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 HOST_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 QEMUFilePopen
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 popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
211 QEMUFilePopen *s = opaque;
212 return fwrite(buf, 1, size, s->popen_file);
215 static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
217 QEMUFilePopen *s = opaque;
218 FILE *fp = s->popen_file;
223 bytes = fread(buf, 1, size, fp);
224 } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
228 static int popen_close(void *opaque)
230 QEMUFilePopen *s = opaque;
231 pclose(s->popen_file);
236 QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
240 if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
241 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
245 s = qemu_mallocz(sizeof(QEMUFilePopen));
247 s->popen_file = popen_file;
250 s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL);
252 s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL);
257 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
261 popen_file = popen(command, mode);
262 if(popen_file == NULL) {
266 return qemu_popen(popen_file, mode);
269 int qemu_popen_fd(QEMUFile *f)
274 p = (QEMUFilePopen *)f->opaque;
275 fd = fileno(p->popen_file);
280 QEMUFile *qemu_fopen_socket(int fd)
282 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
285 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL);
289 typedef struct QEMUFileStdio
294 static int file_put_buffer(void *opaque, const uint8_t *buf,
295 int64_t pos, int size)
297 QEMUFileStdio *s = opaque;
298 fseek(s->outfile, pos, SEEK_SET);
299 fwrite(buf, 1, size, s->outfile);
303 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
305 QEMUFileStdio *s = opaque;
306 fseek(s->outfile, pos, SEEK_SET);
307 return fread(buf, 1, size, s->outfile);
310 static int file_close(void *opaque)
312 QEMUFileStdio *s = opaque;
318 QEMUFile *qemu_fopen(const char *filename, const char *mode)
322 s = qemu_mallocz(sizeof(QEMUFileStdio));
324 s->outfile = fopen(filename, mode);
328 if (!strcmp(mode, "wb"))
329 return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL, NULL);
330 else if (!strcmp(mode, "rb"))
331 return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL, NULL);
340 static int block_put_buffer(void *opaque, const uint8_t *buf,
341 int64_t pos, int size)
343 bdrv_save_vmstate(opaque, buf, pos, size);
347 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
349 return bdrv_load_vmstate(opaque, buf, pos, size);
352 static int bdrv_fclose(void *opaque)
357 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
360 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
361 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
364 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
365 QEMUFileGetBufferFunc *get_buffer,
366 QEMUFileCloseFunc *close,
367 QEMUFileRateLimit *rate_limit,
368 QEMUFileSetRateLimit *set_rate_limit)
372 f = qemu_mallocz(sizeof(QEMUFile));
375 f->put_buffer = put_buffer;
376 f->get_buffer = get_buffer;
378 f->rate_limit = rate_limit;
379 f->set_rate_limit = set_rate_limit;
385 int qemu_file_has_error(QEMUFile *f)
390 void qemu_file_set_error(QEMUFile *f)
395 void qemu_fflush(QEMUFile *f)
400 if (f->is_write && f->buf_index > 0) {
403 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
405 f->buf_offset += f->buf_index;
412 static void qemu_fill_buffer(QEMUFile *f)
422 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
426 f->buf_offset += len;
427 } else if (len != -EAGAIN)
431 int qemu_fclose(QEMUFile *f)
436 ret = f->close(f->opaque);
441 void qemu_file_put_notify(QEMUFile *f)
443 f->put_buffer(f->opaque, NULL, 0, 0);
446 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
450 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
452 "Attempted to write to buffer while read buffer is not empty\n");
456 while (!f->has_error && size > 0) {
457 l = IO_BUF_SIZE - f->buf_index;
460 memcpy(f->buf + f->buf_index, buf, l);
465 if (f->buf_index >= IO_BUF_SIZE)
470 void qemu_put_byte(QEMUFile *f, int v)
472 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
474 "Attempted to write to buffer while read buffer is not empty\n");
478 f->buf[f->buf_index++] = v;
480 if (f->buf_index >= IO_BUF_SIZE)
484 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
493 l = f->buf_size - f->buf_index;
496 l = f->buf_size - f->buf_index;
502 memcpy(buf, f->buf + f->buf_index, l);
510 int qemu_get_byte(QEMUFile *f)
515 if (f->buf_index >= f->buf_size) {
517 if (f->buf_index >= f->buf_size)
520 return f->buf[f->buf_index++];
523 int64_t qemu_ftell(QEMUFile *f)
525 return f->buf_offset - f->buf_size + f->buf_index;
528 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
530 if (whence == SEEK_SET) {
532 } else if (whence == SEEK_CUR) {
533 pos += qemu_ftell(f);
535 /* SEEK_END not supported */
549 int qemu_file_rate_limit(QEMUFile *f)
552 return f->rate_limit(f->opaque);
557 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
559 /* any failed or completed migration keeps its state to allow probing of
560 * migration data, but has no associated file anymore */
561 if (f && f->set_rate_limit)
562 return f->set_rate_limit(f->opaque, new_rate);
567 void qemu_put_be16(QEMUFile *f, unsigned int v)
569 qemu_put_byte(f, v >> 8);
573 void qemu_put_be32(QEMUFile *f, unsigned int v)
575 qemu_put_byte(f, v >> 24);
576 qemu_put_byte(f, v >> 16);
577 qemu_put_byte(f, v >> 8);
581 void qemu_put_be64(QEMUFile *f, uint64_t v)
583 qemu_put_be32(f, v >> 32);
587 unsigned int qemu_get_be16(QEMUFile *f)
590 v = qemu_get_byte(f) << 8;
591 v |= qemu_get_byte(f);
595 unsigned int qemu_get_be32(QEMUFile *f)
598 v = qemu_get_byte(f) << 24;
599 v |= qemu_get_byte(f) << 16;
600 v |= qemu_get_byte(f) << 8;
601 v |= qemu_get_byte(f);
605 uint64_t qemu_get_be64(QEMUFile *f)
608 v = (uint64_t)qemu_get_be32(f) << 32;
609 v |= qemu_get_be32(f);
613 typedef struct SaveStateEntry {
618 SaveLiveStateHandler *save_live_state;
619 SaveStateHandler *save_state;
620 LoadStateHandler *load_state;
622 struct SaveStateEntry *next;
625 static SaveStateEntry *first_se;
627 /* TODO: Individual devices generally have very little idea about the rest
628 of the system, so instance_id should be removed/replaced.
629 Meanwhile pass -1 as instance_id if you do not already have a clearly
630 distinguishing id for all instances of your device class. */
631 int register_savevm_live(const char *idstr,
634 SaveLiveStateHandler *save_live_state,
635 SaveStateHandler *save_state,
636 LoadStateHandler *load_state,
639 SaveStateEntry *se, **pse;
640 static int global_section_id;
642 se = qemu_malloc(sizeof(SaveStateEntry));
643 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
644 se->instance_id = (instance_id == -1) ? 0 : instance_id;
645 se->version_id = version_id;
646 se->section_id = global_section_id++;
647 se->save_live_state = save_live_state;
648 se->save_state = save_state;
649 se->load_state = load_state;
653 /* add at the end of list */
655 while (*pse != NULL) {
656 if (instance_id == -1
657 && strcmp(se->idstr, (*pse)->idstr) == 0
658 && se->instance_id <= (*pse)->instance_id)
659 se->instance_id = (*pse)->instance_id + 1;
666 int register_savevm(const char *idstr,
669 SaveStateHandler *save_state,
670 LoadStateHandler *load_state,
673 return register_savevm_live(idstr, instance_id, version_id,
674 NULL, save_state, load_state, opaque);
677 void unregister_savevm(const char *idstr, void *opaque)
679 SaveStateEntry **pse;
682 while (*pse != NULL) {
683 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
684 SaveStateEntry *next = (*pse)->next;
693 #define QEMU_VM_FILE_MAGIC 0x5145564d
694 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
695 #define QEMU_VM_FILE_VERSION 0x00000003
697 #define QEMU_VM_EOF 0x00
698 #define QEMU_VM_SECTION_START 0x01
699 #define QEMU_VM_SECTION_PART 0x02
700 #define QEMU_VM_SECTION_END 0x03
701 #define QEMU_VM_SECTION_FULL 0x04
703 int qemu_savevm_state_begin(QEMUFile *f)
707 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
708 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
710 for (se = first_se; se != NULL; se = se->next) {
713 if (se->save_live_state == NULL)
717 qemu_put_byte(f, QEMU_VM_SECTION_START);
718 qemu_put_be32(f, se->section_id);
721 len = strlen(se->idstr);
722 qemu_put_byte(f, len);
723 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
725 qemu_put_be32(f, se->instance_id);
726 qemu_put_be32(f, se->version_id);
728 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
731 if (qemu_file_has_error(f))
737 int qemu_savevm_state_iterate(QEMUFile *f)
742 for (se = first_se; se != NULL; se = se->next) {
743 if (se->save_live_state == NULL)
747 qemu_put_byte(f, QEMU_VM_SECTION_PART);
748 qemu_put_be32(f, se->section_id);
750 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
756 if (qemu_file_has_error(f))
762 int qemu_savevm_state_complete(QEMUFile *f)
766 for (se = first_se; se != NULL; se = se->next) {
767 if (se->save_live_state == NULL)
771 qemu_put_byte(f, QEMU_VM_SECTION_END);
772 qemu_put_be32(f, se->section_id);
774 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
777 for(se = first_se; se != NULL; se = se->next) {
780 if (se->save_state == NULL)
784 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
785 qemu_put_be32(f, se->section_id);
788 len = strlen(se->idstr);
789 qemu_put_byte(f, len);
790 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
792 qemu_put_be32(f, se->instance_id);
793 qemu_put_be32(f, se->version_id);
795 se->save_state(f, se->opaque);
798 qemu_put_byte(f, QEMU_VM_EOF);
800 if (qemu_file_has_error(f))
806 int qemu_savevm_state(QEMUFile *f)
808 int saved_vm_running;
811 saved_vm_running = vm_running;
816 ret = qemu_savevm_state_begin(f);
821 ret = qemu_savevm_state_iterate(f);
826 ret = qemu_savevm_state_complete(f);
829 if (qemu_file_has_error(f))
832 if (!ret && saved_vm_running)
838 static SaveStateEntry *find_se(const char *idstr, int instance_id)
842 for(se = first_se; se != NULL; se = se->next) {
843 if (!strcmp(se->idstr, idstr) &&
844 instance_id == se->instance_id)
850 typedef struct LoadStateEntry {
854 struct LoadStateEntry *next;
857 static int qemu_loadvm_state_v2(QEMUFile *f)
860 int len, ret, instance_id, record_len, version_id;
861 int64_t total_len, end_pos, cur_pos;
864 total_len = qemu_get_be64(f);
865 end_pos = total_len + qemu_ftell(f);
867 if (qemu_ftell(f) >= end_pos)
869 len = qemu_get_byte(f);
870 qemu_get_buffer(f, (uint8_t *)idstr, len);
872 instance_id = qemu_get_be32(f);
873 version_id = qemu_get_be32(f);
874 record_len = qemu_get_be32(f);
875 cur_pos = qemu_ftell(f);
876 se = find_se(idstr, instance_id);
878 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
881 ret = se->load_state(f, se->opaque, version_id);
883 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
888 /* always seek to exact end of record */
889 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
892 if (qemu_file_has_error(f))
898 int qemu_loadvm_state(QEMUFile *f)
900 LoadStateEntry *first_le = NULL;
901 uint8_t section_type;
905 v = qemu_get_be32(f);
906 if (v != QEMU_VM_FILE_MAGIC)
909 v = qemu_get_be32(f);
910 if (v == QEMU_VM_FILE_VERSION_COMPAT)
911 return qemu_loadvm_state_v2(f);
912 if (v != QEMU_VM_FILE_VERSION)
915 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
916 uint32_t instance_id, version_id, section_id;
922 switch (section_type) {
923 case QEMU_VM_SECTION_START:
924 case QEMU_VM_SECTION_FULL:
925 /* Read section start */
926 section_id = qemu_get_be32(f);
927 len = qemu_get_byte(f);
928 qemu_get_buffer(f, (uint8_t *)idstr, len);
930 instance_id = qemu_get_be32(f);
931 version_id = qemu_get_be32(f);
933 /* Find savevm section */
934 se = find_se(idstr, instance_id);
936 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
941 /* Validate version */
942 if (version_id > se->version_id) {
943 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
944 version_id, idstr, se->version_id);
950 le = qemu_mallocz(sizeof(*le));
953 le->section_id = section_id;
954 le->version_id = version_id;
958 le->se->load_state(f, le->se->opaque, le->version_id);
960 case QEMU_VM_SECTION_PART:
961 case QEMU_VM_SECTION_END:
962 section_id = qemu_get_be32(f);
964 for (le = first_le; le && le->section_id != section_id; le = le->next);
966 fprintf(stderr, "Unknown savevm section %d\n", section_id);
971 le->se->load_state(f, le->se->opaque, le->version_id);
974 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
984 LoadStateEntry *le = first_le;
985 first_le = first_le->next;
989 if (qemu_file_has_error(f))
995 /* device can contain snapshots */
996 static int bdrv_can_snapshot(BlockDriverState *bs)
999 !bdrv_is_removable(bs) &&
1000 !bdrv_is_read_only(bs));
1003 /* device must be snapshots in order to have a reliable snapshot */
1004 static int bdrv_has_snapshot(BlockDriverState *bs)
1007 !bdrv_is_removable(bs) &&
1008 !bdrv_is_read_only(bs));
1011 static BlockDriverState *get_bs_snapshots(void)
1013 BlockDriverState *bs;
1017 return bs_snapshots;
1018 for(i = 0; i <= nb_drives; i++) {
1019 bs = drives_table[i].bdrv;
1020 if (bdrv_can_snapshot(bs))
1029 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1032 QEMUSnapshotInfo *sn_tab, *sn;
1036 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1039 for(i = 0; i < nb_sns; i++) {
1041 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1051 void do_savevm(Monitor *mon, const char *name)
1053 BlockDriverState *bs, *bs1;
1054 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1055 int must_delete, ret, i;
1057 int saved_vm_running;
1058 uint32_t vm_state_size;
1065 bs = get_bs_snapshots();
1067 monitor_printf(mon, "No block device can accept snapshots\n");
1071 /* ??? Should this occur after vm_stop? */
1074 saved_vm_running = vm_running;
1079 ret = bdrv_snapshot_find(bs, old_sn, name);
1084 memset(sn, 0, sizeof(*sn));
1086 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1087 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1090 pstrcpy(sn->name, sizeof(sn->name), name);
1093 /* fill auxiliary fields */
1096 sn->date_sec = tb.time;
1097 sn->date_nsec = tb.millitm * 1000000;
1099 gettimeofday(&tv, NULL);
1100 sn->date_sec = tv.tv_sec;
1101 sn->date_nsec = tv.tv_usec * 1000;
1103 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1105 /* save the VM state */
1106 f = qemu_fopen_bdrv(bs, 1);
1108 monitor_printf(mon, "Could not open VM state file\n");
1111 ret = qemu_savevm_state(f);
1112 vm_state_size = qemu_ftell(f);
1115 monitor_printf(mon, "Error %d while writing VM\n", ret);
1119 /* create the snapshots */
1121 for(i = 0; i < nb_drives; i++) {
1122 bs1 = drives_table[i].bdrv;
1123 if (bdrv_has_snapshot(bs1)) {
1125 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1128 "Error while deleting snapshot on '%s'\n",
1129 bdrv_get_device_name(bs1));
1132 /* Write VM state size only to the image that contains the state */
1133 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1134 ret = bdrv_snapshot_create(bs1, sn);
1136 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1137 bdrv_get_device_name(bs1));
1143 if (saved_vm_running)
1147 void do_loadvm(Monitor *mon, const char *name)
1149 BlockDriverState *bs, *bs1;
1150 QEMUSnapshotInfo sn;
1153 int saved_vm_running;
1155 bs = get_bs_snapshots();
1157 monitor_printf(mon, "No block device supports snapshots\n");
1161 /* Flush all IO requests so they don't interfere with the new state. */
1164 saved_vm_running = vm_running;
1167 for(i = 0; i <= nb_drives; i++) {
1168 bs1 = drives_table[i].bdrv;
1169 if (bdrv_has_snapshot(bs1)) {
1170 ret = bdrv_snapshot_goto(bs1, name);
1173 monitor_printf(mon, "Warning: ");
1177 "Snapshots not supported on device '%s'\n",
1178 bdrv_get_device_name(bs1));
1181 monitor_printf(mon, "Could not find snapshot '%s' on "
1183 name, bdrv_get_device_name(bs1));
1186 monitor_printf(mon, "Error %d while activating snapshot on"
1187 " '%s'\n", ret, bdrv_get_device_name(bs1));
1190 /* fatal on snapshot block device */
1197 /* Don't even try to load empty VM states */
1198 ret = bdrv_snapshot_find(bs, &sn, name);
1199 if ((ret >= 0) && (sn.vm_state_size == 0))
1202 /* restore the VM state */
1203 f = qemu_fopen_bdrv(bs, 0);
1205 monitor_printf(mon, "Could not open VM state file\n");
1208 ret = qemu_loadvm_state(f);
1211 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1214 if (saved_vm_running)
1218 void do_delvm(Monitor *mon, const char *name)
1220 BlockDriverState *bs, *bs1;
1223 bs = get_bs_snapshots();
1225 monitor_printf(mon, "No block device supports snapshots\n");
1229 for(i = 0; i <= nb_drives; i++) {
1230 bs1 = drives_table[i].bdrv;
1231 if (bdrv_has_snapshot(bs1)) {
1232 ret = bdrv_snapshot_delete(bs1, name);
1234 if (ret == -ENOTSUP)
1236 "Snapshots not supported on device '%s'\n",
1237 bdrv_get_device_name(bs1));
1239 monitor_printf(mon, "Error %d while deleting snapshot on "
1240 "'%s'\n", ret, bdrv_get_device_name(bs1));
1246 void do_info_snapshots(Monitor *mon)
1248 BlockDriverState *bs, *bs1;
1249 QEMUSnapshotInfo *sn_tab, *sn;
1253 bs = get_bs_snapshots();
1255 monitor_printf(mon, "No available block device supports snapshots\n");
1258 monitor_printf(mon, "Snapshot devices:");
1259 for(i = 0; i <= nb_drives; i++) {
1260 bs1 = drives_table[i].bdrv;
1261 if (bdrv_has_snapshot(bs1)) {
1263 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1266 monitor_printf(mon, "\n");
1268 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1270 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1273 monitor_printf(mon, "Snapshot list (from %s):\n",
1274 bdrv_get_device_name(bs));
1275 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1276 for(i = 0; i < nb_sns; i++) {
1278 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));