Support flight recorder mode for a session

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

diff --git a/src/common/consumer.h b/src/common/consumer.h
index 19a590e801e9739ff2aca138c5bf9cfe62417e30..9fadc5a06e9cc21743854829c57832550a11f958 100644 (file)
--- a/src/common/consumer.h
+++ b/src/common/consumer.h
@@ -31,6 +31,7 @@
 #include <common/compat/fcntl.h>
 #include <common/compat/uuid.h>
 #include <common/sessiond-comm/sessiond-comm.h>
+#include <common/pipe.h>
 
 /* Commands for consumer */
 enum lttng_consumer_command {
@@ -53,6 +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 */
@@ -84,6 +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;
@@ -146,9 +151,17 @@ struct lttng_consumer_channel {
        /* For metadata periodical flush */
        int switch_timer_enabled;
        timer_t switch_timer;
+       int switch_timer_error;
+
        /* 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;
 };
 
 /*
@@ -219,6 +232,7 @@ struct lttng_consumer_stream {
         * Lock to use the stream FDs since they are used between threads.
         *
         * This is nested INSIDE the consumer_data lock.
+        * This is nested INSIDE the metadata cache lock.
         * This is nested OUTSIDE consumer_relayd_sock_pair lock.
         */
        pthread_mutex_t lock;
@@ -344,11 +358,11 @@ struct lttng_consumer_local_data {
        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];
+       struct lttng_pipe *consumer_data_pipe;
        /* to let the signal handler wake up the fd receiver thread */
        int consumer_should_quit[2];
        /* Metadata poll thread pipe. Transfer metadata stream to it */
-       int consumer_metadata_pipe[2];
+       struct lttng_pipe *consumer_metadata_pipe;
 };
 
 /*
@@ -454,7 +468,7 @@ 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,
@@ -465,10 +479,11 @@ 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,
@@ -525,5 +540,8 @@ int consumer_data_pending(uint64_t id);
 int consumer_send_status_msg(int sock, int ret_code);
 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 */