ceph/src/messages/MMDSCacheRejoin.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_MMDSCACHEREJOIN_H
  16 #define CEPH_MMDSCACHEREJOIN_H
  17
  18 #include "msg/Message.h"
  19
  20 #include "include/types.h"
  21
  22 #include "mds/CInode.h"
  23 #include "mds/CDir.h"
  24 #include "mds/mdstypes.h"
  25
  26 // sent from replica to auth
  27
  28 class MMDSCacheRejoin : public Message {
  29
  30   static const int HEAD_VERSION = 1;
  31   static const int COMPAT_VERSION = 1;
  32
  33  public:
  34   static const int OP_WEAK    = 1;  // replica -> auth, i exist, + maybe open files.
  35   static const int OP_STRONG  = 2;  // replica -> auth, i exist, + open files and lock state.
  36   static const int OP_ACK     = 3;  // auth -> replica, here is your lock state.
  37   static const char *get_opname(int op) {
  38     switch (op) {
  39     case OP_WEAK: return "weak";
  40     case OP_STRONG: return "strong";
  41     case OP_ACK: return "ack";
  42     default: ceph_abort(); return 0;
  43     }
  44   }
  45
  46   // -- types --
  47   struct inode_strong {
  48     uint32_t nonce;
  49     int32_t caps_wanted;
  50     int32_t filelock, nestlock, dftlock;
  51     inode_strong() {}
  52     inode_strong(int n, int cw, int dl, int nl, int dftl) :
  53       nonce(n), caps_wanted(cw),
  54       filelock(dl), nestlock(nl), dftlock(dftl) { }
  55     void encode(bufferlist &bl) const {
  56       ::encode(nonce, bl);
  57       ::encode(caps_wanted, bl);
  58       ::encode(filelock, bl);
  59       ::encode(nestlock, bl);
  60       ::encode(dftlock, bl);
  61     }
  62     void decode(bufferlist::iterator &bl) {
  63       ::decode(nonce, bl);
  64       ::decode(caps_wanted, bl);
  65       ::decode(filelock, bl);
  66       ::decode(nestlock, bl);
  67       ::decode(dftlock, bl);
  68     }
  69   };
  70   WRITE_CLASS_ENCODER(inode_strong)
  71
  72   struct dirfrag_strong {
  73     uint32_t nonce;
  74     int8_t  dir_rep;
  75     dirfrag_strong() {}
  76     dirfrag_strong(int n, int dr) : nonce(n), dir_rep(dr) {}
  77     void encode(bufferlist &bl) const {
  78       ::encode(nonce, bl);
  79       ::encode(dir_rep, bl);
  80     }
  81     void decode(bufferlist::iterator &bl) {
  82       ::decode(nonce, bl);
  83       ::decode(dir_rep, bl);
  84     }
  85   };
  86   WRITE_CLASS_ENCODER(dirfrag_strong)
  87
  88   struct dn_strong {
  89     snapid_t first;
  90     inodeno_t ino;
  91     inodeno_t remote_ino;
  92     unsigned char remote_d_type;
  93     uint32_t nonce;
  94     int32_t lock;
  95     dn_strong() :
  96       ino(0), remote_ino(0), remote_d_type(0), nonce(0), lock(0) {}
  97     dn_strong(snapid_t f, inodeno_t pi, inodeno_t ri, unsigned char rdt, int n, int l) :
  98       first(f), ino(pi), remote_ino(ri), remote_d_type(rdt), nonce(n), lock(l) {}
  99     bool is_primary() { return ino > 0; }
 100     bool is_remote() { return remote_ino > 0; }
 101     bool is_null() { return ino == 0 && remote_ino == 0; }
 102     void encode(bufferlist &bl) const {
 103       ::encode(first, bl);
 104       ::encode(ino, bl);
 105       ::encode(remote_ino, bl);
 106       ::encode(remote_d_type, bl);
 107       ::encode(nonce, bl);
 108       ::encode(lock, bl);
 109     }
 110     void decode(bufferlist::iterator &bl) {
 111       ::decode(first, bl);
 112       ::decode(ino, bl);
 113       ::decode(remote_ino, bl);
 114       ::decode(remote_d_type, bl);
 115       ::decode(nonce, bl);
 116       ::decode(lock, bl);
 117     }
 118   };
 119   WRITE_CLASS_ENCODER(dn_strong)
 120
 121   struct dn_weak {
 122     snapid_t first;
 123     inodeno_t ino;
 124     dn_weak() : ino(0) {}
 125     dn_weak(snapid_t f, inodeno_t pi) : first(f), ino(pi) {}
 126     void encode(bufferlist &bl) const {
 127       ::encode(first, bl);
 128       ::encode(ino, bl);
 129     }
 130     void decode(bufferlist::iterator &bl) {
 131       ::decode(first, bl);
 132       ::decode(ino, bl);
 133     }
 134   };
 135   WRITE_CLASS_ENCODER(dn_weak)
 136
 137   // -- data --
 138   int32_t op;
 139
 140   struct lock_bls {
 141     bufferlist file, nest, dft;
 142     void encode(bufferlist& bl) const {
 143       ::encode(file, bl);
 144       ::encode(nest, bl);
 145       ::encode(dft, bl);
 146     }
 147     void decode(bufferlist::iterator& bl) {
 148       ::decode(file, bl);
 149       ::decode(nest, bl);
 150       ::decode(dft, bl);
 151     }
 152   };
 153   WRITE_CLASS_ENCODER(lock_bls)
 154
 155   // weak
 156   map<inodeno_t, map<string_snap_t, dn_weak> > weak;
 157   set<dirfrag_t> weak_dirfrags;
 158   set<vinodeno_t> weak_inodes;
 159   map<inodeno_t, lock_bls> inode_scatterlocks;
 160
 161   // strong
 162   map<dirfrag_t, dirfrag_strong> strong_dirfrags;
 163   map<dirfrag_t, map<string_snap_t, dn_strong> > strong_dentries;
 164   map<vinodeno_t, inode_strong> strong_inodes;
 165
 166   // open
 167   map<inodeno_t,map<client_t, cap_reconnect_t> > cap_exports;
 168   map<client_t, entity_inst_t> client_map;
 169   bufferlist imported_caps;
 170
 171   // full
 172   bufferlist inode_base;
 173   bufferlist inode_locks;
 174   map<dirfrag_t, bufferlist> dirfrag_bases;
 175
 176   // authpins, xlocks
 177   struct slave_reqid {
 178     metareqid_t reqid;
 179     __u32 attempt;
 180     slave_reqid() : attempt(0) {}
 181     slave_reqid(const metareqid_t& r, __u32 a)
 182       : reqid(r), attempt(a) {}
 183     void encode(bufferlist& bl) const {
 184       ::encode(reqid, bl);
 185       ::encode(attempt, bl);
 186     }
 187     void decode(bufferlist::iterator& bl) {
 188       ::decode(reqid, bl);
 189       ::decode(attempt, bl);
 190     }
 191   };
 192   map<vinodeno_t, list<slave_reqid> > authpinned_inodes;
 193   map<vinodeno_t, slave_reqid> frozen_authpin_inodes;
 194   map<vinodeno_t, map<__s32, slave_reqid> > xlocked_inodes;
 195   map<vinodeno_t, map<__s32, list<slave_reqid> > > wrlocked_inodes;
 196   map<dirfrag_t, map<string_snap_t, list<slave_reqid> > > authpinned_dentries;
 197   map<dirfrag_t, map<string_snap_t, slave_reqid> > xlocked_dentries;
 198
 199   MMDSCacheRejoin() :
 200     Message(MSG_MDS_CACHEREJOIN, HEAD_VERSION, COMPAT_VERSION)
 201   {}
 202   MMDSCacheRejoin(int o) :
 203     Message(MSG_MDS_CACHEREJOIN, HEAD_VERSION, COMPAT_VERSION),
 204     op(o) {}
 205 private:
 206   ~MMDSCacheRejoin() override {}
 207
 208 public:
 209   const char *get_type_name() const override { return "cache_rejoin"; }
 210   void print(ostream& out) const override {
 211     out << "cache_rejoin " << get_opname(op);
 212   }
 213
 214   // -- builders --
 215   // inodes
 216   void add_weak_inode(vinodeno_t i) {
 217     weak_inodes.insert(i);
 218   }
 219   void add_strong_inode(vinodeno_t i, int n, int cw, int dl, int nl, int dftl) {
 220     strong_inodes[i] = inode_strong(n, cw, dl, nl, dftl);
 221   }
 222   void add_inode_locks(CInode *in, __u32 nonce, bufferlist& bl) {
 223     ::encode(in->inode.ino, inode_locks);
 224     ::encode(in->last, inode_locks);
 225     ::encode(nonce, inode_locks);
 226     ::encode(bl, inode_locks);
 227   }
 228   void add_inode_base(CInode *in, uint64_t features) {
 229     ::encode(in->inode.ino, inode_base);
 230     ::encode(in->last, inode_base);
 231     bufferlist bl;
 232     in->_encode_base(bl, features);
 233     ::encode(bl, inode_base);
 234   }
 235   void add_inode_authpin(vinodeno_t ino, const metareqid_t& ri, __u32 attempt) {
 236     authpinned_inodes[ino].push_back(slave_reqid(ri, attempt));
 237   }
 238   void add_inode_frozen_authpin(vinodeno_t ino, const metareqid_t& ri, __u32 attempt) {
 239     frozen_authpin_inodes[ino] = slave_reqid(ri, attempt);
 240   }
 241   void add_inode_xlock(vinodeno_t ino, int lt, const metareqid_t& ri, __u32 attempt) {
 242     xlocked_inodes[ino][lt] = slave_reqid(ri, attempt);
 243   }
 244   void add_inode_wrlock(vinodeno_t ino, int lt, const metareqid_t& ri, __u32 attempt) {
 245     wrlocked_inodes[ino][lt].push_back(slave_reqid(ri, attempt));
 246   }
 247
 248   void add_scatterlock_state(CInode *in) {
 249     if (inode_scatterlocks.count(in->ino()))
 250       return;  // already added this one
 251     in->encode_lock_state(CEPH_LOCK_IFILE, inode_scatterlocks[in->ino()].file);
 252     in->encode_lock_state(CEPH_LOCK_INEST, inode_scatterlocks[in->ino()].nest);
 253     in->encode_lock_state(CEPH_LOCK_IDFT, inode_scatterlocks[in->ino()].dft);
 254   }
 255
 256   // dirfrags
 257   void add_strong_dirfrag(dirfrag_t df, int n, int dr) {
 258     strong_dirfrags[df] = dirfrag_strong(n, dr);
 259   }
 260   void add_dirfrag_base(CDir *dir) {
 261     bufferlist& bl = dirfrag_bases[dir->dirfrag()];
 262     dir->_encode_base(bl);
 263   }
 264
 265   // dentries
 266   void add_weak_dirfrag(dirfrag_t df) {
 267     weak_dirfrags.insert(df);
 268   }
 269   void add_weak_dentry(inodeno_t dirino, const string& dname, snapid_t last, dn_weak& dnw) {
 270     weak[dirino][string_snap_t(dname, last)] = dnw;
 271   }
 272   void add_weak_primary_dentry(inodeno_t dirino, const string& dname, snapid_t first, snapid_t last, inodeno_t ino) {
 273     weak[dirino][string_snap_t(dname, last)] = dn_weak(first, ino);
 274   }
 275   void add_strong_dentry(dirfrag_t df, const string& dname, snapid_t first, snapid_t last, inodeno_t pi, inodeno_t ri, unsigned char rdt, int n, int ls) {
 276     strong_dentries[df][string_snap_t(dname, last)] = dn_strong(first, pi, ri, rdt, n, ls);
 277   }
 278   void add_dentry_authpin(dirfrag_t df, const string& dname, snapid_t last,
 279                           const metareqid_t& ri, __u32 attempt) {
 280     authpinned_dentries[df][string_snap_t(dname, last)].push_back(slave_reqid(ri, attempt));
 281   }
 282   void add_dentry_xlock(dirfrag_t df, const string& dname, snapid_t last,
 283                         const metareqid_t& ri, __u32 attempt) {
 284     xlocked_dentries[df][string_snap_t(dname, last)] = slave_reqid(ri, attempt);
 285   }
 286
 287   // -- encoding --
 288   void encode_payload(uint64_t features) override {
 289     ::encode(op, payload);
 290     ::encode(strong_inodes, payload);
 291     ::encode(inode_base, payload);
 292     ::encode(inode_locks, payload);
 293     ::encode(inode_scatterlocks, payload);
 294     ::encode(authpinned_inodes, payload);
 295     ::encode(frozen_authpin_inodes, payload);
 296     ::encode(xlocked_inodes, payload);
 297     ::encode(wrlocked_inodes, payload);
 298     ::encode(cap_exports, payload);
 299     ::encode(client_map, payload, features);
 300     ::encode(imported_caps, payload);
 301     ::encode(strong_dirfrags, payload);
 302     ::encode(dirfrag_bases, payload);
 303     ::encode(weak, payload);
 304     ::encode(weak_dirfrags, payload);
 305     ::encode(weak_inodes, payload);
 306     ::encode(strong_dentries, payload);
 307     ::encode(authpinned_dentries, payload);
 308     ::encode(xlocked_dentries, payload);
 309   }
 310   void decode_payload() override {
 311     bufferlist::iterator p = payload.begin();
 312     ::decode(op, p);
 313     ::decode(strong_inodes, p);
 314     ::decode(inode_base, p);
 315     ::decode(inode_locks, p);
 316     ::decode(inode_scatterlocks, p);
 317     ::decode(authpinned_inodes, p);
 318     ::decode(frozen_authpin_inodes, p);
 319     ::decode(xlocked_inodes, p);
 320     ::decode(wrlocked_inodes, p);
 321     ::decode(cap_exports, p);
 322     ::decode(client_map, p);
 323     ::decode(imported_caps, p);
 324     ::decode(strong_dirfrags, p);
 325     ::decode(dirfrag_bases, p);
 326     ::decode(weak, p);
 327     ::decode(weak_dirfrags, p);
 328     ::decode(weak_inodes, p);
 329     ::decode(strong_dentries, p);
 330     ::decode(authpinned_dentries, p);
 331     ::decode(xlocked_dentries, p);
 332   }
 333
 334 };
 335
 336 WRITE_CLASS_ENCODER(MMDSCacheRejoin::inode_strong)
 337 WRITE_CLASS_ENCODER(MMDSCacheRejoin::dirfrag_strong)
 338 WRITE_CLASS_ENCODER(MMDSCacheRejoin::dn_strong)
 339 WRITE_CLASS_ENCODER(MMDSCacheRejoin::dn_weak)
 340 WRITE_CLASS_ENCODER(MMDSCacheRejoin::lock_bls)
 341 WRITE_CLASS_ENCODER(MMDSCacheRejoin::slave_reqid)
 342
 343 inline ostream& operator<<(ostream& out, const MMDSCacheRejoin::slave_reqid& r) {
 344   return out << r.reqid << '.' << r.attempt;
 345 }
 346
 347 #endif