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 static int block_put_buffer(void *opaque, const uint8_t *buf,
341 int64_t pos, int size)
343 bdrv_save_vmstate(opaque, buf, pos, size);
347 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
349 return bdrv_load_vmstate(opaque, buf, pos, size);
352 static int bdrv_fclose(void *opaque)
357 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
360 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
361 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
364 QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
365 QEMUFileGetBufferFunc *get_buffer,
366 QEMUFileCloseFunc *close,
367 QEMUFileRateLimit *rate_limit,
368 QEMUFileSetRateLimit *set_rate_limit)
372 f = qemu_mallocz(sizeof(QEMUFile));
375 f->put_buffer = put_buffer;
376 f->get_buffer = get_buffer;
378 f->rate_limit = rate_limit;
379 f->set_rate_limit = set_rate_limit;
385 int qemu_file_has_error(QEMUFile *f)
390 void qemu_file_set_error(QEMUFile *f)
395 void qemu_fflush(QEMUFile *f)
400 if (f->is_write && f->buf_index > 0) {
403 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
405 f->buf_offset += f->buf_index;
412 static void qemu_fill_buffer(QEMUFile *f)
422 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
426 f->buf_offset += len;
427 } else if (len != -EAGAIN)
431 int qemu_fclose(QEMUFile *f)
436 ret = f->close(f->opaque);
441 void qemu_file_put_notify(QEMUFile *f)
443 f->put_buffer(f->opaque, NULL, 0, 0);
446 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
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 while (!f->has_error && size > 0) {
457 l = IO_BUF_SIZE - f->buf_index;
460 memcpy(f->buf + f->buf_index, buf, l);
465 if (f->buf_index >= IO_BUF_SIZE)
470 void qemu_put_byte(QEMUFile *f, int v)
472 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
474 "Attempted to write to buffer while read buffer is not empty\n");
478 f->buf[f->buf_index++] = v;
480 if (f->buf_index >= IO_BUF_SIZE)
484 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
493 l = f->buf_size - f->buf_index;
496 l = f->buf_size - f->buf_index;
502 memcpy(buf, f->buf + f->buf_index, l);
510 int qemu_get_byte(QEMUFile *f)
515 if (f->buf_index >= f->buf_size) {
517 if (f->buf_index >= f->buf_size)
520 return f->buf[f->buf_index++];
523 int64_t qemu_ftell(QEMUFile *f)
525 return f->buf_offset - f->buf_size + f->buf_index;
528 int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
530 if (whence == SEEK_SET) {
532 } else if (whence == SEEK_CUR) {
533 pos += qemu_ftell(f);
535 /* SEEK_END not supported */
549 int qemu_file_rate_limit(QEMUFile *f)
552 return f->rate_limit(f->opaque);
557 size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
559 if (f->set_rate_limit)
560 return f->set_rate_limit(f->opaque, new_rate);
565 void qemu_put_be16(QEMUFile *f, unsigned int v)
567 qemu_put_byte(f, v >> 8);
571 void qemu_put_be32(QEMUFile *f, unsigned int v)
573 qemu_put_byte(f, v >> 24);
574 qemu_put_byte(f, v >> 16);
575 qemu_put_byte(f, v >> 8);
579 void qemu_put_be64(QEMUFile *f, uint64_t v)
581 qemu_put_be32(f, v >> 32);
585 unsigned int qemu_get_be16(QEMUFile *f)
588 v = qemu_get_byte(f) << 8;
589 v |= qemu_get_byte(f);
593 unsigned int qemu_get_be32(QEMUFile *f)
596 v = qemu_get_byte(f) << 24;
597 v |= qemu_get_byte(f) << 16;
598 v |= qemu_get_byte(f) << 8;
599 v |= qemu_get_byte(f);
603 uint64_t qemu_get_be64(QEMUFile *f)
606 v = (uint64_t)qemu_get_be32(f) << 32;
607 v |= qemu_get_be32(f);
611 typedef struct SaveStateEntry {
616 SaveLiveStateHandler *save_live_state;
617 SaveStateHandler *save_state;
618 LoadStateHandler *load_state;
620 struct SaveStateEntry *next;
623 static SaveStateEntry *first_se;
625 /* TODO: Individual devices generally have very little idea about the rest
626 of the system, so instance_id should be removed/replaced.
627 Meanwhile pass -1 as instance_id if you do not already have a clearly
628 distinguishing id for all instances of your device class. */
629 int register_savevm_live(const char *idstr,
632 SaveLiveStateHandler *save_live_state,
633 SaveStateHandler *save_state,
634 LoadStateHandler *load_state,
637 SaveStateEntry *se, **pse;
638 static int global_section_id;
640 se = qemu_malloc(sizeof(SaveStateEntry));
641 pstrcpy(se->idstr, sizeof(se->idstr), idstr);
642 se->instance_id = (instance_id == -1) ? 0 : instance_id;
643 se->version_id = version_id;
644 se->section_id = global_section_id++;
645 se->save_live_state = save_live_state;
646 se->save_state = save_state;
647 se->load_state = load_state;
651 /* add at the end of list */
653 while (*pse != NULL) {
654 if (instance_id == -1
655 && strcmp(se->idstr, (*pse)->idstr) == 0
656 && se->instance_id <= (*pse)->instance_id)
657 se->instance_id = (*pse)->instance_id + 1;
664 int register_savevm(const char *idstr,
667 SaveStateHandler *save_state,
668 LoadStateHandler *load_state,
671 return register_savevm_live(idstr, instance_id, version_id,
672 NULL, save_state, load_state, opaque);
675 void unregister_savevm(const char *idstr, void *opaque)
677 SaveStateEntry **pse;
680 while (*pse != NULL) {
681 if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) {
682 SaveStateEntry *next = (*pse)->next;
691 #define QEMU_VM_FILE_MAGIC 0x5145564d
692 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
693 #define QEMU_VM_FILE_VERSION 0x00000003
695 #define QEMU_VM_EOF 0x00
696 #define QEMU_VM_SECTION_START 0x01
697 #define QEMU_VM_SECTION_PART 0x02
698 #define QEMU_VM_SECTION_END 0x03
699 #define QEMU_VM_SECTION_FULL 0x04
701 int qemu_savevm_state_begin(QEMUFile *f)
705 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
706 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
708 for (se = first_se; se != NULL; se = se->next) {
711 if (se->save_live_state == NULL)
715 qemu_put_byte(f, QEMU_VM_SECTION_START);
716 qemu_put_be32(f, se->section_id);
719 len = strlen(se->idstr);
720 qemu_put_byte(f, len);
721 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
723 qemu_put_be32(f, se->instance_id);
724 qemu_put_be32(f, se->version_id);
726 se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
729 if (qemu_file_has_error(f))
735 int qemu_savevm_state_iterate(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_PART);
746 qemu_put_be32(f, se->section_id);
748 ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
754 if (qemu_file_has_error(f))
760 int qemu_savevm_state_complete(QEMUFile *f)
764 for (se = first_se; se != NULL; se = se->next) {
765 if (se->save_live_state == NULL)
769 qemu_put_byte(f, QEMU_VM_SECTION_END);
770 qemu_put_be32(f, se->section_id);
772 se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
775 for(se = first_se; se != NULL; se = se->next) {
778 if (se->save_state == NULL)
782 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
783 qemu_put_be32(f, se->section_id);
786 len = strlen(se->idstr);
787 qemu_put_byte(f, len);
788 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
790 qemu_put_be32(f, se->instance_id);
791 qemu_put_be32(f, se->version_id);
793 se->save_state(f, se->opaque);
796 qemu_put_byte(f, QEMU_VM_EOF);
798 if (qemu_file_has_error(f))
804 int qemu_savevm_state(QEMUFile *f)
806 int saved_vm_running;
809 saved_vm_running = vm_running;
814 ret = qemu_savevm_state_begin(f);
819 ret = qemu_savevm_state_iterate(f);
824 ret = qemu_savevm_state_complete(f);
827 if (qemu_file_has_error(f))
830 if (!ret && saved_vm_running)
836 static SaveStateEntry *find_se(const char *idstr, int instance_id)
840 for(se = first_se; se != NULL; se = se->next) {
841 if (!strcmp(se->idstr, idstr) &&
842 instance_id == se->instance_id)
848 typedef struct LoadStateEntry {
852 struct LoadStateEntry *next;
855 static int qemu_loadvm_state_v2(QEMUFile *f)
858 int len, ret, instance_id, record_len, version_id;
859 int64_t total_len, end_pos, cur_pos;
862 total_len = qemu_get_be64(f);
863 end_pos = total_len + qemu_ftell(f);
865 if (qemu_ftell(f) >= end_pos)
867 len = qemu_get_byte(f);
868 qemu_get_buffer(f, (uint8_t *)idstr, len);
870 instance_id = qemu_get_be32(f);
871 version_id = qemu_get_be32(f);
872 record_len = qemu_get_be32(f);
873 cur_pos = qemu_ftell(f);
874 se = find_se(idstr, instance_id);
876 fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
879 ret = se->load_state(f, se->opaque, version_id);
881 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
886 /* always seek to exact end of record */
887 qemu_fseek(f, cur_pos + record_len, SEEK_SET);
890 if (qemu_file_has_error(f))
896 int qemu_loadvm_state(QEMUFile *f)
898 LoadStateEntry *first_le = NULL;
899 uint8_t section_type;
903 v = qemu_get_be32(f);
904 if (v != QEMU_VM_FILE_MAGIC)
907 v = qemu_get_be32(f);
908 if (v == QEMU_VM_FILE_VERSION_COMPAT)
909 return qemu_loadvm_state_v2(f);
910 if (v != QEMU_VM_FILE_VERSION)
913 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
914 uint32_t instance_id, version_id, section_id;
920 switch (section_type) {
921 case QEMU_VM_SECTION_START:
922 case QEMU_VM_SECTION_FULL:
923 /* Read section start */
924 section_id = qemu_get_be32(f);
925 len = qemu_get_byte(f);
926 qemu_get_buffer(f, (uint8_t *)idstr, len);
928 instance_id = qemu_get_be32(f);
929 version_id = qemu_get_be32(f);
931 /* Find savevm section */
932 se = find_se(idstr, instance_id);
934 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
939 /* Validate version */
940 if (version_id > se->version_id) {
941 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
942 version_id, idstr, se->version_id);
948 le = qemu_mallocz(sizeof(*le));
951 le->section_id = section_id;
952 le->version_id = version_id;
956 le->se->load_state(f, le->se->opaque, le->version_id);
958 case QEMU_VM_SECTION_PART:
959 case QEMU_VM_SECTION_END:
960 section_id = qemu_get_be32(f);
962 for (le = first_le; le && le->section_id != section_id; le = le->next);
964 fprintf(stderr, "Unknown savevm section %d\n", section_id);
969 le->se->load_state(f, le->se->opaque, le->version_id);
972 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
982 LoadStateEntry *le = first_le;
983 first_le = first_le->next;
987 if (qemu_file_has_error(f))
993 /* device can contain snapshots */
994 static int bdrv_can_snapshot(BlockDriverState *bs)
997 !bdrv_is_removable(bs) &&
998 !bdrv_is_read_only(bs));
1001 /* device must be snapshots in order to have a reliable snapshot */
1002 static int bdrv_has_snapshot(BlockDriverState *bs)
1005 !bdrv_is_removable(bs) &&
1006 !bdrv_is_read_only(bs));
1009 static BlockDriverState *get_bs_snapshots(void)
1011 BlockDriverState *bs;
1015 return bs_snapshots;
1016 for(i = 0; i <= nb_drives; i++) {
1017 bs = drives_table[i].bdrv;
1018 if (bdrv_can_snapshot(bs))
1027 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1030 QEMUSnapshotInfo *sn_tab, *sn;
1034 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1037 for(i = 0; i < nb_sns; i++) {
1039 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1049 void do_savevm(Monitor *mon, const char *name)
1051 BlockDriverState *bs, *bs1;
1052 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
1053 int must_delete, ret, i;
1055 int saved_vm_running;
1056 uint32_t vm_state_size;
1063 bs = get_bs_snapshots();
1065 monitor_printf(mon, "No block device can accept snapshots\n");
1069 /* ??? Should this occur after vm_stop? */
1072 saved_vm_running = vm_running;
1077 ret = bdrv_snapshot_find(bs, old_sn, name);
1082 memset(sn, 0, sizeof(*sn));
1084 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1085 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1088 pstrcpy(sn->name, sizeof(sn->name), name);
1091 /* fill auxiliary fields */
1094 sn->date_sec = tb.time;
1095 sn->date_nsec = tb.millitm * 1000000;
1097 gettimeofday(&tv, NULL);
1098 sn->date_sec = tv.tv_sec;
1099 sn->date_nsec = tv.tv_usec * 1000;
1101 sn->vm_clock_nsec = qemu_get_clock(vm_clock);
1103 /* save the VM state */
1104 f = qemu_fopen_bdrv(bs, 1);
1106 monitor_printf(mon, "Could not open VM state file\n");
1109 ret = qemu_savevm_state(f);
1110 vm_state_size = qemu_ftell(f);
1113 monitor_printf(mon, "Error %d while writing VM\n", ret);
1117 /* create the snapshots */
1119 for(i = 0; i < nb_drives; i++) {
1120 bs1 = drives_table[i].bdrv;
1121 if (bdrv_has_snapshot(bs1)) {
1123 ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
1126 "Error while deleting snapshot on '%s'\n",
1127 bdrv_get_device_name(bs1));
1130 /* Write VM state size only to the image that contains the state */
1131 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
1132 ret = bdrv_snapshot_create(bs1, sn);
1134 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1135 bdrv_get_device_name(bs1));
1141 if (saved_vm_running)
1145 void do_loadvm(Monitor *mon, const char *name)
1147 BlockDriverState *bs, *bs1;
1148 QEMUSnapshotInfo sn;
1151 int saved_vm_running;
1153 bs = get_bs_snapshots();
1155 monitor_printf(mon, "No block device supports snapshots\n");
1159 /* Flush all IO requests so they don't interfere with the new state. */
1162 saved_vm_running = vm_running;
1165 for(i = 0; i <= nb_drives; i++) {
1166 bs1 = drives_table[i].bdrv;
1167 if (bdrv_has_snapshot(bs1)) {
1168 ret = bdrv_snapshot_goto(bs1, name);
1171 monitor_printf(mon, "Warning: ");
1175 "Snapshots not supported on device '%s'\n",
1176 bdrv_get_device_name(bs1));
1179 monitor_printf(mon, "Could not find snapshot '%s' on "
1181 name, bdrv_get_device_name(bs1));
1184 monitor_printf(mon, "Error %d while activating snapshot on"
1185 " '%s'\n", ret, bdrv_get_device_name(bs1));
1188 /* fatal on snapshot block device */
1195 /* Don't even try to load empty VM states */
1196 ret = bdrv_snapshot_find(bs, &sn, name);
1197 if ((ret >= 0) && (sn.vm_state_size == 0))
1200 /* restore the VM state */
1201 f = qemu_fopen_bdrv(bs, 0);
1203 monitor_printf(mon, "Could not open VM state file\n");
1206 ret = qemu_loadvm_state(f);
1209 monitor_printf(mon, "Error %d while loading VM state\n", ret);
1212 if (saved_vm_running)
1216 void do_delvm(Monitor *mon, const char *name)
1218 BlockDriverState *bs, *bs1;
1221 bs = get_bs_snapshots();
1223 monitor_printf(mon, "No block device supports snapshots\n");
1227 for(i = 0; i <= nb_drives; i++) {
1228 bs1 = drives_table[i].bdrv;
1229 if (bdrv_has_snapshot(bs1)) {
1230 ret = bdrv_snapshot_delete(bs1, name);
1232 if (ret == -ENOTSUP)
1234 "Snapshots not supported on device '%s'\n",
1235 bdrv_get_device_name(bs1));
1237 monitor_printf(mon, "Error %d while deleting snapshot on "
1238 "'%s'\n", ret, bdrv_get_device_name(bs1));
1244 void do_info_snapshots(Monitor *mon)
1246 BlockDriverState *bs, *bs1;
1247 QEMUSnapshotInfo *sn_tab, *sn;
1251 bs = get_bs_snapshots();
1253 monitor_printf(mon, "No available block device supports snapshots\n");
1256 monitor_printf(mon, "Snapshot devices:");
1257 for(i = 0; i <= nb_drives; i++) {
1258 bs1 = drives_table[i].bdrv;
1259 if (bdrv_has_snapshot(bs1)) {
1261 monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
1264 monitor_printf(mon, "\n");
1266 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1268 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
1271 monitor_printf(mon, "Snapshot list (from %s):\n",
1272 bdrv_get_device_name(bs));
1273 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
1274 for(i = 0; i < nb_sns; i++) {
1276 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));