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[Qemu-devel] [PATCH] block/vpc: fix virtual size for images created with
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCH] block/vpc: fix virtual size for images created with disk2vhd |
Date: |
Mon, 21 Oct 2013 16:00:18 +0200 |
Signed-off-by: Peter Lieven <address@hidden>
---
block/vpc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/block/vpc.c b/block/vpc.c
index b5dca39..1acc1d4 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -211,6 +211,15 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
int flags,
bs->total_sectors = (int64_t)
be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl;
+ /* images created with disk2vhd report a far higher virtual size
+ * than expected with the cyls * heads * sectors_per_cyl formula.
+ * use the footer->size instead if the image was created with
+ * disk2vhd.
+ */
+ if (!strncmp(footer->creator_app, "d2v", 4)) {
+ bs->total_sectors = be64_to_cpu(footer->size) / BDRV_SECTOR_SIZE;
+ }
+
/* Allow a maximum disk size of approximately 2 TB */
if (bs->total_sectors >= 65535LL * 255 * 255) {
ret = -EFBIG;
--
1.7.9.5
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