mirror_zfs/include/sys/efi_partition.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef	_SYS_EFI_PARTITION_H
#define	_SYS_EFI_PARTITION_H

#include <sys/uuid.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * GUID Partition Table Header
 */

#define	EFI_LABEL_SIZE	512
#define	LEN_EFI_PAD	(EFI_LABEL_SIZE - \
			    ((5 * sizeof (diskaddr_t)) + \
			    (7 * sizeof (uint_t)) + \
			    (8 * sizeof (char)) + \
			    (1 * (sizeof (struct uuid)))))

#define	EFI_SIGNATURE	0x5452415020494645ULL

/* EFI Guid Partition Table Header -- little endian on-disk format */
typedef struct efi_gpt {
	uint64_t	efi_gpt_Signature;
	uint_t		efi_gpt_Revision;
	uint_t		efi_gpt_HeaderSize;
	uint_t		efi_gpt_HeaderCRC32;
	uint_t		efi_gpt_Reserved1;
	diskaddr_t	efi_gpt_MyLBA;
	diskaddr_t	efi_gpt_AlternateLBA;
	diskaddr_t	efi_gpt_FirstUsableLBA;
	diskaddr_t	efi_gpt_LastUsableLBA;
	struct uuid	efi_gpt_DiskGUID;
	diskaddr_t	efi_gpt_PartitionEntryLBA;
	uint_t		efi_gpt_NumberOfPartitionEntries;
	uint_t		efi_gpt_SizeOfPartitionEntry;
	uint_t		efi_gpt_PartitionEntryArrayCRC32;
	char		efi_gpt_Reserved2[LEN_EFI_PAD];
} efi_gpt_t;

/* EFI Guid Partition Entry Attributes -- little endian format */
typedef struct efi_gpe_Attrs {
	uint32_t	PartitionAttrs		:16,
			Reserved2		:16;
	uint32_t	Reserved1		:31,
			RequiredPartition	:1;
} efi_gpe_Attrs_t;

/*
 * 6a96237f-1dd2-11b2-99a6-080020736631	V_UNASSIGNED (not used as such)
 * 6a82cb45-1dd2-11b2-99a6-080020736631	V_BOOT
 * 6a85cf4d-1dd2-11b2-99a6-080020736631	V_ROOT
 * 6a87c46f-1dd2-11b2-99a6-080020736631	V_SWAP
 * 6a898cc3-1dd2-11b2-99a6-080020736631	V_USR
 * 6a8b642b-1dd2-11b2-99a6-080020736631	V_BACKUP
 * 6a8d2ac7-1dd2-11b2-99a6-080020736631	V_STAND (not used)
 * 6a8ef2e9-1dd2-11b2-99a6-080020736631	V_VAR
 * 6a90ba39-1dd2-11b2-99a6-080020736631	V_HOME
 * 6a9283a5-1dd2-11b2-99a6-080020736631	V_ALTSCTR
 * 6a945a3b-1dd2-11b2-99a6-080020736631	V_CACHE
 */

#define	EFI_UNUSED	{ 0x00000000, 0x0000, 0x0000, 0x00, 0x00, \
			    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } }
#define	EFI_RESV1	{ 0x6a96237f, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_BOOT	{ 0x6a82cb45, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_ROOT	{ 0x6a85cf4d, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_SWAP	{ 0x6a87c46f, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_USR		{ 0x6a898cc3, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_BACKUP	{ 0x6a8b642b, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_RESV2	{ 0x6a8d2ac7, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_VAR		{ 0x6a8ef2e9, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_HOME	{ 0x6a90ba39, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_ALTSCTR	{ 0x6a9283a5, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_RESERVED	{ 0x6a945a3b, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_SYSTEM	{ 0xC12A7328, 0xF81F, 0x11d2, 0xBA, 0x4B, \
			    { 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B } }
#define	EFI_LEGACY_MBR	{ 0x024DEE41, 0x33E7, 0x11d3, 0x9D, 0x69, \
			    { 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F } }
#define	EFI_SYMC_PUB	{ 0x6a9630d1, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_SYMC_CDS	{ 0x6a980767, 0x1dd2, 0x11b2, 0x99, 0xa6, \
			    { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } }
#define	EFI_MSFT_RESV	{ 0xE3C9E316, 0x0B5C, 0x4DB8, 0x81, 0x7D, \
			    { 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE } }
#define	EFI_DELL_BASIC	{ 0xebd0a0a2, 0xb9e5, 0x4433, 0x87, 0xc0, \
			    { 0x68, 0xb6, 0xb7, 0x26, 0x99, 0xc7 } }
#define	EFI_DELL_RAID	{ 0xa19d880f, 0x05fc, 0x4d3b, 0xa0, 0x06, \
			    { 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e } }
#define	EFI_DELL_SWAP	{ 0x0657fd6d, 0xa4ab, 0x43c4, 0x84, 0xe5, \
			    { 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f } }
#define	EFI_DELL_LVM	{ 0xe6d6d379, 0xf507, 0x44c2, 0xa2, 0x3c, \
			    { 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28 } }
#define	EFI_DELL_RESV	{ 0x8da63339, 0x0007, 0x60c0, 0xc4, 0x36, \
			    { 0x08, 0x3a, 0xc8, 0x23, 0x09, 0x08 } }
#define	EFI_AAPL_HFS	{ 0x48465300, 0x0000, 0x11aa, 0xaa, 0x11, \
			    { 0x00, 0x30, 0x65, 0x43, 0xec, 0xac } }
#define	EFI_AAPL_UFS	{ 0x55465300, 0x0000, 0x11aa, 0xaa, 0x11, \
			    { 0x00, 0x30, 0x65, 0x43, 0xec, 0xac } }

/* minimum # of bytes for partition table entires, per EFI spec */
#define	EFI_MIN_ARRAY_SIZE	(16 * 1024)

#define	EFI_PART_NAME_LEN	36

/* size of the "reserved" partition, in blocks */
#define	EFI_MIN_RESV_SIZE	(16 * 1024)

/* EFI Guid Partition Entry */
typedef struct efi_gpe {
	struct uuid	efi_gpe_PartitionTypeGUID;
	struct uuid	efi_gpe_UniquePartitionGUID;
	diskaddr_t	efi_gpe_StartingLBA;
	diskaddr_t	efi_gpe_EndingLBA;
	efi_gpe_Attrs_t	efi_gpe_Attributes;
	ushort_t	efi_gpe_PartitionName[EFI_PART_NAME_LEN];
} efi_gpe_t;

/*
 * passed to the useful (we hope) routines (efi_alloc_and_read and
 * efi_write) that take this VTOC-like struct.  These routines handle
 * converting this struct into the EFI struct, generate UUIDs and
 * checksums, and perform any necessary byte-swapping to the on-disk
 * format.
 */
/* Solaris library abstraction for EFI partitons */
typedef struct dk_part	{
	diskaddr_t	p_start;	/* starting LBA */
	diskaddr_t	p_size;		/* size in blocks */
	struct uuid	p_guid;		/* partion type GUID */
	ushort_t	p_tag;		/* converted to part'n type GUID */
	ushort_t	p_flag;		/* attributes */
	char		p_name[EFI_PART_NAME_LEN]; /* partition name */
	struct uuid	p_uguid;	/* unique partition GUID */
	uint_t		p_resv[8];	/* future use - set to zero */
} dk_part_t;

/* Solaris library abstraction for an EFI GPT */
#define	EFI_VERSION102		0x00010002
#define	EFI_VERSION100		0x00010000
#define	EFI_VERSION_CURRENT	EFI_VERSION100
typedef struct dk_gpt {
	uint_t		efi_version;	/* set to EFI_VERSION_CURRENT */
	uint_t		efi_nparts;	/* number of partitions below */
	uint_t		efi_part_size;	/* size of each partition entry */
					/* efi_part_size is unused */
	uint_t		efi_lbasize;	/* size of block in bytes */
	diskaddr_t	efi_last_lba;	/* last block on the disk */
	diskaddr_t	efi_first_u_lba; /* first block after labels */
	diskaddr_t	efi_last_u_lba;	/* last block before backup labels */
	struct uuid	efi_disk_uguid;	/* unique disk GUID */
	uint_t		efi_flags;
	uint_t		efi_reserved1;	/* future use - set to zero */
	diskaddr_t	efi_altern_lba;	/* lba of alternate GPT header */
	uint_t		efi_reserved[12]; /* future use - set to zero */
	struct dk_part	efi_parts[1];	/* array of partitions */
} dk_gpt_t;

/* possible values for "efi_flags" */
#define	EFI_GPT_PRIMARY_CORRUPT	0x1	/* primary label corrupt */

/* the private ioctl between libefi and the driver */
typedef struct dk_efi {
	diskaddr_t	 dki_lba;	/* starting block */
	len_t		 dki_length;	/* length in bytes */
	union {
		efi_gpt_t 	*_dki_data;
		uint64_t	_dki_data_64;
	} dki_un;
#define	dki_data	dki_un._dki_data
#define	dki_data_64	dki_un._dki_data_64
} dk_efi_t;

struct partition64 {
	struct uuid	p_type;
	uint_t		p_partno;
	uint_t		p_resv1;
	diskaddr_t	p_start;
	diskaddr_t	p_size;
};

/*
 * Number of EFI partitions
 */
#if defined(__linux__)
#define	EFI_NUMPAR	128 /* Expected by parted-1.8.1 */
#else
#define	EFI_NUMPAR	9
#endif

#ifndef _KERNEL
extern	int	efi_alloc_and_init(int, uint32_t, struct dk_gpt **);
extern	int	efi_alloc_and_read(int, struct dk_gpt **);
extern	int	efi_write(int, struct dk_gpt *);
extern	void	efi_free(struct dk_gpt *);
extern	int	efi_type(int);
extern	void	efi_err_check(struct dk_gpt *);
extern	int	efi_auto_sense(int fd, struct dk_gpt **);
extern	int	efi_use_whole_disk(int fd);
#endif

#ifdef __cplusplus
}
#endif

#endif /* _SYS_EFI_PARTITION_H */