* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+#define _GNU_SOURCE
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <unistd.h>
+#include "lttngerr.h"
#include "ltt-sessiond.h"
#include "libkernelctl.h"
#include "kernel-ctl.h"
*
* Create a new kernel session using the command context session.
*/
-int kernel_create_session(struct command_ctx *cmd_ctx, int tracer_fd)
+int kernel_create_session(struct ltt_session *session, int tracer_fd)
{
int ret;
struct ltt_kernel_session *lks;
/* Assigning session fd and to the command context */
lks->fd = ret;
- cmd_ctx->session->kernel_session = lks;
- cmd_ctx->session->kern_session_count++;
+ lks->channel_count = 0;
+ lks->stream_count_global = 0;
+ session->kernel_session = lks;
+ session->kern_session_count++;
+ CDS_INIT_LIST_HEAD(&lks->channel_list.head);
+
+ DBG("Kernel session created (fd: %d)", lks->fd);
return 0;
*
* Create a kernel channel within the kernel session.
*/
-int kernel_create_channel(struct command_ctx *cmd_ctx)
+int kernel_create_channel(struct ltt_kernel_session *session)
{
int ret;
struct ltt_kernel_channel *lkc;
chan->switch_timer_interval = DEFAULT_KERNEL_SWITCH_TIMER;
chan->read_timer_interval = DEFAULT_KERNEL_READ_TIMER;
- ret = kernctl_create_channel(cmd_ctx->session->kernel_session->fd, chan);
+ ret = kernctl_create_channel(session->fd, chan);
if (ret < 0) {
perror("ioctl create channel");
goto error;
}
+ /* Setup the channel */
lkc->fd = ret;
lkc->channel = chan;
+ lkc->stream_count = 0;
+ ret = asprintf(&lkc->pathname, "%s", DEFAULT_TRACE_OUTPUT);
+ if (ret < 0) {
+ perror("asprintf kernel create channel");
+ goto error;
+ }
+
+ DBG("Channel path set to %s", lkc->pathname);
+
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
+ CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
+ cds_list_add(&lkc->list, &session->channel_list.head);
+ session->channel_count++;
- cmd_ctx->session->kernel_session->channel = lkc;
+ DBG("Kernel channel created (fd: %d)", lkc->fd);
return 0;
*
* Enable kernel event.
*/
-int kernel_enable_event(struct ltt_kernel_channel *channel, char *name)
+int kernel_enable_event(struct ltt_kernel_session *session, char *name)
{
int ret;
+ struct ltt_kernel_channel *chan;
struct ltt_kernel_event *event;
struct lttng_kernel_event *lke;
lke->instrumentation = LTTNG_KERNEL_TRACEPOINTS;
event->event = lke;
- ret = kernctl_create_event(channel->fd, lke);
- if (ret < 0) {
- goto error;
- }
+ cds_list_for_each_entry(chan, &session->channel_list.head, list) {
+ ret = kernctl_create_event(chan->fd, lke);
+ if (ret < 0) {
+ goto error;
+ }
- /* Add event to event list */
- cds_list_add(&event->list, &channel->events_list.head);
+ event->fd = ret;
+ /* Add event to event list */
+ cds_list_add(&event->list, &chan->events_list.head);
+ DBG("Event %s enabled (fd: %d)", name, event->fd);
+ }
return 0;
goto error;
}
+ lkm->fd = ret;
+ lkm->conf = conf;
+ ret = asprintf(&lkm->pathname, "%s/metadata", DEFAULT_TRACE_OUTPUT);
+ if (ret < 0) {
+ perror("asprintf kernel metadata");
+ goto error;
+ }
session->metadata = lkm;
- session->metadata->fd = ret;
- session->metadata->conf = conf;
+
+ DBG("Kernel metadata opened (fd: %d)", lkm->fd);
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_start_session
+ *
+ * Start tracing session.
+ */
+int kernel_start_session(struct ltt_kernel_session *session)
+{
+ int ret;
+
+ ret = kernctl_start_session(session->fd);
+ if (ret < 0) {
+ goto error;
+ }
+
+ DBG("Kernel session started");
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_stop_session
+ *
+ * Stop tracing session.
+ */
+int kernel_stop_session(struct ltt_kernel_session *session)
+{
+ int ret;
+
+ ret = kernctl_stop_session(session->fd);
+ if (ret < 0) {
+ goto error;
+ }
+
+ DBG("Kernel session stopped");
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_create_channel_stream
+ *
+ * Create a stream for a channel.
+ *
+ * Return the number of created stream. Else, a negative value.
+ */
+int kernel_create_channel_stream(struct ltt_kernel_channel *channel)
+{
+ int ret;
+ struct ltt_kernel_stream *lks;
+
+ while ((ret = kernctl_create_stream(channel->fd)) > 0) {
+ lks = malloc(sizeof(struct ltt_kernel_stream));
+ if (lks == NULL) {
+ perror("kernel create stream malloc");
+ ret = -errno;
+ goto error;
+ }
+
+ lks->fd = ret;
+ ret = asprintf(&lks->pathname, "%s/trace_%d",
+ channel->pathname, channel->stream_count);
+ if (ret < 0) {
+ perror("asprintf kernel create stream");
+ goto error;
+ }
+ lks->state = 0;
+
+ cds_list_add(&lks->list, &channel->stream_list.head);
+ channel->stream_count++;
+ }
+
+ DBG("Kernel channel stream created (num: %d)", channel->stream_count);
+
+ return channel->stream_count;
+
+error:
+ return ret;
+}
+
+/*
+ * kernel_create_metadata_stream
+ *
+ * Create the metadata stream.
+ */
+int kernel_create_metadata_stream(struct ltt_kernel_session *session)
+{
+ int ret;
+
+ ret = kernctl_create_stream(session->metadata->fd);
+ if (ret < 0) {
+ perror("kernel create metadata stream");
+ ret = -errno;
+ goto error;
+ }
+
+ DBG("Kernel metadata stream created (fd: %d)", ret);
+ session->metadata_stream_fd = ret;
return 0;
projects / lttng-tools.git / blobdiff