54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
|
|
* efs_vh.h
|
|
*
|
|
* Copyright (c) 1999 Al Smith
|
|
*
|
|
* Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
|
|
*/
|
|
|
|
#ifndef __EFS_VH_H__
|
|
#define __EFS_VH_H__
|
|
|
|
#define VHMAGIC 0xbe5a941 /* volume header magic number */
|
|
#define NPARTAB 16 /* 16 unix partitions */
|
|
#define NVDIR 15 /* max of 15 directory entries */
|
|
#define BFNAMESIZE 16 /* max 16 chars in boot file name */
|
|
#define VDNAMESIZE 8
|
|
|
|
struct volume_directory {
|
|
char vd_name[VDNAMESIZE]; /* name */
|
|
__be32 vd_lbn; /* logical block number */
|
|
__be32 vd_nbytes; /* file length in bytes */
|
|
};
|
|
|
|
struct partition_table { /* one per logical partition */
|
|
__be32 pt_nblks; /* # of logical blks in partition */
|
|
__be32 pt_firstlbn; /* first lbn of partition */
|
|
__be32 pt_type; /* use of partition */
|
|
};
|
|
|
|
struct volume_header {
|
|
__be32 vh_magic; /* identifies volume header */
|
|
__be16 vh_rootpt; /* root partition number */
|
|
__be16 vh_swappt; /* swap partition number */
|
|
char vh_bootfile[BFNAMESIZE]; /* name of file to boot */
|
|
char pad[48]; /* device param space */
|
|
struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
|
|
struct partition_table vh_pt[NPARTAB]; /* device partition layout */
|
|
__be32 vh_csum; /* volume header checksum */
|
|
__be32 vh_fill; /* fill out to 512 bytes */
|
|
};
|
|
|
|
/* partition type sysv is used for EFS format CD-ROM partitions */
|
|
#define SGI_SYSV 0x05
|
|
#define SGI_EFS 0x07
|
|
#define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV))
|
|
|
|
struct pt_types {
|
|
int pt_type;
|
|
char *pt_name;
|
|
};
|
|
|
|
#endif /* __EFS_VH_H__ */
|
|
|