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71a4f36767
configuration in commit 2724273e8fd00b512596a77ee063f49b25f36507, titled "vmcore: add API to collect hardware dump in second kernel", in which device drivers may collect a device specific snapshot of the hardware/firmware state of their underlying devices, and export the data as a kdump ELF note with type NT_VMCOREDD. This patch recognizes the new ELF note(s) in both ELF and compressed kdump vmcore dumpfiles. The "help -[nD]" option shows basic information about each note, and two new "dev" command options have been introduced. The "dev -V" option displays an indexed list of each note, showing the device name, the dumpfile offset, and the size of each note. The "dev -v index [file]" option either dumps the contents of a note to the display screen in a human-readable format, or copies the note data directly to a specified file. (surendra@chelsio.com)
37 lines
1.0 KiB
C
37 lines
1.0 KiB
C
/*
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* vmcore.h
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*
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* Copyright (C) 2019 Chelsio Communications. All rights reserved.
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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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#ifndef _VMCORE_H
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#define _VMCORE_H
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#include <linux/types.h>
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#ifndef NT_VMCOREDD
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#define NT_VMCOREDD 0x700
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#endif
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#define VMCOREDD_NOTE_NAME "LINUX"
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#define VMCOREDD_MAX_NAME_BYTES 44
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struct vmcoredd_header {
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__u32 n_namesz; /* Name size */
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__u32 n_descsz; /* Content size */
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__u32 n_type; /* NT_VMCOREDD */
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__u8 name[8]; /* LINUX\0\0\0 */
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__u8 dump_name[VMCOREDD_MAX_NAME_BYTES]; /* Device dump's name */
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};
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#endif /* _VMCORE_H */
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