| #include <linux/fs.h> |
| #include <linux/ext2_fs.h> |
| |
| /* |
| * ext2 mount options |
| */ |
| struct ext2_mount_options { |
| unsigned long s_mount_opt; |
| uid_t s_resuid; |
| gid_t s_resgid; |
| }; |
| |
| /* |
| * second extended file system inode data in memory |
| */ |
| struct ext2_inode_info { |
| __le32 i_data[15]; |
| __u32 i_flags; |
| __u32 i_faddr; |
| __u8 i_frag_no; |
| __u8 i_frag_size; |
| __u16 i_state; |
| __u32 i_file_acl; |
| __u32 i_dir_acl; |
| __u32 i_dtime; |
| |
| /* |
| * i_block_group is the number of the block group which contains |
| * this file's inode. Constant across the lifetime of the inode, |
| * it is used for making block allocation decisions - we try to |
| * place a file's data blocks near its inode block, and new inodes |
| * near to their parent directory's inode. |
| */ |
| __u32 i_block_group; |
| |
| /* block reservation info */ |
| struct ext2_block_alloc_info *i_block_alloc_info; |
| |
| __u32 i_dir_start_lookup; |
| #ifdef CONFIG_EXT2_FS_XATTR |
| /* |
| * Extended attributes can be read independently of the main file |
| * data. Taking i_mutex even when reading would cause contention |
| * between readers of EAs and writers of regular file data, so |
| * instead we synchronize on xattr_sem when reading or changing |
| * EAs. |
| */ |
| struct rw_semaphore xattr_sem; |
| #endif |
| rwlock_t i_meta_lock; |
| |
| /* |
| * truncate_mutex is for serialising ext2_truncate() against |
| * ext2_getblock(). It also protects the internals of the inode's |
| * reservation data structures: ext2_reserve_window and |
| * ext2_reserve_window_node. |
| */ |
| struct mutex truncate_mutex; |
| struct inode vfs_inode; |
| struct list_head i_orphan; /* unlinked but open inodes */ |
| }; |
| |
| /* |
| * Inode dynamic state flags |
| */ |
| #define EXT2_STATE_NEW 0x00000001 /* inode is newly created */ |
| |
| |
| /* |
| * Function prototypes |
| */ |
| |
| /* |
| * Ok, these declarations are also in <linux/kernel.h> but none of the |
| * ext2 source programs needs to include it so they are duplicated here. |
| */ |
| |
| static inline struct ext2_inode_info *EXT2_I(struct inode *inode) |
| { |
| return container_of(inode, struct ext2_inode_info, vfs_inode); |
| } |
| |
| /* balloc.c */ |
| extern int ext2_bg_has_super(struct super_block *sb, int group); |
| extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); |
| extern ext2_fsblk_t ext2_new_block(struct inode *, unsigned long, int *); |
| extern ext2_fsblk_t ext2_new_blocks(struct inode *, unsigned long, |
| unsigned long *, int *); |
| extern void ext2_free_blocks (struct inode *, unsigned long, |
| unsigned long); |
| extern unsigned long ext2_count_free_blocks (struct super_block *); |
| extern unsigned long ext2_count_dirs (struct super_block *); |
| extern void ext2_check_blocks_bitmap (struct super_block *); |
| extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, |
| unsigned int block_group, |
| struct buffer_head ** bh); |
| extern void ext2_discard_reservation (struct inode *); |
| extern int ext2_should_retry_alloc(struct super_block *sb, int *retries); |
| extern void ext2_init_block_alloc_info(struct inode *); |
| extern void ext2_rsv_window_add(struct super_block *sb, struct ext2_reserve_window_node *rsv); |
| |
| /* dir.c */ |
| extern int ext2_add_link (struct dentry *, struct inode *); |
| extern ino_t ext2_inode_by_name(struct inode *, struct qstr *); |
| extern int ext2_make_empty(struct inode *, struct inode *); |
| extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct qstr *, struct page **); |
| extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *); |
| extern int ext2_empty_dir (struct inode *); |
| extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); |
| extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int); |
| |
| /* ialloc.c */ |
| extern struct inode * ext2_new_inode (struct inode *, int, const struct qstr *); |
| extern void ext2_free_inode (struct inode *); |
| extern unsigned long ext2_count_free_inodes (struct super_block *); |
| extern void ext2_check_inodes_bitmap (struct super_block *); |
| extern unsigned long ext2_count_free (struct buffer_head *, unsigned); |
| |
| /* inode.c */ |
| extern struct inode *ext2_iget (struct super_block *, unsigned long); |
| extern int ext2_write_inode (struct inode *, struct writeback_control *); |
| extern void ext2_evict_inode(struct inode *); |
| extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); |
| extern int ext2_setattr (struct dentry *, struct iattr *); |
| extern void ext2_set_inode_flags(struct inode *inode); |
| extern void ext2_get_inode_flags(struct ext2_inode_info *); |
| extern int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| u64 start, u64 len); |
| |
| /* ioctl.c */ |
| extern long ext2_ioctl(struct file *, unsigned int, unsigned long); |
| extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long); |
| |
| /* namei.c */ |
| struct dentry *ext2_get_parent(struct dentry *child); |
| |
| /* super.c */ |
| extern __printf(3, 4) |
| void ext2_error(struct super_block *, const char *, const char *, ...); |
| extern __printf(3, 4) |
| void ext2_msg(struct super_block *, const char *, const char *, ...); |
| extern void ext2_update_dynamic_rev (struct super_block *sb); |
| extern void ext2_write_super (struct super_block *); |
| |
| /* |
| * Inodes and files operations |
| */ |
| |
| /* dir.c */ |
| extern const struct file_operations ext2_dir_operations; |
| |
| /* file.c */ |
| extern int ext2_fsync(struct file *file, loff_t start, loff_t end, |
| int datasync); |
| extern const struct inode_operations ext2_file_inode_operations; |
| extern const struct file_operations ext2_file_operations; |
| extern const struct file_operations ext2_xip_file_operations; |
| |
| /* inode.c */ |
| extern const struct address_space_operations ext2_aops; |
| extern const struct address_space_operations ext2_aops_xip; |
| extern const struct address_space_operations ext2_nobh_aops; |
| |
| /* namei.c */ |
| extern const struct inode_operations ext2_dir_inode_operations; |
| extern const struct inode_operations ext2_special_inode_operations; |
| |
| /* symlink.c */ |
| extern const struct inode_operations ext2_fast_symlink_inode_operations; |
| extern const struct inode_operations ext2_symlink_inode_operations; |
| |
| static inline ext2_fsblk_t |
| ext2_group_first_block_no(struct super_block *sb, unsigned long group_no) |
| { |
| return group_no * (ext2_fsblk_t)EXT2_BLOCKS_PER_GROUP(sb) + |
| le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block); |
| } |
| |
| #define ext2_set_bit __test_and_set_bit_le |
| #define ext2_clear_bit __test_and_clear_bit_le |
| #define ext2_test_bit test_bit_le |
| #define ext2_find_first_zero_bit find_first_zero_bit_le |
| #define ext2_find_next_zero_bit find_next_zero_bit_le |
