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, 12 deletions

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index 28b34c740c43..0bdc2f4957ff 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -37,17 +37,9 @@
 
 struct rpcsec_gss_info;
 
-/* auth_cred ac_flags bits */
-enum {
-        RPC_CRED_KEY_EXPIRE_SOON = 1, /* underlying cred key will expire soon */
-        RPC_CRED_NOTIFY_TIMEOUT = 2,   /* nofity generic cred when underlying
-                                        key will expire soon */
-};
-
 struct auth_cred {
         const struct cred *cred;
         const char *principal;  /* If present, this is a machine credential */
-        unsigned long ac_flags;
 };
 
 /*
@@ -154,7 +146,6 @@ struct rpc_credops {
         int                     (*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
                                                 void *, __be32 *, void *);
         int                     (*crkey_timeout)(struct rpc_cred *);
-        bool                    (*crkey_to_expire)(struct rpc_cred *);
         char *                  (*crstringify_acceptor)(struct rpc_cred *);
         bool                    (*crneed_reencode)(struct rpc_task *);
 };
@@ -198,9 +189,6 @@ int			rpcauth_uptodatecred(struct rpc_task *);
 int                     rpcauth_init_credcache(struct rpc_auth *);
 void                    rpcauth_destroy_credcache(struct rpc_auth *);
 void                    rpcauth_clear_credcache(struct rpc_cred_cache *);
-int                     rpcauth_key_timeout_notify(struct rpc_auth *,
-                                                struct rpc_cred *);
-bool                    rpcauth_cred_key_to_expire(struct rpc_auth *, struct rpc_cred *);
 char *                  rpcauth_stringify_acceptor(struct rpc_cred *);
 
 static inline