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