diff options
Diffstat (limited to 'fs/ext2/ext2.h')
| -rw-r--r-- | fs/ext2/ext2.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h new file mode 100644 index 0000000..9f1a40e --- /dev/null +++ b/fs/ext2/ext2.h @@ -0,0 +1,160 @@ +#include <linux/fs.h> +#include <linux/ext2_fs.h> + +/* + * 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 ued 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; + + /* + * i_next_alloc_block is the logical (file-relative) number of the + * most-recently-allocated block in this file. Yes, it is misnamed. + * We use this for detecting linearly ascending allocation requests. + */ + __u32 i_next_alloc_block; + + /* + * i_next_alloc_goal is the *physical* companion to i_next_alloc_block. + * it the the physical block number of the block which was most-recently + * allocated to this file. This give us the goal (target) for the next + * allocation when we detect linearly ascending requests. + */ + __u32 i_next_alloc_goal; + __u32 i_prealloc_block; + __u32 i_prealloc_count; + __u32 i_dir_start_lookup; +#ifdef CONFIG_EXT2_FS_XATTR + /* + * Extended attributes can be read independently of the main file + * data. Taking i_sem 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 +#ifdef CONFIG_EXT2_FS_POSIX_ACL + struct posix_acl *i_acl; + struct posix_acl *i_default_acl; +#endif + rwlock_t i_meta_lock; + struct inode vfs_inode; +}; + +/* + * 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 int ext2_new_block (struct inode *, unsigned long, + __u32 *, __u32 *, 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); + +/* dir.c */ +extern int ext2_add_link (struct dentry *, struct inode *); +extern ino_t ext2_inode_by_name(struct inode *, struct dentry *); +extern int ext2_make_empty(struct inode *, struct inode *); +extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct dentry *, 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 *); + +/* fsync.c */ +extern int ext2_sync_file (struct file *, struct dentry *, int); + +/* ialloc.c */ +extern struct inode * ext2_new_inode (struct inode *, int); +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 void ext2_read_inode (struct inode *); +extern int ext2_write_inode (struct inode *, int); +extern void ext2_delete_inode (struct inode *); +extern int ext2_sync_inode (struct inode *); +extern void ext2_discard_prealloc (struct inode *); +extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); +extern void ext2_truncate (struct inode *); +extern int ext2_setattr (struct dentry *, struct iattr *); +extern void ext2_set_inode_flags(struct inode *inode); + +/* ioctl.c */ +extern int ext2_ioctl (struct inode *, struct file *, unsigned int, + unsigned long); + +/* super.c */ +extern void ext2_error (struct super_block *, const char *, const char *, ...) + __attribute__ ((format (printf, 3, 4))); +extern void ext2_warning (struct super_block *, const char *, const char *, ...) + __attribute__ ((format (printf, 3, 4))); +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 struct file_operations ext2_dir_operations; + +/* file.c */ +extern struct inode_operations ext2_file_inode_operations; +extern struct file_operations ext2_file_operations; + +/* inode.c */ +extern struct address_space_operations ext2_aops; +extern struct address_space_operations ext2_nobh_aops; + +/* namei.c */ +extern struct inode_operations ext2_dir_inode_operations; +extern struct inode_operations ext2_special_inode_operations; + +/* symlink.c */ +extern struct inode_operations ext2_fast_symlink_inode_operations; +extern struct inode_operations ext2_symlink_inode_operations; |
