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 * $FreeBSD$
40 *
41 */
42
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #ifdef _UWIN
46 # include <sys/param.h>
47 # include <limits.h>
48 # include <time.h>
49 # include <strings.h>
50 #endif
51 #include <fcntl.h>
52 #include <sys/mman.h>
53 #ifndef MAP_FILE
54 # define MAP_FILE 0
55 #endif
56 #include <limits.h>
57 #include <signal.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62 #include <stdarg.h>
63 #include <errno.h>
64
65 #define NUMPRINTCOLUMNS 32 /* # columns of data to print on each line */
66
67 /*
68 * A log entry is an operation and a bunch of arguments.
69 */
70
71 struct log_entry {
72 int operation;
73 int args[3];
74 };
75
76 #define LOGSIZE 1000
77
78 struct log_entry oplog[LOGSIZE]; /* the log */
79 int logptr = 0; /* current position in log */
80 int logcount = 0; /* total ops */
81
82 /*
83 * Define operations
84 */
85
86 #define OP_READ 1
87 #define OP_WRITE 2
88 #define OP_TRUNCATE 3
89 #define OP_CLOSEOPEN 4
90 #define OP_MAPREAD 5
91 #define OP_MAPWRITE 6
92 #define OP_SKIPPED 7
93 #define OP_INVALIDATE 8
94
95 int page_size;
96 int page_mask;
97
98 char *original_buf; /* a pointer to the original data */
99 char *good_buf; /* a pointer to the correct data */
100 char *temp_buf; /* a pointer to the current data */
101 char *fname; /* name of our test file */
102 int fd; /* fd for our test file */
103
104 off_t file_size = 0;
105 off_t biggest = 0;
106 char state[256];
107 unsigned long testcalls = 0; /* calls to function "test" */
108
109 unsigned long simulatedopcount = 0; /* -b flag */
110 int closeprob = 0; /* -c flag */
111 int invlprob = 0; /* -i flag */
112 int debug = 0; /* -d flag */
113 unsigned long debugstart = 0; /* -D flag */
114 unsigned long maxfilelen = 256 * 1024; /* -l flag */
115 int sizechecks = 1; /* -n flag disables them */
116 int maxoplen = 64 * 1024; /* -o flag */
117 int quiet = 0; /* -q flag */
118 unsigned long progressinterval = 0; /* -p flag */
119 int readbdy = 1; /* -r flag */
120 int style = 0; /* -s flag */
121 int truncbdy = 1; /* -t flag */
122 int writebdy = 1; /* -w flag */
123 long monitorstart = -1; /* -m flag */
124 long monitorend = -1; /* -m flag */
125 int lite = 0; /* -L flag */
126 long numops = -1; /* -N flag */
127 int randomoplen = 1; /* -O flag disables it */
128 int seed = 1; /* -S flag */
129 int mapped_writes = 1; /* -W flag disables */
130 int mapped_reads = 1; /* -R flag disables it */
131 int mapped_msync = 1; /* -U flag disables */
132 int fsxgoodfd = 0;
133 FILE * fsxlogf = NULL;
134 int badoff = -1;
135 int closeopen = 0;
136 int invl = 0;
137
138
139 void
vwarnc(code,fmt,ap)140 vwarnc(code, fmt, ap)
141 int code;
142 const char *fmt;
143 va_list ap;
144 {
145 fprintf(stderr, "fsx: ");
146 if (fmt != NULL) {
147 vfprintf(stderr, fmt, ap);
148 fprintf(stderr, ": ");
149 }
150 fprintf(stderr, "%s\n", strerror(code));
151 }
152
153
154 void
warn(const char * fmt,...)155 warn(const char * fmt, ...)
156 {
157 va_list ap;
158 va_start(ap, fmt);
159 vwarnc(errno, fmt, ap);
160 va_end(ap);
161 }
162
163
164 void
prt(char * fmt,...)165 prt(char *fmt, ...)
166 {
167 va_list args;
168
169 va_start(args, fmt);
170 vfprintf(stdout, fmt, args);
171 va_end(args);
172
173 if (fsxlogf) {
174 va_start(args, fmt);
175 vfprintf(fsxlogf, fmt, args);
176 va_end(args);
177 }
178 }
179
180 void
prterr(char * prefix)181 prterr(char *prefix)
182 {
183 prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
184 }
185
186
187 void
do_log4(int operation,int arg0,int arg1,int arg2)188 do_log4(int operation, int arg0, int arg1, int arg2)
189 {
190 struct log_entry *le;
191
192 le = &oplog[logptr];
193 le->operation = operation;
194 le->args[0] = arg0;
195 le->args[1] = arg1;
196 le->args[2] = arg2;
197 logptr++;
198 logcount++;
199 if (logptr >= LOGSIZE)
200 logptr = 0;
201 }
202
203
204 void
log4(int operation,int arg0,int arg1,int arg2)205 log4(int operation, int arg0, int arg1, int arg2)
206 {
207 do_log4(operation, arg0, arg1, arg2);
208 if (closeopen)
209 do_log4(OP_CLOSEOPEN, 0, 0, 0);
210 if (invl)
211 do_log4(OP_INVALIDATE, 0, 0, 0);
212 }
213
214
215 void
logdump(void)216 logdump(void)
217 {
218 struct log_entry *lp;
219 int i, count, down, opnum;
220
221 prt("LOG DUMP (%d total operations):\n", logcount);
222 if (logcount < LOGSIZE) {
223 i = 0;
224 count = logcount;
225 } else {
226 i = logptr;
227 count = LOGSIZE;
228 }
229
230 opnum = i + 1 + (logcount/LOGSIZE)*LOGSIZE;
231 for ( ; count > 0; count--) {
232 lp = &oplog[i];
233
234 if (lp->operation == OP_CLOSEOPEN ||
235 lp->operation == OP_INVALIDATE) {
236 switch (lp->operation) {
237 case OP_CLOSEOPEN:
238 prt("\t\tCLOSE/OPEN\n");
239 break;
240 case OP_INVALIDATE:
241 prt("\t\tMS_INVALIDATE\n");
242 break;
243 }
244 i++;
245 if (i == LOGSIZE)
246 i = 0;
247 continue;
248 }
249
250 prt("%d(%d mod 256): ", opnum, opnum%256);
251 switch (lp->operation) {
252 case OP_MAPREAD:
253 prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
254 lp->args[0], lp->args[0] + lp->args[1] - 1,
255 lp->args[1]);
256 if (badoff >= lp->args[0] && badoff <
257 lp->args[0] + lp->args[1])
258 prt("\t***RRRR***");
259 break;
260 case OP_MAPWRITE:
261 prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
262 lp->args[0], lp->args[0] + lp->args[1] - 1,
263 lp->args[1]);
264 if (badoff >= lp->args[0] && badoff <
265 lp->args[0] + lp->args[1])
266 prt("\t******WWWW");
267 break;
268 case OP_READ:
269 prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
270 lp->args[0], lp->args[0] + lp->args[1] - 1,
271 lp->args[1]);
272 if (badoff >= lp->args[0] &&
273 badoff < lp->args[0] + lp->args[1])
274 prt("\t***RRRR***");
275 break;
276 case OP_WRITE:
277 prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
278 lp->args[0], lp->args[0] + lp->args[1] - 1,
279 lp->args[1]);
280 if (lp->args[0] > lp->args[2])
281 prt(" HOLE");
282 else if (lp->args[0] + lp->args[1] > lp->args[2])
283 prt(" EXTEND");
284 if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
285 badoff < lp->args[0] + lp->args[1])
286 prt("\t***WWWW");
287 break;
288 case OP_TRUNCATE:
289 down = lp->args[0] < lp->args[1];
290 prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
291 down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
292 if (badoff >= lp->args[!down] &&
293 badoff < lp->args[!!down])
294 prt("\t******WWWW");
295 break;
296 case OP_SKIPPED:
297 prt("SKIPPED (no operation)");
298 break;
299 default:
300 prt("BOGUS LOG ENTRY (operation code = %d)!",
301 lp->operation);
302 }
303 prt("\n");
304 opnum++;
305 i++;
306 if (i == LOGSIZE)
307 i = 0;
308 }
309 }
310
311
312 void
save_buffer(char * buffer,off_t bufferlength,int fd)313 save_buffer(char *buffer, off_t bufferlength, int fd)
314 {
315 off_t ret;
316 ssize_t byteswritten;
317
318 if (fd <= 0 || bufferlength == 0)
319 return;
320
321 if (bufferlength > SSIZE_MAX) {
322 prt("fsx flaw: overflow in save_buffer\n");
323 exit(67);
324 }
325 if (lite) {
326 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
327 if (size_by_seek == (off_t)-1)
328 prterr("save_buffer: lseek eof");
329 else if (bufferlength > size_by_seek) {
330 warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
331 (unsigned long long)bufferlength);
332 bufferlength = size_by_seek;
333 }
334 }
335
336 ret = lseek(fd, (off_t)0, SEEK_SET);
337 if (ret == (off_t)-1)
338 prterr("save_buffer: lseek 0");
339
340 byteswritten = write(fd, buffer, (size_t)bufferlength);
341 if (byteswritten != bufferlength) {
342 if (byteswritten == -1)
343 prterr("save_buffer write");
344 else
345 warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
346 (unsigned)byteswritten,
347 (unsigned long long)bufferlength);
348 }
349 }
350
351
352 void
report_failure(int status)353 report_failure(int status)
354 {
355 logdump();
356
357 if (fsxgoodfd) {
358 if (good_buf) {
359 save_buffer(good_buf, file_size, fsxgoodfd);
360 prt("Correct content saved for comparison\n");
361 prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
362 fname, fname);
363 }
364 close(fsxgoodfd);
365 }
366 exit(status);
367 }
368
369
370 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
371 *(((unsigned char *)(cp)) + 1)))
372
373 void
check_buffers(unsigned offset,unsigned size)374 check_buffers(unsigned offset, unsigned size)
375 {
376 unsigned char c, t;
377 unsigned i = 0;
378 unsigned n = 0;
379 unsigned op = 0;
380 unsigned bad = 0;
381
382 if (memcmp(good_buf + offset, temp_buf, size) != 0) {
383 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
384 offset, size);
385 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
386 while (size > 0) {
387 c = good_buf[offset];
388 t = temp_buf[i];
389 if (c != t) {
390 if (n == 0) {
391 bad = short_at(&temp_buf[i]);
392 prt("0x%5x\t0x%04x\t0x%04x", offset,
393 short_at(&good_buf[offset]), bad);
394 op = temp_buf[offset & 1 ? i+1 : i];
395 }
396 n++;
397 badoff = offset;
398 }
399 offset++;
400 i++;
401 size--;
402 }
403 if (n) {
404 prt("\t0x%5x\n", n);
405 if (bad)
406 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
407 else
408 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
409 } else
410 prt("????????????????\n");
411 report_failure(110);
412 }
413 }
414
415
416 void
check_size(void)417 check_size(void)
418 {
419 struct stat statbuf;
420 off_t size_by_seek;
421
422 if (fstat(fd, &statbuf)) {
423 prterr("check_size: fstat");
424 statbuf.st_size = -1;
425 }
426 size_by_seek = lseek(fd, (off_t)0, SEEK_END);
427 if (file_size != statbuf.st_size || file_size != size_by_seek) {
428 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
429 (unsigned long long)file_size,
430 (unsigned long long)statbuf.st_size,
431 (unsigned long long)size_by_seek);
432 report_failure(120);
433 }
434 }
435
436
437 void
check_trunc_hack(void)438 check_trunc_hack(void)
439 {
440 struct stat statbuf;
441
442 ftruncate(fd, (off_t)0);
443 ftruncate(fd, (off_t)100000);
444 fstat(fd, &statbuf);
445 if (statbuf.st_size != (off_t)100000) {
446 prt("no extend on truncate! not posix!\n");
447 exit(130);
448 }
449 ftruncate(fd, (off_t)0);
450 }
451
452
453 void
doread(unsigned offset,unsigned size)454 doread(unsigned offset, unsigned size)
455 {
456 off_t ret;
457 unsigned iret;
458
459 offset -= offset % readbdy;
460 if (size == 0) {
461 if (!quiet && testcalls > simulatedopcount)
462 prt("skipping zero size read\n");
463 log4(OP_SKIPPED, OP_READ, offset, size);
464 return;
465 }
466 if (size + offset > file_size) {
467 if (!quiet && testcalls > simulatedopcount)
468 prt("skipping seek/read past end of file\n");
469 log4(OP_SKIPPED, OP_READ, offset, size);
470 return;
471 }
472
473 log4(OP_READ, offset, size, 0);
474
475 if (testcalls <= simulatedopcount)
476 return;
477
478 if (!quiet && ((progressinterval &&
479 testcalls % progressinterval == 0) ||
480 (debug &&
481 (monitorstart == -1 ||
482 (offset + size > monitorstart &&
483 (monitorend == -1 || offset <= monitorend))))))
484 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
485 offset, offset + size - 1, size);
486 ret = lseek(fd, (off_t)offset, SEEK_SET);
487 if (ret == (off_t)-1) {
488 prterr("doread: lseek");
489 report_failure(140);
490 }
491 iret = read(fd, temp_buf, size);
492 if (iret != size) {
493 if (iret == -1)
494 prterr("doread: read");
495 else
496 prt("short read: 0x%x bytes instead of 0x%x\n",
497 iret, size);
498 report_failure(141);
499 }
500 check_buffers(offset, size);
501 }
502
503
504 void
check_eofpage(char * s,unsigned offset,char * p,int size)505 check_eofpage(char *s, unsigned offset, char *p, int size)
506 {
507 uintptr_t last_page, should_be_zero;
508
509 if (offset + size <= (file_size & ~page_mask))
510 return;
511 /*
512 * we landed in the last page of the file
513 * test to make sure the VM system provided 0's
514 * beyond the true end of the file mapping
515 * (as required by mmap def in 1996 posix 1003.1)
516 */
517 last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;
518
519 for (should_be_zero = last_page + (file_size & page_mask);
520 should_be_zero < last_page + page_size;
521 should_be_zero++)
522 if (*(char *)should_be_zero) {
523 prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
524 s, file_size - 1, should_be_zero & page_mask,
525 short_at(should_be_zero));
526 report_failure(205);
527 }
528 }
529
530
531 void
domapread(unsigned offset,unsigned size)532 domapread(unsigned offset, unsigned size)
533 {
534 unsigned pg_offset;
535 unsigned map_size;
536 char *p;
537
538 offset -= offset % readbdy;
539 if (size == 0) {
540 if (!quiet && testcalls > simulatedopcount)
541 prt("skipping zero size read\n");
542 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
543 return;
544 }
545 if (size + offset > file_size) {
546 if (!quiet && testcalls > simulatedopcount)
547 prt("skipping seek/read past end of file\n");
548 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
549 return;
550 }
551
552 log4(OP_MAPREAD, offset, size, 0);
553
554 if (testcalls <= simulatedopcount)
555 return;
556
557 if (!quiet && ((progressinterval &&
558 testcalls % progressinterval == 0) ||
559 (debug &&
560 (monitorstart == -1 ||
561 (offset + size > monitorstart &&
562 (monitorend == -1 || offset <= monitorend))))))
563 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
564 offset, offset + size - 1, size);
565
566 pg_offset = offset & page_mask;
567 map_size = pg_offset + size;
568
569 if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
570 (off_t)(offset - pg_offset))) == (char *)-1) {
571 prterr("domapread: mmap");
572 report_failure(190);
573 }
574 memcpy(temp_buf, p + pg_offset, size);
575
576 check_eofpage("Read", offset, p, size);
577
578 if (munmap(p, map_size) != 0) {
579 prterr("domapread: munmap");
580 report_failure(191);
581 }
582
583 check_buffers(offset, size);
584 }
585
586
587 void
gendata(char * original_buf,char * good_buf,unsigned offset,unsigned size)588 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
589 {
590 while (size--) {
591 good_buf[offset] = testcalls % 256;
592 if (offset % 2)
593 good_buf[offset] += original_buf[offset];
594 offset++;
595 }
596 }
597
598
599 void
dowrite(unsigned offset,unsigned size)600 dowrite(unsigned offset, unsigned size)
601 {
602 off_t ret;
603 unsigned iret;
604
605 offset -= offset % writebdy;
606 if (size == 0) {
607 if (!quiet && testcalls > simulatedopcount)
608 prt("skipping zero size write\n");
609 log4(OP_SKIPPED, OP_WRITE, offset, size);
610 return;
611 }
612
613 log4(OP_WRITE, offset, size, file_size);
614
615 gendata(original_buf, good_buf, offset, size);
616 if (file_size < offset + size) {
617 if (file_size < offset)
618 memset(good_buf + file_size, '\0', offset - file_size);
619 file_size = offset + size;
620 if (lite) {
621 warn("Lite file size bug in fsx!");
622 report_failure(149);
623 }
624 }
625
626 if (testcalls <= simulatedopcount)
627 return;
628
629 if (!quiet && ((progressinterval &&
630 testcalls % progressinterval == 0) ||
631 (debug &&
632 (monitorstart == -1 ||
633 (offset + size > monitorstart &&
634 (monitorend == -1 || offset <= monitorend))))))
635 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
636 offset, offset + size - 1, size);
637 ret = lseek(fd, (off_t)offset, SEEK_SET);
638 if (ret == (off_t)-1) {
639 prterr("dowrite: lseek");
640 report_failure(150);
641 }
642 iret = write(fd, good_buf + offset, size);
643 if (iret != size) {
644 if (iret == -1)
645 prterr("dowrite: write");
646 else
647 prt("short write: 0x%x bytes instead of 0x%x\n",
648 iret, size);
649 report_failure(151);
650 }
651 }
652
653
654 void
domapwrite(unsigned offset,unsigned size)655 domapwrite(unsigned offset, unsigned size)
656 {
657 unsigned pg_offset;
658 unsigned map_size;
659 off_t cur_filesize;
660 char *p;
661
662 offset -= offset % writebdy;
663 if (size == 0) {
664 if (!quiet && testcalls > simulatedopcount)
665 prt("skipping zero size write\n");
666 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
667 return;
668 }
669 cur_filesize = file_size;
670
671 log4(OP_MAPWRITE, offset, size, 0);
672
673 gendata(original_buf, good_buf, offset, size);
674 if (file_size < offset + size) {
675 if (file_size < offset)
676 memset(good_buf + file_size, '\0', offset - file_size);
677 file_size = offset + size;
678 if (lite) {
679 warn("Lite file size bug in fsx!");
680 report_failure(200);
681 }
682 }
683
684 if (testcalls <= simulatedopcount)
685 return;
686
687 if (!quiet && ((progressinterval &&
688 testcalls % progressinterval == 0) ||
689 (debug &&
690 (monitorstart == -1 ||
691 (offset + size > monitorstart &&
692 (monitorend == -1 || offset <= monitorend))))))
693 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
694 offset, offset + size - 1, size);
695
696 if (file_size > cur_filesize) {
697 if (ftruncate(fd, file_size) == -1) {
698 prterr("domapwrite: ftruncate");
699 exit(201);
700 }
701 }
702 pg_offset = offset & page_mask;
703 map_size = pg_offset + size;
704
705 if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
706 MAP_FILE | MAP_SHARED, fd,
707 (off_t)(offset - pg_offset))) == MAP_FAILED) {
708 prterr("domapwrite: mmap");
709 report_failure(202);
710 }
711 memcpy(p + pg_offset, good_buf + offset, size);
712 if (mapped_msync && msync(p, map_size, MS_SYNC) != 0) {
713 prterr("domapwrite: msync");
714 report_failure(203);
715 }
716
717 check_eofpage("Write", offset, p, size);
718
719 if (munmap(p, map_size) != 0) {
720 prterr("domapwrite: munmap");
721 report_failure(204);
722 }
723 }
724
725
726 void
dotruncate(unsigned size)727 dotruncate(unsigned size)
728 {
729 int oldsize = file_size;
730
731 size -= size % truncbdy;
732 if (size > biggest) {
733 biggest = size;
734 if (!quiet && testcalls > simulatedopcount)
735 prt("truncating to largest ever: 0x%x\n", size);
736 }
737
738 log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
739
740 if (size > file_size)
741 memset(good_buf + file_size, '\0', size - file_size);
742 file_size = size;
743
744 if (testcalls <= simulatedopcount)
745 return;
746
747 if ((progressinterval && testcalls % progressinterval == 0) ||
748 (debug && (monitorstart == -1 || monitorend == -1 ||
749 size <= monitorend)))
750 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
751 if (ftruncate(fd, (off_t)size) == -1) {
752 prt("ftruncate1: %x\n", size);
753 prterr("dotruncate: ftruncate");
754 report_failure(160);
755 }
756 }
757
758
759 void
writefileimage()760 writefileimage()
761 {
762 ssize_t iret;
763
764 if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
765 prterr("writefileimage: lseek");
766 report_failure(171);
767 }
768 iret = write(fd, good_buf, file_size);
769 if ((off_t)iret != file_size) {
770 if (iret == -1)
771 prterr("writefileimage: write");
772 else
773 prt("short write: 0x%x bytes instead of 0x%llx\n",
774 iret, (unsigned long long)file_size);
775 report_failure(172);
776 }
777 if (lite ? 0 : ftruncate(fd, file_size) == -1) {
778 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
779 prterr("writefileimage: ftruncate");
780 report_failure(173);
781 }
782 }
783
784
785 void
docloseopen(void)786 docloseopen(void)
787 {
788 if (testcalls <= simulatedopcount)
789 return;
790
791 if (debug)
792 prt("%lu close/open\n", testcalls);
793 if (close(fd)) {
794 prterr("docloseopen: close");
795 report_failure(180);
796 }
797 fd = open(fname, O_RDWR, 0);
798 if (fd < 0) {
799 prterr("docloseopen: open");
800 report_failure(181);
801 }
802 }
803
804
805 void
doinvl(void)806 doinvl(void)
807 {
808 char *p;
809
810 if (file_size == 0)
811 return;
812 if (testcalls <= simulatedopcount)
813 return;
814 if (debug)
815 prt("%lu msync(MS_INVALIDATE)\n", testcalls);
816
817 if ((p = (char *)mmap(0, file_size, PROT_READ | PROT_WRITE,
818 MAP_FILE | MAP_SHARED, fd, 0)) == MAP_FAILED) {
819 prterr("doinvl: mmap");
820 report_failure(205);
821 }
822
823 if (msync(p, 0, MS_SYNC | MS_INVALIDATE) != 0) {
824 prterr("doinvl: msync");
825 report_failure(206);
826 }
827
828 if (munmap(p, file_size) != 0) {
829 prterr("doinvl: munmap");
830 report_failure(207);
831 }
832 }
833
834
835 void
test(void)836 test(void)
837 {
838 unsigned long offset;
839 unsigned long size = maxoplen;
840 unsigned long rv = random();
841 unsigned long op = rv % (3 + !lite + mapped_writes);
842
843 /* turn off the map read if necessary */
844
845 if (op == 2 && !mapped_reads)
846 op = 0;
847
848 if (simulatedopcount > 0 && testcalls == simulatedopcount)
849 writefileimage();
850
851 testcalls++;
852
853 if (closeprob)
854 closeopen = (rv >> 3) < (1 << 28) / closeprob;
855 if (invlprob)
856 invl = (rv >> 3) < (1 << 28) / invlprob;
857
858 if (debugstart > 0 && testcalls >= debugstart)
859 debug = 1;
860
861 if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
862 prt("%lu...\n", testcalls);
863
864 /*
865 * READ: op = 0
866 * WRITE: op = 1
867 * MAPREAD: op = 2
868 * TRUNCATE: op = 3
869 * MAPWRITE: op = 3 or 4
870 */
871 if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
872 dotruncate(random() % maxfilelen);
873 else {
874 if (randomoplen)
875 size = random() % (maxoplen+1);
876 if (lite ? 0 : op == 3)
877 dotruncate(size);
878 else {
879 offset = random();
880 if (op == 1 || op == (lite ? 3 : 4)) {
881 offset %= maxfilelen;
882 if (offset + size > maxfilelen)
883 size = maxfilelen - offset;
884 if (op != 1)
885 domapwrite(offset, size);
886 else
887 dowrite(offset, size);
888 } else {
889 if (file_size)
890 offset %= file_size;
891 else
892 offset = 0;
893 if (offset + size > file_size)
894 size = file_size - offset;
895 if (op != 0)
896 domapread(offset, size);
897 else
898 doread(offset, size);
899 }
900 }
901 }
902 if (sizechecks && testcalls > simulatedopcount)
903 check_size();
904 if (invl)
905 doinvl();
906 if (closeopen)
907 docloseopen();
908 }
909
910
911 void
cleanup(sig)912 cleanup(sig)
913 int sig;
914 {
915 if (sig)
916 prt("signal %d\n", sig);
917 prt("testcalls = %lu\n", testcalls);
918 exit(sig);
919 }
920
921
922 void
usage(void)923 usage(void)
924 {
925 fprintf(stdout, "usage: %s",
926 "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\
927 -b opnum: beginning operation number (default 1)\n\
928 -c P: 1 in P chance of file close+open at each op (default infinity)\n\
929 -d: debug output for all operations\n\
930 -i P: 1 in P chance of calling msync(MS_INVALIDATE) (default infinity)\n\
931 -l flen: the upper bound on file size (default 262144)\n\
932 -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
933 -n: no verifications of file size\n\
934 -o oplen: the upper bound on operation size (default 65536)\n\
935 -p progressinterval: debug output at specified operation interval\n\
936 -q: quieter operation\n\
937 -r readbdy: 4096 would make reads page aligned (default 1)\n\
938 -s style: 1 gives smaller truncates (default 0)\n\
939 -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
940 -w writebdy: 4096 would make writes page aligned (default 1)\n\
941 -D startingop: debug output starting at specified operation\n\
942 -L: fsxLite - no file creations & no file size changes\n\
943 -N numops: total # operations to do (default infinity)\n\
944 -O: use oplen (see -o flag) for every op (default random)\n\
945 -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
946 -S seed: for random # generator (default 1) 0 gets timestamp\n\
947 -W: mapped write operations DISabled\n\
948 -R: mapped read operations DISabled)\n\
949 -U: msync after mapped write operations DISabled\n\
950 fname: this filename is REQUIRED (no default)\n");
951 exit(90);
952 }
953
954
955 int
getnum(char * s,char ** e)956 getnum(char *s, char **e)
957 {
958 int ret = -1;
959
960 *e = (char *) 0;
961 ret = strtol(s, e, 0);
962 if (*e)
963 switch (**e) {
964 case 'b':
965 case 'B':
966 ret *= 512;
967 *e = *e + 1;
968 break;
969 case 'k':
970 case 'K':
971 ret *= 1024;
972 *e = *e + 1;
973 break;
974 case 'm':
975 case 'M':
976 ret *= 1024*1024;
977 *e = *e + 1;
978 break;
979 case 'w':
980 case 'W':
981 ret *= 4;
982 *e = *e + 1;
983 break;
984 }
985 return (ret);
986 }
987
988
989 int
main(int argc,char ** argv)990 main(int argc, char **argv)
991 {
992 int i, ch;
993 char *endp;
994 char goodfile[1024];
995 char logfile[1024];
996
997 goodfile[0] = 0;
998 logfile[0] = 0;
999
1000 page_size = getpagesize();
1001 page_mask = page_size - 1;
1002
1003 setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
1004
1005 while ((ch = getopt(argc, argv,
1006 "b:c:di:l:m:no:p:qr:s:t:w:D:LN:OP:RS:UW")) != -1)
1007 switch (ch) {
1008 case 'b':
1009 simulatedopcount = getnum(optarg, &endp);
1010 if (!quiet)
1011 fprintf(stdout, "Will begin at operation %ld\n",
1012 simulatedopcount);
1013 if (simulatedopcount == 0)
1014 usage();
1015 simulatedopcount -= 1;
1016 break;
1017 case 'c':
1018 closeprob = getnum(optarg, &endp);
1019 if (!quiet)
1020 fprintf(stdout,
1021 "Chance of close/open is 1 in %d\n",
1022 closeprob);
1023 if (closeprob <= 0)
1024 usage();
1025 break;
1026 case 'd':
1027 debug = 1;
1028 break;
1029 case 'i':
1030 invlprob = getnum(optarg, &endp);
1031 if (!quiet)
1032 fprintf(stdout,
1033 "Chance of MS_INVALIDATE is 1 in %d\n",
1034 invlprob);
1035 if (invlprob <= 0)
1036 usage();
1037 break;
1038 case 'l':
1039 maxfilelen = getnum(optarg, &endp);
1040 if (maxfilelen <= 0)
1041 usage();
1042 break;
1043 case 'm':
1044 monitorstart = getnum(optarg, &endp);
1045 if (monitorstart < 0)
1046 usage();
1047 if (!endp || *endp++ != ':')
1048 usage();
1049 monitorend = getnum(endp, &endp);
1050 if (monitorend < 0)
1051 usage();
1052 if (monitorend == 0)
1053 monitorend = -1; /* aka infinity */
1054 debug = 1;
1055 case 'n':
1056 sizechecks = 0;
1057 break;
1058 case 'o':
1059 maxoplen = getnum(optarg, &endp);
1060 if (maxoplen <= 0)
1061 usage();
1062 break;
1063 case 'p':
1064 progressinterval = getnum(optarg, &endp);
1065 if (progressinterval < 0)
1066 usage();
1067 break;
1068 case 'q':
1069 quiet = 1;
1070 break;
1071 case 'r':
1072 readbdy = getnum(optarg, &endp);
1073 if (readbdy <= 0)
1074 usage();
1075 break;
1076 case 's':
1077 style = getnum(optarg, &endp);
1078 if (style < 0 || style > 1)
1079 usage();
1080 break;
1081 case 't':
1082 truncbdy = getnum(optarg, &endp);
1083 if (truncbdy <= 0)
1084 usage();
1085 break;
1086 case 'w':
1087 writebdy = getnum(optarg, &endp);
1088 if (writebdy <= 0)
1089 usage();
1090 break;
1091 case 'D':
1092 debugstart = getnum(optarg, &endp);
1093 if (debugstart < 1)
1094 usage();
1095 break;
1096 case 'L':
1097 lite = 1;
1098 break;
1099 case 'N':
1100 numops = getnum(optarg, &endp);
1101 if (numops < 0)
1102 usage();
1103 break;
1104 case 'O':
1105 randomoplen = 0;
1106 break;
1107 case 'P':
1108 strncpy(goodfile, optarg, sizeof(goodfile));
1109 strcat(goodfile, "/");
1110 strncpy(logfile, optarg, sizeof(logfile));
1111 strcat(logfile, "/");
1112 break;
1113 case 'R':
1114 mapped_reads = 0;
1115 break;
1116 case 'S':
1117 seed = getnum(optarg, &endp);
1118 if (seed == 0)
1119 seed = time(0) % 10000;
1120 if (!quiet)
1121 fprintf(stdout, "Seed set to %d\n", seed);
1122 if (seed < 0)
1123 usage();
1124 break;
1125 case 'W':
1126 mapped_writes = 0;
1127 if (!quiet)
1128 fprintf(stdout, "mapped writes DISABLED\n");
1129 break;
1130 case 'U':
1131 mapped_msync = 0;
1132 if (!quiet)
1133 fprintf(stdout, "mapped msync DISABLED\n");
1134 break;
1135
1136 default:
1137 usage();
1138 /* NOTREACHED */
1139 }
1140 argc -= optind;
1141 argv += optind;
1142 if (argc != 1)
1143 usage();
1144 fname = argv[0];
1145
1146 signal(SIGHUP, cleanup);
1147 signal(SIGINT, cleanup);
1148 signal(SIGPIPE, cleanup);
1149 signal(SIGALRM, cleanup);
1150 signal(SIGTERM, cleanup);
1151 signal(SIGXCPU, cleanup);
1152 signal(SIGXFSZ, cleanup);
1153 signal(SIGVTALRM, cleanup);
1154 signal(SIGUSR1, cleanup);
1155 signal(SIGUSR2, cleanup);
1156
1157 initstate(seed, state, 256);
1158 setstate(state);
1159 fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1160 if (fd < 0) {
1161 prterr(fname);
1162 exit(91);
1163 }
1164 strncat(goodfile, fname, 256);
1165 strcat (goodfile, ".fsxgood");
1166 fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1167 if (fsxgoodfd < 0) {
1168 prterr(goodfile);
1169 exit(92);
1170 }
1171 strncat(logfile, fname, 256);
1172 strcat (logfile, ".fsxlog");
1173 fsxlogf = fopen(logfile, "w");
1174 if (fsxlogf == NULL) {
1175 prterr(logfile);
1176 exit(93);
1177 }
1178 if (lite) {
1179 off_t ret;
1180 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1181 if (file_size == (off_t)-1) {
1182 prterr(fname);
1183 warn("main: lseek eof");
1184 exit(94);
1185 }
1186 ret = lseek(fd, (off_t)0, SEEK_SET);
1187 if (ret == (off_t)-1) {
1188 prterr(fname);
1189 warn("main: lseek 0");
1190 exit(95);
1191 }
1192 }
1193 original_buf = (char *) malloc(maxfilelen);
1194 for (i = 0; i < maxfilelen; i++)
1195 original_buf[i] = random() % 256;
1196 good_buf = (char *) malloc(maxfilelen);
1197 memset(good_buf, '\0', maxfilelen);
1198 temp_buf = (char *) malloc(maxoplen);
1199 memset(temp_buf, '\0', maxoplen);
1200 if (lite) { /* zero entire existing file */
1201 ssize_t written;
1202
1203 written = write(fd, good_buf, (size_t)maxfilelen);
1204 if (written != maxfilelen) {
1205 if (written == -1) {
1206 prterr(fname);
1207 warn("main: error on write");
1208 } else
1209 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1210 (unsigned)written, maxfilelen);
1211 exit(98);
1212 }
1213 } else
1214 check_trunc_hack();
1215
1216 while (numops == -1 || numops--)
1217 test();
1218
1219 if (close(fd)) {
1220 prterr("close");
1221 report_failure(99);
1222 }
1223 prt("All operations completed A-OK!\n");
1224
1225 exit(0);
1226 return 0;
1227 }
1228
1229