kernctl commands to extract the stream instance id

[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.c

diff --git a/src/common/kernel-ctl/kernel-ctl.c b/src/common/kernel-ctl/kernel-ctl.c
index 28ed06cbdaa50b5494c698b296e1bc576cdcfd6c..dd228773bc655eb985e88a6b2fe20e8c87221115 100644 (file)
--- a/src/common/kernel-ctl/kernel-ctl.c
+++ b/src/common/kernel-ctl/kernel-ctl.c
@@ -16,7 +16,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
 #define _LGPL_SOURCE
 #define __USE_LINUX_IOCTL_DEFS
 #include <sys/ioctl.h>
@@ -112,6 +111,7 @@ int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
 {
        struct lttng_kernel_channel channel;
 
+       memset(&channel, 0, sizeof(channel));
        if (lttng_kernel_use_old_abi) {
                struct lttng_kernel_old_channel old_channel;
 
@@ -532,3 +532,15 @@ int kernctl_get_current_timestamp(int fd, uint64_t *ts)
 {
        return ioctl(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts);
 }
+
+/* Returns the packet sequence number of the current sub-buffer. */
+int kernctl_get_sequence_number(int fd, uint64_t *seq)
+{
+       return ioctl(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq);
+}
+
+/* Returns the stream instance id. */
+int kernctl_get_instance_id(int fd, uint64_t *id)
+{
+       return ioctl(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id);
+}