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 ||
19 (td->io_ops->flags & FIO_DISKLESSIO))
22 if (lstat(f->file_name, &st) == -1)
26 * if it's a special file, size is always ok for now
28 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
30 if (st.st_size < (off_t) f->file_size)
36 static int create_file(struct thread_data *td, struct fio_file *f)
38 unsigned long long left;
43 f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
45 td_verror(td, errno, "open");
49 if (ftruncate(f->fd, f->file_size) == -1) {
50 td_verror(td, errno, "ftruncate");
54 if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
55 td_verror(td, errno, "posix_fallocate");
59 b = malloc(td->max_bs[DDIR_WRITE]);
60 memset(b, 0, td->max_bs[DDIR_WRITE]);
63 while (left && !td->terminate) {
64 bs = td->max_bs[DDIR_WRITE];
68 r = write(f->fd, b, bs);
75 td_verror(td, errno, "write");
77 td_verror(td, EIO, "write");
85 else if (td->create_fsync)
98 static int create_files(struct thread_data *td)
101 int i, err, need_create;
103 for_each_file(td, f, i)
104 f->file_size = td->total_file_size / td->nr_files;
107 * unless specifically asked for overwrite, let normal io extend it
113 if (td->filetype == FIO_TYPE_FILE) {
114 for_each_file(td, f, i) {
115 int file_there = !file_ok(td, f);
117 if (file_there && td_write(td) && !td->overwrite) {
118 unlink(f->file_name);
122 need_create += !file_there;
129 if (!td->total_file_size) {
130 log_err("Need size for create\n");
131 td_verror(td, EINVAL, "file_size");
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);
142 for_each_file(td, f, i) {
144 * Only unlink files that we created.
147 if (file_ok(td, f)) {
148 f->unlink = td->unlink;
149 err = create_file(td, f);
159 static int file_size(struct thread_data *td, struct fio_file *f)
164 if (fstat(f->fd, &st) == -1) {
165 td_verror(td, errno, "fstat");
169 f->real_file_size = st.st_size;
171 if (!f->file_size || f->file_size > f->real_file_size)
172 f->file_size = f->real_file_size;
174 f->real_file_size = f->file_size;
179 static int bdev_size(struct thread_data *td, struct fio_file *f)
181 unsigned long long bytes;
184 r = blockdev_size(f->fd, &bytes);
186 td_verror(td, r, "blockdev_size");
190 f->real_file_size = bytes;
193 * no extend possibilities, so limit size to device size if too large
195 if (!f->file_size || f->file_size > f->real_file_size)
196 f->file_size = f->real_file_size;
198 f->file_size -= f->file_offset;
202 static int get_file_size(struct thread_data *td, struct fio_file *f)
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);
211 f->real_file_size = -1;
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);
224 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
228 if (!td->invalidate_cache)
234 * FIXME: add blockdev flushing too
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)
246 td_verror(td, errno, "invalidate_cache");
253 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
259 int generic_open_file(struct thread_data *td, struct fio_file *f)
264 flags |= OS_O_DIRECT;
268 if (td_write(td) || td_rw(td)) {
271 if (td->filetype == FIO_TYPE_FILE) {
278 f->fd = open(f->file_name, flags, 0600);
280 if (td->filetype == FIO_TYPE_CHAR)
285 f->fd = open(f->file_name, flags);
291 td_verror(td, __e, "open");
292 if (__e == EINVAL && td->odirect)
293 log_err("fio: destination does not support O_DIRECT\n");
297 if (get_file_size(td, f))
300 if (file_invalidate_cache(td, f))
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");
309 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
310 td_verror(td, errno, "fadvise");
321 int open_files(struct thread_data *td)
326 for_each_file(td, f, i) {
327 err = td_io_open_file(td, f);
331 if (td->open_files == td->nr_open_files)
338 for_each_file(td, f, i)
339 td_io_close_file(td, f);
344 int setup_files(struct thread_data *td)
350 * if ioengine defines a setup() method, it's responsible for
351 * setting up everything in the td->files[] area.
353 if (td->io_ops->setup)
354 return td->io_ops->setup(td);
356 if (create_files(td))
359 err = open_files(td);
364 * Recalculate the total file size now that files are set up.
366 td->total_file_size = 0;
367 for_each_file(td, f, i)
368 td->total_file_size += f->file_size;
370 td->total_file_size = (td->total_file_size * td->nr_files) / td->open_files;
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");
380 td->zone_size = td->io_size;
382 td->total_io_size = td->io_size * td->loops;
384 for_each_file(td, f, i)
385 td_io_close_file(td, f);
390 void close_files(struct thread_data *td)
395 for_each_file(td, f, i) {
396 if (!td->filename && f->unlink &&
397 td->filetype == FIO_TYPE_FILE) {
398 unlink(f->file_name);
403 td_io_close_file(td, f);