Size-based rotation

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

diff --git a/src/bin/lttng-sessiond/rotate.c b/src/bin/lttng-sessiond/rotate.c
index 4264cd4bd91fadeca704f9895b4c0733610a1b9c..bd6dbddf95492492eb02a5dd87d138cfffe6c108 100644 (file)
--- a/src/bin/lttng-sessiond/rotate.c
+++ b/src/bin/lttng-sessiond/rotate.c
@@ -32,6 +32,7 @@
 #include <signal.h>
 #include <inttypes.h>
 
+#include <lttng/notification/channel-internal.h>
 #include <lttng/rotate-internal.h>
 
 #include "session.h"
@@ -41,6 +42,7 @@
 #include "health-sessiond.h"
 #include "cmd.h"
 #include "utils.h"
+#include "notification-thread-commands.h"
 
 #include <urcu.h>
 #include <urcu/list.h>
@@ -401,3 +403,101 @@ int relay_rotate_pending(struct ltt_session *session, uint64_t chunk_id)
 end:
        return ret;
 }
+
+int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size,
+               struct notification_thread_handle *notification_thread_handle)
+{
+       int ret;
+       enum lttng_condition_status condition_status;
+       enum lttng_notification_channel_status nc_status;
+       struct lttng_action *action;
+
+       session->rotate_condition = lttng_condition_session_consumed_size_create();
+       if (!session->rotate_condition) {
+               ERR("Failed to create session consumed size condition object");
+               ret = -1;
+               goto end;
+       }
+
+       condition_status = lttng_condition_session_consumed_size_set_threshold(
+                       session->rotate_condition, size);
+       if (condition_status != LTTNG_CONDITION_STATUS_OK) {
+               ERR("Could not set session consumed size condition threshold (size = %" PRIu64 ")",
+                               size);
+               ret = -1;
+               goto end;
+       }
+
+       condition_status =
+                       lttng_condition_session_consumed_size_set_session_name(
+                               session->rotate_condition, session->name);
+       if (condition_status != LTTNG_CONDITION_STATUS_OK) {
+               ERR("Could not set session consumed size condition session name (name = %s)",
+                               session->name);
+               ret = -1;
+               goto end;
+       }
+
+       action = lttng_action_notify_create();
+       if (!action) {
+               ERR("Could not create notify action");
+               ret = -1;
+               goto end;
+       }
+
+       session->rotate_trigger = lttng_trigger_create(session->rotate_condition,
+                       action);
+       if (!session->rotate_trigger) {
+               ERR("Could not create size-based rotation trigger");
+               ret = -1;
+               goto end;
+       }
+
+       nc_status = lttng_notification_channel_subscribe(
+                       rotate_notification_channel, session->rotate_condition);
+       if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
+               ERR("Could not subscribe to session consumed size notification");
+               ret = -1;
+               goto end;
+       }
+
+       ret = notification_thread_command_register_trigger(
+                       notification_thread_handle, session->rotate_trigger);
+       if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
+               ERR("Register trigger, %s", lttng_strerror(ret));
+               ret = -1;
+               goto end;
+       }
+
+       ret = 0;
+
+end:
+       return ret;
+}
+
+int unsubscribe_session_consumed_size_rotation(struct ltt_session *session,
+               struct notification_thread_handle *notification_thread_handle)
+{
+       int ret = 0;
+       enum lttng_notification_channel_status status;
+
+       status = lttng_notification_channel_unsubscribe(
+                       rotate_notification_channel,
+                       session->rotate_condition);
+       if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
+               ERR("Session unsubscribe error: %d", (int) status);
+               ret = -1;
+               goto end;
+       }
+
+       ret = notification_thread_command_unregister_trigger(
+                       notification_thread_handle, session->rotate_trigger);
+       if (ret != LTTNG_OK) {
+               ERR("Session unregister trigger error: %d", ret);
+               goto end;
+       }
+
+       ret = 0;
+end:
+       return ret;
+}