4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
31 /* Needed early for CONFIG_BSD etc. */
32 #include "config-host.h"
35 #include <sys/times.h>
39 #include <sys/ioctl.h>
40 #include <sys/resource.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
44 #include <arpa/inet.h>
47 #include <sys/select.h>
50 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
58 #include <linux/rtc.h>
66 #include <sys/timeb.h>
68 #define getopt_long_only getopt_long
69 #define memalign(align, size) malloc(size)
72 #include "qemu-common.h"
78 #include "qemu-timer.h"
79 #include "qemu-char.h"
80 #include "audio/audio.h"
81 #include "migration.h"
82 #include "qemu_socket.h"
83 #include "qemu-queue.h"
84 #include "qemu-timer.h"
87 #include "qmp-commands.h"
91 #define SELF_ANNOUNCE_ROUNDS 5
94 #define ETH_P_RARP 0x8035
96 #define ARP_HTYPE_ETH 0x0001
97 #define ARP_PTYPE_IP 0x0800
98 #define ARP_OP_REQUEST_REV 0x3
100 static int announce_self_create(uint8_t *buf
,
103 /* Ethernet header. */
104 memset(buf
, 0xff, 6); /* destination MAC addr */
105 memcpy(buf
+ 6, mac_addr
, 6); /* source MAC addr */
106 *(uint16_t *)(buf
+ 12) = htons(ETH_P_RARP
); /* ethertype */
109 *(uint16_t *)(buf
+ 14) = htons(ARP_HTYPE_ETH
); /* hardware addr space */
110 *(uint16_t *)(buf
+ 16) = htons(ARP_PTYPE_IP
); /* protocol addr space */
111 *(buf
+ 18) = 6; /* hardware addr length (ethernet) */
112 *(buf
+ 19) = 4; /* protocol addr length (IPv4) */
113 *(uint16_t *)(buf
+ 20) = htons(ARP_OP_REQUEST_REV
); /* opcode */
114 memcpy(buf
+ 22, mac_addr
, 6); /* source hw addr */
115 memset(buf
+ 28, 0x00, 4); /* source protocol addr */
116 memcpy(buf
+ 32, mac_addr
, 6); /* target hw addr */
117 memset(buf
+ 38, 0x00, 4); /* target protocol addr */
119 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
120 memset(buf
+ 42, 0x00, 18);
122 return 60; /* len (FCS will be added by hardware) */
125 static void qemu_announce_self_iter(NICState
*nic
, void *opaque
)
130 len
= announce_self_create(buf
, nic
->conf
->macaddr
.a
);
132 qemu_send_packet_raw(&nic
->nc
, buf
, len
);
136 static void qemu_announce_self_once(void *opaque
)
138 static int count
= SELF_ANNOUNCE_ROUNDS
;
139 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
141 qemu_foreach_nic(qemu_announce_self_iter
, NULL
);
144 /* delay 50ms, 150ms, 250ms, ... */
145 qemu_mod_timer(timer
, qemu_get_clock_ms(rt_clock
) +
146 50 + (SELF_ANNOUNCE_ROUNDS
- count
- 1) * 100);
148 qemu_del_timer(timer
);
149 qemu_free_timer(timer
);
153 void qemu_announce_self(void)
155 static QEMUTimer
*timer
;
156 timer
= qemu_new_timer_ms(rt_clock
, qemu_announce_self_once
, &timer
);
157 qemu_announce_self_once(&timer
);
160 /***********************************************************/
161 /* savevm/loadvm support */
163 #define IO_BUF_SIZE 32768
166 const QEMUFileOps
*ops
;
170 int64_t buf_offset
; /* start of buffer when writing, end of buffer
173 int buf_size
; /* 0 when writing */
174 uint8_t buf
[IO_BUF_SIZE
];
179 typedef struct QEMUFileStdio
185 typedef struct QEMUFileSocket
191 static int socket_get_fd(void *opaque
)
193 QEMUFileSocket
*s
= opaque
;
198 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
200 QEMUFileSocket
*s
= opaque
;
204 len
= qemu_recv(s
->fd
, buf
, size
, 0);
205 } while (len
== -1 && socket_error() == EINTR
);
208 len
= -socket_error();
213 static int socket_close(void *opaque
)
215 QEMUFileSocket
*s
= opaque
;
220 static int stdio_get_fd(void *opaque
)
222 QEMUFileStdio
*s
= opaque
;
224 return fileno(s
->stdio_file
);
227 static int stdio_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
229 QEMUFileStdio
*s
= opaque
;
230 return fwrite(buf
, 1, size
, s
->stdio_file
);
233 static int stdio_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
235 QEMUFileStdio
*s
= opaque
;
236 FILE *fp
= s
->stdio_file
;
241 bytes
= fread(buf
, 1, size
, fp
);
242 } while ((bytes
== 0) && ferror(fp
) && (errno
== EINTR
));
246 static int stdio_pclose(void *opaque
)
248 QEMUFileStdio
*s
= opaque
;
250 ret
= pclose(s
->stdio_file
);
258 static int stdio_fclose(void *opaque
)
260 QEMUFileStdio
*s
= opaque
;
262 if (fclose(s
->stdio_file
) == EOF
) {
269 static const QEMUFileOps stdio_pipe_read_ops
= {
270 .get_fd
= stdio_get_fd
,
271 .get_buffer
= stdio_get_buffer
,
272 .close
= stdio_pclose
275 static const QEMUFileOps stdio_pipe_write_ops
= {
276 .get_fd
= stdio_get_fd
,
277 .put_buffer
= stdio_put_buffer
,
278 .close
= stdio_pclose
281 QEMUFile
*qemu_popen(FILE *stdio_file
, const char *mode
)
285 if (stdio_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
286 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
290 s
= g_malloc0(sizeof(QEMUFileStdio
));
292 s
->stdio_file
= stdio_file
;
295 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_read_ops
);
297 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_write_ops
);
302 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
306 popen_file
= popen(command
, mode
);
307 if(popen_file
== NULL
) {
311 return qemu_popen(popen_file
, mode
);
314 int qemu_stdio_fd(QEMUFile
*f
)
319 p
= (QEMUFileStdio
*)f
->opaque
;
320 fd
= fileno(p
->stdio_file
);
325 static const QEMUFileOps stdio_file_read_ops
= {
326 .get_fd
= stdio_get_fd
,
327 .get_buffer
= stdio_get_buffer
,
328 .close
= stdio_fclose
331 static const QEMUFileOps stdio_file_write_ops
= {
332 .get_fd
= stdio_get_fd
,
333 .put_buffer
= stdio_put_buffer
,
334 .close
= stdio_fclose
337 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
342 (mode
[0] != 'r' && mode
[0] != 'w') ||
343 mode
[1] != 'b' || mode
[2] != 0) {
344 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
348 s
= g_malloc0(sizeof(QEMUFileStdio
));
349 s
->stdio_file
= fdopen(fd
, mode
);
354 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
356 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
365 static const QEMUFileOps socket_read_ops
= {
366 .get_fd
= socket_get_fd
,
367 .get_buffer
= socket_get_buffer
,
368 .close
= socket_close
371 QEMUFile
*qemu_fopen_socket(int fd
)
373 QEMUFileSocket
*s
= g_malloc0(sizeof(QEMUFileSocket
));
376 s
->file
= qemu_fopen_ops(s
, &socket_read_ops
);
380 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
385 (mode
[0] != 'r' && mode
[0] != 'w') ||
386 mode
[1] != 'b' || mode
[2] != 0) {
387 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
391 s
= g_malloc0(sizeof(QEMUFileStdio
));
393 s
->stdio_file
= fopen(filename
, mode
);
398 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
400 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
408 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
409 int64_t pos
, int size
)
411 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
415 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
417 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
420 static int bdrv_fclose(void *opaque
)
422 return bdrv_flush(opaque
);
425 static const QEMUFileOps bdrv_read_ops
= {
426 .get_buffer
= block_get_buffer
,
430 static const QEMUFileOps bdrv_write_ops
= {
431 .put_buffer
= block_put_buffer
,
435 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
438 return qemu_fopen_ops(bs
, &bdrv_write_ops
);
439 return qemu_fopen_ops(bs
, &bdrv_read_ops
);
442 QEMUFile
*qemu_fopen_ops(void *opaque
, const QEMUFileOps
*ops
)
446 f
= g_malloc0(sizeof(QEMUFile
));
455 int qemu_file_get_error(QEMUFile
*f
)
457 return f
->last_error
;
460 static void qemu_file_set_error(QEMUFile
*f
, int ret
)
465 /** Flushes QEMUFile buffer
468 static int 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
;
485 static void qemu_fill_buffer(QEMUFile
*f
)
490 if (!f
->ops
->get_buffer
)
496 pending
= f
->buf_size
- f
->buf_index
;
498 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
501 f
->buf_size
= pending
;
503 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
504 IO_BUF_SIZE
- pending
);
507 f
->buf_offset
+= len
;
508 } else if (len
== 0) {
509 qemu_file_set_error(f
, -EIO
);
510 } else if (len
!= -EAGAIN
)
511 qemu_file_set_error(f
, len
);
514 int qemu_get_fd(QEMUFile
*f
)
516 if (f
->ops
->get_fd
) {
517 return f
->ops
->get_fd(f
->opaque
);
524 * Returns negative error value if any error happened on previous operations or
525 * while closing the file. Returns 0 or positive number on success.
527 * The meaning of return value on success depends on the specific backend
530 int qemu_fclose(QEMUFile
*f
)
533 ret
= qemu_fflush(f
);
536 int ret2
= f
->ops
->close(f
->opaque
);
541 /* If any error was spotted before closing, we should report it
542 * instead of the close() return value.
551 int qemu_file_put_notify(QEMUFile
*f
)
553 return f
->ops
->put_buffer(f
->opaque
, NULL
, 0, 0);
556 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
564 if (f
->is_write
== 0 && f
->buf_index
> 0) {
566 "Attempted to write to buffer while read buffer is not empty\n");
571 l
= IO_BUF_SIZE
- f
->buf_index
;
574 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
579 if (f
->buf_index
>= IO_BUF_SIZE
) {
580 int ret
= qemu_fflush(f
);
582 qemu_file_set_error(f
, ret
);
589 void qemu_put_byte(QEMUFile
*f
, int v
)
595 if (f
->is_write
== 0 && f
->buf_index
> 0) {
597 "Attempted to write to buffer while read buffer is not empty\n");
601 f
->buf
[f
->buf_index
++] = v
;
603 if (f
->buf_index
>= IO_BUF_SIZE
) {
604 int ret
= qemu_fflush(f
);
606 qemu_file_set_error(f
, ret
);
611 static void qemu_file_skip(QEMUFile
*f
, int size
)
613 if (f
->buf_index
+ size
<= f
->buf_size
) {
614 f
->buf_index
+= size
;
618 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
627 index
= f
->buf_index
+ offset
;
628 pending
= f
->buf_size
- index
;
629 if (pending
< size
) {
631 index
= f
->buf_index
+ offset
;
632 pending
= f
->buf_size
- index
;
638 if (size
> pending
) {
642 memcpy(buf
, f
->buf
+ index
, size
);
646 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
651 while (pending
> 0) {
654 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
658 qemu_file_skip(f
, res
);
666 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
668 int index
= f
->buf_index
+ offset
;
674 if (index
>= f
->buf_size
) {
676 index
= f
->buf_index
+ offset
;
677 if (index
>= f
->buf_size
) {
681 return f
->buf
[index
];
684 int qemu_get_byte(QEMUFile
*f
)
688 result
= qemu_peek_byte(f
, 0);
689 qemu_file_skip(f
, 1);
693 static int64_t qemu_ftell(QEMUFile
*f
)
695 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
698 int qemu_file_rate_limit(QEMUFile
*f
)
700 if (f
->ops
->rate_limit
)
701 return f
->ops
->rate_limit(f
->opaque
);
706 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
708 if (f
->ops
->get_rate_limit
)
709 return f
->ops
->get_rate_limit(f
->opaque
);
714 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
716 /* any failed or completed migration keeps its state to allow probing of
717 * migration data, but has no associated file anymore */
718 if (f
&& f
->ops
->set_rate_limit
)
719 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
724 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
726 qemu_put_byte(f
, v
>> 8);
730 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
732 qemu_put_byte(f
, v
>> 24);
733 qemu_put_byte(f
, v
>> 16);
734 qemu_put_byte(f
, v
>> 8);
738 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
740 qemu_put_be32(f
, v
>> 32);
744 unsigned int qemu_get_be16(QEMUFile
*f
)
747 v
= qemu_get_byte(f
) << 8;
748 v
|= qemu_get_byte(f
);
752 unsigned int qemu_get_be32(QEMUFile
*f
)
755 v
= qemu_get_byte(f
) << 24;
756 v
|= qemu_get_byte(f
) << 16;
757 v
|= qemu_get_byte(f
) << 8;
758 v
|= qemu_get_byte(f
);
762 uint64_t qemu_get_be64(QEMUFile
*f
)
765 v
= (uint64_t)qemu_get_be32(f
) << 32;
766 v
|= qemu_get_be32(f
);
773 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
775 uint64_t expire_time
;
777 expire_time
= qemu_timer_expire_time_ns(ts
);
778 qemu_put_be64(f
, expire_time
);
781 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
783 uint64_t expire_time
;
785 expire_time
= qemu_get_be64(f
);
786 if (expire_time
!= -1) {
787 qemu_mod_timer_ns(ts
, expire_time
);
796 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
799 *v
= qemu_get_byte(f
);
803 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
806 qemu_put_byte(f
, *v
);
809 const VMStateInfo vmstate_info_bool
= {
817 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
824 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
830 const VMStateInfo vmstate_info_int8
= {
838 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
841 qemu_get_sbe16s(f
, v
);
845 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
848 qemu_put_sbe16s(f
, v
);
851 const VMStateInfo vmstate_info_int16
= {
859 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
862 qemu_get_sbe32s(f
, v
);
866 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
869 qemu_put_sbe32s(f
, v
);
872 const VMStateInfo vmstate_info_int32
= {
878 /* 32 bit int. See that the received value is the same than the one
881 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
885 qemu_get_sbe32s(f
, &v2
);
892 const VMStateInfo vmstate_info_int32_equal
= {
893 .name
= "int32 equal",
894 .get
= get_int32_equal
,
898 /* 32 bit int. See that the received value is the less or the same
899 than the one in the field */
901 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
905 qemu_get_sbe32s(f
, &new);
912 const VMStateInfo vmstate_info_int32_le
= {
913 .name
= "int32 equal",
920 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
923 qemu_get_sbe64s(f
, v
);
927 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
930 qemu_put_sbe64s(f
, v
);
933 const VMStateInfo vmstate_info_int64
= {
939 /* 8 bit unsigned int */
941 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
948 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
954 const VMStateInfo vmstate_info_uint8
= {
960 /* 16 bit unsigned int */
962 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
965 qemu_get_be16s(f
, v
);
969 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
972 qemu_put_be16s(f
, v
);
975 const VMStateInfo vmstate_info_uint16
= {
981 /* 32 bit unsigned int */
983 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
986 qemu_get_be32s(f
, v
);
990 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
993 qemu_put_be32s(f
, v
);
996 const VMStateInfo vmstate_info_uint32
= {
1002 /* 32 bit uint. See that the received value is the same than the one
1005 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
1009 qemu_get_be32s(f
, &v2
);
1017 const VMStateInfo vmstate_info_uint32_equal
= {
1018 .name
= "uint32 equal",
1019 .get
= get_uint32_equal
,
1023 /* 64 bit unsigned int */
1025 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1028 qemu_get_be64s(f
, v
);
1032 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1035 qemu_put_be64s(f
, v
);
1038 const VMStateInfo vmstate_info_uint64
= {
1044 /* 8 bit int. See that the received value is the same than the one
1047 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1051 qemu_get_8s(f
, &v2
);
1058 const VMStateInfo vmstate_info_uint8_equal
= {
1059 .name
= "uint8 equal",
1060 .get
= get_uint8_equal
,
1064 /* 16 bit unsigned int int. See that the received value is the same than the one
1067 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1071 qemu_get_be16s(f
, &v2
);
1078 const VMStateInfo vmstate_info_uint16_equal
= {
1079 .name
= "uint16 equal",
1080 .get
= get_uint16_equal
,
1086 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1089 qemu_get_timer(f
, v
);
1093 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1096 qemu_put_timer(f
, v
);
1099 const VMStateInfo vmstate_info_timer
= {
1105 /* uint8_t buffers */
1107 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1110 qemu_get_buffer(f
, v
, size
);
1114 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1117 qemu_put_buffer(f
, v
, size
);
1120 const VMStateInfo vmstate_info_buffer
= {
1126 /* unused buffers: space that was used for some fields that are
1127 not useful anymore */
1129 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1135 block_len
= MIN(sizeof(buf
), size
);
1137 qemu_get_buffer(f
, buf
, block_len
);
1142 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1144 static const uint8_t buf
[1024];
1148 block_len
= MIN(sizeof(buf
), size
);
1150 qemu_put_buffer(f
, buf
, block_len
);
1154 const VMStateInfo vmstate_info_unused_buffer
= {
1155 .name
= "unused_buffer",
1156 .get
= get_unused_buffer
,
1157 .put
= put_unused_buffer
,
1160 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1161 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1162 * bit words with the bits in big endian order. The in-memory format
1163 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1165 /* This is the number of 64 bit words sent over the wire */
1166 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1167 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1169 unsigned long *bmp
= pv
;
1171 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1172 uint64_t w
= qemu_get_be64(f
);
1174 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1175 bmp
[idx
++] = w
>> 32;
1181 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1183 unsigned long *bmp
= pv
;
1185 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1186 uint64_t w
= bmp
[idx
++];
1187 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1188 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1190 qemu_put_be64(f
, w
);
1194 const VMStateInfo vmstate_info_bitmap
= {
1200 typedef struct CompatEntry
{
1205 typedef struct SaveStateEntry
{
1206 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1212 SaveVMHandlers
*ops
;
1213 const VMStateDescription
*vmsd
;
1215 CompatEntry
*compat
;
1221 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1222 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1223 static int global_section_id
;
1225 static int calculate_new_instance_id(const char *idstr
)
1228 int instance_id
= 0;
1230 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1231 if (strcmp(idstr
, se
->idstr
) == 0
1232 && instance_id
<= se
->instance_id
) {
1233 instance_id
= se
->instance_id
+ 1;
1239 static int calculate_compat_instance_id(const char *idstr
)
1242 int instance_id
= 0;
1244 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1248 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1249 && instance_id
<= se
->compat
->instance_id
) {
1250 instance_id
= se
->compat
->instance_id
+ 1;
1256 /* TODO: Individual devices generally have very little idea about the rest
1257 of the system, so instance_id should be removed/replaced.
1258 Meanwhile pass -1 as instance_id if you do not already have a clearly
1259 distinguishing id for all instances of your device class. */
1260 int register_savevm_live(DeviceState
*dev
,
1264 SaveVMHandlers
*ops
,
1269 se
= g_malloc0(sizeof(SaveStateEntry
));
1270 se
->version_id
= version_id
;
1271 se
->section_id
= global_section_id
++;
1273 se
->opaque
= opaque
;
1276 /* if this is a live_savem then set is_ram */
1277 if (ops
->save_live_setup
!= NULL
) {
1282 char *id
= qdev_get_dev_path(dev
);
1284 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1285 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1288 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1289 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1290 se
->compat
->instance_id
= instance_id
== -1 ?
1291 calculate_compat_instance_id(idstr
) : instance_id
;
1295 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1297 if (instance_id
== -1) {
1298 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1300 se
->instance_id
= instance_id
;
1302 assert(!se
->compat
|| se
->instance_id
== 0);
1303 /* add at the end of list */
1304 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1308 int register_savevm(DeviceState
*dev
,
1312 SaveStateHandler
*save_state
,
1313 LoadStateHandler
*load_state
,
1316 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1317 ops
->save_state
= save_state
;
1318 ops
->load_state
= load_state
;
1319 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1323 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1325 SaveStateEntry
*se
, *new_se
;
1329 char *path
= qdev_get_dev_path(dev
);
1331 pstrcpy(id
, sizeof(id
), path
);
1332 pstrcat(id
, sizeof(id
), "/");
1336 pstrcat(id
, sizeof(id
), idstr
);
1338 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1339 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1340 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1350 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1351 const VMStateDescription
*vmsd
,
1352 void *opaque
, int alias_id
,
1353 int required_for_version
)
1357 /* If this triggers, alias support can be dropped for the vmsd. */
1358 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1360 se
= g_malloc0(sizeof(SaveStateEntry
));
1361 se
->version_id
= vmsd
->version_id
;
1362 se
->section_id
= global_section_id
++;
1363 se
->opaque
= opaque
;
1365 se
->alias_id
= alias_id
;
1366 se
->no_migrate
= vmsd
->unmigratable
;
1369 char *id
= qdev_get_dev_path(dev
);
1371 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1372 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1375 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1376 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1377 se
->compat
->instance_id
= instance_id
== -1 ?
1378 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1382 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1384 if (instance_id
== -1) {
1385 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1387 se
->instance_id
= instance_id
;
1389 assert(!se
->compat
|| se
->instance_id
== 0);
1390 /* add at the end of list */
1391 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1395 int vmstate_register(DeviceState
*dev
, int instance_id
,
1396 const VMStateDescription
*vmsd
, void *opaque
)
1398 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1402 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1405 SaveStateEntry
*se
, *new_se
;
1407 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1408 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1409 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1418 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1420 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1423 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1424 void *opaque
, int version_id
)
1426 VMStateField
*field
= vmsd
->fields
;
1429 if (version_id
> vmsd
->version_id
) {
1432 if (version_id
< vmsd
->minimum_version_id_old
) {
1435 if (version_id
< vmsd
->minimum_version_id
) {
1436 return vmsd
->load_state_old(f
, opaque
, version_id
);
1438 if (vmsd
->pre_load
) {
1439 int ret
= vmsd
->pre_load(opaque
);
1443 while(field
->name
) {
1444 if ((field
->field_exists
&&
1445 field
->field_exists(opaque
, version_id
)) ||
1446 (!field
->field_exists
&&
1447 field
->version_id
<= version_id
)) {
1448 void *base_addr
= opaque
+ field
->offset
;
1450 int size
= field
->size
;
1452 if (field
->flags
& VMS_VBUFFER
) {
1453 size
= *(int32_t *)(opaque
+field
->size_offset
);
1454 if (field
->flags
& VMS_MULTIPLY
) {
1455 size
*= field
->size
;
1458 if (field
->flags
& VMS_ARRAY
) {
1459 n_elems
= field
->num
;
1460 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1461 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1462 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1463 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1464 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1465 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1466 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1467 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1469 if (field
->flags
& VMS_POINTER
) {
1470 base_addr
= *(void **)base_addr
+ field
->start
;
1472 for (i
= 0; i
< n_elems
; i
++) {
1473 void *addr
= base_addr
+ size
* i
;
1475 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1476 addr
= *(void **)addr
;
1478 if (field
->flags
& VMS_STRUCT
) {
1479 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1481 ret
= field
->info
->get(f
, addr
, size
);
1491 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1495 if (vmsd
->post_load
) {
1496 return vmsd
->post_load(opaque
, version_id
);
1501 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1504 VMStateField
*field
= vmsd
->fields
;
1506 if (vmsd
->pre_save
) {
1507 vmsd
->pre_save(opaque
);
1509 while(field
->name
) {
1510 if (!field
->field_exists
||
1511 field
->field_exists(opaque
, vmsd
->version_id
)) {
1512 void *base_addr
= opaque
+ field
->offset
;
1514 int size
= field
->size
;
1516 if (field
->flags
& VMS_VBUFFER
) {
1517 size
= *(int32_t *)(opaque
+field
->size_offset
);
1518 if (field
->flags
& VMS_MULTIPLY
) {
1519 size
*= field
->size
;
1522 if (field
->flags
& VMS_ARRAY
) {
1523 n_elems
= field
->num
;
1524 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1525 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1526 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1527 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1528 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1529 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1530 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1531 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1533 if (field
->flags
& VMS_POINTER
) {
1534 base_addr
= *(void **)base_addr
+ field
->start
;
1536 for (i
= 0; i
< n_elems
; i
++) {
1537 void *addr
= base_addr
+ size
* i
;
1539 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1540 addr
= *(void **)addr
;
1542 if (field
->flags
& VMS_STRUCT
) {
1543 vmstate_save_state(f
, field
->vmsd
, addr
);
1545 field
->info
->put(f
, addr
, size
);
1551 vmstate_subsection_save(f
, vmsd
, opaque
);
1554 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1556 if (!se
->vmsd
) { /* Old style */
1557 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1559 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1562 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1564 if (!se
->vmsd
) { /* Old style */
1565 se
->ops
->save_state(f
, se
->opaque
);
1568 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1571 #define QEMU_VM_FILE_MAGIC 0x5145564d
1572 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1573 #define QEMU_VM_FILE_VERSION 0x00000003
1575 #define QEMU_VM_EOF 0x00
1576 #define QEMU_VM_SECTION_START 0x01
1577 #define QEMU_VM_SECTION_PART 0x02
1578 #define QEMU_VM_SECTION_END 0x03
1579 #define QEMU_VM_SECTION_FULL 0x04
1580 #define QEMU_VM_SUBSECTION 0x05
1582 bool qemu_savevm_state_blocked(Error
**errp
)
1586 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1587 if (se
->no_migrate
) {
1588 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1595 int qemu_savevm_state_begin(QEMUFile
*f
,
1596 const MigrationParams
*params
)
1601 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1602 if (!se
->ops
|| !se
->ops
->set_params
) {
1605 se
->ops
->set_params(params
, se
->opaque
);
1608 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1609 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1611 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1614 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1617 if (se
->ops
&& se
->ops
->is_active
) {
1618 if (!se
->ops
->is_active(se
->opaque
)) {
1623 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1624 qemu_put_be32(f
, se
->section_id
);
1627 len
= strlen(se
->idstr
);
1628 qemu_put_byte(f
, len
);
1629 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1631 qemu_put_be32(f
, se
->instance_id
);
1632 qemu_put_be32(f
, se
->version_id
);
1634 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1636 qemu_savevm_state_cancel(f
);
1640 ret
= qemu_file_get_error(f
);
1642 qemu_savevm_state_cancel(f
);
1650 * this function has three return values:
1651 * negative: there was one error, and we have -errno.
1652 * 0 : We haven't finished, caller have to go again
1653 * 1 : We have finished, we can go to complete phase
1655 int qemu_savevm_state_iterate(QEMUFile
*f
)
1660 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1661 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1664 if (se
->ops
&& se
->ops
->is_active
) {
1665 if (!se
->ops
->is_active(se
->opaque
)) {
1669 if (qemu_file_rate_limit(f
)) {
1672 trace_savevm_section_start();
1674 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1675 qemu_put_be32(f
, se
->section_id
);
1677 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1678 trace_savevm_section_end(se
->section_id
);
1681 /* Do not proceed to the next vmstate before this one reported
1682 completion of the current stage. This serializes the migration
1683 and reduces the probability that a faster changing state is
1684 synchronized over and over again. */
1691 ret
= qemu_file_get_error(f
);
1693 qemu_savevm_state_cancel(f
);
1698 int qemu_savevm_state_complete(QEMUFile
*f
)
1703 cpu_synchronize_all_states();
1705 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1706 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1709 if (se
->ops
&& se
->ops
->is_active
) {
1710 if (!se
->ops
->is_active(se
->opaque
)) {
1714 trace_savevm_section_start();
1716 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1717 qemu_put_be32(f
, se
->section_id
);
1719 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1720 trace_savevm_section_end(se
->section_id
);
1726 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1729 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1732 trace_savevm_section_start();
1734 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1735 qemu_put_be32(f
, se
->section_id
);
1738 len
= strlen(se
->idstr
);
1739 qemu_put_byte(f
, len
);
1740 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1742 qemu_put_be32(f
, se
->instance_id
);
1743 qemu_put_be32(f
, se
->version_id
);
1745 vmstate_save(f
, se
);
1746 trace_savevm_section_end(se
->section_id
);
1749 qemu_put_byte(f
, QEMU_VM_EOF
);
1751 return qemu_file_get_error(f
);
1754 void qemu_savevm_state_cancel(QEMUFile
*f
)
1758 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1759 if (se
->ops
&& se
->ops
->cancel
) {
1760 se
->ops
->cancel(se
->opaque
);
1765 static int qemu_savevm_state(QEMUFile
*f
)
1768 MigrationParams params
= {
1773 if (qemu_savevm_state_blocked(NULL
)) {
1778 ret
= qemu_savevm_state_begin(f
, ¶ms
);
1783 ret
= qemu_savevm_state_iterate(f
);
1788 ret
= qemu_savevm_state_complete(f
);
1792 ret
= qemu_file_get_error(f
);
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
;
2120 const char *name
= qdict_get_try_str(qdict
, "name");
2122 /* Verify if there is a device that doesn't support snapshots and is writable */
2124 while ((bs
= bdrv_next(bs
))) {
2126 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2130 if (!bdrv_can_snapshot(bs
)) {
2131 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2132 bdrv_get_device_name(bs
));
2137 bs
= bdrv_snapshots();
2139 monitor_printf(mon
, "No block device can accept snapshots\n");
2143 saved_vm_running
= runstate_is_running();
2144 vm_stop(RUN_STATE_SAVE_VM
);
2146 memset(sn
, 0, sizeof(*sn
));
2148 /* fill auxiliary fields */
2151 sn
->date_sec
= tb
.time
;
2152 sn
->date_nsec
= tb
.millitm
* 1000000;
2154 gettimeofday(&tv
, NULL
);
2155 sn
->date_sec
= tv
.tv_sec
;
2156 sn
->date_nsec
= tv
.tv_usec
* 1000;
2158 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2161 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2163 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2164 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2166 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2171 ptm
= localtime(&t
);
2172 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", ptm
);
2174 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2175 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2176 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2180 /* Delete old snapshots of the same name */
2181 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2185 /* save the VM state */
2186 f
= qemu_fopen_bdrv(bs
, 1);
2188 monitor_printf(mon
, "Could not open VM state file\n");
2191 ret
= qemu_savevm_state(f
);
2192 vm_state_size
= qemu_ftell(f
);
2195 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2199 /* create the snapshots */
2202 while ((bs1
= bdrv_next(bs1
))) {
2203 if (bdrv_can_snapshot(bs1
)) {
2204 /* Write VM state size only to the image that contains the state */
2205 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2206 ret
= bdrv_snapshot_create(bs1
, sn
);
2208 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2209 bdrv_get_device_name(bs1
));
2215 if (saved_vm_running
)
2219 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2222 int saved_vm_running
;
2225 saved_vm_running
= runstate_is_running();
2226 vm_stop(RUN_STATE_SAVE_VM
);
2228 f
= qemu_fopen(filename
, "wb");
2230 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2233 ret
= qemu_save_device_state(f
);
2236 error_set(errp
, QERR_IO_ERROR
);
2240 if (saved_vm_running
)
2244 int load_vmstate(const char *name
)
2246 BlockDriverState
*bs
, *bs_vm_state
;
2247 QEMUSnapshotInfo sn
;
2251 bs_vm_state
= bdrv_snapshots();
2253 error_report("No block device supports snapshots");
2257 /* Don't even try to load empty VM states */
2258 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2261 } else if (sn
.vm_state_size
== 0) {
2262 error_report("This is a disk-only snapshot. Revert to it offline "
2267 /* Verify if there is any device that doesn't support snapshots and is
2268 writable and check if the requested snapshot is available too. */
2270 while ((bs
= bdrv_next(bs
))) {
2272 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2276 if (!bdrv_can_snapshot(bs
)) {
2277 error_report("Device '%s' is writable but does not support snapshots.",
2278 bdrv_get_device_name(bs
));
2282 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2284 error_report("Device '%s' does not have the requested snapshot '%s'",
2285 bdrv_get_device_name(bs
), name
);
2290 /* Flush all IO requests so they don't interfere with the new state. */
2294 while ((bs
= bdrv_next(bs
))) {
2295 if (bdrv_can_snapshot(bs
)) {
2296 ret
= bdrv_snapshot_goto(bs
, name
);
2298 error_report("Error %d while activating snapshot '%s' on '%s'",
2299 ret
, name
, bdrv_get_device_name(bs
));
2305 /* restore the VM state */
2306 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2308 error_report("Could not open VM state file");
2312 qemu_system_reset(VMRESET_SILENT
);
2313 ret
= qemu_loadvm_state(f
);
2317 error_report("Error %d while loading VM state", ret
);
2324 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2326 BlockDriverState
*bs
, *bs1
;
2328 const char *name
= qdict_get_str(qdict
, "name");
2330 bs
= bdrv_snapshots();
2332 monitor_printf(mon
, "No block device supports snapshots\n");
2337 while ((bs1
= bdrv_next(bs1
))) {
2338 if (bdrv_can_snapshot(bs1
)) {
2339 ret
= bdrv_snapshot_delete(bs1
, name
);
2341 if (ret
== -ENOTSUP
)
2343 "Snapshots not supported on device '%s'\n",
2344 bdrv_get_device_name(bs1
));
2346 monitor_printf(mon
, "Error %d while deleting snapshot on "
2347 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2353 void do_info_snapshots(Monitor
*mon
)
2355 BlockDriverState
*bs
, *bs1
;
2356 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2357 int nb_sns
, i
, ret
, available
;
2359 int *available_snapshots
;
2362 bs
= bdrv_snapshots();
2364 monitor_printf(mon
, "No available block device supports snapshots\n");
2368 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2370 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2375 monitor_printf(mon
, "There is no snapshot available.\n");
2379 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2381 for (i
= 0; i
< nb_sns
; i
++) {
2386 while ((bs1
= bdrv_next(bs1
))) {
2387 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2388 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2397 available_snapshots
[total
] = i
;
2403 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2404 for (i
= 0; i
< total
; i
++) {
2405 sn
= &sn_tab
[available_snapshots
[i
]];
2406 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2409 monitor_printf(mon
, "There is no suitable snapshot available\n");
2413 g_free(available_snapshots
);
2417 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2419 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2420 memory_region_name(mr
), dev
);
2423 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2425 /* Nothing do to while the implementation is in RAMBlock */
2428 void vmstate_register_ram_global(MemoryRegion
*mr
)
2430 vmstate_register_ram(mr
, NULL
);
2439 nzrun = length byte...
2441 length = uleb128 encoded integer
2443 int xbzrle_encode_buffer(uint8_t *old_buf
, uint8_t *new_buf
, int slen
,
2444 uint8_t *dst
, int dlen
)
2446 uint32_t zrun_len
= 0, nzrun_len
= 0;
2449 uint8_t *nzrun_start
= NULL
;
2451 g_assert(!(((uintptr_t)old_buf
| (uintptr_t)new_buf
| slen
) %
2460 /* not aligned to sizeof(long) */
2461 res
= (slen
- i
) % sizeof(long);
2462 while (res
&& old_buf
[i
] == new_buf
[i
]) {
2468 /* word at a time for speed */
2471 (*(long *)(old_buf
+ i
)) == (*(long *)(new_buf
+ i
))) {
2473 zrun_len
+= sizeof(long);
2476 /* go over the rest */
2477 while (i
< slen
&& old_buf
[i
] == new_buf
[i
]) {
2483 /* buffer unchanged */
2484 if (zrun_len
== slen
) {
2488 /* skip last zero run */
2493 d
+= uleb128_encode_small(dst
+ d
, zrun_len
);
2496 nzrun_start
= new_buf
+ i
;
2502 /* not aligned to sizeof(long) */
2503 res
= (slen
- i
) % sizeof(long);
2504 while (res
&& old_buf
[i
] != new_buf
[i
]) {
2510 /* word at a time for speed, use of 32-bit long okay */
2512 /* truncation to 32-bit long okay */
2513 long mask
= (long)0x0101010101010101ULL
;
2515 xor = *(long *)(old_buf
+ i
) ^ *(long *)(new_buf
+ i
);
2516 if ((xor - mask
) & ~xor & (mask
<< 7)) {
2517 /* found the end of an nzrun within the current long */
2518 while (old_buf
[i
] != new_buf
[i
]) {
2525 nzrun_len
+= sizeof(long);
2530 d
+= uleb128_encode_small(dst
+ d
, nzrun_len
);
2532 if (d
+ nzrun_len
> dlen
) {
2535 memcpy(dst
+ d
, nzrun_start
, nzrun_len
);
2543 int xbzrle_decode_buffer(uint8_t *src
, int slen
, uint8_t *dst
, int dlen
)
2552 if ((slen
- i
) < 2) {
2556 ret
= uleb128_decode_small(src
+ i
, &count
);
2557 if (ret
< 0 || (i
&& !count
)) {
2569 if ((slen
- i
) < 2) {
2573 ret
= uleb128_decode_small(src
+ i
, &count
);
2574 if (ret
< 0 || !count
) {
2580 if (d
+ count
> dlen
|| i
+ count
> slen
) {
2584 memcpy(dst
+ d
, src
+ i
, count
);