aufs: inode op, rename 2/2, body

Implement i_op->rename().
This is a big monster and I don't like it.

In this version, the copy-up always happen.
Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>

fs/aufs/Makefile

@@ -17,7 +17,7 @@ aufs-y := module.o sbinfo.o super.o branch.o xino.o sysaufs.o opts.o \
 	dynop.o \
 	finfo.o file.o \
 	dir.o vdir.o \
-	iinfo.o inode.o i_op.o i_op_add.o i_op_del.o
+	iinfo.o inode.o i_op.o i_op_add.o i_op_del.o i_op_ren.o
 
 # all are boolean
 aufs-$(CONFIG_PROC_FS) += procfs.o plink.o

fs/aufs/i_op.c

@@ -652,6 +652,7 @@ struct inode_operations aufs_iop[] = {
 		.mkdir		= aufs_mkdir,
 		.rmdir		= aufs_rmdir,
 		.mknod		= aufs_mknod,
+		.rename		= aufs_rename,
 
 		.permission	= aufs_permission,
 

fs/aufs/inode.h

@@ -179,6 +179,12 @@ int au_may_del(struct dentry *dentry, aufs_bindex_t bindex,
 int aufs_unlink(struct inode *dir, struct dentry *dentry);
 int aufs_rmdir(struct inode *dir, struct dentry *dentry);
 
+/* i_op_ren.c */
+int au_wbr(struct dentry *dentry, aufs_bindex_t btgt);
+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
+		struct inode *dir, struct dentry *dentry,
+		unsigned int flags);
+
 /* iinfo.c */
 struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex);
 void au_hiput(struct au_hinode *hinode);