projects / fio.git / blame
| Commit | Line | Data |
|---|---|---|
| a467027e DM |
1 | /* |
| 2 | * ftruncate: ioengine for git://git.kernel.dk/fio.git | |
| 3 | * | |
| 4 | * IO engine that does regular truncates to simulate data transfer | |
| 5 | * as fio ioengine. | |
| 6 | * DDIR_WRITE does ftruncate | |
| 7 | * | |
| 8 | */ | |
| 9 | #include <stdio.h> | |
| 10 | #include <stdlib.h> | |
| 11 | #include <unistd.h> | |
| 12 | #include <sys/uio.h> | |
| 13 | #include <errno.h> | |
| 14 | #include <assert.h> | |
| 15 | #include <fcntl.h> | |
| 16 | ||
| 17 | #include "../fio.h" | |
| 18 | #include "../filehash.h" | |
| 19 | ||
| 20 | static int fio_ftruncate_queue(struct thread_data *td, struct io_u *io_u) | |
| 21 | { | |
| 22 | struct fio_file *f = io_u->file; | |
| 23 | int ret; | |
| 24 | fio_ro_check(td, io_u); | |
| 25 | ||
| 26 | if (io_u->ddir != DDIR_WRITE) { | |
| 27 | io_u->error = EINVAL; | |
| 28 | return FIO_Q_COMPLETED; | |
| 29 | } | |
| 30 | ret = ftruncate(f->fd, io_u->offset); | |
| 31 | ||
| 32 | if (ret) | |
| 33 | io_u->error = errno; | |
| 34 | ||
| 35 | return FIO_Q_COMPLETED; | |
| 36 | } | |
| 37 | ||
| 38 | static struct ioengine_ops ioengine = { | |
| 39 | .name = "ftruncate", | |
| 40 | .version = FIO_IOOPS_VERSION, | |
| 41 | .queue = fio_ftruncate_queue, | |
| 42 | .open_file = generic_open_file, | |
| 43 | .close_file = generic_close_file, | |
| 44 | .get_file_size = generic_get_file_size, | |
| 45 | .flags = FIO_SYNCIO | FIO_FAKEIO | |
| 46 | }; | |
| 47 | ||
| 48 | static void fio_init fio_syncio_register(void) | |
| 49 | { | |
| 50 | register_ioengine(&ioengine); | |
| 51 | } | |
| 52 | ||
| 53 | static void fio_exit fio_syncio_unregister(void) | |
| 54 | { | |
| 55 | unregister_ioengine(&ioengine); | |
| 56 | } |