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1b1d2e6d | 1 | /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2017 Nicira, Inc. |
f85f8ebb BP |
2 | * |
3 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | * you may not use this file except in compliance with the License. | |
5 | * You may obtain a copy of the License at: | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
9 | * Unless required by applicable law or agreed to in writing, software | |
10 | * distributed under the License is distributed on an "AS IS" BASIS, | |
11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | * See the License for the specific language governing permissions and | |
13 | * limitations under the License. | |
14 | */ | |
15 | ||
16 | #include <config.h> | |
17 | ||
18 | #include "ovsdb.h" | |
19 | ||
0d0f05b9 | 20 | #include "column.h" |
120fb2ca | 21 | #include "file.h" |
009bf21f | 22 | #include "monitor.h" |
ee89ea7b | 23 | #include "openvswitch/json.h" |
f85f8ebb BP |
24 | #include "ovsdb-error.h" |
25 | #include "ovsdb-parser.h" | |
0d0f05b9 | 26 | #include "ovsdb-types.h" |
0d085684 | 27 | #include "simap.h" |
1b1d2e6d | 28 | #include "storage.h" |
f85f8ebb BP |
29 | #include "table.h" |
30 | #include "transaction.h" | |
53178986 | 31 | #include "trigger.h" |
f85f8ebb | 32 | |
1b1d2e6d BP |
33 | #include "openvswitch/vlog.h" |
34 | VLOG_DEFINE_THIS_MODULE(ovsdb); | |
35 | ||
f85f8ebb | 36 | struct ovsdb_schema * |
6aa09313 | 37 | ovsdb_schema_create(const char *name, const char *version, const char *cksum) |
f85f8ebb BP |
38 | { |
39 | struct ovsdb_schema *schema; | |
40 | ||
41 | schema = xzalloc(sizeof *schema); | |
42 | schema->name = xstrdup(name); | |
8159b984 | 43 | schema->version = xstrdup(version); |
6aa09313 | 44 | schema->cksum = xstrdup(cksum); |
f85f8ebb BP |
45 | shash_init(&schema->tables); |
46 | ||
47 | return schema; | |
48 | } | |
49 | ||
58985e09 BP |
50 | struct ovsdb_schema * |
51 | ovsdb_schema_clone(const struct ovsdb_schema *old) | |
52 | { | |
53 | struct ovsdb_schema *new; | |
54 | struct shash_node *node; | |
55 | ||
6aa09313 | 56 | new = ovsdb_schema_create(old->name, old->version, old->cksum); |
58985e09 BP |
57 | SHASH_FOR_EACH (node, &old->tables) { |
58 | const struct ovsdb_table_schema *ts = node->data; | |
59 | ||
60 | shash_add(&new->tables, node->name, ovsdb_table_schema_clone(ts)); | |
61 | } | |
62 | return new; | |
63 | } | |
64 | ||
f85f8ebb BP |
65 | void |
66 | ovsdb_schema_destroy(struct ovsdb_schema *schema) | |
67 | { | |
68 | struct shash_node *node; | |
69 | ||
271915d3 BP |
70 | if (!schema) { |
71 | return; | |
72 | } | |
73 | ||
f85f8ebb BP |
74 | SHASH_FOR_EACH (node, &schema->tables) { |
75 | ovsdb_table_schema_destroy(node->data); | |
76 | } | |
77 | shash_destroy(&schema->tables); | |
f85f8ebb | 78 | free(schema->name); |
8159b984 | 79 | free(schema->version); |
6aa09313 | 80 | free(schema->cksum); |
f85f8ebb BP |
81 | free(schema); |
82 | } | |
83 | ||
84 | struct ovsdb_error * | |
85 | ovsdb_schema_from_file(const char *file_name, struct ovsdb_schema **schemap) | |
86 | { | |
87 | struct ovsdb_schema *schema; | |
88 | struct ovsdb_error *error; | |
89 | struct json *json; | |
90 | ||
91 | *schemap = NULL; | |
92 | json = json_from_file(file_name); | |
93 | if (json->type == JSON_STRING) { | |
94 | error = ovsdb_error("failed to read schema", | |
95 | "\"%s\" could not be read as JSON (%s)", | |
96 | file_name, json_string(json)); | |
97 | json_destroy(json); | |
98 | return error; | |
99 | } | |
100 | ||
101 | error = ovsdb_schema_from_json(json, &schema); | |
e084f690 | 102 | json_destroy(json); |
f85f8ebb | 103 | if (error) { |
f85f8ebb BP |
104 | return ovsdb_wrap_error(error, |
105 | "failed to parse \"%s\" as ovsdb schema", | |
106 | file_name); | |
107 | } | |
108 | ||
109 | *schemap = schema; | |
110 | return NULL; | |
111 | } | |
112 | ||
cab50449 | 113 | static struct ovsdb_error * OVS_WARN_UNUSED_RESULT |
42a49b96 | 114 | ovsdb_schema_check_ref_table(struct ovsdb_column *column, |
0d0f05b9 BP |
115 | const struct shash *tables, |
116 | const struct ovsdb_base_type *base, | |
117 | const char *base_name) | |
118 | { | |
42a49b96 BP |
119 | struct ovsdb_table_schema *refTable; |
120 | ||
fa37affa | 121 | if (base->type != OVSDB_TYPE_UUID || !base->uuid.refTableName) { |
42a49b96 BP |
122 | return NULL; |
123 | } | |
124 | ||
fa37affa | 125 | refTable = shash_find_data(tables, base->uuid.refTableName); |
42a49b96 | 126 | if (!refTable) { |
0d0f05b9 BP |
127 | return ovsdb_syntax_error(NULL, NULL, |
128 | "column %s %s refers to undefined table %s", | |
129 | column->name, base_name, | |
fa37affa | 130 | base->uuid.refTableName); |
0d0f05b9 | 131 | } |
42a49b96 BP |
132 | |
133 | if (ovsdb_base_type_is_strong_ref(base) && !refTable->is_root) { | |
134 | /* We cannot allow a strong reference to a non-root table to be | |
135 | * ephemeral: if it is the only reference to a row, then replaying the | |
136 | * database log from disk will cause the referenced row to be deleted, | |
137 | * even though it did exist in memory. If there are references to that | |
138 | * row later in the log (to modify it, to delete it, or just to point | |
139 | * to it), then this will yield a transaction error. */ | |
140 | column->persistent = true; | |
141 | } | |
142 | ||
143 | return NULL; | |
0d0f05b9 BP |
144 | } |
145 | ||
1b1d2e6d BP |
146 | /* Attempts to parse 's' as a version string in the format "<x>.<y>.<z>". If |
147 | * successful, stores each part of the version into 'version->x', 'version->y', | |
148 | * and 'version->z', respectively, and returns true. On failure, returns | |
149 | * false. */ | |
150 | bool | |
151 | ovsdb_parse_version(const char *s, struct ovsdb_version *version) | |
8159b984 BP |
152 | { |
153 | int n = -1; | |
1b1d2e6d BP |
154 | return (ovs_scan(s, "%u.%u.%u%n", &version->x, &version->y, &version->z, |
155 | &n) | |
156 | && n != -1 && s[n] == '\0'); | |
157 | } | |
158 | ||
159 | /* Returns true if 's' is a version string in the format "<x>.<y>.<z>", | |
160 | * otherwie false. */ | |
161 | bool | |
162 | ovsdb_is_valid_version(const char *s) | |
163 | { | |
164 | struct ovsdb_version version; | |
165 | return ovsdb_parse_version(s, &version); | |
8159b984 BP |
166 | } |
167 | ||
c5f341ab BP |
168 | /* Returns the number of tables in 'schema''s root set. */ |
169 | static size_t | |
170 | root_set_size(const struct ovsdb_schema *schema) | |
171 | { | |
172 | struct shash_node *node; | |
85dcedff | 173 | size_t n_root = 0; |
c5f341ab BP |
174 | |
175 | SHASH_FOR_EACH (node, &schema->tables) { | |
176 | struct ovsdb_table_schema *table = node->data; | |
177 | ||
178 | n_root += table->is_root; | |
179 | } | |
180 | return n_root; | |
181 | } | |
182 | ||
f85f8ebb | 183 | struct ovsdb_error * |
53178986 | 184 | ovsdb_schema_from_json(const struct json *json, struct ovsdb_schema **schemap) |
f85f8ebb BP |
185 | { |
186 | struct ovsdb_schema *schema; | |
6aa09313 | 187 | const struct json *name, *tables, *version_json, *cksum; |
f85f8ebb BP |
188 | struct ovsdb_error *error; |
189 | struct shash_node *node; | |
190 | struct ovsdb_parser parser; | |
8159b984 | 191 | const char *version; |
f85f8ebb BP |
192 | |
193 | *schemap = NULL; | |
194 | ||
195 | ovsdb_parser_init(&parser, json, "database schema"); | |
196 | name = ovsdb_parser_member(&parser, "name", OP_ID); | |
8159b984 BP |
197 | version_json = ovsdb_parser_member(&parser, "version", |
198 | OP_STRING | OP_OPTIONAL); | |
6aa09313 | 199 | cksum = ovsdb_parser_member(&parser, "cksum", OP_STRING | OP_OPTIONAL); |
f85f8ebb BP |
200 | tables = ovsdb_parser_member(&parser, "tables", OP_OBJECT); |
201 | error = ovsdb_parser_finish(&parser); | |
202 | if (error) { | |
203 | return error; | |
204 | } | |
205 | ||
8159b984 BP |
206 | if (version_json) { |
207 | version = json_string(version_json); | |
1b1d2e6d | 208 | if (!ovsdb_is_valid_version(version)) { |
8159b984 BP |
209 | return ovsdb_syntax_error(json, NULL, "schema version \"%s\" not " |
210 | "in format x.y.z", version); | |
211 | } | |
212 | } else { | |
213 | /* Backward compatibility with old databases. */ | |
214 | version = ""; | |
215 | } | |
216 | ||
6aa09313 BP |
217 | schema = ovsdb_schema_create(json_string(name), version, |
218 | cksum ? json_string(cksum) : ""); | |
f85f8ebb BP |
219 | SHASH_FOR_EACH (node, json_object(tables)) { |
220 | struct ovsdb_table_schema *table; | |
221 | ||
222 | if (node->name[0] == '_') { | |
223 | error = ovsdb_syntax_error(json, NULL, "names beginning with " | |
224 | "\"_\" are reserved"); | |
b966380b BP |
225 | } else if (!ovsdb_parser_is_id(node->name)) { |
226 | error = ovsdb_syntax_error(json, NULL, "name must be a valid id"); | |
f85f8ebb BP |
227 | } else { |
228 | error = ovsdb_table_schema_from_json(node->data, node->name, | |
229 | &table); | |
230 | } | |
231 | if (error) { | |
232 | ovsdb_schema_destroy(schema); | |
233 | return error; | |
234 | } | |
235 | ||
236 | shash_add(&schema->tables, table->name, table); | |
237 | } | |
0d0f05b9 | 238 | |
42a49b96 BP |
239 | /* "isRoot" was not part of the original schema definition. Before it was |
240 | * added, there was no support for garbage collection. So, for backward | |
241 | * compatibility, if the root set is empty then assume that every table is | |
242 | * in the root set. */ | |
243 | if (root_set_size(schema) == 0) { | |
244 | SHASH_FOR_EACH (node, &schema->tables) { | |
245 | struct ovsdb_table_schema *table = node->data; | |
246 | ||
247 | table->is_root = true; | |
248 | } | |
249 | } | |
250 | ||
251 | /* Validate that all refTables refer to the names of tables that exist. | |
252 | * | |
253 | * Also force certain columns to be persistent, as explained in | |
254 | * ovsdb_schema_check_ref_table(). This requires 'is_root' to be known, so | |
255 | * this must follow the loop updating 'is_root' above. */ | |
0d0f05b9 BP |
256 | SHASH_FOR_EACH (node, &schema->tables) { |
257 | struct ovsdb_table_schema *table = node->data; | |
258 | struct shash_node *node2; | |
259 | ||
260 | SHASH_FOR_EACH (node2, &table->columns) { | |
261 | struct ovsdb_column *column = node2->data; | |
262 | ||
263 | error = ovsdb_schema_check_ref_table(column, &schema->tables, | |
264 | &column->type.key, "key"); | |
265 | if (!error) { | |
266 | error = ovsdb_schema_check_ref_table(column, &schema->tables, | |
267 | &column->type.value, | |
268 | "value"); | |
269 | } | |
270 | if (error) { | |
271 | ovsdb_schema_destroy(schema); | |
272 | return error; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
f85f8ebb | 277 | *schemap = schema; |
e3c17733 | 278 | return NULL; |
f85f8ebb BP |
279 | } |
280 | ||
281 | struct json * | |
282 | ovsdb_schema_to_json(const struct ovsdb_schema *schema) | |
283 | { | |
284 | struct json *json, *tables; | |
285 | struct shash_node *node; | |
c5f341ab | 286 | bool default_is_root; |
f85f8ebb BP |
287 | |
288 | json = json_object_create(); | |
289 | json_object_put_string(json, "name", schema->name); | |
8159b984 BP |
290 | if (schema->version[0]) { |
291 | json_object_put_string(json, "version", schema->version); | |
292 | } | |
6aa09313 BP |
293 | if (schema->cksum[0]) { |
294 | json_object_put_string(json, "cksum", schema->cksum); | |
295 | } | |
f85f8ebb | 296 | |
c5f341ab BP |
297 | /* "isRoot" was not part of the original schema definition. Before it was |
298 | * added, there was no support for garbage collection. So, for backward | |
299 | * compatibility, if every table is in the root set then do not output | |
300 | * "isRoot" in table schemas. */ | |
301 | default_is_root = root_set_size(schema) == shash_count(&schema->tables); | |
302 | ||
f85f8ebb BP |
303 | tables = json_object_create(); |
304 | ||
305 | SHASH_FOR_EACH (node, &schema->tables) { | |
306 | struct ovsdb_table_schema *table = node->data; | |
307 | json_object_put(tables, table->name, | |
c5f341ab | 308 | ovsdb_table_schema_to_json(table, default_is_root)); |
f85f8ebb BP |
309 | } |
310 | json_object_put(json, "tables", tables); | |
311 | ||
312 | return json; | |
313 | } | |
403e3a25 BP |
314 | |
315 | /* Returns true if 'a' and 'b' specify equivalent schemas, false if they | |
316 | * differ. */ | |
317 | bool | |
318 | ovsdb_schema_equal(const struct ovsdb_schema *a, | |
319 | const struct ovsdb_schema *b) | |
320 | { | |
321 | /* This implementation is simple, stupid, and slow, but I doubt that it | |
322 | * will ever require much maintenance. */ | |
323 | struct json *ja = ovsdb_schema_to_json(a); | |
324 | struct json *jb = ovsdb_schema_to_json(b); | |
325 | bool equals = json_equal(ja, jb); | |
326 | json_destroy(ja); | |
327 | json_destroy(jb); | |
328 | ||
329 | return equals; | |
330 | } | |
1b1d2e6d BP |
331 | |
332 | struct ovsdb_error * OVS_WARN_UNUSED_RESULT | |
333 | ovsdb_schema_check_for_ephemeral_columns(const struct ovsdb_schema *schema) | |
334 | { | |
335 | struct shash_node *node; | |
336 | SHASH_FOR_EACH (node, &schema->tables) { | |
337 | struct ovsdb_table_schema *table = node->data; | |
338 | struct shash_node *node2; | |
339 | ||
340 | SHASH_FOR_EACH (node2, &table->columns) { | |
341 | struct ovsdb_column *column = node2->data; | |
342 | ||
343 | if (column->index >= OVSDB_N_STD_COLUMNS && !column->persistent) { | |
344 | return ovsdb_syntax_error( | |
345 | NULL, NULL, "Table %s column %s is ephemeral but " | |
346 | "clustered databases do not support ephemeral columns.", | |
347 | table->name, column->name); | |
348 | } | |
349 | } | |
350 | } | |
351 | return NULL; | |
352 | } | |
353 | ||
354 | void | |
355 | ovsdb_schema_persist_ephemeral_columns(struct ovsdb_schema *schema, | |
356 | const char *filename) | |
357 | { | |
358 | int n = 0; | |
359 | const char *example_table = NULL; | |
360 | const char *example_column = NULL; | |
361 | ||
362 | struct shash_node *node; | |
363 | SHASH_FOR_EACH (node, &schema->tables) { | |
364 | struct ovsdb_table_schema *table = node->data; | |
365 | struct shash_node *node2; | |
366 | ||
367 | SHASH_FOR_EACH (node2, &table->columns) { | |
368 | struct ovsdb_column *column = node2->data; | |
369 | ||
370 | if (column->index >= OVSDB_N_STD_COLUMNS && !column->persistent) { | |
371 | column->persistent = true; | |
372 | example_table = table->name; | |
373 | example_column = column->name; | |
374 | n++; | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | if (n) { | |
380 | VLOG_WARN("%s: changed %d columns in '%s' database from ephemeral to " | |
381 | "persistent, including '%s' column in '%s' table, because " | |
382 | "clusters do not support ephemeral columns", | |
383 | filename, n, schema->name, example_column, example_table); | |
384 | } | |
385 | } | |
f85f8ebb | 386 | \f |
0d0f05b9 BP |
387 | static void |
388 | ovsdb_set_ref_table(const struct shash *tables, | |
389 | struct ovsdb_base_type *base) | |
390 | { | |
fa37affa | 391 | if (base->type == OVSDB_TYPE_UUID && base->uuid.refTableName) { |
0d0f05b9 BP |
392 | struct ovsdb_table *table; |
393 | ||
fa37affa BP |
394 | table = shash_find_data(tables, base->uuid.refTableName); |
395 | base->uuid.refTable = table; | |
0d0f05b9 BP |
396 | } |
397 | } | |
398 | ||
1b1d2e6d BP |
399 | /* Creates and returns a new ovsdb based on 'schema' and 'storage' and takes |
400 | * ownership of both. | |
401 | * | |
402 | * At least one of the arguments must be nonnull. */ | |
f85f8ebb | 403 | struct ovsdb * |
1b1d2e6d | 404 | ovsdb_create(struct ovsdb_schema *schema, struct ovsdb_storage *storage) |
f85f8ebb BP |
405 | { |
406 | struct shash_node *node; | |
407 | struct ovsdb *db; | |
408 | ||
1b1d2e6d BP |
409 | db = xzalloc(sizeof *db); |
410 | db->name = xstrdup(schema | |
411 | ? schema->name | |
412 | : ovsdb_storage_get_name(storage)); | |
f85f8ebb | 413 | db->schema = schema; |
1b1d2e6d | 414 | db->storage = storage; |
009bf21f | 415 | ovs_list_init(&db->monitors); |
417e7e66 | 416 | ovs_list_init(&db->triggers); |
f85f8ebb BP |
417 | db->run_triggers = false; |
418 | ||
419 | shash_init(&db->tables); | |
1b1d2e6d BP |
420 | if (schema) { |
421 | SHASH_FOR_EACH (node, &schema->tables) { | |
422 | struct ovsdb_table_schema *ts = node->data; | |
423 | shash_add(&db->tables, node->name, ovsdb_table_create(ts)); | |
424 | } | |
f85f8ebb | 425 | |
1b1d2e6d BP |
426 | /* Set all the refTables. */ |
427 | SHASH_FOR_EACH (node, &schema->tables) { | |
428 | struct ovsdb_table_schema *table = node->data; | |
429 | struct shash_node *node2; | |
0d0f05b9 | 430 | |
1b1d2e6d BP |
431 | SHASH_FOR_EACH (node2, &table->columns) { |
432 | struct ovsdb_column *column = node2->data; | |
0d0f05b9 | 433 | |
1b1d2e6d BP |
434 | ovsdb_set_ref_table(&db->tables, &column->type.key); |
435 | ovsdb_set_ref_table(&db->tables, &column->type.value); | |
436 | } | |
0d0f05b9 BP |
437 | } |
438 | } | |
439 | ||
d6db7b3c LR |
440 | /* Use RBAC roles table if present. */ |
441 | db->rbac_role = ovsdb_get_table(db, "RBAC_Role"); | |
442 | ||
f85f8ebb BP |
443 | return db; |
444 | } | |
445 | ||
f85f8ebb BP |
446 | void |
447 | ovsdb_destroy(struct ovsdb *db) | |
448 | { | |
449 | if (db) { | |
450 | struct shash_node *node; | |
451 | ||
120fb2ca | 452 | /* Close the log. */ |
1b1d2e6d | 453 | ovsdb_storage_close(db->storage); |
120fb2ca | 454 | |
009bf21f BP |
455 | /* Remove all the monitors. */ |
456 | ovsdb_monitors_remove(db); | |
bd06962a | 457 | |
695e8150 HZ |
458 | /* Destroy txn history. */ |
459 | ovsdb_txn_history_destroy(db); | |
460 | ||
1b1d2e6d BP |
461 | /* The caller must ensure that no triggers remain. */ |
462 | ovs_assert(ovs_list_is_empty(&db->triggers)); | |
463 | ||
f85f8ebb BP |
464 | /* Delete all the tables. This also deletes their schemas. */ |
465 | SHASH_FOR_EACH (node, &db->tables) { | |
466 | struct ovsdb_table *table = node->data; | |
467 | ovsdb_table_destroy(table); | |
468 | } | |
469 | shash_destroy(&db->tables); | |
470 | ||
1248fcd2 BP |
471 | /* The schemas, but not the table that points to them, were deleted in |
472 | * the previous step, so we need to clear out the table. We can't | |
473 | * destroy the table, because ovsdb_schema_destroy() will do that. */ | |
1b1d2e6d BP |
474 | if (db->schema) { |
475 | shash_clear(&db->schema->tables); | |
476 | ovsdb_schema_destroy(db->schema); | |
477 | } | |
f85f8ebb | 478 | |
1b1d2e6d | 479 | free(db->name); |
f85f8ebb BP |
480 | free(db); |
481 | } | |
482 | } | |
483 | ||
0d085684 BP |
484 | /* Adds some memory usage statistics for 'db' into 'usage', for use with |
485 | * memory_report(). */ | |
486 | void | |
487 | ovsdb_get_memory_usage(const struct ovsdb *db, struct simap *usage) | |
488 | { | |
1b1d2e6d BP |
489 | if (!db->schema) { |
490 | return; | |
491 | } | |
492 | ||
0d085684 BP |
493 | const struct shash_node *node; |
494 | unsigned int cells = 0; | |
495 | ||
496 | SHASH_FOR_EACH (node, &db->tables) { | |
497 | const struct ovsdb_table *table = node->data; | |
498 | unsigned int n_columns = shash_count(&table->schema->columns); | |
499 | unsigned int n_rows = hmap_count(&table->rows); | |
500 | ||
501 | cells += n_rows * n_columns; | |
502 | } | |
503 | ||
504 | simap_increase(usage, "cells", cells); | |
505 | } | |
506 | ||
f85f8ebb BP |
507 | struct ovsdb_table * |
508 | ovsdb_get_table(const struct ovsdb *db, const char *name) | |
509 | { | |
510 | return shash_find_data(&db->tables, name); | |
511 | } | |
1b1d2e6d BP |
512 | |
513 | struct ovsdb_error * OVS_WARN_UNUSED_RESULT | |
514 | ovsdb_snapshot(struct ovsdb *db) | |
515 | { | |
516 | if (!db->storage) { | |
517 | return NULL; | |
518 | } | |
519 | ||
520 | struct json *schema = ovsdb_schema_to_json(db->schema); | |
521 | struct json *data = ovsdb_to_txn_json(db, "compacting database online"); | |
522 | struct ovsdb_error *error = ovsdb_storage_store_snapshot(db->storage, | |
523 | schema, data); | |
524 | json_destroy(schema); | |
525 | json_destroy(data); | |
526 | return error; | |
527 | } | |
528 | ||
529 | void | |
530 | ovsdb_replace(struct ovsdb *dst, struct ovsdb *src) | |
531 | { | |
532 | /* Cancel monitors. */ | |
533 | ovsdb_monitor_prereplace_db(dst); | |
534 | ||
535 | /* Cancel triggers. */ | |
536 | struct ovsdb_trigger *trigger, *next; | |
537 | LIST_FOR_EACH_SAFE (trigger, next, node, &dst->triggers) { | |
538 | ovsdb_trigger_prereplace_db(trigger); | |
539 | } | |
540 | ||
695e8150 HZ |
541 | /* Destroy txn history. */ |
542 | ovsdb_txn_history_destroy(dst); | |
543 | ||
1b1d2e6d BP |
544 | struct ovsdb_schema *tmp_schema = dst->schema; |
545 | dst->schema = src->schema; | |
546 | src->schema = tmp_schema; | |
547 | ||
548 | shash_swap(&dst->tables, &src->tables); | |
549 | ||
550 | dst->rbac_role = ovsdb_get_table(dst, "RBAC_Role"); | |
551 | ||
552 | ovsdb_destroy(src); | |
553 | } |