2 * sb.h - NILFS on-memory super block structure.
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Written by Ryusuke Konishi <ryusuke@osrg.net>
27 #include <linux/types.h>
34 * NILFS super-block data in memory
36 struct nilfs_sb_info {
40 unsigned long s_interval; /* construction interval */
41 unsigned long s_watermark; /* threshold of data amount
42 for the segment construction */
44 /* Fundamental members */
45 struct super_block *s_super; /* reverse pointer to super_block */
46 struct the_nilfs *s_nilfs;
48 /* Segment constructor */
49 struct list_head s_dirty_files; /* dirty files list */
50 struct nilfs_sc_info *s_sc_info; /* segment constructor info */
51 spinlock_t s_inode_lock; /* Lock for the nilfs inode.
52 It covers s_dirty_files list */
55 spinlock_t s_next_gen_lock;
56 u32 s_next_generation;
59 static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb)
64 static inline struct nilfs_sc_info *NILFS_SC(struct nilfs_sb_info *sbi)
66 return sbi->s_sc_info;
69 #endif /* _NILFS_SB */