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
25 #include "config-host.h"
26 #include "qemu-common.h"
30 #include "monitor/monitor.h"
31 #include "sysemu/sysemu.h"
32 #include "qemu/timer.h"
33 #include "audio/audio.h"
34 #include "migration/migration.h"
35 #include "qemu/sockets.h"
36 #include "qemu/queue.h"
37 #include "sysemu/cpus.h"
38 #include "exec/memory.h"
39 #include "qmp-commands.h"
41 #include "qemu/bitops.h"
43 #define SELF_ANNOUNCE_ROUNDS 5
46 #define ETH_P_RARP 0x8035
48 #define ARP_HTYPE_ETH 0x0001
49 #define ARP_PTYPE_IP 0x0800
50 #define ARP_OP_REQUEST_REV 0x3
52 static int announce_self_create(uint8_t *buf,
55 /* Ethernet header. */
56 memset(buf, 0xff, 6); /* destination MAC addr */
57 memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
58 *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
61 *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
62 *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
63 *(buf + 18) = 6; /* hardware addr length (ethernet) */
64 *(buf + 19) = 4; /* protocol addr length (IPv4) */
65 *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
66 memcpy(buf + 22, mac_addr, 6); /* source hw addr */
67 memset(buf + 28, 0x00, 4); /* source protocol addr */
68 memcpy(buf + 32, mac_addr, 6); /* target hw addr */
69 memset(buf + 38, 0x00, 4); /* target protocol addr */
71 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
72 memset(buf + 42, 0x00, 18);
74 return 60; /* len (FCS will be added by hardware) */
77 static void qemu_announce_self_iter(NICState *nic, void *opaque)
82 len = announce_self_create(buf, nic->conf->macaddr.a);
84 qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
88 static void qemu_announce_self_once(void *opaque)
90 static int count = SELF_ANNOUNCE_ROUNDS;
91 QEMUTimer *timer = *(QEMUTimer **)opaque;
93 qemu_foreach_nic(qemu_announce_self_iter, NULL);
96 /* delay 50ms, 150ms, 250ms, ... */
97 qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
98 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
100 qemu_del_timer(timer);
101 qemu_free_timer(timer);
105 void qemu_announce_self(void)
107 static QEMUTimer *timer;
108 timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
109 qemu_announce_self_once(&timer);
112 /***********************************************************/
113 /* savevm/loadvm support */
115 #define IO_BUF_SIZE 32768
118 const QEMUFileOps *ops;
125 int64_t pos; /* start of buffer when writing, end of buffer
128 int buf_size; /* 0 when writing */
129 uint8_t buf[IO_BUF_SIZE];
134 typedef struct QEMUFileStdio
140 typedef struct QEMUFileSocket
151 static void fd_coroutine_enter(void *opaque)
153 FDYieldUntilData *data = opaque;
154 qemu_set_fd_handler(data->fd, NULL, NULL, NULL);
155 qemu_coroutine_enter(data->co, NULL);
159 * Yield until a file descriptor becomes readable
161 * Note that this function clobbers the handlers for the file descriptor.
163 static void coroutine_fn yield_until_fd_readable(int fd)
165 FDYieldUntilData data;
167 assert(qemu_in_coroutine());
168 data.co = qemu_coroutine_self();
170 qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
171 qemu_coroutine_yield();
174 static int socket_get_fd(void *opaque)
176 QEMUFileSocket *s = opaque;
181 static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
183 QEMUFileSocket *s = opaque;
187 len = qemu_recv(s->fd, buf, size, 0);
191 if (socket_error() == EAGAIN) {
192 yield_until_fd_readable(s->fd);
193 } else if (socket_error() != EINTR) {
199 len = -socket_error();
204 static int socket_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
206 QEMUFileSocket *s = opaque;
209 len = qemu_send_full(s->fd, buf, size, 0);
211 len = -socket_error();
216 static int socket_close(void *opaque)
218 QEMUFileSocket *s = opaque;
224 static int stdio_get_fd(void *opaque)
226 QEMUFileStdio *s = opaque;
228 return fileno(s->stdio_file);
231 static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
233 QEMUFileStdio *s = opaque;
234 return fwrite(buf, 1, size, s->stdio_file);
237 static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
239 QEMUFileStdio *s = opaque;
240 FILE *fp = s->stdio_file;
245 bytes = fread(buf, 1, size, fp);
246 if (bytes != 0 || !ferror(fp)) {
249 if (errno == EAGAIN) {
250 yield_until_fd_readable(fileno(fp));
251 } else if (errno != EINTR) {
258 static int stdio_pclose(void *opaque)
260 QEMUFileStdio *s = opaque;
262 ret = pclose(s->stdio_file);
265 } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
266 /* close succeeded, but non-zero exit code: */
267 ret = -EIO; /* fake errno value */
273 static int stdio_fclose(void *opaque)
275 QEMUFileStdio *s = opaque;
278 if (s->file->ops->put_buffer) {
279 int fd = fileno(s->stdio_file);
282 ret = fstat(fd, &st);
283 if (ret == 0 && S_ISREG(st.st_mode)) {
285 * If the file handle is a regular file make sure the
286 * data is flushed to disk before signaling success.
295 if (fclose(s->stdio_file) == EOF) {
302 static const QEMUFileOps stdio_pipe_read_ops = {
303 .get_fd = stdio_get_fd,
304 .get_buffer = stdio_get_buffer,
305 .close = stdio_pclose
308 static const QEMUFileOps stdio_pipe_write_ops = {
309 .get_fd = stdio_get_fd,
310 .put_buffer = stdio_put_buffer,
311 .close = stdio_pclose
314 QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
319 stdio_file = popen(command, mode);
320 if (stdio_file == NULL) {
324 if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
325 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
329 s = g_malloc0(sizeof(QEMUFileStdio));
331 s->stdio_file = stdio_file;
334 s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops);
336 s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops);
341 static const QEMUFileOps stdio_file_read_ops = {
342 .get_fd = stdio_get_fd,
343 .get_buffer = stdio_get_buffer,
344 .close = stdio_fclose
347 static const QEMUFileOps stdio_file_write_ops = {
348 .get_fd = stdio_get_fd,
349 .put_buffer = stdio_put_buffer,
350 .close = stdio_fclose
353 QEMUFile *qemu_fdopen(int fd, const char *mode)
358 (mode[0] != 'r' && mode[0] != 'w') ||
359 mode[1] != 'b' || mode[2] != 0) {
360 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
364 s = g_malloc0(sizeof(QEMUFileStdio));
365 s->stdio_file = fdopen(fd, mode);
370 s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
372 s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
381 static const QEMUFileOps socket_read_ops = {
382 .get_fd = socket_get_fd,
383 .get_buffer = socket_get_buffer,
384 .close = socket_close
387 static const QEMUFileOps socket_write_ops = {
388 .get_fd = socket_get_fd,
389 .put_buffer = socket_put_buffer,
390 .close = socket_close
393 QEMUFile *qemu_fopen_socket(int fd, const char *mode)
395 QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
398 (mode[0] != 'r' && mode[0] != 'w') ||
399 mode[1] != 'b' || mode[2] != 0) {
400 fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
405 if (mode[0] == 'w') {
406 socket_set_block(s->fd);
407 s->file = qemu_fopen_ops(s, &socket_write_ops);
409 s->file = qemu_fopen_ops(s, &socket_read_ops);
414 QEMUFile *qemu_fopen(const char *filename, const char *mode)
419 (mode[0] != 'r' && mode[0] != 'w') ||
420 mode[1] != 'b' || mode[2] != 0) {
421 fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
425 s = g_malloc0(sizeof(QEMUFileStdio));
427 s->stdio_file = fopen(filename, mode);
432 s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
434 s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
442 static int block_put_buffer(void *opaque, const uint8_t *buf,
443 int64_t pos, int size)
445 bdrv_save_vmstate(opaque, buf, pos, size);
449 static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
451 return bdrv_load_vmstate(opaque, buf, pos, size);
454 static int bdrv_fclose(void *opaque)
456 return bdrv_flush(opaque);
459 static const QEMUFileOps bdrv_read_ops = {
460 .get_buffer = block_get_buffer,
464 static const QEMUFileOps bdrv_write_ops = {
465 .put_buffer = block_put_buffer,
469 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
472 return qemu_fopen_ops(bs, &bdrv_write_ops);
473 return qemu_fopen_ops(bs, &bdrv_read_ops);
476 QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops)
480 f = g_malloc0(sizeof(QEMUFile));
488 int qemu_file_get_error(QEMUFile *f)
490 return f->last_error;
493 static void qemu_file_set_error(QEMUFile *f, int ret)
495 if (f->last_error == 0) {
500 /** Flushes QEMUFile buffer
503 static void qemu_fflush(QEMUFile *f)
507 if (!f->ops->put_buffer) {
510 if (f->is_write && f->buf_index > 0) {
511 ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
513 f->pos += f->buf_index;
518 qemu_file_set_error(f, ret);
522 static void qemu_fill_buffer(QEMUFile *f)
527 if (!f->ops->get_buffer)
533 pending = f->buf_size - f->buf_index;
535 memmove(f->buf, f->buf + f->buf_index, pending);
538 f->buf_size = pending;
540 len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos,
541 IO_BUF_SIZE - pending);
545 } else if (len == 0) {
546 qemu_file_set_error(f, -EIO);
547 } else if (len != -EAGAIN)
548 qemu_file_set_error(f, len);
551 int qemu_get_fd(QEMUFile *f)
553 if (f->ops->get_fd) {
554 return f->ops->get_fd(f->opaque);
561 * Returns negative error value if any error happened on previous operations or
562 * while closing the file. Returns 0 or positive number on success.
564 * The meaning of return value on success depends on the specific backend
567 int qemu_fclose(QEMUFile *f)
571 ret = qemu_file_get_error(f);
574 int ret2 = f->ops->close(f->opaque);
579 /* If any error was spotted before closing, we should report it
580 * instead of the close() return value.
589 void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
597 if (f->is_write == 0 && f->buf_index > 0) {
599 "Attempted to write to buffer while read buffer is not empty\n");
604 l = IO_BUF_SIZE - f->buf_index;
607 memcpy(f->buf + f->buf_index, buf, l);
613 if (f->buf_index >= IO_BUF_SIZE) {
615 if (qemu_file_get_error(f)) {
622 void qemu_put_byte(QEMUFile *f, int v)
628 if (f->is_write == 0 && f->buf_index > 0) {
630 "Attempted to write to buffer while read buffer is not empty\n");
634 f->buf[f->buf_index++] = v;
636 if (f->buf_index >= IO_BUF_SIZE) {
641 static void qemu_file_skip(QEMUFile *f, int size)
643 if (f->buf_index + size <= f->buf_size) {
644 f->buf_index += size;
648 static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
657 index = f->buf_index + offset;
658 pending = f->buf_size - index;
659 if (pending < size) {
661 index = f->buf_index + offset;
662 pending = f->buf_size - index;
668 if (size > pending) {
672 memcpy(buf, f->buf + index, size);
676 int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
681 while (pending > 0) {
684 res = qemu_peek_buffer(f, buf, pending, 0);
688 qemu_file_skip(f, res);
696 static int qemu_peek_byte(QEMUFile *f, int offset)
698 int index = f->buf_index + offset;
704 if (index >= f->buf_size) {
706 index = f->buf_index + offset;
707 if (index >= f->buf_size) {
711 return f->buf[index];
714 int qemu_get_byte(QEMUFile *f)
718 result = qemu_peek_byte(f, 0);
719 qemu_file_skip(f, 1);
723 int64_t qemu_ftell(QEMUFile *f)
729 int qemu_file_rate_limit(QEMUFile *f)
731 if (qemu_file_get_error(f)) {
734 if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) {
740 int64_t qemu_file_get_rate_limit(QEMUFile *f)
742 return f->xfer_limit;
745 void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit)
747 f->xfer_limit = limit;
750 void qemu_file_reset_rate_limit(QEMUFile *f)
755 void qemu_put_be16(QEMUFile *f, unsigned int v)
757 qemu_put_byte(f, v >> 8);
761 void qemu_put_be32(QEMUFile *f, unsigned int v)
763 qemu_put_byte(f, v >> 24);
764 qemu_put_byte(f, v >> 16);
765 qemu_put_byte(f, v >> 8);
769 void qemu_put_be64(QEMUFile *f, uint64_t v)
771 qemu_put_be32(f, v >> 32);
775 unsigned int qemu_get_be16(QEMUFile *f)
778 v = qemu_get_byte(f) << 8;
779 v |= qemu_get_byte(f);
783 unsigned int qemu_get_be32(QEMUFile *f)
786 v = qemu_get_byte(f) << 24;
787 v |= qemu_get_byte(f) << 16;
788 v |= qemu_get_byte(f) << 8;
789 v |= qemu_get_byte(f);
793 uint64_t qemu_get_be64(QEMUFile *f)
796 v = (uint64_t)qemu_get_be32(f) << 32;
797 v |= qemu_get_be32(f);
804 void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
806 uint64_t expire_time;
808 expire_time = qemu_timer_expire_time_ns(ts);
809 qemu_put_be64(f, expire_time);
812 void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
814 uint64_t expire_time;
816 expire_time = qemu_get_be64(f);
817 if (expire_time != -1) {
818 qemu_mod_timer_ns(ts, expire_time);
827 static int get_bool(QEMUFile *f, void *pv, size_t size)
830 *v = qemu_get_byte(f);
834 static void put_bool(QEMUFile *f, void *pv, size_t size)
837 qemu_put_byte(f, *v);
840 const VMStateInfo vmstate_info_bool = {
848 static int get_int8(QEMUFile *f, void *pv, size_t size)
855 static void put_int8(QEMUFile *f, void *pv, size_t size)
861 const VMStateInfo vmstate_info_int8 = {
869 static int get_int16(QEMUFile *f, void *pv, size_t size)
872 qemu_get_sbe16s(f, v);
876 static void put_int16(QEMUFile *f, void *pv, size_t size)
879 qemu_put_sbe16s(f, v);
882 const VMStateInfo vmstate_info_int16 = {
890 static int get_int32(QEMUFile *f, void *pv, size_t size)
893 qemu_get_sbe32s(f, v);
897 static void put_int32(QEMUFile *f, void *pv, size_t size)
900 qemu_put_sbe32s(f, v);
903 const VMStateInfo vmstate_info_int32 = {
909 /* 32 bit int. See that the received value is the same than the one
912 static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
916 qemu_get_sbe32s(f, &v2);
923 const VMStateInfo vmstate_info_int32_equal = {
924 .name = "int32 equal",
925 .get = get_int32_equal,
929 /* 32 bit int. See that the received value is the less or the same
930 than the one in the field */
932 static int get_int32_le(QEMUFile *f, void *pv, size_t size)
936 qemu_get_sbe32s(f, &new);
943 const VMStateInfo vmstate_info_int32_le = {
944 .name = "int32 equal",
951 static int get_int64(QEMUFile *f, void *pv, size_t size)
954 qemu_get_sbe64s(f, v);
958 static void put_int64(QEMUFile *f, void *pv, size_t size)
961 qemu_put_sbe64s(f, v);
964 const VMStateInfo vmstate_info_int64 = {
970 /* 8 bit unsigned int */
972 static int get_uint8(QEMUFile *f, void *pv, size_t size)
979 static void put_uint8(QEMUFile *f, void *pv, size_t size)
985 const VMStateInfo vmstate_info_uint8 = {
991 /* 16 bit unsigned int */
993 static int get_uint16(QEMUFile *f, void *pv, size_t size)
996 qemu_get_be16s(f, v);
1000 static void put_uint16(QEMUFile *f, void *pv, size_t size)
1003 qemu_put_be16s(f, v);
1006 const VMStateInfo vmstate_info_uint16 = {
1012 /* 32 bit unsigned int */
1014 static int get_uint32(QEMUFile *f, void *pv, size_t size)
1017 qemu_get_be32s(f, v);
1021 static void put_uint32(QEMUFile *f, void *pv, size_t size)
1024 qemu_put_be32s(f, v);
1027 const VMStateInfo vmstate_info_uint32 = {
1033 /* 32 bit uint. See that the received value is the same than the one
1036 static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
1040 qemu_get_be32s(f, &v2);
1048 const VMStateInfo vmstate_info_uint32_equal = {
1049 .name = "uint32 equal",
1050 .get = get_uint32_equal,
1054 /* 64 bit unsigned int */
1056 static int get_uint64(QEMUFile *f, void *pv, size_t size)
1059 qemu_get_be64s(f, v);
1063 static void put_uint64(QEMUFile *f, void *pv, size_t size)
1066 qemu_put_be64s(f, v);
1069 const VMStateInfo vmstate_info_uint64 = {
1075 /* 8 bit int. See that the received value is the same than the one
1078 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
1082 qemu_get_8s(f, &v2);
1089 const VMStateInfo vmstate_info_uint8_equal = {
1090 .name = "uint8 equal",
1091 .get = get_uint8_equal,
1095 /* 16 bit unsigned int int. See that the received value is the same than the one
1098 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
1102 qemu_get_be16s(f, &v2);
1109 const VMStateInfo vmstate_info_uint16_equal = {
1110 .name = "uint16 equal",
1111 .get = get_uint16_equal,
1117 static int get_timer(QEMUFile *f, void *pv, size_t size)
1120 qemu_get_timer(f, v);
1124 static void put_timer(QEMUFile *f, void *pv, size_t size)
1127 qemu_put_timer(f, v);
1130 const VMStateInfo vmstate_info_timer = {
1136 /* uint8_t buffers */
1138 static int get_buffer(QEMUFile *f, void *pv, size_t size)
1141 qemu_get_buffer(f, v, size);
1145 static void put_buffer(QEMUFile *f, void *pv, size_t size)
1148 qemu_put_buffer(f, v, size);
1151 const VMStateInfo vmstate_info_buffer = {
1157 /* unused buffers: space that was used for some fields that are
1158 not useful anymore */
1160 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
1166 block_len = MIN(sizeof(buf), size);
1168 qemu_get_buffer(f, buf, block_len);
1173 static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
1175 static const uint8_t buf[1024];
1179 block_len = MIN(sizeof(buf), size);
1181 qemu_put_buffer(f, buf, block_len);
1185 const VMStateInfo vmstate_info_unused_buffer = {
1186 .name = "unused_buffer",
1187 .get = get_unused_buffer,
1188 .put = put_unused_buffer,
1191 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1192 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1193 * bit words with the bits in big endian order. The in-memory format
1194 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1196 /* This is the number of 64 bit words sent over the wire */
1197 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1198 static int get_bitmap(QEMUFile *f, void *pv, size_t size)
1200 unsigned long *bmp = pv;
1202 for (i = 0; i < BITS_TO_U64S(size); i++) {
1203 uint64_t w = qemu_get_be64(f);
1205 if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
1206 bmp[idx++] = w >> 32;
1212 static void put_bitmap(QEMUFile *f, void *pv, size_t size)
1214 unsigned long *bmp = pv;
1216 for (i = 0; i < BITS_TO_U64S(size); i++) {
1217 uint64_t w = bmp[idx++];
1218 if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
1219 w |= ((uint64_t)bmp[idx++]) << 32;
1221 qemu_put_be64(f, w);
1225 const VMStateInfo vmstate_info_bitmap = {
1231 typedef struct CompatEntry {
1236 typedef struct SaveStateEntry {
1237 QTAILQ_ENTRY(SaveStateEntry) entry;
1243 SaveVMHandlers *ops;
1244 const VMStateDescription *vmsd;
1246 CompatEntry *compat;
1252 static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1253 QTAILQ_HEAD_INITIALIZER(savevm_handlers);
1254 static int global_section_id;
1256 static int calculate_new_instance_id(const char *idstr)
1259 int instance_id = 0;
1261 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1262 if (strcmp(idstr, se->idstr) == 0
1263 && instance_id <= se->instance_id) {
1264 instance_id = se->instance_id + 1;
1270 static int calculate_compat_instance_id(const char *idstr)
1273 int instance_id = 0;
1275 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1279 if (strcmp(idstr, se->compat->idstr) == 0
1280 && instance_id <= se->compat->instance_id) {
1281 instance_id = se->compat->instance_id + 1;
1287 /* TODO: Individual devices generally have very little idea about the rest
1288 of the system, so instance_id should be removed/replaced.
1289 Meanwhile pass -1 as instance_id if you do not already have a clearly
1290 distinguishing id for all instances of your device class. */
1291 int register_savevm_live(DeviceState *dev,
1295 SaveVMHandlers *ops,
1300 se = g_malloc0(sizeof(SaveStateEntry));
1301 se->version_id = version_id;
1302 se->section_id = global_section_id++;
1304 se->opaque = opaque;
1307 /* if this is a live_savem then set is_ram */
1308 if (ops->save_live_setup != NULL) {
1313 char *id = qdev_get_dev_path(dev);
1315 pstrcpy(se->idstr, sizeof(se->idstr), id);
1316 pstrcat(se->idstr, sizeof(se->idstr), "/");
1319 se->compat = g_malloc0(sizeof(CompatEntry));
1320 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
1321 se->compat->instance_id = instance_id == -1 ?
1322 calculate_compat_instance_id(idstr) : instance_id;
1326 pstrcat(se->idstr, sizeof(se->idstr), idstr);
1328 if (instance_id == -1) {
1329 se->instance_id = calculate_new_instance_id(se->idstr);
1331 se->instance_id = instance_id;
1333 assert(!se->compat || se->instance_id == 0);
1334 /* add at the end of list */
1335 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1339 int register_savevm(DeviceState *dev,
1343 SaveStateHandler *save_state,
1344 LoadStateHandler *load_state,
1347 SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
1348 ops->save_state = save_state;
1349 ops->load_state = load_state;
1350 return register_savevm_live(dev, idstr, instance_id, version_id,
1354 void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
1356 SaveStateEntry *se, *new_se;
1360 char *path = qdev_get_dev_path(dev);
1362 pstrcpy(id, sizeof(id), path);
1363 pstrcat(id, sizeof(id), "/");
1367 pstrcat(id, sizeof(id), idstr);
1369 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1370 if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
1371 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1381 int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
1382 const VMStateDescription *vmsd,
1383 void *opaque, int alias_id,
1384 int required_for_version)
1388 /* If this triggers, alias support can be dropped for the vmsd. */
1389 assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
1391 se = g_malloc0(sizeof(SaveStateEntry));
1392 se->version_id = vmsd->version_id;
1393 se->section_id = global_section_id++;
1394 se->opaque = opaque;
1396 se->alias_id = alias_id;
1397 se->no_migrate = vmsd->unmigratable;
1400 char *id = qdev_get_dev_path(dev);
1402 pstrcpy(se->idstr, sizeof(se->idstr), id);
1403 pstrcat(se->idstr, sizeof(se->idstr), "/");
1406 se->compat = g_malloc0(sizeof(CompatEntry));
1407 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
1408 se->compat->instance_id = instance_id == -1 ?
1409 calculate_compat_instance_id(vmsd->name) : instance_id;
1413 pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
1415 if (instance_id == -1) {
1416 se->instance_id = calculate_new_instance_id(se->idstr);
1418 se->instance_id = instance_id;
1420 assert(!se->compat || se->instance_id == 0);
1421 /* add at the end of list */
1422 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
1426 void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
1429 SaveStateEntry *se, *new_se;
1431 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
1432 if (se->vmsd == vmsd && se->opaque == opaque) {
1433 QTAILQ_REMOVE(&savevm_handlers, se, entry);
1442 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1444 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1447 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1448 void *opaque, int version_id)
1450 VMStateField *field = vmsd->fields;
1453 if (version_id > vmsd->version_id) {
1456 if (version_id < vmsd->minimum_version_id_old) {
1459 if (version_id < vmsd->minimum_version_id) {
1460 return vmsd->load_state_old(f, opaque, version_id);
1462 if (vmsd->pre_load) {
1463 int ret = vmsd->pre_load(opaque);
1467 while(field->name) {
1468 if ((field->field_exists &&
1469 field->field_exists(opaque, version_id)) ||
1470 (!field->field_exists &&
1471 field->version_id <= version_id)) {
1472 void *base_addr = opaque + field->offset;
1474 int size = field->size;
1476 if (field->flags & VMS_VBUFFER) {
1477 size = *(int32_t *)(opaque+field->size_offset);
1478 if (field->flags & VMS_MULTIPLY) {
1479 size *= field->size;
1482 if (field->flags & VMS_ARRAY) {
1483 n_elems = field->num;
1484 } else if (field->flags & VMS_VARRAY_INT32) {
1485 n_elems = *(int32_t *)(opaque+field->num_offset);
1486 } else if (field->flags & VMS_VARRAY_UINT32) {
1487 n_elems = *(uint32_t *)(opaque+field->num_offset);
1488 } else if (field->flags & VMS_VARRAY_UINT16) {
1489 n_elems = *(uint16_t *)(opaque+field->num_offset);
1490 } else if (field->flags & VMS_VARRAY_UINT8) {
1491 n_elems = *(uint8_t *)(opaque+field->num_offset);
1493 if (field->flags & VMS_POINTER) {
1494 base_addr = *(void **)base_addr + field->start;
1496 for (i = 0; i < n_elems; i++) {
1497 void *addr = base_addr + size * i;
1499 if (field->flags & VMS_ARRAY_OF_POINTER) {
1500 addr = *(void **)addr;
1502 if (field->flags & VMS_STRUCT) {
1503 ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
1505 ret = field->info->get(f, addr, size);
1515 ret = vmstate_subsection_load(f, vmsd, opaque);
1519 if (vmsd->post_load) {
1520 return vmsd->post_load(opaque, version_id);
1525 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
1528 VMStateField *field = vmsd->fields;
1530 if (vmsd->pre_save) {
1531 vmsd->pre_save(opaque);
1533 while(field->name) {
1534 if (!field->field_exists ||
1535 field->field_exists(opaque, vmsd->version_id)) {
1536 void *base_addr = opaque + field->offset;
1538 int size = field->size;
1540 if (field->flags & VMS_VBUFFER) {
1541 size = *(int32_t *)(opaque+field->size_offset);
1542 if (field->flags & VMS_MULTIPLY) {
1543 size *= field->size;
1546 if (field->flags & VMS_ARRAY) {
1547 n_elems = field->num;
1548 } else if (field->flags & VMS_VARRAY_INT32) {
1549 n_elems = *(int32_t *)(opaque+field->num_offset);
1550 } else if (field->flags & VMS_VARRAY_UINT32) {
1551 n_elems = *(uint32_t *)(opaque+field->num_offset);
1552 } else if (field->flags & VMS_VARRAY_UINT16) {
1553 n_elems = *(uint16_t *)(opaque+field->num_offset);
1554 } else if (field->flags & VMS_VARRAY_UINT8) {
1555 n_elems = *(uint8_t *)(opaque+field->num_offset);
1557 if (field->flags & VMS_POINTER) {
1558 base_addr = *(void **)base_addr + field->start;
1560 for (i = 0; i < n_elems; i++) {
1561 void *addr = base_addr + size * i;
1563 if (field->flags & VMS_ARRAY_OF_POINTER) {
1564 addr = *(void **)addr;
1566 if (field->flags & VMS_STRUCT) {
1567 vmstate_save_state(f, field->vmsd, addr);
1569 field->info->put(f, addr, size);
1575 vmstate_subsection_save(f, vmsd, opaque);
1578 static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1580 if (!se->vmsd) { /* Old style */
1581 return se->ops->load_state(f, se->opaque, version_id);
1583 return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
1586 static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
1588 if (!se->vmsd) { /* Old style */
1589 se->ops->save_state(f, se->opaque);
1592 vmstate_save_state(f,se->vmsd, se->opaque);
1595 #define QEMU_VM_FILE_MAGIC 0x5145564d
1596 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1597 #define QEMU_VM_FILE_VERSION 0x00000003
1599 #define QEMU_VM_EOF 0x00
1600 #define QEMU_VM_SECTION_START 0x01
1601 #define QEMU_VM_SECTION_PART 0x02
1602 #define QEMU_VM_SECTION_END 0x03
1603 #define QEMU_VM_SECTION_FULL 0x04
1604 #define QEMU_VM_SUBSECTION 0x05
1606 bool qemu_savevm_state_blocked(Error **errp)
1610 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1611 if (se->no_migrate) {
1612 error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr);
1619 void qemu_savevm_state_begin(QEMUFile *f,
1620 const MigrationParams *params)
1625 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1626 if (!se->ops || !se->ops->set_params) {
1629 se->ops->set_params(params, se->opaque);
1632 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1633 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1635 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1638 if (!se->ops || !se->ops->save_live_setup) {
1641 if (se->ops && se->ops->is_active) {
1642 if (!se->ops->is_active(se->opaque)) {
1647 qemu_put_byte(f, QEMU_VM_SECTION_START);
1648 qemu_put_be32(f, se->section_id);
1651 len = strlen(se->idstr);
1652 qemu_put_byte(f, len);
1653 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1655 qemu_put_be32(f, se->instance_id);
1656 qemu_put_be32(f, se->version_id);
1658 ret = se->ops->save_live_setup(f, se->opaque);
1660 qemu_file_set_error(f, ret);
1667 * this function has three return values:
1668 * negative: there was one error, and we have -errno.
1669 * 0 : We haven't finished, caller have to go again
1670 * 1 : We have finished, we can go to complete phase
1672 int qemu_savevm_state_iterate(QEMUFile *f)
1677 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1678 if (!se->ops || !se->ops->save_live_iterate) {
1681 if (se->ops && se->ops->is_active) {
1682 if (!se->ops->is_active(se->opaque)) {
1686 if (qemu_file_rate_limit(f)) {
1689 trace_savevm_section_start();
1691 qemu_put_byte(f, QEMU_VM_SECTION_PART);
1692 qemu_put_be32(f, se->section_id);
1694 ret = se->ops->save_live_iterate(f, se->opaque);
1695 trace_savevm_section_end(se->section_id);
1698 qemu_file_set_error(f, ret);
1701 /* Do not proceed to the next vmstate before this one reported
1702 completion of the current stage. This serializes the migration
1703 and reduces the probability that a faster changing state is
1704 synchronized over and over again. */
1711 void qemu_savevm_state_complete(QEMUFile *f)
1716 cpu_synchronize_all_states();
1718 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1719 if (!se->ops || !se->ops->save_live_complete) {
1722 if (se->ops && se->ops->is_active) {
1723 if (!se->ops->is_active(se->opaque)) {
1727 trace_savevm_section_start();
1729 qemu_put_byte(f, QEMU_VM_SECTION_END);
1730 qemu_put_be32(f, se->section_id);
1732 ret = se->ops->save_live_complete(f, se->opaque);
1733 trace_savevm_section_end(se->section_id);
1735 qemu_file_set_error(f, ret);
1740 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1743 if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
1746 trace_savevm_section_start();
1748 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1749 qemu_put_be32(f, se->section_id);
1752 len = strlen(se->idstr);
1753 qemu_put_byte(f, len);
1754 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1756 qemu_put_be32(f, se->instance_id);
1757 qemu_put_be32(f, se->version_id);
1759 vmstate_save(f, se);
1760 trace_savevm_section_end(se->section_id);
1763 qemu_put_byte(f, QEMU_VM_EOF);
1767 uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size)
1772 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1773 if (!se->ops || !se->ops->save_live_pending) {
1776 if (se->ops && se->ops->is_active) {
1777 if (!se->ops->is_active(se->opaque)) {
1781 ret += se->ops->save_live_pending(f, se->opaque, max_size);
1786 void qemu_savevm_state_cancel(void)
1790 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1791 if (se->ops && se->ops->cancel) {
1792 se->ops->cancel(se->opaque);
1797 static int qemu_savevm_state(QEMUFile *f)
1800 MigrationParams params = {
1805 if (qemu_savevm_state_blocked(NULL)) {
1809 qemu_mutex_unlock_iothread();
1810 qemu_savevm_state_begin(f, ¶ms);
1811 qemu_mutex_lock_iothread();
1813 while (qemu_file_get_error(f) == 0) {
1814 if (qemu_savevm_state_iterate(f) > 0) {
1819 ret = qemu_file_get_error(f);
1821 qemu_savevm_state_complete(f);
1822 ret = qemu_file_get_error(f);
1825 qemu_savevm_state_cancel();
1830 static int qemu_save_device_state(QEMUFile *f)
1834 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1835 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1837 cpu_synchronize_all_states();
1839 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1845 if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
1850 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1851 qemu_put_be32(f, se->section_id);
1854 len = strlen(se->idstr);
1855 qemu_put_byte(f, len);
1856 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1858 qemu_put_be32(f, se->instance_id);
1859 qemu_put_be32(f, se->version_id);
1861 vmstate_save(f, se);
1864 qemu_put_byte(f, QEMU_VM_EOF);
1866 return qemu_file_get_error(f);
1869 static SaveStateEntry *find_se(const char *idstr, int instance_id)
1873 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1874 if (!strcmp(se->idstr, idstr) &&
1875 (instance_id == se->instance_id ||
1876 instance_id == se->alias_id))
1878 /* Migrating from an older version? */
1879 if (strstr(se->idstr, idstr) && se->compat) {
1880 if (!strcmp(se->compat->idstr, idstr) &&
1881 (instance_id == se->compat->instance_id ||
1882 instance_id == se->alias_id))
1889 static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
1891 while(sub && sub->needed) {
1892 if (strcmp(idstr, sub->vmsd->name) == 0) {
1900 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1903 while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
1906 uint8_t version_id, len, size;
1907 const VMStateDescription *sub_vmsd;
1909 len = qemu_peek_byte(f, 1);
1910 if (len < strlen(vmsd->name) + 1) {
1911 /* subsection name has be be "section_name/a" */
1914 size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
1920 if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) {
1921 /* it don't have a valid subsection name */
1924 sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr);
1925 if (sub_vmsd == NULL) {
1928 qemu_file_skip(f, 1); /* subsection */
1929 qemu_file_skip(f, 1); /* len */
1930 qemu_file_skip(f, len); /* idstr */
1931 version_id = qemu_get_be32(f);
1933 ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
1941 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1944 const VMStateSubsection *sub = vmsd->subsections;
1946 while (sub && sub->needed) {
1947 if (sub->needed(opaque)) {
1948 const VMStateDescription *vmsd = sub->vmsd;
1951 qemu_put_byte(f, QEMU_VM_SUBSECTION);
1952 len = strlen(vmsd->name);
1953 qemu_put_byte(f, len);
1954 qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
1955 qemu_put_be32(f, vmsd->version_id);
1956 vmstate_save_state(f, vmsd, opaque);
1962 typedef struct LoadStateEntry {
1963 QLIST_ENTRY(LoadStateEntry) entry;
1969 int qemu_loadvm_state(QEMUFile *f)
1971 QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1972 QLIST_HEAD_INITIALIZER(loadvm_handlers);
1973 LoadStateEntry *le, *new_le;
1974 uint8_t section_type;
1978 if (qemu_savevm_state_blocked(NULL)) {
1982 v = qemu_get_be32(f);
1983 if (v != QEMU_VM_FILE_MAGIC)
1986 v = qemu_get_be32(f);
1987 if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1988 fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1991 if (v != QEMU_VM_FILE_VERSION)
1994 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1995 uint32_t instance_id, version_id, section_id;
2000 switch (section_type) {
2001 case QEMU_VM_SECTION_START:
2002 case QEMU_VM_SECTION_FULL:
2003 /* Read section start */
2004 section_id = qemu_get_be32(f);
2005 len = qemu_get_byte(f);
2006 qemu_get_buffer(f, (uint8_t *)idstr, len);
2008 instance_id = qemu_get_be32(f);
2009 version_id = qemu_get_be32(f);
2011 /* Find savevm section */
2012 se = find_se(idstr, instance_id);
2014 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
2019 /* Validate version */
2020 if (version_id > se->version_id) {
2021 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
2022 version_id, idstr, se->version_id);
2028 le = g_malloc0(sizeof(*le));
2031 le->section_id = section_id;
2032 le->version_id = version_id;
2033 QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
2035 ret = vmstate_load(f, le->se, le->version_id);
2037 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
2038 instance_id, idstr);
2042 case QEMU_VM_SECTION_PART:
2043 case QEMU_VM_SECTION_END:
2044 section_id = qemu_get_be32(f);
2046 QLIST_FOREACH(le, &loadvm_handlers, entry) {
2047 if (le->section_id == section_id) {
2052 fprintf(stderr, "Unknown savevm section %d\n", section_id);
2057 ret = vmstate_load(f, le->se, le->version_id);
2059 fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
2065 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
2071 cpu_synchronize_all_post_init();
2076 QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
2077 QLIST_REMOVE(le, entry);
2082 ret = qemu_file_get_error(f);
2088 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
2091 QEMUSnapshotInfo *sn_tab, *sn;
2095 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
2098 for(i = 0; i < nb_sns; i++) {
2100 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
2111 * Deletes snapshots of a given name in all opened images.
2113 static int del_existing_snapshots(Monitor *mon, const char *name)
2115 BlockDriverState *bs;
2116 QEMUSnapshotInfo sn1, *snapshot = &sn1;
2120 while ((bs = bdrv_next(bs))) {
2121 if (bdrv_can_snapshot(bs) &&
2122 bdrv_snapshot_find(bs, snapshot, name) >= 0)
2124 ret = bdrv_snapshot_delete(bs, name);
2127 "Error while deleting snapshot on '%s'\n",
2128 bdrv_get_device_name(bs));
2137 void do_savevm(Monitor *mon, const QDict *qdict)
2139 BlockDriverState *bs, *bs1;
2140 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
2143 int saved_vm_running;
2144 uint64_t vm_state_size;
2147 const char *name = qdict_get_try_str(qdict, "name");
2149 /* Verify if there is a device that doesn't support snapshots and is writable */
2151 while ((bs = bdrv_next(bs))) {
2153 if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
2157 if (!bdrv_can_snapshot(bs)) {
2158 monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
2159 bdrv_get_device_name(bs));
2164 bs = bdrv_snapshots();
2166 monitor_printf(mon, "No block device can accept snapshots\n");
2170 saved_vm_running = runstate_is_running();
2171 vm_stop(RUN_STATE_SAVE_VM);
2173 memset(sn, 0, sizeof(*sn));
2175 /* fill auxiliary fields */
2176 qemu_gettimeofday(&tv);
2177 sn->date_sec = tv.tv_sec;
2178 sn->date_nsec = tv.tv_usec * 1000;
2179 sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
2182 ret = bdrv_snapshot_find(bs, old_sn, name);
2184 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
2185 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
2187 pstrcpy(sn->name, sizeof(sn->name), name);
2190 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2191 localtime_r((const time_t *)&tv.tv_sec, &tm);
2192 strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
2195 /* Delete old snapshots of the same name */
2196 if (name && del_existing_snapshots(mon, name) < 0) {
2200 /* save the VM state */
2201 f = qemu_fopen_bdrv(bs, 1);
2203 monitor_printf(mon, "Could not open VM state file\n");
2206 ret = qemu_savevm_state(f);
2207 vm_state_size = qemu_ftell(f);
2210 monitor_printf(mon, "Error %d while writing VM\n", ret);
2214 /* create the snapshots */
2217 while ((bs1 = bdrv_next(bs1))) {
2218 if (bdrv_can_snapshot(bs1)) {
2219 /* Write VM state size only to the image that contains the state */
2220 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
2221 ret = bdrv_snapshot_create(bs1, sn);
2223 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
2224 bdrv_get_device_name(bs1));
2230 if (saved_vm_running)
2234 void qmp_xen_save_devices_state(const char *filename, Error **errp)
2237 int saved_vm_running;
2240 saved_vm_running = runstate_is_running();
2241 vm_stop(RUN_STATE_SAVE_VM);
2243 f = qemu_fopen(filename, "wb");
2245 error_set(errp, QERR_OPEN_FILE_FAILED, filename);
2248 ret = qemu_save_device_state(f);
2251 error_set(errp, QERR_IO_ERROR);
2255 if (saved_vm_running)
2259 int load_vmstate(const char *name)
2261 BlockDriverState *bs, *bs_vm_state;
2262 QEMUSnapshotInfo sn;
2266 bs_vm_state = bdrv_snapshots();
2268 error_report("No block device supports snapshots");
2272 /* Don't even try to load empty VM states */
2273 ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
2276 } else if (sn.vm_state_size == 0) {
2277 error_report("This is a disk-only snapshot. Revert to it offline "
2282 /* Verify if there is any device that doesn't support snapshots and is
2283 writable and check if the requested snapshot is available too. */
2285 while ((bs = bdrv_next(bs))) {
2287 if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
2291 if (!bdrv_can_snapshot(bs)) {
2292 error_report("Device '%s' is writable but does not support snapshots.",
2293 bdrv_get_device_name(bs));
2297 ret = bdrv_snapshot_find(bs, &sn, name);
2299 error_report("Device '%s' does not have the requested snapshot '%s'",
2300 bdrv_get_device_name(bs), name);
2305 /* Flush all IO requests so they don't interfere with the new state. */
2309 while ((bs = bdrv_next(bs))) {
2310 if (bdrv_can_snapshot(bs)) {
2311 ret = bdrv_snapshot_goto(bs, name);
2313 error_report("Error %d while activating snapshot '%s' on '%s'",
2314 ret, name, bdrv_get_device_name(bs));
2320 /* restore the VM state */
2321 f = qemu_fopen_bdrv(bs_vm_state, 0);
2323 error_report("Could not open VM state file");
2327 qemu_system_reset(VMRESET_SILENT);
2328 ret = qemu_loadvm_state(f);
2332 error_report("Error %d while loading VM state", ret);
2339 void do_delvm(Monitor *mon, const QDict *qdict)
2341 BlockDriverState *bs, *bs1;
2343 const char *name = qdict_get_str(qdict, "name");
2345 bs = bdrv_snapshots();
2347 monitor_printf(mon, "No block device supports snapshots\n");
2352 while ((bs1 = bdrv_next(bs1))) {
2353 if (bdrv_can_snapshot(bs1)) {
2354 ret = bdrv_snapshot_delete(bs1, name);
2356 if (ret == -ENOTSUP)
2358 "Snapshots not supported on device '%s'\n",
2359 bdrv_get_device_name(bs1));
2361 monitor_printf(mon, "Error %d while deleting snapshot on "
2362 "'%s'\n", ret, bdrv_get_device_name(bs1));
2368 void do_info_snapshots(Monitor *mon, const QDict *qdict)
2370 BlockDriverState *bs, *bs1;
2371 QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
2372 int nb_sns, i, ret, available;
2374 int *available_snapshots;
2377 bs = bdrv_snapshots();
2379 monitor_printf(mon, "No available block device supports snapshots\n");
2383 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
2385 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
2390 monitor_printf(mon, "There is no snapshot available.\n");
2394 available_snapshots = g_malloc0(sizeof(int) * nb_sns);
2396 for (i = 0; i < nb_sns; i++) {
2401 while ((bs1 = bdrv_next(bs1))) {
2402 if (bdrv_can_snapshot(bs1) && bs1 != bs) {
2403 ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
2412 available_snapshots[total] = i;
2418 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
2419 for (i = 0; i < total; i++) {
2420 sn = &sn_tab[available_snapshots[i]];
2421 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
2424 monitor_printf(mon, "There is no suitable snapshot available\n");
2428 g_free(available_snapshots);
2432 void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
2434 qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK,
2435 memory_region_name(mr), dev);
2438 void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
2440 /* Nothing do to while the implementation is in RAMBlock */
2443 void vmstate_register_ram_global(MemoryRegion *mr)
2445 vmstate_register_ram(mr, NULL);