1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2002
4 * Copyright (c) Cyril Hrubis chrubis@suse.cz 2009
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 * the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /*
22 * NAME
23 * ftest05.c -- test file I/O (ported from SPIE, section2/filesuite/ftest6.c, by Airong Zhang)
24 *
25 * this is the same as ftest1, except that it uses lseek64
26 *
27 * CALLS
28 * lseek64, read, write
29 * truncate, ftruncate, fsync, sync, fstat
30 *
31 * ALGORITHM
32 * A bitmap is used to map pieces of a file.
33 * Loop: pick a random piece of the file
34 * if we haven't seen it before make sure it is zero,
35 * write pattern
36 * if we have seen it before make sure correct pattern.
37 *
38 * This was originally written by rbk - was program tfio.c
39 * Modified by dale to integrate with test suites.
40 *
41 * RESTRICTIONS
42 * Runs a long time with default args - can take others on input
43 * line. Use with "term mode".
44 * If run on vax the ftruncate will not be random - will always go to
45 * start of file. NOTE: produces a very high load average!!
46 *
47 * CAUTION!!
48 * If a file is supplied to this program with the "-f" option
49 * it will be removed with a system("rm -rf filename") call.
50 *
51 */
52
53 #define _XOPEN_SOURCE 500
54 #define _LARGEFILE64_SOURCE 1
55 #include <stdio.h>
56 #include <sys/types.h>
57 #include <sys/wait.h>
58 #include <sys/stat.h>
59 #include <errno.h>
60 #include <fcntl.h>
61 #include <signal.h>
62 #include <unistd.h>
63 #include <inttypes.h>
64 #include <sys/param.h>
65 #include "test.h"
66 #include "safe_macros.h"
67 #include "libftest.h"
68
69 char *TCID = "ftest05";
70 int TST_TOTAL = 1;
71
72 static void setup(void);
73 static void runtest();
74 static void dotest(int, int, int);
75 static void domisc(int, int, char *);
76 static void term(int sig);
77 static void cleanup(void);
78
79 #define PASSED 1
80 #define FAILED 0
81
82 #define MAXCHILD 25
83 #define K_1 1024
84 #define K_2 2048
85 #define K_4 4096
86
87 static int csize; /* chunk size */
88 static int iterations; /* # total iterations */
89 static off64_t max_size; /* max file size */
90 static const int misc_intvl = 10; /* for doing misc things; 0 ==> no */
91 static int nchild; /* how many children */
92 static int fd; /* file descriptor used by child */
93 static int parent_pid;
94 static int pidlist[MAXCHILD];
95 static char test_name[2]; /* childs test directory name */
96
97 static char fuss[MAXPATHLEN]; /* directory to do this in */
98 static char homedir[MAXPATHLEN]; /* where we started */
99
100 static int local_flag;
101
main(int ac,char * av[])102 int main(int ac, char *av[])
103 {
104 int lc;
105
106 tst_parse_opts(ac, av, NULL, NULL);
107
108 setup();
109
110 local_flag = PASSED;
111
112 for (lc = 0; TEST_LOOPING(lc); lc++) {
113
114 runtest();
115
116 if (local_flag == PASSED)
117 tst_resm(TPASS, "Test passed.");
118 else
119 tst_resm(TFAIL, "Test failed.");
120 }
121
122 cleanup();
123 return 1;
124 }
125
setup(void)126 static void setup(void)
127 {
128 /*
129 * Make a directory to do this in; ignore error if already exists.
130 * Save starting directory.
131 */
132 tst_tmpdir();
133 getcwd(homedir, sizeof(homedir));
134 parent_pid = getpid();
135
136 if (!fuss[0])
137 sprintf(fuss, "./ftest05.%d", getpid());
138
139 mkdir(fuss, 0755);
140
141 SAFE_CHDIR(NULL, fuss);
142
143 /*
144 * Default values for run conditions.
145 */
146 iterations = 10;
147 nchild = 5;
148 csize = K_2; /* should run with 1, 2, and 4 K sizes */
149 max_size = K_1 * K_1;
150
151 if (sigset(SIGTERM, term) == SIG_ERR) {
152 tst_brkm(TBROK | TERRNO, NULL,
153 "sigset (signo = SIGTERM) failed");
154 }
155
156 local_flag = PASSED;
157 }
158
runtest(void)159 static void runtest(void)
160 {
161 int child, count, i, nwait, pid, status;
162
163 nwait = 0;
164
165 for (i = 0; i < nchild; i++) {
166 test_name[0] = 'a' + i;
167 test_name[1] = '\0';
168 fd = SAFE_OPEN(NULL, test_name, O_RDWR | O_CREAT | O_TRUNC,
169 0666);
170
171 if ((child = fork()) == 0) {
172 dotest(nchild, i, fd);
173 tst_exit();
174 }
175
176 close(fd);
177
178 if (child < 0) {
179 tst_brkm(TBROK | TERRNO, NULL, "fork failed");
180 } else {
181 pidlist[i] = child;
182 nwait++;
183 }
184 }
185
186 /*
187 * Wait for children to finish.
188 */
189 count = 0;
190 while (1) {
191 if ((child = wait(&status)) >= 0) {
192 if (status != 0) {
193 tst_resm(TFAIL,
194 "\tTest{%d} failed, expected 0 exit.",
195 child);
196 local_flag = FAILED;
197 }
198 ++count;
199 } else if (errno != EINTR)
200 break;
201 }
202
203 /*
204 * Should have collected all children.
205 */
206 if (count != nwait) {
207 tst_resm(TFAIL, "\tWrong # children waited on, count = %d",
208 count);
209 local_flag = FAILED;
210 }
211
212 chdir(homedir);
213 pid = fork();
214
215 if (pid < 0) {
216 tst_brkm(TBROK | TERRNO, sync, "fork failed");
217 tst_exit();
218 }
219
220 if (pid == 0) {
221 execl("/bin/rm", "rm", "-rf", fuss, NULL);
222 exit(1);
223 }
224
225 wait(&status);
226
227 if (status) {
228 tst_resm(TINFO, "CAUTION - ftest05, '%s' may not be removed",
229 fuss);
230 }
231
232 sync();
233 }
234
235 /*
236 * dotest()
237 * Children execute this.
238 *
239 * Randomly read/mod/write chunks with known pattern and check.
240 * When fill sectors, iterate.
241 */
242
243 #define NMISC 4
244 enum m_type { m_fsync, m_trunc, m_sync, m_fstat };
245 char *m_str[] = { "fsync", "trunc", "sync", "fstat" };
246
247 int misc_cnt[NMISC]; /* counts # of each kind of misc */
248 int file_max; /* file-max size */
249 int nchunks;
250 int last_trunc = -1;
251 int tr_flag;
252 enum m_type type = m_fsync;
253
254 #define CHUNK(i) (((off64_t)i) * csize)
255 #define NEXTMISC ((rand() % misc_intvl) + 5)
256
dotest(int testers,int me,int fd)257 static void dotest(int testers, int me, int fd)
258 {
259 int i, count, collide, chunk, whenmisc, xfr;
260 char *bits, *hold_bits, *buf, *val_buf, *zero_buf;
261 char val;
262 struct stat stat;
263
264 nchunks = max_size / csize;
265
266 if ((bits = calloc((nchunks + 7) / 8, 1)) == NULL) {
267 perror("\tmalloc (bits)");
268 exit(1);
269 }
270
271 if ((hold_bits = calloc((nchunks + 7) / 8, 1)) == NULL) {
272 perror("\tmalloc (bold_bits)");
273 exit(1);
274 }
275
276 if ((buf = (calloc(csize, 1))) == NULL) {
277 perror("\tmalloc (buf)");
278 exit(1);
279 }
280
281 if ((val_buf = (calloc(csize, 1))) == NULL) {
282 perror("\tmalloc (val_buf)");
283 exit(1);
284 }
285
286 if ((zero_buf = (calloc(csize, 1))) == NULL) {
287 perror("\tmalloc (zero_buf)");
288 exit(1);
289 }
290
291 /*
292 * No init sectors; allow file to be sparse.
293 */
294 val = (64 / testers) * me + 1;
295
296 /*
297 * For each iteration:
298 * zap bits array
299 * loop:
300 * pick random chunk, read it.
301 * if corresponding bit off {
302 * verify == 0. (sparse file)
303 * ++count;
304 * } else
305 * verify == val.
306 * write "val" on it.
307 * repeat until count = nchunks.
308 * ++val.
309 */
310
311 srand(getpid());
312 if (misc_intvl)
313 whenmisc = NEXTMISC;
314 while (iterations-- > 0) {
315 for (i = 0; i < NMISC; i++)
316 misc_cnt[i] = 0;
317 ftruncate(fd, 0);
318 file_max = 0;
319 memset(bits, 0, (nchunks + 7) / 8);
320 memset(hold_bits, 0, (nchunks + 7) / 8);
321 memset(val_buf, val, csize);
322 memset(zero_buf, 0, csize);
323 count = 0;
324 collide = 0;
325 while (count < nchunks) {
326 chunk = rand() % nchunks;
327 /*
328 * Read it.
329 */
330 if (lseek64(fd, CHUNK(chunk), 0) < (off64_t) 0) {
331 tst_brkm(TFAIL | TERRNO, NULL,
332 "\tTest[%d]: lseek64(0) fail at %Lx",
333 me, CHUNK(chunk));
334 }
335 if ((xfr = read(fd, buf, csize)) < 0) {
336 tst_brkm(TFAIL | TERRNO, NULL,
337 "\tTest[%d]: read fail at %Lx",
338 me, CHUNK(chunk));
339 }
340 /*
341 * If chunk beyond EOF just write on it.
342 * Else if bit off, haven't seen it yet.
343 * Else, have. Verify values.
344 */
345 //printf("%li %d", CHUNK(chunk), file_max );
346 if (CHUNK(chunk) >= file_max) {
347 bits[chunk / 8] |= (1 << (chunk % 8));
348 ++count;
349 } else if ((bits[chunk / 8] & (1 << (chunk % 8))) == 0) {
350 if (xfr != csize) {
351 //tst_resm(TINFO, "\tTest[%d]: xfr=%d != %d, zero read.",
352 // me, xfr, csize);
353 tst_exit();
354 }
355 if (memcmp(buf, zero_buf, csize)) {
356 tst_resm(TFAIL,
357 "\tTest[%d] bad verify @ 0x%Lx for val %d count %d xfr %d file_max 0x%x, should be %d.",
358 me, CHUNK(chunk), val, count,
359 xfr, file_max, zero_buf[0]);
360 tst_resm(TINFO,
361 "\tTest[%d]: last_trunc = 0x%x",
362 me, last_trunc);
363 fstat(fd, &stat);
364 tst_resm(TINFO,
365 "\tStat: size=%llx, ino=%x",
366 stat.st_size, (unsigned)stat.st_ino);
367 sync();
368 ft_dumpbuf(buf, csize);
369 ft_dumpbits(bits, (nchunks + 7) / 8);
370 ft_orbits(hold_bits, bits,
371 (nchunks + 7) / 8);
372 tst_resm(TINFO, "\tHold ");
373 ft_dumpbits(hold_bits,
374 (nchunks + 7) / 8);
375 tst_exit();
376 }
377 bits[chunk / 8] |= (1 << (chunk % 8));
378 ++count;
379 } else {
380 if (xfr != csize) {
381 tst_brkm(TFAIL, NULL,
382 "\tTest[%d]: xfr=%d != %d, val read.",
383 me, xfr, csize);
384 }
385 ++collide;
386 if (memcmp(buf, val_buf, csize)) {
387 tst_resm(TFAIL,
388 "\tTest[%d] bad verify @ 0x%Lx for val %d count %d xfr %d file_max 0x%x.",
389 me, CHUNK(chunk), val, count,
390 xfr, file_max);
391 tst_resm(TINFO,
392 "\tTest[%d]: last_trunc = 0x%x",
393 me, last_trunc);
394 fstat(fd, &stat);
395 tst_resm(TINFO,
396 "\tStat: size=%llx, ino=%x",
397 stat.st_size, (unsigned)stat.st_ino);
398 sync();
399 ft_dumpbuf(buf, csize);
400 ft_dumpbits(bits, (nchunks + 7) / 8);
401 ft_orbits(hold_bits, bits,
402 (nchunks + 7) / 8);
403 tst_resm(TINFO, "\tHold ");
404 ft_dumpbits(hold_bits,
405 (nchunks + 7) / 8);
406 tst_exit();
407 }
408 }
409 /*
410 * Write it.
411 */
412 if (lseek64(fd, -((off64_t) xfr), 1) < (off64_t) 0) {
413 tst_brkm(TFAIL | TERRNO, NULL,
414 "\tTest[%d]: lseek64(1) fail at %Lx",
415 me, CHUNK(chunk));
416 }
417 if ((xfr = write(fd, val_buf, csize)) < csize) {
418 if (errno == ENOSPC) {
419 tst_resm(TFAIL,
420 "\tTest[%d]: no space, exiting.",
421 me);
422 fsync(fd);
423 } else {
424 tst_resm(TFAIL | TERRNO,
425 "\tTest[%d]: write fail at %Lx xfr %d",
426 me, CHUNK(chunk), xfr);
427 }
428 tst_exit();
429 }
430 if (CHUNK(chunk) + csize > file_max)
431 file_max = CHUNK(chunk) + csize;
432 /*
433 * If hit "misc" interval, do it.
434 */
435 if (misc_intvl && --whenmisc <= 0) {
436 ft_orbits(hold_bits, bits, (nchunks + 7) / 8);
437 domisc(me, fd, bits);
438 whenmisc = NEXTMISC;
439 }
440 if (count + collide > 2 * nchunks)
441 break;
442 }
443
444 /*
445 * End of iteration, maybe before doing all chunks.
446 */
447
448 fsync(fd);
449 ++misc_cnt[m_fsync];
450 //tst_resm(TINFO, "\tTest{%d} val %d done, count = %d, collide = {%d}",
451 // me, val, count, collide);
452 //for (i = 0; i < NMISC; i++)
453 // tst_resm(TINFO, "\t\tTest{%d}: {%d} %s's.", me, misc_cnt[i], m_str[i]);
454 ++val;
455 }
456 }
457
458 /*
459 * domisc()
460 * Inject misc syscalls into the thing.
461 */
domisc(int me,int fd,char * bits)462 static void domisc(int me, int fd, char *bits)
463 {
464 int chunk;
465 struct stat sb;
466
467 if (type > m_fstat)
468 type = m_fsync;
469
470 switch (type) {
471 case m_fsync:
472 if (fsync(fd) < 0) {
473 tst_resm(TFAIL | TERRNO, "\tTest[%d]: fsync error", me);
474 }
475 break;
476 case m_trunc:
477 chunk = rand() % (file_max / csize);
478 file_max = CHUNK(chunk);
479 last_trunc = file_max;
480 if (tr_flag) {
481 if (ftruncate(fd, file_max) < 0) {
482 tst_brkm(TFAIL | TERRNO, NULL,
483 "\tTest[%d]: ftruncate error @ 0x%x.",
484 me, file_max);
485 }
486 tr_flag = 0;
487 } else {
488 if (truncate(test_name, file_max) < 0) {
489 tst_brkm(TFAIL | TERRNO, NULL,
490 "\tTest[%d]: truncate error @ 0x%x.",
491 me, file_max);
492 }
493 tr_flag = 1;
494 }
495 for (; chunk % 8 != 0; chunk++)
496 bits[chunk / 8] &= ~(1 << (chunk % 8));
497 for (; chunk < nchunks; chunk += 8)
498 bits[chunk / 8] = 0;
499 break;
500 case m_sync:
501 sync();
502 break;
503 case m_fstat:
504 if (fstat(fd, &sb) < 0) {
505 tst_brkm(TFAIL | TERRNO, NULL,
506 "\tTest[%d]: fstat() error.", me);
507 }
508 if (sb.st_size != file_max) {
509 tst_brkm(TFAIL, NULL,
510 "\tTest[%d]: fstat() mismatch; st_size=%"
511 PRIx64 ",file_max=%x.", me,
512 (int64_t) sb.st_size, file_max);
513 }
514 break;
515 }
516 ++misc_cnt[type];
517 ++type;
518 }
519
520 /* term()
521 *
522 * This is called when a SIGTERM signal arrives.
523 */
term(int sig LTP_ATTRIBUTE_UNUSED)524 static void term(int sig LTP_ATTRIBUTE_UNUSED)
525 {
526 int i;
527
528 tst_resm(TINFO, "\tterm -[%d]- got sig term.", getpid());
529
530 /*
531 * If run by hand we like to have the parent send the signal to
532 * the child processes. This makes life easy.
533 */
534 if (parent_pid == getpid()) {
535 for (i = 0; i < nchild; i++)
536 if (pidlist[i]) /* avoid embarassment */
537 kill(pidlist[i], SIGTERM);
538 return;
539 }
540
541 tst_resm(TINFO, "\tunlinking '%s'", test_name);
542
543 close(fd);
544
545 if (unlink(test_name))
546 tst_resm(TBROK, "Unlink of '%s' failed, errno = %d.",
547 test_name, errno);
548 else
549 tst_resm(TINFO, "Unlink of '%s' successful.", test_name);
550
551 tst_exit();
552 }
553
cleanup(void)554 static void cleanup(void)
555 {
556
557 tst_rmdir();
558 tst_exit();
559 }
560