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 /* statfs() magic number for EFS */
13 #define EFS_SUPER_MAGIC 0x414A53
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 int32_t fs_size
; /* size of filesystem, in sectors */
27 int32_t fs_firstcg
; /* bb offset to first cg */
28 int32_t fs_cgfsize
; /* size of cylinder group in bb's */
29 short fs_cgisize
; /* bb's of inodes per cylinder group */
30 short fs_sectors
; /* sectors per track */
31 short fs_heads
; /* heads per cylinder */
32 short fs_ncg
; /* # of cylinder groups in filesystem */
33 short fs_dirty
; /* fs needs to be fsck'd */
34 int32_t fs_time
; /* last super-block update */
35 int32_t fs_magic
; /* magic number */
36 char fs_fname
[6]; /* file system name */
37 char fs_fpack
[6]; /* file system pack name */
38 int32_t fs_bmsize
; /* size of bitmap in bytes */
39 int32_t fs_tfree
; /* total free data blocks */
40 int32_t fs_tinode
; /* total free inodes */
41 int32_t fs_bmblock
; /* bitmap location. */
42 int32_t fs_replsb
; /* Location of replicated superblock. */
43 int32_t fs_lastialloc
; /* last allocated inode */
44 char fs_spare
[20]; /* space for expansion - MUST BE ZERO */
45 int32_t fs_checksum
; /* checksum of volume portion of fs */
48 /* efs superblock information in memory */
50 int32_t fs_magic
; /* superblock magic number */
51 int32_t fs_start
; /* first block of filesystem */
52 int32_t first_block
; /* first data block in filesystem */
53 int32_t total_blocks
; /* total number of blocks in filesystem */
54 int32_t group_size
; /* # of blocks a group consists of */
55 int32_t data_free
; /* # of free data blocks */
56 int32_t inode_free
; /* # of free inodes */
57 short inode_blocks
; /* # of blocks used for inodes in every grp */
58 short total_groups
; /* # of groups */
61 #endif /* __EFS_FS_SB_H__ */