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>
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 6e0417c..ecf22c0 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -71,6 +71,7 @@
fl_owner_t flock_owner;
struct dentry *dentry;
struct rpc_cred *cred;
+ struct rpc_cred *ll_cred; /* low-level cred - use to check for expiry */
struct nfs4_state *state;
fmode_t mode;
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index 28b34c7..0bdc2f4 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 @@
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_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