Sessiond: Implement cmd_clear_session

[lttng-tools.git] / src / bin / lttng-sessiond / clear.c

diff --git a/src/bin/lttng-sessiond/clear.c b/src/bin/lttng-sessiond/clear.c
new file mode 100644 (file)
index 0000000..a0917dc
--- /dev/null
+++ b/src/bin/lttng-sessiond/clear.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2019 - Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _LGPL_SOURCE
+#include <assert.h>
+#include <inttypes.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <common/defaults.h>
+#include <common/error.h>
+#include <common/utils.h>
+
+#include "clear.h"
+#include "session.h"
+#include "ust-app.h"
+#include "kernel.h"
+
+
+int cmd_clear_session(struct ltt_session *session)
+{
+       int ret;
+
+       if (!session->has_been_started) {
+                /* Nothing to be cleared, do not warn */
+                ret = LTTNG_OK;
+                goto end;
+       }
+
+       /*
+        * Unsupported feature in lttng-relayd before 2.12.
+        */
+       if (session->consumer->type == CONSUMER_DST_NET &&
+                       (session->consumer->relay_major_version == 2 &&
+                       session->consumer->relay_minor_version < 12)) {
+               ret = LTTNG_ERR_CLEAR_NOT_AVAILABLE_RELAY;
+               goto end;
+       }
+
+       /* TODO: Should we check for disallowed here or consumer side? */
+
+       /* Snapshot session are the only one supported for now */
+       if (!session->snapshot_mode) {
+               /*
+                * TODO: this error code is temporary and will be removed since
+                * we will be supporting all session type
+                */
+               ret = LTTNG_ERR_CLEAR_NOT_AVAILABLE;
+               goto end;
+       }
+
+       if (session->kernel_session) {
+               ret = kernel_clear_session(session);
+               if (ret != LTTNG_OK) {
+                       goto error;
+               }
+       }
+       if (session->ust_session) {
+               ret = ust_app_clear_session(session);
+               if (ret != LTTNG_OK) {
+                       goto error;
+               }
+       }
+error:
+end:
+       return ret;
+}