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> | |
d0ca268b JA |
37 | |
38 | #include "blktrace.h" | |
39 | ||
13d928f0 | 40 | static char blktrace_version[] = "0.99"; |
52724a0e | 41 | |
d0ca268b JA |
42 | #define BUF_SIZE (128 *1024) |
43 | #define BUF_NR (4) | |
44 | ||
e3e74029 NS |
45 | #define RELAYFS_TYPE 0xF0B4A981 |
46 | ||
57ea8602 | 47 | #define S_OPTS "d:a:A:r:o:kw:Vb:n:D:" |
d5396421 | 48 | static struct option l_opts[] = { |
5c86134e | 49 | { |
d39c04ca | 50 | .name = "dev", |
428683db | 51 | .has_arg = required_argument, |
d39c04ca AB |
52 | .flag = NULL, |
53 | .val = 'd' | |
54 | }, | |
5c86134e | 55 | { |
d39c04ca | 56 | .name = "act-mask", |
428683db | 57 | .has_arg = required_argument, |
d39c04ca AB |
58 | .flag = NULL, |
59 | .val = 'a' | |
60 | }, | |
5c86134e | 61 | { |
d39c04ca | 62 | .name = "set-mask", |
428683db | 63 | .has_arg = required_argument, |
d39c04ca AB |
64 | .flag = NULL, |
65 | .val = 'A' | |
66 | }, | |
5c86134e | 67 | { |
5270dddd | 68 | .name = "relay", |
428683db | 69 | .has_arg = required_argument, |
5270dddd JA |
70 | .flag = NULL, |
71 | .val = 'r' | |
72 | }, | |
d5396421 JA |
73 | { |
74 | .name = "output", | |
428683db | 75 | .has_arg = required_argument, |
d5396421 JA |
76 | .flag = NULL, |
77 | .val = 'o' | |
78 | }, | |
bc39777c JA |
79 | { |
80 | .name = "kill", | |
428683db | 81 | .has_arg = no_argument, |
bc39777c JA |
82 | .flag = NULL, |
83 | .val = 'k' | |
84 | }, | |
ece238a6 NS |
85 | { |
86 | .name = "stopwatch", | |
428683db | 87 | .has_arg = required_argument, |
ece238a6 NS |
88 | .flag = NULL, |
89 | .val = 'w' | |
90 | }, | |
52724a0e JA |
91 | { |
92 | .name = "version", | |
93 | .has_arg = no_argument, | |
94 | .flag = NULL, | |
57ea8602 | 95 | .val = 'V' |
52724a0e | 96 | }, |
129aa440 | 97 | { |
3f65c585 | 98 | .name = "buffer-size", |
129aa440 JA |
99 | .has_arg = required_argument, |
100 | .flag = NULL, | |
101 | .val = 'b' | |
102 | }, | |
103 | { | |
3f65c585 | 104 | .name = "num-sub-buffers", |
129aa440 JA |
105 | .has_arg = required_argument, |
106 | .flag = NULL, | |
107 | .val = 'n' | |
108 | }, | |
d1d7f15f | 109 | { |
3f65c585 | 110 | .name = "output-dir", |
d1d7f15f JA |
111 | .has_arg = required_argument, |
112 | .flag = NULL, | |
113 | .val = 'D' | |
114 | }, | |
71ef8b7c JA |
115 | { |
116 | .name = NULL, | |
117 | } | |
d39c04ca AB |
118 | }; |
119 | ||
d0ca268b JA |
120 | struct thread_information { |
121 | int cpu; | |
122 | pthread_t thread; | |
b9d4294e JA |
123 | |
124 | int fd; | |
125 | char fn[MAXPATHLEN + 64]; | |
8a43bac5 JA |
126 | void *buf; |
127 | unsigned long buf_offset; | |
128 | unsigned int buf_subbuf; | |
129 | unsigned int sequence; | |
b9d4294e | 130 | |
d5396421 JA |
131 | pthread_mutex_t *fd_lock; |
132 | int ofd; | |
133 | ||
d0ca268b | 134 | unsigned long events_processed; |
e7c9f3ff | 135 | struct device_information *device; |
d0ca268b JA |
136 | }; |
137 | ||
e7c9f3ff NS |
138 | struct device_information { |
139 | int fd; | |
140 | char *path; | |
141 | char buts_name[32]; | |
142 | int trace_started; | |
143 | struct thread_information *threads; | |
144 | }; | |
d0ca268b | 145 | |
e7c9f3ff | 146 | static int ncpus; |
d0ca268b | 147 | static struct thread_information *thread_information; |
e7c9f3ff NS |
148 | static int ndevs; |
149 | static struct device_information *device_information; | |
150 | ||
151 | /* command line option globals */ | |
152 | static char *relay_path; | |
d5396421 | 153 | static char *output_name; |
d1d7f15f | 154 | static char *output_dir; |
5c86134e | 155 | static int act_mask = ~0U; |
bc39777c | 156 | static int kill_running_trace; |
e820abd7 JA |
157 | static unsigned int buf_size = BUF_SIZE; |
158 | static unsigned int buf_nr = BUF_NR; | |
d39c04ca | 159 | |
e7c9f3ff NS |
160 | #define is_done() (*(volatile int *)(&done)) |
161 | static volatile int done; | |
162 | ||
d5396421 JA |
163 | static pthread_mutex_t stdout_mutex = PTHREAD_MUTEX_INITIALIZER; |
164 | ||
72ca8801 NS |
165 | static void exit_trace(int status); |
166 | ||
e7c9f3ff | 167 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
168 | { |
169 | struct blk_user_trace_setup buts; | |
170 | ||
1f79c4a0 | 171 | memset(&buts, 0, sizeof(buts)); |
129aa440 JA |
172 | buts.buf_size = buf_size; |
173 | buts.buf_nr = buf_nr; | |
d39c04ca | 174 | buts.act_mask = act_mask; |
d0ca268b | 175 | |
e7c9f3ff | 176 | if (ioctl(dip->fd, BLKSTARTTRACE, &buts) < 0) { |
d0ca268b JA |
177 | perror("BLKSTARTTRACE"); |
178 | return 1; | |
179 | } | |
180 | ||
e7c9f3ff NS |
181 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
182 | dip->trace_started = 1; | |
d0ca268b JA |
183 | return 0; |
184 | } | |
185 | ||
e7c9f3ff | 186 | static void stop_trace(struct device_information *dip) |
d0ca268b | 187 | { |
e7c9f3ff | 188 | if (dip->trace_started || kill_running_trace) { |
cf9208ea JA |
189 | dip->trace_started = 0; |
190 | ||
e7c9f3ff | 191 | if (ioctl(dip->fd, BLKSTOPTRACE) < 0) |
707b0914 | 192 | perror("BLKSTOPTRACE"); |
cf9208ea | 193 | |
e7c9f3ff | 194 | close(dip->fd); |
cf9208ea | 195 | dip->fd = -1; |
707b0914 | 196 | } |
d0ca268b JA |
197 | } |
198 | ||
e7c9f3ff NS |
199 | static void stop_all_traces(void) |
200 | { | |
201 | struct device_information *dip; | |
202 | int i; | |
203 | ||
204 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) | |
205 | stop_trace(dip); | |
206 | } | |
207 | ||
db6fe5bc | 208 | static int read_data(struct thread_information *tip, void *buf, int len) |
d0ca268b | 209 | { |
8a43bac5 JA |
210 | char *p = buf; |
211 | int ret, bytes_left = len; | |
d0ca268b | 212 | |
8a43bac5 | 213 | while (!is_done() && bytes_left > 0) { |
b9d4294e | 214 | ret = read(tip->fd, p, bytes_left); |
db6fe5bc | 215 | if (ret == bytes_left) |
3752a433 | 216 | return 0; |
8a43bac5 JA |
217 | |
218 | if (ret < 0) { | |
b9d4294e | 219 | perror(tip->fn); |
8a43bac5 | 220 | fprintf(stderr,"Thread %d failed read of %s\n", |
b9d4294e | 221 | tip->cpu, tip->fn); |
db6fe5bc | 222 | break; |
8a43bac5 | 223 | } else if (ret > 0) { |
d0ca268b JA |
224 | p += ret; |
225 | bytes_left -= ret; | |
db6fe5bc JA |
226 | } else |
227 | usleep(1000); | |
8a43bac5 JA |
228 | } |
229 | ||
3752a433 | 230 | return -1; |
8a43bac5 JA |
231 | } |
232 | ||
db6fe5bc | 233 | static int write_data(int fd, void *buf, unsigned int buf_len) |
8a43bac5 | 234 | { |
db6fe5bc JA |
235 | int ret, bytes_left; |
236 | char *p = buf; | |
8a43bac5 | 237 | |
db6fe5bc JA |
238 | bytes_left = buf_len; |
239 | while (bytes_left > 0) { | |
240 | ret = write(fd, p, bytes_left); | |
241 | if (ret == bytes_left) | |
8a43bac5 JA |
242 | break; |
243 | ||
db6fe5bc JA |
244 | if (ret < 0) { |
245 | perror("write"); | |
246 | return 1; | |
247 | } else if (ret > 0) { | |
248 | p += ret; | |
249 | bytes_left -= ret; | |
250 | } else { | |
251 | fprintf(stderr, "Zero write?\n"); | |
252 | return 1; | |
8a43bac5 | 253 | } |
d0ca268b JA |
254 | } |
255 | ||
8a43bac5 JA |
256 | return 0; |
257 | } | |
258 | ||
e820abd7 | 259 | static void *extract_data(struct thread_information *tip, int nb) |
8a43bac5 JA |
260 | { |
261 | unsigned char *buf; | |
262 | ||
263 | buf = malloc(nb); | |
db6fe5bc | 264 | if (!read_data(tip, buf, nb)) |
8a43bac5 JA |
265 | return buf; |
266 | ||
267 | free(buf); | |
8a43bac5 | 268 | return NULL; |
d0ca268b JA |
269 | } |
270 | ||
3a9d6c13 JA |
271 | /* |
272 | * trace may start inside 'bit' or may need to be gotten further on | |
273 | */ | |
274 | static int get_event_slow(struct thread_information *tip, | |
275 | struct blk_io_trace *bit) | |
4b5db44a | 276 | { |
3a9d6c13 JA |
277 | const int inc = sizeof(__u32); |
278 | struct blk_io_trace foo; | |
fb39f32f | 279 | unsigned int offset; |
3a9d6c13 JA |
280 | void *p; |
281 | ||
282 | /* | |
283 | * check is trace is inside | |
284 | */ | |
285 | offset = 0; | |
286 | p = bit; | |
287 | while (offset < sizeof(*bit)) { | |
288 | p += inc; | |
289 | offset += inc; | |
290 | ||
291 | memcpy(&foo, p, inc); | |
292 | ||
293 | if (CHECK_MAGIC(&foo)) | |
294 | break; | |
295 | } | |
4b5db44a | 296 | |
3a9d6c13 JA |
297 | /* |
298 | * part trace found inside, read the rest | |
299 | */ | |
300 | if (offset < sizeof(*bit)) { | |
301 | int good_bytes = sizeof(*bit) - offset; | |
302 | ||
303 | memmove(bit, p, good_bytes); | |
304 | p = (void *) bit + good_bytes; | |
305 | ||
306 | return read_data(tip, p, offset); | |
307 | } | |
308 | ||
309 | /* | |
310 | * nothing found, keep looking for start of trace | |
311 | */ | |
4b5db44a JA |
312 | do { |
313 | if (read_data(tip, bit, sizeof(bit->magic))) | |
314 | return -1; | |
4b5db44a JA |
315 | } while (!CHECK_MAGIC(bit)); |
316 | ||
3a9d6c13 JA |
317 | /* |
318 | * now get the rest of it | |
319 | */ | |
320 | p = &bit->sequence; | |
321 | if (!read_data(tip, p, sizeof(*bit) - inc)) | |
322 | return -1; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Sometimes relayfs screws us a little, if an event crosses a sub buffer | |
329 | * boundary. So keep looking forward in the trace data until an event | |
330 | * is found | |
331 | */ | |
332 | static int get_event(struct thread_information *tip, struct blk_io_trace *bit) | |
333 | { | |
334 | /* | |
335 | * optimize for the common fast case, a full trace read that | |
336 | * succeeds | |
337 | */ | |
338 | if (read_data(tip, bit, sizeof(*bit))) | |
339 | return -1; | |
340 | ||
341 | if (CHECK_MAGIC(bit)) | |
4b5db44a JA |
342 | return 0; |
343 | ||
3a9d6c13 JA |
344 | /* |
345 | * ok that didn't work, the event may start somewhere inside the | |
346 | * trace itself | |
347 | */ | |
348 | return get_event_slow(tip, bit); | |
4b5db44a JA |
349 | } |
350 | ||
d5396421 JA |
351 | static inline void tip_fd_unlock(struct thread_information *tip) |
352 | { | |
353 | if (tip->fd_lock) | |
354 | pthread_mutex_unlock(tip->fd_lock); | |
355 | } | |
356 | ||
357 | static inline void tip_fd_lock(struct thread_information *tip) | |
358 | { | |
359 | if (tip->fd_lock) | |
360 | pthread_mutex_lock(tip->fd_lock); | |
361 | } | |
362 | ||
3aabcd89 | 363 | static void *extract(void *arg) |
d0ca268b JA |
364 | { |
365 | struct thread_information *tip = arg; | |
db6fe5bc | 366 | int pdu_len; |
e820abd7 | 367 | char *pdu_data; |
d0ca268b JA |
368 | struct blk_io_trace t; |
369 | pid_t pid = getpid(); | |
370 | cpu_set_t cpu_mask; | |
371 | ||
372 | CPU_ZERO(&cpu_mask); | |
b9d4294e | 373 | CPU_SET((tip->cpu), &cpu_mask); |
d0ca268b JA |
374 | |
375 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { | |
376 | perror("sched_setaffinity"); | |
76718bcd | 377 | exit_trace(1); |
d0ca268b JA |
378 | } |
379 | ||
e7c9f3ff NS |
380 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
381 | relay_path, tip->device->buts_name, tip->cpu); | |
b9d4294e JA |
382 | tip->fd = open(tip->fn, O_RDONLY); |
383 | if (tip->fd < 0) { | |
384 | perror(tip->fn); | |
5c86134e JA |
385 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, |
386 | tip->fn); | |
76718bcd | 387 | exit_trace(1); |
d0ca268b JA |
388 | } |
389 | ||
69e65a9e | 390 | pdu_data = NULL; |
d0ca268b | 391 | while (!is_done()) { |
4b5db44a | 392 | if (get_event(tip, &t)) |
8a43bac5 | 393 | break; |
d0ca268b JA |
394 | |
395 | if (verify_trace(&t)) | |
db6fe5bc | 396 | break; |
d0ca268b | 397 | |
18ada3d4 JA |
398 | pdu_len = t.pdu_len; |
399 | ||
6fe4709e JA |
400 | trace_to_be(&t); |
401 | ||
db6fe5bc | 402 | if (pdu_len) { |
e820abd7 | 403 | pdu_data = extract_data(tip, pdu_len); |
db6fe5bc JA |
404 | if (!pdu_data) |
405 | break; | |
406 | } | |
69e65a9e JA |
407 | |
408 | /* | |
409 | * now we have both trace and payload, get a lock on the | |
410 | * output descriptor and send it off | |
411 | */ | |
d5396421 JA |
412 | tip_fd_lock(tip); |
413 | ||
db6fe5bc | 414 | if (write_data(tip->ofd, &t, sizeof(t))) { |
d5396421 | 415 | tip_fd_unlock(tip); |
db6fe5bc | 416 | break; |
d0ca268b JA |
417 | } |
418 | ||
db6fe5bc JA |
419 | if (pdu_data && write_data(tip->ofd, pdu_data, pdu_len)) { |
420 | tip_fd_unlock(tip); | |
421 | break; | |
422 | } | |
423 | ||
424 | tip_fd_unlock(tip); | |
d5396421 | 425 | |
db6fe5bc | 426 | if (pdu_data) { |
69e65a9e JA |
427 | free(pdu_data); |
428 | pdu_data = NULL; | |
429 | } | |
87b72777 | 430 | |
d0ca268b JA |
431 | tip->events_processed++; |
432 | } | |
433 | ||
db6fe5bc | 434 | exit_trace(1); |
d0ca268b JA |
435 | return NULL; |
436 | } | |
437 | ||
e7c9f3ff | 438 | static int start_threads(struct device_information *dip) |
d0ca268b JA |
439 | { |
440 | struct thread_information *tip; | |
d5396421 | 441 | char op[64]; |
e7c9f3ff | 442 | int j, pipeline = output_name && !strcmp(output_name, "-"); |
d1d7f15f | 443 | int len; |
d0ca268b | 444 | |
e7c9f3ff NS |
445 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { |
446 | tip->cpu = j; | |
447 | tip->device = dip; | |
d5396421 | 448 | tip->fd_lock = NULL; |
d0ca268b JA |
449 | tip->events_processed = 0; |
450 | ||
e7c9f3ff | 451 | if (pipeline) { |
1f79c4a0 | 452 | tip->ofd = dup(STDOUT_FILENO); |
d5396421 JA |
453 | tip->fd_lock = &stdout_mutex; |
454 | } else { | |
d1d7f15f JA |
455 | len = 0; |
456 | ||
457 | if (output_dir) | |
458 | len = sprintf(op, "%s/", output_dir); | |
459 | ||
9f6486bd | 460 | if (output_name) { |
d1d7f15f | 461 | sprintf(op + len, "%s.blktrace.%d", output_name, |
9f6486bd JA |
462 | tip->cpu); |
463 | } else { | |
d1d7f15f | 464 | sprintf(op + len, "%s.blktrace.%d", |
e7c9f3ff | 465 | dip->buts_name, tip->cpu); |
9f6486bd | 466 | } |
d5396421 JA |
467 | tip->ofd = open(op, O_CREAT|O_TRUNC|O_WRONLY, 0644); |
468 | } | |
469 | ||
470 | if (tip->ofd < 0) { | |
471 | perror(op); | |
e7c9f3ff | 472 | return 1; |
d5396421 JA |
473 | } |
474 | ||
d0ca268b | 475 | if (pthread_create(&tip->thread, NULL, extract, tip)) { |
e7c9f3ff NS |
476 | perror("pthread_create"); |
477 | close(tip->ofd); | |
478 | return 1; | |
d0ca268b JA |
479 | } |
480 | } | |
481 | ||
e7c9f3ff | 482 | return 0; |
d0ca268b JA |
483 | } |
484 | ||
72ca8801 NS |
485 | static void close_thread(struct thread_information *tip) |
486 | { | |
487 | if (tip->fd != -1) | |
488 | close(tip->fd); | |
489 | if (tip->ofd != -1) | |
490 | close(tip->ofd); | |
8a43bac5 | 491 | |
72ca8801 NS |
492 | tip->fd = tip->ofd = -1; |
493 | } | |
494 | ||
e7c9f3ff | 495 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 496 | { |
e7c9f3ff NS |
497 | struct thread_information *tip; |
498 | long ret; | |
499 | int j; | |
3aabcd89 | 500 | |
e7c9f3ff | 501 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { |
3aabcd89 JA |
502 | if (pthread_join(tip->thread, (void *) &ret)) |
503 | perror("thread_join"); | |
72ca8801 | 504 | close_thread(tip); |
3aabcd89 JA |
505 | } |
506 | } | |
507 | ||
e7c9f3ff | 508 | static void stop_all_threads(void) |
72ca8801 | 509 | { |
e7c9f3ff | 510 | struct device_information *dip; |
72ca8801 NS |
511 | int i; |
512 | ||
e7c9f3ff NS |
513 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) |
514 | stop_threads(dip); | |
515 | } | |
516 | ||
517 | static void stop_all_tracing(void) | |
518 | { | |
519 | struct device_information *dip; | |
520 | struct thread_information *tip; | |
521 | int i, j; | |
522 | ||
523 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
524 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) | |
525 | close_thread(tip); | |
526 | stop_trace(dip); | |
527 | } | |
72ca8801 NS |
528 | } |
529 | ||
530 | static void exit_trace(int status) | |
531 | { | |
e7c9f3ff | 532 | stop_all_tracing(); |
72ca8801 NS |
533 | exit(status); |
534 | } | |
535 | ||
e7c9f3ff NS |
536 | static int resize_devices(char *path) |
537 | { | |
538 | int size = (ndevs + 1) * sizeof(struct device_information); | |
539 | ||
540 | device_information = realloc(device_information, size); | |
541 | if (!device_information) { | |
542 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
543 | return 1; | |
544 | } | |
545 | device_information[ndevs].path = path; | |
546 | ndevs++; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static int open_devices(void) | |
d0ca268b | 551 | { |
e7c9f3ff | 552 | struct device_information *dip; |
d0ca268b | 553 | int i; |
d0ca268b | 554 | |
e7c9f3ff | 555 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { |
cf9208ea | 556 | dip->fd = open(dip->path, O_RDONLY | O_NONBLOCK); |
e7c9f3ff NS |
557 | if (dip->fd < 0) { |
558 | perror(dip->path); | |
559 | return 1; | |
560 | } | |
561 | } | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static int start_devices(void) | |
566 | { | |
567 | struct device_information *dip; | |
568 | int i, j, size; | |
569 | ||
570 | size = ncpus * sizeof(struct thread_information); | |
571 | thread_information = malloc(size * ndevs); | |
572 | if (!thread_information) { | |
573 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
574 | return 1; | |
575 | } | |
d5396421 | 576 | |
e7c9f3ff NS |
577 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { |
578 | if (start_trace(dip)) { | |
579 | close(dip->fd); | |
580 | fprintf(stderr, "Failed to start trace on %s\n", | |
581 | dip->path); | |
582 | break; | |
583 | } | |
584 | } | |
585 | if (i != ndevs) { | |
586 | for (dip = device_information, j = 0; j < i; j++, dip++) | |
587 | stop_trace(dip); | |
588 | return 1; | |
589 | } | |
590 | ||
591 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
592 | dip->threads = thread_information + (i * ncpus); | |
593 | if (start_threads(dip)) { | |
594 | fprintf(stderr, "Failed to start worker threads\n"); | |
595 | break; | |
596 | } | |
597 | } | |
598 | if (i != ndevs) { | |
599 | for (dip = device_information, j = 0; j < i; j++, dip++) | |
600 | stop_threads(dip); | |
601 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) | |
602 | stop_trace(dip); | |
603 | return 1; | |
d0ca268b JA |
604 | } |
605 | ||
e7c9f3ff | 606 | return 0; |
d0ca268b JA |
607 | } |
608 | ||
e7c9f3ff NS |
609 | static void show_stats(void) |
610 | { | |
611 | int i, j; | |
612 | struct device_information *dip; | |
613 | struct thread_information *tip; | |
614 | unsigned long long events_processed; | |
428683db | 615 | |
e7c9f3ff NS |
616 | if (output_name && !strcmp(output_name, "-")) |
617 | return; | |
618 | ||
619 | for (dip = device_information, i = 0; i < ndevs; i++, dip++) { | |
620 | printf("Device: %s\n", dip->path); | |
621 | events_processed = 0; | |
622 | for (tip = dip->threads, j = 0; j < ncpus; j++, tip++) { | |
623 | printf(" CPU%3d: %20ld events\n", | |
624 | tip->cpu, tip->events_processed); | |
625 | events_processed += tip->events_processed; | |
626 | } | |
627 | printf(" Total: %20lld events\n", events_processed); | |
628 | } | |
629 | } | |
52724a0e JA |
630 | |
631 | static char usage_str[] = \ | |
632 | "-d <dev> [ -r relay path ] [ -o <output> ] [-k ] [ -w time ]\n" \ | |
633 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ | |
634 | "\t-d Use specified device. May also be given last after options\n" \ | |
635 | "\t-r Path to mounted relayfs, defaults to /relay\n" \ | |
636 | "\t-o File(s) to send output to\n" \ | |
d1d7f15f | 637 | "\t-D Directory to prepend to output file names\n" \ |
52724a0e JA |
638 | "\t-k Kill a running trace\n" \ |
639 | "\t-w Stop after defined time, in seconds\n" \ | |
640 | "\t-a Only trace specified actions. See documentation\n" \ | |
641 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
642 | "\t-b Sub buffer size in KiB\n" \ |
643 | "\t-n Number of sub buffers\n" \ | |
52724a0e JA |
644 | "\t-v Print program version info\n\n"; |
645 | ||
ee1f4158 NS |
646 | static void show_usage(char *program) |
647 | { | |
52724a0e | 648 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 NS |
649 | } |
650 | ||
e820abd7 | 651 | static void handle_sigint(__attribute__((__unused__)) int sig) |
d0ca268b | 652 | { |
d0ca268b JA |
653 | done = 1; |
654 | } | |
655 | ||
656 | int main(int argc, char *argv[]) | |
657 | { | |
5270dddd | 658 | static char default_relay_path[] = "/relay"; |
e3e74029 | 659 | struct statfs st; |
d39c04ca | 660 | int i, c; |
ece238a6 | 661 | int stop_watch = 0; |
d39c04ca AB |
662 | int act_mask_tmp = 0; |
663 | ||
664 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
665 | switch (c) { | |
666 | case 'a': | |
667 | i = find_mask_map(optarg); | |
668 | if (i < 0) { | |
ab197ca7 | 669 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 670 | optarg); |
7425d456 | 671 | return 1; |
d39c04ca AB |
672 | } |
673 | act_mask_tmp |= i; | |
674 | break; | |
675 | ||
676 | case 'A': | |
98f8386b AB |
677 | if ((sscanf(optarg, "%x", &i) != 1) || |
678 | !valid_act_opt(i)) { | |
d39c04ca | 679 | fprintf(stderr, |
ab197ca7 | 680 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 681 | optarg, i); |
7425d456 | 682 | return 1; |
d39c04ca AB |
683 | } |
684 | act_mask_tmp = i; | |
685 | break; | |
d0ca268b | 686 | |
d39c04ca | 687 | case 'd': |
e7c9f3ff NS |
688 | if (resize_devices(optarg) != 0) |
689 | return 1; | |
d39c04ca AB |
690 | break; |
691 | ||
5270dddd JA |
692 | case 'r': |
693 | relay_path = optarg; | |
694 | break; | |
695 | ||
d5396421 | 696 | case 'o': |
66efebf8 | 697 | output_name = optarg; |
d5396421 | 698 | break; |
bc39777c JA |
699 | case 'k': |
700 | kill_running_trace = 1; | |
701 | break; | |
ece238a6 NS |
702 | case 'w': |
703 | stop_watch = atoi(optarg); | |
704 | if (stop_watch <= 0) { | |
705 | fprintf(stderr, | |
706 | "Invalid stopwatch value (%d secs)\n", | |
707 | stop_watch); | |
708 | return 1; | |
709 | } | |
710 | break; | |
57ea8602 | 711 | case 'V': |
52724a0e JA |
712 | printf("%s version %s\n", argv[0], blktrace_version); |
713 | return 0; | |
129aa440 JA |
714 | case 'b': |
715 | buf_size = atoi(optarg); | |
183a0855 | 716 | if (buf_size <= 0 || buf_size > 16*1024) { |
129aa440 JA |
717 | fprintf(stderr, |
718 | "Invalid buffer size (%d)\n", buf_size); | |
719 | return 1; | |
720 | } | |
721 | buf_size <<= 10; | |
722 | break; | |
723 | case 'n': | |
724 | buf_nr = atoi(optarg); | |
725 | if (buf_nr <= 0) { | |
726 | fprintf(stderr, | |
727 | "Invalid buffer nr (%d)\n", buf_nr); | |
728 | return 1; | |
729 | } | |
730 | break; | |
d1d7f15f JA |
731 | case 'D': |
732 | output_dir = optarg; | |
733 | break; | |
d39c04ca | 734 | default: |
ee1f4158 | 735 | show_usage(argv[0]); |
7425d456 | 736 | return 1; |
d39c04ca AB |
737 | } |
738 | } | |
739 | ||
e7c9f3ff NS |
740 | while (optind < argc) { |
741 | if (resize_devices(argv[optind++]) != 0) | |
742 | return 1; | |
743 | } | |
ee1f4158 | 744 | |
e7c9f3ff | 745 | if (ndevs == 0) { |
ee1f4158 | 746 | show_usage(argv[0]); |
7425d456 | 747 | return 1; |
d39c04ca AB |
748 | } |
749 | ||
5270dddd JA |
750 | if (!relay_path) |
751 | relay_path = default_relay_path; | |
752 | ||
d5396421 | 753 | if (act_mask_tmp != 0) |
d39c04ca | 754 | act_mask = act_mask_tmp; |
d0ca268b | 755 | |
e3e74029 NS |
756 | if (statfs(relay_path, &st) < 0) { |
757 | perror("statfs"); | |
758 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
759 | relay_path); | |
760 | return 1; | |
64acacae | 761 | } else if (st.f_type != (long) RELAYFS_TYPE) { |
e3e74029 | 762 | fprintf(stderr,"%s does not appear to be a relay filesystem\n", |
d0ca268b | 763 | relay_path); |
7425d456 | 764 | return 1; |
d0ca268b JA |
765 | } |
766 | ||
e7c9f3ff | 767 | if (open_devices() != 0) |
7425d456 | 768 | return 1; |
bc39777c JA |
769 | |
770 | if (kill_running_trace) { | |
e7c9f3ff | 771 | stop_all_traces(); |
7425d456 | 772 | return 0; |
bc39777c JA |
773 | } |
774 | ||
d0ca268b JA |
775 | setlocale(LC_NUMERIC, "en_US"); |
776 | ||
e7c9f3ff NS |
777 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
778 | if (ncpus < 0) { | |
779 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 780 | return 1; |
d0ca268b JA |
781 | } |
782 | ||
e7c9f3ff NS |
783 | if (start_devices() != 0) |
784 | return 1; | |
785 | ||
d0ca268b JA |
786 | signal(SIGINT, handle_sigint); |
787 | signal(SIGHUP, handle_sigint); | |
788 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 789 | signal(SIGALRM, handle_sigint); |
d0ca268b | 790 | |
e7c9f3ff | 791 | atexit(stop_all_tracing); |
830fd65c | 792 | |
ece238a6 NS |
793 | if (stop_watch) |
794 | alarm(stop_watch); | |
795 | ||
d0ca268b JA |
796 | while (!is_done()) |
797 | sleep(1); | |
798 | ||
e7c9f3ff NS |
799 | stop_all_threads(); |
800 | stop_all_traces(); | |
d0ca268b JA |
801 | show_stats(); |
802 | ||
803 | return 0; | |
804 | } | |
805 |