1c36ff8fdecd66ec63fc35ea74ac9c1bf5e4fcb3
[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
19 #ifdef CONFIG_LINUX_FALLOCATE
20 #include <linux/falloc.h>
21 #endif
22
23 static int root_warn;
24
25 static FLIST_HEAD(filename_list);
26
27 /*
28  * List entry for filename_list
29  */
30 struct file_name {
31         struct flist_head list;
32         char *filename;
33 };
34
35 static inline void clear_error(struct thread_data *td)
36 {
37         td->error = 0;
38         td->verror[0] = '\0';
39 }
40
41 static int native_fallocate(struct thread_data *td, struct fio_file *f)
42 {
43         bool success;
44
45         success = fio_fallocate(f, 0, f->real_file_size);
46         dprint(FD_FILE, "native fallocate of file %s size %llu was "
47                         "%ssuccessful\n", f->file_name,
48                         (unsigned long long) f->real_file_size,
49                         !success ? "un": "");
50
51         if (success)
52                 return false;
53
54         if (errno == ENOSYS)
55                 dprint(FD_FILE, "native fallocate is not implemented\n");
56
57         return true;
58 }
59
60 static void fallocate_file(struct thread_data *td, struct fio_file *f)
61 {
62         int r;
63
64         if (td->o.fill_device)
65                 return;
66
67         switch (td->o.fallocate_mode) {
68         case FIO_FALLOCATE_NATIVE:
69                 native_fallocate(td, f);
70                 break;
71         case FIO_FALLOCATE_NONE:
72                 break;
73 #ifdef CONFIG_POSIX_FALLOCATE
74         case FIO_FALLOCATE_POSIX:
75                 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
76                                  f->file_name,
77                                  (unsigned long long) f->real_file_size);
78
79                 r = posix_fallocate(f->fd, 0, f->real_file_size);
80                 if (r > 0)
81                         log_err("fio: posix_fallocate fails: %s\n", strerror(r));
82                 break;
83 #endif /* CONFIG_POSIX_FALLOCATE */
84 #ifdef CONFIG_LINUX_FALLOCATE
85         case FIO_FALLOCATE_KEEP_SIZE:
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 #endif /* CONFIG_LINUX_FALLOCATE */
96         default:
97                 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
98                 assert(0);
99         }
100 }
101
102 /*
103  * Leaves f->fd open on success, caller must close
104  */
105 static int extend_file(struct thread_data *td, struct fio_file *f)
106 {
107         int new_layout = 0, unlink_file = 0, flags;
108         unsigned long long left;
109         unsigned int bs;
110         char *b = NULL;
111
112         if (read_only) {
113                 log_err("fio: refusing extend of file due to read-only\n");
114                 return 0;
115         }
116
117         /*
118          * check if we need to lay the file out complete again. fio
119          * does that for operations involving reads, or for writes
120          * where overwrite is set
121          */
122         if (td_read(td) ||
123            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
124             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
125                 new_layout = 1;
126         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
127                 unlink_file = 1;
128
129         if (unlink_file || new_layout) {
130                 int ret;
131
132                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
133
134                 ret = td_io_unlink_file(td, f);
135                 if (ret != 0 && ret != ENOENT) {
136                         td_verror(td, errno, "unlink");
137                         return 1;
138                 }
139         }
140
141         flags = O_WRONLY;
142         if (td->o.allow_create)
143                 flags |= O_CREAT;
144         if (new_layout)
145                 flags |= O_TRUNC;
146
147 #ifdef WIN32
148         flags |= _O_BINARY;
149 #endif
150
151         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
152         f->fd = open(f->file_name, flags, 0644);
153         if (f->fd < 0) {
154                 int err = errno;
155
156                 if (err == ENOENT && !td->o.allow_create)
157                         log_err("fio: file creation disallowed by "
158                                         "allow_file_create=0\n");
159                 else
160                         td_verror(td, err, "open");
161                 return 1;
162         }
163
164         fallocate_file(td, f);
165
166         /*
167          * If our jobs don't require regular files initially, we're done.
168          */
169         if (!new_layout)
170                 goto done;
171
172         /*
173          * The size will be -1ULL when fill_device is used, so don't truncate
174          * or fallocate this file, just write it
175          */
176         if (!td->o.fill_device) {
177                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
178                                         (unsigned long long) f->real_file_size);
179                 if (ftruncate(f->fd, f->real_file_size) == -1) {
180                         if (errno != EFBIG) {
181                                 td_verror(td, errno, "ftruncate");
182                                 goto err;
183                         }
184                 }
185         }
186
187         left = f->real_file_size;
188         bs = td->o.max_bs[DDIR_WRITE];
189         if (bs > left)
190                 bs = left;
191
192         b = malloc(bs);
193         if (!b) {
194                 td_verror(td, errno, "malloc");
195                 goto err;
196         }
197
198         while (left && !td->terminate) {
199                 ssize_t r;
200
201                 if (bs > left)
202                         bs = left;
203
204                 fill_io_buffer(td, b, bs, bs);
205
206                 r = write(f->fd, b, bs);
207
208                 if (r > 0) {
209                         left -= r;
210                         continue;
211                 } else {
212                         if (r < 0) {
213                                 int __e = errno;
214
215                                 if (__e == ENOSPC) {
216                                         if (td->o.fill_device)
217                                                 break;
218                                         log_info("fio: ENOSPC on laying out "
219                                                  "file, stopping\n");
220                                         break;
221                                 }
222                                 td_verror(td, errno, "write");
223                         } else
224                                 td_verror(td, EIO, "write");
225
226                         break;
227                 }
228         }
229
230         if (td->terminate) {
231                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
232                 td_io_unlink_file(td, f);
233         } else if (td->o.create_fsync) {
234                 if (fsync(f->fd) < 0) {
235                         td_verror(td, errno, "fsync");
236                         goto err;
237                 }
238         }
239         if (td->o.fill_device && !td_write(td)) {
240                 fio_file_clear_size_known(f);
241                 if (td_io_get_file_size(td, f))
242                         goto err;
243                 if (f->io_size > f->real_file_size)
244                         f->io_size = f->real_file_size;
245         }
246
247         free(b);
248 done:
249         return 0;
250 err:
251         close(f->fd);
252         f->fd = -1;
253         if (b)
254                 free(b);
255         return 1;
256 }
257
258 static bool pre_read_file(struct thread_data *td, struct fio_file *f)
259 {
260         int r, did_open = 0, old_runstate;
261         unsigned long long left;
262         unsigned int bs;
263         bool ret = true;
264         char *b;
265
266         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
267             td_ioengine_flagged(td, FIO_NOIO))
268                 return true;
269
270         if (f->filetype == FIO_TYPE_CHAR)
271                 return true;
272
273         if (!fio_file_open(f)) {
274                 if (td->io_ops->open_file(td, f)) {
275                         log_err("fio: cannot pre-read, failed to open file\n");
276                         return false;
277                 }
278                 did_open = 1;
279         }
280
281         old_runstate = td_bump_runstate(td, TD_PRE_READING);
282
283         left = f->io_size;
284         bs = td->o.max_bs[DDIR_READ];
285         if (bs > left)
286                 bs = left;
287
288         b = malloc(bs);
289         if (!b) {
290                 td_verror(td, errno, "malloc");
291                 ret = false;
292                 goto error;
293         }
294         memset(b, 0, bs);
295
296         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
297                 td_verror(td, errno, "lseek");
298                 log_err("fio: failed to lseek pre-read file\n");
299                 ret = false;
300                 goto error;
301         }
302
303         while (left && !td->terminate) {
304                 if (bs > left)
305                         bs = left;
306
307                 r = read(f->fd, b, bs);
308
309                 if (r == (int) bs) {
310                         left -= bs;
311                         continue;
312                 } else {
313                         td_verror(td, EIO, "pre_read");
314                         break;
315                 }
316         }
317
318 error:
319         td_restore_runstate(td, old_runstate);
320
321         if (did_open)
322                 td->io_ops->close_file(td, f);
323
324         free(b);
325         return ret;
326 }
327
328 unsigned long long get_rand_file_size(struct thread_data *td)
329 {
330         unsigned long long ret, sized;
331         uint64_t frand_max;
332         unsigned long r;
333
334         frand_max = rand_max(&td->file_size_state);
335         r = __rand(&td->file_size_state);
336         sized = td->o.file_size_high - td->o.file_size_low;
337         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
338         ret += td->o.file_size_low;
339         ret -= (ret % td->o.rw_min_bs);
340         return ret;
341 }
342
343 static int file_size(struct thread_data *td, struct fio_file *f)
344 {
345         struct stat st;
346
347         if (stat(f->file_name, &st) == -1) {
348                 td_verror(td, errno, "fstat");
349                 return 1;
350         }
351
352         f->real_file_size = st.st_size;
353         return 0;
354 }
355
356 static int bdev_size(struct thread_data *td, struct fio_file *f)
357 {
358         unsigned long long bytes = 0;
359         int r;
360
361         if (td->io_ops->open_file(td, f)) {
362                 log_err("fio: failed opening blockdev %s for size check\n",
363                         f->file_name);
364                 return 1;
365         }
366
367         r = blockdev_size(f, &bytes);
368         if (r) {
369                 td_verror(td, r, "blockdev_size");
370                 goto err;
371         }
372
373         if (!bytes) {
374                 log_err("%s: zero sized block device?\n", f->file_name);
375                 goto err;
376         }
377
378         f->real_file_size = bytes;
379         td->io_ops->close_file(td, f);
380         return 0;
381 err:
382         td->io_ops->close_file(td, f);
383         return 1;
384 }
385
386 static int char_size(struct thread_data *td, struct fio_file *f)
387 {
388 #ifdef FIO_HAVE_CHARDEV_SIZE
389         unsigned long long bytes = 0;
390         int r;
391
392         if (td->io_ops->open_file(td, f)) {
393                 log_err("fio: failed opening chardev %s for size check\n",
394                         f->file_name);
395                 return 1;
396         }
397
398         r = chardev_size(f, &bytes);
399         if (r) {
400                 td_verror(td, r, "chardev_size");
401                 goto err;
402         }
403
404         if (!bytes) {
405                 log_err("%s: zero sized char device?\n", f->file_name);
406                 goto err;
407         }
408
409         f->real_file_size = bytes;
410         td->io_ops->close_file(td, f);
411         return 0;
412 err:
413         td->io_ops->close_file(td, f);
414         return 1;
415 #else
416         f->real_file_size = -1ULL;
417         return 0;
418 #endif
419 }
420
421 static int get_file_size(struct thread_data *td, struct fio_file *f)
422 {
423         int ret = 0;
424
425         if (fio_file_size_known(f))
426                 return 0;
427
428         if (f->filetype == FIO_TYPE_FILE)
429                 ret = file_size(td, f);
430         else if (f->filetype == FIO_TYPE_BLOCK)
431                 ret = bdev_size(td, f);
432         else if (f->filetype == FIO_TYPE_CHAR)
433                 ret = char_size(td, f);
434         else
435                 f->real_file_size = -1ULL;
436
437         /*
438          * Leave ->real_file_size with 0 since it could be expectation
439          * of initial setup for regular files.
440          */
441         if (ret)
442                 return ret;
443
444         /*
445          * If ->real_file_size is -1, a conditional for the message
446          * "offset extends end" is always true, but it makes no sense,
447          * so just return the same value here.
448          */
449         if (f->real_file_size == -1ULL) {
450                 log_info("%s: failed to get file size of %s\n", td->o.name,
451                                         f->file_name);
452                 return 1;
453         }
454
455         if (td->o.start_offset && f->file_offset == 0)
456                 dprint(FD_FILE, "offset of file %s not initialized yet\n",
457                                         f->file_name);
458         /*
459          * ->file_offset normally hasn't been initialized yet, so this
460          * is basically always false.
461          */
462         if (f->file_offset > f->real_file_size) {
463                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
464                                         (unsigned long long) f->file_offset,
465                                         (unsigned long long) f->real_file_size);
466                 return 1;
467         }
468
469         fio_file_set_size_known(f);
470         return 0;
471 }
472
473 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
474                                    unsigned long long off,
475                                    unsigned long long len)
476 {
477         int errval = 0, ret = 0;
478
479 #ifdef CONFIG_ESX
480         return 0;
481 #endif
482
483         if (len == -1ULL)
484                 len = f->io_size;
485         if (off == -1ULL)
486                 off = f->file_offset;
487
488         if (len == -1ULL || off == -1ULL)
489                 return 0;
490
491         if (td->io_ops->invalidate) {
492                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
493                         f->file_name);
494                 ret = td->io_ops->invalidate(td, f);
495                 if (ret < 0)
496                         errval = -ret;
497         } else if (f->filetype == FIO_TYPE_FILE) {
498                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
499                         f->file_name, off, len);
500                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
501                 if (ret)
502                         errval = ret;
503         } else if (f->filetype == FIO_TYPE_BLOCK) {
504                 int retry_count = 0;
505
506                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
507                 ret = blockdev_invalidate_cache(f);
508                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
509                         /*
510                          * Linux multipath devices reject ioctl while
511                          * the maps are being updated. That window can
512                          * last tens of milliseconds; we'll try up to
513                          * a quarter of a second.
514                          */
515                         usleep(10000);
516                         ret = blockdev_invalidate_cache(f);
517                 }
518                 if (ret < 0 && errno == EACCES && geteuid()) {
519                         if (!root_warn) {
520                                 log_err("fio: only root may flush block "
521                                         "devices. Cache flush bypassed!\n");
522                                 root_warn = 1;
523                         }
524                         ret = 0;
525                 }
526                 if (ret < 0)
527                         errval = errno;
528         } else if (f->filetype == FIO_TYPE_CHAR ||
529                    f->filetype == FIO_TYPE_PIPE) {
530                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
531                 ret = 0;
532         }
533
534         /*
535          * Cache flushing isn't a fatal condition, and we know it will
536          * happen on some platforms where we don't have the proper
537          * function to flush eg block device caches. So just warn and
538          * continue on our way.
539          */
540         if (errval)
541                 log_info("fio: cache invalidation of %s failed: %s\n",
542                          f->file_name, strerror(errval));
543
544         return 0;
545
546 }
547
548 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
549 {
550         if (!fio_file_open(f))
551                 return 0;
552
553         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
554 }
555
556 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
557 {
558         int ret = 0;
559
560         dprint(FD_FILE, "fd close %s\n", f->file_name);
561
562         remove_file_hash(f);
563
564         if (close(f->fd) < 0)
565                 ret = errno;
566
567         f->fd = -1;
568
569         if (f->shadow_fd != -1) {
570                 close(f->shadow_fd);
571                 f->shadow_fd = -1;
572         }
573
574         f->engine_pos = 0;
575         return ret;
576 }
577
578 int file_lookup_open(struct fio_file *f, int flags)
579 {
580         struct fio_file *__f;
581         int from_hash;
582
583         __f = lookup_file_hash(f->file_name);
584         if (__f) {
585                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
586                 f->lock = __f->lock;
587                 from_hash = 1;
588         } else {
589                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
590                 from_hash = 0;
591         }
592
593 #ifdef WIN32
594         flags |= _O_BINARY;
595 #endif
596
597         f->fd = open(f->file_name, flags, 0600);
598         return from_hash;
599 }
600
601 static int file_close_shadow_fds(struct thread_data *td)
602 {
603         struct fio_file *f;
604         int num_closed = 0;
605         unsigned int i;
606
607         for_each_file(td, f, i) {
608                 if (f->shadow_fd == -1)
609                         continue;
610
611                 close(f->shadow_fd);
612                 f->shadow_fd = -1;
613                 num_closed++;
614         }
615
616         return num_closed;
617 }
618
619 int generic_open_file(struct thread_data *td, struct fio_file *f)
620 {
621         int is_std = 0;
622         int flags = 0;
623         int from_hash = 0;
624
625         dprint(FD_FILE, "fd open %s\n", f->file_name);
626
627         if (!strcmp(f->file_name, "-")) {
628                 if (td_rw(td)) {
629                         log_err("fio: can't read/write to stdin/out\n");
630                         return 1;
631                 }
632                 is_std = 1;
633
634                 /*
635                  * move output logging to stderr, if we are writing to stdout
636                  */
637                 if (td_write(td))
638                         f_out = stderr;
639         }
640
641         if (td_trim(td))
642                 goto skip_flags;
643         if (td->o.odirect)
644                 flags |= OS_O_DIRECT;
645         if (td->o.oatomic) {
646                 if (!FIO_O_ATOMIC) {
647                         td_verror(td, EINVAL, "OS does not support atomic IO");
648                         return 1;
649                 }
650                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
651         }
652         if (td->o.sync_io)
653                 flags |= O_SYNC;
654         if (td->o.create_on_open && td->o.allow_create)
655                 flags |= O_CREAT;
656 skip_flags:
657         if (f->filetype != FIO_TYPE_FILE)
658                 flags |= FIO_O_NOATIME;
659
660 open_again:
661         if (td_write(td)) {
662                 if (!read_only)
663                         flags |= O_RDWR;
664
665                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
666                         flags |= O_CREAT;
667
668                 if (is_std)
669                         f->fd = dup(STDOUT_FILENO);
670                 else
671                         from_hash = file_lookup_open(f, flags);
672         } else if (td_read(td)) {
673                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
674                         flags |= O_RDWR;
675                 else
676                         flags |= O_RDONLY;
677
678                 if (is_std)
679                         f->fd = dup(STDIN_FILENO);
680                 else
681                         from_hash = file_lookup_open(f, flags);
682         } else if (td_trim(td)) {
683                 assert(!td_rw(td)); /* should have matched above */
684                 flags |= O_RDWR;
685                 from_hash = file_lookup_open(f, flags);
686         }
687
688         if (f->fd == -1) {
689                 char buf[FIO_VERROR_SIZE];
690                 int __e = errno;
691
692                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
693                         flags &= ~FIO_O_NOATIME;
694                         goto open_again;
695                 }
696                 if (__e == EMFILE && file_close_shadow_fds(td))
697                         goto open_again;
698
699                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
700
701                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
702                         log_err("fio: looks like your file system does not " \
703                                 "support direct=1/buffered=0\n");
704                 }
705
706                 td_verror(td, __e, buf);
707                 return 1;
708         }
709
710         if (!from_hash && f->fd != -1) {
711                 if (add_file_hash(f)) {
712                         int fio_unused ret;
713
714                         /*
715                          * Stash away descriptor for later close. This is to
716                          * work-around a "feature" on Linux, where a close of
717                          * an fd that has been opened for write will trigger
718                          * udev to call blkid to check partitions, fs id, etc.
719                          * That pollutes the device cache, which can slow down
720                          * unbuffered accesses.
721                          */
722                         if (f->shadow_fd == -1)
723                                 f->shadow_fd = f->fd;
724                         else {
725                                 /*
726                                  * OK to ignore, we haven't done anything
727                                  * with it
728                                  */
729                                 ret = generic_close_file(td, f);
730                         }
731                         goto open_again;
732                 }
733         }
734
735         return 0;
736 }
737
738 /*
739  * This function i.e. get_file_size() is the default .get_file_size
740  * implementation of majority of I/O engines.
741  */
742 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
743 {
744         return get_file_size(td, f);
745 }
746
747 /*
748  * open/close all files, so that ->real_file_size gets set
749  */
750 static int get_file_sizes(struct thread_data *td)
751 {
752         struct fio_file *f;
753         unsigned int i;
754         int err = 0;
755
756         for_each_file(td, f, i) {
757                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
758                                                                 f->file_name);
759
760                 if (td_io_get_file_size(td, f)) {
761                         if (td->error != ENOENT) {
762                                 log_err("%s\n", td->verror);
763                                 err = 1;
764                                 break;
765                         }
766                         clear_error(td);
767                 }
768
769                 /*
770                  * There are corner cases where we end up with -1 for
771                  * ->real_file_size due to unsupported file type, etc.
772                  * We then just set to size option value divided by number
773                  * of files, similar to the way file ->io_size is set.
774                  * stat(2) failure doesn't set ->real_file_size to -1.
775                  */
776                 if (f->real_file_size == -1ULL && td->o.size)
777                         f->real_file_size = td->o.size / td->o.nr_files;
778         }
779
780         return err;
781 }
782
783 struct fio_mount {
784         struct flist_head list;
785         const char *base;
786         char __base[256];
787         unsigned int key;
788 };
789
790 /*
791  * Get free number of bytes for each file on each unique mount.
792  */
793 static unsigned long long get_fs_free_counts(struct thread_data *td)
794 {
795         struct flist_head *n, *tmp;
796         unsigned long long ret = 0;
797         struct fio_mount *fm;
798         FLIST_HEAD(list);
799         struct fio_file *f;
800         unsigned int i;
801
802         for_each_file(td, f, i) {
803                 struct stat sb;
804                 char buf[256];
805
806                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
807                         if (f->real_file_size != -1ULL)
808                                 ret += f->real_file_size;
809                         continue;
810                 } else if (f->filetype != FIO_TYPE_FILE)
811                         continue;
812
813                 buf[255] = '\0';
814                 strncpy(buf, f->file_name, 255);
815
816                 if (stat(buf, &sb) < 0) {
817                         if (errno != ENOENT)
818                                 break;
819                         strcpy(buf, ".");
820                         if (stat(buf, &sb) < 0)
821                                 break;
822                 }
823
824                 fm = NULL;
825                 flist_for_each(n, &list) {
826                         fm = flist_entry(n, struct fio_mount, list);
827                         if (fm->key == sb.st_dev)
828                                 break;
829
830                         fm = NULL;
831                 }
832
833                 if (fm)
834                         continue;
835
836                 fm = calloc(1, sizeof(*fm));
837                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
838                 fm->base = basename(fm->__base);
839                 fm->key = sb.st_dev;
840                 flist_add(&fm->list, &list);
841         }
842
843         flist_for_each_safe(n, tmp, &list) {
844                 unsigned long long sz;
845
846                 fm = flist_entry(n, struct fio_mount, list);
847                 flist_del(&fm->list);
848
849                 sz = get_fs_free_size(fm->base);
850                 if (sz && sz != -1ULL)
851                         ret += sz;
852
853                 free(fm);
854         }
855
856         return ret;
857 }
858
859 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
860 {
861         struct thread_options *o = &td->o;
862         unsigned long long align_bs;
863         unsigned long long offset;
864
865         if (o->file_append && f->filetype == FIO_TYPE_FILE)
866                 return f->real_file_size;
867
868         if (o->start_offset_percent > 0) {
869                 /*
870                  * if offset_align is provided, set initial offset
871                  */
872                 if (fio_option_is_set(o, start_offset_align)) {
873                         align_bs = o->start_offset_align;
874                 } else {
875                         /* else take the minimum block size */
876                         align_bs = td_min_bs(td);
877                 }
878
879                 /* calculate the raw offset */
880                 offset = (f->real_file_size * o->start_offset_percent / 100) +
881                         (td->subjob_number * o->offset_increment);
882
883                 /*
884                  * block align the offset at the next available boundary at
885                  * ceiling(offset / align_bs) * align_bs
886                  */
887                 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
888
889         } else {
890                 /* start_offset_percent not set */
891                 offset = o->start_offset +
892                                 td->subjob_number * o->offset_increment;
893         }
894
895         return offset;
896 }
897
898 /*
899  * Open the files and setup files sizes, creating files if necessary.
900  */
901 int setup_files(struct thread_data *td)
902 {
903         unsigned long long total_size, extend_size;
904         struct thread_options *o = &td->o;
905         struct fio_file *f;
906         unsigned int i, nr_fs_extra = 0;
907         int err = 0, need_extend;
908         int old_state;
909         const unsigned int bs = td_min_bs(td);
910         uint64_t fs = 0;
911
912         dprint(FD_FILE, "setup files\n");
913
914         old_state = td_bump_runstate(td, TD_SETTING_UP);
915
916         if (o->read_iolog_file)
917                 goto done;
918
919         /*
920          * Find out physical size of files or devices for this thread,
921          * before we determine I/O size and range of our targets.
922          * If ioengine defines a setup() method, it's responsible for
923          * opening the files and setting f->real_file_size to indicate
924          * the valid range for that file.
925          */
926         if (td->io_ops->setup)
927                 err = td->io_ops->setup(td);
928         else
929                 err = get_file_sizes(td);
930
931         if (err)
932                 goto err_out;
933
934         /*
935          * check sizes. if the files/devices do not exist and the size
936          * isn't passed to fio, abort.
937          */
938         total_size = 0;
939         for_each_file(td, f, i) {
940                 f->fileno = i;
941                 if (f->real_file_size == -1ULL)
942                         total_size = -1ULL;
943                 else
944                         total_size += f->real_file_size;
945         }
946
947         if (o->fill_device)
948                 td->fill_device_size = get_fs_free_counts(td);
949
950         /*
951          * device/file sizes are zero and no size given, punt
952          */
953         if ((!total_size || total_size == -1ULL) && !o->size &&
954             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
955             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
956                 log_err("%s: you need to specify size=\n", o->name);
957                 td_verror(td, EINVAL, "total_file_size");
958                 goto err_out;
959         }
960
961         /*
962          * Calculate per-file size and potential extra size for the
963          * first files, if needed (i.e. if we don't have a fixed size).
964          */
965         if (!o->file_size_low && o->nr_files) {
966                 uint64_t all_fs;
967
968                 fs = o->size / o->nr_files;
969                 all_fs = fs * o->nr_files;
970
971                 if (all_fs < o->size)
972                         nr_fs_extra = (o->size - all_fs) / bs;
973         }
974
975         /*
976          * now file sizes are known, so we can set ->io_size. if size= is
977          * not given, ->io_size is just equal to ->real_file_size. if size
978          * is given, ->io_size is size / nr_files.
979          */
980         extend_size = total_size = 0;
981         need_extend = 0;
982         for_each_file(td, f, i) {
983                 f->file_offset = get_start_offset(td, f);
984
985                 /*
986                  * Update ->io_size depending on options specified.
987                  * ->file_size_low being 0 means filesize option isn't set.
988                  * Non zero ->file_size_low equals ->file_size_high means
989                  * filesize option is set in a fixed size format.
990                  * Non zero ->file_size_low not equals ->file_size_high means
991                  * filesize option is set in a range format.
992                  */
993                 if (!o->file_size_low) {
994                         /*
995                          * no file size or range given, file size is equal to
996                          * total size divided by number of files. If the size
997                          * doesn't divide nicely with the min blocksize,
998                          * make the first files bigger.
999                          */
1000                         f->io_size = fs;
1001                         if (nr_fs_extra) {
1002                                 nr_fs_extra--;
1003                                 f->io_size += bs;
1004                         }
1005
1006                         /*
1007                          * We normally don't come here for regular files, but
1008                          * if the result is 0 for a regular file, set it to the
1009                          * real file size. This could be size of the existing
1010                          * one if it already exists, but otherwise will be set
1011                          * to 0. A new file won't be created because
1012                          * ->io_size + ->file_offset equals ->real_file_size.
1013                          */
1014                         if (!f->io_size) {
1015                                 if (f->file_offset > f->real_file_size)
1016                                         goto err_offset;
1017                                 f->io_size = f->real_file_size - f->file_offset;
1018                                 if (!f->io_size)
1019                                         log_info("fio: file %s may be ignored\n",
1020                                                 f->file_name);
1021                         }
1022                 } else if (f->real_file_size < o->file_size_low ||
1023                            f->real_file_size > o->file_size_high) {
1024                         if (f->file_offset > o->file_size_low)
1025                                 goto err_offset;
1026                         /*
1027                          * file size given. if it's fixed, use that. if it's a
1028                          * range, generate a random size in-between.
1029                          */
1030                         if (o->file_size_low == o->file_size_high)
1031                                 f->io_size = o->file_size_low - f->file_offset;
1032                         else {
1033                                 f->io_size = get_rand_file_size(td)
1034                                                 - f->file_offset;
1035                         }
1036                 } else
1037                         f->io_size = f->real_file_size - f->file_offset;
1038
1039                 if (f->io_size == -1ULL)
1040                         total_size = -1ULL;
1041                 else {
1042                         if (o->size_percent) {
1043                                 uint64_t file_size;
1044
1045                                 file_size = f->io_size + f->file_offset;
1046                                 f->io_size = (file_size *
1047                                               o->size_percent) / 100;
1048                                 if (f->io_size > (file_size - f->file_offset))
1049                                         f->io_size = file_size - f->file_offset;
1050
1051                                 f->io_size -= (f->io_size % td_min_bs(td));
1052                         }
1053                         total_size += f->io_size;
1054                 }
1055
1056                 if (f->filetype == FIO_TYPE_FILE &&
1057                     (f->io_size + f->file_offset) > f->real_file_size &&
1058                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
1059                         if (!o->create_on_open) {
1060                                 need_extend++;
1061                                 extend_size += (f->io_size + f->file_offset);
1062                                 fio_file_set_extend(f);
1063                         } else
1064                                 f->real_file_size = f->io_size + f->file_offset;
1065                 }
1066         }
1067
1068         if (td->o.block_error_hist) {
1069                 int len;
1070
1071                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1072                 f = td->files[0];
1073                 len = f->io_size / td->o.bs[DDIR_TRIM];
1074                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1075                         log_err("fio: cannot calculate block histogram with "
1076                                 "%d trim blocks, maximum %d\n",
1077                                 len, MAX_NR_BLOCK_INFOS);
1078                         td_verror(td, EINVAL, "block_error_hist");
1079                         goto err_out;
1080                 }
1081
1082                 td->ts.nr_block_infos = len;
1083                 for (i = 0; i < len; i++)
1084                         td->ts.block_infos[i] =
1085                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1086         } else
1087                 td->ts.nr_block_infos = 0;
1088
1089         if (!o->size || (total_size && o->size > total_size))
1090                 o->size = total_size;
1091
1092         if (o->size < td_min_bs(td)) {
1093                 log_err("fio: blocksize too large for data set\n");
1094                 goto err_out;
1095         }
1096
1097         /*
1098          * See if we need to extend some files, typically needed when our
1099          * target regular files don't exist yet, but our jobs require them
1100          * initially due to read I/Os.
1101          */
1102         if (need_extend) {
1103                 temp_stall_ts = 1;
1104                 if (output_format & FIO_OUTPUT_NORMAL) {
1105                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1106                                  o->name,
1107                                  need_extend > 1 ? "s" : "",
1108                                  need_extend,
1109                                  need_extend > 1 ? "s" : "",
1110                                  need_extend > 1 ? "total " : "",
1111                                  extend_size >> 20);
1112                 }
1113
1114                 for_each_file(td, f, i) {
1115                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1116
1117                         if (!fio_file_extend(f))
1118                                 continue;
1119
1120                         assert(f->filetype == FIO_TYPE_FILE);
1121                         fio_file_clear_extend(f);
1122                         if (!o->fill_device) {
1123                                 old_len = f->real_file_size;
1124                                 extend_len = f->io_size + f->file_offset -
1125                                                 old_len;
1126                         }
1127                         f->real_file_size = (f->io_size + f->file_offset);
1128                         err = extend_file(td, f);
1129                         if (err)
1130                                 break;
1131
1132                         err = __file_invalidate_cache(td, f, old_len,
1133                                                                 extend_len);
1134
1135                         /*
1136                          * Shut up static checker
1137                          */
1138                         if (f->fd != -1)
1139                                 close(f->fd);
1140
1141                         f->fd = -1;
1142                         if (err)
1143                                 break;
1144                 }
1145                 temp_stall_ts = 0;
1146         }
1147
1148         if (err)
1149                 goto err_out;
1150
1151         if (!o->zone_size)
1152                 o->zone_size = o->size;
1153
1154         /*
1155          * iolog already set the total io size, if we read back
1156          * stored entries.
1157          */
1158         if (!o->read_iolog_file) {
1159                 if (o->io_size)
1160                         td->total_io_size = o->io_size * o->loops;
1161                 else
1162                         td->total_io_size = o->size * o->loops;
1163         }
1164
1165 done:
1166         if (o->create_only)
1167                 td->done = 1;
1168
1169         td_restore_runstate(td, old_state);
1170         return 0;
1171 err_offset:
1172         log_err("%s: you need to specify valid offset=\n", o->name);
1173 err_out:
1174         td_restore_runstate(td, old_state);
1175         return 1;
1176 }
1177
1178 bool pre_read_files(struct thread_data *td)
1179 {
1180         struct fio_file *f;
1181         unsigned int i;
1182
1183         dprint(FD_FILE, "pre_read files\n");
1184
1185         for_each_file(td, f, i) {
1186                 if (!pre_read_file(td, f))
1187                         return false;
1188         }
1189
1190         return true;
1191 }
1192
1193 static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1194 {
1195         unsigned int range_size, seed;
1196         unsigned long nranges;
1197         uint64_t fsize;
1198
1199         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1200         fsize = min(f->real_file_size, f->io_size);
1201
1202         nranges = (fsize + range_size - 1) / range_size;
1203
1204         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1205         if (!td->o.rand_repeatable)
1206                 seed = td->rand_seeds[4];
1207
1208         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1209                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1210         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1211                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1212         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1213                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1214 }
1215
1216 static bool init_rand_distribution(struct thread_data *td)
1217 {
1218         struct fio_file *f;
1219         unsigned int i;
1220         int state;
1221
1222         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1223                 return false;
1224
1225         state = td_bump_runstate(td, TD_SETTING_UP);
1226
1227         for_each_file(td, f, i)
1228                 __init_rand_distribution(td, f);
1229
1230         td_restore_runstate(td, state);
1231         return true;
1232 }
1233
1234 /*
1235  * Check if the number of blocks exceeds the randomness capability of
1236  * the selected generator. Tausworthe is 32-bit, the others are fullly
1237  * 64-bit capable.
1238  */
1239 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1240                                  uint64_t blocks)
1241 {
1242         if (blocks <= FRAND32_MAX)
1243                 return 0;
1244         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1245                 return 0;
1246
1247         /*
1248          * If the user hasn't specified a random generator, switch
1249          * to tausworthe64 with informational warning. If the user did
1250          * specify one, just warn.
1251          */
1252         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1253                         f->file_name);
1254
1255         if (!fio_option_is_set(&td->o, random_generator)) {
1256                 log_info("fio: Switching to tausworthe64. Use the "
1257                          "random_generator= option to get rid of this "
1258                          "warning.\n");
1259                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1260                 return 0;
1261         }
1262
1263         /*
1264          * Just make this information to avoid breaking scripts.
1265          */
1266         log_info("fio: Use the random_generator= option to switch to lfsr or "
1267                          "tausworthe64.\n");
1268         return 0;
1269 }
1270
1271 bool init_random_map(struct thread_data *td)
1272 {
1273         unsigned long long blocks;
1274         struct fio_file *f;
1275         unsigned int i;
1276
1277         if (init_rand_distribution(td))
1278                 return true;
1279         if (!td_random(td))
1280                 return true;
1281
1282         for_each_file(td, f, i) {
1283                 uint64_t fsize = min(f->real_file_size, f->io_size);
1284
1285                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1286
1287                 if (check_rand_gen_limits(td, f, blocks))
1288                         return false;
1289
1290                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1291                         unsigned long seed;
1292
1293                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1294
1295                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1296                                 fio_file_set_lfsr(f);
1297                                 continue;
1298                         }
1299                 } else if (!td->o.norandommap) {
1300                         f->io_axmap = axmap_new(blocks);
1301                         if (f->io_axmap) {
1302                                 fio_file_set_axmap(f);
1303                                 continue;
1304                         }
1305                 } else if (td->o.norandommap)
1306                         continue;
1307
1308                 if (!td->o.softrandommap) {
1309                         log_err("fio: failed allocating random map. If running"
1310                                 " a large number of jobs, try the 'norandommap'"
1311                                 " option or set 'softrandommap'. Or give"
1312                                 " a larger --alloc-size to fio.\n");
1313                         return false;
1314                 }
1315
1316                 log_info("fio: file %s failed allocating random map. Running "
1317                          "job without.\n", f->file_name);
1318         }
1319
1320         return true;
1321 }
1322
1323 void close_files(struct thread_data *td)
1324 {
1325         struct fio_file *f;
1326         unsigned int i;
1327
1328         for_each_file(td, f, i) {
1329                 if (fio_file_open(f))
1330                         td_io_close_file(td, f);
1331         }
1332 }
1333
1334 void close_and_free_files(struct thread_data *td)
1335 {
1336         struct fio_file *f;
1337         unsigned int i;
1338         bool use_free = td_ioengine_flagged(td, FIO_NOFILEHASH);
1339
1340         dprint(FD_FILE, "close files\n");
1341
1342         for_each_file(td, f, i) {
1343                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1344                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1345                         td_io_unlink_file(td, f);
1346                 }
1347
1348                 if (fio_file_open(f))
1349                         td_io_close_file(td, f);
1350
1351                 remove_file_hash(f);
1352
1353                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1354                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1355                         td_io_unlink_file(td, f);
1356                 }
1357
1358                 if (use_free)
1359                         free(f->file_name);
1360                 else
1361                         sfree(f->file_name);
1362                 f->file_name = NULL;
1363                 if (fio_file_axmap(f)) {
1364                         axmap_free(f->io_axmap);
1365                         f->io_axmap = NULL;
1366                 }
1367                 if (use_free)
1368                         free(f);
1369                 else
1370                         sfree(f);
1371         }
1372
1373         td->o.filename = NULL;
1374         free(td->files);
1375         free(td->file_locks);
1376         td->files_index = 0;
1377         td->files = NULL;
1378         td->file_locks = NULL;
1379         td->o.file_lock_mode = FILE_LOCK_NONE;
1380         td->o.nr_files = 0;
1381 }
1382
1383 static void get_file_type(struct fio_file *f)
1384 {
1385         struct stat sb;
1386
1387         if (!strcmp(f->file_name, "-"))
1388                 f->filetype = FIO_TYPE_PIPE;
1389         else
1390                 f->filetype = FIO_TYPE_FILE;
1391
1392 #ifdef WIN32
1393         /* \\.\ is the device namespace in Windows, where every file is
1394          * a block device */
1395         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1396                 f->filetype = FIO_TYPE_BLOCK;
1397 #endif
1398
1399         if (!stat(f->file_name, &sb)) {
1400                 if (S_ISBLK(sb.st_mode))
1401                         f->filetype = FIO_TYPE_BLOCK;
1402                 else if (S_ISCHR(sb.st_mode))
1403                         f->filetype = FIO_TYPE_CHAR;
1404                 else if (S_ISFIFO(sb.st_mode))
1405                         f->filetype = FIO_TYPE_PIPE;
1406         }
1407 }
1408
1409 static bool __is_already_allocated(const char *fname, bool set)
1410 {
1411         struct flist_head *entry;
1412         bool ret;
1413
1414         ret = file_bloom_exists(fname, set);
1415         if (!ret)
1416                 return ret;
1417
1418         flist_for_each(entry, &filename_list) {
1419                 struct file_name *fn;
1420
1421                 fn = flist_entry(entry, struct file_name, list);
1422
1423                 if (!strcmp(fn->filename, fname))
1424                         return true;
1425         }
1426
1427         return false;
1428 }
1429
1430 static bool is_already_allocated(const char *fname)
1431 {
1432         bool ret;
1433
1434         fio_file_hash_lock();
1435         ret = __is_already_allocated(fname, false);
1436         fio_file_hash_unlock();
1437
1438         return ret;
1439 }
1440
1441 static void set_already_allocated(const char *fname)
1442 {
1443         struct file_name *fn;
1444
1445         fn = malloc(sizeof(struct file_name));
1446         fn->filename = strdup(fname);
1447
1448         fio_file_hash_lock();
1449         if (!__is_already_allocated(fname, true)) {
1450                 flist_add_tail(&fn->list, &filename_list);
1451                 fn = NULL;
1452         }
1453         fio_file_hash_unlock();
1454
1455         if (fn) {
1456                 free(fn->filename);
1457                 free(fn);
1458         }
1459 }
1460
1461 static void free_already_allocated(void)
1462 {
1463         struct flist_head *entry, *tmp;
1464         struct file_name *fn;
1465
1466         if (flist_empty(&filename_list))
1467                 return;
1468
1469         fio_file_hash_lock();
1470         flist_for_each_safe(entry, tmp, &filename_list) {
1471                 fn = flist_entry(entry, struct file_name, list);
1472                 free(fn->filename);
1473                 flist_del(&fn->list);
1474                 free(fn);
1475         }
1476
1477         fio_file_hash_unlock();
1478 }
1479
1480 static struct fio_file *alloc_new_file(struct thread_data *td)
1481 {
1482         struct fio_file *f;
1483
1484         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1485                 f = calloc(1, sizeof(*f));
1486         else
1487                 f = smalloc(sizeof(*f));
1488         if (!f) {
1489                 assert(0);
1490                 return NULL;
1491         }
1492
1493         f->fd = -1;
1494         f->shadow_fd = -1;
1495         fio_file_reset(td, f);
1496         return f;
1497 }
1498
1499 bool exists_and_not_regfile(const char *filename)
1500 {
1501         struct stat sb;
1502
1503         if (lstat(filename, &sb) == -1)
1504                 return false;
1505
1506 #ifndef WIN32 /* NOT Windows */
1507         if (S_ISREG(sb.st_mode))
1508                 return false;
1509 #else
1510         /* \\.\ is the device namespace in Windows, where every file
1511          * is a device node */
1512         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1513                 return false;
1514 #endif
1515
1516         return true;
1517 }
1518
1519 static bool create_work_dirs(struct thread_data *td, const char *fname)
1520 {
1521         char path[PATH_MAX];
1522         char *start, *end;
1523
1524         if (td->o.directory) {
1525                 snprintf(path, PATH_MAX, "%s%c%s", td->o.directory,
1526                          FIO_OS_PATH_SEPARATOR, fname);
1527                 start = strstr(path, fname);
1528         } else {
1529                 snprintf(path, PATH_MAX, "%s", fname);
1530                 start = path;
1531         }
1532
1533         end = start;
1534         while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
1535                 if (end == start)
1536                         break;
1537                 *end = '\0';
1538                 errno = 0;
1539 #ifdef CONFIG_HAVE_MKDIR_TWO
1540                 if (mkdir(path, 0600) && errno != EEXIST) {
1541 #else
1542                 if (mkdir(path) && errno != EEXIST) {
1543 #endif
1544                         log_err("fio: failed to create dir (%s): %d\n",
1545                                 start, errno);
1546                         return false;
1547                 }
1548                 *end = FIO_OS_PATH_SEPARATOR;
1549                 end++;
1550         }
1551         td->flags |= TD_F_DIRS_CREATED;
1552         return true;
1553 }
1554
1555 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1556 {
1557         int cur_files = td->files_index;
1558         char file_name[PATH_MAX];
1559         struct fio_file *f;
1560         int len = 0;
1561
1562         dprint(FD_FILE, "add file %s\n", fname);
1563
1564         if (td->o.directory)
1565                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1566                                         td->o.unique_filename);
1567
1568         sprintf(file_name + len, "%s", fname);
1569
1570         if (strchr(fname, FIO_OS_PATH_SEPARATOR) &&
1571             !(td->flags & TD_F_DIRS_CREATED) &&
1572             !create_work_dirs(td, fname))
1573                 return 1;
1574
1575         /* clean cloned siblings using existing files */
1576         if (numjob && is_already_allocated(file_name) &&
1577             !exists_and_not_regfile(fname))
1578                 return 0;
1579
1580         f = alloc_new_file(td);
1581
1582         if (td->files_size <= td->files_index) {
1583                 unsigned int new_size = td->o.nr_files + 1;
1584
1585                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1586
1587                 td->files = realloc(td->files, new_size * sizeof(f));
1588                 if (td->files == NULL) {
1589                         log_err("fio: realloc OOM\n");
1590                         assert(0);
1591                 }
1592                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1593                         td->file_locks = realloc(td->file_locks, new_size);
1594                         if (!td->file_locks) {
1595                                 log_err("fio: realloc OOM\n");
1596                                 assert(0);
1597                         }
1598                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1599                 }
1600                 td->files_size = new_size;
1601         }
1602         td->files[cur_files] = f;
1603         f->fileno = cur_files;
1604
1605         /*
1606          * init function, io engine may not be loaded yet
1607          */
1608         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1609                 f->real_file_size = -1ULL;
1610
1611         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1612                 f->file_name = strdup(file_name);
1613         else
1614                 f->file_name = smalloc_strdup(file_name);
1615         if (!f->file_name)
1616                 assert(0);
1617
1618         get_file_type(f);
1619
1620         switch (td->o.file_lock_mode) {
1621         case FILE_LOCK_NONE:
1622                 break;
1623         case FILE_LOCK_READWRITE:
1624                 f->rwlock = fio_rwlock_init();
1625                 break;
1626         case FILE_LOCK_EXCLUSIVE:
1627                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1628                 break;
1629         default:
1630                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1631                 assert(0);
1632         }
1633
1634         td->files_index++;
1635         if (f->filetype == FIO_TYPE_FILE)
1636                 td->nr_normal_files++;
1637
1638         if (td->o.numjobs > 1)
1639                 set_already_allocated(file_name);
1640
1641         if (inc)
1642                 td->o.nr_files++;
1643
1644         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1645                                                         cur_files);
1646
1647         return cur_files;
1648 }
1649
1650 int add_file_exclusive(struct thread_data *td, const char *fname)
1651 {
1652         struct fio_file *f;
1653         unsigned int i;
1654
1655         for_each_file(td, f, i) {
1656                 if (!strcmp(f->file_name, fname))
1657                         return i;
1658         }
1659
1660         return add_file(td, fname, 0, 1);
1661 }
1662
1663 void get_file(struct fio_file *f)
1664 {
1665         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1666         assert(fio_file_open(f));
1667         f->references++;
1668 }
1669
1670 int put_file(struct thread_data *td, struct fio_file *f)
1671 {
1672         int f_ret = 0, ret = 0;
1673
1674         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1675
1676         if (!fio_file_open(f)) {
1677                 assert(f->fd == -1);
1678                 return 0;
1679         }
1680
1681         assert(f->references);
1682         if (--f->references)
1683                 return 0;
1684
1685         if (should_fsync(td) && td->o.fsync_on_close) {
1686                 f_ret = fsync(f->fd);
1687                 if (f_ret < 0)
1688                         f_ret = errno;
1689         }
1690
1691         if (td->io_ops->close_file)
1692                 ret = td->io_ops->close_file(td, f);
1693
1694         if (!ret)
1695                 ret = f_ret;
1696
1697         td->nr_open_files--;
1698         fio_file_clear_open(f);
1699         assert(f->fd == -1);
1700         return ret;
1701 }
1702
1703 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1704 {
1705         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1706                 return;
1707
1708         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1709                 if (ddir == DDIR_READ)
1710                         fio_rwlock_read(f->rwlock);
1711                 else
1712                         fio_rwlock_write(f->rwlock);
1713         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1714                 fio_mutex_down(f->lock);
1715
1716         td->file_locks[f->fileno] = td->o.file_lock_mode;
1717 }
1718
1719 void unlock_file(struct thread_data *td, struct fio_file *f)
1720 {
1721         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1722                 return;
1723
1724         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1725                 fio_rwlock_unlock(f->rwlock);
1726         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1727                 fio_mutex_up(f->lock);
1728
1729         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1730 }
1731
1732 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1733 {
1734         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1735                 return;
1736         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1737                 unlock_file(td, f);
1738 }
1739
1740 static int recurse_dir(struct thread_data *td, const char *dirname)
1741 {
1742         struct dirent *dir;
1743         int ret = 0;
1744         DIR *D;
1745
1746         D = opendir(dirname);
1747         if (!D) {
1748                 char buf[FIO_VERROR_SIZE];
1749
1750                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1751                 td_verror(td, errno, buf);
1752                 return 1;
1753         }
1754
1755         while ((dir = readdir(D)) != NULL) {
1756                 char full_path[PATH_MAX];
1757                 struct stat sb;
1758
1759                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1760                         continue;
1761
1762                 sprintf(full_path, "%s%c%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1763
1764                 if (lstat(full_path, &sb) == -1) {
1765                         if (errno != ENOENT) {
1766                                 td_verror(td, errno, "stat");
1767                                 ret = 1;
1768                                 break;
1769                         }
1770                 }
1771
1772                 if (S_ISREG(sb.st_mode)) {
1773                         add_file(td, full_path, 0, 1);
1774                         continue;
1775                 }
1776                 if (!S_ISDIR(sb.st_mode))
1777                         continue;
1778
1779                 ret = recurse_dir(td, full_path);
1780                 if (ret)
1781                         break;
1782         }
1783
1784         closedir(D);
1785         return ret;
1786 }
1787
1788 int add_dir_files(struct thread_data *td, const char *path)
1789 {
1790         int ret = recurse_dir(td, path);
1791
1792         if (!ret)
1793                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1794
1795         return ret;
1796 }
1797
1798 void dup_files(struct thread_data *td, struct thread_data *org)
1799 {
1800         struct fio_file *f;
1801         unsigned int i;
1802
1803         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1804
1805         if (!org->files)
1806                 return;
1807
1808         td->files = malloc(org->files_index * sizeof(f));
1809
1810         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1811                 td->file_locks = malloc(org->files_index);
1812
1813         for_each_file(org, f, i) {
1814                 struct fio_file *__f;
1815
1816                 __f = alloc_new_file(td);
1817
1818                 if (f->file_name) {
1819                         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1820                                 __f->file_name = strdup(f->file_name);
1821                         else
1822                                 __f->file_name = smalloc_strdup(f->file_name);
1823                         if (!__f->file_name)
1824                                 assert(0);
1825
1826                         __f->filetype = f->filetype;
1827                 }
1828
1829                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1830                         __f->lock = f->lock;
1831                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1832                         __f->rwlock = f->rwlock;
1833
1834                 td->files[i] = __f;
1835         }
1836 }
1837
1838 /*
1839  * Returns the index that matches the filename, or -1 if not there
1840  */
1841 int get_fileno(struct thread_data *td, const char *fname)
1842 {
1843         struct fio_file *f;
1844         unsigned int i;
1845
1846         for_each_file(td, f, i)
1847                 if (!strcmp(f->file_name, fname))
1848                         return i;
1849
1850         return -1;
1851 }
1852
1853 /*
1854  * For log usage, where we add/open/close files automatically
1855  */
1856 void free_release_files(struct thread_data *td)
1857 {
1858         close_files(td);
1859         td->o.nr_files = 0;
1860         td->o.open_files = 0;
1861         td->files_index = 0;
1862         td->nr_normal_files = 0;
1863 }
1864
1865 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1866 {
1867         int i;
1868
1869         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1870                 f->last_pos[i] = f->file_offset;
1871                 f->last_start[i] = -1ULL;
1872         }
1873
1874         if (fio_file_axmap(f))
1875                 axmap_reset(f->io_axmap);
1876         else if (fio_file_lfsr(f))
1877                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1878 }
1879
1880 bool fio_files_done(struct thread_data *td)
1881 {
1882         struct fio_file *f;
1883         unsigned int i;
1884
1885         for_each_file(td, f, i)
1886                 if (!fio_file_done(f))
1887                         return false;
1888
1889         return true;
1890 }
1891
1892 /* free memory used in initialization phase only */
1893 void filesetup_mem_free(void)
1894 {
1895         free_already_allocated();
1896 }
1897
1898 /*
1899  * This function is for platforms which support direct I/O but not O_DIRECT.
1900  */
1901 int fio_set_directio(struct thread_data *td, struct fio_file *f)
1902 {
1903 #ifdef FIO_OS_DIRECTIO
1904         int ret = fio_set_odirect(f);
1905
1906         if (ret) {
1907                 td_verror(td, ret, "fio_set_directio");
1908 #if defined(__sun__)
1909                 if (ret == ENOTTY) { /* ENOTTY suggests RAW device or ZFS */
1910                         log_err("fio: doing directIO to RAW devices or ZFS not supported\n");
1911                 } else {
1912                         log_err("fio: the file system does not seem to support direct IO\n");
1913                 }
1914 #else
1915                 log_err("fio: the file system does not seem to support direct IO\n");
1916 #endif
1917                 return -1;
1918         }
1919
1920         return 0;
1921 #else
1922         log_err("fio: direct IO is not supported on this host operating system\n");
1923         return -1;
1924 #endif
1925 }