| /* |
| * direct.h - NILFS direct block pointer. |
| * |
| * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Written by Koji Sato <koji@osrg.net>. |
| */ |
| |
| #ifndef _NILFS_DIRECT_H |
| #define _NILFS_DIRECT_H |
| |
| #include <linux/types.h> |
| #include <linux/buffer_head.h> |
| #include "bmap.h" |
| |
| |
| /** |
| * struct nilfs_direct_node - direct node |
| * @dn_flags: flags |
| * @dn_pad: padding |
| */ |
| struct nilfs_direct_node { |
| __u8 dn_flags; |
| __u8 pad[7]; |
| }; |
| |
| #define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1) |
| #define NILFS_DIRECT_KEY_MIN 0 |
| #define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1) |
| |
| |
| int nilfs_direct_init(struct nilfs_bmap *); |
| int nilfs_direct_delete_and_convert(struct nilfs_bmap *, __u64, __u64 *, |
| __u64 *, int); |
| |
| |
| #endif /* _NILFS_DIRECT_H */ |
