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 #if defined(__NetBSD__)
46 #include <net/if_tap.h>
49 #include <linux/if_tun.h>
51 #include <arpa/inet.h>
54 #include <sys/select.h>
57 #if defined(__FreeBSD__) || defined(__DragonFly__)
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.h>
68 #include <linux/rtc.h>
76 #include <sys/timeb.h>
78 #define getopt_long_only getopt_long
79 #define memalign(align, size) malloc(size)
82 #include "qemu-common.h"
87 #include "qemu-timer.h"
88 #include "qemu-char.h"
90 #include "audio/audio.h"
91 #include "migration.h"
92 #include "qemu_socket.h"
94 /* point to the block driver where the snapshots are managed */
95 static BlockDriverState *bs_snapshots;
97 #define SELF_ANNOUNCE_ROUNDS 5
98 #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
99 //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
100 #define EXPERIMENTAL_MAGIC 0xf1f23f4f
102 static int announce_self_create(uint8_t *buf,
105 uint32_t magic = EXPERIMENTAL_MAGIC;
106 uint16_t proto = htons(ETH_P_EXPERIMENTAL);
108 /* FIXME: should we send a different packet (arp/rarp/ping)? */
111 memset(buf, 0xff, 6); /* h_dst */
112 memcpy(buf + 6, mac_addr, 6); /* h_src */
113 memcpy(buf + 12, &proto, 2); /* h_proto */
114 memcpy(buf + 14, &magic, 4); /* magic */
119 static void qemu_announce_self_once(void *opaque)
125 static int count = SELF_ANNOUNCE_ROUNDS;
126 QEMUTimer *timer = *(QEMUTimer **)opaque;
128 for (i = 0; i < MAX_NICS; i++) {
129 if (!nd_table[i].used)
131 len = announce_self_create(buf, nd_table[i].macaddr);
132 vlan = nd_table[i].vlan;
133 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
134 vc->receive(vc, buf, len);
138 qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100);
140 qemu_del_timer(timer);
141 qemu_free_timer(timer);
145 void qemu_announce_self(void)
147 static QEMUTimer *timer;
148 timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer);
149 qemu_announce_self_once(&timer);
152 /***********************************************************/
153 /* savevm/loadvm support */
155 #define IO_BUF_SIZE 32768
158 QEMUFilePutBufferFunc *put_buffer;
159 QEMUFileGetBufferFunc *get_buffer;
160 QEMUFileCloseFunc *close;
161 QEMUFileRateLimit *rate_limit;
162 QEMUFileSetRateLimit *set_rate_limit;
166 int64_t buf_offset; /* start of buffer when writing, end of buffer
169 int buf_size; /* 0 when writing */
170 uint8_t buf[IO_BUF_SIZE];
175 typedef struct QEMUFileStdio
181 typedef struct QEMUFileSocket
187 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
189 QEMUFileSocket *s = opaque;
193 len = recv(s->fd, (void *)buf, size, 0);
194 } while (len == -1 && socket_error() == EINTR);
197 len = -socket_error();
202 static int socket_close(void *opaque)
204 QEMUFileSocket *s = opaque;
209 static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
211 QEMUFileStdio *s = opaque;
212 return fwrite(buf, 1, size, s->stdio_file);
215 static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
217 QEMUFileStdio *s = opaque;
218 FILE *fp = s->stdio_file;
223 bytes = fread(buf, 1, size, fp);
224 } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
228 static int stdio_pclose(void *opaque)
230 QEMUFileStdio *s = opaque;
231 pclose(s->stdio_file);
236 static int stdio_fclose(void *opaque)
238 QEMUFileStdio *s = opaque;
239 fclose(s->stdio_file);
244 QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
248 if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
249 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
253 s = qemu_mallocz(sizeof(QEMUFileStdio));
255 s->stdio_file = stdio_file;
258 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL);
260 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL);
265 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
269 popen_file = popen(command, mode);
270 if(popen_file == NULL) {
274 return qemu_popen(popen_file, mode);
277 int qemu_stdio_fd(QEMUFile *f)
282 p = (QEMUFileStdio *)f->opaque;
283 fd = fileno(p->stdio_file);
288 QEMUFile *qemu_fdopen(int fd, const char *mode)
293 (mode[0] != 'r' && mode[0] != 'w') ||
294 mode[1] != 'b' || mode[2] != 0) {
295 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
299 s = qemu_mallocz(sizeof(QEMUFileStdio));
300 s->stdio_file = fdopen(fd, mode);
305 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL);
307 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL);
316 QEMUFile *qemu_fopen_socket(int fd)
318 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
321 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL);
325 static int file_put_buffer(void *opaque, const uint8_t *buf,
326 int64_t pos, int size)
328 QEMUFileStdio *s = opaque;
329 fseek(s->stdio_file, pos, SEEK_SET);
330 fwrite(buf, 1, size, s->stdio_file);
334 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
336 QEMUFileStdio *s = opaque;
337 fseek(s->stdio_file, pos, SEEK_SET);
338 return fread(buf, 1, size, s->stdio_file);
341 QEMUFile *qemu_fopen(const char *filename, const char *mode)
346 (mode[0] != 'r' && mode[0] != 'w') ||
347 mode[1] != 'b' || mode[2] != 0) {
348 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
352 s = qemu_mallocz(sizeof(QEMUFileStdio));
354 s->stdio_file = fopen(filename, mode);
359 s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL);
361 s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL);
369 static int block_put_buffer(void *opaque, const uint8_t *buf,
370 int64_t pos, int size)
372 bdrv_save_vmstate(opaque, buf, pos, size);
376 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
378 return bdrv_load_vmstate(opaque, buf, pos, size);
381 static int bdrv_fclose(void *opaque)
386 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
389 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
390 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
393 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
394 QEMUFileGetBufferFunc *get_buffer,
395 QEMUFileCloseFunc *close,
396 QEMUFileRateLimit *rate_limit,
397 QEMUFileSetRateLimit *set_rate_limit)
401 f = qemu_mallocz(sizeof(QEMUFile));
404 f->put_buffer = put_buffer;
405 f->get_buffer = get_buffer;
407 f->rate_limit = rate_limit;
408 f->set_rate_limit = set_rate_limit;
414 int qemu_file_has_error(QEMUFile *f)
419 void qemu_file_set_error(QEMUFile *f)
424 void qemu_fflush(QEMUFile *f)
429 if (f->is_write && f->buf_index > 0) {
432 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
434 f->buf_offset += f->buf_index;
441 static void qemu_fill_buffer(QEMUFile *f)
451 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
455 f->buf_offset += len;
456 } else if (len != -EAGAIN)
460 int qemu_fclose(QEMUFile *f)
465 ret = f->close(f->opaque);
470 void qemu_file_put_notify(QEMUFile *f)
472 f->put_buffer(f->opaque, NULL, 0, 0);
475 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
479 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
481 "Attempted to write to buffer while read buffer is not empty\n");
485 while (!f->has_error && size > 0) {
486 l = IO_BUF_SIZE - f->buf_index;
489 memcpy(f->buf + f->buf_index, buf, l);
494 if (f->buf_index >= IO_BUF_SIZE)
499 void qemu_put_byte(QEMUFile *f, int v)
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 f->buf[f->buf_index++] = v;
509 if (f->buf_index >= IO_BUF_SIZE)
513 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
522 l = f->buf_size - f->buf_index;
525 l = f->buf_size - f->buf_index;
531 memcpy(buf, f->buf + f->buf_index, l);
539 int qemu_get_byte(QEMUFile *f)
544 if (f->buf_index >= f->buf_size) {
546 if (f->buf_index >= f->buf_size)
549 return f->buf[f->buf_index++];
552 int64_t qemu_ftell(QEMUFile *f)
554 return f->buf_offset - f->buf_size + f->buf_index;
557 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
559 if (whence == SEEK_SET) {
561 } else if (whence == SEEK_CUR) {
562 pos += qemu_ftell(f);
564 /* SEEK_END not supported */
578 int qemu_file_rate_limit(QEMUFile *f)
581 return f->rate_limit(f->opaque);
586 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
588 /* any failed or completed migration keeps its state to allow probing of
589 * migration data, but has no associated file anymore */
590 if (f && f->set_rate_limit)
591 return f->set_rate_limit(f->opaque, new_rate);
596 void qemu_put_be16(QEMUFile *f, unsigned int v)
598 qemu_put_byte(f, v >> 8);
602 void qemu_put_be32(QEMUFile *f, unsigned int v)
604 qemu_put_byte(f, v >> 24);
605 qemu_put_byte(f, v >> 16);
606 qemu_put_byte(f, v >> 8);
610 void qemu_put_be64(QEMUFile *f, uint64_t v)
612 qemu_put_be32(f, v >> 32);
616 unsigned int qemu_get_be16(QEMUFile *f)
619 v = qemu_get_byte(f) << 8;
620 v |= qemu_get_byte(f);
624 unsigned int qemu_get_be32(QEMUFile *f)
627 v = qemu_get_byte(f) << 24;
628 v |= qemu_get_byte(f) << 16;
629 v |= qemu_get_byte(f) << 8;
630 v |= qemu_get_byte(f);
634 uint64_t qemu_get_be64(QEMUFile *f)
637 v = (uint64_t)qemu_get_be32(f) << 32;
638 v |= qemu_get_be32(f);
642 typedef struct SaveStateEntry {
647 SaveLiveStateHandler *save_live_state;
648 SaveStateHandler *save_state;
649 LoadStateHandler *load_state;
651 struct SaveStateEntry *next;
654 static SaveStateEntry *first_se;
656 /* TODO: Individual devices generally have very little idea about the rest
657 of the system, so instance_id should be removed/replaced.
658 Meanwhile pass -1 as instance_id if you do not already have a clearly
659 distinguishing id for all instances of your device class. */
660 int register_savevm_live(const char *idstr,
663 SaveLiveStateHandler *save_live_state,
664 SaveStateHandler *save_state,
665 LoadStateHandler *load_state,
668 SaveStateEntry *se, **pse;
669 static int global_section_id;
671 se = qemu_malloc(sizeof(SaveStateEntry));
672 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
673 se->instance_id = (instance_id == -1) ? 0 : instance_id;
674 se->version_id = version_id;
675 se->section_id = global_section_id++;
676 se->save_live_state = save_live_state;
677 se->save_state = save_state;
678 se->load_state = load_state;
682 /* add at the end of list */
684 while (*pse != NULL) {
685 if (instance_id == -1
686 && strcmp(se->idstr, (*pse)->idstr) == 0
687 && se->instance_id <= (*pse)->instance_id)
688 se->instance_id = (*pse)->instance_id + 1;
695 int register_savevm(const char *idstr,
698 SaveStateHandler *save_state,
699 LoadStateHandler *load_state,
702 return register_savevm_live(idstr, instance_id, version_id,
703 NULL, save_state, load_state, opaque);
706 void unregister_savevm(const char *idstr, void *opaque)
708 SaveStateEntry **pse;
711 while (*pse != NULL) {
712 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
713 SaveStateEntry *next = (*pse)->next;
722 #define QEMU_VM_FILE_MAGIC 0x5145564d
723 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
724 #define QEMU_VM_FILE_VERSION 0x00000003
726 #define QEMU_VM_EOF 0x00
727 #define QEMU_VM_SECTION_START 0x01
728 #define QEMU_VM_SECTION_PART 0x02
729 #define QEMU_VM_SECTION_END 0x03
730 #define QEMU_VM_SECTION_FULL 0x04
732 int qemu_savevm_state_begin(QEMUFile *f)
736 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
737 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
739 for (se = first_se; se != NULL; se = se->next) {
742 if (se->save_live_state == NULL)
746 qemu_put_byte(f, QEMU_VM_SECTION_START);
747 qemu_put_be32(f, se->section_id);
750 len = strlen(se->idstr);
751 qemu_put_byte(f, len);
752 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
754 qemu_put_be32(f, se->instance_id);
755 qemu_put_be32(f, se->version_id);
757 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
760 if (qemu_file_has_error(f))
766 int qemu_savevm_state_iterate(QEMUFile *f)
771 for (se = first_se; se != NULL; se = se->next) {
772 if (se->save_live_state == NULL)
776 qemu_put_byte(f, QEMU_VM_SECTION_PART);
777 qemu_put_be32(f, se->section_id);
779 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
785 if (qemu_file_has_error(f))
791 int qemu_savevm_state_complete(QEMUFile *f)
795 for (se = first_se; se != NULL; se = se->next) {
796 if (se->save_live_state == NULL)
800 qemu_put_byte(f, QEMU_VM_SECTION_END);
801 qemu_put_be32(f, se->section_id);
803 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
806 for(se = first_se; se != NULL; se = se->next) {
809 if (se->save_state == NULL)
813 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
814 qemu_put_be32(f, se->section_id);
817 len = strlen(se->idstr);
818 qemu_put_byte(f, len);
819 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
821 qemu_put_be32(f, se->instance_id);
822 qemu_put_be32(f, se->version_id);
824 se->save_state(f, se->opaque);
827 qemu_put_byte(f, QEMU_VM_EOF);
829 if (qemu_file_has_error(f))
835 int qemu_savevm_state(QEMUFile *f)
837 int saved_vm_running;
840 saved_vm_running = vm_running;
845 ret = qemu_savevm_state_begin(f);
850 ret = qemu_savevm_state_iterate(f);
855 ret = qemu_savevm_state_complete(f);
858 if (qemu_file_has_error(f))
861 if (!ret && saved_vm_running)
867 static SaveStateEntry *find_se(const char *idstr, int instance_id)
871 for(se = first_se; se != NULL; se = se->next) {
872 if (!strcmp(se->idstr, idstr) &&
873 instance_id == se->instance_id)
879 typedef struct LoadStateEntry {
883 struct LoadStateEntry *next;
886 static int qemu_loadvm_state_v2(QEMUFile *f)
889 int len, ret, instance_id, record_len, version_id;
890 int64_t total_len, end_pos, cur_pos;
893 total_len = qemu_get_be64(f);
894 end_pos = total_len + qemu_ftell(f);
896 if (qemu_ftell(f) >= end_pos)
898 len = qemu_get_byte(f);
899 qemu_get_buffer(f, (uint8_t *)idstr, len);
901 instance_id = qemu_get_be32(f);
902 version_id = qemu_get_be32(f);
903 record_len = qemu_get_be32(f);
904 cur_pos = qemu_ftell(f);
905 se = find_se(idstr, instance_id);
907 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
910 ret = se->load_state(f, se->opaque, version_id);
912 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
917 /* always seek to exact end of record */
918 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
921 if (qemu_file_has_error(f))
927 int qemu_loadvm_state(QEMUFile *f)
929 LoadStateEntry *first_le = NULL;
930 uint8_t section_type;
934 v = qemu_get_be32(f);
935 if (v != QEMU_VM_FILE_MAGIC)
938 v = qemu_get_be32(f);
939 if (v == QEMU_VM_FILE_VERSION_COMPAT)
940 return qemu_loadvm_state_v2(f);
941 if (v != QEMU_VM_FILE_VERSION)
944 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
945 uint32_t instance_id, version_id, section_id;
951 switch (section_type) {
952 case QEMU_VM_SECTION_START:
953 case QEMU_VM_SECTION_FULL:
954 /* Read section start */
955 section_id = qemu_get_be32(f);
956 len = qemu_get_byte(f);
957 qemu_get_buffer(f, (uint8_t *)idstr, len);
959 instance_id = qemu_get_be32(f);
960 version_id = qemu_get_be32(f);
962 /* Find savevm section */
963 se = find_se(idstr, instance_id);
965 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
970 /* Validate version */
971 if (version_id > se->version_id) {
972 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
973 version_id, idstr, se->version_id);
979 le = qemu_mallocz(sizeof(*le));
982 le->section_id = section_id;
983 le->version_id = version_id;
987 le->se->load_state(f, le->se->opaque, le->version_id);
989 case QEMU_VM_SECTION_PART:
990 case QEMU_VM_SECTION_END:
991 section_id = qemu_get_be32(f);
993 for (le = first_le; le && le->section_id != section_id; le = le->next);
995 fprintf(stderr, "Unknown savevm section %d\n", section_id);
1000 le->se->load_state(f, le->se->opaque, le->version_id);
1003 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1013 LoadStateEntry *le = first_le;
1014 first_le = first_le->next;
1018 if (qemu_file_has_error(f))
1024 /* device can contain snapshots */
1025 static int bdrv_can_snapshot(BlockDriverState *bs)
1028 !bdrv_is_removable(bs) &&
1029 !bdrv_is_read_only(bs));
1032 /* device must be snapshots in order to have a reliable snapshot */
1033 static int bdrv_has_snapshot(BlockDriverState *bs)
1036 !bdrv_is_removable(bs) &&
1037 !bdrv_is_read_only(bs));
1040 static BlockDriverState *get_bs_snapshots(void)
1042 BlockDriverState *bs;
1046 return bs_snapshots;
1047 TAILQ_FOREACH(dinfo, &drives, next) {
1049 if (bdrv_can_snapshot(bs))
1058 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1061 QEMUSnapshotInfo *sn_tab, *sn;
1065 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1068 for(i = 0; i < nb_sns; i++) {
1070 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1080 void do_savevm(Monitor *mon, const char *name)
1083 BlockDriverState *bs, *bs1;
1084 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1085 int must_delete, ret;
1087 int saved_vm_running;
1088 uint32_t vm_state_size;
1095 bs = get_bs_snapshots();
1097 monitor_printf(mon, "No block device can accept snapshots\n");
1101 /* ??? Should this occur after vm_stop? */
1104 saved_vm_running = vm_running;
1109 ret = bdrv_snapshot_find(bs, old_sn, name);
1114 memset(sn, 0, sizeof(*sn));
1116 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1117 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1120 pstrcpy(sn->name, sizeof(sn->name), name);
1123 /* fill auxiliary fields */
1126 sn->date_sec = tb.time;
1127 sn->date_nsec = tb.millitm * 1000000;
1129 gettimeofday(&tv, NULL);
1130 sn->date_sec = tv.tv_sec;
1131 sn->date_nsec = tv.tv_usec * 1000;
1133 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1135 /* save the VM state */
1136 f = qemu_fopen_bdrv(bs, 1);
1138 monitor_printf(mon, "Could not open VM state file\n");
1141 ret = qemu_savevm_state(f);
1142 vm_state_size = qemu_ftell(f);
1145 monitor_printf(mon, "Error %d while writing VM\n", ret);
1149 /* create the snapshots */
1151 TAILQ_FOREACH(dinfo, &drives, next) {
1153 if (bdrv_has_snapshot(bs1)) {
1155 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1158 "Error while deleting snapshot on '%s'\n",
1159 bdrv_get_device_name(bs1));
1162 /* Write VM state size only to the image that contains the state */
1163 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1164 ret = bdrv_snapshot_create(bs1, sn);
1166 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1167 bdrv_get_device_name(bs1));
1173 if (saved_vm_running)
1177 void do_loadvm(Monitor *mon, const char *name)
1180 BlockDriverState *bs, *bs1;
1181 QEMUSnapshotInfo sn;
1184 int saved_vm_running;
1186 bs = get_bs_snapshots();
1188 monitor_printf(mon, "No block device supports snapshots\n");
1192 /* Flush all IO requests so they don't interfere with the new state. */
1195 saved_vm_running = vm_running;
1198 TAILQ_FOREACH(dinfo, &drives, next) {
1200 if (bdrv_has_snapshot(bs1)) {
1201 ret = bdrv_snapshot_goto(bs1, name);
1204 monitor_printf(mon, "Warning: ");
1208 "Snapshots not supported on device '%s'\n",
1209 bdrv_get_device_name(bs1));
1212 monitor_printf(mon, "Could not find snapshot '%s' on "
1214 name, bdrv_get_device_name(bs1));
1217 monitor_printf(mon, "Error %d while activating snapshot on"
1218 " '%s'\n", ret, bdrv_get_device_name(bs1));
1221 /* fatal on snapshot block device */
1228 /* Don't even try to load empty VM states */
1229 ret = bdrv_snapshot_find(bs, &sn, name);
1230 if ((ret >= 0) && (sn.vm_state_size == 0))
1233 /* restore the VM state */
1234 f = qemu_fopen_bdrv(bs, 0);
1236 monitor_printf(mon, "Could not open VM state file\n");
1239 ret = qemu_loadvm_state(f);
1242 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1245 if (saved_vm_running)
1249 void do_delvm(Monitor *mon, const char *name)
1252 BlockDriverState *bs, *bs1;
1255 bs = get_bs_snapshots();
1257 monitor_printf(mon, "No block device supports snapshots\n");
1261 TAILQ_FOREACH(dinfo, &drives, next) {
1263 if (bdrv_has_snapshot(bs1)) {
1264 ret = bdrv_snapshot_delete(bs1, name);
1266 if (ret == -ENOTSUP)
1268 "Snapshots not supported on device '%s'\n",
1269 bdrv_get_device_name(bs1));
1271 monitor_printf(mon, "Error %d while deleting snapshot on "
1272 "'%s'\n", ret, bdrv_get_device_name(bs1));
1278 void do_info_snapshots(Monitor *mon)
1281 BlockDriverState *bs, *bs1;
1282 QEMUSnapshotInfo *sn_tab, *sn;
1286 bs = get_bs_snapshots();
1288 monitor_printf(mon, "No available block device supports snapshots\n");
1291 monitor_printf(mon, "Snapshot devices:");
1292 TAILQ_FOREACH(dinfo, &drives, next) {
1294 if (bdrv_has_snapshot(bs1)) {
1296 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1299 monitor_printf(mon, "\n");
1301 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1303 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1306 monitor_printf(mon, "Snapshot list (from %s):\n",
1307 bdrv_get_device_name(bs));
1308 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1309 for(i = 0; i < nb_sns; i++) {
1311 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));