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 #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(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(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 = recv(s->fd, (void *)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 = qemu_mallocz(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 = qemu_mallocz(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 = qemu_mallocz(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 = qemu_mallocz(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 = qemu_mallocz(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_has_error(QEMUFile *f)
433 void qemu_file_set_error(QEMUFile *f)
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;
455 static void qemu_fill_buffer(QEMUFile *f)
465 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
469 f->buf_offset += len;
470 } else if (len != -EAGAIN)
474 int qemu_fclose(QEMUFile *f)
479 ret = f->close(f->opaque);
484 void qemu_file_put_notify(QEMUFile *f)
486 f->put_buffer(f->opaque, NULL, 0, 0);
489 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
493 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
495 "Attempted to write to buffer while read buffer is not empty\n");
499 while (!f->has_error && size > 0) {
500 l = IO_BUF_SIZE - f->buf_index;
503 memcpy(f->buf + f->buf_index, buf, l);
508 if (f->buf_index >= IO_BUF_SIZE)
513 void qemu_put_byte(QEMUFile *f, int v)
515 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
517 "Attempted to write to buffer while read buffer is not empty\n");
521 f->buf[f->buf_index++] = v;
523 if (f->buf_index >= IO_BUF_SIZE)
527 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
536 l = f->buf_size - f->buf_index;
539 l = f->buf_size - f->buf_index;
545 memcpy(buf, f->buf + f->buf_index, l);
553 int qemu_get_byte(QEMUFile *f)
558 if (f->buf_index >= f->buf_size) {
560 if (f->buf_index >= f->buf_size)
563 return f->buf[f->buf_index++];
566 int64_t qemu_ftell(QEMUFile *f)
568 return f->buf_offset - f->buf_size + f->buf_index;
571 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
573 if (whence == SEEK_SET) {
575 } else if (whence == SEEK_CUR) {
576 pos += qemu_ftell(f);
578 /* SEEK_END not supported */
592 int qemu_file_rate_limit(QEMUFile *f)
595 return f->rate_limit(f->opaque);
600 size_t qemu_file_get_rate_limit(QEMUFile *f)
602 if (f->get_rate_limit)
603 return f->get_rate_limit(f->opaque);
608 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
610 /* any failed or completed migration keeps its state to allow probing of
611 * migration data, but has no associated file anymore */
612 if (f && f->set_rate_limit)
613 return f->set_rate_limit(f->opaque, new_rate);
618 void qemu_put_be16(QEMUFile *f, unsigned int v)
620 qemu_put_byte(f, v >> 8);
624 void qemu_put_be32(QEMUFile *f, unsigned int v)
626 qemu_put_byte(f, v >> 24);
627 qemu_put_byte(f, v >> 16);
628 qemu_put_byte(f, v >> 8);
632 void qemu_put_be64(QEMUFile *f, uint64_t v)
634 qemu_put_be32(f, v >> 32);
638 unsigned int qemu_get_be16(QEMUFile *f)
641 v = qemu_get_byte(f) << 8;
642 v |= qemu_get_byte(f);
646 unsigned int qemu_get_be32(QEMUFile *f)
649 v = qemu_get_byte(f) << 24;
650 v |= qemu_get_byte(f) << 16;
651 v |= qemu_get_byte(f) << 8;
652 v |= qemu_get_byte(f);
656 uint64_t qemu_get_be64(QEMUFile *f)
659 v = (uint64_t)qemu_get_be32(f) << 32;
660 v |= qemu_get_be32(f);
666 static int get_int8(QEMUFile *f, void *pv, size_t size)
673 static void put_int8(QEMUFile *f, void *pv, size_t size)
679 const VMStateInfo vmstate_info_int8 = {
687 static int get_int16(QEMUFile *f, void *pv, size_t size)
690 qemu_get_sbe16s(f, v);
694 static void put_int16(QEMUFile *f, void *pv, size_t size)
697 qemu_put_sbe16s(f, v);
700 const VMStateInfo vmstate_info_int16 = {
708 static int get_int32(QEMUFile *f, void *pv, size_t size)
711 qemu_get_sbe32s(f, v);
715 static void put_int32(QEMUFile *f, void *pv, size_t size)
718 qemu_put_sbe32s(f, v);
721 const VMStateInfo vmstate_info_int32 = {
727 /* 32 bit int. See that the received value is the same than the one
730 static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
734 qemu_get_sbe32s(f, &v2);
741 const VMStateInfo vmstate_info_int32_equal = {
742 .name = "int32 equal",
743 .get = get_int32_equal,
747 /* 32 bit int. See that the received value is the less or the same
748 than the one in the field */
750 static int get_int32_le(QEMUFile *f, void *pv, size_t size)
754 qemu_get_sbe32s(f, &new);
761 const VMStateInfo vmstate_info_int32_le = {
762 .name = "int32 equal",
769 static int get_int64(QEMUFile *f, void *pv, size_t size)
772 qemu_get_sbe64s(f, v);
776 static void put_int64(QEMUFile *f, void *pv, size_t size)
779 qemu_put_sbe64s(f, v);
782 const VMStateInfo vmstate_info_int64 = {
788 /* 8 bit unsigned int */
790 static int get_uint8(QEMUFile *f, void *pv, size_t size)
797 static void put_uint8(QEMUFile *f, void *pv, size_t size)
803 const VMStateInfo vmstate_info_uint8 = {
809 /* 16 bit unsigned int */
811 static int get_uint16(QEMUFile *f, void *pv, size_t size)
814 qemu_get_be16s(f, v);
818 static void put_uint16(QEMUFile *f, void *pv, size_t size)
821 qemu_put_be16s(f, v);
824 const VMStateInfo vmstate_info_uint16 = {
830 /* 32 bit unsigned int */
832 static int get_uint32(QEMUFile *f, void *pv, size_t size)
835 qemu_get_be32s(f, v);
839 static void put_uint32(QEMUFile *f, void *pv, size_t size)
842 qemu_put_be32s(f, v);
845 const VMStateInfo vmstate_info_uint32 = {
851 /* 64 bit unsigned int */
853 static int get_uint64(QEMUFile *f, void *pv, size_t size)
856 qemu_get_be64s(f, v);
860 static void put_uint64(QEMUFile *f, void *pv, size_t size)
863 qemu_put_be64s(f, v);
866 const VMStateInfo vmstate_info_uint64 = {
872 /* 8 bit int. See that the received value is the same than the one
875 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
886 const VMStateInfo vmstate_info_uint8_equal = {
887 .name = "uint8 equal",
888 .get = get_uint8_equal,
892 /* 16 bit unsigned int int. See that the received value is the same than the one
895 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
899 qemu_get_be16s(f, &v2);
906 const VMStateInfo vmstate_info_uint16_equal = {
907 .name = "uint16 equal",
908 .get = get_uint16_equal,
914 static int get_timer(QEMUFile *f, void *pv, size_t size)
917 qemu_get_timer(f, v);
921 static void put_timer(QEMUFile *f, void *pv, size_t size)
924 qemu_put_timer(f, v);
927 const VMStateInfo vmstate_info_timer = {
933 /* uint8_t buffers */
935 static int get_buffer(QEMUFile *f, void *pv, size_t size)
938 qemu_get_buffer(f, v, size);
942 static void put_buffer(QEMUFile *f, void *pv, size_t size)
945 qemu_put_buffer(f, v, size);
948 const VMStateInfo vmstate_info_buffer = {
954 /* unused buffers: space that was used for some fields that are
955 not usefull anymore */
957 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
963 block_len = MIN(sizeof(buf), size);
965 qemu_get_buffer(f, buf, block_len);
970 static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
972 static const uint8_t buf[1024];
976 block_len = MIN(sizeof(buf), size);
978 qemu_put_buffer(f, buf, block_len);
982 const VMStateInfo vmstate_info_unused_buffer = {
983 .name = "unused_buffer",
984 .get = get_unused_buffer,
985 .put = put_unused_buffer,
988 typedef struct SaveStateEntry {
989 QTAILQ_ENTRY(SaveStateEntry) entry;
995 SaveSetParamsHandler *set_params;
996 SaveLiveStateHandler *save_live_state;
997 SaveStateHandler *save_state;
998 LoadStateHandler *load_state;
999 const VMStateDescription *vmsd;
1004 static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1005 QTAILQ_HEAD_INITIALIZER(savevm_handlers);
1006 static int global_section_id;
1008 static int calculate_new_instance_id(const char *idstr)
1011 int instance_id = 0;
1013 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1014 if (strcmp(idstr, se->idstr) == 0
1015 && instance_id <= se->instance_id) {
1016 instance_id = se->instance_id + 1;
1022 /* TODO: Individual devices generally have very little idea about the rest
1023 of the system, so instance_id should be removed/replaced.
1024 Meanwhile pass -1 as instance_id if you do not already have a clearly
1025 distinguishing id for all instances of your device class. */
1026 int register_savevm_live(const char *idstr,
1029 SaveSetParamsHandler *set_params,
1030 SaveLiveStateHandler *save_live_state,
1031 SaveStateHandler *save_state,
1032 LoadStateHandler *load_state,
1037 se = qemu_mallocz(sizeof(SaveStateEntry));
1038 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
1039 se->version_id = version_id;
1040 se->section_id = global_section_id++;
1041 se->set_params = set_params;
1042 se->save_live_state = save_live_state;
1043 se->save_state = save_state;
1044 se->load_state = load_state;
1045 se->opaque = opaque;
1048 if (instance_id == -1) {
1049 se->instance_id = calculate_new_instance_id(idstr);
1051 se->instance_id = instance_id;
1053 /* add at the end of list */
1054 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1058 int register_savevm(const char *idstr,
1061 SaveStateHandler *save_state,
1062 LoadStateHandler *load_state,
1065 return register_savevm_live(idstr, instance_id, version_id,
1066 NULL, NULL, save_state, load_state, opaque);
1069 void unregister_savevm(const char *idstr, void *opaque)
1071 SaveStateEntry *se, *new_se;
1073 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1074 if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) {
1075 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1081 int vmstate_register_with_alias_id(int instance_id,
1082 const VMStateDescription *vmsd,
1083 void *opaque, int alias_id,
1084 int required_for_version)
1088 /* If this triggers, alias support can be dropped for the vmsd. */
1089 assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
1091 se = qemu_mallocz(sizeof(SaveStateEntry));
1092 pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
1093 se->version_id = vmsd->version_id;
1094 se->section_id = global_section_id++;
1095 se->save_live_state = NULL;
1096 se->save_state = NULL;
1097 se->load_state = NULL;
1098 se->opaque = opaque;
1100 se->alias_id = alias_id;
1102 if (instance_id == -1) {
1103 se->instance_id = calculate_new_instance_id(vmsd->name);
1105 se->instance_id = instance_id;
1107 /* add at the end of list */
1108 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1112 int vmstate_register(int instance_id, const VMStateDescription *vmsd,
1115 return vmstate_register_with_alias_id(instance_id, vmsd, opaque, -1, 0);
1118 void vmstate_unregister(const VMStateDescription *vmsd, void *opaque)
1120 SaveStateEntry *se, *new_se;
1122 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1123 if (se->vmsd == vmsd && se->opaque == opaque) {
1124 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1130 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1131 void *opaque, int version_id)
1133 VMStateField *field = vmsd->fields;
1135 if (version_id > vmsd->version_id) {
1138 if (version_id < vmsd->minimum_version_id_old) {
1141 if (version_id < vmsd->minimum_version_id) {
1142 return vmsd->load_state_old(f, opaque, version_id);
1144 if (vmsd->pre_load) {
1145 int ret = vmsd->pre_load(opaque);
1149 while(field->name) {
1150 if ((field->field_exists &&
1151 field->field_exists(opaque, version_id)) ||
1152 (!field->field_exists &&
1153 field->version_id <= version_id)) {
1154 void *base_addr = opaque + field->offset;
1155 int ret, i, n_elems = 1;
1156 int size = field->size;
1158 if (field->flags & VMS_VBUFFER) {
1159 size = *(int32_t *)(opaque+field->size_offset);
1160 if (field->flags & VMS_MULTIPLY) {
1161 size *= field->size;
1164 if (field->flags & VMS_ARRAY) {
1165 n_elems = field->num;
1166 } else if (field->flags & VMS_VARRAY_INT32) {
1167 n_elems = *(int32_t *)(opaque+field->num_offset);
1168 } else if (field->flags & VMS_VARRAY_UINT16) {
1169 n_elems = *(uint16_t *)(opaque+field->num_offset);
1171 if (field->flags & VMS_POINTER) {
1172 base_addr = *(void **)base_addr + field->start;
1174 for (i = 0; i < n_elems; i++) {
1175 void *addr = base_addr + size * i;
1177 if (field->flags & VMS_ARRAY_OF_POINTER) {
1178 addr = *(void **)addr;
1180 if (field->flags & VMS_STRUCT) {
1181 ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
1183 ret = field->info->get(f, addr, size);
1193 if (vmsd->post_load) {
1194 return vmsd->post_load(opaque, version_id);
1199 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
1202 VMStateField *field = vmsd->fields;
1204 if (vmsd->pre_save) {
1205 vmsd->pre_save(opaque);
1207 while(field->name) {
1208 if (!field->field_exists ||
1209 field->field_exists(opaque, vmsd->version_id)) {
1210 void *base_addr = opaque + field->offset;
1212 int size = field->size;
1214 if (field->flags & VMS_VBUFFER) {
1215 size = *(int32_t *)(opaque+field->size_offset);
1216 if (field->flags & VMS_MULTIPLY) {
1217 size *= field->size;
1220 if (field->flags & VMS_ARRAY) {
1221 n_elems = field->num;
1222 } else if (field->flags & VMS_VARRAY_INT32) {
1223 n_elems = *(int32_t *)(opaque+field->num_offset);
1224 } else if (field->flags & VMS_VARRAY_UINT16) {
1225 n_elems = *(uint16_t *)(opaque+field->num_offset);
1227 if (field->flags & VMS_POINTER) {
1228 base_addr = *(void **)base_addr + field->start;
1230 for (i = 0; i < n_elems; i++) {
1231 void *addr = base_addr + size * i;
1233 if (field->flags & VMS_ARRAY_OF_POINTER) {
1234 addr = *(void **)addr;
1236 if (field->flags & VMS_STRUCT) {
1237 vmstate_save_state(f, field->vmsd, addr);
1239 field->info->put(f, addr, size);
1247 static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1249 if (!se->vmsd) { /* Old style */
1250 return se->load_state(f, se->opaque, version_id);
1252 return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
1255 static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
1257 if (!se->vmsd) { /* Old style */
1258 se->save_state(f, se->opaque);
1261 vmstate_save_state(f,se->vmsd, se->opaque);
1264 #define QEMU_VM_FILE_MAGIC 0x5145564d
1265 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1266 #define QEMU_VM_FILE_VERSION 0x00000003
1268 #define QEMU_VM_EOF 0x00
1269 #define QEMU_VM_SECTION_START 0x01
1270 #define QEMU_VM_SECTION_PART 0x02
1271 #define QEMU_VM_SECTION_END 0x03
1272 #define QEMU_VM_SECTION_FULL 0x04
1274 int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
1279 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1280 if(se->set_params == NULL) {
1283 se->set_params(blk_enable, shared, se->opaque);
1286 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1287 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1289 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1292 if (se->save_live_state == NULL)
1296 qemu_put_byte(f, QEMU_VM_SECTION_START);
1297 qemu_put_be32(f, se->section_id);
1300 len = strlen(se->idstr);
1301 qemu_put_byte(f, len);
1302 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1304 qemu_put_be32(f, se->instance_id);
1305 qemu_put_be32(f, se->version_id);
1307 se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
1310 if (qemu_file_has_error(f)) {
1311 qemu_savevm_state_cancel(mon, f);
1318 int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
1323 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1324 if (se->save_live_state == NULL)
1328 qemu_put_byte(f, QEMU_VM_SECTION_PART);
1329 qemu_put_be32(f, se->section_id);
1331 ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
1333 /* Do not proceed to the next vmstate before this one reported
1334 completion of the current stage. This serializes the migration
1335 and reduces the probability that a faster changing state is
1336 synchronized over and over again. */
1344 if (qemu_file_has_error(f)) {
1345 qemu_savevm_state_cancel(mon, f);
1352 int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
1356 cpu_synchronize_all_states();
1358 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1359 if (se->save_live_state == NULL)
1363 qemu_put_byte(f, QEMU_VM_SECTION_END);
1364 qemu_put_be32(f, se->section_id);
1366 se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
1369 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1372 if (se->save_state == NULL && se->vmsd == NULL)
1376 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1377 qemu_put_be32(f, se->section_id);
1380 len = strlen(se->idstr);
1381 qemu_put_byte(f, len);
1382 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1384 qemu_put_be32(f, se->instance_id);
1385 qemu_put_be32(f, se->version_id);
1387 vmstate_save(f, se);
1390 qemu_put_byte(f, QEMU_VM_EOF);
1392 if (qemu_file_has_error(f))
1398 void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
1402 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1403 if (se->save_live_state) {
1404 se->save_live_state(mon, f, -1, se->opaque);
1409 static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
1411 int saved_vm_running;
1414 saved_vm_running = vm_running;
1419 ret = qemu_savevm_state_begin(mon, f, 0, 0);
1424 ret = qemu_savevm_state_iterate(mon, f);
1429 ret = qemu_savevm_state_complete(mon, f);
1432 if (qemu_file_has_error(f))
1435 if (!ret && saved_vm_running)
1441 static SaveStateEntry *find_se(const char *idstr, int instance_id)
1445 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1446 if (!strcmp(se->idstr, idstr) &&
1447 (instance_id == se->instance_id ||
1448 instance_id == se->alias_id))
1454 typedef struct LoadStateEntry {
1455 QLIST_ENTRY(LoadStateEntry) entry;
1461 int qemu_loadvm_state(QEMUFile *f)
1463 QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1464 QLIST_HEAD_INITIALIZER(loadvm_handlers);
1465 LoadStateEntry *le, *new_le;
1466 uint8_t section_type;
1470 v = qemu_get_be32(f);
1471 if (v != QEMU_VM_FILE_MAGIC)
1474 v = qemu_get_be32(f);
1475 if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1476 fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1479 if (v != QEMU_VM_FILE_VERSION)
1482 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1483 uint32_t instance_id, version_id, section_id;
1488 switch (section_type) {
1489 case QEMU_VM_SECTION_START:
1490 case QEMU_VM_SECTION_FULL:
1491 /* Read section start */
1492 section_id = qemu_get_be32(f);
1493 len = qemu_get_byte(f);
1494 qemu_get_buffer(f, (uint8_t *)idstr, len);
1496 instance_id = qemu_get_be32(f);
1497 version_id = qemu_get_be32(f);
1499 /* Find savevm section */
1500 se = find_se(idstr, instance_id);
1502 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
1507 /* Validate version */
1508 if (version_id > se->version_id) {
1509 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
1510 version_id, idstr, se->version_id);
1516 le = qemu_mallocz(sizeof(*le));
1519 le->section_id = section_id;
1520 le->version_id = version_id;
1521 QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
1523 ret = vmstate_load(f, le->se, le->version_id);
1525 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1526 instance_id, idstr);
1530 case QEMU_VM_SECTION_PART:
1531 case QEMU_VM_SECTION_END:
1532 section_id = qemu_get_be32(f);
1534 QLIST_FOREACH(le, &loadvm_handlers, entry) {
1535 if (le->section_id == section_id) {
1540 fprintf(stderr, "Unknown savevm section %d\n", section_id);
1545 ret = vmstate_load(f, le->se, le->version_id);
1547 fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
1553 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1559 cpu_synchronize_all_post_init();
1564 QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
1565 QLIST_REMOVE(le, entry);
1569 if (qemu_file_has_error(f))
1575 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1578 QEMUSnapshotInfo *sn_tab, *sn;
1582 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1585 for(i = 0; i < nb_sns; i++) {
1587 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1598 * Deletes snapshots of a given name in all opened images.
1600 static int del_existing_snapshots(Monitor *mon, const char *name)
1602 BlockDriverState *bs;
1603 QEMUSnapshotInfo sn1, *snapshot = &sn1;
1607 while ((bs = bdrv_next(bs))) {
1608 if (bdrv_can_snapshot(bs) &&
1609 bdrv_snapshot_find(bs, snapshot, name) >= 0)
1611 ret = bdrv_snapshot_delete(bs, name);
1614 "Error while deleting snapshot on '%s'\n",
1615 bdrv_get_device_name(bs));
1624 void do_savevm(Monitor *mon, const QDict *qdict)
1626 BlockDriverState *bs, *bs1;
1627 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1630 int saved_vm_running;
1631 uint32_t vm_state_size;
1637 const char *name = qdict_get_try_str(qdict, "name");
1639 /* Verify if there is a device that doesn't support snapshots and is writable */
1641 while ((bs = bdrv_next(bs))) {
1643 if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
1647 if (!bdrv_can_snapshot(bs)) {
1648 monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
1649 bdrv_get_device_name(bs));
1654 bs = bdrv_snapshots();
1656 monitor_printf(mon, "No block device can accept snapshots\n");
1659 /* ??? Should this occur after vm_stop? */
1662 saved_vm_running = vm_running;
1665 memset(sn, 0, sizeof(*sn));
1667 ret = bdrv_snapshot_find(bs, old_sn, name);
1669 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1670 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1672 pstrcpy(sn->name, sizeof(sn->name), name);
1676 /* fill auxiliary fields */
1679 sn->date_sec = tb.time;
1680 sn->date_nsec = tb.millitm * 1000000;
1682 gettimeofday(&tv, NULL);
1683 sn->date_sec = tv.tv_sec;
1684 sn->date_nsec = tv.tv_usec * 1000;
1686 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1688 /* Delete old snapshots of the same name */
1689 if (name && del_existing_snapshots(mon, name) < 0) {
1693 /* save the VM state */
1694 f = qemu_fopen_bdrv(bs, 1);
1696 monitor_printf(mon, "Could not open VM state file\n");
1699 ret = qemu_savevm_state(mon, f);
1700 vm_state_size = qemu_ftell(f);
1703 monitor_printf(mon, "Error %d while writing VM\n", ret);
1707 /* create the snapshots */
1710 while ((bs1 = bdrv_next(bs1))) {
1711 if (bdrv_can_snapshot(bs1)) {
1712 /* Write VM state size only to the image that contains the state */
1713 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1714 ret = bdrv_snapshot_create(bs1, sn);
1716 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1717 bdrv_get_device_name(bs1));
1723 if (saved_vm_running)
1727 int load_vmstate(const char *name)
1729 BlockDriverState *bs, *bs1;
1730 QEMUSnapshotInfo sn;
1734 /* Verify if there is a device that doesn't support snapshots and is writable */
1736 while ((bs = bdrv_next(bs))) {
1738 if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
1742 if (!bdrv_can_snapshot(bs)) {
1743 error_report("Device '%s' is writable but does not support snapshots.",
1744 bdrv_get_device_name(bs));
1749 bs = bdrv_snapshots();
1751 error_report("No block device supports snapshots");
1755 /* Flush all IO requests so they don't interfere with the new state. */
1759 while ((bs1 = bdrv_next(bs1))) {
1760 if (bdrv_can_snapshot(bs1)) {
1761 ret = bdrv_snapshot_goto(bs1, name);
1765 error_report("%sSnapshots not supported on device '%s'",
1766 bs != bs1 ? "Warning: " : "",
1767 bdrv_get_device_name(bs1));
1770 error_report("%sCould not find snapshot '%s' on device '%s'",
1771 bs != bs1 ? "Warning: " : "",
1772 name, bdrv_get_device_name(bs1));
1775 error_report("%sError %d while activating snapshot on '%s'",
1776 bs != bs1 ? "Warning: " : "",
1777 ret, bdrv_get_device_name(bs1));
1780 /* fatal on snapshot block device */
1787 /* Don't even try to load empty VM states */
1788 ret = bdrv_snapshot_find(bs, &sn, name);
1789 if ((ret >= 0) && (sn.vm_state_size == 0))
1792 /* restore the VM state */
1793 f = qemu_fopen_bdrv(bs, 0);
1795 error_report("Could not open VM state file");
1798 ret = qemu_loadvm_state(f);
1801 error_report("Error %d while loading VM state", ret);
1807 void do_delvm(Monitor *mon, const QDict *qdict)
1809 BlockDriverState *bs, *bs1;
1811 const char *name = qdict_get_str(qdict, "name");
1813 bs = bdrv_snapshots();
1815 monitor_printf(mon, "No block device supports snapshots\n");
1820 while ((bs1 = bdrv_next(bs1))) {
1821 if (bdrv_can_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)
1838 BlockDriverState *bs, *bs1;
1839 QEMUSnapshotInfo *sn_tab, *sn;
1843 bs = bdrv_snapshots();
1845 monitor_printf(mon, "No available block device supports snapshots\n");
1848 monitor_printf(mon, "Snapshot devices:");
1850 while ((bs1 = bdrv_next(bs1))) {
1851 if (bdrv_can_snapshot(bs1)) {
1853 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1856 monitor_printf(mon, "\n");
1858 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1860 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1863 monitor_printf(mon, "Snapshot list (from %s):\n",
1864 bdrv_get_device_name(bs));
1865 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1866 for(i = 0; i < nb_sns; i++) {
1868 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));