fsx.c revision 88242 
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 1.1 (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.apple.com/publicsource 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 * $FreeBSD: head/tools/regression/fsx/fsx.c 88242 2001-12-20 04:15:57Z jkh $
35 */
36
37#include <sys/types.h>
38#include <sys/stat.h>
39#ifdef _UWIN
40# include <sys/param.h>
41# include <limits.h>
42# include <time.h>
43# include <strings.h>
44#endif
45#include <fcntl.h>
46#include <sys/mman.h>
47#ifndef MAP_FILE
48# define MAP_FILE 0
49#endif
50#include <limits.h>
51#include <signal.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56#include <stdarg.h>
57#include <errno.h>
58
59#define NUMPRINTCOLUMNS 32	/* # columns of data to print on each line */
60
61/*
62 *	A log entry is an operation and a bunch of arguments.
63 */
64
65struct log_entry {
66	int	operation;
67	int	args[3];
68};
69
70#define	LOGSIZE	1000
71
72struct log_entry	oplog[LOGSIZE];	/* the log */
73int			logptr = 0;	/* current position in log */
74int			logcount = 0;	/* total ops */
75
76/*
77 *	Define operations
78 */
79
80#define	OP_READ		1
81#define OP_WRITE	2
82#define OP_TRUNCATE	3
83#define OP_CLOSEOPEN	4
84#define OP_MAPREAD	5
85#define OP_MAPWRITE	6
86#define OP_SKIPPED	7
87
88int page_size;
89int page_mask;
90
91char	*original_buf;			/* a pointer to the original data */
92char	*good_buf;			/* a pointer to the correct data */
93char	*temp_buf;			/* a pointer to the current data */
94char	*fname;				/* name of our test file */
95int	fd;				/* fd for our test file */
96
97off_t		file_size = 0;
98off_t		biggest = 0;
99char		state[256];
100unsigned long	testcalls = 0;		/* calls to function "test" */
101
102unsigned long	simulatedopcount = 0;	/* -b flag */
103int	closeprob = 0;			/* -c flag */
104int	debug = 0;			/* -d flag */
105unsigned long	debugstart = 0;		/* -D flag */
106unsigned long	maxfilelen = 256 * 1024;	/* -l flag */
107int	sizechecks = 1;			/* -n flag disables them */
108int	maxoplen = 64 * 1024;		/* -o flag */
109int	quiet = 0;			/* -q flag */
110unsigned long progressinterval = 0;	/* -p flag */
111int	readbdy = 1;			/* -r flag */
112int	style = 0;			/* -s flag */
113int	truncbdy = 1;			/* -t flag */
114int	writebdy = 1;			/* -w flag */
115long	monitorstart = -1;		/* -m flag */
116long	monitorend = -1;		/* -m flag */
117int	lite = 0;			/* -L flag */
118long	numops = -1;			/* -N flag */
119int	randomoplen = 1;		/* -O flag disables it */
120int	seed = 1;			/* -S flag */
121int     mapped_writes = 1;              /* -W flag disables */
122int 	mapped_reads = 1;		/* -R flag disables it */
123int	fsxgoodfd = 0;
124FILE *	fsxlogf = NULL;
125int badoff = -1;
126int closeopen = 0;
127
128
129void
130vwarnc(code, fmt, ap)
131	int code;
132	const char *fmt;
133	va_list ap;
134{
135	fprintf(stderr, "fsx: ");
136	if (fmt != NULL) {
137		vfprintf(stderr, fmt, ap);
138		fprintf(stderr, ": ");
139	}
140	fprintf(stderr, "%s\n", strerror(code));
141}
142
143
144void
145warn(const char * fmt, ...)
146{
147	va_list ap;
148	va_start(ap, fmt);
149	vwarnc(errno, fmt, ap);
150	va_end(ap);
151}
152
153
154void
155prt(char *fmt, ...)
156{
157	va_list args;
158
159	va_start(args, fmt);
160	vfprintf(stdout, fmt, args);
161	if (fsxlogf)
162		vfprintf(fsxlogf, fmt, args);
163	va_end(args);
164}
165
166void
167prterr(char *prefix)
168{
169	prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
170}
171
172
173void
174log4(int operation, int arg0, int arg1, int arg2)
175{
176	struct log_entry *le;
177
178	le = &oplog[logptr];
179	le->operation = operation;
180	if (closeopen)
181		le->operation = ~ le->operation;
182	le->args[0] = arg0;
183	le->args[1] = arg1;
184	le->args[2] = arg2;
185	logptr++;
186	logcount++;
187	if (logptr >= LOGSIZE)
188		logptr = 0;
189}
190
191
192void
193logdump(void)
194{
195	int	i, count, down;
196	struct log_entry	*lp;
197
198	prt("LOG DUMP (%d total operations):\n", logcount);
199	if (logcount < LOGSIZE) {
200		i = 0;
201		count = logcount;
202	} else {
203		i = logptr;
204		count = LOGSIZE;
205	}
206	for ( ; count > 0; count--) {
207		int opnum;
208
209		opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
210		prt("%d(%d mod 256): ", opnum, opnum%256);
211		lp = &oplog[i];
212		if ((closeopen = lp->operation < 0))
213			lp->operation = ~ lp->operation;
214
215		switch (lp->operation) {
216		case OP_MAPREAD:
217			prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
218			    lp->args[0], lp->args[0] + lp->args[1] - 1,
219			    lp->args[1]);
220			if (badoff >= lp->args[0] && badoff <
221						     lp->args[0] + lp->args[1])
222				prt("\t***RRRR***");
223			break;
224		case OP_MAPWRITE:
225			prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
226			    lp->args[0], lp->args[0] + lp->args[1] - 1,
227			    lp->args[1]);
228			if (badoff >= lp->args[0] && badoff <
229						     lp->args[0] + lp->args[1])
230				prt("\t******WWWW");
231			break;
232		case OP_READ:
233			prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
234			    lp->args[0], lp->args[0] + lp->args[1] - 1,
235			    lp->args[1]);
236			if (badoff >= lp->args[0] &&
237			    badoff < lp->args[0] + lp->args[1])
238				prt("\t***RRRR***");
239			break;
240		case OP_WRITE:
241			prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
242			    lp->args[0], lp->args[0] + lp->args[1] - 1,
243			    lp->args[1]);
244			if (lp->args[0] > lp->args[2])
245				prt(" HOLE");
246			else if (lp->args[0] + lp->args[1] > lp->args[2])
247				prt(" EXTEND");
248			if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
249			    badoff < lp->args[0] + lp->args[1])
250				prt("\t***WWWW");
251			break;
252		case OP_TRUNCATE:
253			down = lp->args[0] < lp->args[1];
254			prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
255			    down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
256			if (badoff >= lp->args[!down] &&
257			    badoff < lp->args[!!down])
258				prt("\t******WWWW");
259			break;
260		case OP_SKIPPED:
261			prt("SKIPPED (no operation)");
262			break;
263		default:
264			prt("BOGUS LOG ENTRY (operation code = %d)!",
265			    lp->operation);
266		}
267		if (closeopen)
268			prt("\n\t\tCLOSE/OPEN");
269		prt("\n");
270		i++;
271		if (i == LOGSIZE)
272			i = 0;
273	}
274}
275
276
277void
278save_buffer(char *buffer, off_t bufferlength, int fd)
279{
280	off_t ret;
281	ssize_t byteswritten;
282
283	if (fd <= 0 || bufferlength == 0)
284		return;
285
286	if (bufferlength > SSIZE_MAX) {
287		prt("fsx flaw: overflow in save_buffer\n");
288		exit(67);
289	}
290	if (lite) {
291		off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
292		if (size_by_seek == (off_t)-1)
293			prterr("save_buffer: lseek eof");
294		else if (bufferlength > size_by_seek) {
295			warn("save_buffer: .fsxgood file too short... will
296save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
297			     (unsigned long long)bufferlength);
298			bufferlength = size_by_seek;
299		}
300	}
301
302	ret = lseek(fd, (off_t)0, SEEK_SET);
303	if (ret == (off_t)-1)
304		prterr("save_buffer: lseek 0");
305
306	byteswritten = write(fd, buffer, (size_t)bufferlength);
307	if (byteswritten != bufferlength) {
308		if (byteswritten == -1)
309			prterr("save_buffer write");
310		else
311			warn("save_buffer: short write, 0x%x bytes instead
312of 0x%llx\n",
313			     (unsigned)byteswritten,
314			     (unsigned long long)bufferlength);
315	}
316}
317
318
319void
320report_failure(int status)
321{
322	logdump();
323
324	if (fsxgoodfd) {
325		if (good_buf) {
326			save_buffer(good_buf, file_size, fsxgoodfd);
327			prt("Correct content saved for comparison\n");
328			prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
329			    fname, fname);
330		}
331		close(fsxgoodfd);
332	}
333	exit(status);
334}
335
336
337#define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
338				        *(((unsigned char *)(cp)) + 1)))
339
340void
341check_buffers(unsigned offset, unsigned size)
342{
343	unsigned char c, t;
344	unsigned i = 0;
345	unsigned n = 0;
346	unsigned op = 0;
347	unsigned bad = 0;
348
349	if (memcmp(good_buf + offset, temp_buf, size) != 0) {
350		prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
351		    offset, size);
352		prt("OFFSET\tGOOD\tBAD\tRANGE\n");
353		while (size > 0) {
354			c = good_buf[offset];
355			t = temp_buf[i];
356			if (c != t) {
357			        if (n == 0) {
358					bad = short_at(&temp_buf[i]);
359				        prt("0x%5x\t0x%04x\t0x%04x", offset,
360				            short_at(&good_buf[offset]), bad);
361					op = temp_buf[offset & 1 ? i+1 : i];
362				}
363				n++;
364				badoff = offset;
365			}
366			offset++;
367			i++;
368			size--;
369		}
370		if (n) {
371		        prt("\t0x%5x\n", n);
372			if (bad)
373				prt("operation# (mod 256) for the bad data
374may be %u\n", ((unsigned)op & 0xff));
375			else
376				prt("operation# (mod 256) for the bad data
377unknown, check HOLE and EXTEND ops\n");
378		} else
379		        prt("????????????????\n");
380		report_failure(110);
381	}
382}
383
384
385void
386check_size(void)
387{
388	struct stat	statbuf;
389	off_t	size_by_seek;
390
391	if (fstat(fd, &statbuf)) {
392		prterr("check_size: fstat");
393		statbuf.st_size = -1;
394	}
395	size_by_seek = lseek(fd, (off_t)0, SEEK_END);
396	if (file_size != statbuf.st_size || file_size != size_by_seek) {
397		prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
398		    (unsigned long long)file_size,
399		    (unsigned long long)statbuf.st_size,
400		    (unsigned long long)size_by_seek);
401		report_failure(120);
402	}
403}
404
405
406void
407check_trunc_hack(void)
408{
409	struct stat statbuf;
410
411	ftruncate(fd, (off_t)0);
412	ftruncate(fd, (off_t)100000);
413	fstat(fd, &statbuf);
414	if (statbuf.st_size != (off_t)100000) {
415		prt("no extend on truncate! not posix!\n");
416		exit(130);
417	}
418	ftruncate(fd, 0);
419}
420
421
422void
423doread(unsigned offset, unsigned size)
424{
425	off_t ret;
426	unsigned iret;
427
428	offset -= offset % readbdy;
429	if (size == 0) {
430		if (!quiet && testcalls > simulatedopcount)
431			prt("skipping zero size read\n");
432		log4(OP_SKIPPED, OP_READ, offset, size);
433		return;
434	}
435	if (size + offset > file_size) {
436		if (!quiet && testcalls > simulatedopcount)
437			prt("skipping seek/read past end of file\n");
438		log4(OP_SKIPPED, OP_READ, offset, size);
439		return;
440	}
441
442	log4(OP_READ, offset, size, 0);
443
444	if (testcalls <= simulatedopcount)
445		return;
446
447	if (!quiet && ((progressinterval &&
448			testcalls % progressinterval == 0) ||
449		       (debug &&
450		        (monitorstart == -1 ||
451			 (offset + size > monitorstart &&
452			  (monitorend == -1 || offset <= monitorend))))))
453		prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
454		    offset, offset + size - 1, size);
455	ret = lseek(fd, (off_t)offset, SEEK_SET);
456	if (ret == (off_t)-1) {
457		prterr("doread: lseek");
458		report_failure(140);
459	}
460	iret = read(fd, temp_buf, size);
461	if (iret != size) {
462		if (iret == -1)
463			prterr("doread: read");
464		else
465			prt("short read: 0x%x bytes instead of 0x%x\n",
466			    iret, size);
467		report_failure(141);
468	}
469	check_buffers(offset, size);
470}
471
472
473void
474domapread(unsigned offset, unsigned size)
475{
476	unsigned pg_offset;
477	unsigned map_size;
478	char    *p;
479
480	offset -= offset % readbdy;
481	if (size == 0) {
482		if (!quiet && testcalls > simulatedopcount)
483			prt("skipping zero size read\n");
484		log4(OP_SKIPPED, OP_MAPREAD, offset, size);
485		return;
486	}
487	if (size + offset > file_size) {
488		if (!quiet && testcalls > simulatedopcount)
489			prt("skipping seek/read past end of file\n");
490		log4(OP_SKIPPED, OP_MAPREAD, offset, size);
491		return;
492	}
493
494	log4(OP_MAPREAD, offset, size, 0);
495
496	if (testcalls <= simulatedopcount)
497		return;
498
499	if (!quiet && ((progressinterval &&
500			testcalls % progressinterval == 0) ||
501		       (debug &&
502		        (monitorstart == -1 ||
503			 (offset + size > monitorstart &&
504			  (monitorend == -1 || offset <= monitorend))))))
505		prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
506		    offset, offset + size - 1, size);
507
508	pg_offset = offset & page_mask;
509	map_size  = pg_offset + size;
510
511	if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE |
512MAP_SHARED, fd,
513			      (off_t)(offset - pg_offset))) == (char *)-1) {
514	        prterr("domapread: mmap");
515		report_failure(190);
516	}
517	memcpy(temp_buf, p + pg_offset, size);
518	if (munmap(p, map_size) != 0) {
519		prterr("domapread: munmap");
520		report_failure(191);
521	}
522
523	check_buffers(offset, size);
524}
525
526
527void
528gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
529{
530	while (size--) {
531		good_buf[offset] = testcalls % 256;
532		if (offset % 2)
533			good_buf[offset] += original_buf[offset];
534		offset++;
535	}
536}
537
538
539void
540dowrite(unsigned offset, unsigned size)
541{
542	off_t ret;
543	unsigned iret;
544
545	offset -= offset % writebdy;
546	if (size == 0) {
547		if (!quiet && testcalls > simulatedopcount)
548			prt("skipping zero size write\n");
549		log4(OP_SKIPPED, OP_WRITE, offset, size);
550		return;
551	}
552
553	log4(OP_WRITE, offset, size, file_size);
554
555	gendata(original_buf, good_buf, offset, size);
556	if (file_size < offset + size) {
557		if (file_size < offset)
558			memset(good_buf + file_size, '\0', offset - file_size);
559		file_size = offset + size;
560		if (lite) {
561			warn("Lite file size bug in fsx!");
562			report_failure(149);
563		}
564	}
565
566	if (testcalls <= simulatedopcount)
567		return;
568
569	if (!quiet && ((progressinterval &&
570			testcalls % progressinterval == 0) ||
571		       (debug &&
572		        (monitorstart == -1 ||
573			 (offset + size > monitorstart &&
574			  (monitorend == -1 || offset <= monitorend))))))
575		prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
576		    offset, offset + size - 1, size);
577	ret = lseek(fd, (off_t)offset, SEEK_SET);
578	if (ret == (off_t)-1) {
579		prterr("dowrite: lseek");
580		report_failure(150);
581	}
582	iret = write(fd, good_buf + offset, size);
583	if (iret != size) {
584		if (iret == -1)
585			prterr("dowrite: write");
586		else
587			prt("short write: 0x%x bytes instead of 0x%x\n",
588			    iret, size);
589		report_failure(151);
590	}
591}
592
593
594void
595domapwrite(unsigned offset, unsigned size)
596{
597	unsigned pg_offset;
598	unsigned map_size;
599	off_t    cur_filesize;
600	char    *p;
601
602	offset -= offset % writebdy;
603	if (size == 0) {
604		if (!quiet && testcalls > simulatedopcount)
605			prt("skipping zero size write\n");
606		log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
607		return;
608	}
609	cur_filesize = file_size;
610
611	log4(OP_MAPWRITE, offset, size, 0);
612
613	gendata(original_buf, good_buf, offset, size);
614	if (file_size < offset + size) {
615		if (file_size < offset)
616			memset(good_buf + file_size, '\0', offset - file_size);
617		file_size = offset + size;
618		if (lite) {
619			warn("Lite file size bug in fsx!");
620			report_failure(200);
621		}
622	}
623
624	if (testcalls <= simulatedopcount)
625		return;
626
627	if (!quiet && ((progressinterval &&
628			testcalls % progressinterval == 0) ||
629		       (debug &&
630		        (monitorstart == -1 ||
631			 (offset + size > monitorstart &&
632			  (monitorend == -1 || offset <= monitorend))))))
633		prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
634		    offset, offset + size - 1, size);
635
636	if (file_size > cur_filesize) {
637	        if (ftruncate(fd, file_size) == -1) {
638		        prterr("domapwrite: ftruncate");
639			exit(201);
640		}
641	}
642	pg_offset = offset & page_mask;
643	map_size  = pg_offset + size;
644
645	if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
646			      MAP_FILE | MAP_SHARED, fd,
647			      (off_t)(offset - pg_offset))) == (char *)-1) {
648	        prterr("domapwrite: mmap");
649		report_failure(202);
650	}
651	memcpy(p + pg_offset, good_buf + offset, size);
652	if (msync(p, map_size, 0) != 0) {
653		prterr("domapwrite: msync");
654		report_failure(203);
655	}
656	if (munmap(p, map_size) != 0) {
657		prterr("domapwrite: munmap");
658		report_failure(204);
659	}
660}
661
662
663void
664dotruncate(unsigned size)
665{
666	int oldsize = file_size;
667
668	size -= size % truncbdy;
669	if (size > biggest) {
670		biggest = size;
671		if (!quiet && testcalls > simulatedopcount)
672			prt("truncating to largest ever: 0x%x\n", size);
673	}
674
675	log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
676
677	if (size > file_size)
678		memset(good_buf + file_size, '\0', size - file_size);
679	file_size = size;
680
681	if (testcalls <= simulatedopcount)
682		return;
683
684	if ((progressinterval && testcalls % progressinterval == 0) ||
685	    (debug && (monitorstart == -1 || monitorend == -1 ||
686		       size <= monitorend)))
687		prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize,
688size);
689	if (ftruncate(fd, (off_t)size) == -1) {
690	        prt("ftruncate1: %x\n", size);
691		prterr("dotruncate: ftruncate");
692		report_failure(160);
693	}
694}
695
696
697void
698writefileimage()
699{
700	ssize_t iret;
701
702	if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
703		prterr("writefileimage: lseek");
704		report_failure(171);
705	}
706	iret = write(fd, good_buf, file_size);
707	if ((off_t)iret != file_size) {
708		if (iret == -1)
709			prterr("writefileimage: write");
710		else
711			prt("short write: 0x%x bytes instead of 0x%llx\n",
712			    iret, (unsigned long long)file_size);
713		report_failure(172);
714	}
715	if (lite ? 0 : ftruncate(fd, file_size) == -1) {
716	        prt("ftruncate2: %llx\n", (unsigned long long)file_size);
717		prterr("writefileimage: ftruncate");
718		report_failure(173);
719	}
720}
721
722
723void
724docloseopen(void)
725{
726	if (testcalls <= simulatedopcount)
727		return;
728
729	if (debug)
730		prt("%lu close/open\n", testcalls);
731	if (close(fd)) {
732		prterr("docloseopen: close");
733		report_failure(180);
734	}
735	fd = open(fname, O_RDWR, 0);
736	if (fd < 0) {
737		prterr("docloseopen: open");
738		report_failure(181);
739	}
740}
741
742
743void
744test(void)
745{
746	unsigned long	offset;
747	unsigned long	size = maxoplen;
748	unsigned long	rv = random();
749	unsigned long	op = rv % (3 + !lite + mapped_writes);
750
751        /* turn off the map read if necessary */
752
753        if (op == 2 && !mapped_reads)
754            op = 0;
755
756	if (simulatedopcount > 0 && testcalls == simulatedopcount)
757		writefileimage();
758
759	testcalls++;
760
761	if (closeprob)
762		closeopen = (rv >> 3) < (1 << 28) / closeprob;
763
764	if (debugstart > 0 && testcalls >= debugstart)
765		debug = 1;
766
767	if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
768		prt("%lu...\n", testcalls);
769
770	/*
771	 * READ:	op = 0
772	 * WRITE:	op = 1
773	 * MAPREAD:     op = 2
774	 * TRUNCATE:	op = 3
775	 * MAPWRITE:    op = 3 or 4
776	 */
777	if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */
778		dotruncate(random() % maxfilelen);
779	else {
780		if (randomoplen)
781			size = random() % (maxoplen+1);
782		if (lite ? 0 : op == 3)
783			dotruncate(size);
784		else {
785			offset = random();
786			if (op == 1 || op == (lite ? 3 : 4)) {
787				offset %= maxfilelen;
788				if (offset + size > maxfilelen)
789					size = maxfilelen - offset;
790				if (op != 1)
791					domapwrite(offset, size);
792				else
793					dowrite(offset, size);
794			} else {
795				if (file_size)
796					offset %= file_size;
797				else
798					offset = 0;
799				if (offset + size > file_size)
800					size = file_size - offset;
801				if (op != 0)
802					domapread(offset, size);
803				else
804					doread(offset, size);
805			}
806		}
807	}
808	if (sizechecks && testcalls > simulatedopcount)
809		check_size();
810	if (closeopen)
811		docloseopen();
812}
813
814
815void
816cleanup(sig)
817	int	sig;
818{
819	if (sig)
820		prt("signal %d\n", sig);
821	prt("testcalls = %lu\n", testcalls);
822	exit(sig);
823}
824
825
826void
827usage(void)
828{
829	fprintf(stdout, "usage: %s",
830		"fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m
831start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t
832truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed]
833fname\n\
834	-b opnum: beginning operation number (default 1)\n\
835	-c P: 1 in P chance of file close+open at each op (default infinity)\n\
836	-d: debug output for all operations\n\
837	-l flen: the upper bound on file size (default 262144)\n\
838	-m startop:endop: monitor (print debug output) specified byte range
839(default 0:infinity)\n\
840	-n: no verifications of file size\n\
841	-o oplen: the upper bound on operation size (default 65536)\n\
842	-p progressinterval: debug output at specified operation interval\n\
843	-q: quieter operation\n\
844	-r readbdy: 4096 would make reads page aligned (default 1)\n\
845	-s style: 1 gives smaller truncates (default 0)\n\
846	-t truncbdy: 4096 would make truncates page aligned (default 1)\n\
847	-w writebdy: 4096 would make writes page aligned (default 1)\n\
848	-D startingop: debug output starting at specified operation\n\
849	-L: fsxLite - no file creations & no file size changes\n\
850	-N numops: total # operations to do (default infinity)\n\
851	-O: use oplen (see -o flag) for every op (default random)\n\
852	-P: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
853	-S seed: for random # generator (default 1) 0 gets timestamp\n\
854	-W: mapped write operations DISabled\n\
855        -R: read() system calls only (mapped reads disabled)\n\
856	fname: this filename is REQUIRED (no default)\n");
857	exit(90);
858}
859
860
861int
862getnum(char *s, char **e)
863{
864	int ret = -1;
865
866	*e = (char *) 0;
867	ret = strtol(s, e, 0);
868	if (*e)
869		switch (**e) {
870		case 'b':
871		case 'B':
872			ret *= 512;
873			*e = *e + 1;
874			break;
875		case 'k':
876		case 'K':
877			ret *= 1024;
878			*e = *e + 1;
879			break;
880		case 'm':
881		case 'M':
882			ret *= 1024*1024;
883			*e = *e + 1;
884			break;
885		case 'w':
886		case 'W':
887			ret *= 4;
888			*e = *e + 1;
889			break;
890		}
891	return (ret);
892}
893
894
895int
896main(int argc, char **argv)
897{
898	int	i, style, ch;
899	char	*endp;
900	char goodfile[1024];
901	char logfile[1024];
902
903	goodfile[0] = 0;
904	logfile[0] = 0;
905
906	page_size = getpagesize();
907	page_mask = page_size - 1;
908
909	setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
910
911	while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
912	       != EOF)
913		switch (ch) {
914		case 'b':
915			simulatedopcount = getnum(optarg, &endp);
916			if (!quiet)
917				fprintf(stdout, "Will begin at operation
918%ld\n",
919					simulatedopcount);
920			if (simulatedopcount == 0)
921				usage();
922			simulatedopcount -= 1;
923			break;
924		case 'c':
925			closeprob = getnum(optarg, &endp);
926			if (!quiet)
927				fprintf(stdout,
928					"Chance of close/open is 1 in %d\n",
929					closeprob);
930			if (closeprob <= 0)
931				usage();
932			break;
933		case 'd':
934			debug = 1;
935			break;
936		case 'l':
937			maxfilelen = getnum(optarg, &endp);
938			if (maxfilelen <= 0)
939				usage();
940			break;
941		case 'm':
942			monitorstart = getnum(optarg, &endp);
943			if (monitorstart < 0)
944				usage();
945			if (!endp || *endp++ != ':')
946				usage();
947			monitorend = getnum(endp, &endp);
948			if (monitorend < 0)
949				usage();
950			if (monitorend == 0)
951				monitorend = -1; /* aka infinity */
952			debug = 1;
953		case 'n':
954			sizechecks = 0;
955			break;
956		case 'o':
957			maxoplen = getnum(optarg, &endp);
958			if (maxoplen <= 0)
959				usage();
960			break;
961		case 'p':
962			progressinterval = getnum(optarg, &endp);
963			if (progressinterval < 0)
964				usage();
965			break;
966		case 'q':
967			quiet = 1;
968			break;
969		case 'r':
970			readbdy = getnum(optarg, &endp);
971			if (readbdy <= 0)
972				usage();
973			break;
974		case 's':
975			style = getnum(optarg, &endp);
976			if (style < 0 || style > 1)
977				usage();
978			break;
979		case 't':
980			truncbdy = getnum(optarg, &endp);
981			if (truncbdy <= 0)
982				usage();
983			break;
984		case 'w':
985			writebdy = getnum(optarg, &endp);
986			if (writebdy <= 0)
987				usage();
988			break;
989		case 'D':
990			debugstart = getnum(optarg, &endp);
991			if (debugstart < 1)
992				usage();
993			break;
994		case 'L':
995		        lite = 1;
996			break;
997		case 'N':
998			numops = getnum(optarg, &endp);
999			if (numops < 0)
1000				usage();
1001			break;
1002		case 'O':
1003			randomoplen = 0;
1004			break;
1005		case 'P':
1006			strncpy(goodfile, optarg, sizeof(goodfile));
1007			strcat(goodfile, "/");
1008			strncpy(logfile, optarg, sizeof(logfile));
1009			strcat(logfile, "/");
1010			break;
1011                case 'R':
1012                        mapped_reads = 0;
1013                        break;
1014		case 'S':
1015                        seed = getnum(optarg, &endp);
1016			if (seed == 0)
1017				seed = time(0) % 10000;
1018			if (!quiet)
1019				fprintf(stdout, "Seed set to %d\n", seed);
1020			if (seed < 0)
1021				usage();
1022			break;
1023		case 'W':
1024		        mapped_writes = 0;
1025			if (!quiet)
1026				fprintf(stdout, "mapped writes DISABLED\n");
1027			break;
1028
1029		default:
1030			usage();
1031			/* NOTREACHED */
1032		}
1033	argc -= optind;
1034	argv += optind;
1035	if (argc != 1)
1036		usage();
1037	fname = argv[0];
1038
1039	signal(SIGHUP,	cleanup);
1040	signal(SIGINT,	cleanup);
1041	signal(SIGPIPE,	cleanup);
1042	signal(SIGALRM,	cleanup);
1043	signal(SIGTERM,	cleanup);
1044	signal(SIGXCPU,	cleanup);
1045	signal(SIGXFSZ,	cleanup);
1046	signal(SIGVTALRM,	cleanup);
1047	signal(SIGUSR1,	cleanup);
1048	signal(SIGUSR2,	cleanup);
1049
1050	initstate(seed, state, 256);
1051	setstate(state);
1052	fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1053	if (fd < 0) {
1054		prterr(fname);
1055		exit(91);
1056	}
1057	strncat(goodfile, fname, 256);
1058	strcat (goodfile, ".fsxgood");
1059	fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1060	if (fsxgoodfd < 0) {
1061		prterr(goodfile);
1062		exit(92);
1063	}
1064	strncat(logfile, fname, 256);
1065	strcat (logfile, ".fsxlog");
1066	fsxlogf = fopen(logfile, "w");
1067	if (fsxlogf == NULL) {
1068		prterr(logfile);
1069		exit(93);
1070	}
1071	if (lite) {
1072		off_t ret;
1073		file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1074		if (file_size == (off_t)-1) {
1075			prterr(fname);
1076			warn("main: lseek eof");
1077			exit(94);
1078		}
1079		ret = lseek(fd, (off_t)0, SEEK_SET);
1080		if (ret == (off_t)-1) {
1081			prterr(fname);
1082			warn("main: lseek 0");
1083			exit(95);
1084		}
1085	}
1086	original_buf = (char *) malloc(maxfilelen);
1087	for (i = 0; i < maxfilelen; i++)
1088		original_buf[i] = random() % 256;
1089	good_buf = (char *) malloc(maxfilelen);
1090	memset(good_buf, '\0', maxfilelen);
1091	temp_buf = (char *) malloc(maxoplen);
1092	memset(temp_buf, '\0', maxoplen);
1093	if (lite) {	/* zero entire existing file */
1094		ssize_t written;
1095
1096		written = write(fd, good_buf, (size_t)maxfilelen);
1097		if (written != maxfilelen) {
1098			if (written == -1) {
1099				prterr(fname);
1100				warn("main: error on write");
1101			} else
1102				warn("main: short write, 0x%x bytes instead
1103of 0x%x\n",
1104				     (unsigned)written, maxfilelen);
1105			exit(98);
1106		}
1107	} else
1108		check_trunc_hack();
1109
1110	while (numops == -1 || numops--)
1111		test();
1112
1113	if (close(fd)) {
1114		prterr("close");
1115		report_failure(99);
1116	}
1117	prt("All operations completed A-OK!\n");
1118
1119	exit(0);
1120	return 0;
1121}
1122