12 * Check if the file exists and it's large enough.
14 static int file_ok(struct thread_data *td, struct fio_file *f)
18 if (td->filetype != FIO_TYPE_FILE)
21 if (stat(f->file_name, &st) == -1)
23 else if (st.st_size < (off_t) f->file_size)
29 static int create_file(struct thread_data *td, struct fio_file *f)
31 unsigned long long left;
36 f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
42 if (ftruncate(f->fd, f->file_size) == -1) {
47 if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
52 b = malloc(td->max_bs[DDIR_WRITE]);
53 memset(b, 0, td->max_bs[DDIR_WRITE]);
56 while (left && !td->terminate) {
57 bs = td->max_bs[DDIR_WRITE];
61 r = write(f->fd, b, bs);
78 else if (td->create_fsync)
91 static int create_files(struct thread_data *td)
94 int i, err, need_create;
96 for_each_file(td, f, i)
97 f->file_size = td->total_file_size / td->nr_files;
100 * unless specifically asked for overwrite, let normal io extend it
106 if (td->filetype == FIO_TYPE_FILE) {
107 for_each_file(td, f, i) {
108 int file_there = !file_ok(td, f);
110 if (file_there && td->ddir == DDIR_WRITE &&
112 unlink(f->file_name);
116 need_create += !file_there;
123 if (!td->total_file_size) {
124 log_err("Need size for create\n");
125 td_verror(td, EINVAL);
130 fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
131 td->name, td->nr_uniq_files,
132 (td->total_file_size >> 20) / td->nr_uniq_files,
133 td->total_file_size >> 20);
136 for_each_file(td, f, i) {
138 * Only unlink files that we created.
141 if (file_ok(td, f)) {
142 f->unlink = td->unlink;
143 err = create_file(td, f);
153 static int file_size(struct thread_data *td, struct fio_file *f)
158 if (fstat(f->fd, &st) == -1) {
159 td_verror(td, errno);
163 f->real_file_size = st.st_size;
165 if (!f->file_size || f->file_size > f->real_file_size)
166 f->file_size = f->real_file_size;
168 f->real_file_size = f->file_size;
173 static int bdev_size(struct thread_data *td, struct fio_file *f)
175 unsigned long long bytes;
178 r = blockdev_size(f->fd, &bytes);
184 f->real_file_size = bytes;
187 * no extend possibilities, so limit size to device size if too large
189 if (!f->file_size || f->file_size > f->real_file_size)
190 f->file_size = f->real_file_size;
192 f->file_size -= f->file_offset;
196 static int get_file_size(struct thread_data *td, struct fio_file *f)
200 if (td->filetype == FIO_TYPE_FILE)
201 ret = file_size(td, f);
202 else if (td->filetype == FIO_TYPE_BD)
203 ret = bdev_size(td, f);
205 f->real_file_size = -1;
210 if (f->file_offset > f->real_file_size) {
211 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
218 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
223 * FIXME: add blockdev flushing too
225 if (td->io_ops->flags & FIO_MMAPIO)
226 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
227 else if (td->filetype == FIO_TYPE_FILE)
228 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
229 else if (td->filetype == FIO_TYPE_BD)
230 ret = blockdev_invalidate_cache(f->fd);
231 else if (td->filetype == FIO_TYPE_CHAR)
235 td_verror(td, errno);
242 static int __setup_file_mmap(struct thread_data *td, struct fio_file *f)
247 flags = PROT_READ | PROT_WRITE;
248 else if (td_write(td)) {
251 if (td->verify != VERIFY_NONE)
256 f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset);
257 if (f->mmap == MAP_FAILED) {
259 td_verror(td, errno);
263 if (td->invalidate_cache && file_invalidate_cache(td, f))
266 if (td->sequential) {
267 if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
268 td_verror(td, errno);
272 if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) {
273 td_verror(td, errno);
281 static int setup_files_mmap(struct thread_data *td)
286 for_each_file(td, f, i) {
287 err = __setup_file_mmap(td, f);
295 static int __setup_file_plain(struct thread_data *td, struct fio_file *f)
297 if (td->invalidate_cache && file_invalidate_cache(td, f))
300 if (td->sequential) {
301 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
302 td_verror(td, errno);
306 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
307 td_verror(td, errno);
315 static int setup_files_plain(struct thread_data *td)
320 for_each_file(td, f, i) {
321 err = __setup_file_plain(td, f);
329 static int setup_file(struct thread_data *td, struct fio_file *f)
334 flags |= OS_O_DIRECT;
338 if (td_write(td) || td_rw(td)) {
341 if (td->filetype == FIO_TYPE_FILE) {
348 f->fd = open(f->file_name, flags, 0600);
350 if (td->filetype == FIO_TYPE_CHAR)
355 f->fd = open(f->file_name, flags);
359 td_verror(td, errno);
363 if (get_file_size(td, f))
369 int open_files(struct thread_data *td)
374 for_each_file(td, f, i) {
375 err = setup_file(td, f);
383 for_each_file(td, f, i) {
393 int setup_files(struct thread_data *td)
399 * if ioengine defines a setup() method, it's responsible for
400 * setting up everything in the td->files[] area.
402 if (td->io_ops->setup)
403 return td->io_ops->setup(td);
405 if (create_files(td))
408 err = open_files(td);
413 * Recalculate the total file size now that files are set up.
415 td->total_file_size = 0;
416 for_each_file(td, f, i)
417 td->total_file_size += f->file_size;
419 td->io_size = td->total_file_size;
420 if (td->io_size == 0) {
421 log_err("%s: no io blocks\n", td->name);
422 td_verror(td, EINVAL);
427 td->zone_size = td->io_size;
429 td->total_io_size = td->io_size * td->loops;
431 if (td->io_ops->flags & FIO_MMAPIO)
432 err = setup_files_mmap(td);
434 err = setup_files_plain(td);
436 for_each_file(td, f, i) {
446 void close_files(struct thread_data *td)
451 for_each_file(td, f, i) {
452 if (!td->filename && f->unlink &&
453 td->filetype == FIO_TYPE_FILE) {
454 unlink(f->file_name);
463 munmap(f->mmap, f->file_size);