uint64_t key; /* del */
};
+/* Flag used to temporarily pause data consumption from testpoints. */
int data_consumption_paused;
/*
* Also updated by the signal handler (consumer_should_exit()). Read by the
* polling threads.
*/
-volatile int consumer_quit;
+int consumer_quit;
/*
* Global hash table containing respectively metadata and data streams. The
(void) relayd_close(&relayd->control_sock);
(void) relayd_close(&relayd->data_sock);
+ pthread_mutex_destroy(&relayd->ctrl_sock_mutex);
free(relayd);
}
* If a local data context is available, notify the threads that the streams'
* state have changed.
*/
-static void cleanup_relayd(struct consumer_relayd_sock_pair *relayd,
- struct lttng_consumer_local_data *ctx)
+void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair *relayd)
{
uint64_t netidx;
assert(relayd);
- DBG("Cleaning up relayd sockets");
+ DBG("Cleaning up relayd object ID %"PRIu64, relayd->net_seq_idx);
/* Save the net sequence index before destroying the object */
netidx = relayd->net_seq_idx;
* memory barrier ordering the updates of the end point status from the
* read of this status which happens AFTER receiving this notify.
*/
- if (ctx) {
- notify_thread_lttng_pipe(ctx->consumer_data_pipe);
- notify_thread_lttng_pipe(ctx->consumer_metadata_pipe);
- }
+ notify_thread_lttng_pipe(relayd->ctx->consumer_data_pipe);
+ notify_thread_lttng_pipe(relayd->ctx->consumer_metadata_pipe);
}
/*
consumer_stream_destroy(stream, metadata_ht);
}
+void consumer_stream_update_channel_attributes(
+ struct lttng_consumer_stream *stream,
+ struct lttng_consumer_channel *channel)
+{
+ stream->channel_read_only_attributes.tracefile_size =
+ channel->tracefile_size;
+ memcpy(stream->channel_read_only_attributes.path, channel->pathname,
+ sizeof(stream->channel_read_only_attributes.path));
+}
+
struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key,
uint64_t stream_key,
enum lttng_consumer_stream_state state,
int cpu,
int *alloc_ret,
enum consumer_channel_type type,
- unsigned int monitor)
+ unsigned int monitor,
+ uint64_t trace_archive_id)
{
int ret;
struct lttng_consumer_stream *stream;
stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE;
stream->index_file = NULL;
stream->last_sequence_number = -1ULL;
+ stream->trace_archive_id = trace_archive_id;
pthread_mutex_init(&stream->lock, NULL);
pthread_mutex_init(&stream->metadata_timer_lock, NULL);
/*
* Add a stream to the global list protected by a mutex.
*/
-int consumer_add_data_stream(struct lttng_consumer_stream *stream)
+void consumer_add_data_stream(struct lttng_consumer_stream *stream)
{
struct lttng_ht *ht = data_ht;
- int ret = 0;
assert(stream);
assert(ht);
pthread_mutex_unlock(&stream->chan->timer_lock);
pthread_mutex_unlock(&stream->chan->lock);
pthread_mutex_unlock(&consumer_data.lock);
-
- return ret;
}
void consumer_del_data_stream(struct lttng_consumer_stream *stream)
pthread_mutex_lock(&relayd->ctrl_sock_mutex);
ret = relayd_add_stream(&relayd->control_sock, stream->name,
path, &stream->relayd_stream_id,
- stream->chan->tracefile_size, stream->chan->tracefile_count);
+ stream->chan->tracefile_size, stream->chan->tracefile_count,
+ stream->trace_archive_id);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
+ ERR("Relayd add stream failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
goto end;
}
ret = relayd_streams_sent(&relayd->control_sock);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
+ ERR("Relayd streams sent failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
goto end;
}
} else {
*/
static int update_poll_array(struct lttng_consumer_local_data *ctx,
struct pollfd **pollfd, struct lttng_consumer_stream **local_stream,
- struct lttng_ht *ht)
+ struct lttng_ht *ht, int *nb_inactive_fd)
{
int i = 0;
struct lttng_ht_iter iter;
assert(local_stream);
DBG("Updating poll fd array");
+ *nb_inactive_fd = 0;
rcu_read_lock();
cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) {
/*
* just after the check. However, this is OK since the stream(s) will
* be deleted once the thread is notified that the end point state has
* changed where this function will be called back again.
+ *
+ * We track the number of inactive FDs because they still need to be
+ * closed by the polling thread after a wakeup on the data_pipe or
+ * metadata_pipe.
*/
if (stream->state != LTTNG_CONSUMER_ACTIVE_STREAM ||
stream->endpoint_status == CONSUMER_ENDPOINT_INACTIVE) {
+ (*nb_inactive_fd)++;
continue;
}
/*
{
ssize_t ret;
- consumer_quit = 1;
+ CMM_STORE_SHARED(consumer_quit, 1);
ret = lttng_write(ctx->consumer_should_quit[1], "4", 1);
if (ret < 1) {
PERROR("write consumer quit");
*/
static int write_relayd_metadata_id(int fd,
struct lttng_consumer_stream *stream,
- struct consumer_relayd_sock_pair *relayd, unsigned long padding)
+ unsigned long padding)
{
ssize_t ret;
struct lttcomm_relayd_metadata_payload hdr;
/* Write metadata stream id before payload */
if (stream->metadata_flag) {
- ret = write_relayd_metadata_id(outfd, stream, relayd, padding);
+ ret = write_relayd_metadata_id(outfd, stream, padding);
if (ret < 0) {
relayd_hang_up = 1;
goto write_error;
* cleanup the relayd object and all associated streams.
*/
if (relayd && relayd_hang_up) {
- cleanup_relayd(relayd, ctx);
+ ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
}
end:
}
stream->reset_metadata_flag = 0;
}
- ret = write_relayd_metadata_id(splice_pipe[1], stream, relayd,
+ ret = write_relayd_metadata_id(splice_pipe[1], stream,
padding);
if (ret < 0) {
written = ret;
* cleanup the relayd object and all associated streams.
*/
if (relayd && relayd_hang_up) {
- cleanup_relayd(relayd, ctx);
+ ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
/* Skip splice error so the consumer does not fail */
goto end;
}
return written;
}
+/*
+ * Sample the snapshot positions for a specific fd
+ *
+ * Returns 0 on success, < 0 on error
+ */
+int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream *stream)
+{
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER_KERNEL:
+ return lttng_kconsumer_sample_snapshot_positions(stream);
+ case LTTNG_CONSUMER32_UST:
+ case LTTNG_CONSUMER64_UST:
+ return lttng_ustconsumer_sample_snapshot_positions(stream);
+ default:
+ ERR("Unknown consumer_data type");
+ assert(0);
+ return -ENOSYS;
+ }
+}
/*
* Take a snapshot for a specific fd
*
}
}
+/*
+ * Get the consumed position (free-running counter position in bytes).
+ *
+ * Returns 0 on success, < 0 on error
+ */
+int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream *stream,
+ unsigned long *pos)
+{
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER_KERNEL:
+ return lttng_kconsumer_get_consumed_snapshot(stream, pos);
+ case LTTNG_CONSUMER32_UST:
+ case LTTNG_CONSUMER64_UST:
+ return lttng_ustconsumer_get_consumed_snapshot(stream, pos);
+ default:
+ ERR("Unknown consumer_data type");
+ assert(0);
+ return -ENOSYS;
+ }
+}
+
int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx,
int sock, struct pollfd *consumer_sockpoll)
{
* Action done with the metadata stream when adding it to the consumer internal
* data structures to handle it.
*/
-int consumer_add_metadata_stream(struct lttng_consumer_stream *stream)
+void consumer_add_metadata_stream(struct lttng_consumer_stream *stream)
{
struct lttng_ht *ht = metadata_ht;
- int ret = 0;
struct lttng_ht_iter iter;
struct lttng_ht_node_u64 *node;
lttng_ht_add_unique_u64(ht, &stream->node);
- lttng_ht_add_unique_u64(consumer_data.stream_per_chan_id_ht,
+ lttng_ht_add_u64(consumer_data.stream_per_chan_id_ht,
&stream->node_channel_id);
/*
pthread_mutex_unlock(&stream->chan->lock);
pthread_mutex_unlock(&stream->chan->timer_lock);
pthread_mutex_unlock(&consumer_data.lock);
- return ret;
}
/*
rcu_read_unlock();
}
+static
+int rotate_notify_sessiond(struct lttng_consumer_local_data *ctx,
+ uint64_t key)
+{
+ ssize_t ret;
+
+ do {
+ ret = write(ctx->channel_rotate_pipe, &key, sizeof(key));
+ } while (ret == -1 && errno == EINTR);
+ if (ret == -1) {
+ PERROR("Failed to write to the channel rotation pipe");
+ } else {
+ DBG("Sent channel rotation notification for channel key %"
+ PRIu64, key);
+ ret = 0;
+ }
+
+ return (int) ret;
+}
+
+/*
+ * Perform operations that need to be done after a stream has
+ * rotated and released the stream lock.
+ *
+ * Multiple rotations cannot occur simultaneously, so we know the state of the
+ * "rotated" stream flag cannot change.
+ *
+ * This MUST be called WITHOUT the stream lock held.
+ */
+static
+int consumer_post_rotation(struct lttng_consumer_stream *stream,
+ struct lttng_consumer_local_data *ctx)
+{
+ int ret = 0;
+
+ pthread_mutex_lock(&stream->chan->lock);
+
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER_KERNEL:
+ break;
+ case LTTNG_CONSUMER32_UST:
+ case LTTNG_CONSUMER64_UST:
+ /*
+ * The ust_metadata_pushed counter has been reset to 0, so now
+ * we can wakeup the metadata thread so it dumps the metadata
+ * cache to the new file.
+ */
+ if (stream->metadata_flag) {
+ consumer_metadata_wakeup_pipe(stream->chan);
+ }
+ break;
+ default:
+ ERR("Unknown consumer_data type");
+ abort();
+ }
+
+ if (--stream->chan->nr_stream_rotate_pending == 0) {
+ DBG("Rotation of channel \"%s\" completed, notifying the session daemon",
+ stream->chan->name);
+ ret = rotate_notify_sessiond(ctx, stream->chan->key);
+ }
+ pthread_mutex_unlock(&stream->chan->lock);
+
+ return ret;
+}
+
/*
* Thread polls on metadata file descriptor and write them on disk or on the
* network.
struct lttng_consumer_stream **local_stream = NULL, *new_stream = NULL;
/* local view of consumer_data.fds_count */
int nb_fd = 0;
+ /* 2 for the consumer_data_pipe and wake up pipe */
+ const int nb_pipes_fd = 2;
+ /* Number of FDs with CONSUMER_ENDPOINT_INACTIVE but still open. */
+ int nb_inactive_fd = 0;
struct lttng_consumer_local_data *ctx = data;
ssize_t len;
free(local_stream);
local_stream = NULL;
- /*
- * Allocate for all fds +1 for the consumer_data_pipe and +1 for
- * wake up pipe.
- */
- pollfd = zmalloc((consumer_data.stream_count + 2) * sizeof(struct pollfd));
+ /* Allocate for all fds */
+ pollfd = zmalloc((consumer_data.stream_count + nb_pipes_fd) * sizeof(struct pollfd));
if (pollfd == NULL) {
PERROR("pollfd malloc");
pthread_mutex_unlock(&consumer_data.lock);
goto end;
}
- local_stream = zmalloc((consumer_data.stream_count + 2) *
+ local_stream = zmalloc((consumer_data.stream_count + nb_pipes_fd) *
sizeof(struct lttng_consumer_stream *));
if (local_stream == NULL) {
PERROR("local_stream malloc");
goto end;
}
ret = update_poll_array(ctx, &pollfd, local_stream,
- data_ht);
+ data_ht, &nb_inactive_fd);
if (ret < 0) {
ERR("Error in allocating pollfd or local_outfds");
lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR);
pthread_mutex_unlock(&consumer_data.lock);
/* No FDs and consumer_quit, consumer_cleanup the thread */
- if (nb_fd == 0 && consumer_quit == 1) {
+ if (nb_fd == 0 && nb_inactive_fd == 0 &&
+ CMM_LOAD_SHARED(consumer_quit) == 1) {
err = 0; /* All is OK */
goto end;
}
/* poll on the array of fds */
restart:
- DBG("polling on %d fd", nb_fd + 2);
+ DBG("polling on %d fd", nb_fd + nb_pipes_fd);
if (testpoint(consumerd_thread_data_poll)) {
goto end;
}
health_poll_entry();
- num_rdy = poll(pollfd, nb_fd + 2, -1);
+ num_rdy = poll(pollfd, nb_fd + nb_pipes_fd, -1);
health_poll_exit();
DBG("poll num_rdy : %d", num_rdy);
if (num_rdy == -1) {
goto end;
}
+ if (caa_unlikely(data_consumption_paused)) {
+ DBG("Data consumption paused, sleeping...");
+ sleep(1);
+ goto restart;
+ }
+
/*
* If the consumer_data_pipe triggered poll go directly to the
* beginning of the loop to update the array. We want to prioritize
err = 0;
goto end;
}
- if (consumer_quit) {
+ if (CMM_LOAD_SHARED(consumer_quit)) {
DBG("consumer_thread_receive_fds received quit from signal");
err = 0; /* All is OK */
goto end;
* when all fds have hung up, the polling thread
* can exit cleanly
*/
- consumer_quit = 1;
+ CMM_STORE_SHARED(consumer_quit, 1);
/*
* Notify the data poll thread to poll back again and test the
struct lttng_consumer_local_data *ctx)
{
ssize_t ret;
+ int rotate_ret;
+ bool rotated = false;
pthread_mutex_lock(&stream->lock);
if (stream->metadata_flag) {
switch (consumer_data.type) {
case LTTNG_CONSUMER_KERNEL:
- ret = lttng_kconsumer_read_subbuffer(stream, ctx);
+ ret = lttng_kconsumer_read_subbuffer(stream, ctx, &rotated);
break;
case LTTNG_CONSUMER32_UST:
case LTTNG_CONSUMER64_UST:
- ret = lttng_ustconsumer_read_subbuffer(stream, ctx);
+ ret = lttng_ustconsumer_read_subbuffer(stream, ctx, &rotated);
break;
default:
ERR("Unknown consumer_data type");
pthread_mutex_unlock(&stream->metadata_rdv_lock);
}
pthread_mutex_unlock(&stream->lock);
+ if (rotated) {
+ rotate_ret = consumer_post_rotation(stream, ctx);
+ if (rotate_ret < 0) {
+ ERR("Failed after a rotation");
+ ret = -1;
+ }
+ }
+
return ret;
}
* This will create a relayd socket pair and add it to the relayd hash table.
* The caller MUST acquire a RCU read side lock before calling it.
*/
-int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
+ void consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
struct lttng_consumer_local_data *ctx, int sock,
struct pollfd *consumer_sockpoll,
struct lttcomm_relayd_sock *relayd_sock, uint64_t sessiond_id,
/* Not found. Allocate one. */
relayd = consumer_allocate_relayd_sock_pair(net_seq_idx);
if (relayd == NULL) {
- ret = -ENOMEM;
ret_code = LTTCOMM_CONSUMERD_ENOMEM;
goto error;
} else {
if (ret) {
/* Needing to exit in the middle of a command: error. */
lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR);
- ret = -EINTR;
goto error_nosignal;
}
/* Get relayd socket from session daemon */
ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1);
if (ret != sizeof(fd)) {
- ret = -1;
fd = -1; /* Just in case it gets set with an invalid value. */
/*
break;
default:
ERR("Unknown relayd socket type (%d)", sock_type);
- ret = -1;
ret_code = LTTCOMM_CONSUMERD_FATAL;
goto error;
}
* Add relayd socket pair to consumer data hashtable. If object already
* exists or on error, the function gracefully returns.
*/
+ relayd->ctx = ctx;
add_relayd(relayd);
/* All good! */
- return 0;
+ return;
error:
if (consumer_send_status_msg(sock, ret_code) < 0) {
if (relayd_created) {
free(relayd);
}
-
- return ret;
-}
-
-/*
- * Try to lock the stream mutex.
- *
- * On success, 1 is returned else 0 indicating that the mutex is NOT lock.
- */
-static int stream_try_lock(struct lttng_consumer_stream *stream)
-{
- int ret;
-
- assert(stream);
-
- /*
- * Try to lock the stream mutex. On failure, we know that the stream is
- * being used else where hence there is data still being extracted.
- */
- ret = pthread_mutex_trylock(&stream->lock);
- if (ret) {
- /* For both EBUSY and EINVAL error, the mutex is NOT locked. */
- ret = 0;
- goto end;
- }
-
- ret = 1;
-
-end:
- return ret;
}
/*
/* Ease our life a bit */
ht = consumer_data.stream_list_ht;
- relayd = find_relayd_by_session_id(id);
- if (relayd) {
- /* Send init command for data pending. */
- pthread_mutex_lock(&relayd->ctrl_sock_mutex);
- ret = relayd_begin_data_pending(&relayd->control_sock,
- relayd->relayd_session_id);
- pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
- if (ret < 0) {
- /* Communication error thus the relayd so no data pending. */
- goto data_not_pending;
- }
- }
-
cds_lfht_for_each_entry_duplicate(ht->ht,
ht->hash_fct(&id, lttng_ht_seed),
ht->match_fct, &id,
&iter.iter, stream, node_session_id.node) {
- /* If this call fails, the stream is being used hence data pending. */
- ret = stream_try_lock(stream);
- if (!ret) {
- goto data_pending;
- }
+ pthread_mutex_lock(&stream->lock);
/*
* A removed node from the hash table indicates that the stream has
}
}
- /* Relayd check */
- if (relayd) {
- pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ pthread_mutex_unlock(&stream->lock);
+ }
+
+ relayd = find_relayd_by_session_id(id);
+ if (relayd) {
+ unsigned int is_data_inflight = 0;
+
+ /* Send init command for data pending. */
+ pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ ret = relayd_begin_data_pending(&relayd->control_sock,
+ relayd->relayd_session_id);
+ if (ret < 0) {
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+ /* Communication error thus the relayd so no data pending. */
+ goto data_not_pending;
+ }
+
+ cds_lfht_for_each_entry_duplicate(ht->ht,
+ ht->hash_fct(&id, lttng_ht_seed),
+ ht->match_fct, &id,
+ &iter.iter, stream, node_session_id.node) {
if (stream->metadata_flag) {
ret = relayd_quiescent_control(&relayd->control_sock,
stream->relayd_stream_id);
stream->relayd_stream_id,
stream->next_net_seq_num - 1);
}
- pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+
if (ret == 1) {
- pthread_mutex_unlock(&stream->lock);
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
goto data_pending;
+ } else if (ret < 0) {
+ ERR("Relayd data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+ goto data_not_pending;
}
}
- pthread_mutex_unlock(&stream->lock);
- }
-
- if (relayd) {
- unsigned int is_data_inflight = 0;
- /* Send init command for data pending. */
- pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ /* Send end command for data pending. */
ret = relayd_end_data_pending(&relayd->control_sock,
relayd->relayd_session_id, &is_data_inflight);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
+ ERR("Relayd end data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
goto data_not_pending;
}
if (is_data_inflight) {
}
return start_pos;
}
+
+static
+int consumer_flush_buffer(struct lttng_consumer_stream *stream, int producer_active)
+{
+ int ret = 0;
+
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER_KERNEL:
+ ret = kernctl_buffer_flush(stream->wait_fd);
+ if (ret < 0) {
+ ERR("Failed to flush kernel stream");
+ goto end;
+ }
+ break;
+ case LTTNG_CONSUMER32_UST:
+ case LTTNG_CONSUMER64_UST:
+ lttng_ustctl_flush_buffer(stream, producer_active);
+ break;
+ default:
+ ERR("Unknown consumer_data type");
+ abort();
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Sample the rotate position for all the streams of a channel. If a stream
+ * is already at the rotate position (produced == consumed), we flag it as
+ * ready for rotation. The rotation of ready streams occurs after we have
+ * replied to the session daemon that we have finished sampling the positions.
+ *
+ * Returns 0 on success, < 0 on error
+ */
+int lttng_consumer_rotate_channel(uint64_t key, const char *path,
+ uint64_t relayd_id, uint32_t metadata, uint64_t new_chunk_id,
+ struct lttng_consumer_local_data *ctx)
+{
+ int ret;
+ struct lttng_consumer_channel *channel;
+ struct lttng_consumer_stream *stream;
+ struct lttng_ht_iter iter;
+ struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht;
+
+ DBG("Consumer sample rotate position for channel %" PRIu64, key);
+
+ rcu_read_lock();
+
+ channel = consumer_find_channel(key);
+ if (!channel) {
+ ERR("No channel found for key %" PRIu64, key);
+ ret = -1;
+ goto end;
+ }
+
+ pthread_mutex_lock(&channel->lock);
+ channel->current_chunk_id = new_chunk_id;
+
+ ret = lttng_strncpy(channel->pathname, path, sizeof(channel->pathname));
+ if (ret) {
+ ERR("Failed to copy new path to channel during channel rotation");
+ ret = -1;
+ goto end_unlock_channel;
+ }
+
+ if (relayd_id == -1ULL) {
+ /*
+ * The domain path (/ust or /kernel) has been created before, we
+ * now need to create the last part of the path: the application/user
+ * specific section (uid/1000/64-bit).
+ */
+ ret = utils_mkdir_recursive(channel->pathname, S_IRWXU | S_IRWXG,
+ channel->uid, channel->gid);
+ if (ret < 0) {
+ ERR("Failed to create trace directory at %s during rotation",
+ channel->pathname);
+ ret = -1;
+ goto end_unlock_channel;
+ }
+ }
+
+ cds_lfht_for_each_entry_duplicate(ht->ht,
+ ht->hash_fct(&channel->key, lttng_ht_seed),
+ ht->match_fct, &channel->key, &iter.iter,
+ stream, node_channel_id.node) {
+ unsigned long consumed_pos;
+
+ health_code_update();
+
+ /*
+ * Lock stream because we are about to change its state.
+ */
+ pthread_mutex_lock(&stream->lock);
+
+ ret = lttng_strncpy(stream->channel_read_only_attributes.path,
+ channel->pathname,
+ sizeof(stream->channel_read_only_attributes.path));
+ if (ret) {
+ ERR("Failed to sample channel path name during channel rotation");
+ goto end_unlock_stream;
+ }
+ ret = lttng_consumer_sample_snapshot_positions(stream);
+ if (ret < 0) {
+ ERR("Failed to sample snapshot position during channel rotation");
+ goto end_unlock_stream;
+ }
+
+ ret = lttng_consumer_get_produced_snapshot(stream,
+ &stream->rotate_position);
+ if (ret < 0) {
+ ERR("Failed to sample produced position during channel rotation");
+ goto end_unlock_stream;
+ }
+
+ lttng_consumer_get_consumed_snapshot(stream,
+ &consumed_pos);
+ if (consumed_pos == stream->rotate_position) {
+ stream->rotate_ready = true;
+ }
+ channel->nr_stream_rotate_pending++;
+
+ ret = consumer_flush_buffer(stream, 1);
+ if (ret < 0) {
+ ERR("Failed to flush stream %" PRIu64 " during channel rotation",
+ stream->key);
+ goto end_unlock_stream;
+ }
+
+ pthread_mutex_unlock(&stream->lock);
+ }
+ pthread_mutex_unlock(&channel->lock);
+
+ ret = 0;
+ goto end;
+
+end_unlock_stream:
+ pthread_mutex_unlock(&stream->lock);
+end_unlock_channel:
+ pthread_mutex_unlock(&channel->lock);
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
+/*
+ * Check if a stream is ready to be rotated after extracting it.
+ *
+ * Return 1 if it is ready for rotation, 0 if it is not, a negative value on
+ * error. Stream lock must be held.
+ */
+int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream)
+{
+ int ret;
+ unsigned long consumed_pos;
+
+ if (!stream->rotate_position && !stream->rotate_ready) {
+ ret = 0;
+ goto end;
+ }
+
+ if (stream->rotate_ready) {
+ ret = 1;
+ goto end;
+ }
+
+ /*
+ * If we don't have the rotate_ready flag, check the consumed position
+ * to determine if we need to rotate.
+ */
+ ret = lttng_consumer_sample_snapshot_positions(stream);
+ if (ret < 0) {
+ ERR("Taking snapshot positions");
+ goto end;
+ }
+
+ ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos);
+ if (ret < 0) {
+ ERR("Consumed snapshot position");
+ goto end;
+ }
+
+ /* Rotate position not reached yet (with check for overflow). */
+ if ((long) (consumed_pos - stream->rotate_position) < 0) {
+ ret = 0;
+ goto end;
+ }
+ ret = 1;
+
+end:
+ return ret;
+}
+
+/*
+ * Reset the state for a stream after a rotation occurred.
+ */
+void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream)
+{
+ stream->rotate_position = 0;
+ stream->rotate_ready = false;
+}
+
+/*
+ * Perform the rotation a local stream file.
+ */
+int rotate_local_stream(struct lttng_consumer_local_data *ctx,
+ struct lttng_consumer_stream *stream)
+{
+ int ret;
+
+ DBG("Rotate local stream: stream key %" PRIu64 ", channel key %" PRIu64 " at path %s",
+ stream->key,
+ stream->chan->key,
+ stream->channel_read_only_attributes.path);
+
+ ret = close(stream->out_fd);
+ if (ret < 0) {
+ PERROR("Closing trace file (fd %d), stream %" PRIu64,
+ stream->out_fd, stream->key);
+ assert(0);
+ goto error;
+ }
+
+ ret = utils_create_stream_file(
+ stream->channel_read_only_attributes.path,
+ stream->name,
+ stream->channel_read_only_attributes.tracefile_size,
+ stream->tracefile_count_current,
+ stream->uid, stream->gid, NULL);
+ if (ret < 0) {
+ ERR("Rotate create stream file");
+ goto error;
+ }
+ stream->out_fd = ret;
+ stream->tracefile_size_current = 0;
+
+ if (!stream->metadata_flag) {
+ struct lttng_index_file *index_file;
+
+ lttng_index_file_put(stream->index_file);
+
+ index_file = lttng_index_file_create(
+ stream->channel_read_only_attributes.path,
+ stream->name, stream->uid, stream->gid,
+ stream->channel_read_only_attributes.tracefile_size,
+ stream->tracefile_count_current,
+ CTF_INDEX_MAJOR, CTF_INDEX_MINOR);
+ if (!index_file) {
+ ERR("Create index file during rotation");
+ goto error;
+ }
+ stream->index_file = index_file;
+ stream->out_fd_offset = 0;
+ }
+
+ ret = 0;
+ goto end;
+
+error:
+ ret = -1;
+end:
+ return ret;
+
+}
+
+/*
+ * Perform the rotation a stream file on the relay.
+ */
+int rotate_relay_stream(struct lttng_consumer_local_data *ctx,
+ struct lttng_consumer_stream *stream)
+{
+ int ret;
+ struct consumer_relayd_sock_pair *relayd;
+
+ DBG("Rotate relay stream");
+ relayd = consumer_find_relayd(stream->net_seq_idx);
+ if (!relayd) {
+ ERR("Failed to find relayd");
+ ret = -1;
+ goto end;
+ }
+
+ pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ ret = relayd_rotate_stream(&relayd->control_sock,
+ stream->relayd_stream_id,
+ stream->channel_read_only_attributes.path,
+ stream->chan->current_chunk_id,
+ stream->last_sequence_number);
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+ if (ret < 0) {
+ ERR("Relayd rotate stream failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
+ }
+ if (ret) {
+ ERR("Rotate relay stream");
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Performs the stream rotation for the rotate session feature if needed.
+ * It must be called with the stream lock held.
+ *
+ * Return 0 on success, a negative number of error.
+ */
+int lttng_consumer_rotate_stream(struct lttng_consumer_local_data *ctx,
+ struct lttng_consumer_stream *stream, bool *rotated)
+{
+ int ret;
+
+ DBG("Consumer rotate stream %" PRIu64, stream->key);
+
+ if (stream->net_seq_idx != (uint64_t) -1ULL) {
+ ret = rotate_relay_stream(ctx, stream);
+ } else {
+ ret = rotate_local_stream(ctx, stream);
+ }
+ if (ret < 0) {
+ ERR("Rotate stream");
+ goto error;
+ }
+
+ if (stream->metadata_flag) {
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER_KERNEL:
+ /*
+ * Reset the position of what has been read from the metadata
+ * cache to 0 so we can dump it again.
+ */
+ ret = kernctl_metadata_cache_dump(stream->wait_fd);
+ if (ret < 0) {
+ ERR("Failed to dump the kernel metadata cache after rotation");
+ goto error;
+ }
+ break;
+ case LTTNG_CONSUMER32_UST:
+ case LTTNG_CONSUMER64_UST:
+ /*
+ * Reset the position pushed from the metadata cache so it
+ * will write from the beginning on the next push.
+ */
+ stream->ust_metadata_pushed = 0;
+ break;
+ default:
+ ERR("Unknown consumer_data type");
+ abort();
+ }
+ }
+ lttng_consumer_reset_stream_rotate_state(stream);
+
+ if (rotated) {
+ *rotated = true;
+ }
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+/*
+ * Rotate all the ready streams now.
+ *
+ * This is especially important for low throughput streams that have already
+ * been consumed, we cannot wait for their next packet to perform the
+ * rotation.
+ *
+ * Returns 0 on success, < 0 on error
+ */
+int lttng_consumer_rotate_ready_streams(uint64_t key,
+ struct lttng_consumer_local_data *ctx)
+{
+ int ret;
+ struct lttng_consumer_channel *channel;
+ struct lttng_consumer_stream *stream;
+ struct lttng_ht_iter iter;
+ struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht;
+
+ rcu_read_lock();
+
+ DBG("Consumer rotate ready streams in channel %" PRIu64, key);
+
+ channel = consumer_find_channel(key);
+ if (!channel) {
+ ERR("No channel found for key %" PRIu64, key);
+ ret = -1;
+ goto end;
+ }
+
+ cds_lfht_for_each_entry_duplicate(ht->ht,
+ ht->hash_fct(&channel->key, lttng_ht_seed),
+ ht->match_fct, &channel->key, &iter.iter,
+ stream, node_channel_id.node) {
+ health_code_update();
+
+ pthread_mutex_lock(&stream->lock);
+
+ if (!stream->rotate_ready) {
+ pthread_mutex_unlock(&stream->lock);
+ continue;
+ }
+ DBG("Consumer rotate ready stream %" PRIu64, stream->key);
+
+ ret = lttng_consumer_rotate_stream(ctx, stream, NULL);
+ pthread_mutex_unlock(&stream->lock);
+ if (ret) {
+ goto end;
+ }
+
+ ret = consumer_post_rotation(stream, ctx);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ ret = 0;
+
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
+static
+int rotate_rename_local(const char *old_path, const char *new_path,
+ uid_t uid, gid_t gid)
+{
+ int ret;
+
+ assert(old_path);
+ assert(new_path);
+
+ ret = utils_mkdir_recursive(new_path, S_IRWXU | S_IRWXG, uid, gid);
+ if (ret < 0) {
+ ERR("Create directory on rotate");
+ goto end;
+ }
+
+ ret = rename(old_path, new_path);
+ if (ret < 0 && errno != ENOENT) {
+ PERROR("Rename completed rotation chunk");
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
+static
+int rotate_rename_relay(const char *old_path, const char *new_path,
+ uint64_t relayd_id)
+{
+ int ret;
+ struct consumer_relayd_sock_pair *relayd;
+
+ relayd = consumer_find_relayd(relayd_id);
+ if (!relayd) {
+ ERR("Failed to find relayd while running rotate_rename_relay command");
+ ret = -1;
+ goto end;
+ }
+
+ pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ ret = relayd_rotate_rename(&relayd->control_sock, old_path, new_path);
+ if (ret < 0) {
+ ERR("Relayd rotate rename failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
+ }
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+end:
+ return ret;
+}
+
+int lttng_consumer_rotate_rename(const char *old_path, const char *new_path,
+ uid_t uid, gid_t gid, uint64_t relayd_id)
+{
+ if (relayd_id != -1ULL) {
+ return rotate_rename_relay(old_path, new_path, relayd_id);
+ } else {
+ return rotate_rename_local(old_path, new_path, uid, gid);
+ }
+}
+
+int lttng_consumer_rotate_pending_relay(uint64_t session_id,
+ uint64_t relayd_id, uint64_t chunk_id)
+{
+ int ret;
+ struct consumer_relayd_sock_pair *relayd;
+
+ relayd = consumer_find_relayd(relayd_id);
+ if (!relayd) {
+ ERR("Failed to find relayd");
+ ret = -1;
+ goto end;
+ }
+
+ pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ ret = relayd_rotate_pending(&relayd->control_sock, chunk_id);
+ if (ret < 0) {
+ ERR("Relayd rotate pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
+ }
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+
+end:
+ return ret;
+}
+
+static
+int mkdir_local(const char *path, uid_t uid, gid_t gid)
+{
+ int ret;
+
+ ret = utils_mkdir_recursive(path, S_IRWXU | S_IRWXG, uid, gid);
+ if (ret < 0) {
+ /* utils_mkdir_recursive logs an error. */
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
+static
+int mkdir_relay(const char *path, uint64_t relayd_id)
+{
+ int ret;
+ struct consumer_relayd_sock_pair *relayd;
+
+ relayd = consumer_find_relayd(relayd_id);
+ if (!relayd) {
+ ERR("Failed to find relayd");
+ ret = -1;
+ goto end;
+ }
+
+ pthread_mutex_lock(&relayd->ctrl_sock_mutex);
+ ret = relayd_mkdir(&relayd->control_sock, path);
+ if (ret < 0) {
+ ERR("Relayd mkdir failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx);
+ lttng_consumer_cleanup_relayd(relayd);
+ }
+ pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
+
+end:
+ return ret;
+
+}
+
+int lttng_consumer_mkdir(const char *path, uid_t uid, gid_t gid,
+ uint64_t relayd_id)
+{
+ if (relayd_id != -1ULL) {
+ return mkdir_relay(path, relayd_id);
+ } else {
+ return mkdir_local(path, uid, gid);
+ }
+}
projects / lttng-tools.git / blobdiff