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"
86 #define SELF_ANNOUNCE_ROUNDS 5
89 #define ETH_P_RARP 0x8035
91 #define ARP_HTYPE_ETH 0x0001
92 #define ARP_PTYPE_IP 0x0800
93 #define ARP_OP_REQUEST_REV 0x3
95 static int announce_self_create(uint8_t *buf,
98 /* Ethernet header. */
99 memset(buf, 0xff, 6); /* destination MAC addr */
100 memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
101 *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
104 *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
105 *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
106 *(buf + 18) = 6; /* hardware addr length (ethernet) */
107 *(buf + 19) = 4; /* protocol addr length (IPv4) */
108 *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
109 memcpy(buf + 22, mac_addr, 6); /* source hw addr */
110 memset(buf + 28, 0x00, 4); /* source protocol addr */
111 memcpy(buf + 32, mac_addr, 6); /* target hw addr */
112 memset(buf + 38, 0x00, 4); /* target protocol addr */
114 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
115 memset(buf + 42, 0x00, 18);
117 return 60; /* len (FCS will be added by hardware) */
120 static void qemu_announce_self_iter(NICState *nic, void *opaque)
125 len = announce_self_create(buf, nic->conf->macaddr.a);
127 qemu_send_packet_raw(&nic->nc, buf, len);
131 static void qemu_announce_self_once(void *opaque)
133 static int count = SELF_ANNOUNCE_ROUNDS;
134 QEMUTimer *timer = *(QEMUTimer **)opaque;
136 qemu_foreach_nic(qemu_announce_self_iter, NULL);
139 /* delay 50ms, 150ms, 250ms, ... */
140 qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
141 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
143 qemu_del_timer(timer);
144 qemu_free_timer(timer);
148 void qemu_announce_self(void)
150 static QEMUTimer *timer;
151 timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
152 qemu_announce_self_once(&timer);
155 /***********************************************************/
156 /* savevm/loadvm support */
158 #define IO_BUF_SIZE 32768
161 QEMUFilePutBufferFunc *put_buffer;
162 QEMUFileGetBufferFunc *get_buffer;
163 QEMUFileCloseFunc *close;
164 QEMUFileRateLimit *rate_limit;
165 QEMUFileSetRateLimit *set_rate_limit;
166 QEMUFileGetRateLimit *get_rate_limit;
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_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
193 QEMUFileSocket *s = opaque;
197 len = qemu_recv(s->fd, buf, size, 0);
198 } while (len == -1 && socket_error() == EINTR);
201 len = -socket_error();
206 static int socket_close(void *opaque)
208 QEMUFileSocket *s = opaque;
213 static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
215 QEMUFileStdio *s = opaque;
216 return fwrite(buf, 1, size, s->stdio_file);
219 static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
221 QEMUFileStdio *s = opaque;
222 FILE *fp = s->stdio_file;
227 bytes = fread(buf, 1, size, fp);
228 } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
232 static int stdio_pclose(void *opaque)
234 QEMUFileStdio *s = opaque;
236 ret = pclose(s->stdio_file);
241 static int stdio_fclose(void *opaque)
243 QEMUFileStdio *s = opaque;
244 fclose(s->stdio_file);
249 QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
253 if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
254 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
258 s = g_malloc0(sizeof(QEMUFileStdio));
260 s->stdio_file = stdio_file;
263 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
266 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
272 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
276 popen_file = popen(command, mode);
277 if(popen_file == NULL) {
281 return qemu_popen(popen_file, mode);
284 int qemu_stdio_fd(QEMUFile *f)
289 p = (QEMUFileStdio *)f->opaque;
290 fd = fileno(p->stdio_file);
295 QEMUFile *qemu_fdopen(int fd, const char *mode)
300 (mode[0] != 'r' && mode[0] != 'w') ||
301 mode[1] != 'b' || mode[2] != 0) {
302 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
306 s = g_malloc0(sizeof(QEMUFileStdio));
307 s->stdio_file = fdopen(fd, mode);
312 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
315 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
325 QEMUFile *qemu_fopen_socket(int fd)
327 QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
330 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
335 static int file_put_buffer(void *opaque, const uint8_t *buf,
336 int64_t pos, int size)
338 QEMUFileStdio *s = opaque;
339 fseek(s->stdio_file, pos, SEEK_SET);
340 return fwrite(buf, 1, size, s->stdio_file);
343 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
345 QEMUFileStdio *s = opaque;
346 fseek(s->stdio_file, pos, SEEK_SET);
347 return fread(buf, 1, size, s->stdio_file);
350 QEMUFile *qemu_fopen(const char *filename, const char *mode)
355 (mode[0] != 'r' && mode[0] != 'w') ||
356 mode[1] != 'b' || mode[2] != 0) {
357 fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
361 s = g_malloc0(sizeof(QEMUFileStdio));
363 s->stdio_file = fopen(filename, mode);
368 s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
371 s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
380 static int block_put_buffer(void *opaque, const uint8_t *buf,
381 int64_t pos, int size)
383 bdrv_save_vmstate(opaque, buf, pos, size);
387 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
389 return bdrv_load_vmstate(opaque, buf, pos, size);
392 static int bdrv_fclose(void *opaque)
397 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
400 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
402 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL);
405 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
406 QEMUFileGetBufferFunc *get_buffer,
407 QEMUFileCloseFunc *close,
408 QEMUFileRateLimit *rate_limit,
409 QEMUFileSetRateLimit *set_rate_limit,
410 QEMUFileGetRateLimit *get_rate_limit)
414 f = g_malloc0(sizeof(QEMUFile));
417 f->put_buffer = put_buffer;
418 f->get_buffer = get_buffer;
420 f->rate_limit = rate_limit;
421 f->set_rate_limit = set_rate_limit;
422 f->get_rate_limit = get_rate_limit;
428 int qemu_file_get_error(QEMUFile *f)
433 void qemu_file_set_error(QEMUFile *f, int ret)
438 void qemu_fflush(QEMUFile *f)
443 if (f->is_write && f->buf_index > 0) {
446 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
448 f->buf_offset += f->buf_index;
450 f->has_error = -EINVAL;
455 static void qemu_fill_buffer(QEMUFile *f)
466 pending = f->buf_size - f->buf_index;
468 memmove(f->buf, f->buf + f->buf_index, pending);
471 f->buf_size = pending;
473 len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
474 IO_BUF_SIZE - pending);
477 f->buf_offset += len;
478 } else if (len != -EAGAIN)
482 int qemu_fclose(QEMUFile *f)
487 ret = f->close(f->opaque);
492 void qemu_file_put_notify(QEMUFile *f)
494 f->put_buffer(f->opaque, NULL, 0, 0);
497 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
501 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
503 "Attempted to write to buffer while read buffer is not empty\n");
507 while (!f->has_error && size > 0) {
508 l = IO_BUF_SIZE - f->buf_index;
511 memcpy(f->buf + f->buf_index, buf, l);
516 if (f->buf_index >= IO_BUF_SIZE)
521 void qemu_put_byte(QEMUFile *f, int v)
523 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
525 "Attempted to write to buffer while read buffer is not empty\n");
529 f->buf[f->buf_index++] = v;
531 if (f->buf_index >= IO_BUF_SIZE)
535 static void qemu_file_skip(QEMUFile *f, int size)
537 if (f->buf_index + size <= f->buf_size) {
538 f->buf_index += size;
542 static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
551 index = f->buf_index + offset;
552 pending = f->buf_size - index;
553 if (pending < size) {
555 index = f->buf_index + offset;
556 pending = f->buf_size - index;
562 if (size > pending) {
566 memcpy(buf, f->buf + index, size);
570 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
575 while (pending > 0) {
578 res = qemu_peek_buffer(f, buf, pending, 0);
582 qemu_file_skip(f, res);
590 static int qemu_peek_byte(QEMUFile *f, int offset)
592 int index = f->buf_index + offset;
598 if (index >= f->buf_size) {
600 index = f->buf_index + offset;
601 if (index >= f->buf_size) {
605 return f->buf[index];
608 int qemu_get_byte(QEMUFile *f)
612 result = qemu_peek_byte(f, 0);
613 qemu_file_skip(f, 1);
617 int64_t qemu_ftell(QEMUFile *f)
619 return f->buf_offset - f->buf_size + f->buf_index;
622 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
624 if (whence == SEEK_SET) {
626 } else if (whence == SEEK_CUR) {
627 pos += qemu_ftell(f);
629 /* SEEK_END not supported */
643 int qemu_file_rate_limit(QEMUFile *f)
646 return f->rate_limit(f->opaque);
651 int64_t qemu_file_get_rate_limit(QEMUFile *f)
653 if (f->get_rate_limit)
654 return f->get_rate_limit(f->opaque);
659 int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate)
661 /* any failed or completed migration keeps its state to allow probing of
662 * migration data, but has no associated file anymore */
663 if (f && f->set_rate_limit)
664 return f->set_rate_limit(f->opaque, new_rate);
669 void qemu_put_be16(QEMUFile *f, unsigned int v)
671 qemu_put_byte(f, v >> 8);
675 void qemu_put_be32(QEMUFile *f, unsigned int v)
677 qemu_put_byte(f, v >> 24);
678 qemu_put_byte(f, v >> 16);
679 qemu_put_byte(f, v >> 8);
683 void qemu_put_be64(QEMUFile *f, uint64_t v)
685 qemu_put_be32(f, v >> 32);
689 unsigned int qemu_get_be16(QEMUFile *f)
692 v = qemu_get_byte(f) << 8;
693 v |= qemu_get_byte(f);
697 unsigned int qemu_get_be32(QEMUFile *f)
700 v = qemu_get_byte(f) << 24;
701 v |= qemu_get_byte(f) << 16;
702 v |= qemu_get_byte(f) << 8;
703 v |= qemu_get_byte(f);
707 uint64_t qemu_get_be64(QEMUFile *f)
710 v = (uint64_t)qemu_get_be32(f) << 32;
711 v |= qemu_get_be32(f);
717 static int get_bool(QEMUFile *f, void *pv, size_t size)
720 *v = qemu_get_byte(f);
724 static void put_bool(QEMUFile *f, void *pv, size_t size)
727 qemu_put_byte(f, *v);
730 const VMStateInfo vmstate_info_bool = {
738 static int get_int8(QEMUFile *f, void *pv, size_t size)
745 static void put_int8(QEMUFile *f, void *pv, size_t size)
751 const VMStateInfo vmstate_info_int8 = {
759 static int get_int16(QEMUFile *f, void *pv, size_t size)
762 qemu_get_sbe16s(f, v);
766 static void put_int16(QEMUFile *f, void *pv, size_t size)
769 qemu_put_sbe16s(f, v);
772 const VMStateInfo vmstate_info_int16 = {
780 static int get_int32(QEMUFile *f, void *pv, size_t size)
783 qemu_get_sbe32s(f, v);
787 static void put_int32(QEMUFile *f, void *pv, size_t size)
790 qemu_put_sbe32s(f, v);
793 const VMStateInfo vmstate_info_int32 = {
799 /* 32 bit int. See that the received value is the same than the one
802 static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
806 qemu_get_sbe32s(f, &v2);
813 const VMStateInfo vmstate_info_int32_equal = {
814 .name = "int32 equal",
815 .get = get_int32_equal,
819 /* 32 bit int. See that the received value is the less or the same
820 than the one in the field */
822 static int get_int32_le(QEMUFile *f, void *pv, size_t size)
826 qemu_get_sbe32s(f, &new);
833 const VMStateInfo vmstate_info_int32_le = {
834 .name = "int32 equal",
841 static int get_int64(QEMUFile *f, void *pv, size_t size)
844 qemu_get_sbe64s(f, v);
848 static void put_int64(QEMUFile *f, void *pv, size_t size)
851 qemu_put_sbe64s(f, v);
854 const VMStateInfo vmstate_info_int64 = {
860 /* 8 bit unsigned int */
862 static int get_uint8(QEMUFile *f, void *pv, size_t size)
869 static void put_uint8(QEMUFile *f, void *pv, size_t size)
875 const VMStateInfo vmstate_info_uint8 = {
881 /* 16 bit unsigned int */
883 static int get_uint16(QEMUFile *f, void *pv, size_t size)
886 qemu_get_be16s(f, v);
890 static void put_uint16(QEMUFile *f, void *pv, size_t size)
893 qemu_put_be16s(f, v);
896 const VMStateInfo vmstate_info_uint16 = {
902 /* 32 bit unsigned int */
904 static int get_uint32(QEMUFile *f, void *pv, size_t size)
907 qemu_get_be32s(f, v);
911 static void put_uint32(QEMUFile *f, void *pv, size_t size)
914 qemu_put_be32s(f, v);
917 const VMStateInfo vmstate_info_uint32 = {
923 /* 32 bit uint. See that the received value is the same than the one
926 static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
930 qemu_get_be32s(f, &v2);
938 const VMStateInfo vmstate_info_uint32_equal = {
939 .name = "uint32 equal",
940 .get = get_uint32_equal,
944 /* 64 bit unsigned int */
946 static int get_uint64(QEMUFile *f, void *pv, size_t size)
949 qemu_get_be64s(f, v);
953 static void put_uint64(QEMUFile *f, void *pv, size_t size)
956 qemu_put_be64s(f, v);
959 const VMStateInfo vmstate_info_uint64 = {
965 /* 8 bit int. See that the received value is the same than the one
968 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
979 const VMStateInfo vmstate_info_uint8_equal = {
980 .name = "uint8 equal",
981 .get = get_uint8_equal,
985 /* 16 bit unsigned int int. See that the received value is the same than the one
988 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
992 qemu_get_be16s(f, &v2);
999 const VMStateInfo vmstate_info_uint16_equal = {
1000 .name = "uint16 equal",
1001 .get = get_uint16_equal,
1007 static int get_timer(QEMUFile *f, void *pv, size_t size)
1010 qemu_get_timer(f, v);
1014 static void put_timer(QEMUFile *f, void *pv, size_t size)
1017 qemu_put_timer(f, v);
1020 const VMStateInfo vmstate_info_timer = {
1026 /* uint8_t buffers */
1028 static int get_buffer(QEMUFile *f, void *pv, size_t size)
1031 qemu_get_buffer(f, v, size);
1035 static void put_buffer(QEMUFile *f, void *pv, size_t size)
1038 qemu_put_buffer(f, v, size);
1041 const VMStateInfo vmstate_info_buffer = {
1047 /* unused buffers: space that was used for some fields that are
1048 not useful anymore */
1050 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
1056 block_len = MIN(sizeof(buf), size);
1058 qemu_get_buffer(f, buf, block_len);
1063 static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
1065 static const uint8_t buf[1024];
1069 block_len = MIN(sizeof(buf), size);
1071 qemu_put_buffer(f, buf, block_len);
1075 const VMStateInfo vmstate_info_unused_buffer = {
1076 .name = "unused_buffer",
1077 .get = get_unused_buffer,
1078 .put = put_unused_buffer,
1081 typedef struct CompatEntry {
1086 typedef struct SaveStateEntry {
1087 QTAILQ_ENTRY(SaveStateEntry) entry;
1093 SaveSetParamsHandler *set_params;
1094 SaveLiveStateHandler *save_live_state;
1095 SaveStateHandler *save_state;
1096 LoadStateHandler *load_state;
1097 const VMStateDescription *vmsd;
1099 CompatEntry *compat;
1104 static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1105 QTAILQ_HEAD_INITIALIZER(savevm_handlers);
1106 static int global_section_id;
1108 static int calculate_new_instance_id(const char *idstr)
1111 int instance_id = 0;
1113 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1114 if (strcmp(idstr, se->idstr) == 0
1115 && instance_id <= se->instance_id) {
1116 instance_id = se->instance_id + 1;
1122 static int calculate_compat_instance_id(const char *idstr)
1125 int instance_id = 0;
1127 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1131 if (strcmp(idstr, se->compat->idstr) == 0
1132 && instance_id <= se->compat->instance_id) {
1133 instance_id = se->compat->instance_id + 1;
1139 /* TODO: Individual devices generally have very little idea about the rest
1140 of the system, so instance_id should be removed/replaced.
1141 Meanwhile pass -1 as instance_id if you do not already have a clearly
1142 distinguishing id for all instances of your device class. */
1143 int register_savevm_live(DeviceState *dev,
1147 SaveSetParamsHandler *set_params,
1148 SaveLiveStateHandler *save_live_state,
1149 SaveStateHandler *save_state,
1150 LoadStateHandler *load_state,
1155 se = g_malloc0(sizeof(SaveStateEntry));
1156 se->version_id = version_id;
1157 se->section_id = global_section_id++;
1158 se->set_params = set_params;
1159 se->save_live_state = save_live_state;
1160 se->save_state = save_state;
1161 se->load_state = load_state;
1162 se->opaque = opaque;
1166 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1167 char *id = dev->parent_bus->info->get_dev_path(dev);
1169 pstrcpy(se->idstr, sizeof(se->idstr), id);
1170 pstrcat(se->idstr, sizeof(se->idstr), "/");
1173 se->compat = g_malloc0(sizeof(CompatEntry));
1174 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
1175 se->compat->instance_id = instance_id == -1 ?
1176 calculate_compat_instance_id(idstr) : instance_id;
1180 pstrcat(se->idstr, sizeof(se->idstr), idstr);
1182 if (instance_id == -1) {
1183 se->instance_id = calculate_new_instance_id(se->idstr);
1185 se->instance_id = instance_id;
1187 assert(!se->compat || se->instance_id == 0);
1188 /* add at the end of list */
1189 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1193 int register_savevm(DeviceState *dev,
1197 SaveStateHandler *save_state,
1198 LoadStateHandler *load_state,
1201 return register_savevm_live(dev, idstr, instance_id, version_id,
1202 NULL, NULL, save_state, load_state, opaque);
1205 void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
1207 SaveStateEntry *se, *new_se;
1210 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1211 char *path = dev->parent_bus->info->get_dev_path(dev);
1213 pstrcpy(id, sizeof(id), path);
1214 pstrcat(id, sizeof(id), "/");
1218 pstrcat(id, sizeof(id), idstr);
1220 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1221 if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
1222 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1231 /* mark a device as not to be migrated, that is the device should be
1232 unplugged before migration */
1233 void register_device_unmigratable(DeviceState *dev, const char *idstr,
1239 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1240 char *path = dev->parent_bus->info->get_dev_path(dev);
1242 pstrcpy(id, sizeof(id), path);
1243 pstrcat(id, sizeof(id), "/");
1247 pstrcat(id, sizeof(id), idstr);
1249 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1250 if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
1256 int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
1257 const VMStateDescription *vmsd,
1258 void *opaque, int alias_id,
1259 int required_for_version)
1263 /* If this triggers, alias support can be dropped for the vmsd. */
1264 assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
1266 se = g_malloc0(sizeof(SaveStateEntry));
1267 se->version_id = vmsd->version_id;
1268 se->section_id = global_section_id++;
1269 se->save_live_state = NULL;
1270 se->save_state = NULL;
1271 se->load_state = NULL;
1272 se->opaque = opaque;
1274 se->alias_id = alias_id;
1275 se->no_migrate = vmsd->unmigratable;
1277 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1278 char *id = dev->parent_bus->info->get_dev_path(dev);
1280 pstrcpy(se->idstr, sizeof(se->idstr), id);
1281 pstrcat(se->idstr, sizeof(se->idstr), "/");
1284 se->compat = g_malloc0(sizeof(CompatEntry));
1285 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
1286 se->compat->instance_id = instance_id == -1 ?
1287 calculate_compat_instance_id(vmsd->name) : instance_id;
1291 pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
1293 if (instance_id == -1) {
1294 se->instance_id = calculate_new_instance_id(se->idstr);
1296 se->instance_id = instance_id;
1298 assert(!se->compat || se->instance_id == 0);
1299 /* add at the end of list */
1300 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1304 int vmstate_register(DeviceState *dev, int instance_id,
1305 const VMStateDescription *vmsd, void *opaque)
1307 return vmstate_register_with_alias_id(dev, instance_id, vmsd,
1311 void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
1314 SaveStateEntry *se, *new_se;
1316 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1317 if (se->vmsd == vmsd && se->opaque == opaque) {
1318 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1327 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1329 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1332 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1333 void *opaque, int version_id)
1335 VMStateField *field = vmsd->fields;
1338 if (version_id > vmsd->version_id) {
1341 if (version_id < vmsd->minimum_version_id_old) {
1344 if (version_id < vmsd->minimum_version_id) {
1345 return vmsd->load_state_old(f, opaque, version_id);
1347 if (vmsd->pre_load) {
1348 int ret = vmsd->pre_load(opaque);
1352 while(field->name) {
1353 if ((field->field_exists &&
1354 field->field_exists(opaque, version_id)) ||
1355 (!field->field_exists &&
1356 field->version_id <= version_id)) {
1357 void *base_addr = opaque + field->offset;
1359 int size = field->size;
1361 if (field->flags & VMS_VBUFFER) {
1362 size = *(int32_t *)(opaque+field->size_offset);
1363 if (field->flags & VMS_MULTIPLY) {
1364 size *= field->size;
1367 if (field->flags & VMS_ARRAY) {
1368 n_elems = field->num;
1369 } else if (field->flags & VMS_VARRAY_INT32) {
1370 n_elems = *(int32_t *)(opaque+field->num_offset);
1371 } else if (field->flags & VMS_VARRAY_UINT32) {
1372 n_elems = *(uint32_t *)(opaque+field->num_offset);
1373 } else if (field->flags & VMS_VARRAY_UINT16) {
1374 n_elems = *(uint16_t *)(opaque+field->num_offset);
1375 } else if (field->flags & VMS_VARRAY_UINT8) {
1376 n_elems = *(uint8_t *)(opaque+field->num_offset);
1378 if (field->flags & VMS_POINTER) {
1379 base_addr = *(void **)base_addr + field->start;
1381 for (i = 0; i < n_elems; i++) {
1382 void *addr = base_addr + size * i;
1384 if (field->flags & VMS_ARRAY_OF_POINTER) {
1385 addr = *(void **)addr;
1387 if (field->flags & VMS_STRUCT) {
1388 ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
1390 ret = field->info->get(f, addr, size);
1400 ret = vmstate_subsection_load(f, vmsd, opaque);
1404 if (vmsd->post_load) {
1405 return vmsd->post_load(opaque, version_id);
1410 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
1413 VMStateField *field = vmsd->fields;
1415 if (vmsd->pre_save) {
1416 vmsd->pre_save(opaque);
1418 while(field->name) {
1419 if (!field->field_exists ||
1420 field->field_exists(opaque, vmsd->version_id)) {
1421 void *base_addr = opaque + field->offset;
1423 int size = field->size;
1425 if (field->flags & VMS_VBUFFER) {
1426 size = *(int32_t *)(opaque+field->size_offset);
1427 if (field->flags & VMS_MULTIPLY) {
1428 size *= field->size;
1431 if (field->flags & VMS_ARRAY) {
1432 n_elems = field->num;
1433 } else if (field->flags & VMS_VARRAY_INT32) {
1434 n_elems = *(int32_t *)(opaque+field->num_offset);
1435 } else if (field->flags & VMS_VARRAY_UINT16) {
1436 n_elems = *(uint16_t *)(opaque+field->num_offset);
1437 } else if (field->flags & VMS_VARRAY_UINT8) {
1438 n_elems = *(uint8_t *)(opaque+field->num_offset);
1440 if (field->flags & VMS_POINTER) {
1441 base_addr = *(void **)base_addr + field->start;
1443 for (i = 0; i < n_elems; i++) {
1444 void *addr = base_addr + size * i;
1446 if (field->flags & VMS_ARRAY_OF_POINTER) {
1447 addr = *(void **)addr;
1449 if (field->flags & VMS_STRUCT) {
1450 vmstate_save_state(f, field->vmsd, addr);
1452 field->info->put(f, addr, size);
1458 vmstate_subsection_save(f, vmsd, opaque);
1461 static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1463 if (!se->vmsd) { /* Old style */
1464 return se->load_state(f, se->opaque, version_id);
1466 return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
1469 static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
1471 if (!se->vmsd) { /* Old style */
1472 se->save_state(f, se->opaque);
1475 vmstate_save_state(f,se->vmsd, se->opaque);
1478 #define QEMU_VM_FILE_MAGIC 0x5145564d
1479 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1480 #define QEMU_VM_FILE_VERSION 0x00000003
1482 #define QEMU_VM_EOF 0x00
1483 #define QEMU_VM_SECTION_START 0x01
1484 #define QEMU_VM_SECTION_PART 0x02
1485 #define QEMU_VM_SECTION_END 0x03
1486 #define QEMU_VM_SECTION_FULL 0x04
1487 #define QEMU_VM_SUBSECTION 0x05
1489 bool qemu_savevm_state_blocked(Monitor *mon)
1493 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1494 if (se->no_migrate) {
1495 monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
1503 int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
1509 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1510 if(se->set_params == NULL) {
1513 se->set_params(blk_enable, shared, se->opaque);
1516 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1517 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1519 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1522 if (se->save_live_state == NULL)
1526 qemu_put_byte(f, QEMU_VM_SECTION_START);
1527 qemu_put_be32(f, se->section_id);
1530 len = strlen(se->idstr);
1531 qemu_put_byte(f, len);
1532 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1534 qemu_put_be32(f, se->instance_id);
1535 qemu_put_be32(f, se->version_id);
1537 se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
1539 ret = qemu_file_get_error(f);
1541 qemu_savevm_state_cancel(mon, f);
1549 * this funtion has three return values:
1550 * negative: there was one error, and we have -errno.
1551 * 0 : We haven't finished, caller have to go again
1552 * 1 : We have finished, we can go to complete phase
1554 int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
1559 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1560 if (se->save_live_state == NULL)
1564 qemu_put_byte(f, QEMU_VM_SECTION_PART);
1565 qemu_put_be32(f, se->section_id);
1567 ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
1569 /* Do not proceed to the next vmstate before this one reported
1570 completion of the current stage. This serializes the migration
1571 and reduces the probability that a faster changing state is
1572 synchronized over and over again. */
1579 ret = qemu_file_get_error(f);
1581 qemu_savevm_state_cancel(mon, f);
1586 int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
1590 cpu_synchronize_all_states();
1592 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1593 if (se->save_live_state == NULL)
1597 qemu_put_byte(f, QEMU_VM_SECTION_END);
1598 qemu_put_be32(f, se->section_id);
1600 se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
1603 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1606 if (se->save_state == NULL && se->vmsd == NULL)
1610 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1611 qemu_put_be32(f, se->section_id);
1614 len = strlen(se->idstr);
1615 qemu_put_byte(f, len);
1616 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1618 qemu_put_be32(f, se->instance_id);
1619 qemu_put_be32(f, se->version_id);
1621 vmstate_save(f, se);
1624 qemu_put_byte(f, QEMU_VM_EOF);
1626 return qemu_file_get_error(f);
1629 void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
1633 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1634 if (se->save_live_state) {
1635 se->save_live_state(mon, f, -1, se->opaque);
1640 static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
1642 int saved_vm_running;
1645 saved_vm_running = runstate_is_running();
1646 vm_stop(RUN_STATE_SAVE_VM);
1648 if (qemu_savevm_state_blocked(mon)) {
1653 ret = qemu_savevm_state_begin(mon, f, 0, 0);
1658 ret = qemu_savevm_state_iterate(mon, f);
1663 ret = qemu_savevm_state_complete(mon, f);
1667 ret = qemu_file_get_error(f);
1670 if (!ret && saved_vm_running)
1676 static SaveStateEntry *find_se(const char *idstr, int instance_id)
1680 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1681 if (!strcmp(se->idstr, idstr) &&
1682 (instance_id == se->instance_id ||
1683 instance_id == se->alias_id))
1685 /* Migrating from an older version? */
1686 if (strstr(se->idstr, idstr) && se->compat) {
1687 if (!strcmp(se->compat->idstr, idstr) &&
1688 (instance_id == se->compat->instance_id ||
1689 instance_id == se->alias_id))
1696 static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
1698 while(sub && sub->needed) {
1699 if (strcmp(idstr, sub->vmsd->name) == 0) {
1707 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1710 while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
1713 uint8_t version_id, len, size;
1714 const VMStateDescription *sub_vmsd;
1716 len = qemu_peek_byte(f, 1);
1717 if (len < strlen(vmsd->name) + 1) {
1718 /* subsection name has be be "section_name/a" */
1721 size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
1727 if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) {
1728 /* it don't have a valid subsection name */
1731 sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr);
1732 if (sub_vmsd == NULL) {
1735 qemu_file_skip(f, 1); /* subsection */
1736 qemu_file_skip(f, 1); /* len */
1737 qemu_file_skip(f, len); /* idstr */
1738 version_id = qemu_get_be32(f);
1740 ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
1748 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1751 const VMStateSubsection *sub = vmsd->subsections;
1753 while (sub && sub->needed) {
1754 if (sub->needed(opaque)) {
1755 const VMStateDescription *vmsd = sub->vmsd;
1758 qemu_put_byte(f, QEMU_VM_SUBSECTION);
1759 len = strlen(vmsd->name);
1760 qemu_put_byte(f, len);
1761 qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
1762 qemu_put_be32(f, vmsd->version_id);
1763 vmstate_save_state(f, vmsd, opaque);
1769 typedef struct LoadStateEntry {
1770 QLIST_ENTRY(LoadStateEntry) entry;
1776 int qemu_loadvm_state(QEMUFile *f)
1778 QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1779 QLIST_HEAD_INITIALIZER(loadvm_handlers);
1780 LoadStateEntry *le, *new_le;
1781 uint8_t section_type;
1785 if (qemu_savevm_state_blocked(default_mon)) {
1789 v = qemu_get_be32(f);
1790 if (v != QEMU_VM_FILE_MAGIC)
1793 v = qemu_get_be32(f);
1794 if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1795 fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1798 if (v != QEMU_VM_FILE_VERSION)
1801 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1802 uint32_t instance_id, version_id, section_id;
1807 switch (section_type) {
1808 case QEMU_VM_SECTION_START:
1809 case QEMU_VM_SECTION_FULL:
1810 /* Read section start */
1811 section_id = qemu_get_be32(f);
1812 len = qemu_get_byte(f);
1813 qemu_get_buffer(f, (uint8_t *)idstr, len);
1815 instance_id = qemu_get_be32(f);
1816 version_id = qemu_get_be32(f);
1818 /* Find savevm section */
1819 se = find_se(idstr, instance_id);
1821 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
1826 /* Validate version */
1827 if (version_id > se->version_id) {
1828 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
1829 version_id, idstr, se->version_id);
1835 le = g_malloc0(sizeof(*le));
1838 le->section_id = section_id;
1839 le->version_id = version_id;
1840 QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
1842 ret = vmstate_load(f, le->se, le->version_id);
1844 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1845 instance_id, idstr);
1849 case QEMU_VM_SECTION_PART:
1850 case QEMU_VM_SECTION_END:
1851 section_id = qemu_get_be32(f);
1853 QLIST_FOREACH(le, &loadvm_handlers, entry) {
1854 if (le->section_id == section_id) {
1859 fprintf(stderr, "Unknown savevm section %d\n", section_id);
1864 ret = vmstate_load(f, le->se, le->version_id);
1866 fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
1872 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1878 cpu_synchronize_all_post_init();
1883 QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
1884 QLIST_REMOVE(le, entry);
1888 if (qemu_file_get_error(f)) {
1895 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1898 QEMUSnapshotInfo *sn_tab, *sn;
1902 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1905 for(i = 0; i < nb_sns; i++) {
1907 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1918 * Deletes snapshots of a given name in all opened images.
1920 static int del_existing_snapshots(Monitor *mon, const char *name)
1922 BlockDriverState *bs;
1923 QEMUSnapshotInfo sn1, *snapshot = &sn1;
1927 while ((bs = bdrv_next(bs))) {
1928 if (bdrv_can_snapshot(bs) &&
1929 bdrv_snapshot_find(bs, snapshot, name) >= 0)
1931 ret = bdrv_snapshot_delete(bs, name);
1934 "Error while deleting snapshot on '%s'\n",
1935 bdrv_get_device_name(bs));
1944 void do_savevm(Monitor *mon, const QDict *qdict)
1946 BlockDriverState *bs, *bs1;
1947 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1950 int saved_vm_running;
1951 uint32_t vm_state_size;
1959 const char *name = qdict_get_try_str(qdict, "name");
1961 /* Verify if there is a device that doesn't support snapshots and is writable */
1963 while ((bs = bdrv_next(bs))) {
1965 if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
1969 if (!bdrv_can_snapshot(bs)) {
1970 monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
1971 bdrv_get_device_name(bs));
1976 bs = bdrv_snapshots();
1978 monitor_printf(mon, "No block device can accept snapshots\n");
1982 saved_vm_running = runstate_is_running();
1983 vm_stop(RUN_STATE_SAVE_VM);
1985 memset(sn, 0, sizeof(*sn));
1987 /* fill auxiliary fields */
1990 sn->date_sec = tb.time;
1991 sn->date_nsec = tb.millitm * 1000000;
1993 gettimeofday(&tv, NULL);
1994 sn->date_sec = tv.tv_sec;
1995 sn->date_nsec = tv.tv_usec * 1000;
1997 sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
2000 ret = bdrv_snapshot_find(bs, old_sn, name);
2002 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
2003 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
2005 pstrcpy(sn->name, sizeof(sn->name), name);
2009 ptm = localtime(&tb.time);
2010 strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
2012 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2013 localtime_r((const time_t *)&tv.tv_sec, &tm);
2014 strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
2018 /* Delete old snapshots of the same name */
2019 if (name && del_existing_snapshots(mon, name) < 0) {
2023 /* save the VM state */
2024 f = qemu_fopen_bdrv(bs, 1);
2026 monitor_printf(mon, "Could not open VM state file\n");
2029 ret = qemu_savevm_state(mon, f);
2030 vm_state_size = qemu_ftell(f);
2033 monitor_printf(mon, "Error %d while writing VM\n", ret);
2037 /* create the snapshots */
2040 while ((bs1 = bdrv_next(bs1))) {
2041 if (bdrv_can_snapshot(bs1)) {
2042 /* Write VM state size only to the image that contains the state */
2043 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
2044 ret = bdrv_snapshot_create(bs1, sn);
2046 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
2047 bdrv_get_device_name(bs1));
2053 if (saved_vm_running)
2057 int load_vmstate(const char *name)
2059 BlockDriverState *bs, *bs_vm_state;
2060 QEMUSnapshotInfo sn;
2064 bs_vm_state = bdrv_snapshots();
2066 error_report("No block device supports snapshots");
2070 /* Don't even try to load empty VM states */
2071 ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
2074 } else if (sn.vm_state_size == 0) {
2075 error_report("This is a disk-only snapshot. Revert to it offline "
2080 /* Verify if there is any device that doesn't support snapshots and is
2081 writable and check if the requested snapshot is available too. */
2083 while ((bs = bdrv_next(bs))) {
2085 if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
2089 if (!bdrv_can_snapshot(bs)) {
2090 error_report("Device '%s' is writable but does not support snapshots.",
2091 bdrv_get_device_name(bs));
2095 ret = bdrv_snapshot_find(bs, &sn, name);
2097 error_report("Device '%s' does not have the requested snapshot '%s'",
2098 bdrv_get_device_name(bs), name);
2103 /* Flush all IO requests so they don't interfere with the new state. */
2107 while ((bs = bdrv_next(bs))) {
2108 if (bdrv_can_snapshot(bs)) {
2109 ret = bdrv_snapshot_goto(bs, name);
2111 error_report("Error %d while activating snapshot '%s' on '%s'",
2112 ret, name, bdrv_get_device_name(bs));
2118 /* restore the VM state */
2119 f = qemu_fopen_bdrv(bs_vm_state, 0);
2121 error_report("Could not open VM state file");
2125 qemu_system_reset(VMRESET_SILENT);
2126 ret = qemu_loadvm_state(f);
2130 error_report("Error %d while loading VM state", ret);
2137 void do_delvm(Monitor *mon, const QDict *qdict)
2139 BlockDriverState *bs, *bs1;
2141 const char *name = qdict_get_str(qdict, "name");
2143 bs = bdrv_snapshots();
2145 monitor_printf(mon, "No block device supports snapshots\n");
2150 while ((bs1 = bdrv_next(bs1))) {
2151 if (bdrv_can_snapshot(bs1)) {
2152 ret = bdrv_snapshot_delete(bs1, name);
2154 if (ret == -ENOTSUP)
2156 "Snapshots not supported on device '%s'\n",
2157 bdrv_get_device_name(bs1));
2159 monitor_printf(mon, "Error %d while deleting snapshot on "
2160 "'%s'\n", ret, bdrv_get_device_name(bs1));
2166 void do_info_snapshots(Monitor *mon)
2168 BlockDriverState *bs, *bs1;
2169 QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
2170 int nb_sns, i, ret, available;
2172 int *available_snapshots;
2175 bs = bdrv_snapshots();
2177 monitor_printf(mon, "No available block device supports snapshots\n");
2181 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
2183 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
2188 monitor_printf(mon, "There is no snapshot available.\n");
2192 available_snapshots = g_malloc0(sizeof(int) * nb_sns);
2194 for (i = 0; i < nb_sns; i++) {
2199 while ((bs1 = bdrv_next(bs1))) {
2200 if (bdrv_can_snapshot(bs1) && bs1 != bs) {
2201 ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
2210 available_snapshots[total] = i;
2216 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
2217 for (i = 0; i < total; i++) {
2218 sn = &sn_tab[available_snapshots[i]];
2219 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
2222 monitor_printf(mon, "There is no suitable snapshot available\n");
2226 g_free(available_snapshots);