No need to return an error from get_file_sizes()
[fio.git] / filesetup.c
CommitLineData
53cdc686
JA
1#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <assert.h>
bbf6b540 5#include <dirent.h>
53cdc686
JA
6#include <sys/stat.h>
7#include <sys/mman.h>
bbf6b540 8#include <sys/types.h>
53cdc686
JA
9
10#include "fio.h"
11#include "os.h"
12
7bb48f84 13static int extend_file(struct thread_data *td, struct fio_file *f)
25205e97 14{
507a702f 15 int r, new_layout = 0, flags;
25205e97
JA
16 unsigned long long left;
17 unsigned int bs;
18 char *b;
b2a15192 19
507a702f
JA
20 /*
21 * check if we need to lay the file out complete again. fio
22 * does that for operations involving reads, or for writes
23 * where overwrite is set
24 */
25 if (td_read(td) || (td_write(td) && td->o.overwrite))
26 new_layout = 1;
27
28 if (new_layout && (f->flags & FIO_FILE_EXISTS)) {
7bb48f84
JA
29 if (unlink(f->file_name) < 0) {
30 td_verror(td, errno, "unlink");
31 return 1;
32 }
33 }
34
507a702f
JA
35 flags = O_WRONLY | O_CREAT;
36 if (new_layout)
37 flags |= O_TRUNC;
38
39 f->fd = open(f->file_name, flags, 0644);
53cdc686 40 if (f->fd < 0) {
e1161c32 41 td_verror(td, errno, "open");
53cdc686
JA
42 return 1;
43 }
44
7bb48f84 45 if (ftruncate(f->fd, f->real_file_size) == -1) {
e1161c32 46 td_verror(td, errno, "ftruncate");
53cdc686
JA
47 goto err;
48 }
49
7bb48f84 50 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
e1161c32 51 td_verror(td, errno, "posix_fallocate");
40f8298c
JA
52 goto err;
53 }
54
507a702f
JA
55 if (!new_layout)
56 goto done;
57
2dc1bbeb
JA
58 b = malloc(td->o.max_bs[DDIR_WRITE]);
59 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
53cdc686 60
7bb48f84 61 left = f->real_file_size;
53cdc686 62 while (left && !td->terminate) {
2dc1bbeb 63 bs = td->o.max_bs[DDIR_WRITE];
53cdc686
JA
64 if (bs > left)
65 bs = left;
66
67 r = write(f->fd, b, bs);
68
69 if (r == (int) bs) {
70 left -= bs;
71 continue;
72 } else {
73 if (r < 0)
e1161c32 74 td_verror(td, errno, "write");
53cdc686 75 else
e1161c32 76 td_verror(td, EIO, "write");
53cdc686
JA
77
78 break;
79 }
80 }
81
82 if (td->terminate)
83 unlink(f->file_name);
2dc1bbeb 84 else if (td->o.create_fsync)
53cdc686
JA
85 fsync(f->fd);
86
87 free(b);
507a702f 88done:
53cdc686
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89 close(f->fd);
90 f->fd = -1;
91 return 0;
92err:
93 close(f->fd);
94 f->fd = -1;
95 return 1;
96}
97
7bb48f84 98static unsigned long long get_rand_file_size(struct thread_data *td)
9c60ce64 99{
9c60ce64
JA
100 unsigned long long ret;
101 long r;
102
9c60ce64 103 r = os_random_long(&td->file_size_state);
7bb48f84 104 ret = td->o.file_size_low + (unsigned long long) ((double) td->o.file_size_high * (r / (RAND_MAX + 1.0)));
2dc1bbeb 105 ret -= (ret % td->o.rw_min_bs);
9c60ce64
JA
106 return ret;
107}
108
53cdc686
JA
109static int file_size(struct thread_data *td, struct fio_file *f)
110{
111 struct stat st;
112
7bb48f84
JA
113 if (fstat(f->fd, &st) == -1) {
114 td_verror(td, errno, "fstat");
115 return 1;
116 }
53cdc686 117
7bb48f84 118 f->real_file_size = st.st_size;
53cdc686
JA
119 return 0;
120}
121
122static int bdev_size(struct thread_data *td, struct fio_file *f)
123{
124 unsigned long long bytes;
125 int r;
126
127 r = blockdev_size(f->fd, &bytes);
128 if (r) {
e1161c32 129 td_verror(td, r, "blockdev_size");
53cdc686
JA
130 return 1;
131 }
132
133 f->real_file_size = bytes;
53cdc686
JA
134 return 0;
135}
136
137static int get_file_size(struct thread_data *td, struct fio_file *f)
138{
139 int ret = 0;
140
7bb48f84
JA
141 if (f->filetype == FIO_TYPE_FILE)
142 ret = file_size(td, f);
143 else if (f->filetype == FIO_TYPE_BD)
53cdc686
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144 ret = bdev_size(td, f);
145 else
146 f->real_file_size = -1;
147
148 if (ret)
149 return ret;
150
151 if (f->file_offset > f->real_file_size) {
2dc1bbeb 152 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
53cdc686
JA
153 return 1;
154 }
155
53cdc686
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156 return 0;
157}
158
e5b401d4
JA
159int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
160{
161 int ret = 0;
162
2dc1bbeb 163 if (td->o.odirect)
b5af8293
JA
164 return 0;
165
e5b401d4
JA
166 /*
167 * FIXME: add blockdev flushing too
168 */
b5af8293 169 if (f->mmap)
7bb48f84 170 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
467d1b6b 171 else if (f->filetype == FIO_TYPE_FILE)
7bb48f84 172 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
7e0e25c9 173 else if (f->filetype == FIO_TYPE_BD) {
b5af8293 174 ret = blockdev_invalidate_cache(f->fd);
7e0e25c9
JA
175 if (ret < 0 && errno == EACCES && geteuid()) {
176 log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
177 ret = 0;
178 }
179 } else if (f->filetype == FIO_TYPE_CHAR)
e5b401d4
JA
180 ret = 0;
181
182 if (ret < 0) {
e1161c32 183 td_verror(td, errno, "invalidate_cache");
e5b401d4
JA
184 return 1;
185 }
186
ad2da605 187 return ret;
e5b401d4
JA
188}
189
b5af8293 190void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
53cdc686 191{
b5af8293
JA
192 close(f->fd);
193 f->fd = -1;
53cdc686
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194}
195
b5af8293 196int generic_open_file(struct thread_data *td, struct fio_file *f)
53cdc686 197{
53cdc686
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198 int flags = 0;
199
2dc1bbeb 200 if (td->o.odirect)
2fd233b7 201 flags |= OS_O_DIRECT;
2dc1bbeb 202 if (td->o.sync_io)
2fd233b7 203 flags |= O_SYNC;
53cdc686 204
2fd233b7
JA
205 if (td_write(td) || td_rw(td)) {
206 flags |= O_RDWR;
53cdc686 207
af52b345 208 if (f->filetype == FIO_TYPE_FILE)
2fd233b7 209 flags |= O_CREAT;
2fd233b7 210
b5af8293 211 f->fd = open(f->file_name, flags, 0600);
2fd233b7 212 } else {
af52b345 213 if (f->filetype == FIO_TYPE_CHAR)
2fd233b7
JA
214 flags |= O_RDWR;
215 else
216 flags |= O_RDONLY;
217
b5af8293 218 f->fd = open(f->file_name, flags);
53cdc686
JA
219 }
220
221 if (f->fd == -1) {
e4e33258 222 char buf[FIO_VERROR_SIZE];
e1161c32
JA
223 int __e = errno;
224
e4e33258
JA
225 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
226
227 td_verror(td, __e, buf);
53cdc686
JA
228 }
229
b5af8293
JA
230 if (get_file_size(td, f))
231 goto err;
232
53cdc686 233 return 0;
b5af8293
JA
234err:
235 close(f->fd);
236 return 1;
237}
238
21972cde
JA
239int open_files(struct thread_data *td)
240{
241 struct fio_file *f;
af52b345
JA
242 unsigned int i;
243 int err = 0;
21972cde
JA
244
245 for_each_file(td, f, i) {
b5af8293 246 err = td_io_open_file(td, f);
21972cde
JA
247 if (err)
248 break;
b5af8293 249
2dc1bbeb 250 if (td->o.open_files == td->nr_open_files)
b5af8293 251 break;
21972cde
JA
252 }
253
7abf833d
JA
254 if (!err)
255 return 0;
256
bdb4e2e9 257 for_each_file(td, f, i)
b5af8293 258 td_io_close_file(td, f);
7abf833d 259
21972cde
JA
260 return err;
261}
262
7bb48f84
JA
263/*
264 * open/close all files, so that ->real_file_size gets set
265 */
000b0803 266static void get_file_sizes(struct thread_data *td)
7bb48f84
JA
267{
268 struct fio_file *f;
269 unsigned int i;
7bb48f84
JA
270
271 for_each_file(td, f, i) {
000b0803 272 if (td->io_ops->open_file(td, f)) {
7bb48f84
JA
273 td->error = 0;
274 memset(td->verror, 0, sizeof(td->verror));
000b0803
JA
275 } else
276 td->io_ops->close_file(td, f);
7bb48f84 277 }
7bb48f84
JA
278}
279
280/*
281 * Open the files and setup files sizes, creating files if necessary.
282 */
53cdc686
JA
283int setup_files(struct thread_data *td)
284{
7bb48f84 285 unsigned long long total_size, extend_size;
53cdc686 286 struct fio_file *f;
af52b345 287 unsigned int i;
000b0803 288 int err = 0, need_extend;
53cdc686
JA
289
290 /*
291 * if ioengine defines a setup() method, it's responsible for
7bb48f84
JA
292 * opening the files and setting f->real_file_size to indicate
293 * the valid range for that file.
53cdc686
JA
294 */
295 if (td->io_ops->setup)
7bb48f84
JA
296 err = td->io_ops->setup(td);
297 else
000b0803 298 get_file_sizes(td);
53cdc686 299
f1027063
JA
300 if (err)
301 return err;
302
0a7eb121 303 /*
7bb48f84
JA
304 * check sizes. if the files/devices do not exist and the size
305 * isn't passed to fio, abort.
0a7eb121 306 */
7bb48f84
JA
307 total_size = 0;
308 for_each_file(td, f, i) {
309 if (f->real_file_size == -1ULL)
310 total_size = -1ULL;
311 else
312 total_size += f->real_file_size;
313 }
0a7eb121 314
7bb48f84
JA
315 /*
316 * device/file sizes are zero and no size given, punt
317 */
318 if (!total_size && !td->o.size) {
319 log_err("%s: you need to specify size=\n", td->o.name);
e1161c32 320 td_verror(td, EINVAL, "total_file_size");
53cdc686
JA
321 return 1;
322 }
323
7bb48f84
JA
324 /*
325 * now file sizes are known, so we can set ->io_size. if size= is
326 * not given, ->io_size is just equal to ->real_file_size. if size
327 * is given, ->io_size is size / nr_files.
328 */
329 extend_size = total_size = 0;
330 need_extend = 0;
331 for_each_file(td, f, i) {
332 if (!td->o.file_size_low) {
333 /*
334 * no file size range given, file size is equal to
335 * total size divided by number of files. if that is
336 * zero, set it to the real file size.
337 */
338 f->io_size = td->o.size / td->o.nr_files;
339 if (!f->io_size)
340 f->io_size = f->real_file_size;
341 } else if (f->real_file_size < td->o.file_size_low ||
342 f->real_file_size > td->o.file_size_high) {
343 /*
344 * file size given. if it's fixed, use that. if it's a
345 * range, generate a random size in-between.
346 */
347 if (td->o.file_size_low == td->o.file_size_high)
348 f->io_size = td->o.file_size_low;
349 else
350 f->io_size = get_rand_file_size(td);
351 } else
352 f->io_size = f->real_file_size;
53cdc686 353
7bb48f84
JA
354 if (f->io_size == -1ULL)
355 total_size = -1ULL;
356 else
357 total_size += f->io_size;
358
359 if (f->filetype == FIO_TYPE_FILE &&
360 f->io_size > f->real_file_size &&
361 !(td->io_ops->flags & FIO_DISKLESSIO)) {
362 need_extend++;
363 extend_size += f->io_size;
364 f->flags |= FIO_FILE_EXTEND;
365 }
366 }
53cdc686 367
7bb48f84
JA
368 if (!td->o.size)
369 td->o.size = total_size;
21972cde 370
7bb48f84
JA
371 /*
372 * See if we need to extend some files
373 */
374 if (need_extend) {
375 temp_stall_ts = 1;
376 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
377 td->o.name, need_extend, extend_size >> 20);
378
379 for_each_file(td, f, i) {
380 if (!(f->flags & FIO_FILE_EXTEND))
381 continue;
382
383 f->flags &= ~FIO_FILE_EXTEND;
384 f->real_file_size = f->io_size;
385 err = extend_file(td, f);
386 if (err)
387 break;
388 }
389 temp_stall_ts = 0;
390 }
391
392 if (err)
393 return err;
394
395 if (!td->o.zone_size)
396 td->o.zone_size = td->o.size;
397
398 td->total_io_size = td->o.size * td->o.loops;
399 return 0;
53cdc686
JA
400}
401
68727076
JA
402int init_random_map(struct thread_data *td)
403{
404 int num_maps, blocks;
405 struct fio_file *f;
406 unsigned int i;
407
408 if (td->o.norandommap)
409 return 0;
410
411 for_each_file(td, f, i) {
412 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
413 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
414 f->file_map = malloc(num_maps * sizeof(long));
415 if (!f->file_map) {
416 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
417 return 1;
418 }
419 f->num_maps = num_maps;
420 memset(f->file_map, 0, num_maps * sizeof(long));
421 }
422
423 return 0;
424}
425
53cdc686
JA
426void close_files(struct thread_data *td)
427{
0ab8db89 428 struct fio_file *f;
af52b345 429 unsigned int i;
53cdc686 430
0ab8db89 431 for_each_file(td, f, i) {
fa1da865
JA
432 if ((f->flags & FIO_FILE_UNLINK) &&
433 f->filetype == FIO_TYPE_FILE)
132ad46d 434 unlink(f->file_name);
bdb4e2e9 435
b5af8293 436 td_io_close_file(td, f);
b3dc7f07 437
fa1da865
JA
438 free(f->file_name);
439 f->file_name = NULL;
440
c343981b 441 if (f->file_map) {
b3dc7f07 442 free(f->file_map);
c343981b
JA
443 f->file_map = NULL;
444 }
53cdc686 445 }
b4a6a59a 446
2dc1bbeb 447 td->o.filename = NULL;
cade3ef4 448 free(td->files);
b4a6a59a 449 td->files = NULL;
2dc1bbeb 450 td->o.nr_files = 0;
53cdc686 451}
af52b345 452
e3bab463 453static void get_file_type(struct fio_file *f)
af52b345
JA
454{
455 struct stat sb;
456
457 f->filetype = FIO_TYPE_FILE;
458
e3bab463 459 if (!lstat(f->file_name, &sb)) {
af52b345
JA
460 if (S_ISBLK(sb.st_mode))
461 f->filetype = FIO_TYPE_BD;
462 else if (S_ISCHR(sb.st_mode))
463 f->filetype = FIO_TYPE_CHAR;
464 }
465}
466
467void add_file(struct thread_data *td, const char *fname)
468{
7b4e4fe5 469 int cur_files = td->files_index;
bd0ee748 470 char file_name[PATH_MAX];
af52b345 471 struct fio_file *f;
bd0ee748 472 int len = 0;
af52b345
JA
473
474 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
475
476 f = &td->files[cur_files];
477 memset(f, 0, sizeof(*f));
478 f->fd = -1;
bd0ee748
JA
479
480 if (td->o.directory)
481 len = sprintf(file_name, "%s/", td->o.directory);
482
483 sprintf(file_name + len, "%s", fname);
484 f->file_name = strdup(file_name);
af52b345 485
e3bab463 486 get_file_type(f);
af52b345 487
7b4e4fe5 488 td->files_index++;
1549441c
JA
489 if (f->filetype == FIO_TYPE_FILE)
490 td->nr_normal_files++;
af52b345 491}
0ad920e7
JA
492
493void get_file(struct fio_file *f)
494{
495 f->references++;
496}
497
498void put_file(struct thread_data *td, struct fio_file *f)
499{
500 if (!(f->flags & FIO_FILE_OPEN))
501 return;
502
503 assert(f->references);
504 if (--f->references)
505 return;
506
2dc1bbeb 507 if (should_fsync(td) && td->o.fsync_on_close)
ebb1415f
JA
508 fsync(f->fd);
509
0ad920e7
JA
510 if (td->io_ops->close_file)
511 td->io_ops->close_file(td, f);
512 td->nr_open_files--;
513 f->flags &= ~FIO_FILE_OPEN;
514}
bbf6b540
JA
515
516static int recurse_dir(struct thread_data *td, const char *dirname)
517{
518 struct dirent *dir;
519 int ret = 0;
520 DIR *D;
521
522 D = opendir(dirname);
523 if (!D) {
524 td_verror(td, errno, "opendir");
525 return 1;
526 }
527
528 while ((dir = readdir(D)) != NULL) {
529 char full_path[PATH_MAX];
530 struct stat sb;
531
e85b2b83
JA
532 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
533 continue;
96d32d51 534
bbf6b540
JA
535 sprintf(full_path, "%s/%s", dirname, dir->d_name);
536
537 if (lstat(full_path, &sb) == -1) {
538 if (errno != ENOENT) {
539 td_verror(td, errno, "stat");
540 return 1;
541 }
542 }
543
544 if (S_ISREG(sb.st_mode)) {
545 add_file(td, full_path);
2dc1bbeb 546 td->o.nr_files++;
bbf6b540
JA
547 continue;
548 }
549
bbf6b540
JA
550 if ((ret = recurse_dir(td, full_path)) != 0)
551 break;
552 }
553
554 closedir(D);
555 return ret;
556}
557
558int add_dir_files(struct thread_data *td, const char *path)
559{
560 return recurse_dir(td, path);
561}
cade3ef4
JA
562
563void dup_files(struct thread_data *td, struct thread_data *org)
564{
565 struct fio_file *f;
566 unsigned int i;
567 size_t bytes;
568
569 if (!org->files)
570 return;
571
572 bytes = org->files_index * sizeof(*f);
573 td->files = malloc(bytes);
574 memcpy(td->files, org->files, bytes);
575
576 for_each_file(td, f, i) {
577 if (f->file_name)
578 f->file_name = strdup(f->file_name);
579 }
580}