7cbce1327f8f21edb32159376be406841016ef62
[fio.git] / filesetup.c
1 #include <unistd.h>
2 #include <fcntl.h>
3 #include <string.h>
4 #include <assert.h>
5 #include <dirent.h>
6 #include <libgen.h>
7 #include <sys/stat.h>
8 #include <sys/mman.h>
9 #include <sys/types.h>
10
11 #include "fio.h"
12 #include "smalloc.h"
13 #include "filehash.h"
14 #include "options.h"
15 #include "os/os.h"
16 #include "hash.h"
17 #include "lib/axmap.h"
18 #include "rwlock.h"
19
20 #ifdef CONFIG_LINUX_FALLOCATE
21 #include <linux/falloc.h>
22 #endif
23
24 static FLIST_HEAD(filename_list);
25
26 /*
27  * List entry for filename_list
28  */
29 struct file_name {
30         struct flist_head list;
31         char *filename;
32 };
33
34 static inline void clear_error(struct thread_data *td)
35 {
36         td->error = 0;
37         td->verror[0] = '\0';
38 }
39
40 static int native_fallocate(struct thread_data *td, struct fio_file *f)
41 {
42         bool success;
43
44         success = fio_fallocate(f, 0, f->real_file_size);
45         dprint(FD_FILE, "native fallocate of file %s size %llu was "
46                         "%ssuccessful\n", f->file_name,
47                         (unsigned long long) f->real_file_size,
48                         !success ? "un": "");
49
50         if (success)
51                 return false;
52
53         if (errno == ENOSYS)
54                 dprint(FD_FILE, "native fallocate is not implemented\n");
55
56         return true;
57 }
58
59 static void fallocate_file(struct thread_data *td, struct fio_file *f)
60 {
61         if (td->o.fill_device)
62                 return;
63
64         switch (td->o.fallocate_mode) {
65         case FIO_FALLOCATE_NATIVE:
66                 native_fallocate(td, f);
67                 break;
68         case FIO_FALLOCATE_NONE:
69                 break;
70 #ifdef CONFIG_POSIX_FALLOCATE
71         case FIO_FALLOCATE_POSIX: {
72                 int r;
73
74                 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
75                                  f->file_name,
76                                  (unsigned long long) f->real_file_size);
77
78                 r = posix_fallocate(f->fd, 0, f->real_file_size);
79                 if (r > 0)
80                         log_err("fio: posix_fallocate fails: %s\n", strerror(r));
81                 break;
82                 }
83 #endif /* CONFIG_POSIX_FALLOCATE */
84 #ifdef CONFIG_LINUX_FALLOCATE
85         case FIO_FALLOCATE_KEEP_SIZE: {
86                 int r;
87
88                 dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
89                                 "file %s size %llu\n", f->file_name,
90                                 (unsigned long long) f->real_file_size);
91
92                 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
93                 if (r != 0)
94                         td_verror(td, errno, "fallocate");
95
96                 break;
97                 }
98 #endif /* CONFIG_LINUX_FALLOCATE */
99         default:
100                 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
101                 assert(0);
102         }
103 }
104
105 /*
106  * Leaves f->fd open on success, caller must close
107  */
108 static int extend_file(struct thread_data *td, struct fio_file *f)
109 {
110         int new_layout = 0, unlink_file = 0, flags;
111         unsigned long long left;
112         unsigned int bs;
113         char *b = NULL;
114
115         if (read_only) {
116                 log_err("fio: refusing extend of file due to read-only\n");
117                 return 0;
118         }
119
120         /*
121          * check if we need to lay the file out complete again. fio
122          * does that for operations involving reads, or for writes
123          * where overwrite is set
124          */
125         if (td_read(td) ||
126            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
127             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
128                 new_layout = 1;
129         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
130                 unlink_file = 1;
131
132         if (unlink_file || new_layout) {
133                 int ret;
134
135                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
136
137                 ret = td_io_unlink_file(td, f);
138                 if (ret != 0 && ret != ENOENT) {
139                         td_verror(td, errno, "unlink");
140                         return 1;
141                 }
142         }
143
144         flags = O_WRONLY;
145         if (td->o.allow_create)
146                 flags |= O_CREAT;
147         if (new_layout)
148                 flags |= O_TRUNC;
149
150 #ifdef WIN32
151         flags |= _O_BINARY;
152 #endif
153
154         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
155         f->fd = open(f->file_name, flags, 0644);
156         if (f->fd < 0) {
157                 int err = errno;
158
159                 if (err == ENOENT && !td->o.allow_create)
160                         log_err("fio: file creation disallowed by "
161                                         "allow_file_create=0\n");
162                 else
163                         td_verror(td, err, "open");
164                 return 1;
165         }
166
167         fallocate_file(td, f);
168
169         /*
170          * If our jobs don't require regular files initially, we're done.
171          */
172         if (!new_layout)
173                 goto done;
174
175         /*
176          * The size will be -1ULL when fill_device is used, so don't truncate
177          * or fallocate this file, just write it
178          */
179         if (!td->o.fill_device) {
180                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
181                                         (unsigned long long) f->real_file_size);
182                 if (ftruncate(f->fd, f->real_file_size) == -1) {
183                         if (errno != EFBIG) {
184                                 td_verror(td, errno, "ftruncate");
185                                 goto err;
186                         }
187                 }
188         }
189
190         left = f->real_file_size;
191         bs = td->o.max_bs[DDIR_WRITE];
192         if (bs > left)
193                 bs = left;
194
195         b = malloc(bs);
196         if (!b) {
197                 td_verror(td, errno, "malloc");
198                 goto err;
199         }
200
201         while (left && !td->terminate) {
202                 ssize_t r;
203
204                 if (bs > left)
205                         bs = left;
206
207                 fill_io_buffer(td, b, bs, bs);
208
209                 r = write(f->fd, b, bs);
210
211                 if (r > 0) {
212                         left -= r;
213                         continue;
214                 } else {
215                         if (r < 0) {
216                                 int __e = errno;
217
218                                 if (__e == ENOSPC) {
219                                         if (td->o.fill_device)
220                                                 break;
221                                         log_info("fio: ENOSPC on laying out "
222                                                  "file, stopping\n");
223                                         break;
224                                 }
225                                 td_verror(td, errno, "write");
226                         } else
227                                 td_verror(td, EIO, "write");
228
229                         break;
230                 }
231         }
232
233         if (td->terminate) {
234                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
235                 td_io_unlink_file(td, f);
236         } else if (td->o.create_fsync) {
237                 if (fsync(f->fd) < 0) {
238                         td_verror(td, errno, "fsync");
239                         goto err;
240                 }
241         }
242         if (td->o.fill_device && !td_write(td)) {
243                 fio_file_clear_size_known(f);
244                 if (td_io_get_file_size(td, f))
245                         goto err;
246                 if (f->io_size > f->real_file_size)
247                         f->io_size = f->real_file_size;
248         }
249
250         free(b);
251 done:
252         return 0;
253 err:
254         close(f->fd);
255         f->fd = -1;
256         if (b)
257                 free(b);
258         return 1;
259 }
260
261 static bool pre_read_file(struct thread_data *td, struct fio_file *f)
262 {
263         int r, did_open = 0, old_runstate;
264         unsigned long long left;
265         unsigned int bs;
266         bool ret = true;
267         char *b;
268
269         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
270             td_ioengine_flagged(td, FIO_NOIO))
271                 return true;
272
273         if (f->filetype == FIO_TYPE_CHAR)
274                 return true;
275
276         if (!fio_file_open(f)) {
277                 if (td->io_ops->open_file(td, f)) {
278                         log_err("fio: cannot pre-read, failed to open file\n");
279                         return false;
280                 }
281                 did_open = 1;
282         }
283
284         old_runstate = td_bump_runstate(td, TD_PRE_READING);
285
286         left = f->io_size;
287         bs = td->o.max_bs[DDIR_READ];
288         if (bs > left)
289                 bs = left;
290
291         b = malloc(bs);
292         if (!b) {
293                 td_verror(td, errno, "malloc");
294                 ret = false;
295                 goto error;
296         }
297         memset(b, 0, bs);
298
299         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
300                 td_verror(td, errno, "lseek");
301                 log_err("fio: failed to lseek pre-read file\n");
302                 ret = false;
303                 goto error;
304         }
305
306         while (left && !td->terminate) {
307                 if (bs > left)
308                         bs = left;
309
310                 r = read(f->fd, b, bs);
311
312                 if (r == (int) bs) {
313                         left -= bs;
314                         continue;
315                 } else {
316                         td_verror(td, EIO, "pre_read");
317                         break;
318                 }
319         }
320
321 error:
322         td_restore_runstate(td, old_runstate);
323
324         if (did_open)
325                 td->io_ops->close_file(td, f);
326
327         free(b);
328         return ret;
329 }
330
331 unsigned long long get_rand_file_size(struct thread_data *td)
332 {
333         unsigned long long ret, sized;
334         uint64_t frand_max;
335         unsigned long r;
336
337         frand_max = rand_max(&td->file_size_state);
338         r = __rand(&td->file_size_state);
339         sized = td->o.file_size_high - td->o.file_size_low;
340         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
341         ret += td->o.file_size_low;
342         ret -= (ret % td->o.rw_min_bs);
343         return ret;
344 }
345
346 static int file_size(struct thread_data *td, struct fio_file *f)
347 {
348         struct stat st;
349
350         if (stat(f->file_name, &st) == -1) {
351                 td_verror(td, errno, "fstat");
352                 return 1;
353         }
354
355         f->real_file_size = st.st_size;
356         return 0;
357 }
358
359 static int bdev_size(struct thread_data *td, struct fio_file *f)
360 {
361         unsigned long long bytes = 0;
362         int r;
363
364         if (td->io_ops->open_file(td, f)) {
365                 log_err("fio: failed opening blockdev %s for size check\n",
366                         f->file_name);
367                 return 1;
368         }
369
370         r = blockdev_size(f, &bytes);
371         if (r) {
372                 td_verror(td, r, "blockdev_size");
373                 goto err;
374         }
375
376         if (!bytes) {
377                 log_err("%s: zero sized block device?\n", f->file_name);
378                 goto err;
379         }
380
381         f->real_file_size = bytes;
382         td->io_ops->close_file(td, f);
383         return 0;
384 err:
385         td->io_ops->close_file(td, f);
386         return 1;
387 }
388
389 static int char_size(struct thread_data *td, struct fio_file *f)
390 {
391 #ifdef FIO_HAVE_CHARDEV_SIZE
392         unsigned long long bytes = 0;
393         int r;
394
395         if (td->io_ops->open_file(td, f)) {
396                 log_err("fio: failed opening chardev %s for size check\n",
397                         f->file_name);
398                 return 1;
399         }
400
401         r = chardev_size(f, &bytes);
402         if (r) {
403                 td_verror(td, r, "chardev_size");
404                 goto err;
405         }
406
407         if (!bytes) {
408                 log_err("%s: zero sized char device?\n", f->file_name);
409                 goto err;
410         }
411
412         f->real_file_size = bytes;
413         td->io_ops->close_file(td, f);
414         return 0;
415 err:
416         td->io_ops->close_file(td, f);
417         return 1;
418 #else
419         f->real_file_size = -1ULL;
420         return 0;
421 #endif
422 }
423
424 static int get_file_size(struct thread_data *td, struct fio_file *f)
425 {
426         int ret = 0;
427
428         if (fio_file_size_known(f))
429                 return 0;
430
431         if (f->filetype == FIO_TYPE_FILE)
432                 ret = file_size(td, f);
433         else if (f->filetype == FIO_TYPE_BLOCK)
434                 ret = bdev_size(td, f);
435         else if (f->filetype == FIO_TYPE_CHAR)
436                 ret = char_size(td, f);
437         else {
438                 f->real_file_size = -1;
439                 log_info("%s: failed to get file size of %s\n", td->o.name,
440                                         f->file_name);
441                 return 1; /* avoid offset extends end error message */
442         }
443
444         /*
445          * Leave ->real_file_size with 0 since it could be expectation
446          * of initial setup for regular files.
447          */
448         if (ret)
449                 return ret;
450
451         /*
452          * ->file_offset normally hasn't been initialized yet, so this
453          * is basically always false unless ->real_file_size is -1, but
454          * if ->real_file_size is -1 this message doesn't make sense.
455          * As a result, this message is basically useless.
456          */
457         if (f->file_offset > f->real_file_size) {
458                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
459                                         (unsigned long long) f->file_offset,
460                                         (unsigned long long) f->real_file_size);
461                 return 1;
462         }
463
464         fio_file_set_size_known(f);
465         return 0;
466 }
467
468 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
469                                    unsigned long long off,
470                                    unsigned long long len)
471 {
472         int errval = 0, ret = 0;
473
474 #ifdef CONFIG_ESX
475         return 0;
476 #endif
477
478         if (len == -1ULL)
479                 len = f->io_size;
480         if (off == -1ULL)
481                 off = f->file_offset;
482
483         if (len == -1ULL || off == -1ULL)
484                 return 0;
485
486         if (td->io_ops->invalidate) {
487                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
488                         f->file_name);
489                 ret = td->io_ops->invalidate(td, f);
490                 if (ret < 0)
491                         errval = -ret;
492         } else if (td_ioengine_flagged(td, FIO_DISKLESSIO)) {
493                 dprint(FD_IO, "invalidate not supported by ioengine %s\n",
494                        td->io_ops->name);
495                 ret = 0;
496         } else if (f->filetype == FIO_TYPE_FILE) {
497                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
498                         f->file_name, off, len);
499                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
500                 if (ret)
501                         errval = ret;
502         } else if (f->filetype == FIO_TYPE_BLOCK) {
503                 int retry_count = 0;
504
505                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
506                 ret = blockdev_invalidate_cache(f);
507                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
508                         /*
509                          * Linux multipath devices reject ioctl while
510                          * the maps are being updated. That window can
511                          * last tens of milliseconds; we'll try up to
512                          * a quarter of a second.
513                          */
514                         usleep(10000);
515                         ret = blockdev_invalidate_cache(f);
516                 }
517                 if (ret < 0 && errno == EACCES && geteuid()) {
518                         if (!fio_did_warn(FIO_WARN_ROOT_FLUSH)) {
519                                 log_err("fio: only root may flush block "
520                                         "devices. Cache flush bypassed!\n");
521                         }
522                         ret = 0;
523                 }
524                 if (ret < 0)
525                         errval = errno;
526         } else if (f->filetype == FIO_TYPE_CHAR ||
527                    f->filetype == FIO_TYPE_PIPE) {
528                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
529                 ret = 0;
530         }
531
532         /*
533          * Cache flushing isn't a fatal condition, and we know it will
534          * happen on some platforms where we don't have the proper
535          * function to flush eg block device caches. So just warn and
536          * continue on our way.
537          */
538         if (errval)
539                 log_info("fio: cache invalidation of %s failed: %s\n",
540                          f->file_name, strerror(errval));
541
542         return 0;
543
544 }
545
546 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
547 {
548         if (!fio_file_open(f))
549                 return 0;
550
551         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
552 }
553
554 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
555 {
556         int ret = 0;
557
558         dprint(FD_FILE, "fd close %s\n", f->file_name);
559
560         remove_file_hash(f);
561
562         if (close(f->fd) < 0)
563                 ret = errno;
564
565         f->fd = -1;
566
567         if (f->shadow_fd != -1) {
568                 close(f->shadow_fd);
569                 f->shadow_fd = -1;
570         }
571
572         f->engine_pos = 0;
573         return ret;
574 }
575
576 int file_lookup_open(struct fio_file *f, int flags)
577 {
578         struct fio_file *__f;
579         int from_hash;
580
581         __f = lookup_file_hash(f->file_name);
582         if (__f) {
583                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
584                 f->lock = __f->lock;
585                 from_hash = 1;
586         } else {
587                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
588                 from_hash = 0;
589         }
590
591 #ifdef WIN32
592         flags |= _O_BINARY;
593 #endif
594
595         f->fd = open(f->file_name, flags, 0600);
596         return from_hash;
597 }
598
599 static int file_close_shadow_fds(struct thread_data *td)
600 {
601         struct fio_file *f;
602         int num_closed = 0;
603         unsigned int i;
604
605         for_each_file(td, f, i) {
606                 if (f->shadow_fd == -1)
607                         continue;
608
609                 close(f->shadow_fd);
610                 f->shadow_fd = -1;
611                 num_closed++;
612         }
613
614         return num_closed;
615 }
616
617 int generic_open_file(struct thread_data *td, struct fio_file *f)
618 {
619         int is_std = 0;
620         int flags = 0;
621         int from_hash = 0;
622
623         dprint(FD_FILE, "fd open %s\n", f->file_name);
624
625         if (!strcmp(f->file_name, "-")) {
626                 if (td_rw(td)) {
627                         log_err("fio: can't read/write to stdin/out\n");
628                         return 1;
629                 }
630                 is_std = 1;
631
632                 /*
633                  * move output logging to stderr, if we are writing to stdout
634                  */
635                 if (td_write(td))
636                         f_out = stderr;
637         }
638
639         if (td_trim(td))
640                 goto skip_flags;
641         if (td->o.odirect)
642                 flags |= OS_O_DIRECT;
643         if (td->o.oatomic) {
644                 if (!FIO_O_ATOMIC) {
645                         td_verror(td, EINVAL, "OS does not support atomic IO");
646                         return 1;
647                 }
648                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
649         }
650         if (td->o.sync_io)
651                 flags |= O_SYNC;
652         if (td->o.create_on_open && td->o.allow_create)
653                 flags |= O_CREAT;
654 skip_flags:
655         if (f->filetype != FIO_TYPE_FILE)
656                 flags |= FIO_O_NOATIME;
657
658 open_again:
659         if (td_write(td)) {
660                 if (!read_only)
661                         flags |= O_RDWR;
662
663                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
664                         flags |= O_CREAT;
665
666                 if (is_std)
667                         f->fd = dup(STDOUT_FILENO);
668                 else
669                         from_hash = file_lookup_open(f, flags);
670         } else if (td_read(td)) {
671                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
672                         flags |= O_RDWR;
673                 else
674                         flags |= O_RDONLY;
675
676                 if (is_std)
677                         f->fd = dup(STDIN_FILENO);
678                 else
679                         from_hash = file_lookup_open(f, flags);
680         } else if (td_trim(td)) {
681                 assert(!td_rw(td)); /* should have matched above */
682                 flags |= O_RDWR;
683                 from_hash = file_lookup_open(f, flags);
684         }
685
686         if (f->fd == -1) {
687                 char buf[FIO_VERROR_SIZE];
688                 int __e = errno;
689
690                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
691                         flags &= ~FIO_O_NOATIME;
692                         goto open_again;
693                 }
694                 if (__e == EMFILE && file_close_shadow_fds(td))
695                         goto open_again;
696
697                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
698
699                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
700                         log_err("fio: looks like your file system does not " \
701                                 "support direct=1/buffered=0\n");
702                 }
703
704                 td_verror(td, __e, buf);
705                 return 1;
706         }
707
708         if (!from_hash && f->fd != -1) {
709                 if (add_file_hash(f)) {
710                         int fio_unused ret;
711
712                         /*
713                          * Stash away descriptor for later close. This is to
714                          * work-around a "feature" on Linux, where a close of
715                          * an fd that has been opened for write will trigger
716                          * udev to call blkid to check partitions, fs id, etc.
717                          * That pollutes the device cache, which can slow down
718                          * unbuffered accesses.
719                          */
720                         if (f->shadow_fd == -1)
721                                 f->shadow_fd = f->fd;
722                         else {
723                                 /*
724                                  * OK to ignore, we haven't done anything
725                                  * with it
726                                  */
727                                 ret = generic_close_file(td, f);
728                         }
729                         goto open_again;
730                 }
731         }
732
733         return 0;
734 }
735
736 /*
737  * This function i.e. get_file_size() is the default .get_file_size
738  * implementation of majority of I/O engines.
739  */
740 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
741 {
742         return get_file_size(td, f);
743 }
744
745 /*
746  * open/close all files, so that ->real_file_size gets set
747  */
748 static int get_file_sizes(struct thread_data *td)
749 {
750         struct fio_file *f;
751         unsigned int i;
752         int err = 0;
753
754         for_each_file(td, f, i) {
755                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
756                                                                 f->file_name);
757
758                 if (td_io_get_file_size(td, f)) {
759                         if (td->error != ENOENT) {
760                                 log_err("%s\n", td->verror);
761                                 err = 1;
762                                 break;
763                         }
764                         clear_error(td);
765                 }
766
767                 /*
768                  * There are corner cases where we end up with -1 for
769                  * ->real_file_size due to unsupported file type, etc.
770                  * We then just set to size option value divided by number
771                  * of files, similar to the way file ->io_size is set.
772                  * stat(2) failure doesn't set ->real_file_size to -1.
773                  */
774                 if (f->real_file_size == -1ULL && td->o.size)
775                         f->real_file_size = td->o.size / td->o.nr_files;
776         }
777
778         return err;
779 }
780
781 struct fio_mount {
782         struct flist_head list;
783         const char *base;
784         char __base[256];
785         unsigned int key;
786 };
787
788 /*
789  * Get free number of bytes for each file on each unique mount.
790  */
791 static unsigned long long get_fs_free_counts(struct thread_data *td)
792 {
793         struct flist_head *n, *tmp;
794         unsigned long long ret = 0;
795         struct fio_mount *fm;
796         FLIST_HEAD(list);
797         struct fio_file *f;
798         unsigned int i;
799
800         for_each_file(td, f, i) {
801                 struct stat sb;
802                 char buf[256];
803
804                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
805                         if (f->real_file_size != -1ULL)
806                                 ret += f->real_file_size;
807                         continue;
808                 } else if (f->filetype != FIO_TYPE_FILE)
809                         continue;
810
811                 buf[255] = '\0';
812                 strncpy(buf, f->file_name, 255);
813
814                 if (stat(buf, &sb) < 0) {
815                         if (errno != ENOENT)
816                                 break;
817                         strcpy(buf, ".");
818                         if (stat(buf, &sb) < 0)
819                                 break;
820                 }
821
822                 fm = NULL;
823                 flist_for_each(n, &list) {
824                         fm = flist_entry(n, struct fio_mount, list);
825                         if (fm->key == sb.st_dev)
826                                 break;
827
828                         fm = NULL;
829                 }
830
831                 if (fm)
832                         continue;
833
834                 fm = calloc(1, sizeof(*fm));
835                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
836                 fm->base = basename(fm->__base);
837                 fm->key = sb.st_dev;
838                 flist_add(&fm->list, &list);
839         }
840
841         flist_for_each_safe(n, tmp, &list) {
842                 unsigned long long sz;
843
844                 fm = flist_entry(n, struct fio_mount, list);
845                 flist_del(&fm->list);
846
847                 sz = get_fs_free_size(fm->base);
848                 if (sz && sz != -1ULL)
849                         ret += sz;
850
851                 free(fm);
852         }
853
854         return ret;
855 }
856
857 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
858 {
859         struct thread_options *o = &td->o;
860         unsigned long long align_bs;
861         unsigned long long offset;
862
863         if (o->file_append && f->filetype == FIO_TYPE_FILE)
864                 return f->real_file_size;
865
866         if (o->start_offset_percent > 0) {
867                 /*
868                  * if offset_align is provided, set initial offset
869                  */
870                 if (fio_option_is_set(o, start_offset_align)) {
871                         align_bs = o->start_offset_align;
872                 } else {
873                         /* else take the minimum block size */
874                         align_bs = td_min_bs(td);
875                 }
876
877                 /* calculate the raw offset */
878                 offset = (f->real_file_size * o->start_offset_percent / 100) +
879                         (td->subjob_number * o->offset_increment);
880
881                 /*
882                  * block align the offset at the next available boundary at
883                  * ceiling(offset / align_bs) * align_bs
884                  */
885                 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
886
887         } else {
888                 /* start_offset_percent not set */
889                 offset = o->start_offset +
890                                 td->subjob_number * o->offset_increment;
891         }
892
893         return offset;
894 }
895
896 /*
897  * Open the files and setup files sizes, creating files if necessary.
898  */
899 int setup_files(struct thread_data *td)
900 {
901         unsigned long long total_size, extend_size;
902         struct thread_options *o = &td->o;
903         struct fio_file *f;
904         unsigned int i, nr_fs_extra = 0;
905         int err = 0, need_extend;
906         int old_state;
907         const unsigned int bs = td_min_bs(td);
908         uint64_t fs = 0;
909
910         dprint(FD_FILE, "setup files\n");
911
912         old_state = td_bump_runstate(td, TD_SETTING_UP);
913
914         if (o->read_iolog_file)
915                 goto done;
916
917         /*
918          * Find out physical size of files or devices for this thread,
919          * before we determine I/O size and range of our targets.
920          * If ioengine defines a setup() method, it's responsible for
921          * opening the files and setting f->real_file_size to indicate
922          * the valid range for that file.
923          */
924         if (td->io_ops->setup)
925                 err = td->io_ops->setup(td);
926         else
927                 err = get_file_sizes(td);
928
929         if (err)
930                 goto err_out;
931
932         /*
933          * check sizes. if the files/devices do not exist and the size
934          * isn't passed to fio, abort.
935          */
936         total_size = 0;
937         for_each_file(td, f, i) {
938                 f->fileno = i;
939                 if (f->real_file_size == -1ULL)
940                         total_size = -1ULL;
941                 else
942                         total_size += f->real_file_size;
943         }
944
945         if (o->fill_device)
946                 td->fill_device_size = get_fs_free_counts(td);
947
948         /*
949          * device/file sizes are zero and no size given, punt
950          */
951         if ((!total_size || total_size == -1ULL) && !o->size &&
952             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
953             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
954                 log_err("%s: you need to specify size=\n", o->name);
955                 td_verror(td, EINVAL, "total_file_size");
956                 goto err_out;
957         }
958
959         /*
960          * Calculate per-file size and potential extra size for the
961          * first files, if needed (i.e. if we don't have a fixed size).
962          */
963         if (!o->file_size_low && o->nr_files) {
964                 uint64_t all_fs;
965
966                 fs = o->size / o->nr_files;
967                 all_fs = fs * o->nr_files;
968
969                 if (all_fs < o->size)
970                         nr_fs_extra = (o->size - all_fs) / bs;
971         }
972
973         /*
974          * now file sizes are known, so we can set ->io_size. if size= is
975          * not given, ->io_size is just equal to ->real_file_size. if size
976          * is given, ->io_size is size / nr_files.
977          */
978         extend_size = total_size = 0;
979         need_extend = 0;
980         for_each_file(td, f, i) {
981                 f->file_offset = get_start_offset(td, f);
982
983                 /*
984                  * Update ->io_size depending on options specified.
985                  * ->file_size_low being 0 means filesize option isn't set.
986                  * Non zero ->file_size_low equals ->file_size_high means
987                  * filesize option is set in a fixed size format.
988                  * Non zero ->file_size_low not equals ->file_size_high means
989                  * filesize option is set in a range format.
990                  */
991                 if (!o->file_size_low) {
992                         /*
993                          * no file size or range given, file size is equal to
994                          * total size divided by number of files. If the size
995                          * doesn't divide nicely with the min blocksize,
996                          * make the first files bigger.
997                          */
998                         f->io_size = fs;
999                         if (nr_fs_extra) {
1000                                 nr_fs_extra--;
1001                                 f->io_size += bs;
1002                         }
1003
1004                         /*
1005                          * We normally don't come here for regular files, but
1006                          * if the result is 0 for a regular file, set it to the
1007                          * real file size. This could be size of the existing
1008                          * one if it already exists, but otherwise will be set
1009                          * to 0. A new file won't be created because
1010                          * ->io_size + ->file_offset equals ->real_file_size.
1011                          */
1012                         if (!f->io_size) {
1013                                 if (f->file_offset > f->real_file_size)
1014                                         goto err_offset;
1015                                 f->io_size = f->real_file_size - f->file_offset;
1016                                 if (!f->io_size)
1017                                         log_info("fio: file %s may be ignored\n",
1018                                                 f->file_name);
1019                         }
1020                 } else if (f->real_file_size < o->file_size_low ||
1021                            f->real_file_size > o->file_size_high) {
1022                         if (f->file_offset > o->file_size_low)
1023                                 goto err_offset;
1024                         /*
1025                          * file size given. if it's fixed, use that. if it's a
1026                          * range, generate a random size in-between.
1027                          */
1028                         if (o->file_size_low == o->file_size_high)
1029                                 f->io_size = o->file_size_low - f->file_offset;
1030                         else {
1031                                 f->io_size = get_rand_file_size(td)
1032                                                 - f->file_offset;
1033                         }
1034                 } else
1035                         f->io_size = f->real_file_size - f->file_offset;
1036
1037                 if (f->io_size == -1ULL)
1038                         total_size = -1ULL;
1039                 else {
1040                         if (o->size_percent && o->size_percent != 100) {
1041                                 uint64_t file_size;
1042
1043                                 file_size = f->io_size + f->file_offset;
1044                                 f->io_size = (file_size *
1045                                               o->size_percent) / 100;
1046                                 if (f->io_size > (file_size - f->file_offset))
1047                                         f->io_size = file_size - f->file_offset;
1048
1049                                 f->io_size -= (f->io_size % td_min_bs(td));
1050                         }
1051                         total_size += f->io_size;
1052                 }
1053
1054                 if (f->filetype == FIO_TYPE_FILE &&
1055                     (f->io_size + f->file_offset) > f->real_file_size &&
1056                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
1057                         if (!o->create_on_open) {
1058                                 need_extend++;
1059                                 extend_size += (f->io_size + f->file_offset);
1060                                 fio_file_set_extend(f);
1061                         } else
1062                                 f->real_file_size = f->io_size + f->file_offset;
1063                 }
1064         }
1065
1066         if (td->o.block_error_hist) {
1067                 int len;
1068
1069                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1070                 f = td->files[0];
1071                 len = f->io_size / td->o.bs[DDIR_TRIM];
1072                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1073                         log_err("fio: cannot calculate block histogram with "
1074                                 "%d trim blocks, maximum %d\n",
1075                                 len, MAX_NR_BLOCK_INFOS);
1076                         td_verror(td, EINVAL, "block_error_hist");
1077                         goto err_out;
1078                 }
1079
1080                 td->ts.nr_block_infos = len;
1081                 for (i = 0; i < len; i++)
1082                         td->ts.block_infos[i] =
1083                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1084         } else
1085                 td->ts.nr_block_infos = 0;
1086
1087         if (!o->size || (total_size && o->size > total_size))
1088                 o->size = total_size;
1089
1090         if (o->size < td_min_bs(td)) {
1091                 log_err("fio: blocksize too large for data set\n");
1092                 goto err_out;
1093         }
1094
1095         /*
1096          * See if we need to extend some files, typically needed when our
1097          * target regular files don't exist yet, but our jobs require them
1098          * initially due to read I/Os.
1099          */
1100         if (need_extend) {
1101                 temp_stall_ts = 1;
1102                 if (output_format & FIO_OUTPUT_NORMAL) {
1103                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1104                                  o->name,
1105                                  need_extend > 1 ? "s" : "",
1106                                  need_extend,
1107                                  need_extend > 1 ? "s" : "",
1108                                  need_extend > 1 ? "total " : "",
1109                                  extend_size >> 20);
1110                 }
1111
1112                 for_each_file(td, f, i) {
1113                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1114
1115                         if (!fio_file_extend(f))
1116                                 continue;
1117
1118                         assert(f->filetype == FIO_TYPE_FILE);
1119                         fio_file_clear_extend(f);
1120                         if (!o->fill_device) {
1121                                 old_len = f->real_file_size;
1122                                 extend_len = f->io_size + f->file_offset -
1123                                                 old_len;
1124                         }
1125                         f->real_file_size = (f->io_size + f->file_offset);
1126                         err = extend_file(td, f);
1127                         if (err)
1128                                 break;
1129
1130                         err = __file_invalidate_cache(td, f, old_len,
1131                                                                 extend_len);
1132
1133                         /*
1134                          * Shut up static checker
1135                          */
1136                         if (f->fd != -1)
1137                                 close(f->fd);
1138
1139                         f->fd = -1;
1140                         if (err)
1141                                 break;
1142                 }
1143                 temp_stall_ts = 0;
1144         }
1145
1146         if (err)
1147                 goto err_out;
1148
1149         if (!o->zone_size)
1150                 o->zone_size = o->size;
1151
1152         /*
1153          * iolog already set the total io size, if we read back
1154          * stored entries.
1155          */
1156         if (!o->read_iolog_file) {
1157                 if (o->io_size)
1158                         td->total_io_size = o->io_size * o->loops;
1159                 else
1160                         td->total_io_size = o->size * o->loops;
1161         }
1162
1163 done:
1164         if (o->create_only)
1165                 td->done = 1;
1166
1167         td_restore_runstate(td, old_state);
1168         return 0;
1169 err_offset:
1170         log_err("%s: you need to specify valid offset=\n", o->name);
1171 err_out:
1172         td_restore_runstate(td, old_state);
1173         return 1;
1174 }
1175
1176 bool pre_read_files(struct thread_data *td)
1177 {
1178         struct fio_file *f;
1179         unsigned int i;
1180
1181         dprint(FD_FILE, "pre_read files\n");
1182
1183         for_each_file(td, f, i) {
1184                 if (!pre_read_file(td, f))
1185                         return false;
1186         }
1187
1188         return true;
1189 }
1190
1191 static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1192 {
1193         unsigned int range_size, seed;
1194         unsigned long nranges;
1195         uint64_t fsize;
1196
1197         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1198         fsize = min(f->real_file_size, f->io_size);
1199
1200         nranges = (fsize + range_size - 1) / range_size;
1201
1202         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1203         if (!td->o.rand_repeatable)
1204                 seed = td->rand_seeds[4];
1205
1206         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1207                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1208         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1209                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1210         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1211                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1212 }
1213
1214 static bool init_rand_distribution(struct thread_data *td)
1215 {
1216         struct fio_file *f;
1217         unsigned int i;
1218         int state;
1219
1220         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1221                 return false;
1222
1223         state = td_bump_runstate(td, TD_SETTING_UP);
1224
1225         for_each_file(td, f, i)
1226                 __init_rand_distribution(td, f);
1227
1228         td_restore_runstate(td, state);
1229         return true;
1230 }
1231
1232 /*
1233  * Check if the number of blocks exceeds the randomness capability of
1234  * the selected generator. Tausworthe is 32-bit, the others are fullly
1235  * 64-bit capable.
1236  */
1237 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1238                                  uint64_t blocks)
1239 {
1240         if (blocks <= FRAND32_MAX)
1241                 return 0;
1242         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1243                 return 0;
1244
1245         /*
1246          * If the user hasn't specified a random generator, switch
1247          * to tausworthe64 with informational warning. If the user did
1248          * specify one, just warn.
1249          */
1250         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1251                         f->file_name);
1252
1253         if (!fio_option_is_set(&td->o, random_generator)) {
1254                 log_info("fio: Switching to tausworthe64. Use the "
1255                          "random_generator= option to get rid of this "
1256                          "warning.\n");
1257                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1258                 return 0;
1259         }
1260
1261         /*
1262          * Just make this information to avoid breaking scripts.
1263          */
1264         log_info("fio: Use the random_generator= option to switch to lfsr or "
1265                          "tausworthe64.\n");
1266         return 0;
1267 }
1268
1269 bool init_random_map(struct thread_data *td)
1270 {
1271         unsigned long long blocks;
1272         struct fio_file *f;
1273         unsigned int i;
1274
1275         if (init_rand_distribution(td))
1276                 return true;
1277         if (!td_random(td))
1278                 return true;
1279
1280         for_each_file(td, f, i) {
1281                 uint64_t fsize = min(f->real_file_size, f->io_size);
1282
1283                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1284
1285                 if (check_rand_gen_limits(td, f, blocks))
1286                         return false;
1287
1288                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1289                         unsigned long seed;
1290
1291                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1292
1293                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1294                                 fio_file_set_lfsr(f);
1295                                 continue;
1296                         }
1297                 } else if (!td->o.norandommap) {
1298                         f->io_axmap = axmap_new(blocks);
1299                         if (f->io_axmap) {
1300                                 fio_file_set_axmap(f);
1301                                 continue;
1302                         }
1303                 } else if (td->o.norandommap)
1304                         continue;
1305
1306                 if (!td->o.softrandommap) {
1307                         log_err("fio: failed allocating random map. If running"
1308                                 " a large number of jobs, try the 'norandommap'"
1309                                 " option or set 'softrandommap'. Or give"
1310                                 " a larger --alloc-size to fio.\n");
1311                         return false;
1312                 }
1313
1314                 log_info("fio: file %s failed allocating random map. Running "
1315                          "job without.\n", f->file_name);
1316         }
1317
1318         return true;
1319 }
1320
1321 void close_files(struct thread_data *td)
1322 {
1323         struct fio_file *f;
1324         unsigned int i;
1325
1326         for_each_file(td, f, i) {
1327                 if (fio_file_open(f))
1328                         td_io_close_file(td, f);
1329         }
1330 }
1331
1332 void close_and_free_files(struct thread_data *td)
1333 {
1334         struct fio_file *f;
1335         unsigned int i;
1336         bool use_free = td_ioengine_flagged(td, FIO_NOFILEHASH);
1337
1338         dprint(FD_FILE, "close files\n");
1339
1340         for_each_file(td, f, i) {
1341                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1342                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1343                         td_io_unlink_file(td, f);
1344                 }
1345
1346                 if (fio_file_open(f))
1347                         td_io_close_file(td, f);
1348
1349                 remove_file_hash(f);
1350
1351                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1352                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1353                         td_io_unlink_file(td, f);
1354                 }
1355
1356                 if (use_free)
1357                         free(f->file_name);
1358                 else
1359                         sfree(f->file_name);
1360                 f->file_name = NULL;
1361                 if (fio_file_axmap(f)) {
1362                         axmap_free(f->io_axmap);
1363                         f->io_axmap = NULL;
1364                 }
1365                 if (use_free)
1366                         free(f);
1367                 else
1368                         sfree(f);
1369         }
1370
1371         td->o.filename = NULL;
1372         free(td->files);
1373         free(td->file_locks);
1374         td->files_index = 0;
1375         td->files = NULL;
1376         td->file_locks = NULL;
1377         td->o.file_lock_mode = FILE_LOCK_NONE;
1378         td->o.nr_files = 0;
1379 }
1380
1381 static void get_file_type(struct fio_file *f)
1382 {
1383         struct stat sb;
1384
1385         if (!strcmp(f->file_name, "-"))
1386                 f->filetype = FIO_TYPE_PIPE;
1387         else
1388                 f->filetype = FIO_TYPE_FILE;
1389
1390 #ifdef WIN32
1391         /* \\.\ is the device namespace in Windows, where every file is
1392          * a block device */
1393         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1394                 f->filetype = FIO_TYPE_BLOCK;
1395 #endif
1396
1397         if (!stat(f->file_name, &sb)) {
1398                 if (S_ISBLK(sb.st_mode))
1399                         f->filetype = FIO_TYPE_BLOCK;
1400                 else if (S_ISCHR(sb.st_mode))
1401                         f->filetype = FIO_TYPE_CHAR;
1402                 else if (S_ISFIFO(sb.st_mode))
1403                         f->filetype = FIO_TYPE_PIPE;
1404         }
1405 }
1406
1407 static bool __is_already_allocated(const char *fname, bool set)
1408 {
1409         struct flist_head *entry;
1410         bool ret;
1411
1412         ret = file_bloom_exists(fname, set);
1413         if (!ret)
1414                 return ret;
1415
1416         flist_for_each(entry, &filename_list) {
1417                 struct file_name *fn;
1418
1419                 fn = flist_entry(entry, struct file_name, list);
1420
1421                 if (!strcmp(fn->filename, fname))
1422                         return true;
1423         }
1424
1425         return false;
1426 }
1427
1428 static bool is_already_allocated(const char *fname)
1429 {
1430         bool ret;
1431
1432         fio_file_hash_lock();
1433         ret = __is_already_allocated(fname, false);
1434         fio_file_hash_unlock();
1435
1436         return ret;
1437 }
1438
1439 static void set_already_allocated(const char *fname)
1440 {
1441         struct file_name *fn;
1442
1443         fn = malloc(sizeof(struct file_name));
1444         fn->filename = strdup(fname);
1445
1446         fio_file_hash_lock();
1447         if (!__is_already_allocated(fname, true)) {
1448                 flist_add_tail(&fn->list, &filename_list);
1449                 fn = NULL;
1450         }
1451         fio_file_hash_unlock();
1452
1453         if (fn) {
1454                 free(fn->filename);
1455                 free(fn);
1456         }
1457 }
1458
1459 static void free_already_allocated(void)
1460 {
1461         struct flist_head *entry, *tmp;
1462         struct file_name *fn;
1463
1464         if (flist_empty(&filename_list))
1465                 return;
1466
1467         fio_file_hash_lock();
1468         flist_for_each_safe(entry, tmp, &filename_list) {
1469                 fn = flist_entry(entry, struct file_name, list);
1470                 free(fn->filename);
1471                 flist_del(&fn->list);
1472                 free(fn);
1473         }
1474
1475         fio_file_hash_unlock();
1476 }
1477
1478 static struct fio_file *alloc_new_file(struct thread_data *td)
1479 {
1480         struct fio_file *f;
1481
1482         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1483                 f = calloc(1, sizeof(*f));
1484         else
1485                 f = scalloc(1, sizeof(*f));
1486         if (!f) {
1487                 assert(0);
1488                 return NULL;
1489         }
1490
1491         f->fd = -1;
1492         f->shadow_fd = -1;
1493         fio_file_reset(td, f);
1494         return f;
1495 }
1496
1497 bool exists_and_not_regfile(const char *filename)
1498 {
1499         struct stat sb;
1500
1501         if (lstat(filename, &sb) == -1)
1502                 return false;
1503
1504 #ifndef WIN32 /* NOT Windows */
1505         if (S_ISREG(sb.st_mode))
1506                 return false;
1507 #else
1508         /* \\.\ is the device namespace in Windows, where every file
1509          * is a device node */
1510         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1511                 return false;
1512 #endif
1513
1514         return true;
1515 }
1516
1517 static bool create_work_dirs(struct thread_data *td, const char *fname)
1518 {
1519         char path[PATH_MAX];
1520         char *start, *end;
1521
1522         if (td->o.directory) {
1523                 snprintf(path, PATH_MAX, "%s%c%s", td->o.directory,
1524                          FIO_OS_PATH_SEPARATOR, fname);
1525                 start = strstr(path, fname);
1526         } else {
1527                 snprintf(path, PATH_MAX, "%s", fname);
1528                 start = path;
1529         }
1530
1531         end = start;
1532         while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
1533                 if (end == start)
1534                         break;
1535                 *end = '\0';
1536                 errno = 0;
1537 #ifdef CONFIG_HAVE_MKDIR_TWO
1538                 if (mkdir(path, 0600) && errno != EEXIST) {
1539 #else
1540                 if (mkdir(path) && errno != EEXIST) {
1541 #endif
1542                         log_err("fio: failed to create dir (%s): %d\n",
1543                                 start, errno);
1544                         return false;
1545                 }
1546                 *end = FIO_OS_PATH_SEPARATOR;
1547                 end++;
1548         }
1549         td->flags |= TD_F_DIRS_CREATED;
1550         return true;
1551 }
1552
1553 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1554 {
1555         int cur_files = td->files_index;
1556         char file_name[PATH_MAX];
1557         struct fio_file *f;
1558         int len = 0;
1559
1560         dprint(FD_FILE, "add file %s\n", fname);
1561
1562         if (td->o.directory)
1563                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1564                                         td->o.unique_filename);
1565
1566         sprintf(file_name + len, "%s", fname);
1567
1568         if (strchr(fname, FIO_OS_PATH_SEPARATOR) &&
1569             !(td->flags & TD_F_DIRS_CREATED) &&
1570             !create_work_dirs(td, fname))
1571                 return 1;
1572
1573         /* clean cloned siblings using existing files */
1574         if (numjob && is_already_allocated(file_name) &&
1575             !exists_and_not_regfile(fname))
1576                 return 0;
1577
1578         f = alloc_new_file(td);
1579
1580         if (td->files_size <= td->files_index) {
1581                 unsigned int new_size = td->o.nr_files + 1;
1582
1583                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1584
1585                 td->files = realloc(td->files, new_size * sizeof(f));
1586                 if (td->files == NULL) {
1587                         log_err("fio: realloc OOM\n");
1588                         assert(0);
1589                 }
1590                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1591                         td->file_locks = realloc(td->file_locks, new_size);
1592                         if (!td->file_locks) {
1593                                 log_err("fio: realloc OOM\n");
1594                                 assert(0);
1595                         }
1596                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1597                 }
1598                 td->files_size = new_size;
1599         }
1600         td->files[cur_files] = f;
1601         f->fileno = cur_files;
1602
1603         /*
1604          * init function, io engine may not be loaded yet
1605          */
1606         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1607                 f->real_file_size = -1ULL;
1608
1609         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1610                 f->file_name = strdup(file_name);
1611         else
1612                 f->file_name = smalloc_strdup(file_name);
1613         if (!f->file_name)
1614                 assert(0);
1615
1616         get_file_type(f);
1617
1618         switch (td->o.file_lock_mode) {
1619         case FILE_LOCK_NONE:
1620                 break;
1621         case FILE_LOCK_READWRITE:
1622                 f->rwlock = fio_rwlock_init();
1623                 break;
1624         case FILE_LOCK_EXCLUSIVE:
1625                 f->lock = fio_sem_init(FIO_SEM_UNLOCKED);
1626                 break;
1627         default:
1628                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1629                 assert(0);
1630         }
1631
1632         td->files_index++;
1633
1634         if (td->o.numjobs > 1)
1635                 set_already_allocated(file_name);
1636
1637         if (inc)
1638                 td->o.nr_files++;
1639
1640         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1641                                                         cur_files);
1642
1643         return cur_files;
1644 }
1645
1646 int add_file_exclusive(struct thread_data *td, const char *fname)
1647 {
1648         struct fio_file *f;
1649         unsigned int i;
1650
1651         for_each_file(td, f, i) {
1652                 if (!strcmp(f->file_name, fname))
1653                         return i;
1654         }
1655
1656         return add_file(td, fname, 0, 1);
1657 }
1658
1659 void get_file(struct fio_file *f)
1660 {
1661         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1662         assert(fio_file_open(f));
1663         f->references++;
1664 }
1665
1666 int put_file(struct thread_data *td, struct fio_file *f)
1667 {
1668         int f_ret = 0, ret = 0;
1669
1670         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1671
1672         if (!fio_file_open(f)) {
1673                 assert(f->fd == -1);
1674                 return 0;
1675         }
1676
1677         assert(f->references);
1678         if (--f->references)
1679                 return 0;
1680
1681         if (should_fsync(td) && td->o.fsync_on_close) {
1682                 f_ret = fsync(f->fd);
1683                 if (f_ret < 0)
1684                         f_ret = errno;
1685         }
1686
1687         if (td->io_ops->close_file)
1688                 ret = td->io_ops->close_file(td, f);
1689
1690         if (!ret)
1691                 ret = f_ret;
1692
1693         td->nr_open_files--;
1694         fio_file_clear_open(f);
1695         assert(f->fd == -1);
1696         return ret;
1697 }
1698
1699 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1700 {
1701         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1702                 return;
1703
1704         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1705                 if (ddir == DDIR_READ)
1706                         fio_rwlock_read(f->rwlock);
1707                 else
1708                         fio_rwlock_write(f->rwlock);
1709         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1710                 fio_sem_down(f->lock);
1711
1712         td->file_locks[f->fileno] = td->o.file_lock_mode;
1713 }
1714
1715 void unlock_file(struct thread_data *td, struct fio_file *f)
1716 {
1717         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1718                 return;
1719
1720         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1721                 fio_rwlock_unlock(f->rwlock);
1722         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1723                 fio_sem_up(f->lock);
1724
1725         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1726 }
1727
1728 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1729 {
1730         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1731                 return;
1732         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1733                 unlock_file(td, f);
1734 }
1735
1736 static bool recurse_dir(struct thread_data *td, const char *dirname)
1737 {
1738         struct dirent *dir;
1739         bool ret = false;
1740         DIR *D;
1741
1742         D = opendir(dirname);
1743         if (!D) {
1744                 char buf[FIO_VERROR_SIZE];
1745
1746                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1747                 td_verror(td, errno, buf);
1748                 return true;
1749         }
1750
1751         while ((dir = readdir(D)) != NULL) {
1752                 char full_path[PATH_MAX];
1753                 struct stat sb;
1754
1755                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1756                         continue;
1757
1758                 sprintf(full_path, "%s%c%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1759
1760                 if (lstat(full_path, &sb) == -1) {
1761                         if (errno != ENOENT) {
1762                                 td_verror(td, errno, "stat");
1763                                 ret = true;
1764                                 break;
1765                         }
1766                 }
1767
1768                 if (S_ISREG(sb.st_mode)) {
1769                         add_file(td, full_path, 0, 1);
1770                         continue;
1771                 }
1772                 if (!S_ISDIR(sb.st_mode))
1773                         continue;
1774
1775                 ret = recurse_dir(td, full_path);
1776                 if (ret)
1777                         break;
1778         }
1779
1780         closedir(D);
1781         return ret;
1782 }
1783
1784 int add_dir_files(struct thread_data *td, const char *path)
1785 {
1786         int ret = recurse_dir(td, path);
1787
1788         if (!ret)
1789                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1790
1791         return ret;
1792 }
1793
1794 void dup_files(struct thread_data *td, struct thread_data *org)
1795 {
1796         struct fio_file *f;
1797         unsigned int i;
1798
1799         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1800
1801         if (!org->files)
1802                 return;
1803
1804         td->files = malloc(org->files_index * sizeof(f));
1805
1806         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1807                 td->file_locks = malloc(org->files_index);
1808
1809         for_each_file(org, f, i) {
1810                 struct fio_file *__f;
1811
1812                 __f = alloc_new_file(td);
1813
1814                 if (f->file_name) {
1815                         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1816                                 __f->file_name = strdup(f->file_name);
1817                         else
1818                                 __f->file_name = smalloc_strdup(f->file_name);
1819                         if (!__f->file_name)
1820                                 assert(0);
1821
1822                         __f->filetype = f->filetype;
1823                 }
1824
1825                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1826                         __f->lock = f->lock;
1827                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1828                         __f->rwlock = f->rwlock;
1829
1830                 td->files[i] = __f;
1831         }
1832 }
1833
1834 /*
1835  * Returns the index that matches the filename, or -1 if not there
1836  */
1837 int get_fileno(struct thread_data *td, const char *fname)
1838 {
1839         struct fio_file *f;
1840         unsigned int i;
1841
1842         for_each_file(td, f, i)
1843                 if (!strcmp(f->file_name, fname))
1844                         return i;
1845
1846         return -1;
1847 }
1848
1849 /*
1850  * For log usage, where we add/open/close files automatically
1851  */
1852 void free_release_files(struct thread_data *td)
1853 {
1854         close_files(td);
1855         td->o.nr_files = 0;
1856         td->o.open_files = 0;
1857         td->files_index = 0;
1858 }
1859
1860 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1861 {
1862         int i;
1863
1864         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1865                 f->last_pos[i] = f->file_offset;
1866                 f->last_start[i] = -1ULL;
1867         }
1868
1869         if (fio_file_axmap(f))
1870                 axmap_reset(f->io_axmap);
1871         else if (fio_file_lfsr(f))
1872                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1873 }
1874
1875 bool fio_files_done(struct thread_data *td)
1876 {
1877         struct fio_file *f;
1878         unsigned int i;
1879
1880         for_each_file(td, f, i)
1881                 if (!fio_file_done(f))
1882                         return false;
1883
1884         return true;
1885 }
1886
1887 /* free memory used in initialization phase only */
1888 void filesetup_mem_free(void)
1889 {
1890         free_already_allocated();
1891 }
1892
1893 /*
1894  * This function is for platforms which support direct I/O but not O_DIRECT.
1895  */
1896 int fio_set_directio(struct thread_data *td, struct fio_file *f)
1897 {
1898 #ifdef FIO_OS_DIRECTIO
1899         int ret = fio_set_odirect(f);
1900
1901         if (ret) {
1902                 td_verror(td, ret, "fio_set_directio");
1903 #if defined(__sun__)
1904                 if (ret == ENOTTY) { /* ENOTTY suggests RAW device or ZFS */
1905                         log_err("fio: doing directIO to RAW devices or ZFS not supported\n");
1906                 } else {
1907                         log_err("fio: the file system does not seem to support direct IO\n");
1908                 }
1909 #else
1910                 log_err("fio: the file system does not seem to support direct IO\n");
1911 #endif
1912                 return -1;
1913         }
1914
1915         return 0;
1916 #else
1917         log_err("fio: direct IO is not supported on this host operating system\n");
1918         return -1;
1919 #endif
1920 }