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lttng add-context: add --list option
[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
6c1c0768 18#define _LGPL_SOURCE
d36b8583
DG		 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>
5a0de755 26#include <inttypes.h>
1cb514ce
MD		 27#include <assert.h>
28#include <ctype.h>
d36b8583 29
acc09215
JRJ		 30#include <common/sessiond-comm/sessiond-comm.h>
31#include <common/utils.h>
32#include <common/mi-lttng.h>
33
c399183f 34#include "../command.h"
1cb514ce 35#include "../utils.h"
d36b8583 36
42224349 37
d36b8583 38static char *opt_channels;
5edd7e09 39static int opt_kernel;
5440dc42 40static char *opt_session_name;
d36b8583 41static int opt_userspace;
d78d6610 42static struct lttng_channel chan;
a79d84dd 43static char *opt_output;
7972aab2
DG		 44static int opt_buffer_uid;
45static int opt_buffer_pid;
46static int opt_buffer_global;
d36b8583 47
acc09215
JRJ		 48static struct mi_writer *writer;
49
d36b8583
DG		 50enum {
51 OPT_HELP = 1,
7d29a247
DG		 52 OPT_DISCARD,
53 OPT_OVERWRITE,
54 OPT_SUBBUF_SIZE,
55 OPT_NUM_SUBBUF,
56 OPT_SWITCH_TIMER,
57 OPT_READ_TIMER,
d36b8583 58 OPT_USERSPACE,
679b4943 59 OPT_LIST_OPTIONS,
1624d5b7
JD		 60 OPT_TRACEFILE_SIZE,
61 OPT_TRACEFILE_COUNT,
d36b8583
DG		 62};
63
cd80958d
DG		 64static struct lttng_handle *handle;
65
a79d84dd
DG		 66const char *output_mmap = "mmap";
67const char *output_splice = "splice";
68
d36b8583
DG		 69static struct poptOption long_options[] = {
70 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
71 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 72 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
d36b8583 73 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 74 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
7d29a247
DG		 75 {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0},
76 {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0},
70d0b120 77 {"subbuf-size", 0, POPT_ARG_STRING, 0, OPT_SUBBUF_SIZE, 0, 0},
1b579521
DG		 78 {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0},
79 {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
80 {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
679b4943 81 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
a79d84dd 82 {"output", 0, POPT_ARG_STRING, &opt_output, 0, 0, 0},
7972aab2
DG		 83 {"buffers-uid", 0, POPT_ARG_VAL, &opt_buffer_uid, 1, 0, 0},
84 {"buffers-pid", 0, POPT_ARG_VAL, &opt_buffer_pid, 1, 0, 0},
85 {"buffers-global", 0, POPT_ARG_VAL, &opt_buffer_global, 1, 0, 0},
1624d5b7
JD		 86 {"tracefile-size", 'C', POPT_ARG_INT, 0, OPT_TRACEFILE_SIZE, 0, 0},
87 {"tracefile-count", 'W', POPT_ARG_INT, 0, OPT_TRACEFILE_COUNT, 0, 0},
d36b8583
DG		 88 {0, 0, 0, 0, 0, 0, 0}
89};
90
91/*
92 * usage
93 */
94static void usage(FILE *ofp)
95{
05be3802 96 fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] (-u | -k) [OPTIONS]\n");
d36b8583 97 fprintf(ofp, "\n");
32a6298d 98 fprintf(ofp, "Options:\n");
7d29a247 99 fprintf(ofp, " -h, --help Show this help\n");
679b4943 100 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d 101 fprintf(ofp, " -s, --session NAME Apply to session name\n");
27221701 102 fprintf(ofp, " -k, --kernel Apply to the kernel tracer\n");
27221701 103 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
7d29a247
DG		 104 fprintf(ofp, "\n");
105 fprintf(ofp, "Channel options:\n");
cabd9892
MD		 106 fprintf(ofp, " --discard Discard event when buffers are full%s\n",
107 DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
108 fprintf(ofp, " --overwrite Flight recorder mode%s\n",
109 DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
70d0b120 110 fprintf(ofp, " --subbuf-size SIZE Subbuffer size in bytes {+k,+M,+G}\n");
0a9c6494
DG		 111 fprintf(ofp, " (default UST uid: %zu, UST pid: %zu, kernel: %zu, metadata: %zu)\n",
112 default_get_ust_uid_channel_subbuf_size(),
113 default_get_ust_pid_channel_subbuf_size(),
114 default_get_kernel_channel_subbuf_size(),
115 default_get_metadata_subbuf_size());
1cb514ce 116 fprintf(ofp, " Rounded up to the next power of 2.\n");
cc62c0c0 117 fprintf(ofp, " --num-subbuf NUM Number of subbufers\n");
0a9c6494
DG		 118 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
119 DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM, DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM,
120 DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM, DEFAULT_METADATA_SUBBUF_NUM);
1cb514ce 121 fprintf(ofp, " Rounded up to the next power of 2.\n");
0a9c6494
DG		 122 fprintf(ofp, " --switch-timer USEC Switch timer interval in usec\n");
123 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
124 DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER, DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER,
125 DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER, DEFAULT_METADATA_SWITCH_TIMER);
126 fprintf(ofp, " --read-timer USEC Read timer interval in usec.\n");
127 fprintf(ofp, " (default UST uid: %u, UST pid: %u, kernel: %u, metadata: %u)\n",
128 DEFAULT_UST_UID_CHANNEL_READ_TIMER, DEFAULT_UST_UID_CHANNEL_READ_TIMER,
129 DEFAULT_KERNEL_CHANNEL_READ_TIMER, DEFAULT_METADATA_READ_TIMER);
a79d84dd
DG		 130 fprintf(ofp, " --output TYPE Channel output type (Values: %s, %s)\n",
131 output_mmap, output_splice);
0a9c6494
DG		 132 fprintf(ofp, " (default UST uid: %s, UST pid: %s, kernel: %s, metadata: %s)\n",
133 DEFAULT_UST_UID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
134 DEFAULT_UST_PID_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
135 DEFAULT_KERNEL_CHANNEL_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice,
136 DEFAULT_METADATA_OUTPUT == LTTNG_EVENT_MMAP ? output_mmap : output_splice);
05c35276
DG		 137 fprintf(ofp, " --buffers-uid Use per UID buffer (-u only)\n");
138 fprintf(ofp, " --buffers-pid Use per PID buffer (-u only)\n");
7972aab2 139 fprintf(ofp, " --buffers-global Use shared buffer for the whole system (-k only)\n");
1624d5b7 140 fprintf(ofp, " -C, --tracefile-size SIZE\n");
0a9c6494
DG		 141 fprintf(ofp, " Maximum size of each tracefile within a stream (in bytes). 0 means unlimited.\n");
142 fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_SIZE);
c0684a0d
MD		 143 fprintf(ofp, " Note: traces generated with this option may inaccurately report\n");
144 fprintf(ofp, " discarded events as per CTF 1.8.\n");
1624d5b7
JD		 145 fprintf(ofp, " -W, --tracefile-count COUNT\n");
146 fprintf(ofp, " Used in conjunction with -C option, this will limit the number\n");
0a9c6494
DG		 147 fprintf(ofp, " of files created to the specified count. 0 means unlimited.\n");
148 fprintf(ofp, " (default: %u)\n", DEFAULT_CHANNEL_TRACEFILE_COUNT);
d36b8583
DG		 149 fprintf(ofp, "\n");
150}
151
5edd7e09
DG		 152/*
153 * Set default attributes depending on those already defined from the command
154 * line.
155 */
156static void set_default_attr(struct lttng_domain *dom)
157{
158 struct lttng_channel_attr default_attr;
159
160 /* Set attributes */
161 lttng_channel_set_default_attr(dom, &default_attr);
162
163 if (chan.attr.overwrite == -1) {
164 chan.attr.overwrite = default_attr.overwrite;
165 }
166 if (chan.attr.subbuf_size == -1) {
167 chan.attr.subbuf_size = default_attr.subbuf_size;
168 }
169 if (chan.attr.num_subbuf == -1) {
170 chan.attr.num_subbuf = default_attr.num_subbuf;
171 }
172 if (chan.attr.switch_timer_interval == -1) {
173 chan.attr.switch_timer_interval = default_attr.switch_timer_interval;
174 }
175 if (chan.attr.read_timer_interval == -1) {
176 chan.attr.read_timer_interval = default_attr.read_timer_interval;
177 }
109be0da 178 if ((int) chan.attr.output == -1) {
5edd7e09
DG		 179 chan.attr.output = default_attr.output;
180 }
1624d5b7
JD		 181 if (chan.attr.tracefile_count == -1) {
182 chan.attr.tracefile_count = default_attr.tracefile_count;
183 }
184 if (chan.attr.tracefile_size == -1) {
185 chan.attr.tracefile_size = default_attr.tracefile_size;
186 }
5edd7e09
DG		 187}
188
d36b8583 189/*
0fdd1e2c 190 * Adding channel using the lttng API.
d36b8583 191 */
cd80958d 192static int enable_channel(char *session_name)
d36b8583 193{
acc09215 194 int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0;
d36b8583 195 char *channel_name;
7d29a247 196 struct lttng_domain dom;
d36b8583 197
441c16a7
MD		 198 memset(&dom, 0, sizeof(dom));
199
d78d6610 200 /* Create lttng domain */
7d29a247
DG		 201 if (opt_kernel) {
202 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 203 dom.buf_type = LTTNG_BUFFER_GLOBAL;
88c5f0d8
DG		 204 if (opt_buffer_uid || opt_buffer_pid) {
205 ERR("Buffer type not supported for domain -k");
206 ret = CMD_ERROR;
207 goto error;
208 }
d78d6610 209 } else if (opt_userspace) {
f6a9efaa 210 dom.type = LTTNG_DOMAIN_UST;
8692d4e5
DG		 211 if (opt_buffer_pid) {
212 dom.buf_type = LTTNG_BUFFER_PER_PID;
7972aab2 213 } else {
88c5f0d8
DG		 214 if (opt_buffer_global) {
215 ERR("Buffer type not supported for domain -u");
216 ret = CMD_ERROR;
217 goto error;
218 }
8692d4e5 219 dom.buf_type = LTTNG_BUFFER_PER_UID;
7972aab2 220 }
0fdd1e2c 221 } else {
3ecec76a
PP		 222 /* Checked by the caller. */
223 assert(0);
7d29a247
DG		 224 }
225
5edd7e09
DG		 226 set_default_attr(&dom);
227
d16dee89
DG		 228 if (chan.attr.tracefile_size == 0 && chan.attr.tracefile_count) {
229 ERR("Missing option --tracefile-size. "
230 "A file count without a size won't do anything.");
231 ret = CMD_ERROR;
232 goto error;
233 }
234
1624d5b7
JD		 235 if ((chan.attr.tracefile_size > 0) &&
236 (chan.attr.tracefile_size < chan.attr.subbuf_size)) {
de65565a 237 WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")",
1624d5b7 238 chan.attr.tracefile_size, chan.attr.subbuf_size);
de65565a 239 chan.attr.tracefile_size = chan.attr.subbuf_size;
1624d5b7
JD		 240 }
241
a79d84dd
DG		 242 /* Setting channel output */
243 if (opt_output) {
244 if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) {
245 chan.attr.output = LTTNG_EVENT_MMAP;
246 } else if (!strncmp(output_splice, opt_output, strlen(output_splice))) {
247 chan.attr.output = LTTNG_EVENT_SPLICE;
248 } else {
249 ERR("Unknown output type %s. Possible values are: %s, %s\n",
250 opt_output, output_mmap, output_splice);
251 usage(stderr);
252 ret = CMD_ERROR;
253 goto error;
254 }
255 }
256
cd80958d
DG		 257 handle = lttng_create_handle(session_name, &dom);
258 if (handle == NULL) {
259 ret = -1;
260 goto error;
261 }
262
acc09215
JRJ		 263 /* Mi open channels element */
264 if (lttng_opt_mi) {
265 assert(writer);
266 ret = mi_lttng_channels_open(writer);
267 if (ret) {
268 ret = CMD_ERROR;
269 goto error;
270 }
271 }
272
0fdd1e2c 273 /* Strip channel list (format: chan1,chan2,...) */
d36b8583
DG		 274 channel_name = strtok(opt_channels, ",");
275 while (channel_name != NULL) {
1f345e94
PP		 276 /* Validate channel name's length */
277 if (strlen(channel_name) >= NAME_MAX) {
278 ERR("Channel name is too long (max. %zu characters)",
279 sizeof(chan.name) - 1);
280 error = 1;
281 goto skip_enable;
282 }
283
284 /* Copy channel name */
285 strcpy(chan.name, channel_name);
0fdd1e2c
DG		 286
287 DBG("Enabling channel %s", channel_name);
288
289 ret = lttng_enable_channel(handle, &chan);
290 if (ret < 0) {
acc09215 291 success = 0;
42224349 292 switch (-ret) {
f73fabfd
DG		 293 case LTTNG_ERR_KERN_CHAN_EXIST:
294 case LTTNG_ERR_UST_CHAN_EXIST:
b9dfb167 295 case LTTNG_ERR_CHAN_EXIST:
88c5f0d8 296 WARN("Channel %s: %s (session %s)", channel_name,
42224349 297 lttng_strerror(ret), session_name);
acc09215
JRJ		 298 warn = 1;
299 break;
1f345e94
PP		 300 case LTTNG_ERR_INVALID_CHANNEL_NAME:
301 ERR("Invalid channel name: \"%s\". "
302 "Channel names may not start with '.', and "
303 "may not contain '/'.", channel_name);
304 error = 1;
305 break;
42224349
DG		 306 default:
307 ERR("Channel %s: %s (session %s)", channel_name,
308 lttng_strerror(ret), session_name);
acc09215 309 error = 1;
42224349
DG		 310 break;
311 }
d36b8583 312 } else {
7885e399 313 MSG("%s channel %s enabled for session %s",
b9dfb167 314 get_domain_str(dom.type), channel_name, session_name);
acc09215
JRJ		 315 success = 1;
316 }
317
1f345e94 318skip_enable:
acc09215
JRJ		 319 if (lttng_opt_mi) {
320 /* Mi print the channel element and leave it open */
321 ret = mi_lttng_channel(writer, &chan, 1);
322 if (ret) {
323 ret = CMD_ERROR;
324 goto error;
325 }
326
327 /* Individual Success ? */
328 ret = mi_lttng_writer_write_element_bool(writer,
329 mi_lttng_element_command_success, success);
330 if (ret) {
331 ret = CMD_ERROR;
332 goto error;
333 }
334
335 /* Close channel element */
336 ret = mi_lttng_writer_close_element(writer);
337 if (ret) {
338 ret = CMD_ERROR;
339 goto error;
340 }
d36b8583
DG		 341 }
342
acc09215 343 /* Next channel */
d36b8583
DG		 344 channel_name = strtok(NULL, ",");
345 }
346
acc09215
JRJ		 347 if (lttng_opt_mi) {
348 /* Close channels element */
349 ret = mi_lttng_writer_close_element(writer);
350 if (ret) {
351 ret = CMD_ERROR;
352 goto error;
353 }
354 }
355
ae856491
DG		 356 ret = CMD_SUCCESS;
357
d36b8583 358error:
acc09215
JRJ		 359 /* If more important error happen bypass the warning */
360 if (!ret && warn) {
ae856491
DG		 361 ret = CMD_WARNING;
362 }
acc09215
JRJ		 363 /* If more important error happen bypass the warning */
364 if (!ret && error) {
365 ret = CMD_ERROR;
366 }
ae856491 367
cd80958d
DG		 368 lttng_destroy_handle(handle);
369
d36b8583
DG		 370 return ret;
371}
372
373/*
0fdd1e2c 374 * Default value for channel configuration.
7d29a247
DG		 375 */
376static void init_channel_config(void)
377{
5edd7e09
DG		 378 /*
379 * Put -1 everywhere so we can identify those set by the command line and
380 * those needed to be set by the default values.
381 */
382 memset(&chan.attr, -1, sizeof(chan.attr));
394ff38e 383 chan.attr.extended.ptr = NULL;
7d29a247
DG		 384}
385
386/*
0fdd1e2c 387 * Add channel to trace session
d36b8583
DG		 388 */
389int cmd_enable_channels(int argc, const char **argv)
390{
acc09215 391 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
d36b8583 392 static poptContext pc;
cd80958d 393 char *session_name = NULL;
70d0b120 394 char *opt_arg = NULL;
d36b8583 395
7d29a247
DG		 396 init_channel_config();
397
d36b8583
DG		 398 pc = poptGetContext(NULL, argc, argv, long_options, 0);
399 poptReadDefaultConfig(pc, 0);
400
401 while ((opt = poptGetNextOpt(pc)) != -1) {
402 switch (opt) {
403 case OPT_HELP:
ca1c3607 404 usage(stdout);
d36b8583 405 goto end;
7d29a247
DG		 406 case OPT_DISCARD:
407 chan.attr.overwrite = 0;
408 DBG("Channel set to discard");
409 break;
410 case OPT_OVERWRITE:
411 chan.attr.overwrite = 1;
412 DBG("Channel set to overwrite");
413 break;
414 case OPT_SUBBUF_SIZE:
1cb514ce
MD		 415 {
416 uint64_t rounded_size;
417 int order;
418
70d0b120
SM		 419 /* Parse the size */
420 opt_arg = poptGetOptArg(pc);
1cb514ce
MD		 421 if (utils_parse_size_suffix(opt_arg, &chan.attr.subbuf_size) < 0 || !chan.attr.subbuf_size) {
422 ERR("Wrong value in --subbuf-size parameter: %s", opt_arg);
70d0b120
SM		 423 ret = CMD_ERROR;
424 goto end;
425 }
426
1cb514ce
MD		 427 order = get_count_order_u64(chan.attr.subbuf_size);
428 assert(order >= 0);
429 rounded_size = 1ULL << order;
06c0da96
DG		 430 if (rounded_size < chan.attr.subbuf_size) {
431 ERR("The subbuf size (%" PRIu64 ") is rounded and overflows!",
432 chan.attr.subbuf_size);
433 ret = CMD_ERROR;
434 goto end;
435 }
436
1cb514ce
MD		 437 if (rounded_size != chan.attr.subbuf_size) {
438 WARN("The subbuf size (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
439 chan.attr.subbuf_size, rounded_size);
440 chan.attr.subbuf_size = rounded_size;
70d0b120
SM		 441 }
442
1cb514ce
MD		 443 /* Should now be power of 2 */
444 assert(!((chan.attr.subbuf_size - 1) & chan.attr.subbuf_size));
445
5a0de755 446 DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size);
7d29a247 447 break;
1cb514ce 448 }
7d29a247 449 case OPT_NUM_SUBBUF:
1cb514ce
MD		 450 {
451 uint64_t rounded_size;
452 int order;
453
16068db5 454 errno = 0;
1cb514ce
MD		 455 opt_arg = poptGetOptArg(pc);
456 chan.attr.num_subbuf = strtoull(opt_arg, NULL, 0);
457 if (errno != 0 || !chan.attr.num_subbuf || !isdigit(opt_arg[0])) {
458 ERR("Wrong value in --num-subbuf parameter: %s", opt_arg);
16068db5
MD		 459 ret = CMD_ERROR;
460 goto end;
461 }
462
1cb514ce
MD		 463 order = get_count_order_u64(chan.attr.num_subbuf);
464 assert(order >= 0);
465 rounded_size = 1ULL << order;
e123b80c 466 if (rounded_size < chan.attr.num_subbuf) {
06c0da96
DG		 467 ERR("The number of subbuffers (%" PRIu64 ") is rounded and overflows!",
468 chan.attr.num_subbuf);
469 ret = CMD_ERROR;
470 goto end;
471 }
472
1cb514ce
MD		 473 if (rounded_size != chan.attr.num_subbuf) {
474 WARN("The number of subbuffers (%" PRIu64 ") is rounded to the next power of 2 (%" PRIu64 ")",
475 chan.attr.num_subbuf, rounded_size);
476 chan.attr.num_subbuf = rounded_size;
477 }
478
479 /* Should now be power of 2 */
480 assert(!((chan.attr.num_subbuf - 1) & chan.attr.num_subbuf));
481
5a0de755 482 DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf);
7d29a247 483 break;
1cb514ce 484 }
7d29a247 485 case OPT_SWITCH_TIMER:
16068db5
MD		 486 {
487 unsigned long v;
488
489 errno = 0;
1cb514ce
MD		 490 opt_arg = poptGetOptArg(pc);
491 v = strtoul(opt_arg, NULL, 0);
492 if (errno != 0 || !isdigit(opt_arg[0])) {
493 ERR("Wrong value in --switch-timer parameter: %s", opt_arg);
16068db5
MD		 494 ret = CMD_ERROR;
495 goto end;
496 }
497 if (v != (uint32_t) v) {
498 ERR("32-bit overflow in --switch-timer parameter: %s", opt_arg);
499 ret = CMD_ERROR;
500 goto end;
501 }
502 chan.attr.switch_timer_interval = (uint32_t) v;
7d29a247
DG		 503 DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
504 break;
16068db5 505 }
7d29a247 506 case OPT_READ_TIMER:
16068db5
MD		 507 {
508 unsigned long v;
509
510 errno = 0;
1cb514ce
MD		 511 opt_arg = poptGetOptArg(pc);
512 v = strtoul(opt_arg, NULL, 0);
513 if (errno != 0 || !isdigit(opt_arg[0])) {
514 ERR("Wrong value in --read-timer parameter: %s", opt_arg);
16068db5
MD		 515 ret = CMD_ERROR;
516 goto end;
517 }
518 if (v != (uint32_t) v) {
519 ERR("32-bit overflow in --read-timer parameter: %s", opt_arg);
520 ret = CMD_ERROR;
521 goto end;
522 }
523 chan.attr.read_timer_interval = (uint32_t) v;
7d29a247 524 DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
d36b8583 525 break;
16068db5 526 }
eeac7d46
MD		 527 case OPT_USERSPACE:
528 opt_userspace = 1;
eeac7d46 529 break;
1624d5b7 530 case OPT_TRACEFILE_SIZE:
1cb514ce 531 opt_arg = poptGetOptArg(pc);
16068db5 532 if (utils_parse_size_suffix(opt_arg, &chan.attr.tracefile_size) < 0) {
1cb514ce 533 ERR("Wrong value in --tracefile-size parameter: %s", opt_arg);
16068db5
MD		 534 ret = CMD_ERROR;
535 goto end;
536 }
1624d5b7
JD		 537 DBG("Maximum tracefile size set to %" PRIu64,
538 chan.attr.tracefile_size);
539 break;
540 case OPT_TRACEFILE_COUNT:
16068db5
MD		 541 {
542 unsigned long v;
543
544 errno = 0;
1cb514ce
MD		 545 opt_arg = poptGetOptArg(pc);
546 v = strtoul(opt_arg, NULL, 0);
547 if (errno != 0 || !isdigit(opt_arg[0])) {
548 ERR("Wrong value in --tracefile-count parameter: %s", opt_arg);
16068db5
MD		 549 ret = CMD_ERROR;
550 goto end;
551 }
552 if (v != (uint32_t) v) {
553 ERR("32-bit overflow in --tracefile-count parameter: %s", opt_arg);
554 ret = CMD_ERROR;
555 goto end;
556 }
557 chan.attr.tracefile_count = (uint32_t) v;
1624d5b7
JD		 558 DBG("Maximum tracefile count set to %" PRIu64,
559 chan.attr.tracefile_count);
560 break;
16068db5 561 }
679b4943
SM		 562 case OPT_LIST_OPTIONS:
563 list_cmd_options(stdout, long_options);
679b4943 564 goto end;
d36b8583
DG		 565 default:
566 usage(stderr);
567 ret = CMD_UNDEFINED;
568 goto end;
569 }
570 }
571
3ecec76a
PP		 572 ret = print_missing_or_multiple_domains(opt_kernel + opt_userspace);
573 if (ret) {
574 ret = CMD_ERROR;
575 goto end;
576 }
577
acc09215
JRJ		 578 /* Mi check */
579 if (lttng_opt_mi) {
580 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
581 if (!writer) {
582 ret = -LTTNG_ERR_NOMEM;
583 goto end;
584 }
585
586 /* Open command element */
587 ret = mi_lttng_writer_command_open(writer,
588 mi_lttng_element_command_enable_channels);
589 if (ret) {
590 ret = CMD_ERROR;
591 goto end;
592 }
593
594 /* Open output element */
595 ret = mi_lttng_writer_open_element(writer,
596 mi_lttng_element_command_output);
597 if (ret) {
598 ret = CMD_ERROR;
599 goto end;
600 }
601 }
602
d36b8583
DG		 603 opt_channels = (char*) poptGetArg(pc);
604 if (opt_channels == NULL) {
7d29a247 605 ERR("Missing channel name.\n");
d36b8583 606 usage(stderr);
ca1c3607 607 ret = CMD_ERROR;
acc09215
JRJ		 608 success = 0;
609 goto mi_closing;
d36b8583
DG		 610 }
611
cd80958d
DG		 612 if (!opt_session_name) {
613 session_name = get_session_name();
614 if (session_name == NULL) {
acc09215
JRJ		 615 command_ret = CMD_ERROR;
616 success = 0;
617 goto mi_closing;
cd80958d
DG		 618 }
619 } else {
620 session_name = opt_session_name;
621 }
622
acc09215
JRJ		 623 command_ret = enable_channel(session_name);
624 if (command_ret) {
625 success = 0;
626 }
627
628mi_closing:
629 /* Mi closing */
630 if (lttng_opt_mi) {
631 /* Close output element */
632 ret = mi_lttng_writer_close_element(writer);
633 if (ret) {
634 goto end;
635 }
636
637 /* Success ? */
638 ret = mi_lttng_writer_write_element_bool(writer,
639 mi_lttng_element_command_success, success);
640 if (ret) {
641 goto end;
642 }
643
644 /* Command element close */
645 ret = mi_lttng_writer_command_close(writer);
646 if (ret) {
647 goto end;
648 }
649 }
d36b8583
DG		 650
651end:
acc09215
JRJ		 652 /* Mi clean-up */
653 if (writer && mi_lttng_writer_destroy(writer)) {
654 /* Preserve original error code */
655 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
656 }
657
5853fd43
DG		 658 if (!opt_session_name && session_name) {
659 free(session_name);
660 }
acc09215
JRJ		 661
662 /* Overwrite ret if an error occurred when enable_channel */
663 ret = command_ret ? command_ret : ret;
ca1c3607 664 poptFreeContext(pc);
d36b8583
DG		 665 return ret;
666}
LTTng 2.0 tools and control repository
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