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