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
;
260 if (s
->file
->ops
->put_buffer
) {
261 int fd
= fileno(s
->stdio_file
);
264 ret
= fstat(fd
, &st
);
265 if (ret
== 0 && S_ISREG(st
.st_mode
)) {
267 * If the file handle is a regular file make sure the
268 * data is flushed to disk before signaling success.
277 if (fclose(s
->stdio_file
) == EOF
) {
284 static const QEMUFileOps stdio_pipe_read_ops
= {
285 .get_fd
= stdio_get_fd
,
286 .get_buffer
= stdio_get_buffer
,
287 .close
= stdio_pclose
290 static const QEMUFileOps stdio_pipe_write_ops
= {
291 .get_fd
= stdio_get_fd
,
292 .put_buffer
= stdio_put_buffer
,
293 .close
= stdio_pclose
296 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
301 stdio_file
= popen(command
, mode
);
302 if (stdio_file
== NULL
) {
306 if (mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
307 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
311 s
= g_malloc0(sizeof(QEMUFileStdio
));
313 s
->stdio_file
= stdio_file
;
316 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_read_ops
);
318 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_write_ops
);
323 static const QEMUFileOps stdio_file_read_ops
= {
324 .get_fd
= stdio_get_fd
,
325 .get_buffer
= stdio_get_buffer
,
326 .close
= stdio_fclose
329 static const QEMUFileOps stdio_file_write_ops
= {
330 .get_fd
= stdio_get_fd
,
331 .put_buffer
= stdio_put_buffer
,
332 .close
= stdio_fclose
335 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
340 (mode
[0] != 'r' && mode
[0] != 'w') ||
341 mode
[1] != 'b' || mode
[2] != 0) {
342 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
346 s
= g_malloc0(sizeof(QEMUFileStdio
));
347 s
->stdio_file
= fdopen(fd
, mode
);
352 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
354 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
363 static const QEMUFileOps socket_read_ops
= {
364 .get_fd
= socket_get_fd
,
365 .get_buffer
= socket_get_buffer
,
366 .close
= socket_close
369 QEMUFile
*qemu_fopen_socket(int fd
)
371 QEMUFileSocket
*s
= g_malloc0(sizeof(QEMUFileSocket
));
374 s
->file
= qemu_fopen_ops(s
, &socket_read_ops
);
378 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
383 (mode
[0] != 'r' && mode
[0] != 'w') ||
384 mode
[1] != 'b' || mode
[2] != 0) {
385 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
389 s
= g_malloc0(sizeof(QEMUFileStdio
));
391 s
->stdio_file
= fopen(filename
, mode
);
396 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
398 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
406 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
407 int64_t pos
, int size
)
409 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
413 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
415 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
418 static int bdrv_fclose(void *opaque
)
420 return bdrv_flush(opaque
);
423 static const QEMUFileOps bdrv_read_ops
= {
424 .get_buffer
= block_get_buffer
,
428 static const QEMUFileOps bdrv_write_ops
= {
429 .put_buffer
= block_put_buffer
,
433 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
436 return qemu_fopen_ops(bs
, &bdrv_write_ops
);
437 return qemu_fopen_ops(bs
, &bdrv_read_ops
);
440 QEMUFile
*qemu_fopen_ops(void *opaque
, const QEMUFileOps
*ops
)
444 f
= g_malloc0(sizeof(QEMUFile
));
453 int qemu_file_get_error(QEMUFile
*f
)
455 return f
->last_error
;
458 static void qemu_file_set_error(QEMUFile
*f
, int ret
)
460 if (f
->last_error
== 0) {
465 /** Flushes QEMUFile buffer
468 static void qemu_fflush(QEMUFile
*f
)
472 if (!f
->ops
->put_buffer
) {
475 if (f
->is_write
&& f
->buf_index
> 0) {
476 ret
= f
->ops
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
478 f
->buf_offset
+= f
->buf_index
;
483 qemu_file_set_error(f
, ret
);
487 static void qemu_fill_buffer(QEMUFile
*f
)
492 if (!f
->ops
->get_buffer
)
498 pending
= f
->buf_size
- f
->buf_index
;
500 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
503 f
->buf_size
= pending
;
505 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
506 IO_BUF_SIZE
- pending
);
509 f
->buf_offset
+= len
;
510 } else if (len
== 0) {
511 qemu_file_set_error(f
, -EIO
);
512 } else if (len
!= -EAGAIN
)
513 qemu_file_set_error(f
, len
);
516 int qemu_get_fd(QEMUFile
*f
)
518 if (f
->ops
->get_fd
) {
519 return f
->ops
->get_fd(f
->opaque
);
526 * Returns negative error value if any error happened on previous operations or
527 * while closing the file. Returns 0 or positive number on success.
529 * The meaning of return value on success depends on the specific backend
532 int qemu_fclose(QEMUFile
*f
)
536 ret
= qemu_file_get_error(f
);
539 int ret2
= f
->ops
->close(f
->opaque
);
544 /* If any error was spotted before closing, we should report it
545 * instead of the close() return value.
554 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
562 if (f
->is_write
== 0 && f
->buf_index
> 0) {
564 "Attempted to write to buffer while read buffer is not empty\n");
569 l
= IO_BUF_SIZE
- f
->buf_index
;
572 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
577 if (f
->buf_index
>= IO_BUF_SIZE
) {
579 if (qemu_file_get_error(f
)) {
586 void qemu_put_byte(QEMUFile
*f
, int v
)
592 if (f
->is_write
== 0 && f
->buf_index
> 0) {
594 "Attempted to write to buffer while read buffer is not empty\n");
598 f
->buf
[f
->buf_index
++] = v
;
600 if (f
->buf_index
>= IO_BUF_SIZE
) {
605 static void qemu_file_skip(QEMUFile
*f
, int size
)
607 if (f
->buf_index
+ size
<= f
->buf_size
) {
608 f
->buf_index
+= size
;
612 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
621 index
= f
->buf_index
+ offset
;
622 pending
= f
->buf_size
- index
;
623 if (pending
< size
) {
625 index
= f
->buf_index
+ offset
;
626 pending
= f
->buf_size
- index
;
632 if (size
> pending
) {
636 memcpy(buf
, f
->buf
+ index
, size
);
640 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
645 while (pending
> 0) {
648 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
652 qemu_file_skip(f
, res
);
660 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
662 int index
= f
->buf_index
+ offset
;
668 if (index
>= f
->buf_size
) {
670 index
= f
->buf_index
+ offset
;
671 if (index
>= f
->buf_size
) {
675 return f
->buf
[index
];
678 int qemu_get_byte(QEMUFile
*f
)
682 result
= qemu_peek_byte(f
, 0);
683 qemu_file_skip(f
, 1);
687 int64_t qemu_ftell(QEMUFile
*f
)
689 /* buf_offset excludes buffer for writing but includes it for reading */
691 return f
->buf_offset
+ f
->buf_index
;
693 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
697 int qemu_file_rate_limit(QEMUFile
*f
)
699 if (f
->ops
->rate_limit
)
700 return f
->ops
->rate_limit(f
->opaque
);
705 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
707 if (f
->ops
->get_rate_limit
)
708 return f
->ops
->get_rate_limit(f
->opaque
);
713 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
715 /* any failed or completed migration keeps its state to allow probing of
716 * migration data, but has no associated file anymore */
717 if (f
&& f
->ops
->set_rate_limit
)
718 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
723 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
725 qemu_put_byte(f
, v
>> 8);
729 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
731 qemu_put_byte(f
, v
>> 24);
732 qemu_put_byte(f
, v
>> 16);
733 qemu_put_byte(f
, v
>> 8);
737 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
739 qemu_put_be32(f
, v
>> 32);
743 unsigned int qemu_get_be16(QEMUFile
*f
)
746 v
= qemu_get_byte(f
) << 8;
747 v
|= qemu_get_byte(f
);
751 unsigned int qemu_get_be32(QEMUFile
*f
)
754 v
= qemu_get_byte(f
) << 24;
755 v
|= qemu_get_byte(f
) << 16;
756 v
|= qemu_get_byte(f
) << 8;
757 v
|= qemu_get_byte(f
);
761 uint64_t qemu_get_be64(QEMUFile
*f
)
764 v
= (uint64_t)qemu_get_be32(f
) << 32;
765 v
|= qemu_get_be32(f
);
772 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
774 uint64_t expire_time
;
776 expire_time
= qemu_timer_expire_time_ns(ts
);
777 qemu_put_be64(f
, expire_time
);
780 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
782 uint64_t expire_time
;
784 expire_time
= qemu_get_be64(f
);
785 if (expire_time
!= -1) {
786 qemu_mod_timer_ns(ts
, expire_time
);
795 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
798 *v
= qemu_get_byte(f
);
802 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
805 qemu_put_byte(f
, *v
);
808 const VMStateInfo vmstate_info_bool
= {
816 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
823 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
829 const VMStateInfo vmstate_info_int8
= {
837 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
840 qemu_get_sbe16s(f
, v
);
844 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
847 qemu_put_sbe16s(f
, v
);
850 const VMStateInfo vmstate_info_int16
= {
858 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
861 qemu_get_sbe32s(f
, v
);
865 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
868 qemu_put_sbe32s(f
, v
);
871 const VMStateInfo vmstate_info_int32
= {
877 /* 32 bit int. See that the received value is the same than the one
880 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
884 qemu_get_sbe32s(f
, &v2
);
891 const VMStateInfo vmstate_info_int32_equal
= {
892 .name
= "int32 equal",
893 .get
= get_int32_equal
,
897 /* 32 bit int. See that the received value is the less or the same
898 than the one in the field */
900 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
904 qemu_get_sbe32s(f
, &new);
911 const VMStateInfo vmstate_info_int32_le
= {
912 .name
= "int32 equal",
919 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
922 qemu_get_sbe64s(f
, v
);
926 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
929 qemu_put_sbe64s(f
, v
);
932 const VMStateInfo vmstate_info_int64
= {
938 /* 8 bit unsigned int */
940 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
947 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
953 const VMStateInfo vmstate_info_uint8
= {
959 /* 16 bit unsigned int */
961 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
964 qemu_get_be16s(f
, v
);
968 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
971 qemu_put_be16s(f
, v
);
974 const VMStateInfo vmstate_info_uint16
= {
980 /* 32 bit unsigned int */
982 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
985 qemu_get_be32s(f
, v
);
989 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
992 qemu_put_be32s(f
, v
);
995 const VMStateInfo vmstate_info_uint32
= {
1001 /* 32 bit uint. See that the received value is the same than the one
1004 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
1008 qemu_get_be32s(f
, &v2
);
1016 const VMStateInfo vmstate_info_uint32_equal
= {
1017 .name
= "uint32 equal",
1018 .get
= get_uint32_equal
,
1022 /* 64 bit unsigned int */
1024 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1027 qemu_get_be64s(f
, v
);
1031 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1034 qemu_put_be64s(f
, v
);
1037 const VMStateInfo vmstate_info_uint64
= {
1043 /* 8 bit int. See that the received value is the same than the one
1046 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1050 qemu_get_8s(f
, &v2
);
1057 const VMStateInfo vmstate_info_uint8_equal
= {
1058 .name
= "uint8 equal",
1059 .get
= get_uint8_equal
,
1063 /* 16 bit unsigned int int. See that the received value is the same than the one
1066 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1070 qemu_get_be16s(f
, &v2
);
1077 const VMStateInfo vmstate_info_uint16_equal
= {
1078 .name
= "uint16 equal",
1079 .get
= get_uint16_equal
,
1085 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1088 qemu_get_timer(f
, v
);
1092 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1095 qemu_put_timer(f
, v
);
1098 const VMStateInfo vmstate_info_timer
= {
1104 /* uint8_t buffers */
1106 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1109 qemu_get_buffer(f
, v
, size
);
1113 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1116 qemu_put_buffer(f
, v
, size
);
1119 const VMStateInfo vmstate_info_buffer
= {
1125 /* unused buffers: space that was used for some fields that are
1126 not useful anymore */
1128 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1134 block_len
= MIN(sizeof(buf
), size
);
1136 qemu_get_buffer(f
, buf
, block_len
);
1141 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1143 static const uint8_t buf
[1024];
1147 block_len
= MIN(sizeof(buf
), size
);
1149 qemu_put_buffer(f
, buf
, block_len
);
1153 const VMStateInfo vmstate_info_unused_buffer
= {
1154 .name
= "unused_buffer",
1155 .get
= get_unused_buffer
,
1156 .put
= put_unused_buffer
,
1159 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1160 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1161 * bit words with the bits in big endian order. The in-memory format
1162 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1164 /* This is the number of 64 bit words sent over the wire */
1165 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1166 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1168 unsigned long *bmp
= pv
;
1170 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1171 uint64_t w
= qemu_get_be64(f
);
1173 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1174 bmp
[idx
++] = w
>> 32;
1180 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1182 unsigned long *bmp
= pv
;
1184 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1185 uint64_t w
= bmp
[idx
++];
1186 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1187 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1189 qemu_put_be64(f
, w
);
1193 const VMStateInfo vmstate_info_bitmap
= {
1199 typedef struct CompatEntry
{
1204 typedef struct SaveStateEntry
{
1205 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1211 SaveVMHandlers
*ops
;
1212 const VMStateDescription
*vmsd
;
1214 CompatEntry
*compat
;
1220 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1221 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1222 static int global_section_id
;
1224 static int calculate_new_instance_id(const char *idstr
)
1227 int instance_id
= 0;
1229 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1230 if (strcmp(idstr
, se
->idstr
) == 0
1231 && instance_id
<= se
->instance_id
) {
1232 instance_id
= se
->instance_id
+ 1;
1238 static int calculate_compat_instance_id(const char *idstr
)
1241 int instance_id
= 0;
1243 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1247 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1248 && instance_id
<= se
->compat
->instance_id
) {
1249 instance_id
= se
->compat
->instance_id
+ 1;
1255 /* TODO: Individual devices generally have very little idea about the rest
1256 of the system, so instance_id should be removed/replaced.
1257 Meanwhile pass -1 as instance_id if you do not already have a clearly
1258 distinguishing id for all instances of your device class. */
1259 int register_savevm_live(DeviceState
*dev
,
1263 SaveVMHandlers
*ops
,
1268 se
= g_malloc0(sizeof(SaveStateEntry
));
1269 se
->version_id
= version_id
;
1270 se
->section_id
= global_section_id
++;
1272 se
->opaque
= opaque
;
1275 /* if this is a live_savem then set is_ram */
1276 if (ops
->save_live_setup
!= NULL
) {
1281 char *id
= qdev_get_dev_path(dev
);
1283 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1284 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1287 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1288 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1289 se
->compat
->instance_id
= instance_id
== -1 ?
1290 calculate_compat_instance_id(idstr
) : instance_id
;
1294 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1296 if (instance_id
== -1) {
1297 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1299 se
->instance_id
= instance_id
;
1301 assert(!se
->compat
|| se
->instance_id
== 0);
1302 /* add at the end of list */
1303 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1307 int register_savevm(DeviceState
*dev
,
1311 SaveStateHandler
*save_state
,
1312 LoadStateHandler
*load_state
,
1315 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1316 ops
->save_state
= save_state
;
1317 ops
->load_state
= load_state
;
1318 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1322 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1324 SaveStateEntry
*se
, *new_se
;
1328 char *path
= qdev_get_dev_path(dev
);
1330 pstrcpy(id
, sizeof(id
), path
);
1331 pstrcat(id
, sizeof(id
), "/");
1335 pstrcat(id
, sizeof(id
), idstr
);
1337 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1338 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1339 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1349 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1350 const VMStateDescription
*vmsd
,
1351 void *opaque
, int alias_id
,
1352 int required_for_version
)
1356 /* If this triggers, alias support can be dropped for the vmsd. */
1357 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1359 se
= g_malloc0(sizeof(SaveStateEntry
));
1360 se
->version_id
= vmsd
->version_id
;
1361 se
->section_id
= global_section_id
++;
1362 se
->opaque
= opaque
;
1364 se
->alias_id
= alias_id
;
1365 se
->no_migrate
= vmsd
->unmigratable
;
1368 char *id
= qdev_get_dev_path(dev
);
1370 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1371 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1374 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1375 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1376 se
->compat
->instance_id
= instance_id
== -1 ?
1377 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1381 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1383 if (instance_id
== -1) {
1384 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1386 se
->instance_id
= instance_id
;
1388 assert(!se
->compat
|| se
->instance_id
== 0);
1389 /* add at the end of list */
1390 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1394 int vmstate_register(DeviceState
*dev
, int instance_id
,
1395 const VMStateDescription
*vmsd
, void *opaque
)
1397 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1401 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1404 SaveStateEntry
*se
, *new_se
;
1406 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1407 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1408 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1417 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1419 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1422 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1423 void *opaque
, int version_id
)
1425 VMStateField
*field
= vmsd
->fields
;
1428 if (version_id
> vmsd
->version_id
) {
1431 if (version_id
< vmsd
->minimum_version_id_old
) {
1434 if (version_id
< vmsd
->minimum_version_id
) {
1435 return vmsd
->load_state_old(f
, opaque
, version_id
);
1437 if (vmsd
->pre_load
) {
1438 int ret
= vmsd
->pre_load(opaque
);
1442 while(field
->name
) {
1443 if ((field
->field_exists
&&
1444 field
->field_exists(opaque
, version_id
)) ||
1445 (!field
->field_exists
&&
1446 field
->version_id
<= version_id
)) {
1447 void *base_addr
= opaque
+ field
->offset
;
1449 int size
= field
->size
;
1451 if (field
->flags
& VMS_VBUFFER
) {
1452 size
= *(int32_t *)(opaque
+field
->size_offset
);
1453 if (field
->flags
& VMS_MULTIPLY
) {
1454 size
*= field
->size
;
1457 if (field
->flags
& VMS_ARRAY
) {
1458 n_elems
= field
->num
;
1459 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1460 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1461 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1462 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1463 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1464 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1465 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1466 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1468 if (field
->flags
& VMS_POINTER
) {
1469 base_addr
= *(void **)base_addr
+ field
->start
;
1471 for (i
= 0; i
< n_elems
; i
++) {
1472 void *addr
= base_addr
+ size
* i
;
1474 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1475 addr
= *(void **)addr
;
1477 if (field
->flags
& VMS_STRUCT
) {
1478 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1480 ret
= field
->info
->get(f
, addr
, size
);
1490 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1494 if (vmsd
->post_load
) {
1495 return vmsd
->post_load(opaque
, version_id
);
1500 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1503 VMStateField
*field
= vmsd
->fields
;
1505 if (vmsd
->pre_save
) {
1506 vmsd
->pre_save(opaque
);
1508 while(field
->name
) {
1509 if (!field
->field_exists
||
1510 field
->field_exists(opaque
, vmsd
->version_id
)) {
1511 void *base_addr
= opaque
+ field
->offset
;
1513 int size
= field
->size
;
1515 if (field
->flags
& VMS_VBUFFER
) {
1516 size
= *(int32_t *)(opaque
+field
->size_offset
);
1517 if (field
->flags
& VMS_MULTIPLY
) {
1518 size
*= field
->size
;
1521 if (field
->flags
& VMS_ARRAY
) {
1522 n_elems
= field
->num
;
1523 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1524 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1525 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1526 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1527 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1528 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1529 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1530 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1532 if (field
->flags
& VMS_POINTER
) {
1533 base_addr
= *(void **)base_addr
+ field
->start
;
1535 for (i
= 0; i
< n_elems
; i
++) {
1536 void *addr
= base_addr
+ size
* i
;
1538 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1539 addr
= *(void **)addr
;
1541 if (field
->flags
& VMS_STRUCT
) {
1542 vmstate_save_state(f
, field
->vmsd
, addr
);
1544 field
->info
->put(f
, addr
, size
);
1550 vmstate_subsection_save(f
, vmsd
, opaque
);
1553 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1555 if (!se
->vmsd
) { /* Old style */
1556 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1558 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1561 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1563 if (!se
->vmsd
) { /* Old style */
1564 se
->ops
->save_state(f
, se
->opaque
);
1567 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1570 #define QEMU_VM_FILE_MAGIC 0x5145564d
1571 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1572 #define QEMU_VM_FILE_VERSION 0x00000003
1574 #define QEMU_VM_EOF 0x00
1575 #define QEMU_VM_SECTION_START 0x01
1576 #define QEMU_VM_SECTION_PART 0x02
1577 #define QEMU_VM_SECTION_END 0x03
1578 #define QEMU_VM_SECTION_FULL 0x04
1579 #define QEMU_VM_SUBSECTION 0x05
1581 bool qemu_savevm_state_blocked(Error
**errp
)
1585 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1586 if (se
->no_migrate
) {
1587 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1594 void qemu_savevm_state_begin(QEMUFile
*f
,
1595 const MigrationParams
*params
)
1600 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1601 if (!se
->ops
|| !se
->ops
->set_params
) {
1604 se
->ops
->set_params(params
, se
->opaque
);
1607 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1608 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1610 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1613 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1616 if (se
->ops
&& se
->ops
->is_active
) {
1617 if (!se
->ops
->is_active(se
->opaque
)) {
1622 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1623 qemu_put_be32(f
, se
->section_id
);
1626 len
= strlen(se
->idstr
);
1627 qemu_put_byte(f
, len
);
1628 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1630 qemu_put_be32(f
, se
->instance_id
);
1631 qemu_put_be32(f
, se
->version_id
);
1633 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1635 qemu_file_set_error(f
, ret
);
1642 * this function has three return values:
1643 * negative: there was one error, and we have -errno.
1644 * 0 : We haven't finished, caller have to go again
1645 * 1 : We have finished, we can go to complete phase
1647 int qemu_savevm_state_iterate(QEMUFile
*f
)
1652 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1653 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1656 if (se
->ops
&& se
->ops
->is_active
) {
1657 if (!se
->ops
->is_active(se
->opaque
)) {
1661 if (qemu_file_rate_limit(f
)) {
1664 trace_savevm_section_start();
1666 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1667 qemu_put_be32(f
, se
->section_id
);
1669 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1670 trace_savevm_section_end(se
->section_id
);
1673 qemu_file_set_error(f
, ret
);
1676 /* Do not proceed to the next vmstate before this one reported
1677 completion of the current stage. This serializes the migration
1678 and reduces the probability that a faster changing state is
1679 synchronized over and over again. */
1686 void qemu_savevm_state_complete(QEMUFile
*f
)
1691 cpu_synchronize_all_states();
1693 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1694 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1697 if (se
->ops
&& se
->ops
->is_active
) {
1698 if (!se
->ops
->is_active(se
->opaque
)) {
1702 trace_savevm_section_start();
1704 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1705 qemu_put_be32(f
, se
->section_id
);
1707 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1708 trace_savevm_section_end(se
->section_id
);
1710 qemu_file_set_error(f
, ret
);
1715 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1718 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1721 trace_savevm_section_start();
1723 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1724 qemu_put_be32(f
, se
->section_id
);
1727 len
= strlen(se
->idstr
);
1728 qemu_put_byte(f
, len
);
1729 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1731 qemu_put_be32(f
, se
->instance_id
);
1732 qemu_put_be32(f
, se
->version_id
);
1734 vmstate_save(f
, se
);
1735 trace_savevm_section_end(se
->section_id
);
1738 qemu_put_byte(f
, QEMU_VM_EOF
);
1742 uint64_t qemu_savevm_state_pending(QEMUFile
*f
, uint64_t max_size
)
1747 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1748 if (!se
->ops
|| !se
->ops
->save_live_pending
) {
1751 if (se
->ops
&& se
->ops
->is_active
) {
1752 if (!se
->ops
->is_active(se
->opaque
)) {
1756 ret
+= se
->ops
->save_live_pending(f
, se
->opaque
, max_size
);
1761 void qemu_savevm_state_cancel(void)
1765 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1766 if (se
->ops
&& se
->ops
->cancel
) {
1767 se
->ops
->cancel(se
->opaque
);
1772 static int qemu_savevm_state(QEMUFile
*f
)
1775 MigrationParams params
= {
1780 if (qemu_savevm_state_blocked(NULL
)) {
1784 qemu_mutex_unlock_iothread();
1785 qemu_savevm_state_begin(f
, ¶ms
);
1786 qemu_mutex_lock_iothread();
1788 while (qemu_file_get_error(f
) == 0) {
1789 if (qemu_savevm_state_iterate(f
) > 0) {
1794 ret
= qemu_file_get_error(f
);
1796 qemu_savevm_state_complete(f
);
1797 ret
= qemu_file_get_error(f
);
1800 qemu_savevm_state_cancel();
1805 static int qemu_save_device_state(QEMUFile
*f
)
1809 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1810 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1812 cpu_synchronize_all_states();
1814 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1820 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1825 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1826 qemu_put_be32(f
, se
->section_id
);
1829 len
= strlen(se
->idstr
);
1830 qemu_put_byte(f
, len
);
1831 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1833 qemu_put_be32(f
, se
->instance_id
);
1834 qemu_put_be32(f
, se
->version_id
);
1836 vmstate_save(f
, se
);
1839 qemu_put_byte(f
, QEMU_VM_EOF
);
1841 return qemu_file_get_error(f
);
1844 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1848 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1849 if (!strcmp(se
->idstr
, idstr
) &&
1850 (instance_id
== se
->instance_id
||
1851 instance_id
== se
->alias_id
))
1853 /* Migrating from an older version? */
1854 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1855 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1856 (instance_id
== se
->compat
->instance_id
||
1857 instance_id
== se
->alias_id
))
1864 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1866 while(sub
&& sub
->needed
) {
1867 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1875 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1878 while (qemu_peek_byte(f
, 0) == QEMU_VM_SUBSECTION
) {
1881 uint8_t version_id
, len
, size
;
1882 const VMStateDescription
*sub_vmsd
;
1884 len
= qemu_peek_byte(f
, 1);
1885 if (len
< strlen(vmsd
->name
) + 1) {
1886 /* subsection name has be be "section_name/a" */
1889 size
= qemu_peek_buffer(f
, (uint8_t *)idstr
, len
, 2);
1895 if (strncmp(vmsd
->name
, idstr
, strlen(vmsd
->name
)) != 0) {
1896 /* it don't have a valid subsection name */
1899 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1900 if (sub_vmsd
== NULL
) {
1903 qemu_file_skip(f
, 1); /* subsection */
1904 qemu_file_skip(f
, 1); /* len */
1905 qemu_file_skip(f
, len
); /* idstr */
1906 version_id
= qemu_get_be32(f
);
1908 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1916 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1919 const VMStateSubsection
*sub
= vmsd
->subsections
;
1921 while (sub
&& sub
->needed
) {
1922 if (sub
->needed(opaque
)) {
1923 const VMStateDescription
*vmsd
= sub
->vmsd
;
1926 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1927 len
= strlen(vmsd
->name
);
1928 qemu_put_byte(f
, len
);
1929 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1930 qemu_put_be32(f
, vmsd
->version_id
);
1931 vmstate_save_state(f
, vmsd
, opaque
);
1937 typedef struct LoadStateEntry
{
1938 QLIST_ENTRY(LoadStateEntry
) entry
;
1944 int qemu_loadvm_state(QEMUFile
*f
)
1946 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1947 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1948 LoadStateEntry
*le
, *new_le
;
1949 uint8_t section_type
;
1953 if (qemu_savevm_state_blocked(NULL
)) {
1957 v
= qemu_get_be32(f
);
1958 if (v
!= QEMU_VM_FILE_MAGIC
)
1961 v
= qemu_get_be32(f
);
1962 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1963 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1966 if (v
!= QEMU_VM_FILE_VERSION
)
1969 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1970 uint32_t instance_id
, version_id
, section_id
;
1975 switch (section_type
) {
1976 case QEMU_VM_SECTION_START
:
1977 case QEMU_VM_SECTION_FULL
:
1978 /* Read section start */
1979 section_id
= qemu_get_be32(f
);
1980 len
= qemu_get_byte(f
);
1981 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1983 instance_id
= qemu_get_be32(f
);
1984 version_id
= qemu_get_be32(f
);
1986 /* Find savevm section */
1987 se
= find_se(idstr
, instance_id
);
1989 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1994 /* Validate version */
1995 if (version_id
> se
->version_id
) {
1996 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1997 version_id
, idstr
, se
->version_id
);
2003 le
= g_malloc0(sizeof(*le
));
2006 le
->section_id
= section_id
;
2007 le
->version_id
= version_id
;
2008 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
2010 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2012 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
2013 instance_id
, idstr
);
2017 case QEMU_VM_SECTION_PART
:
2018 case QEMU_VM_SECTION_END
:
2019 section_id
= qemu_get_be32(f
);
2021 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
2022 if (le
->section_id
== section_id
) {
2027 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
2032 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2034 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
2040 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
2046 cpu_synchronize_all_post_init();
2051 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
2052 QLIST_REMOVE(le
, entry
);
2057 ret
= qemu_file_get_error(f
);
2063 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
2066 QEMUSnapshotInfo
*sn_tab
, *sn
;
2070 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2073 for(i
= 0; i
< nb_sns
; i
++) {
2075 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
2086 * Deletes snapshots of a given name in all opened images.
2088 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
2090 BlockDriverState
*bs
;
2091 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
2095 while ((bs
= bdrv_next(bs
))) {
2096 if (bdrv_can_snapshot(bs
) &&
2097 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
2099 ret
= bdrv_snapshot_delete(bs
, name
);
2102 "Error while deleting snapshot on '%s'\n",
2103 bdrv_get_device_name(bs
));
2112 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
2114 BlockDriverState
*bs
, *bs1
;
2115 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
2118 int saved_vm_running
;
2119 uint64_t vm_state_size
;
2122 const char *name
= qdict_get_try_str(qdict
, "name");
2124 /* Verify if there is a device that doesn't support snapshots and is writable */
2126 while ((bs
= bdrv_next(bs
))) {
2128 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2132 if (!bdrv_can_snapshot(bs
)) {
2133 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2134 bdrv_get_device_name(bs
));
2139 bs
= bdrv_snapshots();
2141 monitor_printf(mon
, "No block device can accept snapshots\n");
2145 saved_vm_running
= runstate_is_running();
2146 vm_stop(RUN_STATE_SAVE_VM
);
2148 memset(sn
, 0, sizeof(*sn
));
2150 /* fill auxiliary fields */
2151 qemu_gettimeofday(&tv
);
2152 sn
->date_sec
= tv
.tv_sec
;
2153 sn
->date_nsec
= tv
.tv_usec
* 1000;
2154 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2157 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2159 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2160 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2162 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2165 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2166 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2167 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2170 /* Delete old snapshots of the same name */
2171 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2175 /* save the VM state */
2176 f
= qemu_fopen_bdrv(bs
, 1);
2178 monitor_printf(mon
, "Could not open VM state file\n");
2181 ret
= qemu_savevm_state(f
);
2182 vm_state_size
= qemu_ftell(f
);
2185 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2189 /* create the snapshots */
2192 while ((bs1
= bdrv_next(bs1
))) {
2193 if (bdrv_can_snapshot(bs1
)) {
2194 /* Write VM state size only to the image that contains the state */
2195 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2196 ret
= bdrv_snapshot_create(bs1
, sn
);
2198 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2199 bdrv_get_device_name(bs1
));
2205 if (saved_vm_running
)
2209 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2212 int saved_vm_running
;
2215 saved_vm_running
= runstate_is_running();
2216 vm_stop(RUN_STATE_SAVE_VM
);
2218 f
= qemu_fopen(filename
, "wb");
2220 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2223 ret
= qemu_save_device_state(f
);
2226 error_set(errp
, QERR_IO_ERROR
);
2230 if (saved_vm_running
)
2234 int load_vmstate(const char *name
)
2236 BlockDriverState
*bs
, *bs_vm_state
;
2237 QEMUSnapshotInfo sn
;
2241 bs_vm_state
= bdrv_snapshots();
2243 error_report("No block device supports snapshots");
2247 /* Don't even try to load empty VM states */
2248 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2251 } else if (sn
.vm_state_size
== 0) {
2252 error_report("This is a disk-only snapshot. Revert to it offline "
2257 /* Verify if there is any device that doesn't support snapshots and is
2258 writable and check if the requested snapshot is available too. */
2260 while ((bs
= bdrv_next(bs
))) {
2262 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2266 if (!bdrv_can_snapshot(bs
)) {
2267 error_report("Device '%s' is writable but does not support snapshots.",
2268 bdrv_get_device_name(bs
));
2272 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2274 error_report("Device '%s' does not have the requested snapshot '%s'",
2275 bdrv_get_device_name(bs
), name
);
2280 /* Flush all IO requests so they don't interfere with the new state. */
2284 while ((bs
= bdrv_next(bs
))) {
2285 if (bdrv_can_snapshot(bs
)) {
2286 ret
= bdrv_snapshot_goto(bs
, name
);
2288 error_report("Error %d while activating snapshot '%s' on '%s'",
2289 ret
, name
, bdrv_get_device_name(bs
));
2295 /* restore the VM state */
2296 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2298 error_report("Could not open VM state file");
2302 qemu_system_reset(VMRESET_SILENT
);
2303 ret
= qemu_loadvm_state(f
);
2307 error_report("Error %d while loading VM state", ret
);
2314 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2316 BlockDriverState
*bs
, *bs1
;
2318 const char *name
= qdict_get_str(qdict
, "name");
2320 bs
= bdrv_snapshots();
2322 monitor_printf(mon
, "No block device supports snapshots\n");
2327 while ((bs1
= bdrv_next(bs1
))) {
2328 if (bdrv_can_snapshot(bs1
)) {
2329 ret
= bdrv_snapshot_delete(bs1
, name
);
2331 if (ret
== -ENOTSUP
)
2333 "Snapshots not supported on device '%s'\n",
2334 bdrv_get_device_name(bs1
));
2336 monitor_printf(mon
, "Error %d while deleting snapshot on "
2337 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2343 void do_info_snapshots(Monitor
*mon
, const QDict
*qdict
)
2345 BlockDriverState
*bs
, *bs1
;
2346 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2347 int nb_sns
, i
, ret
, available
;
2349 int *available_snapshots
;
2352 bs
= bdrv_snapshots();
2354 monitor_printf(mon
, "No available block device supports snapshots\n");
2358 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2360 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2365 monitor_printf(mon
, "There is no snapshot available.\n");
2369 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2371 for (i
= 0; i
< nb_sns
; i
++) {
2376 while ((bs1
= bdrv_next(bs1
))) {
2377 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2378 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2387 available_snapshots
[total
] = i
;
2393 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2394 for (i
= 0; i
< total
; i
++) {
2395 sn
= &sn_tab
[available_snapshots
[i
]];
2396 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2399 monitor_printf(mon
, "There is no suitable snapshot available\n");
2403 g_free(available_snapshots
);
2407 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2409 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2410 memory_region_name(mr
), dev
);
2413 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2415 /* Nothing do to while the implementation is in RAMBlock */
2418 void vmstate_register_ram_global(MemoryRegion
*mr
)
2420 vmstate_register_ram(mr
, NULL
);