/* * QEMU dump * * Copyright Fujitsu, Corp. 2011, 2012 * * Authors: * Wen Congyang * * 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 #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) #define ARCH_PFN_OFFSET (0) #define paddr_to_pfn(X, page_shift) \ (((unsigned long long)(X) >> (page_shift)) - ARCH_PFN_OFFSET) #define pfn_to_paddr(X, page_shift) \ (((unsigned long long)(X) + ARCH_PFN_OFFSET) << (page_shift)) /* * 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 PHYS_BASE (0) #define DUMP_LEVEL (1) #define DISKDUMP_HEADER_BLOCKS (1) #define BUFSIZE_BITMAP (TARGET_PAGE_SIZE) #define PFN_BUFBITMAP (CHAR_BIT * BUFSIZE_BITMAP) #define BUFSIZE_DATA_CACHE (TARGET_PAGE_SIZE * 4) typedef struct ArchDumpInfo { int d_machine; /* Architecture */ int d_endian; /* ELFDATA2LSB or ELFDATA2MSB */ int d_class; /* ELFCLASS32 or ELFCLASS64 */ } ArchDumpInfo; 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 { int fd; /* fd of the file where to write the cached 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; struct GuestPhysBlockList; /* memory_mapping.h */ int cpu_get_dump_info(ArchDumpInfo *info, const struct GuestPhysBlockList *guest_phys_blocks); ssize_t cpu_get_note_size(int class, int machine, int nr_cpus); #endif