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 need_create += file_ok(td, f);
113 if (!td->total_file_size) {
114 log_err("Need size for create\n");
115 td_verror(td, EINVAL);
120 fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
121 td->name, td->nr_uniq_files,
122 (td->total_file_size >> 20) / td->nr_uniq_files,
123 td->total_file_size >> 20);
126 for_each_file(td, f, i) {
128 * Only unlink files that we created.
131 if (file_ok(td, f)) {
132 f->unlink = td->unlink;
133 err = create_file(td, f);
143 static int file_size(struct thread_data *td, struct fio_file *f)
148 if (fstat(f->fd, &st) == -1) {
149 td_verror(td, errno);
153 f->real_file_size = st.st_size;
155 if (!f->file_size || f->file_size > f->real_file_size)
156 f->file_size = f->real_file_size;
158 f->real_file_size = f->file_size;
163 static int bdev_size(struct thread_data *td, struct fio_file *f)
165 unsigned long long bytes;
168 r = blockdev_size(f->fd, &bytes);
174 f->real_file_size = bytes;
177 * no extend possibilities, so limit size to device size if too large
179 if (!f->file_size || f->file_size > f->real_file_size)
180 f->file_size = f->real_file_size;
182 f->file_size -= f->file_offset;
186 static int get_file_size(struct thread_data *td, struct fio_file *f)
190 if (td->filetype == FIO_TYPE_FILE)
191 ret = file_size(td, f);
192 else if (td->filetype == FIO_TYPE_BD)
193 ret = bdev_size(td, f);
195 f->real_file_size = -1;
200 if (f->file_offset > f->real_file_size) {
201 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
208 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
213 * FIXME: add blockdev flushing too
215 if (td->io_ops->flags & FIO_MMAPIO)
216 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
217 else if (td->filetype == FIO_TYPE_FILE)
218 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
219 else if (td->filetype == FIO_TYPE_BD)
220 ret = blockdev_invalidate_cache(f->fd);
221 else if (td->filetype == FIO_TYPE_CHAR)
225 td_verror(td, errno);
232 static int __setup_file_mmap(struct thread_data *td, struct fio_file *f)
237 flags = PROT_READ | PROT_WRITE;
238 else if (td_write(td)) {
241 if (td->verify != VERIFY_NONE)
246 f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset);
247 if (f->mmap == MAP_FAILED) {
249 td_verror(td, errno);
253 if (td->invalidate_cache && file_invalidate_cache(td, f))
256 if (td->sequential) {
257 if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
258 td_verror(td, errno);
262 if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) {
263 td_verror(td, errno);
271 static int setup_files_mmap(struct thread_data *td)
276 for_each_file(td, f, i) {
277 err = __setup_file_mmap(td, f);
285 static int __setup_file_plain(struct thread_data *td, struct fio_file *f)
287 if (td->invalidate_cache && file_invalidate_cache(td, f))
290 if (td->sequential) {
291 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
292 td_verror(td, errno);
296 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
297 td_verror(td, errno);
305 static int setup_files_plain(struct thread_data *td)
310 for_each_file(td, f, i) {
311 err = __setup_file_plain(td, f);
319 static int setup_file(struct thread_data *td, struct fio_file *f)
324 flags |= OS_O_DIRECT;
328 if (td_write(td) || td_rw(td)) {
331 if (td->filetype == FIO_TYPE_FILE) {
338 f->fd = open(f->file_name, flags, 0600);
340 if (td->filetype == FIO_TYPE_CHAR)
345 f->fd = open(f->file_name, flags);
349 td_verror(td, errno);
353 if (get_file_size(td, f))
359 int open_files(struct thread_data *td)
364 for_each_file(td, f, i) {
365 err = setup_file(td, f);
373 for_each_file(td, f, i) {
383 int setup_files(struct thread_data *td)
389 * if ioengine defines a setup() method, it's responsible for
390 * setting up everything in the td->files[] area.
392 if (td->io_ops->setup)
393 return td->io_ops->setup(td);
395 if (create_files(td))
398 err = open_files(td);
403 * Recalculate the total file size now that files are set up.
405 td->total_file_size = 0;
406 for_each_file(td, f, i)
407 td->total_file_size += f->file_size;
409 td->io_size = td->total_file_size;
410 if (td->io_size == 0) {
411 log_err("%s: no io blocks\n", td->name);
412 td_verror(td, EINVAL);
417 td->zone_size = td->io_size;
419 td->total_io_size = td->io_size * td->loops;
421 if (td->io_ops->flags & FIO_MMAPIO)
422 err = setup_files_mmap(td);
424 err = setup_files_plain(td);
426 for_each_file(td, f, i) {
436 void close_files(struct thread_data *td)
441 for_each_file(td, f, i) {
442 if (!td->filename && f->unlink &&
443 td->filetype == FIO_TYPE_FILE) {
444 unlink(f->file_name);
453 munmap(f->mmap, f->file_size);