From cae7a073a4c5484cc5713eab606bf54b46724ab3 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 18 Oct 2005 14:20:19 -0700
Subject: [PATCH] NFSv4: Return delegation upon rename or removal of file.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
 fs/nfs/delegation.c |  2 +-
 fs/nfs/delegation.h | 16 +++++++++++++++-
 fs/nfs/dir.c        |  3 +++
 fs/nfs/inode.c      |  3 +--
 4 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 4a36839f0bb..44135af9894 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -142,7 +142,7 @@ static void nfs_msync_inode(struct inode *inode)
 /*
  * Basic procedure for returning a delegation to the server
  */
-int nfs_inode_return_delegation(struct inode *inode)
+int __nfs_inode_return_delegation(struct inode *inode)
 {
 	struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
 	struct nfs_inode *nfsi = NFS_I(inode);
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 3f6c45a29d6..8017846b561 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -25,7 +25,7 @@ struct nfs_delegation {
 
 int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
 void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
-int nfs_inode_return_delegation(struct inode *inode);
+int __nfs_inode_return_delegation(struct inode *inode);
 int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
 
 struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle);
@@ -47,11 +47,25 @@ static inline int nfs_have_delegation(struct inode *inode, int flags)
 		return 1;
 	return 0;
 }
+
+static inline int nfs_inode_return_delegation(struct inode *inode)
+{
+	int err = 0;
+
+	if (NFS_I(inode)->delegation != NULL)
+		err = __nfs_inode_return_delegation(inode);
+	return err;
+}
 #else
 static inline int nfs_have_delegation(struct inode *inode, int flags)
 {
 	return 0;
 }
+
+static inline int nfs_inode_return_delegation(struct inode *inode)
+{
+	return 0;
+}
 #endif
 
 #endif
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ac331d2d4c4..72f50c0117b 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -801,6 +801,7 @@ static int nfs_dentry_delete(struct dentry *dentry)
  */
 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
 {
+	nfs_inode_return_delegation(inode);
 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
 		lock_kernel();
 		inode->i_nlink--;
@@ -1329,6 +1330,7 @@ static int nfs_safe_remove(struct dentry *dentry)
 
 	nfs_begin_data_update(dir);
 	if (inode != NULL) {
+		nfs_inode_return_delegation(inode);
 		nfs_begin_data_update(inode);
 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
 		/* The VFS may want to delete this inode */
@@ -1547,6 +1549,7 @@ go_ahead:
 		nfs_wb_all(old_inode);
 		shrink_dcache_parent(old_dentry);
 	}
+	nfs_inode_return_delegation(old_inode);
 
 	if (new_inode)
 		d_delete(new_dentry);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index d7abaa00473..6b0f7fe6bd1 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1671,8 +1671,7 @@ static void nfs4_clear_inode(struct inode *inode)
 	struct nfs_inode *nfsi = NFS_I(inode);
 
 	/* If we are holding a delegation, return it! */
-	if (nfsi->delegation != NULL)
-		nfs_inode_return_delegation(inode);
+	nfs_inode_return_delegation(inode);
 	/* First call standard NFS clear_inode() code */
 	nfs_clear_inode(inode);
 	/* Now clear out any remaining state */