4 * Copyright (c) 1999 Al Smith
6 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
9 #ifndef __EFS_FS_SB_H__
10 #define __EFS_FS_SB_H__
12 #include <linux/types.h>
13 #include <linux/magic.h>
15 /* EFS superblock magic numbers */
16 #define EFS_MAGIC 0x072959
17 #define EFS_NEWMAGIC 0x07295a
19 #define IS_EFS_MAGIC(x) ((x == EFS_MAGIC) || (x == EFS_NEWMAGIC))
22 #define EFS_ROOTINODE 2
24 /* efs superblock on disk */
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 */
48 /* efs superblock information in memory */
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 */
61 #endif /* __EFS_FS_SB_H__ */
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