1 /* Copyright (c) 2009, 2010 Nicira Networks
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 #include "jsonrpc-server.h"
27 #include "ovsdb-error.h"
28 #include "ovsdb-parser.h"
30 #include "reconnect.h"
35 #include "transaction.h"
38 #define THIS_MODULE VLM_ovsdb_jsonrpc_server
41 struct ovsdb_jsonrpc_remote;
42 struct ovsdb_jsonrpc_session;
44 /* Message rate-limiting. */
45 struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
48 static struct ovsdb_jsonrpc_session *ovsdb_jsonrpc_session_create(
49 struct ovsdb_jsonrpc_remote *, struct jsonrpc_session *);
50 static void ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *);
51 static void ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *);
52 static void ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *);
55 static void ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *,
56 struct json *id, struct json *params);
57 static struct ovsdb_jsonrpc_trigger *ovsdb_jsonrpc_trigger_find(
58 struct ovsdb_jsonrpc_session *, const struct json *id, size_t hash);
59 static void ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *);
60 static void ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *);
61 static void ovsdb_jsonrpc_trigger_complete_done(
62 struct ovsdb_jsonrpc_session *);
65 static struct json *ovsdb_jsonrpc_monitor_create(
66 struct ovsdb_jsonrpc_session *, struct json *params);
67 static struct jsonrpc_msg *ovsdb_jsonrpc_monitor_cancel(
68 struct ovsdb_jsonrpc_session *,
69 struct json_array *params,
70 const struct json *request_id);
71 static void ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *);
73 /* JSON-RPC database server. */
75 struct ovsdb_jsonrpc_server {
77 unsigned int n_sessions, max_sessions;
78 struct shash remotes; /* Contains "struct ovsdb_jsonrpc_remote *"s. */
81 /* A configured remote. This is either a passive stream listener plus a list
82 * of the currently connected sessions, or a list of exactly one active
84 struct ovsdb_jsonrpc_remote {
85 struct ovsdb_jsonrpc_server *server;
86 struct pstream *listener; /* Listener, if passive. */
87 struct list sessions; /* List of "struct ovsdb_jsonrpc_session"s. */
90 static void ovsdb_jsonrpc_server_add_remote(struct ovsdb_jsonrpc_server *,
92 static void ovsdb_jsonrpc_server_del_remote(struct shash_node *);
94 struct ovsdb_jsonrpc_server *
95 ovsdb_jsonrpc_server_create(struct ovsdb *db)
97 struct ovsdb_jsonrpc_server *server = xzalloc(sizeof *server);
99 server->max_sessions = 64;
100 shash_init(&server->remotes);
105 ovsdb_jsonrpc_server_destroy(struct ovsdb_jsonrpc_server *svr)
107 struct shash_node *node, *next;
109 SHASH_FOR_EACH_SAFE (node, next, &svr->remotes) {
110 ovsdb_jsonrpc_server_del_remote(node);
112 shash_destroy(&svr->remotes);
116 /* Sets 'svr''s current set of remotes to the names in 'new_remotes'. The data
117 * values in 'new_remotes' are ignored.
119 * A remote is an active or passive stream connection method, e.g. "pssl:" or
122 ovsdb_jsonrpc_server_set_remotes(struct ovsdb_jsonrpc_server *svr,
123 const struct shash *new_remotes)
125 struct shash_node *node, *next;
127 SHASH_FOR_EACH_SAFE (node, next, &svr->remotes) {
128 if (!shash_find(new_remotes, node->name)) {
129 ovsdb_jsonrpc_server_del_remote(node);
132 SHASH_FOR_EACH (node, new_remotes) {
133 if (!shash_find(&svr->remotes, node->name)) {
134 ovsdb_jsonrpc_server_add_remote(svr, node->name);
140 ovsdb_jsonrpc_server_add_remote(struct ovsdb_jsonrpc_server *svr,
143 struct ovsdb_jsonrpc_remote *remote;
144 struct pstream *listener;
147 error = jsonrpc_pstream_open(name, &listener);
148 if (error && error != EAFNOSUPPORT) {
149 VLOG_ERR_RL(&rl, "%s: listen failed: %s", name, strerror(error));
153 remote = xmalloc(sizeof *remote);
154 remote->server = svr;
155 remote->listener = listener;
156 list_init(&remote->sessions);
157 shash_add(&svr->remotes, name, remote);
160 ovsdb_jsonrpc_session_create(remote, jsonrpc_session_open(name));
165 ovsdb_jsonrpc_server_del_remote(struct shash_node *node)
167 struct ovsdb_jsonrpc_remote *remote = node->data;
169 ovsdb_jsonrpc_session_close_all(remote);
170 pstream_close(remote->listener);
171 shash_delete(&remote->server->remotes, node);
176 ovsdb_jsonrpc_server_run(struct ovsdb_jsonrpc_server *svr)
178 struct shash_node *node;
180 SHASH_FOR_EACH (node, &svr->remotes) {
181 struct ovsdb_jsonrpc_remote *remote = node->data;
183 if (remote->listener && svr->n_sessions < svr->max_sessions) {
184 struct stream *stream;
187 error = pstream_accept(remote->listener, &stream);
189 struct jsonrpc_session *js;
190 js = jsonrpc_session_open_unreliably(jsonrpc_open(stream));
191 ovsdb_jsonrpc_session_create(remote, js);
192 } else if (error != EAGAIN) {
193 VLOG_WARN_RL(&rl, "%s: accept failed: %s",
194 pstream_get_name(remote->listener),
199 ovsdb_jsonrpc_session_run_all(remote);
204 ovsdb_jsonrpc_server_wait(struct ovsdb_jsonrpc_server *svr)
206 struct shash_node *node;
208 SHASH_FOR_EACH (node, &svr->remotes) {
209 struct ovsdb_jsonrpc_remote *remote = node->data;
211 if (remote->listener && svr->n_sessions < svr->max_sessions) {
212 pstream_wait(remote->listener);
215 ovsdb_jsonrpc_session_wait_all(remote);
219 /* JSON-RPC database server session. */
221 struct ovsdb_jsonrpc_session {
222 struct ovsdb_jsonrpc_remote *remote;
223 struct list node; /* Element in remote's sessions list. */
226 struct hmap triggers; /* Hmap of "struct ovsdb_jsonrpc_trigger"s. */
227 struct list completions; /* Completed triggers. */
230 struct hmap monitors; /* Hmap of "struct ovsdb_jsonrpc_monitor"s. */
232 /* Network connectivity. */
233 struct jsonrpc_session *js; /* JSON-RPC session. */
234 unsigned int js_seqno; /* Last jsonrpc_session_get_seqno() value. */
237 static void ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *);
238 static int ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *);
239 static void ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *);
240 static void ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *,
241 struct jsonrpc_msg *);
242 static void ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *,
243 struct jsonrpc_msg *);
245 static struct ovsdb_jsonrpc_session *
246 ovsdb_jsonrpc_session_create(struct ovsdb_jsonrpc_remote *remote,
247 struct jsonrpc_session *js)
249 struct ovsdb_jsonrpc_session *s;
251 s = xzalloc(sizeof *s);
253 list_push_back(&remote->sessions, &s->node);
254 hmap_init(&s->triggers);
255 hmap_init(&s->monitors);
256 list_init(&s->completions);
258 s->js_seqno = jsonrpc_session_get_seqno(js);
260 remote->server->n_sessions++;
266 ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *s)
268 ovsdb_jsonrpc_monitor_remove_all(s);
269 jsonrpc_session_close(s->js);
270 list_remove(&s->node);
271 s->remote->server->n_sessions--;
276 ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *s)
278 jsonrpc_session_run(s->js);
279 if (s->js_seqno != jsonrpc_session_get_seqno(s->js)) {
280 s->js_seqno = jsonrpc_session_get_seqno(s->js);
281 ovsdb_jsonrpc_trigger_complete_all(s);
282 ovsdb_jsonrpc_monitor_remove_all(s);
285 ovsdb_jsonrpc_trigger_complete_done(s);
287 if (!jsonrpc_session_get_backlog(s->js)) {
288 struct jsonrpc_msg *msg = jsonrpc_session_recv(s->js);
290 if (msg->type == JSONRPC_REQUEST) {
291 ovsdb_jsonrpc_session_got_request(s, msg);
292 } else if (msg->type == JSONRPC_NOTIFY) {
293 ovsdb_jsonrpc_session_got_notify(s, msg);
295 VLOG_WARN("%s: received unexpected %s message",
296 jsonrpc_session_get_name(s->js),
297 jsonrpc_msg_type_to_string(msg->type));
298 jsonrpc_session_force_reconnect(s->js);
299 jsonrpc_msg_destroy(msg);
303 return jsonrpc_session_is_alive(s->js) ? 0 : ETIMEDOUT;
307 ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *remote)
309 struct ovsdb_jsonrpc_session *s, *next;
311 LIST_FOR_EACH_SAFE (s, next, struct ovsdb_jsonrpc_session, node,
313 int error = ovsdb_jsonrpc_session_run(s);
315 ovsdb_jsonrpc_session_close(s);
321 ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *s)
323 jsonrpc_session_wait(s->js);
324 if (!jsonrpc_session_get_backlog(s->js)) {
325 jsonrpc_session_recv_wait(s->js);
330 ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *remote)
332 struct ovsdb_jsonrpc_session *s;
334 LIST_FOR_EACH (s, struct ovsdb_jsonrpc_session, node, &remote->sessions) {
335 ovsdb_jsonrpc_session_wait(s);
340 ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *remote)
342 struct ovsdb_jsonrpc_session *s, *next;
344 LIST_FOR_EACH_SAFE (s, next, struct ovsdb_jsonrpc_session, node,
346 ovsdb_jsonrpc_session_close(s);
351 get_db_name(const struct ovsdb_jsonrpc_session *s)
353 return s->remote->server->db->schema->name;
356 static struct jsonrpc_msg *
357 ovsdb_jsonrpc_check_db_name(const struct ovsdb_jsonrpc_session *s,
358 const struct jsonrpc_msg *request)
360 struct json_array *params;
361 const char *want_db_name;
362 const char *have_db_name;
363 struct ovsdb_error *error;
364 struct jsonrpc_msg *reply;
366 params = json_array(request->params);
367 if (!params->n || params->elems[0]->type != JSON_STRING) {
368 error = ovsdb_syntax_error(
369 request->params, NULL,
370 "%s request params must begin with <db-name>", request->method);
374 want_db_name = params->elems[0]->u.string;
375 have_db_name = get_db_name(s);
376 if (strcmp(want_db_name, have_db_name)) {
377 error = ovsdb_syntax_error(
378 request->params, "unknown database",
379 "%s request specifies unknown database %s",
380 request->method, want_db_name);
387 reply = jsonrpc_create_reply(ovsdb_error_to_json(error), request->id);
388 ovsdb_error_destroy(error);
392 static struct jsonrpc_msg *
393 execute_transaction(struct ovsdb_jsonrpc_session *s,
394 struct jsonrpc_msg *request)
396 ovsdb_jsonrpc_trigger_create(s, request->id, request->params);
398 request->params = NULL;
399 jsonrpc_msg_destroy(request);
404 ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *s,
405 struct jsonrpc_msg *request)
407 struct jsonrpc_msg *reply;
409 if (!strcmp(request->method, "transact")) {
410 reply = ovsdb_jsonrpc_check_db_name(s, request);
412 reply = execute_transaction(s, request);
414 } else if (!strcmp(request->method, "monitor")) {
415 reply = ovsdb_jsonrpc_check_db_name(s, request);
417 reply = jsonrpc_create_reply(
418 ovsdb_jsonrpc_monitor_create(s, request->params), request->id);
420 } else if (!strcmp(request->method, "monitor_cancel")) {
421 reply = ovsdb_jsonrpc_monitor_cancel(s, json_array(request->params),
423 } else if (!strcmp(request->method, "get_schema")) {
424 reply = ovsdb_jsonrpc_check_db_name(s, request);
426 reply = jsonrpc_create_reply(
427 ovsdb_schema_to_json(s->remote->server->db->schema),
430 } else if (!strcmp(request->method, "list_dbs")) {
431 reply = jsonrpc_create_reply(
432 json_array_create_1(json_string_create(get_db_name(s))),
434 } else if (!strcmp(request->method, "echo")) {
435 reply = jsonrpc_create_reply(json_clone(request->params), request->id);
437 reply = jsonrpc_create_error(json_string_create("unknown method"),
442 jsonrpc_msg_destroy(request);
443 jsonrpc_session_send(s->js, reply);
448 execute_cancel(struct ovsdb_jsonrpc_session *s, struct jsonrpc_msg *request)
450 if (json_array(request->params)->n == 1) {
451 struct ovsdb_jsonrpc_trigger *t;
454 id = request->params->u.array.elems[0];
455 t = ovsdb_jsonrpc_trigger_find(s, id, json_hash(id, 0));
457 ovsdb_jsonrpc_trigger_complete(t);
463 ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *s,
464 struct jsonrpc_msg *request)
466 if (!strcmp(request->method, "cancel")) {
467 execute_cancel(s, request);
469 jsonrpc_msg_destroy(request);
472 /* JSON-RPC database server triggers.
474 * (Every transaction is treated as a trigger even if it doesn't actually have
475 * any "wait" operations.) */
477 struct ovsdb_jsonrpc_trigger {
478 struct ovsdb_trigger trigger;
479 struct ovsdb_jsonrpc_session *session;
480 struct hmap_node hmap_node; /* In session's "triggers" hmap. */
485 ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *s,
486 struct json *id, struct json *params)
488 struct ovsdb_jsonrpc_trigger *t;
491 /* Check for duplicate ID. */
492 hash = json_hash(id, 0);
493 t = ovsdb_jsonrpc_trigger_find(s, id, hash);
495 struct jsonrpc_msg *msg;
497 msg = jsonrpc_create_error(json_string_create("duplicate request ID"),
499 jsonrpc_session_send(s->js, msg);
501 json_destroy(params);
505 /* Insert into trigger table. */
506 t = xmalloc(sizeof *t);
507 ovsdb_trigger_init(s->remote->server->db,
508 &t->trigger, params, &s->completions,
512 hmap_insert(&s->triggers, &t->hmap_node, hash);
514 /* Complete early if possible. */
515 if (ovsdb_trigger_is_complete(&t->trigger)) {
516 ovsdb_jsonrpc_trigger_complete(t);
520 static struct ovsdb_jsonrpc_trigger *
521 ovsdb_jsonrpc_trigger_find(struct ovsdb_jsonrpc_session *s,
522 const struct json *id, size_t hash)
524 struct ovsdb_jsonrpc_trigger *t;
526 HMAP_FOR_EACH_WITH_HASH (t, struct ovsdb_jsonrpc_trigger, hmap_node, hash,
528 if (json_equal(t->id, id)) {
537 ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *t)
539 struct ovsdb_jsonrpc_session *s = t->session;
541 if (jsonrpc_session_is_connected(s->js)) {
542 struct jsonrpc_msg *reply;
545 result = ovsdb_trigger_steal_result(&t->trigger);
547 reply = jsonrpc_create_reply(result, t->id);
549 reply = jsonrpc_create_error(json_string_create("canceled"),
552 jsonrpc_session_send(s->js, reply);
556 ovsdb_trigger_destroy(&t->trigger);
557 hmap_remove(&s->triggers, &t->hmap_node);
562 ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *s)
564 struct ovsdb_jsonrpc_trigger *t, *next;
565 HMAP_FOR_EACH_SAFE (t, next, struct ovsdb_jsonrpc_trigger, hmap_node,
567 ovsdb_jsonrpc_trigger_complete(t);
572 ovsdb_jsonrpc_trigger_complete_done(struct ovsdb_jsonrpc_session *s)
574 while (!list_is_empty(&s->completions)) {
575 struct ovsdb_jsonrpc_trigger *t
576 = CONTAINER_OF(s->completions.next,
577 struct ovsdb_jsonrpc_trigger, trigger.node);
578 ovsdb_jsonrpc_trigger_complete(t);
582 /* JSON-RPC database table monitors. */
584 enum ovsdb_jsonrpc_monitor_selection {
585 OJMS_INITIAL = 1 << 0, /* All rows when monitor is created. */
586 OJMS_INSERT = 1 << 1, /* New rows. */
587 OJMS_DELETE = 1 << 2, /* Deleted rows. */
588 OJMS_MODIFY = 1 << 3 /* Modified rows. */
591 struct ovsdb_jsonrpc_monitor_table {
592 const struct ovsdb_table *table;
593 enum ovsdb_jsonrpc_monitor_selection select;
594 struct ovsdb_column_set columns;
597 struct ovsdb_jsonrpc_monitor {
598 struct ovsdb_replica replica;
599 struct ovsdb_jsonrpc_session *session;
600 struct hmap_node node; /* In ovsdb_jsonrpc_session's "monitors". */
602 struct json *monitor_id;
603 struct shash tables; /* Holds "struct ovsdb_jsonrpc_monitor_table"s. */
606 static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class;
608 struct ovsdb_jsonrpc_monitor *ovsdb_jsonrpc_monitor_find(
609 struct ovsdb_jsonrpc_session *, const struct json *monitor_id);
610 static void ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *);
611 static struct json *ovsdb_jsonrpc_monitor_get_initial(
612 const struct ovsdb_jsonrpc_monitor *);
615 parse_bool(struct ovsdb_parser *parser, const char *name, bool default_value)
617 const struct json *json;
619 json = ovsdb_parser_member(parser, name, OP_BOOLEAN | OP_OPTIONAL);
620 return json ? json_boolean(json) : default_value;
623 struct ovsdb_jsonrpc_monitor *
624 ovsdb_jsonrpc_monitor_find(struct ovsdb_jsonrpc_session *s,
625 const struct json *monitor_id)
627 struct ovsdb_jsonrpc_monitor *m;
629 HMAP_FOR_EACH_WITH_HASH (m, struct ovsdb_jsonrpc_monitor, node,
630 json_hash(monitor_id, 0), &s->monitors) {
631 if (json_equal(m->monitor_id, monitor_id)) {
640 ovsdb_jsonrpc_monitor_create(struct ovsdb_jsonrpc_session *s,
643 struct ovsdb_jsonrpc_monitor *m = NULL;
644 struct json *monitor_id, *monitor_requests;
645 struct ovsdb_error *error = NULL;
646 struct shash_node *node;
649 if (json_array(params)->n != 3) {
650 error = ovsdb_syntax_error(params, NULL, "invalid parameters");
653 monitor_id = params->u.array.elems[1];
654 monitor_requests = params->u.array.elems[2];
655 if (monitor_requests->type != JSON_OBJECT) {
656 error = ovsdb_syntax_error(monitor_requests, NULL,
657 "monitor-requests must be object");
661 if (ovsdb_jsonrpc_monitor_find(s, monitor_id)) {
662 error = ovsdb_syntax_error(monitor_id, NULL, "duplicate monitor ID");
666 m = xzalloc(sizeof *m);
667 ovsdb_replica_init(&m->replica, &ovsdb_jsonrpc_replica_class);
668 ovsdb_add_replica(s->remote->server->db, &m->replica);
670 hmap_insert(&s->monitors, &m->node, json_hash(monitor_id, 0));
671 m->monitor_id = json_clone(monitor_id);
672 shash_init(&m->tables);
674 SHASH_FOR_EACH (node, json_object(monitor_requests)) {
675 const struct ovsdb_table *table;
676 struct ovsdb_jsonrpc_monitor_table *mt;
677 const struct json *columns_json, *select_json;
678 struct ovsdb_parser parser;
680 table = ovsdb_get_table(s->remote->server->db, node->name);
682 error = ovsdb_syntax_error(NULL, NULL,
683 "no table named %s", node->name);
687 mt = xzalloc(sizeof *mt);
689 mt->select = OJMS_INITIAL | OJMS_INSERT | OJMS_DELETE | OJMS_MODIFY;
690 ovsdb_column_set_init(&mt->columns);
691 shash_add(&m->tables, table->schema->name, mt);
693 ovsdb_parser_init(&parser, node->data, "table %s", node->name);
694 columns_json = ovsdb_parser_member(&parser, "columns",
695 OP_ARRAY | OP_OPTIONAL);
696 select_json = ovsdb_parser_member(&parser, "select",
697 OP_OBJECT | OP_OPTIONAL);
698 error = ovsdb_parser_finish(&parser);
704 error = ovsdb_column_set_from_json(columns_json, table,
710 struct shash_node *node;
712 SHASH_FOR_EACH (node, &table->schema->columns) {
713 const struct ovsdb_column *column = node->data;
714 if (column->index != OVSDB_COL_UUID) {
715 ovsdb_column_set_add(&mt->columns, column);
722 ovsdb_parser_init(&parser, select_json, "table %s select",
723 table->schema->name);
724 if (parse_bool(&parser, "initial", true)) {
725 mt->select |= OJMS_INITIAL;
727 if (parse_bool(&parser, "insert", true)) {
728 mt->select |= OJMS_INSERT;
730 if (parse_bool(&parser, "delete", true)) {
731 mt->select |= OJMS_DELETE;
733 if (parse_bool(&parser, "modify", true)) {
734 mt->select |= OJMS_MODIFY;
736 error = ovsdb_parser_finish(&parser);
743 return ovsdb_jsonrpc_monitor_get_initial(m);
747 ovsdb_remove_replica(s->remote->server->db, &m->replica);
750 json = ovsdb_error_to_json(error);
751 ovsdb_error_destroy(error);
755 static struct jsonrpc_msg *
756 ovsdb_jsonrpc_monitor_cancel(struct ovsdb_jsonrpc_session *s,
757 struct json_array *params,
758 const struct json *request_id)
760 if (params->n != 1) {
761 return jsonrpc_create_error(json_string_create("invalid parameters"),
764 struct ovsdb_jsonrpc_monitor *m;
766 m = ovsdb_jsonrpc_monitor_find(s, params->elems[0]);
768 return jsonrpc_create_error(json_string_create("unknown monitor"),
771 ovsdb_remove_replica(s->remote->server->db, &m->replica);
772 return jsonrpc_create_reply(json_object_create(), request_id);
778 ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *s)
780 struct ovsdb_jsonrpc_monitor *m, *next;
782 HMAP_FOR_EACH_SAFE (m, next,
783 struct ovsdb_jsonrpc_monitor, node, &s->monitors) {
784 ovsdb_remove_replica(s->remote->server->db, &m->replica);
788 static struct ovsdb_jsonrpc_monitor *
789 ovsdb_jsonrpc_monitor_cast(struct ovsdb_replica *replica)
791 assert(replica->class == &ovsdb_jsonrpc_replica_class);
792 return CONTAINER_OF(replica, struct ovsdb_jsonrpc_monitor, replica);
795 struct ovsdb_jsonrpc_monitor_aux {
796 bool initial; /* Sending initial contents of table? */
797 const struct ovsdb_jsonrpc_monitor *monitor;
798 struct json *json; /* JSON for the whole transaction. */
801 struct ovsdb_jsonrpc_monitor_table *mt;
802 struct json *table_json; /* JSON for table's transaction. */
806 ovsdb_jsonrpc_monitor_change_cb(const struct ovsdb_row *old,
807 const struct ovsdb_row *new,
808 const unsigned long int *changed,
811 struct ovsdb_jsonrpc_monitor_aux *aux = aux_;
812 const struct ovsdb_jsonrpc_monitor *m = aux->monitor;
813 struct ovsdb_table *table = new ? new->table : old->table;
814 enum ovsdb_jsonrpc_monitor_selection type;
815 struct json *old_json, *new_json;
816 struct json *row_json;
817 char uuid[UUID_LEN + 1];
821 if (!aux->mt || table != aux->mt->table) {
822 aux->mt = shash_find_data(&m->tables, table->schema->name);
823 aux->table_json = NULL;
825 /* We don't care about rows in this table at all. Tell the caller
831 type = (aux->initial ? OJMS_INITIAL
835 if (!(aux->mt->select & type)) {
836 /* We don't care about this type of change (but do want to be called
837 * back for changes to other rows in the same table). */
841 old_json = new_json = NULL;
843 for (i = 0; i < aux->mt->columns.n_columns; i++) {
844 const struct ovsdb_column *column = aux->mt->columns.columns[i];
845 unsigned int idx = column->index;
846 bool column_changed = false;
848 if (type == OJMS_MODIFY) {
849 column_changed = bitmap_is_set(changed, idx);
850 n_changed += column_changed;
852 if (column_changed || type == OJMS_DELETE) {
854 old_json = json_object_create();
856 json_object_put(old_json, column->name,
857 ovsdb_datum_to_json(&old->fields[idx],
860 if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) {
862 new_json = json_object_create();
864 json_object_put(new_json, column->name,
865 ovsdb_datum_to_json(&new->fields[idx],
869 if ((type == OJMS_MODIFY && !n_changed) || (!old_json && !new_json)) {
870 /* No reportable changes. */
871 json_destroy(old_json);
872 json_destroy(new_json);
876 /* Create JSON object for transaction overall. */
878 aux->json = json_object_create();
881 /* Create JSON object for transaction on this table. */
882 if (!aux->table_json) {
883 aux->table_json = json_object_create();
884 json_object_put(aux->json, aux->mt->table->schema->name,
888 /* Create JSON object for transaction on this row. */
889 row_json = json_object_create();
891 json_object_put(row_json, "old", old_json);
894 json_object_put(row_json, "new", new_json);
897 /* Add JSON row to JSON table. */
898 snprintf(uuid, sizeof uuid,
899 UUID_FMT, UUID_ARGS(ovsdb_row_get_uuid(new ? new : old)));
900 json_object_put(aux->table_json, uuid, row_json);
906 ovsdb_jsonrpc_monitor_init_aux(struct ovsdb_jsonrpc_monitor_aux *aux,
907 const struct ovsdb_jsonrpc_monitor *m,
910 aux->initial = initial;
914 aux->table_json = NULL;
917 static struct ovsdb_error *
918 ovsdb_jsonrpc_monitor_commit(struct ovsdb_replica *replica,
919 const struct ovsdb_txn *txn,
920 bool durable OVS_UNUSED)
922 struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
923 struct ovsdb_jsonrpc_monitor_aux aux;
925 ovsdb_jsonrpc_monitor_init_aux(&aux, m, false);
926 ovsdb_txn_for_each_change(txn, ovsdb_jsonrpc_monitor_change_cb, &aux);
928 struct jsonrpc_msg *msg;
931 params = json_array_create_2(json_clone(aux.monitor->monitor_id),
933 msg = jsonrpc_create_notify("update", params);
934 jsonrpc_session_send(aux.monitor->session->js, msg);
941 ovsdb_jsonrpc_monitor_get_initial(const struct ovsdb_jsonrpc_monitor *m)
943 struct ovsdb_jsonrpc_monitor_aux aux;
944 struct shash_node *node;
946 ovsdb_jsonrpc_monitor_init_aux(&aux, m, true);
947 SHASH_FOR_EACH (node, &m->tables) {
948 struct ovsdb_jsonrpc_monitor_table *mt = node->data;
950 if (mt->select & OJMS_INITIAL) {
951 struct ovsdb_row *row;
953 HMAP_FOR_EACH (row, struct ovsdb_row, hmap_node,
955 ovsdb_jsonrpc_monitor_change_cb(NULL, row, NULL, &aux);
959 return aux.json ? aux.json : json_object_create();
963 ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *replica)
965 struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
966 struct shash_node *node;
968 json_destroy(m->monitor_id);
969 SHASH_FOR_EACH (node, &m->tables) {
970 struct ovsdb_jsonrpc_monitor_table *mt = node->data;
971 ovsdb_column_set_destroy(&mt->columns);
974 shash_destroy(&m->tables);
975 hmap_remove(&m->session->monitors, &m->node);
979 static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class = {
980 ovsdb_jsonrpc_monitor_commit,
981 ovsdb_jsonrpc_monitor_destroy