diff options
Diffstat (limited to 'fs/ext2/ext2.h')
-rw-r--r-- | fs/ext2/ext2.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h new file mode 100644 index 000000000000..9f1a40e7945c --- /dev/null +++ b/fs/ext2/ext2.h | |||
@@ -0,0 +1,160 @@ | |||
1 | #include <linux/fs.h> | ||
2 | #include <linux/ext2_fs.h> | ||
3 | |||
4 | /* | ||
5 | * second extended file system inode data in memory | ||
6 | */ | ||
7 | struct ext2_inode_info { | ||
8 | __le32 i_data[15]; | ||
9 | __u32 i_flags; | ||
10 | __u32 i_faddr; | ||
11 | __u8 i_frag_no; | ||
12 | __u8 i_frag_size; | ||
13 | __u16 i_state; | ||
14 | __u32 i_file_acl; | ||
15 | __u32 i_dir_acl; | ||
16 | __u32 i_dtime; | ||
17 | |||
18 | /* | ||
19 | * i_block_group is the number of the block group which contains | ||
20 | * this file's inode. Constant across the lifetime of the inode, | ||
21 | * it is ued for making block allocation decisions - we try to | ||
22 | * place a file's data blocks near its inode block, and new inodes | ||
23 | * near to their parent directory's inode. | ||
24 | */ | ||
25 | __u32 i_block_group; | ||
26 | |||
27 | /* | ||
28 | * i_next_alloc_block is the logical (file-relative) number of the | ||
29 | * most-recently-allocated block in this file. Yes, it is misnamed. | ||
30 | * We use this for detecting linearly ascending allocation requests. | ||
31 | */ | ||
32 | __u32 i_next_alloc_block; | ||
33 | |||
34 | /* | ||
35 | * i_next_alloc_goal is the *physical* companion to i_next_alloc_block. | ||
36 | * it the the physical block number of the block which was most-recently | ||
37 | * allocated to this file. This give us the goal (target) for the next | ||
38 | * allocation when we detect linearly ascending requests. | ||
39 | */ | ||
40 | __u32 i_next_alloc_goal; | ||
41 | __u32 i_prealloc_block; | ||
42 | __u32 i_prealloc_count; | ||
43 | __u32 i_dir_start_lookup; | ||
44 | #ifdef CONFIG_EXT2_FS_XATTR | ||
45 | /* | ||
46 | * Extended attributes can be read independently of the main file | ||
47 | * data. Taking i_sem even when reading would cause contention | ||
48 | * between readers of EAs and writers of regular file data, so | ||
49 | * instead we synchronize on xattr_sem when reading or changing | ||
50 | * EAs. | ||
51 | */ | ||
52 | struct rw_semaphore xattr_sem; | ||
53 | #endif | ||
54 | #ifdef CONFIG_EXT2_FS_POSIX_ACL | ||
55 | struct posix_acl *i_acl; | ||
56 | struct posix_acl *i_default_acl; | ||
57 | #endif | ||
58 | rwlock_t i_meta_lock; | ||
59 | struct inode vfs_inode; | ||
60 | }; | ||
61 | |||
62 | /* | ||
63 | * Inode dynamic state flags | ||
64 | */ | ||
65 | #define EXT2_STATE_NEW 0x00000001 /* inode is newly created */ | ||
66 | |||
67 | |||
68 | /* | ||
69 | * Function prototypes | ||
70 | */ | ||
71 | |||
72 | /* | ||
73 | * Ok, these declarations are also in <linux/kernel.h> but none of the | ||
74 | * ext2 source programs needs to include it so they are duplicated here. | ||
75 | */ | ||
76 | |||
77 | static inline struct ext2_inode_info *EXT2_I(struct inode *inode) | ||
78 | { | ||
79 | return container_of(inode, struct ext2_inode_info, vfs_inode); | ||
80 | } | ||
81 | |||
82 | /* balloc.c */ | ||
83 | extern int ext2_bg_has_super(struct super_block *sb, int group); | ||
84 | extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); | ||
85 | extern int ext2_new_block (struct inode *, unsigned long, | ||
86 | __u32 *, __u32 *, int *); | ||
87 | extern void ext2_free_blocks (struct inode *, unsigned long, | ||
88 | unsigned long); | ||
89 | extern unsigned long ext2_count_free_blocks (struct super_block *); | ||
90 | extern unsigned long ext2_count_dirs (struct super_block *); | ||
91 | extern void ext2_check_blocks_bitmap (struct super_block *); | ||
92 | extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, | ||
93 | unsigned int block_group, | ||
94 | struct buffer_head ** bh); | ||
95 | |||
96 | /* dir.c */ | ||
97 | extern int ext2_add_link (struct dentry *, struct inode *); | ||
98 | extern ino_t ext2_inode_by_name(struct inode *, struct dentry *); | ||
99 | extern int ext2_make_empty(struct inode *, struct inode *); | ||
100 | extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct dentry *, struct page **); | ||
101 | extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *); | ||
102 | extern int ext2_empty_dir (struct inode *); | ||
103 | extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); | ||
104 | extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *); | ||
105 | |||
106 | /* fsync.c */ | ||
107 | extern int ext2_sync_file (struct file *, struct dentry *, int); | ||
108 | |||
109 | /* ialloc.c */ | ||
110 | extern struct inode * ext2_new_inode (struct inode *, int); | ||
111 | extern void ext2_free_inode (struct inode *); | ||
112 | extern unsigned long ext2_count_free_inodes (struct super_block *); | ||
113 | extern void ext2_check_inodes_bitmap (struct super_block *); | ||
114 | extern unsigned long ext2_count_free (struct buffer_head *, unsigned); | ||
115 | |||
116 | /* inode.c */ | ||
117 | extern void ext2_read_inode (struct inode *); | ||
118 | extern int ext2_write_inode (struct inode *, int); | ||
119 | extern void ext2_delete_inode (struct inode *); | ||
120 | extern int ext2_sync_inode (struct inode *); | ||
121 | extern void ext2_discard_prealloc (struct inode *); | ||
122 | extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); | ||
123 | extern void ext2_truncate (struct inode *); | ||
124 | extern int ext2_setattr (struct dentry *, struct iattr *); | ||
125 | extern void ext2_set_inode_flags(struct inode *inode); | ||
126 | |||
127 | /* ioctl.c */ | ||
128 | extern int ext2_ioctl (struct inode *, struct file *, unsigned int, | ||
129 | unsigned long); | ||
130 | |||
131 | /* super.c */ | ||
132 | extern void ext2_error (struct super_block *, const char *, const char *, ...) | ||
133 | __attribute__ ((format (printf, 3, 4))); | ||
134 | extern void ext2_warning (struct super_block *, const char *, const char *, ...) | ||
135 | __attribute__ ((format (printf, 3, 4))); | ||
136 | extern void ext2_update_dynamic_rev (struct super_block *sb); | ||
137 | extern void ext2_write_super (struct super_block *); | ||
138 | |||
139 | /* | ||
140 | * Inodes and files operations | ||
141 | */ | ||
142 | |||
143 | /* dir.c */ | ||
144 | extern struct file_operations ext2_dir_operations; | ||
145 | |||
146 | /* file.c */ | ||
147 | extern struct inode_operations ext2_file_inode_operations; | ||
148 | extern struct file_operations ext2_file_operations; | ||
149 | |||
150 | /* inode.c */ | ||
151 | extern struct address_space_operations ext2_aops; | ||
152 | extern struct address_space_operations ext2_nobh_aops; | ||
153 | |||
154 | /* namei.c */ | ||
155 | extern struct inode_operations ext2_dir_inode_operations; | ||
156 | extern struct inode_operations ext2_special_inode_operations; | ||
157 | |||
158 | /* symlink.c */ | ||
159 | extern struct inode_operations ext2_fast_symlink_inode_operations; | ||
160 | extern struct inode_operations ext2_symlink_inode_operations; | ||