| /* |
| * The ext filesystem constants/structures |
| */ |
| |
| #ifndef _EXT_FS_H |
| #define _EXT_FS_H |
| |
| #include <sys/types.h> |
| |
| /* |
| * Free blocks/inodes management style |
| * |
| * One of these two constants must be defined |
| * |
| */ |
| /* #define EXTFS_BITMAP */ /* use a bitmap */ |
| #define EXTFS_FREELIST /* use a linked list */ |
| |
| #define EXT_NAME_LEN 255 |
| #define EXT_ROOT_INO 1 |
| |
| #define EXT_I_MAP_SLOTS 8 |
| #define EXT_Z_MAP_SLOTS 8 |
| #define EXT_SUPER_MAGIC 0x137D |
| |
| #define EXT_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct ext_inode))) |
| /* #define EXT_DIR_ENTRIES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct ext_dir_entry))) */ |
| |
| struct ext_inode { |
| unsigned short i_mode; |
| unsigned short i_uid; |
| unsigned long i_size; |
| unsigned long i_time; |
| unsigned short i_gid; |
| unsigned short i_nlinks; |
| unsigned long i_zone[12]; |
| }; |
| |
| struct ext_free_inode { |
| unsigned long count; |
| unsigned long free[14]; |
| unsigned long next; |
| }; |
| |
| struct ext_free_block { |
| unsigned long count; |
| unsigned long free[254]; |
| unsigned long next; |
| }; |
| |
| struct ext_super_block { |
| unsigned long s_ninodes; |
| unsigned long s_nzones; |
| #ifdef EXTFS_BITMAP |
| unsigned long s_imap_blocks; |
| unsigned long s_zmap_blocks; |
| #endif |
| #ifdef EXTFS_FREELIST |
| unsigned long s_firstfreeblock; |
| unsigned long s_freeblockscount; |
| unsigned long s_firstfreeinode; |
| unsigned long s_freeinodescount; |
| #endif |
| unsigned long s_firstdatazone; |
| unsigned long s_log_zone_size; |
| unsigned long s_max_size; |
| unsigned long s_reserved1; |
| unsigned long s_reserved2; |
| unsigned long s_reserved3; |
| unsigned long s_reserved4; |
| unsigned long s_reserved5; |
| unsigned short s_magic; |
| }; |
| |
| struct ext_dir_entry { |
| unsigned long inode; |
| unsigned short rec_len; |
| unsigned short name_len; |
| char name[EXT_NAME_LEN]; |
| }; |
| |
| extern int ext_open(struct inode * inode, struct file * filp); |
| extern void ext_release(struct inode * inode, struct file * filp); |
| extern int ext_lookup(struct inode * dir,const char * name, int len, |
| struct inode ** result); |
| extern int ext_create(struct inode * dir,const char * name, int len, int mode, |
| struct inode ** result); |
| extern int ext_mkdir(struct inode * dir, const char * name, int len, int mode); |
| extern int ext_rmdir(struct inode * dir, const char * name, int len); |
| extern int ext_unlink(struct inode * dir, const char * name, int len); |
| extern int ext_symlink(struct inode * inode, const char * name, int len, |
| const char * symname); |
| extern int ext_link(struct inode * oldinode, struct inode * dir, const char * name, int len); |
| extern int ext_mknod(struct inode * dir, const char * name, int len, int mode, int rdev); |
| extern int ext_rename(struct inode * old_dir, const char * old_name, int old_len, |
| struct inode * new_dir, const char * new_name, int new_len); |
| extern struct inode * ext_new_inode(int dev); |
| extern void ext_free_inode(struct inode * inode); |
| extern unsigned long ext_count_free_inodes(struct super_block *sb); |
| extern int ext_new_block(int dev); |
| extern int ext_free_block(int dev, int block); |
| extern unsigned long ext_count_free_blocks(struct super_block *sb); |
| |
| extern int ext_create_block(struct inode *, int); |
| extern int ext_bmap(struct inode *,int); |
| |
| extern void ext_truncate(struct inode *); |
| extern void ext_put_super(struct super_block *); |
| extern void ext_write_super(struct super_block *); |
| extern struct super_block *ext_read_super(struct super_block *,void *); |
| extern void ext_read_inode(struct inode *); |
| extern void ext_write_inode(struct inode *); |
| extern void ext_put_inode(struct inode *); |
| extern void ext_statfs(struct super_block *, struct statfs *); |
| |
| extern int ext_lseek(struct inode *, struct file *, off_t, int); |
| extern int ext_read(struct inode *, struct file *, char *, int); |
| extern int ext_write(struct inode *, struct file *, char *, int); |
| |
| extern struct inode_operations ext_file_inode_operations; |
| extern struct inode_operations ext_dir_inode_operations; |
| extern struct inode_operations ext_symlink_inode_operations; |
| extern struct inode_operations ext_chrdev_inode_operations; |
| extern struct inode_operations ext_blkdev_inode_operations; |
| extern struct inode_operations ext_fifo_inode_operations; |
| |
| extern struct file_operations ext_file_operations; |
| extern struct file_operations ext_dir_operations; |
| |
| #endif |