75694bd81825082516d9f1601de08a650ebe9aa1
[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
9 #include "fio.h"
10 #include "smalloc.h"
11 #include "filehash.h"
12 #include "options.h"
13 #include "os/os.h"
14 #include "hash.h"
15 #include "lib/axmap.h"
16 #include "rwlock.h"
17
18 #ifdef CONFIG_LINUX_FALLOCATE
19 #include <linux/falloc.h>
20 #endif
21
22 static FLIST_HEAD(filename_list);
23
24 /*
25  * List entry for filename_list
26  */
27 struct file_name {
28         struct flist_head list;
29         char *filename;
30 };
31
32 static inline void clear_error(struct thread_data *td)
33 {
34         td->error = 0;
35         td->verror[0] = '\0';
36 }
37
38 static int native_fallocate(struct thread_data *td, struct fio_file *f)
39 {
40         bool success;
41
42         success = fio_fallocate(f, 0, f->real_file_size);
43         dprint(FD_FILE, "native fallocate of file %s size %llu was "
44                         "%ssuccessful\n", f->file_name,
45                         (unsigned long long) f->real_file_size,
46                         !success ? "un": "");
47
48         if (success)
49                 return false;
50
51         if (errno == ENOSYS)
52                 dprint(FD_FILE, "native fallocate is not implemented\n");
53
54         return true;
55 }
56
57 static void fallocate_file(struct thread_data *td, struct fio_file *f)
58 {
59         if (td->o.fill_device)
60                 return;
61
62         switch (td->o.fallocate_mode) {
63         case FIO_FALLOCATE_NATIVE:
64                 native_fallocate(td, f);
65                 break;
66         case FIO_FALLOCATE_NONE:
67                 break;
68 #ifdef CONFIG_POSIX_FALLOCATE
69         case FIO_FALLOCATE_POSIX: {
70                 int r;
71
72                 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
73                                  f->file_name,
74                                  (unsigned long long) f->real_file_size);
75
76                 r = posix_fallocate(f->fd, 0, f->real_file_size);
77                 if (r > 0)
78                         log_err("fio: posix_fallocate fails: %s\n", strerror(r));
79                 break;
80                 }
81 #endif /* CONFIG_POSIX_FALLOCATE */
82 #ifdef CONFIG_LINUX_FALLOCATE
83         case FIO_FALLOCATE_KEEP_SIZE: {
84                 int r;
85
86                 dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
87                                 "file %s size %llu\n", f->file_name,
88                                 (unsigned long long) f->real_file_size);
89
90                 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
91                 if (r != 0)
92                         td_verror(td, errno, "fallocate");
93
94                 break;
95                 }
96 #endif /* CONFIG_LINUX_FALLOCATE */
97         default:
98                 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
99                 assert(0);
100         }
101 }
102
103 /*
104  * Leaves f->fd open on success, caller must close
105  */
106 static int extend_file(struct thread_data *td, struct fio_file *f)
107 {
108         int new_layout = 0, unlink_file = 0, flags;
109         unsigned long long left;
110         unsigned int bs;
111         char *b = NULL;
112
113         if (read_only) {
114                 log_err("fio: refusing extend of file due to read-only\n");
115                 return 0;
116         }
117
118         /*
119          * check if we need to lay the file out complete again. fio
120          * does that for operations involving reads, or for writes
121          * where overwrite is set
122          */
123         if (td_read(td) ||
124            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
125             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
126                 new_layout = 1;
127         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
128                 unlink_file = 1;
129
130         if (unlink_file || new_layout) {
131                 int ret;
132
133                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
134
135                 ret = td_io_unlink_file(td, f);
136                 if (ret != 0 && ret != ENOENT) {
137                         td_verror(td, errno, "unlink");
138                         return 1;
139                 }
140         }
141
142         flags = O_WRONLY;
143         if (td->o.allow_create)
144                 flags |= O_CREAT;
145         if (new_layout)
146                 flags |= O_TRUNC;
147
148 #ifdef WIN32
149         flags |= _O_BINARY;
150 #endif
151
152         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
153         f->fd = open(f->file_name, flags, 0644);
154         if (f->fd < 0) {
155                 int err = errno;
156
157                 if (err == ENOENT && !td->o.allow_create)
158                         log_err("fio: file creation disallowed by "
159                                         "allow_file_create=0\n");
160                 else
161                         td_verror(td, err, "open");
162                 return 1;
163         }
164
165         fallocate_file(td, f);
166
167         /*
168          * If our jobs don't require regular files initially, we're done.
169          */
170         if (!new_layout)
171                 goto done;
172
173         /*
174          * The size will be -1ULL when fill_device is used, so don't truncate
175          * or fallocate this file, just write it
176          */
177         if (!td->o.fill_device) {
178                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
179                                         (unsigned long long) f->real_file_size);
180                 if (ftruncate(f->fd, f->real_file_size) == -1) {
181                         if (errno != EFBIG) {
182                                 td_verror(td, errno, "ftruncate");
183                                 goto err;
184                         }
185                 }
186         }
187
188         left = f->real_file_size;
189         bs = td->o.max_bs[DDIR_WRITE];
190         if (bs > left)
191                 bs = left;
192
193         b = malloc(bs);
194         if (!b) {
195                 td_verror(td, errno, "malloc");
196                 goto err;
197         }
198
199         while (left && !td->terminate) {
200                 ssize_t r;
201
202                 if (bs > left)
203                         bs = left;
204
205                 fill_io_buffer(td, b, bs, bs);
206
207                 r = write(f->fd, b, bs);
208
209                 if (r > 0) {
210                         left -= r;
211                         continue;
212                 } else {
213                         if (r < 0) {
214                                 int __e = errno;
215
216                                 if (__e == ENOSPC) {
217                                         if (td->o.fill_device)
218                                                 break;
219                                         log_info("fio: ENOSPC on laying out "
220                                                  "file, stopping\n");
221                                         break;
222                                 }
223                                 td_verror(td, errno, "write");
224                         } else
225                                 td_verror(td, EIO, "write");
226
227                         break;
228                 }
229         }
230
231         if (td->terminate) {
232                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
233                 td_io_unlink_file(td, f);
234         } else if (td->o.create_fsync) {
235                 if (fsync(f->fd) < 0) {
236                         td_verror(td, errno, "fsync");
237                         goto err;
238                 }
239         }
240         if (td->o.fill_device && !td_write(td)) {
241                 fio_file_clear_size_known(f);
242                 if (td_io_get_file_size(td, f))
243                         goto err;
244                 if (f->io_size > f->real_file_size)
245                         f->io_size = f->real_file_size;
246         }
247
248         free(b);
249 done:
250         return 0;
251 err:
252         close(f->fd);
253         f->fd = -1;
254         if (b)
255                 free(b);
256         return 1;
257 }
258
259 static bool pre_read_file(struct thread_data *td, struct fio_file *f)
260 {
261         int r, did_open = 0, old_runstate;
262         unsigned long long left;
263         unsigned int bs;
264         bool ret = true;
265         char *b;
266
267         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
268             td_ioengine_flagged(td, FIO_NOIO))
269                 return true;
270
271         if (f->filetype == FIO_TYPE_CHAR)
272                 return true;
273
274         if (!fio_file_open(f)) {
275                 if (td->io_ops->open_file(td, f)) {
276                         log_err("fio: cannot pre-read, failed to open file\n");
277                         return false;
278                 }
279                 did_open = 1;
280         }
281
282         old_runstate = td_bump_runstate(td, TD_PRE_READING);
283
284         left = f->io_size;
285         bs = td->o.max_bs[DDIR_READ];
286         if (bs > left)
287                 bs = left;
288
289         b = malloc(bs);
290         if (!b) {
291                 td_verror(td, errno, "malloc");
292                 ret = false;
293                 goto error;
294         }
295         memset(b, 0, bs);
296
297         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
298                 td_verror(td, errno, "lseek");
299                 log_err("fio: failed to lseek pre-read file\n");
300                 ret = false;
301                 goto error;
302         }
303
304         while (left && !td->terminate) {
305                 if (bs > left)
306                         bs = left;
307
308                 r = read(f->fd, b, bs);
309
310                 if (r == (int) bs) {
311                         left -= bs;
312                         continue;
313                 } else {
314                         td_verror(td, EIO, "pre_read");
315                         break;
316                 }
317         }
318
319 error:
320         td_restore_runstate(td, old_runstate);
321
322         if (did_open)
323                 td->io_ops->close_file(td, f);
324
325         free(b);
326         return ret;
327 }
328
329 unsigned long long get_rand_file_size(struct thread_data *td)
330 {
331         unsigned long long ret, sized;
332         uint64_t frand_max;
333         unsigned long r;
334
335         frand_max = rand_max(&td->file_size_state);
336         r = __rand(&td->file_size_state);
337         sized = td->o.file_size_high - td->o.file_size_low;
338         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
339         ret += td->o.file_size_low;
340         ret -= (ret % td->o.rw_min_bs);
341         return ret;
342 }
343
344 static int file_size(struct thread_data *td, struct fio_file *f)
345 {
346         struct stat st;
347
348         if (stat(f->file_name, &st) == -1) {
349                 td_verror(td, errno, "fstat");
350                 return 1;
351         }
352
353         f->real_file_size = st.st_size;
354         return 0;
355 }
356
357 static int bdev_size(struct thread_data *td, struct fio_file *f)
358 {
359         unsigned long long bytes = 0;
360         int r;
361
362         if (td->io_ops->open_file(td, f)) {
363                 log_err("fio: failed opening blockdev %s for size check\n",
364                         f->file_name);
365                 return 1;
366         }
367
368         r = blockdev_size(f, &bytes);
369         if (r) {
370                 td_verror(td, r, "blockdev_size");
371                 goto err;
372         }
373
374         if (!bytes) {
375                 log_err("%s: zero sized block device?\n", f->file_name);
376                 goto err;
377         }
378
379         f->real_file_size = bytes;
380         td->io_ops->close_file(td, f);
381         return 0;
382 err:
383         td->io_ops->close_file(td, f);
384         return 1;
385 }
386
387 static int char_size(struct thread_data *td, struct fio_file *f)
388 {
389 #ifdef FIO_HAVE_CHARDEV_SIZE
390         unsigned long long bytes = 0;
391         int r;
392
393         if (td->io_ops->open_file(td, f)) {
394                 log_err("fio: failed opening chardev %s for size check\n",
395                         f->file_name);
396                 return 1;
397         }
398
399         r = chardev_size(f, &bytes);
400         if (r) {
401                 td_verror(td, r, "chardev_size");
402                 goto err;
403         }
404
405         if (!bytes) {
406                 log_err("%s: zero sized char device?\n", f->file_name);
407                 goto err;
408         }
409
410         f->real_file_size = bytes;
411         td->io_ops->close_file(td, f);
412         return 0;
413 err:
414         td->io_ops->close_file(td, f);
415         return 1;
416 #else
417         f->real_file_size = -1ULL;
418         return 0;
419 #endif
420 }
421
422 static int get_file_size(struct thread_data *td, struct fio_file *f)
423 {
424         int ret = 0;
425
426         if (fio_file_size_known(f))
427                 return 0;
428
429         if (f->filetype == FIO_TYPE_FILE)
430                 ret = file_size(td, f);
431         else if (f->filetype == FIO_TYPE_BLOCK)
432                 ret = bdev_size(td, f);
433         else if (f->filetype == FIO_TYPE_CHAR)
434                 ret = char_size(td, f);
435         else {
436                 f->real_file_size = -1;
437                 log_info("%s: failed to get file size of %s\n", td->o.name,
438                                         f->file_name);
439                 return 1; /* avoid offset extends end error message */
440         }
441
442         /*
443          * Leave ->real_file_size with 0 since it could be expectation
444          * of initial setup for regular files.
445          */
446         if (ret)
447                 return ret;
448
449         /*
450          * ->file_offset normally hasn't been initialized yet, so this
451          * is basically always false unless ->real_file_size is -1, but
452          * if ->real_file_size is -1 this message doesn't make sense.
453          * As a result, this message is basically useless.
454          */
455         if (f->file_offset > f->real_file_size) {
456                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
457                                         (unsigned long long) f->file_offset,
458                                         (unsigned long long) f->real_file_size);
459                 return 1;
460         }
461
462         fio_file_set_size_known(f);
463         return 0;
464 }
465
466 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
467                                    unsigned long long off,
468                                    unsigned long long len)
469 {
470         int errval = 0, ret = 0;
471
472 #ifdef CONFIG_ESX
473         return 0;
474 #endif
475
476         if (len == -1ULL)
477                 len = f->io_size;
478         if (off == -1ULL)
479                 off = f->file_offset;
480
481         if (len == -1ULL || off == -1ULL)
482                 return 0;
483
484         if (td->io_ops->invalidate) {
485                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
486                         f->file_name);
487                 ret = td->io_ops->invalidate(td, f);
488                 if (ret < 0)
489                         errval = -ret;
490         } else if (td_ioengine_flagged(td, FIO_DISKLESSIO)) {
491                 dprint(FD_IO, "invalidate not supported by ioengine %s\n",
492                        td->io_ops->name);
493         } else if (f->filetype == FIO_TYPE_FILE) {
494                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
495                         f->file_name, off, len);
496                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
497                 if (ret)
498                         errval = ret;
499         } else if (f->filetype == FIO_TYPE_BLOCK) {
500                 int retry_count = 0;
501
502                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
503                 ret = blockdev_invalidate_cache(f);
504                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
505                         /*
506                          * Linux multipath devices reject ioctl while
507                          * the maps are being updated. That window can
508                          * last tens of milliseconds; we'll try up to
509                          * a quarter of a second.
510                          */
511                         usleep(10000);
512                         ret = blockdev_invalidate_cache(f);
513                 }
514                 if (ret < 0 && errno == EACCES && geteuid()) {
515                         if (!fio_did_warn(FIO_WARN_ROOT_FLUSH)) {
516                                 log_err("fio: only root may flush block "
517                                         "devices. Cache flush bypassed!\n");
518                         }
519                 }
520                 if (ret < 0)
521                         errval = errno;
522         } else if (f->filetype == FIO_TYPE_CHAR ||
523                    f->filetype == FIO_TYPE_PIPE) {
524                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
525         }
526
527         /*
528          * Cache flushing isn't a fatal condition, and we know it will
529          * happen on some platforms where we don't have the proper
530          * function to flush eg block device caches. So just warn and
531          * continue on our way.
532          */
533         if (errval)
534                 log_info("fio: cache invalidation of %s failed: %s\n",
535                          f->file_name, strerror(errval));
536
537         return 0;
538
539 }
540
541 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
542 {
543         if (!fio_file_open(f))
544                 return 0;
545
546         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
547 }
548
549 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
550 {
551         int ret = 0;
552
553         dprint(FD_FILE, "fd close %s\n", f->file_name);
554
555         remove_file_hash(f);
556
557         if (close(f->fd) < 0)
558                 ret = errno;
559
560         f->fd = -1;
561
562         if (f->shadow_fd != -1) {
563                 close(f->shadow_fd);
564                 f->shadow_fd = -1;
565         }
566
567         f->engine_pos = 0;
568         return ret;
569 }
570
571 int file_lookup_open(struct fio_file *f, int flags)
572 {
573         struct fio_file *__f;
574         int from_hash;
575
576         __f = lookup_file_hash(f->file_name);
577         if (__f) {
578                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
579                 f->lock = __f->lock;
580                 from_hash = 1;
581         } else {
582                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
583                 from_hash = 0;
584         }
585
586 #ifdef WIN32
587         flags |= _O_BINARY;
588 #endif
589
590         f->fd = open(f->file_name, flags, 0600);
591         return from_hash;
592 }
593
594 static int file_close_shadow_fds(struct thread_data *td)
595 {
596         struct fio_file *f;
597         int num_closed = 0;
598         unsigned int i;
599
600         for_each_file(td, f, i) {
601                 if (f->shadow_fd == -1)
602                         continue;
603
604                 close(f->shadow_fd);
605                 f->shadow_fd = -1;
606                 num_closed++;
607         }
608
609         return num_closed;
610 }
611
612 int generic_open_file(struct thread_data *td, struct fio_file *f)
613 {
614         int is_std = 0;
615         int flags = 0;
616         int from_hash = 0;
617
618         dprint(FD_FILE, "fd open %s\n", f->file_name);
619
620         if (!strcmp(f->file_name, "-")) {
621                 if (td_rw(td)) {
622                         log_err("fio: can't read/write to stdin/out\n");
623                         return 1;
624                 }
625                 is_std = 1;
626
627                 /*
628                  * move output logging to stderr, if we are writing to stdout
629                  */
630                 if (td_write(td))
631                         f_out = stderr;
632         }
633
634         if (td_trim(td))
635                 goto skip_flags;
636         if (td->o.odirect)
637                 flags |= OS_O_DIRECT;
638         if (td->o.oatomic) {
639                 if (!FIO_O_ATOMIC) {
640                         td_verror(td, EINVAL, "OS does not support atomic IO");
641                         return 1;
642                 }
643                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
644         }
645         if (td->o.sync_io)
646                 flags |= O_SYNC;
647         if (td->o.create_on_open && td->o.allow_create)
648                 flags |= O_CREAT;
649 skip_flags:
650         if (f->filetype != FIO_TYPE_FILE)
651                 flags |= FIO_O_NOATIME;
652
653 open_again:
654         if (td_write(td)) {
655                 if (!read_only)
656                         flags |= O_RDWR;
657
658                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
659                         flags |= O_CREAT;
660
661                 if (is_std)
662                         f->fd = dup(STDOUT_FILENO);
663                 else
664                         from_hash = file_lookup_open(f, flags);
665         } else if (td_read(td)) {
666                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
667                         flags |= O_RDWR;
668                 else
669                         flags |= O_RDONLY;
670
671                 if (is_std)
672                         f->fd = dup(STDIN_FILENO);
673                 else
674                         from_hash = file_lookup_open(f, flags);
675         } else if (td_trim(td)) {
676                 assert(!td_rw(td)); /* should have matched above */
677                 flags |= O_RDWR;
678                 from_hash = file_lookup_open(f, flags);
679         }
680
681         if (f->fd == -1) {
682                 char buf[FIO_VERROR_SIZE];
683                 int __e = errno;
684
685                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
686                         flags &= ~FIO_O_NOATIME;
687                         goto open_again;
688                 }
689                 if (__e == EMFILE && file_close_shadow_fds(td))
690                         goto open_again;
691
692                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
693
694                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
695                         log_err("fio: looks like your file system does not " \
696                                 "support direct=1/buffered=0\n");
697                 }
698
699                 td_verror(td, __e, buf);
700                 return 1;
701         }
702
703         if (!from_hash && f->fd != -1) {
704                 if (add_file_hash(f)) {
705                         int fio_unused ret;
706
707                         /*
708                          * Stash away descriptor for later close. This is to
709                          * work-around a "feature" on Linux, where a close of
710                          * an fd that has been opened for write will trigger
711                          * udev to call blkid to check partitions, fs id, etc.
712                          * That pollutes the device cache, which can slow down
713                          * unbuffered accesses.
714                          */
715                         if (f->shadow_fd == -1)
716                                 f->shadow_fd = f->fd;
717                         else {
718                                 /*
719                                  * OK to ignore, we haven't done anything
720                                  * with it
721                                  */
722                                 ret = generic_close_file(td, f);
723                         }
724                         goto open_again;
725                 }
726         }
727
728         return 0;
729 }
730
731 /*
732  * This function i.e. get_file_size() is the default .get_file_size
733  * implementation of majority of I/O engines.
734  */
735 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
736 {
737         return get_file_size(td, f);
738 }
739
740 /*
741  * open/close all files, so that ->real_file_size gets set
742  */
743 static int get_file_sizes(struct thread_data *td)
744 {
745         struct fio_file *f;
746         unsigned int i;
747         int err = 0;
748
749         for_each_file(td, f, i) {
750                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
751                                                                 f->file_name);
752
753                 if (td_io_get_file_size(td, f)) {
754                         if (td->error != ENOENT) {
755                                 log_err("%s\n", td->verror);
756                                 err = 1;
757                                 break;
758                         }
759                         clear_error(td);
760                 }
761
762                 /*
763                  * There are corner cases where we end up with -1 for
764                  * ->real_file_size due to unsupported file type, etc.
765                  * We then just set to size option value divided by number
766                  * of files, similar to the way file ->io_size is set.
767                  * stat(2) failure doesn't set ->real_file_size to -1.
768                  */
769                 if (f->real_file_size == -1ULL && td->o.size)
770                         f->real_file_size = td->o.size / td->o.nr_files;
771         }
772
773         return err;
774 }
775
776 struct fio_mount {
777         struct flist_head list;
778         const char *base;
779         char __base[256];
780         unsigned int key;
781 };
782
783 /*
784  * Get free number of bytes for each file on each unique mount.
785  */
786 static unsigned long long get_fs_free_counts(struct thread_data *td)
787 {
788         struct flist_head *n, *tmp;
789         unsigned long long ret = 0;
790         struct fio_mount *fm;
791         FLIST_HEAD(list);
792         struct fio_file *f;
793         unsigned int i;
794
795         for_each_file(td, f, i) {
796                 struct stat sb;
797                 char buf[256];
798
799                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
800                         if (f->real_file_size != -1ULL)
801                                 ret += f->real_file_size;
802                         continue;
803                 } else if (f->filetype != FIO_TYPE_FILE)
804                         continue;
805
806                 buf[255] = '\0';
807                 strncpy(buf, f->file_name, 255);
808
809                 if (stat(buf, &sb) < 0) {
810                         if (errno != ENOENT)
811                                 break;
812                         strcpy(buf, ".");
813                         if (stat(buf, &sb) < 0)
814                                 break;
815                 }
816
817                 fm = NULL;
818                 flist_for_each(n, &list) {
819                         fm = flist_entry(n, struct fio_mount, list);
820                         if (fm->key == sb.st_dev)
821                                 break;
822
823                         fm = NULL;
824                 }
825
826                 if (fm)
827                         continue;
828
829                 fm = calloc(1, sizeof(*fm));
830                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
831                 fm->base = basename(fm->__base);
832                 fm->key = sb.st_dev;
833                 flist_add(&fm->list, &list);
834         }
835
836         flist_for_each_safe(n, tmp, &list) {
837                 unsigned long long sz;
838
839                 fm = flist_entry(n, struct fio_mount, list);
840                 flist_del(&fm->list);
841
842                 sz = get_fs_free_size(fm->base);
843                 if (sz && sz != -1ULL)
844                         ret += sz;
845
846                 free(fm);
847         }
848
849         return ret;
850 }
851
852 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
853 {
854         struct thread_options *o = &td->o;
855         unsigned long long align_bs;
856         unsigned long long offset;
857
858         if (o->file_append && f->filetype == FIO_TYPE_FILE)
859                 return f->real_file_size;
860
861         if (o->start_offset_percent > 0) {
862                 /*
863                  * if offset_align is provided, set initial offset
864                  */
865                 if (fio_option_is_set(o, start_offset_align)) {
866                         align_bs = o->start_offset_align;
867                 } else {
868                         /* else take the minimum block size */
869                         align_bs = td_min_bs(td);
870                 }
871
872                 /* calculate the raw offset */
873                 offset = (f->real_file_size * o->start_offset_percent / 100) +
874                         (td->subjob_number * o->offset_increment);
875
876                 /*
877                  * block align the offset at the next available boundary at
878                  * ceiling(offset / align_bs) * align_bs
879                  */
880                 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
881
882         } else {
883                 /* start_offset_percent not set */
884                 offset = o->start_offset +
885                                 td->subjob_number * o->offset_increment;
886         }
887
888         return offset;
889 }
890
891 /*
892  * Open the files and setup files sizes, creating files if necessary.
893  */
894 int setup_files(struct thread_data *td)
895 {
896         unsigned long long total_size, extend_size;
897         struct thread_options *o = &td->o;
898         struct fio_file *f;
899         unsigned int i, nr_fs_extra = 0;
900         int err = 0, need_extend;
901         int old_state;
902         const unsigned int bs = td_min_bs(td);
903         uint64_t fs = 0;
904
905         dprint(FD_FILE, "setup files\n");
906
907         old_state = td_bump_runstate(td, TD_SETTING_UP);
908
909         if (o->read_iolog_file)
910                 goto done;
911
912         /*
913          * Find out physical size of files or devices for this thread,
914          * before we determine I/O size and range of our targets.
915          * If ioengine defines a setup() method, it's responsible for
916          * opening the files and setting f->real_file_size to indicate
917          * the valid range for that file.
918          */
919         if (td->io_ops->setup)
920                 err = td->io_ops->setup(td);
921         else
922                 err = get_file_sizes(td);
923
924         if (err)
925                 goto err_out;
926
927         /*
928          * check sizes. if the files/devices do not exist and the size
929          * isn't passed to fio, abort.
930          */
931         total_size = 0;
932         for_each_file(td, f, i) {
933                 f->fileno = i;
934                 if (f->real_file_size == -1ULL)
935                         total_size = -1ULL;
936                 else
937                         total_size += f->real_file_size;
938         }
939
940         if (o->fill_device)
941                 td->fill_device_size = get_fs_free_counts(td);
942
943         /*
944          * device/file sizes are zero and no size given, punt
945          */
946         if ((!total_size || total_size == -1ULL) && !o->size &&
947             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
948             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
949                 log_err("%s: you need to specify size=\n", o->name);
950                 td_verror(td, EINVAL, "total_file_size");
951                 goto err_out;
952         }
953
954         /*
955          * Calculate per-file size and potential extra size for the
956          * first files, if needed (i.e. if we don't have a fixed size).
957          */
958         if (!o->file_size_low && o->nr_files) {
959                 uint64_t all_fs;
960
961                 fs = o->size / o->nr_files;
962                 all_fs = fs * o->nr_files;
963
964                 if (all_fs < o->size)
965                         nr_fs_extra = (o->size - all_fs) / bs;
966         }
967
968         /*
969          * now file sizes are known, so we can set ->io_size. if size= is
970          * not given, ->io_size is just equal to ->real_file_size. if size
971          * is given, ->io_size is size / nr_files.
972          */
973         extend_size = total_size = 0;
974         need_extend = 0;
975         for_each_file(td, f, i) {
976                 f->file_offset = get_start_offset(td, f);
977
978                 /*
979                  * Update ->io_size depending on options specified.
980                  * ->file_size_low being 0 means filesize option isn't set.
981                  * Non zero ->file_size_low equals ->file_size_high means
982                  * filesize option is set in a fixed size format.
983                  * Non zero ->file_size_low not equals ->file_size_high means
984                  * filesize option is set in a range format.
985                  */
986                 if (!o->file_size_low) {
987                         /*
988                          * no file size or range given, file size is equal to
989                          * total size divided by number of files. If the size
990                          * doesn't divide nicely with the min blocksize,
991                          * make the first files bigger.
992                          */
993                         f->io_size = fs;
994                         if (nr_fs_extra) {
995                                 nr_fs_extra--;
996                                 f->io_size += bs;
997                         }
998
999                         /*
1000                          * We normally don't come here for regular files, but
1001                          * if the result is 0 for a regular file, set it to the
1002                          * real file size. This could be size of the existing
1003                          * one if it already exists, but otherwise will be set
1004                          * to 0. A new file won't be created because
1005                          * ->io_size + ->file_offset equals ->real_file_size.
1006                          */
1007                         if (!f->io_size) {
1008                                 if (f->file_offset > f->real_file_size)
1009                                         goto err_offset;
1010                                 f->io_size = f->real_file_size - f->file_offset;
1011                                 if (!f->io_size)
1012                                         log_info("fio: file %s may be ignored\n",
1013                                                 f->file_name);
1014                         }
1015                 } else if (f->real_file_size < o->file_size_low ||
1016                            f->real_file_size > o->file_size_high) {
1017                         if (f->file_offset > o->file_size_low)
1018                                 goto err_offset;
1019                         /*
1020                          * file size given. if it's fixed, use that. if it's a
1021                          * range, generate a random size in-between.
1022                          */
1023                         if (o->file_size_low == o->file_size_high)
1024                                 f->io_size = o->file_size_low - f->file_offset;
1025                         else {
1026                                 f->io_size = get_rand_file_size(td)
1027                                                 - f->file_offset;
1028                         }
1029                 } else
1030                         f->io_size = f->real_file_size - f->file_offset;
1031
1032                 if (f->io_size == -1ULL)
1033                         total_size = -1ULL;
1034                 else {
1035                         if (o->size_percent && o->size_percent != 100) {
1036                                 uint64_t file_size;
1037
1038                                 file_size = f->io_size + f->file_offset;
1039                                 f->io_size = (file_size *
1040                                               o->size_percent) / 100;
1041                                 if (f->io_size > (file_size - f->file_offset))
1042                                         f->io_size = file_size - f->file_offset;
1043
1044                                 f->io_size -= (f->io_size % td_min_bs(td));
1045                         }
1046                         total_size += f->io_size;
1047                 }
1048
1049                 if (f->filetype == FIO_TYPE_FILE &&
1050                     (f->io_size + f->file_offset) > f->real_file_size &&
1051                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
1052                         if (!o->create_on_open) {
1053                                 need_extend++;
1054                                 extend_size += (f->io_size + f->file_offset);
1055                                 fio_file_set_extend(f);
1056                         } else
1057                                 f->real_file_size = f->io_size + f->file_offset;
1058                 }
1059         }
1060
1061         if (td->o.block_error_hist) {
1062                 int len;
1063
1064                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1065                 f = td->files[0];
1066                 len = f->io_size / td->o.bs[DDIR_TRIM];
1067                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1068                         log_err("fio: cannot calculate block histogram with "
1069                                 "%d trim blocks, maximum %d\n",
1070                                 len, MAX_NR_BLOCK_INFOS);
1071                         td_verror(td, EINVAL, "block_error_hist");
1072                         goto err_out;
1073                 }
1074
1075                 td->ts.nr_block_infos = len;
1076                 for (i = 0; i < len; i++)
1077                         td->ts.block_infos[i] =
1078                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1079         } else
1080                 td->ts.nr_block_infos = 0;
1081
1082         if (!o->size || (total_size && o->size > total_size))
1083                 o->size = total_size;
1084
1085         if (o->size < td_min_bs(td)) {
1086                 log_err("fio: blocksize too large for data set\n");
1087                 goto err_out;
1088         }
1089
1090         /*
1091          * See if we need to extend some files, typically needed when our
1092          * target regular files don't exist yet, but our jobs require them
1093          * initially due to read I/Os.
1094          */
1095         if (need_extend) {
1096                 temp_stall_ts = 1;
1097                 if (output_format & FIO_OUTPUT_NORMAL) {
1098                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1099                                  o->name,
1100                                  need_extend > 1 ? "s" : "",
1101                                  need_extend,
1102                                  need_extend > 1 ? "s" : "",
1103                                  need_extend > 1 ? "total " : "",
1104                                  extend_size >> 20);
1105                 }
1106
1107                 for_each_file(td, f, i) {
1108                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1109
1110                         if (!fio_file_extend(f))
1111                                 continue;
1112
1113                         assert(f->filetype == FIO_TYPE_FILE);
1114                         fio_file_clear_extend(f);
1115                         if (!o->fill_device) {
1116                                 old_len = f->real_file_size;
1117                                 extend_len = f->io_size + f->file_offset -
1118                                                 old_len;
1119                         }
1120                         f->real_file_size = (f->io_size + f->file_offset);
1121                         err = extend_file(td, f);
1122                         if (err)
1123                                 break;
1124
1125                         err = __file_invalidate_cache(td, f, old_len,
1126                                                                 extend_len);
1127
1128                         /*
1129                          * Shut up static checker
1130                          */
1131                         if (f->fd != -1)
1132                                 close(f->fd);
1133
1134                         f->fd = -1;
1135                         if (err)
1136                                 break;
1137                 }
1138                 temp_stall_ts = 0;
1139         }
1140
1141         if (err)
1142                 goto err_out;
1143
1144         if (!o->zone_size)
1145                 o->zone_size = o->size;
1146
1147         /*
1148          * iolog already set the total io size, if we read back
1149          * stored entries.
1150          */
1151         if (!o->read_iolog_file) {
1152                 if (o->io_size)
1153                         td->total_io_size = o->io_size * o->loops;
1154                 else
1155                         td->total_io_size = o->size * o->loops;
1156         }
1157
1158 done:
1159         if (o->create_only)
1160                 td->done = 1;
1161
1162         td_restore_runstate(td, old_state);
1163         return 0;
1164 err_offset:
1165         log_err("%s: you need to specify valid offset=\n", o->name);
1166 err_out:
1167         td_restore_runstate(td, old_state);
1168         return 1;
1169 }
1170
1171 bool pre_read_files(struct thread_data *td)
1172 {
1173         struct fio_file *f;
1174         unsigned int i;
1175
1176         dprint(FD_FILE, "pre_read files\n");
1177
1178         for_each_file(td, f, i) {
1179                 if (!pre_read_file(td, f))
1180                         return false;
1181         }
1182
1183         return true;
1184 }
1185
1186 static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1187 {
1188         unsigned int range_size, seed;
1189         unsigned long nranges;
1190         uint64_t fsize;
1191
1192         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1193         fsize = min(f->real_file_size, f->io_size);
1194
1195         nranges = (fsize + range_size - 1) / range_size;
1196
1197         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1198         if (!td->o.rand_repeatable)
1199                 seed = td->rand_seeds[4];
1200
1201         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1202                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1203         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1204                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1205         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1206                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1207 }
1208
1209 static bool init_rand_distribution(struct thread_data *td)
1210 {
1211         struct fio_file *f;
1212         unsigned int i;
1213         int state;
1214
1215         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1216                 return false;
1217
1218         state = td_bump_runstate(td, TD_SETTING_UP);
1219
1220         for_each_file(td, f, i)
1221                 __init_rand_distribution(td, f);
1222
1223         td_restore_runstate(td, state);
1224         return true;
1225 }
1226
1227 /*
1228  * Check if the number of blocks exceeds the randomness capability of
1229  * the selected generator. Tausworthe is 32-bit, the others are fullly
1230  * 64-bit capable.
1231  */
1232 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1233                                  uint64_t blocks)
1234 {
1235         if (blocks <= FRAND32_MAX)
1236                 return 0;
1237         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1238                 return 0;
1239
1240         /*
1241          * If the user hasn't specified a random generator, switch
1242          * to tausworthe64 with informational warning. If the user did
1243          * specify one, just warn.
1244          */
1245         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1246                         f->file_name);
1247
1248         if (!fio_option_is_set(&td->o, random_generator)) {
1249                 log_info("fio: Switching to tausworthe64. Use the "
1250                          "random_generator= option to get rid of this "
1251                          "warning.\n");
1252                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1253                 return 0;
1254         }
1255
1256         /*
1257          * Just make this information to avoid breaking scripts.
1258          */
1259         log_info("fio: Use the random_generator= option to switch to lfsr or "
1260                          "tausworthe64.\n");
1261         return 0;
1262 }
1263
1264 bool init_random_map(struct thread_data *td)
1265 {
1266         unsigned long long blocks;
1267         struct fio_file *f;
1268         unsigned int i;
1269
1270         if (init_rand_distribution(td))
1271                 return true;
1272         if (!td_random(td))
1273                 return true;
1274
1275         for_each_file(td, f, i) {
1276                 uint64_t fsize = min(f->real_file_size, f->io_size);
1277
1278                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1279
1280                 if (check_rand_gen_limits(td, f, blocks))
1281                         return false;
1282
1283                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1284                         unsigned long seed;
1285
1286                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1287
1288                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1289                                 fio_file_set_lfsr(f);
1290                                 continue;
1291                         }
1292                 } else if (!td->o.norandommap) {
1293                         f->io_axmap = axmap_new(blocks);
1294                         if (f->io_axmap) {
1295                                 fio_file_set_axmap(f);
1296                                 continue;
1297                         }
1298                 } else if (td->o.norandommap)
1299                         continue;
1300
1301                 if (!td->o.softrandommap) {
1302                         log_err("fio: failed allocating random map. If running"
1303                                 " a large number of jobs, try the 'norandommap'"
1304                                 " option or set 'softrandommap'. Or give"
1305                                 " a larger --alloc-size to fio.\n");
1306                         return false;
1307                 }
1308
1309                 log_info("fio: file %s failed allocating random map. Running "
1310                          "job without.\n", f->file_name);
1311         }
1312
1313         return true;
1314 }
1315
1316 void close_files(struct thread_data *td)
1317 {
1318         struct fio_file *f;
1319         unsigned int i;
1320
1321         for_each_file(td, f, i) {
1322                 if (fio_file_open(f))
1323                         td_io_close_file(td, f);
1324         }
1325 }
1326
1327 void close_and_free_files(struct thread_data *td)
1328 {
1329         struct fio_file *f;
1330         unsigned int i;
1331         bool use_free = td_ioengine_flagged(td, FIO_NOFILEHASH);
1332
1333         dprint(FD_FILE, "close files\n");
1334
1335         for_each_file(td, f, i) {
1336                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1337                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1338                         td_io_unlink_file(td, f);
1339                 }
1340
1341                 if (fio_file_open(f))
1342                         td_io_close_file(td, f);
1343
1344                 remove_file_hash(f);
1345
1346                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1347                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1348                         td_io_unlink_file(td, f);
1349                 }
1350
1351                 if (use_free)
1352                         free(f->file_name);
1353                 else
1354                         sfree(f->file_name);
1355                 f->file_name = NULL;
1356                 if (fio_file_axmap(f)) {
1357                         axmap_free(f->io_axmap);
1358                         f->io_axmap = NULL;
1359                 }
1360                 if (use_free)
1361                         free(f);
1362                 else
1363                         sfree(f);
1364         }
1365
1366         td->o.filename = NULL;
1367         free(td->files);
1368         free(td->file_locks);
1369         td->files_index = 0;
1370         td->files = NULL;
1371         td->file_locks = NULL;
1372         td->o.file_lock_mode = FILE_LOCK_NONE;
1373         td->o.nr_files = 0;
1374 }
1375
1376 static void get_file_type(struct fio_file *f)
1377 {
1378         struct stat sb;
1379
1380         if (!strcmp(f->file_name, "-"))
1381                 f->filetype = FIO_TYPE_PIPE;
1382         else
1383                 f->filetype = FIO_TYPE_FILE;
1384
1385 #ifdef WIN32
1386         /* \\.\ is the device namespace in Windows, where every file is
1387          * a block device */
1388         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1389                 f->filetype = FIO_TYPE_BLOCK;
1390 #endif
1391
1392         if (!stat(f->file_name, &sb)) {
1393                 if (S_ISBLK(sb.st_mode))
1394                         f->filetype = FIO_TYPE_BLOCK;
1395                 else if (S_ISCHR(sb.st_mode))
1396                         f->filetype = FIO_TYPE_CHAR;
1397                 else if (S_ISFIFO(sb.st_mode))
1398                         f->filetype = FIO_TYPE_PIPE;
1399         }
1400 }
1401
1402 static bool __is_already_allocated(const char *fname, bool set)
1403 {
1404         struct flist_head *entry;
1405         bool ret;
1406
1407         ret = file_bloom_exists(fname, set);
1408         if (!ret)
1409                 return ret;
1410
1411         flist_for_each(entry, &filename_list) {
1412                 struct file_name *fn;
1413
1414                 fn = flist_entry(entry, struct file_name, list);
1415
1416                 if (!strcmp(fn->filename, fname))
1417                         return true;
1418         }
1419
1420         return false;
1421 }
1422
1423 static bool is_already_allocated(const char *fname)
1424 {
1425         bool ret;
1426
1427         fio_file_hash_lock();
1428         ret = __is_already_allocated(fname, false);
1429         fio_file_hash_unlock();
1430
1431         return ret;
1432 }
1433
1434 static void set_already_allocated(const char *fname)
1435 {
1436         struct file_name *fn;
1437
1438         fn = malloc(sizeof(struct file_name));
1439         fn->filename = strdup(fname);
1440
1441         fio_file_hash_lock();
1442         if (!__is_already_allocated(fname, true)) {
1443                 flist_add_tail(&fn->list, &filename_list);
1444                 fn = NULL;
1445         }
1446         fio_file_hash_unlock();
1447
1448         if (fn) {
1449                 free(fn->filename);
1450                 free(fn);
1451         }
1452 }
1453
1454 static void free_already_allocated(void)
1455 {
1456         struct flist_head *entry, *tmp;
1457         struct file_name *fn;
1458
1459         if (flist_empty(&filename_list))
1460                 return;
1461
1462         fio_file_hash_lock();
1463         flist_for_each_safe(entry, tmp, &filename_list) {
1464                 fn = flist_entry(entry, struct file_name, list);
1465                 free(fn->filename);
1466                 flist_del(&fn->list);
1467                 free(fn);
1468         }
1469
1470         fio_file_hash_unlock();
1471 }
1472
1473 static struct fio_file *alloc_new_file(struct thread_data *td)
1474 {
1475         struct fio_file *f;
1476
1477         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1478                 f = calloc(1, sizeof(*f));
1479         else
1480                 f = scalloc(1, sizeof(*f));
1481         if (!f) {
1482                 assert(0);
1483                 return NULL;
1484         }
1485
1486         f->fd = -1;
1487         f->shadow_fd = -1;
1488         fio_file_reset(td, f);
1489         return f;
1490 }
1491
1492 bool exists_and_not_regfile(const char *filename)
1493 {
1494         struct stat sb;
1495
1496         if (lstat(filename, &sb) == -1)
1497                 return false;
1498
1499 #ifndef WIN32 /* NOT Windows */
1500         if (S_ISREG(sb.st_mode))
1501                 return false;
1502 #else
1503         /* \\.\ is the device namespace in Windows, where every file
1504          * is a device node */
1505         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1506                 return false;
1507 #endif
1508
1509         return true;
1510 }
1511
1512 static bool create_work_dirs(struct thread_data *td, const char *fname)
1513 {
1514         char path[PATH_MAX];
1515         char *start, *end;
1516
1517         if (td->o.directory) {
1518                 snprintf(path, PATH_MAX, "%s%c%s", td->o.directory,
1519                          FIO_OS_PATH_SEPARATOR, fname);
1520                 start = strstr(path, fname);
1521         } else {
1522                 snprintf(path, PATH_MAX, "%s", fname);
1523                 start = path;
1524         }
1525
1526         end = start;
1527         while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
1528                 if (end == start)
1529                         break;
1530                 *end = '\0';
1531                 errno = 0;
1532 #ifdef CONFIG_HAVE_MKDIR_TWO
1533                 if (mkdir(path, 0600) && errno != EEXIST) {
1534 #else
1535                 if (mkdir(path) && errno != EEXIST) {
1536 #endif
1537                         log_err("fio: failed to create dir (%s): %d\n",
1538                                 start, errno);
1539                         return false;
1540                 }
1541                 *end = FIO_OS_PATH_SEPARATOR;
1542                 end++;
1543         }
1544         td->flags |= TD_F_DIRS_CREATED;
1545         return true;
1546 }
1547
1548 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1549 {
1550         int cur_files = td->files_index;
1551         char file_name[PATH_MAX];
1552         struct fio_file *f;
1553         int len = 0;
1554
1555         dprint(FD_FILE, "add file %s\n", fname);
1556
1557         if (td->o.directory)
1558                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1559                                         td->o.unique_filename);
1560
1561         sprintf(file_name + len, "%s", fname);
1562
1563         if (strchr(fname, FIO_OS_PATH_SEPARATOR) &&
1564             !(td->flags & TD_F_DIRS_CREATED) &&
1565             !create_work_dirs(td, fname))
1566                 return 1;
1567
1568         /* clean cloned siblings using existing files */
1569         if (numjob && is_already_allocated(file_name) &&
1570             !exists_and_not_regfile(fname))
1571                 return 0;
1572
1573         f = alloc_new_file(td);
1574
1575         if (td->files_size <= td->files_index) {
1576                 unsigned int new_size = td->o.nr_files + 1;
1577
1578                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1579
1580                 td->files = realloc(td->files, new_size * sizeof(f));
1581                 if (td->files == NULL) {
1582                         log_err("fio: realloc OOM\n");
1583                         assert(0);
1584                 }
1585                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1586                         td->file_locks = realloc(td->file_locks, new_size);
1587                         if (!td->file_locks) {
1588                                 log_err("fio: realloc OOM\n");
1589                                 assert(0);
1590                         }
1591                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1592                 }
1593                 td->files_size = new_size;
1594         }
1595         td->files[cur_files] = f;
1596         f->fileno = cur_files;
1597
1598         /*
1599          * init function, io engine may not be loaded yet
1600          */
1601         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1602                 f->real_file_size = -1ULL;
1603
1604         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1605                 f->file_name = strdup(file_name);
1606         else
1607                 f->file_name = smalloc_strdup(file_name);
1608
1609         /* can't handle smalloc failure from here */
1610         assert(f->file_name);
1611
1612         get_file_type(f);
1613
1614         switch (td->o.file_lock_mode) {
1615         case FILE_LOCK_NONE:
1616                 break;
1617         case FILE_LOCK_READWRITE:
1618                 f->rwlock = fio_rwlock_init();
1619                 break;
1620         case FILE_LOCK_EXCLUSIVE:
1621                 f->lock = fio_sem_init(FIO_SEM_UNLOCKED);
1622                 break;
1623         default:
1624                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1625                 assert(0);
1626         }
1627
1628         td->files_index++;
1629
1630         if (td->o.numjobs > 1)
1631                 set_already_allocated(file_name);
1632
1633         if (inc)
1634                 td->o.nr_files++;
1635
1636         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1637                                                         cur_files);
1638
1639         return cur_files;
1640 }
1641
1642 int add_file_exclusive(struct thread_data *td, const char *fname)
1643 {
1644         struct fio_file *f;
1645         unsigned int i;
1646
1647         for_each_file(td, f, i) {
1648                 if (!strcmp(f->file_name, fname))
1649                         return i;
1650         }
1651
1652         return add_file(td, fname, 0, 1);
1653 }
1654
1655 void get_file(struct fio_file *f)
1656 {
1657         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1658         assert(fio_file_open(f));
1659         f->references++;
1660 }
1661
1662 int put_file(struct thread_data *td, struct fio_file *f)
1663 {
1664         int f_ret = 0, ret = 0;
1665
1666         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1667
1668         if (!fio_file_open(f)) {
1669                 assert(f->fd == -1);
1670                 return 0;
1671         }
1672
1673         assert(f->references);
1674         if (--f->references)
1675                 return 0;
1676
1677         if (should_fsync(td) && td->o.fsync_on_close) {
1678                 f_ret = fsync(f->fd);
1679                 if (f_ret < 0)
1680                         f_ret = errno;
1681         }
1682
1683         if (td->io_ops->close_file)
1684                 ret = td->io_ops->close_file(td, f);
1685
1686         if (!ret)
1687                 ret = f_ret;
1688
1689         td->nr_open_files--;
1690         fio_file_clear_open(f);
1691         assert(f->fd == -1);
1692         return ret;
1693 }
1694
1695 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1696 {
1697         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1698                 return;
1699
1700         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1701                 if (ddir == DDIR_READ)
1702                         fio_rwlock_read(f->rwlock);
1703                 else
1704                         fio_rwlock_write(f->rwlock);
1705         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1706                 fio_sem_down(f->lock);
1707
1708         td->file_locks[f->fileno] = td->o.file_lock_mode;
1709 }
1710
1711 void unlock_file(struct thread_data *td, struct fio_file *f)
1712 {
1713         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1714                 return;
1715
1716         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1717                 fio_rwlock_unlock(f->rwlock);
1718         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1719                 fio_sem_up(f->lock);
1720
1721         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1722 }
1723
1724 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1725 {
1726         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1727                 return;
1728         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1729                 unlock_file(td, f);
1730 }
1731
1732 static bool recurse_dir(struct thread_data *td, const char *dirname)
1733 {
1734         struct dirent *dir;
1735         bool ret = false;
1736         DIR *D;
1737
1738         D = opendir(dirname);
1739         if (!D) {
1740                 char buf[FIO_VERROR_SIZE];
1741
1742                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1743                 td_verror(td, errno, buf);
1744                 return true;
1745         }
1746
1747         while ((dir = readdir(D)) != NULL) {
1748                 char full_path[PATH_MAX];
1749                 struct stat sb;
1750
1751                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1752                         continue;
1753
1754                 sprintf(full_path, "%s%c%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1755
1756                 if (lstat(full_path, &sb) == -1) {
1757                         if (errno != ENOENT) {
1758                                 td_verror(td, errno, "stat");
1759                                 ret = true;
1760                                 break;
1761                         }
1762                 }
1763
1764                 if (S_ISREG(sb.st_mode)) {
1765                         add_file(td, full_path, 0, 1);
1766                         continue;
1767                 }
1768                 if (!S_ISDIR(sb.st_mode))
1769                         continue;
1770
1771                 ret = recurse_dir(td, full_path);
1772                 if (ret)
1773                         break;
1774         }
1775
1776         closedir(D);
1777         return ret;
1778 }
1779
1780 int add_dir_files(struct thread_data *td, const char *path)
1781 {
1782         int ret = recurse_dir(td, path);
1783
1784         if (!ret)
1785                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1786
1787         return ret;
1788 }
1789
1790 void dup_files(struct thread_data *td, struct thread_data *org)
1791 {
1792         struct fio_file *f;
1793         unsigned int i;
1794
1795         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1796
1797         if (!org->files)
1798                 return;
1799
1800         td->files = malloc(org->files_index * sizeof(f));
1801
1802         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1803                 td->file_locks = malloc(org->files_index);
1804
1805         for_each_file(org, f, i) {
1806                 struct fio_file *__f;
1807
1808                 __f = alloc_new_file(td);
1809
1810                 if (f->file_name) {
1811                         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1812                                 __f->file_name = strdup(f->file_name);
1813                         else
1814                                 __f->file_name = smalloc_strdup(f->file_name);
1815
1816                         /* can't handle smalloc failure from here */
1817                         assert(__f->file_name);
1818                         __f->filetype = f->filetype;
1819                 }
1820
1821                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1822                         __f->lock = f->lock;
1823                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1824                         __f->rwlock = f->rwlock;
1825
1826                 td->files[i] = __f;
1827         }
1828 }
1829
1830 /*
1831  * Returns the index that matches the filename, or -1 if not there
1832  */
1833 int get_fileno(struct thread_data *td, const char *fname)
1834 {
1835         struct fio_file *f;
1836         unsigned int i;
1837
1838         for_each_file(td, f, i)
1839                 if (!strcmp(f->file_name, fname))
1840                         return i;
1841
1842         return -1;
1843 }
1844
1845 /*
1846  * For log usage, where we add/open/close files automatically
1847  */
1848 void free_release_files(struct thread_data *td)
1849 {
1850         close_files(td);
1851         td->o.nr_files = 0;
1852         td->o.open_files = 0;
1853         td->files_index = 0;
1854 }
1855
1856 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1857 {
1858         int i;
1859
1860         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1861                 f->last_pos[i] = f->file_offset;
1862                 f->last_start[i] = -1ULL;
1863         }
1864
1865         if (fio_file_axmap(f))
1866                 axmap_reset(f->io_axmap);
1867         else if (fio_file_lfsr(f))
1868                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1869 }
1870
1871 bool fio_files_done(struct thread_data *td)
1872 {
1873         struct fio_file *f;
1874         unsigned int i;
1875
1876         for_each_file(td, f, i)
1877                 if (!fio_file_done(f))
1878                         return false;
1879
1880         return true;
1881 }
1882
1883 /* free memory used in initialization phase only */
1884 void filesetup_mem_free(void)
1885 {
1886         free_already_allocated();
1887 }
1888
1889 /*
1890  * This function is for platforms which support direct I/O but not O_DIRECT.
1891  */
1892 int fio_set_directio(struct thread_data *td, struct fio_file *f)
1893 {
1894 #ifdef FIO_OS_DIRECTIO
1895         int ret = fio_set_odirect(f);
1896
1897         if (ret) {
1898                 td_verror(td, ret, "fio_set_directio");
1899 #if defined(__sun__)
1900                 if (ret == ENOTTY) { /* ENOTTY suggests RAW device or ZFS */
1901                         log_err("fio: doing directIO to RAW devices or ZFS not supported\n");
1902                 } else {
1903                         log_err("fio: the file system does not seem to support direct IO\n");
1904                 }
1905 #else
1906                 log_err("fio: the file system does not seem to support direct IO\n");
1907 #endif
1908                 return -1;
1909         }
1910
1911         return 0;
1912 #else
1913         log_err("fio: direct IO is not supported on this host operating system\n");
1914         return -1;
1915 #endif
1916 }