2 * QEMU Posix block I/O backend AIO support
4 * Copyright IBM, Corp. 2008
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 */