summaryrefslogtreecommitdiff
path: root/ctdb/include/ctdb_protocol.h
blob: 33187c78428655a6a48ec8d0fdc06b4023c99824 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
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