tree df2f038701b076624b4192a8dc14ee1844ae7842
parent b21d677ee9efe431a4acc653a8cfb12650e44cec
author Paolo Bonzini <pbonzini@redhat.com> 1336488718 +0200
committer Kevin Wolf <kwolf@redhat.com> 1336640519 +0200

stream: do not copy unallocated sectors from the base

Unallocated sectors should really never be accessed by the guest,
so there's no need to copy them during the streaming process.
If they are read by the guest during streaming, guest-initiated
copy-on-read will copy them (we're in the base == NULL case, which
enables copy on read).  If they are read after we disconnect the
image from the base, they will read as zeroes anyway.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>