From ab707e156593ff7fffd615757332dbff6616836a Mon Sep 17 00:00:00 2001 From: Benny Halevy Date: Wed, 12 May 2010 00:14:06 +0300 Subject: [PATCH] nfsd4: nfsd4_destroy_session must set callback client under the state lock nfsd4_set_callback_client must be called under the state lock to atomically set or unset the callback client and shutting down the previous one. Signed-off-by: Benny Halevy Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4callback.c | 1 + fs/nfsd/nfs4state.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 1d5051d..77bc9d3 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -718,6 +718,7 @@ void nfsd4_destroy_callback_queue(void) destroy_workqueue(callback_wq); } +/* must be called under the state lock */ void nfsd4_set_callback_client(struct nfs4_client *clp, struct rpc_clnt *new) { struct rpc_clnt *old = clp->cl_cb_client; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index cc0e911..ede9dde 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1427,8 +1427,10 @@ nfsd4_destroy_session(struct svc_rqst *r, unhash_session(ses); spin_unlock(&client_lock); + nfs4_lock_state(); /* wait for callbacks */ nfsd4_set_callback_client(ses->se_client, NULL); + nfs4_unlock_state(); nfsd4_put_session(ses); status = nfs_ok; out: -- 2.7.4