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 typedef struct QEMUFileBdrv
342 BlockDriverState *bs;
346 static int block_put_buffer(void *opaque, const uint8_t *buf,
347 int64_t pos, int size)
349 QEMUFileBdrv *s = opaque;
350 bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size);
354 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
356 QEMUFileBdrv *s = opaque;
357 return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
360 static int bdrv_fclose(void *opaque)
362 QEMUFileBdrv *s = opaque;
367 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
371 s = qemu_mallocz(sizeof(QEMUFileBdrv));
374 s->base_offset = offset;
377 return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
379 return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
382 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
383 QEMUFileGetBufferFunc *get_buffer,
384 QEMUFileCloseFunc *close,
385 QEMUFileRateLimit *rate_limit,
386 QEMUFileSetRateLimit *set_rate_limit)
390 f = qemu_mallocz(sizeof(QEMUFile));
393 f->put_buffer = put_buffer;
394 f->get_buffer = get_buffer;
396 f->rate_limit = rate_limit;
397 f->set_rate_limit = set_rate_limit;
403 int qemu_file_has_error(QEMUFile *f)
408 void qemu_file_set_error(QEMUFile *f)
413 void qemu_fflush(QEMUFile *f)
418 if (f->is_write && f->buf_index > 0) {
421 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
423 f->buf_offset += f->buf_index;
430 static void qemu_fill_buffer(QEMUFile *f)
440 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
444 f->buf_offset += len;
445 } else if (len != -EAGAIN)
449 int qemu_fclose(QEMUFile *f)
454 ret = f->close(f->opaque);
459 void qemu_file_put_notify(QEMUFile *f)
461 f->put_buffer(f->opaque, NULL, 0, 0);
464 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
468 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
470 "Attempted to write to buffer while read buffer is not empty\n");
474 while (!f->has_error && size > 0) {
475 l = IO_BUF_SIZE - f->buf_index;
478 memcpy(f->buf + f->buf_index, buf, l);
483 if (f->buf_index >= IO_BUF_SIZE)
488 void qemu_put_byte(QEMUFile *f, int v)
490 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
492 "Attempted to write to buffer while read buffer is not empty\n");
496 f->buf[f->buf_index++] = v;
498 if (f->buf_index >= IO_BUF_SIZE)
502 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
511 l = f->buf_size - f->buf_index;
514 l = f->buf_size - f->buf_index;
520 memcpy(buf, f->buf + f->buf_index, l);
528 int qemu_get_byte(QEMUFile *f)
533 if (f->buf_index >= f->buf_size) {
535 if (f->buf_index >= f->buf_size)
538 return f->buf[f->buf_index++];
541 int64_t qemu_ftell(QEMUFile *f)
543 return f->buf_offset - f->buf_size + f->buf_index;
546 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
548 if (whence == SEEK_SET) {
550 } else if (whence == SEEK_CUR) {
551 pos += qemu_ftell(f);
553 /* SEEK_END not supported */
567 int qemu_file_rate_limit(QEMUFile *f)
570 return f->rate_limit(f->opaque);
575 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
577 if (f->set_rate_limit)
578 return f->set_rate_limit(f->opaque, new_rate);
583 void qemu_put_be16(QEMUFile *f, unsigned int v)
585 qemu_put_byte(f, v >> 8);
589 void qemu_put_be32(QEMUFile *f, unsigned int v)
591 qemu_put_byte(f, v >> 24);
592 qemu_put_byte(f, v >> 16);
593 qemu_put_byte(f, v >> 8);
597 void qemu_put_be64(QEMUFile *f, uint64_t v)
599 qemu_put_be32(f, v >> 32);
603 unsigned int qemu_get_be16(QEMUFile *f)
606 v = qemu_get_byte(f) << 8;
607 v |= qemu_get_byte(f);
611 unsigned int qemu_get_be32(QEMUFile *f)
614 v = qemu_get_byte(f) << 24;
615 v |= qemu_get_byte(f) << 16;
616 v |= qemu_get_byte(f) << 8;
617 v |= qemu_get_byte(f);
621 uint64_t qemu_get_be64(QEMUFile *f)
624 v = (uint64_t)qemu_get_be32(f) << 32;
625 v |= qemu_get_be32(f);
629 typedef struct SaveStateEntry {
634 SaveLiveStateHandler *save_live_state;
635 SaveStateHandler *save_state;
636 LoadStateHandler *load_state;
638 struct SaveStateEntry *next;
641 static SaveStateEntry *first_se;
643 /* TODO: Individual devices generally have very little idea about the rest
644 of the system, so instance_id should be removed/replaced.
645 Meanwhile pass -1 as instance_id if you do not already have a clearly
646 distinguishing id for all instances of your device class. */
647 int register_savevm_live(const char *idstr,
650 SaveLiveStateHandler *save_live_state,
651 SaveStateHandler *save_state,
652 LoadStateHandler *load_state,
655 SaveStateEntry *se, **pse;
656 static int global_section_id;
658 se = qemu_malloc(sizeof(SaveStateEntry));
659 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
660 se->instance_id = (instance_id == -1) ? 0 : instance_id;
661 se->version_id = version_id;
662 se->section_id = global_section_id++;
663 se->save_live_state = save_live_state;
664 se->save_state = save_state;
665 se->load_state = load_state;
669 /* add at the end of list */
671 while (*pse != NULL) {
672 if (instance_id == -1
673 && strcmp(se->idstr, (*pse)->idstr) == 0
674 && se->instance_id <= (*pse)->instance_id)
675 se->instance_id = (*pse)->instance_id + 1;
682 int register_savevm(const char *idstr,
685 SaveStateHandler *save_state,
686 LoadStateHandler *load_state,
689 return register_savevm_live(idstr, instance_id, version_id,
690 NULL, save_state, load_state, opaque);
693 void unregister_savevm(const char *idstr, void *opaque)
695 SaveStateEntry **pse;
698 while (*pse != NULL) {
699 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
700 SaveStateEntry *next = (*pse)->next;
709 #define QEMU_VM_FILE_MAGIC 0x5145564d
710 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
711 #define QEMU_VM_FILE_VERSION 0x00000003
713 #define QEMU_VM_EOF 0x00
714 #define QEMU_VM_SECTION_START 0x01
715 #define QEMU_VM_SECTION_PART 0x02
716 #define QEMU_VM_SECTION_END 0x03
717 #define QEMU_VM_SECTION_FULL 0x04
719 int qemu_savevm_state_begin(QEMUFile *f)
723 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
724 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
726 for (se = first_se; se != NULL; se = se->next) {
729 if (se->save_live_state == NULL)
733 qemu_put_byte(f, QEMU_VM_SECTION_START);
734 qemu_put_be32(f, se->section_id);
737 len = strlen(se->idstr);
738 qemu_put_byte(f, len);
739 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
741 qemu_put_be32(f, se->instance_id);
742 qemu_put_be32(f, se->version_id);
744 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
747 if (qemu_file_has_error(f))
753 int qemu_savevm_state_iterate(QEMUFile *f)
758 for (se = first_se; se != NULL; se = se->next) {
759 if (se->save_live_state == NULL)
763 qemu_put_byte(f, QEMU_VM_SECTION_PART);
764 qemu_put_be32(f, se->section_id);
766 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
772 if (qemu_file_has_error(f))
778 int qemu_savevm_state_complete(QEMUFile *f)
782 for (se = first_se; se != NULL; se = se->next) {
783 if (se->save_live_state == NULL)
787 qemu_put_byte(f, QEMU_VM_SECTION_END);
788 qemu_put_be32(f, se->section_id);
790 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
793 for(se = first_se; se != NULL; se = se->next) {
796 if (se->save_state == NULL)
800 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
801 qemu_put_be32(f, se->section_id);
804 len = strlen(se->idstr);
805 qemu_put_byte(f, len);
806 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
808 qemu_put_be32(f, se->instance_id);
809 qemu_put_be32(f, se->version_id);
811 se->save_state(f, se->opaque);
814 qemu_put_byte(f, QEMU_VM_EOF);
816 if (qemu_file_has_error(f))
822 int qemu_savevm_state(QEMUFile *f)
824 int saved_vm_running;
827 saved_vm_running = vm_running;
832 ret = qemu_savevm_state_begin(f);
837 ret = qemu_savevm_state_iterate(f);
842 ret = qemu_savevm_state_complete(f);
845 if (qemu_file_has_error(f))
848 if (!ret && saved_vm_running)
854 static SaveStateEntry *find_se(const char *idstr, int instance_id)
858 for(se = first_se; se != NULL; se = se->next) {
859 if (!strcmp(se->idstr, idstr) &&
860 instance_id == se->instance_id)
866 typedef struct LoadStateEntry {
870 struct LoadStateEntry *next;
873 static int qemu_loadvm_state_v2(QEMUFile *f)
876 int len, ret, instance_id, record_len, version_id;
877 int64_t total_len, end_pos, cur_pos;
880 total_len = qemu_get_be64(f);
881 end_pos = total_len + qemu_ftell(f);
883 if (qemu_ftell(f) >= end_pos)
885 len = qemu_get_byte(f);
886 qemu_get_buffer(f, (uint8_t *)idstr, len);
888 instance_id = qemu_get_be32(f);
889 version_id = qemu_get_be32(f);
890 record_len = qemu_get_be32(f);
891 cur_pos = qemu_ftell(f);
892 se = find_se(idstr, instance_id);
894 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
897 ret = se->load_state(f, se->opaque, version_id);
899 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
904 /* always seek to exact end of record */
905 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
908 if (qemu_file_has_error(f))
914 int qemu_loadvm_state(QEMUFile *f)
916 LoadStateEntry *first_le = NULL;
917 uint8_t section_type;
921 v = qemu_get_be32(f);
922 if (v != QEMU_VM_FILE_MAGIC)
925 v = qemu_get_be32(f);
926 if (v == QEMU_VM_FILE_VERSION_COMPAT)
927 return qemu_loadvm_state_v2(f);
928 if (v != QEMU_VM_FILE_VERSION)
931 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
932 uint32_t instance_id, version_id, section_id;
938 switch (section_type) {
939 case QEMU_VM_SECTION_START:
940 case QEMU_VM_SECTION_FULL:
941 /* Read section start */
942 section_id = qemu_get_be32(f);
943 len = qemu_get_byte(f);
944 qemu_get_buffer(f, (uint8_t *)idstr, len);
946 instance_id = qemu_get_be32(f);
947 version_id = qemu_get_be32(f);
949 /* Find savevm section */
950 se = find_se(idstr, instance_id);
952 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
957 /* Validate version */
958 if (version_id > se->version_id) {
959 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
960 version_id, idstr, se->version_id);
966 le = qemu_mallocz(sizeof(*le));
969 le->section_id = section_id;
970 le->version_id = version_id;
974 le->se->load_state(f, le->se->opaque, le->version_id);
976 case QEMU_VM_SECTION_PART:
977 case QEMU_VM_SECTION_END:
978 section_id = qemu_get_be32(f);
980 for (le = first_le; le && le->section_id != section_id; le = le->next);
982 fprintf(stderr, "Unknown savevm section %d\n", section_id);
987 le->se->load_state(f, le->se->opaque, le->version_id);
990 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1000 LoadStateEntry *le = first_le;
1001 first_le = first_le->next;
1005 if (qemu_file_has_error(f))
1011 /* device can contain snapshots */
1012 static int bdrv_can_snapshot(BlockDriverState *bs)
1015 !bdrv_is_removable(bs) &&
1016 !bdrv_is_read_only(bs));
1019 /* device must be snapshots in order to have a reliable snapshot */
1020 static int bdrv_has_snapshot(BlockDriverState *bs)
1023 !bdrv_is_removable(bs) &&
1024 !bdrv_is_read_only(bs));
1027 static BlockDriverState *get_bs_snapshots(void)
1029 BlockDriverState *bs;
1033 return bs_snapshots;
1034 for(i = 0; i <= nb_drives; i++) {
1035 bs = drives_table[i].bdrv;
1036 if (bdrv_can_snapshot(bs))
1045 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1048 QEMUSnapshotInfo *sn_tab, *sn;
1052 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1055 for(i = 0; i < nb_sns; i++) {
1057 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1067 void do_savevm(Monitor *mon, const char *name)
1069 BlockDriverState *bs, *bs1;
1070 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1071 int must_delete, ret, i;
1072 BlockDriverInfo bdi1, *bdi = &bdi1;
1074 int saved_vm_running;
1075 uint32_t vm_state_size;
1082 bs = get_bs_snapshots();
1084 monitor_printf(mon, "No block device can accept snapshots\n");
1088 /* ??? Should this occur after vm_stop? */
1091 saved_vm_running = vm_running;
1096 ret = bdrv_snapshot_find(bs, old_sn, name);
1101 memset(sn, 0, sizeof(*sn));
1103 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1104 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1107 pstrcpy(sn->name, sizeof(sn->name), name);
1110 /* fill auxiliary fields */
1113 sn->date_sec = tb.time;
1114 sn->date_nsec = tb.millitm * 1000000;
1116 gettimeofday(&tv, NULL);
1117 sn->date_sec = tv.tv_sec;
1118 sn->date_nsec = tv.tv_usec * 1000;
1120 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1122 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1123 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1124 bdrv_get_device_name(bs));
1128 /* save the VM state */
1129 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
1131 monitor_printf(mon, "Could not open VM state file\n");
1134 ret = qemu_savevm_state(f);
1135 vm_state_size = qemu_ftell(f);
1138 monitor_printf(mon, "Error %d while writing VM\n", ret);
1142 /* create the snapshots */
1144 for(i = 0; i < nb_drives; i++) {
1145 bs1 = drives_table[i].bdrv;
1146 if (bdrv_has_snapshot(bs1)) {
1148 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1151 "Error while deleting snapshot on '%s'\n",
1152 bdrv_get_device_name(bs1));
1155 /* Write VM state size only to the image that contains the state */
1156 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1157 ret = bdrv_snapshot_create(bs1, sn);
1159 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1160 bdrv_get_device_name(bs1));
1166 if (saved_vm_running)
1170 void do_loadvm(Monitor *mon, const char *name)
1172 BlockDriverState *bs, *bs1;
1173 BlockDriverInfo bdi1, *bdi = &bdi1;
1174 QEMUSnapshotInfo sn;
1177 int saved_vm_running;
1179 bs = get_bs_snapshots();
1181 monitor_printf(mon, "No block device supports snapshots\n");
1185 /* Flush all IO requests so they don't interfere with the new state. */
1188 saved_vm_running = vm_running;
1191 for(i = 0; i <= nb_drives; i++) {
1192 bs1 = drives_table[i].bdrv;
1193 if (bdrv_has_snapshot(bs1)) {
1194 ret = bdrv_snapshot_goto(bs1, name);
1197 monitor_printf(mon, "Warning: ");
1201 "Snapshots not supported on device '%s'\n",
1202 bdrv_get_device_name(bs1));
1205 monitor_printf(mon, "Could not find snapshot '%s' on "
1207 name, bdrv_get_device_name(bs1));
1210 monitor_printf(mon, "Error %d while activating snapshot on"
1211 " '%s'\n", ret, bdrv_get_device_name(bs1));
1214 /* fatal on snapshot block device */
1221 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1222 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1223 bdrv_get_device_name(bs));
1227 /* Don't even try to load empty VM states */
1228 ret = bdrv_snapshot_find(bs, &sn, name);
1229 if ((ret >= 0) && (sn.vm_state_size == 0))
1232 /* restore the VM state */
1233 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
1235 monitor_printf(mon, "Could not open VM state file\n");
1238 ret = qemu_loadvm_state(f);
1241 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1244 if (saved_vm_running)
1248 void do_delvm(Monitor *mon, const char *name)
1250 BlockDriverState *bs, *bs1;
1253 bs = get_bs_snapshots();
1255 monitor_printf(mon, "No block device supports snapshots\n");
1259 for(i = 0; i <= nb_drives; i++) {
1260 bs1 = drives_table[i].bdrv;
1261 if (bdrv_has_snapshot(bs1)) {
1262 ret = bdrv_snapshot_delete(bs1, name);
1264 if (ret == -ENOTSUP)
1266 "Snapshots not supported on device '%s'\n",
1267 bdrv_get_device_name(bs1));
1269 monitor_printf(mon, "Error %d while deleting snapshot on "
1270 "'%s'\n", ret, bdrv_get_device_name(bs1));
1276 void do_info_snapshots(Monitor *mon)
1278 BlockDriverState *bs, *bs1;
1279 QEMUSnapshotInfo *sn_tab, *sn;
1283 bs = get_bs_snapshots();
1285 monitor_printf(mon, "No available block device supports snapshots\n");
1288 monitor_printf(mon, "Snapshot devices:");
1289 for(i = 0; i <= nb_drives; i++) {
1290 bs1 = drives_table[i].bdrv;
1291 if (bdrv_has_snapshot(bs1)) {
1293 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1296 monitor_printf(mon, "\n");
1298 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1300 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1303 monitor_printf(mon, "Snapshot list (from %s):\n",
1304 bdrv_get_device_name(bs));
1305 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1306 for(i = 0; i < nb_sns; i++) {
1308 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));