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 void qemu_announce_self(void)
126 for (i = 0; i < MAX_NICS; i++) {
127 if (!nd_table[i].used)
129 len = announce_self_create(buf, nd_table[i].macaddr);
130 vlan = nd_table[i].vlan;
131 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
132 for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
133 vc->fd_read(vc->opaque, buf, len);
138 /***********************************************************/
139 /* savevm/loadvm support */
141 #define IO_BUF_SIZE 32768
144 QEMUFilePutBufferFunc *put_buffer;
145 QEMUFileGetBufferFunc *get_buffer;
146 QEMUFileCloseFunc *close;
147 QEMUFileRateLimit *rate_limit;
151 int64_t buf_offset; /* start of buffer when writing, end of buffer
154 int buf_size; /* 0 when writing */
155 uint8_t buf[IO_BUF_SIZE];
160 typedef struct QEMUFilePopen
166 typedef struct QEMUFileSocket
172 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
174 QEMUFileSocket *s = opaque;
178 len = recv(s->fd, buf, size, 0);
179 } while (len == -1 && socket_error() == EINTR);
182 len = -socket_error();
187 static int socket_close(void *opaque)
189 QEMUFileSocket *s = opaque;
194 static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
196 QEMUFilePopen *s = opaque;
197 return fwrite(buf, 1, size, s->popen_file);
200 static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
202 QEMUFilePopen *s = opaque;
203 return fread(buf, 1, size, s->popen_file);
206 static int popen_close(void *opaque)
208 QEMUFilePopen *s = opaque;
209 pclose(s->popen_file);
214 QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
218 if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
219 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
223 s = qemu_mallocz(sizeof(QEMUFilePopen));
225 s->popen_file = popen_file;
228 s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
230 s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
232 fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
236 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
240 popen_file = popen(command, mode);
241 if(popen_file == NULL) {
245 return qemu_popen(popen_file, mode);
248 QEMUFile *qemu_fopen_socket(int fd)
250 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
253 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
257 typedef struct QEMUFileStdio
262 static int file_put_buffer(void *opaque, const uint8_t *buf,
263 int64_t pos, int size)
265 QEMUFileStdio *s = opaque;
266 fseek(s->outfile, pos, SEEK_SET);
267 fwrite(buf, 1, size, s->outfile);
271 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
273 QEMUFileStdio *s = opaque;
274 fseek(s->outfile, pos, SEEK_SET);
275 return fread(buf, 1, size, s->outfile);
278 static int file_close(void *opaque)
280 QEMUFileStdio *s = opaque;
286 QEMUFile *qemu_fopen(const char *filename, const char *mode)
290 s = qemu_mallocz(sizeof(QEMUFileStdio));
292 s->outfile = fopen(filename, mode);
296 if (!strcmp(mode, "wb"))
297 return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
298 else if (!strcmp(mode, "rb"))
299 return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
308 typedef struct QEMUFileBdrv
310 BlockDriverState *bs;
314 static int block_put_buffer(void *opaque, const uint8_t *buf,
315 int64_t pos, int size)
317 QEMUFileBdrv *s = opaque;
318 bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size);
322 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
324 QEMUFileBdrv *s = opaque;
325 return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
328 static int bdrv_fclose(void *opaque)
330 QEMUFileBdrv *s = opaque;
335 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
339 s = qemu_mallocz(sizeof(QEMUFileBdrv));
342 s->base_offset = offset;
345 return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL);
347 return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL);
350 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
351 QEMUFileGetBufferFunc *get_buffer,
352 QEMUFileCloseFunc *close,
353 QEMUFileRateLimit *rate_limit)
357 f = qemu_mallocz(sizeof(QEMUFile));
360 f->put_buffer = put_buffer;
361 f->get_buffer = get_buffer;
363 f->rate_limit = rate_limit;
369 int qemu_file_has_error(QEMUFile *f)
374 void qemu_file_set_error(QEMUFile *f)
379 void qemu_fflush(QEMUFile *f)
384 if (f->is_write && f->buf_index > 0) {
387 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
389 f->buf_offset += f->buf_index;
396 static void qemu_fill_buffer(QEMUFile *f)
406 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
410 f->buf_offset += len;
411 } else if (len != -EAGAIN)
415 int qemu_fclose(QEMUFile *f)
420 ret = f->close(f->opaque);
425 void qemu_file_put_notify(QEMUFile *f)
427 f->put_buffer(f->opaque, NULL, 0, 0);
430 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
434 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
436 "Attempted to write to buffer while read buffer is not empty\n");
440 while (!f->has_error && size > 0) {
441 l = IO_BUF_SIZE - f->buf_index;
444 memcpy(f->buf + f->buf_index, buf, l);
449 if (f->buf_index >= IO_BUF_SIZE)
454 void qemu_put_byte(QEMUFile *f, int v)
456 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
458 "Attempted to write to buffer while read buffer is not empty\n");
462 f->buf[f->buf_index++] = v;
464 if (f->buf_index >= IO_BUF_SIZE)
468 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
477 l = f->buf_size - f->buf_index;
480 l = f->buf_size - f->buf_index;
486 memcpy(buf, f->buf + f->buf_index, l);
494 int qemu_get_byte(QEMUFile *f)
499 if (f->buf_index >= f->buf_size) {
501 if (f->buf_index >= f->buf_size)
504 return f->buf[f->buf_index++];
507 int64_t qemu_ftell(QEMUFile *f)
509 return f->buf_offset - f->buf_size + f->buf_index;
512 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
514 if (whence == SEEK_SET) {
516 } else if (whence == SEEK_CUR) {
517 pos += qemu_ftell(f);
519 /* SEEK_END not supported */
533 int qemu_file_rate_limit(QEMUFile *f)
536 return f->rate_limit(f->opaque);
541 void qemu_put_be16(QEMUFile *f, unsigned int v)
543 qemu_put_byte(f, v >> 8);
547 void qemu_put_be32(QEMUFile *f, unsigned int v)
549 qemu_put_byte(f, v >> 24);
550 qemu_put_byte(f, v >> 16);
551 qemu_put_byte(f, v >> 8);
555 void qemu_put_be64(QEMUFile *f, uint64_t v)
557 qemu_put_be32(f, v >> 32);
561 unsigned int qemu_get_be16(QEMUFile *f)
564 v = qemu_get_byte(f) << 8;
565 v |= qemu_get_byte(f);
569 unsigned int qemu_get_be32(QEMUFile *f)
572 v = qemu_get_byte(f) << 24;
573 v |= qemu_get_byte(f) << 16;
574 v |= qemu_get_byte(f) << 8;
575 v |= qemu_get_byte(f);
579 uint64_t qemu_get_be64(QEMUFile *f)
582 v = (uint64_t)qemu_get_be32(f) << 32;
583 v |= qemu_get_be32(f);
587 typedef struct SaveStateEntry {
592 SaveLiveStateHandler *save_live_state;
593 SaveStateHandler *save_state;
594 LoadStateHandler *load_state;
596 struct SaveStateEntry *next;
599 static SaveStateEntry *first_se;
601 /* TODO: Individual devices generally have very little idea about the rest
602 of the system, so instance_id should be removed/replaced.
603 Meanwhile pass -1 as instance_id if you do not already have a clearly
604 distinguishing id for all instances of your device class. */
605 int register_savevm_live(const char *idstr,
608 SaveLiveStateHandler *save_live_state,
609 SaveStateHandler *save_state,
610 LoadStateHandler *load_state,
613 SaveStateEntry *se, **pse;
614 static int global_section_id;
616 se = qemu_malloc(sizeof(SaveStateEntry));
617 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
618 se->instance_id = (instance_id == -1) ? 0 : instance_id;
619 se->version_id = version_id;
620 se->section_id = global_section_id++;
621 se->save_live_state = save_live_state;
622 se->save_state = save_state;
623 se->load_state = load_state;
627 /* add at the end of list */
629 while (*pse != NULL) {
630 if (instance_id == -1
631 && strcmp(se->idstr, (*pse)->idstr) == 0
632 && se->instance_id <= (*pse)->instance_id)
633 se->instance_id = (*pse)->instance_id + 1;
640 int register_savevm(const char *idstr,
643 SaveStateHandler *save_state,
644 LoadStateHandler *load_state,
647 return register_savevm_live(idstr, instance_id, version_id,
648 NULL, save_state, load_state, opaque);
651 void unregister_savevm(const char *idstr, void *opaque)
653 SaveStateEntry **pse;
656 while (*pse != NULL) {
657 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
658 SaveStateEntry *next = (*pse)->next;
667 #define QEMU_VM_FILE_MAGIC 0x5145564d
668 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
669 #define QEMU_VM_FILE_VERSION 0x00000003
671 #define QEMU_VM_EOF 0x00
672 #define QEMU_VM_SECTION_START 0x01
673 #define QEMU_VM_SECTION_PART 0x02
674 #define QEMU_VM_SECTION_END 0x03
675 #define QEMU_VM_SECTION_FULL 0x04
677 int qemu_savevm_state_begin(QEMUFile *f)
681 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
682 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
684 for (se = first_se; se != NULL; se = se->next) {
687 if (se->save_live_state == NULL)
691 qemu_put_byte(f, QEMU_VM_SECTION_START);
692 qemu_put_be32(f, se->section_id);
695 len = strlen(se->idstr);
696 qemu_put_byte(f, len);
697 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
699 qemu_put_be32(f, se->instance_id);
700 qemu_put_be32(f, se->version_id);
702 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
705 if (qemu_file_has_error(f))
711 int qemu_savevm_state_iterate(QEMUFile *f)
716 for (se = first_se; se != NULL; se = se->next) {
717 if (se->save_live_state == NULL)
721 qemu_put_byte(f, QEMU_VM_SECTION_PART);
722 qemu_put_be32(f, se->section_id);
724 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
730 if (qemu_file_has_error(f))
736 int qemu_savevm_state_complete(QEMUFile *f)
740 for (se = first_se; se != NULL; se = se->next) {
741 if (se->save_live_state == NULL)
745 qemu_put_byte(f, QEMU_VM_SECTION_END);
746 qemu_put_be32(f, se->section_id);
748 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
751 for(se = first_se; se != NULL; se = se->next) {
754 if (se->save_state == NULL)
758 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
759 qemu_put_be32(f, se->section_id);
762 len = strlen(se->idstr);
763 qemu_put_byte(f, len);
764 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
766 qemu_put_be32(f, se->instance_id);
767 qemu_put_be32(f, se->version_id);
769 se->save_state(f, se->opaque);
772 qemu_put_byte(f, QEMU_VM_EOF);
774 if (qemu_file_has_error(f))
780 int qemu_savevm_state(QEMUFile *f)
782 int saved_vm_running;
785 saved_vm_running = vm_running;
790 ret = qemu_savevm_state_begin(f);
795 ret = qemu_savevm_state_iterate(f);
800 ret = qemu_savevm_state_complete(f);
803 if (qemu_file_has_error(f))
806 if (!ret && saved_vm_running)
812 static SaveStateEntry *find_se(const char *idstr, int instance_id)
816 for(se = first_se; se != NULL; se = se->next) {
817 if (!strcmp(se->idstr, idstr) &&
818 instance_id == se->instance_id)
824 typedef struct LoadStateEntry {
828 struct LoadStateEntry *next;
831 static int qemu_loadvm_state_v2(QEMUFile *f)
834 int len, ret, instance_id, record_len, version_id;
835 int64_t total_len, end_pos, cur_pos;
838 total_len = qemu_get_be64(f);
839 end_pos = total_len + qemu_ftell(f);
841 if (qemu_ftell(f) >= end_pos)
843 len = qemu_get_byte(f);
844 qemu_get_buffer(f, (uint8_t *)idstr, len);
846 instance_id = qemu_get_be32(f);
847 version_id = qemu_get_be32(f);
848 record_len = qemu_get_be32(f);
849 cur_pos = qemu_ftell(f);
850 se = find_se(idstr, instance_id);
852 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
855 ret = se->load_state(f, se->opaque, version_id);
857 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
862 /* always seek to exact end of record */
863 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
866 if (qemu_file_has_error(f))
872 int qemu_loadvm_state(QEMUFile *f)
874 LoadStateEntry *first_le = NULL;
875 uint8_t section_type;
879 v = qemu_get_be32(f);
880 if (v != QEMU_VM_FILE_MAGIC)
883 v = qemu_get_be32(f);
884 if (v == QEMU_VM_FILE_VERSION_COMPAT)
885 return qemu_loadvm_state_v2(f);
886 if (v != QEMU_VM_FILE_VERSION)
889 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
890 uint32_t instance_id, version_id, section_id;
896 switch (section_type) {
897 case QEMU_VM_SECTION_START:
898 case QEMU_VM_SECTION_FULL:
899 /* Read section start */
900 section_id = qemu_get_be32(f);
901 len = qemu_get_byte(f);
902 qemu_get_buffer(f, (uint8_t *)idstr, len);
904 instance_id = qemu_get_be32(f);
905 version_id = qemu_get_be32(f);
907 /* Find savevm section */
908 se = find_se(idstr, instance_id);
910 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
915 /* Validate version */
916 if (version_id > se->version_id) {
917 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
918 version_id, idstr, se->version_id);
924 le = qemu_mallocz(sizeof(*le));
927 le->section_id = section_id;
928 le->version_id = version_id;
932 le->se->load_state(f, le->se->opaque, le->version_id);
934 case QEMU_VM_SECTION_PART:
935 case QEMU_VM_SECTION_END:
936 section_id = qemu_get_be32(f);
938 for (le = first_le; le && le->section_id != section_id; le = le->next);
940 fprintf(stderr, "Unknown savevm section %d\n", section_id);
945 le->se->load_state(f, le->se->opaque, le->version_id);
948 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
958 LoadStateEntry *le = first_le;
959 first_le = first_le->next;
963 if (qemu_file_has_error(f))
969 /* device can contain snapshots */
970 static int bdrv_can_snapshot(BlockDriverState *bs)
973 !bdrv_is_removable(bs) &&
974 !bdrv_is_read_only(bs));
977 /* device must be snapshots in order to have a reliable snapshot */
978 static int bdrv_has_snapshot(BlockDriverState *bs)
981 !bdrv_is_removable(bs) &&
982 !bdrv_is_read_only(bs));
985 static BlockDriverState *get_bs_snapshots(void)
987 BlockDriverState *bs;
992 for(i = 0; i <= nb_drives; i++) {
993 bs = drives_table[i].bdrv;
994 if (bdrv_can_snapshot(bs))
1003 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1006 QEMUSnapshotInfo *sn_tab, *sn;
1010 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1013 for(i = 0; i < nb_sns; i++) {
1015 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1025 void do_savevm(Monitor *mon, const char *name)
1027 BlockDriverState *bs, *bs1;
1028 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1029 int must_delete, ret, i;
1030 BlockDriverInfo bdi1, *bdi = &bdi1;
1032 int saved_vm_running;
1033 uint32_t vm_state_size;
1040 bs = get_bs_snapshots();
1042 monitor_printf(mon, "No block device can accept snapshots\n");
1046 /* ??? Should this occur after vm_stop? */
1049 saved_vm_running = vm_running;
1054 ret = bdrv_snapshot_find(bs, old_sn, name);
1059 memset(sn, 0, sizeof(*sn));
1061 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1062 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1065 pstrcpy(sn->name, sizeof(sn->name), name);
1068 /* fill auxiliary fields */
1071 sn->date_sec = tb.time;
1072 sn->date_nsec = tb.millitm * 1000000;
1074 gettimeofday(&tv, NULL);
1075 sn->date_sec = tv.tv_sec;
1076 sn->date_nsec = tv.tv_usec * 1000;
1078 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1080 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1081 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1082 bdrv_get_device_name(bs));
1086 /* save the VM state */
1087 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
1089 monitor_printf(mon, "Could not open VM state file\n");
1092 ret = qemu_savevm_state(f);
1093 vm_state_size = qemu_ftell(f);
1096 monitor_printf(mon, "Error %d while writing VM\n", ret);
1100 /* create the snapshots */
1102 for(i = 0; i < nb_drives; i++) {
1103 bs1 = drives_table[i].bdrv;
1104 if (bdrv_has_snapshot(bs1)) {
1106 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1109 "Error while deleting snapshot on '%s'\n",
1110 bdrv_get_device_name(bs1));
1113 /* Write VM state size only to the image that contains the state */
1114 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1115 ret = bdrv_snapshot_create(bs1, sn);
1117 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1118 bdrv_get_device_name(bs1));
1124 if (saved_vm_running)
1128 void do_loadvm(Monitor *mon, const char *name)
1130 BlockDriverState *bs, *bs1;
1131 BlockDriverInfo bdi1, *bdi = &bdi1;
1132 QEMUSnapshotInfo sn;
1135 int saved_vm_running;
1137 bs = get_bs_snapshots();
1139 monitor_printf(mon, "No block device supports snapshots\n");
1143 /* Flush all IO requests so they don't interfere with the new state. */
1146 saved_vm_running = vm_running;
1149 for(i = 0; i <= nb_drives; i++) {
1150 bs1 = drives_table[i].bdrv;
1151 if (bdrv_has_snapshot(bs1)) {
1152 ret = bdrv_snapshot_goto(bs1, name);
1155 monitor_printf(mon, "Warning: ");
1159 "Snapshots not supported on device '%s'\n",
1160 bdrv_get_device_name(bs1));
1163 monitor_printf(mon, "Could not find snapshot '%s' on "
1165 name, bdrv_get_device_name(bs1));
1168 monitor_printf(mon, "Error %d while activating snapshot on"
1169 " '%s'\n", ret, bdrv_get_device_name(bs1));
1172 /* fatal on snapshot block device */
1179 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1180 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1181 bdrv_get_device_name(bs));
1185 /* Don't even try to load empty VM states */
1186 ret = bdrv_snapshot_find(bs, &sn, name);
1187 if ((ret >= 0) && (sn.vm_state_size == 0))
1190 /* restore the VM state */
1191 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
1193 monitor_printf(mon, "Could not open VM state file\n");
1196 ret = qemu_loadvm_state(f);
1199 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1202 if (saved_vm_running)
1206 void do_delvm(Monitor *mon, const char *name)
1208 BlockDriverState *bs, *bs1;
1211 bs = get_bs_snapshots();
1213 monitor_printf(mon, "No block device supports snapshots\n");
1217 for(i = 0; i <= nb_drives; i++) {
1218 bs1 = drives_table[i].bdrv;
1219 if (bdrv_has_snapshot(bs1)) {
1220 ret = bdrv_snapshot_delete(bs1, name);
1222 if (ret == -ENOTSUP)
1224 "Snapshots not supported on device '%s'\n",
1225 bdrv_get_device_name(bs1));
1227 monitor_printf(mon, "Error %d while deleting snapshot on "
1228 "'%s'\n", ret, bdrv_get_device_name(bs1));
1234 void do_info_snapshots(Monitor *mon)
1236 BlockDriverState *bs, *bs1;
1237 QEMUSnapshotInfo *sn_tab, *sn;
1241 bs = get_bs_snapshots();
1243 monitor_printf(mon, "No available block device supports snapshots\n");
1246 monitor_printf(mon, "Snapshot devices:");
1247 for(i = 0; i <= nb_drives; i++) {
1248 bs1 = drives_table[i].bdrv;
1249 if (bdrv_has_snapshot(bs1)) {
1251 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1254 monitor_printf(mon, "\n");
1256 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1258 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1261 monitor_printf(mon, "Snapshot list (from %s):\n",
1262 bdrv_get_device_name(bs));
1263 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1264 for(i = 0; i < nb_sns; i++) {
1266 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));