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 CONFIG_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 #include <arpa/inet.h>
48 #include <sys/select.h>
51 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
59 #include <linux/rtc.h>
67 #include <sys/timeb.h>
69 #define getopt_long_only getopt_long
70 #define memalign(align, size) malloc(size)
73 #include "qemu-common.h"
79 #include "qemu-timer.h"
80 #include "qemu-char.h"
82 #include "audio/audio.h"
83 #include "migration.h"
84 #include "qemu_socket.h"
85 #include "qemu-queue.h"
87 #define SELF_ANNOUNCE_ROUNDS 5
90 #define ETH_P_RARP 0x8035
92 #define ARP_HTYPE_ETH 0x0001
93 #define ARP_PTYPE_IP 0x0800
94 #define ARP_OP_REQUEST_REV 0x3
96 static int announce_self_create(uint8_t *buf
,
99 /* Ethernet header. */
100 memset(buf
, 0xff, 6); /* destination MAC addr */
101 memcpy(buf
+ 6, mac_addr
, 6); /* source MAC addr */
102 *(uint16_t *)(buf
+ 12) = htons(ETH_P_RARP
); /* ethertype */
105 *(uint16_t *)(buf
+ 14) = htons(ARP_HTYPE_ETH
); /* hardware addr space */
106 *(uint16_t *)(buf
+ 16) = htons(ARP_PTYPE_IP
); /* protocol addr space */
107 *(buf
+ 18) = 6; /* hardware addr length (ethernet) */
108 *(buf
+ 19) = 4; /* protocol addr length (IPv4) */
109 *(uint16_t *)(buf
+ 20) = htons(ARP_OP_REQUEST_REV
); /* opcode */
110 memcpy(buf
+ 22, mac_addr
, 6); /* source hw addr */
111 memset(buf
+ 28, 0x00, 4); /* source protocol addr */
112 memcpy(buf
+ 32, mac_addr
, 6); /* target hw addr */
113 memset(buf
+ 38, 0x00, 4); /* target protocol addr */
115 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
116 memset(buf
+ 42, 0x00, 18);
118 return 60; /* len (FCS will be added by hardware) */
121 static void qemu_announce_self_iter(NICState
*nic
, void *opaque
)
126 len
= announce_self_create(buf
, nic
->conf
->macaddr
.a
);
128 qemu_send_packet_raw(&nic
->nc
, buf
, len
);
132 static void qemu_announce_self_once(void *opaque
)
134 static int count
= SELF_ANNOUNCE_ROUNDS
;
135 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
137 qemu_foreach_nic(qemu_announce_self_iter
, NULL
);
140 /* delay 50ms, 150ms, 250ms, ... */
141 qemu_mod_timer(timer
, qemu_get_clock(rt_clock
) +
142 50 + (SELF_ANNOUNCE_ROUNDS
- count
- 1) * 100);
144 qemu_del_timer(timer
);
145 qemu_free_timer(timer
);
149 void qemu_announce_self(void)
151 static QEMUTimer
*timer
;
152 timer
= qemu_new_timer(rt_clock
, qemu_announce_self_once
, &timer
);
153 qemu_announce_self_once(&timer
);
156 /***********************************************************/
157 /* savevm/loadvm support */
159 #define IO_BUF_SIZE 32768
162 QEMUFilePutBufferFunc
*put_buffer
;
163 QEMUFileGetBufferFunc
*get_buffer
;
164 QEMUFileCloseFunc
*close
;
165 QEMUFileRateLimit
*rate_limit
;
166 QEMUFileSetRateLimit
*set_rate_limit
;
167 QEMUFileGetRateLimit
*get_rate_limit
;
171 int64_t buf_offset
; /* start of buffer when writing, end of buffer
174 int buf_size
; /* 0 when writing */
175 uint8_t buf
[IO_BUF_SIZE
];
180 typedef struct QEMUFileStdio
186 typedef struct QEMUFileSocket
192 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
194 QEMUFileSocket
*s
= opaque
;
198 len
= recv(s
->fd
, (void *)buf
, size
, 0);
199 } while (len
== -1 && socket_error() == EINTR
);
202 len
= -socket_error();
207 static int socket_close(void *opaque
)
209 QEMUFileSocket
*s
= opaque
;
214 static int stdio_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
216 QEMUFileStdio
*s
= opaque
;
217 return fwrite(buf
, 1, size
, s
->stdio_file
);
220 static int stdio_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
222 QEMUFileStdio
*s
= opaque
;
223 FILE *fp
= s
->stdio_file
;
228 bytes
= fread(buf
, 1, size
, fp
);
229 } while ((bytes
== 0) && ferror(fp
) && (errno
== EINTR
));
233 static int stdio_pclose(void *opaque
)
235 QEMUFileStdio
*s
= opaque
;
237 ret
= pclose(s
->stdio_file
);
242 static int stdio_fclose(void *opaque
)
244 QEMUFileStdio
*s
= opaque
;
245 fclose(s
->stdio_file
);
250 QEMUFile
*qemu_popen(FILE *stdio_file
, const char *mode
)
254 if (stdio_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
255 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
259 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
261 s
->stdio_file
= stdio_file
;
264 s
->file
= qemu_fopen_ops(s
, NULL
, stdio_get_buffer
, stdio_pclose
,
267 s
->file
= qemu_fopen_ops(s
, stdio_put_buffer
, NULL
, stdio_pclose
,
273 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
277 popen_file
= popen(command
, mode
);
278 if(popen_file
== NULL
) {
282 return qemu_popen(popen_file
, mode
);
285 int qemu_stdio_fd(QEMUFile
*f
)
290 p
= (QEMUFileStdio
*)f
->opaque
;
291 fd
= fileno(p
->stdio_file
);
296 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
301 (mode
[0] != 'r' && mode
[0] != 'w') ||
302 mode
[1] != 'b' || mode
[2] != 0) {
303 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
307 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
308 s
->stdio_file
= fdopen(fd
, mode
);
313 s
->file
= qemu_fopen_ops(s
, NULL
, stdio_get_buffer
, stdio_fclose
,
316 s
->file
= qemu_fopen_ops(s
, stdio_put_buffer
, NULL
, stdio_fclose
,
326 QEMUFile
*qemu_fopen_socket(int fd
)
328 QEMUFileSocket
*s
= qemu_mallocz(sizeof(QEMUFileSocket
));
331 s
->file
= qemu_fopen_ops(s
, NULL
, socket_get_buffer
, socket_close
,
336 static int file_put_buffer(void *opaque
, const uint8_t *buf
,
337 int64_t pos
, int size
)
339 QEMUFileStdio
*s
= opaque
;
340 fseek(s
->stdio_file
, pos
, SEEK_SET
);
341 return fwrite(buf
, 1, size
, s
->stdio_file
);
344 static int file_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
346 QEMUFileStdio
*s
= opaque
;
347 fseek(s
->stdio_file
, pos
, SEEK_SET
);
348 return fread(buf
, 1, size
, s
->stdio_file
);
351 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
356 (mode
[0] != 'r' && mode
[0] != 'w') ||
357 mode
[1] != 'b' || mode
[2] != 0) {
358 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
362 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
364 s
->stdio_file
= fopen(filename
, mode
);
369 s
->file
= qemu_fopen_ops(s
, file_put_buffer
, NULL
, stdio_fclose
,
372 s
->file
= qemu_fopen_ops(s
, NULL
, file_get_buffer
, stdio_fclose
,
381 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
382 int64_t pos
, int size
)
384 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
388 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
390 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
393 static int bdrv_fclose(void *opaque
)
398 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
401 return qemu_fopen_ops(bs
, block_put_buffer
, NULL
, bdrv_fclose
,
403 return qemu_fopen_ops(bs
, NULL
, block_get_buffer
, bdrv_fclose
, NULL
, NULL
, NULL
);
406 QEMUFile
*qemu_fopen_ops(void *opaque
, QEMUFilePutBufferFunc
*put_buffer
,
407 QEMUFileGetBufferFunc
*get_buffer
,
408 QEMUFileCloseFunc
*close
,
409 QEMUFileRateLimit
*rate_limit
,
410 QEMUFileSetRateLimit
*set_rate_limit
,
411 QEMUFileGetRateLimit
*get_rate_limit
)
415 f
= qemu_mallocz(sizeof(QEMUFile
));
418 f
->put_buffer
= put_buffer
;
419 f
->get_buffer
= get_buffer
;
421 f
->rate_limit
= rate_limit
;
422 f
->set_rate_limit
= set_rate_limit
;
423 f
->get_rate_limit
= get_rate_limit
;
429 int qemu_file_has_error(QEMUFile
*f
)
434 void qemu_file_set_error(QEMUFile
*f
)
439 void qemu_fflush(QEMUFile
*f
)
444 if (f
->is_write
&& f
->buf_index
> 0) {
447 len
= f
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
449 f
->buf_offset
+= f
->buf_index
;
456 static void qemu_fill_buffer(QEMUFile
*f
)
466 len
= f
->get_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, IO_BUF_SIZE
);
470 f
->buf_offset
+= len
;
471 } else if (len
!= -EAGAIN
)
475 int qemu_fclose(QEMUFile
*f
)
480 ret
= f
->close(f
->opaque
);
485 void qemu_file_put_notify(QEMUFile
*f
)
487 f
->put_buffer(f
->opaque
, NULL
, 0, 0);
490 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
494 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
496 "Attempted to write to buffer while read buffer is not empty\n");
500 while (!f
->has_error
&& size
> 0) {
501 l
= IO_BUF_SIZE
- f
->buf_index
;
504 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
509 if (f
->buf_index
>= IO_BUF_SIZE
)
514 void qemu_put_byte(QEMUFile
*f
, int v
)
516 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
518 "Attempted to write to buffer while read buffer is not empty\n");
522 f
->buf
[f
->buf_index
++] = v
;
524 if (f
->buf_index
>= IO_BUF_SIZE
)
528 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size1
)
537 l
= f
->buf_size
- f
->buf_index
;
540 l
= f
->buf_size
- f
->buf_index
;
546 memcpy(buf
, f
->buf
+ f
->buf_index
, l
);
554 static int qemu_peek_byte(QEMUFile
*f
)
559 if (f
->buf_index
>= f
->buf_size
) {
561 if (f
->buf_index
>= f
->buf_size
)
564 return f
->buf
[f
->buf_index
];
567 int qemu_get_byte(QEMUFile
*f
)
572 if (f
->buf_index
>= f
->buf_size
) {
574 if (f
->buf_index
>= f
->buf_size
)
577 return f
->buf
[f
->buf_index
++];
580 int64_t qemu_ftell(QEMUFile
*f
)
582 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
585 int64_t qemu_fseek(QEMUFile
*f
, int64_t pos
, int whence
)
587 if (whence
== SEEK_SET
) {
589 } else if (whence
== SEEK_CUR
) {
590 pos
+= qemu_ftell(f
);
592 /* SEEK_END not supported */
606 int qemu_file_rate_limit(QEMUFile
*f
)
609 return f
->rate_limit(f
->opaque
);
614 size_t qemu_file_get_rate_limit(QEMUFile
*f
)
616 if (f
->get_rate_limit
)
617 return f
->get_rate_limit(f
->opaque
);
622 size_t qemu_file_set_rate_limit(QEMUFile
*f
, size_t new_rate
)
624 /* any failed or completed migration keeps its state to allow probing of
625 * migration data, but has no associated file anymore */
626 if (f
&& f
->set_rate_limit
)
627 return f
->set_rate_limit(f
->opaque
, new_rate
);
632 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
634 qemu_put_byte(f
, v
>> 8);
638 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
640 qemu_put_byte(f
, v
>> 24);
641 qemu_put_byte(f
, v
>> 16);
642 qemu_put_byte(f
, v
>> 8);
646 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
648 qemu_put_be32(f
, v
>> 32);
652 unsigned int qemu_get_be16(QEMUFile
*f
)
655 v
= qemu_get_byte(f
) << 8;
656 v
|= qemu_get_byte(f
);
660 unsigned int qemu_get_be32(QEMUFile
*f
)
663 v
= qemu_get_byte(f
) << 24;
664 v
|= qemu_get_byte(f
) << 16;
665 v
|= qemu_get_byte(f
) << 8;
666 v
|= qemu_get_byte(f
);
670 uint64_t qemu_get_be64(QEMUFile
*f
)
673 v
= (uint64_t)qemu_get_be32(f
) << 32;
674 v
|= qemu_get_be32(f
);
680 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
683 *v
= qemu_get_byte(f
);
687 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
690 qemu_put_byte(f
, *v
);
693 const VMStateInfo vmstate_info_bool
= {
701 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
708 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
714 const VMStateInfo vmstate_info_int8
= {
722 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
725 qemu_get_sbe16s(f
, v
);
729 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
732 qemu_put_sbe16s(f
, v
);
735 const VMStateInfo vmstate_info_int16
= {
743 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
746 qemu_get_sbe32s(f
, v
);
750 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
753 qemu_put_sbe32s(f
, v
);
756 const VMStateInfo vmstate_info_int32
= {
762 /* 32 bit int. See that the received value is the same than the one
765 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
769 qemu_get_sbe32s(f
, &v2
);
776 const VMStateInfo vmstate_info_int32_equal
= {
777 .name
= "int32 equal",
778 .get
= get_int32_equal
,
782 /* 32 bit int. See that the received value is the less or the same
783 than the one in the field */
785 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
789 qemu_get_sbe32s(f
, &new);
796 const VMStateInfo vmstate_info_int32_le
= {
797 .name
= "int32 equal",
804 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
807 qemu_get_sbe64s(f
, v
);
811 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
814 qemu_put_sbe64s(f
, v
);
817 const VMStateInfo vmstate_info_int64
= {
823 /* 8 bit unsigned int */
825 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
832 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
838 const VMStateInfo vmstate_info_uint8
= {
844 /* 16 bit unsigned int */
846 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
849 qemu_get_be16s(f
, v
);
853 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
856 qemu_put_be16s(f
, v
);
859 const VMStateInfo vmstate_info_uint16
= {
865 /* 32 bit unsigned int */
867 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
870 qemu_get_be32s(f
, v
);
874 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
877 qemu_put_be32s(f
, v
);
880 const VMStateInfo vmstate_info_uint32
= {
886 /* 64 bit unsigned int */
888 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
891 qemu_get_be64s(f
, v
);
895 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
898 qemu_put_be64s(f
, v
);
901 const VMStateInfo vmstate_info_uint64
= {
907 /* 64 bit linux kernel unsigned int */
910 static int get_u64(QEMUFile
*f
, void *pv
, size_t size
)
913 qemu_get_be64s(f
, v
);
917 static void put_u64(QEMUFile
*f
, void *pv
, size_t size
)
920 qemu_put_be64s(f
, v
);
923 const VMStateInfo vmstate_info_u64
= {
928 #endif /* __linux__ */
930 /* 8 bit int. See that the received value is the same than the one
933 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
944 const VMStateInfo vmstate_info_uint8_equal
= {
945 .name
= "uint8 equal",
946 .get
= get_uint8_equal
,
950 /* 16 bit unsigned int int. See that the received value is the same than the one
953 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
957 qemu_get_be16s(f
, &v2
);
964 const VMStateInfo vmstate_info_uint16_equal
= {
965 .name
= "uint16 equal",
966 .get
= get_uint16_equal
,
972 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
975 qemu_get_timer(f
, v
);
979 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
982 qemu_put_timer(f
, v
);
985 const VMStateInfo vmstate_info_timer
= {
991 /* uint8_t buffers */
993 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
996 qemu_get_buffer(f
, v
, size
);
1000 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1003 qemu_put_buffer(f
, v
, size
);
1006 const VMStateInfo vmstate_info_buffer
= {
1012 /* unused buffers: space that was used for some fields that are
1013 not usefull anymore */
1015 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1021 block_len
= MIN(sizeof(buf
), size
);
1023 qemu_get_buffer(f
, buf
, block_len
);
1028 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1030 static const uint8_t buf
[1024];
1034 block_len
= MIN(sizeof(buf
), size
);
1036 qemu_put_buffer(f
, buf
, block_len
);
1040 const VMStateInfo vmstate_info_unused_buffer
= {
1041 .name
= "unused_buffer",
1042 .get
= get_unused_buffer
,
1043 .put
= put_unused_buffer
,
1046 typedef struct CompatEntry
{
1051 typedef struct SaveStateEntry
{
1052 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1058 SaveSetParamsHandler
*set_params
;
1059 SaveLiveStateHandler
*save_live_state
;
1060 SaveStateHandler
*save_state
;
1061 LoadStateHandler
*load_state
;
1062 const VMStateDescription
*vmsd
;
1064 CompatEntry
*compat
;
1069 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1070 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1071 static int global_section_id
;
1073 static int calculate_new_instance_id(const char *idstr
)
1076 int instance_id
= 0;
1078 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1079 if (strcmp(idstr
, se
->idstr
) == 0
1080 && instance_id
<= se
->instance_id
) {
1081 instance_id
= se
->instance_id
+ 1;
1087 static int calculate_compat_instance_id(const char *idstr
)
1090 int instance_id
= 0;
1092 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1096 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1097 && instance_id
<= se
->compat
->instance_id
) {
1098 instance_id
= se
->compat
->instance_id
+ 1;
1104 /* TODO: Individual devices generally have very little idea about the rest
1105 of the system, so instance_id should be removed/replaced.
1106 Meanwhile pass -1 as instance_id if you do not already have a clearly
1107 distinguishing id for all instances of your device class. */
1108 int register_savevm_live(DeviceState
*dev
,
1112 SaveSetParamsHandler
*set_params
,
1113 SaveLiveStateHandler
*save_live_state
,
1114 SaveStateHandler
*save_state
,
1115 LoadStateHandler
*load_state
,
1120 se
= qemu_mallocz(sizeof(SaveStateEntry
));
1121 se
->version_id
= version_id
;
1122 se
->section_id
= global_section_id
++;
1123 se
->set_params
= set_params
;
1124 se
->save_live_state
= save_live_state
;
1125 se
->save_state
= save_state
;
1126 se
->load_state
= load_state
;
1127 se
->opaque
= opaque
;
1131 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1132 char *id
= dev
->parent_bus
->info
->get_dev_path(dev
);
1134 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1135 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1138 se
->compat
= qemu_mallocz(sizeof(CompatEntry
));
1139 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1140 se
->compat
->instance_id
= instance_id
== -1 ?
1141 calculate_compat_instance_id(idstr
) : instance_id
;
1145 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1147 if (instance_id
== -1) {
1148 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1150 se
->instance_id
= instance_id
;
1152 assert(!se
->compat
|| se
->instance_id
== 0);
1153 /* add at the end of list */
1154 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1158 int register_savevm(DeviceState
*dev
,
1162 SaveStateHandler
*save_state
,
1163 LoadStateHandler
*load_state
,
1166 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1167 NULL
, NULL
, save_state
, load_state
, opaque
);
1170 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1172 SaveStateEntry
*se
, *new_se
;
1175 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1176 char *path
= dev
->parent_bus
->info
->get_dev_path(dev
);
1178 pstrcpy(id
, sizeof(id
), path
);
1179 pstrcat(id
, sizeof(id
), "/");
1183 pstrcat(id
, sizeof(id
), idstr
);
1185 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1186 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1187 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1189 qemu_free(se
->compat
);
1196 /* mark a device as not to be migrated, that is the device should be
1197 unplugged before migration */
1198 void register_device_unmigratable(DeviceState
*dev
, const char *idstr
,
1204 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1205 char *path
= dev
->parent_bus
->info
->get_dev_path(dev
);
1207 pstrcpy(id
, sizeof(id
), path
);
1208 pstrcat(id
, sizeof(id
), "/");
1212 pstrcat(id
, sizeof(id
), idstr
);
1214 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1215 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1221 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1222 const VMStateDescription
*vmsd
,
1223 void *opaque
, int alias_id
,
1224 int required_for_version
)
1228 /* If this triggers, alias support can be dropped for the vmsd. */
1229 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1231 se
= qemu_mallocz(sizeof(SaveStateEntry
));
1232 se
->version_id
= vmsd
->version_id
;
1233 se
->section_id
= global_section_id
++;
1234 se
->save_live_state
= NULL
;
1235 se
->save_state
= NULL
;
1236 se
->load_state
= NULL
;
1237 se
->opaque
= opaque
;
1239 se
->alias_id
= alias_id
;
1241 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1242 char *id
= dev
->parent_bus
->info
->get_dev_path(dev
);
1244 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1245 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1248 se
->compat
= qemu_mallocz(sizeof(CompatEntry
));
1249 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1250 se
->compat
->instance_id
= instance_id
== -1 ?
1251 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1255 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1257 if (instance_id
== -1) {
1258 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1260 se
->instance_id
= instance_id
;
1262 assert(!se
->compat
|| se
->instance_id
== 0);
1263 /* add at the end of list */
1264 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1268 int vmstate_register(DeviceState
*dev
, int instance_id
,
1269 const VMStateDescription
*vmsd
, void *opaque
)
1271 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1275 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1278 SaveStateEntry
*se
, *new_se
;
1280 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1281 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1282 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1284 qemu_free(se
->compat
);
1291 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1293 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1296 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1297 void *opaque
, int version_id
)
1299 VMStateField
*field
= vmsd
->fields
;
1302 if (version_id
> vmsd
->version_id
) {
1305 if (version_id
< vmsd
->minimum_version_id_old
) {
1308 if (version_id
< vmsd
->minimum_version_id
) {
1309 return vmsd
->load_state_old(f
, opaque
, version_id
);
1311 if (vmsd
->pre_load
) {
1312 int ret
= vmsd
->pre_load(opaque
);
1316 while(field
->name
) {
1317 if ((field
->field_exists
&&
1318 field
->field_exists(opaque
, version_id
)) ||
1319 (!field
->field_exists
&&
1320 field
->version_id
<= version_id
)) {
1321 void *base_addr
= opaque
+ field
->offset
;
1323 int size
= field
->size
;
1325 if (field
->flags
& VMS_VBUFFER
) {
1326 size
= *(int32_t *)(opaque
+field
->size_offset
);
1327 if (field
->flags
& VMS_MULTIPLY
) {
1328 size
*= field
->size
;
1331 if (field
->flags
& VMS_ARRAY
) {
1332 n_elems
= field
->num
;
1333 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1334 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1335 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1336 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1338 if (field
->flags
& VMS_POINTER
) {
1339 base_addr
= *(void **)base_addr
+ field
->start
;
1341 for (i
= 0; i
< n_elems
; i
++) {
1342 void *addr
= base_addr
+ size
* i
;
1344 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1345 addr
= *(void **)addr
;
1347 if (field
->flags
& VMS_STRUCT
) {
1348 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1350 ret
= field
->info
->get(f
, addr
, size
);
1360 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1364 if (vmsd
->post_load
) {
1365 return vmsd
->post_load(opaque
, version_id
);
1370 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1373 VMStateField
*field
= vmsd
->fields
;
1375 if (vmsd
->pre_save
) {
1376 vmsd
->pre_save(opaque
);
1378 while(field
->name
) {
1379 if (!field
->field_exists
||
1380 field
->field_exists(opaque
, vmsd
->version_id
)) {
1381 void *base_addr
= opaque
+ field
->offset
;
1383 int size
= field
->size
;
1385 if (field
->flags
& VMS_VBUFFER
) {
1386 size
= *(int32_t *)(opaque
+field
->size_offset
);
1387 if (field
->flags
& VMS_MULTIPLY
) {
1388 size
*= field
->size
;
1391 if (field
->flags
& VMS_ARRAY
) {
1392 n_elems
= field
->num
;
1393 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1394 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1395 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1396 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1398 if (field
->flags
& VMS_POINTER
) {
1399 base_addr
= *(void **)base_addr
+ field
->start
;
1401 for (i
= 0; i
< n_elems
; i
++) {
1402 void *addr
= base_addr
+ size
* i
;
1404 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1405 addr
= *(void **)addr
;
1407 if (field
->flags
& VMS_STRUCT
) {
1408 vmstate_save_state(f
, field
->vmsd
, addr
);
1410 field
->info
->put(f
, addr
, size
);
1416 vmstate_subsection_save(f
, vmsd
, opaque
);
1419 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1421 if (!se
->vmsd
) { /* Old style */
1422 return se
->load_state(f
, se
->opaque
, version_id
);
1424 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1427 static int vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1429 if (se
->no_migrate
) {
1433 if (!se
->vmsd
) { /* Old style */
1434 se
->save_state(f
, se
->opaque
);
1437 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1442 #define QEMU_VM_FILE_MAGIC 0x5145564d
1443 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1444 #define QEMU_VM_FILE_VERSION 0x00000003
1446 #define QEMU_VM_EOF 0x00
1447 #define QEMU_VM_SECTION_START 0x01
1448 #define QEMU_VM_SECTION_PART 0x02
1449 #define QEMU_VM_SECTION_END 0x03
1450 #define QEMU_VM_SECTION_FULL 0x04
1451 #define QEMU_VM_SUBSECTION 0x05
1453 int qemu_savevm_state_begin(Monitor
*mon
, QEMUFile
*f
, int blk_enable
,
1458 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1459 if(se
->set_params
== NULL
) {
1462 se
->set_params(blk_enable
, shared
, se
->opaque
);
1465 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1466 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1468 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1471 if (se
->save_live_state
== NULL
)
1475 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1476 qemu_put_be32(f
, se
->section_id
);
1479 len
= strlen(se
->idstr
);
1480 qemu_put_byte(f
, len
);
1481 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1483 qemu_put_be32(f
, se
->instance_id
);
1484 qemu_put_be32(f
, se
->version_id
);
1486 se
->save_live_state(mon
, f
, QEMU_VM_SECTION_START
, se
->opaque
);
1489 if (qemu_file_has_error(f
)) {
1490 qemu_savevm_state_cancel(mon
, f
);
1497 int qemu_savevm_state_iterate(Monitor
*mon
, QEMUFile
*f
)
1502 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1503 if (se
->save_live_state
== NULL
)
1507 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1508 qemu_put_be32(f
, se
->section_id
);
1510 ret
= se
->save_live_state(mon
, f
, QEMU_VM_SECTION_PART
, se
->opaque
);
1512 /* Do not proceed to the next vmstate before this one reported
1513 completion of the current stage. This serializes the migration
1514 and reduces the probability that a faster changing state is
1515 synchronized over and over again. */
1523 if (qemu_file_has_error(f
)) {
1524 qemu_savevm_state_cancel(mon
, f
);
1531 int qemu_savevm_state_complete(Monitor
*mon
, QEMUFile
*f
)
1536 cpu_synchronize_all_states();
1538 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1539 if (se
->save_live_state
== NULL
)
1543 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1544 qemu_put_be32(f
, se
->section_id
);
1546 se
->save_live_state(mon
, f
, QEMU_VM_SECTION_END
, se
->opaque
);
1549 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1552 if (se
->save_state
== NULL
&& se
->vmsd
== NULL
)
1556 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1557 qemu_put_be32(f
, se
->section_id
);
1560 len
= strlen(se
->idstr
);
1561 qemu_put_byte(f
, len
);
1562 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1564 qemu_put_be32(f
, se
->instance_id
);
1565 qemu_put_be32(f
, se
->version_id
);
1567 r
= vmstate_save(f
, se
);
1569 monitor_printf(mon
, "cannot migrate with device '%s'\n", se
->idstr
);
1574 qemu_put_byte(f
, QEMU_VM_EOF
);
1576 if (qemu_file_has_error(f
))
1582 void qemu_savevm_state_cancel(Monitor
*mon
, QEMUFile
*f
)
1586 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1587 if (se
->save_live_state
) {
1588 se
->save_live_state(mon
, f
, -1, se
->opaque
);
1593 static int qemu_savevm_state(Monitor
*mon
, QEMUFile
*f
)
1595 int saved_vm_running
;
1598 saved_vm_running
= vm_running
;
1603 ret
= qemu_savevm_state_begin(mon
, f
, 0, 0);
1608 ret
= qemu_savevm_state_iterate(mon
, f
);
1613 ret
= qemu_savevm_state_complete(mon
, f
);
1616 if (qemu_file_has_error(f
))
1619 if (!ret
&& saved_vm_running
)
1625 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1629 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1630 if (!strcmp(se
->idstr
, idstr
) &&
1631 (instance_id
== se
->instance_id
||
1632 instance_id
== se
->alias_id
))
1634 /* Migrating from an older version? */
1635 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1636 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1637 (instance_id
== se
->compat
->instance_id
||
1638 instance_id
== se
->alias_id
))
1645 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1647 while(sub
&& sub
->needed
) {
1648 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1656 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1659 while (qemu_peek_byte(f
) == QEMU_VM_SUBSECTION
) {
1662 uint8_t version_id
, len
;
1663 const VMStateDescription
*sub_vmsd
;
1665 qemu_get_byte(f
); /* subsection */
1666 len
= qemu_get_byte(f
);
1667 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1669 version_id
= qemu_get_be32(f
);
1671 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1672 if (sub_vmsd
== NULL
) {
1675 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1683 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1686 const VMStateSubsection
*sub
= vmsd
->subsections
;
1688 while (sub
&& sub
->needed
) {
1689 if (sub
->needed(opaque
)) {
1690 const VMStateDescription
*vmsd
= sub
->vmsd
;
1693 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1694 len
= strlen(vmsd
->name
);
1695 qemu_put_byte(f
, len
);
1696 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1697 qemu_put_be32(f
, vmsd
->version_id
);
1698 vmstate_save_state(f
, vmsd
, opaque
);
1704 typedef struct LoadStateEntry
{
1705 QLIST_ENTRY(LoadStateEntry
) entry
;
1711 int qemu_loadvm_state(QEMUFile
*f
)
1713 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1714 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1715 LoadStateEntry
*le
, *new_le
;
1716 uint8_t section_type
;
1720 v
= qemu_get_be32(f
);
1721 if (v
!= QEMU_VM_FILE_MAGIC
)
1724 v
= qemu_get_be32(f
);
1725 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1726 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1729 if (v
!= QEMU_VM_FILE_VERSION
)
1732 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1733 uint32_t instance_id
, version_id
, section_id
;
1738 switch (section_type
) {
1739 case QEMU_VM_SECTION_START
:
1740 case QEMU_VM_SECTION_FULL
:
1741 /* Read section start */
1742 section_id
= qemu_get_be32(f
);
1743 len
= qemu_get_byte(f
);
1744 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1746 instance_id
= qemu_get_be32(f
);
1747 version_id
= qemu_get_be32(f
);
1749 /* Find savevm section */
1750 se
= find_se(idstr
, instance_id
);
1752 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1757 /* Validate version */
1758 if (version_id
> se
->version_id
) {
1759 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1760 version_id
, idstr
, se
->version_id
);
1766 le
= qemu_mallocz(sizeof(*le
));
1769 le
->section_id
= section_id
;
1770 le
->version_id
= version_id
;
1771 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
1773 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1775 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1776 instance_id
, idstr
);
1780 case QEMU_VM_SECTION_PART
:
1781 case QEMU_VM_SECTION_END
:
1782 section_id
= qemu_get_be32(f
);
1784 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
1785 if (le
->section_id
== section_id
) {
1790 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
1795 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1797 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
1803 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
1809 cpu_synchronize_all_post_init();
1814 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
1815 QLIST_REMOVE(le
, entry
);
1819 if (qemu_file_has_error(f
))
1825 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
1828 QEMUSnapshotInfo
*sn_tab
, *sn
;
1832 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1835 for(i
= 0; i
< nb_sns
; i
++) {
1837 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
1848 * Deletes snapshots of a given name in all opened images.
1850 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
1852 BlockDriverState
*bs
;
1853 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
1857 while ((bs
= bdrv_next(bs
))) {
1858 if (bdrv_can_snapshot(bs
) &&
1859 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
1861 ret
= bdrv_snapshot_delete(bs
, name
);
1864 "Error while deleting snapshot on '%s'\n",
1865 bdrv_get_device_name(bs
));
1874 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
1876 BlockDriverState
*bs
, *bs1
;
1877 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
1880 int saved_vm_running
;
1881 uint32_t vm_state_size
;
1889 const char *name
= qdict_get_try_str(qdict
, "name");
1891 /* Verify if there is a device that doesn't support snapshots and is writable */
1893 while ((bs
= bdrv_next(bs
))) {
1895 if (bdrv_is_removable(bs
) || bdrv_is_read_only(bs
)) {
1899 if (!bdrv_can_snapshot(bs
)) {
1900 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
1901 bdrv_get_device_name(bs
));
1906 bs
= bdrv_snapshots();
1908 monitor_printf(mon
, "No block device can accept snapshots\n");
1911 /* ??? Should this occur after vm_stop? */
1914 saved_vm_running
= vm_running
;
1917 memset(sn
, 0, sizeof(*sn
));
1919 /* fill auxiliary fields */
1922 sn
->date_sec
= tb
.time
;
1923 sn
->date_nsec
= tb
.millitm
* 1000000;
1925 gettimeofday(&tv
, NULL
);
1926 sn
->date_sec
= tv
.tv_sec
;
1927 sn
->date_nsec
= tv
.tv_usec
* 1000;
1929 sn
->vm_clock_nsec
= qemu_get_clock(vm_clock
);
1932 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
1934 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
1935 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
1937 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1941 ptm
= localtime(&tb
.time
);
1942 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", ptm
);
1944 /* cast below needed for OpenBSD where tv_sec is still 'long' */
1945 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
1946 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
1950 /* Delete old snapshots of the same name */
1951 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
1955 /* save the VM state */
1956 f
= qemu_fopen_bdrv(bs
, 1);
1958 monitor_printf(mon
, "Could not open VM state file\n");
1961 ret
= qemu_savevm_state(mon
, f
);
1962 vm_state_size
= qemu_ftell(f
);
1965 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
1969 /* create the snapshots */
1972 while ((bs1
= bdrv_next(bs1
))) {
1973 if (bdrv_can_snapshot(bs1
)) {
1974 /* Write VM state size only to the image that contains the state */
1975 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
1976 ret
= bdrv_snapshot_create(bs1
, sn
);
1978 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
1979 bdrv_get_device_name(bs1
));
1985 if (saved_vm_running
)
1989 int load_vmstate(const char *name
)
1991 BlockDriverState
*bs
, *bs_vm_state
;
1992 QEMUSnapshotInfo sn
;
1996 bs_vm_state
= bdrv_snapshots();
1998 error_report("No block device supports snapshots");
2002 /* Don't even try to load empty VM states */
2003 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2006 } else if (sn
.vm_state_size
== 0) {
2010 /* Verify if there is any device that doesn't support snapshots and is
2011 writable and check if the requested snapshot is available too. */
2013 while ((bs
= bdrv_next(bs
))) {
2015 if (bdrv_is_removable(bs
) || bdrv_is_read_only(bs
)) {
2019 if (!bdrv_can_snapshot(bs
)) {
2020 error_report("Device '%s' is writable but does not support snapshots.",
2021 bdrv_get_device_name(bs
));
2025 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2027 error_report("Device '%s' does not have the requested snapshot '%s'",
2028 bdrv_get_device_name(bs
), name
);
2033 /* Flush all IO requests so they don't interfere with the new state. */
2037 while ((bs
= bdrv_next(bs
))) {
2038 if (bdrv_can_snapshot(bs
)) {
2039 ret
= bdrv_snapshot_goto(bs
, name
);
2041 error_report("Error %d while activating snapshot '%s' on '%s'",
2042 ret
, name
, bdrv_get_device_name(bs
));
2048 /* restore the VM state */
2049 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2051 error_report("Could not open VM state file");
2055 ret
= qemu_loadvm_state(f
);
2059 error_report("Error %d while loading VM state", ret
);
2066 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2068 BlockDriverState
*bs
, *bs1
;
2070 const char *name
= qdict_get_str(qdict
, "name");
2072 bs
= bdrv_snapshots();
2074 monitor_printf(mon
, "No block device supports snapshots\n");
2079 while ((bs1
= bdrv_next(bs1
))) {
2080 if (bdrv_can_snapshot(bs1
)) {
2081 ret
= bdrv_snapshot_delete(bs1
, name
);
2083 if (ret
== -ENOTSUP
)
2085 "Snapshots not supported on device '%s'\n",
2086 bdrv_get_device_name(bs1
));
2088 monitor_printf(mon
, "Error %d while deleting snapshot on "
2089 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2095 void do_info_snapshots(Monitor
*mon
)
2097 BlockDriverState
*bs
, *bs1
;
2098 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2099 int nb_sns
, i
, ret
, available
;
2101 int *available_snapshots
;
2104 bs
= bdrv_snapshots();
2106 monitor_printf(mon
, "No available block device supports snapshots\n");
2110 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2112 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2117 monitor_printf(mon
, "There is no snapshot available.\n");
2121 available_snapshots
= qemu_mallocz(sizeof(int) * nb_sns
);
2123 for (i
= 0; i
< nb_sns
; i
++) {
2128 while ((bs1
= bdrv_next(bs1
))) {
2129 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2130 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2139 available_snapshots
[total
] = i
;
2145 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2146 for (i
= 0; i
< total
; i
++) {
2147 sn
= &sn_tab
[available_snapshots
[i
]];
2148 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2151 monitor_printf(mon
, "There is no suitable snapshot available\n");
2155 qemu_free(available_snapshots
);