include/sysemu/dump.h

   1 /*
   2  * QEMU dump
   3  *
   4  * Copyright Fujitsu, Corp. 2011, 2012
   5  *
   6  * Authors:
   7  *     Wen Congyang <wency@cn.fujitsu.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef DUMP_H
  15 #define DUMP_H
  16
  17 #define MAKEDUMPFILE_SIGNATURE      "makedumpfile"
  18 #define MAX_SIZE_MDF_HEADER         (4096) /* max size of makedumpfile_header */
  19 #define TYPE_FLAT_HEADER            (1)    /* type of flattened format */
  20 #define VERSION_FLAT_HEADER         (1)    /* version of flattened format */
  21 #define END_FLAG_FLAT_HEADER        (-1)
  22
  23 #ifndef ARCH_PFN_OFFSET
  24 #define ARCH_PFN_OFFSET             (0)
  25 #endif
  26
  27 /*
  28  * flag for compressed format
  29  */
  30 #define DUMP_DH_COMPRESSED_ZLIB     (0x1)
  31 #define DUMP_DH_COMPRESSED_LZO      (0x2)
  32 #define DUMP_DH_COMPRESSED_SNAPPY   (0x4)
  33
  34 #define KDUMP_SIGNATURE             "KDUMP   "
  35 #define SIG_LEN                     (sizeof(KDUMP_SIGNATURE) - 1)
  36 #define DUMP_LEVEL                  (1)
  37 #define DISKDUMP_HEADER_BLOCKS      (1)
  38
  39 #include "sysemu/dump-arch.h"
  40 #include "sysemu/memory_mapping.h"
  41
  42 typedef struct QEMU_PACKED MakedumpfileHeader {
  43     char signature[16];     /* = "makedumpfile" */
  44     int64_t type;
  45     int64_t version;
  46 } MakedumpfileHeader;
  47
  48 typedef struct QEMU_PACKED MakedumpfileDataHeader {
  49     int64_t offset;
  50     int64_t buf_size;
  51 } MakedumpfileDataHeader;
  52
  53 typedef struct QEMU_PACKED NewUtsname {
  54     char sysname[65];
  55     char nodename[65];
  56     char release[65];
  57     char version[65];
  58     char machine[65];
  59     char domainname[65];
  60 } NewUtsname;
  61
  62 typedef struct QEMU_PACKED DiskDumpHeader32 {
  63     char signature[SIG_LEN];        /* = "KDUMP   " */
  64     uint32_t header_version;        /* Dump header version */
  65     NewUtsname utsname;             /* copy of system_utsname */
  66     char timestamp[10];             /* Time stamp */
  67     uint32_t status;                /* Above flags */
  68     uint32_t block_size;            /* Size of a block in byte */
  69     uint32_t sub_hdr_size;          /* Size of arch dependent header in block */
  70     uint32_t bitmap_blocks;         /* Size of Memory bitmap in block */
  71     uint32_t max_mapnr;             /* = max_mapnr ,
  72                                        obsoleted in header_version 6 */
  73     uint32_t total_ram_blocks;      /* Number of blocks should be written */
  74     uint32_t device_blocks;         /* Number of total blocks in dump device */
  75     uint32_t written_blocks;        /* Number of written blocks */
  76     uint32_t current_cpu;           /* CPU# which handles dump */
  77     uint32_t nr_cpus;               /* Number of CPUs */
  78 } DiskDumpHeader32;
  79
  80 typedef struct QEMU_PACKED DiskDumpHeader64 {
  81     char signature[SIG_LEN];        /* = "KDUMP   " */
  82     uint32_t header_version;        /* Dump header version */
  83     NewUtsname utsname;             /* copy of system_utsname */
  84     char timestamp[22];             /* Time stamp */
  85     uint32_t status;                /* Above flags */
  86     uint32_t block_size;            /* Size of a block in byte */
  87     uint32_t sub_hdr_size;          /* Size of arch dependent header in block */
  88     uint32_t bitmap_blocks;         /* Size of Memory bitmap in block */
  89     uint32_t max_mapnr;             /* = max_mapnr,
  90                                        obsoleted in header_version 6 */
  91     uint32_t total_ram_blocks;      /* Number of blocks should be written */
  92     uint32_t device_blocks;         /* Number of total blocks in dump device */
  93     uint32_t written_blocks;        /* Number of written blocks */
  94     uint32_t current_cpu;           /* CPU# which handles dump */
  95     uint32_t nr_cpus;               /* Number of CPUs */
  96 } DiskDumpHeader64;
  97
  98 typedef struct QEMU_PACKED KdumpSubHeader32 {
  99     uint32_t phys_base;
 100     uint32_t dump_level;            /* header_version 1 and later */
 101     uint32_t split;                 /* header_version 2 and later */
 102     uint32_t start_pfn;             /* header_version 2 and later,
 103                                        obsoleted in header_version 6 */
 104     uint32_t end_pfn;               /* header_version 2 and later,
 105                                        obsoleted in header_version 6 */
 106     uint64_t offset_vmcoreinfo;     /* header_version 3 and later */
 107     uint32_t size_vmcoreinfo;       /* header_version 3 and later */
 108     uint64_t offset_note;           /* header_version 4 and later */
 109     uint32_t note_size;             /* header_version 4 and later */
 110     uint64_t offset_eraseinfo;      /* header_version 5 and later */
 111     uint32_t size_eraseinfo;        /* header_version 5 and later */
 112     uint64_t start_pfn_64;          /* header_version 6 and later */
 113     uint64_t end_pfn_64;            /* header_version 6 and later */
 114     uint64_t max_mapnr_64;          /* header_version 6 and later */
 115 } KdumpSubHeader32;
 116
 117 typedef struct QEMU_PACKED KdumpSubHeader64 {
 118     uint64_t phys_base;
 119     uint32_t dump_level;            /* header_version 1 and later */
 120     uint32_t split;                 /* header_version 2 and later */
 121     uint64_t start_pfn;             /* header_version 2 and later,
 122                                        obsoleted in header_version 6 */
 123     uint64_t end_pfn;               /* header_version 2 and later,
 124                                        obsoleted in header_version 6 */
 125     uint64_t offset_vmcoreinfo;     /* header_version 3 and later */
 126     uint64_t size_vmcoreinfo;       /* header_version 3 and later */
 127     uint64_t offset_note;           /* header_version 4 and later */
 128     uint64_t note_size;             /* header_version 4 and later */
 129     uint64_t offset_eraseinfo;      /* header_version 5 and later */
 130     uint64_t size_eraseinfo;        /* header_version 5 and later */
 131     uint64_t start_pfn_64;          /* header_version 6 and later */
 132     uint64_t end_pfn_64;            /* header_version 6 and later */
 133     uint64_t max_mapnr_64;          /* header_version 6 and later */
 134 } KdumpSubHeader64;
 135
 136 typedef struct DataCache {
 137     int fd;             /* fd of the file where to write the cached data */
 138     uint8_t *buf;       /* buffer for cached data */
 139     size_t buf_size;    /* size of the buf */
 140     size_t data_size;   /* size of cached data in buf */
 141     off_t offset;       /* offset of the file */
 142 } DataCache;
 143
 144 typedef struct QEMU_PACKED PageDescriptor {
 145     uint64_t offset;                /* the offset of the page data*/
 146     uint32_t size;                  /* the size of this dump page */
 147     uint32_t flags;                 /* flags */
 148     uint64_t page_flags;            /* page flags */
 149 } PageDescriptor;
 150
 151 typedef struct DumpState {
 152     GuestPhysBlockList guest_phys_blocks;
 153     ArchDumpInfo dump_info;
 154     MemoryMappingList list;
 155     uint16_t phdr_num;
 156     uint32_t sh_info;
 157     bool have_section;
 158     bool resume;
 159     ssize_t note_size;
 160     hwaddr memory_offset;
 161     int fd;
 162
 163     GuestPhysBlock *next_block;
 164     ram_addr_t start;
 165     bool has_filter;
 166     int64_t begin;
 167     int64_t length;
 168
 169     uint8_t *note_buf;          /* buffer for notes */
 170     size_t note_buf_offset;     /* the writing place in note_buf */
 171     uint32_t nr_cpus;           /* number of guest's cpu */
 172     uint64_t max_mapnr;         /* the biggest guest's phys-mem's number */
 173     size_t len_dump_bitmap;     /* the size of the place used to store
 174                                    dump_bitmap in vmcore */
 175     off_t offset_dump_bitmap;   /* offset of dump_bitmap part in vmcore */
 176     off_t offset_page;          /* offset of page part in vmcore */
 177     size_t num_dumpable;        /* number of page that can be dumped */
 178     uint32_t flag_compress;     /* indicate the compression format */
 179 } DumpState;
 180
 181 uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
 182 uint32_t cpu_to_dump32(DumpState *s, uint32_t val);
 183 uint64_t cpu_to_dump64(DumpState *s, uint64_t val);
 184 #endif