Fix: free metadata cache after grace period in consumer

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

diff --git a/src/common/consumer.h b/src/common/consumer.h
index 4ac823c017d03754ed545a9a1288df707b84778f..ac3b4903f6b8c3e945432b35a471100a8998aede 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -206,6 +206,11 @@ struct lttng_consumer_channel {
 
        /* Timer value in usec for live streaming. */
        unsigned int live_timer_interval;
+
+       int *stream_fds;
+       int nr_stream_fds;
+       char root_shm_path[PATH_MAX];
+       char shm_path[PATH_MAX];
 };
 
 /*
@@ -237,6 +242,21 @@ struct lttng_consumer_stream {
        int shm_fd_is_copy;
        int data_read;
        int hangup_flush_done;
+
+       /*
+        * metadata_timer_lock protects flags waiting_on_metadata and
+        * missed_metadata_flush.
+        */
+       pthread_mutex_t metadata_timer_lock;
+       /*
+        * Flag set when awaiting metadata to be pushed. Used in the
+        * timer thread to skip waiting on the stream (and stream lock) to
+        * ensure we can proceed to flushing metadata in live mode.
+        */
+       bool waiting_on_metadata;
+       /* Raised when a timer misses a metadata flush. */
+       bool missed_metadata_flush;
+
        enum lttng_event_output output;
        /* Maximum subbuffer size. */
        unsigned long max_sb_size;
@@ -336,6 +356,11 @@ struct lttng_consumer_stream {
         */
        int index_fd;
 
+       /*
+        * Local pipe to extract data when using splice.
+        */
+       int splice_pipe[2];
+
        /*
         * Rendez-vous point between data and metadata stream in live mode.
         */
@@ -451,9 +476,7 @@ struct lttng_consumer_local_data {
        /* 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 */
        struct lttng_pipe *consumer_data_pipe;
 
@@ -596,7 +619,9 @@ struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key,
                uint64_t tracefile_count,
                uint64_t session_id_per_pid,
                unsigned int monitor,
-               unsigned int live_timer_interval);
+               unsigned int live_timer_interval,
+               const char *root_shm_path,
+               const char *shm_path);
 void consumer_del_stream(struct lttng_consumer_stream *stream,
                struct lttng_ht *ht);
 void consumer_del_metadata_stream(struct lttng_consumer_stream *stream,
@@ -663,8 +688,9 @@ int consumer_send_status_channel(int sock,
 void notify_thread_del_channel(struct lttng_consumer_local_data *ctx,
                uint64_t key);
 void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd);
-unsigned long consumer_get_consumed_maxsize(unsigned long consumed_pos,
-               unsigned long produced_pos, uint64_t max_stream_size);
+unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos,
+               unsigned long produced_pos, uint64_t nb_packets_per_stream,
+               uint64_t max_sb_size);
 int consumer_add_data_stream(struct lttng_consumer_stream *stream);
 void consumer_del_stream_for_data(struct lttng_consumer_stream *stream);
 int consumer_add_metadata_stream(struct lttng_consumer_stream *stream);