Commit | Line | Data |
---|---|---|
d0ca268b JA |
1 | /* |
2 | * block queue tracing application | |
3 | * | |
d956a2cd | 4 | * Copyright (C) 2005 Jens Axboe <axboe@suse.de> |
46e37c55 | 5 | * Copyright (C) 2006 Jens Axboe <axboe@kernel.dk> |
d956a2cd JA |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
d0ca268b JA |
21 | */ |
22 | #include <pthread.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <unistd.h> | |
26 | #include <locale.h> | |
27 | #include <signal.h> | |
28 | #include <fcntl.h> | |
29 | #include <string.h> | |
30 | #include <sys/ioctl.h> | |
b9d4294e | 31 | #include <sys/param.h> |
e3e74029 | 32 | #include <sys/statfs.h> |
eb3c8108 | 33 | #include <sys/poll.h> |
b7106311 | 34 | #include <sys/mman.h> |
8e86c98a | 35 | #include <sys/socket.h> |
d0ca268b JA |
36 | #include <stdio.h> |
37 | #include <stdlib.h> | |
38 | #include <sched.h> | |
d39c04ca AB |
39 | #include <ctype.h> |
40 | #include <getopt.h> | |
da39451f | 41 | #include <errno.h> |
8e86c98a JA |
42 | #include <netinet/in.h> |
43 | #include <arpa/inet.h> | |
44 | #include <netdb.h> | |
32f18c48 | 45 | #include <sys/sendfile.h> |
d0ca268b JA |
46 | |
47 | #include "blktrace.h" | |
21f55651 | 48 | #include "barrier.h" |
d0ca268b | 49 | |
d84dec8e | 50 | static char blktrace_version[] = "0.99.2"; |
52724a0e | 51 | |
8f551a39 JA |
52 | /* |
53 | * You may want to increase this even more, if you are logging at a high | |
54 | * rate and see skipped/missed events | |
55 | */ | |
007c233c | 56 | #define BUF_SIZE (512 * 1024) |
d0ca268b JA |
57 | #define BUF_NR (4) |
58 | ||
007c233c JA |
59 | #define OFILE_BUF (128 * 1024) |
60 | ||
3d06efea | 61 | #define DEBUGFS_TYPE 0x64626720 |
e3e74029 | 62 | |
32f18c48 | 63 | #define S_OPTS "d:a:A:r:o:kw:Vb:n:D:lh:p:s" |
d5396421 | 64 | static struct option l_opts[] = { |
5c86134e | 65 | { |
d39c04ca | 66 | .name = "dev", |
428683db | 67 | .has_arg = required_argument, |
d39c04ca AB |
68 | .flag = NULL, |
69 | .val = 'd' | |
70 | }, | |
5c86134e | 71 | { |
d39c04ca | 72 | .name = "act-mask", |
428683db | 73 | .has_arg = required_argument, |
d39c04ca AB |
74 | .flag = NULL, |
75 | .val = 'a' | |
76 | }, | |
5c86134e | 77 | { |
d39c04ca | 78 | .name = "set-mask", |
428683db | 79 | .has_arg = required_argument, |
d39c04ca AB |
80 | .flag = NULL, |
81 | .val = 'A' | |
82 | }, | |
5c86134e | 83 | { |
5270dddd | 84 | .name = "relay", |
428683db | 85 | .has_arg = required_argument, |
5270dddd JA |
86 | .flag = NULL, |
87 | .val = 'r' | |
88 | }, | |
d5396421 JA |
89 | { |
90 | .name = "output", | |
428683db | 91 | .has_arg = required_argument, |
d5396421 JA |
92 | .flag = NULL, |
93 | .val = 'o' | |
94 | }, | |
bc39777c JA |
95 | { |
96 | .name = "kill", | |
428683db | 97 | .has_arg = no_argument, |
bc39777c JA |
98 | .flag = NULL, |
99 | .val = 'k' | |
100 | }, | |
ece238a6 NS |
101 | { |
102 | .name = "stopwatch", | |
428683db | 103 | .has_arg = required_argument, |
ece238a6 NS |
104 | .flag = NULL, |
105 | .val = 'w' | |
106 | }, | |
52724a0e JA |
107 | { |
108 | .name = "version", | |
109 | .has_arg = no_argument, | |
110 | .flag = NULL, | |
57ea8602 | 111 | .val = 'V' |
52724a0e | 112 | }, |
129aa440 | 113 | { |
3f65c585 | 114 | .name = "buffer-size", |
129aa440 JA |
115 | .has_arg = required_argument, |
116 | .flag = NULL, | |
117 | .val = 'b' | |
118 | }, | |
119 | { | |
3f65c585 | 120 | .name = "num-sub-buffers", |
129aa440 JA |
121 | .has_arg = required_argument, |
122 | .flag = NULL, | |
123 | .val = 'n' | |
124 | }, | |
d1d7f15f | 125 | { |
3f65c585 | 126 | .name = "output-dir", |
d1d7f15f JA |
127 | .has_arg = required_argument, |
128 | .flag = NULL, | |
129 | .val = 'D' | |
130 | }, | |
8e86c98a JA |
131 | { |
132 | .name = "listen", | |
133 | .has_arg = no_argument, | |
134 | .flag = NULL, | |
135 | .val = 'l' | |
136 | }, | |
137 | { | |
138 | .name = "host", | |
139 | .has_arg = required_argument, | |
140 | .flag = NULL, | |
141 | .val = 'h' | |
142 | }, | |
143 | { | |
144 | .name = "port", | |
145 | .has_arg = required_argument, | |
146 | .flag = NULL, | |
147 | .val = 'p' | |
148 | }, | |
32f18c48 | 149 | { |
79971f43 | 150 | .name = "no-sendfile", |
32f18c48 JA |
151 | .has_arg = no_argument, |
152 | .flag = NULL, | |
153 | .val = 's' | |
154 | }, | |
71ef8b7c JA |
155 | { |
156 | .name = NULL, | |
157 | } | |
d39c04ca AB |
158 | }; |
159 | ||
9db17354 | 160 | struct tip_subbuf { |
9db17354 | 161 | void *buf; |
5be4bdaf JA |
162 | unsigned int len; |
163 | unsigned int max_len; | |
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 | ||
007c233c JA |
183 | FILE *ofile; |
184 | char *ofile_buffer; | |
32f18c48 | 185 | off_t ofile_offset; |
9db17354 | 186 | int ofile_stdout; |
8e86c98a | 187 | int ofile_mmap; |
007c233c | 188 | |
0cc7d25e JA |
189 | int (*get_subbuf)(struct thread_information *, unsigned int); |
190 | int (*flush_subbuf)(struct thread_information *, struct tip_subbuf *); | |
191 | int (*read_data)(struct thread_information *, void *, unsigned int); | |
192 | ||
d0ca268b | 193 | unsigned long events_processed; |
b7106311 | 194 | unsigned long long data_read; |
bcbeb60f | 195 | unsigned long long data_queued; |
e7c9f3ff | 196 | struct device_information *device; |
9db17354 JA |
197 | |
198 | int exited; | |
199 | ||
b7106311 JA |
200 | /* |
201 | * piped fifo buffers | |
202 | */ | |
21f55651 | 203 | struct tip_subbuf_fifo fifo; |
7de86b12 | 204 | struct tip_subbuf *leftover_ts; |
b7106311 JA |
205 | |
206 | /* | |
207 | * mmap controlled output files | |
208 | */ | |
209 | unsigned long long fs_size; | |
210 | unsigned long long fs_max_size; | |
211 | unsigned long fs_off; | |
212 | void *fs_buf; | |
213 | unsigned long fs_buf_len; | |
ff11d54c TZ |
214 | |
215 | struct net_connection *nc; | |
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 | 224 | struct thread_information *threads; |
6a6d3f0f TZ |
225 | unsigned long buf_size; |
226 | unsigned long buf_nr; | |
227 | unsigned int page_size; | |
ff11d54c TZ |
228 | |
229 | struct cl_host *ch; | |
230 | u32 cl_id; | |
231 | time_t cl_connect_time; | |
e7c9f3ff | 232 | }; |
d0ca268b | 233 | |
e7c9f3ff | 234 | static int ncpus; |
d0ca268b | 235 | static struct thread_information *thread_information; |
e7c9f3ff NS |
236 | static int ndevs; |
237 | static struct device_information *device_information; | |
238 | ||
239 | /* command line option globals */ | |
3d06efea | 240 | static char *debugfs_path; |
d5396421 | 241 | static char *output_name; |
d1d7f15f | 242 | static char *output_dir; |
5c86134e | 243 | static int act_mask = ~0U; |
bc39777c | 244 | static int kill_running_trace; |
eb3c8108 JA |
245 | static unsigned long buf_size = BUF_SIZE; |
246 | static unsigned long buf_nr = BUF_NR; | |
b7106311 | 247 | static unsigned int page_size; |
d39c04ca | 248 | |
e7c9f3ff NS |
249 | #define is_done() (*(volatile int *)(&done)) |
250 | static volatile int done; | |
251 | ||
eb3c8108 JA |
252 | #define is_trace_stopped() (*(volatile int *)(&trace_stopped)) |
253 | static volatile int trace_stopped; | |
254 | ||
255 | #define is_stat_shown() (*(volatile int *)(&stat_shown)) | |
256 | static volatile int stat_shown; | |
a3e4d330 | 257 | |
8e86c98a JA |
258 | int data_is_native = -1; |
259 | ||
72ca8801 NS |
260 | static void exit_trace(int status); |
261 | ||
99c1f5ab JA |
262 | #define dip_tracing(dip) (*(volatile int *)(&(dip)->trace_started)) |
263 | #define dip_set_tracing(dip, v) ((dip)->trace_started = (v)) | |
264 | ||
ce020676 | 265 | #define __for_each_dip(__d, __di, __e, __i) \ |
e0a1988b JA |
266 | for (__i = 0, __d = __di; __i < __e; __i++, __d++) |
267 | ||
268 | #define for_each_dip(__d, __i) \ | |
ce020676 | 269 | __for_each_dip(__d, device_information, ndevs, __i) |
e0a1988b | 270 | #define for_each_nc_dip(__nc, __d, __i) \ |
ff11d54c | 271 | __for_each_dip(__d, (__nc)->ch->device_information, (__nc)->ch->ndevs, __i) |
99c1f5ab | 272 | |
ce020676 JA |
273 | #define __for_each_tip(__d, __t, __ncpus, __j) \ |
274 | for (__j = 0, __t = (__d)->threads; __j < __ncpus; __j++, __t++) | |
9db17354 | 275 | #define for_each_tip(__d, __t, __j) \ |
ce020676 | 276 | __for_each_tip(__d, __t, ncpus, __j) |
ff11d54c TZ |
277 | #define for_each_cl_host(__c) \ |
278 | for (__c = cl_host_list; __c; __c = __c->list_next) | |
99c1f5ab | 279 | |
8e86c98a JA |
280 | /* |
281 | * networking stuff follows. we include a magic number so we know whether | |
282 | * to endianness convert or not | |
283 | */ | |
284 | struct blktrace_net_hdr { | |
285 | u32 magic; /* same as trace magic */ | |
22cd0c02 | 286 | char buts_name[32]; /* trace name */ |
8e86c98a | 287 | u32 cpu; /* for which cpu */ |
22cd0c02 | 288 | u32 max_cpus; |
8e86c98a | 289 | u32 len; /* length of following trace data */ |
ff11d54c | 290 | u32 cl_id; /* id for set of client per-cpu connections */ |
6a6d3f0f TZ |
291 | u32 buf_size; /* client buf_size for this trace */ |
292 | u32 buf_nr; /* client buf_nr for this trace */ | |
293 | u32 page_size; /* client page_size for this trace */ | |
8e86c98a JA |
294 | }; |
295 | ||
296 | #define TRACE_NET_PORT (8462) | |
297 | ||
298 | enum { | |
299 | Net_none = 0, | |
300 | Net_server, | |
301 | Net_client, | |
302 | }; | |
303 | ||
304 | /* | |
305 | * network cmd line params | |
306 | */ | |
307 | static char hostname[MAXHOSTNAMELEN]; | |
308 | static int net_port = TRACE_NET_PORT; | |
309 | static int net_mode = 0; | |
79971f43 | 310 | static int net_use_sendfile = 1; |
8e86c98a | 311 | |
ff11d54c TZ |
312 | struct cl_host { |
313 | struct cl_host *list_next; | |
e0a1988b | 314 | struct in_addr cl_in_addr; |
ff11d54c TZ |
315 | struct net_connection *net_connections; |
316 | int nconn; | |
e0a1988b JA |
317 | struct device_information *device_information; |
318 | int ndevs; | |
319 | int ncpus; | |
ff11d54c | 320 | int ndevs_done; |
e0a1988b JA |
321 | }; |
322 | ||
ff11d54c TZ |
323 | struct net_connection { |
324 | int in_fd; | |
325 | struct pollfd pfd; | |
326 | time_t connect_time; | |
327 | struct cl_host *ch; | |
328 | int ncpus; | |
329 | }; | |
330 | ||
331 | #define NET_MAX_CL_HOSTS (1024) | |
332 | static struct cl_host *cl_host_list; | |
333 | static int cl_hosts; | |
e0a1988b | 334 | static int net_connects; |
ff11d54c TZ |
335 | |
336 | static int *net_out_fd; | |
8e86c98a JA |
337 | |
338 | static void handle_sigint(__attribute__((__unused__)) int sig) | |
339 | { | |
7035d92d JA |
340 | struct device_information *dip; |
341 | int i; | |
342 | ||
343 | /* | |
344 | * stop trace so we can reap currently produced data | |
345 | */ | |
346 | for_each_dip(dip, i) { | |
921b05fe JA |
347 | if (dip->fd == -1) |
348 | continue; | |
7035d92d JA |
349 | if (ioctl(dip->fd, BLKTRACESTOP) < 0) |
350 | perror("BLKTRACESTOP"); | |
351 | } | |
352 | ||
8e86c98a JA |
353 | done = 1; |
354 | } | |
355 | ||
eb3c8108 JA |
356 | static int get_dropped_count(const char *buts_name) |
357 | { | |
358 | int fd; | |
359 | char tmp[MAXPATHLEN + 64]; | |
360 | ||
361 | snprintf(tmp, sizeof(tmp), "%s/block/%s/dropped", | |
3d06efea | 362 | debugfs_path, buts_name); |
eb3c8108 JA |
363 | |
364 | fd = open(tmp, O_RDONLY); | |
365 | if (fd < 0) { | |
366 | /* | |
367 | * this may be ok, if the kernel doesn't support dropped counts | |
368 | */ | |
369 | if (errno == ENOENT) | |
370 | return 0; | |
371 | ||
372 | fprintf(stderr, "Couldn't open dropped file %s\n", tmp); | |
373 | return -1; | |
374 | } | |
375 | ||
376 | if (read(fd, tmp, sizeof(tmp)) < 0) { | |
377 | perror(tmp); | |
378 | close(fd); | |
379 | return -1; | |
380 | } | |
381 | ||
382 | close(fd); | |
383 | ||
384 | return atoi(tmp); | |
385 | } | |
386 | ||
e7c9f3ff | 387 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
388 | { |
389 | struct blk_user_trace_setup buts; | |
390 | ||
1f79c4a0 | 391 | memset(&buts, 0, sizeof(buts)); |
6a6d3f0f TZ |
392 | buts.buf_size = dip->buf_size; |
393 | buts.buf_nr = dip->buf_nr; | |
d39c04ca | 394 | buts.act_mask = act_mask; |
d0ca268b | 395 | |
ed71a31e JA |
396 | if (ioctl(dip->fd, BLKTRACESETUP, &buts) < 0) { |
397 | perror("BLKTRACESETUP"); | |
398 | return 1; | |
399 | } | |
400 | ||
401 | if (ioctl(dip->fd, BLKTRACESTART) < 0) { | |
402 | perror("BLKTRACESTART"); | |
d0ca268b JA |
403 | return 1; |
404 | } | |
405 | ||
e7c9f3ff | 406 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
99c1f5ab | 407 | dip_set_tracing(dip, 1); |
d0ca268b JA |
408 | return 0; |
409 | } | |
410 | ||
e7c9f3ff | 411 | static void stop_trace(struct device_information *dip) |
d0ca268b | 412 | { |
99c1f5ab JA |
413 | if (dip_tracing(dip) || kill_running_trace) { |
414 | dip_set_tracing(dip, 0); | |
cf9208ea | 415 | |
7035d92d JA |
416 | /* |
417 | * should be stopped, just don't complain if it isn't | |
418 | */ | |
419 | ioctl(dip->fd, BLKTRACESTOP); | |
420 | ||
ed71a31e JA |
421 | if (ioctl(dip->fd, BLKTRACETEARDOWN) < 0) |
422 | perror("BLKTRACETEARDOWN"); | |
cf9208ea | 423 | |
e7c9f3ff | 424 | close(dip->fd); |
cf9208ea | 425 | dip->fd = -1; |
707b0914 | 426 | } |
d0ca268b JA |
427 | } |
428 | ||
e7c9f3ff NS |
429 | static void stop_all_traces(void) |
430 | { | |
431 | struct device_information *dip; | |
432 | int i; | |
433 | ||
eb3c8108 JA |
434 | for_each_dip(dip, i) { |
435 | dip->drop_count = get_dropped_count(dip->buts_name); | |
e7c9f3ff | 436 | stop_trace(dip); |
eb3c8108 | 437 | } |
e7c9f3ff NS |
438 | } |
439 | ||
ff11d54c | 440 | static void wait_for_data(struct thread_information *tip, int timeout) |
eb3c8108 | 441 | { |
ff11d54c | 442 | struct pollfd pfd = { .fd = tip->fd, .events = POLLIN }; |
eb3c8108 | 443 | |
ff11d54c TZ |
444 | while (!is_done()) { |
445 | if (poll(&pfd, 1, timeout) < 0) { | |
7934e668 JA |
446 | perror("poll"); |
447 | break; | |
448 | } | |
ff11d54c | 449 | if (pfd.revents & POLLIN) |
9db17354 JA |
450 | break; |
451 | if (tip->ofile_stdout) | |
452 | break; | |
ff11d54c | 453 | } |
eb3c8108 JA |
454 | } |
455 | ||
0cc7d25e JA |
456 | static int read_data_file(struct thread_information *tip, void *buf, |
457 | unsigned int len) | |
d0ca268b | 458 | { |
ae9f71b3 | 459 | int ret = 0; |
bbabf03a | 460 | |
9db17354 | 461 | do { |
ff11d54c | 462 | wait_for_data(tip, 100); |
ae9f71b3 | 463 | |
9db17354 JA |
464 | ret = read(tip->fd, buf, len); |
465 | if (!ret) | |
466 | continue; | |
467 | else if (ret > 0) | |
468 | return ret; | |
469 | else { | |
bbabf03a | 470 | if (errno != EAGAIN) { |
a3e4d330 JA |
471 | perror(tip->fn); |
472 | fprintf(stderr,"Thread %d failed read of %s\n", | |
473 | tip->cpu, tip->fn); | |
474 | break; | |
475 | } | |
9db17354 | 476 | continue; |
bbabf03a | 477 | } |
9db17354 | 478 | } while (!is_done()); |
8a43bac5 | 479 | |
bbabf03a | 480 | return ret; |
8e86c98a | 481 | |
8a43bac5 JA |
482 | } |
483 | ||
0cc7d25e JA |
484 | static int read_data_net(struct thread_information *tip, void *buf, |
485 | unsigned int len) | |
8e86c98a | 486 | { |
ff11d54c | 487 | struct net_connection *nc = tip->nc; |
8e86c98a JA |
488 | unsigned int bytes_left = len; |
489 | int ret = 0; | |
490 | ||
491 | do { | |
e0a1988b | 492 | ret = recv(nc->in_fd, buf, bytes_left, MSG_WAITALL); |
8e86c98a JA |
493 | |
494 | if (!ret) | |
495 | continue; | |
496 | else if (ret < 0) { | |
497 | if (errno != EAGAIN) { | |
498 | perror(tip->fn); | |
499 | fprintf(stderr, "server: failed read\n"); | |
500 | return 0; | |
501 | } | |
502 | continue; | |
503 | } else { | |
504 | buf += ret; | |
505 | bytes_left -= ret; | |
506 | } | |
507 | } while (!is_done() && bytes_left); | |
508 | ||
410d7c62 | 509 | return len - bytes_left; |
8e86c98a JA |
510 | } |
511 | ||
8e86c98a JA |
512 | static inline struct tip_subbuf * |
513 | subbuf_fifo_dequeue(struct thread_information *tip) | |
a3e4d330 | 514 | { |
21f55651 JA |
515 | const int head = tip->fifo.head; |
516 | const int next = (head + 1) & (FIFO_SIZE - 1); | |
517 | ||
518 | if (head != tip->fifo.tail) { | |
519 | struct tip_subbuf *ts = tip->fifo.q[head]; | |
520 | ||
521 | store_barrier(); | |
522 | tip->fifo.head = next; | |
523 | return ts; | |
524 | } | |
525 | ||
526 | return NULL; | |
9db17354 | 527 | } |
eb3c8108 | 528 | |
21f55651 JA |
529 | static inline int subbuf_fifo_queue(struct thread_information *tip, |
530 | struct tip_subbuf *ts) | |
9db17354 | 531 | { |
21f55651 JA |
532 | const int tail = tip->fifo.tail; |
533 | const int next = (tail + 1) & (FIFO_SIZE - 1); | |
534 | ||
535 | if (next != tip->fifo.head) { | |
536 | tip->fifo.q[tail] = ts; | |
537 | store_barrier(); | |
538 | tip->fifo.tail = next; | |
539 | return 0; | |
540 | } | |
541 | ||
542 | fprintf(stderr, "fifo too small!\n"); | |
543 | return 1; | |
a3e4d330 JA |
544 | } |
545 | ||
b7106311 JA |
546 | /* |
547 | * For file output, truncate and mmap the file appropriately | |
548 | */ | |
8e86c98a | 549 | static int mmap_subbuf(struct thread_information *tip, unsigned int maxlen) |
b7106311 JA |
550 | { |
551 | int ofd = fileno(tip->ofile); | |
552 | int ret; | |
6a6d3f0f | 553 | unsigned long nr; |
b7106311 JA |
554 | |
555 | /* | |
556 | * extend file, if we have to. use chunks of 16 subbuffers. | |
557 | */ | |
6a6d3f0f | 558 | if (tip->fs_off + maxlen > tip->fs_buf_len) { |
b7106311 | 559 | if (tip->fs_buf) { |
5975d309 | 560 | munlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
561 | munmap(tip->fs_buf, tip->fs_buf_len); |
562 | tip->fs_buf = NULL; | |
563 | } | |
564 | ||
6a6d3f0f TZ |
565 | tip->fs_off = tip->fs_size & (tip->device->page_size - 1); |
566 | nr = max(16, tip->device->buf_nr); | |
567 | tip->fs_buf_len = (nr * tip->device->buf_size) - tip->fs_off; | |
b7106311 JA |
568 | tip->fs_max_size += tip->fs_buf_len; |
569 | ||
570 | if (ftruncate(ofd, tip->fs_max_size) < 0) { | |
571 | perror("ftruncate"); | |
572 | return -1; | |
573 | } | |
574 | ||
575 | tip->fs_buf = mmap(NULL, tip->fs_buf_len, PROT_WRITE, | |
576 | MAP_SHARED, ofd, tip->fs_size - tip->fs_off); | |
577 | if (tip->fs_buf == MAP_FAILED) { | |
578 | perror("mmap"); | |
579 | return -1; | |
580 | } | |
5975d309 | 581 | mlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
582 | } |
583 | ||
7934e668 | 584 | ret = tip->read_data(tip, tip->fs_buf + tip->fs_off, maxlen); |
b7106311 | 585 | if (ret >= 0) { |
dbfbd6db | 586 | tip->data_read += ret; |
b7106311 JA |
587 | tip->fs_size += ret; |
588 | tip->fs_off += ret; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | return -1; | |
593 | } | |
594 | ||
18eed2a7 JA |
595 | /* |
596 | * Use the copy approach for pipes and network | |
597 | */ | |
598 | static int get_subbuf(struct thread_information *tip, unsigned int maxlen) | |
599 | { | |
600 | struct tip_subbuf *ts = malloc(sizeof(*ts)); | |
601 | int ret; | |
602 | ||
6a6d3f0f | 603 | ts->buf = malloc(tip->device->buf_size); |
18eed2a7 JA |
604 | ts->max_len = maxlen; |
605 | ||
7934e668 | 606 | ret = tip->read_data(tip, ts->buf, ts->max_len); |
18eed2a7 JA |
607 | if (ret > 0) { |
608 | ts->len = ret; | |
dbfbd6db | 609 | tip->data_read += ret; |
7035d92d | 610 | if (subbuf_fifo_queue(tip, ts)) |
2f064793 JA |
611 | ret = -1; |
612 | } | |
613 | ||
614 | if (ret <= 0) { | |
615 | free(ts->buf); | |
616 | free(ts); | |
18eed2a7 JA |
617 | } |
618 | ||
619 | return ret; | |
620 | } | |
621 | ||
9db17354 | 622 | static void close_thread(struct thread_information *tip) |
a3e4d330 | 623 | { |
9db17354 JA |
624 | if (tip->fd != -1) |
625 | close(tip->fd); | |
626 | if (tip->ofile) | |
627 | fclose(tip->ofile); | |
628 | if (tip->ofile_buffer) | |
629 | free(tip->ofile_buffer); | |
630 | if (tip->fd_buf) | |
631 | free(tip->fd_buf); | |
1c99bc21 | 632 | |
9db17354 JA |
633 | tip->fd = -1; |
634 | tip->ofile = NULL; | |
635 | tip->ofile_buffer = NULL; | |
636 | tip->fd_buf = NULL; | |
a3e4d330 JA |
637 | } |
638 | ||
8e86c98a JA |
639 | static void tip_ftrunc_final(struct thread_information *tip) |
640 | { | |
641 | /* | |
642 | * truncate to right size and cleanup mmap | |
643 | */ | |
c196b5f2 | 644 | if (tip->ofile_mmap && tip->ofile) { |
8e86c98a JA |
645 | int ofd = fileno(tip->ofile); |
646 | ||
647 | if (tip->fs_buf) | |
648 | munmap(tip->fs_buf, tip->fs_buf_len); | |
649 | ||
650 | ftruncate(ofd, tip->fs_size); | |
651 | } | |
652 | } | |
653 | ||
9db17354 | 654 | static void *thread_main(void *arg) |
a3e4d330 | 655 | { |
9db17354 JA |
656 | struct thread_information *tip = arg; |
657 | pid_t pid = getpid(); | |
658 | cpu_set_t cpu_mask; | |
a3e4d330 | 659 | |
9db17354 JA |
660 | CPU_ZERO(&cpu_mask); |
661 | CPU_SET((tip->cpu), &cpu_mask); | |
a3e4d330 | 662 | |
9db17354 JA |
663 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { |
664 | perror("sched_setaffinity"); | |
665 | exit_trace(1); | |
666 | } | |
a3e4d330 | 667 | |
9db17354 | 668 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
3d06efea | 669 | debugfs_path, tip->device->buts_name, tip->cpu); |
9db17354 JA |
670 | tip->fd = open(tip->fn, O_RDONLY); |
671 | if (tip->fd < 0) { | |
672 | perror(tip->fn); | |
673 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, | |
674 | tip->fn); | |
675 | exit_trace(1); | |
a3e4d330 JA |
676 | } |
677 | ||
b7106311 | 678 | while (!is_done()) { |
6a6d3f0f | 679 | if (tip->get_subbuf(tip, tip->device->buf_size) < 0) |
0cc7d25e | 680 | break; |
b7106311 JA |
681 | } |
682 | ||
7035d92d JA |
683 | /* |
684 | * trace is stopped, pull data until we get a short read | |
685 | */ | |
6a6d3f0f | 686 | while (tip->get_subbuf(tip, tip->device->buf_size) > 0) |
7035d92d JA |
687 | ; |
688 | ||
8e86c98a JA |
689 | tip_ftrunc_final(tip); |
690 | tip->exited = 1; | |
691 | return NULL; | |
692 | } | |
b7106311 | 693 | |
8e86c98a JA |
694 | static int write_data_net(int fd, void *buf, unsigned int buf_len) |
695 | { | |
696 | unsigned int bytes_left = buf_len; | |
697 | int ret; | |
b7106311 | 698 | |
8e86c98a JA |
699 | while (bytes_left) { |
700 | ret = send(fd, buf, bytes_left, 0); | |
701 | if (ret < 0) { | |
702 | perror("send"); | |
703 | return 1; | |
704 | } | |
705 | ||
706 | buf += ret; | |
707 | bytes_left -= ret; | |
9db17354 | 708 | } |
a3e4d330 | 709 | |
8e86c98a | 710 | return 0; |
a3e4d330 JA |
711 | } |
712 | ||
32f18c48 | 713 | static int net_send_header(struct thread_information *tip, unsigned int len) |
8e86c98a JA |
714 | { |
715 | struct blktrace_net_hdr hdr; | |
8e86c98a JA |
716 | |
717 | hdr.magic = BLK_IO_TRACE_MAGIC; | |
22cd0c02 | 718 | strcpy(hdr.buts_name, tip->device->buts_name); |
8e86c98a | 719 | hdr.cpu = tip->cpu; |
22cd0c02 | 720 | hdr.max_cpus = ncpus; |
32f18c48 | 721 | hdr.len = len; |
ff11d54c | 722 | hdr.cl_id = getpid(); |
6a6d3f0f TZ |
723 | hdr.buf_size = tip->device->buf_size; |
724 | hdr.buf_nr = tip->device->buf_nr; | |
725 | hdr.page_size = tip->device->page_size; | |
726 | ||
ff11d54c | 727 | return write_data_net(net_out_fd[tip->cpu], &hdr, sizeof(hdr)); |
32f18c48 | 728 | } |
8e86c98a | 729 | |
6a752c90 JA |
730 | /* |
731 | * send header with 0 length to signal end-of-run | |
732 | */ | |
733 | static void net_client_send_close(void) | |
734 | { | |
7934e668 | 735 | struct device_information *dip; |
6a752c90 | 736 | struct blktrace_net_hdr hdr; |
7934e668 | 737 | int i; |
6a752c90 | 738 | |
7934e668 | 739 | for_each_dip(dip, i) { |
7ab2f837 JA |
740 | hdr.magic = BLK_IO_TRACE_MAGIC; |
741 | hdr.max_cpus = ncpus; | |
742 | hdr.len = 0; | |
7934e668 | 743 | strcpy(hdr.buts_name, dip->buts_name); |
7ab2f837 | 744 | hdr.cpu = get_dropped_count(dip->buts_name); |
ff11d54c | 745 | hdr.cl_id = getpid(); |
6a6d3f0f TZ |
746 | hdr.buf_size = dip->buf_size; |
747 | hdr.buf_nr = dip->buf_nr; | |
748 | hdr.page_size = dip->page_size; | |
7ab2f837 | 749 | |
ff11d54c | 750 | write_data_net(net_out_fd[0], &hdr, sizeof(hdr)); |
7934e668 JA |
751 | } |
752 | ||
6a752c90 JA |
753 | } |
754 | ||
32f18c48 JA |
755 | static int flush_subbuf_net(struct thread_information *tip, |
756 | struct tip_subbuf *ts) | |
757 | { | |
758 | if (net_send_header(tip, ts->len)) | |
7934e668 | 759 | return -1; |
ff11d54c | 760 | if (write_data_net(net_out_fd[tip->cpu], ts->buf, ts->len)) |
7934e668 | 761 | return -1; |
8e86c98a | 762 | |
f0597a7e | 763 | free(ts->buf); |
8e86c98a | 764 | free(ts); |
7934e668 | 765 | return 1; |
8e86c98a JA |
766 | } |
767 | ||
f6fead25 JA |
768 | static int net_sendfile(struct thread_information *tip, struct tip_subbuf *ts) |
769 | { | |
ff11d54c | 770 | int ret = sendfile(net_out_fd[tip->cpu], tip->fd, NULL, ts->len); |
11629347 JA |
771 | |
772 | if (ret < 0) { | |
773 | perror("sendfile"); | |
774 | return 1; | |
775 | } else if (ret < (int) ts->len) { | |
776 | fprintf(stderr, "short sendfile send (%d of %d)\n", ret, ts->len); | |
777 | return 1; | |
778 | } | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
32f18c48 JA |
783 | static int flush_subbuf_sendfile(struct thread_information *tip, |
784 | struct tip_subbuf *ts) | |
785 | { | |
7934e668 | 786 | int ret = -1; |
18eed2a7 | 787 | |
f6fead25 | 788 | if (net_send_header(tip, ts->len)) |
11629347 | 789 | goto err; |
f6fead25 | 790 | if (net_sendfile(tip, ts)) |
11629347 | 791 | goto err; |
32f18c48 | 792 | |
f6fead25 | 793 | tip->data_read += ts->len; |
7934e668 | 794 | ret = 1; |
11629347 | 795 | err: |
32f18c48 | 796 | free(ts); |
11629347 | 797 | return ret; |
32f18c48 JA |
798 | } |
799 | ||
ff11d54c | 800 | static int get_subbuf_sendfile(struct thread_information *tip, |
d042efdf | 801 | __attribute__((__unused__)) unsigned int maxlen) |
ff11d54c TZ |
802 | { |
803 | struct tip_subbuf *ts; | |
804 | struct stat sb; | |
805 | unsigned int ready; | |
ff11d54c | 806 | |
2689be58 | 807 | wait_for_data(tip, -1); |
ff11d54c TZ |
808 | |
809 | if (fstat(tip->fd, &sb) < 0) { | |
810 | perror("trace stat"); | |
811 | return -1; | |
812 | } | |
4aeec019 | 813 | |
ff11d54c TZ |
814 | ready = sb.st_size - tip->data_queued; |
815 | if (!ready) { | |
816 | usleep(1000); | |
817 | return 0; | |
818 | } | |
819 | ||
820 | ts = malloc(sizeof(*ts)); | |
821 | ts->buf = NULL; | |
822 | ts->max_len = 0; | |
823 | ts->len = ready; | |
824 | tip->data_queued += ready; | |
825 | ||
d042efdf JA |
826 | if (flush_subbuf_sendfile(tip, ts) < 0) |
827 | return -1; | |
ff11d54c TZ |
828 | |
829 | return ready; | |
830 | } | |
831 | ||
8e86c98a JA |
832 | static int write_data(struct thread_information *tip, void *buf, |
833 | unsigned int buf_len) | |
8a43bac5 | 834 | { |
7126171a | 835 | int ret; |
8a43bac5 | 836 | |
6480258a JA |
837 | if (!buf_len) |
838 | return 0; | |
839 | ||
1452478f JA |
840 | ret = fwrite(buf, buf_len, 1, tip->ofile); |
841 | if (ferror(tip->ofile) || ret != 1) { | |
842 | perror("fwrite"); | |
843 | clearerr(tip->ofile); | |
844 | return 1; | |
d0ca268b JA |
845 | } |
846 | ||
9db17354 | 847 | if (tip->ofile_stdout) |
7126171a JA |
848 | fflush(tip->ofile); |
849 | ||
8a43bac5 JA |
850 | return 0; |
851 | } | |
852 | ||
8e86c98a JA |
853 | static int flush_subbuf_file(struct thread_information *tip, |
854 | struct tip_subbuf *ts) | |
8a43bac5 | 855 | { |
9db17354 JA |
856 | unsigned int offset = 0; |
857 | struct blk_io_trace *t; | |
858 | int pdu_len, events = 0; | |
8a43bac5 | 859 | |
9db17354 | 860 | /* |
7de86b12 | 861 | * surplus from last run |
9db17354 | 862 | */ |
7de86b12 AB |
863 | if (tip->leftover_ts) { |
864 | struct tip_subbuf *prev_ts = tip->leftover_ts; | |
865 | ||
9e8b753c | 866 | if (prev_ts->len + ts->len > prev_ts->max_len) { |
7de86b12 AB |
867 | prev_ts->max_len += ts->len; |
868 | prev_ts->buf = realloc(prev_ts->buf, prev_ts->max_len); | |
869 | } | |
870 | ||
9e8b753c | 871 | memcpy(prev_ts->buf + prev_ts->len, ts->buf, ts->len); |
7de86b12 AB |
872 | prev_ts->len += ts->len; |
873 | ||
874 | free(ts->buf); | |
875 | free(ts); | |
876 | ||
877 | ts = prev_ts; | |
878 | tip->leftover_ts = NULL; | |
9db17354 | 879 | } |
d0ca268b | 880 | |
9db17354 JA |
881 | while (offset + sizeof(*t) <= ts->len) { |
882 | t = ts->buf + offset; | |
3a9d6c13 | 883 | |
9cfa6c2b AB |
884 | if (verify_trace(t)) { |
885 | write_data(tip, ts->buf, offset); | |
9db17354 | 886 | return -1; |
9cfa6c2b | 887 | } |
3a9d6c13 | 888 | |
9db17354 | 889 | pdu_len = t->pdu_len; |
3a9d6c13 | 890 | |
9db17354 | 891 | if (offset + sizeof(*t) + pdu_len > ts->len) |
3a9d6c13 | 892 | break; |
4b5db44a | 893 | |
9db17354 JA |
894 | offset += sizeof(*t) + pdu_len; |
895 | tip->events_processed++; | |
b7106311 | 896 | tip->data_read += sizeof(*t) + pdu_len; |
9db17354 | 897 | events++; |
3a9d6c13 JA |
898 | } |
899 | ||
9cfa6c2b AB |
900 | if (write_data(tip, ts->buf, offset)) |
901 | return -1; | |
902 | ||
3a9d6c13 | 903 | /* |
9db17354 | 904 | * leftover bytes, save them for next time |
3a9d6c13 | 905 | */ |
9db17354 | 906 | if (offset != ts->len) { |
7de86b12 | 907 | tip->leftover_ts = ts; |
9e8b753c JA |
908 | ts->len -= offset; |
909 | memmove(ts->buf, ts->buf + offset, ts->len); | |
7de86b12 AB |
910 | } else { |
911 | free(ts->buf); | |
912 | free(ts); | |
9db17354 | 913 | } |
4b5db44a | 914 | |
9db17354 | 915 | return events; |
4b5db44a JA |
916 | } |
917 | ||
9db17354 | 918 | static int write_tip_events(struct thread_information *tip) |
d5396421 | 919 | { |
21f55651 | 920 | struct tip_subbuf *ts = subbuf_fifo_dequeue(tip); |
d5396421 | 921 | |
0cc7d25e JA |
922 | if (ts) |
923 | return tip->flush_subbuf(tip, ts); | |
91816d54 | 924 | |
9db17354 | 925 | return 0; |
91816d54 JA |
926 | } |
927 | ||
9db17354 JA |
928 | /* |
929 | * scans the tips we know and writes out the subbuffers we accumulate | |
930 | */ | |
931 | static void get_and_write_events(void) | |
d0ca268b | 932 | { |
9db17354 JA |
933 | struct device_information *dip; |
934 | struct thread_information *tip; | |
27223f19 | 935 | int i, j, events, ret, tips_running; |
d0ca268b | 936 | |
9db17354 JA |
937 | while (!is_done()) { |
938 | events = 0; | |
d0ca268b | 939 | |
9db17354 JA |
940 | for_each_dip(dip, i) { |
941 | for_each_tip(dip, tip, j) { | |
942 | ret = write_tip_events(tip); | |
943 | if (ret > 0) | |
944 | events += ret; | |
945 | } | |
946 | } | |
d0ca268b | 947 | |
9db17354 | 948 | if (!events) |
7934e668 | 949 | usleep(100000); |
d0ca268b JA |
950 | } |
951 | ||
a3e4d330 | 952 | /* |
9db17354 | 953 | * reap stored events |
a3e4d330 | 954 | */ |
9db17354 JA |
955 | do { |
956 | events = 0; | |
27223f19 | 957 | tips_running = 0; |
9db17354 JA |
958 | for_each_dip(dip, i) { |
959 | for_each_tip(dip, tip, j) { | |
960 | ret = write_tip_events(tip); | |
961 | if (ret > 0) | |
962 | events += ret; | |
27223f19 | 963 | tips_running += !tip->exited; |
9db17354 | 964 | } |
69e65a9e | 965 | } |
9db17354 | 966 | usleep(10); |
27223f19 | 967 | } while (events || tips_running); |
d0ca268b JA |
968 | } |
969 | ||
b7106311 JA |
970 | static void wait_for_threads(void) |
971 | { | |
972 | /* | |
8e86c98a JA |
973 | * for piped or network output, poll and fetch data for writeout. |
974 | * for files, we just wait around for trace threads to exit | |
b7106311 | 975 | */ |
8e86c98a | 976 | if ((output_name && !strcmp(output_name, "-")) || |
ff11d54c | 977 | ((net_mode == Net_client) && !net_use_sendfile)) |
b7106311 JA |
978 | get_and_write_events(); |
979 | else { | |
980 | struct device_information *dip; | |
981 | struct thread_information *tip; | |
982 | int i, j, tips_running; | |
983 | ||
984 | do { | |
985 | tips_running = 0; | |
7934e668 | 986 | usleep(100000); |
b7106311 JA |
987 | |
988 | for_each_dip(dip, i) | |
989 | for_each_tip(dip, tip, j) | |
990 | tips_running += !tip->exited; | |
991 | } while (tips_running); | |
992 | } | |
6a752c90 JA |
993 | |
994 | if (net_mode == Net_client) | |
995 | net_client_send_close(); | |
b7106311 JA |
996 | } |
997 | ||
97159c02 JA |
998 | static int fill_ofname(struct device_information *dip, |
999 | struct thread_information *tip, char *dst, | |
e3bf54d8 | 1000 | char *buts_name) |
8e86c98a | 1001 | { |
e3bf54d8 | 1002 | struct stat sb; |
8e86c98a JA |
1003 | int len = 0; |
1004 | ||
1005 | if (output_dir) | |
1006 | len = sprintf(dst, "%s/", output_dir); | |
dd870ef6 AB |
1007 | else |
1008 | len = sprintf(dst, "./"); | |
8e86c98a | 1009 | |
e3bf54d8 | 1010 | if (net_mode == Net_server) { |
ff11d54c | 1011 | struct net_connection *nc = tip->nc; |
e0a1988b | 1012 | |
ff11d54c TZ |
1013 | len += sprintf(dst + len, "%s-", inet_ntoa(nc->ch->cl_in_addr)); |
1014 | len += strftime(dst + len, 64, "%F-%T/", gmtime(&dip->cl_connect_time)); | |
e3bf54d8 JA |
1015 | } |
1016 | ||
1017 | if (stat(dst, &sb) < 0) { | |
1018 | if (errno != ENOENT) { | |
1019 | perror("stat"); | |
1020 | return 1; | |
1021 | } | |
1022 | if (mkdir(dst, 0755) < 0) { | |
1023 | perror(dst); | |
1024 | fprintf(stderr, "Can't make output dir\n"); | |
1025 | return 1; | |
1026 | } | |
1027 | } | |
1028 | ||
8e86c98a | 1029 | if (output_name) |
e3bf54d8 | 1030 | sprintf(dst + len, "%s.blktrace.%d", output_name, tip->cpu); |
8e86c98a | 1031 | else |
e3bf54d8 JA |
1032 | sprintf(dst + len, "%s.blktrace.%d", buts_name, tip->cpu); |
1033 | ||
1034 | return 0; | |
8e86c98a JA |
1035 | } |
1036 | ||
0cc7d25e JA |
1037 | static void fill_ops(struct thread_information *tip) |
1038 | { | |
1039 | /* | |
1040 | * setup ops | |
1041 | */ | |
32f18c48 | 1042 | if (net_mode == Net_client) { |
36808255 | 1043 | if (net_use_sendfile) { |
32f18c48 | 1044 | tip->get_subbuf = get_subbuf_sendfile; |
ff11d54c | 1045 | tip->flush_subbuf = NULL; |
32f18c48 JA |
1046 | } else { |
1047 | tip->get_subbuf = get_subbuf; | |
1048 | tip->flush_subbuf = flush_subbuf_net; | |
1049 | } | |
1050 | } else { | |
1051 | if (tip->ofile_mmap) | |
1052 | tip->get_subbuf = mmap_subbuf; | |
1053 | else | |
1054 | tip->get_subbuf = get_subbuf; | |
0cc7d25e | 1055 | |
0cc7d25e | 1056 | tip->flush_subbuf = flush_subbuf_file; |
32f18c48 JA |
1057 | } |
1058 | ||
0cc7d25e JA |
1059 | if (net_mode == Net_server) |
1060 | tip->read_data = read_data_net; | |
1061 | else | |
1062 | tip->read_data = read_data_file; | |
1063 | } | |
1064 | ||
ddf22842 JA |
1065 | static int tip_open_output(struct device_information *dip, |
1066 | struct thread_information *tip) | |
d0ca268b | 1067 | { |
ddf22842 | 1068 | int pipeline = output_name && !strcmp(output_name, "-"); |
8e86c98a | 1069 | int mode, vbuf_size; |
e3bf54d8 | 1070 | char op[128]; |
d0ca268b | 1071 | |
ddf22842 JA |
1072 | if (net_mode == Net_client) { |
1073 | tip->ofile = NULL; | |
1074 | tip->ofile_stdout = 0; | |
1075 | tip->ofile_mmap = 0; | |
0c0b75b4 | 1076 | goto done; |
ddf22842 JA |
1077 | } else if (pipeline) { |
1078 | tip->ofile = fdopen(STDOUT_FILENO, "w"); | |
1079 | tip->ofile_stdout = 1; | |
1080 | tip->ofile_mmap = 0; | |
1081 | mode = _IOLBF; | |
1082 | vbuf_size = 512; | |
1083 | } else { | |
97159c02 | 1084 | if (fill_ofname(dip, tip, op, dip->buts_name)) |
e3bf54d8 | 1085 | return 1; |
ddf22842 JA |
1086 | tip->ofile = fopen(op, "w+"); |
1087 | tip->ofile_stdout = 0; | |
1088 | tip->ofile_mmap = 1; | |
1089 | mode = _IOFBF; | |
1090 | vbuf_size = OFILE_BUF; | |
1091 | } | |
d5396421 | 1092 | |
0c0b75b4 | 1093 | if (tip->ofile == NULL) { |
ddf22842 JA |
1094 | perror(op); |
1095 | return 1; | |
1096 | } | |
d5396421 | 1097 | |
0c0b75b4 JA |
1098 | tip->ofile_buffer = malloc(vbuf_size); |
1099 | if (setvbuf(tip->ofile, tip->ofile_buffer, mode, vbuf_size)) { | |
1100 | perror("setvbuf"); | |
1101 | close_thread(tip); | |
1102 | return 1; | |
ddf22842 JA |
1103 | } |
1104 | ||
0c0b75b4 | 1105 | done: |
ddf22842 JA |
1106 | fill_ops(tip); |
1107 | return 0; | |
1108 | } | |
007c233c | 1109 | |
ddf22842 JA |
1110 | static int start_threads(struct device_information *dip) |
1111 | { | |
1112 | struct thread_information *tip; | |
1113 | int j; | |
1114 | ||
1115 | for_each_tip(dip, tip, j) { | |
1116 | tip->cpu = j; | |
1117 | tip->device = dip; | |
1118 | tip->events_processed = 0; | |
11eedd9b | 1119 | tip->fd = -1; |
ddf22842 JA |
1120 | memset(&tip->fifo, 0, sizeof(tip->fifo)); |
1121 | tip->leftover_ts = NULL; | |
1122 | ||
1123 | if (tip_open_output(dip, tip)) | |
1124 | return 1; | |
0cc7d25e | 1125 | |
9db17354 | 1126 | if (pthread_create(&tip->thread, NULL, thread_main, tip)) { |
e7c9f3ff | 1127 | perror("pthread_create"); |
007c233c | 1128 | close_thread(tip); |
e7c9f3ff | 1129 | return 1; |
d0ca268b JA |
1130 | } |
1131 | } | |
1132 | ||
e7c9f3ff | 1133 | return 0; |
d0ca268b JA |
1134 | } |
1135 | ||
e7c9f3ff | 1136 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 1137 | { |
e7c9f3ff | 1138 | struct thread_information *tip; |
91816d54 | 1139 | unsigned long ret; |
007c233c JA |
1140 | int i; |
1141 | ||
9db17354 | 1142 | for_each_tip(dip, tip, i) { |
91816d54 | 1143 | (void) pthread_join(tip->thread, (void *) &ret); |
9db17354 JA |
1144 | close_thread(tip); |
1145 | } | |
3aabcd89 JA |
1146 | } |
1147 | ||
e7c9f3ff | 1148 | static void stop_all_threads(void) |
72ca8801 | 1149 | { |
e7c9f3ff | 1150 | struct device_information *dip; |
72ca8801 NS |
1151 | int i; |
1152 | ||
99c1f5ab | 1153 | for_each_dip(dip, i) |
e7c9f3ff NS |
1154 | stop_threads(dip); |
1155 | } | |
1156 | ||
1157 | static void stop_all_tracing(void) | |
1158 | { | |
1159 | struct device_information *dip; | |
91816d54 | 1160 | int i; |
007c233c | 1161 | |
91816d54 | 1162 | for_each_dip(dip, i) |
e7c9f3ff | 1163 | stop_trace(dip); |
72ca8801 NS |
1164 | } |
1165 | ||
1166 | static void exit_trace(int status) | |
1167 | { | |
eb3c8108 JA |
1168 | if (!is_trace_stopped()) { |
1169 | trace_stopped = 1; | |
1170 | stop_all_threads(); | |
1171 | stop_all_tracing(); | |
1172 | } | |
1173 | ||
72ca8801 NS |
1174 | exit(status); |
1175 | } | |
1176 | ||
e7c9f3ff NS |
1177 | static int resize_devices(char *path) |
1178 | { | |
1179 | int size = (ndevs + 1) * sizeof(struct device_information); | |
1180 | ||
1181 | device_information = realloc(device_information, size); | |
1182 | if (!device_information) { | |
1183 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
1184 | return 1; | |
1185 | } | |
1186 | device_information[ndevs].path = path; | |
1187 | ndevs++; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static int open_devices(void) | |
d0ca268b | 1192 | { |
e7c9f3ff | 1193 | struct device_information *dip; |
d0ca268b | 1194 | int i; |
d0ca268b | 1195 | |
99c1f5ab | 1196 | for_each_dip(dip, i) { |
cf9208ea | 1197 | dip->fd = open(dip->path, O_RDONLY | O_NONBLOCK); |
e7c9f3ff NS |
1198 | if (dip->fd < 0) { |
1199 | perror(dip->path); | |
1200 | return 1; | |
1201 | } | |
6a6d3f0f TZ |
1202 | dip->buf_size = buf_size; |
1203 | dip->buf_nr = buf_nr; | |
1204 | dip->page_size = page_size; | |
e7c9f3ff | 1205 | } |
99c1f5ab | 1206 | |
e7c9f3ff NS |
1207 | return 0; |
1208 | } | |
1209 | ||
1210 | static int start_devices(void) | |
1211 | { | |
1212 | struct device_information *dip; | |
1213 | int i, j, size; | |
1214 | ||
1215 | size = ncpus * sizeof(struct thread_information); | |
1216 | thread_information = malloc(size * ndevs); | |
1217 | if (!thread_information) { | |
1218 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
1219 | return 1; | |
1220 | } | |
d5396421 | 1221 | |
99c1f5ab | 1222 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1223 | if (start_trace(dip)) { |
1224 | close(dip->fd); | |
1225 | fprintf(stderr, "Failed to start trace on %s\n", | |
1226 | dip->path); | |
1227 | break; | |
1228 | } | |
1229 | } | |
99c1f5ab | 1230 | |
e7c9f3ff | 1231 | if (i != ndevs) { |
ce020676 | 1232 | __for_each_dip(dip, device_information, i, j) |
e7c9f3ff | 1233 | stop_trace(dip); |
99c1f5ab | 1234 | |
e7c9f3ff NS |
1235 | return 1; |
1236 | } | |
1237 | ||
99c1f5ab | 1238 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1239 | dip->threads = thread_information + (i * ncpus); |
1240 | if (start_threads(dip)) { | |
1241 | fprintf(stderr, "Failed to start worker threads\n"); | |
1242 | break; | |
1243 | } | |
1244 | } | |
99c1f5ab | 1245 | |
e7c9f3ff | 1246 | if (i != ndevs) { |
ce020676 | 1247 | __for_each_dip(dip, device_information, i, j) |
e7c9f3ff | 1248 | stop_threads(dip); |
99c1f5ab | 1249 | for_each_dip(dip, i) |
e7c9f3ff | 1250 | stop_trace(dip); |
99c1f5ab | 1251 | |
e7c9f3ff | 1252 | return 1; |
d0ca268b JA |
1253 | } |
1254 | ||
e7c9f3ff | 1255 | return 0; |
d0ca268b JA |
1256 | } |
1257 | ||
e0a1988b | 1258 | static void show_stats(struct device_information *dips, int ndips, int cpus) |
e7c9f3ff | 1259 | { |
e7c9f3ff NS |
1260 | struct device_information *dip; |
1261 | struct thread_information *tip; | |
b7106311 | 1262 | unsigned long long events_processed, data_read; |
eb3c8108 | 1263 | unsigned long total_drops; |
2f903295 | 1264 | int i, j, no_stdout = 0; |
eb3c8108 JA |
1265 | |
1266 | if (is_stat_shown()) | |
1267 | return; | |
1268 | ||
2f903295 JA |
1269 | if (output_name && !strcmp(output_name, "-")) |
1270 | no_stdout = 1; | |
1271 | ||
eb3c8108 | 1272 | stat_shown = 1; |
428683db | 1273 | |
56070ea4 | 1274 | total_drops = 0; |
ce020676 | 1275 | __for_each_dip(dip, dips, ndips, i) { |
2f903295 | 1276 | if (!no_stdout) |
56070ea4 | 1277 | printf("Device: %s\n", dip->path); |
e7c9f3ff | 1278 | events_processed = 0; |
b7106311 | 1279 | data_read = 0; |
ce020676 | 1280 | __for_each_tip(dip, tip, cpus, j) { |
2f903295 | 1281 | if (!no_stdout) |
b7106311 JA |
1282 | printf(" CPU%3d: %20lu events, %8llu KiB data\n", |
1283 | tip->cpu, tip->events_processed, | |
54824c20 | 1284 | (tip->data_read + 1023) >> 10); |
e7c9f3ff | 1285 | events_processed += tip->events_processed; |
b7106311 | 1286 | data_read += tip->data_read; |
e7c9f3ff | 1287 | } |
eb3c8108 | 1288 | total_drops += dip->drop_count; |
2f903295 | 1289 | if (!no_stdout) |
b7106311 JA |
1290 | printf(" Total: %20llu events (dropped %lu), %8llu KiB data\n", |
1291 | events_processed, dip->drop_count, | |
18d8437d | 1292 | (data_read + 1023) >> 10); |
e7c9f3ff | 1293 | } |
56070ea4 JA |
1294 | |
1295 | if (total_drops) | |
1296 | fprintf(stderr, "You have dropped events, consider using a larger buffer size (-b)\n"); | |
e7c9f3ff | 1297 | } |
52724a0e | 1298 | |
e0a1988b | 1299 | static struct device_information *net_get_dip(struct net_connection *nc, |
6a6d3f0f | 1300 | struct blktrace_net_hdr *bnh) |
8e86c98a | 1301 | { |
ff11d54c TZ |
1302 | struct device_information *dip, *cl_dip = NULL; |
1303 | struct cl_host *ch = nc->ch; | |
8e86c98a JA |
1304 | int i; |
1305 | ||
ff11d54c TZ |
1306 | for (i = 0; i < ch->ndevs; i++) { |
1307 | dip = &ch->device_information[i]; | |
8e86c98a | 1308 | |
6a6d3f0f | 1309 | if (!strcmp(dip->buts_name, bnh->buts_name)) |
22cd0c02 | 1310 | return dip; |
ff11d54c | 1311 | |
6a6d3f0f | 1312 | if (dip->cl_id == bnh->cl_id) |
ff11d54c | 1313 | cl_dip = dip; |
8e86c98a JA |
1314 | } |
1315 | ||
ff11d54c TZ |
1316 | ch->device_information = realloc(ch->device_information, (ch->ndevs + 1) * sizeof(*dip)); |
1317 | dip = &ch->device_information[ch->ndevs]; | |
921b05fe JA |
1318 | memset(dip, 0, sizeof(*dip)); |
1319 | dip->fd = -1; | |
ff11d54c | 1320 | dip->ch = ch; |
6a6d3f0f TZ |
1321 | dip->cl_id = bnh->cl_id; |
1322 | dip->buf_size = bnh->buf_size; | |
1323 | dip->buf_nr = bnh->buf_nr; | |
1324 | dip->page_size = bnh->page_size; | |
1325 | ||
ff11d54c TZ |
1326 | if (cl_dip) |
1327 | dip->cl_connect_time = cl_dip->cl_connect_time; | |
1328 | else | |
1329 | dip->cl_connect_time = nc->connect_time; | |
6a6d3f0f TZ |
1330 | strcpy(dip->buts_name, bnh->buts_name); |
1331 | dip->path = strdup(bnh->buts_name); | |
7ab2f837 | 1332 | dip->trace_started = 1; |
ff11d54c | 1333 | ch->ndevs++; |
e0a1988b JA |
1334 | dip->threads = malloc(nc->ncpus * sizeof(struct thread_information)); |
1335 | memset(dip->threads, 0, nc->ncpus * sizeof(struct thread_information)); | |
22cd0c02 JA |
1336 | |
1337 | /* | |
1338 | * open all files | |
1339 | */ | |
e0a1988b | 1340 | for (i = 0; i < nc->ncpus; i++) { |
22cd0c02 | 1341 | struct thread_information *tip = &dip->threads[i]; |
8e86c98a | 1342 | |
22cd0c02 | 1343 | tip->cpu = i; |
22cd0c02 | 1344 | tip->device = dip; |
1366e53a | 1345 | tip->fd = -1; |
ff11d54c TZ |
1346 | tip->nc = nc; |
1347 | ||
ddf22842 | 1348 | if (tip_open_output(dip, tip)) |
22cd0c02 | 1349 | return NULL; |
ff11d54c TZ |
1350 | |
1351 | tip->nc = NULL; | |
8e86c98a JA |
1352 | } |
1353 | ||
22cd0c02 JA |
1354 | return dip; |
1355 | } | |
1356 | ||
e0a1988b JA |
1357 | static struct thread_information *net_get_tip(struct net_connection *nc, |
1358 | struct blktrace_net_hdr *bnh) | |
22cd0c02 JA |
1359 | { |
1360 | struct device_information *dip; | |
ff11d54c | 1361 | struct thread_information *tip; |
22cd0c02 | 1362 | |
6a6d3f0f | 1363 | dip = net_get_dip(nc, bnh); |
7ab2f837 JA |
1364 | if (!dip->trace_started) { |
1365 | fprintf(stderr, "Events for closed devices %s\n", dip->buts_name); | |
1366 | return NULL; | |
1367 | } | |
1368 | ||
ff11d54c TZ |
1369 | tip = &dip->threads[bnh->cpu]; |
1370 | if (!tip->nc) | |
1371 | tip->nc = nc; | |
1372 | ||
1373 | return tip; | |
8e86c98a JA |
1374 | } |
1375 | ||
e0a1988b JA |
1376 | static int net_get_header(struct net_connection *nc, |
1377 | struct blktrace_net_hdr *bnh) | |
8e86c98a | 1378 | { |
e0a1988b | 1379 | int fl = fcntl(nc->in_fd, F_GETFL); |
8e86c98a JA |
1380 | int bytes_left, ret; |
1381 | void *p = bnh; | |
1382 | ||
e0a1988b | 1383 | fcntl(nc->in_fd, F_SETFL, fl | O_NONBLOCK); |
8e86c98a JA |
1384 | bytes_left = sizeof(*bnh); |
1385 | while (bytes_left && !is_done()) { | |
e0a1988b | 1386 | ret = recv(nc->in_fd, p, bytes_left, MSG_WAITALL); |
8e86c98a JA |
1387 | if (ret < 0) { |
1388 | if (errno != EAGAIN) { | |
1389 | perror("recv header"); | |
1390 | return 1; | |
1391 | } | |
7934e668 | 1392 | usleep(1000); |
8e86c98a JA |
1393 | continue; |
1394 | } else if (!ret) { | |
7934e668 | 1395 | usleep(1000); |
8e86c98a JA |
1396 | continue; |
1397 | } else { | |
1398 | p += ret; | |
1399 | bytes_left -= ret; | |
1400 | } | |
1401 | } | |
e0a1988b | 1402 | fcntl(nc->in_fd, F_SETFL, fl & ~O_NONBLOCK); |
227f89ff | 1403 | return bytes_left; |
8e86c98a JA |
1404 | } |
1405 | ||
e0a1988b JA |
1406 | /* |
1407 | * finalize a net client: truncate files, show stats, cleanup, etc | |
1408 | */ | |
ff11d54c | 1409 | static void device_done(struct net_connection *nc, struct device_information *dip) |
e0a1988b | 1410 | { |
e0a1988b | 1411 | struct thread_information *tip; |
ff11d54c | 1412 | int i; |
e0a1988b | 1413 | |
ff11d54c TZ |
1414 | __for_each_tip(dip, tip, nc->ncpus, i) |
1415 | tip_ftrunc_final(tip); | |
e0a1988b | 1416 | |
ff11d54c | 1417 | show_stats(dip, 1, nc->ncpus); |
e0a1988b JA |
1418 | |
1419 | /* | |
1420 | * cleanup for next run | |
1421 | */ | |
ff11d54c TZ |
1422 | __for_each_tip(dip, tip, nc->ncpus, i) { |
1423 | if (tip->ofile) | |
1424 | fclose(tip->ofile); | |
e0a1988b JA |
1425 | } |
1426 | ||
ff11d54c TZ |
1427 | free(dip->threads); |
1428 | free(dip->path); | |
e0a1988b JA |
1429 | |
1430 | close(nc->in_fd); | |
1431 | nc->in_fd = -1; | |
1432 | ||
ff11d54c TZ |
1433 | stat_shown = 0; |
1434 | } | |
e0a1988b | 1435 | |
ff11d54c TZ |
1436 | static inline int in_addr_eq(struct in_addr a, struct in_addr b) |
1437 | { | |
1438 | return a.s_addr == b.s_addr; | |
1439 | } | |
1440 | ||
1441 | static void net_add_client_host(struct cl_host *ch) | |
1442 | { | |
1443 | ch->list_next = cl_host_list; | |
1444 | cl_host_list = ch; | |
1445 | cl_hosts++; | |
1446 | } | |
1447 | ||
1448 | static void net_remove_client_host(struct cl_host *ch) | |
1449 | { | |
1450 | struct cl_host *p, *c; | |
1451 | ||
1452 | for (p = c = cl_host_list; c; c = c->list_next) { | |
1453 | if (c == ch) { | |
1454 | if (p == c) | |
1455 | cl_host_list = c->list_next; | |
1456 | else | |
1457 | p->list_next = c->list_next; | |
1458 | cl_hosts--; | |
1459 | return; | |
1460 | } | |
1461 | p = c; | |
e0a1988b | 1462 | } |
ff11d54c | 1463 | } |
e0a1988b | 1464 | |
ff11d54c TZ |
1465 | static struct cl_host *net_find_client_host(struct in_addr cl_in_addr) |
1466 | { | |
1467 | struct cl_host *ch = cl_host_list; | |
1468 | ||
1469 | while (ch) { | |
1470 | if (in_addr_eq(ch->cl_in_addr, cl_in_addr)) | |
1471 | return ch; | |
1472 | ch = ch->list_next; | |
1473 | } | |
1474 | ||
1475 | return NULL; | |
1476 | } | |
1477 | ||
ff11d54c TZ |
1478 | static void net_client_host_done(struct cl_host *ch) |
1479 | { | |
1480 | free(ch->device_information); | |
1481 | free(ch->net_connections); | |
1482 | net_connects -= ch->nconn; | |
1483 | net_remove_client_host(ch); | |
1484 | free(ch); | |
e0a1988b JA |
1485 | } |
1486 | ||
1487 | /* | |
1488 | * handle incoming events from a net client | |
1489 | */ | |
1490 | static int net_client_data(struct net_connection *nc) | |
8e86c98a JA |
1491 | { |
1492 | struct thread_information *tip; | |
1493 | struct blktrace_net_hdr bnh; | |
1494 | ||
e0a1988b | 1495 | if (net_get_header(nc, &bnh)) |
8e86c98a JA |
1496 | return 1; |
1497 | ||
1498 | if (data_is_native == -1 && check_data_endianness(bnh.magic)) { | |
1499 | fprintf(stderr, "server: received data is bad\n"); | |
1500 | return 1; | |
1501 | } | |
1502 | ||
1503 | if (!data_is_native) { | |
227f89ff | 1504 | bnh.magic = be32_to_cpu(bnh.magic); |
8e86c98a | 1505 | bnh.cpu = be32_to_cpu(bnh.cpu); |
4aeec019 | 1506 | bnh.max_cpus = be32_to_cpu(bnh.max_cpus); |
8e86c98a | 1507 | bnh.len = be32_to_cpu(bnh.len); |
ff11d54c | 1508 | bnh.cl_id = be32_to_cpu(bnh.cl_id); |
6a6d3f0f TZ |
1509 | bnh.buf_size = be32_to_cpu(bnh.buf_size); |
1510 | bnh.buf_nr = be32_to_cpu(bnh.buf_nr); | |
1511 | bnh.page_size = be32_to_cpu(bnh.page_size); | |
8e86c98a JA |
1512 | } |
1513 | ||
227f89ff JA |
1514 | if ((bnh.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) { |
1515 | fprintf(stderr, "server: bad data magic\n"); | |
1516 | return 1; | |
1517 | } | |
1518 | ||
4aeec019 JA |
1519 | if (nc->ncpus == -1) |
1520 | nc->ncpus = bnh.max_cpus; | |
1521 | ||
6a752c90 JA |
1522 | /* |
1523 | * len == 0 means that the other end signalled end-of-run | |
1524 | */ | |
1525 | if (!bnh.len) { | |
7934e668 JA |
1526 | /* |
1527 | * overload cpu count with dropped events | |
1528 | */ | |
1529 | struct device_information *dip; | |
1530 | ||
6a6d3f0f | 1531 | dip = net_get_dip(nc, &bnh); |
7934e668 | 1532 | dip->drop_count = bnh.cpu; |
7ab2f837 | 1533 | dip->trace_started = 0; |
7934e668 | 1534 | |
e0a1988b | 1535 | printf("server: end of run for %s\n", dip->buts_name); |
4aeec019 | 1536 | |
ff11d54c TZ |
1537 | device_done(nc, dip); |
1538 | ||
1539 | if (++nc->ch->ndevs_done == nc->ch->ndevs) | |
1540 | net_client_host_done(nc->ch); | |
4aeec019 | 1541 | |
e0a1988b | 1542 | return 0; |
6a752c90 JA |
1543 | } |
1544 | ||
e0a1988b | 1545 | tip = net_get_tip(nc, &bnh); |
8e86c98a JA |
1546 | if (!tip) |
1547 | return 1; | |
1548 | ||
1549 | if (mmap_subbuf(tip, bnh.len)) | |
1550 | return 1; | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
e0a1988b | 1555 | static void net_add_connection(int listen_fd, struct sockaddr_in *addr) |
659bcc3f | 1556 | { |
e0a1988b JA |
1557 | socklen_t socklen = sizeof(*addr); |
1558 | struct net_connection *nc; | |
ff11d54c TZ |
1559 | struct cl_host *ch; |
1560 | int in_fd; | |
659bcc3f | 1561 | |
ff11d54c TZ |
1562 | in_fd = accept(listen_fd, (struct sockaddr *) addr, &socklen); |
1563 | if (in_fd < 0) { | |
1564 | perror("accept"); | |
e0a1988b | 1565 | return; |
659bcc3f | 1566 | } |
659bcc3f | 1567 | |
ff11d54c TZ |
1568 | ch = net_find_client_host(addr->sin_addr); |
1569 | if (!ch) { | |
1570 | if (cl_hosts == NET_MAX_CL_HOSTS) { | |
1571 | fprintf(stderr, "server: no more clients allowed\n"); | |
1572 | return; | |
1573 | } | |
1574 | ch = malloc(sizeof(struct cl_host)); | |
1575 | memset(ch, 0, sizeof(*ch)); | |
1576 | ch->cl_in_addr = addr->sin_addr; | |
1577 | net_add_client_host(ch); | |
506cdb6d JA |
1578 | |
1579 | printf("server: connection from %s\n", inet_ntoa(addr->sin_addr)); | |
659bcc3f JA |
1580 | } |
1581 | ||
ff11d54c TZ |
1582 | ch->net_connections = realloc(ch->net_connections, (ch->nconn + 1) * sizeof(*nc)); |
1583 | nc = &ch->net_connections[ch->nconn++]; | |
1584 | memset(nc, 0, sizeof(*nc)); | |
1585 | ||
e0a1988b | 1586 | time(&nc->connect_time); |
ff11d54c TZ |
1587 | nc->ch = ch; |
1588 | nc->in_fd = in_fd; | |
4aeec019 | 1589 | nc->ncpus = -1; |
e0a1988b JA |
1590 | net_connects++; |
1591 | } | |
1592 | ||
1593 | /* | |
1594 | * event driven loop, handle new incoming connections and data from | |
1595 | * existing connections | |
1596 | */ | |
1597 | static void net_server_handle_connections(int listen_fd, | |
1598 | struct sockaddr_in *addr) | |
1599 | { | |
ff11d54c TZ |
1600 | struct pollfd *pfds = NULL; |
1601 | struct net_connection **ncs = NULL; | |
1602 | int max_connects = 0; | |
1603 | int i, nconns, events; | |
1604 | struct cl_host *ch; | |
1605 | struct net_connection *nc; | |
1606 | ||
e0a1988b JA |
1607 | printf("server: waiting for connections...\n"); |
1608 | ||
1609 | while (!is_done()) { | |
ff11d54c TZ |
1610 | if (net_connects >= max_connects) { |
1611 | pfds = realloc(pfds, (net_connects + 1) * sizeof(*pfds)); | |
1612 | ncs = realloc(ncs, (net_connects + 1) * sizeof(*ncs)); | |
1613 | max_connects = net_connects + 1; | |
1614 | } | |
e0a1988b JA |
1615 | /* |
1616 | * the zero entry is for incoming connections, remaining | |
1617 | * entries for clients | |
1618 | */ | |
1619 | pfds[0].fd = listen_fd; | |
1620 | pfds[0].events = POLLIN; | |
ff11d54c TZ |
1621 | nconns = 0; |
1622 | for_each_cl_host(ch) { | |
1623 | for (i = 0; i < ch->nconn; i++) { | |
1624 | nc = &ch->net_connections[i]; | |
1625 | pfds[nconns + 1].fd = nc->in_fd; | |
1626 | pfds[nconns + 1].events = POLLIN; | |
1627 | ncs[nconns++] = nc; | |
1628 | } | |
e0a1988b JA |
1629 | } |
1630 | ||
ff11d54c | 1631 | events = poll(pfds, 1 + nconns, -1); |
e0a1988b JA |
1632 | if (events < 0) { |
1633 | if (errno == EINTR) | |
1634 | continue; | |
1635 | ||
1636 | perror("poll"); | |
1637 | break; | |
1638 | } else if (!events) | |
1639 | continue; | |
1640 | ||
1641 | if (pfds[0].revents & POLLIN) { | |
1642 | net_add_connection(listen_fd, addr); | |
1643 | events--; | |
1644 | } | |
1645 | ||
ff11d54c | 1646 | for (i = 0; events && i < nconns; i++) { |
e0a1988b | 1647 | if (pfds[i + 1].revents & POLLIN) { |
ff11d54c | 1648 | net_client_data(ncs[i]); |
e0a1988b JA |
1649 | events--; |
1650 | } | |
1651 | } | |
1652 | } | |
659bcc3f JA |
1653 | } |
1654 | ||
8e86c98a JA |
1655 | /* |
1656 | * Start here when we are in server mode - just fetch data from the network | |
1657 | * and dump to files | |
1658 | */ | |
1659 | static int net_server(void) | |
1660 | { | |
1661 | struct sockaddr_in addr; | |
e0a1988b | 1662 | int fd, opt; |
8e86c98a JA |
1663 | |
1664 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1665 | if (fd < 0) { | |
1666 | perror("server: socket"); | |
1667 | return 1; | |
1668 | } | |
1669 | ||
1670 | opt = 1; | |
1671 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { | |
1672 | perror("setsockopt"); | |
1673 | return 1; | |
1674 | } | |
1675 | ||
1676 | memset(&addr, 0, sizeof(addr)); | |
1677 | addr.sin_family = AF_INET; | |
1678 | addr.sin_addr.s_addr = htonl(INADDR_ANY); | |
1679 | addr.sin_port = htons(net_port); | |
1680 | ||
1681 | if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1682 | perror("bind"); | |
1683 | return 1; | |
1684 | } | |
1685 | ||
1686 | if (listen(fd, 1) < 0) { | |
1687 | perror("listen"); | |
1688 | return 1; | |
1689 | } | |
1690 | ||
e0a1988b JA |
1691 | net_server_handle_connections(fd, &addr); |
1692 | return 0; | |
8e86c98a JA |
1693 | } |
1694 | ||
1695 | /* | |
1696 | * Setup outgoing network connection where we will transmit data | |
1697 | */ | |
ff11d54c | 1698 | static int net_setup_client_cpu(int i, struct sockaddr_in *addr) |
8e86c98a | 1699 | { |
8e86c98a JA |
1700 | int fd; |
1701 | ||
1702 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1703 | if (fd < 0) { | |
1704 | perror("client: socket"); | |
1705 | return 1; | |
1706 | } | |
1707 | ||
ff11d54c TZ |
1708 | if (connect(fd, (struct sockaddr *) addr, sizeof(*addr)) < 0) { |
1709 | perror("client: connect"); | |
1710 | return 1; | |
1711 | } | |
1712 | ||
1713 | net_out_fd[i] = fd; | |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static int net_setup_client(void) | |
1718 | { | |
1719 | struct sockaddr_in addr; | |
1720 | int i; | |
1721 | ||
8e86c98a JA |
1722 | memset(&addr, 0, sizeof(addr)); |
1723 | addr.sin_family = AF_INET; | |
1724 | addr.sin_port = htons(net_port); | |
1725 | ||
1726 | if (inet_aton(hostname, &addr.sin_addr) != 1) { | |
1727 | struct hostent *hent = gethostbyname(hostname); | |
1728 | if (!hent) { | |
1729 | perror("gethostbyname"); | |
1730 | return 1; | |
1731 | } | |
1732 | ||
1733 | memcpy(&addr.sin_addr, hent->h_addr, 4); | |
1734 | strcpy(hostname, hent->h_name); | |
1735 | } | |
1736 | ||
1737 | printf("blktrace: connecting to %s\n", hostname); | |
1738 | ||
ff11d54c TZ |
1739 | net_out_fd = malloc(ncpus * sizeof(*net_out_fd)); |
1740 | for (i = 0; i < ncpus; i++) { | |
1741 | if (net_setup_client_cpu(i, &addr)) | |
1742 | return 1; | |
8e86c98a JA |
1743 | } |
1744 | ||
1745 | printf("blktrace: connected!\n"); | |
ff11d54c | 1746 | |
8e86c98a JA |
1747 | return 0; |
1748 | } | |
1749 | ||
52724a0e | 1750 | static char usage_str[] = \ |
3d06efea | 1751 | "-d <dev> [ -r debugfs path ] [ -o <output> ] [-k ] [ -w time ]\n" \ |
52724a0e JA |
1752 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ |
1753 | "\t-d Use specified device. May also be given last after options\n" \ | |
3d06efea | 1754 | "\t-r Path to mounted debugfs, defaults to /debug\n" \ |
52724a0e | 1755 | "\t-o File(s) to send output to\n" \ |
d1d7f15f | 1756 | "\t-D Directory to prepend to output file names\n" \ |
52724a0e JA |
1757 | "\t-k Kill a running trace\n" \ |
1758 | "\t-w Stop after defined time, in seconds\n" \ | |
1759 | "\t-a Only trace specified actions. See documentation\n" \ | |
1760 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
1761 | "\t-b Sub buffer size in KiB\n" \ |
1762 | "\t-n Number of sub buffers\n" \ | |
f531b94d JA |
1763 | "\t-l Run in network listen mode (blktrace server)\n" \ |
1764 | "\t-h Run in network client mode, connecting to the given host\n" \ | |
1765 | "\t-p Network port to use (default 8462)\n" \ | |
ff11d54c | 1766 | "\t-s Make the network client NOT use sendfile() to transfer data\n" \ |
f531b94d | 1767 | "\t-V Print program version info\n\n"; |
52724a0e | 1768 | |
ee1f4158 NS |
1769 | static void show_usage(char *program) |
1770 | { | |
52724a0e | 1771 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 | 1772 | } |
d0ca268b JA |
1773 | |
1774 | int main(int argc, char *argv[]) | |
1775 | { | |
c76adfc1 | 1776 | static char default_debugfs_path[] = "/sys/kernel/debug"; |
e3e74029 | 1777 | struct statfs st; |
d39c04ca | 1778 | int i, c; |
ece238a6 | 1779 | int stop_watch = 0; |
d39c04ca AB |
1780 | int act_mask_tmp = 0; |
1781 | ||
1782 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
1783 | switch (c) { | |
1784 | case 'a': | |
1785 | i = find_mask_map(optarg); | |
1786 | if (i < 0) { | |
ab197ca7 | 1787 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 1788 | optarg); |
7425d456 | 1789 | return 1; |
d39c04ca AB |
1790 | } |
1791 | act_mask_tmp |= i; | |
1792 | break; | |
1793 | ||
1794 | case 'A': | |
98f8386b AB |
1795 | if ((sscanf(optarg, "%x", &i) != 1) || |
1796 | !valid_act_opt(i)) { | |
d39c04ca | 1797 | fprintf(stderr, |
ab197ca7 | 1798 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 1799 | optarg, i); |
7425d456 | 1800 | return 1; |
d39c04ca AB |
1801 | } |
1802 | act_mask_tmp = i; | |
1803 | break; | |
d0ca268b | 1804 | |
d39c04ca | 1805 | case 'd': |
e7c9f3ff NS |
1806 | if (resize_devices(optarg) != 0) |
1807 | return 1; | |
d39c04ca AB |
1808 | break; |
1809 | ||
5270dddd | 1810 | case 'r': |
3d06efea | 1811 | debugfs_path = optarg; |
5270dddd JA |
1812 | break; |
1813 | ||
d5396421 | 1814 | case 'o': |
66efebf8 | 1815 | output_name = optarg; |
d5396421 | 1816 | break; |
bc39777c JA |
1817 | case 'k': |
1818 | kill_running_trace = 1; | |
1819 | break; | |
ece238a6 NS |
1820 | case 'w': |
1821 | stop_watch = atoi(optarg); | |
1822 | if (stop_watch <= 0) { | |
1823 | fprintf(stderr, | |
1824 | "Invalid stopwatch value (%d secs)\n", | |
1825 | stop_watch); | |
1826 | return 1; | |
1827 | } | |
1828 | break; | |
57ea8602 | 1829 | case 'V': |
52724a0e JA |
1830 | printf("%s version %s\n", argv[0], blktrace_version); |
1831 | return 0; | |
129aa440 | 1832 | case 'b': |
eb3c8108 | 1833 | buf_size = strtoul(optarg, NULL, 10); |
183a0855 | 1834 | if (buf_size <= 0 || buf_size > 16*1024) { |
129aa440 | 1835 | fprintf(stderr, |
eb3c8108 | 1836 | "Invalid buffer size (%lu)\n",buf_size); |
129aa440 JA |
1837 | return 1; |
1838 | } | |
1839 | buf_size <<= 10; | |
1840 | break; | |
1841 | case 'n': | |
eb3c8108 | 1842 | buf_nr = strtoul(optarg, NULL, 10); |
129aa440 JA |
1843 | if (buf_nr <= 0) { |
1844 | fprintf(stderr, | |
eb3c8108 | 1845 | "Invalid buffer nr (%lu)\n", buf_nr); |
129aa440 JA |
1846 | return 1; |
1847 | } | |
1848 | break; | |
d1d7f15f JA |
1849 | case 'D': |
1850 | output_dir = optarg; | |
1851 | break; | |
8e86c98a JA |
1852 | case 'h': |
1853 | net_mode = Net_client; | |
1854 | strcpy(hostname, optarg); | |
1855 | break; | |
1856 | case 'l': | |
1857 | net_mode = Net_server; | |
1858 | break; | |
1859 | case 'p': | |
1860 | net_port = atoi(optarg); | |
1861 | break; | |
32f18c48 | 1862 | case 's': |
79971f43 | 1863 | net_use_sendfile = 0; |
32f18c48 | 1864 | break; |
d39c04ca | 1865 | default: |
ee1f4158 | 1866 | show_usage(argv[0]); |
7425d456 | 1867 | return 1; |
d39c04ca AB |
1868 | } |
1869 | } | |
1870 | ||
8e86c98a JA |
1871 | setlocale(LC_NUMERIC, "en_US"); |
1872 | ||
1873 | page_size = getpagesize(); | |
1874 | ||
ec685dd2 JA |
1875 | if (net_mode == Net_server) { |
1876 | if (output_name) { | |
1877 | fprintf(stderr, "-o ignored in server mode\n"); | |
1878 | output_name = NULL; | |
1879 | } | |
1880 | ||
8e86c98a | 1881 | return net_server(); |
ec685dd2 | 1882 | } |
8e86c98a | 1883 | |
22cd0c02 JA |
1884 | while (optind < argc) { |
1885 | if (resize_devices(argv[optind++]) != 0) | |
1886 | return 1; | |
1887 | } | |
1888 | ||
e7c9f3ff | 1889 | if (ndevs == 0) { |
ee1f4158 | 1890 | show_usage(argv[0]); |
7425d456 | 1891 | return 1; |
d39c04ca AB |
1892 | } |
1893 | ||
d5396421 | 1894 | if (act_mask_tmp != 0) |
d39c04ca | 1895 | act_mask = act_mask_tmp; |
d0ca268b | 1896 | |
3d06efea JA |
1897 | if (!debugfs_path) |
1898 | debugfs_path = default_debugfs_path; | |
1899 | ||
1900 | if (statfs(debugfs_path, &st) < 0) { | |
e3e74029 NS |
1901 | perror("statfs"); |
1902 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
3d06efea | 1903 | debugfs_path); |
e3e74029 | 1904 | return 1; |
3d06efea JA |
1905 | } else if (st.f_type != (long) DEBUGFS_TYPE) { |
1906 | fprintf(stderr,"%s does not appear to be a debug filesystem\n", | |
1907 | debugfs_path); | |
7425d456 | 1908 | return 1; |
d0ca268b JA |
1909 | } |
1910 | ||
e7c9f3ff | 1911 | if (open_devices() != 0) |
7425d456 | 1912 | return 1; |
bc39777c JA |
1913 | |
1914 | if (kill_running_trace) { | |
e7c9f3ff | 1915 | stop_all_traces(); |
7425d456 | 1916 | return 0; |
bc39777c JA |
1917 | } |
1918 | ||
e7c9f3ff NS |
1919 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
1920 | if (ncpus < 0) { | |
1921 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 1922 | return 1; |
d0ca268b JA |
1923 | } |
1924 | ||
d0ca268b JA |
1925 | signal(SIGINT, handle_sigint); |
1926 | signal(SIGHUP, handle_sigint); | |
1927 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 1928 | signal(SIGALRM, handle_sigint); |
38e1f0c6 | 1929 | signal(SIGPIPE, SIG_IGN); |
d0ca268b | 1930 | |
8e86c98a JA |
1931 | if (net_mode == Net_client && net_setup_client()) |
1932 | return 1; | |
1933 | ||
1934 | if (start_devices() != 0) | |
1935 | return 1; | |
1936 | ||
e7c9f3ff | 1937 | atexit(stop_all_tracing); |
830fd65c | 1938 | |
ece238a6 NS |
1939 | if (stop_watch) |
1940 | alarm(stop_watch); | |
1941 | ||
b7106311 | 1942 | wait_for_threads(); |
d0ca268b | 1943 | |
eb3c8108 JA |
1944 | if (!is_trace_stopped()) { |
1945 | trace_stopped = 1; | |
91816d54 JA |
1946 | stop_all_threads(); |
1947 | stop_all_traces(); | |
91816d54 | 1948 | } |
d0ca268b | 1949 | |
e0a1988b | 1950 | show_stats(device_information, ndevs, ncpus); |
eb3c8108 | 1951 | |
d0ca268b JA |
1952 | return 0; |
1953 | } | |
1954 |