Implement consumer ring buffer position sampling

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

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 6ee3975792bb061b46035d6d7b5923af1ab6fd0f..4a7287b61ba78f46365b76ffc1fd011525d82064 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -748,7 +748,6 @@ int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd)
        }
 
        ret = consumer_recv_status_reply(sock);
-
 error:
        return ret;
 }
@@ -806,6 +805,7 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                unsigned int switch_timer_interval,
                unsigned int read_timer_interval,
                unsigned int live_timer_interval,
+               unsigned int monitor_timer_interval,
                int output,
                int type,
                uint64_t session_id,
@@ -837,6 +837,7 @@ void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
        msg->u.ask_channel.switch_timer_interval = switch_timer_interval;
        msg->u.ask_channel.read_timer_interval = read_timer_interval;
        msg->u.ask_channel.live_timer_interval = live_timer_interval;
+       msg->u.ask_channel.monitor_timer_interval = monitor_timer_interval;
        msg->u.ask_channel.output = output;
        msg->u.ask_channel.type = type;
        msg->u.ask_channel.session_id = session_id;
@@ -892,7 +893,8 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                uint64_t tracefile_size,
                uint64_t tracefile_count,
                unsigned int monitor,
-               unsigned int live_timer_interval)
+               unsigned int live_timer_interval,
+               unsigned int monitor_timer_interval)
 {
        assert(msg);
 
@@ -913,6 +915,7 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
        msg->u.channel.tracefile_count = tracefile_count;
        msg->u.channel.monitor = monitor;
        msg->u.channel.live_timer_interval = live_timer_interval;
+       msg->u.channel.monitor_timer_interval = monitor_timer_interval;
 
        strncpy(msg->u.channel.pathname, pathname,
                        sizeof(msg->u.channel.pathname));
@@ -1048,6 +1051,35 @@ error:
        return ret;
 }
 
+int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
+               int pipe)
+{
+       int ret;
+       struct lttcomm_consumer_msg msg;
+
+       /* Code flow error. Safety net. */
+
+       memset(&msg, 0, sizeof(msg));
+       msg.cmd_type = LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE;
+
+       DBG3("Sending set_channel_monitor_pipe command to consumer");
+       ret = consumer_send_msg(consumer_sock, &msg);
+       if (ret < 0) {
+               goto error;
+       }
+
+       DBG3("Sending channel monitoring pipe %d to consumer on socket %d",
+                       pipe, *consumer_sock->fd_ptr);
+       ret = consumer_send_fds(consumer_sock, &pipe, 1);
+       if (ret < 0) {
+               goto error;
+       }
+
+       DBG2("Channel monitoring pipe successfully sent");
+error:
+       return ret;
+}
+
 /*
  * Set consumer subdirectory using the session name and a generated datetime if
  * needed. This is appended to the current subdirectory.