2 * QEMU Posix block I/O backend AIO support
4 * Copyright IBM, Corp. 2008
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
13 #ifndef QEMU_RAW_POSIX_AIO_H
14 #define QEMU_RAW_POSIX_AIO_H
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_TYPE_MASK \
21 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL)
24 #define QEMU_AIO_MISALIGNED 0x1000
27 /* posix-aio-compat.c - thread pool based implementation */
28 void *paio_init(void);
29 BlockDriverAIOCB
*paio_submit(BlockDriverState
*bs
, void *aio_ctx
, int fd
,
30 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
31 BlockDriverCompletionFunc
*cb
, void *opaque
, int type
);
32 BlockDriverAIOCB
*paio_ioctl(BlockDriverState
*bs
, int fd
,
33 unsigned long int req
, void *buf
,
34 BlockDriverCompletionFunc
*cb
, void *opaque
);
36 /* linux-aio.c - Linux native implementation */
37 void *laio_init(void);
38 BlockDriverAIOCB
*laio_submit(BlockDriverState
*bs
, void *aio_ctx
, int fd
,
39 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
40 BlockDriverCompletionFunc
*cb
, void *opaque
, int type
);
42 #endif /* QEMU_RAW_POSIX_AIO_H */