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vpc: use current_size field for XenServer VHD images

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The vpc driver has two methods of determining virtual disk size.  The
correct one to use depends on the software that generated the image
file.  Add the XenServer creator_app signature so that image size is
correctly detected for those images.

Reported-by: Grant Wu <grantwwu@gmail.com>
Reported-by: Spencer Baugh <sbaugh@catern.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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:
Stefan Hajnoczi 2016-03-22 23:33:39 -04:00 committed by Kevin Wolf
parent 0211b9becc
commit 9bdfb9e8ac
1 changed files with 3 additions and 1 deletions
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4
block/vpc.c
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@ -299,6 +299,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
* 'qem2' : current_size QEMU (uses current_size)
* 'win ' : current_size Hyper-V
* 'd2v ' : current_size Disk2vhd
* 'tap\0' : current_size XenServer
*
* The user can override the table values via drive options, however
* even with an override we will still use current_size for images
@ -306,7 +307,8 @@ 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)) || s->force_use_chs;
!!strncmp(footer->creator_app, "d2v ", 4) &&
!!memcmp(footer->creator_app, "tap", 4)) || s->force_use_chs;
if (!use_chs || bs->total_sectors == VHD_MAX_GEOMETRY || s->force_use_sz) {
bs->total_sectors = be64_to_cpu(footer->current_size) /