On 2/8/19 9:44 AM, Alberto Garcia wrote: > L1 table entries have a field to store the offset of an L2 table. > The rest of the bits of the entry are currently reserved except from > bit 63, which stores the COPIED flag. > > The offset is always taken from the entry using L1E_OFFSET_MASK to > ensure that we only use the bits that belong to that field. > > While that mask is used every time we read from the L1 table, it is > never used when we write to it. Due to the limits set elsewhere in the > code QEMU can never produce L2 table offsets that don't fit in that > field so any such offset when allocating an L2 table would indicate a > bug in QEMU. > > Signed-off-by: Alberto Garcia <be...@igalia.com> > --- > block/qcow2-cluster.c | 3 +++ > 1 file changed, 3 insertions(+)
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
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