X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=dump.c;h=78b7d843ceb292db45c43bf94ff64b6eeb608681;hb=a14aa92b20c5482b9b694901304b8100b3c4b5a1;hp=4b2799f80ff4e23329b20d6f23a2cd6982adb4d5;hpb=298f116827405f37dde10a2a6cbc75d20f9ba99c;p=mirror_qemu.git diff --git a/dump.c b/dump.c index 4b2799f80f..78b7d843ce 100644 --- a/dump.c +++ b/dump.c @@ -23,11 +23,23 @@ #include "sysemu/memory_mapping.h" #include "sysemu/cpus.h" #include "qapi/error.h" +#include "qapi/qmp/qerror.h" #include "qmp-commands.h" -static uint16_t cpu_convert_to_target16(uint16_t val, int endian) +#include +#ifdef CONFIG_LZO +#include +#endif +#ifdef CONFIG_SNAPPY +#include +#endif +#ifndef ELF_MACHINE_UNAME +#define ELF_MACHINE_UNAME "Unknown" +#endif + +uint16_t cpu_to_dump16(DumpState *s, uint16_t val) { - if (endian == ELFDATA2LSB) { + if (s->dump_info.d_endian == ELFDATA2LSB) { val = cpu_to_le16(val); } else { val = cpu_to_be16(val); @@ -36,9 +48,9 @@ static uint16_t cpu_convert_to_target16(uint16_t val, int endian) return val; } -static uint32_t cpu_convert_to_target32(uint32_t val, int endian) +uint32_t cpu_to_dump32(DumpState *s, uint32_t val) { - if (endian == ELFDATA2LSB) { + if (s->dump_info.d_endian == ELFDATA2LSB) { val = cpu_to_le32(val); } else { val = cpu_to_be32(val); @@ -47,9 +59,9 @@ static uint32_t cpu_convert_to_target32(uint32_t val, int endian) return val; } -static uint64_t cpu_convert_to_target64(uint64_t val, int endian) +uint64_t cpu_to_dump64(DumpState *s, uint64_t val) { - if (endian == ELFDATA2LSB) { + if (s->dump_info.d_endian == ELFDATA2LSB) { val = cpu_to_le64(val); } else { val = cpu_to_be64(val); @@ -58,58 +70,22 @@ static uint64_t cpu_convert_to_target64(uint64_t val, int endian) return val; } -typedef struct DumpState { - GuestPhysBlockList guest_phys_blocks; - ArchDumpInfo dump_info; - MemoryMappingList list; - uint16_t phdr_num; - uint32_t sh_info; - bool have_section; - bool resume; - ssize_t note_size; - hwaddr memory_offset; - int fd; - - GuestPhysBlock *next_block; - ram_addr_t start; - bool has_filter; - int64_t begin; - int64_t length; - Error **errp; - - uint8_t *note_buf; /* buffer for notes */ - size_t note_buf_offset; /* the writing place in note_buf */ - uint32_t nr_cpus; /* number of guest's cpu */ - size_t page_size; /* guest's page size */ - uint32_t page_shift; /* guest's page shift */ - uint64_t max_mapnr; /* the biggest guest's phys-mem's number */ - size_t len_dump_bitmap; /* the size of the place used to store - dump_bitmap in vmcore */ - off_t offset_dump_bitmap; /* offset of dump_bitmap part in vmcore */ - off_t offset_page; /* offset of page part in vmcore */ - size_t num_dumpable; /* number of page that can be dumped */ - uint32_t flag_compress; /* indicate the compression format */ -} DumpState; - static int dump_cleanup(DumpState *s) { - int ret = 0; - guest_phys_blocks_free(&s->guest_phys_blocks); memory_mapping_list_free(&s->list); - if (s->fd != -1) { - close(s->fd); - } + close(s->fd); if (s->resume) { vm_start(); } - return ret; + return 0; } -static void dump_error(DumpState *s, const char *reason) +static void dump_error(DumpState *s, const char *reason, Error **errp) { dump_cleanup(s); + error_setg(errp, "%s", reason); } static int fd_write_vmcore(const void *buf, size_t size, void *opaque) @@ -125,158 +101,132 @@ static int fd_write_vmcore(const void *buf, size_t size, void *opaque) return 0; } -static int write_elf64_header(DumpState *s) +static void write_elf64_header(DumpState *s, Error **errp) { Elf64_Ehdr elf_header; int ret; - int endian = s->dump_info.d_endian; memset(&elf_header, 0, sizeof(Elf64_Ehdr)); memcpy(&elf_header, ELFMAG, SELFMAG); elf_header.e_ident[EI_CLASS] = ELFCLASS64; elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; elf_header.e_ident[EI_VERSION] = EV_CURRENT; - elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); - elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, - endian); - elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); - elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); - elf_header.e_phoff = cpu_convert_to_target64(sizeof(Elf64_Ehdr), endian); - elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf64_Phdr), - endian); - elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); + elf_header.e_type = cpu_to_dump16(s, ET_CORE); + elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); + elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); + elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); + elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr)); + elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr)); + elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); if (s->have_section) { uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; - elf_header.e_shoff = cpu_convert_to_target64(shoff, endian); - elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf64_Shdr), - endian); - elf_header.e_shnum = cpu_convert_to_target16(1, endian); + elf_header.e_shoff = cpu_to_dump64(s, shoff); + elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr)); + elf_header.e_shnum = cpu_to_dump16(s, 1); } ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); if (ret < 0) { - dump_error(s, "dump: failed to write elf header.\n"); - return -1; + dump_error(s, "dump: failed to write elf header", errp); } - - return 0; } -static int write_elf32_header(DumpState *s) +static void write_elf32_header(DumpState *s, Error **errp) { Elf32_Ehdr elf_header; int ret; - int endian = s->dump_info.d_endian; memset(&elf_header, 0, sizeof(Elf32_Ehdr)); memcpy(&elf_header, ELFMAG, SELFMAG); elf_header.e_ident[EI_CLASS] = ELFCLASS32; - elf_header.e_ident[EI_DATA] = endian; + elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; elf_header.e_ident[EI_VERSION] = EV_CURRENT; - elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); - elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, - endian); - elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); - elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); - elf_header.e_phoff = cpu_convert_to_target32(sizeof(Elf32_Ehdr), endian); - elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf32_Phdr), - endian); - elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); + elf_header.e_type = cpu_to_dump16(s, ET_CORE); + elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine); + elf_header.e_version = cpu_to_dump32(s, EV_CURRENT); + elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header)); + elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr)); + elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr)); + elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num); if (s->have_section) { uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; - elf_header.e_shoff = cpu_convert_to_target32(shoff, endian); - elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf32_Shdr), - endian); - elf_header.e_shnum = cpu_convert_to_target16(1, endian); + elf_header.e_shoff = cpu_to_dump32(s, shoff); + elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr)); + elf_header.e_shnum = cpu_to_dump16(s, 1); } ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); if (ret < 0) { - dump_error(s, "dump: failed to write elf header.\n"); - return -1; + dump_error(s, "dump: failed to write elf header", errp); } - - return 0; } -static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, - int phdr_index, hwaddr offset, - hwaddr filesz) +static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, + int phdr_index, hwaddr offset, + hwaddr filesz, Error **errp) { Elf64_Phdr phdr; int ret; - int endian = s->dump_info.d_endian; memset(&phdr, 0, sizeof(Elf64_Phdr)); - phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); - phdr.p_offset = cpu_convert_to_target64(offset, endian); - phdr.p_paddr = cpu_convert_to_target64(memory_mapping->phys_addr, endian); - phdr.p_filesz = cpu_convert_to_target64(filesz, endian); - phdr.p_memsz = cpu_convert_to_target64(memory_mapping->length, endian); - phdr.p_vaddr = cpu_convert_to_target64(memory_mapping->virt_addr, endian); + phdr.p_type = cpu_to_dump32(s, PT_LOAD); + phdr.p_offset = cpu_to_dump64(s, offset); + phdr.p_paddr = cpu_to_dump64(s, memory_mapping->phys_addr); + phdr.p_filesz = cpu_to_dump64(s, filesz); + phdr.p_memsz = cpu_to_dump64(s, memory_mapping->length); + phdr.p_vaddr = cpu_to_dump64(s, memory_mapping->virt_addr); assert(memory_mapping->length >= filesz); ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table.\n"); - return -1; + dump_error(s, "dump: failed to write program header table", errp); } - - return 0; } -static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, - int phdr_index, hwaddr offset, - hwaddr filesz) +static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, + int phdr_index, hwaddr offset, + hwaddr filesz, Error **errp) { Elf32_Phdr phdr; int ret; - int endian = s->dump_info.d_endian; memset(&phdr, 0, sizeof(Elf32_Phdr)); - phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); - phdr.p_offset = cpu_convert_to_target32(offset, endian); - phdr.p_paddr = cpu_convert_to_target32(memory_mapping->phys_addr, endian); - phdr.p_filesz = cpu_convert_to_target32(filesz, endian); - phdr.p_memsz = cpu_convert_to_target32(memory_mapping->length, endian); - phdr.p_vaddr = cpu_convert_to_target32(memory_mapping->virt_addr, endian); + phdr.p_type = cpu_to_dump32(s, PT_LOAD); + phdr.p_offset = cpu_to_dump32(s, offset); + phdr.p_paddr = cpu_to_dump32(s, memory_mapping->phys_addr); + phdr.p_filesz = cpu_to_dump32(s, filesz); + phdr.p_memsz = cpu_to_dump32(s, memory_mapping->length); + phdr.p_vaddr = cpu_to_dump32(s, memory_mapping->virt_addr); assert(memory_mapping->length >= filesz); ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table.\n"); - return -1; + dump_error(s, "dump: failed to write program header table", errp); } - - return 0; } -static int write_elf64_note(DumpState *s) +static void write_elf64_note(DumpState *s, Error **errp) { Elf64_Phdr phdr; - int endian = s->dump_info.d_endian; hwaddr begin = s->memory_offset - s->note_size; int ret; memset(&phdr, 0, sizeof(Elf64_Phdr)); - phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); - phdr.p_offset = cpu_convert_to_target64(begin, endian); + phdr.p_type = cpu_to_dump32(s, PT_NOTE); + phdr.p_offset = cpu_to_dump64(s, begin); phdr.p_paddr = 0; - phdr.p_filesz = cpu_convert_to_target64(s->note_size, endian); - phdr.p_memsz = cpu_convert_to_target64(s->note_size, endian); + phdr.p_filesz = cpu_to_dump64(s, s->note_size); + phdr.p_memsz = cpu_to_dump64(s, s->note_size); phdr.p_vaddr = 0; ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table.\n"); - return -1; + dump_error(s, "dump: failed to write program header table", errp); } - - return 0; } static inline int cpu_index(CPUState *cpu) @@ -284,7 +234,8 @@ static inline int cpu_index(CPUState *cpu) return cpu->cpu_index + 1; } -static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s) +static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s, + Error **errp) { CPUState *cpu; int ret; @@ -294,47 +245,42 @@ static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s) id = cpu_index(cpu); ret = cpu_write_elf64_note(f, cpu, id, s); if (ret < 0) { - dump_error(s, "dump: failed to write elf notes.\n"); - return -1; + dump_error(s, "dump: failed to write elf notes", errp); + return; } } CPU_FOREACH(cpu) { ret = cpu_write_elf64_qemunote(f, cpu, s); if (ret < 0) { - dump_error(s, "dump: failed to write CPU status.\n"); - return -1; + dump_error(s, "dump: failed to write CPU status", errp); + return; } } - - return 0; } -static int write_elf32_note(DumpState *s) +static void write_elf32_note(DumpState *s, Error **errp) { hwaddr begin = s->memory_offset - s->note_size; Elf32_Phdr phdr; - int endian = s->dump_info.d_endian; int ret; memset(&phdr, 0, sizeof(Elf32_Phdr)); - phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); - phdr.p_offset = cpu_convert_to_target32(begin, endian); + phdr.p_type = cpu_to_dump32(s, PT_NOTE); + phdr.p_offset = cpu_to_dump32(s, begin); phdr.p_paddr = 0; - phdr.p_filesz = cpu_convert_to_target32(s->note_size, endian); - phdr.p_memsz = cpu_convert_to_target32(s->note_size, endian); + phdr.p_filesz = cpu_to_dump32(s, s->note_size); + phdr.p_memsz = cpu_to_dump32(s, s->note_size); phdr.p_vaddr = 0; ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); if (ret < 0) { - dump_error(s, "dump: failed to write program header table.\n"); - return -1; + dump_error(s, "dump: failed to write program header table", errp); } - - return 0; } -static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s) +static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s, + Error **errp) { CPUState *cpu; int ret; @@ -344,27 +290,24 @@ static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s) id = cpu_index(cpu); ret = cpu_write_elf32_note(f, cpu, id, s); if (ret < 0) { - dump_error(s, "dump: failed to write elf notes.\n"); - return -1; + dump_error(s, "dump: failed to write elf notes", errp); + return; } } CPU_FOREACH(cpu) { ret = cpu_write_elf32_qemunote(f, cpu, s); if (ret < 0) { - dump_error(s, "dump: failed to write CPU status.\n"); - return -1; + dump_error(s, "dump: failed to write CPU status", errp); + return; } } - - return 0; } -static int write_elf_section(DumpState *s, int type) +static void write_elf_section(DumpState *s, int type, Error **errp) { Elf32_Shdr shdr32; Elf64_Shdr shdr64; - int endian = s->dump_info.d_endian; int shdr_size; void *shdr; int ret; @@ -372,61 +315,55 @@ static int write_elf_section(DumpState *s, int type) if (type == 0) { shdr_size = sizeof(Elf32_Shdr); memset(&shdr32, 0, shdr_size); - shdr32.sh_info = cpu_convert_to_target32(s->sh_info, endian); + shdr32.sh_info = cpu_to_dump32(s, s->sh_info); shdr = &shdr32; } else { shdr_size = sizeof(Elf64_Shdr); memset(&shdr64, 0, shdr_size); - shdr64.sh_info = cpu_convert_to_target32(s->sh_info, endian); + shdr64.sh_info = cpu_to_dump32(s, s->sh_info); shdr = &shdr64; } ret = fd_write_vmcore(&shdr, shdr_size, s); if (ret < 0) { - dump_error(s, "dump: failed to write section header table.\n"); - return -1; + dump_error(s, "dump: failed to write section header table", errp); } - - return 0; } -static int write_data(DumpState *s, void *buf, int length) +static void write_data(DumpState *s, void *buf, int length, Error **errp) { int ret; ret = fd_write_vmcore(buf, length, s); if (ret < 0) { - dump_error(s, "dump: failed to save memory.\n"); - return -1; + dump_error(s, "dump: failed to save memory", errp); } - - return 0; } -/* write the memroy to vmcore. 1 page per I/O. */ -static int write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, - int64_t size) +/* write the memory to vmcore. 1 page per I/O. */ +static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, + int64_t size, Error **errp) { int64_t i; - int ret; + Error *local_err = NULL; for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { - ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, - TARGET_PAGE_SIZE); - if (ret < 0) { - return ret; + write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, + TARGET_PAGE_SIZE, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } } if ((size % TARGET_PAGE_SIZE) != 0) { - ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, - size % TARGET_PAGE_SIZE); - if (ret < 0) { - return ret; + write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE, + size % TARGET_PAGE_SIZE, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } } - - return 0; } /* get the memory's offset and size in the vmcore */ @@ -491,13 +428,13 @@ static void get_offset_range(hwaddr phys_addr, } } -static int write_elf_loads(DumpState *s) +static void write_elf_loads(DumpState *s, Error **errp) { hwaddr offset, filesz; MemoryMapping *memory_mapping; uint32_t phdr_index = 1; - int ret; uint32_t max_index; + Error *local_err = NULL; if (s->have_section) { max_index = s->sh_info; @@ -510,29 +447,28 @@ static int write_elf_loads(DumpState *s) memory_mapping->length, s, &offset, &filesz); if (s->dump_info.d_class == ELFCLASS64) { - ret = write_elf64_load(s, memory_mapping, phdr_index++, offset, - filesz); + write_elf64_load(s, memory_mapping, phdr_index++, offset, + filesz, &local_err); } else { - ret = write_elf32_load(s, memory_mapping, phdr_index++, offset, - filesz); + write_elf32_load(s, memory_mapping, phdr_index++, offset, + filesz, &local_err); } - if (ret < 0) { - return -1; + if (local_err) { + error_propagate(errp, local_err); + return; } if (phdr_index >= max_index) { break; } } - - return 0; } /* write elf header, PT_NOTE and elf note to vmcore. */ -static int dump_begin(DumpState *s) +static void dump_begin(DumpState *s, Error **errp) { - int ret; + Error *local_err = NULL; /* * the vmcore's format is: @@ -560,69 +496,81 @@ static int dump_begin(DumpState *s) /* write elf header to vmcore */ if (s->dump_info.d_class == ELFCLASS64) { - ret = write_elf64_header(s); + write_elf64_header(s, &local_err); } else { - ret = write_elf32_header(s); + write_elf32_header(s, &local_err); } - if (ret < 0) { - return -1; + if (local_err) { + error_propagate(errp, local_err); + return; } if (s->dump_info.d_class == ELFCLASS64) { /* write PT_NOTE to vmcore */ - if (write_elf64_note(s) < 0) { - return -1; + write_elf64_note(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } /* write all PT_LOAD to vmcore */ - if (write_elf_loads(s) < 0) { - return -1; + write_elf_loads(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } /* write section to vmcore */ if (s->have_section) { - if (write_elf_section(s, 1) < 0) { - return -1; + write_elf_section(s, 1, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } } /* write notes to vmcore */ - if (write_elf64_notes(fd_write_vmcore, s) < 0) { - return -1; + write_elf64_notes(fd_write_vmcore, s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } - } else { /* write PT_NOTE to vmcore */ - if (write_elf32_note(s) < 0) { - return -1; + write_elf32_note(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } /* write all PT_LOAD to vmcore */ - if (write_elf_loads(s) < 0) { - return -1; + write_elf_loads(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } /* write section to vmcore */ if (s->have_section) { - if (write_elf_section(s, 0) < 0) { - return -1; + write_elf_section(s, 0, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } } /* write notes to vmcore */ - if (write_elf32_notes(fd_write_vmcore, s) < 0) { - return -1; + write_elf32_notes(fd_write_vmcore, s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } } - - return 0; } -/* write PT_LOAD to vmcore */ -static int dump_completed(DumpState *s) +static void dump_completed(DumpState *s) { dump_cleanup(s); - return 0; } static int get_next_block(DumpState *s, GuestPhysBlock *block) @@ -653,13 +601,13 @@ static int get_next_block(DumpState *s, GuestPhysBlock *block) } /* write all memory to vmcore */ -static int dump_iterate(DumpState *s) +static void dump_iterate(DumpState *s, Error **errp) { GuestPhysBlock *block; int64_t size; - int ret; + Error *local_err = NULL; - while (1) { + do { block = s->next_block; size = block->target_end - block->target_start; @@ -669,59 +617,51 @@ static int dump_iterate(DumpState *s) size -= block->target_end - (s->begin + s->length); } } - ret = write_memory(s, block, s->start, size); - if (ret == -1) { - return ret; + write_memory(s, block, s->start, size, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } - ret = get_next_block(s, block); - if (ret == 1) { - dump_completed(s); - return 0; - } - } + } while (!get_next_block(s, block)); + + dump_completed(s); } -static int create_vmcore(DumpState *s) +static void create_vmcore(DumpState *s, Error **errp) { - int ret; + Error *local_err = NULL; - ret = dump_begin(s); - if (ret < 0) { - return -1; - } - - ret = dump_iterate(s); - if (ret < 0) { - return -1; + dump_begin(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; } - return 0; + dump_iterate(s, errp); } static int write_start_flat_header(int fd) { - uint8_t *buf; - MakedumpfileHeader mh; + MakedumpfileHeader *mh; int ret = 0; - memset(&mh, 0, sizeof(mh)); - strncpy(mh.signature, MAKEDUMPFILE_SIGNATURE, - strlen(MAKEDUMPFILE_SIGNATURE)); + QEMU_BUILD_BUG_ON(sizeof *mh > MAX_SIZE_MDF_HEADER); + mh = g_malloc0(MAX_SIZE_MDF_HEADER); - mh.type = cpu_to_be64(TYPE_FLAT_HEADER); - mh.version = cpu_to_be64(VERSION_FLAT_HEADER); + memcpy(mh->signature, MAKEDUMPFILE_SIGNATURE, + MIN(sizeof mh->signature, sizeof MAKEDUMPFILE_SIGNATURE)); - buf = g_malloc0(MAX_SIZE_MDF_HEADER); - memcpy(buf, &mh, sizeof(mh)); + mh->type = cpu_to_be64(TYPE_FLAT_HEADER); + mh->version = cpu_to_be64(VERSION_FLAT_HEADER); size_t written_size; - written_size = qemu_write_full(fd, buf, MAX_SIZE_MDF_HEADER); + written_size = qemu_write_full(fd, mh, MAX_SIZE_MDF_HEADER); if (written_size != MAX_SIZE_MDF_HEADER) { ret = -1; } - g_free(buf); + g_free(mh); return ret; } @@ -779,37 +719,35 @@ static int buf_write_note(const void *buf, size_t size, void *opaque) } /* write common header, sub header and elf note to vmcore */ -static int create_header32(DumpState *s) +static void create_header32(DumpState *s, Error **errp) { - int ret = 0; DiskDumpHeader32 *dh = NULL; KdumpSubHeader32 *kh = NULL; size_t size; - int endian = s->dump_info.d_endian; uint32_t block_size; uint32_t sub_hdr_size; uint32_t bitmap_blocks; uint32_t status = 0; uint64_t offset_note; + Error *local_err = NULL; /* write common header, the version of kdump-compressed format is 6th */ size = sizeof(DiskDumpHeader32); dh = g_malloc0(size); strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); - dh->header_version = cpu_convert_to_target32(6, endian); - block_size = s->page_size; - dh->block_size = cpu_convert_to_target32(block_size, endian); + dh->header_version = cpu_to_dump32(s, 6); + block_size = TARGET_PAGE_SIZE; + dh->block_size = cpu_to_dump32(s, block_size); sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size; sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); - dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian); + dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ - dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX), - endian); - dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian); + dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); + dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; - dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian); - memcpy(&(dh->utsname.machine), "i686", 4); + dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); + strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { status |= DUMP_DH_COMPRESSED_ZLIB; @@ -824,11 +762,10 @@ static int create_header32(DumpState *s) status |= DUMP_DH_COMPRESSED_SNAPPY; } #endif - dh->status = cpu_convert_to_target32(status, endian); + dh->status = cpu_to_dump32(s, status); if (write_buffer(s->fd, 0, dh, size) < 0) { - dump_error(s, "dump: failed to write disk dump header.\n"); - ret = -1; + dump_error(s, "dump: failed to write disk dump header", errp); goto out; } @@ -837,18 +774,17 @@ static int create_header32(DumpState *s) kh = g_malloc0(size); /* 64bit max_mapnr_64 */ - kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian); - kh->phys_base = cpu_convert_to_target32(PHYS_BASE, endian); - kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian); + kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); + kh->phys_base = cpu_to_dump32(s, PHYS_BASE); + kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; - kh->offset_note = cpu_convert_to_target64(offset_note, endian); - kh->note_size = cpu_convert_to_target32(s->note_size, endian); + kh->offset_note = cpu_to_dump64(s, offset_note); + kh->note_size = cpu_to_dump32(s, s->note_size); if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * block_size, kh, size) < 0) { - dump_error(s, "dump: failed to write kdump sub header.\n"); - ret = -1; + dump_error(s, "dump: failed to write kdump sub header", errp); goto out; } @@ -857,15 +793,14 @@ static int create_header32(DumpState *s) s->note_buf_offset = 0; /* use s->note_buf to store notes temporarily */ - if (write_elf32_notes(buf_write_note, s) < 0) { - ret = -1; + write_elf32_notes(buf_write_note, s, &local_err); + if (local_err) { + error_propagate(errp, local_err); goto out; } - if (write_buffer(s->fd, offset_note, s->note_buf, s->note_size) < 0) { - dump_error(s, "dump: failed to write notes"); - ret = -1; + dump_error(s, "dump: failed to write notes", errp); goto out; } @@ -881,42 +816,38 @@ out: g_free(dh); g_free(kh); g_free(s->note_buf); - - return ret; } /* write common header, sub header and elf note to vmcore */ -static int create_header64(DumpState *s) +static void create_header64(DumpState *s, Error **errp) { - int ret = 0; DiskDumpHeader64 *dh = NULL; KdumpSubHeader64 *kh = NULL; size_t size; - int endian = s->dump_info.d_endian; uint32_t block_size; uint32_t sub_hdr_size; uint32_t bitmap_blocks; uint32_t status = 0; uint64_t offset_note; + Error *local_err = NULL; /* write common header, the version of kdump-compressed format is 6th */ size = sizeof(DiskDumpHeader64); dh = g_malloc0(size); strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE)); - dh->header_version = cpu_convert_to_target32(6, endian); - block_size = s->page_size; - dh->block_size = cpu_convert_to_target32(block_size, endian); + dh->header_version = cpu_to_dump32(s, 6); + block_size = TARGET_PAGE_SIZE; + dh->block_size = cpu_to_dump32(s, block_size); sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size; sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size); - dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian); + dh->sub_hdr_size = cpu_to_dump32(s, sub_hdr_size); /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */ - dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX), - endian); - dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian); + dh->max_mapnr = cpu_to_dump32(s, MIN(s->max_mapnr, UINT_MAX)); + dh->nr_cpus = cpu_to_dump32(s, s->nr_cpus); bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2; - dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian); - memcpy(&(dh->utsname.machine), "x86_64", 6); + dh->bitmap_blocks = cpu_to_dump32(s, bitmap_blocks); + strncpy(dh->utsname.machine, ELF_MACHINE_UNAME, sizeof(dh->utsname.machine)); if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) { status |= DUMP_DH_COMPRESSED_ZLIB; @@ -931,11 +862,10 @@ static int create_header64(DumpState *s) status |= DUMP_DH_COMPRESSED_SNAPPY; } #endif - dh->status = cpu_convert_to_target32(status, endian); + dh->status = cpu_to_dump32(s, status); if (write_buffer(s->fd, 0, dh, size) < 0) { - dump_error(s, "dump: failed to write disk dump header.\n"); - ret = -1; + dump_error(s, "dump: failed to write disk dump header", errp); goto out; } @@ -944,18 +874,17 @@ static int create_header64(DumpState *s) kh = g_malloc0(size); /* 64bit max_mapnr_64 */ - kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian); - kh->phys_base = cpu_convert_to_target64(PHYS_BASE, endian); - kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian); + kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr); + kh->phys_base = cpu_to_dump64(s, PHYS_BASE); + kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL); offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size; - kh->offset_note = cpu_convert_to_target64(offset_note, endian); - kh->note_size = cpu_convert_to_target64(s->note_size, endian); + kh->offset_note = cpu_to_dump64(s, offset_note); + kh->note_size = cpu_to_dump64(s, s->note_size); if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS * block_size, kh, size) < 0) { - dump_error(s, "dump: failed to write kdump sub header.\n"); - ret = -1; + dump_error(s, "dump: failed to write kdump sub header", errp); goto out; } @@ -964,15 +893,15 @@ static int create_header64(DumpState *s) s->note_buf_offset = 0; /* use s->note_buf to store notes temporarily */ - if (write_elf64_notes(buf_write_note, s) < 0) { - ret = -1; + write_elf64_notes(buf_write_note, s, &local_err); + if (local_err) { + error_propagate(errp, local_err); goto out; } if (write_buffer(s->fd, offset_note, s->note_buf, s->note_size) < 0) { - dump_error(s, "dump: failed to write notes"); - ret = -1; + dump_error(s, "dump: failed to write notes", errp); goto out; } @@ -988,17 +917,484 @@ out: g_free(dh); g_free(kh); g_free(s->note_buf); +} - return ret; +static void write_dump_header(DumpState *s, Error **errp) +{ + Error *local_err = NULL; + + if (s->dump_info.d_class == ELFCLASS32) { + create_header32(s, &local_err); + } else { + create_header64(s, &local_err); + } + if (local_err) { + error_propagate(errp, local_err); + } } -static int write_dump_header(DumpState *s) +/* + * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be + * rewritten, so if need to set the first bit, set last_pfn and pfn to 0. + * set_dump_bitmap will always leave the recently set bit un-sync. And setting + * (last bit + sizeof(buf) * 8) to 0 will do flushing the content in buf into + * vmcore, ie. synchronizing un-sync bit into vmcore. + */ +static int set_dump_bitmap(uint64_t last_pfn, uint64_t pfn, bool value, + uint8_t *buf, DumpState *s) { - if (s->dump_info.d_machine == EM_386) { - return create_header32(s); + off_t old_offset, new_offset; + off_t offset_bitmap1, offset_bitmap2; + uint32_t byte, bit; + + /* should not set the previous place */ + assert(last_pfn <= pfn); + + /* + * if the bit needed to be set is not cached in buf, flush the data in buf + * to vmcore firstly. + * making new_offset be bigger than old_offset can also sync remained data + * into vmcore. + */ + old_offset = BUFSIZE_BITMAP * (last_pfn / PFN_BUFBITMAP); + new_offset = BUFSIZE_BITMAP * (pfn / PFN_BUFBITMAP); + + while (old_offset < new_offset) { + /* calculate the offset and write dump_bitmap */ + offset_bitmap1 = s->offset_dump_bitmap + old_offset; + if (write_buffer(s->fd, offset_bitmap1, buf, + BUFSIZE_BITMAP) < 0) { + return -1; + } + + /* dump level 1 is chosen, so 1st and 2nd bitmap are same */ + offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap + + old_offset; + if (write_buffer(s->fd, offset_bitmap2, buf, + BUFSIZE_BITMAP) < 0) { + return -1; + } + + memset(buf, 0, BUFSIZE_BITMAP); + old_offset += BUFSIZE_BITMAP; + } + + /* get the exact place of the bit in the buf, and set it */ + byte = (pfn % PFN_BUFBITMAP) / CHAR_BIT; + bit = (pfn % PFN_BUFBITMAP) % CHAR_BIT; + if (value) { + buf[byte] |= 1u << bit; } else { - return create_header64(s); + buf[byte] &= ~(1u << bit); + } + + return 0; +} + +/* + * exam every page and return the page frame number and the address of the page. + * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys + * blocks, so block->target_start and block->target_end should be interal + * multiples of the target page size. + */ +static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr, + uint8_t **bufptr, DumpState *s) +{ + GuestPhysBlock *block = *blockptr; + hwaddr addr; + uint8_t *buf; + + /* block == NULL means the start of the iteration */ + if (!block) { + block = QTAILQ_FIRST(&s->guest_phys_blocks.head); + *blockptr = block; + assert((block->target_start & ~TARGET_PAGE_MASK) == 0); + assert((block->target_end & ~TARGET_PAGE_MASK) == 0); + *pfnptr = paddr_to_pfn(block->target_start); + if (bufptr) { + *bufptr = block->host_addr; + } + return true; + } + + *pfnptr = *pfnptr + 1; + addr = pfn_to_paddr(*pfnptr); + + if ((addr >= block->target_start) && + (addr + TARGET_PAGE_SIZE <= block->target_end)) { + buf = block->host_addr + (addr - block->target_start); + } else { + /* the next page is in the next block */ + block = QTAILQ_NEXT(block, next); + *blockptr = block; + if (!block) { + return false; + } + assert((block->target_start & ~TARGET_PAGE_MASK) == 0); + assert((block->target_end & ~TARGET_PAGE_MASK) == 0); + *pfnptr = paddr_to_pfn(block->target_start); + buf = block->host_addr; + } + + if (bufptr) { + *bufptr = buf; + } + + return true; +} + +static void write_dump_bitmap(DumpState *s, Error **errp) +{ + int ret = 0; + uint64_t last_pfn, pfn; + void *dump_bitmap_buf; + size_t num_dumpable; + GuestPhysBlock *block_iter = NULL; + + /* dump_bitmap_buf is used to store dump_bitmap temporarily */ + dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP); + + num_dumpable = 0; + last_pfn = 0; + + /* + * exam memory page by page, and set the bit in dump_bitmap corresponded + * to the existing page. + */ + while (get_next_page(&block_iter, &pfn, NULL, s)) { + ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s); + if (ret < 0) { + dump_error(s, "dump: failed to set dump_bitmap", errp); + goto out; + } + + last_pfn = pfn; + num_dumpable++; + } + + /* + * set_dump_bitmap will always leave the recently set bit un-sync. Here we + * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be + * synchronized into vmcore. + */ + if (num_dumpable > 0) { + ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false, + dump_bitmap_buf, s); + if (ret < 0) { + dump_error(s, "dump: failed to sync dump_bitmap", errp); + goto out; + } } + + /* number of dumpable pages that will be dumped later */ + s->num_dumpable = num_dumpable; + +out: + g_free(dump_bitmap_buf); +} + +static void prepare_data_cache(DataCache *data_cache, DumpState *s, + off_t offset) +{ + data_cache->fd = s->fd; + data_cache->data_size = 0; + data_cache->buf_size = BUFSIZE_DATA_CACHE; + data_cache->buf = g_malloc0(BUFSIZE_DATA_CACHE); + data_cache->offset = offset; +} + +static int write_cache(DataCache *dc, const void *buf, size_t size, + bool flag_sync) +{ + /* + * dc->buf_size should not be less than size, otherwise dc will never be + * enough + */ + assert(size <= dc->buf_size); + + /* + * if flag_sync is set, synchronize data in dc->buf into vmcore. + * otherwise check if the space is enough for caching data in buf, if not, + * write the data in dc->buf to dc->fd and reset dc->buf + */ + if ((!flag_sync && dc->data_size + size > dc->buf_size) || + (flag_sync && dc->data_size > 0)) { + if (write_buffer(dc->fd, dc->offset, dc->buf, dc->data_size) < 0) { + return -1; + } + + dc->offset += dc->data_size; + dc->data_size = 0; + } + + if (!flag_sync) { + memcpy(dc->buf + dc->data_size, buf, size); + dc->data_size += size; + } + + return 0; +} + +static void free_data_cache(DataCache *data_cache) +{ + g_free(data_cache->buf); +} + +static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress) +{ + switch (flag_compress) { + case DUMP_DH_COMPRESSED_ZLIB: + return compressBound(page_size); + + case DUMP_DH_COMPRESSED_LZO: + /* + * LZO will expand incompressible data by a little amount. Please check + * the following URL to see the expansion calculation: + * http://www.oberhumer.com/opensource/lzo/lzofaq.php + */ + return page_size + page_size / 16 + 64 + 3; + +#ifdef CONFIG_SNAPPY + case DUMP_DH_COMPRESSED_SNAPPY: + return snappy_max_compressed_length(page_size); +#endif + } + return 0; +} + +/* + * check if the page is all 0 + */ +static inline bool is_zero_page(const uint8_t *buf, size_t page_size) +{ + return buffer_is_zero(buf, page_size); +} + +static void write_dump_pages(DumpState *s, Error **errp) +{ + int ret = 0; + DataCache page_desc, page_data; + size_t len_buf_out, size_out; +#ifdef CONFIG_LZO + lzo_bytep wrkmem = NULL; +#endif + uint8_t *buf_out = NULL; + off_t offset_desc, offset_data; + PageDescriptor pd, pd_zero; + uint8_t *buf; + GuestPhysBlock *block_iter = NULL; + uint64_t pfn_iter; + + /* get offset of page_desc and page_data in dump file */ + offset_desc = s->offset_page; + offset_data = offset_desc + sizeof(PageDescriptor) * s->num_dumpable; + + prepare_data_cache(&page_desc, s, offset_desc); + prepare_data_cache(&page_data, s, offset_data); + + /* prepare buffer to store compressed data */ + len_buf_out = get_len_buf_out(TARGET_PAGE_SIZE, s->flag_compress); + assert(len_buf_out != 0); + +#ifdef CONFIG_LZO + wrkmem = g_malloc(LZO1X_1_MEM_COMPRESS); +#endif + + buf_out = g_malloc(len_buf_out); + + /* + * init zero page's page_desc and page_data, because every zero page + * uses the same page_data + */ + pd_zero.size = cpu_to_dump32(s, TARGET_PAGE_SIZE); + pd_zero.flags = cpu_to_dump32(s, 0); + pd_zero.offset = cpu_to_dump64(s, offset_data); + pd_zero.page_flags = cpu_to_dump64(s, 0); + buf = g_malloc0(TARGET_PAGE_SIZE); + ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); + g_free(buf); + if (ret < 0) { + dump_error(s, "dump: failed to write page data (zero page)", errp); + goto out; + } + + offset_data += TARGET_PAGE_SIZE; + + /* + * dump memory to vmcore page by page. zero page will all be resided in the + * first page of page section + */ + while (get_next_page(&block_iter, &pfn_iter, &buf, s)) { + /* check zero page */ + if (is_zero_page(buf, TARGET_PAGE_SIZE)) { + ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor), + false); + if (ret < 0) { + dump_error(s, "dump: failed to write page desc", errp); + goto out; + } + } else { + /* + * not zero page, then: + * 1. compress the page + * 2. write the compressed page into the cache of page_data + * 3. get page desc of the compressed page and write it into the + * cache of page_desc + * + * only one compression format will be used here, for + * s->flag_compress is set. But when compression fails to work, + * we fall back to save in plaintext. + */ + size_out = len_buf_out; + if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) && + (compress2(buf_out, (uLongf *)&size_out, buf, + TARGET_PAGE_SIZE, Z_BEST_SPEED) == Z_OK) && + (size_out < TARGET_PAGE_SIZE)) { + pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_ZLIB); + pd.size = cpu_to_dump32(s, size_out); + + ret = write_cache(&page_data, buf_out, size_out, false); + if (ret < 0) { + dump_error(s, "dump: failed to write page data", errp); + goto out; + } +#ifdef CONFIG_LZO + } else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) && + (lzo1x_1_compress(buf, TARGET_PAGE_SIZE, buf_out, + (lzo_uint *)&size_out, wrkmem) == LZO_E_OK) && + (size_out < TARGET_PAGE_SIZE)) { + pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_LZO); + pd.size = cpu_to_dump32(s, size_out); + + ret = write_cache(&page_data, buf_out, size_out, false); + if (ret < 0) { + dump_error(s, "dump: failed to write page data", errp); + goto out; + } +#endif +#ifdef CONFIG_SNAPPY + } else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) && + (snappy_compress((char *)buf, TARGET_PAGE_SIZE, + (char *)buf_out, &size_out) == SNAPPY_OK) && + (size_out < TARGET_PAGE_SIZE)) { + pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_SNAPPY); + pd.size = cpu_to_dump32(s, size_out); + + ret = write_cache(&page_data, buf_out, size_out, false); + if (ret < 0) { + dump_error(s, "dump: failed to write page data", errp); + goto out; + } +#endif + } else { + /* + * fall back to save in plaintext, size_out should be + * assigned TARGET_PAGE_SIZE + */ + pd.flags = cpu_to_dump32(s, 0); + size_out = TARGET_PAGE_SIZE; + pd.size = cpu_to_dump32(s, size_out); + + ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false); + if (ret < 0) { + dump_error(s, "dump: failed to write page data", errp); + goto out; + } + } + + /* get and write page desc here */ + pd.page_flags = cpu_to_dump64(s, 0); + pd.offset = cpu_to_dump64(s, offset_data); + offset_data += size_out; + + ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false); + if (ret < 0) { + dump_error(s, "dump: failed to write page desc", errp); + goto out; + } + } + } + + ret = write_cache(&page_desc, NULL, 0, true); + if (ret < 0) { + dump_error(s, "dump: failed to sync cache for page_desc", errp); + goto out; + } + ret = write_cache(&page_data, NULL, 0, true); + if (ret < 0) { + dump_error(s, "dump: failed to sync cache for page_data", errp); + goto out; + } + +out: + free_data_cache(&page_desc); + free_data_cache(&page_data); + +#ifdef CONFIG_LZO + g_free(wrkmem); +#endif + + g_free(buf_out); +} + +static void create_kdump_vmcore(DumpState *s, Error **errp) +{ + int ret; + Error *local_err = NULL; + + /* + * the kdump-compressed format is: + * File offset + * +------------------------------------------+ 0x0 + * | main header (struct disk_dump_header) | + * |------------------------------------------+ block 1 + * | sub header (struct kdump_sub_header) | + * |------------------------------------------+ block 2 + * | 1st-dump_bitmap | + * |------------------------------------------+ block 2 + X blocks + * | 2nd-dump_bitmap | (aligned by block) + * |------------------------------------------+ block 2 + 2 * X blocks + * | page desc for pfn 0 (struct page_desc) | (aligned by block) + * | page desc for pfn 1 (struct page_desc) | + * | : | + * |------------------------------------------| (not aligned by block) + * | page data (pfn 0) | + * | page data (pfn 1) | + * | : | + * +------------------------------------------+ + */ + + ret = write_start_flat_header(s->fd); + if (ret < 0) { + dump_error(s, "dump: failed to write start flat header", errp); + return; + } + + write_dump_header(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + write_dump_bitmap(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + write_dump_pages(s, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + ret = write_end_flat_header(s->fd); + if (ret < 0) { + dump_error(s, "dump: failed to write end flat header", errp); + return; + } + + dump_completed(s); } static ram_addr_t get_start_block(DumpState *s) @@ -1034,17 +1430,23 @@ static void get_max_mapnr(DumpState *s) GuestPhysBlock *last_block; last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead); - s->max_mapnr = paddr_to_pfn(last_block->target_end, s->page_shift); + s->max_mapnr = paddr_to_pfn(last_block->target_end); } -static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, - int64_t begin, int64_t length, Error **errp) +static void dump_init(DumpState *s, int fd, bool has_format, + DumpGuestMemoryFormat format, bool paging, bool has_filter, + int64_t begin, int64_t length, Error **errp) { CPUState *cpu; int nr_cpus; Error *err = NULL; int ret; + /* kdump-compressed is conflict with paging and filter */ + if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { + assert(!paging && !has_filter); + } + if (runstate_is_running()) { vm_stop(RUN_STATE_SAVE_VM); s->resume = true; @@ -1061,18 +1463,19 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, nr_cpus++; } - s->errp = errp; s->fd = fd; s->has_filter = has_filter; s->begin = begin; s->length = length; + memory_mapping_list_init(&s->list); + guest_phys_blocks_init(&s->guest_phys_blocks); guest_phys_blocks_append(&s->guest_phys_blocks); s->start = get_start_block(s); if (s->start == -1) { - error_set(errp, QERR_INVALID_PARAMETER, "begin"); + error_setg(errp, QERR_INVALID_PARAMETER, "begin"); goto cleanup; } @@ -1082,19 +1485,18 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, */ ret = cpu_get_dump_info(&s->dump_info, &s->guest_phys_blocks); if (ret < 0) { - error_set(errp, QERR_UNSUPPORTED); + error_setg(errp, QERR_UNSUPPORTED); goto cleanup; } s->note_size = cpu_get_note_size(s->dump_info.d_class, s->dump_info.d_machine, nr_cpus); if (s->note_size < 0) { - error_set(errp, QERR_UNSUPPORTED); + error_setg(errp, QERR_UNSUPPORTED); goto cleanup; } /* get memory mapping */ - memory_mapping_list_init(&s->list); if (paging) { qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err); if (err != NULL) { @@ -1106,14 +1508,40 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, } s->nr_cpus = nr_cpus; - s->page_size = TARGET_PAGE_SIZE; - s->page_shift = ffs(s->page_size) - 1; get_max_mapnr(s); uint64_t tmp; - tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), s->page_size); - s->len_dump_bitmap = tmp * s->page_size; + tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), TARGET_PAGE_SIZE); + s->len_dump_bitmap = tmp * TARGET_PAGE_SIZE; + + /* init for kdump-compressed format */ + if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { + switch (format) { + case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB: + s->flag_compress = DUMP_DH_COMPRESSED_ZLIB; + break; + + case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO: +#ifdef CONFIG_LZO + if (lzo_init() != LZO_E_OK) { + error_setg(errp, "failed to initialize the LZO library"); + goto cleanup; + } +#endif + s->flag_compress = DUMP_DH_COMPRESSED_LZO; + break; + + case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY: + s->flag_compress = DUMP_DH_COMPRESSED_SNAPPY; + break; + + default: + s->flag_compress = 0; + } + + return; + } if (s->has_filter) { memory_mapping_filter(&s->list, s->begin, s->length); @@ -1161,35 +1589,55 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, } } - return 0; + return; cleanup: - guest_phys_blocks_free(&s->guest_phys_blocks); - - if (s->resume) { - vm_start(); - } - - return -1; + dump_cleanup(s); } void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, - int64_t begin, bool has_length, int64_t length, - Error **errp) + int64_t begin, bool has_length, + int64_t length, bool has_format, + DumpGuestMemoryFormat format, Error **errp) { const char *p; int fd = -1; DumpState *s; - int ret; + Error *local_err = NULL; + /* + * kdump-compressed format need the whole memory dumped, so paging or + * filter is not supported here. + */ + if ((has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) && + (paging || has_begin || has_length)) { + error_setg(errp, "kdump-compressed format doesn't support paging or " + "filter"); + return; + } if (has_begin && !has_length) { - error_set(errp, QERR_MISSING_PARAMETER, "length"); + error_setg(errp, QERR_MISSING_PARAMETER, "length"); return; } if (!has_begin && has_length) { - error_set(errp, QERR_MISSING_PARAMETER, "begin"); + error_setg(errp, QERR_MISSING_PARAMETER, "begin"); + return; + } + + /* check whether lzo/snappy is supported */ +#ifndef CONFIG_LZO + if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO) { + error_setg(errp, "kdump-lzo is not available now"); return; } +#endif + +#ifndef CONFIG_SNAPPY + if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY) { + error_setg(errp, "kdump-snappy is not available now"); + return; + } +#endif #if !defined(WIN32) if (strstart(file, "fd:", &p)) { @@ -1209,21 +1657,58 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, } if (fd == -1) { - error_set(errp, QERR_INVALID_PARAMETER, "protocol"); + error_setg(errp, QERR_INVALID_PARAMETER, "protocol"); return; } s = g_malloc0(sizeof(DumpState)); - ret = dump_init(s, fd, paging, has_begin, begin, length, errp); - if (ret < 0) { + dump_init(s, fd, has_format, format, paging, has_begin, + begin, length, &local_err); + if (local_err) { g_free(s); + error_propagate(errp, local_err); return; } - if (create_vmcore(s) < 0 && !error_is_set(s->errp)) { - error_set(errp, QERR_IO_ERROR); + if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) { + create_kdump_vmcore(s, errp); + } else { + create_vmcore(s, errp); } g_free(s); } + +DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp) +{ + DumpGuestMemoryFormatList *item; + DumpGuestMemoryCapability *cap = + g_malloc0(sizeof(DumpGuestMemoryCapability)); + + /* elf is always available */ + item = g_malloc0(sizeof(DumpGuestMemoryFormatList)); + cap->formats = item; + item->value = DUMP_GUEST_MEMORY_FORMAT_ELF; + + /* kdump-zlib is always available */ + item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); + item = item->next; + item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB; + + /* add new item if kdump-lzo is available */ +#ifdef CONFIG_LZO + item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); + item = item->next; + item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO; +#endif + + /* add new item if kdump-snappy is available */ +#ifdef CONFIG_SNAPPY + item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList)); + item = item->next; + item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY; +#endif + + return cap; +}