d_real
if (op->d_real)
.d_real = ovl_d_real,
.d_real = ovl_d_real,
return d_real(lower, type);
struct dentry *(*d_real)(struct dentry *, enum d_real_type type);
return dentry->d_op->d_real(dentry, type);
return d_inode(d_real((struct dentry *) dentry, D_REAL_DATA));
struct inode *inode = d_inode(d_real(dentry, D_REAL_METADATA));
metadata_inode = d_inode(d_real(file_dentry(file),