Commit | Line | Data |
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26cc6b4e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
26cc6b4e DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
26cc6b4e DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <popt.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
50534d6f JRJ |
26 | #include <assert.h> |
27 | ||
28 | #include <common/mi-lttng.h> | |
26cc6b4e | 29 | |
c399183f | 30 | #include "../command.h" |
26cc6b4e DG |
31 | |
32 | static char *opt_channels; | |
e14f64a8 | 33 | static int opt_kernel; |
5440dc42 | 34 | static char *opt_session_name; |
26cc6b4e | 35 | static int opt_userspace; |
d78d6610 DG |
36 | #if 0 |
37 | /* Not implemented yet */ | |
eeac7d46 | 38 | static char *opt_cmd_name; |
26cc6b4e | 39 | static pid_t opt_pid; |
d78d6610 | 40 | #endif |
26cc6b4e DG |
41 | |
42 | enum { | |
43 | OPT_HELP = 1, | |
44 | OPT_USERSPACE, | |
679b4943 | 45 | OPT_LIST_OPTIONS, |
26cc6b4e DG |
46 | }; |
47 | ||
cd80958d | 48 | static struct lttng_handle *handle; |
50534d6f | 49 | static struct mi_writer *writer; |
cd80958d | 50 | |
26cc6b4e DG |
51 | static struct poptOption long_options[] = { |
52 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
53 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 54 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
26cc6b4e | 55 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 DG |
56 | #if 0 |
57 | /* Not implemented yet */ | |
6caa2bcc | 58 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
26cc6b4e | 59 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
d78d6610 DG |
60 | #else |
61 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
62 | #endif | |
679b4943 | 63 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
26cc6b4e DG |
64 | {0, 0, 0, 0, 0, 0, 0} |
65 | }; | |
66 | ||
67 | /* | |
68 | * usage | |
69 | */ | |
70 | static void usage(FILE *ofp) | |
71 | { | |
272c6a17 | 72 | fprintf(ofp, "usage: lttng disable-channel NAME[,NAME2,...] (-k | -u) [OPTIONS]\n"); |
26cc6b4e | 73 | fprintf(ofp, "\n"); |
32a6298d | 74 | fprintf(ofp, "Options:\n"); |
78f0bacd | 75 | fprintf(ofp, " -h, --help Show this help\n"); |
679b4943 | 76 | fprintf(ofp, " --list-options Simple listing of options\n"); |
32a6298d | 77 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); |
27221701 | 78 | fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n"); |
27221701 | 79 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
26cc6b4e DG |
80 | fprintf(ofp, "\n"); |
81 | } | |
82 | ||
50534d6f JRJ |
83 | static int mi_partial_channel_print(char *channel_name, unsigned int enabled, |
84 | int success) | |
85 | { | |
86 | int ret; | |
87 | ||
88 | assert(writer); | |
89 | assert(channel_name); | |
90 | ||
91 | /* Open channel element */ | |
92 | ret = mi_lttng_writer_open_element(writer, config_element_channel); | |
93 | if (ret) { | |
94 | goto end; | |
95 | } | |
96 | ||
97 | /* Name */ | |
98 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
99 | channel_name); | |
100 | if (ret) { | |
101 | goto end; | |
102 | } | |
103 | ||
104 | /* Enabled ? */ | |
105 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
106 | enabled); | |
107 | if (ret) { | |
108 | goto end; | |
109 | } | |
110 | ||
111 | /* Success ? */ | |
112 | ret = mi_lttng_writer_write_element_bool(writer, | |
9618049b | 113 | mi_lttng_element_success, success); |
50534d6f JRJ |
114 | if (ret) { |
115 | goto end; | |
116 | } | |
117 | ||
118 | /* Closing channel element */ | |
119 | ret = mi_lttng_writer_close_element(writer); | |
120 | ||
121 | end: | |
122 | return ret; | |
123 | } | |
124 | ||
26cc6b4e | 125 | /* |
cd80958d | 126 | * Disabling channel using the lttng API. |
26cc6b4e | 127 | */ |
cd80958d | 128 | static int disable_channels(char *session_name) |
26cc6b4e | 129 | { |
50534d6f JRJ |
130 | int ret = CMD_SUCCESS, warn = 0, success; |
131 | ||
132 | /* Normal case for disable channed is enabled = 0 */ | |
133 | unsigned int enabled = 0; | |
26cc6b4e | 134 | char *channel_name; |
7d29a247 | 135 | struct lttng_domain dom; |
26cc6b4e | 136 | |
441c16a7 MD |
137 | memset(&dom, 0, sizeof(dom)); |
138 | ||
d78d6610 | 139 | /* Create lttng domain */ |
7d29a247 DG |
140 | if (opt_kernel) { |
141 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 142 | } else if (opt_userspace) { |
78f0bacd | 143 | dom.type = LTTNG_DOMAIN_UST; |
78f0bacd | 144 | } else { |
b9dfb167 | 145 | print_missing_domain(); |
d16c1a4c | 146 | ret = CMD_ERROR; |
78f0bacd | 147 | goto error; |
7d29a247 DG |
148 | } |
149 | ||
cd80958d DG |
150 | handle = lttng_create_handle(session_name, &dom); |
151 | if (handle == NULL) { | |
152 | ret = -1; | |
153 | goto error; | |
154 | } | |
155 | ||
50534d6f JRJ |
156 | /* Prepare MI */ |
157 | if (lttng_opt_mi) { | |
158 | /* open a channels element */ | |
159 | ret = mi_lttng_writer_open_element(writer, config_element_channels); | |
160 | if (ret) { | |
161 | ret = CMD_ERROR; | |
162 | goto error; | |
163 | } | |
164 | ||
165 | } | |
166 | ||
26cc6b4e DG |
167 | /* Strip channel list */ |
168 | channel_name = strtok(opt_channels, ","); | |
169 | while (channel_name != NULL) { | |
78f0bacd DG |
170 | DBG("Disabling channel %s", channel_name); |
171 | ||
172 | ret = lttng_disable_channel(handle, channel_name); | |
173 | if (ret < 0) { | |
ae856491 DG |
174 | ERR("Channel %s: %s (session %s)", channel_name, |
175 | lttng_strerror(ret), session_name); | |
176 | warn = 1; | |
50534d6f JRJ |
177 | |
178 | /* | |
179 | * Mi: | |
180 | * We assume that if an error occurred the channel is still active. | |
181 | * This might not be the case but is a good assumption. | |
9618049b JRJ |
182 | * The client should look at the stderr stream |
183 | * for more informations. | |
50534d6f JRJ |
184 | */ |
185 | enabled = 1; | |
186 | success = 0; | |
187 | ||
26cc6b4e | 188 | } else { |
7885e399 | 189 | MSG("%s channel %s disabled for session %s", |
b9dfb167 | 190 | get_domain_str(dom.type), channel_name, session_name); |
50534d6f JRJ |
191 | enabled = 0; |
192 | success = 1; | |
193 | } | |
194 | ||
195 | /* Print the channel */ | |
196 | if (lttng_opt_mi) { | |
197 | ret = mi_partial_channel_print(channel_name, enabled, success); | |
198 | if (ret) { | |
199 | ret = CMD_ERROR; | |
200 | goto error; | |
201 | } | |
26cc6b4e DG |
202 | } |
203 | ||
204 | /* Next channel */ | |
205 | channel_name = strtok(NULL, ","); | |
206 | } | |
207 | ||
ae856491 DG |
208 | ret = CMD_SUCCESS; |
209 | ||
50534d6f JRJ |
210 | /* Close Mi */ |
211 | if (lttng_opt_mi) { | |
212 | /* Close channels element */ | |
213 | ret = mi_lttng_writer_close_element(writer); | |
214 | if (ret) { | |
215 | ret = CMD_ERROR; | |
216 | goto error; | |
217 | } | |
218 | } | |
219 | ||
26cc6b4e | 220 | error: |
50534d6f JRJ |
221 | /* Bypass the warning if a more important error happened */ |
222 | if (!ret && warn) { | |
ae856491 DG |
223 | ret = CMD_WARNING; |
224 | } | |
225 | ||
cd80958d DG |
226 | lttng_destroy_handle(handle); |
227 | ||
26cc6b4e DG |
228 | return ret; |
229 | } | |
230 | ||
231 | /* | |
232 | * cmd_disable_channels | |
233 | * | |
234 | * Disable channel to trace session | |
235 | */ | |
236 | int cmd_disable_channels(int argc, const char **argv) | |
237 | { | |
50534d6f | 238 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
26cc6b4e | 239 | static poptContext pc; |
cd80958d | 240 | char *session_name = NULL; |
26cc6b4e DG |
241 | |
242 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
243 | poptReadDefaultConfig(pc, 0); | |
244 | ||
245 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
246 | switch (opt) { | |
247 | case OPT_HELP: | |
ca1c3607 | 248 | usage(stdout); |
26cc6b4e DG |
249 | goto end; |
250 | case OPT_USERSPACE: | |
251 | opt_userspace = 1; | |
252 | break; | |
679b4943 SM |
253 | case OPT_LIST_OPTIONS: |
254 | list_cmd_options(stdout, long_options); | |
679b4943 | 255 | goto end; |
26cc6b4e DG |
256 | default: |
257 | usage(stderr); | |
258 | ret = CMD_UNDEFINED; | |
259 | goto end; | |
260 | } | |
261 | } | |
262 | ||
263 | opt_channels = (char*) poptGetArg(pc); | |
264 | if (opt_channels == NULL) { | |
265 | ERR("Missing channel name(s).\n"); | |
266 | usage(stderr); | |
ca1c3607 | 267 | ret = CMD_ERROR; |
26cc6b4e DG |
268 | goto end; |
269 | } | |
270 | ||
cd80958d DG |
271 | if (!opt_session_name) { |
272 | session_name = get_session_name(); | |
273 | if (session_name == NULL) { | |
ca1c3607 | 274 | ret = CMD_ERROR; |
cd80958d DG |
275 | goto end; |
276 | } | |
277 | } else { | |
278 | session_name = opt_session_name; | |
279 | } | |
280 | ||
50534d6f JRJ |
281 | /* Mi check */ |
282 | if (lttng_opt_mi) { | |
283 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
284 | if (!writer) { | |
285 | ret = -LTTNG_ERR_NOMEM; | |
286 | goto end; | |
287 | } | |
288 | ||
289 | /* Open command element */ | |
290 | ret = mi_lttng_writer_command_open(writer, | |
291 | mi_lttng_element_command_disable_channel); | |
292 | if (ret) { | |
293 | ret = CMD_ERROR; | |
294 | goto end; | |
295 | } | |
296 | ||
297 | /* Open output element */ | |
298 | ret = mi_lttng_writer_open_element(writer, | |
299 | mi_lttng_element_command_output); | |
300 | if (ret) { | |
301 | ret = CMD_ERROR; | |
302 | goto end; | |
303 | } | |
304 | } | |
305 | ||
306 | command_ret = disable_channels(session_name); | |
307 | if (command_ret) { | |
308 | success = 0; | |
309 | } | |
310 | ||
311 | /* Mi closing */ | |
312 | if (lttng_opt_mi) { | |
313 | /* Close output element */ | |
314 | ret = mi_lttng_writer_close_element(writer); | |
315 | if (ret) { | |
316 | ret = CMD_ERROR; | |
317 | goto end; | |
318 | } | |
319 | ||
320 | /* Success ? */ | |
321 | ret = mi_lttng_writer_write_element_bool(writer, | |
322 | mi_lttng_element_success, success); | |
323 | if (ret) { | |
324 | ret = CMD_ERROR; | |
325 | goto end; | |
326 | } | |
327 | ||
328 | /* Command element close */ | |
329 | ret = mi_lttng_writer_command_close(writer); | |
330 | if (ret) { | |
331 | ret = CMD_ERROR; | |
332 | goto end; | |
333 | } | |
334 | } | |
26cc6b4e DG |
335 | |
336 | end: | |
50534d6f JRJ |
337 | /* Mi clean-up */ |
338 | if (writer && mi_lttng_writer_destroy(writer)) { | |
339 | /* Preserve original error code */ | |
340 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
341 | } | |
342 | ||
5853fd43 DG |
343 | if (!opt_session_name && session_name) { |
344 | free(session_name); | |
345 | } | |
50534d6f JRJ |
346 | |
347 | /* Overwrite ret if an error occurred in disable_channels */ | |
348 | ret = command_ret ? command_ret : ret; | |
349 | ||
ca1c3607 | 350 | poptFreeContext(pc); |
26cc6b4e DG |
351 | return ret; |
352 | } |