linux-kernel - [ 46/79] fuse: readdirplus: fix instantiate

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Date:	Fri, 26 Jul 2013 13:47:36 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Miklos Szeredi <mszeredi@...e.cz>
Subject: [ 46/79] fuse: readdirplus: fix instantiate

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Miklos Szeredi <mszeredi@...e.cz>

commit 2914941e3178d84a216fc4eb85292dfef3b6d628 upstream.

Fuse does instantiation slightly differently from NFS/CIFS which use
d_materialise_unique().

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/fuse/dir.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1264,10 +1264,19 @@ static int fuse_direntplus_link(struct f
 	if (!inode)
 		goto out;
 
-	alias = d_materialise_unique(dentry, inode);
-	err = PTR_ERR(alias);
-	if (IS_ERR(alias))
-		goto out;
+	if (S_ISDIR(inode->i_mode)) {
+		mutex_lock(&fc->inst_mutex);
+		alias = fuse_d_add_directory(dentry, inode);
+		mutex_unlock(&fc->inst_mutex);
+		err = PTR_ERR(alias);
+		if (IS_ERR(alias)) {
+			iput(inode);
+			goto out;
+		}
+	} else {
+		alias = d_splice_alias(inode, dentry);
+	}
+
 	if (alias) {
 		dput(dentry);
 		dentry = alias;


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