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
#define SELF_ANNOUNCE_ROUNDS 5
90
#define ETH_P_RARP 0x8035
92
#define ARP_HTYPE_ETH 0x0001
93
#define ARP_PTYPE_IP 0x0800
94
#define ARP_OP_REQUEST_REV 0x3
96
static int announce_self_create(uint8_t *buf,
99
/* Ethernet header. */
100
memset(buf, 0xff, 6); /* destination MAC addr */
101
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
102
*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
105
*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
106
*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
107
*(buf + 18) = 6; /* hardware addr length (ethernet) */
108
*(buf + 19) = 4; /* protocol addr length (IPv4) */
109
*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
110
memcpy(buf + 22, mac_addr, 6); /* source hw addr */
111
memset(buf + 28, 0x00, 4); /* source protocol addr */
112
memcpy(buf + 32, mac_addr, 6); /* target hw addr */
113
memset(buf + 38, 0x00, 4); /* target protocol addr */
115
/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
116
memset(buf + 42, 0x00, 18);
118
return 60; /* len (FCS will be added by hardware) */
121
static void qemu_announce_self_iter(NICState *nic, void *opaque)
126
len = announce_self_create(buf, nic->conf->macaddr.a);
128
qemu_send_packet_raw(&nic->nc, buf, len);
132
static void qemu_announce_self_once(void *opaque)
134
static int count = SELF_ANNOUNCE_ROUNDS;
135
QEMUTimer *timer = *(QEMUTimer **)opaque;
137
qemu_foreach_nic(qemu_announce_self_iter, NULL);
140
/* delay 50ms, 150ms, 250ms, ... */
141
qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
142
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
144
qemu_del_timer(timer);
145
qemu_free_timer(timer);
149
void qemu_announce_self(void)
151
static QEMUTimer *timer;
152
timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
153
qemu_announce_self_once(&timer);
156
/***********************************************************/
157
/* savevm/loadvm support */
159
#define IO_BUF_SIZE 32768
162
QEMUFilePutBufferFunc *put_buffer;
163
QEMUFileGetBufferFunc *get_buffer;
164
QEMUFileCloseFunc *close;
165
QEMUFileRateLimit *rate_limit;
166
QEMUFileSetRateLimit *set_rate_limit;
167
QEMUFileGetRateLimit *get_rate_limit;
171
int64_t buf_offset; /* start of buffer when writing, end of buffer
174
int buf_size; /* 0 when writing */
175
uint8_t buf[IO_BUF_SIZE];
180
typedef struct QEMUFileStdio
186
typedef struct QEMUFileSocket
192
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
194
QEMUFileSocket *s = opaque;
198
len = qemu_recv(s->fd, buf, size, 0);
199
} while (len == -1 && socket_error() == EINTR);
202
len = -socket_error();
207
static int socket_close(void *opaque)
209
QEMUFileSocket *s = opaque;
214
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
216
QEMUFileStdio *s = opaque;
217
return fwrite(buf, 1, size, s->stdio_file);
220
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
222
QEMUFileStdio *s = opaque;
223
FILE *fp = s->stdio_file;
228
bytes = fread(buf, 1, size, fp);
229
} while ((bytes == 0) && ferror(fp) && (errno == EINTR));
233
static int stdio_pclose(void *opaque)
235
QEMUFileStdio *s = opaque;
237
ret = pclose(s->stdio_file);
242
static int stdio_fclose(void *opaque)
244
QEMUFileStdio *s = opaque;
245
fclose(s->stdio_file);
250
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
254
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
255
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
259
s = g_malloc0(sizeof(QEMUFileStdio));
261
s->stdio_file = stdio_file;
264
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
267
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
273
QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
277
popen_file = popen(command, mode);
278
if(popen_file == NULL) {
282
return qemu_popen(popen_file, mode);
285
int qemu_stdio_fd(QEMUFile *f)
290
p = (QEMUFileStdio *)f->opaque;
291
fd = fileno(p->stdio_file);
296
QEMUFile *qemu_fdopen(int fd, const char *mode)
301
(mode[0] != 'r' && mode[0] != 'w') ||
302
mode[1] != 'b' || mode[2] != 0) {
303
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
307
s = g_malloc0(sizeof(QEMUFileStdio));
308
s->stdio_file = fdopen(fd, mode);
313
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
316
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
326
QEMUFile *qemu_fopen_socket(int fd)
328
QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
331
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
336
static int file_put_buffer(void *opaque, const uint8_t *buf,
337
int64_t pos, int size)
339
QEMUFileStdio *s = opaque;
340
fseek(s->stdio_file, pos, SEEK_SET);
341
return fwrite(buf, 1, size, s->stdio_file);
344
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
346
QEMUFileStdio *s = opaque;
347
fseek(s->stdio_file, pos, SEEK_SET);
348
return fread(buf, 1, size, s->stdio_file);
351
QEMUFile *qemu_fopen(const char *filename, const char *mode)
356
(mode[0] != 'r' && mode[0] != 'w') ||
357
mode[1] != 'b' || mode[2] != 0) {
358
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
362
s = g_malloc0(sizeof(QEMUFileStdio));
364
s->stdio_file = fopen(filename, mode);
369
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
372
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
381
static int block_put_buffer(void *opaque, const uint8_t *buf,
382
int64_t pos, int size)
384
bdrv_save_vmstate(opaque, buf, pos, size);
388
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
390
return bdrv_load_vmstate(opaque, buf, pos, size);
393
static int bdrv_fclose(void *opaque)
398
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
401
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
403
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL);
406
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
407
QEMUFileGetBufferFunc *get_buffer,
408
QEMUFileCloseFunc *close,
409
QEMUFileRateLimit *rate_limit,
410
QEMUFileSetRateLimit *set_rate_limit,
411
QEMUFileGetRateLimit *get_rate_limit)
415
f = g_malloc0(sizeof(QEMUFile));
418
f->put_buffer = put_buffer;
419
f->get_buffer = get_buffer;
421
f->rate_limit = rate_limit;
422
f->set_rate_limit = set_rate_limit;
423
f->get_rate_limit = get_rate_limit;
429
int qemu_file_get_error(QEMUFile *f)
431
return f->last_error;
434
void qemu_file_set_error(QEMUFile *f, int ret)
439
void qemu_fflush(QEMUFile *f)
444
if (f->is_write && f->buf_index > 0) {
447
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
449
f->buf_offset += f->buf_index;
451
f->last_error = -EINVAL;
456
static void qemu_fill_buffer(QEMUFile *f)
467
pending = f->buf_size - f->buf_index;
469
memmove(f->buf, f->buf + f->buf_index, pending);
472
f->buf_size = pending;
474
len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
475
IO_BUF_SIZE - pending);
478
f->buf_offset += len;
479
} else if (len == 0) {
480
f->last_error = -EIO;
481
} else if (len != -EAGAIN)
485
int qemu_fclose(QEMUFile *f)
490
ret = f->close(f->opaque);
495
void qemu_file_put_notify(QEMUFile *f)
497
f->put_buffer(f->opaque, NULL, 0, 0);
500
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
504
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
506
"Attempted to write to buffer while read buffer is not empty\n");
510
while (!f->last_error && size > 0) {
511
l = IO_BUF_SIZE - f->buf_index;
514
memcpy(f->buf + f->buf_index, buf, l);
519
if (f->buf_index >= IO_BUF_SIZE)
524
void qemu_put_byte(QEMUFile *f, int v)
526
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
528
"Attempted to write to buffer while read buffer is not empty\n");
532
f->buf[f->buf_index++] = v;
534
if (f->buf_index >= IO_BUF_SIZE)
538
static void qemu_file_skip(QEMUFile *f, int size)
540
if (f->buf_index + size <= f->buf_size) {
541
f->buf_index += size;
545
static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
554
index = f->buf_index + offset;
555
pending = f->buf_size - index;
556
if (pending < size) {
558
index = f->buf_index + offset;
559
pending = f->buf_size - index;
565
if (size > pending) {
569
memcpy(buf, f->buf + index, size);
573
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
578
while (pending > 0) {
581
res = qemu_peek_buffer(f, buf, pending, 0);
585
qemu_file_skip(f, res);
593
static int qemu_peek_byte(QEMUFile *f, int offset)
595
int index = f->buf_index + offset;
601
if (index >= f->buf_size) {
603
index = f->buf_index + offset;
604
if (index >= f->buf_size) {
608
return f->buf[index];
611
int qemu_get_byte(QEMUFile *f)
615
result = qemu_peek_byte(f, 0);
616
qemu_file_skip(f, 1);
620
int64_t qemu_ftell(QEMUFile *f)
622
return f->buf_offset - f->buf_size + f->buf_index;
625
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
627
if (whence == SEEK_SET) {
629
} else if (whence == SEEK_CUR) {
630
pos += qemu_ftell(f);
632
/* SEEK_END not supported */
646
int qemu_file_rate_limit(QEMUFile *f)
649
return f->rate_limit(f->opaque);
654
int64_t qemu_file_get_rate_limit(QEMUFile *f)
656
if (f->get_rate_limit)
657
return f->get_rate_limit(f->opaque);
662
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate)
664
/* any failed or completed migration keeps its state to allow probing of
665
* migration data, but has no associated file anymore */
666
if (f && f->set_rate_limit)
667
return f->set_rate_limit(f->opaque, new_rate);
672
void qemu_put_be16(QEMUFile *f, unsigned int v)
674
qemu_put_byte(f, v >> 8);
678
void qemu_put_be32(QEMUFile *f, unsigned int v)
680
qemu_put_byte(f, v >> 24);
681
qemu_put_byte(f, v >> 16);
682
qemu_put_byte(f, v >> 8);
686
void qemu_put_be64(QEMUFile *f, uint64_t v)
688
qemu_put_be32(f, v >> 32);
692
unsigned int qemu_get_be16(QEMUFile *f)
695
v = qemu_get_byte(f) << 8;
696
v |= qemu_get_byte(f);
700
unsigned int qemu_get_be32(QEMUFile *f)
703
v = qemu_get_byte(f) << 24;
704
v |= qemu_get_byte(f) << 16;
705
v |= qemu_get_byte(f) << 8;
706
v |= qemu_get_byte(f);
710
uint64_t qemu_get_be64(QEMUFile *f)
713
v = (uint64_t)qemu_get_be32(f) << 32;
714
v |= qemu_get_be32(f);
721
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
723
uint64_t expire_time;
725
expire_time = qemu_timer_expire_time_ns(ts);
726
qemu_put_be64(f, expire_time);
729
void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
731
uint64_t expire_time;
733
expire_time = qemu_get_be64(f);
734
if (expire_time != -1) {
735
qemu_mod_timer_ns(ts, expire_time);
744
static int get_bool(QEMUFile *f, void *pv, size_t size)
747
*v = qemu_get_byte(f);
751
static void put_bool(QEMUFile *f, void *pv, size_t size)
754
qemu_put_byte(f, *v);
757
const VMStateInfo vmstate_info_bool = {
765
static int get_int8(QEMUFile *f, void *pv, size_t size)
772
static void put_int8(QEMUFile *f, void *pv, size_t size)
778
const VMStateInfo vmstate_info_int8 = {
786
static int get_int16(QEMUFile *f, void *pv, size_t size)
789
qemu_get_sbe16s(f, v);
793
static void put_int16(QEMUFile *f, void *pv, size_t size)
796
qemu_put_sbe16s(f, v);
799
const VMStateInfo vmstate_info_int16 = {
807
static int get_int32(QEMUFile *f, void *pv, size_t size)
810
qemu_get_sbe32s(f, v);
814
static void put_int32(QEMUFile *f, void *pv, size_t size)
817
qemu_put_sbe32s(f, v);
820
const VMStateInfo vmstate_info_int32 = {
826
/* 32 bit int. See that the received value is the same than the one
829
static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
833
qemu_get_sbe32s(f, &v2);
840
const VMStateInfo vmstate_info_int32_equal = {
841
.name = "int32 equal",
842
.get = get_int32_equal,
846
/* 32 bit int. See that the received value is the less or the same
847
than the one in the field */
849
static int get_int32_le(QEMUFile *f, void *pv, size_t size)
853
qemu_get_sbe32s(f, &new);
860
const VMStateInfo vmstate_info_int32_le = {
861
.name = "int32 equal",
868
static int get_int64(QEMUFile *f, void *pv, size_t size)
871
qemu_get_sbe64s(f, v);
875
static void put_int64(QEMUFile *f, void *pv, size_t size)
878
qemu_put_sbe64s(f, v);
881
const VMStateInfo vmstate_info_int64 = {
887
/* 8 bit unsigned int */
889
static int get_uint8(QEMUFile *f, void *pv, size_t size)
896
static void put_uint8(QEMUFile *f, void *pv, size_t size)
902
const VMStateInfo vmstate_info_uint8 = {
908
/* 16 bit unsigned int */
910
static int get_uint16(QEMUFile *f, void *pv, size_t size)
913
qemu_get_be16s(f, v);
917
static void put_uint16(QEMUFile *f, void *pv, size_t size)
920
qemu_put_be16s(f, v);
923
const VMStateInfo vmstate_info_uint16 = {
929
/* 32 bit unsigned int */
931
static int get_uint32(QEMUFile *f, void *pv, size_t size)
934
qemu_get_be32s(f, v);
938
static void put_uint32(QEMUFile *f, void *pv, size_t size)
941
qemu_put_be32s(f, v);
944
const VMStateInfo vmstate_info_uint32 = {
950
/* 32 bit uint. See that the received value is the same than the one
953
static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
957
qemu_get_be32s(f, &v2);
965
const VMStateInfo vmstate_info_uint32_equal = {
966
.name = "uint32 equal",
967
.get = get_uint32_equal,
971
/* 64 bit unsigned int */
973
static int get_uint64(QEMUFile *f, void *pv, size_t size)
976
qemu_get_be64s(f, v);
980
static void put_uint64(QEMUFile *f, void *pv, size_t size)
983
qemu_put_be64s(f, v);
986
const VMStateInfo vmstate_info_uint64 = {
992
/* 8 bit int. See that the received value is the same than the one
995
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
1006
const VMStateInfo vmstate_info_uint8_equal = {
1007
.name = "uint8 equal",
1008
.get = get_uint8_equal,
1012
/* 16 bit unsigned int int. See that the received value is the same than the one
1015
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
1019
qemu_get_be16s(f, &v2);
1026
const VMStateInfo vmstate_info_uint16_equal = {
1027
.name = "uint16 equal",
1028
.get = get_uint16_equal,
1034
static int get_timer(QEMUFile *f, void *pv, size_t size)
1037
qemu_get_timer(f, v);
1041
static void put_timer(QEMUFile *f, void *pv, size_t size)
1044
qemu_put_timer(f, v);
1047
const VMStateInfo vmstate_info_timer = {
1053
/* uint8_t buffers */
1055
static int get_buffer(QEMUFile *f, void *pv, size_t size)
1058
qemu_get_buffer(f, v, size);
1062
static void put_buffer(QEMUFile *f, void *pv, size_t size)
1065
qemu_put_buffer(f, v, size);
1068
const VMStateInfo vmstate_info_buffer = {
1074
/* unused buffers: space that was used for some fields that are
1075
not useful anymore */
1077
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
1083
block_len = MIN(sizeof(buf), size);
1085
qemu_get_buffer(f, buf, block_len);
1090
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
1092
static const uint8_t buf[1024];
1096
block_len = MIN(sizeof(buf), size);
1098
qemu_put_buffer(f, buf, block_len);
1102
const VMStateInfo vmstate_info_unused_buffer = {
1103
.name = "unused_buffer",
1104
.get = get_unused_buffer,
1105
.put = put_unused_buffer,
1108
typedef struct CompatEntry {
1113
typedef struct SaveStateEntry {
1114
QTAILQ_ENTRY(SaveStateEntry) entry;
1120
SaveSetParamsHandler *set_params;
1121
SaveLiveStateHandler *save_live_state;
1122
SaveStateHandler *save_state;
1123
LoadStateHandler *load_state;
1124
const VMStateDescription *vmsd;
1126
CompatEntry *compat;
1131
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1132
QTAILQ_HEAD_INITIALIZER(savevm_handlers);
1133
static int global_section_id;
1135
static int calculate_new_instance_id(const char *idstr)
1138
int instance_id = 0;
1140
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1141
if (strcmp(idstr, se->idstr) == 0
1142
&& instance_id <= se->instance_id) {
1143
instance_id = se->instance_id + 1;
1149
static int calculate_compat_instance_id(const char *idstr)
1152
int instance_id = 0;
1154
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1158
if (strcmp(idstr, se->compat->idstr) == 0
1159
&& instance_id <= se->compat->instance_id) {
1160
instance_id = se->compat->instance_id + 1;
1166
/* TODO: Individual devices generally have very little idea about the rest
1167
of the system, so instance_id should be removed/replaced.
1168
Meanwhile pass -1 as instance_id if you do not already have a clearly
1169
distinguishing id for all instances of your device class. */
1170
int register_savevm_live(DeviceState *dev,
1174
SaveSetParamsHandler *set_params,
1175
SaveLiveStateHandler *save_live_state,
1176
SaveStateHandler *save_state,
1177
LoadStateHandler *load_state,
1182
se = g_malloc0(sizeof(SaveStateEntry));
1183
se->version_id = version_id;
1184
se->section_id = global_section_id++;
1185
se->set_params = set_params;
1186
se->save_live_state = save_live_state;
1187
se->save_state = save_state;
1188
se->load_state = load_state;
1189
se->opaque = opaque;
1193
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1194
char *id = dev->parent_bus->info->get_dev_path(dev);
1196
pstrcpy(se->idstr, sizeof(se->idstr), id);
1197
pstrcat(se->idstr, sizeof(se->idstr), "/");
1200
se->compat = g_malloc0(sizeof(CompatEntry));
1201
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
1202
se->compat->instance_id = instance_id == -1 ?
1203
calculate_compat_instance_id(idstr) : instance_id;
1207
pstrcat(se->idstr, sizeof(se->idstr), idstr);
1209
if (instance_id == -1) {
1210
se->instance_id = calculate_new_instance_id(se->idstr);
1212
se->instance_id = instance_id;
1214
assert(!se->compat || se->instance_id == 0);
1215
/* add at the end of list */
1216
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1220
int register_savevm(DeviceState *dev,
1224
SaveStateHandler *save_state,
1225
LoadStateHandler *load_state,
1228
return register_savevm_live(dev, idstr, instance_id, version_id,
1229
NULL, NULL, save_state, load_state, opaque);
1232
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
1234
SaveStateEntry *se, *new_se;
1237
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1238
char *path = dev->parent_bus->info->get_dev_path(dev);
1240
pstrcpy(id, sizeof(id), path);
1241
pstrcat(id, sizeof(id), "/");
1245
pstrcat(id, sizeof(id), idstr);
1247
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1248
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
1249
QTAILQ_REMOVE(&savevm_handlers, se, entry);
1258
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
1259
const VMStateDescription *vmsd,
1260
void *opaque, int alias_id,
1261
int required_for_version)
1265
/* If this triggers, alias support can be dropped for the vmsd. */
1266
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
1268
se = g_malloc0(sizeof(SaveStateEntry));
1269
se->version_id = vmsd->version_id;
1270
se->section_id = global_section_id++;
1271
se->save_live_state = NULL;
1272
se->save_state = NULL;
1273
se->load_state = NULL;
1274
se->opaque = opaque;
1276
se->alias_id = alias_id;
1277
se->no_migrate = vmsd->unmigratable;
1279
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1280
char *id = dev->parent_bus->info->get_dev_path(dev);
1282
pstrcpy(se->idstr, sizeof(se->idstr), id);
1283
pstrcat(se->idstr, sizeof(se->idstr), "/");
1286
se->compat = g_malloc0(sizeof(CompatEntry));
1287
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
1288
se->compat->instance_id = instance_id == -1 ?
1289
calculate_compat_instance_id(vmsd->name) : instance_id;
1293
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
1295
if (instance_id == -1) {
1296
se->instance_id = calculate_new_instance_id(se->idstr);
1298
se->instance_id = instance_id;
1300
assert(!se->compat || se->instance_id == 0);
1301
/* add at the end of list */
1302
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1306
int vmstate_register(DeviceState *dev, int instance_id,
1307
const VMStateDescription *vmsd, void *opaque)
1309
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
1313
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
1316
SaveStateEntry *se, *new_se;
1318
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1319
if (se->vmsd == vmsd && se->opaque == opaque) {
1320
QTAILQ_REMOVE(&savevm_handlers, se, entry);
1329
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1331
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1334
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1335
void *opaque, int version_id)
1337
VMStateField *field = vmsd->fields;
1340
if (version_id > vmsd->version_id) {
1343
if (version_id < vmsd->minimum_version_id_old) {
1346
if (version_id < vmsd->minimum_version_id) {
1347
return vmsd->load_state_old(f, opaque, version_id);
1349
if (vmsd->pre_load) {
1350
int ret = vmsd->pre_load(opaque);
1354
while(field->name) {
1355
if ((field->field_exists &&
1356
field->field_exists(opaque, version_id)) ||
1357
(!field->field_exists &&
1358
field->version_id <= version_id)) {
1359
void *base_addr = opaque + field->offset;
1361
int size = field->size;
1363
if (field->flags & VMS_VBUFFER) {
1364
size = *(int32_t *)(opaque+field->size_offset);
1365
if (field->flags & VMS_MULTIPLY) {
1366
size *= field->size;
1369
if (field->flags & VMS_ARRAY) {
1370
n_elems = field->num;
1371
} else if (field->flags & VMS_VARRAY_INT32) {
1372
n_elems = *(int32_t *)(opaque+field->num_offset);
1373
} else if (field->flags & VMS_VARRAY_UINT32) {
1374
n_elems = *(uint32_t *)(opaque+field->num_offset);
1375
} else if (field->flags & VMS_VARRAY_UINT16) {
1376
n_elems = *(uint16_t *)(opaque+field->num_offset);
1377
} else if (field->flags & VMS_VARRAY_UINT8) {
1378
n_elems = *(uint8_t *)(opaque+field->num_offset);
1380
if (field->flags & VMS_POINTER) {
1381
base_addr = *(void **)base_addr + field->start;
1383
for (i = 0; i < n_elems; i++) {
1384
void *addr = base_addr + size * i;
1386
if (field->flags & VMS_ARRAY_OF_POINTER) {
1387
addr = *(void **)addr;
1389
if (field->flags & VMS_STRUCT) {
1390
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
1392
ret = field->info->get(f, addr, size);
1402
ret = vmstate_subsection_load(f, vmsd, opaque);
1406
if (vmsd->post_load) {
1407
return vmsd->post_load(opaque, version_id);
1412
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
1415
VMStateField *field = vmsd->fields;
1417
if (vmsd->pre_save) {
1418
vmsd->pre_save(opaque);
1420
while(field->name) {
1421
if (!field->field_exists ||
1422
field->field_exists(opaque, vmsd->version_id)) {
1423
void *base_addr = opaque + field->offset;
1425
int size = field->size;
1427
if (field->flags & VMS_VBUFFER) {
1428
size = *(int32_t *)(opaque+field->size_offset);
1429
if (field->flags & VMS_MULTIPLY) {
1430
size *= field->size;
1433
if (field->flags & VMS_ARRAY) {
1434
n_elems = field->num;
1435
} else if (field->flags & VMS_VARRAY_INT32) {
1436
n_elems = *(int32_t *)(opaque+field->num_offset);
1437
} else if (field->flags & VMS_VARRAY_UINT16) {
1438
n_elems = *(uint16_t *)(opaque+field->num_offset);
1439
} else if (field->flags & VMS_VARRAY_UINT8) {
1440
n_elems = *(uint8_t *)(opaque+field->num_offset);
1442
if (field->flags & VMS_POINTER) {
1443
base_addr = *(void **)base_addr + field->start;
1445
for (i = 0; i < n_elems; i++) {
1446
void *addr = base_addr + size * i;
1448
if (field->flags & VMS_ARRAY_OF_POINTER) {
1449
addr = *(void **)addr;
1451
if (field->flags & VMS_STRUCT) {
1452
vmstate_save_state(f, field->vmsd, addr);
1454
field->info->put(f, addr, size);
1460
vmstate_subsection_save(f, vmsd, opaque);
1463
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1465
if (!se->vmsd) { /* Old style */
1466
return se->load_state(f, se->opaque, version_id);
1468
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
1471
static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
1473
if (!se->vmsd) { /* Old style */
1474
se->save_state(f, se->opaque);
1477
vmstate_save_state(f,se->vmsd, se->opaque);
1480
#define QEMU_VM_FILE_MAGIC 0x5145564d
1481
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1482
#define QEMU_VM_FILE_VERSION 0x00000003
1484
#define QEMU_VM_EOF 0x00
1485
#define QEMU_VM_SECTION_START 0x01
1486
#define QEMU_VM_SECTION_PART 0x02
1487
#define QEMU_VM_SECTION_END 0x03
1488
#define QEMU_VM_SECTION_FULL 0x04
1489
#define QEMU_VM_SUBSECTION 0x05
1491
bool qemu_savevm_state_blocked(Monitor *mon)
1495
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1496
if (se->no_migrate) {
1497
monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
1505
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
1511
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1512
if(se->set_params == NULL) {
1515
se->set_params(blk_enable, shared, se->opaque);
1518
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1519
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1521
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1524
if (se->save_live_state == NULL)
1528
qemu_put_byte(f, QEMU_VM_SECTION_START);
1529
qemu_put_be32(f, se->section_id);
1532
len = strlen(se->idstr);
1533
qemu_put_byte(f, len);
1534
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1536
qemu_put_be32(f, se->instance_id);
1537
qemu_put_be32(f, se->version_id);
1539
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
1541
qemu_savevm_state_cancel(mon, f);
1545
ret = qemu_file_get_error(f);
1547
qemu_savevm_state_cancel(mon, f);
1555
* this funtion has three return values:
1556
* negative: there was one error, and we have -errno.
1557
* 0 : We haven't finished, caller have to go again
1558
* 1 : We have finished, we can go to complete phase
1560
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
1565
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1566
if (se->save_live_state == NULL)
1570
qemu_put_byte(f, QEMU_VM_SECTION_PART);
1571
qemu_put_be32(f, se->section_id);
1573
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
1575
/* Do not proceed to the next vmstate before this one reported
1576
completion of the current stage. This serializes the migration
1577
and reduces the probability that a faster changing state is
1578
synchronized over and over again. */
1585
ret = qemu_file_get_error(f);
1587
qemu_savevm_state_cancel(mon, f);
1592
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
1597
cpu_synchronize_all_states();
1599
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1600
if (se->save_live_state == NULL)
1604
qemu_put_byte(f, QEMU_VM_SECTION_END);
1605
qemu_put_be32(f, se->section_id);
1607
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
1613
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1616
if (se->save_state == NULL && se->vmsd == NULL)
1620
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1621
qemu_put_be32(f, se->section_id);
1624
len = strlen(se->idstr);
1625
qemu_put_byte(f, len);
1626
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1628
qemu_put_be32(f, se->instance_id);
1629
qemu_put_be32(f, se->version_id);
1631
vmstate_save(f, se);
1634
qemu_put_byte(f, QEMU_VM_EOF);
1636
return qemu_file_get_error(f);
1639
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
1643
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1644
if (se->save_live_state) {
1645
se->save_live_state(mon, f, -1, se->opaque);
1650
static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
1654
if (qemu_savevm_state_blocked(mon)) {
1659
ret = qemu_savevm_state_begin(mon, f, 0, 0);
1664
ret = qemu_savevm_state_iterate(mon, f);
1669
ret = qemu_savevm_state_complete(mon, f);
1673
ret = qemu_file_get_error(f);
1679
static SaveStateEntry *find_se(const char *idstr, int instance_id)
1683
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1684
if (!strcmp(se->idstr, idstr) &&
1685
(instance_id == se->instance_id ||
1686
instance_id == se->alias_id))
1688
/* Migrating from an older version? */
1689
if (strstr(se->idstr, idstr) && se->compat) {
1690
if (!strcmp(se->compat->idstr, idstr) &&
1691
(instance_id == se->compat->instance_id ||
1692
instance_id == se->alias_id))
1699
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
1701
while(sub && sub->needed) {
1702
if (strcmp(idstr, sub->vmsd->name) == 0) {
1710
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1713
while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
1716
uint8_t version_id, len, size;
1717
const VMStateDescription *sub_vmsd;
1719
len = qemu_peek_byte(f, 1);
1720
if (len < strlen(vmsd->name) + 1) {
1721
/* subsection name has be be "section_name/a" */
1724
size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
1730
if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) {
1731
/* it don't have a valid subsection name */
1734
sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr);
1735
if (sub_vmsd == NULL) {
1738
qemu_file_skip(f, 1); /* subsection */
1739
qemu_file_skip(f, 1); /* len */
1740
qemu_file_skip(f, len); /* idstr */
1741
version_id = qemu_get_be32(f);
1743
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
1751
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1754
const VMStateSubsection *sub = vmsd->subsections;
1756
while (sub && sub->needed) {
1757
if (sub->needed(opaque)) {
1758
const VMStateDescription *vmsd = sub->vmsd;
1761
qemu_put_byte(f, QEMU_VM_SUBSECTION);
1762
len = strlen(vmsd->name);
1763
qemu_put_byte(f, len);
1764
qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
1765
qemu_put_be32(f, vmsd->version_id);
1766
vmstate_save_state(f, vmsd, opaque);
1772
typedef struct LoadStateEntry {
1773
QLIST_ENTRY(LoadStateEntry) entry;
1779
int qemu_loadvm_state(QEMUFile *f)
1781
QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1782
QLIST_HEAD_INITIALIZER(loadvm_handlers);
1783
LoadStateEntry *le, *new_le;
1784
uint8_t section_type;
1788
if (qemu_savevm_state_blocked(default_mon)) {
1792
v = qemu_get_be32(f);
1793
if (v != QEMU_VM_FILE_MAGIC)
1796
v = qemu_get_be32(f);
1797
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1798
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1801
if (v != QEMU_VM_FILE_VERSION)
1804
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1805
uint32_t instance_id, version_id, section_id;
1810
switch (section_type) {
1811
case QEMU_VM_SECTION_START:
1812
case QEMU_VM_SECTION_FULL:
1813
/* Read section start */
1814
section_id = qemu_get_be32(f);
1815
len = qemu_get_byte(f);
1816
qemu_get_buffer(f, (uint8_t *)idstr, len);
1818
instance_id = qemu_get_be32(f);
1819
version_id = qemu_get_be32(f);
1821
/* Find savevm section */
1822
se = find_se(idstr, instance_id);
1824
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
1829
/* Validate version */
1830
if (version_id > se->version_id) {
1831
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
1832
version_id, idstr, se->version_id);
1838
le = g_malloc0(sizeof(*le));
1841
le->section_id = section_id;
1842
le->version_id = version_id;
1843
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
1845
ret = vmstate_load(f, le->se, le->version_id);
1847
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1848
instance_id, idstr);
1852
case QEMU_VM_SECTION_PART:
1853
case QEMU_VM_SECTION_END:
1854
section_id = qemu_get_be32(f);
1856
QLIST_FOREACH(le, &loadvm_handlers, entry) {
1857
if (le->section_id == section_id) {
1862
fprintf(stderr, "Unknown savevm section %d\n", section_id);
1867
ret = vmstate_load(f, le->se, le->version_id);
1869
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
1875
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1881
cpu_synchronize_all_post_init();
1886
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
1887
QLIST_REMOVE(le, entry);
1892
ret = qemu_file_get_error(f);
1898
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1901
QEMUSnapshotInfo *sn_tab, *sn;
1905
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1908
for(i = 0; i < nb_sns; i++) {
1910
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1921
* Deletes snapshots of a given name in all opened images.
1923
static int del_existing_snapshots(Monitor *mon, const char *name)
1925
BlockDriverState *bs;
1926
QEMUSnapshotInfo sn1, *snapshot = &sn1;
1930
while ((bs = bdrv_next(bs))) {
1931
if (bdrv_can_snapshot(bs) &&
1932
bdrv_snapshot_find(bs, snapshot, name) >= 0)
1934
ret = bdrv_snapshot_delete(bs, name);
1937
"Error while deleting snapshot on '%s'\n",
1938
bdrv_get_device_name(bs));
1947
void do_savevm(Monitor *mon, const QDict *qdict)
1949
BlockDriverState *bs, *bs1;
1950
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1953
int saved_vm_running;
1954
uint32_t vm_state_size;
1962
const char *name = qdict_get_try_str(qdict, "name");
1964
/* Verify if there is a device that doesn't support snapshots and is writable */
1966
while ((bs = bdrv_next(bs))) {
1968
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
1972
if (!bdrv_can_snapshot(bs)) {
1973
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
1974
bdrv_get_device_name(bs));
1979
bs = bdrv_snapshots();
1981
monitor_printf(mon, "No block device can accept snapshots\n");
1985
saved_vm_running = runstate_is_running();
1986
vm_stop(RUN_STATE_SAVE_VM);
1988
memset(sn, 0, sizeof(*sn));
1990
/* fill auxiliary fields */
1993
sn->date_sec = tb.time;
1994
sn->date_nsec = tb.millitm * 1000000;
1996
gettimeofday(&tv, NULL);
1997
sn->date_sec = tv.tv_sec;
1998
sn->date_nsec = tv.tv_usec * 1000;
2000
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
2003
ret = bdrv_snapshot_find(bs, old_sn, name);
2005
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
2006
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
2008
pstrcpy(sn->name, sizeof(sn->name), name);
2012
ptm = localtime(&tb.time);
2013
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
2015
/* cast below needed for OpenBSD where tv_sec is still 'long' */
2016
localtime_r((const time_t *)&tv.tv_sec, &tm);
2017
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
2021
/* Delete old snapshots of the same name */
2022
if (name && del_existing_snapshots(mon, name) < 0) {
2026
/* save the VM state */
2027
f = qemu_fopen_bdrv(bs, 1);
2029
monitor_printf(mon, "Could not open VM state file\n");
2032
ret = qemu_savevm_state(mon, f);
2033
vm_state_size = qemu_ftell(f);
2036
monitor_printf(mon, "Error %d while writing VM\n", ret);
2040
/* create the snapshots */
2043
while ((bs1 = bdrv_next(bs1))) {
2044
if (bdrv_can_snapshot(bs1)) {
2045
/* Write VM state size only to the image that contains the state */
2046
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
2047
ret = bdrv_snapshot_create(bs1, sn);
2049
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
2050
bdrv_get_device_name(bs1));
2056
if (saved_vm_running)
2060
int load_vmstate(const char *name)
2062
BlockDriverState *bs, *bs_vm_state;
2063
QEMUSnapshotInfo sn;
2067
bs_vm_state = bdrv_snapshots();
2069
error_report("No block device supports snapshots");
2073
/* Don't even try to load empty VM states */
2074
ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
2077
} else if (sn.vm_state_size == 0) {
2078
error_report("This is a disk-only snapshot. Revert to it offline "
2083
/* Verify if there is any device that doesn't support snapshots and is
2084
writable and check if the requested snapshot is available too. */
2086
while ((bs = bdrv_next(bs))) {
2088
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
2092
if (!bdrv_can_snapshot(bs)) {
2093
error_report("Device '%s' is writable but does not support snapshots.",
2094
bdrv_get_device_name(bs));
2098
ret = bdrv_snapshot_find(bs, &sn, name);
2100
error_report("Device '%s' does not have the requested snapshot '%s'",
2101
bdrv_get_device_name(bs), name);
2106
/* Flush all IO requests so they don't interfere with the new state. */
2110
while ((bs = bdrv_next(bs))) {
2111
if (bdrv_can_snapshot(bs)) {
2112
ret = bdrv_snapshot_goto(bs, name);
2114
error_report("Error %d while activating snapshot '%s' on '%s'",
2115
ret, name, bdrv_get_device_name(bs));
2121
/* restore the VM state */
2122
f = qemu_fopen_bdrv(bs_vm_state, 0);
2124
error_report("Could not open VM state file");
2128
qemu_system_reset(VMRESET_SILENT);
2129
ret = qemu_loadvm_state(f);
2133
error_report("Error %d while loading VM state", ret);
2140
void do_delvm(Monitor *mon, const QDict *qdict)
2142
BlockDriverState *bs, *bs1;
2144
const char *name = qdict_get_str(qdict, "name");
2146
bs = bdrv_snapshots();
2148
monitor_printf(mon, "No block device supports snapshots\n");
2153
while ((bs1 = bdrv_next(bs1))) {
2154
if (bdrv_can_snapshot(bs1)) {
2155
ret = bdrv_snapshot_delete(bs1, name);
2157
if (ret == -ENOTSUP)
2159
"Snapshots not supported on device '%s'\n",
2160
bdrv_get_device_name(bs1));
2162
monitor_printf(mon, "Error %d while deleting snapshot on "
2163
"'%s'\n", ret, bdrv_get_device_name(bs1));
2169
void do_info_snapshots(Monitor *mon)
2171
BlockDriverState *bs, *bs1;
2172
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
2173
int nb_sns, i, ret, available;
2175
int *available_snapshots;
2178
bs = bdrv_snapshots();
2180
monitor_printf(mon, "No available block device supports snapshots\n");
2184
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
2186
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
2191
monitor_printf(mon, "There is no snapshot available.\n");
2195
available_snapshots = g_malloc0(sizeof(int) * nb_sns);
2197
for (i = 0; i < nb_sns; i++) {
2202
while ((bs1 = bdrv_next(bs1))) {
2203
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
2204
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
2213
available_snapshots[total] = i;
2219
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
2220
for (i = 0; i < total; i++) {
2221
sn = &sn_tab[available_snapshots[i]];
2222
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
2225
monitor_printf(mon, "There is no suitable snapshot available\n");
2229
g_free(available_snapshots);