Add kernel enable event support

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

diff --git a/ltt-sessiond/kernel-ctl.c b/ltt-sessiond/kernel-ctl.c
index 5d70296ea82008669c6710c57a19024c4620f051..02e87e3401b88d1e6f81b999dd71e6f81a2d4438 100644 (file)
--- a/ltt-sessiond/kernel-ctl.c
+++ b/ltt-sessiond/kernel-ctl.c
@@ -19,6 +19,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "ltt-sessiond.h"
 #include "libkernelctl.h"
@@ -101,3 +102,42 @@ int kernel_create_channel(struct command_ctx *cmd_ctx)
 error:
        return ret;
 }
+
+/*
+ *  kernel_enable_event
+ *
+ *  Enable kernel event.
+ */
+int kernel_enable_event(struct ltt_kernel_channel *channel, char *name)
+{
+       int ret;
+       struct ltt_kernel_event *event;
+       struct lttng_kernel_event *lke;
+
+       event = malloc(sizeof(struct ltt_kernel_event));
+       lke = malloc(sizeof(struct lttng_kernel_event));
+
+       if (event == NULL || lke == NULL) {
+               perror("kernel enable event malloc");
+               ret = -errno;
+               goto error;
+       }
+
+       /* Setting up a kernel event */
+       strncpy(lke->name, name, LTTNG_SYM_NAME_LEN);
+       lke->instrumentation = LTTNG_KERNEL_TRACEPOINTS;
+       event->event = lke;
+
+       ret = kernctl_create_event(channel->fd, lke);
+       if (ret < 0) {
+               goto error;
+       }
+
+       /* Add event to event list */
+       cds_list_add(&event->list, &channel->events_list.head);
+
+       return 0;
+
+error:
+       return ret;
+}