55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* efs_vh.h
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*
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* Copyright (c) 1999 Al Smith
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*
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* Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
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*/
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#ifndef __EFS_VH_H__
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#define __EFS_VH_H__
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#define VHMAGIC 0xbe5a941 /* volume header magic number */
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#define NPARTAB 16 /* 16 unix partitions */
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#define NVDIR 15 /* max of 15 directory entries */
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#define BFNAMESIZE 16 /* max 16 chars in boot file name */
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#define VDNAMESIZE 8
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struct volume_directory {
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char vd_name[VDNAMESIZE]; /* name */
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__be32 vd_lbn; /* logical block number */
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__be32 vd_nbytes; /* file length in bytes */
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};
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struct partition_table { /* one per logical partition */
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__be32 pt_nblks; /* # of logical blks in partition */
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__be32 pt_firstlbn; /* first lbn of partition */
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__be32 pt_type; /* use of partition */
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};
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struct volume_header {
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__be32 vh_magic; /* identifies volume header */
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__be16 vh_rootpt; /* root partition number */
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__be16 vh_swappt; /* swap partition number */
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char vh_bootfile[BFNAMESIZE]; /* name of file to boot */
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char pad[48]; /* device param space */
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struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
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struct partition_table vh_pt[NPARTAB]; /* device partition layout */
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__be32 vh_csum; /* volume header checksum */
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__be32 vh_fill; /* fill out to 512 bytes */
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};
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/* partition type sysv is used for EFS format CD-ROM partitions */
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#define SGI_SYSV 0x05
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#define SGI_EFS 0x07
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#define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV))
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struct pt_types {
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int pt_type;
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char *pt_name;
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};
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#endif /* __EFS_VH_H__ */
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