tree fec4adc1f623e1b87851c59a819af623b2342664
parent c6684249fd35f7e692bcf3039d2fc4b13dd32308
author Kevin Wolf <kwolf@redhat.com> 1416497231 +0100
committer Kevin Wolf <kwolf@redhat.com> 1418203872 +0100

block: Read only one sector for format probing

The only image format driver that even potentially accesses anything
after 512 bytes in its bdrv_probe() implementation is VMDK, which reads
a plain-text descriptor file. In practice, the field it's looking for
seems to come first and will be well within the first 512 bytes, too.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1416497234-29880-7-git-send-email-kwolf@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>