[PATCH] Kill old libaio/posixaio checks
[fio.git] / engines / fio-engine-posixaio.c
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1/*
2 * posix 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
13struct posixaio_data {
14 struct io_u **aio_events;
15};
16
17static int fill_timespec(struct timespec *ts)
18{
19#ifdef _POSIX_TIMERS
20 if (!clock_gettime(CLOCK_MONOTONIC, ts))
21 return 0;
22
23 perror("clock_gettime");
24#endif
25 return 1;
26}
27
28static unsigned long long ts_utime_since_now(struct timespec *t)
29{
30 long long sec, nsec;
31 struct timespec now;
32
33 if (fill_timespec(&now))
34 return 0;
35
36 sec = now.tv_sec - t->tv_sec;
37 nsec = now.tv_nsec - t->tv_nsec;
38 if (sec > 0 && nsec < 0) {
39 sec--;
40 nsec += 1000000000;
41 }
42
43 sec *= 1000000;
44 nsec /= 1000;
45 return sec + nsec;
46}
47
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48static int fio_posixaio_cancel(struct thread_data fio_unused *td,
49 struct io_u *io_u)
2866c82d 50{
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51 struct fio_file *f = io_u->file;
52 int r = aio_cancel(f->fd, &io_u->aiocb);
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53
54 if (r == 1 || r == AIO_CANCELED)
55 return 0;
56
57 return 1;
58}
59
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60static int fio_posixaio_prep(struct thread_data fio_unused *td,
61 struct io_u *io_u)
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62{
63 struct aiocb *aiocb = &io_u->aiocb;
53cdc686 64 struct fio_file *f = io_u->file;
2866c82d 65
53cdc686 66 aiocb->aio_fildes = f->fd;
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67 aiocb->aio_buf = io_u->buf;
68 aiocb->aio_nbytes = io_u->buflen;
69 aiocb->aio_offset = io_u->offset;
70
71 io_u->seen = 0;
72 return 0;
73}
74
75static int fio_posixaio_getevents(struct thread_data *td, int min, int max,
76 struct timespec *t)
77{
78 struct posixaio_data *pd = td->io_ops->data;
79 struct list_head *entry;
80 struct timespec start;
81 int r, have_timeout = 0;
82
83 if (t && !fill_timespec(&start))
84 have_timeout = 1;
85
86 r = 0;
87restart:
88 list_for_each(entry, &td->io_u_busylist) {
89 struct io_u *io_u = list_entry(entry, struct io_u, list);
90 int err;
91
92 if (io_u->seen)
93 continue;
94
95 err = aio_error(&io_u->aiocb);
96 switch (err) {
97 default:
98 io_u->error = err;
99 case ECANCELED:
100 case 0:
101 pd->aio_events[r++] = io_u;
102 io_u->seen = 1;
103 break;
104 case EINPROGRESS:
105 break;
106 }
107
108 if (r >= max)
109 break;
110 }
111
112 if (r >= min)
113 return r;
114
115 if (have_timeout) {
116 unsigned long long usec;
117
118 usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000);
119 if (ts_utime_since_now(&start) > usec)
120 return r;
121 }
122
123 /*
124 * hrmpf, we need to wait for more. we should use aio_suspend, for
125 * now just sleep a little and recheck status of busy-and-not-seen
126 */
127 usleep(1000);
128 goto restart;
129}
130
131static struct io_u *fio_posixaio_event(struct thread_data *td, int event)
132{
133 struct posixaio_data *pd = td->io_ops->data;
134
135 return pd->aio_events[event];
136}
137
138static int fio_posixaio_queue(struct thread_data fio_unused *td,
139 struct io_u *io_u)
140{
141 struct aiocb *aiocb = &io_u->aiocb;
142 int ret;
143
144 if (io_u->ddir == DDIR_READ)
145 ret = aio_read(aiocb);
87dc1ab1 146 else if (io_u->ddir == DDIR_WRITE)
2866c82d 147 ret = aio_write(aiocb);
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148 else
149 ret = aio_fsync(O_SYNC, aiocb);
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150
151 if (ret)
152 io_u->error = errno;
153
154 return io_u->error;
155}
156
157static void fio_posixaio_cleanup(struct thread_data *td)
158{
159 struct posixaio_data *pd = td->io_ops->data;
160
161 if (pd) {
162 free(pd->aio_events);
163 free(pd);
164 td->io_ops->data = NULL;
165 }
166}
167
168static int fio_posixaio_init(struct thread_data *td)
169{
170 struct posixaio_data *pd = malloc(sizeof(*pd));
171
172 pd->aio_events = malloc(td->iodepth * sizeof(struct io_u *));
173
174 td->io_ops->data = pd;
175 return 0;
176}
177
178struct ioengine_ops ioengine = {
179 .name = "posixaio",
180 .version = FIO_IOOPS_VERSION,
181 .init = fio_posixaio_init,
182 .prep = fio_posixaio_prep,
183 .queue = fio_posixaio_queue,
184 .cancel = fio_posixaio_cancel,
185 .getevents = fio_posixaio_getevents,
186 .event = fio_posixaio_event,
187 .cleanup = fio_posixaio_cleanup,
2866c82d 188};