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/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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__ */