid << " != " << capsnap.flush_tid << dendl; + } else { + InodeRef tmp_ref(in); + ldout(cct, 5) << __func__ << " mds." << mds << " flushed snap follows " << follows + << " on " << *in << dendl; + session->flushing_caps_tids.erase(capsnap.flush_tid); + in->flushing_cap_tids.erase(capsnap.flush_tid); + if (in->flushing_caps == 0 && in->flushing_cap_tids.empty()) + in->flushing_cap_item.remove_myself(); + in->cap_snaps.erase(it); + + signal_cond_list(in->waitfor_caps); + if (session->flushing_caps_tids.empty() || + *session->flushing_caps_tids.begin() > flush_ack_tid) + sync_cond.notify_all(); + } + } else { + ldout(cct, 5) << __func__ << " DUP(?) mds." << mds << " flushed snap follows " << follows + << " on " << *in << dendl; + // we may not have it if we send multiple FLUSHSNAP requests and (got multiple FLUSHEDSNAPs back) + } +} + +class C_Client_DentryInvalidate : public Context { +private: + Client *client; + vinodeno_t dirino; + vinodeno_t ino; + string name; +public: + C_Client_DentryInvalidate(Client *c, Dentry *dn, bool del) : + client(c), name(dn->name) { + if (client->use_faked_inos()) { + dirino.ino = dn->dir->parent_inode->faked_ino; + if (del) + ino.ino = dn->inode->faked_ino; + } else { + dirino = dn->dir->parent_inode->vino(); + if (del) + ino = dn->inode->vino(); + } + if (!del) + ino.ino = inodeno_t(); + } + void finish(int r) override { + // _async_dentry_invalidate is responsible for its own locking + ceph_assert(ceph_mutex_is_not_locked_by_me(client->client_lock)); + client->_async_dentry_invalidate(dirino, ino, name); + } +}; + +void Client::_async_dentry_invalidate(vinodeno_t dirino, vinodeno_t ino, string& name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + ldout(cct, 10) << __func__ << " '" << name << "' ino " << ino + << " in dir " << dirino << dendl; + dentry_invalidate_cb(callback_handle, dirino, ino, name.c_str(), name.length()); +} + +void Client::_schedule_invalidate_dentry_callback(Dentry *dn, bool del) +{ + if (dentry_invalidate_cb && dn->inode->ll_ref > 0) + async_dentry_invalidator.queue(new C_Client_DentryInvalidate(this, dn, del)); +} + +void Client::_try_to_trim_inode(Inode *in, bool sched_inval) +{ + int ref = in->get_nref(); + ldout(cct, 5) << __func__ << " in " << *in <<dendl; + + if (in->dir && !in->dir->dentries.empty()) { + for (auto p = in->dir->dentries.begin(); + p != in->dir->dentries.end(); ) { + Dentry *dn = p->second; + ++p; + /* rmsnap removes whole subtree, need trim inodes recursively. + * we don't need to invalidate dentries recursively. because + * invalidating a directory dentry effectively invalidate + * whole subtree */ + if (in->snapid != CEPH_NOSNAP && dn->inode && dn->inode->is_dir()) + _try_to_trim_inode(dn->inode.get(), false); + + if (dn->lru_is_expireable()) + unlink(dn, true, false); // keep dir, drop dentry + } + if (in->dir->dentries.empty()) { + close_dir(in->dir); + --ref; + } + } + + if (ref > 1 && (in->flags & I_SNAPDIR_OPEN)) { + InodeRef snapdir = open_snapdir(in); + _try_to_trim_inode(snapdir.get(), false); + --ref; + } + + if (ref > 1) { + auto q = in->dentries.begin(); + while (q != in->dentries.end()) { + Dentry *dn = *q; + ++q; + if( in->ll_ref > 0 && sched_inval) { + // FIXME: we play lots of unlink/link tricks when handling MDS replies, + // so in->dentries doesn't always reflect the state of kernel's dcache. + _schedule_invalidate_dentry_callback(dn, true); + } + unlink(dn, true, true); + } + } +} + +void Client::handle_cap_grant(MetaSession *session, Inode *in, Cap *cap, const MConstRef<MClientCaps>& m) +{ + mds_rank_t mds = session->mds_num; + int used = get_caps_used(in); + int wanted = in->caps_wanted(); + int flags = 0; + + const unsigned new_caps = m->get_caps(); + const bool was_stale = session->cap_gen > cap->gen; + ldout(cct, 5) << __func__ << " on in " << m->get_ino() + << " mds." << mds << " seq " << m->get_seq() + << " caps now " << ccap_string(new_caps) + << " was " << ccap_string(cap->issued) + << (was_stale ? " (stale)" : "") << dendl; + + if (was_stale) + cap->issued = cap->implemented = CEPH_CAP_PIN; + cap->seq = m->get_seq(); + cap->gen = session->cap_gen; + + check_cap_issue(in, new_caps); + + // update inode + int issued; + in->caps_issued(&issued); + issued |= in->caps_dirty(); + + if ((new_caps & CEPH_CAP_AUTH_SHARED) && + !(issued & CEPH_CAP_AUTH_EXCL)) { + in->mode = m->head.mode; + in->uid = m->head.uid; + in->gid = m->head.gid; + in->btime = m->btime; + } + bool deleted_inode = false; + if ((new_caps & CEPH_CAP_LINK_SHARED) && + !(issued & CEPH_CAP_LINK_EXCL)) { + in->nlink = m->head.nlink; + if (in->nlink == 0) + deleted_inode = true; + } + if (!(issued & CEPH_CAP_XATTR_EXCL) && + m->xattrbl.length() && + m->head.xattr_version > in->xattr_version) { + auto p = m->xattrbl.cbegin(); + decode(in->xattrs, p); + in->xattr_version = m->head.xattr_version; + } + + if ((new_caps & CEPH_CAP_FILE_SHARED) && m->dirstat_is_valid()) { + in->dirstat.nfiles = m->get_nfiles(); + in->dirstat.nsubdirs = m->get_nsubdirs(); + } + + if (new_caps & CEPH_CAP_ANY_RD) { + update_inode_file_time(in, issued, m->get_time_warp_seq(), + m->get_ctime(), m->get_mtime(), m->get_atime()); + } + + if (new_caps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) { + in->layout = m->get_layout(); + update_inode_file_size(in, issued, m->get_size(), + m->get_truncate_seq(), m->get_truncate_size()); + } + + if (m->inline_version > in->inline_version) { + in->inline_data = m->inline_data; + in->inline_version = m->inline_version; + } + + /* always take a newer change attr */ + if (m->get_change_attr() > in->change_attr) + in->change_attr = m->get_change_attr(); + + // max_size + if (cap == in->auth_cap && + (new_caps & CEPH_CAP_ANY_FILE_WR) && + (m->get_max_size() != in->max_size)) { + ldout(cct, 10) << "max_size " << in->max_size << " -> " << m->get_max_size() << dendl; + in->max_size = m->get_max_size(); + if (in->max_size > in->wanted_max_size) { + in->wanted_max_size = 0; + in->requested_max_size = 0; + } + } + + bool check = false; + if ((was_stale || m->get_op() == CEPH_CAP_OP_IMPORT) && + (wanted & ~(cap->wanted | new_caps))) { + // If mds is importing cap, prior cap messages that update 'wanted' + // may get dropped by mds (migrate seq mismatch). + // + // We don't send cap message to update 'wanted' if what we want are + // already issued. If mds revokes caps, cap message that releases caps + // also tells mds what we want. But if caps got revoked by mds forcedly + // (session stale). We may haven't told mds what we want. + check = true; + } + + + // update caps + auto revoked = cap->issued & ~new_caps; + if (revoked) { + ldout(cct, 10) << " revocation of " << ccap_string(revoked) << dendl; + cap->issued = new_caps; + cap->implemented |= new_caps; + + // recall delegations if we're losing caps necessary for them + if (revoked & ceph_deleg_caps_for_type(CEPH_DELEGATION_RD)) + in->recall_deleg(false); + else if (revoked & ceph_deleg_caps_for_type(CEPH_DELEGATION_WR)) + in->recall_deleg(true); + + used = adjust_caps_used_for_lazyio(used, cap->issued, cap->implemented); + if ((used & revoked & (CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO)) && + !_flush(in, new C_Client_FlushComplete(this, in))) { + // waitin' for flush + } else if (used & revoked & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) { + if (_release(in)) { + check = true; + flags = CHECK_CAPS_NODELAY; + } + } else { + cap->wanted = 0; // don't let check_caps skip sending a response to MDS + check = true; + flags = CHECK_CAPS_NODELAY; + } + } else if (cap->issued == new_caps) { + ldout(cct, 10) << " caps unchanged at " << ccap_string(cap->issued) << dendl; + } else { + ldout(cct, 10) << " grant, new caps are " << ccap_string(new_caps & ~cap->issued) << dendl; + cap->issued = new_caps; + cap->implemented |= new_caps; + + if (cap == in->auth_cap) { + // non-auth MDS is revoking the newly grant caps ? + for (const auto &p : in->caps) { + if (&p.second == cap) + continue; + if (p.second.implemented & ~p.second.issued & new_caps) { + check = true; + break; + } + } + } + } + + // just in case the caps was released just before we get the revoke msg + if (!check && m->get_op() == CEPH_CAP_OP_REVOKE) { + cap->wanted = 0; // don't let check_caps skip sending a response to MDS + check = true; + flags = CHECK_CAPS_NODELAY; + } + + if (check) + check_caps(in, flags); + + // wake up waiters + if (new_caps) + signal_cond_list(in->waitfor_caps); + + // may drop inode's last ref + if (deleted_inode) + _try_to_trim_inode(in, true); +} + +int Client::inode_permission(Inode *in, const UserPerm& perms, unsigned want) +{ + if (perms.uid() == 0) { + // For directories, DACs are overridable. + // For files, Read/write DACs are always overridable but executable DACs are + // overridable when there is at least one exec bit set + if(!S_ISDIR(in->mode) && (want & MAY_EXEC) && !(in->mode & S_IXUGO)) + return -CEPHFS_EACCES; + return 0; + } + + if (perms.uid() != in->uid && (in->mode & S_IRWXG)) { + int ret = _posix_acl_permission(in, perms, want); + if (ret != -CEPHFS_EAGAIN) + return ret; + } + + // check permissions before doing anything else + if (!in->check_mode(perms, want)) + return -CEPHFS_EACCES; + return 0; +} + +int Client::xattr_permission(Inode *in, const char *name, unsigned want, + const UserPerm& perms) +{ + int r = _getattr_for_perm(in, perms); + if (r < 0) + goto out; + + r = 0; + if (strncmp(name, "system.", 7) == 0) { + if ((want & MAY_WRITE) && (perms.uid() != 0 && perms.uid() != in->uid)) + r = -CEPHFS_EPERM; + } else { + r = inode_permission(in, perms, want); + } +out: + ldout(cct, 5) << __func__ << " " << in << " = " << r << dendl; + return r; +} + +std::ostream& operator<<(std::ostream &out, const UserPerm& perm) { + out << "UserPerm(uid: " << perm.uid() << ", gid: " << perm.gid() << ")"; + return out; +} + +int Client::may_setattr(Inode *in, struct ceph_statx *stx, int mask, + const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *in << "; " << perms << " stx_mode: " + << hex << stx->stx_mode << " mask:" << mask << dec << dendl; + int r = _getattr_for_perm(in, perms); + if (r < 0) + goto out; + + if (mask & CEPH_SETATTR_SIZE) { + r = inode_permission(in, perms, MAY_WRITE); + if (r < 0) + goto out; + } + + r = -CEPHFS_EPERM; + if (mask & CEPH_SETATTR_UID) { + if (perms.uid() != 0 && (perms.uid() != in->uid || stx->stx_uid != in->uid)) + goto out; + } + if (mask & CEPH_SETATTR_GID) { + if (perms.uid() != 0 && (perms.uid() != in->uid || + (!perms.gid_in_groups(stx->stx_gid) && stx->stx_gid != in->gid))) + goto out; + } + + if (mask & CEPH_SETATTR_MODE) { + uint32_t m = ~stx->stx_mode & in->mode; // mode bits removed + ldout(cct, 20) << __func__ << " " << *in << " = " << hex << m << dec << dendl; + if (perms.uid() != 0 && perms.uid() != in->uid && + /* + * Currently the kernel fuse and libfuse code is buggy and + * won't pass the ATTR_KILL_SUID/ATTR_KILL_SGID to ceph-fuse. + * But will just set the ATTR_MODE and at the same time by + * clearing the suid/sgid bits. + * + * Only allow unprivileged users to clear S_ISUID and S_ISUID. + */ + (m & ~(S_ISUID | S_ISGID))) + goto out; + + gid_t i_gid = (mask & CEPH_SETATTR_GID) ? stx->stx_gid : in->gid; + if (perms.uid() != 0 && !perms.gid_in_groups(i_gid)) + stx->stx_mode &= ~S_ISGID; + } + + if (mask & (CEPH_SETATTR_CTIME | CEPH_SETATTR_BTIME | + CEPH_SETATTR_MTIME | CEPH_SETATTR_ATIME)) { + if (perms.uid() != 0 && perms.uid() != in->uid) { + int check_mask = CEPH_SETATTR_CTIME | CEPH_SETATTR_BTIME; + if (!(mask & CEPH_SETATTR_MTIME_NOW)) + check_mask |= CEPH_SETATTR_MTIME; + if (!(mask & CEPH_SETATTR_ATIME_NOW)) + check_mask |= CEPH_SETATTR_ATIME; + if (check_mask & mask) { + goto out; + } else { + r = inode_permission(in, perms, MAY_WRITE); + if (r < 0) + goto out; + } + } + } + r = 0; +out: + ldout(cct, 3) << __func__ << " " << in << " = " << r << dendl; + return r; +} + +int Client::may_open(Inode *in, int flags, const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *in << "; " << perms << dendl; + unsigned want = 0; + + if ((flags & O_ACCMODE) == O_WRONLY) + want = MAY_WRITE; + else if ((flags & O_ACCMODE) == O_RDWR) + want = MAY_READ | MAY_WRITE; + else if ((flags & O_ACCMODE) == O_RDONLY) + want = MAY_READ; + if (flags & O_TRUNC) + want |= MAY_WRITE; + + int r = 0; + switch (in->mode & S_IFMT) { + case S_IFLNK: + r = -CEPHFS_ELOOP; + goto out; + case S_IFDIR: + if (want & MAY_WRITE) { + r = -CEPHFS_EISDIR; + goto out; + } + break; + } + + r = _getattr_for_perm(in, perms); + if (r < 0) + goto out; + + r = inode_permission(in, perms, want); +out: + ldout(cct, 3) << __func__ << " " << in << " = " << r << dendl; + return r; +} + +int Client::may_lookup(Inode *dir, const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *dir << "; " << perms << dendl; + int r = _getattr_for_perm(dir, perms); + if (r < 0) + goto out; + + r = inode_permission(dir, perms, MAY_EXEC); +out: + ldout(cct, 3) << __func__ << " " << dir << " = " << r << dendl; + return r; +} + +int Client::may_create(Inode *dir, const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *dir << "; " << perms << dendl; + int r = _getattr_for_perm(dir, perms); + if (r < 0) + goto out; + + r = inode_permission(dir, perms, MAY_EXEC | MAY_WRITE); +out: + ldout(cct, 3) << __func__ << " " << dir << " = " << r << dendl; + return r; +} + +int Client::may_delete(Inode *dir, const char *name, const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *dir << "; " << "; name " << name << "; " << perms << dendl; + int r = _getattr_for_perm(dir, perms); + if (r < 0) + goto out; + + r = inode_permission(dir, perms, MAY_EXEC | MAY_WRITE); + if (r < 0) + goto out; + + /* 'name == NULL' means rmsnap w/o permission checks */ + if (perms.uid() != 0 && name && (dir->mode & S_ISVTX)) { + InodeRef otherin; + r = _lookup(dir, name, CEPH_CAP_AUTH_SHARED, &otherin, perms); + if (r < 0) + goto out; + if (dir->uid != perms.uid() && otherin->uid != perms.uid()) + r = -CEPHFS_EPERM; + } +out: + ldout(cct, 3) << __func__ << " " << dir << " = " << r << dendl; + return r; +} + +int Client::may_delete(const char *relpath, const UserPerm& perms) { + ldout(cct, 20) << __func__ << " " << relpath << "; " << perms << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + InodeRef dir; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &dir, perms); + if (r < 0) + return r; + if (cct->_conf->client_permissions) { + int r = may_delete(dir.get(), name.c_str(), perms); + if (r < 0) + return r; + } + + return 0; +} + +int Client::may_hardlink(Inode *in, const UserPerm& perms) +{ + ldout(cct, 20) << __func__ << " " << *in << "; " << perms << dendl; + int r = _getattr_for_perm(in, perms); + if (r < 0) + goto out; + + if (perms.uid() == 0 || perms.uid() == in->uid) { + r = 0; + goto out; + } + + r = -CEPHFS_EPERM; + if (!S_ISREG(in->mode)) + goto out; + + if (in->mode & S_ISUID) + goto out; + + if ((in->mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) + goto out; + + r = inode_permission(in, perms, MAY_READ | MAY_WRITE); +out: + ldout(cct, 3) << __func__ << " " << in << " = " << r << dendl; + return r; +} + +int Client::_getattr_for_perm(Inode *in, const UserPerm& perms) +{ + int mask = CEPH_STAT_CAP_MODE; + bool force = false; + if (acl_type != NO_ACL) { + mask |= CEPH_STAT_CAP_XATTR; + force = in->xattr_version == 0; + } + return _getattr(in, mask, perms, force); +} + +vinodeno_t Client::_get_vino(Inode *in) +{ + /* The caller must hold the client lock */ + return vinodeno_t(in->ino, in->snapid); +} + +/** + * Resolve an MDS spec to a list of MDS daemon GIDs. + * + * The spec is a string representing a GID, rank, filesystem:rank, or name/id. + * It may be '*' in which case it matches all GIDs. + * + * If no error is returned, the `targets` vector will be populated with at least + * one MDS. + */ +int Client::resolve_mds( + const std::string &mds_spec, + std::vector<mds_gid_t> *targets) +{ + ceph_assert(fsmap); + ceph_assert(targets != nullptr); + + mds_role_t role; + CachedStackStringStream css; + int role_r = fsmap->parse_role(mds_spec, &role, *css); + if (role_r == 0) { + // We got a role, resolve it to a GID + auto& info = fsmap->get_filesystem(role.fscid)->mds_map.get_info(role.rank); + ldout(cct, 10) << __func__ << ": resolved " << mds_spec << " to role '" + << role << "' aka " << info.human_name() << dendl; + targets->push_back(info.global_id); + return 0; + } + + std::string strtol_err; + long long rank_or_gid = strict_strtoll(mds_spec.c_str(), 10, &strtol_err); + if (strtol_err.empty()) { + // It is a possible GID + const mds_gid_t mds_gid = mds_gid_t(rank_or_gid); + if (fsmap->gid_exists(mds_gid)) { + auto& info = fsmap->get_info_gid(mds_gid); + ldout(cct, 10) << __func__ << ": validated gid " << mds_gid << " aka " + << info.human_name() << dendl; + targets->push_back(mds_gid); + return 0; + } else { + lderr(cct) << __func__ << ": gid " << mds_gid << " not in MDS map" + << dendl; + lderr(cct) << "FSMap: " << *fsmap << dendl; + return -CEPHFS_ENOENT; + } + } else if (mds_spec == "*") { + // It is a wildcard: use all MDSs + const auto& mds_info = fsmap->get_mds_info(); + + ldout(cct, 10) << __func__ << ": resolving `*' to all MDS daemons" << dendl; + if (mds_info.empty()) { + lderr(cct) << __func__ << ": no MDS daemons found" << dendl; + lderr(cct) << "FSMap: " << *fsmap << dendl; + return -CEPHFS_ENOENT; + } + + for (const auto& [gid, info] : mds_info) { + ldout(cct, 10) << __func__ << ": appending " << info.human_name() << " to targets" << dendl; + targets->push_back(gid); + } + return 0; + } else { + // It did not parse as an integer, it is not a wildcard, it must be a name + const mds_gid_t mds_gid = fsmap->find_mds_gid_by_name(mds_spec); + if (mds_gid == mds_gid_t{0}) { + lderr(cct) << __func__ << ": no MDS daemons found by name `" << mds_spec << "'" << dendl; + lderr(cct) << "FSMap: " << *fsmap << dendl; + return -CEPHFS_ENOENT; + } else { + auto& info = fsmap->get_info_gid(mds_gid); + ldout(cct, 10) << __func__ << ": resolved name '" << mds_spec + << "' to " << info.human_name() << dendl; + targets->push_back(mds_gid); + } + return 0; + } +} + + +/** + * Authenticate with mon and establish global ID + */ +int Client::authenticate() +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + if (monclient->is_authenticated()) { + return 0; + } + + client_lock.unlock(); + int r = monclient->authenticate(std::chrono::duration<double>(mount_timeout).count()); + client_lock.lock(); + if (r < 0) { + return r; + } + + whoami = monclient->get_global_id(); + messenger->set_myname(entity_name_t::CLIENT(whoami.v)); + + return 0; +} + +int Client::fetch_fsmap(bool user) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + // Retrieve FSMap to enable looking up daemon addresses. We need FSMap + // rather than MDSMap because no one MDSMap contains all the daemons, and + // a `tell` can address any daemon. + version_t fsmap_latest; + bs::error_code ec; + do { + client_lock.unlock(); + std::tie(fsmap_latest, std::ignore) = + monclient->get_version("fsmap", ca::use_blocked[ec]); + client_lock.lock(); + } while (ec == bs::errc::resource_unavailable_try_again); + + if (ec) { + lderr(cct) << "Failed to learn FSMap version: " << ec << dendl; + return ceph::from_error_code(ec); + } + + ldout(cct, 10) << __func__ << " learned FSMap version " << fsmap_latest << dendl; + + if (user) { + if (!fsmap_user || fsmap_user->get_epoch() < fsmap_latest) { + monclient->sub_want("fsmap.user", fsmap_latest, CEPH_SUBSCRIBE_ONETIME); + monclient->renew_subs(); + wait_on_list(waiting_for_fsmap); + } + ceph_assert(fsmap_user); + ceph_assert(fsmap_user->get_epoch() >= fsmap_latest); + } else { + if (!fsmap || fsmap->get_epoch() < fsmap_latest) { + monclient->sub_want("fsmap", fsmap_latest, CEPH_SUBSCRIBE_ONETIME); + monclient->renew_subs(); + wait_on_list(waiting_for_fsmap); + } + ceph_assert(fsmap); + ceph_assert(fsmap->get_epoch() >= fsmap_latest); + } + ldout(cct, 10) << __func__ << " finished waiting for FSMap version " + << fsmap_latest << dendl; + return 0; +} + +/** + * + * @mds_spec one of ID, rank, GID, "*" + * + */ +int Client::mds_command( + const std::string &mds_spec, + const vector<string>& cmd, + const bufferlist& inbl, + bufferlist *outbl, + string *outs, + Context *onfinish) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + if (!iref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::unique_lock cl(client_lock); + + int r; + r = authenticate(); + if (r < 0) { + return r; + } + + r = fetch_fsmap(false); + if (r < 0) { + return r; + } + + // Look up MDS target(s) of the command + std::vector<mds_gid_t> targets; + r = resolve_mds(mds_spec, &targets); + if (r < 0) { + return r; + } + + // If daemons are laggy, we won't send them commands. If all + // are laggy then we fail. + std::vector<mds_gid_t> non_laggy; + for (const auto& gid : targets) { + const auto info = fsmap->get_info_gid(gid); + if (!info.laggy()) { + non_laggy.push_back(gid); + } + } + if (non_laggy.size() == 0) { + *outs = "All targeted MDS daemons are laggy"; + return -CEPHFS_ENOENT; + } + + if (metadata.empty()) { + // We are called on an unmounted client, so metadata + // won't be initialized yet. + populate_metadata(""); + } + + // Send commands to targets + C_GatherBuilder gather(cct, onfinish); + for (const auto& target_gid : non_laggy) { + const auto info = fsmap->get_info_gid(target_gid); + + // Open a connection to the target MDS + ConnectionRef conn = messenger->connect_to_mds(info.get_addrs()); + + cl.unlock(); + { + std::scoped_lock cmd_lock(command_lock); + // Generate MDSCommandOp state + auto &op = command_table.start_command(); + + op.on_finish = gather.new_sub(); + op.cmd = cmd; + op.outbl = outbl; + op.outs = outs; + op.inbl = inbl; + op.mds_gid = target_gid; + op.con = conn; + + ldout(cct, 4) << __func__ << ": new command op to " << target_gid + << " tid=" << op.tid << cmd << dendl; + + // Construct and send MCommand + MessageRef m = op.get_message(monclient->get_fsid()); + conn->send_message2(std::move(m)); + } + cl.lock(); + } + gather.activate(); + + return 0; +} + +void Client::handle_command_reply(const MConstRef<MCommandReply>& m) +{ + ceph_tid_t const tid = m->get_tid(); + + ldout(cct, 10) << __func__ << ": tid=" << m->get_tid() << dendl; + + std::scoped_lock cmd_lock(command_lock); + if (!command_table.exists(tid)) { + ldout(cct, 1) << __func__ << ": unknown tid " << tid << ", dropping" << dendl; + return; + } + + auto &op = command_table.get_command(tid); + if (op.outbl) { + *op.outbl = m->get_data(); + } + if (op.outs) { + *op.outs = m->rs; + } + + if (op.on_finish) { + op.on_finish->complete(m->r); + } + + command_table.erase(tid); +} + +// ------------------- +// MOUNT + +int Client::subscribe_mdsmap(const std::string &fs_name) +{ + int r = authenticate(); + if (r < 0) { + lderr(cct) << "authentication failed: " << cpp_strerror(r) << dendl; + return r; + } + + std::string resolved_fs_name; + if (fs_name.empty()) { + resolved_fs_name = cct->_conf.get_val<std::string>("client_fs"); + if (resolved_fs_name.empty()) + // Try the backwards compatibility fs name option + resolved_fs_name = cct->_conf.get_val<std::string>("client_mds_namespace"); + } else { + resolved_fs_name = fs_name; + } + + std::string want = "mdsmap"; + if (!resolved_fs_name.empty()) { + r = fetch_fsmap(true); + if (r < 0) + return r; + fscid = fsmap_user->get_fs_cid(resolved_fs_name); + if (fscid == FS_CLUSTER_ID_NONE) { + return -CEPHFS_ENOENT; + } + + std::ostringstream oss; + oss << want << "." << fscid; + want = oss.str(); + } + ldout(cct, 10) << "Subscribing to map '" << want << "'" << dendl; + + monclient->sub_want(want, 0, 0); + monclient->renew_subs(); + + return 0; +} + +int Client::mount(const std::string &mount_root, const UserPerm& perms, + bool require_mds, const std::string &fs_name) +{ + ceph_assert(is_initialized()); + + /* + * To make sure that the _unmount() must wait until the mount() + * is done. + */ + RWRef_t mref_writer(mount_state, CLIENT_MOUNTING, false); + if (!mref_writer.is_first_writer()) // already mounting or mounted + return 0; + + std::unique_lock cl(client_lock); + + int r = subscribe_mdsmap(fs_name); + if (r < 0) { + lderr(cct) << "mdsmap subscription failed: " << cpp_strerror(r) << dendl; + return r; + } + + start_tick_thread(); // start tick thread + + if (require_mds) { + while (1) { + auto availability = mdsmap->is_cluster_available(); + if (availability == MDSMap::STUCK_UNAVAILABLE) { + // Error out + ldout(cct, 10) << "mds cluster unavailable: epoch=" << mdsmap->get_epoch() << dendl; + return CEPH_FUSE_NO_MDS_UP; + } else if (availability == MDSMap::AVAILABLE) { + // Continue to mount + break; + } else if (availability == MDSMap::TRANSIENT_UNAVAILABLE) { + // Else, wait. MDSMonitor will update the map to bring + // us to a conclusion eventually. + wait_on_list(waiting_for_mdsmap); + } else { + // Unexpected value! + ceph_abort(); + } + } + } + + if(mdsmap->test_flag(CEPH_MDSMAP_REFUSE_CLIENT_SESSION)) { + lderr(cct) << "connections cannot be made while" + " the flag refuse_client_session is set" << dendl; + return -CEPHFS_EACCES; + } + + populate_metadata(mount_root.empty() ? "/" : mount_root); + + filepath fp(CEPH_INO_ROOT); + if (!mount_root.empty()) { + fp = filepath(mount_root.c_str()); + } + while (true) { + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_GETATTR); + req->set_filepath(fp); + req->head.args.getattr.mask = CEPH_STAT_CAP_INODE_ALL; + int res = make_request(req, perms); + if (res < 0) { + if (res == -CEPHFS_EACCES && root) { + ldout(cct, 1) << __func__ << " EACCES on parent of mount point; quotas may not work" << dendl; + break; + } + return res; + } + + if (fp.depth()) + fp.pop_dentry(); + else + break; + } + + ceph_assert(root); + _ll_get(root.get()); + + // trace? + if (!cct->_conf->client_trace.empty()) { + traceout.open(cct->_conf->client_trace.c_str()); + if (traceout.is_open()) { + ldout(cct, 1) << "opened trace file '" << cct->_conf->client_trace << "'" << dendl; + } else { + ldout(cct, 1) << "FAILED to open trace file '" << cct->_conf->client_trace << "'" << dendl; + } + } + + /* + ldout(cct, 3) << "op: // client trace data structs" << dendl; + ldout(cct, 3) << "op: struct stat st;" << dendl; + ldout(cct, 3) << "op: struct utimbuf utim;" << dendl; + ldout(cct, 3) << "op: int readlinkbuf_len = 1000;" << dendl; + ldout(cct, 3) << "op: char readlinkbuf[readlinkbuf_len];" << dendl; + ldout(cct, 3) << "op: map<string, inode_t*> dir_contents;" << dendl; + ldout(cct, 3) << "op: map<int, int> open_files;" << dendl; + ldout(cct, 3) << "op: int fd;" << dendl; + */ + + mref_writer.update_state(CLIENT_MOUNTED); + return 0; +} + +// UNMOUNT + +void Client::_close_sessions() +{ + for (auto it = mds_sessions.begin(); it != mds_sessions.end(); ) { + if (it->second->state == MetaSession::STATE_REJECTED) + mds_sessions.erase(it++); + else + ++it; + } + + while (!mds_sessions.empty()) { + // send session closes! + for (auto &p : mds_sessions) { + if (p.second->state != MetaSession::STATE_CLOSING) { + _close_mds_session(p.second.get()); + mds_ranks_closing.insert(p.first); + } + } + + // wait for sessions to close + double timo = cct->_conf.get_val<std::chrono::seconds>("client_shutdown_timeout").count(); + ldout(cct, 2) << "waiting for " << mds_ranks_closing.size() << " mds session(s) to close (timeout: " + << timo << "s)" << dendl; + std::unique_lock l{client_lock, std::adopt_lock}; + if (!timo) { + mount_cond.wait(l); + } else if (!mount_cond.wait_for(l, ceph::make_timespan(timo), [this] { return mds_ranks_closing.empty(); })) { + ldout(cct, 1) << mds_ranks_closing.size() << " mds(s) did not respond to session close -- timing out." << dendl; + while (!mds_ranks_closing.empty()) { + auto session = mds_sessions.at(*mds_ranks_closing.begin()); + // this prunes entry from mds_sessions and mds_ranks_closing + _closed_mds_session(session.get(), -CEPHFS_ETIMEDOUT); + } + } + + mds_ranks_closing.clear(); + l.release(); + } +} + +void Client::flush_mdlog_sync(Inode *in) +{ + if (in->unsafe_ops.empty()) { + return; + } + + std::set<mds_rank_t> anchor; + for (auto &&p : in->unsafe_ops) { + anchor.emplace(p->mds); + } + if (in->auth_cap) { + anchor.emplace(in->auth_cap->session->mds_num); + } + + for (auto &rank : anchor) { + auto session = &mds_sessions.at(rank); + flush_mdlog(session->get()); + } +} + +void Client::flush_mdlog_sync() +{ + if (mds_requests.empty()) + return; + for (auto &p : mds_sessions) { + flush_mdlog(p.second.get()); + } +} + +void Client::flush_mdlog(MetaSession *session) +{ + // Only send this to Luminous or newer MDS daemons, older daemons + // will crash if they see an unknown CEPH_SESSION_* value in this msg. + const uint64_t features = session->con->get_features(); + if (HAVE_FEATURE(features, SERVER_LUMINOUS)) { + auto m = make_message<MClientSession>(CEPH_SESSION_REQUEST_FLUSH_MDLOG); + session->con->send_message2(std::move(m)); + } +} + + +void Client::_abort_mds_sessions(int err) +{ + for (auto p = mds_requests.begin(); p != mds_requests.end(); ) { + auto req = p->second; + ++p; + // unsafe requests will be removed during close session below. + if (req->got_unsafe) + continue; + + req->abort(err); + if (req->caller_cond) { + req->kick = true; + req->caller_cond->notify_all(); + } + } + + // Process aborts on any requests that were on this waitlist. + // Any requests that were on a waiting_for_open session waitlist + // will get kicked during close session below. + signal_cond_list(waiting_for_mdsmap); + + // Force-close all sessions + while(!mds_sessions.empty()) { + auto session = mds_sessions.begin()->second; + _closed_mds_session(session.get(), err); + } +} + +void Client::_unmount(bool abort) +{ + /* + * We are unmounting the client. + * + * Just declare the state to STATE_UNMOUNTING to block and fail + * any new comming "reader" and then try to wait all the in-flight + * "readers" to finish. + */ + RWRef_t mref_writer(mount_state, CLIENT_UNMOUNTING, false); + if (!mref_writer.is_first_writer()) + return; + mref_writer.wait_readers_done(); + + std::unique_lock lock{client_lock}; + + if (abort || blocklisted) { + ldout(cct, 2) << "unmounting (" << (abort ? "abort)" : "blocklisted)") << dendl; + } else { + ldout(cct, 2) << "unmounting" << dendl; + } + + deleg_timeout = 0; + + if (abort) { + mount_aborted = true; + // Abort all mds sessions + _abort_mds_sessions(-CEPHFS_ENOTCONN); + + objecter->op_cancel_writes(-CEPHFS_ENOTCONN); + } else { + // flush the mdlog for pending requests, if any + flush_mdlog_sync(); + } + + mount_cond.wait(lock, [this] { + // Only wait for write OPs + for (auto& [tid, req] : mds_requests) { + if (req->is_write()) { + ldout(cct, 10) << "waiting for write request '" << tid + << "' to complete, currently there are " + << mds_requests.size() + << " outstanding read/write requests" + << dendl; + return false; + } + } + return true; + }); + + cwd.reset(); + root.reset(); + + // clean up any unclosed files + while (!fd_map.empty()) { + Fh *fh = fd_map.begin()->second; + fd_map.erase(fd_map.begin()); + ldout(cct, 0) << " destroyed lost open file " << fh << " on " << *fh->inode << dendl; + _release_fh(fh); + } + + while (!ll_unclosed_fh_set.empty()) { + set<Fh*>::iterator it = ll_unclosed_fh_set.begin(); + Fh *fh = *it; + ll_unclosed_fh_set.erase(fh); + ldout(cct, 0) << " destroyed lost open file " << fh << " on " << *(fh->inode) << dendl; + _release_fh(fh); + } + + while (!opened_dirs.empty()) { + dir_result_t *dirp = *opened_dirs.begin(); + ldout(cct, 0) << " destroyed lost open dir " << dirp << " on " << *dirp->inode << dendl; + _closedir(dirp); + } + + _ll_drop_pins(); + + if (cct->_conf->client_oc) { + // flush/release all buffered data + std::list<InodeRef> anchor; + for (auto& p : inode_map) { + Inode *in = p.second; + if (!in) { + ldout(cct, 0) << "null inode_map entry ino " << p.first << dendl; + ceph_assert(in); + } + + // prevent inode from getting freed + anchor.emplace_back(in); + + if (abort || blocklisted) { + objectcacher->purge_set(&in->oset); + } else if (!in->caps.empty()) { + _release(in); + _flush(in, new C_Client_FlushComplete(this, in)); + } + } + } + + if (abort || blocklisted) { + for (auto &q : mds_sessions) { + auto s = q.second; + for (auto p = s->dirty_list.begin(); !p.end(); ) { + Inode *in = *p; + ++p; + if (in->dirty_caps) { + ldout(cct, 0) << " drop dirty caps on " << *in << dendl; + in->mark_caps_clean(); + put_inode(in); + } + } + } + } else { + flush_caps_sync(); + wait_sync_caps(last_flush_tid); + } + + // empty lru cache + trim_cache(); + + delay_put_inodes(); + + while (lru.lru_get_size() > 0 || + !inode_map.empty()) { + ldout(cct, 2) << "cache still has " << lru.lru_get_size() + << "+" << inode_map.size() << " items" + << ", waiting (for caps to release?)" + << dendl; + + if (auto r = mount_cond.wait_for(lock, ceph::make_timespan(5)); + r == std::cv_status::timeout) { + dump_cache(NULL); + } + } + ceph_assert(lru.lru_get_size() == 0); + ceph_assert(inode_map.empty()); + + // stop tracing + if (!cct->_conf->client_trace.empty()) { + ldout(cct, 1) << "closing trace file '" << cct->_conf->client_trace << "'" << dendl; + traceout.close(); + } + + // stop the tick thread + tick_thread_stopped = true; + upkeep_cond.notify_one(); + + _close_sessions(); + + // release the global snapshot realm + SnapRealm *global_realm = snap_realms[CEPH_INO_GLOBAL_SNAPREALM]; + if (global_realm) { + ceph_assert(global_realm->nref == 1); + put_snap_realm(global_realm); + } + + mref_writer.update_state(CLIENT_UNMOUNTED); + + /* + * Stop the remount_queue before clearing the mountpoint memory + * to avoid possible use-after-free bug. + */ + if (remount_cb) { + ldout(cct, 10) << "unmount stopping remount finisher" << dendl; + remount_finisher.wait_for_empty(); + remount_finisher.stop(); + remount_cb = nullptr; + } + + ldout(cct, 2) << "unmounted." << dendl; +} + +void Client::unmount() +{ + _unmount(false); +} + +void Client::abort_conn() +{ + _unmount(true); +} + +void Client::flush_cap_releases() +{ + uint64_t nr_caps = 0; + + // send any cap releases + for (auto &p : mds_sessions) { + auto session = p.second; + if (session->release && mdsmap->is_clientreplay_or_active_or_stopping( + p.first)) { + nr_caps += session->release->caps.size(); + if (cct->_conf->client_inject_release_failure) { + ldout(cct, 20) << __func__ << " injecting failure to send cap release message" << dendl; + } else { + session->con->send_message2(std::move(session->release)); + } + session->release.reset(); + } + } + + if (nr_caps > 0) { + dec_pinned_icaps(nr_caps); + } +} + +void Client::renew_and_flush_cap_releases() +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + if (!mount_aborted && mdsmap->get_epoch()) { + // renew caps? + auto el = ceph::coarse_mono_clock::now() - last_cap_renew; + if (unlikely(utime_t(el) > mdsmap->get_session_timeout() / 3.0)) + renew_caps(); + + flush_cap_releases(); + } +} + +void Client::tick() +{ + ldout(cct, 20) << "tick" << dendl; + + auto now = ceph::coarse_mono_clock::now(); + + /* + * If the mount() is not finished + */ + if (is_mounting() && !mds_requests.empty()) { + MetaRequest *req = mds_requests.begin()->second; + + if (req->created + mount_timeout < now) { + req->abort(-CEPHFS_ETIMEDOUT); + if (req->caller_cond) { + req->kick = true; + req->caller_cond->notify_all(); + } + signal_cond_list(waiting_for_mdsmap); + for (auto &p : mds_sessions) { + signal_context_list(p.second->waiting_for_open); + } + } + } + + renew_and_flush_cap_releases(); + + // delayed caps + xlist<Inode*>::iterator p = delayed_list.begin(); + while (!p.end()) { + Inode *in = *p; + ++p; + if (!mount_aborted && in->hold_caps_until > now) + break; + delayed_list.pop_front(); + if (!mount_aborted) + check_caps(in, CHECK_CAPS_NODELAY); + } + + if (!mount_aborted) + collect_and_send_metrics(); + + delay_put_inodes(is_unmounting()); + trim_cache(true); + + if (blocklisted && (is_mounted() || is_unmounting()) && + last_auto_reconnect + std::chrono::seconds(30 * 60) < now && + cct->_conf.get_val<bool>("client_reconnect_stale")) { + messenger->client_reset(); + fd_gen++; // invalidate open files + blocklisted = false; + _kick_stale_sessions(); + last_auto_reconnect = now; + } +} + +void Client::start_tick_thread() +{ + upkeeper = std::thread([this]() { + using time = ceph::coarse_mono_time; + using sec = std::chrono::seconds; + + auto last_tick = time::min(); + + std::unique_lock cl(client_lock); + while (!tick_thread_stopped) { + auto now = clock::now(); + auto since = now - last_tick; + + auto t_interval = clock::duration(cct->_conf.get_val<sec>("client_tick_interval")); + auto d_interval = clock::duration(cct->_conf.get_val<sec>("client_debug_inject_tick_delay")); + + auto interval = std::max(t_interval, d_interval); + if (likely(since >= interval*.90)) { + tick(); + last_tick = clock::now(); + } else { + interval -= since; + } + + ldout(cct, 20) << "upkeep thread waiting interval " << interval << dendl; + if (!tick_thread_stopped) + upkeep_cond.wait_for(cl, interval); + } + }); +} + +void Client::collect_and_send_metrics() { + ldout(cct, 20) << __func__ << dendl; + + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + // right now, we only track and send global metrics. its sufficient + // to send these metrics to MDS rank0. + collect_and_send_global_metrics(); +} + +void Client::collect_and_send_global_metrics() { + ldout(cct, 20) << __func__ << dendl; + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + /* Do not send the metrics until the MDS rank is ready */ + if (!mdsmap->is_active((mds_rank_t)0)) { + ldout(cct, 5) << __func__ << " MDS rank 0 is not ready yet -- not sending metric" + << dendl; + return; + } + + if (!have_open_session((mds_rank_t)0)) { + ldout(cct, 5) << __func__ << ": no session with rank=0 -- not sending metric" + << dendl; + return; + } + auto session = _get_or_open_mds_session((mds_rank_t)0); + if (!session->mds_features.test(CEPHFS_FEATURE_METRIC_COLLECT)) { + ldout(cct, 5) << __func__ << ": rank=0 does not support metrics" << dendl; + return; + } + + ClientMetricMessage metric; + std::vector<ClientMetricMessage> message; + + // read latency + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_READ_LATENCY)) { + metric = ClientMetricMessage(ReadLatencyPayload(logger->tget(l_c_read), + logger->tget(l_c_rd_avg), + logger->get(l_c_rd_sqsum), + nr_read_request)); + message.push_back(metric); + } + + // write latency + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_WRITE_LATENCY)) { + metric = ClientMetricMessage(WriteLatencyPayload(logger->tget(l_c_wrlat), + logger->tget(l_c_wr_avg), + logger->get(l_c_wr_sqsum), + nr_write_request)); + message.push_back(metric); + } + + // metadata latency + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_METADATA_LATENCY)) { + metric = ClientMetricMessage(MetadataLatencyPayload(logger->tget(l_c_lat), + logger->tget(l_c_md_avg), + logger->get(l_c_md_sqsum), + nr_metadata_request)); + message.push_back(metric); + } + + // cap hit ratio -- nr_caps is unused right now + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_CAP_INFO)) { + auto [cap_hits, cap_misses] = get_cap_hit_rates(); + metric = ClientMetricMessage(CapInfoPayload(cap_hits, cap_misses, 0)); + message.push_back(metric); + } + + // dentry lease hit ratio + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_DENTRY_LEASE)) { + auto [dlease_hits, dlease_misses, nr] = get_dlease_hit_rates(); + metric = ClientMetricMessage(DentryLeasePayload(dlease_hits, dlease_misses, nr)); + message.push_back(metric); + } + + // opened files + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_OPENED_FILES)) { + auto [opened_files, total_inodes] = get_opened_files_rates(); + metric = ClientMetricMessage(OpenedFilesPayload(opened_files, total_inodes)); + message.push_back(metric); + } + + // pinned i_caps + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_PINNED_ICAPS)) { + auto [pinned_icaps, total_inodes] = get_pinned_icaps_rates(); + metric = ClientMetricMessage(PinnedIcapsPayload(pinned_icaps, total_inodes)); + message.push_back(metric); + } + + // opened inodes + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_OPENED_INODES)) { + auto [opened_inodes, total_inodes] = get_opened_inodes_rates(); + metric = ClientMetricMessage(OpenedInodesPayload(opened_inodes, total_inodes)); + message.push_back(metric); + } + + // read io sizes + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_READ_IO_SIZES)) { + metric = ClientMetricMessage(ReadIoSizesPayload(total_read_ops, + total_read_size)); + message.push_back(metric); + } + + // write io sizes + if (_collect_and_send_global_metrics || + session->mds_metric_flags.test(CLIENT_METRIC_TYPE_WRITE_IO_SIZES)) { + metric = ClientMetricMessage(WriteIoSizesPayload(total_write_ops, + total_write_size)); + message.push_back(metric); + } + + session->con->send_message2(make_message<MClientMetrics>(std::move(message))); +} + +void Client::renew_caps() +{ + ldout(cct, 10) << "renew_caps()" << dendl; + last_cap_renew = ceph::coarse_mono_clock::now(); + + for (auto &p : mds_sessions) { + ldout(cct, 15) << "renew_caps requesting from mds." << p.first << dendl; + if (mdsmap->get_state(p.first) >= MDSMap::STATE_REJOIN) + renew_caps(p.second.get()); + } +} + +void Client::renew_caps(MetaSession *session) +{ + ldout(cct, 10) << "renew_caps mds." << session->mds_num << dendl; + session->last_cap_renew_request = ceph_clock_now(); + uint64_t seq = ++session->cap_renew_seq; + session->con->send_message2(make_message<MClientSession>(CEPH_SESSION_REQUEST_RENEWCAPS, seq)); +} + + +// =============================================================== +// high level (POSIXy) interface + +int Client::_do_lookup(Inode *dir, const string& name, int mask, + InodeRef *target, const UserPerm& perms) +{ + int op = dir->snapid == CEPH_SNAPDIR ? CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; + MetaRequest *req = new MetaRequest(op); + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_inode(dir); + if (cct->_conf->client_debug_getattr_caps && op == CEPH_MDS_OP_LOOKUP) + mask |= DEBUG_GETATTR_CAPS; + req->head.args.getattr.mask = mask; + + ldout(cct, 10) << __func__ << " on " << path << dendl; + + int r = make_request(req, perms, target); + ldout(cct, 10) << __func__ << " res is " << r << dendl; + return r; +} + +bool Client::_dentry_valid(const Dentry *dn) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + // is dn lease valid? + utime_t now = ceph_clock_now(); + if (dn->lease_mds >= 0 && dn->lease_ttl > now && + mds_sessions.count(dn->lease_mds)) { + auto s = mds_sessions.at(dn->lease_mds); + if (s->cap_ttl > now && s->cap_gen == dn->lease_gen) { + dlease_hit(); + return true; + } + + ldout(cct, 20) << " bad lease, cap_ttl " << s->cap_ttl << ", cap_gen " << s->cap_gen + << " vs lease_gen " << dn->lease_gen << dendl; + } + + dlease_miss(); + return false; +} + +int Client::_lookup(Inode *dir, const string& dname, int mask, InodeRef *target, + const UserPerm& perms, std::string* alternate_name, + bool is_rename) +{ + int r = 0; + Dentry *dn = NULL; + bool did_lookup_request = false; + // can only request shared caps + mask &= CEPH_CAP_ANY_SHARED | CEPH_STAT_RSTAT; + + if (dname == "..") { + if (dir->dentries.empty()) { + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPPARENT); + filepath path(dir->ino); + req->set_filepath(path); + + InodeRef tmptarget; + int r = make_request(req, perms, &tmptarget, NULL, rand() % mdsmap->get_num_in_mds()); + + if (r == 0) { + *target = std::move(tmptarget); + ldout(cct, 8) << __func__ << " found target " << (*target)->ino << dendl; + } else { + *target = dir; + } + } + else + *target = dir->get_first_parent()->dir->parent_inode; //dirs can't be hard-linked + goto done; + } + + if (dname == ".") { + *target = dir; + goto done; + } + + if (!dir->is_dir()) { + r = -CEPHFS_ENOTDIR; + goto done; + } + + if (dname.length() > NAME_MAX) { + r = -CEPHFS_ENAMETOOLONG; + goto done; + } + + if (dname == cct->_conf->client_snapdir && + dir->snapid == CEPH_NOSNAP) { + *target = open_snapdir(dir); + goto done; + } + +relookup: + if (dir->dir && + dir->dir->dentries.count(dname)) { + dn = dir->dir->dentries[dname]; + + ldout(cct, 20) << __func__ << " have " << *dn << " from mds." << dn->lease_mds + << " ttl " << dn->lease_ttl << " seq " << dn->lease_seq << dendl; + + if (!dn->inode || dn->inode->caps_issued_mask(mask, true)) { + if (_dentry_valid(dn)) { + // touch this mds's dir cap too, even though we don't _explicitly_ use it here, to + // make trim_caps() behave. + dir->try_touch_cap(dn->lease_mds); + goto hit_dn; + } + // dir shared caps? + if (dir->caps_issued_mask(CEPH_CAP_FILE_SHARED, true)) { + if (dn->cap_shared_gen == dir->shared_gen && + (!dn->inode || dn->inode->caps_issued_mask(mask, true))) + goto hit_dn; + if (!dn->inode && (dir->flags & I_COMPLETE)) { + ldout(cct, 10) << __func__ << " concluded ENOENT locally for " + << *dir << " dn '" << dname << "'" << dendl; + return -CEPHFS_ENOENT; + } + } + } else { + ldout(cct, 20) << " no cap on " << dn->inode->vino() << dendl; + } + + // In rare case during the rename if another thread tries to + // lookup the dst dentry, it may get an inconsistent result + // that both src dentry and dst dentry will link to the same + // inode at the same time. + // Will wait the rename to finish and try it again. + if (!is_rename && dn->is_renaming) { + ldout(cct, 1) << __func__ << " dir " << *dir + << " rename is on the way, will wait for dn '" + << dname << "'" << dendl; + wait_on_list(waiting_for_rename); + goto relookup; + } + } else { + // can we conclude ENOENT locally? + if (dir->caps_issued_mask(CEPH_CAP_FILE_SHARED, true) && + (dir->flags & I_COMPLETE)) { + ldout(cct, 10) << __func__ << " concluded ENOENT locally for " << *dir << " dn '" << dname << "'" << dendl; + return -CEPHFS_ENOENT; + } + } + + if (did_lookup_request) { + r = 0; + goto done; + } + r = _do_lookup(dir, dname, mask, target, perms); + did_lookup_request = true; + if (r == 0) { + /* complete lookup to get dentry for alternate_name */ + goto relookup; + } else { + goto done; + } + + hit_dn: + if (dn->inode) { + *target = dn->inode; + if (alternate_name) + *alternate_name = dn->alternate_name; + } else { + r = -CEPHFS_ENOENT; + } + touch_dn(dn); + goto done; + + done: + if (r < 0) + ldout(cct, 10) << __func__ << " " << *dir << " " << dname << " = " << r << dendl; + else + ldout(cct, 10) << __func__ << " " << *dir << " " << dname << " = " << **target << dendl; + return r; +} + +Dentry *Client::get_or_create(Inode *dir, const char* name) +{ + // lookup + ldout(cct, 20) << __func__ << " " << *dir << " name " << name << dendl; + dir->open_dir(); + if (dir->dir->dentries.count(name)) + return dir->dir->dentries[name]; + else // otherwise link up a new one + return link(dir->dir, name, NULL, NULL); +} + +int Client::walk(std::string_view path, walk_dentry_result* wdr, const UserPerm& perms, bool followsym) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 10) << __func__ << ": " << path << dendl; + + std::scoped_lock lock(client_lock); + + return path_walk(path, wdr, perms, followsym); +} + +int Client::path_walk(const filepath& origpath, InodeRef *end, + const UserPerm& perms, bool followsym, int mask, InodeRef dirinode) +{ + walk_dentry_result wdr; + int rc = path_walk(origpath, &wdr, perms, followsym, mask, dirinode); + *end = std::move(wdr.in); + return rc; +} + +int Client::path_walk(const filepath& origpath, walk_dentry_result* result, const UserPerm& perms, + bool followsym, int mask, InodeRef dirinode) +{ + filepath path = origpath; + InodeRef cur; + std::string alternate_name; + if (origpath.absolute()) + cur = root; + else if (!dirinode) + cur = cwd; + else { + cur = dirinode; + } + ceph_assert(cur); + + ldout(cct, 20) << __func__ << " cur=" << *cur << dendl; + ldout(cct, 10) << __func__ << " " << path << dendl; + + int symlinks = 0; + + unsigned i=0; + while (i < path.depth() && cur) { + int caps = 0; + const string &dname = path[i]; + ldout(cct, 10) << " " << i << " " << *cur << " " << dname << dendl; + ldout(cct, 20) << " (path is " << path << ")" << dendl; + InodeRef next; + if (cct->_conf->client_permissions) { + int r = may_lookup(cur.get(), perms); + if (r < 0) + return r; + caps = CEPH_CAP_AUTH_SHARED; + } + + /* Get extra requested caps on the last component */ + if (i == (path.depth() - 1)) + caps |= mask; + int r = _lookup(cur.get(), dname, caps, &next, perms, &alternate_name); + if (r < 0) + return r; + // only follow trailing symlink if followsym. always follow + // 'directory' symlinks. + if (next && next->is_symlink()) { + symlinks++; + ldout(cct, 20) << " symlink count " << symlinks << ", value is '" << next->symlink << "'" << dendl; + if (symlinks > MAXSYMLINKS) { + return -CEPHFS_ELOOP; + } + + if (i < path.depth() - 1) { + // dir symlink + // replace consumed components of path with symlink dir target + filepath resolved(next->symlink.c_str()); + resolved.append(path.postfixpath(i + 1)); + path = resolved; + i = 0; + if (next->symlink[0] == '/') { + cur = root; + } + continue; + } else if (followsym) { + if (next->symlink[0] == '/') { + path = next->symlink.c_str(); + i = 0; + // reset position + cur = root; + } else { + filepath more(next->symlink.c_str()); + // we need to remove the symlink component from off of the path + // before adding the target that the symlink points to. remain + // at the same position in the path. + path.pop_dentry(); + path.append(more); + } + continue; + } + } + cur.swap(next); + i++; + } + if (!cur) + return -CEPHFS_ENOENT; + if (result) { + result->in = std::move(cur); + result->alternate_name = std::move(alternate_name); + } + return 0; +} + + +// namespace ops + +int Client::link(const char *relexisting, const char *relpath, const UserPerm& perm, std::string alternate_name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "link" << std::endl; + tout(cct) << relexisting << std::endl; + tout(cct) << relpath << std::endl; + + filepath existing(relexisting); + + InodeRef in, dir; + + std::scoped_lock lock(client_lock); + int r = path_walk(existing, &in, perm, true); + if (r < 0) + return r; + if (std::string(relpath) == "/") { + r = -CEPHFS_EEXIST; + return r; + } + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + + r = path_walk(path, &dir, perm, true); + if (r < 0) + return r; + if (cct->_conf->client_permissions) { + if (S_ISDIR(in->mode)) { + r = -CEPHFS_EPERM; + return r; + } + r = may_hardlink(in.get(), perm); + if (r < 0) + return r; + r = may_create(dir.get(), perm); + if (r < 0) + return r; + } + r = _link(in.get(), dir.get(), name.c_str(), perm, std::move(alternate_name)); + return r; +} + +int Client::unlink(const char *relpath, const UserPerm& perm) +{ + return unlinkat(CEPHFS_AT_FDCWD, relpath, 0, perm); +} + +int Client::unlinkat(int dirfd, const char *relpath, int flags, const UserPerm& perm) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << flags << std::endl; + + if (std::string(relpath) == "/") { + return flags & AT_REMOVEDIR ? -CEPHFS_EBUSY : -CEPHFS_EISDIR; + } + + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + InodeRef dir; + + std::scoped_lock lock(client_lock); + + InodeRef dirinode; + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + r = path_walk(path, &dir, perm, true, 0, dirinode); + if (r < 0) { + return r; + } + if (cct->_conf->client_permissions) { + r = may_delete(dir.get(), name.c_str(), perm); + if (r < 0) { + return r; + } + } + if (flags & AT_REMOVEDIR) { + r = _rmdir(dir.get(), name.c_str(), perm); + } else { + r = _unlink(dir.get(), name.c_str(), perm); + } + return r; +} + +int Client::rename(const char *relfrom, const char *relto, const UserPerm& perm, std::string alternate_name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relfrom << std::endl; + tout(cct) << relto << std::endl; + + if (std::string(relfrom) == "/" || std::string(relto) == "/") + return -CEPHFS_EBUSY; + + filepath from(relfrom); + filepath to(relto); + string fromname = from.last_dentry(); + from.pop_dentry(); + string toname = to.last_dentry(); + to.pop_dentry(); + + InodeRef fromdir, todir; + + std::scoped_lock lock(client_lock); + int r = path_walk(from, &fromdir, perm); + if (r < 0) + goto out; + r = path_walk(to, &todir, perm); + if (r < 0) + goto out; + + if (cct->_conf->client_permissions) { + int r = may_delete(fromdir.get(), fromname.c_str(), perm); + if (r < 0) + return r; + r = may_delete(todir.get(), toname.c_str(), perm); + if (r < 0 && r != -CEPHFS_ENOENT) + return r; + } + r = _rename(fromdir.get(), fromname.c_str(), todir.get(), toname.c_str(), perm, std::move(alternate_name)); +out: + return r; +} + +// dirs + +int Client::mkdir(const char *relpath, mode_t mode, const UserPerm& perm, std::string alternate_name) +{ + return mkdirat(CEPHFS_AT_FDCWD, relpath, mode, perm, alternate_name); +} + +int Client::mkdirat(int dirfd, const char *relpath, mode_t mode, const UserPerm& perm, + std::string alternate_name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mode << std::endl; + ldout(cct, 10) << __func__ << ": " << relpath << dendl; + + if (std::string(relpath) == "/") { + return -CEPHFS_EEXIST; + } + + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + InodeRef dir; + + std::scoped_lock lock(client_lock); + + InodeRef dirinode; + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + r = path_walk(path, &dir, perm, true, 0, dirinode); + if (r < 0) { + return r; + } + if (cct->_conf->client_permissions) { + r = may_create(dir.get(), perm); + if (r < 0) { + return r; + } + } + return _mkdir(dir.get(), name.c_str(), mode, perm, 0, {}, std::move(alternate_name)); +} + +int Client::mkdirs(const char *relpath, mode_t mode, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 10) << "Client::mkdirs " << relpath << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mode << std::endl; + + //get through existing parts of path + filepath path(relpath); + unsigned int i; + int r = 0, caps = 0; + InodeRef cur, next; + + std::scoped_lock lock(client_lock); + cur = cwd; + for (i=0; i<path.depth(); ++i) { + if (cct->_conf->client_permissions) { + r = may_lookup(cur.get(), perms); + if (r < 0) + break; + caps = CEPH_CAP_AUTH_SHARED; + } + r = _lookup(cur.get(), path[i].c_str(), caps, &next, perms); + if (r < 0) + break; + cur.swap(next); + } + if (r!=-CEPHFS_ENOENT) return r; + ldout(cct, 20) << __func__ << " got through " << i << " directories on path " << relpath << dendl; + //make new directory at each level + for (; i<path.depth(); ++i) { + if (cct->_conf->client_permissions) { + r = may_create(cur.get(), perms); + if (r < 0) + return r; + } + //make new dir + r = _mkdir(cur.get(), path[i].c_str(), mode, perms, &next); + + //check proper creation/existence + if(-CEPHFS_EEXIST == r && i < path.depth() - 1) { + r = _lookup(cur.get(), path[i].c_str(), CEPH_CAP_AUTH_SHARED, &next, perms); + } + if (r < 0) + return r; + //move to new dir and continue + cur.swap(next); + ldout(cct, 20) << __func__ << ": successfully created directory " + << filepath(cur->ino).get_path() << dendl; + } + return 0; +} + +int Client::rmdir(const char *relpath, const UserPerm& perms) +{ + return unlinkat(CEPHFS_AT_FDCWD, relpath, AT_REMOVEDIR, perms); +} + +int Client::mknod(const char *relpath, mode_t mode, const UserPerm& perms, dev_t rdev) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mode << std::endl; + tout(cct) << rdev << std::endl; + + if (std::string(relpath) == "/") + return -CEPHFS_EEXIST; + + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + InodeRef dir; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &dir, perms); + if (r < 0) + return r; + if (cct->_conf->client_permissions) { + int r = may_create(dir.get(), perms); + if (r < 0) + return r; + } + return _mknod(dir.get(), name.c_str(), mode, rdev, perms); +} + +// symlinks + +int Client::symlink(const char *target, const char *relpath, const UserPerm& perms, std::string alternate_name) +{ + return symlinkat(target, CEPHFS_AT_FDCWD, relpath, perms, alternate_name); +} + +int Client::symlinkat(const char *target, int dirfd, const char *relpath, const UserPerm& perms, + std::string alternate_name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << target << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + + if (std::string(relpath) == "/") { + return -CEPHFS_EEXIST; + } + + filepath path(relpath); + string name = path.last_dentry(); + path.pop_dentry(); + InodeRef dir; + + std::scoped_lock lock(client_lock); + + InodeRef dirinode; + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + r = path_walk(path, &dir, perms, true, 0, dirinode); + if (r < 0) { + return r; + } + if (cct->_conf->client_permissions) { + int r = may_create(dir.get(), perms); + if (r < 0) { + return r; + } + } + return _symlink(dir.get(), name.c_str(), target, perms, std::move(alternate_name)); +} + +int Client::readlink(const char *relpath, char *buf, loff_t size, const UserPerm& perms) +{ + return readlinkat(CEPHFS_AT_FDCWD, relpath, buf, size, perms); +} + +int Client::readlinkat(int dirfd, const char *relpath, char *buf, loff_t size, const UserPerm& perms) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + + InodeRef dirinode; + std::scoped_lock lock(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + InodeRef in; + filepath path(relpath); + r = path_walk(path, &in, perms, false, 0, dirinode); + if (r < 0) { + return r; + } + + return _readlink(in.get(), buf, size); +} + +int Client::_readlink(Inode *in, char *buf, size_t size) +{ + if (!in->is_symlink()) + return -CEPHFS_EINVAL; + + // copy into buf (at most size bytes) + int r = in->symlink.length(); + if (r > (int)size) + r = size; + memcpy(buf, in->symlink.c_str(), r); + return r; +} + + +// inode stuff + +int Client::_getattr(Inode *in, int mask, const UserPerm& perms, bool force) +{ + bool yes = in->caps_issued_mask(mask, true); + + ldout(cct, 10) << __func__ << " mask " << ccap_string(mask) << " issued=" << yes << dendl; + if (yes && !force) + return 0; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_GETATTR); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(in); + req->head.args.getattr.mask = mask; + + int res = make_request(req, perms); + ldout(cct, 10) << __func__ << " result=" << res << dendl; + return res; +} + +int Client::_getvxattr( + Inode *in, + const UserPerm& perms, + const char *xattr_name, + ssize_t size, + void *value, + mds_rank_t rank) +{ + if (!xattr_name || strlen(xattr_name) <= 0 || strlen(xattr_name) > 255) { + return -CEPHFS_ENODATA; + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_GETVXATTR); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(in); + req->set_string2(xattr_name); + + bufferlist bl; + int res = make_request(req, perms, nullptr, nullptr, rank, &bl, + CEPHFS_FEATURE_OP_GETVXATTR); + ldout(cct, 10) << __func__ << " result=" << res << dendl; + + if (res < 0) { + if (res == -CEPHFS_EOPNOTSUPP) { + return -CEPHFS_ENODATA; + } + return res; + } + + std::string buf; + auto p = bl.cbegin(); + + DECODE_START(1, p); + decode(buf, p); + DECODE_FINISH(p); + + ssize_t len = buf.length(); + + res = len; // refer to man getxattr(2) for output buffer size == 0 + + if (size > 0) { + if (len > size) { + res = -CEPHFS_ERANGE; // insufficient output buffer space + } else { + memcpy(value, buf.c_str(), len); + } + } + return res; +} + +int Client::_do_setattr(Inode *in, struct ceph_statx *stx, int mask, + const UserPerm& perms, InodeRef *inp, + std::vector<uint8_t>* aux) +{ + int issued = in->caps_issued(); + union ceph_mds_request_args args; + bool kill_sguid = false; + int inode_drop = 0; + size_t auxsize = 0; + + if (aux) + auxsize = aux->size(); + + ldout(cct, 10) << __func__ << " mask " << mask << " issued " << + ccap_string(issued) << " aux size " << auxsize << dendl; + + if (in->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + if ((mask & CEPH_SETATTR_SIZE) && + (uint64_t)stx->stx_size > in->size && + is_quota_bytes_exceeded(in, (uint64_t)stx->stx_size - in->size, + perms)) { + return -CEPHFS_EDQUOT; + } + + // Can't set fscrypt_auth and file at the same time! + if ((mask & (CEPH_SETATTR_FSCRYPT_AUTH|CEPH_SETATTR_FSCRYPT_FILE)) == + (CEPH_SETATTR_FSCRYPT_AUTH|CEPH_SETATTR_FSCRYPT_FILE)) + return -CEPHFS_EINVAL; + + if (!aux && (mask & (CEPH_SETATTR_FSCRYPT_AUTH|CEPH_SETATTR_FSCRYPT_FILE))) + return -CEPHFS_EINVAL; + + memset(&args, 0, sizeof(args)); + + // make the change locally? + if ((in->cap_dirtier_uid >= 0 && perms.uid() != in->cap_dirtier_uid) || + (in->cap_dirtier_gid >= 0 && perms.gid() != in->cap_dirtier_gid)) { + ldout(cct, 10) << __func__ << " caller " << perms.uid() << ":" << perms.gid() + << " != cap dirtier " << in->cap_dirtier_uid << ":" + << in->cap_dirtier_gid << ", forcing sync setattr" + << dendl; + /* + * This works because we implicitly flush the caps as part of the + * request, so the cap update check will happen with the writeback + * cap context, and then the setattr check will happen with the + * caller's context. + * + * In reality this pattern is likely pretty rare (different users + * setattr'ing the same file). If that turns out not to be the + * case later, we can build a more complex pipelined cap writeback + * infrastructure... + */ + mask |= CEPH_SETATTR_CTIME; + } + + if (!mask) { + // caller just needs us to bump the ctime + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + if (issued & CEPH_CAP_AUTH_EXCL) + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + else if (issued & CEPH_CAP_FILE_EXCL) + in->mark_caps_dirty(CEPH_CAP_FILE_EXCL); + else if (issued & CEPH_CAP_XATTR_EXCL) + in->mark_caps_dirty(CEPH_CAP_XATTR_EXCL); + else + mask |= CEPH_SETATTR_CTIME; + } + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + kill_sguid = !!(mask & CEPH_SETATTR_KILL_SGUID); + } + + if (mask & CEPH_SETATTR_UID) { + ldout(cct,10) << "changing uid to " << stx->stx_uid << dendl; + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->uid = stx->stx_uid; + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + mask &= ~CEPH_SETATTR_UID; + kill_sguid = true; + } else if (!in->caps_issued_mask(CEPH_CAP_AUTH_SHARED) || + in->uid != stx->stx_uid) { + args.setattr.uid = stx->stx_uid; + inode_drop |= CEPH_CAP_AUTH_SHARED; + } else { + mask &= ~CEPH_SETATTR_UID; + } + } + + if (mask & CEPH_SETATTR_GID) { + ldout(cct,10) << "changing gid to " << stx->stx_gid << dendl; + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->gid = stx->stx_gid; + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + mask &= ~CEPH_SETATTR_GID; + kill_sguid = true; + } else if (!in->caps_issued_mask(CEPH_CAP_AUTH_SHARED) || + in->gid != stx->stx_gid) { + args.setattr.gid = stx->stx_gid; + inode_drop |= CEPH_CAP_AUTH_SHARED; + } else { + mask &= ~CEPH_SETATTR_GID; + } + } + + if (mask & CEPH_SETATTR_MODE) { + ldout(cct,10) << "changing mode to " << stx->stx_mode << dendl; + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->mode = (in->mode & ~07777) | (stx->stx_mode & 07777); + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + mask &= ~CEPH_SETATTR_MODE; + } else if (!in->caps_issued_mask(CEPH_CAP_AUTH_SHARED) || + in->mode != stx->stx_mode) { + args.setattr.mode = stx->stx_mode; + inode_drop |= CEPH_CAP_AUTH_SHARED; + } else { + mask &= ~CEPH_SETATTR_MODE; + } + } else if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL) && S_ISREG(in->mode)) { + if (kill_sguid && (in->mode & (S_IXUSR|S_IXGRP|S_IXOTH))) { + in->mode &= ~(S_ISUID|S_ISGID); + } else { + if (mask & CEPH_SETATTR_KILL_SUID) { + in->mode &= ~S_ISUID; + } + if (mask & CEPH_SETATTR_KILL_SGID) { + in->mode &= ~S_ISGID; + } + } + mask &= ~(CEPH_SETATTR_KILL_SGUID|CEPH_SETATTR_KILL_SUID|CEPH_SETATTR_KILL_SGID); + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + } + + if (mask & CEPH_SETATTR_BTIME) { + ldout(cct,10) << "changing btime to " << in->btime << dendl; + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->btime = utime_t(stx->stx_btime); + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + mask &= ~CEPH_SETATTR_BTIME; + } else if (!in->caps_issued_mask(CEPH_CAP_AUTH_SHARED) || + in->btime != utime_t(stx->stx_btime)) { + args.setattr.btime = utime_t(stx->stx_btime); + inode_drop |= CEPH_CAP_AUTH_SHARED; + } else { + mask &= ~CEPH_SETATTR_BTIME; + } + } + + if (mask & CEPH_SETATTR_FSCRYPT_AUTH) { + ldout(cct,10) << "resetting cached fscrypt_auth field. size now " + << in->fscrypt_auth.size() << dendl; + + if (in->caps_issued_mask(CEPH_CAP_AUTH_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->fscrypt_auth = *aux; + in->mark_caps_dirty(CEPH_CAP_AUTH_EXCL); + mask &= ~CEPH_SETATTR_FSCRYPT_AUTH; + } else if (!in->caps_issued_mask(CEPH_CAP_AUTH_SHARED) || + in->fscrypt_auth != *aux) { + inode_drop |= CEPH_CAP_AUTH_SHARED; + } else { + mask &= ~CEPH_SETATTR_FSCRYPT_AUTH; + } + } + + if (mask & CEPH_SETATTR_SIZE) { + if ((uint64_t)stx->stx_size >= mdsmap->get_max_filesize()) { + //too big! + ldout(cct,10) << "unable to set size to " << stx->stx_size << ". Too large!" << dendl; + return -CEPHFS_EFBIG; + } + + ldout(cct,10) << "changing size to " << stx->stx_size << dendl; + if (in->caps_issued_mask(CEPH_CAP_FILE_EXCL) && + !(mask & CEPH_SETATTR_KILL_SGUID) && + stx->stx_size >= in->size) { + if (stx->stx_size > in->size) { + in->size = in->reported_size = stx->stx_size; + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->mark_caps_dirty(CEPH_CAP_FILE_EXCL); + mask &= ~(CEPH_SETATTR_SIZE); + mask |= CEPH_SETATTR_MTIME; + } else { + // ignore it when size doesn't change + mask &= ~(CEPH_SETATTR_SIZE); + } + } else { + args.setattr.size = stx->stx_size; + inode_drop |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | + CEPH_CAP_FILE_WR; + } + } + + if (mask & CEPH_SETATTR_FSCRYPT_FILE) { + ldout(cct,10) << "resetting cached fscrypt_file field. size now " + << in->fscrypt_file.size() << dendl; + + if (in->caps_issued_mask(CEPH_CAP_FILE_EXCL)) { + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->fscrypt_file = *aux; + in->mark_caps_dirty(CEPH_CAP_FILE_EXCL); + mask &= ~CEPH_SETATTR_FSCRYPT_FILE; + } else if (!in->caps_issued_mask(CEPH_CAP_FILE_SHARED) || + in->fscrypt_file != *aux) { + inode_drop |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; + } else { + mask &= ~CEPH_SETATTR_FSCRYPT_FILE; + } + } + + if (mask & CEPH_SETATTR_MTIME) { + if (in->caps_issued_mask(CEPH_CAP_FILE_EXCL)) { + in->mtime = utime_t(stx->stx_mtime); + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->time_warp_seq++; + in->mark_caps_dirty(CEPH_CAP_FILE_EXCL); + mask &= ~CEPH_SETATTR_MTIME; + } else if (in->caps_issued_mask(CEPH_CAP_FILE_WR) && + utime_t(stx->stx_mtime) > in->mtime) { + in->mtime = utime_t(stx->stx_mtime); + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + mask &= ~CEPH_SETATTR_MTIME; + } else if (!in->caps_issued_mask(CEPH_CAP_FILE_SHARED) || + in->mtime != utime_t(stx->stx_mtime)) { + args.setattr.mtime = utime_t(stx->stx_mtime); + inode_drop |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | + CEPH_CAP_FILE_WR; + } else { + mask &= ~CEPH_SETATTR_MTIME; + } + } + + if (mask & CEPH_SETATTR_ATIME) { + if (in->caps_issued_mask(CEPH_CAP_FILE_EXCL)) { + in->atime = utime_t(stx->stx_atime); + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->time_warp_seq++; + in->mark_caps_dirty(CEPH_CAP_FILE_EXCL); + mask &= ~CEPH_SETATTR_ATIME; + } else if (in->caps_issued_mask(CEPH_CAP_FILE_WR) && + utime_t(stx->stx_atime) > in->atime) { + in->atime = utime_t(stx->stx_atime); + in->ctime = ceph_clock_now(); + in->cap_dirtier_uid = perms.uid(); + in->cap_dirtier_gid = perms.gid(); + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + mask &= ~CEPH_SETATTR_ATIME; + } else if (!in->caps_issued_mask(CEPH_CAP_FILE_SHARED) || + in->atime != utime_t(stx->stx_atime)) { + args.setattr.atime = utime_t(stx->stx_atime); + inode_drop |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | + CEPH_CAP_FILE_WR; + } else { + mask &= ~CEPH_SETATTR_ATIME; + } + } + + if (!mask) { + in->change_attr++; + if (in->is_dir() && in->snapid == CEPH_NOSNAP) { + vinodeno_t vino(in->ino, CEPH_SNAPDIR); + if (inode_map.count(vino)) { + refresh_snapdir_attrs(inode_map[vino], in); + } + } + return 0; + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_SETATTR); + + filepath path; + + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(in); + + req->head.args = args; + req->inode_drop = inode_drop; + if (mask & CEPH_SETATTR_FSCRYPT_AUTH) { + req->fscrypt_auth = *aux; + } else if (mask & CEPH_SETATTR_FSCRYPT_FILE) { + req->fscrypt_file = *aux; + } + req->head.args.setattr.mask = mask; + req->regetattr_mask = mask; + + int res = make_request(req, perms, inp); + ldout(cct, 10) << "_setattr result=" << res << dendl; + return res; +} + +/* Note that we only care about attrs that setattr cares about */ +void Client::stat_to_statx(struct stat *st, struct ceph_statx *stx) +{ + stx->stx_size = st->st_size; + stx->stx_mode = st->st_mode; + stx->stx_uid = st->st_uid; + stx->stx_gid = st->st_gid; +#ifdef __APPLE__ + stx->stx_mtime = st->st_mtimespec; + stx->stx_atime = st->st_atimespec; +#elif __WIN32 + stx->stx_mtime.tv_sec = st->st_mtime; + stx->stx_mtime.tv_nsec = 0; + stx->stx_atime.tv_sec = st->st_atime; + stx->stx_atime.tv_nsec = 0; +#else + stx->stx_mtime = st->st_mtim; + stx->stx_atime = st->st_atim; +#endif +} + +int Client::__setattrx(Inode *in, struct ceph_statx *stx, int mask, + const UserPerm& perms, InodeRef *inp) +{ + if (mask & CEPH_SETATTR_SIZE) { + mask |= clear_suid_sgid(in, perms, true); + } + + int ret = _do_setattr(in, stx, mask, perms, inp); + if (ret < 0) + return ret; + if (mask & CEPH_SETATTR_MODE) + ret = _posix_acl_chmod(in, stx->stx_mode, perms); + return ret; +} + +int Client::_setattrx(InodeRef &in, struct ceph_statx *stx, int mask, + const UserPerm& perms) +{ + mask &= (CEPH_SETATTR_MODE | CEPH_SETATTR_UID | + CEPH_SETATTR_GID | CEPH_SETATTR_MTIME | + CEPH_SETATTR_ATIME | CEPH_SETATTR_SIZE | + CEPH_SETATTR_CTIME | CEPH_SETATTR_BTIME); + if (cct->_conf->client_permissions) { + int r = may_setattr(in.get(), stx, mask, perms); + if (r < 0) + return r; + } + return __setattrx(in.get(), stx, mask, perms); +} + +int Client::_setattr(InodeRef &in, struct stat *attr, int mask, + const UserPerm& perms) +{ + struct ceph_statx stx; + + stat_to_statx(attr, &stx); + mask &= ~CEPH_SETATTR_BTIME; + + if ((mask & CEPH_SETATTR_UID) && attr->st_uid == static_cast<uid_t>(-1)) { + mask &= ~CEPH_SETATTR_UID; + } + if ((mask & CEPH_SETATTR_GID) && attr->st_gid == static_cast<uid_t>(-1)) { + mask &= ~CEPH_SETATTR_GID; + } + + return _setattrx(in, &stx, mask, perms); +} + +int Client::setattr(const char *relpath, struct stat *attr, int mask, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mask << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms); + if (r < 0) + return r; + return _setattr(in, attr, mask, perms); +} + +int Client::setattrx(const char *relpath, struct ceph_statx *stx, int mask, + const UserPerm& perms, int flags) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mask << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW)); + if (r < 0) + return r; + return _setattrx(in, stx, mask, perms); +} + +int Client::fsetattr(int fd, struct stat *attr, int mask, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << mask << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + return _setattr(f->inode, attr, mask, perms); +} + +int Client::fsetattrx(int fd, struct ceph_statx *stx, int mask, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << mask << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + return _setattrx(f->inode, stx, mask, perms); +} + +int Client::stat(const char *relpath, struct stat *stbuf, const UserPerm& perms, + frag_info_t *dirstat, int mask) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " enter (relpath " << relpath << " mask " << mask << ")" << dendl; + tout(cct) << "stat" << std::endl; + tout(cct) << relpath << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms, true, mask); + if (r < 0) + return r; + r = _getattr(in, mask, perms); + if (r < 0) { + ldout(cct, 3) << __func__ << " exit on error!" << dendl; + return r; + } + fill_stat(in, stbuf, dirstat); + ldout(cct, 3) << __func__ << " exit (relpath " << relpath << " mask " << mask << ")" << dendl; + return r; +} + +unsigned Client::statx_to_mask(unsigned int flags, unsigned int want) +{ + unsigned mask = 0; + + /* The AT_STATX_FORCE_SYNC is always in higher priority than AT_STATX_DONT_SYNC. */ + if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_DONT_SYNC) + goto out; + + /* Always set PIN to distinguish from AT_STATX_DONT_SYNC case */ + mask |= CEPH_CAP_PIN; + if (want & (CEPH_STATX_MODE|CEPH_STATX_UID|CEPH_STATX_GID|CEPH_STATX_BTIME|CEPH_STATX_CTIME|CEPH_STATX_VERSION)) + mask |= CEPH_CAP_AUTH_SHARED; + if (want & (CEPH_STATX_NLINK|CEPH_STATX_CTIME|CEPH_STATX_VERSION)) + mask |= CEPH_CAP_LINK_SHARED; + if (want & (CEPH_STATX_NLINK|CEPH_STATX_ATIME|CEPH_STATX_MTIME|CEPH_STATX_CTIME|CEPH_STATX_SIZE|CEPH_STATX_BLOCKS|CEPH_STATX_VERSION)) + mask |= CEPH_CAP_FILE_SHARED; + if (want & (CEPH_STATX_VERSION|CEPH_STATX_CTIME)) + mask |= CEPH_CAP_XATTR_SHARED; +out: + return mask; +} + +int Client::statx(const char *relpath, struct ceph_statx *stx, + const UserPerm& perms, + unsigned int want, unsigned int flags) +{ + return statxat(CEPHFS_AT_FDCWD, relpath, stx, perms, want, flags); +} + +int Client::lstat(const char *relpath, struct stat *stbuf, + const UserPerm& perms, frag_info_t *dirstat, int mask) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " enter (relpath " << relpath << " mask " << mask << ")" << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + // don't follow symlinks + int r = path_walk(path, &in, perms, false, mask); + if (r < 0) + return r; + r = _getattr(in, mask, perms); + if (r < 0) { + ldout(cct, 3) << __func__ << " exit on error!" << dendl; + return r; + } + fill_stat(in, stbuf, dirstat); + ldout(cct, 3) << __func__ << " exit (relpath " << relpath << " mask " << mask << ")" << dendl; + return r; +} + +int Client::fill_stat(Inode *in, struct stat *st, frag_info_t *dirstat, nest_info_t *rstat) +{ + ldout(cct, 10) << __func__ << " on " << in->ino << " snap/dev" << in->snapid + << " mode 0" << oct << in->mode << dec + << " mtime " << in->mtime << " ctime " << in->ctime << dendl; + memset(st, 0, sizeof(struct stat)); + if (use_faked_inos()) + st->st_ino = in->faked_ino; + else + st->st_ino = in->ino; + st->st_dev = in->snapid; + st->st_mode = in->mode; + st->st_rdev = in->rdev; + if (in->is_dir()) { + switch (in->nlink) { + case 0: + st->st_nlink = 0; /* dir is unlinked */ + break; + case 1: + st->st_nlink = 1 /* parent dentry */ + + 1 /* <dir>/. */ + + in->dirstat.nsubdirs; /* include <dir>/. self-reference */ + break; + default: + ceph_abort(); + } + } else { + st->st_nlink = in->nlink; + } + st->st_uid = in->uid; + st->st_gid = in->gid; + if (in->ctime > in->mtime) { + stat_set_ctime_sec(st, in->ctime.sec()); + stat_set_ctime_nsec(st, in->ctime.nsec()); + } else { + stat_set_ctime_sec(st, in->mtime.sec()); + stat_set_ctime_nsec(st, in->mtime.nsec()); + } + stat_set_atime_sec(st, in->atime.sec()); + stat_set_atime_nsec(st, in->atime.nsec()); + stat_set_mtime_sec(st, in->mtime.sec()); + stat_set_mtime_nsec(st, in->mtime.nsec()); + if (in->is_dir()) { + if (cct->_conf->client_dirsize_rbytes) { + st->st_size = in->rstat.rbytes; + } else if (in->snapid == CEPH_SNAPDIR) { + SnapRealm *realm = get_snap_realm_maybe(in->vino().ino); + if (realm) { + st->st_size = realm->my_snaps.size(); + put_snap_realm(realm); + } + } else { + st->st_size = in->dirstat.size(); + } +// The Windows "stat" structure provides just a subset of the fields that are +// available on Linux. +#ifndef _WIN32 + st->st_blocks = 1; +#endif + } else { + st->st_size = in->size; +#ifndef _WIN32 + st->st_blocks = (in->size + 511) >> 9; +#endif + } +#ifndef _WIN32 + st->st_blksize = std::max<uint32_t>(in->layout.stripe_unit, 4096); +#endif + + if (dirstat) + *dirstat = in->dirstat; + if (rstat) + *rstat = in->rstat; + + return in->caps_issued(); +} + +void Client::fill_statx(Inode *in, unsigned int mask, struct ceph_statx *stx) +{ + ldout(cct, 10) << __func__ << " on " << in->ino << " snap/dev" << in->snapid + << " mode 0" << oct << in->mode << dec + << " mtime " << in->mtime << " ctime " << in->ctime << " change_attr " << in->change_attr << dendl; + memset(stx, 0, sizeof(struct ceph_statx)); + + /* + * If mask is 0, then the caller set AT_STATX_DONT_SYNC. Reset the mask + * so that all bits are set. + */ + if (!mask) + mask = ~0; + + /* These are always considered to be available */ + stx->stx_dev = in->snapid; + stx->stx_blksize = std::max<uint32_t>(in->layout.stripe_unit, 4096); + + /* Type bits are always set, even when CEPH_STATX_MODE is not */ + stx->stx_mode = S_IFMT & in->mode; + stx->stx_ino = use_faked_inos() ? in->faked_ino : (uint64_t)in->ino; + stx->stx_rdev = in->rdev; + stx->stx_mask |= (CEPH_STATX_INO|CEPH_STATX_RDEV); + + if (mask & CEPH_CAP_AUTH_SHARED) { + stx->stx_uid = in->uid; + stx->stx_gid = in->gid; + stx->stx_mode = in->mode; + in->btime.to_timespec(&stx->stx_btime); + stx->stx_mask |= (CEPH_STATX_MODE|CEPH_STATX_UID|CEPH_STATX_GID|CEPH_STATX_BTIME); + } + + if (mask & CEPH_CAP_LINK_SHARED) { + if (in->is_dir()) { + switch (in->nlink) { + case 0: + stx->stx_nlink = 0; /* dir is unlinked */ + break; + case 1: + stx->stx_nlink = 1 /* parent dentry */ + + 1 /* <dir>/. */ + + in->dirstat.nsubdirs; /* include <dir>/. self-reference */ + break; + default: + ceph_abort(); + } + } else { + stx->stx_nlink = in->nlink; + } + stx->stx_mask |= CEPH_STATX_NLINK; + } + + if (mask & CEPH_CAP_FILE_SHARED) { + + in->atime.to_timespec(&stx->stx_atime); + in->mtime.to_timespec(&stx->stx_mtime); + + if (in->is_dir()) { + if (cct->_conf->client_dirsize_rbytes) { + stx->stx_size = in->rstat.rbytes; + } else if (in->snapid == CEPH_SNAPDIR) { + SnapRealm *realm = get_snap_realm_maybe(in->vino().ino); + if (realm) { + stx->stx_size = realm->my_snaps.size(); + put_snap_realm(realm); + } + } else { + stx->stx_size = in->dirstat.size(); + } + stx->stx_blocks = 1; + } else { + stx->stx_size = in->size; + stx->stx_blocks = (in->size + 511) >> 9; + } + stx->stx_mask |= (CEPH_STATX_ATIME|CEPH_STATX_MTIME| + CEPH_STATX_SIZE|CEPH_STATX_BLOCKS); + } + + /* Change time and change_attr both require all shared caps to view */ + if ((mask & CEPH_STAT_CAP_INODE_ALL) == CEPH_STAT_CAP_INODE_ALL) { + stx->stx_version = in->change_attr; + if (in->ctime > in->mtime) + in->ctime.to_timespec(&stx->stx_ctime); + else + in->mtime.to_timespec(&stx->stx_ctime); + stx->stx_mask |= (CEPH_STATX_CTIME|CEPH_STATX_VERSION); + } + +} + +void Client::touch_dn(Dentry *dn) +{ + lru.lru_touch(dn); +} + +int Client::chmod(const char *relpath, mode_t mode, const UserPerm& perms) +{ + return chmodat(CEPHFS_AT_FDCWD, relpath, mode, 0, perms); +} + +int Client::fchmod(int fd, mode_t mode, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << mode << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + struct stat attr; + attr.st_mode = mode; + return _setattr(f->inode, &attr, CEPH_SETATTR_MODE, perms); +} + +int Client::chmodat(int dirfd, const char *relpath, mode_t mode, int flags, + const UserPerm& perms) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << mode << std::endl; + tout(cct) << flags << std::endl; + + filepath path(relpath); + InodeRef in; + InodeRef dirinode; + + std::scoped_lock lock(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + r = path_walk(path, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW), 0, dirinode); + if (r < 0) { + return r; + } + struct stat attr; + attr.st_mode = mode; + return _setattr(in, &attr, CEPH_SETATTR_MODE, perms); +} + +int Client::lchmod(const char *relpath, mode_t mode, const UserPerm& perms) +{ + return chmodat(CEPHFS_AT_FDCWD, relpath, mode, AT_SYMLINK_NOFOLLOW, perms); +} + +int Client::chown(const char *relpath, uid_t new_uid, gid_t new_gid, + const UserPerm& perms) +{ + return chownat(CEPHFS_AT_FDCWD, relpath, new_uid, new_gid, 0, perms); +} + +int Client::fchown(int fd, uid_t new_uid, gid_t new_gid, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << new_uid << std::endl; + tout(cct) << new_gid << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + struct stat attr; + attr.st_uid = new_uid; + attr.st_gid = new_gid; + int mask = 0; + if (new_uid != static_cast<uid_t>(-1)) mask |= CEPH_SETATTR_UID; + if (new_gid != static_cast<gid_t>(-1)) mask |= CEPH_SETATTR_GID; + return _setattr(f->inode, &attr, mask, perms); +} + +int Client::lchown(const char *relpath, uid_t new_uid, gid_t new_gid, + const UserPerm& perms) +{ + return chownat(CEPHFS_AT_FDCWD, relpath, new_uid, new_gid, AT_SYMLINK_NOFOLLOW, perms); +} + +int Client::chownat(int dirfd, const char *relpath, uid_t new_uid, gid_t new_gid, + int flags, const UserPerm& perms) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << new_uid << std::endl; + tout(cct) << new_gid << std::endl; + tout(cct) << flags << std::endl; + + filepath path(relpath); + InodeRef in; + InodeRef dirinode; + + std::scoped_lock lock(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + r = path_walk(path, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW), 0, dirinode); + if (r < 0) { + return r; + } + struct stat attr; + attr.st_uid = new_uid; + attr.st_gid = new_gid; + return _setattr(in, &attr, CEPH_SETATTR_UID|CEPH_SETATTR_GID, perms); +} + +static void attr_set_atime_and_mtime(struct stat *attr, + const utime_t &atime, + const utime_t &mtime) +{ + stat_set_atime_sec(attr, atime.tv.tv_sec); + stat_set_atime_nsec(attr, atime.tv.tv_nsec); + stat_set_mtime_sec(attr, mtime.tv.tv_sec); + stat_set_mtime_nsec(attr, mtime.tv.tv_nsec); +} + +// for [l]utime() invoke the timeval variant as the timespec +// variant are not yet implemented. for futime[s](), invoke +// the timespec variant. +int Client::utime(const char *relpath, struct utimbuf *buf, + const UserPerm& perms) +{ + struct timeval tv[2]; + tv[0].tv_sec = buf->actime; + tv[0].tv_usec = 0; + tv[1].tv_sec = buf->modtime; + tv[1].tv_usec = 0; + + return utimes(relpath, tv, perms); +} + +int Client::lutime(const char *relpath, struct utimbuf *buf, + const UserPerm& perms) +{ + struct timeval tv[2]; + tv[0].tv_sec = buf->actime; + tv[0].tv_usec = 0; + tv[1].tv_sec = buf->modtime; + tv[1].tv_usec = 0; + + return lutimes(relpath, tv, perms); +} + +int Client::futime(int fd, struct utimbuf *buf, const UserPerm& perms) +{ + struct timespec ts[2]; + ts[0].tv_sec = buf->actime; + ts[0].tv_nsec = 0; + ts[1].tv_sec = buf->modtime; + ts[1].tv_nsec = 0; + + return futimens(fd, ts, perms); +} + +int Client::utimes(const char *relpath, struct timeval times[2], + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << "atime: " << times[0].tv_sec << "." << times[0].tv_usec + << std::endl; + tout(cct) << "mtime: " << times[1].tv_sec << "." << times[1].tv_usec + << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms); + if (r < 0) + return r; + struct ceph_statx attr; + utime_t(times[0]).to_timespec(&attr.stx_atime); + utime_t(times[1]).to_timespec(&attr.stx_mtime); + + return _setattrx(in, &attr, CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME, perms); +} + +int Client::lutimes(const char *relpath, struct timeval times[2], + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << "atime: " << times[0].tv_sec << "." << times[0].tv_usec + << std::endl; + tout(cct) << "mtime: " << times[1].tv_sec << "." << times[1].tv_usec + << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms, false); + if (r < 0) + return r; + struct ceph_statx attr; + utime_t(times[0]).to_timespec(&attr.stx_atime); + utime_t(times[1]).to_timespec(&attr.stx_mtime); + + return _setattrx(in, &attr, CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME, perms); +} + +int Client::futimes(int fd, struct timeval times[2], const UserPerm& perms) +{ + struct timespec ts[2]; + ts[0].tv_sec = times[0].tv_sec; + ts[0].tv_nsec = times[0].tv_usec * 1000; + ts[1].tv_sec = times[1].tv_sec; + ts[1].tv_nsec = times[1].tv_usec * 1000; + + return futimens(fd, ts, perms); +} + +int Client::futimens(int fd, struct timespec times[2], const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << "atime: " << times[0].tv_sec << "." << times[0].tv_nsec + << std::endl; + tout(cct) << "mtime: " << times[1].tv_sec << "." << times[1].tv_nsec + << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + struct ceph_statx attr; + utime_t(times[0]).to_timespec(&attr.stx_atime); + utime_t(times[1]).to_timespec(&attr.stx_mtime); + + return _setattrx(f->inode, &attr, CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME, perms); +} + +int Client::utimensat(int dirfd, const char *relpath, struct timespec times[2], int flags, + const UserPerm& perms) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << "atime: " << times[0].tv_sec << "." << times[0].tv_nsec + << std::endl; + tout(cct) << "mtime: " << times[1].tv_sec << "." << times[1].tv_nsec + << std::endl; + tout(cct) << flags << std::endl; + + filepath path(relpath); + InodeRef in; + InodeRef dirinode; + + std::scoped_lock lock(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + +#if defined(__linux__) && defined(O_PATH) + if (flags & O_PATH) { + return -CEPHFS_EBADF; + } +#endif + + r = path_walk(path, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW), 0, dirinode); + if (r < 0) { + return r; + } + struct ceph_statx attr; + utime_t(times[0]).to_timespec(&attr.stx_atime); + utime_t(times[1]).to_timespec(&attr.stx_mtime); + + return _setattrx(in, &attr, CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME, perms); +} + +int Client::flock(int fd, int operation, uint64_t owner) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << operation << std::endl; + tout(cct) << owner << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + + return _flock(f, operation, owner); +} + +int Client::opendir(const char *relpath, dir_result_t **dirpp, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << relpath << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms, true); + if (r < 0) + return r; + if (cct->_conf->client_permissions) { + int r = may_open(in.get(), O_RDONLY, perms); + if (r < 0) + return r; + } + r = _opendir(in.get(), dirpp, perms); + /* if ENOTDIR, dirpp will be an uninitialized point and it's very dangerous to access its value */ + if (r != -CEPHFS_ENOTDIR) + tout(cct) << (uintptr_t)*dirpp << std::endl; + return r; +} + +int Client::fdopendir(int dirfd, dir_result_t **dirpp, const UserPerm &perms) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << std::endl; + tout(cct) << dirfd << std::endl; + + InodeRef dirinode; + std::scoped_lock locker(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + if (cct->_conf->client_permissions) { + r = may_open(dirinode.get(), O_RDONLY, perms); + if (r < 0) { + return r; + } + } + r = _opendir(dirinode.get(), dirpp, perms); + /* if ENOTDIR, dirpp will be an uninitialized point and it's very dangerous to access its value */ + if (r != -CEPHFS_ENOTDIR) { + tout(cct) << (uintptr_t)*dirpp << std::endl; + } + return r; +} + +int Client::_opendir(Inode *in, dir_result_t **dirpp, const UserPerm& perms) +{ + if (!in->is_dir()) + return -CEPHFS_ENOTDIR; + *dirpp = new dir_result_t(in, perms); + opened_dirs.insert(*dirpp); + ldout(cct, 8) << __func__ << "(" << in->ino << ") = " << 0 << " (" << *dirpp << ")" << dendl; + return 0; +} + + +int Client::closedir(dir_result_t *dir) +{ + tout(cct) << __func__ << std::endl; + tout(cct) << (uintptr_t)dir << std::endl; + + ldout(cct, 3) << __func__ << "(" << dir << ") = 0" << dendl; + std::scoped_lock lock(client_lock); + _closedir(dir); + return 0; +} + +void Client::_closedir(dir_result_t *dirp) +{ + ldout(cct, 10) << __func__ << "(" << dirp << ")" << dendl; + + if (dirp->inode) { + ldout(cct, 10) << __func__ << " detaching inode " << dirp->inode << dendl; + dirp->inode.reset(); + } + _readdir_drop_dirp_buffer(dirp); + opened_dirs.erase(dirp); + delete dirp; +} + +void Client::rewinddir(dir_result_t *dirp) +{ + ldout(cct, 3) << __func__ << "(" << dirp << ")" << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + std::scoped_lock lock(client_lock); + dir_result_t *d = static_cast<dir_result_t*>(dirp); + _readdir_drop_dirp_buffer(d); + d->reset(); +} + +loff_t Client::telldir(dir_result_t *dirp) +{ + dir_result_t *d = static_cast<dir_result_t*>(dirp); + ldout(cct, 3) << __func__ << "(" << dirp << ") = " << d->offset << dendl; + return d->offset; +} + +void Client::seekdir(dir_result_t *dirp, loff_t offset) +{ + ldout(cct, 3) << __func__ << "(" << dirp << ", " << offset << ")" << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + std::scoped_lock lock(client_lock); + + if (offset == dirp->offset) + return; + + if (offset > dirp->offset) + dirp->release_count = 0; // bump if we do a forward seek + else + dirp->ordered_count = 0; // disable filling readdir cache + + if (dirp->hash_order()) { + if (dirp->offset > offset) { + _readdir_drop_dirp_buffer(dirp); + dirp->reset(); + } + } else { + if (offset == 0 || + dirp->buffer_frag != frag_t(dir_result_t::fpos_high(offset)) || + dirp->offset_low() > dir_result_t::fpos_low(offset)) { + _readdir_drop_dirp_buffer(dirp); + dirp->reset(); + } + } + + dirp->offset = offset; +} + + +//struct dirent { +// ino_t d_ino; /* inode number */ +// off_t d_off; /* offset to the next dirent */ +// unsigned short d_reclen; /* length of this record */ +// unsigned char d_type; /* type of file */ +// char d_name[256]; /* filename */ +//}; +void Client::fill_dirent(struct dirent *de, const char *name, int type, uint64_t ino, loff_t next_off) +{ + strncpy(de->d_name, name, 255); + de->d_name[255] = '\0'; +#if !defined(__CYGWIN__) && !(defined(_WIN32)) + de->d_ino = ino; +#if !defined(__APPLE__) && !defined(__FreeBSD__) + de->d_off = next_off; +#endif + de->d_reclen = 1; + de->d_type = IFTODT(type); + ldout(cct, 10) << __func__ << " '" << de->d_name << "' -> " << inodeno_t(de->d_ino) + << " type " << (int)de->d_type << " w/ next_off " << hex << next_off << dec << dendl; +#endif +} + +void Client::_readdir_next_frag(dir_result_t *dirp) +{ + frag_t fg = dirp->buffer_frag; + + if (fg.is_rightmost()) { + ldout(cct, 10) << __func__ << " advance from " << fg << " to END" << dendl; + dirp->set_end(); + return; + } + + // advance + fg = fg.next(); + ldout(cct, 10) << __func__ << " advance from " << dirp->buffer_frag << " to " << fg << dendl; + + if (dirp->hash_order()) { + // keep last_name + int64_t new_offset = dir_result_t::make_fpos(fg.value(), 2, true); + if (dirp->offset < new_offset) // don't decrease offset + dirp->offset = new_offset; + } else { + dirp->last_name.clear(); + dirp->offset = dir_result_t::make_fpos(fg, 2, false); + _readdir_rechoose_frag(dirp); + } +} + +void Client::_readdir_rechoose_frag(dir_result_t *dirp) +{ + ceph_assert(dirp->inode); + + if (dirp->hash_order()) + return; + + frag_t cur = frag_t(dirp->offset_high()); + frag_t fg = dirp->inode->dirfragtree[cur.value()]; + if (fg != cur) { + ldout(cct, 10) << __func__ << " frag " << cur << " maps to " << fg << dendl; + dirp->offset = dir_result_t::make_fpos(fg, 2, false); + dirp->last_name.clear(); + dirp->next_offset = 2; + } +} + +void Client::_readdir_drop_dirp_buffer(dir_result_t *dirp) +{ + ldout(cct, 10) << __func__ << " " << dirp << dendl; + dirp->buffer.clear(); +} + +int Client::_readdir_get_frag(int op, dir_result_t* dirp, + fill_readdir_args_cb_t fill_req_cb) +{ + ceph_assert(dirp); + ceph_assert(dirp->inode); + + // get the current frag. + frag_t fg; + if (dirp->hash_order()) + fg = dirp->inode->dirfragtree[dirp->offset_high()]; + else + fg = frag_t(dirp->offset_high()); + + ldout(cct, 10) << __func__ << " " << dirp << " on " << dirp->inode->ino << " fg " << fg + << " offset " << hex << dirp->offset << dec << dendl; + + InodeRef& diri = dirp->inode; + + MetaRequest *req = new MetaRequest(op); + fill_req_cb(dirp, req, diri, fg); + + bufferlist dirbl; + int res = make_request(req, dirp->perms, NULL, NULL, -1, &dirbl); + + if (res == -CEPHFS_EAGAIN) { + ldout(cct, 10) << __func__ << " got EAGAIN, retrying" << dendl; + _readdir_rechoose_frag(dirp); + return _readdir_get_frag(op, dirp, fill_req_cb); + } + + if (res == 0) { + ldout(cct, 10) << __func__ << " " << dirp << " got frag " << dirp->buffer_frag + << " size " << dirp->buffer.size() << dendl; + } else { + ldout(cct, 10) << __func__ << " got error " << res << ", setting end flag" << dendl; + dirp->set_end(); + } + + return res; +} + +struct dentry_off_lt { + bool operator()(const Dentry* dn, int64_t off) const { + return dir_result_t::fpos_cmp(dn->offset, off) < 0; + } +}; + +int Client::_readdir_cache_cb(dir_result_t *dirp, add_dirent_cb_t cb, void *p, + int caps, bool getref) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + ldout(cct, 10) << __func__ << " " << dirp << " on " << dirp->inode->ino + << " last_name " << dirp->last_name + << " offset " << hex << dirp->offset << dec + << dendl; + Dir *dir = dirp->inode->dir; + + if (!dir) { + ldout(cct, 10) << " dir is empty" << dendl; + dirp->set_end(); + return 0; + } + + vector<Dentry*>::iterator pd = std::lower_bound(dir->readdir_cache.begin(), + dir->readdir_cache.end(), + dirp->offset, dentry_off_lt()); + + string dn_name; + while (true) { + int mask = caps; + if (!dirp->inode->is_complete_and_ordered()) + return -CEPHFS_EAGAIN; + if (pd == dir->readdir_cache.end()) + break; + Dentry *dn = *pd; + if (dn->inode == NULL) { + ldout(cct, 15) << " skipping null '" << dn->name << "'" << dendl; + ++pd; + continue; + } + if (dn->cap_shared_gen != dir->parent_inode->shared_gen) { + ldout(cct, 15) << " skipping mismatch shared gen '" << dn->name << "'" << dendl; + ++pd; + continue; + } + + int idx = pd - dir->readdir_cache.begin(); + if (dn->inode->is_dir()) { + mask |= CEPH_STAT_RSTAT; + } + int r = _getattr(dn->inode, mask, dirp->perms); + if (r < 0) + return r; + + // the content of readdir_cache may change after _getattr(), so pd may be invalid iterator + pd = dir->readdir_cache.begin() + idx; + if (pd >= dir->readdir_cache.end() || *pd != dn) + return -CEPHFS_EAGAIN; + + struct ceph_statx stx; + struct dirent de; + fill_statx(dn->inode, caps, &stx); + + uint64_t next_off = dn->offset + 1; + fill_dirent(&de, dn->name.c_str(), stx.stx_mode, stx.stx_ino, next_off); + ++pd; + if (pd == dir->readdir_cache.end()) + next_off = dir_result_t::END; + + Inode *in = NULL; + if (getref) { + in = dn->inode.get(); + _ll_get(in); + } + + dn_name = dn->name; // fill in name while we have lock + + client_lock.unlock(); + r = cb(p, &de, &stx, next_off, in); // _next_ offset + client_lock.lock(); + ldout(cct, 15) << " de " << de.d_name << " off " << hex << dn->offset << dec + << " = " << r << dendl; + if (r < 0) { + return r; + } + + dirp->offset = next_off; + if (dirp->at_end()) + dirp->next_offset = 2; + else + dirp->next_offset = dirp->offset_low(); + dirp->last_name = dn_name; // we successfully returned this one; update! + dirp->release_count = 0; // last_name no longer match cache index + if (r > 0) + return r; + } + + ldout(cct, 10) << __func__ << " " << dirp << " on " << dirp->inode->ino << " at end" << dendl; + dirp->set_end(); + return 0; +} + +int Client::readdir_r_cb(dir_result_t* d, + add_dirent_cb_t cb, + void* p, + unsigned want, + unsigned flags, + bool getref) +{ + auto fill_readdir_cb = [](dir_result_t* dirp, + MetaRequest* req, + InodeRef& diri, + frag_t fg) { + filepath path; + diri->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(diri.get()); + req->head.args.readdir.frag = fg; + req->head.args.readdir.flags = CEPH_READDIR_REPLY_BITFLAGS; + if (dirp->last_name.length()) { + req->path2.set_path(dirp->last_name); + } else if (dirp->hash_order()) { + req->head.args.readdir.offset_hash = dirp->offset_high(); + } + req->dirp = dirp; + }; + int op = CEPH_MDS_OP_READDIR; + if (d->inode && d->inode->snapid == CEPH_SNAPDIR) + op = CEPH_MDS_OP_LSSNAP; + return _readdir_r_cb(op, + d, + cb, + fill_readdir_cb, + p, + want, + flags, + getref, + false); +} + +// +// NB: this is used for both readdir and readdir_snapdiff results processing +// hence it should be request type agnostic +// +int Client::_readdir_r_cb(int op, + dir_result_t *d, + add_dirent_cb_t cb, + fill_readdir_args_cb_t fill_cb, + void *p, + unsigned want, + unsigned flags, + bool getref, + bool bypass_cache) +{ + int caps = statx_to_mask(flags, want); + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::unique_lock cl(client_lock); + + dir_result_t *dirp = static_cast<dir_result_t*>(d); + + ldout(cct, 10) << __func__ << " " << *dirp->inode << " offset " << hex << dirp->offset + << dec << " at_end=" << dirp->at_end() + << " hash_order=" << dirp->hash_order() << dendl; + + struct dirent de; + struct ceph_statx stx; + memset(&de, 0, sizeof(de)); + memset(&stx, 0, sizeof(stx)); + + InodeRef& diri = dirp->inode; + + if (dirp->at_end()) + return 0; + + if (dirp->offset == 0) { + ldout(cct, 15) << " including ." << dendl; + ceph_assert(diri->dentries.size() < 2); // can't have multiple hard-links to a dir + uint64_t next_off = 1; + + int r; + r = _getattr(diri, caps | CEPH_STAT_RSTAT, dirp->perms); + if (r < 0) + return r; + + fill_statx(diri, caps, &stx); + fill_dirent(&de, ".", S_IFDIR, stx.stx_ino, next_off); + + Inode *inode = NULL; + if (getref) { + inode = diri.get(); + _ll_get(inode); + } + + cl.unlock(); + r = cb(p, &de, &stx, next_off, inode); + cl.lock(); + if (r < 0) + return r; + + dirp->offset = next_off; + if (r > 0) + return r; + } + if (dirp->offset == 1) { + ldout(cct, 15) << " including .." << dendl; + uint64_t next_off = 2; + InodeRef in; + if (diri->dentries.empty()) + in = diri; + else + in = diri->get_first_parent()->dir->parent_inode; + + int r; + r = _getattr(in, caps | CEPH_STAT_RSTAT, dirp->perms); + if (r < 0) + return r; + + fill_statx(in, caps, &stx); + fill_dirent(&de, "..", S_IFDIR, stx.stx_ino, next_off); + + Inode *inode = NULL; + if (getref) { + inode = in.get(); + _ll_get(inode); + } + + cl.unlock(); + r = cb(p, &de, &stx, next_off, inode); + cl.lock(); + if (r < 0) + return r; + + dirp->offset = next_off; + if (r > 0) + return r; + } + + // can we read from our cache? + ldout(cct, 10) << __func__ + << " offset " << hex << dirp->offset << dec + << " snapid " << dirp->inode->snapid << " (complete && ordered) " + << dirp->inode->is_complete_and_ordered() + << " issued " << ccap_string(dirp->inode->caps_issued()) + << dendl; + if (!bypass_cache && + dirp->inode->snapid != CEPH_SNAPDIR && + dirp->inode->is_complete_and_ordered() && + dirp->inode->caps_issued_mask(CEPH_CAP_FILE_SHARED, true)) { + int err = _readdir_cache_cb(dirp, cb, p, caps, getref); + if (err != -CEPHFS_EAGAIN) + return err; + } + + while (1) { + if (dirp->at_end()) + return 0; + + bool check_caps = true; + if (!dirp->is_cached()) { + int r = _readdir_get_frag(op, dirp, fill_cb); + if (r) + return r; + // _readdir_get_frag () may updates dirp->offset if the replied dirfrag is + // different than the requested one. (our dirfragtree was outdated) + check_caps = false; + } + frag_t fg = dirp->buffer_frag; + + ldout(cct, 10) << __func__ + << " frag " << fg << " buffer size " << dirp->buffer.size() + << " offset " << hex << dirp->offset << dendl; + + for (auto it = std::lower_bound(dirp->buffer.begin(), dirp->buffer.end(), + dirp->offset, dir_result_t::dentry_off_lt()); + it != dirp->buffer.end(); + ++it) { + dir_result_t::dentry &entry = *it; + + uint64_t next_off = entry.offset + 1; + + int r; + if (check_caps) { + int mask = caps; + if(entry.inode->is_dir()){ + mask |= CEPH_STAT_RSTAT; + } + r = _getattr(entry.inode, mask, dirp->perms); + if (r < 0) + return r; + } + + fill_statx(entry.inode, caps, &stx); + fill_dirent(&de, entry.name.c_str(), stx.stx_mode, stx.stx_ino, next_off); + + Inode *inode = NULL; + if (getref) { + inode = entry.inode.get(); + _ll_get(inode); + } + + cl.unlock(); + r = cb(p, &de, &stx, next_off, inode); // _next_ offset + cl.lock(); + + ldout(cct, 15) << __func__ + << " de " << de.d_name << " off " << hex << next_off - 1 << dec + << " snap " << entry.inode->snapid + << " = " << r << dendl; + if (r < 0) + return r; + + dirp->offset = next_off; + if (r > 0) + return r; + } + + if (dirp->next_offset > 2) { + ldout(cct, 10) << " fetching next chunk of this frag" << dendl; + _readdir_drop_dirp_buffer(dirp); + continue; // more! + } + + if (!fg.is_rightmost()) { + // next frag! + _readdir_next_frag(dirp); + continue; + } + + if (!bypass_cache && + diri->shared_gen == dirp->start_shared_gen && + diri->dir_release_count == dirp->release_count) { + if (diri->dir_ordered_count == dirp->ordered_count) { + ldout(cct, 10) << " marking (I_COMPLETE|I_DIR_ORDERED) on " << *diri << dendl; + if (diri->dir) { + ceph_assert(diri->dir->readdir_cache.size() >= dirp->cache_index); + diri->dir->readdir_cache.resize(dirp->cache_index); + } + diri->flags |= I_COMPLETE | I_DIR_ORDERED; + } else { + ldout(cct, 10) << " marking I_COMPLETE on " << *diri << dendl; + diri->flags |= I_COMPLETE; + } + } + + dirp->set_end(); + return 0; + } + ceph_abort(); + return 0; +} + + +int Client::readdir_r(dir_result_t *d, struct dirent *de) +{ + return readdirplus_r(d, de, 0, 0, 0, NULL); +} + +/* + * readdirplus_r + * + * returns + * 1 if we got a dirent + * 0 for end of directory + * <0 on error + */ + +struct single_readdir { + struct dirent *de; + struct ceph_statx *stx; + Inode *inode; + bool full; +}; + +static int _readdir_single_dirent_cb(void *p, struct dirent *de, + struct ceph_statx *stx, off_t off, + Inode *in) +{ + single_readdir *c = static_cast<single_readdir *>(p); + + if (c->full) + return -1; // already filled this dirent + + *c->de = *de; + if (c->stx) + *c->stx = *stx; + c->inode = in; + c->full = true; + return 1; +} + +struct dirent *Client::readdir(dir_result_t *d) +{ + int ret; + auto& de = d->de; + single_readdir sr; + sr.de = &de; + sr.stx = NULL; + sr.inode = NULL; + sr.full = false; + + // our callback fills the dirent and sets sr.full=true on first + // call, and returns -1 the second time around. + ret = readdir_r_cb(d, _readdir_single_dirent_cb, (void *)&sr); + if (ret < -1) { + errno = -ret; // this sucks. + return (dirent *) NULL; + } + if (sr.full) { + return &de; + } + return (dirent *) NULL; +} + +int Client::readdirplus_r(dir_result_t *d, struct dirent *de, + struct ceph_statx *stx, unsigned want, + unsigned flags, Inode **out) +{ + single_readdir sr; + sr.de = de; + sr.stx = stx; + sr.inode = NULL; + sr.full = false; + + // our callback fills the dirent and sets sr.full=true on first + // call, and returns -1 the second time around. + int r = readdir_r_cb(d, _readdir_single_dirent_cb, (void *)&sr, want, flags, out); + if (r < -1) + return r; + if (out) + *out = sr.inode; + if (sr.full) + return 1; + return 0; +} + +int Client::readdir_snapdiff(dir_result_t* d1, snapid_t snap2, + struct dirent* out_de, + snapid_t* out_snap) +{ + if (!d1 || !d1->inode || d1->inode->snapid == snap2) { + lderr(cct) << __func__ << " invalid parameters: " + << " d1:" << d1 + << " d1->inode:" << (d1 ? d1->inode : nullptr) + << " snap2 id :" << snap2 + << dendl; + errno = EINVAL; + return -errno; + } + + auto& de = d1->de; + ceph_statx stx; + single_readdir sr; + sr.de = &de; + sr.stx = &stx; + sr.inode = NULL; + sr.full = false; + + auto fill_snapdiff_cb = [&](dir_result_t* dirp, + MetaRequest* req, + InodeRef& diri, + frag_t fg) { + filepath path; + diri->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(diri.get()); + req->head.args.snapdiff.snap_other = snap2; + req->head.args.snapdiff.frag = fg; + req->head.args.snapdiff.flags = CEPH_READDIR_REPLY_BITFLAGS; + if (dirp->last_name.length()) { + req->path2.set_path(dirp->last_name); + } else if (dirp->hash_order()) { + req->head.args.snapdiff.offset_hash = dirp->offset_high(); + } + req->dirp = dirp; + }; + + // our callback fills the dirent and sets sr.full=true on first + // call, and returns -1 the second time around. + int ret = _readdir_r_cb(CEPH_MDS_OP_READDIR_SNAPDIFF, + d1, + _readdir_single_dirent_cb, + fill_snapdiff_cb, + (void*)&sr, + 0, + AT_STATX_DONT_SYNC, + false, + true); + if (ret < -1) { + lderr(cct) << __func__ << " error: " + << cpp_strerror(ret) + << dendl; + errno = -ret; // this sucks. + return ret; + } + + ldout(cct, 15) << __func__ << " " << ret + << " " << sr.de->d_name + << " " << stx.stx_dev + << dendl; + if (sr.full) { + if (out_de) { + *out_de = de; + } + if (out_snap) { + *out_snap = stx.stx_dev; + } + return 1; + } + return 0; +} + +/* getdents */ +struct getdents_result { + char *buf; + int buflen; + int pos; + bool fullent; +}; + +static int _readdir_getdent_cb(void *p, struct dirent *de, + struct ceph_statx *stx, off_t off, Inode *in) +{ + struct getdents_result *c = static_cast<getdents_result *>(p); + + int dlen; + if (c->fullent) + dlen = sizeof(*de); + else + dlen = strlen(de->d_name) + 1; + + if (c->pos + dlen > c->buflen) + return -1; // doesn't fit + + if (c->fullent) { + memcpy(c->buf + c->pos, de, sizeof(*de)); + } else { + memcpy(c->buf + c->pos, de->d_name, dlen); + } + c->pos += dlen; + return 0; +} + +int Client::_getdents(dir_result_t *dir, char *buf, int buflen, bool fullent) +{ + getdents_result gr; + gr.buf = buf; + gr.buflen = buflen; + gr.fullent = fullent; + gr.pos = 0; + + int r = readdir_r_cb(dir, _readdir_getdent_cb, (void *)&gr); + + if (r < 0) { // some error + if (r == -1) { // buffer ran out of space + if (gr.pos) { // but we got some entries already! + return gr.pos; + } // or we need a larger buffer + return -CEPHFS_ERANGE; + } else { // actual error, return it + return r; + } + } + return gr.pos; +} + + +/* getdir */ +struct getdir_result { + list<string> *contents; + int num; +}; + +static int _getdir_cb(void *p, struct dirent *de, struct ceph_statx *stx, off_t off, Inode *in) +{ + getdir_result *r = static_cast<getdir_result *>(p); + + r->contents->push_back(de->d_name); + r->num++; + return 0; +} + +int Client::getdir(const char *relpath, list<string>& contents, + const UserPerm& perms) +{ + ldout(cct, 3) << "getdir(" << relpath << ")" << dendl; + tout(cct) << "getdir" << std::endl; + tout(cct) << relpath << std::endl; + + dir_result_t *d; + int r = opendir(relpath, &d, perms); + if (r < 0) + return r; + + getdir_result gr; + gr.contents = &contents; + gr.num = 0; + r = readdir_r_cb(d, _getdir_cb, (void *)&gr); + + closedir(d); + + if (r < 0) + return r; + return gr.num; +} + + +/****** file i/o **********/ + +// common parts for open and openat. call with client_lock locked. +int Client::create_and_open(int dirfd, const char *relpath, int flags, + const UserPerm& perms, mode_t mode, int stripe_unit, + int stripe_count, int object_size, const char *data_pool, + std::string alternate_name) { + ceph_assert(ceph_mutex_is_locked(client_lock)); + int cflags = ceph_flags_sys2wire(flags); + tout(cct) << cflags << std::endl; + + Fh *fh = NULL; + +#if defined(__linux__) && defined(O_PATH) + /* When the O_PATH is being specified, others flags than O_DIRECTORY + * and O_NOFOLLOW are ignored. Please refer do_entry_open() function + * in kernel (fs/open.c). */ + if (flags & O_PATH) + flags &= O_DIRECTORY | O_NOFOLLOW | O_PATH; +#endif + + filepath path(relpath); + InodeRef in; + bool created = false; + /* O_CREATE with O_EXCL enforces O_NOFOLLOW. */ + bool followsym = !((flags & O_NOFOLLOW) || ((flags & O_CREAT) && (flags & O_EXCL))); + int mask = ceph_caps_for_mode(ceph_flags_to_mode(cflags)); + + InodeRef dirinode = nullptr; + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + r = path_walk(path, &in, perms, followsym, mask, dirinode); + if (r == 0 && (flags & O_CREAT) && (flags & O_EXCL)) + return -CEPHFS_EEXIST; + +#if defined(__linux__) && defined(O_PATH) + if (r == 0 && in->is_symlink() && (flags & O_NOFOLLOW) && !(flags & O_PATH)) +#else + if (r == 0 && in->is_symlink() && (flags & O_NOFOLLOW)) +#endif + return -CEPHFS_ELOOP; + + if (r == -CEPHFS_ENOENT && (flags & O_CREAT)) { + filepath dirpath = path; + string dname = dirpath.last_dentry(); + dirpath.pop_dentry(); + InodeRef dir; + r = path_walk(dirpath, &dir, perms, true, + cct->_conf->client_permissions ? CEPH_CAP_AUTH_SHARED : 0, dirinode); + if (r < 0) { + goto out; + } + if (cct->_conf->client_permissions) { + r = may_create(dir.get(), perms); + if (r < 0) + goto out; + } + r = _create(dir.get(), dname.c_str(), flags, mode, &in, &fh, stripe_unit, + stripe_count, object_size, data_pool, &created, perms, + std::move(alternate_name)); + } + if (r < 0) + goto out; + + if (!created) { + // posix says we can only check permissions of existing files + if (cct->_conf->client_permissions) { + r = may_open(in.get(), flags, perms); + if (r < 0) + goto out; + } + } + + if (!fh) + r = _open(in.get(), flags, mode, &fh, perms); + if (r >= 0) { + // allocate a integer file descriptor + ceph_assert(fh); + r = get_fd(); + ceph_assert(fd_map.count(r) == 0); + fd_map[r] = fh; + } + + out: + return r; +} + +int Client::open(const char *relpath, int flags, const UserPerm& perms, + mode_t mode, int stripe_unit, int stripe_count, + int object_size, const char *data_pool, std::string alternate_name) +{ + return openat(CEPHFS_AT_FDCWD, relpath, flags, perms, mode, stripe_unit, + stripe_count, object_size, data_pool, alternate_name); +} + +int Client::openat(int dirfd, const char *relpath, int flags, const UserPerm& perms, + mode_t mode, int stripe_unit, int stripe_count, int object_size, + const char *data_pool, std::string alternate_name) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + ldout(cct, 3) << "openat enter(" << relpath << ")" << dendl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + tout(cct) << flags << std::endl; + tout(cct) << mode << std::endl; + + std::scoped_lock locker(client_lock); + int r = create_and_open(dirfd, relpath, flags, perms, mode, stripe_unit, stripe_count, + object_size, data_pool, alternate_name); + + tout(cct) << r << std::endl; + ldout(cct, 3) << "openat exit(" << relpath << ")" << dendl; + return r; +} + +int Client::lookup_hash(inodeno_t ino, inodeno_t dirino, const char *name, + const UserPerm& perms) +{ + ldout(cct, 3) << __func__ << " enter(" << ino << ", #" << dirino << "/" << name << ")" << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPHASH); + filepath path(ino); + req->set_filepath(path); + + uint32_t h = ceph_str_hash(CEPH_STR_HASH_RJENKINS, name, strlen(name)); + char f[30]; + sprintf(f, "%u", h); + filepath path2(dirino); + path2.push_dentry(string(f)); + req->set_filepath2(path2); + + int r = make_request(req, perms, NULL, NULL, + rand() % mdsmap->get_num_in_mds()); + ldout(cct, 3) << __func__ << " exit(" << ino << ", #" << dirino << "/" << name << ") = " << r << dendl; + return r; +} + + +/** + * Load inode into local cache. + * + * If inode pointer is non-NULL, and take a reference on + * the resulting Inode object in one operation, so that caller + * can safely assume inode will still be there after return. + */ +int Client::_lookup_vino(vinodeno_t vino, const UserPerm& perms, Inode **inode) +{ + ldout(cct, 8) << __func__ << " enter(" << vino << ")" << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + if (is_reserved_vino(vino)) + return -CEPHFS_ESTALE; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPINO); + filepath path(vino.ino); + req->set_filepath(path); + + /* + * The MDS expects either a "real" snapid here or 0. The special value + * carveouts for the snapid are all at the end of the range so we can + * just look for any snapid below this value. + */ + if (vino.snapid < CEPH_NOSNAP) + req->head.args.lookupino.snapid = vino.snapid; + + int r = make_request(req, perms, NULL, NULL, rand() % mdsmap->get_num_in_mds()); + if (r == 0 && inode != NULL) { + unordered_map<vinodeno_t,Inode*>::iterator p = inode_map.find(vino); + ceph_assert(p != inode_map.end()); + *inode = p->second; + _ll_get(*inode); + } + ldout(cct, 8) << __func__ << " exit(" << vino << ") = " << r << dendl; + return r; +} + +int Client::lookup_ino(inodeno_t ino, const UserPerm& perms, Inode **inode) +{ + vinodeno_t vino(ino, CEPH_NOSNAP); + std::scoped_lock lock(client_lock); + return _lookup_vino(vino, perms, inode); +} + +/** + * Find the parent inode of `ino` and insert it into + * our cache. Conditionally also set `parent` to a referenced + * Inode* if caller provides non-NULL value. + */ +int Client::_lookup_parent(Inode *ino, const UserPerm& perms, Inode **parent) +{ + ldout(cct, 8) << __func__ << " enter(" << ino->ino << ")" << dendl; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPPARENT); + filepath path(ino->ino); + req->set_filepath(path); + + InodeRef target; + int r = make_request(req, perms, &target, NULL, rand() % mdsmap->get_num_in_mds()); + // Give caller a reference to the parent ino if they provided a pointer. + if (parent != NULL) { + if (r == 0) { + *parent = target.get(); + _ll_get(*parent); + ldout(cct, 8) << __func__ << " found parent " << (*parent)->ino << dendl; + } else { + *parent = NULL; + } + } + ldout(cct, 8) << __func__ << " exit(" << ino->ino << ") = " << r << dendl; + return r; +} + +/** + * Populate the parent dentry for `ino`, provided it is + * a child of `parent`. + */ +int Client::_lookup_name(Inode *ino, Inode *parent, const UserPerm& perms) +{ + ceph_assert(parent->is_dir()); + ldout(cct, 3) << __func__ << " enter(" << ino->ino << ")" << dendl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPNAME); + req->set_filepath2(filepath(parent->ino)); + req->set_filepath(filepath(ino->ino)); + req->set_inode(ino); + + int r = make_request(req, perms, NULL, NULL, rand() % mdsmap->get_num_in_mds()); + ldout(cct, 3) << __func__ << " exit(" << ino->ino << ") = " << r << dendl; + return r; +} + +int Client::lookup_name(Inode *ino, Inode *parent, const UserPerm& perms) +{ + std::scoped_lock lock(client_lock); + return _lookup_name(ino, parent, perms); +} + +Fh *Client::_create_fh(Inode *in, int flags, int cmode, const UserPerm& perms) +{ + ceph_assert(in); + Fh *f = new Fh(in, flags, cmode, fd_gen, perms); + + ldout(cct, 10) << __func__ << " " << in->ino << " mode " << cmode << dendl; + + if (in->snapid != CEPH_NOSNAP) { + in->snap_cap_refs++; + ldout(cct, 5) << "open success, fh is " << f << " combined IMMUTABLE SNAP caps " + << ccap_string(in->caps_issued()) << dendl; + } + + const auto& conf = cct->_conf; + f->readahead.set_trigger_requests(1); + f->readahead.set_min_readahead_size(conf->client_readahead_min); + uint64_t max_readahead = Readahead::NO_LIMIT; + if (conf->client_readahead_max_bytes) { + max_readahead = std::min(max_readahead, (uint64_t)conf->client_readahead_max_bytes); + } + if (conf->client_readahead_max_periods) { + max_readahead = std::min(max_readahead, in->layout.get_period()*(uint64_t)conf->client_readahead_max_periods); + } + f->readahead.set_max_readahead_size(max_readahead); + vector<uint64_t> alignments; + alignments.push_back(in->layout.get_period()); + alignments.push_back(in->layout.stripe_unit); + f->readahead.set_alignments(alignments); + + return f; +} + +int Client::_release_fh(Fh *f) +{ + //ldout(cct, 3) << "op: client->close(open_files[ " << fh << " ]);" << dendl; + //ldout(cct, 3) << "op: open_files.erase( " << fh << " );" << dendl; + Inode *in = f->inode.get(); + ldout(cct, 8) << __func__ << " " << f << " mode " << f->mode << " on " << *in << dendl; + + in->unset_deleg(f); + + if (in->snapid == CEPH_NOSNAP) { + if (in->put_open_ref(f->mode)) { + _flush(in, new C_Client_FlushComplete(this, in)); + check_caps(in, 0); + } + } else { + ceph_assert(in->snap_cap_refs > 0); + in->snap_cap_refs--; + } + + _release_filelocks(f); + + // Finally, read any async err (i.e. from flushes) + int err = f->take_async_err(); + if (err != 0) { + ldout(cct, 1) << __func__ << " " << f << " on inode " << *in << " caught async_err = " + << cpp_strerror(err) << dendl; + } else { + ldout(cct, 10) << __func__ << " " << f << " on inode " << *in << " no async_err state" << dendl; + } + + _put_fh(f); + + return err; +} + +void Client::_put_fh(Fh *f) +{ + int left = f->put(); + if (!left) { + delete f; + } +} + +int Client::_open(Inode *in, int flags, mode_t mode, Fh **fhp, + const UserPerm& perms) +{ + if (in->snapid != CEPH_NOSNAP && + (flags & (O_WRONLY | O_RDWR | O_CREAT | O_TRUNC | O_APPEND))) { + return -CEPHFS_EROFS; + } + + // use normalized flags to generate cmode + int cflags = ceph_flags_sys2wire(flags); + if (cct->_conf.get_val<bool>("client_force_lazyio")) + cflags |= CEPH_O_LAZY; + + int cmode = ceph_flags_to_mode(cflags); + int want = ceph_caps_for_mode(cmode); + int result = 0; + + in->get_open_ref(cmode); // make note of pending open, since it effects _wanted_ caps. + + if ((flags & O_TRUNC) == 0 && in->caps_issued_mask(want)) { + // update wanted? + check_caps(in, CHECK_CAPS_NODELAY); + } else { + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_OPEN); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->head.args.open.flags = cflags & ~CEPH_O_CREAT; + req->head.args.open.mode = mode; + req->head.args.open.pool = -1; + if (cct->_conf->client_debug_getattr_caps) + req->head.args.open.mask = DEBUG_GETATTR_CAPS; + else + req->head.args.open.mask = 0; + req->head.args.open.old_size = in->size; // for O_TRUNC + req->set_inode(in); + result = make_request(req, perms); + + /* + * NFS expects that delegations will be broken on a conflicting open, + * not just when there is actual conflicting access to the file. SMB leases + * and oplocks also have similar semantics. + * + * Ensure that clients that have delegations enabled will wait on minimal + * caps during open, just to ensure that other clients holding delegations + * return theirs first. + */ + if (deleg_timeout && result == 0) { + int need = 0, have; + + if (cmode & CEPH_FILE_MODE_WR) + need |= CEPH_CAP_FILE_WR; + if (cmode & CEPH_FILE_MODE_RD) + need |= CEPH_CAP_FILE_RD; + + Fh fh(in, flags, cmode, fd_gen, perms); + result = get_caps(&fh, need, want, &have, -1); + if (result < 0) { + ldout(cct, 8) << "Unable to get caps after open of inode " << *in << + " . Denying open: " << + cpp_strerror(result) << dendl; + } else { + put_cap_ref(in, need); + } + } + } + + // success? + if (result >= 0) { + if (fhp) + *fhp = _create_fh(in, flags, cmode, perms); + } else { + in->put_open_ref(cmode); + } + + trim_cache(); + + return result; +} + +int Client::_renew_caps(Inode *in) +{ + int wanted = in->caps_file_wanted(); + if (in->is_any_caps() && + ((wanted & CEPH_CAP_ANY_WR) == 0 || in->auth_cap)) { + check_caps(in, CHECK_CAPS_NODELAY); + return 0; + } + + int flags = 0; + if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) + flags = O_RDWR; + else if (wanted & CEPH_CAP_FILE_RD) + flags = O_RDONLY; + else if (wanted & CEPH_CAP_FILE_WR) + flags = O_WRONLY; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_OPEN); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->head.args.open.flags = flags; + req->head.args.open.pool = -1; + if (cct->_conf->client_debug_getattr_caps) + req->head.args.open.mask = DEBUG_GETATTR_CAPS; + else + req->head.args.open.mask = 0; + req->set_inode(in); + + // duplicate in case Cap goes away; not sure if that race is a concern? + const UserPerm *pperm = in->get_best_perms(); + UserPerm perms; + if (pperm != NULL) + perms = *pperm; + int ret = make_request(req, perms); + return ret; +} + +int Client::_close(int fd) +{ + ldout(cct, 3) << "close enter(" << fd << ")" << dendl; + tout(cct) << "close" << std::endl; + tout(cct) << fd << std::endl; + + Fh *fh = get_filehandle(fd); + if (!fh) + return -CEPHFS_EBADF; + int err = _release_fh(fh); + fd_map.erase(fd); + put_fd(fd); + ldout(cct, 3) << "close exit(" << fd << ")" << dendl; + return err; +} + +int Client::close(int fd) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + return _close(fd); +} + +// ------------ +// read, write + +loff_t Client::lseek(int fd, loff_t offset, int whence) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "lseek" << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << offset << std::endl; + tout(cct) << whence << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + return _lseek(f, offset, whence); +} + +loff_t Client::_lseek(Fh *f, loff_t offset, int whence) +{ + Inode *in = f->inode.get(); + bool whence_check = false; + loff_t pos = -1; + + switch (whence) { + case SEEK_END: + whence_check = true; + break; + +#ifdef SEEK_DATA + case SEEK_DATA: + whence_check = true; + break; +#endif + +#ifdef SEEK_HOLE + case SEEK_HOLE: + whence_check = true; + break; +#endif + } + + if (whence_check) { + int r = _getattr(in, CEPH_STAT_CAP_SIZE, f->actor_perms); + if (r < 0) + return r; + } + + switch (whence) { + case SEEK_SET: + pos = offset; + break; + + case SEEK_CUR: + pos = f->pos + offset; + break; + + case SEEK_END: + pos = in->size + offset; + break; + +#ifdef SEEK_DATA + case SEEK_DATA: + if (offset < 0 || static_cast<uint64_t>(offset) >= in->size) + return -CEPHFS_ENXIO; + pos = offset; + break; +#endif + +#ifdef SEEK_HOLE + case SEEK_HOLE: + if (offset < 0 || static_cast<uint64_t>(offset) >= in->size) + return -CEPHFS_ENXIO; + pos = in->size; + break; +#endif + + default: + ldout(cct, 1) << __func__ << ": invalid whence value " << whence << dendl; + return -CEPHFS_EINVAL; + } + + if (pos < 0) { + return -CEPHFS_EINVAL; + } else { + f->pos = pos; + } + + ldout(cct, 8) << "_lseek(" << f << ", " << offset << ", " << whence << ") = " << f->pos << dendl; + return f->pos; +} + + +void Client::lock_fh_pos(Fh *f) +{ + ldout(cct, 10) << __func__ << " " << f << dendl; + + if (f->pos_locked || !f->pos_waiters.empty()) { + ceph::condition_variable cond; + f->pos_waiters.push_back(&cond); + ldout(cct, 10) << __func__ << " BLOCKING on " << f << dendl; + std::unique_lock l{client_lock, std::adopt_lock}; + cond.wait(l, [f, me=&cond] { + return !f->pos_locked && f->pos_waiters.front() == me; + }); + l.release(); + ldout(cct, 10) << __func__ << " UNBLOCKING on " << f << dendl; + ceph_assert(f->pos_waiters.front() == &cond); + f->pos_waiters.pop_front(); + } + + f->pos_locked = true; +} + +void Client::unlock_fh_pos(Fh *f) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + ldout(cct, 10) << __func__ << " " << f << dendl; + f->pos_locked = false; + if (!f->pos_waiters.empty()) { + // only wake up the oldest waiter + auto cond = f->pos_waiters.front(); + cond->notify_one(); + } +} + +int Client::uninline_data(Inode *in, Context *onfinish) +{ + if (!in->inline_data.length()) { + onfinish->complete(0); + return 0; + } + + char oid_buf[32]; + snprintf(oid_buf, sizeof(oid_buf), "%llx.00000000", (long long unsigned)in->ino); + object_t oid = oid_buf; + + ObjectOperation create_ops; + create_ops.create(false); + + objecter->mutate(oid, + OSDMap::file_to_object_locator(in->layout), + create_ops, + in->snaprealm->get_snap_context(), + ceph::real_clock::now(), + 0, + NULL); + + bufferlist inline_version_bl; + encode(in->inline_version, inline_version_bl); + + ObjectOperation uninline_ops; + uninline_ops.cmpxattr("inline_version", + CEPH_OSD_CMPXATTR_OP_GT, + CEPH_OSD_CMPXATTR_MODE_U64, + inline_version_bl); + bufferlist inline_data = in->inline_data; + uninline_ops.write(0, inline_data, in->truncate_size, in->truncate_seq); + uninline_ops.setxattr("inline_version", stringify(in->inline_version)); + + objecter->mutate(oid, + OSDMap::file_to_object_locator(in->layout), + uninline_ops, + in->snaprealm->get_snap_context(), + ceph::real_clock::now(), + 0, + onfinish); + + return 0; +} + +// + +// blocking osd interface + +int Client::read(int fd, char *buf, loff_t size, loff_t offset) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "read" << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << size << std::endl; + tout(cct) << offset << std::endl; + + std::unique_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + bufferlist bl; + /* We can't return bytes written larger than INT_MAX, clamp size to that */ + size = std::min(size, (loff_t)INT_MAX); + int r = _read(f, offset, size, &bl); + ldout(cct, 3) << "read(" << fd << ", " << (void*)buf << ", " << size << ", " << offset << ") = " << r << dendl; + if (r >= 0) { + lock.unlock(); + bl.begin().copy(bl.length(), buf); + r = bl.length(); + } + return r; +} + +int Client::preadv(int fd, const struct iovec *iov, int iovcnt, loff_t offset) +{ + if (iovcnt < 0) + return -CEPHFS_EINVAL; + return _preadv_pwritev(fd, iov, iovcnt, offset, false); +} + +int64_t Client::_read(Fh *f, int64_t offset, uint64_t size, bufferlist *bl) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + int want, have = 0; + bool movepos = false; + int64_t rc = 0; + const auto& conf = cct->_conf; + Inode *in = f->inode.get(); + utime_t lat; + utime_t start = ceph_clock_now(); + + if ((f->mode & CEPH_FILE_MODE_RD) == 0) + return -CEPHFS_EBADF; + //bool lazy = f->mode == CEPH_FILE_MODE_LAZY; + + if (offset < 0) { + lock_fh_pos(f); + offset = f->pos; + movepos = true; + } + loff_t start_pos = offset; + + if (in->inline_version == 0) { + auto r = _getattr(in, CEPH_STAT_CAP_INLINE_DATA, f->actor_perms, true); + if (r < 0) { + rc = r; + goto done; + } + ceph_assert(in->inline_version > 0); + } + +retry: + if (f->mode & CEPH_FILE_MODE_LAZY) + want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; + else + want = CEPH_CAP_FILE_CACHE; + { + auto r = get_caps(f, CEPH_CAP_FILE_RD, want, &have, -1); + if (r < 0) { + rc = r; + goto done; + } + } + if (f->flags & O_DIRECT) + have &= ~(CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO); + + if (in->inline_version < CEPH_INLINE_NONE) { + uint32_t len = in->inline_data.length(); + uint64_t endoff = offset + size; + if (endoff > in->size) + endoff = in->size; + + if (offset < len) { + if (endoff <= len) { + bl->substr_of(in->inline_data, offset, endoff - offset); + } else { + bl->substr_of(in->inline_data, offset, len - offset); + bl->append_zero(endoff - len); + } + rc = endoff - offset; + } else if ((uint64_t)offset < endoff) { + bl->append_zero(endoff - offset); + rc = endoff - offset; + } else { + rc = 0; + } + goto success; + } + + if (!conf->client_debug_force_sync_read && + conf->client_oc && + (have & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO))) { + + if (f->flags & O_RSYNC) { + _flush_range(in, offset, size); + } + rc = _read_async(f, offset, size, bl); + if (rc < 0) + goto done; + } else { + if (f->flags & O_DIRECT) + _flush_range(in, offset, size); + + bool checkeof = false; + rc = _read_sync(f, offset, size, bl, &checkeof); + if (rc < 0) + goto done; + if (checkeof) { + offset += rc; + size -= rc; + + put_cap_ref(in, CEPH_CAP_FILE_RD); + have = 0; + // reverify size + { + auto r = _getattr(in, CEPH_STAT_CAP_SIZE, f->actor_perms); + if (r < 0) { + rc = r; + goto done; + } + } + + // eof? short read. + if ((uint64_t)offset < in->size) + goto retry; + } + } + +success: + ceph_assert(rc >= 0); + update_read_io_size(bl->length()); + if (movepos) { + // adjust fd pos + f->pos = start_pos + rc; + } + + lat = ceph_clock_now(); + lat -= start; + + ++nr_read_request; + update_io_stat_read(lat); + +done: + // done! + if (have) { + put_cap_ref(in, CEPH_CAP_FILE_RD); + } + if (movepos) { + unlock_fh_pos(f); + } + return rc; +} + +Client::C_Readahead::C_Readahead(Client *c, Fh *f) : + client(c), f(f) { + f->get(); + f->readahead.inc_pending(); +} + +Client::C_Readahead::~C_Readahead() { + f->readahead.dec_pending(); + client->_put_fh(f); +} + +void Client::C_Readahead::finish(int r) { + lgeneric_subdout(client->cct, client, 20) << "client." << client->get_nodeid() << " " << "C_Readahead on " << f->inode << dendl; + client->put_cap_ref(f->inode.get(), CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE); + if (r > 0) { + client->update_read_io_size(r); + } +} + +int Client::_read_async(Fh *f, uint64_t off, uint64_t len, bufferlist *bl) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + const auto& conf = cct->_conf; + Inode *in = f->inode.get(); + + ldout(cct, 10) << __func__ << " " << *in << " " << off << "~" << len << dendl; + + // trim read based on file size? + if (off >= in->size) + return 0; + if (len == 0) + return 0; + if (off + len > in->size) { + len = in->size - off; + } + + ldout(cct, 10) << " min_bytes=" << f->readahead.get_min_readahead_size() + << " max_bytes=" << f->readahead.get_max_readahead_size() + << " max_periods=" << conf->client_readahead_max_periods << dendl; + + // read (and possibly block) + int r = 0; + C_SaferCond onfinish("Client::_read_async flock"); + r = objectcacher->file_read(&in->oset, &in->layout, in->snapid, + off, len, bl, 0, &onfinish); + if (r == 0) { + get_cap_ref(in, CEPH_CAP_FILE_CACHE); + client_lock.unlock(); + r = onfinish.wait(); + client_lock.lock(); + put_cap_ref(in, CEPH_CAP_FILE_CACHE); + update_read_io_size(bl->length()); + } + + if(f->readahead.get_min_readahead_size() > 0) { + pair<uint64_t, uint64_t> readahead_extent = f->readahead.update(off, len, in->size); + if (readahead_extent.second > 0) { + ldout(cct, 20) << "readahead " << readahead_extent.first << "~" << readahead_extent.second + << " (caller wants " << off << "~" << len << ")" << dendl; + Context *onfinish2 = new C_Readahead(this, f); + int r2 = objectcacher->file_read(&in->oset, &in->layout, in->snapid, + readahead_extent.first, readahead_extent.second, + NULL, 0, onfinish2); + if (r2 == 0) { + ldout(cct, 20) << "readahead initiated, c " << onfinish2 << dendl; + get_cap_ref(in, CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE); + } else { + ldout(cct, 20) << "readahead was no-op, already cached" << dendl; + delete onfinish2; + } + } + } + + return r; +} + +int Client::_read_sync(Fh *f, uint64_t off, uint64_t len, bufferlist *bl, + bool *checkeof) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + Inode *in = f->inode.get(); + uint64_t pos = off; + int left = len; + int read = 0; + + ldout(cct, 10) << __func__ << " " << *in << " " << off << "~" << len << dendl; + + // 0 success, 1 continue and < 0 error happen. + auto wait_and_copy = [&](C_SaferCond &onfinish, bufferlist &tbl, int wanted) { + int r = onfinish.wait(); + + // if we get ENOENT from OSD, assume 0 bytes returned + if (r == -CEPHFS_ENOENT) + r = 0; + if (r < 0) + return r; + + if (tbl.length()) { + r = tbl.length(); + + read += r; + pos += r; + left -= r; + bl->claim_append(tbl); + } + // short read? + if (r >= 0 && r < wanted) { + if (pos < in->size) { + // zero up to known EOF + int64_t some = in->size - pos; + if (some > left) + some = left; + auto z = buffer::ptr_node::create(some); + z->zero(); + bl->push_back(std::move(z)); + read += some; + pos += some; + left -= some; + if (left == 0) + return 0; + } + + *checkeof = true; + return 0; + } + return 1; + }; + + while (left > 0) { + C_SaferCond onfinish("Client::_read_sync flock"); + bufferlist tbl; + + int wanted = left; + filer->read_trunc(in->ino, &in->layout, in->snapid, + pos, left, &tbl, 0, + in->truncate_size, in->truncate_seq, + &onfinish); + client_lock.unlock(); + int r = wait_and_copy(onfinish, tbl, wanted); + client_lock.lock(); + if (!r) + return read; + if (r < 0) + return r; + } + return read; +} + +int Client::write(int fd, const char *buf, loff_t size, loff_t offset) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "write" << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << size << std::endl; + tout(cct) << offset << std::endl; + + std::scoped_lock lock(client_lock); + Fh *fh = get_filehandle(fd); + if (!fh) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (fh->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + /* We can't return bytes written larger than INT_MAX, clamp size to that */ + size = std::min(size, (loff_t)INT_MAX); + int r = _write(fh, offset, size, buf, NULL, false); + ldout(cct, 3) << "write(" << fd << ", \"...\", " << size << ", " << offset << ") = " << r << dendl; + return r; +} + +int Client::pwritev(int fd, const struct iovec *iov, int iovcnt, int64_t offset) +{ + if (iovcnt < 0) + return -CEPHFS_EINVAL; + return _preadv_pwritev(fd, iov, iovcnt, offset, true); +} + +int64_t Client::_preadv_pwritev_locked(Fh *fh, const struct iovec *iov, + unsigned iovcnt, int64_t offset, + bool write, bool clamp_to_int) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + +#if defined(__linux__) && defined(O_PATH) + if (fh->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + loff_t totallen = 0; + for (unsigned i = 0; i < iovcnt; i++) { + totallen += iov[i].iov_len; + } + + /* + * Some of the API functions take 64-bit size values, but only return + * 32-bit signed integers. Clamp the I/O sizes in those functions so that + * we don't do I/Os larger than the values we can return. + */ + if (clamp_to_int) { + totallen = std::min(totallen, (loff_t)INT_MAX); + } + if (write) { + int64_t w = _write(fh, offset, totallen, NULL, iov, iovcnt); + ldout(cct, 3) << "pwritev(" << fh << ", \"...\", " << totallen << ", " << offset << ") = " << w << dendl; + return w; + } else { + bufferlist bl; + int64_t r = _read(fh, offset, totallen, &bl); + ldout(cct, 3) << "preadv(" << fh << ", " << offset << ") = " << r << dendl; + if (r <= 0) + return r; + + client_lock.unlock(); + auto iter = bl.cbegin(); + for (unsigned j = 0, resid = r; j < iovcnt && resid > 0; j++) { + /* + * This piece of code aims to handle the case that bufferlist + * does not have enough data to fill in the iov + */ + const auto round_size = std::min<unsigned>(resid, iov[j].iov_len); + iter.copy(round_size, reinterpret_cast<char*>(iov[j].iov_base)); + resid -= round_size; + /* iter is self-updating */ + } + client_lock.lock(); + return r; + } +} + +int Client::_preadv_pwritev(int fd, const struct iovec *iov, unsigned iovcnt, int64_t offset, bool write) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << fd << std::endl; + tout(cct) << offset << std::endl; + + std::scoped_lock cl(client_lock); + Fh *fh = get_filehandle(fd); + if (!fh) + return -CEPHFS_EBADF; + return _preadv_pwritev_locked(fh, iov, iovcnt, offset, write, true); +} + +int64_t Client::_write(Fh *f, int64_t offset, uint64_t size, const char *buf, + const struct iovec *iov, int iovcnt) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + uint64_t fpos = 0; + Inode *in = f->inode.get(); + + if ( (uint64_t)(offset+size) > mdsmap->get_max_filesize() && //exceeds config + (uint64_t)(offset+size) > in->size ) { //exceeds filesize + return -CEPHFS_EFBIG; + } + //ldout(cct, 7) << "write fh " << fh << " size " << size << " offset " << offset << dendl; + + if (objecter->osdmap_pool_full(in->layout.pool_id)) { + return -CEPHFS_ENOSPC; + } + + ceph_assert(in->snapid == CEPH_NOSNAP); + + // was Fh opened as writeable? + if ((f->mode & CEPH_FILE_MODE_WR) == 0) + return -CEPHFS_EBADF; + + // use/adjust fd pos? + if (offset < 0) { + lock_fh_pos(f); + /* + * FIXME: this is racy in that we may block _after_ this point waiting for caps, and size may + * change out from under us. + */ + if (f->flags & O_APPEND) { + auto r = _lseek(f, 0, SEEK_END); + if (r < 0) { + unlock_fh_pos(f); + return r; + } + } + offset = f->pos; + fpos = offset+size; + unlock_fh_pos(f); + } + + // check quota + uint64_t endoff = offset + size; + if (endoff > in->size && is_quota_bytes_exceeded(in, endoff - in->size, + f->actor_perms)) { + return -CEPHFS_EDQUOT; + } + + //bool lazy = f->mode == CEPH_FILE_MODE_LAZY; + + ldout(cct, 10) << "cur file size is " << in->size << dendl; + + // time it. + utime_t start = ceph_clock_now(); + + if (in->inline_version == 0) { + int r = _getattr(in, CEPH_STAT_CAP_INLINE_DATA, f->actor_perms, true); + if (r < 0) + return r; + ceph_assert(in->inline_version > 0); + } + + // copy into fresh buffer (since our write may be resub, async) + bufferlist bl; + if (buf) { + if (size > 0) + bl.append(buf, size); + } else if (iov){ + for (int i = 0; i < iovcnt; i++) { + if (iov[i].iov_len > 0) { + bl.append((const char *)iov[i].iov_base, iov[i].iov_len); + } + } + } + + utime_t lat; + uint64_t totalwritten; + int want, have; + if (f->mode & CEPH_FILE_MODE_LAZY) + want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; + else + want = CEPH_CAP_FILE_BUFFER; + int r = get_caps(f, CEPH_CAP_FILE_WR|CEPH_CAP_AUTH_SHARED, want, &have, endoff); + if (r < 0) + return r; + + put_cap_ref(in, CEPH_CAP_AUTH_SHARED); + if (size > 0) { + r = clear_suid_sgid(in, f->actor_perms); + if (r < 0) { + put_cap_ref(in, CEPH_CAP_FILE_WR); + return r; + } + } + + if (f->flags & O_DIRECT) + have &= ~(CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO); + + ldout(cct, 10) << " snaprealm " << *in->snaprealm << dendl; + + std::unique_ptr<C_SaferCond> onuninline = nullptr; + + if (in->inline_version < CEPH_INLINE_NONE) { + if (endoff > cct->_conf->client_max_inline_size || + endoff > CEPH_INLINE_MAX_SIZE || + !(have & CEPH_CAP_FILE_BUFFER)) { + onuninline.reset(new C_SaferCond("Client::_write_uninline_data flock")); + uninline_data(in, onuninline.get()); + } else { + get_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + uint32_t len = in->inline_data.length(); + + if (endoff < len) + in->inline_data.begin(endoff).copy(len - endoff, bl); // XXX + + if (offset < len) + in->inline_data.splice(offset, len - offset); + else if (offset > len) + in->inline_data.append_zero(offset - len); + + in->inline_data.append(bl); + in->inline_version++; + + put_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + goto success; + } + } + + if (cct->_conf->client_oc && + (have & (CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO))) { + // do buffered write + if (!in->oset.dirty_or_tx) + get_cap_ref(in, CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_BUFFER); + + get_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + // async, caching, non-blocking. + r = objectcacher->file_write(&in->oset, &in->layout, + in->snaprealm->get_snap_context(), + offset, size, bl, ceph::real_clock::now(), + 0); + put_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + if (r < 0) + goto done; + + // flush cached write if O_SYNC is set on file fh + // O_DSYNC == O_SYNC on linux < 2.6.33 + // O_SYNC = __O_SYNC | O_DSYNC on linux >= 2.6.33 + if ((f->flags & O_SYNC) || (f->flags & O_DSYNC)) { + _flush_range(in, offset, size); + } + } else { + if (f->flags & O_DIRECT) + _flush_range(in, offset, size); + + // simple, non-atomic sync write + C_SaferCond onfinish("Client::_write flock"); + get_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + filer->write_trunc(in->ino, &in->layout, in->snaprealm->get_snap_context(), + offset, size, bl, ceph::real_clock::now(), 0, + in->truncate_size, in->truncate_seq, + &onfinish); + client_lock.unlock(); + r = onfinish.wait(); + client_lock.lock(); + put_cap_ref(in, CEPH_CAP_FILE_BUFFER); + if (r < 0) + goto done; + } + + // if we get here, write was successful, update client metadata +success: + update_write_io_size(size); + // time + lat = ceph_clock_now(); + lat -= start; + + ++nr_write_request; + update_io_stat_write(lat); + + if (fpos) { + lock_fh_pos(f); + f->pos = fpos; + unlock_fh_pos(f); + } + totalwritten = size; + r = (int64_t)totalwritten; + + // extend file? + if (totalwritten + offset > in->size) { + in->size = totalwritten + offset; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + + if (is_quota_bytes_approaching(in, f->actor_perms)) { + check_caps(in, CHECK_CAPS_NODELAY); + } else if (is_max_size_approaching(in)) { + check_caps(in, 0); + } + + ldout(cct, 7) << "wrote to " << totalwritten+offset << ", extending file size" << dendl; + } else { + ldout(cct, 7) << "wrote to " << totalwritten+offset << ", leaving file size at " << in->size << dendl; + } + + // mtime + in->mtime = in->ctime = ceph_clock_now(); + in->change_attr++; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + +done: + + if (nullptr != onuninline) { + client_lock.unlock(); + int uninline_ret = onuninline->wait(); + client_lock.lock(); + + if (uninline_ret >= 0 || uninline_ret == -CEPHFS_ECANCELED) { + in->inline_data.clear(); + in->inline_version = CEPH_INLINE_NONE; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + check_caps(in, 0); + } else + r = uninline_ret; + } + + put_cap_ref(in, CEPH_CAP_FILE_WR); + return r; +} + +int Client::_flush(Fh *f) +{ + Inode *in = f->inode.get(); + int err = f->take_async_err(); + if (err != 0) { + ldout(cct, 1) << __func__ << ": " << f << " on inode " << *in << " caught async_err = " + << cpp_strerror(err) << dendl; + } else { + ldout(cct, 10) << __func__ << ": " << f << " on inode " << *in << " no async_err state" << dendl; + } + + return err; +} + +int Client::truncate(const char *relpath, loff_t length, const UserPerm& perms) +{ + struct ceph_statx stx; + stx.stx_size = length; + return setattrx(relpath, &stx, CEPH_SETATTR_SIZE, perms); +} + +int Client::ftruncate(int fd, loff_t length, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << length << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + if ((f->mode & CEPH_FILE_MODE_WR) == 0) + return -CEPHFS_EBADF; + struct stat attr; + attr.st_size = length; + return _setattr(f->inode, &attr, CEPH_SETATTR_SIZE, perms); +} + +int Client::fsync(int fd, bool syncdataonly) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "fsync" << std::endl; + tout(cct) << fd << std::endl; + tout(cct) << syncdataonly << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (f->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + int r = _fsync(f, syncdataonly); + if (r == 0) { + // The IOs in this fsync were okay, but maybe something happened + // in the background that we shoudl be reporting? + r = f->take_async_err(); + ldout(cct, 5) << "fsync(" << fd << ", " << syncdataonly + << ") = 0, async_err = " << r << dendl; + } else { + // Assume that an error we encountered during fsync, even reported + // synchronously, would also have applied the error to the Fh, and we + // should clear it here to avoid returning the same error again on next + // call. + ldout(cct, 5) << "fsync(" << fd << ", " << syncdataonly << ") = " + << r << dendl; + f->take_async_err(); + } + return r; +} + +int Client::_fsync(Inode *in, bool syncdataonly) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + int r = 0; + std::unique_ptr<C_SaferCond> object_cacher_completion = nullptr; + ceph_tid_t flush_tid = 0; + InodeRef tmp_ref; + utime_t lat; + utime_t start = ceph_clock_now(); + + ldout(cct, 8) << "_fsync on " << *in << " " << (syncdataonly ? "(dataonly)":"(data+metadata)") << dendl; + + if (cct->_conf->client_oc) { + object_cacher_completion.reset(new C_SaferCond("Client::_fsync::lock")); + tmp_ref = in; // take a reference; C_SaferCond doesn't and _flush won't either + _flush(in, object_cacher_completion.get()); + ldout(cct, 15) << "using return-valued form of _fsync" << dendl; + } + + if (!syncdataonly && in->dirty_caps) { + check_caps(in, CHECK_CAPS_NODELAY|CHECK_CAPS_SYNCHRONOUS); + if (in->flushing_caps) + flush_tid = last_flush_tid; + } else ldout(cct, 10) << "no metadata needs to commit" << dendl; + + if (!syncdataonly && !in->unsafe_ops.empty()) { + flush_mdlog_sync(in); + + MetaRequest *req = in->unsafe_ops.back(); + ldout(cct, 15) << "waiting on unsafe requests, last tid " << req->get_tid() << dendl; + + req->get(); + wait_on_list(req->waitfor_safe); + put_request(req); + } + + if (nullptr != object_cacher_completion) { // wait on a real reply instead of guessing + client_lock.unlock(); + ldout(cct, 15) << "waiting on data to flush" << dendl; + r = object_cacher_completion->wait(); + client_lock.lock(); + ldout(cct, 15) << "got " << r << " from flush writeback" << dendl; + } else { + // FIXME: this can starve + while (in->cap_refs[CEPH_CAP_FILE_BUFFER] > 0) { + ldout(cct, 10) << "ino " << in->ino << " has " << in->cap_refs[CEPH_CAP_FILE_BUFFER] + << " uncommitted, waiting" << dendl; + wait_on_list(in->waitfor_commit); + } + } + + if (!r) { + if (flush_tid > 0) + wait_sync_caps(in, flush_tid); + + ldout(cct, 10) << "ino " << in->ino << " has no uncommitted writes" << dendl; + } else { + ldout(cct, 8) << "ino " << in->ino << " failed to commit to disk! " + << cpp_strerror(-r) << dendl; + } + + lat = ceph_clock_now(); + lat -= start; + logger->tinc(l_c_fsync, lat); + + return r; +} + +int Client::_fsync(Fh *f, bool syncdataonly) +{ + ldout(cct, 8) << "_fsync(" << f << ", " << (syncdataonly ? "dataonly)":"data+metadata)") << dendl; + return _fsync(f->inode.get(), syncdataonly); +} + +int Client::fstat(int fd, struct stat *stbuf, const UserPerm& perms, int mask) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "fstat mask " << hex << mask << dec << std::endl; + tout(cct) << fd << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + int r = _getattr(f->inode, mask, perms); + if (r < 0) + return r; + fill_stat(f->inode, stbuf, NULL); + ldout(cct, 5) << "fstat(" << fd << ", " << stbuf << ") = " << r << dendl; + return r; +} + +int Client::fstatx(int fd, struct ceph_statx *stx, const UserPerm& perms, + unsigned int want, unsigned int flags) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "fstatx flags " << hex << flags << " want " << want << dec << std::endl; + tout(cct) << fd << std::endl; + + std::scoped_lock lock(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + + unsigned mask = statx_to_mask(flags, want); + + int r = 0; + if (mask) { + r = _getattr(f->inode, mask, perms); + if (r < 0) { + ldout(cct, 3) << "fstatx exit on error!" << dendl; + return r; + } + } + + fill_statx(f->inode, mask, stx); + ldout(cct, 3) << "fstatx(" << fd << ", " << stx << ") = " << r << dendl; + return r; +} + +int Client::statxat(int dirfd, const char *relpath, + struct ceph_statx *stx, const UserPerm& perms, + unsigned int want, unsigned int flags) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + tout(cct) << __func__ << " flags " << hex << flags << " want " << want << dec << std::endl; + tout(cct) << dirfd << std::endl; + tout(cct) << relpath << std::endl; + + unsigned mask = statx_to_mask(flags, want); + + InodeRef dirinode; + std::scoped_lock lock(client_lock); + int r = get_fd_inode(dirfd, &dirinode); + if (r < 0) { + return r; + } + + InodeRef in; + filepath path(relpath); + r = path_walk(path, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW), mask, dirinode); + if (r < 0) { + return r; + } + r = _getattr(in, mask, perms); + if (r < 0) { + ldout(cct, 3) << __func__ << " exit on error!" << dendl; + return r; + } + + fill_statx(in, mask, stx); + ldout(cct, 3) << __func__ << " dirfd" << dirfd << ", r= " << r << dendl; + return r; +} + +// not written yet, but i want to link! + +int Client::chdir(const char *relpath, std::string &new_cwd, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "chdir" << std::endl; + tout(cct) << relpath << std::endl; + + filepath path(relpath); + InodeRef in; + + std::scoped_lock lock(client_lock); + int r = path_walk(path, &in, perms); + if (r < 0) + return r; + + if (!(in.get()->is_dir())) + return -CEPHFS_ENOTDIR; + + if (cwd != in) + cwd.swap(in); + ldout(cct, 3) << "chdir(" << relpath << ") cwd now " << cwd->ino << dendl; + + _getcwd(new_cwd, perms); + return 0; +} + +void Client::_getcwd(string& dir, const UserPerm& perms) +{ + filepath path; + ldout(cct, 10) << __func__ << " " << *cwd << dendl; + + Inode *in = cwd.get(); + while (in != root.get()) { + ceph_assert(in->dentries.size() < 2); // dirs can't be hard-linked + + // A cwd or ancester is unlinked + if (in->dentries.empty()) { + return; + } + + Dentry *dn = in->get_first_parent(); + + + if (!dn) { + // look it up + ldout(cct, 10) << __func__ << " looking up parent for " << *in << dendl; + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LOOKUPNAME); + filepath path(in->ino); + req->set_filepath(path); + req->set_inode(in); + int res = make_request(req, perms); + if (res < 0) + break; + + // start over + path = filepath(); + in = cwd.get(); + continue; + } + path.push_front_dentry(dn->name); + in = dn->dir->parent_inode; + } + dir = "/"; + dir += path.get_path(); +} + +void Client::getcwd(string& dir, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return; + + std::scoped_lock l(client_lock); + + _getcwd(dir, perms); +} + +int Client::statfs(const char *path, struct statvfs *stbuf, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << std::endl; + unsigned long int total_files_on_fs; + + ceph_statfs stats; + C_SaferCond cond; + + std::unique_lock lock(client_lock); + const vector<int64_t> &data_pools = mdsmap->get_data_pools(); + if (data_pools.size() == 1) { + objecter->get_fs_stats(stats, data_pools[0], &cond); + } else { + objecter->get_fs_stats(stats, std::optional<int64_t>(), &cond); + } + + lock.unlock(); + int rval = cond.wait(); + lock.lock(); + + ceph_assert(root); + total_files_on_fs = root->rstat.rfiles + root->rstat.rsubdirs; + + if (rval < 0) { + ldout(cct, 1) << "underlying call to statfs returned error: " + << cpp_strerror(rval) + << dendl; + return rval; + } + + memset(stbuf, 0, sizeof(*stbuf)); + + /* + * we're going to set a block size of 4MB so we can represent larger + * FSes without overflowing. Additionally convert the space + * measurements from KB to bytes while making them in terms of + * blocks. We use 4MB only because it is big enough, and because it + * actually *is* the (ceph) default block size. + */ + const int CEPH_BLOCK_SHIFT = 22; + stbuf->f_frsize = 1 << CEPH_BLOCK_SHIFT; + stbuf->f_bsize = 1 << CEPH_BLOCK_SHIFT; + stbuf->f_files = total_files_on_fs; + stbuf->f_ffree = -1; + stbuf->f_favail = -1; + stbuf->f_fsid = -1; // ?? + stbuf->f_flag = 0; // ?? + stbuf->f_namemax = NAME_MAX; + + // Usually quota_root will == root_ancestor, but if the mount root has no + // quota but we can see a parent of it that does have a quota, we'll + // respect that one instead. + ceph_assert(root != nullptr); + InodeRef quota_root = root->quota.is_enabled(QUOTA_MAX_BYTES) ? root : get_quota_root(root.get(), perms, QUOTA_MAX_BYTES); + + // get_quota_root should always give us something if client quotas are + // enabled + ceph_assert(cct->_conf.get_val<bool>("client_quota") == false || quota_root != nullptr); + + /* If bytes quota is set on a directory and conf option "client quota df" + * is also set, available space = quota limit - used space. Else, + * available space = total space - used space. */ + if (quota_root && cct->_conf->client_quota_df && quota_root->quota.max_bytes) { + + // Skip the getattr if any sessions are stale, as we don't want to + // block `df` if this client has e.g. been evicted, or if the MDS cluster + // is unhealthy. + if (!_any_stale_sessions()) { + int r = _getattr(quota_root, 0, perms, true); + if (r != 0) { + // Ignore return value: error getting latest inode metadata is not a good + // reason to break "df". + lderr(cct) << "Error in getattr on quota root 0x" + << std::hex << quota_root->ino << std::dec + << " statfs result may be outdated" << dendl; + } + } + + // Special case: if there is a size quota set on the Inode acting + // as the root for this client mount, then report the quota status + // as the filesystem statistics. + const fsblkcnt_t total = quota_root->quota.max_bytes >> CEPH_BLOCK_SHIFT; + const fsblkcnt_t used = quota_root->rstat.rbytes >> CEPH_BLOCK_SHIFT; + // It is possible for a quota to be exceeded: arithmetic here must + // handle case where used > total. + const fsblkcnt_t free = total > used ? total - used : 0; + + stbuf->f_blocks = total; + stbuf->f_bfree = free; + stbuf->f_bavail = free; + } else { + // General case: report the cluster statistics returned from RADOS. Because + // multiple pools may be used without one filesystem namespace via + // layouts, this is the most correct thing we can do. + stbuf->f_blocks = stats.kb >> (CEPH_BLOCK_SHIFT - 10); + stbuf->f_bfree = stats.kb_avail >> (CEPH_BLOCK_SHIFT - 10); + stbuf->f_bavail = stats.kb_avail >> (CEPH_BLOCK_SHIFT - 10); + } + + return rval; +} + +int Client::_do_filelock(Inode *in, Fh *fh, int lock_type, int op, int sleep, + struct flock *fl, uint64_t owner, bool removing) +{ + ldout(cct, 10) << __func__ << " ino " << in->ino + << (lock_type == CEPH_LOCK_FCNTL ? " fcntl" : " flock") + << " type " << fl->l_type << " owner " << owner + << " " << fl->l_start << "~" << fl->l_len << dendl; + + if (in->flags & I_ERROR_FILELOCK) + return -CEPHFS_EIO; + + int lock_cmd; + if (F_RDLCK == fl->l_type) + lock_cmd = CEPH_LOCK_SHARED; + else if (F_WRLCK == fl->l_type) + lock_cmd = CEPH_LOCK_EXCL; + else if (F_UNLCK == fl->l_type) + lock_cmd = CEPH_LOCK_UNLOCK; + else + return -CEPHFS_EIO; + + if (op != CEPH_MDS_OP_SETFILELOCK || lock_cmd == CEPH_LOCK_UNLOCK) + sleep = 0; + + /* + * Set the most significant bit, so that MDS knows the 'owner' + * is sufficient to identify the owner of lock. (old code uses + * both 'owner' and 'pid') + */ + owner |= (1ULL << 63); + + MetaRequest *req = new MetaRequest(op); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_inode(in); + + req->head.args.filelock_change.rule = lock_type; + req->head.args.filelock_change.type = lock_cmd; + req->head.args.filelock_change.owner = owner; + req->head.args.filelock_change.pid = fl->l_pid; + req->head.args.filelock_change.start = fl->l_start; + req->head.args.filelock_change.length = fl->l_len; + req->head.args.filelock_change.wait = sleep; + + int ret; + bufferlist bl; + + if (sleep && switch_interrupt_cb) { + // enable interrupt + switch_interrupt_cb(callback_handle, req->get()); + ret = make_request(req, fh->actor_perms, NULL, NULL, -1, &bl); + // disable interrupt + switch_interrupt_cb(callback_handle, NULL); + if (ret == 0 && req->aborted()) { + // effect of this lock request has been revoked by the 'lock intr' request + ret = req->get_abort_code(); + } + put_request(req); + } else { + ret = make_request(req, fh->actor_perms, NULL, NULL, -1, &bl); + } + + if (ret == 0) { + if (op == CEPH_MDS_OP_GETFILELOCK) { + ceph_filelock filelock; + auto p = bl.cbegin(); + decode(filelock, p); + + if (CEPH_LOCK_SHARED == filelock.type) + fl->l_type = F_RDLCK; + else if (CEPH_LOCK_EXCL == filelock.type) + fl->l_type = F_WRLCK; + else + fl->l_type = F_UNLCK; + + fl->l_whence = SEEK_SET; + fl->l_start = filelock.start; + fl->l_len = filelock.length; + fl->l_pid = filelock.pid; + } else if (op == CEPH_MDS_OP_SETFILELOCK) { + ceph_lock_state_t *lock_state; + if (lock_type == CEPH_LOCK_FCNTL) { + if (!in->fcntl_locks) + in->fcntl_locks.reset(new ceph_lock_state_t(cct, CEPH_LOCK_FCNTL)); + lock_state = in->fcntl_locks.get(); + } else if (lock_type == CEPH_LOCK_FLOCK) { + if (!in->flock_locks) + in->flock_locks.reset(new ceph_lock_state_t(cct, CEPH_LOCK_FLOCK)); + lock_state = in->flock_locks.get(); + } else { + ceph_abort(); + return -CEPHFS_EINVAL; + } + _update_lock_state(fl, owner, lock_state); + + if (!removing) { + if (lock_type == CEPH_LOCK_FCNTL) { + if (!fh->fcntl_locks) + fh->fcntl_locks.reset(new ceph_lock_state_t(cct, CEPH_LOCK_FCNTL)); + lock_state = fh->fcntl_locks.get(); + } else { + if (!fh->flock_locks) + fh->flock_locks.reset(new ceph_lock_state_t(cct, CEPH_LOCK_FLOCK)); + lock_state = fh->flock_locks.get(); + } + _update_lock_state(fl, owner, lock_state); + } + } else + ceph_abort(); + } + return ret; +} + +int Client::_interrupt_filelock(MetaRequest *req) +{ + // Set abort code, but do not kick. The abort code prevents the request + // from being re-sent. + req->abort(-CEPHFS_EINTR); + if (req->mds < 0) + return 0; // haven't sent the request + + Inode *in = req->inode(); + + int lock_type; + if (req->head.args.filelock_change.rule == CEPH_LOCK_FLOCK) + lock_type = CEPH_LOCK_FLOCK_INTR; + else if (req->head.args.filelock_change.rule == CEPH_LOCK_FCNTL) + lock_type = CEPH_LOCK_FCNTL_INTR; + else { + ceph_abort(); + return -CEPHFS_EINVAL; + } + + MetaRequest *intr_req = new MetaRequest(CEPH_MDS_OP_SETFILELOCK); + filepath path; + in->make_nosnap_relative_path(path); + intr_req->set_filepath(path); + intr_req->set_inode(in); + intr_req->head.args.filelock_change = req->head.args.filelock_change; + intr_req->head.args.filelock_change.rule = lock_type; + intr_req->head.args.filelock_change.type = CEPH_LOCK_UNLOCK; + + UserPerm perms(req->get_uid(), req->get_gid()); + return make_request(intr_req, perms, NULL, NULL, -1); +} + +void Client::_encode_filelocks(Inode *in, bufferlist& bl) +{ + if (!in->fcntl_locks && !in->flock_locks) + return; + + unsigned nr_fcntl_locks = in->fcntl_locks ? in->fcntl_locks->held_locks.size() : 0; + encode(nr_fcntl_locks, bl); + if (nr_fcntl_locks) { + auto &lock_state = in->fcntl_locks; + for(auto p = lock_state->held_locks.begin(); + p != lock_state->held_locks.end(); + ++p) + encode(p->second, bl); + } + + unsigned nr_flock_locks = in->flock_locks ? in->flock_locks->held_locks.size() : 0; + encode(nr_flock_locks, bl); + if (nr_flock_locks) { + auto &lock_state = in->flock_locks; + for(auto p = lock_state->held_locks.begin(); + p != lock_state->held_locks.end(); + ++p) + encode(p->second, bl); + } + + ldout(cct, 10) << __func__ << " ino " << in->ino << ", " << nr_fcntl_locks + << " fcntl locks, " << nr_flock_locks << " flock locks" << dendl; +} + +void Client::_release_filelocks(Fh *fh) +{ + if (!fh->fcntl_locks && !fh->flock_locks) + return; + + Inode *in = fh->inode.get(); + ldout(cct, 10) << __func__ << " " << fh << " ino " << in->ino << dendl; + + list<ceph_filelock> activated_locks; + + list<pair<int, ceph_filelock> > to_release; + + if (fh->fcntl_locks) { + auto &lock_state = fh->fcntl_locks; + for(auto p = lock_state->held_locks.begin(); p != lock_state->held_locks.end(); ) { + auto q = p++; + if (in->flags & I_ERROR_FILELOCK) { + lock_state->remove_lock(q->second, activated_locks); + } else { + to_release.push_back(pair<int, ceph_filelock>(CEPH_LOCK_FCNTL, q->second)); + } + } + lock_state.reset(); + } + if (fh->flock_locks) { + auto &lock_state = fh->flock_locks; + for(auto p = lock_state->held_locks.begin(); p != lock_state->held_locks.end(); ) { + auto q = p++; + if (in->flags & I_ERROR_FILELOCK) { + lock_state->remove_lock(q->second, activated_locks); + } else { + to_release.push_back(pair<int, ceph_filelock>(CEPH_LOCK_FLOCK, q->second)); + } + } + lock_state.reset(); + } + + if ((in->flags & I_ERROR_FILELOCK) && !in->has_any_filelocks()) + in->flags &= ~I_ERROR_FILELOCK; + + if (to_release.empty()) + return; + + struct flock fl; + memset(&fl, 0, sizeof(fl)); + fl.l_whence = SEEK_SET; + fl.l_type = F_UNLCK; + + for (list<pair<int, ceph_filelock> >::iterator p = to_release.begin(); + p != to_release.end(); + ++p) { + fl.l_start = p->second.start; + fl.l_len = p->second.length; + fl.l_pid = p->second.pid; + _do_filelock(in, fh, p->first, CEPH_MDS_OP_SETFILELOCK, 0, &fl, + p->second.owner, true); + } +} + +void Client::_update_lock_state(struct flock *fl, uint64_t owner, + ceph_lock_state_t *lock_state) +{ + int lock_cmd; + if (F_RDLCK == fl->l_type) + lock_cmd = CEPH_LOCK_SHARED; + else if (F_WRLCK == fl->l_type) + lock_cmd = CEPH_LOCK_EXCL; + else + lock_cmd = CEPH_LOCK_UNLOCK;; + + ceph_filelock filelock; + filelock.start = fl->l_start; + filelock.length = fl->l_len; + filelock.client = 0; + // see comment in _do_filelock() + filelock.owner = owner | (1ULL << 63); + filelock.pid = fl->l_pid; + filelock.type = lock_cmd; + + if (filelock.type == CEPH_LOCK_UNLOCK) { + list<ceph_filelock> activated_locks; + lock_state->remove_lock(filelock, activated_locks); + } else { + bool r = lock_state->add_lock(filelock, false, false, NULL); + ceph_assert(r); + } +} + +int Client::_getlk(Fh *fh, struct flock *fl, uint64_t owner) +{ + Inode *in = fh->inode.get(); + ldout(cct, 10) << "_getlk " << fh << " ino " << in->ino << dendl; + int ret = _do_filelock(in, fh, CEPH_LOCK_FCNTL, CEPH_MDS_OP_GETFILELOCK, 0, fl, owner); + return ret; +} + +int Client::_setlk(Fh *fh, struct flock *fl, uint64_t owner, int sleep) +{ + Inode *in = fh->inode.get(); + ldout(cct, 10) << "_setlk " << fh << " ino " << in->ino << dendl; + int ret = _do_filelock(in, fh, CEPH_LOCK_FCNTL, CEPH_MDS_OP_SETFILELOCK, sleep, fl, owner); + ldout(cct, 10) << "_setlk " << fh << " ino " << in->ino << " result=" << ret << dendl; + return ret; +} + +int Client::_flock(Fh *fh, int cmd, uint64_t owner) +{ + Inode *in = fh->inode.get(); + ldout(cct, 10) << "_flock " << fh << " ino " << in->ino << dendl; + + int sleep = !(cmd & LOCK_NB); + cmd &= ~LOCK_NB; + + int type; + switch (cmd) { + case LOCK_SH: + type = F_RDLCK; + break; + case LOCK_EX: + type = F_WRLCK; + break; + case LOCK_UN: + type = F_UNLCK; + break; + default: + return -CEPHFS_EINVAL; + } + + struct flock fl; + memset(&fl, 0, sizeof(fl)); + fl.l_type = type; + fl.l_whence = SEEK_SET; + + int ret = _do_filelock(in, fh, CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK, sleep, &fl, owner); + ldout(cct, 10) << "_flock " << fh << " ino " << in->ino << " result=" << ret << dendl; + return ret; +} + +int Client::get_snap_info(const char *path, const UserPerm &perms, SnapInfo *snap_info) { + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) { + return -CEPHFS_ENOTCONN; + } + + std::scoped_lock lock(client_lock); + InodeRef in; + int r = Client::path_walk(path, &in, perms, true); + if (r < 0) { + return r; + } + + if (in->snapid == CEPH_NOSNAP) { + return -CEPHFS_EINVAL; + } + + snap_info->id = in->snapid; + snap_info->metadata = in->snap_metadata; + return 0; +} + +int Client::ll_statfs(Inode *in, struct statvfs *stbuf, const UserPerm& perms) +{ + /* Since the only thing this does is wrap a call to statfs, and + statfs takes a lock, it doesn't seem we have a need to split it + out. */ + return statfs(0, stbuf, perms); +} + +void Client::_ll_register_callbacks(struct ceph_client_callback_args *args) +{ + if (!args) + return; + + ldout(cct, 10) << __func__ << " cb " << args->handle + << " invalidate_ino_cb " << args->ino_cb + << " invalidate_dentry_cb " << args->dentry_cb + << " switch_interrupt_cb " << args->switch_intr_cb + << " remount_cb " << args->remount_cb + << dendl; + callback_handle = args->handle; + if (args->ino_cb) { + ino_invalidate_cb = args->ino_cb; + async_ino_invalidator.start(); + } + if (args->dentry_cb) { + dentry_invalidate_cb = args->dentry_cb; + async_dentry_invalidator.start(); + } + if (args->switch_intr_cb) { + switch_interrupt_cb = args->switch_intr_cb; + interrupt_finisher.start(); + } + if (args->remount_cb) { + remount_cb = args->remount_cb; + remount_finisher.start(); + } + if (args->ino_release_cb) { + ino_release_cb = args->ino_release_cb; + async_ino_releasor.start(); + } + if (args->umask_cb) + umask_cb = args->umask_cb; +} + +// This is deprecated, use ll_register_callbacks2() instead. +void Client::ll_register_callbacks(struct ceph_client_callback_args *args) +{ + ceph_assert(!is_mounting() && !is_mounted() && !is_unmounting()); + + _ll_register_callbacks(args); +} + +int Client::ll_register_callbacks2(struct ceph_client_callback_args *args) +{ + if (is_mounting() || is_mounted() || is_unmounting()) + return -CEPHFS_EBUSY; + + _ll_register_callbacks(args); + return 0; +} + +std::pair<int, bool> Client::test_dentry_handling(bool can_invalidate) +{ + std::pair <int, bool> r(0, false); + + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + if (!iref_reader.is_state_satisfied()) + return std::make_pair(-CEPHFS_ENOTCONN, false); + + can_invalidate_dentries = can_invalidate; + + /* + * Force to use the old and slow method to invalidate the dcache + * if the euid is non-root, or the remount may fail with return + * code 1 or 32. + */ + uid_t euid = geteuid(); + ldout(cct, 10) << "euid: " << euid << dendl; + if (euid != 0) { + can_invalidate_dentries = true; + } + + if (can_invalidate_dentries) { + ceph_assert(dentry_invalidate_cb); + ldout(cct, 1) << "using dentry_invalidate_cb" << dendl; + } else { + ceph_assert(remount_cb); + ldout(cct, 1) << "using remount_cb" << dendl; + r = _do_remount(false); + } + + return r; +} + +int Client::_sync_fs() +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + ldout(cct, 10) << __func__ << dendl; + + // flush file data + std::unique_ptr<C_SaferCond> cond = nullptr; + if (cct->_conf->client_oc) { + cond.reset(new C_SaferCond("Client::_sync_fs:lock")); + objectcacher->flush_all(cond.get()); + } + + // flush caps + flush_caps_sync(); + ceph_tid_t flush_tid = last_flush_tid; + + // flush the mdlog before waiting for unsafe requests. + flush_mdlog_sync(); + + // wait for unsafe mds requests + wait_unsafe_requests(); + + wait_sync_caps(flush_tid); + + if (nullptr != cond) { + client_lock.unlock(); + ldout(cct, 15) << __func__ << " waiting on data to flush" << dendl; + cond->wait(); + ldout(cct, 15) << __func__ << " flush finished" << dendl; + client_lock.lock(); + } + + return 0; +} + +int Client::sync_fs() +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock l(client_lock); + + return _sync_fs(); +} + +int64_t Client::drop_caches() +{ + std::scoped_lock l(client_lock); + return objectcacher->release_all(); +} + +int Client::_lazyio(Fh *fh, int enable) +{ + Inode *in = fh->inode.get(); + ldout(cct, 20) << __func__ << " " << *in << " " << !!enable << dendl; + + if (!!(fh->mode & CEPH_FILE_MODE_LAZY) == !!enable) + return 0; + + int orig_mode = fh->mode; + if (enable) { + fh->mode |= CEPH_FILE_MODE_LAZY; + in->get_open_ref(fh->mode); + in->put_open_ref(orig_mode); + check_caps(in, CHECK_CAPS_NODELAY); + } else { + fh->mode &= ~CEPH_FILE_MODE_LAZY; + in->get_open_ref(fh->mode); + in->put_open_ref(orig_mode); + check_caps(in, 0); + } + + return 0; +} + +int Client::lazyio(int fd, int enable) +{ + std::scoped_lock l(client_lock); + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + + return _lazyio(f, enable); +} + +int Client::ll_lazyio(Fh *fh, int enable) +{ + ldout(cct, 3) << __func__ << " " << fh << " " << fh->inode->ino << " " << !!enable << dendl; + tout(cct) << __func__ << std::endl; + + std::scoped_lock lock(client_lock); + return _lazyio(fh, enable); +} + +int Client::lazyio_propagate(int fd, loff_t offset, size_t count) +{ + std::scoped_lock l(client_lock); + ldout(cct, 3) << "op: client->lazyio_propagate(" << fd + << ", " << offset << ", " << count << ")" << dendl; + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + + // for now + _fsync(f, true); + + return 0; +} + +int Client::lazyio_synchronize(int fd, loff_t offset, size_t count) +{ + std::scoped_lock l(client_lock); + ldout(cct, 3) << "op: client->lazyio_synchronize(" << fd + << ", " << offset << ", " << count << ")" << dendl; + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + Inode *in = f->inode.get(); + + _fsync(f, true); + if (_release(in)) { + int r =_getattr(in, CEPH_STAT_CAP_SIZE, f->actor_perms); + if (r < 0) + return r; + } + return 0; +} + + +// ============================= +// snaps + +int Client::mksnap(const char *relpath, const char *name, const UserPerm& perm, + mode_t mode, const std::map<std::string, std::string> &metadata) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock l(client_lock); + + filepath path(relpath); + InodeRef in; + int r = path_walk(path, &in, perm); + if (r < 0) + return r; + if (cct->_conf->client_permissions) { + r = may_create(in.get(), perm); + if (r < 0) + return r; + } + Inode *snapdir = open_snapdir(in.get()); + return _mkdir(snapdir, name, mode, perm, nullptr, metadata); +} + +int Client::rmsnap(const char *relpath, const char *name, const UserPerm& perms, bool check_perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock l(client_lock); + + filepath path(relpath); + InodeRef in; + int r = path_walk(path, &in, perms); + if (r < 0) + return r; + Inode *snapdir = open_snapdir(in.get()); + if (cct->_conf->client_permissions) { + r = may_delete(snapdir, check_perms ? name : NULL, perms); + if (r < 0) + return r; + } + return _rmdir(snapdir, name, perms); +} + +// ============================= +// expose caps + +int Client::get_caps_issued(int fd) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + + return f->inode->caps_issued(); +} + +int Client::get_caps_issued(const char *path, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + filepath p(path); + InodeRef in; + int r = path_walk(p, &in, perms, true); + if (r < 0) + return r; + return in->caps_issued(); +} + +// ========================================= +// low level + +void Client::refresh_snapdir_attrs(Inode *in, Inode *diri) { + ldout(cct, 10) << __func__ << ": snapdir inode=" << *in + << ", inode=" << *diri << dendl; + in->ino = diri->ino; + in->snapid = CEPH_SNAPDIR; + in->mode = diri->mode; + in->uid = diri->uid; + in->gid = diri->gid; + in->nlink = 1; + in->mtime = diri->snaprealm->last_modified; + in->ctime = in->mtime; + in->change_attr = diri->snaprealm->change_attr; + in->btime = diri->btime; + in->atime = diri->atime; + in->size = diri->size; + + in->dirfragtree.clear(); + in->snapdir_parent = diri; + // copy posix acls to snapshotted inode + in->xattrs.clear(); + for (auto &[xattr_key, xattr_value] : diri->xattrs) { + if (xattr_key.rfind("system.", 0) == 0) { + in->xattrs[xattr_key] = xattr_value; + } + } +} + +Inode *Client::open_snapdir(Inode *diri) +{ + Inode *in; + vinodeno_t vino(diri->ino, CEPH_SNAPDIR); + if (!inode_map.count(vino)) { + in = new Inode(this, vino, &diri->layout); + refresh_snapdir_attrs(in, diri); + diri->flags |= I_SNAPDIR_OPEN; + inode_map[vino] = in; + if (use_faked_inos()) + _assign_faked_ino(in); + ldout(cct, 10) << "open_snapdir created snapshot inode " << *in << dendl; + } else { + in = inode_map[vino]; + ldout(cct, 10) << "open_snapdir had snapshot inode " << *in << dendl; + } + return in; +} + +int Client::ll_lookup(Inode *parent, const char *name, struct stat *attr, + Inode **out, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + ldout(cct, 3) << __func__ << " " << vparent << " " << name << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + + int r = 0; + if (!fuse_default_permissions) { + if (strcmp(name, ".") && strcmp(name, "..")) { + r = may_lookup(parent, perms); + if (r < 0) + return r; + } + } + + string dname(name); + InodeRef in; + + r = _lookup(parent, dname, CEPH_STAT_CAP_INODE_ALL, &in, perms); + if (r < 0) { + attr->st_ino = 0; + goto out; + } + + ceph_assert(in); + fill_stat(in, attr); + _ll_get(in.get()); + + out: + ldout(cct, 3) << __func__ << " " << vparent << " " << name + << " -> " << r << " (" << hex << attr->st_ino << dec << ")" << dendl; + tout(cct) << attr->st_ino << std::endl; + *out = in.get(); + return r; +} + +int Client::ll_lookup_vino( + vinodeno_t vino, + const UserPerm& perms, + Inode **inode) +{ + ceph_assert(inode != NULL); + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + if (is_reserved_vino(vino)) + return -CEPHFS_ESTALE; + + std::scoped_lock lock(client_lock); + ldout(cct, 3) << __func__ << " " << vino << dendl; + + // Check the cache first + unordered_map<vinodeno_t,Inode*>::iterator p = inode_map.find(vino); + if (p != inode_map.end()) { + *inode = p->second; + _ll_get(*inode); + return 0; + } + + uint64_t snapid = vino.snapid; + + // for snapdir, find the non-snapped dir inode + if (snapid == CEPH_SNAPDIR) + vino.snapid = CEPH_NOSNAP; + + int r = _lookup_vino(vino, perms, inode); + if (r) + return r; + ceph_assert(*inode != NULL); + + if (snapid == CEPH_SNAPDIR) { + Inode *tmp = *inode; + + // open the snapdir and put the inode ref + *inode = open_snapdir(tmp); + _ll_forget(tmp, 1); + _ll_get(*inode); + } + return 0; +} + +int Client::ll_lookup_inode( + struct inodeno_t ino, + const UserPerm& perms, + Inode **inode) +{ + vinodeno_t vino(ino, CEPH_NOSNAP); + return ll_lookup_vino(vino, perms, inode); +} + +int Client::ll_lookupx(Inode *parent, const char *name, Inode **out, + struct ceph_statx *stx, unsigned want, unsigned flags, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + ldout(cct, 3) << __func__ << " " << vparent << " " << name << dendl; + tout(cct) << "ll_lookupx" << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + + int r = 0; + if (!fuse_default_permissions) { + r = may_lookup(parent, perms); + if (r < 0) + return r; + } + + string dname(name); + InodeRef in; + + unsigned mask = statx_to_mask(flags, want); + r = _lookup(parent, dname, mask, &in, perms); + if (r < 0) { + stx->stx_ino = 0; + stx->stx_mask = 0; + } else { + ceph_assert(in); + fill_statx(in, mask, stx); + _ll_get(in.get()); + } + + ldout(cct, 3) << __func__ << " " << vparent << " " << name + << " -> " << r << " (" << hex << stx->stx_ino << dec << ")" << dendl; + tout(cct) << stx->stx_ino << std::endl; + *out = in.get(); + return r; +} + +int Client::ll_walk(const char* name, Inode **out, struct ceph_statx *stx, + unsigned int want, unsigned int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + filepath fp(name, 0); + InodeRef in; + int rc; + unsigned mask = statx_to_mask(flags, want); + + ldout(cct, 3) << __func__ << " " << name << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + rc = path_walk(fp, &in, perms, !(flags & AT_SYMLINK_NOFOLLOW), mask); + if (rc < 0) { + /* zero out mask, just in case... */ + stx->stx_mask = 0; + stx->stx_ino = 0; + *out = NULL; + return rc; + } else { + ceph_assert(in); + fill_statx(in, mask, stx); + _ll_get(in.get()); + *out = in.get(); + return 0; + } +} + +void Client::_ll_get(Inode *in) +{ + if (in->ll_ref == 0) { + in->iget(); + if (in->is_dir() && !in->dentries.empty()) { + ceph_assert(in->dentries.size() == 1); // dirs can't be hard-linked + in->get_first_parent()->get(); // pin dentry + } + if (in->snapid != CEPH_NOSNAP) + ll_snap_ref[in->snapid]++; + } + in->ll_get(); + ldout(cct, 20) << __func__ << " " << in << " " << in->ino << " -> " << in->ll_ref << dendl; +} + +int Client::_ll_put(Inode *in, uint64_t num) +{ + in->ll_put(num); + ldout(cct, 20) << __func__ << " " << in << " " << in->ino << " " << num << " -> " << in->ll_ref << dendl; + if (in->ll_ref == 0) { + if (in->is_dir() && !in->dentries.empty()) { + ceph_assert(in->dentries.size() == 1); // dirs can't be hard-linked + in->get_first_parent()->put(); // unpin dentry + } + if (in->snapid != CEPH_NOSNAP) { + auto p = ll_snap_ref.find(in->snapid); + ceph_assert(p != ll_snap_ref.end()); + ceph_assert(p->second > 0); + if (--p->second == 0) + ll_snap_ref.erase(p); + } + put_inode(in); + return 0; + } else { + return in->ll_ref; + } +} + +void Client::_ll_drop_pins() +{ + ldout(cct, 10) << __func__ << dendl; + std::set<InodeRef> to_be_put; //this set will be deconstructed item by item when exit + ceph::unordered_map<vinodeno_t, Inode*>::iterator next; + for (ceph::unordered_map<vinodeno_t, Inode*>::iterator it = inode_map.begin(); + it != inode_map.end(); + it = next) { + Inode *in = it->second; + next = it; + ++next; + if (in->ll_ref){ + to_be_put.insert(in); + _ll_put(in, in->ll_ref); + } + } +} + +bool Client::_ll_forget(Inode *in, uint64_t count) +{ + inodeno_t ino = in->ino; + + ldout(cct, 8) << __func__ << " " << ino << " " << count << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << ino.val << std::endl; + tout(cct) << count << std::endl; + + // Ignore forget if we're no longer mounted + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return true; + + if (ino == 1) return true; // ignore forget on root. + + bool last = false; + if (in->ll_ref < count) { + ldout(cct, 1) << "WARNING: ll_forget on " << ino << " " << count + << ", which only has ll_ref=" << in->ll_ref << dendl; + _ll_put(in, in->ll_ref); + last = true; + } else { + if (_ll_put(in, count) == 0) + last = true; + } + + return last; +} + +bool Client::ll_forget(Inode *in, uint64_t count) +{ + std::scoped_lock lock(client_lock); + return _ll_forget(in, count); +} + +bool Client::ll_put(Inode *in) +{ + /* ll_forget already takes the lock */ + return ll_forget(in, 1); +} + +int Client::ll_get_snap_ref(snapid_t snap) +{ + std::scoped_lock lock(client_lock); + auto p = ll_snap_ref.find(snap); + if (p != ll_snap_ref.end()) + return p->second; + return 0; +} + +snapid_t Client::ll_get_snapid(Inode *in) +{ + std::scoped_lock lock(client_lock); + return in->snapid; +} + +Inode *Client::ll_get_inode(ino_t ino) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return NULL; + + std::scoped_lock lock(client_lock); + + vinodeno_t vino = _map_faked_ino(ino); + unordered_map<vinodeno_t,Inode*>::iterator p = inode_map.find(vino); + if (p == inode_map.end()) + return NULL; + Inode *in = p->second; + _ll_get(in); + return in; +} + +Inode *Client::ll_get_inode(vinodeno_t vino) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return NULL; + + if (is_reserved_vino(vino)) + return NULL; + + std::scoped_lock lock(client_lock); + + unordered_map<vinodeno_t,Inode*>::iterator p = inode_map.find(vino); + if (p == inode_map.end()) + return NULL; + Inode *in = p->second; + _ll_get(in); + return in; +} + +int Client::_ll_getattr(Inode *in, int caps, const UserPerm& perms) +{ + vinodeno_t vino = _get_vino(in); + + ldout(cct, 8) << __func__ << " " << vino << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << vino.ino.val << std::endl; + + if (vino.snapid < CEPH_NOSNAP) + return 0; + else + return _getattr(in, caps, perms); +} + +int Client::ll_getattr(Inode *in, struct stat *attr, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + int res = _ll_getattr(in, CEPH_STAT_CAP_INODE_ALL, perms); + + if (res == 0) + fill_stat(in, attr); + ldout(cct, 3) << __func__ << " " << _get_vino(in) << " = " << res << dendl; + return res; +} + +int Client::ll_getattrx(Inode *in, struct ceph_statx *stx, unsigned int want, + unsigned int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + int res = 0; + unsigned mask = statx_to_mask(flags, want); + + if (mask && !in->caps_issued_mask(mask, true)) + res = _ll_getattr(in, mask, perms); + + if (res == 0) + fill_statx(in, mask, stx); + ldout(cct, 3) << __func__ << " " << _get_vino(in) << " = " << res << dendl; + return res; +} + +int Client::_ll_setattrx(Inode *in, struct ceph_statx *stx, int mask, + const UserPerm& perms, InodeRef *inp) +{ + vinodeno_t vino = _get_vino(in); + + ldout(cct, 8) << __func__ << " " << vino << " mask " << hex << mask << dec + << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << stx->stx_mode << std::endl; + tout(cct) << stx->stx_uid << std::endl; + tout(cct) << stx->stx_gid << std::endl; + tout(cct) << stx->stx_size << std::endl; + tout(cct) << stx->stx_mtime << std::endl; + tout(cct) << stx->stx_atime << std::endl; + tout(cct) << stx->stx_btime << std::endl; + tout(cct) << mask << std::endl; + + if (!fuse_default_permissions) { + int res = may_setattr(in, stx, mask, perms); + if (res < 0) + return res; + } + + mask &= ~(CEPH_SETATTR_MTIME_NOW | CEPH_SETATTR_ATIME_NOW); + + return __setattrx(in, stx, mask, perms, inp); +} + +int Client::ll_setattrx(Inode *in, struct ceph_statx *stx, int mask, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef target(in); + int res = _ll_setattrx(in, stx, mask, perms, &target); + if (res == 0) { + ceph_assert(in == target.get()); + fill_statx(in, in->caps_issued(), stx); + } + + ldout(cct, 3) << __func__ << " " << _get_vino(in) << " = " << res << dendl; + return res; +} + +int Client::ll_setattr(Inode *in, struct stat *attr, int mask, + const UserPerm& perms) +{ + struct ceph_statx stx; + stat_to_statx(attr, &stx); + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef target(in); + int res = _ll_setattrx(in, &stx, mask, perms, &target); + if (res == 0) { + ceph_assert(in == target.get()); + fill_stat(in, attr); + } + + ldout(cct, 3) << __func__ << " " << _get_vino(in) << " = " << res << dendl; + return res; +} + + +// ---------- +// xattrs + +int Client::getxattr(const char *path, const char *name, void *value, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, true, CEPH_STAT_CAP_XATTR); + if (r < 0) + return r; + return _getxattr(in, name, value, size, perms); +} + +int Client::lgetxattr(const char *path, const char *name, void *value, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, false, CEPH_STAT_CAP_XATTR); + if (r < 0) + return r; + return _getxattr(in, name, value, size, perms); +} + +int Client::fgetxattr(int fd, const char *name, void *value, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + return _getxattr(f->inode, name, value, size, perms); +} + +int Client::listxattr(const char *path, char *list, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, true, CEPH_STAT_CAP_XATTR); + if (r < 0) + return r; + return Client::_listxattr(in.get(), list, size, perms); +} + +int Client::llistxattr(const char *path, char *list, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, false, CEPH_STAT_CAP_XATTR); + if (r < 0) + return r; + return Client::_listxattr(in.get(), list, size, perms); +} + +int Client::flistxattr(int fd, char *list, size_t size, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + return Client::_listxattr(f->inode.get(), list, size, perms); +} + +int Client::removexattr(const char *path, const char *name, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, true); + if (r < 0) + return r; + return _removexattr(in, name, perms); +} + +int Client::lremovexattr(const char *path, const char *name, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, false); + if (r < 0) + return r; + return _removexattr(in, name, perms); +} + +int Client::fremovexattr(int fd, const char *name, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + return _removexattr(f->inode, name, perms); +} + +int Client::setxattr(const char *path, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + _setxattr_maybe_wait_for_osdmap(name, value, size); + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, true); + if (r < 0) + return r; + return _setxattr(in, name, value, size, flags, perms); +} + +int Client::lsetxattr(const char *path, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + _setxattr_maybe_wait_for_osdmap(name, value, size); + + std::scoped_lock lock(client_lock); + + InodeRef in; + int r = Client::path_walk(path, &in, perms, false); + if (r < 0) + return r; + return _setxattr(in, name, value, size, flags, perms); +} + +int Client::fsetxattr(int fd, const char *name, const void *value, size_t size, + int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + _setxattr_maybe_wait_for_osdmap(name, value, size); + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + return _setxattr(f->inode, name, value, size, flags, perms); +} + +int Client::_getxattr(Inode *in, const char *name, void *value, size_t size, + const UserPerm& perms) +{ + int r; + const VXattr *vxattr = nullptr; + + vxattr = _match_vxattr(in, name); + if (vxattr) { + r = -CEPHFS_ENODATA; + + // Do a force getattr to get the latest quota before returning + // a value to userspace. + int flags = 0; + if (vxattr->flags & VXATTR_RSTAT) { + flags |= CEPH_STAT_RSTAT; + } + if (vxattr->flags & VXATTR_DIRSTAT) { + flags |= CEPH_CAP_FILE_SHARED; + } + r = _getattr(in, flags | CEPH_STAT_CAP_XATTR, perms, true); + if (r != 0) { + // Error from getattr! + return r; + } + + // call pointer-to-member function + char buf[256]; + if (!(vxattr->exists_cb && !(this->*(vxattr->exists_cb))(in))) { + r = (this->*(vxattr->getxattr_cb))(in, buf, sizeof(buf)); + } else { + r = -CEPHFS_ENODATA; + } + + if (size != 0) { + if (r > (int)size) { + r = -CEPHFS_ERANGE; + } else if (r > 0) { + memcpy(value, buf, r); + } + } + goto out; + } + + if (!strncmp(name, "ceph.", 5)) { + r = _getvxattr(in, perms, name, size, value, MDS_RANK_NONE); + goto out; + } + + if (acl_type == NO_ACL && !strncmp(name, "system.", 7)) { + r = -CEPHFS_EOPNOTSUPP; + goto out; + } + + r = _getattr(in, CEPH_STAT_CAP_XATTR, perms, in->xattr_version == 0); + if (r == 0) { + string n(name); + r = -CEPHFS_ENODATA; + if (in->xattrs.count(n)) { + r = in->xattrs[n].length(); + if (r > 0 && size != 0) { + if (size >= (unsigned)r) + memcpy(value, in->xattrs[n].c_str(), r); + else + r = -CEPHFS_ERANGE; + } + } + } + out: + ldout(cct, 8) << "_getxattr(" << in->ino << ", \"" << name << "\", " << size << ") = " << r << dendl; + return r; +} + +int Client::_getxattr(InodeRef &in, const char *name, void *value, size_t size, + const UserPerm& perms) +{ + if (cct->_conf->client_permissions) { + int r = xattr_permission(in.get(), name, MAY_READ, perms); + if (r < 0) + return r; + } + return _getxattr(in.get(), name, value, size, perms); +} + +int Client::ll_getxattr(Inode *in, const char *name, void *value, + size_t size, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << __func__ << " " << vino << " " << name << " size " << size << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + if (!fuse_default_permissions) { + int r = xattr_permission(in, name, MAY_READ, perms); + if (r < 0) + return r; + } + + return _getxattr(in, name, value, size, perms); +} + +int Client::_listxattr(Inode *in, char *name, size_t size, + const UserPerm& perms) +{ + bool len_only = (size == 0); + int r = _getattr(in, CEPH_STAT_CAP_XATTR, perms, in->xattr_version == 0); + if (r != 0) { + goto out; + } + + r = 0; + for ([[maybe_unused]] const auto &[xattr_name, xattr_value_bl] : in->xattrs) { + if (xattr_name.rfind("ceph.", 0) == 0) { + continue; + } + + size_t this_len = xattr_name.length() + 1; + r += this_len; + if (len_only) + continue; + + if (this_len > size) { + r = -CEPHFS_ERANGE; + goto out; + } + + memcpy(name, xattr_name.c_str(), this_len); + name += this_len; + size -= this_len; + } +out: + ldout(cct, 8) << __func__ << "(" << in->ino << ", " << size << ") = " << r << dendl; + return r; +} + +int Client::ll_listxattr(Inode *in, char *names, size_t size, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << __func__ << " " << vino << " size " << size << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << size << std::endl; + + std::scoped_lock lock(client_lock); + return _listxattr(in, names, size, perms); +} + +int Client::_do_setxattr(Inode *in, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + + int xattr_flags = 0; + if (!value) + xattr_flags |= CEPH_XATTR_REMOVE; + if (flags & XATTR_CREATE) + xattr_flags |= CEPH_XATTR_CREATE; + if (flags & XATTR_REPLACE) + xattr_flags |= CEPH_XATTR_REPLACE; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_SETXATTR); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_string2(name); + req->set_inode(in); + req->head.args.setxattr.flags = xattr_flags; + + bufferlist bl; + ceph_assert(value || size == 0); + bl.append((const char*)value, size); + req->set_data(bl); + + int res = make_request(req, perms); + + trim_cache(); + ldout(cct, 3) << __func__ << "(" << in->ino << ", \"" << name << "\") = " << + res << dendl; + return res; +} + +int Client::_setxattr(Inode *in, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + if (in->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + + if (size == 0) { + value = ""; + } else if (value == NULL) { + return -CEPHFS_EINVAL; + } + + bool posix_acl_xattr = false; + if (acl_type == POSIX_ACL) + posix_acl_xattr = !strncmp(name, "system.", 7); + + if (strncmp(name, "user.", 5) && + strncmp(name, "security.", 9) && + strncmp(name, "trusted.", 8) && + strncmp(name, "ceph.", 5) && + !posix_acl_xattr) + return -CEPHFS_EOPNOTSUPP; + + bool check_realm = false; + + if (posix_acl_xattr) { + if (!strcmp(name, ACL_EA_ACCESS)) { + mode_t new_mode = in->mode; + if (value) { + int ret = posix_acl_equiv_mode(value, size, &new_mode); + if (ret < 0) + return ret; + if (ret == 0) { + value = NULL; + size = 0; + } + if (new_mode != in->mode) { + struct ceph_statx stx; + stx.stx_mode = new_mode; + ret = _do_setattr(in, &stx, CEPH_SETATTR_MODE, perms, nullptr); + if (ret < 0) + return ret; + } + } + } else if (!strcmp(name, ACL_EA_DEFAULT)) { + if (value) { + if (!S_ISDIR(in->mode)) + return -CEPHFS_EACCES; + int ret = posix_acl_check(value, size); + if (ret < 0) + return -CEPHFS_EINVAL; + if (ret == 0) { + value = NULL; + size = 0; + } + } + } else { + return -CEPHFS_EOPNOTSUPP; + } + } else { + const VXattr *vxattr = _match_vxattr(in, name); + if (vxattr) { + if (vxattr->readonly) + return -CEPHFS_EOPNOTSUPP; + if (vxattr->setxattr_cb) + return (this->*(vxattr->setxattr_cb))(in, value, size, perms); + if (vxattr->name.compare(0, 10, "ceph.quota") == 0 && value) + check_realm = true; + } + } + + int ret = _do_setxattr(in, name, value, size, flags, perms); + if (ret >= 0 && check_realm) { + // check if snaprealm was created for quota inode + if (in->quota.is_enabled() && + !(in->snaprealm && in->snaprealm->ino == in->ino)) + ret = -CEPHFS_EOPNOTSUPP; + } + + return ret; +} + +int Client::_setxattr(InodeRef &in, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + if (cct->_conf->client_permissions) { + int r = xattr_permission(in.get(), name, MAY_WRITE, perms); + if (r < 0) + return r; + } + return _setxattr(in.get(), name, value, size, flags, perms); +} + +int Client::_setxattr_check_data_pool(string& name, string& value, const OSDMap *osdmap) +{ + string tmp; + if (name == "layout") { + string::iterator begin = value.begin(); + string::iterator end = value.end(); + keys_and_values<string::iterator> p; // create instance of parser + std::map<string, string> m; // map to receive results + if (!qi::parse(begin, end, p, m)) { // returns true if successful + return -CEPHFS_EINVAL; + } + if (begin != end) + return -CEPHFS_EINVAL; + for (map<string,string>::iterator q = m.begin(); q != m.end(); ++q) { + if (q->first == "pool") { + tmp = q->second; + break; + } + } + } else if (name == "layout.pool") { + tmp = value; + } + + if (tmp.length()) { + int64_t pool; + try { + pool = boost::lexical_cast<unsigned>(tmp); + if (!osdmap->have_pg_pool(pool)) + return -CEPHFS_ENOENT; + } catch (boost::bad_lexical_cast const&) { + pool = osdmap->lookup_pg_pool_name(tmp); + if (pool < 0) { + return -CEPHFS_ENOENT; + } + } + } + + return 0; +} + +void Client::_setxattr_maybe_wait_for_osdmap(const char *name, const void *value, size_t size) +{ + // For setting pool of layout, MetaRequest need osdmap epoch. + // There is a race which create a new data pool but client and mds both don't have. + // Make client got the latest osdmap which make mds quickly judge whether get newer osdmap. + ldout(cct, 15) << __func__ << ": name = " << name << dendl; + if (strcmp(name, "ceph.file.layout.pool") == 0 || strcmp(name, "ceph.dir.layout.pool") == 0 || + strcmp(name, "ceph.file.layout") == 0 || strcmp(name, "ceph.dir.layout") == 0) { + string rest(strstr(name, "layout")); + string v((const char*)value, size); + int r = objecter->with_osdmap([&](const OSDMap& o) { + return _setxattr_check_data_pool(rest, v, &o); + }); + + if (r == -CEPHFS_ENOENT) { + bs::error_code ec; + ldout(cct, 20) << __func__ << ": waiting for latest osdmap" << dendl; + objecter->wait_for_latest_osdmap(ca::use_blocked[ec]); + ldout(cct, 20) << __func__ << ": got latest osdmap: " << ec << dendl; + } + } +} + +int Client::ll_setxattr(Inode *in, const char *name, const void *value, + size_t size, int flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + _setxattr_maybe_wait_for_osdmap(name, value, size); + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << __func__ << " " << vino << " " << name << " size " << size << dendl; + tout(cct) << __func__ << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + if (!fuse_default_permissions) { + int r = xattr_permission(in, name, MAY_WRITE, perms); + if (r < 0) + return r; + } + return _setxattr(in, name, value, size, flags, perms); +} + +int Client::_removexattr(Inode *in, const char *name, const UserPerm& perms) +{ + if (in->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + + // same xattrs supported by kernel client + if (strncmp(name, "user.", 5) && + strncmp(name, "system.", 7) && + strncmp(name, "security.", 9) && + strncmp(name, "trusted.", 8) && + strncmp(name, "ceph.", 5)) + return -CEPHFS_EOPNOTSUPP; + + const VXattr *vxattr = _match_vxattr(in, name); + if (vxattr && vxattr->readonly) + return -CEPHFS_EOPNOTSUPP; + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_RMXATTR); + filepath path; + in->make_nosnap_relative_path(path); + req->set_filepath(path); + req->set_filepath2(name); + req->set_inode(in); + + int res = make_request(req, perms); + + trim_cache(); + ldout(cct, 8) << "_removexattr(" << in->ino << ", \"" << name << "\") = " << res << dendl; + return res; +} + +int Client::_removexattr(InodeRef &in, const char *name, const UserPerm& perms) +{ + if (cct->_conf->client_permissions) { + int r = xattr_permission(in.get(), name, MAY_WRITE, perms); + if (r < 0) + return r; + } + return _removexattr(in.get(), name, perms); +} + +int Client::ll_removexattr(Inode *in, const char *name, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_removexattr " << vino << " " << name << dendl; + tout(cct) << "ll_removexattr" << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + if (!fuse_default_permissions) { + int r = xattr_permission(in, name, MAY_WRITE, perms); + if (r < 0) + return r; + } + + return _removexattr(in, name, perms); +} + +bool Client::_vxattrcb_fscrypt_auth_exists(Inode *in) +{ + bool exists = !in->fscrypt_auth.empty(); + + ldout(cct, 10) << "fscrypt_auth exists " << exists << dendl; + return exists; +} + +size_t Client::_vxattrcb_fscrypt_auth(Inode *in, char *val, size_t size) +{ + size_t count = in->fscrypt_auth.size(); + + if (count <= size) + memcpy(val, in->fscrypt_auth.data(), count); + return count; +} + +int Client::_vxattrcb_fscrypt_auth_set(Inode *in, const void *val, size_t size, + const UserPerm& perms) +{ + struct ceph_statx stx = { 0 }; + std::vector<uint8_t> aux; + + aux.resize(size); + memcpy(aux.data(), val, size); + + return _do_setattr(in, &stx, CEPH_SETATTR_FSCRYPT_AUTH, perms, nullptr, &aux); +} + +bool Client::_vxattrcb_fscrypt_file_exists(Inode *in) +{ + return !in->fscrypt_file.empty(); +} + +size_t Client::_vxattrcb_fscrypt_file(Inode *in, char *val, size_t size) +{ + size_t count = in->fscrypt_file.size(); + + if (count <= size) + memcpy(val, in->fscrypt_file.data(), count); + return count; +} + +int Client::_vxattrcb_fscrypt_file_set(Inode *in, const void *val, size_t size, + const UserPerm& perms) +{ + struct ceph_statx stx = { 0 }; + std::vector<uint8_t> aux; + + aux.resize(size); + memcpy(aux.data(), val, size); + + return _do_setattr(in, &stx, CEPH_SETATTR_FSCRYPT_FILE, perms, nullptr, &aux); +} + +bool Client::_vxattrcb_quota_exists(Inode *in) +{ + return in->quota.is_enabled() && + (in->snapid != CEPH_NOSNAP || + (in->snaprealm && in->snaprealm->ino == in->ino)); +} +size_t Client::_vxattrcb_quota(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, + "max_bytes=%lld max_files=%lld", + (long long int)in->quota.max_bytes, + (long long int)in->quota.max_files); +} +size_t Client::_vxattrcb_quota_max_bytes(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%lld", (long long int)in->quota.max_bytes); +} +size_t Client::_vxattrcb_quota_max_files(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%lld", (long long int)in->quota.max_files); +} + +bool Client::_vxattrcb_layout_exists(Inode *in) +{ + return in->layout != file_layout_t(); +} +size_t Client::_vxattrcb_layout(Inode *in, char *val, size_t size) +{ + int r = snprintf(val, size, + "stripe_unit=%llu stripe_count=%llu object_size=%llu pool=", + (unsigned long long)in->layout.stripe_unit, + (unsigned long long)in->layout.stripe_count, + (unsigned long long)in->layout.object_size); + objecter->with_osdmap([&](const OSDMap& o) { + if (o.have_pg_pool(in->layout.pool_id)) + r += snprintf(val + r, size - r, "%s", + o.get_pool_name(in->layout.pool_id).c_str()); + else + r += snprintf(val + r, size - r, "%" PRIu64, + (uint64_t)in->layout.pool_id); + }); + if (in->layout.pool_ns.length()) + r += snprintf(val + r, size - r, " pool_namespace=%s", + in->layout.pool_ns.c_str()); + return r; +} +size_t Client::_vxattrcb_layout_stripe_unit(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->layout.stripe_unit); +} +size_t Client::_vxattrcb_layout_stripe_count(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->layout.stripe_count); +} +size_t Client::_vxattrcb_layout_object_size(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->layout.object_size); +} +size_t Client::_vxattrcb_layout_pool(Inode *in, char *val, size_t size) +{ + size_t r; + objecter->with_osdmap([&](const OSDMap& o) { + if (o.have_pg_pool(in->layout.pool_id)) + r = snprintf(val, size, "%s", o.get_pool_name( + in->layout.pool_id).c_str()); + else + r = snprintf(val, size, "%" PRIu64, (uint64_t)in->layout.pool_id); + }); + return r; +} +size_t Client::_vxattrcb_layout_pool_namespace(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%s", in->layout.pool_ns.c_str()); +} +size_t Client::_vxattrcb_dir_entries(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)(in->dirstat.nfiles + in->dirstat.nsubdirs)); +} +size_t Client::_vxattrcb_dir_files(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->dirstat.nfiles); +} +size_t Client::_vxattrcb_dir_subdirs(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->dirstat.nsubdirs); +} +size_t Client::_vxattrcb_dir_rentries(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)(in->rstat.rfiles + in->rstat.rsubdirs)); +} +size_t Client::_vxattrcb_dir_rfiles(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->rstat.rfiles); +} +size_t Client::_vxattrcb_dir_rsubdirs(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->rstat.rsubdirs); +} +size_t Client::_vxattrcb_dir_rsnaps(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->rstat.rsnaps); +} +size_t Client::_vxattrcb_dir_rbytes(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu", (unsigned long long)in->rstat.rbytes); +} +size_t Client::_vxattrcb_dir_rctime(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%ld.%09ld", (long)in->rstat.rctime.sec(), + (long)in->rstat.rctime.nsec()); +} +bool Client::_vxattrcb_dir_pin_exists(Inode *in) +{ + return in->dir_pin != -CEPHFS_ENODATA; +} +size_t Client::_vxattrcb_dir_pin(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%ld", (long)in->dir_pin); +} + +bool Client::_vxattrcb_snap_btime_exists(Inode *in) +{ + return !in->snap_btime.is_zero(); +} + +size_t Client::_vxattrcb_snap_btime(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%llu.%09lu", + (long long unsigned)in->snap_btime.sec(), + (long unsigned)in->snap_btime.nsec()); +} + +size_t Client::_vxattrcb_caps(Inode *in, char *val, size_t size) +{ + int issued; + + in->caps_issued(&issued); + return snprintf(val, size, "%s/0x%x", ccap_string(issued).c_str(), issued); +} + +bool Client::_vxattrcb_mirror_info_exists(Inode *in) +{ + // checking one of the xattrs would suffice + return in->xattrs.count("ceph.mirror.info.cluster_id") != 0; +} + +size_t Client::_vxattrcb_mirror_info(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "cluster_id=%.*s fs_id=%.*s", + in->xattrs["ceph.mirror.info.cluster_id"].length(), + in->xattrs["ceph.mirror.info.cluster_id"].c_str(), + in->xattrs["ceph.mirror.info.fs_id"].length(), + in->xattrs["ceph.mirror.info.fs_id"].c_str()); +} + +size_t Client::_vxattrcb_cluster_fsid(Inode *in, char *val, size_t size) +{ + return snprintf(val, size, "%s", monclient->get_fsid().to_string().c_str()); +} + +size_t Client::_vxattrcb_client_id(Inode *in, char *val, size_t size) +{ + auto name = messenger->get_myname(); + return snprintf(val, size, "%s%" PRId64, name.type_str(), name.num()); +} + +#define CEPH_XATTR_NAME(_type, _name) "ceph." #_type "." #_name +#define CEPH_XATTR_NAME2(_type, _name, _name2) "ceph." #_type "." #_name "." #_name2 + +#define XATTR_NAME_CEPH(_type, _name, _flags) \ +{ \ + name: CEPH_XATTR_NAME(_type, _name), \ + getxattr_cb: &Client::_vxattrcb_ ## _type ## _ ## _name, \ + readonly: true, \ + exists_cb: NULL, \ + flags: _flags, \ +} +#define XATTR_LAYOUT_FIELD(_type, _name, _field) \ +{ \ + name: CEPH_XATTR_NAME2(_type, _name, _field), \ + getxattr_cb: &Client::_vxattrcb_ ## _name ## _ ## _field, \ + readonly: false, \ + exists_cb: &Client::_vxattrcb_layout_exists, \ + flags: 0, \ +} +#define XATTR_QUOTA_FIELD(_type, _name) \ +{ \ + name: CEPH_XATTR_NAME(_type, _name), \ + getxattr_cb: &Client::_vxattrcb_ ## _type ## _ ## _name, \ + readonly: false, \ + exists_cb: &Client::_vxattrcb_quota_exists, \ + flags: 0, \ +} + +const Client::VXattr Client::_dir_vxattrs[] = { + { + name: "ceph.dir.layout", + getxattr_cb: &Client::_vxattrcb_layout, + readonly: false, + exists_cb: &Client::_vxattrcb_layout_exists, + flags: 0, + }, + // FIXME + // Delete the following dir layout field definitions for release "S" + XATTR_LAYOUT_FIELD(dir, layout, stripe_unit), + XATTR_LAYOUT_FIELD(dir, layout, stripe_count), + XATTR_LAYOUT_FIELD(dir, layout, object_size), + XATTR_LAYOUT_FIELD(dir, layout, pool), + XATTR_LAYOUT_FIELD(dir, layout, pool_namespace), + XATTR_NAME_CEPH(dir, entries, VXATTR_DIRSTAT), + XATTR_NAME_CEPH(dir, files, VXATTR_DIRSTAT), + XATTR_NAME_CEPH(dir, subdirs, VXATTR_DIRSTAT), + XATTR_NAME_CEPH(dir, rentries, VXATTR_RSTAT), + XATTR_NAME_CEPH(dir, rfiles, VXATTR_RSTAT), + XATTR_NAME_CEPH(dir, rsubdirs, VXATTR_RSTAT), + XATTR_NAME_CEPH(dir, rsnaps, VXATTR_RSTAT), + XATTR_NAME_CEPH(dir, rbytes, VXATTR_RSTAT), + XATTR_NAME_CEPH(dir, rctime, VXATTR_RSTAT), + { + name: "ceph.quota", + getxattr_cb: &Client::_vxattrcb_quota, + readonly: false, + exists_cb: &Client::_vxattrcb_quota_exists, + flags: 0, + }, + XATTR_QUOTA_FIELD(quota, max_bytes), + XATTR_QUOTA_FIELD(quota, max_files), + // FIXME + // Delete the following dir pin field definitions for release "S" + { + name: "ceph.dir.pin", + getxattr_cb: &Client::_vxattrcb_dir_pin, + readonly: false, + exists_cb: &Client::_vxattrcb_dir_pin_exists, + flags: 0, + }, + { + name: "ceph.snap.btime", + getxattr_cb: &Client::_vxattrcb_snap_btime, + readonly: true, + exists_cb: &Client::_vxattrcb_snap_btime_exists, + flags: 0, + }, + { + name: "ceph.mirror.info", + getxattr_cb: &Client::_vxattrcb_mirror_info, + readonly: false, + exists_cb: &Client::_vxattrcb_mirror_info_exists, + flags: 0, + }, + { + name: "ceph.caps", + getxattr_cb: &Client::_vxattrcb_caps, + readonly: true, + exists_cb: NULL, + flags: 0, + }, + { name: "" } /* Required table terminator */ +}; + +const Client::VXattr Client::_file_vxattrs[] = { + { + name: "ceph.file.layout", + getxattr_cb: &Client::_vxattrcb_layout, + readonly: false, + exists_cb: &Client::_vxattrcb_layout_exists, + flags: 0, + }, + XATTR_LAYOUT_FIELD(file, layout, stripe_unit), + XATTR_LAYOUT_FIELD(file, layout, stripe_count), + XATTR_LAYOUT_FIELD(file, layout, object_size), + XATTR_LAYOUT_FIELD(file, layout, pool), + XATTR_LAYOUT_FIELD(file, layout, pool_namespace), + { + name: "ceph.snap.btime", + getxattr_cb: &Client::_vxattrcb_snap_btime, + readonly: true, + exists_cb: &Client::_vxattrcb_snap_btime_exists, + flags: 0, + }, + { + name: "ceph.caps", + getxattr_cb: &Client::_vxattrcb_caps, + readonly: true, + exists_cb: NULL, + flags: 0, + }, + { name: "" } /* Required table terminator */ +}; + +const Client::VXattr Client::_common_vxattrs[] = { + { + name: "ceph.cluster_fsid", + getxattr_cb: &Client::_vxattrcb_cluster_fsid, + readonly: true, + exists_cb: nullptr, + flags: 0, + }, + { + name: "ceph.client_id", + getxattr_cb: &Client::_vxattrcb_client_id, + readonly: true, + exists_cb: nullptr, + flags: 0, + }, + { + name: "ceph.fscrypt.auth", + getxattr_cb: &Client::_vxattrcb_fscrypt_auth, + setxattr_cb: &Client::_vxattrcb_fscrypt_auth_set, + readonly: false, + exists_cb: &Client::_vxattrcb_fscrypt_auth_exists, + flags: 0, + }, + { + name: "ceph.fscrypt.file", + getxattr_cb: &Client::_vxattrcb_fscrypt_file, + setxattr_cb: &Client::_vxattrcb_fscrypt_file_set, + readonly: false, + exists_cb: &Client::_vxattrcb_fscrypt_file_exists, + flags: 0, + }, + { name: "" } /* Required table terminator */ +}; + +const Client::VXattr *Client::_get_vxattrs(Inode *in) +{ + if (in->is_dir()) + return _dir_vxattrs; + else if (in->is_file()) + return _file_vxattrs; + return NULL; +} + +const Client::VXattr *Client::_match_vxattr(Inode *in, const char *name) +{ + if (strncmp(name, "ceph.", 5) == 0) { + const VXattr *vxattr = _get_vxattrs(in); + if (vxattr) { + while (!vxattr->name.empty()) { + if (vxattr->name == name) + return vxattr; + vxattr++; + } + } + + // for common vxattrs + vxattr = _common_vxattrs; + while (!vxattr->name.empty()) { + if (vxattr->name == name) + return vxattr; + vxattr++; + } + } + + return NULL; +} + +int Client::ll_readlink(Inode *in, char *buf, size_t buflen, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_readlink " << vino << dendl; + tout(cct) << "ll_readlink" << std::endl; + tout(cct) << vino.ino.val << std::endl; + + std::scoped_lock lock(client_lock); + for (auto dn : in->dentries) { + touch_dn(dn); + } + + int r = _readlink(in, buf, buflen); // FIXME: no permission checking! + ldout(cct, 3) << "ll_readlink " << vino << " = " << r << dendl; + return r; +} + +int Client::_mknod(Inode *dir, const char *name, mode_t mode, dev_t rdev, + const UserPerm& perms, InodeRef *inp) +{ + ldout(cct, 8) << "_mknod(" << dir->ino << " " << name << ", 0" << oct + << mode << dec << ", " << rdev << ", uid " << perms.uid() + << ", gid " << perms.gid() << ")" << dendl; + + if (strlen(name) > NAME_MAX) + return -CEPHFS_ENAMETOOLONG; + + if (dir->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + if (is_quota_files_exceeded(dir, perms)) { + return -CEPHFS_EDQUOT; + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_MKNOD); + + req->set_inode_owner_uid_gid(perms.uid(), perms.gid()); + + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_inode(dir); + req->head.args.mknod.rdev = rdev; + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + + bufferlist xattrs_bl; + int res = _posix_acl_create(dir, &mode, xattrs_bl, perms); + if (res < 0) { + put_request(req); + return res; + } + req->head.args.mknod.mode = mode; + if (xattrs_bl.length() > 0) + req->set_data(xattrs_bl); + + Dentry *de = get_or_create(dir, name); + req->set_dentry(de); + + res = make_request(req, perms, inp); + + trim_cache(); + + ldout(cct, 8) << "mknod(" << path << ", 0" << oct << mode << dec << ") = " << res << dendl; + return res; +} + +int Client::ll_mknod(Inode *parent, const char *name, mode_t mode, + dev_t rdev, struct stat *attr, Inode **out, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_mknod " << vparent << " " << name << dendl; + tout(cct) << "ll_mknod" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << mode << std::endl; + tout(cct) << rdev << std::endl; + + std::scoped_lock lock(client_lock); + if (!fuse_default_permissions) { + int r = may_create(parent, perms); + if (r < 0) + return r; + } + + InodeRef in; + int r = _mknod(parent, name, mode, rdev, perms, &in); + if (r == 0) { + fill_stat(in, attr); + _ll_get(in.get()); + } + tout(cct) << attr->st_ino << std::endl; + ldout(cct, 3) << "ll_mknod " << vparent << " " << name + << " = " << r << " (" << hex << attr->st_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::ll_mknodx(Inode *parent, const char *name, mode_t mode, + dev_t rdev, Inode **out, + struct ceph_statx *stx, unsigned want, unsigned flags, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + unsigned caps = statx_to_mask(flags, want); + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_mknodx " << vparent << " " << name << dendl; + tout(cct) << "ll_mknodx" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << mode << std::endl; + tout(cct) << rdev << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_create(parent, perms); + if (r < 0) + return r; + } + + InodeRef in; + int r = _mknod(parent, name, mode, rdev, perms, &in); + if (r == 0) { + fill_statx(in, caps, stx); + _ll_get(in.get()); + } + tout(cct) << stx->stx_ino << std::endl; + ldout(cct, 3) << "ll_mknodx " << vparent << " " << name + << " = " << r << " (" << hex << stx->stx_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::_create(Inode *dir, const char *name, int flags, mode_t mode, + InodeRef *inp, Fh **fhp, int stripe_unit, int stripe_count, + int object_size, const char *data_pool, bool *created, + const UserPerm& perms, std::string alternate_name) +{ + ldout(cct, 8) << "_create(" << dir->ino << " " << name << ", 0" << oct << + mode << dec << ")" << dendl; + + if (strlen(name) > NAME_MAX) + return -CEPHFS_ENAMETOOLONG; + if (dir->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + if (is_quota_files_exceeded(dir, perms)) { + return -CEPHFS_EDQUOT; + } + + // use normalized flags to generate cmode + int cflags = ceph_flags_sys2wire(flags); + if (cct->_conf.get_val<bool>("client_force_lazyio")) + cflags |= CEPH_O_LAZY; + + int cmode = ceph_flags_to_mode(cflags); + + int64_t pool_id = -1; + if (data_pool && *data_pool) { + pool_id = objecter->with_osdmap( + std::mem_fn(&OSDMap::lookup_pg_pool_name), data_pool); + if (pool_id < 0) + return -CEPHFS_EINVAL; + if (pool_id > 0xffffffffll) + return -CEPHFS_ERANGE; // bummer! + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_CREATE); + + req->set_inode_owner_uid_gid(perms.uid(), perms.gid()); + + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_alternate_name(std::move(alternate_name)); + req->set_inode(dir); + req->head.args.open.flags = cflags | CEPH_O_CREAT; + + req->head.args.open.stripe_unit = stripe_unit; + req->head.args.open.stripe_count = stripe_count; + req->head.args.open.object_size = object_size; + if (cct->_conf->client_debug_getattr_caps) + req->head.args.open.mask = DEBUG_GETATTR_CAPS; + else + req->head.args.open.mask = 0; + req->head.args.open.pool = pool_id; + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + + mode |= S_IFREG; + bufferlist xattrs_bl; + int res = _posix_acl_create(dir, &mode, xattrs_bl, perms); + if (res < 0) { + put_request(req); + return res; + } + req->head.args.open.mode = mode; + if (xattrs_bl.length() > 0) + req->set_data(xattrs_bl); + + Dentry *de = get_or_create(dir, name); + req->set_dentry(de); + + res = make_request(req, perms, inp, created); + if (res < 0) { + goto reply_error; + } + + /* If the caller passed a value in fhp, do the open */ + if(fhp) { + (*inp)->get_open_ref(cmode); + *fhp = _create_fh(inp->get(), flags, cmode, perms); + } + + reply_error: + trim_cache(); + + ldout(cct, 8) << "create(" << path << ", 0" << oct << mode << dec + << " layout " << stripe_unit + << ' ' << stripe_count + << ' ' << object_size + <<") = " << res << dendl; + return res; +} + +int Client::_mkdir(Inode *dir, const char *name, mode_t mode, const UserPerm& perm, + InodeRef *inp, const std::map<std::string, std::string> &metadata, + std::string alternate_name) +{ + ldout(cct, 8) << "_mkdir(" << dir->ino << " " << name << ", 0" << oct + << mode << dec << ", uid " << perm.uid() + << ", gid " << perm.gid() << ")" << dendl; + + if (strlen(name) > NAME_MAX) + return -CEPHFS_ENAMETOOLONG; + + if (dir->snapid != CEPH_NOSNAP && dir->snapid != CEPH_SNAPDIR) { + return -CEPHFS_EROFS; + } + if (is_quota_files_exceeded(dir, perm)) { + return -CEPHFS_EDQUOT; + } + + bool is_snap_op = dir->snapid == CEPH_SNAPDIR; + MetaRequest *req = new MetaRequest(is_snap_op ? + CEPH_MDS_OP_MKSNAP : CEPH_MDS_OP_MKDIR); + + if (!is_snap_op) + req->set_inode_owner_uid_gid(perm.uid(), perm.gid()); + + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_inode(dir); + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + req->set_alternate_name(std::move(alternate_name)); + + mode |= S_IFDIR; + bufferlist bl; + int res = _posix_acl_create(dir, &mode, bl, perm); + if (res < 0) { + put_request(req); + return res; + } + req->head.args.mkdir.mode = mode; + if (is_snap_op) { + SnapPayload payload; + // clear the bufferlist that may have been populated by the call + // to _posix_acl_create(). MDS mksnap does not make use of it. + // So, reuse it to pass metadata payload. + bl.clear(); + payload.metadata = metadata; + encode(payload, bl); + } + if (bl.length() > 0) { + req->set_data(bl); + } + + Dentry *de = get_or_create(dir, name); + req->set_dentry(de); + + ldout(cct, 10) << "_mkdir: making request" << dendl; + res = make_request(req, perm, inp); + ldout(cct, 10) << "_mkdir result is " << res << dendl; + + trim_cache(); + + ldout(cct, 8) << "_mkdir(" << path << ", 0" << oct << mode << dec << ") = " << res << dendl; + return res; +} + +int Client::ll_mkdir(Inode *parent, const char *name, mode_t mode, + struct stat *attr, Inode **out, const UserPerm& perm) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_mkdir " << vparent << " " << name << dendl; + tout(cct) << "ll_mkdir" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << mode << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_create(parent, perm); + if (r < 0) + return r; + } + + InodeRef in; + int r = _mkdir(parent, name, mode, perm, &in); + if (r == 0) { + fill_stat(in, attr); + _ll_get(in.get()); + } + tout(cct) << attr->st_ino << std::endl; + ldout(cct, 3) << "ll_mkdir " << vparent << " " << name + << " = " << r << " (" << hex << attr->st_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::ll_mkdirx(Inode *parent, const char *name, mode_t mode, Inode **out, + struct ceph_statx *stx, unsigned want, unsigned flags, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_mkdirx " << vparent << " " << name << dendl; + tout(cct) << "ll_mkdirx" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << mode << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_create(parent, perms); + if (r < 0) + return r; + } + + InodeRef in; + int r = _mkdir(parent, name, mode, perms, &in); + if (r == 0) { + fill_statx(in, statx_to_mask(flags, want), stx); + _ll_get(in.get()); + } else { + stx->stx_ino = 0; + stx->stx_mask = 0; + } + tout(cct) << stx->stx_ino << std::endl; + ldout(cct, 3) << "ll_mkdirx " << vparent << " " << name + << " = " << r << " (" << hex << stx->stx_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::_symlink(Inode *dir, const char *name, const char *target, + const UserPerm& perms, std::string alternate_name, InodeRef *inp) +{ + ldout(cct, 8) << "_symlink(" << dir->ino << " " << name << ", " << target + << ", uid " << perms.uid() << ", gid " << perms.gid() << ")" + << dendl; + + if (strlen(name) > NAME_MAX) + return -CEPHFS_ENAMETOOLONG; + + if (dir->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + if (is_quota_files_exceeded(dir, perms)) { + return -CEPHFS_EDQUOT; + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_SYMLINK); + + req->set_inode_owner_uid_gid(perms.uid(), perms.gid()); + + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_alternate_name(std::move(alternate_name)); + req->set_inode(dir); + req->set_string2(target); + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + + Dentry *de = get_or_create(dir, name); + req->set_dentry(de); + + int res = make_request(req, perms, inp); + + trim_cache(); + ldout(cct, 8) << "_symlink(\"" << path << "\", \"" << target << "\") = " << + res << dendl; + return res; +} + +int Client::ll_symlink(Inode *parent, const char *name, const char *value, + struct stat *attr, Inode **out, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_symlink " << vparent << " " << name << " -> " << value + << dendl; + tout(cct) << "ll_symlink" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << value << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_create(parent, perms); + if (r < 0) + return r; + } + + InodeRef in; + int r = _symlink(parent, name, value, perms, "", &in); + if (r == 0) { + fill_stat(in, attr); + _ll_get(in.get()); + } + tout(cct) << attr->st_ino << std::endl; + ldout(cct, 3) << "ll_symlink " << vparent << " " << name + << " = " << r << " (" << hex << attr->st_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::ll_symlinkx(Inode *parent, const char *name, const char *value, + Inode **out, struct ceph_statx *stx, unsigned want, + unsigned flags, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 3) << "ll_symlinkx " << vparent << " " << name << " -> " << value + << dendl; + tout(cct) << "ll_symlinkx" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << value << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_create(parent, perms); + if (r < 0) + return r; + } + + InodeRef in; + int r = _symlink(parent, name, value, perms, "", &in); + if (r == 0) { + fill_statx(in, statx_to_mask(flags, want), stx); + _ll_get(in.get()); + } + tout(cct) << stx->stx_ino << std::endl; + ldout(cct, 3) << "ll_symlinkx " << vparent << " " << name + << " = " << r << " (" << hex << stx->stx_ino << dec << ")" << dendl; + *out = in.get(); + return r; +} + +int Client::_unlink(Inode *dir, const char *name, const UserPerm& perm) +{ + ldout(cct, 8) << "_unlink(" << dir->ino << " " << name + << " uid " << perm.uid() << " gid " << perm.gid() + << ")" << dendl; + + if (dir->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_UNLINK); + + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + + InodeRef otherin; + Inode *in; + Dentry *de = get_or_create(dir, name); + req->set_dentry(de); + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + + int res = _lookup(dir, name, 0, &otherin, perm); + if (res < 0) { + put_request(req); + return res; + } + + in = otherin.get(); + req->set_other_inode(in); + in->break_all_delegs(); + req->other_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; + + req->set_inode(dir); + + res = make_request(req, perm); + + trim_cache(); + ldout(cct, 8) << "unlink(" << path << ") = " << res << dendl; + return res; +} + +int Client::ll_unlink(Inode *in, const char *name, const UserPerm& perm) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_unlink " << vino << " " << name << dendl; + tout(cct) << "ll_unlink" << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_delete(in, name, perm); + if (r < 0) + return r; + } + return _unlink(in, name, perm); +} + +int Client::_rmdir(Inode *dir, const char *name, const UserPerm& perms) +{ + ldout(cct, 8) << "_rmdir(" << dir->ino << " " << name << " uid " + << perms.uid() << " gid " << perms.gid() << ")" << dendl; + + if (dir->snapid != CEPH_NOSNAP && dir->snapid != CEPH_SNAPDIR) { + return -CEPHFS_EROFS; + } + + int op = dir->snapid == CEPH_SNAPDIR ? CEPH_MDS_OP_RMSNAP : CEPH_MDS_OP_RMDIR; + MetaRequest *req = new MetaRequest(op); + filepath path; + dir->make_nosnap_relative_path(path); + path.push_dentry(name); + req->set_filepath(path); + req->set_inode(dir); + + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + req->other_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; + + InodeRef in; + + Dentry *de = get_or_create(dir, name); + if (op == CEPH_MDS_OP_RMDIR) + req->set_dentry(de); + else + de->get(); + + int res = _lookup(dir, name, 0, &in, perms); + if (res < 0) { + put_request(req); + return res; + } + + if (op == CEPH_MDS_OP_RMSNAP) { + unlink(de, true, true); + de->put(); + } + req->set_other_inode(in.get()); + + res = make_request(req, perms); + + trim_cache(); + ldout(cct, 8) << "rmdir(" << path << ") = " << res << dendl; + return res; +} + +int Client::ll_rmdir(Inode *in, const char *name, const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_rmdir " << vino << " " << name << dendl; + tout(cct) << "ll_rmdir" << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << name << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_delete(in, name, perms); + if (r < 0) + return r; + } + + return _rmdir(in, name, perms); +} + +int Client::_rename(Inode *fromdir, const char *fromname, Inode *todir, const char *toname, const UserPerm& perm, std::string alternate_name) +{ + ldout(cct, 8) << "_rename(" << fromdir->ino << " " << fromname << " to " + << todir->ino << " " << toname + << " uid " << perm.uid() << " gid " << perm.gid() << ")" + << dendl; + + if (fromdir->snapid != todir->snapid) + return -CEPHFS_EXDEV; + + int op = CEPH_MDS_OP_RENAME; + if (fromdir->snapid != CEPH_NOSNAP) { + if (fromdir == todir && fromdir->snapid == CEPH_SNAPDIR) + op = CEPH_MDS_OP_RENAMESNAP; + else + return -CEPHFS_EROFS; + } + + // don't allow cross-quota renames + if (cct->_conf.get_val<bool>("client_quota") && fromdir != todir) { + Inode *fromdir_root = + fromdir->quota.is_enabled() ? fromdir : get_quota_root(fromdir, perm); + Inode *todir_root = + todir->quota.is_enabled() ? todir : get_quota_root(todir, perm); + if (fromdir_root != todir_root) { + return -CEPHFS_EXDEV; + } + } + + InodeRef target; + MetaRequest *req = new MetaRequest(op); + + filepath from; + fromdir->make_nosnap_relative_path(from); + from.push_dentry(fromname); + filepath to; + todir->make_nosnap_relative_path(to); + to.push_dentry(toname); + req->set_filepath(to); + req->set_filepath2(from); + req->set_alternate_name(std::move(alternate_name)); + + Dentry *oldde = get_or_create(fromdir, fromname); + Dentry *de = get_or_create(todir, toname); + + int res; + if (op == CEPH_MDS_OP_RENAME) { + req->set_old_dentry(oldde); + req->old_dentry_drop = CEPH_CAP_FILE_SHARED; + req->old_dentry_unless = CEPH_CAP_FILE_EXCL; + + de->is_renaming = true; + req->set_dentry(de); + req->dentry_drop = CEPH_CAP_FILE_SHARED; + req->dentry_unless = CEPH_CAP_FILE_EXCL; + + InodeRef oldin, otherin; + res = _lookup(fromdir, fromname, 0, &oldin, perm, nullptr, true); + if (res < 0) + goto fail; + + Inode *oldinode = oldin.get(); + oldinode->break_all_delegs(); + req->set_old_inode(oldinode); + req->old_inode_drop = CEPH_CAP_LINK_SHARED; + + res = _lookup(todir, toname, 0, &otherin, perm, nullptr, true); + switch (res) { + case 0: + { + Inode *in = otherin.get(); + req->set_other_inode(in); + in->break_all_delegs(); + } + req->other_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; + break; + case -CEPHFS_ENOENT: + break; + default: + goto fail; + } + + req->set_inode(todir); + } else { + // renamesnap reply contains no tracedn, so we need to invalidate + // dentry manually + unlink(oldde, true, true); + unlink(de, true, true); + + req->set_inode(todir); + } + + res = make_request(req, perm, &target); + ldout(cct, 10) << "rename result is " << res << dendl; + + // if rename fails it will miss waking up the waiters + if (op == CEPH_MDS_OP_RENAME && de->is_renaming) { + de->is_renaming = false; + signal_cond_list(waiting_for_rename); + } + + // renamed item from our cache + + trim_cache(); + ldout(cct, 8) << "_rename(" << from << ", " << to << ") = " << res << dendl; + return res; + + fail: + put_request(req); + return res; +} + +int Client::ll_rename(Inode *parent, const char *name, Inode *newparent, + const char *newname, const UserPerm& perm) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vparent = _get_vino(parent); + vinodeno_t vnewparent = _get_vino(newparent); + + ldout(cct, 3) << "ll_rename " << vparent << " " << name << " to " + << vnewparent << " " << newname << dendl; + tout(cct) << "ll_rename" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << vnewparent.ino.val << std::endl; + tout(cct) << newname << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_delete(parent, name, perm); + if (r < 0) + return r; + r = may_delete(newparent, newname, perm); + if (r < 0 && r != -CEPHFS_ENOENT) + return r; + } + + return _rename(parent, name, newparent, newname, perm, ""); +} + +int Client::_link(Inode *in, Inode *dir, const char *newname, const UserPerm& perm, std::string alternate_name, InodeRef *inp) +{ + ldout(cct, 8) << "_link(" << in->ino << " to " << dir->ino << " " << newname + << " uid " << perm.uid() << " gid " << perm.gid() << ")" << dendl; + + if (strlen(newname) > NAME_MAX) + return -CEPHFS_ENAMETOOLONG; + + if (in->snapid != CEPH_NOSNAP || dir->snapid != CEPH_NOSNAP) { + return -CEPHFS_EROFS; + } + if (is_quota_files_exceeded(dir, perm)) { + return -CEPHFS_EDQUOT; + } + + in->break_all_delegs(); + MetaRequest *req = new MetaRequest(CEPH_MDS_OP_LINK); + + filepath path(newname, dir->ino); + req->set_filepath(path); + req->set_alternate_name(std::move(alternate_name)); + filepath existing(in->ino); + req->set_filepath2(existing); + + req->set_inode(dir); + req->inode_drop = CEPH_CAP_FILE_SHARED; + req->inode_unless = CEPH_CAP_FILE_EXCL; + + Dentry *de = get_or_create(dir, newname); + req->set_dentry(de); + + int res = make_request(req, perm, inp); + ldout(cct, 10) << "link result is " << res << dendl; + + trim_cache(); + ldout(cct, 8) << "link(" << existing << ", " << path << ") = " << res << dendl; + return res; +} + +int Client::ll_link(Inode *in, Inode *newparent, const char *newname, + const UserPerm& perm) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + vinodeno_t vnewparent = _get_vino(newparent); + + ldout(cct, 3) << "ll_link " << vino << " to " << vnewparent << " " << + newname << dendl; + tout(cct) << "ll_link" << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << vnewparent << std::endl; + tout(cct) << newname << std::endl; + + InodeRef target; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + if (S_ISDIR(in->mode)) + return -CEPHFS_EPERM; + + int r = may_hardlink(in, perm); + if (r < 0) + return r; + + r = may_create(newparent, perm); + if (r < 0) + return r; + } + + return _link(in, newparent, newname, perm, "", &target); +} + +int Client::ll_num_osds(void) +{ + std::scoped_lock lock(client_lock); + return objecter->with_osdmap(std::mem_fn(&OSDMap::get_num_osds)); +} + +int Client::ll_osdaddr(int osd, uint32_t *addr) +{ + std::scoped_lock lock(client_lock); + + entity_addr_t g; + bool exists = objecter->with_osdmap([&](const OSDMap& o) { + if (!o.exists(osd)) + return false; + g = o.get_addrs(osd).front(); + return true; + }); + if (!exists) + return -1; + uint32_t nb_addr = (g.in4_addr()).sin_addr.s_addr; + *addr = ntohl(nb_addr); + return 0; +} + +uint32_t Client::ll_stripe_unit(Inode *in) +{ + std::scoped_lock lock(client_lock); + return in->layout.stripe_unit; +} + +uint64_t Client::ll_snap_seq(Inode *in) +{ + std::scoped_lock lock(client_lock); + return in->snaprealm->seq; +} + +int Client::ll_file_layout(Inode *in, file_layout_t *layout) +{ + std::scoped_lock lock(client_lock); + *layout = in->layout; + return 0; +} + +int Client::ll_file_layout(Fh *fh, file_layout_t *layout) +{ + return ll_file_layout(fh->inode.get(), layout); +} + +/* Currently we cannot take advantage of redundancy in reads, since we + would have to go through all possible placement groups (a + potentially quite large number determined by a hash), and use CRUSH + to calculate the appropriate set of OSDs for each placement group, + then index into that. An array with one entry per OSD is much more + tractable and works for demonstration purposes. */ + +int Client::ll_get_stripe_osd(Inode *in, uint64_t blockno, + file_layout_t* layout) +{ + std::scoped_lock lock(client_lock); + + inodeno_t ino = in->ino; + uint32_t object_size = layout->object_size; + uint32_t su = layout->stripe_unit; + uint32_t stripe_count = layout->stripe_count; + uint64_t stripes_per_object = object_size / su; + uint64_t stripeno = 0, stripepos = 0; + + if(stripe_count) { + stripeno = blockno / stripe_count; // which horizontal stripe (Y) + stripepos = blockno % stripe_count; // which object in the object set (X) + } + uint64_t objectsetno = stripeno / stripes_per_object; // which object set + uint64_t objectno = objectsetno * stripe_count + stripepos; // object id + + object_t oid = file_object_t(ino, objectno); + return objecter->with_osdmap([&](const OSDMap& o) { + ceph_object_layout olayout = + o.file_to_object_layout(oid, *layout); + pg_t pg = (pg_t)olayout.ol_pgid; + vector<int> osds; + int primary; + o.pg_to_acting_osds(pg, &osds, &primary); + return primary; + }); +} + +/* Return the offset of the block, internal to the object */ + +uint64_t Client::ll_get_internal_offset(Inode *in, uint64_t blockno) +{ + std::scoped_lock lock(client_lock); + file_layout_t *layout=&(in->layout); + uint32_t object_size = layout->object_size; + uint32_t su = layout->stripe_unit; + uint64_t stripes_per_object = object_size / su; + + return (blockno % stripes_per_object) * su; +} + +int Client::ll_opendir(Inode *in, int flags, dir_result_t** dirpp, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_opendir " << vino << dendl; + tout(cct) << "ll_opendir" << std::endl; + tout(cct) << vino.ino.val << std::endl; + + std::scoped_lock lock(client_lock); + + if (!fuse_default_permissions) { + int r = may_open(in, flags, perms); + if (r < 0) + return r; + } + + int r = _opendir(in, dirpp, perms); + tout(cct) << (uintptr_t)*dirpp << std::endl; + + ldout(cct, 3) << "ll_opendir " << vino << " = " << r << " (" << *dirpp << ")" + << dendl; + return r; +} + +int Client::ll_releasedir(dir_result_t *dirp) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_releasedir " << dirp << dendl; + tout(cct) << "ll_releasedir" << std::endl; + tout(cct) << (uintptr_t)dirp << std::endl; + + std::scoped_lock lock(client_lock); + + _closedir(dirp); + return 0; +} + +int Client::ll_fsyncdir(dir_result_t *dirp) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_fsyncdir " << dirp << dendl; + tout(cct) << "ll_fsyncdir" << std::endl; + tout(cct) << (uintptr_t)dirp << std::endl; + + std::scoped_lock lock(client_lock); + return _fsync(dirp->inode.get(), false); +} + +int Client::ll_open(Inode *in, int flags, Fh **fhp, const UserPerm& perms) +{ + ceph_assert(!(flags & O_CREAT)); + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + + ldout(cct, 3) << "ll_open " << vino << " " << ceph_flags_sys2wire(flags) << dendl; + tout(cct) << "ll_open" << std::endl; + tout(cct) << vino.ino.val << std::endl; + tout(cct) << ceph_flags_sys2wire(flags) << std::endl; + + std::scoped_lock lock(client_lock); + + int r; + if (!fuse_default_permissions) { + r = may_open(in, flags, perms); + if (r < 0) + goto out; + } + + r = _open(in, flags, 0, fhp /* may be NULL */, perms); + + out: + Fh *fhptr = fhp ? *fhp : NULL; + if (fhptr) { + ll_unclosed_fh_set.insert(fhptr); + } + tout(cct) << (uintptr_t)fhptr << std::endl; + ldout(cct, 3) << "ll_open " << vino << " " << ceph_flags_sys2wire(flags) << + " = " << r << " (" << fhptr << ")" << dendl; + return r; +} + +int Client::_ll_create(Inode *parent, const char *name, mode_t mode, + int flags, InodeRef *in, int caps, Fh **fhp, + const UserPerm& perms) +{ + *fhp = NULL; + + vinodeno_t vparent = _get_vino(parent); + + ldout(cct, 8) << "_ll_create " << vparent << " " << name << " 0" << oct << + mode << dec << " " << ceph_flags_sys2wire(flags) << ", uid " << perms.uid() + << ", gid " << perms.gid() << dendl; + tout(cct) << "ll_create" << std::endl; + tout(cct) << vparent.ino.val << std::endl; + tout(cct) << name << std::endl; + tout(cct) << mode << std::endl; + tout(cct) << ceph_flags_sys2wire(flags) << std::endl; + + bool created = false; + int r = _lookup(parent, name, caps, in, perms); + + if (r == 0 && (flags & O_CREAT) && (flags & O_EXCL)) + return -CEPHFS_EEXIST; + + if (r == -CEPHFS_ENOENT && (flags & O_CREAT)) { + if (!fuse_default_permissions) { + r = may_create(parent, perms); + if (r < 0) + goto out; + } + r = _create(parent, name, flags, mode, in, fhp, 0, 0, 0, NULL, &created, + perms, ""); + if (r < 0) + goto out; + } + + if (r < 0) + goto out; + + ceph_assert(*in); + + ldout(cct, 20) << "_ll_create created = " << created << dendl; + if (!created) { + if (!fuse_default_permissions) { + r = may_open(in->get(), flags, perms); + if (r < 0) { + if (*fhp) { + int release_r = _release_fh(*fhp); + ceph_assert(release_r == 0); // during create, no async data ops should have happened + } + goto out; + } + } + if (*fhp == NULL) { + r = _open(in->get(), flags, mode, fhp, perms); + if (r < 0) + goto out; + } + } + +out: + if (*fhp) { + ll_unclosed_fh_set.insert(*fhp); + } + + #ifdef _WIN32 + uint64_t ino = 0; + #else + ino_t ino = 0; + #endif + if (r >= 0) { + Inode *inode = in->get(); + if (use_faked_inos()) + ino = inode->faked_ino; + else + ino = inode->ino; + } + + tout(cct) << (uintptr_t)*fhp << std::endl; + tout(cct) << ino << std::endl; + ldout(cct, 8) << "_ll_create " << vparent << " " << name << " 0" << oct << + mode << dec << " " << ceph_flags_sys2wire(flags) << " = " << r << " (" << + *fhp << " " << hex << ino << dec << ")" << dendl; + + return r; +} + +int Client::ll_create(Inode *parent, const char *name, mode_t mode, + int flags, struct stat *attr, Inode **outp, Fh **fhp, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + InodeRef in; + + int r = _ll_create(parent, name, mode, flags, &in, CEPH_STAT_CAP_INODE_ALL, + fhp, perms); + if (r >= 0) { + ceph_assert(in); + + // passing an Inode in outp requires an additional ref + if (outp) { + _ll_get(in.get()); + *outp = in.get(); + } + fill_stat(in, attr); + } else { + attr->st_ino = 0; + } + + return r; +} + +int Client::ll_createx(Inode *parent, const char *name, mode_t mode, + int oflags, Inode **outp, Fh **fhp, + struct ceph_statx *stx, unsigned want, unsigned lflags, + const UserPerm& perms) +{ + unsigned caps = statx_to_mask(lflags, want); + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + InodeRef in; + + int r = _ll_create(parent, name, mode, oflags, &in, caps, fhp, perms); + if (r >= 0) { + ceph_assert(in); + + // passing an Inode in outp requires an additional ref + if (outp) { + _ll_get(in.get()); + *outp = in.get(); + } + fill_statx(in, caps, stx); + } else { + stx->stx_ino = 0; + stx->stx_mask = 0; + } + + return r; +} + +loff_t Client::ll_lseek(Fh *fh, loff_t offset, int whence) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << "ll_lseek" << std::endl; + tout(cct) << offset << std::endl; + tout(cct) << whence << std::endl; + + std::scoped_lock lock(client_lock); + return _lseek(fh, offset, whence); +} + +int Client::ll_read(Fh *fh, loff_t off, loff_t len, bufferlist *bl) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_read " << fh << " " << fh->inode->ino << " " << " " << off << "~" << len << dendl; + tout(cct) << "ll_read" << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + tout(cct) << off << std::endl; + tout(cct) << len << std::endl; + + /* We can't return bytes written larger than INT_MAX, clamp len to that */ + len = std::min(len, (loff_t)INT_MAX); + std::scoped_lock lock(client_lock); + + int r = _read(fh, off, len, bl); + ldout(cct, 3) << "ll_read " << fh << " " << off << "~" << len << " = " << r + << dendl; + return r; +} + +int Client::ll_read_block(Inode *in, uint64_t blockid, + char *buf, + uint64_t offset, + uint64_t length, + file_layout_t* layout) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + vinodeno_t vino = _get_vino(in); + object_t oid = file_object_t(vino.ino, blockid); + C_SaferCond onfinish; + bufferlist bl; + + objecter->read(oid, + object_locator_t(layout->pool_id), + offset, + length, + vino.snapid, + &bl, + CEPH_OSD_FLAG_READ, + &onfinish); + + int r = onfinish.wait(); + if (r >= 0) { + bl.begin().copy(bl.length(), buf); + r = bl.length(); + } + + return r; +} + +/* It appears that the OSD doesn't return success unless the entire + buffer was written, return the write length on success. */ + +int Client::ll_write_block(Inode *in, uint64_t blockid, + char* buf, uint64_t offset, + uint64_t length, file_layout_t* layout, + uint64_t snapseq, uint32_t sync) +{ + vinodeno_t vino = ll_get_vino(in); + int r = 0; + std::unique_ptr<C_SaferCond> onsafe = nullptr; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + if (length == 0) { + return -CEPHFS_EINVAL; + } + if (true || sync) { + /* if write is stable, the epilogue is waiting on + * flock */ + onsafe.reset(new C_SaferCond("Client::ll_write_block flock")); + } + object_t oid = file_object_t(vino.ino, blockid); + SnapContext fakesnap; + ceph::bufferlist bl; + if (length > 0) { + bl.push_back(buffer::copy(buf, length)); + } + + ldout(cct, 1) << "ll_block_write for " << vino.ino << "." << blockid + << dendl; + + fakesnap.seq = snapseq; + + /* lock just in time */ + objecter->write(oid, + object_locator_t(layout->pool_id), + offset, + length, + fakesnap, + bl, + ceph::real_clock::now(), + 0, + onsafe.get()); + + if (nullptr != onsafe) { + r = onsafe->wait(); + } + + if (r < 0) { + return r; + } else { + return length; + } +} + +int Client::ll_commit_blocks(Inode *in, + uint64_t offset, + uint64_t length) +{ + /* + BarrierContext *bctx; + vinodeno_t vino = _get_vino(in); + uint64_t ino = vino.ino; + + ldout(cct, 1) << "ll_commit_blocks for " << vino.ino << " from " + << offset << " to " << length << dendl; + + if (length == 0) { + return -CEPHFS_EINVAL; + } + + std::scoped_lock lock(client_lock); + map<uint64_t, BarrierContext*>::iterator p = barriers.find(ino); + if (p != barriers.end()) { + barrier_interval civ(offset, offset + length); + p->second->commit_barrier(civ); + } + */ + return 0; +} + +int Client::ll_write(Fh *fh, loff_t off, loff_t len, const char *data) +{ + ldout(cct, 3) << "ll_write " << fh << " " << fh->inode->ino << " " << off << + "~" << len << dendl; + tout(cct) << "ll_write" << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + tout(cct) << off << std::endl; + tout(cct) << len << std::endl; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + /* We can't return bytes written larger than INT_MAX, clamp len to that */ + len = std::min(len, (loff_t)INT_MAX); + std::scoped_lock lock(client_lock); + + int r = _write(fh, off, len, data, NULL, 0); + ldout(cct, 3) << "ll_write " << fh << " " << off << "~" << len << " = " << r + << dendl; + return r; +} + +int64_t Client::ll_writev(struct Fh *fh, const struct iovec *iov, int iovcnt, int64_t off) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock cl(client_lock); + return _preadv_pwritev_locked(fh, iov, iovcnt, off, true, false); +} + +int64_t Client::ll_readv(struct Fh *fh, const struct iovec *iov, int iovcnt, int64_t off) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock cl(client_lock); + return _preadv_pwritev_locked(fh, iov, iovcnt, off, false, false); +} + +int Client::ll_flush(Fh *fh) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_flush " << fh << " " << fh->inode->ino << " " << dendl; + tout(cct) << "ll_flush" << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + return _flush(fh); +} + +int Client::ll_fsync(Fh *fh, bool syncdataonly) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_fsync " << fh << " " << fh->inode->ino << " " << dendl; + tout(cct) << "ll_fsync" << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + int r = _fsync(fh, syncdataonly); + if (r) { + // If we're returning an error, clear it from the FH + fh->take_async_err(); + } + return r; +} + +int Client::ll_sync_inode(Inode *in, bool syncdataonly) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_sync_inode " << *in << " " << dendl; + tout(cct) << "ll_sync_inode" << std::endl; + tout(cct) << (uintptr_t)in << std::endl; + + std::scoped_lock lock(client_lock); + return _fsync(in, syncdataonly); +} + +int Client::clear_suid_sgid(Inode *in, const UserPerm& perms, bool defer) +{ + ldout(cct, 20) << __func__ << " " << *in << "; " << perms << " defer " + << defer << dendl; + + if (!in->is_file()) { + return 0; + } + + if (likely(!(in->mode & (S_ISUID|S_ISGID)))) { + return 0; + } + + if (perms.uid() == 0 || perms.uid() == in->uid) { + return 0; + } + + int mask = 0; + + // always drop the suid + if (unlikely(in->mode & S_ISUID)) { + mask = CEPH_SETATTR_KILL_SUID; + } + + // remove the sgid if S_IXUGO is set or the inode is + // is not in the caller's group list. + if ((in->mode & S_ISGID) && + ((in->mode & S_IXUGO) || !perms.gid_in_groups(in->gid))) { + mask |= CEPH_SETATTR_KILL_SGID; + } + + ldout(cct, 20) << __func__ << " mask " << mask << dendl; + if (defer) { + return mask; + } + + struct ceph_statx stx = { 0 }; + return __setattrx(in, &stx, mask, perms); +} + +int Client::_fallocate(Fh *fh, int mode, int64_t offset, int64_t length) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + if (offset < 0 || length <= 0) + return -CEPHFS_EINVAL; + + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) + return -CEPHFS_EOPNOTSUPP; + + if ((mode & FALLOC_FL_PUNCH_HOLE) && !(mode & FALLOC_FL_KEEP_SIZE)) + return -CEPHFS_EOPNOTSUPP; + + Inode *in = fh->inode.get(); + + if (objecter->osdmap_pool_full(in->layout.pool_id) && + !(mode & FALLOC_FL_PUNCH_HOLE)) { + return -CEPHFS_ENOSPC; + } + + if (in->snapid != CEPH_NOSNAP) + return -CEPHFS_EROFS; + + if ((fh->mode & CEPH_FILE_MODE_WR) == 0) + return -CEPHFS_EBADF; + + uint64_t size = offset + length; + if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) && + size > in->size && + is_quota_bytes_exceeded(in, size - in->size, fh->actor_perms)) { + return -CEPHFS_EDQUOT; + } + + int have; + int r = get_caps(fh, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, &have, -1); + if (r < 0) + return r; + + r = clear_suid_sgid(in, fh->actor_perms); + if (r < 0) { + put_cap_ref(in, CEPH_CAP_FILE_WR); + return r; + } + + std::unique_ptr<C_SaferCond> onuninline = nullptr; + if (mode & FALLOC_FL_PUNCH_HOLE) { + if (in->inline_version < CEPH_INLINE_NONE && + (have & CEPH_CAP_FILE_BUFFER)) { + bufferlist bl; + auto inline_iter = in->inline_data.cbegin(); + int len = in->inline_data.length(); + if (offset < len) { + if (offset > 0) + inline_iter.copy(offset, bl); + int size = length; + if (offset + size > len) + size = len - offset; + if (size > 0) + bl.append_zero(size); + if (offset + size < len) { + inline_iter += size; + inline_iter.copy(len - offset - size, bl); + } + in->inline_data = bl; + in->inline_version++; + } + in->mtime = in->ctime = ceph_clock_now(); + in->change_attr++; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + } else { + if (in->inline_version < CEPH_INLINE_NONE) { + onuninline.reset(new C_SaferCond("Client::_fallocate_uninline_data flock")); + uninline_data(in, onuninline.get()); + } + + C_SaferCond onfinish("Client::_punch_hole flock"); + + get_cap_ref(in, CEPH_CAP_FILE_BUFFER); + + _invalidate_inode_cache(in, offset, length); + filer->zero(in->ino, &in->layout, + in->snaprealm->get_snap_context(), + offset, length, + ceph::real_clock::now(), + 0, true, &onfinish); + in->mtime = in->ctime = ceph_clock_now(); + in->change_attr++; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + + client_lock.unlock(); + onfinish.wait(); + client_lock.lock(); + put_cap_ref(in, CEPH_CAP_FILE_BUFFER); + } + } else if (!(mode & FALLOC_FL_KEEP_SIZE)) { + uint64_t size = offset + length; + if (size > in->size) { + in->size = size; + in->mtime = in->ctime = ceph_clock_now(); + in->change_attr++; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + + if (is_quota_bytes_approaching(in, fh->actor_perms)) { + check_caps(in, CHECK_CAPS_NODELAY); + } else if (is_max_size_approaching(in)) { + check_caps(in, 0); + } + } + } + + if (nullptr != onuninline) { + client_lock.unlock(); + int ret = onuninline->wait(); + client_lock.lock(); + + if (ret >= 0 || ret == -CEPHFS_ECANCELED) { + in->inline_data.clear(); + in->inline_version = CEPH_INLINE_NONE; + in->mark_caps_dirty(CEPH_CAP_FILE_WR); + check_caps(in, 0); + } else + r = ret; + } + + put_cap_ref(in, CEPH_CAP_FILE_WR); + return r; +} + +int Client::ll_fallocate(Fh *fh, int mode, int64_t offset, int64_t length) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " " << fh << " " << fh->inode->ino << " " << dendl; + tout(cct) << __func__ << " " << mode << " " << offset << " " << length << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + return _fallocate(fh, mode, offset, length); +} + +int Client::fallocate(int fd, int mode, loff_t offset, loff_t length) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + tout(cct) << __func__ << " " << fd << mode << " " << offset << " " << length << std::endl; + + std::scoped_lock lock(client_lock); + Fh *fh = get_filehandle(fd); + if (!fh) + return -CEPHFS_EBADF; +#if defined(__linux__) && defined(O_PATH) + if (fh->flags & O_PATH) + return -CEPHFS_EBADF; +#endif + return _fallocate(fh, mode, offset, length); +} + +int Client::ll_release(Fh *fh) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " (fh)" << fh << " " << fh->inode->ino << " " << + dendl; + tout(cct) << __func__ << " (fh)" << std::endl; + tout(cct) << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + + if (ll_unclosed_fh_set.count(fh)) + ll_unclosed_fh_set.erase(fh); + return _release_fh(fh); +} + +int Client::ll_getlk(Fh *fh, struct flock *fl, uint64_t owner) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << "ll_getlk (fh)" << fh << " " << fh->inode->ino << dendl; + tout(cct) << "ll_getk (fh)" << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + return _getlk(fh, fl, owner); +} + +int Client::ll_setlk(Fh *fh, struct flock *fl, uint64_t owner, int sleep) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " (fh) " << fh << " " << fh->inode->ino << dendl; + tout(cct) << __func__ << " (fh)" << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + return _setlk(fh, fl, owner, sleep); +} + +int Client::ll_flock(Fh *fh, int cmd, uint64_t owner) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + ldout(cct, 3) << __func__ << " (fh) " << fh << " " << fh->inode->ino << dendl; + tout(cct) << __func__ << " (fh)" << (uintptr_t)fh << std::endl; + + std::scoped_lock lock(client_lock); + return _flock(fh, cmd, owner); +} + +int Client::set_deleg_timeout(uint32_t timeout) +{ + std::scoped_lock lock(client_lock); + + /* + * The whole point is to prevent blocklisting so we must time out the + * delegation before the session autoclose timeout kicks in. + */ + if (timeout >= mdsmap->get_session_autoclose()) + return -CEPHFS_EINVAL; + + deleg_timeout = timeout; + return 0; +} + +int Client::ll_delegation(Fh *fh, unsigned cmd, ceph_deleg_cb_t cb, void *priv) +{ + int ret = -CEPHFS_EINVAL; + + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Inode *inode = fh->inode.get(); + + switch(cmd) { + case CEPH_DELEGATION_NONE: + inode->unset_deleg(fh); + ret = 0; + break; + default: + try { + ret = inode->set_deleg(fh, cmd, cb, priv); + } catch (std::bad_alloc&) { + ret = -CEPHFS_ENOMEM; + } + break; + } + return ret; +} + +class C_Client_RequestInterrupt : public Context { +private: + Client *client; + MetaRequest *req; +public: + C_Client_RequestInterrupt(Client *c, MetaRequest *r) : client(c), req(r) { + req->get(); + } + void finish(int r) override { + std::scoped_lock l(client->client_lock); + ceph_assert(req->head.op == CEPH_MDS_OP_SETFILELOCK); + client->_interrupt_filelock(req); + client->put_request(req); + } +}; + +void Client::ll_interrupt(void *d) +{ + MetaRequest *req = static_cast<MetaRequest*>(d); + ldout(cct, 3) << __func__ << " tid " << req->get_tid() << dendl; + tout(cct) << __func__ << " tid " << req->get_tid() << std::endl; + interrupt_finisher.queue(new C_Client_RequestInterrupt(this, req)); +} + +// ========================================= +// layout + +// expose file layouts + +int Client::describe_layout(const char *relpath, file_layout_t *lp, + const UserPerm& perms) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + filepath path(relpath); + InodeRef in; + int r = path_walk(path, &in, perms); + if (r < 0) + return r; + + *lp = in->layout; + + ldout(cct, 3) << __func__ << "(" << relpath << ") = 0" << dendl; + return 0; +} + +int Client::fdescribe_layout(int fd, file_layout_t *lp) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + Inode *in = f->inode.get(); + + *lp = in->layout; + + ldout(cct, 3) << __func__ << "(" << fd << ") = 0" << dendl; + return 0; +} + +int64_t Client::get_default_pool_id() +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + /* first data pool is the default */ + return mdsmap->get_first_data_pool(); +} + +// expose osdmap + +int64_t Client::get_pool_id(const char *pool_name) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + return objecter->with_osdmap(std::mem_fn(&OSDMap::lookup_pg_pool_name), + pool_name); +} + +string Client::get_pool_name(int64_t pool) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return string(); + + std::scoped_lock lock(client_lock); + + return objecter->with_osdmap([pool](const OSDMap& o) { + return o.have_pg_pool(pool) ? o.get_pool_name(pool) : string(); + }); +} + +int Client::get_pool_replication(int64_t pool) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + return objecter->with_osdmap([pool](const OSDMap& o) { + return o.have_pg_pool(pool) ? o.get_pg_pool(pool)->get_size() : -CEPHFS_ENOENT; + }); +} + +int Client::get_file_extent_osds(int fd, loff_t off, loff_t *len, vector<int>& osds) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + Inode *in = f->inode.get(); + + vector<ObjectExtent> extents; + Striper::file_to_extents(cct, in->ino, &in->layout, off, 1, in->truncate_size, extents); + ceph_assert(extents.size() == 1); + + objecter->with_osdmap([&](const OSDMap& o) { + pg_t pg = o.object_locator_to_pg(extents[0].oid, extents[0].oloc); + o.pg_to_acting_osds(pg, osds); + }); + + if (osds.empty()) + return -CEPHFS_EINVAL; + + /* + * Return the remainder of the extent (stripe unit) + * + * If length = 1 is passed to Striper::file_to_extents we get a single + * extent back, but its length is one so we still need to compute the length + * to the end of the stripe unit. + * + * If length = su then we may get 1 or 2 objects back in the extents vector + * which would have to be examined. Even then, the offsets are local to the + * object, so matching up to the file offset is extra work. + * + * It seems simpler to stick with length = 1 and manually compute the + * remainder. + */ + if (len) { + uint64_t su = in->layout.stripe_unit; + *len = su - (off % su); + } + + return 0; +} + +int Client::get_osd_crush_location(int id, vector<pair<string, string> >& path) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + if (id < 0) + return -CEPHFS_EINVAL; + return objecter->with_osdmap([&](const OSDMap& o) { + return o.crush->get_full_location_ordered(id, path); + }); +} + +int Client::get_file_stripe_address(int fd, loff_t offset, + vector<entity_addr_t>& address) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + Inode *in = f->inode.get(); + + // which object? + vector<ObjectExtent> extents; + Striper::file_to_extents(cct, in->ino, &in->layout, offset, 1, + in->truncate_size, extents); + ceph_assert(extents.size() == 1); + + // now we have the object and its 'layout' + return objecter->with_osdmap([&](const OSDMap& o) { + pg_t pg = o.object_locator_to_pg(extents[0].oid, extents[0].oloc); + vector<int> osds; + o.pg_to_acting_osds(pg, osds); + if (osds.empty()) + return -CEPHFS_EINVAL; + for (unsigned i = 0; i < osds.size(); i++) { + entity_addr_t addr = o.get_addrs(osds[i]).front(); + address.push_back(addr); + } + return 0; + }); +} + +int Client::get_osd_addr(int osd, entity_addr_t& addr) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + return objecter->with_osdmap([&](const OSDMap& o) { + if (!o.exists(osd)) + return -CEPHFS_ENOENT; + + addr = o.get_addrs(osd).front(); + return 0; + }); +} + +int Client::enumerate_layout(int fd, vector<ObjectExtent>& result, + loff_t length, loff_t offset) +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + Fh *f = get_filehandle(fd); + if (!f) + return -CEPHFS_EBADF; + Inode *in = f->inode.get(); + + // map to a list of extents + Striper::file_to_extents(cct, in->ino, &in->layout, offset, length, in->truncate_size, result); + + ldout(cct, 3) << __func__ << "(" << fd << ", " << length << ", " << offset << ") = 0" << dendl; + return 0; +} + + +/* find an osd with the same ip. -CEPHFS_ENXIO if none. */ +int Client::get_local_osd() +{ + RWRef_t mref_reader(mount_state, CLIENT_MOUNTING); + if (!mref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + std::scoped_lock lock(client_lock); + + objecter->with_osdmap([this](const OSDMap& o) { + if (o.get_epoch() != local_osd_epoch) { + local_osd = o.find_osd_on_ip(messenger->get_myaddrs().front()); + local_osd_epoch = o.get_epoch(); + } + }); + return local_osd; +} + + + + + + +// =============================== + +void Client::ms_handle_connect(Connection *con) +{ + ldout(cct, 10) << __func__ << " on " << con->get_peer_addr() << dendl; +} + +bool Client::ms_handle_reset(Connection *con) +{ + ldout(cct, 0) << __func__ << " on " << con->get_peer_addr() << dendl; + return false; +} + +void Client::ms_handle_remote_reset(Connection *con) +{ + std::scoped_lock lock(client_lock); + ldout(cct, 0) << __func__ << " on " << con->get_peer_addr() << dendl; + switch (con->get_peer_type()) { + case CEPH_ENTITY_TYPE_MDS: + { + // kludge to figure out which mds this is; fixme with a Connection* state + mds_rank_t mds = MDS_RANK_NONE; + MetaSessionRef s = NULL; + for (auto &p : mds_sessions) { + if (mdsmap->have_inst(p.first) && mdsmap->get_addrs(p.first) == con->get_peer_addrs()) { + mds = p.first; + s = p.second; + } + } + if (mds >= 0) { + ceph_assert(s != NULL); + switch (s->state) { + case MetaSession::STATE_CLOSING: + ldout(cct, 1) << "reset from mds we were closing; we'll call that closed" << dendl; + _closed_mds_session(s.get()); + break; + + case MetaSession::STATE_OPENING: + { + ldout(cct, 1) << "reset from mds we were opening; retrying" << dendl; + list<Context*> waiters; + waiters.swap(s->waiting_for_open); + _closed_mds_session(s.get()); + auto news = _get_or_open_mds_session(mds); + news->waiting_for_open.swap(waiters); + } + break; + + case MetaSession::STATE_OPEN: + { + objecter->maybe_request_map(); /* to check if we are blocklisted */ + if (cct->_conf.get_val<bool>("client_reconnect_stale")) { + ldout(cct, 1) << "reset from mds we were open; close mds session for reconnect" << dendl; + _closed_mds_session(s.get()); + } else { + ldout(cct, 1) << "reset from mds we were open; mark session as stale" << dendl; + s->state = MetaSession::STATE_STALE; + } + } + break; + + case MetaSession::STATE_NEW: + case MetaSession::STATE_CLOSED: + default: + break; + } + } + } + break; + } +} + +bool Client::ms_handle_refused(Connection *con) +{ + ldout(cct, 1) << __func__ << " on " << con->get_peer_addr() << dendl; + return false; +} + +Inode *Client::get_quota_root(Inode *in, const UserPerm& perms, quota_max_t type) +{ + Inode *quota_in = root_ancestor; + SnapRealm *realm = in->snaprealm; + + if (!cct->_conf.get_val<bool>("client_quota")) + return NULL; + + while (realm) { + ldout(cct, 10) << __func__ << " realm " << realm->ino << dendl; + if (realm->ino != in->ino) { + auto p = inode_map.find(vinodeno_t(realm->ino, CEPH_NOSNAP)); + if (p == inode_map.end()) + break; + + if (p->second->quota.is_enabled(type)) { + quota_in = p->second; + break; + } + } + realm = realm->pparent; + } + ldout(cct, 10) << __func__ << " " << in->vino() << " -> " << quota_in->vino() << dendl; + return quota_in; +} + +/** + * Traverse quota ancestors of the Inode, return true + * if any of them passes the passed function + */ +bool Client::check_quota_condition(Inode *in, const UserPerm& perms, + std::function<bool (const Inode &in)> test) +{ + if (!cct->_conf.get_val<bool>("client_quota")) + return false; + + while (true) { + ceph_assert(in != NULL); + if (test(*in)) { + return true; + } + + if (in == root_ancestor) { + // We're done traversing, drop out + return false; + } else { + // Continue up the tree + in = get_quota_root(in, perms); + } + } + + return false; +} + +bool Client::is_quota_files_exceeded(Inode *in, const UserPerm& perms) +{ + return check_quota_condition(in, perms, + [](const Inode &in) { + return in.quota.max_files && in.rstat.rsize() >= in.quota.max_files; + }); +} + +bool Client::is_quota_bytes_exceeded(Inode *in, int64_t new_bytes, + const UserPerm& perms) +{ + return check_quota_condition(in, perms, + [&new_bytes](const Inode &in) { + return in.quota.max_bytes && (in.rstat.rbytes + new_bytes) + > in.quota.max_bytes; + }); +} + +bool Client::is_quota_bytes_approaching(Inode *in, const UserPerm& perms) +{ + ceph_assert(in->size >= in->reported_size); + const uint64_t size = in->size - in->reported_size; + return check_quota_condition(in, perms, + [&size](const Inode &in) { + if (in.quota.max_bytes) { + if (in.rstat.rbytes >= in.quota.max_bytes) { + return true; + } + + const uint64_t space = in.quota.max_bytes - in.rstat.rbytes; + return (space >> 4) < size; + } else { + return false; + } + }); +} + +enum { + POOL_CHECKED = 1, + POOL_CHECKING = 2, + POOL_READ = 4, + POOL_WRITE = 8, +}; + +int Client::check_pool_perm(Inode *in, int need) +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + if (!cct->_conf->client_check_pool_perm) + return 0; + + /* Only need to do this for regular files */ + if (!in->is_file()) + return 0; + + int64_t pool_id = in->layout.pool_id; + std::string pool_ns = in->layout.pool_ns; + std::pair<int64_t, std::string> perm_key(pool_id, pool_ns); + int have = 0; + while (true) { + auto it = pool_perms.find(perm_key); + if (it == pool_perms.end()) + break; + if (it->second == POOL_CHECKING) { + // avoid concurrent checkings + wait_on_list(waiting_for_pool_perm); + } else { + have = it->second; + ceph_assert(have & POOL_CHECKED); + break; + } + } + + if (!have) { + if (in->snapid != CEPH_NOSNAP) { + // pool permission check needs to write to the first object. But for snapshot, + // head of the first object may have already been deleted. To avoid creating + // orphan object, skip the check for now. + return 0; + } + + pool_perms[perm_key] = POOL_CHECKING; + + char oid_buf[32]; + snprintf(oid_buf, sizeof(oid_buf), "%llx.00000000", (unsigned long long)in->ino); + object_t oid = oid_buf; + + SnapContext nullsnapc; + + C_SaferCond rd_cond; + ObjectOperation rd_op; + rd_op.stat(nullptr, nullptr, nullptr); + + objecter->mutate(oid, OSDMap::file_to_object_locator(in->layout), rd_op, + nullsnapc, ceph::real_clock::now(), 0, &rd_cond); + + C_SaferCond wr_cond; + ObjectOperation wr_op; + wr_op.create(true); + + objecter->mutate(oid, OSDMap::file_to_object_locator(in->layout), wr_op, + nullsnapc, ceph::real_clock::now(), 0, &wr_cond); + + client_lock.unlock(); + int rd_ret = rd_cond.wait(); + int wr_ret = wr_cond.wait(); + client_lock.lock(); + + bool errored = false; + + if (rd_ret == 0 || rd_ret == -CEPHFS_ENOENT) + have |= POOL_READ; + else if (rd_ret != -CEPHFS_EPERM) { + ldout(cct, 10) << __func__ << " on pool " << pool_id << " ns " << pool_ns + << " rd_err = " << rd_ret << " wr_err = " << wr_ret << dendl; + errored = true; + } + + if (wr_ret == 0 || wr_ret == -CEPHFS_EEXIST) + have |= POOL_WRITE; + else if (wr_ret != -CEPHFS_EPERM) { + ldout(cct, 10) << __func__ << " on pool " << pool_id << " ns " << pool_ns + << " rd_err = " << rd_ret << " wr_err = " << wr_ret << dendl; + errored = true; + } + + if (errored) { + // Indeterminate: erase CHECKING state so that subsequent calls re-check. + // Raise EIO because actual error code might be misleading for + // userspace filesystem user. + pool_perms.erase(perm_key); + signal_cond_list(waiting_for_pool_perm); + return -CEPHFS_EIO; + } + + pool_perms[perm_key] = have | POOL_CHECKED; + signal_cond_list(waiting_for_pool_perm); + } + + if ((need & CEPH_CAP_FILE_RD) && !(have & POOL_READ)) { + ldout(cct, 10) << __func__ << " on pool " << pool_id << " ns " << pool_ns + << " need " << ccap_string(need) << ", but no read perm" << dendl; + return -CEPHFS_EPERM; + } + if ((need & CEPH_CAP_FILE_WR) && !(have & POOL_WRITE)) { + ldout(cct, 10) << __func__ << " on pool " << pool_id << " ns " << pool_ns + << " need " << ccap_string(need) << ", but no write perm" << dendl; + return -CEPHFS_EPERM; + } + + return 0; +} + +int Client::_posix_acl_permission(Inode *in, const UserPerm& perms, unsigned want) +{ + if (acl_type == POSIX_ACL) { + if (in->xattrs.count(ACL_EA_ACCESS)) { + const bufferptr& access_acl = in->xattrs[ACL_EA_ACCESS]; + + return posix_acl_permits(access_acl, in->uid, in->gid, perms, want); + } + } + return -CEPHFS_EAGAIN; +} + +int Client::_posix_acl_chmod(Inode *in, mode_t mode, const UserPerm& perms) +{ + if (acl_type == NO_ACL) + return 0; + + int r = _getattr(in, CEPH_STAT_CAP_XATTR, perms, in->xattr_version == 0); + if (r < 0) + goto out; + + if (acl_type == POSIX_ACL) { + if (in->xattrs.count(ACL_EA_ACCESS)) { + const bufferptr& access_acl = in->xattrs[ACL_EA_ACCESS]; + bufferptr acl(access_acl.c_str(), access_acl.length()); + r = posix_acl_access_chmod(acl, mode); + if (r < 0) + goto out; + r = _do_setxattr(in, ACL_EA_ACCESS, acl.c_str(), acl.length(), 0, perms); + } else { + r = 0; + } + } +out: + ldout(cct, 10) << __func__ << " ino " << in->ino << " result=" << r << dendl; + return r; +} + +int Client::_posix_acl_create(Inode *dir, mode_t *mode, bufferlist& xattrs_bl, + const UserPerm& perms) +{ + if (acl_type == NO_ACL) + return 0; + + if (S_ISLNK(*mode)) + return 0; + + int r = _getattr(dir, CEPH_STAT_CAP_XATTR, perms, dir->xattr_version == 0); + if (r < 0) + goto out; + + if (acl_type == POSIX_ACL) { + if (dir->xattrs.count(ACL_EA_DEFAULT)) { + map<string, bufferptr> xattrs; + + const bufferptr& default_acl = dir->xattrs[ACL_EA_DEFAULT]; + bufferptr acl(default_acl.c_str(), default_acl.length()); + r = posix_acl_inherit_mode(acl, mode); + if (r < 0) + goto out; + + if (r > 0) { + r = posix_acl_equiv_mode(acl.c_str(), acl.length(), mode); + if (r < 0) + goto out; + if (r > 0) + xattrs[ACL_EA_ACCESS] = acl; + } + + if (S_ISDIR(*mode)) + xattrs[ACL_EA_DEFAULT] = dir->xattrs[ACL_EA_DEFAULT]; + + r = xattrs.size(); + if (r > 0) + encode(xattrs, xattrs_bl); + } else { + if (umask_cb) + *mode &= ~umask_cb(callback_handle); + r = 0; + } + } +out: + ldout(cct, 10) << __func__ << " dir ino " << dir->ino << " result=" << r << dendl; + return r; +} + +void Client::set_filer_flags(int flags) +{ + std::scoped_lock l(client_lock); + ceph_assert(flags == 0 || + flags == CEPH_OSD_FLAG_LOCALIZE_READS); + objecter->add_global_op_flags(flags); +} + +void Client::clear_filer_flags(int flags) +{ + std::scoped_lock l(client_lock); + ceph_assert(flags == CEPH_OSD_FLAG_LOCALIZE_READS); + objecter->clear_global_op_flag(flags); +} + +// called before mount +void Client::set_uuid(const std::string& uuid) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + ceph_assert(iref_reader.is_state_satisfied()); + + std::scoped_lock l(client_lock); + ceph_assert(!uuid.empty()); + + metadata["uuid"] = uuid; + _close_sessions(); +} + +// called before mount. 0 means infinite +void Client::set_session_timeout(unsigned timeout) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + ceph_assert(iref_reader.is_state_satisfied()); + + std::scoped_lock l(client_lock); + + metadata["timeout"] = stringify(timeout); +} + +// called before mount +int Client::start_reclaim(const std::string& uuid, unsigned flags, + const std::string& fs_name) +{ + RWRef_t iref_reader(initialize_state, CLIENT_INITIALIZED); + if (!iref_reader.is_state_satisfied()) + return -CEPHFS_ENOTCONN; + + if (uuid.empty()) + return -CEPHFS_EINVAL; + + std::unique_lock l(client_lock); + { + auto it = metadata.find("uuid"); + if (it != metadata.end() && it->second == uuid) + return -CEPHFS_EINVAL; + } + + int r = subscribe_mdsmap(fs_name); + if (r < 0) { + lderr(cct) << "mdsmap subscription failed: " << cpp_strerror(r) << dendl; + return r; + } + + if (metadata.empty()) + populate_metadata(""); + + while (mdsmap->get_epoch() == 0) + wait_on_list(waiting_for_mdsmap); + + reclaim_errno = 0; + for (unsigned mds = 0; mds < mdsmap->get_num_in_mds(); ) { + if (!mdsmap->is_up(mds)) { + ldout(cct, 10) << "mds." << mds << " not active, waiting for new mdsmap" << dendl; + wait_on_list(waiting_for_mdsmap); + continue; + } + + MetaSessionRef session; + if (!have_open_session(mds)) { + session = _get_or_open_mds_session(mds); + if (session->state == MetaSession::STATE_REJECTED) + return -CEPHFS_EPERM; + if (session->state != MetaSession::STATE_OPENING) { + // umounting? + return -CEPHFS_EINVAL; + } + ldout(cct, 10) << "waiting for session to mds." << mds << " to open" << dendl; + wait_on_context_list(session->waiting_for_open); + continue; + } + + session = mds_sessions.at(mds); + if (!session->mds_features.test(CEPHFS_FEATURE_RECLAIM_CLIENT)) + return -CEPHFS_EOPNOTSUPP; + + if (session->reclaim_state == MetaSession::RECLAIM_NULL || + session->reclaim_state == MetaSession::RECLAIMING) { + session->reclaim_state = MetaSession::RECLAIMING; + auto m = make_message<MClientReclaim>(uuid, flags); + session->con->send_message2(std::move(m)); + wait_on_list(waiting_for_reclaim); + } else if (session->reclaim_state == MetaSession::RECLAIM_FAIL) { + return reclaim_errno ? : -CEPHFS_ENOTRECOVERABLE; + } else { + mds++; + } + } + + // didn't find target session in any mds + if (reclaim_target_addrs.empty()) { + if (flags & CEPH_RECLAIM_RESET) + return -CEPHFS_ENOENT; + return -CEPHFS_ENOTRECOVERABLE; + } + + if (flags & CEPH_RECLAIM_RESET) + return 0; + + // use blocklist to check if target session was killed + // (config option mds_session_blocklist_on_evict needs to be true) + ldout(cct, 10) << __func__ << ": waiting for OSD epoch " << reclaim_osd_epoch << dendl; + bs::error_code ec; + l.unlock(); + objecter->wait_for_map(reclaim_osd_epoch, ca::use_blocked[ec]); + l.lock(); + + if (ec) + return ceph::from_error_code(ec); + + bool blocklisted = objecter->with_osdmap( + [this](const OSDMap &osd_map) -> bool { + return osd_map.is_blocklisted(reclaim_target_addrs); + }); + if (blocklisted) + return -CEPHFS_ENOTRECOVERABLE; + + metadata["reclaiming_uuid"] = uuid; + return 0; +} + +void Client::finish_reclaim() +{ + auto it = metadata.find("reclaiming_uuid"); + if (it == metadata.end()) { + for (auto &p : mds_sessions) + p.second->reclaim_state = MetaSession::RECLAIM_NULL; + return; + } + + for (auto &p : mds_sessions) { + p.second->reclaim_state = MetaSession::RECLAIM_NULL; + auto m = make_message<MClientReclaim>("", MClientReclaim::FLAG_FINISH); + p.second->con->send_message2(std::move(m)); + } + + metadata["uuid"] = it->second; + metadata.erase(it); +} + +void Client::handle_client_reclaim_reply(const MConstRef<MClientReclaimReply>& reply) +{ + mds_rank_t from = mds_rank_t(reply->get_source().num()); + ldout(cct, 10) << __func__ << " " << *reply << " from mds." << from << dendl; + + std::scoped_lock cl(client_lock); + auto session = _get_mds_session(from, reply->get_connection().get()); + if (!session) { + ldout(cct, 10) << " discarding reclaim reply from sessionless mds." << from << dendl; + return; + } + + if (reply->get_result() >= 0) { + session->reclaim_state = MetaSession::RECLAIM_OK; + if (reply->get_epoch() > reclaim_osd_epoch) + reclaim_osd_epoch = reply->get_epoch(); + if (!reply->get_addrs().empty()) + reclaim_target_addrs = reply->get_addrs(); + } else { + session->reclaim_state = MetaSession::RECLAIM_FAIL; + reclaim_errno = reply->get_result(); + } + + signal_cond_list(waiting_for_reclaim); +} + +/** + * This is included in cap release messages, to cause + * the MDS to wait until this OSD map epoch. It is necessary + * in corner cases where we cancel RADOS ops, so that + * nobody else tries to do IO to the same objects in + * the same epoch as the cancelled ops. + */ +void Client::set_cap_epoch_barrier(epoch_t e) +{ + ldout(cct, 5) << __func__ << " epoch = " << e << dendl; + cap_epoch_barrier = e; +} + +const char** Client::get_tracked_conf_keys() const +{ + static const char* keys[] = { + "client_cache_size", + "client_cache_mid", + "client_acl_type", + "client_deleg_timeout", + "client_deleg_break_on_open", + "client_oc_size", + "client_oc_max_objects", + "client_oc_max_dirty", + "client_oc_target_dirty", + "client_oc_max_dirty_age", + "client_caps_release_delay", + "client_mount_timeout", + NULL + }; + return keys; +} + +void Client::handle_conf_change(const ConfigProxy& conf, + const std::set <std::string> &changed) +{ + std::scoped_lock lock(client_lock); + + if (changed.count("client_cache_mid")) { + lru.lru_set_midpoint(cct->_conf->client_cache_mid); + } + if (changed.count("client_acl_type")) { + acl_type = NO_ACL; + if (cct->_conf->client_acl_type == "posix_acl") + acl_type = POSIX_ACL; + } + if (changed.count("client_oc_size")) { + objectcacher->set_max_size(cct->_conf->client_oc_size); + } + if (changed.count("client_oc_max_objects")) { + objectcacher->set_max_objects(cct->_conf->client_oc_max_objects); + } + if (changed.count("client_oc_max_dirty")) { + objectcacher->set_max_dirty(cct->_conf->client_oc_max_dirty); + } + if (changed.count("client_oc_target_dirty")) { + objectcacher->set_target_dirty(cct->_conf->client_oc_target_dirty); + } + if (changed.count("client_oc_max_dirty_age")) { + objectcacher->set_max_dirty_age(cct->_conf->client_oc_max_dirty_age); + } + if (changed.count("client_collect_and_send_global_metrics")) { + _collect_and_send_global_metrics = cct->_conf.get_val<bool>( + "client_collect_and_send_global_metrics"); + } + if (changed.count("client_caps_release_delay")) { + caps_release_delay = cct->_conf.get_val<std::chrono::seconds>( + "client_caps_release_delay"); + } + if (changed.count("client_mount_timeout")) { + mount_timeout = cct->_conf.get_val<std::chrono::seconds>( + "client_mount_timeout"); + } +} + +void intrusive_ptr_add_ref(Inode *in) +{ + in->iget(); +} + +void intrusive_ptr_release(Inode *in) +{ + in->client->put_inode(in); +} + +mds_rank_t Client::_get_random_up_mds() const +{ + ceph_assert(ceph_mutex_is_locked_by_me(client_lock)); + + std::set<mds_rank_t> up; + mdsmap->get_up_mds_set(up); + + if (up.empty()) + return MDS_RANK_NONE; + std::set<mds_rank_t>::const_iterator p = up.begin(); + for (int n = rand() % up.size(); n; n--) + ++p; + return *p; +} + + +StandaloneClient::StandaloneClient(Messenger *m, MonClient *mc, + boost::asio::io_context& ictx) + : Client(m, mc, new Objecter(m->cct, m, mc, ictx)) +{ + monclient->set_messenger(m); + objecter->set_client_incarnation(0); +} + +StandaloneClient::~StandaloneClient() +{ + delete objecter; + objecter = nullptr; +} + +int StandaloneClient::init() +{ + RWRef_t iref_writer(initialize_state, CLIENT_INITIALIZING, false); + ceph_assert(iref_writer.is_first_writer()); + + _pre_init(); + objecter->init(); + + client_lock.lock(); + + messenger->add_dispatcher_tail(objecter); + messenger->add_dispatcher_tail(this); + + monclient->set_want_keys(CEPH_ENTITY_TYPE_MDS | CEPH_ENTITY_TYPE_OSD); + int r = monclient->init(); + if (r < 0) { + // need to do cleanup because we're in an intermediate init state + { + std::scoped_lock l(timer_lock); + timer.shutdown(); + } + + client_lock.unlock(); + objecter->shutdown(); + objectcacher->stop(); + monclient->shutdown(); + return r; + } + objecter->start(); + + client_lock.unlock(); + _finish_init(); + iref_writer.update_state(CLIENT_INITIALIZED); + + return 0; +} + +void StandaloneClient::shutdown() +{ + Client::shutdown(); + objecter->shutdown(); + monclient->shutdown(); +} |