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 | ||
34cfcdaf JA |
13 | #ifdef FIO_HAVE_LIBAIO |
14 | ||
2866c82d JA |
15 | #define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj) |
16 | ||
17 | struct libaio_data { | |
18 | io_context_t aio_ctx; | |
19 | struct io_event *aio_events; | |
20 | }; | |
21 | ||
7a16dd02 | 22 | static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
2866c82d | 23 | { |
53cdc686 JA |
24 | struct fio_file *f = io_u->file; |
25 | ||
2866c82d | 26 | if (io_u->ddir == DDIR_READ) |
53cdc686 | 27 | io_prep_pread(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset); |
87dc1ab1 | 28 | else if (io_u->ddir == DDIR_WRITE) |
53cdc686 | 29 | io_prep_pwrite(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset); |
87dc1ab1 JA |
30 | else if (io_u->ddir == DDIR_SYNC) |
31 | io_prep_fsync(&io_u->iocb, f->fd); | |
32 | else | |
33 | return 1; | |
2866c82d JA |
34 | |
35 | return 0; | |
36 | } | |
37 | ||
38 | static struct io_u *fio_libaio_event(struct thread_data *td, int event) | |
39 | { | |
40 | struct libaio_data *ld = td->io_ops->data; | |
41 | ||
42 | return ev_to_iou(ld->aio_events + event); | |
43 | } | |
44 | ||
45 | static int fio_libaio_getevents(struct thread_data *td, int min, int max, | |
46 | struct timespec *t) | |
47 | { | |
48 | struct libaio_data *ld = td->io_ops->data; | |
49 | long r; | |
50 | ||
51 | do { | |
52 | r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t); | |
53 | if (r == -EAGAIN) { | |
54 | usleep(100); | |
55 | continue; | |
56 | } else if (r == -EINTR) | |
57 | continue; | |
84585003 | 58 | else if (r != 0) |
2866c82d JA |
59 | break; |
60 | } while (1); | |
61 | ||
eaf09db4 JA |
62 | if (r < 0) |
63 | r = -r; | |
64 | ||
65 | return (int) r; | |
2866c82d JA |
66 | } |
67 | ||
68 | static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u) | |
69 | { | |
70 | struct libaio_data *ld = td->io_ops->data; | |
71 | struct iocb *iocb = &io_u->iocb; | |
72 | long ret; | |
73 | ||
74 | do { | |
75 | ret = io_submit(ld->aio_ctx, 1, &iocb); | |
76 | if (ret == 1) | |
77 | return 0; | |
84585003 | 78 | else if (ret == -EAGAIN || !ret) |
2866c82d JA |
79 | usleep(100); |
80 | else if (ret == -EINTR) | |
81 | continue; | |
82 | else | |
83 | break; | |
84 | } while (1); | |
85 | ||
353a7e0e JA |
86 | if (ret <= 0) { |
87 | io_u->resid = io_u->buflen; | |
88 | io_u->error = -ret; | |
89 | return 1; | |
90 | } | |
2866c82d | 91 | |
353a7e0e | 92 | return 0; |
2866c82d JA |
93 | } |
94 | ||
95 | static int fio_libaio_cancel(struct thread_data *td, struct io_u *io_u) | |
96 | { | |
97 | struct libaio_data *ld = td->io_ops->data; | |
98 | ||
99 | return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events); | |
100 | } | |
101 | ||
102 | static void fio_libaio_cleanup(struct thread_data *td) | |
103 | { | |
104 | struct libaio_data *ld = td->io_ops->data; | |
105 | ||
106 | if (ld) { | |
107 | io_destroy(ld->aio_ctx); | |
108 | if (ld->aio_events) | |
109 | free(ld->aio_events); | |
110 | ||
111 | free(ld); | |
112 | td->io_ops->data = NULL; | |
113 | } | |
114 | } | |
115 | ||
116 | static int fio_libaio_init(struct thread_data *td) | |
117 | { | |
118 | struct libaio_data *ld = malloc(sizeof(*ld)); | |
119 | ||
120 | memset(ld, 0, sizeof(*ld)); | |
121 | if (io_queue_init(td->iodepth, &ld->aio_ctx)) { | |
122 | td_verror(td, errno); | |
123 | return 1; | |
124 | } | |
125 | ||
126 | ld->aio_events = malloc(td->iodepth * sizeof(struct io_event)); | |
84585003 | 127 | memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event)); |
2866c82d JA |
128 | td->io_ops->data = ld; |
129 | return 0; | |
130 | } | |
131 | ||
132 | struct ioengine_ops ioengine = { | |
133 | .name = "libaio", | |
134 | .version = FIO_IOOPS_VERSION, | |
135 | .init = fio_libaio_init, | |
136 | .prep = fio_libaio_prep, | |
137 | .queue = fio_libaio_queue, | |
138 | .cancel = fio_libaio_cancel, | |
139 | .getevents = fio_libaio_getevents, | |
140 | .event = fio_libaio_event, | |
141 | .cleanup = fio_libaio_cleanup, | |
2866c82d | 142 | }; |
34cfcdaf JA |
143 | |
144 | #else /* FIO_HAVE_LIBAIO */ | |
145 | ||
146 | /* | |
147 | * When we have a proper configure system in place, we simply wont build | |
148 | * and install this io engine. For now install a crippled version that | |
149 | * just complains and fails to load. | |
150 | */ | |
151 | static int fio_libaio_init(struct thread_data fio_unused *td) | |
152 | { | |
153 | fprintf(stderr, "fio: libaio not available\n"); | |
154 | return 1; | |
155 | } | |
156 | ||
157 | struct ioengine_ops ioengine = { | |
158 | .name = "libaio", | |
159 | .version = FIO_IOOPS_VERSION, | |
160 | .init = fio_libaio_init, | |
161 | }; | |
162 | ||
163 | #endif |