2a2359b844
This implements a VDUSE block backends based on
the libvduse library. We can use it to export the BDSs
for both VM and container (host) usage.
The new command-line syntax is:
$ qemu-storage-daemon \
--blockdev file,node-name=drive0,filename=test.img \
--export vduse-blk,node-name=drive0,id=vduse-export0,writable=on
After the qemu-storage-daemon started, we need to use
the "vdpa" command to attach the device to vDPA bus:
$ vdpa dev add name vduse-export0 mgmtdev vduse
Also the device must be removed via the "vdpa" command
before we stop the qemu-storage-daemon.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220523084611.91-7-xieyongji@bytedance.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
21 lines
463 B
C
21 lines
463 B
C
/*
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* Export QEMU block device via VDUSE
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*
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* Copyright (C) 2022 Bytedance Inc. and/or its affiliates. All rights reserved.
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*
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* Author:
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* Xie Yongji <xieyongji@bytedance.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef VDUSE_BLK_H
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#define VDUSE_BLK_H
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#include "block/export.h"
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extern const BlockExportDriver blk_exp_vduse_blk;
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#endif /* VDUSE_BLK_H */
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