Commit | Line | Data |
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ab0ee2ca | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
ab0ee2ca | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
ab0ee2ca | 5 | * |
ab0ee2ca JG |
6 | */ |
7 | ||
8 | #include <lttng/trigger/trigger.h> | |
9 | #include <lttng/lttng-error.h> | |
10 | #include "notification-thread.h" | |
11 | #include "notification-thread-commands.h" | |
12 | #include <common/error.h> | |
ab0ee2ca JG |
13 | #include <unistd.h> |
14 | #include <stdint.h> | |
15 | #include <inttypes.h> | |
16 | ||
17 | static | |
18 | void init_notification_thread_command(struct notification_thread_command *cmd) | |
19 | { | |
20 | memset(cmd, 0, sizeof(*cmd)); | |
21 | CDS_INIT_LIST_HEAD(&cmd->cmd_list_node); | |
8ada111f | 22 | lttng_waiter_init(&cmd->reply_waiter); |
ab0ee2ca JG |
23 | } |
24 | ||
25 | static | |
26 | int run_command_wait(struct notification_thread_handle *handle, | |
27 | struct notification_thread_command *cmd) | |
28 | { | |
29 | int ret; | |
30 | uint64_t notification_counter = 1; | |
31 | ||
ab0ee2ca JG |
32 | pthread_mutex_lock(&handle->cmd_queue.lock); |
33 | /* Add to queue. */ | |
34 | cds_list_add_tail(&cmd->cmd_list_node, | |
35 | &handle->cmd_queue.list); | |
36 | /* Wake-up thread. */ | |
58d3fed5 | 37 | ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), |
ab0ee2ca | 38 | ¬ification_counter, sizeof(notification_counter)); |
58d3fed5 | 39 | if (ret != sizeof(notification_counter)) { |
ab0ee2ca JG |
40 | PERROR("write to notification thread's queue event fd"); |
41 | /* | |
42 | * Remove the command from the list so the notification | |
43 | * thread does not process it. | |
44 | */ | |
45 | cds_list_del(&cmd->cmd_list_node); | |
46 | goto error_unlock_queue; | |
47 | } | |
48 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
49 | ||
8ada111f | 50 | lttng_waiter_wait(&cmd->reply_waiter); |
ab0ee2ca JG |
51 | return 0; |
52 | error_unlock_queue: | |
53 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
54 | return -1; | |
55 | } | |
56 | ||
57 | enum lttng_error_code notification_thread_command_register_trigger( | |
58 | struct notification_thread_handle *handle, | |
59 | struct lttng_trigger *trigger) | |
60 | { | |
61 | int ret; | |
62 | enum lttng_error_code ret_code; | |
63 | struct notification_thread_command cmd; | |
64 | ||
65 | init_notification_thread_command(&cmd); | |
66 | ||
67 | cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER; | |
68 | cmd.parameters.trigger = trigger; | |
69 | ||
70 | ret = run_command_wait(handle, &cmd); | |
71 | if (ret) { | |
72 | ret_code = LTTNG_ERR_UNK; | |
73 | goto end; | |
74 | } | |
75 | ret_code = cmd.reply_code; | |
76 | end: | |
77 | return ret_code; | |
78 | } | |
79 | ||
80 | enum lttng_error_code notification_thread_command_unregister_trigger( | |
81 | struct notification_thread_handle *handle, | |
82 | struct lttng_trigger *trigger) | |
83 | { | |
84 | int ret; | |
85 | enum lttng_error_code ret_code; | |
86 | struct notification_thread_command cmd; | |
87 | ||
88 | init_notification_thread_command(&cmd); | |
89 | ||
90 | cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER; | |
91 | cmd.parameters.trigger = trigger; | |
92 | ||
93 | ret = run_command_wait(handle, &cmd); | |
94 | if (ret) { | |
95 | ret_code = LTTNG_ERR_UNK; | |
96 | goto end; | |
97 | } | |
98 | ret_code = cmd.reply_code; | |
99 | end: | |
100 | return ret_code; | |
101 | } | |
102 | ||
103 | enum lttng_error_code notification_thread_command_add_channel( | |
104 | struct notification_thread_handle *handle, | |
105 | char *session_name, uid_t uid, gid_t gid, | |
106 | char *channel_name, uint64_t key, | |
107 | enum lttng_domain_type domain, uint64_t capacity) | |
108 | { | |
109 | int ret; | |
110 | enum lttng_error_code ret_code; | |
111 | struct notification_thread_command cmd; | |
112 | ||
113 | init_notification_thread_command(&cmd); | |
114 | ||
115 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL; | |
8abe313a JG |
116 | cmd.parameters.add_channel.session.name = session_name; |
117 | cmd.parameters.add_channel.session.uid = uid; | |
118 | cmd.parameters.add_channel.session.gid = gid; | |
119 | cmd.parameters.add_channel.channel.name = channel_name; | |
120 | cmd.parameters.add_channel.channel.key = key; | |
121 | cmd.parameters.add_channel.channel.domain = domain; | |
122 | cmd.parameters.add_channel.channel.capacity = capacity; | |
ab0ee2ca JG |
123 | |
124 | ret = run_command_wait(handle, &cmd); | |
125 | if (ret) { | |
126 | ret_code = LTTNG_ERR_UNK; | |
127 | goto end; | |
128 | } | |
129 | ret_code = cmd.reply_code; | |
130 | end: | |
131 | return ret_code; | |
132 | } | |
133 | ||
134 | enum lttng_error_code notification_thread_command_remove_channel( | |
135 | struct notification_thread_handle *handle, | |
136 | uint64_t key, enum lttng_domain_type domain) | |
137 | { | |
138 | int ret; | |
139 | enum lttng_error_code ret_code; | |
140 | struct notification_thread_command cmd; | |
141 | ||
142 | init_notification_thread_command(&cmd); | |
143 | ||
144 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL; | |
145 | cmd.parameters.remove_channel.key = key; | |
146 | cmd.parameters.remove_channel.domain = domain; | |
147 | ||
148 | ret = run_command_wait(handle, &cmd); | |
149 | if (ret) { | |
150 | ret_code = LTTNG_ERR_UNK; | |
151 | goto end; | |
152 | } | |
153 | ret_code = cmd.reply_code; | |
154 | end: | |
155 | return ret_code; | |
156 | } | |
157 | ||
731c1b12 JG |
158 | enum lttng_error_code notification_thread_command_session_rotation_ongoing( |
159 | struct notification_thread_handle *handle, | |
160 | const char *session_name, uid_t uid, gid_t gid, | |
161 | uint64_t trace_archive_chunk_id) | |
162 | { | |
163 | int ret; | |
164 | enum lttng_error_code ret_code; | |
165 | struct notification_thread_command cmd; | |
166 | ||
167 | init_notification_thread_command(&cmd); | |
168 | ||
169 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING; | |
170 | cmd.parameters.session_rotation.session_name = session_name; | |
171 | cmd.parameters.session_rotation.uid = uid; | |
172 | cmd.parameters.session_rotation.gid = gid; | |
173 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
174 | trace_archive_chunk_id; | |
175 | ||
176 | ret = run_command_wait(handle, &cmd); | |
177 | if (ret) { | |
178 | ret_code = LTTNG_ERR_UNK; | |
179 | goto end; | |
180 | } | |
181 | ret_code = cmd.reply_code; | |
182 | end: | |
183 | return ret_code; | |
184 | } | |
185 | ||
186 | enum lttng_error_code notification_thread_command_session_rotation_completed( | |
187 | struct notification_thread_handle *handle, | |
188 | const char *session_name, uid_t uid, gid_t gid, | |
189 | uint64_t trace_archive_chunk_id, | |
190 | struct lttng_trace_archive_location *location) | |
191 | { | |
192 | int ret; | |
193 | enum lttng_error_code ret_code; | |
194 | struct notification_thread_command cmd; | |
195 | ||
196 | init_notification_thread_command(&cmd); | |
197 | ||
198 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED; | |
199 | cmd.parameters.session_rotation.session_name = session_name; | |
200 | cmd.parameters.session_rotation.uid = uid; | |
201 | cmd.parameters.session_rotation.gid = gid; | |
202 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
203 | trace_archive_chunk_id; | |
204 | cmd.parameters.session_rotation.location = location; | |
205 | ||
206 | ret = run_command_wait(handle, &cmd); | |
207 | if (ret) { | |
208 | ret_code = LTTNG_ERR_UNK; | |
209 | goto end; | |
210 | } | |
211 | ret_code = cmd.reply_code; | |
212 | end: | |
213 | return ret_code; | |
214 | } | |
215 | ||
ab0ee2ca JG |
216 | void notification_thread_command_quit( |
217 | struct notification_thread_handle *handle) | |
218 | { | |
219 | int ret; | |
220 | struct notification_thread_command cmd; | |
221 | ||
222 | init_notification_thread_command(&cmd); | |
223 | ||
224 | cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT; | |
225 | ret = run_command_wait(handle, &cmd); | |
226 | assert(!ret && cmd.reply_code == LTTNG_OK); | |
227 | } |