Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1 | /* |
| 2 | * QEMU dump |
| 3 | * |
| 4 | * Copyright Fujitsu, Corp. 2011, 2012 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Wen Congyang <wency@cn.fujitsu.com> |
| 8 | * |
Stefan Weil | 352666e | 2012-06-10 19:34:04 +0000 | [diff] [blame] | 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. |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include "qemu-common.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 15 | #include "elf.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 16 | #include "cpu.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 17 | #include "exec/cpu-all.h" |
| 18 | #include "exec/hwaddr.h" |
Paolo Bonzini | 83c9089 | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 19 | #include "monitor/monitor.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 20 | #include "sysemu/kvm.h" |
| 21 | #include "sysemu/dump.h" |
| 22 | #include "sysemu/sysemu.h" |
| 23 | #include "sysemu/memory_mapping.h" |
Andreas Färber | 1b3509c | 2013-06-09 16:48:29 +0200 | [diff] [blame] | 24 | #include "sysemu/cpus.h" |
Paolo Bonzini | 7b1b5d1 | 2012-12-17 18:19:43 +0100 | [diff] [blame] | 25 | #include "qapi/error.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 26 | #include "qmp-commands.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 27 | |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 28 | #include <zlib.h> |
| 29 | #ifdef CONFIG_LZO |
| 30 | #include <lzo/lzo1x.h> |
| 31 | #endif |
| 32 | #ifdef CONFIG_SNAPPY |
| 33 | #include <snappy-c.h> |
| 34 | #endif |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 35 | #ifndef ELF_MACHINE_UNAME |
| 36 | #define ELF_MACHINE_UNAME "Unknown" |
| 37 | #endif |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 38 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 39 | static uint16_t cpu_convert_to_target16(uint16_t val, int endian) |
| 40 | { |
| 41 | if (endian == ELFDATA2LSB) { |
| 42 | val = cpu_to_le16(val); |
| 43 | } else { |
| 44 | val = cpu_to_be16(val); |
| 45 | } |
| 46 | |
| 47 | return val; |
| 48 | } |
| 49 | |
| 50 | static uint32_t cpu_convert_to_target32(uint32_t val, int endian) |
| 51 | { |
| 52 | if (endian == ELFDATA2LSB) { |
| 53 | val = cpu_to_le32(val); |
| 54 | } else { |
| 55 | val = cpu_to_be32(val); |
| 56 | } |
| 57 | |
| 58 | return val; |
| 59 | } |
| 60 | |
| 61 | static uint64_t cpu_convert_to_target64(uint64_t val, int endian) |
| 62 | { |
| 63 | if (endian == ELFDATA2LSB) { |
| 64 | val = cpu_to_le64(val); |
| 65 | } else { |
| 66 | val = cpu_to_be64(val); |
| 67 | } |
| 68 | |
| 69 | return val; |
| 70 | } |
| 71 | |
| 72 | typedef struct DumpState { |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 73 | GuestPhysBlockList guest_phys_blocks; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 74 | ArchDumpInfo dump_info; |
| 75 | MemoryMappingList list; |
| 76 | uint16_t phdr_num; |
| 77 | uint32_t sh_info; |
| 78 | bool have_section; |
| 79 | bool resume; |
Aneesh Kumar K.V | bb6b684 | 2013-10-01 21:49:32 +0530 | [diff] [blame] | 80 | ssize_t note_size; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 81 | hwaddr memory_offset; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 82 | int fd; |
| 83 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 84 | GuestPhysBlock *next_block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 85 | ram_addr_t start; |
| 86 | bool has_filter; |
| 87 | int64_t begin; |
| 88 | int64_t length; |
qiaonuohan | 4835ef7 | 2014-02-18 14:11:29 +0800 | [diff] [blame] | 89 | |
| 90 | uint8_t *note_buf; /* buffer for notes */ |
| 91 | size_t note_buf_offset; /* the writing place in note_buf */ |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 92 | uint32_t nr_cpus; /* number of guest's cpu */ |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 93 | uint64_t max_mapnr; /* the biggest guest's phys-mem's number */ |
| 94 | size_t len_dump_bitmap; /* the size of the place used to store |
| 95 | dump_bitmap in vmcore */ |
| 96 | off_t offset_dump_bitmap; /* offset of dump_bitmap part in vmcore */ |
| 97 | off_t offset_page; /* offset of page part in vmcore */ |
| 98 | size_t num_dumpable; /* number of page that can be dumped */ |
| 99 | uint32_t flag_compress; /* indicate the compression format */ |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 100 | } DumpState; |
| 101 | |
| 102 | static int dump_cleanup(DumpState *s) |
| 103 | { |
| 104 | int ret = 0; |
| 105 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 106 | guest_phys_blocks_free(&s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 107 | memory_mapping_list_free(&s->list); |
| 108 | if (s->fd != -1) { |
| 109 | close(s->fd); |
| 110 | } |
| 111 | if (s->resume) { |
| 112 | vm_start(); |
| 113 | } |
| 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | |
| 118 | static void dump_error(DumpState *s, const char *reason) |
| 119 | { |
| 120 | dump_cleanup(s); |
| 121 | } |
| 122 | |
qiaonuohan | b5ba1cc | 2014-02-18 14:11:25 +0800 | [diff] [blame] | 123 | static int fd_write_vmcore(const void *buf, size_t size, void *opaque) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 124 | { |
| 125 | DumpState *s = opaque; |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 126 | size_t written_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 127 | |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 128 | written_size = qemu_write_full(s->fd, buf, size); |
| 129 | if (written_size != size) { |
| 130 | return -1; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | static int write_elf64_header(DumpState *s) |
| 137 | { |
| 138 | Elf64_Ehdr elf_header; |
| 139 | int ret; |
| 140 | int endian = s->dump_info.d_endian; |
| 141 | |
| 142 | memset(&elf_header, 0, sizeof(Elf64_Ehdr)); |
| 143 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 144 | elf_header.e_ident[EI_CLASS] = ELFCLASS64; |
| 145 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
| 146 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
| 147 | elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
| 148 | elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
| 149 | endian); |
| 150 | elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
| 151 | elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); |
| 152 | elf_header.e_phoff = cpu_convert_to_target64(sizeof(Elf64_Ehdr), endian); |
| 153 | elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf64_Phdr), |
| 154 | endian); |
| 155 | elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
| 156 | if (s->have_section) { |
| 157 | uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; |
| 158 | |
| 159 | elf_header.e_shoff = cpu_convert_to_target64(shoff, endian); |
| 160 | elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf64_Shdr), |
| 161 | endian); |
| 162 | elf_header.e_shnum = cpu_convert_to_target16(1, endian); |
| 163 | } |
| 164 | |
| 165 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 166 | if (ret < 0) { |
| 167 | dump_error(s, "dump: failed to write elf header.\n"); |
| 168 | return -1; |
| 169 | } |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int write_elf32_header(DumpState *s) |
| 175 | { |
| 176 | Elf32_Ehdr elf_header; |
| 177 | int ret; |
| 178 | int endian = s->dump_info.d_endian; |
| 179 | |
| 180 | memset(&elf_header, 0, sizeof(Elf32_Ehdr)); |
| 181 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 182 | elf_header.e_ident[EI_CLASS] = ELFCLASS32; |
| 183 | elf_header.e_ident[EI_DATA] = endian; |
| 184 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
| 185 | elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
| 186 | elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
| 187 | endian); |
| 188 | elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
| 189 | elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); |
| 190 | elf_header.e_phoff = cpu_convert_to_target32(sizeof(Elf32_Ehdr), endian); |
| 191 | elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf32_Phdr), |
| 192 | endian); |
| 193 | elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
| 194 | if (s->have_section) { |
| 195 | uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; |
| 196 | |
| 197 | elf_header.e_shoff = cpu_convert_to_target32(shoff, endian); |
| 198 | elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf32_Shdr), |
| 199 | endian); |
| 200 | elf_header.e_shnum = cpu_convert_to_target16(1, endian); |
| 201 | } |
| 202 | |
| 203 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 204 | if (ret < 0) { |
| 205 | dump_error(s, "dump: failed to write elf header.\n"); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 213 | int phdr_index, hwaddr offset, |
| 214 | hwaddr filesz) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 215 | { |
| 216 | Elf64_Phdr phdr; |
| 217 | int ret; |
| 218 | int endian = s->dump_info.d_endian; |
| 219 | |
| 220 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
| 221 | phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
| 222 | phdr.p_offset = cpu_convert_to_target64(offset, endian); |
| 223 | phdr.p_paddr = cpu_convert_to_target64(memory_mapping->phys_addr, endian); |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 224 | phdr.p_filesz = cpu_convert_to_target64(filesz, endian); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 225 | phdr.p_memsz = cpu_convert_to_target64(memory_mapping->length, endian); |
| 226 | phdr.p_vaddr = cpu_convert_to_target64(memory_mapping->virt_addr, endian); |
| 227 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 228 | assert(memory_mapping->length >= filesz); |
| 229 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 230 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 231 | if (ret < 0) { |
| 232 | dump_error(s, "dump: failed to write program header table.\n"); |
| 233 | return -1; |
| 234 | } |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 240 | int phdr_index, hwaddr offset, |
| 241 | hwaddr filesz) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 242 | { |
| 243 | Elf32_Phdr phdr; |
| 244 | int ret; |
| 245 | int endian = s->dump_info.d_endian; |
| 246 | |
| 247 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
| 248 | phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
| 249 | phdr.p_offset = cpu_convert_to_target32(offset, endian); |
| 250 | phdr.p_paddr = cpu_convert_to_target32(memory_mapping->phys_addr, endian); |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 251 | phdr.p_filesz = cpu_convert_to_target32(filesz, endian); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 252 | phdr.p_memsz = cpu_convert_to_target32(memory_mapping->length, endian); |
| 253 | phdr.p_vaddr = cpu_convert_to_target32(memory_mapping->virt_addr, endian); |
| 254 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 255 | assert(memory_mapping->length >= filesz); |
| 256 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 257 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 258 | if (ret < 0) { |
| 259 | dump_error(s, "dump: failed to write program header table.\n"); |
| 260 | return -1; |
| 261 | } |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static int write_elf64_note(DumpState *s) |
| 267 | { |
| 268 | Elf64_Phdr phdr; |
| 269 | int endian = s->dump_info.d_endian; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 270 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 271 | int ret; |
| 272 | |
| 273 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
| 274 | phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
| 275 | phdr.p_offset = cpu_convert_to_target64(begin, endian); |
| 276 | phdr.p_paddr = 0; |
| 277 | phdr.p_filesz = cpu_convert_to_target64(s->note_size, endian); |
| 278 | phdr.p_memsz = cpu_convert_to_target64(s->note_size, endian); |
| 279 | phdr.p_vaddr = 0; |
| 280 | |
| 281 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 282 | if (ret < 0) { |
| 283 | dump_error(s, "dump: failed to write program header table.\n"); |
| 284 | return -1; |
| 285 | } |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |
Paolo Bonzini | 0bc3cd6 | 2013-04-08 17:29:59 +0200 | [diff] [blame] | 290 | static inline int cpu_index(CPUState *cpu) |
| 291 | { |
| 292 | return cpu->cpu_index + 1; |
| 293 | } |
| 294 | |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 295 | static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 296 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 297 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 298 | int ret; |
| 299 | int id; |
| 300 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 301 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 302 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 303 | ret = cpu_write_elf64_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 304 | if (ret < 0) { |
| 305 | dump_error(s, "dump: failed to write elf notes.\n"); |
| 306 | return -1; |
| 307 | } |
| 308 | } |
| 309 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 310 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 311 | ret = cpu_write_elf64_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 312 | if (ret < 0) { |
| 313 | dump_error(s, "dump: failed to write CPU status.\n"); |
| 314 | return -1; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | static int write_elf32_note(DumpState *s) |
| 322 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 323 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 324 | Elf32_Phdr phdr; |
| 325 | int endian = s->dump_info.d_endian; |
| 326 | int ret; |
| 327 | |
| 328 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
| 329 | phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
| 330 | phdr.p_offset = cpu_convert_to_target32(begin, endian); |
| 331 | phdr.p_paddr = 0; |
| 332 | phdr.p_filesz = cpu_convert_to_target32(s->note_size, endian); |
| 333 | phdr.p_memsz = cpu_convert_to_target32(s->note_size, endian); |
| 334 | phdr.p_vaddr = 0; |
| 335 | |
| 336 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 337 | if (ret < 0) { |
| 338 | dump_error(s, "dump: failed to write program header table.\n"); |
| 339 | return -1; |
| 340 | } |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 345 | static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 346 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 347 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 348 | int ret; |
| 349 | int id; |
| 350 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 351 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 352 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 353 | ret = cpu_write_elf32_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 354 | if (ret < 0) { |
| 355 | dump_error(s, "dump: failed to write elf notes.\n"); |
| 356 | return -1; |
| 357 | } |
| 358 | } |
| 359 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 360 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 361 | ret = cpu_write_elf32_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 362 | if (ret < 0) { |
| 363 | dump_error(s, "dump: failed to write CPU status.\n"); |
| 364 | return -1; |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | static int write_elf_section(DumpState *s, int type) |
| 372 | { |
| 373 | Elf32_Shdr shdr32; |
| 374 | Elf64_Shdr shdr64; |
| 375 | int endian = s->dump_info.d_endian; |
| 376 | int shdr_size; |
| 377 | void *shdr; |
| 378 | int ret; |
| 379 | |
| 380 | if (type == 0) { |
| 381 | shdr_size = sizeof(Elf32_Shdr); |
| 382 | memset(&shdr32, 0, shdr_size); |
| 383 | shdr32.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 384 | shdr = &shdr32; |
| 385 | } else { |
| 386 | shdr_size = sizeof(Elf64_Shdr); |
| 387 | memset(&shdr64, 0, shdr_size); |
| 388 | shdr64.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 389 | shdr = &shdr64; |
| 390 | } |
| 391 | |
| 392 | ret = fd_write_vmcore(&shdr, shdr_size, s); |
| 393 | if (ret < 0) { |
| 394 | dump_error(s, "dump: failed to write section header table.\n"); |
| 395 | return -1; |
| 396 | } |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | static int write_data(DumpState *s, void *buf, int length) |
| 402 | { |
| 403 | int ret; |
| 404 | |
| 405 | ret = fd_write_vmcore(buf, length, s); |
| 406 | if (ret < 0) { |
| 407 | dump_error(s, "dump: failed to save memory.\n"); |
| 408 | return -1; |
| 409 | } |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | /* write the memroy to vmcore. 1 page per I/O. */ |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 415 | static int write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 416 | int64_t size) |
| 417 | { |
| 418 | int64_t i; |
| 419 | int ret; |
| 420 | |
| 421 | for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 422 | ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 423 | TARGET_PAGE_SIZE); |
| 424 | if (ret < 0) { |
| 425 | return ret; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | if ((size % TARGET_PAGE_SIZE) != 0) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 430 | ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 431 | size % TARGET_PAGE_SIZE); |
| 432 | if (ret < 0) { |
| 433 | return ret; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | return 0; |
| 438 | } |
| 439 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 440 | /* get the memory's offset and size in the vmcore */ |
| 441 | static void get_offset_range(hwaddr phys_addr, |
| 442 | ram_addr_t mapping_length, |
| 443 | DumpState *s, |
| 444 | hwaddr *p_offset, |
| 445 | hwaddr *p_filesz) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 446 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 447 | GuestPhysBlock *block; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 448 | hwaddr offset = s->memory_offset; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 449 | int64_t size_in_block, start; |
| 450 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 451 | /* When the memory is not stored into vmcore, offset will be -1 */ |
| 452 | *p_offset = -1; |
| 453 | *p_filesz = 0; |
| 454 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 455 | if (s->has_filter) { |
| 456 | if (phys_addr < s->begin || phys_addr >= s->begin + s->length) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 457 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 458 | } |
| 459 | } |
| 460 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 461 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 462 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 463 | if (block->target_start >= s->begin + s->length || |
| 464 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 465 | /* This block is out of the range */ |
| 466 | continue; |
| 467 | } |
| 468 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 469 | if (s->begin <= block->target_start) { |
| 470 | start = block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 471 | } else { |
| 472 | start = s->begin; |
| 473 | } |
| 474 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 475 | size_in_block = block->target_end - start; |
| 476 | if (s->begin + s->length < block->target_end) { |
| 477 | size_in_block -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 478 | } |
| 479 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 480 | start = block->target_start; |
| 481 | size_in_block = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | if (phys_addr >= start && phys_addr < start + size_in_block) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 485 | *p_offset = phys_addr - start + offset; |
| 486 | |
| 487 | /* The offset range mapped from the vmcore file must not spill over |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 488 | * the GuestPhysBlock, clamp it. The rest of the mapping will be |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 489 | * zero-filled in memory at load time; see |
| 490 | * <http://refspecs.linuxbase.org/elf/gabi4+/ch5.pheader.html>. |
| 491 | */ |
| 492 | *p_filesz = phys_addr + mapping_length <= start + size_in_block ? |
| 493 | mapping_length : |
| 494 | size_in_block - (phys_addr - start); |
| 495 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | offset += size_in_block; |
| 499 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | static int write_elf_loads(DumpState *s) |
| 503 | { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 504 | hwaddr offset, filesz; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 505 | MemoryMapping *memory_mapping; |
| 506 | uint32_t phdr_index = 1; |
| 507 | int ret; |
| 508 | uint32_t max_index; |
| 509 | |
| 510 | if (s->have_section) { |
| 511 | max_index = s->sh_info; |
| 512 | } else { |
| 513 | max_index = s->phdr_num; |
| 514 | } |
| 515 | |
| 516 | QTAILQ_FOREACH(memory_mapping, &s->list.head, next) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 517 | get_offset_range(memory_mapping->phys_addr, |
| 518 | memory_mapping->length, |
| 519 | s, &offset, &filesz); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 520 | if (s->dump_info.d_class == ELFCLASS64) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 521 | ret = write_elf64_load(s, memory_mapping, phdr_index++, offset, |
| 522 | filesz); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 523 | } else { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 524 | ret = write_elf32_load(s, memory_mapping, phdr_index++, offset, |
| 525 | filesz); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | if (ret < 0) { |
| 529 | return -1; |
| 530 | } |
| 531 | |
| 532 | if (phdr_index >= max_index) { |
| 533 | break; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | /* write elf header, PT_NOTE and elf note to vmcore. */ |
| 541 | static int dump_begin(DumpState *s) |
| 542 | { |
| 543 | int ret; |
| 544 | |
| 545 | /* |
| 546 | * the vmcore's format is: |
| 547 | * -------------- |
| 548 | * | elf header | |
| 549 | * -------------- |
| 550 | * | PT_NOTE | |
| 551 | * -------------- |
| 552 | * | PT_LOAD | |
| 553 | * -------------- |
| 554 | * | ...... | |
| 555 | * -------------- |
| 556 | * | PT_LOAD | |
| 557 | * -------------- |
| 558 | * | sec_hdr | |
| 559 | * -------------- |
| 560 | * | elf note | |
| 561 | * -------------- |
| 562 | * | memory | |
| 563 | * -------------- |
| 564 | * |
| 565 | * we only know where the memory is saved after we write elf note into |
| 566 | * vmcore. |
| 567 | */ |
| 568 | |
| 569 | /* write elf header to vmcore */ |
| 570 | if (s->dump_info.d_class == ELFCLASS64) { |
| 571 | ret = write_elf64_header(s); |
| 572 | } else { |
| 573 | ret = write_elf32_header(s); |
| 574 | } |
| 575 | if (ret < 0) { |
| 576 | return -1; |
| 577 | } |
| 578 | |
| 579 | if (s->dump_info.d_class == ELFCLASS64) { |
| 580 | /* write PT_NOTE to vmcore */ |
| 581 | if (write_elf64_note(s) < 0) { |
| 582 | return -1; |
| 583 | } |
| 584 | |
| 585 | /* write all PT_LOAD to vmcore */ |
| 586 | if (write_elf_loads(s) < 0) { |
| 587 | return -1; |
| 588 | } |
| 589 | |
| 590 | /* write section to vmcore */ |
| 591 | if (s->have_section) { |
| 592 | if (write_elf_section(s, 1) < 0) { |
| 593 | return -1; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | /* write notes to vmcore */ |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 598 | if (write_elf64_notes(fd_write_vmcore, s) < 0) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 599 | return -1; |
| 600 | } |
| 601 | |
| 602 | } else { |
| 603 | /* write PT_NOTE to vmcore */ |
| 604 | if (write_elf32_note(s) < 0) { |
| 605 | return -1; |
| 606 | } |
| 607 | |
| 608 | /* write all PT_LOAD to vmcore */ |
| 609 | if (write_elf_loads(s) < 0) { |
| 610 | return -1; |
| 611 | } |
| 612 | |
| 613 | /* write section to vmcore */ |
| 614 | if (s->have_section) { |
| 615 | if (write_elf_section(s, 0) < 0) { |
| 616 | return -1; |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /* write notes to vmcore */ |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 621 | if (write_elf32_notes(fd_write_vmcore, s) < 0) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 622 | return -1; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | /* write PT_LOAD to vmcore */ |
| 630 | static int dump_completed(DumpState *s) |
| 631 | { |
| 632 | dump_cleanup(s); |
| 633 | return 0; |
| 634 | } |
| 635 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 636 | static int get_next_block(DumpState *s, GuestPhysBlock *block) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 637 | { |
| 638 | while (1) { |
Paolo Bonzini | a316103 | 2012-11-14 15:54:48 +0100 | [diff] [blame] | 639 | block = QTAILQ_NEXT(block, next); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 640 | if (!block) { |
| 641 | /* no more block */ |
| 642 | return 1; |
| 643 | } |
| 644 | |
| 645 | s->start = 0; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 646 | s->next_block = block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 647 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 648 | if (block->target_start >= s->begin + s->length || |
| 649 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 650 | /* This block is out of the range */ |
| 651 | continue; |
| 652 | } |
| 653 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 654 | if (s->begin > block->target_start) { |
| 655 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 656 | } |
| 657 | } |
| 658 | |
| 659 | return 0; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | /* write all memory to vmcore */ |
| 664 | static int dump_iterate(DumpState *s) |
| 665 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 666 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 667 | int64_t size; |
| 668 | int ret; |
| 669 | |
| 670 | while (1) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 671 | block = s->next_block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 672 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 673 | size = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 674 | if (s->has_filter) { |
| 675 | size -= s->start; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 676 | if (s->begin + s->length < block->target_end) { |
| 677 | size -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | ret = write_memory(s, block, s->start, size); |
| 681 | if (ret == -1) { |
| 682 | return ret; |
| 683 | } |
| 684 | |
| 685 | ret = get_next_block(s, block); |
| 686 | if (ret == 1) { |
| 687 | dump_completed(s); |
| 688 | return 0; |
| 689 | } |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | static int create_vmcore(DumpState *s) |
| 694 | { |
| 695 | int ret; |
| 696 | |
| 697 | ret = dump_begin(s); |
| 698 | if (ret < 0) { |
| 699 | return -1; |
| 700 | } |
| 701 | |
| 702 | ret = dump_iterate(s); |
| 703 | if (ret < 0) { |
| 704 | return -1; |
| 705 | } |
| 706 | |
| 707 | return 0; |
| 708 | } |
| 709 | |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 710 | static int write_start_flat_header(int fd) |
| 711 | { |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 712 | MakedumpfileHeader *mh; |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 713 | int ret = 0; |
| 714 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 715 | QEMU_BUILD_BUG_ON(sizeof *mh > MAX_SIZE_MDF_HEADER); |
| 716 | mh = g_malloc0(MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 717 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 718 | memcpy(mh->signature, MAKEDUMPFILE_SIGNATURE, |
| 719 | MIN(sizeof mh->signature, sizeof MAKEDUMPFILE_SIGNATURE)); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 720 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 721 | mh->type = cpu_to_be64(TYPE_FLAT_HEADER); |
| 722 | mh->version = cpu_to_be64(VERSION_FLAT_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 723 | |
| 724 | size_t written_size; |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 725 | written_size = qemu_write_full(fd, mh, MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 726 | if (written_size != MAX_SIZE_MDF_HEADER) { |
| 727 | ret = -1; |
| 728 | } |
| 729 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 730 | g_free(mh); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 731 | return ret; |
| 732 | } |
| 733 | |
| 734 | static int write_end_flat_header(int fd) |
| 735 | { |
| 736 | MakedumpfileDataHeader mdh; |
| 737 | |
| 738 | mdh.offset = END_FLAG_FLAT_HEADER; |
| 739 | mdh.buf_size = END_FLAG_FLAT_HEADER; |
| 740 | |
| 741 | size_t written_size; |
| 742 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 743 | if (written_size != sizeof(mdh)) { |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | return 0; |
| 748 | } |
| 749 | |
qiaonuohan | 5d31bab | 2014-02-18 14:11:28 +0800 | [diff] [blame] | 750 | static int write_buffer(int fd, off_t offset, const void *buf, size_t size) |
| 751 | { |
| 752 | size_t written_size; |
| 753 | MakedumpfileDataHeader mdh; |
| 754 | |
| 755 | mdh.offset = cpu_to_be64(offset); |
| 756 | mdh.buf_size = cpu_to_be64(size); |
| 757 | |
| 758 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 759 | if (written_size != sizeof(mdh)) { |
| 760 | return -1; |
| 761 | } |
| 762 | |
| 763 | written_size = qemu_write_full(fd, buf, size); |
| 764 | if (written_size != size) { |
| 765 | return -1; |
| 766 | } |
| 767 | |
| 768 | return 0; |
| 769 | } |
| 770 | |
qiaonuohan | 4835ef7 | 2014-02-18 14:11:29 +0800 | [diff] [blame] | 771 | static int buf_write_note(const void *buf, size_t size, void *opaque) |
| 772 | { |
| 773 | DumpState *s = opaque; |
| 774 | |
| 775 | /* note_buf is not enough */ |
| 776 | if (s->note_buf_offset + size > s->note_size) { |
| 777 | return -1; |
| 778 | } |
| 779 | |
| 780 | memcpy(s->note_buf + s->note_buf_offset, buf, size); |
| 781 | |
| 782 | s->note_buf_offset += size; |
| 783 | |
| 784 | return 0; |
| 785 | } |
| 786 | |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 787 | /* write common header, sub header and elf note to vmcore */ |
| 788 | static int create_header32(DumpState *s) |
| 789 | { |
| 790 | int ret = 0; |
| 791 | DiskDumpHeader32 *dh = NULL; |
| 792 | KdumpSubHeader32 *kh = NULL; |
| 793 | size_t size; |
| 794 | int endian = s->dump_info.d_endian; |
| 795 | uint32_t block_size; |
| 796 | uint32_t sub_hdr_size; |
| 797 | uint32_t bitmap_blocks; |
| 798 | uint32_t status = 0; |
| 799 | uint64_t offset_note; |
| 800 | |
| 801 | /* write common header, the version of kdump-compressed format is 6th */ |
| 802 | size = sizeof(DiskDumpHeader32); |
| 803 | dh = g_malloc0(size); |
| 804 | |
| 805 | strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); |
| 806 | dh->header_version = cpu_convert_to_target32(6, endian); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 807 | block_size = TARGET_PAGE_SIZE; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 808 | dh->block_size = cpu_convert_to_target32(block_size, endian); |
| 809 | sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size; |
| 810 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
| 811 | dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian); |
| 812 | /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ |
| 813 | dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX), |
| 814 | endian); |
| 815 | dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian); |
| 816 | bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; |
| 817 | dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 818 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 819 | |
| 820 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 821 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 822 | } |
| 823 | #ifdef CONFIG_LZO |
| 824 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 825 | status |= DUMP_DH_COMPRESSED_LZO; |
| 826 | } |
| 827 | #endif |
| 828 | #ifdef CONFIG_SNAPPY |
| 829 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 830 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 831 | } |
| 832 | #endif |
| 833 | dh->status = cpu_convert_to_target32(status, endian); |
| 834 | |
| 835 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
| 836 | dump_error(s, "dump: failed to write disk dump header.\n"); |
| 837 | ret = -1; |
| 838 | goto out; |
| 839 | } |
| 840 | |
| 841 | /* write sub header */ |
| 842 | size = sizeof(KdumpSubHeader32); |
| 843 | kh = g_malloc0(size); |
| 844 | |
| 845 | /* 64bit max_mapnr_64 */ |
| 846 | kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian); |
| 847 | kh->phys_base = cpu_convert_to_target32(PHYS_BASE, endian); |
| 848 | kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian); |
| 849 | |
| 850 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
| 851 | kh->offset_note = cpu_convert_to_target64(offset_note, endian); |
| 852 | kh->note_size = cpu_convert_to_target32(s->note_size, endian); |
| 853 | |
| 854 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 855 | block_size, kh, size) < 0) { |
| 856 | dump_error(s, "dump: failed to write kdump sub header.\n"); |
| 857 | ret = -1; |
| 858 | goto out; |
| 859 | } |
| 860 | |
| 861 | /* write note */ |
| 862 | s->note_buf = g_malloc0(s->note_size); |
| 863 | s->note_buf_offset = 0; |
| 864 | |
| 865 | /* use s->note_buf to store notes temporarily */ |
| 866 | if (write_elf32_notes(buf_write_note, s) < 0) { |
| 867 | ret = -1; |
| 868 | goto out; |
| 869 | } |
| 870 | |
| 871 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 872 | s->note_size) < 0) { |
| 873 | dump_error(s, "dump: failed to write notes"); |
| 874 | ret = -1; |
| 875 | goto out; |
| 876 | } |
| 877 | |
| 878 | /* get offset of dump_bitmap */ |
| 879 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 880 | block_size; |
| 881 | |
| 882 | /* get offset of page */ |
| 883 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 884 | block_size; |
| 885 | |
| 886 | out: |
| 887 | g_free(dh); |
| 888 | g_free(kh); |
| 889 | g_free(s->note_buf); |
| 890 | |
| 891 | return ret; |
| 892 | } |
| 893 | |
| 894 | /* write common header, sub header and elf note to vmcore */ |
| 895 | static int create_header64(DumpState *s) |
| 896 | { |
| 897 | int ret = 0; |
| 898 | DiskDumpHeader64 *dh = NULL; |
| 899 | KdumpSubHeader64 *kh = NULL; |
| 900 | size_t size; |
| 901 | int endian = s->dump_info.d_endian; |
| 902 | uint32_t block_size; |
| 903 | uint32_t sub_hdr_size; |
| 904 | uint32_t bitmap_blocks; |
| 905 | uint32_t status = 0; |
| 906 | uint64_t offset_note; |
| 907 | |
| 908 | /* write common header, the version of kdump-compressed format is 6th */ |
| 909 | size = sizeof(DiskDumpHeader64); |
| 910 | dh = g_malloc0(size); |
| 911 | |
| 912 | strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); |
| 913 | dh->header_version = cpu_convert_to_target32(6, endian); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 914 | block_size = TARGET_PAGE_SIZE; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 915 | dh->block_size = cpu_convert_to_target32(block_size, endian); |
| 916 | sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size; |
| 917 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
| 918 | dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian); |
| 919 | /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ |
| 920 | dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX), |
| 921 | endian); |
| 922 | dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian); |
| 923 | bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; |
| 924 | dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 925 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 926 | |
| 927 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 928 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 929 | } |
| 930 | #ifdef CONFIG_LZO |
| 931 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 932 | status |= DUMP_DH_COMPRESSED_LZO; |
| 933 | } |
| 934 | #endif |
| 935 | #ifdef CONFIG_SNAPPY |
| 936 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 937 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 938 | } |
| 939 | #endif |
| 940 | dh->status = cpu_convert_to_target32(status, endian); |
| 941 | |
| 942 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
| 943 | dump_error(s, "dump: failed to write disk dump header.\n"); |
| 944 | ret = -1; |
| 945 | goto out; |
| 946 | } |
| 947 | |
| 948 | /* write sub header */ |
| 949 | size = sizeof(KdumpSubHeader64); |
| 950 | kh = g_malloc0(size); |
| 951 | |
| 952 | /* 64bit max_mapnr_64 */ |
| 953 | kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian); |
| 954 | kh->phys_base = cpu_convert_to_target64(PHYS_BASE, endian); |
| 955 | kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian); |
| 956 | |
| 957 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
| 958 | kh->offset_note = cpu_convert_to_target64(offset_note, endian); |
| 959 | kh->note_size = cpu_convert_to_target64(s->note_size, endian); |
| 960 | |
| 961 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 962 | block_size, kh, size) < 0) { |
| 963 | dump_error(s, "dump: failed to write kdump sub header.\n"); |
| 964 | ret = -1; |
| 965 | goto out; |
| 966 | } |
| 967 | |
| 968 | /* write note */ |
| 969 | s->note_buf = g_malloc0(s->note_size); |
| 970 | s->note_buf_offset = 0; |
| 971 | |
| 972 | /* use s->note_buf to store notes temporarily */ |
| 973 | if (write_elf64_notes(buf_write_note, s) < 0) { |
| 974 | ret = -1; |
| 975 | goto out; |
| 976 | } |
| 977 | |
| 978 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 979 | s->note_size) < 0) { |
| 980 | dump_error(s, "dump: failed to write notes"); |
| 981 | ret = -1; |
| 982 | goto out; |
| 983 | } |
| 984 | |
| 985 | /* get offset of dump_bitmap */ |
| 986 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 987 | block_size; |
| 988 | |
| 989 | /* get offset of page */ |
| 990 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 991 | block_size; |
| 992 | |
| 993 | out: |
| 994 | g_free(dh); |
| 995 | g_free(kh); |
| 996 | g_free(s->note_buf); |
| 997 | |
| 998 | return ret; |
| 999 | } |
| 1000 | |
| 1001 | static int write_dump_header(DumpState *s) |
| 1002 | { |
Laszlo Ersek | 24aeeac | 2014-05-20 13:39:45 +0200 | [diff] [blame] | 1003 | if (s->dump_info.d_class == ELFCLASS32) { |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1004 | return create_header32(s); |
| 1005 | } else { |
| 1006 | return create_header64(s); |
| 1007 | } |
| 1008 | } |
| 1009 | |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1010 | /* |
| 1011 | * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be |
| 1012 | * rewritten, so if need to set the first bit, set last_pfn and pfn to 0. |
| 1013 | * set_dump_bitmap will always leave the recently set bit un-sync. And setting |
| 1014 | * (last bit + sizeof(buf) * 8) to 0 will do flushing the content in buf into |
| 1015 | * vmcore, ie. synchronizing un-sync bit into vmcore. |
| 1016 | */ |
| 1017 | static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, |
| 1018 | uint8_t *buf, DumpState *s) |
| 1019 | { |
| 1020 | off_t old_offset, new_offset; |
| 1021 | off_t offset_bitmap1, offset_bitmap2; |
| 1022 | uint32_t byte, bit; |
| 1023 | |
| 1024 | /* should not set the previous place */ |
| 1025 | assert(last_pfn <= pfn); |
| 1026 | |
| 1027 | /* |
| 1028 | * if the bit needed to be set is not cached in buf, flush the data in buf |
| 1029 | * to vmcore firstly. |
| 1030 | * making new_offset be bigger than old_offset can also sync remained data |
| 1031 | * into vmcore. |
| 1032 | */ |
| 1033 | old_offset = BUFSIZE_BITMAP * (last_pfn / PFN_BUFBITMAP); |
| 1034 | new_offset = BUFSIZE_BITMAP * (pfn / PFN_BUFBITMAP); |
| 1035 | |
| 1036 | while (old_offset < new_offset) { |
| 1037 | /* calculate the offset and write dump_bitmap */ |
| 1038 | offset_bitmap1 = s->offset_dump_bitmap + old_offset; |
| 1039 | if (write_buffer(s->fd, offset_bitmap1, buf, |
| 1040 | BUFSIZE_BITMAP) < 0) { |
| 1041 | return -1; |
| 1042 | } |
| 1043 | |
| 1044 | /* dump level 1 is chosen, so 1st and 2nd bitmap are same */ |
| 1045 | offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap + |
| 1046 | old_offset; |
| 1047 | if (write_buffer(s->fd, offset_bitmap2, buf, |
| 1048 | BUFSIZE_BITMAP) < 0) { |
| 1049 | return -1; |
| 1050 | } |
| 1051 | |
| 1052 | memset(buf, 0, BUFSIZE_BITMAP); |
| 1053 | old_offset += BUFSIZE_BITMAP; |
| 1054 | } |
| 1055 | |
| 1056 | /* get the exact place of the bit in the buf, and set it */ |
| 1057 | byte = (pfn % PFN_BUFBITMAP) / CHAR_BIT; |
| 1058 | bit = (pfn % PFN_BUFBITMAP) % CHAR_BIT; |
| 1059 | if (value) { |
| 1060 | buf[byte] |= 1u << bit; |
| 1061 | } else { |
| 1062 | buf[byte] &= ~(1u << bit); |
| 1063 | } |
| 1064 | |
| 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | /* |
| 1069 | * exam every page and return the page frame number and the address of the page. |
| 1070 | * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys |
| 1071 | * blocks, so block->target_start and block->target_end should be interal |
| 1072 | * multiples of the target page size. |
| 1073 | */ |
| 1074 | static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, |
| 1075 | uint8_t **bufptr, DumpState *s) |
| 1076 | { |
| 1077 | GuestPhysBlock *block = *blockptr; |
| 1078 | hwaddr addr; |
| 1079 | uint8_t *buf; |
| 1080 | |
| 1081 | /* block == NULL means the start of the iteration */ |
| 1082 | if (!block) { |
| 1083 | block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
| 1084 | *blockptr = block; |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1085 | assert((block->target_start & ~TARGET_PAGE_MASK) == 0); |
| 1086 | assert((block->target_end & ~TARGET_PAGE_MASK) == 0); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1087 | *pfnptr = paddr_to_pfn(block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1088 | if (bufptr) { |
| 1089 | *bufptr = block->host_addr; |
| 1090 | } |
| 1091 | return true; |
| 1092 | } |
| 1093 | |
| 1094 | *pfnptr = *pfnptr + 1; |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1095 | addr = pfn_to_paddr(*pfnptr); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1096 | |
| 1097 | if ((addr >= block->target_start) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1098 | (addr + TARGET_PAGE_SIZE <= block->target_end)) { |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1099 | buf = block->host_addr + (addr - block->target_start); |
| 1100 | } else { |
| 1101 | /* the next page is in the next block */ |
| 1102 | block = QTAILQ_NEXT(block, next); |
| 1103 | *blockptr = block; |
| 1104 | if (!block) { |
| 1105 | return false; |
| 1106 | } |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1107 | assert((block->target_start & ~TARGET_PAGE_MASK) == 0); |
| 1108 | assert((block->target_end & ~TARGET_PAGE_MASK) == 0); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1109 | *pfnptr = paddr_to_pfn(block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1110 | buf = block->host_addr; |
| 1111 | } |
| 1112 | |
| 1113 | if (bufptr) { |
| 1114 | *bufptr = buf; |
| 1115 | } |
| 1116 | |
| 1117 | return true; |
| 1118 | } |
| 1119 | |
| 1120 | static int write_dump_bitmap(DumpState *s) |
| 1121 | { |
| 1122 | int ret = 0; |
| 1123 | uint64_t last_pfn, pfn; |
| 1124 | void *dump_bitmap_buf; |
| 1125 | size_t num_dumpable; |
| 1126 | GuestPhysBlock *block_iter = NULL; |
| 1127 | |
| 1128 | /* dump_bitmap_buf is used to store dump_bitmap temporarily */ |
| 1129 | dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP); |
| 1130 | |
| 1131 | num_dumpable = 0; |
| 1132 | last_pfn = 0; |
| 1133 | |
| 1134 | /* |
| 1135 | * exam memory page by page, and set the bit in dump_bitmap corresponded |
| 1136 | * to the existing page. |
| 1137 | */ |
| 1138 | while (get_next_page(&block_iter, &pfn, NULL, s)) { |
| 1139 | ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s); |
| 1140 | if (ret < 0) { |
| 1141 | dump_error(s, "dump: failed to set dump_bitmap.\n"); |
| 1142 | ret = -1; |
| 1143 | goto out; |
| 1144 | } |
| 1145 | |
| 1146 | last_pfn = pfn; |
| 1147 | num_dumpable++; |
| 1148 | } |
| 1149 | |
| 1150 | /* |
| 1151 | * set_dump_bitmap will always leave the recently set bit un-sync. Here we |
| 1152 | * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be |
| 1153 | * synchronized into vmcore. |
| 1154 | */ |
| 1155 | if (num_dumpable > 0) { |
| 1156 | ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false, |
| 1157 | dump_bitmap_buf, s); |
| 1158 | if (ret < 0) { |
| 1159 | dump_error(s, "dump: failed to sync dump_bitmap.\n"); |
| 1160 | ret = -1; |
| 1161 | goto out; |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | /* number of dumpable pages that will be dumped later */ |
| 1166 | s->num_dumpable = num_dumpable; |
| 1167 | |
| 1168 | out: |
| 1169 | g_free(dump_bitmap_buf); |
| 1170 | |
| 1171 | return ret; |
| 1172 | } |
| 1173 | |
qiaonuohan | 64cfba6 | 2014-02-18 14:11:34 +0800 | [diff] [blame] | 1174 | static void prepare_data_cache(DataCache *data_cache, DumpState *s, |
| 1175 | off_t offset) |
| 1176 | { |
| 1177 | data_cache->fd = s->fd; |
| 1178 | data_cache->data_size = 0; |
| 1179 | data_cache->buf_size = BUFSIZE_DATA_CACHE; |
| 1180 | data_cache->buf = g_malloc0(BUFSIZE_DATA_CACHE); |
| 1181 | data_cache->offset = offset; |
| 1182 | } |
| 1183 | |
| 1184 | static int write_cache(DataCache *dc, const void *buf, size_t size, |
| 1185 | bool flag_sync) |
| 1186 | { |
| 1187 | /* |
| 1188 | * dc->buf_size should not be less than size, otherwise dc will never be |
| 1189 | * enough |
| 1190 | */ |
| 1191 | assert(size <= dc->buf_size); |
| 1192 | |
| 1193 | /* |
| 1194 | * if flag_sync is set, synchronize data in dc->buf into vmcore. |
| 1195 | * otherwise check if the space is enough for caching data in buf, if not, |
| 1196 | * write the data in dc->buf to dc->fd and reset dc->buf |
| 1197 | */ |
| 1198 | if ((!flag_sync && dc->data_size + size > dc->buf_size) || |
| 1199 | (flag_sync && dc->data_size > 0)) { |
| 1200 | if (write_buffer(dc->fd, dc->offset, dc->buf, dc->data_size) < 0) { |
| 1201 | return -1; |
| 1202 | } |
| 1203 | |
| 1204 | dc->offset += dc->data_size; |
| 1205 | dc->data_size = 0; |
| 1206 | } |
| 1207 | |
| 1208 | if (!flag_sync) { |
| 1209 | memcpy(dc->buf + dc->data_size, buf, size); |
| 1210 | dc->data_size += size; |
| 1211 | } |
| 1212 | |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | static void free_data_cache(DataCache *data_cache) |
| 1217 | { |
| 1218 | g_free(data_cache->buf); |
| 1219 | } |
| 1220 | |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1221 | static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress) |
| 1222 | { |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame^] | 1223 | switch (flag_compress) { |
| 1224 | case DUMP_DH_COMPRESSED_ZLIB: |
| 1225 | return compressBound(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1226 | |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame^] | 1227 | case DUMP_DH_COMPRESSED_LZO: |
| 1228 | /* |
| 1229 | * LZO will expand incompressible data by a little amount. Please check |
| 1230 | * the following URL to see the expansion calculation: |
| 1231 | * http://www.oberhumer.com/opensource/lzo/lzofaq.php |
| 1232 | */ |
| 1233 | return page_size + page_size / 16 + 64 + 3; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1234 | |
| 1235 | #ifdef CONFIG_SNAPPY |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame^] | 1236 | case DUMP_DH_COMPRESSED_SNAPPY: |
| 1237 | return snappy_max_compressed_length(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1238 | #endif |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame^] | 1239 | } |
| 1240 | return 0; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1241 | } |
| 1242 | |
| 1243 | /* |
| 1244 | * check if the page is all 0 |
| 1245 | */ |
| 1246 | static inline bool is_zero_page(const uint8_t *buf, size_t page_size) |
| 1247 | { |
| 1248 | return buffer_is_zero(buf, page_size); |
| 1249 | } |
| 1250 | |
| 1251 | static int write_dump_pages(DumpState *s) |
| 1252 | { |
| 1253 | int ret = 0; |
| 1254 | DataCache page_desc, page_data; |
| 1255 | size_t len_buf_out, size_out; |
| 1256 | #ifdef CONFIG_LZO |
| 1257 | lzo_bytep wrkmem = NULL; |
| 1258 | #endif |
| 1259 | uint8_t *buf_out = NULL; |
| 1260 | off_t offset_desc, offset_data; |
| 1261 | PageDescriptor pd, pd_zero; |
| 1262 | uint8_t *buf; |
| 1263 | int endian = s->dump_info.d_endian; |
| 1264 | GuestPhysBlock *block_iter = NULL; |
| 1265 | uint64_t pfn_iter; |
| 1266 | |
| 1267 | /* get offset of page_desc and page_data in dump file */ |
| 1268 | offset_desc = s->offset_page; |
| 1269 | offset_data = offset_desc + sizeof(PageDescriptor) * s->num_dumpable; |
| 1270 | |
| 1271 | prepare_data_cache(&page_desc, s, offset_desc); |
| 1272 | prepare_data_cache(&page_data, s, offset_data); |
| 1273 | |
| 1274 | /* prepare buffer to store compressed data */ |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1275 | len_buf_out = get_len_buf_out(TARGET_PAGE_SIZE, s->flag_compress); |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame^] | 1276 | assert(len_buf_out != 0); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1277 | |
| 1278 | #ifdef CONFIG_LZO |
| 1279 | wrkmem = g_malloc(LZO1X_1_MEM_COMPRESS); |
| 1280 | #endif |
| 1281 | |
| 1282 | buf_out = g_malloc(len_buf_out); |
| 1283 | |
| 1284 | /* |
| 1285 | * init zero page's page_desc and page_data, because every zero page |
| 1286 | * uses the same page_data |
| 1287 | */ |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1288 | pd_zero.size = cpu_convert_to_target32(TARGET_PAGE_SIZE, endian); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1289 | pd_zero.flags = cpu_convert_to_target32(0, endian); |
| 1290 | pd_zero.offset = cpu_convert_to_target64(offset_data, endian); |
| 1291 | pd_zero.page_flags = cpu_convert_to_target64(0, endian); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1292 | buf = g_malloc0(TARGET_PAGE_SIZE); |
| 1293 | ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1294 | g_free(buf); |
| 1295 | if (ret < 0) { |
| 1296 | dump_error(s, "dump: failed to write page data(zero page).\n"); |
| 1297 | goto out; |
| 1298 | } |
| 1299 | |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1300 | offset_data += TARGET_PAGE_SIZE; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1301 | |
| 1302 | /* |
| 1303 | * dump memory to vmcore page by page. zero page will all be resided in the |
| 1304 | * first page of page section |
| 1305 | */ |
| 1306 | while (get_next_page(&block_iter, &pfn_iter, &buf, s)) { |
| 1307 | /* check zero page */ |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1308 | if (is_zero_page(buf, TARGET_PAGE_SIZE)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1309 | ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor), |
| 1310 | false); |
| 1311 | if (ret < 0) { |
| 1312 | dump_error(s, "dump: failed to write page desc.\n"); |
| 1313 | goto out; |
| 1314 | } |
| 1315 | } else { |
| 1316 | /* |
| 1317 | * not zero page, then: |
| 1318 | * 1. compress the page |
| 1319 | * 2. write the compressed page into the cache of page_data |
| 1320 | * 3. get page desc of the compressed page and write it into the |
| 1321 | * cache of page_desc |
| 1322 | * |
| 1323 | * only one compression format will be used here, for |
| 1324 | * s->flag_compress is set. But when compression fails to work, |
| 1325 | * we fall back to save in plaintext. |
| 1326 | */ |
| 1327 | size_out = len_buf_out; |
| 1328 | if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1329 | (compress2(buf_out, (uLongf *)&size_out, buf, |
| 1330 | TARGET_PAGE_SIZE, Z_BEST_SPEED) == Z_OK) && |
| 1331 | (size_out < TARGET_PAGE_SIZE)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1332 | pd.flags = cpu_convert_to_target32(DUMP_DH_COMPRESSED_ZLIB, |
| 1333 | endian); |
| 1334 | pd.size = cpu_convert_to_target32(size_out, endian); |
| 1335 | |
| 1336 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1337 | if (ret < 0) { |
| 1338 | dump_error(s, "dump: failed to write page data.\n"); |
| 1339 | goto out; |
| 1340 | } |
| 1341 | #ifdef CONFIG_LZO |
| 1342 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1343 | (lzo1x_1_compress(buf, TARGET_PAGE_SIZE, buf_out, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1344 | (lzo_uint *)&size_out, wrkmem) == LZO_E_OK) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1345 | (size_out < TARGET_PAGE_SIZE)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1346 | pd.flags = cpu_convert_to_target32(DUMP_DH_COMPRESSED_LZO, |
| 1347 | endian); |
| 1348 | pd.size = cpu_convert_to_target32(size_out, endian); |
| 1349 | |
| 1350 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1351 | if (ret < 0) { |
| 1352 | dump_error(s, "dump: failed to write page data.\n"); |
| 1353 | goto out; |
| 1354 | } |
| 1355 | #endif |
| 1356 | #ifdef CONFIG_SNAPPY |
| 1357 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1358 | (snappy_compress((char *)buf, TARGET_PAGE_SIZE, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1359 | (char *)buf_out, &size_out) == SNAPPY_OK) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1360 | (size_out < TARGET_PAGE_SIZE)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1361 | pd.flags = cpu_convert_to_target32( |
| 1362 | DUMP_DH_COMPRESSED_SNAPPY, endian); |
| 1363 | pd.size = cpu_convert_to_target32(size_out, endian); |
| 1364 | |
| 1365 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1366 | if (ret < 0) { |
| 1367 | dump_error(s, "dump: failed to write page data.\n"); |
| 1368 | goto out; |
| 1369 | } |
| 1370 | #endif |
| 1371 | } else { |
| 1372 | /* |
| 1373 | * fall back to save in plaintext, size_out should be |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1374 | * assigned TARGET_PAGE_SIZE |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1375 | */ |
| 1376 | pd.flags = cpu_convert_to_target32(0, endian); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1377 | size_out = TARGET_PAGE_SIZE; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1378 | pd.size = cpu_convert_to_target32(size_out, endian); |
| 1379 | |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1380 | ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1381 | if (ret < 0) { |
| 1382 | dump_error(s, "dump: failed to write page data.\n"); |
| 1383 | goto out; |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /* get and write page desc here */ |
| 1388 | pd.page_flags = cpu_convert_to_target64(0, endian); |
| 1389 | pd.offset = cpu_convert_to_target64(offset_data, endian); |
| 1390 | offset_data += size_out; |
| 1391 | |
| 1392 | ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false); |
| 1393 | if (ret < 0) { |
| 1394 | dump_error(s, "dump: failed to write page desc.\n"); |
| 1395 | goto out; |
| 1396 | } |
| 1397 | } |
| 1398 | } |
| 1399 | |
| 1400 | ret = write_cache(&page_desc, NULL, 0, true); |
| 1401 | if (ret < 0) { |
| 1402 | dump_error(s, "dump: failed to sync cache for page_desc.\n"); |
| 1403 | goto out; |
| 1404 | } |
| 1405 | ret = write_cache(&page_data, NULL, 0, true); |
| 1406 | if (ret < 0) { |
| 1407 | dump_error(s, "dump: failed to sync cache for page_data.\n"); |
| 1408 | goto out; |
| 1409 | } |
| 1410 | |
| 1411 | out: |
| 1412 | free_data_cache(&page_desc); |
| 1413 | free_data_cache(&page_data); |
| 1414 | |
| 1415 | #ifdef CONFIG_LZO |
| 1416 | g_free(wrkmem); |
| 1417 | #endif |
| 1418 | |
| 1419 | g_free(buf_out); |
| 1420 | |
| 1421 | return ret; |
| 1422 | } |
| 1423 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1424 | static int create_kdump_vmcore(DumpState *s) |
| 1425 | { |
| 1426 | int ret; |
| 1427 | |
| 1428 | /* |
| 1429 | * the kdump-compressed format is: |
| 1430 | * File offset |
| 1431 | * +------------------------------------------+ 0x0 |
| 1432 | * | main header (struct disk_dump_header) | |
| 1433 | * |------------------------------------------+ block 1 |
| 1434 | * | sub header (struct kdump_sub_header) | |
| 1435 | * |------------------------------------------+ block 2 |
| 1436 | * | 1st-dump_bitmap | |
| 1437 | * |------------------------------------------+ block 2 + X blocks |
| 1438 | * | 2nd-dump_bitmap | (aligned by block) |
| 1439 | * |------------------------------------------+ block 2 + 2 * X blocks |
| 1440 | * | page desc for pfn 0 (struct page_desc) | (aligned by block) |
| 1441 | * | page desc for pfn 1 (struct page_desc) | |
| 1442 | * | : | |
| 1443 | * |------------------------------------------| (not aligned by block) |
| 1444 | * | page data (pfn 0) | |
| 1445 | * | page data (pfn 1) | |
| 1446 | * | : | |
| 1447 | * +------------------------------------------+ |
| 1448 | */ |
| 1449 | |
| 1450 | ret = write_start_flat_header(s->fd); |
| 1451 | if (ret < 0) { |
| 1452 | dump_error(s, "dump: failed to write start flat header.\n"); |
| 1453 | return -1; |
| 1454 | } |
| 1455 | |
| 1456 | ret = write_dump_header(s); |
| 1457 | if (ret < 0) { |
| 1458 | return -1; |
| 1459 | } |
| 1460 | |
| 1461 | ret = write_dump_bitmap(s); |
| 1462 | if (ret < 0) { |
| 1463 | return -1; |
| 1464 | } |
| 1465 | |
| 1466 | ret = write_dump_pages(s); |
| 1467 | if (ret < 0) { |
| 1468 | return -1; |
| 1469 | } |
| 1470 | |
| 1471 | ret = write_end_flat_header(s->fd); |
| 1472 | if (ret < 0) { |
| 1473 | dump_error(s, "dump: failed to write end flat header.\n"); |
| 1474 | return -1; |
| 1475 | } |
| 1476 | |
| 1477 | dump_completed(s); |
| 1478 | |
| 1479 | return 0; |
| 1480 | } |
| 1481 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1482 | static ram_addr_t get_start_block(DumpState *s) |
| 1483 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1484 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1485 | |
| 1486 | if (!s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1487 | s->next_block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1488 | return 0; |
| 1489 | } |
| 1490 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1491 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
| 1492 | if (block->target_start >= s->begin + s->length || |
| 1493 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1494 | /* This block is out of the range */ |
| 1495 | continue; |
| 1496 | } |
| 1497 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1498 | s->next_block = block; |
| 1499 | if (s->begin > block->target_start) { |
| 1500 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1501 | } else { |
| 1502 | s->start = 0; |
| 1503 | } |
| 1504 | return s->start; |
| 1505 | } |
| 1506 | |
| 1507 | return -1; |
| 1508 | } |
| 1509 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1510 | static void get_max_mapnr(DumpState *s) |
| 1511 | { |
| 1512 | GuestPhysBlock *last_block; |
| 1513 | |
| 1514 | last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1515 | s->max_mapnr = paddr_to_pfn(last_block->target_end); |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1516 | } |
| 1517 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1518 | static int dump_init(DumpState *s, int fd, bool has_format, |
| 1519 | DumpGuestMemoryFormat format, bool paging, bool has_filter, |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1520 | int64_t begin, int64_t length, Error **errp) |
| 1521 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 1522 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1523 | int nr_cpus; |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1524 | Error *err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1525 | int ret; |
| 1526 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1527 | /* kdump-compressed is conflict with paging and filter */ |
| 1528 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1529 | assert(!paging && !has_filter); |
| 1530 | } |
| 1531 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1532 | if (runstate_is_running()) { |
| 1533 | vm_stop(RUN_STATE_SAVE_VM); |
| 1534 | s->resume = true; |
| 1535 | } else { |
| 1536 | s->resume = false; |
| 1537 | } |
| 1538 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1539 | /* If we use KVM, we should synchronize the registers before we get dump |
| 1540 | * info or physmap info. |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1541 | */ |
Andreas Färber | 1b3509c | 2013-06-09 16:48:29 +0200 | [diff] [blame] | 1542 | cpu_synchronize_all_states(); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1543 | nr_cpus = 0; |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 1544 | CPU_FOREACH(cpu) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1545 | nr_cpus++; |
| 1546 | } |
| 1547 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1548 | s->fd = fd; |
| 1549 | s->has_filter = has_filter; |
| 1550 | s->begin = begin; |
| 1551 | s->length = length; |
| 1552 | |
| 1553 | guest_phys_blocks_init(&s->guest_phys_blocks); |
Laszlo Ersek | c5d7f60 | 2013-08-06 12:37:10 +0200 | [diff] [blame] | 1554 | guest_phys_blocks_append(&s->guest_phys_blocks); |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1555 | |
| 1556 | s->start = get_start_block(s); |
| 1557 | if (s->start == -1) { |
| 1558 | error_set(errp, QERR_INVALID_PARAMETER, "begin"); |
| 1559 | goto cleanup; |
| 1560 | } |
| 1561 | |
| 1562 | /* get dump info: endian, class and architecture. |
| 1563 | * If the target architecture is not supported, cpu_get_dump_info() will |
| 1564 | * return -1. |
| 1565 | */ |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1566 | ret = cpu_get_dump_info(&s->dump_info, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1567 | if (ret < 0) { |
| 1568 | error_set(errp, QERR_UNSUPPORTED); |
| 1569 | goto cleanup; |
| 1570 | } |
| 1571 | |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1572 | s->note_size = cpu_get_note_size(s->dump_info.d_class, |
| 1573 | s->dump_info.d_machine, nr_cpus); |
Aneesh Kumar K.V | bb6b684 | 2013-10-01 21:49:32 +0530 | [diff] [blame] | 1574 | if (s->note_size < 0) { |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1575 | error_set(errp, QERR_UNSUPPORTED); |
| 1576 | goto cleanup; |
| 1577 | } |
| 1578 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1579 | /* get memory mapping */ |
| 1580 | memory_mapping_list_init(&s->list); |
| 1581 | if (paging) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1582 | qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err); |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1583 | if (err != NULL) { |
| 1584 | error_propagate(errp, err); |
| 1585 | goto cleanup; |
| 1586 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1587 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1588 | qemu_get_guest_simple_memory_mapping(&s->list, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1589 | } |
| 1590 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1591 | s->nr_cpus = nr_cpus; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1592 | |
| 1593 | get_max_mapnr(s); |
| 1594 | |
| 1595 | uint64_t tmp; |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1596 | tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), TARGET_PAGE_SIZE); |
| 1597 | s->len_dump_bitmap = tmp * TARGET_PAGE_SIZE; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1598 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1599 | /* init for kdump-compressed format */ |
| 1600 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1601 | switch (format) { |
| 1602 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB: |
| 1603 | s->flag_compress = DUMP_DH_COMPRESSED_ZLIB; |
| 1604 | break; |
| 1605 | |
| 1606 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO: |
Laszlo Ersek | c998acb | 2014-05-20 13:42:22 +0200 | [diff] [blame] | 1607 | #ifdef CONFIG_LZO |
| 1608 | if (lzo_init() != LZO_E_OK) { |
| 1609 | error_setg(errp, "failed to initialize the LZO library"); |
| 1610 | goto cleanup; |
| 1611 | } |
| 1612 | #endif |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1613 | s->flag_compress = DUMP_DH_COMPRESSED_LZO; |
| 1614 | break; |
| 1615 | |
| 1616 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY: |
| 1617 | s->flag_compress = DUMP_DH_COMPRESSED_SNAPPY; |
| 1618 | break; |
| 1619 | |
| 1620 | default: |
| 1621 | s->flag_compress = 0; |
| 1622 | } |
| 1623 | |
| 1624 | return 0; |
| 1625 | } |
| 1626 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1627 | if (s->has_filter) { |
| 1628 | memory_mapping_filter(&s->list, s->begin, s->length); |
| 1629 | } |
| 1630 | |
| 1631 | /* |
| 1632 | * calculate phdr_num |
| 1633 | * |
| 1634 | * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow |
| 1635 | */ |
| 1636 | s->phdr_num = 1; /* PT_NOTE */ |
| 1637 | if (s->list.num < UINT16_MAX - 2) { |
| 1638 | s->phdr_num += s->list.num; |
| 1639 | s->have_section = false; |
| 1640 | } else { |
| 1641 | s->have_section = true; |
| 1642 | s->phdr_num = PN_XNUM; |
| 1643 | s->sh_info = 1; /* PT_NOTE */ |
| 1644 | |
| 1645 | /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */ |
| 1646 | if (s->list.num <= UINT32_MAX - 1) { |
| 1647 | s->sh_info += s->list.num; |
| 1648 | } else { |
| 1649 | s->sh_info = UINT32_MAX; |
| 1650 | } |
| 1651 | } |
| 1652 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1653 | if (s->dump_info.d_class == ELFCLASS64) { |
| 1654 | if (s->have_section) { |
| 1655 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1656 | sizeof(Elf64_Phdr) * s->sh_info + |
| 1657 | sizeof(Elf64_Shdr) + s->note_size; |
| 1658 | } else { |
| 1659 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1660 | sizeof(Elf64_Phdr) * s->phdr_num + s->note_size; |
| 1661 | } |
| 1662 | } else { |
| 1663 | if (s->have_section) { |
| 1664 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1665 | sizeof(Elf32_Phdr) * s->sh_info + |
| 1666 | sizeof(Elf32_Shdr) + s->note_size; |
| 1667 | } else { |
| 1668 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1669 | sizeof(Elf32_Phdr) * s->phdr_num + s->note_size; |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | return 0; |
| 1674 | |
| 1675 | cleanup: |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1676 | guest_phys_blocks_free(&s->guest_phys_blocks); |
| 1677 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1678 | if (s->resume) { |
| 1679 | vm_start(); |
| 1680 | } |
| 1681 | |
| 1682 | return -1; |
| 1683 | } |
| 1684 | |
| 1685 | void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1686 | int64_t begin, bool has_length, |
| 1687 | int64_t length, bool has_format, |
| 1688 | DumpGuestMemoryFormat format, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1689 | { |
| 1690 | const char *p; |
| 1691 | int fd = -1; |
| 1692 | DumpState *s; |
| 1693 | int ret; |
| 1694 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1695 | /* |
| 1696 | * kdump-compressed format need the whole memory dumped, so paging or |
| 1697 | * filter is not supported here. |
| 1698 | */ |
| 1699 | if ((has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) && |
| 1700 | (paging || has_begin || has_length)) { |
| 1701 | error_setg(errp, "kdump-compressed format doesn't support paging or " |
| 1702 | "filter"); |
| 1703 | return; |
| 1704 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1705 | if (has_begin && !has_length) { |
| 1706 | error_set(errp, QERR_MISSING_PARAMETER, "length"); |
| 1707 | return; |
| 1708 | } |
| 1709 | if (!has_begin && has_length) { |
| 1710 | error_set(errp, QERR_MISSING_PARAMETER, "begin"); |
| 1711 | return; |
| 1712 | } |
| 1713 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1714 | /* check whether lzo/snappy is supported */ |
| 1715 | #ifndef CONFIG_LZO |
| 1716 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO) { |
| 1717 | error_setg(errp, "kdump-lzo is not available now"); |
| 1718 | return; |
| 1719 | } |
| 1720 | #endif |
| 1721 | |
| 1722 | #ifndef CONFIG_SNAPPY |
| 1723 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY) { |
| 1724 | error_setg(errp, "kdump-snappy is not available now"); |
| 1725 | return; |
| 1726 | } |
| 1727 | #endif |
| 1728 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1729 | #if !defined(WIN32) |
| 1730 | if (strstart(file, "fd:", &p)) { |
Paolo Bonzini | a9940fc | 2012-09-20 16:50:32 +0200 | [diff] [blame] | 1731 | fd = monitor_get_fd(cur_mon, p, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1732 | if (fd == -1) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1733 | return; |
| 1734 | } |
| 1735 | } |
| 1736 | #endif |
| 1737 | |
| 1738 | if (strstart(file, "file:", &p)) { |
| 1739 | fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR); |
| 1740 | if (fd < 0) { |
Luiz Capitulino | 7581766 | 2013-06-07 14:36:01 -0400 | [diff] [blame] | 1741 | error_setg_file_open(errp, errno, p); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1742 | return; |
| 1743 | } |
| 1744 | } |
| 1745 | |
| 1746 | if (fd == -1) { |
| 1747 | error_set(errp, QERR_INVALID_PARAMETER, "protocol"); |
| 1748 | return; |
| 1749 | } |
| 1750 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1751 | s = g_malloc0(sizeof(DumpState)); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1752 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1753 | ret = dump_init(s, fd, has_format, format, paging, has_begin, |
| 1754 | begin, length, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1755 | if (ret < 0) { |
| 1756 | g_free(s); |
| 1757 | return; |
| 1758 | } |
| 1759 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1760 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
Markus Armbruster | 66ef8bd | 2014-05-02 13:26:41 +0200 | [diff] [blame] | 1761 | if (create_kdump_vmcore(s) < 0) { |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1762 | error_set(errp, QERR_IO_ERROR); |
| 1763 | } |
| 1764 | } else { |
Markus Armbruster | 66ef8bd | 2014-05-02 13:26:41 +0200 | [diff] [blame] | 1765 | if (create_vmcore(s) < 0) { |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1766 | error_set(errp, QERR_IO_ERROR); |
| 1767 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1768 | } |
| 1769 | |
| 1770 | g_free(s); |
| 1771 | } |
qiaonuohan | 7d6dc7f | 2014-02-18 14:11:38 +0800 | [diff] [blame] | 1772 | |
| 1773 | DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp) |
| 1774 | { |
| 1775 | DumpGuestMemoryFormatList *item; |
| 1776 | DumpGuestMemoryCapability *cap = |
| 1777 | g_malloc0(sizeof(DumpGuestMemoryCapability)); |
| 1778 | |
| 1779 | /* elf is always available */ |
| 1780 | item = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1781 | cap->formats = item; |
| 1782 | item->value = DUMP_GUEST_MEMORY_FORMAT_ELF; |
| 1783 | |
| 1784 | /* kdump-zlib is always available */ |
| 1785 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1786 | item = item->next; |
| 1787 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB; |
| 1788 | |
| 1789 | /* add new item if kdump-lzo is available */ |
| 1790 | #ifdef CONFIG_LZO |
| 1791 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1792 | item = item->next; |
| 1793 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO; |
| 1794 | #endif |
| 1795 | |
| 1796 | /* add new item if kdump-snappy is available */ |
| 1797 | #ifdef CONFIG_SNAPPY |
| 1798 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1799 | item = item->next; |
| 1800 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY; |
| 1801 | #endif |
| 1802 | |
| 1803 | return cap; |
| 1804 | } |