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 void qemu_file_set_error(QEMUFile
*f
, int ret
)
448 if (f
->last_error
== 0) {
453 /** Flushes QEMUFile buffer
456 void 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
;
471 qemu_file_set_error(f
, ret
);
475 static void qemu_fill_buffer(QEMUFile
*f
)
480 if (!f
->ops
->get_buffer
)
486 pending
= f
->buf_size
- f
->buf_index
;
488 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
491 f
->buf_size
= pending
;
493 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
494 IO_BUF_SIZE
- pending
);
497 f
->buf_offset
+= len
;
498 } else if (len
== 0) {
499 qemu_file_set_error(f
, -EIO
);
500 } else if (len
!= -EAGAIN
)
501 qemu_file_set_error(f
, len
);
504 int qemu_get_fd(QEMUFile
*f
)
506 if (f
->ops
->get_fd
) {
507 return f
->ops
->get_fd(f
->opaque
);
514 * Returns negative error value if any error happened on previous operations or
515 * while closing the file. Returns 0 or positive number on success.
517 * The meaning of return value on success depends on the specific backend
520 int qemu_fclose(QEMUFile
*f
)
524 ret
= qemu_file_get_error(f
);
527 int ret2
= f
->ops
->close(f
->opaque
);
532 /* If any error was spotted before closing, we should report it
533 * instead of the close() return value.
542 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
550 if (f
->is_write
== 0 && f
->buf_index
> 0) {
552 "Attempted to write to buffer while read buffer is not empty\n");
557 l
= IO_BUF_SIZE
- f
->buf_index
;
560 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
565 if (f
->buf_index
>= IO_BUF_SIZE
) {
567 if (qemu_file_get_error(f
)) {
574 void qemu_put_byte(QEMUFile
*f
, int v
)
580 if (f
->is_write
== 0 && f
->buf_index
> 0) {
582 "Attempted to write to buffer while read buffer is not empty\n");
586 f
->buf
[f
->buf_index
++] = v
;
588 if (f
->buf_index
>= IO_BUF_SIZE
) {
593 static void qemu_file_skip(QEMUFile
*f
, int size
)
595 if (f
->buf_index
+ size
<= f
->buf_size
) {
596 f
->buf_index
+= size
;
600 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
609 index
= f
->buf_index
+ offset
;
610 pending
= f
->buf_size
- index
;
611 if (pending
< size
) {
613 index
= f
->buf_index
+ offset
;
614 pending
= f
->buf_size
- index
;
620 if (size
> pending
) {
624 memcpy(buf
, f
->buf
+ index
, size
);
628 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
633 while (pending
> 0) {
636 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
640 qemu_file_skip(f
, res
);
648 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
650 int index
= f
->buf_index
+ offset
;
656 if (index
>= f
->buf_size
) {
658 index
= f
->buf_index
+ offset
;
659 if (index
>= f
->buf_size
) {
663 return f
->buf
[index
];
666 int qemu_get_byte(QEMUFile
*f
)
670 result
= qemu_peek_byte(f
, 0);
671 qemu_file_skip(f
, 1);
675 int64_t qemu_ftell(QEMUFile
*f
)
677 /* buf_offset excludes buffer for writing but includes it for reading */
679 return f
->buf_offset
+ f
->buf_index
;
681 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
685 int qemu_file_rate_limit(QEMUFile
*f
)
687 if (f
->ops
->rate_limit
)
688 return f
->ops
->rate_limit(f
->opaque
);
693 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
695 if (f
->ops
->get_rate_limit
)
696 return f
->ops
->get_rate_limit(f
->opaque
);
701 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
703 /* any failed or completed migration keeps its state to allow probing of
704 * migration data, but has no associated file anymore */
705 if (f
&& f
->ops
->set_rate_limit
)
706 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
711 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
713 qemu_put_byte(f
, v
>> 8);
717 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
719 qemu_put_byte(f
, v
>> 24);
720 qemu_put_byte(f
, v
>> 16);
721 qemu_put_byte(f
, v
>> 8);
725 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
727 qemu_put_be32(f
, v
>> 32);
731 unsigned int qemu_get_be16(QEMUFile
*f
)
734 v
= qemu_get_byte(f
) << 8;
735 v
|= qemu_get_byte(f
);
739 unsigned int qemu_get_be32(QEMUFile
*f
)
742 v
= qemu_get_byte(f
) << 24;
743 v
|= qemu_get_byte(f
) << 16;
744 v
|= qemu_get_byte(f
) << 8;
745 v
|= qemu_get_byte(f
);
749 uint64_t qemu_get_be64(QEMUFile
*f
)
752 v
= (uint64_t)qemu_get_be32(f
) << 32;
753 v
|= qemu_get_be32(f
);
760 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
762 uint64_t expire_time
;
764 expire_time
= qemu_timer_expire_time_ns(ts
);
765 qemu_put_be64(f
, expire_time
);
768 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
770 uint64_t expire_time
;
772 expire_time
= qemu_get_be64(f
);
773 if (expire_time
!= -1) {
774 qemu_mod_timer_ns(ts
, expire_time
);
783 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
786 *v
= qemu_get_byte(f
);
790 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
793 qemu_put_byte(f
, *v
);
796 const VMStateInfo vmstate_info_bool
= {
804 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
811 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
817 const VMStateInfo vmstate_info_int8
= {
825 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
828 qemu_get_sbe16s(f
, v
);
832 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
835 qemu_put_sbe16s(f
, v
);
838 const VMStateInfo vmstate_info_int16
= {
846 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
849 qemu_get_sbe32s(f
, v
);
853 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
856 qemu_put_sbe32s(f
, v
);
859 const VMStateInfo vmstate_info_int32
= {
865 /* 32 bit int. See that the received value is the same than the one
868 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
872 qemu_get_sbe32s(f
, &v2
);
879 const VMStateInfo vmstate_info_int32_equal
= {
880 .name
= "int32 equal",
881 .get
= get_int32_equal
,
885 /* 32 bit int. See that the received value is the less or the same
886 than the one in the field */
888 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
892 qemu_get_sbe32s(f
, &new);
899 const VMStateInfo vmstate_info_int32_le
= {
900 .name
= "int32 equal",
907 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
910 qemu_get_sbe64s(f
, v
);
914 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
917 qemu_put_sbe64s(f
, v
);
920 const VMStateInfo vmstate_info_int64
= {
926 /* 8 bit unsigned int */
928 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
935 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
941 const VMStateInfo vmstate_info_uint8
= {
947 /* 16 bit unsigned int */
949 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
952 qemu_get_be16s(f
, v
);
956 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
959 qemu_put_be16s(f
, v
);
962 const VMStateInfo vmstate_info_uint16
= {
968 /* 32 bit unsigned int */
970 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
973 qemu_get_be32s(f
, v
);
977 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
980 qemu_put_be32s(f
, v
);
983 const VMStateInfo vmstate_info_uint32
= {
989 /* 32 bit uint. See that the received value is the same than the one
992 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
996 qemu_get_be32s(f
, &v2
);
1004 const VMStateInfo vmstate_info_uint32_equal
= {
1005 .name
= "uint32 equal",
1006 .get
= get_uint32_equal
,
1010 /* 64 bit unsigned int */
1012 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1015 qemu_get_be64s(f
, v
);
1019 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1022 qemu_put_be64s(f
, v
);
1025 const VMStateInfo vmstate_info_uint64
= {
1031 /* 8 bit int. See that the received value is the same than the one
1034 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1038 qemu_get_8s(f
, &v2
);
1045 const VMStateInfo vmstate_info_uint8_equal
= {
1046 .name
= "uint8 equal",
1047 .get
= get_uint8_equal
,
1051 /* 16 bit unsigned int int. See that the received value is the same than the one
1054 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1058 qemu_get_be16s(f
, &v2
);
1065 const VMStateInfo vmstate_info_uint16_equal
= {
1066 .name
= "uint16 equal",
1067 .get
= get_uint16_equal
,
1073 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1076 qemu_get_timer(f
, v
);
1080 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1083 qemu_put_timer(f
, v
);
1086 const VMStateInfo vmstate_info_timer
= {
1092 /* uint8_t buffers */
1094 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1097 qemu_get_buffer(f
, v
, size
);
1101 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1104 qemu_put_buffer(f
, v
, size
);
1107 const VMStateInfo vmstate_info_buffer
= {
1113 /* unused buffers: space that was used for some fields that are
1114 not useful anymore */
1116 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1122 block_len
= MIN(sizeof(buf
), size
);
1124 qemu_get_buffer(f
, buf
, block_len
);
1129 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1131 static const uint8_t buf
[1024];
1135 block_len
= MIN(sizeof(buf
), size
);
1137 qemu_put_buffer(f
, buf
, block_len
);
1141 const VMStateInfo vmstate_info_unused_buffer
= {
1142 .name
= "unused_buffer",
1143 .get
= get_unused_buffer
,
1144 .put
= put_unused_buffer
,
1147 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1148 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1149 * bit words with the bits in big endian order. The in-memory format
1150 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1152 /* This is the number of 64 bit words sent over the wire */
1153 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1154 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1156 unsigned long *bmp
= pv
;
1158 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1159 uint64_t w
= qemu_get_be64(f
);
1161 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1162 bmp
[idx
++] = w
>> 32;
1168 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1170 unsigned long *bmp
= pv
;
1172 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1173 uint64_t w
= bmp
[idx
++];
1174 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1175 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1177 qemu_put_be64(f
, w
);
1181 const VMStateInfo vmstate_info_bitmap
= {
1187 typedef struct CompatEntry
{
1192 typedef struct SaveStateEntry
{
1193 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1199 SaveVMHandlers
*ops
;
1200 const VMStateDescription
*vmsd
;
1202 CompatEntry
*compat
;
1208 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1209 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1210 static int global_section_id
;
1212 static int calculate_new_instance_id(const char *idstr
)
1215 int instance_id
= 0;
1217 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1218 if (strcmp(idstr
, se
->idstr
) == 0
1219 && instance_id
<= se
->instance_id
) {
1220 instance_id
= se
->instance_id
+ 1;
1226 static int calculate_compat_instance_id(const char *idstr
)
1229 int instance_id
= 0;
1231 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1235 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1236 && instance_id
<= se
->compat
->instance_id
) {
1237 instance_id
= se
->compat
->instance_id
+ 1;
1243 /* TODO: Individual devices generally have very little idea about the rest
1244 of the system, so instance_id should be removed/replaced.
1245 Meanwhile pass -1 as instance_id if you do not already have a clearly
1246 distinguishing id for all instances of your device class. */
1247 int register_savevm_live(DeviceState
*dev
,
1251 SaveVMHandlers
*ops
,
1256 se
= g_malloc0(sizeof(SaveStateEntry
));
1257 se
->version_id
= version_id
;
1258 se
->section_id
= global_section_id
++;
1260 se
->opaque
= opaque
;
1263 /* if this is a live_savem then set is_ram */
1264 if (ops
->save_live_setup
!= NULL
) {
1269 char *id
= qdev_get_dev_path(dev
);
1271 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1272 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1275 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1276 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1277 se
->compat
->instance_id
= instance_id
== -1 ?
1278 calculate_compat_instance_id(idstr
) : instance_id
;
1282 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1284 if (instance_id
== -1) {
1285 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1287 se
->instance_id
= instance_id
;
1289 assert(!se
->compat
|| se
->instance_id
== 0);
1290 /* add at the end of list */
1291 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1295 int register_savevm(DeviceState
*dev
,
1299 SaveStateHandler
*save_state
,
1300 LoadStateHandler
*load_state
,
1303 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1304 ops
->save_state
= save_state
;
1305 ops
->load_state
= load_state
;
1306 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1310 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1312 SaveStateEntry
*se
, *new_se
;
1316 char *path
= qdev_get_dev_path(dev
);
1318 pstrcpy(id
, sizeof(id
), path
);
1319 pstrcat(id
, sizeof(id
), "/");
1323 pstrcat(id
, sizeof(id
), idstr
);
1325 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1326 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1327 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1337 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1338 const VMStateDescription
*vmsd
,
1339 void *opaque
, int alias_id
,
1340 int required_for_version
)
1344 /* If this triggers, alias support can be dropped for the vmsd. */
1345 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1347 se
= g_malloc0(sizeof(SaveStateEntry
));
1348 se
->version_id
= vmsd
->version_id
;
1349 se
->section_id
= global_section_id
++;
1350 se
->opaque
= opaque
;
1352 se
->alias_id
= alias_id
;
1353 se
->no_migrate
= vmsd
->unmigratable
;
1356 char *id
= qdev_get_dev_path(dev
);
1358 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1359 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1362 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1363 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1364 se
->compat
->instance_id
= instance_id
== -1 ?
1365 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1369 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1371 if (instance_id
== -1) {
1372 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1374 se
->instance_id
= instance_id
;
1376 assert(!se
->compat
|| se
->instance_id
== 0);
1377 /* add at the end of list */
1378 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1382 int vmstate_register(DeviceState
*dev
, int instance_id
,
1383 const VMStateDescription
*vmsd
, void *opaque
)
1385 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1389 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1392 SaveStateEntry
*se
, *new_se
;
1394 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1395 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1396 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1405 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1407 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1410 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1411 void *opaque
, int version_id
)
1413 VMStateField
*field
= vmsd
->fields
;
1416 if (version_id
> vmsd
->version_id
) {
1419 if (version_id
< vmsd
->minimum_version_id_old
) {
1422 if (version_id
< vmsd
->minimum_version_id
) {
1423 return vmsd
->load_state_old(f
, opaque
, version_id
);
1425 if (vmsd
->pre_load
) {
1426 int ret
= vmsd
->pre_load(opaque
);
1430 while(field
->name
) {
1431 if ((field
->field_exists
&&
1432 field
->field_exists(opaque
, version_id
)) ||
1433 (!field
->field_exists
&&
1434 field
->version_id
<= version_id
)) {
1435 void *base_addr
= opaque
+ field
->offset
;
1437 int size
= field
->size
;
1439 if (field
->flags
& VMS_VBUFFER
) {
1440 size
= *(int32_t *)(opaque
+field
->size_offset
);
1441 if (field
->flags
& VMS_MULTIPLY
) {
1442 size
*= field
->size
;
1445 if (field
->flags
& VMS_ARRAY
) {
1446 n_elems
= field
->num
;
1447 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1448 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1449 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1450 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1451 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1452 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1453 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1454 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1456 if (field
->flags
& VMS_POINTER
) {
1457 base_addr
= *(void **)base_addr
+ field
->start
;
1459 for (i
= 0; i
< n_elems
; i
++) {
1460 void *addr
= base_addr
+ size
* i
;
1462 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1463 addr
= *(void **)addr
;
1465 if (field
->flags
& VMS_STRUCT
) {
1466 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1468 ret
= field
->info
->get(f
, addr
, size
);
1478 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1482 if (vmsd
->post_load
) {
1483 return vmsd
->post_load(opaque
, version_id
);
1488 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1491 VMStateField
*field
= vmsd
->fields
;
1493 if (vmsd
->pre_save
) {
1494 vmsd
->pre_save(opaque
);
1496 while(field
->name
) {
1497 if (!field
->field_exists
||
1498 field
->field_exists(opaque
, vmsd
->version_id
)) {
1499 void *base_addr
= opaque
+ field
->offset
;
1501 int size
= field
->size
;
1503 if (field
->flags
& VMS_VBUFFER
) {
1504 size
= *(int32_t *)(opaque
+field
->size_offset
);
1505 if (field
->flags
& VMS_MULTIPLY
) {
1506 size
*= field
->size
;
1509 if (field
->flags
& VMS_ARRAY
) {
1510 n_elems
= field
->num
;
1511 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1512 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1513 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1514 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1515 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1516 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1517 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1518 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1520 if (field
->flags
& VMS_POINTER
) {
1521 base_addr
= *(void **)base_addr
+ field
->start
;
1523 for (i
= 0; i
< n_elems
; i
++) {
1524 void *addr
= base_addr
+ size
* i
;
1526 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1527 addr
= *(void **)addr
;
1529 if (field
->flags
& VMS_STRUCT
) {
1530 vmstate_save_state(f
, field
->vmsd
, addr
);
1532 field
->info
->put(f
, addr
, size
);
1538 vmstate_subsection_save(f
, vmsd
, opaque
);
1541 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1543 if (!se
->vmsd
) { /* Old style */
1544 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1546 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1549 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1551 if (!se
->vmsd
) { /* Old style */
1552 se
->ops
->save_state(f
, se
->opaque
);
1555 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1558 #define QEMU_VM_FILE_MAGIC 0x5145564d
1559 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1560 #define QEMU_VM_FILE_VERSION 0x00000003
1562 #define QEMU_VM_EOF 0x00
1563 #define QEMU_VM_SECTION_START 0x01
1564 #define QEMU_VM_SECTION_PART 0x02
1565 #define QEMU_VM_SECTION_END 0x03
1566 #define QEMU_VM_SECTION_FULL 0x04
1567 #define QEMU_VM_SUBSECTION 0x05
1569 bool qemu_savevm_state_blocked(Error
**errp
)
1573 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1574 if (se
->no_migrate
) {
1575 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1582 void qemu_savevm_state_begin(QEMUFile
*f
,
1583 const MigrationParams
*params
)
1588 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1589 if (!se
->ops
|| !se
->ops
->set_params
) {
1592 se
->ops
->set_params(params
, se
->opaque
);
1595 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1596 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1598 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1601 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1604 if (se
->ops
&& se
->ops
->is_active
) {
1605 if (!se
->ops
->is_active(se
->opaque
)) {
1610 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1611 qemu_put_be32(f
, se
->section_id
);
1614 len
= strlen(se
->idstr
);
1615 qemu_put_byte(f
, len
);
1616 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1618 qemu_put_be32(f
, se
->instance_id
);
1619 qemu_put_be32(f
, se
->version_id
);
1621 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1623 qemu_file_set_error(f
, ret
);
1630 * this function has three return values:
1631 * negative: there was one error, and we have -errno.
1632 * 0 : We haven't finished, caller have to go again
1633 * 1 : We have finished, we can go to complete phase
1635 int qemu_savevm_state_iterate(QEMUFile
*f
)
1640 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1641 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1644 if (se
->ops
&& se
->ops
->is_active
) {
1645 if (!se
->ops
->is_active(se
->opaque
)) {
1649 if (qemu_file_rate_limit(f
)) {
1652 trace_savevm_section_start();
1654 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1655 qemu_put_be32(f
, se
->section_id
);
1657 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1658 trace_savevm_section_end(se
->section_id
);
1661 qemu_file_set_error(f
, ret
);
1664 /* Do not proceed to the next vmstate before this one reported
1665 completion of the current stage. This serializes the migration
1666 and reduces the probability that a faster changing state is
1667 synchronized over and over again. */
1674 void qemu_savevm_state_complete(QEMUFile
*f
)
1679 cpu_synchronize_all_states();
1681 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1682 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1685 if (se
->ops
&& se
->ops
->is_active
) {
1686 if (!se
->ops
->is_active(se
->opaque
)) {
1690 trace_savevm_section_start();
1692 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1693 qemu_put_be32(f
, se
->section_id
);
1695 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1696 trace_savevm_section_end(se
->section_id
);
1698 qemu_file_set_error(f
, ret
);
1703 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1706 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1709 trace_savevm_section_start();
1711 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1712 qemu_put_be32(f
, se
->section_id
);
1715 len
= strlen(se
->idstr
);
1716 qemu_put_byte(f
, len
);
1717 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1719 qemu_put_be32(f
, se
->instance_id
);
1720 qemu_put_be32(f
, se
->version_id
);
1722 vmstate_save(f
, se
);
1723 trace_savevm_section_end(se
->section_id
);
1726 qemu_put_byte(f
, QEMU_VM_EOF
);
1729 uint64_t qemu_savevm_state_pending(QEMUFile
*f
, uint64_t max_size
)
1734 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1735 if (!se
->ops
|| !se
->ops
->save_live_pending
) {
1738 if (se
->ops
&& se
->ops
->is_active
) {
1739 if (!se
->ops
->is_active(se
->opaque
)) {
1743 ret
+= se
->ops
->save_live_pending(f
, se
->opaque
, max_size
);
1748 void qemu_savevm_state_cancel(void)
1752 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1753 if (se
->ops
&& se
->ops
->cancel
) {
1754 se
->ops
->cancel(se
->opaque
);
1759 static int qemu_savevm_state(QEMUFile
*f
)
1762 MigrationParams params
= {
1767 if (qemu_savevm_state_blocked(NULL
)) {
1771 qemu_savevm_state_begin(f
, ¶ms
);
1772 while (qemu_file_get_error(f
) == 0) {
1773 if (qemu_savevm_state_iterate(f
) > 0) {
1778 ret
= qemu_file_get_error(f
);
1780 qemu_savevm_state_complete(f
);
1781 ret
= qemu_file_get_error(f
);
1784 qemu_savevm_state_cancel();
1789 static int qemu_save_device_state(QEMUFile
*f
)
1793 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1794 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1796 cpu_synchronize_all_states();
1798 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1804 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1809 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1810 qemu_put_be32(f
, se
->section_id
);
1813 len
= strlen(se
->idstr
);
1814 qemu_put_byte(f
, len
);
1815 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1817 qemu_put_be32(f
, se
->instance_id
);
1818 qemu_put_be32(f
, se
->version_id
);
1820 vmstate_save(f
, se
);
1823 qemu_put_byte(f
, QEMU_VM_EOF
);
1825 return qemu_file_get_error(f
);
1828 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1832 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1833 if (!strcmp(se
->idstr
, idstr
) &&
1834 (instance_id
== se
->instance_id
||
1835 instance_id
== se
->alias_id
))
1837 /* Migrating from an older version? */
1838 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1839 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1840 (instance_id
== se
->compat
->instance_id
||
1841 instance_id
== se
->alias_id
))
1848 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1850 while(sub
&& sub
->needed
) {
1851 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1859 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1862 while (qemu_peek_byte(f
, 0) == QEMU_VM_SUBSECTION
) {
1865 uint8_t version_id
, len
, size
;
1866 const VMStateDescription
*sub_vmsd
;
1868 len
= qemu_peek_byte(f
, 1);
1869 if (len
< strlen(vmsd
->name
) + 1) {
1870 /* subsection name has be be "section_name/a" */
1873 size
= qemu_peek_buffer(f
, (uint8_t *)idstr
, len
, 2);
1879 if (strncmp(vmsd
->name
, idstr
, strlen(vmsd
->name
)) != 0) {
1880 /* it don't have a valid subsection name */
1883 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1884 if (sub_vmsd
== NULL
) {
1887 qemu_file_skip(f
, 1); /* subsection */
1888 qemu_file_skip(f
, 1); /* len */
1889 qemu_file_skip(f
, len
); /* idstr */
1890 version_id
= qemu_get_be32(f
);
1892 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1900 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1903 const VMStateSubsection
*sub
= vmsd
->subsections
;
1905 while (sub
&& sub
->needed
) {
1906 if (sub
->needed(opaque
)) {
1907 const VMStateDescription
*vmsd
= sub
->vmsd
;
1910 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1911 len
= strlen(vmsd
->name
);
1912 qemu_put_byte(f
, len
);
1913 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1914 qemu_put_be32(f
, vmsd
->version_id
);
1915 vmstate_save_state(f
, vmsd
, opaque
);
1921 typedef struct LoadStateEntry
{
1922 QLIST_ENTRY(LoadStateEntry
) entry
;
1928 int qemu_loadvm_state(QEMUFile
*f
)
1930 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1931 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1932 LoadStateEntry
*le
, *new_le
;
1933 uint8_t section_type
;
1937 if (qemu_savevm_state_blocked(NULL
)) {
1941 v
= qemu_get_be32(f
);
1942 if (v
!= QEMU_VM_FILE_MAGIC
)
1945 v
= qemu_get_be32(f
);
1946 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1947 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1950 if (v
!= QEMU_VM_FILE_VERSION
)
1953 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1954 uint32_t instance_id
, version_id
, section_id
;
1959 switch (section_type
) {
1960 case QEMU_VM_SECTION_START
:
1961 case QEMU_VM_SECTION_FULL
:
1962 /* Read section start */
1963 section_id
= qemu_get_be32(f
);
1964 len
= qemu_get_byte(f
);
1965 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1967 instance_id
= qemu_get_be32(f
);
1968 version_id
= qemu_get_be32(f
);
1970 /* Find savevm section */
1971 se
= find_se(idstr
, instance_id
);
1973 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1978 /* Validate version */
1979 if (version_id
> se
->version_id
) {
1980 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1981 version_id
, idstr
, se
->version_id
);
1987 le
= g_malloc0(sizeof(*le
));
1990 le
->section_id
= section_id
;
1991 le
->version_id
= version_id
;
1992 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
1994 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1996 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1997 instance_id
, idstr
);
2001 case QEMU_VM_SECTION_PART
:
2002 case QEMU_VM_SECTION_END
:
2003 section_id
= qemu_get_be32(f
);
2005 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
2006 if (le
->section_id
== section_id
) {
2011 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
2016 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2018 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
2024 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
2030 cpu_synchronize_all_post_init();
2035 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
2036 QLIST_REMOVE(le
, entry
);
2041 ret
= qemu_file_get_error(f
);
2047 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
2050 QEMUSnapshotInfo
*sn_tab
, *sn
;
2054 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2057 for(i
= 0; i
< nb_sns
; i
++) {
2059 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
2070 * Deletes snapshots of a given name in all opened images.
2072 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
2074 BlockDriverState
*bs
;
2075 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
2079 while ((bs
= bdrv_next(bs
))) {
2080 if (bdrv_can_snapshot(bs
) &&
2081 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
2083 ret
= bdrv_snapshot_delete(bs
, name
);
2086 "Error while deleting snapshot on '%s'\n",
2087 bdrv_get_device_name(bs
));
2096 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
2098 BlockDriverState
*bs
, *bs1
;
2099 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
2102 int saved_vm_running
;
2103 uint64_t vm_state_size
;
2106 const char *name
= qdict_get_try_str(qdict
, "name");
2108 /* Verify if there is a device that doesn't support snapshots and is writable */
2110 while ((bs
= bdrv_next(bs
))) {
2112 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2116 if (!bdrv_can_snapshot(bs
)) {
2117 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2118 bdrv_get_device_name(bs
));
2123 bs
= bdrv_snapshots();
2125 monitor_printf(mon
, "No block device can accept snapshots\n");
2129 saved_vm_running
= runstate_is_running();
2130 vm_stop(RUN_STATE_SAVE_VM
);
2132 memset(sn
, 0, sizeof(*sn
));
2134 /* fill auxiliary fields */
2135 qemu_gettimeofday(&tv
);
2136 sn
->date_sec
= tv
.tv_sec
;
2137 sn
->date_nsec
= tv
.tv_usec
* 1000;
2138 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2141 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2143 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2144 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2146 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2149 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2150 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2151 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2154 /* Delete old snapshots of the same name */
2155 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2159 /* save the VM state */
2160 f
= qemu_fopen_bdrv(bs
, 1);
2162 monitor_printf(mon
, "Could not open VM state file\n");
2165 ret
= qemu_savevm_state(f
);
2166 vm_state_size
= qemu_ftell(f
);
2169 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2173 /* create the snapshots */
2176 while ((bs1
= bdrv_next(bs1
))) {
2177 if (bdrv_can_snapshot(bs1
)) {
2178 /* Write VM state size only to the image that contains the state */
2179 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2180 ret
= bdrv_snapshot_create(bs1
, sn
);
2182 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2183 bdrv_get_device_name(bs1
));
2189 if (saved_vm_running
)
2193 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2196 int saved_vm_running
;
2199 saved_vm_running
= runstate_is_running();
2200 vm_stop(RUN_STATE_SAVE_VM
);
2202 f
= qemu_fopen(filename
, "wb");
2204 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2207 ret
= qemu_save_device_state(f
);
2210 error_set(errp
, QERR_IO_ERROR
);
2214 if (saved_vm_running
)
2218 int load_vmstate(const char *name
)
2220 BlockDriverState
*bs
, *bs_vm_state
;
2221 QEMUSnapshotInfo sn
;
2225 bs_vm_state
= bdrv_snapshots();
2227 error_report("No block device supports snapshots");
2231 /* Don't even try to load empty VM states */
2232 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2235 } else if (sn
.vm_state_size
== 0) {
2236 error_report("This is a disk-only snapshot. Revert to it offline "
2241 /* Verify if there is any device that doesn't support snapshots and is
2242 writable and check if the requested snapshot is available too. */
2244 while ((bs
= bdrv_next(bs
))) {
2246 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2250 if (!bdrv_can_snapshot(bs
)) {
2251 error_report("Device '%s' is writable but does not support snapshots.",
2252 bdrv_get_device_name(bs
));
2256 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2258 error_report("Device '%s' does not have the requested snapshot '%s'",
2259 bdrv_get_device_name(bs
), name
);
2264 /* Flush all IO requests so they don't interfere with the new state. */
2268 while ((bs
= bdrv_next(bs
))) {
2269 if (bdrv_can_snapshot(bs
)) {
2270 ret
= bdrv_snapshot_goto(bs
, name
);
2272 error_report("Error %d while activating snapshot '%s' on '%s'",
2273 ret
, name
, bdrv_get_device_name(bs
));
2279 /* restore the VM state */
2280 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2282 error_report("Could not open VM state file");
2286 qemu_system_reset(VMRESET_SILENT
);
2287 ret
= qemu_loadvm_state(f
);
2291 error_report("Error %d while loading VM state", ret
);
2298 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2300 BlockDriverState
*bs
, *bs1
;
2302 const char *name
= qdict_get_str(qdict
, "name");
2304 bs
= bdrv_snapshots();
2306 monitor_printf(mon
, "No block device supports snapshots\n");
2311 while ((bs1
= bdrv_next(bs1
))) {
2312 if (bdrv_can_snapshot(bs1
)) {
2313 ret
= bdrv_snapshot_delete(bs1
, name
);
2315 if (ret
== -ENOTSUP
)
2317 "Snapshots not supported on device '%s'\n",
2318 bdrv_get_device_name(bs1
));
2320 monitor_printf(mon
, "Error %d while deleting snapshot on "
2321 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2327 void do_info_snapshots(Monitor
*mon
, const QDict
*qdict
)
2329 BlockDriverState
*bs
, *bs1
;
2330 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2331 int nb_sns
, i
, ret
, available
;
2333 int *available_snapshots
;
2336 bs
= bdrv_snapshots();
2338 monitor_printf(mon
, "No available block device supports snapshots\n");
2342 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2344 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2349 monitor_printf(mon
, "There is no snapshot available.\n");
2353 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2355 for (i
= 0; i
< nb_sns
; i
++) {
2360 while ((bs1
= bdrv_next(bs1
))) {
2361 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2362 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2371 available_snapshots
[total
] = i
;
2377 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2378 for (i
= 0; i
< total
; i
++) {
2379 sn
= &sn_tab
[available_snapshots
[i
]];
2380 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2383 monitor_printf(mon
, "There is no suitable snapshot available\n");
2387 g_free(available_snapshots
);
2391 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2393 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2394 memory_region_name(mr
), dev
);
2397 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2399 /* Nothing do to while the implementation is in RAMBlock */
2402 void vmstate_register_ram_global(MemoryRegion
*mr
)
2404 vmstate_register_ram(mr
, NULL
);