Signed-off-by: Richard Weinberger <richard@xxxxxx>
---
fs/ubifs/super.c | 35 +++++++++++++++++++++++++++++++++++
fs/ubifs/ubifs.h | 1 +
2 files changed, 36 insertions(+)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7560071534bf..4788420162b8 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2005,6 +2005,41 @@ const struct fscrypt_operations ubifs_crypt_operations = {
};
#endif
+static struct dentry *ubifs_get_parent(struct dentry *child)
+{
+ struct ubifs_inode *ui = ubifs_inode(d_inode(child));
+
+ return d_obtain_alias(ubifs_iget(child->d_sb, ui->parent_inum));
+}
+
+static struct inode *ubifs_nfs_get_inode(struct super_block *sb, uint64_t ino,
+ uint32_t generation)
+{
+ return ubifs_iget(sb, ino);
+}
+
+static struct dentry *ubifs_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
+ ubifs_nfs_get_inode);
+}
+
+static struct dentry *ubifs_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len,
+ int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
+ ubifs_nfs_get_inode);
+}
+
+static const struct export_operations ubifs_export_ops = {
+ .get_parent = ubifs_get_parent,
+ .fh_to_dentry = ubifs_fh_to_dentry,
+ .fh_to_parent = ubifs_fh_to_parent,
+};
+
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubifs_info *c = sb->s_fs_info;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 3c64481f4032..a728d6e3eb47 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -45,6 +45,7 @@
#endif
#include <linux/random.h>
#include <linux/compat.h>
+#include <linux/exportfs.h>
#include "ubifs-media.h"
/* Version of this UBIFS implementation */
--
2.12.0
