qemu/block/raw-posix-aio.h
Kevin Wolf 1e5b9d2fcc Remove aio_ctx from paio_* interface
The context parameter in paio_submit isn't used anyway, so there is no reason
why block drivers should need to remember it. This also avoids passing a Linux
AIO context to paio_submit (which doesn't do any harm as long as the parameter
is unused, but it is highly confusing).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-30 08:39:34 -05:00

44 lines
1.3 KiB
C

/*
* 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 */