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From add89f969fc86f3b3223c4283ee49fcb507b8f81 Mon Sep 17 00:00:00 2001
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From: Zhang Shengju <zhangsju@gmail.com>
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Date: Tue, 13 Mar 2012 22:38:13 +0800
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Subject: [PATCH] block/vpc: write checksum back to footer after check
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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After validation check, the 'checksum' is not written back
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to footer, which leave it with zero.
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This results in errors while loadding it under Microsoft's
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Hyper-V environment, and also errors from utilities like
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Citrix's vhd-util.
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Signed-off-by: Zhang Shengju <sean_zhang@trendmicro.com.cn>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit c088b691363070d151f80cc1fde4b7c151bdfe8f)
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Signed-off-by: Andreas Färber <afaerber@suse.de>
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---
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block/vpc.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/block/vpc.c b/block/vpc.c
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index ac33e15..55201e2 100644
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--- a/block/vpc.c
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+++ b/block/vpc.c
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@@ -170,6 +170,9 @@ static int vpc_open(BlockDriverState *bs, int flags)
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fprintf(stderr, "block-vpc: The header checksum of '%s' is "
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"incorrect.\n", bs->filename);
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+ /* Write 'checksum' back to footer, or else will leave it with zero. */
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+ footer->checksum = be32_to_cpu(checksum);
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+
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// The visible size of a image in Virtual PC depends on the geometry
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// rather than on the size stored in the footer (the size in the footer
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// is too large usually)
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--
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1.7.11.2
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