nfs41: lease renewal

Send a NFSv4.1 SEQUENCE op rather than RENEW that was deprecated in
minorversion 1.
Use the nfs_client minorversion to select reboot_recover/
network_partition_recovery/state_renewal ops.

Note: we use reclaimer to create the nfs41 session before there are any
cl_superblocks for the nfs_client.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: check for session not minorversion]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[revamped patch for new nfs4_state_manager design]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: obliterate nfs4_state_recovery_ops.renew_lease method]
    moved to nfs4_state_maintenance_ops
[also undid per-minorversion nfs4_state_recovery_ops here]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 33 insertions, 1 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 7cc1cddfd9ba..ae25cc21fe70 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -180,6 +180,10 @@ struct nfs4_state_recovery_ops {
         int (*recover_lock)(struct nfs4_state *, struct file_lock *);
 };
 
+struct nfs4_state_maintenance_ops {
+        int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *);
+};
+
 extern const struct dentry_operations nfs4_dentry_operations;
 extern const struct inode_operations nfs4_dir_inode_operations;
 
@@ -220,6 +224,8 @@ static inline int nfs4_setup_sequence(struct nfs_client *clp,
 }
 #endif /* CONFIG_NFS_V4_1 */
 
+extern struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[];
+
 extern const u32 nfs4_fattr_bitmap[2];
 extern const u32 nfs4_statfs_bitmap[2];
 extern const u32 nfs4_pathconf_bitmap[2];
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a2855391b079..101ba6aed101 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3016,6 +3016,9 @@ static void nfs4_renew_done(struct rpc_task *task, void *data)
         if (time_before(clp->cl_last_renewal,timestamp))
                 clp->cl_last_renewal = timestamp;
         spin_unlock(&clp->cl_lock);
+        dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
+                                task->tk_msg.rpc_cred);
+        put_rpccred(task->tk_msg.rpc_cred);
 }
 
 static const struct rpc_call_ops nfs4_renew_ops = {
@@ -4790,6 +4793,27 @@ struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
         .recover_lock   = nfs4_lock_expired,
 };
 
+struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
+        .sched_state_renewal = nfs4_proc_async_renew,
+};
+
+#if defined(CONFIG_NFS_V4_1)
+struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
+        .sched_state_renewal = nfs41_proc_async_sequence,
+};
+#endif
+
+/*
+ * Per minor version reboot and network partition recovery ops
+ */
+
+struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
+        &nfs40_state_renewal_ops,
+#if defined(CONFIG_NFS_V4_1)
+        &nfs41_state_renewal_ops,
+#endif
+};
+
 static const struct inode_operations nfs4_file_inode_operations = {
         .permission     = nfs_permission,
         .getattr        = nfs_getattr,
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index f524e932ff7b..92b43e87267c 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -59,12 +59,14 @@
 void
 nfs4_renew_state(struct work_struct *work)
 {
+        struct nfs4_state_maintenance_ops *ops;
         struct nfs_client *clp =
                 container_of(work, struct nfs_client, cl_renewd.work);
         struct rpc_cred *cred;
         long lease, timeout;
         unsigned long last, now;
 
+        ops = nfs4_state_renewal_ops[clp->cl_minorversion];
         dprintk("%s: start\n", __func__);
         /* Are there any active superblocks? */
         if (list_empty(&clp->cl_superblocks))
@@ -86,7 +88,7 @@ nfs4_renew_state(struct work_struct *work)
                         nfs_expire_all_delegations(clp);
                 } else {
                         /* Queue an asynchronous RENEW. */
-                        nfs4_proc_async_renew(clp, cred);
+                        ops->sched_state_renewal(clp, cred);
                         put_rpccred(cred);
                 }
                 timeout = (2 * lease) / 3;