qemu

FORK: QEMU emulator
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channel-block.h (1574B)

      1 /*
      2  * QEMU I/O channels block driver
      3  *
      4  * Copyright (c) 2022 Red Hat, Inc.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Lesser General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2.1 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Lesser General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Lesser General Public
     17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18  *
     19  */
     20 
     21 #ifndef QIO_CHANNEL_BLOCK_H
     22 #define QIO_CHANNEL_BLOCK_H
     23 
     24 #include "io/channel.h"
     25 #include "qom/object.h"
     26 
     27 #define TYPE_QIO_CHANNEL_BLOCK "qio-channel-block"
     28 OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelBlock, QIO_CHANNEL_BLOCK)
     29 
     30 
     31 /**
     32  * QIOChannelBlock:
     33  *
     34  * The QIOChannelBlock object provides a channel implementation
     35  * that is able to perform I/O on the BlockDriverState objects
     36  * to the VMState region.
     37  */
     38 
     39 struct QIOChannelBlock {
     40     QIOChannel parent;
     41     BlockDriverState *bs;
     42     off_t offset;
     43 };
     44 
     45 
     46 /**
     47  * qio_channel_block_new:
     48  * @bs: the block driver state
     49  *
     50  * Create a new IO channel object that can perform
     51  * I/O on a BlockDriverState object to the VMState
     52  * region
     53  *
     54  * Returns: the new channel object
     55  */
     56 QIOChannelBlock *
     57 qio_channel_block_new(BlockDriverState *bs);
     58 
     59 #endif /* QIO_CHANNEL_BLOCK_H */