X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fmain.c;h=cec3a504a01371aed72f81f419f43a66539ba162;hb=fc58be13f62e691645dd75d56ce26d2e121b13e0;hp=489cc9d7646e5643634e04d27e71057beceee930;hpb=d086f507d02078aed618ab291a0bc4a634958fa3;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 489cc9d76..cec3a504a 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -2903,6 +2903,22 @@ static unsigned int lttng_sessions_count(uid_t uid, gid_t gid)
 	return i;
 }
 
+/*
+ * Check if the current kernel tracer supports the session rotation feature.
+ * Return 1 if it does, 0 otherwise.
+ */
+static int check_rotate_compatible(void)
+{
+	int ret = 1;
+
+	if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) {
+		DBG("Kernel tracer version is not compatible with the rotation feature");
+		ret = 0;
+	}
+
+	return ret;
+}
+
 /*
  * Process the command requested by the lttng client within the command
  * context structure. This function make sure that the return structure (llm)
@@ -2947,6 +2963,12 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
 	case LTTNG_REGENERATE_STATEDUMP:
 	case LTTNG_REGISTER_TRIGGER:
 	case LTTNG_UNREGISTER_TRIGGER:
+	case LTTNG_ROTATE_SESSION:
+	case LTTNG_ROTATION_GET_INFO:
+	case LTTNG_SESSION_GET_CURRENT_OUTPUT:
+	case LTTNG_ROTATION_SET_SCHEDULE:
+	case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD:
+	case LTTNG_ROTATION_SCHEDULE_GET_SIZE:
 		need_domain = 0;
 		break;
 	default:
@@ -2989,6 +3011,10 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
 	case LTTNG_LIST_SYSCALLS:
 	case LTTNG_LIST_TRACKER_PIDS:
 	case LTTNG_DATA_PENDING:
+	case LTTNG_ROTATE_SESSION:
+	case LTTNG_ROTATION_GET_INFO:
+	case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD:
+	case LTTNG_ROTATION_SCHEDULE_GET_SIZE:
 		break;
 	default:
 		/* Setup lttng message with no payload */
@@ -3680,6 +3706,20 @@ error_add_context:
 	}
 	case LTTNG_START_TRACE:
 	{
+		/*
+		 * On the first start, if we have a kernel session and we have
+		 * enabled time or size-based rotations, we have to make sure
+		 * the kernel tracer supports it.
+		 */
+		if (!cmd_ctx->session->has_been_started && \
+				cmd_ctx->session->kernel_session && \
+				(cmd_ctx->session->rotate_timer_period || \
+					cmd_ctx->session->rotate_size) && \
+				!check_rotate_compatible()) {
+			DBG("Kernel tracer version is not compatible with the rotation feature");
+			ret = LTTNG_ERR_ROTATION_WRONG_VERSION;
+			goto error;
+		}
 		ret = cmd_start_trace(cmd_ctx->session);
 		break;
 	}
@@ -4077,6 +4117,142 @@ error_add_context:
 				notification_thread_handle);
 		break;
 	}
+	case LTTNG_ROTATE_SESSION:
+	{
+		struct lttng_rotate_session_return rotate_return;
+
+		DBG("Client rotate session \"%s\"", cmd_ctx->session->name);
+
+		memset(&rotate_return, 0, sizeof(rotate_return));
+		if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) {
+			DBG("Kernel tracer version is not compatible with the rotation feature");
+			ret = LTTNG_ERR_ROTATION_WRONG_VERSION;
+			goto error;
+		}
+
+		ret = cmd_rotate_session(cmd_ctx->session, &rotate_return);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return,
+				sizeof(rotate_return));
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
+	case LTTNG_ROTATION_GET_INFO:
+	{
+		struct lttng_rotation_get_info_return get_info_return;
+
+		memset(&get_info_return, 0, sizeof(get_info_return));
+		ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return,
+				cmd_ctx->lsm->u.get_rotation_info.rotation_id);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return,
+				sizeof(get_info_return));
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
+	case LTTNG_SESSION_GET_CURRENT_OUTPUT:
+	{
+		struct lttng_session_get_current_output_return output_return;
+
+		memset(&output_return, 0, sizeof(output_return));
+		ret = cmd_session_get_current_output(cmd_ctx->session,
+				&output_return);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &output_return,
+				sizeof(output_return));
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
+	case LTTNG_ROTATION_SET_SCHEDULE:
+	{
+		if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) {
+			DBG("Kernel tracer version does not support session rotations");
+			ret = LTTNG_ERR_ROTATION_WRONG_VERSION;
+			goto error;
+		}
+
+		ret = cmd_rotation_set_schedule(cmd_ctx->session,
+				cmd_ctx->lsm->u.rotate_setup.timer_us,
+				cmd_ctx->lsm->u.rotate_setup.size);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
+	case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD:
+	{
+		struct lttng_rotation_schedule_get_timer_period *get_timer;
+
+		get_timer = zmalloc(sizeof(struct lttng_rotation_schedule_get_timer_period));
+		if (!get_timer) {
+			ret = ENOMEM;
+			goto error;
+		}
+		get_timer->rotate_timer = cmd_ctx->session->rotate_timer_period;
+
+		ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_timer,
+				sizeof(struct lttng_rotation_schedule_get_timer_period));
+		free(get_timer);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
+	case LTTNG_ROTATION_SCHEDULE_GET_SIZE:
+	{
+		struct lttng_rotation_schedule_get_size *get_size;
+
+		get_size = zmalloc(sizeof(struct lttng_rotation_schedule_get_size));
+		if (!get_size) {
+			ret = ENOMEM;
+			goto error;
+		}
+		get_size->rotate_size = cmd_ctx->session->rotate_size;
+
+		ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_size,
+				sizeof(struct lttng_rotation_schedule_get_size));
+		free(get_size);
+		if (ret < 0) {
+			ret = -ret;
+			goto error;
+		}
+
+		ret = LTTNG_OK;
+		break;
+	}
 	default:
 		ret = LTTNG_ERR_UND;
 		break;