Commit | Line | Data |
---|---|---|
d0ca268b JA |
1 | /* |
2 | * block queue tracing application | |
3 | * | |
d956a2cd JA |
4 | * Copyright (C) 2005 Jens Axboe <axboe@suse.de> |
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; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
d0ca268b JA |
20 | */ |
21 | #include <pthread.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | #include <unistd.h> | |
25 | #include <locale.h> | |
26 | #include <signal.h> | |
27 | #include <fcntl.h> | |
28 | #include <string.h> | |
29 | #include <sys/ioctl.h> | |
b9d4294e | 30 | #include <sys/param.h> |
e3e74029 | 31 | #include <sys/statfs.h> |
d0ca268b JA |
32 | #include <stdio.h> |
33 | #include <stdlib.h> | |
34 | #include <sched.h> | |
d39c04ca AB |
35 | #include <ctype.h> |
36 | #include <getopt.h> | |
8a43bac5 | 37 | #include <sys/mman.h> |
d0ca268b JA |
38 | |
39 | #include "blktrace.h" | |
40 | ||
52724a0e JA |
41 | static char blktrace_version[] = "0.90"; |
42 | ||
d0ca268b JA |
43 | #define BUF_SIZE (128 *1024) |
44 | #define BUF_NR (4) | |
45 | ||
e3e74029 NS |
46 | #define RELAYFS_TYPE 0xF0B4A981 |
47 | ||
d39c04ca AB |
48 | #define DECLARE_MASK_MAP(mask) { BLK_TC_##mask, #mask, "BLK_TC_"#mask } |
49 | #define COMPARE_MASK_MAP(mmp, str) \ | |
75da3c6a NS |
50 | (!strcasecmp((mmp)->short_form, (str)) || \ |
51 | !strcasecmp((mmp)->long_form, (str))) | |
d39c04ca AB |
52 | |
53 | #define VALID_SET(x) ((1 <= (x)) && ((x) < (1 << BLK_TC_SHIFT))) | |
54 | ||
55 | struct mask_map { | |
56 | int mask; | |
57 | char *short_form; | |
58 | char *long_form; | |
59 | }; | |
60 | ||
8e68e38f | 61 | static struct mask_map mask_maps[] = { |
5c86134e JA |
62 | DECLARE_MASK_MAP(READ), |
63 | DECLARE_MASK_MAP(WRITE), | |
64 | DECLARE_MASK_MAP(BARRIER), | |
65 | DECLARE_MASK_MAP(SYNC), | |
66 | DECLARE_MASK_MAP(QUEUE), | |
67 | DECLARE_MASK_MAP(REQUEUE), | |
68 | DECLARE_MASK_MAP(ISSUE), | |
69 | DECLARE_MASK_MAP(COMPLETE), | |
70 | DECLARE_MASK_MAP(FS), | |
71 | DECLARE_MASK_MAP(PC), | |
d39c04ca AB |
72 | }; |
73 | ||
129aa440 | 74 | #define S_OPTS "d:a:A:r:o:kw:vb:n:" |
d5396421 | 75 | static struct option l_opts[] = { |
5c86134e | 76 | { |
d39c04ca | 77 | .name = "dev", |
428683db | 78 | .has_arg = required_argument, |
d39c04ca AB |
79 | .flag = NULL, |
80 | .val = 'd' | |
81 | }, | |
5c86134e | 82 | { |
d39c04ca | 83 | .name = "act-mask", |
428683db | 84 | .has_arg = required_argument, |
d39c04ca AB |
85 | .flag = NULL, |
86 | .val = 'a' | |
87 | }, | |
5c86134e | 88 | { |
d39c04ca | 89 | .name = "set-mask", |
428683db | 90 | .has_arg = required_argument, |
d39c04ca AB |
91 | .flag = NULL, |
92 | .val = 'A' | |
93 | }, | |
5c86134e | 94 | { |
5270dddd | 95 | .name = "relay", |
428683db | 96 | .has_arg = required_argument, |
5270dddd JA |
97 | .flag = NULL, |
98 | .val = 'r' | |
99 | }, | |
d5396421 JA |
100 | { |
101 | .name = "output", | |
428683db | 102 | .has_arg = required_argument, |
d5396421 JA |
103 | .flag = NULL, |
104 | .val = 'o' | |
105 | }, | |
bc39777c JA |
106 | { |
107 | .name = "kill", | |
428683db | 108 | .has_arg = no_argument, |
bc39777c JA |
109 | .flag = NULL, |
110 | .val = 'k' | |
111 | }, | |
ece238a6 NS |
112 | { |
113 | .name = "stopwatch", | |
428683db | 114 | .has_arg = required_argument, |
ece238a6 NS |
115 | .flag = NULL, |
116 | .val = 'w' | |
117 | }, | |
52724a0e JA |
118 | { |
119 | .name = "version", | |
120 | .has_arg = no_argument, | |
121 | .flag = NULL, | |
122 | .val = 'v' | |
123 | }, | |
129aa440 JA |
124 | { |
125 | .name = "buffer size", | |
126 | .has_arg = required_argument, | |
127 | .flag = NULL, | |
128 | .val = 'b' | |
129 | }, | |
130 | { | |
131 | .name = "nr of sub buffers", | |
132 | .has_arg = required_argument, | |
133 | .flag = NULL, | |
134 | .val = 'n' | |
135 | }, | |
d39c04ca AB |
136 | }; |
137 | ||
d0ca268b JA |
138 | struct thread_information { |
139 | int cpu; | |
140 | pthread_t thread; | |
b9d4294e JA |
141 | |
142 | int fd; | |
143 | char fn[MAXPATHLEN + 64]; | |
8a43bac5 JA |
144 | void *buf; |
145 | unsigned long buf_offset; | |
146 | unsigned int buf_subbuf; | |
147 | unsigned int sequence; | |
b9d4294e | 148 | |
d5396421 JA |
149 | pthread_mutex_t *fd_lock; |
150 | int ofd; | |
151 | ||
d0ca268b | 152 | unsigned long events_processed; |
e7c9f3ff | 153 | struct device_information *device; |
d0ca268b JA |
154 | }; |
155 | ||
e7c9f3ff NS |
156 | struct device_information { |
157 | int fd; | |
158 | char *path; | |
159 | char buts_name[32]; | |
160 | int trace_started; | |
161 | struct thread_information *threads; | |
162 | }; | |
d0ca268b | 163 | |
e7c9f3ff | 164 | static int ncpus; |
d0ca268b | 165 | static struct thread_information *thread_information; |
e7c9f3ff NS |
166 | static int ndevs; |
167 | static struct device_information *device_information; | |
168 | ||
169 | /* command line option globals */ | |
170 | static char *relay_path; | |
d5396421 | 171 | static char *output_name; |
5c86134e | 172 | static int act_mask = ~0U; |
bc39777c | 173 | static int kill_running_trace; |
8a43bac5 | 174 | static int use_mmap; |
129aa440 JA |
175 | static int buf_size = BUF_SIZE; |
176 | static int buf_nr = BUF_NR; | |
d39c04ca | 177 | |
e7c9f3ff NS |
178 | #define is_done() (*(volatile int *)(&done)) |
179 | static volatile int done; | |
180 | ||
d5396421 JA |
181 | static pthread_mutex_t stdout_mutex = PTHREAD_MUTEX_INITIALIZER; |
182 | ||
72ca8801 NS |
183 | static void exit_trace(int status); |
184 | ||
1f79c4a0 | 185 | static int find_mask_map(char *string) |
d39c04ca | 186 | { |
5c86134e JA |
187 | int i; |
188 | ||
189 | for (i = 0; i < sizeof(mask_maps)/sizeof(mask_maps[0]); i++) | |
75da3c6a | 190 | if (COMPARE_MASK_MAP(&mask_maps[i], string)) |
5c86134e | 191 | return mask_maps[i].mask; |
d39c04ca | 192 | |
d39c04ca AB |
193 | return -1; |
194 | } | |
d0ca268b | 195 | |
e7c9f3ff | 196 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
197 | { |
198 | struct blk_user_trace_setup buts; | |
199 | ||
1f79c4a0 | 200 | memset(&buts, 0, sizeof(buts)); |
129aa440 JA |
201 | buts.buf_size = buf_size; |
202 | buts.buf_nr = buf_nr; | |
d39c04ca | 203 | buts.act_mask = act_mask; |
d0ca268b | 204 | |
e7c9f3ff | 205 | if (ioctl(dip->fd, BLKSTARTTRACE, &buts) < 0) { |
d0ca268b JA |
206 | perror("BLKSTARTTRACE"); |
207 | return 1; | |
208 | } | |
209 | ||
e7c9f3ff NS |
210 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
211 | dip->trace_started = 1; | |
d0ca268b JA |
212 | return 0; |
213 | } | |
214 | ||
e7c9f3ff | 215 | static void stop_trace(struct device_information *dip) |
d0ca268b | 216 | { |
e7c9f3ff NS |
217 | if (dip->trace_started || kill_running_trace) { |
218 | if (ioctl(dip->fd, BLKSTOPTRACE) < 0) | |
707b0914 | 219 | perror("BLKSTOPTRACE"); |
e7c9f3ff NS |
220 | close(dip->fd); |
221 | dip->trace_started = 0; | |
707b0914 | 222 | } |
d0ca268b JA |
223 | } |
224 | ||
e7c9f3ff NS |
225 | static void stop_all_traces(void) |
226 | { | |
227 | struct device_information *dip; | |
228 | int i; | |
229 | ||
230 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) | |
231 | stop_trace(dip); | |
232 | } | |
233 | ||
8a43bac5 | 234 | static int get_data_read(struct thread_information *tip, void *buf, int len) |
d0ca268b | 235 | { |
8a43bac5 JA |
236 | char *p = buf; |
237 | int ret, bytes_left = len; | |
d0ca268b | 238 | |
8a43bac5 | 239 | while (!is_done() && bytes_left > 0) { |
b9d4294e | 240 | ret = read(tip->fd, p, bytes_left); |
8a43bac5 | 241 | if (ret == len) |
3752a433 | 242 | return 0; |
8a43bac5 JA |
243 | |
244 | if (ret < 0) { | |
b9d4294e | 245 | perror(tip->fn); |
8a43bac5 | 246 | fprintf(stderr,"Thread %d failed read of %s\n", |
b9d4294e | 247 | tip->cpu, tip->fn); |
76718bcd | 248 | exit_trace(1); |
8a43bac5 JA |
249 | } else if (ret > 0) { |
250 | fprintf(stderr,"Thread %d misread %s %d,%d\n", | |
251 | tip->cpu, tip->fn, ret, len); | |
252 | exit_trace(1); | |
3aabcd89 | 253 | } else { |
d0ca268b JA |
254 | p += ret; |
255 | bytes_left -= ret; | |
256 | } | |
8a43bac5 JA |
257 | |
258 | usleep(10000); | |
259 | } | |
260 | ||
3752a433 | 261 | return -1; |
8a43bac5 JA |
262 | } |
263 | ||
264 | static int get_data_mmap(struct thread_information *tip, void *buf, int len, | |
265 | int check_magic) | |
266 | { | |
129aa440 | 267 | if (len > (buf_size * (tip->buf_subbuf + 1)) - tip->buf_offset) { |
8a43bac5 | 268 | tip->buf_subbuf++; |
129aa440 | 269 | if (tip->buf_subbuf == buf_nr) |
8a43bac5 JA |
270 | tip->buf_subbuf = 0; |
271 | ||
129aa440 | 272 | tip->buf_offset = tip->buf_subbuf * buf_size; |
8a43bac5 JA |
273 | } |
274 | ||
3752a433 | 275 | while (1) { |
8a43bac5 JA |
276 | struct blk_io_trace *t = buf; |
277 | ||
278 | memcpy(buf, tip->buf + tip->buf_offset, len); | |
279 | ||
280 | if (!check_magic) | |
281 | break; | |
282 | ||
283 | if (CHECK_MAGIC(t) && t->sequence >= tip->sequence) { | |
284 | tip->sequence = t->sequence; | |
285 | break; | |
286 | } | |
3752a433 JA |
287 | |
288 | if (is_done()) | |
289 | return -1; | |
8a43bac5 JA |
290 | |
291 | usleep(10000); | |
d0ca268b JA |
292 | } |
293 | ||
8a43bac5 JA |
294 | tip->buf_offset += len; |
295 | return 0; | |
296 | } | |
297 | ||
298 | static int get_data(struct thread_information *tip, void *buf, int len, | |
299 | int check_magic) | |
300 | { | |
301 | if (tip->buf) | |
302 | return get_data_mmap(tip, buf, len, check_magic); | |
303 | else | |
304 | return get_data_read(tip, buf, len); | |
305 | } | |
306 | ||
307 | static void *extract_data(struct thread_information *tip, char *ofn, int nb) | |
308 | { | |
309 | unsigned char *buf; | |
310 | ||
311 | buf = malloc(nb); | |
312 | if (!get_data(tip, buf, nb, 0)) | |
313 | return buf; | |
314 | ||
315 | free(buf); | |
316 | exit_trace(1); | |
317 | return NULL; | |
d0ca268b JA |
318 | } |
319 | ||
d5396421 JA |
320 | static inline void tip_fd_unlock(struct thread_information *tip) |
321 | { | |
322 | if (tip->fd_lock) | |
323 | pthread_mutex_unlock(tip->fd_lock); | |
324 | } | |
325 | ||
326 | static inline void tip_fd_lock(struct thread_information *tip) | |
327 | { | |
328 | if (tip->fd_lock) | |
329 | pthread_mutex_lock(tip->fd_lock); | |
330 | } | |
331 | ||
3aabcd89 | 332 | static void *extract(void *arg) |
d0ca268b JA |
333 | { |
334 | struct thread_information *tip = arg; | |
d5396421 | 335 | int ret, pdu_len; |
69e65a9e | 336 | char dp[64], *pdu_data; |
d0ca268b JA |
337 | struct blk_io_trace t; |
338 | pid_t pid = getpid(); | |
339 | cpu_set_t cpu_mask; | |
340 | ||
341 | CPU_ZERO(&cpu_mask); | |
b9d4294e | 342 | CPU_SET((tip->cpu), &cpu_mask); |
d0ca268b JA |
343 | |
344 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { | |
345 | perror("sched_setaffinity"); | |
76718bcd | 346 | exit_trace(1); |
d0ca268b JA |
347 | } |
348 | ||
e7c9f3ff NS |
349 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
350 | relay_path, tip->device->buts_name, tip->cpu); | |
b9d4294e JA |
351 | tip->fd = open(tip->fn, O_RDONLY); |
352 | if (tip->fd < 0) { | |
353 | perror(tip->fn); | |
5c86134e JA |
354 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, |
355 | tip->fn); | |
76718bcd | 356 | exit_trace(1); |
d0ca268b JA |
357 | } |
358 | ||
8a43bac5 | 359 | if (use_mmap) { |
129aa440 | 360 | tip->buf = mmap(NULL, buf_size * buf_nr, PROT_READ, |
8a43bac5 JA |
361 | MAP_PRIVATE | MAP_POPULATE, tip->fd, 0); |
362 | if (tip->buf == MAP_FAILED) { | |
363 | perror("mmap"); | |
364 | exit_trace(1); | |
365 | } | |
366 | } | |
367 | ||
69e65a9e | 368 | pdu_data = NULL; |
d0ca268b | 369 | while (!is_done()) { |
8a43bac5 JA |
370 | if (get_data(tip, &t, sizeof(t), 1)) |
371 | break; | |
d0ca268b JA |
372 | |
373 | if (verify_trace(&t)) | |
76718bcd | 374 | exit_trace(1); |
d0ca268b | 375 | |
18ada3d4 JA |
376 | pdu_len = t.pdu_len; |
377 | ||
6fe4709e JA |
378 | trace_to_be(&t); |
379 | ||
69e65a9e JA |
380 | if (pdu_len) |
381 | pdu_data = extract_data(tip, dp, pdu_len); | |
382 | ||
383 | /* | |
384 | * now we have both trace and payload, get a lock on the | |
385 | * output descriptor and send it off | |
386 | */ | |
d5396421 JA |
387 | tip_fd_lock(tip); |
388 | ||
389 | ret = write(tip->ofd, &t, sizeof(t)); | |
d0ca268b | 390 | if (ret < 0) { |
d5396421 JA |
391 | fprintf(stderr,"Thread %d failed write\n", tip->cpu); |
392 | tip_fd_unlock(tip); | |
76718bcd | 393 | exit_trace(1); |
d0ca268b JA |
394 | } |
395 | ||
69e65a9e JA |
396 | if (pdu_data) { |
397 | ret = write(tip->ofd, pdu_data, pdu_len); | |
398 | if (ret != pdu_len) { | |
399 | perror("write pdu data"); | |
8a43bac5 | 400 | tip_fd_unlock(tip); |
69e65a9e JA |
401 | exit_trace(1); |
402 | } | |
d5396421 | 403 | |
69e65a9e JA |
404 | free(pdu_data); |
405 | pdu_data = NULL; | |
406 | } | |
87b72777 | 407 | |
69e65a9e | 408 | tip_fd_unlock(tip); |
d0ca268b JA |
409 | tip->events_processed++; |
410 | } | |
411 | ||
412 | return NULL; | |
413 | } | |
414 | ||
e7c9f3ff | 415 | static int start_threads(struct device_information *dip) |
d0ca268b JA |
416 | { |
417 | struct thread_information *tip; | |
d5396421 | 418 | char op[64]; |
e7c9f3ff | 419 | int j, pipeline = output_name && !strcmp(output_name, "-"); |
d0ca268b | 420 | |
e7c9f3ff NS |
421 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { |
422 | tip->cpu = j; | |
423 | tip->device = dip; | |
d5396421 | 424 | tip->fd_lock = NULL; |
d0ca268b JA |
425 | tip->events_processed = 0; |
426 | ||
e7c9f3ff | 427 | if (pipeline) { |
1f79c4a0 | 428 | tip->ofd = dup(STDOUT_FILENO); |
d5396421 JA |
429 | tip->fd_lock = &stdout_mutex; |
430 | } else { | |
9f6486bd JA |
431 | if (output_name) { |
432 | sprintf(op, "%s.blktrace.%d", output_name, | |
433 | tip->cpu); | |
434 | } else { | |
435 | sprintf(op, "%s.blktrace.%d", | |
e7c9f3ff | 436 | dip->buts_name, tip->cpu); |
9f6486bd | 437 | } |
d5396421 JA |
438 | tip->ofd = open(op, O_CREAT|O_TRUNC|O_WRONLY, 0644); |
439 | } | |
440 | ||
441 | if (tip->ofd < 0) { | |
442 | perror(op); | |
e7c9f3ff | 443 | return 1; |
d5396421 JA |
444 | } |
445 | ||
d0ca268b | 446 | if (pthread_create(&tip->thread, NULL, extract, tip)) { |
e7c9f3ff NS |
447 | perror("pthread_create"); |
448 | close(tip->ofd); | |
449 | return 1; | |
d0ca268b JA |
450 | } |
451 | } | |
452 | ||
e7c9f3ff | 453 | return 0; |
d0ca268b JA |
454 | } |
455 | ||
72ca8801 NS |
456 | static void close_thread(struct thread_information *tip) |
457 | { | |
8a43bac5 | 458 | if (tip->buf) |
129aa440 | 459 | munmap(tip->buf, buf_size * buf_nr); |
8a43bac5 | 460 | |
72ca8801 NS |
461 | if (tip->fd != -1) |
462 | close(tip->fd); | |
463 | if (tip->ofd != -1) | |
464 | close(tip->ofd); | |
8a43bac5 | 465 | |
72ca8801 NS |
466 | tip->fd = tip->ofd = -1; |
467 | } | |
468 | ||
e7c9f3ff | 469 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 470 | { |
e7c9f3ff NS |
471 | struct thread_information *tip; |
472 | long ret; | |
473 | int j; | |
3aabcd89 | 474 | |
e7c9f3ff | 475 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { |
3aabcd89 JA |
476 | if (pthread_join(tip->thread, (void *) &ret)) |
477 | perror("thread_join"); | |
72ca8801 | 478 | close_thread(tip); |
3aabcd89 JA |
479 | } |
480 | } | |
481 | ||
e7c9f3ff | 482 | static void stop_all_threads(void) |
72ca8801 | 483 | { |
e7c9f3ff | 484 | struct device_information *dip; |
72ca8801 NS |
485 | int i; |
486 | ||
e7c9f3ff NS |
487 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) |
488 | stop_threads(dip); | |
489 | } | |
490 | ||
491 | static void stop_all_tracing(void) | |
492 | { | |
493 | struct device_information *dip; | |
494 | struct thread_information *tip; | |
495 | int i, j; | |
496 | ||
497 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
498 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) | |
499 | close_thread(tip); | |
500 | stop_trace(dip); | |
501 | } | |
72ca8801 NS |
502 | } |
503 | ||
504 | static void exit_trace(int status) | |
505 | { | |
e7c9f3ff | 506 | stop_all_tracing(); |
72ca8801 NS |
507 | exit(status); |
508 | } | |
509 | ||
e7c9f3ff NS |
510 | static int resize_devices(char *path) |
511 | { | |
512 | int size = (ndevs + 1) * sizeof(struct device_information); | |
513 | ||
514 | device_information = realloc(device_information, size); | |
515 | if (!device_information) { | |
516 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
517 | return 1; | |
518 | } | |
519 | device_information[ndevs].path = path; | |
520 | ndevs++; | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static int open_devices(void) | |
d0ca268b | 525 | { |
e7c9f3ff | 526 | struct device_information *dip; |
d0ca268b | 527 | int i; |
d0ca268b | 528 | |
e7c9f3ff NS |
529 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { |
530 | dip->fd = open(dip->path, O_RDONLY); | |
531 | if (dip->fd < 0) { | |
532 | perror(dip->path); | |
533 | return 1; | |
534 | } | |
535 | } | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static int start_devices(void) | |
540 | { | |
541 | struct device_information *dip; | |
542 | int i, j, size; | |
543 | ||
544 | size = ncpus * sizeof(struct thread_information); | |
545 | thread_information = malloc(size * ndevs); | |
546 | if (!thread_information) { | |
547 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
548 | return 1; | |
549 | } | |
d5396421 | 550 | |
e7c9f3ff NS |
551 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { |
552 | if (start_trace(dip)) { | |
553 | close(dip->fd); | |
554 | fprintf(stderr, "Failed to start trace on %s\n", | |
555 | dip->path); | |
556 | break; | |
557 | } | |
558 | } | |
559 | if (i != ndevs) { | |
560 | for (dip = device_information, j = 0; j < i; j++, dip++) | |
561 | stop_trace(dip); | |
562 | return 1; | |
563 | } | |
564 | ||
565 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
566 | dip->threads = thread_information + (i * ncpus); | |
567 | if (start_threads(dip)) { | |
568 | fprintf(stderr, "Failed to start worker threads\n"); | |
569 | break; | |
570 | } | |
571 | } | |
572 | if (i != ndevs) { | |
573 | for (dip = device_information, j = 0; j < i; j++, dip++) | |
574 | stop_threads(dip); | |
575 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) | |
576 | stop_trace(dip); | |
577 | return 1; | |
d0ca268b JA |
578 | } |
579 | ||
e7c9f3ff | 580 | return 0; |
d0ca268b JA |
581 | } |
582 | ||
e7c9f3ff NS |
583 | static void show_stats(void) |
584 | { | |
585 | int i, j; | |
586 | struct device_information *dip; | |
587 | struct thread_information *tip; | |
588 | unsigned long long events_processed; | |
428683db | 589 | |
e7c9f3ff NS |
590 | if (output_name && !strcmp(output_name, "-")) |
591 | return; | |
592 | ||
593 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
594 | printf("Device: %s\n", dip->path); | |
595 | events_processed = 0; | |
596 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { | |
597 | printf(" CPU%3d: %20ld events\n", | |
598 | tip->cpu, tip->events_processed); | |
599 | events_processed += tip->events_processed; | |
600 | } | |
601 | printf(" Total: %20lld events\n", events_processed); | |
602 | } | |
603 | } | |
52724a0e JA |
604 | |
605 | static char usage_str[] = \ | |
606 | "-d <dev> [ -r relay path ] [ -o <output> ] [-k ] [ -w time ]\n" \ | |
607 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ | |
608 | "\t-d Use specified device. May also be given last after options\n" \ | |
609 | "\t-r Path to mounted relayfs, defaults to /relay\n" \ | |
610 | "\t-o File(s) to send output to\n" \ | |
611 | "\t-k Kill a running trace\n" \ | |
612 | "\t-w Stop after defined time, in seconds\n" \ | |
613 | "\t-a Only trace specified actions. See documentation\n" \ | |
614 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
615 | "\t-b Sub buffer size in KiB\n" \ |
616 | "\t-n Number of sub buffers\n" \ | |
52724a0e JA |
617 | "\t-v Print program version info\n\n"; |
618 | ||
ee1f4158 NS |
619 | static void show_usage(char *program) |
620 | { | |
52724a0e | 621 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 NS |
622 | } |
623 | ||
1f79c4a0 | 624 | static void handle_sigint(int sig) |
d0ca268b | 625 | { |
d0ca268b JA |
626 | done = 1; |
627 | } | |
628 | ||
629 | int main(int argc, char *argv[]) | |
630 | { | |
5270dddd | 631 | static char default_relay_path[] = "/relay"; |
e3e74029 | 632 | struct statfs st; |
d39c04ca | 633 | int i, c; |
ece238a6 | 634 | int stop_watch = 0; |
d39c04ca AB |
635 | int act_mask_tmp = 0; |
636 | ||
637 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
638 | switch (c) { | |
639 | case 'a': | |
640 | i = find_mask_map(optarg); | |
641 | if (i < 0) { | |
ab197ca7 | 642 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 643 | optarg); |
7425d456 | 644 | return 1; |
d39c04ca AB |
645 | } |
646 | act_mask_tmp |= i; | |
647 | break; | |
648 | ||
649 | case 'A': | |
650 | if ((sscanf(optarg, "%x", &i) != 1) || !VALID_SET(i)) { | |
651 | fprintf(stderr, | |
ab197ca7 | 652 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 653 | optarg, i); |
7425d456 | 654 | return 1; |
d39c04ca AB |
655 | } |
656 | act_mask_tmp = i; | |
657 | break; | |
d0ca268b | 658 | |
d39c04ca | 659 | case 'd': |
e7c9f3ff NS |
660 | if (resize_devices(optarg) != 0) |
661 | return 1; | |
d39c04ca AB |
662 | break; |
663 | ||
5270dddd JA |
664 | case 'r': |
665 | relay_path = optarg; | |
666 | break; | |
667 | ||
d5396421 | 668 | case 'o': |
66efebf8 | 669 | output_name = optarg; |
d5396421 | 670 | break; |
bc39777c JA |
671 | case 'k': |
672 | kill_running_trace = 1; | |
673 | break; | |
ece238a6 NS |
674 | case 'w': |
675 | stop_watch = atoi(optarg); | |
676 | if (stop_watch <= 0) { | |
677 | fprintf(stderr, | |
678 | "Invalid stopwatch value (%d secs)\n", | |
679 | stop_watch); | |
680 | return 1; | |
681 | } | |
682 | break; | |
52724a0e JA |
683 | case 'v': |
684 | printf("%s version %s\n", argv[0], blktrace_version); | |
685 | return 0; | |
129aa440 JA |
686 | case 'b': |
687 | buf_size = atoi(optarg); | |
688 | if (buf_size <= 0) { | |
689 | fprintf(stderr, | |
690 | "Invalid buffer size (%d)\n", buf_size); | |
691 | return 1; | |
692 | } | |
693 | buf_size <<= 10; | |
694 | break; | |
695 | case 'n': | |
696 | buf_nr = atoi(optarg); | |
697 | if (buf_nr <= 0) { | |
698 | fprintf(stderr, | |
699 | "Invalid buffer nr (%d)\n", buf_nr); | |
700 | return 1; | |
701 | } | |
702 | break; | |
d39c04ca | 703 | default: |
ee1f4158 | 704 | show_usage(argv[0]); |
7425d456 | 705 | return 1; |
d39c04ca AB |
706 | } |
707 | } | |
708 | ||
e7c9f3ff NS |
709 | while (optind < argc) { |
710 | if (resize_devices(argv[optind++]) != 0) | |
711 | return 1; | |
712 | } | |
ee1f4158 | 713 | |
e7c9f3ff | 714 | if (ndevs == 0) { |
ee1f4158 | 715 | show_usage(argv[0]); |
7425d456 | 716 | return 1; |
d39c04ca AB |
717 | } |
718 | ||
5270dddd JA |
719 | if (!relay_path) |
720 | relay_path = default_relay_path; | |
721 | ||
d5396421 | 722 | if (act_mask_tmp != 0) |
d39c04ca | 723 | act_mask = act_mask_tmp; |
d0ca268b | 724 | |
e3e74029 NS |
725 | if (statfs(relay_path, &st) < 0) { |
726 | perror("statfs"); | |
727 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
728 | relay_path); | |
729 | return 1; | |
730 | } else if (st.f_type != RELAYFS_TYPE) { | |
731 | fprintf(stderr,"%s does not appear to be a relay filesystem\n", | |
d0ca268b | 732 | relay_path); |
7425d456 | 733 | return 1; |
d0ca268b JA |
734 | } |
735 | ||
e7c9f3ff | 736 | if (open_devices() != 0) |
7425d456 | 737 | return 1; |
bc39777c JA |
738 | |
739 | if (kill_running_trace) { | |
e7c9f3ff | 740 | stop_all_traces(); |
7425d456 | 741 | return 0; |
bc39777c JA |
742 | } |
743 | ||
d0ca268b JA |
744 | setlocale(LC_NUMERIC, "en_US"); |
745 | ||
e7c9f3ff NS |
746 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
747 | if (ncpus < 0) { | |
748 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 749 | return 1; |
d0ca268b JA |
750 | } |
751 | ||
e7c9f3ff NS |
752 | if (start_devices() != 0) |
753 | return 1; | |
754 | ||
d0ca268b JA |
755 | signal(SIGINT, handle_sigint); |
756 | signal(SIGHUP, handle_sigint); | |
757 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 758 | signal(SIGALRM, handle_sigint); |
d0ca268b | 759 | |
e7c9f3ff | 760 | atexit(stop_all_tracing); |
830fd65c | 761 | |
ece238a6 NS |
762 | if (stop_watch) |
763 | alarm(stop_watch); | |
764 | ||
d0ca268b JA |
765 | while (!is_done()) |
766 | sleep(1); | |
767 | ||
e7c9f3ff NS |
768 | stop_all_threads(); |
769 | stop_all_traces(); | |
d0ca268b JA |
770 | show_stats(); |
771 | ||
772 | return 0; | |
773 | } | |
774 |