X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel.c;h=381b83e6366c120128d9e6a639a081a24c54b684;hb=f5436bfcf6797b979b308a9af782750f9d079686;hp=45d958546f2cae75d938a8960af3c3fd5690be64;hpb=00a620843422e5c972aee0ada2181b811fc81b92;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index 45d958546..381b83e63 100644
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -187,6 +187,7 @@ int kernel_create_event(struct lttng_event *ev,
 	assert(ev);
 	assert(channel);
 
+	/* We pass ownership of filter_expression and filter */
 	event = trace_kernel_create_event(ev, filter_expression,
 			filter);
 	if (event == NULL) {
@@ -378,16 +379,46 @@ error:
 
 int kernel_track_pid(struct ltt_kernel_session *session, int pid)
 {
+	int ret;
+
 	DBG("Kernel track PID %d for session id %" PRIu64 ".",
 			pid, session->id);
-	return kernctl_track_pid(session->fd, pid);
+	ret = kernctl_track_pid(session->fd, pid);
+	if (!ret) {
+		return LTTNG_OK;
+	}
+	switch (errno) {
+	case EINVAL:
+		return LTTNG_ERR_INVALID;
+	case ENOMEM:
+		return LTTNG_ERR_NOMEM;
+	case EEXIST:
+		return LTTNG_ERR_PID_TRACKED;
+	default:
+		return LTTNG_ERR_UNK;
+	}
 }
 
 int kernel_untrack_pid(struct ltt_kernel_session *session, int pid)
 {
+	int ret;
+
 	DBG("Kernel untrack PID %d for session id %" PRIu64 ".",
 			pid, session->id);
-	return kernctl_untrack_pid(session->fd, pid);
+	ret = kernctl_untrack_pid(session->fd, pid);
+	if (!ret) {
+		return LTTNG_OK;
+	}
+	switch (errno) {
+	case EINVAL:
+		return LTTNG_ERR_INVALID;
+	case ENOMEM:
+		return LTTNG_ERR_NOMEM;
+	case ENOENT:
+		return LTTNG_ERR_PID_NOT_TRACKED;
+	default:
+		return LTTNG_ERR_UNK;
+	}
 }
 
 ssize_t kernel_list_tracker_pids(struct ltt_kernel_session *session,