src/ceph/src/mds/LogSegment.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_LOGSEGMENT_H
  16 #define CEPH_LOGSEGMENT_H
  17
  18 #include "include/elist.h"
  19 #include "include/interval_set.h"
  20 #include "include/Context.h"
  21 #include "mdstypes.h"
  22 #include "CInode.h"
  23 #include "CDentry.h"
  24 #include "CDir.h"
  25 #include "MDSContext.h"
  26
  27 #include "include/unordered_set.h"
  28 using ceph::unordered_set;
  29
  30 class CDir;
  31 class CInode;
  32 class CDentry;
  33 class MDSRank;
  34 struct MDSlaveUpdate;
  35
  36 typedef uint64_t log_segment_seq_t;
  37
  38 class LogSegment {
  39  public:
  40   const log_segment_seq_t seq;
  41   uint64_t offset, end;
  42   int num_events;
  43
  44   // dirty items
  45   elist<CDir*>    dirty_dirfrags, new_dirfrags;
  46   elist<CInode*>  dirty_inodes;
  47   elist<CDentry*> dirty_dentries;
  48
  49   elist<CInode*>  open_files;
  50   elist<CInode*>  dirty_parent_inodes;
  51   elist<CInode*>  dirty_dirfrag_dir;
  52   elist<CInode*>  dirty_dirfrag_nest;
  53   elist<CInode*>  dirty_dirfrag_dirfragtree;
  54
  55   elist<MDSlaveUpdate*> slave_updates;
  56
  57   set<CInode*> truncating_inodes;
  58
  59   map<int, ceph::unordered_set<version_t> > pending_commit_tids;  // mdstable
  60   set<metareqid_t> uncommitted_masters;
  61   set<dirfrag_t> uncommitted_fragments;
  62
  63   // client request ids
  64   map<int, ceph_tid_t> last_client_tids;
  65
  66   // potentially dirty sessions
  67   std::set<entity_name_t> touched_sessions;
  68
  69   // table version
  70   version_t inotablev;
  71   version_t sessionmapv;
  72   map<int,version_t> tablev;
  73
  74   // try to expire
  75   void try_to_expire(MDSRank *mds, MDSGatherBuilder &gather_bld, int op_prio);
  76
  77   std::list<MDSInternalContextBase*> expiry_waiters;
  78
  79   void wait_for_expiry(MDSInternalContextBase *c)
  80   {
  81     assert(c != NULL);
  82     expiry_waiters.push_back(c);
  83   }
  84
  85   // cons
  86   LogSegment(uint64_t _seq, loff_t off=-1) :
  87     seq(_seq), offset(off), end(off), num_events(0),
  88     dirty_dirfrags(member_offset(CDir, item_dirty)),
  89     new_dirfrags(member_offset(CDir, item_new)),
  90     dirty_inodes(member_offset(CInode, item_dirty)),
  91     dirty_dentries(member_offset(CDentry, item_dirty)),
  92     open_files(member_offset(CInode, item_open_file)),
  93     dirty_parent_inodes(member_offset(CInode, item_dirty_parent)),
  94     dirty_dirfrag_dir(member_offset(CInode, item_dirty_dirfrag_dir)),
  95     dirty_dirfrag_nest(member_offset(CInode, item_dirty_dirfrag_nest)),
  96     dirty_dirfrag_dirfragtree(member_offset(CInode, item_dirty_dirfrag_dirfragtree)),
  97     slave_updates(0), // passed to begin() manually
  98     inotablev(0), sessionmapv(0)
  99   { }
 100 };
 101
 102 #endif