Fix UST renaming and update ust headers

[lttng-tools.git] / ltt-sessiond / kernel-ctl.c

diff --git a/ltt-sessiond/kernel-ctl.c b/ltt-sessiond/kernel-ctl.c
index 3014620babe5ff4cea11ce1253eed43fa85d9862..203c01050e82199f34128d09b9c5dd95ca6fb0a4 100644 (file)
--- a/ltt-sessiond/kernel-ctl.c
+++ b/ltt-sessiond/kernel-ctl.c
@@ -122,7 +122,7 @@ int kernel_create_session(struct ltt_session *session, int tracer_fd)
                perror("fcntl session fd");
        }
 
-       lks->kconsumer_fds_sent = 0;
+       lks->consumer_fds_sent = 0;
        session->kernel_session = lks;
 
        DBG("Kernel session created (fd: %d)", lks->fd);
@@ -189,15 +189,28 @@ int kernel_create_event(struct lttng_event *ev,
 
        event = trace_kernel_create_event(ev);
        if (event == NULL) {
+               ret = -1;
                goto error;
        }
 
        ret = kernctl_create_event(channel->fd, event->event);
        if (ret < 0) {
-               perror("create event ioctl");
+               if (errno != EEXIST) {
+                       PERROR("create event ioctl");
+               }
+               ret = -errno;
                goto free_event;
        }
 
+       /*
+        * LTTNG_KERNEL_SYSCALL event creation will return 0 on success. However
+        * this FD must not be added to the event list.
+        */
+       if (ret == 0 && event->event->instrumentation == LTTNG_KERNEL_SYSCALL) {
+               DBG2("Kernel event syscall creation success");
+               goto end;
+       }
+
        event->fd = ret;
        /* Prevent fd duplication after execlp() */
        ret = fcntl(event->fd, F_SETFD, FD_CLOEXEC);
@@ -211,12 +224,13 @@ int kernel_create_event(struct lttng_event *ev,
 
        DBG("Event %s created (fd: %d)", ev->name, event->fd);
 
+end:
        return 0;
 
 free_event:
        free(event);
 error:
-       return -1;
+       return ret;
 }
 
 /*
@@ -250,9 +264,8 @@ int kernel_enable_channel(struct ltt_kernel_channel *chan)
        int ret;
 
        ret = kernctl_enable(chan->fd);
-       if (ret < 0) {
-               perror("enable chan ioctl");
-               ret = errno;
+       if (ret < 0 && errno != EEXIST) {
+               perror("Enable kernel chan");
                goto error;
        }
 
@@ -273,11 +286,8 @@ int kernel_enable_event(struct ltt_kernel_event *event)
        int ret;
 
        ret = kernctl_enable(event->fd);
-       if (ret < 0) {
-               perror("enable event ioctl");
-               if (errno == EEXIST) {
-                       ret = -EEXIST;
-               }
+       if (ret < 0 && errno != EEXIST) {
+               perror("enable kernel event");
                goto error;
        }
 
@@ -298,8 +308,8 @@ int kernel_disable_event(struct ltt_kernel_event *event)
        int ret;
 
        ret = kernctl_disable(event->fd);
-       if (ret < 0) {
-               perror("disable event ioctl");
+       if (ret < 0 && errno != EEXIST) {
+               perror("disable kernel event");
                goto error;
        }