nfs41: introduce get_state_renewal_cred

Use the machine cred for sending SEQUENCE to renew
the client's lease.

[revamp patch for new state management design starting 2.6.29]
[nfs41: support minorversion 1 for nfs4_check_lease]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: get cred in exchange_id when cred arg is NULL]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: use cl_machined_cred instead of cl_ex_cred]
    Since EXCHANGE_ID insists on using the machine credential, cl_ex_cred is
    not needed. nfs4_proc_exchange_id() is only called if the machine credential
    is available. Remove the credential logic from nfs4_proc_exchange_id.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

4 files changed, 14 insertions, 14 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 095bf4690e84..2b141c5758ec 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -182,6 +182,7 @@ struct nfs4_state_recovery_ops {
 
 struct nfs4_state_maintenance_ops {
         int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *);
+        struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
         int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
 };
 
@@ -240,7 +241,11 @@ extern void nfs4_kill_renewd(struct nfs_client *);
 extern void nfs4_renew_state(struct work_struct *);
 
 /* nfs4state.c */
+struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
 struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
+#if defined(CONFIG_NFS_V4_1)
+struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
+#endif /* CONFIG_NFS_V4_1 */
 
 extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index da481bda44f7..f862a66e5fb9 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4236,6 +4236,7 @@ static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
 
         dprintk("--> %s\n", __func__);
         BUG_ON(clp == NULL);
+
         p = (u32 *)verifier.data;
         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
@@ -4795,12 +4796,14 @@ struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
 
 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
         .sched_state_renewal = nfs4_proc_async_renew,
+        .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
         .renew_lease = nfs4_proc_renew,
 };
 
 #if defined(CONFIG_NFS_V4_1)
 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
         .sched_state_renewal = nfs41_proc_async_sequence,
+        .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
         .renew_lease = nfs4_proc_sequence,
 };
 #endif
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index 92b43e87267c..e27c6cef18f2 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -78,7 +78,7 @@ nfs4_renew_state(struct work_struct *work)
         timeout = (2 * lease) / 3 + (long)last - (long)now;
         /* Are we close to a lease timeout? */
         if (time_after(now, last + lease/3)) {
-                cred = nfs4_get_renew_cred_locked(clp);
+                cred = ops->get_state_renewal_cred_locked(clp);
                 spin_unlock(&clp->cl_lock);
                 if (cred == NULL) {
                         if (list_empty(&clp->cl_delegations)) {
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index dc5599c7f4d9..da940abcfaa5 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -77,7 +77,7 @@ static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
         return status;
 }
 
-static struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp)
+struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp)
 {
         struct rpc_cred *cred = NULL;
 
@@ -114,17 +114,7 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp)
         return cred;
 }
 
-static struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
-{
-        struct rpc_cred *cred;
-
-        spin_lock(&clp->cl_lock);
-        cred = nfs4_get_renew_cred_locked(clp);
-        spin_unlock(&clp->cl_lock);
-        return cred;
-}
-
-static struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
+struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
 {
         struct nfs4_state_owner *sp;
         struct rb_node *pos;
@@ -1090,7 +1080,9 @@ static int nfs4_check_lease(struct nfs_client *clp)
         /* Is the client already known to have an expired lease? */
         if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
                 return 0;
-        cred = nfs4_get_renew_cred(clp);
+        spin_lock(&clp->cl_lock);
+        cred = ops->get_state_renewal_cred_locked(clp);
+        spin_unlock(&clp->cl_lock);
         if (cred == NULL) {
                 cred = nfs4_get_setclientid_cred(clp);
                 if (cred == NULL)