patch-2.4.20 linux-2.4.20/fs/partitions/ldm.h

• Lines: 281
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/partitions/ldm.h
• Orig date: Thu Nov 22 11:48:07 2001

diff -urN linux-2.4.19/fs/partitions/ldm.h linux-2.4.20/fs/partitions/ldm.h
@@ -1,10 +1,9 @@
-#ifndef _FS_PT_LDM_H_
-#define _FS_PT_LDM_H_
-/*
+/**
  * ldm - Part of the Linux-NTFS project.
  *
- * Copyright (C) 2001 Richard Russon <ldm@flatcap.org>
- * Copyright (C) 2001 Anton Altaparmakov <antona@users.sf.net>
+ * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
+ * Copyright (C) 2001      Anton Altaparmakov <aia21@cantab.net>
+ * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
  *
  * Documentation is available at http://linux-ntfs.sf.net/ldm
  *
@@ -23,16 +22,18 @@
  * in the file COPYING); if not, write to the Free Software Foundation,
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+
+#ifndef _FS_PT_LDM_H_
+#define _FS_PT_LDM_H_
+
 #include <linux/types.h>
+#include <linux/list.h>
+#include <linux/genhd.h>
+#include <linux/fs.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 */
+struct parsed_partitions;
 
 /* Magic numbers in CPU format. */
 #define MAGIC_VMDB	0x564D4442		/* VMDB */
@@ -41,41 +42,58 @@
 #define MAGIC_TOCBLOCK	0x544F43424C4F434B	/* TOCBLOCK */
 
 /* The defined vblk types. */
-#define VBLK_COMP		0x32		/* Component */
-#define VBLK_PART		0x33		/* Partition */
-#define VBLK_DSK1		0x34		/* Disk */
-#define VBLK_DSK2		0x44		/* Disk */
-#define VBLK_DGR1		0x35		/* Disk Group */
-#define VBLK_DGR2		0x45		/* Disk Group */
-#define VBLK_VOLU		0x51		/* Volume */
+#define VBLK_VOL5		0x51		/* Volume,     version 5 */
+#define VBLK_CMP3		0x32		/* Component,  version 3 */
+#define VBLK_PRT3		0x33		/* Partition,  version 3 */
+#define VBLK_DSK3		0x34		/* Disk,       version 3 */
+#define VBLK_DSK4		0x44		/* Disk,       version 4 */
+#define VBLK_DGR3		0x35		/* Disk Group, version 3 */
+#define VBLK_DGR4		0x45		/* Disk Group, version 4 */
+
+/* vblk flags indicating extra information will be present */
+#define	VBLK_FLAG_COMP_STRIPE	0x10
+#define	VBLK_FLAG_PART_INDEX	0x08
+#define	VBLK_FLAG_DGR3_IDS	0x08
+#define	VBLK_FLAG_DGR4_IDS	0x08
+#define	VBLK_FLAG_VOLU_ID1	0x08
+#define	VBLK_FLAG_VOLU_ID2	0x20
+#define	VBLK_FLAG_VOLU_SIZE	0x80
+#define	VBLK_FLAG_VOLU_DRIVE	0x02
+
+/* size of a vblk's static parts */
+#define VBLK_SIZE_HEAD		16
+#define VBLK_SIZE_CMP3		22		/* Name and version */
+#define VBLK_SIZE_DGR3		12
+#define VBLK_SIZE_DGR4		44
+#define VBLK_SIZE_DSK3		12
+#define VBLK_SIZE_DSK4		45
+#define VBLK_SIZE_PRT3		28
+#define VBLK_SIZE_VOL5		59
+
+/* component types */
+#define COMP_STRIPE		0x01		/* Stripe-set */
+#define COMP_BASIC		0x02		/* Basic disk */
+#define COMP_RAID		0x03		/* Raid-set */
 
 /* 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
+#define OFF_PRIV1		6		/* Offset of the first privhead
 						   relative to the start of the
-						   device in units of
-						   LDM_BLOCKSIZE. */
+						   device in sectors */
 
-/* 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. */
+/* Offsets to structures within the LDM Database in sectors. */
+#define OFF_PRIV2		1856		/* Backup private headers. */
+#define OFF_PRIV3		2047
+
+#define OFF_TOCB1		1		/* Tables of contents. */
+#define OFF_TOCB2		2
+#define OFF_TOCB3		2045
+#define OFF_TOCB4		2046
+
+#define OFF_VMDB		17		/* List of partitions. */
+
+#define WIN2K_DYNAMIC_PARTITION	0x42		/* Formerly SFS (Landis). */
 
 #define TOC_BITMAP1		"config"	/* Names of the two defined */
 #define TOC_BITMAP2		"log"		/* bitmaps in the TOCBLOCK. */
@@ -85,49 +103,42 @@
 #define BE32(x)			((u32)be32_to_cpu(get_unaligned((u32*)(x))))
 #define BE64(x)			((u64)be64_to_cpu(get_unaligned((u64*)(x))))
 
-/* Borrowed from msdos.c. */
+/* 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);		\
-				})
 
-/* In memory LDM database structures. */
+struct frag {				/* VBLK Fragment handling */
+	struct list_head list;
+	u32		group;
+	u8		num;		/* Total number of records */
+	u8		rec;		/* This is record number n */
+	u8		map;		/* Which portions are in use */
+	u8		data[0];
+};
 
-#define DISK_ID_SIZE		64	/* Size in bytes. */
+/* In memory LDM database structures. */
 
-struct ldmdisk {
-	u64	obj_id;
-	u8	disk_id[DISK_ID_SIZE];
-};
+#define GUID_SIZE		16
 
-struct privhead	{			/* Offsets and sizes are in sectors. */
+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];
+	u8	disk_id[GUID_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 {
+struct vmdb {				/* VMDB: The database header */
 	u16	ver_major;
 	u16	ver_minor;
 	u32	vblk_size;
@@ -135,23 +146,76 @@
 	u32	last_vblk_seq;
 };
 
-struct vblk {
-	u8	name[64];
-	u8	vblk_type;
-	u64	obj_id;
+struct vblk_comp {			/* VBLK Component */
+	u8	state[16];
+	u64	parent_id;
+	u8	type;
+	u8	children;
+	u16	chunksize;
+};
+
+struct vblk_dgrp {			/* VBLK Disk Group */
+	u8	disk_id[64];
+};
+
+struct vblk_disk {			/* VBLK Disk */
+	u8	disk_id[GUID_SIZE];
+	u8	alt_name[128];
+};
+
+struct vblk_part {			/* VBLK Partition */
+	u64	start;
+	u64	size;			/* start, size and vol_off in sectors */
+	u64	volume_offset;
+	u64	parent_id;
 	u64	disk_id;
-	u64	start_sector;
-	u64	num_sectors;
+	u8	partnum;
+};
+
+struct vblk_volu {			/* VBLK Volume */
+	u8	volume_type[16];
+	u8	volume_state[16];
+	u8	guid[16];
+	u8	drive_hint[4];
+	u64	size;
+	u8	partition_type;
 };
 
-struct ldm_part {
-	struct list_head part_list;
-	unsigned long start;
-	unsigned long size;
+struct vblk_head {			/* VBLK standard header */
+	u32 group;
+	u16 rec;
+	u16 nrec;
+};
+
+struct vblk {				/* Generalised VBLK */
+	u8	name[64];
+	u64	obj_id;
+	u32	sequence;
+	u8	flags;
+	u8	type;
+	union {
+		struct vblk_comp comp;
+		struct vblk_dgrp dgrp;
+		struct vblk_disk disk;
+		struct vblk_part part;
+		struct vblk_volu volu;
+	} vblk;
+	struct list_head list;
+};
+
+struct ldmdb {				/* Cache of the database */
+	struct privhead ph;
+	struct tocblock toc;
+	struct vmdb     vm;
+	struct list_head v_dgrp;
+	struct list_head v_disk;
+	struct list_head v_volu;
+	struct list_head v_comp;
+	struct list_head v_part;
 };
 
-int ldm_partition(struct gendisk *hd, struct block_device *bdev,
-		unsigned long first_sector, int first_part_minor);
+int ldm_partition (struct gendisk *hd, struct block_device *bdev,
+	unsigned long first_sector, int first_minor);
 
 #endif /* _FS_PT_LDM_H_ */