affs_copy_name
extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
affs_copy_name(AFFS_TAIL(sb, bh)->name, new_dentry);
affs_copy_name(AFFS_TAIL(sb, bh_old)->name, new_dentry);
affs_copy_name(AFFS_TAIL(sb, bh_new)->name, old_dentry);