fs_ext2.h

Hermit-at-1.1.3,一款bootloader

#ifndef _HERMIT_TARGET_FS_EXT2_H_
#define _HERMIT_TARGET_FS_EXT2_H_

#include <target/htypes.h>

typedef struct {
	u32	s_inodes_count;
	u32	s_blocks_count;
	u32	s_r_blocks_count;
	u32	s_free_blocks_count;
	u32	s_free_inodes_count;
	u32	s_first_data_block;
	u32	s_log_block_size;
	u32	s_log_frag_size;
	u32	s_blocks_per_group;
	u32	s_frags_per_group;
	u32	s_inodes_per_group;
	u32	s_mtime;
	u32	s_wtime;
	u16	s_mnt_count;
	u16	s_max_mnt_count;
	u16	s_magic;
	u16	s_state;
	u16	s_errors;
	u16	s_minor_rev_level;
	u32	s_lastcheck;
	u32	s_checkinterval;
	u32	s_creator_os;
	u32	s_rev_level;
	u16	s_def_resuid;
	u16	s_def_resgid;
	u32	s_first_ino;
	u16	s_inode_size;
	u16	s_block_group_nr;
	u32	s_feature_compat;
	u32	s_feature_incompat;
	u32	s_feature_ro_compat;
	u8	s_uuid[16];
	char	s_volume_name[16];
	char	s_last_mounted[64];
	u32	s_algorithm_usage_bitmap;
	u8	s_prealloc_blocks;
	u8	s_prealloc_dir_blocks;
	u16	s_padding1;
	u32	s_reserved[204];
} ext2_super_block_t;

typedef struct {
	u32	bg_block_bitmap;
	u32	bg_inode_bitmap;
	u32	bg_inode_table;
	u16	bg_free_blocks_count;
	u16	bg_free_inodes_count;
	u16	bg_used_dirs_count;
	u16	bg_pad;
	u32	bg_reserved[3];
} ext2_group_desc_t;

typedef struct {
	u16	i_mode;
	u16	i_uid;
	u32	i_size;
	u32	i_atime;
	u32	i_ctime;
	u32	i_mtime;
	u32	i_dtime;
	u16	i_gid;
	u16	i_links_count;
	u32	i_blocks;
	u32	i_flags;
	union {
		struct {
			u32	l_i_reserved1;
		} linux1;
		struct {
			u32	h_i_translator;
		} hurd1;
		struct {
			u32	m_i_reserved1;
		} masix1;
	} osd1;
	u32	i_block[15];
	u32	i_generation;
	u32	i_file_acl;
	u32	i_dir_acl;
	u32	i_faddr;
	union {
		struct {
			u8	l_i_frag;
			u8	l_i_fsize;
			u16	i_pad1;
			u16	l_i_uid_high;
			u16	l_i_gid_high;
			u32	l_i_reserved2;
		} linux2;
		struct {
			u8	h_i_frag;
			u8	h_i_fsize;
			u16	h_i_mode_high;
			u16	h_i_uid_high;
			u16	h_i_gid_high;
			u32	h_i_author;
		} hurd2;
		struct {
			u8	m_i_frag;
			u8	m_i_fsize;
			u16	m_pad1;
			u32	m_i_reserved2[2];
		} masix2;
	} osd2;
} ext2_inode_t;

typedef struct {
	u32	inode;
	u16	rec_len;
	u16	name_len;
	char	name[255];
} ext2_dir_entry_t;



extern int ext2_find_image(ide_info_t *info, file_t *file ,
			   ext2_super_block_t *sb);

#endif