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)? */
110 memset(buf, 0xff, 6); /* h_dst */
111 memcpy(buf + 6, mac_addr, 6); /* h_src */
112 memcpy(buf + 12, &proto, 2); /* h_proto */
113 memcpy(buf + 14, &magic, 4); /* magic */
118 void qemu_announce_self(void)
125 for (i = 0; i < MAX_NICS; i++) {
126 if (!nd_table[i].used)
128 len = announce_self_create(buf, nd_table[i].macaddr);
129 vlan = nd_table[i].vlan;
130 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
131 for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
132 vc->fd_read(vc->opaque, buf, len);
137 /***********************************************************/
138 /* savevm/loadvm support */
140 #define IO_BUF_SIZE 32768
143 QEMUFilePutBufferFunc *put_buffer;
144 QEMUFileGetBufferFunc *get_buffer;
145 QEMUFileCloseFunc *close;
146 QEMUFileRateLimit *rate_limit;
150 int64_t buf_offset; /* start of buffer when writing, end of buffer
153 int buf_size; /* 0 when writing */
154 uint8_t buf[IO_BUF_SIZE];
159 typedef struct QEMUFilePopen
165 typedef struct QEMUFileSocket
171 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
173 QEMUFileSocket *s = opaque;
177 len = recv(s->fd, buf, size, 0);
178 } while (len == -1 && socket_error() == EINTR);
181 len = -socket_error();
186 static int socket_close(void *opaque)
188 QEMUFileSocket *s = opaque;
193 static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
195 QEMUFilePopen *s = opaque;
196 return fwrite(buf, 1, size, s->popen_file);
199 static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
201 QEMUFilePopen *s = opaque;
202 return fread(buf, 1, size, s->popen_file);
205 static int popen_close(void *opaque)
207 QEMUFilePopen *s = opaque;
208 pclose(s->popen_file);
213 QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
217 if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
218 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
222 s = qemu_mallocz(sizeof(QEMUFilePopen));
224 s->popen_file = popen_file;
227 s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
229 s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
231 fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
235 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
239 popen_file = popen(command, mode);
240 if(popen_file == NULL) {
244 return qemu_popen(popen_file, mode);
247 QEMUFile *qemu_fopen_socket(int fd)
249 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
252 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
256 typedef struct QEMUFileStdio
261 static int file_put_buffer(void *opaque, const uint8_t *buf,
262 int64_t pos, int size)
264 QEMUFileStdio *s = opaque;
265 fseek(s->outfile, pos, SEEK_SET);
266 fwrite(buf, 1, size, s->outfile);
270 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
272 QEMUFileStdio *s = opaque;
273 fseek(s->outfile, pos, SEEK_SET);
274 return fread(buf, 1, size, s->outfile);
277 static int file_close(void *opaque)
279 QEMUFileStdio *s = opaque;
285 QEMUFile *qemu_fopen(const char *filename, const char *mode)
289 s = qemu_mallocz(sizeof(QEMUFileStdio));
291 s->outfile = fopen(filename, mode);
295 if (!strcmp(mode, "wb"))
296 return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
297 else if (!strcmp(mode, "rb"))
298 return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
307 typedef struct QEMUFileBdrv
309 BlockDriverState *bs;
313 static int block_put_buffer(void *opaque, const uint8_t *buf,
314 int64_t pos, int size)
316 QEMUFileBdrv *s = opaque;
317 bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size);
321 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
323 QEMUFileBdrv *s = opaque;
324 return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
327 static int bdrv_fclose(void *opaque)
329 QEMUFileBdrv *s = opaque;
334 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
338 s = qemu_mallocz(sizeof(QEMUFileBdrv));
341 s->base_offset = offset;
344 return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL);
346 return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL);
349 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
350 QEMUFileGetBufferFunc *get_buffer,
351 QEMUFileCloseFunc *close,
352 QEMUFileRateLimit *rate_limit)
356 f = qemu_mallocz(sizeof(QEMUFile));
359 f->put_buffer = put_buffer;
360 f->get_buffer = get_buffer;
362 f->rate_limit = rate_limit;
368 int qemu_file_has_error(QEMUFile *f)
373 void qemu_fflush(QEMUFile *f)
378 if (f->is_write && f->buf_index > 0) {
381 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
383 f->buf_offset += f->buf_index;
390 static void qemu_fill_buffer(QEMUFile *f)
400 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
404 f->buf_offset += len;
405 } else if (len != -EAGAIN)
409 int qemu_fclose(QEMUFile *f)
414 ret = f->close(f->opaque);
419 void qemu_file_put_notify(QEMUFile *f)
421 f->put_buffer(f->opaque, NULL, 0, 0);
424 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
428 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
430 "Attempted to write to buffer while read buffer is not empty\n");
434 while (!f->has_error && size > 0) {
435 l = IO_BUF_SIZE - f->buf_index;
438 memcpy(f->buf + f->buf_index, buf, l);
443 if (f->buf_index >= IO_BUF_SIZE)
448 void qemu_put_byte(QEMUFile *f, int v)
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 f->buf[f->buf_index++] = v;
458 if (f->buf_index >= IO_BUF_SIZE)
462 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
471 l = f->buf_size - f->buf_index;
474 l = f->buf_size - f->buf_index;
480 memcpy(buf, f->buf + f->buf_index, l);
488 int qemu_get_byte(QEMUFile *f)
493 if (f->buf_index >= f->buf_size) {
495 if (f->buf_index >= f->buf_size)
498 return f->buf[f->buf_index++];
501 int64_t qemu_ftell(QEMUFile *f)
503 return f->buf_offset - f->buf_size + f->buf_index;
506 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
508 if (whence == SEEK_SET) {
510 } else if (whence == SEEK_CUR) {
511 pos += qemu_ftell(f);
513 /* SEEK_END not supported */
527 int qemu_file_rate_limit(QEMUFile *f)
530 return f->rate_limit(f->opaque);
535 void qemu_put_be16(QEMUFile *f, unsigned int v)
537 qemu_put_byte(f, v >> 8);
541 void qemu_put_be32(QEMUFile *f, unsigned int v)
543 qemu_put_byte(f, v >> 24);
544 qemu_put_byte(f, v >> 16);
545 qemu_put_byte(f, v >> 8);
549 void qemu_put_be64(QEMUFile *f, uint64_t v)
551 qemu_put_be32(f, v >> 32);
555 unsigned int qemu_get_be16(QEMUFile *f)
558 v = qemu_get_byte(f) << 8;
559 v |= qemu_get_byte(f);
563 unsigned int qemu_get_be32(QEMUFile *f)
566 v = qemu_get_byte(f) << 24;
567 v |= qemu_get_byte(f) << 16;
568 v |= qemu_get_byte(f) << 8;
569 v |= qemu_get_byte(f);
573 uint64_t qemu_get_be64(QEMUFile *f)
576 v = (uint64_t)qemu_get_be32(f) << 32;
577 v |= qemu_get_be32(f);
581 typedef struct SaveStateEntry {
586 SaveLiveStateHandler *save_live_state;
587 SaveStateHandler *save_state;
588 LoadStateHandler *load_state;
590 struct SaveStateEntry *next;
593 static SaveStateEntry *first_se;
595 /* TODO: Individual devices generally have very little idea about the rest
596 of the system, so instance_id should be removed/replaced.
597 Meanwhile pass -1 as instance_id if you do not already have a clearly
598 distinguishing id for all instances of your device class. */
599 int register_savevm_live(const char *idstr,
602 SaveLiveStateHandler *save_live_state,
603 SaveStateHandler *save_state,
604 LoadStateHandler *load_state,
607 SaveStateEntry *se, **pse;
608 static int global_section_id;
610 se = qemu_malloc(sizeof(SaveStateEntry));
611 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
612 se->instance_id = (instance_id == -1) ? 0 : instance_id;
613 se->version_id = version_id;
614 se->section_id = global_section_id++;
615 se->save_live_state = save_live_state;
616 se->save_state = save_state;
617 se->load_state = load_state;
621 /* add at the end of list */
623 while (*pse != NULL) {
624 if (instance_id == -1
625 && strcmp(se->idstr, (*pse)->idstr) == 0
626 && se->instance_id <= (*pse)->instance_id)
627 se->instance_id = (*pse)->instance_id + 1;
634 int register_savevm(const char *idstr,
637 SaveStateHandler *save_state,
638 LoadStateHandler *load_state,
641 return register_savevm_live(idstr, instance_id, version_id,
642 NULL, save_state, load_state, opaque);
645 #define QEMU_VM_FILE_MAGIC 0x5145564d
646 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
647 #define QEMU_VM_FILE_VERSION 0x00000003
649 #define QEMU_VM_EOF 0x00
650 #define QEMU_VM_SECTION_START 0x01
651 #define QEMU_VM_SECTION_PART 0x02
652 #define QEMU_VM_SECTION_END 0x03
653 #define QEMU_VM_SECTION_FULL 0x04
655 int qemu_savevm_state_begin(QEMUFile *f)
659 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
660 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
662 for (se = first_se; se != NULL; se = se->next) {
665 if (se->save_live_state == NULL)
669 qemu_put_byte(f, QEMU_VM_SECTION_START);
670 qemu_put_be32(f, se->section_id);
673 len = strlen(se->idstr);
674 qemu_put_byte(f, len);
675 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
677 qemu_put_be32(f, se->instance_id);
678 qemu_put_be32(f, se->version_id);
680 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
683 if (qemu_file_has_error(f))
689 int qemu_savevm_state_iterate(QEMUFile *f)
694 for (se = first_se; se != NULL; se = se->next) {
695 if (se->save_live_state == NULL)
699 qemu_put_byte(f, QEMU_VM_SECTION_PART);
700 qemu_put_be32(f, se->section_id);
702 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
708 if (qemu_file_has_error(f))
714 int qemu_savevm_state_complete(QEMUFile *f)
718 for (se = first_se; se != NULL; se = se->next) {
719 if (se->save_live_state == NULL)
723 qemu_put_byte(f, QEMU_VM_SECTION_END);
724 qemu_put_be32(f, se->section_id);
726 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
729 for(se = first_se; se != NULL; se = se->next) {
732 if (se->save_state == NULL)
736 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
737 qemu_put_be32(f, se->section_id);
740 len = strlen(se->idstr);
741 qemu_put_byte(f, len);
742 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
744 qemu_put_be32(f, se->instance_id);
745 qemu_put_be32(f, se->version_id);
747 se->save_state(f, se->opaque);
750 qemu_put_byte(f, QEMU_VM_EOF);
752 if (qemu_file_has_error(f))
758 int qemu_savevm_state(QEMUFile *f)
760 int saved_vm_running;
763 saved_vm_running = vm_running;
768 ret = qemu_savevm_state_begin(f);
773 ret = qemu_savevm_state_iterate(f);
778 ret = qemu_savevm_state_complete(f);
781 if (qemu_file_has_error(f))
784 if (!ret && saved_vm_running)
790 static SaveStateEntry *find_se(const char *idstr, int instance_id)
794 for(se = first_se; se != NULL; se = se->next) {
795 if (!strcmp(se->idstr, idstr) &&
796 instance_id == se->instance_id)
802 typedef struct LoadStateEntry {
806 struct LoadStateEntry *next;
809 static int qemu_loadvm_state_v2(QEMUFile *f)
812 int len, ret, instance_id, record_len, version_id;
813 int64_t total_len, end_pos, cur_pos;
816 total_len = qemu_get_be64(f);
817 end_pos = total_len + qemu_ftell(f);
819 if (qemu_ftell(f) >= end_pos)
821 len = qemu_get_byte(f);
822 qemu_get_buffer(f, (uint8_t *)idstr, len);
824 instance_id = qemu_get_be32(f);
825 version_id = qemu_get_be32(f);
826 record_len = qemu_get_be32(f);
827 cur_pos = qemu_ftell(f);
828 se = find_se(idstr, instance_id);
830 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
833 ret = se->load_state(f, se->opaque, version_id);
835 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
839 /* always seek to exact end of record */
840 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
843 if (qemu_file_has_error(f))
849 int qemu_loadvm_state(QEMUFile *f)
851 LoadStateEntry *first_le = NULL;
852 uint8_t section_type;
856 v = qemu_get_be32(f);
857 if (v != QEMU_VM_FILE_MAGIC)
860 v = qemu_get_be32(f);
861 if (v == QEMU_VM_FILE_VERSION_COMPAT)
862 return qemu_loadvm_state_v2(f);
863 if (v != QEMU_VM_FILE_VERSION)
866 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
867 uint32_t instance_id, version_id, section_id;
873 switch (section_type) {
874 case QEMU_VM_SECTION_START:
875 case QEMU_VM_SECTION_FULL:
876 /* Read section start */
877 section_id = qemu_get_be32(f);
878 len = qemu_get_byte(f);
879 qemu_get_buffer(f, (uint8_t *)idstr, len);
881 instance_id = qemu_get_be32(f);
882 version_id = qemu_get_be32(f);
884 /* Find savevm section */
885 se = find_se(idstr, instance_id);
887 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
892 /* Validate version */
893 if (version_id > se->version_id) {
894 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
895 version_id, idstr, se->version_id);
901 le = qemu_mallocz(sizeof(*le));
904 le->section_id = section_id;
905 le->version_id = version_id;
909 le->se->load_state(f, le->se->opaque, le->version_id);
911 case QEMU_VM_SECTION_PART:
912 case QEMU_VM_SECTION_END:
913 section_id = qemu_get_be32(f);
915 for (le = first_le; le && le->section_id != section_id; le = le->next);
917 fprintf(stderr, "Unknown savevm section %d\n", section_id);
922 le->se->load_state(f, le->se->opaque, le->version_id);
925 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
935 LoadStateEntry *le = first_le;
936 first_le = first_le->next;
940 if (qemu_file_has_error(f))
946 /* device can contain snapshots */
947 static int bdrv_can_snapshot(BlockDriverState *bs)
950 !bdrv_is_removable(bs) &&
951 !bdrv_is_read_only(bs));
954 /* device must be snapshots in order to have a reliable snapshot */
955 static int bdrv_has_snapshot(BlockDriverState *bs)
958 !bdrv_is_removable(bs) &&
959 !bdrv_is_read_only(bs));
962 static BlockDriverState *get_bs_snapshots(void)
964 BlockDriverState *bs;
969 for(i = 0; i <= nb_drives; i++) {
970 bs = drives_table[i].bdrv;
971 if (bdrv_can_snapshot(bs))
980 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
983 QEMUSnapshotInfo *sn_tab, *sn;
987 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
990 for(i = 0; i < nb_sns; i++) {
992 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1002 void do_savevm(Monitor *mon, const char *name)
1004 BlockDriverState *bs, *bs1;
1005 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1006 int must_delete, ret, i;
1007 BlockDriverInfo bdi1, *bdi = &bdi1;
1009 int saved_vm_running;
1010 uint32_t vm_state_size;
1017 bs = get_bs_snapshots();
1019 monitor_printf(mon, "No block device can accept snapshots\n");
1023 /* ??? Should this occur after vm_stop? */
1026 saved_vm_running = vm_running;
1031 ret = bdrv_snapshot_find(bs, old_sn, name);
1036 memset(sn, 0, sizeof(*sn));
1038 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1039 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1042 pstrcpy(sn->name, sizeof(sn->name), name);
1045 /* fill auxiliary fields */
1048 sn->date_sec = tb.time;
1049 sn->date_nsec = tb.millitm * 1000000;
1051 gettimeofday(&tv, NULL);
1052 sn->date_sec = tv.tv_sec;
1053 sn->date_nsec = tv.tv_usec * 1000;
1055 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1057 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1058 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1059 bdrv_get_device_name(bs));
1063 /* save the VM state */
1064 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
1066 monitor_printf(mon, "Could not open VM state file\n");
1069 ret = qemu_savevm_state(f);
1070 vm_state_size = qemu_ftell(f);
1073 monitor_printf(mon, "Error %d while writing VM\n", ret);
1077 /* create the snapshots */
1079 for(i = 0; i < nb_drives; i++) {
1080 bs1 = drives_table[i].bdrv;
1081 if (bdrv_has_snapshot(bs1)) {
1083 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1086 "Error while deleting snapshot on '%s'\n",
1087 bdrv_get_device_name(bs1));
1090 /* Write VM state size only to the image that contains the state */
1091 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1092 ret = bdrv_snapshot_create(bs1, sn);
1094 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1095 bdrv_get_device_name(bs1));
1101 if (saved_vm_running)
1105 void do_loadvm(Monitor *mon, const char *name)
1107 BlockDriverState *bs, *bs1;
1108 BlockDriverInfo bdi1, *bdi = &bdi1;
1109 QEMUSnapshotInfo sn;
1112 int saved_vm_running;
1114 bs = get_bs_snapshots();
1116 monitor_printf(mon, "No block device supports snapshots\n");
1120 /* Flush all IO requests so they don't interfere with the new state. */
1123 saved_vm_running = vm_running;
1126 for(i = 0; i <= nb_drives; i++) {
1127 bs1 = drives_table[i].bdrv;
1128 if (bdrv_has_snapshot(bs1)) {
1129 ret = bdrv_snapshot_goto(bs1, name);
1132 monitor_printf(mon, "Warning: ");
1136 "Snapshots not supported on device '%s'\n",
1137 bdrv_get_device_name(bs1));
1140 monitor_printf(mon, "Could not find snapshot '%s' on "
1142 name, bdrv_get_device_name(bs1));
1145 monitor_printf(mon, "Error %d while activating snapshot on"
1146 " '%s'\n", ret, bdrv_get_device_name(bs1));
1149 /* fatal on snapshot block device */
1156 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1157 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1158 bdrv_get_device_name(bs));
1162 /* Don't even try to load empty VM states */
1163 ret = bdrv_snapshot_find(bs, &sn, name);
1164 if ((ret >= 0) && (sn.vm_state_size == 0))
1167 /* restore the VM state */
1168 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
1170 monitor_printf(mon, "Could not open VM state file\n");
1173 ret = qemu_loadvm_state(f);
1176 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1179 if (saved_vm_running)
1183 void do_delvm(Monitor *mon, const char *name)
1185 BlockDriverState *bs, *bs1;
1188 bs = get_bs_snapshots();
1190 monitor_printf(mon, "No block device supports snapshots\n");
1194 for(i = 0; i <= nb_drives; i++) {
1195 bs1 = drives_table[i].bdrv;
1196 if (bdrv_has_snapshot(bs1)) {
1197 ret = bdrv_snapshot_delete(bs1, name);
1199 if (ret == -ENOTSUP)
1201 "Snapshots not supported on device '%s'\n",
1202 bdrv_get_device_name(bs1));
1204 monitor_printf(mon, "Error %d while deleting snapshot on "
1205 "'%s'\n", ret, bdrv_get_device_name(bs1));
1211 void do_info_snapshots(Monitor *mon)
1213 BlockDriverState *bs, *bs1;
1214 QEMUSnapshotInfo *sn_tab, *sn;
1218 bs = get_bs_snapshots();
1220 monitor_printf(mon, "No available block device supports snapshots\n");
1223 monitor_printf(mon, "Snapshot devices:");
1224 for(i = 0; i <= nb_drives; i++) {
1225 bs1 = drives_table[i].bdrv;
1226 if (bdrv_has_snapshot(bs1)) {
1228 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1231 monitor_printf(mon, "\n");
1233 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1235 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1238 monitor_printf(mon, "Snapshot list (from %s):\n",
1239 bdrv_get_device_name(bs));
1240 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1241 for(i = 0; i < nb_sns; i++) {
1243 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));