Fix: define _LGPL_SOURCE in C files

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

diff --git a/src/bin/lttng-sessiond/kernel-consumer.c b/src/bin/lttng-sessiond/kernel-consumer.c
index 70759fb36d90149d8964967d3b20608c60bcc9ff..f634cd362a74fd810622d8d49c28397c137b4a27 100644 (file)
--- a/src/bin/lttng-sessiond/kernel-consumer.c
+++ b/src/bin/lttng-sessiond/kernel-consumer.c
@@ -16,6 +16,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -105,7 +106,7 @@ int kernel_consumer_add_channel(struct consumer_socket *sock,
                }
        } else {
                /* Empty path. */
-               pathname = "";
+               pathname = strdup("");
        }
 
        /* Prep channel message structure */
@@ -136,6 +137,7 @@ int kernel_consumer_add_channel(struct consumer_socket *sock,
        health_code_update();
 
 error:
+       free(pathname);
        return ret;
 }
 
@@ -168,7 +170,7 @@ int kernel_consumer_add_metadata(struct consumer_socket *sock,
                }
        } else {
                /* Empty path. */
-               pathname = "";
+               pathname = strdup("");
        }
 
        /* Prep channel message structure */
@@ -215,6 +217,7 @@ int kernel_consumer_add_metadata(struct consumer_socket *sock,
        health_code_update();
 
 error:
+       free(pathname);
        return ret;
 }
 
@@ -262,6 +265,40 @@ error:
        return ret;
 }
 
+/*
+ * Sending the notification that all streams were sent with STREAMS_SENT.
+ */
+int kernel_consumer_streams_sent(struct consumer_socket *sock,
+               struct ltt_kernel_session *session, uint64_t channel_key)
+{
+       int ret;
+       struct lttcomm_consumer_msg lkm;
+       struct consumer_output *consumer;
+
+       assert(sock);
+       assert(session);
+
+       DBG("Sending streams_sent");
+       /* Get consumer output pointer */
+       consumer = session->consumer;
+
+       /* Prep stream consumer message */
+       consumer_init_streams_sent_comm_msg(&lkm,
+                       LTTNG_CONSUMER_STREAMS_SENT,
+                       channel_key, consumer->net_seq_index);
+
+       health_code_update();
+
+       /* Send stream and file descriptor */
+       ret = consumer_send_msg(sock, &lkm);
+       if (ret < 0) {
+               goto error;
+       }
+
+error:
+       return ret;
+}
+
 /*
  * Send all stream fds of kernel channel to the consumer.
  */
@@ -337,14 +374,11 @@ int kernel_consumer_send_session(struct consumer_socket *sock,
 
        DBG("Sending session stream to kernel consumer");
 
-       if (session->metadata_stream_fd >= 0) {
+       if (session->metadata_stream_fd >= 0 && session->metadata) {
                ret = kernel_consumer_add_metadata(sock, session, monitor);
                if (ret < 0) {
                        goto error;
                }
-
-               /* Flag that at least the metadata has been sent to the consumer. */
-               session->consumer_fds_sent = 1;
        }
 
        /* Send channel and streams of it */
@@ -354,10 +388,21 @@ int kernel_consumer_send_session(struct consumer_socket *sock,
                if (ret < 0) {
                        goto error;
                }
+               if (monitor) {
+                       /*
+                        * Inform the relay that all the streams for the
+                        * channel were sent.
+                        */
+                       ret = kernel_consumer_streams_sent(sock, session, chan->fd);
+                       if (ret < 0) {
+                               goto error;
+                       }
+               }
        }
 
        DBG("Kernel consumer FDs of metadata and channel streams sent");
 
+       session->consumer_fds_sent = 1;
        return 0;
 
 error:
@@ -375,6 +420,7 @@ int kernel_consumer_destroy_channel(struct consumer_socket *socket,
 
        DBG("Sending kernel consumer destroy channel key %d", channel->fd);
 
+       memset(&msg, 0, sizeof(msg));
        msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
        msg.u.destroy_channel.key = channel->fd;
 
@@ -403,6 +449,7 @@ int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
 
        DBG("Sending kernel consumer destroy channel key %d", metadata->fd);
 
+       memset(&msg, 0, sizeof(msg));
        msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
        msg.u.destroy_channel.key = metadata->fd;