ceph/src/msg/Message.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_MESSAGE_H
  16 #define CEPH_MESSAGE_H
  17
  18 #include <stdlib.h>
  19 #include <ostream>
  20
  21 #include <boost/intrusive_ptr.hpp>
  22 #include <boost/intrusive/list.hpp>
  23 // Because intrusive_ptr clobbers our assert...
  24 #include "include/assert.h"
  25
  26 #include "include/types.h"
  27 #include "include/buffer.h"
  28 #include "common/Throttle.h"
  29 #include "common/zipkin_trace.h"
  30 #include "msg_types.h"
  31
  32 #include "common/RefCountedObj.h"
  33 #include "msg/Connection.h"
  34
  35 #include "common/debug.h"
  36 #include "common/config.h"
  37
  38 // monitor internal
  39 #define MSG_MON_SCRUB              64
  40 #define MSG_MON_ELECTION           65
  41 #define MSG_MON_PAXOS              66
  42 #define MSG_MON_PROBE              67
  43 #define MSG_MON_JOIN               68
  44 #define MSG_MON_SYNC               69
  45
  46 /* monitor <-> mon admin tool */
  47 #define MSG_MON_COMMAND            50
  48 #define MSG_MON_COMMAND_ACK        51
  49 #define MSG_LOG                    52
  50 #define MSG_LOGACK                 53
  51
  52 #define MSG_GETPOOLSTATS           58
  53 #define MSG_GETPOOLSTATSREPLY      59
  54
  55 #define MSG_MON_GLOBAL_ID          60
  56
  57 #define MSG_ROUTE                  47
  58 #define MSG_FORWARD                46
  59
  60 #define MSG_PAXOS                  40
  61
  62
  63 // osd internal
  64 #define MSG_OSD_PING         70
  65 #define MSG_OSD_BOOT         71
  66 #define MSG_OSD_FAILURE      72
  67 #define MSG_OSD_ALIVE        73
  68 #define MSG_OSD_MARK_ME_DOWN 74
  69 #define MSG_OSD_FULL         75
  70
  71 #define MSG_OSD_SUBOP        76
  72 #define MSG_OSD_SUBOPREPLY   77
  73
  74 #define MSG_OSD_PGTEMP       78
  75
  76 #define MSG_OSD_BEACON       79
  77
  78 #define MSG_OSD_PG_NOTIFY      80
  79 #define MSG_OSD_PG_QUERY       81
  80 #define MSG_OSD_PG_LOG         83
  81 #define MSG_OSD_PG_REMOVE      84
  82 #define MSG_OSD_PG_INFO        85
  83 #define MSG_OSD_PG_TRIM        86
  84
  85 #define MSG_PGSTATS            87
  86 #define MSG_PGSTATSACK         88
  87
  88 #define MSG_OSD_PG_CREATE      89
  89 #define MSG_REMOVE_SNAPS       90
  90
  91 #define MSG_OSD_SCRUB          91
  92 #define MSG_OSD_SCRUB_RESERVE  92  // previous PG_MISSING
  93 #define MSG_OSD_REP_SCRUB      93
  94
  95 #define MSG_OSD_PG_SCAN        94
  96 #define MSG_OSD_PG_BACKFILL    95
  97 #define MSG_OSD_PG_BACKFILL_REMOVE 96
  98
  99 #define MSG_COMMAND            97
 100 #define MSG_COMMAND_REPLY      98
 101
 102 #define MSG_OSD_BACKFILL_RESERVE 99
 103 #define MSG_OSD_RECOVERY_RESERVE 150
 104
 105 #define MSG_OSD_PG_PUSH        105
 106 #define MSG_OSD_PG_PULL        106
 107 #define MSG_OSD_PG_PUSH_REPLY  107
 108
 109 #define MSG_OSD_EC_WRITE       108
 110 #define MSG_OSD_EC_WRITE_REPLY 109
 111 #define MSG_OSD_EC_READ        110
 112 #define MSG_OSD_EC_READ_REPLY  111
 113
 114 #define MSG_OSD_REPOP         112
 115 #define MSG_OSD_REPOPREPLY    113
 116 #define MSG_OSD_PG_UPDATE_LOG_MISSING  114
 117 #define MSG_OSD_PG_UPDATE_LOG_MISSING_REPLY  115
 118
 119 #define MSG_OSD_PG_CREATED      116
 120 #define MSG_OSD_REP_SCRUBMAP    117
 121
 122 // *** MDS ***
 123
 124 #define MSG_MDS_BEACON             100  // to monitor
 125 #define MSG_MDS_SLAVE_REQUEST      101
 126 #define MSG_MDS_TABLE_REQUEST      102
 127
 128                                 // 150 already in use (MSG_OSD_RECOVERY_RESERVE)
 129
 130 #define MSG_MDS_RESOLVE            0x200
 131 #define MSG_MDS_RESOLVEACK         0x201
 132 #define MSG_MDS_CACHEREJOIN        0x202
 133 #define MSG_MDS_DISCOVER           0x203
 134 #define MSG_MDS_DISCOVERREPLY      0x204
 135 #define MSG_MDS_INODEUPDATE        0x205
 136 #define MSG_MDS_DIRUPDATE          0x206
 137 #define MSG_MDS_CACHEEXPIRE        0x207
 138 #define MSG_MDS_DENTRYUNLINK       0x208
 139 #define MSG_MDS_FRAGMENTNOTIFY     0x209
 140 #define MSG_MDS_OFFLOAD_TARGETS    0x20a
 141 #define MSG_MDS_DENTRYLINK         0x20c
 142 #define MSG_MDS_FINDINO            0x20d
 143 #define MSG_MDS_FINDINOREPLY       0x20e
 144 #define MSG_MDS_OPENINO            0x20f
 145 #define MSG_MDS_OPENINOREPLY       0x210
 146
 147 #define MSG_MDS_LOCK               0x300
 148 #define MSG_MDS_INODEFILECAPS      0x301
 149
 150 #define MSG_MDS_EXPORTDIRDISCOVER     0x449
 151 #define MSG_MDS_EXPORTDIRDISCOVERACK  0x450
 152 #define MSG_MDS_EXPORTDIRCANCEL       0x451
 153 #define MSG_MDS_EXPORTDIRPREP         0x452
 154 #define MSG_MDS_EXPORTDIRPREPACK      0x453
 155 #define MSG_MDS_EXPORTDIRWARNING      0x454
 156 #define MSG_MDS_EXPORTDIRWARNINGACK   0x455
 157 #define MSG_MDS_EXPORTDIR             0x456
 158 #define MSG_MDS_EXPORTDIRACK          0x457
 159 #define MSG_MDS_EXPORTDIRNOTIFY       0x458
 160 #define MSG_MDS_EXPORTDIRNOTIFYACK    0x459
 161 #define MSG_MDS_EXPORTDIRFINISH       0x460
 162
 163 #define MSG_MDS_EXPORTCAPS            0x470
 164 #define MSG_MDS_EXPORTCAPSACK         0x471
 165 #define MSG_MDS_GATHERCAPS            0x472
 166
 167 #define MSG_MDS_HEARTBEAT          0x500  // for mds load balancer
 168
 169 // *** generic ***
 170 #define MSG_TIMECHECK             0x600
 171 #define MSG_MON_HEALTH            0x601
 172
 173 // *** Message::encode() crcflags bits ***
 174 #define MSG_CRC_DATA           (1 << 0)
 175 #define MSG_CRC_HEADER         (1 << 1)
 176 #define MSG_CRC_ALL            (MSG_CRC_DATA | MSG_CRC_HEADER)
 177
 178 // Xio Testing
 179 #define MSG_DATA_PING             0x602
 180
 181 // Xio intends to define messages 0x603..0x606
 182
 183 // Special
 184 #define MSG_NOP                   0x607
 185
 186 #define MSG_MON_HEALTH_CHECKS     0x608
 187
 188 // *** ceph-mgr <-> OSD/MDS daemons ***
 189 #define MSG_MGR_OPEN              0x700
 190 #define MSG_MGR_CONFIGURE         0x701
 191 #define MSG_MGR_REPORT            0x702
 192
 193 // *** ceph-mgr <-> ceph-mon ***
 194 #define MSG_MGR_BEACON            0x703
 195
 196 // *** ceph-mon(MgrMonitor) -> OSD/MDS daemons ***
 197 #define MSG_MGR_MAP               0x704
 198
 199 // *** ceph-mon(MgrMonitor) -> ceph-mgr
 200 #define MSG_MGR_DIGEST               0x705
 201 // *** cephmgr -> ceph-mon
 202 #define MSG_MON_MGR_REPORT        0x706
 203 #define MSG_SERVICE_MAP           0x707
 204
 205 // ======================================================
 206
 207 // abstract Message class
 208
 209 namespace bi = boost::intrusive;
 210
 211 // XioMessenger conditional trace flags
 212 #define MSG_MAGIC_XIO          0x0002
 213 #define MSG_MAGIC_TRACE_XCON   0x0004
 214 #define MSG_MAGIC_TRACE_DTOR   0x0008
 215 #define MSG_MAGIC_TRACE_HDR    0x0010
 216 #define MSG_MAGIC_TRACE_XIO    0x0020
 217 #define MSG_MAGIC_TRACE_XMSGR  0x0040
 218 #define MSG_MAGIC_TRACE_CTR    0x0080
 219
 220 // XioMessenger diagnostic "ping pong" flag (resend msg when send completes)
 221 #define MSG_MAGIC_REDUPE       0x0100
 222
 223 class Message : public RefCountedObject {
 224 protected:
 225   ceph_msg_header  header;      // headerelope
 226   ceph_msg_footer  footer;
 227   bufferlist       payload;  // "front" unaligned blob
 228   bufferlist       middle;   // "middle" unaligned blob
 229   bufferlist       data;     // data payload (page-alignment will be preserved where possible)
 230
 231   /* recv_stamp is set when the Messenger starts reading the
 232    * Message off the wire */
 233   utime_t recv_stamp;
 234   /* dispatch_stamp is set when the Messenger starts calling dispatch() on
 235    * its endpoints */
 236   utime_t dispatch_stamp;
 237   /* throttle_stamp is the point at which we got throttle */
 238   utime_t throttle_stamp;
 239   /* time at which message was fully read */
 240   utime_t recv_complete_stamp;
 241
 242   ConnectionRef connection;
 243
 244   uint32_t magic = 0;
 245
 246   bi::list_member_hook<> dispatch_q;
 247
 248 public:
 249   // zipkin tracing
 250   ZTracer::Trace trace;
 251   void encode_trace(bufferlist &bl, uint64_t features) const;
 252   void decode_trace(bufferlist::iterator &p, bool create = false);
 253
 254   class CompletionHook : public Context {
 255   protected:
 256     Message *m;
 257     friend class Message;
 258   public:
 259     explicit CompletionHook(Message *_m) : m(_m) {}
 260     virtual void set_message(Message *_m) { m = _m; }
 261   };
 262
 263   typedef bi::list< Message,
 264                     bi::member_hook< Message,
 265                                      bi::list_member_hook<>,
 266                                      &Message::dispatch_q > > Queue;
 267
 268 protected:
 269   CompletionHook* completion_hook = nullptr; // owned by Messenger
 270
 271   // release our size in bytes back to this throttler when our payload
 272   // is adjusted or when we are destroyed.
 273   Throttle *byte_throttler = nullptr;
 274
 275   // release a count back to this throttler when we are destroyed
 276   Throttle *msg_throttler = nullptr;
 277
 278   // keep track of how big this message was when we reserved space in
 279   // the msgr dispatch_throttler, so that we can properly release it
 280   // later.  this is necessary because messages can enter the dispatch
 281   // queue locally (not via read_message()), and those are not
 282   // currently throttled.
 283   uint64_t dispatch_throttle_size = 0;
 284
 285   friend class Messenger;
 286
 287 public:
 288   Message() {
 289     memset(&header, 0, sizeof(header));
 290     memset(&footer, 0, sizeof(footer));
 291   }
 292   Message(int t, int version=1, int compat_version=0) {
 293     memset(&header, 0, sizeof(header));
 294     header.type = t;
 295     header.version = version;
 296     header.compat_version = compat_version;
 297     header.priority = 0;  // undef
 298     header.data_off = 0;
 299     memset(&footer, 0, sizeof(footer));
 300   }
 301
 302   Message *get() {
 303     return static_cast<Message *>(RefCountedObject::get());
 304   }
 305
 306 protected:
 307   ~Message() override {
 308     if (byte_throttler)
 309       byte_throttler->put(payload.length() + middle.length() + data.length());
 310     release_message_throttle();
 311     trace.event("message destructed");
 312     /* call completion hooks (if any) */
 313     if (completion_hook)
 314       completion_hook->complete(0);
 315   }
 316 public:
 317   const ConnectionRef& get_connection() const { return connection; }
 318   void set_connection(const ConnectionRef& c) {
 319     connection = c;
 320   }
 321   CompletionHook* get_completion_hook() { return completion_hook; }
 322   void set_completion_hook(CompletionHook *hook) { completion_hook = hook; }
 323   void set_byte_throttler(Throttle *t) { byte_throttler = t; }
 324   Throttle *get_byte_throttler() { return byte_throttler; }
 325   void set_message_throttler(Throttle *t) { msg_throttler = t; }
 326   Throttle *get_message_throttler() { return msg_throttler; }
 327
 328   void set_dispatch_throttle_size(uint64_t s) { dispatch_throttle_size = s; }
 329   uint64_t get_dispatch_throttle_size() const { return dispatch_throttle_size; }
 330
 331   const ceph_msg_header &get_header() const { return header; }
 332   ceph_msg_header &get_header() { return header; }
 333   void set_header(const ceph_msg_header &e) { header = e; }
 334   void set_footer(const ceph_msg_footer &e) { footer = e; }
 335   const ceph_msg_footer &get_footer() const { return footer; }
 336   ceph_msg_footer &get_footer() { return footer; }
 337   void set_src(const entity_name_t& src) { header.src = src; }
 338
 339   uint32_t get_magic() const { return magic; }
 340   void set_magic(int _magic) { magic = _magic; }
 341
 342   /*
 343    * If you use get_[data, middle, payload] you shouldn't
 344    * use it to change those bufferlists unless you KNOW
 345    * there is no throttle being used. The other
 346    * functions are throttling-aware as appropriate.
 347    */
 348
 349   void clear_payload() {
 350     if (byte_throttler) {
 351       byte_throttler->put(payload.length() + middle.length());
 352     }
 353     payload.clear();
 354     middle.clear();
 355   }
 356
 357   virtual void clear_buffers() {}
 358   void clear_data() {
 359     if (byte_throttler)
 360       byte_throttler->put(data.length());
 361     data.clear();
 362     clear_buffers(); // let subclass drop buffers as well
 363   }
 364   void release_message_throttle() {
 365     if (msg_throttler)
 366       msg_throttler->put();
 367     msg_throttler = nullptr;
 368   }
 369
 370   bool empty_payload() const { return payload.length() == 0; }
 371   bufferlist& get_payload() { return payload; }
 372   void set_payload(bufferlist& bl) {
 373     if (byte_throttler)
 374       byte_throttler->put(payload.length());
 375     payload.claim(bl, buffer::list::CLAIM_ALLOW_NONSHAREABLE);
 376     if (byte_throttler)
 377       byte_throttler->take(payload.length());
 378   }
 379
 380   void set_middle(bufferlist& bl) {
 381     if (byte_throttler)
 382       byte_throttler->put(middle.length());
 383     middle.claim(bl, buffer::list::CLAIM_ALLOW_NONSHAREABLE);
 384     if (byte_throttler)
 385       byte_throttler->take(middle.length());
 386   }
 387   bufferlist& get_middle() { return middle; }
 388
 389   void set_data(const bufferlist &bl) {
 390     if (byte_throttler)
 391       byte_throttler->put(data.length());
 392     data.share(bl);
 393     if (byte_throttler)
 394       byte_throttler->take(data.length());
 395   }
 396
 397   const bufferlist& get_data() const { return data; }
 398   bufferlist& get_data() { return data; }
 399   void claim_data(bufferlist& bl,
 400                   unsigned int flags = buffer::list::CLAIM_DEFAULT) {
 401     if (byte_throttler)
 402       byte_throttler->put(data.length());
 403     bl.claim(data, flags);
 404   }
 405   off_t get_data_len() const { return data.length(); }
 406
 407   void set_recv_stamp(utime_t t) { recv_stamp = t; }
 408   const utime_t& get_recv_stamp() const { return recv_stamp; }
 409   void set_dispatch_stamp(utime_t t) { dispatch_stamp = t; }
 410   const utime_t& get_dispatch_stamp() const { return dispatch_stamp; }
 411   void set_throttle_stamp(utime_t t) { throttle_stamp = t; }
 412   const utime_t& get_throttle_stamp() const { return throttle_stamp; }
 413   void set_recv_complete_stamp(utime_t t) { recv_complete_stamp = t; }
 414   const utime_t& get_recv_complete_stamp() const { return recv_complete_stamp; }
 415
 416   void calc_header_crc() {
 417     header.crc = ceph_crc32c(0, (unsigned char*)&header,
 418                              sizeof(header) - sizeof(header.crc));
 419   }
 420   void calc_front_crc() {
 421     footer.front_crc = payload.crc32c(0);
 422     footer.middle_crc = middle.crc32c(0);
 423   }
 424   void calc_data_crc() {
 425     footer.data_crc = data.crc32c(0);
 426   }
 427
 428   virtual int get_cost() const {
 429     return data.length();
 430   }
 431
 432   // type
 433   int get_type() const { return header.type; }
 434   void set_type(int t) { header.type = t; }
 435
 436   uint64_t get_tid() const { return header.tid; }
 437   void set_tid(uint64_t t) { header.tid = t; }
 438
 439   uint64_t get_seq() const { return header.seq; }
 440   void set_seq(uint64_t s) { header.seq = s; }
 441
 442   unsigned get_priority() const { return header.priority; }
 443   void set_priority(__s16 p) { header.priority = p; }
 444
 445   // source/dest
 446   entity_inst_t get_source_inst() const {
 447     return entity_inst_t(get_source(), get_source_addr());
 448   }
 449   entity_name_t get_source() const {
 450     return entity_name_t(header.src);
 451   }
 452   entity_addr_t get_source_addr() const {
 453     if (connection)
 454       return connection->get_peer_addr();
 455     return entity_addr_t();
 456   }
 457
 458   // forwarded?
 459   entity_inst_t get_orig_source_inst() const {
 460     return get_source_inst();
 461   }
 462   entity_name_t get_orig_source() const {
 463     return get_source();
 464   }
 465   entity_addr_t get_orig_source_addr() const {
 466     return get_source_addr();
 467   }
 468
 469   // virtual bits
 470   virtual void decode_payload() = 0;
 471   virtual void encode_payload(uint64_t features) = 0;
 472   virtual const char *get_type_name() const = 0;
 473   virtual void print(ostream& out) const {
 474     out << get_type_name() << " magic: " << magic;
 475   }
 476
 477   virtual void dump(Formatter *f) const;
 478
 479   void encode(uint64_t features, int crcflags);
 480 };
 481 typedef boost::intrusive_ptr<Message> MessageRef;
 482
 483 extern Message *decode_message(CephContext *cct, int crcflags,
 484                                ceph_msg_header &header,
 485                                ceph_msg_footer& footer, bufferlist& front,
 486                                bufferlist& middle, bufferlist& data,
 487                                Connection* conn);
 488 inline ostream& operator<<(ostream& out, const Message& m) {
 489   m.print(out);
 490   if (m.get_header().version)
 491     out << " v" << m.get_header().version;
 492   return out;
 493 }
 494
 495 extern void encode_message(Message *m, uint64_t features, bufferlist& bl);
 496 extern Message *decode_message(CephContext *cct, int crcflags,
 497                                bufferlist::iterator& bl);
 498
 499 #endif