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 ctdb_daemon_data daemon;
 293         struct ctdb_statistics statistics;
 294         struct ctdb_statistics statistics_current;
 295 #define MAX_STAT_HISTORY 100
 296         struct ctdb_statistics statistics_history[MAX_STAT_HISTORY];
 297         struct ctdb_vnn_map *vnn_map;
 298         uint32_t num_clients;
 299         uint32_t recovery_master;
 300         struct ctdb_client_ip *client_ip_list;
 301         bool do_checkpublicip;
 302         bool do_setsched;
 303         const char *event_script_dir;
 304         const char *notification_script;
 305         const char *default_public_interface;
 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 int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork);
 556
 557 struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb,
 558                                                  TALLOC_CTX *mem_ctx,
 559                                                  enum ctdb_operation operation,
 560                                                  size_t length, size_t slength,
 561                                                  const char *type);
 562
 563 #define ctdb_transport_allocate(ctdb, mem_ctx, operation, length, type) \
 564         (type *)_ctdb_transport_allocate(ctdb, mem_ctx, operation, length, \
 565                                          sizeof(type), #type)
 566
 567 void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb,
 568                                  struct ctdb_node *node);
 569
 570 int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id,
 571                          ctdb_fn_t fn, int id);
 572
 573 int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t pnn,
 574                              uint64_t srvid, TDB_DATA data);
 575
 576 int32_t ctdb_control_register_notify(struct ctdb_context *ctdb,
 577                                      uint32_t client_id, TDB_DATA indata);
 578 int32_t ctdb_control_deregister_notify(struct ctdb_context *ctdb,
 579                                        uint32_t client_id, TDB_DATA indata);
 580
 581 struct ctdb_client *ctdb_find_client_by_pid(struct ctdb_context *ctdb,
 582                                             pid_t pid);
 583
 584 int32_t ctdb_control_process_exists(struct ctdb_context *ctdb, pid_t pid);
 585 int32_t ctdb_control_check_pid_srvid(struct ctdb_context *ctdb,
 586                                      TDB_DATA indata);
 587
 588 int ctdb_control_getnodesfile(struct ctdb_context *ctdb, uint32_t opcode,
 589                               TDB_DATA indata, TDB_DATA *outdata);
 590
 591 void ctdb_shutdown_sequence(struct ctdb_context *ctdb, int exit_code);
 592
 593 int switch_from_server_to_client(struct ctdb_context *ctdb);
 594
 595 /* From server/ctdb_fork.c */
 596
 597 void ctdb_track_child(struct ctdb_context *ctdb, pid_t pid);
 598
 599 pid_t ctdb_fork(struct ctdb_context *ctdb);
 600 pid_t ctdb_vfork_exec(TALLOC_CTX *mem_ctx, struct ctdb_context *ctdb,
 601                       const char *helper, int helper_argc,
 602                       const char **helper_argv);
 603
 604 struct tevent_signal *ctdb_init_sigchld(struct ctdb_context *ctdb);
 605
 606 int ctdb_kill(struct ctdb_context *ctdb, pid_t pid, int signum);
 607
 608 /* from server/ctdb_freeze.c */
 609
 610 int32_t ctdb_control_db_freeze(struct ctdb_context *ctdb,
 611                                struct ctdb_req_control_old *c,
 612                                uint32_t db_id, bool *async_reply);
 613 int32_t ctdb_control_db_thaw(struct ctdb_context *ctdb, uint32_t db_id);
 614
 615 int32_t ctdb_control_freeze(struct ctdb_context *ctdb,
 616                             struct ctdb_req_control_old *c, bool *async_reply);
 617 int32_t ctdb_control_thaw(struct ctdb_context *ctdb, bool check_recmode);
 618
 619 bool ctdb_blocking_freeze(struct ctdb_context *ctdb);
 620
 621 int32_t ctdb_control_db_transaction_start(struct ctdb_context *ctdb,
 622                                           TDB_DATA indata);
 623 int32_t ctdb_control_db_transaction_cancel(struct ctdb_context *ctdb,
 624                                            TDB_DATA indata);
 625 int32_t ctdb_control_db_transaction_commit(struct ctdb_context *ctdb,
 626                                            TDB_DATA indata);
 627
 628 int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata);
 629
 630 bool ctdb_db_frozen(struct ctdb_db_context *ctdb_db);
 631 bool ctdb_db_all_frozen(struct ctdb_context *ctdb);
 632 bool ctdb_db_allow_access(struct ctdb_db_context *ctdb_db);
 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 void ctdb_request_keepalive(struct ctdb_context *ctdb,
 640                             struct ctdb_req_header *hdr);
 641
 642 /* from server/ctdb_lock.c */
 643
 644 struct lock_request;
 645
 646 typedef int (*ctdb_db_handler_t)(struct ctdb_db_context *ctdb_db,
 647                                  void *private_data);
 648
 649 int ctdb_db_iterator(struct ctdb_context *ctdb, ctdb_db_handler_t handler,
 650                      void *private_data);
 651
 652 int ctdb_lockdb_mark(struct ctdb_db_context *ctdb_db);
 653
 654 int ctdb_lockdb_unmark(struct ctdb_db_context *ctdb_db);
 655
 656 struct lock_request *ctdb_lock_record(TALLOC_CTX *mem_ctx,
 657                                       struct ctdb_db_context *ctdb_db,
 658                                       TDB_DATA key,
 659                                       bool auto_mark,
 660                                       void (*callback)(void *, bool),
 661                                       void *private_data);
 662
 663 struct lock_request *ctdb_lock_db(TALLOC_CTX *mem_ctx,
 664                                   struct ctdb_db_context *ctdb_db,
 665                                   bool auto_mark,
 666                                   void (*callback)(void *, bool),
 667                                   void *private_data);
 668
 669 /* from ctdb_logging.c */
 670
 671 bool ctdb_logging_init(TALLOC_CTX *mem_ctx, const char *logging,
 672                        const char *debug_level);
 673
 674 struct ctdb_log_state *ctdb_vfork_with_logging(TALLOC_CTX *mem_ctx,
 675                                                struct ctdb_context *ctdb,
 676                                                const char *log_prefix,
 677                                                const char *helper,
 678                                                int helper_argc,
 679                                                const char **helper_argv,
 680                                                void (*logfn)(const char *,
 681                                                              uint16_t, void *),
 682                                                void *logfn_private, pid_t *pid);
 683
 684 int ctdb_set_child_logging(struct ctdb_context *ctdb);
 685
 686 /* from ctdb_logging_file.c */
 687
 688 void ctdb_log_init_file(void);
 689
 690 /* from ctdb_logging_syslog.c */
 691
 692 void ctdb_log_init_syslog(void);
 693
 694 /* from ctdb_ltdb_server.c */
 695
 696 int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db,
 697                            TDB_DATA key, struct ctdb_req_header *hdr,
 698                            void (*recv_pkt)(void *, struct ctdb_req_header *),
 699                            void *recv_context, bool ignore_generation);
 700
 701 int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db,
 702                                  TDB_DATA key, struct ctdb_ltdb_header *header,
 703                                  struct ctdb_req_header *hdr, TDB_DATA *data,
 704                                  void (*recv_pkt)(void *, struct ctdb_req_header *),
 705                                  void *recv_context, bool ignore_generation);
 706
 707 int ctdb_load_persistent_health(struct ctdb_context *ctdb,
 708                                 struct ctdb_db_context *ctdb_db);
 709 int ctdb_update_persistent_health(struct ctdb_context *ctdb,
 710                                   struct ctdb_db_context *ctdb_db,
 711                                   const char *reason,/* NULL means healthy */
 712                                   int num_healthy_nodes);
 713 int ctdb_recheck_persistent_health(struct ctdb_context *ctdb);
 714
 715 int32_t ctdb_control_db_set_healthy(struct ctdb_context *ctdb,
 716                                     TDB_DATA indata);
 717 int32_t ctdb_control_db_get_health(struct ctdb_context *ctdb,
 718                                    TDB_DATA indata, TDB_DATA *outdata);
 719
 720 int ctdb_set_db_readonly(struct ctdb_context *ctdb,
 721                          struct ctdb_db_context *ctdb_db);
 722
 723 int ctdb_process_deferred_attach(struct ctdb_context *ctdb);
 724
 725 int32_t ctdb_control_db_attach(struct ctdb_context *ctdb, TDB_DATA indata,
 726                                TDB_DATA *outdata,
 727                                uint8_t db_flags, uint32_t client_id,
 728                                struct ctdb_req_control_old *c,
 729                                bool *async_reply);
 730 int32_t ctdb_control_db_detach(struct ctdb_context *ctdb, TDB_DATA indata,
 731                                uint32_t client_id);
 732
 733 int ctdb_attach_databases(struct ctdb_context *ctdb);
 734
 735 int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id,
 736                                 uint32_t srcnode);
 737 int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id);
 738
 739 int ctdb_set_db_sticky(struct ctdb_context *ctdb,
 740                        struct ctdb_db_context *ctdb_db);
 741
 742 void ctdb_db_statistics_reset(struct ctdb_db_context *ctdb_db);
 743
 744 int32_t ctdb_control_get_db_statistics(struct ctdb_context *ctdb,
 745                                        uint32_t db_id, TDB_DATA *outdata);
 746
 747 /* from ctdb_monitor.c */
 748
 749 int ctdb_set_notification_script(struct ctdb_context *ctdb, const char *script);
 750 void ctdb_run_notification_script(struct ctdb_context *ctdb, const char *event);
 751
 752 void ctdb_stop_monitoring(struct ctdb_context *ctdb);
 753
 754 void ctdb_wait_for_first_recovery(struct ctdb_context *ctdb);
 755
 756 int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata);
 757
 758 /* from ctdb_persistent.c */
 759
 760 void ctdb_persistent_finish_trans3_commits(struct ctdb_context *ctdb);
 761
 762 int32_t ctdb_control_trans3_commit(struct ctdb_context *ctdb,
 763                                    struct ctdb_req_control_old *c,
 764                                    TDB_DATA recdata, bool *async_reply);
 765
 766 int32_t ctdb_control_start_persistent_update(struct ctdb_context *ctdb,
 767                                              struct ctdb_req_control_old *c,
 768                                              TDB_DATA recdata);
 769 int32_t ctdb_control_cancel_persistent_update(struct ctdb_context *ctdb,
 770                                               struct ctdb_req_control_old *c,
 771                                               TDB_DATA recdata);
 772
 773 int32_t ctdb_control_get_db_seqnum(struct ctdb_context *ctdb,
 774                                    TDB_DATA indata, TDB_DATA *outdata);
 775
 776 /* from ctdb_recover.c */
 777
 778 int ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 779                            TDB_DATA indata, TDB_DATA *outdata);
 780 int ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 781                            TDB_DATA indata, TDB_DATA *outdata);
 782
 783 int ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode,
 784                           TDB_DATA indata, TDB_DATA *outdata);
 785 int ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode,
 786                             TDB_DATA indata, TDB_DATA *outdata);
 787
 788 int ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode);
 789
 790 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata,
 791                              TDB_DATA *outdata);
 792 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata);
 793
 794 int32_t ctdb_control_db_pull(struct ctdb_context *ctdb,
 795                              struct ctdb_req_control_old *c,
 796                              TDB_DATA indata, TDB_DATA *outdata);
 797 int32_t ctdb_control_db_push_start(struct ctdb_context *ctdb,
 798                                    TDB_DATA indata);
 799 int32_t ctdb_control_db_push_confirm(struct ctdb_context *ctdb,
 800                                      TDB_DATA indata, TDB_DATA *outdata);
 801
 802 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb);
 803
 804 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
 805                                  struct ctdb_req_control_old *c,
 806                                  TDB_DATA indata, bool *async_reply,
 807                                  const char **errormsg);
 808
 809 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
 810                                  struct ctdb_req_control_old *c,
 811                                  bool *async_reply);
 812 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
 813                                  struct ctdb_req_control_old *c,
 814                                  bool *async_reply);
 815
 816 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb,
 817                                         TDB_DATA indata, TDB_DATA *outdata);
 818 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
 819                                      TDB_DATA indata, TDB_DATA *outdata);
 820
 821 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb,
 822                                       TDB_DATA *outdata);
 823
 824 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb);
 825 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb,
 826                                    uint32_t opcode, TDB_DATA indata);
 827
 828 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb);
 829 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb);
 830
 831 /* from ctdb_recoverd.c */
 832
 833 int ctdb_start_recoverd(struct ctdb_context *ctdb);
 834 void ctdb_stop_recoverd(struct ctdb_context *ctdb);
 835
 836 /* from ctdb_server.c */
 837
 838 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
 839
 840 int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const ctdb_sock_addr *nodeip);
 841
 842 void ctdb_load_nodes_file(struct ctdb_context *ctdb);
 843
 844 int ctdb_set_address(struct ctdb_context *ctdb, const char *address);
 845
 846 uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb);
 847
 848 void ctdb_input_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *);
 849
 850 void ctdb_node_dead(struct ctdb_node *node);
 851 void ctdb_node_connected(struct ctdb_node *node);
 852
 853 void ctdb_queue_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 854 void ctdb_queue_packet_opcode(struct ctdb_context *ctdb,
 855                               struct ctdb_req_header *hdr, unsigned opcode);
 856
 857 /* from ctdb_serverids.c */
 858
 859 int32_t ctdb_control_register_server_id(struct ctdb_context *ctdb,
 860                                         uint32_t client_id, TDB_DATA indata);
 861 int32_t ctdb_control_check_server_id(struct ctdb_context *ctdb,
 862                                      TDB_DATA indata);
 863 int32_t ctdb_control_unregister_server_id(struct ctdb_context *ctdb,
 864                                           TDB_DATA indata);
 865 int32_t ctdb_control_get_server_id_list(struct ctdb_context *ctdb,
 866                                         TDB_DATA *outdata);
 867
 868 /* from ctdb_statistics.c */
 869
 870 int ctdb_statistics_init(struct ctdb_context *ctdb);
 871
 872 int32_t ctdb_control_get_stat_history(struct ctdb_context *ctdb,
 873                                       struct ctdb_req_control_old *c,
 874                                       TDB_DATA *outdata);
 875
 876 /* from ctdb_takeover.c */
 877
 878 int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
 879                                  struct ctdb_req_control_old *c,
 880                                  TDB_DATA indata,
 881                                  bool *async_reply);
 882 int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
 883                                  struct ctdb_req_control_old *c,
 884                                  TDB_DATA indata,
 885                                  bool *async_reply);
 886 int32_t ctdb_control_ipreallocated(struct ctdb_context *ctdb,
 887                                  struct ctdb_req_control_old *c,
 888                                  bool *async_reply);
 889
 890 int ctdb_set_public_addresses(struct ctdb_context *ctdb, bool check_addresses);
 891
 892 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id,
 893                                 TDB_DATA indata);
 894 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata,
 895                              bool tcp_update_needed);
 896 int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata);
 897 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn);
 898
 899 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client);
 900
 901 void ctdb_release_all_ips(struct ctdb_context *ctdb);
 902
 903 int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb,
 904                                     struct ctdb_req_control_old *c,
 905                                     TDB_DATA *outdata);
 906 int32_t ctdb_control_get_public_ip_info(struct ctdb_context *ctdb,
 907                                         struct ctdb_req_control_old *c,
 908                                         TDB_DATA indata, TDB_DATA *outdata);
 909
 910 int32_t ctdb_control_get_ifaces(struct ctdb_context *ctdb,
 911                                 struct ctdb_req_control_old *c,
 912                                 TDB_DATA *outdata);
 913 int32_t ctdb_control_set_iface_link(struct ctdb_context *ctdb,
 914                                     struct ctdb_req_control_old *c,
 915                                     TDB_DATA indata);
 916
 917 int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb,
 918                                          TDB_DATA indata);
 919 int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb,
 920                                          TDB_DATA indata, TDB_DATA *outdata);
 921
 922 void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb);
 923
 924 int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb,
 925                                        TDB_DATA indata);
 926
 927 int32_t ctdb_control_add_public_address(struct ctdb_context *ctdb,
 928                                         TDB_DATA indata);
 929 int32_t ctdb_control_del_public_address(struct ctdb_context *ctdb,
 930                                         TDB_DATA recdata);
 931
 932 int32_t ctdb_control_reload_public_ips(struct ctdb_context *ctdb,
 933                                        struct ctdb_req_control_old *c,
 934                                        bool *async_reply);
 935
 936 /* from ctdb_traverse.c */
 937
 938 int32_t ctdb_control_traverse_all_ext(struct ctdb_context *ctdb,
 939                                       TDB_DATA data, TDB_DATA *outdata);
 940 int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb,
 941                                   TDB_DATA data, TDB_DATA *outdata);
 942 int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb,
 943                                    TDB_DATA data, TDB_DATA *outdata);
 944 int32_t ctdb_control_traverse_kill(struct ctdb_context *ctdb, TDB_DATA indata,
 945                                     TDB_DATA *outdata, uint32_t srcnode);
 946
 947 int32_t ctdb_control_traverse_start_ext(struct ctdb_context *ctdb,
 948                                         TDB_DATA indata, TDB_DATA *outdata,
 949                                         uint32_t srcnode, uint32_t client_id);
 950 int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb,
 951                                     TDB_DATA indata, TDB_DATA *outdata,
 952                                     uint32_t srcnode, uint32_t client_id);
 953
 954 /* from ctdb_tunables.c */
 955
 956 void ctdb_tunables_set_defaults(struct ctdb_context *ctdb);
 957
 958 int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
 959                                  TDB_DATA *outdata);
 960 int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata);
 961 int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb,
 962                                    TDB_DATA *outdata);
 963
 964 /* from ctdb_update_record.c */
 965
 966 int32_t ctdb_control_update_record(struct ctdb_context *ctdb,
 967                                    struct ctdb_req_control_old *c,
 968                                    TDB_DATA recdata, bool *async_reply);
 969
 970 /* from ctdb_uptime.c */
 971
 972 int32_t ctdb_control_uptime(struct ctdb_context *ctdb, TDB_DATA *outdata);
 973
 974 /* from ctdb_vacuum.c */
 975
 976 void ctdb_stop_vacuuming(struct ctdb_context *ctdb);
 977 int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db);
 978
 979 int32_t ctdb_control_schedule_for_deletion(struct ctdb_context *ctdb,
 980                                            TDB_DATA indata);
 981 int32_t ctdb_local_schedule_for_deletion(struct ctdb_db_context *ctdb_db,
 982                                          const struct ctdb_ltdb_header *hdr,
 983                                          TDB_DATA key);
 984
 985 void ctdb_local_remove_from_delete_queue(struct ctdb_db_context *ctdb_db,
 986                                          const struct ctdb_ltdb_header *hdr,
 987                                          const TDB_DATA key);
 988
 989 /* from eventscript.c */
 990
 991 int ctdb_start_eventd(struct ctdb_context *ctdb);
 992 void ctdb_stop_eventd(struct ctdb_context *ctdb);
 993
 994 int ctdb_event_script_callback(struct ctdb_context *ctdb,
 995                                TALLOC_CTX *mem_ctx,
 996                                void (*callback)(struct ctdb_context *,
 997                                                 int, void *),
 998                                void *private_data,
 999                                enum ctdb_event call,
1000                                const char *fmt, ...) PRINTF_ATTRIBUTE(6,7);
1001
1002 int ctdb_event_script_args(struct ctdb_context *ctdb,
1003                            enum ctdb_event call,
1004                            const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
1005
1006 int ctdb_event_script(struct ctdb_context *ctdb,
1007                       enum ctdb_event call);
1008
1009 #endif