ctdb/include/ctdb.h

   1 /*
   2    ctdb database library
   3
   4    Copyright (C) Ronnie sahlberg 2010
   5    Copyright (C) Rusty Russell 2010
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #ifndef _CTDB_H
  22 #define _CTDB_H
  23 #include <sys/types.h>
  24 #include <stdint.h>
  25 #include <stdbool.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <tdb.h>
  29 #include <netinet/in.h>
  30 #include <ctdb_protocol.h>
  31
  32 /**
  33  * ctdb - a library for accessing tdbs controlled by ctdbd
  34  *
  35  * ctdbd (clustered tdb daemon) is a daemon designed to syncronize TDB
  36  * databases across a cluster.  Using this library, you can communicate with
  37  * the daemon to access the databases, pass messages across the cluster, and
  38  * control the daemon itself.
  39  *
  40  * The general API is event-driven and asynchronous: you call the
  41  * *_send functions, supplying callbacks, then when the ctdbd file
  42  * descriptor is usable, call ctdb_service() to perform read from it
  43  * and call your callbacks, which use the *_recv functions to unpack
  44  * the replies from ctdbd.
  45  *
  46  * There is also a synchronous wrapper for each function for trivial
  47  * programs; these can be found in the section marked "Synchronous API".
  48  */
  49
  50 /**
  51  * ctdb_log_fn_t - logging function for ctdbd
  52  * @log_priv: private (typesafe) arg via ctdb_connect
  53  * @severity: syslog-style severity
  54  * @format: printf-style format string.
  55  * @ap: arguments for formatting.
  56  *
  57  * The severity passed to log() are as per syslog(3).  In particular,
  58  * LOG_DEBUG is used for tracing, LOG_WARNING is used for unusual
  59  * conditions which don't necessarily return an error through the API,
  60  * LOG_ERR is used for errors such as lost communication with ctdbd or
  61  * out-of-memory, LOG_ALERT is used for library usage bugs, LOG_CRIT is
  62  * used for libctdb internal consistency checks.
  63  *
  64  * The log() function can be typesafe: the @log_priv arg to
  65  * ctdb_donnect and signature of log() should match.
  66  */
  67 typedef void (*ctdb_log_fn_t)(void *log_priv,
  68                               int severity, const char *format, va_list ap);
  69
  70 /**
  71  * ctdb_connect - connect to ctdb using the specified domain socket.
  72  * @addr: the socket address, or NULL for default
  73  * @log: the logging function
  74  * @log_priv: the private argument to the logging function.
  75  *
  76  * Returns a ctdb context if successful or NULL.  Use ctdb_disconnect() to
  77  * release the returned ctdb_connection when finished.
  78  *
  79  * See Also:
  80  *      ctdb_log_fn_t, ctdb_log_file()
  81  */
  82 struct ctdb_connection *ctdb_connect(const char *addr,
  83                                      ctdb_log_fn_t log_fn, void *log_priv);
  84
  85 /**
  86  * ctdb_log_file - example logging function
  87  *
  88  * Logs everything at priority LOG_WARNING or above to the file given (via
  89  * the log_priv argument, usually stderr).
  90  */
  91 void ctdb_log_file(FILE *, int, const char *, va_list);
  92
  93 /**
  94  * ctdb_log_level - level at which to call logging function
  95  *
  96  * This variable globally controls filtering on the logging function.
  97  * It is initialized to LOG_WARNING, meaning that strange but nonfatal
  98  * events, as well as errors and API misuses are reported.
  99  *
 100  * Set it to LOG_DEBUG to receive all messages.
 101  */
 102 extern int ctdb_log_level;
 103
 104 /**
 105  * ctdb_disconnect - close down a connection to ctdbd.
 106  * @ctdb: the ctdb connectio returned from ctdb_connect.
 107  *
 108  * The @ctdb arg will be freed by this call, and must not be used again.
 109  */
 110 void ctdb_disconnect(struct ctdb_connection *ctdb);
 111
 112 /***
 113  *
 114  *  Asynchronous API
 115  *
 116  ***/
 117
 118 /**
 119  * ctdb_num_active - get the number of active commands
 120  * @ctdb: the ctdb_connection from ctdb_connect.
 121  *
 122  * This command can be used to find the number of active commands we have
 123  * issued. An active command is a command we have queued, or sent
 124  * to the ctdb daemon but which we have not yet received a reply to.
 125  *
 126  * See Also:
 127  *      ctdb_num_in_flight(), ctdb_num_out_queue()
 128  */
 129 int ctdb_num_active(struct ctdb_connection *ctdb);
 130
 131 /**
 132  * ctdb_num_in_flight - get the number of commands in flight.
 133  * @ctdb: the ctdb_connection from ctdb_connect.
 134  *
 135  * This command can be used to find the number of commands we have
 136  * sent to the ctdb daemon to which we have not yet received/processed
 137  * the reply.
 138  *
 139  * See Also:
 140  *      ctdb_num_out_queue(), ctdb_num_active()
 141  */
 142 int ctdb_num_in_flight(struct ctdb_connection *ctdb);
 143
 144 /**
 145  * ctdb_num_out_queue - get the number of commands in the out queue
 146  * @ctdb: the ctdb_connection from ctdb_connect.
 147  *
 148  * This command can be used to find the number of commands we have
 149  * queued for delivery to the ctdb daemon but have not yet been
 150  * written to the domain socket.
 151  *
 152  * See Also:
 153  *      ctdb_num_in_flight(), ctdb_num_active()
 154  */
 155 int ctdb_num_out_queue(struct ctdb_connection *ctdb);
 156
 157 /**
 158  * ctdb_get_fd - get the filedescriptor to select/poll on
 159  * @ctdb: the ctdb_connection from ctdb_connect.
 160  *
 161  * By using poll or select on this file descriptor, you will know when to call
 162  * ctdb_service().
 163  *
 164  * See Also:
 165  *      ctdb_which_events(), ctdb_service()
 166  */
 167 int ctdb_get_fd(struct ctdb_connection *ctdb);
 168
 169 /**
 170  * ctdb_which_events - determine which events ctdb_service wants to see
 171  * @ctdb: the ctdb_connection from ctdb_connect.
 172  *
 173  * This returns POLLIN, possibly or'd with POLLOUT if there are writes
 174  * pending.  You can set this straight into poll.events.
 175  *
 176  * See Also:
 177  *      ctdb_service()
 178  */
 179 int ctdb_which_events(struct ctdb_connection *ctdb);
 180
 181 /**
 182  * ctdb_service - service any I/O and callbacks from ctdbd communication
 183  * @ctdb: the ctdb_connection from ctdb_connect.
 184  * @revents: which events are available.
 185  *
 186  * This is the core of the library: it read and writes to the ctdbd
 187  * socket.  It may call callbacks registered with the various _send
 188  * functions.
 189  *
 190  * revents is a bitset: POLLIN and/or POLLOUT may be set to indicate
 191  * it is worth attempting to read/write the (nonblocking)
 192  * filedescriptor respectively.
 193  *
 194  * Note that the synchronous functions call this internally.
 195  * Returns false on catastrophic failure.
 196  */
 197 bool ctdb_service(struct ctdb_connection *ctdb, int revents);
 198
 199 /**
 200  * struct ctdb_request - handle for an outstanding request
 201  *
 202  * This opaque structure returned from various *_send functions gives
 203  * you a handle by which you can cancel a request.  You can't do
 204  * anything else with it until the request is completed and it is
 205  * handed to your callback function.
 206  */
 207 struct ctdb_request;
 208
 209 /**
 210  * ctdb_request_free - free a completed request
 211  *
 212  * This frees a request: you should only call it once it has been
 213  * handed to your callback.  For incomplete requests, see ctdb_cancel().
 214  */
 215 void ctdb_request_free(struct ctdb_request *req);
 216
 217 /**
 218  * ctdb_callback_t - callback for completed requests.
 219  *
 220  * This would normally unpack the request using ctdb_*_recv().  You
 221  * must free the request using ctdb_request_free().
 222  *
 223  * Note that due to macro magic, actual your callback can be typesafe:
 224  * instead of taking a void *, it can take a type which matches the
 225  * actual private parameter.
 226  */
 227 typedef void (*ctdb_callback_t)(struct ctdb_connection *ctdb,
 228                                 struct ctdb_request *req, void *private_data);
 229
 230 /**
 231  * struct ctdb_db - connection to a particular open TDB
 232  *
 233  * This represents a particular open database: you receive it from
 234  * ctdb_attachdb or ctdb_attachdb_recv to manipulate a database.
 235  *
 236  * You have to free the handle with ctdb_detachdb() when finished with it.
 237  */
 238 struct ctdb_db;
 239
 240 /**
 241  * ctdb_attachdb_send - open a clustered TDB
 242  * @ctdb: the ctdb_connection from ctdb_connect.
 243  * @name: the filename of the database (no /).
 244  * @persistent: whether the database is persistent across ctdbd's life
 245  * @tdb_flags: the flags to pass to tdb_open.
 246  * @callback: the callback when we're attached or failed (typesafe)
 247  * @cbdata: the argument to callback()
 248  *
 249  * This function connects to a TDB controlled by ctdbd.  It can create
 250  * a new TDB if it does not exist, depending on tdb_flags.  Returns
 251  * the pending request, or NULL on error.
 252  */
 253 struct ctdb_request *
 254 ctdb_attachdb_send(struct ctdb_connection *ctdb,
 255                    const char *name, bool persistent, uint32_t tdb_flags,
 256                    ctdb_callback_t callback, void *cbdata);
 257
 258 /**
 259  * ctdb_attachdb_recv - read an ctdb_attach reply from ctdbd
 260  * @ctdb: the ctdb_connection from ctdb_connect.
 261  * @req: the completed request.
 262  *
 263  * This returns NULL if something went wrong, or otherwise the open database.
 264  */
 265 struct ctdb_db *ctdb_attachdb_recv(struct ctdb_connection *ctdb,
 266                                    struct ctdb_request *req);
 267
 268
 269 /**
 270  * struct ctdb_lock - a record lock on a clustered TDB database
 271  *
 272  * This locks a subset of the database across the entire cluster; it
 273  * is the fundamental sychronization element for ctdb.  You cannot have
 274  * more than one lock at once.
 275  *
 276  * You MUST NOT block during holding this lock and MUST release it
 277  * quickly by performing ctdb_release_lock(lock).
 278  * Do NOT make any system calls that may block while holding the lock.
 279  *
 280  * Try to release the lock as quickly as possible.
 281  */
 282 struct ctdb_lock;
 283
 284 /**
 285  * ctdb_rrl_callback_t - callback for ctdb_readrecordlock_async
 286  *
 287  * This is not the standard ctdb_callback_t, because there is often no
 288  * request required to access a database record (ie. if it is local already).
 289  * So the callback is handed the lock directly: it might be NULL if there
 290  * was an error obtaining the lock.
 291  *
 292  * See Also:
 293  *      ctdb_readrecordlock_async(), ctdb_readrecordlock()
 294  */
 295 typedef void (*ctdb_rrl_callback_t)(struct ctdb_db *ctdb_db,
 296                                     struct ctdb_lock *lock,
 297                                     TDB_DATA data,
 298                                     void *private_data);
 299
 300 /**
 301  * ctdb_readrecordlock_async - read and lock a record
 302  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 303  * @key: the key of the record to lock.
 304  * @callback: the callback once the record is locked (typesafe).
 305  * @cbdata: the argument to callback()
 306  *
 307  * This returns true on success.  Commonly, we can obtain the record
 308  * immediately and so the callback will be invoked.  Otherwise a request
 309  * will be queued to ctdbd for the record.
 310  *
 311  * If failure is immediate, false is returned.  Otherwise, the callback
 312  * may receive a NULL lock arg to indicate asynchronous failure.
 313  */
 314 bool ctdb_readrecordlock_async(struct ctdb_db *ctdb_db, TDB_DATA key,
 315                                ctdb_rrl_callback_t callback, void *cbdata);
 316
 317 /**
 318  * ctdb_readonlyrecordlock_async - read and lock a record for read-only access
 319  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 320  * @key: the key of the record to lock.
 321  * @callback: the callback once the record is locked (typesafe).
 322  * @cbdata: the argument to callback()
 323  *
 324  * This returns true on success.  Commonly, we can obtain the record
 325  * immediately and so the callback will be invoked.  Otherwise a request
 326  * will be queued to ctdbd for the record.
 327  *
 328  * If failure is immediate, false is returned.  Otherwise, the callback
 329  * may receive a NULL lock arg to indicate asynchronous failure.
 330  */
 331 bool ctdb_readonlyrecordlock_async(struct ctdb_db *ctdb_db, TDB_DATA key,
 332                                ctdb_rrl_callback_t callback, void *cbdata);
 333
 334
 335 /**
 336  * ctdb_writerecord - write a locked record in a TDB
 337  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 338  * @lock: the lock from ctdb_readrecordlock/ctdb_readrecordlock_recv
 339  * @data: the new data to place in the record.
 340  */
 341 bool ctdb_writerecord(struct ctdb_db *ctdb_db,
 342                       struct ctdb_lock *lock, TDB_DATA data);
 343
 344 /**
 345  * ctdb_release_lock - release a record lock on a TDB
 346  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 347  * @lock: the lock from ctdb_readrecordlock/ctdb_readrecordlock_async
 348  */
 349 void ctdb_release_lock(struct ctdb_db *ctdb_db, struct ctdb_lock *lock);
 350
 351
 352
 353 /**
 354  * ctdb_traverse_callback_t - callback for ctdb_traverse_async.
 355  * return 0 - to continue traverse
 356  * return 1 - to abort the traverse
 357  *
 358  * See Also:
 359  *      ctdb_traverse_async()
 360  */
 361 #define TRAVERSE_STATUS_RECORD          0
 362 #define TRAVERSE_STATUS_FINISHED        1
 363 #define TRAVERSE_STATUS_ERROR           2
 364 typedef int (*ctdb_traverse_callback_t)(struct ctdb_connection *ctdb,
 365                                     struct ctdb_db *ctdb_db,
 366                                     int status,
 367                                     TDB_DATA key,
 368                                     TDB_DATA data,
 369                                     void *private_data);
 370
 371 /**
 372  * ctdb_traverse_async - traverse a database.
 373  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 374  * @callback: the callback once the record is locked (typesafe).
 375  * @cbdata: the argument to callback()
 376  *
 377  * This returns true on success.
 378  * when successfull, the callback will be invoked for each record
 379  * until the traversal is finished.
 380  *
 381  * status ==
 382  * TRAVERSE_STATUS_RECORD         key/data contains a record.
 383  * TRAVERSE_STATUS_FINISHED       traverse is finished. key/data is undefined.
 384  * TRAVERSE_STATUS_ERROR          an error occured during traverse.
 385  *                                key/data is undefined.
 386  *
 387  * If failure is immediate, false is returned.
 388  */
 389 bool ctdb_traverse_async(struct ctdb_db *ctdb_db,
 390                          ctdb_traverse_callback_t callback, void *cbdata);
 391
 392 /**
 393  * ctdb_message_fn_t - messaging callback for ctdb messages
 394  *
 395  * ctdbd provides a simple messaging API; you can register for a particular
 396  * 64-bit id on which you want to send messages, and send to other ids.
 397  *
 398  * See Also:
 399  *      ctdb_set_message_handler_send()
 400  */
 401 typedef void (*ctdb_message_fn_t)(struct ctdb_connection *,
 402                                   uint64_t srvid, TDB_DATA data, void *);
 403
 404 /**
 405  * ctdb_set_message_handler_send - register for messages to a srvid
 406  * @ctdb: the ctdb_connection from ctdb_connect.
 407  * @srvid: the 64 bit identifier for our messages.
 408  * @handler: the callback when we receive such a message (typesafe)
 409  * @handler_data: the argument to handler()
 410  * @callback: the callback when ctdb replies to our message (typesafe)
 411  * @cbdata: the argument to callback()
 412  *
 413  * Note: our callback will always be called before handler.
 414  *
 415  * See Also:
 416  *      ctdb_set_message_handler_recv(), ctdb_remove_message_handler_send()
 417  */
 418 struct ctdb_request *
 419 ctdb_set_message_handler_send(struct ctdb_connection *ctdb, uint64_t srvid,
 420                               ctdb_message_fn_t handler,
 421                               void *handler_data,
 422                               ctdb_callback_t callback,
 423                               void *cbdata);
 424
 425 /**
 426  * ctdb_set_message_handler_recv - read a set_message_handler result
 427  * @ctdb: the ctdb_connection from ctdb_connect.
 428  * @req: the completed request
 429  *
 430  * If this returns true, the registered handler may be called from the next
 431  * ctdb_service().  If this returns false, the registration failed.
 432  */
 433 bool ctdb_set_message_handler_recv(struct ctdb_connection *ctdb,
 434                                    struct ctdb_request *handle);
 435
 436 /**
 437  * ctdb_remove_message_handler_send - unregister for messages to a srvid
 438  * @ctdb: the ctdb_connection from ctdb_connect.
 439  * @srvid: the 64 bit identifier for our messages.
 440  * @handler: the callback when we receive such a message (typesafe)
 441  * @handler_data: the argument to handler()
 442  * @callback: the callback when ctdb replies to our message (typesafe)
 443  * @cbdata: the argument to callback()
 444  *
 445  * This undoes a successful ctdb_set_message_handler or
 446  * ctdb_set_message_handler_recv.
 447  */
 448 struct ctdb_request *
 449 ctdb_remove_message_handler_send(struct ctdb_connection *ctdb, uint64_t srvid,
 450                                  ctdb_message_fn_t handler, void *handler_data,
 451                                  ctdb_callback_t callback, void *cbdata);
 452
 453 /**
 454  * ctdb_remove_message_handler_recv - read a remove_message_handler result
 455  * @ctdb: the ctdb_connection from ctdb_connect.
 456  * @req: the completed request
 457  *
 458  * After this returns true, the registered handler will no longer be called.
 459  * If this returns false, the de-registration failed.
 460  */
 461 bool ctdb_remove_message_handler_recv(struct ctdb_connection *ctdb,
 462                                       struct ctdb_request *req);
 463
 464
 465 /**
 466  * ctdb_send_message - send a message via ctdbd
 467  * @ctdb: the ctdb_connection from ctdb_connect.
 468  * @pnn: the physical node number to send to
 469  * @srvid: the 64 bit identifier for this message type.
 470  * @data: the data to send
 471  *
 472  * This allows arbitrary messages to be sent across the cluster to those
 473  * listening (via ctdb_set_message_handler et al).
 474  *
 475  * This queues a message to be sent: you will need to call
 476  * ctdb_service() to actually send the message.  There is no callback
 477  * because there is no acknowledgement.
 478  *
 479  * See Also:
 480  *      ctdb_getpnn_send(), ctdb_getpnn()
 481  */
 482 bool ctdb_send_message(struct ctdb_connection *ctdb, uint32_t pnn, uint64_t srvid, TDB_DATA data);
 483
 484 /**
 485  * ctdb_getpnn_send - read the pnn number of a node.
 486  * @ctdb: the ctdb_connection from ctdb_connect.
 487  * @destnode: the destination node (see below)
 488  * @callback: the callback when ctdb replies to our message (typesafe)
 489  * @cbdata: the argument to callback()
 490  *
 491  * There are several special values for destnode, detailed in
 492  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 493  * local ctdbd.
 494  */
 495 struct ctdb_request *
 496 ctdb_getpnn_send(struct ctdb_connection *ctdb,
 497                  uint32_t destnode,
 498                  ctdb_callback_t callback,
 499                  void *cbdata);
 500 /**
 501  * ctdb_getpnn_recv - read an ctdb_getpnn reply from ctdbd
 502  * @ctdb: the ctdb_connection from ctdb_connect.
 503  * @req: the completed request.
 504  * @pnn: a pointer to the pnn to fill in
 505  *
 506  * This returns false if something went wrong, or otherwise fills in pnn.
 507  */
 508 bool ctdb_getpnn_recv(struct ctdb_connection *ctdb,
 509                       struct ctdb_request *req, uint32_t *pnn);
 510
 511
 512 /**
 513  * ctdb_getdbstat_send - read statistics for a db
 514  * @ctdb: the ctdb_connection from ctdb_connect.
 515  * @destnode: the destination node (see below)
 516  * @db_id:    the database to collect the statistics from
 517  * @callback: the callback when ctdb replies to our message (typesafe)
 518  * @cbdata: the argument to callback()
 519  *
 520  * There are several special values for destnode, detailed in
 521  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 522  * local ctdbd.
 523  */
 524 struct ctdb_request *
 525 ctdb_getdbstat_send(struct ctdb_connection *ctdb,
 526                      uint32_t destnode,
 527                      uint32_t db_id,
 528                      ctdb_callback_t callback,
 529                      void *cbdata);
 530 /**
 531  * ctdb_getdbstat_recv - read an ctdb_getdbstat reply from ctdbd
 532  * @ctdb: the ctdb_connection from ctdb_connect.
 533  * @req: the completed request.
 534  * @stat: a pointer to the *stat to fill in
 535  *
 536  * This returns false if something went wrong, or otherwise fills in **stats
 537  * stats must be freed later by calling ctdb_free_dbstat();
 538  */
 539 bool ctdb_getdbstat_recv(struct ctdb_connection *ctdb,
 540                          struct ctdb_request *req,
 541                          struct ctdb_db_statistics **stat);
 542
 543 void ctdb_free_dbstat(struct ctdb_db_statistics *stat);
 544
 545 /**
 546  * ctdb_check_message_handlers_send - check a list of message_handlers
 547  * if they are registered
 548  * message_handlers are registered on the daemon using the
 549  *   ctdb_set_message_handler_send() call
 550  *
 551  * @ctdb: the ctdb_connection from ctdb_connect.
 552  * @destnode: the destination node (see below)
 553  * @num: number of srvids to check
 554  * @mhs: @num message_handlers values to check
 555  * @callback: the callback when ctdb replies to our message (typesafe)
 556  * @cbdata: the argument to callback()
 557  *
 558  * There are several special values for destnode, detailed in
 559  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 560  * local ctdbd.
 561  */
 562 struct ctdb_request *
 563 ctdb_check_message_handlers_send(struct ctdb_connection *ctdb,
 564                  uint32_t destnode,
 565                  uint32_t num,
 566                  uint64_t *mhs,
 567                  ctdb_callback_t callback,
 568                  void *cbdata);
 569 /**
 570  * ctdb_check_message_handlers_recv - read a ctdb_check_message_handlers
 571  * reply from ctdbd
 572  * @ctdb: the ctdb_connection from ctdb_connect.
 573  * @req: the completed request.
 574  * @num: number of message_handlers to check
 575  * @result: an array of @num uint8_t fields containing the result of the check
 576  *     0: message_handler does not exist
 577  *     1: message_handler exists
 578  *
 579  * This returns false if something went wrong, or otherwise fills in result.
 580  */
 581 bool
 582 ctdb_check_message_handlers_recv(struct ctdb_connection *ctdb,
 583                                   struct ctdb_request *req, uint32_t num,
 584                                   uint8_t *result);
 585
 586
 587 /**
 588  * ctdb_getdbseqnum_send - read the sequence number off a db
 589  * @ctdb: the ctdb_connection from ctdb_connect.
 590  * @destnode: the destination node (see below)
 591  * @dbid: database id
 592  * @callback: the callback when ctdb replies to our message (typesafe)
 593  * @cbdata: the argument to callback()
 594  *
 595  * There are several special values for destnode, detailed in
 596  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 597  * local ctdbd.
 598  */
 599 struct ctdb_request *
 600 ctdb_getdbseqnum_send(struct ctdb_connection *ctdb,
 601                  uint32_t destnode,
 602                  uint32_t dbid,
 603                  ctdb_callback_t callback,
 604                  void *cbdata);
 605 /**
 606  * ctdb_getdbseqnum_recv - read the sequence number off a database
 607  * @ctdb: the ctdb_connection from ctdb_connect.
 608  * @req: the completed request.
 609  * @seqnum: a pointer to the seqnum to fill in
 610  *
 611  * This returns false if something went wrong, or otherwise fills in pnn.
 612  */
 613 bool ctdb_getdbseqnum_recv(struct ctdb_connection *ctdb,
 614                       struct ctdb_request *req, uint64_t *seqnum);
 615
 616 /**
 617  * ctdb_getnodemap_send - read the nodemap number from a node.
 618  * @ctdb: the ctdb_connection from ctdb_connect.
 619  * @destnode: the destination node (see below)
 620  * @callback: the callback when ctdb replies to our message (typesafe)
 621  * @cbdata: the argument to callback()
 622  *
 623  * There are several special values for destnode, detailed in
 624  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 625  * local ctdbd.
 626  */
 627 struct ctdb_request *
 628 ctdb_getnodemap_send(struct ctdb_connection *ctdb,
 629                  uint32_t destnode,
 630                  ctdb_callback_t callback,
 631                  void *cbdata);
 632 /**
 633  * ctdb_getnodemap_recv - read an ctdb_getnodemap reply from ctdbd
 634  * @ctdb: the ctdb_connection from ctdb_connect.
 635  * @req: the completed request.
 636  * @nodemap: a pointer to the returned nodemap structure
 637  *
 638  * This returns false if something went wrong.
 639  * If the command failed, it guarantees to set nodemap to NULL.
 640  * A non-NULL value for nodemap means the command was successful.
 641  *
 642  * A non-NULL value of the nodemap must be release released/freed
 643  * by ctdb_free_nodemap().
 644  */
 645 bool ctdb_getnodemap_recv(struct ctdb_connection *ctdb,
 646                       struct ctdb_request *req, struct ctdb_node_map **nodemap);
 647
 648 /**
 649  * ctdb_getifaces_send - read the list of interfaces from a node.
 650  * @ctdb: the ctdb_connection from ctdb_connect.
 651  * @destnode: the destination node (see below)
 652  * @callback: the callback when ctdb replies to our message (typesafe)
 653  * @cbdata: the argument to callback()
 654  *
 655  * There are several special values for destnode, detailed in
 656  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 657  * local ctdbd.
 658  */
 659 struct ctdb_request *
 660 ctdb_getifaces_send(struct ctdb_connection *ctdb,
 661                  uint32_t destnode,
 662                  ctdb_callback_t callback,
 663                  void *cbdata);
 664 /**
 665  * ctdb_getifaces_recv - read an ctdb_getifaces reply from ctdbd
 666  * @ctdb: the ctdb_connection from ctdb_connect.
 667  * @req: the completed request.
 668  * @ifaces: the list of interfaces
 669  *
 670  * This returns false if something went wrong.
 671  * If the command failed, it guarantees to set ifaces to NULL.
 672  * A non-NULL value for ifaces means the command was successful.
 673  *
 674  * A non-NULL value of the ifaces must be release released/freed
 675  * by ctdb_free_ifaces().
 676  */
 677 bool ctdb_getifaces_recv(struct ctdb_connection *ctdb,
 678                       struct ctdb_request *req, struct ctdb_ifaces_list **ifaces);
 679
 680 /* Free a datastructure returned by ctdb_getifaces[_recv] */
 681 void ctdb_free_ifaces(struct ctdb_ifaces_list *ifaces);
 682
 683 /**
 684  * ctdb_getpublicips_send - read the public ip list from a node.
 685  * @ctdb: the ctdb_connection from ctdb_connect.
 686  * @destnode: the destination node (see below)
 687  * @callback: the callback when ctdb replies to our message (typesafe)
 688  * @cbdata: the argument to callback()
 689  *
 690  * This control returns the list of public ips known to the local node.
 691  * Deamons only know about those ips that are listed in the local
 692  * public addresses file, which means the returned list of ips may
 693  * be only a subset of all ips across the entire cluster.
 694  *
 695  * There are several special values for destnode, detailed in
 696  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 697  * local ctdbd.
 698  */
 699 struct ctdb_request *
 700 ctdb_getpublicips_send(struct ctdb_connection *ctdb,
 701                  uint32_t destnode,
 702                  ctdb_callback_t callback,
 703                  void *cbdata);
 704 /**
 705  * ctdb_getpublicips_recv - read the public ip list from a node
 706  * @ctdb: the ctdb_connection from ctdb_connect.
 707  * @req: the completed request.
 708  * @ips: a pointer to the returned public ip list
 709  *
 710  * This returns false if something went wrong.
 711  * If the command failed, it guarantees to set ips to NULL.
 712  * A non-NULL value for nodemap means the command was successful.
 713  *
 714  * A non-NULL value of the nodemap must be release released/freed
 715  * by ctdb_free_publicips().
 716  */
 717 bool ctdb_getpublicips_recv(struct ctdb_connection *ctdb,
 718                       struct ctdb_request *req, struct ctdb_all_public_ips **ips);
 719
 720
 721 /**
 722  * ctdb_getrecmaster_send - read the recovery master of a node
 723  * @ctdb: the ctdb_connection from ctdb_connect.
 724  * @destnode: the destination node (see below)
 725  * @callback: the callback when ctdb replies to our message (typesafe)
 726  * @cbdata: the argument to callback()
 727  *
 728  * There are several special values for destnode, detailed in
 729  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 730  * local ctdbd.
 731  */
 732 struct ctdb_request *
 733 ctdb_getrecmaster_send(struct ctdb_connection *ctdb,
 734                         uint32_t destnode,
 735                         ctdb_callback_t callback, void *cbdata);
 736
 737 /**
 738  * ctdb_getrecmaster_recv - read an ctdb_getrecmaster reply from ctdbd
 739  * @ctdb: the ctdb_connection from ctdb_connect.
 740  * @req: the completed request.
 741  * @recmaster: a pointer to the recmaster to fill in
 742  *
 743  * This returns false if something went wrong, or otherwise fills in
 744  * recmaster.
 745  */
 746 bool ctdb_getrecmaster_recv(struct ctdb_connection *ctdb,
 747                             struct ctdb_request *handle,
 748                             uint32_t *recmaster);
 749
 750 /**
 751  * ctdb_getrecmode_send - read the recovery mode of a node
 752  * @ctdb: the ctdb_connection from ctdb_connect.
 753  * @destnode: the destination node (see below)
 754  * @callback: the callback when ctdb replies to our message (typesafe)
 755  * @cbdata: the argument to callback()
 756  *
 757  * There are several special values for destnode, detailed in
 758  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 759  * local ctdbd.
 760  */
 761 struct ctdb_request *
 762 ctdb_getrecmode_send(struct ctdb_connection *ctdb,
 763                      uint32_t destnode,
 764                      ctdb_callback_t callback, void *cbdata);
 765
 766 /**
 767  * ctdb_getrecmode_recv - read an ctdb_getrecmode reply from ctdbd
 768  * @ctdb: the ctdb_connection from ctdb_connect.
 769  * @req: the completed request.
 770  * @recmode: a pointer to the recmode to fill in
 771  *
 772  * This returns false if something went wrong, or otherwise fills in
 773  * recmode.
 774  */
 775 bool ctdb_getrecmode_recv(struct ctdb_connection *ctdb,
 776                           struct ctdb_request *handle,
 777                           uint32_t *recmode);
 778
 779 /**
 780  * ctdb_getvnnmap_send - read the vnn map from a node.
 781  * @ctdb: the ctdb_connection from ctdb_connect.
 782  * @destnode: the destination node (see below)
 783  * @callback: the callback when ctdb replies to our message (typesafe)
 784  * @cbdata: the argument to callback()
 785  *
 786  * There are several special values for destnode, detailed in
 787  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 788  * local ctdbd.
 789  */
 790 struct ctdb_request *
 791 ctdb_getvnnmap_send(struct ctdb_connection *ctdb,
 792                     uint32_t destnode,
 793                     ctdb_callback_t callback,
 794                     void *cbdata);
 795 /**
 796  * ctdb_getvnnmap_recv - read an ctdb_getvnnmap reply from ctdbd
 797  * @ctdb: the ctdb_connection from ctdb_connect.
 798  * @req: the completed request.
 799  * @vnnmap: the list of interfaces
 800  *
 801  * This returns false if something went wrong.
 802  * If the command failed, it guarantees to set vnnmap to NULL.
 803  * A non-NULL value for vnnmap means the command was successful.
 804  *
 805  * A non-NULL value of the vnnmap must be released/freed
 806  * by ctdb_free_vnnmap().
 807  */
 808 bool ctdb_getvnnmap_recv(struct ctdb_connection *ctdb,
 809                          struct ctdb_request *req, struct ctdb_vnn_map **vnnmap);
 810
 811 /**
 812  * ctdb_cancel - cancel an uncompleted request
 813  * @ctdb: the ctdb_connection from ctdb_connect.
 814  * @req: the uncompleted request.
 815  *
 816  * This cancels a request, returning true.  You may not cancel a
 817  * request which has already been completed (ie. once its callback has
 818  * been called); you should simply use ctdb_request_free() in that case.
 819  */
 820 void ctdb_cancel(struct ctdb_connection *ctdb, struct ctdb_request *req);
 821
 822 /***
 823  *
 824  *  Synchronous API
 825  *
 826  ***/
 827
 828 /**
 829  * ctdb_attachdb - open a clustered TDB (synchronous)
 830  * @ctdb: the ctdb_connection from ctdb_connect.
 831  * @name: the filename of the database (no /).
 832  * @persistent: whether the database is persistent across ctdbd's life
 833  * @tdb_flags: the flags to pass to tdb_open.
 834  *
 835  * Do a ctdb_attachdb_send and wait for it to complete.
 836  * Returns NULL on failure.
 837  */
 838 struct ctdb_db *ctdb_attachdb(struct ctdb_connection *ctdb,
 839                               const char *name, bool persistent,
 840                               uint32_t tdb_flags);
 841
 842 /**
 843  * ctdb_detachdb - close a clustered TDB.
 844  * @ctdb: the ctdb_connection from ctdb_connect.
 845  * @db: the database from ctdb_attachdb/ctdb_attachdb_send
 846  *
 847  * Closes a clustered tdb.
 848  */
 849 void ctdb_detachdb(struct ctdb_connection *ctdb, struct ctdb_db *db);
 850
 851 /**
 852  * ctdb_readrecordlock - read and lock a record (synchronous)
 853  * @ctdb: the ctdb_connection from ctdb_connect.
 854  * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv.
 855  * @key: the key of the record to lock.
 856  * @req: a pointer to the request, if one is needed.
 857  *
 858  * Do a ctdb_readrecordlock_send and wait for it to complete.
 859  * Returns NULL on failure.
 860  */
 861 struct ctdb_lock *ctdb_readrecordlock(struct ctdb_connection *ctdb,
 862                                       struct ctdb_db *ctdb_db, TDB_DATA key,
 863                                       TDB_DATA *data);
 864
 865
 866 /**
 867  * ctdb_set_message_handler - register for messages to a srvid (synchronous)
 868  * @ctdb: the ctdb_connection from ctdb_connect.
 869  * @srvid: the 64 bit identifier for our messages.
 870  * @handler: the callback when we receive such a message (typesafe)
 871  * @cbdata: the argument to handler()
 872  *
 873  * If this returns true, the message handler can be called from any
 874  * ctdb_service() (which is also called indirectly by other
 875  * synchronous functions).  If this returns false, the registration
 876  * failed.
 877  */
 878 bool ctdb_set_message_handler(struct ctdb_connection *ctdb, uint64_t srvid,
 879                               ctdb_message_fn_t handler, void *cbdata);
 880
 881
 882 /**
 883  * ctdb_remove_message_handler - deregister for messages (synchronous)
 884  * @ctdb: the ctdb_connection from ctdb_connect.
 885  * @srvid: the 64 bit identifier for our messages.
 886  * @handler: the callback when we receive such a message (typesafe)
 887  * @handler_data: the argument to handler()
 888  *
 889  * If this returns true, the message handler will no longer be called.
 890  * If this returns false, the deregistration failed.
 891  */
 892 bool ctdb_remove_message_handler(struct ctdb_connection *ctdb, uint64_t srvid,
 893                                  ctdb_message_fn_t handler, void *handler_data);
 894
 895 /**
 896  * ctdb_getpnn - read the pnn number of a node (synchronous)
 897  * @ctdb: the ctdb_connection from ctdb_connect.
 898  * @destnode: the destination node (see below)
 899  * @pnn: a pointer to the pnn to fill in
 900  *
 901  * There are several special values for destnode, detailed in
 902  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 903  * local ctdbd.
 904  *
 905  * Returns true and fills in *pnn on success.
 906  */
 907 bool ctdb_getpnn(struct ctdb_connection *ctdb,
 908                  uint32_t destnode,
 909                  uint32_t *pnn);
 910
 911 /**
 912  * ctdb_getdbstat - read the db stat of a node (synchronous)
 913  * @ctdb: the ctdb_connection from ctdb_connect.
 914  * @destnode: the destination node (see below)
 915  * @db_id:    the database to collect the statistics from
 916  * @stat: a pointer to the *stat to fill in
 917  *
 918  * There are several special values for destnode, detailed in
 919  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 920  * local ctdbd.
 921  *
 922  * This returns false if something went wrong, or otherwise fills in **stat
 923  * stat must be freed later by calling ctdb_free_dbstat();
 924  */
 925 bool ctdb_getdbstat(struct ctdb_connection *ctdb,
 926                     uint32_t destnode,
 927                     uint32_t db_id,
 928                     struct ctdb_db_statistics **stat);
 929
 930
 931 /**
 932  * ctdb_check_message_handlers - check a list of message_handlers (synchronous)
 933  * @ctdb: the ctdb_connection from ctdb_connect.
 934  * @destnode: the destination node (see below)
 935  * @num: number of srvids to check
 936  * @mhs: @num message_handlers to check
 937  * @result: an array of @num uint8_t fields containing the result of the check
 938  *     0: message_handler does not exist
 939  *     1: message_handler exists
 940  *
 941  * There are several special values for destnode, detailed in
 942  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 943  * local ctdbd.
 944  */
 945 bool
 946 ctdb_check_message_handlers(struct ctdb_connection *ctdb,
 947                            uint32_t destnode,
 948                            uint32_t num,
 949                            uint64_t *mhs,
 950                            uint8_t *result);
 951
 952 /**
 953  * ctdb_getdbseqnum - read the seqnum of a database
 954  * @ctdb: the ctdb_connection from ctdb_connect.
 955  * @destnode: the destination node (see below)
 956  * @dbid: database id
 957  * @seqnum: sequence number for the database
 958  *
 959  * There are several special values for destnode, detailed in
 960  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 961  * local ctdbd.
 962  *
 963  * Returns true and fills in *pnn on success.
 964  */
 965 bool
 966 ctdb_getdbseqnum(struct ctdb_connection *ctdb,
 967                  uint32_t destnode,
 968                  uint32_t dbid,
 969                  uint64_t *seqnum);
 970
 971 /**
 972  * ctdb_getrecmaster - read the recovery master of a node (synchronous)
 973  * @ctdb: the ctdb_connection from ctdb_connect.
 974  * @destnode: the destination node (see below)
 975  * @recmaster: a pointer to the recmaster to fill in
 976  *
 977  * There are several special values for destnode, detailed in
 978  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 979  * local ctdbd.
 980  *
 981  * Returns true and fills in *recmaster on success.
 982  */
 983 bool ctdb_getrecmaster(struct ctdb_connection *ctdb,
 984                        uint32_t destnode,
 985                        uint32_t *recmaster);
 986
 987
 988 /**
 989  * ctdb_getrecmode - read the recovery mode of a node (synchronous)
 990  * @ctdb: the ctdb_connection from ctdb_connect.
 991  * @destnode: the destination node (see below)
 992  * @recmode: a pointer to the recmode to fill in
 993  *
 994  * There are several special values for destnode, detailed in
 995  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
 996  * local ctdbd.
 997  *
 998  * Returns true and fills in *recmode on success.
 999  */
1000 bool ctdb_getrecmode(struct ctdb_connection *ctdb,
1001                      uint32_t destnode,
1002                      uint32_t *recmode);
1003
1004
1005 /**
1006  * ctdb_getnodemap - read the nodemap from a node (synchronous)
1007  * @ctdb: the ctdb_connection from ctdb_connect.
1008  * @destnode: the destination node (see below)
1009  * @nodemap: a pointer to the nodemap to fill in
1010  *
1011  * There are several special values for destnode, detailed in
1012  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
1013  * local ctdbd.
1014  *
1015  * Returns true and fills in *nodemap on success.
1016  * A non-NULL nodemap must be freed by calling ctdb_free_nodemap.
1017  */
1018 bool ctdb_getnodemap(struct ctdb_connection *ctdb,
1019                      uint32_t destnode, struct ctdb_node_map **nodemap);
1020
1021 /**
1022  * ctdb_getifaces - read the list of interfaces from a node (synchronous)
1023  * @ctdb: the ctdb_connection from ctdb_connect.
1024  * @destnode: the destination node (see below)
1025  * @ifaces: a pointer to the ifaces to fill in
1026  *
1027  * There are several special values for destnode, detailed in
1028  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
1029  * local ctdbd.
1030  *
1031  * Returns true and fills in *ifaces on success.
1032  * A non-NULL value of the ifaces must be release released/freed
1033  * by ctdb_free_ifaces().
1034  */
1035 bool ctdb_getifaces(struct ctdb_connection *ctdb,
1036                     uint32_t destnode, struct ctdb_ifaces_list **ifaces);
1037
1038 /*
1039  * This function is used to release/free the nodemap structure returned
1040  * by ctdb_getnodemap() and ctdb_getnodemap_recv()
1041  */
1042 void ctdb_free_nodemap(struct ctdb_node_map *nodemap);
1043
1044
1045 /**
1046  * ctdb_getpublicips - read the public ip list from a node.
1047  * @ctdb: the ctdb_connection from ctdb_connect.
1048  * @destnode: the destination node (see below)
1049  * @ips: a pointer to the returned public ip list
1050  *
1051  * This control returns the list of public ips known to the local node.
1052  * Deamons only know about those ips that are listed in the local
1053  * public addresses file, which means the returned list of ips may
1054  * be only a subset of all ips across the entire cluster.
1055  *
1056  * There are several special values for destnode, detailed in
1057  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
1058  * local ctdbd.
1059  *
1060  * This returns false if something went wrong.
1061  * If the command failed, it guarantees to set ips to NULL.
1062  * A non-NULL value for nodemap means the command was successful.
1063  *
1064  * A non-NULL value of the nodemap must be release released/freed
1065  * by ctdb_free_publicips().
1066  */
1067 bool ctdb_getpublicips(struct ctdb_connection *ctdb,
1068                      uint32_t destnode, struct ctdb_all_public_ips **ips);
1069
1070 /*
1071  * This function is used to release/free the public ip structure returned
1072  * by ctdb_getpublicips() and ctdb_getpublicips_recv()
1073  */
1074 void ctdb_free_publicips(struct ctdb_all_public_ips *ips);
1075
1076
1077 /**
1078  * ctdb_getvnnmap - read the vnn map from a node (synchronous)
1079  * @ctdb: the ctdb_connection from ctdb_connect.
1080  * @destnode: the destination node (see below)
1081  * @vnnmap: a pointer to the vnnmap to fill in
1082  *
1083  * There are several special values for destnode, detailed in
1084  * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the
1085  * local ctdbd.
1086  *
1087  * Returns true and fills in *vnnmap on success.
1088  * A non-NULL value of the vnnmap must be  released/freed
1089  * by ctdb_free_vnnmap().
1090  */
1091 bool ctdb_getvnnmap(struct ctdb_connection *ctdb,
1092                     uint32_t destnode, struct ctdb_vnn_map **vnnmap);
1093
1094 /*
1095  * This function is used to release/free the vnnmap structure returned
1096  * by ctdb_getvnnmap() and ctdb_getvnnmap_recv()
1097  */
1098 void ctdb_free_vnnmap(struct ctdb_vnn_map *vnnmap);
1099
1100 /* These ugly macro wrappers make the callbacks typesafe. */
1101 #include <ctdb_typesafe_cb.h>
1102 #define ctdb_sendcb(cb, cbdata)                                         \
1103          typesafe_cb_preargs(void, (cb), (cbdata),                      \
1104                              struct ctdb_connection *, struct ctdb_request *)
1105
1106 #define ctdb_msgcb(cb, cbdata)                                          \
1107         typesafe_cb_preargs(void, (cb), (cbdata),                       \
1108                             struct ctdb_connection *, uint64_t, TDB_DATA)
1109
1110 #define ctdb_connect(addr, log, logpriv)                                \
1111         ctdb_connect((addr),                                            \
1112                      typesafe_cb_postargs(void, (log), (logpriv),       \
1113                                           int, const char *, va_list),  \
1114                      (logpriv))
1115
1116 #define ctdb_set_message_handler(ctdb, srvid, handler, hdata)           \
1117         ctdb_set_message_handler((ctdb), (srvid),                       \
1118                                  ctdb_msgcb((handler), (hdata)), (hdata))
1119
1120 #define ctdb_remove_message_handler(ctdb, srvid, handler, hdata)        \
1121         ctdb_remove_message_handler((ctdb), (srvid),                    \
1122                                     ctdb_msgcb((handler), (hdata)), (hdata))
1123
1124 #define ctdb_attachdb_send(ctdb, name, persistent, tdb_flags, cb, cbdata) \
1125         ctdb_attachdb_send((ctdb), (name), (persistent), (tdb_flags),   \
1126                            ctdb_sendcb((cb), (cbdata)), (cbdata))
1127
1128 #define ctdb_readrecordlock_async(_ctdb_db, key, cb, cbdata)            \
1129         ctdb_readrecordlock_async((_ctdb_db), (key),                    \
1130                 typesafe_cb_preargs(void, (cb), (cbdata),               \
1131                                     struct ctdb_db *, struct ctdb_lock *, \
1132                                     TDB_DATA), (cbdata))
1133
1134 #define ctdb_set_message_handler_send(ctdb, srvid, handler, hdata, cb, cbdata) \
1135         ctdb_set_message_handler_send((ctdb), (srvid),                  \
1136                                       ctdb_msgcb((handler), (hdata)), (hdata), \
1137                                       ctdb_sendcb((cb), (cbdata)), (cbdata))
1138
1139 #define ctdb_remove_message_handler_send(ctdb, srvid, handler, hdata, cb, cbdata) \
1140         ctdb_remove_message_handler_send((ctdb), (srvid),               \
1141               ctdb_msgcb((handler), (hdata)), (hdata),                  \
1142               ctdb_sendcb((cb), (cbdata)), (cbdata))
1143
1144 #define ctdb_getpnn_send(ctdb, destnode, cb, cbdata)                    \
1145         ctdb_getpnn_send((ctdb), (destnode),                            \
1146                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1147
1148 #define ctdb_getdbstat_send(ctdb, destnode, db_id, cb, cbdata)          \
1149         ctdb_getdbstat_send((ctdb), (destnode), (db_id),                \
1150                             ctdb_sendcb((cb), (cbdata)), (cbdata))
1151
1152 #define ctdb_check_message_handlers_send(ctdb, destnode, num, mhs,      \
1153                          cb, cbdata)                                    \
1154         ctdb_check_message_handlers_send((ctdb), (destnode), (num),     \
1155                          (mhs),                                         \
1156                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1157
1158 #define ctdb_getrecmaster_send(ctdb, destnode, cb, cbdata)              \
1159         ctdb_getrecmaster_send((ctdb), (destnode),                      \
1160                                ctdb_sendcb((cb), (cbdata)), (cbdata))
1161
1162 #define ctdb_getrecmode_send(ctdb, destnode, cb, cbdata)                \
1163         ctdb_getrecmode_send((ctdb), (destnode),                        \
1164                                ctdb_sendcb((cb), (cbdata)), (cbdata))
1165
1166 #define ctdb_getnodemap_send(ctdb, destnode, cb, cbdata)                \
1167         ctdb_getnodemap_send((ctdb), (destnode),                        \
1168                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1169
1170 #define ctdb_getpublicips_send(ctdb, destnode, cb, cbdata)              \
1171         ctdb_getpublicips_send((ctdb), (destnode),                      \
1172                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1173
1174 #define ctdb_getdbseqnum_send(ctdb, destnode, dbid, cb, cbdata)         \
1175         ctdb_getdbseqnum_send((ctdb), (destnode), (dbid),               \
1176                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1177
1178 #define ctdb_getifaces_send(ctdb, destnode, cb, cbdata)                 \
1179         ctdb_getifaces_send((ctdb), (destnode),                         \
1180                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1181
1182 #define ctdb_getvnnmap_send(ctdb, destnode, cb, cbdata)                 \
1183         ctdb_getvnnmap_send((ctdb), (destnode),                         \
1184                          ctdb_sendcb((cb), (cbdata)), (cbdata))
1185
1186 #endif