ctdb/protocol/protocol.h

   1 /*
   2    CTDB protocol marshalling
   3
   4    Copyright (C) Amitay Isaacs  2015
   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 #include <tdb.h>
  24
  25 #define CTDB_MAGIC      0x43544442 /* CTDB */
  26 #define CTDB_PROTOCOL   1
  27
  28 enum ctdb_operation {
  29         CTDB_REQ_CALL           = 0,
  30         CTDB_REPLY_CALL         = 1,
  31         CTDB_REQ_DMASTER        = 2,
  32         CTDB_REPLY_DMASTER      = 3,
  33         CTDB_REPLY_ERROR        = 4,
  34         CTDB_REQ_MESSAGE        = 5,
  35         /* #6 removed */
  36         CTDB_REQ_CONTROL        = 7,
  37         CTDB_REPLY_CONTROL      = 8,
  38         CTDB_REQ_KEEPALIVE      = 9,
  39         CTDB_REQ_TUNNEL         = 10,
  40 };
  41
  42 /* used on the domain socket, send a pdu to the local daemon */
  43 #define CTDB_CURRENT_NODE     0xF0000001
  44 /* send a broadcast to all nodes in the cluster, active or not */
  45 #define CTDB_BROADCAST_ALL    0xF0000002
  46 /* send a broadcast to all nodes in the current vnn map */
  47 #define CTDB_BROADCAST_ACTIVE 0xF0000003
  48 /* send a broadcast to all connected nodes */
  49 #define CTDB_BROADCAST_CONNECTED 0xF0000004
  50 /* send a broadcast to selected connected nodes */
  51 #define CTDB_MULTICAST 0xF0000005
  52
  53 #define CTDB_UNKNOWN_PNN        0xFFFFFFFF
  54
  55 /* the key used to store persistent db sequence number */
  56 #define CTDB_DB_SEQNUM_KEY "__db_sequence_number__"
  57
  58 struct ctdb_req_header {
  59         uint32_t length;
  60         uint32_t ctdb_magic;
  61         uint32_t ctdb_version;
  62         uint32_t generation;
  63         uint32_t operation;
  64         uint32_t destnode;
  65         uint32_t srcnode;
  66         uint32_t reqid;
  67 };
  68
  69 struct ctdb_req_call {
  70         uint32_t flags;
  71         uint32_t db_id;
  72         uint32_t callid;
  73         uint32_t hopcount;
  74         TDB_DATA key;
  75         TDB_DATA calldata;
  76 };
  77
  78 struct ctdb_reply_call {
  79         int32_t status;
  80         TDB_DATA data;
  81 };
  82
  83 struct ctdb_reply_error {
  84         int32_t status;
  85         TDB_DATA msg;
  86 };
  87
  88 struct ctdb_req_dmaster {
  89         uint32_t db_id;
  90         uint64_t rsn;
  91         uint32_t dmaster;
  92         TDB_DATA key;
  93         TDB_DATA data;
  94 };
  95
  96 struct ctdb_reply_dmaster {
  97         uint32_t db_id;
  98         uint64_t rsn;
  99         TDB_DATA key;
 100         TDB_DATA data;
 101 };
 102
 103 #define CTDB_NULL_FUNC                  0xFF000001
 104 #define CTDB_FETCH_FUNC                 0xFF000002
 105 #define CTDB_FETCH_WITH_HEADER_FUNC     0xFF000003
 106
 107 struct ctdb_call {
 108         int call_id;
 109         TDB_DATA key;
 110         TDB_DATA call_data;
 111         TDB_DATA reply_data;
 112         uint32_t status;
 113 #define CTDB_IMMEDIATE_MIGRATION                0x00000001
 114 #define CTDB_CALL_FLAG_VACUUM_MIGRATION         0x00000002
 115 #define CTDB_WANT_READONLY                      0x00000004
 116         uint32_t flags;
 117 };
 118
 119 /* SRVID to catch all messages */
 120 #define CTDB_SRVID_ALL (~(uint64_t)0)
 121
 122 /* SRVID prefix used during recovery for pulling and pushing databases */
 123 #define CTDB_SRVID_RECOVERY     0xF001000000000000LL
 124
 125 /* SRVID to assign of banning credits */
 126 #define CTDB_SRVID_BANNING      0xF002000000000000LL
 127
 128 /* SRVID to inform of election data */
 129 #define CTDB_SRVID_ELECTION     0xF100000000000000LL
 130
 131 /* SRVID to inform clients that the cluster has been reconfigured */
 132 #define CTDB_SRVID_RECONFIGURE 0xF200000000000000LL
 133
 134 /* SRVID to inform clients an IP address has been released */
 135 #define CTDB_SRVID_RELEASE_IP 0xF300000000000000LL
 136
 137 /* SRVID to inform clients that an IP address has been taken over */
 138 #define CTDB_SRVID_TAKE_IP 0xF301000000000000LL
 139
 140 /* SRVID to inform recovery daemon of the node flags */
 141 #define CTDB_SRVID_SET_NODE_FLAGS 0xF400000000000000LL
 142
 143 /* SRVID to inform recovery daemon to update public ip assignment */
 144 #define CTDB_SRVID_RECD_UPDATE_IP 0xF500000000000000LL
 145
 146 /* SRVID to inform recovery daemon to migrate a set of records */
 147 #define CTDB_SRVID_VACUUM_FETCH 0xF700000000000000LL
 148
 149 /* SRVID to inform recovery daemon to detach a database */
 150 #define CTDB_SRVID_DETACH_DATABASE 0xF701000000000000LL
 151
 152 /* SRVID to inform recovery daemon to dump talloc memdump to the log */
 153 #define CTDB_SRVID_MEM_DUMP 0xF800000000000000LL
 154
 155 /* SRVID to inform recovery daemon to send logs */
 156 #define CTDB_SRVID_GETLOG  0xF801000000000000LL
 157
 158 /* SRVID to inform recovery daemon to clear logs */
 159 #define CTDB_SRVID_CLEARLOG  0xF802000000000000LL
 160
 161 /* SRVID to inform recovery daemon to push the node flags to other nodes */
 162 #define CTDB_SRVID_PUSH_NODE_FLAGS 0xF900000000000000LL
 163
 164 /* SRVID to inform recovery daemon to reload the nodes file */
 165 #define CTDB_SRVID_RELOAD_NODES 0xFA00000000000000LL
 166
 167 /* SRVID to inform recovery daemon to perform a takeover run */
 168 #define CTDB_SRVID_TAKEOVER_RUN 0xFB00000000000000LL
 169
 170 /* SRVID to inform recovery daemon to rebalance ips for a node.  */
 171 #define CTDB_SRVID_REBALANCE_NODE 0xFB01000000000000LL
 172
 173 /* SRVID to inform recovery daemon to stop takeover runs from occurring */
 174 #define CTDB_SRVID_DISABLE_TAKEOVER_RUNS 0xFB03000000000000LL
 175
 176 /* SRVID to inform recovery daemon to stop recoveries from occurring */
 177 #define CTDB_SRVID_DISABLE_RECOVERIES 0xFB04000000000000LL
 178
 179 /* SRVID to inform recovery daemon to disable the public ip checks */
 180 #define CTDB_SRVID_DISABLE_IP_CHECK  0xFC00000000000000LL
 181
 182 /* A range of ports reserved for registering a PID (top 8 bits)
 183  * All ports matching the 8 top bits are reserved for exclusive use by
 184  * registering a SRVID that matches the process-id of the requesting process
 185  */
 186 #define CTDB_SRVID_PID_RANGE   0x0000000000000000LL
 187
 188 /* A range of ports reserved for samba (top 8 bits)
 189  * All ports matching the 8 top bits are reserved for exclusive use by
 190  * CIFS server
 191  */
 192 #define CTDB_SRVID_SAMBA_NOTIFY  0xFE00000000000000LL
 193 #define CTDB_SRVID_SAMBA_RANGE   0xFE00000000000000LL
 194
 195 /* A range of ports reserved for a CTDB NFS server (top 8 bits)
 196  * All ports matching the 8 top bits are reserved for exclusive use by
 197  * NFS server
 198  */
 199 #define CTDB_SRVID_NFSD_RANGE  0xEE00000000000000LL
 200
 201 /* A range of ports reserved for a CTDB ISCSI server (top 8 bits)
 202  * All ports matching the 8 top bits are reserved for exclusive use by
 203  * ISCSI server
 204  */
 205 #define CTDB_SRVID_ISCSID_RANGE  0xDE00000000000000LL
 206
 207 /* A range of ports reserved for CTDB tool (top 8 bits)
 208  * All ports matching the 8 top bits are reserved for exclusive use by
 209  * CTDB tool
 210  */
 211 #define CTDB_SRVID_TOOL_RANGE  0xCE00000000000000LL
 212
 213 /* A range of ports reserved by client (top 8 bits)
 214  * All ports matching the 8 top bits are reserved for exclusive use by
 215  * CTDB client code
 216  */
 217 #define CTDB_SRVID_CLIENT_RANGE  0xBE00000000000000LL
 218
 219 /* Range of ports reserved for test applications (top 8 bits)
 220  * All ports matching the 8 top bits are reserved for exclusive use by
 221  * test applications
 222  */
 223 #define CTDB_SRVID_TEST_RANGE  0xAE00000000000000LL
 224
 225
 226 enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS          = 0,
 227                     CTDB_CONTROL_STATISTICS              = 1,
 228                     /* #2 removed */
 229                     CTDB_CONTROL_PING                    = 3,
 230                     CTDB_CONTROL_GETDBPATH               = 4,
 231                     CTDB_CONTROL_GETVNNMAP               = 5,
 232                     CTDB_CONTROL_SETVNNMAP               = 6,
 233                     CTDB_CONTROL_GET_DEBUG               = 7,
 234                     CTDB_CONTROL_SET_DEBUG               = 8,
 235                     CTDB_CONTROL_GET_DBMAP               = 9,
 236                     CTDB_CONTROL_GET_NODEMAPv4           = 10, /* obsolete */
 237                     CTDB_CONTROL_SET_DMASTER             = 11, /* obsolete */
 238                     /* #12 removed */
 239                     CTDB_CONTROL_PULL_DB                 = 13,
 240                     CTDB_CONTROL_PUSH_DB                 = 14,
 241                     CTDB_CONTROL_GET_RECMODE             = 15,
 242                     CTDB_CONTROL_SET_RECMODE             = 16,
 243                     CTDB_CONTROL_STATISTICS_RESET        = 17,
 244                     CTDB_CONTROL_DB_ATTACH               = 18,
 245                     CTDB_CONTROL_SET_CALL                = 19, /* obsolete */
 246                     CTDB_CONTROL_TRAVERSE_START          = 20,
 247                     CTDB_CONTROL_TRAVERSE_ALL            = 21,
 248                     CTDB_CONTROL_TRAVERSE_DATA           = 22,
 249                     CTDB_CONTROL_REGISTER_SRVID          = 23,
 250                     CTDB_CONTROL_DEREGISTER_SRVID        = 24,
 251                     CTDB_CONTROL_GET_DBNAME              = 25,
 252                     CTDB_CONTROL_ENABLE_SEQNUM           = 26,
 253                     CTDB_CONTROL_UPDATE_SEQNUM           = 27,
 254                     /* #28 removed */
 255                     CTDB_CONTROL_DUMP_MEMORY             = 29,
 256                     CTDB_CONTROL_GET_PID                 = 30,
 257                     CTDB_CONTROL_GET_RECMASTER           = 31,
 258                     CTDB_CONTROL_SET_RECMASTER           = 32,
 259                     CTDB_CONTROL_FREEZE                  = 33,
 260                     CTDB_CONTROL_THAW                    = 34, /* obsolete */
 261                     CTDB_CONTROL_GET_PNN                 = 35,
 262                     CTDB_CONTROL_SHUTDOWN                = 36,
 263                     CTDB_CONTROL_GET_MONMODE             = 37, /* obsolete */
 264                     /* #38 removed */
 265                     /* #39 removed */
 266                     /* #40 removed */
 267                     /* #41 removed */
 268                     CTDB_CONTROL_TAKEOVER_IPv4           = 42, /* obsolete */
 269                     CTDB_CONTROL_RELEASE_IPv4            = 43, /* obsolete */
 270                     CTDB_CONTROL_TCP_CLIENT              = 44,
 271                     CTDB_CONTROL_TCP_ADD                 = 45,
 272                     CTDB_CONTROL_TCP_REMOVE              = 46,
 273                     CTDB_CONTROL_STARTUP                 = 47,
 274                     CTDB_CONTROL_SET_TUNABLE             = 48,
 275                     CTDB_CONTROL_GET_TUNABLE             = 49,
 276                     CTDB_CONTROL_LIST_TUNABLES           = 50,
 277                     CTDB_CONTROL_GET_PUBLIC_IPSv4        = 51, /* obsolete */
 278                     CTDB_CONTROL_MODIFY_FLAGS            = 52,
 279                     CTDB_CONTROL_GET_ALL_TUNABLES        = 53,
 280                     CTDB_CONTROL_KILL_TCP                = 54, /* obsolete */
 281                     CTDB_CONTROL_GET_TCP_TICKLE_LIST     = 55,
 282                     CTDB_CONTROL_SET_TCP_TICKLE_LIST     = 56,
 283                     CTDB_CONTROL_REGISTER_SERVER_ID      = 57, /* obsolete */
 284                     CTDB_CONTROL_UNREGISTER_SERVER_ID    = 58, /* obsolete */
 285                     CTDB_CONTROL_CHECK_SERVER_ID         = 59, /* obsolete */
 286                     CTDB_CONTROL_GET_SERVER_ID_LIST      = 60, /* obsolete */
 287                     CTDB_CONTROL_DB_ATTACH_PERSISTENT    = 61,
 288                     CTDB_CONTROL_PERSISTENT_STORE        = 62, /* obsolete */
 289                     CTDB_CONTROL_UPDATE_RECORD           = 63,
 290                     CTDB_CONTROL_SEND_GRATUITOUS_ARP     = 64,
 291                     CTDB_CONTROL_TRANSACTION_START       = 65, /* obsolete */
 292                     CTDB_CONTROL_TRANSACTION_COMMIT      = 66, /* obsolete */
 293                     CTDB_CONTROL_WIPE_DATABASE           = 67,
 294                     /* #68 removed */
 295                     CTDB_CONTROL_UPTIME                  = 69,
 296                     CTDB_CONTROL_START_RECOVERY          = 70,
 297                     CTDB_CONTROL_END_RECOVERY            = 71,
 298                     CTDB_CONTROL_RELOAD_NODES_FILE       = 72,
 299                     /* #73 removed */
 300                     CTDB_CONTROL_TRY_DELETE_RECORDS      = 74,
 301                     CTDB_CONTROL_ENABLE_MONITOR          = 75, /* obsolete */
 302                     CTDB_CONTROL_DISABLE_MONITOR         = 76, /* obsolete */
 303                     CTDB_CONTROL_ADD_PUBLIC_IP           = 77,
 304                     CTDB_CONTROL_DEL_PUBLIC_IP           = 78,
 305                     CTDB_CONTROL_RUN_EVENTSCRIPTS        = 79, /* obsolete */
 306                     CTDB_CONTROL_GET_CAPABILITIES        = 80,
 307                     CTDB_CONTROL_START_PERSISTENT_UPDATE = 81, /* obsolete */
 308                     CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE= 82, /* obsolete */
 309                     CTDB_CONTROL_TRANS2_COMMIT           = 83, /* obsolete */
 310                     CTDB_CONTROL_TRANS2_FINISHED         = 84, /* obsolete */
 311                     CTDB_CONTROL_TRANS2_ERROR            = 85, /* obsolete */
 312                     CTDB_CONTROL_TRANS2_COMMIT_RETRY     = 86, /* obsolete */
 313                     CTDB_CONTROL_RECD_PING               = 87,
 314                     CTDB_CONTROL_RELEASE_IP              = 88,
 315                     CTDB_CONTROL_TAKEOVER_IP             = 89,
 316                     CTDB_CONTROL_GET_PUBLIC_IPS          = 90,
 317                     CTDB_CONTROL_GET_NODEMAP             = 91,
 318                     /* missing */
 319                     CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS = 96, /* obsolete */
 320                     CTDB_CONTROL_TRAVERSE_KILL           = 97,
 321                     CTDB_CONTROL_RECD_RECLOCK_LATENCY    = 98,
 322                     CTDB_CONTROL_GET_RECLOCK_FILE        = 99,
 323                     CTDB_CONTROL_SET_RECLOCK_FILE        = 100, /* obsolete */
 324                     CTDB_CONTROL_STOP_NODE               = 101,
 325                     CTDB_CONTROL_CONTINUE_NODE           = 102,
 326                     CTDB_CONTROL_SET_NATGWSTATE          = 103, /* obsolete */
 327                     CTDB_CONTROL_SET_LMASTERROLE         = 104,
 328                     CTDB_CONTROL_SET_RECMASTERROLE       = 105,
 329                     CTDB_CONTROL_ENABLE_SCRIPT           = 107, /* obsolete */
 330                     CTDB_CONTROL_DISABLE_SCRIPT          = 108, /* obsolete */
 331                     CTDB_CONTROL_SET_BAN_STATE           = 109,
 332                     CTDB_CONTROL_GET_BAN_STATE           = 110,
 333                     CTDB_CONTROL_SET_DB_PRIORITY         = 111, /* obsolete */
 334                     CTDB_CONTROL_GET_DB_PRIORITY         = 112, /* obsolete */
 335                     CTDB_CONTROL_TRANSACTION_CANCEL      = 113, /* obsolete */
 336                     CTDB_CONTROL_REGISTER_NOTIFY         = 114,
 337                     CTDB_CONTROL_DEREGISTER_NOTIFY       = 115,
 338                     CTDB_CONTROL_TRANS2_ACTIVE           = 116, /* obsolete */
 339                     CTDB_CONTROL_GET_LOG                 = 117, /* obsolete */
 340                     CTDB_CONTROL_CLEAR_LOG               = 118, /* obsolete */
 341                     CTDB_CONTROL_TRANS3_COMMIT           = 119,
 342                     CTDB_CONTROL_GET_DB_SEQNUM           = 120,
 343                     CTDB_CONTROL_DB_SET_HEALTHY          = 121,
 344                     CTDB_CONTROL_DB_GET_HEALTH           = 122,
 345                     CTDB_CONTROL_GET_PUBLIC_IP_INFO      = 123,
 346                     CTDB_CONTROL_GET_IFACES              = 124,
 347                     CTDB_CONTROL_SET_IFACE_LINK_STATE    = 125,
 348                     CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE  = 126,
 349                     CTDB_CONTROL_GET_STAT_HISTORY        = 127,
 350                     CTDB_CONTROL_SCHEDULE_FOR_DELETION   = 128,
 351                     CTDB_CONTROL_SET_DB_READONLY         = 129,
 352                     CTDB_CONTROL_CHECK_SRVIDS            = 130, /* obsolete */
 353                     CTDB_CONTROL_TRAVERSE_START_EXT      = 131,
 354                     CTDB_CONTROL_GET_DB_STATISTICS       = 132,
 355                     CTDB_CONTROL_SET_DB_STICKY           = 133,
 356                     CTDB_CONTROL_RELOAD_PUBLIC_IPS       = 134,
 357                     CTDB_CONTROL_TRAVERSE_ALL_EXT        = 135,
 358                     CTDB_CONTROL_RECEIVE_RECORDS         = 136,
 359                     CTDB_CONTROL_IPREALLOCATED           = 137,
 360                     CTDB_CONTROL_GET_RUNSTATE            = 138,
 361                     CTDB_CONTROL_DB_DETACH               = 139,
 362                     CTDB_CONTROL_GET_NODES_FILE          = 140,
 363                     CTDB_CONTROL_DB_FREEZE               = 141,
 364                     CTDB_CONTROL_DB_THAW                 = 142,
 365                     CTDB_CONTROL_DB_TRANSACTION_START    = 143,
 366                     CTDB_CONTROL_DB_TRANSACTION_COMMIT   = 144,
 367                     CTDB_CONTROL_DB_TRANSACTION_CANCEL   = 145,
 368                     CTDB_CONTROL_DB_PULL                 = 146,
 369                     CTDB_CONTROL_DB_PUSH_START           = 147,
 370                     CTDB_CONTROL_DB_PUSH_CONFIRM         = 148,
 371                     CTDB_CONTROL_DB_OPEN_FLAGS           = 149,
 372                     CTDB_CONTROL_DB_ATTACH_REPLICATED    = 150,
 373                     CTDB_CONTROL_CHECK_PID_SRVID         = 151,
 374                     CTDB_CONTROL_TUNNEL_REGISTER         = 152,
 375                     CTDB_CONTROL_TUNNEL_DEREGISTER       = 153,
 376 };
 377
 378 #define MAX_COUNT_BUCKETS 16
 379 #define MAX_HOT_KEYS      10
 380
 381 struct ctdb_latency_counter {
 382         int num;
 383         double min;
 384         double max;
 385         double total;
 386 };
 387
 388 struct ctdb_statistics {
 389         uint32_t num_clients;
 390         uint32_t frozen;
 391         uint32_t recovering;
 392         uint32_t client_packets_sent;
 393         uint32_t client_packets_recv;
 394         uint32_t node_packets_sent;
 395         uint32_t node_packets_recv;
 396         uint32_t keepalive_packets_sent;
 397         uint32_t keepalive_packets_recv;
 398         struct {
 399                 uint32_t req_call;
 400                 uint32_t reply_call;
 401                 uint32_t req_dmaster;
 402                 uint32_t reply_dmaster;
 403                 uint32_t reply_error;
 404                 uint32_t req_message;
 405                 uint32_t req_control;
 406                 uint32_t reply_control;
 407                 uint32_t req_tunnel;
 408         } node;
 409         struct {
 410                 uint32_t req_call;
 411                 uint32_t req_message;
 412                 uint32_t req_control;
 413                 uint32_t req_tunnel;
 414         } client;
 415         struct {
 416                 uint32_t call;
 417                 uint32_t control;
 418                 uint32_t traverse;
 419         } timeouts;
 420         struct {
 421                 struct ctdb_latency_counter ctdbd;
 422                 struct ctdb_latency_counter recd;
 423         } reclock;
 424         struct {
 425                 uint32_t num_calls;
 426                 uint32_t num_current;
 427                 uint32_t num_pending;
 428                 uint32_t num_failed;
 429                 struct ctdb_latency_counter latency;
 430                 uint32_t buckets[MAX_COUNT_BUCKETS];
 431         } locks;
 432         uint32_t total_calls;
 433         uint32_t pending_calls;
 434         uint32_t childwrite_calls;
 435         uint32_t pending_childwrite_calls;
 436         uint32_t memory_used;
 437         uint32_t __last_counter; /* hack */
 438         uint32_t max_hop_count;
 439         uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
 440         struct ctdb_latency_counter call_latency;
 441         struct ctdb_latency_counter childwrite_latency;
 442         uint32_t num_recoveries;
 443         struct timeval statistics_start_time;
 444         struct timeval statistics_current_time;
 445         uint32_t total_ro_delegations;
 446         uint32_t total_ro_revokes;
 447 };
 448
 449 #define INVALID_GENERATION 1
 450 /* table that contains the mapping between a hash value and lmaster
 451  */
 452 struct ctdb_vnn_map {
 453         uint32_t generation;
 454         uint32_t size;
 455         uint32_t *map;
 456 };
 457
 458 struct ctdb_dbid {
 459         uint32_t db_id;
 460 #define CTDB_DB_FLAGS_PERSISTENT        0x01
 461 #define CTDB_DB_FLAGS_READONLY          0x02
 462 #define CTDB_DB_FLAGS_STICKY            0x04
 463 #define CTDB_DB_FLAGS_REPLICATED        0x08
 464         uint8_t flags;
 465 };
 466
 467 struct ctdb_dbid_map {
 468         uint32_t num;
 469         struct ctdb_dbid *dbs;
 470 };
 471
 472 struct ctdb_pulldb {
 473         uint32_t db_id;
 474 #define CTDB_LMASTER_ANY        0xffffffff
 475         uint32_t lmaster;
 476 };
 477
 478 struct ctdb_pulldb_ext {
 479         uint32_t db_id;
 480         uint32_t lmaster;
 481         uint64_t srvid;
 482 };
 483
 484 #define CTDB_RECOVERY_NORMAL            0
 485 #define CTDB_RECOVERY_ACTIVE            1
 486
 487 /*
 488   the extended header for records in the ltdb
 489 */
 490 struct ctdb_ltdb_header {
 491         uint64_t rsn;
 492         uint32_t dmaster;
 493         uint32_t reserved1;
 494 #define CTDB_REC_FLAG_DEFAULT                   0x00000000
 495 #define CTDB_REC_FLAG_MIGRATED_WITH_DATA        0x00010000
 496 #define CTDB_REC_FLAG_VACUUM_MIGRATED           0x00020000
 497 #define CTDB_REC_FLAG_AUTOMATIC                 0x00040000
 498 #define CTDB_REC_RO_HAVE_DELEGATIONS            0x01000000
 499 #define CTDB_REC_RO_HAVE_READONLY               0x02000000
 500 #define CTDB_REC_RO_REVOKING_READONLY           0x04000000
 501 #define CTDB_REC_RO_REVOKE_COMPLETE             0x08000000
 502 #define CTDB_REC_RO_FLAGS                       (CTDB_REC_RO_HAVE_DELEGATIONS|\
 503                                                  CTDB_REC_RO_HAVE_READONLY|\
 504                                                  CTDB_REC_RO_REVOKING_READONLY|\
 505                                                  CTDB_REC_RO_REVOKE_COMPLETE)
 506         uint32_t flags;
 507 };
 508
 509 struct ctdb_rec_data {
 510         uint32_t reqid;
 511         struct ctdb_ltdb_header *header;
 512         TDB_DATA key, data;
 513 };
 514
 515 struct ctdb_rec_buffer {
 516         uint32_t db_id;
 517         uint32_t count;
 518         uint8_t *buf;
 519         size_t buflen;
 520 };
 521
 522 typedef int (*ctdb_rec_parser_func_t)(uint32_t reqid,
 523                                       struct ctdb_ltdb_header *header,
 524                                       TDB_DATA key, TDB_DATA data,
 525                                       void *private_data);
 526
 527 struct ctdb_traverse_start {
 528         uint32_t db_id;
 529         uint32_t reqid;
 530         uint64_t srvid;
 531 };
 532
 533 struct ctdb_traverse_all {
 534         uint32_t db_id;
 535         uint32_t reqid;
 536         uint32_t pnn;
 537         uint32_t client_reqid;
 538         uint64_t srvid;
 539 };
 540
 541 struct ctdb_traverse_start_ext {
 542         uint32_t db_id;
 543         uint32_t reqid;
 544         uint64_t srvid;
 545         bool withemptyrecords;
 546 };
 547
 548 struct ctdb_traverse_all_ext {
 549         uint32_t db_id;
 550         uint32_t reqid;
 551         uint32_t pnn;
 552         uint32_t client_reqid;
 553         uint64_t srvid;
 554         bool withemptyrecords;
 555 };
 556
 557 typedef union {
 558         struct sockaddr sa;
 559         struct sockaddr_in ip;
 560         struct sockaddr_in6 ip6;
 561 } ctdb_sock_addr;
 562
 563 struct ctdb_connection {
 564         union {
 565                 ctdb_sock_addr src;
 566                 ctdb_sock_addr server;
 567         };
 568         union {
 569                 ctdb_sock_addr dst;
 570                 ctdb_sock_addr client;
 571         };
 572 };
 573
 574 struct ctdb_connection_list {
 575         uint32_t num;
 576         struct ctdb_connection *conn;
 577 };
 578
 579 struct ctdb_tunable {
 580         const char *name;
 581         uint32_t value;
 582 };
 583
 584 struct ctdb_var_list {
 585         int count;
 586         const char **var;
 587 };
 588
 589 struct ctdb_node_flag_change {
 590         uint32_t pnn;
 591         uint32_t new_flags;
 592         uint32_t old_flags;
 593 };
 594
 595 /* all tunable variables go in here */
 596 struct ctdb_tunable_list {
 597         uint32_t max_redirect_count;
 598         uint32_t seqnum_interval; /* unit is ms */
 599         uint32_t control_timeout;
 600         uint32_t traverse_timeout;
 601         uint32_t keepalive_interval;
 602         uint32_t keepalive_limit;
 603         uint32_t recover_timeout;
 604         uint32_t recover_interval;
 605         uint32_t election_timeout;
 606         uint32_t takeover_timeout;
 607         uint32_t monitor_interval;
 608         uint32_t tickle_update_interval;
 609         uint32_t script_timeout;
 610         uint32_t monitor_timeout_count; /* allow dodgy scripts to hang this many times in a row before we mark the node unhealthy */
 611         uint32_t script_unhealthy_on_timeout; /* obsolete */
 612         uint32_t recovery_grace_period;
 613         uint32_t recovery_ban_period;
 614         uint32_t database_hash_size;
 615         uint32_t database_max_dead;
 616         uint32_t rerecovery_timeout;
 617         uint32_t enable_bans;
 618         uint32_t deterministic_public_ips;
 619         uint32_t reclock_ping_period;
 620         uint32_t no_ip_failback;
 621         uint32_t disable_ip_failover;
 622         uint32_t verbose_memory_names;
 623         uint32_t recd_ping_timeout;
 624         uint32_t recd_ping_failcount;
 625         uint32_t log_latency_ms;
 626         uint32_t reclock_latency_ms;
 627         uint32_t recovery_drop_all_ips;
 628         uint32_t verify_recovery_lock;
 629         uint32_t vacuum_interval;
 630         uint32_t vacuum_max_run_time;
 631         uint32_t repack_limit;
 632         uint32_t vacuum_limit;
 633         uint32_t max_queue_depth_drop_msg;
 634         uint32_t allow_unhealthy_db_read;
 635         uint32_t stat_history_interval;
 636         uint32_t deferred_attach_timeout;
 637         uint32_t vacuum_fast_path_count;
 638         uint32_t lcp2_public_ip_assignment;
 639         uint32_t allow_client_db_attach;
 640         uint32_t recover_pdb_by_seqnum;
 641         uint32_t deferred_rebalance_on_node_add;
 642         uint32_t fetch_collapse;
 643         uint32_t hopcount_make_sticky;
 644         uint32_t sticky_duration;
 645         uint32_t sticky_pindown;
 646         uint32_t no_ip_takeover;
 647         uint32_t db_record_count_warn;
 648         uint32_t db_record_size_warn;
 649         uint32_t db_size_warn;
 650         uint32_t pulldb_preallocation_size;
 651         uint32_t no_ip_host_on_all_disabled;
 652         uint32_t samba3_hack;
 653         uint32_t mutex_enabled;
 654         uint32_t lock_processes_per_db;
 655         uint32_t rec_buffer_size_limit;
 656         uint32_t queue_buffer_size;
 657         uint32_t ip_alloc_algorithm;
 658         uint32_t allow_mixed_versions;
 659 };
 660
 661 struct ctdb_tickle_list {
 662         ctdb_sock_addr addr;
 663         uint32_t num;
 664         struct ctdb_connection *conn;
 665 };
 666
 667 struct ctdb_addr_info {
 668         ctdb_sock_addr addr;
 669         uint32_t mask;
 670         const char *iface;
 671 };
 672
 673 struct ctdb_transdb {
 674         uint32_t db_id;
 675         uint32_t tid;
 676 };
 677
 678 struct ctdb_uptime {
 679         struct timeval current_time;
 680         struct timeval ctdbd_start_time;
 681         struct timeval last_recovery_started;
 682         struct timeval last_recovery_finished;
 683 };
 684
 685 struct ctdb_public_ip {
 686         uint32_t pnn;
 687         ctdb_sock_addr addr;
 688 };
 689
 690 struct ctdb_public_ip_list {
 691         uint32_t num;
 692         struct ctdb_public_ip *ip;
 693 };
 694
 695 /*
 696  * Node flags
 697  */
 698 #define NODE_FLAGS_DISCONNECTED         0x00000001 /* node isn't connected */
 699 #define NODE_FLAGS_UNHEALTHY            0x00000002 /* monitoring says node is unhealthy */
 700 #define NODE_FLAGS_PERMANENTLY_DISABLED 0x00000004 /* administrator has disabled node */
 701 #define NODE_FLAGS_BANNED               0x00000008 /* recovery daemon has banned the node */
 702 #define NODE_FLAGS_DELETED              0x00000010 /* this node has been deleted */
 703 #define NODE_FLAGS_STOPPED              0x00000020 /* this node has been stopped */
 704 #define NODE_FLAGS_DISABLED             (NODE_FLAGS_UNHEALTHY|NODE_FLAGS_PERMANENTLY_DISABLED)
 705 #define NODE_FLAGS_INACTIVE             (NODE_FLAGS_DELETED|NODE_FLAGS_DISCONNECTED|NODE_FLAGS_BANNED|NODE_FLAGS_STOPPED)
 706
 707 /*
 708  * Node capabilities
 709  */
 710 #define CTDB_CAP_RECMASTER              0x00000001
 711 #define CTDB_CAP_LMASTER                0x00000002
 712 #define CTDB_CAP_LVS                    0x00000004 /* obsolete */
 713 #define CTDB_CAP_NATGW                  0x00000008 /* obsolete */
 714
 715 /*
 716  * Node features
 717  */
 718 #define CTDB_CAP_PARALLEL_RECOVERY      0x00010000
 719 #define CTDB_CAP_FRAGMENTED_CONTROLS    0x00020000
 720
 721 #define CTDB_CAP_FEATURES               (CTDB_CAP_PARALLEL_RECOVERY | \
 722                                          CTDB_CAP_FRAGMENTED_CONTROLS)
 723
 724 #define CTDB_CAP_DEFAULT                (CTDB_CAP_RECMASTER | \
 725                                          CTDB_CAP_LMASTER   | \
 726                                          CTDB_CAP_FEATURES)
 727
 728 struct ctdb_node_and_flags {
 729         uint32_t pnn;
 730         uint32_t flags;
 731         ctdb_sock_addr addr;
 732 };
 733
 734 struct ctdb_node_map {
 735         uint32_t num;
 736         struct ctdb_node_and_flags *node;
 737 };
 738
 739 enum ctdb_event {
 740         CTDB_EVENT_INIT,                /* CTDB starting up: no args */
 741         CTDB_EVENT_SETUP,               /* CTDB starting up after transport is readdy: no args. */
 742         CTDB_EVENT_STARTUP,             /* CTDB starting up after initial recovery: no args. */
 743         CTDB_EVENT_START_RECOVERY,      /* CTDB recovery starting: no args. */
 744         CTDB_EVENT_RECOVERED,           /* CTDB recovery finished: no args. */
 745         CTDB_EVENT_TAKE_IP,             /* IP taken: interface, IP address, netmask bits. */
 746         CTDB_EVENT_RELEASE_IP,          /* IP released: interface, IP address, netmask bits. */
 747         CTDB_EVENT_STOPPED,             /* Deprecated, do not use. */
 748         CTDB_EVENT_MONITOR,             /* Please check if service is healthy: no args. */
 749         CTDB_EVENT_STATUS,              /* Deprecated, do not use. */
 750         CTDB_EVENT_SHUTDOWN,            /* CTDB shutting down: no args. */
 751         CTDB_EVENT_RELOAD,              /* Deprecated, do not use */
 752         CTDB_EVENT_UPDATE_IP,           /* IP updating: old interface, new interface, IP address, netmask bits. */
 753         CTDB_EVENT_IPREALLOCATED,       /* when a takeover_run() completes */
 754         CTDB_EVENT_MAX
 755 };
 756
 757 #define MAX_SCRIPT_NAME 31
 758 #define MAX_SCRIPT_OUTPUT 511
 759
 760 struct ctdb_script {
 761         char name[MAX_SCRIPT_NAME+1];
 762         struct timeval start;
 763         struct timeval finished;
 764         int32_t status;
 765         char output[MAX_SCRIPT_OUTPUT+1];
 766 };
 767
 768 struct ctdb_script_list {
 769         uint32_t num_scripts;
 770         struct ctdb_script *script;
 771 };
 772
 773 struct ctdb_ban_state {
 774         uint32_t pnn;
 775         uint32_t time;
 776 };
 777
 778 struct ctdb_notify_data {
 779         uint64_t srvid;
 780         TDB_DATA data;
 781 };
 782
 783 #ifdef IFNAMSIZ
 784 #define CTDB_IFACE_SIZE IFNAMSIZ
 785 #else
 786 #define CTDB_IFACE_SIZE 16
 787 #endif
 788
 789 struct ctdb_iface {
 790         char name[CTDB_IFACE_SIZE+2];
 791         uint16_t link_state;
 792         uint32_t references;
 793 };
 794
 795 struct ctdb_iface_list {
 796         uint32_t num;
 797         struct ctdb_iface *iface;
 798 };
 799
 800 struct ctdb_public_ip_info {
 801         struct ctdb_public_ip ip;
 802         uint32_t active_idx;
 803         struct ctdb_iface_list *ifaces;
 804 };
 805
 806 struct ctdb_statistics_list {
 807         int num;
 808         struct ctdb_statistics *stats;
 809 };
 810
 811 struct ctdb_key_data {
 812         uint32_t db_id;
 813         struct ctdb_ltdb_header header;
 814         TDB_DATA key;
 815 };
 816
 817 struct ctdb_db_statistics {
 818         struct {
 819                 uint32_t num_calls;
 820                 uint32_t num_current;
 821                 uint32_t num_pending;
 822                 uint32_t num_failed;
 823                 struct ctdb_latency_counter latency;
 824                 uint32_t buckets[MAX_COUNT_BUCKETS];
 825         } locks;
 826         struct {
 827                 struct ctdb_latency_counter latency;
 828         } vacuum;
 829         uint32_t db_ro_delegations;
 830         uint32_t db_ro_revokes;
 831         uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
 832         uint32_t num_hot_keys;
 833         struct {
 834                 uint32_t count;
 835                 TDB_DATA key;
 836         } hot_keys[MAX_HOT_KEYS];
 837 };
 838
 839 enum ctdb_runstate {
 840         CTDB_RUNSTATE_UNKNOWN,
 841         CTDB_RUNSTATE_INIT,
 842         CTDB_RUNSTATE_SETUP,
 843         CTDB_RUNSTATE_FIRST_RECOVERY,
 844         CTDB_RUNSTATE_STARTUP,
 845         CTDB_RUNSTATE_RUNNING,
 846         CTDB_RUNSTATE_SHUTDOWN,
 847 };
 848
 849 struct ctdb_pid_srvid {
 850         pid_t pid;
 851         uint64_t srvid;
 852 };
 853
 854 struct ctdb_req_control_data {
 855         uint32_t opcode;
 856         union {
 857                 pid_t pid;
 858                 uint32_t db_id;
 859                 struct ctdb_vnn_map *vnnmap;
 860                 uint32_t loglevel;
 861                 struct ctdb_pulldb *pulldb;
 862                 struct ctdb_pulldb_ext *pulldb_ext;
 863                 struct ctdb_rec_buffer *recbuf;
 864                 uint32_t recmode;
 865                 const char *db_name;
 866                 struct ctdb_traverse_start *traverse_start;
 867                 struct ctdb_traverse_all *traverse_all;
 868                 struct ctdb_rec_data *rec_data;
 869                 uint32_t recmaster;
 870                 struct ctdb_connection *conn;
 871                 struct ctdb_tunable *tunable;
 872                 const char *tun_var;
 873                 struct ctdb_node_flag_change *flag_change;
 874                 ctdb_sock_addr *addr;
 875                 struct ctdb_tickle_list *tickles;
 876                 struct ctdb_client_id *cid;
 877                 struct ctdb_addr_info *addr_info;
 878                 struct ctdb_transdb *transdb;
 879                 struct ctdb_public_ip *pubip;
 880                 enum ctdb_event event;
 881                 double reclock_latency;
 882                 uint32_t role;
 883                 struct ctdb_ban_state *ban_state;
 884                 struct ctdb_notify_data *notify;
 885                 uint64_t srvid;
 886                 struct ctdb_iface *iface;
 887                 struct ctdb_key_data *key;
 888                 struct ctdb_traverse_start_ext *traverse_start_ext;
 889                 struct ctdb_traverse_all_ext *traverse_all_ext;
 890                 struct ctdb_pid_srvid *pid_srvid;
 891         } data;
 892 };
 893
 894 struct ctdb_reply_control_data {
 895         uint32_t opcode;
 896         union {
 897                 struct ctdb_statistics *stats;
 898                 const char *db_path;
 899                 struct ctdb_vnn_map *vnnmap;
 900                 uint32_t loglevel;
 901                 struct ctdb_dbid_map *dbmap;
 902                 struct ctdb_rec_buffer *recbuf;
 903                 uint32_t db_id;
 904                 const char *db_name;
 905                 const char *mem_str;
 906                 uint32_t tun_value;
 907                 struct ctdb_var_list *tun_var_list;
 908                 struct ctdb_tunable_list *tun_list;
 909                 struct ctdb_tickle_list *tickles;
 910                 struct ctdb_client_id_map *cid_map;
 911                 struct ctdb_uptime *uptime;
 912                 uint32_t caps;
 913                 struct ctdb_public_ip_list *pubip_list;
 914                 struct ctdb_node_map *nodemap;
 915                 const char *reclock_file;
 916                 struct ctdb_ban_state *ban_state;
 917                 uint64_t seqnum;
 918                 const char *reason;
 919                 struct ctdb_public_ip_info *ipinfo;
 920                 struct ctdb_iface_list *iface_list;
 921                 struct ctdb_statistics_list *stats_list;
 922                 struct ctdb_db_statistics *dbstats;
 923                 enum ctdb_runstate runstate;
 924                 uint32_t num_records;
 925                 int tdb_flags;
 926         } data;
 927 };
 928
 929 struct ctdb_req_control {
 930         uint32_t opcode;
 931         uint32_t pad;
 932         uint64_t srvid;
 933         uint32_t client_id;
 934 #define CTDB_CTRL_FLAG_NOREPLY   1
 935 #define CTDB_CTRL_FLAG_OPCODE_SPECIFIC   0xFFFF0000
 936 /* Ugly overloading of this field... */
 937 #define CTDB_PUBLIC_IP_FLAGS_ONLY_AVAILABLE 0x00010000
 938         uint32_t flags;
 939         struct ctdb_req_control_data rdata;
 940 };
 941
 942 struct ctdb_reply_control {
 943         int32_t status;
 944         const char *errmsg;
 945         struct ctdb_reply_control_data rdata;
 946 };
 947
 948 struct ctdb_election_message {
 949         uint32_t num_connected;
 950         struct timeval priority_time;
 951         uint32_t pnn;
 952         uint32_t node_flags;
 953 };
 954
 955 struct ctdb_srvid_message {
 956         uint32_t pnn;
 957         uint64_t srvid;
 958 };
 959
 960 struct ctdb_disable_message {
 961         uint32_t pnn;
 962         uint64_t srvid;
 963         uint32_t timeout;
 964 };
 965
 966 union ctdb_message_data {
 967         /* SRVID_ELECTION */
 968         struct ctdb_election_message *election;
 969         /* SRVID_RELEASE_IP, SRVID_TAKE_IP */
 970         const char *ipaddr;
 971         /* SRVID_SET_NODE_FLAGS, SERVID_PUSH_NODE_FLAGS */
 972         struct ctdb_node_flag_change *flag_change;
 973         /* SRVID_RECD_UPDATE_IP */
 974         struct ctdb_public_ip *pubip;
 975         /* SRVID_VACUUM_FETCH */
 976         struct ctdb_rec_buffer *recbuf;
 977         /* SRVID_DETACH_DATABASE */
 978         uint32_t db_id;
 979         /* SRVID_MEM_DUMP, SRVID_TAKEOVER_RUN */
 980         struct ctdb_srvid_message *msg;
 981         /* SRVID_BANNING, SRVID_REBALANCE_NODE */
 982         uint32_t pnn;
 983         /* SRVID_DISABLE_TAKEOVER_RUNS, SRVID_DISABLE_RECOVERIES */
 984         struct ctdb_disable_message *disable;
 985         /* SRVID_DISABLE_IP_CHECK */
 986         uint32_t timeout;
 987         /* Other */
 988         TDB_DATA data;
 989 };
 990
 991 struct ctdb_req_message {
 992         uint64_t srvid;
 993         union ctdb_message_data data;
 994 };
 995
 996 struct ctdb_req_message_data {
 997         uint64_t srvid;
 998         TDB_DATA data;
 999 };
1000
1001 struct ctdb_req_keepalive {
1002         uint32_t version;
1003         uint32_t uptime;
1004 };
1005
1006 #define CTDB_TUNNEL_TEST        0xffffffff00000000
1007
1008 #define CTDB_TUNNEL_FLAG_REQUEST        0x00000001
1009 #define CTDB_TUNNEL_FLAG_REPLY          0x00000002
1010 #define CTDB_TUNNEL_FLAG_NOREPLY        0x00000010
1011
1012 struct ctdb_req_tunnel {
1013         uint64_t tunnel_id;
1014         uint32_t flags;
1015         TDB_DATA data;
1016 };
1017
1018
1019 /* This is equivalent to server_id */
1020 struct ctdb_server_id {
1021         uint64_t pid;
1022         uint32_t task_id;
1023         uint32_t vnn;
1024         uint64_t unique_id;
1025 };
1026
1027 enum ctdb_g_lock_type {
1028         CTDB_G_LOCK_READ = 0,
1029         CTDB_G_LOCK_WRITE = 1,
1030 };
1031
1032 struct ctdb_g_lock {
1033         enum ctdb_g_lock_type type;
1034         struct ctdb_server_id sid;
1035 };
1036
1037 struct ctdb_g_lock_list {
1038         unsigned int num;
1039         struct ctdb_g_lock *lock;
1040 };
1041
1042 /*
1043  * Generic packet header
1044  */
1045
1046 struct sock_packet_header {
1047         uint32_t length;
1048         uint32_t reqid;
1049 };
1050
1051 /*
1052  * Eventd protocol
1053  */
1054
1055 enum ctdb_event_command {
1056         CTDB_EVENT_COMMAND_RUN            = 1,
1057         CTDB_EVENT_COMMAND_STATUS         = 2,
1058         CTDB_EVENT_COMMAND_SCRIPT_LIST    = 3,
1059         CTDB_EVENT_COMMAND_SCRIPT_ENABLE  = 4,
1060         CTDB_EVENT_COMMAND_SCRIPT_DISABLE = 5,
1061 };
1062
1063 enum ctdb_event_status_state {
1064         CTDB_EVENT_LAST_RUN     = 1,
1065         CTDB_EVENT_LAST_PASS    = 2,
1066         CTDB_EVENT_LAST_FAIL    = 3,
1067 };
1068
1069 struct ctdb_event_request_run {
1070         enum ctdb_event event;
1071         uint32_t timeout;
1072         const char *arg_str;
1073 };
1074
1075 struct ctdb_event_request_status {
1076         enum ctdb_event event;
1077         enum ctdb_event_status_state state;
1078 };
1079
1080 struct ctdb_event_request_script_enable {
1081         const char *script_name;
1082 };
1083
1084 struct ctdb_event_request_script_disable {
1085         const char *script_name;
1086 };
1087
1088 struct ctdb_event_request_data {
1089         enum ctdb_event_command command;
1090         union {
1091                 struct ctdb_event_request_run *run;
1092                 struct ctdb_event_request_status *status;
1093                 struct ctdb_event_request_script_enable *script_enable;
1094                 struct ctdb_event_request_script_disable *script_disable;
1095         } data;
1096 };
1097
1098 struct ctdb_event_reply_status {
1099         int status;
1100         struct ctdb_script_list *script_list;
1101 };
1102
1103 struct ctdb_event_reply_script_list {
1104         struct ctdb_script_list *script_list;
1105 };
1106
1107 struct ctdb_event_reply_data {
1108         enum ctdb_event_command command;
1109         int32_t result;
1110         union {
1111                 struct ctdb_event_reply_status *status;
1112                 struct ctdb_event_reply_script_list *script_list;
1113         } data;
1114 };
1115
1116 struct ctdb_event_request {
1117         struct sock_packet_header header;
1118         struct ctdb_event_request_data rdata;
1119 };
1120
1121 struct ctdb_event_reply {
1122         struct sock_packet_header header;
1123         struct ctdb_event_reply_data rdata;
1124 };
1125
1126 #endif /* __CTDB_PROTOCOL_H__ */