Don't allow enable/disable on metadata channel/events

[lttng-modules.git] / ltt-events.c

diff --git a/ltt-events.c b/ltt-events.c
index a94e8f9a1dde6a6e315133e59c66e3659455f99d..42d486c195d73c8cdfd265b6a54a5d2bd20950ec 100644 (file)
--- a/ltt-events.c
+++ b/ltt-events.c
@@ -139,6 +139,8 @@ int ltt_channel_enable(struct ltt_channel *channel)
 {
        int old;
 
+       if (channel == channel->session->metadata)
+               return -EPERM;
        old = xchg(&channel->enabled, 1);
        if (old)
                return -EEXIST;
@@ -149,6 +151,8 @@ int ltt_channel_disable(struct ltt_channel *channel)
 {
        int old;
 
+       if (channel == channel->session->metadata)
+               return -EPERM;
        old = xchg(&channel->enabled, 0);
        if (!old)
                return -EEXIST;
@@ -159,6 +163,8 @@ int ltt_event_enable(struct ltt_event *event)
 {
        int old;
 
+       if (event->chan == event->chan->session->metadata)
+               return -EPERM;
        old = xchg(&event->enabled, 1);
        if (old)
                return -EEXIST;
@@ -169,6 +175,8 @@ int ltt_event_disable(struct ltt_event *event)
 {
        int old;
 
+       if (event->chan == event->chan->session->metadata)
+               return -EPERM;
        old = xchg(&event->enabled, 0);
        if (!old)
                return -EEXIST;