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