Only overwrite in layout if needed
[fio.git] / filesetup.c
... / ...
CommitLineData
1#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <assert.h>
5#include <dirent.h>
6#include <sys/stat.h>
7#include <sys/mman.h>
8#include <sys/types.h>
9
10#include "fio.h"
11#include "os.h"
12
13static int extend_file(struct thread_data *td, struct fio_file *f)
14{
15 int r, new_layout = 0, flags;
16 unsigned long long left;
17 unsigned int bs;
18 char *b;
19
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)) {
29 if (unlink(f->file_name) < 0) {
30 td_verror(td, errno, "unlink");
31 return 1;
32 }
33 }
34
35 flags = O_WRONLY | O_CREAT;
36 if (new_layout)
37 flags |= O_TRUNC;
38
39 f->fd = open(f->file_name, flags, 0644);
40 if (f->fd < 0) {
41 td_verror(td, errno, "open");
42 return 1;
43 }
44
45 if (ftruncate(f->fd, f->real_file_size) == -1) {
46 td_verror(td, errno, "ftruncate");
47 goto err;
48 }
49
50 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
51 td_verror(td, errno, "posix_fallocate");
52 goto err;
53 }
54
55 if (!new_layout)
56 goto done;
57
58 b = malloc(td->o.max_bs[DDIR_WRITE]);
59 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
60
61 left = f->real_file_size;
62 while (left && !td->terminate) {
63 bs = td->o.max_bs[DDIR_WRITE];
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)
74 td_verror(td, errno, "write");
75 else
76 td_verror(td, EIO, "write");
77
78 break;
79 }
80 }
81
82 if (td->terminate)
83 unlink(f->file_name);
84 else if (td->o.create_fsync)
85 fsync(f->fd);
86
87 free(b);
88done:
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
98static unsigned long long get_rand_file_size(struct thread_data *td)
99{
100 unsigned long long ret;
101 long r;
102
103 r = os_random_long(&td->file_size_state);
104 ret = td->o.file_size_low + (unsigned long long) ((double) td->o.file_size_high * (r / (RAND_MAX + 1.0)));
105 ret -= (ret % td->o.rw_min_bs);
106 return ret;
107}
108
109static int file_size(struct thread_data *td, struct fio_file *f)
110{
111 struct stat st;
112
113 if (fstat(f->fd, &st) == -1) {
114 td_verror(td, errno, "fstat");
115 return 1;
116 }
117
118 f->real_file_size = st.st_size;
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) {
129 td_verror(td, r, "blockdev_size");
130 return 1;
131 }
132
133 f->real_file_size = bytes;
134 return 0;
135}
136
137static int get_file_size(struct thread_data *td, struct fio_file *f)
138{
139 int ret = 0;
140
141 if (f->filetype == FIO_TYPE_FILE)
142 ret = file_size(td, f);
143 else if (f->filetype == FIO_TYPE_BD)
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) {
152 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
153 return 1;
154 }
155
156 return 0;
157}
158
159int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
160{
161 int ret = 0;
162
163 if (td->o.odirect)
164 return 0;
165
166 /*
167 * FIXME: add blockdev flushing too
168 */
169 if (f->mmap)
170 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
171 else if (f->filetype == FIO_TYPE_FILE)
172 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
173 else if (f->filetype == FIO_TYPE_BD) {
174 ret = blockdev_invalidate_cache(f->fd);
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)
180 ret = 0;
181
182 if (ret < 0) {
183 td_verror(td, errno, "invalidate_cache");
184 return 1;
185 }
186
187 return ret;
188}
189
190void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
191{
192 close(f->fd);
193 f->fd = -1;
194}
195
196int generic_open_file(struct thread_data *td, struct fio_file *f)
197{
198 int flags = 0;
199
200 if (td->o.odirect)
201 flags |= OS_O_DIRECT;
202 if (td->o.sync_io)
203 flags |= O_SYNC;
204
205 if (td_write(td) || td_rw(td)) {
206 flags |= O_RDWR;
207
208 if (f->filetype == FIO_TYPE_FILE)
209 flags |= O_CREAT;
210
211 f->fd = open(f->file_name, flags, 0600);
212 } else {
213 if (f->filetype == FIO_TYPE_CHAR)
214 flags |= O_RDWR;
215 else
216 flags |= O_RDONLY;
217
218 f->fd = open(f->file_name, flags);
219 }
220
221 if (f->fd == -1) {
222 char buf[FIO_VERROR_SIZE];
223 int __e = errno;
224
225 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
226
227 td_verror(td, __e, buf);
228 }
229
230 if (get_file_size(td, f))
231 goto err;
232
233 return 0;
234err:
235 close(f->fd);
236 return 1;
237}
238
239int open_files(struct thread_data *td)
240{
241 struct fio_file *f;
242 unsigned int i;
243 int err = 0;
244
245 for_each_file(td, f, i) {
246 err = td_io_open_file(td, f);
247 if (err)
248 break;
249
250 if (td->o.open_files == td->nr_open_files)
251 break;
252 }
253
254 if (!err)
255 return 0;
256
257 for_each_file(td, f, i)
258 td_io_close_file(td, f);
259
260 return err;
261}
262
263/*
264 * open/close all files, so that ->real_file_size gets set
265 */
266static int get_file_sizes(struct thread_data *td)
267{
268 struct fio_file *f;
269 unsigned int i;
270 int err = 0;
271
272 for_each_file(td, f, i) {
273 err = td->io_ops->open_file(td, f);
274 if (err) {
275 td->error = 0;
276 memset(td->verror, 0, sizeof(td->verror));
277 err = 0;
278 continue;
279 }
280
281 td->io_ops->close_file(td, f);
282 }
283
284 return err;
285}
286
287/*
288 * Open the files and setup files sizes, creating files if necessary.
289 */
290int setup_files(struct thread_data *td)
291{
292 unsigned long long total_size, extend_size;
293 struct fio_file *f;
294 unsigned int i;
295 int err, need_extend;
296
297 /*
298 * if ioengine defines a setup() method, it's responsible for
299 * opening the files and setting f->real_file_size to indicate
300 * the valid range for that file.
301 */
302 if (td->io_ops->setup)
303 err = td->io_ops->setup(td);
304 else
305 err = get_file_sizes(td);
306
307 if (err)
308 return err;
309
310 /*
311 * check sizes. if the files/devices do not exist and the size
312 * isn't passed to fio, abort.
313 */
314 total_size = 0;
315 for_each_file(td, f, i) {
316 if (f->real_file_size == -1ULL)
317 total_size = -1ULL;
318 else
319 total_size += f->real_file_size;
320 }
321
322 /*
323 * device/file sizes are zero and no size given, punt
324 */
325 if (!total_size && !td->o.size) {
326 log_err("%s: you need to specify size=\n", td->o.name);
327 td_verror(td, EINVAL, "total_file_size");
328 return 1;
329 }
330
331 /*
332 * now file sizes are known, so we can set ->io_size. if size= is
333 * not given, ->io_size is just equal to ->real_file_size. if size
334 * is given, ->io_size is size / nr_files.
335 */
336 extend_size = total_size = 0;
337 need_extend = 0;
338 for_each_file(td, f, i) {
339 if (!td->o.file_size_low) {
340 /*
341 * no file size range given, file size is equal to
342 * total size divided by number of files. if that is
343 * zero, set it to the real file size.
344 */
345 f->io_size = td->o.size / td->o.nr_files;
346 if (!f->io_size)
347 f->io_size = f->real_file_size;
348 } else if (f->real_file_size < td->o.file_size_low ||
349 f->real_file_size > td->o.file_size_high) {
350 /*
351 * file size given. if it's fixed, use that. if it's a
352 * range, generate a random size in-between.
353 */
354 if (td->o.file_size_low == td->o.file_size_high)
355 f->io_size = td->o.file_size_low;
356 else
357 f->io_size = get_rand_file_size(td);
358 } else
359 f->io_size = f->real_file_size;
360
361 if (f->io_size == -1ULL)
362 total_size = -1ULL;
363 else
364 total_size += f->io_size;
365
366 if (f->filetype == FIO_TYPE_FILE &&
367 f->io_size > f->real_file_size &&
368 !(td->io_ops->flags & FIO_DISKLESSIO)) {
369 need_extend++;
370 extend_size += f->io_size;
371 f->flags |= FIO_FILE_EXTEND;
372 }
373 }
374
375 if (!td->o.size)
376 td->o.size = total_size;
377
378 /*
379 * See if we need to extend some files
380 */
381 if (need_extend) {
382 temp_stall_ts = 1;
383 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
384 td->o.name, need_extend, extend_size >> 20);
385
386 for_each_file(td, f, i) {
387 if (!(f->flags & FIO_FILE_EXTEND))
388 continue;
389
390 f->flags &= ~FIO_FILE_EXTEND;
391 f->real_file_size = f->io_size;
392 err = extend_file(td, f);
393 if (err)
394 break;
395 }
396 temp_stall_ts = 0;
397 }
398
399 if (err)
400 return err;
401
402 if (!td->o.zone_size)
403 td->o.zone_size = td->o.size;
404
405 td->total_io_size = td->o.size * td->o.loops;
406 return 0;
407}
408
409int init_random_map(struct thread_data *td)
410{
411 int num_maps, blocks;
412 struct fio_file *f;
413 unsigned int i;
414
415 if (td->o.norandommap)
416 return 0;
417
418 for_each_file(td, f, i) {
419 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
420 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
421 f->file_map = malloc(num_maps * sizeof(long));
422 if (!f->file_map) {
423 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
424 return 1;
425 }
426 f->num_maps = num_maps;
427 memset(f->file_map, 0, num_maps * sizeof(long));
428 }
429
430 return 0;
431}
432
433void close_files(struct thread_data *td)
434{
435 struct fio_file *f;
436 unsigned int i;
437
438 for_each_file(td, f, i) {
439 if ((f->flags & FIO_FILE_UNLINK) &&
440 f->filetype == FIO_TYPE_FILE)
441 unlink(f->file_name);
442
443 td_io_close_file(td, f);
444
445 free(f->file_name);
446 f->file_name = NULL;
447
448 if (f->file_map) {
449 free(f->file_map);
450 f->file_map = NULL;
451 }
452 }
453
454 td->o.filename = NULL;
455 free(td->files);
456 td->files = NULL;
457 td->o.nr_files = 0;
458}
459
460static void get_file_type(struct fio_file *f)
461{
462 struct stat sb;
463
464 f->filetype = FIO_TYPE_FILE;
465
466 if (!lstat(f->file_name, &sb)) {
467 if (S_ISBLK(sb.st_mode))
468 f->filetype = FIO_TYPE_BD;
469 else if (S_ISCHR(sb.st_mode))
470 f->filetype = FIO_TYPE_CHAR;
471 }
472}
473
474void add_file(struct thread_data *td, const char *fname)
475{
476 int cur_files = td->files_index;
477 char file_name[PATH_MAX];
478 struct fio_file *f;
479 int len = 0;
480
481 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
482
483 f = &td->files[cur_files];
484 memset(f, 0, sizeof(*f));
485 f->fd = -1;
486
487 if (td->o.directory)
488 len = sprintf(file_name, "%s/", td->o.directory);
489
490 sprintf(file_name + len, "%s", fname);
491 f->file_name = strdup(file_name);
492
493 get_file_type(f);
494
495 td->files_index++;
496 if (f->filetype == FIO_TYPE_FILE)
497 td->nr_normal_files++;
498}
499
500void get_file(struct fio_file *f)
501{
502 f->references++;
503}
504
505void put_file(struct thread_data *td, struct fio_file *f)
506{
507 if (!(f->flags & FIO_FILE_OPEN))
508 return;
509
510 assert(f->references);
511 if (--f->references)
512 return;
513
514 if (should_fsync(td) && td->o.fsync_on_close)
515 fsync(f->fd);
516
517 if (td->io_ops->close_file)
518 td->io_ops->close_file(td, f);
519 td->nr_open_files--;
520 f->flags &= ~FIO_FILE_OPEN;
521}
522
523static int recurse_dir(struct thread_data *td, const char *dirname)
524{
525 struct dirent *dir;
526 int ret = 0;
527 DIR *D;
528
529 D = opendir(dirname);
530 if (!D) {
531 td_verror(td, errno, "opendir");
532 return 1;
533 }
534
535 while ((dir = readdir(D)) != NULL) {
536 char full_path[PATH_MAX];
537 struct stat sb;
538
539 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
540 continue;
541
542 sprintf(full_path, "%s/%s", dirname, dir->d_name);
543
544 if (lstat(full_path, &sb) == -1) {
545 if (errno != ENOENT) {
546 td_verror(td, errno, "stat");
547 return 1;
548 }
549 }
550
551 if (S_ISREG(sb.st_mode)) {
552 add_file(td, full_path);
553 td->o.nr_files++;
554 continue;
555 }
556
557 if ((ret = recurse_dir(td, full_path)) != 0)
558 break;
559 }
560
561 closedir(D);
562 return ret;
563}
564
565int add_dir_files(struct thread_data *td, const char *path)
566{
567 return recurse_dir(td, path);
568}
569
570void dup_files(struct thread_data *td, struct thread_data *org)
571{
572 struct fio_file *f;
573 unsigned int i;
574 size_t bytes;
575
576 if (!org->files)
577 return;
578
579 bytes = org->files_index * sizeof(*f);
580 td->files = malloc(bytes);
581 memcpy(td->files, org->files, bytes);
582
583 for_each_file(td, f, i) {
584 if (f->file_name)
585 f->file_name = strdup(f->file_name);
586 }
587}