/*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
- * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _LGPL_SOURCE
}
/*
- * Command LTTNG_TRACK_PID processed by the client thread.
+ * Command LTTNG_TRACK_ID processed by the client thread.
*
* Called with session lock held.
*/
-int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain,
- int pid)
+int cmd_track_id(struct ltt_session *session,
+ enum lttng_tracker_type tracker_type,
+ enum lttng_domain_type domain,
+ const struct lttng_tracker_id *id)
{
int ret;
ksess = session->kernel_session;
- ret = kernel_track_pid(ksess, pid);
+ ret = kernel_track_id(tracker_type, ksess, id);
if (ret != LTTNG_OK) {
goto error;
}
usess = session->ust_session;
- ret = trace_ust_track_pid(usess, pid);
+ ret = trace_ust_track_id(tracker_type, usess, id);
if (ret != LTTNG_OK) {
goto error;
}
}
/*
- * Command LTTNG_UNTRACK_PID processed by the client thread.
+ * Command LTTNG_UNTRACK_ID processed by the client thread.
*
* Called with session lock held.
*/
-int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain,
- int pid)
+int cmd_untrack_id(struct ltt_session *session,
+ enum lttng_tracker_type tracker_type,
+ enum lttng_domain_type domain,
+ const struct lttng_tracker_id *id)
{
int ret;
ksess = session->kernel_session;
- ret = kernel_untrack_pid(ksess, pid);
+ ret = kernel_untrack_id(tracker_type, ksess, id);
if (ret != LTTNG_OK) {
goto error;
}
usess = session->ust_session;
- ret = trace_ust_untrack_pid(usess, pid);
+ ret = trace_ust_untrack_id(tracker_type, usess, id);
if (ret != LTTNG_OK) {
goto error;
}
}
/*
- * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread.
+ * Command LTTNG_LIST_TRACKER_IDS processed by the client thread.
*
* Called with session lock held.
*/
-ssize_t cmd_list_tracker_pids(struct ltt_session *session,
- enum lttng_domain_type domain, int32_t **pids)
+int cmd_list_tracker_ids(enum lttng_tracker_type tracker_type,
+ struct ltt_session *session,
+ enum lttng_domain_type domain,
+ struct lttng_tracker_ids **ids)
{
- int ret;
- ssize_t nr_pids = 0;
+ int ret = LTTNG_OK;
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
struct ltt_kernel_session *ksess;
ksess = session->kernel_session;
- nr_pids = kernel_list_tracker_pids(ksess, pids);
- if (nr_pids < 0) {
- ret = LTTNG_ERR_KERN_LIST_FAIL;
+ ret = kernel_list_tracker_ids(tracker_type, ksess, ids);
+ if (ret != LTTNG_OK) {
+ ret = -LTTNG_ERR_KERN_LIST_FAIL;
goto error;
}
break;
struct ltt_ust_session *usess;
usess = session->ust_session;
- nr_pids = trace_ust_list_tracker_pids(usess, pids);
- if (nr_pids < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
+ ret = trace_ust_list_tracker_ids(tracker_type, usess, ids);
+ if (ret != LTTNG_OK) {
+ ret = -LTTNG_ERR_UST_LIST_FAIL;
goto error;
}
break;
case LTTNG_DOMAIN_JUL:
case LTTNG_DOMAIN_PYTHON:
default:
- ret = LTTNG_ERR_UND;
+ ret = -LTTNG_ERR_UND;
goto error;
}
- return nr_pids;
-
error:
/* Return negative value to differentiate return code */
- return -ret;
+ return ret;
}
/*
struct ltt_ust_session *usess;
const bool session_rotated_after_last_stop =
session->rotated_after_last_stop;
+ const bool session_cleared_after_last_stop =
+ session->cleared_after_last_stop;
assert(session);
/* Is the session already started? */
if (session->active) {
ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
- goto error;
+ /* Perform nothing */
+ goto end;
}
if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING &&
session->active = 1;
session->rotated_after_last_stop = false;
+ session->cleared_after_last_stop = false;
if (session->output_traces && !session->current_trace_chunk) {
if (!session->has_been_started) {
struct lttng_trace_chunk *trace_chunk;
* was produced as the session was stopped, so the
* rotation should happen on reception of the command.
*/
- ret = cmd_rotate_session(session, NULL, true);
+ ret = cmd_rotate_session(session, NULL, true,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION);
if (ret != LTTNG_OK) {
goto error;
}
/* Restore initial state on error. */
session->rotated_after_last_stop =
session_rotated_after_last_stop;
+ session->cleared_after_last_stop =
+ session_cleared_after_last_stop;
}
+end:
return ret;
}
session->rotate_size = 0;
}
- if (session->most_recent_chunk_id.is_set &&
- session->most_recent_chunk_id.value != 0 &&
- session->current_trace_chunk && session->output_traces) {
+ if (session->rotated && session->current_trace_chunk && session->output_traces) {
/*
* Perform a last rotation on destruction if rotations have
* occurred during the session's lifetime.
*/
- ret = cmd_rotate_session(session, NULL, false);
+ ret = cmd_rotate_session(session, NULL, false,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED);
if (ret != LTTNG_OK) {
ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s",
session->name, lttng_strerror(-ret));
* emitted and no renaming of the current trace chunk takes
* place.
*/
- ret = cmd_rotate_session(session, NULL, true);
+ ret = cmd_rotate_session(session, NULL, true,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION);
if (ret != LTTNG_OK) {
ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s",
session->name, lttng_strerror(-ret));
}
cur_nb_packets++;
}
- if (!cur_nb_packets) {
+ if (!cur_nb_packets && size_left != max_size) {
/* Not enough room to grab one packet of each stream, error. */
return -1;
}
}
}
- if (session_close_trace_chunk(
- session, session->current_trace_chunk, NULL, NULL)) {
+ if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) {
+ ERR("Failed to release the current trace chunk of session \"%s\"",
+ session->name);
+ ret_code = LTTNG_ERR_UNK;
+ }
+
+ if (session_close_trace_chunk(session, snapshot_trace_chunk,
+ LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) {
/*
* Don't goto end; make sure the chunk is closed for the session
* to allow future snapshots.
session->name);
ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
}
- if (session_set_trace_chunk(session, NULL, NULL)) {
- ERR("Failed to release the current trace chunk of session \"%s\"",
- session->name);
- ret_code = LTTNG_ERR_UNK;
- }
error:
if (original_ust_consumer_output) {
session->ust_session->consumer = original_ust_consumer_output;
*/
int cmd_rotate_session(struct ltt_session *session,
struct lttng_rotate_session_return *rotate_return,
- bool quiet_rotation)
+ bool quiet_rotation,
+ enum lttng_trace_chunk_command_type command)
{
int ret;
uint64_t ongoing_rotation_chunk_id;
cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP;
goto end;
}
+
+ /*
+ * After a stop followed by a clear, disallow following rotations a they would
+ * generate empty chunks.
+ */
+ if (session->cleared_after_last_stop) {
+ DBG("Session \"%s\" was already cleared after stop, refusing rotation",
+ session->name);
+ cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR;
+ goto end;
+ }
+
if (session->active) {
new_trace_chunk = session_create_new_trace_chunk(session, NULL,
NULL, NULL);
assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
ret = session_close_trace_chunk(session, chunk_being_archived,
- quiet_rotation ?
- NULL :
- &((enum lttng_trace_chunk_command_type){
- LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED}),
- session->last_chunk_path);
+ command, session->last_chunk_path);
if (ret) {
cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
goto error;