diff options
Diffstat (limited to 'ctdb/include')
| -rw-r--r-- | ctdb/include/ctdb.h | 1186 | ||||
| -rw-r--r-- | ctdb/include/ctdb_client.h | 630 | ||||
| -rw-r--r-- | ctdb/include/ctdb_private.h | 1502 | ||||
| -rw-r--r-- | ctdb/include/ctdb_protocol.h | 741 | ||||
| -rw-r--r-- | ctdb/include/ctdb_typesafe_cb.h | 177 |
5 files changed, 4236 insertions, 0 deletions
diff --git a/ctdb/include/ctdb.h b/ctdb/include/ctdb.h new file mode 100644 index 0000000000..93224cbdaa --- /dev/null +++ b/ctdb/include/ctdb.h @@ -0,0 +1,1186 @@ +/* + ctdb database library + + Copyright (C) Ronnie sahlberg 2010 + Copyright (C) Rusty Russell 2010 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CTDB_H +#define _CTDB_H +#include <sys/types.h> +#include <stdint.h> +#include <stdbool.h> +#include <stdarg.h> +#include <stdio.h> +#include <tdb.h> +#include <netinet/in.h> +#include <ctdb_protocol.h> + +/** + * ctdb - a library for accessing tdbs controlled by ctdbd + * + * ctdbd (clustered tdb daemon) is a daemon designed to syncronize TDB + * databases across a cluster. Using this library, you can communicate with + * the daemon to access the databases, pass messages across the cluster, and + * control the daemon itself. + * + * The general API is event-driven and asynchronous: you call the + * *_send functions, supplying callbacks, then when the ctdbd file + * descriptor is usable, call ctdb_service() to perform read from it + * and call your callbacks, which use the *_recv functions to unpack + * the replies from ctdbd. + * + * There is also a synchronous wrapper for each function for trivial + * programs; these can be found in the section marked "Synchronous API". + */ + +/** + * ctdb_log_fn_t - logging function for ctdbd + * @log_priv: private (typesafe) arg via ctdb_connect + * @severity: syslog-style severity + * @format: printf-style format string. + * @ap: arguments for formatting. + * + * The severity passed to log() are as per syslog(3). In particular, + * LOG_DEBUG is used for tracing, LOG_WARNING is used for unusual + * conditions which don't necessarily return an error through the API, + * LOG_ERR is used for errors such as lost communication with ctdbd or + * out-of-memory, LOG_ALERT is used for library usage bugs, LOG_CRIT is + * used for libctdb internal consistency checks. + * + * The log() function can be typesafe: the @log_priv arg to + * ctdb_donnect and signature of log() should match. + */ +typedef void (*ctdb_log_fn_t)(void *log_priv, + int severity, const char *format, va_list ap); + +/** + * ctdb_connect - connect to ctdb using the specified domain socket. + * @addr: the socket address, or NULL for default + * @log: the logging function + * @log_priv: the private argument to the logging function. + * + * Returns a ctdb context if successful or NULL. Use ctdb_disconnect() to + * release the returned ctdb_connection when finished. + * + * See Also: + * ctdb_log_fn_t, ctdb_log_file() + */ +struct ctdb_connection *ctdb_connect(const char *addr, + ctdb_log_fn_t log_fn, void *log_priv); + +/** + * ctdb_log_file - example logging function + * + * Logs everything at priority LOG_WARNING or above to the file given (via + * the log_priv argument, usually stderr). + */ +void ctdb_log_file(FILE *, int, const char *, va_list); + +/** + * ctdb_log_level - level at which to call logging function + * + * This variable globally controls filtering on the logging function. + * It is initialized to LOG_WARNING, meaning that strange but nonfatal + * events, as well as errors and API misuses are reported. + * + * Set it to LOG_DEBUG to receive all messages. + */ +extern int ctdb_log_level; + +/** + * ctdb_disconnect - close down a connection to ctdbd. + * @ctdb: the ctdb connectio returned from ctdb_connect. + * + * The @ctdb arg will be freed by this call, and must not be used again. + */ +void ctdb_disconnect(struct ctdb_connection *ctdb); + +/*** + * + * Asynchronous API + * + ***/ + +/** + * ctdb_num_active - get the number of active commands + * @ctdb: the ctdb_connection from ctdb_connect. + * + * This command can be used to find the number of active commands we have + * issued. An active command is a command we have queued, or sent + * to the ctdb daemon but which we have not yet received a reply to. + * + * See Also: + * ctdb_num_in_flight(), ctdb_num_out_queue() + */ +int ctdb_num_active(struct ctdb_connection *ctdb); + +/** + * ctdb_num_in_flight - get the number of commands in flight. + * @ctdb: the ctdb_connection from ctdb_connect. + * + * This command can be used to find the number of commands we have + * sent to the ctdb daemon to which we have not yet received/processed + * the reply. + * + * See Also: + * ctdb_num_out_queue(), ctdb_num_active() + */ +int ctdb_num_in_flight(struct ctdb_connection *ctdb); + +/** + * ctdb_num_out_queue - get the number of commands in the out queue + * @ctdb: the ctdb_connection from ctdb_connect. + * + * This command can be used to find the number of commands we have + * queued for delivery to the ctdb daemon but have not yet been + * written to the domain socket. + * + * See Also: + * ctdb_num_in_flight(), ctdb_num_active() + */ +int ctdb_num_out_queue(struct ctdb_connection *ctdb); + +/** + * ctdb_get_fd - get the filedescriptor to select/poll on + * @ctdb: the ctdb_connection from ctdb_connect. + * + * By using poll or select on this file descriptor, you will know when to call + * ctdb_service(). + * + * See Also: + * ctdb_which_events(), ctdb_service() + */ +int ctdb_get_fd(struct ctdb_connection *ctdb); + +/** + * ctdb_which_events - determine which events ctdb_service wants to see + * @ctdb: the ctdb_connection from ctdb_connect. + * + * This returns POLLIN, possibly or'd with POLLOUT if there are writes + * pending. You can set this straight into poll.events. + * + * See Also: + * ctdb_service() + */ +int ctdb_which_events(struct ctdb_connection *ctdb); + +/** + * ctdb_service - service any I/O and callbacks from ctdbd communication + * @ctdb: the ctdb_connection from ctdb_connect. + * @revents: which events are available. + * + * This is the core of the library: it read and writes to the ctdbd + * socket. It may call callbacks registered with the various _send + * functions. + * + * revents is a bitset: POLLIN and/or POLLOUT may be set to indicate + * it is worth attempting to read/write the (nonblocking) + * filedescriptor respectively. + * + * Note that the synchronous functions call this internally. + * Returns false on catastrophic failure. + */ +bool ctdb_service(struct ctdb_connection *ctdb, int revents); + +/** + * struct ctdb_request - handle for an outstanding request + * + * This opaque structure returned from various *_send functions gives + * you a handle by which you can cancel a request. You can't do + * anything else with it until the request is completed and it is + * handed to your callback function. + */ +struct ctdb_request; + +/** + * ctdb_request_free - free a completed request + * + * This frees a request: you should only call it once it has been + * handed to your callback. For incomplete requests, see ctdb_cancel(). + */ +void ctdb_request_free(struct ctdb_request *req); + +/** + * ctdb_callback_t - callback for completed requests. + * + * This would normally unpack the request using ctdb_*_recv(). You + * must free the request using ctdb_request_free(). + * + * Note that due to macro magic, actual your callback can be typesafe: + * instead of taking a void *, it can take a type which matches the + * actual private parameter. + */ +typedef void (*ctdb_callback_t)(struct ctdb_connection *ctdb, + struct ctdb_request *req, void *private_data); + +/** + * struct ctdb_db - connection to a particular open TDB + * + * This represents a particular open database: you receive it from + * ctdb_attachdb or ctdb_attachdb_recv to manipulate a database. + * + * You have to free the handle with ctdb_detachdb() when finished with it. + */ +struct ctdb_db; + +/** + * ctdb_attachdb_send - open a clustered TDB + * @ctdb: the ctdb_connection from ctdb_connect. + * @name: the filename of the database (no /). + * @persistent: whether the database is persistent across ctdbd's life + * @tdb_flags: the flags to pass to tdb_open. + * @callback: the callback when we're attached or failed (typesafe) + * @cbdata: the argument to callback() + * + * This function connects to a TDB controlled by ctdbd. It can create + * a new TDB if it does not exist, depending on tdb_flags. Returns + * the pending request, or NULL on error. + */ +struct ctdb_request * +ctdb_attachdb_send(struct ctdb_connection *ctdb, + const char *name, bool persistent, uint32_t tdb_flags, + ctdb_callback_t callback, void *cbdata); + +/** + * ctdb_attachdb_recv - read an ctdb_attach reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * + * This returns NULL if something went wrong, or otherwise the open database. + */ +struct ctdb_db *ctdb_attachdb_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req); + + +/** + * struct ctdb_lock - a record lock on a clustered TDB database + * + * This locks a subset of the database across the entire cluster; it + * is the fundamental sychronization element for ctdb. You cannot have + * more than one lock at once. + * + * You MUST NOT block during holding this lock and MUST release it + * quickly by performing ctdb_release_lock(lock). + * Do NOT make any system calls that may block while holding the lock. + * + * Try to release the lock as quickly as possible. + */ +struct ctdb_lock; + +/** + * ctdb_rrl_callback_t - callback for ctdb_readrecordlock_async + * + * This is not the standard ctdb_callback_t, because there is often no + * request required to access a database record (ie. if it is local already). + * So the callback is handed the lock directly: it might be NULL if there + * was an error obtaining the lock. + * + * See Also: + * ctdb_readrecordlock_async(), ctdb_readrecordlock() + */ +typedef void (*ctdb_rrl_callback_t)(struct ctdb_db *ctdb_db, + struct ctdb_lock *lock, + TDB_DATA data, + void *private_data); + +/** + * ctdb_readrecordlock_async - read and lock a record + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @key: the key of the record to lock. + * @callback: the callback once the record is locked (typesafe). + * @cbdata: the argument to callback() + * + * This returns true on success. Commonly, we can obtain the record + * immediately and so the callback will be invoked. Otherwise a request + * will be queued to ctdbd for the record. + * + * If failure is immediate, false is returned. Otherwise, the callback + * may receive a NULL lock arg to indicate asynchronous failure. + */ +bool ctdb_readrecordlock_async(struct ctdb_db *ctdb_db, TDB_DATA key, + ctdb_rrl_callback_t callback, void *cbdata); + +/** + * ctdb_readonlyrecordlock_async - read and lock a record for read-only access + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @key: the key of the record to lock. + * @callback: the callback once the record is locked (typesafe). + * @cbdata: the argument to callback() + * + * This returns true on success. Commonly, we can obtain the record + * immediately and so the callback will be invoked. Otherwise a request + * will be queued to ctdbd for the record. + * + * If failure is immediate, false is returned. Otherwise, the callback + * may receive a NULL lock arg to indicate asynchronous failure. + */ +bool ctdb_readonlyrecordlock_async(struct ctdb_db *ctdb_db, TDB_DATA key, + ctdb_rrl_callback_t callback, void *cbdata); + + +/** + * ctdb_writerecord - write a locked record in a TDB + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @lock: the lock from ctdb_readrecordlock/ctdb_readrecordlock_recv + * @data: the new data to place in the record. + */ +bool ctdb_writerecord(struct ctdb_db *ctdb_db, + struct ctdb_lock *lock, TDB_DATA data); + +/** + * ctdb_release_lock - release a record lock on a TDB + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @lock: the lock from ctdb_readrecordlock/ctdb_readrecordlock_async + */ +void ctdb_release_lock(struct ctdb_db *ctdb_db, struct ctdb_lock *lock); + + + +/** + * ctdb_traverse_callback_t - callback for ctdb_traverse_async. + * return 0 - to continue traverse + * return 1 - to abort the traverse + * + * See Also: + * ctdb_traverse_async() + */ +#define TRAVERSE_STATUS_RECORD 0 +#define TRAVERSE_STATUS_FINISHED 1 +#define TRAVERSE_STATUS_ERROR 2 +typedef int (*ctdb_traverse_callback_t)(struct ctdb_connection *ctdb, + struct ctdb_db *ctdb_db, + int status, + TDB_DATA key, + TDB_DATA data, + void *private_data); + +/** + * ctdb_traverse_async - traverse a database. + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @callback: the callback once the record is locked (typesafe). + * @cbdata: the argument to callback() + * + * This returns true on success. + * when successfull, the callback will be invoked for each record + * until the traversal is finished. + * + * status == + * TRAVERSE_STATUS_RECORD key/data contains a record. + * TRAVERSE_STATUS_FINISHED traverse is finished. key/data is undefined. + * TRAVERSE_STATUS_ERROR an error occured during traverse. + * key/data is undefined. + * + * If failure is immediate, false is returned. + */ +bool ctdb_traverse_async(struct ctdb_db *ctdb_db, + ctdb_traverse_callback_t callback, void *cbdata); + +/** + * ctdb_message_fn_t - messaging callback for ctdb messages + * + * ctdbd provides a simple messaging API; you can register for a particular + * 64-bit id on which you want to send messages, and send to other ids. + * + * See Also: + * ctdb_set_message_handler_send() + */ +typedef void (*ctdb_message_fn_t)(struct ctdb_connection *, + uint64_t srvid, TDB_DATA data, void *); + +/** + * ctdb_set_message_handler_send - register for messages to a srvid + * @ctdb: the ctdb_connection from ctdb_connect. + * @srvid: the 64 bit identifier for our messages. + * @handler: the callback when we receive such a message (typesafe) + * @handler_data: the argument to handler() + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * Note: our callback will always be called before handler. + * + * See Also: + * ctdb_set_message_handler_recv(), ctdb_remove_message_handler_send() + */ +struct ctdb_request * +ctdb_set_message_handler_send(struct ctdb_connection *ctdb, uint64_t srvid, + ctdb_message_fn_t handler, + void *handler_data, + ctdb_callback_t callback, + void *cbdata); + +/** + * ctdb_set_message_handler_recv - read a set_message_handler result + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request + * + * If this returns true, the registered handler may be called from the next + * ctdb_service(). If this returns false, the registration failed. + */ +bool ctdb_set_message_handler_recv(struct ctdb_connection *ctdb, + struct ctdb_request *handle); + +/** + * ctdb_remove_message_handler_send - unregister for messages to a srvid + * @ctdb: the ctdb_connection from ctdb_connect. + * @srvid: the 64 bit identifier for our messages. + * @handler: the callback when we receive such a message (typesafe) + * @handler_data: the argument to handler() + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * This undoes a successful ctdb_set_message_handler or + * ctdb_set_message_handler_recv. + */ +struct ctdb_request * +ctdb_remove_message_handler_send(struct ctdb_connection *ctdb, uint64_t srvid, + ctdb_message_fn_t handler, void *handler_data, + ctdb_callback_t callback, void *cbdata); + +/** + * ctdb_remove_message_handler_recv - read a remove_message_handler result + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request + * + * After this returns true, the registered handler will no longer be called. + * If this returns false, the de-registration failed. + */ +bool ctdb_remove_message_handler_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req); + + +/** + * ctdb_send_message - send a message via ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @pnn: the physical node number to send to + * @srvid: the 64 bit identifier for this message type. + * @data: the data to send + * + * This allows arbitrary messages to be sent across the cluster to those + * listening (via ctdb_set_message_handler et al). + * + * This queues a message to be sent: you will need to call + * ctdb_service() to actually send the message. There is no callback + * because there is no acknowledgement. + * + * See Also: + * ctdb_getpnn_send(), ctdb_getpnn() + */ +bool ctdb_send_message(struct ctdb_connection *ctdb, uint32_t pnn, uint64_t srvid, TDB_DATA data); + +/** + * ctdb_getpnn_send - read the pnn number of a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getpnn_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getpnn_recv - read an ctdb_getpnn reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @pnn: a pointer to the pnn to fill in + * + * This returns false if something went wrong, or otherwise fills in pnn. + */ +bool ctdb_getpnn_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, uint32_t *pnn); + + +/** + * ctdb_getdbstat_send - read statistics for a db + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @db_id: the database to collect the statistics from + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getdbstat_send(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t db_id, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getdbstat_recv - read an ctdb_getdbstat reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @stat: a pointer to the *stat to fill in + * + * This returns false if something went wrong, or otherwise fills in **stats + * stats must be freed later by calling ctdb_free_dbstat(); + */ +bool ctdb_getdbstat_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, + struct ctdb_db_statistics **stat); + +void ctdb_free_dbstat(struct ctdb_db_statistics *stat); + +/** + * ctdb_check_message_handlers_send - check a list of message_handlers + * if they are registered + * message_handlers are registered on the daemon using the + * ctdb_set_message_handler_send() call + * + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @num: number of srvids to check + * @mhs: @num message_handlers values to check + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_check_message_handlers_send(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t num, + uint64_t *mhs, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_check_message_handlers_recv - read a ctdb_check_message_handlers + * reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @num: number of message_handlers to check + * @result: an array of @num uint8_t fields containing the result of the check + * 0: message_handler does not exist + * 1: message_handler exists + * + * This returns false if something went wrong, or otherwise fills in result. + */ +bool +ctdb_check_message_handlers_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, uint32_t num, + uint8_t *result); + + +/** + * ctdb_getdbseqnum_send - read the sequence number off a db + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @dbid: database id + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getdbseqnum_send(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t dbid, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getdbseqnum_recv - read the sequence number off a database + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @seqnum: a pointer to the seqnum to fill in + * + * This returns false if something went wrong, or otherwise fills in pnn. + */ +bool ctdb_getdbseqnum_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, uint64_t *seqnum); + +/** + * ctdb_getnodemap_send - read the nodemap number from a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getnodemap_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getnodemap_recv - read an ctdb_getnodemap reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @nodemap: a pointer to the returned nodemap structure + * + * This returns false if something went wrong. + * If the command failed, it guarantees to set nodemap to NULL. + * A non-NULL value for nodemap means the command was successful. + * + * A non-NULL value of the nodemap must be release released/freed + * by ctdb_free_nodemap(). + */ +bool ctdb_getnodemap_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, struct ctdb_node_map **nodemap); + +/** + * ctdb_getifaces_send - read the list of interfaces from a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getifaces_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getifaces_recv - read an ctdb_getifaces reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @ifaces: the list of interfaces + * + * This returns false if something went wrong. + * If the command failed, it guarantees to set ifaces to NULL. + * A non-NULL value for ifaces means the command was successful. + * + * A non-NULL value of the ifaces must be release released/freed + * by ctdb_free_ifaces(). + */ +bool ctdb_getifaces_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, struct ctdb_ifaces_list **ifaces); + +/* Free a datastructure returned by ctdb_getifaces[_recv] */ +void ctdb_free_ifaces(struct ctdb_ifaces_list *ifaces); + +/** + * ctdb_getpublicips_send - read the public ip list from a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * This control returns the list of public ips known to the local node. + * Deamons only know about those ips that are listed in the local + * public addresses file, which means the returned list of ips may + * be only a subset of all ips across the entire cluster. + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getpublicips_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getpublicips_recv - read the public ip list from a node + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @ips: a pointer to the returned public ip list + * + * This returns false if something went wrong. + * If the command failed, it guarantees to set ips to NULL. + * A non-NULL value for nodemap means the command was successful. + * + * A non-NULL value of the nodemap must be release released/freed + * by ctdb_free_publicips(). + */ +bool ctdb_getpublicips_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, struct ctdb_all_public_ips **ips); + + +/** + * ctdb_getrecmaster_send - read the recovery master of a node + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getrecmaster_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, void *cbdata); + +/** + * ctdb_getrecmaster_recv - read an ctdb_getrecmaster reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @recmaster: a pointer to the recmaster to fill in + * + * This returns false if something went wrong, or otherwise fills in + * recmaster. + */ +bool ctdb_getrecmaster_recv(struct ctdb_connection *ctdb, + struct ctdb_request *handle, + uint32_t *recmaster); + +/** + * ctdb_getrecmode_send - read the recovery mode of a node + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getrecmode_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, void *cbdata); + +/** + * ctdb_getrecmode_recv - read an ctdb_getrecmode reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @recmode: a pointer to the recmode to fill in + * + * This returns false if something went wrong, or otherwise fills in + * recmode. + */ +bool ctdb_getrecmode_recv(struct ctdb_connection *ctdb, + struct ctdb_request *handle, + uint32_t *recmode); + +/** + * ctdb_getvnnmap_send - read the vnn map from a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @callback: the callback when ctdb replies to our message (typesafe) + * @cbdata: the argument to callback() + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +struct ctdb_request * +ctdb_getvnnmap_send(struct ctdb_connection *ctdb, + uint32_t destnode, + ctdb_callback_t callback, + void *cbdata); +/** + * ctdb_getvnnmap_recv - read an ctdb_getvnnmap reply from ctdbd + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the completed request. + * @vnnmap: the list of interfaces + * + * This returns false if something went wrong. + * If the command failed, it guarantees to set vnnmap to NULL. + * A non-NULL value for vnnmap means the command was successful. + * + * A non-NULL value of the vnnmap must be released/freed + * by ctdb_free_vnnmap(). + */ +bool ctdb_getvnnmap_recv(struct ctdb_connection *ctdb, + struct ctdb_request *req, struct ctdb_vnn_map **vnnmap); + +/** + * ctdb_cancel - cancel an uncompleted request + * @ctdb: the ctdb_connection from ctdb_connect. + * @req: the uncompleted request. + * + * This cancels a request, returning true. You may not cancel a + * request which has already been completed (ie. once its callback has + * been called); you should simply use ctdb_request_free() in that case. + */ +void ctdb_cancel(struct ctdb_connection *ctdb, struct ctdb_request *req); + +/*** + * + * Synchronous API + * + ***/ + +/** + * ctdb_attachdb - open a clustered TDB (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @name: the filename of the database (no /). + * @persistent: whether the database is persistent across ctdbd's life + * @tdb_flags: the flags to pass to tdb_open. + * + * Do a ctdb_attachdb_send and wait for it to complete. + * Returns NULL on failure. + */ +struct ctdb_db *ctdb_attachdb(struct ctdb_connection *ctdb, + const char *name, bool persistent, + uint32_t tdb_flags); + +/** + * ctdb_detachdb - close a clustered TDB. + * @ctdb: the ctdb_connection from ctdb_connect. + * @db: the database from ctdb_attachdb/ctdb_attachdb_send + * + * Closes a clustered tdb. + */ +void ctdb_detachdb(struct ctdb_connection *ctdb, struct ctdb_db *db); + +/** + * ctdb_readrecordlock - read and lock a record (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @ctdb_db: the database handle from ctdb_attachdb/ctdb_attachdb_recv. + * @key: the key of the record to lock. + * @req: a pointer to the request, if one is needed. + * + * Do a ctdb_readrecordlock_send and wait for it to complete. + * Returns NULL on failure. + */ +struct ctdb_lock *ctdb_readrecordlock(struct ctdb_connection *ctdb, + struct ctdb_db *ctdb_db, TDB_DATA key, + TDB_DATA *data); + + +/** + * ctdb_set_message_handler - register for messages to a srvid (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @srvid: the 64 bit identifier for our messages. + * @handler: the callback when we receive such a message (typesafe) + * @cbdata: the argument to handler() + * + * If this returns true, the message handler can be called from any + * ctdb_service() (which is also called indirectly by other + * synchronous functions). If this returns false, the registration + * failed. + */ +bool ctdb_set_message_handler(struct ctdb_connection *ctdb, uint64_t srvid, + ctdb_message_fn_t handler, void *cbdata); + + +/** + * ctdb_remove_message_handler - deregister for messages (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @srvid: the 64 bit identifier for our messages. + * @handler: the callback when we receive such a message (typesafe) + * @handler_data: the argument to handler() + * + * If this returns true, the message handler will no longer be called. + * If this returns false, the deregistration failed. + */ +bool ctdb_remove_message_handler(struct ctdb_connection *ctdb, uint64_t srvid, + ctdb_message_fn_t handler, void *handler_data); + +/** + * ctdb_getpnn - read the pnn number of a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @pnn: a pointer to the pnn to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *pnn on success. + */ +bool ctdb_getpnn(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t *pnn); + +/** + * ctdb_getdbstat - read the db stat of a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @db_id: the database to collect the statistics from + * @stat: a pointer to the *stat to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * This returns false if something went wrong, or otherwise fills in **stat + * stat must be freed later by calling ctdb_free_dbstat(); + */ +bool ctdb_getdbstat(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t db_id, + struct ctdb_db_statistics **stat); + + +/** + * ctdb_check_message_handlers - check a list of message_handlers (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @num: number of srvids to check + * @mhs: @num message_handlers to check + * @result: an array of @num uint8_t fields containing the result of the check + * 0: message_handler does not exist + * 1: message_handler exists + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + */ +bool +ctdb_check_message_handlers(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t num, + uint64_t *mhs, + uint8_t *result); + +/** + * ctdb_getdbseqnum - read the seqnum of a database + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @dbid: database id + * @seqnum: sequence number for the database + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *pnn on success. + */ +bool +ctdb_getdbseqnum(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t dbid, + uint64_t *seqnum); + +/** + * ctdb_getrecmaster - read the recovery master of a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @recmaster: a pointer to the recmaster to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *recmaster on success. + */ +bool ctdb_getrecmaster(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t *recmaster); + + +/** + * ctdb_getrecmode - read the recovery mode of a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @recmode: a pointer to the recmode to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *recmode on success. + */ +bool ctdb_getrecmode(struct ctdb_connection *ctdb, + uint32_t destnode, + uint32_t *recmode); + + +/** + * ctdb_getnodemap - read the nodemap from a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @nodemap: a pointer to the nodemap to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *nodemap on success. + * A non-NULL nodemap must be freed by calling ctdb_free_nodemap. + */ +bool ctdb_getnodemap(struct ctdb_connection *ctdb, + uint32_t destnode, struct ctdb_node_map **nodemap); + +/** + * ctdb_getifaces - read the list of interfaces from a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @ifaces: a pointer to the ifaces to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *ifaces on success. + * A non-NULL value of the ifaces must be release released/freed + * by ctdb_free_ifaces(). + */ +bool ctdb_getifaces(struct ctdb_connection *ctdb, + uint32_t destnode, struct ctdb_ifaces_list **ifaces); + +/* + * This function is used to release/free the nodemap structure returned + * by ctdb_getnodemap() and ctdb_getnodemap_recv() + */ +void ctdb_free_nodemap(struct ctdb_node_map *nodemap); + + +/** + * ctdb_getpublicips - read the public ip list from a node. + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @ips: a pointer to the returned public ip list + * + * This control returns the list of public ips known to the local node. + * Deamons only know about those ips that are listed in the local + * public addresses file, which means the returned list of ips may + * be only a subset of all ips across the entire cluster. + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * This returns false if something went wrong. + * If the command failed, it guarantees to set ips to NULL. + * A non-NULL value for nodemap means the command was successful. + * + * A non-NULL value of the nodemap must be release released/freed + * by ctdb_free_publicips(). + */ +bool ctdb_getpublicips(struct ctdb_connection *ctdb, + uint32_t destnode, struct ctdb_all_public_ips **ips); + +/* + * This function is used to release/free the public ip structure returned + * by ctdb_getpublicips() and ctdb_getpublicips_recv() + */ +void ctdb_free_publicips(struct ctdb_all_public_ips *ips); + + +/** + * ctdb_getvnnmap - read the vnn map from a node (synchronous) + * @ctdb: the ctdb_connection from ctdb_connect. + * @destnode: the destination node (see below) + * @vnnmap: a pointer to the vnnmap to fill in + * + * There are several special values for destnode, detailed in + * ctdb_protocol.h, particularly CTDB_CURRENT_NODE which means the + * local ctdbd. + * + * Returns true and fills in *vnnmap on success. + * A non-NULL value of the vnnmap must be released/freed + * by ctdb_free_vnnmap(). + */ +bool ctdb_getvnnmap(struct ctdb_connection *ctdb, + uint32_t destnode, struct ctdb_vnn_map **vnnmap); + +/* + * This function is used to release/free the vnnmap structure returned + * by ctdb_getvnnmap() and ctdb_getvnnmap_recv() + */ +void ctdb_free_vnnmap(struct ctdb_vnn_map *vnnmap); + +/* These ugly macro wrappers make the callbacks typesafe. */ +#include <ctdb_typesafe_cb.h> +#define ctdb_sendcb(cb, cbdata) \ + typesafe_cb_preargs(void, (cb), (cbdata), \ + struct ctdb_connection *, struct ctdb_request *) + +#define ctdb_msgcb(cb, cbdata) \ + typesafe_cb_preargs(void, (cb), (cbdata), \ + struct ctdb_connection *, uint64_t, TDB_DATA) + +#define ctdb_connect(addr, log, logpriv) \ + ctdb_connect((addr), \ + typesafe_cb_postargs(void, (log), (logpriv), \ + int, const char *, va_list), \ + (logpriv)) + +#define ctdb_set_message_handler(ctdb, srvid, handler, hdata) \ + ctdb_set_message_handler((ctdb), (srvid), \ + ctdb_msgcb((handler), (hdata)), (hdata)) + +#define ctdb_remove_message_handler(ctdb, srvid, handler, hdata) \ + ctdb_remove_message_handler((ctdb), (srvid), \ + ctdb_msgcb((handler), (hdata)), (hdata)) + +#define ctdb_attachdb_send(ctdb, name, persistent, tdb_flags, cb, cbdata) \ + ctdb_attachdb_send((ctdb), (name), (persistent), (tdb_flags), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_readrecordlock_async(_ctdb_db, key, cb, cbdata) \ + ctdb_readrecordlock_async((_ctdb_db), (key), \ + typesafe_cb_preargs(void, (cb), (cbdata), \ + struct ctdb_db *, struct ctdb_lock *, \ + TDB_DATA), (cbdata)) + +#define ctdb_set_message_handler_send(ctdb, srvid, handler, hdata, cb, cbdata) \ + ctdb_set_message_handler_send((ctdb), (srvid), \ + ctdb_msgcb((handler), (hdata)), (hdata), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_remove_message_handler_send(ctdb, srvid, handler, hdata, cb, cbdata) \ + ctdb_remove_message_handler_send((ctdb), (srvid), \ + ctdb_msgcb((handler), (hdata)), (hdata), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getpnn_send(ctdb, destnode, cb, cbdata) \ + ctdb_getpnn_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getdbstat_send(ctdb, destnode, db_id, cb, cbdata) \ + ctdb_getdbstat_send((ctdb), (destnode), (db_id), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_check_message_handlers_send(ctdb, destnode, num, mhs, \ + cb, cbdata) \ + ctdb_check_message_handlers_send((ctdb), (destnode), (num), \ + (mhs), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getrecmaster_send(ctdb, destnode, cb, cbdata) \ + ctdb_getrecmaster_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getrecmode_send(ctdb, destnode, cb, cbdata) \ + ctdb_getrecmode_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getnodemap_send(ctdb, destnode, cb, cbdata) \ + ctdb_getnodemap_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getpublicips_send(ctdb, destnode, cb, cbdata) \ + ctdb_getpublicips_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getdbseqnum_send(ctdb, destnode, dbid, cb, cbdata) \ + ctdb_getdbseqnum_send((ctdb), (destnode), (dbid), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getifaces_send(ctdb, destnode, cb, cbdata) \ + ctdb_getifaces_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#define ctdb_getvnnmap_send(ctdb, destnode, cb, cbdata) \ + ctdb_getvnnmap_send((ctdb), (destnode), \ + ctdb_sendcb((cb), (cbdata)), (cbdata)) + +#endif diff --git a/ctdb/include/ctdb_client.h b/ctdb/include/ctdb_client.h new file mode 100644 index 0000000000..c14a395b9e --- /dev/null +++ b/ctdb/include/ctdb_client.h @@ -0,0 +1,630 @@ +/* + ctdb database library: old client interface + + Copyright (C) Andrew Tridgell 2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CTDB_CLIENT_H +#define _CTDB_CLIENT_H +#include <ctdb_protocol.h> + +enum control_state {CTDB_CONTROL_WAIT, CTDB_CONTROL_DONE, CTDB_CONTROL_ERROR, CTDB_CONTROL_TIMEOUT}; + +struct ctdb_client_control_state { + struct ctdb_context *ctdb; + uint32_t reqid; + int32_t status; + TDB_DATA outdata; + enum control_state state; + char *errormsg; + struct ctdb_req_control *c; + + /* if we have a callback registered for the completion (or failure) of + this control + if a callback is used, it MUST talloc_free the cb_data passed to it + */ + struct { + void (*fn)(struct ctdb_client_control_state *); + void *private_data; + } async; +}; + +struct ctdb_client_notify_register { + uint64_t srvid; + uint32_t len; + uint8_t notify_data[1]; +}; + +struct ctdb_client_notify_deregister { + uint64_t srvid; +}; + +struct tevent_context; + +/* + initialise ctdb subsystem +*/ +struct ctdb_context *ctdb_init(struct tevent_context *ev); + +/* + choose the transport +*/ +int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport); + +/* + set the directory for the local databases +*/ +int ctdb_set_tdb_dir(struct ctdb_context *ctdb, const char *dir); +int ctdb_set_tdb_dir_persistent(struct ctdb_context *ctdb, const char *dir); +int ctdb_set_tdb_dir_state(struct ctdb_context *ctdb, const char *dir); + +/* + set some flags +*/ +void ctdb_set_flags(struct ctdb_context *ctdb, unsigned flags); + +/* + tell ctdb what address to listen on, in transport specific format +*/ +int ctdb_set_address(struct ctdb_context *ctdb, const char *address); + +int ctdb_set_socketname(struct ctdb_context *ctdb, const char *socketname); +const char *ctdb_get_socketname(struct ctdb_context *ctdb); + +/* + tell ctdb what nodes are available. This takes a filename, which will contain + 1 node address per line, in a transport specific format +*/ +int ctdb_set_nlist(struct ctdb_context *ctdb, const char *nlist); + +/* + Check that a specific ip address exists in the node list and returns + the id for the node or -1 +*/ +int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const char *nodeip); + +/* + start the ctdb protocol +*/ +int ctdb_start(struct ctdb_context *ctdb); +int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork, bool use_syslog, const char *public_address_list); + +/* + attach to a ctdb database +*/ +struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, + struct timeval timeout, + const char *name, + bool persistent, + uint32_t tdb_flags); + + +/* + find an attached ctdb_db handle given a name + */ +struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb, const char *name); + +/* + error string for last ctdb error +*/ +const char *ctdb_errstr(struct ctdb_context *); + +/* a ctdb call function */ +typedef int (*ctdb_fn_t)(struct ctdb_call_info *); + +/* + setup a ctdb call function +*/ +int ctdb_set_call(struct ctdb_db_context *ctdb_db, ctdb_fn_t fn, uint32_t id); + + + +/* + make a ctdb call. The associated ctdb call function will be called on the DMASTER + for the given record +*/ +int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call); + +/* + initiate an ordered ctdb cluster shutdown + this function will never return +*/ +void ctdb_shutdown(struct ctdb_context *ctdb); + +/* return pnn of this node */ +uint32_t ctdb_get_pnn(struct ctdb_context *ctdb); + +/* + return the number of nodes +*/ +uint32_t ctdb_get_num_nodes(struct ctdb_context *ctdb); + +/* setup a handler for ctdb messages */ +typedef void (*ctdb_msg_fn_t)(struct ctdb_context *, uint64_t srvid, + TDB_DATA data, void *); +int ctdb_client_set_message_handler(struct ctdb_context *ctdb, uint64_t srvid, + ctdb_msg_fn_t handler, + void *private_data); +int ctdb_client_remove_message_handler(struct ctdb_context *ctdb, + uint64_t srvid, void *private_data); + + +int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call); +struct ctdb_client_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct ctdb_call *call); +int ctdb_call_recv(struct ctdb_client_call_state *state, struct ctdb_call *call); + +/* send a ctdb message */ +int ctdb_client_send_message(struct ctdb_context *ctdb, uint32_t pnn, + uint64_t srvid, TDB_DATA data); + + +/* + Fetch a ctdb record from a remote node + . Underneath this will force the + dmaster for the record to be moved to the local node. +*/ +struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx, + TDB_DATA key, TDB_DATA *data); + +struct ctdb_record_handle *ctdb_fetch_readonly_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx, TDB_DATA key, TDB_DATA *data, int read_only); + +int ctdb_record_store(struct ctdb_record_handle *h, TDB_DATA data); + +int ctdb_fetch(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx, + TDB_DATA key, TDB_DATA *data); + +int ctdb_register_message_handler(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, + uint64_t srvid, + ctdb_msg_fn_t handler, + void *private_data); + +struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id); + + +struct ctdb_context *ctdb_cmdline_client(struct tevent_context *ev, + struct timeval req_timeout); + +struct ctdb_statistics; +int ctdb_ctrl_statistics(struct ctdb_context *ctdb, uint32_t destnode, struct ctdb_statistics *status); + +int ctdb_ctrl_shutdown(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +struct ctdb_vnn_map; +int ctdb_ctrl_getvnnmap(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_vnn_map **vnnmap); +int ctdb_ctrl_setvnnmap(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_vnn_map *vnnmap); + +/* table that contains a list of all dbids on a node + */ +struct ctdb_dbid_map { + uint32_t num; + struct ctdb_dbid { + uint32_t dbid; +#define CTDB_DB_FLAGS_PERSISTENT 0x01 +#define CTDB_DB_FLAGS_READONLY 0x02 +#define CTDB_DB_FLAGS_STICKY 0x04 + uint8_t flags; + } dbs[1]; +}; +int ctdb_ctrl_getdbmap(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_dbid_map **dbmap); + + +struct ctdb_node_map; + +int ctdb_ctrl_getnodemap(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_node_map **nodemap); + +int ctdb_ctrl_getnodemapv4(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_node_map **nodemap); + +int ctdb_ctrl_reload_nodes_file(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode); + +struct ctdb_key_list { + uint32_t dbid; + uint32_t num; + TDB_DATA *keys; + struct ctdb_ltdb_header *headers; + TDB_DATA *data; +}; + +int ctdb_ctrl_pulldb( + struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid, + uint32_t lmaster, TALLOC_CTX *mem_ctx, + struct timeval timeout, TDB_DATA *outdata); + +struct ctdb_client_control_state *ctdb_ctrl_pulldb_send( + struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid, + uint32_t lmaster, TALLOC_CTX *mem_ctx, struct timeval timeout); + +int ctdb_ctrl_pulldb_recv( + struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, + TDB_DATA *outdata); + +int ctdb_ctrl_pushdb( + struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid, + TALLOC_CTX *mem_ctx, + struct timeval timeout, TDB_DATA indata); + +struct ctdb_client_control_state *ctdb_ctrl_pushdb_send( + struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid, + TALLOC_CTX *mem_ctx, struct timeval timeout, + TDB_DATA indata); + +int ctdb_ctrl_pushdb_recv( + struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, + struct ctdb_client_control_state *state); + + +int ctdb_ctrl_copydb(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t sourcenode, + uint32_t destnode, uint32_t dbid, uint32_t lmaster, + TALLOC_CTX *mem_ctx); + +int ctdb_ctrl_getdbpath(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx, const char **path); +int ctdb_ctrl_getdbname(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx, const char **name); +int ctdb_ctrl_getdbhealth(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + uint32_t dbid, TALLOC_CTX *mem_ctx, + const char **reason); +int ctdb_ctrl_createdb(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, const char *name, bool persistent); + +int ctdb_ctrl_process_exists(struct ctdb_context *ctdb, uint32_t destnode, pid_t pid); + +int ctdb_ctrl_ping(struct ctdb_context *ctdb, uint32_t destnode); + +int ctdb_ctrl_get_config(struct ctdb_context *ctdb); + +int ctdb_ctrl_get_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, int32_t *level); +int ctdb_ctrl_set_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, int32_t level); + +/* + change dmaster for all keys in the database to the new value + */ +int ctdb_ctrl_setdmaster(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, uint32_t dbid, uint32_t dmaster); + +/* + write a record on a specific db (this implicitely updates dmaster of the record to locally be the vnn of the node where the control is executed on) + */ +int ctdb_ctrl_write_record(struct ctdb_context *ctdb, uint32_t destnode, TALLOC_CTX *mem_ctx, uint32_t dbid, TDB_DATA key, TDB_DATA data); + +#define CTDB_RECOVERY_NORMAL 0 +#define CTDB_RECOVERY_ACTIVE 1 + +/* + get the recovery mode of a remote node + */ +int ctdb_ctrl_getrecmode(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, uint32_t *recmode); + +struct ctdb_client_control_state *ctdb_ctrl_getrecmode_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_getrecmode_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *recmode); + + +/* + set the recovery mode of a remote node + */ +int ctdb_ctrl_setrecmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmode); +/* + get the monitoring mode of a remote node + */ +int ctdb_ctrl_getmonmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *monmode); + +/* + set the monitoring mode of a remote node to active + */ +int ctdb_ctrl_enable_monmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +/* + set the monitoring mode of a remote node to disabled + */ +int ctdb_ctrl_disable_monmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + + +/* + get the recovery master of a remote node + */ +int ctdb_ctrl_getrecmaster(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, uint32_t *recmaster); + +struct ctdb_client_control_state *ctdb_ctrl_getrecmaster_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_getrecmaster_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *recmaster); + + + +/* + set the recovery master of a remote node + */ +int ctdb_ctrl_setrecmaster(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmaster); + +uint32_t *ctdb_get_connected_nodes(struct ctdb_context *ctdb, + struct timeval timeout, + TALLOC_CTX *mem_ctx, + uint32_t *num_nodes); + +int ctdb_statistics_reset(struct ctdb_context *ctdb, uint32_t destnode); + +int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile, bool use_syslog); + +typedef int (*ctdb_traverse_func)(struct ctdb_context *, TDB_DATA, TDB_DATA, void *); +int ctdb_traverse(struct ctdb_db_context *ctdb_db, ctdb_traverse_func fn, void *private_data); + +struct ctdb_dump_db_context { + FILE *f; + bool printemptyrecords; + bool printdatasize; + bool printlmaster; + bool printhash; + bool printrecordflags; +}; + +int ctdb_dumpdb_record(struct ctdb_context *ctdb, TDB_DATA key, TDB_DATA data, void *p); +int ctdb_dump_db(struct ctdb_db_context *ctdb_db, + struct ctdb_dump_db_context *ctx); + +/* + get the pid of a ctdb daemon + */ +int ctdb_ctrl_getpid(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *pid); + +int ctdb_ctrl_freeze(struct ctdb_context *ctdb, struct timeval timeout, + uint32_t destnode); +int ctdb_ctrl_freeze_priority(struct ctdb_context *ctdb, struct timeval timeout, + uint32_t destnode, uint32_t priority); + +struct ctdb_client_control_state * +ctdb_ctrl_freeze_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, + struct timeval timeout, uint32_t destnode, + uint32_t priority); + +int ctdb_ctrl_freeze_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, + struct ctdb_client_control_state *state); + +int ctdb_ctrl_thaw_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t priority); +int ctdb_ctrl_thaw(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_getpnn(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_get_tunable(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + const char *name, uint32_t *value); + +int ctdb_ctrl_set_tunable(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + const char *name, uint32_t value); + +int ctdb_ctrl_list_tunables(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + TALLOC_CTX *mem_ctx, + const char ***list, uint32_t *count); + +int ctdb_ctrl_modflags(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + uint32_t set, uint32_t clear); + +enum ctdb_server_id_type { + SERVER_TYPE_SAMBA=1, + SERVER_TYPE_NFSD=2, + SERVER_TYPE_ISCSID=3 +}; + +struct ctdb_server_id { + enum ctdb_server_id_type type; + uint32_t pnn; + uint32_t server_id; +}; + +struct ctdb_server_id_list { + uint32_t num; + struct ctdb_server_id server_ids[1]; +}; + + +int ctdb_ctrl_register_server_id(struct ctdb_context *ctdb, + struct timeval timeout, + struct ctdb_server_id *id); +int ctdb_ctrl_unregister_server_id(struct ctdb_context *ctdb, + struct timeval timeout, + struct ctdb_server_id *id); +int ctdb_ctrl_check_server_id(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + struct ctdb_server_id *id, uint32_t *status); +int ctdb_ctrl_get_server_id_list(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, + struct timeval timeout, uint32_t destnode, + struct ctdb_server_id_list **svid_list); + +struct ctdb_uptime { + struct timeval current_time; + struct timeval ctdbd_start_time; + struct timeval last_recovery_started; + struct timeval last_recovery_finished; +}; + +/* + struct for tcp_client control + this is an ipv4 only version of this structure used by samba + samba will later be migrated over to use the + ctdb_control_tcp_addr structure instead + */ +struct ctdb_control_tcp { + struct sockaddr_in src; // samba uses this + struct sockaddr_in dest;// samba uses this +}; +/* new style structure */ +struct ctdb_control_tcp_addr { + ctdb_sock_addr src; + ctdb_sock_addr dest; +}; + +int ctdb_socket_connect(struct ctdb_context *ctdb); + +/* + get the uptime of a remote node + */ +int ctdb_ctrl_uptime(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, struct ctdb_uptime **uptime); + +struct ctdb_client_control_state *ctdb_ctrl_uptime_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_uptime_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, struct ctdb_uptime **uptime); + +int ctdb_ctrl_end_recovery(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_getreclock(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, const char **reclock); +int ctdb_ctrl_setreclock(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + const char *reclock); + + +uint32_t *list_of_connected_nodes(struct ctdb_context *ctdb, + struct ctdb_node_map *node_map, + TALLOC_CTX *mem_ctx, + bool include_self); +uint32_t *list_of_active_nodes(struct ctdb_context *ctdb, + struct ctdb_node_map *node_map, + TALLOC_CTX *mem_ctx, + bool include_self); +uint32_t *list_of_vnnmap_nodes(struct ctdb_context *ctdb, + struct ctdb_vnn_map *vnn_map, + TALLOC_CTX *mem_ctx, + bool include_self); +uint32_t *list_of_active_nodes_except_pnn(struct ctdb_context *ctdb, + struct ctdb_node_map *node_map, + TALLOC_CTX *mem_ctx, + uint32_t pnn); + +int ctdb_read_pnn_lock(int fd, int32_t pnn); + +/* + get capabilities of a remote node + */ +int ctdb_ctrl_getcapabilities(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *capabilities); + +struct ctdb_client_control_state *ctdb_ctrl_getcapabilities_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_getcapabilities_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *capabilities); + + +int32_t ctdb_ctrl_transaction_active(struct ctdb_context *ctdb, + uint32_t destnode, + uint32_t db_id); + +struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx, + struct ctdb_marshall_buffer *m, + uint64_t db_id, + uint32_t reqid, + TDB_DATA key, + struct ctdb_ltdb_header *header, + TDB_DATA data); +TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m); + +struct ctdb_transaction_handle *ctdb_transaction_start(struct ctdb_db_context *ctdb_db, + TALLOC_CTX *mem_ctx); +int ctdb_transaction_fetch(struct ctdb_transaction_handle *h, + TALLOC_CTX *mem_ctx, + TDB_DATA key, TDB_DATA *data); +int ctdb_transaction_store(struct ctdb_transaction_handle *h, + TDB_DATA key, TDB_DATA data); +int ctdb_transaction_commit(struct ctdb_transaction_handle *h); + +int ctdb_ctrl_recd_ping(struct ctdb_context *ctdb); + +int switch_from_server_to_client(struct ctdb_context *ctdb, const char *fmt, + ...); + +int ctdb_ctrl_getscriptstatus(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, enum ctdb_eventscript_call type, + struct ctdb_scripts_wire **script_status); + + +struct debug_levels { + int32_t level; + const char *description; +}; +extern struct debug_levels debug_levels[]; + +const char *get_debug_by_level(int32_t level); +int32_t get_debug_by_desc(const char *desc); + +int ctdb_ctrl_stop_node(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); +int ctdb_ctrl_continue_node(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode); + +int ctdb_ctrl_setnatgwstate(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t natgwstate); +int ctdb_ctrl_setlmasterrole(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t lmasterrole); +int ctdb_ctrl_setrecmasterrole(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmasterrole); + +int ctdb_ctrl_enablescript(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, const char *script); +int ctdb_ctrl_disablescript(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, const char *script); + +struct ctdb_ban_time { + uint32_t pnn; + uint32_t time; +}; + +int ctdb_ctrl_set_ban(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, struct ctdb_ban_time *bantime); +int ctdb_ctrl_get_ban(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, struct ctdb_ban_time **bantime); + +struct ctdb_db_priority { + uint32_t db_id; + uint32_t priority; +}; + +int ctdb_ctrl_set_db_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, struct ctdb_db_priority *db_prio); +int ctdb_ctrl_get_db_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t db_id, uint32_t *priority); + +int ctdb_ctrl_getstathistory(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, struct ctdb_statistics_wire **stats); + + + +struct ctdb_client_control_state * +ctdb_ctrl_updaterecord_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, struct ctdb_db_context *ctdb_db, TDB_DATA key, struct ctdb_ltdb_header *header, TDB_DATA data); + +int ctdb_ctrl_updaterecord_recv(struct ctdb_context *ctdb, struct ctdb_client_control_state *state); + +int +ctdb_ctrl_updaterecord(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, struct ctdb_db_context *ctdb_db, TDB_DATA key, struct ctdb_ltdb_header *header, TDB_DATA data); + + +struct ctdb_client_control_state * +ctdb_ctrl_set_db_readonly_send(struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid); +int ctdb_ctrl_set_db_readonly_recv(struct ctdb_context *ctdb, struct ctdb_client_control_state *state); +int ctdb_ctrl_set_db_readonly(struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid); + +struct ctdb_client_control_state * +ctdb_ctrl_set_db_sticky_send(struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid); +int ctdb_ctrl_set_db_sticky_recv(struct ctdb_context *ctdb, struct ctdb_client_control_state *state); +int ctdb_ctrl_set_db_sticky(struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid); + +#endif /* _CTDB_CLIENT_H */ diff --git a/ctdb/include/ctdb_private.h b/ctdb/include/ctdb_private.h new file mode 100644 index 0000000000..0f9da360c6 --- /dev/null +++ b/ctdb/include/ctdb_private.h @@ -0,0 +1,1502 @@ +/* + ctdb database library + + Copyright (C) Andrew Tridgell 2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CTDB_PRIVATE_H +#define _CTDB_PRIVATE_H + +#include "ctdb_client.h" +#include <sys/socket.h> + +/* + recovery daemon memdump reply address + */ +struct rd_memdump_reply { + uint32_t pnn; + uint64_t srvid; +}; + +/* + description for a TAKEOVER_RUN message reply address + */ +struct takeover_run_reply { + uint32_t pnn; + uint64_t srvid; +}; + +/* + * pid of the ctdbd daemon + */ +extern pid_t ctdbd_pid; + +/* + a tcp connection description + also used by tcp_add and tcp_remove controls + */ +struct ctdb_tcp_connection { + ctdb_sock_addr src_addr; + ctdb_sock_addr dst_addr; +}; + +/* the wire representation for a tcp tickle array */ +struct ctdb_tcp_wire_array { + uint32_t num; + struct ctdb_tcp_connection connections[1]; +}; + +/* the list of tcp tickles used by get/set tcp tickle list */ +struct ctdb_control_tcp_tickle_list { + ctdb_sock_addr addr; + struct ctdb_tcp_wire_array tickles; +}; + +/* + array of tcp connections + */ +struct ctdb_tcp_array { + uint32_t num; + struct ctdb_tcp_connection *connections; +}; + + +/* all tunable variables go in here */ +struct ctdb_tunable { + uint32_t max_redirect_count; + uint32_t seqnum_interval; /* unit is ms */ + uint32_t control_timeout; + uint32_t traverse_timeout; + uint32_t keepalive_interval; + uint32_t keepalive_limit; + uint32_t recover_timeout; + uint32_t recover_interval; + uint32_t election_timeout; + uint32_t takeover_timeout; + uint32_t monitor_interval; + uint32_t tickle_update_interval; + uint32_t script_timeout; + uint32_t script_timeout_count; /* allow dodgy scripts to hang this many times in a row before we mark the node unhealthy */ + uint32_t script_unhealthy_on_timeout; /* obsolete */ + uint32_t recovery_grace_period; + uint32_t recovery_ban_period; + uint32_t database_hash_size; + uint32_t database_max_dead; + uint32_t rerecovery_timeout; + uint32_t enable_bans; + uint32_t deterministic_public_ips; + uint32_t reclock_ping_period; + uint32_t no_ip_failback; + uint32_t disable_ip_failover; + uint32_t verbose_memory_names; + uint32_t recd_ping_timeout; + uint32_t recd_ping_failcount; + uint32_t log_latency_ms; + uint32_t reclock_latency_ms; + uint32_t recovery_drop_all_ips; + uint32_t verify_recovery_lock; + uint32_t vacuum_interval; + uint32_t vacuum_default_interval; + uint32_t vacuum_max_run_time; + uint32_t repack_limit; + uint32_t vacuum_limit; + uint32_t vacuum_min_interval; + uint32_t vacuum_max_interval; + uint32_t max_queue_depth_drop_msg; + uint32_t use_status_events_for_monitoring; + uint32_t allow_unhealthy_db_read; + uint32_t stat_history_interval; + uint32_t deferred_attach_timeout; + uint32_t vacuum_fast_path_count; + uint32_t lcp2_public_ip_assignment; + uint32_t allow_client_db_attach; + uint32_t recover_pdb_by_seqnum; + uint32_t deferred_rebalance_on_node_add; + uint32_t fetch_collapse; + uint32_t max_lacount; + uint32_t hopcount_make_sticky; + uint32_t sticky_duration; + uint32_t sticky_pindown; + uint32_t no_ip_takeover; + uint32_t db_record_count_warn; + uint32_t db_record_size_warn; + uint32_t db_size_warn; + uint32_t pulldb_preallocation_size; +}; + +/* + an installed ctdb remote call +*/ +struct ctdb_registered_call { + struct ctdb_registered_call *next, *prev; + uint32_t id; + ctdb_fn_t fn; +}; + +/* + this address structure might need to be generalised later for some + transports +*/ +struct ctdb_address { + const char *address; + int port; +}; + +/* + check that a pnn is valid + */ +#define ctdb_validate_pnn(ctdb, pnn) (((uint32_t)(pnn)) < (ctdb)->num_nodes) + + +/* called from the queue code when a packet comes in. Called with data==NULL + on error */ +typedef void (*ctdb_queue_cb_fn_t)(uint8_t *data, size_t length, + void *private_data); + +/* used for callbacks in ctdb_control requests */ +typedef void (*ctdb_control_callback_fn_t)(struct ctdb_context *, + int32_t status, TDB_DATA data, + const char *errormsg, + void *private_data); +/* + structure describing a connected client in the daemon + */ +struct ctdb_client { + struct ctdb_context *ctdb; + int fd; + struct ctdb_queue *queue; + uint32_t client_id; + pid_t pid; + struct ctdb_tcp_list *tcp_list; + uint32_t db_id; + uint32_t num_persistent_updates; + struct ctdb_client_notify_list *notify; +}; + +struct ctdb_iface; + +/* state associated with a public ip address */ +struct ctdb_vnn { + struct ctdb_vnn *prev, *next; + + struct ctdb_iface *iface; + const char **ifaces; + ctdb_sock_addr public_address; + uint8_t public_netmask_bits; + + /* the node number that is serving this public address, if any. + If no node serves this ip it is set to -1 */ + int32_t pnn; + + /* List of clients to tickle for this public address */ + struct ctdb_tcp_array *tcp_array; + + /* whether we need to update the other nodes with changes to our list + of connected clients */ + bool tcp_update_needed; + + /* a context to hang sending gratious arp events off */ + TALLOC_CTX *takeover_ctx; + + struct ctdb_kill_tcp *killtcp; +}; + +/* + state associated with one node +*/ +struct ctdb_node { + struct ctdb_context *ctdb; + struct ctdb_address address; + const char *name; /* for debug messages */ + void *private_data; /* private to transport */ + uint32_t pnn; + uint32_t flags; + + /* used by the dead node monitoring */ + uint32_t dead_count; + uint32_t rx_cnt; + uint32_t tx_cnt; + + /* used to track node capabilities, is only valid/tracked inside the + recovery daemon. + */ + uint32_t capabilities; + + /* a list of controls pending to this node, so we can time them out quickly + if the node becomes disconnected */ + struct daemon_control_state *pending_controls; + + /* used by the recovery daemon when distributing ip addresses + across the nodes. it needs to know which public ip's can be handled + by each node. + */ + struct ctdb_all_public_ips *known_public_ips; + struct ctdb_all_public_ips *available_public_ips; + /* used by the recovery dameon to track when a node should be banned */ + struct ctdb_banning_state *ban_state; +}; + +/* + transport specific methods +*/ +struct ctdb_methods { + int (*initialise)(struct ctdb_context *); /* initialise transport structures */ + int (*start)(struct ctdb_context *); /* start the transport */ + int (*add_node)(struct ctdb_node *); /* setup a new node */ + int (*connect_node)(struct ctdb_node *); /* connect to node */ + int (*queue_pkt)(struct ctdb_node *, uint8_t *data, uint32_t length); + void *(*allocate_pkt)(TALLOC_CTX *mem_ctx, size_t ); + void (*shutdown)(struct ctdb_context *); /* shutdown transport */ + void (*restart)(struct ctdb_node *); /* stop and restart the connection */ +}; + +/* + transport calls up to the ctdb layer +*/ +struct ctdb_upcalls { + /* recv_pkt is called when a packet comes in */ + void (*recv_pkt)(struct ctdb_context *, uint8_t *data, uint32_t length); + + /* node_dead is called when an attempt to send to a node fails */ + void (*node_dead)(struct ctdb_node *); + + /* node_connected is called when a connection to a node is established */ + void (*node_connected)(struct ctdb_node *); +}; + +/* list of message handlers - needs to be changed to a more efficient data + structure so we can find a message handler given a srvid quickly */ +struct ctdb_message_list { + struct ctdb_context *ctdb; + struct ctdb_message_list *next, *prev; + uint64_t srvid; + ctdb_msg_fn_t message_handler; + void *message_private; +}; + +/* additional data required for the daemon mode */ +struct ctdb_daemon_data { + int sd; + char *name; + struct ctdb_queue *queue; +}; + + +#define CTDB_UPDATE_STAT(ctdb, counter, value) \ + { \ + if (value > ctdb->statistics.counter) { \ + ctdb->statistics.counter = c->hopcount; \ + } \ + if (value > ctdb->statistics_current.counter) { \ + ctdb->statistics_current.counter = c->hopcount; \ + } \ + } + +#define CTDB_INCREMENT_STAT(ctdb, counter) \ + { \ + ctdb->statistics.counter++; \ + ctdb->statistics_current.counter++; \ + } + +#define CTDB_INCREMENT_DB_STAT(ctdb_db, counter) \ + { \ + ctdb_db->statistics.counter++; \ + } + +#define CTDB_DECREMENT_STAT(ctdb, counter) \ + { \ + if (ctdb->statistics.counter > 0) \ + ctdb->statistics.counter--; \ + if (ctdb->statistics_current.counter > 0) \ + ctdb->statistics_current.counter--; \ + } + +#define CTDB_UPDATE_RECLOCK_LATENCY(ctdb, name, counter, value) \ + { \ + if (value > ctdb->statistics.counter.max) \ + ctdb->statistics.counter.max = value; \ + if (value > ctdb->statistics_current.counter.max) \ + ctdb->statistics_current.counter.max = value; \ + \ + if (ctdb->statistics.counter.num == 0 || value < ctdb->statistics.counter.min) \ + ctdb->statistics.counter.min = value; \ + if (ctdb->statistics_current.counter.num == 0 || value < ctdb->statistics_current.counter.min) \ + ctdb->statistics_current.counter.min = value; \ + \ + ctdb->statistics.counter.total += value; \ + ctdb->statistics_current.counter.total += value; \ + \ + ctdb->statistics.counter.num++; \ + ctdb->statistics_current.counter.num++; \ + \ + if (ctdb->tunable.reclock_latency_ms != 0) { \ + if (value*1000 > ctdb->tunable.reclock_latency_ms) { \ + DEBUG(DEBUG_ERR, ("High RECLOCK latency %fs for operation %s\n", value, name)); \ + } \ + } \ + } + + +#define CTDB_UPDATE_LATENCY(ctdb, db, operation, counter, t) \ + { \ + double l = timeval_elapsed(&t); \ + \ + if (l > ctdb->statistics.counter.max) \ + ctdb->statistics.counter.max = l; \ + if (l > ctdb->statistics_current.counter.max) \ + ctdb->statistics_current.counter.max = l; \ + \ + if (ctdb->statistics.counter.num == 0 || l < ctdb->statistics.counter.min) \ + ctdb->statistics.counter.min = l; \ + if (ctdb->statistics_current.counter.num == 0 || l < ctdb->statistics_current.counter.min) \ + ctdb->statistics_current.counter.min = l; \ + \ + ctdb->statistics.counter.total += l; \ + ctdb->statistics_current.counter.total += l; \ + \ + ctdb->statistics.counter.num++; \ + ctdb->statistics_current.counter.num++; \ + \ + if (ctdb->tunable.log_latency_ms !=0) { \ + if (l*1000 > ctdb->tunable.log_latency_ms) { \ + DEBUG(DEBUG_WARNING, ("High latency %.6fs for operation %s on database %s\n", l, operation, db->db_name));\ + } \ + } \ + } + + + +/* a structure that contains the elements required for the write record + control +*/ +struct ctdb_write_record { + uint32_t dbid; + uint32_t keylen; + uint32_t datalen; + unsigned char blob[1]; +}; + +enum ctdb_freeze_mode {CTDB_FREEZE_NONE, CTDB_FREEZE_PENDING, CTDB_FREEZE_FROZEN}; + +#define CTDB_MONITORING_ACTIVE 0 +#define CTDB_MONITORING_DISABLED 1 + +/* The different capabilities of the ctdb daemon. */ +#define CTDB_CAP_RECMASTER 0x00000001 +#define CTDB_CAP_LMASTER 0x00000002 +/* This capability is set if CTDB_LVS_PUBLIC_IP is set */ +#define CTDB_CAP_LVS 0x00000004 +/* This capability is set if NATGW is enabled */ +#define CTDB_CAP_NATGW 0x00000008 + +#define NUM_DB_PRIORITIES 3 +/* main state of the ctdb daemon */ +struct ctdb_context { + struct tevent_context *ev; + struct timeval ctdbd_start_time; + struct timeval last_recovery_started; + struct timeval last_recovery_finished; + uint32_t recovery_mode; + TALLOC_CTX *tickle_update_context; + TALLOC_CTX *keepalive_ctx; + TALLOC_CTX *check_public_ifaces_ctx; + struct ctdb_tunable tunable; + enum ctdb_freeze_mode freeze_mode[NUM_DB_PRIORITIES+1]; + struct ctdb_freeze_handle *freeze_handles[NUM_DB_PRIORITIES+1]; + bool freeze_transaction_started; + uint32_t freeze_transaction_id; + struct ctdb_address address; + const char *name; + const char *db_directory; + const char *db_directory_persistent; + const char *db_directory_state; + struct tdb_wrap *db_persistent_health; + uint32_t db_persistent_startup_generation; + uint64_t db_persistent_check_errors; + uint64_t max_persistent_check_errors; + const char *transport; + char *recovery_lock_file; + int recovery_lock_fd; + uint32_t pnn; /* our own pnn */ + uint32_t num_nodes; + uint32_t num_connected; + unsigned flags; + uint32_t capabilities; + struct idr_context *idr; + int lastid; + struct ctdb_node **nodes; /* array of nodes in the cluster - indexed by vnn */ + struct ctdb_vnn *vnn; /* list of public ip addresses and interfaces */ + struct ctdb_vnn *single_ip_vnn; /* a structure for the single ip */ + struct ctdb_iface *ifaces; /* list of local interfaces */ + char *err_msg; + const struct ctdb_methods *methods; /* transport methods */ + const struct ctdb_upcalls *upcalls; /* transport upcalls */ + void *private_data; /* private to transport */ + struct ctdb_db_context *db_list; + struct ctdb_message_list *message_list; + struct ctdb_daemon_data daemon; + struct ctdb_statistics statistics; + struct ctdb_statistics statistics_current; +#define MAX_STAT_HISTORY 100 + struct ctdb_statistics statistics_history[MAX_STAT_HISTORY]; + struct ctdb_vnn_map *vnn_map; + uint32_t num_clients; + uint32_t recovery_master; + struct ctdb_call_state *pending_calls; + struct ctdb_client_ip *client_ip_list; + bool do_checkpublicip; + struct trbt_tree *server_ids; + bool do_setsched; + void *saved_scheduler_param; + const char *event_script_dir; + const char *debug_hung_script; + const char *notification_script; + const char *default_public_interface; + pid_t ctdbd_pid; + pid_t recoverd_pid; + pid_t syslogd_pid; + bool done_startup; + const char *node_ip; + struct ctdb_monitor_state *monitor; + struct ctdb_log_state *log; + int start_as_disabled; + int start_as_stopped; + bool valgrinding; + uint32_t event_script_timeouts; /* counting how many consecutive times an eventscript has timedout */ + uint32_t *recd_ping_count; + TALLOC_CTX *release_ips_ctx; /* a context used to automatically drop all IPs if we fail to recover the node */ + + TALLOC_CTX *event_script_ctx; + + struct ctdb_event_script_state *current_monitor; + struct ctdb_scripts_wire *last_status[CTDB_EVENT_MAX]; + + TALLOC_CTX *banning_ctx; + + struct ctdb_vacuum_child_context *vacuumers; + + /* mapping from pid to ctdb_client * */ + struct ctdb_client_pid_list *client_pids; + + /* used in the recovery daemon to remember the ip allocation */ + struct trbt_tree *ip_tree; + + /* Used to defer db attach requests while in recovery mode */ + struct ctdb_deferred_attach_context *deferred_attach; + + /* if we are a child process, do we have a domain socket to send controls on */ + bool can_send_controls; + + /* list of event script callback functions that are active */ + struct event_script_callback *script_callbacks; + + struct ctdb_reloadips_handle *reload_ips; + + const char *public_addresses_file; + struct trbt_tree *child_processes; + TALLOC_CTX *debug_hung_script_ctx; +}; + +struct ctdb_db_context { + struct ctdb_db_context *next, *prev; + struct ctdb_context *ctdb; + uint32_t db_id; + uint32_t priority; + bool persistent; + bool readonly; /* Do we support read-only delegations ? */ + bool sticky; /* Do we support sticky records ? */ + const char *db_name; + const char *db_path; + struct tdb_wrap *ltdb; + struct tdb_context *rottdb; /* ReadOnly tracking TDB */ + struct ctdb_registered_call *calls; /* list of registered calls */ + uint32_t seqnum; + struct timed_event *seqnum_update; + struct ctdb_traverse_local_handle *traverse; + bool transaction_active; + struct ctdb_vacuum_handle *vacuum_handle; + char *unhealthy_reason; + int pending_requests; + struct lockwait_handle *lockwait_active; + struct lockwait_handle *lockwait_overflow; + struct revokechild_handle *revokechild_active; + struct ctdb_persistent_state *persistent_state; + struct trbt_tree *delete_queue; + struct trbt_tree *sticky_records; + int (*ctdb_ltdb_store_fn)(struct ctdb_db_context *ctdb_db, + TDB_DATA key, + struct ctdb_ltdb_header *header, + TDB_DATA data); + + /* used to track which records we are currently fetching + so we can avoid sending duplicate fetch requests + */ + struct trbt_tree *deferred_fetch; + + struct ctdb_db_statistics statistics; +}; + + +#define CTDB_NO_MEMORY(ctdb, p) do { if (!(p)) { \ + DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \ + ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \ + return -1; }} while (0) + +#define CTDB_NO_MEMORY_VOID(ctdb, p) do { if (!(p)) { \ + DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \ + ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \ + return; }} while (0) + +#define CTDB_NO_MEMORY_NULL(ctdb, p) do { if (!(p)) { \ + DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \ + ctdb_set_error(ctdb, "Out of memory at %s:%d", __FILE__, __LINE__); \ + return NULL; }} while (0) + +#define CTDB_NO_MEMORY_FATAL(ctdb, p) do { if (!(p)) { \ + DEBUG(0,("Out of memory for %s at %s\n", #p, __location__)); \ + ctdb_fatal(ctdb, "Out of memory in " __location__ ); \ + }} while (0) + +/* + structure passed in set_call control + */ +struct ctdb_control_set_call { + uint32_t db_id; + ctdb_fn_t fn; + uint32_t id; +}; + +/* + struct for kill_tcp control + */ +struct ctdb_control_killtcp { + ctdb_sock_addr src_addr; + ctdb_sock_addr dst_addr; +}; + +/* + struct holding a ctdb_sock_addr and an interface name, + used to add/remove public addresses + */ +struct ctdb_control_ip_iface { + ctdb_sock_addr addr; + uint32_t mask; + uint32_t len; + char iface[1]; +}; + +/* + struct holding a ctdb_sock_addr and an interface name, + used for send_gratious_arp + */ +struct ctdb_control_gratious_arp { + ctdb_sock_addr addr; + uint32_t mask; + uint32_t len; + char iface[1]; +}; + +/* + persistent store control - update this record on all other nodes + */ +struct ctdb_control_persistent_store { + uint32_t db_id; + uint32_t len; + uint8_t data[1]; +}; + +/* + structure used for CTDB_SRVID_NODE_FLAGS_CHANGED + */ +struct ctdb_node_flag_change { + uint32_t pnn; + uint32_t new_flags; + uint32_t old_flags; +}; + +/* + struct for admin setting a ban + */ +struct ctdb_ban_info { + uint32_t pnn; + uint32_t ban_time; +}; + +enum call_state {CTDB_CALL_WAIT, CTDB_CALL_DONE, CTDB_CALL_ERROR}; + +#define CTDB_LMASTER_ANY 0xffffffff + +/* + state of a in-progress ctdb call +*/ +struct ctdb_call_state { + struct ctdb_call_state *next, *prev; + enum call_state state; + uint32_t reqid; + struct ctdb_req_call *c; + struct ctdb_db_context *ctdb_db; + const char *errmsg; + struct ctdb_call *call; + uint32_t generation; + struct { + void (*fn)(struct ctdb_call_state *); + void *private_data; + } async; +}; + + +/* used for fetch_lock */ +struct ctdb_fetch_handle { + struct ctdb_db_context *ctdb_db; + TDB_DATA key; + TDB_DATA *data; + struct ctdb_ltdb_header header; +}; + +/* internal prototypes */ +void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3); +void ctdb_fatal(struct ctdb_context *ctdb, const char *msg); +bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2); +int ctdb_parse_address(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, const char *str, + struct ctdb_address *address); +bool ctdb_same_ip(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2); +bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2); +uint32_t ctdb_hash(const TDB_DATA *key); +uint32_t ctdb_hash_string(const char *str); +void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_request_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_request_message(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_reply_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_reply_error(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); + +uint32_t ctdb_lmaster(struct ctdb_context *ctdb, const TDB_DATA *key); +int ctdb_ltdb_fetch(struct ctdb_db_context *ctdb_db, + TDB_DATA key, struct ctdb_ltdb_header *header, + TALLOC_CTX *mem_ctx, TDB_DATA *data); +int ctdb_ltdb_store(struct ctdb_db_context *ctdb_db, TDB_DATA key, + struct ctdb_ltdb_header *header, TDB_DATA data); +int ctdb_ltdb_delete(struct ctdb_db_context *ctdb_db, TDB_DATA key); +int ctdb_ltdb_fetch_with_header(struct ctdb_db_context *ctdb_db, + TDB_DATA key, struct ctdb_ltdb_header *header, + TALLOC_CTX *mem_ctx, TDB_DATA *data); +int32_t ctdb_control_start_persistent_update(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA recdata); +int32_t ctdb_control_cancel_persistent_update(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA recdata); +void ctdb_queue_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_queue_packet_opcode(struct ctdb_context *ctdb, struct ctdb_req_header *hdr, unsigned opcode); +int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db, + TDB_DATA key, struct ctdb_req_header *hdr, + void (*recv_pkt)(void *, struct ctdb_req_header *), + void *recv_context, bool ignore_generation); +int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db, + TDB_DATA key, struct ctdb_ltdb_header *header, + struct ctdb_req_header *hdr, TDB_DATA *data, + void (*recv_pkt)(void *, struct ctdb_req_header *), + void *recv_context, bool ignore_generation); +void ctdb_input_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *); + +struct ctdb_call_state *ctdb_call_local_send(struct ctdb_db_context *ctdb_db, + struct ctdb_call *call, + struct ctdb_ltdb_header *header, + TDB_DATA *data); + + +int ctdbd_start(struct ctdb_context *ctdb); +struct ctdb_call_state *ctdbd_call_send(struct ctdb_db_context *ctdb_db, struct ctdb_call *call); +int ctdbd_call_recv(struct ctdb_call_state *state, struct ctdb_call *call); + +/* + queue a packet for sending +*/ +int ctdb_queue_send(struct ctdb_queue *queue, uint8_t *data, uint32_t length); + +/* + setup the fd used by the queue + */ +int ctdb_queue_set_fd(struct ctdb_queue *queue, int fd); + +/* + setup a packet queue on a socket + */ +struct ctdb_queue *ctdb_queue_setup(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, int fd, int alignment, + + ctdb_queue_cb_fn_t callback, + void *private_data, const char *fmt, ...) + PRINTF_ATTRIBUTE(7,8); + +/* + allocate a packet for use in client<->daemon communication + */ +struct ctdb_req_header *_ctdbd_allocate_pkt(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, + enum ctdb_operation operation, + size_t length, size_t slength, + const char *type); +#define ctdbd_allocate_pkt(ctdb, mem_ctx, operation, length, type) \ + (type *)_ctdbd_allocate_pkt(ctdb, mem_ctx, operation, length, sizeof(type), #type) + +struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, + enum ctdb_operation operation, + size_t length, size_t slength, + const char *type); +#define ctdb_transport_allocate(ctdb, mem_ctx, operation, length, type) \ + (type *)_ctdb_transport_allocate(ctdb, mem_ctx, operation, length, sizeof(type), #type) + +int ctdb_queue_length(struct ctdb_queue *queue); + +/* + lock a record in the ltdb, given a key + */ +int ctdb_ltdb_lock(struct ctdb_db_context *ctdb_db, TDB_DATA key); + +/* + unlock a record in the ltdb, given a key + */ +int ctdb_ltdb_unlock(struct ctdb_db_context *ctdb_db, TDB_DATA key); + + +/* + make a ctdb call to the local daemon - async send. Called from client context. + + This constructs a ctdb_call request and queues it for processing. + This call never blocks. +*/ +struct ctdb_call_state *ctdb_client_call_send(struct ctdb_db_context *ctdb_db, + struct ctdb_call *call); + +/* + make a recv call to the local ctdb daemon - called from client context + + This is called when the program wants to wait for a ctdb_call to complete and get the + results. This call will block unless the call has already completed. +*/ +int ctdb_client_call_recv(struct ctdb_call_state *state, struct ctdb_call *call); + +int ctdb_client_send_message(struct ctdb_context *ctdb, uint32_t vnn, + uint64_t srvid, TDB_DATA data); + +/* + send a ctdb message +*/ +int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t pnn, + uint64_t srvid, TDB_DATA data); + + +struct lockwait_handle *ctdb_lockwait(struct ctdb_db_context *ctdb_db, + TDB_DATA key, + void (*callback)(void *), void *private_data); + +struct ctdb_call_state *ctdb_daemon_call_send(struct ctdb_db_context *ctdb_db, + struct ctdb_call *call); + +int ctdb_daemon_call_recv(struct ctdb_call_state *state, struct ctdb_call *call); + +struct ctdb_call_state *ctdb_daemon_call_send_remote(struct ctdb_db_context *ctdb_db, + struct ctdb_call *call, + struct ctdb_ltdb_header *header); + +int ctdb_call_local(struct ctdb_db_context *ctdb_db, struct ctdb_call *call, + struct ctdb_ltdb_header *header, TALLOC_CTX *mem_ctx, + TDB_DATA *data, bool updatetdb, uint32_t caller); + +#define ctdb_reqid_find(ctdb, reqid, type) (type *)_ctdb_reqid_find(ctdb, reqid, #type, __location__) + +void ctdb_recv_raw_pkt(void *p, uint8_t *data, uint32_t length); + +int ctdb_socket_connect(struct ctdb_context *ctdb); +void ctdb_client_read_cb(uint8_t *data, size_t cnt, void *args); + +#define CTDB_BAD_REQID ((uint32_t)-1) +uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state); +void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location); +void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid); + +void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); +void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr); + +int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode, + uint64_t srvid, uint32_t opcode, uint32_t client_id, uint32_t flags, + TDB_DATA data, + ctdb_control_callback_fn_t callback, + void *private_data); + +int32_t ctdb_control_db_attach(struct ctdb_context *ctdb, TDB_DATA indata, + TDB_DATA *outdata, uint64_t tdb_flags, + bool persistent, uint32_t client_id, + struct ctdb_req_control *c, + bool *async_reply); + +int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id, + ctdb_fn_t fn, int id); + +int ctdb_control(struct ctdb_context *ctdb, uint32_t destnode, uint64_t srvid, + uint32_t opcode, uint32_t flags, TDB_DATA data, + TALLOC_CTX *mem_ctx, TDB_DATA *outdata, int32_t *status, + struct timeval *timeout, char **errormsg); +int ctdb_control_recv(struct ctdb_context *ctdb, + struct ctdb_client_control_state *state, + TALLOC_CTX *mem_ctx, + TDB_DATA *outdata, int32_t *status, char **errormsg); + +struct ctdb_client_control_state * +ctdb_control_send(struct ctdb_context *ctdb, + uint32_t destnode, uint64_t srvid, + uint32_t opcode, uint32_t flags, TDB_DATA data, + TALLOC_CTX *mem_ctx, + struct timeval *timeout, + char **errormsg); + + + + +#define CHECK_CONTROL_DATA_SIZE(size) do { \ + if (indata.dsize != size) { \ + DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected %u\n", \ + opcode, (unsigned)indata.dsize, (unsigned)size)); \ + return -1; \ + } \ + } while (0) + +#define CHECK_CONTROL_MIN_DATA_SIZE(size) do { \ + if (indata.dsize < size) { \ + DEBUG(0,(__location__ " Invalid data size in opcode %u. Got %u expected >= %u\n", \ + opcode, (unsigned)indata.dsize, (unsigned)size)); \ + return -1; \ + } \ + } while (0) + +int ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); +int ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); +int ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); +int ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); +int ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); +int ctdb_control_writerecord(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata); + + +/* structure used for pulldb control */ +struct ctdb_control_pulldb { + uint32_t db_id; + uint32_t lmaster; +}; + +/* structure used for sending lists of records */ +struct ctdb_marshall_buffer { + uint32_t db_id; + uint32_t count; + uint8_t data[1]; +}; + +/* set dmaster control structure */ +struct ctdb_control_set_dmaster { + uint32_t db_id; + uint32_t dmaster; +}; + +/* + structure for setting a tunable + */ +struct ctdb_control_set_tunable { + uint32_t value; + uint32_t length; + uint8_t name[1]; +}; + +/* + structure for getting a tunable + */ +struct ctdb_control_get_tunable { + uint32_t length; + uint8_t name[1]; +}; + +/* + structure for listing tunables + */ +struct ctdb_control_list_tunable { + uint32_t length; + /* returns a : separated list of tunable names */ + uint8_t data[1]; +}; + + +struct ctdb_node_and_flagsv4 { + uint32_t pnn; + uint32_t flags; + struct sockaddr_in sin; +}; + +struct ctdb_node_mapv4 { + uint32_t num; + struct ctdb_node_and_flagsv4 nodes[1]; +}; + +struct ctdb_control_wipe_database { + uint32_t db_id; + uint32_t transaction_id; +}; + +/* + state of a in-progress ctdb call in client +*/ +struct ctdb_client_call_state { + enum call_state state; + uint32_t reqid; + struct ctdb_db_context *ctdb_db; + struct ctdb_call *call; + struct { + void (*fn)(struct ctdb_client_call_state *); + void *private_data; + } async; +}; + + +int32_t ctdb_control_traverse_start_ext(struct ctdb_context *ctdb, + TDB_DATA indata, + TDB_DATA *outdata, + uint32_t srcnode, + uint32_t client_id); +int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb, TDB_DATA indata, + TDB_DATA *outdata, uint32_t srcnode, uint32_t client_id); +int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata); +int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata); +int32_t ctdb_control_traverse_kill(struct ctdb_context *ctdb, TDB_DATA indata, + TDB_DATA *outdata, uint32_t srcnode); + +int ctdb_dispatch_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data); + +int daemon_register_message_handler(struct ctdb_context *ctdb, uint32_t client_id, uint64_t srvid); +int ctdb_deregister_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data); +int daemon_deregister_message_handler(struct ctdb_context *ctdb, uint32_t client_id, uint64_t srvid); +int daemon_check_srvids(struct ctdb_context *ctdb, TDB_DATA indata, + TDB_DATA *outdata); + +int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id); +int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id, uint32_t srcnode); + +struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid, + TDB_DATA key, struct ctdb_ltdb_header *, TDB_DATA data); + +struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r, + uint32_t *reqid, + struct ctdb_ltdb_header *header, + TDB_DATA *key, TDB_DATA *data); + +int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata); +int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_set_dmaster(struct ctdb_context *ctdb, TDB_DATA indata); + +int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, bool *async_reply, + const char **errormsg); +void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c, + TDB_DATA *outdata, int32_t status, const char *errormsg); + +int32_t ctdb_control_freeze(struct ctdb_context *ctdb, struct ctdb_req_control *c, bool *async_reply); +int32_t ctdb_control_thaw(struct ctdb_context *ctdb, uint32_t priority); + +int ctdb_start_recoverd(struct ctdb_context *ctdb); +void ctdb_stop_recoverd(struct ctdb_context *ctdb); + +uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb); + +void ctdb_disable_monitoring(struct ctdb_context *ctdb); +void ctdb_enable_monitoring(struct ctdb_context *ctdb); +void ctdb_stop_monitoring(struct ctdb_context *ctdb); +void ctdb_start_monitoring(struct ctdb_context *ctdb); +void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb); +void ctdb_send_keepalive(struct ctdb_context *ctdb, uint32_t destnode); +void ctdb_start_keepalive(struct ctdb_context *ctdb); +void ctdb_stop_keepalive(struct ctdb_context *ctdb); +int32_t ctdb_run_eventscripts(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA data, bool *async_reply); + + +void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb, struct ctdb_node *node); +void ctdb_call_resend_all(struct ctdb_context *ctdb); +void ctdb_node_dead(struct ctdb_node *node); +void ctdb_node_connected(struct ctdb_node *node); +bool ctdb_blocking_freeze(struct ctdb_context *ctdb); +void ctdb_set_scheduler(struct ctdb_context *ctdb); +void ctdb_restore_scheduler(struct ctdb_context *ctdb); + +struct tevent_signal *ctdb_init_sigchld(struct ctdb_context *ctdb); +pid_t ctdb_fork(struct ctdb_context *ctdb); +int ctdb_kill(struct ctdb_context *ctdb, pid_t pid, int signum); + +int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, + bool *async_reply); +int32_t ctdb_control_takeover_ipv4(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, + bool *async_reply); +int32_t ctdb_control_release_ip(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, + bool *async_reply); +int32_t ctdb_control_release_ipv4(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, + bool *async_reply); +int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + bool *async_reply); +int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + bool *async_reply); + +struct ctdb_public_ipv4 { + uint32_t pnn; + struct sockaddr_in sin; +}; + +int ctdb_ctrl_takeover_ip(struct ctdb_context *ctdb, struct timeval timeout, + uint32_t destnode, struct ctdb_public_ip *ip); +int ctdb_ctrl_release_ip(struct ctdb_context *ctdb, struct timeval timeout, + uint32_t destnode, struct ctdb_public_ip *ip); + +struct ctdb_all_public_ipsv4 { + uint32_t num; + struct ctdb_public_ipv4 ips[1]; +}; + +int32_t ctdb_control_get_public_ipsv4(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA *outdata); +int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA *outdata); +int ctdb_ctrl_get_public_ips(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + TALLOC_CTX *mem_ctx, + struct ctdb_all_public_ips **ips); +#define CTDB_PUBLIC_IP_FLAGS_ONLY_AVAILABLE 0x00010000 +int ctdb_ctrl_get_public_ips_flags(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, + uint32_t flags, + struct ctdb_all_public_ips **ips); +int ctdb_ctrl_get_public_ipsv4(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, struct ctdb_all_public_ips **ips); + +struct ctdb_control_iface_info { + char name[CTDB_IFACE_SIZE+2]; + uint16_t link_state; + uint32_t references; +}; + +struct ctdb_control_public_ip_info { + struct ctdb_public_ip ip; + uint32_t active_idx; + uint32_t num; + struct ctdb_control_iface_info ifaces[1]; +}; + +struct ctdb_control_get_ifaces { + uint32_t num; + struct ctdb_control_iface_info ifaces[1]; +}; + +int32_t ctdb_control_get_public_ip_info(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata, + TDB_DATA *outdata); +int32_t ctdb_control_get_ifaces(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA *outdata); +int32_t ctdb_control_set_iface_link(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA indata); +int ctdb_ctrl_get_public_ip_info(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, + const ctdb_sock_addr *addr, + struct ctdb_control_public_ip_info **info); +int ctdb_ctrl_get_ifaces(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, + struct ctdb_control_get_ifaces **ifaces); +int ctdb_ctrl_set_iface_link(struct ctdb_context *ctdb, + struct timeval timeout, uint32_t destnode, + TALLOC_CTX *mem_ctx, + const struct ctdb_control_iface_info *info); + +/* from takeover/system.c */ +uint32_t uint16_checksum(uint16_t *data, size_t n); +int ctdb_sys_send_arp(const ctdb_sock_addr *addr, const char *iface); +bool ctdb_sys_have_ip(ctdb_sock_addr *addr); +char *ctdb_sys_find_ifname(ctdb_sock_addr *addr); +bool ctdb_sys_check_iface_exists(const char *iface); +int ctdb_get_peer_pid(const int fd, pid_t *peer_pid); +int ctdb_sys_send_tcp(const ctdb_sock_addr *dest, + const ctdb_sock_addr *src, + uint32_t seq, uint32_t ack, int rst); + +int ctdb_set_public_addresses(struct ctdb_context *ctdb, bool check_addresses); +int ctdb_set_single_public_ip(struct ctdb_context *ctdb, + const char *iface, + const char *ip); +int ctdb_set_event_script(struct ctdb_context *ctdb, const char *script); +int ctdb_set_event_script_dir(struct ctdb_context *ctdb, const char *script_dir); +int ctdb_set_debug_hung_script(struct ctdb_context *ctdb, const char *script); +int ctdb_set_notification_script(struct ctdb_context *ctdb, const char *script); +void lcp2_forcerebalance(struct ctdb_context *ctdb, uint32_t pnn); +int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap); + +int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id, + TDB_DATA indata); +int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata, bool tcp_update_needed); +int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn); +int32_t ctdb_control_kill_tcp(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata); +int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata); + +void ctdb_takeover_client_destructor_hook(struct ctdb_client *client); +int ctdb_event_script(struct ctdb_context *ctdb, enum ctdb_eventscript_call call); +int ctdb_event_script_args(struct ctdb_context *ctdb, enum ctdb_eventscript_call call, + const char *fmt, ...) PRINTF_ATTRIBUTE(3,4); +int ctdb_event_script_callback(struct ctdb_context *ctdb, + TALLOC_CTX *mem_ctx, + void (*callback)(struct ctdb_context *, int, void *), + void *private_data, + bool from_user, + enum ctdb_eventscript_call call, + const char *fmt, ...) PRINTF_ATTRIBUTE(7,8); +void ctdb_release_all_ips(struct ctdb_context *ctdb); + +void set_nonblocking(int fd); +void set_close_on_exec(int fd); + +bool ctdb_recovery_lock(struct ctdb_context *ctdb, bool keep); + +int ctdb_set_recovery_lock_file(struct ctdb_context *ctdb, const char *file); + +int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata, + TDB_DATA *outdata); +int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata); +int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata); +int32_t ctdb_control_add_public_address(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_del_public_address(struct ctdb_context *ctdb, TDB_DATA indata); + +void ctdb_tunables_set_defaults(struct ctdb_context *ctdb); + +int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata); + +int ctdb_ctrl_get_all_tunables(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + struct ctdb_tunable *tunables); + +int ctdb_start_freeze(struct ctdb_context *ctdb, uint32_t priority); + +bool parse_ip_mask(const char *s, const char *iface, ctdb_sock_addr *addr, unsigned *mask); +bool parse_ip_port(const char *s, ctdb_sock_addr *addr); +bool parse_ip(const char *s, const char *iface, unsigned port, ctdb_sock_addr *addr); +bool parse_ipv4(const char *s, unsigned port, struct sockaddr_in *sin); + + +int ctdb_sys_open_capture_socket(const char *iface, void **private_data); +int ctdb_sys_close_capture_socket(void *private_data); +int ctdb_sys_read_tcp_packet(int s, void *private_data, ctdb_sock_addr *src, ctdb_sock_addr *dst, uint32_t *ack_seq, uint32_t *seq); + +int ctdb_ctrl_killtcp(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + struct ctdb_control_killtcp *killtcp); + +int ctdb_ctrl_add_public_ip(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + struct ctdb_control_ip_iface *pub); + +int ctdb_ctrl_del_public_ip(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + struct ctdb_control_ip_iface *pub); + +int ctdb_ctrl_gratious_arp(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + ctdb_sock_addr *addr, + const char *ifname); + +int ctdb_ctrl_get_tcp_tickles(struct ctdb_context *ctdb, + struct timeval timeout, + uint32_t destnode, + TALLOC_CTX *mem_ctx, + ctdb_sock_addr *addr, + struct ctdb_control_tcp_tickle_list **list); + + +int32_t ctdb_control_register_server_id(struct ctdb_context *ctdb, + uint32_t client_id, + TDB_DATA indata); +int32_t ctdb_control_check_server_id(struct ctdb_context *ctdb, + TDB_DATA indata); +int32_t ctdb_control_unregister_server_id(struct ctdb_context *ctdb, + TDB_DATA indata); +int32_t ctdb_control_get_server_id_list(struct ctdb_context *ctdb, + TDB_DATA *outdata); +int32_t ctdb_control_uptime(struct ctdb_context *ctdb, + TDB_DATA *outdata); + +int ctdb_attach_databases(struct ctdb_context *ctdb); + +int32_t ctdb_control_persistent_store(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA recdata, bool *async_reply); +int32_t ctdb_control_update_record(struct ctdb_context *ctdb, + struct ctdb_req_control *c, TDB_DATA recdata, + bool *async_reply); +int32_t ctdb_control_trans2_commit(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA recdata, bool *async_reply); + +int32_t ctdb_control_trans3_commit(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA recdata, bool *async_reply); + +void ctdb_persistent_finish_trans3_commits(struct ctdb_context *ctdb); + +int32_t ctdb_control_transaction_start(struct ctdb_context *ctdb, uint32_t id); +int32_t ctdb_control_transaction_commit(struct ctdb_context *ctdb, uint32_t id); +int32_t ctdb_control_transaction_cancel(struct ctdb_context *ctdb); +int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_db_set_healthy(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_db_get_health(struct ctdb_context *ctdb, + TDB_DATA indata, + TDB_DATA *outdata); + + +int ctdb_vacuum(struct ctdb_context *ctdb, int argc, const char **argv); +int ctdb_repack(struct ctdb_context *ctdb, int argc, const char **argv); + +void ctdb_block_signal(int signum); +void ctdb_unblock_signal(int signum); +int32_t ctdb_monitoring_mode(struct ctdb_context *ctdb); +int ctdb_set_child_logging(struct ctdb_context *ctdb); +void ctdb_lockdown_memory(struct ctdb_context *ctdb); + +typedef void (*client_async_callback)(struct ctdb_context *ctdb, uint32_t node_pnn, int32_t res, TDB_DATA outdata, void *callback_data); + +struct client_async_data { + enum ctdb_controls opcode; + bool dont_log_errors; + uint32_t count; + uint32_t fail_count; + client_async_callback callback; + client_async_callback fail_callback; + void *callback_data; +}; +void ctdb_client_async_add(struct client_async_data *data, struct ctdb_client_control_state *state); +int ctdb_client_async_wait(struct ctdb_context *ctdb, struct client_async_data *data); +int ctdb_client_async_control(struct ctdb_context *ctdb, + enum ctdb_controls opcode, + uint32_t *nodes, + uint64_t srvid, + struct timeval timeout, + bool dont_log_errors, + TDB_DATA data, + client_async_callback client_callback, + client_async_callback fail_callback, + void *callback_data); + +void ctdb_load_nodes_file(struct ctdb_context *ctdb); + +int ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode); + +int32_t ctdb_dump_memory(struct ctdb_context *ctdb, TDB_DATA *outdata); +int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata); + +int32_t ctdb_control_trans2_finished(struct ctdb_context *ctdb, + struct ctdb_req_control *c); +int32_t ctdb_control_trans2_error(struct ctdb_context *ctdb, + struct ctdb_req_control *c); +int32_t ctdb_control_trans2_active(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + uint32_t db_id); + +char *ctdb_addr_to_str(ctdb_sock_addr *addr); +unsigned ctdb_addr_to_port(ctdb_sock_addr *addr); +void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip); + +int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb); +int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata); + +extern int script_log_level; +extern bool fast_start; + +int32_t ctdb_control_get_event_script_status(struct ctdb_context *ctdb, + uint32_t call_type, + TDB_DATA *outdata); + +int ctdb_log_event_script_output(struct ctdb_context *ctdb, char *str, uint16_t len); +int ctdb_ctrl_report_recd_lock_latency(struct ctdb_context *ctdb, struct timeval timeout, double latency); + +int32_t ctdb_control_stop_node(struct ctdb_context *ctdb, struct ctdb_req_control *c, bool *async_reply); +int32_t ctdb_control_continue_node(struct ctdb_context *ctdb); + +void ctdb_stop_vacuuming(struct ctdb_context *ctdb); +int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db); + +int32_t ctdb_control_enable_script(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_disable_script(struct ctdb_context *ctdb, TDB_DATA indata); + +int32_t ctdb_local_node_got_banned(struct ctdb_context *ctdb); +int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata); +int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata); +int32_t ctdb_control_set_db_priority(struct ctdb_context *ctdb, TDB_DATA indata); +void ctdb_ban_self(struct ctdb_context *ctdb); + +int32_t ctdb_control_register_notify(struct ctdb_context *ctdb, uint32_t client_id, TDB_DATA indata); + +int32_t ctdb_control_deregister_notify(struct ctdb_context *ctdb, uint32_t client_id, TDB_DATA indata); + +int start_syslog_daemon(struct ctdb_context *ctdb); + +/* Where to send the log messages back to */ +struct ctdb_get_log_addr { + uint32_t pnn; + uint64_t srvid; + int32_t level; +}; + +extern int log_ringbuf_size; + +int32_t ctdb_control_get_log(struct ctdb_context *ctdb, TDB_DATA addr); +int32_t ctdb_control_clear_log(struct ctdb_context *ctdb); + + +struct ctdb_log_state *ctdb_fork_with_logging(TALLOC_CTX *mem_ctx, + struct ctdb_context *ctdb, + const char *log_prefix, + void (*logfn)(const char *, uint16_t, void *), + void *logfn_private, pid_t *pid); + +int32_t ctdb_control_process_exists(struct ctdb_context *ctdb, pid_t pid); +struct ctdb_client *ctdb_find_client_by_pid(struct ctdb_context *ctdb, pid_t pid); + +int32_t ctdb_control_get_db_seqnum(struct ctdb_context *ctdb, + TDB_DATA indata, + TDB_DATA *outdata); + +int ctdb_load_persistent_health(struct ctdb_context *ctdb, + struct ctdb_db_context *ctdb_db); +int ctdb_update_persistent_health(struct ctdb_context *ctdb, + struct ctdb_db_context *ctdb_db, + const char *reason,/* NULL means healthy */ + int num_healthy_nodes); +int ctdb_recheck_persistent_health(struct ctdb_context *ctdb); + +void ctdb_run_notification_script(struct ctdb_context *ctdb, const char *event); + +void ctdb_fault_setup(void); + +int verify_remote_ip_allocation(struct ctdb_context *ctdb, + struct ctdb_all_public_ips *ips); +int update_ip_assignment_tree(struct ctdb_context *ctdb, + struct ctdb_public_ip *ip); + +int ctdb_init_tevent_logging(struct ctdb_context *ctdb); + +int ctdb_statistics_init(struct ctdb_context *ctdb); + +int32_t ctdb_control_get_stat_history(struct ctdb_context *ctdb, + struct ctdb_req_control *c, + TDB_DATA *outdata); + +int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb); + +int ctdb_process_deferred_attach(struct ctdb_context *ctdb); + +/** + * structure to pass to a schedule_for_deletion_control + */ +struct ctdb_control_schedule_for_deletion { + uint32_t db_id; + struct ctdb_ltdb_header hdr; + uint32_t keylen; + uint8_t key[1]; /* key[] */ +}; + +int32_t ctdb_control_schedule_for_deletion(struct ctdb_context *ctdb, + TDB_DATA indata); + + +int32_t ctdb_local_schedule_for_deletion(struct ctdb_db_context *ctdb_db, + const struct ctdb_ltdb_header *hdr, + TDB_DATA key); + +void ctdb_local_remove_from_delete_queue(struct ctdb_db_context *ctdb_db, + const struct ctdb_ltdb_header *hdr, + const TDB_DATA key); + +struct ctdb_ltdb_header *ctdb_header_from_record_handle(struct ctdb_record_handle *h); + +/* For unit testing ctdb_transaction.c. */ +struct ctdb_public_ip_list { + struct ctdb_public_ip_list *next; + uint32_t pnn; + ctdb_sock_addr addr; +}; +int ctdb_trackingdb_add_pnn(struct ctdb_context *ctdb, TDB_DATA *data, uint32_t pnn); + +typedef void (*ctdb_trackingdb_cb)(struct ctdb_context *ctdb, uint32_t pnn, void *private_data); + +void ctdb_trackingdb_traverse(struct ctdb_context *ctdb, TDB_DATA data, ctdb_trackingdb_cb cb, void *private_data); + +int ctdb_start_revoke_ro_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, TDB_DATA key, struct ctdb_ltdb_header *header, TDB_DATA data); + +typedef void (*deferred_requeue_fn)(void *call_context, struct ctdb_req_header *hdr); + +int ctdb_add_revoke_deferred_call(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, TDB_DATA key, struct ctdb_req_header *hdr, deferred_requeue_fn fn, void *call_context); + +int ctdb_set_db_readonly(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db); + +int ctdb_null_func(struct ctdb_call_info *call); + +int ctdb_fetch_func(struct ctdb_call_info *call); + +int ctdb_fetch_with_header_func(struct ctdb_call_info *call); + +int32_t ctdb_control_get_db_statistics(struct ctdb_context *ctdb, + uint32_t db_id, + TDB_DATA *outdata); + +int ctdb_set_db_sticky(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db); + +/* + description for a message to reload all ips via recovery master/daemon + */ +struct reloadips_all_reply { + uint32_t pnn; + uint64_t srvid; +}; + +int32_t ctdb_control_reload_public_ips(struct ctdb_context *ctdb, struct ctdb_req_control *c, bool *async_reply); + +int ctdb_start_monitoring_interfaces(struct ctdb_context *ctdb); + +#endif diff --git a/ctdb/include/ctdb_protocol.h b/ctdb/include/ctdb_protocol.h new file mode 100644 index 0000000000..33187c7842 --- /dev/null +++ b/ctdb/include/ctdb_protocol.h @@ -0,0 +1,741 @@ +/* + ctdb database library + + Copyright (C) Andrew Tridgell 2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CTDB_PROTOCOL_H +#define _CTDB_PROTOCOL_H + +/* location of daemon socket */ +#define CTDB_PATH "/tmp/ctdb.socket" + +/* default ctdb port number */ +#define CTDB_PORT 4379 + +/* we must align packets to ensure ctdb works on all architectures (eg. sparc) */ +#define CTDB_DS_ALIGNMENT 8 + + +#define CTDB_NULL_FUNC 0xFF000001 +#define CTDB_FETCH_FUNC 0xFF000002 +#define CTDB_FETCH_WITH_HEADER_FUNC 0xFF000003 + + +struct ctdb_call { + int call_id; + TDB_DATA key; + TDB_DATA call_data; + TDB_DATA reply_data; + uint32_t status; +#define CTDB_IMMEDIATE_MIGRATION 0x00000001 +#define CTDB_CALL_FLAG_VACUUM_MIGRATION 0x00000002 +#define CTDB_WANT_READONLY 0x00000004 + uint32_t flags; +}; + +/* + structure passed to a ctdb call backend function +*/ +struct ctdb_call_info { + TDB_DATA key; /* record key */ + struct ctdb_ltdb_header *header; + TDB_DATA record_data; /* current data in the record */ + TDB_DATA *new_data; /* optionally updated record data */ + TDB_DATA *call_data; /* optionally passed from caller */ + TDB_DATA *reply_data; /* optionally returned by function */ + uint32_t status; /* optional reply status - defaults to zero */ +}; + +#define CTDB_ERR_INVALID 1 +#define CTDB_ERR_NOMEM 2 + +/* + ctdb flags +*/ +#define CTDB_FLAG_TORTURE (1<<1) + +/* + a message handler ID meaning "give me all messages" + */ +#define CTDB_SRVID_ALL (~(uint64_t)0) + +/* + srvid type : RECOVERY +*/ +#define CTDB_SRVID_RECOVERY 0xF100000000000000LL + +/* + a message handler ID meaning that the cluster has been reconfigured + */ +#define CTDB_SRVID_RECONFIGURE 0xF200000000000000LL + +/* + a message handler ID meaning that an IP address has been released + */ +#define CTDB_SRVID_RELEASE_IP 0xF300000000000000LL + +/* + a message handler ID meaning that an IP address has been taken + */ +#define CTDB_SRVID_TAKE_IP 0xF301000000000000LL + +/* + a message ID to set the node flags in the recovery daemon + */ +#define CTDB_SRVID_SET_NODE_FLAGS 0xF400000000000000LL + +/* + a message ID to ask the recovery daemon to update the expected node + assignment for a public ip + */ +#define CTDB_SRVID_RECD_UPDATE_IP 0xF500000000000000LL + +/* + a message to tell the recovery daemon to fetch a set of records + */ +#define CTDB_SRVID_VACUUM_FETCH 0xF700000000000000LL + +/* + a message to tell the recovery daemon to write a talloc memdump + to the log + */ +#define CTDB_SRVID_MEM_DUMP 0xF800000000000000LL + +/* + a message ID to get the recovery daemon to push the node flags out + */ +#define CTDB_SRVID_PUSH_NODE_FLAGS 0xF900000000000000LL + +/* + a message ID to get the recovery daemon to reload the nodes file + */ +#define CTDB_SRVID_RELOAD_NODES 0xFA00000000000000LL + +/* + a message ID to get the recovery daemon to perform a takeover run + */ +#define CTDB_SRVID_TAKEOVER_RUN 0xFB00000000000000LL + +/* request recovery daemon to rebalance ips for a node. + input is uint32_t for the node id. +*/ +#define CTDB_SRVID_REBALANCE_NODE 0xFB01000000000000LL + +/* + a message handler ID meaning to ask recovery master to reload all ips + */ +#define CTDB_SRVID_RELOAD_ALL_IPS 0xFB02000000000000LL + +/* A message id to ask the recovery daemon to temporarily disable the + public ip checks +*/ +#define CTDB_SRVID_DISABLE_IP_CHECK 0xFC00000000000000LL + +/* A dummy port used for sending back ipreallocate resposnes to the main + daemon +*/ +#define CTDB_SRVID_TAKEOVER_RUN_RESPONSE 0xFD00000000000000LL + +/* A range of ports reserved for registering a PID (top 8 bits) + * All ports matching the 8 top bits are reserved for exclusive use by + * registering a SRVID that matches the process-id of the requesting process + */ +#define CTDB_SRVID_PID_RANGE 0x0000000000000000LL + +/* A range of ports reserved for samba (top 8 bits) + * All ports matching the 8 top bits are reserved for exclusive use by + * CIFS server + */ +#define CTDB_SRVID_SAMBA_NOTIFY 0xFE00000000000000LL +#define CTDB_SRVID_SAMBA_RANGE 0xFE00000000000000LL + +/* A range of ports reserved for a CTDB NFS server (top 8 bits) + * All ports matching the 8 top bits are reserved for exclusive use by + * NFS server + */ +#define CTDB_SRVID_NFSD_RANGE 0xEE00000000000000LL + +/* A range of ports reserved for a CTDB ISCSI server (top 8 bits) + * All ports matching the 8 top bits are reserved for exclusive use by + * ISCSI server + */ +#define CTDB_SRVID_ISCSID_RANGE 0xDE00000000000000LL + +/* A range of ports reserved for testing (top 8 bits) + * All ports matching the 8 top bits are reserved for exclusive use by + * test applications + */ +#define CTDB_SRVID_TEST_RANGE 0xCE00000000000000LL + +/* Range of ports reserved for traversals */ +#define CTDB_SRVID_TRAVERSE_RANGE 0xBE00000000000000LL + +/* used on the domain socket, send a pdu to the local daemon */ +#define CTDB_CURRENT_NODE 0xF0000001 +/* send a broadcast to all nodes in the cluster, active or not */ +#define CTDB_BROADCAST_ALL 0xF0000002 +/* send a broadcast to all nodes in the current vnn map */ +#define CTDB_BROADCAST_VNNMAP 0xF0000003 +/* send a broadcast to all connected nodes */ +#define CTDB_BROADCAST_CONNECTED 0xF0000004 +/* send a broadcast to selected connected nodes */ +#define CTDB_MULTICAST 0xF0000005 + +/* the key used for transaction locking on persistent databases */ +#define CTDB_TRANSACTION_LOCK_KEY "__transaction_lock__" + +/* the key used to store persistent db sequence number */ +#define CTDB_DB_SEQNUM_KEY "__db_sequence_number__" + +#define MONITOR_SCRIPT_OK 0 +#define MONITOR_SCRIPT_TIMEOUT 1 + +#define MAX_SCRIPT_NAME 31 +#define MAX_SCRIPT_OUTPUT 511 +struct ctdb_script_wire { + char name[MAX_SCRIPT_NAME+1]; + struct timeval start; + struct timeval finished; + int32_t status; + char output[MAX_SCRIPT_OUTPUT+1]; +}; + +struct ctdb_scripts_wire { + uint32_t num_scripts; + struct ctdb_script_wire scripts[1]; +}; + +/* different calls to event scripts. */ +enum ctdb_eventscript_call { + CTDB_EVENT_INIT, /* CTDB starting up: no args */ + CTDB_EVENT_SETUP, /* CTDB starting up after transport is readdy: no args. */ + CTDB_EVENT_STARTUP, /* CTDB starting up after initial recovery: no args. */ + CTDB_EVENT_START_RECOVERY, /* CTDB recovery starting: no args. */ + CTDB_EVENT_RECOVERED, /* CTDB recovery finished: no args. */ + CTDB_EVENT_TAKE_IP, /* IP taken: interface, IP address, netmask bits. */ + CTDB_EVENT_RELEASE_IP, /* IP released: interface, IP address, netmask bits. */ + CTDB_EVENT_STOPPED, /* This node is stopped: no args. */ + CTDB_EVENT_MONITOR, /* Please check if service is healthy: no args. */ + CTDB_EVENT_STATUS, /* Report service status: no args. */ + CTDB_EVENT_SHUTDOWN, /* CTDB shutting down: no args. */ + CTDB_EVENT_RELOAD, /* magic */ + CTDB_EVENT_UPDATE_IP, /* IP updating: old interface, new interface, IP address, netmask bits. */ + CTDB_EVENT_IPREALLOCATED, /* when a takeover_run() completes */ + CTDB_EVENT_MAX +}; + +/* Mapping from enum to names. */ +extern const char *ctdb_eventscript_call_names[]; + +/* + operation IDs +*/ +enum ctdb_operation { + CTDB_REQ_CALL = 0, + CTDB_REPLY_CALL = 1, + CTDB_REQ_DMASTER = 2, + CTDB_REPLY_DMASTER = 3, + CTDB_REPLY_ERROR = 4, + CTDB_REQ_MESSAGE = 5, + /* #6 removed */ + CTDB_REQ_CONTROL = 7, + CTDB_REPLY_CONTROL = 8, + CTDB_REQ_KEEPALIVE = 9, +}; + +#define CTDB_MAGIC 0x43544442 /* CTDB */ +#define CTDB_VERSION 1 + +enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS = 0, + CTDB_CONTROL_STATISTICS = 1, + /* #2 removed */ + CTDB_CONTROL_PING = 3, + CTDB_CONTROL_GETDBPATH = 4, + CTDB_CONTROL_GETVNNMAP = 5, + CTDB_CONTROL_SETVNNMAP = 6, + CTDB_CONTROL_GET_DEBUG = 7, + CTDB_CONTROL_SET_DEBUG = 8, + CTDB_CONTROL_GET_DBMAP = 9, + CTDB_CONTROL_GET_NODEMAPv4 = 10, /* obsolete */ + CTDB_CONTROL_SET_DMASTER = 11, + /* #12 removed */ + CTDB_CONTROL_PULL_DB = 13, + CTDB_CONTROL_PUSH_DB = 14, + CTDB_CONTROL_GET_RECMODE = 15, + CTDB_CONTROL_SET_RECMODE = 16, + CTDB_CONTROL_STATISTICS_RESET = 17, + CTDB_CONTROL_DB_ATTACH = 18, + CTDB_CONTROL_SET_CALL = 19, + CTDB_CONTROL_TRAVERSE_START = 20, + CTDB_CONTROL_TRAVERSE_ALL = 21, + CTDB_CONTROL_TRAVERSE_DATA = 22, + CTDB_CONTROL_REGISTER_SRVID = 23, + CTDB_CONTROL_DEREGISTER_SRVID = 24, + CTDB_CONTROL_GET_DBNAME = 25, + CTDB_CONTROL_ENABLE_SEQNUM = 26, + CTDB_CONTROL_UPDATE_SEQNUM = 27, + /* #28 removed */ + CTDB_CONTROL_DUMP_MEMORY = 29, + CTDB_CONTROL_GET_PID = 30, + CTDB_CONTROL_GET_RECMASTER = 31, + CTDB_CONTROL_SET_RECMASTER = 32, + CTDB_CONTROL_FREEZE = 33, + CTDB_CONTROL_THAW = 34, + CTDB_CONTROL_GET_PNN = 35, + CTDB_CONTROL_SHUTDOWN = 36, + CTDB_CONTROL_GET_MONMODE = 37, + /* #38 removed */ + /* #39 removed */ + /* #40 removed */ + /* #41 removed */ + CTDB_CONTROL_TAKEOVER_IPv4 = 42, /* obsolete */ + CTDB_CONTROL_RELEASE_IPv4 = 43, /* obsolete */ + CTDB_CONTROL_TCP_CLIENT = 44, + CTDB_CONTROL_TCP_ADD = 45, + CTDB_CONTROL_TCP_REMOVE = 46, + CTDB_CONTROL_STARTUP = 47, + CTDB_CONTROL_SET_TUNABLE = 48, + CTDB_CONTROL_GET_TUNABLE = 49, + CTDB_CONTROL_LIST_TUNABLES = 50, + CTDB_CONTROL_GET_PUBLIC_IPSv4 = 51, /* obsolete */ + CTDB_CONTROL_MODIFY_FLAGS = 52, + CTDB_CONTROL_GET_ALL_TUNABLES = 53, + CTDB_CONTROL_KILL_TCP = 54, + CTDB_CONTROL_GET_TCP_TICKLE_LIST = 55, + CTDB_CONTROL_SET_TCP_TICKLE_LIST = 56, + CTDB_CONTROL_REGISTER_SERVER_ID = 57, + CTDB_CONTROL_UNREGISTER_SERVER_ID = 58, + CTDB_CONTROL_CHECK_SERVER_ID = 59, + CTDB_CONTROL_GET_SERVER_ID_LIST = 60, + CTDB_CONTROL_DB_ATTACH_PERSISTENT = 61, + CTDB_CONTROL_PERSISTENT_STORE = 62, + CTDB_CONTROL_UPDATE_RECORD = 63, + CTDB_CONTROL_SEND_GRATIOUS_ARP = 64, + CTDB_CONTROL_TRANSACTION_START = 65, + CTDB_CONTROL_TRANSACTION_COMMIT = 66, + CTDB_CONTROL_WIPE_DATABASE = 67, + /* #68 removed */ + CTDB_CONTROL_UPTIME = 69, + CTDB_CONTROL_START_RECOVERY = 70, + CTDB_CONTROL_END_RECOVERY = 71, + CTDB_CONTROL_RELOAD_NODES_FILE = 72, + /* #73 removed */ + CTDB_CONTROL_TRY_DELETE_RECORDS = 74, + CTDB_CONTROL_ENABLE_MONITOR = 75, + CTDB_CONTROL_DISABLE_MONITOR = 76, + CTDB_CONTROL_ADD_PUBLIC_IP = 77, + CTDB_CONTROL_DEL_PUBLIC_IP = 78, + CTDB_CONTROL_RUN_EVENTSCRIPTS = 79, + CTDB_CONTROL_GET_CAPABILITIES = 80, + CTDB_CONTROL_START_PERSISTENT_UPDATE = 81, + CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE= 82, + CTDB_CONTROL_TRANS2_COMMIT = 83, + CTDB_CONTROL_TRANS2_FINISHED = 84, + CTDB_CONTROL_TRANS2_ERROR = 85, + CTDB_CONTROL_TRANS2_COMMIT_RETRY = 86, + CTDB_CONTROL_RECD_PING = 87, + CTDB_CONTROL_RELEASE_IP = 88, + CTDB_CONTROL_TAKEOVER_IP = 89, + CTDB_CONTROL_GET_PUBLIC_IPS = 90, + CTDB_CONTROL_GET_NODEMAP = 91, + CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS = 96, + CTDB_CONTROL_TRAVERSE_KILL = 97, + CTDB_CONTROL_RECD_RECLOCK_LATENCY = 98, + CTDB_CONTROL_GET_RECLOCK_FILE = 99, + CTDB_CONTROL_SET_RECLOCK_FILE = 100, + CTDB_CONTROL_STOP_NODE = 101, + CTDB_CONTROL_CONTINUE_NODE = 102, + CTDB_CONTROL_SET_NATGWSTATE = 103, + CTDB_CONTROL_SET_LMASTERROLE = 104, + CTDB_CONTROL_SET_RECMASTERROLE = 105, + CTDB_CONTROL_ENABLE_SCRIPT = 107, + CTDB_CONTROL_DISABLE_SCRIPT = 108, + CTDB_CONTROL_SET_BAN_STATE = 109, + CTDB_CONTROL_GET_BAN_STATE = 110, + CTDB_CONTROL_SET_DB_PRIORITY = 111, + CTDB_CONTROL_GET_DB_PRIORITY = 112, + CTDB_CONTROL_TRANSACTION_CANCEL = 113, + CTDB_CONTROL_REGISTER_NOTIFY = 114, + CTDB_CONTROL_DEREGISTER_NOTIFY = 115, + CTDB_CONTROL_TRANS2_ACTIVE = 116, + CTDB_CONTROL_GET_LOG = 117, + CTDB_CONTROL_CLEAR_LOG = 118, + CTDB_CONTROL_TRANS3_COMMIT = 119, + CTDB_CONTROL_GET_DB_SEQNUM = 120, + CTDB_CONTROL_DB_SET_HEALTHY = 121, + CTDB_CONTROL_DB_GET_HEALTH = 122, + CTDB_CONTROL_GET_PUBLIC_IP_INFO = 123, + CTDB_CONTROL_GET_IFACES = 124, + CTDB_CONTROL_SET_IFACE_LINK_STATE = 125, + CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE = 126, + CTDB_CONTROL_GET_STAT_HISTORY = 127, + CTDB_CONTROL_SCHEDULE_FOR_DELETION = 128, + CTDB_CONTROL_SET_DB_READONLY = 129, + CTDB_CONTROL_CHECK_SRVIDS = 130, + CTDB_CONTROL_TRAVERSE_START_EXT = 131, + CTDB_CONTROL_GET_DB_STATISTICS = 132, + CTDB_CONTROL_SET_DB_STICKY = 133, + CTDB_CONTROL_RELOAD_PUBLIC_IPS = 134, +}; + +/* + packet structures +*/ +struct ctdb_req_header { + uint32_t length; + uint32_t ctdb_magic; + uint32_t ctdb_version; + uint32_t generation; + uint32_t operation; + uint32_t destnode; + uint32_t srcnode; + uint32_t reqid; +}; + +struct ctdb_req_call { + struct ctdb_req_header hdr; + uint32_t flags; + uint32_t db_id; + uint32_t callid; + uint32_t hopcount; + uint32_t keylen; + uint32_t calldatalen; + uint8_t data[1]; /* key[] followed by calldata[] */ +}; + +struct ctdb_reply_call { + struct ctdb_req_header hdr; + uint32_t status; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_reply_error { + struct ctdb_req_header hdr; + uint32_t status; + uint32_t msglen; + uint8_t msg[1]; +}; + +struct ctdb_req_dmaster { + struct ctdb_req_header hdr; + uint32_t db_id; + uint64_t rsn; + uint32_t dmaster; + uint32_t keylen; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_reply_dmaster { + struct ctdb_req_header hdr; + uint32_t db_id; + uint64_t rsn; + uint32_t keylen; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_req_message { + struct ctdb_req_header hdr; + uint64_t srvid; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_req_getdbpath { + struct ctdb_req_header hdr; + uint32_t db_id; +}; + +struct ctdb_reply_getdbpath { + struct ctdb_req_header hdr; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_req_control { + struct ctdb_req_header hdr; + uint32_t opcode; + uint32_t pad; + uint64_t srvid; + uint32_t client_id; +#define CTDB_CTRL_FLAG_NOREPLY 1 +#define CTDB_CTRL_FLAG_OPCODE_SPECIFIC 0xFFFF0000 + uint32_t flags; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_reply_control { + struct ctdb_req_header hdr; + int32_t status; + uint32_t datalen; + uint32_t errorlen; + uint8_t data[1]; +}; + +struct ctdb_req_keepalive { + struct ctdb_req_header hdr; +}; + + +/* types of failures possible from TRANS2_COMMIT */ +enum ctdb_trans2_commit_error { + CTDB_TRANS2_COMMIT_SUCCESS=0, /* all nodes committed successfully */ + CTDB_TRANS2_COMMIT_TIMEOUT=1, /* at least one node timed out */ + CTDB_TRANS2_COMMIT_ALLFAIL=2, /* all nodes failed the commit */ + CTDB_TRANS2_COMMIT_SOMEFAIL=3 /* some nodes failed the commit, some allowed it */ +}; + +/* + the extended header for records in the ltdb +*/ +struct ctdb_ltdb_header { + uint64_t rsn; + uint32_t dmaster; + uint16_t laccessor; + uint16_t lacount; +#define CTDB_REC_FLAG_DEFAULT 0x00000000 +#define CTDB_REC_FLAG_MIGRATED_WITH_DATA 0x00010000 +#define CTDB_REC_FLAG_VACUUM_MIGRATED 0x00020000 +#define CTDB_REC_FLAG_AUTOMATIC 0x00040000 +#define CTDB_REC_RO_HAVE_DELEGATIONS 0x01000000 +#define CTDB_REC_RO_HAVE_READONLY 0x02000000 +#define CTDB_REC_RO_REVOKING_READONLY 0x04000000 +#define CTDB_REC_RO_REVOKE_COMPLETE 0x08000000 + uint32_t flags; +}; + + +/* + definitions for different socket structures + */ +typedef struct sockaddr_in ctdb_addr_in; +typedef struct sockaddr_in6 ctdb_addr_in6; +typedef union { + struct sockaddr sa; + ctdb_addr_in ip; + ctdb_addr_in6 ip6; +} ctdb_sock_addr; + +/* + A structure describing a single node, its flags and its address +*/ +struct ctdb_node_and_flags { + uint32_t pnn; + uint32_t flags; + ctdb_sock_addr addr; +}; + + +/* + Structure used for a nodemap. + The nodemap is the structure containing a list of all nodes + known to the cluster and their associated flags. +*/ +struct ctdb_node_map { + uint32_t num; + struct ctdb_node_and_flags nodes[1]; +}; + +/* + * Node flags + */ +#define NODE_FLAGS_DISCONNECTED 0x00000001 /* node isn't connected */ +#define NODE_FLAGS_UNHEALTHY 0x00000002 /* monitoring says node is unhealthy */ +#define NODE_FLAGS_PERMANENTLY_DISABLED 0x00000004 /* administrator has disabled node */ +#define NODE_FLAGS_BANNED 0x00000008 /* recovery daemon has banned the node */ +#define NODE_FLAGS_DELETED 0x00000010 /* this node has been deleted */ +#define NODE_FLAGS_STOPPED 0x00000020 /* this node has been stopped */ +#define NODE_FLAGS_DISABLED (NODE_FLAGS_UNHEALTHY|NODE_FLAGS_PERMANENTLY_DISABLED) +#define NODE_FLAGS_INACTIVE (NODE_FLAGS_DELETED|NODE_FLAGS_DISCONNECTED|NODE_FLAGS_BANNED|NODE_FLAGS_STOPPED) + +#define NODE_FLAGS_NOIPTAKEOVER 0x01000000 /* this node can takeover any new ip addresses, this flag is ONLY valid within the recovery daemon */ + + +struct ctdb_public_ip { + uint32_t pnn; + ctdb_sock_addr addr; +}; + +struct ctdb_all_public_ips { + uint32_t num; + struct ctdb_public_ip ips[1]; +}; + + +struct latency_counter { + int num; + double min; + double max; + double total; +}; + +/* + structure used to pass record data between the child and parent + */ +struct ctdb_rec_data { + uint32_t length; + uint32_t reqid; + uint32_t keylen; + uint32_t datalen; + uint8_t data[1]; +}; + +struct ctdb_traverse_start { + uint32_t db_id; + uint32_t reqid; + uint64_t srvid; +}; + +struct ctdb_traverse_start_ext { + uint32_t db_id; + uint32_t reqid; + uint64_t srvid; + bool withemptyrecords; +}; + +/* + ctdb statistics information + */ +#define MAX_COUNT_BUCKETS 16 +#define MAX_HOT_KEYS 10 + +struct ctdb_statistics { + uint32_t num_clients; + uint32_t frozen; + uint32_t recovering; + uint32_t client_packets_sent; + uint32_t client_packets_recv; + uint32_t node_packets_sent; + uint32_t node_packets_recv; + uint32_t keepalive_packets_sent; + uint32_t keepalive_packets_recv; + struct { + uint32_t req_call; + uint32_t reply_call; + uint32_t req_dmaster; + uint32_t reply_dmaster; + uint32_t reply_error; + uint32_t req_message; + uint32_t req_control; + uint32_t reply_control; + } node; + struct { + uint32_t req_call; + uint32_t req_message; + uint32_t req_control; + } client; + struct { + uint32_t call; + uint32_t control; + uint32_t traverse; + } timeouts; + struct { + struct latency_counter ctdbd; + struct latency_counter recd; + } reclock; + uint32_t total_calls; + uint32_t pending_calls; + uint32_t lockwait_calls; + uint32_t pending_lockwait_calls; + uint32_t childwrite_calls; + uint32_t pending_childwrite_calls; + uint32_t memory_used; + uint32_t __last_counter; /* hack for control_statistics_all */ + uint32_t max_hop_count; + uint32_t hop_count_bucket[MAX_COUNT_BUCKETS]; + struct latency_counter call_latency; + struct latency_counter lockwait_latency; + struct latency_counter childwrite_latency; + uint32_t num_recoveries; + struct timeval statistics_start_time; + struct timeval statistics_current_time; + uint32_t total_ro_delegations; + uint32_t total_ro_revokes; +}; + +/* + * wire format for statistics history + */ +struct ctdb_statistics_wire { + uint32_t num; + struct ctdb_statistics stats[1]; +}; + +/* + * db statistics + */ +struct ctdb_db_hot_key { + uint32_t count; + TDB_DATA key; +}; +struct ctdb_db_statistics { + uint32_t db_ro_delegations; + uint32_t db_ro_revokes; + uint32_t hop_count_bucket[MAX_COUNT_BUCKETS]; + uint32_t num_hot_keys; + struct ctdb_db_hot_key hot_keys[MAX_HOT_KEYS]; +}; +struct ctdb_db_statistics_wire { + uint32_t db_ro_delegations; + uint32_t db_ro_revokes; + uint32_t hop_count_bucket[MAX_COUNT_BUCKETS]; + uint32_t num_hot_keys; + char hot_keys[1]; +}; + +/* + * wire format for interface list + */ +#ifdef IFNAMSIZ +#define CTDB_IFACE_SIZE IFNAMSIZ +#else +#define CTDB_IFACE_SIZE 16 +#endif + +struct ctdb_iface_info { + char name[CTDB_IFACE_SIZE+2]; + uint16_t link_state; + uint32_t references; +}; + +struct ctdb_ifaces_list { + uint32_t num; + struct ctdb_iface_info ifaces[1]; +}; + +#define INVALID_GENERATION 1 +/* table that contains the mapping between a hash value and lmaster + */ +struct ctdb_vnn_map { + uint32_t generation; + uint32_t size; + uint32_t *map; +}; + +/* + a wire representation of the vnn map + */ +struct ctdb_vnn_map_wire { + uint32_t generation; + uint32_t size; + uint32_t map[1]; +}; + +#endif diff --git a/ctdb/include/ctdb_typesafe_cb.h b/ctdb/include/ctdb_typesafe_cb.h new file mode 100644 index 0000000000..b1f2c5f5b5 --- /dev/null +++ b/ctdb/include/ctdb_typesafe_cb.h @@ -0,0 +1,177 @@ +#ifndef CCAN_CAST_IF_TYPE_H +#define CCAN_CAST_IF_TYPE_H + +#if (__GNUC__ >= 3) +#define HAVE_TYPEOF 1 +#define HAVE_BUILTIN_CHOOSE_EXPR 1 +#define HAVE_BUILTIN_TYPES_COMPATIBLE_P 1 +#endif + +#if HAVE_TYPEOF && HAVE_BUILTIN_CHOOSE_EXPR && HAVE_BUILTIN_TYPES_COMPATIBLE_P +/** + * cast_if_type - only cast an expression if test matches a given type + * @desttype: the type to cast to + * @expr: the expression to cast + * @test: the expression to test + * @oktype: the type we allow + * + * This macro is used to create functions which allow multiple types. + * The result of this macro is used somewhere that a @desttype type is + * expected: if @expr was of type @oktype, it will be cast to + * @desttype type. As a result, if @expr is any type other than + * @oktype or @desttype, a compiler warning will be issued. + * + * This macro can be used in static initializers. + * + * This is merely useful for warnings: if the compiler does not + * support the primitives required for cast_if_type(), it becomes an + * unconditional cast, and the @test and @oktype argument is not used. In + * particular, this means that @oktype can be a type which uses + * the "typeof": it will not be evaluated if typeof is not supported. + * + * Example: + * // We can take either an unsigned long or a void *. + * void _set_some_value(void *val); + * #define set_some_value(e) \ + * _set_some_value(cast_if_type(void *, (e), (e), unsigned long)) + */ +#define cast_if_type(desttype, expr, test, oktype) \ +__builtin_choose_expr(__builtin_types_compatible_p(typeof(1?(test):0), oktype), \ + (desttype)(expr), (expr)) +#else +#define cast_if_type(desttype, expr, test, oktype) ((desttype)(expr)) +#endif + +/** + * cast_if_any - only cast an expression if it is one of the three given types + * @desttype: the type to cast to + * @expr: the expression to cast + * @test: the expression to test + * @ok1: the first type we allow + * @ok2: the second type we allow + * @ok3: the third type we allow + * + * This is a convenient wrapper for multiple cast_if_type() calls. You can + * chain them inside each other (ie. use cast_if_any() for expr) if you need + * more than 3 arguments. + * + * Example: + * // We can take either a long, unsigned long, void * or a const void *. + * void _set_some_value(void *val); + * #define set_some_value(expr) \ + * _set_some_value(cast_if_any(void *, (expr), (expr), \ + * long, unsigned long, const void *)) + */ +#define cast_if_any(desttype, expr, test, ok1, ok2, ok3) \ + cast_if_type(desttype, \ + cast_if_type(desttype, \ + cast_if_type(desttype, (expr), (test), ok1), \ + ok2), \ + ok3) + +/** + * typesafe_cb - cast a callback function if it matches the arg + * @rtype: the return type of the callback function + * @fn: the callback function to cast + * @arg: the (pointer) argument to hand to the callback function. + * + * If a callback function takes a single argument, this macro does + * appropriate casts to a function which takes a single void * argument if the + * callback provided matches the @arg (or a const or volatile version). + * + * It is assumed that @arg is of pointer type: usually @arg is passed + * or assigned to a void * elsewhere anyway. + * + * Example: + * void _register_callback(void (*fn)(void *arg), void *arg); + * #define register_callback(fn, arg) \ + * _register_callback(typesafe_cb(void, (fn), (arg)), (arg)) + */ +#define typesafe_cb(rtype, fn, arg) \ + cast_if_type(rtype (*)(void *), (fn), (fn)(arg), rtype) + +/** + * typesafe_cb_const - cast a const callback function if it matches the arg + * @rtype: the return type of the callback function + * @fn: the callback function to cast + * @arg: the (pointer) argument to hand to the callback function. + * + * If a callback function takes a single argument, this macro does appropriate + * casts to a function which takes a single const void * argument if the + * callback provided matches the @arg. + * + * It is assumed that @arg is of pointer type: usually @arg is passed + * or assigned to a void * elsewhere anyway. + * + * Example: + * void _register_callback(void (*fn)(const void *arg), const void *arg); + * #define register_callback(fn, arg) \ + * _register_callback(typesafe_cb_const(void, (fn), (arg)), (arg)) + */ +#define typesafe_cb_const(rtype, fn, arg) \ + sizeof((fn)((const void *)0)), \ + cast_if_type(rtype (*)(const void *), \ + (fn), (fn)(arg), rtype (*)(typeof(arg))) + +/** + * typesafe_cb_preargs - cast a callback function if it matches the arg + * @rtype: the return type of the callback function + * @fn: the callback function to cast + * @arg: the (pointer) argument to hand to the callback function. + * + * This is a version of typesafe_cb() for callbacks that take other arguments + * before the @arg. + * + * Example: + * void _register_callback(void (*fn)(int, void *arg), void *arg); + * #define register_callback(fn, arg) \ + * _register_callback(typesafe_cb_preargs(void, (fn), (arg), int),\ + * (arg)) + */ +#define typesafe_cb_preargs(rtype, fn, arg, ...) \ + cast_if_type(rtype (*)(__VA_ARGS__, void *), (fn), (fn), \ + rtype (*)(__VA_ARGS__, typeof(arg))) +/** + * typesafe_cb_postargs - cast a callback function if it matches the arg + * @rtype: the return type of the callback function + * @fn: the callback function to cast + * @arg: the (pointer) argument to hand to the callback function. + * + * This is a version of typesafe_cb() for callbacks that take other arguments + * after the @arg. + * + * Example: + * void _register_callback(void (*fn)(void *arg, int), void *arg); + * #define register_callback(fn, arg) \ + * _register_callback(typesafe_cb_postargs(void, (fn), (arg), int),\ + * (arg)) + */ +#define typesafe_cb_postargs(rtype, fn, arg, ...) \ + cast_if_type(rtype (*)(void *, __VA_ARGS__), (fn), (fn), \ + rtype (*)(typeof(arg), __VA_ARGS__)) +/** + * typesafe_cb_cmp - cast a compare function if it matches the arg + * @rtype: the return type of the callback function + * @fn: the callback function to cast + * @arg: the (pointer) argument(s) to hand to the compare function. + * + * If a callback function takes two matching-type arguments, this macro does + * appropriate casts to a function which takes two const void * arguments if + * the callback provided takes two a const pointers to @arg. + * + * It is assumed that @arg is of pointer type: usually @arg is passed + * or assigned to a void * elsewhere anyway. Note also that the type + * arg points to must be defined. + * + * Example: + * void _my_qsort(void *base, size_t nmemb, size_t size, + * int (*cmp)(const void *, const void *)); + * #define my_qsort(base, nmemb, cmpfn) \ + * _my_qsort((base), (nmemb), sizeof(*(base)), \ + * typesafe_cb_cmp(int, (cmpfn), (base)), (arg)) + */ +#define typesafe_cb_cmp(rtype, cmpfn, arg) \ + cast_if_type(rtype (*)(const void *, const void *), (cmpfn), \ + rtype (*)(const typeof(*arg)*, const typeof(*arg)*)) + +#endif /* CCAN_CAST_IF_TYPE_H */ |