#include <inttypes.h>
#include <unistd.h>
#include <urcu/list.h>
+#include <signal.h>
#include <common/common.h>
#include <common/sessiond-comm/sessiond-comm.h>
#include <common/relayd/relayd.h>
#include <common/compat/fcntl.h>
+#include <common/consumer-metadata-cache.h>
+#include <common/consumer-timer.h>
+#include <common/utils.h>
#include "ust-consumer.h"
if (ctx->on_recv_channel != NULL) {
ret = ctx->on_recv_channel(channel);
if (ret == 0) {
- ret = consumer_add_channel(channel);
+ ret = consumer_add_channel(channel, ctx);
} else if (ret < 0) {
/* Most likely an ENOMEM. */
lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR);
goto error;
}
} else {
- ret = consumer_add_channel(channel);
+ ret = consumer_add_channel(channel, ctx);
}
DBG("UST consumer channel added (key: %" PRIu64 ")", channel->key);
*/
static struct lttng_consumer_channel *allocate_channel(uint64_t session_id,
const char *pathname, const char *name, uid_t uid, gid_t gid,
- int relayd_id, uint64_t key, enum lttng_event_output output)
+ int relayd_id, uint64_t key, enum lttng_event_output output,
+ uint64_t tracefile_size, uint64_t tracefile_count)
{
assert(pathname);
assert(name);
return consumer_allocate_channel(key, session_id, pathname, name, uid, gid,
- relayd_id, output);
+ relayd_id, output, tracefile_size, tracefile_count);
}
/*
static int send_stream_to_thread(struct lttng_consumer_stream *stream,
struct lttng_consumer_local_data *ctx)
{
- int ret, stream_pipe;
+ int ret;
+ struct lttng_pipe *stream_pipe;
/* Get the right pipe where the stream will be sent. */
if (stream->metadata_flag) {
- stream_pipe = ctx->consumer_metadata_pipe[1];
+ stream_pipe = ctx->consumer_metadata_pipe;
} else {
- stream_pipe = ctx->consumer_data_pipe[1];
+ stream_pipe = ctx->consumer_data_pipe;
}
- do {
- ret = write(stream_pipe, &stream, sizeof(stream));
- } while (ret < 0 && errno == EINTR);
+ ret = lttng_pipe_write(stream_pipe, &stream, sizeof(stream));
if (ret < 0) {
- PERROR("Consumer write %s stream to pipe %d",
- stream->metadata_flag ? "metadata" : "data", stream_pipe);
+ ERR("Consumer write %s stream to pipe %d",
+ stream->metadata_flag ? "metadata" : "data",
+ lttng_pipe_get_writefd(stream_pipe));
}
return ret;
pthread_mutex_lock(&relayd->ctrl_sock_mutex);
/* Add stream on the relayd */
ret = relayd_add_stream(&relayd->control_sock, stream->name,
- stream->chan->pathname, &stream->relayd_stream_id);
+ stream->chan->pathname, &stream->relayd_stream_id,
+ stream->chan->tracefile_size,
+ stream->chan->tracefile_count);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
goto error;
*/
stream->wait_fd = wait_fd;
+ /*
+ * Increment channel refcount since the channel reference has now been
+ * assigned in the allocation process above.
+ */
+ uatomic_inc(&stream->chan->refcount);
+
/*
* Order is important this is why a list is used. On error, the caller
* should clean this list.
goto error;
}
- ret = ustctl_stream_close_wakeup_fd(stream->ustream);
- if (ret < 0) {
- goto error;
- }
-
error:
return ret;
}
struct lttng_consumer_channel *channel,
struct lttng_consumer_local_data *ctx, int *relayd_error)
{
- int ret;
+ int ret, ret_code = LTTNG_OK;
struct lttng_consumer_stream *stream;
assert(channel);
DBG("UST consumer sending channel %s to sessiond", channel->name);
- /* Send channel to sessiond. */
- ret = ustctl_send_channel_to_sessiond(sock, channel->uchan);
- if (ret < 0) {
- goto error;
- }
-
- /* The channel was sent successfully to the sessiond at this point. */
cds_list_for_each_entry(stream, &channel->streams.head, send_node) {
/* Try to send the stream to the relayd if one is available. */
ret = send_stream_to_relayd(stream);
if (relayd_error) {
*relayd_error = 1;
}
- goto error;
+ ret_code = LTTNG_ERR_RELAYD_CONNECT_FAIL;
}
+ }
+
+ /* Inform sessiond that we are about to send channel and streams. */
+ ret = consumer_send_status_msg(sock, ret_code);
+ if (ret < 0 || ret_code != LTTNG_OK) {
+ /*
+ * Either the session daemon is not responding or the relayd died so we
+ * stop now.
+ */
+ goto error;
+ }
+ /* Send channel to sessiond. */
+ ret = ustctl_send_channel_to_sessiond(sock, channel->uchan);
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = ustctl_channel_close_wakeup_fd(channel->uchan);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* The channel was sent successfully to the sessiond at this point. */
+ cds_list_for_each_entry(stream, &channel->streams.head, send_node) {
/* Send stream to session daemon. */
ret = send_sessiond_stream(sock, stream);
if (ret < 0) {
return 0;
error:
+ if (ret_code != LTTNG_OK) {
+ ret = -1;
+ }
return ret;
}
goto error;
}
+ channel->wait_fd = ustctl_channel_get_wait_fd(channel->uchan);
+
/* Open all streams for this channel. */
ret = create_ust_streams(channel, ctx);
if (ret < 0) {
/*
* Write metadata to the given channel using ustctl to convert the string to
* the ringbuffer.
+ * Called only from consumer_metadata_cache_write.
+ * The metadata cache lock MUST be acquired to write in the cache.
*
* Return 0 on success else a negative value.
*/
-static int push_metadata(struct lttng_consumer_channel *metadata,
+int lttng_ustconsumer_push_metadata(struct lttng_consumer_channel *metadata,
const char *metadata_str, uint64_t target_offset, uint64_t len)
{
int ret;
DBG("UST consumer writing metadata to channel %s", metadata->name);
- assert(target_offset == metadata->contig_metadata_written);
- ret = ustctl_write_metadata_to_channel(metadata->uchan, metadata_str, len);
+ if (!metadata->metadata_stream) {
+ ret = 0;
+ goto error;
+ }
+
+ assert(target_offset <= metadata->metadata_cache->max_offset);
+ ret = ustctl_write_metadata_to_channel(metadata->uchan,
+ metadata_str + target_offset, len);
if (ret < 0) {
- ERR("ustctl write metadata fail with ret %d, len %ld", ret, len);
+ ERR("ustctl write metadata fail with ret %d, len %" PRIu64, ret, len);
goto error;
}
- metadata->contig_metadata_written += len;
ustctl_flush_buffer(metadata->metadata_stream->ustream, 1);
return ret;
}
+/*
+ * Flush channel's streams using the given key to retrieve the channel.
+ *
+ * Return 0 on success else an LTTng error code.
+ */
+static int flush_channel(uint64_t chan_key)
+{
+ int ret = 0;
+ struct lttng_consumer_channel *channel;
+ struct lttng_consumer_stream *stream;
+ struct lttng_ht *ht;
+ struct lttng_ht_iter iter;
+
+ DBG("UST consumer flush channel key %" PRIu64, chan_key);
+
+ rcu_read_lock();
+ channel = consumer_find_channel(chan_key);
+ if (!channel) {
+ ERR("UST consumer flush channel %" PRIu64 " not found", chan_key);
+ ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
+ goto error;
+ }
+
+ ht = consumer_data.stream_per_chan_id_ht;
+
+ /* For each stream of the channel id, flush it. */
+ 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) {
+ ustctl_flush_buffer(stream->ustream, 1);
+ }
+error:
+ rcu_read_unlock();
+ return ret;
+}
+
/*
* Close metadata stream wakeup_fd using the given key to retrieve the channel.
+ * RCU read side lock MUST be acquired before calling this function.
*
* Return 0 on success else an LTTng error code.
*/
static int close_metadata(uint64_t chan_key)
{
- int ret;
+ int ret = 0;
struct lttng_consumer_channel *channel;
- DBG("UST consumer close metadata key %lu", chan_key);
+ DBG("UST consumer close metadata key %" PRIu64, chan_key);
channel = consumer_find_channel(chan_key);
if (!channel) {
- ERR("UST consumer close metadata %lu not found", chan_key);
+ /*
+ * This is possible if the metadata thread has issue a delete because
+ * the endpoint point of the stream hung up. There is no way the
+ * session daemon can know about it thus use a DBG instead of an actual
+ * error.
+ */
+ DBG("UST consumer close metadata %" PRIu64 " not found", chan_key);
ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
goto error;
}
- ret = ustctl_stream_close_wakeup_fd(channel->metadata_stream->ustream);
- if (ret < 0) {
- ERR("UST consumer unable to close fd of metadata (ret: %d)", ret);
- ret = LTTCOMM_CONSUMERD_ERROR_METADATA;
- goto error;
+ pthread_mutex_lock(&consumer_data.lock);
+
+ if (cds_lfht_is_node_deleted(&channel->node.node)) {
+ goto error_unlock;
+ }
+
+ if (channel->switch_timer_enabled == 1) {
+ DBG("Deleting timer on metadata channel");
+ consumer_timer_switch_stop(channel);
}
+ if (channel->metadata_stream) {
+ ret = ustctl_stream_close_wakeup_fd(channel->metadata_stream->ustream);
+ if (ret < 0) {
+ ERR("UST consumer unable to close fd of metadata (ret: %d)", ret);
+ ret = LTTCOMM_CONSUMERD_ERROR_METADATA;
+ goto error_unlock;
+ }
+ }
+
+error_unlock:
+ pthread_mutex_unlock(&consumer_data.lock);
error:
return ret;
}
int ret;
struct lttng_consumer_channel *metadata;
- DBG("UST consumer setup metadata key %lu", key);
+ DBG("UST consumer setup metadata key %" PRIu64, key);
metadata = consumer_find_channel(key);
if (!metadata) {
ERR("UST consumer push metadata %" PRIu64 " not found", key);
ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto error;
+ goto error_find;
}
/*
/* List MUST be empty after or else it could be reused. */
assert(cds_list_empty(&metadata->streams.head));
- ret = 0;
+ return 0;
error:
+ /*
+ * Delete metadata channel on error. At this point, the metadata stream can
+ * NOT be monitored by the metadata thread thus having the guarantee that
+ * the stream is still in the local stream list of the channel. This call
+ * will make sure to clean that list.
+ */
+ consumer_del_channel(metadata);
+error_find:
return ret;
}
+/*
+ * Receive the metadata updates from the sessiond.
+ */
+int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
+ uint64_t len, struct lttng_consumer_channel *channel)
+{
+ int ret, ret_code = LTTNG_OK;
+ char *metadata_str;
+
+ DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len);
+
+ metadata_str = zmalloc(len * sizeof(char));
+ if (!metadata_str) {
+ PERROR("zmalloc metadata string");
+ ret_code = LTTCOMM_CONSUMERD_ENOMEM;
+ goto end;
+ }
+
+ /* Receive metadata string. */
+ ret = lttcomm_recv_unix_sock(sock, metadata_str, len);
+ if (ret < 0) {
+ /* Session daemon is dead so return gracefully. */
+ ret_code = ret;
+ goto end_free;
+ }
+
+ /*
+ * XXX: The consumer data lock is acquired before calling metadata cache
+ * write which calls push metadata that MUST be protected by the consumer
+ * lock in order to be able to check the validity of the metadata stream of
+ * the channel.
+ *
+ * Note that this will be subject to change to better fine grained locking
+ * and ultimately try to get rid of this global consumer data lock.
+ */
+ pthread_mutex_lock(&consumer_data.lock);
+
+ pthread_mutex_lock(&channel->metadata_cache->lock);
+ ret = consumer_metadata_cache_write(channel, offset, len, metadata_str);
+ if (ret < 0) {
+ /* Unable to handle metadata. Notify session daemon. */
+ ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA;
+ /*
+ * Skip metadata flush on write error since the offset and len might
+ * not have been updated which could create an infinite loop below when
+ * waiting for the metadata cache to be flushed.
+ */
+ pthread_mutex_unlock(&channel->metadata_cache->lock);
+ pthread_mutex_unlock(&consumer_data.lock);
+ goto end_free;
+ }
+ pthread_mutex_unlock(&channel->metadata_cache->lock);
+ pthread_mutex_unlock(&consumer_data.lock);
+
+ while (consumer_metadata_cache_flushed(channel, offset + len)) {
+ DBG("Waiting for metadata to be flushed");
+ usleep(DEFAULT_METADATA_AVAILABILITY_WAIT_TIME);
+ }
+
+end_free:
+ free(metadata_str);
+end:
+ return ret_code;
+}
+
/*
* Receive command from session daemon and process it.
*
* The ret value might 0 meaning an orderly shutdown but this is ok
* since the caller handles this.
*/
+ if (ret > 0) {
+ ret = -1;
+ }
return ret;
}
if (msg.cmd_type == LTTNG_CONSUMER_STOP) {
sizeof(is_data_pending));
if (ret < 0) {
DBG("Error when sending the data pending ret code: %d", ret);
+ goto error_fatal;
}
/*
msg.u.ask_channel.pathname, msg.u.ask_channel.name,
msg.u.ask_channel.uid, msg.u.ask_channel.gid,
msg.u.ask_channel.relayd_id, msg.u.ask_channel.key,
- (enum lttng_event_output) msg.u.ask_channel.output);
+ (enum lttng_event_output) msg.u.ask_channel.output,
+ msg.u.ask_channel.tracefile_size,
+ msg.u.ask_channel.tracefile_count);
if (!channel) {
goto end_channel_error;
}
attr.overwrite = msg.u.ask_channel.overwrite;
attr.switch_timer_interval = msg.u.ask_channel.switch_timer_interval;
attr.read_timer_interval = msg.u.ask_channel.read_timer_interval;
+ attr.chan_id = msg.u.ask_channel.chan_id;
memcpy(attr.uuid, msg.u.ask_channel.uuid, sizeof(attr.uuid));
/* Translate the event output type to UST. */
case LTTNG_UST_CHAN_PER_CPU:
channel->type = CONSUMER_CHANNEL_TYPE_DATA;
attr.type = LTTNG_UST_CHAN_PER_CPU;
+ /*
+ * Set refcount to 1 for owner. Below, we will
+ * pass ownership to the
+ * consumer_thread_channel_poll() thread.
+ */
+ channel->refcount = 1;
break;
case LTTNG_UST_CHAN_METADATA:
channel->type = CONSUMER_CHANNEL_TYPE_METADATA;
goto end_channel_error;
}
+ if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) {
+ ret = consumer_metadata_cache_allocate(channel);
+ if (ret < 0) {
+ ERR("Allocating metadata cache");
+ goto end_channel_error;
+ }
+ consumer_timer_switch_start(channel, attr.switch_timer_interval);
+ attr.switch_timer_interval = 0;
+ }
+
/*
* Add the channel to the internal state AFTER all streams were created
* and successfully sent to session daemon. This way, all streams must
* be ready before this channel is visible to the threads.
+ * If add_channel succeeds, ownership of the channel is
+ * passed to consumer_thread_channel_poll().
*/
ret = add_channel(channel, ctx);
if (ret < 0) {
+ if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) {
+ if (channel->switch_timer_enabled == 1) {
+ consumer_timer_switch_stop(channel);
+ }
+ consumer_metadata_cache_destroy(channel);
+ }
goto end_channel_error;
}
ret = consumer_send_status_channel(sock, channel);
if (ret < 0) {
/*
- * There is probably a problem on the socket so the poll will get
- * it and clean everything up.
+ * There is probably a problem on the socket.
*/
- goto end_nosignal;
+ goto error_fatal;
}
break;
channel = consumer_find_channel(key);
if (!channel) {
- ERR("UST consumer get channel key %lu not found", key);
+ ERR("UST consumer get channel key %" PRIu64 " not found", key);
ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND;
goto end_msg_sessiond;
}
- /* Inform sessiond that we are about to send channel and streams. */
- ret = consumer_send_status_msg(sock, LTTNG_OK);
- if (ret < 0) {
- /* Somehow, the session daemon is not responding anymore. */
- goto end_nosignal;
- }
-
/* Send everything to sessiond. */
ret = send_sessiond_channel(sock, channel, ctx, &relayd_err);
if (ret < 0) {
/*
* We were unable to send to the relayd the stream so avoid
* sending back a fatal error to the thread since this is OK
- * and the consumer can continue its work.
+ * and the consumer can continue its work. The above call
+ * has sent the error status message to the sessiond.
*/
- ret_code = LTTNG_ERR_RELAYD_CONNECT_FAIL;
- goto end_msg_sessiond;
+ goto end_nosignal;
}
/*
* The communicaton was broken hence there is a bad state between
case LTTNG_CONSUMER_DESTROY_CHANNEL:
{
uint64_t key = msg.u.destroy_channel.key;
- struct lttng_consumer_channel *channel;
-
- channel = consumer_find_channel(key);
- if (!channel) {
- ERR("UST consumer get channel key %lu not found", key);
- ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto end_msg_sessiond;
- }
-
- destroy_channel(channel);
+ /*
+ * Only called if streams have not been sent to stream
+ * manager thread. However, channel has been sent to
+ * channel manager thread.
+ */
+ notify_thread_del_channel(ctx, key);
goto end_msg_sessiond;
}
case LTTNG_CONSUMER_CLOSE_METADATA:
goto end_msg_sessiond;
}
+ case LTTNG_CONSUMER_FLUSH_CHANNEL:
+ {
+ int ret;
+
+ ret = flush_channel(msg.u.flush_channel.key);
+ if (ret != 0) {
+ ret_code = ret;
+ }
+
+ goto end_msg_sessiond;
+ }
case LTTNG_CONSUMER_PUSH_METADATA:
{
int ret;
uint64_t len = msg.u.push_metadata.len;
- uint64_t target_offset = msg.u.push_metadata.target_offset;
uint64_t key = msg.u.push_metadata.key;
+ uint64_t offset = msg.u.push_metadata.target_offset;
struct lttng_consumer_channel *channel;
- char *metadata_str;
- DBG("UST consumer push metadata key %lu of len %lu", key, len);
+ DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key,
+ len);
channel = consumer_find_channel(key);
if (!channel) {
- ERR("UST consumer push metadata %lu not found", key);
+ ERR("UST consumer push metadata %" PRIu64 " not found", key);
ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- }
-
- metadata_str = zmalloc(len * sizeof(char));
- if (!metadata_str) {
- PERROR("zmalloc metadata string");
- ret_code = LTTCOMM_CONSUMERD_ENOMEM;
goto end_msg_sessiond;
}
/* Wait for more data. */
if (lttng_consumer_poll_socket(consumer_sockpoll) < 0) {
- goto end_nosignal;
- }
-
- /* Receive metadata string. */
- ret = lttcomm_recv_unix_sock(sock, metadata_str, len);
- if (ret < 0) {
- /* Session daemon is dead so return gracefully. */
- goto end_nosignal;
+ goto error_fatal;
}
- ret = push_metadata(channel, metadata_str, target_offset, len);
- free(metadata_str);
+ ret = lttng_ustconsumer_recv_metadata(sock, key, offset,
+ len, channel);
if (ret < 0) {
- /* Unable to handle metadata. Notify session daemon. */
- ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA;
+ /* error receiving from sessiond */
+ goto error_fatal;
+ } else {
+ ret_code = ret;
goto end_msg_sessiond;
}
-
- goto end_msg_sessiond;
}
case LTTNG_CONSUMER_SETUP_METADATA:
{
}
goto end_msg_sessiond;
}
+ case LTTNG_CONSUMER_SNAPSHOT_CHANNEL:
+ {
+ ret = consumer_send_status_msg(sock, ret_code);
+ if (ret < 0) {
+ /* Somehow, the session daemon is not responding anymore. */
+ goto end_nosignal;
+ }
+ break;
+ }
default:
break;
}
* the caller because the session daemon socket management is done
* elsewhere. Returning a negative code or 0 will shutdown the consumer.
*/
- (void) consumer_send_status_msg(sock, ret_code);
+ ret = consumer_send_status_msg(sock, ret_code);
+ if (ret < 0) {
+ goto error_fatal;
+ }
rcu_read_unlock();
return 1;
end_channel_error:
assert(chan);
assert(chan->uchan);
+ if (chan->switch_timer_enabled == 1) {
+ consumer_timer_switch_stop(chan);
+ }
+ consumer_metadata_cache_destroy(chan);
ustctl_destroy_channel(chan->uchan);
}
assert(stream);
assert(stream->ustream);
+ if (stream->chan->switch_timer_enabled == 1) {
+ consumer_timer_switch_stop(stream->chan);
+ }
ustctl_destroy_stream(stream->ustream);
}
* happen and it is OK with the code flow.
*/
DBG("Error writing to tracefile "
- "(ret: %zd != len: %lu != subbuf_size: %lu)",
+ "(ret: %ld != len: %lu != subbuf_size: %lu)",
ret, len, subbuf_size);
}
err = ustctl_put_next_subbuf(ustream);
assert(err == 0);
+
end:
return ret;
}
/*
* Called when a stream is created.
+ *
+ * Return 0 on success or else a negative value.
*/
int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
{
int ret;
- char full_path[PATH_MAX];
-
- /* Opening the tracefile in write mode */
- if (stream->net_seq_idx != (uint64_t) -1ULL) {
- goto end;
- }
- ret = snprintf(full_path, sizeof(full_path), "%s/%s",
- stream->chan->pathname, stream->name);
- if (ret < 0) {
- PERROR("snprintf on_recv_stream");
- goto error;
- }
-
- ret = run_as_open(full_path, O_WRONLY | O_CREAT | O_TRUNC,
- S_IRWXU | S_IRWXG | S_IRWXO, stream->uid, stream->gid);
- if (ret < 0) {
- PERROR("open stream path %s", full_path);
- goto error;
+ /* Don't create anything if this is set for streaming. */
+ if (stream->net_seq_idx == (uint64_t) -1ULL) {
+ ret = utils_create_stream_file(stream->chan->pathname, stream->name,
+ stream->chan->tracefile_size, stream->tracefile_count_current,
+ stream->uid, stream->gid);
+ if (ret < 0) {
+ goto error;
+ }
+ stream->out_fd = ret;
+ stream->tracefile_size_current = 0;
}
- stream->out_fd = ret;
-
-end:
- /* we return 0 to let the library handle the FD internally */
- return 0;
+ ret = 0;
error:
return ret;
}
rcu_read_unlock();
}
+
+void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream)
+{
+ int ret;
+
+ ret = ustctl_stream_close_wakeup_fd(stream->ustream);
+ if (ret < 0) {
+ ERR("Unable to close wakeup fd");
+ }
+}
+
+int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
+ struct lttng_consumer_channel *channel)
+{
+ struct lttcomm_metadata_request_msg request;
+ struct lttcomm_consumer_msg msg;
+ enum lttng_error_code ret_code = LTTNG_OK;
+ uint64_t len, key, offset;
+ int ret;
+
+ assert(channel);
+ assert(channel->metadata_cache);
+
+ /* send the metadata request to sessiond */
+ switch (consumer_data.type) {
+ case LTTNG_CONSUMER64_UST:
+ request.bits_per_long = 64;
+ break;
+ case LTTNG_CONSUMER32_UST:
+ request.bits_per_long = 32;
+ break;
+ default:
+ request.bits_per_long = 0;
+ break;
+ }
+
+ request.session_id = channel->session_id;
+ request.uid = channel->uid;
+ request.key = channel->key;
+ DBG("Sending metadata request to sessiond, session %" PRIu64,
+ channel->session_id);
+
+ ret = lttcomm_send_unix_sock(ctx->consumer_metadata_socket, &request,
+ sizeof(request));
+ if (ret < 0) {
+ ERR("Asking metadata to sessiond");
+ goto end;
+ }
+
+ /* Receive the metadata from sessiond */
+ ret = lttcomm_recv_unix_sock(ctx->consumer_metadata_socket, &msg,
+ sizeof(msg));
+ if (ret != sizeof(msg)) {
+ DBG("Consumer received unexpected message size %d (expects %zu)",
+ ret, sizeof(msg));
+ lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD);
+ /*
+ * The ret value might 0 meaning an orderly shutdown but this is ok
+ * since the caller handles this.
+ */
+ goto end;
+ }
+
+ if (msg.cmd_type == LTTNG_ERR_UND) {
+ /* No registry found */
+ (void) consumer_send_status_msg(ctx->consumer_metadata_socket,
+ ret_code);
+ ret = 0;
+ goto end;
+ } else if (msg.cmd_type != LTTNG_CONSUMER_PUSH_METADATA) {
+ ERR("Unexpected cmd_type received %d", msg.cmd_type);
+ ret = -1;
+ goto end;
+ }
+
+ len = msg.u.push_metadata.len;
+ key = msg.u.push_metadata.key;
+ offset = msg.u.push_metadata.target_offset;
+
+ assert(key == channel->key);
+ if (len == 0) {
+ DBG("No new metadata to receive for key %" PRIu64, key);
+ }
+
+ /* Tell session daemon we are ready to receive the metadata. */
+ ret = consumer_send_status_msg(ctx->consumer_metadata_socket,
+ LTTNG_OK);
+ if (ret < 0 || len == 0) {
+ /*
+ * Somehow, the session daemon is not responding anymore or there is
+ * nothing to receive.
+ */
+ goto end;
+ }
+
+ ret_code = lttng_ustconsumer_recv_metadata(ctx->consumer_metadata_socket,
+ key, offset, len, channel);
+ if (ret_code >= 0) {
+ /*
+ * Only send the status msg if the sessiond is alive meaning a positive
+ * ret code.
+ */
+ (void) consumer_send_status_msg(ctx->consumer_metadata_socket, ret_code);
+ }
+ ret = 0;
+
+end:
+ return ret;
+}
projects / lttng-tools.git / blobdiff