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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [redboot/] [v2_0/] [include/] [fs/] [e2fs.h] - Rev 307
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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 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-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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