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 typedef int (*ctdb_fn_t)(struct ctdb_call_info *);
  40
  41 struct ctdb_registered_call {
  42         struct ctdb_registered_call *next, *prev;
  43         uint32_t id;
  44         ctdb_fn_t fn;
  45 };
  46
  47 /*
  48   check that a pnn is valid
  49  */
  50 #define ctdb_validate_pnn(ctdb, pnn) (((uint32_t)(pnn)) < (ctdb)->num_nodes)
  51
  52 /* used for callbacks in ctdb_control requests */
  53 typedef void (*ctdb_control_callback_fn_t)(struct ctdb_context *,
  54                                            int32_t status, TDB_DATA data,
  55                                            const char *errormsg,
  56                                            void *private_data);
  57 /*
  58   structure describing a connected client in the daemon
  59  */
  60 struct ctdb_client {
  61         struct ctdb_context *ctdb;
  62         int fd;
  63         struct ctdb_queue *queue;
  64         uint32_t client_id;
  65         pid_t pid;
  66         struct ctdb_tcp_list *tcp_list;
  67         uint32_t db_id;
  68         uint32_t num_persistent_updates;
  69         struct ctdb_client_notify_list *notify;
  70 };
  71
  72 /*
  73   state associated with one node
  74 */
  75 struct ctdb_node {
  76         struct ctdb_context *ctdb;
  77         ctdb_sock_addr address;
  78         const char *name; /* for debug messages */
  79         void *transport_data; /* private to transport */
  80         uint32_t pnn;
  81         uint32_t flags;
  82
  83         /* used by the dead node monitoring */
  84         uint32_t dead_count;
  85         uint32_t rx_cnt;
  86         uint32_t tx_cnt;
  87
  88         /* a list of controls pending to this node, so we can time them out quickly
  89            if the node becomes disconnected */
  90         struct daemon_control_state *pending_controls;
  91 };
  92
  93 /*
  94   transport specific methods
  95 */
  96 struct ctdb_methods {
  97         int (*initialise)(struct ctdb_context *); /* initialise transport structures */
  98         int (*start)(struct ctdb_context *); /* start the transport */
  99         int (*add_node)(struct ctdb_node *); /* setup a new node */
 100         int (*connect_node)(struct ctdb_node *); /* connect to node */
 101         int (*queue_pkt)(struct ctdb_node *, uint8_t *data, uint32_t length);
 102         void *(*allocate_pkt)(TALLOC_CTX *mem_ctx, size_t );
 103         void (*shutdown)(struct ctdb_context *); /* shutdown transport */
 104         void (*restart)(struct ctdb_node *); /* stop and restart the connection */
 105 };
 106
 107 /*
 108   transport calls up to the ctdb layer
 109 */
 110 struct ctdb_upcalls {
 111         /* recv_pkt is called when a packet comes in */
 112         void (*recv_pkt)(struct ctdb_context *, uint8_t *data, uint32_t length);
 113
 114         /* node_dead is called when an attempt to send to a node fails */
 115         void (*node_dead)(struct ctdb_node *);
 116
 117         /* node_connected is called when a connection to a node is established */
 118         void (*node_connected)(struct ctdb_node *);
 119 };
 120
 121 /* additional data required for the daemon mode */
 122 struct ctdb_daemon_data {
 123         int sd;
 124         char *name;
 125         struct ctdb_queue *queue;
 126 };
 127
 128
 129 #define CTDB_UPDATE_STAT(ctdb, counter, value) \
 130         {                                                                               \
 131                 if (value > ctdb->statistics.counter) {                                 \
 132                         ctdb->statistics.counter = value;                               \
 133                 }                                                                       \
 134                 if (value > ctdb->statistics_current.counter) {                         \
 135                         ctdb->statistics_current.counter = value;                       \
 136                 }                                                                       \
 137         }
 138
 139 #define CTDB_INCREMENT_STAT(ctdb, counter) \
 140         {                                                                               \
 141                 ctdb->statistics.counter++;                                             \
 142                 ctdb->statistics_current.counter++;                                     \
 143         }
 144
 145 #define CTDB_DECREMENT_STAT(ctdb, counter) \
 146         {                                                                               \
 147                 if (ctdb->statistics.counter > 0)                                       \
 148                         ctdb->statistics.counter--;                                     \
 149                 if (ctdb->statistics_current.counter > 0)                               \
 150                         ctdb->statistics_current.counter--;                             \
 151         }
 152
 153 #define CTDB_INCREMENT_DB_STAT(ctdb_db, counter) \
 154         {                                                                               \
 155                 ctdb_db->statistics.counter++;                                          \
 156         }
 157
 158 #define CTDB_DECREMENT_DB_STAT(ctdb_db, counter) \
 159         {                                                                               \
 160                 if (ctdb_db->statistics.counter > 0)                                    \
 161                         ctdb_db->statistics.counter--;                                  \
 162         }
 163
 164 #define CTDB_UPDATE_RECLOCK_LATENCY(ctdb, name, counter, value) \
 165         {                                                                               \
 166                 if (value > ctdb->statistics.counter.max)                               \
 167                         ctdb->statistics.counter.max = value;                           \
 168                 if (value > ctdb->statistics_current.counter.max)                       \
 169                         ctdb->statistics_current.counter.max = value;                   \
 170                                                                                         \
 171                 if (ctdb->statistics.counter.num == 0 ||                                \
 172                     value < ctdb->statistics.counter.min)                               \
 173                         ctdb->statistics.counter.min = value;                           \
 174                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 175                     value < ctdb->statistics_current.counter.min)                       \
 176                         ctdb->statistics_current.counter.min = value;                   \
 177                                                                                         \
 178                 ctdb->statistics.counter.total += value;                                \
 179                 ctdb->statistics_current.counter.total += value;                        \
 180                                                                                         \
 181                 ctdb->statistics.counter.num++;                                         \
 182                 ctdb->statistics_current.counter.num++;                                 \
 183                                                                                         \
 184                 if (ctdb->tunable.reclock_latency_ms != 0) {                            \
 185                         if (value*1000 > ctdb->tunable.reclock_latency_ms) {            \
 186                                 DEBUG(DEBUG_ERR,                                        \
 187                                       ("High RECLOCK latency %fs for operation %s\n",   \
 188                                        value, name));                                   \
 189                         }                                                               \
 190                 }                                                                       \
 191         }
 192
 193 #define CTDB_UPDATE_DB_LATENCY(ctdb_db, operation, counter, value)                      \
 194         {                                                                               \
 195                 if (value > ctdb_db->statistics.counter.max)                            \
 196                         ctdb_db->statistics.counter.max = value;                        \
 197                 if (ctdb_db->statistics.counter.num == 0 ||                             \
 198                     value < ctdb_db->statistics.counter.min)                            \
 199                         ctdb_db->statistics.counter.min = value;                        \
 200                                                                                         \
 201                 ctdb_db->statistics.counter.total += value;                             \
 202                 ctdb_db->statistics.counter.num++;                                      \
 203                                                                                         \
 204                 if (ctdb_db->ctdb->tunable.log_latency_ms != 0) {                       \
 205                         if (value*1000 > ctdb_db->ctdb->tunable.log_latency_ms) {       \
 206                                 DEBUG(DEBUG_ERR,                                        \
 207                                       ("High latency %.6fs for operation %s on database %s\n",\
 208                                        value, operation, ctdb_db->db_name));            \
 209                         }                                                               \
 210                 }                                                                       \
 211         }
 212
 213 #define CTDB_UPDATE_LATENCY(ctdb, db, operation, counter, t) \
 214         {                                                                               \
 215                 double l = timeval_elapsed(&t);                                         \
 216                                                                                         \
 217                 if (l > ctdb->statistics.counter.max)                                   \
 218                         ctdb->statistics.counter.max = l;                               \
 219                 if (l > ctdb->statistics_current.counter.max)                           \
 220                         ctdb->statistics_current.counter.max = l;                       \
 221                                                                                         \
 222                 if (ctdb->statistics.counter.num == 0 ||                                \
 223                     l < ctdb->statistics.counter.min)                                   \
 224                         ctdb->statistics.counter.min = l;                               \
 225                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 226                     l < ctdb->statistics_current.counter.min)                           \
 227                         ctdb->statistics_current.counter.min = l;                       \
 228                                                                                         \
 229                 ctdb->statistics.counter.total += l;                                    \
 230                 ctdb->statistics_current.counter.total += l;                            \
 231                                                                                         \
 232                 ctdb->statistics.counter.num++;                                         \
 233                 ctdb->statistics_current.counter.num++;                                 \
 234                                                                                         \
 235                 if (ctdb->tunable.log_latency_ms != 0) {                                \
 236                         if (l*1000 > ctdb->tunable.log_latency_ms) {                    \
 237                                 DEBUG(DEBUG_WARNING,                                    \
 238                                       ("High latency %.6fs for operation %s on database %s\n",\
 239                                        l, operation, db->db_name));                     \
 240                         }                                                               \
 241                 }                                                                       \
 242         }
 243
 244
 245 struct ctdb_cluster_mutex_handle;
 246 struct eventd_context;
 247
 248 enum ctdb_freeze_mode {CTDB_FREEZE_NONE, CTDB_FREEZE_PENDING, CTDB_FREEZE_FROZEN};
 249
 250 /* main state of the ctdb daemon */
 251 struct ctdb_context {
 252         struct tevent_context *ev;
 253         struct timeval ctdbd_start_time;
 254         struct timeval last_recovery_started;
 255         struct timeval last_recovery_finished;
 256         uint32_t recovery_mode;
 257         TALLOC_CTX *tickle_update_context;
 258         TALLOC_CTX *keepalive_ctx;
 259         TALLOC_CTX *check_public_ifaces_ctx;
 260         struct ctdb_tunable_list tunable;
 261         enum ctdb_freeze_mode freeze_mode;
 262         struct ctdb_freeze_handle *freeze_handle;
 263         bool freeze_transaction_started;
 264         uint32_t freeze_transaction_id;
 265         ctdb_sock_addr *address;
 266         const char *name;
 267         const char *db_directory;
 268         const char *db_directory_persistent;
 269         const char *db_directory_state;
 270         struct tdb_wrap *db_persistent_health;
 271         uint32_t db_persistent_startup_generation;
 272         uint64_t db_persistent_check_errors;
 273         uint64_t max_persistent_check_errors;
 274         const char *transport;
 275         const char *recovery_lock;
 276         uint32_t pnn; /* our own pnn */
 277         uint32_t num_nodes;
 278         uint32_t num_connected;
 279         unsigned flags;
 280         uint32_t capabilities;
 281         struct reqid_context *idr;
 282         struct ctdb_node **nodes; /* array of nodes in the cluster - indexed by vnn */
 283         struct ctdb_vnn *vnn; /* list of public ip addresses and interfaces */
 284         struct ctdb_interface *ifaces; /* list of local interfaces */
 285         char *err_msg;
 286         const struct ctdb_methods *methods; /* transport methods */
 287         const struct ctdb_upcalls *upcalls; /* transport upcalls */
 288         void *transport_data; /* private to transport */
 289         struct ctdb_db_context *db_list;
 290         struct srvid_context *srv;
 291         struct srvid_context *tunnels;
 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         struct ctdb_client_ip *client_ip_list;
 300         bool do_checkpublicip;
 301         bool do_setsched;
 302         const char *event_script_dir;
 303         const char *notification_script;
 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 *vacuumer;
 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_hot_key {
 342         uint32_t count;
 343         TDB_DATA key;
 344         uint32_t last_logged_count;
 345 };
 346
 347 struct ctdb_db_context {
 348         struct ctdb_db_context *next, *prev;
 349         struct ctdb_context *ctdb;
 350         uint32_t db_id;
 351         uint8_t db_flags;
 352         const char *db_name;
 353         const char *db_path;
 354         struct tdb_wrap *ltdb;
 355         struct tdb_context *rottdb; /* ReadOnly tracking TDB */
 356         struct ctdb_registered_call *calls; /* list of registered calls */
 357         uint32_t seqnum;
 358         struct tevent_timer *seqnum_update;
 359         struct ctdb_traverse_local_handle *traverse;
 360         struct ctdb_vacuum_handle *vacuum_handle;
 361         char *unhealthy_reason;
 362         int pending_requests;
 363         struct revokechild_handle *revokechild_active;
 364         struct ctdb_persistent_state *persistent_state;
 365         struct trbt_tree *delete_queue;
 366         struct trbt_tree *fetch_queue;
 367         struct trbt_tree *sticky_records;
 368         int (*ctdb_ltdb_store_fn)(struct ctdb_db_context *ctdb_db,
 369                                   TDB_DATA key,
 370                                   struct ctdb_ltdb_header *header,
 371                                   TDB_DATA data);
 372
 373         /* used to track which records we are currently fetching
 374            so we can avoid sending duplicate fetch requests
 375         */
 376         struct trbt_tree *deferred_fetch;
 377         struct trbt_tree *defer_dmaster;
 378
 379         struct ctdb_db_statistics_old statistics;
 380         struct ctdb_db_hot_key hot_keys[MAX_HOT_KEYS];
 381
 382         struct lock_context *lock_current;
 383         struct lock_context *lock_pending;
 384         unsigned int lock_num_current;
 385         struct db_hash_context *lock_log;
 386
 387         struct ctdb_call_state *pending_calls;
 388
 389         enum ctdb_freeze_mode freeze_mode;
 390         struct ctdb_db_freeze_handle *freeze_handle;
 391         bool freeze_transaction_started;
 392         uint32_t freeze_transaction_id;
 393         uint32_t generation;
 394
 395         bool invalid_records;
 396         bool push_started;
 397         void *push_state;
 398
 399         struct hash_count_context *migratedb;
 400 };
 401
 402
 403 #define CTDB_NO_MEMORY(ctdb, p) do { if (!(p)) { \
 404           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 405           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 406           return -1; }} while (0)
 407
 408 #define CTDB_NO_MEMORY_VOID(ctdb, p) do { if (!(p)) { \
 409           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 410           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 411           return; }} while (0)
 412
 413 #define CTDB_NO_MEMORY_NULL(ctdb, p) do { if (!(p)) { \
 414           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 415           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 416           return NULL; }} while (0)
 417
 418 #define CTDB_NO_MEMORY_FATAL(ctdb, p) do { if (!(p)) { \
 419           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 420           ctdb_fatal(ctdb, "Out of memory in " __location__ ); \
 421           }} while (0)
 422
 423
 424 enum call_state {CTDB_CALL_WAIT, CTDB_CALL_DONE, CTDB_CALL_ERROR};
 425
 426 /*
 427   state of a in-progress ctdb call
 428 */
 429 struct ctdb_call_state {
 430         struct ctdb_call_state *next, *prev;
 431         enum call_state state;
 432         uint32_t reqid;
 433         struct ctdb_req_call_old *c;
 434         struct ctdb_db_context *ctdb_db;
 435         const char *errmsg;
 436         struct ctdb_call *call;
 437         uint32_t generation;
 438         struct {
 439                 void (*fn)(struct ctdb_call_state *);
 440                 void *private_data;
 441         } async;
 442 };
 443
 444 /* internal prototypes */
 445
 446 #define CHECK_CONTROL_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 #define CHECK_CONTROL_MIN_DATA_SIZE(size) do { \
 455  if (indata.dsize < size) { \
 456          DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected >= %u\n", \
 457                   opcode, (unsigned)indata.dsize, (unsigned)size));     \
 458          return -1; \
 459  } \
 460  } while (0)
 461
 462 /*
 463   state of a in-progress ctdb call in client
 464 */
 465 struct ctdb_client_call_state {
 466         enum call_state state;
 467         uint32_t reqid;
 468         struct ctdb_db_context *ctdb_db;
 469         struct ctdb_call *call;
 470         struct {
 471                 void (*fn)(struct ctdb_client_call_state *);
 472                 void *private_data;
 473         } async;
 474 };
 475
 476 extern int script_log_level;
 477 extern bool fast_start;
 478 extern const char *ctdbd_pidfile;
 479
 480 typedef void (*deferred_requeue_fn)(void *call_context, struct ctdb_req_header *hdr);
 481
 482
 483 /* from tcp/ and ib/ */
 484
 485 int ctdb_tcp_init(struct ctdb_context *ctdb);
 486 int ctdb_ibw_init(struct ctdb_context *ctdb);
 487
 488 /* from ctdb_banning.c */
 489
 490 int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata);
 491 int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata);
 492 void ctdb_ban_self(struct ctdb_context *ctdb);
 493
 494 /* from ctdb_call.c */
 495
 496 struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id);
 497
 498 void ctdb_request_dmaster(struct ctdb_context *ctdb,
 499                           struct ctdb_req_header *hdr);
 500 void ctdb_reply_dmaster(struct ctdb_context *ctdb,
 501                         struct ctdb_req_header *hdr);
 502 void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 503 void ctdb_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 504 void ctdb_reply_error(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 505
 506 void ctdb_call_resend_db(struct ctdb_db_context *ctdb);
 507 void ctdb_call_resend_all(struct ctdb_context *ctdb);
 508
 509 struct ctdb_call_state *ctdb_call_local_send(struct ctdb_db_context *ctdb_db,
 510                                              struct ctdb_call *call,
 511                                              struct ctdb_ltdb_header *header,
 512                                              TDB_DATA *data);
 513
 514 struct ctdb_call_state *ctdb_daemon_call_send_remote(
 515                                         struct ctdb_db_context *ctdb_db,
 516                                         struct ctdb_call *call,
 517                                         struct ctdb_ltdb_header *header);
 518 int ctdb_daemon_call_recv(struct ctdb_call_state *state,
 519                           struct ctdb_call *call);
 520
 521 int ctdb_start_revoke_ro_record(struct ctdb_context *ctdb,
 522                                 struct ctdb_db_context *ctdb_db,
 523                                 TDB_DATA key, struct ctdb_ltdb_header *header,
 524                                 TDB_DATA data);
 525
 526 int ctdb_add_revoke_deferred_call(struct ctdb_context *ctdb,
 527                                   struct ctdb_db_context *ctdb_db,
 528                                   TDB_DATA key, struct ctdb_req_header *hdr,
 529                                   deferred_requeue_fn fn, void *call_context);
 530
 531 int ctdb_migration_init(struct ctdb_db_context *ctdb_db);
 532
 533 /* from server/ctdb_control.c */
 534
 535 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata);
 536
 537 void ctdb_request_control_reply(struct ctdb_context *ctdb,
 538                                 struct ctdb_req_control_old *c,
 539                                 TDB_DATA *outdata, int32_t status,
 540                                 const char *errormsg);
 541
 542 void ctdb_request_control(struct ctdb_context *ctdb,
 543                           struct ctdb_req_header *hdr);
 544 void ctdb_reply_control(struct ctdb_context *ctdb,
 545                         struct ctdb_req_header *hdr);
 546
 547 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
 548                              uint64_t srvid, uint32_t opcode,
 549                              uint32_t client_id, uint32_t flags,
 550                              TDB_DATA data,
 551                              ctdb_control_callback_fn_t callback,
 552                              void *private_data);
 553
 554 /* from server/ctdb_daemon.c */
 555
 556 int daemon_register_message_handler(struct ctdb_context *ctdb,
 557                                     uint32_t client_id, uint64_t srvid);
 558 int daemon_deregister_message_handler(struct ctdb_context *ctdb,
 559                                       uint32_t client_id, uint64_t srvid);
 560
 561 void daemon_tunnel_handler(uint64_t tunnel_id, TDB_DATA data,
 562                            void *private_data);
 563
 564 struct ctdb_node *ctdb_find_node(struct ctdb_context *ctdb, uint32_t pnn);
 565
 566 int ctdb_start_daemon(struct ctdb_context *ctdb,
 567                       bool interactive,
 568                       bool test_mode_enabled);
 569
 570 struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb,
 571                                                  TALLOC_CTX *mem_ctx,
 572                                                  enum ctdb_operation operation,
 573                                                  size_t length, size_t slength,
 574                                                  const char *type);
 575
 576 #define ctdb_transport_allocate(ctdb, mem_ctx, operation, length, type) \
 577         (type *)_ctdb_transport_allocate(ctdb, mem_ctx, operation, length, \
 578                                          sizeof(type), #type)
 579
 580 void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb,
 581                                  struct ctdb_node *node);
 582
 583 int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id,
 584                          ctdb_fn_t fn, int id);
 585
 586 int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t pnn,
 587                              uint64_t srvid, TDB_DATA data);
 588
 589 int32_t ctdb_control_register_notify(struct ctdb_context *ctdb,
 590                                      uint32_t client_id, TDB_DATA indata);
 591 int32_t ctdb_control_deregister_notify(struct ctdb_context *ctdb,
 592                                        uint32_t client_id, TDB_DATA indata);
 593
 594 struct ctdb_client *ctdb_find_client_by_pid(struct ctdb_context *ctdb,
 595                                             pid_t pid);
 596
 597 int32_t ctdb_control_process_exists(struct ctdb_context *ctdb, pid_t pid);
 598 int32_t ctdb_control_check_pid_srvid(struct ctdb_context *ctdb,
 599                                      TDB_DATA indata);
 600
 601 int ctdb_control_getnodesfile(struct ctdb_context *ctdb, uint32_t opcode,
 602                               TDB_DATA indata, TDB_DATA *outdata);
 603
 604 void ctdb_shutdown_sequence(struct ctdb_context *ctdb, int exit_code);
 605
 606 int switch_from_server_to_client(struct ctdb_context *ctdb);
 607
 608 /* From server/ctdb_fork.c */
 609
 610 void ctdb_track_child(struct ctdb_context *ctdb, pid_t pid);
 611
 612 pid_t ctdb_fork(struct ctdb_context *ctdb);
 613 pid_t ctdb_vfork_exec(TALLOC_CTX *mem_ctx, struct ctdb_context *ctdb,
 614                       const char *helper, int helper_argc,
 615                       const char **helper_argv);
 616
 617 struct tevent_signal *ctdb_init_sigchld(struct ctdb_context *ctdb);
 618
 619 int ctdb_kill(struct ctdb_context *ctdb, pid_t pid, int signum);
 620
 621 /* from server/ctdb_freeze.c */
 622
 623 int32_t ctdb_control_db_freeze(struct ctdb_context *ctdb,
 624                                struct ctdb_req_control_old *c,
 625                                uint32_t db_id, bool *async_reply);
 626 int32_t ctdb_control_db_thaw(struct ctdb_context *ctdb, uint32_t db_id);
 627
 628 int32_t ctdb_control_freeze(struct ctdb_context *ctdb,
 629                             struct ctdb_req_control_old *c, bool *async_reply);
 630 int32_t ctdb_control_thaw(struct ctdb_context *ctdb, bool check_recmode);
 631
 632 bool ctdb_blocking_freeze(struct ctdb_context *ctdb);
 633
 634 int32_t ctdb_control_db_transaction_start(struct ctdb_context *ctdb,
 635                                           TDB_DATA indata);
 636 int32_t ctdb_control_db_transaction_cancel(struct ctdb_context *ctdb,
 637                                            TDB_DATA indata);
 638 int32_t ctdb_control_db_transaction_commit(struct ctdb_context *ctdb,
 639                                            TDB_DATA indata);
 640
 641 int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata);
 642
 643 bool ctdb_db_frozen(struct ctdb_db_context *ctdb_db);
 644 bool ctdb_db_all_frozen(struct ctdb_context *ctdb);
 645 bool ctdb_db_allow_access(struct ctdb_db_context *ctdb_db);
 646
 647 /* from server/ctdb_keepalive.c */
 648
 649 void ctdb_start_keepalive(struct ctdb_context *ctdb);
 650 void ctdb_stop_keepalive(struct ctdb_context *ctdb);
 651
 652 void ctdb_request_keepalive(struct ctdb_context *ctdb,
 653                             struct ctdb_req_header *hdr);
 654
 655 /* from server/ctdb_lock.c */
 656
 657 struct lock_request;
 658
 659 typedef int (*ctdb_db_handler_t)(struct ctdb_db_context *ctdb_db,
 660                                  void *private_data);
 661
 662 int ctdb_db_iterator(struct ctdb_context *ctdb, ctdb_db_handler_t handler,
 663                      void *private_data);
 664
 665 int ctdb_lockdb_mark(struct ctdb_db_context *ctdb_db);
 666
 667 int ctdb_lockdb_unmark(struct ctdb_db_context *ctdb_db);
 668
 669 struct lock_request *ctdb_lock_record(TALLOC_CTX *mem_ctx,
 670                                       struct ctdb_db_context *ctdb_db,
 671                                       TDB_DATA key,
 672                                       bool auto_mark,
 673                                       void (*callback)(void *, bool),
 674                                       void *private_data);
 675
 676 struct lock_request *ctdb_lock_db(TALLOC_CTX *mem_ctx,
 677                                   struct ctdb_db_context *ctdb_db,
 678                                   bool auto_mark,
 679                                   void (*callback)(void *, bool),
 680                                   void *private_data);
 681
 682 /* from ctdb_logging.c */
 683
 684 bool ctdb_logging_init(TALLOC_CTX *mem_ctx, const char *logging,
 685                        const char *debug_level);
 686
 687 int ctdb_set_child_logging(struct ctdb_context *ctdb);
 688
 689 /* from ctdb_logging_file.c */
 690
 691 void ctdb_log_init_file(void);
 692
 693 /* from ctdb_logging_syslog.c */
 694
 695 void ctdb_log_init_syslog(void);
 696
 697 /* from ctdb_ltdb_server.c */
 698
 699 int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db,
 700                            TDB_DATA key, struct ctdb_req_header *hdr,
 701                            void (*recv_pkt)(void *, struct ctdb_req_header *),
 702                            void *recv_context, bool ignore_generation);
 703
 704 int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db,
 705                                  TDB_DATA key, struct ctdb_ltdb_header *header,
 706                                  struct ctdb_req_header *hdr, TDB_DATA *data,
 707                                  void (*recv_pkt)(void *, struct ctdb_req_header *),
 708                                  void *recv_context, bool ignore_generation);
 709
 710 int ctdb_load_persistent_health(struct ctdb_context *ctdb,
 711                                 struct ctdb_db_context *ctdb_db);
 712 int ctdb_update_persistent_health(struct ctdb_context *ctdb,
 713                                   struct ctdb_db_context *ctdb_db,
 714                                   const char *reason,/* NULL means healthy */
 715                                   unsigned int num_healthy_nodes);
 716 int ctdb_recheck_persistent_health(struct ctdb_context *ctdb);
 717
 718 int32_t ctdb_control_db_set_healthy(struct ctdb_context *ctdb,
 719                                     TDB_DATA indata);
 720 int32_t ctdb_control_db_get_health(struct ctdb_context *ctdb,
 721                                    TDB_DATA indata, TDB_DATA *outdata);
 722
 723 int ctdb_set_db_readonly(struct ctdb_context *ctdb,
 724                          struct ctdb_db_context *ctdb_db);
 725
 726 int ctdb_process_deferred_attach(struct ctdb_context *ctdb);
 727
 728 int32_t ctdb_control_db_attach(struct ctdb_context *ctdb,
 729                                TDB_DATA indata,
 730                                TDB_DATA *outdata,
 731                                uint8_t db_flags,
 732                                uint32_t srcnode,
 733                                uint32_t client_id,
 734                                struct ctdb_req_control_old *c,
 735                                bool *async_reply);
 736 int32_t ctdb_control_db_detach(struct ctdb_context *ctdb, TDB_DATA indata,
 737                                uint32_t client_id);
 738
 739 int ctdb_attach_databases(struct ctdb_context *ctdb);
 740
 741 int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id,
 742                                 uint32_t srcnode);
 743 int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id);
 744
 745 int ctdb_set_db_sticky(struct ctdb_context *ctdb,
 746                        struct ctdb_db_context *ctdb_db);
 747
 748 void ctdb_db_statistics_reset(struct ctdb_db_context *ctdb_db);
 749
 750 int32_t ctdb_control_get_db_statistics(struct ctdb_context *ctdb,
 751                                        uint32_t db_id, TDB_DATA *outdata);
 752
 753 /* from ctdb_monitor.c */
 754
 755 void ctdb_run_notification_script(struct ctdb_context *ctdb, const char *event);
 756
 757 void ctdb_stop_monitoring(struct ctdb_context *ctdb);
 758
 759 void ctdb_wait_for_first_recovery(struct ctdb_context *ctdb);
 760
 761 int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata);
 762
 763 /* from ctdb_persistent.c */
 764
 765 void ctdb_persistent_finish_trans3_commits(struct ctdb_context *ctdb);
 766
 767 int32_t ctdb_control_trans3_commit(struct ctdb_context *ctdb,
 768                                    struct ctdb_req_control_old *c,
 769                                    TDB_DATA recdata, bool *async_reply);
 770
 771 int32_t ctdb_control_start_persistent_update(struct ctdb_context *ctdb,
 772                                              struct ctdb_req_control_old *c,
 773                                              TDB_DATA recdata);
 774 int32_t ctdb_control_cancel_persistent_update(struct ctdb_context *ctdb,
 775                                               struct ctdb_req_control_old *c,
 776                                               TDB_DATA recdata);
 777
 778 int32_t ctdb_control_get_db_seqnum(struct ctdb_context *ctdb,
 779                                    TDB_DATA indata, TDB_DATA *outdata);
 780
 781 /* from ctdb_recover.c */
 782
 783 int ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 784                            TDB_DATA indata, TDB_DATA *outdata);
 785 int ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
 786                            TDB_DATA indata, TDB_DATA *outdata);
 787
 788 int ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode,
 789                           TDB_DATA indata, TDB_DATA *outdata);
 790 int ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode,
 791                             TDB_DATA indata, TDB_DATA *outdata);
 792
 793 int ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode);
 794
 795 int32_t ctdb_control_db_pull(struct ctdb_context *ctdb,
 796                              struct ctdb_req_control_old *c,
 797                              TDB_DATA indata, TDB_DATA *outdata);
 798 int32_t ctdb_control_db_push_start(struct ctdb_context *ctdb,
 799                                    TDB_DATA indata);
 800 int32_t ctdb_control_db_push_confirm(struct ctdb_context *ctdb,
 801                                      TDB_DATA indata, TDB_DATA *outdata);
 802
 803 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb);
 804
 805 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
 806                                  struct ctdb_req_control_old *c,
 807                                  TDB_DATA indata, bool *async_reply,
 808                                  const char **errormsg);
 809
 810 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
 811                                  struct ctdb_req_control_old *c,
 812                                  bool *async_reply);
 813 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
 814                                  struct ctdb_req_control_old *c,
 815                                  bool *async_reply);
 816
 817 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb,
 818                                         TDB_DATA indata, TDB_DATA *outdata);
 819
 820 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb,
 821                                       TDB_DATA *outdata);
 822
 823 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb);
 824
 825 void ctdb_node_become_inactive(struct ctdb_context *ctdb);
 826
 827 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb);
 828 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb);
 829
 830 /* from ctdb_recoverd.c */
 831
 832 int ctdb_start_recoverd(struct ctdb_context *ctdb);
 833 void ctdb_stop_recoverd(struct ctdb_context *ctdb);
 834
 835 /* from ctdb_server.c */
 836
 837 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
 838
 839 struct ctdb_node *ctdb_ip_to_node(struct ctdb_context *ctdb,
 840                                   const ctdb_sock_addr *nodeip);
 841 uint32_t ctdb_ip_to_pnn(struct ctdb_context *ctdb,
 842                         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 bool ctdb_tunables_load(struct ctdb_context *ctdb);
 966
 967 /* from ctdb_tunnel.c */
 968
 969 int32_t ctdb_control_tunnel_register(struct ctdb_context *ctdb,
 970                                      uint32_t client_id, uint64_t tunnel_id);
 971 int32_t ctdb_control_tunnel_deregister(struct ctdb_context *ctdb,
 972                                        uint32_t client_id, uint64_t tunnel_id);
 973
 974 int ctdb_daemon_send_tunnel(struct ctdb_context *ctdb, uint32_t destnode,
 975                             uint64_t tunnel_id, uint32_t client_id,
 976                             TDB_DATA data);
 977
 978 void ctdb_request_tunnel(struct ctdb_context *ctdb,
 979                          struct ctdb_req_header *hdr);
 980
 981 /* from ctdb_update_record.c */
 982
 983 int32_t ctdb_control_update_record(struct ctdb_context *ctdb,
 984                                    struct ctdb_req_control_old *c,
 985                                    TDB_DATA recdata, bool *async_reply);
 986
 987 /* from ctdb_uptime.c */
 988
 989 int32_t ctdb_control_uptime(struct ctdb_context *ctdb, TDB_DATA *outdata);
 990
 991 /* from ctdb_vacuum.c */
 992
 993 int32_t ctdb_control_db_vacuum(struct ctdb_context *ctdb,
 994                                struct ctdb_req_control_old *c,
 995                                TDB_DATA indata,
 996                                bool *async_reply);
 997
 998 void ctdb_stop_vacuuming(struct ctdb_context *ctdb);
 999 int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db);
1000
1001 int32_t ctdb_control_schedule_for_deletion(struct ctdb_context *ctdb,
1002                                            TDB_DATA indata);
1003 int32_t ctdb_local_schedule_for_deletion(struct ctdb_db_context *ctdb_db,
1004                                          const struct ctdb_ltdb_header *hdr,
1005                                          TDB_DATA key);
1006
1007 void ctdb_local_remove_from_delete_queue(struct ctdb_db_context *ctdb_db,
1008                                          const struct ctdb_ltdb_header *hdr,
1009                                          const TDB_DATA key);
1010
1011 int32_t ctdb_control_vacuum_fetch(struct ctdb_context *ctdb, TDB_DATA indata);
1012
1013 /* from eventscript.c */
1014
1015 int ctdb_start_eventd(struct ctdb_context *ctdb);
1016 void ctdb_stop_eventd(struct ctdb_context *ctdb);
1017
1018 int ctdb_event_script_callback(struct ctdb_context *ctdb,
1019                                TALLOC_CTX *mem_ctx,
1020                                void (*callback)(struct ctdb_context *,
1021                                                 int, void *),
1022                                void *private_data,
1023                                enum ctdb_event call,
1024                                const char *fmt, ...) PRINTF_ATTRIBUTE(6,7);
1025
1026 int ctdb_event_script_args(struct ctdb_context *ctdb,
1027                            enum ctdb_event call,
1028                            const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
1029
1030 int ctdb_event_script(struct ctdb_context *ctdb,
1031                       enum ctdb_event call);
1032
1033 void ctdb_event_reopen_logs(struct ctdb_context *ctdb);
1034
1035 #endif