NFS: move credential expiry tracking out of SUNRPC into NFS.

NFS needs to know when a credential is about to expire so that
it can modify write-back behaviour to finish the write inside the
expiry time.
It currently uses functions in SUNRPC code which make use of a
fairly complex callback scheme and flags in the generic credientials.

As I am working to discard the generic credentials, this has to change.

This patch moves the logic into NFS, in part by finding and caching
the low-level credential in the open_context.  We then make direct
cred-api calls on that.

This makes the code much simpler and removes a dependency on generic
rpc credentials.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 0 insertions, 23 deletions

diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 27d90578e7a0..cf23eed01b1c 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -360,29 +360,6 @@ out_nocache:
 }
 EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
 
-/*
- * Setup a credential key lifetime timeout notification
- */
-int
-rpcauth_key_timeout_notify(struct rpc_auth *auth, struct rpc_cred *cred)
-{
-        if (!cred->cr_auth->au_ops->key_timeout)
-                return 0;
-        return cred->cr_auth->au_ops->key_timeout(auth, cred);
-}
-EXPORT_SYMBOL_GPL(rpcauth_key_timeout_notify);
-
-bool
-rpcauth_cred_key_to_expire(struct rpc_auth *auth, struct rpc_cred *cred)
-{
-        if (auth->au_flags & RPCAUTH_AUTH_NO_CRKEY_TIMEOUT)
-                return false;
-        if (!cred->cr_ops->crkey_to_expire)
-                return false;
-        return cred->cr_ops->crkey_to_expire(cred);
-}
-EXPORT_SYMBOL_GPL(rpcauth_cred_key_to_expire);
-
 char *
 rpcauth_stringify_acceptor(struct rpc_cred *cred)
 {