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"
25 #include "ovsdb-error.h"
26 #include "ovsdb-parser.h"
28 #include "reconnect.h"
33 #include "transaction.h"
36 #define THIS_MODULE VLM_ovsdb_jsonrpc_server
39 struct ovsdb_jsonrpc_remote;
40 struct ovsdb_jsonrpc_session;
42 /* Message rate-limiting. */
43 struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
46 static struct ovsdb_jsonrpc_session *ovsdb_jsonrpc_session_create(
47 struct ovsdb_jsonrpc_remote *, struct jsonrpc_session *);
48 static void ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *);
49 static void ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *);
50 static void ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *);
53 static void ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *,
54 struct json *id, struct json *params);
55 static struct ovsdb_jsonrpc_trigger *ovsdb_jsonrpc_trigger_find(
56 struct ovsdb_jsonrpc_session *, const struct json *id, size_t hash);
57 static void ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *);
58 static void ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *);
59 static void ovsdb_jsonrpc_trigger_complete_done(
60 struct ovsdb_jsonrpc_session *);
63 static struct json *ovsdb_jsonrpc_monitor_create(
64 struct ovsdb_jsonrpc_session *, struct json *params);
65 static struct jsonrpc_msg *ovsdb_jsonrpc_monitor_cancel(
66 struct ovsdb_jsonrpc_session *,
67 struct json_array *params,
68 const struct json *request_id);
69 static void ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *);
71 /* JSON-RPC database server. */
73 struct ovsdb_jsonrpc_server {
75 unsigned int n_sessions, max_sessions;
76 struct shash remotes; /* Contains "struct ovsdb_jsonrpc_remote *"s. */
79 /* A configured remote. This is either a passive stream listener plus a list
80 * of the currently connected sessions, or a list of exactly one active
82 struct ovsdb_jsonrpc_remote {
83 struct ovsdb_jsonrpc_server *server;
84 struct pstream *listener; /* Listener, if passive. */
85 struct list sessions; /* List of "struct ovsdb_jsonrpc_session"s. */
88 static void ovsdb_jsonrpc_server_add_remote(struct ovsdb_jsonrpc_server *,
90 static void ovsdb_jsonrpc_server_del_remote(struct shash_node *);
92 struct ovsdb_jsonrpc_server *
93 ovsdb_jsonrpc_server_create(struct ovsdb *db)
95 struct ovsdb_jsonrpc_server *server = xzalloc(sizeof *server);
97 server->max_sessions = 64;
98 shash_init(&server->remotes);
102 /* Sets 'svr''s current set of remotes to the names in 'new_remotes'. The data
103 * values in 'new_remotes' are ignored.
105 * A remote is an active or passive stream connection method, e.g. "pssl:" or
108 ovsdb_jsonrpc_server_set_remotes(struct ovsdb_jsonrpc_server *svr,
109 const struct shash *new_remotes)
111 struct shash_node *node, *next;
113 SHASH_FOR_EACH_SAFE (node, next, &svr->remotes) {
114 if (!shash_find(new_remotes, node->name)) {
115 ovsdb_jsonrpc_server_del_remote(node);
118 SHASH_FOR_EACH (node, new_remotes) {
119 if (!shash_find(&svr->remotes, node->name)) {
120 ovsdb_jsonrpc_server_add_remote(svr, node->name);
126 ovsdb_jsonrpc_server_add_remote(struct ovsdb_jsonrpc_server *svr,
129 struct ovsdb_jsonrpc_remote *remote;
130 struct pstream *listener;
133 error = pstream_open(name, &listener);
134 if (error && error != EAFNOSUPPORT) {
135 VLOG_ERR_RL(&rl, "%s: listen failed: %s", name, strerror(error));
139 remote = xmalloc(sizeof *remote);
140 remote->server = svr;
141 remote->listener = listener;
142 list_init(&remote->sessions);
143 shash_add(&svr->remotes, name, remote);
146 ovsdb_jsonrpc_session_create(remote, jsonrpc_session_open(name));
151 ovsdb_jsonrpc_server_del_remote(struct shash_node *node)
153 struct ovsdb_jsonrpc_remote *remote = node->data;
155 ovsdb_jsonrpc_session_close_all(remote);
156 pstream_close(remote->listener);
157 shash_delete(&remote->server->remotes, node);
162 ovsdb_jsonrpc_server_run(struct ovsdb_jsonrpc_server *svr)
164 struct shash_node *node;
166 SHASH_FOR_EACH (node, &svr->remotes) {
167 struct ovsdb_jsonrpc_remote *remote = node->data;
169 if (remote->listener && svr->n_sessions < svr->max_sessions) {
170 struct stream *stream;
173 error = pstream_accept(remote->listener, &stream);
175 struct jsonrpc_session *js;
176 js = jsonrpc_session_open_unreliably(jsonrpc_open(stream));
177 ovsdb_jsonrpc_session_create(remote, js);
178 } else if (error != EAGAIN) {
179 VLOG_WARN_RL(&rl, "%s: accept failed: %s",
180 pstream_get_name(remote->listener),
185 ovsdb_jsonrpc_session_run_all(remote);
190 ovsdb_jsonrpc_server_wait(struct ovsdb_jsonrpc_server *svr)
192 struct shash_node *node;
194 SHASH_FOR_EACH (node, &svr->remotes) {
195 struct ovsdb_jsonrpc_remote *remote = node->data;
197 if (remote->listener && svr->n_sessions < svr->max_sessions) {
198 pstream_wait(remote->listener);
201 ovsdb_jsonrpc_session_wait_all(remote);
205 /* JSON-RPC database server session. */
207 struct ovsdb_jsonrpc_session {
208 struct ovsdb_jsonrpc_remote *remote;
209 struct list node; /* Element in remote's sessions list. */
212 struct hmap triggers; /* Hmap of "struct ovsdb_jsonrpc_trigger"s. */
213 struct list completions; /* Completed triggers. */
216 struct hmap monitors; /* Hmap of "struct ovsdb_jsonrpc_monitor"s. */
218 /* Network connectivity. */
219 struct jsonrpc_session *js; /* JSON-RPC session. */
220 unsigned int js_seqno; /* Last jsonrpc_session_get_seqno() value. */
223 static void ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *);
224 static int ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *);
225 static void ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *);
226 static void ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *,
227 struct jsonrpc_msg *);
228 static void ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *,
229 struct jsonrpc_msg *);
231 static struct ovsdb_jsonrpc_session *
232 ovsdb_jsonrpc_session_create(struct ovsdb_jsonrpc_remote *remote,
233 struct jsonrpc_session *js)
235 struct ovsdb_jsonrpc_session *s;
237 s = xzalloc(sizeof *s);
239 list_push_back(&remote->sessions, &s->node);
240 hmap_init(&s->triggers);
241 hmap_init(&s->monitors);
242 list_init(&s->completions);
244 s->js_seqno = jsonrpc_session_get_seqno(js);
246 remote->server->n_sessions++;
252 ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *s)
254 jsonrpc_session_close(s->js);
255 list_remove(&s->node);
256 s->remote->server->n_sessions--;
260 ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *s)
262 jsonrpc_session_run(s->js);
263 if (s->js_seqno != jsonrpc_session_get_seqno(s->js)) {
264 s->js_seqno = jsonrpc_session_get_seqno(s->js);
265 ovsdb_jsonrpc_trigger_complete_all(s);
266 ovsdb_jsonrpc_monitor_remove_all(s);
269 ovsdb_jsonrpc_trigger_complete_done(s);
271 if (!jsonrpc_session_get_backlog(s->js)) {
272 struct jsonrpc_msg *msg = jsonrpc_session_recv(s->js);
274 if (msg->type == JSONRPC_REQUEST) {
275 ovsdb_jsonrpc_session_got_request(s, msg);
276 } else if (msg->type == JSONRPC_NOTIFY) {
277 ovsdb_jsonrpc_session_got_notify(s, msg);
279 VLOG_WARN("%s: received unexpected %s message",
280 jsonrpc_session_get_name(s->js),
281 jsonrpc_msg_type_to_string(msg->type));
282 jsonrpc_session_force_reconnect(s->js);
283 jsonrpc_msg_destroy(msg);
287 return jsonrpc_session_is_alive(s->js) ? 0 : ETIMEDOUT;
291 ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *remote)
293 struct ovsdb_jsonrpc_session *s, *next;
295 LIST_FOR_EACH_SAFE (s, next, struct ovsdb_jsonrpc_session, node,
297 int error = ovsdb_jsonrpc_session_run(s);
299 ovsdb_jsonrpc_session_close(s);
305 ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *s)
307 jsonrpc_session_wait(s->js);
308 if (!jsonrpc_session_get_backlog(s->js)) {
309 jsonrpc_session_recv_wait(s->js);
314 ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *remote)
316 struct ovsdb_jsonrpc_session *s;
318 LIST_FOR_EACH (s, struct ovsdb_jsonrpc_session, node, &remote->sessions) {
319 ovsdb_jsonrpc_session_wait(s);
324 ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *remote)
326 struct ovsdb_jsonrpc_session *s, *next;
328 LIST_FOR_EACH_SAFE (s, next, struct ovsdb_jsonrpc_session, node,
330 ovsdb_jsonrpc_session_close(s);
334 static struct jsonrpc_msg *
335 execute_transaction(struct ovsdb_jsonrpc_session *s,
336 struct jsonrpc_msg *request)
338 ovsdb_jsonrpc_trigger_create(s, request->id, request->params);
340 request->params = NULL;
345 ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *s,
346 struct jsonrpc_msg *request)
348 struct jsonrpc_msg *reply;
350 if (!strcmp(request->method, "transact")) {
351 reply = execute_transaction(s, request);
352 } else if (!strcmp(request->method, "monitor")) {
353 reply = jsonrpc_create_reply(
354 ovsdb_jsonrpc_monitor_create(s, request->params), request->id);
355 } else if (!strcmp(request->method, "monitor_cancel")) {
356 reply = ovsdb_jsonrpc_monitor_cancel(s, json_array(request->params),
358 } else if (!strcmp(request->method, "get_schema")) {
359 reply = jsonrpc_create_reply(
360 ovsdb_schema_to_json(s->remote->server->db->schema), request->id);
361 } else if (!strcmp(request->method, "echo")) {
362 reply = jsonrpc_create_reply(json_clone(request->params), request->id);
364 reply = jsonrpc_create_error(json_string_create("unknown method"),
369 jsonrpc_msg_destroy(request);
370 jsonrpc_session_send(s->js, reply);
375 execute_cancel(struct ovsdb_jsonrpc_session *s, struct jsonrpc_msg *request)
377 if (json_array(request->params)->n == 1) {
378 struct ovsdb_jsonrpc_trigger *t;
381 id = request->params->u.array.elems[0];
382 t = ovsdb_jsonrpc_trigger_find(s, id, json_hash(id, 0));
384 ovsdb_jsonrpc_trigger_complete(t);
390 ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *s,
391 struct jsonrpc_msg *request)
393 if (!strcmp(request->method, "cancel")) {
394 execute_cancel(s, request);
396 jsonrpc_msg_destroy(request);
399 /* JSON-RPC database server triggers.
401 * (Every transaction is treated as a trigger even if it doesn't actually have
402 * any "wait" operations.) */
404 struct ovsdb_jsonrpc_trigger {
405 struct ovsdb_trigger trigger;
406 struct ovsdb_jsonrpc_session *session;
407 struct hmap_node hmap_node; /* In session's "triggers" hmap. */
412 ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *s,
413 struct json *id, struct json *params)
415 struct ovsdb_jsonrpc_trigger *t;
418 /* Check for duplicate ID. */
419 hash = json_hash(id, 0);
420 t = ovsdb_jsonrpc_trigger_find(s, id, hash);
422 struct jsonrpc_msg *msg;
424 msg = jsonrpc_create_error(json_string_create("duplicate request ID"),
426 jsonrpc_session_send(s->js, msg);
428 json_destroy(params);
432 /* Insert into trigger table. */
433 t = xmalloc(sizeof *t);
434 ovsdb_trigger_init(s->remote->server->db,
435 &t->trigger, params, &s->completions,
439 hmap_insert(&s->triggers, &t->hmap_node, hash);
441 /* Complete early if possible. */
442 if (ovsdb_trigger_is_complete(&t->trigger)) {
443 ovsdb_jsonrpc_trigger_complete(t);
447 static struct ovsdb_jsonrpc_trigger *
448 ovsdb_jsonrpc_trigger_find(struct ovsdb_jsonrpc_session *s,
449 const struct json *id, size_t hash)
451 struct ovsdb_jsonrpc_trigger *t;
453 HMAP_FOR_EACH_WITH_HASH (t, struct ovsdb_jsonrpc_trigger, hmap_node, hash,
455 if (json_equal(t->id, id)) {
464 ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *t)
466 struct ovsdb_jsonrpc_session *s = t->session;
468 if (jsonrpc_session_is_connected(s->js)) {
469 struct jsonrpc_msg *reply;
472 result = ovsdb_trigger_steal_result(&t->trigger);
474 reply = jsonrpc_create_reply(result, t->id);
476 reply = jsonrpc_create_error(json_string_create("canceled"),
479 jsonrpc_session_send(s->js, reply);
483 ovsdb_trigger_destroy(&t->trigger);
484 hmap_remove(&s->triggers, &t->hmap_node);
489 ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *s)
491 struct ovsdb_jsonrpc_trigger *t, *next;
492 HMAP_FOR_EACH_SAFE (t, next, struct ovsdb_jsonrpc_trigger, hmap_node,
494 ovsdb_jsonrpc_trigger_complete(t);
499 ovsdb_jsonrpc_trigger_complete_done(struct ovsdb_jsonrpc_session *s)
501 while (!list_is_empty(&s->completions)) {
502 struct ovsdb_jsonrpc_trigger *t
503 = CONTAINER_OF(s->completions.next,
504 struct ovsdb_jsonrpc_trigger, trigger.node);
505 ovsdb_jsonrpc_trigger_complete(t);
509 /* JSON-RPC database table monitors. */
511 enum ovsdb_jsonrpc_monitor_selection {
512 OJMS_INITIAL = 1 << 0, /* All rows when monitor is created. */
513 OJMS_INSERT = 1 << 1, /* New rows. */
514 OJMS_DELETE = 1 << 2, /* Deleted rows. */
515 OJMS_MODIFY = 1 << 3 /* Modified rows. */
518 struct ovsdb_jsonrpc_monitor_table {
519 const struct ovsdb_table *table;
520 enum ovsdb_jsonrpc_monitor_selection select;
521 struct ovsdb_column_set columns;
524 struct ovsdb_jsonrpc_monitor {
525 struct ovsdb_replica replica;
526 struct ovsdb_jsonrpc_session *session;
527 struct hmap_node node; /* In ovsdb_jsonrpc_session's "monitors". */
529 struct json *monitor_id;
530 struct shash tables; /* Holds "struct ovsdb_jsonrpc_monitor_table"s. */
533 static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class;
535 struct ovsdb_jsonrpc_monitor *ovsdb_jsonrpc_monitor_find(
536 struct ovsdb_jsonrpc_session *, const struct json *monitor_id);
537 static void ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *);
538 static struct json *ovsdb_jsonrpc_monitor_get_initial(
539 const struct ovsdb_jsonrpc_monitor *);
542 parse_bool(struct ovsdb_parser *parser, const char *name, bool default_value)
544 const struct json *json;
546 json = ovsdb_parser_member(parser, name, OP_BOOLEAN | OP_OPTIONAL);
547 return json ? json_boolean(json) : default_value;
550 struct ovsdb_jsonrpc_monitor *
551 ovsdb_jsonrpc_monitor_find(struct ovsdb_jsonrpc_session *s,
552 const struct json *monitor_id)
554 struct ovsdb_jsonrpc_monitor *m;
556 HMAP_FOR_EACH_WITH_HASH (m, struct ovsdb_jsonrpc_monitor, node,
557 json_hash(monitor_id, 0), &s->monitors) {
558 if (json_equal(m->monitor_id, monitor_id)) {
567 ovsdb_jsonrpc_monitor_create(struct ovsdb_jsonrpc_session *s,
570 struct ovsdb_jsonrpc_monitor *m = NULL;
571 struct json *monitor_id, *monitor_requests;
572 struct ovsdb_error *error = NULL;
573 struct shash_node *node;
576 if (json_array(params)->n != 2) {
577 error = ovsdb_syntax_error(params, NULL, "invalid parameters");
580 monitor_id = params->u.array.elems[0];
581 monitor_requests = params->u.array.elems[1];
582 if (monitor_requests->type != JSON_OBJECT) {
583 error = ovsdb_syntax_error(monitor_requests, NULL,
584 "monitor-requests must be object");
588 if (ovsdb_jsonrpc_monitor_find(s, monitor_id)) {
589 error = ovsdb_syntax_error(monitor_id, NULL, "duplicate monitor ID");
593 m = xzalloc(sizeof *m);
594 ovsdb_replica_init(&m->replica, &ovsdb_jsonrpc_replica_class);
595 ovsdb_add_replica(s->remote->server->db, &m->replica);
597 hmap_insert(&s->monitors, &m->node, json_hash(monitor_id, 0));
598 m->monitor_id = json_clone(monitor_id);
599 shash_init(&m->tables);
601 SHASH_FOR_EACH (node, json_object(monitor_requests)) {
602 const struct ovsdb_table *table;
603 struct ovsdb_jsonrpc_monitor_table *mt;
604 const struct json *columns_json, *select_json;
605 struct ovsdb_parser parser;
607 table = ovsdb_get_table(s->remote->server->db, node->name);
609 error = ovsdb_syntax_error(NULL, NULL,
610 "no table named %s", node->name);
614 mt = xzalloc(sizeof *mt);
616 mt->select = OJMS_INITIAL | OJMS_INSERT | OJMS_DELETE | OJMS_MODIFY;
617 ovsdb_column_set_init(&mt->columns);
618 shash_add(&m->tables, table->schema->name, mt);
620 ovsdb_parser_init(&parser, node->data, "table %s", node->name);
621 columns_json = ovsdb_parser_member(&parser, "columns",
622 OP_ARRAY | OP_OPTIONAL);
623 select_json = ovsdb_parser_member(&parser, "select",
624 OP_OBJECT | OP_OPTIONAL);
625 error = ovsdb_parser_finish(&parser);
631 error = ovsdb_column_set_from_json(columns_json, table,
637 struct shash_node *node;
639 SHASH_FOR_EACH (node, &table->schema->columns) {
640 const struct ovsdb_column *column = node->data;
641 if (column->index != OVSDB_COL_UUID) {
642 ovsdb_column_set_add(&mt->columns, column);
649 ovsdb_parser_init(&parser, select_json, "table %s select",
650 table->schema->name);
651 if (parse_bool(&parser, "initial", true)) {
652 mt->select |= OJMS_INITIAL;
654 if (parse_bool(&parser, "insert", true)) {
655 mt->select |= OJMS_INSERT;
657 if (parse_bool(&parser, "delete", true)) {
658 mt->select |= OJMS_DELETE;
660 if (parse_bool(&parser, "modify", true)) {
661 mt->select |= OJMS_MODIFY;
663 error = ovsdb_parser_finish(&parser);
670 return ovsdb_jsonrpc_monitor_get_initial(m);
674 ovsdb_remove_replica(s->remote->server->db, &m->replica);
677 json = ovsdb_error_to_json(error);
678 ovsdb_error_destroy(error);
682 static struct jsonrpc_msg *
683 ovsdb_jsonrpc_monitor_cancel(struct ovsdb_jsonrpc_session *s,
684 struct json_array *params,
685 const struct json *request_id)
687 if (params->n != 1) {
688 return jsonrpc_create_error(json_string_create("invalid parameters"),
691 struct ovsdb_jsonrpc_monitor *m;
693 m = ovsdb_jsonrpc_monitor_find(s, params->elems[0]);
695 return jsonrpc_create_error(json_string_create("unknown monitor"),
698 ovsdb_remove_replica(s->remote->server->db, &m->replica);
699 return jsonrpc_create_reply(json_object_create(), request_id);
705 ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *s)
707 struct ovsdb_jsonrpc_monitor *m, *next;
709 HMAP_FOR_EACH_SAFE (m, next,
710 struct ovsdb_jsonrpc_monitor, node, &s->monitors) {
711 ovsdb_remove_replica(s->remote->server->db, &m->replica);
715 static struct ovsdb_jsonrpc_monitor *
716 ovsdb_jsonrpc_monitor_cast(struct ovsdb_replica *replica)
718 assert(replica->class == &ovsdb_jsonrpc_replica_class);
719 return CONTAINER_OF(replica, struct ovsdb_jsonrpc_monitor, replica);
722 struct ovsdb_jsonrpc_monitor_aux {
723 bool initial; /* Sending initial contents of table? */
724 const struct ovsdb_jsonrpc_monitor *monitor;
725 struct json *json; /* JSON for the whole transaction. */
728 struct ovsdb_jsonrpc_monitor_table *mt;
729 struct json *table_json; /* JSON for table's transaction. */
733 ovsdb_jsonrpc_monitor_change_cb(const struct ovsdb_row *old,
734 const struct ovsdb_row *new,
737 struct ovsdb_jsonrpc_monitor_aux *aux = aux_;
738 const struct ovsdb_jsonrpc_monitor *m = aux->monitor;
739 struct ovsdb_table *table = new ? new->table : old->table;
740 enum ovsdb_jsonrpc_monitor_selection type;
741 struct json *old_json, *new_json;
742 struct json *row_json;
743 char uuid[UUID_LEN + 1];
747 if (!aux->mt || table != aux->mt->table) {
748 aux->mt = shash_find_data(&m->tables, table->schema->name);
749 aux->table_json = NULL;
751 /* We don't care about rows in this table at all. Tell the caller
757 type = (aux->initial ? OJMS_INITIAL
761 if (!(aux->mt->select & type)) {
762 /* We don't care about this type of change (but do want to be called
763 * back for changes to other rows in the same table). */
767 old_json = new_json = NULL;
769 for (i = 0; i < aux->mt->columns.n_columns; i++) {
770 const struct ovsdb_column *column = aux->mt->columns.columns[i];
771 unsigned int idx = column->index;
772 bool changed = false;
774 if (type == OJMS_MODIFY) {
775 changed = !ovsdb_datum_equals(&old->fields[idx],
776 &new->fields[idx], &column->type);
777 n_changed += changed;
779 if (changed || type == OJMS_DELETE) {
781 old_json = json_object_create();
783 json_object_put(old_json, column->name,
784 ovsdb_datum_to_json(&old->fields[idx],
787 if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) {
789 new_json = json_object_create();
791 json_object_put(new_json, column->name,
792 ovsdb_datum_to_json(&new->fields[idx],
796 if ((type == OJMS_MODIFY && !n_changed) || (!old_json && !new_json)) {
797 /* No reportable changes. */
798 json_destroy(old_json);
799 json_destroy(new_json);
803 /* Create JSON object for transaction overall. */
805 aux->json = json_object_create();
808 /* Create JSON object for transaction on this table. */
809 if (!aux->table_json) {
810 aux->table_json = json_object_create();
811 json_object_put(aux->json, aux->mt->table->schema->name,
815 /* Create JSON object for transaction on this row. */
816 row_json = json_object_create();
818 json_object_put(row_json, "old", old_json);
821 json_object_put(row_json, "new", new_json);
824 /* Add JSON row to JSON table. */
825 snprintf(uuid, sizeof uuid,
826 UUID_FMT, UUID_ARGS(ovsdb_row_get_uuid(new ? new : old)));
827 json_object_put(aux->table_json, uuid, row_json);
833 ovsdb_jsonrpc_monitor_init_aux(struct ovsdb_jsonrpc_monitor_aux *aux,
834 const struct ovsdb_jsonrpc_monitor *m,
837 aux->initial = initial;
841 aux->table_json = NULL;
844 static struct ovsdb_error *
845 ovsdb_jsonrpc_monitor_commit(struct ovsdb_replica *replica,
846 const struct ovsdb_txn *txn, bool durable UNUSED)
848 struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
849 struct ovsdb_jsonrpc_monitor_aux aux;
851 ovsdb_jsonrpc_monitor_init_aux(&aux, m, false);
852 ovsdb_txn_for_each_change(txn, ovsdb_jsonrpc_monitor_change_cb, &aux);
854 struct jsonrpc_msg *msg;
857 params = json_array_create_2(json_clone(aux.monitor->monitor_id),
859 msg = jsonrpc_create_notify("update", params);
860 jsonrpc_session_send(aux.monitor->session->js, msg);
867 ovsdb_jsonrpc_monitor_get_initial(const struct ovsdb_jsonrpc_monitor *m)
869 struct ovsdb_jsonrpc_monitor_aux aux;
870 struct shash_node *node;
872 ovsdb_jsonrpc_monitor_init_aux(&aux, m, true);
873 SHASH_FOR_EACH (node, &m->tables) {
874 struct ovsdb_jsonrpc_monitor_table *mt = node->data;
876 if (mt->select & OJMS_INITIAL) {
877 struct ovsdb_row *row;
879 HMAP_FOR_EACH (row, struct ovsdb_row, hmap_node,
881 ovsdb_jsonrpc_monitor_change_cb(NULL, row, &aux);
885 return aux.json ? aux.json : json_object_create();
889 ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *replica)
891 struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
892 struct shash_node *node;
894 json_destroy(m->monitor_id);
895 SHASH_FOR_EACH (node, &m->tables) {
896 struct ovsdb_jsonrpc_monitor_table *mt = node->data;
897 ovsdb_column_set_destroy(&mt->columns);
900 shash_destroy(&m->tables);
901 hmap_remove(&m->session->monitors, &m->node);
905 static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class = {
906 ovsdb_jsonrpc_monitor_commit,
907 ovsdb_jsonrpc_monitor_destroy