2 * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
3 * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 * SPDX-License-Identifier: GPL-2.0-only
10 #include <lttng/trigger/trigger.h>
11 #include <common/error.hpp>
12 #include <common/config/session-config.hpp>
13 #include <common/defaults.hpp>
14 #include <common/utils.hpp>
15 #include <common/futex.hpp>
16 #include <common/align.hpp>
17 #include <common/time.hpp>
18 #include <common/hashtable/utils.hpp>
19 #include <common/kernel-ctl/kernel-ctl.hpp>
20 #include <common/credentials.hpp>
26 #include <lttng/notification/channel-internal.hpp>
27 #include <lttng/rotate-internal.hpp>
28 #include <lttng/condition/condition-internal.hpp>
29 #include <lttng/action/action-internal.hpp>
31 #include "session.hpp"
33 #include "rotation-thread.hpp"
34 #include "lttng-sessiond.hpp"
35 #include "health-sessiond.hpp"
38 #include "notification-thread-commands.hpp"
41 #include <urcu/list.h>
42 #include <urcu/rculfhash.h>
44 int subscribe_session_consumed_size_rotation(struct ltt_session
*session
, uint64_t size
,
45 struct notification_thread_handle
*notification_thread_handle
)
48 enum lttng_condition_status condition_status
;
49 enum lttng_notification_channel_status nc_status
;
50 struct lttng_condition
*rotate_condition
= nullptr;
51 struct lttng_action
*notify_action
= nullptr;
52 const struct lttng_credentials session_creds
= {
53 .uid
= LTTNG_OPTIONAL_INIT_VALUE(session
->uid
),
54 .gid
= LTTNG_OPTIONAL_INIT_VALUE(session
->gid
),
57 rotate_condition
= lttng_condition_session_consumed_size_create();
58 if (!rotate_condition
) {
59 ERR("Failed to create session consumed size condition object");
64 condition_status
= lttng_condition_session_consumed_size_set_threshold(
65 rotate_condition
, size
);
66 if (condition_status
!= LTTNG_CONDITION_STATUS_OK
) {
67 ERR("Could not set session consumed size condition threshold (size = %" PRIu64
")",
74 lttng_condition_session_consumed_size_set_session_name(
75 rotate_condition
, session
->name
);
76 if (condition_status
!= LTTNG_CONDITION_STATUS_OK
) {
77 ERR("Could not set session consumed size condition session name (name = %s)",
83 notify_action
= lttng_action_notify_create();
85 ERR("Could not create notify action");
90 LTTNG_ASSERT(!session
->rotate_trigger
);
91 session
->rotate_trigger
= lttng_trigger_create(rotate_condition
,
93 if (!session
->rotate_trigger
) {
94 ERR("Could not create size-based rotation trigger");
99 /* Ensure this trigger is not visible to external users. */
100 lttng_trigger_set_hidden(session
->rotate_trigger
);
101 lttng_trigger_set_credentials(
102 session
->rotate_trigger
, &session_creds
);
104 nc_status
= lttng_notification_channel_subscribe(
105 rotate_notification_channel
, rotate_condition
);
106 if (nc_status
!= LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
) {
107 ERR("Could not subscribe to session consumed size notification");
112 ret
= notification_thread_command_register_trigger(
113 notification_thread_handle
, session
->rotate_trigger
,
115 if (ret
< 0 && ret
!= -LTTNG_ERR_TRIGGER_EXISTS
) {
116 ERR("Register trigger, %s", lttng_strerror(ret
));
124 lttng_condition_put(rotate_condition
);
125 lttng_action_put(notify_action
);
127 lttng_trigger_put(session
->rotate_trigger
);
132 int unsubscribe_session_consumed_size_rotation(struct ltt_session
*session
,
133 struct notification_thread_handle
*notification_thread_handle
)
136 enum lttng_notification_channel_status status
;
138 LTTNG_ASSERT(session
->rotate_trigger
);
139 status
= lttng_notification_channel_unsubscribe(
140 rotate_notification_channel
,
141 lttng_trigger_get_const_condition(session
->rotate_trigger
));
142 if (status
!= LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
) {
143 ERR("Session unsubscribe error: %d", (int) status
);
148 ret
= notification_thread_command_unregister_trigger(
149 notification_thread_handle
, session
->rotate_trigger
);
150 if (ret
!= LTTNG_OK
) {
151 ERR("Session unregister trigger error: %d", ret
);
155 lttng_trigger_put(session
->rotate_trigger
);
156 session
->rotate_trigger
= nullptr;