UST periodical metadata flush

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

diff --git a/src/common/consumer.h b/src/common/consumer.h
index a3e1ec3535094f169042d1bd70dae73fc19d5f58..46387522ec50c8a9509077f88a06213ef8c7c22e 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -52,6 +52,7 @@ enum lttng_consumer_command {
        LTTNG_CONSUMER_PUSH_METADATA,
        LTTNG_CONSUMER_CLOSE_METADATA,
        LTTNG_CONSUMER_SETUP_METADATA,
+       LTTNG_CONSUMER_FLUSH_CHANNEL,
 };
 
 /* State of each fd in consumer */
@@ -88,6 +89,9 @@ struct stream_list {
        unsigned int count;
 };
 
+/* Stub. */
+struct consumer_metadata_cache;
+
 struct lttng_consumer_channel {
        /* HT node used for consumer_data.channel_ht */
        struct lttng_ht_node_u64 node;
@@ -131,11 +135,17 @@ struct lttng_consumer_channel {
         * regular channel, this is always set to NULL.
         */
        struct lttng_consumer_stream *metadata_stream;
-       /*
-        * Metadata written so far. Helps keeping track of
-        * contiguousness and order.
-        */
-       uint64_t contig_metadata_written;
+
+       /* for UST */
+       int wait_fd;
+       /* Node within channel thread ht */
+       struct lttng_ht_node_u64 wait_fd_node;
+
+       /* Metadata cache is metadata channel */
+       struct consumer_metadata_cache *metadata_cache;
+       /* For metadata periodical flush */
+       int switch_timer_enabled;
+       timer_t switch_timer;
 };
 
 /*
@@ -145,6 +155,8 @@ struct lttng_consumer_channel {
 struct lttng_consumer_stream {
        /* HT node used by the data_ht and metadata_ht */
        struct lttng_ht_node_u64 node;
+       /* stream indexed per channel key node */
+       struct lttng_ht_node_u64 node_channel_id;
        /* HT node used in consumer_data.stream_list_ht */
        struct lttng_ht_node_u64 node_session_id;
        /* Pointer to associated channel. */
@@ -314,12 +326,16 @@ struct lttng_consumer_local_data {
         *    < 0 (error)
         */
        int (*on_update_stream)(int sessiond_key, uint32_t state);
+       enum lttng_consumer_type type;
        /* socket to communicate errors with sessiond */
        int consumer_error_socket;
+       /* socket to ask metadata to sessiond */
+       int consumer_metadata_socket;
        /* socket to exchange commands with sessiond */
        char *consumer_command_sock_path;
        /* communication with splice */
        int consumer_thread_pipe[2];
+       int consumer_channel_pipe[2];
        int consumer_splice_metadata_pipe[2];
        /* Data stream poll thread pipe. To transfer data stream to the thread */
        int consumer_data_pipe[2];
@@ -372,6 +388,11 @@ struct lttng_consumer_global_data {
         * This HT uses the "node_session_id" of the consumer stream.
         */
        struct lttng_ht *stream_list_ht;
+
+       /*
+        * This HT uses the "node_channel_id" of the consumer stream.
+        */
+       struct lttng_ht *stream_per_chan_id_ht;
 };
 
 /*
@@ -444,7 +465,8 @@ void consumer_del_stream(struct lttng_consumer_stream *stream,
                struct lttng_ht *ht);
 void consumer_del_metadata_stream(struct lttng_consumer_stream *stream,
                struct lttng_ht *ht);
-int consumer_add_channel(struct lttng_consumer_channel *channel);
+int consumer_add_channel(struct lttng_consumer_channel *channel,
+               struct lttng_consumer_local_data *ctx);
 void consumer_del_channel(struct lttng_consumer_channel *channel);
 
 /* lttng-relayd consumer command */
@@ -478,6 +500,7 @@ int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream,
 void *consumer_thread_metadata_poll(void *data);
 void *consumer_thread_data_poll(void *data);
 void *consumer_thread_sessiond_poll(void *data);
+void *consumer_thread_channel_poll(void *data);
 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                int sock, struct pollfd *consumer_sockpoll);