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
32 /* Needed early for CONFIG_BSD etc. */
33 #include "config-host.h"
36 #include <sys/times.h>
40 #include <sys/ioctl.h>
41 #include <sys/resource.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
45 #include <arpa/inet.h>
48 #include <sys/select.h>
51 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
59 #include <linux/rtc.h>
67 #include <sys/timeb.h>
69 #define getopt_long_only getopt_long
70 #define memalign(align, size) malloc(size)
73 #include "qemu-common.h"
78 #include "qemu-timer.h"
79 #include "qemu-char.h"
81 #include "audio/audio.h"
82 #include "migration.h"
83 #include "qemu_socket.h"
84 #include "qemu-queue.h"
86 /* point to the block driver where the snapshots are managed */
87 static BlockDriverState *bs_snapshots;
89 #define SELF_ANNOUNCE_ROUNDS 5
92 #define ETH_P_RARP 0x8035
94 #define ARP_HTYPE_ETH 0x0001
95 #define ARP_PTYPE_IP 0x0800
96 #define ARP_OP_REQUEST_REV 0x3
98 static int announce_self_create(uint8_t *buf,
101 /* Ethernet header. */
102 memset(buf, 0xff, 6); /* destination MAC addr */
103 memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
104 *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
107 *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
108 *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
109 *(buf + 18) = 6; /* hardware addr length (ethernet) */
110 *(buf + 19) = 4; /* protocol addr length (IPv4) */
111 *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
112 memcpy(buf + 22, mac_addr, 6); /* source hw addr */
113 memset(buf + 28, 0x00, 4); /* source protocol addr */
114 memcpy(buf + 32, mac_addr, 6); /* target hw addr */
115 memset(buf + 38, 0x00, 4); /* target protocol addr */
117 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
118 memset(buf + 42, 0x00, 18);
120 return 60; /* len (FCS will be added by hardware) */
123 static void qemu_announce_self_iter(NICState *nic, void *opaque)
128 len = announce_self_create(buf, nic->conf->macaddr.a);
130 qemu_send_packet_raw(&nic->nc, buf, len);
134 static void qemu_announce_self_once(void *opaque)
136 static int count = SELF_ANNOUNCE_ROUNDS;
137 QEMUTimer *timer = *(QEMUTimer **)opaque;
139 qemu_foreach_nic(qemu_announce_self_iter, NULL);
142 /* delay 50ms, 150ms, 250ms, ... */
143 qemu_mod_timer(timer, qemu_get_clock(rt_clock) +
144 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
146 qemu_del_timer(timer);
147 qemu_free_timer(timer);
151 void qemu_announce_self(void)
153 static QEMUTimer *timer;
154 timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer);
155 qemu_announce_self_once(&timer);
158 /***********************************************************/
159 /* savevm/loadvm support */
161 #define IO_BUF_SIZE 32768
164 QEMUFilePutBufferFunc *put_buffer;
165 QEMUFileGetBufferFunc *get_buffer;
166 QEMUFileCloseFunc *close;
167 QEMUFileRateLimit *rate_limit;
168 QEMUFileSetRateLimit *set_rate_limit;
169 QEMUFileGetRateLimit *get_rate_limit;
173 int64_t buf_offset; /* start of buffer when writing, end of buffer
176 int buf_size; /* 0 when writing */
177 uint8_t buf[IO_BUF_SIZE];
182 typedef struct QEMUFileStdio
188 typedef struct QEMUFileSocket
194 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
196 QEMUFileSocket *s = opaque;
200 len = recv(s->fd, (void *)buf, size, 0);
201 } while (len == -1 && socket_error() == EINTR);
204 len = -socket_error();
209 static int socket_close(void *opaque)
211 QEMUFileSocket *s = opaque;
216 static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
218 QEMUFileStdio *s = opaque;
219 return fwrite(buf, 1, size, s->stdio_file);
222 static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
224 QEMUFileStdio *s = opaque;
225 FILE *fp = s->stdio_file;
230 bytes = fread(buf, 1, size, fp);
231 } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
235 static int stdio_pclose(void *opaque)
237 QEMUFileStdio *s = opaque;
238 pclose(s->stdio_file);
243 static int stdio_fclose(void *opaque)
245 QEMUFileStdio *s = opaque;
246 fclose(s->stdio_file);
251 QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
255 if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
256 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
260 s = qemu_mallocz(sizeof(QEMUFileStdio));
262 s->stdio_file = stdio_file;
265 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
268 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
274 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
278 popen_file = popen(command, mode);
279 if(popen_file == NULL) {
283 return qemu_popen(popen_file, mode);
286 int qemu_stdio_fd(QEMUFile *f)
291 p = (QEMUFileStdio *)f->opaque;
292 fd = fileno(p->stdio_file);
297 QEMUFile *qemu_fdopen(int fd, const char *mode)
302 (mode[0] != 'r' && mode[0] != 'w') ||
303 mode[1] != 'b' || mode[2] != 0) {
304 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
308 s = qemu_mallocz(sizeof(QEMUFileStdio));
309 s->stdio_file = fdopen(fd, mode);
314 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
317 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
327 QEMUFile *qemu_fopen_socket(int fd)
329 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
332 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
337 static int file_put_buffer(void *opaque, const uint8_t *buf,
338 int64_t pos, int size)
340 QEMUFileStdio *s = opaque;
341 fseek(s->stdio_file, pos, SEEK_SET);
342 return fwrite(buf, 1, size, s->stdio_file);
345 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
347 QEMUFileStdio *s = opaque;
348 fseek(s->stdio_file, pos, SEEK_SET);
349 return fread(buf, 1, size, s->stdio_file);
352 QEMUFile *qemu_fopen(const char *filename, const char *mode)
357 (mode[0] != 'r' && mode[0] != 'w') ||
358 mode[1] != 'b' || mode[2] != 0) {
359 fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
363 s = qemu_mallocz(sizeof(QEMUFileStdio));
365 s->stdio_file = fopen(filename, mode);
370 s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
373 s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
382 static int block_put_buffer(void *opaque, const uint8_t *buf,
383 int64_t pos, int size)
385 bdrv_save_vmstate(opaque, buf, pos, size);
389 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
391 return bdrv_load_vmstate(opaque, buf, pos, size);
394 static int bdrv_fclose(void *opaque)
399 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
402 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
404 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL);
407 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
408 QEMUFileGetBufferFunc *get_buffer,
409 QEMUFileCloseFunc *close,
410 QEMUFileRateLimit *rate_limit,
411 QEMUFileSetRateLimit *set_rate_limit,
412 QEMUFileGetRateLimit *get_rate_limit)
416 f = qemu_mallocz(sizeof(QEMUFile));
419 f->put_buffer = put_buffer;
420 f->get_buffer = get_buffer;
422 f->rate_limit = rate_limit;
423 f->set_rate_limit = set_rate_limit;
424 f->get_rate_limit = get_rate_limit;
430 int qemu_file_has_error(QEMUFile *f)
435 void qemu_file_set_error(QEMUFile *f)
440 void qemu_fflush(QEMUFile *f)
445 if (f->is_write && f->buf_index > 0) {
448 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
450 f->buf_offset += f->buf_index;
457 static void qemu_fill_buffer(QEMUFile *f)
467 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
471 f->buf_offset += len;
472 } else if (len != -EAGAIN)
476 int qemu_fclose(QEMUFile *f)
481 ret = f->close(f->opaque);
486 void qemu_file_put_notify(QEMUFile *f)
488 f->put_buffer(f->opaque, NULL, 0, 0);
491 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
495 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
497 "Attempted to write to buffer while read buffer is not empty\n");
501 while (!f->has_error && size > 0) {
502 l = IO_BUF_SIZE - f->buf_index;
505 memcpy(f->buf + f->buf_index, buf, l);
510 if (f->buf_index >= IO_BUF_SIZE)
515 void qemu_put_byte(QEMUFile *f, int v)
517 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
519 "Attempted to write to buffer while read buffer is not empty\n");
523 f->buf[f->buf_index++] = v;
525 if (f->buf_index >= IO_BUF_SIZE)
529 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
538 l = f->buf_size - f->buf_index;
541 l = f->buf_size - f->buf_index;
547 memcpy(buf, f->buf + f->buf_index, l);
555 int qemu_get_byte(QEMUFile *f)
560 if (f->buf_index >= f->buf_size) {
562 if (f->buf_index >= f->buf_size)
565 return f->buf[f->buf_index++];
568 int64_t qemu_ftell(QEMUFile *f)
570 return f->buf_offset - f->buf_size + f->buf_index;
573 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
575 if (whence == SEEK_SET) {
577 } else if (whence == SEEK_CUR) {
578 pos += qemu_ftell(f);
580 /* SEEK_END not supported */
594 int qemu_file_rate_limit(QEMUFile *f)
597 return f->rate_limit(f->opaque);
602 size_t qemu_file_get_rate_limit(QEMUFile *f)
604 if (f->get_rate_limit)
605 return f->get_rate_limit(f->opaque);
610 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
612 /* any failed or completed migration keeps its state to allow probing of
613 * migration data, but has no associated file anymore */
614 if (f && f->set_rate_limit)
615 return f->set_rate_limit(f->opaque, new_rate);
620 void qemu_put_be16(QEMUFile *f, unsigned int v)
622 qemu_put_byte(f, v >> 8);
626 void qemu_put_be32(QEMUFile *f, unsigned int v)
628 qemu_put_byte(f, v >> 24);
629 qemu_put_byte(f, v >> 16);
630 qemu_put_byte(f, v >> 8);
634 void qemu_put_be64(QEMUFile *f, uint64_t v)
636 qemu_put_be32(f, v >> 32);
640 unsigned int qemu_get_be16(QEMUFile *f)
643 v = qemu_get_byte(f) << 8;
644 v |= qemu_get_byte(f);
648 unsigned int qemu_get_be32(QEMUFile *f)
651 v = qemu_get_byte(f) << 24;
652 v |= qemu_get_byte(f) << 16;
653 v |= qemu_get_byte(f) << 8;
654 v |= qemu_get_byte(f);
658 uint64_t qemu_get_be64(QEMUFile *f)
661 v = (uint64_t)qemu_get_be32(f) << 32;
662 v |= qemu_get_be32(f);
668 static int get_int8(QEMUFile *f, void *pv, size_t size)
675 static void put_int8(QEMUFile *f, void *pv, size_t size)
681 const VMStateInfo vmstate_info_int8 = {
689 static int get_int16(QEMUFile *f, void *pv, size_t size)
692 qemu_get_sbe16s(f, v);
696 static void put_int16(QEMUFile *f, void *pv, size_t size)
699 qemu_put_sbe16s(f, v);
702 const VMStateInfo vmstate_info_int16 = {
710 static int get_int32(QEMUFile *f, void *pv, size_t size)
713 qemu_get_sbe32s(f, v);
717 static void put_int32(QEMUFile *f, void *pv, size_t size)
720 qemu_put_sbe32s(f, v);
723 const VMStateInfo vmstate_info_int32 = {
729 /* 32 bit int. See that the received value is the same than the one
732 static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
736 qemu_get_sbe32s(f, &v2);
743 const VMStateInfo vmstate_info_int32_equal = {
744 .name = "int32 equal",
745 .get = get_int32_equal,
749 /* 32 bit int. See that the received value is the less or the same
750 than the one in the field */
752 static int get_int32_le(QEMUFile *f, void *pv, size_t size)
756 qemu_get_sbe32s(f, &new);
763 const VMStateInfo vmstate_info_int32_le = {
764 .name = "int32 equal",
771 static int get_int64(QEMUFile *f, void *pv, size_t size)
774 qemu_get_sbe64s(f, v);
778 static void put_int64(QEMUFile *f, void *pv, size_t size)
781 qemu_put_sbe64s(f, v);
784 const VMStateInfo vmstate_info_int64 = {
790 /* 8 bit unsigned int */
792 static int get_uint8(QEMUFile *f, void *pv, size_t size)
799 static void put_uint8(QEMUFile *f, void *pv, size_t size)
805 const VMStateInfo vmstate_info_uint8 = {
811 /* 16 bit unsigned int */
813 static int get_uint16(QEMUFile *f, void *pv, size_t size)
816 qemu_get_be16s(f, v);
820 static void put_uint16(QEMUFile *f, void *pv, size_t size)
823 qemu_put_be16s(f, v);
826 const VMStateInfo vmstate_info_uint16 = {
832 /* 32 bit unsigned int */
834 static int get_uint32(QEMUFile *f, void *pv, size_t size)
837 qemu_get_be32s(f, v);
841 static void put_uint32(QEMUFile *f, void *pv, size_t size)
844 qemu_put_be32s(f, v);
847 const VMStateInfo vmstate_info_uint32 = {
853 /* 64 bit unsigned int */
855 static int get_uint64(QEMUFile *f, void *pv, size_t size)
858 qemu_get_be64s(f, v);
862 static void put_uint64(QEMUFile *f, void *pv, size_t size)
865 qemu_put_be64s(f, v);
868 const VMStateInfo vmstate_info_uint64 = {
874 /* 8 bit int. See that the received value is the same than the one
877 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
888 const VMStateInfo vmstate_info_uint8_equal = {
889 .name = "uint8 equal",
890 .get = get_uint8_equal,
894 /* 16 bit unsigned int int. See that the received value is the same than the one
897 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
901 qemu_get_be16s(f, &v2);
908 const VMStateInfo vmstate_info_uint16_equal = {
909 .name = "uint16 equal",
910 .get = get_uint16_equal,
916 static int get_timer(QEMUFile *f, void *pv, size_t size)
919 qemu_get_timer(f, v);
923 static void put_timer(QEMUFile *f, void *pv, size_t size)
926 qemu_put_timer(f, v);
929 const VMStateInfo vmstate_info_timer = {
935 /* uint8_t buffers */
937 static int get_buffer(QEMUFile *f, void *pv, size_t size)
940 qemu_get_buffer(f, v, size);
944 static void put_buffer(QEMUFile *f, void *pv, size_t size)
947 qemu_put_buffer(f, v, size);
950 const VMStateInfo vmstate_info_buffer = {
956 /* unused buffers: space that was used for some fields that are
957 not usefull anymore */
959 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
965 block_len = MIN(sizeof(buf), size);
967 qemu_get_buffer(f, buf, block_len);
972 static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
974 static const uint8_t buf[1024];
978 block_len = MIN(sizeof(buf), size);
980 qemu_put_buffer(f, buf, block_len);
984 const VMStateInfo vmstate_info_unused_buffer = {
985 .name = "unused_buffer",
986 .get = get_unused_buffer,
987 .put = put_unused_buffer,
990 typedef struct SaveStateEntry {
991 QTAILQ_ENTRY(SaveStateEntry) entry;
996 SaveSetParamsHandler *set_params;
997 SaveLiveStateHandler *save_live_state;
998 SaveStateHandler *save_state;
999 LoadStateHandler *load_state;
1000 const VMStateDescription *vmsd;
1005 static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1006 QTAILQ_HEAD_INITIALIZER(savevm_handlers);
1007 static int global_section_id;
1009 static int calculate_new_instance_id(const char *idstr)
1012 int instance_id = 0;
1014 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1015 if (strcmp(idstr, se->idstr) == 0
1016 && instance_id <= se->instance_id) {
1017 instance_id = se->instance_id + 1;
1023 /* TODO: Individual devices generally have very little idea about the rest
1024 of the system, so instance_id should be removed/replaced.
1025 Meanwhile pass -1 as instance_id if you do not already have a clearly
1026 distinguishing id for all instances of your device class. */
1027 int register_savevm_live(const char *idstr,
1030 SaveSetParamsHandler *set_params,
1031 SaveLiveStateHandler *save_live_state,
1032 SaveStateHandler *save_state,
1033 LoadStateHandler *load_state,
1038 se = qemu_mallocz(sizeof(SaveStateEntry));
1039 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
1040 se->version_id = version_id;
1041 se->section_id = global_section_id++;
1042 se->set_params = set_params;
1043 se->save_live_state = save_live_state;
1044 se->save_state = save_state;
1045 se->load_state = load_state;
1046 se->opaque = opaque;
1049 if (instance_id == -1) {
1050 se->instance_id = calculate_new_instance_id(idstr);
1052 se->instance_id = instance_id;
1054 /* add at the end of list */
1055 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1059 int register_savevm(const char *idstr,
1062 SaveStateHandler *save_state,
1063 LoadStateHandler *load_state,
1066 return register_savevm_live(idstr, instance_id, version_id,
1067 NULL, NULL, save_state, load_state, opaque);
1070 void unregister_savevm(const char *idstr, void *opaque)
1072 SaveStateEntry *se, *new_se;
1074 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1075 if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) {
1076 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1082 int vmstate_register(int instance_id, const VMStateDescription *vmsd,
1087 se = qemu_mallocz(sizeof(SaveStateEntry));
1088 pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
1089 se->version_id = vmsd->version_id;
1090 se->section_id = global_section_id++;
1091 se->save_live_state = NULL;
1092 se->save_state = NULL;
1093 se->load_state = NULL;
1094 se->opaque = opaque;
1097 if (instance_id == -1) {
1098 se->instance_id = calculate_new_instance_id(vmsd->name);
1100 se->instance_id = instance_id;
1102 /* add at the end of list */
1103 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1107 void vmstate_unregister(const VMStateDescription *vmsd, void *opaque)
1109 SaveStateEntry *se, *new_se;
1111 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1112 if (se->vmsd == vmsd && se->opaque == opaque) {
1113 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1119 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1120 void *opaque, int version_id)
1122 VMStateField *field = vmsd->fields;
1124 if (version_id > vmsd->version_id) {
1127 if (version_id < vmsd->minimum_version_id_old) {
1130 if (version_id < vmsd->minimum_version_id) {
1131 return vmsd->load_state_old(f, opaque, version_id);
1133 if (vmsd->pre_load) {
1134 int ret = vmsd->pre_load(opaque);
1138 while(field->name) {
1139 if ((field->field_exists &&
1140 field->field_exists(opaque, version_id)) ||
1141 (!field->field_exists &&
1142 field->version_id <= version_id)) {
1143 void *base_addr = opaque + field->offset;
1144 int ret, i, n_elems = 1;
1145 int size = field->size;
1147 if (field->flags & VMS_VBUFFER) {
1148 size = *(int32_t *)(opaque+field->size_offset);
1149 if (field->flags & VMS_MULTIPLY) {
1150 size *= field->size;
1153 if (field->flags & VMS_ARRAY) {
1154 n_elems = field->num;
1155 } else if (field->flags & VMS_VARRAY_INT32) {
1156 n_elems = *(int32_t *)(opaque+field->num_offset);
1157 } else if (field->flags & VMS_VARRAY_UINT16) {
1158 n_elems = *(uint16_t *)(opaque+field->num_offset);
1160 if (field->flags & VMS_POINTER) {
1161 base_addr = *(void **)base_addr + field->start;
1163 for (i = 0; i < n_elems; i++) {
1164 void *addr = base_addr + size * i;
1166 if (field->flags & VMS_ARRAY_OF_POINTER) {
1167 addr = *(void **)addr;
1169 if (field->flags & VMS_STRUCT) {
1170 ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
1172 ret = field->info->get(f, addr, size);
1182 if (vmsd->post_load) {
1183 return vmsd->post_load(opaque, version_id);
1188 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
1191 VMStateField *field = vmsd->fields;
1193 if (vmsd->pre_save) {
1194 vmsd->pre_save(opaque);
1196 while(field->name) {
1197 if (!field->field_exists ||
1198 field->field_exists(opaque, vmsd->version_id)) {
1199 void *base_addr = opaque + field->offset;
1201 int size = field->size;
1203 if (field->flags & VMS_VBUFFER) {
1204 size = *(int32_t *)(opaque+field->size_offset);
1205 if (field->flags & VMS_MULTIPLY) {
1206 size *= field->size;
1209 if (field->flags & VMS_ARRAY) {
1210 n_elems = field->num;
1211 } else if (field->flags & VMS_VARRAY_INT32) {
1212 n_elems = *(int32_t *)(opaque+field->num_offset);
1213 } else if (field->flags & VMS_VARRAY_UINT16) {
1214 n_elems = *(uint16_t *)(opaque+field->num_offset);
1216 if (field->flags & VMS_POINTER) {
1217 base_addr = *(void **)base_addr + field->start;
1219 for (i = 0; i < n_elems; i++) {
1220 void *addr = base_addr + size * i;
1222 if (field->flags & VMS_ARRAY_OF_POINTER) {
1223 addr = *(void **)addr;
1225 if (field->flags & VMS_STRUCT) {
1226 vmstate_save_state(f, field->vmsd, addr);
1228 field->info->put(f, addr, size);
1234 if (vmsd->post_save) {
1235 vmsd->post_save(opaque);
1239 static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1241 if (!se->vmsd) { /* Old style */
1242 return se->load_state(f, se->opaque, version_id);
1244 return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
1247 static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
1249 if (!se->vmsd) { /* Old style */
1250 se->save_state(f, se->opaque);
1253 vmstate_save_state(f,se->vmsd, se->opaque);
1256 #define QEMU_VM_FILE_MAGIC 0x5145564d
1257 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1258 #define QEMU_VM_FILE_VERSION 0x00000003
1260 #define QEMU_VM_EOF 0x00
1261 #define QEMU_VM_SECTION_START 0x01
1262 #define QEMU_VM_SECTION_PART 0x02
1263 #define QEMU_VM_SECTION_END 0x03
1264 #define QEMU_VM_SECTION_FULL 0x04
1266 int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
1271 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1272 if(se->set_params == NULL) {
1275 se->set_params(blk_enable, shared, se->opaque);
1278 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1279 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1281 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1284 if (se->save_live_state == NULL)
1288 qemu_put_byte(f, QEMU_VM_SECTION_START);
1289 qemu_put_be32(f, se->section_id);
1292 len = strlen(se->idstr);
1293 qemu_put_byte(f, len);
1294 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1296 qemu_put_be32(f, se->instance_id);
1297 qemu_put_be32(f, se->version_id);
1299 se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
1302 if (qemu_file_has_error(f)) {
1303 qemu_savevm_state_cancel(mon, f);
1310 int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
1315 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1316 if (se->save_live_state == NULL)
1320 qemu_put_byte(f, QEMU_VM_SECTION_PART);
1321 qemu_put_be32(f, se->section_id);
1323 ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
1325 /* Do not proceed to the next vmstate before this one reported
1326 completion of the current stage. This serializes the migration
1327 and reduces the probability that a faster changing state is
1328 synchronized over and over again. */
1336 if (qemu_file_has_error(f)) {
1337 qemu_savevm_state_cancel(mon, f);
1344 int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
1348 cpu_synchronize_all_states();
1350 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1351 if (se->save_live_state == NULL)
1355 qemu_put_byte(f, QEMU_VM_SECTION_END);
1356 qemu_put_be32(f, se->section_id);
1358 se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
1361 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1364 if (se->save_state == NULL && se->vmsd == NULL)
1368 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1369 qemu_put_be32(f, se->section_id);
1372 len = strlen(se->idstr);
1373 qemu_put_byte(f, len);
1374 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1376 qemu_put_be32(f, se->instance_id);
1377 qemu_put_be32(f, se->version_id);
1379 vmstate_save(f, se);
1382 qemu_put_byte(f, QEMU_VM_EOF);
1384 if (qemu_file_has_error(f))
1390 void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
1394 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1395 if (se->save_live_state) {
1396 se->save_live_state(mon, f, -1, se->opaque);
1401 static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
1403 int saved_vm_running;
1406 saved_vm_running = vm_running;
1411 ret = qemu_savevm_state_begin(mon, f, 0, 0);
1416 ret = qemu_savevm_state_iterate(mon, f);
1421 ret = qemu_savevm_state_complete(mon, f);
1424 if (qemu_file_has_error(f))
1427 if (!ret && saved_vm_running)
1433 static SaveStateEntry *find_se(const char *idstr, int instance_id)
1437 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1438 if (!strcmp(se->idstr, idstr) &&
1439 instance_id == se->instance_id)
1445 typedef struct LoadStateEntry {
1446 QLIST_ENTRY(LoadStateEntry) entry;
1452 int qemu_loadvm_state(QEMUFile *f)
1454 QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1455 QLIST_HEAD_INITIALIZER(loadvm_handlers);
1456 LoadStateEntry *le, *new_le;
1457 uint8_t section_type;
1461 v = qemu_get_be32(f);
1462 if (v != QEMU_VM_FILE_MAGIC)
1465 v = qemu_get_be32(f);
1466 if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1467 fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1470 if (v != QEMU_VM_FILE_VERSION)
1473 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1474 uint32_t instance_id, version_id, section_id;
1479 switch (section_type) {
1480 case QEMU_VM_SECTION_START:
1481 case QEMU_VM_SECTION_FULL:
1482 /* Read section start */
1483 section_id = qemu_get_be32(f);
1484 len = qemu_get_byte(f);
1485 qemu_get_buffer(f, (uint8_t *)idstr, len);
1487 instance_id = qemu_get_be32(f);
1488 version_id = qemu_get_be32(f);
1490 /* Find savevm section */
1491 se = find_se(idstr, instance_id);
1493 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
1498 /* Validate version */
1499 if (version_id > se->version_id) {
1500 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
1501 version_id, idstr, se->version_id);
1507 le = qemu_mallocz(sizeof(*le));
1510 le->section_id = section_id;
1511 le->version_id = version_id;
1512 QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
1514 ret = vmstate_load(f, le->se, le->version_id);
1516 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1517 instance_id, idstr);
1521 case QEMU_VM_SECTION_PART:
1522 case QEMU_VM_SECTION_END:
1523 section_id = qemu_get_be32(f);
1525 QLIST_FOREACH(le, &loadvm_handlers, entry) {
1526 if (le->section_id == section_id) {
1531 fprintf(stderr, "Unknown savevm section %d\n", section_id);
1536 ret = vmstate_load(f, le->se, le->version_id);
1538 fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
1544 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1550 cpu_synchronize_all_post_init();
1555 QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
1556 QLIST_REMOVE(le, entry);
1560 if (qemu_file_has_error(f))
1566 /* device can contain snapshots */
1567 static int bdrv_can_snapshot(BlockDriverState *bs)
1570 !bdrv_is_removable(bs) &&
1571 !bdrv_is_read_only(bs));
1574 /* device must be snapshots in order to have a reliable snapshot */
1575 static int bdrv_has_snapshot(BlockDriverState *bs)
1578 !bdrv_is_removable(bs) &&
1579 !bdrv_is_read_only(bs));
1582 static BlockDriverState *get_bs_snapshots(void)
1584 BlockDriverState *bs;
1588 return bs_snapshots;
1589 QTAILQ_FOREACH(dinfo, &drives, next) {
1591 if (bdrv_can_snapshot(bs))
1600 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1603 QEMUSnapshotInfo *sn_tab, *sn;
1607 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1610 for(i = 0; i < nb_sns; i++) {
1612 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1623 * Deletes snapshots of a given name in all opened images.
1625 static int del_existing_snapshots(Monitor *mon, const char *name)
1627 BlockDriverState *bs;
1629 QEMUSnapshotInfo sn1, *snapshot = &sn1;
1632 QTAILQ_FOREACH(dinfo, &drives, next) {
1634 if (bdrv_can_snapshot(bs) &&
1635 bdrv_snapshot_find(bs, snapshot, name) >= 0)
1637 ret = bdrv_snapshot_delete(bs, name);
1640 "Error while deleting snapshot on '%s'\n",
1641 bdrv_get_device_name(bs));
1650 void do_savevm(Monitor *mon, const QDict *qdict)
1653 BlockDriverState *bs, *bs1;
1654 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1657 int saved_vm_running;
1658 uint32_t vm_state_size;
1664 const char *name = qdict_get_try_str(qdict, "name");
1666 bs = get_bs_snapshots();
1668 monitor_printf(mon, "No block device can accept snapshots\n");
1672 /* ??? Should this occur after vm_stop? */
1675 saved_vm_running = vm_running;
1678 memset(sn, 0, sizeof(*sn));
1680 ret = bdrv_snapshot_find(bs, old_sn, name);
1682 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1683 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1685 pstrcpy(sn->name, sizeof(sn->name), name);
1689 /* fill auxiliary fields */
1692 sn->date_sec = tb.time;
1693 sn->date_nsec = tb.millitm * 1000000;
1695 gettimeofday(&tv, NULL);
1696 sn->date_sec = tv.tv_sec;
1697 sn->date_nsec = tv.tv_usec * 1000;
1699 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1701 /* Delete old snapshots of the same name */
1702 if (name && del_existing_snapshots(mon, name) < 0) {
1706 /* save the VM state */
1707 f = qemu_fopen_bdrv(bs, 1);
1709 monitor_printf(mon, "Could not open VM state file\n");
1712 ret = qemu_savevm_state(mon, f);
1713 vm_state_size = qemu_ftell(f);
1716 monitor_printf(mon, "Error %d while writing VM\n", ret);
1720 /* create the snapshots */
1722 QTAILQ_FOREACH(dinfo, &drives, next) {
1724 if (bdrv_has_snapshot(bs1)) {
1725 /* Write VM state size only to the image that contains the state */
1726 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1727 ret = bdrv_snapshot_create(bs1, sn);
1729 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1730 bdrv_get_device_name(bs1));
1736 if (saved_vm_running)
1740 int load_vmstate(const char *name)
1743 BlockDriverState *bs, *bs1;
1744 QEMUSnapshotInfo sn;
1748 bs = get_bs_snapshots();
1750 error_report("No block device supports snapshots");
1754 /* Flush all IO requests so they don't interfere with the new state. */
1757 QTAILQ_FOREACH(dinfo, &drives, next) {
1759 if (bdrv_has_snapshot(bs1)) {
1760 ret = bdrv_snapshot_goto(bs1, name);
1764 error_report("%sSnapshots not supported on device '%s'",
1765 bs != bs1 ? "Warning: " : "",
1766 bdrv_get_device_name(bs1));
1769 error_report("%sCould not find snapshot '%s' on device '%s'",
1770 bs != bs1 ? "Warning: " : "",
1771 name, bdrv_get_device_name(bs1));
1774 error_report("%sError %d while activating snapshot on '%s'",
1775 bs != bs1 ? "Warning: " : "",
1776 ret, bdrv_get_device_name(bs1));
1779 /* fatal on snapshot block device */
1786 /* Don't even try to load empty VM states */
1787 ret = bdrv_snapshot_find(bs, &sn, name);
1788 if ((ret >= 0) && (sn.vm_state_size == 0))
1791 /* restore the VM state */
1792 f = qemu_fopen_bdrv(bs, 0);
1794 error_report("Could not open VM state file");
1797 ret = qemu_loadvm_state(f);
1800 error_report("Error %d while loading VM state", ret);
1806 void do_delvm(Monitor *mon, const QDict *qdict)
1809 BlockDriverState *bs, *bs1;
1811 const char *name = qdict_get_str(qdict, "name");
1813 bs = get_bs_snapshots();
1815 monitor_printf(mon, "No block device supports snapshots\n");
1819 QTAILQ_FOREACH(dinfo, &drives, next) {
1821 if (bdrv_has_snapshot(bs1)) {
1822 ret = bdrv_snapshot_delete(bs1, name);
1824 if (ret == -ENOTSUP)
1826 "Snapshots not supported on device '%s'\n",
1827 bdrv_get_device_name(bs1));
1829 monitor_printf(mon, "Error %d while deleting snapshot on "
1830 "'%s'\n", ret, bdrv_get_device_name(bs1));
1836 void do_info_snapshots(Monitor *mon)
1839 BlockDriverState *bs, *bs1;
1840 QEMUSnapshotInfo *sn_tab, *sn;
1844 bs = get_bs_snapshots();
1846 monitor_printf(mon, "No available block device supports snapshots\n");
1849 monitor_printf(mon, "Snapshot devices:");
1850 QTAILQ_FOREACH(dinfo, &drives, next) {
1852 if (bdrv_has_snapshot(bs1)) {
1854 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1857 monitor_printf(mon, "\n");
1859 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1861 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1864 monitor_printf(mon, "Snapshot list (from %s):\n",
1865 bdrv_get_device_name(bs));
1866 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1867 for(i = 0; i < nb_sns; i++) {
1869 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));