File: /usr/include/linux/efs_vh.h

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