summaryrefslogtreecommitdiff
path: root/block/raw-posix-aio.h
blob: c71436740116fe2ead291ac67d1d06e487d72b84 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/*
 * QEMU Posix block I/O backend AIO support
 *
 * Copyright IBM, Corp. 2008
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */
#ifndef QEMU_RAW_POSIX_AIO_H
#define QEMU_RAW_POSIX_AIO_H

/* AIO request types */
#define QEMU_AIO_READ         0x0001
#define QEMU_AIO_WRITE        0x0002
#define QEMU_AIO_IOCTL        0x0004
#define QEMU_AIO_FLUSH        0x0008
#define QEMU_AIO_TYPE_MASK \
	(QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH)

/* AIO flags */
#define QEMU_AIO_MISALIGNED   0x1000


/* linux-aio.c - Linux native implementation */
void *laio_init(void);
BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque, int type);

#endif /* QEMU_RAW_POSIX_AIO_H */