cc47f094 |
1 | /* |
2 | * glusterfs engine |
3 | * |
4 | * IO engine using Glusterfs's gfapi sync interface |
5 | * |
6 | */ |
7 | |
8 | #include "gfapi.h" |
9 | |
10 | #define LAST_POS(f) ((f)->engine_data) |
11 | static int fio_gf_prep(struct thread_data *td, struct io_u *io_u) |
12 | { |
13 | struct fio_file *f = io_u->file; |
14 | struct gf_data *g = td->io_ops->data; |
15 | |
16 | dprint(FD_FILE, "fio prep\n"); |
17 | |
18 | if (!ddir_rw(io_u->ddir)) |
19 | return 0; |
20 | |
21 | if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset) |
22 | return 0; |
23 | |
24 | if (glfs_lseek(g->fd, io_u->offset, SEEK_SET) < 0) { |
25 | td_verror(td, errno, "lseek"); |
26 | return 1; |
27 | } |
28 | |
29 | return 0; |
30 | } |
31 | |
32 | static int fio_gf_queue(struct thread_data *td, struct io_u *io_u) |
33 | { |
34 | struct gf_data *g = td->io_ops->data; |
35 | int ret = 0; |
36 | |
37 | dprint(FD_FILE, "fio queue len %lu\n", io_u->xfer_buflen); |
38 | fio_ro_check(td, io_u); |
39 | |
40 | if (io_u->ddir == DDIR_READ) |
41 | ret = glfs_read(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0); |
42 | else if (io_u->ddir == DDIR_WRITE) |
43 | ret = glfs_write(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0); |
44 | else { |
45 | log_err("unsupported operation.\n"); |
46 | return -EINVAL; |
47 | } |
48 | dprint(FD_FILE, "fio len %lu ret %d\n", io_u->xfer_buflen, ret); |
49 | if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir)) |
50 | LAST_POS(io_u->file) = io_u->offset + ret; |
51 | |
52 | if (ret != (int) io_u->xfer_buflen) { |
53 | if (ret >= 0) { |
54 | io_u->resid = io_u->xfer_buflen - ret; |
55 | io_u->error = 0; |
56 | return FIO_Q_COMPLETED; |
57 | } else |
58 | io_u->error = errno; |
59 | } |
60 | |
61 | if (io_u->error){ |
62 | log_err("IO failed.\n"); |
63 | td_verror(td, io_u->error, "xfer"); |
64 | } |
65 | |
66 | return FIO_Q_COMPLETED; |
67 | |
68 | } |
69 | |
70 | static struct ioengine_ops ioengine = { |
71 | .name = "gfapi", |
72 | .version = FIO_IOOPS_VERSION, |
73 | .init = fio_gf_setup, |
74 | .cleanup = fio_gf_cleanup, |
75 | .prep = fio_gf_prep, |
76 | .queue = fio_gf_queue, |
77 | .open_file = fio_gf_open_file, |
78 | .close_file = fio_gf_close_file, |
79 | .get_file_size = fio_gf_get_file_size, |
80 | .options = gfapi_options, |
81 | .option_struct_size = sizeof(struct gf_options), |
82 | .flags = FIO_SYNCIO | FIO_DISKLESSIO, |
83 | }; |
84 | |
85 | static void fio_init fio_gf_register(void) |
86 | { |
87 | register_ioengine(&ioengine); |
88 | } |
89 | |
90 | static void fio_exit fio_gf_unregister(void) |
91 | { |
92 | unregister_ioengine(&ioengine); |
93 | } |