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/*

 * 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.

 *

 */

#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

/* posix-aio-compat.c - thread pool based implementation */

int paio_init(void);

BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,

        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,

        BlockDriverCompletionFunc *cb, void *opaque, int type);

BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd,

        unsigned long int req, void *buf,

        BlockDriverCompletionFunc *cb, void *opaque);

/* 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 */