Commit | Line | Data |
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db66e574 | 1 | /* |
ab5be9fa MJ |
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 | * |
db66e574 JD |
7 | */ |
8 | ||
9 | #define _LGPL_SOURCE | |
10 | #include <lttng/trigger/trigger.h> | |
c9e313bc SM |
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> | |
db66e574 JD |
21 | #include <sys/stat.h> |
22 | #include <time.h> | |
23 | #include <signal.h> | |
24 | #include <inttypes.h> | |
25 | ||
c9e313bc SM |
26 | #include <lttng/notification/channel-internal.hpp> |
27 | #include <lttng/rotate-internal.hpp> | |
c08136a3 JG |
28 | #include <lttng/condition/condition-internal.hpp> |
29 | #include <lttng/action/action-internal.hpp> | |
d88744a4 | 30 | |
c9e313bc SM |
31 | #include "session.hpp" |
32 | #include "rotate.hpp" | |
33 | #include "rotation-thread.hpp" | |
34 | #include "lttng-sessiond.hpp" | |
35 | #include "health-sessiond.hpp" | |
36 | #include "cmd.hpp" | |
37 | #include "utils.hpp" | |
38 | #include "notification-thread-commands.hpp" | |
db66e574 JD |
39 | |
40 | #include <urcu.h> | |
41 | #include <urcu/list.h> | |
42 | #include <urcu/rculfhash.h> | |
43 | ||
90936dcf JD |
44 | int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size, |
45 | struct notification_thread_handle *notification_thread_handle) | |
46 | { | |
47 | int ret; | |
48 | enum lttng_condition_status condition_status; | |
49 | enum lttng_notification_channel_status nc_status; | |
c08136a3 JG |
50 | struct lttng_condition *rotate_condition = nullptr; |
51 | struct lttng_action *notify_action = nullptr; | |
3da864a9 | 52 | const struct lttng_credentials session_creds = { |
ff588497 JR |
53 | .uid = LTTNG_OPTIONAL_INIT_VALUE(session->uid), |
54 | .gid = LTTNG_OPTIONAL_INIT_VALUE(session->gid), | |
3da864a9 | 55 | }; |
90936dcf | 56 | |
c08136a3 JG |
57 | rotate_condition = lttng_condition_session_consumed_size_create(); |
58 | if (!rotate_condition) { | |
90936dcf JD |
59 | ERR("Failed to create session consumed size condition object"); |
60 | ret = -1; | |
61 | goto end; | |
62 | } | |
63 | ||
64 | condition_status = lttng_condition_session_consumed_size_set_threshold( | |
c08136a3 | 65 | rotate_condition, size); |
90936dcf JD |
66 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
67 | ERR("Could not set session consumed size condition threshold (size = %" PRIu64 ")", | |
68 | size); | |
69 | ret = -1; | |
70 | goto end; | |
71 | } | |
72 | ||
73 | condition_status = | |
74 | lttng_condition_session_consumed_size_set_session_name( | |
c08136a3 | 75 | rotate_condition, session->name); |
90936dcf JD |
76 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
77 | ERR("Could not set session consumed size condition session name (name = %s)", | |
78 | session->name); | |
79 | ret = -1; | |
80 | goto end; | |
81 | } | |
82 | ||
c08136a3 JG |
83 | notify_action = lttng_action_notify_create(); |
84 | if (!notify_action) { | |
90936dcf JD |
85 | ERR("Could not create notify action"); |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
c08136a3 JG |
90 | LTTNG_ASSERT(!session->rotate_trigger); |
91 | session->rotate_trigger = lttng_trigger_create(rotate_condition, | |
92 | notify_action); | |
90936dcf JD |
93 | if (!session->rotate_trigger) { |
94 | ERR("Could not create size-based rotation trigger"); | |
95 | ret = -1; | |
96 | goto end; | |
97 | } | |
98 | ||
f2bda80e JG |
99 | /* Ensure this trigger is not visible to external users. */ |
100 | lttng_trigger_set_hidden(session->rotate_trigger); | |
3da864a9 JR |
101 | lttng_trigger_set_credentials( |
102 | session->rotate_trigger, &session_creds); | |
103 | ||
90936dcf | 104 | nc_status = lttng_notification_channel_subscribe( |
c08136a3 | 105 | rotate_notification_channel, rotate_condition); |
90936dcf JD |
106 | if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { |
107 | ERR("Could not subscribe to session consumed size notification"); | |
108 | ret = -1; | |
109 | goto end; | |
110 | } | |
111 | ||
112 | ret = notification_thread_command_register_trigger( | |
0efb2ad7 JG |
113 | notification_thread_handle, session->rotate_trigger, |
114 | true); | |
90936dcf JD |
115 | if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) { |
116 | ERR("Register trigger, %s", lttng_strerror(ret)); | |
117 | ret = -1; | |
118 | goto end; | |
119 | } | |
120 | ||
121 | ret = 0; | |
122 | ||
123 | end: | |
c08136a3 JG |
124 | lttng_condition_put(rotate_condition); |
125 | lttng_action_put(notify_action); | |
126 | if (ret) { | |
127 | lttng_trigger_put(session->rotate_trigger); | |
128 | } | |
90936dcf JD |
129 | return ret; |
130 | } | |
131 | ||
132 | int unsubscribe_session_consumed_size_rotation(struct ltt_session *session, | |
133 | struct notification_thread_handle *notification_thread_handle) | |
134 | { | |
135 | int ret = 0; | |
136 | enum lttng_notification_channel_status status; | |
137 | ||
c08136a3 | 138 | LTTNG_ASSERT(session->rotate_trigger); |
90936dcf JD |
139 | status = lttng_notification_channel_unsubscribe( |
140 | rotate_notification_channel, | |
c08136a3 | 141 | lttng_trigger_get_const_condition(session->rotate_trigger)); |
90936dcf JD |
142 | if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { |
143 | ERR("Session unsubscribe error: %d", (int) status); | |
144 | ret = -1; | |
145 | goto end; | |
146 | } | |
147 | ||
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); | |
152 | goto end; | |
153 | } | |
154 | ||
c08136a3 JG |
155 | lttng_trigger_put(session->rotate_trigger); |
156 | session->rotate_trigger = nullptr; | |
157 | ||
90936dcf JD |
158 | ret = 0; |
159 | end: | |
160 | return ret; | |
161 | } |