On 12/03/2014 06:37 AM, Max Reitz wrote: > Since refcounts do not always have to be a uint16_t, all refcount blocks > and arrays in memory should not have a specific type (thus they become > pointers to void) and for accessing them, two helper functions are used > (a getter and a setter). Those functions are called indirectly through > function pointers in the BDRVQcowState so they may later be exchanged > for different refcount orders. > > With the check and repair functions using this function, the refcount > array they are creating will be in big endian byte order; additionally, > using realloc_refcount_array() makes the size of this refcount array > always cluster-aligned. Both combined allow rebuild_refcount_structure() > to drop the bounce buffer which was used to convert parts of the > refcount array to big endian byte order and store them on disk. Instead, > those parts can now be written directly. > > Signed-off-by: Max Reitz <mre...@redhat.com> > --- > block/qcow2-refcount.c | 122 > ++++++++++++++++++++++++++++--------------------- > block/qcow2.h | 8 ++++ > 2 files changed, 79 insertions(+), 51 deletions(-) >
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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