sortix--sortix/ext/ext-structs.h

/*
 * Copyright (c) 2013 Jonas 'Sortie' Termansen.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * ext-structs.h
 * Data structures for the extended filesystem.
 */

#ifndef EXT_STRUCTS_H
#define EXT_STRUCTS_H

struct ext_superblock
{
	uint32_t s_inodes_count;
	uint32_t s_blocks_count;
	uint32_t s_r_blocks_count;
	uint32_t s_free_blocks_count;
	uint32_t s_free_inodes_count;
	uint32_t s_first_data_block;
	uint32_t s_log_block_size;
	 int32_t s_log_frag_size;
	uint32_t s_blocks_per_group;
	uint32_t s_frags_per_group;
	uint32_t s_inodes_per_group;
	uint32_t s_mtime;
	uint32_t s_wtime;
	uint16_t s_mnt_count;
	uint16_t s_max_mnt_count;
	uint16_t s_magic;
	uint16_t s_state;
	uint16_t s_errors;
	uint16_t s_minor_rev_level;
	uint32_t s_lastcheck;
	uint32_t s_checkinterval;
	uint32_t s_creator_os;
	uint32_t s_rev_level;
	uint16_t s_def_resuid;
	uint16_t s_def_resgid;
// EXT2_DYNAMIC_REV
	uint32_t s_first_ino;
	uint16_t s_inode_size;
	uint16_t s_block_group_nr;
	uint32_t s_feature_compat;
	uint32_t s_feature_incompat;
	uint32_t s_feature_ro_compat;
	uint8_t  s_uuid[16];
	/*uint8_t*/ char s_volume_name[16];
	/*uint8_t*/ char s_last_mounted[64];
	uint32_t s_algo_bitmap;
// Performance Hints
	uint8_t  s_prealloc_blocks;
	uint8_t  s_prealloc_dir_blocks;
	uint16_t alignment0;
// Journaling Support
	uint8_t  s_journal_uuid[16];
	uint32_t s_journal_inum;
	uint32_t s_journal_dev;
	uint32_t s_last_orphan;
// Directory Indexing Support
	uint32_t s_hash_seed[4];
	uint8_t  s_def_hash_version;
	uint8_t  alignment1[3];
// Other options
	uint32_t s_default_mount_options;
	uint32_t s_first_meta_bg;
	uint8_t  alignment2[760];
};

struct ext_blockgrpdesc
{
	uint32_t bg_block_bitmap;
	uint32_t bg_inode_bitmap;
	uint32_t bg_inode_table;
	uint16_t bg_free_blocks_count;
	uint16_t bg_free_inodes_count;
	uint16_t bg_used_dirs_count;
	uint16_t alignment0;
	uint8_t  alignment1[12];
};

struct ext_inode
{
	uint16_t i_mode;
	uint16_t i_uid;
	uint32_t i_size;
	uint32_t i_atime;
	uint32_t i_ctime;
	uint32_t i_mtime;
	uint32_t i_dtime;
	uint16_t i_gid;
	uint16_t i_links_count;
	uint32_t i_blocks;
	uint32_t i_flags;
	uint32_t i_osd1;
	uint32_t i_block[15];
	uint32_t i_generation;
	uint32_t i_file_acl;
	uint32_t i_dir_acl;
	uint32_t i_faddr;
	uint8_t i_frag;
	uint8_t i_fsize;
	uint16_t i_mode_high;
	uint16_t i_uid_high;
	uint16_t i_gid_high;
	uint32_t i_osd2_alignment0;
};

struct ext_dirent
{
	uint32_t inode;
	uint16_t reclen;
	uint8_t name_len;
	uint8_t file_type;
	char name[0];
};

#endif