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MFC r258351: fsx: new option to disable msync(MS_SYNC) after each write
[FreeBSD/stable/9.git] / tools / regression / fsx / fsx.c
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
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 unsigned long   testcalls = 0;          /* calls to function "test" */
107
108 unsigned long   simulatedopcount = 0;   /* -b flag */
109 int     closeprob = 0;                  /* -c flag */
110 int     debug = 0;                      /* -d flag */
111 unsigned long   debugstart = 0;         /* -D flag */
112 unsigned long   maxfilelen = 256 * 1024;        /* -l flag */
113 int     sizechecks = 1;                 /* -n flag disables them */
114 int     maxoplen = 64 * 1024;           /* -o flag */
115 int     quiet = 0;                      /* -q flag */
116 unsigned long progressinterval = 0;     /* -p flag */
117 int     readbdy = 1;                    /* -r flag */
118 int     style = 0;                      /* -s flag */
119 int     truncbdy = 1;                   /* -t flag */
120 int     writebdy = 1;                   /* -w flag */
121 long    monitorstart = -1;              /* -m flag */
122 long    monitorend = -1;                /* -m flag */
123 int     lite = 0;                       /* -L flag */
124 long    numops = -1;                    /* -N flag */
125 int     randomoplen = 1;                /* -O flag disables it */
126 int     seed = 1;                       /* -S flag */
127 int     mapped_writes = 1;            /* -W flag disables */
128 int     mapped_reads = 1;               /* -R flag disables it */
129 int     mapped_msync = 1;             /* -U flag disables */
130 int     fsxgoodfd = 0;
131 FILE *  fsxlogf = NULL;
132 int badoff = -1;
133 int closeopen = 0;
134
135
136 void
137 vwarnc(code, fmt, ap)
138         int code;
139         const char *fmt;
140         va_list ap;
141 {
142         fprintf(stderr, "fsx: ");
143         if (fmt != NULL) {
144                 vfprintf(stderr, fmt, ap);
145                 fprintf(stderr, ": ");
146         }
147         fprintf(stderr, "%s\n", strerror(code));
148 }
149
150
151 void
152 warn(const char * fmt, ...)
153 {
154         va_list ap;
155         va_start(ap, fmt);
156         vwarnc(errno, fmt, ap);
157         va_end(ap);
158 }
159
160
161 void
162 prt(char *fmt, ...)
163 {
164         va_list args;
165
166         va_start(args, fmt);
167         vfprintf(stdout, fmt, args);
168         va_end(args);
169
170         if (fsxlogf) {
171                 va_start(args, fmt);
172                 vfprintf(fsxlogf, fmt, args);
173                 va_end(args);
174         }
175 }
176
177 void
178 prterr(char *prefix)
179 {
180         prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
181 }
182
183
184 void
185 log4(int operation, int arg0, int arg1, int arg2)
186 {
187         struct log_entry *le;
188
189         le = &oplog[logptr];
190         le->operation = operation;
191         if (closeopen)
192                 le->operation = ~ le->operation;
193         le->args[0] = arg0;
194         le->args[1] = arg1;
195         le->args[2] = arg2;
196         logptr++;
197         logcount++;
198         if (logptr >= LOGSIZE)
199                 logptr = 0;
200 }
201
202
203 void
204 logdump(void)
205 {
206         int     i, count, down;
207         struct log_entry        *lp;
208
209         prt("LOG DUMP (%d total operations):\n", logcount);
210         if (logcount < LOGSIZE) {
211                 i = 0;
212                 count = logcount;
213         } else {
214                 i = logptr;
215                 count = LOGSIZE;
216         }
217         for ( ; count > 0; count--) {
218                 int opnum;
219
220                 opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
221                 prt("%d(%d mod 256): ", opnum, opnum%256);
222                 lp = &oplog[i];
223                 if ((closeopen = lp->operation < 0))
224                         lp->operation = ~ lp->operation;
225                         
226                 switch (lp->operation) {
227                 case OP_MAPREAD:
228                         prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
229                             lp->args[0], lp->args[0] + lp->args[1] - 1,
230                             lp->args[1]);
231                         if (badoff >= lp->args[0] && badoff <
232                                                      lp->args[0] + lp->args[1])
233                                 prt("\t***RRRR***");
234                         break;
235                 case OP_MAPWRITE:
236                         prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
237                             lp->args[0], lp->args[0] + lp->args[1] - 1,
238                             lp->args[1]);
239                         if (badoff >= lp->args[0] && badoff <
240                                                      lp->args[0] + lp->args[1])
241                                 prt("\t******WWWW");
242                         break;
243                 case OP_READ:
244                         prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
245                             lp->args[0], lp->args[0] + lp->args[1] - 1,
246                             lp->args[1]);
247                         if (badoff >= lp->args[0] &&
248                             badoff < lp->args[0] + lp->args[1])
249                                 prt("\t***RRRR***");
250                         break;
251                 case OP_WRITE:
252                         prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
253                             lp->args[0], lp->args[0] + lp->args[1] - 1,
254                             lp->args[1]);
255                         if (lp->args[0] > lp->args[2])
256                                 prt(" HOLE");
257                         else if (lp->args[0] + lp->args[1] > lp->args[2])
258                                 prt(" EXTEND");
259                         if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
260                             badoff < lp->args[0] + lp->args[1])
261                                 prt("\t***WWWW");
262                         break;
263                 case OP_TRUNCATE:
264                         down = lp->args[0] < lp->args[1];
265                         prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
266                             down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
267                         if (badoff >= lp->args[!down] &&
268                             badoff < lp->args[!!down])
269                                 prt("\t******WWWW");
270                         break;
271                 case OP_SKIPPED:
272                         prt("SKIPPED (no operation)");
273                         break;
274                 default:
275                         prt("BOGUS LOG ENTRY (operation code = %d)!",
276                             lp->operation);
277                 }
278                 if (closeopen)
279                         prt("\n\t\tCLOSE/OPEN");
280                 prt("\n");
281                 i++;
282                 if (i == LOGSIZE)
283                         i = 0;
284         }
285 }
286
287
288 void
289 save_buffer(char *buffer, off_t bufferlength, int fd)
290 {
291         off_t ret;
292         ssize_t byteswritten;
293
294         if (fd <= 0 || bufferlength == 0)
295                 return;
296
297         if (bufferlength > SSIZE_MAX) {
298                 prt("fsx flaw: overflow in save_buffer\n");
299                 exit(67);
300         }
301         if (lite) {
302                 off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
303                 if (size_by_seek == (off_t)-1)
304                         prterr("save_buffer: lseek eof");
305                 else if (bufferlength > size_by_seek) {
306                         warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
307                              (unsigned long long)bufferlength);
308                         bufferlength = size_by_seek;
309                 }
310         }
311
312         ret = lseek(fd, (off_t)0, SEEK_SET);
313         if (ret == (off_t)-1)
314                 prterr("save_buffer: lseek 0");
315         
316         byteswritten = write(fd, buffer, (size_t)bufferlength);
317         if (byteswritten != bufferlength) {
318                 if (byteswritten == -1)
319                         prterr("save_buffer write");
320                 else
321                         warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
322                              (unsigned)byteswritten,
323                              (unsigned long long)bufferlength);
324         }
325 }
326
327
328 void
329 report_failure(int status)
330 {
331         logdump();
332         
333         if (fsxgoodfd) {
334                 if (good_buf) {
335                         save_buffer(good_buf, file_size, fsxgoodfd);
336                         prt("Correct content saved for comparison\n");
337                         prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
338                             fname, fname);
339                 }
340                 close(fsxgoodfd);
341         }
342         exit(status);
343 }
344
345
346 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
347                                         *(((unsigned char *)(cp)) + 1)))
348
349 void
350 check_buffers(unsigned offset, unsigned size)
351 {
352         unsigned char c, t;
353         unsigned i = 0;
354         unsigned n = 0;
355         unsigned op = 0;
356         unsigned bad = 0;
357
358         if (memcmp(good_buf + offset, temp_buf, size) != 0) {
359                 prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
360                     offset, size);
361                 prt("OFFSET\tGOOD\tBAD\tRANGE\n");
362                 while (size > 0) {
363                         c = good_buf[offset];
364                         t = temp_buf[i];
365                         if (c != t) {
366                                 if (n == 0) {
367                                         bad = short_at(&temp_buf[i]);
368                                         prt("0x%5x\t0x%04x\t0x%04x", offset,
369                                             short_at(&good_buf[offset]), bad);
370                                         op = temp_buf[offset & 1 ? i+1 : i];
371                                 }
372                                 n++;
373                                 badoff = offset;
374                         }
375                         offset++;
376                         i++;
377                         size--;
378                 }
379                 if (n) {
380                         prt("\t0x%5x\n", n);
381                         if (bad)
382                                 prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
383                         else
384                                 prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
385                 } else
386                         prt("????????????????\n");
387                 report_failure(110);
388         }
389 }
390
391
392 void
393 check_size(void)
394 {
395         struct stat     statbuf;
396         off_t   size_by_seek;
397
398         if (fstat(fd, &statbuf)) {
399                 prterr("check_size: fstat");
400                 statbuf.st_size = -1;
401         }
402         size_by_seek = lseek(fd, (off_t)0, SEEK_END);
403         if (file_size != statbuf.st_size || file_size != size_by_seek) {
404                 prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
405                     (unsigned long long)file_size,
406                     (unsigned long long)statbuf.st_size,
407                     (unsigned long long)size_by_seek);
408                 report_failure(120);
409         }
410 }
411
412
413 void
414 check_trunc_hack(void)
415 {
416         struct stat statbuf;
417
418         ftruncate(fd, (off_t)0);
419         ftruncate(fd, (off_t)100000);
420         fstat(fd, &statbuf);
421         if (statbuf.st_size != (off_t)100000) {
422                 prt("no extend on truncate! not posix!\n");
423                 exit(130);
424         }
425         ftruncate(fd, (off_t)0);
426 }
427
428
429 void
430 doread(unsigned offset, unsigned size)
431 {
432         off_t ret;
433         unsigned iret;
434
435         offset -= offset % readbdy;
436         if (size == 0) {
437                 if (!quiet && testcalls > simulatedopcount)
438                         prt("skipping zero size read\n");
439                 log4(OP_SKIPPED, OP_READ, offset, size);
440                 return;
441         }
442         if (size + offset > file_size) {
443                 if (!quiet && testcalls > simulatedopcount)
444                         prt("skipping seek/read past end of file\n");
445                 log4(OP_SKIPPED, OP_READ, offset, size);
446                 return;
447         }
448
449         log4(OP_READ, offset, size, 0);
450
451         if (testcalls <= simulatedopcount)
452                 return;
453
454         if (!quiet && ((progressinterval &&
455                         testcalls % progressinterval == 0) ||
456                        (debug &&
457                         (monitorstart == -1 ||
458                          (offset + size > monitorstart &&
459                           (monitorend == -1 || offset <= monitorend))))))
460                 prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
461                     offset, offset + size - 1, size);
462         ret = lseek(fd, (off_t)offset, SEEK_SET);
463         if (ret == (off_t)-1) {
464                 prterr("doread: lseek");
465                 report_failure(140);
466         }
467         iret = read(fd, temp_buf, size);
468         if (iret != size) {
469                 if (iret == -1)
470                         prterr("doread: read");
471                 else
472                         prt("short read: 0x%x bytes instead of 0x%x\n",
473                             iret, size);
474                 report_failure(141);
475         }
476         check_buffers(offset, size);
477 }
478
479
480 void
481 check_eofpage(char *s, unsigned offset, char *p, int size)
482 {
483         uintptr_t last_page, should_be_zero;
484
485         if (offset + size <= (file_size & ~page_mask))
486                 return;
487         /*
488          * we landed in the last page of the file
489          * test to make sure the VM system provided 0's 
490          * beyond the true end of the file mapping
491          * (as required by mmap def in 1996 posix 1003.1)
492          */
493         last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;
494
495         for (should_be_zero = last_page + (file_size & page_mask);
496              should_be_zero < last_page + page_size;
497              should_be_zero++)
498                 if (*(char *)should_be_zero) {
499                         prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
500                             s, file_size - 1, should_be_zero & page_mask,
501                             short_at(should_be_zero));
502                         report_failure(205);
503                 }
504 }
505
506
507 void
508 domapread(unsigned offset, unsigned size)
509 {
510         unsigned pg_offset;
511         unsigned map_size;
512         char    *p;
513
514         offset -= offset % readbdy;
515         if (size == 0) {
516                 if (!quiet && testcalls > simulatedopcount)
517                         prt("skipping zero size read\n");
518                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
519                 return;
520         }
521         if (size + offset > file_size) {
522                 if (!quiet && testcalls > simulatedopcount)
523                         prt("skipping seek/read past end of file\n");
524                 log4(OP_SKIPPED, OP_MAPREAD, offset, size);
525                 return;
526         }
527
528         log4(OP_MAPREAD, offset, size, 0);
529
530         if (testcalls <= simulatedopcount)
531                 return;
532
533         if (!quiet && ((progressinterval &&
534                         testcalls % progressinterval == 0) ||
535                        (debug &&
536                         (monitorstart == -1 ||
537                          (offset + size > monitorstart &&
538                           (monitorend == -1 || offset <= monitorend))))))
539                 prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
540                     offset, offset + size - 1, size);
541
542         pg_offset = offset & page_mask;
543         map_size  = pg_offset + size;
544
545         if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
546                               (off_t)(offset - pg_offset))) == (char *)-1) {
547                 prterr("domapread: mmap");
548                 report_failure(190);
549         }
550         memcpy(temp_buf, p + pg_offset, size);
551
552         check_eofpage("Read", offset, p, size);
553
554         if (munmap(p, map_size) != 0) {
555                 prterr("domapread: munmap");
556                 report_failure(191);
557         }
558
559         check_buffers(offset, size);
560 }
561
562
563 void
564 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
565 {
566         while (size--) {
567                 good_buf[offset] = testcalls % 256; 
568                 if (offset % 2)
569                         good_buf[offset] += original_buf[offset];
570                 offset++;
571         }
572 }
573
574
575 void
576 dowrite(unsigned offset, unsigned size)
577 {
578         off_t ret;
579         unsigned iret;
580
581         offset -= offset % writebdy;
582         if (size == 0) {
583                 if (!quiet && testcalls > simulatedopcount)
584                         prt("skipping zero size write\n");
585                 log4(OP_SKIPPED, OP_WRITE, offset, size);
586                 return;
587         }
588
589         log4(OP_WRITE, offset, size, file_size);
590
591         gendata(original_buf, good_buf, offset, size);
592         if (file_size < offset + size) {
593                 if (file_size < offset)
594                         memset(good_buf + file_size, '\0', offset - file_size);
595                 file_size = offset + size;
596                 if (lite) {
597                         warn("Lite file size bug in fsx!");
598                         report_failure(149);
599                 }
600         }
601
602         if (testcalls <= simulatedopcount)
603                 return;
604
605         if (!quiet && ((progressinterval &&
606                         testcalls % progressinterval == 0) ||
607                        (debug &&
608                         (monitorstart == -1 ||
609                          (offset + size > monitorstart &&
610                           (monitorend == -1 || offset <= monitorend))))))
611                 prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
612                     offset, offset + size - 1, size);
613         ret = lseek(fd, (off_t)offset, SEEK_SET);
614         if (ret == (off_t)-1) {
615                 prterr("dowrite: lseek");
616                 report_failure(150);
617         }
618         iret = write(fd, good_buf + offset, size);
619         if (iret != size) {
620                 if (iret == -1)
621                         prterr("dowrite: write");
622                 else
623                         prt("short write: 0x%x bytes instead of 0x%x\n",
624                             iret, size);
625                 report_failure(151);
626         }
627 }
628
629
630 void
631 domapwrite(unsigned offset, unsigned size)
632 {
633         unsigned pg_offset;
634         unsigned map_size;
635         off_t    cur_filesize;
636         char    *p;
637
638         offset -= offset % writebdy;
639         if (size == 0) {
640                 if (!quiet && testcalls > simulatedopcount)
641                         prt("skipping zero size write\n");
642                 log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
643                 return;
644         }
645         cur_filesize = file_size;
646
647         log4(OP_MAPWRITE, offset, size, 0);
648
649         gendata(original_buf, good_buf, offset, size);
650         if (file_size < offset + size) {
651                 if (file_size < offset)
652                         memset(good_buf + file_size, '\0', offset - file_size);
653                 file_size = offset + size;
654                 if (lite) {
655                         warn("Lite file size bug in fsx!");
656                         report_failure(200);
657                 }
658         }
659
660         if (testcalls <= simulatedopcount)
661                 return;
662
663         if (!quiet && ((progressinterval &&
664                         testcalls % progressinterval == 0) ||
665                        (debug &&
666                         (monitorstart == -1 ||
667                          (offset + size > monitorstart &&
668                           (monitorend == -1 || offset <= monitorend))))))
669                 prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
670                     offset, offset + size - 1, size);
671
672         if (file_size > cur_filesize) {
673                 if (ftruncate(fd, file_size) == -1) {
674                         prterr("domapwrite: ftruncate");
675                         exit(201);
676                 }
677         }
678         pg_offset = offset & page_mask;
679         map_size  = pg_offset + size;
680
681         if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
682                               MAP_FILE | MAP_SHARED, fd,
683                               (off_t)(offset - pg_offset))) == MAP_FAILED) {
684                 prterr("domapwrite: mmap");
685                 report_failure(202);
686         }
687         memcpy(p + pg_offset, good_buf + offset, size);
688         if (mapped_msync && msync(p, map_size, MS_SYNC) != 0) {
689                 prterr("domapwrite: msync");
690                 report_failure(203);
691         }
692
693         check_eofpage("Write", offset, p, size);
694
695         if (munmap(p, map_size) != 0) {
696                 prterr("domapwrite: munmap");
697                 report_failure(204);
698         }
699 }
700
701
702 void
703 dotruncate(unsigned size)
704 {
705         int oldsize = file_size;
706
707         size -= size % truncbdy;
708         if (size > biggest) {
709                 biggest = size;
710                 if (!quiet && testcalls > simulatedopcount)
711                         prt("truncating to largest ever: 0x%x\n", size);
712         }
713
714         log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
715
716         if (size > file_size)
717                 memset(good_buf + file_size, '\0', size - file_size);
718         file_size = size;
719
720         if (testcalls <= simulatedopcount)
721                 return;
722         
723         if ((progressinterval && testcalls % progressinterval == 0) ||
724             (debug && (monitorstart == -1 || monitorend == -1 ||
725                        size <= monitorend)))
726                 prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
727         if (ftruncate(fd, (off_t)size) == -1) {
728                 prt("ftruncate1: %x\n", size);
729                 prterr("dotruncate: ftruncate");
730                 report_failure(160);
731         }
732 }
733
734
735 void
736 writefileimage()
737 {
738         ssize_t iret;
739
740         if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
741                 prterr("writefileimage: lseek");
742                 report_failure(171);
743         }
744         iret = write(fd, good_buf, file_size);
745         if ((off_t)iret != file_size) {
746                 if (iret == -1)
747                         prterr("writefileimage: write");
748                 else
749                         prt("short write: 0x%x bytes instead of 0x%llx\n",
750                             iret, (unsigned long long)file_size);
751                 report_failure(172);
752         }
753         if (lite ? 0 : ftruncate(fd, file_size) == -1) {
754                 prt("ftruncate2: %llx\n", (unsigned long long)file_size);
755                 prterr("writefileimage: ftruncate");
756                 report_failure(173);
757         }
758 }
759
760
761 void
762 docloseopen(void)
763
764         if (testcalls <= simulatedopcount)
765                 return;
766
767         if (debug)
768                 prt("%lu close/open\n", testcalls);
769         if (close(fd)) {
770                 prterr("docloseopen: close");
771                 report_failure(180);
772         }
773         fd = open(fname, O_RDWR, 0);
774         if (fd < 0) {
775                 prterr("docloseopen: open");
776                 report_failure(181);
777         }
778 }
779
780
781 void
782 test(void)
783 {
784         unsigned long   offset;
785         unsigned long   size = maxoplen;
786         unsigned long   rv = random();
787         unsigned long   op = rv % (3 + !lite + mapped_writes);
788
789         /* turn off the map read if necessary */
790
791         if (op == 2 && !mapped_reads)
792             op = 0;
793
794         if (simulatedopcount > 0 && testcalls == simulatedopcount)
795                 writefileimage();
796
797         testcalls++;
798
799         if (closeprob)
800                 closeopen = (rv >> 3) < (1 << 28) / closeprob;
801
802         if (debugstart > 0 && testcalls >= debugstart)
803                 debug = 1;
804
805         if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
806                 prt("%lu...\n", testcalls);
807
808         /*
809          * READ:        op = 0
810          * WRITE:       op = 1
811          * MAPREAD:     op = 2
812          * TRUNCATE:    op = 3
813          * MAPWRITE:    op = 3 or 4
814          */
815         if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
816                 dotruncate(random() % maxfilelen);
817         else {
818                 if (randomoplen)
819                         size = random() % (maxoplen+1);
820                 if (lite ? 0 : op == 3)
821                         dotruncate(size);
822                 else {
823                         offset = random();
824                         if (op == 1 || op == (lite ? 3 : 4)) {
825                                 offset %= maxfilelen;
826                                 if (offset + size > maxfilelen)
827                                         size = maxfilelen - offset;
828                                 if (op != 1)
829                                         domapwrite(offset, size);
830                                 else
831                                         dowrite(offset, size);
832                         } else {
833                                 if (file_size)
834                                         offset %= file_size;
835                                 else
836                                         offset = 0;
837                                 if (offset + size > file_size)
838                                         size = file_size - offset;
839                                 if (op != 0)
840                                         domapread(offset, size);
841                                 else
842                                         doread(offset, size);
843                         }
844                 }
845         }
846         if (sizechecks && testcalls > simulatedopcount)
847                 check_size();
848         if (closeopen)
849                 docloseopen();
850 }
851
852
853 void
854 cleanup(sig)
855         int     sig;
856 {
857         if (sig)
858                 prt("signal %d\n", sig);
859         prt("testcalls = %lu\n", testcalls);
860         exit(sig);
861 }
862
863
864 void
865 usage(void)
866 {
867         fprintf(stdout, "usage: %s",
868                 "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\
869         -b opnum: beginning operation number (default 1)\n\
870         -c P: 1 in P chance of file close+open at each op (default infinity)\n\
871         -d: debug output for all operations\n\
872         -l flen: the upper bound on file size (default 262144)\n\
873         -m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
874         -n: no verifications of file size\n\
875         -o oplen: the upper bound on operation size (default 65536)\n\
876         -p progressinterval: debug output at specified operation interval\n\
877         -q: quieter operation\n\
878         -r readbdy: 4096 would make reads page aligned (default 1)\n\
879         -s style: 1 gives smaller truncates (default 0)\n\
880         -t truncbdy: 4096 would make truncates page aligned (default 1)\n\
881         -w writebdy: 4096 would make writes page aligned (default 1)\n\
882         -D startingop: debug output starting at specified operation\n\
883         -L: fsxLite - no file creations & no file size changes\n\
884         -N numops: total # operations to do (default infinity)\n\
885         -O: use oplen (see -o flag) for every op (default random)\n\
886         -P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
887         -S seed: for random # generator (default 1) 0 gets timestamp\n\
888         -W: mapped write operations DISabled\n\
889         -R: mapped read operations DISabled)\n\
890         -U: msync after mapped write operations DISabled\n\
891         fname: this filename is REQUIRED (no default)\n");
892         exit(90);
893 }
894
895
896 int
897 getnum(char *s, char **e)
898 {
899         int ret = -1;
900
901         *e = (char *) 0;
902         ret = strtol(s, e, 0);
903         if (*e)
904                 switch (**e) {
905                 case 'b':
906                 case 'B':
907                         ret *= 512;
908                         *e = *e + 1;
909                         break;
910                 case 'k':
911                 case 'K':
912                         ret *= 1024;
913                         *e = *e + 1;
914                         break;
915                 case 'm':
916                 case 'M':
917                         ret *= 1024*1024;
918                         *e = *e + 1;
919                         break;
920                 case 'w':
921                 case 'W':
922                         ret *= 4;
923                         *e = *e + 1;
924                         break;
925                 }
926         return (ret);
927 }
928
929
930 int
931 main(int argc, char **argv)
932 {
933         int     i, ch;
934         char    *endp;
935         char goodfile[1024];
936         char logfile[1024];
937
938         goodfile[0] = 0;
939         logfile[0] = 0;
940
941         page_size = getpagesize();
942         page_mask = page_size - 1;
943
944         setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
945
946         while ((ch = getopt(argc, argv,
947             "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:UW")) != -1)
948                 switch (ch) {
949                 case 'b':
950                         simulatedopcount = getnum(optarg, &endp);
951                         if (!quiet)
952                                 fprintf(stdout, "Will begin at operation %ld\n",
953                                         simulatedopcount);
954                         if (simulatedopcount == 0)
955                                 usage();
956                         simulatedopcount -= 1;
957                         break;
958                 case 'c':
959                         closeprob = getnum(optarg, &endp);
960                         if (!quiet)
961                                 fprintf(stdout,
962                                         "Chance of close/open is 1 in %d\n",
963                                         closeprob);
964                         if (closeprob <= 0)
965                                 usage();
966                         break;
967                 case 'd':
968                         debug = 1;
969                         break;
970                 case 'l':
971                         maxfilelen = getnum(optarg, &endp);
972                         if (maxfilelen <= 0)
973                                 usage();
974                         break;
975                 case 'm':
976                         monitorstart = getnum(optarg, &endp);
977                         if (monitorstart < 0)
978                                 usage();
979                         if (!endp || *endp++ != ':')
980                                 usage();
981                         monitorend = getnum(endp, &endp);
982                         if (monitorend < 0)
983                                 usage();
984                         if (monitorend == 0)
985                                 monitorend = -1; /* aka infinity */
986                         debug = 1;
987                 case 'n':
988                         sizechecks = 0;
989                         break;
990                 case 'o':
991                         maxoplen = getnum(optarg, &endp);
992                         if (maxoplen <= 0)
993                                 usage();
994                         break;
995                 case 'p':
996                         progressinterval = getnum(optarg, &endp);
997                         if (progressinterval < 0)
998                                 usage();
999                         break;
1000                 case 'q':
1001                         quiet = 1;
1002                         break;
1003                 case 'r':
1004                         readbdy = getnum(optarg, &endp);
1005                         if (readbdy <= 0)
1006                                 usage();
1007                         break;
1008                 case 's':
1009                         style = getnum(optarg, &endp);
1010                         if (style < 0 || style > 1)
1011                                 usage();
1012                         break;
1013                 case 't':
1014                         truncbdy = getnum(optarg, &endp);
1015                         if (truncbdy <= 0)
1016                                 usage();
1017                         break;
1018                 case 'w':
1019                         writebdy = getnum(optarg, &endp);
1020                         if (writebdy <= 0)
1021                                 usage();
1022                         break;
1023                 case 'D':
1024                         debugstart = getnum(optarg, &endp);
1025                         if (debugstart < 1)
1026                                 usage();
1027                         break;
1028                 case 'L':
1029                         lite = 1;
1030                         break;
1031                 case 'N':
1032                         numops = getnum(optarg, &endp);
1033                         if (numops < 0)
1034                                 usage();
1035                         break;
1036                 case 'O':
1037                         randomoplen = 0;
1038                         break;
1039                 case 'P':
1040                         strncpy(goodfile, optarg, sizeof(goodfile));
1041                         strcat(goodfile, "/");
1042                         strncpy(logfile, optarg, sizeof(logfile));
1043                         strcat(logfile, "/");
1044                         break;
1045                 case 'R':
1046                         mapped_reads = 0;
1047                         break;
1048                 case 'S':
1049                         seed = getnum(optarg, &endp);
1050                         if (seed == 0)
1051                                 seed = time(0) % 10000;
1052                         if (!quiet)
1053                                 fprintf(stdout, "Seed set to %d\n", seed);
1054                         if (seed < 0)
1055                                 usage();
1056                         break;
1057                 case 'W':
1058                         mapped_writes = 0;
1059                         if (!quiet)
1060                                 fprintf(stdout, "mapped writes DISABLED\n");
1061                         break;
1062                 case 'U':
1063                         mapped_msync = 0;
1064                         if (!quiet)
1065                                 fprintf(stdout, "mapped msync DISABLED\n");
1066                         break;
1067
1068                 default:
1069                         usage();
1070                         /* NOTREACHED */
1071                 }
1072         argc -= optind;
1073         argv += optind;
1074         if (argc != 1)
1075                 usage();
1076         fname = argv[0];
1077
1078         signal(SIGHUP,  cleanup);
1079         signal(SIGINT,  cleanup);
1080         signal(SIGPIPE, cleanup);
1081         signal(SIGALRM, cleanup);
1082         signal(SIGTERM, cleanup);
1083         signal(SIGXCPU, cleanup);
1084         signal(SIGXFSZ, cleanup);
1085         signal(SIGVTALRM,       cleanup);
1086         signal(SIGUSR1, cleanup);
1087         signal(SIGUSR2, cleanup);
1088
1089         initstate(seed, state, 256);
1090         setstate(state);
1091         fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1092         if (fd < 0) {
1093                 prterr(fname);
1094                 exit(91);
1095         }
1096         strncat(goodfile, fname, 256);
1097         strcat (goodfile, ".fsxgood");
1098         fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1099         if (fsxgoodfd < 0) {
1100                 prterr(goodfile);
1101                 exit(92);
1102         }
1103         strncat(logfile, fname, 256);
1104         strcat (logfile, ".fsxlog");
1105         fsxlogf = fopen(logfile, "w");
1106         if (fsxlogf == NULL) {
1107                 prterr(logfile);
1108                 exit(93);
1109         }
1110         if (lite) {
1111                 off_t ret;
1112                 file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1113                 if (file_size == (off_t)-1) {
1114                         prterr(fname);
1115                         warn("main: lseek eof");
1116                         exit(94);
1117                 }
1118                 ret = lseek(fd, (off_t)0, SEEK_SET);
1119                 if (ret == (off_t)-1) {
1120                         prterr(fname);
1121                         warn("main: lseek 0");
1122                         exit(95);
1123                 }
1124         }
1125         original_buf = (char *) malloc(maxfilelen);
1126         for (i = 0; i < maxfilelen; i++)
1127                 original_buf[i] = random() % 256;
1128         good_buf = (char *) malloc(maxfilelen);
1129         memset(good_buf, '\0', maxfilelen);
1130         temp_buf = (char *) malloc(maxoplen);
1131         memset(temp_buf, '\0', maxoplen);
1132         if (lite) {     /* zero entire existing file */
1133                 ssize_t written;
1134
1135                 written = write(fd, good_buf, (size_t)maxfilelen);
1136                 if (written != maxfilelen) {
1137                         if (written == -1) {
1138                                 prterr(fname);
1139                                 warn("main: error on write");
1140                         } else
1141                                 warn("main: short write, 0x%x bytes instead of 0x%x\n",
1142                                      (unsigned)written, maxfilelen);
1143                         exit(98);
1144                 }
1145         } else 
1146                 check_trunc_hack();
1147
1148         while (numops == -1 || numops--)
1149                 test();
1150
1151         if (close(fd)) {
1152                 prterr("close");
1153                 report_failure(99);
1154         }
1155         prt("All operations completed A-OK!\n");
1156
1157         exit(0);
1158         return 0;
1159 }
1160