Add listing kernel event support

[lttng-tools.git] / ltt-sessiond / main.c

diff --git a/ltt-sessiond/main.c b/ltt-sessiond/main.c
index 68481146eb1badc3bc30c2810448434013ac50a5..e65e8198b756add9dc21ce96922300dd2170147e 100644 (file)
--- a/ltt-sessiond/main.c
+++ b/ltt-sessiond/main.c
@@ -658,6 +658,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
        switch (cmd_ctx->lsm->cmd_type) {
        case LTTNG_CREATE_SESSION:
        case LTTNG_LIST_SESSIONS:
+       case KERNEL_LIST_EVENTS:
        case UST_LIST_APPS:
                break;
        default:
@@ -676,6 +677,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
        case KERNEL_CREATE_STREAM:
        case KERNEL_DISABLE_EVENT:
        case KERNEL_ENABLE_EVENT:
+       case KERNEL_LIST_EVENTS:
        case KERNEL_OPEN_METADATA:
        case KERNEL_START_TRACE:
        case KERNEL_STOP_TRACE:
@@ -761,6 +763,34 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
                ret = LTTCOMM_OK;
                break;
        }
+       case KERNEL_LIST_EVENTS:
+       {
+               char *event_list;
+               ssize_t size;
+
+               size = kernel_list_events(kernel_tracer_fd, &event_list);
+               if (size < 0) {
+                       ret = LTTCOMM_KERN_LIST_FAIL;
+                       goto error;
+               }
+
+               /*
+                * Setup lttng message with payload size set to the event list size in
+                * bytes and then copy list into the llm payload.
+                */
+               ret = setup_lttng_msg(cmd_ctx, size);
+               if (ret < 0) {
+                       goto setup_error;
+               }
+
+               /* Copy event list into message payload */
+               memcpy(cmd_ctx->llm->payload, event_list, size);
+
+               free(event_list);
+
+               ret = LTTCOMM_OK;
+               break;
+       }
        case KERNEL_OPEN_METADATA:
        {
                /* Setup lttng message with no payload */