-/* Copyright (c) 2009 Nicira Networks
+/* Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "jsonrpc-server.h"
+#include <assert.h>
#include <errno.h>
+#include "bitmap.h"
+#include "column.h"
+#include "dynamic-string.h"
#include "json.h"
#include "jsonrpc.h"
+#include "ovsdb-error.h"
+#include "ovsdb-parser.h"
#include "ovsdb.h"
+#include "reconnect.h"
+#include "row.h"
+#include "server.h"
#include "stream.h"
-#include "svec.h"
+#include "table.h"
#include "timeval.h"
+#include "transaction.h"
#include "trigger.h"
-
-#define THIS_MODULE VLM_ovsdb_jsonrpc_server
#include "vlog.h"
-struct ovsdb_jsonrpc_trigger {
- struct ovsdb_trigger trigger;
- struct ovsdb_jsonrpc_session *session;
- struct hmap_node hmap_node; /* Element in session's trigger table. */
- struct json *id;
-};
+VLOG_DEFINE_THIS_MODULE(ovsdb_jsonrpc_server);
+
+struct ovsdb_jsonrpc_remote;
+struct ovsdb_jsonrpc_session;
+
+/* Message rate-limiting. */
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+/* Sessions. */
+static struct ovsdb_jsonrpc_session *ovsdb_jsonrpc_session_create(
+ struct ovsdb_jsonrpc_remote *, struct jsonrpc_session *);
+static void ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *);
+static void ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *);
+static void ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *);
+static void ovsdb_jsonrpc_session_reconnect_all(struct ovsdb_jsonrpc_remote *);
+static void ovsdb_jsonrpc_session_set_all_options(
+ struct ovsdb_jsonrpc_remote *, const struct ovsdb_jsonrpc_options *);
+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 *,
+ struct json *id, struct json *params);
static struct ovsdb_jsonrpc_trigger *ovsdb_jsonrpc_trigger_find(
struct ovsdb_jsonrpc_session *, const struct json *id, size_t hash);
static void ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *);
+static void ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *);
+static void ovsdb_jsonrpc_trigger_complete_done(
+ struct ovsdb_jsonrpc_session *);
-struct ovsdb_jsonrpc_session {
- struct ovsdb_jsonrpc_server *server;
- struct list node; /* Element in server's sessions list. */
- struct jsonrpc *rpc;
- struct hmap triggers;
- struct list completions; /* Completed triggers. */
-};
-
-static void ovsdb_jsonrpc_session_open(struct ovsdb_jsonrpc_server *,
- struct stream *);
-static void ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *);
-static void ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *,
- struct jsonrpc_msg *);
-static void ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *,
- struct jsonrpc_msg *);
+/* Monitors. */
+static struct json *ovsdb_jsonrpc_monitor_create(
+ struct ovsdb_jsonrpc_session *, struct json *params);
+static struct jsonrpc_msg *ovsdb_jsonrpc_monitor_cancel(
+ struct ovsdb_jsonrpc_session *,
+ struct json_array *params,
+ const struct json *request_id);
+static void ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *);
+\f
+/* JSON-RPC database server. */
struct ovsdb_jsonrpc_server {
- struct ovsdb *db;
-
- struct list sessions; /* List of "struct ovsdb_jsonrpc_session"s. */
+ struct ovsdb_server up;
unsigned int n_sessions, max_sessions;
- unsigned int max_triggers;
+ struct shash remotes; /* Contains "struct ovsdb_jsonrpc_remote *"s. */
+};
- struct pstream **listeners;
- size_t n_listeners, allocated_listeners;
+/* A configured remote. This is either a passive stream listener plus a list
+ * of the currently connected sessions, or a list of exactly one active
+ * session. */
+struct ovsdb_jsonrpc_remote {
+ struct ovsdb_jsonrpc_server *server;
+ struct pstream *listener; /* Listener, if passive. */
+ struct list sessions; /* List of "struct ovsdb_jsonrpc_session"s. */
};
-static void ovsdb_jsonrpc_server_listen(struct ovsdb_jsonrpc_server *,
- struct pstream *);
+static struct ovsdb_jsonrpc_remote *ovsdb_jsonrpc_server_add_remote(
+ struct ovsdb_jsonrpc_server *, const char *name,
+ const struct ovsdb_jsonrpc_options *options
+);
+static void ovsdb_jsonrpc_server_del_remote(struct shash_node *);
-int
-ovsdb_jsonrpc_server_create(struct ovsdb *db, const struct svec *active,
- const struct svec *passive,
- struct ovsdb_jsonrpc_server **serverp)
+struct ovsdb_jsonrpc_server *
+ovsdb_jsonrpc_server_create(struct ovsdb *db)
{
- struct ovsdb_jsonrpc_server *server;
- const char *name;
- int retval = 0;
- size_t i;
-
- server = xzalloc(sizeof *server);
- server->db = db;
+ struct ovsdb_jsonrpc_server *server = xzalloc(sizeof *server);
+ ovsdb_server_init(&server->up, db);
server->max_sessions = 64;
- server->max_triggers = 64;
- list_init(&server->sessions);
+ shash_init(&server->remotes);
+ return server;
+}
- SVEC_FOR_EACH (i, name, active) {
- struct stream *stream;
- int error;
+void
+ovsdb_jsonrpc_server_destroy(struct ovsdb_jsonrpc_server *svr)
+{
+ struct shash_node *node, *next;
- error = stream_open(name, &stream);
- if (!error) {
- ovsdb_jsonrpc_session_open(server, stream);
- } else {
- ovs_error(error, "%s: connection failed", name);
- retval = error;
- }
+ SHASH_FOR_EACH_SAFE (node, next, &svr->remotes) {
+ ovsdb_jsonrpc_server_del_remote(node);
}
+ shash_destroy(&svr->remotes);
+ ovsdb_server_destroy(&svr->up);
+ free(svr);
+}
- SVEC_FOR_EACH (i, name, passive) {
- struct pstream *pstream;
- int error;
+struct ovsdb_jsonrpc_options *
+ovsdb_jsonrpc_default_options(const char *target)
+{
+ struct ovsdb_jsonrpc_options *options = xzalloc(sizeof *options);
+ options->max_backoff = RECONNECT_DEFAULT_MAX_BACKOFF;
+ options->probe_interval = (stream_or_pstream_needs_probes(target)
+ ? RECONNECT_DEFAULT_PROBE_INTERVAL
+ : 0);
+ return options;
+}
- error = pstream_open(name, &pstream);
- if (!error) {
- ovsdb_jsonrpc_server_listen(server, pstream);
- } else {
- ovs_error(error, "failed to listen on %s", name);
- retval = error;
+/* Sets 'svr''s current set of remotes to the names in 'new_remotes', with
+ * options in the struct ovsdb_jsonrpc_options supplied as the data values.
+ *
+ * A remote is an active or passive stream connection method, e.g. "pssl:" or
+ * "tcp:1.2.3.4". */
+void
+ovsdb_jsonrpc_server_set_remotes(struct ovsdb_jsonrpc_server *svr,
+ const struct shash *new_remotes)
+{
+ struct shash_node *node, *next;
+
+ SHASH_FOR_EACH_SAFE (node, next, &svr->remotes) {
+ if (!shash_find(new_remotes, node->name)) {
+ VLOG_INFO("%s: remote deconfigured", node->name);
+ ovsdb_jsonrpc_server_del_remote(node);
+ }
+ }
+ SHASH_FOR_EACH (node, new_remotes) {
+ const struct ovsdb_jsonrpc_options *options = node->data;
+ struct ovsdb_jsonrpc_remote *remote;
+
+ remote = shash_find_data(&svr->remotes, node->name);
+ if (!remote) {
+ remote = ovsdb_jsonrpc_server_add_remote(svr, node->name, options);
+ if (!remote) {
+ continue;
+ }
}
+
+ ovsdb_jsonrpc_session_set_all_options(remote, options);
+ }
+}
+
+static struct ovsdb_jsonrpc_remote *
+ovsdb_jsonrpc_server_add_remote(struct ovsdb_jsonrpc_server *svr,
+ const char *name,
+ const struct ovsdb_jsonrpc_options *options)
+{
+ struct ovsdb_jsonrpc_remote *remote;
+ struct pstream *listener;
+ int error;
+
+ error = jsonrpc_pstream_open(name, &listener, options->dscp);
+ if (error && error != EAFNOSUPPORT) {
+ VLOG_ERR_RL(&rl, "%s: listen failed: %s", name, strerror(error));
+ return NULL;
+ }
+
+ remote = xmalloc(sizeof *remote);
+ remote->server = svr;
+ remote->listener = listener;
+ list_init(&remote->sessions);
+ shash_add(&svr->remotes, name, remote);
+
+ if (!listener) {
+ ovsdb_jsonrpc_session_create(remote, jsonrpc_session_open(name));
}
+ return remote;
+}
+
+static void
+ovsdb_jsonrpc_server_del_remote(struct shash_node *node)
+{
+ struct ovsdb_jsonrpc_remote *remote = node->data;
+
+ ovsdb_jsonrpc_session_close_all(remote);
+ pstream_close(remote->listener);
+ shash_delete(&remote->server->remotes, node);
+ free(remote);
+}
+
+/* Stores status information for the remote named 'target', which should have
+ * been configured on 'svr' with a call to ovsdb_jsonrpc_server_set_remotes(),
+ * into '*status'. On success returns true, on failure (if 'svr' doesn't have
+ * a remote named 'target' or if that remote is an inbound remote that has no
+ * active connections) returns false. On failure, 'status' will be zeroed.
+ */
+bool
+ovsdb_jsonrpc_server_get_remote_status(
+ const struct ovsdb_jsonrpc_server *svr, const char *target,
+ struct ovsdb_jsonrpc_remote_status *status)
+{
+ const struct ovsdb_jsonrpc_remote *remote;
+
+ memset(status, 0, sizeof *status);
+
+ remote = shash_find_data(&svr->remotes, target);
+ return remote && ovsdb_jsonrpc_session_get_status(remote, status);
+}
- *serverp = server;
- return retval;
+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_server_reconnect(struct ovsdb_jsonrpc_server *svr)
+{
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, &svr->remotes) {
+ struct ovsdb_jsonrpc_remote *remote = node->data;
+
+ ovsdb_jsonrpc_session_reconnect_all(remote);
+ }
}
void
ovsdb_jsonrpc_server_run(struct ovsdb_jsonrpc_server *svr)
{
- struct ovsdb_jsonrpc_session *s, *next;
- size_t i;
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, &svr->remotes) {
+ struct ovsdb_jsonrpc_remote *remote = node->data;
- /* Accept new connections. */
- for (i = 0; i < svr->n_listeners && svr->n_sessions < svr->max_sessions;) {
- struct pstream *listener = svr->listeners[i];
- struct stream *stream;
- int error;
+ if (remote->listener && svr->n_sessions < svr->max_sessions) {
+ struct stream *stream;
+ int error;
- error = pstream_accept(listener, &stream);
- if (!error) {
- ovsdb_jsonrpc_session_open(svr, stream);
- } else if (error == EAGAIN) {
- i++;
- } else if (error) {
- VLOG_WARN("%s: accept failed: %s",
- pstream_get_name(listener), strerror(error));
- pstream_close(listener);
- svr->listeners[i] = svr->listeners[--svr->n_listeners];
+ error = pstream_accept(remote->listener, &stream);
+ if (!error) {
+ struct jsonrpc_session *js;
+ js = jsonrpc_session_open_unreliably(jsonrpc_open(stream));
+ ovsdb_jsonrpc_session_create(remote, js);
+ } else if (error != EAGAIN) {
+ VLOG_WARN_RL(&rl, "%s: accept failed: %s",
+ pstream_get_name(remote->listener),
+ strerror(error));
+ }
}
+
+ ovsdb_jsonrpc_session_run_all(remote);
}
+}
- /* Handle each session. */
- LIST_FOR_EACH_SAFE (s, next, struct ovsdb_jsonrpc_session, node,
- &svr->sessions) {
- struct jsonrpc_msg *msg;
- int error;
+void
+ovsdb_jsonrpc_server_wait(struct ovsdb_jsonrpc_server *svr)
+{
+ struct shash_node *node;
- jsonrpc_run(s->rpc);
+ SHASH_FOR_EACH (node, &svr->remotes) {
+ struct ovsdb_jsonrpc_remote *remote = node->data;
- while (!list_is_empty(&s->completions)) {
- struct ovsdb_jsonrpc_trigger *t
- = CONTAINER_OF(s->completions.next,
- struct ovsdb_jsonrpc_trigger, trigger.node);
- ovsdb_jsonrpc_trigger_complete(t);
+ if (remote->listener && svr->n_sessions < svr->max_sessions) {
+ pstream_wait(remote->listener);
}
- if (!jsonrpc_get_backlog(s->rpc) && !jsonrpc_recv(s->rpc, &msg)) {
+ ovsdb_jsonrpc_session_wait_all(remote);
+ }
+}
+\f
+/* JSON-RPC database server session. */
+
+struct ovsdb_jsonrpc_session {
+ struct list node; /* Element in remote's sessions list. */
+ struct ovsdb_session up;
+ struct ovsdb_jsonrpc_remote *remote;
+
+ /* Triggers. */
+ struct hmap triggers; /* Hmap of "struct ovsdb_jsonrpc_trigger"s. */
+
+ /* Monitors. */
+ struct hmap monitors; /* Hmap of "struct ovsdb_jsonrpc_monitor"s. */
+
+ /* Network connectivity. */
+ struct jsonrpc_session *js; /* JSON-RPC session. */
+ unsigned int js_seqno; /* Last jsonrpc_session_get_seqno() value. */
+};
+
+static void ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *);
+static int ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *);
+static void ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *);
+static void ovsdb_jsonrpc_session_set_options(
+ struct ovsdb_jsonrpc_session *, const struct ovsdb_jsonrpc_options *);
+static void ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *,
+ struct jsonrpc_msg *);
+static void ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *,
+ struct jsonrpc_msg *);
+
+static struct ovsdb_jsonrpc_session *
+ovsdb_jsonrpc_session_create(struct ovsdb_jsonrpc_remote *remote,
+ struct jsonrpc_session *js)
+{
+ struct ovsdb_jsonrpc_session *s;
+
+ s = xzalloc(sizeof *s);
+ ovsdb_session_init(&s->up, remote->server->up.db);
+ s->remote = remote;
+ list_push_back(&remote->sessions, &s->node);
+ hmap_init(&s->triggers);
+ hmap_init(&s->monitors);
+ s->js = js;
+ s->js_seqno = jsonrpc_session_get_seqno(js);
+
+ remote->server->n_sessions++;
+
+ return s;
+}
+
+static 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);
+}
+
+static int
+ovsdb_jsonrpc_session_run(struct ovsdb_jsonrpc_session *s)
+{
+ jsonrpc_session_run(s->js);
+ if (s->js_seqno != jsonrpc_session_get_seqno(s->js)) {
+ 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);
+
+ if (!jsonrpc_session_get_backlog(s->js)) {
+ struct jsonrpc_msg *msg = jsonrpc_session_recv(s->js);
+ if (msg) {
if (msg->type == JSONRPC_REQUEST) {
ovsdb_jsonrpc_session_got_request(s, msg);
} else if (msg->type == JSONRPC_NOTIFY) {
ovsdb_jsonrpc_session_got_notify(s, msg);
} else {
VLOG_WARN("%s: received unexpected %s message",
- jsonrpc_get_name(s->rpc),
+ jsonrpc_session_get_name(s->js),
jsonrpc_msg_type_to_string(msg->type));
- jsonrpc_error(s->rpc, EPROTO);
+ jsonrpc_session_force_reconnect(s->js);
jsonrpc_msg_destroy(msg);
}
}
+ }
+ return jsonrpc_session_is_alive(s->js) ? 0 : ETIMEDOUT;
+}
+
+static void
+ovsdb_jsonrpc_session_set_options(struct ovsdb_jsonrpc_session *session,
+ const struct ovsdb_jsonrpc_options *options)
+{
+ jsonrpc_session_set_max_backoff(session->js, options->max_backoff);
+ jsonrpc_session_set_probe_interval(session->js, options->probe_interval);
+ jsonrpc_session_set_dscp(session->js, options->dscp);
+}
+
+static void
+ovsdb_jsonrpc_session_run_all(struct ovsdb_jsonrpc_remote *remote)
+{
+ struct ovsdb_jsonrpc_session *s, *next;
- error = jsonrpc_get_status(s->rpc);
+ LIST_FOR_EACH_SAFE (s, next, node, &remote->sessions) {
+ int error = ovsdb_jsonrpc_session_run(s);
if (error) {
ovsdb_jsonrpc_session_close(s);
}
}
}
-void
-ovsdb_jsonrpc_server_wait(struct ovsdb_jsonrpc_server *svr)
+static void
+ovsdb_jsonrpc_session_wait(struct ovsdb_jsonrpc_session *s)
+{
+ jsonrpc_session_wait(s->js);
+ if (!jsonrpc_session_get_backlog(s->js)) {
+ jsonrpc_session_recv_wait(s->js);
+ }
+}
+
+static void
+ovsdb_jsonrpc_session_wait_all(struct ovsdb_jsonrpc_remote *remote)
{
struct ovsdb_jsonrpc_session *s;
- if (svr->n_sessions < svr->max_sessions) {
- size_t i;
+ LIST_FOR_EACH (s, node, &remote->sessions) {
+ ovsdb_jsonrpc_session_wait(s);
+ }
+}
+
+static void
+ovsdb_jsonrpc_session_close_all(struct ovsdb_jsonrpc_remote *remote)
+{
+ struct ovsdb_jsonrpc_session *s, *next;
+
+ LIST_FOR_EACH_SAFE (s, next, node, &remote->sessions) {
+ ovsdb_jsonrpc_session_close(s);
+ }
+}
+
+/* Forces all of the JSON-RPC sessions managed by 'remote' to disconnect and
+ * reconnect. */
+static void
+ovsdb_jsonrpc_session_reconnect_all(struct ovsdb_jsonrpc_remote *remote)
+{
+ struct ovsdb_jsonrpc_session *s, *next;
- for (i = 0; i < svr->n_listeners; i++) {
- pstream_wait(svr->listeners[i]);
+ LIST_FOR_EACH_SAFE (s, next, node, &remote->sessions) {
+ jsonrpc_session_force_reconnect(s->js);
+ if (!jsonrpc_session_is_alive(s->js)) {
+ ovsdb_jsonrpc_session_close(s);
}
}
+}
+
+/* Sets the options for all of the JSON-RPC sessions managed by 'remote' to
+ * 'options'. */
+static void
+ovsdb_jsonrpc_session_set_all_options(
+ struct ovsdb_jsonrpc_remote *remote,
+ const struct ovsdb_jsonrpc_options *options)
+{
+ struct ovsdb_jsonrpc_session *s;
+
+ LIST_FOR_EACH (s, node, &remote->sessions) {
+ ovsdb_jsonrpc_session_set_options(s, options);
+ }
+}
+
+static bool
+ovsdb_jsonrpc_session_get_status(const struct ovsdb_jsonrpc_remote *remote,
+ struct ovsdb_jsonrpc_remote_status *status)
+{
+ 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;
+ }
+ s = CONTAINER_OF(remote->sessions.next, struct ovsdb_jsonrpc_session, node);
+ js = s->js;
+
+ status->is_connected = jsonrpc_session_is_connected(js);
+ status->last_error = jsonrpc_session_get_status(js);
- LIST_FOR_EACH (s, struct ovsdb_jsonrpc_session, node, &svr->sessions) {
- jsonrpc_wait(s->rpc);
- if (!jsonrpc_get_backlog(s->rpc)) {
- jsonrpc_recv_wait(s->rpc);
+ jsonrpc_session_get_reconnect_stats(js, &rstats);
+ status->state = rstats.state;
+ status->sec_since_connect = rstats.msec_since_connect == UINT_MAX
+ ? UINT_MAX : rstats.msec_since_connect / 1000;
+ 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;
+}
+
+static const char *
+get_db_name(const struct ovsdb_jsonrpc_session *s)
+{
+ return s->remote->server->up.db->schema->name;
+}
+
+static struct jsonrpc_msg *
+ovsdb_jsonrpc_check_db_name(const struct ovsdb_jsonrpc_session *s,
+ const struct jsonrpc_msg *request)
+{
+ struct json_array *params;
+ const char *want_db_name;
+ const char *have_db_name;
+ struct ovsdb_error *error;
+ struct jsonrpc_msg *reply;
+
+ params = json_array(request->params);
+ if (!params->n || params->elems[0]->type != JSON_STRING) {
+ error = ovsdb_syntax_error(
+ request->params, NULL,
+ "%s request params must begin with <db-name>", request->method);
+ goto error;
+ }
+
+ want_db_name = params->elems[0]->u.string;
+ have_db_name = get_db_name(s);
+ if (strcmp(want_db_name, have_db_name)) {
+ error = ovsdb_syntax_error(
+ request->params, "unknown database",
+ "%s request specifies unknown database %s",
+ request->method, want_db_name);
+ goto error;
+ }
+
+ return NULL;
+
+error:
+ reply = jsonrpc_create_reply(ovsdb_error_to_json(error), request->id);
+ ovsdb_error_destroy(error);
+ 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_server_listen(struct ovsdb_jsonrpc_server *svr,
- struct pstream *pstream)
+ovsdb_jsonrpc_session_notify(struct ovsdb_session *session,
+ const char *lock_name,
+ const char *method)
{
- if (svr->n_listeners >= svr->allocated_listeners) {
- svr->listeners = x2nrealloc(svr->listeners, &svr->allocated_listeners,
- sizeof *svr->listeners);
+ 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)
+{
+ ovsdb_jsonrpc_trigger_create(s, request->id, request->params);
+ request->id = NULL;
+ request->params = NULL;
+ jsonrpc_msg_destroy(request);
+ return NULL;
+}
+
+static void
+ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *s,
+ struct jsonrpc_msg *request)
+{
+ struct jsonrpc_msg *reply;
+
+ if (!strcmp(request->method, "transact")) {
+ reply = ovsdb_jsonrpc_check_db_name(s, request);
+ if (!reply) {
+ reply = execute_transaction(s, request);
+ }
+ } else if (!strcmp(request->method, "monitor")) {
+ reply = ovsdb_jsonrpc_check_db_name(s, request);
+ if (!reply) {
+ reply = jsonrpc_create_reply(
+ ovsdb_jsonrpc_monitor_create(s, request->params), request->id);
+ }
+ } else if (!strcmp(request->method, "monitor_cancel")) {
+ reply = ovsdb_jsonrpc_monitor_cancel(s, json_array(request->params),
+ request->id);
+ } else if (!strcmp(request->method, "get_schema")) {
+ reply = ovsdb_jsonrpc_check_db_name(s, request);
+ if (!reply) {
+ reply = jsonrpc_create_reply(
+ ovsdb_schema_to_json(s->remote->server->up.db->schema),
+ request->id);
+ }
+ } else if (!strcmp(request->method, "list_dbs")) {
+ 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 {
+ reply = jsonrpc_create_error(json_string_create("unknown method"),
+ request->id);
+ }
+
+ if (reply) {
+ jsonrpc_msg_destroy(request);
+ jsonrpc_session_send(s->js, reply);
+ }
+}
+
+static void
+execute_cancel(struct ovsdb_jsonrpc_session *s, struct jsonrpc_msg *request)
+{
+ if (json_array(request->params)->n == 1) {
+ struct ovsdb_jsonrpc_trigger *t;
+ struct json *id;
+
+ id = request->params->u.array.elems[0];
+ t = ovsdb_jsonrpc_trigger_find(s, id, json_hash(id, 0));
+ if (t) {
+ ovsdb_jsonrpc_trigger_complete(t);
+ }
+ }
+}
+
+static void
+ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *s,
+ struct jsonrpc_msg *request)
+{
+ if (!strcmp(request->method, "cancel")) {
+ execute_cancel(s, request);
+ }
+ jsonrpc_msg_destroy(request);
+}
+\f
+/* JSON-RPC database server triggers.
+ *
+ * (Every transaction is treated as a trigger even if it doesn't actually have
+ * any "wait" operations.) */
+
+struct ovsdb_jsonrpc_trigger {
+ struct ovsdb_trigger trigger;
+ struct hmap_node hmap_node; /* In session's "triggers" hmap. */
+ struct json *id;
+};
+
+static void
+ovsdb_jsonrpc_trigger_create(struct ovsdb_jsonrpc_session *s,
+ struct json *id, struct json *params)
+{
+ struct ovsdb_jsonrpc_trigger *t;
+ size_t hash;
+
+ /* Check for duplicate ID. */
+ hash = json_hash(id, 0);
+ t = ovsdb_jsonrpc_trigger_find(s, id, hash);
+ if (t) {
+ struct jsonrpc_msg *msg;
+
+ msg = jsonrpc_create_error(json_string_create("duplicate request ID"),
+ id);
+ jsonrpc_session_send(s->js, msg);
+ json_destroy(id);
+ json_destroy(params);
+ return;
+ }
+
+ /* Insert into trigger table. */
+ t = xmalloc(sizeof *t);
+ ovsdb_trigger_init(&s->up, &t->trigger, params, time_msec());
+ t->id = id;
+ hmap_insert(&s->triggers, &t->hmap_node, hash);
+
+ /* Complete early if possible. */
+ if (ovsdb_trigger_is_complete(&t->trigger)) {
+ ovsdb_jsonrpc_trigger_complete(t);
}
- svr->listeners[svr->n_listeners++] = pstream;
}
static struct ovsdb_jsonrpc_trigger *
{
struct ovsdb_jsonrpc_trigger *t;
- HMAP_FOR_EACH_WITH_HASH (t, struct ovsdb_jsonrpc_trigger, hmap_node, hash,
- &s->triggers) {
+ HMAP_FOR_EACH_WITH_HASH (t, hmap_node, hash, &s->triggers) {
if (json_equal(t->id, id)) {
return t;
}
static void
ovsdb_jsonrpc_trigger_complete(struct ovsdb_jsonrpc_trigger *t)
{
- struct ovsdb_jsonrpc_session *s = t->session;
+ struct ovsdb_jsonrpc_session *s;
- if (!jsonrpc_get_status(s->rpc)) {
+ s = CONTAINER_OF(t->trigger.session, struct ovsdb_jsonrpc_session, up);
+
+ if (jsonrpc_session_is_connected(s->js)) {
struct jsonrpc_msg *reply;
struct json *result;
reply = jsonrpc_create_error(json_string_create("canceled"),
t->id);
}
- jsonrpc_send(s->rpc, reply);
+ jsonrpc_session_send(s->js, reply);
}
json_destroy(t->id);
}
static void
-ovsdb_jsonrpc_session_open(struct ovsdb_jsonrpc_server *svr,
- struct stream *stream)
+ovsdb_jsonrpc_trigger_complete_all(struct ovsdb_jsonrpc_session *s)
{
- struct ovsdb_jsonrpc_session *s;
+ struct ovsdb_jsonrpc_trigger *t, *next;
+ HMAP_FOR_EACH_SAFE (t, next, hmap_node, &s->triggers) {
+ ovsdb_jsonrpc_trigger_complete(t);
+ }
+}
- s = xzalloc(sizeof *s);
- s->server = svr;
- list_push_back(&svr->sessions, &s->node);
- s->rpc = jsonrpc_open(stream);
- hmap_init(&s->triggers);
- list_init(&s->completions);
- svr->n_sessions++;
+static void
+ovsdb_jsonrpc_trigger_complete_done(struct ovsdb_jsonrpc_session *s)
+{
+ while (!list_is_empty(&s->up.completions)) {
+ struct ovsdb_jsonrpc_trigger *t
+ = CONTAINER_OF(s->up.completions.next,
+ struct ovsdb_jsonrpc_trigger, trigger.node);
+ ovsdb_jsonrpc_trigger_complete(t);
+ }
+}
+\f
+/* JSON-RPC database table monitors. */
+
+enum ovsdb_jsonrpc_monitor_selection {
+ OJMS_INITIAL = 1 << 0, /* All rows when monitor is created. */
+ OJMS_INSERT = 1 << 1, /* New rows. */
+ OJMS_DELETE = 1 << 2, /* Deleted rows. */
+ OJMS_MODIFY = 1 << 3 /* Modified rows. */
+};
+
+/* A particular column being monitored. */
+struct ovsdb_jsonrpc_monitor_column {
+ const struct ovsdb_column *column;
+ enum ovsdb_jsonrpc_monitor_selection select;
+};
+
+/* A particular table being monitored. */
+struct ovsdb_jsonrpc_monitor_table {
+ const struct ovsdb_table *table;
+
+ /* This is the union (bitwise-OR) of the 'select' values in all of the
+ * members of 'columns' below. */
+ enum ovsdb_jsonrpc_monitor_selection select;
+
+ /* Columns being monitored. */
+ struct ovsdb_jsonrpc_monitor_column *columns;
+ size_t n_columns;
+};
+
+/* A collection of tables being monitored. */
+struct ovsdb_jsonrpc_monitor {
+ struct ovsdb_replica replica;
+ struct ovsdb_jsonrpc_session *session;
+ struct hmap_node node; /* In ovsdb_jsonrpc_session's "monitors". */
+
+ struct json *monitor_id;
+ struct shash tables; /* Holds "struct ovsdb_jsonrpc_monitor_table"s. */
+};
+
+static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class;
+
+struct ovsdb_jsonrpc_monitor *ovsdb_jsonrpc_monitor_find(
+ struct ovsdb_jsonrpc_session *, const struct json *monitor_id);
+static void ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *);
+static struct json *ovsdb_jsonrpc_monitor_get_initial(
+ const struct ovsdb_jsonrpc_monitor *);
+
+static bool
+parse_bool(struct ovsdb_parser *parser, const char *name, bool default_value)
+{
+ const struct json *json;
+
+ json = ovsdb_parser_member(parser, name, OP_BOOLEAN | OP_OPTIONAL);
+ return json ? json_boolean(json) : default_value;
+}
+
+struct ovsdb_jsonrpc_monitor *
+ovsdb_jsonrpc_monitor_find(struct ovsdb_jsonrpc_session *s,
+ const struct json *monitor_id)
+{
+ struct ovsdb_jsonrpc_monitor *m;
+
+ HMAP_FOR_EACH_WITH_HASH (m, node, json_hash(monitor_id, 0), &s->monitors) {
+ if (json_equal(m->monitor_id, monitor_id)) {
+ return m;
+ }
+ }
+
+ return NULL;
}
static void
-ovsdb_jsonrpc_session_close(struct ovsdb_jsonrpc_session *s)
+ovsdb_jsonrpc_add_monitor_column(struct ovsdb_jsonrpc_monitor_table *mt,
+ const struct ovsdb_column *column,
+ enum ovsdb_jsonrpc_monitor_selection select,
+ size_t *allocated_columns)
{
- struct ovsdb_jsonrpc_trigger *t, *next;
+ struct ovsdb_jsonrpc_monitor_column *c;
- jsonrpc_error(s->rpc, EOF);
- HMAP_FOR_EACH_SAFE (t, next, struct ovsdb_jsonrpc_trigger, hmap_node,
- &s->triggers) {
- ovsdb_jsonrpc_trigger_complete(t);
+ if (mt->n_columns >= *allocated_columns) {
+ mt->columns = x2nrealloc(mt->columns, allocated_columns,
+ sizeof *mt->columns);
}
- jsonrpc_close(s->rpc);
+ c = &mt->columns[mt->n_columns++];
+ c->column = column;
+ c->select = select;
+}
- list_remove(&s->node);
- s->server->n_sessions--;
+static int
+compare_ovsdb_jsonrpc_monitor_column(const void *a_, const void *b_)
+{
+ const struct ovsdb_jsonrpc_monitor_column *a = a_;
+ const struct ovsdb_jsonrpc_monitor_column *b = b_;
+
+ return a->column < b->column ? -1 : a->column > b->column;
}
-static struct jsonrpc_msg *
-execute_transaction(struct ovsdb_jsonrpc_session *s,
- struct jsonrpc_msg *request)
+static struct ovsdb_error * WARN_UNUSED_RESULT
+ovsdb_jsonrpc_parse_monitor_request(struct ovsdb_jsonrpc_monitor_table *mt,
+ const struct json *monitor_request,
+ size_t *allocated_columns)
{
- struct ovsdb_jsonrpc_trigger *t;
- size_t hash;
+ const struct ovsdb_table_schema *ts = mt->table->schema;
+ enum ovsdb_jsonrpc_monitor_selection select;
+ const struct json *columns, *select_json;
+ struct ovsdb_parser parser;
+ struct ovsdb_error *error;
- /* Check for duplicate ID. */
- hash = json_hash(request->id, 0);
- t = ovsdb_jsonrpc_trigger_find(s, request->id, hash);
- if (t) {
- return jsonrpc_create_error(
- json_string_create("duplicate request ID"), request->id);
+ ovsdb_parser_init(&parser, monitor_request, "table %s", ts->name);
+ columns = ovsdb_parser_member(&parser, "columns", OP_ARRAY | OP_OPTIONAL);
+ select_json = ovsdb_parser_member(&parser, "select",
+ OP_OBJECT | OP_OPTIONAL);
+ error = ovsdb_parser_finish(&parser);
+ if (error) {
+ return error;
}
- /* Insert into trigger table. */
- t = xmalloc(sizeof *t);
- ovsdb_trigger_init(s->server->db,
- &t->trigger, request->params, &s->completions,
- time_msec());
- t->session = s;
- t->id = request->id;
- hmap_insert(&s->triggers, &t->hmap_node, hash);
+ if (select_json) {
+ select = 0;
+ ovsdb_parser_init(&parser, select_json, "table %s select", ts->name);
+ if (parse_bool(&parser, "initial", true)) {
+ select |= OJMS_INITIAL;
+ }
+ if (parse_bool(&parser, "insert", true)) {
+ select |= OJMS_INSERT;
+ }
+ if (parse_bool(&parser, "delete", true)) {
+ select |= OJMS_DELETE;
+ }
+ if (parse_bool(&parser, "modify", true)) {
+ select |= OJMS_MODIFY;
+ }
+ error = ovsdb_parser_finish(&parser);
+ if (error) {
+ return error;
+ }
+ } else {
+ select = OJMS_INITIAL | OJMS_INSERT | OJMS_DELETE | OJMS_MODIFY;
+ }
+ mt->select |= select;
- request->id = NULL;
- request->params = NULL;
+ if (columns) {
+ size_t i;
- /* Complete early if possible. */
- if (ovsdb_trigger_is_complete(&t->trigger)) {
- ovsdb_jsonrpc_trigger_complete(t);
+ if (columns->type != JSON_ARRAY) {
+ return ovsdb_syntax_error(columns, NULL,
+ "array of column names expected");
+ }
+
+ for (i = 0; i < columns->u.array.n; i++) {
+ const struct ovsdb_column *column;
+ const char *s;
+
+ if (columns->u.array.elems[i]->type != JSON_STRING) {
+ return ovsdb_syntax_error(columns, NULL,
+ "array of column names expected");
+ }
+
+ s = columns->u.array.elems[i]->u.string;
+ column = shash_find_data(&mt->table->schema->columns, s);
+ if (!column) {
+ return ovsdb_syntax_error(columns, NULL, "%s is not a valid "
+ "column name", s);
+ }
+ ovsdb_jsonrpc_add_monitor_column(mt, column, select,
+ allocated_columns);
+ }
+ } else {
+ struct shash_node *node;
+
+ SHASH_FOR_EACH (node, &ts->columns) {
+ const struct ovsdb_column *column = node->data;
+ if (column->index != OVSDB_COL_UUID) {
+ ovsdb_jsonrpc_add_monitor_column(mt, column, select,
+ allocated_columns);
+ }
+ }
}
return NULL;
}
-static void
-ovsdb_jsonrpc_session_got_request(struct ovsdb_jsonrpc_session *s,
- struct jsonrpc_msg *request)
+static struct json *
+ovsdb_jsonrpc_monitor_create(struct ovsdb_jsonrpc_session *s,
+ struct json *params)
{
- struct jsonrpc_msg *reply;
+ struct ovsdb_jsonrpc_monitor *m = NULL;
+ struct json *monitor_id, *monitor_requests;
+ struct ovsdb_error *error = NULL;
+ struct shash_node *node;
+ struct json *json;
- if (!strcmp(request->method, "transact")) {
- reply = execute_transaction(s, request);
- } else if (!strcmp(request->method, "get_schema")) {
- reply = jsonrpc_create_reply(
- ovsdb_schema_to_json(s->server->db->schema), request->id);
+ if (json_array(params)->n != 3) {
+ error = ovsdb_syntax_error(params, NULL, "invalid parameters");
+ goto error;
+ }
+ monitor_id = params->u.array.elems[1];
+ monitor_requests = params->u.array.elems[2];
+ if (monitor_requests->type != JSON_OBJECT) {
+ error = ovsdb_syntax_error(monitor_requests, NULL,
+ "monitor-requests must be object");
+ goto error;
+ }
+
+ if (ovsdb_jsonrpc_monitor_find(s, monitor_id)) {
+ error = ovsdb_syntax_error(monitor_id, NULL, "duplicate monitor ID");
+ goto error;
+ }
+
+ m = xzalloc(sizeof *m);
+ ovsdb_replica_init(&m->replica, &ovsdb_jsonrpc_replica_class);
+ ovsdb_add_replica(s->remote->server->up.db, &m->replica);
+ m->session = s;
+ hmap_insert(&s->monitors, &m->node, json_hash(monitor_id, 0));
+ m->monitor_id = json_clone(monitor_id);
+ shash_init(&m->tables);
+
+ SHASH_FOR_EACH (node, json_object(monitor_requests)) {
+ const struct ovsdb_table *table;
+ struct ovsdb_jsonrpc_monitor_table *mt;
+ size_t allocated_columns;
+ const struct json *mr_value;
+ size_t i;
+
+ table = ovsdb_get_table(s->remote->server->up.db, node->name);
+ if (!table) {
+ error = ovsdb_syntax_error(NULL, NULL,
+ "no table named %s", node->name);
+ goto error;
+ }
+
+ mt = xzalloc(sizeof *mt);
+ mt->table = table;
+ shash_add(&m->tables, table->schema->name, mt);
+
+ /* Parse columns. */
+ mr_value = node->data;
+ allocated_columns = 0;
+ if (mr_value->type == JSON_ARRAY) {
+ const struct json_array *array = &mr_value->u.array;
+
+ for (i = 0; i < array->n; i++) {
+ error = ovsdb_jsonrpc_parse_monitor_request(
+ mt, array->elems[i], &allocated_columns);
+ if (error) {
+ goto error;
+ }
+ }
+ } else {
+ error = ovsdb_jsonrpc_parse_monitor_request(
+ mt, mr_value, &allocated_columns);
+ if (error) {
+ goto error;
+ }
+ }
+
+ /* Check for duplicate columns. */
+ qsort(mt->columns, mt->n_columns, sizeof *mt->columns,
+ compare_ovsdb_jsonrpc_monitor_column);
+ for (i = 1; i < mt->n_columns; i++) {
+ if (mt->columns[i].column == mt->columns[i - 1].column) {
+ error = ovsdb_syntax_error(mr_value, NULL, "column %s "
+ "mentioned more than once",
+ mt->columns[i].column->name);
+ goto error;
+ }
+ }
+ }
+
+ return ovsdb_jsonrpc_monitor_get_initial(m);
+
+error:
+ if (m) {
+ ovsdb_remove_replica(s->remote->server->up.db, &m->replica);
+ }
+
+ json = ovsdb_error_to_json(error);
+ ovsdb_error_destroy(error);
+ return json;
+}
+
+static struct jsonrpc_msg *
+ovsdb_jsonrpc_monitor_cancel(struct ovsdb_jsonrpc_session *s,
+ struct json_array *params,
+ const struct json *request_id)
+{
+ if (params->n != 1) {
+ return jsonrpc_create_error(json_string_create("invalid parameters"),
+ request_id);
} else {
- reply = jsonrpc_create_error(json_string_create("unknown method"),
- request->id);
+ struct ovsdb_jsonrpc_monitor *m;
+
+ m = ovsdb_jsonrpc_monitor_find(s, params->elems[0]);
+ if (!m) {
+ return jsonrpc_create_error(json_string_create("unknown monitor"),
+ request_id);
+ } else {
+ ovsdb_remove_replica(s->remote->server->up.db, &m->replica);
+ return jsonrpc_create_reply(json_object_create(), request_id);
+ }
}
+}
- if (reply) {
- jsonrpc_msg_destroy(request);
- jsonrpc_send(s->rpc, reply);
+static void
+ovsdb_jsonrpc_monitor_remove_all(struct ovsdb_jsonrpc_session *s)
+{
+ struct ovsdb_jsonrpc_monitor *m, *next;
+
+ HMAP_FOR_EACH_SAFE (m, next, node, &s->monitors) {
+ ovsdb_remove_replica(s->remote->server->up.db, &m->replica);
}
}
+static struct ovsdb_jsonrpc_monitor *
+ovsdb_jsonrpc_monitor_cast(struct ovsdb_replica *replica)
+{
+ assert(replica->class == &ovsdb_jsonrpc_replica_class);
+ return CONTAINER_OF(replica, struct ovsdb_jsonrpc_monitor, replica);
+}
+
+struct ovsdb_jsonrpc_monitor_aux {
+ bool initial; /* Sending initial contents of table? */
+ const struct ovsdb_jsonrpc_monitor *monitor;
+ struct json *json; /* JSON for the whole transaction. */
+
+ /* Current table. */
+ struct ovsdb_jsonrpc_monitor_table *mt;
+ struct json *table_json; /* JSON for table's transaction. */
+};
+
+static bool
+any_reportable_change(const struct ovsdb_jsonrpc_monitor_table *mt,
+ const unsigned long int *changed)
+{
+ size_t i;
+
+ for (i = 0; i < mt->n_columns; i++) {
+ const struct ovsdb_jsonrpc_monitor_column *c = &mt->columns[i];
+ unsigned int idx = c->column->index;
+
+ if (c->select & OJMS_MODIFY && bitmap_is_set(changed, idx)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool
+ovsdb_jsonrpc_monitor_change_cb(const struct ovsdb_row *old,
+ const struct ovsdb_row *new,
+ const unsigned long int *changed,
+ void *aux_)
+{
+ struct ovsdb_jsonrpc_monitor_aux *aux = aux_;
+ const struct ovsdb_jsonrpc_monitor *m = aux->monitor;
+ struct ovsdb_table *table = new ? new->table : old->table;
+ enum ovsdb_jsonrpc_monitor_selection type;
+ struct json *old_json, *new_json;
+ struct json *row_json;
+ char uuid[UUID_LEN + 1];
+ size_t i;
+
+ if (!aux->mt || table != aux->mt->table) {
+ aux->mt = shash_find_data(&m->tables, table->schema->name);
+ aux->table_json = NULL;
+ if (!aux->mt) {
+ /* We don't care about rows in this table at all. Tell the caller
+ * to skip it. */
+ return false;
+ }
+ }
+
+ type = (aux->initial ? OJMS_INITIAL
+ : !old ? OJMS_INSERT
+ : !new ? OJMS_DELETE
+ : OJMS_MODIFY);
+ if (!(aux->mt->select & type)) {
+ /* We don't care about this type of change (but do want to be called
+ * back for changes to other rows in the same table). */
+ return true;
+ }
+
+ if (type == OJMS_MODIFY && !any_reportable_change(aux->mt, changed)) {
+ /* Nothing of interest changed. */
+ return true;
+ }
+
+ old_json = new_json = NULL;
+ if (type & (OJMS_DELETE | OJMS_MODIFY)) {
+ old_json = json_object_create();
+ }
+ if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) {
+ new_json = json_object_create();
+ }
+ for (i = 0; i < aux->mt->n_columns; i++) {
+ const struct ovsdb_jsonrpc_monitor_column *c = &aux->mt->columns[i];
+ const struct ovsdb_column *column = c->column;
+ unsigned int idx = c->column->index;
+
+ if (!(type & c->select)) {
+ /* We don't care about this type of change for this particular
+ * column (but we will care about it for some other column). */
+ continue;
+ }
+
+ if ((type == OJMS_MODIFY && bitmap_is_set(changed, idx))
+ || type == OJMS_DELETE) {
+ json_object_put(old_json, column->name,
+ ovsdb_datum_to_json(&old->fields[idx],
+ &column->type));
+ }
+ if (type & (OJMS_INITIAL | OJMS_INSERT | OJMS_MODIFY)) {
+ json_object_put(new_json, column->name,
+ ovsdb_datum_to_json(&new->fields[idx],
+ &column->type));
+ }
+ }
+
+ /* Create JSON object for transaction overall. */
+ if (!aux->json) {
+ aux->json = json_object_create();
+ }
+
+ /* Create JSON object for transaction on this table. */
+ if (!aux->table_json) {
+ aux->table_json = json_object_create();
+ json_object_put(aux->json, aux->mt->table->schema->name,
+ aux->table_json);
+ }
+
+ /* Create JSON object for transaction on this row. */
+ row_json = json_object_create();
+ if (old_json) {
+ json_object_put(row_json, "old", old_json);
+ }
+ if (new_json) {
+ json_object_put(row_json, "new", new_json);
+ }
+
+ /* Add JSON row to JSON table. */
+ snprintf(uuid, sizeof uuid,
+ UUID_FMT, UUID_ARGS(ovsdb_row_get_uuid(new ? new : old)));
+ json_object_put(aux->table_json, uuid, row_json);
+
+ return true;
+}
+
static void
-execute_cancel(struct ovsdb_jsonrpc_session *s, struct jsonrpc_msg *request)
+ovsdb_jsonrpc_monitor_init_aux(struct ovsdb_jsonrpc_monitor_aux *aux,
+ const struct ovsdb_jsonrpc_monitor *m,
+ bool initial)
{
- size_t hash = json_hash(request->id, 0);
- struct ovsdb_jsonrpc_trigger *t;
+ aux->initial = initial;
+ aux->monitor = m;
+ aux->json = NULL;
+ aux->mt = NULL;
+ aux->table_json = NULL;
+}
- t = ovsdb_jsonrpc_trigger_find(s, request->params, hash);
- if (t) {
- ovsdb_jsonrpc_trigger_complete(t);
+static struct ovsdb_error *
+ovsdb_jsonrpc_monitor_commit(struct ovsdb_replica *replica,
+ const struct ovsdb_txn *txn,
+ bool durable OVS_UNUSED)
+{
+ struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
+ struct ovsdb_jsonrpc_monitor_aux aux;
+
+ ovsdb_jsonrpc_monitor_init_aux(&aux, m, false);
+ ovsdb_txn_for_each_change(txn, ovsdb_jsonrpc_monitor_change_cb, &aux);
+ if (aux.json) {
+ struct jsonrpc_msg *msg;
+ struct json *params;
+
+ params = json_array_create_2(json_clone(aux.monitor->monitor_id),
+ aux.json);
+ msg = jsonrpc_create_notify("update", params);
+ jsonrpc_session_send(aux.monitor->session->js, msg);
}
+
+ return NULL;
+}
+
+static struct json *
+ovsdb_jsonrpc_monitor_get_initial(const struct ovsdb_jsonrpc_monitor *m)
+{
+ struct ovsdb_jsonrpc_monitor_aux aux;
+ struct shash_node *node;
+
+ ovsdb_jsonrpc_monitor_init_aux(&aux, m, true);
+ SHASH_FOR_EACH (node, &m->tables) {
+ struct ovsdb_jsonrpc_monitor_table *mt = node->data;
+
+ if (mt->select & OJMS_INITIAL) {
+ struct ovsdb_row *row;
+
+ HMAP_FOR_EACH (row, hmap_node, &mt->table->rows) {
+ ovsdb_jsonrpc_monitor_change_cb(NULL, row, NULL, &aux);
+ }
+ }
+ }
+ return aux.json ? aux.json : json_object_create();
}
static void
-ovsdb_jsonrpc_session_got_notify(struct ovsdb_jsonrpc_session *s,
- struct jsonrpc_msg *request)
+ovsdb_jsonrpc_monitor_destroy(struct ovsdb_replica *replica)
{
- if (!strcmp(request->method, "cancel")) {
- execute_cancel(s, request);
+ struct ovsdb_jsonrpc_monitor *m = ovsdb_jsonrpc_monitor_cast(replica);
+ struct shash_node *node;
+
+ json_destroy(m->monitor_id);
+ SHASH_FOR_EACH (node, &m->tables) {
+ struct ovsdb_jsonrpc_monitor_table *mt = node->data;
+ free(mt->columns);
+ free(mt);
}
- jsonrpc_msg_destroy(request);
+ shash_destroy(&m->tables);
+ hmap_remove(&m->session->monitors, &m->node);
+ free(m);
}
+
+static const struct ovsdb_replica_class ovsdb_jsonrpc_replica_class = {
+ ovsdb_jsonrpc_monitor_commit,
+ ovsdb_jsonrpc_monitor_destroy
+};
git://git.onelab.eu / sliver-openvswitch.git / blobdiff