*
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
#include "elf.h"
#include "cpu.h"
#include "exec/cpu-all.h"
#include "sysemu/sysemu.h"
#include "sysemu/memory_mapping.h"
#include "sysemu/cpus.h"
-#include "qapi/error.h"
+#include "qapi/qmp/qerror.h"
#include "qmp-commands.h"
+#include "qapi-event.h"
#include <zlib.h>
#ifdef CONFIG_LZO
#define ELF_MACHINE_UNAME "Unknown"
#endif
-static uint16_t cpu_convert_to_target16(uint16_t val, int endian)
+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);
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);
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);
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;
-
- 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;
-}
-
-static void dump_error(DumpState *s, const char *reason)
-{
- dump_cleanup(s);
+ return 0;
}
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;
+ error_setg(errp, "dump: failed to write elf header");
}
-
- 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;
+ error_setg(errp, "dump: failed to write elf header");
}
-
- 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;
+ error_setg(errp, "dump: failed to write program header table");
}
-
- 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;
+ error_setg(errp, "dump: failed to write program header table");
}
-
- 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;
+ error_setg(errp, "dump: failed to write program header table");
}
-
- return 0;
}
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;
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;
+ error_setg(errp, "dump: failed to write elf notes");
+ 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;
+ error_setg(errp, "dump: failed to write CPU status");
+ 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;
+ error_setg(errp, "dump: failed to write program header table");
}
-
- 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;
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;
+ error_setg(errp, "dump: failed to write elf notes");
+ 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;
+ error_setg(errp, "dump: failed to write CPU status");
+ 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;
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;
+ error_setg(errp, "dump: failed to write section header table");
}
-
- 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;
+ error_setg(errp, "dump: failed to save memory");
+ } else {
+ s->written_size += length;
}
-
- 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;
+ for (i = 0; i < size / s->dump_info.page_size; i++) {
+ write_data(s, block->host_addr + start + i * s->dump_info.page_size,
+ s->dump_info.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;
+ if ((size % s->dump_info.page_size) != 0) {
+ write_data(s, block->host_addr + start + i * s->dump_info.page_size,
+ size % s->dump_info.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 */
}
}
-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;
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:
/* 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)
-{
- dump_cleanup(s);
- return 0;
}
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;
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));
}
-static int create_vmcore(DumpState *s)
+static void create_vmcore(DumpState *s, Error **errp)
{
- int ret;
-
- ret = dump_begin(s);
- if (ret < 0) {
- return -1;
- }
+ Error *local_err = NULL;
- 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;
}
}
/* 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 = s->dump_info.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);
+ 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_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;
+ error_setg(errp, "dump: failed to write disk dump header");
goto out;
}
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, s->dump_info.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;
+ error_setg(errp, "dump: failed to write kdump sub header");
goto out;
}
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;
+ error_setg(errp, "dump: failed to write notes");
goto 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 = s->dump_info.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);
+ 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_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;
+ error_setg(errp, "dump: failed to write disk dump header");
goto out;
}
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, s->dump_info.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;
+ error_setg(errp, "dump: failed to write kdump sub header");
goto out;
}
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;
+ error_setg(errp, "dump: failed to write notes");
goto out;
}
g_free(dh);
g_free(kh);
g_free(s->note_buf);
-
- return ret;
}
-static int write_dump_header(DumpState *s)
+static void write_dump_header(DumpState *s, Error **errp)
{
- if (s->dump_info.d_machine == EM_386) {
- return create_header32(s);
+ Error *local_err = NULL;
+
+ if (s->dump_info.d_class == ELFCLASS32) {
+ create_header32(s, &local_err);
} else {
- return create_header64(s);
+ create_header64(s, &local_err);
}
+ error_propagate(errp, local_err);
+}
+
+static size_t dump_bitmap_get_bufsize(DumpState *s)
+{
+ return s->dump_info.page_size;
}
/*
off_t old_offset, new_offset;
off_t offset_bitmap1, offset_bitmap2;
uint32_t byte, bit;
+ size_t bitmap_bufsize = dump_bitmap_get_bufsize(s);
+ size_t bits_per_buf = bitmap_bufsize * CHAR_BIT;
/* should not set the previous place */
assert(last_pfn <= pfn);
* 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);
+ old_offset = bitmap_bufsize * (last_pfn / bits_per_buf);
+ new_offset = bitmap_bufsize * (pfn / bits_per_buf);
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) {
+ bitmap_bufsize) < 0) {
return -1;
}
offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap +
old_offset;
if (write_buffer(s->fd, offset_bitmap2, buf,
- BUFSIZE_BITMAP) < 0) {
+ bitmap_bufsize) < 0) {
return -1;
}
- memset(buf, 0, BUFSIZE_BITMAP);
- old_offset += BUFSIZE_BITMAP;
+ memset(buf, 0, bitmap_bufsize);
+ old_offset += bitmap_bufsize;
}
/* 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;
+ byte = (pfn % bits_per_buf) / CHAR_BIT;
+ bit = (pfn % bits_per_buf) % CHAR_BIT;
if (value) {
buf[byte] |= 1u << bit;
} else {
return 0;
}
+static uint64_t dump_paddr_to_pfn(DumpState *s, uint64_t addr)
+{
+ int target_page_shift = ctz32(s->dump_info.page_size);
+
+ return (addr >> target_page_shift) - ARCH_PFN_OFFSET;
+}
+
+static uint64_t dump_pfn_to_paddr(DumpState *s, uint64_t pfn)
+{
+ int target_page_shift = ctz32(s->dump_info.page_size);
+
+ return (pfn + ARCH_PFN_OFFSET) << target_page_shift;
+}
+
/*
* 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
uint8_t **bufptr, DumpState *s)
{
GuestPhysBlock *block = *blockptr;
- hwaddr addr;
+ hwaddr addr, target_page_mask = ~((hwaddr)s->dump_info.page_size - 1);
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 % s->page_size == 0);
- assert(block->target_end % s->page_size == 0);
- *pfnptr = paddr_to_pfn(block->target_start, s->page_shift);
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, block->target_start);
if (bufptr) {
*bufptr = block->host_addr;
}
}
*pfnptr = *pfnptr + 1;
- addr = pfn_to_paddr(*pfnptr, s->page_shift);
+ addr = dump_pfn_to_paddr(s, *pfnptr);
if ((addr >= block->target_start) &&
- (addr + s->page_size <= block->target_end)) {
+ (addr + s->dump_info.page_size <= block->target_end)) {
buf = block->host_addr + (addr - block->target_start);
} else {
/* the next page is in the next block */
if (!block) {
return false;
}
- assert(block->target_start % s->page_size == 0);
- assert(block->target_end % s->page_size == 0);
- *pfnptr = paddr_to_pfn(block->target_start, s->page_shift);
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, block->target_start);
buf = block->host_addr;
}
return true;
}
-static int write_dump_bitmap(DumpState *s)
+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;
+ size_t bitmap_bufsize = dump_bitmap_get_bufsize(s);
+ size_t bits_per_buf = bitmap_bufsize * CHAR_BIT;
/* dump_bitmap_buf is used to store dump_bitmap temporarily */
- dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP);
+ dump_bitmap_buf = g_malloc0(bitmap_bufsize);
num_dumpable = 0;
last_pfn = 0;
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.\n");
- ret = -1;
+ error_setg(errp, "dump: failed to set dump_bitmap");
goto out;
}
/*
* 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.
+ * set the remaining bits from last_pfn to the end of the bitmap buffer to
+ * 0. With those set, the un-sync bit will be synchronized into the vmcore.
*/
if (num_dumpable > 0) {
- ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false,
+ ret = set_dump_bitmap(last_pfn, last_pfn + bits_per_buf, false,
dump_bitmap_buf, s);
if (ret < 0) {
- dump_error(s, "dump: failed to sync dump_bitmap.\n");
- ret = -1;
+ error_setg(errp, "dump: failed to sync dump_bitmap");
goto out;
}
}
out:
g_free(dump_bitmap_buf);
-
- return ret;
}
static void prepare_data_cache(DataCache *data_cache, DumpState *s,
{
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->buf_size = 4 * dump_bitmap_get_bufsize(s);
+ data_cache->buf = g_malloc0(data_cache->buf_size);
data_cache->offset = offset;
}
static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress)
{
- size_t len_buf_out_zlib, len_buf_out_lzo, len_buf_out_snappy;
- size_t len_buf_out;
-
- /* init buf_out */
- len_buf_out_zlib = len_buf_out_lzo = len_buf_out_snappy = 0;
-
- /* buf size for zlib */
- len_buf_out_zlib = compressBound(page_size);
-
- /* buf size for lzo */
-#ifdef CONFIG_LZO
- if (flag_compress & DUMP_DH_COMPRESSED_LZO) {
- if (lzo_init() != LZO_E_OK) {
- /* return 0 to indicate lzo is unavailable */
- return 0;
- }
- }
-
- /*
- * 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
- */
- len_buf_out_lzo = page_size + page_size / 16 + 64 + 3;
-#endif
+ 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
- /* buf size for snappy */
- len_buf_out_snappy = snappy_max_compressed_length(page_size);
+ case DUMP_DH_COMPRESSED_SNAPPY:
+ return snappy_max_compressed_length(page_size);
#endif
-
- /* get the biggest that can store all kinds of compressed page */
- len_buf_out = MAX(len_buf_out_zlib,
- MAX(len_buf_out_lzo, len_buf_out_snappy));
-
- return len_buf_out;
+ }
+ return 0;
}
/*
return buffer_is_zero(buf, page_size);
}
-static int write_dump_pages(DumpState *s)
+static void write_dump_pages(DumpState *s, Error **errp)
{
int ret = 0;
DataCache page_desc, page_data;
off_t offset_desc, offset_data;
PageDescriptor pd, pd_zero;
uint8_t *buf;
- int endian = s->dump_info.d_endian;
GuestPhysBlock *block_iter = NULL;
uint64_t pfn_iter;
prepare_data_cache(&page_data, s, offset_data);
/* prepare buffer to store compressed data */
- len_buf_out = get_len_buf_out(s->page_size, s->flag_compress);
- if (len_buf_out == 0) {
- dump_error(s, "dump: failed to get length of output buffer.\n");
- goto out;
- }
+ len_buf_out = get_len_buf_out(s->dump_info.page_size, s->flag_compress);
+ assert(len_buf_out != 0);
#ifdef CONFIG_LZO
wrkmem = g_malloc(LZO1X_1_MEM_COMPRESS);
* init zero page's page_desc and page_data, because every zero page
* uses the same page_data
*/
- pd_zero.size = cpu_convert_to_target32(s->page_size, endian);
- pd_zero.flags = cpu_convert_to_target32(0, endian);
- pd_zero.offset = cpu_convert_to_target64(offset_data, endian);
- pd_zero.page_flags = cpu_convert_to_target64(0, endian);
- buf = g_malloc0(s->page_size);
- ret = write_cache(&page_data, buf, s->page_size, false);
+ pd_zero.size = cpu_to_dump32(s, s->dump_info.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(s->dump_info.page_size);
+ ret = write_cache(&page_data, buf, s->dump_info.page_size, false);
g_free(buf);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data(zero page).\n");
+ error_setg(errp, "dump: failed to write page data (zero page)");
goto out;
}
- offset_data += s->page_size;
+ offset_data += s->dump_info.page_size;
/*
* dump memory to vmcore page by page. zero page will all be resided in the
*/
while (get_next_page(&block_iter, &pfn_iter, &buf, s)) {
/* check zero page */
- if (is_zero_page(buf, s->page_size)) {
+ if (is_zero_page(buf, s->dump_info.page_size)) {
ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor),
false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page desc.\n");
+ error_setg(errp, "dump: failed to write page desc");
goto out;
}
} else {
*/
size_out = len_buf_out;
if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) &&
- (compress2(buf_out, (uLongf *)&size_out, buf, s->page_size,
- Z_BEST_SPEED) == Z_OK) && (size_out < s->page_size)) {
- pd.flags = cpu_convert_to_target32(DUMP_DH_COMPRESSED_ZLIB,
- endian);
- pd.size = cpu_convert_to_target32(size_out, endian);
+ (compress2(buf_out, (uLongf *)&size_out, buf,
+ s->dump_info.page_size, Z_BEST_SPEED) == Z_OK) &&
+ (size_out < s->dump_info.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.\n");
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#ifdef CONFIG_LZO
} else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) &&
- (lzo1x_1_compress(buf, s->page_size, buf_out,
+ (lzo1x_1_compress(buf, s->dump_info.page_size, buf_out,
(lzo_uint *)&size_out, wrkmem) == LZO_E_OK) &&
- (size_out < s->page_size)) {
- pd.flags = cpu_convert_to_target32(DUMP_DH_COMPRESSED_LZO,
- endian);
- pd.size = cpu_convert_to_target32(size_out, endian);
+ (size_out < s->dump_info.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.\n");
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#endif
#ifdef CONFIG_SNAPPY
} else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) &&
- (snappy_compress((char *)buf, s->page_size,
+ (snappy_compress((char *)buf, s->dump_info.page_size,
(char *)buf_out, &size_out) == SNAPPY_OK) &&
- (size_out < s->page_size)) {
- pd.flags = cpu_convert_to_target32(
- DUMP_DH_COMPRESSED_SNAPPY, endian);
- pd.size = cpu_convert_to_target32(size_out, endian);
+ (size_out < s->dump_info.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.\n");
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#endif
} else {
/*
* fall back to save in plaintext, size_out should be
- * assigned to s->page_size
+ * assigned the target's page size
*/
- pd.flags = cpu_convert_to_target32(0, endian);
- size_out = s->page_size;
- pd.size = cpu_convert_to_target32(size_out, endian);
+ pd.flags = cpu_to_dump32(s, 0);
+ size_out = s->dump_info.page_size;
+ pd.size = cpu_to_dump32(s, size_out);
- ret = write_cache(&page_data, buf, s->page_size, false);
+ ret = write_cache(&page_data, buf,
+ s->dump_info.page_size, false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data.\n");
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
}
/* get and write page desc here */
- pd.page_flags = cpu_convert_to_target64(0, endian);
- pd.offset = cpu_convert_to_target64(offset_data, endian);
+ 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.\n");
+ error_setg(errp, "dump: failed to write page desc");
goto out;
}
}
+ s->written_size += s->dump_info.page_size;
}
ret = write_cache(&page_desc, NULL, 0, true);
if (ret < 0) {
- dump_error(s, "dump: failed to sync cache for page_desc.\n");
+ error_setg(errp, "dump: failed to sync cache for page_desc");
goto out;
}
ret = write_cache(&page_data, NULL, 0, true);
if (ret < 0) {
- dump_error(s, "dump: failed to sync cache for page_data.\n");
+ error_setg(errp, "dump: failed to sync cache for page_data");
goto out;
}
#endif
g_free(buf_out);
-
- return ret;
}
-static int create_kdump_vmcore(DumpState *s)
+static void create_kdump_vmcore(DumpState *s, Error **errp)
{
int ret;
+ Error *local_err = NULL;
/*
* the kdump-compressed format is:
ret = write_start_flat_header(s->fd);
if (ret < 0) {
- dump_error(s, "dump: failed to write start flat header.\n");
- return -1;
+ error_setg(errp, "dump: failed to write start flat header");
+ return;
}
- ret = write_dump_header(s);
- if (ret < 0) {
- return -1;
+ write_dump_header(s, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
}
- ret = write_dump_bitmap(s);
- if (ret < 0) {
- return -1;
+ write_dump_bitmap(s, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
}
- ret = write_dump_pages(s);
- if (ret < 0) {
- return -1;
+ 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.\n");
- return -1;
+ error_setg(errp, "dump: failed to write end flat header");
+ return;
}
-
- dump_completed(s);
-
- return 0;
}
static ram_addr_t get_start_block(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 = dump_paddr_to_pfn(s, last_block->target_end);
+}
+
+static DumpState dump_state_global = { .status = DUMP_STATUS_NONE };
+
+static void dump_state_prepare(DumpState *s)
+{
+ /* zero the struct, setting status to active */
+ *s = (DumpState) { .status = DUMP_STATUS_ACTIVE };
+}
+
+bool dump_in_progress(void)
+{
+ DumpState *state = &dump_state_global;
+ return (atomic_read(&state->status) == DUMP_STATUS_ACTIVE);
}
-static int dump_init(DumpState *s, int fd, bool has_format,
- DumpGuestMemoryFormat format, bool paging, bool has_filter,
- int64_t begin, int64_t length, Error **errp)
+/* calculate total size of memory to be dumped (taking filter into
+ * acoount.) */
+static int64_t dump_calculate_size(DumpState *s)
+{
+ GuestPhysBlock *block;
+ int64_t size = 0, total = 0, left = 0, right = 0;
+
+ QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ if (s->has_filter) {
+ /* calculate the overlapped region. */
+ left = MAX(s->begin, block->target_start);
+ right = MIN(s->begin + s->length, block->target_end);
+ size = right - left;
+ size = size > 0 ? size : 0;
+ } else {
+ /* count the whole region in */
+ size = (block->target_end - block->target_start);
+ }
+ total += size;
+ }
+
+ return total;
+}
+
+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;
+ s->has_format = has_format;
+ s->format = format;
+ s->written_size = 0;
+
/* kdump-compressed is conflict with paging and filter */
if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
assert(!paging && !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->total_size = dump_calculate_size(s);
+#ifdef DEBUG_DUMP_GUEST_MEMORY
+ fprintf(stderr, "DUMP: total memory to dump: %lu\n", s->total_size);
+#endif
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;
}
*/
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;
}
+ if (!s->dump_info.page_size) {
+ s->dump_info.page_size = TARGET_PAGE_SIZE;
+ }
+
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) {
}
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),
+ s->dump_info.page_size);
+ s->len_dump_bitmap = tmp * s->dump_info.page_size;
/* init for kdump-compressed format */
if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
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;
s->flag_compress = 0;
}
- return 0;
+ return;
}
if (s->has_filter) {
}
}
- return 0;
+ return;
cleanup:
- guest_phys_blocks_free(&s->guest_phys_blocks);
+ dump_cleanup(s);
+}
- if (s->resume) {
- vm_start();
+/* this operation might be time consuming. */
+static void dump_process(DumpState *s, Error **errp)
+{
+ Error *local_err = NULL;
+ DumpQueryResult *result = NULL;
+
+ if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
+ create_kdump_vmcore(s, &local_err);
+ } else {
+ create_vmcore(s, &local_err);
}
- return -1;
+ /* make sure status is written after written_size updates */
+ smp_wmb();
+ atomic_set(&s->status,
+ (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED));
+
+ /* send DUMP_COMPLETED message (unconditionally) */
+ result = qmp_query_dump(NULL);
+ /* should never fail */
+ assert(result);
+ qapi_event_send_dump_completed(result, !!local_err, (local_err ? \
+ error_get_pretty(local_err) : NULL),
+ &error_abort);
+ qapi_free_DumpQueryResult(result);
+
+ error_propagate(errp, local_err);
+ dump_cleanup(s);
+}
+
+static void *dump_thread(void *data)
+{
+ Error *err = NULL;
+ DumpState *s = (DumpState *)data;
+ dump_process(s, &err);
+ error_free(err);
+ return NULL;
+}
+
+DumpQueryResult *qmp_query_dump(Error **errp)
+{
+ DumpQueryResult *result = g_new(DumpQueryResult, 1);
+ DumpState *state = &dump_state_global;
+ result->status = atomic_read(&state->status);
+ /* make sure we are reading status and written_size in order */
+ smp_rmb();
+ result->completed = state->written_size;
+ result->total = state->total_size;
+ return result;
}
-void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
- int64_t begin, bool has_length,
+void qmp_dump_guest_memory(bool paging, const char *file,
+ bool has_detach, bool detach,
+ bool has_begin, 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;
+ bool detach_p = false;
+
+ if (runstate_check(RUN_STATE_INMIGRATE)) {
+ error_setg(errp, "Dump not allowed during incoming migration.");
+ return;
+ }
+
+ /* if there is a dump in background, we should wait until the dump
+ * finished */
+ if (dump_in_progress()) {
+ error_setg(errp, "There is a dump in process, please wait.");
+ return;
+ }
/*
* kdump-compressed format need the whole memory dumped, so paging or
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;
}
+ if (has_detach) {
+ detach_p = detach;
+ }
/* check whether lzo/snappy is supported */
#ifndef CONFIG_LZO
}
if (fd == -1) {
- error_set(errp, QERR_INVALID_PARAMETER, "protocol");
+ error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
return;
}
- s = g_malloc0(sizeof(DumpState));
+ s = &dump_state_global;
+ dump_state_prepare(s);
- ret = dump_init(s, fd, has_format, format, paging, has_begin,
- begin, length, errp);
- if (ret < 0) {
- g_free(s);
+ dump_init(s, fd, has_format, format, paging, has_begin,
+ begin, length, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ atomic_set(&s->status, DUMP_STATUS_FAILED);
return;
}
- if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
- if (create_kdump_vmcore(s) < 0) {
- error_set(errp, QERR_IO_ERROR);
- }
+ if (detach_p) {
+ /* detached dump */
+ qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
+ s, QEMU_THREAD_DETACHED);
} else {
- if (create_vmcore(s) < 0) {
- error_set(errp, QERR_IO_ERROR);
- }
+ /* sync dump */
+ dump_process(s, errp);
}
-
- g_free(s);
}
DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
projects / qemu.git / blobdiff