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 _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>
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.h>
68 #include <linux/rtc.h>
75 #include <sys/timeb.h>
77 #define getopt_long_only getopt_long
78 #define memalign(align, size) malloc(size)
81 #include "qemu-common.h"
86 #include "qemu-timer.h"
87 #include "qemu-char.h"
89 #include "audio/audio.h"
90 #include "migration.h"
91 #include "qemu_socket.h"
93 /* point to the block driver where the snapshots are managed */
94 static BlockDriverState
*bs_snapshots
;
96 #define SELF_ANNOUNCE_ROUNDS 5
97 #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
98 //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
99 #define EXPERIMENTAL_MAGIC 0xf1f23f4f
101 static int announce_self_create(uint8_t *buf
,
104 uint32_t magic
= EXPERIMENTAL_MAGIC
;
105 uint16_t proto
= htons(ETH_P_EXPERIMENTAL
);
107 /* FIXME: should we send a different packet (arp/rarp/ping)? */
109 memset(buf
, 0xff, 6); /* h_dst */
110 memcpy(buf
+ 6, mac_addr
, 6); /* h_src */
111 memcpy(buf
+ 12, &proto
, 2); /* h_proto */
112 memcpy(buf
+ 14, &magic
, 4); /* magic */
117 void qemu_announce_self(void)
124 for (i
= 0; i
< nb_nics
; i
++) {
125 len
= announce_self_create(buf
, nd_table
[i
].macaddr
);
126 vlan
= nd_table
[i
].vlan
;
127 for(vc
= vlan
->first_client
; vc
!= NULL
; vc
= vc
->next
) {
128 for (j
=0; j
< SELF_ANNOUNCE_ROUNDS
; j
++)
129 vc
->fd_read(vc
->opaque
, buf
, len
);
134 /***********************************************************/
135 /* savevm/loadvm support */
137 #define IO_BUF_SIZE 32768
140 QEMUFilePutBufferFunc
*put_buffer
;
141 QEMUFileGetBufferFunc
*get_buffer
;
142 QEMUFileCloseFunc
*close
;
143 QEMUFileRateLimit
*rate_limit
;
147 int64_t buf_offset
; /* start of buffer when writing, end of buffer
150 int buf_size
; /* 0 when writing */
151 uint8_t buf
[IO_BUF_SIZE
];
156 typedef struct QEMUFilePopen
162 typedef struct QEMUFileSocket
168 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
170 QEMUFileSocket
*s
= opaque
;
174 len
= recv(s
->fd
, buf
, size
, 0);
175 } while (len
== -1 && socket_error() == EINTR
);
178 len
= -socket_error();
183 static int socket_close(void *opaque
)
185 QEMUFileSocket
*s
= opaque
;
190 static int popen_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
192 QEMUFilePopen
*s
= opaque
;
193 return fwrite(buf
, 1, size
, s
->popen_file
);
196 static int popen_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
198 QEMUFilePopen
*s
= opaque
;
199 return fread(buf
, 1, size
, s
->popen_file
);
202 static int popen_close(void *opaque
)
204 QEMUFilePopen
*s
= opaque
;
205 pclose(s
->popen_file
);
210 QEMUFile
*qemu_popen(FILE *popen_file
, const char *mode
)
214 if (popen_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
215 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
219 s
= qemu_mallocz(sizeof(QEMUFilePopen
));
221 s
->popen_file
= popen_file
;
224 s
->file
= qemu_fopen_ops(s
, NULL
, popen_get_buffer
, popen_close
, NULL
);
226 s
->file
= qemu_fopen_ops(s
, popen_put_buffer
, NULL
, popen_close
, NULL
);
228 fprintf(stderr
, "qemu_popen: returning result of qemu_fopen_ops\n");
232 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
236 popen_file
= popen(command
, mode
);
237 if(popen_file
== NULL
) {
241 return qemu_popen(popen_file
, mode
);
244 QEMUFile
*qemu_fopen_socket(int fd
)
246 QEMUFileSocket
*s
= qemu_mallocz(sizeof(QEMUFileSocket
));
249 s
->file
= qemu_fopen_ops(s
, NULL
, socket_get_buffer
, socket_close
, NULL
);
253 typedef struct QEMUFileStdio
258 static int file_put_buffer(void *opaque
, const uint8_t *buf
,
259 int64_t pos
, int size
)
261 QEMUFileStdio
*s
= opaque
;
262 fseek(s
->outfile
, pos
, SEEK_SET
);
263 fwrite(buf
, 1, size
, s
->outfile
);
267 static int file_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
269 QEMUFileStdio
*s
= opaque
;
270 fseek(s
->outfile
, pos
, SEEK_SET
);
271 return fread(buf
, 1, size
, s
->outfile
);
274 static int file_close(void *opaque
)
276 QEMUFileStdio
*s
= opaque
;
282 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
286 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
288 s
->outfile
= fopen(filename
, mode
);
292 if (!strcmp(mode
, "wb"))
293 return qemu_fopen_ops(s
, file_put_buffer
, NULL
, file_close
, NULL
);
294 else if (!strcmp(mode
, "rb"))
295 return qemu_fopen_ops(s
, NULL
, file_get_buffer
, file_close
, NULL
);
304 typedef struct QEMUFileBdrv
306 BlockDriverState
*bs
;
310 static int bdrv_put_buffer(void *opaque
, const uint8_t *buf
,
311 int64_t pos
, int size
)
313 QEMUFileBdrv
*s
= opaque
;
314 bdrv_pwrite(s
->bs
, s
->base_offset
+ pos
, buf
, size
);
318 static int bdrv_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
320 QEMUFileBdrv
*s
= opaque
;
321 return bdrv_pread(s
->bs
, s
->base_offset
+ pos
, buf
, size
);
324 static int bdrv_fclose(void *opaque
)
326 QEMUFileBdrv
*s
= opaque
;
331 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int64_t offset
, int is_writable
)
335 s
= qemu_mallocz(sizeof(QEMUFileBdrv
));
338 s
->base_offset
= offset
;
341 return qemu_fopen_ops(s
, bdrv_put_buffer
, NULL
, bdrv_fclose
, NULL
);
343 return qemu_fopen_ops(s
, NULL
, bdrv_get_buffer
, bdrv_fclose
, NULL
);
346 QEMUFile
*qemu_fopen_ops(void *opaque
, QEMUFilePutBufferFunc
*put_buffer
,
347 QEMUFileGetBufferFunc
*get_buffer
,
348 QEMUFileCloseFunc
*close
,
349 QEMUFileRateLimit
*rate_limit
)
353 f
= qemu_mallocz(sizeof(QEMUFile
));
356 f
->put_buffer
= put_buffer
;
357 f
->get_buffer
= get_buffer
;
359 f
->rate_limit
= rate_limit
;
365 int qemu_file_has_error(QEMUFile
*f
)
370 void qemu_fflush(QEMUFile
*f
)
375 if (f
->is_write
&& f
->buf_index
> 0) {
378 len
= f
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
380 f
->buf_offset
+= f
->buf_index
;
387 static void qemu_fill_buffer(QEMUFile
*f
)
397 len
= f
->get_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, IO_BUF_SIZE
);
401 f
->buf_offset
+= len
;
402 } else if (len
!= -EAGAIN
)
406 int qemu_fclose(QEMUFile
*f
)
411 ret
= f
->close(f
->opaque
);
416 void qemu_file_put_notify(QEMUFile
*f
)
418 f
->put_buffer(f
->opaque
, NULL
, 0, 0);
421 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
425 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
427 "Attempted to write to buffer while read buffer is not empty\n");
431 while (!f
->has_error
&& size
> 0) {
432 l
= IO_BUF_SIZE
- f
->buf_index
;
435 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
440 if (f
->buf_index
>= IO_BUF_SIZE
)
445 void qemu_put_byte(QEMUFile
*f
, int v
)
447 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
449 "Attempted to write to buffer while read buffer is not empty\n");
453 f
->buf
[f
->buf_index
++] = v
;
455 if (f
->buf_index
>= IO_BUF_SIZE
)
459 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size1
)
468 l
= f
->buf_size
- f
->buf_index
;
471 l
= f
->buf_size
- f
->buf_index
;
477 memcpy(buf
, f
->buf
+ f
->buf_index
, l
);
485 int qemu_get_byte(QEMUFile
*f
)
490 if (f
->buf_index
>= f
->buf_size
) {
492 if (f
->buf_index
>= f
->buf_size
)
495 return f
->buf
[f
->buf_index
++];
498 int64_t qemu_ftell(QEMUFile
*f
)
500 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
503 int64_t qemu_fseek(QEMUFile
*f
, int64_t pos
, int whence
)
505 if (whence
== SEEK_SET
) {
507 } else if (whence
== SEEK_CUR
) {
508 pos
+= qemu_ftell(f
);
510 /* SEEK_END not supported */
524 int qemu_file_rate_limit(QEMUFile
*f
)
527 return f
->rate_limit(f
->opaque
);
532 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
534 qemu_put_byte(f
, v
>> 8);
538 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
540 qemu_put_byte(f
, v
>> 24);
541 qemu_put_byte(f
, v
>> 16);
542 qemu_put_byte(f
, v
>> 8);
546 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
548 qemu_put_be32(f
, v
>> 32);
552 unsigned int qemu_get_be16(QEMUFile
*f
)
555 v
= qemu_get_byte(f
) << 8;
556 v
|= qemu_get_byte(f
);
560 unsigned int qemu_get_be32(QEMUFile
*f
)
563 v
= qemu_get_byte(f
) << 24;
564 v
|= qemu_get_byte(f
) << 16;
565 v
|= qemu_get_byte(f
) << 8;
566 v
|= qemu_get_byte(f
);
570 uint64_t qemu_get_be64(QEMUFile
*f
)
573 v
= (uint64_t)qemu_get_be32(f
) << 32;
574 v
|= qemu_get_be32(f
);
578 typedef struct SaveStateEntry
{
583 SaveLiveStateHandler
*save_live_state
;
584 SaveStateHandler
*save_state
;
585 LoadStateHandler
*load_state
;
587 struct SaveStateEntry
*next
;
590 static SaveStateEntry
*first_se
;
592 /* TODO: Individual devices generally have very little idea about the rest
593 of the system, so instance_id should be removed/replaced.
594 Meanwhile pass -1 as instance_id if you do not already have a clearly
595 distinguishing id for all instances of your device class. */
596 int register_savevm_live(const char *idstr
,
599 SaveLiveStateHandler
*save_live_state
,
600 SaveStateHandler
*save_state
,
601 LoadStateHandler
*load_state
,
604 SaveStateEntry
*se
, **pse
;
605 static int global_section_id
;
607 se
= qemu_malloc(sizeof(SaveStateEntry
));
608 pstrcpy(se
->idstr
, sizeof(se
->idstr
), idstr
);
609 se
->instance_id
= (instance_id
== -1) ? 0 : instance_id
;
610 se
->version_id
= version_id
;
611 se
->section_id
= global_section_id
++;
612 se
->save_live_state
= save_live_state
;
613 se
->save_state
= save_state
;
614 se
->load_state
= load_state
;
618 /* add at the end of list */
620 while (*pse
!= NULL
) {
621 if (instance_id
== -1
622 && strcmp(se
->idstr
, (*pse
)->idstr
) == 0
623 && se
->instance_id
<= (*pse
)->instance_id
)
624 se
->instance_id
= (*pse
)->instance_id
+ 1;
631 int register_savevm(const char *idstr
,
634 SaveStateHandler
*save_state
,
635 LoadStateHandler
*load_state
,
638 return register_savevm_live(idstr
, instance_id
, version_id
,
639 NULL
, save_state
, load_state
, opaque
);
642 #define QEMU_VM_FILE_MAGIC 0x5145564d
643 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
644 #define QEMU_VM_FILE_VERSION 0x00000003
646 #define QEMU_VM_EOF 0x00
647 #define QEMU_VM_SECTION_START 0x01
648 #define QEMU_VM_SECTION_PART 0x02
649 #define QEMU_VM_SECTION_END 0x03
650 #define QEMU_VM_SECTION_FULL 0x04
652 int qemu_savevm_state_begin(QEMUFile
*f
)
656 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
657 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
659 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
662 if (se
->save_live_state
== NULL
)
666 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
667 qemu_put_be32(f
, se
->section_id
);
670 len
= strlen(se
->idstr
);
671 qemu_put_byte(f
, len
);
672 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
674 qemu_put_be32(f
, se
->instance_id
);
675 qemu_put_be32(f
, se
->version_id
);
677 se
->save_live_state(f
, QEMU_VM_SECTION_START
, se
->opaque
);
680 if (qemu_file_has_error(f
))
686 int qemu_savevm_state_iterate(QEMUFile
*f
)
691 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
692 if (se
->save_live_state
== NULL
)
696 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
697 qemu_put_be32(f
, se
->section_id
);
699 ret
&= !!se
->save_live_state(f
, QEMU_VM_SECTION_PART
, se
->opaque
);
705 if (qemu_file_has_error(f
))
711 int qemu_savevm_state_complete(QEMUFile
*f
)
715 for (se
= first_se
; se
!= NULL
; se
= se
->next
) {
716 if (se
->save_live_state
== NULL
)
720 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
721 qemu_put_be32(f
, se
->section_id
);
723 se
->save_live_state(f
, QEMU_VM_SECTION_END
, se
->opaque
);
726 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
729 if (se
->save_state
== NULL
)
733 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
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_state(f
, se
->opaque
);
747 qemu_put_byte(f
, QEMU_VM_EOF
);
749 if (qemu_file_has_error(f
))
755 int qemu_savevm_state(QEMUFile
*f
)
757 int saved_vm_running
;
760 saved_vm_running
= vm_running
;
765 ret
= qemu_savevm_state_begin(f
);
770 ret
= qemu_savevm_state_iterate(f
);
775 ret
= qemu_savevm_state_complete(f
);
778 if (qemu_file_has_error(f
))
781 if (!ret
&& saved_vm_running
)
787 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
791 for(se
= first_se
; se
!= NULL
; se
= se
->next
) {
792 if (!strcmp(se
->idstr
, idstr
) &&
793 instance_id
== se
->instance_id
)
799 typedef struct LoadStateEntry
{
803 struct LoadStateEntry
*next
;
806 static int qemu_loadvm_state_v2(QEMUFile
*f
)
809 int len
, ret
, instance_id
, record_len
, version_id
;
810 int64_t total_len
, end_pos
, cur_pos
;
813 total_len
= qemu_get_be64(f
);
814 end_pos
= total_len
+ qemu_ftell(f
);
816 if (qemu_ftell(f
) >= end_pos
)
818 len
= qemu_get_byte(f
);
819 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
821 instance_id
= qemu_get_be32(f
);
822 version_id
= qemu_get_be32(f
);
823 record_len
= qemu_get_be32(f
);
824 cur_pos
= qemu_ftell(f
);
825 se
= find_se(idstr
, instance_id
);
827 fprintf(stderr
, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
830 ret
= se
->load_state(f
, se
->opaque
, version_id
);
832 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
836 /* always seek to exact end of record */
837 qemu_fseek(f
, cur_pos
+ record_len
, SEEK_SET
);
840 if (qemu_file_has_error(f
))
846 int qemu_loadvm_state(QEMUFile
*f
)
848 LoadStateEntry
*first_le
= NULL
;
849 uint8_t section_type
;
853 v
= qemu_get_be32(f
);
854 if (v
!= QEMU_VM_FILE_MAGIC
)
857 v
= qemu_get_be32(f
);
858 if (v
== QEMU_VM_FILE_VERSION_COMPAT
)
859 return qemu_loadvm_state_v2(f
);
860 if (v
!= QEMU_VM_FILE_VERSION
)
863 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
864 uint32_t instance_id
, version_id
, section_id
;
870 switch (section_type
) {
871 case QEMU_VM_SECTION_START
:
872 case QEMU_VM_SECTION_FULL
:
873 /* Read section start */
874 section_id
= qemu_get_be32(f
);
875 len
= qemu_get_byte(f
);
876 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
878 instance_id
= qemu_get_be32(f
);
879 version_id
= qemu_get_be32(f
);
881 /* Find savevm section */
882 se
= find_se(idstr
, instance_id
);
884 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
889 /* Validate version */
890 if (version_id
> se
->version_id
) {
891 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
892 version_id
, idstr
, se
->version_id
);
898 le
= qemu_mallocz(sizeof(*le
));
901 le
->section_id
= section_id
;
902 le
->version_id
= version_id
;
906 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
908 case QEMU_VM_SECTION_PART
:
909 case QEMU_VM_SECTION_END
:
910 section_id
= qemu_get_be32(f
);
912 for (le
= first_le
; le
&& le
->section_id
!= section_id
; le
= le
->next
);
914 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
919 le
->se
->load_state(f
, le
->se
->opaque
, le
->version_id
);
922 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
932 LoadStateEntry
*le
= first_le
;
933 first_le
= first_le
->next
;
937 if (qemu_file_has_error(f
))
943 /* device can contain snapshots */
944 static int bdrv_can_snapshot(BlockDriverState
*bs
)
947 !bdrv_is_removable(bs
) &&
948 !bdrv_is_read_only(bs
));
951 /* device must be snapshots in order to have a reliable snapshot */
952 static int bdrv_has_snapshot(BlockDriverState
*bs
)
955 !bdrv_is_removable(bs
) &&
956 !bdrv_is_read_only(bs
));
959 static BlockDriverState
*get_bs_snapshots(void)
961 BlockDriverState
*bs
;
966 for(i
= 0; i
<= nb_drives
; i
++) {
967 bs
= drives_table
[i
].bdrv
;
968 if (bdrv_can_snapshot(bs
))
977 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
980 QEMUSnapshotInfo
*sn_tab
, *sn
;
984 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
987 for(i
= 0; i
< nb_sns
; i
++) {
989 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
999 void do_savevm(Monitor
*mon
, const char *name
)
1001 BlockDriverState
*bs
, *bs1
;
1002 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
1003 int must_delete
, ret
, i
;
1004 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1006 int saved_vm_running
;
1007 uint32_t vm_state_size
;
1014 bs
= get_bs_snapshots();
1016 monitor_printf(mon
, "No block device can accept snapshots\n");
1020 /* ??? Should this occur after vm_stop? */
1023 saved_vm_running
= vm_running
;
1028 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
1033 memset(sn
, 0, sizeof(*sn
));
1035 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
1036 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
1039 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1042 /* fill auxiliary fields */
1045 sn
->date_sec
= tb
.time
;
1046 sn
->date_nsec
= tb
.millitm
* 1000000;
1048 gettimeofday(&tv
, NULL
);
1049 sn
->date_sec
= tv
.tv_sec
;
1050 sn
->date_nsec
= tv
.tv_usec
* 1000;
1052 sn
->vm_clock_nsec
= qemu_get_clock(vm_clock
);
1054 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1055 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1056 bdrv_get_device_name(bs
));
1060 /* save the VM state */
1061 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 1);
1063 monitor_printf(mon
, "Could not open VM state file\n");
1066 ret
= qemu_savevm_state(f
);
1067 vm_state_size
= qemu_ftell(f
);
1070 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
1074 /* create the snapshots */
1076 for(i
= 0; i
< nb_drives
; i
++) {
1077 bs1
= drives_table
[i
].bdrv
;
1078 if (bdrv_has_snapshot(bs1
)) {
1080 ret
= bdrv_snapshot_delete(bs1
, old_sn
->id_str
);
1083 "Error while deleting snapshot on '%s'\n",
1084 bdrv_get_device_name(bs1
));
1087 /* Write VM state size only to the image that contains the state */
1088 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
1089 ret
= bdrv_snapshot_create(bs1
, sn
);
1091 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
1092 bdrv_get_device_name(bs1
));
1098 if (saved_vm_running
)
1102 void do_loadvm(Monitor
*mon
, const char *name
)
1104 BlockDriverState
*bs
, *bs1
;
1105 BlockDriverInfo bdi1
, *bdi
= &bdi1
;
1106 QEMUSnapshotInfo sn
;
1109 int saved_vm_running
;
1111 bs
= get_bs_snapshots();
1113 monitor_printf(mon
, "No block device supports snapshots\n");
1117 /* Flush all IO requests so they don't interfere with the new state. */
1120 saved_vm_running
= vm_running
;
1123 for(i
= 0; i
<= nb_drives
; i
++) {
1124 bs1
= drives_table
[i
].bdrv
;
1125 if (bdrv_has_snapshot(bs1
)) {
1126 ret
= bdrv_snapshot_goto(bs1
, name
);
1129 monitor_printf(mon
, "Warning: ");
1133 "Snapshots not supported on device '%s'\n",
1134 bdrv_get_device_name(bs1
));
1137 monitor_printf(mon
, "Could not find snapshot '%s' on "
1139 name
, bdrv_get_device_name(bs1
));
1142 monitor_printf(mon
, "Error %d while activating snapshot on"
1143 " '%s'\n", ret
, bdrv_get_device_name(bs1
));
1146 /* fatal on snapshot block device */
1153 if (bdrv_get_info(bs
, bdi
) < 0 || bdi
->vm_state_offset
<= 0) {
1154 monitor_printf(mon
, "Device %s does not support VM state snapshots\n",
1155 bdrv_get_device_name(bs
));
1159 /* Don't even try to load empty VM states */
1160 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
1161 if ((ret
>= 0) && (sn
.vm_state_size
== 0))
1164 /* restore the VM state */
1165 f
= qemu_fopen_bdrv(bs
, bdi
->vm_state_offset
, 0);
1167 monitor_printf(mon
, "Could not open VM state file\n");
1170 ret
= qemu_loadvm_state(f
);
1173 monitor_printf(mon
, "Error %d while loading VM state\n", ret
);
1176 if (saved_vm_running
)
1180 void do_delvm(Monitor
*mon
, const char *name
)
1182 BlockDriverState
*bs
, *bs1
;
1185 bs
= get_bs_snapshots();
1187 monitor_printf(mon
, "No block device supports snapshots\n");
1191 for(i
= 0; i
<= nb_drives
; i
++) {
1192 bs1
= drives_table
[i
].bdrv
;
1193 if (bdrv_has_snapshot(bs1
)) {
1194 ret
= bdrv_snapshot_delete(bs1
, name
);
1196 if (ret
== -ENOTSUP
)
1198 "Snapshots not supported on device '%s'\n",
1199 bdrv_get_device_name(bs1
));
1201 monitor_printf(mon
, "Error %d while deleting snapshot on "
1202 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
1208 void do_info_snapshots(Monitor
*mon
)
1210 BlockDriverState
*bs
, *bs1
;
1211 QEMUSnapshotInfo
*sn_tab
, *sn
;
1215 bs
= get_bs_snapshots();
1217 monitor_printf(mon
, "No available block device supports snapshots\n");
1220 monitor_printf(mon
, "Snapshot devices:");
1221 for(i
= 0; i
<= nb_drives
; i
++) {
1222 bs1
= drives_table
[i
].bdrv
;
1223 if (bdrv_has_snapshot(bs1
)) {
1225 monitor_printf(mon
, " %s", bdrv_get_device_name(bs1
));
1228 monitor_printf(mon
, "\n");
1230 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1232 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
1235 monitor_printf(mon
, "Snapshot list (from %s):\n",
1236 bdrv_get_device_name(bs
));
1237 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
1238 for(i
= 0; i
< nb_sns
; i
++) {
1240 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));