mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-27 13:30:52 +00:00
68d7946648
Between the submission of a request and the unplug, other devices with larger limits may have been queued new requests without flushing the batch. Using the new `dev_max_batch` parameter, laio_io_unplug() can check if the batch exceeds the device limit to flush the current batch. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20211026162346.253081-4-sgarzare@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
91 lines
3.2 KiB
C
91 lines
3.2 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 "block/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_TRUNCATE 0x0080
|
|
#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 | \
|
|
QEMU_AIO_TRUNCATE)
|
|
|
|
/* AIO flags */
|
|
#define QEMU_AIO_MISALIGNED 0x1000
|
|
#define QEMU_AIO_BLKDEV 0x2000
|
|
#define QEMU_AIO_NO_FALLBACK 0x4000
|
|
|
|
|
|
/* linux-aio.c - Linux native implementation */
|
|
#ifdef CONFIG_LINUX_AIO
|
|
typedef struct LinuxAioState LinuxAioState;
|
|
LinuxAioState *laio_init(Error **errp);
|
|
void laio_cleanup(LinuxAioState *s);
|
|
int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
|
|
uint64_t offset, QEMUIOVector *qiov, int type,
|
|
uint64_t dev_max_batch);
|
|
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,
|
|
uint64_t dev_max_batch);
|
|
#endif
|
|
/* io_uring.c - Linux io_uring implementation */
|
|
#ifdef CONFIG_LINUX_IO_URING
|
|
typedef struct LuringState LuringState;
|
|
LuringState *luring_init(Error **errp);
|
|
void luring_cleanup(LuringState *s);
|
|
int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd,
|
|
uint64_t offset, QEMUIOVector *qiov, int type);
|
|
void luring_detach_aio_context(LuringState *s, AioContext *old_context);
|
|
void luring_attach_aio_context(LuringState *s, AioContext *new_context);
|
|
void luring_io_plug(BlockDriverState *bs, LuringState *s);
|
|
void luring_io_unplug(BlockDriverState *bs, LuringState *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 */
|