#include <urcu/list.h>
#include "lttngerr.h"
-#include "ltt-sessiond.h"
#include "trace.h"
+/*
+ * get_kernel_channel_by_name
+ *
+ * Find the channel name for the given kernel session.
+ */
+struct ltt_kernel_channel *get_kernel_channel_by_name(
+ char *name, struct ltt_kernel_session *session)
+{
+ struct ltt_kernel_channel *chan;
+
+ if (session == NULL) {
+ ERR("Undefine session");
+ goto error;
+ }
+
+ cds_list_for_each_entry(chan, &session->channel_list.head, list) {
+ if (strcmp(name, chan->channel->name) == 0) {
+ DBG("Found channel by name %s", name);
+ return chan;
+ }
+ }
+
+error:
+ return NULL;
+}
+
+/*
+ * get_kernel_event_by_name
+ *
+ * Find the event name for the given channel.
+ */
+struct ltt_kernel_event *get_kernel_event_by_name(
+ char *name, struct ltt_kernel_channel *channel)
+{
+ struct ltt_kernel_event *ev;
+
+ if (channel == NULL) {
+ ERR("Undefine channel");
+ goto error;
+ }
+
+ cds_list_for_each_entry(ev, &channel->events_list.head, list) {
+ if (strcmp(name, ev->event->name) == 0) {
+ DBG("Found event by name %s for channel %s", name,
+ channel->channel->name);
+ return ev;
+ }
+ }
+
+error:
+ return NULL;
+}
+
/*
* trace_create_kernel_session
*
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan)
+struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan, char *path)
{
int ret;
struct ltt_kernel_channel *lkc;
lkc->fd = 0;
lkc->stream_count = 0;
+ lkc->enabled = 1;
/* Init linked list */
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
/* Set default trace output path */
- ret = asprintf(&lkc->pathname, "%s", DEFAULT_TRACE_OUTPUT);
+ ret = asprintf(&lkc->pathname, "%s", path);
if (ret < 0) {
perror("asprintf kernel create channel");
goto error;
/* Setting up a kernel event */
lke->fd = 0;
lke->event = attr;
+ lke->enabled = 1;
return lke;
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_metadata *trace_create_kernel_metadata(void)
+struct ltt_kernel_metadata *trace_create_kernel_metadata(char *path)
{
int ret;
struct ltt_kernel_metadata *lkm;
chan->attr.num_subbuf = DEFAULT_CHANNEL_SUBBUF_NUM;
chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
+ chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
/* Init metadata */
lkm->fd = 0;
lkm->conf = chan;
/* Set default metadata path */
- ret = asprintf(&lkm->pathname, "%s/metadata", DEFAULT_TRACE_OUTPUT);
+ ret = asprintf(&lkm->pathname, "%s/metadata", path);
if (ret < 0) {
perror("asprintf kernel metadata");
goto error;
DBG("[trace] Closing session fd %d", session->fd);
/* Close kernel fds */
close(session->fd);
- DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
- close(session->metadata_stream_fd);
+ if (session->metadata_stream_fd != 0) {
+ DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
+ close(session->metadata_stream_fd);
+ }
- trace_destroy_kernel_metadata(session->metadata);
+ if (session->metadata != NULL) {
+ trace_destroy_kernel_metadata(session->metadata);
+ }
cds_list_for_each_entry(channel, &session->channel_list.head, list) {
trace_destroy_kernel_channel(channel);