* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <errno.h>
#include <fcntl.h>
DBG("Adding context to channel %s", chan->channel->name);
ret = kernctl_add_context(chan->fd, &ctx->ctx);
if (ret < 0) {
- if (errno != EEXIST) {
- PERROR("add context ioctl");
- } else {
+ switch (errno) {
+ case ENOSYS:
+ /* Exists but not available for this kernel */
+ ret = LTTNG_ERR_KERN_CONTEXT_UNAVAILABLE;
+ goto error;
+ case EEXIST:
/* If EEXIST, we just ignore the error */
ret = 0;
+ goto end;
+ default:
+ PERROR("add context ioctl");
+ ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
+ goto error;
}
- goto error;
}
+end:
cds_list_add_tail(&ctx->list, &chan->ctx_list);
-
return 0;
error:
assert(ev);
assert(channel);
+ /* We pass ownership of filter_expression and filter */
event = trace_kernel_create_event(ev, filter_expression,
filter);
if (event == NULL) {
int kernel_track_pid(struct ltt_kernel_session *session, int pid)
{
+ int ret;
+
DBG("Kernel track PID %d for session id %" PRIu64 ".",
pid, session->id);
- return kernctl_track_pid(session->fd, pid);
+ ret = kernctl_track_pid(session->fd, pid);
+ if (!ret) {
+ return LTTNG_OK;
+ }
+ switch (errno) {
+ case EINVAL:
+ return LTTNG_ERR_INVALID;
+ case ENOMEM:
+ return LTTNG_ERR_NOMEM;
+ case EEXIST:
+ return LTTNG_ERR_PID_TRACKED;
+ default:
+ return LTTNG_ERR_UNK;
+ }
}
int kernel_untrack_pid(struct ltt_kernel_session *session, int pid)
{
+ int ret;
+
DBG("Kernel untrack PID %d for session id %" PRIu64 ".",
pid, session->id);
- return kernctl_untrack_pid(session->fd, pid);
+ ret = kernctl_untrack_pid(session->fd, pid);
+ if (!ret) {
+ return LTTNG_OK;
+ }
+ switch (errno) {
+ case EINVAL:
+ return LTTNG_ERR_INVALID;
+ case ENOMEM:
+ return LTTNG_ERR_NOMEM;
+ case ENOENT:
+ return LTTNG_ERR_PID_NOT_TRACKED;
+ default:
+ return LTTNG_ERR_UNK;
+ }
}
ssize_t kernel_list_tracker_pids(struct ltt_kernel_session *session,