Fix: lttng: -Wshadow error in cmd_snapshot
[lttng-tools.git] / src / bin / lttng-sessiond / rotate.c
CommitLineData
db66e574 1/*
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2 * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com>
3 * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
db66e574 4 *
ab5be9fa 5 * SPDX-License-Identifier: GPL-2.0-only
db66e574 6 *
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7 */
8
9#define _LGPL_SOURCE
10#include <lttng/trigger/trigger.h>
11#include <common/error.h>
12#include <common/config/session-config.h>
13#include <common/defaults.h>
14#include <common/utils.h>
15#include <common/futex.h>
16#include <common/align.h>
17#include <common/time.h>
18#include <common/hashtable/utils.h>
19#include <common/kernel-ctl/kernel-ctl.h>
3da864a9 20#include <common/credentials.h>
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21#include <sys/stat.h>
22#include <time.h>
23#include <signal.h>
24#include <inttypes.h>
25
90936dcf 26#include <lttng/notification/channel-internal.h>
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27#include <lttng/rotate-internal.h>
28
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29#include "session.h"
30#include "rotate.h"
31#include "rotation-thread.h"
32#include "lttng-sessiond.h"
33#include "health-sessiond.h"
34#include "cmd.h"
35#include "utils.h"
90936dcf 36#include "notification-thread-commands.h"
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37
38#include <urcu.h>
39#include <urcu/list.h>
40#include <urcu/rculfhash.h>
41
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42int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size,
43 struct notification_thread_handle *notification_thread_handle)
44{
45 int ret;
46 enum lttng_condition_status condition_status;
47 enum lttng_notification_channel_status nc_status;
48 struct lttng_action *action;
3da864a9 49 const struct lttng_credentials session_creds = {
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50 .uid = LTTNG_OPTIONAL_INIT_VALUE(session->uid),
51 .gid = LTTNG_OPTIONAL_INIT_VALUE(session->gid),
3da864a9 52 };
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53
54 session->rotate_condition = lttng_condition_session_consumed_size_create();
55 if (!session->rotate_condition) {
56 ERR("Failed to create session consumed size condition object");
57 ret = -1;
58 goto end;
59 }
60
61 condition_status = lttng_condition_session_consumed_size_set_threshold(
62 session->rotate_condition, size);
63 if (condition_status != LTTNG_CONDITION_STATUS_OK) {
64 ERR("Could not set session consumed size condition threshold (size = %" PRIu64 ")",
65 size);
66 ret = -1;
67 goto end;
68 }
69
70 condition_status =
71 lttng_condition_session_consumed_size_set_session_name(
72 session->rotate_condition, session->name);
73 if (condition_status != LTTNG_CONDITION_STATUS_OK) {
74 ERR("Could not set session consumed size condition session name (name = %s)",
75 session->name);
76 ret = -1;
77 goto end;
78 }
79
80 action = lttng_action_notify_create();
81 if (!action) {
82 ERR("Could not create notify action");
83 ret = -1;
84 goto end;
85 }
86
87 session->rotate_trigger = lttng_trigger_create(session->rotate_condition,
88 action);
89 if (!session->rotate_trigger) {
90 ERR("Could not create size-based rotation trigger");
91 ret = -1;
92 goto end;
93 }
94
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95 lttng_trigger_set_credentials(
96 session->rotate_trigger, &session_creds);
97
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98 nc_status = lttng_notification_channel_subscribe(
99 rotate_notification_channel, session->rotate_condition);
100 if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
101 ERR("Could not subscribe to session consumed size notification");
102 ret = -1;
103 goto end;
104 }
105
106 ret = notification_thread_command_register_trigger(
107 notification_thread_handle, session->rotate_trigger);
108 if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
109 ERR("Register trigger, %s", lttng_strerror(ret));
110 ret = -1;
111 goto end;
112 }
113
114 ret = 0;
115
116end:
117 return ret;
118}
119
120int unsubscribe_session_consumed_size_rotation(struct ltt_session *session,
121 struct notification_thread_handle *notification_thread_handle)
122{
123 int ret = 0;
124 enum lttng_notification_channel_status status;
125
126 status = lttng_notification_channel_unsubscribe(
127 rotate_notification_channel,
128 session->rotate_condition);
129 if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
130 ERR("Session unsubscribe error: %d", (int) status);
131 ret = -1;
132 goto end;
133 }
134
135 ret = notification_thread_command_unregister_trigger(
136 notification_thread_handle, session->rotate_trigger);
137 if (ret != LTTNG_OK) {
138 ERR("Session unregister trigger error: %d", ret);
139 goto end;
140 }
141
142 ret = 0;
143end:
144 return ret;
145}
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