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
31 /* Needed early for CONFIG_BSD etc. */
32 #include "config-host.h"
35 #include <sys/times.h>
39 #include <sys/ioctl.h>
40 #include <sys/resource.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
44 #include <arpa/inet.h>
47 #include <sys/select.h>
50 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
58 #include <linux/rtc.h>
66 #include <sys/timeb.h>
68 #define getopt_long_only getopt_long
69 #define memalign(align, size) malloc(size)
72 #include "qemu-common.h"
78 #include "qemu-timer.h"
79 #include "qemu-char.h"
80 #include "audio/audio.h"
81 #include "migration.h"
82 #include "qemu_socket.h"
83 #include "qemu-queue.h"
86 #define SELF_ANNOUNCE_ROUNDS 5
89 #define ETH_P_RARP 0x8035
91 #define ARP_HTYPE_ETH 0x0001
92 #define ARP_PTYPE_IP 0x0800
93 #define ARP_OP_REQUEST_REV 0x3
95 static int announce_self_create(uint8_t *buf
,
98 /* Ethernet header. */
99 memset(buf
, 0xff, 6); /* destination MAC addr */
100 memcpy(buf
+ 6, mac_addr
, 6); /* source MAC addr */
101 *(uint16_t *)(buf
+ 12) = htons(ETH_P_RARP
); /* ethertype */
104 *(uint16_t *)(buf
+ 14) = htons(ARP_HTYPE_ETH
); /* hardware addr space */
105 *(uint16_t *)(buf
+ 16) = htons(ARP_PTYPE_IP
); /* protocol addr space */
106 *(buf
+ 18) = 6; /* hardware addr length (ethernet) */
107 *(buf
+ 19) = 4; /* protocol addr length (IPv4) */
108 *(uint16_t *)(buf
+ 20) = htons(ARP_OP_REQUEST_REV
); /* opcode */
109 memcpy(buf
+ 22, mac_addr
, 6); /* source hw addr */
110 memset(buf
+ 28, 0x00, 4); /* source protocol addr */
111 memcpy(buf
+ 32, mac_addr
, 6); /* target hw addr */
112 memset(buf
+ 38, 0x00, 4); /* target protocol addr */
114 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
115 memset(buf
+ 42, 0x00, 18);
117 return 60; /* len (FCS will be added by hardware) */
120 static void qemu_announce_self_iter(NICState
*nic
, void *opaque
)
125 len
= announce_self_create(buf
, nic
->conf
->macaddr
.a
);
127 qemu_send_packet_raw(&nic
->nc
, buf
, len
);
131 static void qemu_announce_self_once(void *opaque
)
133 static int count
= SELF_ANNOUNCE_ROUNDS
;
134 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
136 qemu_foreach_nic(qemu_announce_self_iter
, NULL
);
139 /* delay 50ms, 150ms, 250ms, ... */
140 qemu_mod_timer(timer
, qemu_get_clock_ms(rt_clock
) +
141 50 + (SELF_ANNOUNCE_ROUNDS
- count
- 1) * 100);
143 qemu_del_timer(timer
);
144 qemu_free_timer(timer
);
148 void qemu_announce_self(void)
150 static QEMUTimer
*timer
;
151 timer
= qemu_new_timer_ms(rt_clock
, qemu_announce_self_once
, &timer
);
152 qemu_announce_self_once(&timer
);
155 /***********************************************************/
156 /* savevm/loadvm support */
158 #define IO_BUF_SIZE 32768
161 QEMUFilePutBufferFunc
*put_buffer
;
162 QEMUFileGetBufferFunc
*get_buffer
;
163 QEMUFileCloseFunc
*close
;
164 QEMUFileRateLimit
*rate_limit
;
165 QEMUFileSetRateLimit
*set_rate_limit
;
166 QEMUFileGetRateLimit
*get_rate_limit
;
170 int64_t buf_offset
; /* start of buffer when writing, end of buffer
173 int buf_size
; /* 0 when writing */
174 uint8_t buf
[IO_BUF_SIZE
];
179 typedef struct QEMUFileStdio
185 typedef struct QEMUFileSocket
191 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
193 QEMUFileSocket
*s
= opaque
;
197 len
= qemu_recv(s
->fd
, buf
, size
, 0);
198 } while (len
== -1 && socket_error() == EINTR
);
201 len
= -socket_error();
206 static int socket_close(void *opaque
)
208 QEMUFileSocket
*s
= opaque
;
213 static int stdio_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
215 QEMUFileStdio
*s
= opaque
;
216 return fwrite(buf
, 1, size
, s
->stdio_file
);
219 static int stdio_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
221 QEMUFileStdio
*s
= opaque
;
222 FILE *fp
= s
->stdio_file
;
227 bytes
= fread(buf
, 1, size
, fp
);
228 } while ((bytes
== 0) && ferror(fp
) && (errno
== EINTR
));
232 static int stdio_pclose(void *opaque
)
234 QEMUFileStdio
*s
= opaque
;
236 ret
= pclose(s
->stdio_file
);
241 static int stdio_fclose(void *opaque
)
243 QEMUFileStdio
*s
= opaque
;
244 fclose(s
->stdio_file
);
249 QEMUFile
*qemu_popen(FILE *stdio_file
, const char *mode
)
253 if (stdio_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
254 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
258 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
260 s
->stdio_file
= stdio_file
;
263 s
->file
= qemu_fopen_ops(s
, NULL
, stdio_get_buffer
, stdio_pclose
,
266 s
->file
= qemu_fopen_ops(s
, stdio_put_buffer
, NULL
, stdio_pclose
,
272 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
276 popen_file
= popen(command
, mode
);
277 if(popen_file
== NULL
) {
281 return qemu_popen(popen_file
, mode
);
284 int qemu_stdio_fd(QEMUFile
*f
)
289 p
= (QEMUFileStdio
*)f
->opaque
;
290 fd
= fileno(p
->stdio_file
);
295 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
300 (mode
[0] != 'r' && mode
[0] != 'w') ||
301 mode
[1] != 'b' || mode
[2] != 0) {
302 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
306 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
307 s
->stdio_file
= fdopen(fd
, mode
);
312 s
->file
= qemu_fopen_ops(s
, NULL
, stdio_get_buffer
, stdio_fclose
,
315 s
->file
= qemu_fopen_ops(s
, stdio_put_buffer
, NULL
, stdio_fclose
,
325 QEMUFile
*qemu_fopen_socket(int fd
)
327 QEMUFileSocket
*s
= qemu_mallocz(sizeof(QEMUFileSocket
));
330 s
->file
= qemu_fopen_ops(s
, NULL
, socket_get_buffer
, socket_close
,
335 static int file_put_buffer(void *opaque
, const uint8_t *buf
,
336 int64_t pos
, int size
)
338 QEMUFileStdio
*s
= opaque
;
339 fseek(s
->stdio_file
, pos
, SEEK_SET
);
340 return fwrite(buf
, 1, size
, s
->stdio_file
);
343 static int file_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
345 QEMUFileStdio
*s
= opaque
;
346 fseek(s
->stdio_file
, pos
, SEEK_SET
);
347 return fread(buf
, 1, size
, s
->stdio_file
);
350 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
355 (mode
[0] != 'r' && mode
[0] != 'w') ||
356 mode
[1] != 'b' || mode
[2] != 0) {
357 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
361 s
= qemu_mallocz(sizeof(QEMUFileStdio
));
363 s
->stdio_file
= fopen(filename
, mode
);
368 s
->file
= qemu_fopen_ops(s
, file_put_buffer
, NULL
, stdio_fclose
,
371 s
->file
= qemu_fopen_ops(s
, NULL
, file_get_buffer
, stdio_fclose
,
380 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
381 int64_t pos
, int size
)
383 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
387 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
389 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
392 static int bdrv_fclose(void *opaque
)
397 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
400 return qemu_fopen_ops(bs
, block_put_buffer
, NULL
, bdrv_fclose
,
402 return qemu_fopen_ops(bs
, NULL
, block_get_buffer
, bdrv_fclose
, NULL
, NULL
, NULL
);
405 QEMUFile
*qemu_fopen_ops(void *opaque
, QEMUFilePutBufferFunc
*put_buffer
,
406 QEMUFileGetBufferFunc
*get_buffer
,
407 QEMUFileCloseFunc
*close
,
408 QEMUFileRateLimit
*rate_limit
,
409 QEMUFileSetRateLimit
*set_rate_limit
,
410 QEMUFileGetRateLimit
*get_rate_limit
)
414 f
= qemu_mallocz(sizeof(QEMUFile
));
417 f
->put_buffer
= put_buffer
;
418 f
->get_buffer
= get_buffer
;
420 f
->rate_limit
= rate_limit
;
421 f
->set_rate_limit
= set_rate_limit
;
422 f
->get_rate_limit
= get_rate_limit
;
428 int qemu_file_has_error(QEMUFile
*f
)
433 void qemu_file_set_error(QEMUFile
*f
)
438 void qemu_fflush(QEMUFile
*f
)
443 if (f
->is_write
&& f
->buf_index
> 0) {
446 len
= f
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
448 f
->buf_offset
+= f
->buf_index
;
455 static void qemu_fill_buffer(QEMUFile
*f
)
465 len
= f
->get_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, IO_BUF_SIZE
);
469 f
->buf_offset
+= len
;
470 } else if (len
!= -EAGAIN
)
474 int qemu_fclose(QEMUFile
*f
)
479 ret
= f
->close(f
->opaque
);
484 void qemu_file_put_notify(QEMUFile
*f
)
486 f
->put_buffer(f
->opaque
, NULL
, 0, 0);
489 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
493 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
495 "Attempted to write to buffer while read buffer is not empty\n");
499 while (!f
->has_error
&& size
> 0) {
500 l
= IO_BUF_SIZE
- f
->buf_index
;
503 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
508 if (f
->buf_index
>= IO_BUF_SIZE
)
513 void qemu_put_byte(QEMUFile
*f
, int v
)
515 if (!f
->has_error
&& f
->is_write
== 0 && f
->buf_index
> 0) {
517 "Attempted to write to buffer while read buffer is not empty\n");
521 f
->buf
[f
->buf_index
++] = v
;
523 if (f
->buf_index
>= IO_BUF_SIZE
)
527 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size1
)
536 l
= f
->buf_size
- f
->buf_index
;
539 l
= f
->buf_size
- f
->buf_index
;
545 memcpy(buf
, f
->buf
+ f
->buf_index
, l
);
553 static int qemu_peek_byte(QEMUFile
*f
)
558 if (f
->buf_index
>= f
->buf_size
) {
560 if (f
->buf_index
>= f
->buf_size
)
563 return f
->buf
[f
->buf_index
];
566 int qemu_get_byte(QEMUFile
*f
)
571 if (f
->buf_index
>= f
->buf_size
) {
573 if (f
->buf_index
>= f
->buf_size
)
576 return f
->buf
[f
->buf_index
++];
579 int64_t qemu_ftell(QEMUFile
*f
)
581 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
584 int64_t qemu_fseek(QEMUFile
*f
, int64_t pos
, int whence
)
586 if (whence
== SEEK_SET
) {
588 } else if (whence
== SEEK_CUR
) {
589 pos
+= qemu_ftell(f
);
591 /* SEEK_END not supported */
605 int qemu_file_rate_limit(QEMUFile
*f
)
608 return f
->rate_limit(f
->opaque
);
613 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
615 if (f
->get_rate_limit
)
616 return f
->get_rate_limit(f
->opaque
);
621 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
623 /* any failed or completed migration keeps its state to allow probing of
624 * migration data, but has no associated file anymore */
625 if (f
&& f
->set_rate_limit
)
626 return f
->set_rate_limit(f
->opaque
, new_rate
);
631 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
633 qemu_put_byte(f
, v
>> 8);
637 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
639 qemu_put_byte(f
, v
>> 24);
640 qemu_put_byte(f
, v
>> 16);
641 qemu_put_byte(f
, v
>> 8);
645 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
647 qemu_put_be32(f
, v
>> 32);
651 unsigned int qemu_get_be16(QEMUFile
*f
)
654 v
= qemu_get_byte(f
) << 8;
655 v
|= qemu_get_byte(f
);
659 unsigned int qemu_get_be32(QEMUFile
*f
)
662 v
= qemu_get_byte(f
) << 24;
663 v
|= qemu_get_byte(f
) << 16;
664 v
|= qemu_get_byte(f
) << 8;
665 v
|= qemu_get_byte(f
);
669 uint64_t qemu_get_be64(QEMUFile
*f
)
672 v
= (uint64_t)qemu_get_be32(f
) << 32;
673 v
|= qemu_get_be32(f
);
679 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
682 *v
= qemu_get_byte(f
);
686 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
689 qemu_put_byte(f
, *v
);
692 const VMStateInfo vmstate_info_bool
= {
700 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
707 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
713 const VMStateInfo vmstate_info_int8
= {
721 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
724 qemu_get_sbe16s(f
, v
);
728 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
731 qemu_put_sbe16s(f
, v
);
734 const VMStateInfo vmstate_info_int16
= {
742 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
745 qemu_get_sbe32s(f
, v
);
749 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
752 qemu_put_sbe32s(f
, v
);
755 const VMStateInfo vmstate_info_int32
= {
761 /* 32 bit int. See that the received value is the same than the one
764 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
768 qemu_get_sbe32s(f
, &v2
);
775 const VMStateInfo vmstate_info_int32_equal
= {
776 .name
= "int32 equal",
777 .get
= get_int32_equal
,
781 /* 32 bit int. See that the received value is the less or the same
782 than the one in the field */
784 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
788 qemu_get_sbe32s(f
, &new);
795 const VMStateInfo vmstate_info_int32_le
= {
796 .name
= "int32 equal",
803 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
806 qemu_get_sbe64s(f
, v
);
810 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
813 qemu_put_sbe64s(f
, v
);
816 const VMStateInfo vmstate_info_int64
= {
822 /* 8 bit unsigned int */
824 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
831 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
837 const VMStateInfo vmstate_info_uint8
= {
843 /* 16 bit unsigned int */
845 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
848 qemu_get_be16s(f
, v
);
852 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
855 qemu_put_be16s(f
, v
);
858 const VMStateInfo vmstate_info_uint16
= {
864 /* 32 bit unsigned int */
866 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
869 qemu_get_be32s(f
, v
);
873 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
876 qemu_put_be32s(f
, v
);
879 const VMStateInfo vmstate_info_uint32
= {
885 /* 32 bit uint. See that the received value is the same than the one
888 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
892 qemu_get_be32s(f
, &v2
);
900 const VMStateInfo vmstate_info_uint32_equal
= {
901 .name
= "uint32 equal",
902 .get
= get_uint32_equal
,
906 /* 64 bit unsigned int */
908 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
911 qemu_get_be64s(f
, v
);
915 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
918 qemu_put_be64s(f
, v
);
921 const VMStateInfo vmstate_info_uint64
= {
927 /* 8 bit int. See that the received value is the same than the one
930 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
941 const VMStateInfo vmstate_info_uint8_equal
= {
942 .name
= "uint8 equal",
943 .get
= get_uint8_equal
,
947 /* 16 bit unsigned int int. See that the received value is the same than the one
950 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
954 qemu_get_be16s(f
, &v2
);
961 const VMStateInfo vmstate_info_uint16_equal
= {
962 .name
= "uint16 equal",
963 .get
= get_uint16_equal
,
969 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
972 qemu_get_timer(f
, v
);
976 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
979 qemu_put_timer(f
, v
);
982 const VMStateInfo vmstate_info_timer
= {
988 /* uint8_t buffers */
990 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
993 qemu_get_buffer(f
, v
, size
);
997 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1000 qemu_put_buffer(f
, v
, size
);
1003 const VMStateInfo vmstate_info_buffer
= {
1009 /* unused buffers: space that was used for some fields that are
1010 not useful anymore */
1012 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1018 block_len
= MIN(sizeof(buf
), size
);
1020 qemu_get_buffer(f
, buf
, block_len
);
1025 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1027 static const uint8_t buf
[1024];
1031 block_len
= MIN(sizeof(buf
), size
);
1033 qemu_put_buffer(f
, buf
, block_len
);
1037 const VMStateInfo vmstate_info_unused_buffer
= {
1038 .name
= "unused_buffer",
1039 .get
= get_unused_buffer
,
1040 .put
= put_unused_buffer
,
1043 typedef struct CompatEntry
{
1048 typedef struct SaveStateEntry
{
1049 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1055 SaveSetParamsHandler
*set_params
;
1056 SaveLiveStateHandler
*save_live_state
;
1057 SaveStateHandler
*save_state
;
1058 LoadStateHandler
*load_state
;
1059 const VMStateDescription
*vmsd
;
1061 CompatEntry
*compat
;
1066 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1067 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1068 static int global_section_id
;
1070 static int calculate_new_instance_id(const char *idstr
)
1073 int instance_id
= 0;
1075 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1076 if (strcmp(idstr
, se
->idstr
) == 0
1077 && instance_id
<= se
->instance_id
) {
1078 instance_id
= se
->instance_id
+ 1;
1084 static int calculate_compat_instance_id(const char *idstr
)
1087 int instance_id
= 0;
1089 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1093 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1094 && instance_id
<= se
->compat
->instance_id
) {
1095 instance_id
= se
->compat
->instance_id
+ 1;
1101 /* TODO: Individual devices generally have very little idea about the rest
1102 of the system, so instance_id should be removed/replaced.
1103 Meanwhile pass -1 as instance_id if you do not already have a clearly
1104 distinguishing id for all instances of your device class. */
1105 int register_savevm_live(DeviceState
*dev
,
1109 SaveSetParamsHandler
*set_params
,
1110 SaveLiveStateHandler
*save_live_state
,
1111 SaveStateHandler
*save_state
,
1112 LoadStateHandler
*load_state
,
1117 se
= qemu_mallocz(sizeof(SaveStateEntry
));
1118 se
->version_id
= version_id
;
1119 se
->section_id
= global_section_id
++;
1120 se
->set_params
= set_params
;
1121 se
->save_live_state
= save_live_state
;
1122 se
->save_state
= save_state
;
1123 se
->load_state
= load_state
;
1124 se
->opaque
= opaque
;
1128 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1129 char *id
= dev
->parent_bus
->info
->get_dev_path(dev
);
1131 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1132 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1135 se
->compat
= qemu_mallocz(sizeof(CompatEntry
));
1136 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1137 se
->compat
->instance_id
= instance_id
== -1 ?
1138 calculate_compat_instance_id(idstr
) : instance_id
;
1142 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1144 if (instance_id
== -1) {
1145 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1147 se
->instance_id
= instance_id
;
1149 assert(!se
->compat
|| se
->instance_id
== 0);
1150 /* add at the end of list */
1151 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1155 int register_savevm(DeviceState
*dev
,
1159 SaveStateHandler
*save_state
,
1160 LoadStateHandler
*load_state
,
1163 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1164 NULL
, NULL
, save_state
, load_state
, opaque
);
1167 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1169 SaveStateEntry
*se
, *new_se
;
1172 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1173 char *path
= dev
->parent_bus
->info
->get_dev_path(dev
);
1175 pstrcpy(id
, sizeof(id
), path
);
1176 pstrcat(id
, sizeof(id
), "/");
1180 pstrcat(id
, sizeof(id
), idstr
);
1182 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1183 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1184 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1186 qemu_free(se
->compat
);
1193 /* mark a device as not to be migrated, that is the device should be
1194 unplugged before migration */
1195 void register_device_unmigratable(DeviceState
*dev
, const char *idstr
,
1201 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1202 char *path
= dev
->parent_bus
->info
->get_dev_path(dev
);
1204 pstrcpy(id
, sizeof(id
), path
);
1205 pstrcat(id
, sizeof(id
), "/");
1209 pstrcat(id
, sizeof(id
), idstr
);
1211 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1212 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1218 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1219 const VMStateDescription
*vmsd
,
1220 void *opaque
, int alias_id
,
1221 int required_for_version
)
1225 /* If this triggers, alias support can be dropped for the vmsd. */
1226 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1228 se
= qemu_mallocz(sizeof(SaveStateEntry
));
1229 se
->version_id
= vmsd
->version_id
;
1230 se
->section_id
= global_section_id
++;
1231 se
->save_live_state
= NULL
;
1232 se
->save_state
= NULL
;
1233 se
->load_state
= NULL
;
1234 se
->opaque
= opaque
;
1236 se
->alias_id
= alias_id
;
1238 if (dev
&& dev
->parent_bus
&& dev
->parent_bus
->info
->get_dev_path
) {
1239 char *id
= dev
->parent_bus
->info
->get_dev_path(dev
);
1241 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1242 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1245 se
->compat
= qemu_mallocz(sizeof(CompatEntry
));
1246 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1247 se
->compat
->instance_id
= instance_id
== -1 ?
1248 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1252 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1254 if (instance_id
== -1) {
1255 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1257 se
->instance_id
= instance_id
;
1259 assert(!se
->compat
|| se
->instance_id
== 0);
1260 /* add at the end of list */
1261 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1265 int vmstate_register(DeviceState
*dev
, int instance_id
,
1266 const VMStateDescription
*vmsd
, void *opaque
)
1268 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1272 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1275 SaveStateEntry
*se
, *new_se
;
1277 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1278 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1279 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1281 qemu_free(se
->compat
);
1288 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1290 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1293 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1294 void *opaque
, int version_id
)
1296 VMStateField
*field
= vmsd
->fields
;
1299 if (version_id
> vmsd
->version_id
) {
1302 if (version_id
< vmsd
->minimum_version_id_old
) {
1305 if (version_id
< vmsd
->minimum_version_id
) {
1306 return vmsd
->load_state_old(f
, opaque
, version_id
);
1308 if (vmsd
->pre_load
) {
1309 int ret
= vmsd
->pre_load(opaque
);
1313 while(field
->name
) {
1314 if ((field
->field_exists
&&
1315 field
->field_exists(opaque
, version_id
)) ||
1316 (!field
->field_exists
&&
1317 field
->version_id
<= version_id
)) {
1318 void *base_addr
= opaque
+ field
->offset
;
1320 int size
= field
->size
;
1322 if (field
->flags
& VMS_VBUFFER
) {
1323 size
= *(int32_t *)(opaque
+field
->size_offset
);
1324 if (field
->flags
& VMS_MULTIPLY
) {
1325 size
*= field
->size
;
1328 if (field
->flags
& VMS_ARRAY
) {
1329 n_elems
= field
->num
;
1330 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1331 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1332 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1333 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1334 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1335 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1336 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1337 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1339 if (field
->flags
& VMS_POINTER
) {
1340 base_addr
= *(void **)base_addr
+ field
->start
;
1342 for (i
= 0; i
< n_elems
; i
++) {
1343 void *addr
= base_addr
+ size
* i
;
1345 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1346 addr
= *(void **)addr
;
1348 if (field
->flags
& VMS_STRUCT
) {
1349 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1351 ret
= field
->info
->get(f
, addr
, size
);
1361 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1365 if (vmsd
->post_load
) {
1366 return vmsd
->post_load(opaque
, version_id
);
1371 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1374 VMStateField
*field
= vmsd
->fields
;
1376 if (vmsd
->pre_save
) {
1377 vmsd
->pre_save(opaque
);
1379 while(field
->name
) {
1380 if (!field
->field_exists
||
1381 field
->field_exists(opaque
, vmsd
->version_id
)) {
1382 void *base_addr
= opaque
+ field
->offset
;
1384 int size
= field
->size
;
1386 if (field
->flags
& VMS_VBUFFER
) {
1387 size
= *(int32_t *)(opaque
+field
->size_offset
);
1388 if (field
->flags
& VMS_MULTIPLY
) {
1389 size
*= field
->size
;
1392 if (field
->flags
& VMS_ARRAY
) {
1393 n_elems
= field
->num
;
1394 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1395 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1396 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1397 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1398 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1399 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1401 if (field
->flags
& VMS_POINTER
) {
1402 base_addr
= *(void **)base_addr
+ field
->start
;
1404 for (i
= 0; i
< n_elems
; i
++) {
1405 void *addr
= base_addr
+ size
* i
;
1407 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1408 addr
= *(void **)addr
;
1410 if (field
->flags
& VMS_STRUCT
) {
1411 vmstate_save_state(f
, field
->vmsd
, addr
);
1413 field
->info
->put(f
, addr
, size
);
1419 vmstate_subsection_save(f
, vmsd
, opaque
);
1422 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1424 if (!se
->vmsd
) { /* Old style */
1425 return se
->load_state(f
, se
->opaque
, version_id
);
1427 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1430 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1432 if (!se
->vmsd
) { /* Old style */
1433 se
->save_state(f
, se
->opaque
);
1436 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1439 #define QEMU_VM_FILE_MAGIC 0x5145564d
1440 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1441 #define QEMU_VM_FILE_VERSION 0x00000003
1443 #define QEMU_VM_EOF 0x00
1444 #define QEMU_VM_SECTION_START 0x01
1445 #define QEMU_VM_SECTION_PART 0x02
1446 #define QEMU_VM_SECTION_END 0x03
1447 #define QEMU_VM_SECTION_FULL 0x04
1448 #define QEMU_VM_SUBSECTION 0x05
1450 bool qemu_savevm_state_blocked(Monitor
*mon
)
1454 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1455 if (se
->no_migrate
) {
1456 monitor_printf(mon
, "state blocked by non-migratable device '%s'\n",
1464 int qemu_savevm_state_begin(Monitor
*mon
, QEMUFile
*f
, int blk_enable
,
1469 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1470 if(se
->set_params
== NULL
) {
1473 se
->set_params(blk_enable
, shared
, se
->opaque
);
1476 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1477 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1479 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1482 if (se
->save_live_state
== NULL
)
1486 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1487 qemu_put_be32(f
, se
->section_id
);
1490 len
= strlen(se
->idstr
);
1491 qemu_put_byte(f
, len
);
1492 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1494 qemu_put_be32(f
, se
->instance_id
);
1495 qemu_put_be32(f
, se
->version_id
);
1497 se
->save_live_state(mon
, f
, QEMU_VM_SECTION_START
, se
->opaque
);
1500 if (qemu_file_has_error(f
)) {
1501 qemu_savevm_state_cancel(mon
, f
);
1508 int qemu_savevm_state_iterate(Monitor
*mon
, QEMUFile
*f
)
1513 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1514 if (se
->save_live_state
== NULL
)
1518 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1519 qemu_put_be32(f
, se
->section_id
);
1521 ret
= se
->save_live_state(mon
, f
, QEMU_VM_SECTION_PART
, se
->opaque
);
1523 /* Do not proceed to the next vmstate before this one reported
1524 completion of the current stage. This serializes the migration
1525 and reduces the probability that a faster changing state is
1526 synchronized over and over again. */
1534 if (qemu_file_has_error(f
)) {
1535 qemu_savevm_state_cancel(mon
, f
);
1542 int qemu_savevm_state_complete(Monitor
*mon
, QEMUFile
*f
)
1546 cpu_synchronize_all_states();
1548 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1549 if (se
->save_live_state
== NULL
)
1553 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1554 qemu_put_be32(f
, se
->section_id
);
1556 se
->save_live_state(mon
, f
, QEMU_VM_SECTION_END
, se
->opaque
);
1559 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1562 if (se
->save_state
== NULL
&& se
->vmsd
== NULL
)
1566 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1567 qemu_put_be32(f
, se
->section_id
);
1570 len
= strlen(se
->idstr
);
1571 qemu_put_byte(f
, len
);
1572 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1574 qemu_put_be32(f
, se
->instance_id
);
1575 qemu_put_be32(f
, se
->version_id
);
1577 vmstate_save(f
, se
);
1580 qemu_put_byte(f
, QEMU_VM_EOF
);
1582 if (qemu_file_has_error(f
))
1588 void qemu_savevm_state_cancel(Monitor
*mon
, QEMUFile
*f
)
1592 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1593 if (se
->save_live_state
) {
1594 se
->save_live_state(mon
, f
, -1, se
->opaque
);
1599 static int qemu_savevm_state(Monitor
*mon
, QEMUFile
*f
)
1601 int saved_vm_running
;
1604 saved_vm_running
= vm_running
;
1605 vm_stop(VMSTOP_SAVEVM
);
1607 if (qemu_savevm_state_blocked(mon
)) {
1612 ret
= qemu_savevm_state_begin(mon
, f
, 0, 0);
1617 ret
= qemu_savevm_state_iterate(mon
, f
);
1622 ret
= qemu_savevm_state_complete(mon
, f
);
1625 if (qemu_file_has_error(f
))
1628 if (!ret
&& saved_vm_running
)
1634 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1638 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1639 if (!strcmp(se
->idstr
, idstr
) &&
1640 (instance_id
== se
->instance_id
||
1641 instance_id
== se
->alias_id
))
1643 /* Migrating from an older version? */
1644 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1645 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1646 (instance_id
== se
->compat
->instance_id
||
1647 instance_id
== se
->alias_id
))
1654 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1656 while(sub
&& sub
->needed
) {
1657 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1665 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1668 const VMStateSubsection
*sub
= vmsd
->subsections
;
1670 if (!sub
|| !sub
->needed
) {
1674 while (qemu_peek_byte(f
) == QEMU_VM_SUBSECTION
) {
1677 uint8_t version_id
, len
;
1678 const VMStateDescription
*sub_vmsd
;
1680 qemu_get_byte(f
); /* subsection */
1681 len
= qemu_get_byte(f
);
1682 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1684 version_id
= qemu_get_be32(f
);
1686 sub_vmsd
= vmstate_get_subsection(sub
, idstr
);
1687 if (sub_vmsd
== NULL
) {
1690 assert(!sub_vmsd
->subsections
);
1691 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1699 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1702 const VMStateSubsection
*sub
= vmsd
->subsections
;
1704 while (sub
&& sub
->needed
) {
1705 if (sub
->needed(opaque
)) {
1706 const VMStateDescription
*vmsd
= sub
->vmsd
;
1709 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1710 len
= strlen(vmsd
->name
);
1711 qemu_put_byte(f
, len
);
1712 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1713 qemu_put_be32(f
, vmsd
->version_id
);
1714 assert(!vmsd
->subsections
);
1715 vmstate_save_state(f
, vmsd
, opaque
);
1721 typedef struct LoadStateEntry
{
1722 QLIST_ENTRY(LoadStateEntry
) entry
;
1728 int qemu_loadvm_state(QEMUFile
*f
)
1730 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1731 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1732 LoadStateEntry
*le
, *new_le
;
1733 uint8_t section_type
;
1737 if (qemu_savevm_state_blocked(default_mon
)) {
1741 v
= qemu_get_be32(f
);
1742 if (v
!= QEMU_VM_FILE_MAGIC
)
1745 v
= qemu_get_be32(f
);
1746 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1747 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1750 if (v
!= QEMU_VM_FILE_VERSION
)
1753 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1754 uint32_t instance_id
, version_id
, section_id
;
1759 switch (section_type
) {
1760 case QEMU_VM_SECTION_START
:
1761 case QEMU_VM_SECTION_FULL
:
1762 /* Read section start */
1763 section_id
= qemu_get_be32(f
);
1764 len
= qemu_get_byte(f
);
1765 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1767 instance_id
= qemu_get_be32(f
);
1768 version_id
= qemu_get_be32(f
);
1770 /* Find savevm section */
1771 se
= find_se(idstr
, instance_id
);
1773 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1778 /* Validate version */
1779 if (version_id
> se
->version_id
) {
1780 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1781 version_id
, idstr
, se
->version_id
);
1787 le
= qemu_mallocz(sizeof(*le
));
1790 le
->section_id
= section_id
;
1791 le
->version_id
= version_id
;
1792 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
1794 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1796 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1797 instance_id
, idstr
);
1801 case QEMU_VM_SECTION_PART
:
1802 case QEMU_VM_SECTION_END
:
1803 section_id
= qemu_get_be32(f
);
1805 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
1806 if (le
->section_id
== section_id
) {
1811 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
1816 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1818 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
1824 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
1830 cpu_synchronize_all_post_init();
1835 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
1836 QLIST_REMOVE(le
, entry
);
1840 if (qemu_file_has_error(f
))
1846 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
1849 QEMUSnapshotInfo
*sn_tab
, *sn
;
1853 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
1856 for(i
= 0; i
< nb_sns
; i
++) {
1858 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
1869 * Deletes snapshots of a given name in all opened images.
1871 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
1873 BlockDriverState
*bs
;
1874 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
1878 while ((bs
= bdrv_next(bs
))) {
1879 if (bdrv_can_snapshot(bs
) &&
1880 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
1882 ret
= bdrv_snapshot_delete(bs
, name
);
1885 "Error while deleting snapshot on '%s'\n",
1886 bdrv_get_device_name(bs
));
1895 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
1897 BlockDriverState
*bs
, *bs1
;
1898 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
1901 int saved_vm_running
;
1902 uint32_t vm_state_size
;
1910 const char *name
= qdict_get_try_str(qdict
, "name");
1912 /* Verify if there is a device that doesn't support snapshots and is writable */
1914 while ((bs
= bdrv_next(bs
))) {
1916 if (bdrv_is_removable(bs
) || bdrv_is_read_only(bs
)) {
1920 if (!bdrv_can_snapshot(bs
)) {
1921 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
1922 bdrv_get_device_name(bs
));
1927 bs
= bdrv_snapshots();
1929 monitor_printf(mon
, "No block device can accept snapshots\n");
1933 saved_vm_running
= vm_running
;
1934 vm_stop(VMSTOP_SAVEVM
);
1936 memset(sn
, 0, sizeof(*sn
));
1938 /* fill auxiliary fields */
1941 sn
->date_sec
= tb
.time
;
1942 sn
->date_nsec
= tb
.millitm
* 1000000;
1944 gettimeofday(&tv
, NULL
);
1945 sn
->date_sec
= tv
.tv_sec
;
1946 sn
->date_nsec
= tv
.tv_usec
* 1000;
1948 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
1951 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
1953 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
1954 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
1956 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1960 ptm
= localtime(&tb
.time
);
1961 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", ptm
);
1963 /* cast below needed for OpenBSD where tv_sec is still 'long' */
1964 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
1965 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
1969 /* Delete old snapshots of the same name */
1970 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
1974 /* save the VM state */
1975 f
= qemu_fopen_bdrv(bs
, 1);
1977 monitor_printf(mon
, "Could not open VM state file\n");
1980 ret
= qemu_savevm_state(mon
, f
);
1981 vm_state_size
= qemu_ftell(f
);
1984 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
1988 /* create the snapshots */
1991 while ((bs1
= bdrv_next(bs1
))) {
1992 if (bdrv_can_snapshot(bs1
)) {
1993 /* Write VM state size only to the image that contains the state */
1994 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
1995 ret
= bdrv_snapshot_create(bs1
, sn
);
1997 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
1998 bdrv_get_device_name(bs1
));
2004 if (saved_vm_running
)
2008 int load_vmstate(const char *name
)
2010 BlockDriverState
*bs
, *bs_vm_state
;
2011 QEMUSnapshotInfo sn
;
2015 bs_vm_state
= bdrv_snapshots();
2017 error_report("No block device supports snapshots");
2021 /* Don't even try to load empty VM states */
2022 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2025 } else if (sn
.vm_state_size
== 0) {
2026 error_report("This is a disk-only snapshot. Revert to it offline "
2031 /* Verify if there is any device that doesn't support snapshots and is
2032 writable and check if the requested snapshot is available too. */
2034 while ((bs
= bdrv_next(bs
))) {
2036 if (bdrv_is_removable(bs
) || bdrv_is_read_only(bs
)) {
2040 if (!bdrv_can_snapshot(bs
)) {
2041 error_report("Device '%s' is writable but does not support snapshots.",
2042 bdrv_get_device_name(bs
));
2046 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2048 error_report("Device '%s' does not have the requested snapshot '%s'",
2049 bdrv_get_device_name(bs
), name
);
2054 /* Flush all IO requests so they don't interfere with the new state. */
2058 while ((bs
= bdrv_next(bs
))) {
2059 if (bdrv_can_snapshot(bs
)) {
2060 ret
= bdrv_snapshot_goto(bs
, name
);
2062 error_report("Error %d while activating snapshot '%s' on '%s'",
2063 ret
, name
, bdrv_get_device_name(bs
));
2069 /* restore the VM state */
2070 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2072 error_report("Could not open VM state file");
2076 qemu_system_reset(VMRESET_SILENT
);
2077 ret
= qemu_loadvm_state(f
);
2081 error_report("Error %d while loading VM state", ret
);
2088 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2090 BlockDriverState
*bs
, *bs1
;
2092 const char *name
= qdict_get_str(qdict
, "name");
2094 bs
= bdrv_snapshots();
2096 monitor_printf(mon
, "No block device supports snapshots\n");
2101 while ((bs1
= bdrv_next(bs1
))) {
2102 if (bdrv_can_snapshot(bs1
)) {
2103 ret
= bdrv_snapshot_delete(bs1
, name
);
2105 if (ret
== -ENOTSUP
)
2107 "Snapshots not supported on device '%s'\n",
2108 bdrv_get_device_name(bs1
));
2110 monitor_printf(mon
, "Error %d while deleting snapshot on "
2111 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2117 void do_info_snapshots(Monitor
*mon
)
2119 BlockDriverState
*bs
, *bs1
;
2120 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2121 int nb_sns
, i
, ret
, available
;
2123 int *available_snapshots
;
2126 bs
= bdrv_snapshots();
2128 monitor_printf(mon
, "No available block device supports snapshots\n");
2132 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2134 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2139 monitor_printf(mon
, "There is no snapshot available.\n");
2143 available_snapshots
= qemu_mallocz(sizeof(int) * nb_sns
);
2145 for (i
= 0; i
< nb_sns
; i
++) {
2150 while ((bs1
= bdrv_next(bs1
))) {
2151 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2152 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2161 available_snapshots
[total
] = i
;
2167 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2168 for (i
= 0; i
< total
; i
++) {
2169 sn
= &sn_tab
[available_snapshots
[i
]];
2170 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2173 monitor_printf(mon
, "There is no suitable snapshot available\n");
2177 qemu_free(available_snapshots
);