root / savevm.c @ e3f5ec2b
History | View | Annotate | Download (32.2 kB)
1 |
/*
|
---|---|
2 |
* QEMU System Emulator
|
3 |
*
|
4 |
* Copyright (c) 2003-2008 Fabrice Bellard
|
5 |
*
|
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:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
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
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include <unistd.h> |
25 |
#include <fcntl.h> |
26 |
#include <signal.h> |
27 |
#include <time.h> |
28 |
#include <errno.h> |
29 |
#include <sys/time.h> |
30 |
#include <zlib.h> |
31 |
|
32 |
/* Needed early for HOST_BSD etc. */
|
33 |
#include "config-host.h" |
34 |
|
35 |
#ifndef _WIN32
|
36 |
#include <sys/times.h> |
37 |
#include <sys/wait.h> |
38 |
#include <termios.h> |
39 |
#include <sys/mman.h> |
40 |
#include <sys/ioctl.h> |
41 |
#include <sys/resource.h> |
42 |
#include <sys/socket.h> |
43 |
#include <netinet/in.h> |
44 |
#include <net/if.h> |
45 |
#if defined(__NetBSD__)
|
46 |
#include <net/if_tap.h> |
47 |
#endif
|
48 |
#ifdef __linux__
|
49 |
#include <linux/if_tun.h> |
50 |
#endif
|
51 |
#include <arpa/inet.h> |
52 |
#include <dirent.h> |
53 |
#include <netdb.h> |
54 |
#include <sys/select.h> |
55 |
#ifdef HOST_BSD
|
56 |
#include <sys/stat.h> |
57 |
#if defined(__FreeBSD__) || defined(__DragonFly__)
|
58 |
#include <libutil.h> |
59 |
#else
|
60 |
#include <util.h> |
61 |
#endif
|
62 |
#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
|
63 |
#include <freebsd/stdlib.h> |
64 |
#else
|
65 |
#ifdef __linux__
|
66 |
#include <pty.h> |
67 |
#include <malloc.h> |
68 |
#include <linux/rtc.h> |
69 |
#endif
|
70 |
#endif
|
71 |
#endif
|
72 |
|
73 |
#ifdef _WIN32
|
74 |
#include <windows.h> |
75 |
#include <malloc.h> |
76 |
#include <sys/timeb.h> |
77 |
#include <mmsystem.h> |
78 |
#define getopt_long_only getopt_long
|
79 |
#define memalign(align, size) malloc(size)
|
80 |
#endif
|
81 |
|
82 |
#include "qemu-common.h" |
83 |
#include "hw/hw.h" |
84 |
#include "net.h" |
85 |
#include "monitor.h" |
86 |
#include "sysemu.h" |
87 |
#include "qemu-timer.h" |
88 |
#include "qemu-char.h" |
89 |
#include "block.h" |
90 |
#include "audio/audio.h" |
91 |
#include "migration.h" |
92 |
#include "qemu_socket.h" |
93 |
|
94 |
/* point to the block driver where the snapshots are managed */
|
95 |
static BlockDriverState *bs_snapshots;
|
96 |
|
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 |
101 |
|
102 |
static int announce_self_create(uint8_t *buf, |
103 |
uint8_t *mac_addr) |
104 |
{ |
105 |
uint32_t magic = EXPERIMENTAL_MAGIC; |
106 |
uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
107 |
|
108 |
/* FIXME: should we send a different packet (arp/rarp/ping)? */
|
109 |
|
110 |
memset(buf, 0, 64); |
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 */ |
115 |
|
116 |
return 64; /* len */ |
117 |
} |
118 |
|
119 |
static void qemu_announce_self_once(void *opaque) |
120 |
{ |
121 |
int i, len;
|
122 |
VLANState *vlan; |
123 |
VLANClientState *vc; |
124 |
uint8_t buf[256];
|
125 |
static int count = SELF_ANNOUNCE_ROUNDS; |
126 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
127 |
|
128 |
for (i = 0; i < MAX_NICS; i++) { |
129 |
if (!nd_table[i].used)
|
130 |
continue;
|
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); |
135 |
} |
136 |
} |
137 |
if (count--) {
|
138 |
qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100);
|
139 |
} else {
|
140 |
qemu_del_timer(timer); |
141 |
qemu_free_timer(timer); |
142 |
} |
143 |
} |
144 |
|
145 |
void qemu_announce_self(void) |
146 |
{ |
147 |
static QEMUTimer *timer;
|
148 |
timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
149 |
qemu_announce_self_once(&timer); |
150 |
} |
151 |
|
152 |
/***********************************************************/
|
153 |
/* savevm/loadvm support */
|
154 |
|
155 |
#define IO_BUF_SIZE 32768 |
156 |
|
157 |
struct QEMUFile {
|
158 |
QEMUFilePutBufferFunc *put_buffer; |
159 |
QEMUFileGetBufferFunc *get_buffer; |
160 |
QEMUFileCloseFunc *close; |
161 |
QEMUFileRateLimit *rate_limit; |
162 |
QEMUFileSetRateLimit *set_rate_limit; |
163 |
void *opaque;
|
164 |
int is_write;
|
165 |
|
166 |
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
167 |
when reading */
|
168 |
int buf_index;
|
169 |
int buf_size; /* 0 when writing */ |
170 |
uint8_t buf[IO_BUF_SIZE]; |
171 |
|
172 |
int has_error;
|
173 |
}; |
174 |
|
175 |
typedef struct QEMUFilePopen |
176 |
{ |
177 |
FILE *popen_file; |
178 |
QEMUFile *file; |
179 |
} QEMUFilePopen; |
180 |
|
181 |
typedef struct QEMUFileSocket |
182 |
{ |
183 |
int fd;
|
184 |
QEMUFile *file; |
185 |
} QEMUFileSocket; |
186 |
|
187 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
188 |
{ |
189 |
QEMUFileSocket *s = opaque; |
190 |
ssize_t len; |
191 |
|
192 |
do {
|
193 |
len = recv(s->fd, buf, size, 0);
|
194 |
} while (len == -1 && socket_error() == EINTR); |
195 |
|
196 |
if (len == -1) |
197 |
len = -socket_error(); |
198 |
|
199 |
return len;
|
200 |
} |
201 |
|
202 |
static int socket_close(void *opaque) |
203 |
{ |
204 |
QEMUFileSocket *s = opaque; |
205 |
qemu_free(s); |
206 |
return 0; |
207 |
} |
208 |
|
209 |
static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
210 |
{ |
211 |
QEMUFilePopen *s = opaque; |
212 |
return fwrite(buf, 1, size, s->popen_file); |
213 |
} |
214 |
|
215 |
static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
216 |
{ |
217 |
QEMUFilePopen *s = opaque; |
218 |
return fread(buf, 1, size, s->popen_file); |
219 |
} |
220 |
|
221 |
static int popen_close(void *opaque) |
222 |
{ |
223 |
QEMUFilePopen *s = opaque; |
224 |
pclose(s->popen_file); |
225 |
qemu_free(s); |
226 |
return 0; |
227 |
} |
228 |
|
229 |
QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
230 |
{ |
231 |
QEMUFilePopen *s; |
232 |
|
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");
|
235 |
return NULL; |
236 |
} |
237 |
|
238 |
s = qemu_mallocz(sizeof(QEMUFilePopen));
|
239 |
|
240 |
s->popen_file = popen_file; |
241 |
|
242 |
if(mode[0] == 'r') { |
243 |
s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL); |
244 |
} else {
|
245 |
s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL); |
246 |
} |
247 |
return s->file;
|
248 |
} |
249 |
|
250 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
251 |
{ |
252 |
FILE *popen_file; |
253 |
|
254 |
popen_file = popen(command, mode); |
255 |
if(popen_file == NULL) { |
256 |
return NULL; |
257 |
} |
258 |
|
259 |
return qemu_popen(popen_file, mode);
|
260 |
} |
261 |
|
262 |
int qemu_popen_fd(QEMUFile *f)
|
263 |
{ |
264 |
QEMUFilePopen *p; |
265 |
int fd;
|
266 |
|
267 |
p = (QEMUFilePopen *)f->opaque; |
268 |
fd = fileno(p->popen_file); |
269 |
|
270 |
return fd;
|
271 |
} |
272 |
|
273 |
QEMUFile *qemu_fopen_socket(int fd)
|
274 |
{ |
275 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
276 |
|
277 |
s->fd = fd; |
278 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
279 |
return s->file;
|
280 |
} |
281 |
|
282 |
typedef struct QEMUFileStdio |
283 |
{ |
284 |
FILE *outfile; |
285 |
} QEMUFileStdio; |
286 |
|
287 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
288 |
int64_t pos, int size)
|
289 |
{ |
290 |
QEMUFileStdio *s = opaque; |
291 |
fseek(s->outfile, pos, SEEK_SET); |
292 |
fwrite(buf, 1, size, s->outfile);
|
293 |
return size;
|
294 |
} |
295 |
|
296 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
297 |
{ |
298 |
QEMUFileStdio *s = opaque; |
299 |
fseek(s->outfile, pos, SEEK_SET); |
300 |
return fread(buf, 1, size, s->outfile); |
301 |
} |
302 |
|
303 |
static int file_close(void *opaque) |
304 |
{ |
305 |
QEMUFileStdio *s = opaque; |
306 |
fclose(s->outfile); |
307 |
qemu_free(s); |
308 |
return 0; |
309 |
} |
310 |
|
311 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
312 |
{ |
313 |
QEMUFileStdio *s; |
314 |
|
315 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
316 |
|
317 |
s->outfile = fopen(filename, mode); |
318 |
if (!s->outfile)
|
319 |
goto fail;
|
320 |
|
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); |
325 |
|
326 |
fail:
|
327 |
if (s->outfile)
|
328 |
fclose(s->outfile); |
329 |
qemu_free(s); |
330 |
return NULL; |
331 |
} |
332 |
|
333 |
typedef struct QEMUFileBdrv |
334 |
{ |
335 |
BlockDriverState *bs; |
336 |
int64_t base_offset; |
337 |
} QEMUFileBdrv; |
338 |
|
339 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
340 |
int64_t pos, int size)
|
341 |
{ |
342 |
QEMUFileBdrv *s = opaque; |
343 |
bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size); |
344 |
return size;
|
345 |
} |
346 |
|
347 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
348 |
{ |
349 |
QEMUFileBdrv *s = opaque; |
350 |
return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
|
351 |
} |
352 |
|
353 |
static int bdrv_fclose(void *opaque) |
354 |
{ |
355 |
QEMUFileBdrv *s = opaque; |
356 |
qemu_free(s); |
357 |
return 0; |
358 |
} |
359 |
|
360 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
361 |
{ |
362 |
QEMUFileBdrv *s; |
363 |
|
364 |
s = qemu_mallocz(sizeof(QEMUFileBdrv));
|
365 |
|
366 |
s->bs = bs; |
367 |
s->base_offset = offset; |
368 |
|
369 |
if (is_writable)
|
370 |
return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
371 |
|
372 |
return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
373 |
} |
374 |
|
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) |
380 |
{ |
381 |
QEMUFile *f; |
382 |
|
383 |
f = qemu_mallocz(sizeof(QEMUFile));
|
384 |
|
385 |
f->opaque = opaque; |
386 |
f->put_buffer = put_buffer; |
387 |
f->get_buffer = get_buffer; |
388 |
f->close = close; |
389 |
f->rate_limit = rate_limit; |
390 |
f->set_rate_limit = set_rate_limit; |
391 |
f->is_write = 0;
|
392 |
|
393 |
return f;
|
394 |
} |
395 |
|
396 |
int qemu_file_has_error(QEMUFile *f)
|
397 |
{ |
398 |
return f->has_error;
|
399 |
} |
400 |
|
401 |
void qemu_file_set_error(QEMUFile *f)
|
402 |
{ |
403 |
f->has_error = 1;
|
404 |
} |
405 |
|
406 |
void qemu_fflush(QEMUFile *f)
|
407 |
{ |
408 |
if (!f->put_buffer)
|
409 |
return;
|
410 |
|
411 |
if (f->is_write && f->buf_index > 0) { |
412 |
int len;
|
413 |
|
414 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
415 |
if (len > 0) |
416 |
f->buf_offset += f->buf_index; |
417 |
else
|
418 |
f->has_error = 1;
|
419 |
f->buf_index = 0;
|
420 |
} |
421 |
} |
422 |
|
423 |
static void qemu_fill_buffer(QEMUFile *f) |
424 |
{ |
425 |
int len;
|
426 |
|
427 |
if (!f->get_buffer)
|
428 |
return;
|
429 |
|
430 |
if (f->is_write)
|
431 |
abort(); |
432 |
|
433 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
434 |
if (len > 0) { |
435 |
f->buf_index = 0;
|
436 |
f->buf_size = len; |
437 |
f->buf_offset += len; |
438 |
} else if (len != -EAGAIN) |
439 |
f->has_error = 1;
|
440 |
} |
441 |
|
442 |
int qemu_fclose(QEMUFile *f)
|
443 |
{ |
444 |
int ret = 0; |
445 |
qemu_fflush(f); |
446 |
if (f->close)
|
447 |
ret = f->close(f->opaque); |
448 |
qemu_free(f); |
449 |
return ret;
|
450 |
} |
451 |
|
452 |
void qemu_file_put_notify(QEMUFile *f)
|
453 |
{ |
454 |
f->put_buffer(f->opaque, NULL, 0, 0); |
455 |
} |
456 |
|
457 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
458 |
{ |
459 |
int l;
|
460 |
|
461 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
462 |
fprintf(stderr, |
463 |
"Attempted to write to buffer while read buffer is not empty\n");
|
464 |
abort(); |
465 |
} |
466 |
|
467 |
while (!f->has_error && size > 0) { |
468 |
l = IO_BUF_SIZE - f->buf_index; |
469 |
if (l > size)
|
470 |
l = size; |
471 |
memcpy(f->buf + f->buf_index, buf, l); |
472 |
f->is_write = 1;
|
473 |
f->buf_index += l; |
474 |
buf += l; |
475 |
size -= l; |
476 |
if (f->buf_index >= IO_BUF_SIZE)
|
477 |
qemu_fflush(f); |
478 |
} |
479 |
} |
480 |
|
481 |
void qemu_put_byte(QEMUFile *f, int v) |
482 |
{ |
483 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
484 |
fprintf(stderr, |
485 |
"Attempted to write to buffer while read buffer is not empty\n");
|
486 |
abort(); |
487 |
} |
488 |
|
489 |
f->buf[f->buf_index++] = v; |
490 |
f->is_write = 1;
|
491 |
if (f->buf_index >= IO_BUF_SIZE)
|
492 |
qemu_fflush(f); |
493 |
} |
494 |
|
495 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
496 |
{ |
497 |
int size, l;
|
498 |
|
499 |
if (f->is_write)
|
500 |
abort(); |
501 |
|
502 |
size = size1; |
503 |
while (size > 0) { |
504 |
l = f->buf_size - f->buf_index; |
505 |
if (l == 0) { |
506 |
qemu_fill_buffer(f); |
507 |
l = f->buf_size - f->buf_index; |
508 |
if (l == 0) |
509 |
break;
|
510 |
} |
511 |
if (l > size)
|
512 |
l = size; |
513 |
memcpy(buf, f->buf + f->buf_index, l); |
514 |
f->buf_index += l; |
515 |
buf += l; |
516 |
size -= l; |
517 |
} |
518 |
return size1 - size;
|
519 |
} |
520 |
|
521 |
int qemu_get_byte(QEMUFile *f)
|
522 |
{ |
523 |
if (f->is_write)
|
524 |
abort(); |
525 |
|
526 |
if (f->buf_index >= f->buf_size) {
|
527 |
qemu_fill_buffer(f); |
528 |
if (f->buf_index >= f->buf_size)
|
529 |
return 0; |
530 |
} |
531 |
return f->buf[f->buf_index++];
|
532 |
} |
533 |
|
534 |
int64_t qemu_ftell(QEMUFile *f) |
535 |
{ |
536 |
return f->buf_offset - f->buf_size + f->buf_index;
|
537 |
} |
538 |
|
539 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
540 |
{ |
541 |
if (whence == SEEK_SET) {
|
542 |
/* nothing to do */
|
543 |
} else if (whence == SEEK_CUR) { |
544 |
pos += qemu_ftell(f); |
545 |
} else {
|
546 |
/* SEEK_END not supported */
|
547 |
return -1; |
548 |
} |
549 |
if (f->put_buffer) {
|
550 |
qemu_fflush(f); |
551 |
f->buf_offset = pos; |
552 |
} else {
|
553 |
f->buf_offset = pos; |
554 |
f->buf_index = 0;
|
555 |
f->buf_size = 0;
|
556 |
} |
557 |
return pos;
|
558 |
} |
559 |
|
560 |
int qemu_file_rate_limit(QEMUFile *f)
|
561 |
{ |
562 |
if (f->rate_limit)
|
563 |
return f->rate_limit(f->opaque);
|
564 |
|
565 |
return 0; |
566 |
} |
567 |
|
568 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
569 |
{ |
570 |
if (f->set_rate_limit)
|
571 |
return f->set_rate_limit(f->opaque, new_rate);
|
572 |
|
573 |
return 0; |
574 |
} |
575 |
|
576 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
577 |
{ |
578 |
qemu_put_byte(f, v >> 8);
|
579 |
qemu_put_byte(f, v); |
580 |
} |
581 |
|
582 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
583 |
{ |
584 |
qemu_put_byte(f, v >> 24);
|
585 |
qemu_put_byte(f, v >> 16);
|
586 |
qemu_put_byte(f, v >> 8);
|
587 |
qemu_put_byte(f, v); |
588 |
} |
589 |
|
590 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
591 |
{ |
592 |
qemu_put_be32(f, v >> 32);
|
593 |
qemu_put_be32(f, v); |
594 |
} |
595 |
|
596 |
unsigned int qemu_get_be16(QEMUFile *f) |
597 |
{ |
598 |
unsigned int v; |
599 |
v = qemu_get_byte(f) << 8;
|
600 |
v |= qemu_get_byte(f); |
601 |
return v;
|
602 |
} |
603 |
|
604 |
unsigned int qemu_get_be32(QEMUFile *f) |
605 |
{ |
606 |
unsigned int v; |
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); |
611 |
return v;
|
612 |
} |
613 |
|
614 |
uint64_t qemu_get_be64(QEMUFile *f) |
615 |
{ |
616 |
uint64_t v; |
617 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
618 |
v |= qemu_get_be32(f); |
619 |
return v;
|
620 |
} |
621 |
|
622 |
typedef struct SaveStateEntry { |
623 |
char idstr[256]; |
624 |
int instance_id;
|
625 |
int version_id;
|
626 |
int section_id;
|
627 |
SaveLiveStateHandler *save_live_state; |
628 |
SaveStateHandler *save_state; |
629 |
LoadStateHandler *load_state; |
630 |
void *opaque;
|
631 |
struct SaveStateEntry *next;
|
632 |
} SaveStateEntry; |
633 |
|
634 |
static SaveStateEntry *first_se;
|
635 |
|
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, |
641 |
int instance_id,
|
642 |
int version_id,
|
643 |
SaveLiveStateHandler *save_live_state, |
644 |
SaveStateHandler *save_state, |
645 |
LoadStateHandler *load_state, |
646 |
void *opaque)
|
647 |
{ |
648 |
SaveStateEntry *se, **pse; |
649 |
static int global_section_id; |
650 |
|
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; |
659 |
se->opaque = opaque; |
660 |
se->next = NULL;
|
661 |
|
662 |
/* add at the end of list */
|
663 |
pse = &first_se; |
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;
|
669 |
pse = &(*pse)->next; |
670 |
} |
671 |
*pse = se; |
672 |
return 0; |
673 |
} |
674 |
|
675 |
int register_savevm(const char *idstr, |
676 |
int instance_id,
|
677 |
int version_id,
|
678 |
SaveStateHandler *save_state, |
679 |
LoadStateHandler *load_state, |
680 |
void *opaque)
|
681 |
{ |
682 |
return register_savevm_live(idstr, instance_id, version_id,
|
683 |
NULL, save_state, load_state, opaque);
|
684 |
} |
685 |
|
686 |
void unregister_savevm(const char *idstr, void *opaque) |
687 |
{ |
688 |
SaveStateEntry **pse; |
689 |
|
690 |
pse = &first_se; |
691 |
while (*pse != NULL) { |
692 |
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
693 |
SaveStateEntry *next = (*pse)->next; |
694 |
qemu_free(*pse); |
695 |
*pse = next; |
696 |
continue;
|
697 |
} |
698 |
pse = &(*pse)->next; |
699 |
} |
700 |
} |
701 |
|
702 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
703 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
704 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
705 |
|
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 |
711 |
|
712 |
int qemu_savevm_state_begin(QEMUFile *f)
|
713 |
{ |
714 |
SaveStateEntry *se; |
715 |
|
716 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
717 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
718 |
|
719 |
for (se = first_se; se != NULL; se = se->next) { |
720 |
int len;
|
721 |
|
722 |
if (se->save_live_state == NULL) |
723 |
continue;
|
724 |
|
725 |
/* Section type */
|
726 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
727 |
qemu_put_be32(f, se->section_id); |
728 |
|
729 |
/* ID string */
|
730 |
len = strlen(se->idstr); |
731 |
qemu_put_byte(f, len); |
732 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
733 |
|
734 |
qemu_put_be32(f, se->instance_id); |
735 |
qemu_put_be32(f, se->version_id); |
736 |
|
737 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
738 |
} |
739 |
|
740 |
if (qemu_file_has_error(f))
|
741 |
return -EIO;
|
742 |
|
743 |
return 0; |
744 |
} |
745 |
|
746 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
747 |
{ |
748 |
SaveStateEntry *se; |
749 |
int ret = 1; |
750 |
|
751 |
for (se = first_se; se != NULL; se = se->next) { |
752 |
if (se->save_live_state == NULL) |
753 |
continue;
|
754 |
|
755 |
/* Section type */
|
756 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
757 |
qemu_put_be32(f, se->section_id); |
758 |
|
759 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
760 |
} |
761 |
|
762 |
if (ret)
|
763 |
return 1; |
764 |
|
765 |
if (qemu_file_has_error(f))
|
766 |
return -EIO;
|
767 |
|
768 |
return 0; |
769 |
} |
770 |
|
771 |
int qemu_savevm_state_complete(QEMUFile *f)
|
772 |
{ |
773 |
SaveStateEntry *se; |
774 |
|
775 |
for (se = first_se; se != NULL; se = se->next) { |
776 |
if (se->save_live_state == NULL) |
777 |
continue;
|
778 |
|
779 |
/* Section type */
|
780 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
781 |
qemu_put_be32(f, se->section_id); |
782 |
|
783 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
784 |
} |
785 |
|
786 |
for(se = first_se; se != NULL; se = se->next) { |
787 |
int len;
|
788 |
|
789 |
if (se->save_state == NULL) |
790 |
continue;
|
791 |
|
792 |
/* Section type */
|
793 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
794 |
qemu_put_be32(f, se->section_id); |
795 |
|
796 |
/* ID string */
|
797 |
len = strlen(se->idstr); |
798 |
qemu_put_byte(f, len); |
799 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
800 |
|
801 |
qemu_put_be32(f, se->instance_id); |
802 |
qemu_put_be32(f, se->version_id); |
803 |
|
804 |
se->save_state(f, se->opaque); |
805 |
} |
806 |
|
807 |
qemu_put_byte(f, QEMU_VM_EOF); |
808 |
|
809 |
if (qemu_file_has_error(f))
|
810 |
return -EIO;
|
811 |
|
812 |
return 0; |
813 |
} |
814 |
|
815 |
int qemu_savevm_state(QEMUFile *f)
|
816 |
{ |
817 |
int saved_vm_running;
|
818 |
int ret;
|
819 |
|
820 |
saved_vm_running = vm_running; |
821 |
vm_stop(0);
|
822 |
|
823 |
bdrv_flush_all(); |
824 |
|
825 |
ret = qemu_savevm_state_begin(f); |
826 |
if (ret < 0) |
827 |
goto out;
|
828 |
|
829 |
do {
|
830 |
ret = qemu_savevm_state_iterate(f); |
831 |
if (ret < 0) |
832 |
goto out;
|
833 |
} while (ret == 0); |
834 |
|
835 |
ret = qemu_savevm_state_complete(f); |
836 |
|
837 |
out:
|
838 |
if (qemu_file_has_error(f))
|
839 |
ret = -EIO; |
840 |
|
841 |
if (!ret && saved_vm_running)
|
842 |
vm_start(); |
843 |
|
844 |
return ret;
|
845 |
} |
846 |
|
847 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
848 |
{ |
849 |
SaveStateEntry *se; |
850 |
|
851 |
for(se = first_se; se != NULL; se = se->next) { |
852 |
if (!strcmp(se->idstr, idstr) &&
|
853 |
instance_id == se->instance_id) |
854 |
return se;
|
855 |
} |
856 |
return NULL; |
857 |
} |
858 |
|
859 |
typedef struct LoadStateEntry { |
860 |
SaveStateEntry *se; |
861 |
int section_id;
|
862 |
int version_id;
|
863 |
struct LoadStateEntry *next;
|
864 |
} LoadStateEntry; |
865 |
|
866 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
867 |
{ |
868 |
SaveStateEntry *se; |
869 |
int len, ret, instance_id, record_len, version_id;
|
870 |
int64_t total_len, end_pos, cur_pos; |
871 |
char idstr[256]; |
872 |
|
873 |
total_len = qemu_get_be64(f); |
874 |
end_pos = total_len + qemu_ftell(f); |
875 |
for(;;) {
|
876 |
if (qemu_ftell(f) >= end_pos)
|
877 |
break;
|
878 |
len = qemu_get_byte(f); |
879 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
880 |
idstr[len] = '\0';
|
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); |
886 |
if (!se) {
|
887 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
888 |
instance_id, idstr); |
889 |
} else {
|
890 |
ret = se->load_state(f, se->opaque, version_id); |
891 |
if (ret < 0) { |
892 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
893 |
instance_id, idstr); |
894 |
return ret;
|
895 |
} |
896 |
} |
897 |
/* always seek to exact end of record */
|
898 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
899 |
} |
900 |
|
901 |
if (qemu_file_has_error(f))
|
902 |
return -EIO;
|
903 |
|
904 |
return 0; |
905 |
} |
906 |
|
907 |
int qemu_loadvm_state(QEMUFile *f)
|
908 |
{ |
909 |
LoadStateEntry *first_le = NULL;
|
910 |
uint8_t section_type; |
911 |
unsigned int v; |
912 |
int ret;
|
913 |
|
914 |
v = qemu_get_be32(f); |
915 |
if (v != QEMU_VM_FILE_MAGIC)
|
916 |
return -EINVAL;
|
917 |
|
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)
|
922 |
return -ENOTSUP;
|
923 |
|
924 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
925 |
uint32_t instance_id, version_id, section_id; |
926 |
LoadStateEntry *le; |
927 |
SaveStateEntry *se; |
928 |
char idstr[257]; |
929 |
int len;
|
930 |
|
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); |
938 |
idstr[len] = 0;
|
939 |
instance_id = qemu_get_be32(f); |
940 |
version_id = qemu_get_be32(f); |
941 |
|
942 |
/* Find savevm section */
|
943 |
se = find_se(idstr, instance_id); |
944 |
if (se == NULL) { |
945 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
946 |
ret = -EINVAL; |
947 |
goto out;
|
948 |
} |
949 |
|
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); |
954 |
ret = -EINVAL; |
955 |
goto out;
|
956 |
} |
957 |
|
958 |
/* Add entry */
|
959 |
le = qemu_mallocz(sizeof(*le));
|
960 |
|
961 |
le->se = se; |
962 |
le->section_id = section_id; |
963 |
le->version_id = version_id; |
964 |
le->next = first_le; |
965 |
first_le = le; |
966 |
|
967 |
le->se->load_state(f, le->se->opaque, le->version_id); |
968 |
break;
|
969 |
case QEMU_VM_SECTION_PART:
|
970 |
case QEMU_VM_SECTION_END:
|
971 |
section_id = qemu_get_be32(f); |
972 |
|
973 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
974 |
if (le == NULL) { |
975 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
976 |
ret = -EINVAL; |
977 |
goto out;
|
978 |
} |
979 |
|
980 |
le->se->load_state(f, le->se->opaque, le->version_id); |
981 |
break;
|
982 |
default:
|
983 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
984 |
ret = -EINVAL; |
985 |
goto out;
|
986 |
} |
987 |
} |
988 |
|
989 |
ret = 0;
|
990 |
|
991 |
out:
|
992 |
while (first_le) {
|
993 |
LoadStateEntry *le = first_le; |
994 |
first_le = first_le->next; |
995 |
qemu_free(le); |
996 |
} |
997 |
|
998 |
if (qemu_file_has_error(f))
|
999 |
ret = -EIO; |
1000 |
|
1001 |
return ret;
|
1002 |
} |
1003 |
|
1004 |
/* device can contain snapshots */
|
1005 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1006 |
{ |
1007 |
return (bs &&
|
1008 |
!bdrv_is_removable(bs) && |
1009 |
!bdrv_is_read_only(bs)); |
1010 |
} |
1011 |
|
1012 |
/* device must be snapshots in order to have a reliable snapshot */
|
1013 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1014 |
{ |
1015 |
return (bs &&
|
1016 |
!bdrv_is_removable(bs) && |
1017 |
!bdrv_is_read_only(bs)); |
1018 |
} |
1019 |
|
1020 |
static BlockDriverState *get_bs_snapshots(void) |
1021 |
{ |
1022 |
BlockDriverState *bs; |
1023 |
int i;
|
1024 |
|
1025 |
if (bs_snapshots)
|
1026 |
return bs_snapshots;
|
1027 |
for(i = 0; i <= nb_drives; i++) { |
1028 |
bs = drives_table[i].bdrv; |
1029 |
if (bdrv_can_snapshot(bs))
|
1030 |
goto ok;
|
1031 |
} |
1032 |
return NULL; |
1033 |
ok:
|
1034 |
bs_snapshots = bs; |
1035 |
return bs;
|
1036 |
} |
1037 |
|
1038 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1039 |
const char *name) |
1040 |
{ |
1041 |
QEMUSnapshotInfo *sn_tab, *sn; |
1042 |
int nb_sns, i, ret;
|
1043 |
|
1044 |
ret = -ENOENT; |
1045 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1046 |
if (nb_sns < 0) |
1047 |
return ret;
|
1048 |
for(i = 0; i < nb_sns; i++) { |
1049 |
sn = &sn_tab[i]; |
1050 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1051 |
*sn_info = *sn; |
1052 |
ret = 0;
|
1053 |
break;
|
1054 |
} |
1055 |
} |
1056 |
qemu_free(sn_tab); |
1057 |
return ret;
|
1058 |
} |
1059 |
|
1060 |
void do_savevm(Monitor *mon, const char *name) |
1061 |
{ |
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; |
1066 |
QEMUFile *f; |
1067 |
int saved_vm_running;
|
1068 |
uint32_t vm_state_size; |
1069 |
#ifdef _WIN32
|
1070 |
struct _timeb tb;
|
1071 |
#else
|
1072 |
struct timeval tv;
|
1073 |
#endif
|
1074 |
|
1075 |
bs = get_bs_snapshots(); |
1076 |
if (!bs) {
|
1077 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1078 |
return;
|
1079 |
} |
1080 |
|
1081 |
/* ??? Should this occur after vm_stop? */
|
1082 |
qemu_aio_flush(); |
1083 |
|
1084 |
saved_vm_running = vm_running; |
1085 |
vm_stop(0);
|
1086 |
|
1087 |
must_delete = 0;
|
1088 |
if (name) {
|
1089 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1090 |
if (ret >= 0) { |
1091 |
must_delete = 1;
|
1092 |
} |
1093 |
} |
1094 |
memset(sn, 0, sizeof(*sn)); |
1095 |
if (must_delete) {
|
1096 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1097 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1098 |
} else {
|
1099 |
if (name)
|
1100 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1101 |
} |
1102 |
|
1103 |
/* fill auxiliary fields */
|
1104 |
#ifdef _WIN32
|
1105 |
_ftime(&tb); |
1106 |
sn->date_sec = tb.time; |
1107 |
sn->date_nsec = tb.millitm * 1000000;
|
1108 |
#else
|
1109 |
gettimeofday(&tv, NULL);
|
1110 |
sn->date_sec = tv.tv_sec; |
1111 |
sn->date_nsec = tv.tv_usec * 1000;
|
1112 |
#endif
|
1113 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1114 |
|
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)); |
1118 |
goto the_end;
|
1119 |
} |
1120 |
|
1121 |
/* save the VM state */
|
1122 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
1123 |
if (!f) {
|
1124 |
monitor_printf(mon, "Could not open VM state file\n");
|
1125 |
goto the_end;
|
1126 |
} |
1127 |
ret = qemu_savevm_state(f); |
1128 |
vm_state_size = qemu_ftell(f); |
1129 |
qemu_fclose(f); |
1130 |
if (ret < 0) { |
1131 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1132 |
goto the_end;
|
1133 |
} |
1134 |
|
1135 |
/* create the snapshots */
|
1136 |
|
1137 |
for(i = 0; i < nb_drives; i++) { |
1138 |
bs1 = drives_table[i].bdrv; |
1139 |
if (bdrv_has_snapshot(bs1)) {
|
1140 |
if (must_delete) {
|
1141 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1142 |
if (ret < 0) { |
1143 |
monitor_printf(mon, |
1144 |
"Error while deleting snapshot on '%s'\n",
|
1145 |
bdrv_get_device_name(bs1)); |
1146 |
} |
1147 |
} |
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); |
1151 |
if (ret < 0) { |
1152 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1153 |
bdrv_get_device_name(bs1)); |
1154 |
} |
1155 |
} |
1156 |
} |
1157 |
|
1158 |
the_end:
|
1159 |
if (saved_vm_running)
|
1160 |
vm_start(); |
1161 |
} |
1162 |
|
1163 |
void do_loadvm(Monitor *mon, const char *name) |
1164 |
{ |
1165 |
BlockDriverState *bs, *bs1; |
1166 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1167 |
QEMUSnapshotInfo sn; |
1168 |
QEMUFile *f; |
1169 |
int i, ret;
|
1170 |
int saved_vm_running;
|
1171 |
|
1172 |
bs = get_bs_snapshots(); |
1173 |
if (!bs) {
|
1174 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1175 |
return;
|
1176 |
} |
1177 |
|
1178 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1179 |
qemu_aio_flush(); |
1180 |
|
1181 |
saved_vm_running = vm_running; |
1182 |
vm_stop(0);
|
1183 |
|
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); |
1188 |
if (ret < 0) { |
1189 |
if (bs != bs1)
|
1190 |
monitor_printf(mon, "Warning: ");
|
1191 |
switch(ret) {
|
1192 |
case -ENOTSUP:
|
1193 |
monitor_printf(mon, |
1194 |
"Snapshots not supported on device '%s'\n",
|
1195 |
bdrv_get_device_name(bs1)); |
1196 |
break;
|
1197 |
case -ENOENT:
|
1198 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1199 |
"device '%s'\n",
|
1200 |
name, bdrv_get_device_name(bs1)); |
1201 |
break;
|
1202 |
default:
|
1203 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1204 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1205 |
break;
|
1206 |
} |
1207 |
/* fatal on snapshot block device */
|
1208 |
if (bs == bs1)
|
1209 |
goto the_end;
|
1210 |
} |
1211 |
} |
1212 |
} |
1213 |
|
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)); |
1217 |
return;
|
1218 |
} |
1219 |
|
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)) |
1223 |
goto the_end;
|
1224 |
|
1225 |
/* restore the VM state */
|
1226 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
1227 |
if (!f) {
|
1228 |
monitor_printf(mon, "Could not open VM state file\n");
|
1229 |
goto the_end;
|
1230 |
} |
1231 |
ret = qemu_loadvm_state(f); |
1232 |
qemu_fclose(f); |
1233 |
if (ret < 0) { |
1234 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1235 |
} |
1236 |
the_end:
|
1237 |
if (saved_vm_running)
|
1238 |
vm_start(); |
1239 |
} |
1240 |
|
1241 |
void do_delvm(Monitor *mon, const char *name) |
1242 |
{ |
1243 |
BlockDriverState *bs, *bs1; |
1244 |
int i, ret;
|
1245 |
|
1246 |
bs = get_bs_snapshots(); |
1247 |
if (!bs) {
|
1248 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1249 |
return;
|
1250 |
} |
1251 |
|
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); |
1256 |
if (ret < 0) { |
1257 |
if (ret == -ENOTSUP)
|
1258 |
monitor_printf(mon, |
1259 |
"Snapshots not supported on device '%s'\n",
|
1260 |
bdrv_get_device_name(bs1)); |
1261 |
else
|
1262 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1263 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1264 |
} |
1265 |
} |
1266 |
} |
1267 |
} |
1268 |
|
1269 |
void do_info_snapshots(Monitor *mon)
|
1270 |
{ |
1271 |
BlockDriverState *bs, *bs1; |
1272 |
QEMUSnapshotInfo *sn_tab, *sn; |
1273 |
int nb_sns, i;
|
1274 |
char buf[256]; |
1275 |
|
1276 |
bs = get_bs_snapshots(); |
1277 |
if (!bs) {
|
1278 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1279 |
return;
|
1280 |
} |
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)) {
|
1285 |
if (bs == bs1)
|
1286 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1287 |
} |
1288 |
} |
1289 |
monitor_printf(mon, "\n");
|
1290 |
|
1291 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1292 |
if (nb_sns < 0) { |
1293 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1294 |
return;
|
1295 |
} |
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++) { |
1300 |
sn = &sn_tab[i]; |
1301 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1302 |
} |
1303 |
qemu_free(sn_tab); |
1304 |
} |