1 /*
2 * efs_vh.h
3 *
4 * Copyright (c) 1999 Al Smith
5 *
6 * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
7 */
8
9 #ifndef __EFS_VH_H__
10 #define __EFS_VH_H__
11
12 #define VHMAGIC 0xbe5a941 /* volume header magic number */
13 #define NPARTAB 16 /* 16 unix partitions */
14 #define NVDIR 15 /* max of 15 directory entries */
15 #define BFNAMESIZE 16 /* max 16 chars in boot file name */
16 #define VDNAMESIZE 8
17
18 struct volume_directory {
19 char vd_name[VDNAMESIZE]; /* name */
20 int vd_lbn; /* logical block number */
21 int vd_nbytes; /* file length in bytes */
22 };
23
24 struct partition_table { /* one per logical partition */
25 int pt_nblks; /* # of logical blks in partition */
26 int pt_firstlbn; /* first lbn of partition */
27 int pt_type; /* use of partition */
28 };
29
30 struct volume_header {
31 int vh_magic; /* identifies volume header */
32 short vh_rootpt; /* root partition number */
33 short vh_swappt; /* swap partition number */
34 char vh_bootfile[BFNAMESIZE]; /* name of file to boot */
35 char pad[48]; /* device param space */
36 struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
37 struct partition_table vh_pt[NPARTAB]; /* device partition layout */
38 int vh_csum; /* volume header checksum */
39 int vh_fill; /* fill out to 512 bytes */
40 };
41
42 /* partition type sysv is used for EFS format CD-ROM partitions */
43 #define SGI_SYSV 0x05
44 #define SGI_EFS 0x07
45 #define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV))
46
47 struct pt_types {
48 int pt_type;
49 char *pt_name;
50 } sgi_pt_types[] = {
51 {0x00, "SGI vh"},
52 {0x01, "SGI trkrepl"},
53 {0x02, "SGI secrepl"},
54 {0x03, "SGI raw"},
55 {0x04, "SGI bsd"},
56 {SGI_SYSV, "SGI sysv"},
57 {0x06, "SGI vol"},
58 {SGI_EFS, "SGI efs"},
59 {0x08, "SGI lv"},
60 {0x09, "SGI rlv"},
61 {0x0A, "SGI xfs"},
62 {0x0B, "SGI xfslog"},
63 {0x0C, "SGI xlv"},
64 {0x82, "Linux swap"},
65 {0x83, "Linux native"},
66 {0, NULL}
67 };
68
69 #endif /* __EFS_VH_H__ */
70
71
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