| 1 |
13 |
serginhofr |
/*
|
| 2 |
|
|
* efs_fs_sb.h
|
| 3 |
|
|
*
|
| 4 |
|
|
* Copyright (c) 1999 Al Smith
|
| 5 |
|
|
*
|
| 6 |
|
|
* Portions derived from IRIX header files (c) 1988 Silicon Graphics
|
| 7 |
|
|
*/
|
| 8 |
|
|
|
| 9 |
|
|
#ifndef __EFS_FS_SB_H__
|
| 10 |
|
|
#define __EFS_FS_SB_H__
|
| 11 |
|
|
|
| 12 |
|
|
#include <linux/types.h>
|
| 13 |
|
|
#include <linux/magic.h>
|
| 14 |
|
|
|
| 15 |
|
|
/* EFS superblock magic numbers */
|
| 16 |
|
|
#define EFS_MAGIC 0x072959
|
| 17 |
|
|
#define EFS_NEWMAGIC 0x07295a
|
| 18 |
|
|
|
| 19 |
|
|
#define IS_EFS_MAGIC(x) ((x == EFS_MAGIC) || (x == EFS_NEWMAGIC))
|
| 20 |
|
|
|
| 21 |
|
|
#define EFS_SUPER 1
|
| 22 |
|
|
#define EFS_ROOTINODE 2
|
| 23 |
|
|
|
| 24 |
|
|
/* efs superblock on disk */
|
| 25 |
|
|
struct efs_super {
|
| 26 |
|
|
__be32 fs_size; /* size of filesystem, in sectors */
|
| 27 |
|
|
__be32 fs_firstcg; /* bb offset to first cg */
|
| 28 |
|
|
__be32 fs_cgfsize; /* size of cylinder group in bb's */
|
| 29 |
|
|
__be16 fs_cgisize; /* bb's of inodes per cylinder group */
|
| 30 |
|
|
__be16 fs_sectors; /* sectors per track */
|
| 31 |
|
|
__be16 fs_heads; /* heads per cylinder */
|
| 32 |
|
|
__be16 fs_ncg; /* # of cylinder groups in filesystem */
|
| 33 |
|
|
__be16 fs_dirty; /* fs needs to be fsck'd */
|
| 34 |
|
|
__be32 fs_time; /* last super-block update */
|
| 35 |
|
|
__be32 fs_magic; /* magic number */
|
| 36 |
|
|
char fs_fname[6]; /* file system name */
|
| 37 |
|
|
char fs_fpack[6]; /* file system pack name */
|
| 38 |
|
|
__be32 fs_bmsize; /* size of bitmap in bytes */
|
| 39 |
|
|
__be32 fs_tfree; /* total free data blocks */
|
| 40 |
|
|
__be32 fs_tinode; /* total free inodes */
|
| 41 |
|
|
__be32 fs_bmblock; /* bitmap location. */
|
| 42 |
|
|
__be32 fs_replsb; /* Location of replicated superblock. */
|
| 43 |
|
|
__be32 fs_lastialloc; /* last allocated inode */
|
| 44 |
|
|
char fs_spare[20]; /* space for expansion - MUST BE ZERO */
|
| 45 |
|
|
__be32 fs_checksum; /* checksum of volume portion of fs */
|
| 46 |
|
|
};
|
| 47 |
|
|
|
| 48 |
|
|
/* efs superblock information in memory */
|
| 49 |
|
|
struct efs_sb_info {
|
| 50 |
|
|
__u32 fs_magic; /* superblock magic number */
|
| 51 |
|
|
__u32 fs_start; /* first block of filesystem */
|
| 52 |
|
|
__u32 first_block; /* first data block in filesystem */
|
| 53 |
|
|
__u32 total_blocks; /* total number of blocks in filesystem */
|
| 54 |
|
|
__u32 group_size; /* # of blocks a group consists of */
|
| 55 |
|
|
__u32 data_free; /* # of free data blocks */
|
| 56 |
|
|
__u32 inode_free; /* # of free inodes */
|
| 57 |
|
|
__u16 inode_blocks; /* # of blocks used for inodes in every grp */
|
| 58 |
|
|
__u16 total_groups; /* # of groups */
|
| 59 |
|
|
};
|
| 60 |
|
|
|
| 61 |
|
|
#endif /* __EFS_FS_SB_H__ */
|
| 62 |
|
|
|
