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block/vpc: fix virtual size for images created with disk2vhd

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Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Peter Lieven 2013-10-21 16:00:18 +02:00 committed by Stefan Hajnoczi
parent 17826bc159
commit 0173e7bbf3
1 changed files with 9 additions and 0 deletions
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9
block/vpc.c
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@ -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;