4 * Copyright Fujitsu, Corp. 2011, 2012
7 * Wen Congyang <wency@cn.fujitsu.com>
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
14 #include "qemu-common.h"
17 #include "exec/cpu-all.h"
18 #include "exec/hwaddr.h"
19 #include "monitor/monitor.h"
20 #include "sysemu/kvm.h"
21 #include "sysemu/dump.h"
22 #include "sysemu/sysemu.h"
23 #include "sysemu/memory_mapping.h"
24 #include "sysemu/cpus.h"
25 #include "qapi/error.h"
26 #include "qmp-commands.h"
30 #include <lzo/lzo1x.h>
35 #ifndef ELF_MACHINE_UNAME
36 #define ELF_MACHINE_UNAME "Unknown"
39 static uint16_t cpu_convert_to_target16(uint16_t val
, int endian
)
41 if (endian
== ELFDATA2LSB
) {
42 val
= cpu_to_le16(val
);
44 val
= cpu_to_be16(val
);
50 static uint32_t cpu_convert_to_target32(uint32_t val
, int endian
)
52 if (endian
== ELFDATA2LSB
) {
53 val
= cpu_to_le32(val
);
55 val
= cpu_to_be32(val
);
61 static uint64_t cpu_convert_to_target64(uint64_t val
, int endian
)
63 if (endian
== ELFDATA2LSB
) {
64 val
= cpu_to_le64(val
);
66 val
= cpu_to_be64(val
);
72 typedef struct DumpState
{
73 GuestPhysBlockList guest_phys_blocks
;
74 ArchDumpInfo dump_info
;
75 MemoryMappingList list
;
84 GuestPhysBlock
*next_block
;
90 uint8_t *note_buf
; /* buffer for notes */
91 size_t note_buf_offset
; /* the writing place in note_buf */
92 uint32_t nr_cpus
; /* number of guest's cpu */
93 uint64_t max_mapnr
; /* the biggest guest's phys-mem's number */
94 size_t len_dump_bitmap
; /* the size of the place used to store
95 dump_bitmap in vmcore */
96 off_t offset_dump_bitmap
; /* offset of dump_bitmap part in vmcore */
97 off_t offset_page
; /* offset of page part in vmcore */
98 size_t num_dumpable
; /* number of page that can be dumped */
99 uint32_t flag_compress
; /* indicate the compression format */
102 static int dump_cleanup(DumpState
*s
)
106 guest_phys_blocks_free(&s
->guest_phys_blocks
);
107 memory_mapping_list_free(&s
->list
);
118 static void dump_error(DumpState
*s
, const char *reason
)
123 static int fd_write_vmcore(const void *buf
, size_t size
, void *opaque
)
125 DumpState
*s
= opaque
;
128 written_size
= qemu_write_full(s
->fd
, buf
, size
);
129 if (written_size
!= size
) {
136 static int write_elf64_header(DumpState
*s
)
138 Elf64_Ehdr elf_header
;
140 int endian
= s
->dump_info
.d_endian
;
142 memset(&elf_header
, 0, sizeof(Elf64_Ehdr
));
143 memcpy(&elf_header
, ELFMAG
, SELFMAG
);
144 elf_header
.e_ident
[EI_CLASS
] = ELFCLASS64
;
145 elf_header
.e_ident
[EI_DATA
] = s
->dump_info
.d_endian
;
146 elf_header
.e_ident
[EI_VERSION
] = EV_CURRENT
;
147 elf_header
.e_type
= cpu_convert_to_target16(ET_CORE
, endian
);
148 elf_header
.e_machine
= cpu_convert_to_target16(s
->dump_info
.d_machine
,
150 elf_header
.e_version
= cpu_convert_to_target32(EV_CURRENT
, endian
);
151 elf_header
.e_ehsize
= cpu_convert_to_target16(sizeof(elf_header
), endian
);
152 elf_header
.e_phoff
= cpu_convert_to_target64(sizeof(Elf64_Ehdr
), endian
);
153 elf_header
.e_phentsize
= cpu_convert_to_target16(sizeof(Elf64_Phdr
),
155 elf_header
.e_phnum
= cpu_convert_to_target16(s
->phdr_num
, endian
);
156 if (s
->have_section
) {
157 uint64_t shoff
= sizeof(Elf64_Ehdr
) + sizeof(Elf64_Phdr
) * s
->sh_info
;
159 elf_header
.e_shoff
= cpu_convert_to_target64(shoff
, endian
);
160 elf_header
.e_shentsize
= cpu_convert_to_target16(sizeof(Elf64_Shdr
),
162 elf_header
.e_shnum
= cpu_convert_to_target16(1, endian
);
165 ret
= fd_write_vmcore(&elf_header
, sizeof(elf_header
), s
);
167 dump_error(s
, "dump: failed to write elf header.\n");
174 static int write_elf32_header(DumpState
*s
)
176 Elf32_Ehdr elf_header
;
178 int endian
= s
->dump_info
.d_endian
;
180 memset(&elf_header
, 0, sizeof(Elf32_Ehdr
));
181 memcpy(&elf_header
, ELFMAG
, SELFMAG
);
182 elf_header
.e_ident
[EI_CLASS
] = ELFCLASS32
;
183 elf_header
.e_ident
[EI_DATA
] = endian
;
184 elf_header
.e_ident
[EI_VERSION
] = EV_CURRENT
;
185 elf_header
.e_type
= cpu_convert_to_target16(ET_CORE
, endian
);
186 elf_header
.e_machine
= cpu_convert_to_target16(s
->dump_info
.d_machine
,
188 elf_header
.e_version
= cpu_convert_to_target32(EV_CURRENT
, endian
);
189 elf_header
.e_ehsize
= cpu_convert_to_target16(sizeof(elf_header
), endian
);
190 elf_header
.e_phoff
= cpu_convert_to_target32(sizeof(Elf32_Ehdr
), endian
);
191 elf_header
.e_phentsize
= cpu_convert_to_target16(sizeof(Elf32_Phdr
),
193 elf_header
.e_phnum
= cpu_convert_to_target16(s
->phdr_num
, endian
);
194 if (s
->have_section
) {
195 uint32_t shoff
= sizeof(Elf32_Ehdr
) + sizeof(Elf32_Phdr
) * s
->sh_info
;
197 elf_header
.e_shoff
= cpu_convert_to_target32(shoff
, endian
);
198 elf_header
.e_shentsize
= cpu_convert_to_target16(sizeof(Elf32_Shdr
),
200 elf_header
.e_shnum
= cpu_convert_to_target16(1, endian
);
203 ret
= fd_write_vmcore(&elf_header
, sizeof(elf_header
), s
);
205 dump_error(s
, "dump: failed to write elf header.\n");
212 static int write_elf64_load(DumpState
*s
, MemoryMapping
*memory_mapping
,
213 int phdr_index
, hwaddr offset
,
218 int endian
= s
->dump_info
.d_endian
;
220 memset(&phdr
, 0, sizeof(Elf64_Phdr
));
221 phdr
.p_type
= cpu_convert_to_target32(PT_LOAD
, endian
);
222 phdr
.p_offset
= cpu_convert_to_target64(offset
, endian
);
223 phdr
.p_paddr
= cpu_convert_to_target64(memory_mapping
->phys_addr
, endian
);
224 phdr
.p_filesz
= cpu_convert_to_target64(filesz
, endian
);
225 phdr
.p_memsz
= cpu_convert_to_target64(memory_mapping
->length
, endian
);
226 phdr
.p_vaddr
= cpu_convert_to_target64(memory_mapping
->virt_addr
, endian
);
228 assert(memory_mapping
->length
>= filesz
);
230 ret
= fd_write_vmcore(&phdr
, sizeof(Elf64_Phdr
), s
);
232 dump_error(s
, "dump: failed to write program header table.\n");
239 static int write_elf32_load(DumpState
*s
, MemoryMapping
*memory_mapping
,
240 int phdr_index
, hwaddr offset
,
245 int endian
= s
->dump_info
.d_endian
;
247 memset(&phdr
, 0, sizeof(Elf32_Phdr
));
248 phdr
.p_type
= cpu_convert_to_target32(PT_LOAD
, endian
);
249 phdr
.p_offset
= cpu_convert_to_target32(offset
, endian
);
250 phdr
.p_paddr
= cpu_convert_to_target32(memory_mapping
->phys_addr
, endian
);
251 phdr
.p_filesz
= cpu_convert_to_target32(filesz
, endian
);
252 phdr
.p_memsz
= cpu_convert_to_target32(memory_mapping
->length
, endian
);
253 phdr
.p_vaddr
= cpu_convert_to_target32(memory_mapping
->virt_addr
, endian
);
255 assert(memory_mapping
->length
>= filesz
);
257 ret
= fd_write_vmcore(&phdr
, sizeof(Elf32_Phdr
), s
);
259 dump_error(s
, "dump: failed to write program header table.\n");
266 static int write_elf64_note(DumpState
*s
)
269 int endian
= s
->dump_info
.d_endian
;
270 hwaddr begin
= s
->memory_offset
- s
->note_size
;
273 memset(&phdr
, 0, sizeof(Elf64_Phdr
));
274 phdr
.p_type
= cpu_convert_to_target32(PT_NOTE
, endian
);
275 phdr
.p_offset
= cpu_convert_to_target64(begin
, endian
);
277 phdr
.p_filesz
= cpu_convert_to_target64(s
->note_size
, endian
);
278 phdr
.p_memsz
= cpu_convert_to_target64(s
->note_size
, endian
);
281 ret
= fd_write_vmcore(&phdr
, sizeof(Elf64_Phdr
), s
);
283 dump_error(s
, "dump: failed to write program header table.\n");
290 static inline int cpu_index(CPUState
*cpu
)
292 return cpu
->cpu_index
+ 1;
295 static int write_elf64_notes(WriteCoreDumpFunction f
, DumpState
*s
)
303 ret
= cpu_write_elf64_note(f
, cpu
, id
, s
);
305 dump_error(s
, "dump: failed to write elf notes.\n");
311 ret
= cpu_write_elf64_qemunote(f
, cpu
, s
);
313 dump_error(s
, "dump: failed to write CPU status.\n");
321 static int write_elf32_note(DumpState
*s
)
323 hwaddr begin
= s
->memory_offset
- s
->note_size
;
325 int endian
= s
->dump_info
.d_endian
;
328 memset(&phdr
, 0, sizeof(Elf32_Phdr
));
329 phdr
.p_type
= cpu_convert_to_target32(PT_NOTE
, endian
);
330 phdr
.p_offset
= cpu_convert_to_target32(begin
, endian
);
332 phdr
.p_filesz
= cpu_convert_to_target32(s
->note_size
, endian
);
333 phdr
.p_memsz
= cpu_convert_to_target32(s
->note_size
, endian
);
336 ret
= fd_write_vmcore(&phdr
, sizeof(Elf32_Phdr
), s
);
338 dump_error(s
, "dump: failed to write program header table.\n");
345 static int write_elf32_notes(WriteCoreDumpFunction f
, DumpState
*s
)
353 ret
= cpu_write_elf32_note(f
, cpu
, id
, s
);
355 dump_error(s
, "dump: failed to write elf notes.\n");
361 ret
= cpu_write_elf32_qemunote(f
, cpu
, s
);
363 dump_error(s
, "dump: failed to write CPU status.\n");
371 static int write_elf_section(DumpState
*s
, int type
)
375 int endian
= s
->dump_info
.d_endian
;
381 shdr_size
= sizeof(Elf32_Shdr
);
382 memset(&shdr32
, 0, shdr_size
);
383 shdr32
.sh_info
= cpu_convert_to_target32(s
->sh_info
, endian
);
386 shdr_size
= sizeof(Elf64_Shdr
);
387 memset(&shdr64
, 0, shdr_size
);
388 shdr64
.sh_info
= cpu_convert_to_target32(s
->sh_info
, endian
);
392 ret
= fd_write_vmcore(&shdr
, shdr_size
, s
);
394 dump_error(s
, "dump: failed to write section header table.\n");
401 static int write_data(DumpState
*s
, void *buf
, int length
)
405 ret
= fd_write_vmcore(buf
, length
, s
);
407 dump_error(s
, "dump: failed to save memory.\n");
414 /* write the memroy to vmcore. 1 page per I/O. */
415 static int write_memory(DumpState
*s
, GuestPhysBlock
*block
, ram_addr_t start
,
421 for (i
= 0; i
< size
/ TARGET_PAGE_SIZE
; i
++) {
422 ret
= write_data(s
, block
->host_addr
+ start
+ i
* TARGET_PAGE_SIZE
,
429 if ((size
% TARGET_PAGE_SIZE
) != 0) {
430 ret
= write_data(s
, block
->host_addr
+ start
+ i
* TARGET_PAGE_SIZE
,
431 size
% TARGET_PAGE_SIZE
);
440 /* get the memory's offset and size in the vmcore */
441 static void get_offset_range(hwaddr phys_addr
,
442 ram_addr_t mapping_length
,
447 GuestPhysBlock
*block
;
448 hwaddr offset
= s
->memory_offset
;
449 int64_t size_in_block
, start
;
451 /* When the memory is not stored into vmcore, offset will be -1 */
456 if (phys_addr
< s
->begin
|| phys_addr
>= s
->begin
+ s
->length
) {
461 QTAILQ_FOREACH(block
, &s
->guest_phys_blocks
.head
, next
) {
463 if (block
->target_start
>= s
->begin
+ s
->length
||
464 block
->target_end
<= s
->begin
) {
465 /* This block is out of the range */
469 if (s
->begin
<= block
->target_start
) {
470 start
= block
->target_start
;
475 size_in_block
= block
->target_end
- start
;
476 if (s
->begin
+ s
->length
< block
->target_end
) {
477 size_in_block
-= block
->target_end
- (s
->begin
+ s
->length
);
480 start
= block
->target_start
;
481 size_in_block
= block
->target_end
- block
->target_start
;
484 if (phys_addr
>= start
&& phys_addr
< start
+ size_in_block
) {
485 *p_offset
= phys_addr
- start
+ offset
;
487 /* The offset range mapped from the vmcore file must not spill over
488 * the GuestPhysBlock, clamp it. The rest of the mapping will be
489 * zero-filled in memory at load time; see
490 * <http://refspecs.linuxbase.org/elf/gabi4+/ch5.pheader.html>.
492 *p_filesz
= phys_addr
+ mapping_length
<= start
+ size_in_block
?
494 size_in_block
- (phys_addr
- start
);
498 offset
+= size_in_block
;
502 static int write_elf_loads(DumpState
*s
)
504 hwaddr offset
, filesz
;
505 MemoryMapping
*memory_mapping
;
506 uint32_t phdr_index
= 1;
510 if (s
->have_section
) {
511 max_index
= s
->sh_info
;
513 max_index
= s
->phdr_num
;
516 QTAILQ_FOREACH(memory_mapping
, &s
->list
.head
, next
) {
517 get_offset_range(memory_mapping
->phys_addr
,
518 memory_mapping
->length
,
519 s
, &offset
, &filesz
);
520 if (s
->dump_info
.d_class
== ELFCLASS64
) {
521 ret
= write_elf64_load(s
, memory_mapping
, phdr_index
++, offset
,
524 ret
= write_elf32_load(s
, memory_mapping
, phdr_index
++, offset
,
532 if (phdr_index
>= max_index
) {
540 /* write elf header, PT_NOTE and elf note to vmcore. */
541 static int dump_begin(DumpState
*s
)
546 * the vmcore's format is:
565 * we only know where the memory is saved after we write elf note into
569 /* write elf header to vmcore */
570 if (s
->dump_info
.d_class
== ELFCLASS64
) {
571 ret
= write_elf64_header(s
);
573 ret
= write_elf32_header(s
);
579 if (s
->dump_info
.d_class
== ELFCLASS64
) {
580 /* write PT_NOTE to vmcore */
581 if (write_elf64_note(s
) < 0) {
585 /* write all PT_LOAD to vmcore */
586 if (write_elf_loads(s
) < 0) {
590 /* write section to vmcore */
591 if (s
->have_section
) {
592 if (write_elf_section(s
, 1) < 0) {
597 /* write notes to vmcore */
598 if (write_elf64_notes(fd_write_vmcore
, s
) < 0) {
603 /* write PT_NOTE to vmcore */
604 if (write_elf32_note(s
) < 0) {
608 /* write all PT_LOAD to vmcore */
609 if (write_elf_loads(s
) < 0) {
613 /* write section to vmcore */
614 if (s
->have_section
) {
615 if (write_elf_section(s
, 0) < 0) {
620 /* write notes to vmcore */
621 if (write_elf32_notes(fd_write_vmcore
, s
) < 0) {
629 /* write PT_LOAD to vmcore */
630 static int dump_completed(DumpState
*s
)
636 static int get_next_block(DumpState
*s
, GuestPhysBlock
*block
)
639 block
= QTAILQ_NEXT(block
, next
);
646 s
->next_block
= block
;
648 if (block
->target_start
>= s
->begin
+ s
->length
||
649 block
->target_end
<= s
->begin
) {
650 /* This block is out of the range */
654 if (s
->begin
> block
->target_start
) {
655 s
->start
= s
->begin
- block
->target_start
;
663 /* write all memory to vmcore */
664 static int dump_iterate(DumpState
*s
)
666 GuestPhysBlock
*block
;
671 block
= s
->next_block
;
673 size
= block
->target_end
- block
->target_start
;
676 if (s
->begin
+ s
->length
< block
->target_end
) {
677 size
-= block
->target_end
- (s
->begin
+ s
->length
);
680 ret
= write_memory(s
, block
, s
->start
, size
);
685 ret
= get_next_block(s
, block
);
693 static int create_vmcore(DumpState
*s
)
702 ret
= dump_iterate(s
);
710 static int write_start_flat_header(int fd
)
712 MakedumpfileHeader
*mh
;
715 QEMU_BUILD_BUG_ON(sizeof *mh
> MAX_SIZE_MDF_HEADER
);
716 mh
= g_malloc0(MAX_SIZE_MDF_HEADER
);
718 memcpy(mh
->signature
, MAKEDUMPFILE_SIGNATURE
,
719 MIN(sizeof mh
->signature
, sizeof MAKEDUMPFILE_SIGNATURE
));
721 mh
->type
= cpu_to_be64(TYPE_FLAT_HEADER
);
722 mh
->version
= cpu_to_be64(VERSION_FLAT_HEADER
);
725 written_size
= qemu_write_full(fd
, mh
, MAX_SIZE_MDF_HEADER
);
726 if (written_size
!= MAX_SIZE_MDF_HEADER
) {
734 static int write_end_flat_header(int fd
)
736 MakedumpfileDataHeader mdh
;
738 mdh
.offset
= END_FLAG_FLAT_HEADER
;
739 mdh
.buf_size
= END_FLAG_FLAT_HEADER
;
742 written_size
= qemu_write_full(fd
, &mdh
, sizeof(mdh
));
743 if (written_size
!= sizeof(mdh
)) {
750 static int write_buffer(int fd
, off_t offset
, const void *buf
, size_t size
)
753 MakedumpfileDataHeader mdh
;
755 mdh
.offset
= cpu_to_be64(offset
);
756 mdh
.buf_size
= cpu_to_be64(size
);
758 written_size
= qemu_write_full(fd
, &mdh
, sizeof(mdh
));
759 if (written_size
!= sizeof(mdh
)) {
763 written_size
= qemu_write_full(fd
, buf
, size
);
764 if (written_size
!= size
) {
771 static int buf_write_note(const void *buf
, size_t size
, void *opaque
)
773 DumpState
*s
= opaque
;
775 /* note_buf is not enough */
776 if (s
->note_buf_offset
+ size
> s
->note_size
) {
780 memcpy(s
->note_buf
+ s
->note_buf_offset
, buf
, size
);
782 s
->note_buf_offset
+= size
;
787 /* write common header, sub header and elf note to vmcore */
788 static int create_header32(DumpState
*s
)
791 DiskDumpHeader32
*dh
= NULL
;
792 KdumpSubHeader32
*kh
= NULL
;
794 int endian
= s
->dump_info
.d_endian
;
796 uint32_t sub_hdr_size
;
797 uint32_t bitmap_blocks
;
799 uint64_t offset_note
;
801 /* write common header, the version of kdump-compressed format is 6th */
802 size
= sizeof(DiskDumpHeader32
);
803 dh
= g_malloc0(size
);
805 strncpy(dh
->signature
, KDUMP_SIGNATURE
, strlen(KDUMP_SIGNATURE
));
806 dh
->header_version
= cpu_convert_to_target32(6, endian
);
807 block_size
= TARGET_PAGE_SIZE
;
808 dh
->block_size
= cpu_convert_to_target32(block_size
, endian
);
809 sub_hdr_size
= sizeof(struct KdumpSubHeader32
) + s
->note_size
;
810 sub_hdr_size
= DIV_ROUND_UP(sub_hdr_size
, block_size
);
811 dh
->sub_hdr_size
= cpu_convert_to_target32(sub_hdr_size
, endian
);
812 /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */
813 dh
->max_mapnr
= cpu_convert_to_target32(MIN(s
->max_mapnr
, UINT_MAX
),
815 dh
->nr_cpus
= cpu_convert_to_target32(s
->nr_cpus
, endian
);
816 bitmap_blocks
= DIV_ROUND_UP(s
->len_dump_bitmap
, block_size
) * 2;
817 dh
->bitmap_blocks
= cpu_convert_to_target32(bitmap_blocks
, endian
);
818 strncpy(dh
->utsname
.machine
, ELF_MACHINE_UNAME
, sizeof(dh
->utsname
.machine
));
820 if (s
->flag_compress
& DUMP_DH_COMPRESSED_ZLIB
) {
821 status
|= DUMP_DH_COMPRESSED_ZLIB
;
824 if (s
->flag_compress
& DUMP_DH_COMPRESSED_LZO
) {
825 status
|= DUMP_DH_COMPRESSED_LZO
;
829 if (s
->flag_compress
& DUMP_DH_COMPRESSED_SNAPPY
) {
830 status
|= DUMP_DH_COMPRESSED_SNAPPY
;
833 dh
->status
= cpu_convert_to_target32(status
, endian
);
835 if (write_buffer(s
->fd
, 0, dh
, size
) < 0) {
836 dump_error(s
, "dump: failed to write disk dump header.\n");
841 /* write sub header */
842 size
= sizeof(KdumpSubHeader32
);
843 kh
= g_malloc0(size
);
845 /* 64bit max_mapnr_64 */
846 kh
->max_mapnr_64
= cpu_convert_to_target64(s
->max_mapnr
, endian
);
847 kh
->phys_base
= cpu_convert_to_target32(PHYS_BASE
, endian
);
848 kh
->dump_level
= cpu_convert_to_target32(DUMP_LEVEL
, endian
);
850 offset_note
= DISKDUMP_HEADER_BLOCKS
* block_size
+ size
;
851 kh
->offset_note
= cpu_convert_to_target64(offset_note
, endian
);
852 kh
->note_size
= cpu_convert_to_target32(s
->note_size
, endian
);
854 if (write_buffer(s
->fd
, DISKDUMP_HEADER_BLOCKS
*
855 block_size
, kh
, size
) < 0) {
856 dump_error(s
, "dump: failed to write kdump sub header.\n");
862 s
->note_buf
= g_malloc0(s
->note_size
);
863 s
->note_buf_offset
= 0;
865 /* use s->note_buf to store notes temporarily */
866 if (write_elf32_notes(buf_write_note
, s
) < 0) {
871 if (write_buffer(s
->fd
, offset_note
, s
->note_buf
,
873 dump_error(s
, "dump: failed to write notes");
878 /* get offset of dump_bitmap */
879 s
->offset_dump_bitmap
= (DISKDUMP_HEADER_BLOCKS
+ sub_hdr_size
) *
882 /* get offset of page */
883 s
->offset_page
= (DISKDUMP_HEADER_BLOCKS
+ sub_hdr_size
+ bitmap_blocks
) *
894 /* write common header, sub header and elf note to vmcore */
895 static int create_header64(DumpState
*s
)
898 DiskDumpHeader64
*dh
= NULL
;
899 KdumpSubHeader64
*kh
= NULL
;
901 int endian
= s
->dump_info
.d_endian
;
903 uint32_t sub_hdr_size
;
904 uint32_t bitmap_blocks
;
906 uint64_t offset_note
;
908 /* write common header, the version of kdump-compressed format is 6th */
909 size
= sizeof(DiskDumpHeader64
);
910 dh
= g_malloc0(size
);
912 strncpy(dh
->signature
, KDUMP_SIGNATURE
, strlen(KDUMP_SIGNATURE
));
913 dh
->header_version
= cpu_convert_to_target32(6, endian
);
914 block_size
= TARGET_PAGE_SIZE
;
915 dh
->block_size
= cpu_convert_to_target32(block_size
, endian
);
916 sub_hdr_size
= sizeof(struct KdumpSubHeader64
) + s
->note_size
;
917 sub_hdr_size
= DIV_ROUND_UP(sub_hdr_size
, block_size
);
918 dh
->sub_hdr_size
= cpu_convert_to_target32(sub_hdr_size
, endian
);
919 /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */
920 dh
->max_mapnr
= cpu_convert_to_target32(MIN(s
->max_mapnr
, UINT_MAX
),
922 dh
->nr_cpus
= cpu_convert_to_target32(s
->nr_cpus
, endian
);
923 bitmap_blocks
= DIV_ROUND_UP(s
->len_dump_bitmap
, block_size
) * 2;
924 dh
->bitmap_blocks
= cpu_convert_to_target32(bitmap_blocks
, endian
);
925 strncpy(dh
->utsname
.machine
, ELF_MACHINE_UNAME
, sizeof(dh
->utsname
.machine
));
927 if (s
->flag_compress
& DUMP_DH_COMPRESSED_ZLIB
) {
928 status
|= DUMP_DH_COMPRESSED_ZLIB
;
931 if (s
->flag_compress
& DUMP_DH_COMPRESSED_LZO
) {
932 status
|= DUMP_DH_COMPRESSED_LZO
;
936 if (s
->flag_compress
& DUMP_DH_COMPRESSED_SNAPPY
) {
937 status
|= DUMP_DH_COMPRESSED_SNAPPY
;
940 dh
->status
= cpu_convert_to_target32(status
, endian
);
942 if (write_buffer(s
->fd
, 0, dh
, size
) < 0) {
943 dump_error(s
, "dump: failed to write disk dump header.\n");
948 /* write sub header */
949 size
= sizeof(KdumpSubHeader64
);
950 kh
= g_malloc0(size
);
952 /* 64bit max_mapnr_64 */
953 kh
->max_mapnr_64
= cpu_convert_to_target64(s
->max_mapnr
, endian
);
954 kh
->phys_base
= cpu_convert_to_target64(PHYS_BASE
, endian
);
955 kh
->dump_level
= cpu_convert_to_target32(DUMP_LEVEL
, endian
);
957 offset_note
= DISKDUMP_HEADER_BLOCKS
* block_size
+ size
;
958 kh
->offset_note
= cpu_convert_to_target64(offset_note
, endian
);
959 kh
->note_size
= cpu_convert_to_target64(s
->note_size
, endian
);
961 if (write_buffer(s
->fd
, DISKDUMP_HEADER_BLOCKS
*
962 block_size
, kh
, size
) < 0) {
963 dump_error(s
, "dump: failed to write kdump sub header.\n");
969 s
->note_buf
= g_malloc0(s
->note_size
);
970 s
->note_buf_offset
= 0;
972 /* use s->note_buf to store notes temporarily */
973 if (write_elf64_notes(buf_write_note
, s
) < 0) {
978 if (write_buffer(s
->fd
, offset_note
, s
->note_buf
,
980 dump_error(s
, "dump: failed to write notes");
985 /* get offset of dump_bitmap */
986 s
->offset_dump_bitmap
= (DISKDUMP_HEADER_BLOCKS
+ sub_hdr_size
) *
989 /* get offset of page */
990 s
->offset_page
= (DISKDUMP_HEADER_BLOCKS
+ sub_hdr_size
+ bitmap_blocks
) *
1001 static int write_dump_header(DumpState
*s
)
1003 if (s
->dump_info
.d_machine
== EM_386
) {
1004 return create_header32(s
);
1006 return create_header64(s
);
1011 * set dump_bitmap sequencely. the bit before last_pfn is not allowed to be
1012 * rewritten, so if need to set the first bit, set last_pfn and pfn to 0.
1013 * set_dump_bitmap will always leave the recently set bit un-sync. And setting
1014 * (last bit + sizeof(buf) * 8) to 0 will do flushing the content in buf into
1015 * vmcore, ie. synchronizing un-sync bit into vmcore.
1017 static int set_dump_bitmap(uint64_t last_pfn
, uint64_t pfn
, bool value
,
1018 uint8_t *buf
, DumpState
*s
)
1020 off_t old_offset
, new_offset
;
1021 off_t offset_bitmap1
, offset_bitmap2
;
1024 /* should not set the previous place */
1025 assert(last_pfn
<= pfn
);
1028 * if the bit needed to be set is not cached in buf, flush the data in buf
1029 * to vmcore firstly.
1030 * making new_offset be bigger than old_offset can also sync remained data
1033 old_offset
= BUFSIZE_BITMAP
* (last_pfn
/ PFN_BUFBITMAP
);
1034 new_offset
= BUFSIZE_BITMAP
* (pfn
/ PFN_BUFBITMAP
);
1036 while (old_offset
< new_offset
) {
1037 /* calculate the offset and write dump_bitmap */
1038 offset_bitmap1
= s
->offset_dump_bitmap
+ old_offset
;
1039 if (write_buffer(s
->fd
, offset_bitmap1
, buf
,
1040 BUFSIZE_BITMAP
) < 0) {
1044 /* dump level 1 is chosen, so 1st and 2nd bitmap are same */
1045 offset_bitmap2
= s
->offset_dump_bitmap
+ s
->len_dump_bitmap
+
1047 if (write_buffer(s
->fd
, offset_bitmap2
, buf
,
1048 BUFSIZE_BITMAP
) < 0) {
1052 memset(buf
, 0, BUFSIZE_BITMAP
);
1053 old_offset
+= BUFSIZE_BITMAP
;
1056 /* get the exact place of the bit in the buf, and set it */
1057 byte
= (pfn
% PFN_BUFBITMAP
) / CHAR_BIT
;
1058 bit
= (pfn
% PFN_BUFBITMAP
) % CHAR_BIT
;
1060 buf
[byte
] |= 1u << bit
;
1062 buf
[byte
] &= ~(1u << bit
);
1069 * exam every page and return the page frame number and the address of the page.
1070 * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys
1071 * blocks, so block->target_start and block->target_end should be interal
1072 * multiples of the target page size.
1074 static bool get_next_page(GuestPhysBlock
**blockptr
, uint64_t *pfnptr
,
1075 uint8_t **bufptr
, DumpState
*s
)
1077 GuestPhysBlock
*block
= *blockptr
;
1081 /* block == NULL means the start of the iteration */
1083 block
= QTAILQ_FIRST(&s
->guest_phys_blocks
.head
);
1085 assert((block
->target_start
& ~TARGET_PAGE_MASK
) == 0);
1086 assert((block
->target_end
& ~TARGET_PAGE_MASK
) == 0);
1087 *pfnptr
= paddr_to_pfn(block
->target_start
);
1089 *bufptr
= block
->host_addr
;
1094 *pfnptr
= *pfnptr
+ 1;
1095 addr
= pfn_to_paddr(*pfnptr
);
1097 if ((addr
>= block
->target_start
) &&
1098 (addr
+ TARGET_PAGE_SIZE
<= block
->target_end
)) {
1099 buf
= block
->host_addr
+ (addr
- block
->target_start
);
1101 /* the next page is in the next block */
1102 block
= QTAILQ_NEXT(block
, next
);
1107 assert((block
->target_start
& ~TARGET_PAGE_MASK
) == 0);
1108 assert((block
->target_end
& ~TARGET_PAGE_MASK
) == 0);
1109 *pfnptr
= paddr_to_pfn(block
->target_start
);
1110 buf
= block
->host_addr
;
1120 static int write_dump_bitmap(DumpState
*s
)
1123 uint64_t last_pfn
, pfn
;
1124 void *dump_bitmap_buf
;
1125 size_t num_dumpable
;
1126 GuestPhysBlock
*block_iter
= NULL
;
1128 /* dump_bitmap_buf is used to store dump_bitmap temporarily */
1129 dump_bitmap_buf
= g_malloc0(BUFSIZE_BITMAP
);
1135 * exam memory page by page, and set the bit in dump_bitmap corresponded
1136 * to the existing page.
1138 while (get_next_page(&block_iter
, &pfn
, NULL
, s
)) {
1139 ret
= set_dump_bitmap(last_pfn
, pfn
, true, dump_bitmap_buf
, s
);
1141 dump_error(s
, "dump: failed to set dump_bitmap.\n");
1151 * set_dump_bitmap will always leave the recently set bit un-sync. Here we
1152 * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be
1153 * synchronized into vmcore.
1155 if (num_dumpable
> 0) {
1156 ret
= set_dump_bitmap(last_pfn
, last_pfn
+ PFN_BUFBITMAP
, false,
1157 dump_bitmap_buf
, s
);
1159 dump_error(s
, "dump: failed to sync dump_bitmap.\n");
1165 /* number of dumpable pages that will be dumped later */
1166 s
->num_dumpable
= num_dumpable
;
1169 g_free(dump_bitmap_buf
);
1174 static void prepare_data_cache(DataCache
*data_cache
, DumpState
*s
,
1177 data_cache
->fd
= s
->fd
;
1178 data_cache
->data_size
= 0;
1179 data_cache
->buf_size
= BUFSIZE_DATA_CACHE
;
1180 data_cache
->buf
= g_malloc0(BUFSIZE_DATA_CACHE
);
1181 data_cache
->offset
= offset
;
1184 static int write_cache(DataCache
*dc
, const void *buf
, size_t size
,
1188 * dc->buf_size should not be less than size, otherwise dc will never be
1191 assert(size
<= dc
->buf_size
);
1194 * if flag_sync is set, synchronize data in dc->buf into vmcore.
1195 * otherwise check if the space is enough for caching data in buf, if not,
1196 * write the data in dc->buf to dc->fd and reset dc->buf
1198 if ((!flag_sync
&& dc
->data_size
+ size
> dc
->buf_size
) ||
1199 (flag_sync
&& dc
->data_size
> 0)) {
1200 if (write_buffer(dc
->fd
, dc
->offset
, dc
->buf
, dc
->data_size
) < 0) {
1204 dc
->offset
+= dc
->data_size
;
1209 memcpy(dc
->buf
+ dc
->data_size
, buf
, size
);
1210 dc
->data_size
+= size
;
1216 static void free_data_cache(DataCache
*data_cache
)
1218 g_free(data_cache
->buf
);
1221 static size_t get_len_buf_out(size_t page_size
, uint32_t flag_compress
)
1223 size_t len_buf_out_zlib
, len_buf_out_lzo
, len_buf_out_snappy
;
1227 len_buf_out_zlib
= len_buf_out_lzo
= len_buf_out_snappy
= 0;
1229 /* buf size for zlib */
1230 len_buf_out_zlib
= compressBound(page_size
);
1232 /* buf size for lzo */
1234 if (flag_compress
& DUMP_DH_COMPRESSED_LZO
) {
1235 if (lzo_init() != LZO_E_OK
) {
1236 /* return 0 to indicate lzo is unavailable */
1242 * LZO will expand incompressible data by a little amount. please check the
1243 * following URL to see the expansion calculation:
1244 * http://www.oberhumer.com/opensource/lzo/lzofaq.php
1246 len_buf_out_lzo
= page_size
+ page_size
/ 16 + 64 + 3;
1249 #ifdef CONFIG_SNAPPY
1250 /* buf size for snappy */
1251 len_buf_out_snappy
= snappy_max_compressed_length(page_size
);
1254 /* get the biggest that can store all kinds of compressed page */
1255 len_buf_out
= MAX(len_buf_out_zlib
,
1256 MAX(len_buf_out_lzo
, len_buf_out_snappy
));
1262 * check if the page is all 0
1264 static inline bool is_zero_page(const uint8_t *buf
, size_t page_size
)
1266 return buffer_is_zero(buf
, page_size
);
1269 static int write_dump_pages(DumpState
*s
)
1272 DataCache page_desc
, page_data
;
1273 size_t len_buf_out
, size_out
;
1275 lzo_bytep wrkmem
= NULL
;
1277 uint8_t *buf_out
= NULL
;
1278 off_t offset_desc
, offset_data
;
1279 PageDescriptor pd
, pd_zero
;
1281 int endian
= s
->dump_info
.d_endian
;
1282 GuestPhysBlock
*block_iter
= NULL
;
1285 /* get offset of page_desc and page_data in dump file */
1286 offset_desc
= s
->offset_page
;
1287 offset_data
= offset_desc
+ sizeof(PageDescriptor
) * s
->num_dumpable
;
1289 prepare_data_cache(&page_desc
, s
, offset_desc
);
1290 prepare_data_cache(&page_data
, s
, offset_data
);
1292 /* prepare buffer to store compressed data */
1293 len_buf_out
= get_len_buf_out(TARGET_PAGE_SIZE
, s
->flag_compress
);
1294 if (len_buf_out
== 0) {
1295 dump_error(s
, "dump: failed to get length of output buffer.\n");
1300 wrkmem
= g_malloc(LZO1X_1_MEM_COMPRESS
);
1303 buf_out
= g_malloc(len_buf_out
);
1306 * init zero page's page_desc and page_data, because every zero page
1307 * uses the same page_data
1309 pd_zero
.size
= cpu_convert_to_target32(TARGET_PAGE_SIZE
, endian
);
1310 pd_zero
.flags
= cpu_convert_to_target32(0, endian
);
1311 pd_zero
.offset
= cpu_convert_to_target64(offset_data
, endian
);
1312 pd_zero
.page_flags
= cpu_convert_to_target64(0, endian
);
1313 buf
= g_malloc0(TARGET_PAGE_SIZE
);
1314 ret
= write_cache(&page_data
, buf
, TARGET_PAGE_SIZE
, false);
1317 dump_error(s
, "dump: failed to write page data(zero page).\n");
1321 offset_data
+= TARGET_PAGE_SIZE
;
1324 * dump memory to vmcore page by page. zero page will all be resided in the
1325 * first page of page section
1327 while (get_next_page(&block_iter
, &pfn_iter
, &buf
, s
)) {
1328 /* check zero page */
1329 if (is_zero_page(buf
, TARGET_PAGE_SIZE
)) {
1330 ret
= write_cache(&page_desc
, &pd_zero
, sizeof(PageDescriptor
),
1333 dump_error(s
, "dump: failed to write page desc.\n");
1338 * not zero page, then:
1339 * 1. compress the page
1340 * 2. write the compressed page into the cache of page_data
1341 * 3. get page desc of the compressed page and write it into the
1342 * cache of page_desc
1344 * only one compression format will be used here, for
1345 * s->flag_compress is set. But when compression fails to work,
1346 * we fall back to save in plaintext.
1348 size_out
= len_buf_out
;
1349 if ((s
->flag_compress
& DUMP_DH_COMPRESSED_ZLIB
) &&
1350 (compress2(buf_out
, (uLongf
*)&size_out
, buf
,
1351 TARGET_PAGE_SIZE
, Z_BEST_SPEED
) == Z_OK
) &&
1352 (size_out
< TARGET_PAGE_SIZE
)) {
1353 pd
.flags
= cpu_convert_to_target32(DUMP_DH_COMPRESSED_ZLIB
,
1355 pd
.size
= cpu_convert_to_target32(size_out
, endian
);
1357 ret
= write_cache(&page_data
, buf_out
, size_out
, false);
1359 dump_error(s
, "dump: failed to write page data.\n");
1363 } else if ((s
->flag_compress
& DUMP_DH_COMPRESSED_LZO
) &&
1364 (lzo1x_1_compress(buf
, TARGET_PAGE_SIZE
, buf_out
,
1365 (lzo_uint
*)&size_out
, wrkmem
) == LZO_E_OK
) &&
1366 (size_out
< TARGET_PAGE_SIZE
)) {
1367 pd
.flags
= cpu_convert_to_target32(DUMP_DH_COMPRESSED_LZO
,
1369 pd
.size
= cpu_convert_to_target32(size_out
, endian
);
1371 ret
= write_cache(&page_data
, buf_out
, size_out
, false);
1373 dump_error(s
, "dump: failed to write page data.\n");
1377 #ifdef CONFIG_SNAPPY
1378 } else if ((s
->flag_compress
& DUMP_DH_COMPRESSED_SNAPPY
) &&
1379 (snappy_compress((char *)buf
, TARGET_PAGE_SIZE
,
1380 (char *)buf_out
, &size_out
) == SNAPPY_OK
) &&
1381 (size_out
< TARGET_PAGE_SIZE
)) {
1382 pd
.flags
= cpu_convert_to_target32(
1383 DUMP_DH_COMPRESSED_SNAPPY
, endian
);
1384 pd
.size
= cpu_convert_to_target32(size_out
, endian
);
1386 ret
= write_cache(&page_data
, buf_out
, size_out
, false);
1388 dump_error(s
, "dump: failed to write page data.\n");
1394 * fall back to save in plaintext, size_out should be
1395 * assigned TARGET_PAGE_SIZE
1397 pd
.flags
= cpu_convert_to_target32(0, endian
);
1398 size_out
= TARGET_PAGE_SIZE
;
1399 pd
.size
= cpu_convert_to_target32(size_out
, endian
);
1401 ret
= write_cache(&page_data
, buf
, TARGET_PAGE_SIZE
, false);
1403 dump_error(s
, "dump: failed to write page data.\n");
1408 /* get and write page desc here */
1409 pd
.page_flags
= cpu_convert_to_target64(0, endian
);
1410 pd
.offset
= cpu_convert_to_target64(offset_data
, endian
);
1411 offset_data
+= size_out
;
1413 ret
= write_cache(&page_desc
, &pd
, sizeof(PageDescriptor
), false);
1415 dump_error(s
, "dump: failed to write page desc.\n");
1421 ret
= write_cache(&page_desc
, NULL
, 0, true);
1423 dump_error(s
, "dump: failed to sync cache for page_desc.\n");
1426 ret
= write_cache(&page_data
, NULL
, 0, true);
1428 dump_error(s
, "dump: failed to sync cache for page_data.\n");
1433 free_data_cache(&page_desc
);
1434 free_data_cache(&page_data
);
1445 static int create_kdump_vmcore(DumpState
*s
)
1450 * the kdump-compressed format is:
1452 * +------------------------------------------+ 0x0
1453 * | main header (struct disk_dump_header) |
1454 * |------------------------------------------+ block 1
1455 * | sub header (struct kdump_sub_header) |
1456 * |------------------------------------------+ block 2
1457 * | 1st-dump_bitmap |
1458 * |------------------------------------------+ block 2 + X blocks
1459 * | 2nd-dump_bitmap | (aligned by block)
1460 * |------------------------------------------+ block 2 + 2 * X blocks
1461 * | page desc for pfn 0 (struct page_desc) | (aligned by block)
1462 * | page desc for pfn 1 (struct page_desc) |
1464 * |------------------------------------------| (not aligned by block)
1465 * | page data (pfn 0) |
1466 * | page data (pfn 1) |
1468 * +------------------------------------------+
1471 ret
= write_start_flat_header(s
->fd
);
1473 dump_error(s
, "dump: failed to write start flat header.\n");
1477 ret
= write_dump_header(s
);
1482 ret
= write_dump_bitmap(s
);
1487 ret
= write_dump_pages(s
);
1492 ret
= write_end_flat_header(s
->fd
);
1494 dump_error(s
, "dump: failed to write end flat header.\n");
1503 static ram_addr_t
get_start_block(DumpState
*s
)
1505 GuestPhysBlock
*block
;
1507 if (!s
->has_filter
) {
1508 s
->next_block
= QTAILQ_FIRST(&s
->guest_phys_blocks
.head
);
1512 QTAILQ_FOREACH(block
, &s
->guest_phys_blocks
.head
, next
) {
1513 if (block
->target_start
>= s
->begin
+ s
->length
||
1514 block
->target_end
<= s
->begin
) {
1515 /* This block is out of the range */
1519 s
->next_block
= block
;
1520 if (s
->begin
> block
->target_start
) {
1521 s
->start
= s
->begin
- block
->target_start
;
1531 static void get_max_mapnr(DumpState
*s
)
1533 GuestPhysBlock
*last_block
;
1535 last_block
= QTAILQ_LAST(&s
->guest_phys_blocks
.head
, GuestPhysBlockHead
);
1536 s
->max_mapnr
= paddr_to_pfn(last_block
->target_end
);
1539 static int dump_init(DumpState
*s
, int fd
, bool has_format
,
1540 DumpGuestMemoryFormat format
, bool paging
, bool has_filter
,
1541 int64_t begin
, int64_t length
, Error
**errp
)
1548 /* kdump-compressed is conflict with paging and filter */
1549 if (has_format
&& format
!= DUMP_GUEST_MEMORY_FORMAT_ELF
) {
1550 assert(!paging
&& !has_filter
);
1553 if (runstate_is_running()) {
1554 vm_stop(RUN_STATE_SAVE_VM
);
1560 /* If we use KVM, we should synchronize the registers before we get dump
1561 * info or physmap info.
1563 cpu_synchronize_all_states();
1570 s
->has_filter
= has_filter
;
1574 guest_phys_blocks_init(&s
->guest_phys_blocks
);
1575 guest_phys_blocks_append(&s
->guest_phys_blocks
);
1577 s
->start
= get_start_block(s
);
1578 if (s
->start
== -1) {
1579 error_set(errp
, QERR_INVALID_PARAMETER
, "begin");
1583 /* get dump info: endian, class and architecture.
1584 * If the target architecture is not supported, cpu_get_dump_info() will
1587 ret
= cpu_get_dump_info(&s
->dump_info
, &s
->guest_phys_blocks
);
1589 error_set(errp
, QERR_UNSUPPORTED
);
1593 s
->note_size
= cpu_get_note_size(s
->dump_info
.d_class
,
1594 s
->dump_info
.d_machine
, nr_cpus
);
1595 if (s
->note_size
< 0) {
1596 error_set(errp
, QERR_UNSUPPORTED
);
1600 /* get memory mapping */
1601 memory_mapping_list_init(&s
->list
);
1603 qemu_get_guest_memory_mapping(&s
->list
, &s
->guest_phys_blocks
, &err
);
1605 error_propagate(errp
, err
);
1609 qemu_get_guest_simple_memory_mapping(&s
->list
, &s
->guest_phys_blocks
);
1612 s
->nr_cpus
= nr_cpus
;
1617 tmp
= DIV_ROUND_UP(DIV_ROUND_UP(s
->max_mapnr
, CHAR_BIT
), TARGET_PAGE_SIZE
);
1618 s
->len_dump_bitmap
= tmp
* TARGET_PAGE_SIZE
;
1620 /* init for kdump-compressed format */
1621 if (has_format
&& format
!= DUMP_GUEST_MEMORY_FORMAT_ELF
) {
1623 case DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB
:
1624 s
->flag_compress
= DUMP_DH_COMPRESSED_ZLIB
;
1627 case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO
:
1628 s
->flag_compress
= DUMP_DH_COMPRESSED_LZO
;
1631 case DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY
:
1632 s
->flag_compress
= DUMP_DH_COMPRESSED_SNAPPY
;
1636 s
->flag_compress
= 0;
1642 if (s
->has_filter
) {
1643 memory_mapping_filter(&s
->list
, s
->begin
, s
->length
);
1647 * calculate phdr_num
1649 * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow
1651 s
->phdr_num
= 1; /* PT_NOTE */
1652 if (s
->list
.num
< UINT16_MAX
- 2) {
1653 s
->phdr_num
+= s
->list
.num
;
1654 s
->have_section
= false;
1656 s
->have_section
= true;
1657 s
->phdr_num
= PN_XNUM
;
1658 s
->sh_info
= 1; /* PT_NOTE */
1660 /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
1661 if (s
->list
.num
<= UINT32_MAX
- 1) {
1662 s
->sh_info
+= s
->list
.num
;
1664 s
->sh_info
= UINT32_MAX
;
1668 if (s
->dump_info
.d_class
== ELFCLASS64
) {
1669 if (s
->have_section
) {
1670 s
->memory_offset
= sizeof(Elf64_Ehdr
) +
1671 sizeof(Elf64_Phdr
) * s
->sh_info
+
1672 sizeof(Elf64_Shdr
) + s
->note_size
;
1674 s
->memory_offset
= sizeof(Elf64_Ehdr
) +
1675 sizeof(Elf64_Phdr
) * s
->phdr_num
+ s
->note_size
;
1678 if (s
->have_section
) {
1679 s
->memory_offset
= sizeof(Elf32_Ehdr
) +
1680 sizeof(Elf32_Phdr
) * s
->sh_info
+
1681 sizeof(Elf32_Shdr
) + s
->note_size
;
1683 s
->memory_offset
= sizeof(Elf32_Ehdr
) +
1684 sizeof(Elf32_Phdr
) * s
->phdr_num
+ s
->note_size
;
1691 guest_phys_blocks_free(&s
->guest_phys_blocks
);
1700 void qmp_dump_guest_memory(bool paging
, const char *file
, bool has_begin
,
1701 int64_t begin
, bool has_length
,
1702 int64_t length
, bool has_format
,
1703 DumpGuestMemoryFormat format
, Error
**errp
)
1711 * kdump-compressed format need the whole memory dumped, so paging or
1712 * filter is not supported here.
1714 if ((has_format
&& format
!= DUMP_GUEST_MEMORY_FORMAT_ELF
) &&
1715 (paging
|| has_begin
|| has_length
)) {
1716 error_setg(errp
, "kdump-compressed format doesn't support paging or "
1720 if (has_begin
&& !has_length
) {
1721 error_set(errp
, QERR_MISSING_PARAMETER
, "length");
1724 if (!has_begin
&& has_length
) {
1725 error_set(errp
, QERR_MISSING_PARAMETER
, "begin");
1729 /* check whether lzo/snappy is supported */
1731 if (has_format
&& format
== DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO
) {
1732 error_setg(errp
, "kdump-lzo is not available now");
1737 #ifndef CONFIG_SNAPPY
1738 if (has_format
&& format
== DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY
) {
1739 error_setg(errp
, "kdump-snappy is not available now");
1745 if (strstart(file
, "fd:", &p
)) {
1746 fd
= monitor_get_fd(cur_mon
, p
, errp
);
1753 if (strstart(file
, "file:", &p
)) {
1754 fd
= qemu_open(p
, O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
, S_IRUSR
);
1756 error_setg_file_open(errp
, errno
, p
);
1762 error_set(errp
, QERR_INVALID_PARAMETER
, "protocol");
1766 s
= g_malloc0(sizeof(DumpState
));
1768 ret
= dump_init(s
, fd
, has_format
, format
, paging
, has_begin
,
1769 begin
, length
, errp
);
1775 if (has_format
&& format
!= DUMP_GUEST_MEMORY_FORMAT_ELF
) {
1776 if (create_kdump_vmcore(s
) < 0) {
1777 error_set(errp
, QERR_IO_ERROR
);
1780 if (create_vmcore(s
) < 0) {
1781 error_set(errp
, QERR_IO_ERROR
);
1788 DumpGuestMemoryCapability
*qmp_query_dump_guest_memory_capability(Error
**errp
)
1790 DumpGuestMemoryFormatList
*item
;
1791 DumpGuestMemoryCapability
*cap
=
1792 g_malloc0(sizeof(DumpGuestMemoryCapability
));
1794 /* elf is always available */
1795 item
= g_malloc0(sizeof(DumpGuestMemoryFormatList
));
1796 cap
->formats
= item
;
1797 item
->value
= DUMP_GUEST_MEMORY_FORMAT_ELF
;
1799 /* kdump-zlib is always available */
1800 item
->next
= g_malloc0(sizeof(DumpGuestMemoryFormatList
));
1802 item
->value
= DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB
;
1804 /* add new item if kdump-lzo is available */
1806 item
->next
= g_malloc0(sizeof(DumpGuestMemoryFormatList
));
1808 item
->value
= DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO
;
1811 /* add new item if kdump-snappy is available */
1812 #ifdef CONFIG_SNAPPY
1813 item
->next
= g_malloc0(sizeof(DumpGuestMemoryFormatList
));
1815 item
->value
= DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY
;