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Fix: channel names are not validated
[lttng-tools.git] / src / bin / lttng / commands / enable_channels.c
CommitLineData
d36b8583
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.
d36b8583
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.
d36b8583
DG		 16 */
17
18#define _GNU_SOURCE
6c1c0768 19#define _LGPL_SOURCE
d36b8583
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>
5a0de755 27#include <inttypes.h>
1cb514ce
MD		 28#include <assert.h>
29#include <ctype.h>
d36b8583 30
acc09215
JRJ		 31#include <common/sessiond-comm/sessiond-comm.h>
32#include <common/utils.h>
33#include <common/mi-lttng.h>
34
c399183f 35#include "../command.h"
1cb514ce 36#include "../utils.h"
d36b8583 37
42224349 38
d36b8583 39static char *opt_channels;
5edd7e09 40static int opt_kernel;
5440dc42 41static char *opt_session_name;
d36b8583 42static int opt_userspace;
d78d6610 43static struct lttng_channel chan;
a79d84dd 44static char *opt_output;
7972aab2
DG		 45static int opt_buffer_uid;
46static int opt_buffer_pid;
47static int opt_buffer_global;
d36b8583 48
acc09215
JRJ		 49static struct mi_writer *writer;
50
d36b8583
DG		 51enum {
52 OPT_HELP = 1,
7d29a247
DG		 53 OPT_DISCARD,
54 OPT_OVERWRITE,
55 OPT_SUBBUF_SIZE,
56 OPT_NUM_SUBBUF,
57 OPT_SWITCH_TIMER,
58 OPT_READ_TIMER,
d36b8583 59 OPT_USERSPACE,
679b4943 60 OPT_LIST_OPTIONS,
1624d5b7
JD		 61 OPT_TRACEFILE_SIZE,
62 OPT_TRACEFILE_COUNT,
d36b8583
DG		 63};
64
cd80958d
DG		 65static struct lttng_handle *handle;
66
a79d84dd
DG		 67const char *output_mmap = "mmap";
68const char *output_splice = "splice";
69
d36b8583
DG		 70static struct poptOption long_options[] = {
71 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
72 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 73 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
d36b8583 74 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 75 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
7d29a247
DG		 76 {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0},
77 {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0},
70d0b120 78 {"subbuf-size", 0, POPT_ARG_STRING, 0, OPT_SUBBUF_SIZE, 0, 0},
1b579521
DG		 79 {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0},
80 {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
81 {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
679b4943 82 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
a79d84dd 83 {"output", 0, POPT_ARG_STRING, &opt_output, 0, 0, 0},
7972aab2
DG		 84 {"buffers-uid", 0, POPT_ARG_VAL, &opt_buffer_uid, 1, 0, 0},
85 {"buffers-pid", 0, POPT_ARG_VAL, &opt_buffer_pid, 1, 0, 0},
86 {"buffers-global", 0, POPT_ARG_VAL, &opt_buffer_global, 1, 0, 0},
1624d5b7
JD		 87 {"tracefile-size", 'C', POPT_ARG_INT, 0, OPT_TRACEFILE_SIZE, 0, 0},
88 {"tracefile-count", 'W', POPT_ARG_INT, 0, OPT_TRACEFILE_COUNT, 0, 0},
d36b8583
DG		 89 {0, 0, 0, 0, 0, 0, 0}
90};
91
92/*
93 * usage
94 */
95static void usage(FILE *ofp)
96{
05be3802 97 fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] (-u | -k) [OPTIONS]\n");
d36b8583 98 fprintf(ofp, "\n");
32a6298d 99 fprintf(ofp, "Options:\n");
7d29a247 100 fprintf(ofp, " -h, --help Show this help\n");
679b4943 101 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d 102 fprintf(ofp, " -s, --session NAME Apply to session name\n");
27221701 103 fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
27221701 104 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
7d29a247
DG		 105 fprintf(ofp, "\n");
106 fprintf(ofp, "Channel options:\n");
cabd9892
MD		 107 fprintf(ofp, " --discard Discard event when buffers are full%s\n",
108 DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
109 fprintf(ofp, " --overwrite Flight recorder mode%s\n",
110 DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
70d0b120 111 fprintf(ofp, " --subbuf-size SIZE Subbuffer size in bytes {+k,+M,+G}\n");
0a9c6494
DG		 112 fprintf(ofp, " (default UST uid: %zu, UST pid: %zu, kernel: %zu, metadata: %zu)\n",
113 default_get_ust_uid_channel_subbuf_size(),
114 default_get_ust_pid_channel_subbuf_size(),
115 default_get_kernel_channel_subbuf_size(),
116 default_get_metadata_subbuf_size());
1cb514ce 117 fprintf(ofp, " Rounded up to the next power of 2.\n");
cc62c0c0 118 fprintf(ofp, " --num-subbuf NUM Number of subbufers\n");
0a9c6494
DG		 119 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
120 DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM, DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM,
121 DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM, DEFAULT_METADATA_SUBBUF_NUM);
1cb514ce 122 fprintf(ofp, " Rounded up to the next power of 2.\n");
0a9c6494
DG		 123 fprintf(ofp, " --switch-timer USEC Switch timer interval in usec\n");
124 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
125 DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER, DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER,
126 DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER, DEFAULT_METADATA_SWITCH_TIMER);
127 fprintf(ofp, " --read-timer USEC Read timer interval in usec.\n");
128 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
129 DEFAULT_UST_UID_CHANNEL_READ_TIMER, DEFAULT_UST_UID_CHANNEL_READ_TIMER,
130 DEFAULT_KERNEL_CHANNEL_READ_TIMER, DEFAULT_METADATA_READ_TIMER);
a79d84dd
DG		 131 fprintf(ofp, " --output TYPE Channel output type (Values: %s, %s)\n",
132 output_mmap, output_splice);
0a9c6494
DG		 133 fprintf(ofp, " (default UST uid: %s, UST pid: %s, kernel: %s, metadata: %s)\n",
134 DEFAULT_UST_UID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
135 DEFAULT_UST_PID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
136 DEFAULT_KERNEL_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
137 DEFAULT_METADATA_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice);
05c35276
DG		 138 fprintf(ofp, " --buffers-uid Use per UID buffer (-u only)\n");
139 fprintf(ofp, " --buffers-pid Use per PID buffer (-u only)\n");
7972aab2 140 fprintf(ofp, " --buffers-global Use shared buffer for the whole system (-k only)\n");
1624d5b7 141 fprintf(ofp, " -C, --tracefile-size SIZE\n");
0a9c6494
DG		 142 fprintf(ofp, " Maximum size of each tracefile within a stream (in bytes). 0 means unlimited.\n");
143 fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_SIZE);
c0684a0d
MD		 144 fprintf(ofp, " Note: traces generated with this option may inaccurately report\n");
145 fprintf(ofp, " discarded events as per CTF 1.8.\n");
1624d5b7
JD		 146 fprintf(ofp, " -W, --tracefile-count COUNT\n");
147 fprintf(ofp, " Used in conjunction with -C option, this will limit the number\n");
0a9c6494
DG		 148 fprintf(ofp, " of files created to the specified count. 0 means unlimited.\n");
149 fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_COUNT);
d36b8583
DG		 150 fprintf(ofp, "\n");
151}
152
5edd7e09
DG		 153/*
154 * Set default attributes depending on those already defined from the command
155 * line.
156 */
157static void set_default_attr(struct lttng_domain *dom)
158{
159 struct lttng_channel_attr default_attr;
160
161 /* Set attributes */
162 lttng_channel_set_default_attr(dom, &default_attr);
163
164 if (chan.attr.overwrite == -1) {
165 chan.attr.overwrite = default_attr.overwrite;
166 }
167 if (chan.attr.subbuf_size == -1) {
168 chan.attr.subbuf_size = default_attr.subbuf_size;
169 }
170 if (chan.attr.num_subbuf == -1) {
171 chan.attr.num_subbuf = default_attr.num_subbuf;
172 }
173 if (chan.attr.switch_timer_interval == -1) {
174 chan.attr.switch_timer_interval = default_attr.switch_timer_interval;
175 }
176 if (chan.attr.read_timer_interval == -1) {
177 chan.attr.read_timer_interval = default_attr.read_timer_interval;
178 }
109be0da 179 if ((int) chan.attr.output == -1) {
5edd7e09
DG		 180 chan.attr.output = default_attr.output;
181 }
1624d5b7
JD		 182 if (chan.attr.tracefile_count == -1) {
183 chan.attr.tracefile_count = default_attr.tracefile_count;
184 }
185 if (chan.attr.tracefile_size == -1) {
186 chan.attr.tracefile_size = default_attr.tracefile_size;
187 }
5edd7e09
DG		 188}
189
d36b8583 190/*
0fdd1e2c 191 * Adding channel using the lttng API.
d36b8583 192 */
cd80958d 193static int enable_channel(char *session_name)
d36b8583 194{
acc09215 195 int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0;
d36b8583 196 char *channel_name;
7d29a247 197 struct lttng_domain dom;
d36b8583 198
441c16a7
MD		 199 memset(&dom, 0, sizeof(dom));
200
d78d6610 201 /* Create lttng domain */
7d29a247
DG		 202 if (opt_kernel) {
203 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 204 dom.buf_type = LTTNG_BUFFER_GLOBAL;
88c5f0d8
DG		 205 if (opt_buffer_uid || opt_buffer_pid) {
206 ERR("Buffer type not supported for domain -k");
207 ret = CMD_ERROR;
208 goto error;
209 }
d78d6610 210 } else if (opt_userspace) {
f6a9efaa 211 dom.type = LTTNG_DOMAIN_UST;
8692d4e5
DG		 212 if (opt_buffer_pid) {
213 dom.buf_type = LTTNG_BUFFER_PER_PID;
7972aab2 214 } else {
88c5f0d8
DG		 215 if (opt_buffer_global) {
216 ERR("Buffer type not supported for domain -u");
217 ret = CMD_ERROR;
218 goto error;
219 }
8692d4e5 220 dom.buf_type = LTTNG_BUFFER_PER_UID;
7972aab2 221 }
0fdd1e2c 222 } else {
b9dfb167 223 print_missing_domain();
d16c1a4c 224 ret = CMD_ERROR;
0fdd1e2c 225 goto error;
7d29a247
DG		 226 }
227
5edd7e09
DG		 228 set_default_attr(&dom);
229
d16dee89
DG		 230 if (chan.attr.tracefile_size == 0 && chan.attr.tracefile_count) {
231 ERR("Missing option --tracefile-size. "
232 "A file count without a size won't do anything.");
233 ret = CMD_ERROR;
234 goto error;
235 }
236
1624d5b7
JD		 237 if ((chan.attr.tracefile_size > 0) &&
238 (chan.attr.tracefile_size < chan.attr.subbuf_size)) {
de65565a 239 WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")",
1624d5b7 240 chan.attr.tracefile_size, chan.attr.subbuf_size);
de65565a 241 chan.attr.tracefile_size = chan.attr.subbuf_size;
1624d5b7
JD		 242 }
243
a79d84dd
DG		 244 /* Setting channel output */
245 if (opt_output) {
246 if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) {
247 chan.attr.output = LTTNG_EVENT_MMAP;
248 } else if (!strncmp(output_splice, opt_output, strlen(output_splice))) {
249 chan.attr.output = LTTNG_EVENT_SPLICE;
250 } else {
251 ERR("Unknown output type %s. Possible values are: %s, %s\n",
252 opt_output, output_mmap, output_splice);
253 usage(stderr);
254 ret = CMD_ERROR;
255 goto error;
256 }
257 }
258
cd80958d
DG		 259 handle = lttng_create_handle(session_name, &dom);
260 if (handle == NULL) {
261 ret = -1;
262 goto error;
263 }
264
acc09215
JRJ		 265 /* Mi open channels element */
266 if (lttng_opt_mi) {
267 assert(writer);
268 ret = mi_lttng_channels_open(writer);
269 if (ret) {
270 ret = CMD_ERROR;
271 goto error;
272 }
273 }
274
0fdd1e2c 275 /* Strip channel list (format: chan1,chan2,...) */
d36b8583
DG		 276 channel_name = strtok(opt_channels, ",");
277 while (channel_name != NULL) {
1f345e94
PP		 278 /* Validate channel name's length */
279 if (strlen(channel_name) >= NAME_MAX) {
280 ERR("Channel name is too long (max. %zu characters)",
281 sizeof(chan.name) - 1);
282 error = 1;
283 goto skip_enable;
284 }
285
286 /* Copy channel name */
287 strcpy(chan.name, channel_name);
0fdd1e2c
DG		 288
289 DBG("Enabling channel %s", channel_name);
290
291 ret = lttng_enable_channel(handle, &chan);
292 if (ret < 0) {
acc09215 293 success = 0;
42224349 294 switch (-ret) {
f73fabfd
DG		 295 case LTTNG_ERR_KERN_CHAN_EXIST:
296 case LTTNG_ERR_UST_CHAN_EXIST:
b9dfb167 297 case LTTNG_ERR_CHAN_EXIST:
88c5f0d8 298 WARN("Channel %s: %s (session %s)", channel_name,
42224349 299 lttng_strerror(ret), session_name);
acc09215
JRJ		 300 warn = 1;
301 break;
1f345e94
PP		 302 case LTTNG_ERR_INVALID_CHANNEL_NAME:
303 ERR("Invalid channel name: \"%s\". "
304 "Channel names may not start with '.', and "
305 "may not contain '/'.", channel_name);
306 error = 1;
307 break;
42224349
DG		 308 default:
309 ERR("Channel %s: %s (session %s)", channel_name,
310 lttng_strerror(ret), session_name);
acc09215 311 error = 1;
42224349
DG		 312 break;
313 }
d36b8583 314 } else {
7885e399 315 MSG("%s channel %s enabled for session %s",
b9dfb167 316 get_domain_str(dom.type), channel_name, session_name);
acc09215
JRJ		 317 success = 1;
318 }
319
1f345e94 320skip_enable:
acc09215
JRJ		 321 if (lttng_opt_mi) {
322 /* Mi print the channel element and leave it open */
323 ret = mi_lttng_channel(writer, &chan, 1);
324 if (ret) {
325 ret = CMD_ERROR;
326 goto error;
327 }
328
329 /* Individual Success ? */
330 ret = mi_lttng_writer_write_element_bool(writer,
331 mi_lttng_element_command_success, success);
332 if (ret) {
333 ret = CMD_ERROR;
334 goto error;
335 }
336
337 /* Close channel element */
338 ret = mi_lttng_writer_close_element(writer);
339 if (ret) {
340 ret = CMD_ERROR;
341 goto error;
342 }
d36b8583
DG		 343 }
344
acc09215 345 /* Next channel */
d36b8583
DG		 346 channel_name = strtok(NULL, ",");
347 }
348
acc09215
JRJ		 349 if (lttng_opt_mi) {
350 /* Close channels element */
351 ret = mi_lttng_writer_close_element(writer);
352 if (ret) {
353 ret = CMD_ERROR;
354 goto error;
355 }
356 }
357
ae856491
DG		 358 ret = CMD_SUCCESS;
359
d36b8583 360error:
acc09215
JRJ		 361 /* If more important error happen bypass the warning */
362 if (!ret && warn) {
ae856491
DG		 363 ret = CMD_WARNING;
364 }
acc09215
JRJ		 365 /* If more important error happen bypass the warning */
366 if (!ret && error) {
367 ret = CMD_ERROR;
368 }
ae856491 369
cd80958d
DG		 370 lttng_destroy_handle(handle);
371
d36b8583
DG		 372 return ret;
373}
374
375/*
0fdd1e2c 376 * Default value for channel configuration.
7d29a247
DG		 377 */
378static void init_channel_config(void)
379{
5edd7e09
DG		 380 /*
381 * Put -1 everywhere so we can identify those set by the command line and
382 * those needed to be set by the default values.
383 */
384 memset(&chan.attr, -1, sizeof(chan.attr));
7d29a247
DG		 385}
386
387/*
0fdd1e2c 388 * Add channel to trace session
d36b8583
DG		 389 */
390int cmd_enable_channels(int argc, const char **argv)
391{
acc09215 392 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
d36b8583 393 static poptContext pc;
cd80958d 394 char *session_name = NULL;
70d0b120 395 char *opt_arg = NULL;
d36b8583 396
7d29a247
DG		 397 init_channel_config();
398
d36b8583
DG		 399 pc = poptGetContext(NULL, argc, argv, long_options, 0);
400 poptReadDefaultConfig(pc, 0);
401
402 while ((opt = poptGetNextOpt(pc)) != -1) {
403 switch (opt) {
404 case OPT_HELP:
ca1c3607 405 usage(stdout);
d36b8583 406 goto end;
7d29a247
DG		 407 case OPT_DISCARD:
408 chan.attr.overwrite = 0;
409 DBG("Channel set to discard");
410 break;
411 case OPT_OVERWRITE:
412 chan.attr.overwrite = 1;
413 DBG("Channel set to overwrite");
414 break;
415 case OPT_SUBBUF_SIZE:
1cb514ce
MD		 416 {
417 uint64_t rounded_size;
418 int order;
419
70d0b120
SM		 420 /* Parse the size */
421 opt_arg = poptGetOptArg(pc);
1cb514ce
MD		 422 if (utils_parse_size_suffix(opt_arg, &chan.attr.subbuf_size) < 0 || !chan.attr.subbuf_size) {
423 ERR("Wrong value in --subbuf-size parameter: %s", opt_arg);
70d0b120
SM		 424 ret = CMD_ERROR;
425 goto end;
426 }
427
1cb514ce
MD		 428 order = get_count_order_u64(chan.attr.subbuf_size);
429 assert(order >= 0);
430 rounded_size = 1ULL << order;
06c0da96
DG		 431 if (rounded_size < chan.attr.subbuf_size) {
432 ERR("The subbuf size (%" PRIu64 ") is rounded and overflows!",
433 chan.attr.subbuf_size);
434 ret = CMD_ERROR;
435 goto end;
436 }
437
1cb514ce
MD		 438 if (rounded_size != chan.attr.subbuf_size) {
439 WARN("The subbuf size (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
440 chan.attr.subbuf_size, rounded_size);
441 chan.attr.subbuf_size = rounded_size;
70d0b120
SM		 442 }
443
1cb514ce
MD		 444 /* Should now be power of 2 */
445 assert(!((chan.attr.subbuf_size - 1) & chan.attr.subbuf_size));
446
5a0de755 447 DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size);
7d29a247 448 break;
1cb514ce 449 }
7d29a247 450 case OPT_NUM_SUBBUF:
1cb514ce
MD		 451 {
452 uint64_t rounded_size;
453 int order;
454
16068db5 455 errno = 0;
1cb514ce
MD		 456 opt_arg = poptGetOptArg(pc);
457 chan.attr.num_subbuf = strtoull(opt_arg, NULL, 0);
458 if (errno != 0 || !chan.attr.num_subbuf || !isdigit(opt_arg[0])) {
459 ERR("Wrong value in --num-subbuf parameter: %s", opt_arg);
16068db5
MD		 460 ret = CMD_ERROR;
461 goto end;
462 }
463
1cb514ce
MD		 464 order = get_count_order_u64(chan.attr.num_subbuf);
465 assert(order >= 0);
466 rounded_size = 1ULL << order;
e123b80c 467 if (rounded_size < chan.attr.num_subbuf) {
06c0da96
DG		 468 ERR("The number of subbuffers (%" PRIu64 ") is rounded and overflows!",
469 chan.attr.num_subbuf);
470 ret = CMD_ERROR;
471 goto end;
472 }
473
1cb514ce
MD		 474 if (rounded_size != chan.attr.num_subbuf) {
475 WARN("The number of subbuffers (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
476 chan.attr.num_subbuf, rounded_size);
477 chan.attr.num_subbuf = rounded_size;
478 }
479
480 /* Should now be power of 2 */
481 assert(!((chan.attr.num_subbuf - 1) & chan.attr.num_subbuf));
482
5a0de755 483 DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf);
7d29a247 484 break;
1cb514ce 485 }
7d29a247 486 case OPT_SWITCH_TIMER:
16068db5
MD		 487 {
488 unsigned long v;
489
490 errno = 0;
1cb514ce
MD		 491 opt_arg = poptGetOptArg(pc);
492 v = strtoul(opt_arg, NULL, 0);
493 if (errno != 0 || !isdigit(opt_arg[0])) {
494 ERR("Wrong value in --switch-timer parameter: %s", opt_arg);
16068db5
MD		 495 ret = CMD_ERROR;
496 goto end;
497 }
498 if (v != (uint32_t) v) {
499 ERR("32-bit overflow in --switch-timer parameter: %s", opt_arg);
500 ret = CMD_ERROR;
501 goto end;
502 }
503 chan.attr.switch_timer_interval = (uint32_t) v;
7d29a247
DG		 504 DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
505 break;
16068db5 506 }
7d29a247 507 case OPT_READ_TIMER:
16068db5
MD		 508 {
509 unsigned long v;
510
511 errno = 0;
1cb514ce
MD		 512 opt_arg = poptGetOptArg(pc);
513 v = strtoul(opt_arg, NULL, 0);
514 if (errno != 0 || !isdigit(opt_arg[0])) {
515 ERR("Wrong value in --read-timer parameter: %s", opt_arg);
16068db5
MD		 516 ret = CMD_ERROR;
517 goto end;
518 }
519 if (v != (uint32_t) v) {
520 ERR("32-bit overflow in --read-timer parameter: %s", opt_arg);
521 ret = CMD_ERROR;
522 goto end;
523 }
524 chan.attr.read_timer_interval = (uint32_t) v;
7d29a247 525 DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
d36b8583 526 break;
16068db5 527 }
eeac7d46
MD		 528 case OPT_USERSPACE:
529 opt_userspace = 1;
eeac7d46 530 break;
1624d5b7 531 case OPT_TRACEFILE_SIZE:
1cb514ce 532 opt_arg = poptGetOptArg(pc);
16068db5 533 if (utils_parse_size_suffix(opt_arg, &chan.attr.tracefile_size) < 0) {
1cb514ce 534 ERR("Wrong value in --tracefile-size parameter: %s", opt_arg);
16068db5
MD		 535 ret = CMD_ERROR;
536 goto end;
537 }
1624d5b7
JD		 538 DBG("Maximum tracefile size set to %" PRIu64,
539 chan.attr.tracefile_size);
540 break;
541 case OPT_TRACEFILE_COUNT:
16068db5
MD		 542 {
543 unsigned long v;
544
545 errno = 0;
1cb514ce
MD		 546 opt_arg = poptGetOptArg(pc);
547 v = strtoul(opt_arg, NULL, 0);
548 if (errno != 0 || !isdigit(opt_arg[0])) {
549 ERR("Wrong value in --tracefile-count parameter: %s", opt_arg);
16068db5
MD		 550 ret = CMD_ERROR;
551 goto end;
552 }
553 if (v != (uint32_t) v) {
554 ERR("32-bit overflow in --tracefile-count parameter: %s", opt_arg);
555 ret = CMD_ERROR;
556 goto end;
557 }
558 chan.attr.tracefile_count = (uint32_t) v;
1624d5b7
JD		 559 DBG("Maximum tracefile count set to %" PRIu64,
560 chan.attr.tracefile_count);
561 break;
16068db5 562 }
679b4943
SM		 563 case OPT_LIST_OPTIONS:
564 list_cmd_options(stdout, long_options);
679b4943 565 goto end;
d36b8583
DG		 566 default:
567 usage(stderr);
568 ret = CMD_UNDEFINED;
569 goto end;
570 }
571 }
572
acc09215
JRJ		 573 /* Mi check */
574 if (lttng_opt_mi) {
575 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
576 if (!writer) {
577 ret = -LTTNG_ERR_NOMEM;
578 goto end;
579 }
580
581 /* Open command element */
582 ret = mi_lttng_writer_command_open(writer,
583 mi_lttng_element_command_enable_channels);
584 if (ret) {
585 ret = CMD_ERROR;
586 goto end;
587 }
588
589 /* Open output element */
590 ret = mi_lttng_writer_open_element(writer,
591 mi_lttng_element_command_output);
592 if (ret) {
593 ret = CMD_ERROR;
594 goto end;
595 }
596 }
597
d36b8583
DG		 598 opt_channels = (char*) poptGetArg(pc);
599 if (opt_channels == NULL) {
7d29a247 600 ERR("Missing channel name.\n");
d36b8583 601 usage(stderr);
ca1c3607 602 ret = CMD_ERROR;
acc09215
JRJ		 603 success = 0;
604 goto mi_closing;
d36b8583
DG		 605 }
606
cd80958d
DG		 607 if (!opt_session_name) {
608 session_name = get_session_name();
609 if (session_name == NULL) {
acc09215
JRJ		 610 command_ret = CMD_ERROR;
611 success = 0;
612 goto mi_closing;
cd80958d
DG		 613 }
614 } else {
615 session_name = opt_session_name;
616 }
617
acc09215
JRJ		 618 command_ret = enable_channel(session_name);
619 if (command_ret) {
620 success = 0;
621 }
622
623mi_closing:
624 /* Mi closing */
625 if (lttng_opt_mi) {
626 /* Close output element */
627 ret = mi_lttng_writer_close_element(writer);
628 if (ret) {
629 goto end;
630 }
631
632 /* Success ? */
633 ret = mi_lttng_writer_write_element_bool(writer,
634 mi_lttng_element_command_success, success);
635 if (ret) {
636 goto end;
637 }
638
639 /* Command element close */
640 ret = mi_lttng_writer_command_close(writer);
641 if (ret) {
642 goto end;
643 }
644 }
d36b8583
DG		 645
646end:
acc09215
JRJ		 647 /* Mi clean-up */
648 if (writer && mi_lttng_writer_destroy(writer)) {
649 /* Preserve original error code */
650 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
651 }
652
5853fd43
DG		 653 if (!opt_session_name && session_name) {
654 free(session_name);
655 }
acc09215
JRJ		 656
657 /* Overwrite ret if an error occurred when enable_channel */
658 ret = command_ret ? command_ret : ret;
ca1c3607 659 poptFreeContext(pc);
d36b8583
DG		 660 return ret;
661}
LTTng 2.0 tools and control repository
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