// -*- 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. * */ #ifndef CEPH_MDS_SERVER_H #define CEPH_MDS_SERVER_H #include <string_view> #include <common/DecayCounter.h> #include "messages/MClientReconnect.h" #include "messages/MClientReply.h" #include "messages/MClientRequest.h" #include "messages/MClientSession.h" #include "messages/MClientSnap.h" #include "messages/MClientReclaim.h" #include "messages/MClientReclaimReply.h" #include "messages/MLock.h" #include "MDSRank.h" #include "Mutation.h" #include "MDSContext.h" class OSDMap; class PerfCounters; class LogEvent; class EMetaBlob; class EUpdate; class MDLog; struct SnapInfo; enum { l_mdss_first = 1000, l_mdss_dispatch_client_request, l_mdss_dispatch_slave_request, l_mdss_handle_client_request, l_mdss_handle_client_session, l_mdss_handle_slave_request, l_mdss_req_create_latency, l_mdss_req_getattr_latency, l_mdss_req_getfilelock_latency, l_mdss_req_link_latency, l_mdss_req_lookup_latency, l_mdss_req_lookuphash_latency, l_mdss_req_lookupino_latency, l_mdss_req_lookupname_latency, l_mdss_req_lookupparent_latency, l_mdss_req_lookupsnap_latency, l_mdss_req_lssnap_latency, l_mdss_req_mkdir_latency, l_mdss_req_mknod_latency, l_mdss_req_mksnap_latency, l_mdss_req_open_latency, l_mdss_req_readdir_latency, l_mdss_req_rename_latency, l_mdss_req_renamesnap_latency, l_mdss_req_rmdir_latency, l_mdss_req_rmsnap_latency, l_mdss_req_rmxattr_latency, l_mdss_req_setattr_latency, l_mdss_req_setdirlayout_latency, l_mdss_req_setfilelock_latency, l_mdss_req_setlayout_latency, l_mdss_req_setxattr_latency, l_mdss_req_symlink_latency, l_mdss_req_unlink_latency, l_mdss_cap_revoke_eviction, l_mdss_cap_acquisition_throttle, l_mdss_last, }; class Server { public: using clock = ceph::coarse_mono_clock; using time = ceph::coarse_mono_time; private: MDSRank *mds; MDCache *mdcache; MDLog *mdlog; PerfCounters *logger; // OSDMap full status, used to generate ENOSPC on some operations bool is_full; // State for while in reconnect MDSContext *reconnect_done; int failed_reconnects; bool reconnect_evicting; // true if I am waiting for evictions to complete // before proceeding to reconnect_gather_finish time reconnect_start = clock::zero(); time reconnect_last_seen = clock::zero(); set<client_t> client_reconnect_gather; // clients i need a reconnect msg from. feature_bitset_t supported_features; feature_bitset_t required_client_features; bool replay_unsafe_with_closed_session = false; double cap_revoke_eviction_timeout = 0; uint64_t max_snaps_per_dir = 100; friend class MDSContinuation; friend class ServerContext; friend class ServerLogContext; public: bool terminating_sessions; explicit Server(MDSRank *m); ~Server() { g_ceph_context->get_perfcounters_collection()->remove(logger); delete logger; delete reconnect_done; } void create_logger(); // message handler void dispatch(const Message::const_ref &m); void handle_osd_map(); // -- sessions and recovery -- bool waiting_for_reconnect(client_t c) const; void dump_reconnect_status(Formatter *f) const; time last_recalled() const { return last_recall_state; } void handle_client_session(const MClientSession::const_ref &m); void _session_logged(Session *session, uint64_t state_seq, bool open, version_t pv, interval_set<inodeno_t>& inos,version_t piv); version_t prepare_force_open_sessions(map<client_t,entity_inst_t> &cm, map<client_t,client_metadata_t>& cmm, map<client_t,pair<Session*,uint64_t> >& smap); void finish_force_open_sessions(const map<client_t,pair<Session*,uint64_t> >& smap, bool dec_import=true); void flush_client_sessions(set<client_t>& client_set, MDSGatherBuilder& gather); void finish_flush_session(Session *session, version_t seq); void terminate_sessions(); void find_idle_sessions(); void kill_session(Session *session, Context *on_safe); size_t apply_blacklist(const std::set<entity_addr_t> &blacklist); void journal_close_session(Session *session, int state, Context *on_safe); set<client_t> client_reclaim_gather; size_t get_num_pending_reclaim() const { return client_reclaim_gather.size(); } Session *find_session_by_uuid(std::string_view uuid); void reclaim_session(Session *session, const MClientReclaim::const_ref &m); void finish_reclaim_session(Session *session, const MClientReclaimReply::ref &reply=nullptr); void handle_client_reclaim(const MClientReclaim::const_ref &m); void reconnect_clients(MDSContext *reconnect_done_); void handle_client_reconnect(const MClientReconnect::const_ref &m); void infer_supported_features(Session *session, client_metadata_t& client_metadata); void update_required_client_features(); //void process_reconnect_cap(CInode *in, int from, ceph_mds_cap_reconnect& capinfo); void reconnect_gather_finish(); void reconnect_tick(); void recover_filelocks(CInode *in, bufferlist locks, int64_t client); enum class RecallFlags : uint64_t { NONE = 0, STEADY = (1<<0), ENFORCE_MAX = (1<<1), TRIM = (1<<2), ENFORCE_LIVENESS = (1<<3), }; std::pair<bool, uint64_t> recall_client_state(MDSGatherBuilder* gather, RecallFlags=RecallFlags::NONE); void force_clients_readonly(); // -- requests -- void handle_client_request(const MClientRequest::const_ref &m); void journal_and_reply(MDRequestRef& mdr, CInode *tracei, CDentry *tracedn, LogEvent *le, MDSLogContextBase *fin); void submit_mdlog_entry(LogEvent *le, MDSLogContextBase *fin, MDRequestRef& mdr, std::string_view event); void dispatch_client_request(MDRequestRef& mdr); void perf_gather_op_latency(const MClientRequest::const_ref &req, utime_t lat); void early_reply(MDRequestRef& mdr, CInode *tracei, CDentry *tracedn); void respond_to_request(MDRequestRef& mdr, int r = 0); void set_trace_dist(Session *session, const MClientReply::ref &reply, CInode *in, CDentry *dn, snapid_t snapid, int num_dentries_wanted, MDRequestRef& mdr); void handle_slave_request(const MMDSSlaveRequest::const_ref &m); void handle_slave_request_reply(const MMDSSlaveRequest::const_ref &m); void dispatch_slave_request(MDRequestRef& mdr); void handle_slave_auth_pin(MDRequestRef& mdr); void handle_slave_auth_pin_ack(MDRequestRef& mdr, const MMDSSlaveRequest::const_ref &ack); // some helpers bool check_fragment_space(MDRequestRef& mdr, CDir *in); bool check_access(MDRequestRef& mdr, CInode *in, unsigned mask); bool _check_access(Session *session, CInode *in, unsigned mask, int caller_uid, int caller_gid, int setattr_uid, int setattr_gid); CDir *validate_dentry_dir(MDRequestRef& mdr, CInode *diri, std::string_view dname); CDir *traverse_to_auth_dir(MDRequestRef& mdr, vector<CDentry*> &trace, filepath refpath); CDentry *prepare_null_dentry(MDRequestRef& mdr, CDir *dir, std::string_view dname, bool okexist=false); CDentry *prepare_stray_dentry(MDRequestRef& mdr, CInode *in); CInode* prepare_new_inode(MDRequestRef& mdr, CDir *dir, inodeno_t useino, unsigned mode, file_layout_t *layout=NULL); void journal_allocated_inos(MDRequestRef& mdr, EMetaBlob *blob); void apply_allocated_inos(MDRequestRef& mdr, Session *session); CInode* rdlock_path_pin_ref(MDRequestRef& mdr, int n, MutationImpl::LockOpVec& lov, bool want_auth, bool no_want_auth=false, file_layout_t **layout=nullptr, bool no_lookup=false); CDentry* rdlock_path_xlock_dentry(MDRequestRef& mdr, int n, MutationImpl::LockOpVec& lov, bool okexist, bool mustexist, bool alwaysxlock, file_layout_t **layout=nullptr); CDir* try_open_auth_dirfrag(CInode *diri, frag_t fg, MDRequestRef& mdr); // requests on existing inodes. void handle_client_getattr(MDRequestRef& mdr, bool is_lookup); void handle_client_lookup_ino(MDRequestRef& mdr, bool want_parent, bool want_dentry); void _lookup_snap_ino(MDRequestRef& mdr); void _lookup_ino_2(MDRequestRef& mdr, int r); void handle_client_readdir(MDRequestRef& mdr); void handle_client_file_setlock(MDRequestRef& mdr); void handle_client_file_readlock(MDRequestRef& mdr); void handle_client_setattr(MDRequestRef& mdr); void handle_client_setlayout(MDRequestRef& mdr); void handle_client_setdirlayout(MDRequestRef& mdr); int parse_quota_vxattr(string name, string value, quota_info_t *quota); void create_quota_realm(CInode *in); int parse_layout_vxattr(string name, string value, const OSDMap& osdmap, file_layout_t *layout, bool validate=true); int check_layout_vxattr(MDRequestRef& mdr, string name, string value, file_layout_t *layout); void handle_set_vxattr(MDRequestRef& mdr, CInode *cur, file_layout_t *dir_layout, MutationImpl::LockOpVec& lov); void handle_remove_vxattr(MDRequestRef& mdr, CInode *cur, file_layout_t *dir_layout, MutationImpl::LockOpVec& lov); void handle_client_setxattr(MDRequestRef& mdr); void handle_client_removexattr(MDRequestRef& mdr); void handle_client_fsync(MDRequestRef& mdr); // open void handle_client_open(MDRequestRef& mdr); void handle_client_openc(MDRequestRef& mdr); // O_CREAT variant. void do_open_truncate(MDRequestRef& mdr, int cmode); // O_TRUNC variant. // namespace changes void handle_client_mknod(MDRequestRef& mdr); void handle_client_mkdir(MDRequestRef& mdr); void handle_client_symlink(MDRequestRef& mdr); // link void handle_client_link(MDRequestRef& mdr); void _link_local(MDRequestRef& mdr, CDentry *dn, CInode *targeti, SnapRealm *target_realm); void _link_local_finish(MDRequestRef& mdr, CDentry *dn, CInode *targeti, version_t, version_t, bool); void _link_remote(MDRequestRef& mdr, bool inc, CDentry *dn, CInode *targeti); void _link_remote_finish(MDRequestRef& mdr, bool inc, CDentry *dn, CInode *targeti, version_t); void handle_slave_link_prep(MDRequestRef& mdr); void _logged_slave_link(MDRequestRef& mdr, CInode *targeti, bool adjust_realm); void _commit_slave_link(MDRequestRef& mdr, int r, CInode *targeti); void _committed_slave(MDRequestRef& mdr); // use for rename, too void handle_slave_link_prep_ack(MDRequestRef& mdr, const MMDSSlaveRequest::const_ref &m); void do_link_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr); void _link_rollback_finish(MutationRef& mut, MDRequestRef& mdr, map<client_t,MClientSnap::ref>& split); // unlink void handle_client_unlink(MDRequestRef& mdr); bool _dir_is_nonempty_unlocked(MDRequestRef& mdr, CInode *rmdiri); bool _dir_is_nonempty(MDRequestRef& mdr, CInode *rmdiri); void _unlink_local(MDRequestRef& mdr, CDentry *dn, CDentry *straydn); void _unlink_local_finish(MDRequestRef& mdr, CDentry *dn, CDentry *straydn, version_t); bool _rmdir_prepare_witness(MDRequestRef& mdr, mds_rank_t who, vector<CDentry*>& trace, CDentry *straydn); void handle_slave_rmdir_prep(MDRequestRef& mdr); void _logged_slave_rmdir(MDRequestRef& mdr, CDentry *srcdn, CDentry *straydn); void _commit_slave_rmdir(MDRequestRef& mdr, int r, CDentry *straydn); void handle_slave_rmdir_prep_ack(MDRequestRef& mdr, const MMDSSlaveRequest::const_ref &ack); void do_rmdir_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr); void _rmdir_rollback_finish(MDRequestRef& mdr, metareqid_t reqid, CDentry *dn, CDentry *straydn); // rename void handle_client_rename(MDRequestRef& mdr); void _rename_finish(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn); void handle_client_lssnap(MDRequestRef& mdr); void handle_client_mksnap(MDRequestRef& mdr); void _mksnap_finish(MDRequestRef& mdr, CInode *diri, SnapInfo &info); void handle_client_rmsnap(MDRequestRef& mdr); void _rmsnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid); void handle_client_renamesnap(MDRequestRef& mdr); void _renamesnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid); // helpers bool _rename_prepare_witness(MDRequestRef& mdr, mds_rank_t who, set<mds_rank_t> &witnesse, vector<CDentry*>& srctrace, vector<CDentry*>& dsttrace, CDentry *straydn); version_t _rename_prepare_import(MDRequestRef& mdr, CDentry *srcdn, bufferlist *client_map_bl); bool _need_force_journal(CInode *diri, bool empty); void _rename_prepare(MDRequestRef& mdr, EMetaBlob *metablob, bufferlist *client_map_bl, CDentry *srcdn, CDentry *destdn, CDentry *straydn); /* set not_journaling=true if you're going to discard the results -- * this bypasses the asserts to make sure we're journaling the right * things on the right nodes */ void _rename_apply(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn); // slaving void handle_slave_rename_prep(MDRequestRef& mdr); void handle_slave_rename_prep_ack(MDRequestRef& mdr, const MMDSSlaveRequest::const_ref &m); void handle_slave_rename_notify_ack(MDRequestRef& mdr, const MMDSSlaveRequest::const_ref &m); void _slave_rename_sessions_flushed(MDRequestRef& mdr); void _logged_slave_rename(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn); void _commit_slave_rename(MDRequestRef& mdr, int r, CDentry *srcdn, CDentry *destdn, CDentry *straydn); void do_rename_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr, bool finish_mdr=false); void _rename_rollback_finish(MutationRef& mut, MDRequestRef& mdr, CDentry *srcdn, version_t srcdnpv, CDentry *destdn, CDentry *staydn, map<client_t,MClientSnap::ref> splits[2], bool finish_mdr); void evict_cap_revoke_non_responders(); void handle_conf_change(const std::set<std::string>& changed); private: void reply_client_request(MDRequestRef& mdr, const MClientReply::ref &reply); void flush_session(Session *session, MDSGatherBuilder& gather); DecayCounter recall_throttle; time last_recall_state; // Cache cap acquisition throttle configs uint64_t max_caps_per_client; uint64_t cap_acquisition_throttle; double max_caps_throttle_ratio; double caps_throttle_retry_request_timeout; }; static inline constexpr auto operator|(Server::RecallFlags a, Server::RecallFlags b) { using T = std::underlying_type<Server::RecallFlags>::type; return static_cast<Server::RecallFlags>(static_cast<T>(a) | static_cast<T>(b)); } static inline constexpr auto operator&(Server::RecallFlags a, Server::RecallFlags b) { using T = std::underlying_type<Server::RecallFlags>::type; return static_cast<Server::RecallFlags>(static_cast<T>(a) & static_cast<T>(b)); } static inline std::ostream& operator<<(std::ostream& os, const Server::RecallFlags& f) { using T = std::underlying_type<Server::RecallFlags>::type; return os << "0x" << std::hex << static_cast<T>(f) << std::dec; } static inline constexpr bool operator!(const Server::RecallFlags& f) { using T = std::underlying_type<Server::RecallFlags>::type; return static_cast<T>(f) == static_cast<T>(0); } #endif