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 | |
a3225fed | 49 | static char blktrace_version[] = "0.99.1"; |
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 | ||
3d06efea | 60 | #define DEBUGFS_TYPE 0x64626720 |
e3e74029 | 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 | 148 | { |
79971f43 | 149 | .name = "no-sendfile", |
32f18c48 JA |
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; | |
9db17354 JA |
163 | }; |
164 | ||
21f55651 JA |
165 | #define FIFO_SIZE (1024) /* should be plenty big! */ |
166 | #define CL_SIZE (128) /* cache line, any bigger? */ | |
167 | ||
168 | struct tip_subbuf_fifo { | |
169 | int tail __attribute__((aligned(CL_SIZE))); | |
170 | int head __attribute__((aligned(CL_SIZE))); | |
171 | struct tip_subbuf *q[FIFO_SIZE]; | |
172 | }; | |
173 | ||
d0ca268b JA |
174 | struct thread_information { |
175 | int cpu; | |
176 | pthread_t thread; | |
b9d4294e JA |
177 | |
178 | int fd; | |
a3e4d330 | 179 | void *fd_buf; |
b9d4294e JA |
180 | char fn[MAXPATHLEN + 64]; |
181 | ||
007c233c JA |
182 | FILE *ofile; |
183 | char *ofile_buffer; | |
32f18c48 | 184 | off_t ofile_offset; |
9db17354 | 185 | int ofile_stdout; |
8e86c98a | 186 | int ofile_mmap; |
007c233c | 187 | |
0cc7d25e JA |
188 | int (*get_subbuf)(struct thread_information *, unsigned int); |
189 | int (*flush_subbuf)(struct thread_information *, struct tip_subbuf *); | |
190 | int (*read_data)(struct thread_information *, void *, unsigned int); | |
191 | ||
d0ca268b | 192 | unsigned long events_processed; |
b7106311 | 193 | unsigned long long data_read; |
bcbeb60f | 194 | unsigned long long data_queued; |
e7c9f3ff | 195 | struct device_information *device; |
9db17354 JA |
196 | |
197 | int exited; | |
198 | ||
b7106311 JA |
199 | /* |
200 | * piped fifo buffers | |
201 | */ | |
21f55651 | 202 | struct tip_subbuf_fifo fifo; |
7de86b12 | 203 | struct tip_subbuf *leftover_ts; |
b7106311 JA |
204 | |
205 | /* | |
206 | * mmap controlled output files | |
207 | */ | |
208 | unsigned long long fs_size; | |
209 | unsigned long long fs_max_size; | |
210 | unsigned long fs_off; | |
211 | void *fs_buf; | |
212 | unsigned long fs_buf_len; | |
ff11d54c TZ |
213 | |
214 | struct net_connection *nc; | |
d0ca268b JA |
215 | }; |
216 | ||
e7c9f3ff NS |
217 | struct device_information { |
218 | int fd; | |
219 | char *path; | |
220 | char buts_name[32]; | |
99c1f5ab | 221 | volatile int trace_started; |
eb3c8108 | 222 | unsigned long drop_count; |
e7c9f3ff | 223 | struct thread_information *threads; |
6a6d3f0f TZ |
224 | unsigned long buf_size; |
225 | unsigned long buf_nr; | |
226 | unsigned int page_size; | |
ff11d54c TZ |
227 | |
228 | struct cl_host *ch; | |
229 | u32 cl_id; | |
230 | time_t cl_connect_time; | |
e7c9f3ff | 231 | }; |
d0ca268b | 232 | |
e7c9f3ff | 233 | static int ncpus; |
d0ca268b | 234 | static struct thread_information *thread_information; |
e7c9f3ff NS |
235 | static int ndevs; |
236 | static struct device_information *device_information; | |
237 | ||
238 | /* command line option globals */ | |
3d06efea | 239 | static char *debugfs_path; |
d5396421 | 240 | static char *output_name; |
d1d7f15f | 241 | static char *output_dir; |
5c86134e | 242 | static int act_mask = ~0U; |
bc39777c | 243 | static int kill_running_trace; |
eb3c8108 JA |
244 | static unsigned long buf_size = BUF_SIZE; |
245 | static unsigned long buf_nr = BUF_NR; | |
b7106311 | 246 | static unsigned int page_size; |
d39c04ca | 247 | |
e7c9f3ff NS |
248 | #define is_done() (*(volatile int *)(&done)) |
249 | static volatile int done; | |
250 | ||
eb3c8108 JA |
251 | #define is_trace_stopped() (*(volatile int *)(&trace_stopped)) |
252 | static volatile int trace_stopped; | |
253 | ||
254 | #define is_stat_shown() (*(volatile int *)(&stat_shown)) | |
255 | static volatile int stat_shown; | |
a3e4d330 | 256 | |
8e86c98a JA |
257 | int data_is_native = -1; |
258 | ||
72ca8801 NS |
259 | static void exit_trace(int status); |
260 | ||
99c1f5ab JA |
261 | #define dip_tracing(dip) (*(volatile int *)(&(dip)->trace_started)) |
262 | #define dip_set_tracing(dip, v) ((dip)->trace_started = (v)) | |
263 | ||
ce020676 | 264 | #define __for_each_dip(__d, __di, __e, __i) \ |
e0a1988b JA |
265 | for (__i = 0, __d = __di; __i < __e; __i++, __d++) |
266 | ||
267 | #define for_each_dip(__d, __i) \ | |
ce020676 | 268 | __for_each_dip(__d, device_information, ndevs, __i) |
e0a1988b | 269 | #define for_each_nc_dip(__nc, __d, __i) \ |
ff11d54c | 270 | __for_each_dip(__d, (__nc)->ch->device_information, (__nc)->ch->ndevs, __i) |
99c1f5ab | 271 | |
ce020676 JA |
272 | #define __for_each_tip(__d, __t, __ncpus, __j) \ |
273 | for (__j = 0, __t = (__d)->threads; __j < __ncpus; __j++, __t++) | |
9db17354 | 274 | #define for_each_tip(__d, __t, __j) \ |
ce020676 | 275 | __for_each_tip(__d, __t, ncpus, __j) |
ff11d54c TZ |
276 | #define for_each_cl_host(__c) \ |
277 | for (__c = cl_host_list; __c; __c = __c->list_next) | |
99c1f5ab | 278 | |
8e86c98a JA |
279 | /* |
280 | * networking stuff follows. we include a magic number so we know whether | |
281 | * to endianness convert or not | |
282 | */ | |
283 | struct blktrace_net_hdr { | |
284 | u32 magic; /* same as trace magic */ | |
22cd0c02 | 285 | char buts_name[32]; /* trace name */ |
8e86c98a | 286 | u32 cpu; /* for which cpu */ |
22cd0c02 | 287 | u32 max_cpus; |
8e86c98a | 288 | u32 len; /* length of following trace data */ |
ff11d54c | 289 | u32 cl_id; /* id for set of client per-cpu connections */ |
6a6d3f0f TZ |
290 | u32 buf_size; /* client buf_size for this trace */ |
291 | u32 buf_nr; /* client buf_nr for this trace */ | |
292 | u32 page_size; /* client page_size for this trace */ | |
8e86c98a JA |
293 | }; |
294 | ||
295 | #define TRACE_NET_PORT (8462) | |
296 | ||
297 | enum { | |
298 | Net_none = 0, | |
299 | Net_server, | |
300 | Net_client, | |
301 | }; | |
302 | ||
303 | /* | |
304 | * network cmd line params | |
305 | */ | |
306 | static char hostname[MAXHOSTNAMELEN]; | |
307 | static int net_port = TRACE_NET_PORT; | |
308 | static int net_mode = 0; | |
79971f43 | 309 | static int net_use_sendfile = 1; |
8e86c98a | 310 | |
ff11d54c TZ |
311 | struct cl_host { |
312 | struct cl_host *list_next; | |
e0a1988b | 313 | struct in_addr cl_in_addr; |
ff11d54c TZ |
314 | struct net_connection *net_connections; |
315 | int nconn; | |
e0a1988b JA |
316 | struct device_information *device_information; |
317 | int ndevs; | |
318 | int ncpus; | |
ff11d54c | 319 | int ndevs_done; |
e0a1988b JA |
320 | }; |
321 | ||
ff11d54c TZ |
322 | struct net_connection { |
323 | int in_fd; | |
324 | struct pollfd pfd; | |
325 | time_t connect_time; | |
326 | struct cl_host *ch; | |
327 | int ncpus; | |
328 | }; | |
329 | ||
330 | #define NET_MAX_CL_HOSTS (1024) | |
331 | static struct cl_host *cl_host_list; | |
332 | static int cl_hosts; | |
e0a1988b | 333 | static int net_connects; |
ff11d54c TZ |
334 | |
335 | static int *net_out_fd; | |
8e86c98a JA |
336 | |
337 | static void handle_sigint(__attribute__((__unused__)) int sig) | |
338 | { | |
7035d92d JA |
339 | struct device_information *dip; |
340 | int i; | |
341 | ||
342 | /* | |
343 | * stop trace so we can reap currently produced data | |
344 | */ | |
345 | for_each_dip(dip, i) { | |
921b05fe JA |
346 | if (dip->fd == -1) |
347 | continue; | |
7035d92d JA |
348 | if (ioctl(dip->fd, BLKTRACESTOP) < 0) |
349 | perror("BLKTRACESTOP"); | |
350 | } | |
351 | ||
8e86c98a JA |
352 | done = 1; |
353 | } | |
354 | ||
eb3c8108 JA |
355 | static int get_dropped_count(const char *buts_name) |
356 | { | |
357 | int fd; | |
358 | char tmp[MAXPATHLEN + 64]; | |
359 | ||
360 | snprintf(tmp, sizeof(tmp), "%s/block/%s/dropped", | |
3d06efea | 361 | debugfs_path, buts_name); |
eb3c8108 JA |
362 | |
363 | fd = open(tmp, O_RDONLY); | |
364 | if (fd < 0) { | |
365 | /* | |
366 | * this may be ok, if the kernel doesn't support dropped counts | |
367 | */ | |
368 | if (errno == ENOENT) | |
369 | return 0; | |
370 | ||
371 | fprintf(stderr, "Couldn't open dropped file %s\n", tmp); | |
372 | return -1; | |
373 | } | |
374 | ||
375 | if (read(fd, tmp, sizeof(tmp)) < 0) { | |
376 | perror(tmp); | |
377 | close(fd); | |
378 | return -1; | |
379 | } | |
380 | ||
381 | close(fd); | |
382 | ||
383 | return atoi(tmp); | |
384 | } | |
385 | ||
e7c9f3ff | 386 | static int start_trace(struct device_information *dip) |
d0ca268b JA |
387 | { |
388 | struct blk_user_trace_setup buts; | |
389 | ||
1f79c4a0 | 390 | memset(&buts, 0, sizeof(buts)); |
6a6d3f0f TZ |
391 | buts.buf_size = dip->buf_size; |
392 | buts.buf_nr = dip->buf_nr; | |
d39c04ca | 393 | buts.act_mask = act_mask; |
d0ca268b | 394 | |
ed71a31e JA |
395 | if (ioctl(dip->fd, BLKTRACESETUP, &buts) < 0) { |
396 | perror("BLKTRACESETUP"); | |
397 | return 1; | |
398 | } | |
399 | ||
400 | if (ioctl(dip->fd, BLKTRACESTART) < 0) { | |
401 | perror("BLKTRACESTART"); | |
d0ca268b JA |
402 | return 1; |
403 | } | |
404 | ||
e7c9f3ff | 405 | memcpy(dip->buts_name, buts.name, sizeof(dip->buts_name)); |
99c1f5ab | 406 | dip_set_tracing(dip, 1); |
d0ca268b JA |
407 | return 0; |
408 | } | |
409 | ||
e7c9f3ff | 410 | static void stop_trace(struct device_information *dip) |
d0ca268b | 411 | { |
99c1f5ab JA |
412 | if (dip_tracing(dip) || kill_running_trace) { |
413 | dip_set_tracing(dip, 0); | |
cf9208ea | 414 | |
7035d92d JA |
415 | /* |
416 | * should be stopped, just don't complain if it isn't | |
417 | */ | |
418 | ioctl(dip->fd, BLKTRACESTOP); | |
419 | ||
ed71a31e JA |
420 | if (ioctl(dip->fd, BLKTRACETEARDOWN) < 0) |
421 | perror("BLKTRACETEARDOWN"); | |
cf9208ea | 422 | |
e7c9f3ff | 423 | close(dip->fd); |
cf9208ea | 424 | dip->fd = -1; |
707b0914 | 425 | } |
d0ca268b JA |
426 | } |
427 | ||
e7c9f3ff NS |
428 | static void stop_all_traces(void) |
429 | { | |
430 | struct device_information *dip; | |
431 | int i; | |
432 | ||
eb3c8108 JA |
433 | for_each_dip(dip, i) { |
434 | dip->drop_count = get_dropped_count(dip->buts_name); | |
e7c9f3ff | 435 | stop_trace(dip); |
eb3c8108 | 436 | } |
e7c9f3ff NS |
437 | } |
438 | ||
ff11d54c | 439 | static void wait_for_data(struct thread_information *tip, int timeout) |
eb3c8108 | 440 | { |
ff11d54c | 441 | struct pollfd pfd = { .fd = tip->fd, .events = POLLIN }; |
eb3c8108 | 442 | |
ff11d54c TZ |
443 | while (!is_done()) { |
444 | if (poll(&pfd, 1, timeout) < 0) { | |
7934e668 JA |
445 | perror("poll"); |
446 | break; | |
447 | } | |
ff11d54c | 448 | if (pfd.revents & POLLIN) |
9db17354 JA |
449 | break; |
450 | if (tip->ofile_stdout) | |
451 | break; | |
ff11d54c | 452 | } |
eb3c8108 JA |
453 | } |
454 | ||
0cc7d25e JA |
455 | static int read_data_file(struct thread_information *tip, void *buf, |
456 | unsigned int len) | |
d0ca268b | 457 | { |
ae9f71b3 | 458 | int ret = 0; |
bbabf03a | 459 | |
9db17354 | 460 | do { |
ff11d54c | 461 | wait_for_data(tip, 100); |
ae9f71b3 | 462 | |
9db17354 JA |
463 | ret = read(tip->fd, buf, len); |
464 | if (!ret) | |
465 | continue; | |
466 | else if (ret > 0) | |
467 | return ret; | |
468 | else { | |
bbabf03a | 469 | if (errno != EAGAIN) { |
a3e4d330 JA |
470 | perror(tip->fn); |
471 | fprintf(stderr,"Thread %d failed read of %s\n", | |
472 | tip->cpu, tip->fn); | |
473 | break; | |
474 | } | |
9db17354 | 475 | continue; |
bbabf03a | 476 | } |
9db17354 | 477 | } while (!is_done()); |
8a43bac5 | 478 | |
bbabf03a | 479 | return ret; |
8e86c98a | 480 | |
8a43bac5 JA |
481 | } |
482 | ||
0cc7d25e JA |
483 | static int read_data_net(struct thread_information *tip, void *buf, |
484 | unsigned int len) | |
8e86c98a | 485 | { |
ff11d54c | 486 | struct net_connection *nc = tip->nc; |
8e86c98a JA |
487 | unsigned int bytes_left = len; |
488 | int ret = 0; | |
489 | ||
490 | do { | |
e0a1988b | 491 | ret = recv(nc->in_fd, buf, bytes_left, MSG_WAITALL); |
8e86c98a JA |
492 | |
493 | if (!ret) | |
494 | continue; | |
495 | else if (ret < 0) { | |
496 | if (errno != EAGAIN) { | |
497 | perror(tip->fn); | |
498 | fprintf(stderr, "server: failed read\n"); | |
499 | return 0; | |
500 | } | |
501 | continue; | |
502 | } else { | |
503 | buf += ret; | |
504 | bytes_left -= ret; | |
505 | } | |
506 | } while (!is_done() && bytes_left); | |
507 | ||
410d7c62 | 508 | return len - bytes_left; |
8e86c98a JA |
509 | } |
510 | ||
8e86c98a JA |
511 | static inline struct tip_subbuf * |
512 | subbuf_fifo_dequeue(struct thread_information *tip) | |
a3e4d330 | 513 | { |
21f55651 JA |
514 | const int head = tip->fifo.head; |
515 | const int next = (head + 1) & (FIFO_SIZE - 1); | |
516 | ||
517 | if (head != tip->fifo.tail) { | |
518 | struct tip_subbuf *ts = tip->fifo.q[head]; | |
519 | ||
520 | store_barrier(); | |
521 | tip->fifo.head = next; | |
522 | return ts; | |
523 | } | |
524 | ||
525 | return NULL; | |
9db17354 | 526 | } |
eb3c8108 | 527 | |
21f55651 JA |
528 | static inline int subbuf_fifo_queue(struct thread_information *tip, |
529 | struct tip_subbuf *ts) | |
9db17354 | 530 | { |
21f55651 JA |
531 | const int tail = tip->fifo.tail; |
532 | const int next = (tail + 1) & (FIFO_SIZE - 1); | |
533 | ||
534 | if (next != tip->fifo.head) { | |
535 | tip->fifo.q[tail] = ts; | |
536 | store_barrier(); | |
537 | tip->fifo.tail = next; | |
538 | return 0; | |
539 | } | |
540 | ||
541 | fprintf(stderr, "fifo too small!\n"); | |
542 | return 1; | |
a3e4d330 JA |
543 | } |
544 | ||
b7106311 JA |
545 | /* |
546 | * For file output, truncate and mmap the file appropriately | |
547 | */ | |
8e86c98a | 548 | static int mmap_subbuf(struct thread_information *tip, unsigned int maxlen) |
b7106311 JA |
549 | { |
550 | int ofd = fileno(tip->ofile); | |
551 | int ret; | |
6a6d3f0f | 552 | unsigned long nr; |
b7106311 JA |
553 | |
554 | /* | |
555 | * extend file, if we have to. use chunks of 16 subbuffers. | |
556 | */ | |
6a6d3f0f | 557 | if (tip->fs_off + maxlen > tip->fs_buf_len) { |
b7106311 | 558 | if (tip->fs_buf) { |
5975d309 | 559 | munlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
560 | munmap(tip->fs_buf, tip->fs_buf_len); |
561 | tip->fs_buf = NULL; | |
562 | } | |
563 | ||
6a6d3f0f TZ |
564 | tip->fs_off = tip->fs_size & (tip->device->page_size - 1); |
565 | nr = max(16, tip->device->buf_nr); | |
566 | tip->fs_buf_len = (nr * tip->device->buf_size) - tip->fs_off; | |
b7106311 JA |
567 | tip->fs_max_size += tip->fs_buf_len; |
568 | ||
569 | if (ftruncate(ofd, tip->fs_max_size) < 0) { | |
570 | perror("ftruncate"); | |
571 | return -1; | |
572 | } | |
573 | ||
574 | tip->fs_buf = mmap(NULL, tip->fs_buf_len, PROT_WRITE, | |
575 | MAP_SHARED, ofd, tip->fs_size - tip->fs_off); | |
576 | if (tip->fs_buf == MAP_FAILED) { | |
577 | perror("mmap"); | |
578 | return -1; | |
579 | } | |
5975d309 | 580 | mlock(tip->fs_buf, tip->fs_buf_len); |
b7106311 JA |
581 | } |
582 | ||
7934e668 | 583 | ret = tip->read_data(tip, tip->fs_buf + tip->fs_off, maxlen); |
b7106311 | 584 | if (ret >= 0) { |
dbfbd6db | 585 | tip->data_read += ret; |
b7106311 JA |
586 | tip->fs_size += ret; |
587 | tip->fs_off += ret; | |
588 | return 0; | |
589 | } | |
590 | ||
591 | return -1; | |
592 | } | |
593 | ||
18eed2a7 JA |
594 | /* |
595 | * Use the copy approach for pipes and network | |
596 | */ | |
597 | static int get_subbuf(struct thread_information *tip, unsigned int maxlen) | |
598 | { | |
599 | struct tip_subbuf *ts = malloc(sizeof(*ts)); | |
600 | int ret; | |
601 | ||
6a6d3f0f | 602 | ts->buf = malloc(tip->device->buf_size); |
18eed2a7 JA |
603 | ts->max_len = maxlen; |
604 | ||
7934e668 | 605 | ret = tip->read_data(tip, ts->buf, ts->max_len); |
18eed2a7 JA |
606 | if (ret > 0) { |
607 | ts->len = ret; | |
dbfbd6db | 608 | tip->data_read += ret; |
7035d92d | 609 | if (subbuf_fifo_queue(tip, ts)) |
2f064793 JA |
610 | ret = -1; |
611 | } | |
612 | ||
613 | if (ret <= 0) { | |
614 | free(ts->buf); | |
615 | free(ts); | |
18eed2a7 JA |
616 | } |
617 | ||
618 | return ret; | |
619 | } | |
620 | ||
9db17354 | 621 | static void close_thread(struct thread_information *tip) |
a3e4d330 | 622 | { |
9db17354 JA |
623 | if (tip->fd != -1) |
624 | close(tip->fd); | |
625 | if (tip->ofile) | |
626 | fclose(tip->ofile); | |
627 | if (tip->ofile_buffer) | |
628 | free(tip->ofile_buffer); | |
629 | if (tip->fd_buf) | |
630 | free(tip->fd_buf); | |
1c99bc21 | 631 | |
9db17354 JA |
632 | tip->fd = -1; |
633 | tip->ofile = NULL; | |
634 | tip->ofile_buffer = NULL; | |
635 | tip->fd_buf = NULL; | |
a3e4d330 JA |
636 | } |
637 | ||
8e86c98a JA |
638 | static void tip_ftrunc_final(struct thread_information *tip) |
639 | { | |
640 | /* | |
641 | * truncate to right size and cleanup mmap | |
642 | */ | |
c196b5f2 | 643 | if (tip->ofile_mmap && tip->ofile) { |
8e86c98a JA |
644 | int ofd = fileno(tip->ofile); |
645 | ||
646 | if (tip->fs_buf) | |
647 | munmap(tip->fs_buf, tip->fs_buf_len); | |
648 | ||
649 | ftruncate(ofd, tip->fs_size); | |
650 | } | |
651 | } | |
652 | ||
9db17354 | 653 | static void *thread_main(void *arg) |
a3e4d330 | 654 | { |
9db17354 JA |
655 | struct thread_information *tip = arg; |
656 | pid_t pid = getpid(); | |
657 | cpu_set_t cpu_mask; | |
a3e4d330 | 658 | |
9db17354 JA |
659 | CPU_ZERO(&cpu_mask); |
660 | CPU_SET((tip->cpu), &cpu_mask); | |
a3e4d330 | 661 | |
9db17354 JA |
662 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) { |
663 | perror("sched_setaffinity"); | |
664 | exit_trace(1); | |
665 | } | |
a3e4d330 | 666 | |
9db17354 | 667 | snprintf(tip->fn, sizeof(tip->fn), "%s/block/%s/trace%d", |
3d06efea | 668 | debugfs_path, tip->device->buts_name, tip->cpu); |
9db17354 JA |
669 | tip->fd = open(tip->fn, O_RDONLY); |
670 | if (tip->fd < 0) { | |
671 | perror(tip->fn); | |
672 | fprintf(stderr,"Thread %d failed open of %s\n", tip->cpu, | |
673 | tip->fn); | |
674 | exit_trace(1); | |
a3e4d330 JA |
675 | } |
676 | ||
b7106311 | 677 | while (!is_done()) { |
6a6d3f0f | 678 | if (tip->get_subbuf(tip, tip->device->buf_size) < 0) |
0cc7d25e | 679 | break; |
b7106311 JA |
680 | } |
681 | ||
7035d92d JA |
682 | /* |
683 | * trace is stopped, pull data until we get a short read | |
684 | */ | |
6a6d3f0f | 685 | while (tip->get_subbuf(tip, tip->device->buf_size) > 0) |
7035d92d JA |
686 | ; |
687 | ||
8e86c98a JA |
688 | tip_ftrunc_final(tip); |
689 | tip->exited = 1; | |
690 | return NULL; | |
691 | } | |
b7106311 | 692 | |
8e86c98a JA |
693 | static int write_data_net(int fd, void *buf, unsigned int buf_len) |
694 | { | |
695 | unsigned int bytes_left = buf_len; | |
696 | int ret; | |
b7106311 | 697 | |
8e86c98a JA |
698 | while (bytes_left) { |
699 | ret = send(fd, buf, bytes_left, 0); | |
700 | if (ret < 0) { | |
701 | perror("send"); | |
702 | return 1; | |
703 | } | |
704 | ||
705 | buf += ret; | |
706 | bytes_left -= ret; | |
9db17354 | 707 | } |
a3e4d330 | 708 | |
8e86c98a | 709 | return 0; |
a3e4d330 JA |
710 | } |
711 | ||
32f18c48 | 712 | static int net_send_header(struct thread_information *tip, unsigned int len) |
8e86c98a JA |
713 | { |
714 | struct blktrace_net_hdr hdr; | |
8e86c98a JA |
715 | |
716 | hdr.magic = BLK_IO_TRACE_MAGIC; | |
22cd0c02 | 717 | strcpy(hdr.buts_name, tip->device->buts_name); |
8e86c98a | 718 | hdr.cpu = tip->cpu; |
22cd0c02 | 719 | hdr.max_cpus = ncpus; |
32f18c48 | 720 | hdr.len = len; |
ff11d54c | 721 | hdr.cl_id = getpid(); |
6a6d3f0f TZ |
722 | hdr.buf_size = tip->device->buf_size; |
723 | hdr.buf_nr = tip->device->buf_nr; | |
724 | hdr.page_size = tip->device->page_size; | |
725 | ||
ff11d54c | 726 | return write_data_net(net_out_fd[tip->cpu], &hdr, sizeof(hdr)); |
32f18c48 | 727 | } |
8e86c98a | 728 | |
6a752c90 JA |
729 | /* |
730 | * send header with 0 length to signal end-of-run | |
731 | */ | |
732 | static void net_client_send_close(void) | |
733 | { | |
7934e668 | 734 | struct device_information *dip; |
6a752c90 | 735 | struct blktrace_net_hdr hdr; |
7934e668 | 736 | int i; |
6a752c90 | 737 | |
7934e668 | 738 | for_each_dip(dip, i) { |
7ab2f837 JA |
739 | hdr.magic = BLK_IO_TRACE_MAGIC; |
740 | hdr.max_cpus = ncpus; | |
741 | hdr.len = 0; | |
7934e668 | 742 | strcpy(hdr.buts_name, dip->buts_name); |
7ab2f837 | 743 | hdr.cpu = get_dropped_count(dip->buts_name); |
ff11d54c | 744 | hdr.cl_id = getpid(); |
6a6d3f0f TZ |
745 | hdr.buf_size = dip->buf_size; |
746 | hdr.buf_nr = dip->buf_nr; | |
747 | hdr.page_size = dip->page_size; | |
7ab2f837 | 748 | |
ff11d54c | 749 | write_data_net(net_out_fd[0], &hdr, sizeof(hdr)); |
7934e668 JA |
750 | } |
751 | ||
6a752c90 JA |
752 | } |
753 | ||
32f18c48 JA |
754 | static int flush_subbuf_net(struct thread_information *tip, |
755 | struct tip_subbuf *ts) | |
756 | { | |
757 | if (net_send_header(tip, ts->len)) | |
7934e668 | 758 | return -1; |
ff11d54c | 759 | if (write_data_net(net_out_fd[tip->cpu], ts->buf, ts->len)) |
7934e668 | 760 | return -1; |
8e86c98a | 761 | |
f0597a7e | 762 | free(ts->buf); |
8e86c98a | 763 | free(ts); |
7934e668 | 764 | return 1; |
8e86c98a JA |
765 | } |
766 | ||
f6fead25 JA |
767 | static int net_sendfile(struct thread_information *tip, struct tip_subbuf *ts) |
768 | { | |
ff11d54c | 769 | int ret = sendfile(net_out_fd[tip->cpu], tip->fd, NULL, ts->len); |
11629347 JA |
770 | |
771 | if (ret < 0) { | |
772 | perror("sendfile"); | |
773 | return 1; | |
774 | } else if (ret < (int) ts->len) { | |
775 | fprintf(stderr, "short sendfile send (%d of %d)\n", ret, ts->len); | |
776 | return 1; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
32f18c48 JA |
782 | static int flush_subbuf_sendfile(struct thread_information *tip, |
783 | struct tip_subbuf *ts) | |
784 | { | |
7934e668 | 785 | int ret = -1; |
18eed2a7 | 786 | |
f6fead25 | 787 | if (net_send_header(tip, ts->len)) |
11629347 | 788 | goto err; |
f6fead25 | 789 | if (net_sendfile(tip, ts)) |
11629347 | 790 | goto err; |
32f18c48 | 791 | |
f6fead25 | 792 | tip->data_read += ts->len; |
7934e668 | 793 | ret = 1; |
11629347 | 794 | err: |
32f18c48 | 795 | free(ts); |
11629347 | 796 | return ret; |
32f18c48 JA |
797 | } |
798 | ||
ff11d54c | 799 | static int get_subbuf_sendfile(struct thread_information *tip, |
d042efdf | 800 | __attribute__((__unused__)) unsigned int maxlen) |
ff11d54c TZ |
801 | { |
802 | struct tip_subbuf *ts; | |
803 | struct stat sb; | |
804 | unsigned int ready; | |
ff11d54c | 805 | |
2689be58 | 806 | wait_for_data(tip, -1); |
ff11d54c TZ |
807 | |
808 | if (fstat(tip->fd, &sb) < 0) { | |
809 | perror("trace stat"); | |
810 | return -1; | |
811 | } | |
4aeec019 | 812 | |
ff11d54c TZ |
813 | ready = sb.st_size - tip->data_queued; |
814 | if (!ready) { | |
815 | usleep(1000); | |
816 | return 0; | |
817 | } | |
818 | ||
819 | ts = malloc(sizeof(*ts)); | |
820 | ts->buf = NULL; | |
821 | ts->max_len = 0; | |
822 | ts->len = ready; | |
823 | tip->data_queued += ready; | |
824 | ||
d042efdf JA |
825 | if (flush_subbuf_sendfile(tip, ts) < 0) |
826 | return -1; | |
ff11d54c TZ |
827 | |
828 | return ready; | |
829 | } | |
830 | ||
8e86c98a JA |
831 | static int write_data(struct thread_information *tip, void *buf, |
832 | unsigned int buf_len) | |
8a43bac5 | 833 | { |
7126171a | 834 | int ret; |
8a43bac5 | 835 | |
6480258a JA |
836 | if (!buf_len) |
837 | return 0; | |
838 | ||
1452478f JA |
839 | ret = fwrite(buf, buf_len, 1, tip->ofile); |
840 | if (ferror(tip->ofile) || ret != 1) { | |
841 | perror("fwrite"); | |
842 | clearerr(tip->ofile); | |
843 | return 1; | |
d0ca268b JA |
844 | } |
845 | ||
9db17354 | 846 | if (tip->ofile_stdout) |
7126171a JA |
847 | fflush(tip->ofile); |
848 | ||
8a43bac5 JA |
849 | return 0; |
850 | } | |
851 | ||
8e86c98a JA |
852 | static int flush_subbuf_file(struct thread_information *tip, |
853 | struct tip_subbuf *ts) | |
8a43bac5 | 854 | { |
9db17354 JA |
855 | unsigned int offset = 0; |
856 | struct blk_io_trace *t; | |
857 | int pdu_len, events = 0; | |
8a43bac5 | 858 | |
9db17354 | 859 | /* |
7de86b12 | 860 | * surplus from last run |
9db17354 | 861 | */ |
7de86b12 AB |
862 | if (tip->leftover_ts) { |
863 | struct tip_subbuf *prev_ts = tip->leftover_ts; | |
864 | ||
9e8b753c | 865 | if (prev_ts->len + ts->len > prev_ts->max_len) { |
7de86b12 AB |
866 | prev_ts->max_len += ts->len; |
867 | prev_ts->buf = realloc(prev_ts->buf, prev_ts->max_len); | |
868 | } | |
869 | ||
9e8b753c | 870 | memcpy(prev_ts->buf + prev_ts->len, ts->buf, ts->len); |
7de86b12 AB |
871 | prev_ts->len += ts->len; |
872 | ||
873 | free(ts->buf); | |
874 | free(ts); | |
875 | ||
876 | ts = prev_ts; | |
877 | tip->leftover_ts = NULL; | |
9db17354 | 878 | } |
d0ca268b | 879 | |
9db17354 JA |
880 | while (offset + sizeof(*t) <= ts->len) { |
881 | t = ts->buf + offset; | |
3a9d6c13 | 882 | |
9cfa6c2b AB |
883 | if (verify_trace(t)) { |
884 | write_data(tip, ts->buf, offset); | |
9db17354 | 885 | return -1; |
9cfa6c2b | 886 | } |
3a9d6c13 | 887 | |
9db17354 | 888 | pdu_len = t->pdu_len; |
3a9d6c13 | 889 | |
9db17354 | 890 | if (offset + sizeof(*t) + pdu_len > ts->len) |
3a9d6c13 | 891 | break; |
4b5db44a | 892 | |
9db17354 JA |
893 | offset += sizeof(*t) + pdu_len; |
894 | tip->events_processed++; | |
b7106311 | 895 | tip->data_read += sizeof(*t) + pdu_len; |
9db17354 | 896 | events++; |
3a9d6c13 JA |
897 | } |
898 | ||
9cfa6c2b AB |
899 | if (write_data(tip, ts->buf, offset)) |
900 | return -1; | |
901 | ||
3a9d6c13 | 902 | /* |
9db17354 | 903 | * leftover bytes, save them for next time |
3a9d6c13 | 904 | */ |
9db17354 | 905 | if (offset != ts->len) { |
7de86b12 | 906 | tip->leftover_ts = ts; |
9e8b753c JA |
907 | ts->len -= offset; |
908 | memmove(ts->buf, ts->buf + offset, ts->len); | |
7de86b12 AB |
909 | } else { |
910 | free(ts->buf); | |
911 | free(ts); | |
9db17354 | 912 | } |
4b5db44a | 913 | |
9db17354 | 914 | return events; |
4b5db44a JA |
915 | } |
916 | ||
9db17354 | 917 | static int write_tip_events(struct thread_information *tip) |
d5396421 | 918 | { |
21f55651 | 919 | struct tip_subbuf *ts = subbuf_fifo_dequeue(tip); |
d5396421 | 920 | |
0cc7d25e JA |
921 | if (ts) |
922 | return tip->flush_subbuf(tip, ts); | |
91816d54 | 923 | |
9db17354 | 924 | return 0; |
91816d54 JA |
925 | } |
926 | ||
9db17354 JA |
927 | /* |
928 | * scans the tips we know and writes out the subbuffers we accumulate | |
929 | */ | |
930 | static void get_and_write_events(void) | |
d0ca268b | 931 | { |
9db17354 JA |
932 | struct device_information *dip; |
933 | struct thread_information *tip; | |
27223f19 | 934 | int i, j, events, ret, tips_running; |
d0ca268b | 935 | |
9db17354 JA |
936 | while (!is_done()) { |
937 | events = 0; | |
d0ca268b | 938 | |
9db17354 JA |
939 | for_each_dip(dip, i) { |
940 | for_each_tip(dip, tip, j) { | |
941 | ret = write_tip_events(tip); | |
942 | if (ret > 0) | |
943 | events += ret; | |
944 | } | |
945 | } | |
d0ca268b | 946 | |
9db17354 | 947 | if (!events) |
7934e668 | 948 | usleep(100000); |
d0ca268b JA |
949 | } |
950 | ||
a3e4d330 | 951 | /* |
9db17354 | 952 | * reap stored events |
a3e4d330 | 953 | */ |
9db17354 JA |
954 | do { |
955 | events = 0; | |
27223f19 | 956 | tips_running = 0; |
9db17354 JA |
957 | for_each_dip(dip, i) { |
958 | for_each_tip(dip, tip, j) { | |
959 | ret = write_tip_events(tip); | |
960 | if (ret > 0) | |
961 | events += ret; | |
27223f19 | 962 | tips_running += !tip->exited; |
9db17354 | 963 | } |
69e65a9e | 964 | } |
9db17354 | 965 | usleep(10); |
27223f19 | 966 | } while (events || tips_running); |
d0ca268b JA |
967 | } |
968 | ||
b7106311 JA |
969 | static void wait_for_threads(void) |
970 | { | |
971 | /* | |
8e86c98a JA |
972 | * for piped or network output, poll and fetch data for writeout. |
973 | * for files, we just wait around for trace threads to exit | |
b7106311 | 974 | */ |
8e86c98a | 975 | if ((output_name && !strcmp(output_name, "-")) || |
ff11d54c | 976 | ((net_mode == Net_client) && !net_use_sendfile)) |
b7106311 JA |
977 | get_and_write_events(); |
978 | else { | |
979 | struct device_information *dip; | |
980 | struct thread_information *tip; | |
981 | int i, j, tips_running; | |
982 | ||
983 | do { | |
984 | tips_running = 0; | |
7934e668 | 985 | usleep(100000); |
b7106311 JA |
986 | |
987 | for_each_dip(dip, i) | |
988 | for_each_tip(dip, tip, j) | |
989 | tips_running += !tip->exited; | |
990 | } while (tips_running); | |
991 | } | |
6a752c90 JA |
992 | |
993 | if (net_mode == Net_client) | |
994 | net_client_send_close(); | |
b7106311 JA |
995 | } |
996 | ||
97159c02 JA |
997 | static int fill_ofname(struct device_information *dip, |
998 | struct thread_information *tip, char *dst, | |
e3bf54d8 | 999 | char *buts_name) |
8e86c98a | 1000 | { |
e3bf54d8 | 1001 | struct stat sb; |
8e86c98a JA |
1002 | int len = 0; |
1003 | ||
1004 | if (output_dir) | |
1005 | len = sprintf(dst, "%s/", output_dir); | |
dd870ef6 AB |
1006 | else |
1007 | len = sprintf(dst, "./"); | |
8e86c98a | 1008 | |
e3bf54d8 | 1009 | if (net_mode == Net_server) { |
ff11d54c | 1010 | struct net_connection *nc = tip->nc; |
e0a1988b | 1011 | |
ff11d54c TZ |
1012 | len += sprintf(dst + len, "%s-", inet_ntoa(nc->ch->cl_in_addr)); |
1013 | len += strftime(dst + len, 64, "%F-%T/", gmtime(&dip->cl_connect_time)); | |
e3bf54d8 JA |
1014 | } |
1015 | ||
1016 | if (stat(dst, &sb) < 0) { | |
1017 | if (errno != ENOENT) { | |
1018 | perror("stat"); | |
1019 | return 1; | |
1020 | } | |
1021 | if (mkdir(dst, 0755) < 0) { | |
1022 | perror(dst); | |
1023 | fprintf(stderr, "Can't make output dir\n"); | |
1024 | return 1; | |
1025 | } | |
1026 | } | |
1027 | ||
8e86c98a | 1028 | if (output_name) |
e3bf54d8 | 1029 | sprintf(dst + len, "%s.blktrace.%d", output_name, tip->cpu); |
8e86c98a | 1030 | else |
e3bf54d8 JA |
1031 | sprintf(dst + len, "%s.blktrace.%d", buts_name, tip->cpu); |
1032 | ||
1033 | return 0; | |
8e86c98a JA |
1034 | } |
1035 | ||
0cc7d25e JA |
1036 | static void fill_ops(struct thread_information *tip) |
1037 | { | |
1038 | /* | |
1039 | * setup ops | |
1040 | */ | |
32f18c48 | 1041 | if (net_mode == Net_client) { |
36808255 | 1042 | if (net_use_sendfile) { |
32f18c48 | 1043 | tip->get_subbuf = get_subbuf_sendfile; |
ff11d54c | 1044 | tip->flush_subbuf = NULL; |
32f18c48 JA |
1045 | } else { |
1046 | tip->get_subbuf = get_subbuf; | |
1047 | tip->flush_subbuf = flush_subbuf_net; | |
1048 | } | |
1049 | } else { | |
1050 | if (tip->ofile_mmap) | |
1051 | tip->get_subbuf = mmap_subbuf; | |
1052 | else | |
1053 | tip->get_subbuf = get_subbuf; | |
0cc7d25e | 1054 | |
0cc7d25e | 1055 | tip->flush_subbuf = flush_subbuf_file; |
32f18c48 JA |
1056 | } |
1057 | ||
0cc7d25e JA |
1058 | if (net_mode == Net_server) |
1059 | tip->read_data = read_data_net; | |
1060 | else | |
1061 | tip->read_data = read_data_file; | |
1062 | } | |
1063 | ||
ddf22842 JA |
1064 | static int tip_open_output(struct device_information *dip, |
1065 | struct thread_information *tip) | |
d0ca268b | 1066 | { |
ddf22842 | 1067 | int pipeline = output_name && !strcmp(output_name, "-"); |
8e86c98a | 1068 | int mode, vbuf_size; |
e3bf54d8 | 1069 | char op[128]; |
d0ca268b | 1070 | |
ddf22842 JA |
1071 | if (net_mode == Net_client) { |
1072 | tip->ofile = NULL; | |
1073 | tip->ofile_stdout = 0; | |
1074 | tip->ofile_mmap = 0; | |
0c0b75b4 | 1075 | goto done; |
ddf22842 JA |
1076 | } else if (pipeline) { |
1077 | tip->ofile = fdopen(STDOUT_FILENO, "w"); | |
1078 | tip->ofile_stdout = 1; | |
1079 | tip->ofile_mmap = 0; | |
1080 | mode = _IOLBF; | |
1081 | vbuf_size = 512; | |
1082 | } else { | |
97159c02 | 1083 | if (fill_ofname(dip, tip, op, dip->buts_name)) |
e3bf54d8 | 1084 | return 1; |
ddf22842 JA |
1085 | tip->ofile = fopen(op, "w+"); |
1086 | tip->ofile_stdout = 0; | |
1087 | tip->ofile_mmap = 1; | |
1088 | mode = _IOFBF; | |
1089 | vbuf_size = OFILE_BUF; | |
1090 | } | |
d5396421 | 1091 | |
0c0b75b4 | 1092 | if (tip->ofile == NULL) { |
ddf22842 JA |
1093 | perror(op); |
1094 | return 1; | |
1095 | } | |
d5396421 | 1096 | |
0c0b75b4 JA |
1097 | tip->ofile_buffer = malloc(vbuf_size); |
1098 | if (setvbuf(tip->ofile, tip->ofile_buffer, mode, vbuf_size)) { | |
1099 | perror("setvbuf"); | |
1100 | close_thread(tip); | |
1101 | return 1; | |
ddf22842 JA |
1102 | } |
1103 | ||
0c0b75b4 | 1104 | done: |
ddf22842 JA |
1105 | fill_ops(tip); |
1106 | return 0; | |
1107 | } | |
007c233c | 1108 | |
ddf22842 JA |
1109 | static int start_threads(struct device_information *dip) |
1110 | { | |
1111 | struct thread_information *tip; | |
1112 | int j; | |
1113 | ||
1114 | for_each_tip(dip, tip, j) { | |
1115 | tip->cpu = j; | |
1116 | tip->device = dip; | |
1117 | tip->events_processed = 0; | |
11eedd9b | 1118 | tip->fd = -1; |
ddf22842 JA |
1119 | memset(&tip->fifo, 0, sizeof(tip->fifo)); |
1120 | tip->leftover_ts = NULL; | |
1121 | ||
1122 | if (tip_open_output(dip, tip)) | |
1123 | return 1; | |
0cc7d25e | 1124 | |
9db17354 | 1125 | if (pthread_create(&tip->thread, NULL, thread_main, tip)) { |
e7c9f3ff | 1126 | perror("pthread_create"); |
007c233c | 1127 | close_thread(tip); |
e7c9f3ff | 1128 | return 1; |
d0ca268b JA |
1129 | } |
1130 | } | |
1131 | ||
e7c9f3ff | 1132 | return 0; |
d0ca268b JA |
1133 | } |
1134 | ||
e7c9f3ff | 1135 | static void stop_threads(struct device_information *dip) |
3aabcd89 | 1136 | { |
e7c9f3ff | 1137 | struct thread_information *tip; |
91816d54 | 1138 | unsigned long ret; |
007c233c JA |
1139 | int i; |
1140 | ||
9db17354 | 1141 | for_each_tip(dip, tip, i) { |
91816d54 | 1142 | (void) pthread_join(tip->thread, (void *) &ret); |
9db17354 JA |
1143 | close_thread(tip); |
1144 | } | |
3aabcd89 JA |
1145 | } |
1146 | ||
e7c9f3ff | 1147 | static void stop_all_threads(void) |
72ca8801 | 1148 | { |
e7c9f3ff | 1149 | struct device_information *dip; |
72ca8801 NS |
1150 | int i; |
1151 | ||
99c1f5ab | 1152 | for_each_dip(dip, i) |
e7c9f3ff NS |
1153 | stop_threads(dip); |
1154 | } | |
1155 | ||
1156 | static void stop_all_tracing(void) | |
1157 | { | |
1158 | struct device_information *dip; | |
91816d54 | 1159 | int i; |
007c233c | 1160 | |
91816d54 | 1161 | for_each_dip(dip, i) |
e7c9f3ff | 1162 | stop_trace(dip); |
72ca8801 NS |
1163 | } |
1164 | ||
1165 | static void exit_trace(int status) | |
1166 | { | |
eb3c8108 JA |
1167 | if (!is_trace_stopped()) { |
1168 | trace_stopped = 1; | |
1169 | stop_all_threads(); | |
1170 | stop_all_tracing(); | |
1171 | } | |
1172 | ||
72ca8801 NS |
1173 | exit(status); |
1174 | } | |
1175 | ||
e7c9f3ff NS |
1176 | static int resize_devices(char *path) |
1177 | { | |
1178 | int size = (ndevs + 1) * sizeof(struct device_information); | |
1179 | ||
1180 | device_information = realloc(device_information, size); | |
1181 | if (!device_information) { | |
1182 | fprintf(stderr, "Out of memory, device %s (%d)\n", path, size); | |
1183 | return 1; | |
1184 | } | |
1185 | device_information[ndevs].path = path; | |
1186 | ndevs++; | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static int open_devices(void) | |
d0ca268b | 1191 | { |
e7c9f3ff | 1192 | struct device_information *dip; |
d0ca268b | 1193 | int i; |
d0ca268b | 1194 | |
99c1f5ab | 1195 | for_each_dip(dip, i) { |
cf9208ea | 1196 | dip->fd = open(dip->path, O_RDONLY | O_NONBLOCK); |
e7c9f3ff NS |
1197 | if (dip->fd < 0) { |
1198 | perror(dip->path); | |
1199 | return 1; | |
1200 | } | |
6a6d3f0f TZ |
1201 | dip->buf_size = buf_size; |
1202 | dip->buf_nr = buf_nr; | |
1203 | dip->page_size = page_size; | |
e7c9f3ff | 1204 | } |
99c1f5ab | 1205 | |
e7c9f3ff NS |
1206 | return 0; |
1207 | } | |
1208 | ||
1209 | static int start_devices(void) | |
1210 | { | |
1211 | struct device_information *dip; | |
1212 | int i, j, size; | |
1213 | ||
1214 | size = ncpus * sizeof(struct thread_information); | |
1215 | thread_information = malloc(size * ndevs); | |
1216 | if (!thread_information) { | |
1217 | fprintf(stderr, "Out of memory, threads (%d)\n", size * ndevs); | |
1218 | return 1; | |
1219 | } | |
d5396421 | 1220 | |
99c1f5ab | 1221 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1222 | if (start_trace(dip)) { |
1223 | close(dip->fd); | |
1224 | fprintf(stderr, "Failed to start trace on %s\n", | |
1225 | dip->path); | |
1226 | break; | |
1227 | } | |
1228 | } | |
99c1f5ab | 1229 | |
e7c9f3ff | 1230 | if (i != ndevs) { |
ce020676 | 1231 | __for_each_dip(dip, device_information, i, j) |
e7c9f3ff | 1232 | stop_trace(dip); |
99c1f5ab | 1233 | |
e7c9f3ff NS |
1234 | return 1; |
1235 | } | |
1236 | ||
99c1f5ab | 1237 | for_each_dip(dip, i) { |
e7c9f3ff NS |
1238 | dip->threads = thread_information + (i * ncpus); |
1239 | if (start_threads(dip)) { | |
1240 | fprintf(stderr, "Failed to start worker threads\n"); | |
1241 | break; | |
1242 | } | |
1243 | } | |
99c1f5ab | 1244 | |
e7c9f3ff | 1245 | if (i != ndevs) { |
ce020676 | 1246 | __for_each_dip(dip, device_information, i, j) |
e7c9f3ff | 1247 | stop_threads(dip); |
99c1f5ab | 1248 | for_each_dip(dip, i) |
e7c9f3ff | 1249 | stop_trace(dip); |
99c1f5ab | 1250 | |
e7c9f3ff | 1251 | return 1; |
d0ca268b JA |
1252 | } |
1253 | ||
e7c9f3ff | 1254 | return 0; |
d0ca268b JA |
1255 | } |
1256 | ||
e0a1988b | 1257 | static void show_stats(struct device_information *dips, int ndips, int cpus) |
e7c9f3ff | 1258 | { |
e7c9f3ff NS |
1259 | struct device_information *dip; |
1260 | struct thread_information *tip; | |
b7106311 | 1261 | unsigned long long events_processed, data_read; |
eb3c8108 | 1262 | unsigned long total_drops; |
2f903295 | 1263 | int i, j, no_stdout = 0; |
eb3c8108 JA |
1264 | |
1265 | if (is_stat_shown()) | |
1266 | return; | |
1267 | ||
2f903295 JA |
1268 | if (output_name && !strcmp(output_name, "-")) |
1269 | no_stdout = 1; | |
1270 | ||
eb3c8108 | 1271 | stat_shown = 1; |
428683db | 1272 | |
56070ea4 | 1273 | total_drops = 0; |
ce020676 | 1274 | __for_each_dip(dip, dips, ndips, i) { |
2f903295 | 1275 | if (!no_stdout) |
56070ea4 | 1276 | printf("Device: %s\n", dip->path); |
e7c9f3ff | 1277 | events_processed = 0; |
b7106311 | 1278 | data_read = 0; |
ce020676 | 1279 | __for_each_tip(dip, tip, cpus, j) { |
2f903295 | 1280 | if (!no_stdout) |
b7106311 JA |
1281 | printf(" CPU%3d: %20lu events, %8llu KiB data\n", |
1282 | tip->cpu, tip->events_processed, | |
54824c20 | 1283 | (tip->data_read + 1023) >> 10); |
e7c9f3ff | 1284 | events_processed += tip->events_processed; |
b7106311 | 1285 | data_read += tip->data_read; |
e7c9f3ff | 1286 | } |
eb3c8108 | 1287 | total_drops += dip->drop_count; |
2f903295 | 1288 | if (!no_stdout) |
b7106311 JA |
1289 | printf(" Total: %20llu events (dropped %lu), %8llu KiB data\n", |
1290 | events_processed, dip->drop_count, | |
18d8437d | 1291 | (data_read + 1023) >> 10); |
e7c9f3ff | 1292 | } |
56070ea4 JA |
1293 | |
1294 | if (total_drops) | |
1295 | fprintf(stderr, "You have dropped events, consider using a larger buffer size (-b)\n"); | |
e7c9f3ff | 1296 | } |
52724a0e | 1297 | |
e0a1988b | 1298 | static struct device_information *net_get_dip(struct net_connection *nc, |
6a6d3f0f | 1299 | struct blktrace_net_hdr *bnh) |
8e86c98a | 1300 | { |
ff11d54c TZ |
1301 | struct device_information *dip, *cl_dip = NULL; |
1302 | struct cl_host *ch = nc->ch; | |
8e86c98a JA |
1303 | int i; |
1304 | ||
ff11d54c TZ |
1305 | for (i = 0; i < ch->ndevs; i++) { |
1306 | dip = &ch->device_information[i]; | |
8e86c98a | 1307 | |
6a6d3f0f | 1308 | if (!strcmp(dip->buts_name, bnh->buts_name)) |
22cd0c02 | 1309 | return dip; |
ff11d54c | 1310 | |
6a6d3f0f | 1311 | if (dip->cl_id == bnh->cl_id) |
ff11d54c | 1312 | cl_dip = dip; |
8e86c98a JA |
1313 | } |
1314 | ||
ff11d54c TZ |
1315 | ch->device_information = realloc(ch->device_information, (ch->ndevs + 1) * sizeof(*dip)); |
1316 | dip = &ch->device_information[ch->ndevs]; | |
921b05fe JA |
1317 | memset(dip, 0, sizeof(*dip)); |
1318 | dip->fd = -1; | |
ff11d54c | 1319 | dip->ch = ch; |
6a6d3f0f TZ |
1320 | dip->cl_id = bnh->cl_id; |
1321 | dip->buf_size = bnh->buf_size; | |
1322 | dip->buf_nr = bnh->buf_nr; | |
1323 | dip->page_size = bnh->page_size; | |
1324 | ||
ff11d54c TZ |
1325 | if (cl_dip) |
1326 | dip->cl_connect_time = cl_dip->cl_connect_time; | |
1327 | else | |
1328 | dip->cl_connect_time = nc->connect_time; | |
6a6d3f0f TZ |
1329 | strcpy(dip->buts_name, bnh->buts_name); |
1330 | dip->path = strdup(bnh->buts_name); | |
7ab2f837 | 1331 | dip->trace_started = 1; |
ff11d54c | 1332 | ch->ndevs++; |
e0a1988b JA |
1333 | dip->threads = malloc(nc->ncpus * sizeof(struct thread_information)); |
1334 | memset(dip->threads, 0, nc->ncpus * sizeof(struct thread_information)); | |
22cd0c02 JA |
1335 | |
1336 | /* | |
1337 | * open all files | |
1338 | */ | |
e0a1988b | 1339 | for (i = 0; i < nc->ncpus; i++) { |
22cd0c02 | 1340 | struct thread_information *tip = &dip->threads[i]; |
8e86c98a | 1341 | |
22cd0c02 | 1342 | tip->cpu = i; |
22cd0c02 | 1343 | tip->device = dip; |
1366e53a | 1344 | tip->fd = -1; |
ff11d54c TZ |
1345 | tip->nc = nc; |
1346 | ||
ddf22842 | 1347 | if (tip_open_output(dip, tip)) |
22cd0c02 | 1348 | return NULL; |
ff11d54c TZ |
1349 | |
1350 | tip->nc = NULL; | |
8e86c98a JA |
1351 | } |
1352 | ||
22cd0c02 JA |
1353 | return dip; |
1354 | } | |
1355 | ||
e0a1988b JA |
1356 | static struct thread_information *net_get_tip(struct net_connection *nc, |
1357 | struct blktrace_net_hdr *bnh) | |
22cd0c02 JA |
1358 | { |
1359 | struct device_information *dip; | |
ff11d54c | 1360 | struct thread_information *tip; |
22cd0c02 | 1361 | |
6a6d3f0f | 1362 | dip = net_get_dip(nc, bnh); |
7ab2f837 JA |
1363 | if (!dip->trace_started) { |
1364 | fprintf(stderr, "Events for closed devices %s\n", dip->buts_name); | |
1365 | return NULL; | |
1366 | } | |
1367 | ||
ff11d54c TZ |
1368 | tip = &dip->threads[bnh->cpu]; |
1369 | if (!tip->nc) | |
1370 | tip->nc = nc; | |
1371 | ||
1372 | return tip; | |
8e86c98a JA |
1373 | } |
1374 | ||
e0a1988b JA |
1375 | static int net_get_header(struct net_connection *nc, |
1376 | struct blktrace_net_hdr *bnh) | |
8e86c98a | 1377 | { |
e0a1988b | 1378 | int fl = fcntl(nc->in_fd, F_GETFL); |
8e86c98a JA |
1379 | int bytes_left, ret; |
1380 | void *p = bnh; | |
1381 | ||
e0a1988b | 1382 | fcntl(nc->in_fd, F_SETFL, fl | O_NONBLOCK); |
8e86c98a JA |
1383 | bytes_left = sizeof(*bnh); |
1384 | while (bytes_left && !is_done()) { | |
e0a1988b | 1385 | ret = recv(nc->in_fd, p, bytes_left, MSG_WAITALL); |
8e86c98a JA |
1386 | if (ret < 0) { |
1387 | if (errno != EAGAIN) { | |
1388 | perror("recv header"); | |
1389 | return 1; | |
1390 | } | |
7934e668 | 1391 | usleep(1000); |
8e86c98a JA |
1392 | continue; |
1393 | } else if (!ret) { | |
7934e668 | 1394 | usleep(1000); |
8e86c98a JA |
1395 | continue; |
1396 | } else { | |
1397 | p += ret; | |
1398 | bytes_left -= ret; | |
1399 | } | |
1400 | } | |
e0a1988b | 1401 | fcntl(nc->in_fd, F_SETFL, fl & ~O_NONBLOCK); |
227f89ff | 1402 | return bytes_left; |
8e86c98a JA |
1403 | } |
1404 | ||
e0a1988b JA |
1405 | /* |
1406 | * finalize a net client: truncate files, show stats, cleanup, etc | |
1407 | */ | |
ff11d54c | 1408 | static void device_done(struct net_connection *nc, struct device_information *dip) |
e0a1988b | 1409 | { |
e0a1988b | 1410 | struct thread_information *tip; |
ff11d54c | 1411 | int i; |
e0a1988b | 1412 | |
ff11d54c TZ |
1413 | __for_each_tip(dip, tip, nc->ncpus, i) |
1414 | tip_ftrunc_final(tip); | |
e0a1988b | 1415 | |
ff11d54c | 1416 | show_stats(dip, 1, nc->ncpus); |
e0a1988b JA |
1417 | |
1418 | /* | |
1419 | * cleanup for next run | |
1420 | */ | |
ff11d54c TZ |
1421 | __for_each_tip(dip, tip, nc->ncpus, i) { |
1422 | if (tip->ofile) | |
1423 | fclose(tip->ofile); | |
e0a1988b JA |
1424 | } |
1425 | ||
ff11d54c TZ |
1426 | free(dip->threads); |
1427 | free(dip->path); | |
e0a1988b JA |
1428 | |
1429 | close(nc->in_fd); | |
1430 | nc->in_fd = -1; | |
1431 | ||
ff11d54c TZ |
1432 | stat_shown = 0; |
1433 | } | |
e0a1988b | 1434 | |
ff11d54c TZ |
1435 | static inline int in_addr_eq(struct in_addr a, struct in_addr b) |
1436 | { | |
1437 | return a.s_addr == b.s_addr; | |
1438 | } | |
1439 | ||
1440 | static void net_add_client_host(struct cl_host *ch) | |
1441 | { | |
1442 | ch->list_next = cl_host_list; | |
1443 | cl_host_list = ch; | |
1444 | cl_hosts++; | |
1445 | } | |
1446 | ||
1447 | static void net_remove_client_host(struct cl_host *ch) | |
1448 | { | |
1449 | struct cl_host *p, *c; | |
1450 | ||
1451 | for (p = c = cl_host_list; c; c = c->list_next) { | |
1452 | if (c == ch) { | |
1453 | if (p == c) | |
1454 | cl_host_list = c->list_next; | |
1455 | else | |
1456 | p->list_next = c->list_next; | |
1457 | cl_hosts--; | |
1458 | return; | |
1459 | } | |
1460 | p = c; | |
e0a1988b | 1461 | } |
ff11d54c | 1462 | } |
e0a1988b | 1463 | |
ff11d54c TZ |
1464 | static struct cl_host *net_find_client_host(struct in_addr cl_in_addr) |
1465 | { | |
1466 | struct cl_host *ch = cl_host_list; | |
1467 | ||
1468 | while (ch) { | |
1469 | if (in_addr_eq(ch->cl_in_addr, cl_in_addr)) | |
1470 | return ch; | |
1471 | ch = ch->list_next; | |
1472 | } | |
1473 | ||
1474 | return NULL; | |
1475 | } | |
1476 | ||
ff11d54c TZ |
1477 | static void net_client_host_done(struct cl_host *ch) |
1478 | { | |
1479 | free(ch->device_information); | |
1480 | free(ch->net_connections); | |
1481 | net_connects -= ch->nconn; | |
1482 | net_remove_client_host(ch); | |
1483 | free(ch); | |
e0a1988b JA |
1484 | } |
1485 | ||
1486 | /* | |
1487 | * handle incoming events from a net client | |
1488 | */ | |
1489 | static int net_client_data(struct net_connection *nc) | |
8e86c98a JA |
1490 | { |
1491 | struct thread_information *tip; | |
1492 | struct blktrace_net_hdr bnh; | |
1493 | ||
e0a1988b | 1494 | if (net_get_header(nc, &bnh)) |
8e86c98a JA |
1495 | return 1; |
1496 | ||
1497 | if (data_is_native == -1 && check_data_endianness(bnh.magic)) { | |
1498 | fprintf(stderr, "server: received data is bad\n"); | |
1499 | return 1; | |
1500 | } | |
1501 | ||
1502 | if (!data_is_native) { | |
227f89ff | 1503 | bnh.magic = be32_to_cpu(bnh.magic); |
8e86c98a | 1504 | bnh.cpu = be32_to_cpu(bnh.cpu); |
4aeec019 | 1505 | bnh.max_cpus = be32_to_cpu(bnh.max_cpus); |
8e86c98a | 1506 | bnh.len = be32_to_cpu(bnh.len); |
ff11d54c | 1507 | bnh.cl_id = be32_to_cpu(bnh.cl_id); |
6a6d3f0f TZ |
1508 | bnh.buf_size = be32_to_cpu(bnh.buf_size); |
1509 | bnh.buf_nr = be32_to_cpu(bnh.buf_nr); | |
1510 | bnh.page_size = be32_to_cpu(bnh.page_size); | |
8e86c98a JA |
1511 | } |
1512 | ||
227f89ff JA |
1513 | if ((bnh.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) { |
1514 | fprintf(stderr, "server: bad data magic\n"); | |
1515 | return 1; | |
1516 | } | |
1517 | ||
4aeec019 JA |
1518 | if (nc->ncpus == -1) |
1519 | nc->ncpus = bnh.max_cpus; | |
1520 | ||
6a752c90 JA |
1521 | /* |
1522 | * len == 0 means that the other end signalled end-of-run | |
1523 | */ | |
1524 | if (!bnh.len) { | |
7934e668 JA |
1525 | /* |
1526 | * overload cpu count with dropped events | |
1527 | */ | |
1528 | struct device_information *dip; | |
1529 | ||
6a6d3f0f | 1530 | dip = net_get_dip(nc, &bnh); |
7934e668 | 1531 | dip->drop_count = bnh.cpu; |
7ab2f837 | 1532 | dip->trace_started = 0; |
7934e668 | 1533 | |
e0a1988b | 1534 | printf("server: end of run for %s\n", dip->buts_name); |
4aeec019 | 1535 | |
ff11d54c TZ |
1536 | device_done(nc, dip); |
1537 | ||
1538 | if (++nc->ch->ndevs_done == nc->ch->ndevs) | |
1539 | net_client_host_done(nc->ch); | |
4aeec019 | 1540 | |
e0a1988b | 1541 | return 0; |
6a752c90 JA |
1542 | } |
1543 | ||
e0a1988b | 1544 | tip = net_get_tip(nc, &bnh); |
8e86c98a JA |
1545 | if (!tip) |
1546 | return 1; | |
1547 | ||
1548 | if (mmap_subbuf(tip, bnh.len)) | |
1549 | return 1; | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
e0a1988b | 1554 | static void net_add_connection(int listen_fd, struct sockaddr_in *addr) |
659bcc3f | 1555 | { |
e0a1988b JA |
1556 | socklen_t socklen = sizeof(*addr); |
1557 | struct net_connection *nc; | |
ff11d54c TZ |
1558 | struct cl_host *ch; |
1559 | int in_fd; | |
659bcc3f | 1560 | |
ff11d54c TZ |
1561 | in_fd = accept(listen_fd, (struct sockaddr *) addr, &socklen); |
1562 | if (in_fd < 0) { | |
1563 | perror("accept"); | |
e0a1988b | 1564 | return; |
659bcc3f | 1565 | } |
659bcc3f | 1566 | |
ff11d54c TZ |
1567 | ch = net_find_client_host(addr->sin_addr); |
1568 | if (!ch) { | |
1569 | if (cl_hosts == NET_MAX_CL_HOSTS) { | |
1570 | fprintf(stderr, "server: no more clients allowed\n"); | |
1571 | return; | |
1572 | } | |
1573 | ch = malloc(sizeof(struct cl_host)); | |
1574 | memset(ch, 0, sizeof(*ch)); | |
1575 | ch->cl_in_addr = addr->sin_addr; | |
1576 | net_add_client_host(ch); | |
506cdb6d JA |
1577 | |
1578 | printf("server: connection from %s\n", inet_ntoa(addr->sin_addr)); | |
659bcc3f JA |
1579 | } |
1580 | ||
ff11d54c TZ |
1581 | ch->net_connections = realloc(ch->net_connections, (ch->nconn + 1) * sizeof(*nc)); |
1582 | nc = &ch->net_connections[ch->nconn++]; | |
1583 | memset(nc, 0, sizeof(*nc)); | |
1584 | ||
e0a1988b | 1585 | time(&nc->connect_time); |
ff11d54c TZ |
1586 | nc->ch = ch; |
1587 | nc->in_fd = in_fd; | |
4aeec019 | 1588 | nc->ncpus = -1; |
e0a1988b JA |
1589 | net_connects++; |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * event driven loop, handle new incoming connections and data from | |
1594 | * existing connections | |
1595 | */ | |
1596 | static void net_server_handle_connections(int listen_fd, | |
1597 | struct sockaddr_in *addr) | |
1598 | { | |
ff11d54c TZ |
1599 | struct pollfd *pfds = NULL; |
1600 | struct net_connection **ncs = NULL; | |
1601 | int max_connects = 0; | |
1602 | int i, nconns, events; | |
1603 | struct cl_host *ch; | |
1604 | struct net_connection *nc; | |
1605 | ||
e0a1988b JA |
1606 | printf("server: waiting for connections...\n"); |
1607 | ||
1608 | while (!is_done()) { | |
ff11d54c TZ |
1609 | if (net_connects >= max_connects) { |
1610 | pfds = realloc(pfds, (net_connects + 1) * sizeof(*pfds)); | |
1611 | ncs = realloc(ncs, (net_connects + 1) * sizeof(*ncs)); | |
1612 | max_connects = net_connects + 1; | |
1613 | } | |
e0a1988b JA |
1614 | /* |
1615 | * the zero entry is for incoming connections, remaining | |
1616 | * entries for clients | |
1617 | */ | |
1618 | pfds[0].fd = listen_fd; | |
1619 | pfds[0].events = POLLIN; | |
ff11d54c TZ |
1620 | nconns = 0; |
1621 | for_each_cl_host(ch) { | |
1622 | for (i = 0; i < ch->nconn; i++) { | |
1623 | nc = &ch->net_connections[i]; | |
1624 | pfds[nconns + 1].fd = nc->in_fd; | |
1625 | pfds[nconns + 1].events = POLLIN; | |
1626 | ncs[nconns++] = nc; | |
1627 | } | |
e0a1988b JA |
1628 | } |
1629 | ||
ff11d54c | 1630 | events = poll(pfds, 1 + nconns, -1); |
e0a1988b JA |
1631 | if (events < 0) { |
1632 | if (errno == EINTR) | |
1633 | continue; | |
1634 | ||
1635 | perror("poll"); | |
1636 | break; | |
1637 | } else if (!events) | |
1638 | continue; | |
1639 | ||
1640 | if (pfds[0].revents & POLLIN) { | |
1641 | net_add_connection(listen_fd, addr); | |
1642 | events--; | |
1643 | } | |
1644 | ||
ff11d54c | 1645 | for (i = 0; events && i < nconns; i++) { |
e0a1988b | 1646 | if (pfds[i + 1].revents & POLLIN) { |
ff11d54c | 1647 | net_client_data(ncs[i]); |
e0a1988b JA |
1648 | events--; |
1649 | } | |
1650 | } | |
1651 | } | |
659bcc3f JA |
1652 | } |
1653 | ||
8e86c98a JA |
1654 | /* |
1655 | * Start here when we are in server mode - just fetch data from the network | |
1656 | * and dump to files | |
1657 | */ | |
1658 | static int net_server(void) | |
1659 | { | |
1660 | struct sockaddr_in addr; | |
e0a1988b | 1661 | int fd, opt; |
8e86c98a JA |
1662 | |
1663 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1664 | if (fd < 0) { | |
1665 | perror("server: socket"); | |
1666 | return 1; | |
1667 | } | |
1668 | ||
1669 | opt = 1; | |
1670 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { | |
1671 | perror("setsockopt"); | |
1672 | return 1; | |
1673 | } | |
1674 | ||
1675 | memset(&addr, 0, sizeof(addr)); | |
1676 | addr.sin_family = AF_INET; | |
1677 | addr.sin_addr.s_addr = htonl(INADDR_ANY); | |
1678 | addr.sin_port = htons(net_port); | |
1679 | ||
1680 | if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { | |
1681 | perror("bind"); | |
1682 | return 1; | |
1683 | } | |
1684 | ||
1685 | if (listen(fd, 1) < 0) { | |
1686 | perror("listen"); | |
1687 | return 1; | |
1688 | } | |
1689 | ||
e0a1988b JA |
1690 | net_server_handle_connections(fd, &addr); |
1691 | return 0; | |
8e86c98a JA |
1692 | } |
1693 | ||
1694 | /* | |
1695 | * Setup outgoing network connection where we will transmit data | |
1696 | */ | |
ff11d54c | 1697 | static int net_setup_client_cpu(int i, struct sockaddr_in *addr) |
8e86c98a | 1698 | { |
8e86c98a JA |
1699 | int fd; |
1700 | ||
1701 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
1702 | if (fd < 0) { | |
1703 | perror("client: socket"); | |
1704 | return 1; | |
1705 | } | |
1706 | ||
ff11d54c TZ |
1707 | if (connect(fd, (struct sockaddr *) addr, sizeof(*addr)) < 0) { |
1708 | perror("client: connect"); | |
1709 | return 1; | |
1710 | } | |
1711 | ||
1712 | net_out_fd[i] = fd; | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int net_setup_client(void) | |
1717 | { | |
1718 | struct sockaddr_in addr; | |
1719 | int i; | |
1720 | ||
8e86c98a JA |
1721 | memset(&addr, 0, sizeof(addr)); |
1722 | addr.sin_family = AF_INET; | |
1723 | addr.sin_port = htons(net_port); | |
1724 | ||
1725 | if (inet_aton(hostname, &addr.sin_addr) != 1) { | |
1726 | struct hostent *hent = gethostbyname(hostname); | |
1727 | if (!hent) { | |
1728 | perror("gethostbyname"); | |
1729 | return 1; | |
1730 | } | |
1731 | ||
1732 | memcpy(&addr.sin_addr, hent->h_addr, 4); | |
1733 | strcpy(hostname, hent->h_name); | |
1734 | } | |
1735 | ||
1736 | printf("blktrace: connecting to %s\n", hostname); | |
1737 | ||
ff11d54c TZ |
1738 | net_out_fd = malloc(ncpus * sizeof(*net_out_fd)); |
1739 | for (i = 0; i < ncpus; i++) { | |
1740 | if (net_setup_client_cpu(i, &addr)) | |
1741 | return 1; | |
8e86c98a JA |
1742 | } |
1743 | ||
1744 | printf("blktrace: connected!\n"); | |
ff11d54c | 1745 | |
8e86c98a JA |
1746 | return 0; |
1747 | } | |
1748 | ||
52724a0e | 1749 | static char usage_str[] = \ |
3d06efea | 1750 | "-d <dev> [ -r debugfs path ] [ -o <output> ] [-k ] [ -w time ]\n" \ |
52724a0e JA |
1751 | "[ -a action ] [ -A action mask ] [ -v ]\n\n" \ |
1752 | "\t-d Use specified device. May also be given last after options\n" \ | |
3d06efea | 1753 | "\t-r Path to mounted debugfs, defaults to /debug\n" \ |
52724a0e | 1754 | "\t-o File(s) to send output to\n" \ |
d1d7f15f | 1755 | "\t-D Directory to prepend to output file names\n" \ |
52724a0e JA |
1756 | "\t-k Kill a running trace\n" \ |
1757 | "\t-w Stop after defined time, in seconds\n" \ | |
1758 | "\t-a Only trace specified actions. See documentation\n" \ | |
1759 | "\t-A Give trace mask as a single value. See documentation\n" \ | |
129aa440 JA |
1760 | "\t-b Sub buffer size in KiB\n" \ |
1761 | "\t-n Number of sub buffers\n" \ | |
f531b94d JA |
1762 | "\t-l Run in network listen mode (blktrace server)\n" \ |
1763 | "\t-h Run in network client mode, connecting to the given host\n" \ | |
1764 | "\t-p Network port to use (default 8462)\n" \ | |
ff11d54c | 1765 | "\t-s Make the network client NOT use sendfile() to transfer data\n" \ |
f531b94d | 1766 | "\t-V Print program version info\n\n"; |
52724a0e | 1767 | |
ee1f4158 NS |
1768 | static void show_usage(char *program) |
1769 | { | |
52724a0e | 1770 | fprintf(stderr, "Usage: %s %s %s",program, blktrace_version, usage_str); |
ee1f4158 | 1771 | } |
d0ca268b JA |
1772 | |
1773 | int main(int argc, char *argv[]) | |
1774 | { | |
3d06efea | 1775 | static char default_debugfs_path[] = "/debug"; |
e3e74029 | 1776 | struct statfs st; |
d39c04ca | 1777 | int i, c; |
ece238a6 | 1778 | int stop_watch = 0; |
d39c04ca AB |
1779 | int act_mask_tmp = 0; |
1780 | ||
1781 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) >= 0) { | |
1782 | switch (c) { | |
1783 | case 'a': | |
1784 | i = find_mask_map(optarg); | |
1785 | if (i < 0) { | |
ab197ca7 | 1786 | fprintf(stderr,"Invalid action mask %s\n", |
d39c04ca | 1787 | optarg); |
7425d456 | 1788 | return 1; |
d39c04ca AB |
1789 | } |
1790 | act_mask_tmp |= i; | |
1791 | break; | |
1792 | ||
1793 | case 'A': | |
98f8386b AB |
1794 | if ((sscanf(optarg, "%x", &i) != 1) || |
1795 | !valid_act_opt(i)) { | |
d39c04ca | 1796 | fprintf(stderr, |
ab197ca7 | 1797 | "Invalid set action mask %s/0x%x\n", |
d39c04ca | 1798 | optarg, i); |
7425d456 | 1799 | return 1; |
d39c04ca AB |
1800 | } |
1801 | act_mask_tmp = i; | |
1802 | break; | |
d0ca268b | 1803 | |
d39c04ca | 1804 | case 'd': |
e7c9f3ff NS |
1805 | if (resize_devices(optarg) != 0) |
1806 | return 1; | |
d39c04ca AB |
1807 | break; |
1808 | ||
5270dddd | 1809 | case 'r': |
3d06efea | 1810 | debugfs_path = optarg; |
5270dddd JA |
1811 | break; |
1812 | ||
d5396421 | 1813 | case 'o': |
66efebf8 | 1814 | output_name = optarg; |
d5396421 | 1815 | break; |
bc39777c JA |
1816 | case 'k': |
1817 | kill_running_trace = 1; | |
1818 | break; | |
ece238a6 NS |
1819 | case 'w': |
1820 | stop_watch = atoi(optarg); | |
1821 | if (stop_watch <= 0) { | |
1822 | fprintf(stderr, | |
1823 | "Invalid stopwatch value (%d secs)\n", | |
1824 | stop_watch); | |
1825 | return 1; | |
1826 | } | |
1827 | break; | |
57ea8602 | 1828 | case 'V': |
52724a0e JA |
1829 | printf("%s version %s\n", argv[0], blktrace_version); |
1830 | return 0; | |
129aa440 | 1831 | case 'b': |
eb3c8108 | 1832 | buf_size = strtoul(optarg, NULL, 10); |
183a0855 | 1833 | if (buf_size <= 0 || buf_size > 16*1024) { |
129aa440 | 1834 | fprintf(stderr, |
eb3c8108 | 1835 | "Invalid buffer size (%lu)\n",buf_size); |
129aa440 JA |
1836 | return 1; |
1837 | } | |
1838 | buf_size <<= 10; | |
1839 | break; | |
1840 | case 'n': | |
eb3c8108 | 1841 | buf_nr = strtoul(optarg, NULL, 10); |
129aa440 JA |
1842 | if (buf_nr <= 0) { |
1843 | fprintf(stderr, | |
eb3c8108 | 1844 | "Invalid buffer nr (%lu)\n", buf_nr); |
129aa440 JA |
1845 | return 1; |
1846 | } | |
1847 | break; | |
d1d7f15f JA |
1848 | case 'D': |
1849 | output_dir = optarg; | |
1850 | break; | |
8e86c98a JA |
1851 | case 'h': |
1852 | net_mode = Net_client; | |
1853 | strcpy(hostname, optarg); | |
1854 | break; | |
1855 | case 'l': | |
1856 | net_mode = Net_server; | |
1857 | break; | |
1858 | case 'p': | |
1859 | net_port = atoi(optarg); | |
1860 | break; | |
32f18c48 | 1861 | case 's': |
79971f43 | 1862 | net_use_sendfile = 0; |
32f18c48 | 1863 | break; |
d39c04ca | 1864 | default: |
ee1f4158 | 1865 | show_usage(argv[0]); |
7425d456 | 1866 | return 1; |
d39c04ca AB |
1867 | } |
1868 | } | |
1869 | ||
8e86c98a JA |
1870 | setlocale(LC_NUMERIC, "en_US"); |
1871 | ||
1872 | page_size = getpagesize(); | |
1873 | ||
1874 | if (net_mode == Net_server) | |
1875 | return net_server(); | |
1876 | ||
22cd0c02 JA |
1877 | while (optind < argc) { |
1878 | if (resize_devices(argv[optind++]) != 0) | |
1879 | return 1; | |
1880 | } | |
1881 | ||
e7c9f3ff | 1882 | if (ndevs == 0) { |
ee1f4158 | 1883 | show_usage(argv[0]); |
7425d456 | 1884 | return 1; |
d39c04ca AB |
1885 | } |
1886 | ||
d5396421 | 1887 | if (act_mask_tmp != 0) |
d39c04ca | 1888 | act_mask = act_mask_tmp; |
d0ca268b | 1889 | |
3d06efea JA |
1890 | if (!debugfs_path) |
1891 | debugfs_path = default_debugfs_path; | |
1892 | ||
1893 | if (statfs(debugfs_path, &st) < 0) { | |
e3e74029 NS |
1894 | perror("statfs"); |
1895 | fprintf(stderr,"%s does not appear to be a valid path\n", | |
3d06efea | 1896 | debugfs_path); |
e3e74029 | 1897 | return 1; |
3d06efea JA |
1898 | } else if (st.f_type != (long) DEBUGFS_TYPE) { |
1899 | fprintf(stderr,"%s does not appear to be a debug filesystem\n", | |
1900 | debugfs_path); | |
7425d456 | 1901 | return 1; |
d0ca268b JA |
1902 | } |
1903 | ||
e7c9f3ff | 1904 | if (open_devices() != 0) |
7425d456 | 1905 | return 1; |
bc39777c JA |
1906 | |
1907 | if (kill_running_trace) { | |
e7c9f3ff | 1908 | stop_all_traces(); |
7425d456 | 1909 | return 0; |
bc39777c JA |
1910 | } |
1911 | ||
e7c9f3ff NS |
1912 | ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
1913 | if (ncpus < 0) { | |
1914 | fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed\n"); | |
7425d456 | 1915 | return 1; |
d0ca268b JA |
1916 | } |
1917 | ||
d0ca268b JA |
1918 | signal(SIGINT, handle_sigint); |
1919 | signal(SIGHUP, handle_sigint); | |
1920 | signal(SIGTERM, handle_sigint); | |
ece238a6 | 1921 | signal(SIGALRM, handle_sigint); |
38e1f0c6 | 1922 | signal(SIGPIPE, SIG_IGN); |
d0ca268b | 1923 | |
8e86c98a JA |
1924 | if (net_mode == Net_client && net_setup_client()) |
1925 | return 1; | |
1926 | ||
1927 | if (start_devices() != 0) | |
1928 | return 1; | |
1929 | ||
e7c9f3ff | 1930 | atexit(stop_all_tracing); |
830fd65c | 1931 | |
ece238a6 NS |
1932 | if (stop_watch) |
1933 | alarm(stop_watch); | |
1934 | ||
b7106311 | 1935 | wait_for_threads(); |
d0ca268b | 1936 | |
eb3c8108 JA |
1937 | if (!is_trace_stopped()) { |
1938 | trace_stopped = 1; | |
91816d54 JA |
1939 | stop_all_threads(); |
1940 | stop_all_traces(); | |
91816d54 | 1941 | } |
d0ca268b | 1942 | |
e0a1988b | 1943 | show_stats(device_information, ndevs, ncpus); |
eb3c8108 | 1944 | |
d0ca268b JA |
1945 | return 0; |
1946 | } | |
1947 |