- {
- struct ltt_kernel_session *ksess;
- struct ltt_kernel_channel *kchan;
-
- ksess = session->kernel_session;
-
- /*
- * If a non-default channel has been created in the
- * session, explicitely require that -c chan_name needs
- * to be provided.
- */
- if (ksess->has_non_default_channel && channel_name[0] == '\0') {
- ret = LTTNG_ERR_NEED_CHANNEL_NAME;
- goto error;
- }
-
- kchan = trace_kernel_get_channel_by_name(channel_name, ksess);
- if (kchan == NULL) {
- ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
- goto error;
- }
-
- ret = event_kernel_disable_all(kchan);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
- kernel_wait_quiescent(kernel_tracer_fd);
- break;
- }
- case LTTNG_DOMAIN_UST:
- {
- struct ltt_ust_session *usess;
- struct ltt_ust_channel *uchan;
-
- usess = session->ust_session;
-
- /*
- * If a non-default channel has been created in the
- * session, explicitely require that -c chan_name needs
- * to be provided.
- */
- if (usess->has_non_default_channel && channel_name[0] == '\0') {
- ret = LTTNG_ERR_NEED_CHANNEL_NAME;
- goto error;
- }
-
- uchan = trace_ust_find_channel_by_name(usess->domain_global.channels,
- channel_name);
- if (uchan == NULL) {
- ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto error;
- }
-
- ret = event_ust_disable_all_tracepoints(usess, uchan);
- if (ret != 0) {
- goto error;
- }
-
- DBG3("Disable all UST events in channel %s completed", channel_name);
-
- break;
- }
-#if 0
- case LTTNG_DOMAIN_UST_EXEC_NAME:
- case LTTNG_DOMAIN_UST_PID:
- case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN:
-#endif
- default:
- ret = LTTNG_ERR_UND;
- goto error;
- }
-
- ret = LTTNG_OK;
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Command LTTNG_ADD_CONTEXT processed by the client thread.
- */
-int cmd_add_context(struct ltt_session *session, int domain,
- char *channel_name, struct lttng_event_context *ctx, int kwpipe)
-{
- int ret, chan_kern_created = 0, chan_ust_created = 0;
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- assert(session->kernel_session);