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//==========================================================================
//
// e2fs.h
//
// Second extended filesystem defines.
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): msalter
// Contributors: msalter
// Date: 2001-06-25
// Purpose:
// Description:
//
// This code is part of RedBoot (tm).
//
//####DESCRIPTIONEND####
//
//==========================================================================
#ifndef CYGONCE_REDBOOT_E2FS_H
#define CYGONCE_REDBOOT_E2FS_H
//
// Structure of the super block
//
struct e2fs_super_block {
cyg_uint32 inodes_count;
cyg_uint32 blocks_count;
cyg_uint32 r_blocks_count;
cyg_uint32 free_blocks_count;
cyg_uint32 free_inodes_count;
cyg_uint32 first_data_block;
cyg_uint32 log_block_size;
cyg_int32 log_frag_size;
cyg_uint32 blocks_per_group;
cyg_uint32 frags_per_group;
cyg_uint32 inodes_per_group;
cyg_uint32 mtime;
cyg_uint32 wtime;
cyg_uint16 mnt_count;
cyg_int16 max_mnt_count;
cyg_uint16 magic;
cyg_uint16 state;
cyg_uint16 errors;
cyg_uint16 minor_rev_level;
cyg_uint32 lastcheck;
cyg_uint32 checkinterval;
cyg_uint32 creator_os;
cyg_uint32 rev_level;
cyg_uint16 def_resuid;
cyg_uint16 def_resgid;
};
#define E2FS_PRE_02B_MAGIC 0xEF51
#define E2FS_SUPER_MAGIC 0xEF53
#define E2FS_PTRS_PER_BLOCK(e) ((e)->blocksize / sizeof(cyg_uint32))
#define E2FS_BLOCK_SIZE(s) (E2FS_MIN_BLOCK_SIZE << SWAB_LE32((s)->log_block_size))
#define E2FS_ADDR_PER_BLOCK(s) (E2FS_BLOCK_SIZE(s) / sizeof(unsigned int))
#define E2FS_BLOCK_SIZE_BITS(s) (SWAB_LE32((s)->log_block_size) + 10)
#define E2FS_NR_DIR_BLOCKS 12
#define E2FS_IND_BLOCK E2FS_NR_DIR_BLOCKS
#define E2FS_DIND_BLOCK (E2FS_IND_BLOCK + 1)
#define E2FS_TIND_BLOCK (E2FS_DIND_BLOCK + 1)
#define E2FS_N_BLOCKS (E2FS_TIND_BLOCK + 1)
// Structure of an inode on the disk
//
typedef struct e2fs_inode {
cyg_uint16 mode;
cyg_uint16 uid;
cyg_uint32 size;
cyg_uint32 atime;
cyg_uint32 ctime;
cyg_uint32 mtime;
cyg_uint32 dtime;
cyg_uint16 gid;
cyg_uint16 links_count;
cyg_uint32 blocks;
cyg_uint32 flags;
cyg_uint32 reserved1;
cyg_uint32 block[E2FS_N_BLOCKS];
cyg_uint32 version;
cyg_uint32 file_acl;
cyg_uint32 dir_acl;
cyg_uint32 faddr;
cyg_uint8 frag;
cyg_uint8 fsize;
cyg_uint16 pad1;
cyg_uint32 reserved2[2];
} e2fs_inode_t;
#define E2FS_INODES_PER_BLOCK(e) ((e)->blocksize / sizeof (struct e2fs_inode))
#define E2FS_MIN_BLOCK_SIZE 1024
#define E2FS_MAX_BLOCK_SIZE 4096
// Special inode numbers
//
#define E2FS_BAD_INO 1
#define E2FS_ROOT_INO 2
typedef struct e2fs_dir_entry {
cyg_uint32 inode;
cyg_uint16 reclen;
cyg_uint8 namelen;
cyg_uint8 filetype;
char name[2];
} e2fs_dir_entry_t;
#define E2FS_FTYPE_UNKNOWN 0
#define E2FS_FTYPE_REG_FILE 1
#define E2FS_FTYPE_DIR 2
#define E2FS_FTYPE_CHRDEV 3
#define E2FS_FTYPE_BLKDEV 4
#define E2FS_FTYPE_FIFO 5
#define E2FS_FTYPE_SOCK 6
#define E2FS_FTYPE_SYMLINK 7
typedef struct e2fs_group
{
cyg_uint32 block_bitmap; // blocks bitmap block
cyg_uint32 inode_bitmap; // inodes bitmap block
cyg_uint32 inode_table; // inodes table block
cyg_uint16 free_blocks_count;
cyg_uint16 free_inodes_count;
cyg_uint16 used_dirs_count;
cyg_uint16 pad;
cyg_uint32 reserved[3];
} e2fs_group_t;
#define E2FS_BLOCKS_PER_GROUP(s) (SWAB_LE32((s)->blocks_per_group))
#define E2FS_INODES_PER_GROUP(s) (SWAB_LE32((s)->inodes_per_group))
#define E2FS_GDESC_PER_BLOCK(e) ((e)->blocksize / sizeof (struct e2fs_e2fs_group_desc))
#define E2FS_GDESC_PER_SECTOR (SECTOR_SIZE/sizeof(e2fs_group_t))
#define E2FS_GDESC_CACHE_SIZE (E2FS_GDESC_PER_SECTOR * 1)
#define E2FS_GDESC_PER_SECTOR (SECTOR_SIZE/sizeof(e2fs_group_t))
typedef struct e2fs_desc {
partition_t *part; // partition holding this filesystem
cyg_uint32 blocksize; // fs blocksize
cyg_uint32 ngroups; // number of groups in fs
cyg_uint32 blocks_per_group;
cyg_uint32 inodes_per_group;
cyg_uint32 gdesc_block; // block nr of group descriptors
cyg_int32 gdesc_first; // which gdesc is first in cache
e2fs_group_t gdesc_cache[E2FS_GDESC_CACHE_SIZE];
cyg_uint32 nr_ind_blocks;
cyg_uint32 nr_dind_blocks;
cyg_uint32 nr_tind_blocks;
} e2fs_desc_t;
#define E2FS_BLOCK_TO_SECTOR(e,b) ((b) * ((e)->blocksize / SECTOR_SIZE))
extern fs_funs_t redboot_e2fs_funs;
#endif // CYGONCE_REDBOOT_E2FS_H
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