Add channel output method selection

[lttng-tools.git] / ltt-sessiond / trace.c

diff --git a/ltt-sessiond/trace.c b/ltt-sessiond/trace.c
index e0051cd1cabe0e7d50bd783c4b4a48d67429e925..8b7be9215eeef9d3d8625e66e38bde3e5ccdbe23 100644 (file)
--- a/ltt-sessiond/trace.c
+++ b/ltt-sessiond/trace.c
@@ -27,6 +27,59 @@
 #include "ltt-sessiond.h"
 #include "trace.h"
 
+/*
+ *  get_kernel_channel_by_name
+ *
+ *  Find the channel name for the given kernel session.
+ */
+struct ltt_kernel_channel *get_kernel_channel_by_name(
+               char *name, struct ltt_kernel_session *session)
+{
+       struct ltt_kernel_channel *chan;
+
+       if (session == NULL) {
+               ERR("Undefine session");
+               goto error;
+       }
+
+       cds_list_for_each_entry(chan, &session->channel_list.head, list) {
+               if (strcmp(name, chan->channel->name) == 0) {
+                       DBG("Found channel by name %s", name);
+                       return chan;
+               }
+       }
+
+error:
+       return NULL;
+}
+
+/*
+ *  get_kernel_event_by_name
+ *
+ *  Find the event name for the given channel.
+ */
+struct ltt_kernel_event *get_kernel_event_by_name(
+               char *name, struct ltt_kernel_channel *channel)
+{
+       struct ltt_kernel_event *ev;
+
+       if (channel == NULL) {
+               ERR("Undefine channel");
+               goto error;
+       }
+
+       cds_list_for_each_entry(ev, &channel->events_list.head, list) {
+               if (strcmp(name, ev->event->name) == 0) {
+                       DBG("Found event by name %s for channel %s", name,
+                                       channel->channel->name);
+                       return ev;
+               }
+       }
+
+error:
+       return NULL;
+}
+
 /*
  *  trace_create_kernel_session
  *
@@ -86,6 +139,7 @@ struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *cha
 
        lkc->fd = 0;
        lkc->stream_count = 0;
+       lkc->enabled = 1;
        /* Init linked list */
        CDS_INIT_LIST_HEAD(&lkc->events_list.head);
        CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
@@ -148,6 +202,7 @@ struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev)
        /* Setting up a kernel event */
        lke->fd = 0;
        lke->event = attr;
+       lke->enabled = 1;
 
        return lke;
 
@@ -181,6 +236,7 @@ struct ltt_kernel_metadata *trace_create_kernel_metadata(void)
        chan->attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
        chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
        chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
+       chan->attr.output = DEFAULT_CHANNEL_OUTPUT;
 
        /* Init metadata */
        lkm->fd = 0;
@@ -302,7 +358,9 @@ void trace_destroy_kernel_session(struct ltt_kernel_session *session)
                close(session->metadata_stream_fd);
        }
 
-       trace_destroy_kernel_metadata(session->metadata);
+       if (session->metadata != NULL) {
+               trace_destroy_kernel_metadata(session->metadata);
+       }
 
        cds_list_for_each_entry(channel, &session->channel_list.head, list) {
                trace_destroy_kernel_channel(channel);