Add enable kernel event using the enable ioctl

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

diff --git a/ltt-sessiond/trace.c b/ltt-sessiond/trace.c
index e0051cd1cabe0e7d50bd783c4b4a48d67429e925..eb7d0e152497569634e5fbf094d2a8d7170e9cbe 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
  *