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> |
b7106311 | 33 | #include <sys/mman.h> |
8e86c98a | 34 | #include <sys/socket.h> |
d0ca268b JA |
35 | #include <stdio.h> |
36 | #include <stdlib.h> | |
37 | #include <sched.h> | |
d39c04ca AB |
38 | #include <ctype.h> |
39 | #include <getopt.h> | |
da39451f | 40 | #include <errno.h> |
8e86c98a JA |
41 | #include <netinet/in.h> |
42 | #include <arpa/inet.h> | |
43 | #include <netdb.h> | |
32f18c48 | 44 | #include <sys/sendfile.h> |
d0ca268b JA |
45 | |
46 | #include "blktrace.h" | |
21f55651 | 47 | #include "barrier.h" |
d0ca268b | 48 | |
13d928f0 | 49 | static char blktrace_version[] = "0.99"; |
52724a0e | 50 | |
8f551a39 JA |
51 | /* |
52 | * You may want to increase this even more, if you are logging at a high | |
53 | * rate and see skipped/missed events | |
54 | */ | |
007c233c | 55 | #define BUF_SIZE (512 * 1024) |
d0ca268b JA |
56 | #define BUF_NR (4) |
57 | ||
007c233c JA |
58 | #define OFILE_BUF (128 * 1024) |
59 | ||
e3e74029 NS |
60 | #define RELAYFS_TYPE 0xF0B4A981 |
61 | ||
32f18c48 | 62 | #define S_OPTS "d:a:A:r:o:kw:Vb:n:D:lh:p:s" |
d5396421 | 63 | static struct option l_opts[] = { |
5c86134e | 64 | { |
d39c04ca | 65 | .name = "dev", |
428683db | 66 | .has_arg = required_argument, |
d39c04ca AB |
67 | .flag = NULL, |
68 | .val = 'd' | |
69 | }, | |
5c86134e | 70 | { |
d39c04ca | 71 | .name = "act-mask", |
428683db | 72 | .has_arg = required_argument, |
d39c04ca AB |
73 | .flag = NULL, |
74 | .val = 'a' | |
75 | }, | |
5c86134e | 76 | { |
d39c04ca | 77 | .name = "set-mask", |
428683db | 78 | .has_arg = required_argument, |
d39c04ca AB |
79 | .flag = NULL, |
80 | .val = 'A' | |
81 | }, | |
5c86134e | 82 | { |
5270dddd | 83 | .name = "relay", |
428683db | 84 | .has_arg = required_argument, |
5270dddd JA |
85 | .flag = NULL, |
86 | .val = 'r' | |
87 | }, | |
d5396421 JA |
88 | { |
89 | .name = "output", | |
428683db | 90 | .has_arg = required_argument, |
d5396421 JA |
91 | .flag = NULL, |
92 | .val = 'o' | |
93 | }, | |
bc39777c JA |
94 | { |
95 | .name = "kill", | |
428683db | 96 | .has_arg = no_argument, |
bc39777c JA |
97 | .flag = NULL, |
98 | .val = 'k' | |
99 | }, | |
ece238a6 NS |
100 | { |
101 | .name = "stopwatch", | |
428683db | 102 | .has_arg = required_argument, |
ece238a6 NS |
103 | .flag = NULL, |
104 | .val = 'w' | |
105 | }, | |
52724a0e JA |
106 | { |
107 | .name = "version", | |
108 | .has_arg = no_argument, | |
109 | .flag = NULL, | |
57ea8602 | 110 | .val = 'V' |
52724a0e | 111 | }, |
129aa440 | 112 | { |
3f65c585 | 113 | .name = "buffer-size", |
129aa440 JA |
114 | .has_arg = required_argument, |
115 | .flag = NULL, | |
116 | .val = 'b' | |
117 | }, | |
118 | { | |
3f65c585 | 119 | .name = "num-sub-buffers", |
129aa440 JA |
120 | .has_arg = required_argument, |
121 | .flag = NULL, | |
122 | .val = 'n' | |
123 | }, | |
d1d7f15f | 124 | { |
3f65c585 | 125 | .name = "output-dir", |
d1d7f15f JA |
126 | .has_arg = required_argument, |
127 | .flag = NULL, | |
128 | .val = 'D' | |
129 | }, | |
8e86c98a JA |
130 | { |
131 | .name = "listen", | |
132 | .has_arg = no_argument, | |
133 | .flag = NULL, | |
134 | .val = 'l' | |
135 | }, | |
136 | { | |
137 | .name = "host", | |
138 | .has_arg = required_argument, | |
139 | .flag = NULL, | |
140 | .val = 'h' | |
141 | }, | |
142 | { | |
143 | .name = "port", | |
144 | .has_arg = required_argument, | |
145 | .flag = NULL, | |
146 | .val = 'p' | |
147 | }, | |
32f18c48 JA |
148 | { |
149 | .name = "sendfile", | |
150 | .has_arg = no_argument, | |
151 | .flag = NULL, | |
152 | .val = 's' | |
153 | }, | |
71ef8b7c JA |
154 | { |
155 | .name = NULL, | |
156 | } | |
d39c04ca AB |
157 | }; |
158 | ||
9db17354 | 159 | struct tip_subbuf { |
9db17354 | 160 | void *buf; |
5be4bdaf JA |
161 | unsigned int len; |
162 | unsigned int max_len; | |
32f18c48 | 163 | off_t offset; |
9db17354 JA |
164 | }; |
165 | ||
21f55651 JA |
166 | #define FIFO_SIZE (1024) /* should be plenty big! */ |
167 | #define CL_SIZE (128) /* cache line, any bigger? */ | |
168 | ||
169 | struct tip_subbuf_fifo { | |
170 | int tail __attribute__((aligned(CL_SIZE))); | |
171 | int head __attribute__((aligned(CL_SIZE))); | |
172 | struct tip_subbuf *q[FIFO_SIZE]; | |
173 | }; | |
174 | ||
d0ca268b JA |
175 | struct thread_information { |
176 | int cpu; | |
177 | pthread_t thread; | |
b9d4294e JA |
178 | |
179 | int fd; | |
a3e4d330 | 180 | void *fd_buf; |
b9d4294e JA |
181 | char fn[MAXPATHLEN + 64]; |
182 | ||
11eedd9b JA |
183 | int pfd; |
184 | size_t *pfd_buf; | |
185 | ||
007c233c JA |
186 | FILE *ofile; |
187 | char *ofile_buffer; | |
32f18c48 | 188 | off_t ofile_offset; |
9db17354 | 189 | int ofile_stdout; |
8e86c98a | 190 | int ofile_mmap; |
007c233c | 191 | |
0cc7d25e JA |
192 | int (*get_subbuf)(struct thread_information *, unsigned int); |
193 | int (*flush_subbuf)(struct thread_information *, struct tip_subbuf *); | |
194 | int (*read_data)(struct thread_information *, void *, unsigned int); | |
195 | ||
d0ca268b | 196 | unsigned long events_processed; |
b7106311 | 197 | unsigned long long data_read; |
e7c9f3ff | 198 | struct device_information *device; |
9db17354 JA |
199 | |
200 | int exited; | |
201 | ||
b7106311 JA |
202 | /* |
203 | * piped fifo buffers | |
204 | */ | |
21f55651 | 205 | struct tip_subbuf_fifo fifo; |
7de86b12 | 206 | struct tip_subbuf *leftover_ts; |
b7106311 JA |
207 | |
208 | /* | |
209 | * mmap controlled output files | |
210 | */ | |
211 | unsigned long long fs_size; | |
212 | unsigned long long fs_max_size; | |
213 | unsigned long fs_off; | |
214 | void *fs_buf; | |
215 | unsigned long fs_buf_len; | |
d0ca268b JA |
216 | }; |
217 | ||
e7c9f3ff NS |
218 | struct device_information { |
219 | int fd; | |
220 | char *path; | |
221 | char buts_name[32]; | |
99c1f5ab | 222 | volatile int trace_started; |
eb3c8108 | 223 | unsigned long drop_count; |
e7c9f3ff NS |
224 | struct thread_information *threads; |
225 | }; | |
d0ca268b | 226 | |
e7c9f3ff | 227 | static int ncpus; |
d0ca268b | 228 | static struct thread_information *thread_information; |
e7c9f3ff NS |
229 | static int ndevs; |
230 | static struct device_information *device_information; | |
231 | ||
232 | /* command line option globals */ | |
233 | static char *relay_path; | |
d5396421 | 234 | static char *output_name; |
d1d7f15f | 235 | static char *output_dir; |
5c86134e | 236 | static int act_mask = ~0U; |
bc39777c | 237 | static int kill_running_trace; |
eb3c8108 JA |
238 | static unsigned long buf_size = BUF_SIZE; |
239 | static unsigned long buf_nr = BUF_NR; | |
b7106311 | 240 | static unsigned int page_size; |
d39c04ca | 241 | |
e7c9f3ff NS |
242 | #define is_done() (*(volatile int *)(&done)) |
243 | static volatile int done; | |
244 | ||
eb3c8108 JA |
245 | #define is_trace_stopped() (*(volatile int *)(&trace_stopped)) |
246 | static volatile int trace_stopped; | |
247 | ||
248 | #define is_stat_shown() (*(volatile int *)(&stat_shown)) | |
249 | static volatile int stat_shown; | |
a3e4d330 | 250 | |
8e86c98a JA |
251 | int data_is_native = -1; |
252 | ||
72ca8801 NS |
253 | static void exit_trace(int status); |
254 | ||
99c1f5ab JA |
255 | #define dip_tracing(dip) (*(volatile int *)(&(dip)->trace_started)) |
256 | #define dip_set_tracing(dip, v) ((dip)->trace_started = (v)) | |
257 | ||
258 | #define __for_each_dip(__d, __i, __e) \ | |
259 | for (__i = 0, __d = device_information; __i < __e; __i++, __d++) | |
260 | ||
261 | #define for_each_dip(__d, __i) __for_each_dip(__d, __i, ndevs) | |
9db17354 JA |
262 | #define for_each_tip(__d, __t, __j) \ |
263 | for (__j = 0, __t = (__d)->threads; __j < ncpus; __j++, __t++) | |
99c1f5ab | 264 | |
8e86c98a JA |
265 | /* |
266 | * networking stuff follows. we include a magic number so we know whether | |
267 | * to endianness convert or not | |
268 | */ | |
269 | struct blktrace_net_hdr { | |
270 | u32 magic; /* same as trace magic */ | |
22cd0c02 | 271 | char buts_name[32]; /* trace name */ |
8e86c98a | 272 | u32 cpu; /* for which cpu */ |
22cd0c02 | 273 | u32 max_cpus; |
8e86c98a JA |
274 | u32 len; /* length of following trace data */ |
275 | }; | |
276 | ||
277 | #define TRACE_NET_PORT (8462) | |
278 | ||
279 | enum { | |
280 | Net_none = 0, | |
281 | Net_server, | |
282 | Net_client, | |
283 | }; | |
284 | ||
285 | /* | |
286 | * network cmd line params | |
287 | */ | |
288 | static char hostname[MAXHOSTNAMELEN]; | |
289 | static int net_port = TRACE_NET_PORT; | |
290 | static int net_mode = 0; | |
32f18c48 | 291 | static int net_sendfile; |
8e86c98a JA |
292 | |
293 | static int net_in_fd = -1; | |
294 | static int net_out_fd = -1; | |
295 | ||
296 | static void handle_sigint(__attribute__((__unused__)) int sig) | |
297 | { | |
298 | done = 1; | |
299 | } | |
300 | ||
eb3c8108 JA |
301 | static int get_dropped_count(const char *buts_name) |
302 | { | |
303 | int fd; | |
304 | char tmp[MAXPATHLEN + 64]; | |
305 | ||
306 | snprintf(tmp, sizeof(tmp), "%s/block/%s/dropped", | |
307 | relay_path, buts_name); | |
308 | ||
309 | fd = open(tmp, O_RDONLY); | |
310 | if (fd < 0) { | |
311 | /* | |
312 | * this may be ok, if the kernel doesn't support dropped counts | |
313 | */ | |
314 | if (errno == ENOENT) | |
315 | return 0; | |
316 | ||
317 | fprintf(stderr, "Couldn't open dropped file %s\n", tmp); | |
318 | return -1; | |
319 | } | |
320 | ||
321 | if (read(fd, tmp, sizeof(tmp)) < 0) { | |
322 | perror(tmp); | |
323 | close(fd); | |
324 | return -1; | |
325 | } | |
326 | ||
327 | close(fd); | |
328 | ||
329 | return atoi(tmp); | |
330 | } | |
331 | ||
11eedd9b JA |
332 | static size_t get_subbuf_padding(struct thread_information *tip, |
333 | unsigned subbuf) | |
334 | { | |
335 | size_t padding_size = buf_nr * sizeof(size_t); | |
336 | size_t ret; | |
337 | ||
338 | if (read(tip->pfd, tip->pfd_buf, padding_size) < 0) { | |
339 | perror("tip pad read"); | |
340 | ret = -1; | |
341 | } else | |
342 | ret = tip->pfd_buf[subbuf]; | |
343 | ||
344 | return ret; | |
345 | } | |
346 | ||
e7c9f3ff | 347 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
348 | { |
349 | struct blk_user_trace_setup buts; | |
350 | ||
1f79c4a0 | 351 | memset(&buts, 0, sizeof(buts)); |
129aa440 JA |
352 | buts.buf_size = buf_size; |
353 | buts.buf_nr = buf_nr; | |
d39c04ca | 354 | buts.act_mask = act_mask; |
d0ca268b | 355 | |
ed71a31e JA |
356 | if (ioctl(dip->fd, BLKTRACESETUP, &buts) < 0) { |
357 | perror("BLKTRACESETUP"); | |
358 | return 1; | |
359 | } | |
360 | ||
361 | if (ioctl(dip->fd, BLKTRACESTART) < 0) { | |
362 | perror("BLKTRACESTART"); | |
d0ca268b JA |
363 | return 1; |
364 | } | |
365 | ||
e7c9f3ff | 366 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
99c1f5ab | 367 | dip_set_tracing(dip, 1); |
d0ca268b JA |
368 | return 0; |
369 | } | |
370 | ||
e7c9f3ff | 371 | static void stop_trace(struct device_information *dip) |
d0ca268b | 372 | { |
99c1f5ab JA |
373 | if (dip_tracing(dip) || kill_running_trace) { |
374 | dip_set_tracing(dip, 0); | |
cf9208ea | 375 | |
ed71a31e JA |
376 | if (ioctl(dip->fd, BLKTRACESTOP) < 0) |
377 | perror("BLKTRACESTOP"); | |
378 | if (ioctl(dip->fd, BLKTRACETEARDOWN) < 0) | |
379 | perror("BLKTRACETEARDOWN"); | |
cf9208ea | 380 | |
e7c9f3ff | 381 | close(dip->fd); |
cf9208ea | 382 | dip->fd = -1; |
707b0914 | 383 | } |
d0ca268b JA |
384 | } |
385 | ||
e7c9f3ff NS |
386 | static void stop_all_traces(void) |
387 | { | |
388 | struct device_information *dip; | |
389 | int i; | |
390 | ||
eb3c8108 JA |
391 | for_each_dip(dip, i) { |
392 | dip->drop_count = get_dropped_count(dip->buts_name); | |
e7c9f3ff | 393 | stop_trace(dip); |
eb3c8108 | 394 | } |
e7c9f3ff NS |
395 | } |
396 | ||
eb3c8108 JA |
397 | static void wait_for_data(struct thread_information *tip) |
398 | { | |
399 | struct pollfd pfd = { .fd = tip->fd, .events = POLLIN }; | |
400 | ||
9db17354 | 401 | do { |
b4aabcb3 | 402 | poll(&pfd, 1, 100); |
9db17354 JA |
403 | if (pfd.revents & POLLIN) |
404 | break; | |
405 | if (tip->ofile_stdout) | |
406 | break; | |
407 | } while (!is_done()); | |
eb3c8108 JA |
408 | } |
409 | ||
0cc7d25e JA |
410 | static int read_data_file(struct thread_information *tip, void *buf, |
411 | unsigned int len) | |
d0ca268b | 412 | { |
ae9f71b3 | 413 | int ret = 0; |
bbabf03a | 414 | |
9db17354 JA |
415 | do { |
416 | wait_for_data(tip); | |
ae9f71b3 | 417 | |
9db17354 JA |
418 | ret = read(tip->fd, buf, len); |
419 | if (!ret) | |
420 | continue; | |
421 | else if (ret > 0) | |
422 | return ret; | |
423 | else { | |
bbabf03a | 424 | if (errno != EAGAIN) { |
a3e4d330 JA |
425 | perror(tip->fn); |
426 | fprintf(stderr,"Thread %d failed read of %s\n", | |
427 | tip->cpu, tip->fn); | |
428 | break; | |
429 | } | |
9db17354 | 430 | continue; |
bbabf03a | 431 | } |
9db17354 | 432 | } while (!is_done()); |
8a43bac5 | 433 | |
bbabf03a | 434 | return ret; |
8e86c98a | 435 | |
8a43bac5 JA |
436 | } |
437 | ||
0cc7d25e JA |
438 | static int read_data_net(struct thread_information *tip, void *buf, |
439 | unsigned int len) | |
8e86c98a JA |
440 | { |
441 | unsigned int bytes_left = len; | |
442 | int ret = 0; | |
443 | ||
444 | do { | |
445 | ret = recv(net_in_fd, buf, bytes_left, MSG_WAITALL); | |
446 | ||
447 | if (!ret) | |
448 | continue; | |
449 | else if (ret < 0) { | |
450 | if (errno != EAGAIN) { | |
451 | perror(tip->fn); | |
452 | fprintf(stderr, "server: failed read\n"); | |
453 | return 0; | |
454 | } | |
455 | continue; | |
456 | } else { | |
457 | buf += ret; | |
458 | bytes_left -= ret; | |
459 | } | |
460 | } while (!is_done() && bytes_left); | |
461 | ||
410d7c62 | 462 | return len - bytes_left; |
8e86c98a JA |
463 | } |
464 | ||
0cc7d25e JA |
465 | static int read_data(struct thread_information *tip, void *buf, |
466 | unsigned int len) | |
8e86c98a | 467 | { |
0cc7d25e | 468 | int ret = tip->read_data(tip, buf, len); |
8e86c98a | 469 | |
410d7c62 JA |
470 | if (ret > 0) |
471 | tip->data_read += ret; | |
472 | ||
473 | return ret; | |
8e86c98a JA |
474 | } |
475 | ||
476 | static inline struct tip_subbuf * | |
477 | subbuf_fifo_dequeue(struct thread_information *tip) | |
a3e4d330 | 478 | { |
21f55651 JA |
479 | const int head = tip->fifo.head; |
480 | const int next = (head + 1) & (FIFO_SIZE - 1); | |
481 | ||
482 | if (head != tip->fifo.tail) { | |
483 | struct tip_subbuf *ts = tip->fifo.q[head]; | |
484 | ||
485 | store_barrier(); | |
486 | tip->fifo.head = next; | |
487 | return ts; | |
488 | } | |
489 | ||
490 | return NULL; | |
9db17354 | 491 | } |
eb3c8108 | 492 | |
21f55651 JA |
493 | static inline int subbuf_fifo_queue(struct thread_information *tip, |
494 | struct tip_subbuf *ts) | |
9db17354 | 495 | { |
21f55651 JA |
496 | const int tail = tip->fifo.tail; |
497 | const int next = (tail + 1) & (FIFO_SIZE - 1); | |
498 | ||
499 | if (next != tip->fifo.head) { | |
500 | tip->fifo.q[tail] = ts; | |
501 | store_barrier(); | |
502 | tip->fifo.tail = next; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | fprintf(stderr, "fifo too small!\n"); | |
507 | return 1; | |
a3e4d330 JA |
508 | } |
509 | ||
b7106311 JA |
510 | /* |
511 | * For file output, truncate and mmap the file appropriately | |
512 | */ | |
8e86c98a | 513 | static int mmap_subbuf(struct thread_information *tip, unsigned int maxlen) |
b7106311 JA |
514 | { |
515 | int ofd = fileno(tip->ofile); | |
516 | int ret; | |
517 | ||
518 | /* | |
519 | * extend file, if we have to. use chunks of 16 subbuffers. | |
520 | */ | |
521 | if (tip->fs_off + buf_size > tip->fs_buf_len) { | |
522 | if (tip->fs_buf) { | |
5975d309 | 523 | munlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
524 | munmap(tip->fs_buf, tip->fs_buf_len); |
525 | tip->fs_buf = NULL; | |
526 | } | |
527 | ||
528 | tip->fs_off = tip->fs_size & (page_size - 1); | |
529 | tip->fs_buf_len = (16 * buf_size) - tip->fs_off; | |
530 | tip->fs_max_size += tip->fs_buf_len; | |
531 | ||
532 | if (ftruncate(ofd, tip->fs_max_size) < 0) { | |
533 | perror("ftruncate"); | |
534 | return -1; | |
535 | } | |
536 | ||
537 | tip->fs_buf = mmap(NULL, tip->fs_buf_len, PROT_WRITE, | |
538 | MAP_SHARED, ofd, tip->fs_size - tip->fs_off); | |
539 | if (tip->fs_buf == MAP_FAILED) { | |
540 | perror("mmap"); | |
541 | return -1; | |
542 | } | |
5975d309 | 543 | mlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
544 | } |
545 | ||
8e86c98a | 546 | ret = read_data(tip, tip->fs_buf + tip->fs_off, maxlen); |
b7106311 | 547 | if (ret >= 0) { |
b7106311 JA |
548 | tip->fs_size += ret; |
549 | tip->fs_off += ret; | |
550 | return 0; | |
551 | } | |
552 | ||
553 | return -1; | |
554 | } | |
555 | ||
32f18c48 JA |
556 | static int get_subbuf_sendfile(struct thread_information *tip, |
557 | unsigned int maxlen) | |
558 | { | |
11eedd9b | 559 | struct tip_subbuf *ts; |
32f18c48 | 560 | struct stat sb; |
1be42f3d | 561 | unsigned int ready, this_size; |
11eedd9b | 562 | int err; |
32f18c48 JA |
563 | |
564 | if (fstat(tip->fd, &sb) < 0) { | |
565 | perror("trace stat"); | |
566 | return 1; | |
567 | } | |
568 | ||
11eedd9b JA |
569 | ready = sb.st_size - tip->ofile_offset; |
570 | if (!ready) | |
571 | return 0; | |
572 | ||
1be42f3d | 573 | this_size = buf_size; |
11eedd9b | 574 | while (ready) { |
1be42f3d JA |
575 | if (this_size > ready) |
576 | this_size = ready; | |
577 | ||
11eedd9b JA |
578 | ts = malloc(sizeof(*ts)); |
579 | ||
580 | ts->max_len = maxlen; | |
581 | ts->buf = NULL; | |
582 | ||
1be42f3d | 583 | ts->len = this_size; |
11eedd9b JA |
584 | ts->max_len = ts->len; |
585 | ts->offset = tip->ofile_offset; | |
586 | tip->ofile_offset += ts->len; | |
587 | ||
588 | err = subbuf_fifo_queue(tip, ts); | |
589 | if (err) | |
590 | return err; | |
591 | ||
1be42f3d | 592 | ready -= this_size; |
11eedd9b JA |
593 | } |
594 | ||
595 | return 0; | |
32f18c48 JA |
596 | } |
597 | ||
b7106311 | 598 | /* |
22cd0c02 | 599 | * Use the copy approach for pipes and network |
b7106311 | 600 | */ |
0cc7d25e | 601 | static int get_subbuf(struct thread_information *tip, unsigned int maxlen) |
a3e4d330 | 602 | { |
8e86c98a | 603 | struct tip_subbuf *ts = malloc(sizeof(*ts)); |
22cd0c02 | 604 | int ret; |
8e86c98a | 605 | |
22cd0c02 | 606 | ts->buf = malloc(buf_size); |
0cc7d25e | 607 | ts->max_len = maxlen; |
8e86c98a | 608 | |
22cd0c02 JA |
609 | ret = read_data(tip, ts->buf, ts->max_len); |
610 | if (ret > 0) { | |
611 | ts->len = ret; | |
612 | return subbuf_fifo_queue(tip, ts); | |
9db17354 | 613 | } |
a3e4d330 | 614 | |
b7106311 | 615 | return ret; |
a3e4d330 JA |
616 | } |
617 | ||
9db17354 | 618 | static void close_thread(struct thread_information *tip) |
a3e4d330 | 619 | { |
9db17354 JA |
620 | if (tip->fd != -1) |
621 | close(tip->fd); | |
11eedd9b JA |
622 | if (tip->pfd != -1) |
623 | close(tip->pfd); | |
9db17354 JA |
624 | if (tip->ofile) |
625 | fclose(tip->ofile); | |
626 | if (tip->ofile_buffer) | |
627 | free(tip->ofile_buffer); | |
628 | if (tip->fd_buf) | |
629 | free(tip->fd_buf); | |
11eedd9b JA |
630 | if (tip->pfd_buf) |
631 | free(tip->pfd_buf); | |
1c99bc21 | 632 | |
9db17354 | 633 | tip->fd = -1; |
11eedd9b | 634 | tip->pfd = -1; |
9db17354 JA |
635 | tip->ofile = NULL; |
636 | tip->ofile_buffer = NULL; | |
637 | tip->fd_buf = NULL; | |
a3e4d330 JA |
638 | } |
639 | ||
8e86c98a JA |
640 | static void tip_ftrunc_final(struct thread_information *tip) |
641 | { | |
642 | /* | |
643 | * truncate to right size and cleanup mmap | |
644 | */ | |
645 | if (tip->ofile_mmap) { | |
646 | int ofd = fileno(tip->ofile); | |
647 | ||
648 | if (tip->fs_buf) | |
649 | munmap(tip->fs_buf, tip->fs_buf_len); | |
650 | ||
651 | ftruncate(ofd, tip->fs_size); | |
652 | } | |
653 | } | |
654 | ||
9db17354 | 655 | static void *thread_main(void *arg) |
a3e4d330 | 656 | { |
9db17354 JA |
657 | struct thread_information *tip = arg; |
658 | pid_t pid = getpid(); | |
659 | cpu_set_t cpu_mask; | |
a3e4d330 | 660 | |
9db17354 JA |
661 | CPU_ZERO(&cpu_mask); |
662 | CPU_SET((tip->cpu), &cpu_mask); | |
a3e4d330 | 663 | |
9db17354 JA |
664 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { |
665 | perror("sched_setaffinity"); | |
666 | exit_trace(1); | |
667 | } | |
a3e4d330 | 668 | |
9db17354 JA |
669 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
670 | relay_path, tip->device->buts_name, tip->cpu); | |
671 | tip->fd = open(tip->fn, O_RDONLY); | |
672 | if (tip->fd < 0) { | |
673 | perror(tip->fn); | |
674 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, | |
675 | tip->fn); | |
676 | exit_trace(1); | |
a3e4d330 JA |
677 | } |
678 | ||
11eedd9b JA |
679 | if (net_mode == Net_client && net_sendfile) { |
680 | char tmp[MAXPATHLEN + 64]; | |
681 | ||
682 | snprintf(tmp, sizeof(tmp), "%s/block/%s/trace%d.padding", | |
683 | relay_path, tip->device->buts_name, tip->cpu); | |
684 | ||
685 | tip->pfd = open(tmp, O_RDONLY); | |
686 | if (tip->pfd < 0) { | |
687 | fprintf(stderr, "Couldn't open padding file %s\n", tmp); | |
688 | exit_trace(1); | |
689 | } | |
690 | ||
691 | tip->pfd_buf = malloc(buf_nr * sizeof(size_t)); | |
692 | } | |
693 | ||
b7106311 | 694 | while (!is_done()) { |
0cc7d25e JA |
695 | if (tip->get_subbuf(tip, buf_size)) |
696 | break; | |
b7106311 JA |
697 | } |
698 | ||
8e86c98a JA |
699 | tip_ftrunc_final(tip); |
700 | tip->exited = 1; | |
701 | return NULL; | |
702 | } | |
b7106311 | 703 | |
8e86c98a JA |
704 | static int write_data_net(int fd, void *buf, unsigned int buf_len) |
705 | { | |
706 | unsigned int bytes_left = buf_len; | |
707 | int ret; | |
b7106311 | 708 | |
8e86c98a JA |
709 | while (bytes_left) { |
710 | ret = send(fd, buf, bytes_left, 0); | |
711 | if (ret < 0) { | |
712 | perror("send"); | |
713 | return 1; | |
714 | } | |
715 | ||
716 | buf += ret; | |
717 | bytes_left -= ret; | |
9db17354 | 718 | } |
a3e4d330 | 719 | |
8e86c98a | 720 | return 0; |
a3e4d330 JA |
721 | } |
722 | ||
32f18c48 | 723 | static int net_send_header(struct thread_information *tip, unsigned int len) |
8e86c98a JA |
724 | { |
725 | struct blktrace_net_hdr hdr; | |
8e86c98a JA |
726 | |
727 | hdr.magic = BLK_IO_TRACE_MAGIC; | |
22cd0c02 | 728 | strcpy(hdr.buts_name, tip->device->buts_name); |
8e86c98a | 729 | hdr.cpu = tip->cpu; |
22cd0c02 | 730 | hdr.max_cpus = ncpus; |
32f18c48 | 731 | hdr.len = len; |
8e86c98a | 732 | |
32f18c48 JA |
733 | return write_data_net(net_out_fd, &hdr, sizeof(hdr)); |
734 | } | |
8e86c98a | 735 | |
6a752c90 JA |
736 | /* |
737 | * send header with 0 length to signal end-of-run | |
738 | */ | |
739 | static void net_client_send_close(void) | |
740 | { | |
741 | struct blktrace_net_hdr hdr; | |
742 | ||
743 | hdr.magic = BLK_IO_TRACE_MAGIC; | |
744 | hdr.cpu = 0; | |
745 | hdr.max_cpus = ncpus; | |
746 | hdr.len = 0; | |
747 | ||
748 | write_data_net(net_out_fd, &hdr, sizeof(hdr)); | |
749 | } | |
750 | ||
32f18c48 JA |
751 | static int flush_subbuf_net(struct thread_information *tip, |
752 | struct tip_subbuf *ts) | |
753 | { | |
754 | if (net_send_header(tip, ts->len)) | |
755 | return 1; | |
22cd0c02 JA |
756 | if (write_data_net(net_out_fd, ts->buf, ts->len)) |
757 | return 1; | |
8e86c98a | 758 | |
f0597a7e | 759 | free(ts->buf); |
8e86c98a JA |
760 | free(ts); |
761 | return 0; | |
762 | } | |
763 | ||
32f18c48 JA |
764 | static int flush_subbuf_sendfile(struct thread_information *tip, |
765 | struct tip_subbuf *ts) | |
766 | { | |
11eedd9b JA |
767 | size_t padding; |
768 | unsigned subbuf; | |
769 | unsigned len; | |
770 | ||
771 | subbuf = (ts->offset / buf_size) % buf_nr; | |
772 | padding = get_subbuf_padding(tip, subbuf); | |
773 | len = ts->len - padding; | |
774 | ||
775 | if (net_send_header(tip, len)) | |
32f18c48 | 776 | return 1; |
11eedd9b | 777 | if (sendfile(net_out_fd, tip->fd, &ts->offset, len) < 0) { |
32f18c48 JA |
778 | perror("sendfile"); |
779 | return 1; | |
780 | } | |
781 | ||
782 | free(ts); | |
783 | return 0; | |
784 | } | |
785 | ||
8e86c98a JA |
786 | static int write_data(struct thread_information *tip, void *buf, |
787 | unsigned int buf_len) | |
8a43bac5 | 788 | { |
7126171a | 789 | int ret; |
8a43bac5 | 790 | |
6480258a JA |
791 | if (!buf_len) |
792 | return 0; | |
793 | ||
7126171a JA |
794 | while (1) { |
795 | ret = fwrite(buf, buf_len, 1, tip->ofile); | |
007c233c | 796 | if (ret == 1) |
8a43bac5 JA |
797 | break; |
798 | ||
db6fe5bc JA |
799 | if (ret < 0) { |
800 | perror("write"); | |
801 | return 1; | |
8a43bac5 | 802 | } |
d0ca268b JA |
803 | } |
804 | ||
9db17354 | 805 | if (tip->ofile_stdout) |
7126171a JA |
806 | fflush(tip->ofile); |
807 | ||
8a43bac5 JA |
808 | return 0; |
809 | } | |
810 | ||
8e86c98a JA |
811 | static int flush_subbuf_file(struct thread_information *tip, |
812 | struct tip_subbuf *ts) | |
8a43bac5 | 813 | { |
9db17354 JA |
814 | unsigned int offset = 0; |
815 | struct blk_io_trace *t; | |
816 | int pdu_len, events = 0; | |
8a43bac5 | 817 | |
9db17354 | 818 | /* |
7de86b12 | 819 | * surplus from last run |
9db17354 | 820 | */ |
7de86b12 AB |
821 | if (tip->leftover_ts) { |
822 | struct tip_subbuf *prev_ts = tip->leftover_ts; | |
823 | ||
9e8b753c | 824 | if (prev_ts->len + ts->len > prev_ts->max_len) { |
7de86b12 AB |
825 | prev_ts->max_len += ts->len; |
826 | prev_ts->buf = realloc(prev_ts->buf, prev_ts->max_len); | |
827 | } | |
828 | ||
9e8b753c | 829 | memcpy(prev_ts->buf + prev_ts->len, ts->buf, ts->len); |
7de86b12 AB |
830 | prev_ts->len += ts->len; |
831 | ||
832 | free(ts->buf); | |
833 | free(ts); | |
834 | ||
835 | ts = prev_ts; | |
836 | tip->leftover_ts = NULL; | |
9db17354 | 837 | } |
d0ca268b | 838 | |
9db17354 JA |
839 | while (offset + sizeof(*t) <= ts->len) { |
840 | t = ts->buf + offset; | |
3a9d6c13 | 841 | |
9cfa6c2b AB |
842 | if (verify_trace(t)) { |
843 | write_data(tip, ts->buf, offset); | |
9db17354 | 844 | return -1; |
9cfa6c2b | 845 | } |
3a9d6c13 | 846 | |
9db17354 | 847 | pdu_len = t->pdu_len; |
3a9d6c13 | 848 | |
9db17354 | 849 | if (offset + sizeof(*t) + pdu_len > ts->len) |
3a9d6c13 | 850 | break; |
4b5db44a | 851 | |
9db17354 JA |
852 | offset += sizeof(*t) + pdu_len; |
853 | tip->events_processed++; | |
b7106311 | 854 | tip->data_read += sizeof(*t) + pdu_len; |
9db17354 | 855 | events++; |
3a9d6c13 JA |
856 | } |
857 | ||
9cfa6c2b AB |
858 | if (write_data(tip, ts->buf, offset)) |
859 | return -1; | |
860 | ||
3a9d6c13 | 861 | /* |
9db17354 | 862 | * leftover bytes, save them for next time |
3a9d6c13 | 863 | */ |
9db17354 | 864 | if (offset != ts->len) { |
7de86b12 | 865 | tip->leftover_ts = ts; |
9e8b753c JA |
866 | ts->len -= offset; |
867 | memmove(ts->buf, ts->buf + offset, ts->len); | |
7de86b12 AB |
868 | } else { |
869 | free(ts->buf); | |
870 | free(ts); | |
9db17354 | 871 | } |
4b5db44a | 872 | |
9db17354 | 873 | return events; |
4b5db44a JA |
874 | } |
875 | ||
9db17354 | 876 | static int write_tip_events(struct thread_information *tip) |
d5396421 | 877 | { |
21f55651 | 878 | struct tip_subbuf *ts = subbuf_fifo_dequeue(tip); |
d5396421 | 879 | |
0cc7d25e JA |
880 | if (ts) |
881 | return tip->flush_subbuf(tip, ts); | |
91816d54 | 882 | |
9db17354 | 883 | return 0; |
91816d54 JA |
884 | } |
885 | ||
9db17354 JA |
886 | /* |
887 | * scans the tips we know and writes out the subbuffers we accumulate | |
888 | */ | |
889 | static void get_and_write_events(void) | |
d0ca268b | 890 | { |
9db17354 JA |
891 | struct device_information *dip; |
892 | struct thread_information *tip; | |
27223f19 | 893 | int i, j, events, ret, tips_running; |
d0ca268b | 894 | |
9db17354 JA |
895 | while (!is_done()) { |
896 | events = 0; | |
d0ca268b | 897 | |
9db17354 JA |
898 | for_each_dip(dip, i) { |
899 | for_each_tip(dip, tip, j) { | |
900 | ret = write_tip_events(tip); | |
901 | if (ret > 0) | |
902 | events += ret; | |
903 | } | |
904 | } | |
d0ca268b | 905 | |
9db17354 JA |
906 | if (!events) |
907 | usleep(10); | |
d0ca268b JA |
908 | } |
909 | ||
a3e4d330 | 910 | /* |
9db17354 | 911 | * reap stored events |
a3e4d330 | 912 | */ |
9db17354 JA |
913 | do { |
914 | events = 0; | |
27223f19 | 915 | tips_running = 0; |
9db17354 JA |
916 | for_each_dip(dip, i) { |
917 | for_each_tip(dip, tip, j) { | |
918 | ret = write_tip_events(tip); | |
919 | if (ret > 0) | |
920 | events += ret; | |
27223f19 | 921 | tips_running += !tip->exited; |
9db17354 | 922 | } |
69e65a9e | 923 | } |
9db17354 | 924 | usleep(10); |
27223f19 | 925 | } while (events || tips_running); |
d0ca268b JA |
926 | } |
927 | ||
b7106311 JA |
928 | static void wait_for_threads(void) |
929 | { | |
930 | /* | |
8e86c98a JA |
931 | * for piped or network output, poll and fetch data for writeout. |
932 | * for files, we just wait around for trace threads to exit | |
b7106311 | 933 | */ |
8e86c98a JA |
934 | if ((output_name && !strcmp(output_name, "-")) || |
935 | net_mode == Net_client) | |
b7106311 JA |
936 | get_and_write_events(); |
937 | else { | |
938 | struct device_information *dip; | |
939 | struct thread_information *tip; | |
940 | int i, j, tips_running; | |
941 | ||
942 | do { | |
943 | tips_running = 0; | |
944 | usleep(1000); | |
945 | ||
946 | for_each_dip(dip, i) | |
947 | for_each_tip(dip, tip, j) | |
948 | tips_running += !tip->exited; | |
949 | } while (tips_running); | |
950 | } | |
6a752c90 JA |
951 | |
952 | if (net_mode == Net_client) | |
953 | net_client_send_close(); | |
b7106311 JA |
954 | } |
955 | ||
8e86c98a JA |
956 | static void fill_ofname(char *dst, char *buts_name, int cpu) |
957 | { | |
958 | int len = 0; | |
959 | ||
960 | if (output_dir) | |
961 | len = sprintf(dst, "%s/", output_dir); | |
962 | ||
963 | if (output_name) | |
964 | sprintf(dst + len, "%s.blktrace.%d", output_name, cpu); | |
965 | else | |
966 | sprintf(dst + len, "%s.blktrace.%d", buts_name, cpu); | |
967 | } | |
968 | ||
0cc7d25e JA |
969 | static void fill_ops(struct thread_information *tip) |
970 | { | |
971 | /* | |
972 | * setup ops | |
973 | */ | |
32f18c48 JA |
974 | if (net_mode == Net_client) { |
975 | if (net_sendfile) { | |
976 | tip->get_subbuf = get_subbuf_sendfile; | |
977 | tip->flush_subbuf = flush_subbuf_sendfile; | |
978 | } else { | |
979 | tip->get_subbuf = get_subbuf; | |
980 | tip->flush_subbuf = flush_subbuf_net; | |
981 | } | |
982 | } else { | |
983 | if (tip->ofile_mmap) | |
984 | tip->get_subbuf = mmap_subbuf; | |
985 | else | |
986 | tip->get_subbuf = get_subbuf; | |
0cc7d25e | 987 | |
0cc7d25e | 988 | tip->flush_subbuf = flush_subbuf_file; |
32f18c48 JA |
989 | } |
990 | ||
0cc7d25e JA |
991 | if (net_mode == Net_server) |
992 | tip->read_data = read_data_net; | |
993 | else | |
994 | tip->read_data = read_data_file; | |
995 | } | |
996 | ||
ddf22842 JA |
997 | static int tip_open_output(struct device_information *dip, |
998 | struct thread_information *tip) | |
d0ca268b | 999 | { |
ddf22842 | 1000 | int pipeline = output_name && !strcmp(output_name, "-"); |
8e86c98a | 1001 | int mode, vbuf_size; |
22cd0c02 | 1002 | char op[64]; |
d0ca268b | 1003 | |
ddf22842 JA |
1004 | if (net_mode == Net_client) { |
1005 | tip->ofile = NULL; | |
1006 | tip->ofile_stdout = 0; | |
1007 | tip->ofile_mmap = 0; | |
1008 | vbuf_size = 0; | |
1be42f3d | 1009 | mode = 0; /* gcc 4.x issues a bogus warning */ |
ddf22842 JA |
1010 | } else if (pipeline) { |
1011 | tip->ofile = fdopen(STDOUT_FILENO, "w"); | |
1012 | tip->ofile_stdout = 1; | |
1013 | tip->ofile_mmap = 0; | |
1014 | mode = _IOLBF; | |
1015 | vbuf_size = 512; | |
1016 | } else { | |
1017 | fill_ofname(op, dip->buts_name, tip->cpu); | |
1018 | tip->ofile = fopen(op, "w+"); | |
1019 | tip->ofile_stdout = 0; | |
1020 | tip->ofile_mmap = 1; | |
1021 | mode = _IOFBF; | |
1022 | vbuf_size = OFILE_BUF; | |
1023 | } | |
d5396421 | 1024 | |
ddf22842 JA |
1025 | if (net_mode != Net_client && tip->ofile == NULL) { |
1026 | perror(op); | |
1027 | return 1; | |
1028 | } | |
d5396421 | 1029 | |
ddf22842 | 1030 | if (vbuf_size) { |
57e8a2ad TZ |
1031 | tip->ofile_buffer = malloc(vbuf_size); |
1032 | if (setvbuf(tip->ofile, tip->ofile_buffer, mode, vbuf_size)) { | |
007c233c JA |
1033 | perror("setvbuf"); |
1034 | close_thread(tip); | |
1035 | return 1; | |
1036 | } | |
ddf22842 JA |
1037 | } |
1038 | ||
1039 | fill_ops(tip); | |
1040 | return 0; | |
1041 | } | |
007c233c | 1042 | |
ddf22842 JA |
1043 | static int start_threads(struct device_information *dip) |
1044 | { | |
1045 | struct thread_information *tip; | |
1046 | int j; | |
1047 | ||
1048 | for_each_tip(dip, tip, j) { | |
1049 | tip->cpu = j; | |
1050 | tip->device = dip; | |
1051 | tip->events_processed = 0; | |
11eedd9b JA |
1052 | tip->fd = -1; |
1053 | tip->pfd = -1; | |
ddf22842 JA |
1054 | memset(&tip->fifo, 0, sizeof(tip->fifo)); |
1055 | tip->leftover_ts = NULL; | |
1056 | ||
1057 | if (tip_open_output(dip, tip)) | |
1058 | return 1; | |
0cc7d25e | 1059 | |
9db17354 | 1060 | if (pthread_create(&tip->thread, NULL, thread_main, tip)) { |
e7c9f3ff | 1061 | perror("pthread_create"); |
007c233c | 1062 | close_thread(tip); |
e7c9f3ff | 1063 | return 1; |
d0ca268b JA |
1064 | } |
1065 | } | |
1066 | ||
e7c9f3ff | 1067 | return 0; |
d0ca268b JA |
1068 | } |
1069 | ||
e7c9f3ff | 1070 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 1071 | { |
e7c9f3ff | 1072 | struct thread_information *tip; |
91816d54 | 1073 | unsigned long ret; |
007c233c JA |
1074 | int i; |
1075 | ||
9db17354 | 1076 | for_each_tip(dip, tip, i) { |
91816d54 | 1077 | (void) pthread_join(tip->thread, (void *) &ret); |
9db17354 JA |
1078 | close_thread(tip); |
1079 | } | |
3aabcd89 JA |
1080 | } |
1081 | ||
e7c9f3ff | 1082 | static void stop_all_threads(void) |
72ca8801 | 1083 | { |
e7c9f3ff | 1084 | struct device_information *dip; |
72ca8801 NS |
1085 | int i; |
1086 | ||
99c1f5ab | 1087 | for_each_dip(dip, i) |
e7c9f3ff NS |
1088 | stop_threads(dip); |
1089 | } | |
1090 | ||
1091 | static void stop_all_tracing(void) | |
1092 | { | |
1093 | struct device_information *dip; | |
91816d54 | 1094 | int i; |
007c233c | 1095 | |
91816d54 | 1096 | for_each_dip(dip, i) |
e7c9f3ff | 1097 | stop_trace(dip); |
72ca8801 NS |
1098 | } |
1099 | ||
1100 | static void exit_trace(int status) | |
1101 | { | |
eb3c8108 JA |
1102 | if (!is_trace_stopped()) { |
1103 | trace_stopped = 1; | |
1104 | stop_all_threads(); | |
1105 | stop_all_tracing(); | |
1106 | } | |
1107 | ||
72ca8801 NS |
1108 | exit(status); |
1109 | } | |
1110 | ||
e7c9f3ff NS |
1111 | static int resize_devices(char *path) |
1112 | { | |
1113 | int size = (ndevs + 1) * sizeof(struct device_information); | |
1114 | ||
1115 | device_information = realloc(device_information, size); | |
1116 | if (!device_information) { | |
1117 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
1118 | return 1; | |
1119 | } | |
1120 | device_information[ndevs].path = path; | |
1121 | ndevs++; | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | static int open_devices(void) | |
d0ca268b | 1126 | { |
e7c9f3ff | 1127 | struct device_information *dip; |
d0ca268b | 1128 | int i; |
d0ca268b | 1129 | |
99c1f5ab | 1130 | for_each_dip(dip, i) { |
cf9208ea | 1131 | dip->fd = open(dip->path, O_RDONLY | O_NONBLOCK); |
e7c9f3ff NS |
1132 | if (dip->fd < 0) { |
1133 | perror(dip->path); | |
1134 | return 1; | |
1135 | } | |
1136 | } | |
99c1f5ab | 1137 | |
e7c9f3ff NS |
1138 | return 0; |
1139 | } | |
1140 | ||
1141 | static int start_devices(void) | |
1142 | { | |
1143 | struct device_information *dip; | |
1144 | int i, j, size; | |
1145 | ||
1146 | size = ncpus * sizeof(struct thread_information); | |
1147 | thread_information = malloc(size * ndevs); | |
1148 | if (!thread_information) { | |
1149 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
1150 | return 1; | |
1151 | } | |
d5396421 | 1152 | |
99c1f5ab | 1153 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1154 | if (start_trace(dip)) { |
1155 | close(dip->fd); | |
1156 | fprintf(stderr, "Failed to start trace on %s\n", | |
1157 | dip->path); | |
1158 | break; | |
1159 | } | |
1160 | } | |
99c1f5ab | 1161 | |
e7c9f3ff | 1162 | if (i != ndevs) { |
99c1f5ab | 1163 | __for_each_dip(dip, j, i) |
e7c9f3ff | 1164 | stop_trace(dip); |
99c1f5ab | 1165 | |
e7c9f3ff NS |
1166 | return 1; |
1167 | } | |
1168 | ||
99c1f5ab | 1169 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1170 | dip->threads = thread_information + (i * ncpus); |
1171 | if (start_threads(dip)) { | |
1172 | fprintf(stderr, "Failed to start worker threads\n"); | |
1173 | break; | |
1174 | } | |
1175 | } | |
99c1f5ab | 1176 | |
e7c9f3ff | 1177 | if (i != ndevs) { |
99c1f5ab | 1178 | __for_each_dip(dip, j, i) |
e7c9f3ff | 1179 | stop_threads(dip); |
99c1f5ab | 1180 | for_each_dip(dip, i) |
e7c9f3ff | 1181 | stop_trace(dip); |
99c1f5ab | 1182 | |
e7c9f3ff | 1183 | return 1; |
d0ca268b JA |
1184 | } |
1185 | ||
e7c9f3ff | 1186 | return 0; |
d0ca268b JA |
1187 | } |
1188 | ||
e7c9f3ff NS |
1189 | static void show_stats(void) |
1190 | { | |
e7c9f3ff NS |
1191 | struct device_information *dip; |
1192 | struct thread_information *tip; | |
b7106311 | 1193 | unsigned long long events_processed, data_read; |
eb3c8108 | 1194 | unsigned long total_drops; |
2f903295 | 1195 | int i, j, no_stdout = 0; |
eb3c8108 JA |
1196 | |
1197 | if (is_stat_shown()) | |
1198 | return; | |
1199 | ||
2f903295 JA |
1200 | if (output_name && !strcmp(output_name, "-")) |
1201 | no_stdout = 1; | |
1202 | ||
eb3c8108 | 1203 | stat_shown = 1; |
428683db | 1204 | |
56070ea4 | 1205 | total_drops = 0; |
99c1f5ab | 1206 | for_each_dip(dip, i) { |
2f903295 | 1207 | if (!no_stdout) |
56070ea4 | 1208 | printf("Device: %s\n", dip->path); |
e7c9f3ff | 1209 | events_processed = 0; |
b7106311 | 1210 | data_read = 0; |
99c1f5ab | 1211 | for_each_tip(dip, tip, j) { |
2f903295 | 1212 | if (!no_stdout) |
b7106311 JA |
1213 | printf(" CPU%3d: %20lu events, %8llu KiB data\n", |
1214 | tip->cpu, tip->events_processed, | |
54824c20 | 1215 | (tip->data_read + 1023) >> 10); |
e7c9f3ff | 1216 | events_processed += tip->events_processed; |
b7106311 | 1217 | data_read += tip->data_read; |
e7c9f3ff | 1218 | } |
eb3c8108 | 1219 | total_drops += dip->drop_count; |
2f903295 | 1220 | if (!no_stdout) |
b7106311 JA |
1221 | printf(" Total: %20llu events (dropped %lu), %8llu KiB data\n", |
1222 | events_processed, dip->drop_count, | |
18d8437d | 1223 | (data_read + 1023) >> 10); |
e7c9f3ff | 1224 | } |
56070ea4 JA |
1225 | |
1226 | if (total_drops) | |
1227 | fprintf(stderr, "You have dropped events, consider using a larger buffer size (-b)\n"); | |
e7c9f3ff | 1228 | } |
52724a0e | 1229 | |
22cd0c02 | 1230 | static struct device_information *net_get_dip(char *buts_name) |
8e86c98a | 1231 | { |
22cd0c02 | 1232 | struct device_information *dip; |
8e86c98a JA |
1233 | int i; |
1234 | ||
22cd0c02 JA |
1235 | for (i = 0; i < ndevs; i++) { |
1236 | dip = &device_information[i]; | |
8e86c98a | 1237 | |
22cd0c02 JA |
1238 | if (!strcmp(dip->buts_name, buts_name)) |
1239 | return dip; | |
8e86c98a JA |
1240 | } |
1241 | ||
22cd0c02 JA |
1242 | device_information = realloc(device_information, (ndevs + 1) * sizeof(*dip)); |
1243 | dip = &device_information[ndevs]; | |
1244 | strcpy(dip->buts_name, buts_name); | |
410d7c62 | 1245 | strcpy(dip->path, buts_name); |
22cd0c02 JA |
1246 | ndevs++; |
1247 | dip->threads = malloc(ncpus * sizeof(struct thread_information)); | |
1248 | memset(dip->threads, 0, ncpus * sizeof(struct thread_information)); | |
1249 | ||
1250 | /* | |
1251 | * open all files | |
1252 | */ | |
1253 | for (i = 0; i < ncpus; i++) { | |
1254 | struct thread_information *tip = &dip->threads[i]; | |
8e86c98a | 1255 | |
22cd0c02 | 1256 | tip->cpu = i; |
22cd0c02 | 1257 | tip->device = dip; |
8e86c98a | 1258 | |
ddf22842 | 1259 | if (tip_open_output(dip, tip)) |
22cd0c02 | 1260 | return NULL; |
8e86c98a JA |
1261 | } |
1262 | ||
22cd0c02 JA |
1263 | return dip; |
1264 | } | |
1265 | ||
1266 | static struct thread_information *net_get_tip(struct blktrace_net_hdr *bnh) | |
1267 | { | |
1268 | struct device_information *dip; | |
1269 | ||
1270 | ncpus = bnh->max_cpus; | |
1271 | dip = net_get_dip(bnh->buts_name); | |
1272 | return &dip->threads[bnh->cpu]; | |
8e86c98a JA |
1273 | } |
1274 | ||
1275 | static int net_get_header(struct blktrace_net_hdr *bnh) | |
1276 | { | |
1277 | int fl = fcntl(net_in_fd, F_GETFL); | |
1278 | int bytes_left, ret; | |
1279 | void *p = bnh; | |
1280 | ||
1281 | fcntl(net_in_fd, F_SETFL, fl | O_NONBLOCK); | |
1282 | bytes_left = sizeof(*bnh); | |
1283 | while (bytes_left && !is_done()) { | |
1284 | ret = recv(net_in_fd, p, bytes_left, MSG_WAITALL); | |
1285 | if (ret < 0) { | |
1286 | if (errno != EAGAIN) { | |
1287 | perror("recv header"); | |
1288 | return 1; | |
1289 | } | |
1290 | usleep(100); | |
1291 | continue; | |
1292 | } else if (!ret) { | |
1293 | usleep(100); | |
1294 | continue; | |
1295 | } else { | |
1296 | p += ret; | |
1297 | bytes_left -= ret; | |
1298 | } | |
1299 | } | |
1300 | fcntl(net_in_fd, F_SETFL, fl & ~O_NONBLOCK); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | static int net_server_loop(void) | |
1305 | { | |
1306 | struct thread_information *tip; | |
1307 | struct blktrace_net_hdr bnh; | |
1308 | ||
1309 | if (net_get_header(&bnh)) | |
1310 | return 1; | |
1311 | ||
1312 | if (data_is_native == -1 && check_data_endianness(bnh.magic)) { | |
1313 | fprintf(stderr, "server: received data is bad\n"); | |
1314 | return 1; | |
1315 | } | |
1316 | ||
1317 | if (!data_is_native) { | |
1318 | bnh.cpu = be32_to_cpu(bnh.cpu); | |
1319 | bnh.len = be32_to_cpu(bnh.len); | |
1320 | } | |
1321 | ||
6a752c90 JA |
1322 | /* |
1323 | * len == 0 means that the other end signalled end-of-run | |
1324 | */ | |
1325 | if (!bnh.len) { | |
1326 | fprintf(stderr, "server: end of run\n"); | |
1327 | return 1; | |
1328 | } | |
1329 | ||
8e86c98a JA |
1330 | tip = net_get_tip(&bnh); |
1331 | if (!tip) | |
1332 | return 1; | |
1333 | ||
1334 | if (mmap_subbuf(tip, bnh.len)) | |
1335 | return 1; | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * Start here when we are in server mode - just fetch data from the network | |
1342 | * and dump to files | |
1343 | */ | |
1344 | static int net_server(void) | |
1345 | { | |
898bbd3b JA |
1346 | struct device_information *dip; |
1347 | struct thread_information *tip; | |
8e86c98a JA |
1348 | struct sockaddr_in addr; |
1349 | socklen_t socklen; | |
22cd0c02 | 1350 | int fd, opt, i, j; |
8e86c98a JA |
1351 | |
1352 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1353 | if (fd < 0) { | |
1354 | perror("server: socket"); | |
1355 | return 1; | |
1356 | } | |
1357 | ||
1358 | opt = 1; | |
1359 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { | |
1360 | perror("setsockopt"); | |
1361 | return 1; | |
1362 | } | |
1363 | ||
1364 | memset(&addr, 0, sizeof(addr)); | |
1365 | addr.sin_family = AF_INET; | |
1366 | addr.sin_addr.s_addr = htonl(INADDR_ANY); | |
1367 | addr.sin_port = htons(net_port); | |
1368 | ||
1369 | if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1370 | perror("bind"); | |
1371 | return 1; | |
1372 | } | |
1373 | ||
1374 | if (listen(fd, 1) < 0) { | |
1375 | perror("listen"); | |
1376 | return 1; | |
1377 | } | |
1378 | ||
6a752c90 | 1379 | repeat: |
bbb1c18a JA |
1380 | signal(SIGINT, NULL); |
1381 | signal(SIGHUP, NULL); | |
1382 | signal(SIGTERM, NULL); | |
1383 | signal(SIGALRM, NULL); | |
1384 | ||
8e86c98a JA |
1385 | printf("blktrace: waiting for incoming connection...\n"); |
1386 | ||
1387 | socklen = sizeof(addr); | |
1388 | net_in_fd = accept(fd, (struct sockaddr *) &addr, &socklen); | |
1389 | if (net_in_fd < 0) { | |
1390 | perror("accept"); | |
1391 | return 1; | |
1392 | } | |
1393 | ||
1394 | signal(SIGINT, handle_sigint); | |
1395 | signal(SIGHUP, handle_sigint); | |
1396 | signal(SIGTERM, handle_sigint); | |
1397 | signal(SIGALRM, handle_sigint); | |
1398 | ||
e85ee0f2 | 1399 | printf("blktrace: connection from %s\n", inet_ntoa(addr.sin_addr)); |
8e86c98a JA |
1400 | |
1401 | while (!is_done()) { | |
1402 | if (net_server_loop()) | |
1403 | break; | |
1404 | } | |
1405 | ||
898bbd3b JA |
1406 | for_each_dip(dip, i) |
1407 | for_each_tip(dip, tip, j) | |
1408 | tip_ftrunc_final(tip); | |
8e86c98a | 1409 | |
410d7c62 | 1410 | show_stats(); |
6a752c90 JA |
1411 | |
1412 | if (is_done()) | |
1413 | return 0; | |
1414 | ||
898bbd3b JA |
1415 | /* |
1416 | * cleanup for next run | |
1417 | */ | |
1418 | for_each_dip(dip, i) { | |
1419 | for_each_tip(dip, tip, j) | |
1420 | fclose(tip->ofile); | |
1421 | ||
1422 | free(dip->threads); | |
1423 | } | |
1424 | ||
1425 | free(device_information); | |
1426 | device_information = NULL; | |
1427 | ncpus = ndevs = 0; | |
b46a0342 JA |
1428 | |
1429 | close(net_in_fd); | |
1430 | net_in_fd = -1; | |
6a752c90 | 1431 | goto repeat; |
8e86c98a JA |
1432 | } |
1433 | ||
1434 | /* | |
1435 | * Setup outgoing network connection where we will transmit data | |
1436 | */ | |
1437 | static int net_setup_client(void) | |
1438 | { | |
1439 | struct sockaddr_in addr; | |
1440 | int fd; | |
1441 | ||
1442 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1443 | if (fd < 0) { | |
1444 | perror("client: socket"); | |
1445 | return 1; | |
1446 | } | |
1447 | ||
1448 | memset(&addr, 0, sizeof(addr)); | |
1449 | addr.sin_family = AF_INET; | |
1450 | addr.sin_port = htons(net_port); | |
1451 | ||
1452 | if (inet_aton(hostname, &addr.sin_addr) != 1) { | |
1453 | struct hostent *hent = gethostbyname(hostname); | |
1454 | if (!hent) { | |
1455 | perror("gethostbyname"); | |
1456 | return 1; | |
1457 | } | |
1458 | ||
1459 | memcpy(&addr.sin_addr, hent->h_addr, 4); | |
1460 | strcpy(hostname, hent->h_name); | |
1461 | } | |
1462 | ||
1463 | printf("blktrace: connecting to %s\n", hostname); | |
1464 | ||
1465 | if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1466 | perror("client: connect"); | |
1467 | return 1; | |
1468 | } | |
1469 | ||
1470 | printf("blktrace: connected!\n"); | |
1471 | net_out_fd = fd; | |
1472 | return 0; | |
1473 | } | |
1474 | ||
52724a0e JA |
1475 | static char usage_str[] = \ |
1476 | "-d <dev> [ -r relay path ] [ -o <output> ] [-k ] [ -w time ]\n" \ | |
1477 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ | |
1478 | "\t-d Use specified device. May also be given last after options\n" \ | |
1479 | "\t-r Path to mounted relayfs, defaults to /relay\n" \ | |
1480 | "\t-o File(s) to send output to\n" \ | |
d1d7f15f | 1481 | "\t-D Directory to prepend to output file names\n" \ |
52724a0e JA |
1482 | "\t-k Kill a running trace\n" \ |
1483 | "\t-w Stop after defined time, in seconds\n" \ | |
1484 | "\t-a Only trace specified actions. See documentation\n" \ | |
1485 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
1486 | "\t-b Sub buffer size in KiB\n" \ |
1487 | "\t-n Number of sub buffers\n" \ | |
f531b94d JA |
1488 | "\t-l Run in network listen mode (blktrace server)\n" \ |
1489 | "\t-h Run in network client mode, connecting to the given host\n" \ | |
1490 | "\t-p Network port to use (default 8462)\n" \ | |
1491 | "\t-s Make the network client use sendfile() to transfer data\n" \ | |
1492 | "\t-V Print program version info\n\n"; | |
52724a0e | 1493 | |
ee1f4158 NS |
1494 | static void show_usage(char *program) |
1495 | { | |
52724a0e | 1496 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 | 1497 | } |
d0ca268b JA |
1498 | |
1499 | int main(int argc, char *argv[]) | |
1500 | { | |
5270dddd | 1501 | static char default_relay_path[] = "/relay"; |
e3e74029 | 1502 | struct statfs st; |
d39c04ca | 1503 | int i, c; |
ece238a6 | 1504 | int stop_watch = 0; |
d39c04ca AB |
1505 | int act_mask_tmp = 0; |
1506 | ||
1507 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
1508 | switch (c) { | |
1509 | case 'a': | |
1510 | i = find_mask_map(optarg); | |
1511 | if (i < 0) { | |
ab197ca7 | 1512 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 1513 | optarg); |
7425d456 | 1514 | return 1; |
d39c04ca AB |
1515 | } |
1516 | act_mask_tmp |= i; | |
1517 | break; | |
1518 | ||
1519 | case 'A': | |
98f8386b AB |
1520 | if ((sscanf(optarg, "%x", &i) != 1) || |
1521 | !valid_act_opt(i)) { | |
d39c04ca | 1522 | fprintf(stderr, |
ab197ca7 | 1523 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 1524 | optarg, i); |
7425d456 | 1525 | return 1; |
d39c04ca AB |
1526 | } |
1527 | act_mask_tmp = i; | |
1528 | break; | |
d0ca268b | 1529 | |
d39c04ca | 1530 | case 'd': |
e7c9f3ff NS |
1531 | if (resize_devices(optarg) != 0) |
1532 | return 1; | |
d39c04ca AB |
1533 | break; |
1534 | ||
5270dddd JA |
1535 | case 'r': |
1536 | relay_path = optarg; | |
1537 | break; | |
1538 | ||
d5396421 | 1539 | case 'o': |
66efebf8 | 1540 | output_name = optarg; |
d5396421 | 1541 | break; |
bc39777c JA |
1542 | case 'k': |
1543 | kill_running_trace = 1; | |
1544 | break; | |
ece238a6 NS |
1545 | case 'w': |
1546 | stop_watch = atoi(optarg); | |
1547 | if (stop_watch <= 0) { | |
1548 | fprintf(stderr, | |
1549 | "Invalid stopwatch value (%d secs)\n", | |
1550 | stop_watch); | |
1551 | return 1; | |
1552 | } | |
1553 | break; | |
57ea8602 | 1554 | case 'V': |
52724a0e JA |
1555 | printf("%s version %s\n", argv[0], blktrace_version); |
1556 | return 0; | |
129aa440 | 1557 | case 'b': |
eb3c8108 | 1558 | buf_size = strtoul(optarg, NULL, 10); |
183a0855 | 1559 | if (buf_size <= 0 || buf_size > 16*1024) { |
129aa440 | 1560 | fprintf(stderr, |
eb3c8108 | 1561 | "Invalid buffer size (%lu)\n",buf_size); |
129aa440 JA |
1562 | return 1; |
1563 | } | |
1564 | buf_size <<= 10; | |
1565 | break; | |
1566 | case 'n': | |
eb3c8108 | 1567 | buf_nr = strtoul(optarg, NULL, 10); |
129aa440 JA |
1568 | if (buf_nr <= 0) { |
1569 | fprintf(stderr, | |
eb3c8108 | 1570 | "Invalid buffer nr (%lu)\n", buf_nr); |
129aa440 JA |
1571 | return 1; |
1572 | } | |
1573 | break; | |
d1d7f15f JA |
1574 | case 'D': |
1575 | output_dir = optarg; | |
1576 | break; | |
8e86c98a JA |
1577 | case 'h': |
1578 | net_mode = Net_client; | |
1579 | strcpy(hostname, optarg); | |
1580 | break; | |
1581 | case 'l': | |
1582 | net_mode = Net_server; | |
1583 | break; | |
1584 | case 'p': | |
1585 | net_port = atoi(optarg); | |
1586 | break; | |
32f18c48 JA |
1587 | case 's': |
1588 | net_sendfile = 1; | |
1589 | break; | |
d39c04ca | 1590 | default: |
ee1f4158 | 1591 | show_usage(argv[0]); |
7425d456 | 1592 | return 1; |
d39c04ca AB |
1593 | } |
1594 | } | |
1595 | ||
8e86c98a JA |
1596 | setlocale(LC_NUMERIC, "en_US"); |
1597 | ||
1598 | page_size = getpagesize(); | |
1599 | ||
1600 | if (net_mode == Net_server) | |
1601 | return net_server(); | |
1602 | ||
22cd0c02 JA |
1603 | while (optind < argc) { |
1604 | if (resize_devices(argv[optind++]) != 0) | |
1605 | return 1; | |
1606 | } | |
1607 | ||
e7c9f3ff | 1608 | if (ndevs == 0) { |
ee1f4158 | 1609 | show_usage(argv[0]); |
7425d456 | 1610 | return 1; |
d39c04ca AB |
1611 | } |
1612 | ||
5270dddd JA |
1613 | if (!relay_path) |
1614 | relay_path = default_relay_path; | |
1615 | ||
d5396421 | 1616 | if (act_mask_tmp != 0) |
d39c04ca | 1617 | act_mask = act_mask_tmp; |
d0ca268b | 1618 | |
e3e74029 NS |
1619 | if (statfs(relay_path, &st) < 0) { |
1620 | perror("statfs"); | |
1621 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
1622 | relay_path); | |
1623 | return 1; | |
64acacae | 1624 | } else if (st.f_type != (long) RELAYFS_TYPE) { |
e3e74029 | 1625 | fprintf(stderr,"%s does not appear to be a relay filesystem\n", |
d0ca268b | 1626 | relay_path); |
7425d456 | 1627 | return 1; |
d0ca268b JA |
1628 | } |
1629 | ||
e7c9f3ff | 1630 | if (open_devices() != 0) |
7425d456 | 1631 | return 1; |
bc39777c JA |
1632 | |
1633 | if (kill_running_trace) { | |
e7c9f3ff | 1634 | stop_all_traces(); |
7425d456 | 1635 | return 0; |
bc39777c JA |
1636 | } |
1637 | ||
e7c9f3ff NS |
1638 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
1639 | if (ncpus < 0) { | |
1640 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 1641 | return 1; |
d0ca268b JA |
1642 | } |
1643 | ||
d0ca268b JA |
1644 | signal(SIGINT, handle_sigint); |
1645 | signal(SIGHUP, handle_sigint); | |
1646 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 1647 | signal(SIGALRM, handle_sigint); |
d0ca268b | 1648 | |
8e86c98a JA |
1649 | if (net_mode == Net_client && net_setup_client()) |
1650 | return 1; | |
1651 | ||
1652 | if (start_devices() != 0) | |
1653 | return 1; | |
1654 | ||
e7c9f3ff | 1655 | atexit(stop_all_tracing); |
830fd65c | 1656 | |
ece238a6 NS |
1657 | if (stop_watch) |
1658 | alarm(stop_watch); | |
1659 | ||
b7106311 | 1660 | wait_for_threads(); |
d0ca268b | 1661 | |
eb3c8108 JA |
1662 | if (!is_trace_stopped()) { |
1663 | trace_stopped = 1; | |
91816d54 JA |
1664 | stop_all_threads(); |
1665 | stop_all_traces(); | |
91816d54 | 1666 | } |
d0ca268b | 1667 | |
eb3c8108 JA |
1668 | show_stats(); |
1669 | ||
d0ca268b JA |
1670 | return 0; |
1671 | } | |
1672 |