nfs4.1: prevent race that allowed use of freed layout in _pnfs_return_layout
authorFred Isaman <iisaman@netapp.com>
Wed, 15 Jun 2011 16:31:02 +0000 (12:31 -0400)
committerTrond Myklebust <Trond.Myklebust@netapp.com>
Wed, 15 Jun 2011 16:39:23 +0000 (12:39 -0400)
commitea0ded748bdea78f9e2fefb571f7d6ce9edb4f89
treece4589aecc27e8936529ce1cbc4d8a129a1f43b2
parent1ed3a8539af7b36aa5c977f304e80f7fc8d27bfc
nfs4.1: prevent race that allowed use of freed layout in _pnfs_return_layout

mark_matching_lsegs_invalid could put the last ref to the layout, so
the get_layout_hdr needs to be called first.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
fs/nfs/pnfs.c