static bool ovsdb_jsonrpc_session_get_status(
const struct ovsdb_jsonrpc_remote *,
struct ovsdb_jsonrpc_remote_status *);
+static void ovsdb_jsonrpc_session_unlock_all(struct ovsdb_jsonrpc_session *);
+static void ovsdb_jsonrpc_session_unlock__(struct ovsdb_lock_waiter *);
/* Triggers. */
static void ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *,
return remote && ovsdb_jsonrpc_session_get_status(remote, status);
}
+void
+ovsdb_jsonrpc_server_free_remote_status(
+ struct ovsdb_jsonrpc_remote_status *status)
+{
+ free(status->locks_held);
+ free(status->locks_waiting);
+ free(status->locks_lost);
+}
+
/* Forces all of the JSON-RPC sessions managed by 'svr' to disconnect and
* reconnect. */
void
ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *s)
{
ovsdb_jsonrpc_monitor_remove_all(s);
+ ovsdb_jsonrpc_session_unlock_all(s);
jsonrpc_session_close(s->js);
list_remove(&s->node);
+ ovsdb_session_destroy(&s->up);
s->remote->server->n_sessions--;
ovsdb_session_destroy(&s->up);
free(s);
s->js_seqno = jsonrpc_session_get_seqno(s->js);
ovsdb_jsonrpc_trigger_complete_all(s);
ovsdb_jsonrpc_monitor_remove_all(s);
+ ovsdb_jsonrpc_session_unlock_all(s);
}
ovsdb_jsonrpc_trigger_complete_done(s);
{
const struct ovsdb_jsonrpc_session *s;
const struct jsonrpc_session *js;
+ struct ovsdb_lock_waiter *waiter;
struct reconnect_stats rstats;
+ struct ds locks_held, locks_waiting, locks_lost;
if (list_is_empty(&remote->sessions)) {
return false;
status->sec_since_disconnect = rstats.msec_since_disconnect == UINT_MAX
? UINT_MAX : rstats.msec_since_disconnect / 1000;
+ ds_init(&locks_held);
+ ds_init(&locks_waiting);
+ ds_init(&locks_lost);
+ HMAP_FOR_EACH (waiter, session_node, &s->up.waiters) {
+ struct ds *string;
+
+ string = (ovsdb_lock_waiter_is_owner(waiter) ? &locks_held
+ : waiter->mode == OVSDB_LOCK_WAIT ? &locks_waiting
+ : &locks_lost);
+ if (string->length) {
+ ds_put_char(string, ' ');
+ }
+ ds_put_cstr(string, waiter->lock_name);
+ }
+ status->locks_held = ds_steal_cstr(&locks_held);
+ status->locks_waiting = ds_steal_cstr(&locks_waiting);
+ status->locks_lost = ds_steal_cstr(&locks_lost);
+
status->n_connections = list_size(&remote->sessions);
return true;
return reply;
}
+static struct ovsdb_error *
+ovsdb_jsonrpc_session_parse_lock_name(const struct jsonrpc_msg *request,
+ const char **lock_namep)
+{
+ const struct json_array *params;
+
+ params = json_array(request->params);
+ if (params->n != 1 || params->elems[0]->type != JSON_STRING ||
+ !ovsdb_parser_is_id(json_string(params->elems[0]))) {
+ *lock_namep = NULL;
+ return ovsdb_syntax_error(request->params, NULL,
+ "%s request params must be <id>",
+ request->method);
+ }
+
+ *lock_namep = json_string(params->elems[0]);
+ return NULL;
+}
+
+static void
+ovsdb_jsonrpc_session_notify(struct ovsdb_session *session,
+ const char *lock_name,
+ const char *method)
+{
+ struct ovsdb_jsonrpc_session *s;
+ struct json *params;
+
+ s = CONTAINER_OF(session, struct ovsdb_jsonrpc_session, up);
+ params = json_array_create_1(json_string_create(lock_name));
+ jsonrpc_session_send(s->js, jsonrpc_create_notify(method, params));
+}
+
+static struct jsonrpc_msg *
+ovsdb_jsonrpc_session_lock(struct ovsdb_jsonrpc_session *s,
+ struct jsonrpc_msg *request,
+ enum ovsdb_lock_mode mode)
+{
+ struct ovsdb_lock_waiter *waiter;
+ struct jsonrpc_msg *reply;
+ struct ovsdb_error *error;
+ struct ovsdb_session *victim;
+ const char *lock_name;
+ struct json *result;
+
+ error = ovsdb_jsonrpc_session_parse_lock_name(request, &lock_name);
+ if (error) {
+ goto error;
+ }
+
+ /* Report error if this session has issued a "lock" or "steal" without a
+ * matching "unlock" for this lock. */
+ waiter = ovsdb_session_get_lock_waiter(&s->up, lock_name);
+ if (waiter) {
+ error = ovsdb_syntax_error(
+ request->params, NULL,
+ "must issue \"unlock\" before new \"%s\"", request->method);
+ goto error;
+ }
+
+ /* Get the lock, add us as a waiter. */
+ waiter = ovsdb_server_lock(&s->remote->server->up, &s->up, lock_name, mode,
+ &victim);
+ if (victim) {
+ ovsdb_jsonrpc_session_notify(victim, lock_name, "stolen");
+ }
+
+ result = json_object_create();
+ json_object_put(result, "locked",
+ json_boolean_create(ovsdb_lock_waiter_is_owner(waiter)));
+
+ return jsonrpc_create_reply(result, request->id);
+
+error:
+ reply = jsonrpc_create_reply(ovsdb_error_to_json(error), request->id);
+ ovsdb_error_destroy(error);
+ return reply;
+}
+
+static void
+ovsdb_jsonrpc_session_unlock_all(struct ovsdb_jsonrpc_session *s)
+{
+ struct ovsdb_lock_waiter *waiter, *next;
+
+ HMAP_FOR_EACH_SAFE (waiter, next, session_node, &s->up.waiters) {
+ ovsdb_jsonrpc_session_unlock__(waiter);
+ }
+}
+
+static void
+ovsdb_jsonrpc_session_unlock__(struct ovsdb_lock_waiter *waiter)
+{
+ struct ovsdb_lock *lock = waiter->lock;
+
+ if (lock) {
+ struct ovsdb_session *new_owner = ovsdb_lock_waiter_remove(waiter);
+ if (new_owner) {
+ ovsdb_jsonrpc_session_notify(new_owner, lock->name, "locked");
+ } else {
+ /* ovsdb_server_lock() might have freed 'lock'. */
+ }
+ }
+
+ ovsdb_lock_waiter_destroy(waiter);
+}
+
+static struct jsonrpc_msg *
+ovsdb_jsonrpc_session_unlock(struct ovsdb_jsonrpc_session *s,
+ struct jsonrpc_msg *request)
+{
+ struct ovsdb_lock_waiter *waiter;
+ struct jsonrpc_msg *reply;
+ struct ovsdb_error *error;
+ const char *lock_name;
+
+ error = ovsdb_jsonrpc_session_parse_lock_name(request, &lock_name);
+ if (error) {
+ goto error;
+ }
+
+ /* Report error if this session has not issued a "lock" or "steal" for this
+ * lock. */
+ waiter = ovsdb_session_get_lock_waiter(&s->up, lock_name);
+ if (!waiter) {
+ error = ovsdb_syntax_error(
+ request->params, NULL, "\"unlock\" without \"lock\" or \"steal\"");
+ goto error;
+ }
+
+ ovsdb_jsonrpc_session_unlock__(waiter);
+
+ return jsonrpc_create_reply(json_object_create(), request->id);
+
+error:
+ reply = jsonrpc_create_reply(ovsdb_error_to_json(error), request->id);
+ ovsdb_error_destroy(error);
+ return reply;
+}
+
static struct jsonrpc_msg *
execute_transaction(struct ovsdb_jsonrpc_session *s,
struct jsonrpc_msg *request)
reply = jsonrpc_create_reply(
json_array_create_1(json_string_create(get_db_name(s))),
request->id);
+ } else if (!strcmp(request->method, "lock")) {
+ reply = ovsdb_jsonrpc_session_lock(s, request, OVSDB_LOCK_WAIT);
+ } else if (!strcmp(request->method, "steal")) {
+ reply = ovsdb_jsonrpc_session_lock(s, request, OVSDB_LOCK_STEAL);
+ } else if (!strcmp(request->method, "unlock")) {
+ reply = ovsdb_jsonrpc_session_unlock(s, request);
} else if (!strcmp(request->method, "echo")) {
reply = jsonrpc_create_reply(json_clone(request->params), request->id);
} else {
git://git.onelab.eu / sliver-openvswitch.git / blobdiff