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We now take a 2-step process that allows us to place data and hole
segments directly at their final position in the xdr_stream without
needing to do a bunch of redundant copies to expand holes. Due to the
variable lengths of each segment, the xdr metadata might cross page
boundaries which I account for by setting a small scratch buffer so
xdr_inline_decode() won't fail.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>