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
/*
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* QEMU I/O channels block driver
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*
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* Copyright (c) 2022 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QIO_CHANNEL_BLOCK_H
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#define QIO_CHANNEL_BLOCK_H
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#include "io/channel.h"
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#include "qom/object.h"
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#define TYPE_QIO_CHANNEL_BLOCK "qio-channel-block"
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OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelBlock, QIO_CHANNEL_BLOCK)
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/**
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* QIOChannelBlock:
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*
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* The QIOChannelBlock object provides a channel implementation
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* that is able to perform I/O on the BlockDriverState objects
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* to the VMState region.
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*/
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struct QIOChannelBlock {
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QIOChannel parent;
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BlockDriverState *bs;
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off_t offset;
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};
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/**
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* qio_channel_block_new:
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* @bs: the block driver state
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*
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* Create a new IO channel object that can perform
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* I/O on a BlockDriverState object to the VMState
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* region
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*
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* Returns: the new channel object
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*/
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QIOChannelBlock *
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qio_channel_block_new(BlockDriverState *bs);
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#endif /* QIO_CHANNEL_BLOCK_H */
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