ceph/src/messages/MCacheExpire.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_MCACHEEXPIRE_H
  16 #define CEPH_MCACHEEXPIRE_H
  17
  18 #include "mds/mdstypes.h"
  19
  20 class MCacheExpire : public Message {
  21   __s32 from;
  22
  23 public:
  24   /*
  25     group things by realm (auth delgation root), since that's how auth is determined.
  26     that makes it less work to process when exports are in progress.
  27   */
  28   struct realm {
  29     map<vinodeno_t, uint32_t> inodes;
  30     map<dirfrag_t, uint32_t> dirs;
  31     map<dirfrag_t, map<pair<string,snapid_t>,uint32_t> > dentries;
  32
  33     void merge(realm& o) {
  34       inodes.insert(o.inodes.begin(), o.inodes.end());
  35       dirs.insert(o.dirs.begin(), o.dirs.end());
  36       for (map<dirfrag_t,map<pair<string,snapid_t>,uint32_t> >::iterator p = o.dentries.begin();
  37            p != o.dentries.end();
  38            ++p) {
  39         if (dentries.count(p->first) == 0)
  40           dentries[p->first] = p->second;
  41         else
  42           dentries[p->first].insert(p->second.begin(), p->second.end());
  43       }
  44     }
  45
  46     void encode(bufferlist &bl) const {
  47       ::encode(inodes, bl);
  48       ::encode(dirs, bl);
  49       ::encode(dentries, bl);
  50     }
  51     void decode(bufferlist::iterator &bl) {
  52       ::decode(inodes, bl);
  53       ::decode(dirs, bl);
  54       ::decode(dentries, bl);
  55     }
  56   };
  57   WRITE_CLASS_ENCODER(realm)
  58
  59   map<dirfrag_t, realm> realms;
  60
  61   int get_from() { return from; }
  62
  63   MCacheExpire() : Message(MSG_MDS_CACHEEXPIRE), from(-1) {}
  64   MCacheExpire(int f) :
  65     Message(MSG_MDS_CACHEEXPIRE),
  66     from(f) { }
  67 private:
  68   ~MCacheExpire() override {}
  69
  70 public:
  71   const char *get_type_name() const override { return "cache_expire";}
  72
  73   void add_inode(dirfrag_t r, vinodeno_t vino, unsigned nonce) {
  74     realms[r].inodes[vino] = nonce;
  75   }
  76   void add_dir(dirfrag_t r, dirfrag_t df, unsigned nonce) {
  77     realms[r].dirs[df] = nonce;
  78   }
  79   void add_dentry(dirfrag_t r, dirfrag_t df, const string& dn, snapid_t last, unsigned nonce) {
  80     realms[r].dentries[df][pair<string,snapid_t>(dn,last)] = nonce;
  81   }
  82
  83   void add_realm(dirfrag_t df, realm& r) {
  84     if (realms.count(df) == 0)
  85       realms[df] = r;
  86     else
  87       realms[df].merge(r);
  88   }
  89
  90   void decode_payload() override {
  91     bufferlist::iterator p = payload.begin();
  92     ::decode(from, p);
  93     ::decode(realms, p);
  94   }
  95
  96   void encode_payload(uint64_t features) override {
  97     ::encode(from, payload);
  98     ::encode(realms, payload);
  99   }
 100 };
 101
 102 WRITE_CLASS_ENCODER(MCacheExpire::realm)
 103
 104 #endif