Add kernel snapshot support

[lttng-tools.git] / src / common / consumer.h

diff --git a/src/common/consumer.h b/src/common/consumer.h
index bf87609f3f1aea428128895cdab7ba20cf1f8568..f804b7260ce7e6d013eb55ff36c90487930562e3 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -54,6 +54,8 @@ enum lttng_consumer_command {
        LTTNG_CONSUMER_CLOSE_METADATA,
        LTTNG_CONSUMER_SETUP_METADATA,
        LTTNG_CONSUMER_FLUSH_CHANNEL,
+       LTTNG_CONSUMER_SNAPSHOT_CHANNEL,
+       LTTNG_CONSUMER_SNAPSHOT_METADATA,
 };
 
 /* State of each fd in consumer */
@@ -85,6 +87,8 @@ enum consumer_channel_type {
        CONSUMER_CHANNEL_TYPE_DATA      = 1,
 };
 
+extern struct lttng_consumer_global_data consumer_data;
+
 struct stream_list {
        struct cds_list_head head;
        unsigned int count;
@@ -130,6 +134,13 @@ struct lttng_consumer_channel {
         * LTTNG_CONSUMER_GET_CHANNEL.
         */
        struct stream_list streams;
+
+       /*
+        * List of streams in no monitor mode for this channel. Used ONLY for
+        * snapshots recording.
+        */
+       struct stream_list stream_no_monitor_list;
+
        /*
         * Set if the channel is metadata. We keep a reference to the stream
         * because we have to flush data once pushed by the session daemon. For a
@@ -152,6 +163,12 @@ struct lttng_consumer_channel {
        /* On-disk circular buffer */
        uint64_t tracefile_size;
        uint64_t tracefile_count;
+       /*
+        * Monitor or not the streams of this channel meaning this indicates if the
+        * streams should be sent to the data/metadata thread or added to the no
+        * monitor list of the channel.
+        */
+       unsigned int monitor;
 };
 
 /*
@@ -243,6 +260,9 @@ struct lttng_consumer_stream {
        /* On-disk circular buffer */
        uint64_t tracefile_size_current;
        uint64_t tracefile_count_current;
+
+       /* Node for the no monitor stream list in a channel. */
+       struct cds_list_head no_monitor_node;
 };
 
 /*
@@ -458,7 +478,7 @@ struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key,
                const char *channel_name,
                uid_t uid,
                gid_t gid,
-               int relayd_id,
+               uint64_t relayd_id,
                uint64_t session_id,
                int cpu,
                int *alloc_ret,
@@ -469,10 +489,11 @@ struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key,
                const char *name,
                uid_t uid,
                gid_t gid,
-               int relayd_id,
+               uint64_t relayd_id,
                enum lttng_event_output output,
                uint64_t tracefile_size,
-               uint64_t tracefile_count);
+               uint64_t tracefile_count,
+               unsigned int monitor);
 void consumer_del_stream(struct lttng_consumer_stream *stream,
                struct lttng_ht *ht);
 void consumer_del_metadata_stream(struct lttng_consumer_stream *stream,
@@ -531,5 +552,6 @@ int consumer_send_status_channel(int sock,
                struct lttng_consumer_channel *channel);
 void notify_thread_del_channel(struct lttng_consumer_local_data *ctx,
                uint64_t key);
+void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd);
 
 #endif /* LIB_CONSUMER_H */