fuse: readdirplus: fix instantiate

commit 2914941e3178d84a216fc4eb85292dfef3b6d628 upstream.

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

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

1 files changed, 13 insertions, 4 deletions

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 5532bf416f9b..a71df0206f6f 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1264,10 +1264,19 @@ static int fuse_direntplus_link(struct file *file,
         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;