ceph/src/messages/MClientCaps.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_MCLIENTCAPS_H
  16 #define CEPH_MCLIENTCAPS_H
  17
  18 #include "msg/Message.h"
  19 #include "include/ceph_features.h"
  20
  21 #define CLIENT_CAPS_SYNC                (0x1)
  22
  23 class MClientCaps : public Message {
  24   static const int HEAD_VERSION = 10;
  25   static const int COMPAT_VERSION = 1;
  26
  27  public:
  28   struct ceph_mds_caps_head head;
  29
  30   uint64_t size, max_size, truncate_size, change_attr;
  31   uint32_t truncate_seq;
  32   utime_t mtime, atime, ctime, btime;
  33   uint32_t time_warp_seq;
  34
  35   struct ceph_mds_cap_peer peer;
  36
  37   bufferlist snapbl;
  38   bufferlist xattrbl;
  39   bufferlist flockbl;
  40   version_t  inline_version;
  41   bufferlist inline_data;
  42
  43   // Receivers may not use their new caps until they have this OSD map
  44   epoch_t osd_epoch_barrier;
  45   ceph_tid_t oldest_flush_tid;
  46   uint32_t caller_uid;
  47   uint32_t caller_gid;
  48
  49   /* advisory CLIENT_CAPS_* flags to send to mds */
  50   unsigned flags;
  51
  52   int      get_caps() { return head.caps; }
  53   int      get_wanted() { return head.wanted; }
  54   int      get_dirty() { return head.dirty; }
  55   ceph_seq_t get_seq() { return head.seq; }
  56   ceph_seq_t get_issue_seq() { return head.issue_seq; }
  57   ceph_seq_t get_mseq() { return head.migrate_seq; }
  58
  59   inodeno_t get_ino() { return inodeno_t(head.ino); }
  60   inodeno_t get_realm() { return inodeno_t(head.realm); }
  61   uint64_t get_cap_id() { return head.cap_id; }
  62
  63   uint64_t get_size() { return size;  }
  64   uint64_t get_max_size() { return max_size;  }
  65   __u32 get_truncate_seq() { return truncate_seq; }
  66   uint64_t get_truncate_size() { return truncate_size; }
  67   utime_t get_ctime() { return ctime; }
  68   utime_t get_btime() { return btime; }
  69   utime_t get_mtime() { return mtime; }
  70   utime_t get_atime() { return atime; }
  71   __u64 get_change_attr() { return change_attr; }
  72   __u32 get_time_warp_seq() { return time_warp_seq; }
  73
  74   const file_layout_t& get_layout() {
  75     return layout;
  76   }
  77
  78   void set_layout(const file_layout_t &l) {
  79     layout = l;
  80   }
  81
  82   int       get_migrate_seq() { return head.migrate_seq; }
  83   int       get_op() { return head.op; }
  84
  85   uint64_t get_client_tid() { return get_tid(); }
  86   void set_client_tid(uint64_t s) { set_tid(s); }
  87
  88   snapid_t get_snap_follows() { return snapid_t(head.snap_follows); }
  89   void set_snap_follows(snapid_t s) { head.snap_follows = s; }
  90
  91   void set_caps(int c) { head.caps = c; }
  92   void set_wanted(int w) { head.wanted = w; }
  93
  94   void set_max_size(uint64_t ms) { max_size = ms; }
  95
  96   void set_migrate_seq(unsigned m) { head.migrate_seq = m; }
  97   void set_op(int o) { head.op = o; }
  98
  99   void set_size(loff_t s) { size = s; }
 100   void set_mtime(const utime_t &t) { mtime = t; }
 101   void set_ctime(const utime_t &t) { ctime = t; }
 102   void set_atime(const utime_t &t) { atime = t; }
 103
 104   void set_cap_peer(uint64_t id, ceph_seq_t seq, ceph_seq_t mseq, int mds, int flags) {
 105     peer.cap_id = id;
 106     peer.seq = seq;
 107     peer.mseq = mseq;
 108     peer.mds = mds;
 109     peer.flags = flags;
 110   }
 111
 112   void set_oldest_flush_tid(ceph_tid_t tid) { oldest_flush_tid = tid; }
 113   ceph_tid_t get_oldest_flush_tid() { return oldest_flush_tid; }
 114
 115   void clear_dirty() { head.dirty = 0; }
 116
 117   MClientCaps()
 118     : Message(CEPH_MSG_CLIENT_CAPS, HEAD_VERSION, COMPAT_VERSION),
 119       size(0),
 120       max_size(0),
 121       truncate_size(0),
 122       change_attr(0),
 123       truncate_seq(0),
 124       time_warp_seq(0),
 125       osd_epoch_barrier(0),
 126       oldest_flush_tid(0),
 127       caller_uid(0), caller_gid(0),
 128       flags(0) {
 129     inline_version = 0;
 130   }
 131   MClientCaps(int op,
 132               inodeno_t ino,
 133               inodeno_t realm,
 134               uint64_t id,
 135               long seq,
 136               int caps,
 137               int wanted,
 138               int dirty,
 139               int mseq,
 140               epoch_t oeb)
 141     : Message(CEPH_MSG_CLIENT_CAPS, HEAD_VERSION, COMPAT_VERSION),
 142       size(0),
 143       max_size(0),
 144       truncate_size(0),
 145       change_attr(0),
 146       truncate_seq(0),
 147       time_warp_seq(0),
 148       osd_epoch_barrier(oeb),
 149       oldest_flush_tid(0),
 150       caller_uid(0), caller_gid(0),
 151       flags(0) {
 152     memset(&head, 0, sizeof(head));
 153     head.op = op;
 154     head.ino = ino;
 155     head.realm = realm;
 156     head.cap_id = id;
 157     head.seq = seq;
 158     head.caps = caps;
 159     head.wanted = wanted;
 160     head.dirty = dirty;
 161     head.migrate_seq = mseq;
 162     memset(&peer, 0, sizeof(peer));
 163     inline_version = 0;
 164   }
 165   MClientCaps(int op,
 166               inodeno_t ino, inodeno_t realm,
 167               uint64_t id, int mseq, epoch_t oeb)
 168     : Message(CEPH_MSG_CLIENT_CAPS, HEAD_VERSION, COMPAT_VERSION),
 169       size(0),
 170       max_size(0),
 171       truncate_size(0),
 172       change_attr(0),
 173       truncate_seq(0),
 174       time_warp_seq(0),
 175       osd_epoch_barrier(oeb),
 176       oldest_flush_tid(0),
 177       caller_uid(0), caller_gid(0),
 178       flags(0) {
 179     memset(&head, 0, sizeof(head));
 180     head.op = op;
 181     head.ino = ino;
 182     head.realm = realm;
 183     head.cap_id = id;
 184     head.migrate_seq = mseq;
 185     memset(&peer, 0, sizeof(peer));
 186     inline_version = 0;
 187   }
 188 private:
 189   file_layout_t layout;
 190
 191   ~MClientCaps() override {}
 192
 193 public:
 194   const char *get_type_name() const override { return "Cfcap";}
 195   void print(ostream& out) const override {
 196     out << "client_caps(" << ceph_cap_op_name(head.op)
 197         << " ino " << inodeno_t(head.ino)
 198         << " " << head.cap_id
 199         << " seq " << head.seq;
 200     if (get_tid())
 201       out << " tid " << get_tid();
 202     out << " caps=" << ccap_string(head.caps)
 203         << " dirty=" << ccap_string(head.dirty)
 204         << " wanted=" << ccap_string(head.wanted);
 205     out << " follows " << snapid_t(head.snap_follows);
 206     if (head.migrate_seq)
 207       out << " mseq " << head.migrate_seq;
 208
 209     out << " size " << size << "/" << max_size;
 210     if (truncate_seq)
 211       out << " ts " << truncate_seq << "/" << truncate_size;
 212     out << " mtime " << mtime;
 213     if (time_warp_seq)
 214       out << " tws " << time_warp_seq;
 215
 216     if (head.xattr_version)
 217       out << " xattrs(v=" << head.xattr_version << " l=" << xattrbl.length() << ")";
 218
 219     out << ")";
 220   }
 221
 222   void decode_payload() override {
 223     bufferlist::iterator p = payload.begin();
 224     ::decode(head, p);
 225     ceph_mds_caps_body_legacy body;
 226     ::decode(body, p);
 227     if (head.op == CEPH_CAP_OP_EXPORT) {
 228       peer = body.peer;
 229     } else {
 230       size = body.size;
 231       max_size = body.max_size;
 232       truncate_size = body.truncate_size;
 233       truncate_seq = body.truncate_seq;
 234       mtime = utime_t(body.mtime);
 235       atime = utime_t(body.atime);
 236       ctime = utime_t(body.ctime);
 237       layout.from_legacy(body.layout);
 238       time_warp_seq = body.time_warp_seq;
 239     }
 240     ::decode_nohead(head.snap_trace_len, snapbl, p);
 241
 242     assert(middle.length() == head.xattr_len);
 243     if (head.xattr_len)
 244       xattrbl = middle;
 245
 246     // conditionally decode flock metadata
 247     if (header.version >= 2)
 248       ::decode(flockbl, p);
 249
 250     if (header.version >= 3) {
 251       if (head.op == CEPH_CAP_OP_IMPORT)
 252         ::decode(peer, p);
 253     }
 254
 255     if (header.version >= 4) {
 256       ::decode(inline_version, p);
 257       ::decode(inline_data, p);
 258     } else {
 259       inline_version = CEPH_INLINE_NONE;
 260     }
 261
 262     if (header.version >= 5) {
 263       ::decode(osd_epoch_barrier, p);
 264     }
 265     if (header.version >= 6) {
 266       ::decode(oldest_flush_tid, p);
 267     }
 268     if (header.version >= 7) {
 269       ::decode(caller_uid, p);
 270       ::decode(caller_gid, p);
 271     }
 272     if (header.version >= 8) {
 273       ::decode(layout.pool_ns, p);
 274     }
 275     if (header.version >= 9) {
 276       ::decode(btime, p);
 277       ::decode(change_attr, p);
 278     }
 279     if (header.version >= 10) {
 280       ::decode(flags, p);
 281     }
 282   }
 283   void encode_payload(uint64_t features) override {
 284     header.version = HEAD_VERSION;
 285     head.snap_trace_len = snapbl.length();
 286     head.xattr_len = xattrbl.length();
 287
 288     ::encode(head, payload);
 289     ceph_mds_caps_body_legacy body;
 290     if (head.op == CEPH_CAP_OP_EXPORT) {
 291       memset(&body, 0, sizeof(body));
 292       body.peer = peer;
 293     } else {
 294       body.size = size;
 295       body.max_size = max_size;
 296       body.truncate_size = truncate_size;
 297       body.truncate_seq = truncate_seq;
 298       mtime.encode_timeval(&body.mtime);
 299       atime.encode_timeval(&body.atime);
 300       ctime.encode_timeval(&body.ctime);
 301       layout.to_legacy(&body.layout);
 302       body.time_warp_seq = time_warp_seq;
 303     }
 304     ::encode(body, payload);
 305     ::encode_nohead(snapbl, payload);
 306
 307     middle = xattrbl;
 308
 309     // conditionally include flock metadata
 310     if (features & CEPH_FEATURE_FLOCK) {
 311       ::encode(flockbl, payload);
 312     } else {
 313       header.version = 1;
 314       return;
 315     }
 316
 317     if (features & CEPH_FEATURE_EXPORT_PEER) {
 318       if (head.op == CEPH_CAP_OP_IMPORT)
 319         ::encode(peer, payload);
 320     } else {
 321       header.version = 2;
 322       return;
 323     }
 324
 325     if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
 326       ::encode(inline_version, payload);
 327       ::encode(inline_data, payload);
 328     } else {
 329       ::encode(inline_version, payload);
 330       ::encode(bufferlist(), payload);
 331     }
 332
 333     ::encode(osd_epoch_barrier, payload);
 334     ::encode(oldest_flush_tid, payload);
 335     ::encode(caller_uid, payload);
 336     ::encode(caller_gid, payload);
 337
 338     ::encode(layout.pool_ns, payload);
 339     ::encode(btime, payload);
 340     ::encode(change_attr, payload);
 341     ::encode(flags, payload);
 342   }
 343 };
 344
 345 #endif