--- /dev/null
+// -*- 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 "MDSRank.h"
+#include "Mutation.h"
+
+class OSDMap;
+class PerfCounters;
+class LogEvent;
+class EMetaBlob;
+class EUpdate;
+class MMDSSlaveRequest;
+struct SnapInfo;
+class MClientRequest;
+class MClientReply;
+class MDLog;
+
+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,
+ l_mdss_req_getattr,
+ l_mdss_req_getfilelock,
+ l_mdss_req_link,
+ l_mdss_req_lookup,
+ l_mdss_req_lookuphash,
+ l_mdss_req_lookupino,
+ l_mdss_req_lookupname,
+ l_mdss_req_lookupparent,
+ l_mdss_req_lookupsnap,
+ l_mdss_req_lssnap,
+ l_mdss_req_mkdir,
+ l_mdss_req_mknod,
+ l_mdss_req_mksnap,
+ l_mdss_req_open,
+ l_mdss_req_readdir,
+ l_mdss_req_rename,
+ l_mdss_req_renamesnap,
+ l_mdss_req_rmdir,
+ l_mdss_req_rmsnap,
+ l_mdss_req_rmxattr,
+ l_mdss_req_setattr,
+ l_mdss_req_setdirlayout,
+ l_mdss_req_setfilelock,
+ l_mdss_req_setlayout,
+ l_mdss_req_setxattr,
+ l_mdss_req_symlink,
+ l_mdss_req_unlink,
+ l_mdss_last,
+};
+
+class Server {
+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
+ MDSInternalContext *reconnect_done;
+ int failed_reconnects;
+ bool reconnect_evicting; // true if I am waiting for evictions to complete
+ // before proceeding to reconnect_gather_finish
+
+ 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(Message *m);
+
+ void handle_osd_map();
+
+ // -- sessions and recovery --
+ utime_t reconnect_start;
+ set<client_t> client_reconnect_gather; // clients i need a reconnect msg from.
+ bool waiting_for_reconnect(client_t c) const;
+ void dump_reconnect_status(Formatter *f) const;
+
+ Session *get_session(Message *m);
+ void handle_client_session(class MClientSession *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,uint64_t>& sseqmap);
+ void finish_force_open_sessions(map<client_t,entity_inst_t> &cm,
+ map<client_t,uint64_t>& sseqmap,
+ 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);
+ void reconnect_clients(MDSInternalContext *reconnect_done_);
+ void handle_client_reconnect(class MClientReconnect *m);
+ //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);
+
+ void recall_client_state(void);
+ void force_clients_readonly();
+
+ // -- requests --
+ void handle_client_request(MClientRequest *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, const char *evt);
+ void dispatch_client_request(MDRequestRef& mdr);
+ void early_reply(MDRequestRef& mdr, CInode *tracei, CDentry *tracedn);
+ void respond_to_request(MDRequestRef& mdr, int r = 0);
+ void set_trace_dist(Session *session, MClientReply *reply, CInode *in, CDentry *dn,
+ snapid_t snapid,
+ int num_dentries_wanted,
+ MDRequestRef& mdr);
+
+ void encode_empty_dirstat(bufferlist& bl);
+ void encode_infinite_lease(bufferlist& bl);
+ void encode_null_lease(bufferlist& bl);
+
+ void handle_slave_request(MMDSSlaveRequest *m);
+ void handle_slave_request_reply(MMDSSlaveRequest *m);
+ void dispatch_slave_request(MDRequestRef& mdr);
+ void handle_slave_auth_pin(MDRequestRef& mdr);
+ void handle_slave_auth_pin_ack(MDRequestRef& mdr, MMDSSlaveRequest *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, const string& dname);
+ CDir *traverse_to_auth_dir(MDRequestRef& mdr, vector<CDentry*> &trace, filepath refpath);
+ CDentry *prepare_null_dentry(MDRequestRef& mdr, CDir *dir, const string& 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, set<SimpleLock*>& rdlocks, bool want_auth,
+ bool no_want_auth=false,
+ file_layout_t **layout=NULL,
+ bool no_lookup=false);
+ CDentry* rdlock_path_xlock_dentry(MDRequestRef& mdr, int n,
+ set<SimpleLock*>& rdlocks,
+ set<SimpleLock*>& wrlocks,
+ set<SimpleLock*>& xlocks, bool okexist,
+ bool mustexist, bool alwaysxlock,
+ file_layout_t **layout=NULL);
+
+ 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_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_layout_vxattr(string name, string value, const OSDMap& osdmap,
+ file_layout_t *layout, bool validate=true);
+ int parse_quota_vxattr(string name, string value, quota_info_t *quota);
+ 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,
+ set<SimpleLock*> rdlocks,
+ set<SimpleLock*> wrlocks,
+ set<SimpleLock*> xlocks);
+ void handle_remove_vxattr(MDRequestRef& mdr, CInode *cur,
+ file_layout_t *dir_layout,
+ set<SimpleLock*> rdlocks,
+ set<SimpleLock*> wrlocks,
+ set<SimpleLock*> xlocks);
+ 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);
+ void _link_local_finish(MDRequestRef& mdr,
+ CDentry *dn, CInode *targeti,
+ version_t, version_t);
+
+ 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);
+ 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, MMDSSlaveRequest *m);
+ void do_link_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr);
+ void _link_rollback_finish(MutationRef& mut, MDRequestRef& mdr);
+
+ // 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, MMDSSlaveRequest *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, MMDSSlaveRequest *m);
+ void handle_slave_rename_notify_ack(MDRequestRef& mdr, MMDSSlaveRequest *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, bool finish_mdr);
+
+private:
+ void reply_client_request(MDRequestRef& mdr, MClientReply *reply);
+};
+
+#endif
Code Review / stor4nfv.git / blobdiff