#include "session.h"
#include "lttng-sessiond.h"
#include "notification-thread-commands.h"
+#include "rotation-thread.h"
static
int ust_app_flush_app_session(struct ust_app *app, struct ust_app_session *ua_sess);
attr->switch_timer_interval = uattr->switch_timer_interval;
attr->read_timer_interval = uattr->read_timer_interval;
attr->output = uattr->output;
+ attr->blocking_timeout = uattr->u.s.blocking_timeout;
}
/*
ua_sess->deleted = true;
registry = get_session_registry(ua_sess);
+ /* Registry can be null on error path during initialization. */
if (registry) {
/* Push metadata for application before freeing the application. */
(void) push_metadata(registry, ua_sess->consumer);
if (ua_sess->buffer_type == LTTNG_BUFFER_PER_PID) {
struct buffer_reg_pid *reg_pid = buffer_reg_pid_find(ua_sess->id);
if (reg_pid) {
+ /*
+ * Registry can be null on error path during
+ * initialization.
+ */
buffer_reg_pid_remove(reg_pid);
buffer_reg_pid_destroy(reg_pid);
}
ua_chan->attr.switch_timer_interval = attr->switch_timer_interval;
ua_chan->attr.read_timer_interval = attr->read_timer_interval;
ua_chan->attr.output = attr->output;
+ ua_chan->attr.blocking_timeout = attr->u.s.blocking_timeout;
}
/* By default, the channel is a per cpu channel. */
ua_chan->attr.type = LTTNG_UST_CHAN_PER_CPU;
ua_chan->attr.read_timer_interval = uchan->attr.read_timer_interval;
ua_chan->monitor_timer_interval = uchan->monitor_timer_interval;
ua_chan->attr.output = uchan->attr.output;
+ ua_chan->attr.blocking_timeout = uchan->attr.u.s.blocking_timeout;
+
/*
* Note that the attribute channel type is not set since the channel on the
* tracing registry side does not have this information.
ua_ctx = alloc_ust_app_ctx(uctx);
if (ua_ctx == NULL) {
/* malloc failed */
- ret = -1;
+ ret = -ENOMEM;
goto error;
}
/*
* Ask the consumer to create a channel and get it if successful.
*
+ * Called with UST app session lock held.
+ *
* Return 0 on success or else a negative value.
*/
static int do_consumer_create_channel(struct ltt_ust_session *usess,
/*
* Create and send to the application the created buffers with per PID buffers.
*
+ * Called with UST app session lock held.
+ *
* Return 0 on success else a negative value.
*/
static int create_channel_per_pid(struct ust_app *app,
rcu_read_lock();
registry = get_session_registry(ua_sess);
+ /* The UST app session lock is held, registry shall not be null. */
assert(registry);
/* Create and add a new channel registry to session. */
* need and send it to the application. This MUST be called with a RCU read
* side lock acquired.
*
+ * Called with UST app session lock held.
+ *
* Return 0 on success or else a negative value. Returns -ENOTCONN if
* the application exited concurrently.
*/
assert(consumer);
registry = get_session_registry(ua_sess);
+ /* The UST app session is held registry shall not be null. */
assert(registry);
pthread_mutex_lock(®istry->lock);
/*
* Start tracing for a specific UST session and app.
+ *
+ * Called with UST app session lock held.
+ *
*/
static
int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
/* Create directories if consumer is LOCAL and has a path defined. */
if (usess->consumer->type == CONSUMER_DST_LOCAL &&
- strlen(usess->consumer->dst.trace_path) > 0) {
- ret = run_as_mkdir_recursive(usess->consumer->dst.trace_path,
- S_IRWXU | S_IRWXG, ua_sess->euid, ua_sess->egid);
+ strlen(usess->consumer->dst.session_root_path) > 0) {
+ char *tmp_path;
+
+ tmp_path = zmalloc(PATH_MAX * sizeof(char));
+ if (!tmp_path) {
+ ERR("Alloc tmp_path");
+ goto error_unlock;
+ }
+ snprintf(tmp_path, PATH_MAX, "%s%s%s",
+ usess->consumer->dst.session_root_path,
+ usess->consumer->chunk_path,
+ usess->consumer->subdir);
+ ret = run_as_mkdir_recursive(tmp_path, S_IRWXU | S_IRWXG,
+ ua_sess->euid, ua_sess->egid);
+ free(tmp_path);
if (ret < 0) {
if (errno != EEXIST) {
ERR("Trace directory creation error");
health_code_update();
registry = get_session_registry(ua_sess);
+
+ /* The UST app session is held registry shall not be null. */
assert(registry);
/* Push metadata for application before freeing the application. */
/* Lookup application. If not found, there is a code flow error. */
app = find_app_by_notify_sock(sock);
if (!app) {
- DBG("Application socket %d is being teardown. Abort event notify",
+ DBG("Application socket %d is being torn down. Abort event notify",
sock);
ret = 0;
- free(fields);
goto error_rcu_unlock;
}
/* Lookup channel by UST object descriptor. */
ua_chan = find_channel_by_objd(app, cobjd);
if (!ua_chan) {
- DBG("Application channel is being teardown. Abort event notify");
+ DBG("Application channel is being torn down. Abort event notify");
ret = 0;
- free(fields);
goto error_rcu_unlock;
}
/* Get right session registry depending on the session buffer type. */
registry = get_session_registry(ua_sess);
- assert(registry);
+ if (!registry) {
+ DBG("Application session is being torn down. Abort event notify");
+ ret = 0;
+ goto error_rcu_unlock;
+ };
/* Depending on the buffer type, a different channel key is used. */
if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) {
chan_reg->nr_ctx_fields = nr_fields;
chan_reg->ctx_fields = fields;
+ fields = NULL;
chan_reg->header_type = type;
} else {
/* Get current already assigned values. */
type = chan_reg->header_type;
- free(fields);
- /* Set to NULL so the error path does not do a double free. */
- fields = NULL;
}
/* Channel id is set during the object creation. */
chan_id = chan_reg->chan_id;
pthread_mutex_unlock(®istry->lock);
error_rcu_unlock:
rcu_read_unlock();
- if (ret) {
- free(fields);
- }
+ free(fields);
return ret;
}
/* Lookup application. If not found, there is a code flow error. */
app = find_app_by_notify_sock(sock);
if (!app) {
- DBG("Application socket %d is being teardown. Abort event notify",
+ DBG("Application socket %d is being torn down. Abort event notify",
sock);
ret = 0;
- free(sig);
- free(fields);
- free(model_emf_uri);
goto error_rcu_unlock;
}
/* Lookup channel by UST object descriptor. */
ua_chan = find_channel_by_objd(app, cobjd);
if (!ua_chan) {
- DBG("Application channel is being teardown. Abort event notify");
+ DBG("Application channel is being torn down. Abort event notify");
ret = 0;
- free(sig);
- free(fields);
- free(model_emf_uri);
goto error_rcu_unlock;
}
ua_sess = ua_chan->session;
registry = get_session_registry(ua_sess);
- assert(registry);
+ if (!registry) {
+ DBG("Application session is being torn down. Abort event notify");
+ ret = 0;
+ goto error_rcu_unlock;
+ }
if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) {
chan_reg_key = ua_chan->tracing_channel_id;
sobjd, cobjd, name, sig, nr_fields, fields,
loglevel_value, model_emf_uri, ua_sess->buffer_type,
&event_id, app);
+ sig = NULL;
+ fields = NULL;
+ model_emf_uri = NULL;
/*
* The return value is returned to ustctl so in case of an error, the
pthread_mutex_unlock(®istry->lock);
error_rcu_unlock:
rcu_read_unlock();
+ free(sig);
+ free(fields);
+ free(model_emf_uri);
return ret;
}
ua_sess = find_session_by_objd(app, sobjd);
if (!ua_sess) {
/* Return an error since this is not an error */
- DBG("Application session is being torn down. Aborting enum registration.");
+ DBG("Application session is being torn down (session not found). Aborting enum registration.");
free(entries);
goto error_rcu_unlock;
}
registry = get_session_registry(ua_sess);
- assert(registry);
+ if (!registry) {
+ DBG("Application session is being torn down (registry not found). Aborting enum registration.");
+ free(entries);
+ goto error_rcu_unlock;
+ }
pthread_mutex_lock(®istry->lock);
}
registry = get_session_registry(ua_sess);
- assert(registry);
+ if (!registry) {
+ DBG("Application session is being torn down. Abort snapshot record.");
+ ret = -1;
+ goto error;
+ }
ret = consumer_snapshot_channel(socket, registry->metadata_key, output,
1, ua_sess->euid, ua_sess->egid, pathname, wait, 0);
if (ret < 0) {
int ret;
uint64_t consumer_chan_key;
+ *discarded = 0;
+ *lost = 0;
+
ret = buffer_reg_uid_consumer_channel_key(
buffer_reg_uid_list, ust_session_id,
uchan_id, &consumer_chan_key);
if (ret < 0) {
+ /* Not found */
+ ret = 0;
goto end;
}
if (overwrite) {
ret = consumer_get_lost_packets(ust_session_id,
consumer_chan_key, consumer, lost);
- *discarded = 0;
} else {
ret = consumer_get_discarded_events(ust_session_id,
consumer_chan_key, consumer, discarded);
- *lost = 0;
}
end:
struct ust_app_session *ua_sess;
struct ust_app_channel *ua_chan;
+ *discarded = 0;
+ *lost = 0;
+
rcu_read_lock();
/*
- * Iterate over every registered applications, return when we
- * found one in the right session and channel.
+ * Iterate over every registered applications. Sum counters for
+ * all applications containing requested session and channel.
*/
cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
struct lttng_ht_iter uiter;
ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
if (overwrite) {
+ uint64_t _lost;
+
ret = consumer_get_lost_packets(usess->id, ua_chan->key,
- consumer, lost);
- *discarded = 0;
- goto end;
+ consumer, &_lost);
+ if (ret < 0) {
+ break;
+ }
+ (*lost) += _lost;
} else {
+ uint64_t _discarded;
+
ret = consumer_get_discarded_events(usess->id,
- ua_chan->key, consumer, discarded);
- *lost = 0;
- goto end;
+ ua_chan->key, consumer, &_discarded);
+ if (ret < 0) {
+ break;
+ }
+ (*discarded) += _discarded;
}
}
-end:
rcu_read_unlock();
return ret;
}
return 0;
}
+
+/*
+ * Rotate all the channels of a session.
+ *
+ * Return 0 on success or else a negative value.
+ */
+int ust_app_rotate_session(struct ltt_session *session)
+{
+ int ret = 0, nr_channels = 0, nr_app = 0;
+ struct lttng_ht_iter iter;
+ struct ust_app *app;
+ struct ltt_ust_session *usess = session->ust_session;
+ char *pathname;
+
+ assert(usess);
+
+ rcu_read_lock();
+
+ pathname = zmalloc(PATH_MAX * sizeof(char));
+ if (!pathname) {
+ ERR("Failed to alloc pathname");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ switch (usess->buffer_type) {
+ case LTTNG_BUFFER_PER_UID:
+ {
+ struct buffer_reg_uid *reg;
+
+ cds_list_for_each_entry(reg, &usess->buffer_reg_uid_list, lnode) {
+ struct buffer_reg_channel *reg_chan;
+ struct consumer_socket *socket;
+
+ nr_channels++;
+ /* Get consumer socket to use to push the metadata.*/
+ socket = consumer_find_socket_by_bitness(reg->bits_per_long,
+ usess->consumer);
+ if (!socket) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /*
+ * Account the metadata channel first to make sure the
+ * number of channels waiting for a rotation cannot
+ * reach 0 before we complete the iteration over all
+ * the channels.
+ */
+ ret = rotate_add_channel_pending(
+ reg->registry->reg.ust->metadata_key,
+ LTTNG_DOMAIN_UST, session);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ pthread_mutex_unlock(socket->lock);
+ goto error;
+ }
+
+ ret = snprintf(pathname, PATH_MAX,
+ DEFAULT_UST_TRACE_DIR "/" DEFAULT_UST_TRACE_UID_PATH,
+ reg->uid, reg->bits_per_long);
+ if (ret < 0) {
+ PERROR("snprintf rotate path");
+ pthread_mutex_unlock(socket->lock);
+ goto error;
+ }
+
+ /* Rotate the data channels. */
+ cds_lfht_for_each_entry(reg->registry->channels->ht, &iter.iter,
+ reg_chan, node.node) {
+ ret = rotate_add_channel_pending(
+ reg_chan->consumer_key,
+ LTTNG_DOMAIN_UST, session);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ pthread_mutex_unlock(socket->lock);
+ goto error;
+ }
+ ret = consumer_rotate_channel(socket,
+ reg_chan->consumer_key,
+ usess->uid, usess->gid,
+ usess->consumer, pathname, 0,
+ session->rotate_count);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+
+ (void) push_metadata(reg->registry->reg.ust, usess->consumer);
+
+ ret = consumer_rotate_channel(socket,
+ reg->registry->reg.ust->metadata_key,
+ usess->uid, usess->gid,
+ usess->consumer, pathname, 1,
+ session->rotate_count);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_BUFFER_PER_PID:
+ {
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
+ struct consumer_socket *socket;
+ struct lttng_ht_iter chan_iter;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_session *ua_sess;
+ struct ust_registry_session *registry;
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (!ua_sess) {
+ /* Session not associated with this app. */
+ continue;
+ }
+ nr_app++;
+ ret = snprintf(pathname, PATH_MAX, DEFAULT_UST_TRACE_DIR "/%s",
+ ua_sess->path);
+ if (ret < 0) {
+ PERROR("snprintf snapshot path");
+ goto error;
+ }
+
+ /* Get the right consumer socket for the application. */
+ socket = consumer_find_socket_by_bitness(app->bits_per_long,
+ usess->consumer);
+ if (!socket) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ registry = get_session_registry(ua_sess);
+ if (!registry) {
+ DBG("Application session is being torn down. Abort snapshot record.");
+ ret = -1;
+ goto error;
+ }
+
+ /*
+ * Account the metadata channel first to make sure the
+ * number of channels waiting for a rotation cannot
+ * reach 0 before we complete the iteration over all
+ * the channels.
+ */
+ ret = rotate_add_channel_pending(registry->metadata_key,
+ LTTNG_DOMAIN_UST, session);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ pthread_mutex_unlock(socket->lock);
+ goto error;
+ }
+
+ /* Rotate the data channels. */
+ cds_lfht_for_each_entry(ua_sess->channels->ht, &chan_iter.iter,
+ ua_chan, node.node) {
+ ret = rotate_add_channel_pending(
+ ua_chan->key, LTTNG_DOMAIN_UST,
+ session);
+ if (ret < 0) {
+ ret = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ pthread_mutex_unlock(socket->lock);
+ goto error;
+ }
+ ret = consumer_rotate_channel(socket, ua_chan->key,
+ ua_sess->euid, ua_sess->egid,
+ ua_sess->consumer, pathname, 0,
+ session->rotate_count);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+
+ /* Rotate the metadata channel. */
+ (void) push_metadata(registry, usess->consumer);
+ ret = consumer_rotate_channel(socket, registry->metadata_key,
+ ua_sess->euid, ua_sess->egid,
+ ua_sess->consumer, pathname, 1,
+ session->rotate_count);
+ if (ret < 0) {
+ goto error;
+ }
+ }
+ break;
+ }
+ default:
+ assert(0);
+ break;
+ }
+
+ if (nr_app == 0 && nr_channels == 0) {
+ session->rotate_pending = 0;
+ session->rotate_status = LTTNG_ROTATE_EMPTY;
+ }
+
+ ret = LTTNG_OK;
+
+error:
+ rcu_read_unlock();
+ free(pathname);
+ return ret;
+}
projects / deliverable / lttng-tools.git / blobdiff