4 Copyright (C) Andrew Tridgell 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #ifndef _CTDB_PROTOCOL_H
21 #define _CTDB_PROTOCOL_H
23 /* location of daemon socket, set at configure time */
25 #define CTDB_PATH SOCKPATH
27 #define CTDB_PATH "/tmp/ctdb.socket"
30 /* default ctdb port number */
31 #define CTDB_PORT 4379
33 /* we must align packets to ensure ctdb works on all architectures (eg. sparc) */
34 #define CTDB_DS_ALIGNMENT 8
37 #define CTDB_NULL_FUNC 0xFF000001
38 #define CTDB_FETCH_FUNC 0xFF000002
39 #define CTDB_FETCH_WITH_HEADER_FUNC 0xFF000003
48 #define CTDB_IMMEDIATE_MIGRATION 0x00000001
49 #define CTDB_CALL_FLAG_VACUUM_MIGRATION 0x00000002
50 #define CTDB_WANT_READONLY 0x00000004
55 structure passed to a ctdb call backend function
57 struct ctdb_call_info {
58 TDB_DATA key; /* record key */
59 struct ctdb_ltdb_header *header;
60 TDB_DATA record_data; /* current data in the record */
61 TDB_DATA *new_data; /* optionally updated record data */
62 TDB_DATA *call_data; /* optionally passed from caller */
63 TDB_DATA *reply_data; /* optionally returned by function */
64 uint32_t status; /* optional reply status - defaults to zero */
67 #define CTDB_ERR_INVALID 1
68 #define CTDB_ERR_NOMEM 2
73 #define CTDB_FLAG_TORTURE (1<<1)
76 a message handler ID meaning "give me all messages"
78 #define CTDB_SRVID_ALL (~(uint64_t)0)
83 #define CTDB_SRVID_RECOVERY 0xF100000000000000LL
86 a message handler ID meaning that the cluster has been reconfigured
88 #define CTDB_SRVID_RECONFIGURE 0xF200000000000000LL
91 a message handler ID meaning that an IP address has been released
93 #define CTDB_SRVID_RELEASE_IP 0xF300000000000000LL
96 a message handler ID meaning that an IP address has been taken
98 #define CTDB_SRVID_TAKE_IP 0xF301000000000000LL
101 a message ID to set the node flags in the recovery daemon
103 #define CTDB_SRVID_SET_NODE_FLAGS 0xF400000000000000LL
106 a message ID to ask the recovery daemon to update the expected node
107 assignment for a public ip
109 #define CTDB_SRVID_RECD_UPDATE_IP 0xF500000000000000LL
112 a message to tell the recovery daemon to fetch a set of records
114 #define CTDB_SRVID_VACUUM_FETCH 0xF700000000000000LL
117 a message to tell the recovery daemon to write a talloc memdump
120 #define CTDB_SRVID_MEM_DUMP 0xF800000000000000LL
122 /* A message id used to ask the recover daemon to send logs
124 #define CTDB_SRVID_GETLOG 0xF801000000000000LL
126 /* A message id used to ask the recover daemon to send logs
128 #define CTDB_SRVID_CLEARLOG 0xF802000000000000LL
131 a message ID to get the recovery daemon to push the node flags out
133 #define CTDB_SRVID_PUSH_NODE_FLAGS 0xF900000000000000LL
136 a message ID to get the recovery daemon to reload the nodes file
138 #define CTDB_SRVID_RELOAD_NODES 0xFA00000000000000LL
141 a message ID to get the recovery daemon to perform a takeover run
143 #define CTDB_SRVID_TAKEOVER_RUN 0xFB00000000000000LL
145 /* request recovery daemon to rebalance ips for a node.
146 input is uint32_t for the node id.
148 #define CTDB_SRVID_REBALANCE_NODE 0xFB01000000000000LL
150 /* A message handler ID to stop takeover runs from occurring */
151 #define CTDB_SRVID_DISABLE_TAKEOVER_RUNS 0xFB03000000000000LL
153 /* A message id to ask the recovery daemon to temporarily disable the
156 #define CTDB_SRVID_DISABLE_IP_CHECK 0xFC00000000000000LL
158 /* A dummy port used for sending back ipreallocate resposnes to the main
161 #define CTDB_SRVID_TAKEOVER_RUN_RESPONSE 0xFD00000000000000LL
163 /* A range of ports reserved for registering a PID (top 8 bits)
164 * All ports matching the 8 top bits are reserved for exclusive use by
165 * registering a SRVID that matches the process-id of the requesting process
167 #define CTDB_SRVID_PID_RANGE 0x0000000000000000LL
169 /* A range of ports reserved for samba (top 8 bits)
170 * All ports matching the 8 top bits are reserved for exclusive use by
173 #define CTDB_SRVID_SAMBA_NOTIFY 0xFE00000000000000LL
174 #define CTDB_SRVID_SAMBA_RANGE 0xFE00000000000000LL
176 /* A range of ports reserved for a CTDB NFS server (top 8 bits)
177 * All ports matching the 8 top bits are reserved for exclusive use by
180 #define CTDB_SRVID_NFSD_RANGE 0xEE00000000000000LL
182 /* A range of ports reserved for a CTDB ISCSI server (top 8 bits)
183 * All ports matching the 8 top bits are reserved for exclusive use by
186 #define CTDB_SRVID_ISCSID_RANGE 0xDE00000000000000LL
188 /* A range of ports reserved for testing (top 8 bits)
189 * All ports matching the 8 top bits are reserved for exclusive use by
192 #define CTDB_SRVID_TEST_RANGE 0xCE00000000000000LL
194 /* Range of ports reserved for traversals */
195 #define CTDB_SRVID_TRAVERSE_RANGE 0xBE00000000000000LL
197 /* used on the domain socket, send a pdu to the local daemon */
198 #define CTDB_CURRENT_NODE 0xF0000001
199 /* send a broadcast to all nodes in the cluster, active or not */
200 #define CTDB_BROADCAST_ALL 0xF0000002
201 /* send a broadcast to all nodes in the current vnn map */
202 #define CTDB_BROADCAST_VNNMAP 0xF0000003
203 /* send a broadcast to all connected nodes */
204 #define CTDB_BROADCAST_CONNECTED 0xF0000004
205 /* send a broadcast to selected connected nodes */
206 #define CTDB_MULTICAST 0xF0000005
208 /* the key used for transaction locking on persistent databases */
209 #define CTDB_TRANSACTION_LOCK_KEY "__transaction_lock__"
211 /* the key used to store persistent db sequence number */
212 #define CTDB_DB_SEQNUM_KEY "__db_sequence_number__"
214 #define MONITOR_SCRIPT_OK 0
215 #define MONITOR_SCRIPT_TIMEOUT 1
217 #define MAX_SCRIPT_NAME 31
218 #define MAX_SCRIPT_OUTPUT 511
219 struct ctdb_script_wire {
220 char name[MAX_SCRIPT_NAME+1];
221 struct timeval start;
222 struct timeval finished;
224 char output[MAX_SCRIPT_OUTPUT+1];
227 struct ctdb_scripts_wire {
228 uint32_t num_scripts;
229 struct ctdb_script_wire scripts[1];
232 /* different calls to event scripts. */
233 enum ctdb_eventscript_call {
234 CTDB_EVENT_INIT, /* CTDB starting up: no args */
235 CTDB_EVENT_SETUP, /* CTDB starting up after transport is readdy: no args. */
236 CTDB_EVENT_STARTUP, /* CTDB starting up after initial recovery: no args. */
237 CTDB_EVENT_START_RECOVERY, /* CTDB recovery starting: no args. */
238 CTDB_EVENT_RECOVERED, /* CTDB recovery finished: no args. */
239 CTDB_EVENT_TAKE_IP, /* IP taken: interface, IP address, netmask bits. */
240 CTDB_EVENT_RELEASE_IP, /* IP released: interface, IP address, netmask bits. */
241 CTDB_EVENT_STOPPED, /* Deprecated, do not use. */
242 CTDB_EVENT_MONITOR, /* Please check if service is healthy: no args. */
243 CTDB_EVENT_STATUS, /* Report service status: no args. */
244 CTDB_EVENT_SHUTDOWN, /* CTDB shutting down: no args. */
245 CTDB_EVENT_RELOAD, /* magic */
246 CTDB_EVENT_UPDATE_IP, /* IP updating: old interface, new interface, IP address, netmask bits. */
247 CTDB_EVENT_IPREALLOCATED, /* when a takeover_run() completes */
251 /* Mapping from enum to names. */
252 extern const char *ctdb_eventscript_call_names[];
257 enum ctdb_operation {
260 CTDB_REQ_DMASTER = 2,
261 CTDB_REPLY_DMASTER = 3,
262 CTDB_REPLY_ERROR = 4,
263 CTDB_REQ_MESSAGE = 5,
265 CTDB_REQ_CONTROL = 7,
266 CTDB_REPLY_CONTROL = 8,
267 CTDB_REQ_KEEPALIVE = 9,
270 #define CTDB_MAGIC 0x43544442 /* CTDB */
271 #define CTDB_VERSION 1
273 enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS = 0,
274 CTDB_CONTROL_STATISTICS = 1,
276 CTDB_CONTROL_PING = 3,
277 CTDB_CONTROL_GETDBPATH = 4,
278 CTDB_CONTROL_GETVNNMAP = 5,
279 CTDB_CONTROL_SETVNNMAP = 6,
280 CTDB_CONTROL_GET_DEBUG = 7,
281 CTDB_CONTROL_SET_DEBUG = 8,
282 CTDB_CONTROL_GET_DBMAP = 9,
283 CTDB_CONTROL_GET_NODEMAPv4 = 10, /* obsolete */
284 CTDB_CONTROL_SET_DMASTER = 11, /* obsolete */
286 CTDB_CONTROL_PULL_DB = 13,
287 CTDB_CONTROL_PUSH_DB = 14,
288 CTDB_CONTROL_GET_RECMODE = 15,
289 CTDB_CONTROL_SET_RECMODE = 16,
290 CTDB_CONTROL_STATISTICS_RESET = 17,
291 CTDB_CONTROL_DB_ATTACH = 18,
292 CTDB_CONTROL_SET_CALL = 19,
293 CTDB_CONTROL_TRAVERSE_START = 20,
294 CTDB_CONTROL_TRAVERSE_ALL = 21,
295 CTDB_CONTROL_TRAVERSE_DATA = 22,
296 CTDB_CONTROL_REGISTER_SRVID = 23,
297 CTDB_CONTROL_DEREGISTER_SRVID = 24,
298 CTDB_CONTROL_GET_DBNAME = 25,
299 CTDB_CONTROL_ENABLE_SEQNUM = 26,
300 CTDB_CONTROL_UPDATE_SEQNUM = 27,
302 CTDB_CONTROL_DUMP_MEMORY = 29,
303 CTDB_CONTROL_GET_PID = 30,
304 CTDB_CONTROL_GET_RECMASTER = 31,
305 CTDB_CONTROL_SET_RECMASTER = 32,
306 CTDB_CONTROL_FREEZE = 33,
307 CTDB_CONTROL_THAW = 34,
308 CTDB_CONTROL_GET_PNN = 35,
309 CTDB_CONTROL_SHUTDOWN = 36,
310 CTDB_CONTROL_GET_MONMODE = 37,
315 CTDB_CONTROL_TAKEOVER_IPv4 = 42, /* obsolete */
316 CTDB_CONTROL_RELEASE_IPv4 = 43, /* obsolete */
317 CTDB_CONTROL_TCP_CLIENT = 44,
318 CTDB_CONTROL_TCP_ADD = 45,
319 CTDB_CONTROL_TCP_REMOVE = 46,
320 CTDB_CONTROL_STARTUP = 47,
321 CTDB_CONTROL_SET_TUNABLE = 48,
322 CTDB_CONTROL_GET_TUNABLE = 49,
323 CTDB_CONTROL_LIST_TUNABLES = 50,
324 CTDB_CONTROL_GET_PUBLIC_IPSv4 = 51, /* obsolete */
325 CTDB_CONTROL_MODIFY_FLAGS = 52,
326 CTDB_CONTROL_GET_ALL_TUNABLES = 53,
327 CTDB_CONTROL_KILL_TCP = 54,
328 CTDB_CONTROL_GET_TCP_TICKLE_LIST = 55,
329 CTDB_CONTROL_SET_TCP_TICKLE_LIST = 56,
330 CTDB_CONTROL_REGISTER_SERVER_ID = 57,
331 CTDB_CONTROL_UNREGISTER_SERVER_ID = 58,
332 CTDB_CONTROL_CHECK_SERVER_ID = 59,
333 CTDB_CONTROL_GET_SERVER_ID_LIST = 60,
334 CTDB_CONTROL_DB_ATTACH_PERSISTENT = 61,
335 CTDB_CONTROL_PERSISTENT_STORE = 62,
336 CTDB_CONTROL_UPDATE_RECORD = 63,
337 CTDB_CONTROL_SEND_GRATIOUS_ARP = 64,
338 CTDB_CONTROL_TRANSACTION_START = 65,
339 CTDB_CONTROL_TRANSACTION_COMMIT = 66,
340 CTDB_CONTROL_WIPE_DATABASE = 67,
342 CTDB_CONTROL_UPTIME = 69,
343 CTDB_CONTROL_START_RECOVERY = 70,
344 CTDB_CONTROL_END_RECOVERY = 71,
345 CTDB_CONTROL_RELOAD_NODES_FILE = 72,
347 CTDB_CONTROL_TRY_DELETE_RECORDS = 74,
348 CTDB_CONTROL_ENABLE_MONITOR = 75,
349 CTDB_CONTROL_DISABLE_MONITOR = 76,
350 CTDB_CONTROL_ADD_PUBLIC_IP = 77,
351 CTDB_CONTROL_DEL_PUBLIC_IP = 78,
352 CTDB_CONTROL_RUN_EVENTSCRIPTS = 79,
353 CTDB_CONTROL_GET_CAPABILITIES = 80,
354 CTDB_CONTROL_START_PERSISTENT_UPDATE = 81,
355 CTDB_CONTROL_CANCEL_PERSISTENT_UPDATE= 82,
356 CTDB_CONTROL_TRANS2_COMMIT = 83,
357 CTDB_CONTROL_TRANS2_FINISHED = 84,
358 CTDB_CONTROL_TRANS2_ERROR = 85,
359 CTDB_CONTROL_TRANS2_COMMIT_RETRY = 86,
360 CTDB_CONTROL_RECD_PING = 87,
361 CTDB_CONTROL_RELEASE_IP = 88,
362 CTDB_CONTROL_TAKEOVER_IP = 89,
363 CTDB_CONTROL_GET_PUBLIC_IPS = 90,
364 CTDB_CONTROL_GET_NODEMAP = 91,
365 CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS = 96,
366 CTDB_CONTROL_TRAVERSE_KILL = 97,
367 CTDB_CONTROL_RECD_RECLOCK_LATENCY = 98,
368 CTDB_CONTROL_GET_RECLOCK_FILE = 99,
369 CTDB_CONTROL_SET_RECLOCK_FILE = 100,
370 CTDB_CONTROL_STOP_NODE = 101,
371 CTDB_CONTROL_CONTINUE_NODE = 102,
372 CTDB_CONTROL_SET_NATGWSTATE = 103,
373 CTDB_CONTROL_SET_LMASTERROLE = 104,
374 CTDB_CONTROL_SET_RECMASTERROLE = 105,
375 CTDB_CONTROL_ENABLE_SCRIPT = 107,
376 CTDB_CONTROL_DISABLE_SCRIPT = 108,
377 CTDB_CONTROL_SET_BAN_STATE = 109,
378 CTDB_CONTROL_GET_BAN_STATE = 110,
379 CTDB_CONTROL_SET_DB_PRIORITY = 111,
380 CTDB_CONTROL_GET_DB_PRIORITY = 112,
381 CTDB_CONTROL_TRANSACTION_CANCEL = 113,
382 CTDB_CONTROL_REGISTER_NOTIFY = 114,
383 CTDB_CONTROL_DEREGISTER_NOTIFY = 115,
384 CTDB_CONTROL_TRANS2_ACTIVE = 116,
385 CTDB_CONTROL_GET_LOG = 117,
386 CTDB_CONTROL_CLEAR_LOG = 118,
387 CTDB_CONTROL_TRANS3_COMMIT = 119,
388 CTDB_CONTROL_GET_DB_SEQNUM = 120,
389 CTDB_CONTROL_DB_SET_HEALTHY = 121,
390 CTDB_CONTROL_DB_GET_HEALTH = 122,
391 CTDB_CONTROL_GET_PUBLIC_IP_INFO = 123,
392 CTDB_CONTROL_GET_IFACES = 124,
393 CTDB_CONTROL_SET_IFACE_LINK_STATE = 125,
394 CTDB_CONTROL_TCP_ADD_DELAYED_UPDATE = 126,
395 CTDB_CONTROL_GET_STAT_HISTORY = 127,
396 CTDB_CONTROL_SCHEDULE_FOR_DELETION = 128,
397 CTDB_CONTROL_SET_DB_READONLY = 129,
398 CTDB_CONTROL_CHECK_SRVIDS = 130,
399 CTDB_CONTROL_TRAVERSE_START_EXT = 131,
400 CTDB_CONTROL_GET_DB_STATISTICS = 132,
401 CTDB_CONTROL_SET_DB_STICKY = 133,
402 CTDB_CONTROL_RELOAD_PUBLIC_IPS = 134,
403 CTDB_CONTROL_TRAVERSE_ALL_EXT = 135,
404 CTDB_CONTROL_RECEIVE_RECORDS = 136,
405 CTDB_CONTROL_IPREALLOCATED = 137,
406 CTDB_CONTROL_GET_RUNSTATE = 138,
412 struct ctdb_req_header {
415 uint32_t ctdb_version;
423 struct ctdb_req_call {
424 struct ctdb_req_header hdr;
430 uint32_t calldatalen;
431 uint8_t data[1]; /* key[] followed by calldata[] */
434 struct ctdb_reply_call {
435 struct ctdb_req_header hdr;
441 struct ctdb_reply_error {
442 struct ctdb_req_header hdr;
448 struct ctdb_req_dmaster {
449 struct ctdb_req_header hdr;
458 struct ctdb_reply_dmaster {
459 struct ctdb_req_header hdr;
467 struct ctdb_req_message {
468 struct ctdb_req_header hdr;
474 struct ctdb_req_getdbpath {
475 struct ctdb_req_header hdr;
479 struct ctdb_reply_getdbpath {
480 struct ctdb_req_header hdr;
485 struct ctdb_req_control {
486 struct ctdb_req_header hdr;
491 #define CTDB_CTRL_FLAG_NOREPLY 1
492 #define CTDB_CTRL_FLAG_OPCODE_SPECIFIC 0xFFFF0000
498 struct ctdb_reply_control {
499 struct ctdb_req_header hdr;
506 struct ctdb_req_keepalive {
507 struct ctdb_req_header hdr;
511 /* types of failures possible from TRANS2_COMMIT */
512 enum ctdb_trans2_commit_error {
513 CTDB_TRANS2_COMMIT_SUCCESS=0, /* all nodes committed successfully */
514 CTDB_TRANS2_COMMIT_TIMEOUT=1, /* at least one node timed out */
515 CTDB_TRANS2_COMMIT_ALLFAIL=2, /* all nodes failed the commit */
516 CTDB_TRANS2_COMMIT_SOMEFAIL=3 /* some nodes failed the commit, some allowed it */
520 the extended header for records in the ltdb
522 struct ctdb_ltdb_header {
526 #define CTDB_REC_FLAG_DEFAULT 0x00000000
527 #define CTDB_REC_FLAG_MIGRATED_WITH_DATA 0x00010000
528 #define CTDB_REC_FLAG_VACUUM_MIGRATED 0x00020000
529 #define CTDB_REC_FLAG_AUTOMATIC 0x00040000
530 #define CTDB_REC_RO_HAVE_DELEGATIONS 0x01000000
531 #define CTDB_REC_RO_HAVE_READONLY 0x02000000
532 #define CTDB_REC_RO_REVOKING_READONLY 0x04000000
533 #define CTDB_REC_RO_REVOKE_COMPLETE 0x08000000
534 #define CTDB_REC_RO_FLAGS (CTDB_REC_RO_HAVE_DELEGATIONS|\
535 CTDB_REC_RO_HAVE_READONLY|\
536 CTDB_REC_RO_REVOKING_READONLY|\
537 CTDB_REC_RO_REVOKE_COMPLETE)
543 definitions for different socket structures
545 typedef struct sockaddr_in ctdb_addr_in;
546 typedef struct sockaddr_in6 ctdb_addr_in6;
554 A structure describing a single node, its flags and its address
556 struct ctdb_node_and_flags {
564 Structure used for a nodemap.
565 The nodemap is the structure containing a list of all nodes
566 known to the cluster and their associated flags.
568 struct ctdb_node_map {
570 struct ctdb_node_and_flags nodes[1];
576 #define NODE_FLAGS_DISCONNECTED 0x00000001 /* node isn't connected */
577 #define NODE_FLAGS_UNHEALTHY 0x00000002 /* monitoring says node is unhealthy */
578 #define NODE_FLAGS_PERMANENTLY_DISABLED 0x00000004 /* administrator has disabled node */
579 #define NODE_FLAGS_BANNED 0x00000008 /* recovery daemon has banned the node */
580 #define NODE_FLAGS_DELETED 0x00000010 /* this node has been deleted */
581 #define NODE_FLAGS_STOPPED 0x00000020 /* this node has been stopped */
582 #define NODE_FLAGS_DISABLED (NODE_FLAGS_UNHEALTHY|NODE_FLAGS_PERMANENTLY_DISABLED)
583 #define NODE_FLAGS_INACTIVE (NODE_FLAGS_DELETED|NODE_FLAGS_DISCONNECTED|NODE_FLAGS_BANNED|NODE_FLAGS_STOPPED)
588 #define CTDB_CAP_RECMASTER 0x00000001
589 #define CTDB_CAP_LMASTER 0x00000002
590 /* This capability is set if CTDB_LVS_PUBLIC_IP is set */
591 #define CTDB_CAP_LVS 0x00000004
592 /* This capability is set if NATGW is enabled */
593 #define CTDB_CAP_NATGW 0x00000008
596 struct ctdb_public_ip {
601 struct ctdb_all_public_ips {
603 struct ctdb_public_ip ips[1];
607 struct latency_counter {
615 structure used to pass record data between the child and parent
617 struct ctdb_rec_data {
625 struct ctdb_traverse_start {
631 struct ctdb_traverse_start_ext {
635 bool withemptyrecords;
639 ctdb statistics information
641 #define MAX_COUNT_BUCKETS 16
642 #define MAX_HOT_KEYS 10
644 struct ctdb_statistics {
645 uint32_t num_clients;
648 uint32_t client_packets_sent;
649 uint32_t client_packets_recv;
650 uint32_t node_packets_sent;
651 uint32_t node_packets_recv;
652 uint32_t keepalive_packets_sent;
653 uint32_t keepalive_packets_recv;
657 uint32_t req_dmaster;
658 uint32_t reply_dmaster;
659 uint32_t reply_error;
660 uint32_t req_message;
661 uint32_t req_control;
662 uint32_t reply_control;
666 uint32_t req_message;
667 uint32_t req_control;
675 struct latency_counter ctdbd;
676 struct latency_counter recd;
680 uint32_t num_current;
681 uint32_t num_pending;
683 struct latency_counter latency;
684 uint32_t buckets[MAX_COUNT_BUCKETS];
686 uint32_t total_calls;
687 uint32_t pending_calls;
688 uint32_t childwrite_calls;
689 uint32_t pending_childwrite_calls;
690 uint32_t memory_used;
691 uint32_t __last_counter; /* hack for control_statistics_all */
692 uint32_t max_hop_count;
693 uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
694 struct latency_counter call_latency;
695 struct latency_counter childwrite_latency;
696 uint32_t num_recoveries;
697 struct timeval statistics_start_time;
698 struct timeval statistics_current_time;
699 uint32_t total_ro_delegations;
700 uint32_t total_ro_revokes;
704 * wire format for statistics history
706 struct ctdb_statistics_wire {
708 struct ctdb_statistics stats[1];
714 struct ctdb_db_statistics {
717 uint32_t num_current;
718 uint32_t num_pending;
720 struct latency_counter latency;
721 uint32_t buckets[MAX_COUNT_BUCKETS];
723 uint32_t db_ro_delegations;
724 uint32_t db_ro_revokes;
725 uint32_t hop_count_bucket[MAX_COUNT_BUCKETS];
726 uint32_t num_hot_keys;
730 } hot_keys[MAX_HOT_KEYS];
731 char hot_keys_wire[1];
735 * wire format for interface list
738 #define CTDB_IFACE_SIZE IFNAMSIZ
740 #define CTDB_IFACE_SIZE 16
743 struct ctdb_iface_info {
744 char name[CTDB_IFACE_SIZE+2];
749 struct ctdb_ifaces_list {
751 struct ctdb_iface_info ifaces[1];
754 #define INVALID_GENERATION 1
755 /* table that contains the mapping between a hash value and lmaster
757 struct ctdb_vnn_map {
764 a wire representation of the vnn map
766 struct ctdb_vnn_map_wire {