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_put_inode (struct inode *); 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; 150 151 /* inode.c */ 152 extern struct address_space_operations ext2_aops; 153 extern struct address_space_operations ext2_nobh_aops; 154 155 /* namei.c */ 156 extern struct inode_operations ext2_dir_inode_operations; 157 extern struct inode_operations ext2_special_inode_operations; 158 159 /* symlink.c */ 160 extern struct inode_operations ext2_fast_symlink_inode_operations; 161 extern struct inode_operations ext2_symlink_inode_operations; 162