1 /*
2 * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 2.0 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 *
22 * File: fsx.c
23 * Author: Avadis Tevanian, Jr.
24 *
25 * File system exerciser.
26 *
27 * Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com
28 *
29 * Various features from Joe Sokol, Pat Dirks, and Clark Warner.
30 *
31 * Small changes to work under Linux -- davej@suse.de
32 *
33 * Sundry porting patches from Guy Harris 12/2001
34 *
35 * Checks for mmap last-page zero fill.
36 *
37 * Updated license to APSL 2.0, 2004/7/27 - Jordan Hubbard
38 *
39 */
40
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #ifdef _UWIN
44 # include <sys/param.h>
45 # include <limits.h>
46 # include <time.h>
47 # include <strings.h>
48 #endif
49 #include <err.h>
50 #include <fcntl.h>
51 #include <sys/mman.h>
52 #ifndef MAP_FILE
53 # define MAP_FILE 0
54 #endif
55 #include <limits.h>
56 #include <signal.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61 #include <stdarg.h>
62 #include <errno.h>
63
64 #define NUMPRINTCOLUMNS 32 /* # columns of data to print on each line */
65
66 /*
67 * A log entry is an operation and a bunch of arguments.
68 */
69
70 struct log_entry {
71 int operation;
72 int args[3];
73 };
74
75 #define LOGSIZE 1000
76
77 struct log_entry oplog[LOGSIZE]; /* the log */
78 int logptr = 0; /* current position in log */
79 int logcount = 0; /* total ops */
80
81 /*
82 * Define operations
83 */
84
85 #define OP_READ 1
86 #define OP_WRITE 2
87 #define OP_TRUNCATE 3
88 #define OP_CLOSEOPEN 4
89 #define OP_MAPREAD 5
90 #define OP_MAPWRITE 6
91 #define OP_SKIPPED 7
92 #define OP_INVALIDATE 8
93
94 int page_size;
95 int page_mask;
96
97 char *original_buf; /* a pointer to the original data */
98 char *good_buf; /* a pointer to the correct data */
99 char *temp_buf; /* a pointer to the current data */
100 char *fname; /* name of our test file */
101 int fd; /* fd for our test file */
102
103 off_t file_size = 0;
104 off_t biggest = 0;
105 char state[256];
106 long testcalls = 0; /* calls to function "test" */
107
108 long simulatedopcount = 0; /* -b flag */
109 int closeprob = 0; /* -c flag */
110 int invlprob = 0; /* -i flag */
111 int debug = 0; /* -d flag */
112 long debugstart = 0; /* -D flag */
113 off_t maxfilelen = 256 * 1024; /* -l flag */
114 int sizechecks = 1; /* -n flag disables them */
115 int maxoplen = 64 * 1024; /* -o flag */
116 int quiet = 0; /* -q flag */
117 unsigned long progressinterval = 0; /* -p flag */
118 int readbdy = 1; /* -r flag */
119 int style = 0; /* -s flag */
120 int truncbdy = 1; /* -t flag */
121 int writebdy = 1; /* -w flag */
122 long monitorstart = -1; /* -m flag */
123 long monitorend = -1; /* -m flag */
124 int lite = 0; /* -L flag */
125 long numops = -1; /* -N flag */
126 int randomoplen = 1; /* -O flag disables it */
127 int seed = 1; /* -S flag */
128 int mapped_writes = 1; /* -W flag disables */
129 int mapped_reads = 1; /* -R flag disables it */
130 int mapped_msync = 1; /* -U flag disables */
131 int fsxgoodfd = 0;
132 FILE * fsxlogf = NULL;
133 int badoff = -1;
134 int closeopen = 0;
135 int invl = 0;
136
137
138 void
prt(const char * fmt,...)139 prt(const char *fmt, ...)
140 {
141 va_list args;
142
143 va_start(args, fmt);
144 vfprintf(stdout, fmt, args);
145 va_end(args);
146
147 if (fsxlogf) {
148 va_start(args, fmt);
149 vfprintf(fsxlogf, fmt, args);
150 va_end(args);
151 }
152 }
153
154 void
prterr(const char * prefix)155 prterr(const char *prefix)
156 {
157 prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
158 }
159
160
161 void
do_log4(int operation,int arg0,int arg1,int arg2)162 do_log4(int operation, int arg0, int arg1, int arg2)
163 {
164 struct log_entry *le;
165
166 le = &oplog[logptr];
167 le->operation = operation;
168 le->args[0] = arg0;
169 le->args[1] = arg1;
170 le->args[2] = arg2;
171 logptr++;
172 logcount++;
173 if (logptr >= LOGSIZE)
174 logptr = 0;
175 }
176
177
178 void
log4(int operation,int arg0,int arg1,int arg2)179 log4(int operation, int arg0, int arg1, int arg2)
180 {
181 do_log4(operation, arg0, arg1, arg2);
182 if (closeopen)
183 do_log4(OP_CLOSEOPEN, 0, 0, 0);
184 if (invl)
185 do_log4(OP_INVALIDATE, 0, 0, 0);
186 }
187
188
189 void
logdump(void)190 logdump(void)
191 {
192 struct log_entry *lp;
193 int i, count, down, opnum;
194
195 prt("LOG DUMP (%d total operations):\n", logcount);
196 if (logcount < LOGSIZE) {
197 i = 0;
198 count = logcount;
199 } else {
200 i = logptr;
201 count = LOGSIZE;
202 }
203
204 opnum = i + 1 + (logcount/LOGSIZE)*LOGSIZE;
205 for ( ; count > 0; count--) {
206 lp = &oplog[i];
207
208 if (lp->operation == OP_CLOSEOPEN ||
209 lp->operation == OP_INVALIDATE) {
210 switch (lp->operation) {
211 case OP_CLOSEOPEN:
212 prt("\t\tCLOSE/OPEN\n");
213 break;
214 case OP_INVALIDATE:
215 prt("\t\tMS_INVALIDATE\n");
216 break;
217 }
218 i++;
219 if (i == LOGSIZE)
220 i = 0;
221 continue;
222 }
223
224 prt("%d(%d mod 256): ", opnum, opnum%256);
225 switch (lp->operation) {
226 case OP_MAPREAD:
227 prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
228 lp->args[0], lp->args[0] + lp->args[1] - 1,
229 lp->args[1]);
230 if (badoff >= lp->args[0] && badoff <
231 lp->args[0] + lp->args[1])
232 prt("\t***RRRR***");
233 break;
234 case OP_MAPWRITE:
235 prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
236 lp->args[0], lp->args[0] + lp->args[1] - 1,
237 lp->args[1]);
238 if (badoff >= lp->args[0] && badoff <
239 lp->args[0] + lp->args[1])
240 prt("\t******WWWW");
241 break;
242 case OP_READ:
243 prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
244 lp->args[0], lp->args[0] + lp->args[1] - 1,
245 lp->args[1]);
246 if (badoff >= lp->args[0] &&
247 badoff < lp->args[0] + lp->args[1])
248 prt("\t***RRRR***");
249 break;
250 case OP_WRITE:
251 {
252 int offset = lp->args[0];
253 int len = lp->args[1];
254 int oldlen = lp->args[2];
255
256 prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
257 offset, offset + len - 1,
258 len);
259 if (offset > oldlen)
260 prt(" HOLE");
261 else if (offset + len > oldlen)
262 prt(" EXTEND");
263 if ((badoff >= offset || badoff >=oldlen) &&
264 badoff < offset + len)
265 prt("\t***WWWW");
266 }
267 break;
268 case OP_TRUNCATE:
269 down = lp->args[0] < lp->args[1];
270 prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
271 down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
272 if (badoff >= lp->args[!down] &&
273 badoff < lp->args[!!down])
274 prt("\t******WWWW");
275 break;
276 case OP_SKIPPED:
277 prt("SKIPPED (no operation)");
278 break;
279 default:
280 prt("BOGUS LOG ENTRY (operation code = %d)!",
281 lp->operation);
282 }
283 prt("\n");
284 opnum++;
285 i++;
286 if (i == LOGSIZE)
287 i = 0;
288 }
289 }
290
291
292 void
save_buffer(char * buffer,off_t bufferlength,int savefd)293 save_buffer(char *buffer, off_t bufferlength, int savefd)
294 {
295 off_t ret;
296 ssize_t byteswritten;
297
298 if (savefd <= 0 || bufferlength == 0)
299 return;
300
301 if (bufferlength > SSIZE_MAX) {
302 prt("fsx flaw: overflow in save_buffer\n");
303 exit(67);
304 }
305 if (lite) {
306 off_t size_by_seek = lseek(savefd, (off_t)0, SEEK_END);
307 if (size_by_seek == (off_t)-1)
308 prterr("save_buffer: lseek eof");
309 else if (bufferlength > size_by_seek) {
310 warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
311 (unsigned long long)bufferlength);
312 bufferlength = size_by_seek;
313 }
314 }
315
316 ret = lseek(savefd, (off_t)0, SEEK_SET);
317 if (ret == (off_t)-1)
318 prterr("save_buffer: lseek 0");
319
320 byteswritten = write(savefd, buffer, (size_t)bufferlength);
321 if (byteswritten != bufferlength) {
322 if (byteswritten == -1)
323 prterr("save_buffer write");
324 else
325 warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
326 (unsigned)byteswritten,
327 (unsigned long long)bufferlength);
328 }
329 }
330
331
332 void
report_failure(int status)333 report_failure(int status)
334 {
335 logdump();
336
337 if (fsxgoodfd) {
338 if (good_buf) {
339 save_buffer(good_buf, file_size, fsxgoodfd);
340 prt("Correct content saved for comparison\n");
341 prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
342 fname, fname);
343 }
344 close(fsxgoodfd);
345 }
346 exit(status);
347 }
348
349
350 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
351 *(((unsigned char *)(cp)) + 1)))
352
353 void
check_buffers(unsigned offset,unsigned size)354 check_buffers(unsigned offset, unsigned size)
355 {
356 unsigned char c, t;
357 unsigned i = 0;
358 unsigned n = 0;
359 unsigned op = 0;
360 unsigned bad = 0;
361
362 if (memcmp(good_buf + offset, temp_buf, size) != 0) {
363 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
364 offset, size);
365 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
366 while (size > 0) {
367 c = good_buf[offset];
368 t = temp_buf[i];
369 if (c != t) {
370 if (n == 0) {
371 bad = short_at(&temp_buf[i]);
372 prt("0x%5x\t0x%04x\t0x%04x", offset,
373 short_at(&good_buf[offset]), bad);
374 op = temp_buf[offset & 1 ? i+1 : i];
375 }
376 n++;
377 badoff = offset;
378 }
379 offset++;
380 i++;
381 size--;
382 }
383 if (n) {
384 prt("\t0x%5x\n", n);
385 if (bad)
386 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
387 else
388 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
389 } else
390 prt("????????????????\n");
391 report_failure(110);
392 }
393 }
394
395
396 void
check_size(void)397 check_size(void)
398 {
399 struct stat statbuf;
400 off_t size_by_seek;
401
402 if (fstat(fd, &statbuf)) {
403 prterr("check_size: fstat");
404 statbuf.st_size = -1;
405 }
406 size_by_seek = lseek(fd, (off_t)0, SEEK_END);
407 if (file_size != statbuf.st_size || file_size != size_by_seek) {
408 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
409 (unsigned long long)file_size,
410 (unsigned long long)statbuf.st_size,
411 (unsigned long long)size_by_seek);
412 report_failure(120);
413 }
414 }
415
416
417 void
check_trunc_hack(void)418 check_trunc_hack(void)
419 {
420 struct stat statbuf;
421
422 ftruncate(fd, (off_t)0);
423 ftruncate(fd, (off_t)100000);
424 fstat(fd, &statbuf);
425 if (statbuf.st_size != (off_t)100000) {
426 prt("no extend on truncate! not posix!\n");
427 exit(130);
428 }
429 ftruncate(fd, (off_t)0);
430 }
431
432
433 void
doread(off_t offset,off_t size)434 doread(off_t offset, off_t size)
435 {
436 off_t ret;
437 ssize_t iret;
438
439 offset -= offset % readbdy;
440 if (size == 0) {
441 if (!quiet && testcalls > simulatedopcount)
442 prt("skipping zero size read\n");
443 log4(OP_SKIPPED, OP_READ, offset, size);
444 return;
445 }
446 if (size + offset > file_size) {
447 if (!quiet && testcalls > simulatedopcount)
448 prt("skipping seek/read past end of file\n");
449 log4(OP_SKIPPED, OP_READ, offset, size);
450 return;
451 }
452
453 log4(OP_READ, offset, size, 0);
454
455 if (testcalls <= simulatedopcount)
456 return;
457
458 if (!quiet && ((progressinterval &&
459 testcalls % progressinterval == 0) ||
460 (debug &&
461 (monitorstart == -1 ||
462 (offset + size > monitorstart &&
463 (monitorend == -1 || offset <= monitorend))))))
464 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
465 offset, offset + size - 1, size);
466 ret = lseek(fd, (off_t)offset, SEEK_SET);
467 if (ret == (off_t)-1) {
468 prterr("doread: lseek");
469 report_failure(140);
470 }
471 iret = read(fd, temp_buf, size);
472 if (iret != size) {
473 if (iret == -1)
474 prterr("doread: read");
475 else
476 prt("short read: 0x%x bytes instead of 0x%x\n",
477 iret, size);
478 report_failure(141);
479 }
480 check_buffers(offset, size);
481 }
482
483
484 void
check_eofpage(const char * s,unsigned offset,char * p,int size)485 check_eofpage(const char *s, unsigned offset, char *p, int size)
486 {
487 uintptr_t last_page, should_be_zero;
488
489 if (offset + size <= (file_size & ~page_mask))
490 return;
491 /*
492 * we landed in the last page of the file
493 * test to make sure the VM system provided 0's
494 * beyond the true end of the file mapping
495 * (as required by mmap def in 1996 posix 1003.1)
496 */
497 last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;
498
499 for (should_be_zero = last_page + (file_size & page_mask);
500 should_be_zero < last_page + page_size;
501 should_be_zero++)
502 if (*(char *)should_be_zero) {
503 prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
504 s, file_size - 1, should_be_zero & page_mask,
505 short_at(should_be_zero));
506 report_failure(205);
507 }
508 }
509
510
511 void
domapread(unsigned offset,unsigned size)512 domapread(unsigned offset, unsigned size)
513 {
514 unsigned pg_offset;
515 unsigned map_size;
516 char *p;
517
518 offset -= offset % readbdy;
519 if (size == 0) {
520 if (!quiet && testcalls > simulatedopcount)
521 prt("skipping zero size read\n");
522 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
523 return;
524 }
525 if (size + offset > file_size) {
526 if (!quiet && testcalls > simulatedopcount)
527 prt("skipping seek/read past end of file\n");
528 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
529 return;
530 }
531
532 log4(OP_MAPREAD, offset, size, 0);
533
534 if (testcalls <= simulatedopcount)
535 return;
536
537 if (!quiet && ((progressinterval &&
538 testcalls % progressinterval == 0) ||
539 (debug &&
540 (monitorstart == -1 ||
541 (offset + size > monitorstart &&
542 (monitorend == -1 || offset <= monitorend))))))
543 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
544 offset, offset + size - 1, size);
545
546 pg_offset = offset & page_mask;
547 map_size = pg_offset + size;
548
549 if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
550 (off_t)(offset - pg_offset))) == (char *)-1) {
551 prterr("domapread: mmap");
552 report_failure(190);
553 }
554 memcpy(temp_buf, p + pg_offset, size);
555
556 check_eofpage("Read", offset, p, size);
557
558 if (munmap(p, map_size) != 0) {
559 prterr("domapread: munmap");
560 report_failure(191);
561 }
562
563 check_buffers(offset, size);
564 }
565
566
567 void
gendata(unsigned offset,unsigned size)568 gendata(unsigned offset, unsigned size)
569 {
570 while (size--) {
571 good_buf[offset] = testcalls % 256;
572 if (offset % 2)
573 good_buf[offset] += original_buf[offset];
574 offset++;
575 }
576 }
577
578
579 void
dowrite(unsigned offset,unsigned size)580 dowrite(unsigned offset, unsigned size)
581 {
582 off_t ret;
583 ssize_t iret;
584
585 offset -= offset % writebdy;
586 if (size == 0) {
587 if (!quiet && testcalls > simulatedopcount)
588 prt("skipping zero size write\n");
589 log4(OP_SKIPPED, OP_WRITE, offset, size);
590 return;
591 }
592
593 log4(OP_WRITE, offset, size, file_size);
594
595 gendata(offset, size);
596 if (file_size < offset + size) {
597 if (file_size < offset)
598 memset(good_buf + file_size, '\0', offset - file_size);
599 file_size = offset + size;
600 if (lite) {
601 warn("Lite file size bug in fsx!");
602 report_failure(149);
603 }
604 }
605
606 if (testcalls <= simulatedopcount)
607 return;
608
609 if (!quiet && ((progressinterval &&
610 testcalls % progressinterval == 0) ||
611 (debug &&
612 (monitorstart == -1 ||
613 (offset + size > monitorstart &&
614 (monitorend == -1 || offset <= monitorend))))))
615 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
616 offset, offset + size - 1, size);
617 ret = lseek(fd, (off_t)offset, SEEK_SET);
618 if (ret == (off_t)-1) {
619 prterr("dowrite: lseek");
620 report_failure(150);
621 }
622 iret = write(fd, good_buf + offset, size);
623 if (iret != size) {
624 if (iret == -1)
625 prterr("dowrite: write");
626 else
627 prt("short write: 0x%x bytes instead of 0x%x\n",
628 iret, size);
629 report_failure(151);
630 }
631 }
632
633
634 void
domapwrite(unsigned offset,unsigned size)635 domapwrite(unsigned offset, unsigned size)
636 {
637 unsigned pg_offset;
638 unsigned map_size;
639 off_t cur_filesize;
640 char *p;
641
642 offset -= offset % writebdy;
643 if (size == 0) {
644 if (!quiet && testcalls > simulatedopcount)
645 prt("skipping zero size write\n");
646 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
647 return;
648 }
649 cur_filesize = file_size;
650
651 log4(OP_MAPWRITE, offset, size, 0);
652
653 gendata(offset, size);
654 if (file_size < offset + size) {
655 if (file_size < offset)
656 memset(good_buf + file_size, '\0', offset - file_size);
657 file_size = offset + size;
658 if (lite) {
659 warn("Lite file size bug in fsx!");
660 report_failure(200);
661 }
662 }
663
664 if (testcalls <= simulatedopcount)
665 return;
666
667 if (!quiet && ((progressinterval &&
668 testcalls % progressinterval == 0) ||
669 (debug &&
670 (monitorstart == -1 ||
671 (offset + size > monitorstart &&
672 (monitorend == -1 || offset <= monitorend))))))
673 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
674 offset, offset + size - 1, size);
675
676 if (file_size > cur_filesize) {
677 if (ftruncate(fd, file_size) == -1) {
678 prterr("domapwrite: ftruncate");
679 exit(201);
680 }
681 }
682 pg_offset = offset & page_mask;
683 map_size = pg_offset + size;
684
685 if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
686 MAP_FILE | MAP_SHARED, fd,
687 (off_t)(offset - pg_offset))) == MAP_FAILED) {
688 prterr("domapwrite: mmap");
689 report_failure(202);
690 }
691 memcpy(p + pg_offset, good_buf + offset, size);
692 if (mapped_msync && msync(p, map_size, MS_SYNC) != 0) {
693 prterr("domapwrite: msync");
694 report_failure(203);
695 }
696
697 check_eofpage("Write", offset, p, size);
698
699 if (munmap(p, map_size) != 0) {
700 prterr("domapwrite: munmap");
701 report_failure(204);
702 }
703 }
704
705
706 void
dotruncate(unsigned size)707 dotruncate(unsigned size)
708 {
709 int oldsize = file_size;
710
711 size -= size % truncbdy;
712 if (size > biggest) {
713 biggest = size;
714 if (!quiet && testcalls > simulatedopcount)
715 prt("truncating to largest ever: 0x%x\n", size);
716 }
717
718 log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
719
720 if (size > file_size)
721 memset(good_buf + file_size, '\0', size - file_size);
722 file_size = size;
723
724 if (testcalls <= simulatedopcount)
725 return;
726
727 if ((progressinterval && testcalls % progressinterval == 0) ||
728 (debug && (monitorstart == -1 || monitorend == -1 ||
729 size <= monitorend)))
730 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
731 if (ftruncate(fd, (off_t)size) == -1) {
732 prt("ftruncate1: %x\n", size);
733 prterr("dotruncate: ftruncate");
734 report_failure(160);
735 }
736 }
737
738
739 void
writefileimage()740 writefileimage()
741 {
742 ssize_t iret;
743
744 if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
745 prterr("writefileimage: lseek");
746 report_failure(171);
747 }
748 iret = write(fd, good_buf, file_size);
749 if ((off_t)iret != file_size) {
750 if (iret == -1)
751 prterr("writefileimage: write");
752 else
753 prt("short write: 0x%x bytes instead of 0x%llx\n",
754 iret, (unsigned long long)file_size);
755 report_failure(172);
756 }
757 if (lite ? 0 : ftruncate(fd, file_size) == -1) {
758 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
759 prterr("writefileimage: ftruncate");
760 report_failure(173);
761 }
762 }
763
764
765 void
docloseopen(void)766 docloseopen(void)
767 {
768 if (testcalls <= simulatedopcount)
769 return;
770
771 if (debug)
772 prt("%lu close/open\n", testcalls);
773 if (close(fd)) {
774 prterr("docloseopen: close");
775 report_failure(180);
776 }
777 fd = open(fname, O_RDWR, 0);
778 if (fd < 0) {
779 prterr("docloseopen: open");
780 report_failure(181);
781 }
782 }
783
784
785 void
doinvl(void)786 doinvl(void)
787 {
788 char *p;
789
790 if (file_size == 0)
791 return;
792 if (testcalls <= simulatedopcount)
793 return;
794 if (debug)
795 prt("%lu msync(MS_INVALIDATE)\n", testcalls);
796
797 if ((p = (char *)mmap(0, file_size, PROT_READ | PROT_WRITE,
798 MAP_FILE | MAP_SHARED, fd, 0)) == MAP_FAILED) {
799 prterr("doinvl: mmap");
800 report_failure(205);
801 }
802
803 if (msync(p, 0, MS_SYNC | MS_INVALIDATE) != 0) {
804 prterr("doinvl: msync");
805 report_failure(206);
806 }
807
808 if (munmap(p, file_size) != 0) {
809 prterr("doinvl: munmap");
810 report_failure(207);
811 }
812 }
813
814
815 void
test(void)816 test(void)
817 {
818 off_t offset;
819 off_t size = maxoplen;
820 unsigned long rv = random();
821 unsigned long op = rv % (3 + !lite + mapped_writes);
822
823 /* turn off the map read if necessary */
824
825 if (op == 2 && !mapped_reads)
826 op = 0;
827
828 if (simulatedopcount > 0 && testcalls == simulatedopcount)
829 writefileimage();
830
831 testcalls++;
832
833 if (closeprob)
834 closeopen = (rv >> 3) < (1ul << 28) / closeprob;
835 if (invlprob)
836 invl = (rv >> 3) < (1ul << 28) / invlprob;
837
838 if (debugstart > 0 && testcalls >= debugstart)
839 debug = 1;
840
841 if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
842 prt("%lu...\n", testcalls);
843
844 /*
845 * READ: op = 0
846 * WRITE: op = 1
847 * MAPREAD: op = 2
848 * TRUNCATE: op = 3
849 * MAPWRITE: op = 3 or 4
850 */
851 if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
852 dotruncate(random() % maxfilelen);
853 else {
854 if (randomoplen)
855 size = random() % (maxoplen+1);
856 if (lite ? 0 : op == 3)
857 dotruncate(size);
858 else {
859 offset = random();
860 if (op == 1 || op == (lite ? 3 : 4)) {
861 offset %= maxfilelen;
862 if (offset + size > maxfilelen)
863 size = maxfilelen - offset;
864 if (op != 1)
865 domapwrite(offset, size);
866 else
867 dowrite(offset, size);
868 } else {
869 if (file_size)
870 offset %= file_size;
871 else
872 offset = 0;
873 if (offset + size > file_size)
874 size = file_size - offset;
875 if (op != 0)
876 domapread(offset, size);
877 else
878 doread(offset, size);
879 }
880 }
881 }
882 if (sizechecks && testcalls > simulatedopcount)
883 check_size();
884 if (invl)
885 doinvl();
886 if (closeopen)
887 docloseopen();
888 }
889
890
891 void
cleanup(sig)892 cleanup(sig)
893 int sig;
894 {
895 if (sig)
896 prt("signal %d\n", sig);
897 prt("testcalls = %lu\n", testcalls);
898 exit(sig);
899 }
900
901
902 void
usage(void)903 usage(void)
904 {
905 fprintf(stdout, "usage: %s",
906 "fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\
907 -b opnum: beginning operation number (default 1)\n\
908 -c P: 1 in P chance of file close+open at each op (default infinity)\n\
909 -d: debug output for all operations\n\
910 -i P: 1 in P chance of calling msync(MS_INVALIDATE) (default infinity)\n\
911 -l flen: the upper bound on file size (default 262144, max 2147483647)\n\
912 -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
913 -n: no verifications of file size\n\
914 -o oplen: the upper bound on operation size (default 65536)\n\
915 -p progressinterval: debug output at specified operation interval\n\
916 -q: quieter operation\n\
917 -r readbdy: 4096 would make reads page aligned (default 1)\n\
918 -s style: 1 gives smaller truncates (default 0)\n\
919 -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
920 -w writebdy: 4096 would make writes page aligned (default 1)\n\
921 -D startingop: debug output starting at specified operation\n\
922 -L: fsxLite - no file creations & no file size changes\n\
923 -N numops: total # operations to do (default infinity)\n\
924 -O: use oplen (see -o flag) for every op (default random)\n\
925 -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
926 -S seed: for random # generator (default 1) 0 gets timestamp\n\
927 -W: mapped write operations DISabled\n\
928 -R: mapped read operations DISabled)\n\
929 -U: msync after mapped write operations DISabled\n\
930 fname: this filename is REQUIRED (no default)\n");
931 exit(90);
932 }
933
934
935 int
getnum(char * s,char ** e)936 getnum(char *s, char **e)
937 {
938 long long ret = -1;
939
940 *e = (char *) 0;
941 ret = strtoll(s, e, 0);
942 if (*e)
943 switch (**e) {
944 case 'b':
945 case 'B':
946 if (ret > INT_MAX / 512)
947 return (-1);
948 ret *= 512;
949 *e = *e + 1;
950 break;
951 case 'k':
952 case 'K':
953 if (ret > INT_MAX / 1024)
954 return (-1);
955 ret *= 1024;
956 *e = *e + 1;
957 break;
958 case 'm':
959 case 'M':
960 if (ret > INT_MAX / 1024 / 1024)
961 return (-1);
962 ret *= 1024*1024;
963 *e = *e + 1;
964 break;
965 case 'w':
966 case 'W':
967 if (ret > INT_MAX / 4)
968 return (-1);
969 ret *= 4;
970 *e = *e + 1;
971 break;
972 default:
973 if (ret > INT_MAX)
974 return (-1);
975 }
976 return (ret);
977 }
978
979
980 int
main(int argc,char ** argv)981 main(int argc, char **argv)
982 {
983 int i, ch;
984 char *endp;
985 char goodfile[1024];
986 char logfile[1024];
987 struct timespec now;
988
989 goodfile[0] = 0;
990 logfile[0] = 0;
991
992 page_size = getpagesize();
993 page_mask = page_size - 1;
994
995 setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
996
997 while ((ch = getopt(argc, argv,
998 "b:c:di:l:m:no:p:qr:s:t:w:D:LN:OP:RS:UW")) != -1)
999 switch (ch) {
1000 case 'b':
1001 simulatedopcount = getnum(optarg, &endp);
1002 if (!quiet)
1003 fprintf(stdout, "Will begin at operation %ld\n",
1004 simulatedopcount);
1005 if (simulatedopcount == 0)
1006 usage();
1007 simulatedopcount -= 1;
1008 break;
1009 case 'c':
1010 closeprob = getnum(optarg, &endp);
1011 if (!quiet)
1012 fprintf(stdout,
1013 "Chance of close/open is 1 in %d\n",
1014 closeprob);
1015 if (closeprob <= 0)
1016 usage();
1017 break;
1018 case 'd':
1019 debug = 1;
1020 break;
1021 case 'i':
1022 invlprob = getnum(optarg, &endp);
1023 if (!quiet)
1024 fprintf(stdout,
1025 "Chance of MS_INVALIDATE is 1 in %d\n",
1026 invlprob);
1027 if (invlprob <= 0)
1028 usage();
1029 break;
1030 case 'l':
1031 maxfilelen = getnum(optarg, &endp);
1032 if (maxfilelen <= 0)
1033 usage();
1034 break;
1035 case 'm':
1036 monitorstart = getnum(optarg, &endp);
1037 if (monitorstart < 0)
1038 usage();
1039 if (!endp || *endp++ != ':')
1040 usage();
1041 monitorend = getnum(endp, &endp);
1042 if (monitorend < 0)
1043 usage();
1044 if (monitorend == 0)
1045 monitorend = -1; /* aka infinity */
1046 debug = 1;
1047 case 'n':
1048 sizechecks = 0;
1049 break;
1050 case 'o':
1051 maxoplen = getnum(optarg, &endp);
1052 if (maxoplen <= 0)
1053 usage();
1054 break;
1055 case 'p':
1056 progressinterval = getnum(optarg, &endp);
1057 if (progressinterval < 0)
1058 usage();
1059 break;
1060 case 'q':
1061 quiet = 1;
1062 break;
1063 case 'r':
1064 readbdy = getnum(optarg, &endp);
1065 if (readbdy <= 0)
1066 usage();
1067 break;
1068 case 's':
1069 style = getnum(optarg, &endp);
1070 if (style < 0 || style > 1)
1071 usage();
1072 break;
1073 case 't':
1074 truncbdy = getnum(optarg, &endp);
1075 if (truncbdy <= 0)
1076 usage();
1077 break;
1078 case 'w':
1079 writebdy = getnum(optarg, &endp);
1080 if (writebdy <= 0)
1081 usage();
1082 break;
1083 case 'D':
1084 debugstart = getnum(optarg, &endp);
1085 if (debugstart < 1)
1086 usage();
1087 break;
1088 case 'L':
1089 lite = 1;
1090 break;
1091 case 'N':
1092 numops = getnum(optarg, &endp);
1093 if (numops < 0)
1094 usage();
1095 break;
1096 case 'O':
1097 randomoplen = 0;
1098 break;
1099 case 'P':
1100 strncpy(goodfile, optarg, sizeof(goodfile));
1101 strcat(goodfile, "/");
1102 strncpy(logfile, optarg, sizeof(logfile));
1103 strcat(logfile, "/");
1104 break;
1105 case 'R':
1106 mapped_reads = 0;
1107 if (!quiet)
1108 fprintf(stdout, "mapped reads DISABLED\n");
1109 break;
1110 case 'S':
1111 seed = getnum(optarg, &endp);
1112 if (seed == 0) {
1113 if (clock_gettime(CLOCK_REALTIME, &now) != 0)
1114 err(1, "clock_gettime");
1115 seed = now.tv_nsec % 10000;
1116 }
1117 if (!quiet)
1118 fprintf(stdout, "Seed set to %d\n", seed);
1119 if (seed < 0)
1120 usage();
1121 break;
1122 case 'W':
1123 mapped_writes = 0;
1124 if (!quiet)
1125 fprintf(stdout, "mapped writes DISABLED\n");
1126 break;
1127 case 'U':
1128 mapped_msync = 0;
1129 if (!quiet)
1130 fprintf(stdout, "mapped msync DISABLED\n");
1131 break;
1132
1133 default:
1134 usage();
1135 /* NOTREACHED */
1136 }
1137 argc -= optind;
1138 argv += optind;
1139 if (argc != 1)
1140 usage();
1141 fname = argv[0];
1142
1143 signal(SIGHUP, cleanup);
1144 signal(SIGINT, cleanup);
1145 signal(SIGPIPE, cleanup);
1146 signal(SIGALRM, cleanup);
1147 signal(SIGTERM, cleanup);
1148 signal(SIGXCPU, cleanup);
1149 signal(SIGXFSZ, cleanup);
1150 signal(SIGVTALRM, cleanup);
1151 signal(SIGUSR1, cleanup);
1152 signal(SIGUSR2, cleanup);
1153
1154 initstate(seed, state, 256);
1155 setstate(state);
1156 fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1157 if (fd < 0) {
1158 prterr(fname);
1159 exit(91);
1160 }
1161 strncat(goodfile, fname, 256);
1162 strcat (goodfile, ".fsxgood");
1163 fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1164 if (fsxgoodfd < 0) {
1165 prterr(goodfile);
1166 exit(92);
1167 }
1168 strncat(logfile, fname, 256);
1169 strcat (logfile, ".fsxlog");
1170 fsxlogf = fopen(logfile, "w");
1171 if (fsxlogf == NULL) {
1172 prterr(logfile);
1173 exit(93);
1174 }
1175 if (lite) {
1176 off_t ret;
1177 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1178 if (file_size == (off_t)-1) {
1179 prterr(fname);
1180 warn("main: lseek eof");
1181 exit(94);
1182 }
1183 ret = lseek(fd, (off_t)0, SEEK_SET);
1184 if (ret == (off_t)-1) {
1185 prterr(fname);
1186 warn("main: lseek 0");
1187 exit(95);
1188 }
1189 }
1190 original_buf = (char *) malloc(maxfilelen);
1191 for (i = 0; i < maxfilelen; i++)
1192 original_buf[i] = random() % 256;
1193 good_buf = (char *) malloc(maxfilelen);
1194 memset(good_buf, '\0', maxfilelen);
1195 temp_buf = (char *) malloc(maxoplen);
1196 memset(temp_buf, '\0', maxoplen);
1197 if (lite) { /* zero entire existing file */
1198 ssize_t written;
1199
1200 written = write(fd, good_buf, (size_t)maxfilelen);
1201 if (written != maxfilelen) {
1202 if (written == -1) {
1203 prterr(fname);
1204 warn("main: error on write");
1205 } else
1206 warn("main: short write, 0x%x bytes instead of 0x%lx\n",
1207 (unsigned)written, maxfilelen);
1208 exit(98);
1209 }
1210 } else
1211 check_trunc_hack();
1212
1213 while (numops == -1 || numops--)
1214 test();
1215
1216 if (close(fd)) {
1217 prterr("close");
1218 report_failure(99);
1219 }
1220 prt("All operations completed A-OK!\n");
1221
1222 exit(0);
1223 return 0;
1224 }
1225
1226