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