patch-2.4.8 linux/fs/partitions/ldm.h

• Lines: 151
• Date: Fri Aug 10 18:15:44 2001
• Orig file: v2.4.7/linux/fs/partitions/ldm.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.7/linux/fs/partitions/ldm.h linux/fs/partitions/ldm.h
@@ -0,0 +1,150 @@
+#ifndef _FS_PT_LDM_H_
+#define _FS_PT_LDM_H_
+/*
+ * $Id: ldm.h,v 1.13 2001/07/23 19:49:49 antona Exp $
+ *
+ * ldm - Part of the Linux-NTFS project.
+ *
+ * Copyright (C) 2001 Richard Russon <ntfs@flatcap.org>
+ * Copyright (C) 2001 Anton Altaparmakov <antona@users.sf.net>
+ *
+ * Documentation is available at http://linux-ntfs.sf.net/ldm
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (in the main directory of the Linux-NTFS source
+ * in the file COPYING); if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <asm/types.h>
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+#include <linux/genhd.h>
+
+/* Borrowed from kernel.h. */
+#define LDM_PREFIX	"LDM: "	   /* Prefix our error messages with this. */
+#define LDM_CRIT	KERN_CRIT	LDM_PREFIX /* critical conditions */
+#define LDM_ERR		KERN_ERR	LDM_PREFIX /* error conditions */
+#define LDM_DEBUG	KERN_DEBUG	LDM_PREFIX /* debug-level messages */
+
+/* Magic numbers in CPU format. */
+#define MAGIC_VMDB	0x564D4442		/* VMDB */
+#define MAGIC_VBLK	0x56424C4B		/* VBLK */
+#define MAGIC_PRIVHEAD	0x5052495648454144	/* PRIVHEAD */
+#define MAGIC_TOCBLOCK	0x544F43424C4F434B	/* TOCBLOCK */
+
+/* The defined vblk types. */
+#define VBLK_COMP		0x32		/* Component */
+#define VBLK_PART		0x33		/* Partition */
+#define VBLK_DISK		0x34		/* Disk */
+#define VBLK_DGRP		0x45		/* Disk Group */
+#define VBLK_VOLU		0x51		/* Volume */
+
+/* Other constants. */
+#define LDM_BLOCKSIZE		1024		/* Size of block in bytes. */
+#define LDM_DB_SIZE		2048		/* Size in sectors (= 1MiB). */
+#define LDM_FIRST_PART_OFFSET	4		/* Add this to first_part_minor
+						   to get to the first data
+						   partition device minor. */
+
+#define OFF_PRIVHEAD1		3		/* Offset of the first privhead
+						   relative to the start of the
+						   device in units of
+						   LDM_BLOCKSIZE. */
+
+/* Offsets to structures within the LDM Database in units of LDM_BLOCKSIZE. */
+#define OFF_PRIVHEAD2		928		/* Backup private headers. */
+#define OFF_PRIVHEAD3		1023
+
+#define OFF_TOCBLOCK1		0		/* Tables of contents. */
+#define OFF_TOCBLOCK2		1
+#define OFF_TOCBLOCK3		1022
+#define OFF_TOCBLOCK4		1023
+
+#define OFF_VMDB		8		/* List of partitions. */
+#define OFF_VBLK		9
+
+#define WIN2K_DYNAMIC_PARTITION		0x42	/* Formerly SFS (Landis). */
+#define WIN2K_EXTENDED_PARTITION	0x05	/* A standard extended
+						   partition. */
+
+#define TOC_BITMAP1		"config"	/* Names of the two defined */
+#define TOC_BITMAP2		"log"		/* bitmaps in the TOCBLOCK. */
+
+/* Borrowed from msdos.c */
+#define SYS_IND(p)		(get_unaligned(&p->sys_ind))
+#define NR_SECTS(p)		({ __typeof__(p->nr_sects) __a =	\
+					get_unaligned(&p->nr_sects);	\
+					le32_to_cpu(__a);		\
+				})
+#define START_SECT(p)		({ __typeof__(p->start_sect) __a =	\
+					get_unaligned(&p->start_sect);	\
+					le32_to_cpu(__a);		\
+				})
+
+/* Most numbers we deal with are big-endian and won't be aligned. */
+#define BE16(x)			((u16)be16_to_cpu(get_unaligned((u16*)(x))))
+#define BE32(x)			((u32)be32_to_cpu(get_unaligned((u32*)(x))))
+#define BE64(x)			((u64)be64_to_cpu(get_unaligned((u64*)(x))))
+
+/* In memory LDM database structures. */
+
+#define DISK_ID_SIZE		64	/* Size in bytes. */
+
+struct ldmdisk {
+	u64	obj_id;
+	u8	disk_id[DISK_ID_SIZE];
+};
+
+struct privhead	{			/* Offsets and sizes are in sectors. */
+	u16	ver_major;
+	u16	ver_minor;
+	u64	logical_disk_start;
+	u64	logical_disk_size;
+	u64	config_start;
+	u64	config_size;
+	u8	disk_id[DISK_ID_SIZE];
+};
+
+struct tocblock {			/* We have exactly two bitmaps. */
+	u8	bitmap1_name[16];
+	u64	bitmap1_start;
+	u64	bitmap1_size;
+	/*u64	bitmap1_flags;*/
+	u8	bitmap2_name[16];
+	u64	bitmap2_start;
+	u64	bitmap2_size;
+	/*u64	bitmap2_flags;*/
+};
+
+struct vmdb {
+	u16	ver_major;
+	u16	ver_minor;
+	u32	vblk_size;
+	u32	vblk_offset;
+	u32	last_vblk_seq;
+};
+
+struct vblk {
+	u8	name[64];
+	u8	vblk_type;
+	u64	obj_id;
+	u64	disk_id;
+	u64	start_sector;
+	u64	num_sectors;
+};
+
+int ldm_partition(struct gendisk *hd, kdev_t dev, unsigned long first_sector,
+		int first_part_minor);
+
+#endif /* _FS_PT_LDM_H_ */
+