[PATCH] Add seperate read/write block size options
[fio.git] / filesetup.c
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1#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <assert.h>
5#include <sys/stat.h>
6#include <sys/mman.h>
7
8#include "fio.h"
9#include "os.h"
10
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11/*
12 * Check if the file exists and it's large enough.
13 */
14static int file_ok(struct thread_data *td, struct fio_file *f)
53cdc686 15{
b2a15192 16 struct stat st;
53cdc686 17
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18 if (td->filetype != FIO_TYPE_FILE)
19 return 0;
20
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21 if (stat(f->file_name, &st) == -1)
22 return 1;
23 else if (st.st_size < (off_t) f->file_size)
24 return 1;
25
26 return 0;
27}
28
29static int create_file(struct thread_data *td, struct fio_file *f)
30{
31 unsigned long long left;
32 unsigned int bs;
33 char *b;
34 int r;
b2a15192 35
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36 f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
37 if (f->fd < 0) {
38 td_verror(td, errno);
39 return 1;
40 }
41
42 if (ftruncate(f->fd, f->file_size) == -1) {
43 td_verror(td, errno);
44 goto err;
45 }
46
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47 if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
48 td_verror(td, errno);
49 goto err;
50 }
51
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52 b = malloc(td->max_bs[DDIR_WRITE]);
53 memset(b, 0, td->max_bs[DDIR_WRITE]);
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54
55 left = f->file_size;
56 while (left && !td->terminate) {
a00735e6 57 bs = td->max_bs[DDIR_WRITE];
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58 if (bs > left)
59 bs = left;
60
61 r = write(f->fd, b, bs);
62
63 if (r == (int) bs) {
64 left -= bs;
65 continue;
66 } else {
67 if (r < 0)
68 td_verror(td, errno);
69 else
70 td_verror(td, EIO);
71
72 break;
73 }
74 }
75
76 if (td->terminate)
77 unlink(f->file_name);
78 else if (td->create_fsync)
79 fsync(f->fd);
80
81 free(b);
82 close(f->fd);
83 f->fd = -1;
84 return 0;
85err:
86 close(f->fd);
87 f->fd = -1;
88 return 1;
89}
90
91static int create_files(struct thread_data *td)
92{
93 struct fio_file *f;
25205e97 94 int i, err, need_create;
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95
96 /*
97 * unless specifically asked for overwrite, let normal io extend it
98 */
99 if (!td->overwrite) {
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100 for_each_file(td, f, i)
101 f->file_size = td->total_file_size / td->nr_files;
102
103 return 0;
104 }
105
25205e97 106 need_create = 0;
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107 if (td->filetype == FIO_TYPE_FILE)
108 for_each_file(td, f, i)
f1027063 109 need_create += file_ok(td, f);
25205e97 110
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111 if (!need_create)
112 return 0;
113
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114 if (!td->total_file_size) {
115 log_err("Need size for create\n");
116 td_verror(td, EINVAL);
117 return 1;
118 }
119
53cdc686 120 temp_stall_ts = 1;
25205e97 121 fprintf(f_out, "%s: Laying out IO file(s) (%d x %LuMiB == %LuMiB)\n",
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122 td->name, td->nr_uniq_files,
123 (td->total_file_size >> 20) / td->nr_uniq_files,
25205e97 124 td->total_file_size >> 20);
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125
126 err = 0;
127 for_each_file(td, f, i) {
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128 if (file_ok(td, f)) {
129 err = create_file(td, f);
130 if (err)
131 break;
132 }
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133 }
134
135 temp_stall_ts = 0;
136 return err;
137}
138
139static int file_size(struct thread_data *td, struct fio_file *f)
140{
141 struct stat st;
142
143 if (td->overwrite) {
144 if (fstat(f->fd, &st) == -1) {
145 td_verror(td, errno);
146 return 1;
147 }
148
149 f->real_file_size = st.st_size;
150
151 if (!f->file_size || f->file_size > f->real_file_size)
152 f->file_size = f->real_file_size;
153 }
154
155 f->file_size -= f->file_offset;
156 return 0;
157}
158
159static int bdev_size(struct thread_data *td, struct fio_file *f)
160{
161 unsigned long long bytes;
162 int r;
163
164 r = blockdev_size(f->fd, &bytes);
165 if (r) {
166 td_verror(td, r);
167 return 1;
168 }
169
170 f->real_file_size = bytes;
171
172 /*
173 * no extend possibilities, so limit size to device size if too large
174 */
175 if (!f->file_size || f->file_size > f->real_file_size)
176 f->file_size = f->real_file_size;
177
178 f->file_size -= f->file_offset;
179 return 0;
180}
181
182static int get_file_size(struct thread_data *td, struct fio_file *f)
183{
184 int ret = 0;
185
186 if (td->filetype == FIO_TYPE_FILE)
187 ret = file_size(td, f);
188 else if (td->filetype == FIO_TYPE_BD)
189 ret = bdev_size(td, f);
190 else
191 f->real_file_size = -1;
192
193 if (ret)
194 return ret;
195
196 if (f->file_offset > f->real_file_size) {
197 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
198 return 1;
199 }
200
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201 return 0;
202}
203
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204int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
205{
206 int ret = 0;
207
208 /*
209 * FIXME: add blockdev flushing too
210 */
211 if (td->io_ops->flags & FIO_MMAPIO)
212 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
213 else if (td->filetype == FIO_TYPE_FILE)
214 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
215 else if (td->filetype == FIO_TYPE_BD)
216 ret = blockdev_invalidate_cache(f->fd);
217 else if (td->filetype == FIO_TYPE_CHAR)
218 ret = 0;
219
220 if (ret < 0) {
221 td_verror(td, errno);
222 return 1;
223 }
224
225 return 0;
226}
227
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228static int __setup_file_mmap(struct thread_data *td, struct fio_file *f)
229{
230 int flags;
231
232 if (td_rw(td))
233 flags = PROT_READ | PROT_WRITE;
234 else if (td_write(td)) {
235 flags = PROT_WRITE;
236
237 if (td->verify != VERIFY_NONE)
238 flags |= PROT_READ;
239 } else
240 flags = PROT_READ;
241
242 f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset);
243 if (f->mmap == MAP_FAILED) {
244 f->mmap = NULL;
245 td_verror(td, errno);
246 return 1;
247 }
248
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249 if (td->invalidate_cache && file_invalidate_cache(td, f))
250 return 1;
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251
252 if (td->sequential) {
253 if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
254 td_verror(td, errno);
255 return 1;
256 }
257 } else {
258 if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) {
259 td_verror(td, errno);
260 return 1;
261 }
262 }
263
264 return 0;
265}
266
267static int setup_files_mmap(struct thread_data *td)
268{
269 struct fio_file *f;
270 int i, err = 0;
271
272 for_each_file(td, f, i) {
273 err = __setup_file_mmap(td, f);
274 if (err)
275 break;
276 }
277
278 return err;
279}
280
281static int __setup_file_plain(struct thread_data *td, struct fio_file *f)
282{
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283 if (td->invalidate_cache && file_invalidate_cache(td, f))
284 return 1;
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285
286 if (td->sequential) {
287 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
288 td_verror(td, errno);
289 return 1;
290 }
291 } else {
292 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
293 td_verror(td, errno);
294 return 1;
295 }
296 }
297
298 return 0;
299}
300
301static int setup_files_plain(struct thread_data *td)
302{
303 struct fio_file *f;
304 int i, err = 0;
305
306 for_each_file(td, f, i) {
307 err = __setup_file_plain(td, f);
308 if (err)
309 break;
310 }
311
312 return err;
313}
314
315static int setup_file(struct thread_data *td, struct fio_file *f)
316{
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317 int flags = 0;
318
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319 if (td->odirect)
320 flags |= OS_O_DIRECT;
321
322 if (td_write(td) || td_rw(td)) {
323 if (td->filetype == FIO_TYPE_FILE) {
324 if (!td->overwrite)
325 flags |= O_TRUNC;
326
327 flags |= O_CREAT;
328 }
329 if (td->sync_io)
330 flags |= O_SYNC;
331
332 flags |= O_RDWR;
333
334 f->fd = open(f->file_name, flags, 0600);
335 } else {
336 if (td->filetype == FIO_TYPE_CHAR)
337 flags |= O_RDWR;
338 else
339 flags |= O_RDONLY;
340
341 f->fd = open(f->file_name, flags);
342 }
343
344 if (f->fd == -1) {
345 td_verror(td, errno);
346 return 1;
347 }
348
349 if (get_file_size(td, f))
350 return 1;
351
352 return 0;
353}
354
355int setup_files(struct thread_data *td)
356{
357 struct fio_file *f;
358 int i, err;
359
360 /*
361 * if ioengine defines a setup() method, it's responsible for
362 * setting up everything in the td->files[] area.
363 */
364 if (td->io_ops->setup)
365 return td->io_ops->setup(td);
366
367 if (create_files(td))
368 return 1;
369
f1027063 370 err = 0;
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371 for_each_file(td, f, i) {
372 err = setup_file(td, f);
373 if (err)
374 break;
375 }
376
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377 if (err)
378 return err;
379
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380 /*
381 * Recalculate the total file size now that files are set up.
382 */
383 td->total_file_size = 0;
384 for_each_file(td, f, i)
385 td->total_file_size += f->file_size;
386
f1027063 387 td->io_size = td->total_file_size;
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388 if (td->io_size == 0) {
389 log_err("%s: no io blocks\n", td->name);
390 td_verror(td, EINVAL);
391 return 1;
392 }
393
394 if (!td->zone_size)
395 td->zone_size = td->io_size;
396
397 td->total_io_size = td->io_size * td->loops;
398
399 if (td->io_ops->flags & FIO_MMAPIO)
400 return setup_files_mmap(td);
401 else
402 return setup_files_plain(td);
403}
404
405void close_files(struct thread_data *td)
406{
0ab8db89 407 struct fio_file *f;
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408 int i;
409
0ab8db89 410 for_each_file(td, f, i) {
53cdc686 411 if (f->fd != -1) {
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412 if (td->unlink && td->filetype == FIO_TYPE_FILE &&
413 td->filename) {
f6cbb269 414 unlink(f->file_name);
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415 td->filename = NULL;
416 }
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417 free(f->file_name);
418 f->file_name = NULL;
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419 close(f->fd);
420 f->fd = -1;
421 }
422 if (f->mmap) {
423 munmap(f->mmap, f->file_size);
424 f->mmap = NULL;
425 }
426 }
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427
428 free(td->files);
429 td->files = NULL;
430 td->nr_files = 0;
53cdc686 431}