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->opaque, 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, 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 return fread(buf, 1, size, s->popen_file);
221 static int popen_close(void *opaque)
223 QEMUFilePopen *s = opaque;
224 pclose(s->popen_file);
229 QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
233 if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
234 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
238 s = qemu_mallocz(sizeof(QEMUFilePopen));
240 s->popen_file = popen_file;
243 s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL);
245 s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL);
250 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
254 popen_file = popen(command, mode);
255 if(popen_file == NULL) {
259 return qemu_popen(popen_file, mode);
262 int qemu_popen_fd(QEMUFile *f)
267 p = (QEMUFilePopen *)f->opaque;
268 fd = fileno(p->popen_file);
273 QEMUFile *qemu_fopen_socket(int fd)
275 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
278 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL);
282 typedef struct QEMUFileStdio
287 static int file_put_buffer(void *opaque, const uint8_t *buf,
288 int64_t pos, int size)
290 QEMUFileStdio *s = opaque;
291 fseek(s->outfile, pos, SEEK_SET);
292 fwrite(buf, 1, size, s->outfile);
296 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
298 QEMUFileStdio *s = opaque;
299 fseek(s->outfile, pos, SEEK_SET);
300 return fread(buf, 1, size, s->outfile);
303 static int file_close(void *opaque)
305 QEMUFileStdio *s = opaque;
311 QEMUFile *qemu_fopen(const char *filename, const char *mode)
315 s = qemu_mallocz(sizeof(QEMUFileStdio));
317 s->outfile = fopen(filename, mode);
321 if (!strcmp(mode, "wb"))
322 return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL, NULL);
323 else if (!strcmp(mode, "rb"))
324 return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL, NULL);
333 typedef struct QEMUFileBdrv
335 BlockDriverState *bs;
339 static int block_put_buffer(void *opaque, const uint8_t *buf,
340 int64_t pos, int size)
342 QEMUFileBdrv *s = opaque;
343 bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size);
347 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
349 QEMUFileBdrv *s = opaque;
350 return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
353 static int bdrv_fclose(void *opaque)
355 QEMUFileBdrv *s = opaque;
360 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
364 s = qemu_mallocz(sizeof(QEMUFileBdrv));
367 s->base_offset = offset;
370 return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
372 return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
375 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
376 QEMUFileGetBufferFunc *get_buffer,
377 QEMUFileCloseFunc *close,
378 QEMUFileRateLimit *rate_limit,
379 QEMUFileSetRateLimit *set_rate_limit)
383 f = qemu_mallocz(sizeof(QEMUFile));
386 f->put_buffer = put_buffer;
387 f->get_buffer = get_buffer;
389 f->rate_limit = rate_limit;
390 f->set_rate_limit = set_rate_limit;
396 int qemu_file_has_error(QEMUFile *f)
401 void qemu_file_set_error(QEMUFile *f)
406 void qemu_fflush(QEMUFile *f)
411 if (f->is_write && f->buf_index > 0) {
414 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
416 f->buf_offset += f->buf_index;
423 static void qemu_fill_buffer(QEMUFile *f)
433 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
437 f->buf_offset += len;
438 } else if (len != -EAGAIN)
442 int qemu_fclose(QEMUFile *f)
447 ret = f->close(f->opaque);
452 void qemu_file_put_notify(QEMUFile *f)
454 f->put_buffer(f->opaque, NULL, 0, 0);
457 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
461 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
463 "Attempted to write to buffer while read buffer is not empty\n");
467 while (!f->has_error && size > 0) {
468 l = IO_BUF_SIZE - f->buf_index;
471 memcpy(f->buf + f->buf_index, buf, l);
476 if (f->buf_index >= IO_BUF_SIZE)
481 void qemu_put_byte(QEMUFile *f, int v)
483 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
485 "Attempted to write to buffer while read buffer is not empty\n");
489 f->buf[f->buf_index++] = v;
491 if (f->buf_index >= IO_BUF_SIZE)
495 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
504 l = f->buf_size - f->buf_index;
507 l = f->buf_size - f->buf_index;
513 memcpy(buf, f->buf + f->buf_index, l);
521 int qemu_get_byte(QEMUFile *f)
526 if (f->buf_index >= f->buf_size) {
528 if (f->buf_index >= f->buf_size)
531 return f->buf[f->buf_index++];
534 int64_t qemu_ftell(QEMUFile *f)
536 return f->buf_offset - f->buf_size + f->buf_index;
539 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
541 if (whence == SEEK_SET) {
543 } else if (whence == SEEK_CUR) {
544 pos += qemu_ftell(f);
546 /* SEEK_END not supported */
560 int qemu_file_rate_limit(QEMUFile *f)
563 return f->rate_limit(f->opaque);
568 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
570 if (f->set_rate_limit)
571 return f->set_rate_limit(f->opaque, new_rate);
576 void qemu_put_be16(QEMUFile *f, unsigned int v)
578 qemu_put_byte(f, v >> 8);
582 void qemu_put_be32(QEMUFile *f, unsigned int v)
584 qemu_put_byte(f, v >> 24);
585 qemu_put_byte(f, v >> 16);
586 qemu_put_byte(f, v >> 8);
590 void qemu_put_be64(QEMUFile *f, uint64_t v)
592 qemu_put_be32(f, v >> 32);
596 unsigned int qemu_get_be16(QEMUFile *f)
599 v = qemu_get_byte(f) << 8;
600 v |= qemu_get_byte(f);
604 unsigned int qemu_get_be32(QEMUFile *f)
607 v = qemu_get_byte(f) << 24;
608 v |= qemu_get_byte(f) << 16;
609 v |= qemu_get_byte(f) << 8;
610 v |= qemu_get_byte(f);
614 uint64_t qemu_get_be64(QEMUFile *f)
617 v = (uint64_t)qemu_get_be32(f) << 32;
618 v |= qemu_get_be32(f);
622 typedef struct SaveStateEntry {
627 SaveLiveStateHandler *save_live_state;
628 SaveStateHandler *save_state;
629 LoadStateHandler *load_state;
631 struct SaveStateEntry *next;
634 static SaveStateEntry *first_se;
636 /* TODO: Individual devices generally have very little idea about the rest
637 of the system, so instance_id should be removed/replaced.
638 Meanwhile pass -1 as instance_id if you do not already have a clearly
639 distinguishing id for all instances of your device class. */
640 int register_savevm_live(const char *idstr,
643 SaveLiveStateHandler *save_live_state,
644 SaveStateHandler *save_state,
645 LoadStateHandler *load_state,
648 SaveStateEntry *se, **pse;
649 static int global_section_id;
651 se = qemu_malloc(sizeof(SaveStateEntry));
652 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
653 se->instance_id = (instance_id == -1) ? 0 : instance_id;
654 se->version_id = version_id;
655 se->section_id = global_section_id++;
656 se->save_live_state = save_live_state;
657 se->save_state = save_state;
658 se->load_state = load_state;
662 /* add at the end of list */
664 while (*pse != NULL) {
665 if (instance_id == -1
666 && strcmp(se->idstr, (*pse)->idstr) == 0
667 && se->instance_id <= (*pse)->instance_id)
668 se->instance_id = (*pse)->instance_id + 1;
675 int register_savevm(const char *idstr,
678 SaveStateHandler *save_state,
679 LoadStateHandler *load_state,
682 return register_savevm_live(idstr, instance_id, version_id,
683 NULL, save_state, load_state, opaque);
686 void unregister_savevm(const char *idstr, void *opaque)
688 SaveStateEntry **pse;
691 while (*pse != NULL) {
692 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
693 SaveStateEntry *next = (*pse)->next;
702 #define QEMU_VM_FILE_MAGIC 0x5145564d
703 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
704 #define QEMU_VM_FILE_VERSION 0x00000003
706 #define QEMU_VM_EOF 0x00
707 #define QEMU_VM_SECTION_START 0x01
708 #define QEMU_VM_SECTION_PART 0x02
709 #define QEMU_VM_SECTION_END 0x03
710 #define QEMU_VM_SECTION_FULL 0x04
712 int qemu_savevm_state_begin(QEMUFile *f)
716 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
717 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
719 for (se = first_se; se != NULL; se = se->next) {
722 if (se->save_live_state == NULL)
726 qemu_put_byte(f, QEMU_VM_SECTION_START);
727 qemu_put_be32(f, se->section_id);
730 len = strlen(se->idstr);
731 qemu_put_byte(f, len);
732 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
734 qemu_put_be32(f, se->instance_id);
735 qemu_put_be32(f, se->version_id);
737 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
740 if (qemu_file_has_error(f))
746 int qemu_savevm_state_iterate(QEMUFile *f)
751 for (se = first_se; se != NULL; se = se->next) {
752 if (se->save_live_state == NULL)
756 qemu_put_byte(f, QEMU_VM_SECTION_PART);
757 qemu_put_be32(f, se->section_id);
759 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
765 if (qemu_file_has_error(f))
771 int qemu_savevm_state_complete(QEMUFile *f)
775 for (se = first_se; se != NULL; se = se->next) {
776 if (se->save_live_state == NULL)
780 qemu_put_byte(f, QEMU_VM_SECTION_END);
781 qemu_put_be32(f, se->section_id);
783 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
786 for(se = first_se; se != NULL; se = se->next) {
789 if (se->save_state == NULL)
793 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
794 qemu_put_be32(f, se->section_id);
797 len = strlen(se->idstr);
798 qemu_put_byte(f, len);
799 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
801 qemu_put_be32(f, se->instance_id);
802 qemu_put_be32(f, se->version_id);
804 se->save_state(f, se->opaque);
807 qemu_put_byte(f, QEMU_VM_EOF);
809 if (qemu_file_has_error(f))
815 int qemu_savevm_state(QEMUFile *f)
817 int saved_vm_running;
820 saved_vm_running = vm_running;
825 ret = qemu_savevm_state_begin(f);
830 ret = qemu_savevm_state_iterate(f);
835 ret = qemu_savevm_state_complete(f);
838 if (qemu_file_has_error(f))
841 if (!ret && saved_vm_running)
847 static SaveStateEntry *find_se(const char *idstr, int instance_id)
851 for(se = first_se; se != NULL; se = se->next) {
852 if (!strcmp(se->idstr, idstr) &&
853 instance_id == se->instance_id)
859 typedef struct LoadStateEntry {
863 struct LoadStateEntry *next;
866 static int qemu_loadvm_state_v2(QEMUFile *f)
869 int len, ret, instance_id, record_len, version_id;
870 int64_t total_len, end_pos, cur_pos;
873 total_len = qemu_get_be64(f);
874 end_pos = total_len + qemu_ftell(f);
876 if (qemu_ftell(f) >= end_pos)
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);
883 record_len = qemu_get_be32(f);
884 cur_pos = qemu_ftell(f);
885 se = find_se(idstr, instance_id);
887 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
890 ret = se->load_state(f, se->opaque, version_id);
892 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
897 /* always seek to exact end of record */
898 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
901 if (qemu_file_has_error(f))
907 int qemu_loadvm_state(QEMUFile *f)
909 LoadStateEntry *first_le = NULL;
910 uint8_t section_type;
914 v = qemu_get_be32(f);
915 if (v != QEMU_VM_FILE_MAGIC)
918 v = qemu_get_be32(f);
919 if (v == QEMU_VM_FILE_VERSION_COMPAT)
920 return qemu_loadvm_state_v2(f);
921 if (v != QEMU_VM_FILE_VERSION)
924 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
925 uint32_t instance_id, version_id, section_id;
931 switch (section_type) {
932 case QEMU_VM_SECTION_START:
933 case QEMU_VM_SECTION_FULL:
934 /* Read section start */
935 section_id = qemu_get_be32(f);
936 len = qemu_get_byte(f);
937 qemu_get_buffer(f, (uint8_t *)idstr, len);
939 instance_id = qemu_get_be32(f);
940 version_id = qemu_get_be32(f);
942 /* Find savevm section */
943 se = find_se(idstr, instance_id);
945 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
950 /* Validate version */
951 if (version_id > se->version_id) {
952 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
953 version_id, idstr, se->version_id);
959 le = qemu_mallocz(sizeof(*le));
962 le->section_id = section_id;
963 le->version_id = version_id;
967 le->se->load_state(f, le->se->opaque, le->version_id);
969 case QEMU_VM_SECTION_PART:
970 case QEMU_VM_SECTION_END:
971 section_id = qemu_get_be32(f);
973 for (le = first_le; le && le->section_id != section_id; le = le->next);
975 fprintf(stderr, "Unknown savevm section %d\n", section_id);
980 le->se->load_state(f, le->se->opaque, le->version_id);
983 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
993 LoadStateEntry *le = first_le;
994 first_le = first_le->next;
998 if (qemu_file_has_error(f))
1004 /* device can contain snapshots */
1005 static int bdrv_can_snapshot(BlockDriverState *bs)
1008 !bdrv_is_removable(bs) &&
1009 !bdrv_is_read_only(bs));
1012 /* device must be snapshots in order to have a reliable snapshot */
1013 static int bdrv_has_snapshot(BlockDriverState *bs)
1016 !bdrv_is_removable(bs) &&
1017 !bdrv_is_read_only(bs));
1020 static BlockDriverState *get_bs_snapshots(void)
1022 BlockDriverState *bs;
1026 return bs_snapshots;
1027 for(i = 0; i <= nb_drives; i++) {
1028 bs = drives_table[i].bdrv;
1029 if (bdrv_can_snapshot(bs))
1038 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1041 QEMUSnapshotInfo *sn_tab, *sn;
1045 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1048 for(i = 0; i < nb_sns; i++) {
1050 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1060 void do_savevm(Monitor *mon, const char *name)
1062 BlockDriverState *bs, *bs1;
1063 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1064 int must_delete, ret, i;
1065 BlockDriverInfo bdi1, *bdi = &bdi1;
1067 int saved_vm_running;
1068 uint32_t vm_state_size;
1075 bs = get_bs_snapshots();
1077 monitor_printf(mon, "No block device can accept snapshots\n");
1081 /* ??? Should this occur after vm_stop? */
1084 saved_vm_running = vm_running;
1089 ret = bdrv_snapshot_find(bs, old_sn, name);
1094 memset(sn, 0, sizeof(*sn));
1096 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1097 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1100 pstrcpy(sn->name, sizeof(sn->name), name);
1103 /* fill auxiliary fields */
1106 sn->date_sec = tb.time;
1107 sn->date_nsec = tb.millitm * 1000000;
1109 gettimeofday(&tv, NULL);
1110 sn->date_sec = tv.tv_sec;
1111 sn->date_nsec = tv.tv_usec * 1000;
1113 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1115 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1116 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1117 bdrv_get_device_name(bs));
1121 /* save the VM state */
1122 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
1124 monitor_printf(mon, "Could not open VM state file\n");
1127 ret = qemu_savevm_state(f);
1128 vm_state_size = qemu_ftell(f);
1131 monitor_printf(mon, "Error %d while writing VM\n", ret);
1135 /* create the snapshots */
1137 for(i = 0; i < nb_drives; i++) {
1138 bs1 = drives_table[i].bdrv;
1139 if (bdrv_has_snapshot(bs1)) {
1141 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1144 "Error while deleting snapshot on '%s'\n",
1145 bdrv_get_device_name(bs1));
1148 /* Write VM state size only to the image that contains the state */
1149 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1150 ret = bdrv_snapshot_create(bs1, sn);
1152 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1153 bdrv_get_device_name(bs1));
1159 if (saved_vm_running)
1163 void do_loadvm(Monitor *mon, const char *name)
1165 BlockDriverState *bs, *bs1;
1166 BlockDriverInfo bdi1, *bdi = &bdi1;
1167 QEMUSnapshotInfo sn;
1170 int saved_vm_running;
1172 bs = get_bs_snapshots();
1174 monitor_printf(mon, "No block device supports snapshots\n");
1178 /* Flush all IO requests so they don't interfere with the new state. */
1181 saved_vm_running = vm_running;
1184 for(i = 0; i <= nb_drives; i++) {
1185 bs1 = drives_table[i].bdrv;
1186 if (bdrv_has_snapshot(bs1)) {
1187 ret = bdrv_snapshot_goto(bs1, name);
1190 monitor_printf(mon, "Warning: ");
1194 "Snapshots not supported on device '%s'\n",
1195 bdrv_get_device_name(bs1));
1198 monitor_printf(mon, "Could not find snapshot '%s' on "
1200 name, bdrv_get_device_name(bs1));
1203 monitor_printf(mon, "Error %d while activating snapshot on"
1204 " '%s'\n", ret, bdrv_get_device_name(bs1));
1207 /* fatal on snapshot block device */
1214 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1215 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1216 bdrv_get_device_name(bs));
1220 /* Don't even try to load empty VM states */
1221 ret = bdrv_snapshot_find(bs, &sn, name);
1222 if ((ret >= 0) && (sn.vm_state_size == 0))
1225 /* restore the VM state */
1226 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
1228 monitor_printf(mon, "Could not open VM state file\n");
1231 ret = qemu_loadvm_state(f);
1234 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1237 if (saved_vm_running)
1241 void do_delvm(Monitor *mon, const char *name)
1243 BlockDriverState *bs, *bs1;
1246 bs = get_bs_snapshots();
1248 monitor_printf(mon, "No block device supports snapshots\n");
1252 for(i = 0; i <= nb_drives; i++) {
1253 bs1 = drives_table[i].bdrv;
1254 if (bdrv_has_snapshot(bs1)) {
1255 ret = bdrv_snapshot_delete(bs1, name);
1257 if (ret == -ENOTSUP)
1259 "Snapshots not supported on device '%s'\n",
1260 bdrv_get_device_name(bs1));
1262 monitor_printf(mon, "Error %d while deleting snapshot on "
1263 "'%s'\n", ret, bdrv_get_device_name(bs1));
1269 void do_info_snapshots(Monitor *mon)
1271 BlockDriverState *bs, *bs1;
1272 QEMUSnapshotInfo *sn_tab, *sn;
1276 bs = get_bs_snapshots();
1278 monitor_printf(mon, "No available block device supports snapshots\n");
1281 monitor_printf(mon, "Snapshot devices:");
1282 for(i = 0; i <= nb_drives; i++) {
1283 bs1 = drives_table[i].bdrv;
1284 if (bdrv_has_snapshot(bs1)) {
1286 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1289 monitor_printf(mon, "\n");
1291 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1293 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1296 monitor_printf(mon, "Snapshot list (from %s):\n",
1297 bdrv_get_device_name(bs));
1298 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1299 for(i = 0; i < nb_sns; i++) {
1301 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));