{
int ret;
+ assert(chan);
+ assert(ctx);
+
DBG("Adding context to channel %s", chan->channel->name);
ret = kernctl_add_context(chan->fd, ctx);
if (ret < 0) {
int ret;
struct ltt_kernel_session *lks;
+ assert(session);
+
/* Allocate data structure */
- lks = trace_kernel_create_session(session->path);
+ lks = trace_kernel_create_session();
if (lks == NULL) {
ret = -1;
goto error;
* kernel session.
*/
int kernel_create_channel(struct ltt_kernel_session *session,
- struct lttng_channel *chan, char *path)
+ struct lttng_channel *chan)
{
int ret;
struct ltt_kernel_channel *lkc;
+ assert(session);
+ assert(chan);
+
/* Allocate kernel channel */
- lkc = trace_kernel_create_channel(chan, path);
+ lkc = trace_kernel_create_channel(chan);
if (lkc == NULL) {
goto error;
}
- DBG3("Kernel create channel %s in %s with attr: %d, %" PRIu64 ", %" PRIu64 ", %u, %u, %d",
- chan->name, path, lkc->channel->attr.overwrite,
+ DBG3("Kernel create channel %s with attr: %d, %" PRIu64 ", %" PRIu64 ", %u, %u, %d",
+ chan->name, lkc->channel->attr.overwrite,
lkc->channel->attr.subbuf_size, lkc->channel->attr.num_subbuf,
lkc->channel->attr.switch_timer_interval, lkc->channel->attr.read_timer_interval,
lkc->channel->attr.output);
/* Add channel to session */
cds_list_add(&lkc->list, &session->channel_list.head);
session->channel_count++;
+ lkc->session = session;
DBG("Kernel channel %s created (fd: %d)", lkc->channel->name, lkc->fd);
int ret;
struct ltt_kernel_event *event;
+ assert(ev);
+ assert(channel);
+
event = trace_kernel_create_event(ev);
if (event == NULL) {
ret = -1;
{
int ret;
+ assert(chan);
+
ret = kernctl_disable(chan->fd);
if (ret < 0) {
PERROR("disable chan ioctl");
{
int ret;
+ assert(chan);
+
ret = kernctl_enable(chan->fd);
if (ret < 0 && errno != EEXIST) {
PERROR("Enable kernel chan");
{
int ret;
+ assert(event);
+
ret = kernctl_enable(event->fd);
if (ret < 0) {
switch (errno) {
{
int ret;
+ assert(event);
+
ret = kernctl_disable(event->fd);
if (ret < 0) {
switch (errno) {
int ret;
struct ltt_kernel_metadata *lkm;
+ assert(session);
+
/* Allocate kernel metadata */
lkm = trace_kernel_create_metadata();
if (lkm == NULL) {
{
int ret;
+ assert(session);
+
ret = kernctl_start_session(session->fd);
if (ret < 0) {
PERROR("ioctl start session");
{
int ret;
+ assert(calibrate);
+
ret = kernctl_calibrate(fd, calibrate);
if (ret < 0) {
PERROR("calibrate ioctl");
int ret;
struct ltt_kernel_stream *stream;
+ assert(channel);
+
DBG("Flush buffer for channel %s", channel->channel->name);
cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
{
int ret;
+ assert(session);
+
ret = kernctl_stop_session(session->fd);
if (ret < 0) {
goto error;
int ret, count = 0;
struct ltt_kernel_stream *lks;
+ assert(channel);
+
while ((ret = kernctl_create_stream(channel->fd)) >= 0) {
lks = trace_kernel_create_stream(channel->channel->name, count);
if (lks == NULL) {
PERROR("fcntl session fd");
}
+ lks->tracefile_size = channel->channel->attr.tracefile_size;
+ lks->tracefile_count = channel->channel->attr.tracefile_count;
+
/* Add stream to channe stream list */
cds_list_add(&lks->list, &channel->stream_list.head);
channel->stream_count++;
{
int ret;
+ assert(session);
+
ret = kernctl_create_stream(session->metadata->fd);
if (ret < 0) {
PERROR("kernel create metadata stream");
FILE *fp;
struct lttng_event *elist;
+ assert(events);
+
fd = kernctl_tracepoint_list(tracer_fd);
if (fd < 0) {
PERROR("kernel tracepoint list");
trace_kernel_destroy_session(ksess);
}
+
+/*
+ * Destroy a kernel channel object. It does not do anything on the tracer side.
+ */
+void kernel_destroy_channel(struct ltt_kernel_channel *kchan)
+{
+ struct ltt_kernel_session *ksess = NULL;
+
+ assert(kchan);
+ assert(kchan->channel);
+
+ DBG3("Kernel destroy channel %s", kchan->channel->name);
+
+ /* Update channel count of associated session. */
+ if (kchan->session) {
+ /* Keep pointer reference so we can update it after the destroy. */
+ ksess = kchan->session;
+ }
+
+ trace_kernel_destroy_channel(kchan);
+
+ /*
+ * At this point the kernel channel is not visible anymore. This is safe
+ * since in order to work on a visible kernel session, the tracing session
+ * lock (ltt_session.lock) MUST be acquired.
+ */
+ if (ksess) {
+ ksess->channel_count--;
+ }
+}