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-rw-r--r--src/os/memstore/MemStore.cc1800
-rw-r--r--src/os/memstore/MemStore.h406
-rw-r--r--src/os/memstore/PageSet.h232
3 files changed, 2438 insertions, 0 deletions
diff --git a/src/os/memstore/MemStore.cc b/src/os/memstore/MemStore.cc
new file mode 100644
index 000000000..dc29ab1b6
--- /dev/null
+++ b/src/os/memstore/MemStore.cc
@@ -0,0 +1,1800 @@
+// -*- 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) 2013 Inktank
+ *
+ * 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.
+ *
+ */
+#include "acconfig.h"
+
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#include "include/types.h"
+#include "include/stringify.h"
+#include "include/unordered_map.h"
+#include "common/errno.h"
+#include "MemStore.h"
+#include "include/compat.h"
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_filestore
+#undef dout_prefix
+#define dout_prefix *_dout << "memstore(" << path << ") "
+
+using ceph::decode;
+using ceph::encode;
+
+// for comparing collections for lock ordering
+bool operator>(const MemStore::CollectionRef& l,
+ const MemStore::CollectionRef& r)
+{
+ return (unsigned long)l.get() > (unsigned long)r.get();
+}
+
+
+int MemStore::mount()
+{
+ int r = _load();
+ if (r < 0)
+ return r;
+ finisher.start();
+ return 0;
+}
+
+int MemStore::umount()
+{
+ finisher.wait_for_empty();
+ finisher.stop();
+ return _save();
+}
+
+int MemStore::_save()
+{
+ dout(10) << __func__ << dendl;
+ dump_all();
+ std::set<coll_t> collections;
+ for (auto p = coll_map.begin(); p != coll_map.end(); ++p) {
+ dout(20) << __func__ << " coll " << p->first << " " << p->second << dendl;
+ collections.insert(p->first);
+ ceph::buffer::list bl;
+ ceph_assert(p->second);
+ p->second->encode(bl);
+ std::string fn = path + "/" + stringify(p->first);
+ int r = bl.write_file(fn.c_str());
+ if (r < 0)
+ return r;
+ }
+
+ std::string fn = path + "/collections";
+ ceph::buffer::list bl;
+ encode(collections, bl);
+ int r = bl.write_file(fn.c_str());
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+void MemStore::dump_all()
+{
+ auto f = ceph::Formatter::create("json-pretty");
+ f->open_object_section("store");
+ dump(f);
+ f->close_section();
+ dout(0) << "dump:";
+ f->flush(*_dout);
+ *_dout << dendl;
+ delete f;
+}
+
+void MemStore::dump(ceph::Formatter *f)
+{
+ f->open_array_section("collections");
+ for (auto p = coll_map.begin(); p != coll_map.end(); ++p) {
+ f->open_object_section("collection");
+ f->dump_string("name", stringify(p->first));
+
+ f->open_array_section("xattrs");
+ for (auto q = p->second->xattr.begin();
+ q != p->second->xattr.end();
+ ++q) {
+ f->open_object_section("xattr");
+ f->dump_string("name", q->first);
+ f->dump_int("length", q->second.length());
+ f->close_section();
+ }
+ f->close_section();
+
+ f->open_array_section("objects");
+ for (auto q = p->second->object_map.begin();
+ q != p->second->object_map.end();
+ ++q) {
+ f->open_object_section("object");
+ f->dump_string("name", stringify(q->first));
+ if (q->second)
+ q->second->dump(f);
+ f->close_section();
+ }
+ f->close_section();
+
+ f->close_section();
+ }
+ f->close_section();
+}
+
+int MemStore::_load()
+{
+ dout(10) << __func__ << dendl;
+ ceph::buffer::list bl;
+ std::string fn = path + "/collections";
+ std::string err;
+ int r = bl.read_file(fn.c_str(), &err);
+ if (r < 0)
+ return r;
+
+ std::set<coll_t> collections;
+ auto p = bl.cbegin();
+ decode(collections, p);
+
+ for (auto q = collections.begin();
+ q != collections.end();
+ ++q) {
+ std::string fn = path + "/" + stringify(*q);
+ ceph::buffer::list cbl;
+ int r = cbl.read_file(fn.c_str(), &err);
+ if (r < 0)
+ return r;
+ auto c = ceph::make_ref<Collection>(cct, *q);
+ auto p = cbl.cbegin();
+ c->decode(p);
+ coll_map[*q] = c;
+ used_bytes += c->used_bytes();
+ }
+
+ dump_all();
+
+ return 0;
+}
+
+void MemStore::set_fsid(uuid_d u)
+{
+ int r = write_meta("fsid", stringify(u));
+ ceph_assert(r >= 0);
+}
+
+uuid_d MemStore::get_fsid()
+{
+ std::string fsid_str;
+ int r = read_meta("fsid", &fsid_str);
+ ceph_assert(r >= 0);
+ uuid_d uuid;
+ bool b = uuid.parse(fsid_str.c_str());
+ ceph_assert(b);
+ return uuid;
+}
+
+int MemStore::mkfs()
+{
+ std::string fsid_str;
+ int r = read_meta("fsid", &fsid_str);
+ if (r == -ENOENT) {
+ uuid_d fsid;
+ fsid.generate_random();
+ fsid_str = stringify(fsid);
+ r = write_meta("fsid", fsid_str);
+ if (r < 0)
+ return r;
+ dout(1) << __func__ << " new fsid " << fsid_str << dendl;
+ } else if (r < 0) {
+ return r;
+ } else {
+ dout(1) << __func__ << " had fsid " << fsid_str << dendl;
+ }
+
+ std::string fn = path + "/collections";
+ derr << path << dendl;
+ ceph::buffer::list bl;
+ std::set<coll_t> collections;
+ encode(collections, bl);
+ r = bl.write_file(fn.c_str());
+ if (r < 0)
+ return r;
+
+ r = write_meta("type", "memstore");
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int MemStore::statfs(struct store_statfs_t *st, osd_alert_list_t* alerts)
+{
+ dout(10) << __func__ << dendl;
+ if (alerts) {
+ alerts->clear(); // returns nothing for now
+ }
+ st->reset();
+ st->total = cct->_conf->memstore_device_bytes;
+ st->available = std::max<int64_t>(st->total - used_bytes, 0);
+ dout(10) << __func__ << ": used_bytes: " << used_bytes
+ << "/" << cct->_conf->memstore_device_bytes << dendl;
+ return 0;
+}
+
+int MemStore::pool_statfs(uint64_t pool_id, struct store_statfs_t *buf,
+ bool *per_pool_omap)
+{
+ return -ENOTSUP;
+}
+
+objectstore_perf_stat_t MemStore::get_cur_stats()
+{
+ // fixme
+ return objectstore_perf_stat_t();
+}
+
+MemStore::CollectionRef MemStore::get_collection(const coll_t& cid)
+{
+ std::shared_lock l{coll_lock};
+ ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid);
+ if (cp == coll_map.end())
+ return CollectionRef();
+ return cp->second;
+}
+
+ObjectStore::CollectionHandle MemStore::create_new_collection(const coll_t& cid)
+{
+ std::lock_guard l{coll_lock};
+ auto c = ceph::make_ref<Collection>(cct, cid);
+ new_coll_map[cid] = c;
+ return c;
+}
+
+
+// ---------------
+// read operations
+
+bool MemStore::exists(CollectionHandle &c_, const ghobject_t& oid)
+{
+ Collection *c = static_cast<Collection*>(c_.get());
+ dout(10) << __func__ << " " << c->get_cid() << " " << oid << dendl;
+ if (!c->exists)
+ return false;
+
+ // Perform equivalent of c->get_object_(oid) != NULL. In C++11 the
+ // shared_ptr needs to be compared to nullptr.
+ return (bool)c->get_object(oid);
+}
+
+int MemStore::stat(
+ CollectionHandle &c_,
+ const ghobject_t& oid,
+ struct stat *st,
+ bool allow_eio)
+{
+ Collection *c = static_cast<Collection*>(c_.get());
+ dout(10) << __func__ << " " << c->cid << " " << oid << dendl;
+ if (!c->exists)
+ return -ENOENT;
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ st->st_size = o->get_size();
+ st->st_blksize = 4096;
+ st->st_blocks = (st->st_size + st->st_blksize - 1) / st->st_blksize;
+ st->st_nlink = 1;
+ return 0;
+}
+
+int MemStore::set_collection_opts(
+ CollectionHandle& ch,
+ const pool_opts_t& opts)
+{
+ return -EOPNOTSUPP;
+}
+
+int MemStore::read(
+ CollectionHandle &c_,
+ const ghobject_t& oid,
+ uint64_t offset,
+ size_t len,
+ ceph::buffer::list& bl,
+ uint32_t op_flags)
+{
+ Collection *c = static_cast<Collection*>(c_.get());
+ dout(10) << __func__ << " " << c->cid << " " << oid << " "
+ << offset << "~" << len << dendl;
+ if (!c->exists)
+ return -ENOENT;
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ if (offset >= o->get_size())
+ return 0;
+ size_t l = len;
+ if (l == 0 && offset == 0) // note: len == 0 means read the entire object
+ l = o->get_size();
+ else if (offset + l > o->get_size())
+ l = o->get_size() - offset;
+ bl.clear();
+ return o->read(offset, l, bl);
+}
+
+int MemStore::fiemap(CollectionHandle& ch, const ghobject_t& oid,
+ uint64_t offset, size_t len, ceph::buffer::list& bl)
+{
+ std::map<uint64_t, uint64_t> destmap;
+ int r = fiemap(ch, oid, offset, len, destmap);
+ if (r >= 0)
+ encode(destmap, bl);
+ return r;
+}
+
+int MemStore::fiemap(CollectionHandle& ch, const ghobject_t& oid,
+ uint64_t offset, size_t len, std::map<uint64_t, uint64_t>& destmap)
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << " " << offset << "~"
+ << len << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ size_t l = len;
+ if (offset + l > o->get_size())
+ l = o->get_size() - offset;
+ if (offset >= o->get_size())
+ goto out;
+ destmap[offset] = l;
+ out:
+ return 0;
+}
+
+int MemStore::getattr(CollectionHandle &c_, const ghobject_t& oid,
+ const char *name, ceph::buffer::ptr& value)
+{
+ Collection *c = static_cast<Collection*>(c_.get());
+ dout(10) << __func__ << " " << c->cid << " " << oid << " " << name << dendl;
+ if (!c->exists)
+ return -ENOENT;
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::string k(name);
+ std::lock_guard lock{o->xattr_mutex};
+ if (!o->xattr.count(k)) {
+ return -ENODATA;
+ }
+ value = o->xattr[k];
+ return 0;
+}
+
+int MemStore::getattrs(CollectionHandle &c_, const ghobject_t& oid,
+ std::map<std::string,ceph::buffer::ptr>& aset)
+{
+ Collection *c = static_cast<Collection*>(c_.get());
+ dout(10) << __func__ << " " << c->cid << " " << oid << dendl;
+ if (!c->exists)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->xattr_mutex};
+ aset = o->xattr;
+ return 0;
+}
+
+int MemStore::list_collections(std::vector<coll_t>& ls)
+{
+ dout(10) << __func__ << dendl;
+ std::shared_lock l{coll_lock};
+ for (ceph::unordered_map<coll_t,CollectionRef>::iterator p = coll_map.begin();
+ p != coll_map.end();
+ ++p) {
+ ls.push_back(p->first);
+ }
+ return 0;
+}
+
+bool MemStore::collection_exists(const coll_t& cid)
+{
+ dout(10) << __func__ << " " << cid << dendl;
+ std::shared_lock l{coll_lock};
+ return coll_map.count(cid);
+}
+
+int MemStore::collection_empty(CollectionHandle& ch, bool *empty)
+{
+ dout(10) << __func__ << " " << ch->cid << dendl;
+ CollectionRef c = static_cast<Collection*>(ch.get());
+ std::shared_lock l{c->lock};
+ *empty = c->object_map.empty();
+ return 0;
+}
+
+int MemStore::collection_bits(CollectionHandle& ch)
+{
+ dout(10) << __func__ << " " << ch->cid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ std::shared_lock l{c->lock};
+ return c->bits;
+}
+
+int MemStore::collection_list(CollectionHandle& ch,
+ const ghobject_t& start,
+ const ghobject_t& end,
+ int max,
+ std::vector<ghobject_t> *ls, ghobject_t *next)
+{
+ Collection *c = static_cast<Collection*>(ch.get());
+ std::shared_lock l{c->lock};
+
+ dout(10) << __func__ << " cid " << ch->cid << " start " << start
+ << " end " << end << dendl;
+ auto p = c->object_map.lower_bound(start);
+ while (p != c->object_map.end() &&
+ ls->size() < (unsigned)max &&
+ p->first < end) {
+ ls->push_back(p->first);
+ ++p;
+ }
+ if (next != NULL) {
+ if (p == c->object_map.end())
+ *next = ghobject_t::get_max();
+ else
+ *next = p->first;
+ }
+ dout(10) << __func__ << " cid " << ch->cid << " got " << ls->size() << dendl;
+ return 0;
+}
+
+int MemStore::omap_get(
+ CollectionHandle& ch, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ ceph::buffer::list *header, ///< [out] omap header
+ std::map<std::string, ceph::buffer::list> *out /// < [out] Key to value map
+ )
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ *header = o->omap_header;
+ *out = o->omap;
+ return 0;
+}
+
+int MemStore::omap_get_header(
+ CollectionHandle& ch, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ ceph::buffer::list *header, ///< [out] omap header
+ bool allow_eio ///< [in] don't assert on eio
+ )
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ *header = o->omap_header;
+ return 0;
+}
+
+int MemStore::omap_get_keys(
+ CollectionHandle& ch, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ std::set<std::string> *keys ///< [out] Keys defined on oid
+ )
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ for (auto p = o->omap.begin(); p != o->omap.end(); ++p)
+ keys->insert(p->first);
+ return 0;
+}
+
+int MemStore::omap_get_values(
+ CollectionHandle& ch, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ const std::set<std::string> &keys, ///< [in] Keys to get
+ std::map<std::string, ceph::buffer::list> *out ///< [out] Returned keys and values
+ )
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ for (auto p = keys.begin(); p != keys.end(); ++p) {
+ auto q = o->omap.find(*p);
+ if (q != o->omap.end())
+ out->insert(*q);
+ }
+ return 0;
+}
+
+int MemStore::omap_check_keys(
+ CollectionHandle& ch, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ const std::set<std::string> &keys, ///< [in] Keys to check
+ std::set<std::string> *out ///< [out] Subset of keys defined on oid
+ )
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ for (auto p = keys.begin(); p != keys.end(); ++p) {
+ auto q = o->omap.find(*p);
+ if (q != o->omap.end())
+ out->insert(*p);
+ }
+ return 0;
+}
+
+class MemStore::OmapIteratorImpl : public ObjectMap::ObjectMapIteratorImpl {
+ CollectionRef c;
+ ObjectRef o;
+ std::map<std::string,ceph::buffer::list>::iterator it;
+public:
+ OmapIteratorImpl(CollectionRef c, ObjectRef o)
+ : c(c), o(o), it(o->omap.begin()) {}
+
+ int seek_to_first() override {
+ std::lock_guard lock{o->omap_mutex};
+ it = o->omap.begin();
+ return 0;
+ }
+ int upper_bound(const std::string &after) override {
+ std::lock_guard lock{o->omap_mutex};
+ it = o->omap.upper_bound(after);
+ return 0;
+ }
+ int lower_bound(const std::string &to) override {
+ std::lock_guard lock{o->omap_mutex};
+ it = o->omap.lower_bound(to);
+ return 0;
+ }
+ bool valid() override {
+ std::lock_guard lock{o->omap_mutex};
+ return it != o->omap.end();
+ }
+ int next() override {
+ std::lock_guard lock{o->omap_mutex};
+ ++it;
+ return 0;
+ }
+ std::string key() override {
+ std::lock_guard lock{o->omap_mutex};
+ return it->first;
+ }
+ ceph::buffer::list value() override {
+ std::lock_guard lock{o->omap_mutex};
+ return it->second;
+ }
+ int status() override {
+ return 0;
+ }
+};
+
+ObjectMap::ObjectMapIterator MemStore::get_omap_iterator(
+ CollectionHandle& ch,
+ const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << ch->cid << " " << oid << dendl;
+ Collection *c = static_cast<Collection*>(ch.get());
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return ObjectMap::ObjectMapIterator();
+ return ObjectMap::ObjectMapIterator(new OmapIteratorImpl(c, o));
+}
+
+
+// ---------------
+// write operations
+
+int MemStore::queue_transactions(
+ CollectionHandle& ch,
+ std::vector<Transaction>& tls,
+ TrackedOpRef op,
+ ThreadPool::TPHandle *handle)
+{
+ // because memstore operations are synchronous, we can implement the
+ // Sequencer with a mutex. this guarantees ordering on a given sequencer,
+ // while allowing operations on different sequencers to happen in parallel
+ Collection *c = static_cast<Collection*>(ch.get());
+ std::unique_lock lock{c->sequencer_mutex};
+
+ for (auto p = tls.begin(); p != tls.end(); ++p) {
+ // poke the TPHandle heartbeat just to exercise that code path
+ if (handle)
+ handle->reset_tp_timeout();
+
+ _do_transaction(*p);
+ }
+
+ Context *on_apply = NULL, *on_apply_sync = NULL, *on_commit = NULL;
+ ObjectStore::Transaction::collect_contexts(tls, &on_apply, &on_commit,
+ &on_apply_sync);
+ if (on_apply_sync)
+ on_apply_sync->complete(0);
+ if (on_apply)
+ finisher.queue(on_apply);
+ if (on_commit)
+ finisher.queue(on_commit);
+ return 0;
+}
+
+void MemStore::_do_transaction(Transaction& t)
+{
+ Transaction::iterator i = t.begin();
+ int pos = 0;
+
+ while (i.have_op()) {
+ Transaction::Op *op = i.decode_op();
+ int r = 0;
+
+ switch (op->op) {
+ case Transaction::OP_NOP:
+ break;
+ case Transaction::OP_TOUCH:
+ case Transaction::OP_CREATE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _touch(cid, oid);
+ }
+ break;
+
+ case Transaction::OP_WRITE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ uint64_t off = op->off;
+ uint64_t len = op->len;
+ uint32_t fadvise_flags = i.get_fadvise_flags();
+ ceph::buffer::list bl;
+ i.decode_bl(bl);
+ r = _write(cid, oid, off, len, bl, fadvise_flags);
+ }
+ break;
+
+ case Transaction::OP_ZERO:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ uint64_t off = op->off;
+ uint64_t len = op->len;
+ r = _zero(cid, oid, off, len);
+ }
+ break;
+
+ case Transaction::OP_TRIMCACHE:
+ {
+ // deprecated, no-op
+ }
+ break;
+
+ case Transaction::OP_TRUNCATE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ uint64_t off = op->off;
+ r = _truncate(cid, oid, off);
+ }
+ break;
+
+ case Transaction::OP_REMOVE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _remove(cid, oid);
+ }
+ break;
+
+ case Transaction::OP_SETATTR:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ std::string name = i.decode_string();
+ ceph::buffer::list bl;
+ i.decode_bl(bl);
+ std::map<std::string, ceph::buffer::ptr> to_set;
+ to_set[name] = ceph::buffer::ptr(bl.c_str(), bl.length());
+ r = _setattrs(cid, oid, to_set);
+ }
+ break;
+
+ case Transaction::OP_SETATTRS:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ std::map<std::string, ceph::buffer::ptr> aset;
+ i.decode_attrset(aset);
+ r = _setattrs(cid, oid, aset);
+ }
+ break;
+
+ case Transaction::OP_RMATTR:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ std::string name = i.decode_string();
+ r = _rmattr(cid, oid, name.c_str());
+ }
+ break;
+
+ case Transaction::OP_RMATTRS:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _rmattrs(cid, oid);
+ }
+ break;
+
+ case Transaction::OP_CLONE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ghobject_t noid = i.get_oid(op->dest_oid);
+ r = _clone(cid, oid, noid);
+ }
+ break;
+
+ case Transaction::OP_CLONERANGE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ghobject_t noid = i.get_oid(op->dest_oid);
+ uint64_t off = op->off;
+ uint64_t len = op->len;
+ r = _clone_range(cid, oid, noid, off, len, off);
+ }
+ break;
+
+ case Transaction::OP_CLONERANGE2:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ghobject_t noid = i.get_oid(op->dest_oid);
+ uint64_t srcoff = op->off;
+ uint64_t len = op->len;
+ uint64_t dstoff = op->dest_off;
+ r = _clone_range(cid, oid, noid, srcoff, len, dstoff);
+ }
+ break;
+
+ case Transaction::OP_MKCOLL:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ r = _create_collection(cid, op->split_bits);
+ }
+ break;
+
+ case Transaction::OP_COLL_HINT:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ uint32_t type = op->hint;
+ ceph::buffer::list hint;
+ i.decode_bl(hint);
+ auto hiter = hint.cbegin();
+ if (type == Transaction::COLL_HINT_EXPECTED_NUM_OBJECTS) {
+ uint32_t pg_num;
+ uint64_t num_objs;
+ decode(pg_num, hiter);
+ decode(num_objs, hiter);
+ r = _collection_hint_expected_num_objs(cid, pg_num, num_objs);
+ } else {
+ // Ignore the hint
+ dout(10) << "Unrecognized collection hint type: " << type << dendl;
+ }
+ }
+ break;
+
+ case Transaction::OP_RMCOLL:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ r = _destroy_collection(cid);
+ }
+ break;
+
+ case Transaction::OP_COLL_ADD:
+ {
+ coll_t ocid = i.get_cid(op->cid);
+ coll_t ncid = i.get_cid(op->dest_cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _collection_add(ncid, ocid, oid);
+ }
+ break;
+
+ case Transaction::OP_COLL_REMOVE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _remove(cid, oid);
+ }
+ break;
+
+ case Transaction::OP_COLL_MOVE:
+ ceph_abort_msg("deprecated");
+ break;
+
+ case Transaction::OP_COLL_MOVE_RENAME:
+ {
+ coll_t oldcid = i.get_cid(op->cid);
+ ghobject_t oldoid = i.get_oid(op->oid);
+ coll_t newcid = i.get_cid(op->dest_cid);
+ ghobject_t newoid = i.get_oid(op->dest_oid);
+ r = _collection_move_rename(oldcid, oldoid, newcid, newoid);
+ if (r == -ENOENT)
+ r = 0;
+ }
+ break;
+
+ case Transaction::OP_TRY_RENAME:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oldoid = i.get_oid(op->oid);
+ ghobject_t newoid = i.get_oid(op->dest_oid);
+ r = _collection_move_rename(cid, oldoid, cid, newoid);
+ if (r == -ENOENT)
+ r = 0;
+ }
+ break;
+
+ case Transaction::OP_COLL_SETATTR:
+ {
+ ceph_abort_msg("not implemented");
+ }
+ break;
+
+ case Transaction::OP_COLL_RMATTR:
+ {
+ ceph_abort_msg("not implemented");
+ }
+ break;
+
+ case Transaction::OP_COLL_RENAME:
+ {
+ ceph_abort_msg("not implemented");
+ }
+ break;
+
+ case Transaction::OP_OMAP_CLEAR:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ r = _omap_clear(cid, oid);
+ }
+ break;
+ case Transaction::OP_OMAP_SETKEYS:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ceph::buffer::list aset_bl;
+ i.decode_attrset_bl(&aset_bl);
+ r = _omap_setkeys(cid, oid, aset_bl);
+ }
+ break;
+ case Transaction::OP_OMAP_RMKEYS:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ceph::buffer::list keys_bl;
+ i.decode_keyset_bl(&keys_bl);
+ r = _omap_rmkeys(cid, oid, keys_bl);
+ }
+ break;
+ case Transaction::OP_OMAP_RMKEYRANGE:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ std::string first, last;
+ first = i.decode_string();
+ last = i.decode_string();
+ r = _omap_rmkeyrange(cid, oid, first, last);
+ }
+ break;
+ case Transaction::OP_OMAP_SETHEADER:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ ghobject_t oid = i.get_oid(op->oid);
+ ceph::buffer::list bl;
+ i.decode_bl(bl);
+ r = _omap_setheader(cid, oid, bl);
+ }
+ break;
+ case Transaction::OP_SPLIT_COLLECTION:
+ ceph_abort_msg("deprecated");
+ break;
+ case Transaction::OP_SPLIT_COLLECTION2:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ uint32_t bits = op->split_bits;
+ uint32_t rem = op->split_rem;
+ coll_t dest = i.get_cid(op->dest_cid);
+ r = _split_collection(cid, bits, rem, dest);
+ }
+ break;
+ case Transaction::OP_MERGE_COLLECTION:
+ {
+ coll_t cid = i.get_cid(op->cid);
+ uint32_t bits = op->split_bits;
+ coll_t dest = i.get_cid(op->dest_cid);
+ r = _merge_collection(cid, bits, dest);
+ }
+ break;
+
+ case Transaction::OP_SETALLOCHINT:
+ {
+ r = 0;
+ }
+ break;
+
+ case Transaction::OP_COLL_SET_BITS:
+ {
+ r = 0;
+ }
+ break;
+
+ default:
+ derr << "bad op " << op->op << dendl;
+ ceph_abort();
+ }
+
+ if (r < 0) {
+ bool ok = false;
+
+ if (r == -ENOENT && !(op->op == Transaction::OP_CLONERANGE ||
+ op->op == Transaction::OP_CLONE ||
+ op->op == Transaction::OP_CLONERANGE2 ||
+ op->op == Transaction::OP_COLL_ADD))
+ // -ENOENT is usually okay
+ ok = true;
+ if (r == -ENODATA)
+ ok = true;
+
+ if (!ok) {
+ const char *msg = "unexpected error code";
+
+ if (r == -ENOENT && (op->op == Transaction::OP_CLONERANGE ||
+ op->op == Transaction::OP_CLONE ||
+ op->op == Transaction::OP_CLONERANGE2))
+ msg = "ENOENT on clone suggests osd bug";
+
+ if (r == -ENOSPC)
+ // For now, if we hit _any_ ENOSPC, crash, before we do any damage
+ // by partially applying transactions.
+ msg = "ENOSPC from MemStore, misconfigured cluster or insufficient memory";
+
+ if (r == -ENOTEMPTY) {
+ msg = "ENOTEMPTY suggests garbage data in osd data dir";
+ dump_all();
+ }
+
+ derr << " error " << cpp_strerror(r) << " not handled on operation " << op->op
+ << " (op " << pos << ", counting from 0)" << dendl;
+ dout(0) << msg << dendl;
+ dout(0) << " transaction dump:\n";
+ ceph::JSONFormatter f(true);
+ f.open_object_section("transaction");
+ t.dump(&f);
+ f.close_section();
+ f.flush(*_dout);
+ *_dout << dendl;
+ ceph_abort_msg("unexpected error");
+ }
+ }
+
+ ++pos;
+ }
+}
+
+int MemStore::_touch(const coll_t& cid, const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ c->get_or_create_object(oid);
+ return 0;
+}
+
+int MemStore::_write(const coll_t& cid, const ghobject_t& oid,
+ uint64_t offset, size_t len, const ceph::buffer::list& bl,
+ uint32_t fadvise_flags)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << " "
+ << offset << "~" << len << dendl;
+ ceph_assert(len == bl.length());
+
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_or_create_object(oid);
+ if (len > 0 && !cct->_conf->memstore_debug_omit_block_device_write) {
+ const ssize_t old_size = o->get_size();
+ o->write(offset, bl);
+ used_bytes += (o->get_size() - old_size);
+ }
+
+ return 0;
+}
+
+int MemStore::_zero(const coll_t& cid, const ghobject_t& oid,
+ uint64_t offset, size_t len)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << " " << offset << "~"
+ << len << dendl;
+ ceph::buffer::list bl;
+ bl.append_zero(len);
+ return _write(cid, oid, offset, len, bl);
+}
+
+int MemStore::_truncate(const coll_t& cid, const ghobject_t& oid, uint64_t size)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << " " << size << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ if (cct->_conf->memstore_debug_omit_block_device_write)
+ return 0;
+ const ssize_t old_size = o->get_size();
+ int r = o->truncate(size);
+ used_bytes += (o->get_size() - old_size);
+ return r;
+}
+
+int MemStore::_remove(const coll_t& cid, const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+ std::lock_guard l{c->lock};
+
+ auto i = c->object_hash.find(oid);
+ if (i == c->object_hash.end())
+ return -ENOENT;
+ used_bytes -= i->second->get_size();
+ c->object_hash.erase(i);
+ c->object_map.erase(oid);
+
+ return 0;
+}
+
+int MemStore::_setattrs(const coll_t& cid, const ghobject_t& oid,
+ std::map<std::string,ceph::buffer::ptr>& aset)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->xattr_mutex};
+ for (auto p = aset.begin(); p != aset.end(); ++p)
+ o->xattr[p->first] = p->second;
+ return 0;
+}
+
+int MemStore::_rmattr(const coll_t& cid, const ghobject_t& oid, const char *name)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << " " << name << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->xattr_mutex};
+ auto i = o->xattr.find(name);
+ if (i == o->xattr.end())
+ return -ENODATA;
+ o->xattr.erase(i);
+ return 0;
+}
+
+int MemStore::_rmattrs(const coll_t& cid, const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->xattr_mutex};
+ o->xattr.clear();
+ return 0;
+}
+
+int MemStore::_clone(const coll_t& cid, const ghobject_t& oldoid,
+ const ghobject_t& newoid)
+{
+ dout(10) << __func__ << " " << cid << " " << oldoid
+ << " -> " << newoid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef oo = c->get_object(oldoid);
+ if (!oo)
+ return -ENOENT;
+ ObjectRef no = c->get_or_create_object(newoid);
+ used_bytes += oo->get_size() - no->get_size();
+ no->clone(oo.get(), 0, oo->get_size(), 0);
+
+ // take xattr and omap locks with std::lock()
+ std::scoped_lock l{oo->xattr_mutex,
+ no->xattr_mutex,
+ oo->omap_mutex,
+ no->omap_mutex};
+
+ no->omap_header = oo->omap_header;
+ no->omap = oo->omap;
+ no->xattr = oo->xattr;
+ return 0;
+}
+
+int MemStore::_clone_range(const coll_t& cid, const ghobject_t& oldoid,
+ const ghobject_t& newoid,
+ uint64_t srcoff, uint64_t len, uint64_t dstoff)
+{
+ dout(10) << __func__ << " " << cid << " "
+ << oldoid << " " << srcoff << "~" << len << " -> "
+ << newoid << " " << dstoff << "~" << len
+ << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef oo = c->get_object(oldoid);
+ if (!oo)
+ return -ENOENT;
+ ObjectRef no = c->get_or_create_object(newoid);
+ if (srcoff >= oo->get_size())
+ return 0;
+ if (srcoff + len >= oo->get_size())
+ len = oo->get_size() - srcoff;
+
+ const ssize_t old_size = no->get_size();
+ no->clone(oo.get(), srcoff, len, dstoff);
+ used_bytes += (no->get_size() - old_size);
+
+ return len;
+}
+
+int MemStore::_omap_clear(const coll_t& cid, const ghobject_t &oid)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ o->omap.clear();
+ o->omap_header.clear();
+ return 0;
+}
+
+int MemStore::_omap_setkeys(const coll_t& cid, const ghobject_t &oid,
+ ceph::buffer::list& aset_bl)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ auto p = aset_bl.cbegin();
+ __u32 num;
+ decode(num, p);
+ while (num--) {
+ std::string key;
+ decode(key, p);
+ decode(o->omap[key], p);
+ }
+ return 0;
+}
+
+int MemStore::_omap_rmkeys(const coll_t& cid, const ghobject_t &oid,
+ ceph::buffer::list& keys_bl)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ auto p = keys_bl.cbegin();
+ __u32 num;
+ decode(num, p);
+ while (num--) {
+ std::string key;
+ decode(key, p);
+ o->omap.erase(key);
+ }
+ return 0;
+}
+
+int MemStore::_omap_rmkeyrange(const coll_t& cid, const ghobject_t &oid,
+ const std::string& first, const std::string& last)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << " " << first
+ << " " << last << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ auto p = o->omap.lower_bound(first);
+ auto e = o->omap.lower_bound(last);
+ o->omap.erase(p, e);
+ return 0;
+}
+
+int MemStore::_omap_setheader(const coll_t& cid, const ghobject_t &oid,
+ const ceph::buffer::list &bl)
+{
+ dout(10) << __func__ << " " << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+
+ ObjectRef o = c->get_object(oid);
+ if (!o)
+ return -ENOENT;
+ std::lock_guard lock{o->omap_mutex};
+ o->omap_header = bl;
+ return 0;
+}
+
+int MemStore::_create_collection(const coll_t& cid, int bits)
+{
+ dout(10) << __func__ << " " << cid << dendl;
+ std::lock_guard l{coll_lock};
+ auto result = coll_map.insert(std::make_pair(cid, CollectionRef()));
+ if (!result.second)
+ return -EEXIST;
+ auto p = new_coll_map.find(cid);
+ ceph_assert(p != new_coll_map.end());
+ result.first->second = p->second;
+ result.first->second->bits = bits;
+ new_coll_map.erase(p);
+ return 0;
+}
+
+int MemStore::_destroy_collection(const coll_t& cid)
+{
+ dout(10) << __func__ << " " << cid << dendl;
+ std::lock_guard l{coll_lock};
+ ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid);
+ if (cp == coll_map.end())
+ return -ENOENT;
+ {
+ std::shared_lock l2{cp->second->lock};
+ if (!cp->second->object_map.empty())
+ return -ENOTEMPTY;
+ cp->second->exists = false;
+ }
+ used_bytes -= cp->second->used_bytes();
+ coll_map.erase(cp);
+ return 0;
+}
+
+int MemStore::_collection_add(const coll_t& cid, const coll_t& ocid, const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << cid << " " << ocid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+ CollectionRef oc = get_collection(ocid);
+ if (!oc)
+ return -ENOENT;
+
+ std::scoped_lock l{std::min(&(*c), &(*oc))->lock,
+ std::max(&(*c), &(*oc))->lock};
+
+ if (c->object_hash.count(oid))
+ return -EEXIST;
+ if (oc->object_hash.count(oid) == 0)
+ return -ENOENT;
+ ObjectRef o = oc->object_hash[oid];
+ c->object_map[oid] = o;
+ c->object_hash[oid] = o;
+ return 0;
+}
+
+int MemStore::_collection_move_rename(const coll_t& oldcid, const ghobject_t& oldoid,
+ coll_t cid, const ghobject_t& oid)
+{
+ dout(10) << __func__ << " " << oldcid << " " << oldoid << " -> "
+ << cid << " " << oid << dendl;
+ CollectionRef c = get_collection(cid);
+ if (!c)
+ return -ENOENT;
+ CollectionRef oc = get_collection(oldcid);
+ if (!oc)
+ return -ENOENT;
+
+ // note: c and oc may be the same
+ ceph_assert(&(*c) == &(*oc));
+
+ std::lock_guard l{c->lock};
+ if (c->object_hash.count(oid))
+ return -EEXIST;
+ if (oc->object_hash.count(oldoid) == 0)
+ return -ENOENT;
+ {
+ ObjectRef o = oc->object_hash[oldoid];
+ c->object_map[oid] = o;
+ c->object_hash[oid] = o;
+ oc->object_map.erase(oldoid);
+ oc->object_hash.erase(oldoid);
+ }
+ return 0;
+}
+
+int MemStore::_split_collection(const coll_t& cid, uint32_t bits, uint32_t match,
+ coll_t dest)
+{
+ dout(10) << __func__ << " " << cid << " " << bits << " " << match << " "
+ << dest << dendl;
+ CollectionRef sc = get_collection(cid);
+ if (!sc)
+ return -ENOENT;
+ CollectionRef dc = get_collection(dest);
+ if (!dc)
+ return -ENOENT;
+
+ std::scoped_lock l{std::min(&(*sc), &(*dc))->lock,
+ std::max(&(*sc), &(*dc))->lock};
+
+ auto p = sc->object_map.begin();
+ while (p != sc->object_map.end()) {
+ if (p->first.match(bits, match)) {
+ dout(20) << " moving " << p->first << dendl;
+ dc->object_map.insert(std::make_pair(p->first, p->second));
+ dc->object_hash.insert(std::make_pair(p->first, p->second));
+ sc->object_hash.erase(p->first);
+ sc->object_map.erase(p++);
+ } else {
+ ++p;
+ }
+ }
+
+ sc->bits = bits;
+ ceph_assert(dc->bits == (int)bits);
+
+ return 0;
+}
+
+int MemStore::_merge_collection(const coll_t& cid, uint32_t bits, coll_t dest)
+{
+ dout(10) << __func__ << " " << cid << " " << bits << " "
+ << dest << dendl;
+ CollectionRef sc = get_collection(cid);
+ if (!sc)
+ return -ENOENT;
+ CollectionRef dc = get_collection(dest);
+ if (!dc)
+ return -ENOENT;
+ {
+ std::scoped_lock l{std::min(&(*sc), &(*dc))->lock,
+ std::max(&(*sc), &(*dc))->lock};
+
+ auto p = sc->object_map.begin();
+ while (p != sc->object_map.end()) {
+ dout(20) << " moving " << p->first << dendl;
+ dc->object_map.insert(std::make_pair(p->first, p->second));
+ dc->object_hash.insert(std::make_pair(p->first, p->second));
+ sc->object_hash.erase(p->first);
+ sc->object_map.erase(p++);
+ }
+
+ dc->bits = bits;
+ }
+
+ {
+ std::lock_guard l{coll_lock};
+ ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid);
+ ceph_assert(cp != coll_map.end());
+ used_bytes -= cp->second->used_bytes();
+ coll_map.erase(cp);
+ }
+
+ return 0;
+}
+
+namespace {
+struct BufferlistObject : public MemStore::Object {
+ ceph::spinlock mutex;
+ ceph::buffer::list data;
+
+ size_t get_size() const override { return data.length(); }
+
+ int read(uint64_t offset, uint64_t len, ceph::buffer::list &bl) override;
+ int write(uint64_t offset, const ceph::buffer::list &bl) override;
+ int clone(Object *src, uint64_t srcoff, uint64_t len,
+ uint64_t dstoff) override;
+ int truncate(uint64_t offset) override;
+
+ void encode(ceph::buffer::list& bl) const override {
+ ENCODE_START(1, 1, bl);
+ encode(data, bl);
+ encode_base(bl);
+ ENCODE_FINISH(bl);
+ }
+ void decode(ceph::buffer::list::const_iterator& p) override {
+ DECODE_START(1, p);
+ decode(data, p);
+ decode_base(p);
+ DECODE_FINISH(p);
+ }
+};
+}
+// BufferlistObject
+int BufferlistObject::read(uint64_t offset, uint64_t len,
+ ceph::buffer::list &bl)
+{
+ std::lock_guard<decltype(mutex)> lock(mutex);
+ bl.substr_of(data, offset, len);
+ return bl.length();
+}
+
+int BufferlistObject::write(uint64_t offset, const ceph::buffer::list &src)
+{
+ unsigned len = src.length();
+
+ std::lock_guard<decltype(mutex)> lock(mutex);
+
+ // before
+ ceph::buffer::list newdata;
+ if (get_size() >= offset) {
+ newdata.substr_of(data, 0, offset);
+ } else {
+ if (get_size()) {
+ newdata.substr_of(data, 0, get_size());
+ }
+ newdata.append_zero(offset - get_size());
+ }
+
+ newdata.append(src);
+
+ // after
+ if (get_size() > offset + len) {
+ ceph::buffer::list tail;
+ tail.substr_of(data, offset + len, get_size() - (offset + len));
+ newdata.append(tail);
+ }
+
+ data = std::move(newdata);
+ return 0;
+}
+
+int BufferlistObject::clone(Object *src, uint64_t srcoff,
+ uint64_t len, uint64_t dstoff)
+{
+ auto srcbl = dynamic_cast<BufferlistObject*>(src);
+ if (srcbl == nullptr)
+ return -ENOTSUP;
+
+ ceph::buffer::list bl;
+ {
+ std::lock_guard<decltype(srcbl->mutex)> lock(srcbl->mutex);
+ if (srcoff == dstoff && len == src->get_size()) {
+ data = srcbl->data;
+ return 0;
+ }
+ bl.substr_of(srcbl->data, srcoff, len);
+ }
+ return write(dstoff, bl);
+}
+
+int BufferlistObject::truncate(uint64_t size)
+{
+ std::lock_guard<decltype(mutex)> lock(mutex);
+ if (get_size() > size) {
+ ceph::buffer::list bl;
+ bl.substr_of(data, 0, size);
+ data = std::move(bl);
+ } else if (get_size() == size) {
+ // do nothing
+ } else {
+ data.append_zero(size - get_size());
+ }
+ return 0;
+}
+
+// PageSetObject
+
+struct MemStore::PageSetObject : public Object {
+ PageSet data;
+ uint64_t data_len;
+#if defined(__GLIBCXX__)
+ // use a thread-local vector for the pages returned by PageSet, so we
+ // can avoid allocations in read/write()
+ static thread_local PageSet::page_vector tls_pages;
+#endif
+
+ size_t get_size() const override { return data_len; }
+
+ int read(uint64_t offset, uint64_t len, ceph::buffer::list &bl) override;
+ int write(uint64_t offset, const ceph::buffer::list &bl) override;
+ int clone(Object *src, uint64_t srcoff, uint64_t len,
+ uint64_t dstoff) override;
+ int truncate(uint64_t offset) override;
+
+ void encode(ceph::buffer::list& bl) const override {
+ ENCODE_START(1, 1, bl);
+ encode(data_len, bl);
+ data.encode(bl);
+ encode_base(bl);
+ ENCODE_FINISH(bl);
+ }
+ void decode(ceph::buffer::list::const_iterator& p) override {
+ DECODE_START(1, p);
+ decode(data_len, p);
+ data.decode(p);
+ decode_base(p);
+ DECODE_FINISH(p);
+ }
+
+private:
+ FRIEND_MAKE_REF(PageSetObject);
+ explicit PageSetObject(size_t page_size) : data(page_size), data_len(0) {}
+};
+
+#if defined(__GLIBCXX__)
+// use a thread-local vector for the pages returned by PageSet, so we
+// can avoid allocations in read/write()
+thread_local PageSet::page_vector MemStore::PageSetObject::tls_pages;
+#define DEFINE_PAGE_VECTOR(name)
+#else
+#define DEFINE_PAGE_VECTOR(name) PageSet::page_vector name;
+#endif
+
+int MemStore::PageSetObject::read(uint64_t offset, uint64_t len, ceph::buffer::list& bl)
+{
+ const auto start = offset;
+ const auto end = offset + len;
+ auto remaining = len;
+
+ DEFINE_PAGE_VECTOR(tls_pages);
+ data.get_range(offset, len, tls_pages);
+
+ // allocate a buffer for the data
+ ceph::buffer::ptr buf(len);
+
+ auto p = tls_pages.begin();
+ while (remaining) {
+ // no more pages in range
+ if (p == tls_pages.end() || (*p)->offset >= end) {
+ buf.zero(offset - start, remaining);
+ break;
+ }
+ auto page = *p;
+
+ // fill any holes between pages with zeroes
+ if (page->offset > offset) {
+ const auto count = std::min(remaining, page->offset - offset);
+ buf.zero(offset - start, count);
+ remaining -= count;
+ offset = page->offset;
+ if (!remaining)
+ break;
+ }
+
+ // read from page
+ const auto page_offset = offset - page->offset;
+ const auto count = std::min(remaining, data.get_page_size() - page_offset);
+
+ buf.copy_in(offset - start, count, page->data + page_offset);
+
+ remaining -= count;
+ offset += count;
+
+ ++p;
+ }
+
+ tls_pages.clear(); // drop page refs
+
+ bl.append(std::move(buf));
+ return len;
+}
+
+int MemStore::PageSetObject::write(uint64_t offset, const ceph::buffer::list &src)
+{
+ unsigned len = src.length();
+
+ DEFINE_PAGE_VECTOR(tls_pages);
+ // make sure the page range is allocated
+ data.alloc_range(offset, src.length(), tls_pages);
+
+ auto page = tls_pages.begin();
+
+ auto p = src.begin();
+ while (len > 0) {
+ unsigned page_offset = offset - (*page)->offset;
+ unsigned pageoff = data.get_page_size() - page_offset;
+ unsigned count = std::min(len, pageoff);
+ p.copy(count, (*page)->data + page_offset);
+ offset += count;
+ len -= count;
+ if (count == pageoff)
+ ++page;
+ }
+ if (data_len < offset)
+ data_len = offset;
+ tls_pages.clear(); // drop page refs
+ return 0;
+}
+
+int MemStore::PageSetObject::clone(Object *src, uint64_t srcoff,
+ uint64_t len, uint64_t dstoff)
+{
+ const int64_t delta = dstoff - srcoff;
+
+ auto &src_data = static_cast<PageSetObject*>(src)->data;
+ const uint64_t src_page_size = src_data.get_page_size();
+
+ auto &dst_data = data;
+ const auto dst_page_size = dst_data.get_page_size();
+
+ DEFINE_PAGE_VECTOR(tls_pages);
+ PageSet::page_vector dst_pages;
+
+ while (len) {
+ // limit to 16 pages at a time so tls_pages doesn't balloon in size
+ auto count = std::min(len, (uint64_t)src_page_size * 16);
+ src_data.get_range(srcoff, count, tls_pages);
+
+ // allocate the destination range
+ // TODO: avoid allocating pages for holes in the source range
+ dst_data.alloc_range(srcoff + delta, count, dst_pages);
+ auto dst_iter = dst_pages.begin();
+
+ for (auto &src_page : tls_pages) {
+ auto sbegin = std::max(srcoff, src_page->offset);
+ auto send = std::min(srcoff + count, src_page->offset + src_page_size);
+
+ // zero-fill holes before src_page
+ if (srcoff < sbegin) {
+ while (dst_iter != dst_pages.end()) {
+ auto &dst_page = *dst_iter;
+ auto dbegin = std::max(srcoff + delta, dst_page->offset);
+ auto dend = std::min(sbegin + delta, dst_page->offset + dst_page_size);
+ std::fill(dst_page->data + dbegin - dst_page->offset,
+ dst_page->data + dend - dst_page->offset, 0);
+ if (dend < dst_page->offset + dst_page_size)
+ break;
+ ++dst_iter;
+ }
+ const auto c = sbegin - srcoff;
+ count -= c;
+ len -= c;
+ }
+
+ // copy data from src page to dst pages
+ while (dst_iter != dst_pages.end()) {
+ auto &dst_page = *dst_iter;
+ auto dbegin = std::max(sbegin + delta, dst_page->offset);
+ auto dend = std::min(send + delta, dst_page->offset + dst_page_size);
+
+ std::copy(src_page->data + (dbegin - delta) - src_page->offset,
+ src_page->data + (dend - delta) - src_page->offset,
+ dst_page->data + dbegin - dst_page->offset);
+ if (dend < dst_page->offset + dst_page_size)
+ break;
+ ++dst_iter;
+ }
+
+ const auto c = send - sbegin;
+ count -= c;
+ len -= c;
+ srcoff = send;
+ dstoff = send + delta;
+ }
+ tls_pages.clear(); // drop page refs
+
+ // zero-fill holes after the last src_page
+ if (count > 0) {
+ while (dst_iter != dst_pages.end()) {
+ auto &dst_page = *dst_iter;
+ auto dbegin = std::max(dstoff, dst_page->offset);
+ auto dend = std::min(dstoff + count, dst_page->offset + dst_page_size);
+ std::fill(dst_page->data + dbegin - dst_page->offset,
+ dst_page->data + dend - dst_page->offset, 0);
+ ++dst_iter;
+ }
+ srcoff += count;
+ dstoff += count;
+ len -= count;
+ }
+ dst_pages.clear(); // drop page refs
+ }
+
+ // update object size
+ if (data_len < dstoff)
+ data_len = dstoff;
+ return 0;
+}
+
+int MemStore::PageSetObject::truncate(uint64_t size)
+{
+ data.free_pages_after(size);
+ data_len = size;
+
+ const auto page_size = data.get_page_size();
+ const auto page_offset = size & ~(page_size-1);
+ if (page_offset == size)
+ return 0;
+
+ DEFINE_PAGE_VECTOR(tls_pages);
+ // write zeroes to the rest of the last page
+ data.get_range(page_offset, page_size, tls_pages);
+ if (tls_pages.empty())
+ return 0;
+
+ auto page = tls_pages.begin();
+ auto data = (*page)->data;
+ std::fill(data + (size - page_offset), data + page_size, 0);
+ tls_pages.clear(); // drop page ref
+ return 0;
+}
+
+
+MemStore::ObjectRef MemStore::Collection::create_object() const {
+ if (use_page_set)
+ return ceph::make_ref<PageSetObject>(cct->_conf->memstore_page_size);
+ return new BufferlistObject();
+}
diff --git a/src/os/memstore/MemStore.h b/src/os/memstore/MemStore.h
new file mode 100644
index 000000000..04c3e08d0
--- /dev/null
+++ b/src/os/memstore/MemStore.h
@@ -0,0 +1,406 @@
+// -*- 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) 2013- Sage Weil <sage@inktank.com>
+ *
+ * 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.
+ *
+ */
+
+
+#ifndef CEPH_MEMSTORE_H
+#define CEPH_MEMSTORE_H
+
+#include <mutex>
+#include <boost/intrusive_ptr.hpp>
+
+#include "include/unordered_map.h"
+#include "common/Finisher.h"
+#include "common/RefCountedObj.h"
+#include "common/RWLock.h"
+#include "os/ObjectStore.h"
+#include "PageSet.h"
+#include "include/ceph_assert.h"
+
+class MemStore : public ObjectStore {
+public:
+ struct Object : public RefCountedObject {
+ ceph::mutex xattr_mutex{ceph::make_mutex("MemStore::Object::xattr_mutex")};
+ ceph::mutex omap_mutex{ceph::make_mutex("MemStore::Object::omap_mutex")};
+ std::map<std::string,ceph::buffer::ptr> xattr;
+ ceph::buffer::list omap_header;
+ std::map<std::string,ceph::buffer::list> omap;
+
+ using Ref = ceph::ref_t<Object>;
+
+ // interface for object data
+ virtual size_t get_size() const = 0;
+ virtual int read(uint64_t offset, uint64_t len, ceph::buffer::list &bl) = 0;
+ virtual int write(uint64_t offset, const ceph::buffer::list &bl) = 0;
+ virtual int clone(Object *src, uint64_t srcoff, uint64_t len,
+ uint64_t dstoff) = 0;
+ virtual int truncate(uint64_t offset) = 0;
+ virtual void encode(ceph::buffer::list& bl) const = 0;
+ virtual void decode(ceph::buffer::list::const_iterator& p) = 0;
+
+ void encode_base(ceph::buffer::list& bl) const {
+ using ceph::encode;
+ encode(xattr, bl);
+ encode(omap_header, bl);
+ encode(omap, bl);
+ }
+ void decode_base(ceph::buffer::list::const_iterator& p) {
+ using ceph::decode;
+ decode(xattr, p);
+ decode(omap_header, p);
+ decode(omap, p);
+ }
+
+ void dump(ceph::Formatter *f) const {
+ f->dump_int("data_len", get_size());
+ f->dump_int("omap_header_len", omap_header.length());
+
+ f->open_array_section("xattrs");
+ for (auto p = xattr.begin(); p != xattr.end(); ++p) {
+ f->open_object_section("xattr");
+ f->dump_string("name", p->first);
+ f->dump_int("length", p->second.length());
+ f->close_section();
+ }
+ f->close_section();
+
+ f->open_array_section("omap");
+ for (auto p = omap.begin(); p != omap.end(); ++p) {
+ f->open_object_section("pair");
+ f->dump_string("key", p->first);
+ f->dump_int("length", p->second.length());
+ f->close_section();
+ }
+ f->close_section();
+ }
+ protected:
+ Object() = default;
+ };
+ using ObjectRef = Object::Ref;
+
+ struct PageSetObject;
+ struct Collection : public CollectionImpl {
+ int bits = 0;
+ CephContext *cct;
+ bool use_page_set;
+ ceph::unordered_map<ghobject_t, ObjectRef> object_hash; ///< for lookup
+ std::map<ghobject_t, ObjectRef> object_map; ///< for iteration
+ std::map<std::string,ceph::buffer::ptr> xattr;
+ /// for object_{map,hash}
+ ceph::shared_mutex lock{
+ ceph::make_shared_mutex("MemStore::Collection::lock", true, false)};
+
+ bool exists = true;
+ ceph::mutex sequencer_mutex{
+ ceph::make_mutex("MemStore::Collection::sequencer_mutex")};
+
+ typedef boost::intrusive_ptr<Collection> Ref;
+
+ ObjectRef create_object() const;
+
+ // NOTE: The lock only needs to protect the object_map/hash, not the
+ // contents of individual objects. The osd is already sequencing
+ // reads and writes, so we will never see them concurrently at this
+ // level.
+
+ ObjectRef get_object(ghobject_t oid) {
+ std::shared_lock l{lock};
+ auto o = object_hash.find(oid);
+ if (o == object_hash.end())
+ return ObjectRef();
+ return o->second;
+ }
+
+ ObjectRef get_or_create_object(ghobject_t oid) {
+ std::lock_guard l{lock};
+ auto result = object_hash.emplace(oid, ObjectRef());
+ if (result.second)
+ object_map[oid] = result.first->second = create_object();
+ return result.first->second;
+ }
+
+ void encode(ceph::buffer::list& bl) const {
+ ENCODE_START(1, 1, bl);
+ encode(xattr, bl);
+ encode(use_page_set, bl);
+ uint32_t s = object_map.size();
+ encode(s, bl);
+ for (auto p = object_map.begin(); p != object_map.end(); ++p) {
+ encode(p->first, bl);
+ p->second->encode(bl);
+ }
+ ENCODE_FINISH(bl);
+ }
+ void decode(ceph::buffer::list::const_iterator& p) {
+ DECODE_START(1, p);
+ decode(xattr, p);
+ decode(use_page_set, p);
+ uint32_t s;
+ decode(s, p);
+ while (s--) {
+ ghobject_t k;
+ decode(k, p);
+ auto o = create_object();
+ o->decode(p);
+ object_map.insert(std::make_pair(k, o));
+ object_hash.insert(std::make_pair(k, o));
+ }
+ DECODE_FINISH(p);
+ }
+
+ uint64_t used_bytes() const {
+ uint64_t result = 0;
+ for (auto p = object_map.begin(); p != object_map.end(); ++p) {
+ result += p->second->get_size();
+ }
+
+ return result;
+ }
+
+ void flush() override {
+ }
+ bool flush_commit(Context *c) override {
+ return true;
+ }
+
+ private:
+ FRIEND_MAKE_REF(Collection);
+ explicit Collection(CephContext *cct, coll_t c)
+ : CollectionImpl(cct, c),
+ cct(cct),
+ use_page_set(cct->_conf->memstore_page_set) {}
+ };
+ typedef Collection::Ref CollectionRef;
+
+private:
+ class OmapIteratorImpl;
+
+
+ ceph::unordered_map<coll_t, CollectionRef> coll_map;
+ /// rwlock to protect coll_map
+ ceph::shared_mutex coll_lock{
+ ceph::make_shared_mutex("MemStore::coll_lock")};
+ std::map<coll_t,CollectionRef> new_coll_map;
+
+ CollectionRef get_collection(const coll_t& cid);
+
+ Finisher finisher;
+
+ uint64_t used_bytes;
+
+ void _do_transaction(Transaction& t);
+
+ int _touch(const coll_t& cid, const ghobject_t& oid);
+ int _write(const coll_t& cid, const ghobject_t& oid, uint64_t offset, size_t len,
+ const ceph::buffer::list& bl, uint32_t fadvise_flags = 0);
+ int _zero(const coll_t& cid, const ghobject_t& oid, uint64_t offset, size_t len);
+ int _truncate(const coll_t& cid, const ghobject_t& oid, uint64_t size);
+ int _remove(const coll_t& cid, const ghobject_t& oid);
+ int _setattrs(const coll_t& cid, const ghobject_t& oid, std::map<std::string,ceph::buffer::ptr>& aset);
+ int _rmattr(const coll_t& cid, const ghobject_t& oid, const char *name);
+ int _rmattrs(const coll_t& cid, const ghobject_t& oid);
+ int _clone(const coll_t& cid, const ghobject_t& oldoid, const ghobject_t& newoid);
+ int _clone_range(const coll_t& cid, const ghobject_t& oldoid,
+ const ghobject_t& newoid,
+ uint64_t srcoff, uint64_t len, uint64_t dstoff);
+ int _omap_clear(const coll_t& cid, const ghobject_t &oid);
+ int _omap_setkeys(const coll_t& cid, const ghobject_t &oid, ceph::buffer::list& aset_bl);
+ int _omap_rmkeys(const coll_t& cid, const ghobject_t &oid, ceph::buffer::list& keys_bl);
+ int _omap_rmkeyrange(const coll_t& cid, const ghobject_t &oid,
+ const std::string& first, const std::string& last);
+ int _omap_setheader(const coll_t& cid, const ghobject_t &oid, const ceph::buffer::list &bl);
+
+ int _collection_hint_expected_num_objs(const coll_t& cid, uint32_t pg_num,
+ uint64_t num_objs) const { return 0; }
+ int _create_collection(const coll_t& c, int bits);
+ int _destroy_collection(const coll_t& c);
+ int _collection_add(const coll_t& cid, const coll_t& ocid, const ghobject_t& oid);
+ int _collection_move_rename(const coll_t& oldcid, const ghobject_t& oldoid,
+ coll_t cid, const ghobject_t& o);
+ int _split_collection(const coll_t& cid, uint32_t bits, uint32_t rem, coll_t dest);
+ int _merge_collection(const coll_t& cid, uint32_t bits, coll_t dest);
+
+ int _save();
+ int _load();
+
+ void dump(ceph::Formatter *f);
+ void dump_all();
+
+public:
+ MemStore(CephContext *cct, const std::string& path)
+ : ObjectStore(cct, path),
+ finisher(cct),
+ used_bytes(0) {}
+ ~MemStore() override { }
+
+ std::string get_type() override {
+ return "memstore";
+ }
+
+ bool test_mount_in_use() override {
+ return false;
+ }
+
+ int mount() override;
+ int umount() override;
+
+ int fsck(bool deep) override {
+ return 0;
+ }
+
+ int validate_hobject_key(const hobject_t &obj) const override {
+ return 0;
+ }
+ unsigned get_max_attr_name_length() override {
+ return 256; // arbitrary; there is no real limit internally
+ }
+
+ int mkfs() override;
+ int mkjournal() override {
+ return 0;
+ }
+ bool wants_journal() override {
+ return false;
+ }
+ bool allows_journal() override {
+ return false;
+ }
+ bool needs_journal() override {
+ return false;
+ }
+
+ int get_devices(std::set<std::string> *ls) override {
+ // no devices for us!
+ return 0;
+ }
+
+ int statfs(struct store_statfs_t *buf,
+ osd_alert_list_t* alerts = nullptr) override;
+ int pool_statfs(uint64_t pool_id, struct store_statfs_t *buf,
+ bool *per_pool_omap) override;
+
+ bool exists(CollectionHandle &c, const ghobject_t& oid) override;
+ int stat(CollectionHandle &c, const ghobject_t& oid,
+ struct stat *st, bool allow_eio = false) override;
+ int set_collection_opts(
+ CollectionHandle& c,
+ const pool_opts_t& opts) override;
+ int read(
+ CollectionHandle &c,
+ const ghobject_t& oid,
+ uint64_t offset,
+ size_t len,
+ ceph::buffer::list& bl,
+ uint32_t op_flags = 0) override;
+ using ObjectStore::fiemap;
+ int fiemap(CollectionHandle& c, const ghobject_t& oid,
+ uint64_t offset, size_t len, ceph::buffer::list& bl) override;
+ int fiemap(CollectionHandle& c, const ghobject_t& oid, uint64_t offset,
+ size_t len, std::map<uint64_t, uint64_t>& destmap) override;
+ int getattr(CollectionHandle &c, const ghobject_t& oid, const char *name,
+ ceph::buffer::ptr& value) override;
+ int getattrs(CollectionHandle &c, const ghobject_t& oid,
+ std::map<std::string,ceph::buffer::ptr>& aset) override;
+
+ int list_collections(std::vector<coll_t>& ls) override;
+
+ CollectionHandle open_collection(const coll_t& c) override {
+ return get_collection(c);
+ }
+ CollectionHandle create_new_collection(const coll_t& c) override;
+
+ void set_collection_commit_queue(const coll_t& cid,
+ ContextQueue *commit_queue) override {
+ }
+
+ bool collection_exists(const coll_t& c) override;
+ int collection_empty(CollectionHandle& c, bool *empty) override;
+ int collection_bits(CollectionHandle& c) override;
+ int collection_list(CollectionHandle& cid,
+ const ghobject_t& start, const ghobject_t& end, int max,
+ std::vector<ghobject_t> *ls, ghobject_t *next) override;
+
+ using ObjectStore::omap_get;
+ int omap_get(
+ CollectionHandle& c, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ ceph::buffer::list *header, ///< [out] omap header
+ std::map<std::string, ceph::buffer::list> *out /// < [out] Key to value map
+ ) override;
+
+ using ObjectStore::omap_get_header;
+ /// Get omap header
+ int omap_get_header(
+ CollectionHandle& c, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ ceph::buffer::list *header, ///< [out] omap header
+ bool allow_eio = false ///< [in] don't assert on eio
+ ) override;
+
+ using ObjectStore::omap_get_keys;
+ /// Get keys defined on oid
+ int omap_get_keys(
+ CollectionHandle& c, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ std::set<std::string> *keys ///< [out] Keys defined on oid
+ ) override;
+
+ using ObjectStore::omap_get_values;
+ /// Get key values
+ int omap_get_values(
+ CollectionHandle& c, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ const std::set<std::string> &keys, ///< [in] Keys to get
+ std::map<std::string, ceph::buffer::list> *out ///< [out] Returned keys and values
+ ) override;
+
+ using ObjectStore::omap_check_keys;
+ /// Filters keys into out which are defined on oid
+ int omap_check_keys(
+ CollectionHandle& c, ///< [in] Collection containing oid
+ const ghobject_t &oid, ///< [in] Object containing omap
+ const std::set<std::string> &keys, ///< [in] Keys to check
+ std::set<std::string> *out ///< [out] Subset of keys defined on oid
+ ) override;
+
+ using ObjectStore::get_omap_iterator;
+ ObjectMap::ObjectMapIterator get_omap_iterator(
+ CollectionHandle& c, ///< [in] collection
+ const ghobject_t &oid ///< [in] object
+ ) override;
+
+ void set_fsid(uuid_d u) override;
+ uuid_d get_fsid() override;
+
+ uint64_t estimate_objects_overhead(uint64_t num_objects) override {
+ return 0; //do not care
+ }
+
+ objectstore_perf_stat_t get_cur_stats() override;
+
+ const PerfCounters* get_perf_counters() const override {
+ return nullptr;
+ }
+
+
+ int queue_transactions(
+ CollectionHandle& ch,
+ std::vector<Transaction>& tls,
+ TrackedOpRef op = TrackedOpRef(),
+ ThreadPool::TPHandle *handle = NULL) override;
+};
+
+
+
+
+#endif
diff --git a/src/os/memstore/PageSet.h b/src/os/memstore/PageSet.h
new file mode 100644
index 000000000..71954e574
--- /dev/null
+++ b/src/os/memstore/PageSet.h
@@ -0,0 +1,232 @@
+// -*- 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) 2013- Sage Weil <sage@inktank.com>
+ *
+ * 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.
+ *
+ */
+
+#ifndef CEPH_PAGESET_H
+#define CEPH_PAGESET_H
+
+#include <algorithm>
+#include <atomic>
+#include <cassert>
+#include <mutex>
+#include <vector>
+#include <boost/intrusive/avl_set.hpp>
+#include <boost/intrusive_ptr.hpp>
+
+#include "include/encoding.h"
+
+struct Page {
+ char *const data;
+ boost::intrusive::avl_set_member_hook<> hook;
+ uint64_t offset;
+
+ // avoid RefCountedObject because it has a virtual destructor
+ std::atomic<uint16_t> nrefs;
+ void get() { ++nrefs; }
+ void put() { if (--nrefs == 0) delete this; }
+
+ typedef boost::intrusive_ptr<Page> Ref;
+ friend void intrusive_ptr_add_ref(Page *p) { p->get(); }
+ friend void intrusive_ptr_release(Page *p) { p->put(); }
+
+ // key-value comparison functor for avl
+ struct Less {
+ bool operator()(uint64_t offset, const Page &page) const {
+ return offset < page.offset;
+ }
+ bool operator()(const Page &page, uint64_t offset) const {
+ return page.offset < offset;
+ }
+ bool operator()(const Page &lhs, const Page &rhs) const {
+ return lhs.offset < rhs.offset;
+ }
+ };
+ void encode(ceph::buffer::list &bl, size_t page_size) const {
+ using ceph::encode;
+ bl.append(ceph::buffer::copy(data, page_size));
+ encode(offset, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator &p, size_t page_size) {
+ using ceph::decode;
+ p.copy(page_size, data);
+ decode(offset, p);
+ }
+
+ static Ref create(size_t page_size, uint64_t offset = 0) {
+ // ensure proper alignment of the Page
+ const auto align = alignof(Page);
+ page_size = (page_size + align - 1) & ~(align - 1);
+ // allocate the Page and its data in a single buffer
+ auto buffer = new char[page_size + sizeof(Page)];
+ // place the Page structure at the end of the buffer
+ return new (buffer + page_size) Page(buffer, offset);
+ }
+
+ // copy disabled
+ Page(const Page&) = delete;
+ const Page& operator=(const Page&) = delete;
+
+ private: // private constructor, use create() instead
+ Page(char *data, uint64_t offset) : data(data), offset(offset), nrefs(1) {}
+
+ static void operator delete(void *p) {
+ delete[] reinterpret_cast<Page*>(p)->data;
+ }
+};
+
+class PageSet {
+ public:
+ // alloc_range() and get_range() return page refs in a vector
+ typedef std::vector<Page::Ref> page_vector;
+
+ private:
+ // store pages in a boost intrusive avl_set
+ typedef Page::Less page_cmp;
+ typedef boost::intrusive::member_hook<Page,
+ boost::intrusive::avl_set_member_hook<>,
+ &Page::hook> member_option;
+ typedef boost::intrusive::avl_set<Page,
+ boost::intrusive::compare<page_cmp>, member_option> page_set;
+
+ typedef typename page_set::iterator iterator;
+
+ page_set pages;
+ uint64_t page_size;
+
+ typedef std::mutex lock_type;
+ lock_type mutex;
+
+ void free_pages(iterator cur, iterator end) {
+ while (cur != end) {
+ Page *page = &*cur;
+ cur = pages.erase(cur);
+ page->put();
+ }
+ }
+
+ int count_pages(uint64_t offset, uint64_t len) const {
+ // count the overlapping pages
+ int count = 0;
+ if (offset % page_size) {
+ count++;
+ size_t rem = page_size - offset % page_size;
+ len = len <= rem ? 0 : len - rem;
+ }
+ count += len / page_size;
+ if (len % page_size)
+ count++;
+ return count;
+ }
+
+ public:
+ explicit PageSet(size_t page_size) : page_size(page_size) {}
+ PageSet(PageSet &&rhs)
+ : pages(std::move(rhs.pages)), page_size(rhs.page_size) {}
+ ~PageSet() {
+ free_pages(pages.begin(), pages.end());
+ }
+
+ // disable copy
+ PageSet(const PageSet&) = delete;
+ const PageSet& operator=(const PageSet&) = delete;
+
+ bool empty() const { return pages.empty(); }
+ size_t size() const { return pages.size(); }
+ size_t get_page_size() const { return page_size; }
+
+ // allocate all pages that intersect the range [offset,length)
+ void alloc_range(uint64_t offset, uint64_t length, page_vector &range) {
+ // loop in reverse so we can provide hints to avl_set::insert_check()
+ // and get O(1) insertions after the first
+ uint64_t position = offset + length - 1;
+
+ range.resize(count_pages(offset, length));
+ auto out = range.rbegin();
+
+ std::lock_guard<lock_type> lock(mutex);
+ iterator cur = pages.end();
+ while (length) {
+ const uint64_t page_offset = position & ~(page_size-1);
+
+ typename page_set::insert_commit_data commit;
+ auto insert = pages.insert_check(cur, page_offset, page_cmp(), commit);
+ if (insert.second) {
+ auto page = Page::create(page_size, page_offset);
+ cur = pages.insert_commit(*page, commit);
+
+ // assume that the caller will write to the range [offset,length),
+ // so we only need to zero memory outside of this range
+
+ // zero end of page past offset + length
+ if (offset + length < page->offset + page_size)
+ std::fill(page->data + offset + length - page->offset,
+ page->data + page_size, 0);
+ // zero front of page between page_offset and offset
+ if (offset > page->offset)
+ std::fill(page->data, page->data + offset - page->offset, 0);
+ } else { // exists
+ cur = insert.first;
+ }
+ // add a reference to output vector
+ out->reset(&*cur);
+ ++out;
+
+ auto c = std::min(length, (position & (page_size-1)) + 1);
+ position -= c;
+ length -= c;
+ }
+ // make sure we sized the vector correctly
+ ceph_assert(out == range.rend());
+ }
+
+ // return all allocated pages that intersect the range [offset,length)
+ void get_range(uint64_t offset, uint64_t length, page_vector &range) {
+ auto cur = pages.lower_bound(offset & ~(page_size-1), page_cmp());
+ while (cur != pages.end() && cur->offset < offset + length)
+ range.push_back(&*cur++);
+ }
+
+ void free_pages_after(uint64_t offset) {
+ std::lock_guard<lock_type> lock(mutex);
+ auto cur = pages.lower_bound(offset & ~(page_size-1), page_cmp());
+ if (cur == pages.end())
+ return;
+ if (cur->offset < offset)
+ cur++;
+ free_pages(cur, pages.end());
+ }
+
+ void encode(ceph::buffer::list &bl) const {
+ using ceph::encode;
+ encode(page_size, bl);
+ unsigned count = pages.size();
+ encode(count, bl);
+ for (auto p = pages.rbegin(); p != pages.rend(); ++p)
+ p->encode(bl, page_size);
+ }
+ void decode(ceph::buffer::list::const_iterator &p) {
+ using ceph::decode;
+ ceph_assert(empty());
+ decode(page_size, p);
+ unsigned count;
+ decode(count, p);
+ auto cur = pages.end();
+ for (unsigned i = 0; i < count; i++) {
+ auto page = Page::create(page_size);
+ page->decode(p, page_size);
+ cur = pages.insert_before(cur, *page);
+ }
+ }
+};
+
+#endif // CEPH_PAGESET_H
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