xref: /freebsd/tools/regression/fsx/fsx.c (revision acd3428b7d3e94cef0e1881c868cb4b131d4ff41)
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	fsxgoodfd = 0;
130 FILE *	fsxlogf = NULL;
131 int badoff = -1;
132 int closeopen = 0;
133 
134 
135 void
136 vwarnc(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 
150 void
151 warn(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 
160 void
161 prt(char *fmt, ...)
162 {
163 	va_list args;
164 
165 	va_start(args, fmt);
166 	vfprintf(stdout, fmt, args);
167 	if (fsxlogf)
168 		vfprintf(fsxlogf, fmt, args);
169 	va_end(args);
170 }
171 
172 void
173 prterr(char *prefix)
174 {
175 	prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));
176 }
177 
178 
179 void
180 log4(int operation, int arg0, int arg1, int arg2)
181 {
182 	struct log_entry *le;
183 
184 	le = &oplog[logptr];
185 	le->operation = operation;
186 	if (closeopen)
187 		le->operation = ~ le->operation;
188 	le->args[0] = arg0;
189 	le->args[1] = arg1;
190 	le->args[2] = arg2;
191 	logptr++;
192 	logcount++;
193 	if (logptr >= LOGSIZE)
194 		logptr = 0;
195 }
196 
197 
198 void
199 logdump(void)
200 {
201 	int	i, count, down;
202 	struct log_entry	*lp;
203 
204 	prt("LOG DUMP (%d total operations):\n", logcount);
205 	if (logcount < LOGSIZE) {
206 		i = 0;
207 		count = logcount;
208 	} else {
209 		i = logptr;
210 		count = LOGSIZE;
211 	}
212 	for ( ; count > 0; count--) {
213 		int opnum;
214 
215 		opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;
216 		prt("%d(%d mod 256): ", opnum, opnum%256);
217 		lp = &oplog[i];
218 		if ((closeopen = lp->operation < 0))
219 			lp->operation = ~ lp->operation;
220 
221 		switch (lp->operation) {
222 		case OP_MAPREAD:
223 			prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",
224 			    lp->args[0], lp->args[0] + lp->args[1] - 1,
225 			    lp->args[1]);
226 			if (badoff >= lp->args[0] && badoff <
227 						     lp->args[0] + lp->args[1])
228 				prt("\t***RRRR***");
229 			break;
230 		case OP_MAPWRITE:
231 			prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",
232 			    lp->args[0], lp->args[0] + lp->args[1] - 1,
233 			    lp->args[1]);
234 			if (badoff >= lp->args[0] && badoff <
235 						     lp->args[0] + lp->args[1])
236 				prt("\t******WWWW");
237 			break;
238 		case OP_READ:
239 			prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",
240 			    lp->args[0], lp->args[0] + lp->args[1] - 1,
241 			    lp->args[1]);
242 			if (badoff >= lp->args[0] &&
243 			    badoff < lp->args[0] + lp->args[1])
244 				prt("\t***RRRR***");
245 			break;
246 		case OP_WRITE:
247 			prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",
248 			    lp->args[0], lp->args[0] + lp->args[1] - 1,
249 			    lp->args[1]);
250 			if (lp->args[0] > lp->args[2])
251 				prt(" HOLE");
252 			else if (lp->args[0] + lp->args[1] > lp->args[2])
253 				prt(" EXTEND");
254 			if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&
255 			    badoff < lp->args[0] + lp->args[1])
256 				prt("\t***WWWW");
257 			break;
258 		case OP_TRUNCATE:
259 			down = lp->args[0] < lp->args[1];
260 			prt("TRUNCATE %s\tfrom 0x%x to 0x%x",
261 			    down ? "DOWN" : "UP", lp->args[1], lp->args[0]);
262 			if (badoff >= lp->args[!down] &&
263 			    badoff < lp->args[!!down])
264 				prt("\t******WWWW");
265 			break;
266 		case OP_SKIPPED:
267 			prt("SKIPPED (no operation)");
268 			break;
269 		default:
270 			prt("BOGUS LOG ENTRY (operation code = %d)!",
271 			    lp->operation);
272 		}
273 		if (closeopen)
274 			prt("\n\t\tCLOSE/OPEN");
275 		prt("\n");
276 		i++;
277 		if (i == LOGSIZE)
278 			i = 0;
279 	}
280 }
281 
282 
283 void
284 save_buffer(char *buffer, off_t bufferlength, int fd)
285 {
286 	off_t ret;
287 	ssize_t byteswritten;
288 
289 	if (fd <= 0 || bufferlength == 0)
290 		return;
291 
292 	if (bufferlength > SSIZE_MAX) {
293 		prt("fsx flaw: overflow in save_buffer\n");
294 		exit(67);
295 	}
296 	if (lite) {
297 		off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);
298 		if (size_by_seek == (off_t)-1)
299 			prterr("save_buffer: lseek eof");
300 		else if (bufferlength > size_by_seek) {
301 			warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,
302 			     (unsigned long long)bufferlength);
303 			bufferlength = size_by_seek;
304 		}
305 	}
306 
307 	ret = lseek(fd, (off_t)0, SEEK_SET);
308 	if (ret == (off_t)-1)
309 		prterr("save_buffer: lseek 0");
310 
311 	byteswritten = write(fd, buffer, (size_t)bufferlength);
312 	if (byteswritten != bufferlength) {
313 		if (byteswritten == -1)
314 			prterr("save_buffer write");
315 		else
316 			warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",
317 			     (unsigned)byteswritten,
318 			     (unsigned long long)bufferlength);
319 	}
320 }
321 
322 
323 void
324 report_failure(int status)
325 {
326 	logdump();
327 
328 	if (fsxgoodfd) {
329 		if (good_buf) {
330 			save_buffer(good_buf, file_size, fsxgoodfd);
331 			prt("Correct content saved for comparison\n");
332 			prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",
333 			    fname, fname);
334 		}
335 		close(fsxgoodfd);
336 	}
337 	exit(status);
338 }
339 
340 
341 #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \
342 					*(((unsigned char *)(cp)) + 1)))
343 
344 void
345 check_buffers(unsigned offset, unsigned size)
346 {
347 	unsigned char c, t;
348 	unsigned i = 0;
349 	unsigned n = 0;
350 	unsigned op = 0;
351 	unsigned bad = 0;
352 
353 	if (memcmp(good_buf + offset, temp_buf, size) != 0) {
354 		prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",
355 		    offset, size);
356 		prt("OFFSET\tGOOD\tBAD\tRANGE\n");
357 		while (size > 0) {
358 			c = good_buf[offset];
359 			t = temp_buf[i];
360 			if (c != t) {
361 				if (n == 0) {
362 					bad = short_at(&temp_buf[i]);
363 					prt("0x%5x\t0x%04x\t0x%04x", offset,
364 					    short_at(&good_buf[offset]), bad);
365 					op = temp_buf[offset & 1 ? i+1 : i];
366 				}
367 				n++;
368 				badoff = offset;
369 			}
370 			offset++;
371 			i++;
372 			size--;
373 		}
374 		if (n) {
375 			prt("\t0x%5x\n", n);
376 			if (bad)
377 				prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));
378 			else
379 				prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");
380 		} else
381 			prt("????????????????\n");
382 		report_failure(110);
383 	}
384 }
385 
386 
387 void
388 check_size(void)
389 {
390 	struct stat	statbuf;
391 	off_t	size_by_seek;
392 
393 	if (fstat(fd, &statbuf)) {
394 		prterr("check_size: fstat");
395 		statbuf.st_size = -1;
396 	}
397 	size_by_seek = lseek(fd, (off_t)0, SEEK_END);
398 	if (file_size != statbuf.st_size || file_size != size_by_seek) {
399 		prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",
400 		    (unsigned long long)file_size,
401 		    (unsigned long long)statbuf.st_size,
402 		    (unsigned long long)size_by_seek);
403 		report_failure(120);
404 	}
405 }
406 
407 
408 void
409 check_trunc_hack(void)
410 {
411 	struct stat statbuf;
412 
413 	ftruncate(fd, (off_t)0);
414 	ftruncate(fd, (off_t)100000);
415 	fstat(fd, &statbuf);
416 	if (statbuf.st_size != (off_t)100000) {
417 		prt("no extend on truncate! not posix!\n");
418 		exit(130);
419 	}
420 	ftruncate(fd, (off_t)0);
421 }
422 
423 
424 void
425 doread(unsigned offset, unsigned size)
426 {
427 	off_t ret;
428 	unsigned iret;
429 
430 	offset -= offset % readbdy;
431 	if (size == 0) {
432 		if (!quiet && testcalls > simulatedopcount)
433 			prt("skipping zero size read\n");
434 		log4(OP_SKIPPED, OP_READ, offset, size);
435 		return;
436 	}
437 	if (size + offset > file_size) {
438 		if (!quiet && testcalls > simulatedopcount)
439 			prt("skipping seek/read past end of file\n");
440 		log4(OP_SKIPPED, OP_READ, offset, size);
441 		return;
442 	}
443 
444 	log4(OP_READ, offset, size, 0);
445 
446 	if (testcalls <= simulatedopcount)
447 		return;
448 
449 	if (!quiet && ((progressinterval &&
450 			testcalls % progressinterval == 0) ||
451 		       (debug &&
452 			(monitorstart == -1 ||
453 			 (offset + size > monitorstart &&
454 			  (monitorend == -1 || offset <= monitorend))))))
455 		prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
456 		    offset, offset + size - 1, size);
457 	ret = lseek(fd, (off_t)offset, SEEK_SET);
458 	if (ret == (off_t)-1) {
459 		prterr("doread: lseek");
460 		report_failure(140);
461 	}
462 	iret = read(fd, temp_buf, size);
463 	if (iret != size) {
464 		if (iret == -1)
465 			prterr("doread: read");
466 		else
467 			prt("short read: 0x%x bytes instead of 0x%x\n",
468 			    iret, size);
469 		report_failure(141);
470 	}
471 	check_buffers(offset, size);
472 }
473 
474 
475 void
476 check_eofpage(char *s, unsigned offset, char *p, int size)
477 {
478 	uintptr_t last_page, should_be_zero;
479 
480 	if (offset + size <= (file_size & ~page_mask))
481 		return;
482 	/*
483 	 * we landed in the last page of the file
484 	 * test to make sure the VM system provided 0's
485 	 * beyond the true end of the file mapping
486 	 * (as required by mmap def in 1996 posix 1003.1)
487 	 */
488 	last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;
489 
490 	for (should_be_zero = last_page + (file_size & page_mask);
491 	     should_be_zero < last_page + page_size;
492 	     should_be_zero++)
493 		if (*(char *)should_be_zero) {
494 			prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",
495 			    s, file_size - 1, should_be_zero & page_mask,
496 			    short_at(should_be_zero));
497 			report_failure(205);
498 		}
499 }
500 
501 
502 void
503 domapread(unsigned offset, unsigned size)
504 {
505 	unsigned pg_offset;
506 	unsigned map_size;
507 	char    *p;
508 
509 	offset -= offset % readbdy;
510 	if (size == 0) {
511 		if (!quiet && testcalls > simulatedopcount)
512 			prt("skipping zero size read\n");
513 		log4(OP_SKIPPED, OP_MAPREAD, offset, size);
514 		return;
515 	}
516 	if (size + offset > file_size) {
517 		if (!quiet && testcalls > simulatedopcount)
518 			prt("skipping seek/read past end of file\n");
519 		log4(OP_SKIPPED, OP_MAPREAD, offset, size);
520 		return;
521 	}
522 
523 	log4(OP_MAPREAD, offset, size, 0);
524 
525 	if (testcalls <= simulatedopcount)
526 		return;
527 
528 	if (!quiet && ((progressinterval &&
529 			testcalls % progressinterval == 0) ||
530 		       (debug &&
531 			(monitorstart == -1 ||
532 			 (offset + size > monitorstart &&
533 			  (monitorend == -1 || offset <= monitorend))))))
534 		prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
535 		    offset, offset + size - 1, size);
536 
537 	pg_offset = offset & page_mask;
538 	map_size  = pg_offset + size;
539 
540 	if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,
541 			      (off_t)(offset - pg_offset))) == (char *)-1) {
542 		prterr("domapread: mmap");
543 		report_failure(190);
544 	}
545 	memcpy(temp_buf, p + pg_offset, size);
546 
547 	check_eofpage("Read", offset, p, size);
548 
549 	if (munmap(p, map_size) != 0) {
550 		prterr("domapread: munmap");
551 		report_failure(191);
552 	}
553 
554 	check_buffers(offset, size);
555 }
556 
557 
558 void
559 gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)
560 {
561 	while (size--) {
562 		good_buf[offset] = testcalls % 256;
563 		if (offset % 2)
564 			good_buf[offset] += original_buf[offset];
565 		offset++;
566 	}
567 }
568 
569 
570 void
571 dowrite(unsigned offset, unsigned size)
572 {
573 	off_t ret;
574 	unsigned iret;
575 
576 	offset -= offset % writebdy;
577 	if (size == 0) {
578 		if (!quiet && testcalls > simulatedopcount)
579 			prt("skipping zero size write\n");
580 		log4(OP_SKIPPED, OP_WRITE, offset, size);
581 		return;
582 	}
583 
584 	log4(OP_WRITE, offset, size, file_size);
585 
586 	gendata(original_buf, good_buf, offset, size);
587 	if (file_size < offset + size) {
588 		if (file_size < offset)
589 			memset(good_buf + file_size, '\0', offset - file_size);
590 		file_size = offset + size;
591 		if (lite) {
592 			warn("Lite file size bug in fsx!");
593 			report_failure(149);
594 		}
595 	}
596 
597 	if (testcalls <= simulatedopcount)
598 		return;
599 
600 	if (!quiet && ((progressinterval &&
601 			testcalls % progressinterval == 0) ||
602 		       (debug &&
603 			(monitorstart == -1 ||
604 			 (offset + size > monitorstart &&
605 			  (monitorend == -1 || offset <= monitorend))))))
606 		prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
607 		    offset, offset + size - 1, size);
608 	ret = lseek(fd, (off_t)offset, SEEK_SET);
609 	if (ret == (off_t)-1) {
610 		prterr("dowrite: lseek");
611 		report_failure(150);
612 	}
613 	iret = write(fd, good_buf + offset, size);
614 	if (iret != size) {
615 		if (iret == -1)
616 			prterr("dowrite: write");
617 		else
618 			prt("short write: 0x%x bytes instead of 0x%x\n",
619 			    iret, size);
620 		report_failure(151);
621 	}
622 }
623 
624 
625 void
626 domapwrite(unsigned offset, unsigned size)
627 {
628 	unsigned pg_offset;
629 	unsigned map_size;
630 	off_t    cur_filesize;
631 	char    *p;
632 
633 	offset -= offset % writebdy;
634 	if (size == 0) {
635 		if (!quiet && testcalls > simulatedopcount)
636 			prt("skipping zero size write\n");
637 		log4(OP_SKIPPED, OP_MAPWRITE, offset, size);
638 		return;
639 	}
640 	cur_filesize = file_size;
641 
642 	log4(OP_MAPWRITE, offset, size, 0);
643 
644 	gendata(original_buf, good_buf, offset, size);
645 	if (file_size < offset + size) {
646 		if (file_size < offset)
647 			memset(good_buf + file_size, '\0', offset - file_size);
648 		file_size = offset + size;
649 		if (lite) {
650 			warn("Lite file size bug in fsx!");
651 			report_failure(200);
652 		}
653 	}
654 
655 	if (testcalls <= simulatedopcount)
656 		return;
657 
658 	if (!quiet && ((progressinterval &&
659 			testcalls % progressinterval == 0) ||
660 		       (debug &&
661 			(monitorstart == -1 ||
662 			 (offset + size > monitorstart &&
663 			  (monitorend == -1 || offset <= monitorend))))))
664 		prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,
665 		    offset, offset + size - 1, size);
666 
667 	if (file_size > cur_filesize) {
668 		if (ftruncate(fd, file_size) == -1) {
669 			prterr("domapwrite: ftruncate");
670 			exit(201);
671 		}
672 	}
673 	pg_offset = offset & page_mask;
674 	map_size  = pg_offset + size;
675 
676 	if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,
677 			      MAP_FILE | MAP_SHARED, fd,
678 			      (off_t)(offset - pg_offset))) == (char *)-1) {
679 		prterr("domapwrite: mmap");
680 		report_failure(202);
681 	}
682 	memcpy(p + pg_offset, good_buf + offset, size);
683 	if (msync(p, map_size, 0) != 0) {
684 		prterr("domapwrite: msync");
685 		report_failure(203);
686 	}
687 
688 	check_eofpage("Write", offset, p, size);
689 
690 	if (munmap(p, map_size) != 0) {
691 		prterr("domapwrite: munmap");
692 		report_failure(204);
693 	}
694 }
695 
696 
697 void
698 dotruncate(unsigned size)
699 {
700 	int oldsize = file_size;
701 
702 	size -= size % truncbdy;
703 	if (size > biggest) {
704 		biggest = size;
705 		if (!quiet && testcalls > simulatedopcount)
706 			prt("truncating to largest ever: 0x%x\n", size);
707 	}
708 
709 	log4(OP_TRUNCATE, size, (unsigned)file_size, 0);
710 
711 	if (size > file_size)
712 		memset(good_buf + file_size, '\0', size - file_size);
713 	file_size = size;
714 
715 	if (testcalls <= simulatedopcount)
716 		return;
717 
718 	if ((progressinterval && testcalls % progressinterval == 0) ||
719 	    (debug && (monitorstart == -1 || monitorend == -1 ||
720 		       size <= monitorend)))
721 		prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);
722 	if (ftruncate(fd, (off_t)size) == -1) {
723 		prt("ftruncate1: %x\n", size);
724 		prterr("dotruncate: ftruncate");
725 		report_failure(160);
726 	}
727 }
728 
729 
730 void
731 writefileimage()
732 {
733 	ssize_t iret;
734 
735 	if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {
736 		prterr("writefileimage: lseek");
737 		report_failure(171);
738 	}
739 	iret = write(fd, good_buf, file_size);
740 	if ((off_t)iret != file_size) {
741 		if (iret == -1)
742 			prterr("writefileimage: write");
743 		else
744 			prt("short write: 0x%x bytes instead of 0x%llx\n",
745 			    iret, (unsigned long long)file_size);
746 		report_failure(172);
747 	}
748 	if (lite ? 0 : ftruncate(fd, file_size) == -1) {
749 		prt("ftruncate2: %llx\n", (unsigned long long)file_size);
750 		prterr("writefileimage: ftruncate");
751 		report_failure(173);
752 	}
753 }
754 
755 
756 void
757 docloseopen(void)
758 {
759 	if (testcalls <= simulatedopcount)
760 		return;
761 
762 	if (debug)
763 		prt("%lu close/open\n", testcalls);
764 	if (close(fd)) {
765 		prterr("docloseopen: close");
766 		report_failure(180);
767 	}
768 	fd = open(fname, O_RDWR, 0);
769 	if (fd < 0) {
770 		prterr("docloseopen: open");
771 		report_failure(181);
772 	}
773 }
774 
775 
776 void
777 test(void)
778 {
779 	unsigned long	offset;
780 	unsigned long	size = maxoplen;
781 	unsigned long	rv = random();
782 	unsigned long	op = rv % (3 + !lite + mapped_writes);
783 
784 	/* turn off the map read if necessary */
785 
786 	if (op == 2 && !mapped_reads)
787 	    op = 0;
788 
789 	if (simulatedopcount > 0 && testcalls == simulatedopcount)
790 		writefileimage();
791 
792 	testcalls++;
793 
794 	if (closeprob)
795 		closeopen = (rv >> 3) < (1 << 28) / closeprob;
796 
797 	if (debugstart > 0 && testcalls >= debugstart)
798 		debug = 1;
799 
800 	if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)
801 		prt("%lu...\n", testcalls);
802 
803 	/*
804 	 * READ:	op = 0
805 	 * WRITE:	op = 1
806 	 * MAPREAD:     op = 2
807 	 * TRUNCATE:	op = 3
808 	 * MAPWRITE:    op = 3 or 4
809 	 */
810 	if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */
811 		dotruncate(random() % maxfilelen);
812 	else {
813 		if (randomoplen)
814 			size = random() % (maxoplen+1);
815 		if (lite ? 0 : op == 3)
816 			dotruncate(size);
817 		else {
818 			offset = random();
819 			if (op == 1 || op == (lite ? 3 : 4)) {
820 				offset %= maxfilelen;
821 				if (offset + size > maxfilelen)
822 					size = maxfilelen - offset;
823 				if (op != 1)
824 					domapwrite(offset, size);
825 				else
826 					dowrite(offset, size);
827 			} else {
828 				if (file_size)
829 					offset %= file_size;
830 				else
831 					offset = 0;
832 				if (offset + size > file_size)
833 					size = file_size - offset;
834 				if (op != 0)
835 					domapread(offset, size);
836 				else
837 					doread(offset, size);
838 			}
839 		}
840 	}
841 	if (sizechecks && testcalls > simulatedopcount)
842 		check_size();
843 	if (closeopen)
844 		docloseopen();
845 }
846 
847 
848 void
849 cleanup(sig)
850 	int	sig;
851 {
852 	if (sig)
853 		prt("signal %d\n", sig);
854 	prt("testcalls = %lu\n", testcalls);
855 	exit(sig);
856 }
857 
858 
859 void
860 usage(void)
861 {
862 	fprintf(stdout, "usage: %s",
863 		"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\
864 	-b opnum: beginning operation number (default 1)\n\
865 	-c P: 1 in P chance of file close+open at each op (default infinity)\n\
866 	-d: debug output for all operations\n\
867 	-l flen: the upper bound on file size (default 262144)\n\
868 	-m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\
869 	-n: no verifications of file size\n\
870 	-o oplen: the upper bound on operation size (default 65536)\n\
871 	-p progressinterval: debug output at specified operation interval\n\
872 	-q: quieter operation\n\
873 	-r readbdy: 4096 would make reads page aligned (default 1)\n\
874 	-s style: 1 gives smaller truncates (default 0)\n\
875 	-t truncbdy: 4096 would make truncates page aligned (default 1)\n\
876 	-w writebdy: 4096 would make writes page aligned (default 1)\n\
877 	-D startingop: debug output starting at specified operation\n\
878 	-L: fsxLite - no file creations & no file size changes\n\
879 	-N numops: total # operations to do (default infinity)\n\
880 	-O: use oplen (see -o flag) for every op (default random)\n\
881 	-P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\
882 	-S seed: for random # generator (default 1) 0 gets timestamp\n\
883 	-W: mapped write operations DISabled\n\
884 	-R: mapped read operations DISabled)\n\
885 	fname: this filename is REQUIRED (no default)\n");
886 	exit(90);
887 }
888 
889 
890 int
891 getnum(char *s, char **e)
892 {
893 	int ret = -1;
894 
895 	*e = (char *) 0;
896 	ret = strtol(s, e, 0);
897 	if (*e)
898 		switch (**e) {
899 		case 'b':
900 		case 'B':
901 			ret *= 512;
902 			*e = *e + 1;
903 			break;
904 		case 'k':
905 		case 'K':
906 			ret *= 1024;
907 			*e = *e + 1;
908 			break;
909 		case 'm':
910 		case 'M':
911 			ret *= 1024*1024;
912 			*e = *e + 1;
913 			break;
914 		case 'w':
915 		case 'W':
916 			ret *= 4;
917 			*e = *e + 1;
918 			break;
919 		}
920 	return (ret);
921 }
922 
923 
924 int
925 main(int argc, char **argv)
926 {
927 	int	i, ch;
928 	char	*endp;
929 	char goodfile[1024];
930 	char logfile[1024];
931 
932 	goodfile[0] = 0;
933 	logfile[0] = 0;
934 
935 	page_size = getpagesize();
936 	page_mask = page_size - 1;
937 
938 	setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */
939 
940 	while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))
941 	       != EOF)
942 		switch (ch) {
943 		case 'b':
944 			simulatedopcount = getnum(optarg, &endp);
945 			if (!quiet)
946 				fprintf(stdout, "Will begin at operation %ld\n",
947 					simulatedopcount);
948 			if (simulatedopcount == 0)
949 				usage();
950 			simulatedopcount -= 1;
951 			break;
952 		case 'c':
953 			closeprob = getnum(optarg, &endp);
954 			if (!quiet)
955 				fprintf(stdout,
956 					"Chance of close/open is 1 in %d\n",
957 					closeprob);
958 			if (closeprob <= 0)
959 				usage();
960 			break;
961 		case 'd':
962 			debug = 1;
963 			break;
964 		case 'l':
965 			maxfilelen = getnum(optarg, &endp);
966 			if (maxfilelen <= 0)
967 				usage();
968 			break;
969 		case 'm':
970 			monitorstart = getnum(optarg, &endp);
971 			if (monitorstart < 0)
972 				usage();
973 			if (!endp || *endp++ != ':')
974 				usage();
975 			monitorend = getnum(endp, &endp);
976 			if (monitorend < 0)
977 				usage();
978 			if (monitorend == 0)
979 				monitorend = -1; /* aka infinity */
980 			debug = 1;
981 		case 'n':
982 			sizechecks = 0;
983 			break;
984 		case 'o':
985 			maxoplen = getnum(optarg, &endp);
986 			if (maxoplen <= 0)
987 				usage();
988 			break;
989 		case 'p':
990 			progressinterval = getnum(optarg, &endp);
991 			if (progressinterval < 0)
992 				usage();
993 			break;
994 		case 'q':
995 			quiet = 1;
996 			break;
997 		case 'r':
998 			readbdy = getnum(optarg, &endp);
999 			if (readbdy <= 0)
1000 				usage();
1001 			break;
1002 		case 's':
1003 			style = getnum(optarg, &endp);
1004 			if (style < 0 || style > 1)
1005 				usage();
1006 			break;
1007 		case 't':
1008 			truncbdy = getnum(optarg, &endp);
1009 			if (truncbdy <= 0)
1010 				usage();
1011 			break;
1012 		case 'w':
1013 			writebdy = getnum(optarg, &endp);
1014 			if (writebdy <= 0)
1015 				usage();
1016 			break;
1017 		case 'D':
1018 			debugstart = getnum(optarg, &endp);
1019 			if (debugstart < 1)
1020 				usage();
1021 			break;
1022 		case 'L':
1023 			lite = 1;
1024 			break;
1025 		case 'N':
1026 			numops = getnum(optarg, &endp);
1027 			if (numops < 0)
1028 				usage();
1029 			break;
1030 		case 'O':
1031 			randomoplen = 0;
1032 			break;
1033 		case 'P':
1034 			strncpy(goodfile, optarg, sizeof(goodfile));
1035 			strcat(goodfile, "/");
1036 			strncpy(logfile, optarg, sizeof(logfile));
1037 			strcat(logfile, "/");
1038 			break;
1039 		case 'R':
1040 			mapped_reads = 0;
1041 			break;
1042 		case 'S':
1043 			seed = getnum(optarg, &endp);
1044 			if (seed == 0)
1045 				seed = time(0) % 10000;
1046 			if (!quiet)
1047 				fprintf(stdout, "Seed set to %d\n", seed);
1048 			if (seed < 0)
1049 				usage();
1050 			break;
1051 		case 'W':
1052 			mapped_writes = 0;
1053 			if (!quiet)
1054 				fprintf(stdout, "mapped writes DISABLED\n");
1055 			break;
1056 
1057 		default:
1058 			usage();
1059 			/* NOTREACHED */
1060 		}
1061 	argc -= optind;
1062 	argv += optind;
1063 	if (argc != 1)
1064 		usage();
1065 	fname = argv[0];
1066 
1067 	signal(SIGHUP,	cleanup);
1068 	signal(SIGINT,	cleanup);
1069 	signal(SIGPIPE,	cleanup);
1070 	signal(SIGALRM,	cleanup);
1071 	signal(SIGTERM,	cleanup);
1072 	signal(SIGXCPU,	cleanup);
1073 	signal(SIGXFSZ,	cleanup);
1074 	signal(SIGVTALRM,	cleanup);
1075 	signal(SIGUSR1,	cleanup);
1076 	signal(SIGUSR2,	cleanup);
1077 
1078 	initstate(seed, state, 256);
1079 	setstate(state);
1080 	fd = open(fname, O_RDWR|(lite ? 0 : O_CREAT|O_TRUNC), 0666);
1081 	if (fd < 0) {
1082 		prterr(fname);
1083 		exit(91);
1084 	}
1085 	strncat(goodfile, fname, 256);
1086 	strcat (goodfile, ".fsxgood");
1087 	fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666);
1088 	if (fsxgoodfd < 0) {
1089 		prterr(goodfile);
1090 		exit(92);
1091 	}
1092 	strncat(logfile, fname, 256);
1093 	strcat (logfile, ".fsxlog");
1094 	fsxlogf = fopen(logfile, "w");
1095 	if (fsxlogf == NULL) {
1096 		prterr(logfile);
1097 		exit(93);
1098 	}
1099 	if (lite) {
1100 		off_t ret;
1101 		file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END);
1102 		if (file_size == (off_t)-1) {
1103 			prterr(fname);
1104 			warn("main: lseek eof");
1105 			exit(94);
1106 		}
1107 		ret = lseek(fd, (off_t)0, SEEK_SET);
1108 		if (ret == (off_t)-1) {
1109 			prterr(fname);
1110 			warn("main: lseek 0");
1111 			exit(95);
1112 		}
1113 	}
1114 	original_buf = (char *) malloc(maxfilelen);
1115 	for (i = 0; i < maxfilelen; i++)
1116 		original_buf[i] = random() % 256;
1117 	good_buf = (char *) malloc(maxfilelen);
1118 	memset(good_buf, '\0', maxfilelen);
1119 	temp_buf = (char *) malloc(maxoplen);
1120 	memset(temp_buf, '\0', maxoplen);
1121 	if (lite) {	/* zero entire existing file */
1122 		ssize_t written;
1123 
1124 		written = write(fd, good_buf, (size_t)maxfilelen);
1125 		if (written != maxfilelen) {
1126 			if (written == -1) {
1127 				prterr(fname);
1128 				warn("main: error on write");
1129 			} else
1130 				warn("main: short write, 0x%x bytes instead of 0x%x\n",
1131 				     (unsigned)written, maxfilelen);
1132 			exit(98);
1133 		}
1134 	} else
1135 		check_trunc_hack();
1136 
1137 	while (numops == -1 || numops--)
1138 		test();
1139 
1140 	if (close(fd)) {
1141 		prterr("close");
1142 		report_failure(99);
1143 	}
1144 	prt("All operations completed A-OK!\n");
1145 
1146 	exit(0);
1147 	return 0;
1148 }
1149 
1150