With copy_file_range(2), we can implement the bdrv_co_copy_range semantics. Signed-off-by: Fam Zheng <famz@redhat.com> Message-id: 20180601092648.24614-6-famz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/*
|
|
* Declarations for AIO in the raw protocol
|
|
*
|
|
* 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.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
#ifndef QEMU_RAW_AIO_H
|
|
#define QEMU_RAW_AIO_H
|
|
|
|
#include "qemu/coroutine.h"
|
|
#include "qemu/iov.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_DISCARD 0x0010
|
|
#define QEMU_AIO_WRITE_ZEROES 0x0020
|
|
#define QEMU_AIO_COPY_RANGE 0x0040
|
|
#define QEMU_AIO_TYPE_MASK \
|
|
(QEMU_AIO_READ | \
|
|
QEMU_AIO_WRITE | \
|
|
QEMU_AIO_IOCTL | \
|
|
QEMU_AIO_FLUSH | \
|
|
QEMU_AIO_DISCARD | \
|
|
QEMU_AIO_WRITE_ZEROES | \
|
|
QEMU_AIO_COPY_RANGE)
|
|
|
|
/* AIO flags */
|
|
#define QEMU_AIO_MISALIGNED 0x1000
|
|
#define QEMU_AIO_BLKDEV 0x2000
|
|
|
|
|
|
/* linux-aio.c - Linux native implementation */
|
|
#ifdef CONFIG_LINUX_AIO
|
|
typedef struct LinuxAioState LinuxAioState;
|
|
LinuxAioState *laio_init(void);
|
|
void laio_cleanup(LinuxAioState *s);
|
|
int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
|
|
uint64_t offset, QEMUIOVector *qiov, int type);
|
|
BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
|
|
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
|
BlockCompletionFunc *cb, void *opaque, int type);
|
|
void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context);
|
|
void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context);
|
|
void laio_io_plug(BlockDriverState *bs, LinuxAioState *s);
|
|
void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s);
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
typedef struct QEMUWin32AIOState QEMUWin32AIOState;
|
|
QEMUWin32AIOState *win32_aio_init(void);
|
|
void win32_aio_cleanup(QEMUWin32AIOState *aio);
|
|
int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
|
|
BlockAIOCB *win32_aio_submit(BlockDriverState *bs,
|
|
QEMUWin32AIOState *aio, HANDLE hfile,
|
|
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
|
|
BlockCompletionFunc *cb, void *opaque, int type);
|
|
void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
|
|
AioContext *old_context);
|
|
void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
|
|
AioContext *new_context);
|
|
#endif
|
|
|
|
#endif /* QEMU_RAW_AIO_H */
|