Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/fs.h> |
2 | #include <linux/ext2_fs.h> | |
3 | ||
50a52234 JK |
4 | /* |
5 | * ext2 mount options | |
6 | */ | |
7 | struct ext2_mount_options { | |
8 | unsigned long s_mount_opt; | |
9 | uid_t s_resuid; | |
10 | gid_t s_resgid; | |
11 | }; | |
12 | ||
1da177e4 LT |
13 | /* |
14 | * second extended file system inode data in memory | |
15 | */ | |
16 | struct ext2_inode_info { | |
17 | __le32 i_data[15]; | |
18 | __u32 i_flags; | |
19 | __u32 i_faddr; | |
20 | __u8 i_frag_no; | |
21 | __u8 i_frag_size; | |
22 | __u16 i_state; | |
23 | __u32 i_file_acl; | |
24 | __u32 i_dir_acl; | |
25 | __u32 i_dtime; | |
26 | ||
27 | /* | |
28 | * i_block_group is the number of the block group which contains | |
29 | * this file's inode. Constant across the lifetime of the inode, | |
30 | * it is ued for making block allocation decisions - we try to | |
31 | * place a file's data blocks near its inode block, and new inodes | |
32 | * near to their parent directory's inode. | |
33 | */ | |
34 | __u32 i_block_group; | |
35 | ||
36 | /* | |
37 | * i_next_alloc_block is the logical (file-relative) number of the | |
38 | * most-recently-allocated block in this file. Yes, it is misnamed. | |
39 | * We use this for detecting linearly ascending allocation requests. | |
40 | */ | |
41 | __u32 i_next_alloc_block; | |
42 | ||
43 | /* | |
44 | * i_next_alloc_goal is the *physical* companion to i_next_alloc_block. | |
45 | * it the the physical block number of the block which was most-recently | |
46 | * allocated to this file. This give us the goal (target) for the next | |
47 | * allocation when we detect linearly ascending requests. | |
48 | */ | |
49 | __u32 i_next_alloc_goal; | |
50 | __u32 i_prealloc_block; | |
51 | __u32 i_prealloc_count; | |
52 | __u32 i_dir_start_lookup; | |
53 | #ifdef CONFIG_EXT2_FS_XATTR | |
54 | /* | |
55 | * Extended attributes can be read independently of the main file | |
1b1dcc1b | 56 | * data. Taking i_mutex even when reading would cause contention |
1da177e4 LT |
57 | * between readers of EAs and writers of regular file data, so |
58 | * instead we synchronize on xattr_sem when reading or changing | |
59 | * EAs. | |
60 | */ | |
61 | struct rw_semaphore xattr_sem; | |
62 | #endif | |
63 | #ifdef CONFIG_EXT2_FS_POSIX_ACL | |
64 | struct posix_acl *i_acl; | |
65 | struct posix_acl *i_default_acl; | |
66 | #endif | |
67 | rwlock_t i_meta_lock; | |
68 | struct inode vfs_inode; | |
69 | }; | |
70 | ||
71 | /* | |
72 | * Inode dynamic state flags | |
73 | */ | |
74 | #define EXT2_STATE_NEW 0x00000001 /* inode is newly created */ | |
75 | ||
76 | ||
77 | /* | |
78 | * Function prototypes | |
79 | */ | |
80 | ||
81 | /* | |
82 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
83 | * ext2 source programs needs to include it so they are duplicated here. | |
84 | */ | |
85 | ||
86 | static inline struct ext2_inode_info *EXT2_I(struct inode *inode) | |
87 | { | |
88 | return container_of(inode, struct ext2_inode_info, vfs_inode); | |
89 | } | |
90 | ||
91 | /* balloc.c */ | |
92 | extern int ext2_bg_has_super(struct super_block *sb, int group); | |
93 | extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); | |
94 | extern int ext2_new_block (struct inode *, unsigned long, | |
95 | __u32 *, __u32 *, int *); | |
96 | extern void ext2_free_blocks (struct inode *, unsigned long, | |
97 | unsigned long); | |
98 | extern unsigned long ext2_count_free_blocks (struct super_block *); | |
99 | extern unsigned long ext2_count_dirs (struct super_block *); | |
100 | extern void ext2_check_blocks_bitmap (struct super_block *); | |
101 | extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, | |
102 | unsigned int block_group, | |
103 | struct buffer_head ** bh); | |
104 | ||
105 | /* dir.c */ | |
106 | extern int ext2_add_link (struct dentry *, struct inode *); | |
107 | extern ino_t ext2_inode_by_name(struct inode *, struct dentry *); | |
108 | extern int ext2_make_empty(struct inode *, struct inode *); | |
109 | extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct dentry *, struct page **); | |
110 | extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *); | |
111 | extern int ext2_empty_dir (struct inode *); | |
112 | extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); | |
113 | extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *); | |
114 | ||
115 | /* fsync.c */ | |
116 | extern int ext2_sync_file (struct file *, struct dentry *, int); | |
117 | ||
118 | /* ialloc.c */ | |
119 | extern struct inode * ext2_new_inode (struct inode *, int); | |
120 | extern void ext2_free_inode (struct inode *); | |
121 | extern unsigned long ext2_count_free_inodes (struct super_block *); | |
122 | extern void ext2_check_inodes_bitmap (struct super_block *); | |
123 | extern unsigned long ext2_count_free (struct buffer_head *, unsigned); | |
124 | ||
125 | /* inode.c */ | |
126 | extern void ext2_read_inode (struct inode *); | |
127 | extern int ext2_write_inode (struct inode *, int); | |
e072c6f2 | 128 | extern void ext2_put_inode (struct inode *); |
1da177e4 LT |
129 | extern void ext2_delete_inode (struct inode *); |
130 | extern int ext2_sync_inode (struct inode *); | |
131 | extern void ext2_discard_prealloc (struct inode *); | |
132 | extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); | |
133 | extern void ext2_truncate (struct inode *); | |
134 | extern int ext2_setattr (struct dentry *, struct iattr *); | |
135 | extern void ext2_set_inode_flags(struct inode *inode); | |
136 | ||
137 | /* ioctl.c */ | |
138 | extern int ext2_ioctl (struct inode *, struct file *, unsigned int, | |
139 | unsigned long); | |
140 | ||
2c221290 AB |
141 | /* namei.c */ |
142 | struct dentry *ext2_get_parent(struct dentry *child); | |
143 | ||
1da177e4 LT |
144 | /* super.c */ |
145 | extern void ext2_error (struct super_block *, const char *, const char *, ...) | |
146 | __attribute__ ((format (printf, 3, 4))); | |
147 | extern void ext2_warning (struct super_block *, const char *, const char *, ...) | |
148 | __attribute__ ((format (printf, 3, 4))); | |
149 | extern void ext2_update_dynamic_rev (struct super_block *sb); | |
150 | extern void ext2_write_super (struct super_block *); | |
151 | ||
152 | /* | |
153 | * Inodes and files operations | |
154 | */ | |
155 | ||
156 | /* dir.c */ | |
4b6f5d20 | 157 | extern const struct file_operations ext2_dir_operations; |
1da177e4 LT |
158 | |
159 | /* file.c */ | |
160 | extern struct inode_operations ext2_file_inode_operations; | |
4b6f5d20 AV |
161 | extern const struct file_operations ext2_file_operations; |
162 | extern const struct file_operations ext2_xip_file_operations; | |
1da177e4 LT |
163 | |
164 | /* inode.c */ | |
f5e54d6e CH |
165 | extern const struct address_space_operations ext2_aops; |
166 | extern const struct address_space_operations ext2_aops_xip; | |
167 | extern const struct address_space_operations ext2_nobh_aops; | |
1da177e4 LT |
168 | |
169 | /* namei.c */ | |
170 | extern struct inode_operations ext2_dir_inode_operations; | |
171 | extern struct inode_operations ext2_special_inode_operations; | |
172 | ||
173 | /* symlink.c */ | |
174 | extern struct inode_operations ext2_fast_symlink_inode_operations; | |
175 | extern struct inode_operations ext2_symlink_inode_operations; |