1 files changed, 20 insertions, 0 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index cd3469720cb..e59fd31c9a2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -154,6 +154,8 @@ typedef struct {
 	decode_dirent_t	decode;
 	int		plus;
 	int		error;
+	unsigned long	timestamp;
+	int		timestamp_valid;
 } nfs_readdir_descriptor_t;
 
 /* Now we cache directories properly, by stuffing the dirent
@@ -195,6 +197,8 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 		}
 		goto error;
 	}
+	desc->timestamp = timestamp;
+	desc->timestamp_valid = 1;
 	SetPageUptodate(page);
 	spin_lock(&inode->i_lock);
 	NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
@@ -225,6 +229,10 @@ int dir_decode(nfs_readdir_descriptor_t *desc)
 	if (IS_ERR(p))
 		return PTR_ERR(p);
 	desc->ptr = p;
+	if (desc->timestamp_valid)
+		desc->entry->fattr->time_start = desc->timestamp;
+	else
+		desc->entry->fattr->valid &= ~NFS_ATTR_FATTR;
 	return 0;
 }
 
@@ -316,6 +324,10 @@ int find_dirent_page(nfs_readdir_descriptor_t *desc)
 			__FUNCTION__, desc->page_index,
 			(long long) *desc->dir_cookie);
 
+	/* If we find the page in the page_cache, we cannot be sure
+	 * how fresh the data is, so we will ignore readdir_plus attributes.
+	 */
+	desc->timestamp_valid = 0;
 	page = read_cache_page(inode->i_mapping, desc->page_index,
 			       (filler_t *)nfs_readdir_filler, desc);
 	if (IS_ERR(page)) {
@@ -468,6 +480,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
 	struct rpc_cred	*cred = nfs_file_cred(file);
 	struct page	*page = NULL;
 	int		status;
+	unsigned long	timestamp;
 
 	dfprintk(DIRCACHE, "NFS: uncached_readdir() searching for cookie %Lu\n",
 			(unsigned long long)*desc->dir_cookie);
@@ -477,6 +490,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
 		status = -ENOMEM;
 		goto out;
 	}
+	timestamp = jiffies;
 	desc->error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, *desc->dir_cookie,
 						page,
 						NFS_SERVER(inode)->dtsize,
@@ -487,6 +501,8 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
 	desc->page = page;
 	desc->ptr = kmap(page);		/* matching kunmap in nfs_do_filldir */
 	if (desc->error >= 0) {
+		desc->timestamp = timestamp;
+		desc->timestamp_valid = 1;
 		if ((status = dir_decode(desc)) == 0)
 			desc->entry->prev_cookie = *desc->dir_cookie;
 	} else
@@ -849,6 +865,10 @@ 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 (S_ISDIR(inode->i_mode))
+		/* drop any readdir cache as it could easily be old */
+		NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
+
 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
 		lock_kernel();
 		drop_nlink(inode);