Commit | Line | Data |
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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> |
eb3c8108 | 32 | #include <sys/poll.h> |
d0ca268b JA |
33 | #include <stdio.h> |
34 | #include <stdlib.h> | |
35 | #include <sched.h> | |
d39c04ca AB |
36 | #include <ctype.h> |
37 | #include <getopt.h> | |
da39451f | 38 | #include <errno.h> |
a3e4d330 | 39 | #include <assert.h> |
d0ca268b JA |
40 | |
41 | #include "blktrace.h" | |
9db17354 | 42 | #include "list.h" |
d0ca268b | 43 | |
13d928f0 | 44 | static char blktrace_version[] = "0.99"; |
52724a0e | 45 | |
8f551a39 JA |
46 | /* |
47 | * You may want to increase this even more, if you are logging at a high | |
48 | * rate and see skipped/missed events | |
49 | */ | |
007c233c | 50 | #define BUF_SIZE (512 * 1024) |
d0ca268b JA |
51 | #define BUF_NR (4) |
52 | ||
007c233c JA |
53 | #define OFILE_BUF (128 * 1024) |
54 | ||
e3e74029 NS |
55 | #define RELAYFS_TYPE 0xF0B4A981 |
56 | ||
a3e4d330 | 57 | #define RING_INIT_NR (2) |
eb3c8108 | 58 | #define RING_MAX_NR (16UL) |
a3e4d330 | 59 | |
57ea8602 | 60 | #define S_OPTS "d:a:A:r:o:kw:Vb:n:D:" |
d5396421 | 61 | static struct option l_opts[] = { |
5c86134e | 62 | { |
d39c04ca | 63 | .name = "dev", |
428683db | 64 | .has_arg = required_argument, |
d39c04ca AB |
65 | .flag = NULL, |
66 | .val = 'd' | |
67 | }, | |
5c86134e | 68 | { |
d39c04ca | 69 | .name = "act-mask", |
428683db | 70 | .has_arg = required_argument, |
d39c04ca AB |
71 | .flag = NULL, |
72 | .val = 'a' | |
73 | }, | |
5c86134e | 74 | { |
d39c04ca | 75 | .name = "set-mask", |
428683db | 76 | .has_arg = required_argument, |
d39c04ca AB |
77 | .flag = NULL, |
78 | .val = 'A' | |
79 | }, | |
5c86134e | 80 | { |
5270dddd | 81 | .name = "relay", |
428683db | 82 | .has_arg = required_argument, |
5270dddd JA |
83 | .flag = NULL, |
84 | .val = 'r' | |
85 | }, | |
d5396421 JA |
86 | { |
87 | .name = "output", | |
428683db | 88 | .has_arg = required_argument, |
d5396421 JA |
89 | .flag = NULL, |
90 | .val = 'o' | |
91 | }, | |
bc39777c JA |
92 | { |
93 | .name = "kill", | |
428683db | 94 | .has_arg = no_argument, |
bc39777c JA |
95 | .flag = NULL, |
96 | .val = 'k' | |
97 | }, | |
ece238a6 NS |
98 | { |
99 | .name = "stopwatch", | |
428683db | 100 | .has_arg = required_argument, |
ece238a6 NS |
101 | .flag = NULL, |
102 | .val = 'w' | |
103 | }, | |
52724a0e JA |
104 | { |
105 | .name = "version", | |
106 | .has_arg = no_argument, | |
107 | .flag = NULL, | |
57ea8602 | 108 | .val = 'V' |
52724a0e | 109 | }, |
129aa440 | 110 | { |
3f65c585 | 111 | .name = "buffer-size", |
129aa440 JA |
112 | .has_arg = required_argument, |
113 | .flag = NULL, | |
114 | .val = 'b' | |
115 | }, | |
116 | { | |
3f65c585 | 117 | .name = "num-sub-buffers", |
129aa440 JA |
118 | .has_arg = required_argument, |
119 | .flag = NULL, | |
120 | .val = 'n' | |
121 | }, | |
d1d7f15f | 122 | { |
3f65c585 | 123 | .name = "output-dir", |
d1d7f15f JA |
124 | .has_arg = required_argument, |
125 | .flag = NULL, | |
126 | .val = 'D' | |
127 | }, | |
71ef8b7c JA |
128 | { |
129 | .name = NULL, | |
130 | } | |
d39c04ca AB |
131 | }; |
132 | ||
9db17354 JA |
133 | struct tip_subbuf { |
134 | struct list_head list; | |
135 | void *buf; | |
5be4bdaf JA |
136 | unsigned int len; |
137 | unsigned int max_len; | |
9db17354 JA |
138 | }; |
139 | ||
d0ca268b JA |
140 | struct thread_information { |
141 | int cpu; | |
142 | pthread_t thread; | |
b9d4294e JA |
143 | |
144 | int fd; | |
a3e4d330 JA |
145 | void *fd_buf; |
146 | unsigned long fd_off; | |
147 | unsigned long fd_size; | |
148 | unsigned long fd_max_size; | |
b9d4294e JA |
149 | char fn[MAXPATHLEN + 64]; |
150 | ||
007c233c JA |
151 | FILE *ofile; |
152 | char *ofile_buffer; | |
9db17354 | 153 | int ofile_stdout; |
007c233c | 154 | |
d0ca268b | 155 | unsigned long events_processed; |
e7c9f3ff | 156 | struct device_information *device; |
9db17354 JA |
157 | |
158 | int exited; | |
159 | ||
160 | pthread_mutex_t lock; | |
161 | struct list_head subbuf_list; | |
7de86b12 | 162 | struct tip_subbuf *leftover_ts; |
d0ca268b JA |
163 | }; |
164 | ||
e7c9f3ff NS |
165 | struct device_information { |
166 | int fd; | |
167 | char *path; | |
168 | char buts_name[32]; | |
99c1f5ab | 169 | volatile int trace_started; |
eb3c8108 | 170 | unsigned long drop_count; |
e7c9f3ff NS |
171 | struct thread_information *threads; |
172 | }; | |
d0ca268b | 173 | |
e7c9f3ff | 174 | static int ncpus; |
d0ca268b | 175 | static struct thread_information *thread_information; |
e7c9f3ff NS |
176 | static int ndevs; |
177 | static struct device_information *device_information; | |
178 | ||
179 | /* command line option globals */ | |
180 | static char *relay_path; | |
d5396421 | 181 | static char *output_name; |
d1d7f15f | 182 | static char *output_dir; |
5c86134e | 183 | static int act_mask = ~0U; |
bc39777c | 184 | static int kill_running_trace; |
eb3c8108 JA |
185 | static unsigned long buf_size = BUF_SIZE; |
186 | static unsigned long buf_nr = BUF_NR; | |
d39c04ca | 187 | |
e7c9f3ff NS |
188 | #define is_done() (*(volatile int *)(&done)) |
189 | static volatile int done; | |
190 | ||
eb3c8108 JA |
191 | #define is_trace_stopped() (*(volatile int *)(&trace_stopped)) |
192 | static volatile int trace_stopped; | |
193 | ||
194 | #define is_stat_shown() (*(volatile int *)(&stat_shown)) | |
195 | static volatile int stat_shown; | |
a3e4d330 | 196 | |
72ca8801 NS |
197 | static void exit_trace(int status); |
198 | ||
99c1f5ab JA |
199 | #define dip_tracing(dip) (*(volatile int *)(&(dip)->trace_started)) |
200 | #define dip_set_tracing(dip, v) ((dip)->trace_started = (v)) | |
201 | ||
202 | #define __for_each_dip(__d, __i, __e) \ | |
203 | for (__i = 0, __d = device_information; __i < __e; __i++, __d++) | |
204 | ||
205 | #define for_each_dip(__d, __i) __for_each_dip(__d, __i, ndevs) | |
9db17354 JA |
206 | #define for_each_tip(__d, __t, __j) \ |
207 | for (__j = 0, __t = (__d)->threads; __j < ncpus; __j++, __t++) | |
99c1f5ab | 208 | |
eb3c8108 JA |
209 | static int get_dropped_count(const char *buts_name) |
210 | { | |
211 | int fd; | |
212 | char tmp[MAXPATHLEN + 64]; | |
213 | ||
214 | snprintf(tmp, sizeof(tmp), "%s/block/%s/dropped", | |
215 | relay_path, buts_name); | |
216 | ||
217 | fd = open(tmp, O_RDONLY); | |
218 | if (fd < 0) { | |
219 | /* | |
220 | * this may be ok, if the kernel doesn't support dropped counts | |
221 | */ | |
222 | if (errno == ENOENT) | |
223 | return 0; | |
224 | ||
225 | fprintf(stderr, "Couldn't open dropped file %s\n", tmp); | |
226 | return -1; | |
227 | } | |
228 | ||
229 | if (read(fd, tmp, sizeof(tmp)) < 0) { | |
230 | perror(tmp); | |
231 | close(fd); | |
232 | return -1; | |
233 | } | |
234 | ||
235 | close(fd); | |
236 | ||
237 | return atoi(tmp); | |
238 | } | |
239 | ||
e7c9f3ff | 240 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
241 | { |
242 | struct blk_user_trace_setup buts; | |
243 | ||
1f79c4a0 | 244 | memset(&buts, 0, sizeof(buts)); |
129aa440 JA |
245 | buts.buf_size = buf_size; |
246 | buts.buf_nr = buf_nr; | |
d39c04ca | 247 | buts.act_mask = act_mask; |
d0ca268b | 248 | |
e7c9f3ff | 249 | if (ioctl(dip->fd, BLKSTARTTRACE, &buts) < 0) { |
d0ca268b JA |
250 | perror("BLKSTARTTRACE"); |
251 | return 1; | |
252 | } | |
253 | ||
e7c9f3ff | 254 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
99c1f5ab | 255 | dip_set_tracing(dip, 1); |
d0ca268b JA |
256 | return 0; |
257 | } | |
258 | ||
e7c9f3ff | 259 | static void stop_trace(struct device_information *dip) |
d0ca268b | 260 | { |
99c1f5ab JA |
261 | if (dip_tracing(dip) || kill_running_trace) { |
262 | dip_set_tracing(dip, 0); | |
cf9208ea | 263 | |
e7c9f3ff | 264 | if (ioctl(dip->fd, BLKSTOPTRACE) < 0) |
707b0914 | 265 | perror("BLKSTOPTRACE"); |
cf9208ea | 266 | |
e7c9f3ff | 267 | close(dip->fd); |
cf9208ea | 268 | dip->fd = -1; |
707b0914 | 269 | } |
d0ca268b JA |
270 | } |
271 | ||
e7c9f3ff NS |
272 | static void stop_all_traces(void) |
273 | { | |
274 | struct device_information *dip; | |
275 | int i; | |
276 | ||
eb3c8108 JA |
277 | for_each_dip(dip, i) { |
278 | dip->drop_count = get_dropped_count(dip->buts_name); | |
e7c9f3ff | 279 | stop_trace(dip); |
eb3c8108 | 280 | } |
e7c9f3ff NS |
281 | } |
282 | ||
eb3c8108 JA |
283 | static void wait_for_data(struct thread_information *tip) |
284 | { | |
285 | struct pollfd pfd = { .fd = tip->fd, .events = POLLIN }; | |
286 | ||
9db17354 | 287 | do { |
b4aabcb3 | 288 | poll(&pfd, 1, 100); |
9db17354 JA |
289 | if (pfd.revents & POLLIN) |
290 | break; | |
291 | if (tip->ofile_stdout) | |
292 | break; | |
293 | } while (!is_done()); | |
eb3c8108 JA |
294 | } |
295 | ||
9db17354 | 296 | static int read_data(struct thread_information *tip, void *buf, int len) |
d0ca268b | 297 | { |
ae9f71b3 | 298 | int ret = 0; |
bbabf03a | 299 | |
9db17354 JA |
300 | do { |
301 | wait_for_data(tip); | |
ae9f71b3 | 302 | |
9db17354 JA |
303 | ret = read(tip->fd, buf, len); |
304 | if (!ret) | |
305 | continue; | |
306 | else if (ret > 0) | |
307 | return ret; | |
308 | else { | |
bbabf03a | 309 | if (errno != EAGAIN) { |
a3e4d330 JA |
310 | perror(tip->fn); |
311 | fprintf(stderr,"Thread %d failed read of %s\n", | |
312 | tip->cpu, tip->fn); | |
313 | break; | |
314 | } | |
9db17354 | 315 | continue; |
bbabf03a | 316 | } |
9db17354 | 317 | } while (!is_done()); |
8a43bac5 | 318 | |
bbabf03a | 319 | return ret; |
8a43bac5 JA |
320 | } |
321 | ||
9db17354 | 322 | static inline void tip_fd_unlock(struct thread_information *tip) |
a3e4d330 | 323 | { |
9db17354 JA |
324 | pthread_mutex_unlock(&tip->lock); |
325 | } | |
eb3c8108 | 326 | |
9db17354 JA |
327 | static inline void tip_fd_lock(struct thread_information *tip) |
328 | { | |
329 | pthread_mutex_lock(&tip->lock); | |
a3e4d330 JA |
330 | } |
331 | ||
9db17354 | 332 | static int get_subbuf(struct thread_information *tip) |
a3e4d330 | 333 | { |
9db17354 | 334 | struct tip_subbuf *ts; |
b4aabcb3 | 335 | int ret; |
a3e4d330 | 336 | |
9db17354 | 337 | ts = malloc(sizeof(*ts)); |
b4aabcb3 JA |
338 | ts->buf = malloc(buf_size); |
339 | ts->max_len = buf_size; | |
a3e4d330 | 340 | |
b4aabcb3 | 341 | ret = read_data(tip, ts->buf, ts->max_len); |
5be4bdaf JA |
342 | if (ret > 0) { |
343 | ts->len = ret; | |
9db17354 JA |
344 | tip_fd_lock(tip); |
345 | list_add_tail(&ts->list, &tip->subbuf_list); | |
346 | tip_fd_unlock(tip); | |
347 | return 0; | |
348 | } | |
a3e4d330 | 349 | |
9db17354 JA |
350 | free(ts->buf); |
351 | free(ts); | |
352 | return -1; | |
a3e4d330 JA |
353 | } |
354 | ||
9db17354 | 355 | static void close_thread(struct thread_information *tip) |
a3e4d330 | 356 | { |
9db17354 JA |
357 | if (tip->fd != -1) |
358 | close(tip->fd); | |
359 | if (tip->ofile) | |
360 | fclose(tip->ofile); | |
361 | if (tip->ofile_buffer) | |
362 | free(tip->ofile_buffer); | |
363 | if (tip->fd_buf) | |
364 | free(tip->fd_buf); | |
1c99bc21 | 365 | |
9db17354 JA |
366 | tip->fd = -1; |
367 | tip->ofile = NULL; | |
368 | tip->ofile_buffer = NULL; | |
369 | tip->fd_buf = NULL; | |
a3e4d330 JA |
370 | } |
371 | ||
9db17354 | 372 | static void *thread_main(void *arg) |
a3e4d330 | 373 | { |
9db17354 JA |
374 | struct thread_information *tip = arg; |
375 | pid_t pid = getpid(); | |
376 | cpu_set_t cpu_mask; | |
a3e4d330 | 377 | |
9db17354 JA |
378 | CPU_ZERO(&cpu_mask); |
379 | CPU_SET((tip->cpu), &cpu_mask); | |
a3e4d330 | 380 | |
9db17354 JA |
381 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { |
382 | perror("sched_setaffinity"); | |
383 | exit_trace(1); | |
384 | } | |
a3e4d330 | 385 | |
9db17354 JA |
386 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
387 | relay_path, tip->device->buts_name, tip->cpu); | |
388 | tip->fd = open(tip->fn, O_RDONLY); | |
389 | if (tip->fd < 0) { | |
390 | perror(tip->fn); | |
391 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, | |
392 | tip->fn); | |
393 | exit_trace(1); | |
a3e4d330 JA |
394 | } |
395 | ||
9db17354 JA |
396 | for (;;) { |
397 | if (get_subbuf(tip)) | |
398 | break; | |
399 | } | |
a3e4d330 | 400 | |
9db17354 JA |
401 | tip->exited = 1; |
402 | return NULL; | |
a3e4d330 JA |
403 | } |
404 | ||
7126171a JA |
405 | static int write_data(struct thread_information *tip, |
406 | void *buf, unsigned int buf_len) | |
8a43bac5 | 407 | { |
7126171a | 408 | int ret; |
8a43bac5 | 409 | |
7126171a JA |
410 | while (1) { |
411 | ret = fwrite(buf, buf_len, 1, tip->ofile); | |
007c233c | 412 | if (ret == 1) |
8a43bac5 JA |
413 | break; |
414 | ||
db6fe5bc JA |
415 | if (ret < 0) { |
416 | perror("write"); | |
417 | return 1; | |
8a43bac5 | 418 | } |
d0ca268b JA |
419 | } |
420 | ||
9db17354 | 421 | if (tip->ofile_stdout) |
7126171a JA |
422 | fflush(tip->ofile); |
423 | ||
8a43bac5 JA |
424 | return 0; |
425 | } | |
426 | ||
9db17354 | 427 | static int flush_subbuf(struct thread_information *tip, struct tip_subbuf *ts) |
8a43bac5 | 428 | { |
9db17354 JA |
429 | unsigned int offset = 0; |
430 | struct blk_io_trace *t; | |
431 | int pdu_len, events = 0; | |
8a43bac5 | 432 | |
9db17354 | 433 | /* |
7de86b12 | 434 | * surplus from last run |
9db17354 | 435 | */ |
7de86b12 AB |
436 | if (tip->leftover_ts) { |
437 | struct tip_subbuf *prev_ts = tip->leftover_ts; | |
438 | ||
9e8b753c | 439 | if (prev_ts->len + ts->len > prev_ts->max_len) { |
7de86b12 AB |
440 | prev_ts->max_len += ts->len; |
441 | prev_ts->buf = realloc(prev_ts->buf, prev_ts->max_len); | |
442 | } | |
443 | ||
9e8b753c | 444 | memcpy(prev_ts->buf + prev_ts->len, ts->buf, ts->len); |
7de86b12 AB |
445 | prev_ts->len += ts->len; |
446 | ||
447 | free(ts->buf); | |
448 | free(ts); | |
449 | ||
450 | ts = prev_ts; | |
451 | tip->leftover_ts = NULL; | |
9db17354 | 452 | } |
d0ca268b | 453 | |
9db17354 JA |
454 | while (offset + sizeof(*t) <= ts->len) { |
455 | t = ts->buf + offset; | |
3a9d6c13 | 456 | |
9db17354 JA |
457 | if (verify_trace(t)) |
458 | return -1; | |
3a9d6c13 | 459 | |
9db17354 | 460 | pdu_len = t->pdu_len; |
3a9d6c13 | 461 | |
9db17354 | 462 | if (offset + sizeof(*t) + pdu_len > ts->len) |
3a9d6c13 | 463 | break; |
4b5db44a | 464 | |
9db17354 | 465 | trace_to_be(t); |
3a9d6c13 | 466 | |
9db17354 JA |
467 | if (write_data(tip, t, sizeof(*t) + pdu_len)) |
468 | return -1; | |
3a9d6c13 | 469 | |
9db17354 JA |
470 | offset += sizeof(*t) + pdu_len; |
471 | tip->events_processed++; | |
472 | events++; | |
3a9d6c13 JA |
473 | } |
474 | ||
475 | /* | |
9db17354 | 476 | * leftover bytes, save them for next time |
3a9d6c13 | 477 | */ |
9db17354 | 478 | if (offset != ts->len) { |
7de86b12 | 479 | tip->leftover_ts = ts; |
9e8b753c JA |
480 | ts->len -= offset; |
481 | memmove(ts->buf, ts->buf + offset, ts->len); | |
7de86b12 AB |
482 | } else { |
483 | free(ts->buf); | |
484 | free(ts); | |
9db17354 | 485 | } |
4b5db44a | 486 | |
9db17354 | 487 | return events; |
4b5db44a JA |
488 | } |
489 | ||
9db17354 | 490 | static int write_tip_events(struct thread_information *tip) |
d5396421 | 491 | { |
9db17354 | 492 | struct tip_subbuf *ts = NULL; |
d5396421 | 493 | |
9db17354 JA |
494 | tip_fd_lock(tip); |
495 | if (!list_empty(&tip->subbuf_list)) { | |
496 | ts = list_entry(tip->subbuf_list.next, struct tip_subbuf, list); | |
497 | list_del(&ts->list); | |
498 | } | |
499 | tip_fd_unlock(tip); | |
d5396421 | 500 | |
9db17354 JA |
501 | if (ts) |
502 | return flush_subbuf(tip, ts); | |
91816d54 | 503 | |
9db17354 | 504 | return 0; |
91816d54 JA |
505 | } |
506 | ||
9db17354 JA |
507 | /* |
508 | * scans the tips we know and writes out the subbuffers we accumulate | |
509 | */ | |
510 | static void get_and_write_events(void) | |
d0ca268b | 511 | { |
9db17354 JA |
512 | struct device_information *dip; |
513 | struct thread_information *tip; | |
27223f19 | 514 | int i, j, events, ret, tips_running; |
d0ca268b | 515 | |
9db17354 JA |
516 | while (!is_done()) { |
517 | events = 0; | |
d0ca268b | 518 | |
9db17354 JA |
519 | for_each_dip(dip, i) { |
520 | for_each_tip(dip, tip, j) { | |
521 | ret = write_tip_events(tip); | |
522 | if (ret > 0) | |
523 | events += ret; | |
524 | } | |
525 | } | |
d0ca268b | 526 | |
9db17354 JA |
527 | if (!events) |
528 | usleep(10); | |
d0ca268b JA |
529 | } |
530 | ||
a3e4d330 | 531 | /* |
9db17354 | 532 | * reap stored events |
a3e4d330 | 533 | */ |
9db17354 JA |
534 | do { |
535 | events = 0; | |
27223f19 | 536 | tips_running = 0; |
9db17354 JA |
537 | for_each_dip(dip, i) { |
538 | for_each_tip(dip, tip, j) { | |
539 | ret = write_tip_events(tip); | |
540 | if (ret > 0) | |
541 | events += ret; | |
27223f19 | 542 | tips_running += !tip->exited; |
9db17354 | 543 | } |
69e65a9e | 544 | } |
9db17354 | 545 | usleep(10); |
27223f19 | 546 | } while (events || tips_running); |
d0ca268b JA |
547 | } |
548 | ||
e7c9f3ff | 549 | static int start_threads(struct device_information *dip) |
d0ca268b JA |
550 | { |
551 | struct thread_information *tip; | |
d5396421 | 552 | char op[64]; |
e7c9f3ff | 553 | int j, pipeline = output_name && !strcmp(output_name, "-"); |
57e8a2ad | 554 | int len, mode, vbuf_size; |
d0ca268b | 555 | |
99c1f5ab | 556 | for_each_tip(dip, tip, j) { |
e7c9f3ff NS |
557 | tip->cpu = j; |
558 | tip->device = dip; | |
d0ca268b | 559 | tip->events_processed = 0; |
74b92379 | 560 | pthread_mutex_init(&tip->lock, NULL); |
9db17354 | 561 | INIT_LIST_HEAD(&tip->subbuf_list); |
9db17354 | 562 | tip->leftover_ts = NULL; |
d0ca268b | 563 | |
e7c9f3ff | 564 | if (pipeline) { |
007c233c | 565 | tip->ofile = fdopen(STDOUT_FILENO, "w"); |
9db17354 | 566 | tip->ofile_stdout = 1; |
007c233c | 567 | mode = _IOLBF; |
57e8a2ad | 568 | vbuf_size = 512; |
d5396421 | 569 | } else { |
d1d7f15f JA |
570 | len = 0; |
571 | ||
572 | if (output_dir) | |
573 | len = sprintf(op, "%s/", output_dir); | |
574 | ||
9f6486bd | 575 | if (output_name) { |
d1d7f15f | 576 | sprintf(op + len, "%s.blktrace.%d", output_name, |
9f6486bd JA |
577 | tip->cpu); |
578 | } else { | |
d1d7f15f | 579 | sprintf(op + len, "%s.blktrace.%d", |
e7c9f3ff | 580 | dip->buts_name, tip->cpu); |
9f6486bd | 581 | } |
007c233c | 582 | tip->ofile = fopen(op, "w"); |
9db17354 | 583 | tip->ofile_stdout = 0; |
007c233c | 584 | mode = _IOFBF; |
57e8a2ad | 585 | vbuf_size = OFILE_BUF; |
d5396421 JA |
586 | } |
587 | ||
007c233c | 588 | if (tip->ofile == NULL) { |
d5396421 | 589 | perror(op); |
e7c9f3ff | 590 | return 1; |
d5396421 JA |
591 | } |
592 | ||
57e8a2ad TZ |
593 | tip->ofile_buffer = malloc(vbuf_size); |
594 | if (setvbuf(tip->ofile, tip->ofile_buffer, mode, vbuf_size)) { | |
007c233c JA |
595 | perror("setvbuf"); |
596 | close_thread(tip); | |
597 | return 1; | |
598 | } | |
599 | ||
9db17354 | 600 | if (pthread_create(&tip->thread, NULL, thread_main, tip)) { |
e7c9f3ff | 601 | perror("pthread_create"); |
007c233c | 602 | close_thread(tip); |
e7c9f3ff | 603 | return 1; |
d0ca268b JA |
604 | } |
605 | } | |
606 | ||
e7c9f3ff | 607 | return 0; |
d0ca268b JA |
608 | } |
609 | ||
e7c9f3ff | 610 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 611 | { |
e7c9f3ff | 612 | struct thread_information *tip; |
91816d54 | 613 | unsigned long ret; |
007c233c JA |
614 | int i; |
615 | ||
9db17354 | 616 | for_each_tip(dip, tip, i) { |
91816d54 | 617 | (void) pthread_join(tip->thread, (void *) &ret); |
9db17354 JA |
618 | close_thread(tip); |
619 | } | |
3aabcd89 JA |
620 | } |
621 | ||
e7c9f3ff | 622 | static void stop_all_threads(void) |
72ca8801 | 623 | { |
e7c9f3ff | 624 | struct device_information *dip; |
72ca8801 NS |
625 | int i; |
626 | ||
99c1f5ab | 627 | for_each_dip(dip, i) |
e7c9f3ff NS |
628 | stop_threads(dip); |
629 | } | |
630 | ||
631 | static void stop_all_tracing(void) | |
632 | { | |
633 | struct device_information *dip; | |
91816d54 | 634 | int i; |
007c233c | 635 | |
91816d54 | 636 | for_each_dip(dip, i) |
e7c9f3ff | 637 | stop_trace(dip); |
72ca8801 NS |
638 | } |
639 | ||
640 | static void exit_trace(int status) | |
641 | { | |
eb3c8108 JA |
642 | if (!is_trace_stopped()) { |
643 | trace_stopped = 1; | |
644 | stop_all_threads(); | |
645 | stop_all_tracing(); | |
646 | } | |
647 | ||
72ca8801 NS |
648 | exit(status); |
649 | } | |
650 | ||
e7c9f3ff NS |
651 | static int resize_devices(char *path) |
652 | { | |
653 | int size = (ndevs + 1) * sizeof(struct device_information); | |
654 | ||
655 | device_information = realloc(device_information, size); | |
656 | if (!device_information) { | |
657 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
658 | return 1; | |
659 | } | |
660 | device_information[ndevs].path = path; | |
661 | ndevs++; | |
662 | return 0; | |
663 | } | |
664 | ||
665 | static int open_devices(void) | |
d0ca268b | 666 | { |
e7c9f3ff | 667 | struct device_information *dip; |
d0ca268b | 668 | int i; |
d0ca268b | 669 | |
99c1f5ab | 670 | for_each_dip(dip, i) { |
cf9208ea | 671 | dip->fd = open(dip->path, O_RDONLY | O_NONBLOCK); |
e7c9f3ff NS |
672 | if (dip->fd < 0) { |
673 | perror(dip->path); | |
674 | return 1; | |
675 | } | |
676 | } | |
99c1f5ab | 677 | |
e7c9f3ff NS |
678 | return 0; |
679 | } | |
680 | ||
681 | static int start_devices(void) | |
682 | { | |
683 | struct device_information *dip; | |
684 | int i, j, size; | |
685 | ||
686 | size = ncpus * sizeof(struct thread_information); | |
687 | thread_information = malloc(size * ndevs); | |
688 | if (!thread_information) { | |
689 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
690 | return 1; | |
691 | } | |
d5396421 | 692 | |
99c1f5ab | 693 | for_each_dip(dip, i) { |
e7c9f3ff NS |
694 | if (start_trace(dip)) { |
695 | close(dip->fd); | |
696 | fprintf(stderr, "Failed to start trace on %s\n", | |
697 | dip->path); | |
698 | break; | |
699 | } | |
700 | } | |
99c1f5ab | 701 | |
e7c9f3ff | 702 | if (i != ndevs) { |
99c1f5ab | 703 | __for_each_dip(dip, j, i) |
e7c9f3ff | 704 | stop_trace(dip); |
99c1f5ab | 705 | |
e7c9f3ff NS |
706 | return 1; |
707 | } | |
708 | ||
99c1f5ab | 709 | for_each_dip(dip, i) { |
e7c9f3ff NS |
710 | dip->threads = thread_information + (i * ncpus); |
711 | if (start_threads(dip)) { | |
712 | fprintf(stderr, "Failed to start worker threads\n"); | |
713 | break; | |
714 | } | |
715 | } | |
99c1f5ab | 716 | |
e7c9f3ff | 717 | if (i != ndevs) { |
99c1f5ab | 718 | __for_each_dip(dip, j, i) |
e7c9f3ff | 719 | stop_threads(dip); |
99c1f5ab | 720 | for_each_dip(dip, i) |
e7c9f3ff | 721 | stop_trace(dip); |
99c1f5ab | 722 | |
e7c9f3ff | 723 | return 1; |
d0ca268b JA |
724 | } |
725 | ||
e7c9f3ff | 726 | return 0; |
d0ca268b JA |
727 | } |
728 | ||
e7c9f3ff NS |
729 | static void show_stats(void) |
730 | { | |
e7c9f3ff NS |
731 | struct device_information *dip; |
732 | struct thread_information *tip; | |
733 | unsigned long long events_processed; | |
eb3c8108 | 734 | unsigned long total_drops; |
2f903295 | 735 | int i, j, no_stdout = 0; |
eb3c8108 JA |
736 | |
737 | if (is_stat_shown()) | |
738 | return; | |
739 | ||
2f903295 JA |
740 | if (output_name && !strcmp(output_name, "-")) |
741 | no_stdout = 1; | |
742 | ||
eb3c8108 | 743 | stat_shown = 1; |
428683db | 744 | |
56070ea4 | 745 | total_drops = 0; |
99c1f5ab | 746 | for_each_dip(dip, i) { |
2f903295 | 747 | if (!no_stdout) |
56070ea4 | 748 | printf("Device: %s\n", dip->path); |
e7c9f3ff | 749 | events_processed = 0; |
99c1f5ab | 750 | for_each_tip(dip, tip, j) { |
2f903295 | 751 | if (!no_stdout) |
56070ea4 JA |
752 | printf(" CPU%3d: %20ld events\n", |
753 | tip->cpu, tip->events_processed); | |
e7c9f3ff NS |
754 | events_processed += tip->events_processed; |
755 | } | |
eb3c8108 | 756 | total_drops += dip->drop_count; |
2f903295 | 757 | if (!no_stdout) |
eb3c8108 JA |
758 | printf(" Total: %20lld events (dropped %lu)\n", |
759 | events_processed, dip->drop_count); | |
e7c9f3ff | 760 | } |
56070ea4 JA |
761 | |
762 | if (total_drops) | |
763 | fprintf(stderr, "You have dropped events, consider using a larger buffer size (-b)\n"); | |
e7c9f3ff | 764 | } |
52724a0e JA |
765 | |
766 | static char usage_str[] = \ | |
767 | "-d <dev> [ -r relay path ] [ -o <output> ] [-k ] [ -w time ]\n" \ | |
768 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ | |
769 | "\t-d Use specified device. May also be given last after options\n" \ | |
770 | "\t-r Path to mounted relayfs, defaults to /relay\n" \ | |
771 | "\t-o File(s) to send output to\n" \ | |
d1d7f15f | 772 | "\t-D Directory to prepend to output file names\n" \ |
52724a0e JA |
773 | "\t-k Kill a running trace\n" \ |
774 | "\t-w Stop after defined time, in seconds\n" \ | |
775 | "\t-a Only trace specified actions. See documentation\n" \ | |
776 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
777 | "\t-b Sub buffer size in KiB\n" \ |
778 | "\t-n Number of sub buffers\n" \ | |
52724a0e JA |
779 | "\t-v Print program version info\n\n"; |
780 | ||
ee1f4158 NS |
781 | static void show_usage(char *program) |
782 | { | |
52724a0e | 783 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 | 784 | } |
e820abd7 | 785 | static void handle_sigint(__attribute__((__unused__)) int sig) |
d0ca268b | 786 | { |
d0ca268b JA |
787 | done = 1; |
788 | } | |
789 | ||
790 | int main(int argc, char *argv[]) | |
791 | { | |
5270dddd | 792 | static char default_relay_path[] = "/relay"; |
e3e74029 | 793 | struct statfs st; |
d39c04ca | 794 | int i, c; |
ece238a6 | 795 | int stop_watch = 0; |
d39c04ca AB |
796 | int act_mask_tmp = 0; |
797 | ||
798 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
799 | switch (c) { | |
800 | case 'a': | |
801 | i = find_mask_map(optarg); | |
802 | if (i < 0) { | |
ab197ca7 | 803 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 804 | optarg); |
7425d456 | 805 | return 1; |
d39c04ca AB |
806 | } |
807 | act_mask_tmp |= i; | |
808 | break; | |
809 | ||
810 | case 'A': | |
98f8386b AB |
811 | if ((sscanf(optarg, "%x", &i) != 1) || |
812 | !valid_act_opt(i)) { | |
d39c04ca | 813 | fprintf(stderr, |
ab197ca7 | 814 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 815 | optarg, i); |
7425d456 | 816 | return 1; |
d39c04ca AB |
817 | } |
818 | act_mask_tmp = i; | |
819 | break; | |
d0ca268b | 820 | |
d39c04ca | 821 | case 'd': |
e7c9f3ff NS |
822 | if (resize_devices(optarg) != 0) |
823 | return 1; | |
d39c04ca AB |
824 | break; |
825 | ||
5270dddd JA |
826 | case 'r': |
827 | relay_path = optarg; | |
828 | break; | |
829 | ||
d5396421 | 830 | case 'o': |
66efebf8 | 831 | output_name = optarg; |
d5396421 | 832 | break; |
bc39777c JA |
833 | case 'k': |
834 | kill_running_trace = 1; | |
835 | break; | |
ece238a6 NS |
836 | case 'w': |
837 | stop_watch = atoi(optarg); | |
838 | if (stop_watch <= 0) { | |
839 | fprintf(stderr, | |
840 | "Invalid stopwatch value (%d secs)\n", | |
841 | stop_watch); | |
842 | return 1; | |
843 | } | |
844 | break; | |
57ea8602 | 845 | case 'V': |
52724a0e JA |
846 | printf("%s version %s\n", argv[0], blktrace_version); |
847 | return 0; | |
129aa440 | 848 | case 'b': |
eb3c8108 | 849 | buf_size = strtoul(optarg, NULL, 10); |
183a0855 | 850 | if (buf_size <= 0 || buf_size > 16*1024) { |
129aa440 | 851 | fprintf(stderr, |
eb3c8108 | 852 | "Invalid buffer size (%lu)\n",buf_size); |
129aa440 JA |
853 | return 1; |
854 | } | |
855 | buf_size <<= 10; | |
856 | break; | |
857 | case 'n': | |
eb3c8108 | 858 | buf_nr = strtoul(optarg, NULL, 10); |
129aa440 JA |
859 | if (buf_nr <= 0) { |
860 | fprintf(stderr, | |
eb3c8108 | 861 | "Invalid buffer nr (%lu)\n", buf_nr); |
129aa440 JA |
862 | return 1; |
863 | } | |
864 | break; | |
d1d7f15f JA |
865 | case 'D': |
866 | output_dir = optarg; | |
867 | break; | |
d39c04ca | 868 | default: |
ee1f4158 | 869 | show_usage(argv[0]); |
7425d456 | 870 | return 1; |
d39c04ca AB |
871 | } |
872 | } | |
873 | ||
e7c9f3ff NS |
874 | while (optind < argc) { |
875 | if (resize_devices(argv[optind++]) != 0) | |
876 | return 1; | |
877 | } | |
ee1f4158 | 878 | |
e7c9f3ff | 879 | if (ndevs == 0) { |
ee1f4158 | 880 | show_usage(argv[0]); |
7425d456 | 881 | return 1; |
d39c04ca AB |
882 | } |
883 | ||
5270dddd JA |
884 | if (!relay_path) |
885 | relay_path = default_relay_path; | |
886 | ||
d5396421 | 887 | if (act_mask_tmp != 0) |
d39c04ca | 888 | act_mask = act_mask_tmp; |
d0ca268b | 889 | |
e3e74029 NS |
890 | if (statfs(relay_path, &st) < 0) { |
891 | perror("statfs"); | |
892 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
893 | relay_path); | |
894 | return 1; | |
64acacae | 895 | } else if (st.f_type != (long) RELAYFS_TYPE) { |
e3e74029 | 896 | fprintf(stderr,"%s does not appear to be a relay filesystem\n", |
d0ca268b | 897 | relay_path); |
7425d456 | 898 | return 1; |
d0ca268b JA |
899 | } |
900 | ||
e7c9f3ff | 901 | if (open_devices() != 0) |
7425d456 | 902 | return 1; |
bc39777c JA |
903 | |
904 | if (kill_running_trace) { | |
e7c9f3ff | 905 | stop_all_traces(); |
7425d456 | 906 | return 0; |
bc39777c JA |
907 | } |
908 | ||
d0ca268b JA |
909 | setlocale(LC_NUMERIC, "en_US"); |
910 | ||
e7c9f3ff NS |
911 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
912 | if (ncpus < 0) { | |
913 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 914 | return 1; |
d0ca268b JA |
915 | } |
916 | ||
e7c9f3ff NS |
917 | if (start_devices() != 0) |
918 | return 1; | |
919 | ||
d0ca268b JA |
920 | signal(SIGINT, handle_sigint); |
921 | signal(SIGHUP, handle_sigint); | |
922 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 923 | signal(SIGALRM, handle_sigint); |
d0ca268b | 924 | |
e7c9f3ff | 925 | atexit(stop_all_tracing); |
830fd65c | 926 | |
ece238a6 NS |
927 | if (stop_watch) |
928 | alarm(stop_watch); | |
929 | ||
9db17354 | 930 | get_and_write_events(); |
d0ca268b | 931 | |
eb3c8108 JA |
932 | if (!is_trace_stopped()) { |
933 | trace_stopped = 1; | |
91816d54 JA |
934 | stop_all_threads(); |
935 | stop_all_traces(); | |
91816d54 | 936 | } |
d0ca268b | 937 | |
eb3c8108 JA |
938 | show_stats(); |
939 | ||
d0ca268b JA |
940 | return 0; |
941 | } | |
942 |