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d4a2a84a DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
d4a2a84a DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
d4a2a84a | 20 | #include <stdlib.h> |
baa0e4a9 | 21 | #include <stdio.h> |
1657e9bb | 22 | #include <string.h> |
baa0e4a9 DG |
23 | #include <unistd.h> |
24 | ||
e88129fc | 25 | #include <lttng-sessiond-comm.h> |
0177d773 | 26 | #include <lttngerr.h> |
d4a2a84a | 27 | |
0177d773 DG |
28 | #include "ust-comm.h" |
29 | #include "ust-ctl.h" | |
1657e9bb DG |
30 | |
31 | /* | |
0177d773 | 32 | * Send registration done packet to the application. |
1657e9bb | 33 | */ |
0177d773 | 34 | int ustctl_register_done(int sock) |
1657e9bb | 35 | { |
0177d773 DG |
36 | struct lttcomm_ust_msg command; |
37 | struct lttcomm_ust_reply *reply; | |
471d1693 | 38 | |
0177d773 | 39 | DBG("Sending register done command to %d", sock); |
471d1693 | 40 | |
0177d773 DG |
41 | command.cmd = LTTNG_UST_REGISTER_DONE; |
42 | command.handle = LTTNG_UST_ROOT_HANDLE; | |
471d1693 | 43 | |
0177d773 DG |
44 | reply = ustcomm_send_command(sock, &command); |
45 | if (reply == NULL) { | |
471d1693 DG |
46 | goto error; |
47 | } | |
48 | ||
0177d773 DG |
49 | if (reply->ret_code != LTTCOMM_OK) { |
50 | DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code)); | |
51 | goto error; | |
471d1693 | 52 | } |
a55dd136 | 53 | |
0177d773 | 54 | return 0; |
471d1693 DG |
55 | |
56 | error: | |
0177d773 | 57 | return -1; |
471d1693 DG |
58 | } |
59 | ||
60 | /* | |
0177d773 | 61 | * Create an UST session on the tracer. |
471d1693 | 62 | */ |
44d3bd01 | 63 | int ustctl_create_session(int sock, struct ltt_ust_session *session) |
471d1693 | 64 | { |
0177d773 | 65 | struct lttcomm_ust_msg command; |
44d3bd01 | 66 | struct lttcomm_ust_reply *reply = NULL; |
471d1693 | 67 | |
0177d773 DG |
68 | command.cmd = LTTNG_UST_SESSION; |
69 | command.handle = LTTNG_UST_ROOT_HANDLE; | |
471d1693 | 70 | |
44d3bd01 | 71 | reply = ustcomm_send_command(sock, &command); |
0177d773 | 72 | if (reply == NULL) { |
471d1693 DG |
73 | goto error; |
74 | } | |
75 | ||
0177d773 DG |
76 | if (reply->ret_code != LTTCOMM_OK) { |
77 | DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code)); | |
471d1693 DG |
78 | goto error; |
79 | } | |
80 | ||
0177d773 | 81 | /* Save session handle */ |
44d3bd01 DG |
82 | session->handle = reply->ret_val; |
83 | free(reply); | |
84 | ||
85 | DBG2("ustctl create session command successful"); | |
86 | return 0; | |
87 | ||
88 | error: | |
89 | free(reply); | |
90 | return -1; | |
91 | } | |
92 | ||
93 | /* | |
94 | * Create UST channel to the tracer. | |
95 | */ | |
96 | int ustctl_create_channel(int sock, struct ltt_ust_session *session, | |
97 | struct lttng_channel *channel) | |
98 | { | |
99 | struct lttcomm_ust_msg command; | |
100 | struct lttcomm_ust_reply *reply = NULL; | |
101 | struct ltt_ust_channel *uchan; | |
102 | ||
103 | uchan = trace_ust_create_channel(channel, session->path); | |
104 | if (uchan == NULL) { | |
105 | goto error; | |
106 | } | |
107 | ||
108 | memset(&command, 0, sizeof(command)); | |
109 | ||
110 | command.cmd = LTTNG_UST_CHANNEL; | |
111 | command.handle = session->handle; | |
112 | ||
113 | /* Copy channel attributes to command */ | |
114 | memcpy(&command.u.channel, &uchan->attr, sizeof(command.u.channel)); | |
115 | ||
116 | reply = ustcomm_send_command(sock, &command); | |
117 | if (reply == NULL) { | |
118 | goto error; | |
119 | } | |
120 | ||
121 | if (reply->ret_code != LTTCOMM_OK) { | |
122 | DBG("Return code (%d): %s", reply->ret_code, | |
123 | lttcomm_get_readable_code(reply->ret_code)); | |
124 | goto error; | |
125 | } | |
126 | ||
127 | uchan->handle = reply->ret_val; | |
128 | ||
129 | /* Add channel to session */ | |
130 | cds_list_add(&uchan->list, &session->channels.head); | |
131 | session->channels.count++; | |
132 | ||
133 | free(reply); | |
134 | ||
135 | return 0; | |
136 | ||
137 | error: | |
138 | free(reply); | |
139 | return -1; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Enable UST channel. | |
144 | */ | |
145 | int ustctl_enable_channel(int sock, struct ltt_ust_session *session, | |
146 | struct ltt_ust_channel *chan) | |
147 | { | |
148 | struct lttcomm_ust_msg command; | |
149 | struct lttcomm_ust_reply *reply = NULL; | |
150 | ||
151 | memset(&command, 0, sizeof(command)); | |
152 | ||
153 | command.cmd = LTTNG_UST_ENABLE; | |
154 | command.handle = chan->handle; | |
155 | ||
156 | reply = ustcomm_send_command(sock, &command); | |
157 | if (reply == NULL) { | |
158 | goto error; | |
159 | } | |
160 | ||
161 | if (reply->ret_code != LTTCOMM_OK) { | |
162 | DBG("Return code (%d): %s", reply->ret_code, | |
163 | lttcomm_get_readable_code(reply->ret_code)); | |
164 | goto error; | |
165 | } else if (reply->handle != chan->handle) { | |
166 | ERR("Receive wrong handle from UST reply on enable channel"); | |
167 | goto error; | |
168 | } | |
169 | ||
170 | chan->enabled = 1; | |
171 | free(reply); | |
172 | ||
173 | DBG2("ustctl enable channel successful for sock %d", sock); | |
174 | return 0; | |
175 | ||
176 | error: | |
177 | free(reply); | |
178 | return -1; | |
179 | } | |
180 | ||
181 | /* | |
182 | * Disable UST channel. | |
183 | */ | |
184 | int ustctl_disable_channel(int sock, struct ltt_ust_session *session, | |
185 | struct ltt_ust_channel *chan) | |
186 | { | |
187 | struct lttcomm_ust_msg command; | |
188 | struct lttcomm_ust_reply *reply = NULL; | |
189 | ||
190 | memset(&command, 0, sizeof(command)); | |
191 | ||
192 | command.cmd = LTTNG_UST_DISABLE; | |
193 | command.handle = chan->handle; | |
194 | ||
195 | reply = ustcomm_send_command(sock, &command); | |
196 | if (reply == NULL) { | |
197 | goto error; | |
198 | } | |
199 | ||
200 | if (reply->ret_code != LTTCOMM_OK) { | |
201 | DBG("Return code (%d): %s", reply->ret_code, | |
202 | lttcomm_get_readable_code(reply->ret_code)); | |
203 | goto error; | |
204 | } else if (reply->handle != chan->handle) { | |
205 | ERR("Receive wrong handle from UST reply on enable channel"); | |
206 | goto error; | |
207 | } | |
208 | ||
209 | chan->enabled = 1; | |
210 | free(reply); | |
471d1693 | 211 | |
44d3bd01 | 212 | DBG2("ustctl disable channel successful for sock %d", sock); |
0177d773 | 213 | return 0; |
5461b305 | 214 | |
471d1693 | 215 | error: |
44d3bd01 | 216 | free(reply); |
0177d773 | 217 | return -1; |
471d1693 | 218 | } |