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
->receive(vc
, 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
;
162 QEMUFileSetRateLimit
*set_rate_limit
;
166 int64_t buf_offset
; /* start of buffer when writing, end of buffer
169 int buf_size
; /* 0 when writing */
170 uint8_t buf
[IO_BUF_SIZE
];
175 typedef struct QEMUFilePopen
181 typedef struct QEMUFileSocket
187 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
189 QEMUFileSocket
*s
= opaque
;
193 len
= recv(s
->fd
, (void *)buf
, size
, 0);
194 } while (len
== -1 && socket_error() == EINTR
);
197 len
= -socket_error();
202 static int socket_close(void *opaque
)
204 QEMUFileSocket
*s
= opaque
;
209 static int popen_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
211 QEMUFilePopen
*s
= opaque
;
212 return fwrite(buf
, 1, size
, s
->popen_file
);
215 static int popen_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
217 QEMUFilePopen
*s
= opaque
;
218 FILE *fp
= s
->popen_file
;
223 bytes
= fread(buf
, 1, size
, fp
);
224 } while ((bytes
== 0) && ferror(fp
) && (errno
== EINTR
));
228 static int popen_close(void *opaque
)
230 QEMUFilePopen
*s
= opaque
;
231 pclose(s
->popen_file
);
236 QEMUFile
*qemu_popen(FILE *popen_file
, const char *mode
)
240 if (popen_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
241 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
245 s
= qemu_mallocz(sizeof(QEMUFilePopen
));
247 s
->popen_file
= popen_file
;
250 s
->file
= qemu_fopen_ops(s
, NULL
, popen_get_buffer
, popen_close
, NULL
, NULL
);
252 s
->file
= qemu_fopen_ops(s
, popen_put_buffer
, NULL
, popen_close
, NULL
, NULL
);
257 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
261 popen_file
= popen(command
, mode
);
262 if(popen_file
== NULL
) {
266 return qemu_popen(popen_file
, mode
);
269 int qemu_popen_fd(QEMUFile
*f
)
274 p
= (QEMUFilePopen
*)f
->opaque
;
275 fd
= fileno(p
->popen_file
);
280 QEMUFile
*qemu_fopen_socket(int fd
)
282 QEMUFileSocket
*s
= qemu_mallocz(sizeof(QEMUFileSocket
));
285 s
->file
= qemu_fopen_ops(s
, NULL
, socket_get_buffer
, socket_close
, NULL
, NULL
);
289 typedef struct QEMUFileStdio
294 static int file_put_buffer(void *opaque
, const uint8_t *buf
,
295 int64_t pos
, int size
)
297 QEMUFileStdio
*s
= opaque
;
298 fseek(s
->outfile
, pos
, SEEK_SET
);
299 fwrite(buf
, 1, size
, s
->outfile
);
303 static int file_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
305 QEMUFileStdio
*s
= opaque
;
306 fseek(s
->outfile
, pos
, SEEK_SET
);
307 return fread(buf
, 1, size
, s
->outfile
);
310 static int file_close(void *opaque
)
312 QEMUFileStdio
*s
= opaque
;
318 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
322 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
324 s
->outfile
= fopen(filename
, mode
);
328 if (!strcmp(mode
, "wb"))
329 return qemu_fopen_ops(s
, file_put_buffer
, NULL
, file_close
, NULL
, NULL
);
330 else if (!strcmp(mode
, "rb"))
331 return qemu_fopen_ops(s
, NULL
, file_get_buffer
, file_close
, NULL
, NULL
);
340 typedef struct QEMUFileBdrv
342 BlockDriverState
*bs
;
346 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
347 int64_t pos
, int size
)
349 QEMUFileBdrv
*s
= opaque
;
350 bdrv_put_buffer(s
->bs
, buf
, s
->base_offset
+ pos
, size
);
354 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
356 QEMUFileBdrv
*s
= opaque
;
357 return bdrv_get_buffer(s
->bs
, buf
, s
->base_offset
+ pos
, size
);
360 static int bdrv_fclose(void *opaque
)
362 QEMUFileBdrv
*s
= opaque
;
367 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int64_t offset
, int is_writable
)
371 s
= qemu_mallocz(sizeof(QEMUFileBdrv
));
374 s
->base_offset
= offset
;
377 return qemu_fopen_ops(s
, block_put_buffer
, NULL
, bdrv_fclose
, NULL
, NULL
);
379 return qemu_fopen_ops(s
, NULL
, block_get_buffer
, bdrv_fclose
, NULL
, NULL
);
382 QEMUFile
*qemu_fopen_ops(void *opaque
, QEMUFilePutBufferFunc
*put_buffer
,
383 QEMUFileGetBufferFunc
*get_buffer
,
384 QEMUFileCloseFunc
*close
,
385 QEMUFileRateLimit
*rate_limit
,
386 QEMUFileSetRateLimit
*set_rate_limit
)
390 f
= qemu_mallocz(sizeof(QEMUFile
));
393 f
->put_buffer
= put_buffer
;
394 f
->get_buffer
= get_buffer
;
396 f
->rate_limit
= rate_limit
;
397 f
->set_rate_limit
= set_rate_limit
;
403 int qemu_file_has_error(QEMUFile
*f
)
408 void qemu_file_set_error(QEMUFile
*f
)
413 void qemu_fflush(QEMUFile
*f
)
418 if (f
->is_write
&& f
->buf_index
> 0) {
421 len
= f
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
423 f
->buf_offset
+= f
->buf_index
;
430 static void qemu_fill_buffer(QEMUFile
*f
)
440 len
= f
->get_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, IO_BUF_SIZE
);
444 f
->buf_offset
+= len
;
445 } else if (len
!= -EAGAIN
)
449 int qemu_fclose(QEMUFile
*f
)
454 ret
= f
->close(f
->opaque
);
459 void qemu_file_put_notify(QEMUFile
*f
)
461 f
->put_buffer(f
->opaque
, NULL
, 0, 0);
464 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
468 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
470 "Attempted to write to buffer while read buffer is not empty\n");
474 while (!f
->has_error
&& size
> 0) {
475 l
= IO_BUF_SIZE
- f
->buf_index
;
478 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
483 if (f
->buf_index
>= IO_BUF_SIZE
)
488 void qemu_put_byte(QEMUFile
*f
, int v
)
490 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
492 "Attempted to write to buffer while read buffer is not empty\n");
496 f
->buf
[f
->buf_index
++] = v
;
498 if (f
->buf_index
>= IO_BUF_SIZE
)
502 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size1
)
511 l
= f
->buf_size
- f
->buf_index
;
514 l
= f
->buf_size
- f
->buf_index
;
520 memcpy(buf
, f
->buf
+ f
->buf_index
, l
);
528 int qemu_get_byte(QEMUFile
*f
)
533 if (f
->buf_index
>= f
->buf_size
) {
535 if (f
->buf_index
>= f
->buf_size
)
538 return f
->buf
[f
->buf_index
++];
541 int64_t qemu_ftell(QEMUFile
*f
)
543 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
546 int64_t qemu_fseek(QEMUFile
*f
, int64_t pos
, int whence
)
548 if (whence
== SEEK_SET
) {
550 } else if (whence
== SEEK_CUR
) {
551 pos
+= qemu_ftell(f
);
553 /* SEEK_END not supported */
567 int qemu_file_rate_limit(QEMUFile
*f
)
570 return f
->rate_limit(f
->opaque
);
575 size_t qemu_file_set_rate_limit(QEMUFile
*f
, size_t new_rate
)
577 if (f
->set_rate_limit
)
578 return f
->set_rate_limit(f
->opaque
, new_rate
);
583 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
585 qemu_put_byte(f
, v
>> 8);
589 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
591 qemu_put_byte(f
, v
>> 24);
592 qemu_put_byte(f
, v
>> 16);
593 qemu_put_byte(f
, v
>> 8);
597 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
599 qemu_put_be32(f
, v
>> 32);
603 unsigned int qemu_get_be16(QEMUFile
*f
)
606 v
= qemu_get_byte(f
) << 8;
607 v
|= qemu_get_byte(f
);
611 unsigned int qemu_get_be32(QEMUFile
*f
)
614 v
= qemu_get_byte(f
) << 24;
615 v
|= qemu_get_byte(f
) << 16;
616 v
|= qemu_get_byte(f
) << 8;
617 v
|= qemu_get_byte(f
);
621 uint64_t qemu_get_be64(QEMUFile
*f
)
624 v
= (uint64_t)qemu_get_be32(f
) << 32;
625 v
|= qemu_get_be32(f
);
629 typedef struct SaveStateEntry
{
634 SaveLiveStateHandler
*save_live_state
;
635 SaveStateHandler
*save_state
;
636 LoadStateHandler
*load_state
;
638 struct SaveStateEntry
*next
;
641 static SaveStateEntry
*first_se
;
643 /* TODO: Individual devices generally have very little idea about the rest
644 of the system, so instance_id should be removed/replaced.
645 Meanwhile pass -1 as instance_id if you do not already have a clearly
646 distinguishing id for all instances of your device class. */
647 int register_savevm_live(const char *idstr
,
650 SaveLiveStateHandler
*save_live_state
,
651 SaveStateHandler
*save_state
,
652 LoadStateHandler
*load_state
,
655 SaveStateEntry
*se
, **pse
;
656 static int global_section_id
;
658 se
= qemu_malloc(sizeof(SaveStateEntry
));
659 pstrcpy(se
->idstr
, sizeof(se
->idstr
), idstr
);
660 se
->instance_id
= (instance_id
== -1) ? 0 : instance_id
;
661 se
->version_id
= version_id
;
662 se
->section_id
= global_section_id
++;
663 se
->save_live_state
= save_live_state
;
664 se
->save_state
= save_state
;
665 se
->load_state
= load_state
;
669 /* add at the end of list */
671 while (*pse
!= NULL
) {
672 if (instance_id
== -1
673 && strcmp(se
->idstr
, (*pse
)->idstr
) == 0
674 && se
->instance_id
<= (*pse
)->instance_id
)
675 se
->instance_id
= (*pse
)->instance_id
+ 1;
682 int register_savevm(const char *idstr
,
685 SaveStateHandler
*save_state
,
686 LoadStateHandler
*load_state
,
689 return register_savevm_live(idstr
, instance_id
, version_id
,
690 NULL
, save_state
, load_state
, opaque
);
693 void unregister_savevm(const char *idstr
, void *opaque
)
695 SaveStateEntry
**pse
;
698 while (*pse
!= NULL
) {
699 if (strcmp((*pse
)->idstr
, idstr
) == 0 && (*pse
)->opaque
== opaque
) {
700 SaveStateEntry
*next
= (*pse
)->next
;
709 #define QEMU_VM_FILE_MAGIC 0x5145564d
710 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
711 #define QEMU_VM_FILE_VERSION 0x00000003
713 #define QEMU_VM_EOF 0x00
714 #define QEMU_VM_SECTION_START 0x01
715 #define QEMU_VM_SECTION_PART 0x02
716 #define QEMU_VM_SECTION_END 0x03
717 #define QEMU_VM_SECTION_FULL 0x04
719 int qemu_savevm_state_begin(QEMUFile
*f
)
723 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
724 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
726 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
729 if (se
->save_live_state
== NULL
)
733 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
734 qemu_put_be32(f
, se
->section_id
);
737 len
= strlen(se
->idstr
);
738 qemu_put_byte(f
, len
);
739 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
741 qemu_put_be32(f
, se
->instance_id
);
742 qemu_put_be32(f
, se
->version_id
);
744 se
->save_live_state(f
, QEMU_VM_SECTION_START
, se
->opaque
);
747 if (qemu_file_has_error(f
))
753 int qemu_savevm_state_iterate(QEMUFile
*f
)
758 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
759 if (se
->save_live_state
== NULL
)
763 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
764 qemu_put_be32(f
, se
->section_id
);
766 ret
&= !!se
->save_live_state(f
, QEMU_VM_SECTION_PART
, se
->opaque
);
772 if (qemu_file_has_error(f
))
778 int qemu_savevm_state_complete(QEMUFile
*f
)
782 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
783 if (se
->save_live_state
== NULL
)
787 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
788 qemu_put_be32(f
, se
->section_id
);
790 se
->save_live_state(f
, QEMU_VM_SECTION_END
, se
->opaque
);
793 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
796 if (se
->save_state
== NULL
)
800 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
801 qemu_put_be32(f
, se
->section_id
);
804 len
= strlen(se
->idstr
);
805 qemu_put_byte(f
, len
);
806 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
808 qemu_put_be32(f
, se
->instance_id
);
809 qemu_put_be32(f
, se
->version_id
);
811 se
->save_state(f
, se
->opaque
);
814 qemu_put_byte(f
, QEMU_VM_EOF
);
816 if (qemu_file_has_error(f
))
822 int qemu_savevm_state(QEMUFile
*f
)
824 int saved_vm_running
;
827 saved_vm_running
= vm_running
;
832 ret
= qemu_savevm_state_begin(f
);
837 ret
= qemu_savevm_state_iterate(f
);
842 ret
= qemu_savevm_state_complete(f
);
845 if (qemu_file_has_error(f
))
848 if (!ret
&& saved_vm_running
)
854 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
858 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
859 if (!strcmp(se
->idstr
, idstr
) &&
860 instance_id
== se
->instance_id
)
866 typedef struct LoadStateEntry
{
870 struct LoadStateEntry
*next
;
873 static int qemu_loadvm_state_v2(QEMUFile
*f
)
876 int len
, ret
, instance_id
, record_len
, version_id
;
877 int64_t total_len
, end_pos
, cur_pos
;
880 total_len
= qemu_get_be64(f
);
881 end_pos
= total_len
+ qemu_ftell(f
);
883 if (qemu_ftell(f
) >= end_pos
)
885 len
= qemu_get_byte(f
);
886 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
888 instance_id
= qemu_get_be32(f
);
889 version_id
= qemu_get_be32(f
);
890 record_len
= qemu_get_be32(f
);
891 cur_pos
= qemu_ftell(f
);
892 se
= find_se(idstr
, instance_id
);
894 fprintf(stderr
, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
897 ret
= se
->load_state(f
, se
->opaque
, version_id
);
899 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
904 /* always seek to exact end of record */
905 qemu_fseek(f
, cur_pos
+ record_len
, SEEK_SET
);
908 if (qemu_file_has_error(f
))
914 int qemu_loadvm_state(QEMUFile
*f
)
916 LoadStateEntry
*first_le
= NULL
;
917 uint8_t section_type
;
921 v
= qemu_get_be32(f
);
922 if (v
!= QEMU_VM_FILE_MAGIC
)
925 v
= qemu_get_be32(f
);
926 if (v
== QEMU_VM_FILE_VERSION_COMPAT
)
927 return qemu_loadvm_state_v2(f
);
928 if (v
!= QEMU_VM_FILE_VERSION
)
931 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
932 uint32_t instance_id
, version_id
, section_id
;
938 switch (section_type
) {
939 case QEMU_VM_SECTION_START
:
940 case QEMU_VM_SECTION_FULL
:
941 /* Read section start */
942 section_id
= qemu_get_be32(f
);
943 len
= qemu_get_byte(f
);
944 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
946 instance_id
= qemu_get_be32(f
);
947 version_id
= qemu_get_be32(f
);
949 /* Find savevm section */
950 se
= find_se(idstr
, instance_id
);
952 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
957 /* Validate version */
958 if (version_id
> se
->version_id
) {
959 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
960 version_id
, idstr
, se
->version_id
);
966 le
= qemu_mallocz(sizeof(*le
));
969 le
->section_id
= section_id
;
970 le
->version_id
= version_id
;
974 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
976 case QEMU_VM_SECTION_PART
:
977 case QEMU_VM_SECTION_END
:
978 section_id
= qemu_get_be32(f
);
980 for (le
= first_le
; le
&& le
->section_id
!= section_id
; le
= le
->next
);
982 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
987 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
990 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
1000 LoadStateEntry
*le
= first_le
;
1001 first_le
= first_le
->next
;
1005 if (qemu_file_has_error(f
))
1011 /* device can contain snapshots */
1012 static int bdrv_can_snapshot(BlockDriverState
*bs
)
1015 !bdrv_is_removable(bs
) &&
1016 !bdrv_is_read_only(bs
));
1019 /* device must be snapshots in order to have a reliable snapshot */
1020 static int bdrv_has_snapshot(BlockDriverState
*bs
)
1023 !bdrv_is_removable(bs
) &&
1024 !bdrv_is_read_only(bs
));
1027 static BlockDriverState
*get_bs_snapshots(void)
1029 BlockDriverState
*bs
;
1033 return bs_snapshots
;
1034 for(i
= 0; i
<= nb_drives
; i
++) {
1035 bs
= drives_table
[i
].bdrv
;
1036 if (bdrv_can_snapshot(bs
))
1045 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
1048 QEMUSnapshotInfo
*sn_tab
, *sn
;
1052 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1055 for(i
= 0; i
< nb_sns
; i
++) {
1057 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
1067 void do_savevm(Monitor
*mon
, const char *name
)
1069 BlockDriverState
*bs
, *bs1
;
1070 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
1071 int must_delete
, ret
, i
;
1072 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1074 int saved_vm_running
;
1075 uint32_t vm_state_size
;
1082 bs
= get_bs_snapshots();
1084 monitor_printf(mon
, "No block device can accept snapshots\n");
1088 /* ??? Should this occur after vm_stop? */
1091 saved_vm_running
= vm_running
;
1096 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
1101 memset(sn
, 0, sizeof(*sn
));
1103 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
1104 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
1107 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1110 /* fill auxiliary fields */
1113 sn
->date_sec
= tb
.time
;
1114 sn
->date_nsec
= tb
.millitm
* 1000000;
1116 gettimeofday(&tv
, NULL
);
1117 sn
->date_sec
= tv
.tv_sec
;
1118 sn
->date_nsec
= tv
.tv_usec
* 1000;
1120 sn
->vm_clock_nsec
= qemu_get_clock(vm_clock
);
1122 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1123 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1124 bdrv_get_device_name(bs
));
1128 /* save the VM state */
1129 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 1);
1131 monitor_printf(mon
, "Could not open VM state file\n");
1134 ret
= qemu_savevm_state(f
);
1135 vm_state_size
= qemu_ftell(f
);
1138 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
1142 /* create the snapshots */
1144 for(i
= 0; i
< nb_drives
; i
++) {
1145 bs1
= drives_table
[i
].bdrv
;
1146 if (bdrv_has_snapshot(bs1
)) {
1148 ret
= bdrv_snapshot_delete(bs1
, old_sn
->id_str
);
1151 "Error while deleting snapshot on '%s'\n",
1152 bdrv_get_device_name(bs1
));
1155 /* Write VM state size only to the image that contains the state */
1156 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
1157 ret
= bdrv_snapshot_create(bs1
, sn
);
1159 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
1160 bdrv_get_device_name(bs1
));
1166 if (saved_vm_running
)
1170 void do_loadvm(Monitor
*mon
, const char *name
)
1172 BlockDriverState
*bs
, *bs1
;
1173 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1174 QEMUSnapshotInfo sn
;
1177 int saved_vm_running
;
1179 bs
= get_bs_snapshots();
1181 monitor_printf(mon
, "No block device supports snapshots\n");
1185 /* Flush all IO requests so they don't interfere with the new state. */
1188 saved_vm_running
= vm_running
;
1191 for(i
= 0; i
<= nb_drives
; i
++) {
1192 bs1
= drives_table
[i
].bdrv
;
1193 if (bdrv_has_snapshot(bs1
)) {
1194 ret
= bdrv_snapshot_goto(bs1
, name
);
1197 monitor_printf(mon
, "Warning: ");
1201 "Snapshots not supported on device '%s'\n",
1202 bdrv_get_device_name(bs1
));
1205 monitor_printf(mon
, "Could not find snapshot '%s' on "
1207 name
, bdrv_get_device_name(bs1
));
1210 monitor_printf(mon
, "Error %d while activating snapshot on"
1211 " '%s'\n", ret
, bdrv_get_device_name(bs1
));
1214 /* fatal on snapshot block device */
1221 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1222 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1223 bdrv_get_device_name(bs
));
1227 /* Don't even try to load empty VM states */
1228 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
1229 if ((ret
>= 0) && (sn
.vm_state_size
== 0))
1232 /* restore the VM state */
1233 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 0);
1235 monitor_printf(mon
, "Could not open VM state file\n");
1238 ret
= qemu_loadvm_state(f
);
1241 monitor_printf(mon
, "Error %d while loading VM state\n", ret
);
1244 if (saved_vm_running
)
1248 void do_delvm(Monitor
*mon
, const char *name
)
1250 BlockDriverState
*bs
, *bs1
;
1253 bs
= get_bs_snapshots();
1255 monitor_printf(mon
, "No block device supports snapshots\n");
1259 for(i
= 0; i
<= nb_drives
; i
++) {
1260 bs1
= drives_table
[i
].bdrv
;
1261 if (bdrv_has_snapshot(bs1
)) {
1262 ret
= bdrv_snapshot_delete(bs1
, name
);
1264 if (ret
== -ENOTSUP
)
1266 "Snapshots not supported on device '%s'\n",
1267 bdrv_get_device_name(bs1
));
1269 monitor_printf(mon
, "Error %d while deleting snapshot on "
1270 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
1276 void do_info_snapshots(Monitor
*mon
)
1278 BlockDriverState
*bs
, *bs1
;
1279 QEMUSnapshotInfo
*sn_tab
, *sn
;
1283 bs
= get_bs_snapshots();
1285 monitor_printf(mon
, "No available block device supports snapshots\n");
1288 monitor_printf(mon
, "Snapshot devices:");
1289 for(i
= 0; i
<= nb_drives
; i
++) {
1290 bs1
= drives_table
[i
].bdrv
;
1291 if (bdrv_has_snapshot(bs1
)) {
1293 monitor_printf(mon
, " %s", bdrv_get_device_name(bs1
));
1296 monitor_printf(mon
, "\n");
1298 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1300 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
1303 monitor_printf(mon
, "Snapshot list (from %s):\n",
1304 bdrv_get_device_name(bs
));
1305 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
1306 for(i
= 0; i
< nb_sns
; i
++) {
1308 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));