ctdb/include/ctdb_private.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_PRIVATE_H
  21 #define _CTDB_PRIVATE_H
  22
  23 #include "ctdb_client.h"
  24 #include <sys/socket.h>
  25
  26 #include "common/db_hash.h"
  27
  28 /*
  29   array of tcp connections
  30  */
  31 struct ctdb_tcp_array {
  32         uint32_t num;
  33         struct ctdb_connection *connections;
  34 };
  35
  36 /*
  37   an installed ctdb remote call
  38 */
  39 struct ctdb_registered_call {
  40         struct ctdb_registered_call *next, *prev;
  41         uint32_t id;
  42         ctdb_fn_t fn;
  43 };
  44
  45 /*
  46   check that a pnn is valid
  47  */
  48 #define ctdb_validate_pnn(ctdb, pnn) (((uint32_t)(pnn)) < (ctdb)->num_nodes)
  49
  50 /* used for callbacks in ctdb_control requests */
  51 typedef void (*ctdb_control_callback_fn_t)(struct ctdb_context *,
  52                                            int32_t status, TDB_DATA data,
  53                                            const char *errormsg,
  54                                            void *private_data);
  55 /*
  56   structure describing a connected client in the daemon
  57  */
  58 struct ctdb_client {
  59         struct ctdb_context *ctdb;
  60         int fd;
  61         struct ctdb_queue *queue;
  62         uint32_t client_id;
  63         pid_t pid;
  64         struct ctdb_tcp_list *tcp_list;
  65         uint32_t db_id;
  66         uint32_t num_persistent_updates;
  67         struct ctdb_client_notify_list *notify;
  68 };
  69
  70 /*
  71   state associated with one node
  72 */
  73 struct ctdb_node {
  74         struct ctdb_context *ctdb;
  75         ctdb_sock_addr address;
  76         const char *name; /* for debug messages */
  77         void *private_data; /* private to transport */
  78         uint32_t pnn;
  79         uint32_t flags;
  80
  81         /* used by the dead node monitoring */
  82         uint32_t dead_count;
  83         uint32_t rx_cnt;
  84         uint32_t tx_cnt;
  85
  86         /* a list of controls pending to this node, so we can time them out quickly
  87            if the node becomes disconnected */
  88         struct daemon_control_state *pending_controls;
  89
  90         /* used by the recovery dameon to track when a node should be banned */
  91         struct ctdb_banning_state *ban_state;
  92 };
  93
  94 /*
  95   transport specific methods
  96 */
  97 struct ctdb_methods {
  98         int (*initialise)(struct ctdb_context *); /* initialise transport structures */
  99         int (*start)(struct ctdb_context *); /* start the transport */
 100         int (*add_node)(struct ctdb_node *); /* setup a new node */
 101         int (*connect_node)(struct ctdb_node *); /* connect to node */
 102         int (*queue_pkt)(struct ctdb_node *, uint8_t *data, uint32_t length);
 103         void *(*allocate_pkt)(TALLOC_CTX *mem_ctx, size_t );
 104         void (*shutdown)(struct ctdb_context *); /* shutdown transport */
 105         void (*restart)(struct ctdb_node *); /* stop and restart the connection */
 106 };
 107
 108 /*
 109   transport calls up to the ctdb layer
 110 */
 111 struct ctdb_upcalls {
 112         /* recv_pkt is called when a packet comes in */
 113         void (*recv_pkt)(struct ctdb_context *, uint8_t *data, uint32_t length);
 114
 115         /* node_dead is called when an attempt to send to a node fails */
 116         void (*node_dead)(struct ctdb_node *);
 117
 118         /* node_connected is called when a connection to a node is established */
 119         void (*node_connected)(struct ctdb_node *);
 120 };
 121
 122 /* additional data required for the daemon mode */
 123 struct ctdb_daemon_data {
 124         int sd;
 125         char *name;
 126         struct ctdb_queue *queue;
 127 };
 128
 129
 130 #define CTDB_UPDATE_STAT(ctdb, counter, value) \
 131         {                                                                               \
 132                 if (value > ctdb->statistics.counter) {                                 \
 133                         ctdb->statistics.counter = value;                               \
 134                 }                                                                       \
 135                 if (value > ctdb->statistics_current.counter) {                         \
 136                         ctdb->statistics_current.counter = value;                       \
 137                 }                                                                       \
 138         }
 139
 140 #define CTDB_INCREMENT_STAT(ctdb, counter) \
 141         {                                                                               \
 142                 ctdb->statistics.counter++;                                             \
 143                 ctdb->statistics_current.counter++;                                     \
 144         }
 145
 146 #define CTDB_DECREMENT_STAT(ctdb, counter) \
 147         {                                                                               \
 148                 if (ctdb->statistics.counter > 0)                                       \
 149                         ctdb->statistics.counter--;                                     \
 150                 if (ctdb->statistics_current.counter > 0)                               \
 151                         ctdb->statistics_current.counter--;                             \
 152         }
 153
 154 #define CTDB_INCREMENT_DB_STAT(ctdb_db, counter) \
 155         {                                                                               \
 156                 ctdb_db->statistics.counter++;                                          \
 157         }
 158
 159 #define CTDB_DECREMENT_DB_STAT(ctdb_db, counter) \
 160         {                                                                               \
 161                 if (ctdb_db->statistics.counter > 0)                                    \
 162                         ctdb_db->statistics.counter--;                                  \
 163         }
 164
 165 #define CTDB_UPDATE_RECLOCK_LATENCY(ctdb, name, counter, value) \
 166         {                                                                               \
 167                 if (value > ctdb->statistics.counter.max)                               \
 168                         ctdb->statistics.counter.max = value;                           \
 169                 if (value > ctdb->statistics_current.counter.max)                       \
 170                         ctdb->statistics_current.counter.max = value;                   \
 171                                                                                         \
 172                 if (ctdb->statistics.counter.num == 0 ||                                \
 173                     value < ctdb->statistics.counter.min)                               \
 174                         ctdb->statistics.counter.min = value;                           \
 175                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 176                     value < ctdb->statistics_current.counter.min)                       \
 177                         ctdb->statistics_current.counter.min = value;                   \
 178                                                                                         \
 179                 ctdb->statistics.counter.total += value;                                \
 180                 ctdb->statistics_current.counter.total += value;                        \
 181                                                                                         \
 182                 ctdb->statistics.counter.num++;                                         \
 183                 ctdb->statistics_current.counter.num++;                                 \
 184                                                                                         \
 185                 if (ctdb->tunable.reclock_latency_ms != 0) {                            \
 186                         if (value*1000 > ctdb->tunable.reclock_latency_ms) {            \
 187                                 DEBUG(DEBUG_ERR,                                        \
 188                                       ("High RECLOCK latency %fs for operation %s\n",   \
 189                                        value, name));                                   \
 190                         }                                                               \
 191                 }                                                                       \
 192         }
 193
 194 #define CTDB_UPDATE_DB_LATENCY(ctdb_db, operation, counter, value)                      \
 195         {                                                                               \
 196                 if (value > ctdb_db->statistics.counter.max)                            \
 197                         ctdb_db->statistics.counter.max = value;                        \
 198                 if (ctdb_db->statistics.counter.num == 0 ||                             \
 199                     value < ctdb_db->statistics.counter.min)                            \
 200                         ctdb_db->statistics.counter.min = value;                        \
 201                                                                                         \
 202                 ctdb_db->statistics.counter.total += value;                             \
 203                 ctdb_db->statistics.counter.num++;                                      \
 204                                                                                         \
 205                 if (ctdb_db->ctdb->tunable.log_latency_ms != 0) {                       \
 206                         if (value*1000 > ctdb_db->ctdb->tunable.log_latency_ms) {       \
 207                                 DEBUG(DEBUG_ERR,                                        \
 208                                       ("High latency %.6fs for operation %s on database %s\n",\
 209                                        value, operation, ctdb_db->db_name));            \
 210                         }                                                               \
 211                 }                                                                       \
 212         }
 213
 214 #define CTDB_UPDATE_LATENCY(ctdb, db, operation, counter, t) \
 215         {                                                                               \
 216                 double l = timeval_elapsed(&t);                                         \
 217                                                                                         \
 218                 if (l > ctdb->statistics.counter.max)                                   \
 219                         ctdb->statistics.counter.max = l;                               \
 220                 if (l > ctdb->statistics_current.counter.max)                           \
 221                         ctdb->statistics_current.counter.max = l;                       \
 222                                                                                         \
 223                 if (ctdb->statistics.counter.num == 0 ||                                \
 224                     l < ctdb->statistics.counter.min)                                   \
 225                         ctdb->statistics.counter.min = l;                               \
 226                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 227                     l < ctdb->statistics_current.counter.min)                           \
 228                         ctdb->statistics_current.counter.min = l;                       \
 229                                                                                         \
 230                 ctdb->statistics.counter.total += l;                                    \
 231                 ctdb->statistics_current.counter.total += l;                            \
 232                                                                                         \
 233                 ctdb->statistics.counter.num++;                                         \
 234                 ctdb->statistics_current.counter.num++;                                 \
 235                                                                                         \
 236                 if (ctdb->tunable.log_latency_ms != 0) {                                \
 237                         if (l*1000 > ctdb->tunable.log_latency_ms) {                    \
 238                                 DEBUG(DEBUG_WARNING,                                    \
 239                                       ("High latency %.6fs for operation %s on database %s\n",\
 240                                        l, operation, db->db_name));                     \
 241                         }                                                               \
 242                 }                                                                       \
 243         }
 244
 245
 246 struct ctdb_cluster_mutex_handle;
 247 struct eventd_context;
 248
 249 enum ctdb_freeze_mode {CTDB_FREEZE_NONE, CTDB_FREEZE_PENDING, CTDB_FREEZE_FROZEN};
 250
 251 /* main state of the ctdb daemon */
 252 struct ctdb_context {
 253         struct tevent_context *ev;
 254         struct timeval ctdbd_start_time;
 255         struct timeval last_recovery_started;
 256         struct timeval last_recovery_finished;
 257         uint32_t recovery_mode;
 258         TALLOC_CTX *tickle_update_context;
 259         TALLOC_CTX *keepalive_ctx;
 260         TALLOC_CTX *check_public_ifaces_ctx;
 261         struct ctdb_tunable_list tunable;
 262         enum ctdb_freeze_mode freeze_mode;
 263         struct ctdb_freeze_handle *freeze_handle;
 264         bool freeze_transaction_started;
 265         uint32_t freeze_transaction_id;
 266         ctdb_sock_addr *address;
 267         const char *name;
 268         const char *db_directory;
 269         const char *db_directory_persistent;
 270         const char *db_directory_state;
 271         struct tdb_wrap *db_persistent_health;
 272         uint32_t db_persistent_startup_generation;
 273         uint64_t db_persistent_check_errors;
 274         uint64_t max_persistent_check_errors;
 275         const char *transport;
 276         const char *recovery_lock;
 277         uint32_t pnn; /* our own pnn */
 278         uint32_t num_nodes;
 279         uint32_t num_connected;
 280         unsigned flags;
 281         uint32_t capabilities;
 282         struct reqid_context *idr;
 283         struct ctdb_node **nodes; /* array of nodes in the cluster - indexed by vnn */
 284         struct ctdb_vnn *vnn; /* list of public ip addresses and interfaces */
 285         struct ctdb_interface *ifaces; /* list of local interfaces */
 286         char *err_msg;
 287         const struct ctdb_methods *methods; /* transport methods */
 288         const struct ctdb_upcalls *upcalls; /* transport upcalls */
 289         void *private_data; /* private to transport */
 290         struct ctdb_db_context *db_list;
 291         struct srvid_context *srv;
 292         struct srvid_context *tunnels;
 293         struct ctdb_daemon_data daemon;
 294         struct ctdb_statistics statistics;
 295         struct ctdb_statistics statistics_current;
 296 #define MAX_STAT_HISTORY 100
 297         struct ctdb_statistics statistics_history[MAX_STAT_HISTORY];
 298         struct ctdb_vnn_map *vnn_map;
 299         uint32_t num_clients;
 300         uint32_t recovery_master;
 301         struct ctdb_client_ip *client_ip_list;
 302         bool do_checkpublicip;
 303         bool do_setsched;
 304         const char *event_script_dir;
 305         const char *notification_script;
 306         pid_t ctdbd_pid;
 307         pid_t recoverd_pid;
 308         enum ctdb_runstate runstate;
 309         struct ctdb_monitor_state *monitor;
 310         int start_as_disabled;
 311         int start_as_stopped;
 312         bool valgrinding;
 313         uint32_t *recd_ping_count;
 314         TALLOC_CTX *recd_ctx; /* a context used to track recoverd monitoring events */
 315         TALLOC_CTX *release_ips_ctx; /* a context used to automatically drop all IPs if we fail to recover the node */
 316
 317         struct eventd_context *ectx;
 318
 319         TALLOC_CTX *banning_ctx;
 320
 321         struct ctdb_vacuum_child_context *vacuumers;
 322
 323         /* mapping from pid to ctdb_client * */
 324         struct ctdb_client_pid_list *client_pids;
 325
 326         /* Used to defer db attach requests while in recovery mode */
 327         struct ctdb_deferred_attach_context *deferred_attach;
 328
 329         /* if we are a child process, do we have a domain socket to send controls on */
 330         bool can_send_controls;
 331
 332         struct ctdb_reloadips_handle *reload_ips;
 333
 334         const char *nodes_file;
 335         const char *public_addresses_file;
 336         struct trbt_tree *child_processes;
 337
 338         /* Used for locking record/db/alldb */
 339         struct lock_context *lock_current;
 340         struct lock_context *lock_pending;
 341 };
 342
 343 struct ctdb_db_context {
 344         struct ctdb_db_context *next, *prev;
 345         struct ctdb_context *ctdb;
 346         uint32_t db_id;
 347         uint8_t db_flags;
 348         const char *db_name;
 349         const char *db_path;
 350         struct tdb_wrap *ltdb;
 351         struct tdb_context *rottdb; /* ReadOnly tracking TDB */
 352         struct ctdb_registered_call *calls; /* list of registered calls */
 353         uint32_t seqnum;
 354         struct tevent_timer *seqnum_update;
 355         struct ctdb_traverse_local_handle *traverse;
 356         struct ctdb_vacuum_handle *vacuum_handle;
 357         char *unhealthy_reason;
 358         int pending_requests;
 359         struct revokechild_handle *revokechild_active;
 360         struct ctdb_persistent_state *persistent_state;
 361         struct trbt_tree *delete_queue;
 362         struct trbt_tree *sticky_records;
 363         int (*ctdb_ltdb_store_fn)(struct ctdb_db_context *ctdb_db,
 364                                   TDB_DATA key,
 365                                   struct ctdb_ltdb_header *header,
 366                                   TDB_DATA data);
 367
 368         /* used to track which records we are currently fetching
 369            so we can avoid sending duplicate fetch requests
 370         */
 371         struct trbt_tree *deferred_fetch;
 372         struct trbt_tree *defer_dmaster;
 373
 374         struct ctdb_db_statistics_old statistics;
 375
 376         struct lock_context *lock_current;
 377         struct lock_context *lock_pending;
 378         int lock_num_current;
 379         struct db_hash_context *lock_log;
 380
 381         struct ctdb_call_state *pending_calls;
 382
 383         enum ctdb_freeze_mode freeze_mode;
 384         struct ctdb_db_freeze_handle *freeze_handle;
 385         bool freeze_transaction_started;
 386         uint32_t freeze_transaction_id;
 387         uint32_t generation;
 388
 389         bool push_started;
 390         void *push_state;
 391
 392         struct hash_count_context *migratedb;
 393 };
 394
 395
 396 #define CTDB_NO_MEMORY(ctdb, p) do { if (!(p)) { \
 397           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 398           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 399           return -1; }} while (0)
 400
 401 #define CTDB_NO_MEMORY_VOID(ctdb, p) do { if (!(p)) { \
 402           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 403           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 404           return; }} while (0)
 405
 406 #define CTDB_NO_MEMORY_NULL(ctdb, p) do { if (!(p)) { \
 407           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 408           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 409           return NULL; }} while (0)
 410
 411 #define CTDB_NO_MEMORY_FATAL(ctdb, p) do { if (!(p)) { \
 412           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 413           ctdb_fatal(ctdb, "Out of memory in " __location__ ); \
 414           }} while (0)
 415
 416
 417 enum call_state {CTDB_CALL_WAIT, CTDB_CALL_DONE, CTDB_CALL_ERROR};
 418
 419 /*
 420   state of a in-progress ctdb call
 421 */
 422 struct ctdb_call_state {
 423         struct ctdb_call_state *next, *prev;
 424         enum call_state state;
 425         uint32_t reqid;
 426         struct ctdb_req_call_old *c;
 427         struct ctdb_db_context *ctdb_db;
 428         const char *errmsg;
 429         struct ctdb_call *call;
 430         uint32_t generation;
 431         struct {
 432                 void (*fn)(struct ctdb_call_state *);
 433                 void *private_data;
 434         } async;
 435 };
 436
 437 /* internal prototypes */
 438
 439 #define CHECK_CONTROL_DATA_SIZE(size) do { \
 440  if (indata.dsize != size) { \
 441          DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected %u\n", \
 442                   opcode, (unsigned)indata.dsize, (unsigned)size));     \
 443          return -1; \
 444  } \
 445  } while (0)
 446
 447 #define CHECK_CONTROL_MIN_DATA_SIZE(size) do { \
 448  if (indata.dsize < size) { \
 449          DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected >= %u\n", \
 450                   opcode, (unsigned)indata.dsize, (unsigned)size));     \
 451          return -1; \
 452  } \
 453  } while (0)
 454
 455 /*
 456   state of a in-progress ctdb call in client
 457 */
 458 struct ctdb_client_call_state {
 459         enum call_state state;
 460         uint32_t reqid;
 461         struct ctdb_db_context *ctdb_db;
 462         struct ctdb_call *call;
 463         struct {
 464                 void (*fn)(struct ctdb_client_call_state *);
 465                 void *private_data;
 466         } async;
 467 };
 468
 469 extern int script_log_level;
 470 extern bool fast_start;
 471 extern const char *ctdbd_pidfile;
 472
 473 typedef void (*deferred_requeue_fn)(void *call_context, struct ctdb_req_header *hdr);
 474
 475
 476 /* from tcp/ and ib/ */
 477
 478 int ctdb_tcp_init(struct ctdb_context *ctdb);
 479 int ctdb_ibw_init(struct ctdb_context *ctdb);
 480
 481 /* from ctdb_banning.c */
 482
 483 void ctdb_local_node_got_banned(struct ctdb_context *ctdb);
 484 int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata);
 485 int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata);
 486 void ctdb_ban_self(struct ctdb_context *ctdb);
 487
 488 /* from ctdb_call.c */
 489
 490 struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id);
 491
 492 void ctdb_request_dmaster(struct ctdb_context *ctdb,
 493                           struct ctdb_req_header *hdr);
 494 void ctdb_reply_dmaster(struct ctdb_context *ctdb,
 495                         struct ctdb_req_header *hdr);
 496 void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 497 void ctdb_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 498 void ctdb_reply_error(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 499
 500 void ctdb_call_resend_db(struct ctdb_db_context *ctdb);
 501 void ctdb_call_resend_all(struct ctdb_context *ctdb);
 502
 503 struct ctdb_call_state *ctdb_call_local_send(struct ctdb_db_context *ctdb_db,
 504                                              struct ctdb_call *call,
 505                                              struct ctdb_ltdb_header *header,
 506                                              TDB_DATA *data);
 507
 508 struct ctdb_call_state *ctdb_daemon_call_send_remote(
 509                                         struct ctdb_db_context *ctdb_db,
 510                                         struct ctdb_call *call,
 511                                         struct ctdb_ltdb_header *header);
 512 int ctdb_daemon_call_recv(struct ctdb_call_state *state,
 513                           struct ctdb_call *call);
 514
 515 int ctdb_start_revoke_ro_record(struct ctdb_context *ctdb,
 516                                 struct ctdb_db_context *ctdb_db,
 517                                 TDB_DATA key, struct ctdb_ltdb_header *header,
 518                                 TDB_DATA data);
 519
 520 int ctdb_add_revoke_deferred_call(struct ctdb_context *ctdb,
 521                                   struct ctdb_db_context *ctdb_db,
 522                                   TDB_DATA key, struct ctdb_req_header *hdr,
 523                                   deferred_requeue_fn fn, void *call_context);
 524
 525 int ctdb_migration_init(struct ctdb_db_context *ctdb_db);
 526
 527 /* from server/ctdb_control.c */
 528
 529 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata);
 530
 531 void ctdb_request_control_reply(struct ctdb_context *ctdb,
 532                                 struct ctdb_req_control_old *c,
 533                                 TDB_DATA *outdata, int32_t status,
 534                                 const char *errormsg);
 535
 536 void ctdb_request_control(struct ctdb_context *ctdb,
 537                           struct ctdb_req_header *hdr);
 538 void ctdb_reply_control(struct ctdb_context *ctdb,
 539                         struct ctdb_req_header *hdr);
 540
 541 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 542                              uint64_t srvid, uint32_t opcode,
 543                              uint32_t client_id, uint32_t flags,
 544                              TDB_DATA data,
 545                              ctdb_control_callback_fn_t callback,
 546                              void *private_data);
 547
 548 /* from server/ctdb_daemon.c */
 549
 550 int daemon_register_message_handler(struct ctdb_context *ctdb,
 551                                     uint32_t client_id, uint64_t srvid);
 552 int daemon_deregister_message_handler(struct ctdb_context *ctdb,
 553                                       uint32_t client_id, uint64_t srvid);
 554
 555 void daemon_tunnel_handler(uint64_t tunnel_id, TDB_DATA data,
 556                            void *private_data);
 557
 558 int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork);
 559
 560 struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb,
 561                                                  TALLOC_CTX *mem_ctx,
 562                                                  enum ctdb_operation operation,
 563                                                  size_t length, size_t slength,
 564                                                  const char *type);
 565
 566 #define ctdb_transport_allocate(ctdb, mem_ctx, operation, length, type) \
 567         (type *)_ctdb_transport_allocate(ctdb, mem_ctx, operation, length, \
 568                                          sizeof(type), #type)
 569
 570 void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb,
 571                                  struct ctdb_node *node);
 572
 573 int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id,
 574                          ctdb_fn_t fn, int id);
 575
 576 int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t pnn,
 577                              uint64_t srvid, TDB_DATA data);
 578
 579 int32_t ctdb_control_register_notify(struct ctdb_context *ctdb,
 580                                      uint32_t client_id, TDB_DATA indata);
 581 int32_t ctdb_control_deregister_notify(struct ctdb_context *ctdb,
 582                                        uint32_t client_id, TDB_DATA indata);
 583
 584 struct ctdb_client *ctdb_find_client_by_pid(struct ctdb_context *ctdb,
 585                                             pid_t pid);
 586
 587 int32_t ctdb_control_process_exists(struct ctdb_context *ctdb, pid_t pid);
 588 int32_t ctdb_control_check_pid_srvid(struct ctdb_context *ctdb,
 589                                      TDB_DATA indata);
 590
 591 int ctdb_control_getnodesfile(struct ctdb_context *ctdb, uint32_t opcode,
 592                               TDB_DATA indata, TDB_DATA *outdata);
 593
 594 void ctdb_shutdown_sequence(struct ctdb_context *ctdb, int exit_code);
 595
 596 int switch_from_server_to_client(struct ctdb_context *ctdb);
 597
 598 /* From server/ctdb_fork.c */
 599
 600 void ctdb_track_child(struct ctdb_context *ctdb, pid_t pid);
 601
 602 pid_t ctdb_fork(struct ctdb_context *ctdb);
 603 pid_t ctdb_vfork_exec(TALLOC_CTX *mem_ctx, struct ctdb_context *ctdb,
 604                       const char *helper, int helper_argc,
 605                       const char **helper_argv);
 606
 607 struct tevent_signal *ctdb_init_sigchld(struct ctdb_context *ctdb);
 608
 609 int ctdb_kill(struct ctdb_context *ctdb, pid_t pid, int signum);
 610
 611 /* from server/ctdb_freeze.c */
 612
 613 int32_t ctdb_control_db_freeze(struct ctdb_context *ctdb,
 614                                struct ctdb_req_control_old *c,
 615                                uint32_t db_id, bool *async_reply);
 616 int32_t ctdb_control_db_thaw(struct ctdb_context *ctdb, uint32_t db_id);
 617
 618 int32_t ctdb_control_freeze(struct ctdb_context *ctdb,
 619                             struct ctdb_req_control_old *c, bool *async_reply);
 620 int32_t ctdb_control_thaw(struct ctdb_context *ctdb, bool check_recmode);
 621
 622 bool ctdb_blocking_freeze(struct ctdb_context *ctdb);
 623
 624 int32_t ctdb_control_db_transaction_start(struct ctdb_context *ctdb,
 625                                           TDB_DATA indata);
 626 int32_t ctdb_control_db_transaction_cancel(struct ctdb_context *ctdb,
 627                                            TDB_DATA indata);
 628 int32_t ctdb_control_db_transaction_commit(struct ctdb_context *ctdb,
 629                                            TDB_DATA indata);
 630
 631 int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata);
 632
 633 bool ctdb_db_frozen(struct ctdb_db_context *ctdb_db);
 634 bool ctdb_db_all_frozen(struct ctdb_context *ctdb);
 635 bool ctdb_db_allow_access(struct ctdb_db_context *ctdb_db);
 636
 637 /* from server/ctdb_keepalive.c */
 638
 639 void ctdb_start_keepalive(struct ctdb_context *ctdb);
 640 void ctdb_stop_keepalive(struct ctdb_context *ctdb);
 641
 642 void ctdb_request_keepalive(struct ctdb_context *ctdb,
 643                             struct ctdb_req_header *hdr);
 644
 645 /* from server/ctdb_lock.c */
 646
 647 struct lock_request;
 648
 649 typedef int (*ctdb_db_handler_t)(struct ctdb_db_context *ctdb_db,
 650                                  void *private_data);
 651
 652 int ctdb_db_iterator(struct ctdb_context *ctdb, ctdb_db_handler_t handler,
 653                      void *private_data);
 654
 655 int ctdb_lockdb_mark(struct ctdb_db_context *ctdb_db);
 656
 657 int ctdb_lockdb_unmark(struct ctdb_db_context *ctdb_db);
 658
 659 struct lock_request *ctdb_lock_record(TALLOC_CTX *mem_ctx,
 660                                       struct ctdb_db_context *ctdb_db,
 661                                       TDB_DATA key,
 662                                       bool auto_mark,
 663                                       void (*callback)(void *, bool),
 664                                       void *private_data);
 665
 666 struct lock_request *ctdb_lock_db(TALLOC_CTX *mem_ctx,
 667                                   struct ctdb_db_context *ctdb_db,
 668                                   bool auto_mark,
 669                                   void (*callback)(void *, bool),
 670                                   void *private_data);
 671
 672 /* from ctdb_logging.c */
 673
 674 bool ctdb_logging_init(TALLOC_CTX *mem_ctx, const char *logging,
 675                        const char *debug_level);
 676
 677 struct ctdb_log_state *ctdb_vfork_with_logging(TALLOC_CTX *mem_ctx,
 678                                                struct ctdb_context *ctdb,
 679                                                const char *log_prefix,
 680                                                const char *helper,
 681                                                int helper_argc,
 682                                                const char **helper_argv,
 683                                                void (*logfn)(const char *,
 684                                                              uint16_t, void *),
 685                                                void *logfn_private, pid_t *pid);
 686
 687 int ctdb_set_child_logging(struct ctdb_context *ctdb);
 688
 689 /* from ctdb_logging_file.c */
 690
 691 void ctdb_log_init_file(void);
 692
 693 /* from ctdb_logging_syslog.c */
 694
 695 void ctdb_log_init_syslog(void);
 696
 697 /* from ctdb_ltdb_server.c */
 698
 699 int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db,
 700                            TDB_DATA key, struct ctdb_req_header *hdr,
 701                            void (*recv_pkt)(void *, struct ctdb_req_header *),
 702                            void *recv_context, bool ignore_generation);
 703
 704 int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db,
 705                                  TDB_DATA key, struct ctdb_ltdb_header *header,
 706                                  struct ctdb_req_header *hdr, TDB_DATA *data,
 707                                  void (*recv_pkt)(void *, struct ctdb_req_header *),
 708                                  void *recv_context, bool ignore_generation);
 709
 710 int ctdb_load_persistent_health(struct ctdb_context *ctdb,
 711                                 struct ctdb_db_context *ctdb_db);
 712 int ctdb_update_persistent_health(struct ctdb_context *ctdb,
 713                                   struct ctdb_db_context *ctdb_db,
 714                                   const char *reason,/* NULL means healthy */
 715                                   int num_healthy_nodes);
 716 int ctdb_recheck_persistent_health(struct ctdb_context *ctdb);
 717
 718 int32_t ctdb_control_db_set_healthy(struct ctdb_context *ctdb,
 719                                     TDB_DATA indata);
 720 int32_t ctdb_control_db_get_health(struct ctdb_context *ctdb,
 721                                    TDB_DATA indata, TDB_DATA *outdata);
 722
 723 int ctdb_set_db_readonly(struct ctdb_context *ctdb,
 724                          struct ctdb_db_context *ctdb_db);
 725
 726 int ctdb_process_deferred_attach(struct ctdb_context *ctdb);
 727
 728 int32_t ctdb_control_db_attach(struct ctdb_context *ctdb,
 729                                TDB_DATA indata,
 730                                TDB_DATA *outdata,
 731                                uint8_t db_flags,
 732                                uint32_t srcnode,
 733                                uint32_t client_id,
 734                                struct ctdb_req_control_old *c,
 735                                bool *async_reply);
 736 int32_t ctdb_control_db_detach(struct ctdb_context *ctdb, TDB_DATA indata,
 737                                uint32_t client_id);
 738
 739 int ctdb_attach_databases(struct ctdb_context *ctdb);
 740
 741 int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id,
 742                                 uint32_t srcnode);
 743 int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id);
 744
 745 int ctdb_set_db_sticky(struct ctdb_context *ctdb,
 746                        struct ctdb_db_context *ctdb_db);
 747
 748 void ctdb_db_statistics_reset(struct ctdb_db_context *ctdb_db);
 749
 750 int32_t ctdb_control_get_db_statistics(struct ctdb_context *ctdb,
 751                                        uint32_t db_id, TDB_DATA *outdata);
 752
 753 /* from ctdb_monitor.c */
 754
 755 void ctdb_run_notification_script(struct ctdb_context *ctdb, const char *event);
 756
 757 void ctdb_stop_monitoring(struct ctdb_context *ctdb);
 758
 759 void ctdb_wait_for_first_recovery(struct ctdb_context *ctdb);
 760
 761 int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata);
 762
 763 /* from ctdb_persistent.c */
 764
 765 void ctdb_persistent_finish_trans3_commits(struct ctdb_context *ctdb);
 766
 767 int32_t ctdb_control_trans3_commit(struct ctdb_context *ctdb,
 768                                    struct ctdb_req_control_old *c,
 769                                    TDB_DATA recdata, bool *async_reply);
 770
 771 int32_t ctdb_control_start_persistent_update(struct ctdb_context *ctdb,
 772                                              struct ctdb_req_control_old *c,
 773                                              TDB_DATA recdata);
 774 int32_t ctdb_control_cancel_persistent_update(struct ctdb_context *ctdb,
 775                                               struct ctdb_req_control_old *c,
 776                                               TDB_DATA recdata);
 777
 778 int32_t ctdb_control_get_db_seqnum(struct ctdb_context *ctdb,
 779                                    TDB_DATA indata, TDB_DATA *outdata);
 780
 781 /* from ctdb_recover.c */
 782
 783 int ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 784                            TDB_DATA indata, TDB_DATA *outdata);
 785 int ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 786                            TDB_DATA indata, TDB_DATA *outdata);
 787
 788 int ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode,
 789                           TDB_DATA indata, TDB_DATA *outdata);
 790 int ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode,
 791                             TDB_DATA indata, TDB_DATA *outdata);
 792
 793 int ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode);
 794
 795 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata,
 796                              TDB_DATA *outdata);
 797 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata);
 798
 799 int32_t ctdb_control_db_pull(struct ctdb_context *ctdb,
 800                              struct ctdb_req_control_old *c,
 801                              TDB_DATA indata, TDB_DATA *outdata);
 802 int32_t ctdb_control_db_push_start(struct ctdb_context *ctdb,
 803                                    TDB_DATA indata);
 804 int32_t ctdb_control_db_push_confirm(struct ctdb_context *ctdb,
 805                                      TDB_DATA indata, TDB_DATA *outdata);
 806
 807 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb);
 808
 809 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
 810                                  struct ctdb_req_control_old *c,
 811                                  TDB_DATA indata, bool *async_reply,
 812                                  const char **errormsg);
 813
 814 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
 815                                  struct ctdb_req_control_old *c,
 816                                  bool *async_reply);
 817 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
 818                                  struct ctdb_req_control_old *c,
 819                                  bool *async_reply);
 820
 821 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb,
 822                                         TDB_DATA indata, TDB_DATA *outdata);
 823 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
 824                                      TDB_DATA indata, TDB_DATA *outdata);
 825
 826 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb,
 827                                       TDB_DATA *outdata);
 828
 829 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb);
 830 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb,
 831                                    uint32_t opcode, TDB_DATA indata);
 832
 833 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb);
 834 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb);
 835
 836 /* from ctdb_recoverd.c */
 837
 838 int ctdb_start_recoverd(struct ctdb_context *ctdb);
 839 void ctdb_stop_recoverd(struct ctdb_context *ctdb);
 840
 841 /* from ctdb_server.c */
 842
 843 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
 844
 845 int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const ctdb_sock_addr *nodeip);
 846
 847 void ctdb_load_nodes_file(struct ctdb_context *ctdb);
 848
 849 int ctdb_set_address(struct ctdb_context *ctdb, const char *address);
 850
 851 uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb);
 852
 853 void ctdb_input_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *);
 854
 855 void ctdb_node_dead(struct ctdb_node *node);
 856 void ctdb_node_connected(struct ctdb_node *node);
 857
 858 void ctdb_queue_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 859 void ctdb_queue_packet_opcode(struct ctdb_context *ctdb,
 860                               struct ctdb_req_header *hdr, unsigned opcode);
 861
 862 /* from ctdb_serverids.c */
 863
 864 int32_t ctdb_control_register_server_id(struct ctdb_context *ctdb,
 865                                         uint32_t client_id, TDB_DATA indata);
 866 int32_t ctdb_control_check_server_id(struct ctdb_context *ctdb,
 867                                      TDB_DATA indata);
 868 int32_t ctdb_control_unregister_server_id(struct ctdb_context *ctdb,
 869                                           TDB_DATA indata);
 870 int32_t ctdb_control_get_server_id_list(struct ctdb_context *ctdb,
 871                                         TDB_DATA *outdata);
 872
 873 /* from ctdb_statistics.c */
 874
 875 int ctdb_statistics_init(struct ctdb_context *ctdb);
 876
 877 int32_t ctdb_control_get_stat_history(struct ctdb_context *ctdb,
 878                                       struct ctdb_req_control_old *c,
 879                                       TDB_DATA *outdata);
 880
 881 /* from ctdb_takeover.c */
 882
 883 int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
 884                                  struct ctdb_req_control_old *c,
 885                                  TDB_DATA indata,
 886                                  bool *async_reply);
 887 int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
 888                                  struct ctdb_req_control_old *c,
 889                                  TDB_DATA indata,
 890                                  bool *async_reply);
 891 int32_t ctdb_control_ipreallocated(struct ctdb_context *ctdb,
 892                                  struct ctdb_req_control_old *c,
 893                                  bool *async_reply);
 894
 895 int ctdb_set_public_addresses(struct ctdb_context *ctdb, bool check_addresses);
 896
 897 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id,
 898                                 TDB_DATA indata);
 899 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata,
 900                              bool tcp_update_needed);
 901 int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata);
 902 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn);
 903
 904 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client);
 905
 906 void ctdb_release_all_ips(struct ctdb_context *ctdb);
 907
 908 int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb,
 909                                     struct ctdb_req_control_old *c,
 910                                     TDB_DATA *outdata);
 911 int32_t ctdb_control_get_public_ip_info(struct ctdb_context *ctdb,
 912                                         struct ctdb_req_control_old *c,
 913                                         TDB_DATA indata, TDB_DATA *outdata);
 914
 915 int32_t ctdb_control_get_ifaces(struct ctdb_context *ctdb,
 916                                 struct ctdb_req_control_old *c,
 917                                 TDB_DATA *outdata);
 918 int32_t ctdb_control_set_iface_link(struct ctdb_context *ctdb,
 919                                     struct ctdb_req_control_old *c,
 920                                     TDB_DATA indata);
 921
 922 int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb,
 923                                          TDB_DATA indata);
 924 int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb,
 925                                          TDB_DATA indata, TDB_DATA *outdata);
 926
 927 void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb);
 928
 929 int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb,
 930                                        TDB_DATA indata);
 931
 932 int32_t ctdb_control_add_public_address(struct ctdb_context *ctdb,
 933                                         TDB_DATA indata);
 934 int32_t ctdb_control_del_public_address(struct ctdb_context *ctdb,
 935                                         TDB_DATA recdata);
 936
 937 int32_t ctdb_control_reload_public_ips(struct ctdb_context *ctdb,
 938                                        struct ctdb_req_control_old *c,
 939                                        bool *async_reply);
 940
 941 /* from ctdb_traverse.c */
 942
 943 int32_t ctdb_control_traverse_all_ext(struct ctdb_context *ctdb,
 944                                       TDB_DATA data, TDB_DATA *outdata);
 945 int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb,
 946                                   TDB_DATA data, TDB_DATA *outdata);
 947 int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb,
 948                                    TDB_DATA data, TDB_DATA *outdata);
 949 int32_t ctdb_control_traverse_kill(struct ctdb_context *ctdb, TDB_DATA indata,
 950                                     TDB_DATA *outdata, uint32_t srcnode);
 951
 952 int32_t ctdb_control_traverse_start_ext(struct ctdb_context *ctdb,
 953                                         TDB_DATA indata, TDB_DATA *outdata,
 954                                         uint32_t srcnode, uint32_t client_id);
 955 int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb,
 956                                     TDB_DATA indata, TDB_DATA *outdata,
 957                                     uint32_t srcnode, uint32_t client_id);
 958
 959 /* from ctdb_tunables.c */
 960
 961 void ctdb_tunables_set_defaults(struct ctdb_context *ctdb);
 962
 963 int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
 964                                  TDB_DATA *outdata);
 965 int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata);
 966 int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb,
 967                                    TDB_DATA *outdata);
 968
 969 /* from ctdb_tunnel.c */
 970
 971 int32_t ctdb_control_tunnel_register(struct ctdb_context *ctdb,
 972                                      uint32_t client_id, uint64_t tunnel_id);
 973 int32_t ctdb_control_tunnel_deregister(struct ctdb_context *ctdb,
 974                                        uint32_t client_id, uint64_t tunnel_id);
 975
 976 int ctdb_daemon_send_tunnel(struct ctdb_context *ctdb, uint32_t destnode,
 977                             uint64_t tunnel_id, uint32_t client_id,
 978                             TDB_DATA data);
 979
 980 void ctdb_request_tunnel(struct ctdb_context *ctdb,
 981                          struct ctdb_req_header *hdr);
 982
 983 /* from ctdb_update_record.c */
 984
 985 int32_t ctdb_control_update_record(struct ctdb_context *ctdb,
 986                                    struct ctdb_req_control_old *c,
 987                                    TDB_DATA recdata, bool *async_reply);
 988
 989 /* from ctdb_uptime.c */
 990
 991 int32_t ctdb_control_uptime(struct ctdb_context *ctdb, TDB_DATA *outdata);
 992
 993 /* from ctdb_vacuum.c */
 994
 995 void ctdb_stop_vacuuming(struct ctdb_context *ctdb);
 996 int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db);
 997
 998 int32_t ctdb_control_schedule_for_deletion(struct ctdb_context *ctdb,
 999                                            TDB_DATA indata);
1000 int32_t ctdb_local_schedule_for_deletion(struct ctdb_db_context *ctdb_db,
1001                                          const struct ctdb_ltdb_header *hdr,
1002                                          TDB_DATA key);
1003
1004 void ctdb_local_remove_from_delete_queue(struct ctdb_db_context *ctdb_db,
1005                                          const struct ctdb_ltdb_header *hdr,
1006                                          const TDB_DATA key);
1007
1008 /* from eventscript.c */
1009
1010 int ctdb_start_eventd(struct ctdb_context *ctdb);
1011 void ctdb_stop_eventd(struct ctdb_context *ctdb);
1012
1013 int ctdb_event_script_callback(struct ctdb_context *ctdb,
1014                                TALLOC_CTX *mem_ctx,
1015                                void (*callback)(struct ctdb_context *,
1016                                                 int, void *),
1017                                void *private_data,
1018                                enum ctdb_event call,
1019                                const char *fmt, ...) PRINTF_ATTRIBUTE(6,7);
1020
1021 int ctdb_event_script_args(struct ctdb_context *ctdb,
1022                            enum ctdb_event call,
1023                            const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
1024
1025 int ctdb_event_script(struct ctdb_context *ctdb,
1026                       enum ctdb_event call);
1027
1028 #endif