678e8365432ad94b8b7bd9e41170204901f1eef7
[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 <sys/stat.h>
7 #include <sys/mman.h>
8 #include <sys/types.h>
9
10 #include "fio.h"
11 #include "os.h"
12
13 /*
14  * Check if the file exists and it's large enough.
15  */
16 static int file_ok(struct thread_data *td, struct fio_file *f)
17 {
18         struct stat st;
19
20         if (f->filetype != FIO_TYPE_FILE ||
21             (td->io_ops->flags & FIO_DISKLESSIO))
22                 return 0;
23
24         if (lstat(f->file_name, &st) == -1)
25                 return 1;
26
27         /*
28          * if it's a special file, size is always ok for now
29          */
30         if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
31                 return 0;
32         if (st.st_size < (off_t) f->file_size)
33                 return 1;
34
35         return 0;
36 }
37
38 static int create_file(struct thread_data *td, struct fio_file *f)
39 {
40         unsigned long long left;
41         unsigned int bs;
42         char *b;
43         int r;
44
45         f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
46         if (f->fd < 0) {
47                 td_verror(td, errno, "open");
48                 return 1;
49         }
50
51         if (ftruncate(f->fd, f->file_size) == -1) {
52                 td_verror(td, errno, "ftruncate");
53                 goto err;
54         }
55
56         if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
57                 td_verror(td, errno, "posix_fallocate");
58                 goto err;
59         }
60
61         b = malloc(td->max_bs[DDIR_WRITE]);
62         memset(b, 0, td->max_bs[DDIR_WRITE]);
63
64         left = f->file_size;
65         while (left && !td->terminate) {
66                 bs = td->max_bs[DDIR_WRITE];
67                 if (bs > left)
68                         bs = left;
69
70                 r = write(f->fd, b, bs);
71
72                 if (r == (int) bs) {
73                         left -= bs;
74                         continue;
75                 } else {
76                         if (r < 0)
77                                 td_verror(td, errno, "write");
78                         else
79                                 td_verror(td, EIO, "write");
80
81                         break;
82                 }
83         }
84
85         if (td->terminate)
86                 unlink(f->file_name);
87         else if (td->create_fsync)
88                 fsync(f->fd);
89
90         free(b);
91         close(f->fd);
92         f->fd = -1;
93         return 0;
94 err:
95         close(f->fd);
96         f->fd = -1;
97         return 1;
98 }
99
100 static int create_files(struct thread_data *td)
101 {
102         struct fio_file *f;
103         int err, need_create, can_extend;
104         unsigned int i;
105
106         for_each_file(td, f, i) {
107                 if (f->filetype != FIO_TYPE_FILE)
108                         continue;
109
110                 f->file_size = td->total_file_size / td->nr_normal_files;
111                 f->file_offset = td->start_offset;
112         }
113
114         /*
115          * unless specifically asked for overwrite, let normal io extend it
116          */
117         can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
118         if (can_extend)
119                 return 0;
120
121         need_create = 0;
122         for_each_file(td, f, i) {
123                 int file_there;
124
125                 if (f->filetype != FIO_TYPE_FILE)
126                         continue;
127
128                 file_there = !file_ok(td, f);
129
130                 if (file_there && td_write(td) && !td->overwrite) {
131                         unlink(f->file_name);
132                         file_there = 0;
133                 }
134
135                 need_create += !file_there;
136         }
137
138         if (!need_create)
139                 return 0;
140
141         if (!td->total_file_size) {
142                 log_err("Need size for create\n");
143                 td_verror(td, EINVAL, "file_size");
144                 return 1;
145         }
146
147         temp_stall_ts = 1;
148         fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
149                                 td->name, td->nr_normal_files,
150                                 (td->total_file_size >> 20) / td->nr_normal_files,
151                                 td->total_file_size >> 20);
152
153         err = 0;
154         for_each_file(td, f, i) {
155                 /*
156                  * Only unlink files that we created.
157                  */
158                 f->flags &= ~FIO_FILE_UNLINK;
159                 if (file_ok(td, f)) {
160                         if (td->unlink)
161                                 f->flags |= FIO_FILE_UNLINK;
162
163                         err = create_file(td, f);
164                         if (err)
165                                 break;
166                 }
167         }
168
169         temp_stall_ts = 0;
170         return err;
171 }
172
173 static int file_size(struct thread_data *td, struct fio_file *f)
174 {
175         struct stat st;
176
177         if (td->overwrite) {
178                 if (fstat(f->fd, &st) == -1) {
179                         td_verror(td, errno, "fstat");
180                         return 1;
181                 }
182
183                 f->real_file_size = st.st_size;
184
185                 if (!f->file_size || f->file_size > f->real_file_size)
186                         f->file_size = f->real_file_size;
187         } else
188                 f->real_file_size = f->file_size;
189
190         return 0;
191 }
192
193 static int bdev_size(struct thread_data *td, struct fio_file *f)
194 {
195         unsigned long long bytes;
196         int r;
197
198         r = blockdev_size(f->fd, &bytes);
199         if (r) {
200                 td_verror(td, r, "blockdev_size");
201                 return 1;
202         }
203
204         f->real_file_size = bytes;
205
206         /*
207          * no extend possibilities, so limit size to device size if too large
208          */
209         if (!f->file_size || f->file_size > f->real_file_size)
210                 f->file_size = f->real_file_size;
211
212         f->file_size -= f->file_offset;
213         return 0;
214 }
215
216 static int get_file_size(struct thread_data *td, struct fio_file *f)
217 {
218         int ret = 0;
219
220         if (f->filetype == FIO_TYPE_FILE)
221                 ret = file_size(td, f);
222         else if (f->filetype == FIO_TYPE_BD)
223                 ret = bdev_size(td, f);
224         else
225                 f->real_file_size = -1;
226
227         if (ret)
228                 return ret;
229
230         if (f->file_offset > f->real_file_size) {
231                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
232                 return 1;
233         }
234
235         return 0;
236 }
237
238 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
239 {
240         int ret = 0;
241
242         if (td->odirect)
243                 return 0;
244
245         /*
246          * FIXME: add blockdev flushing too
247          */
248         if (f->mmap)
249                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
250         else if (f->filetype == FIO_TYPE_FILE) {
251                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
252         } else if (f->filetype == FIO_TYPE_BD) {
253                 ret = blockdev_invalidate_cache(f->fd);
254         } else if (f->filetype == FIO_TYPE_CHAR)
255                 ret = 0;
256
257         if (ret < 0) {
258                 td_verror(td, errno, "invalidate_cache");
259                 return 1;
260         }
261
262         return ret;
263 }
264
265 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
266 {
267         close(f->fd);
268         f->fd = -1;
269 }
270
271 int generic_open_file(struct thread_data *td, struct fio_file *f)
272 {
273         int flags = 0;
274
275         if (td->odirect)
276                 flags |= OS_O_DIRECT;
277         if (td->sync_io)
278                 flags |= O_SYNC;
279
280         if (td_write(td) || td_rw(td)) {
281                 flags |= O_RDWR;
282
283                 if (f->filetype == FIO_TYPE_FILE)
284                         flags |= O_CREAT;
285
286                 f->fd = open(f->file_name, flags, 0600);
287         } else {
288                 if (f->filetype == FIO_TYPE_CHAR)
289                         flags |= O_RDWR;
290                 else
291                         flags |= O_RDONLY;
292
293                 f->fd = open(f->file_name, flags);
294         }
295
296         if (f->fd == -1) {
297                 int __e = errno;
298
299                 td_verror(td, __e, "open");
300                 if (__e == EINVAL && td->odirect)
301                         log_err("fio: destination does not support O_DIRECT\n");
302                 if (__e == EMFILE)
303                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
304                 return 1;
305         }
306
307         if (get_file_size(td, f))
308                 goto err;
309
310         if (td->invalidate_cache && file_invalidate_cache(td, f))
311                 goto err;
312
313         if (!td_random(td)) {
314                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
315                         td_verror(td, errno, "fadvise");
316                         goto err;
317                 }
318         } else {
319                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
320                         td_verror(td, errno, "fadvise");
321                         goto err;
322                 }
323         }
324
325         return 0;
326 err:
327         close(f->fd);
328         return 1;
329 }
330
331 int open_files(struct thread_data *td)
332 {
333         struct fio_file *f;
334         unsigned int i;
335         int err = 0;
336
337         for_each_file(td, f, i) {
338                 err = td_io_open_file(td, f);
339                 if (err)
340                         break;
341
342                 if (td->open_files == td->nr_open_files)
343                         break;
344         }
345
346         if (!err)
347                 return 0;
348
349         for_each_file(td, f, i)
350                 td_io_close_file(td, f);
351
352         return err;
353 }
354
355 int setup_files(struct thread_data *td)
356 {
357         struct fio_file *f;
358         unsigned int i;
359         int err;
360
361         /*
362          * if ioengine defines a setup() method, it's responsible for
363          * setting up everything in the td->files[] area.
364          */
365         if (td->io_ops->setup)
366                 return td->io_ops->setup(td);
367
368         if (create_files(td))
369                 return 1;
370
371         err = open_files(td);
372         if (err)
373                 return err;
374
375         /*
376          * Recalculate the total file size now that files are set up.
377          */
378         td->total_file_size = 0;
379         for_each_file(td, f, i)
380                 td->total_file_size += f->file_size;
381
382         td->io_size = td->total_file_size;
383         if (td->io_size == 0) {
384                 log_err("%s: no io blocks\n", td->name);
385                 td_verror(td, EINVAL, "total_file_size");
386                 return 1;
387         }
388
389         if (!td->zone_size)
390                 td->zone_size = td->io_size;
391
392         td->total_io_size = td->io_size * td->loops;
393
394         for_each_file(td, f, i)
395                 td_io_close_file(td, f);
396
397         return err;
398 }
399
400 void close_files(struct thread_data *td)
401 {
402         struct fio_file *f;
403         unsigned int i;
404
405         for_each_file(td, f, i) {
406                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
407                     f->filetype == FIO_TYPE_FILE) {
408                         unlink(f->file_name);
409                         free(f->file_name);
410                         f->file_name = NULL;
411                 }
412
413                 td_io_close_file(td, f);
414
415                 if (f->file_map)
416                         free(f->file_map);
417         }
418
419         td->filename = NULL;
420         free(td->files);
421         td->files = NULL;
422         td->nr_files = 0;
423 }
424
425 static void get_file_type(struct fio_file *f)
426 {
427         struct stat sb;
428
429         f->filetype = FIO_TYPE_FILE;
430
431         if (!lstat(f->file_name, &sb)) {
432                 if (S_ISBLK(sb.st_mode))
433                         f->filetype = FIO_TYPE_BD;
434                 else if (S_ISCHR(sb.st_mode))
435                         f->filetype = FIO_TYPE_CHAR;
436         }
437 }
438
439 void add_file(struct thread_data *td, const char *fname)
440 {
441         int cur_files = td->files_index;
442         struct fio_file *f;
443
444         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
445
446         f = &td->files[cur_files];
447         memset(f, 0, sizeof(*f));
448         f->fd = -1;
449         f->file_name = strdup(fname);
450
451         get_file_type(f);
452
453         td->files_index++;
454         if (f->filetype == FIO_TYPE_FILE)
455                 td->nr_normal_files++;
456 }
457
458 void get_file(struct fio_file *f)
459 {
460         f->references++;
461 }
462
463 void put_file(struct thread_data *td, struct fio_file *f)
464 {
465         if (!(f->flags & FIO_FILE_OPEN))
466                 return;
467
468         assert(f->references);
469         if (--f->references)
470                 return;
471
472         if (should_fsync(td) && td->fsync_on_close)
473                 fsync(f->fd);
474
475         if (td->io_ops->close_file)
476                 td->io_ops->close_file(td, f);
477         td->nr_open_files--;
478         f->flags &= ~FIO_FILE_OPEN;
479 }
480
481 static int recurse_dir(struct thread_data *td, const char *dirname)
482 {
483         struct dirent *dir;
484         int ret = 0;
485         DIR *D;
486
487         D = opendir(dirname);
488         if (!D) {
489                 td_verror(td, errno, "opendir");
490                 return 1;
491         }
492
493         while ((dir = readdir(D)) != NULL) {
494                 char full_path[PATH_MAX];
495                 struct stat sb;
496
497                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
498
499                 if (lstat(full_path, &sb) == -1) {
500                         if (errno != ENOENT) {
501                                 td_verror(td, errno, "stat");
502                                 return 1;
503                         }
504                 }
505
506                 if (S_ISREG(sb.st_mode)) {
507                         add_file(td, full_path);
508                         td->nr_files++;
509                         continue;
510                 }
511
512                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
513                         continue;
514
515                 if ((ret = recurse_dir(td, full_path)) != 0)
516                         break;
517         }
518
519         closedir(D);
520         return ret;
521 }
522
523 int add_dir_files(struct thread_data *td, const char *path)
524 {
525         return recurse_dir(td, path);
526 }