+ }
+
+#ifdef DISABLED
+ /* Connect to ust apps if available pid */
+ if (cmd_ctx->lsm->pid > 0) {
+ /* Connect to app using ustctl API */
+ cmd_ctx->ust_sock = ust_connect_app(cmd_ctx->lsm->pid);
+ if (cmd_ctx->ust_sock < 0) {
+ ret = LTTCOMM_NO_TRACEABLE;
+ goto error;
+ }
+ }
+#endif /* DISABLED */
+
+ /* Process by command type */
+ switch (cmd_ctx->lsm->cmd_type) {
+ case LTTNG_ADD_CONTEXT:
+ {
+ struct lttng_kernel_context kctx;
+
+ /* Setup lttng message with no payload */
+ ret = setup_lttng_msg(cmd_ctx, 0);
+ if (ret < 0) {
+ goto setup_error;
+ }
+
+ switch (cmd_ctx->lsm->domain.type) {
+ case LTTNG_DOMAIN_KERNEL:
+ /* Create Kernel context */
+ kctx.ctx = cmd_ctx->lsm->u.context.ctx.ctx;
+ kctx.u.perf_counter.type = cmd_ctx->lsm->u.context.ctx.u.perf_counter.type;
+ kctx.u.perf_counter.config = cmd_ctx->lsm->u.context.ctx.u.perf_counter.config;
+ strncpy(kctx.u.perf_counter.name,
+ cmd_ctx->lsm->u.context.ctx.u.perf_counter.name,
+ LTTNG_SYMBOL_NAME_LEN);
+
+ /* Add kernel context to kernel tracer. See context.c */
+ ret = add_kernel_context(cmd_ctx->session->kernel_session, &kctx,
+ cmd_ctx->lsm->u.context.event_name,
+ cmd_ctx->lsm->u.context.channel_name);
+ if (ret != LTTCOMM_OK) {
+ goto error;
+ }
+ break;
+ default:
+ /* TODO: Userspace tracing */
+ ret = LTTCOMM_NOT_IMPLEMENTED;
+ goto error;
+ }
+
+ ret = LTTCOMM_OK;
+ break;
+ }
+ case LTTNG_DISABLE_CHANNEL:
+ {
+ struct ltt_kernel_channel *kchan;
+
+ /* Setup lttng message with no payload */
+ ret = setup_lttng_msg(cmd_ctx, 0);
+ if (ret < 0) {
+ goto setup_error;
+ }
+
+ switch (cmd_ctx->lsm->domain.type) {
+ case LTTNG_DOMAIN_KERNEL:
+ kchan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
+ cmd_ctx->session->kernel_session);
+ if (kchan == NULL) {
+ ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
+ goto error;
+ } else if (kchan->enabled == 1) {
+ ret = kernel_disable_channel(kchan);
+ if (ret < 0) {
+ if (ret != EEXIST) {
+ ret = LTTCOMM_KERN_CHAN_DISABLE_FAIL;
+ }
+ goto error;
+ }
+ }
+ kernel_wait_quiescent(kernel_tracer_fd);
+ break;
+ default:
+ /* TODO: Userspace tracing */
+ ret = LTTCOMM_NOT_IMPLEMENTED;
+ goto error;
+ }
+
+ ret = LTTCOMM_OK;
+ break;
+ }
+ case LTTNG_KERNEL_DISABLE_EVENT:
+ {
+ struct ltt_kernel_channel *chan;
+ struct ltt_kernel_event *ev;
+
+ /* Setup lttng message with no payload */
+ ret = setup_lttng_msg(cmd_ctx, 0);
+ if (ret < 0) {
+ goto setup_error;
+ }
+
+ chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
+ cmd_ctx->session->kernel_session);
+ if (chan == NULL) {
+ ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
+ goto error;
+ }
+
+ ev = get_kernel_event_by_name(cmd_ctx->lsm->u.disable.name, chan);
+ if (ev != NULL) {
+ DBG("Disabling kernel event %s for channel %s.",
+ cmd_ctx->lsm->u.disable.name, cmd_ctx->lsm->u.disable.channel_name);
+ ret = kernel_disable_event(ev);
+ if (ret < 0) {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ goto error;
+ }
+ }
+
+ kernel_wait_quiescent(kernel_tracer_fd);
+ ret = LTTCOMM_OK;
+ break;
+ }
+ case LTTNG_KERNEL_DISABLE_ALL_EVENT:
+ {
+ struct ltt_kernel_channel *chan;
+ struct ltt_kernel_event *ev;
+
+ /* Setup lttng message with no payload */
+ ret = setup_lttng_msg(cmd_ctx, 0);
+ if (ret < 0) {
+ goto setup_error;
+ }
+
+ DBG("Disabling all enabled kernel events");
+
+ chan = get_kernel_channel_by_name(cmd_ctx->lsm->u.disable.channel_name,
+ cmd_ctx->session->kernel_session);
+ if (chan == NULL) {
+ ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
+ goto error;
+ }
+
+ /* For each event in the kernel session */
+ cds_list_for_each_entry(ev, &chan->events_list.head, list) {
+ DBG("Disabling kernel event %s for channel %s.",
+ ev->event->name, cmd_ctx->lsm->u.disable.channel_name);
+ ret = kernel_disable_event(ev);
+ if (ret < 0) {
+ continue;
+ }
+ }