Add calibrate command

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

diff --git a/ltt-sessiond/main.c b/ltt-sessiond/main.c
index b3dc0e3a6f08ee397935c8a672e2470179633980..5636700d8fad1cd3127c9c6571b03a648782261d 100644 (file)
--- a/ltt-sessiond/main.c
+++ b/ltt-sessiond/main.c
@@ -1321,6 +1321,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
        case LTTNG_CREATE_SESSION:
        case LTTNG_LIST_SESSIONS:
        case LTTNG_LIST_TRACEPOINTS:
+       case LTTNG_CALIBRATE:
                break;
        default:
                DBG("Getting session %s by name", cmd_ctx->lsm->session.name);
@@ -1341,7 +1342,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
        }
 
        /*
-        * Check domain type for specifif "pre-action".
+        * Check domain type for specific "pre-action".
         */
        switch (cmd_ctx->lsm->domain.type) {
        case LTTNG_DOMAIN_KERNEL:
@@ -1355,21 +1356,27 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
                }
 
                /* Need a session for kernel command */
-               if (cmd_ctx->lsm->cmd_type != LTTNG_LIST_TRACEPOINTS &&
-                               cmd_ctx->session->kernel_session == NULL) {
-
-                       ret = create_kernel_session(cmd_ctx->session);
-                       if (ret < 0) {
-                               ret = LTTCOMM_KERN_SESS_FAIL;
-                               goto error;
-                       }
-
-                       /* Start the kernel consumer daemon */
-                       if (kconsumerd_pid == 0) {
-                               ret = start_kconsumerd();
+               switch (cmd_ctx->lsm->cmd_type) {
+               case LTTNG_CREATE_SESSION:
+               case LTTNG_LIST_SESSIONS:
+               case LTTNG_LIST_TRACEPOINTS:
+               case LTTNG_CALIBRATE:
+                       break;
+               default:
+                       if (cmd_ctx->session->kernel_session == NULL) {
+                               ret = create_kernel_session(cmd_ctx->session);
                                if (ret < 0) {
+                                       ret = LTTCOMM_KERN_SESS_FAIL;
                                        goto error;
                                }
+
+                               /* Start the kernel consumer daemon */
+                               if (kconsumerd_pid == 0) {
+                                       ret = start_kconsumerd();
+                                       if (ret < 0) {
+                                               goto error;
+                                       }
+                               }
                        }
                }
                break;
@@ -2049,6 +2056,37 @@ static int process_client_msg(struct command_ctx *cmd_ctx)
                ret = LTTCOMM_OK;
                break;
        }
+
+       case LTTNG_CALIBRATE:
+       {
+               /* 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:
+               {
+                       struct lttng_kernel_calibrate kcalibrate;
+
+                       kcalibrate.type = cmd_ctx->lsm->u.calibrate.type;
+                       ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate);
+                       if (ret < 0) {
+                               ret = LTTCOMM_KERN_ENABLE_FAIL;
+                               goto error;
+                       }
+                       break;
+               }
+               default:
+                       /* TODO: Userspace tracing */
+                       ret = LTTCOMM_NOT_IMPLEMENTED;
+                       goto error;
+               }
+               ret = LTTCOMM_OK;
+               break;
+       }
+
        default:
                /* Undefined command */
                ret = setup_lttng_msg(cmd_ctx, 0);