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ab0ee2ca JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #include <lttng/trigger/trigger.h> | |
19 | #include <lttng/lttng-error.h> | |
20 | #include "notification-thread.h" | |
21 | #include "notification-thread-commands.h" | |
22 | #include <common/error.h> | |
ab0ee2ca JG |
23 | #include <unistd.h> |
24 | #include <stdint.h> | |
25 | #include <inttypes.h> | |
26 | ||
27 | static | |
28 | void init_notification_thread_command(struct notification_thread_command *cmd) | |
29 | { | |
30 | memset(cmd, 0, sizeof(*cmd)); | |
31 | CDS_INIT_LIST_HEAD(&cmd->cmd_list_node); | |
8ada111f | 32 | lttng_waiter_init(&cmd->reply_waiter); |
ab0ee2ca JG |
33 | } |
34 | ||
35 | static | |
36 | int run_command_wait(struct notification_thread_handle *handle, | |
37 | struct notification_thread_command *cmd) | |
38 | { | |
39 | int ret; | |
40 | uint64_t notification_counter = 1; | |
41 | ||
ab0ee2ca JG |
42 | pthread_mutex_lock(&handle->cmd_queue.lock); |
43 | /* Add to queue. */ | |
44 | cds_list_add_tail(&cmd->cmd_list_node, | |
45 | &handle->cmd_queue.list); | |
46 | /* Wake-up thread. */ | |
814b4934 | 47 | ret = write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), |
ab0ee2ca JG |
48 | ¬ification_counter, sizeof(notification_counter)); |
49 | if (ret < 0) { | |
50 | PERROR("write to notification thread's queue event fd"); | |
51 | /* | |
52 | * Remove the command from the list so the notification | |
53 | * thread does not process it. | |
54 | */ | |
55 | cds_list_del(&cmd->cmd_list_node); | |
56 | goto error_unlock_queue; | |
57 | } | |
58 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
59 | ||
8ada111f | 60 | lttng_waiter_wait(&cmd->reply_waiter); |
ab0ee2ca JG |
61 | return 0; |
62 | error_unlock_queue: | |
63 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
64 | return -1; | |
65 | } | |
66 | ||
67 | enum lttng_error_code notification_thread_command_register_trigger( | |
68 | struct notification_thread_handle *handle, | |
69 | struct lttng_trigger *trigger) | |
70 | { | |
71 | int ret; | |
72 | enum lttng_error_code ret_code; | |
73 | struct notification_thread_command cmd; | |
74 | ||
75 | init_notification_thread_command(&cmd); | |
76 | ||
77 | cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER; | |
78 | cmd.parameters.trigger = trigger; | |
79 | ||
80 | ret = run_command_wait(handle, &cmd); | |
81 | if (ret) { | |
82 | ret_code = LTTNG_ERR_UNK; | |
83 | goto end; | |
84 | } | |
85 | ret_code = cmd.reply_code; | |
86 | end: | |
87 | return ret_code; | |
88 | } | |
89 | ||
90 | enum lttng_error_code notification_thread_command_unregister_trigger( | |
91 | struct notification_thread_handle *handle, | |
92 | struct lttng_trigger *trigger) | |
93 | { | |
94 | int ret; | |
95 | enum lttng_error_code ret_code; | |
96 | struct notification_thread_command cmd; | |
97 | ||
98 | init_notification_thread_command(&cmd); | |
99 | ||
100 | cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER; | |
101 | cmd.parameters.trigger = trigger; | |
102 | ||
103 | ret = run_command_wait(handle, &cmd); | |
104 | if (ret) { | |
105 | ret_code = LTTNG_ERR_UNK; | |
106 | goto end; | |
107 | } | |
108 | ret_code = cmd.reply_code; | |
109 | end: | |
110 | return ret_code; | |
111 | } | |
112 | ||
113 | enum lttng_error_code notification_thread_command_add_channel( | |
114 | struct notification_thread_handle *handle, | |
115 | char *session_name, uid_t uid, gid_t gid, | |
116 | char *channel_name, uint64_t key, | |
117 | enum lttng_domain_type domain, uint64_t capacity) | |
118 | { | |
119 | int ret; | |
120 | enum lttng_error_code ret_code; | |
121 | struct notification_thread_command cmd; | |
122 | ||
123 | init_notification_thread_command(&cmd); | |
124 | ||
125 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL; | |
8abe313a JG |
126 | cmd.parameters.add_channel.session.name = session_name; |
127 | cmd.parameters.add_channel.session.uid = uid; | |
128 | cmd.parameters.add_channel.session.gid = gid; | |
129 | cmd.parameters.add_channel.channel.name = channel_name; | |
130 | cmd.parameters.add_channel.channel.key = key; | |
131 | cmd.parameters.add_channel.channel.domain = domain; | |
132 | cmd.parameters.add_channel.channel.capacity = capacity; | |
ab0ee2ca JG |
133 | |
134 | ret = run_command_wait(handle, &cmd); | |
135 | if (ret) { | |
136 | ret_code = LTTNG_ERR_UNK; | |
137 | goto end; | |
138 | } | |
139 | ret_code = cmd.reply_code; | |
140 | end: | |
141 | return ret_code; | |
142 | } | |
143 | ||
144 | enum lttng_error_code notification_thread_command_remove_channel( | |
145 | struct notification_thread_handle *handle, | |
146 | uint64_t key, enum lttng_domain_type domain) | |
147 | { | |
148 | int ret; | |
149 | enum lttng_error_code ret_code; | |
150 | struct notification_thread_command cmd; | |
151 | ||
152 | init_notification_thread_command(&cmd); | |
153 | ||
154 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL; | |
155 | cmd.parameters.remove_channel.key = key; | |
156 | cmd.parameters.remove_channel.domain = domain; | |
157 | ||
158 | ret = run_command_wait(handle, &cmd); | |
159 | if (ret) { | |
160 | ret_code = LTTNG_ERR_UNK; | |
161 | goto end; | |
162 | } | |
163 | ret_code = cmd.reply_code; | |
164 | end: | |
165 | return ret_code; | |
166 | } | |
167 | ||
731c1b12 JG |
168 | enum lttng_error_code notification_thread_command_session_rotation_ongoing( |
169 | struct notification_thread_handle *handle, | |
170 | const char *session_name, uid_t uid, gid_t gid, | |
171 | uint64_t trace_archive_chunk_id) | |
172 | { | |
173 | int ret; | |
174 | enum lttng_error_code ret_code; | |
175 | struct notification_thread_command cmd; | |
176 | ||
177 | init_notification_thread_command(&cmd); | |
178 | ||
179 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING; | |
180 | cmd.parameters.session_rotation.session_name = session_name; | |
181 | cmd.parameters.session_rotation.uid = uid; | |
182 | cmd.parameters.session_rotation.gid = gid; | |
183 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
184 | trace_archive_chunk_id; | |
185 | ||
186 | ret = run_command_wait(handle, &cmd); | |
187 | if (ret) { | |
188 | ret_code = LTTNG_ERR_UNK; | |
189 | goto end; | |
190 | } | |
191 | ret_code = cmd.reply_code; | |
192 | end: | |
193 | return ret_code; | |
194 | } | |
195 | ||
196 | enum lttng_error_code notification_thread_command_session_rotation_completed( | |
197 | struct notification_thread_handle *handle, | |
198 | const char *session_name, uid_t uid, gid_t gid, | |
199 | uint64_t trace_archive_chunk_id, | |
200 | struct lttng_trace_archive_location *location) | |
201 | { | |
202 | int ret; | |
203 | enum lttng_error_code ret_code; | |
204 | struct notification_thread_command cmd; | |
205 | ||
206 | init_notification_thread_command(&cmd); | |
207 | ||
208 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED; | |
209 | cmd.parameters.session_rotation.session_name = session_name; | |
210 | cmd.parameters.session_rotation.uid = uid; | |
211 | cmd.parameters.session_rotation.gid = gid; | |
212 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
213 | trace_archive_chunk_id; | |
214 | cmd.parameters.session_rotation.location = location; | |
215 | ||
216 | ret = run_command_wait(handle, &cmd); | |
217 | if (ret) { | |
218 | ret_code = LTTNG_ERR_UNK; | |
219 | goto end; | |
220 | } | |
221 | ret_code = cmd.reply_code; | |
222 | end: | |
223 | return ret_code; | |
224 | } | |
225 | ||
ab0ee2ca JG |
226 | void notification_thread_command_quit( |
227 | struct notification_thread_handle *handle) | |
228 | { | |
229 | int ret; | |
230 | struct notification_thread_command cmd; | |
231 | ||
232 | init_notification_thread_command(&cmd); | |
233 | ||
234 | cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT; | |
235 | ret = run_command_wait(handle, &cmd); | |
236 | assert(!ret && cmd.reply_code == LTTNG_OK); | |
237 | } |