[mirror_ubuntu-bionic-kernel.git] / include / linux / efs_vh.h

/* 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__ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* efs_vh.h
	4	*
	5	* Copyright (c) 1999 Al Smith
	6	*
	7	* Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
	8	*/
	9
	10	#ifndef __EFS_VH_H__
	11	#define __EFS_VH_H__
	12
	13	#define VHMAGIC 0xbe5a941 /* volume header magic number */
	14	#define NPARTAB 16 /* 16 unix partitions */
	15	#define NVDIR 15 /* max of 15 directory entries */
	16	#define BFNAMESIZE 16 /* max 16 chars in boot file name */
	17	#define VDNAMESIZE 8
	18
	19	struct volume_directory {
	20	char vd_name[VDNAMESIZE]; /* name */
	21	__be32 vd_lbn; /* logical block number */
	22	__be32 vd_nbytes; /* file length in bytes */
	23	};
	24
	25	struct partition_table { /* one per logical partition */
	26	__be32 pt_nblks; /* # of logical blks in partition */
	27	__be32 pt_firstlbn; /* first lbn of partition */
	28	__be32 pt_type; /* use of partition */
	29	};
	30
	31	struct volume_header {
	32	__be32 vh_magic; /* identifies volume header */
	33	__be16 vh_rootpt; /* root partition number */
	34	__be16 vh_swappt; /* swap partition number */
	35	char vh_bootfile[BFNAMESIZE]; /* name of file to boot */
	36	char pad[48]; /* device param space */
	37	struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
	38	struct partition_table vh_pt[NPARTAB]; /* device partition layout */
	39	__be32 vh_csum; /* volume header checksum */
	40	__be32 vh_fill; /* fill out to 512 bytes */
	41	};
	42
	43	/* partition type sysv is used for EFS format CD-ROM partitions */
	44	#define SGI_SYSV 0x05
	45	#define SGI_EFS 0x07
	46	#define IS_EFS(x) (((x) == SGI_EFS) \|\| ((x) == SGI_SYSV))
	47
	48	struct pt_types {
	49	int pt_type;
	50	char *pt_name;
	51	};
	52
	53	#endif /* __EFS_VH_H__ */
	54