end:
rcu_read_unlock();
+ if (session) {
+ session_put(session);
+ }
}
/*
registry = get_session_registry(ua_chan->session);
if (registry) {
ust_registry_channel_del_free(registry, ua_chan->key,
- true);
+ sock >= 0);
+ }
+ /*
+ * A negative socket can be used by the caller when
+ * cleaning-up a ua_chan in an error path. Skip the
+ * accounting in this case.
+ */
+ if (sock >= 0) {
+ save_per_pid_lost_discarded_counters(ua_chan);
}
- save_per_pid_lost_discarded_counters(ua_chan);
}
if (ua_chan->obj != NULL) {
int ret;
struct buffer_reg_uid *reg_uid;
struct buffer_reg_channel *reg_chan;
- struct ltt_session *session;
+ struct ltt_session *session = NULL;
enum lttng_error_code notification_ret;
struct ust_registry_channel *chan_reg;
}
error:
+ if (session) {
+ session_put(session);
+ }
return ret;
}
int ret;
struct ust_registry_session *registry;
enum lttng_error_code cmd_ret;
- struct ltt_session *session;
+ struct ltt_session *session = NULL;
uint64_t chan_reg_key;
struct ust_registry_channel *chan_reg;
if (ret < 0) {
ERR("Error creating UST channel \"%s\" on the consumer daemon",
ua_chan->name);
- goto error;
+ goto error_remove_from_registry;
}
ret = send_channel_pid_to_ust(app, ua_sess, ua_chan);
if (ret != -ENOTCONN) {
ERR("Error sending channel to application");
}
- goto error;
+ goto error_remove_from_registry;
}
chan_reg_key = ua_chan->key;
if (cmd_ret != LTTNG_OK) {
ret = - (int) cmd_ret;
ERR("Failed to add channel to notification thread");
- goto error;
+ goto error_remove_from_registry;
}
+error_remove_from_registry:
+ if (ret) {
+ ust_registry_channel_del_free(registry, ua_chan->key, false);
+ }
error:
rcu_read_unlock();
+ if (session) {
+ session_put(session);
+ }
return ret;
}
struct ust_app_channel *metadata;
struct consumer_socket *socket;
struct ust_registry_session *registry;
- struct ltt_session *session;
+ struct ltt_session *session = NULL;
assert(ua_sess);
assert(app);
delete_ust_app_channel(-1, metadata, app);
error:
pthread_mutex_unlock(®istry->lock);
+ if (session) {
+ session_put(session);
+ }
return ret;
}
size_t nr_fields, struct ustctl_field *fields)
{
int ret, ret_code = 0;
- uint32_t chan_id, reg_count;
+ uint32_t chan_id;
uint64_t chan_reg_key;
enum ustctl_channel_header type;
struct ust_app *app;
assert(chan_reg);
if (!chan_reg->register_done) {
- reg_count = ust_registry_get_event_count(chan_reg);
- if (reg_count < 31) {
- type = USTCTL_CHANNEL_HEADER_COMPACT;
- } else {
- type = USTCTL_CHANNEL_HEADER_LARGE;
- }
-
+ /*
+ * TODO: eventually use the registry event count for
+ * this channel to better guess header type for per-pid
+ * buffers.
+ */
+ type = USTCTL_CHANNEL_HEADER_LARGE;
chan_reg->nr_ctx_fields = nr_fields;
chan_reg->ctx_fields = fields;
fields = NULL;
* Take a snapshot for a given UST session. The snapshot is sent to the given
* output.
*
- * Return 0 on success or else a negative value.
+ * Returns LTTNG_OK on success or a LTTNG_ERR error code.
*/
-int ust_app_snapshot_record(struct ltt_ust_session *usess,
+enum lttng_error_code ust_app_snapshot_record(struct ltt_ust_session *usess,
struct snapshot_output *output, int wait,
uint64_t nb_packets_per_stream)
{
int ret = 0;
+ enum lttng_error_code status = LTTNG_OK;
struct lttng_ht_iter iter;
struct ust_app *app;
char pathname[PATH_MAX];
- struct ltt_session *session;
+ struct ltt_session *session = NULL;
uint64_t trace_archive_id;
assert(usess);
struct buffer_reg_channel *reg_chan;
struct consumer_socket *socket;
+ if (!reg->registry->reg.ust->metadata_key) {
+ /* Skip since no metadata is present */
+ continue;
+ }
+
/* 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;
+ status = LTTNG_ERR_INVALID;
goto error;
}
reg->uid, reg->bits_per_long);
if (ret < 0) {
PERROR("snprintf snapshot path");
+ status = LTTNG_ERR_INVALID;
goto error;
}
/* Add the UST default trace dir to path. */
cds_lfht_for_each_entry(reg->registry->channels->ht, &iter.iter,
reg_chan, node.node) {
- ret = consumer_snapshot_channel(socket,
+ status = consumer_snapshot_channel(socket,
reg_chan->consumer_key,
output, 0, usess->uid,
usess->gid, pathname, wait,
nb_packets_per_stream,
trace_archive_id);
- if (ret < 0) {
+ if (status != LTTNG_OK) {
goto error;
}
}
- ret = consumer_snapshot_channel(socket,
+ status = consumer_snapshot_channel(socket,
reg->registry->reg.ust->metadata_key, output, 1,
usess->uid, usess->gid, pathname, wait, 0,
trace_archive_id);
- if (ret < 0) {
+ if (status != LTTNG_OK) {
goto error;
}
}
socket = consumer_find_socket_by_bitness(app->bits_per_long,
output->consumer);
if (!socket) {
- ret = -EINVAL;
+ status = LTTNG_ERR_INVALID;
goto error;
}
ret = snprintf(pathname, sizeof(pathname), DEFAULT_UST_TRACE_DIR "/%s",
ua_sess->path);
if (ret < 0) {
+ status = LTTNG_ERR_INVALID;
PERROR("snprintf snapshot path");
goto error;
}
cds_lfht_for_each_entry(ua_sess->channels->ht, &chan_iter.iter,
ua_chan, node.node) {
- ret = consumer_snapshot_channel(socket,
+ status = consumer_snapshot_channel(socket,
ua_chan->key, output,
0, ua_sess->euid, ua_sess->egid,
pathname, wait,
nb_packets_per_stream,
trace_archive_id);
- if (ret < 0) {
+ switch (status) {
+ case LTTNG_OK:
+ break;
+ case LTTNG_ERR_CHAN_NOT_FOUND:
+ continue;
+ default:
goto error;
}
}
registry = get_session_registry(ua_sess);
if (!registry) {
- DBG("Application session is being torn down. Abort snapshot record.");
- ret = -1;
- goto error;
+ DBG("Application session is being torn down. Skip application.");
+ continue;
}
- ret = consumer_snapshot_channel(socket,
+ status = consumer_snapshot_channel(socket,
registry->metadata_key, output,
1, ua_sess->euid, ua_sess->egid,
pathname, wait, 0,
trace_archive_id);
- if (ret < 0) {
+ switch (status) {
+ case LTTNG_OK:
+ break;
+ case LTTNG_ERR_CHAN_NOT_FOUND:
+ continue;
+ default:
goto error;
}
}
error:
rcu_read_unlock();
- return ret;
+ if (session) {
+ session_put(session);
+ }
+ return status;
}
/*
/*
* Rotate all the channels of a session.
*
- * Return 0 on success or else a negative value.
+ * Return LTTNG_OK on success or else an LTTng error code.
*/
-int ust_app_rotate_session(struct ltt_session *session, bool *ust_active)
+enum lttng_error_code ust_app_rotate_session(struct ltt_session *session)
{
- int ret = 0;
+ int ret;
+ enum lttng_error_code cmd_ret = LTTNG_OK;
struct lttng_ht_iter iter;
struct ust_app *app;
struct ltt_ust_session *usess = session->ust_session;
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 = reg->bits_per_long == 32 ?
- -LTTNG_ERR_UST_CONSUMER32_FAIL :
- -LTTNG_ERR_UST_CONSUMER64_FAIL;
+ cmd_ret = LTTNG_ERR_INVALID;
goto error;
}
reg->uid, reg->bits_per_long);
if (ret < 0 || ret == sizeof(pathname)) {
PERROR("Failed to format rotation path");
+ cmd_ret = LTTNG_ERR_INVALID;
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 = reg->bits_per_long == 32 ?
- -LTTNG_ERR_UST_CONSUMER32_FAIL :
- -LTTNG_ERR_UST_CONSUMER64_FAIL;
- goto error;
- }
ret = consumer_rotate_channel(socket,
reg_chan->consumer_key,
usess->uid, usess->gid,
usess->consumer, pathname,
/* is_metadata_channel */ false,
- session->current_archive_id,
- &session->rotate_pending_relay);
+ session->current_archive_id);
if (ret < 0) {
+ cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
}
usess->uid, usess->gid,
usess->consumer, pathname,
/* is_metadata_channel */ true,
- session->current_archive_id,
- &session->rotate_pending_relay);
+ session->current_archive_id);
if (ret < 0) {
+ cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
- *ust_active = true;
}
break;
}
ua_sess->path);
if (ret < 0 || ret == sizeof(pathname)) {
PERROR("Failed to format rotation path");
+ cmd_ret = LTTNG_ERR_INVALID;
goto error;
}
socket = consumer_find_socket_by_bitness(app->bits_per_long,
usess->consumer);
if (!socket) {
- ret = -EINVAL;
+ cmd_ret = LTTNG_ERR_INVALID;
goto error;
}
registry = get_session_registry(ua_sess);
if (!registry) {
- DBG("Application session is being torn down. Abort snapshot record.");
- ret = -1;
- goto error;
+ DBG("Application session is being torn down. Skip application.");
+ continue;
}
- /*
- * 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 = app->bits_per_long == 32 ?
- -LTTNG_ERR_UST_CONSUMER32_FAIL :
- -LTTNG_ERR_UST_CONSUMER64_FAIL;
- 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 = app->bits_per_long == 32 ?
- -LTTNG_ERR_UST_CONSUMER32_FAIL :
- -LTTNG_ERR_UST_CONSUMER64_FAIL;
- goto error;
- }
ret = consumer_rotate_channel(socket, ua_chan->key,
ua_sess->euid, ua_sess->egid,
ua_sess->consumer, pathname,
/* is_metadata_channel */ false,
- session->current_archive_id,
- &session->rotate_pending_relay);
+ session->current_archive_id);
if (ret < 0) {
+ /* Per-PID buffer and application going away. */
+ if (ret == -LTTNG_ERR_CHAN_NOT_FOUND)
+ continue;
+ cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
}
ua_sess->euid, ua_sess->egid,
ua_sess->consumer, pathname,
/* is_metadata_channel */ true,
- session->current_archive_id,
- &session->rotate_pending_relay);
+ session->current_archive_id);
if (ret < 0) {
+ /* Per-PID buffer and application going away. */
+ if (ret == -LTTNG_ERR_CHAN_NOT_FOUND)
+ continue;
+ cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
- *ust_active = true;
}
break;
}
break;
}
- ret = LTTNG_OK;
+ cmd_ret = LTTNG_OK;
error:
rcu_read_unlock();
- return ret;
+ return cmd_ret;
}
projects / lttng-tools.git / blobdiff