From a534ecb013bfc58a7f03653c7f2976bc341da98f Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 3 Dec 2018 11:30:30 +1100 Subject: NFSv4: add cl_root_cred for use when machine cred is not available. NFSv4 state management tries a root credential when no machine credential is available, as can happen with kerberos. It does this by replacing the cl_machine_cred with a root credential. This means that any user of the machine credential needs to take a lock while getting a reference to the machine credential, which is a little cumbersome. So introduce an explicit cl_root_cred, and never free either credential until client shutdown. This means that no locking is needed to reference these credentials. Future patches will make use of this. This is only a temporary addition. both cl_machine_cred and cl_root_cred will disappear later in the series. Signed-off-by: NeilBrown Signed-off-by: Anna Schumaker --- fs/nfs/client.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/nfs/client.c') diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 96d5f8135eb9..cce151776709 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -248,6 +248,8 @@ void nfs_free_client(struct nfs_client *clp) if (clp->cl_machine_cred != NULL) put_rpccred(clp->cl_machine_cred); + if (clp->cl_root_cred != NULL) + put_rpccred(clp->cl_root_cred); put_net(clp->cl_net); put_nfs_version(clp->cl_nfs_mod); -- cgit v1.2.3-59-g8ed1b