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
33 #include <sys/times.h>
37 #include <sys/ioctl.h>
38 #include <sys/resource.h>
39 #include <sys/socket.h>
40 #include <netinet/in.h>
42 #if defined(__NetBSD__)
43 #include <net/if_tap.h>
46 #include <linux/if_tun.h>
48 #include <arpa/inet.h>
51 #include <sys/select.h>
59 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
60 #include <freebsd/stdlib.h>
65 #include <linux/rtc.h>
72 #include <sys/timeb.h>
74 #define getopt_long_only getopt_long
75 #define memalign(align, size) malloc(size)
78 #include "qemu-common.h"
83 #include "qemu-timer.h"
84 #include "qemu-char.h"
86 #include "audio/audio.h"
87 #include "migration.h"
88 #include "qemu_socket.h"
90 /* point to the block driver where the snapshots are managed */
91 static BlockDriverState *bs_snapshots;
93 #define SELF_ANNOUNCE_ROUNDS 5
94 #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
95 //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
96 #define EXPERIMENTAL_MAGIC 0xf1f23f4f
98 static int announce_self_create(uint8_t *buf,
101 uint32_t magic = EXPERIMENTAL_MAGIC;
102 uint16_t proto = htons(ETH_P_EXPERIMENTAL);
104 /* FIXME: should we send a different packet (arp/rarp/ping)? */
106 memset(buf, 0xff, 6); /* h_dst */
107 memcpy(buf + 6, mac_addr, 6); /* h_src */
108 memcpy(buf + 12, &proto, 2); /* h_proto */
109 memcpy(buf + 14, &magic, 4); /* magic */
114 void qemu_announce_self(void)
121 for (i = 0; i < nb_nics; i++) {
122 len = announce_self_create(buf, nd_table[i].macaddr);
123 vlan = nd_table[i].vlan;
124 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
125 for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
126 vc->fd_read(vc->opaque, buf, len);
131 /***********************************************************/
132 /* savevm/loadvm support */
134 #define IO_BUF_SIZE 32768
137 QEMUFilePutBufferFunc *put_buffer;
138 QEMUFileGetBufferFunc *get_buffer;
139 QEMUFileCloseFunc *close;
140 QEMUFileRateLimit *rate_limit;
144 int64_t buf_offset; /* start of buffer when writing, end of buffer
147 int buf_size; /* 0 when writing */
148 uint8_t buf[IO_BUF_SIZE];
153 typedef struct QEMUFilePopen
159 typedef struct QEMUFileSocket
165 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
167 QEMUFileSocket *s = opaque;
171 len = recv(s->fd, buf, size, 0);
172 } while (len == -1 && socket_error() == EINTR);
175 len = -socket_error();
180 static int socket_close(void *opaque)
182 QEMUFileSocket *s = opaque;
187 static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
189 QEMUFilePopen *s = opaque;
190 return fwrite(buf, 1, size, s->popen_file);
193 static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
195 QEMUFilePopen *s = opaque;
196 return fread(buf, 1, size, s->popen_file);
199 static int popen_close(void *opaque)
201 QEMUFilePopen *s = opaque;
202 pclose(s->popen_file);
207 QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
211 if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
212 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
216 s = qemu_mallocz(sizeof(QEMUFilePopen));
218 s->popen_file = popen_file;
221 s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
223 s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
225 fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
229 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
233 popen_file = popen(command, mode);
234 if(popen_file == NULL) {
238 return qemu_popen(popen_file, mode);
241 QEMUFile *qemu_fopen_socket(int fd)
243 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
246 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
250 typedef struct QEMUFileStdio
255 static int file_put_buffer(void *opaque, const uint8_t *buf,
256 int64_t pos, int size)
258 QEMUFileStdio *s = opaque;
259 fseek(s->outfile, pos, SEEK_SET);
260 fwrite(buf, 1, size, s->outfile);
264 static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
266 QEMUFileStdio *s = opaque;
267 fseek(s->outfile, pos, SEEK_SET);
268 return fread(buf, 1, size, s->outfile);
271 static int file_close(void *opaque)
273 QEMUFileStdio *s = opaque;
279 QEMUFile *qemu_fopen(const char *filename, const char *mode)
283 s = qemu_mallocz(sizeof(QEMUFileStdio));
285 s->outfile = fopen(filename, mode);
289 if (!strcmp(mode, "wb"))
290 return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
291 else if (!strcmp(mode, "rb"))
292 return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
301 typedef struct QEMUFileBdrv
303 BlockDriverState *bs;
307 static int bdrv_put_buffer(void *opaque, const uint8_t *buf,
308 int64_t pos, int size)
310 QEMUFileBdrv *s = opaque;
311 bdrv_pwrite(s->bs, s->base_offset + pos, buf, size);
315 static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
317 QEMUFileBdrv *s = opaque;
318 return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
321 static int bdrv_fclose(void *opaque)
323 QEMUFileBdrv *s = opaque;
328 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
332 s = qemu_mallocz(sizeof(QEMUFileBdrv));
335 s->base_offset = offset;
338 return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL);
340 return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL);
343 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
344 QEMUFileGetBufferFunc *get_buffer,
345 QEMUFileCloseFunc *close,
346 QEMUFileRateLimit *rate_limit)
350 f = qemu_mallocz(sizeof(QEMUFile));
353 f->put_buffer = put_buffer;
354 f->get_buffer = get_buffer;
356 f->rate_limit = rate_limit;
362 int qemu_file_has_error(QEMUFile *f)
367 void qemu_fflush(QEMUFile *f)
372 if (f->is_write && f->buf_index > 0) {
375 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
377 f->buf_offset += f->buf_index;
384 static void qemu_fill_buffer(QEMUFile *f)
394 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
398 f->buf_offset += len;
399 } else if (len != -EAGAIN)
403 int qemu_fclose(QEMUFile *f)
408 ret = f->close(f->opaque);
413 void qemu_file_put_notify(QEMUFile *f)
415 f->put_buffer(f->opaque, NULL, 0, 0);
418 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
422 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
424 "Attempted to write to buffer while read buffer is not empty\n");
428 while (!f->has_error && size > 0) {
429 l = IO_BUF_SIZE - f->buf_index;
432 memcpy(f->buf + f->buf_index, buf, l);
437 if (f->buf_index >= IO_BUF_SIZE)
442 void qemu_put_byte(QEMUFile *f, int v)
444 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
446 "Attempted to write to buffer while read buffer is not empty\n");
450 f->buf[f->buf_index++] = v;
452 if (f->buf_index >= IO_BUF_SIZE)
456 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
465 l = f->buf_size - f->buf_index;
468 l = f->buf_size - f->buf_index;
474 memcpy(buf, f->buf + f->buf_index, l);
482 int qemu_get_byte(QEMUFile *f)
487 if (f->buf_index >= f->buf_size) {
489 if (f->buf_index >= f->buf_size)
492 return f->buf[f->buf_index++];
495 int64_t qemu_ftell(QEMUFile *f)
497 return f->buf_offset - f->buf_size + f->buf_index;
500 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
502 if (whence == SEEK_SET) {
504 } else if (whence == SEEK_CUR) {
505 pos += qemu_ftell(f);
507 /* SEEK_END not supported */
521 int qemu_file_rate_limit(QEMUFile *f)
524 return f->rate_limit(f->opaque);
529 void qemu_put_be16(QEMUFile *f, unsigned int v)
531 qemu_put_byte(f, v >> 8);
535 void qemu_put_be32(QEMUFile *f, unsigned int v)
537 qemu_put_byte(f, v >> 24);
538 qemu_put_byte(f, v >> 16);
539 qemu_put_byte(f, v >> 8);
543 void qemu_put_be64(QEMUFile *f, uint64_t v)
545 qemu_put_be32(f, v >> 32);
549 unsigned int qemu_get_be16(QEMUFile *f)
552 v = qemu_get_byte(f) << 8;
553 v |= qemu_get_byte(f);
557 unsigned int qemu_get_be32(QEMUFile *f)
560 v = qemu_get_byte(f) << 24;
561 v |= qemu_get_byte(f) << 16;
562 v |= qemu_get_byte(f) << 8;
563 v |= qemu_get_byte(f);
567 uint64_t qemu_get_be64(QEMUFile *f)
570 v = (uint64_t)qemu_get_be32(f) << 32;
571 v |= qemu_get_be32(f);
575 typedef struct SaveStateEntry {
580 SaveLiveStateHandler *save_live_state;
581 SaveStateHandler *save_state;
582 LoadStateHandler *load_state;
584 struct SaveStateEntry *next;
587 static SaveStateEntry *first_se;
589 /* TODO: Individual devices generally have very little idea about the rest
590 of the system, so instance_id should be removed/replaced.
591 Meanwhile pass -1 as instance_id if you do not already have a clearly
592 distinguishing id for all instances of your device class. */
593 int register_savevm_live(const char *idstr,
596 SaveLiveStateHandler *save_live_state,
597 SaveStateHandler *save_state,
598 LoadStateHandler *load_state,
601 SaveStateEntry *se, **pse;
602 static int global_section_id;
604 se = qemu_malloc(sizeof(SaveStateEntry));
605 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
606 se->instance_id = (instance_id == -1) ? 0 : instance_id;
607 se->version_id = version_id;
608 se->section_id = global_section_id++;
609 se->save_live_state = save_live_state;
610 se->save_state = save_state;
611 se->load_state = load_state;
615 /* add at the end of list */
617 while (*pse != NULL) {
618 if (instance_id == -1
619 && strcmp(se->idstr, (*pse)->idstr) == 0
620 && se->instance_id <= (*pse)->instance_id)
621 se->instance_id = (*pse)->instance_id + 1;
628 int register_savevm(const char *idstr,
631 SaveStateHandler *save_state,
632 LoadStateHandler *load_state,
635 return register_savevm_live(idstr, instance_id, version_id,
636 NULL, save_state, load_state, opaque);
639 #define QEMU_VM_FILE_MAGIC 0x5145564d
640 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
641 #define QEMU_VM_FILE_VERSION 0x00000003
643 #define QEMU_VM_EOF 0x00
644 #define QEMU_VM_SECTION_START 0x01
645 #define QEMU_VM_SECTION_PART 0x02
646 #define QEMU_VM_SECTION_END 0x03
647 #define QEMU_VM_SECTION_FULL 0x04
649 int qemu_savevm_state_begin(QEMUFile *f)
653 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
654 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
656 for (se = first_se; se != NULL; se = se->next) {
659 if (se->save_live_state == NULL)
663 qemu_put_byte(f, QEMU_VM_SECTION_START);
664 qemu_put_be32(f, se->section_id);
667 len = strlen(se->idstr);
668 qemu_put_byte(f, len);
669 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
671 qemu_put_be32(f, se->instance_id);
672 qemu_put_be32(f, se->version_id);
674 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
677 if (qemu_file_has_error(f))
683 int qemu_savevm_state_iterate(QEMUFile *f)
688 for (se = first_se; se != NULL; se = se->next) {
689 if (se->save_live_state == NULL)
693 qemu_put_byte(f, QEMU_VM_SECTION_PART);
694 qemu_put_be32(f, se->section_id);
696 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
702 if (qemu_file_has_error(f))
708 int qemu_savevm_state_complete(QEMUFile *f)
712 for (se = first_se; se != NULL; se = se->next) {
713 if (se->save_live_state == NULL)
717 qemu_put_byte(f, QEMU_VM_SECTION_END);
718 qemu_put_be32(f, se->section_id);
720 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
723 for(se = first_se; se != NULL; se = se->next) {
726 if (se->save_state == NULL)
730 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
731 qemu_put_be32(f, se->section_id);
734 len = strlen(se->idstr);
735 qemu_put_byte(f, len);
736 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
738 qemu_put_be32(f, se->instance_id);
739 qemu_put_be32(f, se->version_id);
741 se->save_state(f, se->opaque);
744 qemu_put_byte(f, QEMU_VM_EOF);
746 if (qemu_file_has_error(f))
752 int qemu_savevm_state(QEMUFile *f)
754 int saved_vm_running;
757 saved_vm_running = vm_running;
762 ret = qemu_savevm_state_begin(f);
767 ret = qemu_savevm_state_iterate(f);
772 ret = qemu_savevm_state_complete(f);
775 if (qemu_file_has_error(f))
778 if (!ret && saved_vm_running)
784 static SaveStateEntry *find_se(const char *idstr, int instance_id)
788 for(se = first_se; se != NULL; se = se->next) {
789 if (!strcmp(se->idstr, idstr) &&
790 instance_id == se->instance_id)
796 typedef struct LoadStateEntry {
800 struct LoadStateEntry *next;
803 static int qemu_loadvm_state_v2(QEMUFile *f)
806 int len, ret, instance_id, record_len, version_id;
807 int64_t total_len, end_pos, cur_pos;
810 total_len = qemu_get_be64(f);
811 end_pos = total_len + qemu_ftell(f);
813 if (qemu_ftell(f) >= end_pos)
815 len = qemu_get_byte(f);
816 qemu_get_buffer(f, (uint8_t *)idstr, len);
818 instance_id = qemu_get_be32(f);
819 version_id = qemu_get_be32(f);
820 record_len = qemu_get_be32(f);
821 cur_pos = qemu_ftell(f);
822 se = find_se(idstr, instance_id);
824 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
827 ret = se->load_state(f, se->opaque, version_id);
829 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
833 /* always seek to exact end of record */
834 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
837 if (qemu_file_has_error(f))
843 int qemu_loadvm_state(QEMUFile *f)
845 LoadStateEntry *first_le = NULL;
846 uint8_t section_type;
850 v = qemu_get_be32(f);
851 if (v != QEMU_VM_FILE_MAGIC)
854 v = qemu_get_be32(f);
855 if (v == QEMU_VM_FILE_VERSION_COMPAT)
856 return qemu_loadvm_state_v2(f);
857 if (v != QEMU_VM_FILE_VERSION)
860 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
861 uint32_t instance_id, version_id, section_id;
867 switch (section_type) {
868 case QEMU_VM_SECTION_START:
869 case QEMU_VM_SECTION_FULL:
870 /* Read section start */
871 section_id = qemu_get_be32(f);
872 len = qemu_get_byte(f);
873 qemu_get_buffer(f, (uint8_t *)idstr, len);
875 instance_id = qemu_get_be32(f);
876 version_id = qemu_get_be32(f);
878 /* Find savevm section */
879 se = find_se(idstr, instance_id);
881 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
886 /* Validate version */
887 if (version_id > se->version_id) {
888 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
889 version_id, idstr, se->version_id);
895 le = qemu_mallocz(sizeof(*le));
898 le->section_id = section_id;
899 le->version_id = version_id;
903 le->se->load_state(f, le->se->opaque, le->version_id);
905 case QEMU_VM_SECTION_PART:
906 case QEMU_VM_SECTION_END:
907 section_id = qemu_get_be32(f);
909 for (le = first_le; le && le->section_id != section_id; le = le->next);
911 fprintf(stderr, "Unknown savevm section %d\n", section_id);
916 le->se->load_state(f, le->se->opaque, le->version_id);
919 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
929 LoadStateEntry *le = first_le;
930 first_le = first_le->next;
934 if (qemu_file_has_error(f))
940 /* device can contain snapshots */
941 static int bdrv_can_snapshot(BlockDriverState *bs)
944 !bdrv_is_removable(bs) &&
945 !bdrv_is_read_only(bs));
948 /* device must be snapshots in order to have a reliable snapshot */
949 static int bdrv_has_snapshot(BlockDriverState *bs)
952 !bdrv_is_removable(bs) &&
953 !bdrv_is_read_only(bs));
956 static BlockDriverState *get_bs_snapshots(void)
958 BlockDriverState *bs;
963 for(i = 0; i <= nb_drives; i++) {
964 bs = drives_table[i].bdrv;
965 if (bdrv_can_snapshot(bs))
974 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
977 QEMUSnapshotInfo *sn_tab, *sn;
981 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
984 for(i = 0; i < nb_sns; i++) {
986 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
996 void do_savevm(Monitor *mon, const char *name)
998 BlockDriverState *bs, *bs1;
999 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1000 int must_delete, ret, i;
1001 BlockDriverInfo bdi1, *bdi = &bdi1;
1003 int saved_vm_running;
1004 uint32_t vm_state_size;
1011 bs = get_bs_snapshots();
1013 monitor_printf(mon, "No block device can accept snapshots\n");
1017 /* ??? Should this occur after vm_stop? */
1020 saved_vm_running = vm_running;
1025 ret = bdrv_snapshot_find(bs, old_sn, name);
1030 memset(sn, 0, sizeof(*sn));
1032 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1033 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1036 pstrcpy(sn->name, sizeof(sn->name), name);
1039 /* fill auxiliary fields */
1042 sn->date_sec = tb.time;
1043 sn->date_nsec = tb.millitm * 1000000;
1045 gettimeofday(&tv, NULL);
1046 sn->date_sec = tv.tv_sec;
1047 sn->date_nsec = tv.tv_usec * 1000;
1049 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1051 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1052 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1053 bdrv_get_device_name(bs));
1057 /* save the VM state */
1058 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
1060 monitor_printf(mon, "Could not open VM state file\n");
1063 ret = qemu_savevm_state(f);
1064 vm_state_size = qemu_ftell(f);
1067 monitor_printf(mon, "Error %d while writing VM\n", ret);
1071 /* create the snapshots */
1073 for(i = 0; i < nb_drives; i++) {
1074 bs1 = drives_table[i].bdrv;
1075 if (bdrv_has_snapshot(bs1)) {
1077 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1080 "Error while deleting snapshot on '%s'\n",
1081 bdrv_get_device_name(bs1));
1084 /* Write VM state size only to the image that contains the state */
1085 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1086 ret = bdrv_snapshot_create(bs1, sn);
1088 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1089 bdrv_get_device_name(bs1));
1095 if (saved_vm_running)
1099 void do_loadvm(Monitor *mon, const char *name)
1101 BlockDriverState *bs, *bs1;
1102 BlockDriverInfo bdi1, *bdi = &bdi1;
1103 QEMUSnapshotInfo sn;
1106 int saved_vm_running;
1108 bs = get_bs_snapshots();
1110 monitor_printf(mon, "No block device supports snapshots\n");
1114 /* Flush all IO requests so they don't interfere with the new state. */
1117 saved_vm_running = vm_running;
1120 for(i = 0; i <= nb_drives; i++) {
1121 bs1 = drives_table[i].bdrv;
1122 if (bdrv_has_snapshot(bs1)) {
1123 ret = bdrv_snapshot_goto(bs1, name);
1126 monitor_printf(mon, "Warning: ");
1130 "Snapshots not supported on device '%s'\n",
1131 bdrv_get_device_name(bs1));
1134 monitor_printf(mon, "Could not find snapshot '%s' on "
1136 name, bdrv_get_device_name(bs1));
1139 monitor_printf(mon, "Error %d while activating snapshot on"
1140 " '%s'\n", ret, bdrv_get_device_name(bs1));
1143 /* fatal on snapshot block device */
1150 if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
1151 monitor_printf(mon, "Device %s does not support VM state snapshots\n",
1152 bdrv_get_device_name(bs));
1156 /* Don't even try to load empty VM states */
1157 ret = bdrv_snapshot_find(bs, &sn, name);
1158 if ((ret >= 0) && (sn.vm_state_size == 0))
1161 /* restore the VM state */
1162 f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
1164 monitor_printf(mon, "Could not open VM state file\n");
1167 ret = qemu_loadvm_state(f);
1170 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1173 if (saved_vm_running)
1177 void do_delvm(Monitor *mon, const char *name)
1179 BlockDriverState *bs, *bs1;
1182 bs = get_bs_snapshots();
1184 monitor_printf(mon, "No block device supports snapshots\n");
1188 for(i = 0; i <= nb_drives; i++) {
1189 bs1 = drives_table[i].bdrv;
1190 if (bdrv_has_snapshot(bs1)) {
1191 ret = bdrv_snapshot_delete(bs1, name);
1193 if (ret == -ENOTSUP)
1195 "Snapshots not supported on device '%s'\n",
1196 bdrv_get_device_name(bs1));
1198 monitor_printf(mon, "Error %d while deleting snapshot on "
1199 "'%s'\n", ret, bdrv_get_device_name(bs1));
1205 void do_info_snapshots(Monitor *mon)
1207 BlockDriverState *bs, *bs1;
1208 QEMUSnapshotInfo *sn_tab, *sn;
1212 bs = get_bs_snapshots();
1214 monitor_printf(mon, "No available block device supports snapshots\n");
1217 monitor_printf(mon, "Snapshot devices:");
1218 for(i = 0; i <= nb_drives; i++) {
1219 bs1 = drives_table[i].bdrv;
1220 if (bdrv_has_snapshot(bs1)) {
1222 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1225 monitor_printf(mon, "\n");
1227 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1229 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1232 monitor_printf(mon, "Snapshot list (from %s):\n",
1233 bdrv_get_device_name(bs));
1234 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1235 for(i = 0; i < nb_sns; i++) {
1237 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));