ceph/src/messages/MMDSSlaveRequest.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
  16 #ifndef CEPH_MMDSSLAVEREQUEST_H
  17 #define CEPH_MMDSSLAVEREQUEST_H
  18
  19 #include "msg/Message.h"
  20 #include "mds/mdstypes.h"
  21
  22 class MMDSSlaveRequest : public Message {
  23  public:
  24   static const int OP_XLOCK =       1;
  25   static const int OP_XLOCKACK =   -1;
  26   static const int OP_UNXLOCK =     2;
  27   static const int OP_AUTHPIN =     3;
  28   static const int OP_AUTHPINACK = -3;
  29
  30   static const int OP_LINKPREP =     4;
  31   static const int OP_UNLINKPREP =   5;
  32   static const int OP_LINKPREPACK = -4;
  33
  34   static const int OP_RENAMEPREP =     7;
  35   static const int OP_RENAMEPREPACK = -7;
  36
  37   static const int OP_WRLOCK = 8;
  38   static const int OP_WRLOCKACK = -8;
  39   static const int OP_UNWRLOCK = 9;
  40
  41   static const int OP_RMDIRPREP = 10;
  42   static const int OP_RMDIRPREPACK = -10;
  43
  44   static const int OP_DROPLOCKS = 11;
  45
  46   static const int OP_RENAMENOTIFY = 12;
  47   static const int OP_RENAMENOTIFYACK = -12;
  48
  49   static const int OP_FINISH = 17;
  50   static const int OP_COMMITTED = -18;
  51
  52   static const int OP_ABORT =  20;  // used for recovery only
  53   //static const int OP_COMMIT = 21;  // used for recovery only
  54
  55
  56   const static char *get_opname(int o) {
  57     switch (o) {
  58     case OP_XLOCK: return "xlock";
  59     case OP_XLOCKACK: return "xlock_ack";
  60     case OP_UNXLOCK: return "unxlock";
  61     case OP_AUTHPIN: return "authpin";
  62     case OP_AUTHPINACK: return "authpin_ack";
  63
  64     case OP_LINKPREP: return "link_prep";
  65     case OP_LINKPREPACK: return "link_prep_ack";
  66     case OP_UNLINKPREP: return "unlink_prep";
  67
  68     case OP_RENAMEPREP: return "rename_prep";
  69     case OP_RENAMEPREPACK: return "rename_prep_ack";
  70
  71     case OP_FINISH: return "finish"; // commit
  72     case OP_COMMITTED: return "committed";
  73
  74     case OP_WRLOCK: return "wrlock";
  75     case OP_WRLOCKACK: return "wrlock_ack";
  76     case OP_UNWRLOCK: return "unwrlock";
  77
  78     case OP_RMDIRPREP: return "rmdir_prep";
  79     case OP_RMDIRPREPACK: return "rmdir_prep_ack";
  80
  81     case OP_DROPLOCKS: return "drop_locks";
  82
  83     case OP_RENAMENOTIFY: return "rename_notify";
  84     case OP_RENAMENOTIFYACK: return "rename_notify_ack";
  85
  86     case OP_ABORT: return "abort";
  87       //case OP_COMMIT: return "commit";
  88
  89     default: ceph_abort(); return 0;
  90     }
  91   }
  92
  93  private:
  94   metareqid_t reqid;
  95   __u32 attempt;
  96   __s16 op;
  97   __u16 flags;
  98
  99   static const unsigned FLAG_NONBLOCK   =       1<<0;
 100   static const unsigned FLAG_WOULDBLOCK =       1<<1;
 101   static const unsigned FLAG_NOTJOURNALED =     1<<2;
 102   static const unsigned FLAG_EROFS =            1<<3;
 103   static const unsigned FLAG_ABORT =            1<<4;
 104
 105   // for locking
 106   __u16 lock_type;  // lock object type
 107   MDSCacheObjectInfo object_info;
 108
 109   // for authpins
 110   vector<MDSCacheObjectInfo> authpins;
 111
 112  public:
 113   // for rename prep
 114   filepath srcdnpath;
 115   filepath destdnpath;
 116   set<mds_rank_t> witnesses;
 117   bufferlist inode_export;
 118   version_t inode_export_v;
 119   bufferlist srci_replica;
 120   utime_t op_stamp;
 121
 122   bufferlist stray;  // stray dir + dentry
 123
 124 public:
 125   metareqid_t get_reqid() { return reqid; }
 126   __u32 get_attempt() const { return attempt; }
 127   int get_op() { return op; }
 128   bool is_reply() { return op < 0; }
 129
 130   int get_lock_type() { return lock_type; }
 131   MDSCacheObjectInfo &get_object_info() { return object_info; }
 132   MDSCacheObjectInfo &get_authpin_freeze() { return object_info; }
 133
 134   vector<MDSCacheObjectInfo>& get_authpins() { return authpins; }
 135   void mark_nonblock() { flags |= FLAG_NONBLOCK; }
 136   bool is_nonblock() { return (flags & FLAG_NONBLOCK); }
 137   void mark_error_wouldblock() { flags |= FLAG_WOULDBLOCK; }
 138   bool is_error_wouldblock() { return (flags & FLAG_WOULDBLOCK); }
 139   void mark_not_journaled() { flags |= FLAG_NOTJOURNALED; }
 140   bool is_not_journaled() { return (flags & FLAG_NOTJOURNALED); }
 141   void mark_error_rofs() { flags |= FLAG_EROFS; }
 142   bool is_error_rofs() { return (flags & FLAG_EROFS); }
 143   bool is_abort() { return (flags & FLAG_ABORT); }
 144   void mark_abort() { flags |= FLAG_ABORT; }
 145
 146   void set_lock_type(int t) { lock_type = t; }
 147
 148
 149   // ----
 150   MMDSSlaveRequest() : Message(MSG_MDS_SLAVE_REQUEST) { }
 151   MMDSSlaveRequest(metareqid_t ri, __u32 att, int o) :
 152     Message(MSG_MDS_SLAVE_REQUEST),
 153     reqid(ri), attempt(att), op(o), flags(0), lock_type(0),
 154     inode_export_v(0) { }
 155 private:
 156   ~MMDSSlaveRequest() override {}
 157
 158 public:
 159   void encode_payload(uint64_t features) override {
 160     ::encode(reqid, payload);
 161     ::encode(attempt, payload);
 162     ::encode(op, payload);
 163     ::encode(flags, payload);
 164     ::encode(lock_type, payload);
 165     ::encode(object_info, payload);
 166     ::encode(authpins, payload);
 167     ::encode(srcdnpath, payload);
 168     ::encode(destdnpath, payload);
 169     ::encode(witnesses, payload);
 170     ::encode(op_stamp, payload);
 171     ::encode(inode_export, payload);
 172     ::encode(inode_export_v, payload);
 173     ::encode(srci_replica, payload);
 174     ::encode(stray, payload);
 175   }
 176   void decode_payload() override {
 177     bufferlist::iterator p = payload.begin();
 178     ::decode(reqid, p);
 179     ::decode(attempt, p);
 180     ::decode(op, p);
 181     ::decode(flags, p);
 182     ::decode(lock_type, p);
 183     ::decode(object_info, p);
 184     ::decode(authpins, p);
 185     ::decode(srcdnpath, p);
 186     ::decode(destdnpath, p);
 187     ::decode(witnesses, p);
 188     ::decode(op_stamp, p);
 189     ::decode(inode_export, p);
 190     ::decode(inode_export_v, p);
 191     ::decode(srci_replica, p);
 192     ::decode(stray, p);
 193   }
 194
 195   const char *get_type_name() const override { return "slave_request"; }
 196   void print(ostream& out) const override {
 197     out << "slave_request(" << reqid
 198         << "." << attempt
 199         << " " << get_opname(op)
 200         << ")";
 201   }
 202
 203 };
 204
 205 #endif