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 static const QEMUFileOps stdio_file_read_ops
= {
315 .get_fd
= stdio_get_fd
,
316 .get_buffer
= stdio_get_buffer
,
317 .close
= stdio_fclose
320 static const QEMUFileOps stdio_file_write_ops
= {
321 .get_fd
= stdio_get_fd
,
322 .put_buffer
= stdio_put_buffer
,
323 .close
= stdio_fclose
326 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
331 (mode
[0] != 'r' && mode
[0] != 'w') ||
332 mode
[1] != 'b' || mode
[2] != 0) {
333 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
337 s
= g_malloc0(sizeof(QEMUFileStdio
));
338 s
->stdio_file
= fdopen(fd
, mode
);
343 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
345 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
354 static const QEMUFileOps socket_read_ops
= {
355 .get_fd
= socket_get_fd
,
356 .get_buffer
= socket_get_buffer
,
357 .close
= socket_close
360 QEMUFile
*qemu_fopen_socket(int fd
)
362 QEMUFileSocket
*s
= g_malloc0(sizeof(QEMUFileSocket
));
365 s
->file
= qemu_fopen_ops(s
, &socket_read_ops
);
369 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
374 (mode
[0] != 'r' && mode
[0] != 'w') ||
375 mode
[1] != 'b' || mode
[2] != 0) {
376 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
380 s
= g_malloc0(sizeof(QEMUFileStdio
));
382 s
->stdio_file
= fopen(filename
, mode
);
387 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
389 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
397 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
398 int64_t pos
, int size
)
400 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
404 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
406 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
409 static int bdrv_fclose(void *opaque
)
411 return bdrv_flush(opaque
);
414 static const QEMUFileOps bdrv_read_ops
= {
415 .get_buffer
= block_get_buffer
,
419 static const QEMUFileOps bdrv_write_ops
= {
420 .put_buffer
= block_put_buffer
,
424 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
427 return qemu_fopen_ops(bs
, &bdrv_write_ops
);
428 return qemu_fopen_ops(bs
, &bdrv_read_ops
);
431 QEMUFile
*qemu_fopen_ops(void *opaque
, const QEMUFileOps
*ops
)
435 f
= g_malloc0(sizeof(QEMUFile
));
444 int qemu_file_get_error(QEMUFile
*f
)
446 return f
->last_error
;
449 static void qemu_file_set_error(QEMUFile
*f
, int ret
)
454 /** Flushes QEMUFile buffer
457 static int qemu_fflush(QEMUFile
*f
)
461 if (!f
->ops
->put_buffer
)
464 if (f
->is_write
&& f
->buf_index
> 0) {
465 ret
= f
->ops
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
467 f
->buf_offset
+= f
->buf_index
;
474 static void qemu_fill_buffer(QEMUFile
*f
)
479 if (!f
->ops
->get_buffer
)
485 pending
= f
->buf_size
- f
->buf_index
;
487 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
490 f
->buf_size
= pending
;
492 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
493 IO_BUF_SIZE
- pending
);
496 f
->buf_offset
+= len
;
497 } else if (len
== 0) {
498 qemu_file_set_error(f
, -EIO
);
499 } else if (len
!= -EAGAIN
)
500 qemu_file_set_error(f
, len
);
503 int qemu_get_fd(QEMUFile
*f
)
505 if (f
->ops
->get_fd
) {
506 return f
->ops
->get_fd(f
->opaque
);
513 * Returns negative error value if any error happened on previous operations or
514 * while closing the file. Returns 0 or positive number on success.
516 * The meaning of return value on success depends on the specific backend
519 int qemu_fclose(QEMUFile
*f
)
522 ret
= qemu_fflush(f
);
525 int ret2
= f
->ops
->close(f
->opaque
);
530 /* If any error was spotted before closing, we should report it
531 * instead of the close() return value.
540 int qemu_file_put_notify(QEMUFile
*f
)
542 return f
->ops
->put_buffer(f
->opaque
, NULL
, 0, 0);
545 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
553 if (f
->is_write
== 0 && f
->buf_index
> 0) {
555 "Attempted to write to buffer while read buffer is not empty\n");
560 l
= IO_BUF_SIZE
- f
->buf_index
;
563 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
568 if (f
->buf_index
>= IO_BUF_SIZE
) {
569 int ret
= qemu_fflush(f
);
571 qemu_file_set_error(f
, ret
);
578 void qemu_put_byte(QEMUFile
*f
, int v
)
584 if (f
->is_write
== 0 && f
->buf_index
> 0) {
586 "Attempted to write to buffer while read buffer is not empty\n");
590 f
->buf
[f
->buf_index
++] = v
;
592 if (f
->buf_index
>= IO_BUF_SIZE
) {
593 int ret
= qemu_fflush(f
);
595 qemu_file_set_error(f
, ret
);
600 static void qemu_file_skip(QEMUFile
*f
, int size
)
602 if (f
->buf_index
+ size
<= f
->buf_size
) {
603 f
->buf_index
+= size
;
607 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
616 index
= f
->buf_index
+ offset
;
617 pending
= f
->buf_size
- index
;
618 if (pending
< size
) {
620 index
= f
->buf_index
+ offset
;
621 pending
= f
->buf_size
- index
;
627 if (size
> pending
) {
631 memcpy(buf
, f
->buf
+ index
, size
);
635 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
640 while (pending
> 0) {
643 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
647 qemu_file_skip(f
, res
);
655 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
657 int index
= f
->buf_index
+ offset
;
663 if (index
>= f
->buf_size
) {
665 index
= f
->buf_index
+ offset
;
666 if (index
>= f
->buf_size
) {
670 return f
->buf
[index
];
673 int qemu_get_byte(QEMUFile
*f
)
677 result
= qemu_peek_byte(f
, 0);
678 qemu_file_skip(f
, 1);
682 static int64_t qemu_ftell(QEMUFile
*f
)
684 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
687 int qemu_file_rate_limit(QEMUFile
*f
)
689 if (f
->ops
->rate_limit
)
690 return f
->ops
->rate_limit(f
->opaque
);
695 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
697 if (f
->ops
->get_rate_limit
)
698 return f
->ops
->get_rate_limit(f
->opaque
);
703 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
705 /* any failed or completed migration keeps its state to allow probing of
706 * migration data, but has no associated file anymore */
707 if (f
&& f
->ops
->set_rate_limit
)
708 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
713 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
715 qemu_put_byte(f
, v
>> 8);
719 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
721 qemu_put_byte(f
, v
>> 24);
722 qemu_put_byte(f
, v
>> 16);
723 qemu_put_byte(f
, v
>> 8);
727 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
729 qemu_put_be32(f
, v
>> 32);
733 unsigned int qemu_get_be16(QEMUFile
*f
)
736 v
= qemu_get_byte(f
) << 8;
737 v
|= qemu_get_byte(f
);
741 unsigned int qemu_get_be32(QEMUFile
*f
)
744 v
= qemu_get_byte(f
) << 24;
745 v
|= qemu_get_byte(f
) << 16;
746 v
|= qemu_get_byte(f
) << 8;
747 v
|= qemu_get_byte(f
);
751 uint64_t qemu_get_be64(QEMUFile
*f
)
754 v
= (uint64_t)qemu_get_be32(f
) << 32;
755 v
|= qemu_get_be32(f
);
762 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
764 uint64_t expire_time
;
766 expire_time
= qemu_timer_expire_time_ns(ts
);
767 qemu_put_be64(f
, expire_time
);
770 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
772 uint64_t expire_time
;
774 expire_time
= qemu_get_be64(f
);
775 if (expire_time
!= -1) {
776 qemu_mod_timer_ns(ts
, expire_time
);
785 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
788 *v
= qemu_get_byte(f
);
792 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
795 qemu_put_byte(f
, *v
);
798 const VMStateInfo vmstate_info_bool
= {
806 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
813 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
819 const VMStateInfo vmstate_info_int8
= {
827 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
830 qemu_get_sbe16s(f
, v
);
834 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
837 qemu_put_sbe16s(f
, v
);
840 const VMStateInfo vmstate_info_int16
= {
848 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
851 qemu_get_sbe32s(f
, v
);
855 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
858 qemu_put_sbe32s(f
, v
);
861 const VMStateInfo vmstate_info_int32
= {
867 /* 32 bit int. See that the received value is the same than the one
870 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
874 qemu_get_sbe32s(f
, &v2
);
881 const VMStateInfo vmstate_info_int32_equal
= {
882 .name
= "int32 equal",
883 .get
= get_int32_equal
,
887 /* 32 bit int. See that the received value is the less or the same
888 than the one in the field */
890 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
894 qemu_get_sbe32s(f
, &new);
901 const VMStateInfo vmstate_info_int32_le
= {
902 .name
= "int32 equal",
909 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
912 qemu_get_sbe64s(f
, v
);
916 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
919 qemu_put_sbe64s(f
, v
);
922 const VMStateInfo vmstate_info_int64
= {
928 /* 8 bit unsigned int */
930 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
937 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
943 const VMStateInfo vmstate_info_uint8
= {
949 /* 16 bit unsigned int */
951 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
954 qemu_get_be16s(f
, v
);
958 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
961 qemu_put_be16s(f
, v
);
964 const VMStateInfo vmstate_info_uint16
= {
970 /* 32 bit unsigned int */
972 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
975 qemu_get_be32s(f
, v
);
979 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
982 qemu_put_be32s(f
, v
);
985 const VMStateInfo vmstate_info_uint32
= {
991 /* 32 bit uint. See that the received value is the same than the one
994 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
998 qemu_get_be32s(f
, &v2
);
1006 const VMStateInfo vmstate_info_uint32_equal
= {
1007 .name
= "uint32 equal",
1008 .get
= get_uint32_equal
,
1012 /* 64 bit unsigned int */
1014 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1017 qemu_get_be64s(f
, v
);
1021 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1024 qemu_put_be64s(f
, v
);
1027 const VMStateInfo vmstate_info_uint64
= {
1033 /* 8 bit int. See that the received value is the same than the one
1036 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1040 qemu_get_8s(f
, &v2
);
1047 const VMStateInfo vmstate_info_uint8_equal
= {
1048 .name
= "uint8 equal",
1049 .get
= get_uint8_equal
,
1053 /* 16 bit unsigned int int. See that the received value is the same than the one
1056 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1060 qemu_get_be16s(f
, &v2
);
1067 const VMStateInfo vmstate_info_uint16_equal
= {
1068 .name
= "uint16 equal",
1069 .get
= get_uint16_equal
,
1075 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1078 qemu_get_timer(f
, v
);
1082 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1085 qemu_put_timer(f
, v
);
1088 const VMStateInfo vmstate_info_timer
= {
1094 /* uint8_t buffers */
1096 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1099 qemu_get_buffer(f
, v
, size
);
1103 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1106 qemu_put_buffer(f
, v
, size
);
1109 const VMStateInfo vmstate_info_buffer
= {
1115 /* unused buffers: space that was used for some fields that are
1116 not useful anymore */
1118 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1124 block_len
= MIN(sizeof(buf
), size
);
1126 qemu_get_buffer(f
, buf
, block_len
);
1131 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1133 static const uint8_t buf
[1024];
1137 block_len
= MIN(sizeof(buf
), size
);
1139 qemu_put_buffer(f
, buf
, block_len
);
1143 const VMStateInfo vmstate_info_unused_buffer
= {
1144 .name
= "unused_buffer",
1145 .get
= get_unused_buffer
,
1146 .put
= put_unused_buffer
,
1149 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1150 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1151 * bit words with the bits in big endian order. The in-memory format
1152 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1154 /* This is the number of 64 bit words sent over the wire */
1155 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1156 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1158 unsigned long *bmp
= pv
;
1160 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1161 uint64_t w
= qemu_get_be64(f
);
1163 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1164 bmp
[idx
++] = w
>> 32;
1170 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1172 unsigned long *bmp
= pv
;
1174 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1175 uint64_t w
= bmp
[idx
++];
1176 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1177 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1179 qemu_put_be64(f
, w
);
1183 const VMStateInfo vmstate_info_bitmap
= {
1189 typedef struct CompatEntry
{
1194 typedef struct SaveStateEntry
{
1195 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1201 SaveVMHandlers
*ops
;
1202 const VMStateDescription
*vmsd
;
1204 CompatEntry
*compat
;
1210 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1211 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1212 static int global_section_id
;
1214 static int calculate_new_instance_id(const char *idstr
)
1217 int instance_id
= 0;
1219 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1220 if (strcmp(idstr
, se
->idstr
) == 0
1221 && instance_id
<= se
->instance_id
) {
1222 instance_id
= se
->instance_id
+ 1;
1228 static int calculate_compat_instance_id(const char *idstr
)
1231 int instance_id
= 0;
1233 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1237 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1238 && instance_id
<= se
->compat
->instance_id
) {
1239 instance_id
= se
->compat
->instance_id
+ 1;
1245 /* TODO: Individual devices generally have very little idea about the rest
1246 of the system, so instance_id should be removed/replaced.
1247 Meanwhile pass -1 as instance_id if you do not already have a clearly
1248 distinguishing id for all instances of your device class. */
1249 int register_savevm_live(DeviceState
*dev
,
1253 SaveVMHandlers
*ops
,
1258 se
= g_malloc0(sizeof(SaveStateEntry
));
1259 se
->version_id
= version_id
;
1260 se
->section_id
= global_section_id
++;
1262 se
->opaque
= opaque
;
1265 /* if this is a live_savem then set is_ram */
1266 if (ops
->save_live_setup
!= NULL
) {
1271 char *id
= qdev_get_dev_path(dev
);
1273 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1274 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1277 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1278 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1279 se
->compat
->instance_id
= instance_id
== -1 ?
1280 calculate_compat_instance_id(idstr
) : instance_id
;
1284 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1286 if (instance_id
== -1) {
1287 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1289 se
->instance_id
= instance_id
;
1291 assert(!se
->compat
|| se
->instance_id
== 0);
1292 /* add at the end of list */
1293 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1297 int register_savevm(DeviceState
*dev
,
1301 SaveStateHandler
*save_state
,
1302 LoadStateHandler
*load_state
,
1305 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1306 ops
->save_state
= save_state
;
1307 ops
->load_state
= load_state
;
1308 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1312 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1314 SaveStateEntry
*se
, *new_se
;
1318 char *path
= qdev_get_dev_path(dev
);
1320 pstrcpy(id
, sizeof(id
), path
);
1321 pstrcat(id
, sizeof(id
), "/");
1325 pstrcat(id
, sizeof(id
), idstr
);
1327 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1328 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1329 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1339 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1340 const VMStateDescription
*vmsd
,
1341 void *opaque
, int alias_id
,
1342 int required_for_version
)
1346 /* If this triggers, alias support can be dropped for the vmsd. */
1347 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1349 se
= g_malloc0(sizeof(SaveStateEntry
));
1350 se
->version_id
= vmsd
->version_id
;
1351 se
->section_id
= global_section_id
++;
1352 se
->opaque
= opaque
;
1354 se
->alias_id
= alias_id
;
1355 se
->no_migrate
= vmsd
->unmigratable
;
1358 char *id
= qdev_get_dev_path(dev
);
1360 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1361 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1364 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1365 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1366 se
->compat
->instance_id
= instance_id
== -1 ?
1367 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1371 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1373 if (instance_id
== -1) {
1374 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1376 se
->instance_id
= instance_id
;
1378 assert(!se
->compat
|| se
->instance_id
== 0);
1379 /* add at the end of list */
1380 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1384 int vmstate_register(DeviceState
*dev
, int instance_id
,
1385 const VMStateDescription
*vmsd
, void *opaque
)
1387 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1391 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1394 SaveStateEntry
*se
, *new_se
;
1396 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1397 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1398 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1407 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1409 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1412 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1413 void *opaque
, int version_id
)
1415 VMStateField
*field
= vmsd
->fields
;
1418 if (version_id
> vmsd
->version_id
) {
1421 if (version_id
< vmsd
->minimum_version_id_old
) {
1424 if (version_id
< vmsd
->minimum_version_id
) {
1425 return vmsd
->load_state_old(f
, opaque
, version_id
);
1427 if (vmsd
->pre_load
) {
1428 int ret
= vmsd
->pre_load(opaque
);
1432 while(field
->name
) {
1433 if ((field
->field_exists
&&
1434 field
->field_exists(opaque
, version_id
)) ||
1435 (!field
->field_exists
&&
1436 field
->version_id
<= version_id
)) {
1437 void *base_addr
= opaque
+ field
->offset
;
1439 int size
= field
->size
;
1441 if (field
->flags
& VMS_VBUFFER
) {
1442 size
= *(int32_t *)(opaque
+field
->size_offset
);
1443 if (field
->flags
& VMS_MULTIPLY
) {
1444 size
*= field
->size
;
1447 if (field
->flags
& VMS_ARRAY
) {
1448 n_elems
= field
->num
;
1449 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1450 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1451 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1452 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1453 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1454 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1455 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1456 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1458 if (field
->flags
& VMS_POINTER
) {
1459 base_addr
= *(void **)base_addr
+ field
->start
;
1461 for (i
= 0; i
< n_elems
; i
++) {
1462 void *addr
= base_addr
+ size
* i
;
1464 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1465 addr
= *(void **)addr
;
1467 if (field
->flags
& VMS_STRUCT
) {
1468 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1470 ret
= field
->info
->get(f
, addr
, size
);
1480 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1484 if (vmsd
->post_load
) {
1485 return vmsd
->post_load(opaque
, version_id
);
1490 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1493 VMStateField
*field
= vmsd
->fields
;
1495 if (vmsd
->pre_save
) {
1496 vmsd
->pre_save(opaque
);
1498 while(field
->name
) {
1499 if (!field
->field_exists
||
1500 field
->field_exists(opaque
, vmsd
->version_id
)) {
1501 void *base_addr
= opaque
+ field
->offset
;
1503 int size
= field
->size
;
1505 if (field
->flags
& VMS_VBUFFER
) {
1506 size
= *(int32_t *)(opaque
+field
->size_offset
);
1507 if (field
->flags
& VMS_MULTIPLY
) {
1508 size
*= field
->size
;
1511 if (field
->flags
& VMS_ARRAY
) {
1512 n_elems
= field
->num
;
1513 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1514 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1515 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1516 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1517 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1518 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1519 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1520 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1522 if (field
->flags
& VMS_POINTER
) {
1523 base_addr
= *(void **)base_addr
+ field
->start
;
1525 for (i
= 0; i
< n_elems
; i
++) {
1526 void *addr
= base_addr
+ size
* i
;
1528 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1529 addr
= *(void **)addr
;
1531 if (field
->flags
& VMS_STRUCT
) {
1532 vmstate_save_state(f
, field
->vmsd
, addr
);
1534 field
->info
->put(f
, addr
, size
);
1540 vmstate_subsection_save(f
, vmsd
, opaque
);
1543 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1545 if (!se
->vmsd
) { /* Old style */
1546 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1548 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1551 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1553 if (!se
->vmsd
) { /* Old style */
1554 se
->ops
->save_state(f
, se
->opaque
);
1557 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1560 #define QEMU_VM_FILE_MAGIC 0x5145564d
1561 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1562 #define QEMU_VM_FILE_VERSION 0x00000003
1564 #define QEMU_VM_EOF 0x00
1565 #define QEMU_VM_SECTION_START 0x01
1566 #define QEMU_VM_SECTION_PART 0x02
1567 #define QEMU_VM_SECTION_END 0x03
1568 #define QEMU_VM_SECTION_FULL 0x04
1569 #define QEMU_VM_SUBSECTION 0x05
1571 bool qemu_savevm_state_blocked(Error
**errp
)
1575 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1576 if (se
->no_migrate
) {
1577 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1584 int qemu_savevm_state_begin(QEMUFile
*f
,
1585 const MigrationParams
*params
)
1590 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1591 if (!se
->ops
|| !se
->ops
->set_params
) {
1594 se
->ops
->set_params(params
, se
->opaque
);
1597 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1598 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1600 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1603 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1606 if (se
->ops
&& se
->ops
->is_active
) {
1607 if (!se
->ops
->is_active(se
->opaque
)) {
1612 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1613 qemu_put_be32(f
, se
->section_id
);
1616 len
= strlen(se
->idstr
);
1617 qemu_put_byte(f
, len
);
1618 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1620 qemu_put_be32(f
, se
->instance_id
);
1621 qemu_put_be32(f
, se
->version_id
);
1623 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1625 qemu_savevm_state_cancel(f
);
1629 ret
= qemu_file_get_error(f
);
1631 qemu_savevm_state_cancel(f
);
1639 * this function has three return values:
1640 * negative: there was one error, and we have -errno.
1641 * 0 : We haven't finished, caller have to go again
1642 * 1 : We have finished, we can go to complete phase
1644 int qemu_savevm_state_iterate(QEMUFile
*f
)
1649 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1650 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1653 if (se
->ops
&& se
->ops
->is_active
) {
1654 if (!se
->ops
->is_active(se
->opaque
)) {
1658 if (qemu_file_rate_limit(f
)) {
1661 trace_savevm_section_start();
1663 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1664 qemu_put_be32(f
, se
->section_id
);
1666 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1667 trace_savevm_section_end(se
->section_id
);
1670 /* Do not proceed to the next vmstate before this one reported
1671 completion of the current stage. This serializes the migration
1672 and reduces the probability that a faster changing state is
1673 synchronized over and over again. */
1680 ret
= qemu_file_get_error(f
);
1682 qemu_savevm_state_cancel(f
);
1687 int qemu_savevm_state_complete(QEMUFile
*f
)
1692 cpu_synchronize_all_states();
1694 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1695 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1698 if (se
->ops
&& se
->ops
->is_active
) {
1699 if (!se
->ops
->is_active(se
->opaque
)) {
1703 trace_savevm_section_start();
1705 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1706 qemu_put_be32(f
, se
->section_id
);
1708 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1709 trace_savevm_section_end(se
->section_id
);
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
);
1740 return qemu_file_get_error(f
);
1743 void qemu_savevm_state_cancel(QEMUFile
*f
)
1747 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1748 if (se
->ops
&& se
->ops
->cancel
) {
1749 se
->ops
->cancel(se
->opaque
);
1754 static int qemu_savevm_state(QEMUFile
*f
)
1757 MigrationParams params
= {
1762 if (qemu_savevm_state_blocked(NULL
)) {
1767 ret
= qemu_savevm_state_begin(f
, ¶ms
);
1772 ret
= qemu_savevm_state_iterate(f
);
1777 ret
= qemu_savevm_state_complete(f
);
1781 ret
= qemu_file_get_error(f
);
1787 static int qemu_save_device_state(QEMUFile
*f
)
1791 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1792 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1794 cpu_synchronize_all_states();
1796 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1802 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1807 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1808 qemu_put_be32(f
, se
->section_id
);
1811 len
= strlen(se
->idstr
);
1812 qemu_put_byte(f
, len
);
1813 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1815 qemu_put_be32(f
, se
->instance_id
);
1816 qemu_put_be32(f
, se
->version_id
);
1818 vmstate_save(f
, se
);
1821 qemu_put_byte(f
, QEMU_VM_EOF
);
1823 return qemu_file_get_error(f
);
1826 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1830 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1831 if (!strcmp(se
->idstr
, idstr
) &&
1832 (instance_id
== se
->instance_id
||
1833 instance_id
== se
->alias_id
))
1835 /* Migrating from an older version? */
1836 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1837 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1838 (instance_id
== se
->compat
->instance_id
||
1839 instance_id
== se
->alias_id
))
1846 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1848 while(sub
&& sub
->needed
) {
1849 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1857 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1860 while (qemu_peek_byte(f
, 0) == QEMU_VM_SUBSECTION
) {
1863 uint8_t version_id
, len
, size
;
1864 const VMStateDescription
*sub_vmsd
;
1866 len
= qemu_peek_byte(f
, 1);
1867 if (len
< strlen(vmsd
->name
) + 1) {
1868 /* subsection name has be be "section_name/a" */
1871 size
= qemu_peek_buffer(f
, (uint8_t *)idstr
, len
, 2);
1877 if (strncmp(vmsd
->name
, idstr
, strlen(vmsd
->name
)) != 0) {
1878 /* it don't have a valid subsection name */
1881 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1882 if (sub_vmsd
== NULL
) {
1885 qemu_file_skip(f
, 1); /* subsection */
1886 qemu_file_skip(f
, 1); /* len */
1887 qemu_file_skip(f
, len
); /* idstr */
1888 version_id
= qemu_get_be32(f
);
1890 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1898 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1901 const VMStateSubsection
*sub
= vmsd
->subsections
;
1903 while (sub
&& sub
->needed
) {
1904 if (sub
->needed(opaque
)) {
1905 const VMStateDescription
*vmsd
= sub
->vmsd
;
1908 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1909 len
= strlen(vmsd
->name
);
1910 qemu_put_byte(f
, len
);
1911 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1912 qemu_put_be32(f
, vmsd
->version_id
);
1913 vmstate_save_state(f
, vmsd
, opaque
);
1919 typedef struct LoadStateEntry
{
1920 QLIST_ENTRY(LoadStateEntry
) entry
;
1926 int qemu_loadvm_state(QEMUFile
*f
)
1928 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1929 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1930 LoadStateEntry
*le
, *new_le
;
1931 uint8_t section_type
;
1935 if (qemu_savevm_state_blocked(NULL
)) {
1939 v
= qemu_get_be32(f
);
1940 if (v
!= QEMU_VM_FILE_MAGIC
)
1943 v
= qemu_get_be32(f
);
1944 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1945 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1948 if (v
!= QEMU_VM_FILE_VERSION
)
1951 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1952 uint32_t instance_id
, version_id
, section_id
;
1957 switch (section_type
) {
1958 case QEMU_VM_SECTION_START
:
1959 case QEMU_VM_SECTION_FULL
:
1960 /* Read section start */
1961 section_id
= qemu_get_be32(f
);
1962 len
= qemu_get_byte(f
);
1963 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1965 instance_id
= qemu_get_be32(f
);
1966 version_id
= qemu_get_be32(f
);
1968 /* Find savevm section */
1969 se
= find_se(idstr
, instance_id
);
1971 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1976 /* Validate version */
1977 if (version_id
> se
->version_id
) {
1978 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1979 version_id
, idstr
, se
->version_id
);
1985 le
= g_malloc0(sizeof(*le
));
1988 le
->section_id
= section_id
;
1989 le
->version_id
= version_id
;
1990 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
1992 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
1994 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1995 instance_id
, idstr
);
1999 case QEMU_VM_SECTION_PART
:
2000 case QEMU_VM_SECTION_END
:
2001 section_id
= qemu_get_be32(f
);
2003 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
2004 if (le
->section_id
== section_id
) {
2009 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
2014 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2016 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
2022 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
2028 cpu_synchronize_all_post_init();
2033 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
2034 QLIST_REMOVE(le
, entry
);
2039 ret
= qemu_file_get_error(f
);
2045 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
2048 QEMUSnapshotInfo
*sn_tab
, *sn
;
2052 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2055 for(i
= 0; i
< nb_sns
; i
++) {
2057 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
2068 * Deletes snapshots of a given name in all opened images.
2070 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
2072 BlockDriverState
*bs
;
2073 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
2077 while ((bs
= bdrv_next(bs
))) {
2078 if (bdrv_can_snapshot(bs
) &&
2079 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
2081 ret
= bdrv_snapshot_delete(bs
, name
);
2084 "Error while deleting snapshot on '%s'\n",
2085 bdrv_get_device_name(bs
));
2094 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
2096 BlockDriverState
*bs
, *bs1
;
2097 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
2100 int saved_vm_running
;
2101 uint64_t vm_state_size
;
2109 const char *name
= qdict_get_try_str(qdict
, "name");
2111 /* Verify if there is a device that doesn't support snapshots and is writable */
2113 while ((bs
= bdrv_next(bs
))) {
2115 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2119 if (!bdrv_can_snapshot(bs
)) {
2120 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2121 bdrv_get_device_name(bs
));
2126 bs
= bdrv_snapshots();
2128 monitor_printf(mon
, "No block device can accept snapshots\n");
2132 saved_vm_running
= runstate_is_running();
2133 vm_stop(RUN_STATE_SAVE_VM
);
2135 memset(sn
, 0, sizeof(*sn
));
2137 /* fill auxiliary fields */
2140 sn
->date_sec
= tb
.time
;
2141 sn
->date_nsec
= tb
.millitm
* 1000000;
2143 gettimeofday(&tv
, NULL
);
2144 sn
->date_sec
= tv
.tv_sec
;
2145 sn
->date_nsec
= tv
.tv_usec
* 1000;
2147 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2150 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2152 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2153 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2155 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2160 ptm
= localtime(&t
);
2161 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", ptm
);
2163 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2164 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2165 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2169 /* Delete old snapshots of the same name */
2170 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2174 /* save the VM state */
2175 f
= qemu_fopen_bdrv(bs
, 1);
2177 monitor_printf(mon
, "Could not open VM state file\n");
2180 ret
= qemu_savevm_state(f
);
2181 vm_state_size
= qemu_ftell(f
);
2184 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2188 /* create the snapshots */
2191 while ((bs1
= bdrv_next(bs1
))) {
2192 if (bdrv_can_snapshot(bs1
)) {
2193 /* Write VM state size only to the image that contains the state */
2194 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2195 ret
= bdrv_snapshot_create(bs1
, sn
);
2197 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2198 bdrv_get_device_name(bs1
));
2204 if (saved_vm_running
)
2208 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2211 int saved_vm_running
;
2214 saved_vm_running
= runstate_is_running();
2215 vm_stop(RUN_STATE_SAVE_VM
);
2217 f
= qemu_fopen(filename
, "wb");
2219 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2222 ret
= qemu_save_device_state(f
);
2225 error_set(errp
, QERR_IO_ERROR
);
2229 if (saved_vm_running
)
2233 int load_vmstate(const char *name
)
2235 BlockDriverState
*bs
, *bs_vm_state
;
2236 QEMUSnapshotInfo sn
;
2240 bs_vm_state
= bdrv_snapshots();
2242 error_report("No block device supports snapshots");
2246 /* Don't even try to load empty VM states */
2247 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2250 } else if (sn
.vm_state_size
== 0) {
2251 error_report("This is a disk-only snapshot. Revert to it offline "
2256 /* Verify if there is any device that doesn't support snapshots and is
2257 writable and check if the requested snapshot is available too. */
2259 while ((bs
= bdrv_next(bs
))) {
2261 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2265 if (!bdrv_can_snapshot(bs
)) {
2266 error_report("Device '%s' is writable but does not support snapshots.",
2267 bdrv_get_device_name(bs
));
2271 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2273 error_report("Device '%s' does not have the requested snapshot '%s'",
2274 bdrv_get_device_name(bs
), name
);
2279 /* Flush all IO requests so they don't interfere with the new state. */
2283 while ((bs
= bdrv_next(bs
))) {
2284 if (bdrv_can_snapshot(bs
)) {
2285 ret
= bdrv_snapshot_goto(bs
, name
);
2287 error_report("Error %d while activating snapshot '%s' on '%s'",
2288 ret
, name
, bdrv_get_device_name(bs
));
2294 /* restore the VM state */
2295 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2297 error_report("Could not open VM state file");
2301 qemu_system_reset(VMRESET_SILENT
);
2302 ret
= qemu_loadvm_state(f
);
2306 error_report("Error %d while loading VM state", ret
);
2313 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2315 BlockDriverState
*bs
, *bs1
;
2317 const char *name
= qdict_get_str(qdict
, "name");
2319 bs
= bdrv_snapshots();
2321 monitor_printf(mon
, "No block device supports snapshots\n");
2326 while ((bs1
= bdrv_next(bs1
))) {
2327 if (bdrv_can_snapshot(bs1
)) {
2328 ret
= bdrv_snapshot_delete(bs1
, name
);
2330 if (ret
== -ENOTSUP
)
2332 "Snapshots not supported on device '%s'\n",
2333 bdrv_get_device_name(bs1
));
2335 monitor_printf(mon
, "Error %d while deleting snapshot on "
2336 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2342 void do_info_snapshots(Monitor
*mon
)
2344 BlockDriverState
*bs
, *bs1
;
2345 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2346 int nb_sns
, i
, ret
, available
;
2348 int *available_snapshots
;
2351 bs
= bdrv_snapshots();
2353 monitor_printf(mon
, "No available block device supports snapshots\n");
2357 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2359 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2364 monitor_printf(mon
, "There is no snapshot available.\n");
2368 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2370 for (i
= 0; i
< nb_sns
; i
++) {
2375 while ((bs1
= bdrv_next(bs1
))) {
2376 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2377 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2386 available_snapshots
[total
] = i
;
2392 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2393 for (i
= 0; i
< total
; i
++) {
2394 sn
= &sn_tab
[available_snapshots
[i
]];
2395 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2398 monitor_printf(mon
, "There is no suitable snapshot available\n");
2402 g_free(available_snapshots
);
2406 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2408 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2409 memory_region_name(mr
), dev
);
2412 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2414 /* Nothing do to while the implementation is in RAMBlock */
2417 void vmstate_register_ram_global(MemoryRegion
*mr
)
2419 vmstate_register_ram(mr
, NULL
);
2428 nzrun = length byte...
2430 length = uleb128 encoded integer
2432 int xbzrle_encode_buffer(uint8_t *old_buf
, uint8_t *new_buf
, int slen
,
2433 uint8_t *dst
, int dlen
)
2435 uint32_t zrun_len
= 0, nzrun_len
= 0;
2438 uint8_t *nzrun_start
= NULL
;
2440 g_assert(!(((uintptr_t)old_buf
| (uintptr_t)new_buf
| slen
) %
2449 /* not aligned to sizeof(long) */
2450 res
= (slen
- i
) % sizeof(long);
2451 while (res
&& old_buf
[i
] == new_buf
[i
]) {
2457 /* word at a time for speed */
2460 (*(long *)(old_buf
+ i
)) == (*(long *)(new_buf
+ i
))) {
2462 zrun_len
+= sizeof(long);
2465 /* go over the rest */
2466 while (i
< slen
&& old_buf
[i
] == new_buf
[i
]) {
2472 /* buffer unchanged */
2473 if (zrun_len
== slen
) {
2477 /* skip last zero run */
2482 d
+= uleb128_encode_small(dst
+ d
, zrun_len
);
2485 nzrun_start
= new_buf
+ i
;
2491 /* not aligned to sizeof(long) */
2492 res
= (slen
- i
) % sizeof(long);
2493 while (res
&& old_buf
[i
] != new_buf
[i
]) {
2499 /* word at a time for speed, use of 32-bit long okay */
2501 /* truncation to 32-bit long okay */
2502 long mask
= (long)0x0101010101010101ULL
;
2504 xor = *(long *)(old_buf
+ i
) ^ *(long *)(new_buf
+ i
);
2505 if ((xor - mask
) & ~xor & (mask
<< 7)) {
2506 /* found the end of an nzrun within the current long */
2507 while (old_buf
[i
] != new_buf
[i
]) {
2514 nzrun_len
+= sizeof(long);
2519 d
+= uleb128_encode_small(dst
+ d
, nzrun_len
);
2521 if (d
+ nzrun_len
> dlen
) {
2524 memcpy(dst
+ d
, nzrun_start
, nzrun_len
);
2532 int xbzrle_decode_buffer(uint8_t *src
, int slen
, uint8_t *dst
, int dlen
)
2541 if ((slen
- i
) < 2) {
2545 ret
= uleb128_decode_small(src
+ i
, &count
);
2546 if (ret
< 0 || (i
&& !count
)) {
2558 if ((slen
- i
) < 2) {
2562 ret
= uleb128_decode_small(src
+ i
, &count
);
2563 if (ret
< 0 || !count
) {
2569 if (d
+ count
> dlen
|| i
+ count
> slen
) {
2573 memcpy(dst
+ d
, src
+ i
, count
);