BAD_SEQID drops state_owner, but lock stateid can still be found

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I'm working on a RHEL6 bug where the client gets stuck in a
WRITE,BAD_STATEID loop forever, and it looks like what happens is the write
continually picks a delegated write lock stateid in nfs4_select_rw_stateid()
for the write which never gets cleaned up in the state machine because a
previous OPEN during recovery had a BAD_SEQID come in which dropped the
state_owner.

Does it make sense to try to find lock stateids and set NFS_LOCK_LOST if
we're going to drop the state_owner?

It may be entirely impossible to reproduce the problem upstream, but I
figured I'd ask while I try..

Ben
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