ctdb/include/ctdb_private.h

   1 /*
   2    ctdb database library
   3
   4    Copyright (C) Andrew Tridgell  2006
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef _CTDB_PRIVATE_H
  21 #define _CTDB_PRIVATE_H
  22
  23 #include "ctdb_client.h"
  24 #include <sys/socket.h>
  25
  26 /*
  27  * Structures to support SRVID requests and replies
  28  */
  29 struct srvid_request {
  30         uint32_t pnn;
  31         uint64_t srvid;
  32 };
  33
  34 struct srvid_request_data {
  35         uint32_t pnn;
  36         uint64_t srvid;
  37         uint32_t data;
  38 };
  39
  40 /*
  41   a tcp connection description
  42   also used by tcp_add and tcp_remove controls
  43  */
  44 struct ctdb_tcp_connection {
  45         ctdb_sock_addr src_addr;
  46         ctdb_sock_addr dst_addr;
  47 };
  48
  49 /* the wire representation for a tcp tickle array */
  50 struct ctdb_tcp_wire_array {
  51         uint32_t num;
  52         struct ctdb_tcp_connection connections[1];
  53 };
  54
  55 /* the list of tcp tickles used by get/set tcp tickle list */
  56 struct ctdb_control_tcp_tickle_list {
  57         ctdb_sock_addr addr;
  58         struct ctdb_tcp_wire_array tickles;
  59 };
  60
  61 /*
  62   array of tcp connections
  63  */
  64 struct ctdb_tcp_array {
  65         uint32_t num;
  66         struct ctdb_tcp_connection *connections;
  67 };
  68
  69
  70 /* all tunable variables go in here */
  71 struct ctdb_tunable {
  72         uint32_t max_redirect_count;
  73         uint32_t seqnum_interval; /* unit is ms */
  74         uint32_t control_timeout;
  75         uint32_t traverse_timeout;
  76         uint32_t keepalive_interval;
  77         uint32_t keepalive_limit;
  78         uint32_t recover_timeout;
  79         uint32_t recover_interval;
  80         uint32_t election_timeout;
  81         uint32_t takeover_timeout;
  82         uint32_t monitor_interval;
  83         uint32_t tickle_update_interval;
  84         uint32_t script_timeout;
  85         uint32_t script_timeout_count; /* allow dodgy scripts to hang this many times in a row before we mark the node unhealthy */
  86         uint32_t script_unhealthy_on_timeout; /* obsolete */
  87         uint32_t recovery_grace_period;
  88         uint32_t recovery_ban_period;
  89         uint32_t database_hash_size;
  90         uint32_t database_max_dead;
  91         uint32_t rerecovery_timeout;
  92         uint32_t enable_bans;
  93         uint32_t deterministic_public_ips;
  94         uint32_t reclock_ping_period;
  95         uint32_t no_ip_failback;
  96         uint32_t disable_ip_failover;
  97         uint32_t verbose_memory_names;
  98         uint32_t recd_ping_timeout;
  99         uint32_t recd_ping_failcount;
 100         uint32_t log_latency_ms;
 101         uint32_t reclock_latency_ms;
 102         uint32_t recovery_drop_all_ips;
 103         uint32_t verify_recovery_lock;
 104         uint32_t vacuum_interval;
 105         uint32_t vacuum_max_run_time;
 106         uint32_t repack_limit;
 107         uint32_t vacuum_limit;
 108         uint32_t max_queue_depth_drop_msg;
 109         uint32_t allow_unhealthy_db_read;
 110         uint32_t stat_history_interval;
 111         uint32_t deferred_attach_timeout;
 112         uint32_t vacuum_fast_path_count;
 113         uint32_t lcp2_public_ip_assignment;
 114         uint32_t allow_client_db_attach;
 115         uint32_t recover_pdb_by_seqnum;
 116         uint32_t deferred_rebalance_on_node_add;
 117         uint32_t fetch_collapse;
 118         uint32_t hopcount_make_sticky;
 119         uint32_t sticky_duration;
 120         uint32_t sticky_pindown;
 121         uint32_t no_ip_takeover;
 122         uint32_t db_record_count_warn;
 123         uint32_t db_record_size_warn;
 124         uint32_t db_size_warn;
 125         uint32_t pulldb_preallocation_size;
 126         uint32_t no_ip_host_on_all_disabled;
 127         uint32_t samba3_hack;
 128         uint32_t mutex_enabled;
 129         uint32_t lock_processes_per_db;
 130 };
 131
 132 /*
 133   an installed ctdb remote call
 134 */
 135 struct ctdb_registered_call {
 136         struct ctdb_registered_call *next, *prev;
 137         uint32_t id;
 138         ctdb_fn_t fn;
 139 };
 140
 141 /*
 142   check that a pnn is valid
 143  */
 144 #define ctdb_validate_pnn(ctdb, pnn) (((uint32_t)(pnn)) < (ctdb)->num_nodes)
 145
 146
 147 /* called from the queue code when a packet comes in. Called with data==NULL
 148    on error */
 149 typedef void (*ctdb_queue_cb_fn_t)(uint8_t *data, size_t length,
 150                                    void *private_data);
 151
 152 /* used for callbacks in ctdb_control requests */
 153 typedef void (*ctdb_control_callback_fn_t)(struct ctdb_context *,
 154                                            int32_t status, TDB_DATA data,
 155                                            const char *errormsg,
 156                                            void *private_data);
 157 /*
 158   structure describing a connected client in the daemon
 159  */
 160 struct ctdb_client {
 161         struct ctdb_context *ctdb;
 162         int fd;
 163         struct ctdb_queue *queue;
 164         uint32_t client_id;
 165         pid_t pid;
 166         struct ctdb_tcp_list *tcp_list;
 167         uint32_t db_id;
 168         uint32_t num_persistent_updates;
 169         struct ctdb_client_notify_list *notify;
 170 };
 171
 172 struct ctdb_iface;
 173
 174 /* state associated with a public ip address */
 175 struct ctdb_vnn {
 176         struct ctdb_vnn *prev, *next;
 177
 178         struct ctdb_iface *iface;
 179         const char **ifaces;
 180         ctdb_sock_addr public_address;
 181         uint8_t public_netmask_bits;
 182
 183         /* the node number that is serving this public address, if any.
 184            If no node serves this ip it is set to -1 */
 185         int32_t pnn;
 186
 187         /* List of clients to tickle for this public address */
 188         struct ctdb_tcp_array *tcp_array;
 189
 190         /* whether we need to update the other nodes with changes to our list
 191            of connected clients */
 192         bool tcp_update_needed;
 193
 194         /* a context to hang sending gratious arp events off */
 195         TALLOC_CTX *takeover_ctx;
 196
 197         struct ctdb_kill_tcp *killtcp;
 198
 199         /* Set to true any time an update to this VNN is in flight.
 200            This helps to avoid races. */
 201         bool update_in_flight;
 202
 203         /* If CTDB_CONTROL_DEL_PUBLIC_IP is received for this IP
 204          * address then this flag is set.  It will be deleted in the
 205          * release IP callback. */
 206         bool delete_pending;
 207 };
 208
 209 /*
 210   state associated with one node
 211 */
 212 struct ctdb_node {
 213         struct ctdb_context *ctdb;
 214         ctdb_sock_addr address;
 215         const char *name; /* for debug messages */
 216         void *private_data; /* private to transport */
 217         uint32_t pnn;
 218         uint32_t flags;
 219
 220         /* used by the dead node monitoring */
 221         uint32_t dead_count;
 222         uint32_t rx_cnt;
 223         uint32_t tx_cnt;
 224
 225         /* a list of controls pending to this node, so we can time them out quickly
 226            if the node becomes disconnected */
 227         struct daemon_control_state *pending_controls;
 228
 229         /* used by the recovery daemon when distributing ip addresses
 230            across the nodes.  it needs to know which public ip's can be handled
 231            by each node.
 232         */
 233         struct ctdb_all_public_ips *known_public_ips;
 234         struct ctdb_all_public_ips *available_public_ips;
 235         /* used by the recovery dameon to track when a node should be banned */
 236         struct ctdb_banning_state *ban_state;
 237 };
 238
 239 /*
 240   transport specific methods
 241 */
 242 struct ctdb_methods {
 243         int (*initialise)(struct ctdb_context *); /* initialise transport structures */
 244         int (*start)(struct ctdb_context *); /* start the transport */
 245         int (*add_node)(struct ctdb_node *); /* setup a new node */
 246         int (*connect_node)(struct ctdb_node *); /* connect to node */
 247         int (*queue_pkt)(struct ctdb_node *, uint8_t *data, uint32_t length);
 248         void *(*allocate_pkt)(TALLOC_CTX *mem_ctx, size_t );
 249         void (*shutdown)(struct ctdb_context *); /* shutdown transport */
 250         void (*restart)(struct ctdb_node *); /* stop and restart the connection */
 251 };
 252
 253 /*
 254   transport calls up to the ctdb layer
 255 */
 256 struct ctdb_upcalls {
 257         /* recv_pkt is called when a packet comes in */
 258         void (*recv_pkt)(struct ctdb_context *, uint8_t *data, uint32_t length);
 259
 260         /* node_dead is called when an attempt to send to a node fails */
 261         void (*node_dead)(struct ctdb_node *);
 262
 263         /* node_connected is called when a connection to a node is established */
 264         void (*node_connected)(struct ctdb_node *);
 265 };
 266
 267 /* additional data required for the daemon mode */
 268 struct ctdb_daemon_data {
 269         int sd;
 270         char *name;
 271         struct ctdb_queue *queue;
 272 };
 273
 274
 275 #define CTDB_UPDATE_STAT(ctdb, counter, value) \
 276         {                                                                               \
 277                 if (value > ctdb->statistics.counter) {                                 \
 278                         ctdb->statistics.counter = c->hopcount;                         \
 279                 }                                                                       \
 280                 if (value > ctdb->statistics_current.counter) {                         \
 281                         ctdb->statistics_current.counter = c->hopcount;                 \
 282                 }                                                                       \
 283         }
 284
 285 #define CTDB_INCREMENT_STAT(ctdb, counter) \
 286         {                                                                               \
 287                 ctdb->statistics.counter++;                                             \
 288                 ctdb->statistics_current.counter++;                                     \
 289         }
 290
 291 #define CTDB_DECREMENT_STAT(ctdb, counter) \
 292         {                                                                               \
 293                 if (ctdb->statistics.counter > 0)                                       \
 294                         ctdb->statistics.counter--;                                     \
 295                 if (ctdb->statistics_current.counter > 0)                               \
 296                         ctdb->statistics_current.counter--;                             \
 297         }
 298
 299 #define CTDB_INCREMENT_DB_STAT(ctdb_db, counter) \
 300         {                                                                               \
 301                 ctdb_db->statistics.counter++;                                          \
 302         }
 303
 304 #define CTDB_DECREMENT_DB_STAT(ctdb_db, counter) \
 305         {                                                                               \
 306                 if (ctdb_db->statistics.counter > 0)                                    \
 307                         ctdb_db->statistics.counter--;                                  \
 308         }
 309
 310 #define CTDB_UPDATE_RECLOCK_LATENCY(ctdb, name, counter, value) \
 311         {                                                                               \
 312                 if (value > ctdb->statistics.counter.max)                               \
 313                         ctdb->statistics.counter.max = value;                           \
 314                 if (value > ctdb->statistics_current.counter.max)                       \
 315                         ctdb->statistics_current.counter.max = value;                   \
 316                                                                                         \
 317                 if (ctdb->statistics.counter.num == 0 ||                                \
 318                     value < ctdb->statistics.counter.min)                               \
 319                         ctdb->statistics.counter.min = value;                           \
 320                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 321                     value < ctdb->statistics_current.counter.min)                       \
 322                         ctdb->statistics_current.counter.min = value;                   \
 323                                                                                         \
 324                 ctdb->statistics.counter.total += value;                                \
 325                 ctdb->statistics_current.counter.total += value;                        \
 326                                                                                         \
 327                 ctdb->statistics.counter.num++;                                         \
 328                 ctdb->statistics_current.counter.num++;                                 \
 329                                                                                         \
 330                 if (ctdb->tunable.reclock_latency_ms != 0) {                            \
 331                         if (value*1000 > ctdb->tunable.reclock_latency_ms) {            \
 332                                 DEBUG(DEBUG_ERR,                                        \
 333                                       ("High RECLOCK latency %fs for operation %s\n",   \
 334                                        value, name));                                   \
 335                         }                                                               \
 336                 }                                                                       \
 337         }
 338
 339 #define CTDB_UPDATE_DB_LATENCY(ctdb_db, operation, counter, value)                      \
 340         {                                                                               \
 341                 if (value > ctdb_db->statistics.counter.max)                            \
 342                         ctdb_db->statistics.counter.max = value;                        \
 343                 if (ctdb_db->statistics.counter.num == 0 ||                             \
 344                     value < ctdb_db->statistics.counter.min)                            \
 345                         ctdb_db->statistics.counter.min = value;                        \
 346                                                                                         \
 347                 ctdb_db->statistics.counter.total += value;                             \
 348                 ctdb_db->statistics.counter.num++;                                      \
 349                                                                                         \
 350                 if (ctdb_db->ctdb->tunable.log_latency_ms != 0) {                       \
 351                         if (value*1000 > ctdb_db->ctdb->tunable.log_latency_ms) {       \
 352                                 DEBUG(DEBUG_ERR,                                        \
 353                                       ("High latency %.6fs for operation %s on database %s\n",\
 354                                        value, operation, ctdb_db->db_name));            \
 355                         }                                                               \
 356                 }                                                                       \
 357         }
 358
 359 #define CTDB_UPDATE_LATENCY(ctdb, db, operation, counter, t) \
 360         {                                                                               \
 361                 double l = timeval_elapsed(&t);                                         \
 362                                                                                         \
 363                 if (l > ctdb->statistics.counter.max)                                   \
 364                         ctdb->statistics.counter.max = l;                               \
 365                 if (l > ctdb->statistics_current.counter.max)                           \
 366                         ctdb->statistics_current.counter.max = l;                       \
 367                                                                                         \
 368                 if (ctdb->statistics.counter.num == 0 ||                                \
 369                     l < ctdb->statistics.counter.min)                                   \
 370                         ctdb->statistics.counter.min = l;                               \
 371                 if (ctdb->statistics_current.counter.num == 0 ||                        \
 372                     l < ctdb->statistics_current.counter.min)                           \
 373                         ctdb->statistics_current.counter.min = l;                       \
 374                                                                                         \
 375                 ctdb->statistics.counter.total += l;                                    \
 376                 ctdb->statistics_current.counter.total += l;                            \
 377                                                                                         \
 378                 ctdb->statistics.counter.num++;                                         \
 379                 ctdb->statistics_current.counter.num++;                                 \
 380                                                                                         \
 381                 if (ctdb->tunable.log_latency_ms != 0) {                                \
 382                         if (l*1000 > ctdb->tunable.log_latency_ms) {                    \
 383                                 DEBUG(DEBUG_WARNING,                                    \
 384                                       ("High latency %.6fs for operation %s on database %s\n",\
 385                                        l, operation, db->db_name));                     \
 386                         }                                                               \
 387                 }                                                                       \
 388         }
 389
 390
 391
 392 /* a structure that contains the elements required for the write record
 393    control
 394 */
 395 struct ctdb_write_record {
 396         uint32_t dbid;
 397         uint32_t keylen;
 398         uint32_t datalen;
 399         unsigned char blob[1];
 400 };
 401
 402 enum ctdb_freeze_mode {CTDB_FREEZE_NONE, CTDB_FREEZE_PENDING, CTDB_FREEZE_FROZEN};
 403
 404 enum ctdb_runstate {
 405         CTDB_RUNSTATE_UNKNOWN,
 406         CTDB_RUNSTATE_INIT,
 407         CTDB_RUNSTATE_SETUP,
 408         CTDB_RUNSTATE_FIRST_RECOVERY,
 409         CTDB_RUNSTATE_STARTUP,
 410         CTDB_RUNSTATE_RUNNING,
 411         CTDB_RUNSTATE_SHUTDOWN,
 412 };
 413
 414 #define CTDB_MONITORING_ACTIVE          0
 415 #define CTDB_MONITORING_DISABLED        1
 416
 417 #define NUM_DB_PRIORITIES 3
 418 /* main state of the ctdb daemon */
 419 struct ctdb_context {
 420         struct tevent_context *ev;
 421         struct timeval ctdbd_start_time;
 422         struct timeval last_recovery_started;
 423         struct timeval last_recovery_finished;
 424         uint32_t recovery_mode;
 425         TALLOC_CTX *tickle_update_context;
 426         TALLOC_CTX *keepalive_ctx;
 427         TALLOC_CTX *check_public_ifaces_ctx;
 428         struct ctdb_tunable tunable;
 429         enum ctdb_freeze_mode freeze_mode[NUM_DB_PRIORITIES+1];
 430         struct ctdb_freeze_handle *freeze_handles[NUM_DB_PRIORITIES+1];
 431         bool freeze_transaction_started;
 432         uint32_t freeze_transaction_id;
 433         ctdb_sock_addr *address;
 434         const char *name;
 435         const char *db_directory;
 436         const char *db_directory_persistent;
 437         const char *db_directory_state;
 438         struct tdb_wrap *db_persistent_health;
 439         uint32_t db_persistent_startup_generation;
 440         uint64_t db_persistent_check_errors;
 441         uint64_t max_persistent_check_errors;
 442         const char *transport;
 443         char *recovery_lock_file;
 444         int recovery_lock_fd;
 445         uint32_t pnn; /* our own pnn */
 446         uint32_t num_nodes;
 447         uint32_t num_connected;
 448         unsigned flags;
 449         uint32_t capabilities;
 450         struct reqid_context *idr;
 451         struct ctdb_node **nodes; /* array of nodes in the cluster - indexed by vnn */
 452         struct ctdb_vnn *vnn; /* list of public ip addresses and interfaces */
 453         struct ctdb_vnn *single_ip_vnn; /* a structure for the single ip */
 454         struct ctdb_iface *ifaces; /* list of local interfaces */
 455         char *err_msg;
 456         const struct ctdb_methods *methods; /* transport methods */
 457         const struct ctdb_upcalls *upcalls; /* transport upcalls */
 458         void *private_data; /* private to transport */
 459         struct ctdb_db_context *db_list;
 460         struct srvid_context *srv;
 461         struct ctdb_daemon_data daemon;
 462         struct ctdb_statistics statistics;
 463         struct ctdb_statistics statistics_current;
 464 #define MAX_STAT_HISTORY 100
 465         struct ctdb_statistics statistics_history[MAX_STAT_HISTORY];
 466         struct ctdb_vnn_map *vnn_map;
 467         uint32_t num_clients;
 468         uint32_t recovery_master;
 469         struct ctdb_client_ip *client_ip_list;
 470         bool do_checkpublicip;
 471         struct trbt_tree *server_ids;
 472         bool do_setsched;
 473         const char *event_script_dir;
 474         const char *notification_script;
 475         const char *default_public_interface;
 476         pid_t ctdbd_pid;
 477         pid_t recoverd_pid;
 478         enum ctdb_runstate runstate;
 479         struct ctdb_monitor_state *monitor;
 480         int start_as_disabled;
 481         int start_as_stopped;
 482         bool valgrinding;
 483         uint32_t event_script_timeouts; /* counting how many consecutive times an eventscript has timedout */
 484         uint32_t *recd_ping_count;
 485         TALLOC_CTX *recd_ctx; /* a context used to track recoverd monitoring events */
 486         TALLOC_CTX *release_ips_ctx; /* a context used to automatically drop all IPs if we fail to recover the node */
 487
 488         TALLOC_CTX *event_script_ctx;
 489         int active_events;
 490
 491         struct ctdb_event_script_state *current_monitor;
 492         struct ctdb_scripts_wire *last_status[CTDB_EVENT_MAX];
 493
 494         TALLOC_CTX *banning_ctx;
 495
 496         struct ctdb_vacuum_child_context *vacuumers;
 497
 498         /* mapping from pid to ctdb_client * */
 499         struct ctdb_client_pid_list *client_pids;
 500
 501         /* used in the recovery daemon to remember the ip allocation */
 502         struct trbt_tree *ip_tree;
 503
 504         /* Used to defer db attach requests while in recovery mode */
 505         struct ctdb_deferred_attach_context *deferred_attach;
 506
 507         /* if we are a child process, do we have a domain socket to send controls on */
 508         bool can_send_controls;
 509
 510         /* list of event script callback functions that are active */
 511         struct event_script_callback *script_callbacks;
 512
 513         struct ctdb_reloadips_handle *reload_ips;
 514
 515         const char *nodes_file;
 516         const char *public_addresses_file;
 517         struct trbt_tree *child_processes;
 518
 519         /* Used for locking record/db/alldb */
 520         struct lock_context *lock_current;
 521         struct lock_context *lock_pending;
 522 };
 523
 524 struct ctdb_db_context {
 525         struct ctdb_db_context *next, *prev;
 526         struct ctdb_context *ctdb;
 527         uint32_t db_id;
 528         uint32_t priority;
 529         bool persistent;
 530         bool readonly; /* Do we support read-only delegations ? */
 531         bool sticky; /* Do we support sticky records ? */
 532         const char *db_name;
 533         const char *db_path;
 534         struct tdb_wrap *ltdb;
 535         struct tdb_context *rottdb; /* ReadOnly tracking TDB */
 536         struct ctdb_registered_call *calls; /* list of registered calls */
 537         uint32_t seqnum;
 538         struct tevent_timer *seqnum_update;
 539         struct ctdb_traverse_local_handle *traverse;
 540         struct ctdb_vacuum_handle *vacuum_handle;
 541         char *unhealthy_reason;
 542         int pending_requests;
 543         struct revokechild_handle *revokechild_active;
 544         struct ctdb_persistent_state *persistent_state;
 545         struct trbt_tree *delete_queue;
 546         struct trbt_tree *sticky_records;
 547         int (*ctdb_ltdb_store_fn)(struct ctdb_db_context *ctdb_db,
 548                                   TDB_DATA key,
 549                                   struct ctdb_ltdb_header *header,
 550                                   TDB_DATA data);
 551
 552         /* used to track which records we are currently fetching
 553            so we can avoid sending duplicate fetch requests
 554         */
 555         struct trbt_tree *deferred_fetch;
 556         struct trbt_tree *defer_dmaster;
 557
 558         struct ctdb_db_statistics statistics;
 559
 560         struct lock_context *lock_current;
 561         struct lock_context *lock_pending;
 562         int lock_num_current;
 563
 564         struct ctdb_call_state *pending_calls;
 565
 566         enum ctdb_freeze_mode freeze_mode;
 567         struct ctdb_db_freeze_handle *freeze_handle;
 568         bool freeze_transaction_started;
 569         uint32_t freeze_transaction_id;
 570         uint32_t generation;
 571 };
 572
 573
 574 #define CTDB_NO_MEMORY(ctdb, p) do { if (!(p)) { \
 575           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 576           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 577           return -1; }} while (0)
 578
 579 #define CTDB_NO_MEMORY_VOID(ctdb, p) do { if (!(p)) { \
 580           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 581           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 582           return; }} while (0)
 583
 584 #define CTDB_NO_MEMORY_NULL(ctdb, p) do { if (!(p)) { \
 585           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 586           ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \
 587           return NULL; }} while (0)
 588
 589 #define CTDB_NO_MEMORY_FATAL(ctdb, p) do { if (!(p)) { \
 590           DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \
 591           ctdb_fatal(ctdb, "Out of memory in " __location__ ); \
 592           }} while (0)
 593
 594 /*
 595   struct holding a ctdb_sock_addr and an interface name,
 596   used to add/remove public addresses
 597  */
 598 struct ctdb_control_ip_iface {
 599         ctdb_sock_addr addr;
 600         uint32_t mask;
 601         uint32_t len;
 602         char iface[1];
 603 };
 604
 605 /*
 606   struct holding a ctdb_sock_addr and an interface name,
 607   used for send_gratious_arp
 608  */
 609 struct ctdb_control_gratious_arp {
 610         ctdb_sock_addr addr;
 611         uint32_t mask;
 612         uint32_t len;
 613         char iface[1];
 614 };
 615
 616 /*
 617   persistent store control - update this record on all other nodes
 618  */
 619 struct ctdb_control_persistent_store {
 620         uint32_t db_id;
 621         uint32_t len;
 622         uint8_t  data[1];
 623 };
 624
 625 /*
 626   structure used for CTDB_SRVID_NODE_FLAGS_CHANGED
 627  */
 628 struct ctdb_node_flag_change {
 629         uint32_t pnn;
 630         uint32_t new_flags;
 631         uint32_t old_flags;
 632 };
 633
 634 /*
 635   struct for admin setting a ban
 636  */
 637 struct ctdb_ban_info {
 638         uint32_t pnn;
 639         uint32_t ban_time;
 640 };
 641
 642 enum call_state {CTDB_CALL_WAIT, CTDB_CALL_DONE, CTDB_CALL_ERROR};
 643
 644 #define CTDB_LMASTER_ANY        0xffffffff
 645
 646 /*
 647   state of a in-progress ctdb call
 648 */
 649 struct ctdb_call_state {
 650         struct ctdb_call_state *next, *prev;
 651         enum call_state state;
 652         uint32_t reqid;
 653         struct ctdb_req_call *c;
 654         struct ctdb_db_context *ctdb_db;
 655         const char *errmsg;
 656         struct ctdb_call *call;
 657         uint32_t generation;
 658         struct {
 659                 void (*fn)(struct ctdb_call_state *);
 660                 void *private_data;
 661         } async;
 662 };
 663
 664
 665 /* used for fetch_lock */
 666 struct ctdb_fetch_handle {
 667         struct ctdb_db_context *ctdb_db;
 668         TDB_DATA key;
 669         TDB_DATA *data;
 670         struct ctdb_ltdb_header header;
 671 };
 672
 673 /* internal prototypes */
 674
 675 void ctdb_request_message(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 676
 677 /*
 678   allocate a packet for use in client<->daemon communication
 679  */
 680 struct ctdb_req_header *_ctdbd_allocate_pkt(struct ctdb_context *ctdb,
 681                                             TALLOC_CTX *mem_ctx,
 682                                             enum ctdb_operation operation,
 683                                             size_t length, size_t slength,
 684                                             const char *type);
 685 #define ctdbd_allocate_pkt(ctdb, mem_ctx, operation, length, type) \
 686         (type *)_ctdbd_allocate_pkt(ctdb, mem_ctx, operation, length, sizeof(type), #type)
 687
 688 int ctdb_client_send_message(struct ctdb_context *ctdb, uint32_t vnn,
 689                              uint64_t srvid, TDB_DATA data);
 690
 691 int ctdb_call_local(struct ctdb_db_context *ctdb_db, struct ctdb_call *call,
 692                     struct ctdb_ltdb_header *header, TALLOC_CTX *mem_ctx,
 693                     TDB_DATA *data, bool updatetdb);
 694
 695 #define ctdb_reqid_find(ctdb, reqid, type)      (type *)_ctdb_reqid_find(ctdb, reqid, #type, __location__)
 696
 697 int ctdb_socket_connect(struct ctdb_context *ctdb);
 698 void ctdb_client_read_cb(uint8_t *data, size_t cnt, void *args);
 699
 700 int ctdb_control(struct ctdb_context *ctdb, uint32_t destnode, uint64_t srvid,
 701                  uint32_t opcode, uint32_t flags, TDB_DATA data,
 702                  TALLOC_CTX *mem_ctx, TDB_DATA *outdata, int32_t *status,
 703                  struct timeval *timeout, char **errormsg);
 704 int ctdb_control_recv(struct ctdb_context *ctdb,
 705                 struct ctdb_client_control_state *state,
 706                 TALLOC_CTX *mem_ctx,
 707                 TDB_DATA *outdata, int32_t *status, char **errormsg);
 708
 709 struct ctdb_client_control_state *
 710 ctdb_control_send(struct ctdb_context *ctdb,
 711                 uint32_t destnode, uint64_t srvid,
 712                 uint32_t opcode, uint32_t flags, TDB_DATA data,
 713                 TALLOC_CTX *mem_ctx,
 714                 struct timeval *timeout,
 715                 char **errormsg);
 716
 717
 718
 719
 720 #define CHECK_CONTROL_DATA_SIZE(size) do { \
 721  if (indata.dsize != size) { \
 722          DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected %u\n", \
 723                   opcode, (unsigned)indata.dsize, (unsigned)size));     \
 724          return -1; \
 725  } \
 726  } while (0)
 727
 728 #define CHECK_CONTROL_MIN_DATA_SIZE(size) do { \
 729  if (indata.dsize < size) { \
 730          DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected >= %u\n", \
 731                   opcode, (unsigned)indata.dsize, (unsigned)size));     \
 732          return -1; \
 733  } \
 734  } while (0)
 735
 736 /* structure used for pulldb control */
 737 struct ctdb_control_pulldb {
 738         uint32_t db_id;
 739         uint32_t lmaster;
 740 };
 741
 742 /* structure used for sending lists of records */
 743 struct ctdb_marshall_buffer {
 744         uint32_t db_id;
 745         uint32_t count;
 746         uint8_t data[1];
 747 };
 748
 749 /*
 750   structure for setting a tunable
 751  */
 752 struct ctdb_control_set_tunable {
 753         uint32_t value;
 754         uint32_t length;
 755         uint8_t  name[1];
 756 };
 757
 758 /*
 759   structure for getting a tunable
 760  */
 761 struct ctdb_control_get_tunable {
 762         uint32_t length;
 763         uint8_t  name[1];
 764 };
 765
 766 /*
 767   structure for listing tunables
 768  */
 769 struct ctdb_control_list_tunable {
 770         uint32_t length;
 771         /* returns a : separated list of tunable names */
 772         uint8_t  data[1];
 773 };
 774
 775
 776 struct ctdb_control_transdb {
 777         uint32_t db_id;
 778         uint32_t transaction_id;
 779 };
 780
 781 /*
 782   state of a in-progress ctdb call in client
 783 */
 784 struct ctdb_client_call_state {
 785         enum call_state state;
 786         uint32_t reqid;
 787         struct ctdb_db_context *ctdb_db;
 788         struct ctdb_call *call;
 789         struct {
 790                 void (*fn)(struct ctdb_client_call_state *);
 791                 void *private_data;
 792         } async;
 793 };
 794
 795 int32_t ctdb_run_eventscripts(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA data, bool *async_reply);
 796
 797 int ctdb_ctrl_takeover_ip(struct ctdb_context *ctdb, struct timeval timeout,
 798                           uint32_t destnode, struct ctdb_public_ip *ip);
 799 int ctdb_ctrl_release_ip(struct ctdb_context *ctdb, struct timeval timeout,
 800                          uint32_t destnode, struct ctdb_public_ip *ip);
 801
 802 int ctdb_ctrl_get_public_ips(struct ctdb_context *ctdb,
 803                              struct timeval timeout,
 804                              uint32_t destnode,
 805                              TALLOC_CTX *mem_ctx,
 806                              struct ctdb_all_public_ips **ips);
 807 #define CTDB_PUBLIC_IP_FLAGS_ONLY_AVAILABLE 0x00010000
 808 int ctdb_ctrl_get_public_ips_flags(struct ctdb_context *ctdb,
 809                                    struct timeval timeout, uint32_t destnode,
 810                                    TALLOC_CTX *mem_ctx,
 811                                    uint32_t flags,
 812                                    struct ctdb_all_public_ips **ips);
 813
 814 struct ctdb_control_iface_info {
 815         char name[CTDB_IFACE_SIZE+2];
 816         uint16_t link_state;
 817         uint32_t references;
 818 };
 819
 820 struct ctdb_control_public_ip_info {
 821         struct ctdb_public_ip ip;
 822         uint32_t active_idx;
 823         uint32_t num;
 824         struct ctdb_control_iface_info ifaces[1];
 825 };
 826
 827 struct ctdb_control_get_ifaces {
 828         uint32_t num;
 829         struct ctdb_control_iface_info ifaces[1];
 830 };
 831
 832 int ctdb_ctrl_get_public_ip_info(struct ctdb_context *ctdb,
 833                                  struct timeval timeout, uint32_t destnode,
 834                                  TALLOC_CTX *mem_ctx,
 835                                  const ctdb_sock_addr *addr,
 836                                  struct ctdb_control_public_ip_info **info);
 837 int ctdb_ctrl_get_ifaces(struct ctdb_context *ctdb,
 838                          struct timeval timeout, uint32_t destnode,
 839                          TALLOC_CTX *mem_ctx,
 840                          struct ctdb_control_get_ifaces **ifaces);
 841 int ctdb_ctrl_set_iface_link(struct ctdb_context *ctdb,
 842                              struct timeval timeout, uint32_t destnode,
 843                              TALLOC_CTX *mem_ctx,
 844                              const struct ctdb_control_iface_info *info);
 845
 846 /* Details of a byte range lock */
 847 struct ctdb_lock_info {
 848         ino_t inode;
 849         off_t start, end;
 850         bool waiting;
 851         bool read_only;
 852 };
 853
 854 typedef void (*client_async_callback)(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data);
 855
 856 int ctdb_event_script(struct ctdb_context *ctdb, enum ctdb_eventscript_call call);
 857 int ctdb_event_script_args(struct ctdb_context *ctdb, enum ctdb_eventscript_call call,
 858                            const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
 859 int ctdb_event_script_callback(struct ctdb_context *ctdb,
 860                                TALLOC_CTX *mem_ctx,
 861                                void (*callback)(struct ctdb_context *, int, void *),
 862                                void *private_data,
 863                                enum ctdb_eventscript_call call,
 864                                const char *fmt, ...) PRINTF_ATTRIBUTE(6,7);
 865
 866 int ctdb_ctrl_get_all_tunables(struct ctdb_context *ctdb,
 867                                struct timeval timeout,
 868                                uint32_t destnode,
 869                                struct ctdb_tunable *tunables);
 870
 871 int ctdb_ctrl_killtcp(struct ctdb_context *ctdb,
 872                       struct timeval timeout,
 873                       uint32_t destnode,
 874                       struct ctdb_tcp_connection *killtcp);
 875
 876 int ctdb_ctrl_add_public_ip(struct ctdb_context *ctdb,
 877                       struct timeval timeout,
 878                       uint32_t destnode,
 879                       struct ctdb_control_ip_iface *pub);
 880
 881 int ctdb_ctrl_del_public_ip(struct ctdb_context *ctdb,
 882                       struct timeval timeout,
 883                       uint32_t destnode,
 884                       struct ctdb_control_ip_iface *pub);
 885
 886 int ctdb_ctrl_gratious_arp(struct ctdb_context *ctdb,
 887                       struct timeval timeout,
 888                       uint32_t destnode,
 889                       ctdb_sock_addr *addr,
 890                       const char *ifname);
 891
 892 int ctdb_ctrl_get_tcp_tickles(struct ctdb_context *ctdb,
 893                       struct timeval timeout,
 894                       uint32_t destnode,
 895                       TALLOC_CTX *mem_ctx,
 896                       ctdb_sock_addr *addr,
 897                       struct ctdb_control_tcp_tickle_list **list);
 898
 899 int32_t ctdb_control_persistent_store(struct ctdb_context *ctdb,
 900                                       struct ctdb_req_control *c,
 901                                       TDB_DATA recdata, bool *async_reply);
 902
 903 struct client_async_data {
 904         enum ctdb_controls opcode;
 905         bool dont_log_errors;
 906         uint32_t count;
 907         uint32_t fail_count;
 908         client_async_callback callback;
 909         client_async_callback fail_callback;
 910         void *callback_data;
 911 };
 912 void ctdb_client_async_add(struct client_async_data *data, struct ctdb_client_control_state *state);
 913 int ctdb_client_async_wait(struct ctdb_context *ctdb, struct client_async_data *data);
 914 int ctdb_client_async_control(struct ctdb_context *ctdb,
 915                                 enum ctdb_controls opcode,
 916                                 uint32_t *nodes,
 917                                 uint64_t srvid,
 918                                 struct timeval timeout,
 919                                 bool dont_log_errors,
 920                                 TDB_DATA data,
 921                                 client_async_callback client_callback,
 922                                 client_async_callback fail_callback,
 923                                 void *callback_data);
 924
 925 extern int script_log_level;
 926 extern bool fast_start;
 927 extern const char *ctdbd_pidfile;
 928
 929 int32_t ctdb_control_get_event_script_status(struct ctdb_context *ctdb,
 930                                              uint32_t call_type,
 931                                              TDB_DATA *outdata);
 932
 933 int ctdb_ctrl_report_recd_lock_latency(struct ctdb_context *ctdb, struct timeval timeout, double latency);
 934
 935 int32_t ctdb_control_enable_script(struct ctdb_context *ctdb, TDB_DATA indata);
 936 int32_t ctdb_control_disable_script(struct ctdb_context *ctdb, TDB_DATA indata);
 937
 938 /**
 939  * structure to pass to a schedule_for_deletion_control
 940  */
 941 struct ctdb_control_schedule_for_deletion {
 942         uint32_t db_id;
 943         struct ctdb_ltdb_header hdr;
 944         uint32_t keylen;
 945         uint8_t key[1]; /* key[] */
 946 };
 947
 948 struct ctdb_ltdb_header *ctdb_header_from_record_handle(struct ctdb_record_handle *h);
 949
 950 typedef void (*deferred_requeue_fn)(void *call_context, struct ctdb_req_header *hdr);
 951
 952 /*
 953   description for a message to reload all ips via recovery master/daemon
 954  */
 955 struct reloadips_all_reply {
 956         uint32_t pnn;
 957         uint64_t srvid;
 958 };
 959
 960 /* from tcp/ and ib/ */
 961
 962 int ctdb_tcp_init(struct ctdb_context *ctdb);
 963 int ctdb_ibw_init(struct ctdb_context *ctdb);
 964
 965 /* from ctdb_banning.c */
 966
 967 void ctdb_local_node_got_banned(struct ctdb_context *ctdb);
 968 int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata);
 969 int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata);
 970 void ctdb_ban_self(struct ctdb_context *ctdb);
 971
 972 /* from ctdb_call.c */
 973
 974 struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id);
 975
 976 void ctdb_request_dmaster(struct ctdb_context *ctdb,
 977                           struct ctdb_req_header *hdr);
 978 void ctdb_reply_dmaster(struct ctdb_context *ctdb,
 979                         struct ctdb_req_header *hdr);
 980 void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 981 void ctdb_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 982 void ctdb_reply_error(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
 983
 984 void ctdb_call_resend_db(struct ctdb_db_context *ctdb);
 985 void ctdb_call_resend_all(struct ctdb_context *ctdb);
 986
 987 struct ctdb_call_state *ctdb_call_local_send(struct ctdb_db_context *ctdb_db,
 988                                              struct ctdb_call *call,
 989                                              struct ctdb_ltdb_header *header,
 990                                              TDB_DATA *data);
 991
 992 struct ctdb_call_state *ctdb_daemon_call_send_remote(
 993                                         struct ctdb_db_context *ctdb_db,
 994                                         struct ctdb_call *call,
 995                                         struct ctdb_ltdb_header *header);
 996 int ctdb_daemon_call_recv(struct ctdb_call_state *state,
 997                           struct ctdb_call *call);
 998
 999 void ctdb_send_keepalive(struct ctdb_context *ctdb, uint32_t destnode);
1000
1001 int ctdb_start_revoke_ro_record(struct ctdb_context *ctdb,
1002                                 struct ctdb_db_context *ctdb_db,
1003                                 TDB_DATA key, struct ctdb_ltdb_header *header,
1004                                 TDB_DATA data);
1005
1006 int ctdb_add_revoke_deferred_call(struct ctdb_context *ctdb,
1007                                   struct ctdb_db_context *ctdb_db,
1008                                   TDB_DATA key, struct ctdb_req_header *hdr,
1009                                   deferred_requeue_fn fn, void *call_context);
1010
1011 /* from server/ctdb_control.c */
1012
1013 int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata);
1014
1015 void ctdb_request_control_reply(struct ctdb_context *ctdb,
1016                                 struct ctdb_req_control *c,
1017                                 TDB_DATA *outdata, int32_t status,
1018                                 const char *errormsg);
1019
1020 void ctdb_request_control(struct ctdb_context *ctdb,
1021                           struct ctdb_req_header *hdr);
1022 void ctdb_reply_control(struct ctdb_context *ctdb,
1023                         struct ctdb_req_header *hdr);
1024
1025 int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
1026                              uint64_t srvid, uint32_t opcode,
1027                              uint32_t client_id, uint32_t flags,
1028                              TDB_DATA data,
1029                              ctdb_control_callback_fn_t callback,
1030                              void *private_data);
1031
1032 /* from server/ctdb_daemon.c */
1033
1034 int daemon_register_message_handler(struct ctdb_context *ctdb,
1035                                     uint32_t client_id, uint64_t srvid);
1036 int daemon_deregister_message_handler(struct ctdb_context *ctdb,
1037                                       uint32_t client_id, uint64_t srvid);
1038 int daemon_check_srvids(struct ctdb_context *ctdb, TDB_DATA indata,
1039                         TDB_DATA *outdata);
1040
1041 int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork);
1042
1043 struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb,
1044                                                  TALLOC_CTX *mem_ctx,
1045                                                  enum ctdb_operation operation,
1046                                                  size_t length, size_t slength,
1047                                                  const char *type);
1048
1049 #define ctdb_transport_allocate(ctdb, mem_ctx, operation, length, type) \
1050         (type *)_ctdb_transport_allocate(ctdb, mem_ctx, operation, length, \
1051                                          sizeof(type), #type)
1052
1053 void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb,
1054                                  struct ctdb_node *node);
1055
1056 int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id,
1057                          ctdb_fn_t fn, int id);
1058
1059 int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t pnn,
1060                              uint64_t srvid, TDB_DATA data);
1061
1062 int32_t ctdb_control_register_notify(struct ctdb_context *ctdb,
1063                                      uint32_t client_id, TDB_DATA indata);
1064 int32_t ctdb_control_deregister_notify(struct ctdb_context *ctdb,
1065                                        uint32_t client_id, TDB_DATA indata);
1066
1067 struct ctdb_client *ctdb_find_client_by_pid(struct ctdb_context *ctdb,
1068                                             pid_t pid);
1069
1070 int32_t ctdb_control_process_exists(struct ctdb_context *ctdb, pid_t pid);
1071
1072 int ctdb_control_getnodesfile(struct ctdb_context *ctdb, uint32_t opcode,
1073                               TDB_DATA indata, TDB_DATA *outdata);
1074
1075 void ctdb_shutdown_sequence(struct ctdb_context *ctdb, int exit_code);
1076
1077 /* from server/ctdb_freeze.c */
1078
1079 int32_t ctdb_control_db_freeze(struct ctdb_context *ctdb,
1080                                struct ctdb_req_control *c,
1081                                uint32_t db_id, bool *async_reply);
1082 int32_t ctdb_control_db_thaw(struct ctdb_context *ctdb, uint32_t db_id);
1083
1084 int32_t ctdb_control_freeze(struct ctdb_context *ctdb,
1085                             struct ctdb_req_control *c, bool *async_reply);
1086 int32_t ctdb_control_thaw(struct ctdb_context *ctdb, uint32_t priority,
1087                           bool check_recmode);
1088
1089 bool ctdb_blocking_freeze(struct ctdb_context *ctdb);
1090
1091 int32_t ctdb_control_db_transaction_start(struct ctdb_context *ctdb,
1092                                           TDB_DATA indata);
1093 int32_t ctdb_control_db_transaction_cancel(struct ctdb_context *ctdb,
1094                                            TDB_DATA indata);
1095 int32_t ctdb_control_db_transaction_commit(struct ctdb_context *ctdb,
1096                                            TDB_DATA indata);
1097
1098 int32_t ctdb_control_transaction_start(struct ctdb_context *ctdb, uint32_t id);
1099 int32_t ctdb_control_transaction_cancel(struct ctdb_context *ctdb);
1100 int32_t ctdb_control_transaction_commit(struct ctdb_context *ctdb, uint32_t id);
1101
1102 int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata);
1103
1104 bool ctdb_db_frozen(struct ctdb_db_context *ctdb_db);
1105 bool ctdb_db_prio_frozen(struct ctdb_context *ctdb, uint32_t priority);
1106 bool ctdb_db_all_frozen(struct ctdb_context *ctdb);
1107
1108 /* from server/ctdb_keepalive.c */
1109
1110 void ctdb_start_keepalive(struct ctdb_context *ctdb);
1111 void ctdb_stop_keepalive(struct ctdb_context *ctdb);
1112
1113 /* from server/ctdb_lock.c */
1114
1115 struct lock_request;
1116
1117 typedef int (*ctdb_db_handler_t)(struct ctdb_db_context *ctdb_db,
1118                                  void *private_data);
1119
1120 int ctdb_db_prio_iterator(struct ctdb_context *ctdb, uint32_t priority,
1121                           ctdb_db_handler_t handler, void *private_data);
1122 int ctdb_db_iterator(struct ctdb_context *ctdb, ctdb_db_handler_t handler,
1123                      void *private_data);
1124
1125 int ctdb_lockdb_mark(struct ctdb_db_context *ctdb_db);
1126 int ctdb_lockall_mark_prio(struct ctdb_context *ctdb, uint32_t priority);
1127
1128 int ctdb_lockdb_unmark(struct ctdb_db_context *ctdb_db);
1129 int ctdb_lockall_unmark_prio(struct ctdb_context *ctdb, uint32_t priority);
1130
1131 struct lock_request *ctdb_lock_record(TALLOC_CTX *mem_ctx,
1132                                       struct ctdb_db_context *ctdb_db,
1133                                       TDB_DATA key,
1134                                       bool auto_mark,
1135                                       void (*callback)(void *, bool),
1136                                       void *private_data);
1137
1138 struct lock_request *ctdb_lock_db(TALLOC_CTX *mem_ctx,
1139                                   struct ctdb_db_context *ctdb_db,
1140                                   bool auto_mark,
1141                                   void (*callback)(void *, bool),
1142                                   void *private_data);
1143
1144 struct lock_request *ctdb_lock_alldb_prio(TALLOC_CTX *mem_ctx,
1145                                           struct ctdb_context *ctdb,
1146                                           uint32_t priority,
1147                                           bool auto_mark,
1148                                           void (*callback)(void *, bool),
1149                                           void *private_data);
1150
1151 struct lock_request *ctdb_lock_alldb(TALLOC_CTX *mem_ctx,
1152                                      struct ctdb_context *ctdb,
1153                                      bool auto_mark,
1154                                      void (*callback)(void *, bool),
1155                                      void *private_data);
1156
1157 /* from ctdb_logging.c */
1158
1159 typedef int (*ctdb_log_setup_fn_t)(TALLOC_CTX *mem_ctx,
1160                                    const char *logging,
1161                                    const char *app_name);
1162
1163 void ctdb_log_register_backend(const char *prefix, ctdb_log_setup_fn_t init);
1164
1165 bool ctdb_logging_init(TALLOC_CTX *mem_ctx, const char *logging);
1166
1167 struct ctdb_log_state *ctdb_vfork_with_logging(TALLOC_CTX *mem_ctx,
1168                                                struct ctdb_context *ctdb,
1169                                                const char *log_prefix,
1170                                                const char *helper,
1171                                                int helper_argc,
1172                                                const char **helper_argv,
1173                                                void (*logfn)(const char *,
1174                                                              uint16_t, void *),
1175                                                void *logfn_private, pid_t *pid);
1176
1177 int ctdb_set_child_logging(struct ctdb_context *ctdb);
1178 int ctdb_init_tevent_logging(struct ctdb_context *ctdb);
1179
1180 /* from ctdb_logging_file.c */
1181
1182 void ctdb_log_init_file(void);
1183
1184 /* from ctdb_logging_syslog.c */
1185
1186 void ctdb_log_init_syslog(void);
1187
1188 /* from ctdb_ltdb_server.c */
1189
1190 int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db,
1191                            TDB_DATA key, struct ctdb_req_header *hdr,
1192                            void (*recv_pkt)(void *, struct ctdb_req_header *),
1193                            void *recv_context, bool ignore_generation);
1194
1195 int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db,
1196                                  TDB_DATA key, struct ctdb_ltdb_header *header,
1197                                  struct ctdb_req_header *hdr, TDB_DATA *data,
1198                                  void (*recv_pkt)(void *, struct ctdb_req_header *),
1199                                  void *recv_context, bool ignore_generation);
1200
1201 int ctdb_load_persistent_health(struct ctdb_context *ctdb,
1202                                 struct ctdb_db_context *ctdb_db);
1203 int ctdb_update_persistent_health(struct ctdb_context *ctdb,
1204                                   struct ctdb_db_context *ctdb_db,
1205                                   const char *reason,/* NULL means healthy */
1206                                   int num_healthy_nodes);
1207 int ctdb_recheck_persistent_health(struct ctdb_context *ctdb);
1208
1209 int32_t ctdb_control_db_set_healthy(struct ctdb_context *ctdb,
1210                                     TDB_DATA indata);
1211 int32_t ctdb_control_db_get_health(struct ctdb_context *ctdb,
1212                                    TDB_DATA indata, TDB_DATA *outdata);
1213
1214 int ctdb_set_db_readonly(struct ctdb_context *ctdb,
1215                          struct ctdb_db_context *ctdb_db);
1216
1217 int ctdb_process_deferred_attach(struct ctdb_context *ctdb);
1218
1219 int32_t ctdb_control_db_attach(struct ctdb_context *ctdb, TDB_DATA indata,
1220                                TDB_DATA *outdata, uint64_t tdb_flags,
1221                                bool persistent, uint32_t client_id,
1222                                struct ctdb_req_control *c,
1223                                bool *async_reply);
1224 int32_t ctdb_control_db_detach(struct ctdb_context *ctdb, TDB_DATA indata,
1225                                uint32_t client_id);
1226
1227 int ctdb_attach_databases(struct ctdb_context *ctdb);
1228
1229 int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id,
1230                                 uint32_t srcnode);
1231 int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id);
1232
1233 int32_t ctdb_control_set_db_priority(struct ctdb_context *ctdb, TDB_DATA indata,
1234                                      uint32_t client_id);
1235
1236 int ctdb_set_db_sticky(struct ctdb_context *ctdb,
1237                        struct ctdb_db_context *ctdb_db);
1238
1239 void ctdb_db_statistics_reset(struct ctdb_db_context *ctdb_db);
1240
1241 int32_t ctdb_control_get_db_statistics(struct ctdb_context *ctdb,
1242                                        uint32_t db_id, TDB_DATA *outdata);
1243
1244 /* from ctdb_monitor.c */
1245
1246 int ctdb_set_notification_script(struct ctdb_context *ctdb, const char *script);
1247 void ctdb_run_notification_script(struct ctdb_context *ctdb, const char *event);
1248
1249 void ctdb_disable_monitoring(struct ctdb_context *ctdb);
1250 void ctdb_enable_monitoring(struct ctdb_context *ctdb);
1251 void ctdb_stop_monitoring(struct ctdb_context *ctdb);
1252
1253 void ctdb_wait_for_first_recovery(struct ctdb_context *ctdb);
1254
1255 int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata);
1256
1257 int32_t ctdb_monitoring_mode(struct ctdb_context *ctdb);
1258 bool ctdb_stopped_monitoring(struct ctdb_context *ctdb);
1259
1260 /* from ctdb_persistent.c */
1261
1262 void ctdb_persistent_finish_trans3_commits(struct ctdb_context *ctdb);
1263
1264 int32_t ctdb_control_trans3_commit(struct ctdb_context *ctdb,
1265                                    struct ctdb_req_control *c,
1266                                    TDB_DATA recdata, bool *async_reply);
1267
1268 int32_t ctdb_control_start_persistent_update(struct ctdb_context *ctdb,
1269                                              struct ctdb_req_control *c,
1270                                              TDB_DATA recdata);
1271 int32_t ctdb_control_cancel_persistent_update(struct ctdb_context *ctdb,
1272                                               struct ctdb_req_control *c,
1273                                               TDB_DATA recdata);
1274
1275 int32_t ctdb_control_get_db_seqnum(struct ctdb_context *ctdb,
1276                                    TDB_DATA indata, TDB_DATA *outdata);
1277
1278 /* from ctdb_recover.c */
1279
1280 int ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
1281                            TDB_DATA indata, TDB_DATA *outdata);
1282 int ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode,
1283                            TDB_DATA indata, TDB_DATA *outdata);
1284
1285 int ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode,
1286                           TDB_DATA indata, TDB_DATA *outdata);
1287 int ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode,
1288                             TDB_DATA indata, TDB_DATA *outdata);
1289
1290 int ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode);
1291
1292 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata,
1293                              TDB_DATA *outdata);
1294 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata);
1295
1296 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb);
1297
1298 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
1299                                  struct ctdb_req_control *c,
1300                                  TDB_DATA indata, bool *async_reply,
1301                                  const char **errormsg);
1302
1303 bool ctdb_recovery_have_lock(struct ctdb_context *ctdb);
1304 bool ctdb_recovery_lock(struct ctdb_context *ctdb);
1305 void ctdb_recovery_unlock(struct ctdb_context *ctdb);
1306
1307 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
1308                                  struct ctdb_req_control *c,
1309                                  bool *async_reply);
1310 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
1311                                  struct ctdb_req_control *c,
1312                                  bool *async_reply);
1313
1314 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb,
1315                                         TDB_DATA indata, TDB_DATA *outdata);
1316 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
1317                                      TDB_DATA indata, TDB_DATA *outdata);
1318
1319 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb,
1320                                       TDB_DATA *outdata);
1321
1322 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb);
1323 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb,
1324                                    uint32_t opcode, TDB_DATA indata);
1325
1326 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb);
1327 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb);
1328
1329 /* from ctdb_recoverd.c */
1330
1331 int ctdb_start_recoverd(struct ctdb_context *ctdb);
1332 void ctdb_stop_recoverd(struct ctdb_context *ctdb);
1333
1334 /* from ctdb_server.c */
1335
1336 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
1337
1338 int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const ctdb_sock_addr *nodeip);
1339
1340 int ctdb_set_recovery_lock_file(struct ctdb_context *ctdb, const char *file);
1341
1342 void ctdb_load_nodes_file(struct ctdb_context *ctdb);
1343
1344 int ctdb_set_address(struct ctdb_context *ctdb, const char *address);
1345
1346 uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb);
1347
1348 void ctdb_input_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *);
1349
1350 void ctdb_node_dead(struct ctdb_node *node);
1351 void ctdb_node_connected(struct ctdb_node *node);
1352
1353 void ctdb_queue_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
1354 void ctdb_queue_packet_opcode(struct ctdb_context *ctdb,
1355                               struct ctdb_req_header *hdr, unsigned opcode);
1356
1357 /* from ctdb_serverids.c */
1358
1359 int32_t ctdb_control_register_server_id(struct ctdb_context *ctdb,
1360                                         uint32_t client_id, TDB_DATA indata);
1361 int32_t ctdb_control_check_server_id(struct ctdb_context *ctdb,
1362                                      TDB_DATA indata);
1363 int32_t ctdb_control_unregister_server_id(struct ctdb_context *ctdb,
1364                                           TDB_DATA indata);
1365 int32_t ctdb_control_get_server_id_list(struct ctdb_context *ctdb,
1366                                         TDB_DATA *outdata);
1367
1368 /* from ctdb_statistics.c */
1369
1370 int ctdb_statistics_init(struct ctdb_context *ctdb);
1371
1372 int32_t ctdb_control_get_stat_history(struct ctdb_context *ctdb,
1373                                       struct ctdb_req_control *c,
1374                                       TDB_DATA *outdata);
1375
1376 /* from ctdb_takeover.c */
1377
1378 int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
1379                                  struct ctdb_req_control *c,
1380                                  TDB_DATA indata,
1381                                  bool *async_reply);
1382 int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
1383                                  struct ctdb_req_control *c,
1384                                  TDB_DATA indata,
1385                                  bool *async_reply);
1386 int32_t ctdb_control_ipreallocated(struct ctdb_context *ctdb,
1387                                  struct ctdb_req_control *c,
1388                                  bool *async_reply);
1389
1390 int ctdb_set_public_addresses(struct ctdb_context *ctdb, bool check_addresses);
1391 int ctdb_set_single_public_ip(struct ctdb_context *ctdb, const char *iface,
1392                               const char *ip);
1393
1394 int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
1395                       uint32_t *force_rebalance_nodes,
1396                       client_async_callback fail_callback, void *callback_data);
1397
1398 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id,
1399                                 TDB_DATA indata);
1400 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata,
1401                              bool tcp_update_needed);
1402 int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata);
1403 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn);
1404
1405 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client);
1406
1407 void ctdb_release_all_ips(struct ctdb_context *ctdb);
1408
1409 int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb,
1410                                     struct ctdb_req_control *c,
1411                                     TDB_DATA *outdata);
1412 int32_t ctdb_control_get_public_ip_info(struct ctdb_context *ctdb,
1413                                         struct ctdb_req_control *c,
1414                                         TDB_DATA indata, TDB_DATA *outdata);
1415
1416 int32_t ctdb_control_get_ifaces(struct ctdb_context *ctdb,
1417                                 struct ctdb_req_control *c,
1418                                 TDB_DATA *outdata);
1419 int32_t ctdb_control_set_iface_link(struct ctdb_context *ctdb,
1420                                     struct ctdb_req_control *c,
1421                                     TDB_DATA indata);
1422
1423 int32_t ctdb_control_kill_tcp(struct ctdb_context *ctdb, TDB_DATA indata);
1424 int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb,
1425                                          TDB_DATA indata);
1426 int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb,
1427                                          TDB_DATA indata, TDB_DATA *outdata);
1428
1429 void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb);
1430
1431 int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb,
1432                                        TDB_DATA indata);
1433
1434 int32_t ctdb_control_add_public_address(struct ctdb_context *ctdb,
1435                                         TDB_DATA indata);
1436 int32_t ctdb_control_del_public_address(struct ctdb_context *ctdb,
1437                                         struct ctdb_req_control *c,
1438                                         TDB_DATA recdata, bool *async_reply);
1439
1440 int verify_remote_ip_allocation(struct ctdb_context *ctdb,
1441                                 struct ctdb_all_public_ips *ips,
1442                                 uint32_t pnn);
1443 int update_ip_assignment_tree(struct ctdb_context *ctdb,
1444                                 struct ctdb_public_ip *ip);
1445 void clear_ip_assignment_tree(struct ctdb_context *ctdb);
1446
1447 int32_t ctdb_control_reload_public_ips(struct ctdb_context *ctdb,
1448                                        struct ctdb_req_control *c,
1449                                        bool *async_reply);
1450
1451 /* from ctdb_traverse.c */
1452
1453 int32_t ctdb_control_traverse_all_ext(struct ctdb_context *ctdb,
1454                                       TDB_DATA data, TDB_DATA *outdata);
1455 int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb,
1456                                   TDB_DATA data, TDB_DATA *outdata);
1457 int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb,
1458                                    TDB_DATA data, TDB_DATA *outdata);
1459 int32_t ctdb_control_traverse_kill(struct ctdb_context *ctdb, TDB_DATA indata,
1460                                     TDB_DATA *outdata, uint32_t srcnode);
1461
1462 int32_t ctdb_control_traverse_start_ext(struct ctdb_context *ctdb,
1463                                         TDB_DATA indata, TDB_DATA *outdata,
1464                                         uint32_t srcnode, uint32_t client_id);
1465 int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb,
1466                                     TDB_DATA indata, TDB_DATA *outdata,
1467                                     uint32_t srcnode, uint32_t client_id);
1468
1469 /* from ctdb_tunables.c */
1470
1471 void ctdb_tunables_set_defaults(struct ctdb_context *ctdb);
1472
1473 int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
1474                                  TDB_DATA *outdata);
1475 int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata);
1476 int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb,
1477                                    TDB_DATA *outdata);
1478
1479 /* from ctdb_update_record.c */
1480
1481 int32_t ctdb_control_update_record(struct ctdb_context *ctdb,
1482                                    struct ctdb_req_control *c,
1483                                    TDB_DATA recdata, bool *async_reply);
1484
1485 /* from ctdb_uptime.c */
1486
1487 int32_t ctdb_control_uptime(struct ctdb_context *ctdb, TDB_DATA *outdata);
1488
1489 /* from ctdb_vacuum.c */
1490
1491 void ctdb_stop_vacuuming(struct ctdb_context *ctdb);
1492 int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db);
1493
1494 int32_t ctdb_control_schedule_for_deletion(struct ctdb_context *ctdb,
1495                                            TDB_DATA indata);
1496 int32_t ctdb_local_schedule_for_deletion(struct ctdb_db_context *ctdb_db,
1497                                          const struct ctdb_ltdb_header *hdr,
1498                                          TDB_DATA key);
1499
1500 void ctdb_local_remove_from_delete_queue(struct ctdb_db_context *ctdb_db,
1501                                          const struct ctdb_ltdb_header *hdr,
1502                                          const TDB_DATA key);
1503
1504 #endif