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1da177e4 LT |
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); | |
e072c6f2 | 119 | extern void ext2_put_inode (struct inode *); |
1da177e4 LT |
120 | extern void ext2_delete_inode (struct inode *); |
121 | extern int ext2_sync_inode (struct inode *); | |
122 | extern void ext2_discard_prealloc (struct inode *); | |
123 | extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); | |
124 | extern void ext2_truncate (struct inode *); | |
125 | extern int ext2_setattr (struct dentry *, struct iattr *); | |
126 | extern void ext2_set_inode_flags(struct inode *inode); | |
127 | ||
128 | /* ioctl.c */ | |
129 | extern int ext2_ioctl (struct inode *, struct file *, unsigned int, | |
130 | unsigned long); | |
131 | ||
132 | /* super.c */ | |
133 | extern void ext2_error (struct super_block *, const char *, const char *, ...) | |
134 | __attribute__ ((format (printf, 3, 4))); | |
135 | extern void ext2_warning (struct super_block *, const char *, const char *, ...) | |
136 | __attribute__ ((format (printf, 3, 4))); | |
137 | extern void ext2_update_dynamic_rev (struct super_block *sb); | |
138 | extern void ext2_write_super (struct super_block *); | |
139 | ||
140 | /* | |
141 | * Inodes and files operations | |
142 | */ | |
143 | ||
144 | /* dir.c */ | |
145 | extern struct file_operations ext2_dir_operations; | |
146 | ||
147 | /* file.c */ | |
148 | extern struct inode_operations ext2_file_inode_operations; | |
149 | extern struct file_operations ext2_file_operations; | |
6d79125b | 150 | extern struct file_operations ext2_xip_file_operations; |
1da177e4 LT |
151 | |
152 | /* inode.c */ | |
153 | extern struct address_space_operations ext2_aops; | |
6d79125b | 154 | extern struct address_space_operations ext2_aops_xip; |
1da177e4 LT |
155 | extern struct address_space_operations ext2_nobh_aops; |
156 | ||
157 | /* namei.c */ | |
158 | extern struct inode_operations ext2_dir_inode_operations; | |
159 | extern struct inode_operations ext2_special_inode_operations; | |
160 | ||
161 | /* symlink.c */ | |
162 | extern struct inode_operations ext2_fast_symlink_inode_operations; | |
163 | extern struct inode_operations ext2_symlink_inode_operations; |