#include <sys/types.h>
#include <unistd.h>
#include <urcu/compiler.h>
-#include <lttng/ust-error.h>
#include <signal.h>
#include <common/common.h>
#include "health-sessiond.h"
#include "ust-app.h"
#include "ust-consumer.h"
-#include "ust-ctl.h"
+#include "lttng-ust-ctl.h"
+#include "lttng-ust-error.h"
#include "utils.h"
#include "session.h"
#include "lttng-sessiond.h"
#include "notification-thread-commands.h"
#include "rotate.h"
+struct lttng_ht *ust_app_ht;
+struct lttng_ht *ust_app_ht_by_sock;
+struct lttng_ht *ust_app_ht_by_notify_sock;
+
static
int ust_app_flush_app_session(struct ust_app *app, struct ust_app_session *ua_sess);
case LTTNG_BUFFER_PER_UID:
{
struct buffer_reg_uid *reg_uid = buffer_reg_uid_find(
- ua_sess->tracing_id, ua_sess->bits_per_long, ua_sess->uid);
+ ua_sess->tracing_id, ua_sess->bits_per_long,
+ ua_sess->real_credentials.uid);
if (!reg_uid) {
goto error;
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_release_object(sock, ua_ctx->obj);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app sock %d release ctx obj handle %d failed with ret %d",
- sock, ua_ctx->obj->handle, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app release ctx failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app release ctx failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app release ctx obj handle %d failed with ret %d: pid = %d, sock = %d",
+ ua_ctx->obj->handle, ret,
+ app->pid, app->sock);
+ }
}
free(ua_ctx->obj);
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_release_object(sock, ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app sock %d release event obj failed with ret %d",
- sock, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app release event failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app release event failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app release event obj failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
+ }
}
free(ua_event->obj);
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_release_object(sock, stream->obj);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app sock %d release stream obj failed with ret %d",
- sock, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app release stream failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app release stream failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app release stream obj failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
+ }
}
lttng_fd_put(LTTNG_FD_APPS, 2);
free(stream->obj);
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_release_object(sock, ua_chan->obj);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app sock %d release channel obj failed with ret %d",
- sock, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app channel %s release failed. Application is dead: pid = %d, sock = %d",
+ ua_chan->name, app->pid,
+ app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app channel %s release failed. Communication time out: pid = %d, sock = %d",
+ ua_chan->name, app->pid,
+ app->sock);
+ } else {
+ ERR("UST app channel %s release failed with ret %d: pid = %d, sock = %d",
+ ua_chan->name, ret, app->pid,
+ app->sock);
+ }
}
lttng_fd_put(LTTNG_FD_APPS, 1);
free(ua_chan->obj);
* nullified. The session lock MUST be held unless the application is
* in the destroy path.
*
+ * Do not hold the registry lock while communicating with the consumerd, because
+ * doing so causes inter-process deadlocks between consumerd and sessiond with
+ * the metadata request notification.
+ *
* Return 0 on success else a negative value.
*/
static int close_metadata(struct ust_registry_session *registry,
{
int ret;
struct consumer_socket *socket;
+ uint64_t metadata_key;
+ bool registry_was_already_closed;
assert(registry);
assert(consumer);
rcu_read_lock();
pthread_mutex_lock(®istry->lock);
+ metadata_key = registry->metadata_key;
+ registry_was_already_closed = registry->metadata_closed;
+ if (metadata_key != 0) {
+ /*
+ * Metadata closed. Even on error this means that the consumer
+ * is not responding or not found so either way a second close
+ * should NOT be emit for this registry.
+ */
+ registry->metadata_closed = 1;
+ }
+ pthread_mutex_unlock(®istry->lock);
- if (!registry->metadata_key || registry->metadata_closed) {
+ if (metadata_key == 0 || registry_was_already_closed) {
ret = 0;
goto end;
}
consumer);
if (!socket) {
ret = -1;
- goto error;
+ goto end;
}
- ret = consumer_close_metadata(socket, registry->metadata_key);
+ ret = consumer_close_metadata(socket, metadata_key);
if (ret < 0) {
- goto error;
+ goto end;
}
-error:
- /*
- * Metadata closed. Even on error this means that the consumer is not
- * responding or not found so either way a second close should NOT be emit
- * for this registry.
- */
- registry->metadata_closed = 1;
end:
- pthread_mutex_unlock(®istry->lock);
rcu_read_unlock();
return ret;
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_release_handle(sock, ua_sess->handle);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app sock %d release session handle failed with ret %d",
- sock, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app release session handle failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app release session handle failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app release session handle failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
+ }
}
+
/* Remove session from application UST object descriptor. */
iter.iter.node = &ua_sess->ust_objd_node.node;
ret = lttng_ht_del(app->ust_sessions_objd, &iter);
/* Init most of the default value by allocating and zeroing */
ua_event = zmalloc(sizeof(struct ust_app_event));
if (ua_event == NULL) {
- PERROR("malloc");
+ PERROR("Failed to allocate ust_app_event structure");
goto error;
}
ua_chan->obj, &ua_ctx->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app create channel context failed for app (pid: %d) "
- "with ret %d", app->pid, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = 0;
- DBG3("UST app add context failed. Application is dead.");
+ DBG3("UST app create channel context failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ ret = 0;
+ WARN("UST app create channel context failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app create channel context failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
goto error;
}
ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app event %s filter failed for app (pid: %d) "
- "with ret %d", ua_event->attr.name, app->pid, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ ret = 0;
+ DBG3("UST app set filter failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
ret = 0;
- DBG3("UST app filter event failed. Application is dead.");
+ DBG3("UST app set filter failed. Communication timeout: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app event set filter failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid,
+ app->sock);
}
goto error;
}
ret = ustctl_set_exclusion(app->sock, ust_exclusion, ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app event %s exclusions failed for app (pid: %d) "
- "with ret %d", ua_event->attr.name, app->pid, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = 0;
- DBG3("UST app event exclusion failed. Application is dead.");
+ DBG3("UST app event exclusion failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ ret = 0;
+ WARN("UST app event exclusion failed. Communication time out(pid: %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app event exclusions failed with ret %d: pid = %d, sock = %d, event = %s",
+ ret, app->pid, app->sock, ua_event->name);
}
goto error;
}
ret = ustctl_disable(app->sock, ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app event %s disable failed for app (pid: %d) "
- "and session handle %d with ret %d",
- ua_event->attr.name, app->pid, ua_sess->handle, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ ret = 0;
+ DBG3("UST app disable event failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
ret = 0;
- DBG3("UST app disable event failed. Application is dead.");
+ WARN("UST app disable event failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app disable event failed with ret %d: pid = %d, sock = %d , name = %s",
+ ret, app->pid, app->sock, ua_event->attr.name);
}
goto error;
}
ret = ustctl_disable(app->sock, ua_chan->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app channel %s disable failed for app (pid: %d) "
- "and session handle %d with ret %d",
- ua_chan->name, app->pid, ua_sess->handle, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ ret = 0;
+ DBG3("UST app disable channel failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
ret = 0;
- DBG3("UST app disable channel failed. Application is dead.");
+ WARN("UST app disable channel failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app channel %s disable failed, session handle %d, with ret %d: pid = %d, sock = %d",
+ ua_chan->name, ua_sess->handle, ret,
+ app->pid, app->sock);
}
goto error;
}
- DBG2("UST app channel %s disabled successfully for app (pid: %d)",
+ DBG2("UST app channel %s disabled successfully for app: pid = %d",
ua_chan->name, app->pid);
error:
ret = ustctl_enable(app->sock, ua_chan->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app channel %s enable failed for app (pid: %d) "
- "and session handle %d with ret %d",
- ua_chan->name, app->pid, ua_sess->handle, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = 0;
- DBG3("UST app enable channel failed. Application is dead.");
+ DBG3("UST app channel %s enable failed. Application is dead: pid = %d, sock = %d",
+ ua_chan->name, app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ ret = 0;
+ WARN("UST app channel %s enable failed. Communication time out: pid = %d, sock = %d",
+ ua_chan->name, app->pid, app->sock);
+ } else {
+ ERR("UST app channel %s enable failed, session handle %d, with ret %d: pid = %d, sock = %d",
+ ua_chan->name, ua_sess->handle, ret,
+ app->pid, app->sock);
}
goto error;
}
ua_chan->enabled = 1;
- DBG2("UST app channel %s enabled successfully for app (pid: %d)",
+ DBG2("UST app channel %s enabled successfully for app: pid = %d",
ua_chan->name, app->pid);
error:
ret = ustctl_enable(app->sock, ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app event %s enable failed for app (pid: %d) "
- "and session handle %d with ret %d",
- ua_event->attr.name, app->pid, ua_sess->handle, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ ret = 0;
+ DBG3("UST app enable event failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
ret = 0;
- DBG3("UST app enable event failed. Application is dead.");
+ WARN("UST app enable event failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app enable event failed with ret %d: pid = %d, sock = %d, event = %s",
+ ret, app->pid, app->sock, ua_event->attr.name);
}
goto error;
}
if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = -ENOTCONN; /* Caused by app exiting. */
goto error;
+ } else if (ret == -EAGAIN) {
+ /* Caused by timeout. */
+ WARN("Communication with application %d timed out on send_channel for channel \"%s\" of session \"%" PRIu64 "\".",
+ app->pid, ua_chan->name, ua_sess->tracing_id);
+ /* Treat this the same way as an application that is exiting. */
+ ret = -ENOTCONN;
+ goto error;
} else if (ret < 0) {
goto error;
}
cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) {
ret = ust_consumer_send_stream_to_ust(app, ua_chan, stream);
if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
- ret = -ENOTCONN; /* Caused by app exiting. */
+ ret = -ENOTCONN; /* Caused by app exiting. */
goto error;
+ } else if (ret == -EAGAIN) {
+ /* Caused by timeout. */
+ WARN("Communication with application %d timed out on send_stream for stream \"%s\" of channel \"%s\" of session \"%" PRIu64 "\".",
+ app->pid, stream->name, ua_chan->name,
+ ua_sess->tracing_id);
+ /*
+ * Treat this the same way as an application that is
+ * exiting.
+ */
+ ret = -ENOTCONN;
} else if (ret < 0) {
goto error;
}
&ua_event->obj);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- abort();
- ERR("Error ustctl create event %s for app pid: %d with ret %d",
- ua_event->attr.name, app->pid, ret);
- } else {
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = 0;
- DBG3("UST app create event failed. Application is dead.");
+ DBG3("UST app create event failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ ret = 0;
+ WARN("UST app create event failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app create event '%s' failed with ret %d: pid = %d, sock = %d",
+ ua_event->attr.name, ret, app->pid,
+ app->sock);
}
goto error;
}
static void shadow_copy_session(struct ust_app_session *ua_sess,
struct ltt_ust_session *usess, struct ust_app *app)
{
- time_t rawtime;
struct tm *timeinfo;
char datetime[16];
int ret;
char tmp_shm_path[PATH_MAX];
- /* Get date and time for unique app path */
- time(&rawtime);
- timeinfo = localtime(&rawtime);
+ timeinfo = localtime(&app->registration_time);
strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
DBG2("Shadow copy of session handle %d", ua_sess->handle);
ua_sess->tracing_id = usess->id;
ua_sess->id = get_next_session_id();
- ua_sess->uid = app->uid;
- ua_sess->gid = app->gid;
- ua_sess->euid = usess->uid;
- ua_sess->egid = usess->gid;
+ ua_sess->real_credentials.uid = app->uid;
+ ua_sess->real_credentials.gid = app->gid;
+ ua_sess->effective_credentials.uid = usess->uid;
+ ua_sess->effective_credentials.gid = usess->gid;
ua_sess->buffer_type = usess->buffer_type;
ua_sess->bits_per_long = app->bits_per_long;
break;
case LTTNG_BUFFER_PER_UID:
ret = snprintf(ua_sess->path, sizeof(ua_sess->path),
- DEFAULT_UST_TRACE_UID_PATH, ua_sess->uid, app->bits_per_long);
+ DEFAULT_UST_TRACE_UID_PATH,
+ ua_sess->real_credentials.uid,
+ app->bits_per_long);
break;
default:
assert(0);
app->bits_per_long, app->uint8_t_alignment,
app->uint16_t_alignment, app->uint32_t_alignment,
app->uint64_t_alignment, app->long_alignment,
- app->byte_order, app->version.major,
- app->version.minor, reg_pid->root_shm_path,
- reg_pid->shm_path,
- ua_sess->euid, ua_sess->egid);
+ app->byte_order, app->version.major, app->version.minor,
+ reg_pid->root_shm_path, reg_pid->shm_path,
+ ua_sess->effective_credentials.uid,
+ ua_sess->effective_credentials.gid, ua_sess->tracing_id,
+ app->uid);
if (ret < 0) {
/*
* reg_pid->registry->reg.ust is NULL upon error, so we need to
app->uint64_t_alignment, app->long_alignment,
app->byte_order, app->version.major,
app->version.minor, reg_uid->root_shm_path,
- reg_uid->shm_path, usess->uid, usess->gid);
+ reg_uid->shm_path, usess->uid, usess->gid,
+ ua_sess->tracing_id, app->uid);
if (ret < 0) {
/*
* reg_uid->registry->reg.ust is NULL upon error, so we need to
ret = ustctl_create_session(app->sock);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("Creating session for app pid %d with ret %d",
- app->pid, ret);
- } else {
- DBG("UST app creating session failed. Application is dead");
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally. This will get flagged ENOTCONN and the
- * caller will handle it.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG("UST app creating session failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ ret = 0;
+ } else if (ret == -EAGAIN) {
+ DBG("UST app creating session failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
ret = 0;
+ } else {
+ ERR("UST app creating session failed with ret %d: pid = %d, sock =%d",
+ ret, app->pid, app->sock);
}
delete_ust_app_session(-1, ua_sess, app);
if (ret != -ENOMEM) {
* stream we have to expect.
*/
ret = ust_consumer_ask_channel(ua_sess, ua_chan, usess->consumer, socket,
- registry, trace_archive_id);
+ registry, usess->current_trace_chunk);
if (ret < 0) {
goto error_ask;
}
health_code_update();
/*
- * Now get the channel from the consumer. This call wil populate the stream
+ * Now get the channel from the consumer. This call will populate the stream
* list of that channel and set the ust objects.
*/
if (usess->consumer->enabled) {
if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = -ENOTCONN; /* Caused by app exiting. */
goto error;
+ } else if (ret == -EAGAIN) {
+ /* Caused by timeout. */
+ WARN("Communication with application %d timed out on send_channel for channel \"%s\" of session \"%" PRIu64 "\".",
+ app->pid, ua_chan->name, ua_sess->tracing_id);
+ /* Treat this the same way as an application that is exiting. */
+ ret = -ENOTCONN;
+ goto error;
} else if (ret < 0) {
goto error;
}
ret = ust_consumer_send_stream_to_ust(app, ua_chan, &stream);
if (ret < 0) {
- (void) release_ust_app_stream(-1, &stream, app);
if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
ret = -ENOTCONN; /* Caused by app exiting. */
+ } else if (ret == -EAGAIN) {
+ /*
+ * Caused by timeout.
+ * Treat this the same way as an application
+ * that is exiting.
+ */
+ WARN("Communication with application %d timed out on send_stream for stream \"%s\" of channel \"%s\" of session \"%" PRIu64 "\".",
+ app->pid, stream.name,
+ ua_chan->name,
+ ua_sess->tracing_id);
+ ret = -ENOTCONN;
}
+ (void) release_ust_app_stream(-1, &stream, app);
goto error_stream_unlock;
}
*/
ret = do_consumer_create_channel(usess, ua_sess, ua_chan,
app->bits_per_long, reg_uid->registry->reg.ust,
- session->current_archive_id);
+ session->most_recent_chunk_id.value);
if (ret < 0) {
ERR("Error creating UST channel \"%s\" on the consumer daemon",
ua_chan->name);
notification_ret = notification_thread_command_add_channel(
notification_thread_handle, session->name,
- ua_sess->euid, ua_sess->egid,
- ua_chan->name,
- ua_chan->key,
- LTTNG_DOMAIN_UST,
+ ua_sess->effective_credentials.uid,
+ ua_sess->effective_credentials.gid, ua_chan->name,
+ ua_chan->key, LTTNG_DOMAIN_UST,
ua_chan->attr.subbuf_size * ua_chan->attr.num_subbuf);
if (notification_ret != LTTNG_OK) {
ret = - (int) notification_ret;
/* Create and get channel on the consumer side. */
ret = do_consumer_create_channel(usess, ua_sess, ua_chan,
app->bits_per_long, registry,
- session->current_archive_id);
+ session->most_recent_chunk_id.value);
if (ret < 0) {
ERR("Error creating UST channel \"%s\" on the consumer daemon",
ua_chan->name);
cmd_ret = notification_thread_command_add_channel(
notification_thread_handle, session->name,
- ua_sess->euid, ua_sess->egid,
- ua_chan->name,
- ua_chan->key,
- LTTNG_DOMAIN_UST,
+ ua_sess->effective_credentials.uid,
+ ua_sess->effective_credentials.gid, ua_chan->name,
+ ua_chan->key, LTTNG_DOMAIN_UST,
ua_chan->attr.subbuf_size * ua_chan->attr.num_subbuf);
if (cmd_ret != LTTNG_OK) {
ret = - (int) cmd_ret;
ua_event = alloc_ust_app_event(uevent->attr.name, &uevent->attr);
if (ua_event == NULL) {
- /* Only malloc can failed so something is really wrong */
+ /* Only failure mode of alloc_ust_app_event(). */
ret = -ENOMEM;
goto end;
}
/* Create it on the tracer side */
ret = create_ust_event(app, ua_sess, ua_chan, ua_event);
if (ret < 0) {
- /* Not found previously means that it does not exist on the tracer */
- assert(ret != -LTTNG_UST_ERR_EXIST);
+ /*
+ * Not found previously means that it does not exist on the
+ * tracer. If the application reports that the event existed,
+ * it means there is a bug in the sessiond or lttng-ust
+ * (or corruption, etc.)
+ */
+ if (ret == -LTTNG_UST_ERR_EXIST) {
+ ERR("Tracer for application reported that an event being created already existed: "
+ "event_name = \"%s\", pid = %d, ppid = %d, uid = %d, gid = %d",
+ uevent->attr.name,
+ app->pid, app->ppid, app->uid,
+ app->gid);
+ }
goto error;
}
* consumer.
*/
ret = ust_consumer_ask_channel(ua_sess, metadata, consumer, socket,
- registry, session->current_archive_id);
+ registry, session->current_trace_chunk);
if (ret < 0) {
/* Nullify the metadata key so we don't try to close it later on. */
registry->metadata_key = 0;
assert(app);
assert(app->notify_sock >= 0);
+ app->registration_time = time(NULL);
+
rcu_read_lock();
/*
lttng_ht_node_init_ulong(&app->notify_sock_n, app->notify_sock);
lttng_ht_add_unique_ulong(ust_app_ht_by_notify_sock, &app->notify_sock_n);
- DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s "
- "notify_sock:%d (version %d.%d)", app->pid, app->ppid, app->uid,
+ DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock =%d name:%s "
+ "notify_sock =%d (version %d.%d)", app->pid, app->ppid, app->uid,
app->gid, app->sock, app->name, app->notify_sock, app->v_major,
app->v_minor);
ret = ustctl_tracer_version(app->sock, &app->version);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -LTTNG_UST_ERR_EXITING && ret != -EPIPE) {
- ERR("UST app %d version failed with ret %d", app->sock, ret);
+ if (ret == -LTTNG_UST_ERR_EXITING || ret == -EPIPE) {
+ DBG3("UST app version failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app version failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
} else {
- DBG3("UST app %d version failed. Application is dead", app->sock);
+ ERR("UST app version failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
}
app->sock, ret);
} else {
DBG3("UST app tp list get failed. Application is dead");
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally. Continue normal execution.
- */
break;
}
free(tmp_event);
}
ret = ustctl_release_handle(app->sock, handle);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -LTTNG_UST_ERR_EXITING && ret != -EPIPE) {
- ERR("Error releasing app handle for app %d with ret %d", app->sock, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("Error releasing app handle. Application died: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("Error releasing app handle. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("Error releasing app handle with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
+ }
}
}
app->sock, ret);
} else {
DBG3("UST app tp list field failed. Application is dead");
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally. Reset list and count for next app.
- */
break;
}
free(tmp_event);
ret = ust_app_channel_allocate(ua_sess, uchan,
LTTNG_UST_CHAN_PER_CPU, usess,
&ua_chan);
- if (ret == 0) {
- ret = ust_app_channel_send(app, usess,
- ua_sess, ua_chan);
- } else {
- goto end;
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = ust_app_channel_send(app, usess,
+ ua_sess, ua_chan);
+ if (ret) {
+ goto error;
}
/* Add contexts. */
ret = create_ust_app_channel_context(ua_chan,
&uctx->ctx, app);
if (ret) {
- goto end;
+ goto error;
}
}
}
+
+error:
if (ret < 0) {
switch (ret) {
case -ENOTCONN:
break;
}
}
-end:
+
if (ret == 0 && _ua_chan) {
/*
* Only return the application's channel on success. Note
if (session_was_created) {
destroy_app_session(app, ua_sess);
}
- goto error_rcu_unlock;
+ /* Continue to the next application. */
}
}
goto skip_setup;
}
- /*
- * Create the metadata for the application. This returns gracefully if a
- * metadata was already set for the session.
- */
- ret = create_ust_app_metadata(ua_sess, app, usess->consumer);
- if (ret < 0) {
- goto error_unlock;
- }
-
health_code_update();
skip_setup:
ret = ustctl_start_session(app->sock, ua_sess->handle);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("Error starting tracing for app pid: %d (ret: %d)",
- app->pid, ret);
- } else {
- DBG("UST app start session failed. Application is dead.");
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app start session failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
pthread_mutex_unlock(&ua_sess->lock);
goto end;
+ } else if (ret == -EAGAIN) {
+ WARN("UST app start session failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ pthread_mutex_unlock(&ua_sess->lock);
+ goto end;
+
+ } else {
+ ERR("UST app start session failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
goto error_unlock;
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_wait_quiescent(app->sock);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app wait quiescent failed for app pid %d ret %d",
- app->pid, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app wait quiescent failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app wait quiescent failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app wait quiescent failed with ret %d: pid %d, sock = %d",
+ ret, app->pid, app->sock);
+ }
}
end:
ret = ustctl_stop_session(app->sock, ua_sess->handle);
pthread_mutex_unlock(&app->sock_lock);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("Error stopping tracing for app pid: %d (ret: %d)",
- app->pid, ret);
- } else {
- DBG("UST app stop session failed. Application is dead.");
- /*
- * This is normal behavior, an application can die during the
- * creation process. Don't report an error so the execution can
- * continue normally.
- */
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app stop session failed. Application is dead: pid = %d, sock = %d",
+ app->pid, app->sock);
+ goto end_unlock;
+ } else if (ret == -EAGAIN) {
+ WARN("UST app stop session failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
goto end_unlock;
+
+ } else {
+ ERR("UST app stop session failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
goto error_rcu_unlock;
}
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_wait_quiescent(app->sock);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app wait quiescent failed for app pid %d ret %d",
- app->pid, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app wait quiescent failed. Application is dead: pid= %d, sock = %d)",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app wait quiescent failed. Communication time out: pid= %d, sock = %d)",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app wait quiescent failed with ret %d: pid= %d, sock = %d)",
+ ret, app->pid, app->sock);
+ }
}
health_code_update();
pthread_mutex_lock(&app->sock_lock);
ret = ustctl_wait_quiescent(app->sock);
pthread_mutex_unlock(&app->sock_lock);
- if (ret < 0 && ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app wait quiescent failed for app pid %d ret %d",
- app->pid, ret);
+ if (ret < 0) {
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app wait quiescent failed. Application is dead: pid= %d, sock = %d)",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app wait quiescent failed. Communication time out: pid= %d, sock = %d)",
+ app->pid, app->sock);
+ } else {
+ ERR("UST app wait quiescent failed with ret %d: pid= %d, sock = %d)",
+ ret, app->pid, app->sock);
+ }
}
end:
rcu_read_unlock();
}
rcu_read_lock();
+
cds_lfht_for_each_entry(usess->domain_global.channels->ht, &uchan_iter,
uchan, node.node) {
struct ust_app_channel *ua_chan;
}
}
}
+
+ /*
+ * Create the metadata for the application. This returns gracefully if a
+ * metadata was already set for the session.
+ *
+ * The metadata channel must be created after the data channels as the
+ * consumer daemon assumes this ordering. When interacting with a relay
+ * daemon, the consumer will use this assumption to send the
+ * "STREAMS_SENT" message to the relay daemon.
+ */
+ ret = create_ust_app_metadata(ua_sess, app, usess->consumer);
+ if (ret < 0) {
+ goto error_unlock;
+ }
+
rcu_read_unlock();
end:
if (!app) {
DBG("Application socket %d is being torn down. Abort event notify",
sock);
- ret = 0;
+ ret = -1;
goto error_rcu_unlock;
}
reply:
DBG3("UST app replying to register channel key %" PRIu64
- " with id %u, type: %d, ret: %d", chan_reg_key, chan_id, type,
+ " with id %u, type = %d, ret = %d", chan_reg_key, chan_id, type,
ret_code);
ret = ustctl_reply_register_channel(sock, chan_id, type, ret_code);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app reply channel failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app reply channel failed. Application died: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app reply channel failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
} else {
- DBG3("UST app reply channel failed. Application died");
+ ERR("UST app reply channel failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
goto error;
}
if (!app) {
DBG("Application socket %d is being torn down. Abort event notify",
sock);
- ret = 0;
+ ret = -1;
goto error_rcu_unlock;
}
*/
ret = ustctl_reply_register_event(sock, event_id, ret_code);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app reply event failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app reply event failed. Application died: pid = %d, sock = %d.",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app reply event failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
} else {
- DBG3("UST app reply event failed. Application died");
+ ERR("UST app reply event failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
/*
* No need to wipe the create event since the application socket will
DBG("Application socket %d is being torn down. Aborting enum registration",
sock);
free(entries);
+ ret = -1;
goto error_rcu_unlock;
}
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 (session not found). 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);
if (!registry) {
- DBG("Application session is being torn down (registry not found). Aborting enum registration.");
+ DBG("Application session is being torn down (registry not found Aborting enum registration.");
free(entries);
goto error_rcu_unlock;
}
*/
ret = ustctl_reply_register_enum(sock, enum_id, ret_code);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app reply enum failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app reply enum failed. Application died: pid = %d, sock = %d",
+ app->pid, app->sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app reply enum failed. Communication time out: pid = %d, sock = %d",
+ app->pid, app->sock);
} else {
- DBG3("UST app reply enum failed. Application died");
+ ERR("UST app reply enum failed with ret %d: pid = %d, sock = %d",
+ ret, app->pid, app->sock);
}
/*
* No need to wipe the create enum since the application socket will
ret = ustctl_recv_notify(sock, &cmd);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app recv notify failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app recv notify failed. Application died: sock = %d",
+ sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app recv notify failed. Communication time out: sock = %d",
+ sock);
} else {
- DBG3("UST app recv notify failed. Application died");
+ ERR("UST app recv notify failed with ret %d: sock = %d",
+ ret, sock);
}
goto error;
}
&loglevel_value, &sig, &nr_fields, &fields,
&model_emf_uri);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app recv event failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app recv event failed. Application died: sock = %d",
+ sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app recv event failed. Communication time out: sock = %d",
+ sock);
} else {
- DBG3("UST app recv event failed. Application died");
+ ERR("UST app recv event failed with ret %d: sock = %d",
+ ret, sock);
}
goto error;
}
ret = ustctl_recv_register_channel(sock, &sobjd, &cobjd, &nr_fields,
&fields);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app recv channel failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app recv channel failed. Application died: sock = %d",
+ sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app recv channel failed. Communication time out: sock = %d",
+ sock);
} else {
- DBG3("UST app recv channel failed. Application died");
+ ERR("UST app recv channel failed with ret %d: sock = %d)",
+ ret, sock);
}
goto error;
}
ret = ustctl_recv_register_enum(sock, &sobjd, name,
&entries, &nr_entries);
if (ret < 0) {
- if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
- ERR("UST app recv enum failed with ret %d", ret);
+ if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+ DBG3("UST app recv enum failed. Application died: sock = %d",
+ sock);
+ } else if (ret == -EAGAIN) {
+ WARN("UST app recv enum failed. Communication time out: sock = %d",
+ sock);
} else {
- DBG3("UST app recv enum failed. Application died");
+ ERR("UST app recv enum failed with ret %d: sock = %d",
+ ret, sock);
}
goto error;
}
*/
enum lttng_error_code ust_app_snapshot_record(
const struct ltt_ust_session *usess,
- const struct snapshot_output *output, int wait,
+ const struct consumer_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 = NULL;
- uint64_t trace_archive_id;
+ char *trace_path = NULL;
assert(usess);
assert(output);
rcu_read_lock();
- session = session_find_by_id(usess->id);
- assert(session);
- assert(pthread_mutex_trylock(&session->lock));
- assert(session_trylock_list());
- trace_archive_id = session->current_archive_id;
-
switch (usess->buffer_type) {
case LTTNG_BUFFER_PER_UID:
{
cds_list_for_each_entry(reg, &usess->buffer_reg_uid_list, lnode) {
struct buffer_reg_channel *reg_chan;
struct consumer_socket *socket;
+ char pathname[PATH_MAX];
if (!reg->registry->reg.ust->metadata_key) {
/* Skip since no metadata is present */
}
memset(pathname, 0, sizeof(pathname));
+ /*
+ * DEFAULT_UST_TRACE_UID_PATH already contains a path
+ * separator.
+ */
ret = snprintf(pathname, sizeof(pathname),
- DEFAULT_UST_TRACE_DIR "/" DEFAULT_UST_TRACE_UID_PATH,
+ DEFAULT_UST_TRACE_DIR DEFAULT_UST_TRACE_UID_PATH,
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. */
+ /* Free path allowed on previous iteration. */
+ free(trace_path);
+ trace_path = setup_channel_trace_path(usess->consumer, pathname);
+ if (!trace_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) {
status = consumer_snapshot_channel(socket,
reg_chan->consumer_key,
output, 0, usess->uid,
- usess->gid, pathname, wait,
- nb_packets_per_stream,
- trace_archive_id);
+ usess->gid, trace_path, wait,
+ nb_packets_per_stream);
if (status != LTTNG_OK) {
goto error;
}
}
status = consumer_snapshot_channel(socket,
reg->registry->reg.ust->metadata_key, output, 1,
- usess->uid, usess->gid, pathname, wait, 0,
- trace_archive_id);
+ usess->uid, usess->gid, trace_path, wait, 0);
if (status != LTTNG_OK) {
goto error;
}
struct ust_app_channel *ua_chan;
struct ust_app_session *ua_sess;
struct ust_registry_session *registry;
+ char pathname[PATH_MAX];
ua_sess = lookup_session_by_app(usess, app);
if (!ua_sess) {
/* Get the right consumer socket for the application. */
socket = consumer_find_socket_by_bitness(app->bits_per_long,
- output->consumer);
+ output);
if (!socket) {
status = LTTNG_ERR_INVALID;
goto error;
/* Add the UST default trace dir to path. */
memset(pathname, 0, sizeof(pathname));
- ret = snprintf(pathname, sizeof(pathname), DEFAULT_UST_TRACE_DIR "/%s",
+ 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,
+ /* Free path allowed on previous iteration. */
+ free(trace_path);
+ trace_path = setup_channel_trace_path(usess->consumer, pathname);
+ if (!trace_path) {
+ status = LTTNG_ERR_INVALID;
+ goto error;
+ }
+ cds_lfht_for_each_entry(ua_sess->channels->ht, &chan_iter.iter,
ua_chan, node.node) {
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);
+ ua_chan->key, output, 0,
+ ua_sess->effective_credentials
+ .uid,
+ ua_sess->effective_credentials
+ .gid,
+ trace_path, wait,
+ nb_packets_per_stream);
switch (status) {
case LTTNG_OK:
break;
continue;
}
status = consumer_snapshot_channel(socket,
- registry->metadata_key, output,
- 1, ua_sess->euid, ua_sess->egid,
- pathname, wait, 0,
- trace_archive_id);
+ registry->metadata_key, output, 1,
+ ua_sess->effective_credentials.uid,
+ ua_sess->effective_credentials.gid,
+ trace_path, wait, 0);
switch (status) {
case LTTNG_OK:
break;
}
error:
+ free(trace_path);
rcu_read_unlock();
- if (session) {
- session_put(session);
- }
return status;
}
struct lttng_ht_iter iter;
struct ust_app *app;
struct ltt_ust_session *usess = session->ust_session;
- char pathname[LTTNG_PATH_MAX];
assert(usess);
goto error;
}
- ret = snprintf(pathname, sizeof(pathname),
- DEFAULT_UST_TRACE_DIR "/" DEFAULT_UST_TRACE_UID_PATH,
- 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 = consumer_rotate_channel(socket,
reg_chan->consumer_key,
usess->uid, usess->gid,
- usess->consumer, pathname,
- /* is_metadata_channel */ false,
- session->current_archive_id);
+ usess->consumer,
+ /* is_metadata_channel */ false);
if (ret < 0) {
cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
}
+ /*
+ * The metadata channel might not be present.
+ *
+ * Consumer stream allocation can be done
+ * asynchronously and can fail on intermediary
+ * operations (i.e add context) and lead to data
+ * channels created with no metadata channel.
+ */
+ if (!reg->registry->reg.ust->metadata_key) {
+ /* Skip since no metadata is present. */
+ continue;
+ }
+
(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,
- /* is_metadata_channel */ true,
- session->current_archive_id);
+ usess->consumer,
+ /* is_metadata_channel */ true);
if (ret < 0) {
cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
/* Session not associated with this app. */
continue;
}
- ret = snprintf(pathname, sizeof(pathname),
- DEFAULT_UST_TRACE_DIR "/%s",
- ua_sess->path);
- if (ret < 0 || ret >= sizeof(pathname)) {
- PERROR("Failed to format rotation path");
- cmd_ret = LTTNG_ERR_INVALID;
- goto error;
- }
/* Get the right consumer socket for the application. */
socket = consumer_find_socket_by_bitness(app->bits_per_long,
continue;
}
-
/* Rotate the data channels. */
cds_lfht_for_each_entry(ua_sess->channels->ht, &chan_iter.iter,
ua_chan, node.node) {
- 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);
+ ret = consumer_rotate_channel(socket,
+ ua_chan->key,
+ ua_sess->effective_credentials
+ .uid,
+ ua_sess->effective_credentials
+ .gid,
+ ua_sess->consumer,
+ /* is_metadata_channel */ false);
if (ret < 0) {
/* Per-PID buffer and application going away. */
if (ret == -LTTNG_ERR_CHAN_NOT_FOUND)
/* 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,
- /* is_metadata_channel */ true,
- session->current_archive_id);
+ ret = consumer_rotate_channel(socket,
+ registry->metadata_key,
+ ua_sess->effective_credentials.uid,
+ ua_sess->effective_credentials.gid,
+ ua_sess->consumer,
+ /* is_metadata_channel */ true);
if (ret < 0) {
/* Per-PID buffer and application going away. */
if (ret == -LTTNG_ERR_CHAN_NOT_FOUND)
rcu_read_unlock();
return cmd_ret;
}
+
+enum lttng_error_code ust_app_create_channel_subdirectories(
+ const struct ltt_ust_session *usess)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+ struct lttng_ht_iter iter;
+ enum lttng_trace_chunk_status chunk_status;
+ char *pathname_index;
+ int fmt_ret;
+
+ assert(usess->current_trace_chunk);
+ rcu_read_lock();
+
+ 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) {
+ fmt_ret = asprintf(&pathname_index,
+ DEFAULT_UST_TRACE_DIR DEFAULT_UST_TRACE_UID_PATH "/" DEFAULT_INDEX_DIR,
+ reg->uid, reg->bits_per_long);
+ if (fmt_ret < 0) {
+ ERR("Failed to format channel index directory");
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+
+ /*
+ * Create the index subdirectory which will take care
+ * of implicitly creating the channel's path.
+ */
+ chunk_status = lttng_trace_chunk_create_subdirectory(
+ usess->current_trace_chunk,
+ pathname_index);
+ free(pathname_index);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+ }
+ break;
+ }
+ case LTTNG_BUFFER_PER_PID:
+ {
+ struct ust_app *app;
+
+ /*
+ * Create the toplevel ust/ directory in case no apps are running.
+ */
+ chunk_status = lttng_trace_chunk_create_subdirectory(
+ usess->current_trace_chunk,
+ DEFAULT_UST_TRACE_DIR);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app,
+ pid_n.node) {
+ 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;
+ }
+
+ registry = get_session_registry(ua_sess);
+ if (!registry) {
+ DBG("Application session is being torn down. Skip application.");
+ continue;
+ }
+
+ fmt_ret = asprintf(&pathname_index,
+ DEFAULT_UST_TRACE_DIR "%s/" DEFAULT_INDEX_DIR,
+ ua_sess->path);
+ if (fmt_ret < 0) {
+ ERR("Failed to format channel index directory");
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+ /*
+ * Create the index subdirectory which will take care
+ * of implicitly creating the channel's path.
+ */
+ chunk_status = lttng_trace_chunk_create_subdirectory(
+ usess->current_trace_chunk,
+ pathname_index);
+ free(pathname_index);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = LTTNG_ERR_CREATE_DIR_FAIL;
+ goto error;
+ }
+ }
+ break;
+ }
+ default:
+ abort();
+ }
+
+ ret = LTTNG_OK;
+error:
+ rcu_read_unlock();
+ return ret;
+}
projects / lttng-tools.git / blobdiff