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_fopen_socket(int fd)
290 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
293 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL);
297 static int file_put_buffer(void *opaque, const uint8_t *buf,
298 int64_t pos, int size)
300 QEMUFileStdio *s = opaque;
301 fseek(s->stdio_file, pos, SEEK_SET);
302 fwrite(buf, 1, size, s->stdio_file);
306 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
308 QEMUFileStdio *s = opaque;
309 fseek(s->stdio_file, pos, SEEK_SET);
310 return fread(buf, 1, size, s->stdio_file);
313 QEMUFile *qemu_fopen(const char *filename, const char *mode)
318 (mode[0] != 'r' && mode[0] != 'w') ||
319 mode[1] != 'b' || mode[2] != 0) {
320 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
324 s = qemu_mallocz(sizeof(QEMUFileStdio));
326 s->stdio_file = fopen(filename, mode);
331 s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL);
333 s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL);
341 static int block_put_buffer(void *opaque, const uint8_t *buf,
342 int64_t pos, int size)
344 bdrv_save_vmstate(opaque, buf, pos, size);
348 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
350 return bdrv_load_vmstate(opaque, buf, pos, size);
353 static int bdrv_fclose(void *opaque)
358 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
361 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
362 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
365 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
366 QEMUFileGetBufferFunc *get_buffer,
367 QEMUFileCloseFunc *close,
368 QEMUFileRateLimit *rate_limit,
369 QEMUFileSetRateLimit *set_rate_limit)
373 f = qemu_mallocz(sizeof(QEMUFile));
376 f->put_buffer = put_buffer;
377 f->get_buffer = get_buffer;
379 f->rate_limit = rate_limit;
380 f->set_rate_limit = set_rate_limit;
386 int qemu_file_has_error(QEMUFile *f)
391 void qemu_file_set_error(QEMUFile *f)
396 void qemu_fflush(QEMUFile *f)
401 if (f->is_write && f->buf_index > 0) {
404 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
406 f->buf_offset += f->buf_index;
413 static void qemu_fill_buffer(QEMUFile *f)
423 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
427 f->buf_offset += len;
428 } else if (len != -EAGAIN)
432 int qemu_fclose(QEMUFile *f)
437 ret = f->close(f->opaque);
442 void qemu_file_put_notify(QEMUFile *f)
444 f->put_buffer(f->opaque, NULL, 0, 0);
447 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
451 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
453 "Attempted to write to buffer while read buffer is not empty\n");
457 while (!f->has_error && size > 0) {
458 l = IO_BUF_SIZE - f->buf_index;
461 memcpy(f->buf + f->buf_index, buf, l);
466 if (f->buf_index >= IO_BUF_SIZE)
471 void qemu_put_byte(QEMUFile *f, int v)
473 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
475 "Attempted to write to buffer while read buffer is not empty\n");
479 f->buf[f->buf_index++] = v;
481 if (f->buf_index >= IO_BUF_SIZE)
485 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
494 l = f->buf_size - f->buf_index;
497 l = f->buf_size - f->buf_index;
503 memcpy(buf, f->buf + f->buf_index, l);
511 int qemu_get_byte(QEMUFile *f)
516 if (f->buf_index >= f->buf_size) {
518 if (f->buf_index >= f->buf_size)
521 return f->buf[f->buf_index++];
524 int64_t qemu_ftell(QEMUFile *f)
526 return f->buf_offset - f->buf_size + f->buf_index;
529 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
531 if (whence == SEEK_SET) {
533 } else if (whence == SEEK_CUR) {
534 pos += qemu_ftell(f);
536 /* SEEK_END not supported */
550 int qemu_file_rate_limit(QEMUFile *f)
553 return f->rate_limit(f->opaque);
558 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
560 /* any failed or completed migration keeps its state to allow probing of
561 * migration data, but has no associated file anymore */
562 if (f && f->set_rate_limit)
563 return f->set_rate_limit(f->opaque, new_rate);
568 void qemu_put_be16(QEMUFile *f, unsigned int v)
570 qemu_put_byte(f, v >> 8);
574 void qemu_put_be32(QEMUFile *f, unsigned int v)
576 qemu_put_byte(f, v >> 24);
577 qemu_put_byte(f, v >> 16);
578 qemu_put_byte(f, v >> 8);
582 void qemu_put_be64(QEMUFile *f, uint64_t v)
584 qemu_put_be32(f, v >> 32);
588 unsigned int qemu_get_be16(QEMUFile *f)
591 v = qemu_get_byte(f) << 8;
592 v |= qemu_get_byte(f);
596 unsigned int qemu_get_be32(QEMUFile *f)
599 v = qemu_get_byte(f) << 24;
600 v |= qemu_get_byte(f) << 16;
601 v |= qemu_get_byte(f) << 8;
602 v |= qemu_get_byte(f);
606 uint64_t qemu_get_be64(QEMUFile *f)
609 v = (uint64_t)qemu_get_be32(f) << 32;
610 v |= qemu_get_be32(f);
614 typedef struct SaveStateEntry {
619 SaveLiveStateHandler *save_live_state;
620 SaveStateHandler *save_state;
621 LoadStateHandler *load_state;
623 struct SaveStateEntry *next;
626 static SaveStateEntry *first_se;
628 /* TODO: Individual devices generally have very little idea about the rest
629 of the system, so instance_id should be removed/replaced.
630 Meanwhile pass -1 as instance_id if you do not already have a clearly
631 distinguishing id for all instances of your device class. */
632 int register_savevm_live(const char *idstr,
635 SaveLiveStateHandler *save_live_state,
636 SaveStateHandler *save_state,
637 LoadStateHandler *load_state,
640 SaveStateEntry *se, **pse;
641 static int global_section_id;
643 se = qemu_malloc(sizeof(SaveStateEntry));
644 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
645 se->instance_id = (instance_id == -1) ? 0 : instance_id;
646 se->version_id = version_id;
647 se->section_id = global_section_id++;
648 se->save_live_state = save_live_state;
649 se->save_state = save_state;
650 se->load_state = load_state;
654 /* add at the end of list */
656 while (*pse != NULL) {
657 if (instance_id == -1
658 && strcmp(se->idstr, (*pse)->idstr) == 0
659 && se->instance_id <= (*pse)->instance_id)
660 se->instance_id = (*pse)->instance_id + 1;
667 int register_savevm(const char *idstr,
670 SaveStateHandler *save_state,
671 LoadStateHandler *load_state,
674 return register_savevm_live(idstr, instance_id, version_id,
675 NULL, save_state, load_state, opaque);
678 void unregister_savevm(const char *idstr, void *opaque)
680 SaveStateEntry **pse;
683 while (*pse != NULL) {
684 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
685 SaveStateEntry *next = (*pse)->next;
694 #define QEMU_VM_FILE_MAGIC 0x5145564d
695 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
696 #define QEMU_VM_FILE_VERSION 0x00000003
698 #define QEMU_VM_EOF 0x00
699 #define QEMU_VM_SECTION_START 0x01
700 #define QEMU_VM_SECTION_PART 0x02
701 #define QEMU_VM_SECTION_END 0x03
702 #define QEMU_VM_SECTION_FULL 0x04
704 int qemu_savevm_state_begin(QEMUFile *f)
708 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
709 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
711 for (se = first_se; se != NULL; se = se->next) {
714 if (se->save_live_state == NULL)
718 qemu_put_byte(f, QEMU_VM_SECTION_START);
719 qemu_put_be32(f, se->section_id);
722 len = strlen(se->idstr);
723 qemu_put_byte(f, len);
724 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
726 qemu_put_be32(f, se->instance_id);
727 qemu_put_be32(f, se->version_id);
729 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
732 if (qemu_file_has_error(f))
738 int qemu_savevm_state_iterate(QEMUFile *f)
743 for (se = first_se; se != NULL; se = se->next) {
744 if (se->save_live_state == NULL)
748 qemu_put_byte(f, QEMU_VM_SECTION_PART);
749 qemu_put_be32(f, se->section_id);
751 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
757 if (qemu_file_has_error(f))
763 int qemu_savevm_state_complete(QEMUFile *f)
767 for (se = first_se; se != NULL; se = se->next) {
768 if (se->save_live_state == NULL)
772 qemu_put_byte(f, QEMU_VM_SECTION_END);
773 qemu_put_be32(f, se->section_id);
775 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
778 for(se = first_se; se != NULL; se = se->next) {
781 if (se->save_state == NULL)
785 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
786 qemu_put_be32(f, se->section_id);
789 len = strlen(se->idstr);
790 qemu_put_byte(f, len);
791 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
793 qemu_put_be32(f, se->instance_id);
794 qemu_put_be32(f, se->version_id);
796 se->save_state(f, se->opaque);
799 qemu_put_byte(f, QEMU_VM_EOF);
801 if (qemu_file_has_error(f))
807 int qemu_savevm_state(QEMUFile *f)
809 int saved_vm_running;
812 saved_vm_running = vm_running;
817 ret = qemu_savevm_state_begin(f);
822 ret = qemu_savevm_state_iterate(f);
827 ret = qemu_savevm_state_complete(f);
830 if (qemu_file_has_error(f))
833 if (!ret && saved_vm_running)
839 static SaveStateEntry *find_se(const char *idstr, int instance_id)
843 for(se = first_se; se != NULL; se = se->next) {
844 if (!strcmp(se->idstr, idstr) &&
845 instance_id == se->instance_id)
851 typedef struct LoadStateEntry {
855 struct LoadStateEntry *next;
858 static int qemu_loadvm_state_v2(QEMUFile *f)
861 int len, ret, instance_id, record_len, version_id;
862 int64_t total_len, end_pos, cur_pos;
865 total_len = qemu_get_be64(f);
866 end_pos = total_len + qemu_ftell(f);
868 if (qemu_ftell(f) >= end_pos)
870 len = qemu_get_byte(f);
871 qemu_get_buffer(f, (uint8_t *)idstr, len);
873 instance_id = qemu_get_be32(f);
874 version_id = qemu_get_be32(f);
875 record_len = qemu_get_be32(f);
876 cur_pos = qemu_ftell(f);
877 se = find_se(idstr, instance_id);
879 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
882 ret = se->load_state(f, se->opaque, version_id);
884 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
889 /* always seek to exact end of record */
890 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
893 if (qemu_file_has_error(f))
899 int qemu_loadvm_state(QEMUFile *f)
901 LoadStateEntry *first_le = NULL;
902 uint8_t section_type;
906 v = qemu_get_be32(f);
907 if (v != QEMU_VM_FILE_MAGIC)
910 v = qemu_get_be32(f);
911 if (v == QEMU_VM_FILE_VERSION_COMPAT)
912 return qemu_loadvm_state_v2(f);
913 if (v != QEMU_VM_FILE_VERSION)
916 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
917 uint32_t instance_id, version_id, section_id;
923 switch (section_type) {
924 case QEMU_VM_SECTION_START:
925 case QEMU_VM_SECTION_FULL:
926 /* Read section start */
927 section_id = qemu_get_be32(f);
928 len = qemu_get_byte(f);
929 qemu_get_buffer(f, (uint8_t *)idstr, len);
931 instance_id = qemu_get_be32(f);
932 version_id = qemu_get_be32(f);
934 /* Find savevm section */
935 se = find_se(idstr, instance_id);
937 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
942 /* Validate version */
943 if (version_id > se->version_id) {
944 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
945 version_id, idstr, se->version_id);
951 le = qemu_mallocz(sizeof(*le));
954 le->section_id = section_id;
955 le->version_id = version_id;
959 le->se->load_state(f, le->se->opaque, le->version_id);
961 case QEMU_VM_SECTION_PART:
962 case QEMU_VM_SECTION_END:
963 section_id = qemu_get_be32(f);
965 for (le = first_le; le && le->section_id != section_id; le = le->next);
967 fprintf(stderr, "Unknown savevm section %d\n", section_id);
972 le->se->load_state(f, le->se->opaque, le->version_id);
975 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
985 LoadStateEntry *le = first_le;
986 first_le = first_le->next;
990 if (qemu_file_has_error(f))
996 /* device can contain snapshots */
997 static int bdrv_can_snapshot(BlockDriverState *bs)
1000 !bdrv_is_removable(bs) &&
1001 !bdrv_is_read_only(bs));
1004 /* device must be snapshots in order to have a reliable snapshot */
1005 static int bdrv_has_snapshot(BlockDriverState *bs)
1008 !bdrv_is_removable(bs) &&
1009 !bdrv_is_read_only(bs));
1012 static BlockDriverState *get_bs_snapshots(void)
1014 BlockDriverState *bs;
1018 return bs_snapshots;
1019 TAILQ_FOREACH(dinfo, &drives, next) {
1021 if (bdrv_can_snapshot(bs))
1030 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1033 QEMUSnapshotInfo *sn_tab, *sn;
1037 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1040 for(i = 0; i < nb_sns; i++) {
1042 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1052 void do_savevm(Monitor *mon, const char *name)
1055 BlockDriverState *bs, *bs1;
1056 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1057 int must_delete, ret;
1059 int saved_vm_running;
1060 uint32_t vm_state_size;
1067 bs = get_bs_snapshots();
1069 monitor_printf(mon, "No block device can accept snapshots\n");
1073 /* ??? Should this occur after vm_stop? */
1076 saved_vm_running = vm_running;
1081 ret = bdrv_snapshot_find(bs, old_sn, name);
1086 memset(sn, 0, sizeof(*sn));
1088 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1089 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1092 pstrcpy(sn->name, sizeof(sn->name), name);
1095 /* fill auxiliary fields */
1098 sn->date_sec = tb.time;
1099 sn->date_nsec = tb.millitm * 1000000;
1101 gettimeofday(&tv, NULL);
1102 sn->date_sec = tv.tv_sec;
1103 sn->date_nsec = tv.tv_usec * 1000;
1105 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1107 /* save the VM state */
1108 f = qemu_fopen_bdrv(bs, 1);
1110 monitor_printf(mon, "Could not open VM state file\n");
1113 ret = qemu_savevm_state(f);
1114 vm_state_size = qemu_ftell(f);
1117 monitor_printf(mon, "Error %d while writing VM\n", ret);
1121 /* create the snapshots */
1123 TAILQ_FOREACH(dinfo, &drives, next) {
1125 if (bdrv_has_snapshot(bs1)) {
1127 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1130 "Error while deleting snapshot on '%s'\n",
1131 bdrv_get_device_name(bs1));
1134 /* Write VM state size only to the image that contains the state */
1135 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1136 ret = bdrv_snapshot_create(bs1, sn);
1138 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1139 bdrv_get_device_name(bs1));
1145 if (saved_vm_running)
1149 void do_loadvm(Monitor *mon, const char *name)
1152 BlockDriverState *bs, *bs1;
1153 QEMUSnapshotInfo sn;
1156 int saved_vm_running;
1158 bs = get_bs_snapshots();
1160 monitor_printf(mon, "No block device supports snapshots\n");
1164 /* Flush all IO requests so they don't interfere with the new state. */
1167 saved_vm_running = vm_running;
1170 TAILQ_FOREACH(dinfo, &drives, next) {
1172 if (bdrv_has_snapshot(bs1)) {
1173 ret = bdrv_snapshot_goto(bs1, name);
1176 monitor_printf(mon, "Warning: ");
1180 "Snapshots not supported on device '%s'\n",
1181 bdrv_get_device_name(bs1));
1184 monitor_printf(mon, "Could not find snapshot '%s' on "
1186 name, bdrv_get_device_name(bs1));
1189 monitor_printf(mon, "Error %d while activating snapshot on"
1190 " '%s'\n", ret, bdrv_get_device_name(bs1));
1193 /* fatal on snapshot block device */
1200 /* Don't even try to load empty VM states */
1201 ret = bdrv_snapshot_find(bs, &sn, name);
1202 if ((ret >= 0) && (sn.vm_state_size == 0))
1205 /* restore the VM state */
1206 f = qemu_fopen_bdrv(bs, 0);
1208 monitor_printf(mon, "Could not open VM state file\n");
1211 ret = qemu_loadvm_state(f);
1214 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1217 if (saved_vm_running)
1221 void do_delvm(Monitor *mon, const char *name)
1224 BlockDriverState *bs, *bs1;
1227 bs = get_bs_snapshots();
1229 monitor_printf(mon, "No block device supports snapshots\n");
1233 TAILQ_FOREACH(dinfo, &drives, next) {
1235 if (bdrv_has_snapshot(bs1)) {
1236 ret = bdrv_snapshot_delete(bs1, name);
1238 if (ret == -ENOTSUP)
1240 "Snapshots not supported on device '%s'\n",
1241 bdrv_get_device_name(bs1));
1243 monitor_printf(mon, "Error %d while deleting snapshot on "
1244 "'%s'\n", ret, bdrv_get_device_name(bs1));
1250 void do_info_snapshots(Monitor *mon)
1253 BlockDriverState *bs, *bs1;
1254 QEMUSnapshotInfo *sn_tab, *sn;
1258 bs = get_bs_snapshots();
1260 monitor_printf(mon, "No available block device supports snapshots\n");
1263 monitor_printf(mon, "Snapshot devices:");
1264 TAILQ_FOREACH(dinfo, &drives, next) {
1266 if (bdrv_has_snapshot(bs1)) {
1268 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1271 monitor_printf(mon, "\n");
1273 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1275 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1278 monitor_printf(mon, "Snapshot list (from %s):\n",
1279 bdrv_get_device_name(bs));
1280 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1281 for(i = 0; i < nb_sns; i++) {
1283 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));