X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng-sessiond%2Fust-consumer.c;h=866d7bd56bc199e8bed90b2e3abc1ec88f48a070;hp=444ff6eeea9f6b79c1c93259890927b52a27bf28;hb=84cd17c63cde7ea5d7a0ad037dd41e8297658812;hpb=5af2f756eb72d460d304318550afc782279452b9

diff --git a/lttng-sessiond/ust-consumer.c b/lttng-sessiond/ust-consumer.c
index 444ff6eee..866d7bd56 100644
--- a/lttng-sessiond/ust-consumer.c
+++ b/lttng-sessiond/ust-consumer.c
@@ -38,7 +38,7 @@ static int send_channel_streams(int sock,
 {
 	int ret, fd;
 	struct lttcomm_consumer_msg lum;
-	struct ltt_ust_stream *stream;
+	struct ltt_ust_stream *stream, *tmp;
 
 	DBG("Sending streams of channel %s to UST consumer", uchan->name);
 
@@ -46,8 +46,11 @@ static int send_channel_streams(int sock,
 	lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
 
 	/*
-	 * We need to keep shm_fd open to make sure this key stays unique within
-	 * the session daemon.
+	 * We need to keep shm_fd open while we transfer the stream file
+	 * descriptors to make sure this key stays unique within the
+	 * session daemon. We can free the channel shm_fd without
+	 * problem after we finished sending stream fds for that
+	 * channel.
 	 */
 	lum.u.channel.channel_key = uchan->obj->shm_fd;
 	lum.u.channel.max_sb_size = uchan->attr.subbuf_size;
@@ -65,7 +68,7 @@ static int send_channel_streams(int sock,
 		goto error;
 	}
 
-	cds_list_for_each_entry(stream, &uchan->streams.head, list) {
+	cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) {
 		int fds[2];
 
 		if (!stream->obj->shm_fd) {
@@ -75,7 +78,11 @@ static int send_channel_streams(int sock,
 		lum.u.stream.channel_key = uchan->obj->shm_fd;
 		lum.u.stream.stream_key = stream->obj->shm_fd;
 		lum.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM;
-		lum.u.stream.output = uchan->attr.output;
+		/*
+		 * FIXME Hack alert! we force MMAP for now. Mixup
+		 * between EVENT and UST enums elsewhere.
+		 */
+		lum.u.stream.output = DEFAULT_UST_CHANNEL_OUTPUT;
 		lum.u.stream.mmap_len = stream->obj->memory_map_size;
 		strncpy(lum.u.stream.path_name, stream->pathname, PATH_MAX - 1);
 		lum.u.stream.path_name[PATH_MAX - 1] = '\0';
@@ -171,6 +178,7 @@ int ust_consumer_send_session(int consumer_fd, struct ust_app_session *usess)
 
 		ret = send_channel_streams(sock, uchan);
 		if (ret < 0) {
+			rcu_read_unlock();
 			goto error;
 		}
 		hashtable_get_next(usess->channels, &iter);