Add kernel snapshot support

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

diff --git a/src/bin/lttng-sessiond/kernel-consumer.c b/src/bin/lttng-sessiond/kernel-consumer.c
index ef6dccb538219c86b70615b5323c00697f5a510d..bf3559a21fa021a55e5cebeb7a582b72e80b87de 100644 (file)
--- a/src/bin/lttng-sessiond/kernel-consumer.c
+++ b/src/bin/lttng-sessiond/kernel-consumer.c
@@ -202,14 +202,6 @@ int kernel_consumer_add_metadata(struct consumer_socket *sock,
                        session->metadata_stream_fd,
                        0); /* CPU: 0 for metadata. */
 
-       /*
-        * Set the no monitor flag. If set to 1, it indicates the consumer to NOT
-        * monitor the stream but rather add it to a special list in the associated
-        * channel. This is used to handle ephemeral stream used by the snapshot
-        * command or store streams for the flight recorder mode.
-        */
-       lkm.u.stream.no_monitor = no_monitor;
-
        health_code_update();
 
        /* Send stream and file descriptor */
@@ -370,3 +362,61 @@ int kernel_consumer_send_session(struct consumer_socket *sock,
 error:
        return ret;
 }
+
+int kernel_consumer_destroy_channel(struct consumer_socket *socket,
+               struct ltt_kernel_channel *channel)
+{
+       int ret;
+       struct lttcomm_consumer_msg msg;
+
+       assert(channel);
+       assert(socket);
+       assert(socket->fd >= 0);
+
+       DBG("Sending kernel consumer destroy channel key %d", channel->fd);
+
+       msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+       msg.u.destroy_channel.key = channel->fd;
+
+       pthread_mutex_lock(socket->lock);
+       health_code_update();
+
+       ret = consumer_send_msg(socket, &msg);
+       if (ret < 0) {
+               goto error;
+       }
+
+error:
+       health_code_update();
+       pthread_mutex_unlock(socket->lock);
+       return ret;
+}
+
+int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
+               struct ltt_kernel_metadata *metadata)
+{
+       int ret;
+       struct lttcomm_consumer_msg msg;
+
+       assert(metadata);
+       assert(socket);
+       assert(socket->fd >= 0);
+
+       DBG("Sending kernel consumer destroy channel key %d", metadata->fd);
+
+       msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+       msg.u.destroy_channel.key = metadata->fd;
+
+       pthread_mutex_lock(socket->lock);
+       health_code_update();
+
+       ret = consumer_send_msg(socket, &msg);
+       if (ret < 0) {
+               goto error;
+       }
+
+error:
+       health_code_update();
+       pthread_mutex_unlock(socket->lock);
+       return ret;
+}