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block/vpc: use current_size field for XenConverter VHD images

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XenConverter VHD images are another VHD image where current_size is
different from the CHS values in the the format header.  Use
current_size as the default, by looking at the creator_app signature
field.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jeff Cody 2016-03-22 23:33:40 -04:00 committed by Kevin Wolf
parent 9bdfb9e8ac
commit bab246db1d
1 changed files with 2 additions and 0 deletions
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2
block/vpc.c
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@ -300,6 +300,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
* 'win ' : current_size Hyper-V
* 'd2v ' : current_size Disk2vhd
* 'tap\0' : current_size XenServer
* 'CTXS' : current_size XenConverter
*
* The user can override the table values via drive options, however
* even with an override we will still use current_size for images
@ -308,6 +309,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
use_chs = (!!strncmp(footer->creator_app, "win ", 4) &&
!!strncmp(footer->creator_app, "qem2", 4) &&
!!strncmp(footer->creator_app, "d2v ", 4) &&
!!strncmp(footer->creator_app, "CTXS", 4) &&
!!memcmp(footer->creator_app, "tap", 4)) || s->force_use_chs;
if (!use_chs || bs->total_sectors == VHD_MAX_GEOMETRY || s->force_use_sz) {