4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 /* Needed early for HOST_BSD etc. */
33 #include "config-host.h"
36 #include <sys/times.h>
40 #include <sys/ioctl.h>
41 #include <sys/resource.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
45 #if defined(__NetBSD__)
46 #include <net/if_tap.h>
49 #include <linux/if_tun.h>
51 #include <arpa/inet.h>
54 #include <sys/select.h>
57 #if defined(__FreeBSD__) || defined(__DragonFly__)
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.h>
68 #include <linux/rtc.h>
76 #include <sys/timeb.h>
78 #define getopt_long_only getopt_long
79 #define memalign(align, size) malloc(size)
82 #include "qemu-common.h"
87 #include "qemu-timer.h"
88 #include "qemu-char.h"
90 #include "audio/audio.h"
91 #include "migration.h"
92 #include "qemu_socket.h"
94 /* point to the block driver where the snapshots are managed */
95 static BlockDriverState
*bs_snapshots
;
97 #define SELF_ANNOUNCE_ROUNDS 5
98 #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
99 //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
100 #define EXPERIMENTAL_MAGIC 0xf1f23f4f
102 static int announce_self_create(uint8_t *buf
,
105 uint32_t magic
= EXPERIMENTAL_MAGIC
;
106 uint16_t proto
= htons(ETH_P_EXPERIMENTAL
);
108 /* FIXME: should we send a different packet (arp/rarp/ping)? */
111 memset(buf
, 0xff, 6); /* h_dst */
112 memcpy(buf
+ 6, mac_addr
, 6); /* h_src */
113 memcpy(buf
+ 12, &proto
, 2); /* h_proto */
114 memcpy(buf
+ 14, &magic
, 4); /* magic */
119 static void qemu_announce_self_once(void *opaque
)
125 static int count
= SELF_ANNOUNCE_ROUNDS
;
126 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
128 for (i
= 0; i
< MAX_NICS
; i
++) {
129 if (!nd_table
[i
].used
)
131 len
= announce_self_create(buf
, nd_table
[i
].macaddr
);
132 vlan
= nd_table
[i
].vlan
;
133 for(vc
= vlan
->first_client
; vc
!= NULL
; vc
= vc
->next
) {
134 vc
->fd_read(vc
->opaque
, buf
, len
);
138 qemu_mod_timer(timer
, qemu_get_clock(rt_clock
) + 100);
140 qemu_del_timer(timer
);
141 qemu_free_timer(timer
);
145 void qemu_announce_self(void)
147 static QEMUTimer
*timer
;
148 timer
= qemu_new_timer(rt_clock
, qemu_announce_self_once
, &timer
);
149 qemu_announce_self_once(&timer
);
152 /***********************************************************/
153 /* savevm/loadvm support */
155 #define IO_BUF_SIZE 32768
158 QEMUFilePutBufferFunc
*put_buffer
;
159 QEMUFileGetBufferFunc
*get_buffer
;
160 QEMUFileCloseFunc
*close
;
161 QEMUFileRateLimit
*rate_limit
;
165 int64_t buf_offset
; /* start of buffer when writing, end of buffer
168 int buf_size
; /* 0 when writing */
169 uint8_t buf
[IO_BUF_SIZE
];
174 typedef struct QEMUFilePopen
180 typedef struct QEMUFileSocket
186 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
188 QEMUFileSocket
*s
= opaque
;
192 len
= recv(s
->fd
, buf
, size
, 0);
193 } while (len
== -1 && socket_error() == EINTR
);
196 len
= -socket_error();
201 static int socket_close(void *opaque
)
203 QEMUFileSocket
*s
= opaque
;
208 static int popen_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
210 QEMUFilePopen
*s
= opaque
;
211 return fwrite(buf
, 1, size
, s
->popen_file
);
214 static int popen_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
216 QEMUFilePopen
*s
= opaque
;
217 return fread(buf
, 1, size
, s
->popen_file
);
220 static int popen_close(void *opaque
)
222 QEMUFilePopen
*s
= opaque
;
223 pclose(s
->popen_file
);
228 QEMUFile
*qemu_popen(FILE *popen_file
, const char *mode
)
232 if (popen_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
233 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
237 s
= qemu_mallocz(sizeof(QEMUFilePopen
));
239 s
->popen_file
= popen_file
;
242 s
->file
= qemu_fopen_ops(s
, NULL
, popen_get_buffer
, popen_close
, NULL
);
244 s
->file
= qemu_fopen_ops(s
, popen_put_buffer
, NULL
, popen_close
, NULL
);
246 fprintf(stderr
, "qemu_popen: returning result of qemu_fopen_ops\n");
250 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
254 popen_file
= popen(command
, mode
);
255 if(popen_file
== NULL
) {
259 return qemu_popen(popen_file
, mode
);
262 QEMUFile
*qemu_fopen_socket(int fd
)
264 QEMUFileSocket
*s
= qemu_mallocz(sizeof(QEMUFileSocket
));
267 s
->file
= qemu_fopen_ops(s
, NULL
, socket_get_buffer
, socket_close
, NULL
);
271 typedef struct QEMUFileStdio
276 static int file_put_buffer(void *opaque
, const uint8_t *buf
,
277 int64_t pos
, int size
)
279 QEMUFileStdio
*s
= opaque
;
280 fseek(s
->outfile
, pos
, SEEK_SET
);
281 fwrite(buf
, 1, size
, s
->outfile
);
285 static int file_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
287 QEMUFileStdio
*s
= opaque
;
288 fseek(s
->outfile
, pos
, SEEK_SET
);
289 return fread(buf
, 1, size
, s
->outfile
);
292 static int file_close(void *opaque
)
294 QEMUFileStdio
*s
= opaque
;
300 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
304 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
306 s
->outfile
= fopen(filename
, mode
);
310 if (!strcmp(mode
, "wb"))
311 return qemu_fopen_ops(s
, file_put_buffer
, NULL
, file_close
, NULL
);
312 else if (!strcmp(mode
, "rb"))
313 return qemu_fopen_ops(s
, NULL
, file_get_buffer
, file_close
, NULL
);
322 typedef struct QEMUFileBdrv
324 BlockDriverState
*bs
;
328 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
329 int64_t pos
, int size
)
331 QEMUFileBdrv
*s
= opaque
;
332 bdrv_put_buffer(s
->bs
, buf
, s
->base_offset
+ pos
, size
);
336 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
338 QEMUFileBdrv
*s
= opaque
;
339 return bdrv_get_buffer(s
->bs
, buf
, s
->base_offset
+ pos
, size
);
342 static int bdrv_fclose(void *opaque
)
344 QEMUFileBdrv
*s
= opaque
;
349 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int64_t offset
, int is_writable
)
353 s
= qemu_mallocz(sizeof(QEMUFileBdrv
));
356 s
->base_offset
= offset
;
359 return qemu_fopen_ops(s
, block_put_buffer
, NULL
, bdrv_fclose
, NULL
);
361 return qemu_fopen_ops(s
, NULL
, block_get_buffer
, bdrv_fclose
, NULL
);
364 QEMUFile
*qemu_fopen_ops(void *opaque
, QEMUFilePutBufferFunc
*put_buffer
,
365 QEMUFileGetBufferFunc
*get_buffer
,
366 QEMUFileCloseFunc
*close
,
367 QEMUFileRateLimit
*rate_limit
)
371 f
= qemu_mallocz(sizeof(QEMUFile
));
374 f
->put_buffer
= put_buffer
;
375 f
->get_buffer
= get_buffer
;
377 f
->rate_limit
= rate_limit
;
383 int qemu_file_has_error(QEMUFile
*f
)
388 void qemu_file_set_error(QEMUFile
*f
)
393 void qemu_fflush(QEMUFile
*f
)
398 if (f
->is_write
&& f
->buf_index
> 0) {
401 len
= f
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
403 f
->buf_offset
+= f
->buf_index
;
410 static void qemu_fill_buffer(QEMUFile
*f
)
420 len
= f
->get_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, IO_BUF_SIZE
);
424 f
->buf_offset
+= len
;
425 } else if (len
!= -EAGAIN
)
429 int qemu_fclose(QEMUFile
*f
)
434 ret
= f
->close(f
->opaque
);
439 void qemu_file_put_notify(QEMUFile
*f
)
441 f
->put_buffer(f
->opaque
, NULL
, 0, 0);
444 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
448 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
450 "Attempted to write to buffer while read buffer is not empty\n");
454 while (!f
->has_error
&& size
> 0) {
455 l
= IO_BUF_SIZE
- f
->buf_index
;
458 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
463 if (f
->buf_index
>= IO_BUF_SIZE
)
468 void qemu_put_byte(QEMUFile
*f
, int v
)
470 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
472 "Attempted to write to buffer while read buffer is not empty\n");
476 f
->buf
[f
->buf_index
++] = v
;
478 if (f
->buf_index
>= IO_BUF_SIZE
)
482 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size1
)
491 l
= f
->buf_size
- f
->buf_index
;
494 l
= f
->buf_size
- f
->buf_index
;
500 memcpy(buf
, f
->buf
+ f
->buf_index
, l
);
508 int qemu_get_byte(QEMUFile
*f
)
513 if (f
->buf_index
>= f
->buf_size
) {
515 if (f
->buf_index
>= f
->buf_size
)
518 return f
->buf
[f
->buf_index
++];
521 int64_t qemu_ftell(QEMUFile
*f
)
523 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
526 int64_t qemu_fseek(QEMUFile
*f
, int64_t pos
, int whence
)
528 if (whence
== SEEK_SET
) {
530 } else if (whence
== SEEK_CUR
) {
531 pos
+= qemu_ftell(f
);
533 /* SEEK_END not supported */
547 int qemu_file_rate_limit(QEMUFile
*f
)
550 return f
->rate_limit(f
->opaque
);
555 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
557 qemu_put_byte(f
, v
>> 8);
561 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
563 qemu_put_byte(f
, v
>> 24);
564 qemu_put_byte(f
, v
>> 16);
565 qemu_put_byte(f
, v
>> 8);
569 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
571 qemu_put_be32(f
, v
>> 32);
575 unsigned int qemu_get_be16(QEMUFile
*f
)
578 v
= qemu_get_byte(f
) << 8;
579 v
|= qemu_get_byte(f
);
583 unsigned int qemu_get_be32(QEMUFile
*f
)
586 v
= qemu_get_byte(f
) << 24;
587 v
|= qemu_get_byte(f
) << 16;
588 v
|= qemu_get_byte(f
) << 8;
589 v
|= qemu_get_byte(f
);
593 uint64_t qemu_get_be64(QEMUFile
*f
)
596 v
= (uint64_t)qemu_get_be32(f
) << 32;
597 v
|= qemu_get_be32(f
);
601 typedef struct SaveStateEntry
{
606 SaveLiveStateHandler
*save_live_state
;
607 SaveStateHandler
*save_state
;
608 LoadStateHandler
*load_state
;
610 struct SaveStateEntry
*next
;
613 static SaveStateEntry
*first_se
;
615 /* TODO: Individual devices generally have very little idea about the rest
616 of the system, so instance_id should be removed/replaced.
617 Meanwhile pass -1 as instance_id if you do not already have a clearly
618 distinguishing id for all instances of your device class. */
619 int register_savevm_live(const char *idstr
,
622 SaveLiveStateHandler
*save_live_state
,
623 SaveStateHandler
*save_state
,
624 LoadStateHandler
*load_state
,
627 SaveStateEntry
*se
, **pse
;
628 static int global_section_id
;
630 se
= qemu_malloc(sizeof(SaveStateEntry
));
631 pstrcpy(se
->idstr
, sizeof(se
->idstr
), idstr
);
632 se
->instance_id
= (instance_id
== -1) ? 0 : instance_id
;
633 se
->version_id
= version_id
;
634 se
->section_id
= global_section_id
++;
635 se
->save_live_state
= save_live_state
;
636 se
->save_state
= save_state
;
637 se
->load_state
= load_state
;
641 /* add at the end of list */
643 while (*pse
!= NULL
) {
644 if (instance_id
== -1
645 && strcmp(se
->idstr
, (*pse
)->idstr
) == 0
646 && se
->instance_id
<= (*pse
)->instance_id
)
647 se
->instance_id
= (*pse
)->instance_id
+ 1;
654 int register_savevm(const char *idstr
,
657 SaveStateHandler
*save_state
,
658 LoadStateHandler
*load_state
,
661 return register_savevm_live(idstr
, instance_id
, version_id
,
662 NULL
, save_state
, load_state
, opaque
);
665 void unregister_savevm(const char *idstr
, void *opaque
)
667 SaveStateEntry
**pse
;
670 while (*pse
!= NULL
) {
671 if (strcmp((*pse
)->idstr
, idstr
) == 0 && (*pse
)->opaque
== opaque
) {
672 SaveStateEntry
*next
= (*pse
)->next
;
681 #define QEMU_VM_FILE_MAGIC 0x5145564d
682 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
683 #define QEMU_VM_FILE_VERSION 0x00000003
685 #define QEMU_VM_EOF 0x00
686 #define QEMU_VM_SECTION_START 0x01
687 #define QEMU_VM_SECTION_PART 0x02
688 #define QEMU_VM_SECTION_END 0x03
689 #define QEMU_VM_SECTION_FULL 0x04
691 int qemu_savevm_state_begin(QEMUFile
*f
)
695 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
696 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
698 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
701 if (se
->save_live_state
== NULL
)
705 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
706 qemu_put_be32(f
, se
->section_id
);
709 len
= strlen(se
->idstr
);
710 qemu_put_byte(f
, len
);
711 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
713 qemu_put_be32(f
, se
->instance_id
);
714 qemu_put_be32(f
, se
->version_id
);
716 se
->save_live_state(f
, QEMU_VM_SECTION_START
, se
->opaque
);
719 if (qemu_file_has_error(f
))
725 int qemu_savevm_state_iterate(QEMUFile
*f
)
730 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
731 if (se
->save_live_state
== NULL
)
735 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
736 qemu_put_be32(f
, se
->section_id
);
738 ret
&= !!se
->save_live_state(f
, QEMU_VM_SECTION_PART
, se
->opaque
);
744 if (qemu_file_has_error(f
))
750 int qemu_savevm_state_complete(QEMUFile
*f
)
754 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
755 if (se
->save_live_state
== NULL
)
759 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
760 qemu_put_be32(f
, se
->section_id
);
762 se
->save_live_state(f
, QEMU_VM_SECTION_END
, se
->opaque
);
765 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
768 if (se
->save_state
== NULL
)
772 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
773 qemu_put_be32(f
, se
->section_id
);
776 len
= strlen(se
->idstr
);
777 qemu_put_byte(f
, len
);
778 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
780 qemu_put_be32(f
, se
->instance_id
);
781 qemu_put_be32(f
, se
->version_id
);
783 se
->save_state(f
, se
->opaque
);
786 qemu_put_byte(f
, QEMU_VM_EOF
);
788 if (qemu_file_has_error(f
))
794 int qemu_savevm_state(QEMUFile
*f
)
796 int saved_vm_running
;
799 saved_vm_running
= vm_running
;
804 ret
= qemu_savevm_state_begin(f
);
809 ret
= qemu_savevm_state_iterate(f
);
814 ret
= qemu_savevm_state_complete(f
);
817 if (qemu_file_has_error(f
))
820 if (!ret
&& saved_vm_running
)
826 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
830 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
831 if (!strcmp(se
->idstr
, idstr
) &&
832 instance_id
== se
->instance_id
)
838 typedef struct LoadStateEntry
{
842 struct LoadStateEntry
*next
;
845 static int qemu_loadvm_state_v2(QEMUFile
*f
)
848 int len
, ret
, instance_id
, record_len
, version_id
;
849 int64_t total_len
, end_pos
, cur_pos
;
852 total_len
= qemu_get_be64(f
);
853 end_pos
= total_len
+ qemu_ftell(f
);
855 if (qemu_ftell(f
) >= end_pos
)
857 len
= qemu_get_byte(f
);
858 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
860 instance_id
= qemu_get_be32(f
);
861 version_id
= qemu_get_be32(f
);
862 record_len
= qemu_get_be32(f
);
863 cur_pos
= qemu_ftell(f
);
864 se
= find_se(idstr
, instance_id
);
866 fprintf(stderr
, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
869 ret
= se
->load_state(f
, se
->opaque
, version_id
);
871 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
876 /* always seek to exact end of record */
877 qemu_fseek(f
, cur_pos
+ record_len
, SEEK_SET
);
880 if (qemu_file_has_error(f
))
886 int qemu_loadvm_state(QEMUFile
*f
)
888 LoadStateEntry
*first_le
= NULL
;
889 uint8_t section_type
;
893 v
= qemu_get_be32(f
);
894 if (v
!= QEMU_VM_FILE_MAGIC
)
897 v
= qemu_get_be32(f
);
898 if (v
== QEMU_VM_FILE_VERSION_COMPAT
)
899 return qemu_loadvm_state_v2(f
);
900 if (v
!= QEMU_VM_FILE_VERSION
)
903 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
904 uint32_t instance_id
, version_id
, section_id
;
910 switch (section_type
) {
911 case QEMU_VM_SECTION_START
:
912 case QEMU_VM_SECTION_FULL
:
913 /* Read section start */
914 section_id
= qemu_get_be32(f
);
915 len
= qemu_get_byte(f
);
916 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
918 instance_id
= qemu_get_be32(f
);
919 version_id
= qemu_get_be32(f
);
921 /* Find savevm section */
922 se
= find_se(idstr
, instance_id
);
924 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
929 /* Validate version */
930 if (version_id
> se
->version_id
) {
931 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
932 version_id
, idstr
, se
->version_id
);
938 le
= qemu_mallocz(sizeof(*le
));
941 le
->section_id
= section_id
;
942 le
->version_id
= version_id
;
946 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
948 case QEMU_VM_SECTION_PART
:
949 case QEMU_VM_SECTION_END
:
950 section_id
= qemu_get_be32(f
);
952 for (le
= first_le
; le
&& le
->section_id
!= section_id
; le
= le
->next
);
954 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
959 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
962 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
972 LoadStateEntry
*le
= first_le
;
973 first_le
= first_le
->next
;
977 if (qemu_file_has_error(f
))
983 /* device can contain snapshots */
984 static int bdrv_can_snapshot(BlockDriverState
*bs
)
987 !bdrv_is_removable(bs
) &&
988 !bdrv_is_read_only(bs
));
991 /* device must be snapshots in order to have a reliable snapshot */
992 static int bdrv_has_snapshot(BlockDriverState
*bs
)
995 !bdrv_is_removable(bs
) &&
996 !bdrv_is_read_only(bs
));
999 static BlockDriverState
*get_bs_snapshots(void)
1001 BlockDriverState
*bs
;
1005 return bs_snapshots
;
1006 for(i
= 0; i
<= nb_drives
; i
++) {
1007 bs
= drives_table
[i
].bdrv
;
1008 if (bdrv_can_snapshot(bs
))
1017 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
1020 QEMUSnapshotInfo
*sn_tab
, *sn
;
1024 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1027 for(i
= 0; i
< nb_sns
; i
++) {
1029 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
1039 void do_savevm(Monitor
*mon
, const char *name
)
1041 BlockDriverState
*bs
, *bs1
;
1042 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
1043 int must_delete
, ret
, i
;
1044 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1046 int saved_vm_running
;
1047 uint32_t vm_state_size
;
1054 bs
= get_bs_snapshots();
1056 monitor_printf(mon
, "No block device can accept snapshots\n");
1060 /* ??? Should this occur after vm_stop? */
1063 saved_vm_running
= vm_running
;
1068 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
1073 memset(sn
, 0, sizeof(*sn
));
1075 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
1076 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
1079 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1082 /* fill auxiliary fields */
1085 sn
->date_sec
= tb
.time
;
1086 sn
->date_nsec
= tb
.millitm
* 1000000;
1088 gettimeofday(&tv
, NULL
);
1089 sn
->date_sec
= tv
.tv_sec
;
1090 sn
->date_nsec
= tv
.tv_usec
* 1000;
1092 sn
->vm_clock_nsec
= qemu_get_clock(vm_clock
);
1094 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1095 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1096 bdrv_get_device_name(bs
));
1100 /* save the VM state */
1101 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 1);
1103 monitor_printf(mon
, "Could not open VM state file\n");
1106 ret
= qemu_savevm_state(f
);
1107 vm_state_size
= qemu_ftell(f
);
1110 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
1114 /* create the snapshots */
1116 for(i
= 0; i
< nb_drives
; i
++) {
1117 bs1
= drives_table
[i
].bdrv
;
1118 if (bdrv_has_snapshot(bs1
)) {
1120 ret
= bdrv_snapshot_delete(bs1
, old_sn
->id_str
);
1123 "Error while deleting snapshot on '%s'\n",
1124 bdrv_get_device_name(bs1
));
1127 /* Write VM state size only to the image that contains the state */
1128 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
1129 ret
= bdrv_snapshot_create(bs1
, sn
);
1131 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
1132 bdrv_get_device_name(bs1
));
1138 if (saved_vm_running
)
1142 void do_loadvm(Monitor
*mon
, const char *name
)
1144 BlockDriverState
*bs
, *bs1
;
1145 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1146 QEMUSnapshotInfo sn
;
1149 int saved_vm_running
;
1151 bs
= get_bs_snapshots();
1153 monitor_printf(mon
, "No block device supports snapshots\n");
1157 /* Flush all IO requests so they don't interfere with the new state. */
1160 saved_vm_running
= vm_running
;
1163 for(i
= 0; i
<= nb_drives
; i
++) {
1164 bs1
= drives_table
[i
].bdrv
;
1165 if (bdrv_has_snapshot(bs1
)) {
1166 ret
= bdrv_snapshot_goto(bs1
, name
);
1169 monitor_printf(mon
, "Warning: ");
1173 "Snapshots not supported on device '%s'\n",
1174 bdrv_get_device_name(bs1
));
1177 monitor_printf(mon
, "Could not find snapshot '%s' on "
1179 name
, bdrv_get_device_name(bs1
));
1182 monitor_printf(mon
, "Error %d while activating snapshot on"
1183 " '%s'\n", ret
, bdrv_get_device_name(bs1
));
1186 /* fatal on snapshot block device */
1193 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1194 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1195 bdrv_get_device_name(bs
));
1199 /* Don't even try to load empty VM states */
1200 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
1201 if ((ret
>= 0) && (sn
.vm_state_size
== 0))
1204 /* restore the VM state */
1205 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 0);
1207 monitor_printf(mon
, "Could not open VM state file\n");
1210 ret
= qemu_loadvm_state(f
);
1213 monitor_printf(mon
, "Error %d while loading VM state\n", ret
);
1216 if (saved_vm_running
)
1220 void do_delvm(Monitor
*mon
, const char *name
)
1222 BlockDriverState
*bs
, *bs1
;
1225 bs
= get_bs_snapshots();
1227 monitor_printf(mon
, "No block device supports snapshots\n");
1231 for(i
= 0; i
<= nb_drives
; i
++) {
1232 bs1
= drives_table
[i
].bdrv
;
1233 if (bdrv_has_snapshot(bs1
)) {
1234 ret
= bdrv_snapshot_delete(bs1
, name
);
1236 if (ret
== -ENOTSUP
)
1238 "Snapshots not supported on device '%s'\n",
1239 bdrv_get_device_name(bs1
));
1241 monitor_printf(mon
, "Error %d while deleting snapshot on "
1242 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
1248 void do_info_snapshots(Monitor
*mon
)
1250 BlockDriverState
*bs
, *bs1
;
1251 QEMUSnapshotInfo
*sn_tab
, *sn
;
1255 bs
= get_bs_snapshots();
1257 monitor_printf(mon
, "No available block device supports snapshots\n");
1260 monitor_printf(mon
, "Snapshot devices:");
1261 for(i
= 0; i
<= nb_drives
; i
++) {
1262 bs1
= drives_table
[i
].bdrv
;
1263 if (bdrv_has_snapshot(bs1
)) {
1265 monitor_printf(mon
, " %s", bdrv_get_device_name(bs1
));
1268 monitor_printf(mon
, "\n");
1270 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1272 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
1275 monitor_printf(mon
, "Snapshot list (from %s):\n",
1276 bdrv_get_device_name(bs
));
1277 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
1278 for(i
= 0; i
< nb_sns
; i
++) {
1280 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));