Commit | Line | Data |
---|---|---|
52050943 SR |
1 | /* |
2 | * Copyright (C) 2008,2009, Steven Rostedt <srostedt@redhat.com> | |
3 | * | |
4 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License (not later!) | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | * | |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
20 | */ | |
c168fbfb | 21 | #include "util.h" |
52050943 | 22 | #include <dirent.h> |
659d8cfb | 23 | #include <mntent.h> |
52050943 SR |
24 | #include <stdio.h> |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <stdarg.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/stat.h> | |
30 | #include <sys/wait.h> | |
31 | #include <pthread.h> | |
32 | #include <fcntl.h> | |
33 | #include <unistd.h> | |
52050943 | 34 | #include <errno.h> |
1ef2ed10 | 35 | #include <stdbool.h> |
69aad6f1 | 36 | #include <linux/list.h> |
e2561368 | 37 | #include <linux/kernel.h> |
52050943 | 38 | |
1ef2ed10 | 39 | #include "../perf.h" |
52050943 | 40 | #include "trace-event.h" |
553873e1 | 41 | #include <api/fs/debugfs.h> |
69aad6f1 | 42 | #include "evsel.h" |
84f5d36f | 43 | #include "debug.h" |
52050943 | 44 | |
52050943 SR |
45 | #define VERSION "0.5" |
46 | ||
52050943 SR |
47 | static int output_fd; |
48 | ||
52050943 | 49 | |
52050943 SR |
50 | int bigendian(void) |
51 | { | |
52 | unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; | |
53 | unsigned int *ptr; | |
54 | ||
65014ab3 | 55 | ptr = (unsigned int *)(void *)str; |
52050943 SR |
56 | return *ptr == 0x01020304; |
57 | } | |
58 | ||
259032bf | 59 | /* unfortunately, you can not stat debugfs or proc files for size */ |
8755d5e2 | 60 | static int record_file(const char *file, ssize_t hdr_sz) |
52050943 SR |
61 | { |
62 | unsigned long long size = 0; | |
259032bf SR |
63 | char buf[BUFSIZ], *sizep; |
64 | off_t hdr_pos = lseek(output_fd, 0, SEEK_CUR); | |
65 | int r, fd; | |
8755d5e2 | 66 | int err = -EIO; |
52050943 SR |
67 | |
68 | fd = open(file, O_RDONLY); | |
7f42b950 NK |
69 | if (fd < 0) { |
70 | pr_debug("Can't read '%s'", file); | |
71 | return -errno; | |
72 | } | |
52050943 | 73 | |
259032bf | 74 | /* put in zeros for file size, then fill true size later */ |
8755d5e2 NK |
75 | if (hdr_sz) { |
76 | if (write(output_fd, &size, hdr_sz) != hdr_sz) | |
77 | goto out; | |
78 | } | |
52050943 SR |
79 | |
80 | do { | |
81 | r = read(fd, buf, BUFSIZ); | |
259032bf | 82 | if (r > 0) { |
52050943 | 83 | size += r; |
8755d5e2 NK |
84 | if (write(output_fd, buf, r) != r) |
85 | goto out; | |
259032bf | 86 | } |
52050943 | 87 | } while (r > 0); |
52050943 | 88 | |
259032bf SR |
89 | /* ugh, handle big-endian hdr_size == 4 */ |
90 | sizep = (char*)&size; | |
91 | if (bigendian()) | |
92 | sizep += sizeof(u64) - hdr_sz; | |
93 | ||
7f42b950 NK |
94 | if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0) { |
95 | pr_debug("writing file size failed\n"); | |
96 | goto out; | |
97 | } | |
8755d5e2 NK |
98 | |
99 | err = 0; | |
100 | out: | |
101 | close(fd); | |
102 | return err; | |
52050943 SR |
103 | } |
104 | ||
077f159d | 105 | static int record_header_files(void) |
52050943 | 106 | { |
52050943 | 107 | char *path; |
259032bf | 108 | struct stat st; |
8755d5e2 | 109 | int err = -EIO; |
52050943 SR |
110 | |
111 | path = get_tracing_file("events/header_page"); | |
7f42b950 NK |
112 | if (!path) { |
113 | pr_debug("can't get tracing/events/header_page"); | |
114 | return -ENOMEM; | |
115 | } | |
454f8c7d | 116 | |
7f42b950 NK |
117 | if (stat(path, &st) < 0) { |
118 | pr_debug("can't read '%s'", path); | |
119 | goto out; | |
120 | } | |
52050943 | 121 | |
8755d5e2 NK |
122 | if (write(output_fd, "header_page", 12) != 12) { |
123 | pr_debug("can't write header_page\n"); | |
124 | goto out; | |
125 | } | |
126 | ||
127 | if (record_file(path, 8) < 0) { | |
128 | pr_debug("can't record header_page file\n"); | |
129 | goto out; | |
130 | } | |
131 | ||
52050943 SR |
132 | put_tracing_file(path); |
133 | ||
134 | path = get_tracing_file("events/header_event"); | |
7f42b950 NK |
135 | if (!path) { |
136 | pr_debug("can't get tracing/events/header_event"); | |
137 | err = -ENOMEM; | |
138 | goto out; | |
139 | } | |
454f8c7d | 140 | |
7f42b950 NK |
141 | if (stat(path, &st) < 0) { |
142 | pr_debug("can't read '%s'", path); | |
143 | goto out; | |
144 | } | |
52050943 | 145 | |
8755d5e2 NK |
146 | if (write(output_fd, "header_event", 13) != 13) { |
147 | pr_debug("can't write header_event\n"); | |
148 | goto out; | |
149 | } | |
150 | ||
151 | if (record_file(path, 8) < 0) { | |
152 | pr_debug("can't record header_event file\n"); | |
153 | goto out; | |
154 | } | |
155 | ||
156 | err = 0; | |
157 | out: | |
52050943 | 158 | put_tracing_file(path); |
8755d5e2 | 159 | return err; |
52050943 SR |
160 | } |
161 | ||
1ef2ed10 FW |
162 | static bool name_in_tp_list(char *sys, struct tracepoint_path *tps) |
163 | { | |
164 | while (tps) { | |
165 | if (!strcmp(sys, tps->name)) | |
166 | return true; | |
167 | tps = tps->next; | |
168 | } | |
169 | ||
170 | return false; | |
171 | } | |
172 | ||
5a6fd27a | 173 | static int copy_event_system(const char *sys, struct tracepoint_path *tps) |
52050943 | 174 | { |
52050943 SR |
175 | struct dirent *dent; |
176 | struct stat st; | |
177 | char *format; | |
178 | DIR *dir; | |
179 | int count = 0; | |
180 | int ret; | |
5a6fd27a | 181 | int err; |
52050943 SR |
182 | |
183 | dir = opendir(sys); | |
7f42b950 NK |
184 | if (!dir) { |
185 | pr_debug("can't read directory '%s'", sys); | |
186 | return -errno; | |
187 | } | |
52050943 SR |
188 | |
189 | while ((dent = readdir(dir))) { | |
659d8cfb UD |
190 | if (dent->d_type != DT_DIR || |
191 | strcmp(dent->d_name, ".") == 0 || | |
1ef2ed10 FW |
192 | strcmp(dent->d_name, "..") == 0 || |
193 | !name_in_tp_list(dent->d_name, tps)) | |
52050943 | 194 | continue; |
d400a68d | 195 | if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) { |
5a6fd27a NK |
196 | err = -ENOMEM; |
197 | goto out; | |
198 | } | |
52050943 SR |
199 | ret = stat(format, &st); |
200 | free(format); | |
201 | if (ret < 0) | |
202 | continue; | |
203 | count++; | |
204 | } | |
205 | ||
8755d5e2 NK |
206 | if (write(output_fd, &count, 4) != 4) { |
207 | err = -EIO; | |
208 | pr_debug("can't write count\n"); | |
209 | goto out; | |
210 | } | |
52050943 SR |
211 | |
212 | rewinddir(dir); | |
213 | while ((dent = readdir(dir))) { | |
659d8cfb UD |
214 | if (dent->d_type != DT_DIR || |
215 | strcmp(dent->d_name, ".") == 0 || | |
1ef2ed10 FW |
216 | strcmp(dent->d_name, "..") == 0 || |
217 | !name_in_tp_list(dent->d_name, tps)) | |
52050943 | 218 | continue; |
d400a68d | 219 | if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) { |
5a6fd27a NK |
220 | err = -ENOMEM; |
221 | goto out; | |
222 | } | |
52050943 SR |
223 | ret = stat(format, &st); |
224 | ||
8755d5e2 NK |
225 | if (ret >= 0) { |
226 | err = record_file(format, 8); | |
227 | if (err) { | |
228 | free(format); | |
229 | goto out; | |
230 | } | |
231 | } | |
52050943 SR |
232 | free(format); |
233 | } | |
5a6fd27a NK |
234 | err = 0; |
235 | out: | |
9967411e | 236 | closedir(dir); |
5a6fd27a | 237 | return err; |
52050943 SR |
238 | } |
239 | ||
077f159d | 240 | static int record_ftrace_files(struct tracepoint_path *tps) |
52050943 SR |
241 | { |
242 | char *path; | |
8755d5e2 | 243 | int ret; |
52050943 SR |
244 | |
245 | path = get_tracing_file("events/ftrace"); | |
7f42b950 NK |
246 | if (!path) { |
247 | pr_debug("can't get tracing/events/ftrace"); | |
248 | return -ENOMEM; | |
249 | } | |
52050943 | 250 | |
8755d5e2 | 251 | ret = copy_event_system(path, tps); |
52050943 SR |
252 | |
253 | put_tracing_file(path); | |
8755d5e2 NK |
254 | |
255 | return ret; | |
52050943 SR |
256 | } |
257 | ||
1ef2ed10 FW |
258 | static bool system_in_tp_list(char *sys, struct tracepoint_path *tps) |
259 | { | |
260 | while (tps) { | |
261 | if (!strcmp(sys, tps->system)) | |
262 | return true; | |
263 | tps = tps->next; | |
264 | } | |
265 | ||
266 | return false; | |
267 | } | |
268 | ||
077f159d | 269 | static int record_event_files(struct tracepoint_path *tps) |
52050943 SR |
270 | { |
271 | struct dirent *dent; | |
272 | struct stat st; | |
273 | char *path; | |
274 | char *sys; | |
275 | DIR *dir; | |
276 | int count = 0; | |
277 | int ret; | |
5a6fd27a | 278 | int err; |
52050943 SR |
279 | |
280 | path = get_tracing_file("events"); | |
7f42b950 NK |
281 | if (!path) { |
282 | pr_debug("can't get tracing/events"); | |
283 | return -ENOMEM; | |
284 | } | |
52050943 SR |
285 | |
286 | dir = opendir(path); | |
7f42b950 NK |
287 | if (!dir) { |
288 | err = -errno; | |
289 | pr_debug("can't read directory '%s'", path); | |
290 | goto out; | |
291 | } | |
52050943 SR |
292 | |
293 | while ((dent = readdir(dir))) { | |
659d8cfb UD |
294 | if (dent->d_type != DT_DIR || |
295 | strcmp(dent->d_name, ".") == 0 || | |
52050943 | 296 | strcmp(dent->d_name, "..") == 0 || |
1ef2ed10 FW |
297 | strcmp(dent->d_name, "ftrace") == 0 || |
298 | !system_in_tp_list(dent->d_name, tps)) | |
52050943 | 299 | continue; |
659d8cfb | 300 | count++; |
52050943 SR |
301 | } |
302 | ||
8755d5e2 NK |
303 | if (write(output_fd, &count, 4) != 4) { |
304 | err = -EIO; | |
305 | pr_debug("can't write count\n"); | |
306 | goto out; | |
307 | } | |
52050943 SR |
308 | |
309 | rewinddir(dir); | |
310 | while ((dent = readdir(dir))) { | |
659d8cfb UD |
311 | if (dent->d_type != DT_DIR || |
312 | strcmp(dent->d_name, ".") == 0 || | |
52050943 | 313 | strcmp(dent->d_name, "..") == 0 || |
1ef2ed10 FW |
314 | strcmp(dent->d_name, "ftrace") == 0 || |
315 | !system_in_tp_list(dent->d_name, tps)) | |
52050943 | 316 | continue; |
d400a68d | 317 | if (asprintf(&sys, "%s/%s", path, dent->d_name) < 0) { |
5a6fd27a NK |
318 | err = -ENOMEM; |
319 | goto out; | |
320 | } | |
52050943 SR |
321 | ret = stat(sys, &st); |
322 | if (ret >= 0) { | |
8755d5e2 NK |
323 | ssize_t size = strlen(dent->d_name) + 1; |
324 | ||
325 | if (write(output_fd, dent->d_name, size) != size || | |
326 | copy_event_system(sys, tps) < 0) { | |
327 | err = -EIO; | |
328 | free(sys); | |
329 | goto out; | |
330 | } | |
52050943 SR |
331 | } |
332 | free(sys); | |
333 | } | |
5a6fd27a NK |
334 | err = 0; |
335 | out: | |
9967411e | 336 | closedir(dir); |
52050943 | 337 | put_tracing_file(path); |
5a6fd27a NK |
338 | |
339 | return err; | |
52050943 SR |
340 | } |
341 | ||
077f159d | 342 | static int record_proc_kallsyms(void) |
52050943 | 343 | { |
259032bf | 344 | unsigned int size; |
52050943 SR |
345 | const char *path = "/proc/kallsyms"; |
346 | struct stat st; | |
8755d5e2 | 347 | int ret, err = 0; |
52050943 SR |
348 | |
349 | ret = stat(path, &st); | |
350 | if (ret < 0) { | |
351 | /* not found */ | |
352 | size = 0; | |
8755d5e2 NK |
353 | if (write(output_fd, &size, 4) != 4) |
354 | err = -EIO; | |
355 | return err; | |
52050943 | 356 | } |
8755d5e2 | 357 | return record_file(path, 4); |
52050943 SR |
358 | } |
359 | ||
077f159d | 360 | static int record_ftrace_printk(void) |
52050943 | 361 | { |
259032bf | 362 | unsigned int size; |
6706ccf8 | 363 | char *path; |
52050943 | 364 | struct stat st; |
8755d5e2 | 365 | int ret, err = 0; |
52050943 SR |
366 | |
367 | path = get_tracing_file("printk_formats"); | |
7f42b950 NK |
368 | if (!path) { |
369 | pr_debug("can't get tracing/printk_formats"); | |
370 | return -ENOMEM; | |
371 | } | |
454f8c7d | 372 | |
52050943 SR |
373 | ret = stat(path, &st); |
374 | if (ret < 0) { | |
375 | /* not found */ | |
376 | size = 0; | |
8755d5e2 NK |
377 | if (write(output_fd, &size, 4) != 4) |
378 | err = -EIO; | |
6706ccf8 | 379 | goto out; |
52050943 | 380 | } |
8755d5e2 | 381 | err = record_file(path, 4); |
259032bf | 382 | |
6706ccf8 LZ |
383 | out: |
384 | put_tracing_file(path); | |
8755d5e2 | 385 | return err; |
52050943 SR |
386 | } |
387 | ||
7f42b950 NK |
388 | static void |
389 | put_tracepoints_path(struct tracepoint_path *tps) | |
390 | { | |
391 | while (tps) { | |
392 | struct tracepoint_path *t = tps; | |
393 | ||
394 | tps = tps->next; | |
74cf249d ACM |
395 | zfree(&t->name); |
396 | zfree(&t->system); | |
7f42b950 NK |
397 | free(t); |
398 | } | |
399 | } | |
400 | ||
1ef2ed10 | 401 | static struct tracepoint_path * |
69aad6f1 | 402 | get_tracepoints_path(struct list_head *pattrs) |
1ef2ed10 FW |
403 | { |
404 | struct tracepoint_path path, *ppath = &path; | |
69aad6f1 ACM |
405 | struct perf_evsel *pos; |
406 | int nr_tracepoints = 0; | |
1ef2ed10 | 407 | |
69aad6f1 ACM |
408 | list_for_each_entry(pos, pattrs, node) { |
409 | if (pos->attr.type != PERF_TYPE_TRACEPOINT) | |
1ef2ed10 | 410 | continue; |
e2561368 | 411 | ++nr_tracepoints; |
e7c93f09 NK |
412 | |
413 | if (pos->name) { | |
414 | ppath->next = tracepoint_name_to_path(pos->name); | |
415 | if (ppath->next) | |
416 | goto next; | |
417 | ||
418 | if (strchr(pos->name, ':') == NULL) | |
419 | goto try_id; | |
420 | ||
421 | goto error; | |
422 | } | |
423 | ||
424 | try_id: | |
69aad6f1 | 425 | ppath->next = tracepoint_id_to_path(pos->attr.config); |
7f42b950 | 426 | if (!ppath->next) { |
e7c93f09 | 427 | error: |
7f42b950 NK |
428 | pr_debug("No memory to alloc tracepoints list\n"); |
429 | put_tracepoints_path(&path); | |
430 | return NULL; | |
431 | } | |
e7c93f09 | 432 | next: |
1ef2ed10 FW |
433 | ppath = ppath->next; |
434 | } | |
435 | ||
e2561368 | 436 | return nr_tracepoints > 0 ? path.next : NULL; |
1ef2ed10 | 437 | } |
e2561368 | 438 | |
69aad6f1 | 439 | bool have_tracepoints(struct list_head *pattrs) |
63e0c771 | 440 | { |
69aad6f1 | 441 | struct perf_evsel *pos; |
db620b1c | 442 | |
69aad6f1 ACM |
443 | list_for_each_entry(pos, pattrs, node) |
444 | if (pos->attr.type == PERF_TYPE_TRACEPOINT) | |
db620b1c TZ |
445 | return true; |
446 | ||
447 | return false; | |
63e0c771 TZ |
448 | } |
449 | ||
8755d5e2 | 450 | static int tracing_data_header(void) |
52050943 | 451 | { |
29208e57 | 452 | char buf[20]; |
8755d5e2 | 453 | ssize_t size; |
52050943 | 454 | |
29208e57 | 455 | /* just guessing this is someone's birthday.. ;) */ |
52050943 SR |
456 | buf[0] = 23; |
457 | buf[1] = 8; | |
458 | buf[2] = 68; | |
459 | memcpy(buf + 3, "tracing", 7); | |
460 | ||
8755d5e2 NK |
461 | if (write(output_fd, buf, 10) != 10) |
462 | return -1; | |
52050943 | 463 | |
8755d5e2 NK |
464 | size = strlen(VERSION) + 1; |
465 | if (write(output_fd, VERSION, size) != size) | |
466 | return -1; | |
52050943 SR |
467 | |
468 | /* save endian */ | |
469 | if (bigendian()) | |
470 | buf[0] = 1; | |
471 | else | |
472 | buf[0] = 0; | |
473 | ||
8755d5e2 NK |
474 | if (write(output_fd, buf, 1) != 1) |
475 | return -1; | |
52050943 SR |
476 | |
477 | /* save size of long */ | |
478 | buf[0] = sizeof(long); | |
8755d5e2 NK |
479 | if (write(output_fd, buf, 1) != 1) |
480 | return -1; | |
52050943 SR |
481 | |
482 | /* save page_size */ | |
8755d5e2 NK |
483 | if (write(output_fd, &page_size, 4) != 4) |
484 | return -1; | |
485 | ||
486 | return 0; | |
29208e57 JO |
487 | } |
488 | ||
489 | struct tracing_data *tracing_data_get(struct list_head *pattrs, | |
490 | int fd, bool temp) | |
491 | { | |
492 | struct tracepoint_path *tps; | |
493 | struct tracing_data *tdata; | |
8755d5e2 | 494 | int err; |
29208e57 JO |
495 | |
496 | output_fd = fd; | |
497 | ||
498 | tps = get_tracepoints_path(pattrs); | |
499 | if (!tps) | |
500 | return NULL; | |
52050943 | 501 | |
5a6fd27a NK |
502 | tdata = malloc(sizeof(*tdata)); |
503 | if (!tdata) | |
504 | return NULL; | |
505 | ||
29208e57 JO |
506 | tdata->temp = temp; |
507 | tdata->size = 0; | |
508 | ||
509 | if (temp) { | |
510 | int temp_fd; | |
511 | ||
512 | snprintf(tdata->temp_file, sizeof(tdata->temp_file), | |
513 | "/tmp/perf-XXXXXX"); | |
7f42b950 NK |
514 | if (!mkstemp(tdata->temp_file)) { |
515 | pr_debug("Can't make temp file"); | |
516 | return NULL; | |
517 | } | |
29208e57 JO |
518 | |
519 | temp_fd = open(tdata->temp_file, O_RDWR); | |
7f42b950 NK |
520 | if (temp_fd < 0) { |
521 | pr_debug("Can't read '%s'", tdata->temp_file); | |
522 | return NULL; | |
523 | } | |
29208e57 JO |
524 | |
525 | /* | |
526 | * Set the temp file the default output, so all the | |
527 | * tracing data are stored into it. | |
528 | */ | |
529 | output_fd = temp_fd; | |
530 | } | |
531 | ||
8755d5e2 NK |
532 | err = tracing_data_header(); |
533 | if (err) | |
534 | goto out; | |
077f159d | 535 | err = record_header_files(); |
8755d5e2 NK |
536 | if (err) |
537 | goto out; | |
077f159d | 538 | err = record_ftrace_files(tps); |
8755d5e2 NK |
539 | if (err) |
540 | goto out; | |
077f159d | 541 | err = record_event_files(tps); |
8755d5e2 NK |
542 | if (err) |
543 | goto out; | |
077f159d | 544 | err = record_proc_kallsyms(); |
8755d5e2 NK |
545 | if (err) |
546 | goto out; | |
077f159d | 547 | err = record_ftrace_printk(); |
e2561368 | 548 | |
8755d5e2 | 549 | out: |
29208e57 JO |
550 | /* |
551 | * All tracing data are stored by now, we can restore | |
552 | * the default output file in case we used temp file. | |
553 | */ | |
554 | if (temp) { | |
555 | tdata->size = lseek(output_fd, 0, SEEK_CUR); | |
556 | close(output_fd); | |
557 | output_fd = fd; | |
558 | } | |
559 | ||
04662523 ACM |
560 | if (err) |
561 | zfree(&tdata); | |
8755d5e2 | 562 | |
29208e57 JO |
563 | put_tracepoints_path(tps); |
564 | return tdata; | |
52050943 | 565 | } |
9215545e | 566 | |
8755d5e2 | 567 | int tracing_data_put(struct tracing_data *tdata) |
9215545e | 568 | { |
8755d5e2 NK |
569 | int err = 0; |
570 | ||
29208e57 | 571 | if (tdata->temp) { |
8755d5e2 | 572 | err = record_file(tdata->temp_file, 0); |
29208e57 JO |
573 | unlink(tdata->temp_file); |
574 | } | |
9215545e | 575 | |
29208e57 | 576 | free(tdata); |
8755d5e2 | 577 | return err; |
29208e57 | 578 | } |
9215545e | 579 | |
29208e57 JO |
580 | int read_tracing_data(int fd, struct list_head *pattrs) |
581 | { | |
8755d5e2 | 582 | int err; |
29208e57 | 583 | struct tracing_data *tdata; |
9215545e | 584 | |
29208e57 JO |
585 | /* |
586 | * We work over the real file, so we can write data | |
587 | * directly, no temp file is needed. | |
588 | */ | |
589 | tdata = tracing_data_get(pattrs, fd, false); | |
590 | if (!tdata) | |
591 | return -ENOMEM; | |
592 | ||
8755d5e2 NK |
593 | err = tracing_data_put(tdata); |
594 | return err; | |
9215545e | 595 | } |