nfsd: Fix races with check_stateid_generation()

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The various functions that call check_stateid_generation() in order
to compare a client-supplied stateid with the nfs4_stid state, usually
need to atomically check for closed state. Those that perform the
check after locking the st_mutex using nfsd4_lock_ol_stateid()
should now be OK, but we do want to fix up the others.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

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Trond Myklebust 2017-11-03 08:00:16 -04:00 • committed by J. Bruce Fields

parent 9271d7e509

commit 03da3169c6

1 changed files with 19 additions and 3 deletions

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fs/nfsd/nfs4state.c

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