1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * efs_vh.h |
4 | * |
5 | * Copyright (c) 1999 Al Smith |
6 | * |
7 | * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc. |
8 | */ |
9 | |
10 | #ifndef __EFS_VH_H__ |
11 | #define __EFS_VH_H__ |
12 | |
13 | #define VHMAGIC 0xbe5a941 /* volume header magic number */ |
14 | #define NPARTAB 16 /* 16 unix partitions */ |
15 | #define NVDIR 15 /* max of 15 directory entries */ |
16 | #define BFNAMESIZE 16 /* max 16 chars in boot file name */ |
17 | #define VDNAMESIZE 8 |
18 | |
19 | struct volume_directory { |
20 | char vd_name[VDNAMESIZE]; /* name */ |
21 | __be32 vd_lbn; /* logical block number */ |
22 | __be32 vd_nbytes; /* file length in bytes */ |
23 | }; |
24 | |
25 | struct partition_table { /* one per logical partition */ |
26 | __be32 pt_nblks; /* # of logical blks in partition */ |
27 | __be32 pt_firstlbn; /* first lbn of partition */ |
28 | __be32 pt_type; /* use of partition */ |
29 | }; |
30 | |
31 | struct { |
32 | __be32 ; /* identifies volume header */ |
33 | __be16 ; /* root partition number */ |
34 | __be16 ; /* swap partition number */ |
35 | char [BFNAMESIZE]; /* name of file to boot */ |
36 | char [48]; /* device param space */ |
37 | struct volume_directory [NVDIR]; /* other vol hdr contents */ |
38 | struct partition_table [NPARTAB]; /* device partition layout */ |
39 | __be32 ; /* volume header checksum */ |
40 | __be32 ; /* fill out to 512 bytes */ |
41 | }; |
42 | |
43 | /* partition type sysv is used for EFS format CD-ROM partitions */ |
44 | #define SGI_SYSV 0x05 |
45 | #define SGI_EFS 0x07 |
46 | #define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV)) |
47 | |
48 | struct pt_types { |
49 | int pt_type; |
50 | char *pt_name; |
51 | }; |
52 | |
53 | #endif /* __EFS_VH_H__ */ |
54 | |
55 | |