[PATCH] ->queue() error handling
[fio.git] / engines / fio-engine-libaio.c
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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
15struct libaio_data {
16 io_context_t aio_ctx;
17 struct io_event *aio_events;
18};
19
7a16dd02 20static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
2866c82d 21{
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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);
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28 else if (io_u->ddir == DDIR_SYNC)
29 io_prep_fsync(&io_u->iocb, f->fd);
30 else
31 return 1;
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32
33 return 0;
34}
35
36static 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
43static 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)
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57 break;
58 } while (1);
59
87dc1ab1 60 return (int) -r;
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61}
62
63static 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)
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74 usleep(100);
75 else if (ret == -EINTR)
76 continue;
77 else
78 break;
79 } while (1);
80
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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;
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88}
89
90static 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
97static 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
111static 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));
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123 td->io_ops->data = ld;
124 return 0;
125}
126
127struct 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};