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 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 39 | uint16_t cpu_to_dump16(DumpState *s, uint16_t val) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 40 | { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 41 | if (s->dump_info.d_endian == ELFDATA2LSB) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 42 | val = cpu_to_le16(val); |
| 43 | } else { |
| 44 | val = cpu_to_be16(val); |
| 45 | } |
| 46 | |
| 47 | return val; |
| 48 | } |
| 49 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 50 | uint32_t cpu_to_dump32(DumpState *s, uint32_t val) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 51 | { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 52 | if (s->dump_info.d_endian == ELFDATA2LSB) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 53 | val = cpu_to_le32(val); |
| 54 | } else { |
| 55 | val = cpu_to_be32(val); |
| 56 | } |
| 57 | |
| 58 | return val; |
| 59 | } |
| 60 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 61 | uint64_t cpu_to_dump64(DumpState *s, uint64_t val) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 62 | { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 63 | if (s->dump_info.d_endian == ELFDATA2LSB) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 64 | val = cpu_to_le64(val); |
| 65 | } else { |
| 66 | val = cpu_to_be64(val); |
| 67 | } |
| 68 | |
| 69 | return val; |
| 70 | } |
| 71 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 72 | static int dump_cleanup(DumpState *s) |
| 73 | { |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 74 | guest_phys_blocks_free(&s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 75 | memory_mapping_list_free(&s->list); |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 76 | close(s->fd); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 77 | if (s->resume) { |
| 78 | vm_start(); |
| 79 | } |
| 80 | |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 81 | return 0; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 82 | } |
| 83 | |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 84 | static void dump_error(DumpState *s, const char *reason, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 85 | { |
| 86 | dump_cleanup(s); |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 87 | error_setg(errp, "%s", reason); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 88 | } |
| 89 | |
qiaonuohan | b5ba1cc | 2014-02-18 14:11:25 +0800 | [diff] [blame] | 90 | 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] | 91 | { |
| 92 | DumpState *s = opaque; |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 93 | size_t written_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 94 | |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 95 | written_size = qemu_write_full(s->fd, buf, size); |
| 96 | if (written_size != size) { |
| 97 | return -1; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 103 | static void write_elf64_header(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 104 | { |
| 105 | Elf64_Ehdr elf_header; |
| 106 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 107 | |
| 108 | memset(&elf_header, 0, sizeof(Elf64_Ehdr)); |
| 109 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 110 | elf_header.e_ident[EI_CLASS] = ELFCLASS64; |
| 111 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
| 112 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 113 | elf_header.e_type = cpu_to_dump16(s, ET_CORE); |
| 114 | elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); |
| 115 | elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); |
| 116 | elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); |
| 117 | elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr)); |
| 118 | elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr)); |
| 119 | elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 120 | if (s->have_section) { |
| 121 | uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; |
| 122 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 123 | elf_header.e_shoff = cpu_to_dump64(s, shoff); |
| 124 | elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr)); |
| 125 | elf_header.e_shnum = cpu_to_dump16(s, 1); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 129 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 130 | dump_error(s, "dump: failed to write elf header", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 131 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 132 | } |
| 133 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 134 | static void write_elf32_header(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 135 | { |
| 136 | Elf32_Ehdr elf_header; |
| 137 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 138 | |
| 139 | memset(&elf_header, 0, sizeof(Elf32_Ehdr)); |
| 140 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 141 | elf_header.e_ident[EI_CLASS] = ELFCLASS32; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 142 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 143 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 144 | elf_header.e_type = cpu_to_dump16(s, ET_CORE); |
| 145 | elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); |
| 146 | elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); |
| 147 | elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); |
| 148 | elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr)); |
| 149 | elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr)); |
| 150 | elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 151 | if (s->have_section) { |
| 152 | uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; |
| 153 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 154 | elf_header.e_shoff = cpu_to_dump32(s, shoff); |
| 155 | elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr)); |
| 156 | elf_header.e_shnum = cpu_to_dump16(s, 1); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 160 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 161 | dump_error(s, "dump: failed to write elf header", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 162 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 163 | } |
| 164 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 165 | static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, |
| 166 | int phdr_index, hwaddr offset, |
| 167 | hwaddr filesz, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 168 | { |
| 169 | Elf64_Phdr phdr; |
| 170 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 171 | |
| 172 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 173 | phdr.p_type = cpu_to_dump32(s, PT_LOAD); |
| 174 | phdr.p_offset = cpu_to_dump64(s, offset); |
| 175 | phdr.p_paddr = cpu_to_dump64(s, memory_mapping->phys_addr); |
| 176 | phdr.p_filesz = cpu_to_dump64(s, filesz); |
| 177 | phdr.p_memsz = cpu_to_dump64(s, memory_mapping->length); |
| 178 | phdr.p_vaddr = cpu_to_dump64(s, memory_mapping->virt_addr); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 179 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 180 | assert(memory_mapping->length >= filesz); |
| 181 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 182 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 183 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 184 | dump_error(s, "dump: failed to write program header table", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 185 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 186 | } |
| 187 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 188 | static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, |
| 189 | int phdr_index, hwaddr offset, |
| 190 | hwaddr filesz, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 191 | { |
| 192 | Elf32_Phdr phdr; |
| 193 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 194 | |
| 195 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 196 | phdr.p_type = cpu_to_dump32(s, PT_LOAD); |
| 197 | phdr.p_offset = cpu_to_dump32(s, offset); |
| 198 | phdr.p_paddr = cpu_to_dump32(s, memory_mapping->phys_addr); |
| 199 | phdr.p_filesz = cpu_to_dump32(s, filesz); |
| 200 | phdr.p_memsz = cpu_to_dump32(s, memory_mapping->length); |
| 201 | phdr.p_vaddr = cpu_to_dump32(s, memory_mapping->virt_addr); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 202 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 203 | assert(memory_mapping->length >= filesz); |
| 204 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 205 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 206 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 207 | dump_error(s, "dump: failed to write program header table", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 208 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 209 | } |
| 210 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 211 | static void write_elf64_note(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 212 | { |
| 213 | Elf64_Phdr phdr; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 214 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 215 | int ret; |
| 216 | |
| 217 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 218 | phdr.p_type = cpu_to_dump32(s, PT_NOTE); |
| 219 | phdr.p_offset = cpu_to_dump64(s, begin); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 220 | phdr.p_paddr = 0; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 221 | phdr.p_filesz = cpu_to_dump64(s, s->note_size); |
| 222 | phdr.p_memsz = cpu_to_dump64(s, s->note_size); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 223 | phdr.p_vaddr = 0; |
| 224 | |
| 225 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 226 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 227 | dump_error(s, "dump: failed to write program header table", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 228 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 229 | } |
| 230 | |
Paolo Bonzini | 0bc3cd6 | 2013-04-08 17:29:59 +0200 | [diff] [blame] | 231 | static inline int cpu_index(CPUState *cpu) |
| 232 | { |
| 233 | return cpu->cpu_index + 1; |
| 234 | } |
| 235 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 236 | static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s, |
| 237 | Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 238 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 239 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 240 | int ret; |
| 241 | int id; |
| 242 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 243 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 244 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 245 | ret = cpu_write_elf64_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 246 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 247 | dump_error(s, "dump: failed to write elf notes", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 248 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 249 | } |
| 250 | } |
| 251 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 252 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 253 | ret = cpu_write_elf64_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 254 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 255 | dump_error(s, "dump: failed to write CPU status", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 256 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 257 | } |
| 258 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 259 | } |
| 260 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 261 | static void write_elf32_note(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 262 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 263 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 264 | Elf32_Phdr phdr; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 265 | int ret; |
| 266 | |
| 267 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 268 | phdr.p_type = cpu_to_dump32(s, PT_NOTE); |
| 269 | phdr.p_offset = cpu_to_dump32(s, begin); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 270 | phdr.p_paddr = 0; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 271 | phdr.p_filesz = cpu_to_dump32(s, s->note_size); |
| 272 | phdr.p_memsz = cpu_to_dump32(s, s->note_size); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 273 | phdr.p_vaddr = 0; |
| 274 | |
| 275 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 276 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 277 | dump_error(s, "dump: failed to write program header table", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 278 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 279 | } |
| 280 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 281 | static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s, |
| 282 | Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 283 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 284 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 285 | int ret; |
| 286 | int id; |
| 287 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 288 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 289 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 290 | ret = cpu_write_elf32_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 291 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 292 | dump_error(s, "dump: failed to write elf notes", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 293 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 294 | } |
| 295 | } |
| 296 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 297 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 298 | ret = cpu_write_elf32_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 299 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 300 | dump_error(s, "dump: failed to write CPU status", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 301 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 302 | } |
| 303 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 304 | } |
| 305 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 306 | static void write_elf_section(DumpState *s, int type, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 307 | { |
| 308 | Elf32_Shdr shdr32; |
| 309 | Elf64_Shdr shdr64; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 310 | int shdr_size; |
| 311 | void *shdr; |
| 312 | int ret; |
| 313 | |
| 314 | if (type == 0) { |
| 315 | shdr_size = sizeof(Elf32_Shdr); |
| 316 | memset(&shdr32, 0, shdr_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 317 | shdr32.sh_info = cpu_to_dump32(s, s->sh_info); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 318 | shdr = &shdr32; |
| 319 | } else { |
| 320 | shdr_size = sizeof(Elf64_Shdr); |
| 321 | memset(&shdr64, 0, shdr_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 322 | shdr64.sh_info = cpu_to_dump32(s, s->sh_info); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 323 | shdr = &shdr64; |
| 324 | } |
| 325 | |
| 326 | ret = fd_write_vmcore(&shdr, shdr_size, s); |
| 327 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 328 | dump_error(s, "dump: failed to write section header table", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 329 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 330 | } |
| 331 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 332 | static void write_data(DumpState *s, void *buf, int length, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 333 | { |
| 334 | int ret; |
| 335 | |
| 336 | ret = fd_write_vmcore(buf, length, s); |
| 337 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 338 | dump_error(s, "dump: failed to save memory", errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 339 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 340 | } |
| 341 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 342 | /* write the memory to vmcore. 1 page per I/O. */ |
| 343 | static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, |
| 344 | int64_t size, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 345 | { |
| 346 | int64_t i; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 347 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 348 | |
| 349 | for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 350 | write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, |
| 351 | TARGET_PAGE_SIZE, &local_err); |
| 352 | if (local_err) { |
| 353 | error_propagate(errp, local_err); |
| 354 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 355 | } |
| 356 | } |
| 357 | |
| 358 | if ((size % TARGET_PAGE_SIZE) != 0) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 359 | write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, |
| 360 | size % TARGET_PAGE_SIZE, &local_err); |
| 361 | if (local_err) { |
| 362 | error_propagate(errp, local_err); |
| 363 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 364 | } |
| 365 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 366 | } |
| 367 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 368 | /* get the memory's offset and size in the vmcore */ |
| 369 | static void get_offset_range(hwaddr phys_addr, |
| 370 | ram_addr_t mapping_length, |
| 371 | DumpState *s, |
| 372 | hwaddr *p_offset, |
| 373 | hwaddr *p_filesz) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 374 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 375 | GuestPhysBlock *block; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 376 | hwaddr offset = s->memory_offset; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 377 | int64_t size_in_block, start; |
| 378 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 379 | /* When the memory is not stored into vmcore, offset will be -1 */ |
| 380 | *p_offset = -1; |
| 381 | *p_filesz = 0; |
| 382 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 383 | if (s->has_filter) { |
| 384 | if (phys_addr < s->begin || phys_addr >= s->begin + s->length) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 385 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 386 | } |
| 387 | } |
| 388 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 389 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 390 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 391 | if (block->target_start >= s->begin + s->length || |
| 392 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 393 | /* This block is out of the range */ |
| 394 | continue; |
| 395 | } |
| 396 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 397 | if (s->begin <= block->target_start) { |
| 398 | start = block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 399 | } else { |
| 400 | start = s->begin; |
| 401 | } |
| 402 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 403 | size_in_block = block->target_end - start; |
| 404 | if (s->begin + s->length < block->target_end) { |
| 405 | size_in_block -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 406 | } |
| 407 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 408 | start = block->target_start; |
| 409 | size_in_block = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | if (phys_addr >= start && phys_addr < start + size_in_block) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 413 | *p_offset = phys_addr - start + offset; |
| 414 | |
| 415 | /* The offset range mapped from the vmcore file must not spill over |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 416 | * the GuestPhysBlock, clamp it. The rest of the mapping will be |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 417 | * zero-filled in memory at load time; see |
| 418 | * <http://refspecs.linuxbase.org/elf/gabi4+/ch5.pheader.html>. |
| 419 | */ |
| 420 | *p_filesz = phys_addr + mapping_length <= start + size_in_block ? |
| 421 | mapping_length : |
| 422 | size_in_block - (phys_addr - start); |
| 423 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | offset += size_in_block; |
| 427 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 428 | } |
| 429 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 430 | static void write_elf_loads(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 431 | { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 432 | hwaddr offset, filesz; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 433 | MemoryMapping *memory_mapping; |
| 434 | uint32_t phdr_index = 1; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 435 | uint32_t max_index; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 436 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 437 | |
| 438 | if (s->have_section) { |
| 439 | max_index = s->sh_info; |
| 440 | } else { |
| 441 | max_index = s->phdr_num; |
| 442 | } |
| 443 | |
| 444 | QTAILQ_FOREACH(memory_mapping, &s->list.head, next) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 445 | get_offset_range(memory_mapping->phys_addr, |
| 446 | memory_mapping->length, |
| 447 | s, &offset, &filesz); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 448 | if (s->dump_info.d_class == ELFCLASS64) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 449 | write_elf64_load(s, memory_mapping, phdr_index++, offset, |
| 450 | filesz, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 451 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 452 | write_elf32_load(s, memory_mapping, phdr_index++, offset, |
| 453 | filesz, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 454 | } |
| 455 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 456 | if (local_err) { |
| 457 | error_propagate(errp, local_err); |
| 458 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | if (phdr_index >= max_index) { |
| 462 | break; |
| 463 | } |
| 464 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | /* write elf header, PT_NOTE and elf note to vmcore. */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 468 | static void dump_begin(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 469 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 470 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 471 | |
| 472 | /* |
| 473 | * the vmcore's format is: |
| 474 | * -------------- |
| 475 | * | elf header | |
| 476 | * -------------- |
| 477 | * | PT_NOTE | |
| 478 | * -------------- |
| 479 | * | PT_LOAD | |
| 480 | * -------------- |
| 481 | * | ...... | |
| 482 | * -------------- |
| 483 | * | PT_LOAD | |
| 484 | * -------------- |
| 485 | * | sec_hdr | |
| 486 | * -------------- |
| 487 | * | elf note | |
| 488 | * -------------- |
| 489 | * | memory | |
| 490 | * -------------- |
| 491 | * |
| 492 | * we only know where the memory is saved after we write elf note into |
| 493 | * vmcore. |
| 494 | */ |
| 495 | |
| 496 | /* write elf header to vmcore */ |
| 497 | if (s->dump_info.d_class == ELFCLASS64) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 498 | write_elf64_header(s, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 499 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 500 | write_elf32_header(s, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 501 | } |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 502 | if (local_err) { |
| 503 | error_propagate(errp, local_err); |
| 504 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | if (s->dump_info.d_class == ELFCLASS64) { |
| 508 | /* write PT_NOTE to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 509 | write_elf64_note(s, &local_err); |
| 510 | if (local_err) { |
| 511 | error_propagate(errp, local_err); |
| 512 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | /* write all PT_LOAD to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 516 | write_elf_loads(s, &local_err); |
| 517 | if (local_err) { |
| 518 | error_propagate(errp, local_err); |
| 519 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | /* write section to vmcore */ |
| 523 | if (s->have_section) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 524 | write_elf_section(s, 1, &local_err); |
| 525 | if (local_err) { |
| 526 | error_propagate(errp, local_err); |
| 527 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 528 | } |
| 529 | } |
| 530 | |
| 531 | /* write notes to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 532 | write_elf64_notes(fd_write_vmcore, s, &local_err); |
| 533 | if (local_err) { |
| 534 | error_propagate(errp, local_err); |
| 535 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 536 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 537 | } else { |
| 538 | /* write PT_NOTE to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 539 | write_elf32_note(s, &local_err); |
| 540 | if (local_err) { |
| 541 | error_propagate(errp, local_err); |
| 542 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /* write all PT_LOAD to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 546 | write_elf_loads(s, &local_err); |
| 547 | if (local_err) { |
| 548 | error_propagate(errp, local_err); |
| 549 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | /* write section to vmcore */ |
| 553 | if (s->have_section) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 554 | write_elf_section(s, 0, &local_err); |
| 555 | if (local_err) { |
| 556 | error_propagate(errp, local_err); |
| 557 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 558 | } |
| 559 | } |
| 560 | |
| 561 | /* write notes to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 562 | write_elf32_notes(fd_write_vmcore, s, &local_err); |
| 563 | if (local_err) { |
| 564 | error_propagate(errp, local_err); |
| 565 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 566 | } |
| 567 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 568 | } |
| 569 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 570 | static void dump_completed(DumpState *s) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 571 | { |
| 572 | dump_cleanup(s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 573 | } |
| 574 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 575 | static int get_next_block(DumpState *s, GuestPhysBlock *block) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 576 | { |
| 577 | while (1) { |
Paolo Bonzini | a316103 | 2012-11-14 15:54:48 +0100 | [diff] [blame] | 578 | block = QTAILQ_NEXT(block, next); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 579 | if (!block) { |
| 580 | /* no more block */ |
| 581 | return 1; |
| 582 | } |
| 583 | |
| 584 | s->start = 0; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 585 | s->next_block = block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 586 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 587 | if (block->target_start >= s->begin + s->length || |
| 588 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 589 | /* This block is out of the range */ |
| 590 | continue; |
| 591 | } |
| 592 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 593 | if (s->begin > block->target_start) { |
| 594 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 595 | } |
| 596 | } |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | /* write all memory to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 603 | static void dump_iterate(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 604 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 605 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 606 | int64_t size; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 607 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 608 | |
Gonglei | 08a655b | 2014-10-30 14:01:17 +0800 | [diff] [blame] | 609 | do { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 610 | block = s->next_block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 611 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 612 | size = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 613 | if (s->has_filter) { |
| 614 | size -= s->start; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 615 | if (s->begin + s->length < block->target_end) { |
| 616 | size -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 617 | } |
| 618 | } |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 619 | write_memory(s, block, s->start, size, &local_err); |
| 620 | if (local_err) { |
| 621 | error_propagate(errp, local_err); |
| 622 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 623 | } |
| 624 | |
Gonglei | 08a655b | 2014-10-30 14:01:17 +0800 | [diff] [blame] | 625 | } while (!get_next_block(s, block)); |
| 626 | |
| 627 | dump_completed(s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 628 | } |
| 629 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 630 | static void create_vmcore(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 631 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 632 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 633 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 634 | dump_begin(s, &local_err); |
| 635 | if (local_err) { |
| 636 | error_propagate(errp, local_err); |
| 637 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 638 | } |
| 639 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 640 | dump_iterate(s, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 641 | } |
| 642 | |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 643 | static int write_start_flat_header(int fd) |
| 644 | { |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 645 | MakedumpfileHeader *mh; |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 646 | int ret = 0; |
| 647 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 648 | QEMU_BUILD_BUG_ON(sizeof *mh > MAX_SIZE_MDF_HEADER); |
| 649 | mh = g_malloc0(MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 650 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 651 | memcpy(mh->signature, MAKEDUMPFILE_SIGNATURE, |
| 652 | MIN(sizeof mh->signature, sizeof MAKEDUMPFILE_SIGNATURE)); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 653 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 654 | mh->type = cpu_to_be64(TYPE_FLAT_HEADER); |
| 655 | mh->version = cpu_to_be64(VERSION_FLAT_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 656 | |
| 657 | size_t written_size; |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 658 | written_size = qemu_write_full(fd, mh, MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 659 | if (written_size != MAX_SIZE_MDF_HEADER) { |
| 660 | ret = -1; |
| 661 | } |
| 662 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 663 | g_free(mh); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | static int write_end_flat_header(int fd) |
| 668 | { |
| 669 | MakedumpfileDataHeader mdh; |
| 670 | |
| 671 | mdh.offset = END_FLAG_FLAT_HEADER; |
| 672 | mdh.buf_size = END_FLAG_FLAT_HEADER; |
| 673 | |
| 674 | size_t written_size; |
| 675 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 676 | if (written_size != sizeof(mdh)) { |
| 677 | return -1; |
| 678 | } |
| 679 | |
| 680 | return 0; |
| 681 | } |
| 682 | |
qiaonuohan | 5d31bab | 2014-02-18 14:11:28 +0800 | [diff] [blame] | 683 | static int write_buffer(int fd, off_t offset, const void *buf, size_t size) |
| 684 | { |
| 685 | size_t written_size; |
| 686 | MakedumpfileDataHeader mdh; |
| 687 | |
| 688 | mdh.offset = cpu_to_be64(offset); |
| 689 | mdh.buf_size = cpu_to_be64(size); |
| 690 | |
| 691 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 692 | if (written_size != sizeof(mdh)) { |
| 693 | return -1; |
| 694 | } |
| 695 | |
| 696 | written_size = qemu_write_full(fd, buf, size); |
| 697 | if (written_size != size) { |
| 698 | return -1; |
| 699 | } |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
qiaonuohan | 4835ef7 | 2014-02-18 14:11:29 +0800 | [diff] [blame] | 704 | static int buf_write_note(const void *buf, size_t size, void *opaque) |
| 705 | { |
| 706 | DumpState *s = opaque; |
| 707 | |
| 708 | /* note_buf is not enough */ |
| 709 | if (s->note_buf_offset + size > s->note_size) { |
| 710 | return -1; |
| 711 | } |
| 712 | |
| 713 | memcpy(s->note_buf + s->note_buf_offset, buf, size); |
| 714 | |
| 715 | s->note_buf_offset += size; |
| 716 | |
| 717 | return 0; |
| 718 | } |
| 719 | |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 720 | /* write common header, sub header and elf note to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 721 | static void create_header32(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 722 | { |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 723 | DiskDumpHeader32 *dh = NULL; |
| 724 | KdumpSubHeader32 *kh = NULL; |
| 725 | size_t size; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 726 | uint32_t block_size; |
| 727 | uint32_t sub_hdr_size; |
| 728 | uint32_t bitmap_blocks; |
| 729 | uint32_t status = 0; |
| 730 | uint64_t offset_note; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 731 | Error *local_err = NULL; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 732 | |
| 733 | /* write common header, the version of kdump-compressed format is 6th */ |
| 734 | size = sizeof(DiskDumpHeader32); |
| 735 | dh = g_malloc0(size); |
| 736 | |
| 737 | strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 738 | dh->header_version = cpu_to_dump32(s, 6); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 739 | block_size = TARGET_PAGE_SIZE; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 740 | dh->block_size = cpu_to_dump32(s, block_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 741 | sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size; |
| 742 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 743 | dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 744 | /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 745 | dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); |
| 746 | dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 747 | bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 748 | dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 749 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 750 | |
| 751 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 752 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 753 | } |
| 754 | #ifdef CONFIG_LZO |
| 755 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 756 | status |= DUMP_DH_COMPRESSED_LZO; |
| 757 | } |
| 758 | #endif |
| 759 | #ifdef CONFIG_SNAPPY |
| 760 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 761 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 762 | } |
| 763 | #endif |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 764 | dh->status = cpu_to_dump32(s, status); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 765 | |
| 766 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 767 | dump_error(s, "dump: failed to write disk dump header", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 768 | goto out; |
| 769 | } |
| 770 | |
| 771 | /* write sub header */ |
| 772 | size = sizeof(KdumpSubHeader32); |
| 773 | kh = g_malloc0(size); |
| 774 | |
| 775 | /* 64bit max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 776 | kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); |
| 777 | kh->phys_base = cpu_to_dump32(s, PHYS_BASE); |
| 778 | kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 779 | |
| 780 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 781 | kh->offset_note = cpu_to_dump64(s, offset_note); |
| 782 | kh->note_size = cpu_to_dump32(s, s->note_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 783 | |
| 784 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 785 | block_size, kh, size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 786 | dump_error(s, "dump: failed to write kdump sub header", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 787 | goto out; |
| 788 | } |
| 789 | |
| 790 | /* write note */ |
| 791 | s->note_buf = g_malloc0(s->note_size); |
| 792 | s->note_buf_offset = 0; |
| 793 | |
| 794 | /* use s->note_buf to store notes temporarily */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 795 | write_elf32_notes(buf_write_note, s, &local_err); |
| 796 | if (local_err) { |
| 797 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 798 | goto out; |
| 799 | } |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 800 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 801 | s->note_size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 802 | dump_error(s, "dump: failed to write notes", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 803 | goto out; |
| 804 | } |
| 805 | |
| 806 | /* get offset of dump_bitmap */ |
| 807 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 808 | block_size; |
| 809 | |
| 810 | /* get offset of page */ |
| 811 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 812 | block_size; |
| 813 | |
| 814 | out: |
| 815 | g_free(dh); |
| 816 | g_free(kh); |
| 817 | g_free(s->note_buf); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 818 | } |
| 819 | |
| 820 | /* write common header, sub header and elf note to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 821 | static void create_header64(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 822 | { |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 823 | DiskDumpHeader64 *dh = NULL; |
| 824 | KdumpSubHeader64 *kh = NULL; |
| 825 | size_t size; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 826 | uint32_t block_size; |
| 827 | uint32_t sub_hdr_size; |
| 828 | uint32_t bitmap_blocks; |
| 829 | uint32_t status = 0; |
| 830 | uint64_t offset_note; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 831 | Error *local_err = NULL; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 832 | |
| 833 | /* write common header, the version of kdump-compressed format is 6th */ |
| 834 | size = sizeof(DiskDumpHeader64); |
| 835 | dh = g_malloc0(size); |
| 836 | |
| 837 | strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 838 | dh->header_version = cpu_to_dump32(s, 6); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 839 | block_size = TARGET_PAGE_SIZE; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 840 | dh->block_size = cpu_to_dump32(s, block_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 841 | sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size; |
| 842 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 843 | dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 844 | /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 845 | dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); |
| 846 | dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 847 | bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 848 | dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 849 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 850 | |
| 851 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 852 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 853 | } |
| 854 | #ifdef CONFIG_LZO |
| 855 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 856 | status |= DUMP_DH_COMPRESSED_LZO; |
| 857 | } |
| 858 | #endif |
| 859 | #ifdef CONFIG_SNAPPY |
| 860 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 861 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 862 | } |
| 863 | #endif |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 864 | dh->status = cpu_to_dump32(s, status); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 865 | |
| 866 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 867 | dump_error(s, "dump: failed to write disk dump header", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 868 | goto out; |
| 869 | } |
| 870 | |
| 871 | /* write sub header */ |
| 872 | size = sizeof(KdumpSubHeader64); |
| 873 | kh = g_malloc0(size); |
| 874 | |
| 875 | /* 64bit max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 876 | kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); |
| 877 | kh->phys_base = cpu_to_dump64(s, PHYS_BASE); |
| 878 | kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 879 | |
| 880 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 881 | kh->offset_note = cpu_to_dump64(s, offset_note); |
| 882 | kh->note_size = cpu_to_dump64(s, s->note_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 883 | |
| 884 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 885 | block_size, kh, size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 886 | dump_error(s, "dump: failed to write kdump sub header", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 887 | goto out; |
| 888 | } |
| 889 | |
| 890 | /* write note */ |
| 891 | s->note_buf = g_malloc0(s->note_size); |
| 892 | s->note_buf_offset = 0; |
| 893 | |
| 894 | /* use s->note_buf to store notes temporarily */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 895 | write_elf64_notes(buf_write_note, s, &local_err); |
| 896 | if (local_err) { |
| 897 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 898 | goto out; |
| 899 | } |
| 900 | |
| 901 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 902 | s->note_size) < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 903 | dump_error(s, "dump: failed to write notes", errp); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 904 | goto out; |
| 905 | } |
| 906 | |
| 907 | /* get offset of dump_bitmap */ |
| 908 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 909 | block_size; |
| 910 | |
| 911 | /* get offset of page */ |
| 912 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 913 | block_size; |
| 914 | |
| 915 | out: |
| 916 | g_free(dh); |
| 917 | g_free(kh); |
| 918 | g_free(s->note_buf); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 919 | } |
| 920 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 921 | static void write_dump_header(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 922 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 923 | Error *local_err = NULL; |
| 924 | |
Laszlo Ersek | 24aeeac | 2014-05-20 13:39:45 +0200 | [diff] [blame] | 925 | if (s->dump_info.d_class == ELFCLASS32) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 926 | create_header32(s, &local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 927 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 928 | create_header64(s, &local_err); |
| 929 | } |
| 930 | if (local_err) { |
| 931 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 932 | } |
| 933 | } |
| 934 | |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 935 | /* |
| 936 | * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be |
| 937 | * rewritten, so if need to set the first bit, set last_pfn and pfn to 0. |
| 938 | * set_dump_bitmap will always leave the recently set bit un-sync. And setting |
| 939 | * (last bit + sizeof(buf) * 8) to 0 will do flushing the content in buf into |
| 940 | * vmcore, ie. synchronizing un-sync bit into vmcore. |
| 941 | */ |
| 942 | static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, |
| 943 | uint8_t *buf, DumpState *s) |
| 944 | { |
| 945 | off_t old_offset, new_offset; |
| 946 | off_t offset_bitmap1, offset_bitmap2; |
| 947 | uint32_t byte, bit; |
| 948 | |
| 949 | /* should not set the previous place */ |
| 950 | assert(last_pfn <= pfn); |
| 951 | |
| 952 | /* |
| 953 | * if the bit needed to be set is not cached in buf, flush the data in buf |
| 954 | * to vmcore firstly. |
| 955 | * making new_offset be bigger than old_offset can also sync remained data |
| 956 | * into vmcore. |
| 957 | */ |
| 958 | old_offset = BUFSIZE_BITMAP * (last_pfn / PFN_BUFBITMAP); |
| 959 | new_offset = BUFSIZE_BITMAP * (pfn / PFN_BUFBITMAP); |
| 960 | |
| 961 | while (old_offset < new_offset) { |
| 962 | /* calculate the offset and write dump_bitmap */ |
| 963 | offset_bitmap1 = s->offset_dump_bitmap + old_offset; |
| 964 | if (write_buffer(s->fd, offset_bitmap1, buf, |
| 965 | BUFSIZE_BITMAP) < 0) { |
| 966 | return -1; |
| 967 | } |
| 968 | |
| 969 | /* dump level 1 is chosen, so 1st and 2nd bitmap are same */ |
| 970 | offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap + |
| 971 | old_offset; |
| 972 | if (write_buffer(s->fd, offset_bitmap2, buf, |
| 973 | BUFSIZE_BITMAP) < 0) { |
| 974 | return -1; |
| 975 | } |
| 976 | |
| 977 | memset(buf, 0, BUFSIZE_BITMAP); |
| 978 | old_offset += BUFSIZE_BITMAP; |
| 979 | } |
| 980 | |
| 981 | /* get the exact place of the bit in the buf, and set it */ |
| 982 | byte = (pfn % PFN_BUFBITMAP) / CHAR_BIT; |
| 983 | bit = (pfn % PFN_BUFBITMAP) % CHAR_BIT; |
| 984 | if (value) { |
| 985 | buf[byte] |= 1u << bit; |
| 986 | } else { |
| 987 | buf[byte] &= ~(1u << bit); |
| 988 | } |
| 989 | |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * exam every page and return the page frame number and the address of the page. |
| 995 | * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys |
| 996 | * blocks, so block->target_start and block->target_end should be interal |
| 997 | * multiples of the target page size. |
| 998 | */ |
| 999 | static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, |
| 1000 | uint8_t **bufptr, DumpState *s) |
| 1001 | { |
| 1002 | GuestPhysBlock *block = *blockptr; |
| 1003 | hwaddr addr; |
| 1004 | uint8_t *buf; |
| 1005 | |
| 1006 | /* block == NULL means the start of the iteration */ |
| 1007 | if (!block) { |
| 1008 | block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
| 1009 | *blockptr = block; |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1010 | assert((block->target_start & ~TARGET_PAGE_MASK) == 0); |
| 1011 | assert((block->target_end & ~TARGET_PAGE_MASK) == 0); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1012 | *pfnptr = paddr_to_pfn(block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1013 | if (bufptr) { |
| 1014 | *bufptr = block->host_addr; |
| 1015 | } |
| 1016 | return true; |
| 1017 | } |
| 1018 | |
| 1019 | *pfnptr = *pfnptr + 1; |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1020 | addr = pfn_to_paddr(*pfnptr); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1021 | |
| 1022 | if ((addr >= block->target_start) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1023 | (addr + TARGET_PAGE_SIZE <= block->target_end)) { |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1024 | buf = block->host_addr + (addr - block->target_start); |
| 1025 | } else { |
| 1026 | /* the next page is in the next block */ |
| 1027 | block = QTAILQ_NEXT(block, next); |
| 1028 | *blockptr = block; |
| 1029 | if (!block) { |
| 1030 | return false; |
| 1031 | } |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1032 | assert((block->target_start & ~TARGET_PAGE_MASK) == 0); |
| 1033 | assert((block->target_end & ~TARGET_PAGE_MASK) == 0); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1034 | *pfnptr = paddr_to_pfn(block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1035 | buf = block->host_addr; |
| 1036 | } |
| 1037 | |
| 1038 | if (bufptr) { |
| 1039 | *bufptr = buf; |
| 1040 | } |
| 1041 | |
| 1042 | return true; |
| 1043 | } |
| 1044 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1045 | static void write_dump_bitmap(DumpState *s, Error **errp) |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1046 | { |
| 1047 | int ret = 0; |
| 1048 | uint64_t last_pfn, pfn; |
| 1049 | void *dump_bitmap_buf; |
| 1050 | size_t num_dumpable; |
| 1051 | GuestPhysBlock *block_iter = NULL; |
| 1052 | |
| 1053 | /* dump_bitmap_buf is used to store dump_bitmap temporarily */ |
| 1054 | dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP); |
| 1055 | |
| 1056 | num_dumpable = 0; |
| 1057 | last_pfn = 0; |
| 1058 | |
| 1059 | /* |
| 1060 | * exam memory page by page, and set the bit in dump_bitmap corresponded |
| 1061 | * to the existing page. |
| 1062 | */ |
| 1063 | while (get_next_page(&block_iter, &pfn, NULL, s)) { |
| 1064 | ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s); |
| 1065 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1066 | dump_error(s, "dump: failed to set dump_bitmap", errp); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1067 | goto out; |
| 1068 | } |
| 1069 | |
| 1070 | last_pfn = pfn; |
| 1071 | num_dumpable++; |
| 1072 | } |
| 1073 | |
| 1074 | /* |
| 1075 | * set_dump_bitmap will always leave the recently set bit un-sync. Here we |
| 1076 | * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be |
| 1077 | * synchronized into vmcore. |
| 1078 | */ |
| 1079 | if (num_dumpable > 0) { |
| 1080 | ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false, |
| 1081 | dump_bitmap_buf, s); |
| 1082 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1083 | dump_error(s, "dump: failed to sync dump_bitmap", errp); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1084 | goto out; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /* number of dumpable pages that will be dumped later */ |
| 1089 | s->num_dumpable = num_dumpable; |
| 1090 | |
| 1091 | out: |
| 1092 | g_free(dump_bitmap_buf); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1093 | } |
| 1094 | |
qiaonuohan | 64cfba6 | 2014-02-18 14:11:34 +0800 | [diff] [blame] | 1095 | static void prepare_data_cache(DataCache *data_cache, DumpState *s, |
| 1096 | off_t offset) |
| 1097 | { |
| 1098 | data_cache->fd = s->fd; |
| 1099 | data_cache->data_size = 0; |
| 1100 | data_cache->buf_size = BUFSIZE_DATA_CACHE; |
| 1101 | data_cache->buf = g_malloc0(BUFSIZE_DATA_CACHE); |
| 1102 | data_cache->offset = offset; |
| 1103 | } |
| 1104 | |
| 1105 | static int write_cache(DataCache *dc, const void *buf, size_t size, |
| 1106 | bool flag_sync) |
| 1107 | { |
| 1108 | /* |
| 1109 | * dc->buf_size should not be less than size, otherwise dc will never be |
| 1110 | * enough |
| 1111 | */ |
| 1112 | assert(size <= dc->buf_size); |
| 1113 | |
| 1114 | /* |
| 1115 | * if flag_sync is set, synchronize data in dc->buf into vmcore. |
| 1116 | * otherwise check if the space is enough for caching data in buf, if not, |
| 1117 | * write the data in dc->buf to dc->fd and reset dc->buf |
| 1118 | */ |
| 1119 | if ((!flag_sync && dc->data_size + size > dc->buf_size) || |
| 1120 | (flag_sync && dc->data_size > 0)) { |
| 1121 | if (write_buffer(dc->fd, dc->offset, dc->buf, dc->data_size) < 0) { |
| 1122 | return -1; |
| 1123 | } |
| 1124 | |
| 1125 | dc->offset += dc->data_size; |
| 1126 | dc->data_size = 0; |
| 1127 | } |
| 1128 | |
| 1129 | if (!flag_sync) { |
| 1130 | memcpy(dc->buf + dc->data_size, buf, size); |
| 1131 | dc->data_size += size; |
| 1132 | } |
| 1133 | |
| 1134 | return 0; |
| 1135 | } |
| 1136 | |
| 1137 | static void free_data_cache(DataCache *data_cache) |
| 1138 | { |
| 1139 | g_free(data_cache->buf); |
| 1140 | } |
| 1141 | |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1142 | static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress) |
| 1143 | { |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1144 | switch (flag_compress) { |
| 1145 | case DUMP_DH_COMPRESSED_ZLIB: |
| 1146 | return compressBound(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1147 | |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1148 | case DUMP_DH_COMPRESSED_LZO: |
| 1149 | /* |
| 1150 | * LZO will expand incompressible data by a little amount. Please check |
| 1151 | * the following URL to see the expansion calculation: |
| 1152 | * http://www.oberhumer.com/opensource/lzo/lzofaq.php |
| 1153 | */ |
| 1154 | return page_size + page_size / 16 + 64 + 3; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1155 | |
| 1156 | #ifdef CONFIG_SNAPPY |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1157 | case DUMP_DH_COMPRESSED_SNAPPY: |
| 1158 | return snappy_max_compressed_length(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1159 | #endif |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1160 | } |
| 1161 | return 0; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | /* |
| 1165 | * check if the page is all 0 |
| 1166 | */ |
| 1167 | static inline bool is_zero_page(const uint8_t *buf, size_t page_size) |
| 1168 | { |
| 1169 | return buffer_is_zero(buf, page_size); |
| 1170 | } |
| 1171 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1172 | static void write_dump_pages(DumpState *s, Error **errp) |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1173 | { |
| 1174 | int ret = 0; |
| 1175 | DataCache page_desc, page_data; |
| 1176 | size_t len_buf_out, size_out; |
| 1177 | #ifdef CONFIG_LZO |
| 1178 | lzo_bytep wrkmem = NULL; |
| 1179 | #endif |
| 1180 | uint8_t *buf_out = NULL; |
| 1181 | off_t offset_desc, offset_data; |
| 1182 | PageDescriptor pd, pd_zero; |
| 1183 | uint8_t *buf; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1184 | GuestPhysBlock *block_iter = NULL; |
| 1185 | uint64_t pfn_iter; |
| 1186 | |
| 1187 | /* get offset of page_desc and page_data in dump file */ |
| 1188 | offset_desc = s->offset_page; |
| 1189 | offset_data = offset_desc + sizeof(PageDescriptor) * s->num_dumpable; |
| 1190 | |
| 1191 | prepare_data_cache(&page_desc, s, offset_desc); |
| 1192 | prepare_data_cache(&page_data, s, offset_data); |
| 1193 | |
| 1194 | /* prepare buffer to store compressed data */ |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1195 | 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] | 1196 | assert(len_buf_out != 0); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1197 | |
| 1198 | #ifdef CONFIG_LZO |
| 1199 | wrkmem = g_malloc(LZO1X_1_MEM_COMPRESS); |
| 1200 | #endif |
| 1201 | |
| 1202 | buf_out = g_malloc(len_buf_out); |
| 1203 | |
| 1204 | /* |
| 1205 | * init zero page's page_desc and page_data, because every zero page |
| 1206 | * uses the same page_data |
| 1207 | */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1208 | pd_zero.size = cpu_to_dump32(s, TARGET_PAGE_SIZE); |
| 1209 | pd_zero.flags = cpu_to_dump32(s, 0); |
| 1210 | pd_zero.offset = cpu_to_dump64(s, offset_data); |
| 1211 | pd_zero.page_flags = cpu_to_dump64(s, 0); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1212 | buf = g_malloc0(TARGET_PAGE_SIZE); |
| 1213 | ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1214 | g_free(buf); |
| 1215 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1216 | dump_error(s, "dump: failed to write page data (zero page)", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1217 | goto out; |
| 1218 | } |
| 1219 | |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1220 | offset_data += TARGET_PAGE_SIZE; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1221 | |
| 1222 | /* |
| 1223 | * dump memory to vmcore page by page. zero page will all be resided in the |
| 1224 | * first page of page section |
| 1225 | */ |
| 1226 | while (get_next_page(&block_iter, &pfn_iter, &buf, s)) { |
| 1227 | /* check zero page */ |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1228 | if (is_zero_page(buf, TARGET_PAGE_SIZE)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1229 | ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor), |
| 1230 | false); |
| 1231 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1232 | dump_error(s, "dump: failed to write page desc", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1233 | goto out; |
| 1234 | } |
| 1235 | } else { |
| 1236 | /* |
| 1237 | * not zero page, then: |
| 1238 | * 1. compress the page |
| 1239 | * 2. write the compressed page into the cache of page_data |
| 1240 | * 3. get page desc of the compressed page and write it into the |
| 1241 | * cache of page_desc |
| 1242 | * |
| 1243 | * only one compression format will be used here, for |
| 1244 | * s->flag_compress is set. But when compression fails to work, |
| 1245 | * we fall back to save in plaintext. |
| 1246 | */ |
| 1247 | size_out = len_buf_out; |
| 1248 | if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) && |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1249 | (compress2(buf_out, (uLongf *)&size_out, buf, |
| 1250 | TARGET_PAGE_SIZE, Z_BEST_SPEED) == Z_OK) && |
| 1251 | (size_out < TARGET_PAGE_SIZE)) { |
| 1252 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_ZLIB); |
| 1253 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1254 | |
| 1255 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1256 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1257 | dump_error(s, "dump: failed to write page data", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1258 | goto out; |
| 1259 | } |
| 1260 | #ifdef CONFIG_LZO |
| 1261 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1262 | (lzo1x_1_compress(buf, TARGET_PAGE_SIZE, buf_out, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1263 | (lzo_uint *)&size_out, wrkmem) == LZO_E_OK) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1264 | (size_out < TARGET_PAGE_SIZE)) { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1265 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_LZO); |
| 1266 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1267 | |
| 1268 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1269 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1270 | dump_error(s, "dump: failed to write page data", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1271 | goto out; |
| 1272 | } |
| 1273 | #endif |
| 1274 | #ifdef CONFIG_SNAPPY |
| 1275 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1276 | (snappy_compress((char *)buf, TARGET_PAGE_SIZE, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1277 | (char *)buf_out, &size_out) == SNAPPY_OK) && |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1278 | (size_out < TARGET_PAGE_SIZE)) { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1279 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_SNAPPY); |
| 1280 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1281 | |
| 1282 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1283 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1284 | dump_error(s, "dump: failed to write page data", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1285 | goto out; |
| 1286 | } |
| 1287 | #endif |
| 1288 | } else { |
| 1289 | /* |
| 1290 | * fall back to save in plaintext, size_out should be |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1291 | * assigned TARGET_PAGE_SIZE |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1292 | */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1293 | pd.flags = cpu_to_dump32(s, 0); |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1294 | size_out = TARGET_PAGE_SIZE; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1295 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1296 | |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1297 | ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1298 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1299 | dump_error(s, "dump: failed to write page data", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1300 | goto out; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | /* get and write page desc here */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1305 | pd.page_flags = cpu_to_dump64(s, 0); |
| 1306 | pd.offset = cpu_to_dump64(s, offset_data); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1307 | offset_data += size_out; |
| 1308 | |
| 1309 | ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false); |
| 1310 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1311 | dump_error(s, "dump: failed to write page desc", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1312 | goto out; |
| 1313 | } |
| 1314 | } |
| 1315 | } |
| 1316 | |
| 1317 | ret = write_cache(&page_desc, NULL, 0, true); |
| 1318 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1319 | dump_error(s, "dump: failed to sync cache for page_desc", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1320 | goto out; |
| 1321 | } |
| 1322 | ret = write_cache(&page_data, NULL, 0, true); |
| 1323 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1324 | dump_error(s, "dump: failed to sync cache for page_data", errp); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1325 | goto out; |
| 1326 | } |
| 1327 | |
| 1328 | out: |
| 1329 | free_data_cache(&page_desc); |
| 1330 | free_data_cache(&page_data); |
| 1331 | |
| 1332 | #ifdef CONFIG_LZO |
| 1333 | g_free(wrkmem); |
| 1334 | #endif |
| 1335 | |
| 1336 | g_free(buf_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1337 | } |
| 1338 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1339 | static void create_kdump_vmcore(DumpState *s, Error **errp) |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1340 | { |
| 1341 | int ret; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1342 | Error *local_err = NULL; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1343 | |
| 1344 | /* |
| 1345 | * the kdump-compressed format is: |
| 1346 | * File offset |
| 1347 | * +------------------------------------------+ 0x0 |
| 1348 | * | main header (struct disk_dump_header) | |
| 1349 | * |------------------------------------------+ block 1 |
| 1350 | * | sub header (struct kdump_sub_header) | |
| 1351 | * |------------------------------------------+ block 2 |
| 1352 | * | 1st-dump_bitmap | |
| 1353 | * |------------------------------------------+ block 2 + X blocks |
| 1354 | * | 2nd-dump_bitmap | (aligned by block) |
| 1355 | * |------------------------------------------+ block 2 + 2 * X blocks |
| 1356 | * | page desc for pfn 0 (struct page_desc) | (aligned by block) |
| 1357 | * | page desc for pfn 1 (struct page_desc) | |
| 1358 | * | : | |
| 1359 | * |------------------------------------------| (not aligned by block) |
| 1360 | * | page data (pfn 0) | |
| 1361 | * | page data (pfn 1) | |
| 1362 | * | : | |
| 1363 | * +------------------------------------------+ |
| 1364 | */ |
| 1365 | |
| 1366 | ret = write_start_flat_header(s->fd); |
| 1367 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1368 | dump_error(s, "dump: failed to write start flat header", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1369 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1370 | } |
| 1371 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1372 | write_dump_header(s, &local_err); |
| 1373 | if (local_err) { |
| 1374 | error_propagate(errp, local_err); |
| 1375 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1376 | } |
| 1377 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1378 | write_dump_bitmap(s, &local_err); |
| 1379 | if (local_err) { |
| 1380 | error_propagate(errp, local_err); |
| 1381 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1382 | } |
| 1383 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1384 | write_dump_pages(s, &local_err); |
| 1385 | if (local_err) { |
| 1386 | error_propagate(errp, local_err); |
| 1387 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1388 | } |
| 1389 | |
| 1390 | ret = write_end_flat_header(s->fd); |
| 1391 | if (ret < 0) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1392 | dump_error(s, "dump: failed to write end flat header", errp); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1393 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1394 | } |
| 1395 | |
| 1396 | dump_completed(s); |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1397 | } |
| 1398 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1399 | static ram_addr_t get_start_block(DumpState *s) |
| 1400 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1401 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1402 | |
| 1403 | if (!s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1404 | s->next_block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1405 | return 0; |
| 1406 | } |
| 1407 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1408 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
| 1409 | if (block->target_start >= s->begin + s->length || |
| 1410 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1411 | /* This block is out of the range */ |
| 1412 | continue; |
| 1413 | } |
| 1414 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1415 | s->next_block = block; |
| 1416 | if (s->begin > block->target_start) { |
| 1417 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1418 | } else { |
| 1419 | s->start = 0; |
| 1420 | } |
| 1421 | return s->start; |
| 1422 | } |
| 1423 | |
| 1424 | return -1; |
| 1425 | } |
| 1426 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1427 | static void get_max_mapnr(DumpState *s) |
| 1428 | { |
| 1429 | GuestPhysBlock *last_block; |
| 1430 | |
| 1431 | last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead); |
Laszlo Ersek | 22227f1 | 2014-05-20 13:39:43 +0200 | [diff] [blame] | 1432 | s->max_mapnr = paddr_to_pfn(last_block->target_end); |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1433 | } |
| 1434 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1435 | static void dump_init(DumpState *s, int fd, bool has_format, |
| 1436 | DumpGuestMemoryFormat format, bool paging, bool has_filter, |
| 1437 | int64_t begin, int64_t length, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1438 | { |
Andreas Färber | 182735e | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 1439 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1440 | int nr_cpus; |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1441 | Error *err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1442 | int ret; |
| 1443 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1444 | /* kdump-compressed is conflict with paging and filter */ |
| 1445 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1446 | assert(!paging && !has_filter); |
| 1447 | } |
| 1448 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1449 | if (runstate_is_running()) { |
| 1450 | vm_stop(RUN_STATE_SAVE_VM); |
| 1451 | s->resume = true; |
| 1452 | } else { |
| 1453 | s->resume = false; |
| 1454 | } |
| 1455 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1456 | /* If we use KVM, we should synchronize the registers before we get dump |
| 1457 | * info or physmap info. |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1458 | */ |
Andreas Färber | 1b3509c | 2013-06-09 16:48:29 +0200 | [diff] [blame] | 1459 | cpu_synchronize_all_states(); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1460 | nr_cpus = 0; |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 1461 | CPU_FOREACH(cpu) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1462 | nr_cpus++; |
| 1463 | } |
| 1464 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1465 | s->fd = fd; |
| 1466 | s->has_filter = has_filter; |
| 1467 | s->begin = begin; |
| 1468 | s->length = length; |
| 1469 | |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 1470 | memory_mapping_list_init(&s->list); |
| 1471 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1472 | guest_phys_blocks_init(&s->guest_phys_blocks); |
Laszlo Ersek | c5d7f60 | 2013-08-06 12:37:10 +0200 | [diff] [blame] | 1473 | guest_phys_blocks_append(&s->guest_phys_blocks); |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1474 | |
| 1475 | s->start = get_start_block(s); |
| 1476 | if (s->start == -1) { |
| 1477 | error_set(errp, QERR_INVALID_PARAMETER, "begin"); |
| 1478 | goto cleanup; |
| 1479 | } |
| 1480 | |
| 1481 | /* get dump info: endian, class and architecture. |
| 1482 | * If the target architecture is not supported, cpu_get_dump_info() will |
| 1483 | * return -1. |
| 1484 | */ |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1485 | ret = cpu_get_dump_info(&s->dump_info, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1486 | if (ret < 0) { |
| 1487 | error_set(errp, QERR_UNSUPPORTED); |
| 1488 | goto cleanup; |
| 1489 | } |
| 1490 | |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1491 | s->note_size = cpu_get_note_size(s->dump_info.d_class, |
| 1492 | s->dump_info.d_machine, nr_cpus); |
Aneesh Kumar K.V | bb6b684 | 2013-10-01 21:49:32 +0530 | [diff] [blame] | 1493 | if (s->note_size < 0) { |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1494 | error_set(errp, QERR_UNSUPPORTED); |
| 1495 | goto cleanup; |
| 1496 | } |
| 1497 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1498 | /* get memory mapping */ |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1499 | if (paging) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1500 | qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err); |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1501 | if (err != NULL) { |
| 1502 | error_propagate(errp, err); |
| 1503 | goto cleanup; |
| 1504 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1505 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1506 | qemu_get_guest_simple_memory_mapping(&s->list, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1507 | } |
| 1508 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1509 | s->nr_cpus = nr_cpus; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1510 | |
| 1511 | get_max_mapnr(s); |
| 1512 | |
| 1513 | uint64_t tmp; |
Laszlo Ersek | 2f859f8 | 2014-05-20 13:39:44 +0200 | [diff] [blame] | 1514 | tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), TARGET_PAGE_SIZE); |
| 1515 | s->len_dump_bitmap = tmp * TARGET_PAGE_SIZE; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1516 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1517 | /* init for kdump-compressed format */ |
| 1518 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1519 | switch (format) { |
| 1520 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB: |
| 1521 | s->flag_compress = DUMP_DH_COMPRESSED_ZLIB; |
| 1522 | break; |
| 1523 | |
| 1524 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO: |
Laszlo Ersek | c998acb | 2014-05-20 13:42:22 +0200 | [diff] [blame] | 1525 | #ifdef CONFIG_LZO |
| 1526 | if (lzo_init() != LZO_E_OK) { |
| 1527 | error_setg(errp, "failed to initialize the LZO library"); |
| 1528 | goto cleanup; |
| 1529 | } |
| 1530 | #endif |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1531 | s->flag_compress = DUMP_DH_COMPRESSED_LZO; |
| 1532 | break; |
| 1533 | |
| 1534 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY: |
| 1535 | s->flag_compress = DUMP_DH_COMPRESSED_SNAPPY; |
| 1536 | break; |
| 1537 | |
| 1538 | default: |
| 1539 | s->flag_compress = 0; |
| 1540 | } |
| 1541 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1542 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1543 | } |
| 1544 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1545 | if (s->has_filter) { |
| 1546 | memory_mapping_filter(&s->list, s->begin, s->length); |
| 1547 | } |
| 1548 | |
| 1549 | /* |
| 1550 | * calculate phdr_num |
| 1551 | * |
| 1552 | * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow |
| 1553 | */ |
| 1554 | s->phdr_num = 1; /* PT_NOTE */ |
| 1555 | if (s->list.num < UINT16_MAX - 2) { |
| 1556 | s->phdr_num += s->list.num; |
| 1557 | s->have_section = false; |
| 1558 | } else { |
| 1559 | s->have_section = true; |
| 1560 | s->phdr_num = PN_XNUM; |
| 1561 | s->sh_info = 1; /* PT_NOTE */ |
| 1562 | |
| 1563 | /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */ |
| 1564 | if (s->list.num <= UINT32_MAX - 1) { |
| 1565 | s->sh_info += s->list.num; |
| 1566 | } else { |
| 1567 | s->sh_info = UINT32_MAX; |
| 1568 | } |
| 1569 | } |
| 1570 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1571 | if (s->dump_info.d_class == ELFCLASS64) { |
| 1572 | if (s->have_section) { |
| 1573 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1574 | sizeof(Elf64_Phdr) * s->sh_info + |
| 1575 | sizeof(Elf64_Shdr) + s->note_size; |
| 1576 | } else { |
| 1577 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1578 | sizeof(Elf64_Phdr) * s->phdr_num + s->note_size; |
| 1579 | } |
| 1580 | } else { |
| 1581 | if (s->have_section) { |
| 1582 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1583 | sizeof(Elf32_Phdr) * s->sh_info + |
| 1584 | sizeof(Elf32_Shdr) + s->note_size; |
| 1585 | } else { |
| 1586 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1587 | sizeof(Elf32_Phdr) * s->phdr_num + s->note_size; |
| 1588 | } |
| 1589 | } |
| 1590 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1591 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1592 | |
| 1593 | cleanup: |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 1594 | dump_cleanup(s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1595 | } |
| 1596 | |
| 1597 | void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1598 | int64_t begin, bool has_length, |
| 1599 | int64_t length, bool has_format, |
| 1600 | DumpGuestMemoryFormat format, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1601 | { |
| 1602 | const char *p; |
| 1603 | int fd = -1; |
| 1604 | DumpState *s; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1605 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1606 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1607 | /* |
| 1608 | * kdump-compressed format need the whole memory dumped, so paging or |
| 1609 | * filter is not supported here. |
| 1610 | */ |
| 1611 | if ((has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) && |
| 1612 | (paging || has_begin || has_length)) { |
| 1613 | error_setg(errp, "kdump-compressed format doesn't support paging or " |
| 1614 | "filter"); |
| 1615 | return; |
| 1616 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1617 | if (has_begin && !has_length) { |
| 1618 | error_set(errp, QERR_MISSING_PARAMETER, "length"); |
| 1619 | return; |
| 1620 | } |
| 1621 | if (!has_begin && has_length) { |
| 1622 | error_set(errp, QERR_MISSING_PARAMETER, "begin"); |
| 1623 | return; |
| 1624 | } |
| 1625 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1626 | /* check whether lzo/snappy is supported */ |
| 1627 | #ifndef CONFIG_LZO |
| 1628 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO) { |
| 1629 | error_setg(errp, "kdump-lzo is not available now"); |
| 1630 | return; |
| 1631 | } |
| 1632 | #endif |
| 1633 | |
| 1634 | #ifndef CONFIG_SNAPPY |
| 1635 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY) { |
| 1636 | error_setg(errp, "kdump-snappy is not available now"); |
| 1637 | return; |
| 1638 | } |
| 1639 | #endif |
| 1640 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1641 | #if !defined(WIN32) |
| 1642 | if (strstart(file, "fd:", &p)) { |
Paolo Bonzini | a9940fc | 2012-09-20 16:50:32 +0200 | [diff] [blame] | 1643 | fd = monitor_get_fd(cur_mon, p, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1644 | if (fd == -1) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1645 | return; |
| 1646 | } |
| 1647 | } |
| 1648 | #endif |
| 1649 | |
| 1650 | if (strstart(file, "file:", &p)) { |
| 1651 | fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR); |
| 1652 | if (fd < 0) { |
Luiz Capitulino | 7581766 | 2013-06-07 14:36:01 -0400 | [diff] [blame] | 1653 | error_setg_file_open(errp, errno, p); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1654 | return; |
| 1655 | } |
| 1656 | } |
| 1657 | |
| 1658 | if (fd == -1) { |
| 1659 | error_set(errp, QERR_INVALID_PARAMETER, "protocol"); |
| 1660 | return; |
| 1661 | } |
| 1662 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1663 | s = g_malloc0(sizeof(DumpState)); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1664 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1665 | dump_init(s, fd, has_format, format, paging, has_begin, |
| 1666 | begin, length, &local_err); |
| 1667 | if (local_err) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1668 | g_free(s); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1669 | error_propagate(errp, local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1670 | return; |
| 1671 | } |
| 1672 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1673 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1674 | create_kdump_vmcore(s, errp); |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1675 | } else { |
zhanghailiang | 37917da | 2014-10-09 14:13:10 +0800 | [diff] [blame] | 1676 | create_vmcore(s, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1677 | } |
| 1678 | |
| 1679 | g_free(s); |
| 1680 | } |
qiaonuohan | 7d6dc7f | 2014-02-18 14:11:38 +0800 | [diff] [blame] | 1681 | |
| 1682 | DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp) |
| 1683 | { |
| 1684 | DumpGuestMemoryFormatList *item; |
| 1685 | DumpGuestMemoryCapability *cap = |
| 1686 | g_malloc0(sizeof(DumpGuestMemoryCapability)); |
| 1687 | |
| 1688 | /* elf is always available */ |
| 1689 | item = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1690 | cap->formats = item; |
| 1691 | item->value = DUMP_GUEST_MEMORY_FORMAT_ELF; |
| 1692 | |
| 1693 | /* kdump-zlib is always available */ |
| 1694 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1695 | item = item->next; |
| 1696 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB; |
| 1697 | |
| 1698 | /* add new item if kdump-lzo is available */ |
| 1699 | #ifdef CONFIG_LZO |
| 1700 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1701 | item = item->next; |
| 1702 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO; |
| 1703 | #endif |
| 1704 | |
| 1705 | /* add new item if kdump-snappy is available */ |
| 1706 | #ifdef CONFIG_SNAPPY |
| 1707 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 1708 | item = item->next; |
| 1709 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY; |
| 1710 | #endif |
| 1711 | |
| 1712 | return cap; |
| 1713 | } |