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 | } |