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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; | |
e0f42d4a HZ |
123 | |
124 | /* Save the mt->n_columns that is used when creating the changes. | |
125 | * It can be different from the current mt->n_columns because | |
126 | * mt->n_columns can be increased when there are condition changes | |
127 | * from any of the clients sharing the dbmon. */ | |
128 | size_t n_columns; | |
1158f320 AZ |
129 | }; |
130 | ||
2fa1df7b AZ |
131 | /* A particular table being monitored. */ |
132 | struct ovsdb_monitor_table { | |
133 | const struct ovsdb_table *table; | |
134 | ||
135 | /* This is the union (bitwise-OR) of the 'select' values in all of the | |
136 | * members of 'columns' below. */ | |
137 | enum ovsdb_monitor_selection select; | |
138 | ||
139 | /* Columns being monitored. */ | |
140 | struct ovsdb_monitor_column *columns; | |
141 | size_t n_columns; | |
6150a75f LS |
142 | size_t n_monitored_columns; |
143 | size_t allocated_columns; | |
2fa1df7b | 144 | |
ec1eadce LS |
145 | /* Columns in ovsdb_monitor_row have different indexes then in |
146 | * ovsdb_row. This field maps between column->index to the index in the | |
147 | * ovsdb_monitor_row. It is used for condition evaluation. */ | |
148 | unsigned int *columns_index_map; | |
149 | ||
7e911055 AZ |
150 | /* Contains 'ovsdb_monitor_changes' indexed by 'transaction'. */ |
151 | struct hmap changes; | |
2fa1df7b AZ |
152 | }; |
153 | ||
845a1187 LS |
154 | enum ovsdb_monitor_row_type { |
155 | OVSDB_ROW, | |
156 | OVSDB_MONITOR_ROW | |
157 | }; | |
158 | ||
52553aea | 159 | typedef struct json * |
71cdf7cd LS |
160 | (*compose_row_update_cb_func) |
161 | (const struct ovsdb_monitor_table *mt, | |
162 | const struct ovsdb_monitor_session_condition * condition, | |
845a1187 LS |
163 | enum ovsdb_monitor_row_type row_type, |
164 | const void *, | |
e0f42d4a HZ |
165 | bool initial, unsigned long int *changed, |
166 | size_t n_columns); | |
52553aea | 167 | |
d9412837 | 168 | static void ovsdb_monitor_destroy(struct ovsdb_monitor *dbmon); |
6e5a9216 AZ |
169 | static struct ovsdb_monitor_changes * ovsdb_monitor_table_add_changes( |
170 | struct ovsdb_monitor_table *mt, uint64_t next_txn); | |
7e911055 AZ |
171 | static struct ovsdb_monitor_changes *ovsdb_monitor_table_find_changes( |
172 | struct ovsdb_monitor_table *mt, uint64_t unflushed); | |
1158f320 AZ |
173 | static void ovsdb_monitor_changes_destroy( |
174 | struct ovsdb_monitor_changes *changes); | |
175 | static void ovsdb_monitor_table_track_changes(struct ovsdb_monitor_table *mt, | |
7e911055 | 176 | uint64_t unflushed); |
d9412837 | 177 | |
a32b4433 HZ |
178 | static uint32_t |
179 | json_cache_hash(enum ovsdb_monitor_version version, uint64_t from_txn) | |
180 | { | |
181 | uint32_t hash; | |
182 | ||
183 | hash = hash_uint64(version); | |
184 | hash = hash_uint64_basis(from_txn, hash); | |
185 | ||
186 | return hash; | |
187 | } | |
188 | ||
4c280978 AZ |
189 | static struct ovsdb_monitor_json_cache_node * |
190 | ovsdb_monitor_json_cache_search(const struct ovsdb_monitor *dbmon, | |
a32b4433 | 191 | enum ovsdb_monitor_version version, |
4c280978 AZ |
192 | uint64_t from_txn) |
193 | { | |
194 | struct ovsdb_monitor_json_cache_node *node; | |
a32b4433 | 195 | uint32_t hash = json_cache_hash(version, from_txn); |
4c280978 AZ |
196 | |
197 | HMAP_FOR_EACH_WITH_HASH(node, hmap_node, hash, &dbmon->json_cache) { | |
a32b4433 | 198 | if (node->from_txn == from_txn && node->version == version) { |
4c280978 AZ |
199 | return node; |
200 | } | |
201 | } | |
202 | ||
203 | return NULL; | |
204 | } | |
205 | ||
206 | static void | |
207 | ovsdb_monitor_json_cache_insert(struct ovsdb_monitor *dbmon, | |
a32b4433 | 208 | enum ovsdb_monitor_version version, |
4c280978 AZ |
209 | uint64_t from_txn, struct json *json) |
210 | { | |
211 | struct ovsdb_monitor_json_cache_node *node; | |
a32b4433 | 212 | uint32_t hash = json_cache_hash(version, from_txn); |
4c280978 AZ |
213 | |
214 | node = xmalloc(sizeof *node); | |
215 | ||
a32b4433 | 216 | node->version = version; |
4c280978 AZ |
217 | node->from_txn = from_txn; |
218 | node->json = json ? json_clone(json) : NULL; | |
219 | ||
220 | hmap_insert(&dbmon->json_cache, &node->hmap_node, hash); | |
221 | } | |
222 | ||
223 | static void | |
224 | ovsdb_monitor_json_cache_flush(struct ovsdb_monitor *dbmon) | |
225 | { | |
4ec3d7c7 | 226 | struct ovsdb_monitor_json_cache_node *node; |
4c280978 | 227 | |
4ec3d7c7 | 228 | HMAP_FOR_EACH_POP(node, hmap_node, &dbmon->json_cache) { |
4c280978 AZ |
229 | json_destroy(node->json); |
230 | free(node); | |
231 | } | |
232 | } | |
233 | ||
2fa1df7b AZ |
234 | static int |
235 | compare_ovsdb_monitor_column(const void *a_, const void *b_) | |
236 | { | |
237 | const struct ovsdb_monitor_column *a = a_; | |
238 | const struct ovsdb_monitor_column *b = b_; | |
239 | ||
6150a75f LS |
240 | /* put all monitored columns at the begining */ |
241 | if (a->monitored != b->monitored) { | |
242 | return a->monitored ? -1 : 1; | |
243 | } | |
244 | ||
2fa1df7b AZ |
245 | return a->column < b->column ? -1 : a->column > b->column; |
246 | } | |
247 | ||
1158f320 | 248 | /* Finds and returns the ovsdb_monitor_row in 'mt->changes->rows' for the |
2fa1df7b AZ |
249 | * given 'uuid', or NULL if there is no such row. */ |
250 | static struct ovsdb_monitor_row * | |
7e911055 AZ |
251 | ovsdb_monitor_changes_row_find(const struct ovsdb_monitor_changes *changes, |
252 | const struct uuid *uuid) | |
2fa1df7b AZ |
253 | { |
254 | struct ovsdb_monitor_row *row; | |
255 | ||
1158f320 | 256 | HMAP_FOR_EACH_WITH_HASH (row, hmap_node, uuid_hash(uuid), |
7e911055 | 257 | &changes->rows) { |
2fa1df7b AZ |
258 | if (uuid_equals(uuid, &row->uuid)) { |
259 | return row; | |
260 | } | |
261 | } | |
262 | return NULL; | |
263 | } | |
264 | ||
e0f42d4a | 265 | /* Allocates an array of 'n_columns' ovsdb_datums and initializes them as |
2fa1df7b AZ |
266 | * copies of the data in 'row' drawn from the columns represented by |
267 | * mt->columns[]. Returns the array. | |
268 | * | |
269 | * If 'row' is NULL, returns NULL. */ | |
270 | static struct ovsdb_datum * | |
271 | clone_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
e0f42d4a HZ |
272 | const struct ovsdb_row *row, |
273 | size_t n_columns) | |
2fa1df7b AZ |
274 | { |
275 | struct ovsdb_datum *data; | |
276 | size_t i; | |
277 | ||
278 | if (!row) { | |
279 | return NULL; | |
280 | } | |
281 | ||
e0f42d4a HZ |
282 | data = xmalloc(n_columns * sizeof *data); |
283 | for (i = 0; i < n_columns; i++) { | |
2fa1df7b AZ |
284 | const struct ovsdb_column *c = mt->columns[i].column; |
285 | const struct ovsdb_datum *src = &row->fields[c->index]; | |
286 | struct ovsdb_datum *dst = &data[i]; | |
287 | const struct ovsdb_type *type = &c->type; | |
288 | ||
289 | ovsdb_datum_clone(dst, src, type); | |
290 | } | |
291 | return data; | |
292 | } | |
293 | ||
e0f42d4a | 294 | /* Replaces the n_columns ovsdb_datums in row[] by copies of the data from |
2fa1df7b AZ |
295 | * in 'row' drawn from the columns represented by mt->columns[]. */ |
296 | static void | |
297 | update_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
298 | const struct ovsdb_row *row, | |
e0f42d4a HZ |
299 | struct ovsdb_datum *data, |
300 | size_t n_columns) | |
2fa1df7b AZ |
301 | { |
302 | size_t i; | |
303 | ||
e0f42d4a | 304 | for (i = 0; i < n_columns; i++) { |
2fa1df7b AZ |
305 | const struct ovsdb_column *c = mt->columns[i].column; |
306 | const struct ovsdb_datum *src = &row->fields[c->index]; | |
307 | struct ovsdb_datum *dst = &data[i]; | |
308 | const struct ovsdb_type *type = &c->type; | |
309 | ||
310 | if (!ovsdb_datum_equals(src, dst, type)) { | |
311 | ovsdb_datum_destroy(dst, type); | |
312 | ovsdb_datum_clone(dst, src, type); | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
e0f42d4a | 317 | /* Frees all of the n_columns ovsdb_datums in data[], using the types taken |
2fa1df7b AZ |
318 | * from mt->columns[], plus 'data' itself. */ |
319 | static void | |
320 | free_monitor_row_data(const struct ovsdb_monitor_table *mt, | |
e0f42d4a HZ |
321 | struct ovsdb_datum *data, |
322 | size_t n_columns) | |
2fa1df7b AZ |
323 | { |
324 | if (data) { | |
325 | size_t i; | |
326 | ||
e0f42d4a | 327 | for (i = 0; i < n_columns; i++) { |
2fa1df7b AZ |
328 | const struct ovsdb_column *c = mt->columns[i].column; |
329 | ||
330 | ovsdb_datum_destroy(&data[i], &c->type); | |
331 | } | |
332 | free(data); | |
333 | } | |
334 | } | |
335 | ||
336 | /* Frees 'row', which must have been created from 'mt'. */ | |
337 | static void | |
338 | ovsdb_monitor_row_destroy(const struct ovsdb_monitor_table *mt, | |
e0f42d4a HZ |
339 | struct ovsdb_monitor_row *row, |
340 | size_t n_columns) | |
2fa1df7b AZ |
341 | { |
342 | if (row) { | |
e0f42d4a HZ |
343 | free_monitor_row_data(mt, row->old, n_columns); |
344 | free_monitor_row_data(mt, row->new, n_columns); | |
2fa1df7b AZ |
345 | free(row); |
346 | } | |
347 | } | |
348 | ||
ec1eadce LS |
349 | static void |
350 | ovsdb_monitor_columns_sort(struct ovsdb_monitor *dbmon) | |
351 | { | |
352 | int i; | |
353 | struct shash_node *node; | |
354 | ||
355 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
356 | struct ovsdb_monitor_table *mt = node->data; | |
357 | ||
358 | qsort(mt->columns, mt->n_columns, sizeof *mt->columns, | |
359 | compare_ovsdb_monitor_column); | |
360 | for (i = 0; i < mt->n_columns; i++) { | |
361 | /* re-set index map due to sort */ | |
362 | mt->columns_index_map[mt->columns[i].column->index] = i; | |
363 | } | |
364 | } | |
365 | } | |
366 | ||
6e5a9216 | 367 | void |
36247a75 AZ |
368 | ovsdb_monitor_add_jsonrpc_monitor(struct ovsdb_monitor *dbmon, |
369 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor) | |
370 | { | |
371 | struct jsonrpc_monitor_node *jm; | |
372 | ||
373 | jm = xzalloc(sizeof *jm); | |
374 | jm->jsonrpc_monitor = jsonrpc_monitor; | |
417e7e66 | 375 | ovs_list_push_back(&dbmon->jsonrpc_monitors, &jm->node); |
36247a75 AZ |
376 | } |
377 | ||
2fa1df7b AZ |
378 | struct ovsdb_monitor * |
379 | ovsdb_monitor_create(struct ovsdb *db, | |
380 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor) | |
381 | { | |
382 | struct ovsdb_monitor *dbmon; | |
383 | ||
384 | dbmon = xzalloc(sizeof *dbmon); | |
385 | ||
009bf21f | 386 | ovs_list_push_back(&db->monitors, &dbmon->list_node); |
417e7e66 | 387 | ovs_list_init(&dbmon->jsonrpc_monitors); |
2fa1df7b | 388 | dbmon->db = db; |
59c35e11 | 389 | dbmon->n_transactions = 0; |
2fa1df7b | 390 | shash_init(&dbmon->tables); |
6e5a9216 | 391 | hmap_node_nullify(&dbmon->hmap_node); |
4c280978 | 392 | hmap_init(&dbmon->json_cache); |
2fa1df7b | 393 | |
36247a75 | 394 | ovsdb_monitor_add_jsonrpc_monitor(dbmon, jsonrpc_monitor); |
2fa1df7b AZ |
395 | return dbmon; |
396 | } | |
397 | ||
398 | void | |
399 | ovsdb_monitor_add_table(struct ovsdb_monitor *m, | |
400 | const struct ovsdb_table *table) | |
401 | { | |
402 | struct ovsdb_monitor_table *mt; | |
ec1eadce LS |
403 | int i; |
404 | size_t n_columns = shash_count(&table->schema->columns); | |
2fa1df7b AZ |
405 | |
406 | mt = xzalloc(sizeof *mt); | |
407 | mt->table = table; | |
2fa1df7b | 408 | shash_add(&m->tables, table->schema->name, mt); |
7e911055 | 409 | hmap_init(&mt->changes); |
ec1eadce LS |
410 | mt->columns_index_map = |
411 | xmalloc(sizeof *mt->columns_index_map * n_columns); | |
412 | for (i = 0; i < n_columns; i++) { | |
413 | mt->columns_index_map[i] = -1; | |
414 | } | |
2fa1df7b AZ |
415 | } |
416 | ||
ec1eadce | 417 | const char * |
2fa1df7b AZ |
418 | ovsdb_monitor_add_column(struct ovsdb_monitor *dbmon, |
419 | const struct ovsdb_table *table, | |
420 | const struct ovsdb_column *column, | |
421 | enum ovsdb_monitor_selection select, | |
6150a75f | 422 | bool monitored) |
2fa1df7b AZ |
423 | { |
424 | struct ovsdb_monitor_table *mt; | |
425 | struct ovsdb_monitor_column *c; | |
426 | ||
427 | mt = shash_find_data(&dbmon->tables, table->schema->name); | |
428 | ||
ec1eadce LS |
429 | /* Check for column duplication. Return duplicated column name. */ |
430 | if (mt->columns_index_map[column->index] != -1) { | |
431 | return column->name; | |
432 | } | |
433 | ||
6150a75f LS |
434 | if (mt->n_columns >= mt->allocated_columns) { |
435 | mt->columns = x2nrealloc(mt->columns, &mt->allocated_columns, | |
2fa1df7b AZ |
436 | sizeof *mt->columns); |
437 | } | |
438 | ||
439 | mt->select |= select; | |
ec1eadce | 440 | mt->columns_index_map[column->index] = mt->n_columns; |
2fa1df7b AZ |
441 | c = &mt->columns[mt->n_columns++]; |
442 | c->column = column; | |
443 | c->select = select; | |
6150a75f LS |
444 | c->monitored = monitored; |
445 | if (monitored) { | |
446 | mt->n_monitored_columns++; | |
447 | } | |
2fa1df7b AZ |
448 | |
449 | return NULL; | |
450 | } | |
451 | ||
71cdf7cd LS |
452 | static void |
453 | ovsdb_monitor_condition_add_columns(struct ovsdb_monitor *dbmon, | |
454 | const struct ovsdb_table *table, | |
455 | struct ovsdb_condition *condition) | |
456 | { | |
457 | size_t n_columns; | |
458 | int i; | |
459 | const struct ovsdb_column **columns = | |
460 | ovsdb_condition_get_columns(condition, &n_columns); | |
461 | ||
462 | for (i = 0; i < n_columns; i++) { | |
463 | ovsdb_monitor_add_column(dbmon, table, columns[i], | |
464 | OJMS_NONE, false); | |
465 | } | |
466 | ||
467 | free(columns); | |
468 | } | |
469 | ||
470 | /* Bind this session's condition to ovsdb_monitor */ | |
471 | void | |
472 | ovsdb_monitor_condition_bind(struct ovsdb_monitor *dbmon, | |
473 | struct ovsdb_monitor_session_condition *cond) | |
474 | { | |
475 | struct shash_node *node; | |
476 | ||
477 | SHASH_FOR_EACH(node, &cond->tables) { | |
478 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
479 | struct ovsdb_monitor_table *mt = | |
480 | shash_find_data(&dbmon->tables, mtc->table->schema->name); | |
481 | ||
482 | mtc->mt = mt; | |
483 | ovsdb_monitor_condition_add_columns(dbmon, mtc->table, | |
484 | &mtc->new_condition); | |
485 | } | |
486 | } | |
487 | ||
845a1187 LS |
488 | bool |
489 | ovsdb_monitor_table_exists(struct ovsdb_monitor *m, | |
490 | const struct ovsdb_table *table) | |
491 | { | |
492 | return shash_find_data(&m->tables, table->schema->name); | |
493 | } | |
494 | ||
6e5a9216 | 495 | static struct ovsdb_monitor_changes * |
1158f320 AZ |
496 | ovsdb_monitor_table_add_changes(struct ovsdb_monitor_table *mt, |
497 | uint64_t next_txn) | |
498 | { | |
499 | struct ovsdb_monitor_changes *changes; | |
500 | ||
501 | changes = xzalloc(sizeof *changes); | |
502 | ||
503 | changes->transaction = next_txn; | |
504 | changes->mt = mt; | |
505 | changes->n_refs = 1; | |
e0f42d4a | 506 | changes->n_columns = mt->n_columns; |
1158f320 | 507 | hmap_init(&changes->rows); |
7e911055 | 508 | hmap_insert(&mt->changes, &changes->hmap_node, hash_uint64(next_txn)); |
6e5a9216 AZ |
509 | |
510 | return changes; | |
7e911055 AZ |
511 | }; |
512 | ||
513 | static struct ovsdb_monitor_changes * | |
514 | ovsdb_monitor_table_find_changes(struct ovsdb_monitor_table *mt, | |
515 | uint64_t transaction) | |
516 | { | |
517 | struct ovsdb_monitor_changes *changes; | |
518 | size_t hash = hash_uint64(transaction); | |
519 | ||
520 | HMAP_FOR_EACH_WITH_HASH(changes, hmap_node, hash, &mt->changes) { | |
521 | if (changes->transaction == transaction) { | |
522 | return changes; | |
523 | } | |
524 | } | |
525 | ||
526 | return NULL; | |
1158f320 AZ |
527 | } |
528 | ||
fcd48081 | 529 | /* Stop currently tracking changes to table 'mt' since 'transaction'. */ |
1158f320 AZ |
530 | static void |
531 | ovsdb_monitor_table_untrack_changes(struct ovsdb_monitor_table *mt, | |
532 | uint64_t transaction) | |
533 | { | |
7e911055 AZ |
534 | struct ovsdb_monitor_changes *changes = |
535 | ovsdb_monitor_table_find_changes(mt, transaction); | |
1158f320 | 536 | if (changes) { |
1158f320 | 537 | if (--changes->n_refs == 0) { |
7e911055 | 538 | hmap_remove(&mt->changes, &changes->hmap_node); |
1158f320 | 539 | ovsdb_monitor_changes_destroy(changes); |
1158f320 AZ |
540 | } |
541 | } | |
542 | } | |
543 | ||
544 | /* Start tracking changes to table 'mt' begins from 'transaction' inclusive. | |
545 | */ | |
546 | static void | |
547 | ovsdb_monitor_table_track_changes(struct ovsdb_monitor_table *mt, | |
548 | uint64_t transaction) | |
549 | { | |
7e911055 AZ |
550 | struct ovsdb_monitor_changes *changes; |
551 | ||
552 | changes = ovsdb_monitor_table_find_changes(mt, transaction); | |
553 | if (changes) { | |
554 | changes->n_refs++; | |
555 | } else { | |
556 | ovsdb_monitor_table_add_changes(mt, transaction); | |
557 | } | |
1158f320 AZ |
558 | } |
559 | ||
560 | static void | |
561 | ovsdb_monitor_changes_destroy(struct ovsdb_monitor_changes *changes) | |
562 | { | |
563 | struct ovsdb_monitor_row *row, *next; | |
564 | ||
565 | HMAP_FOR_EACH_SAFE (row, next, hmap_node, &changes->rows) { | |
566 | hmap_remove(&changes->rows, &row->hmap_node); | |
e0f42d4a | 567 | ovsdb_monitor_row_destroy(changes->mt, row, changes->n_columns); |
1158f320 AZ |
568 | } |
569 | hmap_destroy(&changes->rows); | |
570 | free(changes); | |
571 | } | |
572 | ||
23cbedb7 AZ |
573 | static enum ovsdb_monitor_selection |
574 | ovsdb_monitor_row_update_type(bool initial, const bool old, const bool new) | |
575 | { | |
576 | return initial ? OJMS_INITIAL | |
577 | : !old ? OJMS_INSERT | |
578 | : !new ? OJMS_DELETE | |
579 | : OJMS_MODIFY; | |
580 | } | |
71cdf7cd LS |
581 | |
582 | /* Set conditional monitoring mode only if we have non-empty condition in one | |
583 | * of the tables at least */ | |
584 | static inline void | |
585 | ovsdb_monitor_session_condition_set_mode( | |
586 | struct ovsdb_monitor_session_condition *cond) | |
587 | { | |
e4ef6881 BP |
588 | struct shash_node *node; |
589 | ||
590 | SHASH_FOR_EACH (node, &cond->tables) { | |
591 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
592 | ||
593 | if (!ovsdb_condition_is_true(&mtc->new_condition)) { | |
594 | cond->conditional = true; | |
595 | return; | |
596 | } | |
597 | } | |
598 | cond->conditional = false; | |
71cdf7cd LS |
599 | } |
600 | ||
601 | /* Returnes an empty allocated session's condition state holder */ | |
602 | struct ovsdb_monitor_session_condition * | |
603 | ovsdb_monitor_session_condition_create(void) | |
604 | { | |
605 | struct ovsdb_monitor_session_condition *condition = | |
606 | xzalloc(sizeof *condition); | |
607 | ||
608 | condition->conditional = false; | |
609 | shash_init(&condition->tables); | |
610 | return condition; | |
611 | } | |
612 | ||
613 | void | |
614 | ovsdb_monitor_session_condition_destroy( | |
615 | struct ovsdb_monitor_session_condition *condition) | |
616 | { | |
617 | struct shash_node *node, *next; | |
618 | ||
619 | if (!condition) { | |
620 | return; | |
621 | } | |
622 | ||
623 | SHASH_FOR_EACH_SAFE (node, next, &condition->tables) { | |
624 | struct ovsdb_monitor_table_condition *mtc = node->data; | |
625 | ||
626 | ovsdb_condition_destroy(&mtc->new_condition); | |
627 | ovsdb_condition_destroy(&mtc->old_condition); | |
628 | shash_delete(&condition->tables, node); | |
629 | free(mtc); | |
630 | } | |
d3c8a7e8 | 631 | shash_destroy(&condition->tables); |
71cdf7cd LS |
632 | free(condition); |
633 | } | |
634 | ||
635 | struct ovsdb_error * | |
636 | ovsdb_monitor_table_condition_create( | |
637 | struct ovsdb_monitor_session_condition *condition, | |
638 | const struct ovsdb_table *table, | |
639 | const struct json *json_cnd) | |
640 | { | |
641 | struct ovsdb_monitor_table_condition *mtc; | |
642 | struct ovsdb_error *error; | |
643 | ||
644 | mtc = xzalloc(sizeof *mtc); | |
645 | mtc->table = table; | |
646 | ovsdb_condition_init(&mtc->old_condition); | |
647 | ovsdb_condition_init(&mtc->new_condition); | |
648 | ||
649 | if (json_cnd) { | |
650 | error = ovsdb_condition_from_json(table->schema, | |
651 | json_cnd, | |
652 | NULL, | |
653 | &mtc->old_condition); | |
654 | if (error) { | |
655 | free(mtc); | |
656 | return error; | |
657 | } | |
658 | } | |
659 | ||
660 | shash_add(&condition->tables, table->schema->name, mtc); | |
661 | /* On session startup old == new condition */ | |
662 | ovsdb_condition_clone(&mtc->new_condition, &mtc->old_condition); | |
5707b87d | 663 | ovsdb_monitor_session_condition_set_mode(condition); |
71cdf7cd LS |
664 | |
665 | return NULL; | |
666 | } | |
667 | ||
668 | static bool | |
669 | ovsdb_monitor_get_table_conditions( | |
670 | const struct ovsdb_monitor_table *mt, | |
671 | const struct ovsdb_monitor_session_condition *condition, | |
672 | struct ovsdb_condition **old_condition, | |
673 | struct ovsdb_condition **new_condition) | |
674 | { | |
675 | if (!condition) { | |
676 | return false; | |
677 | } | |
678 | ||
679 | struct ovsdb_monitor_table_condition *mtc = | |
680 | shash_find_data(&condition->tables, mt->table->schema->name); | |
681 | ||
682 | if (!mtc) { | |
683 | return false; | |
684 | } | |
685 | *old_condition = &mtc->old_condition; | |
686 | *new_condition = &mtc->new_condition; | |
687 | ||
688 | return true; | |
689 | } | |
690 | ||
845a1187 LS |
691 | struct ovsdb_error * |
692 | ovsdb_monitor_table_condition_update( | |
693 | struct ovsdb_monitor *dbmon, | |
694 | struct ovsdb_monitor_session_condition *condition, | |
695 | const struct ovsdb_table *table, | |
696 | const struct json *cond_json) | |
697 | { | |
c1efab9b BP |
698 | if (!condition) { |
699 | return NULL; | |
700 | } | |
701 | ||
845a1187 LS |
702 | struct ovsdb_monitor_table_condition *mtc = |
703 | shash_find_data(&condition->tables, table->schema->name); | |
704 | struct ovsdb_error *error; | |
f0d7ae19 | 705 | struct ovsdb_condition cond = OVSDB_CONDITION_INITIALIZER(&cond); |
845a1187 | 706 | |
845a1187 LS |
707 | error = ovsdb_condition_from_json(table->schema, cond_json, |
708 | NULL, &cond); | |
709 | if (error) { | |
710 | return error; | |
711 | } | |
712 | ovsdb_condition_destroy(&mtc->new_condition); | |
713 | ovsdb_condition_clone(&mtc->new_condition, &cond); | |
714 | ovsdb_condition_destroy(&cond); | |
715 | ovsdb_monitor_condition_add_columns(dbmon, | |
716 | table, | |
717 | &mtc->new_condition); | |
718 | ||
719 | return NULL; | |
720 | } | |
721 | ||
722 | static void | |
723 | ovsdb_monitor_table_condition_updated(struct ovsdb_monitor_table *mt, | |
724 | struct ovsdb_monitor_session_condition *condition) | |
725 | { | |
726 | struct ovsdb_monitor_table_condition *mtc = | |
727 | shash_find_data(&condition->tables, mt->table->schema->name); | |
728 | ||
729 | if (mtc) { | |
730 | /* If conditional monitoring - set old condition to new condition */ | |
731 | if (ovsdb_condition_cmp_3way(&mtc->old_condition, | |
732 | &mtc->new_condition)) { | |
845a1187 LS |
733 | ovsdb_condition_destroy(&mtc->old_condition); |
734 | ovsdb_condition_clone(&mtc->old_condition, &mtc->new_condition); | |
735 | ovsdb_monitor_session_condition_set_mode(condition); | |
736 | } | |
737 | } | |
738 | } | |
739 | ||
71cdf7cd LS |
740 | static enum ovsdb_monitor_selection |
741 | ovsdb_monitor_row_update_type_condition( | |
742 | const struct ovsdb_monitor_table *mt, | |
743 | const struct ovsdb_monitor_session_condition *condition, | |
744 | bool initial, | |
845a1187 | 745 | enum ovsdb_monitor_row_type row_type, |
71cdf7cd LS |
746 | const struct ovsdb_datum *old, |
747 | const struct ovsdb_datum *new) | |
748 | { | |
749 | struct ovsdb_condition *old_condition, *new_condition; | |
750 | enum ovsdb_monitor_selection type = | |
751 | ovsdb_monitor_row_update_type(initial, old, new); | |
752 | ||
753 | if (ovsdb_monitor_get_table_conditions(mt, | |
754 | condition, | |
755 | &old_condition, | |
756 | &new_condition)) { | |
757 | bool old_cond = !old ? false | |
758 | : ovsdb_condition_empty_or_match_any(old, | |
845a1187 LS |
759 | old_condition, |
760 | row_type == OVSDB_MONITOR_ROW ? | |
761 | mt->columns_index_map : | |
762 | NULL); | |
71cdf7cd LS |
763 | bool new_cond = !new ? false |
764 | : ovsdb_condition_empty_or_match_any(new, | |
845a1187 LS |
765 | new_condition, |
766 | row_type == OVSDB_MONITOR_ROW ? | |
767 | mt->columns_index_map : | |
768 | NULL); | |
71cdf7cd LS |
769 | |
770 | if (!old_cond && !new_cond) { | |
771 | type = OJMS_NONE; | |
772 | } | |
773 | ||
774 | switch (type) { | |
775 | case OJMS_INITIAL: | |
776 | case OJMS_INSERT: | |
777 | if (!new_cond) { | |
778 | type = OJMS_NONE; | |
779 | } | |
780 | break; | |
781 | case OJMS_MODIFY: | |
782 | type = !old_cond ? OJMS_INSERT : !new_cond | |
783 | ? OJMS_DELETE : OJMS_MODIFY; | |
784 | break; | |
785 | case OJMS_DELETE: | |
786 | if (!old_cond) { | |
787 | type = OJMS_NONE; | |
788 | } | |
789 | break; | |
790 | case OJMS_NONE: | |
791 | break; | |
792 | } | |
793 | } | |
794 | return type; | |
795 | } | |
796 | ||
52553aea AZ |
797 | static bool |
798 | ovsdb_monitor_row_skip_update(const struct ovsdb_monitor_table *mt, | |
845a1187 LS |
799 | enum ovsdb_monitor_row_type row_type, |
800 | const struct ovsdb_datum *old, | |
801 | const struct ovsdb_datum *new, | |
52553aea | 802 | enum ovsdb_monitor_selection type, |
e0f42d4a HZ |
803 | unsigned long int *changed, |
804 | size_t n_columns) | |
52553aea AZ |
805 | { |
806 | if (!(mt->select & type)) { | |
807 | return true; | |
808 | } | |
809 | ||
810 | if (type == OJMS_MODIFY) { | |
811 | size_t i, n_changes; | |
812 | ||
813 | n_changes = 0; | |
e0f42d4a HZ |
814 | memset(changed, 0, bitmap_n_bytes(n_columns)); |
815 | for (i = 0; i < n_columns; i++) { | |
52553aea | 816 | const struct ovsdb_column *c = mt->columns[i].column; |
845a1187 LS |
817 | size_t index = row_type == OVSDB_ROW ? c->index : i; |
818 | if (!ovsdb_datum_equals(&old[index], &new[index], &c->type)) { | |
52553aea AZ |
819 | bitmap_set1(changed, i); |
820 | n_changes++; | |
821 | } | |
822 | } | |
823 | if (!n_changes) { | |
824 | /* No actual changes: presumably a row changed and then | |
825 | * changed back later. */ | |
826 | return true; | |
827 | } | |
828 | } | |
829 | ||
830 | return false; | |
831 | } | |
23cbedb7 | 832 | |
2fa1df7b AZ |
833 | /* Returns JSON for a <row-update> (as described in RFC 7047) for 'row' within |
834 | * 'mt', or NULL if no row update should be sent. | |
835 | * | |
836 | * The caller should specify 'initial' as true if the returned JSON is going to | |
837 | * be used as part of the initial reply to a "monitor" request, false if it is | |
838 | * going to be used as part of an "update" notification. | |
839 | * | |
840 | * 'changed' must be a scratch buffer for internal use that is at least | |
e0f42d4a | 841 | * bitmap_n_bytes(n_columns) bytes long. */ |
2fa1df7b AZ |
842 | static struct json * |
843 | ovsdb_monitor_compose_row_update( | |
844 | const struct ovsdb_monitor_table *mt, | |
71cdf7cd | 845 | const struct ovsdb_monitor_session_condition *condition OVS_UNUSED, |
845a1187 LS |
846 | enum ovsdb_monitor_row_type row_type OVS_UNUSED, |
847 | const void *_row, | |
e0f42d4a HZ |
848 | bool initial, unsigned long int *changed, |
849 | size_t n_columns OVS_UNUSED) | |
2fa1df7b | 850 | { |
845a1187 | 851 | const struct ovsdb_monitor_row *row = _row; |
2fa1df7b AZ |
852 | enum ovsdb_monitor_selection type; |
853 | struct json *old_json, *new_json; | |
854 | struct json *row_json; | |
855 | size_t i; | |
856 | ||
845a1187 | 857 | ovs_assert(row_type == OVSDB_MONITOR_ROW); |
23cbedb7 | 858 | type = ovsdb_monitor_row_update_type(initial, row->old, row->new); |
845a1187 | 859 | if (ovsdb_monitor_row_skip_update(mt, row_type, row->old, |
e0f42d4a HZ |
860 | row->new, type, changed, |
861 | mt->n_columns)) { | |
2fa1df7b AZ |
862 | return NULL; |
863 | } | |
864 | ||
2fa1df7b AZ |
865 | row_json = json_object_create(); |
866 | old_json = new_json = NULL; | |
867 | if (type & (OJMS_DELETE | OJMS_MODIFY)) { | |
868 | old_json = json_object_create(); | |
869 | json_object_put(row_json, "old", old_json); | |
870 | } | |
871 | if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) { | |
872 | new_json = json_object_create(); | |
873 | json_object_put(row_json, "new", new_json); | |
874 | } | |
6150a75f | 875 | for (i = 0; i < mt->n_monitored_columns; i++) { |
2fa1df7b AZ |
876 | const struct ovsdb_monitor_column *c = &mt->columns[i]; |
877 | ||
6150a75f | 878 | if (!c->monitored || !(type & c->select)) { |
2fa1df7b AZ |
879 | /* We don't care about this type of change for this |
880 | * particular column (but we will care about it for some | |
881 | * other column). */ | |
882 | continue; | |
883 | } | |
884 | ||
885 | if ((type == OJMS_MODIFY && bitmap_is_set(changed, i)) | |
886 | || type == OJMS_DELETE) { | |
887 | json_object_put(old_json, c->column->name, | |
888 | ovsdb_datum_to_json(&row->old[i], | |
889 | &c->column->type)); | |
890 | } | |
891 | if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) { | |
892 | json_object_put(new_json, c->column->name, | |
893 | ovsdb_datum_to_json(&row->new[i], | |
894 | &c->column->type)); | |
895 | } | |
896 | } | |
897 | ||
898 | return row_json; | |
899 | } | |
900 | ||
52553aea AZ |
901 | /* Returns JSON for a <row-update2> (as described in ovsdb-server(1) mapage) |
902 | * for 'row' within * 'mt', or NULL if no row update should be sent. | |
903 | * | |
904 | * The caller should specify 'initial' as true if the returned JSON is | |
845a1187 | 905 | * going to be used as part of the initial reply to a "monitor_cond" request, |
52553aea AZ |
906 | * false if it is going to be used as part of an "update2" notification. |
907 | * | |
908 | * 'changed' must be a scratch buffer for internal use that is at least | |
e0f42d4a | 909 | * bitmap_n_bytes(n_columns) bytes long. */ |
52553aea AZ |
910 | static struct json * |
911 | ovsdb_monitor_compose_row_update2( | |
912 | const struct ovsdb_monitor_table *mt, | |
71cdf7cd | 913 | const struct ovsdb_monitor_session_condition *condition, |
845a1187 LS |
914 | enum ovsdb_monitor_row_type row_type, |
915 | const void *_row, | |
e0f42d4a HZ |
916 | bool initial, unsigned long int *changed, |
917 | size_t n_columns) | |
52553aea AZ |
918 | { |
919 | enum ovsdb_monitor_selection type; | |
920 | struct json *row_update2, *diff_json; | |
845a1187 | 921 | const struct ovsdb_datum *old, *new; |
52553aea AZ |
922 | size_t i; |
923 | ||
845a1187 LS |
924 | if (row_type == OVSDB_MONITOR_ROW) { |
925 | old = ((const struct ovsdb_monitor_row *)_row)->old;; | |
926 | new = ((const struct ovsdb_monitor_row *)_row)->new; | |
927 | } else { | |
928 | old = new = ((const struct ovsdb_row *)_row)->fields; | |
929 | } | |
930 | ||
71cdf7cd | 931 | type = ovsdb_monitor_row_update_type_condition(mt, condition, initial, |
845a1187 | 932 | row_type, old, new); |
e0f42d4a HZ |
933 | if (ovsdb_monitor_row_skip_update(mt, row_type, old, new, type, changed, |
934 | n_columns)) { | |
52553aea AZ |
935 | return NULL; |
936 | } | |
937 | ||
938 | row_update2 = json_object_create(); | |
939 | if (type == OJMS_DELETE) { | |
940 | json_object_put(row_update2, "delete", json_null_create()); | |
941 | } else { | |
942 | diff_json = json_object_create(); | |
943 | const char *op; | |
944 | ||
6150a75f | 945 | for (i = 0; i < mt->n_monitored_columns; i++) { |
52553aea | 946 | const struct ovsdb_monitor_column *c = &mt->columns[i]; |
845a1187 | 947 | size_t index = row_type == OVSDB_ROW ? c->column->index : i; |
6150a75f | 948 | if (!c->monitored || !(type & c->select)) { |
52553aea AZ |
949 | /* We don't care about this type of change for this |
950 | * particular column (but we will care about it for some | |
951 | * other column). */ | |
952 | continue; | |
953 | } | |
954 | ||
955 | if (type == OJMS_MODIFY) { | |
956 | struct ovsdb_datum diff; | |
957 | ||
958 | if (!bitmap_is_set(changed, i)) { | |
959 | continue; | |
960 | } | |
961 | ||
845a1187 | 962 | ovsdb_datum_diff(&diff ,&old[index], &new[index], |
52553aea AZ |
963 | &c->column->type); |
964 | json_object_put(diff_json, c->column->name, | |
965 | ovsdb_datum_to_json(&diff, &c->column->type)); | |
966 | ovsdb_datum_destroy(&diff, &c->column->type); | |
967 | } else { | |
845a1187 | 968 | if (!ovsdb_datum_is_default(&new[index], &c->column->type)) { |
52553aea | 969 | json_object_put(diff_json, c->column->name, |
845a1187 | 970 | ovsdb_datum_to_json(&new[index], |
52553aea AZ |
971 | &c->column->type)); |
972 | } | |
973 | } | |
974 | } | |
975 | ||
976 | op = type == OJMS_INITIAL ? "initial" | |
977 | : type == OJMS_MODIFY ? "modify" : "insert"; | |
978 | json_object_put(row_update2, op, diff_json); | |
979 | } | |
980 | ||
981 | return row_update2; | |
982 | } | |
983 | ||
6cef8e87 AZ |
984 | static size_t |
985 | ovsdb_monitor_max_columns(struct ovsdb_monitor *dbmon) | |
986 | { | |
987 | struct shash_node *node; | |
988 | size_t max_columns = 0; | |
989 | ||
990 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
991 | struct ovsdb_monitor_table *mt = node->data; | |
992 | ||
993 | max_columns = MAX(max_columns, mt->n_columns); | |
994 | } | |
995 | ||
996 | return max_columns; | |
997 | } | |
998 | ||
845a1187 LS |
999 | static void |
1000 | ovsdb_monitor_add_json_row(struct json **json, const char *table_name, | |
1001 | struct json **table_json, struct json *row_json, | |
1002 | const struct uuid *row_uuid) | |
1003 | { | |
1004 | char uuid[UUID_LEN + 1]; | |
1005 | ||
1006 | /* Create JSON object for transaction overall. */ | |
1007 | if (!*json) { | |
1008 | *json = json_object_create(); | |
1009 | } | |
1010 | ||
1011 | /* Create JSON object for transaction on this table. */ | |
1012 | if (!*table_json) { | |
1013 | *table_json = json_object_create(); | |
1014 | json_object_put(*json, table_name, *table_json); | |
1015 | } | |
1016 | ||
1017 | /* Add JSON row to JSON table. */ | |
1018 | snprintf(uuid, sizeof uuid, UUID_FMT, UUID_ARGS(row_uuid)); | |
1019 | json_object_put(*table_json, uuid, row_json); | |
1020 | } | |
1021 | ||
2fa1df7b | 1022 | /* Constructs and returns JSON for a <table-updates> object (as described in |
4c280978 AZ |
1023 | * RFC 7047) for all the outstanding changes within 'monitor', starting from |
1024 | * 'transaction'. */ | |
1025 | static struct json* | |
71cdf7cd LS |
1026 | ovsdb_monitor_compose_update( |
1027 | struct ovsdb_monitor *dbmon, | |
1028 | bool initial, uint64_t transaction, | |
1029 | const struct ovsdb_monitor_session_condition *condition, | |
1030 | compose_row_update_cb_func row_update) | |
2fa1df7b AZ |
1031 | { |
1032 | struct shash_node *node; | |
2fa1df7b | 1033 | struct json *json; |
6cef8e87 AZ |
1034 | size_t max_columns = ovsdb_monitor_max_columns(dbmon); |
1035 | unsigned long int *changed = xmalloc(bitmap_n_bytes(max_columns)); | |
2fa1df7b AZ |
1036 | |
1037 | json = NULL; | |
1038 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1039 | struct ovsdb_monitor_table *mt = node->data; | |
1040 | struct ovsdb_monitor_row *row, *next; | |
7e911055 | 1041 | struct ovsdb_monitor_changes *changes; |
2fa1df7b AZ |
1042 | struct json *table_json = NULL; |
1043 | ||
4c280978 | 1044 | changes = ovsdb_monitor_table_find_changes(mt, transaction); |
7e911055 | 1045 | if (!changes) { |
1158f320 AZ |
1046 | continue; |
1047 | } | |
1048 | ||
70ec021a AS |
1049 | HMAP_FOR_EACH_SAFE (row, next, hmap_node, &changes->rows) { |
1050 | struct json *row_json; | |
1051 | row_json = (*row_update)(mt, condition, OVSDB_MONITOR_ROW, row, | |
e0f42d4a | 1052 | initial, changed, changes->n_columns); |
70ec021a AS |
1053 | if (row_json) { |
1054 | ovsdb_monitor_add_json_row(&json, mt->table->schema->name, | |
1055 | &table_json, row_json, | |
1056 | &row->uuid); | |
1057 | } | |
1058 | } | |
1059 | } | |
845a1187 | 1060 | free(changed); |
2fa1df7b | 1061 | |
845a1187 LS |
1062 | return json; |
1063 | } | |
2fa1df7b | 1064 | |
845a1187 LS |
1065 | static struct json* |
1066 | ovsdb_monitor_compose_cond_change_update( | |
1067 | struct ovsdb_monitor *dbmon, | |
1068 | struct ovsdb_monitor_session_condition *condition) | |
1069 | { | |
1070 | struct shash_node *node; | |
1071 | struct json *json = NULL; | |
1072 | size_t max_columns = ovsdb_monitor_max_columns(dbmon); | |
1073 | unsigned long int *changed = xmalloc(bitmap_n_bytes(max_columns)); | |
2fa1df7b | 1074 | |
845a1187 LS |
1075 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1076 | struct ovsdb_monitor_table *mt = node->data; | |
1077 | struct ovsdb_row *row; | |
1078 | struct json *table_json = NULL; | |
1079 | struct ovsdb_condition *old_condition, *new_condition; | |
1080 | ||
1081 | if (!ovsdb_monitor_get_table_conditions(mt, | |
1082 | condition, | |
1083 | &old_condition, | |
1084 | &new_condition) || | |
1085 | !ovsdb_condition_cmp_3way(old_condition, new_condition)) { | |
1086 | /* Nothing to update on this table */ | |
1087 | continue; | |
1088 | } | |
2fa1df7b | 1089 | |
845a1187 LS |
1090 | /* Iterate over all rows in table */ |
1091 | HMAP_FOR_EACH (row, hmap_node, &mt->table->rows) { | |
1092 | struct json *row_json; | |
1093 | ||
1094 | row_json = ovsdb_monitor_compose_row_update2(mt, condition, | |
1095 | OVSDB_ROW, row, | |
e0f42d4a HZ |
1096 | false, changed, |
1097 | mt->n_columns); | |
845a1187 LS |
1098 | if (row_json) { |
1099 | ovsdb_monitor_add_json_row(&json, mt->table->schema->name, | |
1100 | &table_json, row_json, | |
1101 | ovsdb_row_get_uuid(row)); | |
2fa1df7b | 1102 | } |
2fa1df7b | 1103 | } |
845a1187 | 1104 | ovsdb_monitor_table_condition_updated(mt, condition); |
4c280978 AZ |
1105 | } |
1106 | free(changed); | |
1107 | ||
1108 | return json; | |
1109 | } | |
1110 | ||
1111 | /* Returns JSON for a <table-updates> object (as described in RFC 7047) | |
1112 | * for all the outstanding changes within 'monitor' that starts from | |
845a1187 LS |
1113 | * '*unflushed'. |
1114 | * If cond_updated is true all rows in the db that match conditions will be | |
1115 | * sent. | |
4c280978 AZ |
1116 | * |
1117 | * The caller should specify 'initial' as true if the returned JSON is going to | |
1118 | * be used as part of the initial reply to a "monitor" request, false if it is | |
1119 | * going to be used as part of an "update" notification. */ | |
1120 | struct json * | |
71cdf7cd LS |
1121 | ovsdb_monitor_get_update( |
1122 | struct ovsdb_monitor *dbmon, | |
845a1187 LS |
1123 | bool initial, bool cond_updated, |
1124 | uint64_t *unflushed_, | |
1125 | struct ovsdb_monitor_session_condition *condition, | |
71cdf7cd | 1126 | enum ovsdb_monitor_version version) |
4c280978 | 1127 | { |
71cdf7cd | 1128 | struct ovsdb_monitor_json_cache_node *cache_node = NULL; |
4c280978 AZ |
1129 | struct shash_node *node; |
1130 | struct json *json; | |
765b5a0e AZ |
1131 | const uint64_t unflushed = *unflushed_; |
1132 | const uint64_t next_unflushed = dbmon->n_transactions + 1; | |
4c280978 | 1133 | |
845a1187 LS |
1134 | ovs_assert(cond_updated ? unflushed == next_unflushed : true); |
1135 | ||
4c280978 AZ |
1136 | /* Return a clone of cached json if one exists. Otherwise, |
1137 | * generate a new one and add it to the cache. */ | |
845a1187 | 1138 | if (!condition || (!condition->conditional && !cond_updated)) { |
71cdf7cd LS |
1139 | cache_node = ovsdb_monitor_json_cache_search(dbmon, version, |
1140 | unflushed); | |
1141 | } | |
4c280978 AZ |
1142 | if (cache_node) { |
1143 | json = cache_node->json ? json_clone(cache_node->json) : NULL; | |
1144 | } else { | |
52553aea | 1145 | if (version == OVSDB_MONITOR_V1) { |
71cdf7cd LS |
1146 | json = |
1147 | ovsdb_monitor_compose_update(dbmon, initial, unflushed, | |
1148 | condition, | |
1149 | ovsdb_monitor_compose_row_update); | |
52553aea AZ |
1150 | } else { |
1151 | ovs_assert(version == OVSDB_MONITOR_V2); | |
845a1187 | 1152 | if (!cond_updated) { |
70ec021a AS |
1153 | json = ovsdb_monitor_compose_update(dbmon, initial, unflushed, |
1154 | condition, | |
1155 | ovsdb_monitor_compose_row_update2); | |
1156 | ||
1157 | if (!condition || !condition->conditional) { | |
1158 | ovsdb_monitor_json_cache_insert(dbmon, version, unflushed, | |
1159 | json); | |
1160 | } | |
1161 | } else { | |
845a1187 LS |
1162 | /* Compose update on whole db due to condition update. |
1163 | Session must be flushed (change list is empty)*/ | |
70ec021a AS |
1164 | json = |
1165 | ovsdb_monitor_compose_cond_change_update(dbmon, condition); | |
1166 | } | |
1167 | } | |
4c280978 AZ |
1168 | } |
1169 | ||
1170 | /* Maintain transaction id of 'changes'. */ | |
1171 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1172 | struct ovsdb_monitor_table *mt = node->data; | |
1158f320 | 1173 | |
765b5a0e AZ |
1174 | ovsdb_monitor_table_untrack_changes(mt, unflushed); |
1175 | ovsdb_monitor_table_track_changes(mt, next_unflushed); | |
2fa1df7b | 1176 | } |
765b5a0e | 1177 | *unflushed_ = next_unflushed; |
4c280978 | 1178 | |
2fa1df7b AZ |
1179 | return json; |
1180 | } | |
1181 | ||
1182 | bool | |
59c35e11 AZ |
1183 | ovsdb_monitor_needs_flush(struct ovsdb_monitor *dbmon, |
1184 | uint64_t next_transaction) | |
2fa1df7b | 1185 | { |
59c35e11 AZ |
1186 | ovs_assert(next_transaction <= dbmon->n_transactions + 1); |
1187 | return (next_transaction <= dbmon->n_transactions); | |
2fa1df7b AZ |
1188 | } |
1189 | ||
1190 | void | |
1191 | ovsdb_monitor_table_add_select(struct ovsdb_monitor *dbmon, | |
1192 | const struct ovsdb_table *table, | |
1193 | enum ovsdb_monitor_selection select) | |
1194 | { | |
1195 | struct ovsdb_monitor_table * mt; | |
1196 | ||
1197 | mt = shash_find_data(&dbmon->tables, table->schema->name); | |
1198 | mt->select |= select; | |
1199 | } | |
1200 | ||
58de87cc AZ |
1201 | /* |
1202 | * If a row's change type (insert, delete or modify) matches that of | |
1203 | * the monitor, they should be sent to the monitor's clients as updates. | |
1204 | * Of cause, the monitor should also internally update with this change. | |
1205 | * | |
1206 | * When a change type does not require client side update, the monitor | |
1207 | * may still need to keep track of certain changes in order to generate | |
1208 | * correct future updates. For example, the monitor internal state should | |
1209 | * be updated whenever a new row is inserted, in order to generate the | |
1210 | * correct initial state, regardless if a insert change type is being | |
1211 | * monitored. | |
1212 | * | |
1213 | * On the other hand, if a transaction only contains changes to columns | |
1214 | * that are not monitored, this transaction can be safely ignored by the | |
1215 | * monitor. | |
1216 | * | |
1217 | * Thus, the order of the declaration is important: | |
1218 | * 'OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE' always implies | |
1219 | * 'OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE', but not vice versa. */ | |
1220 | enum ovsdb_monitor_changes_efficacy { | |
1221 | OVSDB_CHANGES_NO_EFFECT, /* Monitor does not care about this | |
1222 | change. */ | |
1223 | OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE, /* Monitor internal updates. */ | |
1224 | OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE, /* Client needs to be updated. */ | |
1225 | }; | |
1226 | ||
2fa1df7b AZ |
1227 | struct ovsdb_monitor_aux { |
1228 | const struct ovsdb_monitor *monitor; | |
1229 | struct ovsdb_monitor_table *mt; | |
a0cba5c2 | 1230 | enum ovsdb_monitor_changes_efficacy efficacy; |
2fa1df7b AZ |
1231 | }; |
1232 | ||
1233 | static void | |
1234 | ovsdb_monitor_init_aux(struct ovsdb_monitor_aux *aux, | |
1235 | const struct ovsdb_monitor *m) | |
1236 | { | |
1237 | aux->monitor = m; | |
1238 | aux->mt = NULL; | |
a0cba5c2 | 1239 | aux->efficacy = OVSDB_CHANGES_NO_EFFECT; |
2fa1df7b AZ |
1240 | } |
1241 | ||
7e911055 AZ |
1242 | static void |
1243 | ovsdb_monitor_changes_update(const struct ovsdb_row *old, | |
1244 | const struct ovsdb_row *new, | |
1245 | const struct ovsdb_monitor_table *mt, | |
1246 | struct ovsdb_monitor_changes *changes) | |
2fa1df7b | 1247 | { |
2fa1df7b AZ |
1248 | const struct uuid *uuid = ovsdb_row_get_uuid(new ? new : old); |
1249 | struct ovsdb_monitor_row *change; | |
2fa1df7b | 1250 | |
7e911055 | 1251 | change = ovsdb_monitor_changes_row_find(changes, uuid); |
2fa1df7b | 1252 | if (!change) { |
1158f320 | 1253 | change = xzalloc(sizeof *change); |
7e911055 | 1254 | hmap_insert(&changes->rows, &change->hmap_node, uuid_hash(uuid)); |
2fa1df7b | 1255 | change->uuid = *uuid; |
e0f42d4a HZ |
1256 | change->old = clone_monitor_row_data(mt, old, changes->n_columns); |
1257 | change->new = clone_monitor_row_data(mt, new, changes->n_columns); | |
2fa1df7b AZ |
1258 | } else { |
1259 | if (new) { | |
20853442 AZ |
1260 | if (!change->new) { |
1261 | /* Reinsert the row that was just deleted. | |
1262 | * | |
1263 | * This path won't be hit without replication. Whenever OVSDB | |
1264 | * server inserts a new row, It always generates a new UUID | |
1265 | * that is different from the row just deleted. | |
1266 | * | |
1267 | * With replication, this path can be hit in a corner | |
1268 | * case when two OVSDB servers are set up to replicate | |
1269 | * each other. Not that is a useful set up, but can | |
1270 | * happen in practice. | |
1271 | * | |
1272 | * An example of how this path can be hit is documented below. | |
1273 | * The details is not as important to the correctness of the | |
1274 | * logic, but added here to convince ourselves that this path | |
1275 | * can be hit. | |
1276 | * | |
1277 | * Imagine two OVSDB servers that replicates from each | |
1278 | * other. For each replication session, there is a | |
1279 | * corresponding monitor at the other end of the replication | |
1280 | * JSONRPC connection. | |
1281 | * | |
1282 | * The events can lead to a back to back deletion and | |
1283 | * insertion operation of the same row for the monitor of | |
1284 | * the first server are: | |
1285 | * | |
1286 | * 1. A row is inserted in the first OVSDB server. | |
1287 | * 2. The row is then replicated to the remote OVSDB server. | |
1288 | * 3. The row is now deleted by the local OVSDB server. This | |
1289 | * deletion operation is replicated to the local monitor | |
1290 | * of the OVSDB server. | |
1291 | * 4. The monitor now receives the same row, as an insertion, | |
1292 | * from the replication server. Because of | |
1293 | * replication, the row carries the same UUID as the row | |
1294 | * just deleted. | |
1295 | */ | |
e0f42d4a HZ |
1296 | change->new = clone_monitor_row_data(mt, new, |
1297 | changes->n_columns); | |
20853442 | 1298 | } else { |
e0f42d4a HZ |
1299 | update_monitor_row_data(mt, new, change->new, |
1300 | changes->n_columns); | |
20853442 | 1301 | } |
2fa1df7b | 1302 | } else { |
e0f42d4a | 1303 | free_monitor_row_data(mt, change->new, changes->n_columns); |
2fa1df7b AZ |
1304 | change->new = NULL; |
1305 | ||
1306 | if (!change->old) { | |
1307 | /* This row was added then deleted. Forget about it. */ | |
7e911055 | 1308 | hmap_remove(&changes->rows, &change->hmap_node); |
2fa1df7b AZ |
1309 | free(change); |
1310 | } | |
1311 | } | |
1312 | } | |
7e911055 AZ |
1313 | } |
1314 | ||
58de87cc AZ |
1315 | static bool |
1316 | ovsdb_monitor_columns_changed(const struct ovsdb_monitor_table *mt, | |
1317 | const unsigned long int *changed) | |
1318 | { | |
1319 | size_t i; | |
1320 | ||
1321 | for (i = 0; i < mt->n_columns; i++) { | |
1322 | size_t column_index = mt->columns[i].column->index; | |
1323 | ||
1324 | if (bitmap_is_set(changed, column_index)) { | |
1325 | return true; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | return false; | |
1330 | } | |
1331 | ||
1332 | /* Return the efficacy of a row's change to a monitor table. | |
1333 | * | |
1334 | * Please see the block comment above 'ovsdb_monitor_changes_efficacy' | |
1335 | * definition form more information. */ | |
1336 | static enum ovsdb_monitor_changes_efficacy | |
1337 | ovsdb_monitor_changes_classify(enum ovsdb_monitor_selection type, | |
1338 | const struct ovsdb_monitor_table *mt, | |
1339 | const unsigned long int *changed) | |
1340 | { | |
1341 | if (type == OJMS_MODIFY && | |
1342 | !ovsdb_monitor_columns_changed(mt, changed)) { | |
1343 | return OVSDB_CHANGES_NO_EFFECT; | |
1344 | } | |
1345 | ||
71cdf7cd LS |
1346 | if (type == OJMS_MODIFY) { |
1347 | /* Condition might turn a modify operation to insert or delete */ | |
1348 | type |= OJMS_INSERT | OJMS_DELETE; | |
1349 | } | |
1350 | ||
58de87cc AZ |
1351 | return (mt->select & type) |
1352 | ? OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE | |
1353 | : OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE; | |
1354 | } | |
1355 | ||
7e911055 AZ |
1356 | static bool |
1357 | ovsdb_monitor_change_cb(const struct ovsdb_row *old, | |
1358 | const struct ovsdb_row *new, | |
3a22387b | 1359 | const unsigned long int *changed, |
7e911055 AZ |
1360 | void *aux_) |
1361 | { | |
1362 | struct ovsdb_monitor_aux *aux = aux_; | |
1363 | const struct ovsdb_monitor *m = aux->monitor; | |
1364 | struct ovsdb_table *table = new ? new->table : old->table; | |
1365 | struct ovsdb_monitor_table *mt; | |
1366 | struct ovsdb_monitor_changes *changes; | |
1367 | ||
1368 | if (!aux->mt || table != aux->mt->table) { | |
1369 | aux->mt = shash_find_data(&m->tables, table->schema->name); | |
1370 | if (!aux->mt) { | |
1371 | /* We don't care about rows in this table at all. Tell the caller | |
1372 | * to skip it. */ | |
1373 | return false; | |
1374 | } | |
1375 | } | |
1376 | mt = aux->mt; | |
1377 | ||
71cdf7cd LS |
1378 | enum ovsdb_monitor_selection type = |
1379 | ovsdb_monitor_row_update_type(false, old, new); | |
1380 | enum ovsdb_monitor_changes_efficacy efficacy = | |
1381 | ovsdb_monitor_changes_classify(type, mt, changed); | |
58de87cc | 1382 | |
71cdf7cd | 1383 | HMAP_FOR_EACH(changes, hmap_node, &mt->changes) { |
58de87cc AZ |
1384 | if (efficacy > OVSDB_CHANGES_NO_EFFECT) { |
1385 | ovsdb_monitor_changes_update(old, new, mt, changes); | |
1386 | } | |
71cdf7cd LS |
1387 | } |
1388 | if (aux->efficacy < efficacy) { | |
1389 | aux->efficacy = efficacy; | |
7e911055 | 1390 | } |
58de87cc | 1391 | |
2fa1df7b AZ |
1392 | return true; |
1393 | } | |
1394 | ||
61b63013 | 1395 | void |
2fa1df7b AZ |
1396 | ovsdb_monitor_get_initial(const struct ovsdb_monitor *dbmon) |
1397 | { | |
2fa1df7b | 1398 | struct shash_node *node; |
2fa1df7b | 1399 | |
2fa1df7b AZ |
1400 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1401 | struct ovsdb_monitor_table *mt = node->data; | |
1402 | ||
1403 | if (mt->select & OJMS_INITIAL) { | |
1404 | struct ovsdb_row *row; | |
6e5a9216 | 1405 | struct ovsdb_monitor_changes *changes; |
2fa1df7b | 1406 | |
6e5a9216 AZ |
1407 | changes = ovsdb_monitor_table_find_changes(mt, 0); |
1408 | if (!changes) { | |
1409 | changes = ovsdb_monitor_table_add_changes(mt, 0); | |
1410 | HMAP_FOR_EACH (row, hmap_node, &mt->table->rows) { | |
1411 | ovsdb_monitor_changes_update(NULL, row, mt, changes); | |
1412 | } | |
1413 | } else { | |
1414 | changes->n_refs++; | |
2fa1df7b AZ |
1415 | } |
1416 | } | |
1417 | } | |
2fa1df7b AZ |
1418 | } |
1419 | ||
1420 | void | |
d9412837 | 1421 | ovsdb_monitor_remove_jsonrpc_monitor(struct ovsdb_monitor *dbmon, |
f76def25 AZ |
1422 | struct ovsdb_jsonrpc_monitor *jsonrpc_monitor, |
1423 | uint64_t unflushed) | |
d9412837 AZ |
1424 | { |
1425 | struct jsonrpc_monitor_node *jm; | |
1426 | ||
417e7e66 | 1427 | if (ovs_list_is_empty(&dbmon->jsonrpc_monitors)) { |
6e5a9216 AZ |
1428 | ovsdb_monitor_destroy(dbmon); |
1429 | return; | |
1430 | } | |
1431 | ||
d9412837 AZ |
1432 | /* Find and remove the jsonrpc monitor from the list. */ |
1433 | LIST_FOR_EACH(jm, node, &dbmon->jsonrpc_monitors) { | |
1434 | if (jm->jsonrpc_monitor == jsonrpc_monitor) { | |
f76def25 AZ |
1435 | /* Release the tracked changes. */ |
1436 | struct shash_node *node; | |
1437 | SHASH_FOR_EACH (node, &dbmon->tables) { | |
1438 | struct ovsdb_monitor_table *mt = node->data; | |
1439 | ovsdb_monitor_table_untrack_changes(mt, unflushed); | |
1440 | } | |
417e7e66 | 1441 | ovs_list_remove(&jm->node); |
d9412837 AZ |
1442 | free(jm); |
1443 | ||
1444 | /* Destroy ovsdb monitor if this is the last user. */ | |
417e7e66 | 1445 | if (ovs_list_is_empty(&dbmon->jsonrpc_monitors)) { |
d9412837 AZ |
1446 | ovsdb_monitor_destroy(dbmon); |
1447 | } | |
1448 | ||
1449 | return; | |
1450 | }; | |
1451 | } | |
1452 | ||
1453 | /* Should never reach here. jsonrpc_monitor should be on the list. */ | |
1454 | OVS_NOT_REACHED(); | |
1455 | } | |
1456 | ||
6e5a9216 AZ |
1457 | static bool |
1458 | ovsdb_monitor_table_equal(const struct ovsdb_monitor_table *a, | |
1459 | const struct ovsdb_monitor_table *b) | |
1460 | { | |
1461 | size_t i; | |
1462 | ||
6150a75f LS |
1463 | ovs_assert(b->n_columns == b->n_monitored_columns); |
1464 | ||
6e5a9216 AZ |
1465 | if ((a->table != b->table) || |
1466 | (a->select != b->select) || | |
6150a75f | 1467 | (a->n_monitored_columns != b->n_monitored_columns)) { |
6e5a9216 AZ |
1468 | return false; |
1469 | } | |
1470 | ||
6150a75f LS |
1471 | /* Compare only monitored columns that must be sorted already */ |
1472 | for (i = 0; i < a->n_monitored_columns; i++) { | |
6e5a9216 AZ |
1473 | if ((a->columns[i].column != b->columns[i].column) || |
1474 | (a->columns[i].select != b->columns[i].select)) { | |
1475 | return false; | |
1476 | } | |
1477 | } | |
6e5a9216 AZ |
1478 | return true; |
1479 | } | |
1480 | ||
1481 | static bool | |
1482 | ovsdb_monitor_equal(const struct ovsdb_monitor *a, | |
1483 | const struct ovsdb_monitor *b) | |
1484 | { | |
1485 | struct shash_node *node; | |
1486 | ||
1487 | if (shash_count(&a->tables) != shash_count(&b->tables)) { | |
1488 | return false; | |
1489 | } | |
1490 | ||
1491 | SHASH_FOR_EACH(node, &a->tables) { | |
1492 | const struct ovsdb_monitor_table *mta = node->data; | |
1493 | const struct ovsdb_monitor_table *mtb; | |
1494 | ||
1495 | mtb = shash_find_data(&b->tables, node->name); | |
1496 | if (!mtb) { | |
1497 | return false; | |
1498 | } | |
1499 | ||
1500 | if (!ovsdb_monitor_table_equal(mta, mtb)) { | |
1501 | return false; | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | return true; | |
1506 | } | |
1507 | ||
1508 | static size_t | |
1509 | ovsdb_monitor_hash(const struct ovsdb_monitor *dbmon, size_t basis) | |
1510 | { | |
1511 | const struct shash_node **nodes; | |
1512 | size_t i, j, n; | |
1513 | ||
1514 | nodes = shash_sort(&dbmon->tables); | |
1515 | n = shash_count(&dbmon->tables); | |
1516 | ||
1517 | for (i = 0; i < n; i++) { | |
1518 | struct ovsdb_monitor_table *mt = nodes[i]->data; | |
1519 | ||
1520 | basis = hash_pointer(mt->table, basis); | |
1521 | basis = hash_3words(mt->select, mt->n_columns, basis); | |
1522 | ||
1523 | for (j = 0; j < mt->n_columns; j++) { | |
1524 | basis = hash_pointer(mt->columns[j].column, basis); | |
1525 | basis = hash_2words(mt->columns[j].select, basis); | |
1526 | } | |
1527 | } | |
1528 | free(nodes); | |
1529 | ||
1530 | return basis; | |
1531 | } | |
1532 | ||
1533 | struct ovsdb_monitor * | |
1534 | ovsdb_monitor_add(struct ovsdb_monitor *new_dbmon) | |
1535 | { | |
1536 | struct ovsdb_monitor *dbmon; | |
1537 | size_t hash; | |
1538 | ||
1539 | /* New_dbmon should be associated with only one jsonrpc | |
1540 | * connections. */ | |
417e7e66 | 1541 | ovs_assert(ovs_list_is_singleton(&new_dbmon->jsonrpc_monitors)); |
6e5a9216 | 1542 | |
ec1eadce LS |
1543 | ovsdb_monitor_columns_sort(new_dbmon); |
1544 | ||
6e5a9216 AZ |
1545 | hash = ovsdb_monitor_hash(new_dbmon, 0); |
1546 | HMAP_FOR_EACH_WITH_HASH(dbmon, hmap_node, hash, &ovsdb_monitors) { | |
1547 | if (ovsdb_monitor_equal(dbmon, new_dbmon)) { | |
1548 | return dbmon; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | hmap_insert(&ovsdb_monitors, &new_dbmon->hmap_node, hash); | |
1553 | return new_dbmon; | |
1554 | } | |
1555 | ||
d9412837 | 1556 | static void |
2fa1df7b AZ |
1557 | ovsdb_monitor_destroy(struct ovsdb_monitor *dbmon) |
1558 | { | |
1559 | struct shash_node *node; | |
1560 | ||
009bf21f | 1561 | ovs_list_remove(&dbmon->list_node); |
2fa1df7b | 1562 | |
6e5a9216 AZ |
1563 | if (!hmap_node_is_null(&dbmon->hmap_node)) { |
1564 | hmap_remove(&ovsdb_monitors, &dbmon->hmap_node); | |
1565 | } | |
1566 | ||
4c280978 AZ |
1567 | ovsdb_monitor_json_cache_flush(dbmon); |
1568 | hmap_destroy(&dbmon->json_cache); | |
1569 | ||
2fa1df7b AZ |
1570 | SHASH_FOR_EACH (node, &dbmon->tables) { |
1571 | struct ovsdb_monitor_table *mt = node->data; | |
7e911055 | 1572 | struct ovsdb_monitor_changes *changes, *next; |
2fa1df7b | 1573 | |
7e911055 AZ |
1574 | HMAP_FOR_EACH_SAFE (changes, next, hmap_node, &mt->changes) { |
1575 | hmap_remove(&mt->changes, &changes->hmap_node); | |
1576 | ovsdb_monitor_changes_destroy(changes); | |
1577 | } | |
a7ca2803 | 1578 | hmap_destroy(&mt->changes); |
2fa1df7b | 1579 | free(mt->columns); |
ec1eadce | 1580 | free(mt->columns_index_map); |
2fa1df7b AZ |
1581 | free(mt); |
1582 | } | |
1583 | shash_destroy(&dbmon->tables); | |
1584 | free(dbmon); | |
1585 | } | |
1586 | ||
120fb2ca | 1587 | static void |
009bf21f | 1588 | ovsdb_monitor_commit(struct ovsdb_monitor *m, const struct ovsdb_txn *txn) |
2fa1df7b | 1589 | { |
2fa1df7b AZ |
1590 | struct ovsdb_monitor_aux aux; |
1591 | ||
1592 | ovsdb_monitor_init_aux(&aux, m); | |
5e229177 AZ |
1593 | /* Update ovsdb_monitor's transaction number for |
1594 | * each transaction, before calling ovsdb_monitor_change_cb(). */ | |
1595 | m->n_transactions++; | |
2fa1df7b | 1596 | ovsdb_txn_for_each_change(txn, ovsdb_monitor_change_cb, &aux); |
a0cba5c2 | 1597 | |
5e229177 AZ |
1598 | switch(aux.efficacy) { |
1599 | case OVSDB_CHANGES_NO_EFFECT: | |
1600 | /* The transaction is ignored by the monitor. | |
1601 | * Roll back the 'n_transactions' as if the transaction | |
1602 | * has never happened. */ | |
1603 | m->n_transactions--; | |
1604 | break; | |
1605 | case OVSDB_CHANGES_REQUIRE_INTERNAL_UPDATE: | |
1606 | /* Nothing. */ | |
1607 | break; | |
1608 | case OVSDB_CHANGES_REQUIRE_EXTERNAL_UPDATE: | |
a0cba5c2 | 1609 | ovsdb_monitor_json_cache_flush(m); |
5e229177 | 1610 | break; |
a0cba5c2 | 1611 | } |
2fa1df7b AZ |
1612 | } |
1613 | ||
009bf21f BP |
1614 | void |
1615 | ovsdb_monitors_commit(struct ovsdb *db, const struct ovsdb_txn *txn) | |
2fa1df7b | 1616 | { |
009bf21f | 1617 | struct ovsdb_monitor *m; |
2fa1df7b | 1618 | |
009bf21f BP |
1619 | LIST_FOR_EACH (m, list_node, &db->monitors) { |
1620 | ovsdb_monitor_commit(m, txn); | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | void | |
1625 | ovsdb_monitors_remove(struct ovsdb *db) | |
1626 | { | |
1627 | struct ovsdb_monitor *m, *next_m; | |
1628 | ||
1629 | LIST_FOR_EACH_SAFE (m, next_m, list_node, &db->monitors) { | |
1630 | struct jsonrpc_monitor_node *jm, *next_jm; | |
1631 | ||
1632 | /* Delete all front-end monitors. Removing the last front-end monitor | |
1633 | * will also destroy the corresponding ovsdb_monitor. */ | |
1634 | LIST_FOR_EACH_SAFE (jm, next_jm, node, &m->jsonrpc_monitors) { | |
53178986 | 1635 | ovsdb_jsonrpc_monitor_destroy(jm->jsonrpc_monitor, false); |
009bf21f | 1636 | } |
d9412837 | 1637 | } |
2fa1df7b AZ |
1638 | } |
1639 | ||
e0c73ed1 AZ |
1640 | /* Add some memory usage statics for monitors into 'usage', for use with |
1641 | * memory_report(). */ | |
1642 | void | |
1643 | ovsdb_monitor_get_memory_usage(struct simap *usage) | |
1644 | { | |
8302b6d1 | 1645 | struct ovsdb_monitor *dbmon; |
e0c73ed1 | 1646 | simap_put(usage, "monitors", hmap_count(&ovsdb_monitors)); |
8302b6d1 AZ |
1647 | |
1648 | HMAP_FOR_EACH(dbmon, hmap_node, &ovsdb_monitors) { | |
1649 | simap_increase(usage, "json-caches", hmap_count(&dbmon->json_cache)); | |
1650 | } | |
e0c73ed1 | 1651 | } |
53178986 BP |
1652 | |
1653 | void | |
1654 | ovsdb_monitor_prereplace_db(struct ovsdb *db) | |
1655 | { | |
1656 | struct ovsdb_monitor *m, *next_m; | |
1657 | ||
1658 | LIST_FOR_EACH_SAFE (m, next_m, list_node, &db->monitors) { | |
1659 | struct jsonrpc_monitor_node *jm, *next_jm; | |
1660 | ||
1661 | /* Delete all front-end monitors. Removing the last front-end monitor | |
1662 | * will also destroy the corresponding ovsdb_monitor. */ | |
1663 | LIST_FOR_EACH_SAFE (jm, next_jm, node, &m->jsonrpc_monitors) { | |
1664 | ovsdb_jsonrpc_monitor_destroy(jm->jsonrpc_monitor, true); | |
1665 | } | |
1666 | } | |
1667 | } |