2 #include <linux/ext2_fs.h>
7 struct ext2_mount_options
{
8 unsigned long s_mount_opt
;
14 * second extended file system inode data in memory
16 struct ext2_inode_info
{
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.
36 /* block reservation info */
37 struct ext2_block_alloc_info
*i_block_alloc_info
;
39 __u32 i_dir_start_lookup
;
40 #ifdef CONFIG_EXT2_FS_XATTR
42 * Extended attributes can be read independently of the main file
43 * data. Taking i_mutex even when reading would cause contention
44 * between readers of EAs and writers of regular file data, so
45 * instead we synchronize on xattr_sem when reading or changing
48 struct rw_semaphore xattr_sem
;
50 #ifdef CONFIG_EXT2_FS_POSIX_ACL
51 struct posix_acl
*i_acl
;
52 struct posix_acl
*i_default_acl
;
57 * truncate_mutex is for serialising ext2_truncate() against
58 * ext2_getblock(). It also protects the internals of the inode's
59 * reservation data structures: ext2_reserve_window and
60 * ext2_reserve_window_node.
62 struct mutex truncate_mutex
;
63 struct inode vfs_inode
;
64 struct list_head i_orphan
; /* unlinked but open inodes */
68 * Inode dynamic state flags
70 #define EXT2_STATE_NEW 0x00000001 /* inode is newly created */
78 * Ok, these declarations are also in <linux/kernel.h> but none of the
79 * ext2 source programs needs to include it so they are duplicated here.
82 static inline struct ext2_inode_info
*EXT2_I(struct inode
*inode
)
84 return container_of(inode
, struct ext2_inode_info
, vfs_inode
);
88 extern int ext2_bg_has_super(struct super_block
*sb
, int group
);
89 extern unsigned long ext2_bg_num_gdb(struct super_block
*sb
, int group
);
90 extern ext2_fsblk_t
ext2_new_block(struct inode
*, unsigned long, int *);
91 extern ext2_fsblk_t
ext2_new_blocks(struct inode
*, unsigned long,
92 unsigned long *, int *);
93 extern void ext2_free_blocks (struct inode
*, unsigned long,
95 extern unsigned long ext2_count_free_blocks (struct super_block
*);
96 extern unsigned long ext2_count_dirs (struct super_block
*);
97 extern void ext2_check_blocks_bitmap (struct super_block
*);
98 extern struct ext2_group_desc
* ext2_get_group_desc(struct super_block
* sb
,
99 unsigned int block_group
,
100 struct buffer_head
** bh
);
101 extern void ext2_discard_reservation (struct inode
*);
102 extern int ext2_should_retry_alloc(struct super_block
*sb
, int *retries
);
103 extern void ext2_init_block_alloc_info(struct inode
*);
104 extern void ext2_rsv_window_add(struct super_block
*sb
, struct ext2_reserve_window_node
*rsv
);
107 extern int ext2_add_link (struct dentry
*, struct inode
*);
108 extern ino_t
ext2_inode_by_name(struct inode
*, struct dentry
*);
109 extern int ext2_make_empty(struct inode
*, struct inode
*);
110 extern struct ext2_dir_entry_2
* ext2_find_entry (struct inode
*,struct dentry
*, struct page
**);
111 extern int ext2_delete_entry (struct ext2_dir_entry_2
*, struct page
*);
112 extern int ext2_empty_dir (struct inode
*);
113 extern struct ext2_dir_entry_2
* ext2_dotdot (struct inode
*, struct page
**);
114 extern void ext2_set_link(struct inode
*, struct ext2_dir_entry_2
*, struct page
*, struct inode
*);
117 extern int ext2_sync_file (struct file
*, struct dentry
*, int);
120 extern struct inode
* ext2_new_inode (struct inode
*, int);
121 extern void ext2_free_inode (struct inode
*);
122 extern unsigned long ext2_count_free_inodes (struct super_block
*);
123 extern void ext2_check_inodes_bitmap (struct super_block
*);
124 extern unsigned long ext2_count_free (struct buffer_head
*, unsigned);
127 extern void ext2_read_inode (struct inode
*);
128 extern int ext2_write_inode (struct inode
*, int);
129 extern void ext2_put_inode (struct inode
*);
130 extern void ext2_delete_inode (struct inode
*);
131 extern int ext2_sync_inode (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 extern void ext2_get_inode_flags(struct ext2_inode_info
*);
139 extern int ext2_ioctl (struct inode
*, struct file
*, unsigned int,
141 extern long ext2_compat_ioctl(struct file
*, unsigned int, unsigned long);
144 struct dentry
*ext2_get_parent(struct dentry
*child
);
147 extern void ext2_error (struct super_block
*, const char *, const char *, ...)
148 __attribute__ ((format (printf
, 3, 4)));
149 extern void ext2_warning (struct super_block
*, const char *, const char *, ...)
150 __attribute__ ((format (printf
, 3, 4)));
151 extern void ext2_update_dynamic_rev (struct super_block
*sb
);
152 extern void ext2_write_super (struct super_block
*);
155 * Inodes and files operations
159 extern const struct file_operations ext2_dir_operations
;
162 extern const struct inode_operations ext2_file_inode_operations
;
163 extern const struct file_operations ext2_file_operations
;
164 extern const struct file_operations ext2_xip_file_operations
;
167 extern const struct address_space_operations ext2_aops
;
168 extern const struct address_space_operations ext2_aops_xip
;
169 extern const struct address_space_operations ext2_nobh_aops
;
172 extern const struct inode_operations ext2_dir_inode_operations
;
173 extern const struct inode_operations ext2_special_inode_operations
;
176 extern const struct inode_operations ext2_fast_symlink_inode_operations
;
177 extern const struct inode_operations ext2_symlink_inode_operations
;