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authorNeilBrown <neilb@suse.com>2018-12-03 11:30:30 +1100
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2018-12-19 13:52:45 -0500
commita534ecb013bfc58a7f03653c7f2976bc341da98f (patch)
tree55d3c1b4a992afc33c28b5d1d4e37943de4b1389 /fs/nfs/client.c
parent1a80810fbf238e6dbaaaa5262a76d328ace21376 (diff)
downloadlinux-a534ecb013bfc58a7f03653c7f2976bc341da98f.tar.bz2
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 <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/client.c')
-rw-r--r--fs/nfs/client.c2
1 files changed, 2 insertions, 0 deletions
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);