Commit | Line | Data |
---|---|---|
2866c82d JA |
1 | /* |
2 | * native linux aio io engine | |
3 | * | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <unistd.h> | |
8 | #include <errno.h> | |
9 | #include <assert.h> | |
10 | #include "fio.h" | |
11 | #include "os.h" | |
12 | ||
13 | #define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj) | |
14 | ||
15 | struct libaio_data { | |
16 | io_context_t aio_ctx; | |
17 | struct io_event *aio_events; | |
18 | }; | |
19 | ||
7a16dd02 | 20 | static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
2866c82d | 21 | { |
53cdc686 JA |
22 | struct fio_file *f = io_u->file; |
23 | ||
2866c82d | 24 | if (io_u->ddir == DDIR_READ) |
53cdc686 | 25 | io_prep_pread(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset); |
87dc1ab1 | 26 | else if (io_u->ddir == DDIR_WRITE) |
53cdc686 | 27 | io_prep_pwrite(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset); |
87dc1ab1 JA |
28 | else if (io_u->ddir == DDIR_SYNC) |
29 | io_prep_fsync(&io_u->iocb, f->fd); | |
30 | else | |
31 | return 1; | |
2866c82d JA |
32 | |
33 | return 0; | |
34 | } | |
35 | ||
36 | static struct io_u *fio_libaio_event(struct thread_data *td, int event) | |
37 | { | |
38 | struct libaio_data *ld = td->io_ops->data; | |
39 | ||
40 | return ev_to_iou(ld->aio_events + event); | |
41 | } | |
42 | ||
43 | static int fio_libaio_getevents(struct thread_data *td, int min, int max, | |
44 | struct timespec *t) | |
45 | { | |
46 | struct libaio_data *ld = td->io_ops->data; | |
47 | long r; | |
48 | ||
49 | do { | |
50 | r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t); | |
51 | if (r == -EAGAIN) { | |
52 | usleep(100); | |
53 | continue; | |
54 | } else if (r == -EINTR) | |
55 | continue; | |
84585003 | 56 | else if (r != 0) |
2866c82d JA |
57 | break; |
58 | } while (1); | |
59 | ||
87dc1ab1 | 60 | return (int) -r; |
2866c82d JA |
61 | } |
62 | ||
63 | static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u) | |
64 | { | |
65 | struct libaio_data *ld = td->io_ops->data; | |
66 | struct iocb *iocb = &io_u->iocb; | |
67 | long ret; | |
68 | ||
69 | do { | |
70 | ret = io_submit(ld->aio_ctx, 1, &iocb); | |
71 | if (ret == 1) | |
72 | return 0; | |
84585003 | 73 | else if (ret == -EAGAIN || !ret) |
2866c82d JA |
74 | usleep(100); |
75 | else if (ret == -EINTR) | |
76 | continue; | |
77 | else | |
78 | break; | |
79 | } while (1); | |
80 | ||
353a7e0e JA |
81 | if (ret <= 0) { |
82 | io_u->resid = io_u->buflen; | |
83 | io_u->error = -ret; | |
84 | return 1; | |
85 | } | |
2866c82d | 86 | |
353a7e0e | 87 | return 0; |
2866c82d JA |
88 | } |
89 | ||
90 | static int fio_libaio_cancel(struct thread_data *td, struct io_u *io_u) | |
91 | { | |
92 | struct libaio_data *ld = td->io_ops->data; | |
93 | ||
94 | return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events); | |
95 | } | |
96 | ||
97 | static void fio_libaio_cleanup(struct thread_data *td) | |
98 | { | |
99 | struct libaio_data *ld = td->io_ops->data; | |
100 | ||
101 | if (ld) { | |
102 | io_destroy(ld->aio_ctx); | |
103 | if (ld->aio_events) | |
104 | free(ld->aio_events); | |
105 | ||
106 | free(ld); | |
107 | td->io_ops->data = NULL; | |
108 | } | |
109 | } | |
110 | ||
111 | static int fio_libaio_init(struct thread_data *td) | |
112 | { | |
113 | struct libaio_data *ld = malloc(sizeof(*ld)); | |
114 | ||
115 | memset(ld, 0, sizeof(*ld)); | |
116 | if (io_queue_init(td->iodepth, &ld->aio_ctx)) { | |
117 | td_verror(td, errno); | |
118 | return 1; | |
119 | } | |
120 | ||
121 | ld->aio_events = malloc(td->iodepth * sizeof(struct io_event)); | |
84585003 | 122 | memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event)); |
2866c82d JA |
123 | td->io_ops->data = ld; |
124 | return 0; | |
125 | } | |
126 | ||
127 | struct ioengine_ops ioengine = { | |
128 | .name = "libaio", | |
129 | .version = FIO_IOOPS_VERSION, | |
130 | .init = fio_libaio_init, | |
131 | .prep = fio_libaio_prep, | |
132 | .queue = fio_libaio_queue, | |
133 | .cancel = fio_libaio_cancel, | |
134 | .getevents = fio_libaio_getevents, | |
135 | .event = fio_libaio_event, | |
136 | .cleanup = fio_libaio_cleanup, | |
2866c82d | 137 | }; |