tree 0495090149bcb5c9d160c06d3c9529d238148f66
parent 7ce21016b69b512bf4777965a4292318f2bc7544
author Paolo Bonzini <pbonzini@redhat.com> 1385123988 +0100
committer Stefan Hajnoczi <stefanha@redhat.com> 1386080809 +0100

block: make bdrv_co_do_write_zeroes stricter in producing aligned requests

Right now, bdrv_co_do_write_zeroes will only try to align the
beginning of the request.  However, it is simpler for many
formats to expect the block layer to separate both the head *and*
the tail.  This makes sure that the format's bdrv_co_write_zeroes
function will be called with aligned sector_num and nb_sectors for
the bulk of the request.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>