forked from openvswitch/ovs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathovsdb-server.c
2134 lines (1862 loc) · 68.1 KB
/
ovsdb-server.c
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
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <errno.h>
#include <getopt.h>
#include <inttypes.h>
#include <signal.h>
#include <sys/stat.h>
#include <unistd.h>
#include "column.h"
#include "command-line.h"
#include "daemon.h"
#include "dirs.h"
#include "dns-resolve.h"
#include "openvswitch/dynamic-string.h"
#include "fatal-signal.h"
#include "file.h"
#include "hash.h"
#include "openvswitch/json.h"
#include "jsonrpc.h"
#include "jsonrpc-server.h"
#include "openvswitch/list.h"
#include "memory.h"
#include "monitor.h"
#include "ovs-replay.h"
#include "ovsdb.h"
#include "ovsdb-data.h"
#include "ovsdb-types.h"
#include "ovsdb-error.h"
#include "openvswitch/poll-loop.h"
#include "process.h"
#include "replication.h"
#include "relay.h"
#include "row.h"
#include "simap.h"
#include "openvswitch/shash.h"
#include "stream-ssl.h"
#include "stream.h"
#include "sset.h"
#include "storage.h"
#include "table.h"
#include "timeval.h"
#include "transaction.h"
#include "trigger.h"
#include "util.h"
#include "unixctl.h"
#include "perf-counter.h"
#include "ovsdb-util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ovsdb_server);
struct db {
char *filename;
struct ovsdb *db;
struct uuid row_uuid;
};
/* SSL configuration. */
static char *private_key_file;
static char *certificate_file;
static char *ca_cert_file;
static char *ssl_protocols;
static char *ssl_ciphers;
static bool bootstrap_ca_cert;
/* Try to reclaim heap memory back to system after DB compaction. */
static bool trim_memory = false;
static unixctl_cb_func ovsdb_server_exit;
static unixctl_cb_func ovsdb_server_compact;
static unixctl_cb_func ovsdb_server_memory_trim_on_compaction;
static unixctl_cb_func ovsdb_server_reconnect;
static unixctl_cb_func ovsdb_server_perf_counters_clear;
static unixctl_cb_func ovsdb_server_perf_counters_show;
static unixctl_cb_func ovsdb_server_disable_monitor_cond;
static unixctl_cb_func ovsdb_server_set_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_get_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_connect_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_disconnect_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_set_active_ovsdb_server_probe_interval;
static unixctl_cb_func ovsdb_server_set_sync_exclude_tables;
static unixctl_cb_func ovsdb_server_get_sync_exclude_tables;
static unixctl_cb_func ovsdb_server_get_sync_status;
static unixctl_cb_func ovsdb_server_get_db_storage_status;
struct server_config {
struct sset *remotes;
struct shash *all_dbs;
FILE *config_tmpfile;
char **sync_from;
char **sync_exclude;
bool *is_backup;
int *replication_probe_interval;
struct ovsdb_jsonrpc_server *jsonrpc;
};
static unixctl_cb_func ovsdb_server_add_remote;
static unixctl_cb_func ovsdb_server_remove_remote;
static unixctl_cb_func ovsdb_server_list_remotes;
static unixctl_cb_func ovsdb_server_add_database;
static unixctl_cb_func ovsdb_server_remove_database;
static unixctl_cb_func ovsdb_server_list_databases;
static void read_db(struct server_config *, struct db *);
static struct ovsdb_error *open_db(struct server_config *,
const char *filename)
OVS_WARN_UNUSED_RESULT;
static void add_server_db(struct server_config *);
static void remove_db(struct server_config *, struct shash_node *db, char *);
static void close_db(struct server_config *, struct db *, char *);
static void parse_options(int argc, char *argvp[],
struct sset *db_filenames, struct sset *remotes,
char **unixctl_pathp, char **run_command,
char **sync_from, char **sync_exclude,
bool *is_backup);
OVS_NO_RETURN static void usage(void);
static char *reconfigure_remotes(struct ovsdb_jsonrpc_server *,
const struct shash *all_dbs,
struct sset *remotes);
static char *reconfigure_ssl(const struct shash *all_dbs);
static void report_error_if_changed(char *error, char **last_errorp);
static void update_remote_status(const struct ovsdb_jsonrpc_server *jsonrpc,
const struct sset *remotes,
struct shash *all_dbs);
static void update_server_status(struct shash *all_dbs);
static void save_config__(FILE *config_file, const struct sset *remotes,
const struct sset *db_filenames,
const char *sync_from, const char *sync_exclude,
bool is_backup);
static void save_config(struct server_config *);
static void load_config(FILE *config_file, struct sset *remotes,
struct sset *db_filenames, char **sync_from,
char **sync_exclude, bool *is_backup);
static void
ovsdb_replication_init(const char *sync_from, const char *exclude,
struct shash *all_dbs, const struct uuid *server_uuid,
int probe_interval)
{
replication_init(sync_from, exclude, server_uuid, probe_interval);
struct shash_node *node;
SHASH_FOR_EACH (node, all_dbs) {
struct db *db = node->data;
if (node->name[0] != '_' && db->db) {
replication_add_local_db(node->name, db->db);
}
}
}
static void
log_and_free_error(struct ovsdb_error *error)
{
if (error) {
char *s = ovsdb_error_to_string_free(error);
VLOG_INFO("%s", s);
free(s);
}
}
static void
main_loop(struct server_config *config,
struct ovsdb_jsonrpc_server *jsonrpc, struct shash *all_dbs,
struct unixctl_server *unixctl, struct sset *remotes,
struct process *run_process, bool *exiting, bool *is_backup)
{
char *remotes_error, *ssl_error;
struct shash_node *node;
long long int status_timer = LLONG_MIN;
*exiting = false;
ssl_error = NULL;
remotes_error = NULL;
while (!*exiting) {
memory_run();
if (memory_should_report()) {
struct simap usage;
simap_init(&usage);
ovsdb_jsonrpc_server_get_memory_usage(jsonrpc, &usage);
ovsdb_monitor_get_memory_usage(&usage);
SHASH_FOR_EACH(node, all_dbs) {
struct db *db = node->data;
ovsdb_get_memory_usage(db->db, &usage);
}
memory_report(&usage);
simap_destroy(&usage);
}
/* Run unixctl_server_run() before reconfigure_remotes() because
* ovsdb-server/add-remote and ovsdb-server/remove-remote can change
* the set of remotes that reconfigure_remotes() uses. */
unixctl_server_run(unixctl);
ovsdb_jsonrpc_server_set_read_only(jsonrpc, *is_backup);
report_error_if_changed(
reconfigure_remotes(jsonrpc, all_dbs, remotes),
&remotes_error);
report_error_if_changed(reconfigure_ssl(all_dbs), &ssl_error);
ovsdb_jsonrpc_server_run(jsonrpc);
if (*is_backup) {
replication_run();
if (!replication_is_alive()) {
disconnect_active_server();
*is_backup = false;
}
}
ovsdb_relay_run();
SHASH_FOR_EACH_SAFE (node, all_dbs) {
struct db *db = node->data;
ovsdb_txn_history_run(db->db);
ovsdb_storage_run(db->db->storage);
read_db(config, db);
/* Run triggers after storage_run and read_db to make sure new raft
* updates are utilized in current iteration. */
if (ovsdb_trigger_run(db->db, time_msec())) {
/* The message below is currently the only reason to disconnect
* all clients. */
ovsdb_jsonrpc_server_reconnect(
jsonrpc, false,
xasprintf("committed %s database schema conversion",
db->db->name));
}
if (ovsdb_storage_is_dead(db->db->storage)) {
VLOG_INFO("%s: removing database because storage disconnected "
"permanently", node->name);
remove_db(config, node,
xasprintf("removing database %s because storage "
"disconnected permanently", node->name));
} else if (ovsdb_storage_should_snapshot(db->db->storage)) {
log_and_free_error(ovsdb_snapshot(db->db, trim_memory));
}
}
if (run_process) {
process_run();
if (process_exited(run_process)) {
*exiting = true;
}
}
/* update Manager status(es) every 2.5 seconds. Don't update if we're
* recording or performing replay. */
if (status_timer == LLONG_MIN ||
(!ovs_replay_is_active() && time_msec() >= status_timer)) {
status_timer = time_msec() + 2500;
update_remote_status(jsonrpc, remotes, all_dbs);
}
update_server_status(all_dbs);
memory_wait();
if (*is_backup) {
replication_wait();
}
ovsdb_relay_wait();
ovsdb_jsonrpc_server_wait(jsonrpc);
unixctl_server_wait(unixctl);
SHASH_FOR_EACH(node, all_dbs) {
struct db *db = node->data;
ovsdb_trigger_wait(db->db, time_msec());
ovsdb_storage_wait(db->db->storage);
ovsdb_storage_read_wait(db->db->storage);
}
if (run_process) {
process_wait(run_process);
}
if (*exiting) {
poll_immediate_wake();
}
if (!ovs_replay_is_active()) {
poll_timer_wait_until(status_timer);
}
poll_block();
if (should_service_stop()) {
*exiting = true;
}
}
free(remotes_error);
}
int
main(int argc, char *argv[])
{
char *unixctl_path = NULL;
char *run_command = NULL;
struct unixctl_server *unixctl;
struct ovsdb_jsonrpc_server *jsonrpc;
struct sset remotes, db_filenames;
char *sync_from, *sync_exclude;
bool is_backup;
const char *db_filename;
struct process *run_process;
bool exiting;
int retval;
FILE *config_tmpfile;
struct server_config server_config;
struct shash all_dbs;
struct shash_node *node;
int replication_probe_interval = REPLICATION_DEFAULT_PROBE_INTERVAL;
ovs_cmdl_proctitle_init(argc, argv);
set_program_name(argv[0]);
service_start(&argc, &argv);
fatal_ignore_sigpipe();
process_init();
dns_resolve_init(true);
bool active = false;
parse_options(argc, argv, &db_filenames, &remotes, &unixctl_path,
&run_command, &sync_from, &sync_exclude, &active);
is_backup = sync_from && !active;
daemon_become_new_user(false);
/* Create and initialize 'config_tmpfile' as a temporary file to hold
* ovsdb-server's most basic configuration, and then save our initial
* configuration to it. When --monitor is used, this preserves the effects
* of ovs-appctl commands such as ovsdb-server/add-remote (which saves the
* new configuration) across crashes. */
config_tmpfile = tmpfile();
if (!config_tmpfile) {
ovs_fatal(errno, "failed to create temporary file");
}
server_config.remotes = &remotes;
server_config.config_tmpfile = config_tmpfile;
save_config__(config_tmpfile, &remotes, &db_filenames, sync_from,
sync_exclude, is_backup);
daemonize_start(false);
/* Load the saved config. */
load_config(config_tmpfile, &remotes, &db_filenames, &sync_from,
&sync_exclude, &is_backup);
/* Start ovsdb jsonrpc server. When running as a backup server,
* jsonrpc connections are read only. Otherwise, both read
* and write transactions are allowed. */
jsonrpc = ovsdb_jsonrpc_server_create(is_backup);
shash_init(&all_dbs);
server_config.all_dbs = &all_dbs;
server_config.jsonrpc = jsonrpc;
server_config.sync_from = &sync_from;
server_config.sync_exclude = &sync_exclude;
server_config.is_backup = &is_backup;
server_config.replication_probe_interval = &replication_probe_interval;
perf_counters_init();
SSET_FOR_EACH (db_filename, &db_filenames) {
struct ovsdb_error *error = open_db(&server_config, db_filename);
if (error) {
char *s = ovsdb_error_to_string_free(error);
ovs_fatal(0, "%s", s);
}
}
add_server_db(&server_config);
char *error = reconfigure_remotes(jsonrpc, &all_dbs, &remotes);
if (!error) {
error = reconfigure_ssl(&all_dbs);
}
if (error) {
ovs_fatal(0, "%s", error);
}
retval = unixctl_server_create(unixctl_path, &unixctl);
if (retval) {
exit(EXIT_FAILURE);
}
if (run_command) {
char *run_argv[4];
run_argv[0] = "/bin/sh";
run_argv[1] = "-c";
run_argv[2] = run_command;
run_argv[3] = NULL;
retval = process_start(run_argv, &run_process);
if (retval) {
ovs_fatal(retval, "%s: process failed to start", run_command);
}
} else {
run_process = NULL;
}
daemonize_complete();
if (!run_command) {
/* ovsdb-server is usually a long-running process, in which case it
* makes plenty of sense to log the version, but --run makes
* ovsdb-server more like a command-line tool, so skip it. */
VLOG_INFO("%s (Open vSwitch) %s", program_name, VERSION);
}
unixctl_command_register("exit", "", 0, 0, ovsdb_server_exit, &exiting);
unixctl_command_register("ovsdb-server/compact", "", 0, 1,
ovsdb_server_compact, &all_dbs);
unixctl_command_register("ovsdb-server/memory-trim-on-compaction",
"on|off", 1, 1,
ovsdb_server_memory_trim_on_compaction, NULL);
unixctl_command_register("ovsdb-server/reconnect", "", 0, 0,
ovsdb_server_reconnect, jsonrpc);
unixctl_command_register("ovsdb-server/add-remote", "REMOTE", 1, 1,
ovsdb_server_add_remote, &server_config);
unixctl_command_register("ovsdb-server/remove-remote", "REMOTE", 1, 1,
ovsdb_server_remove_remote, &server_config);
unixctl_command_register("ovsdb-server/list-remotes", "", 0, 0,
ovsdb_server_list_remotes, &remotes);
unixctl_command_register("ovsdb-server/add-db", "DB", 1, 1,
ovsdb_server_add_database, &server_config);
unixctl_command_register("ovsdb-server/remove-db", "DB", 1, 1,
ovsdb_server_remove_database, &server_config);
unixctl_command_register("ovsdb-server/list-dbs", "", 0, 0,
ovsdb_server_list_databases, &all_dbs);
unixctl_command_register("ovsdb-server/perf-counters-show", "", 0, 0,
ovsdb_server_perf_counters_show, NULL);
unixctl_command_register("ovsdb-server/perf-counters-clear", "", 0, 0,
ovsdb_server_perf_counters_clear, NULL);
unixctl_command_register("ovsdb-server/set-active-ovsdb-server", "", 1, 1,
ovsdb_server_set_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/get-active-ovsdb-server", "", 0, 0,
ovsdb_server_get_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/connect-active-ovsdb-server", "",
0, 0, ovsdb_server_connect_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/disconnect-active-ovsdb-server", "",
0, 0, ovsdb_server_disconnect_active_ovsdb_server,
&server_config);
unixctl_command_register(
"ovsdb-server/set-active-ovsdb-server-probe-interval", "", 1, 1,
ovsdb_server_set_active_ovsdb_server_probe_interval, &server_config);
unixctl_command_register("ovsdb-server/set-sync-exclude-tables", "",
0, 1, ovsdb_server_set_sync_exclude_tables,
&server_config);
unixctl_command_register("ovsdb-server/get-sync-exclude-tables", "",
0, 0, ovsdb_server_get_sync_exclude_tables,
NULL);
unixctl_command_register("ovsdb-server/sync-status", "",
0, 0, ovsdb_server_get_sync_status,
&server_config);
unixctl_command_register("ovsdb-server/get-db-storage-status", "DB", 1, 1,
ovsdb_server_get_db_storage_status,
&server_config);
/* Simulate the behavior of OVS release prior to version 2.5 that
* does not support the monitor_cond method. */
unixctl_command_register("ovsdb-server/disable-monitor-cond", "", 0, 0,
ovsdb_server_disable_monitor_cond, jsonrpc);
if (is_backup) {
const struct uuid *server_uuid;
server_uuid = ovsdb_jsonrpc_server_get_uuid(jsonrpc);
ovsdb_replication_init(sync_from, sync_exclude, &all_dbs, server_uuid,
replication_probe_interval);
}
main_loop(&server_config, jsonrpc, &all_dbs, unixctl, &remotes,
run_process, &exiting, &is_backup);
SHASH_FOR_EACH_SAFE (node, &all_dbs) {
struct db *db = node->data;
close_db(&server_config, db, NULL);
shash_delete(&all_dbs, node);
}
ovsdb_jsonrpc_server_destroy(jsonrpc);
shash_destroy(&all_dbs);
sset_destroy(&remotes);
sset_destroy(&db_filenames);
free(sync_from);
free(sync_exclude);
unixctl_server_destroy(unixctl);
replication_destroy();
if (run_process && process_exited(run_process)) {
int status = process_status(run_process);
if (status) {
ovs_fatal(0, "%s: child exited, %s",
run_command, process_status_msg(status));
}
}
dns_resolve_destroy();
perf_counters_destroy();
service_stop();
return 0;
}
/* Returns true if 'filename' is known to be already open as a database,
* false if not.
*
* "False negatives" are possible. */
static bool
is_already_open(struct server_config *config OVS_UNUSED,
const char *filename OVS_UNUSED)
{
#ifndef _WIN32
struct stat s;
if (!stat(filename, &s)) {
struct shash_node *node;
SHASH_FOR_EACH (node, config->all_dbs) {
struct db *db = node->data;
struct stat s2;
if (!stat(db->filename, &s2)
&& s.st_dev == s2.st_dev
&& s.st_ino == s2.st_ino) {
return true;
}
}
}
#endif /* !_WIN32 */
return false;
}
static void
close_db(struct server_config *config, struct db *db, char *comment)
{
if (db) {
ovsdb_jsonrpc_server_remove_db(config->jsonrpc, db->db, comment);
if (db->db->is_relay) {
ovsdb_relay_del_db(db->db);
}
ovsdb_destroy(db->db);
free(db->filename);
free(db);
} else {
free(comment);
}
}
static void
update_schema(struct ovsdb *db, const struct ovsdb_schema *schema, void *aux)
{
struct server_config *config = aux;
if (!db->schema || strcmp(schema->version, db->schema->version)) {
ovsdb_jsonrpc_server_reconnect(
config->jsonrpc, false,
(db->schema
? xasprintf("database %s schema changed", db->name)
: xasprintf("database %s connected to storage", db->name)));
}
ovsdb_replace(db, ovsdb_create(ovsdb_schema_clone(schema), NULL));
/* Force update to schema in _Server database. */
struct db *dbp = shash_find_data(config->all_dbs, db->name);
if (dbp) {
dbp->row_uuid = UUID_ZERO;
}
}
static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
parse_txn(struct server_config *config, struct db *db,
const struct ovsdb_schema *schema, const struct json *txn_json,
const struct uuid *txnid)
{
if (schema) {
/* We're replacing the schema (and the data). Destroy the database
* (first grabbing its storage), then replace it with the new schema.
* The transaction must also include the replacement data.
*
* Only clustered database schema changes and snapshot installs
* go through this path.
*/
ovs_assert(txn_json);
ovs_assert(ovsdb_storage_is_clustered(db->db->storage));
struct ovsdb_error *error = ovsdb_schema_check_for_ephemeral_columns(
schema);
if (error) {
return error;
}
update_schema(db->db, schema, config);
}
if (txn_json) {
if (!db->db->schema) {
return ovsdb_error(NULL, "%s: data without schema", db->filename);
}
struct ovsdb_txn *txn;
struct ovsdb_error *error;
error = ovsdb_file_txn_from_json(db->db, txn_json, false, &txn);
if (!error) {
ovsdb_txn_set_txnid(txnid, txn);
log_and_free_error(ovsdb_txn_replay_commit(txn));
}
if (!error && !uuid_is_zero(txnid)) {
db->db->prereq = *txnid;
}
if (error) {
ovsdb_storage_unread(db->db->storage);
return error;
}
}
return NULL;
}
static void
read_db(struct server_config *config, struct db *db)
{
struct ovsdb_error *error;
for (;;) {
struct ovsdb_schema *schema;
struct json *txn_json;
struct uuid txnid;
error = ovsdb_storage_read(db->db->storage, &schema, &txn_json,
&txnid);
if (error) {
break;
} else if (!schema && !txn_json) {
/* End of file. */
return;
} else {
error = parse_txn(config, db, schema, txn_json, &txnid);
json_destroy(txn_json);
ovsdb_schema_destroy(schema);
if (error) {
break;
}
}
}
/* Log error but otherwise ignore it. Probably the database just
* got truncated due to power failure etc. and we should use its
* current contents. */
char *msg = ovsdb_error_to_string_free(error);
VLOG_ERR("%s", msg);
free(msg);
}
static void
add_db(struct server_config *config, struct db *db)
{
db->row_uuid = UUID_ZERO;
shash_add_assert(config->all_dbs, db->db->name, db);
}
static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
open_db(struct server_config *config, const char *filename)
{
const char *relay_prefix = "relay:";
const char *relay_remotes = NULL;
const int relay_prefix_len = strlen(relay_prefix);
struct ovsdb_storage *storage;
struct ovsdb_error *error;
bool is_relay;
char *name;
is_relay = !strncmp(filename, relay_prefix, relay_prefix_len);
if (!is_relay) {
/* If we know that the file is already open, return a good error
* message. Otherwise, if the file is open, we'll fail later on with
* a harder to interpret file locking error. */
if (is_already_open(config, filename)) {
return ovsdb_error(NULL, "%s: already open", filename);
}
error = ovsdb_storage_open(filename, true, &storage);
if (error) {
return error;
}
name = xstrdup(filename);
} else {
/* Parsing the relay in format 'relay:DB_NAME:<list of remotes>'*/
relay_remotes = strchr(filename + relay_prefix_len, ':');
if (!relay_remotes || relay_remotes[0] == '\0') {
return ovsdb_error(NULL, "%s: invalid syntax", filename);
}
name = xmemdup0(filename, relay_remotes - filename);
storage = ovsdb_storage_create_unbacked(name + relay_prefix_len);
relay_remotes++; /* Skip the ':'. */
}
struct ovsdb_schema *schema;
if (is_relay || ovsdb_storage_is_clustered(storage)) {
schema = NULL;
} else {
struct json *txn_json;
error = ovsdb_storage_read(storage, &schema, &txn_json, NULL);
if (error) {
ovsdb_storage_close(storage);
free(name);
return error;
}
ovs_assert(schema && !txn_json);
}
struct db *db = xzalloc(sizeof *db);
db->filename = name;
db->db = ovsdb_create(schema, storage);
ovsdb_jsonrpc_server_add_db(config->jsonrpc, db->db);
/* Enable txn history for clustered and relay modes. It is not enabled for
* other modes for now, since txn id is available for clustered and relay
* modes only. */
ovsdb_txn_history_init(db->db,
is_relay || ovsdb_storage_is_clustered(storage));
read_db(config, db);
error = (db->db->name[0] == '_'
? ovsdb_error(NULL, "%s: names beginning with \"_\" are reserved",
db->db->name)
: shash_find(config->all_dbs, db->db->name)
? ovsdb_error(NULL, "%s: duplicate database name", db->db->name)
: NULL);
if (error) {
char *error_s = ovsdb_error_to_string(error);
close_db(config, db,
xasprintf("cannot complete opening %s database (%s)",
db->db->name, error_s));
free(error_s);
return error;
}
add_db(config, db);
if (is_relay) {
ovsdb_relay_add_db(db->db, relay_remotes, update_schema, config);
}
return NULL;
}
/* Add the internal _Server database to the server configuration. */
static void
add_server_db(struct server_config *config)
{
struct json *schema_json = json_from_string(
#include "ovsdb/_server.ovsschema.inc"
);
ovs_assert(schema_json->type == JSON_OBJECT);
struct ovsdb_schema *schema;
struct ovsdb_error *error OVS_UNUSED = ovsdb_schema_from_json(schema_json,
&schema);
ovs_assert(!error);
json_destroy(schema_json);
struct db *db = xzalloc(sizeof *db);
/* We don't need txn_history for server_db. */
db->filename = xstrdup("<internal>");
db->db = ovsdb_create(schema, ovsdb_storage_create_unbacked(NULL));
bool ok OVS_UNUSED = ovsdb_jsonrpc_server_add_db(config->jsonrpc, db->db);
ovs_assert(ok);
add_db(config, db);
}
static char * OVS_WARN_UNUSED_RESULT
parse_db_column__(const struct shash *all_dbs,
const char *name_, char *name,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
const char *db_name, *table_name, *column_name;
const char *tokens[3];
char *save_ptr = NULL;
*dbp = NULL;
*tablep = NULL;
*columnp = NULL;
strtok_r(name, ":", &save_ptr); /* "db:" */
tokens[0] = strtok_r(NULL, ",", &save_ptr);
tokens[1] = strtok_r(NULL, ",", &save_ptr);
tokens[2] = strtok_r(NULL, ",", &save_ptr);
if (!tokens[0] || !tokens[1] || !tokens[2]) {
return xasprintf("\"%s\": invalid syntax", name_);
}
db_name = tokens[0];
table_name = tokens[1];
column_name = tokens[2];
*dbp = shash_find_data(all_dbs, tokens[0]);
if (!*dbp) {
return xasprintf("\"%s\": no database named %s", name_, db_name);
}
*tablep = ovsdb_get_table((*dbp)->db, table_name);
if (!*tablep) {
return xasprintf("\"%s\": no table named %s", name_, table_name);
}
*columnp = ovsdb_table_schema_get_column((*tablep)->schema, column_name);
if (!*columnp) {
return xasprintf("\"%s\": table \"%s\" has no column \"%s\"",
name_, table_name, column_name);
}
return NULL;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. */
static char * OVS_WARN_UNUSED_RESULT
parse_db_column(const struct shash *all_dbs,
const char *name_,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
char *name = xstrdup(name_);
char *retval = parse_db_column__(all_dbs, name_, name,
dbp, tablep, columnp);
free(name);
return retval;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. */
static char * OVS_WARN_UNUSED_RESULT
parse_db_string_column(const struct shash *all_dbs,
const char *name,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
char *retval;
retval = parse_db_column(all_dbs, name, dbp, tablep, columnp);
if (retval) {
return retval;
}
if ((*columnp)->type.key.type != OVSDB_TYPE_STRING
|| (*columnp)->type.value.type != OVSDB_TYPE_VOID) {
return xasprintf("\"%s\": table \"%s\" column \"%s\" is "
"not string or set of strings",
name, (*tablep)->schema->name, (*columnp)->name);
}
return NULL;
}
static const char *
query_db_string(const struct shash *all_dbs, const char *name,
struct ds *errors)
{
if (!name || strncmp(name, "db:", 3)) {
return name;
} else {
const struct ovsdb_column *column;
const struct ovsdb_table *table;
const struct ovsdb_row *row;
const struct db *db;
char *retval;
retval = parse_db_string_column(all_dbs, name,
&db, &table, &column);
if (retval) {
if (db && !db->db->schema) {
/* 'db' is a clustered database but it hasn't connected to the
* cluster yet, so we can't get anything out of it, not even a
* schema. Not really an error. */
} else {
ds_put_format(errors, "%s\n", retval);
}
free(retval);
return NULL;
}
HMAP_FOR_EACH (row, hmap_node, &table->rows) {
const struct ovsdb_datum *datum;
size_t i;
datum = &row->fields[column->index];
for (i = 0; i < datum->n; i++) {
const char *key = json_string(datum->keys[i].s);
if (key[0]) {
return key;
}
}
}
return NULL;
}
}
static struct ovsdb_jsonrpc_options *
add_remote(struct shash *remotes, const char *target)
{
struct ovsdb_jsonrpc_options *options;
options = shash_find_data(remotes, target);
if (!options) {
options = ovsdb_jsonrpc_default_options(target);
shash_add(remotes, target, options);
}
return options;
}
static void
free_remotes(struct shash *remotes)
{
if (remotes) {
struct shash_node *node;
SHASH_FOR_EACH (node, remotes) {
struct ovsdb_jsonrpc_options *options = node->data;
free(options->role);
}
shash_destroy_free_data(remotes);
}
}
/* Adds a remote and options to 'remotes', based on the Manager table row in
* 'row'. */
static void
add_manager_options(struct shash *remotes, const struct ovsdb_row *row)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
struct ovsdb_jsonrpc_options *options;
long long int max_backoff, probe_interval;
bool read_only;
const char *target, *dscp_string, *role;
if (!ovsdb_util_read_string_column(row, "target", &target) || !target) {
VLOG_INFO_RL(&rl, "Table `%s' has missing or invalid `target' column",
row->table->schema->name);
return;
}
options = add_remote(remotes, target);
if (ovsdb_util_read_integer_column(row, "max_backoff", &max_backoff)) {
options->max_backoff = max_backoff;
}
if (ovsdb_util_read_integer_column(row, "inactivity_probe",
&probe_interval)) {
options->probe_interval = probe_interval;
}
if (ovsdb_util_read_bool_column(row, "read_only", &read_only)) {
options->read_only = read_only;
}
free(options->role);
options->role = NULL;
if (ovsdb_util_read_string_column(row, "role", &role) && role) {
options->role = xstrdup(role);
}
options->dscp = DSCP_DEFAULT;
dscp_string = ovsdb_util_read_map_string_column(row, "other_config",
"dscp");
if (dscp_string) {
int dscp = atoi(dscp_string);
if (dscp >= 0 && dscp <= 63) {
options->dscp = dscp;
}
}
}
static void
query_db_remotes(const char *name, const struct shash *all_dbs,
struct shash *remotes, struct ds *errors)
{
const struct ovsdb_column *column;
const struct ovsdb_table *table;