Signed-off-by: Richard Weinberger <richard@xxxxxx>
---
fs/ubifs/super.c | 31 +++++++++++++++++++++++++++++++
fs/ubifs/ubifs.h | 1 +
2 files changed, 32 insertions(+)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index c50952f43e36..be5b697d8214 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2006,6 +2006,37 @@ 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 e1b7531650af..8b0ac0a8afea 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -41,6 +41,7 @@
#include <linux/fscrypto.h>
#include <linux/random.h>
#include <linux/compat.h>
+#include <linux/exportfs.h>
#include "ubifs-media.h"
/* Version of this UBIFS implementation */
--
2.7.3
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