mirror of
https://github.com/crash-utility/crash
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045c00ac34
the header of compressed kdumps, and the new DUMP_ELF_INCOMPLETE flag in the header of ELF kdumps. If the makedumpfile(8) facility fails to complete the creation of compressed or ELF kdump vmcore files due to ENOSPC or other error, it will mark the vmcore as incomplete. If either flag is set, the crash utility will issue a warning that the dumpfile is known to be incomplete during initialization, just prior to the system banner display. When reads are attempted on missing data, a read error will be returned. As an alternative, zero-filled data will be returned if the "--zero_excluded" command line flag is used, or the "zero_excluded" runtime variable is set to "on". In either case, the read errors or zero-filled memory may cause the crash session to fail entirely, cause commands to fail, or may result in other unpredictable runtime behavior. (anderson@redhat.com, zhouwj-fnst@cn.fujitsu.com)
101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
/*
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* diskdump.h
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*
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* Copyright (C) 2004, 2005, 2006 David Anderson
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* Copyright (C) 2004, 2005, 2006 Red Hat, Inc. All rights reserved.
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* Copyright (C) 2005 FUJITSU LIMITED
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* Copyright (C) 2005 NEC Corporation
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*
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* This program 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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#include <elf.h>
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#define divideup(x, y) (((x) + ((y) - 1)) / (y))
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#define round(x, y) (((x) / (y)) * (y))
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#define DUMP_PARTITION_SIGNATURE "diskdump"
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#define SIG_LEN (sizeof(DUMP_PARTITION_SIGNATURE) - 1)
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#define DISK_DUMP_SIGNATURE "DISKDUMP"
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#define KDUMP_SIGNATURE "KDUMP "
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#define DUMP_HEADER_COMPLETED 0
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#define DUMP_HEADER_INCOMPLETED 1
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#define DUMP_HEADER_COMPRESSED 8
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struct disk_dump_header {
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char signature[SIG_LEN]; /* = "DISKDUMP" */
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int header_version; /* Dump header version */
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struct new_utsname utsname; /* copy of system_utsname */
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struct timeval timestamp; /* Time stamp */
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unsigned int status; /* Above flags */
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int block_size; /* Size of a block in byte */
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int sub_hdr_size; /* Size of arch dependent
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header in blocks */
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unsigned int bitmap_blocks; /* Size of Memory bitmap in
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block */
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unsigned int max_mapnr; /* = max_mapnr, OBSOLETE!
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32bit only, full 64bit
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in sub header. */
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unsigned int total_ram_blocks;/* Number of blocks should be
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written */
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unsigned int device_blocks; /* Number of total blocks in
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* the dump device */
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unsigned int written_blocks; /* Number of written blocks */
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unsigned int current_cpu; /* CPU# which handles dump */
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int nr_cpus; /* Number of CPUs */
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struct task_struct *tasks[0];
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};
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struct disk_dump_sub_header {
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long elf_regs;
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};
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struct kdump_sub_header {
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unsigned long phys_base;
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int dump_level; /* header_version 1 and later */
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int split; /* header_version 2 and later */
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unsigned long start_pfn; /* header_version 2 and later,
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OBSOLETE! 32bit only, full 64bit
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in start_pfn_64. */
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unsigned long end_pfn; /* header_version 2 and later,
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OBSOLETE! 32bit only, full 64bit
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in end_pfn_64. */
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off_t offset_vmcoreinfo; /* header_version 3 and later */
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unsigned long size_vmcoreinfo; /* header_version 3 and later */
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off_t offset_note; /* header_version 4 and later */
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unsigned long size_note; /* header_version 4 and later */
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off_t offset_eraseinfo; /* header_version 5 and later */
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unsigned long size_eraseinfo; /* header_version 5 and later */
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unsigned long long start_pfn_64; /* header_version 6 and later */
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unsigned long long end_pfn_64; /* header_version 6 and later */
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unsigned long long max_mapnr_64; /* header_version 6 and later */
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};
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/* page flags */
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#define DUMP_DH_COMPRESSED_ZLIB 0x1 /* page is compressed with zlib */
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#define DUMP_DH_COMPRESSED_LZO 0x2 /* page is compressed with lzo */
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#define DUMP_DH_COMPRESSED_SNAPPY 0x4 /* page is compressed with snappy */
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#define DUMP_DH_COMPRESSED_INCOMPLETE 0x8 /* dumpfile is incomplete */
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/* descriptor of each page for vmcore */
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typedef struct page_desc {
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off_t offset; /* the offset of the page data*/
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unsigned int size; /* the size of this dump page */
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unsigned int flags; /* flags */
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unsigned long long page_flags; /* page flags */
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} page_desc_t;
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#define DISKDUMP_CACHED_PAGES (16)
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#define PAGE_VALID (0x1) /* flags */
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#define DISKDUMP_VALID_PAGE(flags) ((flags) & PAGE_VALID)
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