244 lines
7.1 KiB
C
244 lines
7.1 KiB
C
/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 1999,2000,2001 Free Software Foundation, Inc.
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* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
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*
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* PUPA is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PUPA; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef PUPA_PARTITION_HEADER
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#define PUPA_PARTITION_HEADER 1
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#include <pupa/symbol.h>
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#include <pupa/types.h>
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#include <pupa/err.h>
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/* The signature. */
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#define PUPA_PARTITION_SIGNATURE 0xaa55
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/* This is not a flag actually, but used as if it were a flag. */
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#define PUPA_PARTITION_TYPE_HIDDEN_FLAG 0x10
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/* DOS partition types. */
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#define PUPA_PARTITION_TYPE_NONE 0
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#define PUPA_PARTITION_TYPE_FAT12 1
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#define PUPA_PARTITION_TYPE_FAT16_LT32M 4
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#define PUPA_PARTITION_TYPE_EXTENDED 5
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#define PUPA_PARTITION_TYPE_FAT16_GT32M 6
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#define PUPA_PARTITION_TYPE_FAT32 0xb
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#define PUPA_PARTITION_TYPE_FAT32_LBA 0xc
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#define PUPA_PARTITION_TYPE_FAT16_LBA 0xe
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#define PUPA_PARTITION_TYPE_WIN95_EXTENDED 0xf
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#define PUPA_PARTITION_TYPE_EZD 0x55
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#define PUPA_PARTITION_TYPE_MINIX 0x80
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#define PUPA_PARTITION_TYPE_LINUX_MINIX 0x81
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#define PUPA_PARTITION_TYPE_EXT2FS 0x83
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#define PUPA_PARTITION_TYPE_LINUX_EXTENDED 0x85
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#define PUPA_PARTITION_TYPE_VSTAFS 0x9e
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#define PUPA_PARTITION_TYPE_FREEBSD 0xa5
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#define PUPA_PARTITION_TYPE_OPENBSD 0xa6
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#define PUPA_PARTITION_TYPE_NETBSD 0xa9
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#define PUPA_PARTITION_TYPE_LINUX_RAID 0xfd
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/* Constants for BSD disk label. */
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#define PUPA_PARTITION_BSD_LABEL_SECTOR 1
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#define PUPA_PARTITION_BSD_LABEL_MAGIC 0x82564557
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#define PUPA_PARTITION_BSD_MAX_ENTRIES 8
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/* BSD partition types. */
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#define PUPA_PARTITION_BSD_TYPE_UNUSED 0
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#define PUPA_PARTITION_BSD_TYPE_SWAP 1
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#define PUPA_PARTITION_BSD_TYPE_V6 2
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#define PUPA_PARTITION_BSD_TYPE_V7 3
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#define PUPA_PARTITION_BSD_TYPE_SYSV 4
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#define PUPA_PARTITION_BSD_TYPE_V71K 5
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#define PUPA_PARTITION_BSD_TYPE_V8 6
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#define PUPA_PARTITION_BSD_TYPE_BSDFFS 7
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#define PUPA_PARTITION_BSD_TYPE_MSDOS 8
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#define PUPA_PARTITION_BSD_TYPE_BSDLFS 9
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#define PUPA_PARTITION_BSD_TYPE_OTHER 10
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#define PUPA_PARTITION_BSD_TYPE_HPFS 11
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#define PUPA_PARTITION_BSD_TYPE_ISO9660 12
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#define PUPA_PARTITION_BSD_TYPE_BOOT 13
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/* FreeBSD-specific types. */
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#define PUPA_PARTITION_FREEBSD_TYPE_VINUM 14
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#define PUPA_PARTITION_FREEBSD_TYPE_RAID 15
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#define PUPA_PARTITION_FREEBSD_TYPE_JFS2 21
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/* NetBSD-specific types. */
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#define PUPA_PARTITION_NETBSD_TYPE_ADOS 14
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#define PUPA_PARTITION_NETBSD_TYPE_HFS 15
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#define PUPA_PARTITION_NETBSD_TYPE_FILECORE 16
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#define PUPA_PARTITION_NETBSD_TYPE_EXT2FS 17
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#define PUPA_PARTITION_NETBSD_TYPE_NTFS 18
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#define PUPA_PARTITION_NETBSD_TYPE_RAID 19
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#define PUPA_PARTITION_NETBSD_TYPE_CCD 20
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#define PUPA_PARTITION_NETBSD_TYPE_JFS2 21
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#define PUPA_PARTITION_NETBSD_TYPE_APPLEUFS 22
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/* OpenBSD-specific types. */
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#define PUPA_PARTITION_OPENBSD_TYPE_ADOS 14
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#define PUPA_PARTITION_OPENBSD_TYPE_HFS 15
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#define PUPA_PARTITION_OPENBSD_TYPE_FILECORE 16
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#define PUPA_PARTITION_OPENBSD_TYPE_EXT2FS 17
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#define PUPA_PARTITION_OPENBSD_TYPE_NTFS 18
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#define PUPA_PARTITION_OPENBSD_TYPE_RAID 19
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/* The BSD partition entry. */
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struct pupa_partition_bsd_entry
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{
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pupa_uint32_t size;
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pupa_uint32_t offset;
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pupa_uint32_t fragment_size;
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pupa_uint8_t fs_type;
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pupa_uint8_t fs_fragments;
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pupa_uint16_t fs_cylinders;
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} __attribute__ ((packed));
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/* The BSD disk label. Only define members useful for PUPA. */
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struct pupa_partition_disk_label
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{
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pupa_uint32_t magic;
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pupa_uint8_t padding[128];
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pupa_uint32_t magic2;
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pupa_uint16_t checksum;
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pupa_uint16_t num_partitions;
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pupa_uint32_t boot_size;
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pupa_uint32_t superblock_size;
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struct pupa_partition_bsd_entry entries[PUPA_PARTITION_BSD_MAX_ENTRIES];
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} __attribute__ ((packed));
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/* The partition entry. */
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struct pupa_partition_entry
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{
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/* If active, 0x80, otherwise, 0x00. */
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pupa_uint8_t flag;
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/* The head of the start. */
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pupa_uint8_t start_head;
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/* (S | ((C >> 2) & 0xC0)) where S is the sector of the start and C
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is the cylinder of the start. Note that S is counted from one. */
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pupa_uint8_t start_sector;
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/* (C & 0xFF) where C is the cylinder of the start. */
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pupa_uint8_t start_cylinder;
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/* The partition type. */
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pupa_uint8_t type;
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/* The end versions of start_head, start_sector and start_cylinder,
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respectively. */
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pupa_uint8_t end_head;
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pupa_uint8_t end_sector;
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pupa_uint8_t end_cylinder;
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/* The start sector. Note that this is counted from zero. */
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pupa_uint32_t start;
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/* The length in sector units. */
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pupa_uint32_t length;
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} __attribute__ ((packed));
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/* The structure of MBR. */
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struct pupa_partition_mbr
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{
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/* The code area (actually, including BPB). */
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pupa_uint8_t code[446];
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/* Four partition entries. */
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struct pupa_partition_entry entries[4];
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/* The signature 0xaa55. */
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pupa_uint16_t signature;
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} __attribute__ ((packed));
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/* Partition description. */
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struct pupa_partition
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{
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/* The start sector. */
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unsigned long start;
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/* The length in sector units. */
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unsigned long len;
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/* The offset of the partition table. */
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unsigned long offset;
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/* The offset of the extended partition. */
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unsigned long ext_offset;
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/* The index of this partition in the partition table. */
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int index;
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/* The DOS partition number. */
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int dos_part;
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/* The BSD partition number (a == 0). */
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int bsd_part;
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/* The DOS partition type. */
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int dos_type;
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/* The BSD partition type. */
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int bsd_type;
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};
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typedef struct pupa_partition *pupa_partition_t;
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struct pupa_disk;
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pupa_partition_t EXPORT_FUNC(pupa_partition_probe) (struct pupa_disk *disk,
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const char *str);
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pupa_err_t EXPORT_FUNC(pupa_partition_iterate) (struct pupa_disk *disk,
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int (*hook) (const pupa_partition_t partition));
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char *EXPORT_FUNC(pupa_partition_get_name) (const pupa_partition_t partition);
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static inline unsigned long
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pupa_partition_get_start (const pupa_partition_t p)
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{
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return p->start;
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}
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static inline unsigned long
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pupa_partition_get_len (const pupa_partition_t p)
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{
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return p->len;
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}
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static inline int
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pupa_partition_is_empty (int type)
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{
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return (type == PUPA_PARTITION_TYPE_NONE);
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}
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static inline int
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pupa_partition_is_extended (int type)
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{
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return (type == PUPA_PARTITION_TYPE_EXTENDED
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|| type == PUPA_PARTITION_TYPE_WIN95_EXTENDED
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|| type == PUPA_PARTITION_TYPE_LINUX_EXTENDED);
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}
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static inline int
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pupa_partition_is_bsd (int type)
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{
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return (type == PUPA_PARTITION_TYPE_FREEBSD
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|| type == PUPA_PARTITION_TYPE_OPENBSD
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|| type == PUPA_PARTITION_TYPE_NETBSD);
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}
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#endif /* ! PUPA_PARTITION_HEADER */
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