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由 Alberto Garcia 提交于
This patch splits do_perform_cow() into three separate functions to read, encrypt and write the COW regions. perform_cow() can now read both regions first, then encrypt them and finally write them to disk. The memory allocation is also done in this function now, using one single buffer large enough to hold both regions. Signed-off-by: NAlberto Garcia <berto@igalia.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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