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crash/lkcd_dump_v5.h

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/* lkcd_dump_v5.h - core analysis suite
*
* Copyright (C) 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002, 2003, 2004, 2005, 2006 David Anderson
* Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc. All rights reserved.
*
* 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.
*/
/*
* Kernel header file for Linux crash dumps.
*
* Created by: Matt Robinson (yakker@sgi.com)
* Copyright 1999 Silicon Graphics, Inc. All rights reserved.
*
* vmdump.h to dump.h by: Matt D. Robinson (yakker@sourceforge.net)
* Copyright 2001 Matt D. Robinson. All rights reserved.
*
* Most of this is the same old stuff from vmdump.h, except now we're
* actually a stand-alone driver plugged into the block layer interface,
* with the exception that we now allow for compression modes externally
* loaded (e.g., someone can come up with their own).
*/
/* This header file includes all structure definitions for crash dumps. */
#ifndef _DUMP_H
#define _DUMP_H
//#include <linux/list.h>
/* define TRUE and FALSE for use in our dump modules */
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef MCLX
/*
* MCLX NOTE: the architecture-specific headers are being ignored until
* deemed necessary; crash has never used them functionally, and only
* referencing them in the dump_sgi_environment() helper routines.
*/
/* necessary header files */
#include <asm/dump.h> /* for architecture-specific header */
#endif
#define UTSNAME_ENTRY_SZ 65
/* necessary header definitions in all cases */
#define DUMP_KIOBUF_NUMBER 0xdeadbeef /* special number for kiobuf maps */
/* size of a dump header page */
#define DUMP_PAGE_SZ 64 * 1024 /* size of dump page buffer */
/* header definitions for s390 dump */
#define DUMP_MAGIC_S390 0xa8190173618f23fdULL /* s390 magic number */
#define S390_DUMP_HEADER_SIZE 4096
/* standard header definitions */
#define DUMP_MAGIC_NUMBER 0xa8190173618f23edULL /* dump magic number */
#define DUMP_MAGIC_LIVE 0xa8190173618f23cdULL /* live magic number */
#define DUMP_VERSION_NUMBER 0x5 /* dump version number */
#define DUMP_PANIC_LEN 0x100 /* dump panic string length */
/* dump levels - type specific stuff added later -- add as necessary */
#define DUMP_LEVEL_NONE 0x0 /* no dumping at all -- just bail */
#define DUMP_LEVEL_HEADER 0x1 /* kernel dump header only */
#define DUMP_LEVEL_KERN 0x2 /* dump header and kernel pages */
#define DUMP_LEVEL_USED 0x4 /* dump header, kernel/user pages */
#define DUMP_LEVEL_ALL 0x8 /* dump header, all memory pages */
/* dump compression options -- add as necessary */
#define DUMP_COMPRESS_NONE 0x0 /* don't compress this dump */
#define DUMP_COMPRESS_RLE 0x1 /* use RLE compression */
#define DUMP_COMPRESS_GZIP 0x2 /* use GZIP compression */
/* dump flags - any dump-type specific flags -- add as necessary */
#define DUMP_FLAGS_NONE 0x0 /* no flags are set for this dump */
#define DUMP_FLAGS_NONDISRUPT 0x1 /* try to keep running after dump */
/* dump header flags -- add as necessary */
#define DUMP_DH_FLAGS_NONE 0x0 /* no flags set (error condition!) */
#define DUMP_DH_RAW 0x1 /* raw page (no compression) */
#define DUMP_DH_COMPRESSED 0x2 /* page is compressed */
#define DUMP_DH_END 0x4 /* end marker on a full dump */
/* names for various dump tunables (they are now all read-only) */
#define DUMP_ROOT_NAME "sys/dump"
#define DUMP_DEVICE_NAME "dump_device"
#define DUMP_COMPRESS_NAME "dump_compress"
#define DUMP_LEVEL_NAME "dump_level"
#define DUMP_FLAGS_NAME "dump_flags"
/* page size for gzip compression -- buffered beyond PAGE_SIZE slightly */
#define DUMP_DPC_PAGE_SIZE (PAGE_SIZE + 512)
/* dump ioctl() control options */
#define DIOSDUMPDEV 1 /* set the dump device */
#define DIOGDUMPDEV 2 /* get the dump device */
#define DIOSDUMPLEVEL 3 /* set the dump level */
#define DIOGDUMPLEVEL 4 /* get the dump level */
#define DIOSDUMPFLAGS 5 /* set the dump flag parameters */
#define DIOGDUMPFLAGS 6 /* get the dump flag parameters */
#define DIOSDUMPCOMPRESS 7 /* set the dump compress level */
#define DIOGDUMPCOMPRESS 8 /* get the dump compress level */
/* the major number used for the dumping device */
#ifndef DUMP_MAJOR
#define DUMP_MAJOR 227
#endif
/*
* Structure: dump_header_t
* Function: This is the header dumped at the top of every valid crash
* dump.
* easy reassembly of each crash dump page. The address bits
* are split to make things easier for 64-bit/32-bit system
* conversions.
*/
typedef struct _dump_header_s {
/* the dump magic number -- unique to verify dump is valid */
uint64_t dh_magic_number;
/* the version number of this dump */
uint32_t dh_version;
/* the size of this header (in case we can't read it) */
uint32_t dh_header_size;
/* the level of this dump (just a header?) */
uint32_t dh_dump_level;
/* the size of a Linux memory page (4K, 8K, 16K, etc.) */
uint32_t dh_page_size;
/* the size of all physical memory */
uint64_t dh_memory_size;
/* the start of physical memory */
uint64_t dh_memory_start;
/* the end of physical memory */
uint64_t dh_memory_end;
/* the number of pages in this dump specifically */
uint32_t dh_num_pages;
/* the panic string, if available */
char dh_panic_string[DUMP_PANIC_LEN];
/* the time of the system crash */
struct timeval dh_time;
/* the NEW utsname (uname) information -- in character form */
/* we do this so we don't have to include utsname.h */
/* plus it helps us be more architecture independent */
/* now maybe one day soon they'll make the [65] a #define! */
char dh_utsname_sysname[65];
char dh_utsname_nodename[65];
char dh_utsname_release[65];
char dh_utsname_version[65];
char dh_utsname_machine[65];
char dh_utsname_domainname[65];
/* the address of current task (OLD = task_struct *, NEW = void *) */
void *dh_current_task;
/* what type of compression we're using in this dump (if any) */
uint32_t dh_dump_compress;
/* any additional flags */
uint32_t dh_dump_flags;
/* any additional flags */
uint32_t dh_dump_device;
} dump_header_t;
/*
* Structure: dump_page_t
* Function: To act as the header associated to each physical page of
* memory saved in the system crash dump. This allows for
* easy reassembly of each crash dump page. The address bits
* are split to make things easier for 64-bit/32-bit system
* conversions.
*/
typedef struct _dump_page_s {
/* the address of this dump page */
uint64_t dp_address;
/* the size of this dump page */
uint32_t dp_size;
/* flags (currently DUMP_COMPRESSED, DUMP_RAW or DUMP_END) */
uint32_t dp_flags;
} dump_page_t;
/*
* This structure contains information needed for the lkcdutils
* package (particularly lcrash) to determine what information is
* associated to this kernel, specifically.
*/
typedef struct lkcdinfo_s {
int arch;
int ptrsz;
int byte_order;
int linux_release;
int page_shift;
int page_size;
uint64_t page_mask;
uint64_t page_offset;
int stack_offset;
} lkcdinfo_t;
#ifdef __KERNEL__
/*
* Structure: dump_compress_t
* Function: This is what an individual compression mechanism can use
* to plug in their own compression techniques. It's always
* best to build these as individual modules so that people
* can put in whatever they want.
*/
typedef struct dump_compress_s {
/* the list_head structure for list storage */
struct list_head list;
/* the type of compression to use (DUMP_COMPRESS_XXX) */
int compress_type;
/* the compression function to call */
int (*compress_func)(char *, int, char *, int);
} dump_compress_t;
extern int dump_init(void);
extern void dump_execute(char *, struct pt_regs *);
extern int page_is_ram(unsigned long);
#endif /* __KERNEL__ */
#endif /* _DUMP_H */
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