]>
Commit | Line | Data |
---|---|---|
65b4643d RK |
1 | /* |
2 | * sb.h - NILFS on-memory super block structure. | |
3 | * | |
4 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | * | |
20 | * Written by Ryusuke Konishi <ryusuke@osrg.net> | |
21 | * | |
22 | */ | |
23 | ||
24 | #ifndef _NILFS_SB | |
25 | #define _NILFS_SB | |
26 | ||
27 | #include <linux/types.h> | |
28 | #include <linux/fs.h> | |
29 | ||
30 | /* | |
31 | * Mount options | |
32 | */ | |
33 | struct nilfs_mount_options { | |
34 | unsigned long mount_opt; | |
35 | __u64 snapshot_cno; | |
36 | }; | |
37 | ||
38 | struct the_nilfs; | |
39 | struct nilfs_sc_info; | |
40 | ||
41 | /* | |
42 | * NILFS super-block data in memory | |
43 | */ | |
44 | struct nilfs_sb_info { | |
65b4643d RK |
45 | /* Mount options */ |
46 | unsigned long s_mount_opt; | |
47 | uid_t s_resuid; | |
48 | gid_t s_resgid; | |
49 | ||
50 | unsigned long s_interval; /* construction interval */ | |
51 | unsigned long s_watermark; /* threshold of data amount | |
52 | for the segment construction */ | |
53 | ||
54 | /* Fundamental members */ | |
55 | struct super_block *s_super; /* reverse pointer to super_block */ | |
56 | struct the_nilfs *s_nilfs; | |
65b4643d RK |
57 | |
58 | /* Segment constructor */ | |
59 | struct list_head s_dirty_files; /* dirty files list */ | |
60 | struct nilfs_sc_info *s_sc_info; /* segment constructor info */ | |
61 | spinlock_t s_inode_lock; /* Lock for the nilfs inode. | |
62 | It covers s_dirty_files list */ | |
63 | ||
65b4643d RK |
64 | /* Inode allocator */ |
65 | spinlock_t s_next_gen_lock; | |
66 | u32 s_next_generation; | |
67 | }; | |
68 | ||
69 | static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb) | |
70 | { | |
71 | return sb->s_fs_info; | |
72 | } | |
73 | ||
74 | static inline struct nilfs_sc_info *NILFS_SC(struct nilfs_sb_info *sbi) | |
75 | { | |
76 | return sbi->s_sc_info; | |
77 | } | |
78 | ||
79 | /* | |
80 | * Bit operations for the mount option | |
81 | */ | |
82 | #define nilfs_clear_opt(sbi, opt) \ | |
83 | do { (sbi)->s_mount_opt &= ~NILFS_MOUNT_##opt; } while (0) | |
84 | #define nilfs_set_opt(sbi, opt) \ | |
85 | do { (sbi)->s_mount_opt |= NILFS_MOUNT_##opt; } while (0) | |
86 | #define nilfs_test_opt(sbi, opt) ((sbi)->s_mount_opt & NILFS_MOUNT_##opt) | |
87 | #define nilfs_write_opt(sbi, mask, opt) \ | |
88 | do { (sbi)->s_mount_opt = \ | |
89 | (((sbi)->s_mount_opt & ~NILFS_MOUNT_##mask) | \ | |
90 | NILFS_MOUNT_##opt); \ | |
91 | } while (0) | |
92 | ||
93 | #endif /* _NILFS_SB */ |