Trond Myklebust 8f7d5efbef NFSv4.1: Fix some issues with pnfs_generic_pg_test
1. If the intention is to coalesce requests 'prev' and 'req' then we
   have to ensure at least that we have a layout starting at
   req_offset(prev).

2. If we're only requesting a minimal layout of length desc->pg_count,
   we need to test the length actually returned by the server before
   we allow the coalescing to occur.

3. We need to deal correctly with (pgio->lseg == NULL)

4. Fixup the test guarding the pnfs_update_layout.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-06-21 11:54:05 -04:00
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