76b3f9359bad79b44b21d17a8edb74f869b15b7a
[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 #include "zbd.h"
18
19 #ifdef CONFIG_LINUX_FALLOCATE
20 #include <linux/falloc.h>
21 #endif
22
23 static FLIST_HEAD(filename_list);
24
25 /*
26  * List entry for filename_list
27  */
28 struct file_name {
29         struct flist_head list;
30         char *filename;
31 };
32
33 static inline void clear_error(struct thread_data *td)
34 {
35         td->error = 0;
36         td->verror[0] = '\0';
37 }
38
39 static int native_fallocate(struct thread_data *td, struct fio_file *f)
40 {
41         bool success;
42
43         success = fio_fallocate(f, 0, f->real_file_size);
44         dprint(FD_FILE, "native fallocate of file %s size %llu was "
45                         "%ssuccessful\n", f->file_name,
46                         (unsigned long long) f->real_file_size,
47                         !success ? "un": "");
48
49         if (success)
50                 return false;
51
52         if (errno == ENOSYS)
53                 dprint(FD_FILE, "native fallocate is not implemented\n");
54
55         return true;
56 }
57
58 static void fallocate_file(struct thread_data *td, struct fio_file *f)
59 {
60         if (td->o.fill_device)
61                 return;
62
63         switch (td->o.fallocate_mode) {
64         case FIO_FALLOCATE_NATIVE:
65                 native_fallocate(td, f);
66                 break;
67         case FIO_FALLOCATE_NONE:
68                 break;
69 #ifdef CONFIG_POSIX_FALLOCATE
70         case FIO_FALLOCATE_POSIX: {
71                 int r;
72
73                 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
74                                  f->file_name,
75                                  (unsigned long long) f->real_file_size);
76
77                 r = posix_fallocate(f->fd, 0, f->real_file_size);
78                 if (r > 0)
79                         log_err("fio: posix_fallocate fails: %s\n", strerror(r));
80                 break;
81                 }
82 #endif /* CONFIG_POSIX_FALLOCATE */
83 #ifdef CONFIG_LINUX_FALLOCATE
84         case FIO_FALLOCATE_KEEP_SIZE: {
85                 int r;
86
87                 dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
88                                 "file %s size %llu\n", f->file_name,
89                                 (unsigned long long) f->real_file_size);
90
91                 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
92                 if (r != 0)
93                         td_verror(td, errno, "fallocate");
94
95                 break;
96                 }
97 #endif /* CONFIG_LINUX_FALLOCATE */
98         case FIO_FALLOCATE_TRUNCATE: {
99                 int r;
100
101                 dprint(FD_FILE, "ftruncate file %s size %llu\n",
102                                 f->file_name,
103                                 (unsigned long long) f->real_file_size);
104                 r = ftruncate(f->fd, f->real_file_size);
105                 if (r != 0)
106                         td_verror(td, errno, "ftruncate");
107
108                 break;
109         }
110         default:
111                 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
112                 assert(0);
113         }
114 }
115
116 /*
117  * Leaves f->fd open on success, caller must close
118  */
119 static int extend_file(struct thread_data *td, struct fio_file *f)
120 {
121         int new_layout = 0, unlink_file = 0, flags;
122         unsigned long long left;
123         unsigned long long bs;
124         char *b = NULL;
125
126         if (read_only) {
127                 log_err("fio: refusing extend of file due to read-only\n");
128                 return 0;
129         }
130
131         /*
132          * check if we need to lay the file out complete again. fio
133          * does that for operations involving reads, or for writes
134          * where overwrite is set
135          */
136         if (td_read(td) ||
137            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
138             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
139                 new_layout = 1;
140         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
141                 unlink_file = 1;
142
143         if (unlink_file || new_layout) {
144                 int ret;
145
146                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
147
148                 ret = td_io_unlink_file(td, f);
149                 if (ret != 0 && ret != ENOENT) {
150                         td_verror(td, errno, "unlink");
151                         return 1;
152                 }
153         }
154
155         flags = O_WRONLY;
156         if (td->o.allow_create)
157                 flags |= O_CREAT;
158         if (new_layout)
159                 flags |= O_TRUNC;
160
161 #ifdef WIN32
162         flags |= _O_BINARY;
163 #endif
164
165         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
166         f->fd = open(f->file_name, flags, 0644);
167         if (f->fd < 0) {
168                 int err = errno;
169
170                 if (err == ENOENT && !td->o.allow_create)
171                         log_err("fio: file creation disallowed by "
172                                         "allow_file_create=0\n");
173                 else
174                         td_verror(td, err, "open");
175                 return 1;
176         }
177
178         fallocate_file(td, f);
179
180         /*
181          * If our jobs don't require regular files initially, we're done.
182          */
183         if (!new_layout)
184                 goto done;
185
186         /*
187          * The size will be -1ULL when fill_device is used, so don't truncate
188          * or fallocate this file, just write it
189          */
190         if (!td->o.fill_device) {
191                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
192                                         (unsigned long long) f->real_file_size);
193                 if (ftruncate(f->fd, f->real_file_size) == -1) {
194                         if (errno != EFBIG) {
195                                 td_verror(td, errno, "ftruncate");
196                                 goto err;
197                         }
198                 }
199         }
200
201         left = f->real_file_size;
202         bs = td->o.max_bs[DDIR_WRITE];
203         if (bs > left)
204                 bs = left;
205
206         b = malloc(bs);
207         if (!b) {
208                 td_verror(td, errno, "malloc");
209                 goto err;
210         }
211
212         while (left && !td->terminate) {
213                 ssize_t r;
214
215                 if (bs > left)
216                         bs = left;
217
218                 fill_io_buffer(td, b, bs, bs);
219
220                 r = write(f->fd, b, bs);
221
222                 if (r > 0) {
223                         left -= r;
224                         continue;
225                 } else {
226                         if (r < 0) {
227                                 int __e = errno;
228
229                                 if (__e == ENOSPC) {
230                                         if (td->o.fill_device)
231                                                 break;
232                                         log_info("fio: ENOSPC on laying out "
233                                                  "file, stopping\n");
234                                 }
235                                 td_verror(td, errno, "write");
236                         } else
237                                 td_verror(td, EIO, "write");
238
239                         goto err;
240                 }
241         }
242
243         if (td->terminate) {
244                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
245                 td_io_unlink_file(td, f);
246         } else if (td->o.create_fsync) {
247                 if (fsync(f->fd) < 0) {
248                         td_verror(td, errno, "fsync");
249                         goto err;
250                 }
251         }
252         if (td->o.fill_device && !td_write(td)) {
253                 fio_file_clear_size_known(f);
254                 if (td_io_get_file_size(td, f))
255                         goto err;
256                 if (f->io_size > f->real_file_size)
257                         f->io_size = f->real_file_size;
258         }
259
260         free(b);
261 done:
262         return 0;
263 err:
264         close(f->fd);
265         f->fd = -1;
266         if (b)
267                 free(b);
268         return 1;
269 }
270
271 static bool pre_read_file(struct thread_data *td, struct fio_file *f)
272 {
273         int r, did_open = 0, old_runstate;
274         unsigned long long left;
275         unsigned long long bs;
276         bool ret = true;
277         char *b;
278
279         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
280             td_ioengine_flagged(td, FIO_NOIO))
281                 return true;
282
283         if (f->filetype == FIO_TYPE_CHAR)
284                 return true;
285
286         if (!fio_file_open(f)) {
287                 if (td->io_ops->open_file(td, f)) {
288                         log_err("fio: cannot pre-read, failed to open file\n");
289                         return false;
290                 }
291                 did_open = 1;
292         }
293
294         old_runstate = td_bump_runstate(td, TD_PRE_READING);
295
296         left = f->io_size;
297         bs = td->o.max_bs[DDIR_READ];
298         if (bs > left)
299                 bs = left;
300
301         b = malloc(bs);
302         if (!b) {
303                 td_verror(td, errno, "malloc");
304                 ret = false;
305                 goto error;
306         }
307         memset(b, 0, bs);
308
309         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
310                 td_verror(td, errno, "lseek");
311                 log_err("fio: failed to lseek pre-read file\n");
312                 ret = false;
313                 goto error;
314         }
315
316         while (left && !td->terminate) {
317                 if (bs > left)
318                         bs = left;
319
320                 r = read(f->fd, b, bs);
321
322                 if (r == (int) bs) {
323                         left -= bs;
324                         continue;
325                 } else {
326                         td_verror(td, EIO, "pre_read");
327                         break;
328                 }
329         }
330
331 error:
332         td_restore_runstate(td, old_runstate);
333
334         if (did_open)
335                 td->io_ops->close_file(td, f);
336
337         free(b);
338         return ret;
339 }
340
341 unsigned long long get_rand_file_size(struct thread_data *td)
342 {
343         unsigned long long ret, sized;
344         uint64_t frand_max;
345         uint64_t r;
346
347         frand_max = rand_max(&td->file_size_state);
348         r = __rand(&td->file_size_state);
349         sized = td->o.file_size_high - td->o.file_size_low;
350         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
351         ret += td->o.file_size_low;
352         ret -= (ret % td->o.rw_min_bs);
353         return ret;
354 }
355
356 static int file_size(struct thread_data *td, struct fio_file *f)
357 {
358         struct stat st;
359
360         if (stat(f->file_name, &st) == -1) {
361                 td_verror(td, errno, "fstat");
362                 return 1;
363         }
364
365         f->real_file_size = st.st_size;
366         return 0;
367 }
368
369 static int bdev_size(struct thread_data *td, struct fio_file *f)
370 {
371         unsigned long long bytes = 0;
372         int r;
373
374         if (td->io_ops->open_file(td, f)) {
375                 log_err("fio: failed opening blockdev %s for size check\n",
376                         f->file_name);
377                 return 1;
378         }
379
380         r = blockdev_size(f, &bytes);
381         if (r) {
382                 td_verror(td, r, "blockdev_size");
383                 goto err;
384         }
385
386         if (!bytes) {
387                 log_err("%s: zero sized block device?\n", f->file_name);
388                 goto err;
389         }
390
391         f->real_file_size = bytes;
392         td->io_ops->close_file(td, f);
393         return 0;
394 err:
395         td->io_ops->close_file(td, f);
396         return 1;
397 }
398
399 static int char_size(struct thread_data *td, struct fio_file *f)
400 {
401 #ifdef FIO_HAVE_CHARDEV_SIZE
402         unsigned long long bytes = 0;
403         int r;
404
405         if (td->io_ops->open_file(td, f)) {
406                 log_err("fio: failed opening chardev %s for size check\n",
407                         f->file_name);
408                 return 1;
409         }
410
411         r = chardev_size(f, &bytes);
412         if (r) {
413                 td_verror(td, r, "chardev_size");
414                 goto err;
415         }
416
417         if (!bytes) {
418                 log_err("%s: zero sized char device?\n", f->file_name);
419                 goto err;
420         }
421
422         f->real_file_size = bytes;
423         td->io_ops->close_file(td, f);
424         return 0;
425 err:
426         td->io_ops->close_file(td, f);
427         return 1;
428 #else
429         f->real_file_size = -1ULL;
430         return 0;
431 #endif
432 }
433
434 static int get_file_size(struct thread_data *td, struct fio_file *f)
435 {
436         int ret = 0;
437
438         if (fio_file_size_known(f))
439                 return 0;
440
441         if (f->filetype == FIO_TYPE_FILE)
442                 ret = file_size(td, f);
443         else if (f->filetype == FIO_TYPE_BLOCK)
444                 ret = bdev_size(td, f);
445         else if (f->filetype == FIO_TYPE_CHAR)
446                 ret = char_size(td, f);
447         else {
448                 f->real_file_size = -1;
449                 log_info("%s: failed to get file size of %s\n", td->o.name,
450                                         f->file_name);
451                 return 1; /* avoid offset extends end error message */
452         }
453
454         /*
455          * Leave ->real_file_size with 0 since it could be expectation
456          * of initial setup for regular files.
457          */
458         if (ret)
459                 return ret;
460
461         /*
462          * ->file_offset normally hasn't been initialized yet, so this
463          * is basically always false unless ->real_file_size is -1, but
464          * if ->real_file_size is -1 this message doesn't make sense.
465          * As a result, this message is basically useless.
466          */
467         if (f->file_offset > f->real_file_size) {
468                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
469                                         (unsigned long long) f->file_offset,
470                                         (unsigned long long) f->real_file_size);
471                 return 1;
472         }
473
474         fio_file_set_size_known(f);
475         return 0;
476 }
477
478 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
479                                    unsigned long long off,
480                                    unsigned long long len)
481 {
482         int errval = 0, ret = 0;
483
484 #ifdef CONFIG_ESX
485         return 0;
486 #endif
487
488         if (len == -1ULL)
489                 len = f->io_size;
490         if (off == -1ULL)
491                 off = f->file_offset;
492
493         if (len == -1ULL || off == -1ULL)
494                 return 0;
495
496         if (td->io_ops->invalidate) {
497                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
498                         f->file_name);
499                 ret = td->io_ops->invalidate(td, f);
500                 if (ret < 0)
501                         errval = -ret;
502         } else if (td_ioengine_flagged(td, FIO_DISKLESSIO)) {
503                 dprint(FD_IO, "invalidate not supported by ioengine %s\n",
504                        td->io_ops->name);
505         } else if (f->filetype == FIO_TYPE_FILE) {
506                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
507                         f->file_name, off, len);
508                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
509                 if (ret)
510                         errval = ret;
511         } else if (f->filetype == FIO_TYPE_BLOCK) {
512                 int retry_count = 0;
513
514                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
515                 ret = blockdev_invalidate_cache(f);
516                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
517                         /*
518                          * Linux multipath devices reject ioctl while
519                          * the maps are being updated. That window can
520                          * last tens of milliseconds; we'll try up to
521                          * a quarter of a second.
522                          */
523                         usleep(10000);
524                         ret = blockdev_invalidate_cache(f);
525                 }
526                 if (ret < 0 && errno == EACCES && geteuid()) {
527                         if (!fio_did_warn(FIO_WARN_ROOT_FLUSH)) {
528                                 log_err("fio: only root may flush block "
529                                         "devices. Cache flush bypassed!\n");
530                         }
531                 }
532                 if (ret < 0)
533                         errval = errno;
534         } else if (f->filetype == FIO_TYPE_CHAR ||
535                    f->filetype == FIO_TYPE_PIPE) {
536                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
537         }
538
539         /*
540          * Cache flushing isn't a fatal condition, and we know it will
541          * happen on some platforms where we don't have the proper
542          * function to flush eg block device caches. So just warn and
543          * continue on our way.
544          */
545         if (errval)
546                 log_info("fio: cache invalidation of %s failed: %s\n",
547                          f->file_name, strerror(errval));
548
549         return 0;
550
551 }
552
553 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
554 {
555         if (!fio_file_open(f))
556                 return 0;
557
558         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
559 }
560
561 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
562 {
563         int ret = 0;
564
565         dprint(FD_FILE, "fd close %s\n", f->file_name);
566
567         remove_file_hash(f);
568
569         if (close(f->fd) < 0)
570                 ret = errno;
571
572         f->fd = -1;
573
574         if (f->shadow_fd != -1) {
575                 close(f->shadow_fd);
576                 f->shadow_fd = -1;
577         }
578
579         f->engine_pos = 0;
580         return ret;
581 }
582
583 int file_lookup_open(struct fio_file *f, int flags)
584 {
585         struct fio_file *__f;
586         int from_hash;
587
588         __f = lookup_file_hash(f->file_name);
589         if (__f) {
590                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
591                 f->lock = __f->lock;
592                 from_hash = 1;
593         } else {
594                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
595                 from_hash = 0;
596         }
597
598 #ifdef WIN32
599         flags |= _O_BINARY;
600 #endif
601
602         f->fd = open(f->file_name, flags, 0600);
603         return from_hash;
604 }
605
606 static int file_close_shadow_fds(struct thread_data *td)
607 {
608         struct fio_file *f;
609         int num_closed = 0;
610         unsigned int i;
611
612         for_each_file(td, f, i) {
613                 if (f->shadow_fd == -1)
614                         continue;
615
616                 close(f->shadow_fd);
617                 f->shadow_fd = -1;
618                 num_closed++;
619         }
620
621         return num_closed;
622 }
623
624 int generic_open_file(struct thread_data *td, struct fio_file *f)
625 {
626         int is_std = 0;
627         int flags = 0;
628         int from_hash = 0;
629
630         dprint(FD_FILE, "fd open %s\n", f->file_name);
631
632         if (!strcmp(f->file_name, "-")) {
633                 if (td_rw(td)) {
634                         log_err("fio: can't read/write to stdin/out\n");
635                         return 1;
636                 }
637                 is_std = 1;
638
639                 /*
640                  * move output logging to stderr, if we are writing to stdout
641                  */
642                 if (td_write(td))
643                         f_out = stderr;
644         }
645
646         if (td_trim(td))
647                 goto skip_flags;
648         if (td->o.odirect)
649                 flags |= OS_O_DIRECT;
650         if (td->o.oatomic) {
651                 if (!FIO_O_ATOMIC) {
652                         td_verror(td, EINVAL, "OS does not support atomic IO");
653                         return 1;
654                 }
655                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
656         }
657         flags |= td->o.sync_io;
658         if (td->o.create_on_open && td->o.allow_create)
659                 flags |= O_CREAT;
660 skip_flags:
661         if (f->filetype != FIO_TYPE_FILE)
662                 flags |= FIO_O_NOATIME;
663
664 open_again:
665         if (td_write(td)) {
666                 if (!read_only)
667                         flags |= O_RDWR;
668
669                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
670                         flags |= O_CREAT;
671
672                 if (is_std)
673                         f->fd = dup(STDOUT_FILENO);
674                 else
675                         from_hash = file_lookup_open(f, flags);
676         } else if (td_read(td)) {
677                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
678                         flags |= O_RDWR;
679                 else
680                         flags |= O_RDONLY;
681
682                 if (is_std)
683                         f->fd = dup(STDIN_FILENO);
684                 else
685                         from_hash = file_lookup_open(f, flags);
686         } else if (td_trim(td)) {
687                 assert(!td_rw(td)); /* should have matched above */
688                 if (!read_only)
689                         flags |= O_RDWR;
690                 from_hash = file_lookup_open(f, flags);
691         }
692
693         if (f->fd == -1) {
694                 char buf[FIO_VERROR_SIZE];
695                 int __e = errno;
696
697                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
698                         flags &= ~FIO_O_NOATIME;
699                         goto open_again;
700                 }
701                 if (__e == EMFILE && file_close_shadow_fds(td))
702                         goto open_again;
703
704                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
705
706                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
707                         log_err("fio: looks like your file system does not " \
708                                 "support direct=1/buffered=0\n");
709                 }
710
711                 td_verror(td, __e, buf);
712                 return 1;
713         }
714
715         if (!from_hash && f->fd != -1) {
716                 if (add_file_hash(f)) {
717                         int fio_unused ret;
718
719                         /*
720                          * Stash away descriptor for later close. This is to
721                          * work-around a "feature" on Linux, where a close of
722                          * an fd that has been opened for write will trigger
723                          * udev to call blkid to check partitions, fs id, etc.
724                          * That pollutes the device cache, which can slow down
725                          * unbuffered accesses.
726                          */
727                         if (f->shadow_fd == -1)
728                                 f->shadow_fd = f->fd;
729                         else {
730                                 /*
731                                  * OK to ignore, we haven't done anything
732                                  * with it
733                                  */
734                                 ret = generic_close_file(td, f);
735                         }
736                         goto open_again;
737                 }
738         }
739
740         return 0;
741 }
742
743 /*
744  * This function i.e. get_file_size() is the default .get_file_size
745  * implementation of majority of I/O engines.
746  */
747 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
748 {
749         return get_file_size(td, f);
750 }
751
752 /*
753  * open/close all files, so that ->real_file_size gets set
754  */
755 static int get_file_sizes(struct thread_data *td)
756 {
757         struct fio_file *f;
758         unsigned int i;
759         int err = 0;
760
761         for_each_file(td, f, i) {
762                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
763                                                                 f->file_name);
764
765                 if (td_io_get_file_size(td, f)) {
766                         if (td->error != ENOENT) {
767                                 log_err("%s\n", td->verror);
768                                 err = 1;
769                                 break;
770                         }
771                         clear_error(td);
772                 }
773
774                 /*
775                  * There are corner cases where we end up with -1 for
776                  * ->real_file_size due to unsupported file type, etc.
777                  * We then just set to size option value divided by number
778                  * of files, similar to the way file ->io_size is set.
779                  * stat(2) failure doesn't set ->real_file_size to -1.
780                  */
781                 if (f->real_file_size == -1ULL && td->o.size)
782                         f->real_file_size = td->o.size / td->o.nr_files;
783         }
784
785         return err;
786 }
787
788 struct fio_mount {
789         struct flist_head list;
790         const char *base;
791         char __base[256];
792         unsigned int key;
793 };
794
795 /*
796  * Get free number of bytes for each file on each unique mount.
797  */
798 static unsigned long long get_fs_free_counts(struct thread_data *td)
799 {
800         struct flist_head *n, *tmp;
801         unsigned long long ret = 0;
802         struct fio_mount *fm;
803         FLIST_HEAD(list);
804         struct fio_file *f;
805         unsigned int i;
806
807         for_each_file(td, f, i) {
808                 struct stat sb;
809                 char buf[256];
810
811                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
812                         if (f->real_file_size != -1ULL)
813                                 ret += f->real_file_size;
814                         continue;
815                 } else if (f->filetype != FIO_TYPE_FILE)
816                         continue;
817
818                 snprintf(buf, FIO_ARRAY_SIZE(buf), "%s", f->file_name);
819
820                 if (stat(buf, &sb) < 0) {
821                         if (errno != ENOENT)
822                                 break;
823                         strcpy(buf, ".");
824                         if (stat(buf, &sb) < 0)
825                                 break;
826                 }
827
828                 fm = NULL;
829                 flist_for_each(n, &list) {
830                         fm = flist_entry(n, struct fio_mount, list);
831                         if (fm->key == sb.st_dev)
832                                 break;
833
834                         fm = NULL;
835                 }
836
837                 if (fm)
838                         continue;
839
840                 fm = calloc(1, sizeof(*fm));
841                 snprintf(fm->__base, FIO_ARRAY_SIZE(fm->__base), "%s", buf);
842                 fm->base = basename(fm->__base);
843                 fm->key = sb.st_dev;
844                 flist_add(&fm->list, &list);
845         }
846
847         flist_for_each_safe(n, tmp, &list) {
848                 unsigned long long sz;
849
850                 fm = flist_entry(n, struct fio_mount, list);
851                 flist_del(&fm->list);
852
853                 sz = get_fs_free_size(fm->base);
854                 if (sz && sz != -1ULL)
855                         ret += sz;
856
857                 free(fm);
858         }
859
860         return ret;
861 }
862
863 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
864 {
865         bool align = false;
866         struct thread_options *o = &td->o;
867         unsigned long long align_bs;
868         unsigned long long offset;
869         unsigned long long increment;
870
871         if (o->file_append && f->filetype == FIO_TYPE_FILE)
872                 return f->real_file_size;
873
874         if (o->offset_increment_percent) {
875                 assert(!o->offset_increment);
876                 increment = o->offset_increment_percent * f->real_file_size / 100;
877                 align = true;
878         } else
879                 increment = o->offset_increment;
880
881         if (o->start_offset_percent > 0) {
882                 /* calculate the raw offset */
883                 offset = (f->real_file_size * o->start_offset_percent / 100) +
884                         (td->subjob_number * increment);
885
886                 align = true;
887         } else {
888                 /* start_offset_percent not set */
889                 offset = o->start_offset +
890                                 td->subjob_number * increment;
891         }
892
893         if (align) {
894                 /*
895                  * if offset_align is provided, use it
896                  */
897                 if (fio_option_is_set(o, start_offset_align)) {
898                         align_bs = o->start_offset_align;
899                 } else {
900                         /* else take the minimum block size */
901                         align_bs = td_min_bs(td);
902                 }
903
904                 /*
905                  * block align the offset at the next available boundary at
906                  * ceiling(offset / align_bs) * align_bs
907                  */
908                 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
909         }
910
911         return offset;
912 }
913
914 /*
915  * Find longest path component that exists and return its length
916  */
917 int longest_existing_path(char *path) {
918         char buf[PATH_MAX];
919         bool done;
920         char *buf_pos;
921         int offset;
922 #ifdef WIN32
923         DWORD dwAttr;
924 #else
925         struct stat sb;
926 #endif
927
928         sprintf(buf, "%s", path);
929         done = false;
930         while (!done) {
931                 buf_pos = strrchr(buf, FIO_OS_PATH_SEPARATOR);
932                 if (!buf_pos) {
933                         done = true;
934                         offset = 0;
935                         break;
936                 }
937
938                 *(buf_pos + 1) = '\0';
939
940 #ifdef WIN32
941                 dwAttr = GetFileAttributesA(buf);
942                 if (dwAttr != INVALID_FILE_ATTRIBUTES) {
943                         done = true;
944                 }
945 #else
946                 if (stat(buf, &sb) == 0)
947                         done = true;
948 #endif
949                 if (done)
950                         offset = buf_pos - buf;
951                 else
952                         *buf_pos = '\0';
953         }
954
955         return offset;
956 }
957
958 static bool create_work_dirs(struct thread_data *td, const char *fname)
959 {
960         char path[PATH_MAX];
961         char *start, *end;
962         int offset;
963
964         snprintf(path, PATH_MAX, "%s", fname);
965         start = path;
966
967         offset = longest_existing_path(path);
968         end = start + offset;
969         while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
970                 if (end == start) {
971                         end++;
972                         continue;
973                 }
974                 *end = '\0';
975                 errno = 0;
976                 if (fio_mkdir(path, 0700) && errno != EEXIST) {
977                         log_err("fio: failed to create dir (%s): %s\n",
978                                 start, strerror(errno));
979                         return false;
980                 }
981                 *end = FIO_OS_PATH_SEPARATOR;
982                 end++;
983         }
984         td->flags |= TD_F_DIRS_CREATED;
985         return true;
986 }
987
988 /*
989  * Open the files and setup files sizes, creating files if necessary.
990  */
991 int setup_files(struct thread_data *td)
992 {
993         unsigned long long total_size, extend_size;
994         struct thread_options *o = &td->o;
995         struct fio_file *f;
996         unsigned int i, nr_fs_extra = 0;
997         int err = 0, need_extend;
998         int old_state;
999         const unsigned long long bs = td_min_bs(td);
1000         uint64_t fs = 0;
1001
1002         dprint(FD_FILE, "setup files\n");
1003
1004         old_state = td_bump_runstate(td, TD_SETTING_UP);
1005
1006         for_each_file(td, f, i) {
1007                 if (!td_ioengine_flagged(td, FIO_DISKLESSIO) &&
1008                     strchr(f->file_name, FIO_OS_PATH_SEPARATOR) &&
1009                     !(td->flags & TD_F_DIRS_CREATED) &&
1010                     !create_work_dirs(td, f->file_name))
1011                         goto err_out;
1012         }
1013
1014         /*
1015          * Find out physical size of files or devices for this thread,
1016          * before we determine I/O size and range of our targets.
1017          * If ioengine defines a setup() method, it's responsible for
1018          * opening the files and setting f->real_file_size to indicate
1019          * the valid range for that file.
1020          */
1021         if (td->io_ops->setup)
1022                 err = td->io_ops->setup(td);
1023         else
1024                 err = get_file_sizes(td);
1025
1026         if (err)
1027                 goto err_out;
1028
1029         if (o->read_iolog_file)
1030                 goto done;
1031
1032         /*
1033          * check sizes. if the files/devices do not exist and the size
1034          * isn't passed to fio, abort.
1035          */
1036         total_size = 0;
1037         for_each_file(td, f, i) {
1038                 f->fileno = i;
1039                 if (f->real_file_size == -1ULL)
1040                         total_size = -1ULL;
1041                 else
1042                         total_size += f->real_file_size;
1043         }
1044
1045         if (o->fill_device)
1046                 td->fill_device_size = get_fs_free_counts(td);
1047
1048         /*
1049          * device/file sizes are zero and no size given, punt
1050          */
1051         if ((!total_size || total_size == -1ULL) && !o->size &&
1052             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
1053             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
1054                 log_err("%s: you need to specify size=\n", o->name);
1055                 td_verror(td, EINVAL, "total_file_size");
1056                 goto err_out;
1057         }
1058
1059         /*
1060          * Calculate per-file size and potential extra size for the
1061          * first files, if needed (i.e. if we don't have a fixed size).
1062          */
1063         if (!o->file_size_low && o->nr_files) {
1064                 uint64_t all_fs;
1065
1066                 fs = o->size / o->nr_files;
1067                 all_fs = fs * o->nr_files;
1068
1069                 if (all_fs < o->size)
1070                         nr_fs_extra = (o->size - all_fs) / bs;
1071         }
1072
1073         /*
1074          * now file sizes are known, so we can set ->io_size. if size= is
1075          * not given, ->io_size is just equal to ->real_file_size. if size
1076          * is given, ->io_size is size / nr_files.
1077          */
1078         extend_size = total_size = 0;
1079         need_extend = 0;
1080         for_each_file(td, f, i) {
1081                 f->file_offset = get_start_offset(td, f);
1082
1083                 /*
1084                  * Update ->io_size depending on options specified.
1085                  * ->file_size_low being 0 means filesize option isn't set.
1086                  * Non zero ->file_size_low equals ->file_size_high means
1087                  * filesize option is set in a fixed size format.
1088                  * Non zero ->file_size_low not equals ->file_size_high means
1089                  * filesize option is set in a range format.
1090                  */
1091                 if (!o->file_size_low) {
1092                         /*
1093                          * no file size or range given, file size is equal to
1094                          * total size divided by number of files. If the size
1095                          * doesn't divide nicely with the min blocksize,
1096                          * make the first files bigger.
1097                          */
1098                         f->io_size = fs;
1099                         if (nr_fs_extra) {
1100                                 nr_fs_extra--;
1101                                 f->io_size += bs;
1102                         }
1103
1104                         /*
1105                          * We normally don't come here for regular files, but
1106                          * if the result is 0 for a regular file, set it to the
1107                          * real file size. This could be size of the existing
1108                          * one if it already exists, but otherwise will be set
1109                          * to 0. A new file won't be created because
1110                          * ->io_size + ->file_offset equals ->real_file_size.
1111                          */
1112                         if (!f->io_size) {
1113                                 if (f->file_offset > f->real_file_size)
1114                                         goto err_offset;
1115                                 f->io_size = f->real_file_size - f->file_offset;
1116                                 if (!f->io_size)
1117                                         log_info("fio: file %s may be ignored\n",
1118                                                 f->file_name);
1119                         }
1120                 } else if (f->real_file_size < o->file_size_low ||
1121                            f->real_file_size > o->file_size_high) {
1122                         if (f->file_offset > o->file_size_low)
1123                                 goto err_offset;
1124                         /*
1125                          * file size given. if it's fixed, use that. if it's a
1126                          * range, generate a random size in-between.
1127                          */
1128                         if (o->file_size_low == o->file_size_high)
1129                                 f->io_size = o->file_size_low - f->file_offset;
1130                         else {
1131                                 f->io_size = get_rand_file_size(td)
1132                                                 - f->file_offset;
1133                         }
1134                 } else
1135                         f->io_size = f->real_file_size - f->file_offset;
1136
1137                 if (f->io_size == -1ULL)
1138                         total_size = -1ULL;
1139                 else {
1140                         uint64_t io_size;
1141
1142                         if (o->size_percent && o->size_percent != 100) {
1143                                 uint64_t file_size;
1144
1145                                 file_size = f->io_size + f->file_offset;
1146                                 f->io_size = (file_size *
1147                                               o->size_percent) / 100;
1148                                 if (f->io_size > (file_size - f->file_offset))
1149                                         f->io_size = file_size - f->file_offset;
1150
1151                                 f->io_size -= (f->io_size % td_min_bs(td));
1152                         }
1153
1154                         io_size = f->io_size;
1155                         if (o->io_size_percent && o->io_size_percent != 100) {
1156                                 io_size *= o->io_size_percent;
1157                                 io_size /= 100;
1158                         }
1159
1160                         total_size += io_size;
1161                 }
1162
1163                 if (f->filetype == FIO_TYPE_FILE &&
1164                     (f->io_size + f->file_offset) > f->real_file_size) {
1165                         if (!td_ioengine_flagged(td, FIO_DISKLESSIO) &&
1166                             !o->create_on_open) {
1167                                 need_extend++;
1168                                 extend_size += (f->io_size + f->file_offset);
1169                                 fio_file_set_extend(f);
1170                         } else if (!td_ioengine_flagged(td, FIO_DISKLESSIO) ||
1171                                    (td_ioengine_flagged(td, FIO_DISKLESSIO) &&
1172                                     td_ioengine_flagged(td, FIO_FAKEIO)))
1173                                 f->real_file_size = f->io_size + f->file_offset;
1174                 }
1175         }
1176
1177         if (td->o.block_error_hist) {
1178                 int len;
1179
1180                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1181                 f = td->files[0];
1182                 len = f->io_size / td->o.bs[DDIR_TRIM];
1183                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1184                         log_err("fio: cannot calculate block histogram with "
1185                                 "%d trim blocks, maximum %d\n",
1186                                 len, MAX_NR_BLOCK_INFOS);
1187                         td_verror(td, EINVAL, "block_error_hist");
1188                         goto err_out;
1189                 }
1190
1191                 td->ts.nr_block_infos = len;
1192                 for (i = 0; i < len; i++)
1193                         td->ts.block_infos[i] =
1194                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1195         } else
1196                 td->ts.nr_block_infos = 0;
1197
1198         if (!o->size || (total_size && o->size > total_size))
1199                 o->size = total_size;
1200
1201         if (o->size < td_min_bs(td)) {
1202                 log_err("fio: blocksize is larger than data set range\n");
1203                 goto err_out;
1204         }
1205
1206         /*
1207          * See if we need to extend some files, typically needed when our
1208          * target regular files don't exist yet, but our jobs require them
1209          * initially due to read I/Os.
1210          */
1211         if (need_extend) {
1212                 temp_stall_ts = 1;
1213                 if (output_format & FIO_OUTPUT_NORMAL) {
1214                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1215                                  o->name,
1216                                  need_extend > 1 ? "s" : "",
1217                                  need_extend,
1218                                  need_extend > 1 ? "s" : "",
1219                                  need_extend > 1 ? "total " : "",
1220                                  extend_size >> 20);
1221                 }
1222
1223                 for_each_file(td, f, i) {
1224                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1225
1226                         if (!fio_file_extend(f))
1227                                 continue;
1228
1229                         assert(f->filetype == FIO_TYPE_FILE);
1230                         fio_file_clear_extend(f);
1231                         if (!o->fill_device) {
1232                                 old_len = f->real_file_size;
1233                                 extend_len = f->io_size + f->file_offset -
1234                                                 old_len;
1235                         }
1236                         f->real_file_size = (f->io_size + f->file_offset);
1237                         err = extend_file(td, f);
1238                         if (err)
1239                                 break;
1240
1241                         err = __file_invalidate_cache(td, f, old_len,
1242                                                                 extend_len);
1243
1244                         /*
1245                          * Shut up static checker
1246                          */
1247                         if (f->fd != -1)
1248                                 close(f->fd);
1249
1250                         f->fd = -1;
1251                         if (err)
1252                                 break;
1253                 }
1254                 temp_stall_ts = 0;
1255         }
1256
1257         if (err)
1258                 goto err_out;
1259
1260         /*
1261          * iolog already set the total io size, if we read back
1262          * stored entries.
1263          */
1264         if (!o->read_iolog_file) {
1265                 if (o->io_size)
1266                         td->total_io_size = o->io_size * o->loops;
1267                 else
1268                         td->total_io_size = o->size * o->loops;
1269         }
1270
1271 done:
1272         if (o->create_only)
1273                 td->done = 1;
1274
1275         td_restore_runstate(td, old_state);
1276
1277         if (td->o.zone_mode == ZONE_MODE_ZBD) {
1278                 err = zbd_setup_files(td);
1279                 if (err)
1280                         goto err_out;
1281         }
1282         return 0;
1283
1284 err_offset:
1285         log_err("%s: you need to specify valid offset=\n", o->name);
1286 err_out:
1287         td_restore_runstate(td, old_state);
1288         return 1;
1289 }
1290
1291 bool pre_read_files(struct thread_data *td)
1292 {
1293         struct fio_file *f;
1294         unsigned int i;
1295
1296         dprint(FD_FILE, "pre_read files\n");
1297
1298         for_each_file(td, f, i) {
1299                 if (!pre_read_file(td, f))
1300                         return false;
1301         }
1302
1303         return true;
1304 }
1305
1306 static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1307 {
1308         unsigned int range_size, seed;
1309         uint64_t nranges;
1310         uint64_t fsize;
1311
1312         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1313         fsize = min(f->real_file_size, f->io_size);
1314
1315         nranges = (fsize + range_size - 1ULL) / range_size;
1316
1317         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1318         if (!td->o.rand_repeatable)
1319                 seed = td->rand_seeds[4];
1320
1321         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1322                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1323         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1324                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1325         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1326                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1327 }
1328
1329 static bool init_rand_distribution(struct thread_data *td)
1330 {
1331         struct fio_file *f;
1332         unsigned int i;
1333         int state;
1334
1335         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM ||
1336             td->o.random_distribution == FIO_RAND_DIST_ZONED ||
1337             td->o.random_distribution == FIO_RAND_DIST_ZONED_ABS)
1338                 return false;
1339
1340         state = td_bump_runstate(td, TD_SETTING_UP);
1341
1342         for_each_file(td, f, i)
1343                 __init_rand_distribution(td, f);
1344
1345         td_restore_runstate(td, state);
1346         return true;
1347 }
1348
1349 /*
1350  * Check if the number of blocks exceeds the randomness capability of
1351  * the selected generator. Tausworthe is 32-bit, the others are fullly
1352  * 64-bit capable.
1353  */
1354 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1355                                  uint64_t blocks)
1356 {
1357         if (blocks <= FRAND32_MAX)
1358                 return 0;
1359         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1360                 return 0;
1361
1362         /*
1363          * If the user hasn't specified a random generator, switch
1364          * to tausworthe64 with informational warning. If the user did
1365          * specify one, just warn.
1366          */
1367         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1368                         f->file_name);
1369
1370         if (!fio_option_is_set(&td->o, random_generator)) {
1371                 log_info("fio: Switching to tausworthe64. Use the "
1372                          "random_generator= option to get rid of this "
1373                          "warning.\n");
1374                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1375                 return 0;
1376         }
1377
1378         /*
1379          * Just make this information to avoid breaking scripts.
1380          */
1381         log_info("fio: Use the random_generator= option to switch to lfsr or "
1382                          "tausworthe64.\n");
1383         return 0;
1384 }
1385
1386 bool init_random_map(struct thread_data *td)
1387 {
1388         unsigned long long blocks;
1389         struct fio_file *f;
1390         unsigned int i;
1391
1392         if (init_rand_distribution(td))
1393                 return true;
1394         if (!td_random(td))
1395                 return true;
1396
1397         for_each_file(td, f, i) {
1398                 uint64_t fsize = min(f->real_file_size, f->io_size);
1399
1400                 if (td->o.zone_mode == ZONE_MODE_STRIDED)
1401                         fsize = td->o.zone_range;
1402
1403                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1404
1405                 if (check_rand_gen_limits(td, f, blocks))
1406                         return false;
1407
1408                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1409                         uint64_t seed;
1410
1411                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1412
1413                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1414                                 fio_file_set_lfsr(f);
1415                                 continue;
1416                         } else {
1417                                 log_err("fio: failed initializing LFSR\n");
1418                                 return false;
1419                         }
1420                 } else if (!td->o.norandommap) {
1421                         f->io_axmap = axmap_new(blocks);
1422                         if (f->io_axmap) {
1423                                 fio_file_set_axmap(f);
1424                                 continue;
1425                         }
1426                 } else if (td->o.norandommap)
1427                         continue;
1428
1429                 if (!td->o.softrandommap) {
1430                         log_err("fio: failed allocating random map. If running"
1431                                 " a large number of jobs, try the 'norandommap'"
1432                                 " option or set 'softrandommap'. Or give"
1433                                 " a larger --alloc-size to fio.\n");
1434                         return false;
1435                 }
1436
1437                 log_info("fio: file %s failed allocating random map. Running "
1438                          "job without.\n", f->file_name);
1439         }
1440
1441         return true;
1442 }
1443
1444 void close_files(struct thread_data *td)
1445 {
1446         struct fio_file *f;
1447         unsigned int i;
1448
1449         for_each_file(td, f, i) {
1450                 if (fio_file_open(f))
1451                         td_io_close_file(td, f);
1452         }
1453 }
1454
1455 void fio_file_free(struct fio_file *f)
1456 {
1457         if (fio_file_axmap(f))
1458                 axmap_free(f->io_axmap);
1459         if (!fio_file_smalloc(f)) {
1460                 free(f->file_name);
1461                 free(f);
1462         } else {
1463                 sfree(f->file_name);
1464                 sfree(f);
1465         }
1466 }
1467
1468 void close_and_free_files(struct thread_data *td)
1469 {
1470         struct fio_file *f;
1471         unsigned int i;
1472
1473         dprint(FD_FILE, "close files\n");
1474
1475         for_each_file(td, f, i) {
1476                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1477                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1478                         td_io_unlink_file(td, f);
1479                 }
1480
1481                 if (fio_file_open(f))
1482                         td_io_close_file(td, f);
1483
1484                 remove_file_hash(f);
1485
1486                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1487                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1488                         td_io_unlink_file(td, f);
1489                 }
1490
1491                 zbd_close_file(f);
1492                 fio_file_free(f);
1493         }
1494
1495         td->o.filename = NULL;
1496         free(td->files);
1497         free(td->file_locks);
1498         td->files_index = 0;
1499         td->files = NULL;
1500         td->file_locks = NULL;
1501         td->o.file_lock_mode = FILE_LOCK_NONE;
1502         td->o.nr_files = 0;
1503 }
1504
1505 static void get_file_type(struct fio_file *f)
1506 {
1507         struct stat sb;
1508
1509         if (!strcmp(f->file_name, "-"))
1510                 f->filetype = FIO_TYPE_PIPE;
1511         else
1512                 f->filetype = FIO_TYPE_FILE;
1513
1514 #ifdef WIN32
1515         /* \\.\ is the device namespace in Windows, where every file is
1516          * a block device */
1517         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1518                 f->filetype = FIO_TYPE_BLOCK;
1519 #endif
1520
1521         if (!stat(f->file_name, &sb)) {
1522                 if (S_ISBLK(sb.st_mode))
1523                         f->filetype = FIO_TYPE_BLOCK;
1524                 else if (S_ISCHR(sb.st_mode))
1525                         f->filetype = FIO_TYPE_CHAR;
1526                 else if (S_ISFIFO(sb.st_mode))
1527                         f->filetype = FIO_TYPE_PIPE;
1528         }
1529 }
1530
1531 static bool __is_already_allocated(const char *fname, bool set)
1532 {
1533         struct flist_head *entry;
1534         bool ret;
1535
1536         ret = file_bloom_exists(fname, set);
1537         if (!ret)
1538                 return ret;
1539
1540         flist_for_each(entry, &filename_list) {
1541                 struct file_name *fn;
1542
1543                 fn = flist_entry(entry, struct file_name, list);
1544
1545                 if (!strcmp(fn->filename, fname))
1546                         return true;
1547         }
1548
1549         return false;
1550 }
1551
1552 static bool is_already_allocated(const char *fname)
1553 {
1554         bool ret;
1555
1556         fio_file_hash_lock();
1557         ret = __is_already_allocated(fname, false);
1558         fio_file_hash_unlock();
1559
1560         return ret;
1561 }
1562
1563 static void set_already_allocated(const char *fname)
1564 {
1565         struct file_name *fn;
1566
1567         fn = malloc(sizeof(struct file_name));
1568         fn->filename = strdup(fname);
1569
1570         fio_file_hash_lock();
1571         if (!__is_already_allocated(fname, true)) {
1572                 flist_add_tail(&fn->list, &filename_list);
1573                 fn = NULL;
1574         }
1575         fio_file_hash_unlock();
1576
1577         if (fn) {
1578                 free(fn->filename);
1579                 free(fn);
1580         }
1581 }
1582
1583 static void free_already_allocated(void)
1584 {
1585         struct flist_head *entry, *tmp;
1586         struct file_name *fn;
1587
1588         if (flist_empty(&filename_list))
1589                 return;
1590
1591         fio_file_hash_lock();
1592         flist_for_each_safe(entry, tmp, &filename_list) {
1593                 fn = flist_entry(entry, struct file_name, list);
1594                 free(fn->filename);
1595                 flist_del(&fn->list);
1596                 free(fn);
1597         }
1598
1599         fio_file_hash_unlock();
1600 }
1601
1602 static struct fio_file *alloc_new_file(struct thread_data *td)
1603 {
1604         struct fio_file *f;
1605
1606         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1607                 f = calloc(1, sizeof(*f));
1608         else
1609                 f = scalloc(1, sizeof(*f));
1610         if (!f) {
1611                 assert(0);
1612                 return NULL;
1613         }
1614
1615         f->fd = -1;
1616         f->shadow_fd = -1;
1617         fio_file_reset(td, f);
1618         if (!td_ioengine_flagged(td, FIO_NOFILEHASH))
1619                 fio_file_set_smalloc(f);
1620         return f;
1621 }
1622
1623 bool exists_and_not_regfile(const char *filename)
1624 {
1625         struct stat sb;
1626
1627         if (lstat(filename, &sb) == -1)
1628                 return false;
1629
1630 #ifndef WIN32 /* NOT Windows */
1631         if (S_ISREG(sb.st_mode))
1632                 return false;
1633 #else
1634         /* \\.\ is the device namespace in Windows, where every file
1635          * is a device node */
1636         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1637                 return false;
1638 #endif
1639
1640         return true;
1641 }
1642
1643 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1644 {
1645         int cur_files = td->files_index;
1646         char file_name[PATH_MAX];
1647         struct fio_file *f;
1648         int len = 0;
1649
1650         dprint(FD_FILE, "add file %s\n", fname);
1651
1652         if (td->o.directory)
1653                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1654                                         td->o.unique_filename);
1655
1656         sprintf(file_name + len, "%s", fname);
1657
1658         /* clean cloned siblings using existing files */
1659         if (numjob && is_already_allocated(file_name) &&
1660             !exists_and_not_regfile(fname))
1661                 return 0;
1662
1663         f = alloc_new_file(td);
1664
1665         if (td->files_size <= td->files_index) {
1666                 unsigned int new_size = td->o.nr_files + 1;
1667
1668                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1669
1670                 td->files = realloc(td->files, new_size * sizeof(f));
1671                 if (td->files == NULL) {
1672                         log_err("fio: realloc OOM\n");
1673                         assert(0);
1674                 }
1675                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1676                         td->file_locks = realloc(td->file_locks, new_size);
1677                         if (!td->file_locks) {
1678                                 log_err("fio: realloc OOM\n");
1679                                 assert(0);
1680                         }
1681                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1682                 }
1683                 td->files_size = new_size;
1684         }
1685         td->files[cur_files] = f;
1686         f->fileno = cur_files;
1687
1688         /*
1689          * init function, io engine may not be loaded yet
1690          */
1691         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1692                 f->real_file_size = -1ULL;
1693
1694         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1695                 f->file_name = strdup(file_name);
1696         else
1697                 f->file_name = smalloc_strdup(file_name);
1698
1699         /* can't handle smalloc failure from here */
1700         assert(f->file_name);
1701
1702         get_file_type(f);
1703
1704         switch (td->o.file_lock_mode) {
1705         case FILE_LOCK_NONE:
1706                 break;
1707         case FILE_LOCK_READWRITE:
1708                 f->rwlock = fio_rwlock_init();
1709                 break;
1710         case FILE_LOCK_EXCLUSIVE:
1711                 f->lock = fio_sem_init(FIO_SEM_UNLOCKED);
1712                 break;
1713         default:
1714                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1715                 assert(0);
1716         }
1717
1718         td->files_index++;
1719
1720         if (td->o.numjobs > 1)
1721                 set_already_allocated(file_name);
1722
1723         if (inc)
1724                 td->o.nr_files++;
1725
1726         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1727                                                         cur_files);
1728
1729         return cur_files;
1730 }
1731
1732 int add_file_exclusive(struct thread_data *td, const char *fname)
1733 {
1734         struct fio_file *f;
1735         unsigned int i;
1736
1737         for_each_file(td, f, i) {
1738                 if (!strcmp(f->file_name, fname))
1739                         return i;
1740         }
1741
1742         return add_file(td, fname, 0, 1);
1743 }
1744
1745 void get_file(struct fio_file *f)
1746 {
1747         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1748         assert(fio_file_open(f));
1749         f->references++;
1750 }
1751
1752 int put_file(struct thread_data *td, struct fio_file *f)
1753 {
1754         int f_ret = 0, ret = 0;
1755
1756         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1757
1758         if (!fio_file_open(f)) {
1759                 assert(f->fd == -1);
1760                 return 0;
1761         }
1762
1763         assert(f->references);
1764         if (--f->references)
1765                 return 0;
1766
1767         disk_util_dec(f->du);
1768
1769         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1770                 unlock_file_all(td, f);
1771
1772         if (should_fsync(td) && td->o.fsync_on_close) {
1773                 f_ret = fsync(f->fd);
1774                 if (f_ret < 0)
1775                         f_ret = errno;
1776         }
1777
1778         if (td->io_ops->close_file)
1779                 ret = td->io_ops->close_file(td, f);
1780
1781         if (!ret)
1782                 ret = f_ret;
1783
1784         td->nr_open_files--;
1785         fio_file_clear_closing(f);
1786         fio_file_clear_open(f);
1787         assert(f->fd == -1);
1788         return ret;
1789 }
1790
1791 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1792 {
1793         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1794                 return;
1795
1796         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1797                 if (ddir == DDIR_READ)
1798                         fio_rwlock_read(f->rwlock);
1799                 else
1800                         fio_rwlock_write(f->rwlock);
1801         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1802                 fio_sem_down(f->lock);
1803
1804         td->file_locks[f->fileno] = td->o.file_lock_mode;
1805 }
1806
1807 void unlock_file(struct thread_data *td, struct fio_file *f)
1808 {
1809         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1810                 return;
1811
1812         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1813                 fio_rwlock_unlock(f->rwlock);
1814         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1815                 fio_sem_up(f->lock);
1816
1817         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1818 }
1819
1820 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1821 {
1822         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1823                 return;
1824         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1825                 unlock_file(td, f);
1826 }
1827
1828 static bool recurse_dir(struct thread_data *td, const char *dirname)
1829 {
1830         struct dirent *dir;
1831         bool ret = false;
1832         DIR *D;
1833
1834         D = opendir(dirname);
1835         if (!D) {
1836                 char buf[FIO_VERROR_SIZE];
1837
1838                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1839                 td_verror(td, errno, buf);
1840                 return true;
1841         }
1842
1843         while ((dir = readdir(D)) != NULL) {
1844                 char full_path[PATH_MAX];
1845                 struct stat sb;
1846
1847                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1848                         continue;
1849
1850                 sprintf(full_path, "%s%c%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1851
1852                 if (lstat(full_path, &sb) == -1) {
1853                         if (errno != ENOENT) {
1854                                 td_verror(td, errno, "stat");
1855                                 ret = true;
1856                                 break;
1857                         }
1858                 }
1859
1860                 if (S_ISREG(sb.st_mode)) {
1861                         add_file(td, full_path, 0, 1);
1862                         continue;
1863                 }
1864                 if (!S_ISDIR(sb.st_mode))
1865                         continue;
1866
1867                 ret = recurse_dir(td, full_path);
1868                 if (ret)
1869                         break;
1870         }
1871
1872         closedir(D);
1873         return ret;
1874 }
1875
1876 int add_dir_files(struct thread_data *td, const char *path)
1877 {
1878         int ret = recurse_dir(td, path);
1879
1880         if (!ret)
1881                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1882
1883         return ret;
1884 }
1885
1886 void dup_files(struct thread_data *td, struct thread_data *org)
1887 {
1888         struct fio_file *f;
1889         unsigned int i;
1890
1891         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1892
1893         if (!org->files)
1894                 return;
1895
1896         td->files = malloc(org->files_index * sizeof(f));
1897
1898         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1899                 td->file_locks = malloc(org->files_index);
1900
1901         for_each_file(org, f, i) {
1902                 struct fio_file *__f;
1903
1904                 __f = alloc_new_file(td);
1905
1906                 if (f->file_name) {
1907                         if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1908                                 __f->file_name = strdup(f->file_name);
1909                         else
1910                                 __f->file_name = smalloc_strdup(f->file_name);
1911
1912                         /* can't handle smalloc failure from here */
1913                         assert(__f->file_name);
1914                         __f->filetype = f->filetype;
1915                 }
1916
1917                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1918                         __f->lock = f->lock;
1919                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1920                         __f->rwlock = f->rwlock;
1921
1922                 td->files[i] = __f;
1923         }
1924 }
1925
1926 /*
1927  * Returns the index that matches the filename, or -1 if not there
1928  */
1929 int get_fileno(struct thread_data *td, const char *fname)
1930 {
1931         struct fio_file *f;
1932         unsigned int i;
1933
1934         for_each_file(td, f, i)
1935                 if (!strcmp(f->file_name, fname))
1936                         return i;
1937
1938         return -1;
1939 }
1940
1941 /*
1942  * For log usage, where we add/open/close files automatically
1943  */
1944 void free_release_files(struct thread_data *td)
1945 {
1946         close_files(td);
1947         td->o.nr_files = 0;
1948         td->o.open_files = 0;
1949         td->files_index = 0;
1950 }
1951
1952 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1953 {
1954         int i;
1955
1956         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1957                 f->last_pos[i] = f->file_offset;
1958                 f->last_start[i] = -1ULL;
1959         }
1960
1961         if (fio_file_axmap(f))
1962                 axmap_reset(f->io_axmap);
1963         else if (fio_file_lfsr(f))
1964                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1965
1966         zbd_file_reset(td, f);
1967 }
1968
1969 bool fio_files_done(struct thread_data *td)
1970 {
1971         struct fio_file *f;
1972         unsigned int i;
1973
1974         for_each_file(td, f, i)
1975                 if (!fio_file_done(f))
1976                         return false;
1977
1978         return true;
1979 }
1980
1981 /* free memory used in initialization phase only */
1982 void filesetup_mem_free(void)
1983 {
1984         free_already_allocated();
1985 }
1986
1987 /*
1988  * This function is for platforms which support direct I/O but not O_DIRECT.
1989  */
1990 int fio_set_directio(struct thread_data *td, struct fio_file *f)
1991 {
1992 #ifdef FIO_OS_DIRECTIO
1993         int ret = fio_set_odirect(f);
1994
1995         if (ret) {
1996                 td_verror(td, ret, "fio_set_directio");
1997 #if defined(__sun__)
1998                 if (ret == ENOTTY) { /* ENOTTY suggests RAW device or ZFS */
1999                         log_err("fio: doing directIO to RAW devices or ZFS not supported\n");
2000                 } else {
2001                         log_err("fio: the file system does not seem to support direct IO\n");
2002                 }
2003 #else
2004                 log_err("fio: the file system does not seem to support direct IO\n");
2005 #endif
2006                 return -1;
2007         }
2008
2009         return 0;
2010 #else
2011         log_err("fio: direct IO is not supported on this host operating system\n");
2012         return -1;
2013 #endif
2014 }