/* 

 * diskdump.h

 *

 * Copyright (C) 2004, 2005, 2006  David Anderson

 * Copyright (C) 2004, 2005, 2006  Red Hat, Inc. All rights reserved.

 * Copyright (C) 2005  FUJITSU LIMITED

 * Copyright (C) 2005  NEC Corporation

 *

 * 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.

 */

#include <elf.h>

#define divideup(x, y)	(((x) + ((y) - 1)) / (y))

#define round(x, y)	(((x) / (y)) * (y))

#define DUMP_PARTITION_SIGNATURE	"diskdump"

#define SIG_LEN (sizeof(DUMP_PARTITION_SIGNATURE) - 1)

#define DISK_DUMP_SIGNATURE		"DISKDUMP"

#define KDUMP_SIGNATURE			"KDUMP   "

#define DUMP_HEADER_COMPLETED	0

#define DUMP_HEADER_INCOMPLETED 1

#define DUMP_HEADER_COMPRESSED  8

struct disk_dump_header {

	char			signature[SIG_LEN];	/* = "DISKDUMP" */

	int			header_version; /* Dump header version */

	struct new_utsname	utsname;	/* copy of system_utsname */

	struct timeval		timestamp;	/* Time stamp */

	unsigned int		status; 	/* Above flags */

	int			block_size;	/* Size of a block in byte */

	int			sub_hdr_size;	/* Size of arch dependent

						   header in blocks */

	unsigned int		bitmap_blocks;	/* Size of Memory bitmap in

						   block */

	unsigned int		max_mapnr;	/* = max_mapnr, OBSOLETE!

						   32bit only, full 64bit

						   in sub header. */

	unsigned int		total_ram_blocks;/* Number of blocks should be

						   written */

	unsigned int		device_blocks;	/* Number of total blocks in

						 * the dump device */

	unsigned int		written_blocks; /* Number of written blocks */

	unsigned int		current_cpu;	/* CPU# which handles dump */

	int			nr_cpus;	/* Number of CPUs */

	struct task_struct	*tasks[0];

};

struct disk_dump_sub_header {

	long		elf_regs;

};

struct kdump_sub_header {

	unsigned long	phys_base;

	int		dump_level;         /* header_version 1 and later */

	int		split;              /* header_version 2 and later */

	unsigned long	start_pfn;          /* header_version 2 and later,

					       OBSOLETE! 32bit only, full 64bit

					       in start_pfn_64. */

	unsigned long	end_pfn;            /* header_version 2 and later,

					       OBSOLETE! 32bit only, full 64bit

					       in end_pfn_64. */

	off_t		offset_vmcoreinfo;  /* header_version 3 and later */

	unsigned long	size_vmcoreinfo;    /* header_version 3 and later */

	off_t		offset_note;        /* header_version 4 and later */

	unsigned long	size_note;          /* header_version 4 and later */

	off_t		offset_eraseinfo;   /* header_version 5 and later */

	unsigned long	size_eraseinfo;     /* header_version 5 and later */

	unsigned long long start_pfn_64;    /* header_version 6 and later */

	unsigned long long end_pfn_64;      /* header_version 6 and later */

	unsigned long long max_mapnr_64;    /* header_version 6 and later */

};

/* page flags */

#define DUMP_DH_COMPRESSED_ZLIB    0x1   /* page is compressed with zlib */

#define DUMP_DH_COMPRESSED_LZO     0x2   /* page is compressed with lzo */

#define DUMP_DH_COMPRESSED_SNAPPY  0x4   /* page is compressed with snappy */

#define DUMP_DH_COMPRESSED_INCOMPLETE  0x8   /* dumpfile is incomplete */

#define DUMP_DH_EXCLUDED_VMEMMAP   0x10  /* unused vmemmap pages are excluded */

/* descriptor of each page for vmcore */

typedef struct page_desc {

	off_t			offset;		/* the offset of the page data*/

	unsigned int		size;		/* the size of this dump page */

	unsigned int		flags;		/* flags */

	unsigned long long	page_flags;	/* page flags */

} page_desc_t;

#define DISKDUMP_CACHED_PAGES	(16)

#define PAGE_VALID		(0x1)	/* flags */

#define DISKDUMP_VALID_PAGE(flags)	((flags) & PAGE_VALID)