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 | |
Peter Maydell | d38ea87 | 2016-01-29 17:50:05 +0000 | [diff] [blame] | 14 | #include "qemu/osdep.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 15 | #include "qemu/cutils.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 16 | #include "elf.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 17 | #include "cpu.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 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" |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 25 | #include "qapi/error.h" |
Markus Armbruster | 112ed24 | 2018-02-26 17:13:27 -0600 | [diff] [blame] | 26 | #include "qapi/qapi-commands-misc.h" |
| 27 | #include "qapi/qapi-events-misc.h" |
Markus Armbruster | cc7a8ea | 2015-03-17 17:22:46 +0100 | [diff] [blame] | 28 | #include "qapi/qmp/qerror.h" |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 29 | #include "qemu/error-report.h" |
| 30 | #include "hw/misc/vmcoreinfo.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 31 | |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 32 | #include <zlib.h> |
| 33 | #ifdef CONFIG_LZO |
| 34 | #include <lzo/lzo1x.h> |
| 35 | #endif |
| 36 | #ifdef CONFIG_SNAPPY |
| 37 | #include <snappy-c.h> |
| 38 | #endif |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 39 | #ifndef ELF_MACHINE_UNAME |
| 40 | #define ELF_MACHINE_UNAME "Unknown" |
| 41 | #endif |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 42 | |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 43 | #define MAX_GUEST_NOTE_SIZE (1 << 20) /* 1MB should be enough */ |
| 44 | |
| 45 | #define ELF_NOTE_SIZE(hdr_size, name_size, desc_size) \ |
| 46 | ((DIV_ROUND_UP((hdr_size), 4) + \ |
| 47 | DIV_ROUND_UP((name_size), 4) + \ |
| 48 | DIV_ROUND_UP((desc_size), 4)) * 4) |
| 49 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 50 | uint16_t cpu_to_dump16(DumpState *s, uint16_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_le16(val); |
| 54 | } else { |
| 55 | val = cpu_to_be16(val); |
| 56 | } |
| 57 | |
| 58 | return val; |
| 59 | } |
| 60 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 61 | uint32_t cpu_to_dump32(DumpState *s, uint32_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_le32(val); |
| 65 | } else { |
| 66 | val = cpu_to_be32(val); |
| 67 | } |
| 68 | |
| 69 | return val; |
| 70 | } |
| 71 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 72 | uint64_t cpu_to_dump64(DumpState *s, uint64_t val) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 73 | { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 74 | if (s->dump_info.d_endian == ELFDATA2LSB) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 75 | val = cpu_to_le64(val); |
| 76 | } else { |
| 77 | val = cpu_to_be64(val); |
| 78 | } |
| 79 | |
| 80 | return val; |
| 81 | } |
| 82 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 83 | static int dump_cleanup(DumpState *s) |
| 84 | { |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 85 | guest_phys_blocks_free(&s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 86 | memory_mapping_list_free(&s->list); |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 87 | close(s->fd); |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 88 | g_free(s->guest_note); |
| 89 | s->guest_note = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 90 | if (s->resume) { |
Fam Zheng | 6796b40 | 2017-05-03 15:28:19 +0800 | [diff] [blame] | 91 | if (s->detached) { |
| 92 | qemu_mutex_lock_iothread(); |
| 93 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 94 | vm_start(); |
Fam Zheng | 6796b40 | 2017-05-03 15:28:19 +0800 | [diff] [blame] | 95 | if (s->detached) { |
| 96 | qemu_mutex_unlock_iothread(); |
| 97 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 98 | } |
| 99 | |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 100 | return 0; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 101 | } |
| 102 | |
qiaonuohan | b5ba1cc | 2014-02-18 14:11:25 +0800 | [diff] [blame] | 103 | 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] | 104 | { |
| 105 | DumpState *s = opaque; |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 106 | size_t written_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 107 | |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 108 | written_size = qemu_write_full(s->fd, buf, size); |
| 109 | if (written_size != size) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 110 | return -errno; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 116 | static void write_elf64_header(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 117 | { |
| 118 | Elf64_Ehdr elf_header; |
| 119 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 120 | |
| 121 | memset(&elf_header, 0, sizeof(Elf64_Ehdr)); |
| 122 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 123 | elf_header.e_ident[EI_CLASS] = ELFCLASS64; |
| 124 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
| 125 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 126 | elf_header.e_type = cpu_to_dump16(s, ET_CORE); |
| 127 | elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); |
| 128 | elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); |
| 129 | elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); |
| 130 | elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr)); |
| 131 | elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr)); |
| 132 | elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 133 | if (s->have_section) { |
| 134 | uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; |
| 135 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 136 | elf_header.e_shoff = cpu_to_dump64(s, shoff); |
| 137 | elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr)); |
| 138 | elf_header.e_shnum = cpu_to_dump16(s, 1); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 142 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 143 | error_setg_errno(errp, -ret, "dump: failed to write elf header"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 144 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 145 | } |
| 146 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 147 | static void write_elf32_header(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 148 | { |
| 149 | Elf32_Ehdr elf_header; |
| 150 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 151 | |
| 152 | memset(&elf_header, 0, sizeof(Elf32_Ehdr)); |
| 153 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 154 | elf_header.e_ident[EI_CLASS] = ELFCLASS32; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 155 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 156 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 157 | elf_header.e_type = cpu_to_dump16(s, ET_CORE); |
| 158 | elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); |
| 159 | elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); |
| 160 | elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); |
| 161 | elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr)); |
| 162 | elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr)); |
| 163 | elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 164 | if (s->have_section) { |
| 165 | uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; |
| 166 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 167 | elf_header.e_shoff = cpu_to_dump32(s, shoff); |
| 168 | elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr)); |
| 169 | elf_header.e_shnum = cpu_to_dump16(s, 1); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 173 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 174 | error_setg_errno(errp, -ret, "dump: failed to write elf header"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 175 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 176 | } |
| 177 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 178 | static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, |
| 179 | int phdr_index, hwaddr offset, |
| 180 | hwaddr filesz, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 181 | { |
| 182 | Elf64_Phdr phdr; |
| 183 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 184 | |
| 185 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 186 | phdr.p_type = cpu_to_dump32(s, PT_LOAD); |
| 187 | phdr.p_offset = cpu_to_dump64(s, offset); |
| 188 | phdr.p_paddr = cpu_to_dump64(s, memory_mapping->phys_addr); |
| 189 | phdr.p_filesz = cpu_to_dump64(s, filesz); |
| 190 | phdr.p_memsz = cpu_to_dump64(s, memory_mapping->length); |
| 191 | phdr.p_vaddr = cpu_to_dump64(s, memory_mapping->virt_addr); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 192 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 193 | assert(memory_mapping->length >= filesz); |
| 194 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 195 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 196 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 197 | error_setg_errno(errp, -ret, |
| 198 | "dump: failed to write program header table"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 199 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 200 | } |
| 201 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 202 | static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, |
| 203 | int phdr_index, hwaddr offset, |
| 204 | hwaddr filesz, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 205 | { |
| 206 | Elf32_Phdr phdr; |
| 207 | int ret; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 208 | |
| 209 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 210 | phdr.p_type = cpu_to_dump32(s, PT_LOAD); |
| 211 | phdr.p_offset = cpu_to_dump32(s, offset); |
| 212 | phdr.p_paddr = cpu_to_dump32(s, memory_mapping->phys_addr); |
| 213 | phdr.p_filesz = cpu_to_dump32(s, filesz); |
| 214 | phdr.p_memsz = cpu_to_dump32(s, memory_mapping->length); |
| 215 | phdr.p_vaddr = cpu_to_dump32(s, memory_mapping->virt_addr); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 216 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 217 | assert(memory_mapping->length >= filesz); |
| 218 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 219 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 220 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 221 | error_setg_errno(errp, -ret, |
| 222 | "dump: failed to write program header table"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 223 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 224 | } |
| 225 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 226 | static void write_elf64_note(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 227 | { |
| 228 | Elf64_Phdr phdr; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 229 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 230 | int ret; |
| 231 | |
| 232 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 233 | phdr.p_type = cpu_to_dump32(s, PT_NOTE); |
| 234 | phdr.p_offset = cpu_to_dump64(s, begin); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 235 | phdr.p_paddr = 0; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 236 | phdr.p_filesz = cpu_to_dump64(s, s->note_size); |
| 237 | phdr.p_memsz = cpu_to_dump64(s, s->note_size); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 238 | phdr.p_vaddr = 0; |
| 239 | |
| 240 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 241 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 242 | error_setg_errno(errp, -ret, |
| 243 | "dump: failed to write program header table"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 244 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 245 | } |
| 246 | |
Paolo Bonzini | 0bc3cd6 | 2013-04-08 17:29:59 +0200 | [diff] [blame] | 247 | static inline int cpu_index(CPUState *cpu) |
| 248 | { |
| 249 | return cpu->cpu_index + 1; |
| 250 | } |
| 251 | |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 252 | static void write_guest_note(WriteCoreDumpFunction f, DumpState *s, |
| 253 | Error **errp) |
| 254 | { |
| 255 | int ret; |
| 256 | |
| 257 | if (s->guest_note) { |
| 258 | ret = f(s->guest_note, s->guest_note_size, s); |
| 259 | if (ret < 0) { |
| 260 | error_setg(errp, "dump: failed to write guest note"); |
| 261 | } |
| 262 | } |
| 263 | } |
| 264 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 265 | static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s, |
| 266 | Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 267 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 268 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 269 | int ret; |
| 270 | int id; |
| 271 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 272 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 273 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 274 | ret = cpu_write_elf64_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 275 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 276 | error_setg(errp, "dump: failed to write elf notes"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 277 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 278 | } |
| 279 | } |
| 280 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 281 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 282 | ret = cpu_write_elf64_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 283 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 284 | error_setg(errp, "dump: failed to write CPU status"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 285 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 286 | } |
| 287 | } |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 288 | |
| 289 | write_guest_note(f, s, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 290 | } |
| 291 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 292 | static void write_elf32_note(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 293 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 294 | hwaddr begin = s->memory_offset - s->note_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 295 | Elf32_Phdr phdr; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 296 | int ret; |
| 297 | |
| 298 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 299 | phdr.p_type = cpu_to_dump32(s, PT_NOTE); |
| 300 | phdr.p_offset = cpu_to_dump32(s, begin); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 301 | phdr.p_paddr = 0; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 302 | phdr.p_filesz = cpu_to_dump32(s, s->note_size); |
| 303 | phdr.p_memsz = cpu_to_dump32(s, s->note_size); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 304 | phdr.p_vaddr = 0; |
| 305 | |
| 306 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 307 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 308 | error_setg_errno(errp, -ret, |
| 309 | "dump: failed to write program header table"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 310 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 311 | } |
| 312 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 313 | static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s, |
| 314 | Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 315 | { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 316 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 317 | int ret; |
| 318 | int id; |
| 319 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 320 | CPU_FOREACH(cpu) { |
Andreas Färber | 0d34282 | 2012-12-17 07:12:13 +0100 | [diff] [blame] | 321 | id = cpu_index(cpu); |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 322 | ret = cpu_write_elf32_note(f, cpu, id, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 323 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 324 | error_setg(errp, "dump: failed to write elf notes"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 325 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 326 | } |
| 327 | } |
| 328 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 329 | CPU_FOREACH(cpu) { |
qiaonuohan | 6a51991 | 2014-02-18 14:11:26 +0800 | [diff] [blame] | 330 | ret = cpu_write_elf32_qemunote(f, cpu, s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 331 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 332 | error_setg(errp, "dump: failed to write CPU status"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 333 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 334 | } |
| 335 | } |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 336 | |
| 337 | write_guest_note(f, s, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 338 | } |
| 339 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 340 | static void write_elf_section(DumpState *s, int type, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 341 | { |
| 342 | Elf32_Shdr shdr32; |
| 343 | Elf64_Shdr shdr64; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 344 | int shdr_size; |
| 345 | void *shdr; |
| 346 | int ret; |
| 347 | |
| 348 | if (type == 0) { |
| 349 | shdr_size = sizeof(Elf32_Shdr); |
| 350 | memset(&shdr32, 0, shdr_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 351 | shdr32.sh_info = cpu_to_dump32(s, s->sh_info); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 352 | shdr = &shdr32; |
| 353 | } else { |
| 354 | shdr_size = sizeof(Elf64_Shdr); |
| 355 | memset(&shdr64, 0, shdr_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 356 | shdr64.sh_info = cpu_to_dump32(s, s->sh_info); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 357 | shdr = &shdr64; |
| 358 | } |
| 359 | |
| 360 | ret = fd_write_vmcore(&shdr, shdr_size, s); |
| 361 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 362 | error_setg_errno(errp, -ret, |
| 363 | "dump: failed to write section header table"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 364 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 365 | } |
| 366 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 367 | static void write_data(DumpState *s, void *buf, int length, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 368 | { |
| 369 | int ret; |
| 370 | |
| 371 | ret = fd_write_vmcore(buf, length, s); |
| 372 | if (ret < 0) { |
Yasmin Beatriz | 0c33659 | 2018-02-12 12:25:06 -0200 | [diff] [blame] | 373 | error_setg_errno(errp, -ret, "dump: failed to save memory"); |
Peter Xu | 2264c2c | 2016-02-18 13:16:53 +0800 | [diff] [blame] | 374 | } else { |
| 375 | s->written_size += length; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 376 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 377 | } |
| 378 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 379 | /* write the memory to vmcore. 1 page per I/O. */ |
| 380 | static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, |
| 381 | int64_t size, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 382 | { |
| 383 | int64_t i; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 384 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 385 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 386 | for (i = 0; i < size / s->dump_info.page_size; i++) { |
| 387 | write_data(s, block->host_addr + start + i * s->dump_info.page_size, |
| 388 | s->dump_info.page_size, &local_err); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 389 | if (local_err) { |
| 390 | error_propagate(errp, local_err); |
| 391 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 392 | } |
| 393 | } |
| 394 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 395 | if ((size % s->dump_info.page_size) != 0) { |
| 396 | write_data(s, block->host_addr + start + i * s->dump_info.page_size, |
| 397 | size % s->dump_info.page_size, &local_err); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 398 | if (local_err) { |
| 399 | error_propagate(errp, local_err); |
| 400 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 401 | } |
| 402 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 403 | } |
| 404 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 405 | /* get the memory's offset and size in the vmcore */ |
| 406 | static void get_offset_range(hwaddr phys_addr, |
| 407 | ram_addr_t mapping_length, |
| 408 | DumpState *s, |
| 409 | hwaddr *p_offset, |
| 410 | hwaddr *p_filesz) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 411 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 412 | GuestPhysBlock *block; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 413 | hwaddr offset = s->memory_offset; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 414 | int64_t size_in_block, start; |
| 415 | |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 416 | /* When the memory is not stored into vmcore, offset will be -1 */ |
| 417 | *p_offset = -1; |
| 418 | *p_filesz = 0; |
| 419 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 420 | if (s->has_filter) { |
| 421 | if (phys_addr < s->begin || phys_addr >= s->begin + s->length) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 422 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 426 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 427 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 428 | if (block->target_start >= s->begin + s->length || |
| 429 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 430 | /* This block is out of the range */ |
| 431 | continue; |
| 432 | } |
| 433 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 434 | if (s->begin <= block->target_start) { |
| 435 | start = block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 436 | } else { |
| 437 | start = s->begin; |
| 438 | } |
| 439 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 440 | size_in_block = block->target_end - start; |
| 441 | if (s->begin + s->length < block->target_end) { |
| 442 | size_in_block -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 443 | } |
| 444 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 445 | start = block->target_start; |
| 446 | size_in_block = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | if (phys_addr >= start && phys_addr < start + size_in_block) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 450 | *p_offset = phys_addr - start + offset; |
| 451 | |
| 452 | /* The offset range mapped from the vmcore file must not spill over |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 453 | * the GuestPhysBlock, clamp it. The rest of the mapping will be |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 454 | * zero-filled in memory at load time; see |
| 455 | * <http://refspecs.linuxbase.org/elf/gabi4+/ch5.pheader.html>. |
| 456 | */ |
| 457 | *p_filesz = phys_addr + mapping_length <= start + size_in_block ? |
| 458 | mapping_length : |
| 459 | size_in_block - (phys_addr - start); |
| 460 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | offset += size_in_block; |
| 464 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 465 | } |
| 466 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 467 | static void write_elf_loads(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 468 | { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 469 | hwaddr offset, filesz; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 470 | MemoryMapping *memory_mapping; |
| 471 | uint32_t phdr_index = 1; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 472 | uint32_t max_index; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 473 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 474 | |
| 475 | if (s->have_section) { |
| 476 | max_index = s->sh_info; |
| 477 | } else { |
| 478 | max_index = s->phdr_num; |
| 479 | } |
| 480 | |
| 481 | QTAILQ_FOREACH(memory_mapping, &s->list.head, next) { |
Laszlo Ersek | 2cac260 | 2013-08-06 12:37:08 +0200 | [diff] [blame] | 482 | get_offset_range(memory_mapping->phys_addr, |
| 483 | memory_mapping->length, |
| 484 | s, &offset, &filesz); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 485 | if (s->dump_info.d_class == ELFCLASS64) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 486 | write_elf64_load(s, memory_mapping, phdr_index++, offset, |
| 487 | filesz, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 488 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 489 | write_elf32_load(s, memory_mapping, phdr_index++, offset, |
| 490 | filesz, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 491 | } |
| 492 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 493 | if (local_err) { |
| 494 | error_propagate(errp, local_err); |
| 495 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | if (phdr_index >= max_index) { |
| 499 | break; |
| 500 | } |
| 501 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | /* write elf header, PT_NOTE and elf note to vmcore. */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 505 | static void dump_begin(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 506 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 507 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 508 | |
| 509 | /* |
| 510 | * the vmcore's format is: |
| 511 | * -------------- |
| 512 | * | elf header | |
| 513 | * -------------- |
| 514 | * | PT_NOTE | |
| 515 | * -------------- |
| 516 | * | PT_LOAD | |
| 517 | * -------------- |
| 518 | * | ...... | |
| 519 | * -------------- |
| 520 | * | PT_LOAD | |
| 521 | * -------------- |
| 522 | * | sec_hdr | |
| 523 | * -------------- |
| 524 | * | elf note | |
| 525 | * -------------- |
| 526 | * | memory | |
| 527 | * -------------- |
| 528 | * |
| 529 | * we only know where the memory is saved after we write elf note into |
| 530 | * vmcore. |
| 531 | */ |
| 532 | |
| 533 | /* write elf header to vmcore */ |
| 534 | if (s->dump_info.d_class == ELFCLASS64) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 535 | write_elf64_header(s, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 536 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 537 | write_elf32_header(s, &local_err); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 538 | } |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 539 | if (local_err) { |
| 540 | error_propagate(errp, local_err); |
| 541 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | if (s->dump_info.d_class == ELFCLASS64) { |
| 545 | /* write PT_NOTE to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 546 | write_elf64_note(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 all PT_LOAD to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 553 | write_elf_loads(s, &local_err); |
| 554 | if (local_err) { |
| 555 | error_propagate(errp, local_err); |
| 556 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* write section to vmcore */ |
| 560 | if (s->have_section) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 561 | write_elf_section(s, 1, &local_err); |
| 562 | if (local_err) { |
| 563 | error_propagate(errp, local_err); |
| 564 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 565 | } |
| 566 | } |
| 567 | |
| 568 | /* write notes to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 569 | write_elf64_notes(fd_write_vmcore, s, &local_err); |
| 570 | if (local_err) { |
| 571 | error_propagate(errp, local_err); |
| 572 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 573 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 574 | } else { |
| 575 | /* write PT_NOTE to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 576 | write_elf32_note(s, &local_err); |
| 577 | if (local_err) { |
| 578 | error_propagate(errp, local_err); |
| 579 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | /* write all PT_LOAD to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 583 | write_elf_loads(s, &local_err); |
| 584 | if (local_err) { |
| 585 | error_propagate(errp, local_err); |
| 586 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | /* write section to vmcore */ |
| 590 | if (s->have_section) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 591 | write_elf_section(s, 0, &local_err); |
| 592 | if (local_err) { |
| 593 | error_propagate(errp, local_err); |
| 594 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 595 | } |
| 596 | } |
| 597 | |
| 598 | /* write notes to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 599 | write_elf32_notes(fd_write_vmcore, s, &local_err); |
| 600 | if (local_err) { |
| 601 | error_propagate(errp, local_err); |
| 602 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 603 | } |
| 604 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 605 | } |
| 606 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 607 | static int get_next_block(DumpState *s, GuestPhysBlock *block) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 608 | { |
| 609 | while (1) { |
Paolo Bonzini | a316103 | 2012-11-14 15:54:48 +0100 | [diff] [blame] | 610 | block = QTAILQ_NEXT(block, next); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 611 | if (!block) { |
| 612 | /* no more block */ |
| 613 | return 1; |
| 614 | } |
| 615 | |
| 616 | s->start = 0; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 617 | s->next_block = block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 618 | if (s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 619 | if (block->target_start >= s->begin + s->length || |
| 620 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 621 | /* This block is out of the range */ |
| 622 | continue; |
| 623 | } |
| 624 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 625 | if (s->begin > block->target_start) { |
| 626 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 627 | } |
| 628 | } |
| 629 | |
| 630 | return 0; |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | /* write all memory to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 635 | static void dump_iterate(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 636 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 637 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 638 | int64_t size; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 639 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 640 | |
Gonglei | 08a655b | 2014-10-30 14:01:17 +0800 | [diff] [blame] | 641 | do { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 642 | block = s->next_block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 643 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 644 | size = block->target_end - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 645 | if (s->has_filter) { |
| 646 | size -= s->start; |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 647 | if (s->begin + s->length < block->target_end) { |
| 648 | size -= block->target_end - (s->begin + s->length); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 649 | } |
| 650 | } |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 651 | write_memory(s, block, s->start, size, &local_err); |
| 652 | if (local_err) { |
| 653 | error_propagate(errp, local_err); |
| 654 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 655 | } |
| 656 | |
Gonglei | 08a655b | 2014-10-30 14:01:17 +0800 | [diff] [blame] | 657 | } while (!get_next_block(s, block)); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 658 | } |
| 659 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 660 | static void create_vmcore(DumpState *s, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 661 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 662 | Error *local_err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 663 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 664 | dump_begin(s, &local_err); |
| 665 | if (local_err) { |
| 666 | error_propagate(errp, local_err); |
| 667 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 668 | } |
| 669 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 670 | dump_iterate(s, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 671 | } |
| 672 | |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 673 | static int write_start_flat_header(int fd) |
| 674 | { |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 675 | MakedumpfileHeader *mh; |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 676 | int ret = 0; |
| 677 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 678 | QEMU_BUILD_BUG_ON(sizeof *mh > MAX_SIZE_MDF_HEADER); |
| 679 | mh = g_malloc0(MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 680 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 681 | memcpy(mh->signature, MAKEDUMPFILE_SIGNATURE, |
| 682 | MIN(sizeof mh->signature, sizeof MAKEDUMPFILE_SIGNATURE)); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 683 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 684 | mh->type = cpu_to_be64(TYPE_FLAT_HEADER); |
| 685 | mh->version = cpu_to_be64(VERSION_FLAT_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 686 | |
| 687 | size_t written_size; |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 688 | written_size = qemu_write_full(fd, mh, MAX_SIZE_MDF_HEADER); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 689 | if (written_size != MAX_SIZE_MDF_HEADER) { |
| 690 | ret = -1; |
| 691 | } |
| 692 | |
Laszlo Ersek | 92ba140 | 2014-05-20 13:39:42 +0200 | [diff] [blame] | 693 | g_free(mh); |
qiaonuohan | fda0538 | 2014-02-18 14:11:27 +0800 | [diff] [blame] | 694 | return ret; |
| 695 | } |
| 696 | |
| 697 | static int write_end_flat_header(int fd) |
| 698 | { |
| 699 | MakedumpfileDataHeader mdh; |
| 700 | |
| 701 | mdh.offset = END_FLAG_FLAT_HEADER; |
| 702 | mdh.buf_size = END_FLAG_FLAT_HEADER; |
| 703 | |
| 704 | size_t written_size; |
| 705 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 706 | if (written_size != sizeof(mdh)) { |
| 707 | return -1; |
| 708 | } |
| 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
qiaonuohan | 5d31bab | 2014-02-18 14:11:28 +0800 | [diff] [blame] | 713 | static int write_buffer(int fd, off_t offset, const void *buf, size_t size) |
| 714 | { |
| 715 | size_t written_size; |
| 716 | MakedumpfileDataHeader mdh; |
| 717 | |
| 718 | mdh.offset = cpu_to_be64(offset); |
| 719 | mdh.buf_size = cpu_to_be64(size); |
| 720 | |
| 721 | written_size = qemu_write_full(fd, &mdh, sizeof(mdh)); |
| 722 | if (written_size != sizeof(mdh)) { |
| 723 | return -1; |
| 724 | } |
| 725 | |
| 726 | written_size = qemu_write_full(fd, buf, size); |
| 727 | if (written_size != size) { |
| 728 | return -1; |
| 729 | } |
| 730 | |
| 731 | return 0; |
| 732 | } |
| 733 | |
qiaonuohan | 4835ef7 | 2014-02-18 14:11:29 +0800 | [diff] [blame] | 734 | static int buf_write_note(const void *buf, size_t size, void *opaque) |
| 735 | { |
| 736 | DumpState *s = opaque; |
| 737 | |
| 738 | /* note_buf is not enough */ |
| 739 | if (s->note_buf_offset + size > s->note_size) { |
| 740 | return -1; |
| 741 | } |
| 742 | |
| 743 | memcpy(s->note_buf + s->note_buf_offset, buf, size); |
| 744 | |
| 745 | s->note_buf_offset += size; |
| 746 | |
| 747 | return 0; |
| 748 | } |
| 749 | |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 750 | /* |
| 751 | * This function retrieves various sizes from an elf header. |
| 752 | * |
| 753 | * @note has to be a valid ELF note. The return sizes are unmodified |
| 754 | * (not padded or rounded up to be multiple of 4). |
| 755 | */ |
| 756 | static void get_note_sizes(DumpState *s, const void *note, |
| 757 | uint64_t *note_head_size, |
| 758 | uint64_t *name_size, |
| 759 | uint64_t *desc_size) |
| 760 | { |
| 761 | uint64_t note_head_sz; |
| 762 | uint64_t name_sz; |
| 763 | uint64_t desc_sz; |
| 764 | |
| 765 | if (s->dump_info.d_class == ELFCLASS64) { |
| 766 | const Elf64_Nhdr *hdr = note; |
| 767 | note_head_sz = sizeof(Elf64_Nhdr); |
| 768 | name_sz = tswap64(hdr->n_namesz); |
| 769 | desc_sz = tswap64(hdr->n_descsz); |
| 770 | } else { |
| 771 | const Elf32_Nhdr *hdr = note; |
| 772 | note_head_sz = sizeof(Elf32_Nhdr); |
| 773 | name_sz = tswap32(hdr->n_namesz); |
| 774 | desc_sz = tswap32(hdr->n_descsz); |
| 775 | } |
| 776 | |
| 777 | if (note_head_size) { |
| 778 | *note_head_size = note_head_sz; |
| 779 | } |
| 780 | if (name_size) { |
| 781 | *name_size = name_sz; |
| 782 | } |
| 783 | if (desc_size) { |
| 784 | *desc_size = desc_sz; |
| 785 | } |
| 786 | } |
| 787 | |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 788 | static bool note_name_equal(DumpState *s, |
| 789 | const uint8_t *note, const char *name) |
| 790 | { |
| 791 | int len = strlen(name) + 1; |
| 792 | uint64_t head_size, name_size; |
| 793 | |
| 794 | get_note_sizes(s, note, &head_size, &name_size, NULL); |
| 795 | head_size = ROUND_UP(head_size, 4); |
| 796 | |
Marc-André Lureau | c983ca8 | 2017-12-12 15:53:59 +0100 | [diff] [blame] | 797 | return name_size == len && memcmp(note + head_size, name, len) == 0; |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 798 | } |
| 799 | |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 800 | /* write common header, sub header and elf note to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 801 | static void create_header32(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 802 | { |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 803 | DiskDumpHeader32 *dh = NULL; |
| 804 | KdumpSubHeader32 *kh = NULL; |
| 805 | size_t size; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 806 | uint32_t block_size; |
| 807 | uint32_t sub_hdr_size; |
| 808 | uint32_t bitmap_blocks; |
| 809 | uint32_t status = 0; |
| 810 | uint64_t offset_note; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 811 | Error *local_err = NULL; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 812 | |
| 813 | /* write common header, the version of kdump-compressed format is 6th */ |
| 814 | size = sizeof(DiskDumpHeader32); |
| 815 | dh = g_malloc0(size); |
| 816 | |
Eric Blake | 84c868f | 2018-03-27 15:21:51 -0500 | [diff] [blame] | 817 | memcpy(dh->signature, KDUMP_SIGNATURE, SIG_LEN); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 818 | dh->header_version = cpu_to_dump32(s, 6); |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 819 | block_size = s->dump_info.page_size; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 820 | dh->block_size = cpu_to_dump32(s, block_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 821 | sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size; |
| 822 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 823 | dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 824 | /* 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] | 825 | dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); |
| 826 | dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 827 | 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] | 828 | dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 829 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 830 | |
| 831 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 832 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 833 | } |
| 834 | #ifdef CONFIG_LZO |
| 835 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 836 | status |= DUMP_DH_COMPRESSED_LZO; |
| 837 | } |
| 838 | #endif |
| 839 | #ifdef CONFIG_SNAPPY |
| 840 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 841 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 842 | } |
| 843 | #endif |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 844 | dh->status = cpu_to_dump32(s, status); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 845 | |
| 846 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 847 | error_setg(errp, "dump: failed to write disk dump header"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 848 | goto out; |
| 849 | } |
| 850 | |
| 851 | /* write sub header */ |
| 852 | size = sizeof(KdumpSubHeader32); |
| 853 | kh = g_malloc0(size); |
| 854 | |
| 855 | /* 64bit max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 856 | kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); |
Andrew Jones | b6e05aa | 2016-01-11 20:56:21 +0100 | [diff] [blame] | 857 | kh->phys_base = cpu_to_dump32(s, s->dump_info.phys_base); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 858 | kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 859 | |
| 860 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
Marc-André Lureau | 9ada575 | 2017-09-11 18:59:27 +0200 | [diff] [blame] | 861 | if (s->guest_note && |
| 862 | note_name_equal(s, s->guest_note, "VMCOREINFO")) { |
| 863 | uint64_t hsize, name_size, size_vmcoreinfo_desc, offset_vmcoreinfo; |
| 864 | |
| 865 | get_note_sizes(s, s->guest_note, |
| 866 | &hsize, &name_size, &size_vmcoreinfo_desc); |
| 867 | offset_vmcoreinfo = offset_note + s->note_size - s->guest_note_size + |
| 868 | (DIV_ROUND_UP(hsize, 4) + DIV_ROUND_UP(name_size, 4)) * 4; |
| 869 | kh->offset_vmcoreinfo = cpu_to_dump64(s, offset_vmcoreinfo); |
| 870 | kh->size_vmcoreinfo = cpu_to_dump32(s, size_vmcoreinfo_desc); |
| 871 | } |
| 872 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 873 | kh->offset_note = cpu_to_dump64(s, offset_note); |
| 874 | kh->note_size = cpu_to_dump32(s, s->note_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 875 | |
| 876 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 877 | block_size, kh, size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 878 | error_setg(errp, "dump: failed to write kdump sub header"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 879 | goto out; |
| 880 | } |
| 881 | |
| 882 | /* write note */ |
| 883 | s->note_buf = g_malloc0(s->note_size); |
| 884 | s->note_buf_offset = 0; |
| 885 | |
| 886 | /* use s->note_buf to store notes temporarily */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 887 | write_elf32_notes(buf_write_note, s, &local_err); |
| 888 | if (local_err) { |
| 889 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 890 | goto out; |
| 891 | } |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 892 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 893 | s->note_size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 894 | error_setg(errp, "dump: failed to write notes"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 895 | goto out; |
| 896 | } |
| 897 | |
| 898 | /* get offset of dump_bitmap */ |
| 899 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 900 | block_size; |
| 901 | |
| 902 | /* get offset of page */ |
| 903 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 904 | block_size; |
| 905 | |
| 906 | out: |
| 907 | g_free(dh); |
| 908 | g_free(kh); |
| 909 | g_free(s->note_buf); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 910 | } |
| 911 | |
| 912 | /* write common header, sub header and elf note to vmcore */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 913 | static void create_header64(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 914 | { |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 915 | DiskDumpHeader64 *dh = NULL; |
| 916 | KdumpSubHeader64 *kh = NULL; |
| 917 | size_t size; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 918 | uint32_t block_size; |
| 919 | uint32_t sub_hdr_size; |
| 920 | uint32_t bitmap_blocks; |
| 921 | uint32_t status = 0; |
| 922 | uint64_t offset_note; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 923 | Error *local_err = NULL; |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 924 | |
| 925 | /* write common header, the version of kdump-compressed format is 6th */ |
| 926 | size = sizeof(DiskDumpHeader64); |
| 927 | dh = g_malloc0(size); |
| 928 | |
Eric Blake | 84c868f | 2018-03-27 15:21:51 -0500 | [diff] [blame] | 929 | memcpy(dh->signature, KDUMP_SIGNATURE, SIG_LEN); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 930 | dh->header_version = cpu_to_dump32(s, 6); |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 931 | block_size = s->dump_info.page_size; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 932 | dh->block_size = cpu_to_dump32(s, block_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 933 | sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size; |
| 934 | sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 935 | dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 936 | /* 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] | 937 | dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); |
| 938 | dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 939 | 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] | 940 | dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); |
qiaonuohan | 4ab23a9 | 2014-02-18 14:11:37 +0800 | [diff] [blame] | 941 | strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 942 | |
| 943 | if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { |
| 944 | status |= DUMP_DH_COMPRESSED_ZLIB; |
| 945 | } |
| 946 | #ifdef CONFIG_LZO |
| 947 | if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) { |
| 948 | status |= DUMP_DH_COMPRESSED_LZO; |
| 949 | } |
| 950 | #endif |
| 951 | #ifdef CONFIG_SNAPPY |
| 952 | if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) { |
| 953 | status |= DUMP_DH_COMPRESSED_SNAPPY; |
| 954 | } |
| 955 | #endif |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 956 | dh->status = cpu_to_dump32(s, status); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 957 | |
| 958 | if (write_buffer(s->fd, 0, dh, size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 959 | error_setg(errp, "dump: failed to write disk dump header"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 960 | goto out; |
| 961 | } |
| 962 | |
| 963 | /* write sub header */ |
| 964 | size = sizeof(KdumpSubHeader64); |
| 965 | kh = g_malloc0(size); |
| 966 | |
| 967 | /* 64bit max_mapnr_64 */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 968 | kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); |
Andrew Jones | b6e05aa | 2016-01-11 20:56:21 +0100 | [diff] [blame] | 969 | kh->phys_base = cpu_to_dump64(s, s->dump_info.phys_base); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 970 | kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 971 | |
| 972 | offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; |
Marc-André Lureau | 9ada575 | 2017-09-11 18:59:27 +0200 | [diff] [blame] | 973 | if (s->guest_note && |
| 974 | note_name_equal(s, s->guest_note, "VMCOREINFO")) { |
| 975 | uint64_t hsize, name_size, size_vmcoreinfo_desc, offset_vmcoreinfo; |
| 976 | |
| 977 | get_note_sizes(s, s->guest_note, |
| 978 | &hsize, &name_size, &size_vmcoreinfo_desc); |
| 979 | offset_vmcoreinfo = offset_note + s->note_size - s->guest_note_size + |
| 980 | (DIV_ROUND_UP(hsize, 4) + DIV_ROUND_UP(name_size, 4)) * 4; |
| 981 | kh->offset_vmcoreinfo = cpu_to_dump64(s, offset_vmcoreinfo); |
| 982 | kh->size_vmcoreinfo = cpu_to_dump64(s, size_vmcoreinfo_desc); |
| 983 | } |
| 984 | |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 985 | kh->offset_note = cpu_to_dump64(s, offset_note); |
| 986 | kh->note_size = cpu_to_dump64(s, s->note_size); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 987 | |
| 988 | if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * |
| 989 | block_size, kh, size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 990 | error_setg(errp, "dump: failed to write kdump sub header"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 991 | goto out; |
| 992 | } |
| 993 | |
| 994 | /* write note */ |
| 995 | s->note_buf = g_malloc0(s->note_size); |
| 996 | s->note_buf_offset = 0; |
| 997 | |
| 998 | /* use s->note_buf to store notes temporarily */ |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 999 | write_elf64_notes(buf_write_note, s, &local_err); |
| 1000 | if (local_err) { |
| 1001 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1002 | goto out; |
| 1003 | } |
| 1004 | |
| 1005 | if (write_buffer(s->fd, offset_note, s->note_buf, |
| 1006 | s->note_size) < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1007 | error_setg(errp, "dump: failed to write notes"); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1008 | goto out; |
| 1009 | } |
| 1010 | |
| 1011 | /* get offset of dump_bitmap */ |
| 1012 | s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) * |
| 1013 | block_size; |
| 1014 | |
| 1015 | /* get offset of page */ |
| 1016 | s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) * |
| 1017 | block_size; |
| 1018 | |
| 1019 | out: |
| 1020 | g_free(dh); |
| 1021 | g_free(kh); |
| 1022 | g_free(s->note_buf); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1023 | } |
| 1024 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1025 | static void write_dump_header(DumpState *s, Error **errp) |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1026 | { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1027 | Error *local_err = NULL; |
| 1028 | |
Laszlo Ersek | 24aeeac | 2014-05-20 13:39:45 +0200 | [diff] [blame] | 1029 | if (s->dump_info.d_class == ELFCLASS32) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1030 | create_header32(s, &local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1031 | } else { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1032 | create_header64(s, &local_err); |
| 1033 | } |
Eduardo Habkost | 621ff94 | 2016-06-13 18:57:56 -0300 | [diff] [blame] | 1034 | error_propagate(errp, local_err); |
qiaonuohan | 298f116 | 2014-02-18 14:11:32 +0800 | [diff] [blame] | 1035 | } |
| 1036 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1037 | static size_t dump_bitmap_get_bufsize(DumpState *s) |
| 1038 | { |
| 1039 | return s->dump_info.page_size; |
| 1040 | } |
| 1041 | |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1042 | /* |
| 1043 | * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be |
| 1044 | * rewritten, so if need to set the first bit, set last_pfn and pfn to 0. |
| 1045 | * set_dump_bitmap will always leave the recently set bit un-sync. And setting |
| 1046 | * (last bit + sizeof(buf) * 8) to 0 will do flushing the content in buf into |
| 1047 | * vmcore, ie. synchronizing un-sync bit into vmcore. |
| 1048 | */ |
| 1049 | static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, |
| 1050 | uint8_t *buf, DumpState *s) |
| 1051 | { |
| 1052 | off_t old_offset, new_offset; |
| 1053 | off_t offset_bitmap1, offset_bitmap2; |
| 1054 | uint32_t byte, bit; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1055 | size_t bitmap_bufsize = dump_bitmap_get_bufsize(s); |
| 1056 | size_t bits_per_buf = bitmap_bufsize * CHAR_BIT; |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1057 | |
| 1058 | /* should not set the previous place */ |
| 1059 | assert(last_pfn <= pfn); |
| 1060 | |
| 1061 | /* |
| 1062 | * if the bit needed to be set is not cached in buf, flush the data in buf |
| 1063 | * to vmcore firstly. |
| 1064 | * making new_offset be bigger than old_offset can also sync remained data |
| 1065 | * into vmcore. |
| 1066 | */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1067 | old_offset = bitmap_bufsize * (last_pfn / bits_per_buf); |
| 1068 | new_offset = bitmap_bufsize * (pfn / bits_per_buf); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1069 | |
| 1070 | while (old_offset < new_offset) { |
| 1071 | /* calculate the offset and write dump_bitmap */ |
| 1072 | offset_bitmap1 = s->offset_dump_bitmap + old_offset; |
| 1073 | if (write_buffer(s->fd, offset_bitmap1, buf, |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1074 | bitmap_bufsize) < 0) { |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1075 | return -1; |
| 1076 | } |
| 1077 | |
| 1078 | /* dump level 1 is chosen, so 1st and 2nd bitmap are same */ |
| 1079 | offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap + |
| 1080 | old_offset; |
| 1081 | if (write_buffer(s->fd, offset_bitmap2, buf, |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1082 | bitmap_bufsize) < 0) { |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1083 | return -1; |
| 1084 | } |
| 1085 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1086 | memset(buf, 0, bitmap_bufsize); |
| 1087 | old_offset += bitmap_bufsize; |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1088 | } |
| 1089 | |
| 1090 | /* get the exact place of the bit in the buf, and set it */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1091 | byte = (pfn % bits_per_buf) / CHAR_BIT; |
| 1092 | bit = (pfn % bits_per_buf) % CHAR_BIT; |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1093 | if (value) { |
| 1094 | buf[byte] |= 1u << bit; |
| 1095 | } else { |
| 1096 | buf[byte] &= ~(1u << bit); |
| 1097 | } |
| 1098 | |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1102 | static uint64_t dump_paddr_to_pfn(DumpState *s, uint64_t addr) |
| 1103 | { |
| 1104 | int target_page_shift = ctz32(s->dump_info.page_size); |
| 1105 | |
| 1106 | return (addr >> target_page_shift) - ARCH_PFN_OFFSET; |
| 1107 | } |
| 1108 | |
| 1109 | static uint64_t dump_pfn_to_paddr(DumpState *s, uint64_t pfn) |
| 1110 | { |
| 1111 | int target_page_shift = ctz32(s->dump_info.page_size); |
| 1112 | |
| 1113 | return (pfn + ARCH_PFN_OFFSET) << target_page_shift; |
| 1114 | } |
| 1115 | |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1116 | /* |
| 1117 | * exam every page and return the page frame number and the address of the page. |
| 1118 | * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys |
| 1119 | * blocks, so block->target_start and block->target_end should be interal |
| 1120 | * multiples of the target page size. |
| 1121 | */ |
| 1122 | static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, |
| 1123 | uint8_t **bufptr, DumpState *s) |
| 1124 | { |
| 1125 | GuestPhysBlock *block = *blockptr; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1126 | hwaddr addr, target_page_mask = ~((hwaddr)s->dump_info.page_size - 1); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1127 | uint8_t *buf; |
| 1128 | |
| 1129 | /* block == NULL means the start of the iteration */ |
| 1130 | if (!block) { |
| 1131 | block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
| 1132 | *blockptr = block; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1133 | assert((block->target_start & ~target_page_mask) == 0); |
| 1134 | assert((block->target_end & ~target_page_mask) == 0); |
| 1135 | *pfnptr = dump_paddr_to_pfn(s, block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1136 | if (bufptr) { |
| 1137 | *bufptr = block->host_addr; |
| 1138 | } |
| 1139 | return true; |
| 1140 | } |
| 1141 | |
| 1142 | *pfnptr = *pfnptr + 1; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1143 | addr = dump_pfn_to_paddr(s, *pfnptr); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1144 | |
| 1145 | if ((addr >= block->target_start) && |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1146 | (addr + s->dump_info.page_size <= block->target_end)) { |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1147 | buf = block->host_addr + (addr - block->target_start); |
| 1148 | } else { |
| 1149 | /* the next page is in the next block */ |
| 1150 | block = QTAILQ_NEXT(block, next); |
| 1151 | *blockptr = block; |
| 1152 | if (!block) { |
| 1153 | return false; |
| 1154 | } |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1155 | assert((block->target_start & ~target_page_mask) == 0); |
| 1156 | assert((block->target_end & ~target_page_mask) == 0); |
| 1157 | *pfnptr = dump_paddr_to_pfn(s, block->target_start); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1158 | buf = block->host_addr; |
| 1159 | } |
| 1160 | |
| 1161 | if (bufptr) { |
| 1162 | *bufptr = buf; |
| 1163 | } |
| 1164 | |
| 1165 | return true; |
| 1166 | } |
| 1167 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1168 | static void write_dump_bitmap(DumpState *s, Error **errp) |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1169 | { |
| 1170 | int ret = 0; |
| 1171 | uint64_t last_pfn, pfn; |
| 1172 | void *dump_bitmap_buf; |
| 1173 | size_t num_dumpable; |
| 1174 | GuestPhysBlock *block_iter = NULL; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1175 | size_t bitmap_bufsize = dump_bitmap_get_bufsize(s); |
| 1176 | size_t bits_per_buf = bitmap_bufsize * CHAR_BIT; |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1177 | |
| 1178 | /* dump_bitmap_buf is used to store dump_bitmap temporarily */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1179 | dump_bitmap_buf = g_malloc0(bitmap_bufsize); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1180 | |
| 1181 | num_dumpable = 0; |
| 1182 | last_pfn = 0; |
| 1183 | |
| 1184 | /* |
| 1185 | * exam memory page by page, and set the bit in dump_bitmap corresponded |
| 1186 | * to the existing page. |
| 1187 | */ |
| 1188 | while (get_next_page(&block_iter, &pfn, NULL, s)) { |
| 1189 | ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s); |
| 1190 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1191 | error_setg(errp, "dump: failed to set dump_bitmap"); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1192 | goto out; |
| 1193 | } |
| 1194 | |
| 1195 | last_pfn = pfn; |
| 1196 | num_dumpable++; |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * set_dump_bitmap will always leave the recently set bit un-sync. Here we |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1201 | * set the remaining bits from last_pfn to the end of the bitmap buffer to |
| 1202 | * 0. With those set, the un-sync bit will be synchronized into the vmcore. |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1203 | */ |
| 1204 | if (num_dumpable > 0) { |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1205 | ret = set_dump_bitmap(last_pfn, last_pfn + bits_per_buf, false, |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1206 | dump_bitmap_buf, s); |
| 1207 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1208 | error_setg(errp, "dump: failed to sync dump_bitmap"); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1209 | goto out; |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | /* number of dumpable pages that will be dumped later */ |
| 1214 | s->num_dumpable = num_dumpable; |
| 1215 | |
| 1216 | out: |
| 1217 | g_free(dump_bitmap_buf); |
qiaonuohan | d0686c7 | 2014-02-18 14:11:33 +0800 | [diff] [blame] | 1218 | } |
| 1219 | |
qiaonuohan | 64cfba6 | 2014-02-18 14:11:34 +0800 | [diff] [blame] | 1220 | static void prepare_data_cache(DataCache *data_cache, DumpState *s, |
| 1221 | off_t offset) |
| 1222 | { |
| 1223 | data_cache->fd = s->fd; |
| 1224 | data_cache->data_size = 0; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1225 | data_cache->buf_size = 4 * dump_bitmap_get_bufsize(s); |
| 1226 | data_cache->buf = g_malloc0(data_cache->buf_size); |
qiaonuohan | 64cfba6 | 2014-02-18 14:11:34 +0800 | [diff] [blame] | 1227 | data_cache->offset = offset; |
| 1228 | } |
| 1229 | |
| 1230 | static int write_cache(DataCache *dc, const void *buf, size_t size, |
| 1231 | bool flag_sync) |
| 1232 | { |
| 1233 | /* |
| 1234 | * dc->buf_size should not be less than size, otherwise dc will never be |
| 1235 | * enough |
| 1236 | */ |
| 1237 | assert(size <= dc->buf_size); |
| 1238 | |
| 1239 | /* |
| 1240 | * if flag_sync is set, synchronize data in dc->buf into vmcore. |
| 1241 | * otherwise check if the space is enough for caching data in buf, if not, |
| 1242 | * write the data in dc->buf to dc->fd and reset dc->buf |
| 1243 | */ |
| 1244 | if ((!flag_sync && dc->data_size + size > dc->buf_size) || |
| 1245 | (flag_sync && dc->data_size > 0)) { |
| 1246 | if (write_buffer(dc->fd, dc->offset, dc->buf, dc->data_size) < 0) { |
| 1247 | return -1; |
| 1248 | } |
| 1249 | |
| 1250 | dc->offset += dc->data_size; |
| 1251 | dc->data_size = 0; |
| 1252 | } |
| 1253 | |
| 1254 | if (!flag_sync) { |
| 1255 | memcpy(dc->buf + dc->data_size, buf, size); |
| 1256 | dc->data_size += size; |
| 1257 | } |
| 1258 | |
| 1259 | return 0; |
| 1260 | } |
| 1261 | |
| 1262 | static void free_data_cache(DataCache *data_cache) |
| 1263 | { |
| 1264 | g_free(data_cache->buf); |
| 1265 | } |
| 1266 | |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1267 | static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress) |
| 1268 | { |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1269 | switch (flag_compress) { |
| 1270 | case DUMP_DH_COMPRESSED_ZLIB: |
| 1271 | return compressBound(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1272 | |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1273 | case DUMP_DH_COMPRESSED_LZO: |
| 1274 | /* |
| 1275 | * LZO will expand incompressible data by a little amount. Please check |
| 1276 | * the following URL to see the expansion calculation: |
| 1277 | * http://www.oberhumer.com/opensource/lzo/lzofaq.php |
| 1278 | */ |
| 1279 | return page_size + page_size / 16 + 64 + 3; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1280 | |
| 1281 | #ifdef CONFIG_SNAPPY |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1282 | case DUMP_DH_COMPRESSED_SNAPPY: |
| 1283 | return snappy_max_compressed_length(page_size); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1284 | #endif |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1285 | } |
| 1286 | return 0; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1287 | } |
| 1288 | |
| 1289 | /* |
| 1290 | * check if the page is all 0 |
| 1291 | */ |
| 1292 | static inline bool is_zero_page(const uint8_t *buf, size_t page_size) |
| 1293 | { |
| 1294 | return buffer_is_zero(buf, page_size); |
| 1295 | } |
| 1296 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1297 | static void write_dump_pages(DumpState *s, Error **errp) |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1298 | { |
| 1299 | int ret = 0; |
| 1300 | DataCache page_desc, page_data; |
| 1301 | size_t len_buf_out, size_out; |
| 1302 | #ifdef CONFIG_LZO |
| 1303 | lzo_bytep wrkmem = NULL; |
| 1304 | #endif |
| 1305 | uint8_t *buf_out = NULL; |
| 1306 | off_t offset_desc, offset_data; |
| 1307 | PageDescriptor pd, pd_zero; |
| 1308 | uint8_t *buf; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1309 | GuestPhysBlock *block_iter = NULL; |
| 1310 | uint64_t pfn_iter; |
| 1311 | |
| 1312 | /* get offset of page_desc and page_data in dump file */ |
| 1313 | offset_desc = s->offset_page; |
| 1314 | offset_data = offset_desc + sizeof(PageDescriptor) * s->num_dumpable; |
| 1315 | |
| 1316 | prepare_data_cache(&page_desc, s, offset_desc); |
| 1317 | prepare_data_cache(&page_data, s, offset_data); |
| 1318 | |
| 1319 | /* prepare buffer to store compressed data */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1320 | len_buf_out = get_len_buf_out(s->dump_info.page_size, s->flag_compress); |
Laszlo Ersek | b87ef35 | 2014-05-20 13:42:53 +0200 | [diff] [blame] | 1321 | assert(len_buf_out != 0); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1322 | |
| 1323 | #ifdef CONFIG_LZO |
| 1324 | wrkmem = g_malloc(LZO1X_1_MEM_COMPRESS); |
| 1325 | #endif |
| 1326 | |
| 1327 | buf_out = g_malloc(len_buf_out); |
| 1328 | |
| 1329 | /* |
| 1330 | * init zero page's page_desc and page_data, because every zero page |
| 1331 | * uses the same page_data |
| 1332 | */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1333 | pd_zero.size = cpu_to_dump32(s, s->dump_info.page_size); |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1334 | pd_zero.flags = cpu_to_dump32(s, 0); |
| 1335 | pd_zero.offset = cpu_to_dump64(s, offset_data); |
| 1336 | pd_zero.page_flags = cpu_to_dump64(s, 0); |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1337 | buf = g_malloc0(s->dump_info.page_size); |
| 1338 | ret = write_cache(&page_data, buf, s->dump_info.page_size, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1339 | g_free(buf); |
| 1340 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1341 | error_setg(errp, "dump: failed to write page data (zero page)"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1342 | goto out; |
| 1343 | } |
| 1344 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1345 | offset_data += s->dump_info.page_size; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1346 | |
| 1347 | /* |
| 1348 | * dump memory to vmcore page by page. zero page will all be resided in the |
| 1349 | * first page of page section |
| 1350 | */ |
| 1351 | while (get_next_page(&block_iter, &pfn_iter, &buf, s)) { |
| 1352 | /* check zero page */ |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1353 | if (is_zero_page(buf, s->dump_info.page_size)) { |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1354 | ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor), |
| 1355 | false); |
| 1356 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1357 | error_setg(errp, "dump: failed to write page desc"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1358 | goto out; |
| 1359 | } |
| 1360 | } else { |
| 1361 | /* |
| 1362 | * not zero page, then: |
| 1363 | * 1. compress the page |
| 1364 | * 2. write the compressed page into the cache of page_data |
| 1365 | * 3. get page desc of the compressed page and write it into the |
| 1366 | * cache of page_desc |
| 1367 | * |
| 1368 | * only one compression format will be used here, for |
| 1369 | * s->flag_compress is set. But when compression fails to work, |
| 1370 | * we fall back to save in plaintext. |
| 1371 | */ |
| 1372 | size_out = len_buf_out; |
| 1373 | if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) && |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1374 | (compress2(buf_out, (uLongf *)&size_out, buf, |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1375 | s->dump_info.page_size, Z_BEST_SPEED) == Z_OK) && |
| 1376 | (size_out < s->dump_info.page_size)) { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1377 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_ZLIB); |
| 1378 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1379 | |
| 1380 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1381 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1382 | error_setg(errp, "dump: failed to write page data"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1383 | goto out; |
| 1384 | } |
| 1385 | #ifdef CONFIG_LZO |
| 1386 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) && |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1387 | (lzo1x_1_compress(buf, s->dump_info.page_size, buf_out, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1388 | (lzo_uint *)&size_out, wrkmem) == LZO_E_OK) && |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1389 | (size_out < s->dump_info.page_size)) { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1390 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_LZO); |
| 1391 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1392 | |
| 1393 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1394 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1395 | error_setg(errp, "dump: failed to write page data"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1396 | goto out; |
| 1397 | } |
| 1398 | #endif |
| 1399 | #ifdef CONFIG_SNAPPY |
| 1400 | } else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) && |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1401 | (snappy_compress((char *)buf, s->dump_info.page_size, |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1402 | (char *)buf_out, &size_out) == SNAPPY_OK) && |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1403 | (size_out < s->dump_info.page_size)) { |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1404 | pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_SNAPPY); |
| 1405 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1406 | |
| 1407 | ret = write_cache(&page_data, buf_out, size_out, false); |
| 1408 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1409 | error_setg(errp, "dump: failed to write page data"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1410 | goto out; |
| 1411 | } |
| 1412 | #endif |
| 1413 | } else { |
| 1414 | /* |
| 1415 | * fall back to save in plaintext, size_out should be |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1416 | * assigned the target's page size |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1417 | */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1418 | pd.flags = cpu_to_dump32(s, 0); |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1419 | size_out = s->dump_info.page_size; |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1420 | pd.size = cpu_to_dump32(s, size_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1421 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1422 | ret = write_cache(&page_data, buf, |
| 1423 | s->dump_info.page_size, false); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1424 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1425 | error_setg(errp, "dump: failed to write page data"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1426 | goto out; |
| 1427 | } |
| 1428 | } |
| 1429 | |
| 1430 | /* get and write page desc here */ |
Bharata B Rao | acb0ef5 | 2014-05-19 19:57:44 +0200 | [diff] [blame] | 1431 | pd.page_flags = cpu_to_dump64(s, 0); |
| 1432 | pd.offset = cpu_to_dump64(s, offset_data); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1433 | offset_data += size_out; |
| 1434 | |
| 1435 | ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false); |
| 1436 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1437 | error_setg(errp, "dump: failed to write page desc"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1438 | goto out; |
| 1439 | } |
| 1440 | } |
Peter Xu | 2264c2c | 2016-02-18 13:16:53 +0800 | [diff] [blame] | 1441 | s->written_size += s->dump_info.page_size; |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1442 | } |
| 1443 | |
| 1444 | ret = write_cache(&page_desc, NULL, 0, true); |
| 1445 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1446 | error_setg(errp, "dump: failed to sync cache for page_desc"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1447 | goto out; |
| 1448 | } |
| 1449 | ret = write_cache(&page_data, NULL, 0, true); |
| 1450 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1451 | error_setg(errp, "dump: failed to sync cache for page_data"); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1452 | goto out; |
| 1453 | } |
| 1454 | |
| 1455 | out: |
| 1456 | free_data_cache(&page_desc); |
| 1457 | free_data_cache(&page_data); |
| 1458 | |
| 1459 | #ifdef CONFIG_LZO |
| 1460 | g_free(wrkmem); |
| 1461 | #endif |
| 1462 | |
| 1463 | g_free(buf_out); |
qiaonuohan | d12f57e | 2014-02-18 14:11:35 +0800 | [diff] [blame] | 1464 | } |
| 1465 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1466 | static void create_kdump_vmcore(DumpState *s, Error **errp) |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1467 | { |
| 1468 | int ret; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1469 | Error *local_err = NULL; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1470 | |
| 1471 | /* |
| 1472 | * the kdump-compressed format is: |
| 1473 | * File offset |
| 1474 | * +------------------------------------------+ 0x0 |
| 1475 | * | main header (struct disk_dump_header) | |
| 1476 | * |------------------------------------------+ block 1 |
| 1477 | * | sub header (struct kdump_sub_header) | |
| 1478 | * |------------------------------------------+ block 2 |
| 1479 | * | 1st-dump_bitmap | |
| 1480 | * |------------------------------------------+ block 2 + X blocks |
| 1481 | * | 2nd-dump_bitmap | (aligned by block) |
| 1482 | * |------------------------------------------+ block 2 + 2 * X blocks |
| 1483 | * | page desc for pfn 0 (struct page_desc) | (aligned by block) |
| 1484 | * | page desc for pfn 1 (struct page_desc) | |
| 1485 | * | : | |
| 1486 | * |------------------------------------------| (not aligned by block) |
| 1487 | * | page data (pfn 0) | |
| 1488 | * | page data (pfn 1) | |
| 1489 | * | : | |
| 1490 | * +------------------------------------------+ |
| 1491 | */ |
| 1492 | |
| 1493 | ret = write_start_flat_header(s->fd); |
| 1494 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1495 | error_setg(errp, "dump: failed to write start flat header"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1496 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1497 | } |
| 1498 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1499 | write_dump_header(s, &local_err); |
| 1500 | if (local_err) { |
| 1501 | error_propagate(errp, local_err); |
| 1502 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1503 | } |
| 1504 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1505 | write_dump_bitmap(s, &local_err); |
| 1506 | if (local_err) { |
| 1507 | error_propagate(errp, local_err); |
| 1508 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1509 | } |
| 1510 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1511 | write_dump_pages(s, &local_err); |
| 1512 | if (local_err) { |
| 1513 | error_propagate(errp, local_err); |
| 1514 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1515 | } |
| 1516 | |
| 1517 | ret = write_end_flat_header(s->fd); |
| 1518 | if (ret < 0) { |
Peter Xu | e3517a5 | 2016-02-18 13:16:46 +0800 | [diff] [blame] | 1519 | error_setg(errp, "dump: failed to write end flat header"); |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1520 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1521 | } |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1522 | } |
| 1523 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1524 | static ram_addr_t get_start_block(DumpState *s) |
| 1525 | { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1526 | GuestPhysBlock *block; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1527 | |
| 1528 | if (!s->has_filter) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1529 | s->next_block = QTAILQ_FIRST(&s->guest_phys_blocks.head); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1530 | return 0; |
| 1531 | } |
| 1532 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1533 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
| 1534 | if (block->target_start >= s->begin + s->length || |
| 1535 | block->target_end <= s->begin) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1536 | /* This block is out of the range */ |
| 1537 | continue; |
| 1538 | } |
| 1539 | |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1540 | s->next_block = block; |
| 1541 | if (s->begin > block->target_start) { |
| 1542 | s->start = s->begin - block->target_start; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1543 | } else { |
| 1544 | s->start = 0; |
| 1545 | } |
| 1546 | return s->start; |
| 1547 | } |
| 1548 | |
| 1549 | return -1; |
| 1550 | } |
| 1551 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1552 | static void get_max_mapnr(DumpState *s) |
| 1553 | { |
| 1554 | GuestPhysBlock *last_block; |
| 1555 | |
| 1556 | last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead); |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1557 | s->max_mapnr = dump_paddr_to_pfn(s, last_block->target_end); |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1558 | } |
| 1559 | |
Peter Xu | baf28f5 | 2016-02-18 13:16:48 +0800 | [diff] [blame] | 1560 | static DumpState dump_state_global = { .status = DUMP_STATUS_NONE }; |
| 1561 | |
| 1562 | static void dump_state_prepare(DumpState *s) |
| 1563 | { |
| 1564 | /* zero the struct, setting status to active */ |
| 1565 | *s = (DumpState) { .status = DUMP_STATUS_ACTIVE }; |
| 1566 | } |
| 1567 | |
Peter Xu | 65d64f3 | 2016-02-18 13:16:49 +0800 | [diff] [blame] | 1568 | bool dump_in_progress(void) |
| 1569 | { |
| 1570 | DumpState *state = &dump_state_global; |
Peter Xu | 39ba2ea | 2016-02-18 13:16:54 +0800 | [diff] [blame] | 1571 | return (atomic_read(&state->status) == DUMP_STATUS_ACTIVE); |
Peter Xu | 65d64f3 | 2016-02-18 13:16:49 +0800 | [diff] [blame] | 1572 | } |
| 1573 | |
Peter Xu | 2264c2c | 2016-02-18 13:16:53 +0800 | [diff] [blame] | 1574 | /* calculate total size of memory to be dumped (taking filter into |
| 1575 | * acoount.) */ |
| 1576 | static int64_t dump_calculate_size(DumpState *s) |
| 1577 | { |
| 1578 | GuestPhysBlock *block; |
| 1579 | int64_t size = 0, total = 0, left = 0, right = 0; |
| 1580 | |
| 1581 | QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) { |
| 1582 | if (s->has_filter) { |
| 1583 | /* calculate the overlapped region. */ |
| 1584 | left = MAX(s->begin, block->target_start); |
| 1585 | right = MIN(s->begin + s->length, block->target_end); |
| 1586 | size = right - left; |
| 1587 | size = size > 0 ? size : 0; |
| 1588 | } else { |
| 1589 | /* count the whole region in */ |
| 1590 | size = (block->target_end - block->target_start); |
| 1591 | } |
| 1592 | total += size; |
| 1593 | } |
| 1594 | |
| 1595 | return total; |
| 1596 | } |
| 1597 | |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 1598 | static void vmcoreinfo_update_phys_base(DumpState *s) |
| 1599 | { |
| 1600 | uint64_t size, note_head_size, name_size, phys_base; |
| 1601 | char **lines; |
| 1602 | uint8_t *vmci; |
| 1603 | size_t i; |
| 1604 | |
| 1605 | if (!note_name_equal(s, s->guest_note, "VMCOREINFO")) { |
| 1606 | return; |
| 1607 | } |
| 1608 | |
| 1609 | get_note_sizes(s, s->guest_note, ¬e_head_size, &name_size, &size); |
| 1610 | note_head_size = ROUND_UP(note_head_size, 4); |
| 1611 | |
| 1612 | vmci = s->guest_note + note_head_size + ROUND_UP(name_size, 4); |
| 1613 | *(vmci + size) = '\0'; |
| 1614 | |
| 1615 | lines = g_strsplit((char *)vmci, "\n", -1); |
| 1616 | for (i = 0; lines[i]; i++) { |
Wei Huang | 68cbecf | 2018-03-09 12:03:23 -0500 | [diff] [blame] | 1617 | const char *prefix = NULL; |
| 1618 | |
| 1619 | if (s->dump_info.d_machine == EM_X86_64) { |
| 1620 | prefix = "NUMBER(phys_base)="; |
| 1621 | } else if (s->dump_info.d_machine == EM_AARCH64) { |
| 1622 | prefix = "NUMBER(PHYS_OFFSET)="; |
| 1623 | } |
| 1624 | |
| 1625 | if (prefix && g_str_has_prefix(lines[i], prefix)) { |
| 1626 | if (qemu_strtou64(lines[i] + strlen(prefix), NULL, 16, |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 1627 | &phys_base) < 0) { |
Wei Huang | 68cbecf | 2018-03-09 12:03:23 -0500 | [diff] [blame] | 1628 | warn_report("Failed to read %s", prefix); |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 1629 | } else { |
| 1630 | s->dump_info.phys_base = phys_base; |
| 1631 | } |
| 1632 | break; |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | g_strfreev(lines); |
| 1637 | } |
| 1638 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1639 | static void dump_init(DumpState *s, int fd, bool has_format, |
| 1640 | DumpGuestMemoryFormat format, bool paging, bool has_filter, |
| 1641 | int64_t begin, int64_t length, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1642 | { |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 1643 | VMCoreInfoState *vmci = vmcoreinfo_find(); |
Andreas Färber | 182735ef | 2013-05-29 22:29:20 +0200 | [diff] [blame] | 1644 | CPUState *cpu; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1645 | int nr_cpus; |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1646 | Error *err = NULL; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1647 | int ret; |
| 1648 | |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1649 | s->has_format = has_format; |
| 1650 | s->format = format; |
Peter Xu | 2264c2c | 2016-02-18 13:16:53 +0800 | [diff] [blame] | 1651 | s->written_size = 0; |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1652 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1653 | /* kdump-compressed is conflict with paging and filter */ |
| 1654 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1655 | assert(!paging && !has_filter); |
| 1656 | } |
| 1657 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1658 | if (runstate_is_running()) { |
| 1659 | vm_stop(RUN_STATE_SAVE_VM); |
| 1660 | s->resume = true; |
| 1661 | } else { |
| 1662 | s->resume = false; |
| 1663 | } |
| 1664 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1665 | /* If we use KVM, we should synchronize the registers before we get dump |
| 1666 | * info or physmap info. |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1667 | */ |
Andreas Färber | 1b3509c | 2013-06-09 16:48:29 +0200 | [diff] [blame] | 1668 | cpu_synchronize_all_states(); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1669 | nr_cpus = 0; |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 1670 | CPU_FOREACH(cpu) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1671 | nr_cpus++; |
| 1672 | } |
| 1673 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1674 | s->fd = fd; |
| 1675 | s->has_filter = has_filter; |
| 1676 | s->begin = begin; |
| 1677 | s->length = length; |
| 1678 | |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 1679 | memory_mapping_list_init(&s->list); |
| 1680 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1681 | guest_phys_blocks_init(&s->guest_phys_blocks); |
Laszlo Ersek | c5d7f60 | 2013-08-06 12:37:10 +0200 | [diff] [blame] | 1682 | guest_phys_blocks_append(&s->guest_phys_blocks); |
Peter Xu | 2264c2c | 2016-02-18 13:16:53 +0800 | [diff] [blame] | 1683 | s->total_size = dump_calculate_size(s); |
| 1684 | #ifdef DEBUG_DUMP_GUEST_MEMORY |
| 1685 | fprintf(stderr, "DUMP: total memory to dump: %lu\n", s->total_size); |
| 1686 | #endif |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1687 | |
Cornelia Huck | d1e6994 | 2017-09-13 16:20:35 +0200 | [diff] [blame] | 1688 | /* it does not make sense to dump non-existent memory */ |
| 1689 | if (!s->total_size) { |
| 1690 | error_setg(errp, "dump: no guest memory to dump"); |
| 1691 | goto cleanup; |
| 1692 | } |
| 1693 | |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1694 | s->start = get_start_block(s); |
| 1695 | if (s->start == -1) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1696 | error_setg(errp, QERR_INVALID_PARAMETER, "begin"); |
Laszlo Ersek | 5ee163e | 2013-08-06 12:37:09 +0200 | [diff] [blame] | 1697 | goto cleanup; |
| 1698 | } |
| 1699 | |
| 1700 | /* get dump info: endian, class and architecture. |
| 1701 | * If the target architecture is not supported, cpu_get_dump_info() will |
| 1702 | * return -1. |
| 1703 | */ |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1704 | ret = cpu_get_dump_info(&s->dump_info, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1705 | if (ret < 0) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1706 | error_setg(errp, QERR_UNSUPPORTED); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1707 | goto cleanup; |
| 1708 | } |
| 1709 | |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1710 | if (!s->dump_info.page_size) { |
| 1711 | s->dump_info.page_size = TARGET_PAGE_SIZE; |
| 1712 | } |
| 1713 | |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1714 | s->note_size = cpu_get_note_size(s->dump_info.d_class, |
| 1715 | s->dump_info.d_machine, nr_cpus); |
Aneesh Kumar K.V | bb6b684 | 2013-10-01 21:49:32 +0530 | [diff] [blame] | 1716 | if (s->note_size < 0) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1717 | error_setg(errp, QERR_UNSUPPORTED); |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 1718 | goto cleanup; |
| 1719 | } |
| 1720 | |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 1721 | /* |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 1722 | * The goal of this block is to (a) update the previously guessed |
| 1723 | * phys_base, (b) copy the guest note out of the guest. |
| 1724 | * Failure to do so is not fatal for dumping. |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 1725 | */ |
| 1726 | if (vmci) { |
| 1727 | uint64_t addr, note_head_size, name_size, desc_size; |
| 1728 | uint32_t size; |
| 1729 | uint16_t format; |
| 1730 | |
| 1731 | note_head_size = s->dump_info.d_class == ELFCLASS32 ? |
| 1732 | sizeof(Elf32_Nhdr) : sizeof(Elf64_Nhdr); |
| 1733 | |
| 1734 | format = le16_to_cpu(vmci->vmcoreinfo.guest_format); |
| 1735 | size = le32_to_cpu(vmci->vmcoreinfo.size); |
| 1736 | addr = le64_to_cpu(vmci->vmcoreinfo.paddr); |
| 1737 | if (!vmci->has_vmcoreinfo) { |
| 1738 | warn_report("guest note is not present"); |
| 1739 | } else if (size < note_head_size || size > MAX_GUEST_NOTE_SIZE) { |
| 1740 | warn_report("guest note size is invalid: %" PRIu32, size); |
| 1741 | } else if (format != VMCOREINFO_FORMAT_ELF) { |
| 1742 | warn_report("guest note format is unsupported: %" PRIu16, format); |
| 1743 | } else { |
| 1744 | s->guest_note = g_malloc(size + 1); /* +1 for adding \0 */ |
| 1745 | cpu_physical_memory_read(addr, s->guest_note, size); |
| 1746 | |
| 1747 | get_note_sizes(s, s->guest_note, NULL, &name_size, &desc_size); |
| 1748 | s->guest_note_size = ELF_NOTE_SIZE(note_head_size, name_size, |
| 1749 | desc_size); |
| 1750 | if (name_size > MAX_GUEST_NOTE_SIZE || |
| 1751 | desc_size > MAX_GUEST_NOTE_SIZE || |
| 1752 | s->guest_note_size > size) { |
| 1753 | warn_report("Invalid guest note header"); |
| 1754 | g_free(s->guest_note); |
| 1755 | s->guest_note = NULL; |
| 1756 | } else { |
Marc-André Lureau | d9feb51 | 2017-09-11 18:59:26 +0200 | [diff] [blame] | 1757 | vmcoreinfo_update_phys_base(s); |
Marc-André Lureau | 903ef73 | 2017-09-11 18:59:25 +0200 | [diff] [blame] | 1758 | s->note_size += s->guest_note_size; |
| 1759 | } |
| 1760 | } |
| 1761 | } |
| 1762 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1763 | /* get memory mapping */ |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1764 | if (paging) { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1765 | qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err); |
Andreas Färber | 11ed09c | 2013-05-29 21:54:03 +0200 | [diff] [blame] | 1766 | if (err != NULL) { |
| 1767 | error_propagate(errp, err); |
| 1768 | goto cleanup; |
| 1769 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1770 | } else { |
Laszlo Ersek | 56c4bfb | 2013-08-06 12:37:11 +0200 | [diff] [blame] | 1771 | qemu_get_guest_simple_memory_mapping(&s->list, &s->guest_phys_blocks); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1772 | } |
| 1773 | |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1774 | s->nr_cpus = nr_cpus; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1775 | |
| 1776 | get_max_mapnr(s); |
| 1777 | |
| 1778 | uint64_t tmp; |
Andrew Jones | 8161bef | 2016-01-11 20:56:20 +0100 | [diff] [blame] | 1779 | tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), |
| 1780 | s->dump_info.page_size); |
| 1781 | s->len_dump_bitmap = tmp * s->dump_info.page_size; |
qiaonuohan | 7aad248 | 2014-02-18 14:11:31 +0800 | [diff] [blame] | 1782 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1783 | /* init for kdump-compressed format */ |
| 1784 | if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1785 | switch (format) { |
| 1786 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB: |
| 1787 | s->flag_compress = DUMP_DH_COMPRESSED_ZLIB; |
| 1788 | break; |
| 1789 | |
| 1790 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO: |
Laszlo Ersek | c998acb | 2014-05-20 13:42:22 +0200 | [diff] [blame] | 1791 | #ifdef CONFIG_LZO |
| 1792 | if (lzo_init() != LZO_E_OK) { |
| 1793 | error_setg(errp, "failed to initialize the LZO library"); |
| 1794 | goto cleanup; |
| 1795 | } |
| 1796 | #endif |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1797 | s->flag_compress = DUMP_DH_COMPRESSED_LZO; |
| 1798 | break; |
| 1799 | |
| 1800 | case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY: |
| 1801 | s->flag_compress = DUMP_DH_COMPRESSED_SNAPPY; |
| 1802 | break; |
| 1803 | |
| 1804 | default: |
| 1805 | s->flag_compress = 0; |
| 1806 | } |
| 1807 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1808 | return; |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1809 | } |
| 1810 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1811 | if (s->has_filter) { |
| 1812 | memory_mapping_filter(&s->list, s->begin, s->length); |
| 1813 | } |
| 1814 | |
| 1815 | /* |
| 1816 | * calculate phdr_num |
| 1817 | * |
| 1818 | * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow |
| 1819 | */ |
| 1820 | s->phdr_num = 1; /* PT_NOTE */ |
| 1821 | if (s->list.num < UINT16_MAX - 2) { |
| 1822 | s->phdr_num += s->list.num; |
| 1823 | s->have_section = false; |
| 1824 | } else { |
| 1825 | s->have_section = true; |
| 1826 | s->phdr_num = PN_XNUM; |
| 1827 | s->sh_info = 1; /* PT_NOTE */ |
| 1828 | |
| 1829 | /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */ |
| 1830 | if (s->list.num <= UINT32_MAX - 1) { |
| 1831 | s->sh_info += s->list.num; |
| 1832 | } else { |
| 1833 | s->sh_info = UINT32_MAX; |
| 1834 | } |
| 1835 | } |
| 1836 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1837 | if (s->dump_info.d_class == ELFCLASS64) { |
| 1838 | if (s->have_section) { |
| 1839 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1840 | sizeof(Elf64_Phdr) * s->sh_info + |
| 1841 | sizeof(Elf64_Shdr) + s->note_size; |
| 1842 | } else { |
| 1843 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 1844 | sizeof(Elf64_Phdr) * s->phdr_num + s->note_size; |
| 1845 | } |
| 1846 | } else { |
| 1847 | if (s->have_section) { |
| 1848 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1849 | sizeof(Elf32_Phdr) * s->sh_info + |
| 1850 | sizeof(Elf32_Shdr) + s->note_size; |
| 1851 | } else { |
| 1852 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 1853 | sizeof(Elf32_Phdr) * s->phdr_num + s->note_size; |
| 1854 | } |
| 1855 | } |
| 1856 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1857 | return; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1858 | |
| 1859 | cleanup: |
Chen Gang | 2928207 | 2014-08-03 23:28:56 +0800 | [diff] [blame] | 1860 | dump_cleanup(s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1861 | } |
| 1862 | |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1863 | /* this operation might be time consuming. */ |
| 1864 | static void dump_process(DumpState *s, Error **errp) |
| 1865 | { |
| 1866 | Error *local_err = NULL; |
Peter Xu | d42a0d1 | 2016-02-18 13:16:56 +0800 | [diff] [blame] | 1867 | DumpQueryResult *result = NULL; |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1868 | |
| 1869 | if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) { |
| 1870 | create_kdump_vmcore(s, &local_err); |
| 1871 | } else { |
| 1872 | create_vmcore(s, &local_err); |
| 1873 | } |
| 1874 | |
Peter Xu | 39ba2ea | 2016-02-18 13:16:54 +0800 | [diff] [blame] | 1875 | /* make sure status is written after written_size updates */ |
| 1876 | smp_wmb(); |
| 1877 | atomic_set(&s->status, |
| 1878 | (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED)); |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1879 | |
Peter Xu | d42a0d1 | 2016-02-18 13:16:56 +0800 | [diff] [blame] | 1880 | /* send DUMP_COMPLETED message (unconditionally) */ |
| 1881 | result = qmp_query_dump(NULL); |
| 1882 | /* should never fail */ |
| 1883 | assert(result); |
| 1884 | qapi_event_send_dump_completed(result, !!local_err, (local_err ? \ |
| 1885 | error_get_pretty(local_err) : NULL), |
| 1886 | &error_abort); |
| 1887 | qapi_free_DumpQueryResult(result); |
| 1888 | |
Peter Xu | 39ba2ea | 2016-02-18 13:16:54 +0800 | [diff] [blame] | 1889 | error_propagate(errp, local_err); |
Peter Xu | ca1fc8c | 2016-02-18 13:16:50 +0800 | [diff] [blame] | 1890 | dump_cleanup(s); |
| 1891 | } |
| 1892 | |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 1893 | static void *dump_thread(void *data) |
| 1894 | { |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 1895 | DumpState *s = (DumpState *)data; |
Alberto Garcia | c3a8fe3 | 2017-08-29 15:08:36 +0300 | [diff] [blame] | 1896 | dump_process(s, NULL); |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 1897 | return NULL; |
| 1898 | } |
| 1899 | |
Peter Xu | 39ba2ea | 2016-02-18 13:16:54 +0800 | [diff] [blame] | 1900 | DumpQueryResult *qmp_query_dump(Error **errp) |
| 1901 | { |
| 1902 | DumpQueryResult *result = g_new(DumpQueryResult, 1); |
| 1903 | DumpState *state = &dump_state_global; |
| 1904 | result->status = atomic_read(&state->status); |
| 1905 | /* make sure we are reading status and written_size in order */ |
| 1906 | smp_rmb(); |
| 1907 | result->completed = state->written_size; |
| 1908 | result->total = state->total_size; |
| 1909 | return result; |
| 1910 | } |
| 1911 | |
Peter Xu | 228de9c | 2016-02-18 13:16:47 +0800 | [diff] [blame] | 1912 | void qmp_dump_guest_memory(bool paging, const char *file, |
| 1913 | bool has_detach, bool detach, |
| 1914 | bool has_begin, int64_t begin, bool has_length, |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1915 | int64_t length, bool has_format, |
| 1916 | DumpGuestMemoryFormat format, Error **errp) |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1917 | { |
| 1918 | const char *p; |
| 1919 | int fd = -1; |
| 1920 | DumpState *s; |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1921 | Error *local_err = NULL; |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 1922 | bool detach_p = false; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1923 | |
Peter Xu | 63e27f2 | 2016-02-18 13:16:51 +0800 | [diff] [blame] | 1924 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
| 1925 | error_setg(errp, "Dump not allowed during incoming migration."); |
| 1926 | return; |
| 1927 | } |
| 1928 | |
Peter Xu | 65d64f3 | 2016-02-18 13:16:49 +0800 | [diff] [blame] | 1929 | /* if there is a dump in background, we should wait until the dump |
| 1930 | * finished */ |
| 1931 | if (dump_in_progress()) { |
| 1932 | error_setg(errp, "There is a dump in process, please wait."); |
| 1933 | return; |
| 1934 | } |
| 1935 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1936 | /* |
| 1937 | * kdump-compressed format need the whole memory dumped, so paging or |
| 1938 | * filter is not supported here. |
| 1939 | */ |
| 1940 | if ((has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) && |
| 1941 | (paging || has_begin || has_length)) { |
| 1942 | error_setg(errp, "kdump-compressed format doesn't support paging or " |
| 1943 | "filter"); |
| 1944 | return; |
| 1945 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1946 | if (has_begin && !has_length) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1947 | error_setg(errp, QERR_MISSING_PARAMETER, "length"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1948 | return; |
| 1949 | } |
| 1950 | if (!has_begin && has_length) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1951 | error_setg(errp, QERR_MISSING_PARAMETER, "begin"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1952 | return; |
| 1953 | } |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 1954 | if (has_detach) { |
| 1955 | detach_p = detach; |
| 1956 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1957 | |
qiaonuohan | b53ccc3 | 2014-02-18 14:11:36 +0800 | [diff] [blame] | 1958 | /* check whether lzo/snappy is supported */ |
| 1959 | #ifndef CONFIG_LZO |
| 1960 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO) { |
| 1961 | error_setg(errp, "kdump-lzo is not available now"); |
| 1962 | return; |
| 1963 | } |
| 1964 | #endif |
| 1965 | |
| 1966 | #ifndef CONFIG_SNAPPY |
| 1967 | if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY) { |
| 1968 | error_setg(errp, "kdump-snappy is not available now"); |
| 1969 | return; |
| 1970 | } |
| 1971 | #endif |
| 1972 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1973 | #if !defined(WIN32) |
| 1974 | if (strstart(file, "fd:", &p)) { |
Paolo Bonzini | a9940fc | 2012-09-20 16:50:32 +0200 | [diff] [blame] | 1975 | fd = monitor_get_fd(cur_mon, p, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1976 | if (fd == -1) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1977 | return; |
| 1978 | } |
| 1979 | } |
| 1980 | #endif |
| 1981 | |
| 1982 | if (strstart(file, "file:", &p)) { |
| 1983 | fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR); |
| 1984 | if (fd < 0) { |
Luiz Capitulino | 7581766 | 2013-06-07 14:36:01 -0400 | [diff] [blame] | 1985 | error_setg_file_open(errp, errno, p); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1986 | return; |
| 1987 | } |
| 1988 | } |
| 1989 | |
| 1990 | if (fd == -1) { |
Markus Armbruster | c6bd8c7 | 2015-03-17 11:54:50 +0100 | [diff] [blame] | 1991 | error_setg(errp, QERR_INVALID_PARAMETER, "protocol"); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1992 | return; |
| 1993 | } |
| 1994 | |
Peter Xu | baf28f5 | 2016-02-18 13:16:48 +0800 | [diff] [blame] | 1995 | s = &dump_state_global; |
| 1996 | dump_state_prepare(s); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1997 | |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 1998 | dump_init(s, fd, has_format, format, paging, has_begin, |
| 1999 | begin, length, &local_err); |
| 2000 | if (local_err) { |
zhanghailiang | 4c7e251 | 2014-10-09 14:13:11 +0800 | [diff] [blame] | 2001 | error_propagate(errp, local_err); |
Peter Xu | 39ba2ea | 2016-02-18 13:16:54 +0800 | [diff] [blame] | 2002 | atomic_set(&s->status, DUMP_STATUS_FAILED); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 2003 | return; |
| 2004 | } |
| 2005 | |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 2006 | if (detach_p) { |
| 2007 | /* detached dump */ |
Fam Zheng | 6796b40 | 2017-05-03 15:28:19 +0800 | [diff] [blame] | 2008 | s->detached = true; |
Peter Xu | 1fbeff7 | 2016-02-18 13:16:52 +0800 | [diff] [blame] | 2009 | qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread, |
| 2010 | s, QEMU_THREAD_DETACHED); |
| 2011 | } else { |
| 2012 | /* sync dump */ |
| 2013 | dump_process(s, errp); |
| 2014 | } |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 2015 | } |
qiaonuohan | 7d6dc7f | 2014-02-18 14:11:38 +0800 | [diff] [blame] | 2016 | |
| 2017 | DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp) |
| 2018 | { |
| 2019 | DumpGuestMemoryFormatList *item; |
| 2020 | DumpGuestMemoryCapability *cap = |
| 2021 | g_malloc0(sizeof(DumpGuestMemoryCapability)); |
| 2022 | |
| 2023 | /* elf is always available */ |
| 2024 | item = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 2025 | cap->formats = item; |
| 2026 | item->value = DUMP_GUEST_MEMORY_FORMAT_ELF; |
| 2027 | |
| 2028 | /* kdump-zlib is always available */ |
| 2029 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 2030 | item = item->next; |
| 2031 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB; |
| 2032 | |
| 2033 | /* add new item if kdump-lzo is available */ |
| 2034 | #ifdef CONFIG_LZO |
| 2035 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 2036 | item = item->next; |
| 2037 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO; |
| 2038 | #endif |
| 2039 | |
| 2040 | /* add new item if kdump-snappy is available */ |
| 2041 | #ifdef CONFIG_SNAPPY |
| 2042 | item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); |
| 2043 | item = item->next; |
| 2044 | item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY; |
| 2045 | #endif |
| 2046 | |
| 2047 | return cap; |
| 2048 | } |