Support flight recorder mode for a session

[lttng-tools.git] / src / common / kernel-consumer / kernel-consumer.c

diff --git a/src/common/kernel-consumer/kernel-consumer.c b/src/common/kernel-consumer/kernel-consumer.c
index 11830fc05a087f4f601a3156560ac5b7a6735365..86428f0663141fa250905e269d7ceea22c5cb43d 100644 (file)
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -144,7 +144,8 @@ int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                                msg.u.channel.name, msg.u.channel.uid, msg.u.channel.gid,
                                msg.u.channel.relayd_id, msg.u.channel.output,
                                msg.u.channel.tracefile_size,
-                               msg.u.channel.tracefile_count);
+                               msg.u.channel.tracefile_count,
+                               msg.u.channel.monitor);
                if (new_channel == NULL) {
                        lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR);
                        goto end_nosignal;
@@ -317,6 +318,14 @@ int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                        }
                }
 
+               /* Do not monitor this stream. */
+               if (!channel->monitor) {
+                       DBG("Kernel consumer add stream %s in no monitor mode with"
+                                       "relayd id %" PRIu64, new_stream->name,
+                                       new_stream->relayd_stream_id);
+                       break;
+               }
+
                /* Get the right pipe where the stream will be sent. */
                if (new_stream->metadata_flag) {
                        stream_pipe = ctx->consumer_metadata_pipe;
@@ -400,6 +409,15 @@ int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                 */
                break;
        }
+       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:
                goto end_nosignal;
        }
@@ -545,8 +563,11 @@ int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
 
        assert(stream);
 
-       /* Don't create anything if this is set for streaming. */
-       if (stream->net_seq_idx == (uint64_t) -1ULL) {
+       /*
+        * Don't create anything if this is set for streaming or should not be
+        * monitored.
+        */
+       if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor) {
                ret = utils_create_stream_file(stream->chan->pathname, stream->name,
                                stream->chan->tracefile_size, stream->tracefile_count_current,
                                stream->uid, stream->gid);