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/*
* QEMU dump
*
* Copyright Fujitsu, Corp. 2011, 2012
*
* Authors:
* Wen Congyang <wency@cn.fujitsu.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef DUMP_H
#define DUMP_H
#include "qapi/qapi-types-dump.h"
#include "qemu/thread.h"
#define MAKEDUMPFILE_SIGNATURE "makedumpfile"
#define MAX_SIZE_MDF_HEADER (4096) /* max size of makedumpfile_header */
#define TYPE_FLAT_HEADER (1) /* type of flattened format */
#define VERSION_FLAT_HEADER (1) /* version of flattened format */
#define END_FLAG_FLAT_HEADER (-1)
#ifndef ARCH_PFN_OFFSET
#define ARCH_PFN_OFFSET (0)
#endif
/*
* flag for compressed format
*/
#define DUMP_DH_COMPRESSED_ZLIB (0x1)
#define DUMP_DH_COMPRESSED_LZO (0x2)
#define DUMP_DH_COMPRESSED_SNAPPY (0x4)
#define KDUMP_SIGNATURE "KDUMP "
#define SIG_LEN (sizeof(KDUMP_SIGNATURE) - 1)
#define DUMP_LEVEL (1)
#define DISKDUMP_HEADER_BLOCKS (1)
#include "sysemu/dump-arch.h"
#include "sysemu/memory_mapping.h"
typedef struct QEMU_PACKED MakedumpfileHeader {
char signature[16]; /* = "makedumpfile" */
int64_t type;
int64_t version;
} MakedumpfileHeader;
typedef struct QEMU_PACKED MakedumpfileDataHeader {
int64_t offset;
int64_t buf_size;
} MakedumpfileDataHeader;
typedef struct QEMU_PACKED NewUtsname {
char sysname[65];
char nodename[65];
char release[65];
char version[65];
char machine[65];
char domainname[65];
} NewUtsname;
typedef struct QEMU_PACKED DiskDumpHeader32 {
char signature[SIG_LEN]; /* = "KDUMP " */
uint32_t header_version; /* Dump header version */
NewUtsname utsname; /* copy of system_utsname */
char timestamp[10]; /* Time stamp */
uint32_t status; /* Above flags */
uint32_t block_size; /* Size of a block in byte */
uint32_t sub_hdr_size; /* Size of arch dependent header in block */
uint32_t bitmap_blocks; /* Size of Memory bitmap in block */
uint32_t max_mapnr; /* = max_mapnr ,
obsoleted in header_version 6 */
uint32_t total_ram_blocks; /* Number of blocks should be written */
uint32_t device_blocks; /* Number of total blocks in dump device */
uint32_t written_blocks; /* Number of written blocks */
uint32_t current_cpu; /* CPU# which handles dump */
uint32_t nr_cpus; /* Number of CPUs */
} DiskDumpHeader32;
typedef struct QEMU_PACKED DiskDumpHeader64 {
char signature[SIG_LEN]; /* = "KDUMP " */
uint32_t header_version; /* Dump header version */
NewUtsname utsname; /* copy of system_utsname */
char timestamp[22]; /* Time stamp */
uint32_t status; /* Above flags */
uint32_t block_size; /* Size of a block in byte */
uint32_t sub_hdr_size; /* Size of arch dependent header in block */
uint32_t bitmap_blocks; /* Size of Memory bitmap in block */
uint32_t max_mapnr; /* = max_mapnr,
obsoleted in header_version 6 */
uint32_t total_ram_blocks; /* Number of blocks should be written */
uint32_t device_blocks; /* Number of total blocks in dump device */
uint32_t written_blocks; /* Number of written blocks */
uint32_t current_cpu; /* CPU# which handles dump */
uint32_t nr_cpus; /* Number of CPUs */
} DiskDumpHeader64;
typedef struct QEMU_PACKED KdumpSubHeader32 {
uint32_t phys_base;
uint32_t dump_level; /* header_version 1 and later */
uint32_t split; /* header_version 2 and later */
uint32_t start_pfn; /* header_version 2 and later,
obsoleted in header_version 6 */
uint32_t end_pfn; /* header_version 2 and later,
obsoleted in header_version 6 */
uint64_t offset_vmcoreinfo; /* header_version 3 and later */
uint32_t size_vmcoreinfo; /* header_version 3 and later */
uint64_t offset_note; /* header_version 4 and later */
uint32_t note_size; /* header_version 4 and later */
uint64_t offset_eraseinfo; /* header_version 5 and later */
uint32_t size_eraseinfo; /* header_version 5 and later */
uint64_t start_pfn_64; /* header_version 6 and later */
uint64_t end_pfn_64; /* header_version 6 and later */
uint64_t max_mapnr_64; /* header_version 6 and later */
} KdumpSubHeader32;
typedef struct QEMU_PACKED KdumpSubHeader64 {
uint64_t phys_base;
uint32_t dump_level; /* header_version 1 and later */
uint32_t split; /* header_version 2 and later */
uint64_t start_pfn; /* header_version 2 and later,
obsoleted in header_version 6 */
uint64_t end_pfn; /* header_version 2 and later,
obsoleted in header_version 6 */
uint64_t offset_vmcoreinfo; /* header_version 3 and later */
uint64_t size_vmcoreinfo; /* header_version 3 and later */
uint64_t offset_note; /* header_version 4 and later */
uint64_t note_size; /* header_version 4 and later */
uint64_t offset_eraseinfo; /* header_version 5 and later */
uint64_t size_eraseinfo; /* header_version 5 and later */
uint64_t start_pfn_64; /* header_version 6 and later */
uint64_t end_pfn_64; /* header_version 6 and later */
uint64_t max_mapnr_64; /* header_version 6 and later */
} KdumpSubHeader64;
typedef struct DataCache {
DumpState *state; /* dump state related to this data */
uint8_t *buf; /* buffer for cached data */
size_t buf_size; /* size of the buf */
size_t data_size; /* size of cached data in buf */
off_t offset; /* offset of the file */
} DataCache;
typedef struct QEMU_PACKED PageDescriptor {
uint64_t offset; /* the offset of the page data*/
uint32_t size; /* the size of this dump page */
uint32_t flags; /* flags */
uint64_t page_flags; /* page flags */
} PageDescriptor;
typedef struct DumpState {
GuestPhysBlockList guest_phys_blocks;
ArchDumpInfo dump_info;
MemoryMappingList list;
bool resume;
bool detached;
bool kdump_raw;
hwaddr memory_offset;
int fd;
/*
* Dump filter area variables
*
* A filtered dump only contains the guest memory designated by
* the start address and length variables defined below.
*
* If length is 0, no filtering is applied.
*/
int64_t filter_area_begin; /* Start address of partial guest memory area */
int64_t filter_area_length; /* Length of partial guest memory area */
/* Elf dump related data */
uint32_t phdr_num;
uint32_t shdr_num;
ssize_t note_size;
hwaddr shdr_offset;
hwaddr phdr_offset;
hwaddr section_offset;
hwaddr note_offset;
void *elf_section_hdrs; /* Pointer to section header buffer */
void *elf_section_data; /* Pointer to section data buffer */
uint64_t elf_section_data_size; /* Size of section data */
GArray *string_table_buf; /* String table data buffer */
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
uint32_t nr_cpus; /* number of guest's cpu */
uint64_t max_mapnr; /* the biggest guest's phys-mem's number */
size_t len_dump_bitmap; /* the size of the place used to store
dump_bitmap in vmcore */
off_t offset_dump_bitmap; /* offset of dump_bitmap part in vmcore */
off_t offset_page; /* offset of page part in vmcore */
size_t num_dumpable; /* number of page that can be dumped */
uint32_t flag_compress; /* indicate the compression format */
DumpStatus status; /* current dump status */
bool has_format; /* whether format is provided */
DumpGuestMemoryFormat format; /* valid only if has_format == true */
QemuThread dump_thread; /* thread for detached dump */
int64_t total_size; /* total memory size (in bytes) to
* be dumped. When filter is
* enabled, this will only count
* those to be written. */
int64_t written_size; /* written memory size (in bytes),
* this could be used to calculate
* how much work we have
* finished. */
uint8_t *guest_note; /* ELF note content */
size_t guest_note_size;
} DumpState;
uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
uint32_t cpu_to_dump32(DumpState *s, uint32_t val);
uint64_t cpu_to_dump64(DumpState *s, uint64_t val);
int64_t dump_filtered_memblock_size(GuestPhysBlock *block, int64_t filter_area_start,
int64_t filter_area_length);
int64_t dump_filtered_memblock_start(GuestPhysBlock *block, int64_t filter_area_start,
int64_t filter_area_length);
#endif
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