#include <sys/types.h>
#include <unistd.h>
+#include <urcu/compiler.h>
#include <lttngerr.h>
#include <lttng-share.h>
return NULL;
}
+/*
+ * Disable the specified event on to UST tracer for the UST session.
+ */
+static int disable_ust_event(struct ust_app *app,
+ struct ust_app_session *ua_sess, struct ust_app_event *ua_event)
+{
+ int ret;
+
+ ret = ustctl_disable(app->key.sock, ua_event->obj);
+ if (ret < 0) {
+ ERR("UST app event %s disable failed for app (pid: %d) "
+ "and session handle %d with ret %d",
+ ua_event->attr.name, app->key.pid, ua_sess->handle, ret);
+ goto error;
+ }
+
+ DBG2("UST app event %s disabled successfully for app (pid: %d)",
+ ua_event->attr.name, app->key.pid);
+
+error:
+ return ret;
+}
+
+/*
+ * Disable the specified channel on to UST tracer for the UST session.
+ */
+static int disable_ust_channel(struct ust_app *app,
+ struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan)
+{
+ int ret;
+
+ ret = ustctl_disable(app->key.sock, ua_chan->obj);
+ if (ret < 0) {
+ ERR("UST app channel %s disable failed for app (pid: %d) "
+ "and session handle %d with ret %d",
+ ua_chan->name, app->key.pid, ua_sess->handle, ret);
+ goto error;
+ }
+
+ ua_chan->enabled = 0;
+
+ DBG2("UST app channel %s disabled successfully for app (pid: %d)",
+ ua_chan->name, app->key.pid);
+
+error:
+ return ret;
+}
+
+/*
+ * Enable the specified channel on to UST tracer for the UST session.
+ */
+static int enable_ust_channel(struct ust_app *app,
+ struct ust_app_session *ua_sess, struct ust_app_channel *ua_chan)
+{
+ int ret;
+
+ ret = ustctl_enable(app->key.sock, ua_chan->obj);
+ if (ret < 0) {
+ ERR("UST app channel %s enable failed for app (pid: %d) "
+ "and session handle %d with ret %d",
+ ua_chan->name, app->key.pid, ua_sess->handle, ret);
+ goto error;
+ }
+
+ ua_chan->enabled = 1;
+
+ DBG2("UST app channel %s enabled successfully for app (pid: %d)",
+ ua_chan->name, app->key.pid);
+
+error:
+ return ret;
+}
+
/*
* Open metadata onto the UST tracer for a UST session.
*/
}
}
+/*
+ * Lookup sesison wrapper.
+ */
static
void __lookup_session_by_app(struct ltt_ust_session *usess,
struct ust_app *app, struct cds_lfht_iter *iter)
return NULL;
}
+/*
+ * Disable on the tracer side a ust app event for the session and channel.
+ */
+static int disable_ust_app_event(struct ust_app_session *ua_sess,
+ struct ust_app_channel *ua_chan, struct ust_app_event *ua_event,
+ struct ust_app *app)
+{
+ int ret;
+
+ ret = disable_ust_event(app, ua_sess, ua_event);
+ if (ret < 0) {
+ goto error;
+ }
+
+ ua_event->enabled = 0;
+
+error:
+ return ret;
+}
+
+/*
+ * Lookup ust app channel for session and disable it on the tracer side.
+ */
+static int disable_ust_app_channel(struct ust_app_session *ua_sess,
+ struct ltt_ust_channel *uchan, struct ust_app *app)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app_channel *ua_chan;
+
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ DBG2("Unable to find channel %s in ust session uid %u",
+ uchan->name, ua_sess->uid);
+ goto error;
+ }
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ret = disable_ust_channel(app, ua_sess, ua_chan);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Lookup ust app channel for session and enable it on the tracer side.
+ */
+static int enable_ust_app_channel(struct ust_app_session *ua_sess,
+ struct ltt_ust_channel *uchan, struct ust_app *app)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app_channel *ua_chan;
+
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ DBG2("Unable to find channel %s in ust session uid %u",
+ uchan->name, ua_sess->uid);
+ goto error;
+ }
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ret = enable_ust_channel(app, ua_sess, ua_chan);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
/*
* Create UST app channel and create it on the tracer.
*/
* Using pid and uid (of the app), allocate a new ust_app struct and
* add it to the global traceable app list.
*
- * On success, return 0, else return malloc ENOMEM.
+ * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app
+ * bitness is not supported.
*/
int ust_app_register(struct ust_register_msg *msg, int sock)
{
struct ust_app *lta;
+ if ((msg->bits_per_long == 64 && ust_consumerd64_fd == -EINVAL)
+ || (msg->bits_per_long == 32 && ust_consumerd32_fd == -EINVAL)) {
+ ERR("Registration failed: application \"%s\" (pid: %d) has "
+ "%d-bit long, but no consumerd for this long size is available.\n",
+ msg->name, msg->pid, msg->bits_per_long);
+ close(sock);
+ return -EINVAL;
+ }
lta = zmalloc(sizeof(struct ust_app));
if (lta == NULL) {
PERROR("malloc");
lta->ppid = msg->ppid;
lta->uid = msg->uid;
lta->gid = msg->gid;
+ lta->bits_per_long = msg->bits_per_long;
lta->v_major = msg->major;
lta->v_minor = msg->minor;
strncpy(lta->name, msg->name, sizeof(lta->name));
rcu_read_lock();
- cds_lfht_for_each(ust_app_ht, &iter, node) {
- app = caa_container_of(node, struct ust_app, node);
-
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
ret = hashtable_del(ust_app_ht, &iter);
if (!ret) {
call_rcu(&node->head, delete_ust_app_rcu);
ust_app_sock_key_map = hashtable_new(0);
}
+/*
+ * For a specific UST session, disable the channel for all registered apps.
+ */
+int ust_app_disable_channel_all(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+
+ if (usess == NULL || uchan == NULL) {
+ ERR("Disabling UST global channel with NULL values");
+ ret = -1;
+ goto error;
+ }
+
+ DBG2("UST app disablling channel %s from global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For every registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Create channel onto application */
+ ret = disable_ust_app_channel(ua_sess, uchan, app);
+ if (ret < 0) {
+ /* XXX: We might want to report this error at some point... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * For a specific UST session, enable the channel for all registered apps.
+ */
+int ust_app_enable_channel_all(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+
+ if (usess == NULL || uchan == NULL) {
+ ERR("Adding UST global channel to NULL values");
+ ret = -1;
+ goto error;
+ }
+
+ DBG2("UST app enabling channel %s to global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For every registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Enable channel onto application */
+ ret = enable_ust_app_channel(ua_sess, uchan, app);
+ if (ret < 0) {
+ /* XXX: We might want to report this error at some point... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * Disable an event in a channel and for a specific session.
+ */
+int ust_app_disable_event(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, char *event_name)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node, *ua_event_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ DBG("UST app disabling event %s for all apps in channel "
+ "%s for session uid %d", event_name, uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* Next app */
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &uiter);
+ if (ua_chan_node == NULL) {
+ DBG2("Channel %s not found in session uid %d for app pid %d."
+ "Skipping", uchan->name, usess->uid, app->key.pid);
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ua_event_node = hashtable_lookup(ua_chan->events,
+ (void *) event_name, strlen(event_name), &uiter);
+ if (ua_event_node == NULL) {
+ DBG2("Event %s not found in channel %s for app pid %d."
+ "Skipping", event_name, uchan->name, app->key.pid);
+ continue;
+ }
+ ua_event = caa_container_of(ua_event_node, struct ust_app_event, node);
+
+ ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app);
+ if (ret < 0) {
+ /* XXX: Report error someday... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/*
+ * For a specific UST session and UST channel, create the event for all
+ * registered apps.
+ */
+int ust_app_disable_event_all(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ DBG("UST app disabling all event for all apps in channel "
+ "%s for session uid %d", uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* Next app */
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name),
+ &uiter);
+ if (ua_chan_node == NULL) {
+ DBG2("Channel %s not found in session uid %d for app pid %d."
+ "Skipping", uchan->name, app->key.pid, usess->uid);
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ /* Disable each events of channel */
+ cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) {
+ ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app);
+ if (ret < 0) {
+ /* XXX: Report error someday... */
+ continue;
+ }
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
/*
* For a specific UST session, create the channel for all registered apps.
*/
struct ust_app_session *ua_sess;
struct ust_app_channel *ua_chan;
struct ltt_ust_stream *ustream;
+ int consumerd_fd;
DBG("Starting tracing for ust app pid %d", app->key.pid);
goto error_rcu_unlock;
}
- /* upon restart, we skip the setup, already done */
- if (ua_sess->started)
+ /* Upon restart, we skip the setup, already done */
+ if (ua_sess->started) {
goto skip_setup;
+ }
ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
if (ret < 0) {
}
}
+ switch (app->bits_per_long) {
+ case 64:
+ consumerd_fd = ust_consumerd64_fd;
+ break;
+ case 32:
+ consumerd_fd = ust_consumerd32_fd;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_rcu_unlock;
+ }
+
/* Setup UST consumer socket and send fds to it */
- ret = ust_consumer_send_session(ust_consumer_fd, ua_sess);
+ ret = ust_consumer_send_session(consumerd_fd, ua_sess);
if (ret < 0) {
goto error_rcu_unlock;
}
projects / lttng-tools.git / blobdiff