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2fa1df7b | 1 | /* |
c1efab9b | 2 | * Copyright (c) 2015, 2017 Nicira, Inc. |
2fa1df7b AZ |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include <errno.h> | |
20 | ||
21 | #include "bitmap.h" | |
22 | #include "column.h" | |
3e8a2ad1 | 23 | #include "openvswitch/dynamic-string.h" |
ee89ea7b | 24 | #include "openvswitch/json.h" |
2fa1df7b AZ |
25 | #include "jsonrpc.h" |
26 | #include "ovsdb-error.h" | |
27 | #include "ovsdb-parser.h" | |
28 | #include "ovsdb.h" | |
29 | #include "row.h" | |
71cdf7cd | 30 | #include "condition.h" |
2fa1df7b | 31 | #include "simap.h" |
7e911055 | 32 | #include "hash.h" |
2fa1df7b | 33 | #include "table.h" |
6e5a9216 | 34 | #include "hash.h" |
2fa1df7b AZ |
35 | #include "timeval.h" |
36 | #include "transaction.h" | |
37 | #include "jsonrpc-server.h" | |
38 | #include "monitor.h" | |
ee89ea7b | 39 | #include "util.h" |
2fa1df7b AZ |
40 | #include "openvswitch/vlog.h" |
41 | ||
71cdf7cd | 42 | VLOG_DEFINE_THIS_MODULE(ovsdb_monitor); |
2fa1df7b | 43 | |
6e5a9216 | 44 | static struct hmap ovsdb_monitors = HMAP_INITIALIZER(&ovsdb_monitors); |
2fa1df7b | 45 | |
71cdf7cd LS |
46 | /* Keep state of session's conditions */ |
47 | struct ovsdb_monitor_session_condition { | |
e4ef6881 | 48 | bool conditional; /* True iff every table's condition is true. */ |
71cdf7cd LS |
49 | struct shash tables; /* Contains |
50 | * "struct ovsdb_monitor_table_condition *"s. */ | |
51 | }; | |
52 | ||
53 | /* Monitored table session's conditions */ | |
54 | struct ovsdb_monitor_table_condition { | |
55 | const struct ovsdb_table *table; | |
56 | struct ovsdb_monitor_table *mt; | |
57 | struct ovsdb_condition old_condition; | |
58 | struct ovsdb_condition new_condition; | |
59 | }; | |
60 | ||
2fa1df7b AZ |
61 | /* Backend monitor. |
62 | * | |
63 | * ovsdb_monitor keep track of the ovsdb changes. | |
64 | */ | |
65 | ||
66 | /* A collection of tables being monitored. */ | |
67 | struct ovsdb_monitor { | |
009bf21f | 68 | struct ovs_list list_node; /* In struct ovsdb's "monitors" list. */ |
2fa1df7b | 69 | struct shash tables; /* Holds "struct ovsdb_monitor_table"s. */ |
d9412837 | 70 | struct ovs_list jsonrpc_monitors; /* Contains "jsonrpc_monitor_node"s. */ |
2fa1df7b | 71 | struct ovsdb *db; |
59c35e11 | 72 | uint64_t n_transactions; /* Count number of committed transactions. */ |
6e5a9216 | 73 | struct hmap_node hmap_node; /* Elements within ovsdb_monitors. */ |
4c280978 AZ |
74 | struct hmap json_cache; /* Contains "ovsdb_monitor_json_cache_node"s.*/ |
75 | }; | |
76 | ||
77 | /* A json object of updates between 'from_txn' and 'dbmon->n_transactions' | |
78 | * inclusive. */ | |
79 | struct ovsdb_monitor_json_cache_node { | |
80 | struct hmap_node hmap_node; /* Elements in json cache. */ | |
a32b4433 | 81 | enum ovsdb_monitor_version version; |
4c280978 AZ |
82 | uint64_t from_txn; |
83 | struct json *json; /* Null, or a cloned of json */ | |
2fa1df7b AZ |
84 | }; |
85 | ||
d9412837 | 86 | struct jsonrpc_monitor_node { |
d9412837 | 87 | struct ovs_list node; |
ad376c93 | 88 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor; |
d9412837 AZ |
89 | }; |
90 | ||
2fa1df7b AZ |
91 | /* A particular column being monitored. */ |
92 | struct ovsdb_monitor_column { | |
93 | const struct ovsdb_column *column; | |
94 | enum ovsdb_monitor_selection select; | |
6150a75f | 95 | bool monitored; |
2fa1df7b AZ |
96 | }; |
97 | ||
98 | /* A row that has changed in a monitored table. */ | |
99 | struct ovsdb_monitor_row { | |
100 | struct hmap_node hmap_node; /* In ovsdb_jsonrpc_monitor_table.changes. */ | |
101 | struct uuid uuid; /* UUID of row that changed. */ | |
102 | struct ovsdb_datum *old; /* Old data, NULL for an inserted row. */ | |
103 | struct ovsdb_datum *new; /* New data, NULL for a deleted row. */ | |
104 | }; | |
105 | ||
1158f320 AZ |
106 | /* Contains 'struct ovsdb_monitor_row's for rows that have been |
107 | * updated but not yet flushed to all the jsonrpc connection. | |
108 | * | |
109 | * 'n_refs' represent the number of jsonrpc connections that have | |
110 | * not received updates. Generate the update for the last jsonprc | |
111 | * connection will also destroy the whole "struct ovsdb_monitor_changes" | |
112 | * object. | |
113 | * | |
114 | * 'transaction' stores the first update's transaction id. | |
115 | * */ | |
116 | struct ovsdb_monitor_changes { | |
ad376c93 JS |
117 | struct hmap_node hmap_node; /* Element in ovsdb_monitor_tables' changes |
118 | hmap. */ | |
1158f320 AZ |
119 | struct ovsdb_monitor_table *mt; |
120 | struct hmap rows; | |
121 | int n_refs; | |
122 | uint64_t transaction; | |
123 | }; | |
124 | ||
2fa1df7b AZ |
125 | /* A particular table being monitored. */ |
126 | struct ovsdb_monitor_table { | |
127 | const struct ovsdb_table *table; | |
128 | ||
129 | /* This is the union (bitwise-OR) of the 'select' values in all of the | |
130 | * members of 'columns' below. */ | |
131 | enum ovsdb_monitor_selection select; | |
132 | ||
133 | /* Columns being monitored. */ | |
134 | struct ovsdb_monitor_column *columns; | |
135 | size_t n_columns; | |
6150a75f LS |
136 | size_t n_monitored_columns; |
137 | size_t allocated_columns; | |
2fa1df7b | 138 | |
ec1eadce LS |
139 | /* Columns in ovsdb_monitor_row have different indexes then in |
140 | * ovsdb_row. This field maps between column->index to the index in the | |
141 | * ovsdb_monitor_row. It is used for condition evaluation. */ | |
142 | unsigned int *columns_index_map; | |
143 | ||
7e911055 AZ |
144 | /* Contains 'ovsdb_monitor_changes' indexed by 'transaction'. */ |
145 | struct hmap changes; | |
2fa1df7b AZ |
146 | }; |
147 | ||
845a1187 LS |
148 | enum ovsdb_monitor_row_type { |
149 | OVSDB_ROW, | |
150 | OVSDB_MONITOR_ROW | |
151 | }; | |
152 | ||
52553aea | 153 | typedef struct json * |
71cdf7cd LS |
154 | (*compose_row_update_cb_func) |
155 | (const struct ovsdb_monitor_table *mt, | |
156 | const struct ovsdb_monitor_session_condition * condition, | |
845a1187 LS |
157 | enum ovsdb_monitor_row_type row_type, |
158 | const void *, | |
71cdf7cd | 159 | bool initial, unsigned long int *changed); |
52553aea | 160 | |
d9412837 | 161 | static void ovsdb_monitor_destroy(struct ovsdb_monitor *dbmon); |
6e5a9216 AZ |
162 | static struct ovsdb_monitor_changes * ovsdb_monitor_table_add_changes( |
163 | struct ovsdb_monitor_table *mt, uint64_t next_txn); | |
7e911055 AZ |
164 | static struct ovsdb_monitor_changes *ovsdb_monitor_table_find_changes( |
165 | struct ovsdb_monitor_table *mt, uint64_t unflushed); | |
1158f320 AZ |
166 | static void ovsdb_monitor_changes_destroy( |
167 | struct ovsdb_monitor_changes *changes); | |
168 | static void ovsdb_monitor_table_track_changes(struct ovsdb_monitor_table *mt, | |
7e911055 | 169 | uint64_t unflushed); |
d9412837 | 170 | |
a32b4433 HZ |
171 | static uint32_t |
172 | json_cache_hash(enum ovsdb_monitor_version version, uint64_t from_txn) | |
173 | { | |
174 | uint32_t hash; | |
175 | ||
176 | hash = hash_uint64(version); | |
177 | hash = hash_uint64_basis(from_txn, hash); | |
178 | ||
179 | return hash; | |
180 | } | |
181 | ||
4c280978 AZ |
182 | static struct ovsdb_monitor_json_cache_node * |
183 | ovsdb_monitor_json_cache_search(const struct ovsdb_monitor *dbmon, | |
a32b4433 | 184 | enum ovsdb_monitor_version version, |
4c280978 AZ |
185 | uint64_t from_txn) |
186 | { | |
187 | struct ovsdb_monitor_json_cache_node *node; | |
a32b4433 | 188 | uint32_t hash = json_cache_hash(version, from_txn); |
4c280978 AZ |
189 | |
190 | HMAP_FOR_EACH_WITH_HASH(node, hmap_node, hash, &dbmon->json_cache) { | |
a32b4433 | 191 | if (node->from_txn == from_txn && node->version == version) { |
4c280978 AZ |
192 | return node; |
193 | } | |
194 | } | |
195 | ||
196 | return NULL; | |
197 | } | |
198 | ||
199 | static void | |
200 | ovsdb_monitor_json_cache_insert(struct ovsdb_monitor *dbmon, | |
a32b4433 | 201 | enum ovsdb_monitor_version version, |
4c280978 AZ |
202 | uint64_t from_txn, struct json *json) |
203 | { | |
204 | struct ovsdb_monitor_json_cache_node *node; | |
a32b4433 | 205 | uint32_t hash = json_cache_hash(version, from_txn); |
4c280978 AZ |
206 | |
207 | node = xmalloc(sizeof *node); | |
208 | ||
a32b4433 | 209 | node->version = version; |
4c280978 AZ |
210 | node->from_txn = from_txn; |
211 | node->json = json ? json_clone(json) : NULL; | |
212 | ||
213 | hmap_insert(&dbmon->json_cache, &node->hmap_node, hash); | |
214 | } | |
215 | ||
216 | static void | |
217 | ovsdb_monitor_json_cache_flush(struct ovsdb_monitor *dbmon) | |
218 | { | |
4ec3d7c7 | 219 | struct ovsdb_monitor_json_cache_node *node; |
4c280978 | 220 | |
4ec3d7c7 | 221 | HMAP_FOR_EACH_POP(node, hmap_node, &dbmon->json_cache) { |
4c280978 AZ |
222 | json_destroy(node->json); |
223 | free(node); | |
224 | } | |
225 | } | |
226 | ||
2fa1df7b AZ |
227 | static int |
228 | compare_ovsdb_monitor_column(const void *a_, const void *b_) | |
229 | { | |
230 | const struct ovsdb_monitor_column *a = a_; | |
231 | const struct ovsdb_monitor_column *b = b_; | |
232 | ||
6150a75f LS |
233 | /* put all monitored columns at the begining */ |
234 | if (a->monitored != b->monitored) { | |
235 | return a->monitored ? -1 : 1; | |
236 | } | |
237 | ||
2fa1df7b AZ |
238 | return a->column < b->column ? -1 : a->column > b->column; |
239 | } | |
240 | ||
1158f320 | 241 | /* Finds and returns the ovsdb_monitor_row in 'mt->changes->rows' for the |
2fa1df7b AZ |
242 | * given 'uuid', or NULL if there is no such row. */ |
243 | static struct ovsdb_monitor_row * | |
7e911055 AZ |
244 | ovsdb_monitor_changes_row_find(const struct ovsdb_monitor_changes *changes, |
245 | const struct uuid *uuid) | |
2fa1df7b AZ |
246 | { |
247 | struct ovsdb_monitor_row *row; | |
248 | ||
1158f320 | 249 | HMAP_FOR_EACH_WITH_HASH (row, hmap_node, uuid_hash(uuid), |
7e911055 | 250 | &changes->rows) { |
2fa1df7b AZ |
251 | if (uuid_equals(uuid, &row->uuid)) { |
252 | return row; | |
253 | } | |
254 | } | |
255 | return NULL; | |
256 | } | |
257 | ||
258 | /* Allocates an array of 'mt->n_columns' ovsdb_datums and initializes them as | |
259 | * copies of the data in 'row' drawn from the columns represented by | |
260 | * mt->columns[]. Returns the array. | |
261 | * | |
262 | * If 'row' is NULL, returns NULL. */ | |
263 | static struct ovsdb_datum * | |
264 | clone_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
265 | const struct ovsdb_row *row) | |
266 | { | |
267 | struct ovsdb_datum *data; | |
268 | size_t i; | |
269 | ||
270 | if (!row) { | |
271 | return NULL; | |
272 | } | |
273 | ||
274 | data = xmalloc(mt->n_columns * sizeof *data); | |
275 | for (i = 0; i < mt->n_columns; i++) { | |
276 | const struct ovsdb_column *c = mt->columns[i].column; | |
277 | const struct ovsdb_datum *src = &row->fields[c->index]; | |
278 | struct ovsdb_datum *dst = &data[i]; | |
279 | const struct ovsdb_type *type = &c->type; | |
280 | ||
281 | ovsdb_datum_clone(dst, src, type); | |
282 | } | |
283 | return data; | |
284 | } | |
285 | ||
286 | /* Replaces the mt->n_columns ovsdb_datums in row[] by copies of the data from | |
287 | * in 'row' drawn from the columns represented by mt->columns[]. */ | |
288 | static void | |
289 | update_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
290 | const struct ovsdb_row *row, | |
291 | struct ovsdb_datum *data) | |
292 | { | |
293 | size_t i; | |
294 | ||
295 | for (i = 0; i < mt->n_columns; i++) { | |
296 | const struct ovsdb_column *c = mt->columns[i].column; | |
297 | const struct ovsdb_datum *src = &row->fields[c->index]; | |
298 | struct ovsdb_datum *dst = &data[i]; | |
299 | const struct ovsdb_type *type = &c->type; | |
300 | ||
301 | if (!ovsdb_datum_equals(src, dst, type)) { | |
302 | ovsdb_datum_destroy(dst, type); | |
303 | ovsdb_datum_clone(dst, src, type); | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
308 | /* Frees all of the mt->n_columns ovsdb_datums in data[], using the types taken | |
309 | * from mt->columns[], plus 'data' itself. */ | |
310 | static void | |
311 | free_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
312 | struct ovsdb_datum *data) | |
313 | { | |
314 | if (data) { | |
315 | size_t i; | |
316 | ||
317 | for (i = 0; i < mt->n_columns; i++) { | |
318 | const struct ovsdb_column *c = mt->columns[i].column; | |
319 | ||
320 | ovsdb_datum_destroy(&data[i], &c->type); | |
321 | } | |
322 | free(data); | |
323 | } | |
324 | } | |
325 | ||
326 | /* Frees 'row', which must have been created from 'mt'. */ | |
327 | static void | |
328 | ovsdb_monitor_row_destroy(const struct ovsdb_monitor_table *mt, | |
329 | struct ovsdb_monitor_row *row) | |
330 | { | |
331 | if (row) { | |
332 | free_monitor_row_data(mt, row->old); | |
333 | free_monitor_row_data(mt, row->new); | |
334 | free(row); | |
335 | } | |
336 | } | |
337 | ||
ec1eadce LS |
338 | static void |
339 | ovsdb_monitor_columns_sort(struct ovsdb_monitor *dbmon) | |
340 | { | |
341 | int i; | |
342 | struct shash_node *node; | |
343 | ||
344 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
345 | struct ovsdb_monitor_table *mt = node->data; | |
346 | ||
347 | qsort(mt->columns, mt->n_columns, sizeof *mt->columns, | |
348 | compare_ovsdb_monitor_column); | |
349 | for (i = 0; i < mt->n_columns; i++) { | |
350 | /* re-set index map due to sort */ | |
351 | mt->columns_index_map[mt->columns[i].column->index] = i; | |
352 | } | |
353 | } | |
354 | } | |
355 | ||
6e5a9216 | 356 | void |
36247a75 AZ |
357 | ovsdb_monitor_add_jsonrpc_monitor(struct ovsdb_monitor *dbmon, |
358 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor) | |
359 | { | |
360 | struct jsonrpc_monitor_node *jm; | |
361 | ||
362 | jm = xzalloc(sizeof *jm); | |
363 | jm->jsonrpc_monitor = jsonrpc_monitor; | |
417e7e66 | 364 | ovs_list_push_back(&dbmon->jsonrpc_monitors, &jm->node); |
36247a75 AZ |
365 | } |
366 | ||
2fa1df7b AZ |
367 | struct ovsdb_monitor * |
368 | ovsdb_monitor_create(struct ovsdb *db, | |
369 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor) | |
370 | { | |
371 | struct ovsdb_monitor *dbmon; | |
372 | ||
373 | dbmon = xzalloc(sizeof *dbmon); | |
374 | ||
009bf21f | 375 | ovs_list_push_back(&db->monitors, &dbmon->list_node); |
417e7e66 | 376 | ovs_list_init(&dbmon->jsonrpc_monitors); |
2fa1df7b | 377 | dbmon->db = db; |
59c35e11 | 378 | dbmon->n_transactions = 0; |
2fa1df7b | 379 | shash_init(&dbmon->tables); |
6e5a9216 | 380 | hmap_node_nullify(&dbmon->hmap_node); |
4c280978 | 381 | hmap_init(&dbmon->json_cache); |
2fa1df7b | 382 | |
36247a75 | 383 | ovsdb_monitor_add_jsonrpc_monitor(dbmon, jsonrpc_monitor); |
2fa1df7b AZ |
384 | return dbmon; |
385 | } | |
386 | ||
387 | void | |
388 | ovsdb_monitor_add_table(struct ovsdb_monitor *m, | |
389 | const struct ovsdb_table *table) | |
390 | { | |
391 | struct ovsdb_monitor_table *mt; | |
ec1eadce LS |
392 | int i; |
393 | size_t n_columns = shash_count(&table->schema->columns); | |
2fa1df7b AZ |
394 | |
395 | mt = xzalloc(sizeof *mt); | |
396 | mt->table = table; | |
2fa1df7b | 397 | shash_add(&m->tables, table->schema->name, mt); |
7e911055 | 398 | hmap_init(&mt->changes); |
ec1eadce LS |
399 | mt->columns_index_map = |
400 | xmalloc(sizeof *mt->columns_index_map * n_columns); | |
401 | for (i = 0; i < n_columns; i++) { | |
402 | mt->columns_index_map[i] = -1; | |
403 | } | |
2fa1df7b AZ |
404 | } |
405 | ||
ec1eadce | 406 | const char * |
2fa1df7b AZ |
407 | ovsdb_monitor_add_column(struct ovsdb_monitor *dbmon, |
408 | const struct ovsdb_table *table, | |
409 | const struct ovsdb_column *column, | |
410 | enum ovsdb_monitor_selection select, | |
6150a75f | 411 | bool monitored) |
2fa1df7b AZ |
412 | { |
413 | struct ovsdb_monitor_table *mt; | |
414 | struct ovsdb_monitor_column *c; | |
415 | ||
416 | mt = shash_find_data(&dbmon->tables, table->schema->name); | |
417 | ||
ec1eadce LS |
418 | /* Check for column duplication. Return duplicated column name. */ |
419 | if (mt->columns_index_map[column->index] != -1) { | |
420 | return column->name; | |
421 | } | |
422 | ||
6150a75f LS |
423 | if (mt->n_columns >= mt->allocated_columns) { |
424 | mt->columns = x2nrealloc(mt->columns, &mt->allocated_columns, | |
2fa1df7b AZ |
425 | sizeof *mt->columns); |
426 | } | |
427 | ||
428 | mt->select |= select; | |
ec1eadce | 429 | mt->columns_index_map[column->index] = mt->n_columns; |
2fa1df7b AZ |
430 | c = &mt->columns[mt->n_columns++]; |
431 | c->column = column; | |
432 | c->select = select; | |
6150a75f LS |
433 | c->monitored = monitored; |
434 | if (monitored) { | |
435 | mt->n_monitored_columns++; | |
436 | } | |
2fa1df7b AZ |
437 | |
438 | return NULL; | |
439 | } | |
440 | ||
71cdf7cd LS |
441 | static void |
442 | ovsdb_monitor_condition_add_columns(struct ovsdb_monitor *dbmon, | |
443 | const struct ovsdb_table *table, | |
444 | struct ovsdb_condition *condition) | |
445 | { | |
446 | size_t n_columns; | |
447 | int i; | |
448 | const struct ovsdb_column **columns = | |
449 | ovsdb_condition_get_columns(condition, &n_columns); | |
450 | ||
451 | for (i = 0; i < n_columns; i++) { | |
452 | ovsdb_monitor_add_column(dbmon, table, columns[i], | |
453 | OJMS_NONE, false); | |
454 | } | |
455 | ||
456 | free(columns); | |
457 | } | |
458 | ||
459 | /* Bind this session's condition to ovsdb_monitor */ | |
460 | void | |
461 | ovsdb_monitor_condition_bind(struct ovsdb_monitor *dbmon, | |
462 | struct ovsdb_monitor_session_condition *cond) | |
463 | { | |
464 | struct shash_node *node; | |
465 | ||
466 | SHASH_FOR_EACH(node, &cond->tables) { | |
467 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
468 | struct ovsdb_monitor_table *mt = | |
469 | shash_find_data(&dbmon->tables, mtc->table->schema->name); | |
470 | ||
471 | mtc->mt = mt; | |
472 | ovsdb_monitor_condition_add_columns(dbmon, mtc->table, | |
473 | &mtc->new_condition); | |
474 | } | |
475 | } | |
476 | ||
845a1187 LS |
477 | bool |
478 | ovsdb_monitor_table_exists(struct ovsdb_monitor *m, | |
479 | const struct ovsdb_table *table) | |
480 | { | |
481 | return shash_find_data(&m->tables, table->schema->name); | |
482 | } | |
483 | ||
6e5a9216 | 484 | static struct ovsdb_monitor_changes * |
1158f320 AZ |
485 | ovsdb_monitor_table_add_changes(struct ovsdb_monitor_table *mt, |
486 | uint64_t next_txn) | |
487 | { | |
488 | struct ovsdb_monitor_changes *changes; | |
489 | ||
490 | changes = xzalloc(sizeof *changes); | |
491 | ||
492 | changes->transaction = next_txn; | |
493 | changes->mt = mt; | |
494 | changes->n_refs = 1; | |
495 | hmap_init(&changes->rows); | |
7e911055 | 496 | hmap_insert(&mt->changes, &changes->hmap_node, hash_uint64(next_txn)); |
6e5a9216 AZ |
497 | |
498 | return changes; | |
7e911055 AZ |
499 | }; |
500 | ||
501 | static struct ovsdb_monitor_changes * | |
502 | ovsdb_monitor_table_find_changes(struct ovsdb_monitor_table *mt, | |
503 | uint64_t transaction) | |
504 | { | |
505 | struct ovsdb_monitor_changes *changes; | |
506 | size_t hash = hash_uint64(transaction); | |
507 | ||
508 | HMAP_FOR_EACH_WITH_HASH(changes, hmap_node, hash, &mt->changes) { | |
509 | if (changes->transaction == transaction) { | |
510 | return changes; | |
511 | } | |
512 | } | |
513 | ||
514 | return NULL; | |
1158f320 AZ |
515 | } |
516 | ||
fcd48081 | 517 | /* Stop currently tracking changes to table 'mt' since 'transaction'. */ |
1158f320 AZ |
518 | static void |
519 | ovsdb_monitor_table_untrack_changes(struct ovsdb_monitor_table *mt, | |
520 | uint64_t transaction) | |
521 | { | |
7e911055 AZ |
522 | struct ovsdb_monitor_changes *changes = |
523 | ovsdb_monitor_table_find_changes(mt, transaction); | |
1158f320 | 524 | if (changes) { |
1158f320 | 525 | if (--changes->n_refs == 0) { |
7e911055 | 526 | hmap_remove(&mt->changes, &changes->hmap_node); |
1158f320 | 527 | ovsdb_monitor_changes_destroy(changes); |
1158f320 AZ |
528 | } |
529 | } | |
530 | } | |
531 | ||
532 | /* Start tracking changes to table 'mt' begins from 'transaction' inclusive. | |
533 | */ | |
534 | static void | |
535 | ovsdb_monitor_table_track_changes(struct ovsdb_monitor_table *mt, | |
536 | uint64_t transaction) | |
537 | { | |
7e911055 AZ |
538 | struct ovsdb_monitor_changes *changes; |
539 | ||
540 | changes = ovsdb_monitor_table_find_changes(mt, transaction); | |
541 | if (changes) { | |
542 | changes->n_refs++; | |
543 | } else { | |
544 | ovsdb_monitor_table_add_changes(mt, transaction); | |
545 | } | |
1158f320 AZ |
546 | } |
547 | ||
548 | static void | |
549 | ovsdb_monitor_changes_destroy(struct ovsdb_monitor_changes *changes) | |
550 | { | |
551 | struct ovsdb_monitor_row *row, *next; | |
552 | ||
553 | HMAP_FOR_EACH_SAFE (row, next, hmap_node, &changes->rows) { | |
554 | hmap_remove(&changes->rows, &row->hmap_node); | |
555 | ovsdb_monitor_row_destroy(changes->mt, row); | |
556 | } | |
557 | hmap_destroy(&changes->rows); | |
558 | free(changes); | |
559 | } | |
560 | ||
23cbedb7 AZ |
561 | static enum ovsdb_monitor_selection |
562 | ovsdb_monitor_row_update_type(bool initial, const bool old, const bool new) | |
563 | { | |
564 | return initial ? OJMS_INITIAL | |
565 | : !old ? OJMS_INSERT | |
566 | : !new ? OJMS_DELETE | |
567 | : OJMS_MODIFY; | |
568 | } | |
71cdf7cd LS |
569 | |
570 | /* Set conditional monitoring mode only if we have non-empty condition in one | |
571 | * of the tables at least */ | |
572 | static inline void | |
573 | ovsdb_monitor_session_condition_set_mode( | |
574 | struct ovsdb_monitor_session_condition *cond) | |
575 | { | |
e4ef6881 BP |
576 | struct shash_node *node; |
577 | ||
578 | SHASH_FOR_EACH (node, &cond->tables) { | |
579 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
580 | ||
581 | if (!ovsdb_condition_is_true(&mtc->new_condition)) { | |
582 | cond->conditional = true; | |
583 | return; | |
584 | } | |
585 | } | |
586 | cond->conditional = false; | |
71cdf7cd LS |
587 | } |
588 | ||
589 | /* Returnes an empty allocated session's condition state holder */ | |
590 | struct ovsdb_monitor_session_condition * | |
591 | ovsdb_monitor_session_condition_create(void) | |
592 | { | |
593 | struct ovsdb_monitor_session_condition *condition = | |
594 | xzalloc(sizeof *condition); | |
595 | ||
596 | condition->conditional = false; | |
597 | shash_init(&condition->tables); | |
598 | return condition; | |
599 | } | |
600 | ||
601 | void | |
602 | ovsdb_monitor_session_condition_destroy( | |
603 | struct ovsdb_monitor_session_condition *condition) | |
604 | { | |
605 | struct shash_node *node, *next; | |
606 | ||
607 | if (!condition) { | |
608 | return; | |
609 | } | |
610 | ||
611 | SHASH_FOR_EACH_SAFE (node, next, &condition->tables) { | |
612 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
613 | ||
614 | ovsdb_condition_destroy(&mtc->new_condition); | |
615 | ovsdb_condition_destroy(&mtc->old_condition); | |
616 | shash_delete(&condition->tables, node); | |
617 | free(mtc); | |
618 | } | |
d3c8a7e8 | 619 | shash_destroy(&condition->tables); |
71cdf7cd LS |
620 | free(condition); |
621 | } | |
622 | ||
623 | struct ovsdb_error * | |
624 | ovsdb_monitor_table_condition_create( | |
625 | struct ovsdb_monitor_session_condition *condition, | |
626 | const struct ovsdb_table *table, | |
627 | const struct json *json_cnd) | |
628 | { | |
629 | struct ovsdb_monitor_table_condition *mtc; | |
630 | struct ovsdb_error *error; | |
631 | ||
632 | mtc = xzalloc(sizeof *mtc); | |
633 | mtc->table = table; | |
634 | ovsdb_condition_init(&mtc->old_condition); | |
635 | ovsdb_condition_init(&mtc->new_condition); | |
636 | ||
637 | if (json_cnd) { | |
638 | error = ovsdb_condition_from_json(table->schema, | |
639 | json_cnd, | |
640 | NULL, | |
641 | &mtc->old_condition); | |
642 | if (error) { | |
643 | free(mtc); | |
644 | return error; | |
645 | } | |
646 | } | |
647 | ||
648 | shash_add(&condition->tables, table->schema->name, mtc); | |
649 | /* On session startup old == new condition */ | |
650 | ovsdb_condition_clone(&mtc->new_condition, &mtc->old_condition); | |
5707b87d | 651 | ovsdb_monitor_session_condition_set_mode(condition); |
71cdf7cd LS |
652 | |
653 | return NULL; | |
654 | } | |
655 | ||
656 | static bool | |
657 | ovsdb_monitor_get_table_conditions( | |
658 | const struct ovsdb_monitor_table *mt, | |
659 | const struct ovsdb_monitor_session_condition *condition, | |
660 | struct ovsdb_condition **old_condition, | |
661 | struct ovsdb_condition **new_condition) | |
662 | { | |
663 | if (!condition) { | |
664 | return false; | |
665 | } | |
666 | ||
667 | struct ovsdb_monitor_table_condition *mtc = | |
668 | shash_find_data(&condition->tables, mt->table->schema->name); | |
669 | ||
670 | if (!mtc) { | |
671 | return false; | |
672 | } | |
673 | *old_condition = &mtc->old_condition; | |
674 | *new_condition = &mtc->new_condition; | |
675 | ||
676 | return true; | |
677 | } | |
678 | ||
845a1187 LS |
679 | struct ovsdb_error * |
680 | ovsdb_monitor_table_condition_update( | |
681 | struct ovsdb_monitor *dbmon, | |
682 | struct ovsdb_monitor_session_condition *condition, | |
683 | const struct ovsdb_table *table, | |
684 | const struct json *cond_json) | |
685 | { | |
c1efab9b BP |
686 | if (!condition) { |
687 | return NULL; | |
688 | } | |
689 | ||
845a1187 LS |
690 | struct ovsdb_monitor_table_condition *mtc = |
691 | shash_find_data(&condition->tables, table->schema->name); | |
692 | struct ovsdb_error *error; | |
f0d7ae19 | 693 | struct ovsdb_condition cond = OVSDB_CONDITION_INITIALIZER(&cond); |
845a1187 | 694 | |
845a1187 LS |
695 | error = ovsdb_condition_from_json(table->schema, cond_json, |
696 | NULL, &cond); | |
697 | if (error) { | |
698 | return error; | |
699 | } | |
700 | ovsdb_condition_destroy(&mtc->new_condition); | |
701 | ovsdb_condition_clone(&mtc->new_condition, &cond); | |
702 | ovsdb_condition_destroy(&cond); | |
703 | ovsdb_monitor_condition_add_columns(dbmon, | |
704 | table, | |
705 | &mtc->new_condition); | |
706 | ||
707 | return NULL; | |
708 | } | |
709 | ||
710 | static void | |
711 | ovsdb_monitor_table_condition_updated(struct ovsdb_monitor_table *mt, | |
712 | struct ovsdb_monitor_session_condition *condition) | |
713 | { | |
714 | struct ovsdb_monitor_table_condition *mtc = | |
715 | shash_find_data(&condition->tables, mt->table->schema->name); | |
716 | ||
717 | if (mtc) { | |
718 | /* If conditional monitoring - set old condition to new condition */ | |
719 | if (ovsdb_condition_cmp_3way(&mtc->old_condition, | |
720 | &mtc->new_condition)) { | |
845a1187 LS |
721 | ovsdb_condition_destroy(&mtc->old_condition); |
722 | ovsdb_condition_clone(&mtc->old_condition, &mtc->new_condition); | |
723 | ovsdb_monitor_session_condition_set_mode(condition); | |
724 | } | |
725 | } | |
726 | } | |
727 | ||
71cdf7cd LS |
728 | static enum ovsdb_monitor_selection |
729 | ovsdb_monitor_row_update_type_condition( | |
730 | const struct ovsdb_monitor_table *mt, | |
731 | const struct ovsdb_monitor_session_condition *condition, | |
732 | bool initial, | |
845a1187 | 733 | enum ovsdb_monitor_row_type row_type, |
71cdf7cd LS |
734 | const struct ovsdb_datum *old, |
735 | const struct ovsdb_datum *new) | |
736 | { | |
737 | struct ovsdb_condition *old_condition, *new_condition; | |
738 | enum ovsdb_monitor_selection type = | |
739 | ovsdb_monitor_row_update_type(initial, old, new); | |
740 | ||
741 | if (ovsdb_monitor_get_table_conditions(mt, | |
742 | condition, | |
743 | &old_condition, | |
744 | &new_condition)) { | |
745 | bool old_cond = !old ? false | |
746 | : ovsdb_condition_empty_or_match_any(old, | |
845a1187 LS |
747 | old_condition, |
748 | row_type == OVSDB_MONITOR_ROW ? | |
749 | mt->columns_index_map : | |
750 | NULL); | |
71cdf7cd LS |
751 | bool new_cond = !new ? false |
752 | : ovsdb_condition_empty_or_match_any(new, | |
845a1187 LS |
753 | new_condition, |
754 | row_type == OVSDB_MONITOR_ROW ? | |
755 | mt->columns_index_map : | |
756 | NULL); | |
71cdf7cd LS |
757 | |
758 | if (!old_cond && !new_cond) { | |
759 | type = OJMS_NONE; | |
760 | } | |
761 | ||
762 | switch (type) { | |
763 | case OJMS_INITIAL: | |
764 | case OJMS_INSERT: | |
765 | if (!new_cond) { | |
766 | type = OJMS_NONE; | |
767 | } | |
768 | break; | |
769 | case OJMS_MODIFY: | |
770 | type = !old_cond ? OJMS_INSERT : !new_cond | |
771 | ? OJMS_DELETE : OJMS_MODIFY; | |
772 | break; | |
773 | case OJMS_DELETE: | |
774 | if (!old_cond) { | |
775 | type = OJMS_NONE; | |
776 | } | |
777 | break; | |
778 | case OJMS_NONE: | |
779 | break; | |
780 | } | |
781 | } | |
782 | return type; | |
783 | } | |
784 | ||
52553aea AZ |
785 | static bool |
786 | ovsdb_monitor_row_skip_update(const struct ovsdb_monitor_table *mt, | |
845a1187 LS |
787 | enum ovsdb_monitor_row_type row_type, |
788 | const struct ovsdb_datum *old, | |
789 | const struct ovsdb_datum *new, | |
52553aea AZ |
790 | enum ovsdb_monitor_selection type, |
791 | unsigned long int *changed) | |
792 | { | |
793 | if (!(mt->select & type)) { | |
794 | return true; | |
795 | } | |
796 | ||
797 | if (type == OJMS_MODIFY) { | |
798 | size_t i, n_changes; | |
799 | ||
800 | n_changes = 0; | |
801 | memset(changed, 0, bitmap_n_bytes(mt->n_columns)); | |
802 | for (i = 0; i < mt->n_columns; i++) { | |
803 | const struct ovsdb_column *c = mt->columns[i].column; | |
845a1187 LS |
804 | size_t index = row_type == OVSDB_ROW ? c->index : i; |
805 | if (!ovsdb_datum_equals(&old[index], &new[index], &c->type)) { | |
52553aea AZ |
806 | bitmap_set1(changed, i); |
807 | n_changes++; | |
808 | } | |
809 | } | |
810 | if (!n_changes) { | |
811 | /* No actual changes: presumably a row changed and then | |
812 | * changed back later. */ | |
813 | return true; | |
814 | } | |
815 | } | |
816 | ||
817 | return false; | |
818 | } | |
23cbedb7 | 819 | |
2fa1df7b AZ |
820 | /* Returns JSON for a <row-update> (as described in RFC 7047) for 'row' within |
821 | * 'mt', or NULL if no row update should be sent. | |
822 | * | |
823 | * The caller should specify 'initial' as true if the returned JSON is going to | |
824 | * be used as part of the initial reply to a "monitor" request, false if it is | |
825 | * going to be used as part of an "update" notification. | |
826 | * | |
827 | * 'changed' must be a scratch buffer for internal use that is at least | |
828 | * bitmap_n_bytes(mt->n_columns) bytes long. */ | |
829 | static struct json * | |
830 | ovsdb_monitor_compose_row_update( | |
831 | const struct ovsdb_monitor_table *mt, | |
71cdf7cd | 832 | const struct ovsdb_monitor_session_condition *condition OVS_UNUSED, |
845a1187 LS |
833 | enum ovsdb_monitor_row_type row_type OVS_UNUSED, |
834 | const void *_row, | |
2fa1df7b AZ |
835 | bool initial, unsigned long int *changed) |
836 | { | |
845a1187 | 837 | const struct ovsdb_monitor_row *row = _row; |
2fa1df7b AZ |
838 | enum ovsdb_monitor_selection type; |
839 | struct json *old_json, *new_json; | |
840 | struct json *row_json; | |
841 | size_t i; | |
842 | ||
845a1187 | 843 | ovs_assert(row_type == OVSDB_MONITOR_ROW); |
23cbedb7 | 844 | type = ovsdb_monitor_row_update_type(initial, row->old, row->new); |
845a1187 LS |
845 | if (ovsdb_monitor_row_skip_update(mt, row_type, row->old, |
846 | row->new, type, changed)) { | |
2fa1df7b AZ |
847 | return NULL; |
848 | } | |
849 | ||
2fa1df7b AZ |
850 | row_json = json_object_create(); |
851 | old_json = new_json = NULL; | |
852 | if (type & (OJMS_DELETE | OJMS_MODIFY)) { | |
853 | old_json = json_object_create(); | |
854 | json_object_put(row_json, "old", old_json); | |
855 | } | |
856 | if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) { | |
857 | new_json = json_object_create(); | |
858 | json_object_put(row_json, "new", new_json); | |
859 | } | |
6150a75f | 860 | for (i = 0; i < mt->n_monitored_columns; i++) { |
2fa1df7b AZ |
861 | const struct ovsdb_monitor_column *c = &mt->columns[i]; |
862 | ||
6150a75f | 863 | if (!c->monitored || !(type & c->select)) { |
2fa1df7b AZ |
864 | /* We don't care about this type of change for this |
865 | * particular column (but we will care about it for some | |
866 | * other column). */ | |
867 | continue; | |
868 | } | |
869 | ||
870 | if ((type == OJMS_MODIFY && bitmap_is_set(changed, i)) | |
871 | || type == OJMS_DELETE) { | |
872 | json_object_put(old_json, c->column->name, | |
873 | ovsdb_datum_to_json(&row->old[i], | |
874 | &c->column->type)); | |
875 | } | |
876 | if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) { | |
877 | json_object_put(new_json, c->column->name, | |
878 | ovsdb_datum_to_json(&row->new[i], | |
879 | &c->column->type)); | |
880 | } | |
881 | } | |
882 | ||
883 | return row_json; | |
884 | } | |
885 | ||
52553aea AZ |
886 | /* Returns JSON for a <row-update2> (as described in ovsdb-server(1) mapage) |
887 | * for 'row' within * 'mt', or NULL if no row update should be sent. | |
888 | * | |
889 | * The caller should specify 'initial' as true if the returned JSON is | |
845a1187 | 890 | * going to be used as part of the initial reply to a "monitor_cond" request, |
52553aea AZ |
891 | * false if it is going to be used as part of an "update2" notification. |
892 | * | |
893 | * 'changed' must be a scratch buffer for internal use that is at least | |
894 | * bitmap_n_bytes(mt->n_columns) bytes long. */ | |
895 | static struct json * | |
896 | ovsdb_monitor_compose_row_update2( | |
897 | const struct ovsdb_monitor_table *mt, | |
71cdf7cd | 898 | const struct ovsdb_monitor_session_condition *condition, |
845a1187 LS |
899 | enum ovsdb_monitor_row_type row_type, |
900 | const void *_row, | |
52553aea AZ |
901 | bool initial, unsigned long int *changed) |
902 | { | |
903 | enum ovsdb_monitor_selection type; | |
904 | struct json *row_update2, *diff_json; | |
845a1187 | 905 | const struct ovsdb_datum *old, *new; |
52553aea AZ |
906 | size_t i; |
907 | ||
845a1187 LS |
908 | if (row_type == OVSDB_MONITOR_ROW) { |
909 | old = ((const struct ovsdb_monitor_row *)_row)->old;; | |
910 | new = ((const struct ovsdb_monitor_row *)_row)->new; | |
911 | } else { | |
912 | old = new = ((const struct ovsdb_row *)_row)->fields; | |
913 | } | |
914 | ||
71cdf7cd | 915 | type = ovsdb_monitor_row_update_type_condition(mt, condition, initial, |
845a1187 LS |
916 | row_type, old, new); |
917 | if (ovsdb_monitor_row_skip_update(mt, row_type, old, new, type, changed)) { | |
52553aea AZ |
918 | return NULL; |
919 | } | |
920 | ||
921 | row_update2 = json_object_create(); | |
922 | if (type == OJMS_DELETE) { | |
923 | json_object_put(row_update2, "delete", json_null_create()); | |
924 | } else { | |
925 | diff_json = json_object_create(); | |
926 | const char *op; | |
927 | ||
6150a75f | 928 | for (i = 0; i < mt->n_monitored_columns; i++) { |
52553aea | 929 | const struct ovsdb_monitor_column *c = &mt->columns[i]; |
845a1187 | 930 | size_t index = row_type == OVSDB_ROW ? c->column->index : i; |
6150a75f | 931 | if (!c->monitored || !(type & c->select)) { |
52553aea AZ |
932 | /* We don't care about this type of change for this |
933 | * particular column (but we will care about it for some | |
934 | * other column). */ | |
935 | continue; | |
936 | } | |
937 | ||
938 | if (type == OJMS_MODIFY) { | |
939 | struct ovsdb_datum diff; | |
940 | ||
941 | if (!bitmap_is_set(changed, i)) { | |
942 | continue; | |
943 | } | |
944 | ||
845a1187 | 945 | ovsdb_datum_diff(&diff ,&old[index], &new[index], |
52553aea AZ |
946 | &c->column->type); |
947 | json_object_put(diff_json, c->column->name, | |
948 | ovsdb_datum_to_json(&diff, &c->column->type)); | |
949 | ovsdb_datum_destroy(&diff, &c->column->type); | |
950 | } else { | |
845a1187 | 951 | if (!ovsdb_datum_is_default(&new[index], &c->column->type)) { |
52553aea | 952 | json_object_put(diff_json, c->column->name, |
845a1187 | 953 | ovsdb_datum_to_json(&new[index], |
52553aea AZ |
954 | &c->column->type)); |
955 | } | |
956 | } | |
957 | } | |
958 | ||
959 | op = type == OJMS_INITIAL ? "initial" | |
960 | : type == OJMS_MODIFY ? "modify" : "insert"; | |
961 | json_object_put(row_update2, op, diff_json); | |
962 | } | |
963 | ||
964 | return row_update2; | |
965 | } | |
966 | ||
6cef8e87 AZ |
967 | static size_t |
968 | ovsdb_monitor_max_columns(struct ovsdb_monitor *dbmon) | |
969 | { | |
970 | struct shash_node *node; | |
971 | size_t max_columns = 0; | |
972 | ||
973 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
974 | struct ovsdb_monitor_table *mt = node->data; | |
975 | ||
976 | max_columns = MAX(max_columns, mt->n_columns); | |
977 | } | |
978 | ||
979 | return max_columns; | |
980 | } | |
981 | ||
845a1187 LS |
982 | static void |
983 | ovsdb_monitor_add_json_row(struct json **json, const char *table_name, | |
984 | struct json **table_json, struct json *row_json, | |
985 | const struct uuid *row_uuid) | |
986 | { | |
987 | char uuid[UUID_LEN + 1]; | |
988 | ||
989 | /* Create JSON object for transaction overall. */ | |
990 | if (!*json) { | |
991 | *json = json_object_create(); | |
992 | } | |
993 | ||
994 | /* Create JSON object for transaction on this table. */ | |
995 | if (!*table_json) { | |
996 | *table_json = json_object_create(); | |
997 | json_object_put(*json, table_name, *table_json); | |
998 | } | |
999 | ||
1000 | /* Add JSON row to JSON table. */ | |
1001 | snprintf(uuid, sizeof uuid, UUID_FMT, UUID_ARGS(row_uuid)); | |
1002 | json_object_put(*table_json, uuid, row_json); | |
1003 | } | |
1004 | ||
2fa1df7b | 1005 | /* Constructs and returns JSON for a <table-updates> object (as described in |
4c280978 AZ |
1006 | * RFC 7047) for all the outstanding changes within 'monitor', starting from |
1007 | * 'transaction'. */ | |
1008 | static struct json* | |
71cdf7cd LS |
1009 | ovsdb_monitor_compose_update( |
1010 | struct ovsdb_monitor *dbmon, | |
1011 | bool initial, uint64_t transaction, | |
1012 | const struct ovsdb_monitor_session_condition *condition, | |
1013 | compose_row_update_cb_func row_update) | |
2fa1df7b AZ |
1014 | { |
1015 | struct shash_node *node; | |
2fa1df7b | 1016 | struct json *json; |
6cef8e87 AZ |
1017 | size_t max_columns = ovsdb_monitor_max_columns(dbmon); |
1018 | unsigned long int *changed = xmalloc(bitmap_n_bytes(max_columns)); | |
2fa1df7b AZ |
1019 | |
1020 | json = NULL; | |
1021 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1022 | struct ovsdb_monitor_table *mt = node->data; | |
1023 | struct ovsdb_monitor_row *row, *next; | |
7e911055 | 1024 | struct ovsdb_monitor_changes *changes; |
2fa1df7b AZ |
1025 | struct json *table_json = NULL; |
1026 | ||
4c280978 | 1027 | changes = ovsdb_monitor_table_find_changes(mt, transaction); |
7e911055 | 1028 | if (!changes) { |
1158f320 AZ |
1029 | continue; |
1030 | } | |
1031 | ||
70ec021a AS |
1032 | HMAP_FOR_EACH_SAFE (row, next, hmap_node, &changes->rows) { |
1033 | struct json *row_json; | |
1034 | row_json = (*row_update)(mt, condition, OVSDB_MONITOR_ROW, row, | |
1035 | initial, changed); | |
1036 | if (row_json) { | |
1037 | ovsdb_monitor_add_json_row(&json, mt->table->schema->name, | |
1038 | &table_json, row_json, | |
1039 | &row->uuid); | |
1040 | } | |
1041 | } | |
1042 | } | |
845a1187 | 1043 | free(changed); |
2fa1df7b | 1044 | |
845a1187 LS |
1045 | return json; |
1046 | } | |
2fa1df7b | 1047 | |
845a1187 LS |
1048 | static struct json* |
1049 | ovsdb_monitor_compose_cond_change_update( | |
1050 | struct ovsdb_monitor *dbmon, | |
1051 | struct ovsdb_monitor_session_condition *condition) | |
1052 | { | |
1053 | struct shash_node *node; | |
1054 | struct json *json = NULL; | |
1055 | size_t max_columns = ovsdb_monitor_max_columns(dbmon); | |
1056 | unsigned long int *changed = xmalloc(bitmap_n_bytes(max_columns)); | |
2fa1df7b | 1057 | |
845a1187 LS |
1058 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1059 | struct ovsdb_monitor_table *mt = node->data; | |
1060 | struct ovsdb_row *row; | |
1061 | struct json *table_json = NULL; | |
1062 | struct ovsdb_condition *old_condition, *new_condition; | |
1063 | ||
1064 | if (!ovsdb_monitor_get_table_conditions(mt, | |
1065 | condition, | |
1066 | &old_condition, | |
1067 | &new_condition) || | |
1068 | !ovsdb_condition_cmp_3way(old_condition, new_condition)) { | |
1069 | /* Nothing to update on this table */ | |
1070 | continue; | |
1071 | } | |
2fa1df7b | 1072 | |
845a1187 LS |
1073 | /* Iterate over all rows in table */ |
1074 | HMAP_FOR_EACH (row, hmap_node, &mt->table->rows) { | |
1075 | struct json *row_json; | |
1076 | ||
1077 | row_json = ovsdb_monitor_compose_row_update2(mt, condition, | |
1078 | OVSDB_ROW, row, | |
1079 | false, changed); | |
1080 | if (row_json) { | |
1081 | ovsdb_monitor_add_json_row(&json, mt->table->schema->name, | |
1082 | &table_json, row_json, | |
1083 | ovsdb_row_get_uuid(row)); | |
2fa1df7b | 1084 | } |
2fa1df7b | 1085 | } |
845a1187 | 1086 | ovsdb_monitor_table_condition_updated(mt, condition); |
4c280978 AZ |
1087 | } |
1088 | free(changed); | |
1089 | ||
1090 | return json; | |
1091 | } | |
1092 | ||
1093 | /* Returns JSON for a <table-updates> object (as described in RFC 7047) | |
1094 | * for all the outstanding changes within 'monitor' that starts from | |
845a1187 LS |
1095 | * '*unflushed'. |
1096 | * If cond_updated is true all rows in the db that match conditions will be | |
1097 | * sent. | |
4c280978 AZ |
1098 | * |
1099 | * The caller should specify 'initial' as true if the returned JSON is going to | |
1100 | * be used as part of the initial reply to a "monitor" request, false if it is | |
1101 | * going to be used as part of an "update" notification. */ | |
1102 | struct json * | |
71cdf7cd LS |
1103 | ovsdb_monitor_get_update( |
1104 | struct ovsdb_monitor *dbmon, | |
845a1187 LS |
1105 | bool initial, bool cond_updated, |
1106 | uint64_t *unflushed_, | |
1107 | struct ovsdb_monitor_session_condition *condition, | |
71cdf7cd | 1108 | enum ovsdb_monitor_version version) |
4c280978 | 1109 | { |
71cdf7cd | 1110 | struct ovsdb_monitor_json_cache_node *cache_node = NULL; |
4c280978 AZ |
1111 | struct shash_node *node; |
1112 | struct json *json; | |
765b5a0e AZ |
1113 | const uint64_t unflushed = *unflushed_; |
1114 | const uint64_t next_unflushed = dbmon->n_transactions + 1; | |
4c280978 | 1115 | |
845a1187 LS |
1116 | ovs_assert(cond_updated ? unflushed == next_unflushed : true); |
1117 | ||
4c280978 AZ |
1118 | /* Return a clone of cached json if one exists. Otherwise, |
1119 | * generate a new one and add it to the cache. */ | |
845a1187 | 1120 | if (!condition || (!condition->conditional && !cond_updated)) { |
71cdf7cd LS |
1121 | cache_node = ovsdb_monitor_json_cache_search(dbmon, version, |
1122 | unflushed); | |
1123 | } | |
4c280978 AZ |
1124 | if (cache_node) { |
1125 | json = cache_node->json ? json_clone(cache_node->json) : NULL; | |
1126 | } else { | |
52553aea | 1127 | if (version == OVSDB_MONITOR_V1) { |
71cdf7cd LS |
1128 | json = |
1129 | ovsdb_monitor_compose_update(dbmon, initial, unflushed, | |
1130 | condition, | |
1131 | ovsdb_monitor_compose_row_update); | |
52553aea AZ |
1132 | } else { |
1133 | ovs_assert(version == OVSDB_MONITOR_V2); | |
845a1187 | 1134 | if (!cond_updated) { |
70ec021a AS |
1135 | json = ovsdb_monitor_compose_update(dbmon, initial, unflushed, |
1136 | condition, | |
1137 | ovsdb_monitor_compose_row_update2); | |
1138 | ||
1139 | if (!condition || !condition->conditional) { | |
1140 | ovsdb_monitor_json_cache_insert(dbmon, version, unflushed, | |
1141 | json); | |
1142 | } | |
1143 | } else { | |
845a1187 LS |
1144 | /* Compose update on whole db due to condition update. |
1145 | Session must be flushed (change list is empty)*/ | |
70ec021a AS |
1146 | json = |
1147 | ovsdb_monitor_compose_cond_change_update(dbmon, condition); | |
1148 | } | |
1149 | } | |
4c280978 AZ |
1150 | } |
1151 | ||
1152 | /* Maintain transaction id of 'changes'. */ | |
1153 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1154 | struct ovsdb_monitor_table *mt = node->data; | |
1158f320 | 1155 | |
765b5a0e AZ |
1156 | ovsdb_monitor_table_untrack_changes(mt, unflushed); |
1157 | ovsdb_monitor_table_track_changes(mt, next_unflushed); | |
2fa1df7b | 1158 | } |
765b5a0e | 1159 | *unflushed_ = next_unflushed; |
4c280978 | 1160 | |
2fa1df7b AZ |
1161 | return json; |
1162 | } | |
1163 | ||
1164 | bool | |
59c35e11 AZ |
1165 | ovsdb_monitor_needs_flush(struct ovsdb_monitor *dbmon, |
1166 | uint64_t next_transaction) | |
2fa1df7b | 1167 | { |
59c35e11 AZ |
1168 | ovs_assert(next_transaction <= dbmon->n_transactions + 1); |
1169 | return (next_transaction <= dbmon->n_transactions); | |
2fa1df7b AZ |
1170 | } |
1171 | ||
1172 | void | |
1173 | ovsdb_monitor_table_add_select(struct ovsdb_monitor *dbmon, | |
1174 | const struct ovsdb_table *table, | |
1175 | enum ovsdb_monitor_selection select) | |
1176 | { | |
1177 | struct ovsdb_monitor_table * mt; | |
1178 | ||
1179 | mt = shash_find_data(&dbmon->tables, table->schema->name); | |
1180 | mt->select |= select; | |
1181 | } | |
1182 | ||
58de87cc AZ |
1183 | /* |
1184 | * If a row's change type (insert, delete or modify) matches that of | |
1185 | * the monitor, they should be sent to the monitor's clients as updates. | |
1186 | * Of cause, the monitor should also internally update with this change. | |
1187 | * | |
1188 | * When a change type does not require client side update, the monitor | |
1189 | * may still need to keep track of certain changes in order to generate | |
1190 | * correct future updates. For example, the monitor internal state should | |
1191 | * be updated whenever a new row is inserted, in order to generate the | |
1192 | * correct initial state, regardless if a insert change type is being | |
1193 | * monitored. | |
1194 | * | |
1195 | * On the other hand, if a transaction only contains changes to columns | |
1196 | * that are not monitored, this transaction can be safely ignored by the | |
1197 | * monitor. | |
1198 | * | |
1199 | * Thus, the order of the declaration is important: | |
1200 | * 'OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE' always implies | |
1201 | * 'OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE', but not vice versa. */ | |
1202 | enum ovsdb_monitor_changes_efficacy { | |
1203 | OVSDB_CHANGES_NO_EFFECT, /* Monitor does not care about this | |
1204 | change. */ | |
1205 | OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE, /* Monitor internal updates. */ | |
1206 | OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE, /* Client needs to be updated. */ | |
1207 | }; | |
1208 | ||
2fa1df7b AZ |
1209 | struct ovsdb_monitor_aux { |
1210 | const struct ovsdb_monitor *monitor; | |
1211 | struct ovsdb_monitor_table *mt; | |
a0cba5c2 | 1212 | enum ovsdb_monitor_changes_efficacy efficacy; |
2fa1df7b AZ |
1213 | }; |
1214 | ||
1215 | static void | |
1216 | ovsdb_monitor_init_aux(struct ovsdb_monitor_aux *aux, | |
1217 | const struct ovsdb_monitor *m) | |
1218 | { | |
1219 | aux->monitor = m; | |
1220 | aux->mt = NULL; | |
a0cba5c2 | 1221 | aux->efficacy = OVSDB_CHANGES_NO_EFFECT; |
2fa1df7b AZ |
1222 | } |
1223 | ||
7e911055 AZ |
1224 | static void |
1225 | ovsdb_monitor_changes_update(const struct ovsdb_row *old, | |
1226 | const struct ovsdb_row *new, | |
1227 | const struct ovsdb_monitor_table *mt, | |
1228 | struct ovsdb_monitor_changes *changes) | |
2fa1df7b | 1229 | { |
2fa1df7b AZ |
1230 | const struct uuid *uuid = ovsdb_row_get_uuid(new ? new : old); |
1231 | struct ovsdb_monitor_row *change; | |
2fa1df7b | 1232 | |
7e911055 | 1233 | change = ovsdb_monitor_changes_row_find(changes, uuid); |
2fa1df7b | 1234 | if (!change) { |
1158f320 | 1235 | change = xzalloc(sizeof *change); |
7e911055 | 1236 | hmap_insert(&changes->rows, &change->hmap_node, uuid_hash(uuid)); |
2fa1df7b AZ |
1237 | change->uuid = *uuid; |
1238 | change->old = clone_monitor_row_data(mt, old); | |
1239 | change->new = clone_monitor_row_data(mt, new); | |
1240 | } else { | |
1241 | if (new) { | |
20853442 AZ |
1242 | if (!change->new) { |
1243 | /* Reinsert the row that was just deleted. | |
1244 | * | |
1245 | * This path won't be hit without replication. Whenever OVSDB | |
1246 | * server inserts a new row, It always generates a new UUID | |
1247 | * that is different from the row just deleted. | |
1248 | * | |
1249 | * With replication, this path can be hit in a corner | |
1250 | * case when two OVSDB servers are set up to replicate | |
1251 | * each other. Not that is a useful set up, but can | |
1252 | * happen in practice. | |
1253 | * | |
1254 | * An example of how this path can be hit is documented below. | |
1255 | * The details is not as important to the correctness of the | |
1256 | * logic, but added here to convince ourselves that this path | |
1257 | * can be hit. | |
1258 | * | |
1259 | * Imagine two OVSDB servers that replicates from each | |
1260 | * other. For each replication session, there is a | |
1261 | * corresponding monitor at the other end of the replication | |
1262 | * JSONRPC connection. | |
1263 | * | |
1264 | * The events can lead to a back to back deletion and | |
1265 | * insertion operation of the same row for the monitor of | |
1266 | * the first server are: | |
1267 | * | |
1268 | * 1. A row is inserted in the first OVSDB server. | |
1269 | * 2. The row is then replicated to the remote OVSDB server. | |
1270 | * 3. The row is now deleted by the local OVSDB server. This | |
1271 | * deletion operation is replicated to the local monitor | |
1272 | * of the OVSDB server. | |
1273 | * 4. The monitor now receives the same row, as an insertion, | |
1274 | * from the replication server. Because of | |
1275 | * replication, the row carries the same UUID as the row | |
1276 | * just deleted. | |
1277 | */ | |
1278 | change->new = clone_monitor_row_data(mt, new); | |
1279 | } else { | |
1280 | update_monitor_row_data(mt, new, change->new); | |
1281 | } | |
2fa1df7b AZ |
1282 | } else { |
1283 | free_monitor_row_data(mt, change->new); | |
1284 | change->new = NULL; | |
1285 | ||
1286 | if (!change->old) { | |
1287 | /* This row was added then deleted. Forget about it. */ | |
7e911055 | 1288 | hmap_remove(&changes->rows, &change->hmap_node); |
2fa1df7b AZ |
1289 | free(change); |
1290 | } | |
1291 | } | |
1292 | } | |
7e911055 AZ |
1293 | } |
1294 | ||
58de87cc AZ |
1295 | static bool |
1296 | ovsdb_monitor_columns_changed(const struct ovsdb_monitor_table *mt, | |
1297 | const unsigned long int *changed) | |
1298 | { | |
1299 | size_t i; | |
1300 | ||
1301 | for (i = 0; i < mt->n_columns; i++) { | |
1302 | size_t column_index = mt->columns[i].column->index; | |
1303 | ||
1304 | if (bitmap_is_set(changed, column_index)) { | |
1305 | return true; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | return false; | |
1310 | } | |
1311 | ||
1312 | /* Return the efficacy of a row's change to a monitor table. | |
1313 | * | |
1314 | * Please see the block comment above 'ovsdb_monitor_changes_efficacy' | |
1315 | * definition form more information. */ | |
1316 | static enum ovsdb_monitor_changes_efficacy | |
1317 | ovsdb_monitor_changes_classify(enum ovsdb_monitor_selection type, | |
1318 | const struct ovsdb_monitor_table *mt, | |
1319 | const unsigned long int *changed) | |
1320 | { | |
1321 | if (type == OJMS_MODIFY && | |
1322 | !ovsdb_monitor_columns_changed(mt, changed)) { | |
1323 | return OVSDB_CHANGES_NO_EFFECT; | |
1324 | } | |
1325 | ||
71cdf7cd LS |
1326 | if (type == OJMS_MODIFY) { |
1327 | /* Condition might turn a modify operation to insert or delete */ | |
1328 | type |= OJMS_INSERT | OJMS_DELETE; | |
1329 | } | |
1330 | ||
58de87cc AZ |
1331 | return (mt->select & type) |
1332 | ? OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE | |
1333 | : OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE; | |
1334 | } | |
1335 | ||
7e911055 AZ |
1336 | static bool |
1337 | ovsdb_monitor_change_cb(const struct ovsdb_row *old, | |
1338 | const struct ovsdb_row *new, | |
3a22387b | 1339 | const unsigned long int *changed, |
7e911055 AZ |
1340 | void *aux_) |
1341 | { | |
1342 | struct ovsdb_monitor_aux *aux = aux_; | |
1343 | const struct ovsdb_monitor *m = aux->monitor; | |
1344 | struct ovsdb_table *table = new ? new->table : old->table; | |
1345 | struct ovsdb_monitor_table *mt; | |
1346 | struct ovsdb_monitor_changes *changes; | |
1347 | ||
1348 | if (!aux->mt || table != aux->mt->table) { | |
1349 | aux->mt = shash_find_data(&m->tables, table->schema->name); | |
1350 | if (!aux->mt) { | |
1351 | /* We don't care about rows in this table at all. Tell the caller | |
1352 | * to skip it. */ | |
1353 | return false; | |
1354 | } | |
1355 | } | |
1356 | mt = aux->mt; | |
1357 | ||
71cdf7cd LS |
1358 | enum ovsdb_monitor_selection type = |
1359 | ovsdb_monitor_row_update_type(false, old, new); | |
1360 | enum ovsdb_monitor_changes_efficacy efficacy = | |
1361 | ovsdb_monitor_changes_classify(type, mt, changed); | |
58de87cc | 1362 | |
71cdf7cd | 1363 | HMAP_FOR_EACH(changes, hmap_node, &mt->changes) { |
58de87cc AZ |
1364 | if (efficacy > OVSDB_CHANGES_NO_EFFECT) { |
1365 | ovsdb_monitor_changes_update(old, new, mt, changes); | |
1366 | } | |
71cdf7cd LS |
1367 | } |
1368 | if (aux->efficacy < efficacy) { | |
1369 | aux->efficacy = efficacy; | |
7e911055 | 1370 | } |
58de87cc | 1371 | |
2fa1df7b AZ |
1372 | return true; |
1373 | } | |
1374 | ||
61b63013 | 1375 | void |
2fa1df7b AZ |
1376 | ovsdb_monitor_get_initial(const struct ovsdb_monitor *dbmon) |
1377 | { | |
2fa1df7b | 1378 | struct shash_node *node; |
2fa1df7b | 1379 | |
2fa1df7b AZ |
1380 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1381 | struct ovsdb_monitor_table *mt = node->data; | |
1382 | ||
1383 | if (mt->select & OJMS_INITIAL) { | |
1384 | struct ovsdb_row *row; | |
6e5a9216 | 1385 | struct ovsdb_monitor_changes *changes; |
2fa1df7b | 1386 | |
6e5a9216 AZ |
1387 | changes = ovsdb_monitor_table_find_changes(mt, 0); |
1388 | if (!changes) { | |
1389 | changes = ovsdb_monitor_table_add_changes(mt, 0); | |
1390 | HMAP_FOR_EACH (row, hmap_node, &mt->table->rows) { | |
1391 | ovsdb_monitor_changes_update(NULL, row, mt, changes); | |
1392 | } | |
1393 | } else { | |
1394 | changes->n_refs++; | |
2fa1df7b AZ |
1395 | } |
1396 | } | |
1397 | } | |
2fa1df7b AZ |
1398 | } |
1399 | ||
1400 | void | |
d9412837 | 1401 | ovsdb_monitor_remove_jsonrpc_monitor(struct ovsdb_monitor *dbmon, |
f76def25 AZ |
1402 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor, |
1403 | uint64_t unflushed) | |
d9412837 AZ |
1404 | { |
1405 | struct jsonrpc_monitor_node *jm; | |
1406 | ||
417e7e66 | 1407 | if (ovs_list_is_empty(&dbmon->jsonrpc_monitors)) { |
6e5a9216 AZ |
1408 | ovsdb_monitor_destroy(dbmon); |
1409 | return; | |
1410 | } | |
1411 | ||
d9412837 AZ |
1412 | /* Find and remove the jsonrpc monitor from the list. */ |
1413 | LIST_FOR_EACH(jm, node, &dbmon->jsonrpc_monitors) { | |
1414 | if (jm->jsonrpc_monitor == jsonrpc_monitor) { | |
f76def25 AZ |
1415 | /* Release the tracked changes. */ |
1416 | struct shash_node *node; | |
1417 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1418 | struct ovsdb_monitor_table *mt = node->data; | |
1419 | ovsdb_monitor_table_untrack_changes(mt, unflushed); | |
1420 | } | |
417e7e66 | 1421 | ovs_list_remove(&jm->node); |
d9412837 AZ |
1422 | free(jm); |
1423 | ||
1424 | /* Destroy ovsdb monitor if this is the last user. */ | |
417e7e66 | 1425 | if (ovs_list_is_empty(&dbmon->jsonrpc_monitors)) { |
d9412837 AZ |
1426 | ovsdb_monitor_destroy(dbmon); |
1427 | } | |
1428 | ||
1429 | return; | |
1430 | }; | |
1431 | } | |
1432 | ||
1433 | /* Should never reach here. jsonrpc_monitor should be on the list. */ | |
1434 | OVS_NOT_REACHED(); | |
1435 | } | |
1436 | ||
6e5a9216 AZ |
1437 | static bool |
1438 | ovsdb_monitor_table_equal(const struct ovsdb_monitor_table *a, | |
1439 | const struct ovsdb_monitor_table *b) | |
1440 | { | |
1441 | size_t i; | |
1442 | ||
6150a75f LS |
1443 | ovs_assert(b->n_columns == b->n_monitored_columns); |
1444 | ||
6e5a9216 AZ |
1445 | if ((a->table != b->table) || |
1446 | (a->select != b->select) || | |
6150a75f | 1447 | (a->n_monitored_columns != b->n_monitored_columns)) { |
6e5a9216 AZ |
1448 | return false; |
1449 | } | |
1450 | ||
6150a75f LS |
1451 | /* Compare only monitored columns that must be sorted already */ |
1452 | for (i = 0; i < a->n_monitored_columns; i++) { | |
6e5a9216 AZ |
1453 | if ((a->columns[i].column != b->columns[i].column) || |
1454 | (a->columns[i].select != b->columns[i].select)) { | |
1455 | return false; | |
1456 | } | |
1457 | } | |
6e5a9216 AZ |
1458 | return true; |
1459 | } | |
1460 | ||
1461 | static bool | |
1462 | ovsdb_monitor_equal(const struct ovsdb_monitor *a, | |
1463 | const struct ovsdb_monitor *b) | |
1464 | { | |
1465 | struct shash_node *node; | |
1466 | ||
1467 | if (shash_count(&a->tables) != shash_count(&b->tables)) { | |
1468 | return false; | |
1469 | } | |
1470 | ||
1471 | SHASH_FOR_EACH(node, &a->tables) { | |
1472 | const struct ovsdb_monitor_table *mta = node->data; | |
1473 | const struct ovsdb_monitor_table *mtb; | |
1474 | ||
1475 | mtb = shash_find_data(&b->tables, node->name); | |
1476 | if (!mtb) { | |
1477 | return false; | |
1478 | } | |
1479 | ||
1480 | if (!ovsdb_monitor_table_equal(mta, mtb)) { | |
1481 | return false; | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | return true; | |
1486 | } | |
1487 | ||
1488 | static size_t | |
1489 | ovsdb_monitor_hash(const struct ovsdb_monitor *dbmon, size_t basis) | |
1490 | { | |
1491 | const struct shash_node **nodes; | |
1492 | size_t i, j, n; | |
1493 | ||
1494 | nodes = shash_sort(&dbmon->tables); | |
1495 | n = shash_count(&dbmon->tables); | |
1496 | ||
1497 | for (i = 0; i < n; i++) { | |
1498 | struct ovsdb_monitor_table *mt = nodes[i]->data; | |
1499 | ||
1500 | basis = hash_pointer(mt->table, basis); | |
1501 | basis = hash_3words(mt->select, mt->n_columns, basis); | |
1502 | ||
1503 | for (j = 0; j < mt->n_columns; j++) { | |
1504 | basis = hash_pointer(mt->columns[j].column, basis); | |
1505 | basis = hash_2words(mt->columns[j].select, basis); | |
1506 | } | |
1507 | } | |
1508 | free(nodes); | |
1509 | ||
1510 | return basis; | |
1511 | } | |
1512 | ||
1513 | struct ovsdb_monitor * | |
1514 | ovsdb_monitor_add(struct ovsdb_monitor *new_dbmon) | |
1515 | { | |
1516 | struct ovsdb_monitor *dbmon; | |
1517 | size_t hash; | |
1518 | ||
1519 | /* New_dbmon should be associated with only one jsonrpc | |
1520 | * connections. */ | |
417e7e66 | 1521 | ovs_assert(ovs_list_is_singleton(&new_dbmon->jsonrpc_monitors)); |
6e5a9216 | 1522 | |
ec1eadce LS |
1523 | ovsdb_monitor_columns_sort(new_dbmon); |
1524 | ||
6e5a9216 AZ |
1525 | hash = ovsdb_monitor_hash(new_dbmon, 0); |
1526 | HMAP_FOR_EACH_WITH_HASH(dbmon, hmap_node, hash, &ovsdb_monitors) { | |
1527 | if (ovsdb_monitor_equal(dbmon, new_dbmon)) { | |
1528 | return dbmon; | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | hmap_insert(&ovsdb_monitors, &new_dbmon->hmap_node, hash); | |
1533 | return new_dbmon; | |
1534 | } | |
1535 | ||
d9412837 | 1536 | static void |
2fa1df7b AZ |
1537 | ovsdb_monitor_destroy(struct ovsdb_monitor *dbmon) |
1538 | { | |
1539 | struct shash_node *node; | |
1540 | ||
009bf21f | 1541 | ovs_list_remove(&dbmon->list_node); |
2fa1df7b | 1542 | |
6e5a9216 AZ |
1543 | if (!hmap_node_is_null(&dbmon->hmap_node)) { |
1544 | hmap_remove(&ovsdb_monitors, &dbmon->hmap_node); | |
1545 | } | |
1546 | ||
4c280978 AZ |
1547 | ovsdb_monitor_json_cache_flush(dbmon); |
1548 | hmap_destroy(&dbmon->json_cache); | |
1549 | ||
2fa1df7b AZ |
1550 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1551 | struct ovsdb_monitor_table *mt = node->data; | |
7e911055 | 1552 | struct ovsdb_monitor_changes *changes, *next; |
2fa1df7b | 1553 | |
7e911055 AZ |
1554 | HMAP_FOR_EACH_SAFE (changes, next, hmap_node, &mt->changes) { |
1555 | hmap_remove(&mt->changes, &changes->hmap_node); | |
1556 | ovsdb_monitor_changes_destroy(changes); | |
1557 | } | |
a7ca2803 | 1558 | hmap_destroy(&mt->changes); |
2fa1df7b | 1559 | free(mt->columns); |
ec1eadce | 1560 | free(mt->columns_index_map); |
2fa1df7b AZ |
1561 | free(mt); |
1562 | } | |
1563 | shash_destroy(&dbmon->tables); | |
1564 | free(dbmon); | |
1565 | } | |
1566 | ||
120fb2ca | 1567 | static void |
009bf21f | 1568 | ovsdb_monitor_commit(struct ovsdb_monitor *m, const struct ovsdb_txn *txn) |
2fa1df7b | 1569 | { |
2fa1df7b AZ |
1570 | struct ovsdb_monitor_aux aux; |
1571 | ||
1572 | ovsdb_monitor_init_aux(&aux, m); | |
5e229177 AZ |
1573 | /* Update ovsdb_monitor's transaction number for |
1574 | * each transaction, before calling ovsdb_monitor_change_cb(). */ | |
1575 | m->n_transactions++; | |
2fa1df7b | 1576 | ovsdb_txn_for_each_change(txn, ovsdb_monitor_change_cb, &aux); |
a0cba5c2 | 1577 | |
5e229177 AZ |
1578 | switch(aux.efficacy) { |
1579 | case OVSDB_CHANGES_NO_EFFECT: | |
1580 | /* The transaction is ignored by the monitor. | |
1581 | * Roll back the 'n_transactions' as if the transaction | |
1582 | * has never happened. */ | |
1583 | m->n_transactions--; | |
1584 | break; | |
1585 | case OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE: | |
1586 | /* Nothing. */ | |
1587 | break; | |
1588 | case OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE: | |
a0cba5c2 | 1589 | ovsdb_monitor_json_cache_flush(m); |
5e229177 | 1590 | break; |
a0cba5c2 | 1591 | } |
2fa1df7b AZ |
1592 | } |
1593 | ||
009bf21f BP |
1594 | void |
1595 | ovsdb_monitors_commit(struct ovsdb *db, const struct ovsdb_txn *txn) | |
2fa1df7b | 1596 | { |
009bf21f | 1597 | struct ovsdb_monitor *m; |
2fa1df7b | 1598 | |
009bf21f BP |
1599 | LIST_FOR_EACH (m, list_node, &db->monitors) { |
1600 | ovsdb_monitor_commit(m, txn); | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | void | |
1605 | ovsdb_monitors_remove(struct ovsdb *db) | |
1606 | { | |
1607 | struct ovsdb_monitor *m, *next_m; | |
1608 | ||
1609 | LIST_FOR_EACH_SAFE (m, next_m, list_node, &db->monitors) { | |
1610 | struct jsonrpc_monitor_node *jm, *next_jm; | |
1611 | ||
1612 | /* Delete all front-end monitors. Removing the last front-end monitor | |
1613 | * will also destroy the corresponding ovsdb_monitor. */ | |
1614 | LIST_FOR_EACH_SAFE (jm, next_jm, node, &m->jsonrpc_monitors) { | |
53178986 | 1615 | ovsdb_jsonrpc_monitor_destroy(jm->jsonrpc_monitor, false); |
009bf21f | 1616 | } |
d9412837 | 1617 | } |
2fa1df7b AZ |
1618 | } |
1619 | ||
e0c73ed1 AZ |
1620 | /* Add some memory usage statics for monitors into 'usage', for use with |
1621 | * memory_report(). */ | |
1622 | void | |
1623 | ovsdb_monitor_get_memory_usage(struct simap *usage) | |
1624 | { | |
8302b6d1 | 1625 | struct ovsdb_monitor *dbmon; |
e0c73ed1 | 1626 | simap_put(usage, "monitors", hmap_count(&ovsdb_monitors)); |
8302b6d1 AZ |
1627 | |
1628 | HMAP_FOR_EACH(dbmon, hmap_node, &ovsdb_monitors) { | |
1629 | simap_increase(usage, "json-caches", hmap_count(&dbmon->json_cache)); | |
1630 | } | |
e0c73ed1 | 1631 | } |
53178986 BP |
1632 | |
1633 | void | |
1634 | ovsdb_monitor_prereplace_db(struct ovsdb *db) | |
1635 | { | |
1636 | struct ovsdb_monitor *m, *next_m; | |
1637 | ||
1638 | LIST_FOR_EACH_SAFE (m, next_m, list_node, &db->monitors) { | |
1639 | struct jsonrpc_monitor_node *jm, *next_jm; | |
1640 | ||
1641 | /* Delete all front-end monitors. Removing the last front-end monitor | |
1642 | * will also destroy the corresponding ovsdb_monitor. */ | |
1643 | LIST_FOR_EACH_SAFE (jm, next_jm, node, &m->jsonrpc_monitors) { | |
1644 | ovsdb_jsonrpc_monitor_destroy(jm->jsonrpc_monitor, true); | |
1645 | } | |
1646 | } | |
1647 | } |