sessiond: lttng: Add command to check kernel tracer status

[lttng-tools.git] / src / bin / lttng-sessiond / client.cpp

diff --git a/src/bin/lttng-sessiond/client.cpp b/src/bin/lttng-sessiond/client.cpp
index a89c61e9c54d166a1eb106d202ffba5d9c699775..43a8b793e9ed366d5be2631feca34cc8f190ddef 100644 (file)
--- a/src/bin/lttng-sessiond/client.cpp
+++ b/src/bin/lttng-sessiond/client.cpp
@@ -1033,6 +1033,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int *sock, int *sock_
        case LTTCOMM_SESSIOND_COMMAND_CLEAR_SESSION:
        case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS:
        case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY:
+       case LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS:
                need_domain = false;
                break;
        default:
@@ -1116,6 +1117,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int *sock, int *sock_
        case LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER:
        case LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS:
        case LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY:
+       case LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS:
                need_tracing_session = false;
                break;
        default:
@@ -1927,6 +1929,25 @@ skip_domain:
                        cmd_ctx->session, cmd_ctx->lsm.domain.type, cmd_ctx->lsm.u.reg.path, cdata);
                break;
        }
+       case LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS:
+       {
+               uint32_t u_status;
+               enum lttng_kernel_tracer_status status;
+
+               ret = cmd_kernel_tracer_status(&status);
+               if (ret != LTTNG_OK) {
+                       goto error;
+               }
+
+               u_status = (uint32_t) status;
+               ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &u_status, 4);
+               if (ret < 0) {
+                       goto error;
+               }
+
+               ret = LTTNG_OK;
+               break;
+       }
        case LTTCOMM_SESSIOND_COMMAND_DATA_PENDING:
        {
                int pending_ret;