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