Commit | Line | Data |
---|---|---|
2866c82d JA |
1 | /* |
2 | * regular read/write sync io engine | |
3 | * | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <unistd.h> | |
8 | #include <errno.h> | |
9 | #include <assert.h> | |
5f350952 JA |
10 | |
11 | #include "../fio.h" | |
12 | #include "../os.h" | |
2866c82d | 13 | |
2866c82d JA |
14 | static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u) |
15 | { | |
53cdc686 JA |
16 | struct fio_file *f = io_u->file; |
17 | ||
87dc1ab1 JA |
18 | if (io_u->ddir == DDIR_SYNC) |
19 | return 0; | |
02bcaa8c JA |
20 | if (io_u->offset == f->last_completed_pos) |
21 | return 0; | |
87dc1ab1 | 22 | |
53cdc686 | 23 | if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) { |
e1161c32 | 24 | td_verror(td, errno, "lseek"); |
2866c82d JA |
25 | return 1; |
26 | } | |
27 | ||
28 | return 0; | |
29 | } | |
30 | ||
31 | static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u) | |
32 | { | |
53cdc686 | 33 | struct fio_file *f = io_u->file; |
cec6b55d | 34 | int ret; |
2866c82d JA |
35 | |
36 | if (io_u->ddir == DDIR_READ) | |
cec6b55d | 37 | ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen); |
87dc1ab1 | 38 | else if (io_u->ddir == DDIR_WRITE) |
cec6b55d | 39 | ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen); |
87dc1ab1 JA |
40 | else |
41 | ret = fsync(f->fd); | |
2866c82d | 42 | |
cec6b55d | 43 | if (ret != (int) io_u->xfer_buflen) { |
22819ec2 | 44 | if (ret >= 0) { |
cec6b55d JA |
45 | io_u->resid = io_u->xfer_buflen - ret; |
46 | io_u->error = 0; | |
36167d82 | 47 | return FIO_Q_COMPLETED; |
2866c82d JA |
48 | } else |
49 | io_u->error = errno; | |
50 | } | |
51 | ||
36167d82 | 52 | if (io_u->error) |
e1161c32 | 53 | td_verror(td, io_u->error, "xfer"); |
2866c82d | 54 | |
36167d82 | 55 | return FIO_Q_COMPLETED; |
2866c82d JA |
56 | } |
57 | ||
5f350952 | 58 | static struct ioengine_ops ioengine = { |
2866c82d JA |
59 | .name = "sync", |
60 | .version = FIO_IOOPS_VERSION, | |
2866c82d JA |
61 | .prep = fio_syncio_prep, |
62 | .queue = fio_syncio_queue, | |
b5af8293 JA |
63 | .open_file = generic_open_file, |
64 | .close_file = generic_close_file, | |
2866c82d JA |
65 | .flags = FIO_SYNCIO, |
66 | }; | |
5f350952 JA |
67 | |
68 | static void fio_init fio_syncio_register(void) | |
69 | { | |
70 | register_ioengine(&ioengine); | |
71 | } | |
72 | ||
73 | static void fio_exit fio_syncio_unregister(void) | |
74 | { | |
75 | unregister_ioengine(&ioengine); | |
76 | } |