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 | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
26cc6b4e DG |
20 | #include <popt.h> |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <unistd.h> | |
50534d6f JRJ |
27 | #include <assert.h> |
28 | ||
29 | #include <common/mi-lttng.h> | |
26cc6b4e | 30 | |
c399183f | 31 | #include "../command.h" |
26cc6b4e DG |
32 | |
33 | static char *opt_channels; | |
e14f64a8 | 34 | static int opt_kernel; |
5440dc42 | 35 | static char *opt_session_name; |
26cc6b4e | 36 | static int opt_userspace; |
d78d6610 DG |
37 | #if 0 |
38 | /* Not implemented yet */ | |
eeac7d46 | 39 | static char *opt_cmd_name; |
26cc6b4e | 40 | static pid_t opt_pid; |
d78d6610 | 41 | #endif |
26cc6b4e DG |
42 | |
43 | enum { | |
44 | OPT_HELP = 1, | |
45 | OPT_USERSPACE, | |
679b4943 | 46 | OPT_LIST_OPTIONS, |
26cc6b4e DG |
47 | }; |
48 | ||
cd80958d | 49 | static struct lttng_handle *handle; |
50534d6f | 50 | static struct mi_writer *writer; |
cd80958d | 51 | |
26cc6b4e DG |
52 | static struct poptOption long_options[] = { |
53 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
54 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 55 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
26cc6b4e | 56 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 DG |
57 | #if 0 |
58 | /* Not implemented yet */ | |
6caa2bcc | 59 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
26cc6b4e | 60 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
d78d6610 DG |
61 | #else |
62 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
63 | #endif | |
679b4943 | 64 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
26cc6b4e DG |
65 | {0, 0, 0, 0, 0, 0, 0} |
66 | }; | |
67 | ||
68 | /* | |
69 | * usage | |
70 | */ | |
71 | static void usage(FILE *ofp) | |
72 | { | |
272c6a17 | 73 | fprintf(ofp, "usage: lttng disable-channel NAME[,NAME2,...] (-k | -u) [OPTIONS]\n"); |
26cc6b4e | 74 | fprintf(ofp, "\n"); |
32a6298d | 75 | fprintf(ofp, "Options:\n"); |
78f0bacd | 76 | fprintf(ofp, " -h, --help Show this help\n"); |
679b4943 | 77 | fprintf(ofp, " --list-options Simple listing of options\n"); |
32a6298d | 78 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); |
27221701 | 79 | fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n"); |
27221701 | 80 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
26cc6b4e DG |
81 | fprintf(ofp, "\n"); |
82 | } | |
83 | ||
50534d6f JRJ |
84 | static int mi_partial_channel_print(char *channel_name, unsigned int enabled, |
85 | int success) | |
86 | { | |
87 | int ret; | |
88 | ||
89 | assert(writer); | |
90 | assert(channel_name); | |
91 | ||
92 | /* Open channel element */ | |
93 | ret = mi_lttng_writer_open_element(writer, config_element_channel); | |
94 | if (ret) { | |
95 | goto end; | |
96 | } | |
97 | ||
98 | /* Name */ | |
99 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, | |
100 | channel_name); | |
101 | if (ret) { | |
102 | goto end; | |
103 | } | |
104 | ||
105 | /* Enabled ? */ | |
106 | ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled, | |
107 | enabled); | |
108 | if (ret) { | |
109 | goto end; | |
110 | } | |
111 | ||
112 | /* Success ? */ | |
113 | ret = mi_lttng_writer_write_element_bool(writer, | |
9618049b | 114 | mi_lttng_element_success, success); |
50534d6f JRJ |
115 | if (ret) { |
116 | goto end; | |
117 | } | |
118 | ||
119 | /* Closing channel element */ | |
120 | ret = mi_lttng_writer_close_element(writer); | |
121 | ||
122 | end: | |
123 | return ret; | |
124 | } | |
125 | ||
26cc6b4e | 126 | /* |
cd80958d | 127 | * Disabling channel using the lttng API. |
26cc6b4e | 128 | */ |
cd80958d | 129 | static int disable_channels(char *session_name) |
26cc6b4e | 130 | { |
50534d6f JRJ |
131 | int ret = CMD_SUCCESS, warn = 0, success; |
132 | ||
133 | /* Normal case for disable channed is enabled = 0 */ | |
134 | unsigned int enabled = 0; | |
26cc6b4e | 135 | char *channel_name; |
7d29a247 | 136 | struct lttng_domain dom; |
26cc6b4e | 137 | |
441c16a7 MD |
138 | memset(&dom, 0, sizeof(dom)); |
139 | ||
d78d6610 | 140 | /* Create lttng domain */ |
7d29a247 DG |
141 | if (opt_kernel) { |
142 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 143 | } else if (opt_userspace) { |
78f0bacd | 144 | dom.type = LTTNG_DOMAIN_UST; |
78f0bacd | 145 | } else { |
b9dfb167 | 146 | print_missing_domain(); |
d16c1a4c | 147 | ret = CMD_ERROR; |
78f0bacd | 148 | goto error; |
7d29a247 DG |
149 | } |
150 | ||
cd80958d DG |
151 | handle = lttng_create_handle(session_name, &dom); |
152 | if (handle == NULL) { | |
153 | ret = -1; | |
154 | goto error; | |
155 | } | |
156 | ||
50534d6f JRJ |
157 | /* Prepare MI */ |
158 | if (lttng_opt_mi) { | |
159 | /* open a channels element */ | |
160 | ret = mi_lttng_writer_open_element(writer, config_element_channels); | |
161 | if (ret) { | |
162 | ret = CMD_ERROR; | |
163 | goto error; | |
164 | } | |
165 | ||
166 | } | |
167 | ||
26cc6b4e DG |
168 | /* Strip channel list */ |
169 | channel_name = strtok(opt_channels, ","); | |
170 | while (channel_name != NULL) { | |
78f0bacd DG |
171 | DBG("Disabling channel %s", channel_name); |
172 | ||
173 | ret = lttng_disable_channel(handle, channel_name); | |
174 | if (ret < 0) { | |
ae856491 DG |
175 | ERR("Channel %s: %s (session %s)", channel_name, |
176 | lttng_strerror(ret), session_name); | |
177 | warn = 1; | |
50534d6f JRJ |
178 | |
179 | /* | |
180 | * Mi: | |
181 | * We assume that if an error occurred the channel is still active. | |
182 | * This might not be the case but is a good assumption. | |
9618049b JRJ |
183 | * The client should look at the stderr stream |
184 | * for more informations. | |
50534d6f JRJ |
185 | */ |
186 | enabled = 1; | |
187 | success = 0; | |
188 | ||
26cc6b4e | 189 | } else { |
7885e399 | 190 | MSG("%s channel %s disabled for session %s", |
b9dfb167 | 191 | get_domain_str(dom.type), channel_name, session_name); |
50534d6f JRJ |
192 | enabled = 0; |
193 | success = 1; | |
194 | } | |
195 | ||
196 | /* Print the channel */ | |
197 | if (lttng_opt_mi) { | |
198 | ret = mi_partial_channel_print(channel_name, enabled, success); | |
199 | if (ret) { | |
200 | ret = CMD_ERROR; | |
201 | goto error; | |
202 | } | |
26cc6b4e DG |
203 | } |
204 | ||
205 | /* Next channel */ | |
206 | channel_name = strtok(NULL, ","); | |
207 | } | |
208 | ||
ae856491 DG |
209 | ret = CMD_SUCCESS; |
210 | ||
50534d6f JRJ |
211 | /* Close Mi */ |
212 | if (lttng_opt_mi) { | |
213 | /* Close channels element */ | |
214 | ret = mi_lttng_writer_close_element(writer); | |
215 | if (ret) { | |
216 | ret = CMD_ERROR; | |
217 | goto error; | |
218 | } | |
219 | } | |
220 | ||
26cc6b4e | 221 | error: |
50534d6f JRJ |
222 | /* Bypass the warning if a more important error happened */ |
223 | if (!ret && warn) { | |
ae856491 DG |
224 | ret = CMD_WARNING; |
225 | } | |
226 | ||
cd80958d DG |
227 | lttng_destroy_handle(handle); |
228 | ||
26cc6b4e DG |
229 | return ret; |
230 | } | |
231 | ||
232 | /* | |
233 | * cmd_disable_channels | |
234 | * | |
235 | * Disable channel to trace session | |
236 | */ | |
237 | int cmd_disable_channels(int argc, const char **argv) | |
238 | { | |
50534d6f | 239 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
26cc6b4e | 240 | static poptContext pc; |
cd80958d | 241 | char *session_name = NULL; |
26cc6b4e DG |
242 | |
243 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
244 | poptReadDefaultConfig(pc, 0); | |
245 | ||
246 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
247 | switch (opt) { | |
248 | case OPT_HELP: | |
ca1c3607 | 249 | usage(stdout); |
26cc6b4e DG |
250 | goto end; |
251 | case OPT_USERSPACE: | |
252 | opt_userspace = 1; | |
253 | break; | |
679b4943 SM |
254 | case OPT_LIST_OPTIONS: |
255 | list_cmd_options(stdout, long_options); | |
679b4943 | 256 | goto end; |
26cc6b4e DG |
257 | default: |
258 | usage(stderr); | |
259 | ret = CMD_UNDEFINED; | |
260 | goto end; | |
261 | } | |
262 | } | |
263 | ||
264 | opt_channels = (char*) poptGetArg(pc); | |
265 | if (opt_channels == NULL) { | |
266 | ERR("Missing channel name(s).\n"); | |
267 | usage(stderr); | |
ca1c3607 | 268 | ret = CMD_ERROR; |
26cc6b4e DG |
269 | goto end; |
270 | } | |
271 | ||
cd80958d DG |
272 | if (!opt_session_name) { |
273 | session_name = get_session_name(); | |
274 | if (session_name == NULL) { | |
ca1c3607 | 275 | ret = CMD_ERROR; |
cd80958d DG |
276 | goto end; |
277 | } | |
278 | } else { | |
279 | session_name = opt_session_name; | |
280 | } | |
281 | ||
50534d6f JRJ |
282 | /* Mi check */ |
283 | if (lttng_opt_mi) { | |
284 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
285 | if (!writer) { | |
286 | ret = -LTTNG_ERR_NOMEM; | |
287 | goto end; | |
288 | } | |
289 | ||
290 | /* Open command element */ | |
291 | ret = mi_lttng_writer_command_open(writer, | |
292 | mi_lttng_element_command_disable_channel); | |
293 | if (ret) { | |
294 | ret = CMD_ERROR; | |
295 | goto end; | |
296 | } | |
297 | ||
298 | /* Open output element */ | |
299 | ret = mi_lttng_writer_open_element(writer, | |
300 | mi_lttng_element_command_output); | |
301 | if (ret) { | |
302 | ret = CMD_ERROR; | |
303 | goto end; | |
304 | } | |
305 | } | |
306 | ||
307 | command_ret = disable_channels(session_name); | |
308 | if (command_ret) { | |
309 | success = 0; | |
310 | } | |
311 | ||
312 | /* Mi closing */ | |
313 | if (lttng_opt_mi) { | |
314 | /* Close output element */ | |
315 | ret = mi_lttng_writer_close_element(writer); | |
316 | if (ret) { | |
317 | ret = CMD_ERROR; | |
318 | goto end; | |
319 | } | |
320 | ||
321 | /* Success ? */ | |
322 | ret = mi_lttng_writer_write_element_bool(writer, | |
323 | mi_lttng_element_success, success); | |
324 | if (ret) { | |
325 | ret = CMD_ERROR; | |
326 | goto end; | |
327 | } | |
328 | ||
329 | /* Command element close */ | |
330 | ret = mi_lttng_writer_command_close(writer); | |
331 | if (ret) { | |
332 | ret = CMD_ERROR; | |
333 | goto end; | |
334 | } | |
335 | } | |
26cc6b4e DG |
336 | |
337 | end: | |
50534d6f JRJ |
338 | /* Mi clean-up */ |
339 | if (writer && mi_lttng_writer_destroy(writer)) { | |
340 | /* Preserve original error code */ | |
341 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
342 | } | |
343 | ||
5853fd43 DG |
344 | if (!opt_session_name && session_name) { |
345 | free(session_name); | |
346 | } | |
50534d6f JRJ |
347 | |
348 | /* Overwrite ret if an error occurred in disable_channels */ | |
349 | ret = command_ret ? command_ret : ret; | |
350 | ||
ca1c3607 | 351 | poptFreeContext(pc); |
26cc6b4e DG |
352 | return ret; |
353 | } |