mirror of
https://github.com/qemu/qemu.git
synced 2024-12-18 17:53:40 +08:00
65cf200a51
Introduce a QIOChannelBlock class that exposes the BlockDriverState VMState region for I/O. This is kept in the migration/ directory rather than io/, to avoid a mutual dependancy between block/ <-> io/ directories. Also the VMState should only be used by the migration code. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> dgilbert: Fixed coding style in qio_channel_block_close
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
|
|
* QEMU I/O channels block driver
|
|
*
|
|
* Copyright (c) 2022 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef QIO_CHANNEL_BLOCK_H
|
|
#define QIO_CHANNEL_BLOCK_H
|
|
|
|
#include "io/channel.h"
|
|
#include "qom/object.h"
|
|
|
|
#define TYPE_QIO_CHANNEL_BLOCK "qio-channel-block"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelBlock, QIO_CHANNEL_BLOCK)
|
|
|
|
|
|
/**
|
|
* QIOChannelBlock:
|
|
*
|
|
* The QIOChannelBlock object provides a channel implementation
|
|
* that is able to perform I/O on the BlockDriverState objects
|
|
* to the VMState region.
|
|
*/
|
|
|
|
struct QIOChannelBlock {
|
|
QIOChannel parent;
|
|
BlockDriverState *bs;
|
|
off_t offset;
|
|
};
|
|
|
|
|
|
/**
|
|
* qio_channel_block_new:
|
|
* @bs: the block driver state
|
|
*
|
|
* Create a new IO channel object that can perform
|
|
* I/O on a BlockDriverState object to the VMState
|
|
* region
|
|
*
|
|
* Returns: the new channel object
|
|
*/
|
|
QIOChannelBlock *
|
|
qio_channel_block_new(BlockDriverState *bs);
|
|
|
|
#endif /* QIO_CHANNEL_BLOCK_H */
|