Commit | Line | Data |
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e953ef25 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. | |
e953ef25 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. | |
e953ef25 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> | |
e4d484a5 JRJ |
26 | #include <assert.h> |
27 | ||
28 | #include <common/mi-lttng.h> | |
e953ef25 | 29 | |
c399183f | 30 | #include "../command.h" |
e953ef25 DG |
31 | |
32 | static char *opt_event_list; | |
9730260e | 33 | static int opt_kernel; |
e953ef25 | 34 | static char *opt_channel_name; |
5440dc42 | 35 | static char *opt_session_name; |
e953ef25 DG |
36 | static int opt_userspace; |
37 | static int opt_disable_all; | |
b9dfb167 | 38 | static int opt_jul; |
d78d6610 DG |
39 | #if 0 |
40 | /* Not implemented yet */ | |
41 | static char *opt_cmd_name; | |
e953ef25 | 42 | static pid_t opt_pid; |
d78d6610 | 43 | #endif |
e953ef25 DG |
44 | |
45 | enum { | |
46 | OPT_HELP = 1, | |
47 | OPT_USERSPACE, | |
679b4943 | 48 | OPT_LIST_OPTIONS, |
e953ef25 DG |
49 | }; |
50 | ||
cd80958d | 51 | static struct lttng_handle *handle; |
e4d484a5 | 52 | static struct mi_writer *writer; |
cd80958d | 53 | |
e953ef25 DG |
54 | static struct poptOption long_options[] = { |
55 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
56 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
5440dc42 | 57 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
e953ef25 DG |
58 | {"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0}, |
59 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, | |
b9dfb167 | 60 | {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0}, |
e953ef25 | 61 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
d78d6610 DG |
62 | #if 0 |
63 | /* Not implemented yet */ | |
6caa2bcc | 64 | {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, |
e953ef25 | 65 | {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, |
d78d6610 DG |
66 | #else |
67 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, | |
68 | #endif | |
679b4943 | 69 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
e953ef25 DG |
70 | {0, 0, 0, 0, 0, 0, 0} |
71 | }; | |
72 | ||
73 | /* | |
74 | * usage | |
75 | */ | |
76 | static void usage(FILE *ofp) | |
77 | { | |
c138a39b | 78 | fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] (-k | -u) [OPTIONS]\n"); |
e953ef25 | 79 | fprintf(ofp, "\n"); |
32a6298d | 80 | fprintf(ofp, "Options:\n"); |
e953ef25 | 81 | fprintf(ofp, " -h, --help Show this help\n"); |
679b4943 | 82 | fprintf(ofp, " --list-options Simple listing of options\n"); |
32a6298d DG |
83 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); |
84 | fprintf(ofp, " -c, --channel NAME Apply to this channel\n"); | |
9730260e | 85 | fprintf(ofp, " -a, --all-events Disable all tracepoints\n"); |
e953ef25 | 86 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); |
27221701 | 87 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
b9dfb167 | 88 | fprintf(ofp, " -j, --jul Apply for Java application using JUL\n"); |
e953ef25 DG |
89 | fprintf(ofp, "\n"); |
90 | } | |
91 | ||
85076754 MD |
92 | static |
93 | const char *print_channel_name(const char *name) | |
94 | { | |
95 | return name ? : DEFAULT_CHANNEL_NAME; | |
96 | } | |
97 | ||
98 | static | |
99 | const char *print_raw_channel_name(const char *name) | |
100 | { | |
101 | return name ? : "<default>"; | |
102 | } | |
103 | ||
e4d484a5 JRJ |
104 | /* Mi print a partial event. |
105 | * enabled is 0 or 1 | |
106 | * success is 0 or 1 | |
107 | */ | |
108 | static int mi_print_event(char *event_name, int enabled, int success) | |
109 | { | |
110 | int ret; | |
111 | ||
112 | assert(writer); | |
113 | assert(event_name); | |
114 | ||
115 | /* Open event element */ | |
116 | ret = mi_lttng_writer_open_element(writer, config_element_event); | |
117 | if (ret) { | |
118 | goto end; | |
119 | } | |
120 | ||
121 | /* Print the name of event */ | |
122 | ret = mi_lttng_writer_write_element_string(writer, | |
123 | config_element_name, event_name); | |
124 | if (ret) { | |
125 | goto end; | |
126 | } | |
127 | ||
128 | /* Print enabled ? */ | |
129 | ret = mi_lttng_writer_write_element_bool(writer, | |
130 | config_element_enabled, enabled); | |
131 | if (ret) { | |
132 | goto end; | |
133 | } | |
134 | ||
135 | /* Success ? */ | |
136 | ret = mi_lttng_writer_write_element_bool(writer, | |
137 | mi_lttng_element_command_success, success); | |
138 | if (ret) { | |
139 | goto end; | |
140 | } | |
141 | ||
142 | /* Close event element */ | |
143 | ret = mi_lttng_writer_close_element(writer); | |
144 | end: | |
145 | return ret; | |
146 | } | |
147 | ||
e953ef25 DG |
148 | /* |
149 | * disable_events | |
150 | * | |
151 | * Disabling event using the lttng API. | |
152 | */ | |
cd80958d | 153 | static int disable_events(char *session_name) |
e953ef25 | 154 | { |
e4d484a5 JRJ |
155 | int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS; |
156 | int enabled = 1, success = 1; | |
b73d0b29 | 157 | char *event_name, *channel_name = NULL; |
7d29a247 | 158 | struct lttng_domain dom; |
e953ef25 | 159 | |
441c16a7 MD |
160 | memset(&dom, 0, sizeof(dom)); |
161 | ||
d78d6610 | 162 | /* Create lttng domain */ |
7d29a247 DG |
163 | if (opt_kernel) { |
164 | dom.type = LTTNG_DOMAIN_KERNEL; | |
d78d6610 | 165 | } else if (opt_userspace) { |
9730260e | 166 | dom.type = LTTNG_DOMAIN_UST; |
b9dfb167 DG |
167 | } else if (opt_jul) { |
168 | dom.type = LTTNG_DOMAIN_JUL; | |
9730260e | 169 | } else { |
b9dfb167 | 170 | print_missing_domain(); |
d16c1a4c | 171 | ret = CMD_ERROR; |
9730260e | 172 | goto error; |
7d29a247 DG |
173 | } |
174 | ||
85076754 | 175 | channel_name = opt_channel_name; |
ae856491 | 176 | |
cd80958d DG |
177 | handle = lttng_create_handle(session_name, &dom); |
178 | if (handle == NULL) { | |
179 | ret = -1; | |
180 | goto error; | |
181 | } | |
182 | ||
e4d484a5 JRJ |
183 | /* Mi print the channel and open the events element */ |
184 | if (lttng_opt_mi) { | |
185 | ret = mi_lttng_writer_open_element(writer, config_element_channel); | |
186 | if (ret) { | |
187 | ret = CMD_ERROR; | |
188 | goto end; | |
e953ef25 DG |
189 | } |
190 | ||
e4d484a5 JRJ |
191 | ret = mi_lttng_writer_write_element_string(writer, |
192 | config_element_name, print_channel_name(channel_name)); | |
193 | if (ret) { | |
194 | ret = CMD_ERROR; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | /* Open events element */ | |
199 | ret = mi_lttng_writer_open_element(writer, config_element_events); | |
200 | if (ret) { | |
201 | ret = CMD_ERROR; | |
202 | goto end; | |
203 | } | |
e953ef25 DG |
204 | } |
205 | ||
e4d484a5 JRJ |
206 | if (opt_disable_all) { |
207 | command_ret = lttng_disable_event(handle, NULL, channel_name); | |
208 | if (command_ret < 0) { | |
209 | ERR("%s", lttng_strerror(command_ret)); | |
210 | enabled = 1; | |
211 | success = 0; | |
212 | ||
9730260e | 213 | } else { |
e4d484a5 JRJ |
214 | enabled = 0; |
215 | success = 1; | |
216 | MSG("All %s events are disabled in channel %s", | |
217 | get_domain_str(dom.type), print_channel_name(channel_name)); | |
9730260e DG |
218 | } |
219 | ||
e4d484a5 JRJ |
220 | if (lttng_opt_mi) { |
221 | ret = mi_print_event("*", enabled, success); | |
222 | if (ret) { | |
223 | ret = CMD_ERROR; | |
224 | goto error; | |
225 | } | |
226 | } | |
227 | } else { | |
228 | /* Strip event list */ | |
229 | event_name = strtok(opt_event_list, ","); | |
230 | while (event_name != NULL) { | |
231 | DBG("Disabling event %s", event_name); | |
e953ef25 | 232 | |
e4d484a5 JRJ |
233 | command_ret = lttng_disable_event(handle, event_name, channel_name); |
234 | if (command_ret < 0) { | |
235 | ERR("Event %s: %s (channel %s, session %s)", event_name, | |
236 | lttng_strerror(command_ret), | |
237 | command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME | |
238 | ? print_raw_channel_name(channel_name) | |
239 | : print_channel_name(channel_name), | |
240 | session_name); | |
241 | warn = 1; | |
242 | success = 0; | |
243 | /* | |
244 | * If an error occurred we assume that | |
245 | * the event is still enabled. | |
246 | */ | |
247 | enabled = 1; | |
248 | } else { | |
249 | MSG("%s event %s disabled in channel %s for session %s", | |
250 | get_domain_str(dom.type), event_name, | |
251 | print_channel_name(channel_name), | |
252 | session_name); | |
253 | success = 1; | |
254 | enabled = 0; | |
255 | } | |
256 | ||
257 | if (lttng_opt_mi) { | |
258 | ret = mi_print_event(event_name, enabled, success); | |
259 | if (ret) { | |
260 | ret = CMD_ERROR; | |
261 | goto error; | |
262 | } | |
263 | } | |
264 | ||
265 | /* Next event */ | |
266 | event_name = strtok(NULL, ","); | |
267 | } | |
268 | } | |
ae856491 | 269 | |
9730260e | 270 | end: |
e4d484a5 JRJ |
271 | if (lttng_opt_mi) { |
272 | /* Close events element and channel element */ | |
273 | ret = mi_lttng_close_multi_element(writer, 2); | |
274 | if (ret) { | |
275 | ret = CMD_ERROR; | |
276 | } | |
277 | } | |
e953ef25 | 278 | error: |
e4d484a5 JRJ |
279 | /* if there is already an error preserve it */ |
280 | if (warn && !ret) { | |
ae856491 DG |
281 | ret = CMD_WARNING; |
282 | } | |
cd80958d | 283 | |
e4d484a5 JRJ |
284 | /* Overwrite ret if an error occurred */ |
285 | ret = command_ret ? command_ret : ret; | |
286 | ||
287 | lttng_destroy_handle(handle); | |
e953ef25 DG |
288 | return ret; |
289 | } | |
290 | ||
291 | /* | |
292 | * cmd_disable_events | |
293 | * | |
294 | * Disable event to trace session | |
295 | */ | |
296 | int cmd_disable_events(int argc, const char **argv) | |
297 | { | |
e4d484a5 | 298 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
e953ef25 | 299 | static poptContext pc; |
cd80958d | 300 | char *session_name = NULL; |
e953ef25 DG |
301 | |
302 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
303 | poptReadDefaultConfig(pc, 0); | |
304 | ||
305 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
306 | switch (opt) { | |
307 | case OPT_HELP: | |
ca1c3607 | 308 | usage(stdout); |
e953ef25 DG |
309 | goto end; |
310 | case OPT_USERSPACE: | |
311 | opt_userspace = 1; | |
e953ef25 | 312 | break; |
679b4943 SM |
313 | case OPT_LIST_OPTIONS: |
314 | list_cmd_options(stdout, long_options); | |
679b4943 | 315 | goto end; |
e953ef25 DG |
316 | default: |
317 | usage(stderr); | |
318 | ret = CMD_UNDEFINED; | |
319 | goto end; | |
320 | } | |
321 | } | |
322 | ||
323 | opt_event_list = (char*) poptGetArg(pc); | |
324 | if (opt_event_list == NULL && opt_disable_all == 0) { | |
325 | ERR("Missing event name(s).\n"); | |
326 | usage(stderr); | |
ca1c3607 | 327 | ret = CMD_ERROR; |
e953ef25 DG |
328 | goto end; |
329 | } | |
330 | ||
cd80958d DG |
331 | if (!opt_session_name) { |
332 | session_name = get_session_name(); | |
333 | if (session_name == NULL) { | |
ca1c3607 | 334 | ret = CMD_ERROR; |
cd80958d DG |
335 | goto end; |
336 | } | |
337 | } else { | |
338 | session_name = opt_session_name; | |
339 | } | |
340 | ||
e4d484a5 JRJ |
341 | /* Mi check */ |
342 | if (lttng_opt_mi) { | |
343 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
344 | if (!writer) { | |
345 | ret = -LTTNG_ERR_NOMEM; | |
346 | goto end; | |
347 | } | |
348 | ||
349 | /* Open command element */ | |
350 | ret = mi_lttng_writer_command_open(writer, | |
351 | mi_lttng_element_command_disable_event); | |
352 | if (ret) { | |
353 | ret = CMD_ERROR; | |
354 | goto end; | |
355 | } | |
356 | ||
357 | /* Open output element */ | |
358 | ret = mi_lttng_writer_open_element(writer, | |
359 | mi_lttng_element_command_output); | |
360 | if (ret) { | |
361 | ret = CMD_ERROR; | |
362 | goto end; | |
363 | } | |
364 | } | |
365 | ||
366 | command_ret = disable_events(session_name); | |
367 | if (command_ret) { | |
368 | success = 0; | |
369 | } | |
370 | ||
371 | /* Mi closing */ | |
372 | if (lttng_opt_mi) { | |
373 | /* Close output element */ | |
374 | ret = mi_lttng_writer_close_element(writer); | |
375 | if (ret) { | |
376 | ret = CMD_ERROR; | |
377 | goto end; | |
378 | } | |
379 | ||
380 | ret = mi_lttng_writer_write_element_bool(writer, | |
381 | mi_lttng_element_command_success, success); | |
382 | if (ret) { | |
383 | ret = CMD_ERROR; | |
384 | goto end; | |
385 | } | |
386 | ||
387 | /* Command element close */ | |
388 | ret = mi_lttng_writer_command_close(writer); | |
389 | if (ret) { | |
390 | ret = CMD_ERROR; | |
391 | goto end; | |
392 | } | |
393 | } | |
e953ef25 DG |
394 | |
395 | end: | |
5853fd43 DG |
396 | if (!opt_session_name && session_name) { |
397 | free(session_name); | |
398 | } | |
e4d484a5 JRJ |
399 | |
400 | /* Mi clean-up */ | |
401 | if (writer && mi_lttng_writer_destroy(writer)) { | |
402 | /* Preserve original error code */ | |
403 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
404 | } | |
405 | ||
406 | /* Overwrite ret if an error occured in disable_events */ | |
407 | ret = command_ret ? command_ret : ret; | |
408 | ||
ca1c3607 | 409 | poptFreeContext(pc); |
e953ef25 DG |
410 | return ret; |
411 | } |