1/*
2 * QEMU Posix block I/O backend AIO support
3 *
4 * Copyright IBM, Corp. 2008
5 *
6 * Authors:
7 *  Anthony Liguori   <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2.  See
10 * the COPYING file in the top-level directory.
11 *
12 */
13#ifndef QEMU_RAW_POSIX_AIO_H
14#define QEMU_RAW_POSIX_AIO_H
15
16/* AIO request types */
17#define QEMU_AIO_READ         0x0001
18#define QEMU_AIO_WRITE        0x0002
19#define QEMU_AIO_IOCTL        0x0004
20#define QEMU_AIO_FLUSH        0x0008
21#define QEMU_AIO_TYPE_MASK \
22	(QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH)
23
24/* AIO flags */
25#define QEMU_AIO_MISALIGNED   0x1000
26
27
28/* posix-aio-compat.c - thread pool based implementation */
29int paio_init(void);
30BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,
31        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
32        BlockDriverCompletionFunc *cb, void *opaque, int type);
33BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd,
34        unsigned long int req, void *buf,
35        BlockDriverCompletionFunc *cb, void *opaque);
36
37/* linux-aio.c - Linux native implementation */
38void *laio_init(void);
39BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
40        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
41        BlockDriverCompletionFunc *cb, void *opaque, int type);
42
43#endif /* QEMU_RAW_POSIX_AIO_H */
44