1 /* IBM Corporation */
2 /* 01/02/2003 Port to LTP avenkat@us.ibm.com */
3 /* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
4 /*
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #define _GNU_SOURCE 1
21 #include <stdio.h>
22 #include <fcntl.h>
23 #include <signal.h>
24 #include <sys/mman.h>
25 #include <sys/wait.h>
26 #include <sys/stat.h>
27 #include <unistd.h>
28 #include <stdlib.h>
29 #include <errno.h>
30 #include <sys/types.h>
31 #include <limits.h>
32 /***** LTP Port *****/
33 #include "test.h"
34 #define FAILED 0
35 #define PASSED 1
36
37 int local_flag = PASSED;
38 char *TCID = "mmapstress10";
39 FILE *temp;
40 int TST_TOTAL = 1;
41
42 int anyfail();
43 void ok_exit();
44 /***** ** ** *****/
45
46 /*
47 * This test stresses mmaps, specifically the code dealing with
48 * mapping of fragments. It forks a specified number of children,
49 * all of whom mmap the same file, make a given number of accesses
50 * to random pages in the map (reading & writing and comparing data).
51 * Then the child exits and the parent forks another to take its place.
52 * Each time a child is forked, it stats the file and maps the full
53 * length of the file. Meanwhile, another child is forked which
54 * continually writes to the file. It loops writing some bytes (default
55 * 20), then sleeps some seconds (default 1). This causes the file
56 * to gradually grow, crossing fragment boundaries, etc.
57 * Then it forks yet *another* child who maps the file in extend
58 * mode, just to check out interaction. (Because this will cause
59 * 0 padding at end of file, children can't test as exactly as in tmmap -
60 * have to check for zero or pattern...)
61 *
62 * This program continues to run until it either receives a SIGINT,
63 * or times out (if a timeout value is specified). When either of
64 * these things happens, it cleans up its kids, then checks the
65 * file to make sure it has the correct data.
66 *
67 * usage:
68 * mmapstress10 -p nprocs [-t minutes -w nbytes -s secs -f filesize
69 * -S sparseoffset -r -o -m -l -d]
70 * where:
71 * -p nprocs - specifies the number of mapping children
72 * to create. (nprocs + 1 children actually
73 * get created, since one is the writer child)
74 * -t minutes - specifies minutes to run. If not specified,
75 * default is to run forever until a SIGINT
76 * is received.
77 * -w nbytes - specifies number of bytes for writer process
78 * to write at a time (i.e. between sleeps).
79 * defaults to GROWSIZE bytes.
80 * -s secs - specifies number of seconds for writer process
81 * to sleep between writes. Defaults to
82 * SLEEPTIME seconds.
83 * -f filesize - initial filesize (defaults to FILESIZE)
84 * -S sparseoffset - when non-zero, causes a sparse area to
85 * be left before the data, meaning that the
86 * actual initial file size is sparseoffset +
87 * filesize. Useful for testing large files.
88 * (default is 0).
89 * -r - randomize number of pages map children check.
90 * (random % MAXLOOPS). If not specified, each
91 * child checks MAXLOOPS pages.
92 * -o - randomize offset of file to map. (default is 0)
93 * -m - do random msync/fsyncs as well
94 * -l - if set, the output file is not removed on
95 * program exit.
96 * -d - enable debug outputd
97 *
98 * Compile with -DLARGE_FILE to enable file sizes > 2 GB.
99 */
100
101 #define MAXLOOPS 500 /* max pages for map children to write */
102 #define GROWSIZE 20 /* # bytes to write per write call */
103 #define SLEEPTIME 1 /* # secs to sleep between writes */
104 #define FILESIZE 4096 /* initial filesize set up by parent */
105 #ifdef roundup
106 #undef roundup
107 #endif
108 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
109 #define min(x, y) (((x) < (y)) ? (x) : (y))
110
111 #define SIZE_MAX UINT_MAX
112
113 extern time_t time(time_t *);
114 extern char *ctime(const time_t *);
115 extern void *malloc(size_t);
116 extern void exit(int);
117 extern long lrand48(void);
118 extern void srand(unsigned);
119 extern void srand48(long);
120 extern int rand(void);
121 extern int atoi(const char *);
122
123 char *usage =
124 "-p nprocs [-t minutes -w nbytes -s secs -f fsize -S sparseoffset -r -o -m -l -d]";
125
126 typedef unsigned char uchar_t; //Ananda 12/17/02
127
128 void child_mapper(char *file, unsigned procno, unsigned nprocs);
129 void child_writer(char *file, uchar_t * buf);
130 int fileokay(char *file, uchar_t * expbuf);
131 unsigned int initrand(void);
132 void finish(int sig);
133 void clean_up_file(int sig);
134 int finished = 0;
135 int leavefile = 0;
136
137 int debug = 0;
138 int growsize = GROWSIZE;
139 int sleeptime = SLEEPTIME;
140 #ifdef LARGE_FILE
141 off64_t filesize = FILESIZE;
142 off64_t sparseoffset = 0;
143 #else /* LARGE_FILE */
144 off_t filesize = FILESIZE;
145 off_t sparseoffset = 0;
146 #endif /* LARGE_FILE */
147 unsigned randloops = 0;
148 unsigned dosync = 0;
149 unsigned do_offset = 0;
150 unsigned pattern = 0;
151 static const char *filename = "mmapstress10.out";
152
153 void clean_mapper(int sig);
154 void clean_writer(int sig);
155
156 int fd_mapper = 0;
157 caddr_t maddr_mapper;
158 size_t mapsize_mapper;
159
160 int fd_writer = 0;
161
main(int argc,char * argv[])162 int main(int argc, char *argv[])
163 {
164 char *progname;
165 int fd;
166 int c;
167 extern char *optarg;
168 unsigned nprocs = 0;
169 unsigned procno;
170 pid_t *pidarray = NULL;
171 pid_t pid;
172 pid_t wr_pid = 0;
173 uchar_t *buf = NULL;
174 unsigned int seed;
175 int pagesize = sysconf(_SC_PAGE_SIZE);
176 float alarmtime = 0;
177 struct sigaction sa;
178 unsigned i;
179 int write_cnt;
180 uchar_t data;
181 int no_prob = 0;
182 int wait_stat;
183 time_t t;
184 #ifdef LARGE_FILE
185 off64_t bytes_left;
186 #else /* LARGE_FILE */
187 off_t bytes_left;
188 #endif /* LARGE_FILE */
189
190 progname = *argv;
191 tst_tmpdir();
192 if (argc < 2) {
193 (void)fprintf(stderr, "usage: %s %s\n", progname, usage);
194 exit(1);
195 }
196
197 while ((c = getopt(argc, argv, "S:omdlrf:p:t:w:s:")) != -1) {
198 switch (c) {
199 case 'd':
200 debug = 1;
201 break;
202 case 't':
203 alarmtime = atof(optarg) * 60;
204 break;
205 case 'p':
206 nprocs = atoi(optarg);
207 break;
208 case 'l':
209 leavefile = 1;
210 break;
211 case 's':
212 sleeptime = atoi(optarg);
213 if (sleeptime < 0) {
214 (void)fprintf(stderr, "error: negative "
215 "sleeptime\n");
216 anyfail();
217 }
218 break;
219 case 'w':
220 growsize = atoi(optarg);
221 if (growsize < 0) {
222 (void)fprintf(stderr, "error: negative write "
223 "size\n");
224 anyfail();
225 }
226 break;
227 case 'f':
228 #ifdef LARGE_FILE
229 filesize = atoll(optarg);
230 #else /* LARGE_FILE */
231 filesize = atoi(optarg);
232 #endif /* LARGE_FILE */
233 if (filesize < 0) {
234 (void)fprintf(stderr, "error: negative "
235 "filesize\n");
236 anyfail();
237 }
238 break;
239 case 'r':
240 randloops = 1;
241 break;
242 case 'm':
243 dosync = 1;
244 break;
245 case 'o':
246 do_offset = 1;
247 break;
248 case 'S':
249 #ifdef LARGE_FILE
250 sparseoffset = atoll(optarg);
251 #else /* LARGE_FILE */
252 sparseoffset = atoi(optarg);
253 #endif /* LARGE_FILE */
254 if (sparseoffset % pagesize != 0) {
255 fprintf(stderr,
256 "sparseoffset must be pagesize multiple\n");
257 anyfail();
258 }
259 break;
260 default:
261 (void)fprintf(stderr, "usage: %s %s\n", progname,
262 usage);
263 anyfail();
264 }
265 }
266
267 if (nprocs > 255) {
268 (void)fprintf(stderr, "invalid nprocs %d - (range 0-255)\n",
269 nprocs);
270 anyfail();
271 }
272 (void)time(&t);
273
274 seed = initrand();
275 pattern = seed & 0xff;
276
277 if (debug) {
278 #ifdef LARGE_FILE
279 (void)printf("creating file <%s> with %Ld bytes, pattern %d\n",
280 filename, filesize, pattern);
281 #else /* LARGE_FILE */
282 (void)printf("creating file <%s> with %ld bytes, pattern %d\n",
283 filename, filesize, pattern);
284 #endif /* LARGE_FILE */
285 if (alarmtime)
286 (void)printf("running for %f minutes\n",
287 alarmtime / 60);
288 else
289 (void)printf("running with no time limit\n");
290 }
291
292 /*
293 * Plan for death by signal. User may have specified
294 * a time limit, in which case set an alarm and catch SIGALRM.
295 * Also catch and cleanup with SIGINT, SIGQUIT, and SIGTERM.
296 */
297 sa.sa_handler = finish;
298 sa.sa_flags = 0;
299 if (sigemptyset(&sa.sa_mask)) {
300 perror("sigempty error");
301 goto cleanup;
302 }
303
304 if (sigaction(SIGINT, &sa, 0) == -1) {
305 perror("sigaction error SIGINT");
306 goto cleanup;
307 }
308 if (alarmtime) {
309 if (sigaction(SIGALRM, &sa, 0) == -1) {
310 perror("sigaction error");
311 goto cleanup;
312 }
313 (void)alarm(alarmtime);
314 }
315 /* If we get a SIGQUIT or SIGTERM, clean up and exit immediately. */
316 sa.sa_handler = clean_up_file;
317 if (sigaction(SIGQUIT, &sa, 0) == -1) {
318 perror("sigaction error SIGQUIT");
319 goto cleanup;
320 }
321 if (sigaction(SIGTERM, &sa, 0) == -1) {
322 perror("sigaction error SIGTERM");
323 goto cleanup;
324 }
325 #ifdef LARGE_FILE
326 if ((fd = open64(filename, O_CREAT | O_TRUNC | O_RDWR, 0664)) == -1) {
327 #else /* LARGE_FILE */
328 if ((fd = open(filename, O_CREAT | O_TRUNC | O_RDWR, 0664)) == -1) {
329 #endif /* LARGE_FILE */
330 perror("open error");
331 anyfail();
332 }
333
334 if ((buf = malloc(pagesize + growsize)) == NULL
335 || (pidarray = malloc(nprocs * sizeof(pid_t))) == NULL) {
336 perror("malloc error");
337 anyfail();
338 }
339
340 for (i = 0; i < nprocs; i++)
341 *(pidarray + i) = 0;
342
343 for (i = 0, data = 0; i < pagesize; i++) {
344 *(buf + i) = (data + pattern) & 0xff;
345 if (++data == nprocs)
346 data = 0;
347 }
348 for (data = 0; i < pagesize + growsize; i++) {
349 *(buf + i) = (data + pattern) & 0xff;
350 if (++data == nprocs)
351 data = 0;
352 }
353
354 #ifdef LARGE_FILE
355 if (lseek64(fd, sparseoffset, SEEK_SET) < 0) {
356 #else /* LARGE_FILE */
357 if (lseek(fd, sparseoffset, SEEK_SET) < 0) {
358 #endif /* LARGE_FILE */
359 perror("lseek");
360 anyfail();
361 }
362
363 for (bytes_left = filesize; bytes_left; bytes_left -= c) {
364 write_cnt = min(pagesize, bytes_left);
365 if ((c = write(fd, (char *)buf, write_cnt)) != write_cnt) {
366 if (c == -1) {
367 perror("write error");
368 } else {
369 (void)fprintf(stderr, "write: wrote %d of %d "
370 "bytes\n", c, write_cnt);
371 }
372 (void)close(fd);
373 (void)unlink(filename);
374 anyfail();
375 }
376 }
377
378 (void)close(fd);
379
380 /*
381 * Fork off mmap children.
382 */
383 for (procno = 0; procno < nprocs; procno++) {
384 switch (pid = fork()) {
385
386 case -1:
387 perror("fork error");
388 goto cleanup;
389
390 case 0:
391 child_mapper(filename, procno, nprocs);
392 exit(0);
393
394 default:
395 pidarray[procno] = pid;
396 }
397 }
398
399 /*
400 * Now fork off an additional process to continually
401 * write to (and grow) the file.
402 */
403 if ((wr_pid = fork()) == -1) {
404 perror("fork error");
405 goto cleanup;
406 } else if (wr_pid == 0) { /* child */
407 child_writer(filename, buf);
408 exit(0);
409 }
410
411 /*
412 * Now wait for children and refork them as needed.
413 */
414
415 while (!finished) {
416 pid = wait(&wait_stat);
417 /*
418 * Block signals while processing child exit.
419 */
420
421 if (sighold(SIGALRM) || sighold(SIGINT)) {
422 perror("sighold error");
423 goto cleanup;
424 }
425
426 if (pid != -1) {
427 /*
428 * Check exit status, then refork with the
429 * appropriate procno.
430 */
431 if (!WIFEXITED(wait_stat)
432 || WEXITSTATUS(wait_stat) != 0) {
433 (void)fprintf(stderr, "child exit with err "
434 "<x%x>\n", wait_stat);
435 goto cleanup;
436 }
437 for (i = 0; i < nprocs; i++)
438 if (pid == pidarray[i])
439 break;
440 if (i == nprocs) {
441 if (pid == wr_pid) {
442 (void)fprintf(stderr,
443 "writer child unexpected exit <x%x>\n",
444 wait_stat);
445 wr_pid = 0;
446 } else
447 (void)fprintf(stderr, "unknown child "
448 "pid %d, <x%x>\n",
449 pid, wait_stat);
450 goto cleanup;
451 }
452
453 if ((pid = fork()) == -1) {
454 perror("fork error");
455 pidarray[i] = 0;
456 goto cleanup;
457 } else if (pid == 0) { /* child */
458 child_mapper(filename, i, nprocs);
459 exit(0);
460 } else
461 pidarray[i] = pid;
462 } else {
463 /*
464 * wait returned an error. If EINTR, then
465 * normal finish, else it's an unexpected
466 * error...
467 */
468 if (errno != EINTR || !finished) {
469 perror("unexpected wait error");
470 goto cleanup;
471 }
472 }
473 if (sigrelse(SIGALRM) || sigrelse(SIGINT)) {
474 perror("sigrelse error");
475 goto cleanup;
476 }
477 }
478
479 /*
480 * Finished! Check the file for sanity, then kill all
481 * the children and done!.
482 */
483
484 (void)alarm(0);
485 no_prob = 1;
486
487 cleanup:
488 for (i = 0; i < nprocs; i++)
489 (void)kill(pidarray[i], SIGUSR1);
490 (void)kill(wr_pid, SIGUSR1);
491
492 while (wait(&wait_stat) != -1 || errno != ECHILD)
493 continue;
494
495 if (no_prob) { /* only check file if no errors */
496 if (!fileokay(filename, buf)) {
497 (void)fprintf(stderr, "file data incorrect!\n");
498 (void)printf(" leaving file <%s>\n", filename);
499 anyfail();
500
501 } else {
502 (void)printf("file data okay\n");
503 if (!leavefile)
504 (void)unlink(filename);
505 }
506 } else
507 (void)printf(" leaving file <%s>\n", filename);
508
509 (void)time(&t);
510 // (void)printf("%s: Finished %s", argv[0], ctime(&t)); LTP Port
511 ok_exit();
512 tst_exit();
513 }
514
515 /*
516 * Child process that reads/writes map. The child stats the file
517 * to determine the size, maps the size of the file, then reads/writes
518 * its own locations on random pages of the map (its locations being
519 * determined based on nprocs & procno). After a specific number of
520 * iterations, it exits.
521 */
522 void child_mapper(char *file, unsigned procno, unsigned nprocs)
523 {
524 #ifdef LARGE_FILE
525 struct stat64 statbuf;
526 off64_t filesize;
527 off64_t offset;
528 #else /* LARGE_FILE */
529 struct stat statbuf;
530 off_t filesize;
531 off_t offset;
532 #endif /* LARGE_FILE */
533 size_t validsize;
534 caddr_t paddr;
535 int pagesize = sysconf(_SC_PAGE_SIZE);
536 unsigned randpage;
537 unsigned int seed;
538 unsigned loopcnt;
539 unsigned nloops;
540 unsigned mappages;
541 unsigned mapflags;
542 unsigned i;
543 struct sigaction sa_mapper;
544
545 mapflags = MAP_SHARED;
546
547 seed = initrand(); /* initialize random seed */
548
549 sa_mapper.sa_handler = clean_mapper;
550 sa_mapper.sa_flags = 0;
551 if (sigemptyset(&sa_mapper.sa_mask)) {
552 perror("sigempty error");
553 anyfail();
554 }
555
556 if (sigaction(SIGUSR1, &sa_mapper, 0) == -1) {
557 perror("sigaction error SIGUSR1");
558 anyfail();
559 }
560 #ifdef LARGE_FILE
561 if ((fd_mapper = open64(file, O_RDWR)) == -1) {
562 #else /* LARGE_FILE */
563 if ((fd_mapper = open(file, O_RDWR)) == -1) {
564 #endif /* LARGE_FILE */
565 perror("open error");
566 anyfail();
567 }
568 #ifdef LARGE_FILE
569 if (fstat64(fd_mapper, &statbuf) == -1) {
570 #else /* LARGE_FILE */
571 if (fstat(fd_mapper, &statbuf) == -1) {
572 #endif /* LARGE_FILE */
573 perror("stat error");
574 anyfail();
575 }
576 filesize = statbuf.st_size;
577
578 if (statbuf.st_size - sparseoffset > SIZE_MAX) {
579 fprintf(stderr, "size_t overflow when setting up map\n");
580 anyfail();
581 }
582 mapsize_mapper = (size_t) (statbuf.st_size - sparseoffset);
583 mappages = roundup(mapsize_mapper, pagesize) / pagesize;
584 offset = sparseoffset;
585 if (do_offset) {
586 int pageoffset = lrand48() % mappages;
587 int byteoffset = pageoffset * pagesize;
588 offset += byteoffset;
589 mapsize_mapper -= byteoffset;
590 mappages -= pageoffset;
591 }
592 #ifdef LARGE_FILE
593 if ((maddr_mapper = mmap64(0, mapsize_mapper, PROT_READ | PROT_WRITE,
594 mapflags, fd_mapper,
595 offset)) == (caddr_t) - 1) {
596 #else /* LARGE_FILE */
597 if ((maddr_mapper = mmap(0, mapsize_mapper, PROT_READ | PROT_WRITE,
598 mapflags, fd_mapper,
599 offset)) == (caddr_t) - 1) {
600 #endif /* LARGE_FILE */
601 perror("mmap error");
602 anyfail();
603 }
604
605 (void)close(fd_mapper);
606
607 nloops = (randloops) ? (lrand48() % MAXLOOPS) : MAXLOOPS;
608
609 if (debug) {
610 #ifdef LARGE_FILE
611 (void)printf("child %d (pid %ld): seed %d, fsize %Ld, "
612 "mapsize %d, off %Ld, loop %d\n",
613 procno, getpid(), seed, filesize, mapsize_mapper,
614 offset / pagesize, nloops);
615 #else /* LARGE_FILE */
616 (void)printf("child %d (pid %d): seed %d, fsize %ld, "
617 "mapsize %ld, off %ld, loop %d\n",
618 procno, getpid(), seed, filesize,
619 (long)mapsize_mapper, offset / pagesize, nloops);
620 #endif /* LARGE_FILE */
621 }
622
623 /*
624 * Now loop read/writing random pages.
625 */
626 for (loopcnt = 0; loopcnt < nloops; loopcnt++) {
627 randpage = lrand48() % mappages;
628 paddr = maddr_mapper + (randpage * pagesize); /* page address */
629
630 if (randpage < mappages - 1 || !(mapsize_mapper % pagesize))
631 validsize = pagesize;
632 else
633 validsize = mapsize_mapper % pagesize;
634
635 /*
636 * Because one child is mapping file in extend mode,
637 * it may be padded with zeros at end. So we can't
638 * do an exact check -- accept known pattern OR zeros.
639 */
640 for (i = procno; i < validsize; i += nprocs) {
641 if (*((unsigned char *)(paddr + i))
642 != ((procno + pattern) & 0xff)
643 && *((unsigned char *)(paddr + i)) != 0) {
644 (void)fprintf(stderr, "child %d: invalid data "
645 "<x%x>", procno,
646 *((unsigned char *)(paddr + i)));
647 (void)fprintf(stderr,
648 " at pg %d off %d, exp "
649 "<x%x>\n", randpage, i,
650 (procno + pattern) & 0xff);
651 anyfail();
652 }
653 /*
654 * Now write it.
655 */
656
657 *(paddr + i) = (procno + pattern) & 0xff;
658 }
659 }
660 if (dosync) {
661 /*
662 * Exercise msync() as well!
663 */
664 randpage = lrand48() % mappages;
665 paddr = maddr_mapper + (randpage * pagesize); /* page address */
666 if (msync(paddr, (mappages - randpage) * pagesize,
667 MS_SYNC) == -1) {
668 perror("msync error");
669 anyfail();
670 }
671 }
672 if (munmap(maddr_mapper, mapsize_mapper) == -1) {
673 perror("munmap failed");
674 anyfail();
675 }
676 exit(0);
677 }
678
679 /*
680 * child_writer
681 * The child process that continually (and slowly!!) grows
682 * the file. The purpose of this is to exercise the code
683 * supporting mapping of fragments. The map children are
684 * constantly reforking and will pick up the map changes, etc.
685 * This process executes until signalled (i.e. has no exit!)
686 * unless error.
687 */
688 void child_writer(char *file, uchar_t * buf)
689 { /* buf already set up in main */
690 struct sigaction sa_writer;
691
692 sa_writer.sa_handler = clean_writer;
693 sa_writer.sa_flags = 0;
694 if (sigemptyset(&sa_writer.sa_mask)) {
695 perror("sigempty error");
696 anyfail();
697 }
698
699 if (sigaction(SIGUSR1, &sa_writer, 0) == -1) {
700 perror("sigaction error SIGUSR1");
701 anyfail();
702 }
703 #ifdef LARGE_FILE
704 struct stat64 statbuf;
705 off64_t off;
706 #else /* LARGE_FILE */
707 struct stat statbuf;
708 off_t off;
709 #endif /* LARGE_FILE */
710 int pagesize = sysconf(_SC_PAGE_SIZE);
711 uchar_t *p;
712 int cnt;
713
714 #ifdef LARGE_FILE
715 if ((fd_writer = open64(file, O_RDWR)) == -1) {
716 #else /* LARGE_FILE */
717 if ((fd_writer = open(file, O_RDWR)) == -1) {
718 #endif /* LARGE_FILE */
719 perror("open error");
720 anyfail();
721 }
722 #ifdef LARGE_FILE
723 if ((off = lseek64(fd_writer, 0, SEEK_END)) == -1) {
724 #else /* LARGE_FILE */
725 if ((off = lseek(fd_writer, 0, SEEK_END)) == -1) {
726 #endif /* LARGE_FILE */
727 perror("lseek error");
728 anyfail();
729 }
730
731 for (;;) {
732 #ifdef LARGE_FILE
733 if (fstat64(fd_writer, &statbuf) == -1) {
734 #else /* LARGE_FILE */
735 if (fstat(fd_writer, &statbuf) == -1) {
736 #endif /* LARGE_FILE */
737 perror("fstat error");
738 anyfail();
739 }
740 #ifdef LARGE_FILE
741 if (debug)
742 (void)printf("writer %d bytes at off %Ld, size %Ld\n",
743 growsize, off, statbuf.st_size);
744 #else /* LARGE_FILE */
745 if (debug)
746 (void)printf("writer %d bytes at off %ld, size %ld\n",
747 growsize, off, statbuf.st_size);
748 #endif /* LARGE_FILE */
749
750 /*
751 * Write some number of bytes, then sleep some
752 * number of seconds...
753 * Need to keep track of our offset so write the
754 * right bytes.
755 */
756
757 p = buf + (off % pagesize);
758
759 if ((cnt = write(fd_writer, p, growsize)) != growsize) {
760 if (cnt == -1)
761 perror("write error");
762 else
763 (void)fprintf(stderr, "wrote %d of %d bytes\n",
764 cnt, growsize);
765 anyfail();
766 }
767
768 off += growsize;
769
770 (void)sleep(sleeptime);
771 if (dosync) {
772 if (fsync(fd_writer) == -1) {
773 perror("fsync error");
774 anyfail();
775 }
776 }
777 }
778 close(fd_writer);
779 }
780
781 /*
782 * Make sure file has all the correct data.
783
784 */
785 int fileokay(char *file, uchar_t * expbuf)
786 {
787 #ifdef LARGE_FILE
788 struct stat64 statbuf;
789 #else /* LARGE_FILE */
790 struct stat statbuf;
791 #endif /* LARGE_FILE */
792 size_t mapsize;
793 uchar_t *readbuf;
794 unsigned mappages;
795 unsigned pagesize = sysconf(_SC_PAGE_SIZE);
796 int fd;
797 int cnt;
798 unsigned i, j;
799
800 #ifdef LARGE_FILE
801 if ((fd = open64(file, O_RDONLY)) == -1) {
802 #else /* LARGE_FILE */
803 if ((fd = open(file, O_RDONLY)) == -1) {
804 #endif /* LARGE_FILE */
805 perror("open error");
806 anyfail();
807 }
808 #ifdef LARGE_FILE
809 if (fstat64(fd, &statbuf) == -1) {
810 #else /* LARGE_FILE */
811 if (fstat(fd, &statbuf) == -1) {
812 #endif /* LARGE_FILE */
813 perror("stat error");
814 anyfail();
815 }
816 #ifdef LARGE_FILE
817 if (lseek64(fd, sparseoffset, SEEK_SET) < 0) {
818 #else /* LARGE_FILE */
819 if (lseek(fd, sparseoffset, SEEK_SET) < 0) {
820 #endif /* LARGE_FILE */
821 perror("lseek");
822 exit(1);
823 }
824
825 readbuf = malloc(pagesize);
826
827 if (statbuf.st_size - sparseoffset > SIZE_MAX) {
828 fprintf(stderr, "size_t overflow when setting up map\n");
829 exit(1);
830 }
831 mapsize = (size_t) (statbuf.st_size - sparseoffset);
832 mappages = roundup(mapsize, pagesize) / pagesize;
833
834 for (i = 0; i < mappages; i++) {
835 cnt = read(fd, (char *)readbuf, pagesize);
836 if (cnt == -1) {
837 perror("read error");
838 close(fd);
839 return 0;
840 } else if (cnt != pagesize) {
841 /*
842 * Okay if at last page in file...
843 */
844 if ((i * pagesize) + cnt != mapsize) {
845 (void)fprintf(stderr, "read %d of %ld bytes\n",
846 (i * pagesize) + cnt,
847 (long)mapsize);
848 close(fd);
849 return 0;
850 }
851 }
852 /*
853 * Compare read bytes of data.
854 * May have zeros from map extend...
855 */
856 for (j = 0; j < cnt; j++) {
857 if (expbuf[j] != readbuf[j] && readbuf[j] != 0) {
858 (void)fprintf(stderr,
859 "read bad data: exp %c got %c",
860 expbuf[j], readbuf[j]);
861 #ifdef LARGE_FILE
862 (void)fprintf(stderr, ", pg %d off %d, "
863 "(fsize %Ld)\n", i, j,
864 statbuf.st_size);
865 #else /* LARGE_FILE */
866 (void)fprintf(stderr, ", pg %d off %d, "
867 "(fsize %ld)\n", i, j,
868 statbuf.st_size);
869 #endif /* LARGE_FILE */
870 close(fd);
871 return 0;
872 }
873 }
874 }
875
876 close(fd);
877 return 1;
878 }
879
880 /*ARGSUSED*/ void finish(int sig)
881 {
882 finished++;
883 /* finish nicely and check the file contents */
884 }
885
886 /*ARGSUSED*/ void clean_up_file(int sig)
887 {
888 if (!leavefile)
889 (void)unlink(filename);
890 _exit(1);
891 }
892
893 void clean_mapper(int sig)
894 {
895 if (fd_mapper)
896 close(fd_mapper);
897 munmap(maddr_mapper, mapsize_mapper);
898 _exit(0);
899 }
900
901 void clean_writer(int sig)
902 {
903 if (fd_writer)
904 close(fd_writer);
905 _exit(0);
906 }
907
908 unsigned int initrand(void)
909 {
910 unsigned int seed;
911
912 /*
913 * Initialize random seed... Got this from a test written
914 * by scooter:
915 * Use srand/rand to diffuse the information from the
916 * time and pid. If you start several processes, then
917 * the time and pid information don't provide much
918 * variation.
919 */
920 srand((unsigned int)getpid());
921 seed = rand();
922 srand((unsigned int)time(NULL));
923 seed = (seed ^ rand()) % 100000;
924 srand48((long int)seed);
925 return (seed);
926 }
927
928 /***** LTP Port *****/
929 void ok_exit(void)
930 {
931 tst_resm(TPASS, "Test passed\n");
932 tst_rmdir();
933 tst_exit();
934 }
935
936 int anyfail(void)
937 {
938 tst_brkm(TFAIL, tst_rmdir, "Test failed\n");
939 }
940
941 /***** ** ** *****/
942