ctdb/include/ctdb_protocol.h

   1 /*
   2    ctdb database library
   3
   4    Copyright (C) Andrew Tridgell  2006
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef _CTDB_PROTOCOL_H
  21 #define _CTDB_PROTOCOL_H
  22
  23 /* location of daemon socket, set at configure time */
  24 #ifdef SOCKPATH
  25 #define CTDB_PATH       SOCKPATH
  26 #else
  27 #define CTDB_PATH       "/var/run/ctdb/ctdbd.socket"
  28 #endif
  29
  30 /* default ctdb port number */
  31 #define CTDB_PORT 4379
  32
  33 /* we must align packets to ensure ctdb works on all architectures (eg. sparc) */
  34 #define CTDB_DS_ALIGNMENT 8
  35
  36
  37 #define CTDB_NULL_FUNC                  0xFF000001
  38 #define CTDB_FETCH_FUNC                 0xFF000002
  39 #define CTDB_FETCH_WITH_HEADER_FUNC     0xFF000003
  40
  41
  42 struct ctdb_call {
  43         int call_id;
  44         TDB_DATA key;
  45         TDB_DATA call_data;
  46         TDB_DATA reply_data;
  47         uint32_t status;
  48 #define CTDB_IMMEDIATE_MIGRATION                0x00000001
  49 #define CTDB_CALL_FLAG_VACUUM_MIGRATION         0x00000002
  50 #define CTDB_WANT_READONLY                      0x00000004
  51         uint32_t flags;
  52 };
  53
  54 /*
  55   structure passed to a ctdb call backend function
  56 */
  57 struct ctdb_call_info {
  58         TDB_DATA key;          /* record key */
  59         struct ctdb_ltdb_header *header;
  60         TDB_DATA record_data;  /* current data in the record */
  61         TDB_DATA *new_data;    /* optionally updated record data */
  62         TDB_DATA *call_data;   /* optionally passed from caller */
  63         TDB_DATA *reply_data;  /* optionally returned by function */
  64         uint32_t status;       /* optional reply status - defaults to zero */
  65 };
  66
  67 #define CTDB_ERR_INVALID 1
  68 #define CTDB_ERR_NOMEM 2
  69
  70 /*
  71   ctdb flags
  72 */
  73 #define CTDB_FLAG_TORTURE      (1<<1)
  74
  75 /*
  76    a message handler ID meaning "give me all messages"
  77  */
  78 #define CTDB_SRVID_ALL (~(uint64_t)0)
  79
  80 /*
  81   srvid type : RECOVERY
  82 */
  83 #define CTDB_SRVID_RECOVERY     0xF100000000000000LL
  84
  85 /*
  86    a message handler ID meaning that the cluster has been reconfigured
  87  */
  88 #define CTDB_SRVID_RECONFIGURE 0xF200000000000000LL
  89
  90 /*
  91    a message handler ID meaning that an IP address has been released
  92  */
  93 #define CTDB_SRVID_RELEASE_IP 0xF300000000000000LL
  94
  95 /*
  96    a message handler ID meaning that an IP address has been taken
  97  */
  98 #define CTDB_SRVID_TAKE_IP 0xF301000000000000LL
  99
 100 /*
 101    a message ID to set the node flags in the recovery daemon
 102  */
 103 #define CTDB_SRVID_SET_NODE_FLAGS 0xF400000000000000LL
 104
 105 /*
 106    a message ID to ask the recovery daemon to update the expected node
 107    assignment for a public ip
 108  */
 109 #define CTDB_SRVID_RECD_UPDATE_IP 0xF500000000000000LL
 110
 111 /*
 112   a message to tell the recovery daemon to fetch a set of records
 113  */
 114 #define CTDB_SRVID_VACUUM_FETCH 0xF700000000000000LL
 115
 116 /*
 117   a message to tell the recovery daemon to write a talloc memdump
 118   to the log
 119  */
 120 #define CTDB_SRVID_MEM_DUMP 0xF800000000000000LL
 121
 122 /* A message id used to ask the recover daemon to send logs
 123 */
 124 #define CTDB_SRVID_GETLOG  0xF801000000000000LL
 125
 126 /* A message id used to ask the recover daemon to send logs
 127 */
 128 #define CTDB_SRVID_CLEARLOG  0xF802000000000000LL
 129
 130 /*
 131    a message ID to get the recovery daemon to push the node flags out
 132  */
 133 #define CTDB_SRVID_PUSH_NODE_FLAGS 0xF900000000000000LL
 134
 135 /*
 136    a message ID to get the recovery daemon to reload the nodes file
 137  */
 138 #define CTDB_SRVID_RELOAD_NODES 0xFA00000000000000LL
 139
 140 /*
 141    a message ID to get the recovery daemon to perform a takeover run
 142  */
 143 #define CTDB_SRVID_TAKEOVER_RUN 0xFB00000000000000LL
 144
 145 /* request recovery daemon to rebalance ips for a node.
 146    input is uint32_t for the node id.
 147 */
 148 #define CTDB_SRVID_REBALANCE_NODE 0xFB01000000000000LL
 149
 150 /* A message handler ID to stop takeover runs from occurring */
 151 #define CTDB_SRVID_DISABLE_TAKEOVER_RUNS 0xFB03000000000000LL
 152
 153 /* A message id to ask the recovery daemon to temporarily disable the
 154    public ip checks
 155 */
 156 #define CTDB_SRVID_DISABLE_IP_CHECK  0xFC00000000000000LL
 157
 158 /* A dummy port used for sending back ipreallocate resposnes to the main
 159    daemon
 160 */
 161 #define CTDB_SRVID_TAKEOVER_RUN_RESPONSE  0xFD00000000000000LL
 162
 163 /* A range of ports reserved for registering a PID (top 8 bits)
 164  * All ports matching the 8 top bits are reserved for exclusive use by
 165  * registering a SRVID that matches the process-id of the requesting process
 166  */
 167 #define CTDB_SRVID_PID_RANGE   0x0000000000000000LL
 168
 169 /* A range of ports reserved for samba (top 8 bits)
 170  * All ports matching the 8 top bits are reserved for exclusive use by
 171  * CIFS server
 172  */
 173 #define CTDB_SRVID_SAMBA_NOTIFY  0xFE00000000000000LL
 174 #define CTDB_SRVID_SAMBA_RANGE   0xFE00000000000000LL
 175
 176 /* A range of ports reserved for a CTDB NFS server (top 8 bits)
 177  * All ports matching the 8 top bits are reserved for exclusive use by
 178  * NFS server
 179  */
 180 #define CTDB_SRVID_NFSD_RANGE  0xEE00000000000000LL
 181
 182 /* A range of ports reserved for a CTDB ISCSI server (top 8 bits)
 183  * All ports matching the 8 top bits are reserved for exclusive use by
 184  * ISCSI server
 185  */
 186 #define CTDB_SRVID_ISCSID_RANGE  0xDE00000000000000LL
 187
 188 /* A range of ports reserved for testing (top 8 bits)
 189  * All ports matching the 8 top bits are reserved for exclusive use by
 190  * test applications
 191  */
 192 #define CTDB_SRVID_TEST_RANGE  0xCE00000000000000LL
 193
 194 /* Range of ports reserved for traversals */
 195 #define CTDB_SRVID_TRAVERSE_RANGE  0xBE00000000000000LL
 196
 197 /* used on the domain socket, send a pdu to the local daemon */
 198 #define CTDB_CURRENT_NODE     0xF0000001
 199 /* send a broadcast to all nodes in the cluster, active or not */
 200 #define CTDB_BROADCAST_ALL    0xF0000002
 201 /* send a broadcast to all nodes in the current vnn map */
 202 #define CTDB_BROADCAST_VNNMAP 0xF0000003
 203 /* send a broadcast to all connected nodes */
 204 #define CTDB_BROADCAST_CONNECTED 0xF0000004
 205 /* send a broadcast to selected connected nodes */
 206 #define CTDB_MULTICAST 0xF0000005
 207
 208 /* the key used for transaction locking on persistent databases */
 209 #define CTDB_TRANSACTION_LOCK_KEY "__transaction_lock__"
 210
 211 /* the key used to store persistent db sequence number */
 212 #define CTDB_DB_SEQNUM_KEY "__db_sequence_number__"
 213
 214 #define MONITOR_SCRIPT_OK      0
 215 #define MONITOR_SCRIPT_TIMEOUT 1
 216
 217 #define MAX_SCRIPT_NAME 31
 218 #define MAX_SCRIPT_OUTPUT 511
 219 struct ctdb_script_wire {
 220         char name[MAX_SCRIPT_NAME+1];
 221         struct timeval start;
 222         struct timeval finished;
 223         int32_t status;
 224         char output[MAX_SCRIPT_OUTPUT+1];
 225 };
 226
 227 struct ctdb_scripts_wire {
 228         uint32_t num_scripts;
 229         struct ctdb_script_wire scripts[1];
 230 };
 231
 232 /* different calls to event scripts. */
 233 enum ctdb_eventscript_call {
 234         CTDB_EVENT_INIT,                /* CTDB starting up: no args */
 235         CTDB_EVENT_SETUP,               /* CTDB starting up after transport is readdy: no args. */
 236         CTDB_EVENT_STARTUP,             /* CTDB starting up after initial recovery: no args. */
 237         CTDB_EVENT_START_RECOVERY,      /* CTDB recovery starting: no args. */
 238         CTDB_EVENT_RECOVERED,           /* CTDB recovery finished: no args. */
 239         CTDB_EVENT_TAKE_IP,             /* IP taken: interface, IP address, netmask bits. */
 240         CTDB_EVENT_RELEASE_IP,          /* IP released: interface, IP address, netmask bits. */
 241         CTDB_EVENT_STOPPED,             /* Deprecated, do not use. */
 242         CTDB_EVENT_MONITOR,             /* Please check if service is healthy: no args. */
 243         CTDB_EVENT_STATUS,              /* Deprecated, do not use. */
 244         CTDB_EVENT_SHUTDOWN,            /* CTDB shutting down: no args. */
 245         CTDB_EVENT_RELOAD,              /* Deprecated, do not use */
 246         CTDB_EVENT_UPDATE_IP,           /* IP updating: old interface, new interface, IP address, netmask bits. */
 247         CTDB_EVENT_IPREALLOCATED,       /* when a takeover_run() completes */
 248         CTDB_EVENT_MAX
 249 };
 250
 251 /* Mapping from enum to names. */
 252 extern const char *ctdb_eventscript_call_names[];
 253
 254 /*
 255   operation IDs
 256 */
 257 enum ctdb_operation {
 258         CTDB_REQ_CALL           = 0,
 259         CTDB_REPLY_CALL         = 1,
 260         CTDB_REQ_DMASTER        = 2,
 261         CTDB_REPLY_DMASTER      = 3,
 262         CTDB_REPLY_ERROR        = 4,
 263         CTDB_REQ_MESSAGE        = 5,
 264         /* #6 removed */
 265         CTDB_REQ_CONTROL        = 7,
 266         CTDB_REPLY_CONTROL      = 8,
 267         CTDB_REQ_KEEPALIVE      = 9,
 268 };
 269
 270 #define CTDB_MAGIC 0x43544442 /* CTDB */
 271 #define CTDB_VERSION 1
 272
 273 enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS          = 0,
 274                     CTDB_CONTROL_STATISTICS              = 1,
 275                     /* #2 removed */
 276                     CTDB_CONTROL_PING                    = 3,
 277                     CTDB_CONTROL_GETDBPATH               = 4,
 278                     CTDB_CONTROL_GETVNNMAP               = 5,
 279                     CTDB_CONTROL_SETVNNMAP               = 6,
 280                     CTDB_CONTROL_GET_DEBUG               = 7,
 281                     CTDB_CONTROL_SET_DEBUG               = 8,
 282                     CTDB_CONTROL_GET_DBMAP               = 9,
 283                     CTDB_CONTROL_GET_NODEMAPv4           = 10, /* obsolete */
 284                     CTDB_CONTROL_SET_DMASTER             = 11, /* obsolete */
 285                     /* #12 removed */
 286                     CTDB_CONTROL_PULL_DB                 = 13,
 287                     CTDB_CONTROL_PUSH_DB                 = 14,
 288                     CTDB_CONTROL_GET_RECMODE             = 15,
 289                     CTDB_CONTROL_SET_RECMODE             = 16,
 290                     CTDB_CONTROL_STATISTICS_RESET        = 17,
 291                     CTDB_CONTROL_DB_ATTACH               = 18,
 292                     CTDB_CONTROL_SET_CALL                = 19,
 293                     CTDB_CONTROL_TRAVERSE_START          = 20,
 294                     CTDB_CONTROL_TRAVERSE_ALL            = 21,
 295                     CTDB_CONTROL_TRAVERSE_DATA           = 22,
 296                     CTDB_CONTROL_REGISTER_SRVID          = 23,
 297                     CTDB_CONTROL_DEREGISTER_SRVID        = 24,
 298                     CTDB_CONTROL_GET_DBNAME              = 25,
 299                     CTDB_CONTROL_ENABLE_SEQNUM           = 26,
 300                     CTDB_CONTROL_UPDATE_SEQNUM           = 27,
 301                     /* #28 removed */
 302                     CTDB_CONTROL_DUMP_MEMORY             = 29,
 303                     CTDB_CONTROL_GET_PID                 = 30,
 304                     CTDB_CONTROL_GET_RECMASTER           = 31,
 305                     CTDB_CONTROL_SET_RECMASTER           = 32,
 306                     CTDB_CONTROL_FREEZE                  = 33,
 307                     CTDB_CONTROL_THAW                    = 34,
 308                     CTDB_CONTROL_GET_PNN                 = 35,
 309                     CTDB_CONTROL_SHUTDOWN                = 36,
 310                     CTDB_CONTROL_GET_MONMODE             = 37,
 311                     /* #38 removed */
 312                     /* #39 removed */
 313                     /* #40 removed */
 314                     /* #41 removed */
 315                     CTDB_CONTROL_TAKEOVER_IPv4           = 42, /* obsolete */
 316                     CTDB_CONTROL_RELEASE_IPv4            = 43, /* obsolete */
 317                     CTDB_CONTROL_TCP_CLIENT              = 44,
 318                     CTDB_CONTROL_TCP_ADD                 = 45,
 319                     CTDB_CONTROL_TCP_REMOVE              = 46,
 320                     CTDB_CONTROL_STARTUP                 = 47,
 321                     CTDB_CONTROL_SET_TUNABLE             = 48,
 322                     CTDB_CONTROL_GET_TUNABLE             = 49,
 323                     CTDB_CONTROL_LIST_TUNABLES           = 50,
 324                     CTDB_CONTROL_GET_PUBLIC_IPSv4        = 51, /* obsolete */
 325                     CTDB_CONTROL_MODIFY_FLAGS            = 52,
 326                     CTDB_CONTROL_GET_ALL_TUNABLES        = 53,
 327                     CTDB_CONTROL_KILL_TCP                = 54,
 328                     CTDB_CONTROL_GET_TCP_TICKLE_LIST     = 55,
 329                     CTDB_CONTROL_SET_TCP_TICKLE_LIST     = 56,
 330                     CTDB_CONTROL_REGISTER_SERVER_ID      = 57,
 331                     CTDB_CONTROL_UNREGISTER_SERVER_ID    = 58,
 332                     CTDB_CONTROL_CHECK_SERVER_ID         = 59,
 333                     CTDB_CONTROL_GET_SERVER_ID_LIST      = 60,
 334                     CTDB_CONTROL_DB_ATTACH_PERSISTENT    = 61,
 335                     CTDB_CONTROL_PERSISTENT_STORE        = 62, /* obsolete */
 336                     CTDB_CONTROL_UPDATE_RECORD           = 63,
 337                     CTDB_CONTROL_SEND_GRATIOUS_ARP       = 64,
 338                     CTDB_CONTROL_TRANSACTION_START       = 65,
 339                     CTDB_CONTROL_TRANSACTION_COMMIT      = 66,
 340                     CTDB_CONTROL_WIPE_DATABASE           = 67,
 341                     /* #68 removed */
 342                     CTDB_CONTROL_UPTIME                  = 69,
 343                     CTDB_CONTROL_START_RECOVERY          = 70,
 344                     CTDB_CONTROL_END_RECOVERY            = 71,
 345                     CTDB_CONTROL_RELOAD_NODES_FILE       = 72,
 346                     /* #73 removed */
 347                     CTDB_CONTROL_TRY_DELETE_RECORDS      = 74,
 348                     CTDB_CONTROL_ENABLE_MONITOR          = 75,
 349                     CTDB_CONTROL_DISABLE_MONITOR         = 76,
 350                     CTDB_CONTROL_ADD_PUBLIC_IP           = 77,
 351                     CTDB_CONTROL_DEL_PUBLIC_IP           = 78,
 352                     CTDB_CONTROL_RUN_EVENTSCRIPTS        = 79,
 353                     CTDB_CONTROL_GET_CAPABILITIES        = 80,
 354                     CTDB_CONTROL_START_PERSISTENT_UPDATE = 81,
 355                     CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE= 82,
 356                     CTDB_CONTROL_TRANS2_COMMIT           = 83, /* obsolete */
 357                     CTDB_CONTROL_TRANS2_FINISHED         = 84, /* obsolete */
 358                     CTDB_CONTROL_TRANS2_ERROR            = 85, /* obsolete */
 359                     CTDB_CONTROL_TRANS2_COMMIT_RETRY     = 86, /* obsolete */
 360                     CTDB_CONTROL_RECD_PING               = 87,
 361                     CTDB_CONTROL_RELEASE_IP              = 88,
 362                     CTDB_CONTROL_TAKEOVER_IP             = 89,
 363                     CTDB_CONTROL_GET_PUBLIC_IPS          = 90,
 364                     CTDB_CONTROL_GET_NODEMAP             = 91,
 365                     CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS = 96,
 366                     CTDB_CONTROL_TRAVERSE_KILL           = 97,
 367                     CTDB_CONTROL_RECD_RECLOCK_LATENCY    = 98,
 368                     CTDB_CONTROL_GET_RECLOCK_FILE        = 99,
 369                     CTDB_CONTROL_SET_RECLOCK_FILE        = 100,
 370                     CTDB_CONTROL_STOP_NODE               = 101,
 371                     CTDB_CONTROL_CONTINUE_NODE           = 102,
 372                     CTDB_CONTROL_SET_NATGWSTATE          = 103,
 373                     CTDB_CONTROL_SET_LMASTERROLE         = 104,
 374                     CTDB_CONTROL_SET_RECMASTERROLE       = 105,
 375                     CTDB_CONTROL_ENABLE_SCRIPT           = 107,
 376                     CTDB_CONTROL_DISABLE_SCRIPT          = 108,
 377                     CTDB_CONTROL_SET_BAN_STATE           = 109,
 378                     CTDB_CONTROL_GET_BAN_STATE           = 110,
 379                     CTDB_CONTROL_SET_DB_PRIORITY         = 111,
 380                     CTDB_CONTROL_GET_DB_PRIORITY         = 112,
 381                     CTDB_CONTROL_TRANSACTION_CANCEL      = 113,
 382                     CTDB_CONTROL_REGISTER_NOTIFY         = 114,
 383                     CTDB_CONTROL_DEREGISTER_NOTIFY       = 115,
 384                     CTDB_CONTROL_TRANS2_ACTIVE           = 116, /* obsolete */
 385                     CTDB_CONTROL_GET_LOG                 = 117,
 386                     CTDB_CONTROL_CLEAR_LOG               = 118,
 387                     CTDB_CONTROL_TRANS3_COMMIT           = 119,
 388                     CTDB_CONTROL_GET_DB_SEQNUM           = 120,
 389                     CTDB_CONTROL_DB_SET_HEALTHY          = 121,
 390                     CTDB_CONTROL_DB_GET_HEALTH           = 122,
 391                     CTDB_CONTROL_GET_PUBLIC_IP_INFO      = 123,
 392                     CTDB_CONTROL_GET_IFACES              = 124,
 393                     CTDB_CONTROL_SET_IFACE_LINK_STATE    = 125,
 394                     CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE  = 126,
 395                     CTDB_CONTROL_GET_STAT_HISTORY        = 127,
 396                     CTDB_CONTROL_SCHEDULE_FOR_DELETION   = 128,
 397                     CTDB_CONTROL_SET_DB_READONLY         = 129,
 398                     CTDB_CONTROL_CHECK_SRVIDS            = 130,
 399                     CTDB_CONTROL_TRAVERSE_START_EXT      = 131,
 400                     CTDB_CONTROL_GET_DB_STATISTICS       = 132,
 401                     CTDB_CONTROL_SET_DB_STICKY           = 133,
 402                     CTDB_CONTROL_RELOAD_PUBLIC_IPS       = 134,
 403                     CTDB_CONTROL_TRAVERSE_ALL_EXT        = 135,
 404                     CTDB_CONTROL_RECEIVE_RECORDS         = 136,
 405                     CTDB_CONTROL_IPREALLOCATED           = 137,
 406                     CTDB_CONTROL_GET_RUNSTATE            = 138,
 407                     CTDB_CONTROL_DB_DETACH               = 139,
 408 };
 409
 410 /*
 411   packet structures
 412 */
 413 struct ctdb_req_header {
 414         uint32_t length;
 415         uint32_t ctdb_magic;
 416         uint32_t ctdb_version;
 417         uint32_t generation;
 418         uint32_t operation;
 419         uint32_t destnode;
 420         uint32_t srcnode;
 421         uint32_t reqid;
 422 };
 423
 424 struct ctdb_req_call {
 425         struct ctdb_req_header hdr;
 426         uint32_t flags;
 427         uint32_t db_id;
 428         uint32_t callid;
 429         uint32_t hopcount;
 430         uint32_t keylen;
 431         uint32_t calldatalen;
 432         uint8_t data[1]; /* key[] followed by calldata[] */
 433 };
 434
 435 struct ctdb_reply_call {
 436         struct ctdb_req_header hdr;
 437         uint32_t status;
 438         uint32_t datalen;
 439         uint8_t  data[1];
 440 };
 441
 442 struct ctdb_reply_error {
 443         struct ctdb_req_header hdr;
 444         uint32_t status;
 445         uint32_t msglen;
 446         uint8_t  msg[1];
 447 };
 448
 449 struct ctdb_req_dmaster {
 450         struct ctdb_req_header hdr;
 451         uint32_t db_id;
 452         uint64_t rsn;
 453         uint32_t dmaster;
 454         uint32_t keylen;
 455         uint32_t datalen;
 456         uint8_t  data[1];
 457 };
 458
 459 struct ctdb_reply_dmaster {
 460         struct ctdb_req_header hdr;
 461         uint32_t db_id;
 462         uint64_t rsn;
 463         uint32_t keylen;
 464         uint32_t datalen;
 465         uint8_t  data[1];
 466 };
 467
 468 struct ctdb_req_message {
 469         struct ctdb_req_header hdr;
 470         uint64_t srvid;
 471         uint32_t datalen;
 472         uint8_t data[1];
 473 };
 474
 475 struct ctdb_req_getdbpath {
 476         struct ctdb_req_header hdr;
 477         uint32_t db_id;
 478 };
 479
 480 struct ctdb_reply_getdbpath {
 481         struct ctdb_req_header hdr;
 482         uint32_t datalen;
 483         uint8_t data[1];
 484 };
 485
 486 struct ctdb_req_control {
 487         struct ctdb_req_header hdr;
 488         uint32_t opcode;
 489         uint32_t pad;
 490         uint64_t srvid;
 491         uint32_t client_id;
 492 #define CTDB_CTRL_FLAG_NOREPLY   1
 493 #define CTDB_CTRL_FLAG_OPCODE_SPECIFIC   0xFFFF0000
 494         uint32_t flags;
 495         uint32_t datalen;
 496         uint8_t data[1];
 497 };
 498
 499 struct ctdb_reply_control {
 500         struct ctdb_req_header hdr;
 501         int32_t  status;
 502         uint32_t datalen;
 503         uint32_t errorlen;
 504         uint8_t data[1];
 505 };
 506
 507 struct ctdb_req_keepalive {
 508         struct ctdb_req_header hdr;
 509 };
 510
 511
 512 /*
 513   the extended header for records in the ltdb
 514 */
 515 struct ctdb_ltdb_header {
 516         uint64_t rsn;
 517         uint32_t dmaster;
 518         uint32_t reserved1;
 519 #define CTDB_REC_FLAG_DEFAULT                   0x00000000
 520 #define CTDB_REC_FLAG_MIGRATED_WITH_DATA        0x00010000
 521 #define CTDB_REC_FLAG_VACUUM_MIGRATED           0x00020000
 522 #define CTDB_REC_FLAG_AUTOMATIC                 0x00040000
 523 #define CTDB_REC_RO_HAVE_DELEGATIONS            0x01000000
 524 #define CTDB_REC_RO_HAVE_READONLY               0x02000000
 525 #define CTDB_REC_RO_REVOKING_READONLY           0x04000000
 526 #define CTDB_REC_RO_REVOKE_COMPLETE             0x08000000
 527 #define CTDB_REC_RO_FLAGS                       (CTDB_REC_RO_HAVE_DELEGATIONS|\
 528                                                  CTDB_REC_RO_HAVE_READONLY|\
 529                                                  CTDB_REC_RO_REVOKING_READONLY|\
 530                                                  CTDB_REC_RO_REVOKE_COMPLETE)
 531         uint32_t flags;
 532 };
 533
 534
 535 /*
 536   definitions for different socket structures
 537  */
 538 typedef struct sockaddr_in ctdb_addr_in;
 539 typedef struct sockaddr_in6 ctdb_addr_in6;
 540 typedef union {
 541         struct sockaddr sa;
 542         ctdb_addr_in    ip;
 543         ctdb_addr_in6   ip6;
 544 } ctdb_sock_addr;
 545
 546 /*
 547    A structure describing a single node, its flags and its address
 548 */
 549 struct ctdb_node_and_flags {
 550         uint32_t pnn;
 551         uint32_t flags;
 552         ctdb_sock_addr addr;
 553 };
 554
 555
 556 /*
 557    Structure used for a nodemap.
 558    The nodemap is the structure containing a list of all nodes
 559    known to the cluster and their associated flags.
 560 */
 561 struct ctdb_node_map {
 562         uint32_t num;
 563         struct ctdb_node_and_flags nodes[1];
 564 };
 565
 566 /*
 567  * Node flags
 568  */
 569 #define NODE_FLAGS_DISCONNECTED         0x00000001 /* node isn't connected */
 570 #define NODE_FLAGS_UNHEALTHY            0x00000002 /* monitoring says node is unhealthy */
 571 #define NODE_FLAGS_PERMANENTLY_DISABLED 0x00000004 /* administrator has disabled node */
 572 #define NODE_FLAGS_BANNED               0x00000008 /* recovery daemon has banned the node */
 573 #define NODE_FLAGS_DELETED              0x00000010 /* this node has been deleted */
 574 #define NODE_FLAGS_STOPPED              0x00000020 /* this node has been stopped */
 575 #define NODE_FLAGS_DISABLED             (NODE_FLAGS_UNHEALTHY|NODE_FLAGS_PERMANENTLY_DISABLED)
 576 #define NODE_FLAGS_INACTIVE             (NODE_FLAGS_DELETED|NODE_FLAGS_DISCONNECTED|NODE_FLAGS_BANNED|NODE_FLAGS_STOPPED)
 577
 578 /*
 579  * Node capabilities
 580  */
 581 #define CTDB_CAP_RECMASTER              0x00000001
 582 #define CTDB_CAP_LMASTER                0x00000002
 583 /* This capability is set if CTDB_LVS_PUBLIC_IP is set */
 584 #define CTDB_CAP_LVS                    0x00000004
 585 /* This capability is set if NATGW is enabled */
 586 #define CTDB_CAP_NATGW                  0x00000008
 587
 588
 589 struct ctdb_public_ip {
 590         uint32_t pnn;
 591         ctdb_sock_addr addr;
 592 };
 593
 594 struct ctdb_all_public_ips {
 595         uint32_t num;
 596         struct ctdb_public_ip ips[1];
 597 };
 598
 599
 600 struct latency_counter {
 601         int num;
 602         double min;
 603         double max;
 604         double total;
 605 };
 606
 607 /*
 608   structure used to pass record data between the child and parent
 609  */
 610 struct ctdb_rec_data {
 611         uint32_t length;
 612         uint32_t reqid;
 613         uint32_t keylen;
 614         uint32_t datalen;
 615         uint8_t  data[1];
 616 };
 617
 618 struct ctdb_traverse_start {
 619         uint32_t db_id;
 620         uint32_t reqid;
 621         uint64_t srvid;
 622 };
 623
 624 struct ctdb_traverse_start_ext {
 625         uint32_t db_id;
 626         uint32_t reqid;
 627         uint64_t srvid;
 628         bool withemptyrecords;
 629 };
 630
 631 /*
 632   ctdb statistics information
 633  */
 634 #define MAX_COUNT_BUCKETS 16
 635 #define MAX_HOT_KEYS      10
 636
 637 struct ctdb_statistics {
 638         uint32_t num_clients;
 639         uint32_t frozen;
 640         uint32_t recovering;
 641         uint32_t client_packets_sent;
 642         uint32_t client_packets_recv;
 643         uint32_t node_packets_sent;
 644         uint32_t node_packets_recv;
 645         uint32_t keepalive_packets_sent;
 646         uint32_t keepalive_packets_recv;
 647         struct {
 648                 uint32_t req_call;
 649                 uint32_t reply_call;
 650                 uint32_t req_dmaster;
 651                 uint32_t reply_dmaster;
 652                 uint32_t reply_error;
 653                 uint32_t req_message;
 654                 uint32_t req_control;
 655                 uint32_t reply_control;
 656         } node;
 657         struct {
 658                 uint32_t req_call;
 659                 uint32_t req_message;
 660                 uint32_t req_control;
 661         } client;
 662         struct {
 663                 uint32_t call;
 664                 uint32_t control;
 665                 uint32_t traverse;
 666         } timeouts;
 667         struct {
 668                 struct latency_counter ctdbd;
 669                 struct latency_counter recd;
 670         } reclock;
 671         struct {
 672                 uint32_t num_calls;
 673                 uint32_t num_current;
 674                 uint32_t num_pending;
 675                 uint32_t num_failed;
 676                 struct latency_counter latency;
 677                 uint32_t buckets[MAX_COUNT_BUCKETS];
 678         } locks;
 679         uint32_t total_calls;
 680         uint32_t pending_calls;
 681         uint32_t childwrite_calls;
 682         uint32_t pending_childwrite_calls;
 683         uint32_t memory_used;
 684         uint32_t __last_counter; /* hack for control_statistics_all */
 685         uint32_t max_hop_count;
 686         uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
 687         struct latency_counter call_latency;
 688         struct latency_counter childwrite_latency;
 689         uint32_t num_recoveries;
 690         struct timeval statistics_start_time;
 691         struct timeval statistics_current_time;
 692         uint32_t total_ro_delegations;
 693         uint32_t total_ro_revokes;
 694 };
 695
 696 /*
 697  * wire format for statistics history
 698  */
 699 struct ctdb_statistics_wire {
 700         uint32_t num;
 701         struct ctdb_statistics stats[1];
 702 };
 703
 704 /*
 705  * db statistics
 706  */
 707 struct ctdb_db_statistics {
 708         struct {
 709                 uint32_t num_calls;
 710                 uint32_t num_current;
 711                 uint32_t num_pending;
 712                 uint32_t num_failed;
 713                 struct latency_counter latency;
 714                 uint32_t buckets[MAX_COUNT_BUCKETS];
 715         } locks;
 716         uint32_t db_ro_delegations;
 717         uint32_t db_ro_revokes;
 718         uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
 719         uint32_t num_hot_keys;
 720         struct {
 721                 uint32_t count;
 722                 TDB_DATA key;
 723         } hot_keys[MAX_HOT_KEYS];
 724         char hot_keys_wire[1];
 725 };
 726
 727 /*
 728  * wire format for interface list
 729  */
 730 #ifdef IFNAMSIZ
 731 #define CTDB_IFACE_SIZE IFNAMSIZ
 732 #else
 733 #define CTDB_IFACE_SIZE 16
 734 #endif
 735
 736 struct ctdb_iface_info {
 737         char name[CTDB_IFACE_SIZE+2];
 738         uint16_t link_state;
 739         uint32_t references;
 740 };
 741
 742 struct ctdb_ifaces_list {
 743         uint32_t num;
 744         struct ctdb_iface_info ifaces[1];
 745 };
 746
 747 #define INVALID_GENERATION 1
 748 /* table that contains the mapping between a hash value and lmaster
 749  */
 750 struct ctdb_vnn_map {
 751         uint32_t generation;
 752         uint32_t size;
 753         uint32_t *map;
 754 };
 755
 756 /*
 757    a wire representation of the vnn map
 758  */
 759 struct ctdb_vnn_map_wire {
 760         uint32_t generation;
 761         uint32_t size;
 762         uint32_t map[1];
 763 };
 764
 765 #endif