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 fcda59363dfb23019aa793dd244c400c044296de..4a7287b61ba78f46365b76ffc1fd011525d82064 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -563,6 +563,8 @@ struct consumer_output *consumer_copy_output(struct consumer_output *obj)
        output->net_seq_index = obj->net_seq_index;
        memcpy(output->subdir, obj->subdir, PATH_MAX);
        output->snapshot = obj->snapshot;
+       output->relay_major_version = obj->relay_major_version;
+       output->relay_minor_version = obj->relay_minor_version;
        memcpy(&output->dst, &obj->dst, sizeof(output->dst));
        ret = consumer_copy_sockets(output, obj);
        if (ret < 0) {
@@ -713,7 +715,10 @@ int consumer_set_network_uri(struct consumer_output *obj,
                        goto error;
                }
 
-               strncpy(obj->subdir, tmp_path, sizeof(obj->subdir));
+               if (lttng_strncpy(obj->subdir, tmp_path, sizeof(obj->subdir))) {
+                       ret = -LTTNG_ERR_INVALID;
+                       goto error;
+               }
                DBG3("Consumer set network uri subdir path %s", tmp_path);
        }
 
@@ -743,7 +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;
 }
@@ -801,6 +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,
@@ -832,6 +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;
@@ -887,7 +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);
 
@@ -908,6 +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));
@@ -1043,6 +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.
@@ -1084,7 +1121,11 @@ int consumer_set_subdir(struct consumer_output *consumer,
                goto error;
        }
 
-       strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir));
+       if (lttng_strncpy(consumer->subdir, tmp_path,
+                       sizeof(consumer->subdir))) {
+               ret = -EINVAL;
+               goto error;
+       }
        DBG2("Consumer subdir set to %s", consumer->subdir);
 
 error:
@@ -1182,6 +1223,38 @@ end:
        return ret;
 }
 
+/*
+ * Send a clear quiescent command to consumer using the given channel key.
+ *
+ * Return 0 on success else a negative value.
+ */
+int consumer_clear_quiescent_channel(struct consumer_socket *socket, uint64_t key)
+{
+       int ret;
+       struct lttcomm_consumer_msg msg;
+
+       assert(socket);
+
+       DBG2("Consumer clear quiescent channel key %" PRIu64, key);
+
+       memset(&msg, 0, sizeof(msg));
+       msg.cmd_type = LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL;
+       msg.u.clear_quiescent_channel.key = key;
+
+       pthread_mutex_lock(socket->lock);
+       health_code_update();
+
+       ret = consumer_send_msg(socket, &msg);
+       if (ret < 0) {
+               goto end;
+       }
+
+end:
+       health_code_update();
+       pthread_mutex_unlock(socket->lock);
+       return ret;
+}
+
 /*
  * Send a close metadata command to consumer using the given channel key.
  * Called with registry lock held.
@@ -1257,7 +1330,7 @@ end:
  */
 int consumer_push_metadata(struct consumer_socket *socket,
                uint64_t metadata_key, char *metadata_str, size_t len,
-               size_t target_offset)
+               size_t target_offset, uint64_t version)
 {
        int ret;
        struct lttcomm_consumer_msg msg;
@@ -1273,6 +1346,7 @@ int consumer_push_metadata(struct consumer_socket *socket,
        msg.u.push_metadata.key = metadata_key;
        msg.u.push_metadata.target_offset = target_offset;
        msg.u.push_metadata.len = len;
+       msg.u.push_metadata.version = version;
 
        health_code_update();
        ret = consumer_send_msg(socket, &msg);