4474d1978ed524f29866248910c6b697cc494282
[lttng-tools.git] / src / bin / lttng-sessiond / notification-thread-commands.c
1 /*
2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
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>
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);
22 lttng_waiter_init(&cmd->reply_waiter);
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
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. */
37 ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe),
38 &notification_counter, sizeof(notification_counter));
39 if (ret != sizeof(notification_counter)) {
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
50 lttng_waiter_wait(&cmd->reply_waiter);
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;
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;
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
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
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 }
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