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authorAndy Adamson <andros@netapp.com>2009-12-04 15:55:38 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-12-04 15:55:38 -0500
commitea028ac92541ac30bf202ed94cb53eec2ea0c9d6 (patch)
treef9b807cf0f870db922f96e72dab68ed37ba18cf0 /fs/nfs/nfs4_fs.h
parent05f0d2364726c92f6b870db654967088349379fe (diff)
downloadop-kernel-dev-ea028ac92541ac30bf202ed94cb53eec2ea0c9d6.zip
op-kernel-dev-ea028ac92541ac30bf202ed94cb53eec2ea0c9d6.tar.gz
nfs41: nfs41: fix state manager deadlock in session reset
If the session is reset during state recovery, the state manager thread can sleep on the slot_tbl_waitq causing a deadlock. Add a completion framework to the session. Have the state manager thread set a new session state (NFS4CLNT_SESSION_DRAINING) and wait for the session slot table to drain. Signal the state manager thread in nfs41_sequence_free_slot when the NFS4CLNT_SESSION_DRAINING bit is set and the session is drained. Reported-by: Trond Myklebust <trond@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4_fs.h')
-rw-r--r--fs/nfs/nfs4_fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index e9ecd6b..5c77401 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -45,6 +45,7 @@ enum nfs4_client_state {
NFS4CLNT_RECLAIM_NOGRACE,
NFS4CLNT_DELEGRETURN,
NFS4CLNT_SESSION_RESET,
+ NFS4CLNT_SESSION_DRAINING,
};
/*
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