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
25 #include "config-host.h"
26 #include "qemu-common.h"
30 #include "monitor/monitor.h"
31 #include "sysemu/sysemu.h"
32 #include "qemu/timer.h"
33 #include "audio/audio.h"
34 #include "migration/migration.h"
35 #include "qemu/sockets.h"
36 #include "qemu/queue.h"
37 #include "sysemu/cpus.h"
38 #include "exec/memory.h"
39 #include "qmp-commands.h"
41 #include "qemu/bitops.h"
43 #define SELF_ANNOUNCE_ROUNDS 5
46 #define ETH_P_RARP 0x8035
48 #define ARP_HTYPE_ETH 0x0001
49 #define ARP_PTYPE_IP 0x0800
50 #define ARP_OP_REQUEST_REV 0x3
52 static int announce_self_create(uint8_t *buf
,
55 /* Ethernet header. */
56 memset(buf
, 0xff, 6); /* destination MAC addr */
57 memcpy(buf
+ 6, mac_addr
, 6); /* source MAC addr */
58 *(uint16_t *)(buf
+ 12) = htons(ETH_P_RARP
); /* ethertype */
61 *(uint16_t *)(buf
+ 14) = htons(ARP_HTYPE_ETH
); /* hardware addr space */
62 *(uint16_t *)(buf
+ 16) = htons(ARP_PTYPE_IP
); /* protocol addr space */
63 *(buf
+ 18) = 6; /* hardware addr length (ethernet) */
64 *(buf
+ 19) = 4; /* protocol addr length (IPv4) */
65 *(uint16_t *)(buf
+ 20) = htons(ARP_OP_REQUEST_REV
); /* opcode */
66 memcpy(buf
+ 22, mac_addr
, 6); /* source hw addr */
67 memset(buf
+ 28, 0x00, 4); /* source protocol addr */
68 memcpy(buf
+ 32, mac_addr
, 6); /* target hw addr */
69 memset(buf
+ 38, 0x00, 4); /* target protocol addr */
71 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
72 memset(buf
+ 42, 0x00, 18);
74 return 60; /* len (FCS will be added by hardware) */
77 static void qemu_announce_self_iter(NICState
*nic
, void *opaque
)
82 len
= announce_self_create(buf
, nic
->conf
->macaddr
.a
);
84 qemu_send_packet_raw(qemu_get_queue(nic
), buf
, len
);
88 static void qemu_announce_self_once(void *opaque
)
90 static int count
= SELF_ANNOUNCE_ROUNDS
;
91 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
93 qemu_foreach_nic(qemu_announce_self_iter
, NULL
);
96 /* delay 50ms, 150ms, 250ms, ... */
97 qemu_mod_timer(timer
, qemu_get_clock_ms(rt_clock
) +
98 50 + (SELF_ANNOUNCE_ROUNDS
- count
- 1) * 100);
100 qemu_del_timer(timer
);
101 qemu_free_timer(timer
);
105 void qemu_announce_self(void)
107 static QEMUTimer
*timer
;
108 timer
= qemu_new_timer_ms(rt_clock
, qemu_announce_self_once
, &timer
);
109 qemu_announce_self_once(&timer
);
112 /***********************************************************/
113 /* savevm/loadvm support */
115 #define IO_BUF_SIZE 32768
118 const QEMUFileOps
*ops
;
122 int64_t buf_offset
; /* start of buffer when writing, end of buffer
125 int buf_size
; /* 0 when writing */
126 uint8_t buf
[IO_BUF_SIZE
];
131 typedef struct QEMUFileStdio
137 typedef struct QEMUFileSocket
148 static void fd_coroutine_enter(void *opaque
)
150 FDYieldUntilData
*data
= opaque
;
151 qemu_set_fd_handler(data
->fd
, NULL
, NULL
, NULL
);
152 qemu_coroutine_enter(data
->co
, NULL
);
156 * Yield until a file descriptor becomes readable
158 * Note that this function clobbers the handlers for the file descriptor.
160 static void coroutine_fn
yield_until_fd_readable(int fd
)
162 FDYieldUntilData data
;
164 assert(qemu_in_coroutine());
165 data
.co
= qemu_coroutine_self();
167 qemu_set_fd_handler(fd
, fd_coroutine_enter
, NULL
, &data
);
168 qemu_coroutine_yield();
171 static int socket_get_fd(void *opaque
)
173 QEMUFileSocket
*s
= opaque
;
178 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
180 QEMUFileSocket
*s
= opaque
;
184 len
= qemu_recv(s
->fd
, buf
, size
, 0);
188 if (socket_error() == EAGAIN
) {
189 yield_until_fd_readable(s
->fd
);
190 } else if (socket_error() != EINTR
) {
196 len
= -socket_error();
201 static int socket_close(void *opaque
)
203 QEMUFileSocket
*s
= opaque
;
209 static int stdio_get_fd(void *opaque
)
211 QEMUFileStdio
*s
= opaque
;
213 return fileno(s
->stdio_file
);
216 static int stdio_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
218 QEMUFileStdio
*s
= opaque
;
219 return fwrite(buf
, 1, size
, s
->stdio_file
);
222 static int stdio_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
224 QEMUFileStdio
*s
= opaque
;
225 FILE *fp
= s
->stdio_file
;
230 bytes
= fread(buf
, 1, size
, fp
);
231 if (bytes
!= 0 || !ferror(fp
)) {
234 if (errno
== EAGAIN
) {
235 yield_until_fd_readable(fileno(fp
));
236 } else if (errno
!= EINTR
) {
243 static int stdio_pclose(void *opaque
)
245 QEMUFileStdio
*s
= opaque
;
247 ret
= pclose(s
->stdio_file
);
255 static int stdio_fclose(void *opaque
)
257 QEMUFileStdio
*s
= opaque
;
259 if (fclose(s
->stdio_file
) == EOF
) {
266 static const QEMUFileOps stdio_pipe_read_ops
= {
267 .get_fd
= stdio_get_fd
,
268 .get_buffer
= stdio_get_buffer
,
269 .close
= stdio_pclose
272 static const QEMUFileOps stdio_pipe_write_ops
= {
273 .get_fd
= stdio_get_fd
,
274 .put_buffer
= stdio_put_buffer
,
275 .close
= stdio_pclose
278 QEMUFile
*qemu_popen(FILE *stdio_file
, const char *mode
)
282 if (stdio_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
283 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
287 s
= g_malloc0(sizeof(QEMUFileStdio
));
289 s
->stdio_file
= stdio_file
;
292 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_read_ops
);
294 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_write_ops
);
299 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
303 popen_file
= popen(command
, mode
);
304 if(popen_file
== NULL
) {
308 return qemu_popen(popen_file
, mode
);
311 static const QEMUFileOps stdio_file_read_ops
= {
312 .get_fd
= stdio_get_fd
,
313 .get_buffer
= stdio_get_buffer
,
314 .close
= stdio_fclose
317 static const QEMUFileOps stdio_file_write_ops
= {
318 .get_fd
= stdio_get_fd
,
319 .put_buffer
= stdio_put_buffer
,
320 .close
= stdio_fclose
323 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
328 (mode
[0] != 'r' && mode
[0] != 'w') ||
329 mode
[1] != 'b' || mode
[2] != 0) {
330 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
334 s
= g_malloc0(sizeof(QEMUFileStdio
));
335 s
->stdio_file
= fdopen(fd
, mode
);
340 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
342 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
351 static const QEMUFileOps socket_read_ops
= {
352 .get_fd
= socket_get_fd
,
353 .get_buffer
= socket_get_buffer
,
354 .close
= socket_close
357 QEMUFile
*qemu_fopen_socket(int fd
)
359 QEMUFileSocket
*s
= g_malloc0(sizeof(QEMUFileSocket
));
362 s
->file
= qemu_fopen_ops(s
, &socket_read_ops
);
366 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
371 (mode
[0] != 'r' && mode
[0] != 'w') ||
372 mode
[1] != 'b' || mode
[2] != 0) {
373 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
377 s
= g_malloc0(sizeof(QEMUFileStdio
));
379 s
->stdio_file
= fopen(filename
, mode
);
384 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
386 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
394 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
395 int64_t pos
, int size
)
397 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
401 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
403 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
406 static int bdrv_fclose(void *opaque
)
408 return bdrv_flush(opaque
);
411 static const QEMUFileOps bdrv_read_ops
= {
412 .get_buffer
= block_get_buffer
,
416 static const QEMUFileOps bdrv_write_ops
= {
417 .put_buffer
= block_put_buffer
,
421 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
424 return qemu_fopen_ops(bs
, &bdrv_write_ops
);
425 return qemu_fopen_ops(bs
, &bdrv_read_ops
);
428 QEMUFile
*qemu_fopen_ops(void *opaque
, const QEMUFileOps
*ops
)
432 f
= g_malloc0(sizeof(QEMUFile
));
441 int qemu_file_get_error(QEMUFile
*f
)
443 return f
->last_error
;
446 static void qemu_file_set_error(QEMUFile
*f
, int ret
)
448 if (f
->last_error
== 0) {
453 /** Flushes QEMUFile buffer
456 static int qemu_fflush(QEMUFile
*f
)
460 if (!f
->ops
->put_buffer
)
463 if (f
->is_write
&& f
->buf_index
> 0) {
464 ret
= f
->ops
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
466 f
->buf_offset
+= f
->buf_index
;
473 static void qemu_fill_buffer(QEMUFile
*f
)
478 if (!f
->ops
->get_buffer
)
484 pending
= f
->buf_size
- f
->buf_index
;
486 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
489 f
->buf_size
= pending
;
491 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
492 IO_BUF_SIZE
- pending
);
495 f
->buf_offset
+= len
;
496 } else if (len
== 0) {
497 qemu_file_set_error(f
, -EIO
);
498 } else if (len
!= -EAGAIN
)
499 qemu_file_set_error(f
, len
);
502 int qemu_get_fd(QEMUFile
*f
)
504 if (f
->ops
->get_fd
) {
505 return f
->ops
->get_fd(f
->opaque
);
512 * Returns negative error value if any error happened on previous operations or
513 * while closing the file. Returns 0 or positive number on success.
515 * The meaning of return value on success depends on the specific backend
518 int qemu_fclose(QEMUFile
*f
)
521 ret
= qemu_fflush(f
);
524 int ret2
= f
->ops
->close(f
->opaque
);
529 /* If any error was spotted before closing, we should report it
530 * instead of the close() return value.
539 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
547 if (f
->is_write
== 0 && f
->buf_index
> 0) {
549 "Attempted to write to buffer while read buffer is not empty\n");
554 l
= IO_BUF_SIZE
- f
->buf_index
;
557 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
562 if (f
->buf_index
>= IO_BUF_SIZE
) {
563 int ret
= qemu_fflush(f
);
565 qemu_file_set_error(f
, ret
);
572 void qemu_put_byte(QEMUFile
*f
, int v
)
578 if (f
->is_write
== 0 && f
->buf_index
> 0) {
580 "Attempted to write to buffer while read buffer is not empty\n");
584 f
->buf
[f
->buf_index
++] = v
;
586 if (f
->buf_index
>= IO_BUF_SIZE
) {
587 int ret
= qemu_fflush(f
);
589 qemu_file_set_error(f
, ret
);
594 static void qemu_file_skip(QEMUFile
*f
, int size
)
596 if (f
->buf_index
+ size
<= f
->buf_size
) {
597 f
->buf_index
+= size
;
601 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
610 index
= f
->buf_index
+ offset
;
611 pending
= f
->buf_size
- index
;
612 if (pending
< size
) {
614 index
= f
->buf_index
+ offset
;
615 pending
= f
->buf_size
- index
;
621 if (size
> pending
) {
625 memcpy(buf
, f
->buf
+ index
, size
);
629 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
634 while (pending
> 0) {
637 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
641 qemu_file_skip(f
, res
);
649 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
651 int index
= f
->buf_index
+ offset
;
657 if (index
>= f
->buf_size
) {
659 index
= f
->buf_index
+ offset
;
660 if (index
>= f
->buf_size
) {
664 return f
->buf
[index
];
667 int qemu_get_byte(QEMUFile
*f
)
671 result
= qemu_peek_byte(f
, 0);
672 qemu_file_skip(f
, 1);
676 int64_t qemu_ftell(QEMUFile
*f
)
678 /* buf_offset excludes buffer for writing but includes it for reading */
680 return f
->buf_offset
+ f
->buf_index
;
682 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
686 int qemu_file_rate_limit(QEMUFile
*f
)
688 if (f
->ops
->rate_limit
)
689 return f
->ops
->rate_limit(f
->opaque
);
694 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
696 if (f
->ops
->get_rate_limit
)
697 return f
->ops
->get_rate_limit(f
->opaque
);
702 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
704 /* any failed or completed migration keeps its state to allow probing of
705 * migration data, but has no associated file anymore */
706 if (f
&& f
->ops
->set_rate_limit
)
707 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
712 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
714 qemu_put_byte(f
, v
>> 8);
718 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
720 qemu_put_byte(f
, v
>> 24);
721 qemu_put_byte(f
, v
>> 16);
722 qemu_put_byte(f
, v
>> 8);
726 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
728 qemu_put_be32(f
, v
>> 32);
732 unsigned int qemu_get_be16(QEMUFile
*f
)
735 v
= qemu_get_byte(f
) << 8;
736 v
|= qemu_get_byte(f
);
740 unsigned int qemu_get_be32(QEMUFile
*f
)
743 v
= qemu_get_byte(f
) << 24;
744 v
|= qemu_get_byte(f
) << 16;
745 v
|= qemu_get_byte(f
) << 8;
746 v
|= qemu_get_byte(f
);
750 uint64_t qemu_get_be64(QEMUFile
*f
)
753 v
= (uint64_t)qemu_get_be32(f
) << 32;
754 v
|= qemu_get_be32(f
);
761 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
763 uint64_t expire_time
;
765 expire_time
= qemu_timer_expire_time_ns(ts
);
766 qemu_put_be64(f
, expire_time
);
769 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
771 uint64_t expire_time
;
773 expire_time
= qemu_get_be64(f
);
774 if (expire_time
!= -1) {
775 qemu_mod_timer_ns(ts
, expire_time
);
784 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
787 *v
= qemu_get_byte(f
);
791 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
794 qemu_put_byte(f
, *v
);
797 const VMStateInfo vmstate_info_bool
= {
805 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
812 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
818 const VMStateInfo vmstate_info_int8
= {
826 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
829 qemu_get_sbe16s(f
, v
);
833 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
836 qemu_put_sbe16s(f
, v
);
839 const VMStateInfo vmstate_info_int16
= {
847 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
850 qemu_get_sbe32s(f
, v
);
854 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
857 qemu_put_sbe32s(f
, v
);
860 const VMStateInfo vmstate_info_int32
= {
866 /* 32 bit int. See that the received value is the same than the one
869 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
873 qemu_get_sbe32s(f
, &v2
);
880 const VMStateInfo vmstate_info_int32_equal
= {
881 .name
= "int32 equal",
882 .get
= get_int32_equal
,
886 /* 32 bit int. See that the received value is the less or the same
887 than the one in the field */
889 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
893 qemu_get_sbe32s(f
, &new);
900 const VMStateInfo vmstate_info_int32_le
= {
901 .name
= "int32 equal",
908 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
911 qemu_get_sbe64s(f
, v
);
915 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
918 qemu_put_sbe64s(f
, v
);
921 const VMStateInfo vmstate_info_int64
= {
927 /* 8 bit unsigned int */
929 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
936 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
942 const VMStateInfo vmstate_info_uint8
= {
948 /* 16 bit unsigned int */
950 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
953 qemu_get_be16s(f
, v
);
957 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
960 qemu_put_be16s(f
, v
);
963 const VMStateInfo vmstate_info_uint16
= {
969 /* 32 bit unsigned int */
971 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
974 qemu_get_be32s(f
, v
);
978 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
981 qemu_put_be32s(f
, v
);
984 const VMStateInfo vmstate_info_uint32
= {
990 /* 32 bit uint. See that the received value is the same than the one
993 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
997 qemu_get_be32s(f
, &v2
);
1005 const VMStateInfo vmstate_info_uint32_equal
= {
1006 .name
= "uint32 equal",
1007 .get
= get_uint32_equal
,
1011 /* 64 bit unsigned int */
1013 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1016 qemu_get_be64s(f
, v
);
1020 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1023 qemu_put_be64s(f
, v
);
1026 const VMStateInfo vmstate_info_uint64
= {
1032 /* 8 bit int. See that the received value is the same than the one
1035 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1039 qemu_get_8s(f
, &v2
);
1046 const VMStateInfo vmstate_info_uint8_equal
= {
1047 .name
= "uint8 equal",
1048 .get
= get_uint8_equal
,
1052 /* 16 bit unsigned int int. See that the received value is the same than the one
1055 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1059 qemu_get_be16s(f
, &v2
);
1066 const VMStateInfo vmstate_info_uint16_equal
= {
1067 .name
= "uint16 equal",
1068 .get
= get_uint16_equal
,
1074 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1077 qemu_get_timer(f
, v
);
1081 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1084 qemu_put_timer(f
, v
);
1087 const VMStateInfo vmstate_info_timer
= {
1093 /* uint8_t buffers */
1095 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1098 qemu_get_buffer(f
, v
, size
);
1102 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1105 qemu_put_buffer(f
, v
, size
);
1108 const VMStateInfo vmstate_info_buffer
= {
1114 /* unused buffers: space that was used for some fields that are
1115 not useful anymore */
1117 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1123 block_len
= MIN(sizeof(buf
), size
);
1125 qemu_get_buffer(f
, buf
, block_len
);
1130 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1132 static const uint8_t buf
[1024];
1136 block_len
= MIN(sizeof(buf
), size
);
1138 qemu_put_buffer(f
, buf
, block_len
);
1142 const VMStateInfo vmstate_info_unused_buffer
= {
1143 .name
= "unused_buffer",
1144 .get
= get_unused_buffer
,
1145 .put
= put_unused_buffer
,
1148 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1149 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1150 * bit words with the bits in big endian order. The in-memory format
1151 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1153 /* This is the number of 64 bit words sent over the wire */
1154 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1155 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1157 unsigned long *bmp
= pv
;
1159 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1160 uint64_t w
= qemu_get_be64(f
);
1162 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1163 bmp
[idx
++] = w
>> 32;
1169 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1171 unsigned long *bmp
= pv
;
1173 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1174 uint64_t w
= bmp
[idx
++];
1175 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1176 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1178 qemu_put_be64(f
, w
);
1182 const VMStateInfo vmstate_info_bitmap
= {
1188 typedef struct CompatEntry
{
1193 typedef struct SaveStateEntry
{
1194 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1200 SaveVMHandlers
*ops
;
1201 const VMStateDescription
*vmsd
;
1203 CompatEntry
*compat
;
1209 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1210 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1211 static int global_section_id
;
1213 static int calculate_new_instance_id(const char *idstr
)
1216 int instance_id
= 0;
1218 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1219 if (strcmp(idstr
, se
->idstr
) == 0
1220 && instance_id
<= se
->instance_id
) {
1221 instance_id
= se
->instance_id
+ 1;
1227 static int calculate_compat_instance_id(const char *idstr
)
1230 int instance_id
= 0;
1232 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1236 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1237 && instance_id
<= se
->compat
->instance_id
) {
1238 instance_id
= se
->compat
->instance_id
+ 1;
1244 /* TODO: Individual devices generally have very little idea about the rest
1245 of the system, so instance_id should be removed/replaced.
1246 Meanwhile pass -1 as instance_id if you do not already have a clearly
1247 distinguishing id for all instances of your device class. */
1248 int register_savevm_live(DeviceState
*dev
,
1252 SaveVMHandlers
*ops
,
1257 se
= g_malloc0(sizeof(SaveStateEntry
));
1258 se
->version_id
= version_id
;
1259 se
->section_id
= global_section_id
++;
1261 se
->opaque
= opaque
;
1264 /* if this is a live_savem then set is_ram */
1265 if (ops
->save_live_setup
!= NULL
) {
1270 char *id
= qdev_get_dev_path(dev
);
1272 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1273 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1276 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1277 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1278 se
->compat
->instance_id
= instance_id
== -1 ?
1279 calculate_compat_instance_id(idstr
) : instance_id
;
1283 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1285 if (instance_id
== -1) {
1286 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1288 se
->instance_id
= instance_id
;
1290 assert(!se
->compat
|| se
->instance_id
== 0);
1291 /* add at the end of list */
1292 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1296 int register_savevm(DeviceState
*dev
,
1300 SaveStateHandler
*save_state
,
1301 LoadStateHandler
*load_state
,
1304 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1305 ops
->save_state
= save_state
;
1306 ops
->load_state
= load_state
;
1307 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1311 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1313 SaveStateEntry
*se
, *new_se
;
1317 char *path
= qdev_get_dev_path(dev
);
1319 pstrcpy(id
, sizeof(id
), path
);
1320 pstrcat(id
, sizeof(id
), "/");
1324 pstrcat(id
, sizeof(id
), idstr
);
1326 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1327 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1328 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1338 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1339 const VMStateDescription
*vmsd
,
1340 void *opaque
, int alias_id
,
1341 int required_for_version
)
1345 /* If this triggers, alias support can be dropped for the vmsd. */
1346 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1348 se
= g_malloc0(sizeof(SaveStateEntry
));
1349 se
->version_id
= vmsd
->version_id
;
1350 se
->section_id
= global_section_id
++;
1351 se
->opaque
= opaque
;
1353 se
->alias_id
= alias_id
;
1354 se
->no_migrate
= vmsd
->unmigratable
;
1357 char *id
= qdev_get_dev_path(dev
);
1359 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1360 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1363 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1364 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1365 se
->compat
->instance_id
= instance_id
== -1 ?
1366 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1370 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1372 if (instance_id
== -1) {
1373 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1375 se
->instance_id
= instance_id
;
1377 assert(!se
->compat
|| se
->instance_id
== 0);
1378 /* add at the end of list */
1379 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1383 int vmstate_register(DeviceState
*dev
, int instance_id
,
1384 const VMStateDescription
*vmsd
, void *opaque
)
1386 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1390 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1393 SaveStateEntry
*se
, *new_se
;
1395 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1396 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1397 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1406 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1408 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1411 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1412 void *opaque
, int version_id
)
1414 VMStateField
*field
= vmsd
->fields
;
1417 if (version_id
> vmsd
->version_id
) {
1420 if (version_id
< vmsd
->minimum_version_id_old
) {
1423 if (version_id
< vmsd
->minimum_version_id
) {
1424 return vmsd
->load_state_old(f
, opaque
, version_id
);
1426 if (vmsd
->pre_load
) {
1427 int ret
= vmsd
->pre_load(opaque
);
1431 while(field
->name
) {
1432 if ((field
->field_exists
&&
1433 field
->field_exists(opaque
, version_id
)) ||
1434 (!field
->field_exists
&&
1435 field
->version_id
<= version_id
)) {
1436 void *base_addr
= opaque
+ field
->offset
;
1438 int size
= field
->size
;
1440 if (field
->flags
& VMS_VBUFFER
) {
1441 size
= *(int32_t *)(opaque
+field
->size_offset
);
1442 if (field
->flags
& VMS_MULTIPLY
) {
1443 size
*= field
->size
;
1446 if (field
->flags
& VMS_ARRAY
) {
1447 n_elems
= field
->num
;
1448 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1449 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1450 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1451 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1452 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1453 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1454 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1455 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1457 if (field
->flags
& VMS_POINTER
) {
1458 base_addr
= *(void **)base_addr
+ field
->start
;
1460 for (i
= 0; i
< n_elems
; i
++) {
1461 void *addr
= base_addr
+ size
* i
;
1463 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1464 addr
= *(void **)addr
;
1466 if (field
->flags
& VMS_STRUCT
) {
1467 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1469 ret
= field
->info
->get(f
, addr
, size
);
1479 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1483 if (vmsd
->post_load
) {
1484 return vmsd
->post_load(opaque
, version_id
);
1489 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1492 VMStateField
*field
= vmsd
->fields
;
1494 if (vmsd
->pre_save
) {
1495 vmsd
->pre_save(opaque
);
1497 while(field
->name
) {
1498 if (!field
->field_exists
||
1499 field
->field_exists(opaque
, vmsd
->version_id
)) {
1500 void *base_addr
= opaque
+ field
->offset
;
1502 int size
= field
->size
;
1504 if (field
->flags
& VMS_VBUFFER
) {
1505 size
= *(int32_t *)(opaque
+field
->size_offset
);
1506 if (field
->flags
& VMS_MULTIPLY
) {
1507 size
*= field
->size
;
1510 if (field
->flags
& VMS_ARRAY
) {
1511 n_elems
= field
->num
;
1512 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1513 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1514 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1515 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1516 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1517 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1518 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1519 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1521 if (field
->flags
& VMS_POINTER
) {
1522 base_addr
= *(void **)base_addr
+ field
->start
;
1524 for (i
= 0; i
< n_elems
; i
++) {
1525 void *addr
= base_addr
+ size
* i
;
1527 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1528 addr
= *(void **)addr
;
1530 if (field
->flags
& VMS_STRUCT
) {
1531 vmstate_save_state(f
, field
->vmsd
, addr
);
1533 field
->info
->put(f
, addr
, size
);
1539 vmstate_subsection_save(f
, vmsd
, opaque
);
1542 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1544 if (!se
->vmsd
) { /* Old style */
1545 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1547 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1550 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1552 if (!se
->vmsd
) { /* Old style */
1553 se
->ops
->save_state(f
, se
->opaque
);
1556 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1559 #define QEMU_VM_FILE_MAGIC 0x5145564d
1560 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1561 #define QEMU_VM_FILE_VERSION 0x00000003
1563 #define QEMU_VM_EOF 0x00
1564 #define QEMU_VM_SECTION_START 0x01
1565 #define QEMU_VM_SECTION_PART 0x02
1566 #define QEMU_VM_SECTION_END 0x03
1567 #define QEMU_VM_SECTION_FULL 0x04
1568 #define QEMU_VM_SUBSECTION 0x05
1570 bool qemu_savevm_state_blocked(Error
**errp
)
1574 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1575 if (se
->no_migrate
) {
1576 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1583 int qemu_savevm_state_begin(QEMUFile
*f
,
1584 const MigrationParams
*params
)
1589 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1590 if (!se
->ops
|| !se
->ops
->set_params
) {
1593 se
->ops
->set_params(params
, se
->opaque
);
1596 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1597 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1599 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1602 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1605 if (se
->ops
&& se
->ops
->is_active
) {
1606 if (!se
->ops
->is_active(se
->opaque
)) {
1611 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1612 qemu_put_be32(f
, se
->section_id
);
1615 len
= strlen(se
->idstr
);
1616 qemu_put_byte(f
, len
);
1617 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1619 qemu_put_be32(f
, se
->instance_id
);
1620 qemu_put_be32(f
, se
->version_id
);
1622 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1627 ret
= qemu_file_get_error(f
);
1632 * this function has three return values:
1633 * negative: there was one error, and we have -errno.
1634 * 0 : We haven't finished, caller have to go again
1635 * 1 : We have finished, we can go to complete phase
1637 int qemu_savevm_state_iterate(QEMUFile
*f
)
1642 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1643 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1646 if (se
->ops
&& se
->ops
->is_active
) {
1647 if (!se
->ops
->is_active(se
->opaque
)) {
1651 if (qemu_file_rate_limit(f
)) {
1654 trace_savevm_section_start();
1656 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1657 qemu_put_be32(f
, se
->section_id
);
1659 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1660 trace_savevm_section_end(se
->section_id
);
1663 /* Do not proceed to the next vmstate before this one reported
1664 completion of the current stage. This serializes the migration
1665 and reduces the probability that a faster changing state is
1666 synchronized over and over again. */
1673 ret
= qemu_file_get_error(f
);
1677 int qemu_savevm_state_complete(QEMUFile
*f
)
1682 cpu_synchronize_all_states();
1684 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1685 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1688 if (se
->ops
&& se
->ops
->is_active
) {
1689 if (!se
->ops
->is_active(se
->opaque
)) {
1693 trace_savevm_section_start();
1695 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1696 qemu_put_be32(f
, se
->section_id
);
1698 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1699 trace_savevm_section_end(se
->section_id
);
1705 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1708 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1711 trace_savevm_section_start();
1713 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1714 qemu_put_be32(f
, se
->section_id
);
1717 len
= strlen(se
->idstr
);
1718 qemu_put_byte(f
, len
);
1719 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1721 qemu_put_be32(f
, se
->instance_id
);
1722 qemu_put_be32(f
, se
->version_id
);
1724 vmstate_save(f
, se
);
1725 trace_savevm_section_end(se
->section_id
);
1728 qemu_put_byte(f
, QEMU_VM_EOF
);
1730 return qemu_file_get_error(f
);
1733 uint64_t qemu_savevm_state_pending(QEMUFile
*f
, uint64_t max_size
)
1738 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1739 if (!se
->ops
|| !se
->ops
->save_live_pending
) {
1742 if (se
->ops
&& se
->ops
->is_active
) {
1743 if (!se
->ops
->is_active(se
->opaque
)) {
1747 ret
+= se
->ops
->save_live_pending(f
, se
->opaque
, max_size
);
1752 void qemu_savevm_state_cancel(void)
1756 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1757 if (se
->ops
&& se
->ops
->cancel
) {
1758 se
->ops
->cancel(se
->opaque
);
1763 static int qemu_savevm_state(QEMUFile
*f
)
1766 MigrationParams params
= {
1771 if (qemu_savevm_state_blocked(NULL
)) {
1775 ret
= qemu_savevm_state_begin(f
, ¶ms
);
1780 ret
= qemu_savevm_state_iterate(f
);
1785 ret
= qemu_savevm_state_complete(f
);
1789 ret
= qemu_file_get_error(f
);
1792 qemu_savevm_state_cancel();
1798 static int qemu_save_device_state(QEMUFile
*f
)
1802 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1803 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1805 cpu_synchronize_all_states();
1807 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1813 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1818 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1819 qemu_put_be32(f
, se
->section_id
);
1822 len
= strlen(se
->idstr
);
1823 qemu_put_byte(f
, len
);
1824 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1826 qemu_put_be32(f
, se
->instance_id
);
1827 qemu_put_be32(f
, se
->version_id
);
1829 vmstate_save(f
, se
);
1832 qemu_put_byte(f
, QEMU_VM_EOF
);
1834 return qemu_file_get_error(f
);
1837 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1841 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1842 if (!strcmp(se
->idstr
, idstr
) &&
1843 (instance_id
== se
->instance_id
||
1844 instance_id
== se
->alias_id
))
1846 /* Migrating from an older version? */
1847 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1848 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1849 (instance_id
== se
->compat
->instance_id
||
1850 instance_id
== se
->alias_id
))
1857 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1859 while(sub
&& sub
->needed
) {
1860 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1868 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1871 while (qemu_peek_byte(f
, 0) == QEMU_VM_SUBSECTION
) {
1874 uint8_t version_id
, len
, size
;
1875 const VMStateDescription
*sub_vmsd
;
1877 len
= qemu_peek_byte(f
, 1);
1878 if (len
< strlen(vmsd
->name
) + 1) {
1879 /* subsection name has be be "section_name/a" */
1882 size
= qemu_peek_buffer(f
, (uint8_t *)idstr
, len
, 2);
1888 if (strncmp(vmsd
->name
, idstr
, strlen(vmsd
->name
)) != 0) {
1889 /* it don't have a valid subsection name */
1892 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1893 if (sub_vmsd
== NULL
) {
1896 qemu_file_skip(f
, 1); /* subsection */
1897 qemu_file_skip(f
, 1); /* len */
1898 qemu_file_skip(f
, len
); /* idstr */
1899 version_id
= qemu_get_be32(f
);
1901 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1909 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1912 const VMStateSubsection
*sub
= vmsd
->subsections
;
1914 while (sub
&& sub
->needed
) {
1915 if (sub
->needed(opaque
)) {
1916 const VMStateDescription
*vmsd
= sub
->vmsd
;
1919 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1920 len
= strlen(vmsd
->name
);
1921 qemu_put_byte(f
, len
);
1922 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1923 qemu_put_be32(f
, vmsd
->version_id
);
1924 vmstate_save_state(f
, vmsd
, opaque
);
1930 typedef struct LoadStateEntry
{
1931 QLIST_ENTRY(LoadStateEntry
) entry
;
1937 int qemu_loadvm_state(QEMUFile
*f
)
1939 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1940 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1941 LoadStateEntry
*le
, *new_le
;
1942 uint8_t section_type
;
1946 if (qemu_savevm_state_blocked(NULL
)) {
1950 v
= qemu_get_be32(f
);
1951 if (v
!= QEMU_VM_FILE_MAGIC
)
1954 v
= qemu_get_be32(f
);
1955 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1956 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1959 if (v
!= QEMU_VM_FILE_VERSION
)
1962 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1963 uint32_t instance_id
, version_id
, section_id
;
1968 switch (section_type
) {
1969 case QEMU_VM_SECTION_START
:
1970 case QEMU_VM_SECTION_FULL
:
1971 /* Read section start */
1972 section_id
= qemu_get_be32(f
);
1973 len
= qemu_get_byte(f
);
1974 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1976 instance_id
= qemu_get_be32(f
);
1977 version_id
= qemu_get_be32(f
);
1979 /* Find savevm section */
1980 se
= find_se(idstr
, instance_id
);
1982 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1987 /* Validate version */
1988 if (version_id
> se
->version_id
) {
1989 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1990 version_id
, idstr
, se
->version_id
);
1996 le
= g_malloc0(sizeof(*le
));
1999 le
->section_id
= section_id
;
2000 le
->version_id
= version_id
;
2001 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
2003 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2005 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
2006 instance_id
, idstr
);
2010 case QEMU_VM_SECTION_PART
:
2011 case QEMU_VM_SECTION_END
:
2012 section_id
= qemu_get_be32(f
);
2014 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
2015 if (le
->section_id
== section_id
) {
2020 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
2025 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2027 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
2033 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
2039 cpu_synchronize_all_post_init();
2044 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
2045 QLIST_REMOVE(le
, entry
);
2050 ret
= qemu_file_get_error(f
);
2056 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
2059 QEMUSnapshotInfo
*sn_tab
, *sn
;
2063 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2066 for(i
= 0; i
< nb_sns
; i
++) {
2068 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
2079 * Deletes snapshots of a given name in all opened images.
2081 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
2083 BlockDriverState
*bs
;
2084 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
2088 while ((bs
= bdrv_next(bs
))) {
2089 if (bdrv_can_snapshot(bs
) &&
2090 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
2092 ret
= bdrv_snapshot_delete(bs
, name
);
2095 "Error while deleting snapshot on '%s'\n",
2096 bdrv_get_device_name(bs
));
2105 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
2107 BlockDriverState
*bs
, *bs1
;
2108 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
2111 int saved_vm_running
;
2112 uint64_t vm_state_size
;
2115 const char *name
= qdict_get_try_str(qdict
, "name");
2117 /* Verify if there is a device that doesn't support snapshots and is writable */
2119 while ((bs
= bdrv_next(bs
))) {
2121 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2125 if (!bdrv_can_snapshot(bs
)) {
2126 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2127 bdrv_get_device_name(bs
));
2132 bs
= bdrv_snapshots();
2134 monitor_printf(mon
, "No block device can accept snapshots\n");
2138 saved_vm_running
= runstate_is_running();
2139 vm_stop(RUN_STATE_SAVE_VM
);
2141 memset(sn
, 0, sizeof(*sn
));
2143 /* fill auxiliary fields */
2144 qemu_gettimeofday(&tv
);
2145 sn
->date_sec
= tv
.tv_sec
;
2146 sn
->date_nsec
= tv
.tv_usec
* 1000;
2147 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2150 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2152 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2153 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2155 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2158 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2159 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2160 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2163 /* Delete old snapshots of the same name */
2164 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2168 /* save the VM state */
2169 f
= qemu_fopen_bdrv(bs
, 1);
2171 monitor_printf(mon
, "Could not open VM state file\n");
2174 ret
= qemu_savevm_state(f
);
2175 vm_state_size
= qemu_ftell(f
);
2178 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2182 /* create the snapshots */
2185 while ((bs1
= bdrv_next(bs1
))) {
2186 if (bdrv_can_snapshot(bs1
)) {
2187 /* Write VM state size only to the image that contains the state */
2188 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2189 ret
= bdrv_snapshot_create(bs1
, sn
);
2191 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2192 bdrv_get_device_name(bs1
));
2198 if (saved_vm_running
)
2202 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2205 int saved_vm_running
;
2208 saved_vm_running
= runstate_is_running();
2209 vm_stop(RUN_STATE_SAVE_VM
);
2211 f
= qemu_fopen(filename
, "wb");
2213 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2216 ret
= qemu_save_device_state(f
);
2219 error_set(errp
, QERR_IO_ERROR
);
2223 if (saved_vm_running
)
2227 int load_vmstate(const char *name
)
2229 BlockDriverState
*bs
, *bs_vm_state
;
2230 QEMUSnapshotInfo sn
;
2234 bs_vm_state
= bdrv_snapshots();
2236 error_report("No block device supports snapshots");
2240 /* Don't even try to load empty VM states */
2241 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2244 } else if (sn
.vm_state_size
== 0) {
2245 error_report("This is a disk-only snapshot. Revert to it offline "
2250 /* Verify if there is any device that doesn't support snapshots and is
2251 writable and check if the requested snapshot is available too. */
2253 while ((bs
= bdrv_next(bs
))) {
2255 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2259 if (!bdrv_can_snapshot(bs
)) {
2260 error_report("Device '%s' is writable but does not support snapshots.",
2261 bdrv_get_device_name(bs
));
2265 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2267 error_report("Device '%s' does not have the requested snapshot '%s'",
2268 bdrv_get_device_name(bs
), name
);
2273 /* Flush all IO requests so they don't interfere with the new state. */
2277 while ((bs
= bdrv_next(bs
))) {
2278 if (bdrv_can_snapshot(bs
)) {
2279 ret
= bdrv_snapshot_goto(bs
, name
);
2281 error_report("Error %d while activating snapshot '%s' on '%s'",
2282 ret
, name
, bdrv_get_device_name(bs
));
2288 /* restore the VM state */
2289 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2291 error_report("Could not open VM state file");
2295 qemu_system_reset(VMRESET_SILENT
);
2296 ret
= qemu_loadvm_state(f
);
2300 error_report("Error %d while loading VM state", ret
);
2307 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2309 BlockDriverState
*bs
, *bs1
;
2311 const char *name
= qdict_get_str(qdict
, "name");
2313 bs
= bdrv_snapshots();
2315 monitor_printf(mon
, "No block device supports snapshots\n");
2320 while ((bs1
= bdrv_next(bs1
))) {
2321 if (bdrv_can_snapshot(bs1
)) {
2322 ret
= bdrv_snapshot_delete(bs1
, name
);
2324 if (ret
== -ENOTSUP
)
2326 "Snapshots not supported on device '%s'\n",
2327 bdrv_get_device_name(bs1
));
2329 monitor_printf(mon
, "Error %d while deleting snapshot on "
2330 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2336 void do_info_snapshots(Monitor
*mon
, const QDict
*qdict
)
2338 BlockDriverState
*bs
, *bs1
;
2339 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2340 int nb_sns
, i
, ret
, available
;
2342 int *available_snapshots
;
2345 bs
= bdrv_snapshots();
2347 monitor_printf(mon
, "No available block device supports snapshots\n");
2351 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2353 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2358 monitor_printf(mon
, "There is no snapshot available.\n");
2362 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2364 for (i
= 0; i
< nb_sns
; i
++) {
2369 while ((bs1
= bdrv_next(bs1
))) {
2370 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2371 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2380 available_snapshots
[total
] = i
;
2386 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2387 for (i
= 0; i
< total
; i
++) {
2388 sn
= &sn_tab
[available_snapshots
[i
]];
2389 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2392 monitor_printf(mon
, "There is no suitable snapshot available\n");
2396 g_free(available_snapshots
);
2400 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2402 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2403 memory_region_name(mr
), dev
);
2406 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2408 /* Nothing do to while the implementation is in RAMBlock */
2411 void vmstate_register_ram_global(MemoryRegion
*mr
)
2413 vmstate_register_ram(mr
, NULL
);