Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/fs.h> |
| 2 | #include <linux/ext2_fs.h> |
| 3 | |
| 4 | /* |
Jan Kara | 50a5223 | 2005-07-12 13:58:29 -0700 | [diff] [blame] | 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 | |
| 13 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 56 | * data. Taking i_mutex even when reading would cause contention |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Bernard Blackham | e072c6f | 2005-04-16 15:25:45 -0700 | [diff] [blame] | 128 | extern void ext2_put_inode (struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
David Howells | e322ff0 | 2006-08-29 19:06:20 +0100 | [diff] [blame] | 140 | extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Adrian Bunk | 2c22129 | 2006-03-24 03:15:53 -0800 | [diff] [blame] | 142 | /* namei.c */ |
| 143 | struct dentry *ext2_get_parent(struct dentry *child); |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /* super.c */ |
| 146 | extern void ext2_error (struct super_block *, const char *, const char *, ...) |
| 147 | __attribute__ ((format (printf, 3, 4))); |
| 148 | extern void ext2_warning (struct super_block *, const char *, const char *, ...) |
| 149 | __attribute__ ((format (printf, 3, 4))); |
| 150 | extern void ext2_update_dynamic_rev (struct super_block *sb); |
| 151 | extern void ext2_write_super (struct super_block *); |
| 152 | |
| 153 | /* |
| 154 | * Inodes and files operations |
| 155 | */ |
| 156 | |
| 157 | /* dir.c */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 158 | extern const struct file_operations ext2_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | /* file.c */ |
| 161 | extern struct inode_operations ext2_file_inode_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 162 | extern const struct file_operations ext2_file_operations; |
| 163 | extern const struct file_operations ext2_xip_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | /* inode.c */ |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 166 | extern const struct address_space_operations ext2_aops; |
| 167 | extern const struct address_space_operations ext2_aops_xip; |
| 168 | extern const struct address_space_operations ext2_nobh_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* namei.c */ |
| 171 | extern struct inode_operations ext2_dir_inode_operations; |
| 172 | extern struct inode_operations ext2_special_inode_operations; |
| 173 | |
| 174 | /* symlink.c */ |
| 175 | extern struct inode_operations ext2_fast_symlink_inode_operations; |
| 176 | extern struct inode_operations ext2_symlink_inode_operations; |