root / savevm.c @ 0497d2f4
History | View | Annotate | Download (30.9 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 _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 _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 <malloc.h> |
75 |
#include <sys/timeb.h> |
76 |
#include <mmsystem.h> |
77 |
#define getopt_long_only getopt_long
|
78 |
#define memalign(align, size) malloc(size)
|
79 |
#endif
|
80 |
|
81 |
#include "qemu-common.h" |
82 |
#include "hw/hw.h" |
83 |
#include "net.h" |
84 |
#include "monitor.h" |
85 |
#include "sysemu.h" |
86 |
#include "qemu-timer.h" |
87 |
#include "qemu-char.h" |
88 |
#include "block.h" |
89 |
#include "audio/audio.h" |
90 |
#include "migration.h" |
91 |
#include "qemu_socket.h" |
92 |
|
93 |
/* point to the block driver where the snapshots are managed */
|
94 |
static BlockDriverState *bs_snapshots;
|
95 |
|
96 |
#define SELF_ANNOUNCE_ROUNDS 5 |
97 |
#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
98 |
//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
|
99 |
#define EXPERIMENTAL_MAGIC 0xf1f23f4f |
100 |
|
101 |
static int announce_self_create(uint8_t *buf, |
102 |
uint8_t *mac_addr) |
103 |
{ |
104 |
uint32_t magic = EXPERIMENTAL_MAGIC; |
105 |
uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
106 |
|
107 |
/* FIXME: should we send a different packet (arp/rarp/ping)? */
|
108 |
|
109 |
memset(buf, 0xff, 6); /* h_dst */ |
110 |
memcpy(buf + 6, mac_addr, 6); /* h_src */ |
111 |
memcpy(buf + 12, &proto, 2); /* h_proto */ |
112 |
memcpy(buf + 14, &magic, 4); /* magic */ |
113 |
|
114 |
return 18; /* len */ |
115 |
} |
116 |
|
117 |
void qemu_announce_self(void) |
118 |
{ |
119 |
int i, j, len;
|
120 |
VLANState *vlan; |
121 |
VLANClientState *vc; |
122 |
uint8_t buf[256];
|
123 |
|
124 |
for (i = 0; i < nb_nics; i++) { |
125 |
len = announce_self_create(buf, nd_table[i].macaddr); |
126 |
vlan = nd_table[i].vlan; |
127 |
for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
128 |
for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++) |
129 |
vc->fd_read(vc->opaque, buf, len); |
130 |
} |
131 |
} |
132 |
} |
133 |
|
134 |
/***********************************************************/
|
135 |
/* savevm/loadvm support */
|
136 |
|
137 |
#define IO_BUF_SIZE 32768 |
138 |
|
139 |
struct QEMUFile {
|
140 |
QEMUFilePutBufferFunc *put_buffer; |
141 |
QEMUFileGetBufferFunc *get_buffer; |
142 |
QEMUFileCloseFunc *close; |
143 |
QEMUFileRateLimit *rate_limit; |
144 |
void *opaque;
|
145 |
int is_write;
|
146 |
|
147 |
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
148 |
when reading */
|
149 |
int buf_index;
|
150 |
int buf_size; /* 0 when writing */ |
151 |
uint8_t buf[IO_BUF_SIZE]; |
152 |
|
153 |
int has_error;
|
154 |
}; |
155 |
|
156 |
typedef struct QEMUFilePopen |
157 |
{ |
158 |
FILE *popen_file; |
159 |
QEMUFile *file; |
160 |
} QEMUFilePopen; |
161 |
|
162 |
typedef struct QEMUFileSocket |
163 |
{ |
164 |
int fd;
|
165 |
QEMUFile *file; |
166 |
} QEMUFileSocket; |
167 |
|
168 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
169 |
{ |
170 |
QEMUFileSocket *s = opaque; |
171 |
ssize_t len; |
172 |
|
173 |
do {
|
174 |
len = recv(s->fd, buf, size, 0);
|
175 |
} while (len == -1 && socket_error() == EINTR); |
176 |
|
177 |
if (len == -1) |
178 |
len = -socket_error(); |
179 |
|
180 |
return len;
|
181 |
} |
182 |
|
183 |
static int socket_close(void *opaque) |
184 |
{ |
185 |
QEMUFileSocket *s = opaque; |
186 |
qemu_free(s); |
187 |
return 0; |
188 |
} |
189 |
|
190 |
static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
191 |
{ |
192 |
QEMUFilePopen *s = opaque; |
193 |
return fwrite(buf, 1, size, s->popen_file); |
194 |
} |
195 |
|
196 |
static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
197 |
{ |
198 |
QEMUFilePopen *s = opaque; |
199 |
return fread(buf, 1, size, s->popen_file); |
200 |
} |
201 |
|
202 |
static int popen_close(void *opaque) |
203 |
{ |
204 |
QEMUFilePopen *s = opaque; |
205 |
pclose(s->popen_file); |
206 |
qemu_free(s); |
207 |
return 0; |
208 |
} |
209 |
|
210 |
QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
211 |
{ |
212 |
QEMUFilePopen *s; |
213 |
|
214 |
if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
215 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
216 |
return NULL; |
217 |
} |
218 |
|
219 |
s = qemu_mallocz(sizeof(QEMUFilePopen));
|
220 |
|
221 |
s->popen_file = popen_file; |
222 |
|
223 |
if(mode[0] == 'r') { |
224 |
s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL); |
225 |
} else {
|
226 |
s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL); |
227 |
} |
228 |
fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
|
229 |
return s->file;
|
230 |
} |
231 |
|
232 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
233 |
{ |
234 |
FILE *popen_file; |
235 |
|
236 |
popen_file = popen(command, mode); |
237 |
if(popen_file == NULL) { |
238 |
return NULL; |
239 |
} |
240 |
|
241 |
return qemu_popen(popen_file, mode);
|
242 |
} |
243 |
|
244 |
QEMUFile *qemu_fopen_socket(int fd)
|
245 |
{ |
246 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
247 |
|
248 |
s->fd = fd; |
249 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL); |
250 |
return s->file;
|
251 |
} |
252 |
|
253 |
typedef struct QEMUFileStdio |
254 |
{ |
255 |
FILE *outfile; |
256 |
} QEMUFileStdio; |
257 |
|
258 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
259 |
int64_t pos, int size)
|
260 |
{ |
261 |
QEMUFileStdio *s = opaque; |
262 |
fseek(s->outfile, pos, SEEK_SET); |
263 |
fwrite(buf, 1, size, s->outfile);
|
264 |
return size;
|
265 |
} |
266 |
|
267 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
268 |
{ |
269 |
QEMUFileStdio *s = opaque; |
270 |
fseek(s->outfile, pos, SEEK_SET); |
271 |
return fread(buf, 1, size, s->outfile); |
272 |
} |
273 |
|
274 |
static int file_close(void *opaque) |
275 |
{ |
276 |
QEMUFileStdio *s = opaque; |
277 |
fclose(s->outfile); |
278 |
qemu_free(s); |
279 |
return 0; |
280 |
} |
281 |
|
282 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
283 |
{ |
284 |
QEMUFileStdio *s; |
285 |
|
286 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
287 |
|
288 |
s->outfile = fopen(filename, mode); |
289 |
if (!s->outfile)
|
290 |
goto fail;
|
291 |
|
292 |
if (!strcmp(mode, "wb")) |
293 |
return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL); |
294 |
else if (!strcmp(mode, "rb")) |
295 |
return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL); |
296 |
|
297 |
fail:
|
298 |
if (s->outfile)
|
299 |
fclose(s->outfile); |
300 |
qemu_free(s); |
301 |
return NULL; |
302 |
} |
303 |
|
304 |
typedef struct QEMUFileBdrv |
305 |
{ |
306 |
BlockDriverState *bs; |
307 |
int64_t base_offset; |
308 |
} QEMUFileBdrv; |
309 |
|
310 |
static int bdrv_put_buffer(void *opaque, const uint8_t *buf, |
311 |
int64_t pos, int size)
|
312 |
{ |
313 |
QEMUFileBdrv *s = opaque; |
314 |
bdrv_pwrite(s->bs, s->base_offset + pos, buf, size); |
315 |
return size;
|
316 |
} |
317 |
|
318 |
static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
319 |
{ |
320 |
QEMUFileBdrv *s = opaque; |
321 |
return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
|
322 |
} |
323 |
|
324 |
static int bdrv_fclose(void *opaque) |
325 |
{ |
326 |
QEMUFileBdrv *s = opaque; |
327 |
qemu_free(s); |
328 |
return 0; |
329 |
} |
330 |
|
331 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
332 |
{ |
333 |
QEMUFileBdrv *s; |
334 |
|
335 |
s = qemu_mallocz(sizeof(QEMUFileBdrv));
|
336 |
|
337 |
s->bs = bs; |
338 |
s->base_offset = offset; |
339 |
|
340 |
if (is_writable)
|
341 |
return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL); |
342 |
|
343 |
return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL); |
344 |
} |
345 |
|
346 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
347 |
QEMUFileGetBufferFunc *get_buffer, |
348 |
QEMUFileCloseFunc *close, |
349 |
QEMUFileRateLimit *rate_limit) |
350 |
{ |
351 |
QEMUFile *f; |
352 |
|
353 |
f = qemu_mallocz(sizeof(QEMUFile));
|
354 |
|
355 |
f->opaque = opaque; |
356 |
f->put_buffer = put_buffer; |
357 |
f->get_buffer = get_buffer; |
358 |
f->close = close; |
359 |
f->rate_limit = rate_limit; |
360 |
f->is_write = 0;
|
361 |
|
362 |
return f;
|
363 |
} |
364 |
|
365 |
int qemu_file_has_error(QEMUFile *f)
|
366 |
{ |
367 |
return f->has_error;
|
368 |
} |
369 |
|
370 |
void qemu_fflush(QEMUFile *f)
|
371 |
{ |
372 |
if (!f->put_buffer)
|
373 |
return;
|
374 |
|
375 |
if (f->is_write && f->buf_index > 0) { |
376 |
int len;
|
377 |
|
378 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
379 |
if (len > 0) |
380 |
f->buf_offset += f->buf_index; |
381 |
else
|
382 |
f->has_error = 1;
|
383 |
f->buf_index = 0;
|
384 |
} |
385 |
} |
386 |
|
387 |
static void qemu_fill_buffer(QEMUFile *f) |
388 |
{ |
389 |
int len;
|
390 |
|
391 |
if (!f->get_buffer)
|
392 |
return;
|
393 |
|
394 |
if (f->is_write)
|
395 |
abort(); |
396 |
|
397 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
398 |
if (len > 0) { |
399 |
f->buf_index = 0;
|
400 |
f->buf_size = len; |
401 |
f->buf_offset += len; |
402 |
} else if (len != -EAGAIN) |
403 |
f->has_error = 1;
|
404 |
} |
405 |
|
406 |
int qemu_fclose(QEMUFile *f)
|
407 |
{ |
408 |
int ret = 0; |
409 |
qemu_fflush(f); |
410 |
if (f->close)
|
411 |
ret = f->close(f->opaque); |
412 |
qemu_free(f); |
413 |
return ret;
|
414 |
} |
415 |
|
416 |
void qemu_file_put_notify(QEMUFile *f)
|
417 |
{ |
418 |
f->put_buffer(f->opaque, NULL, 0, 0); |
419 |
} |
420 |
|
421 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
422 |
{ |
423 |
int l;
|
424 |
|
425 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
426 |
fprintf(stderr, |
427 |
"Attempted to write to buffer while read buffer is not empty\n");
|
428 |
abort(); |
429 |
} |
430 |
|
431 |
while (!f->has_error && size > 0) { |
432 |
l = IO_BUF_SIZE - f->buf_index; |
433 |
if (l > size)
|
434 |
l = size; |
435 |
memcpy(f->buf + f->buf_index, buf, l); |
436 |
f->is_write = 1;
|
437 |
f->buf_index += l; |
438 |
buf += l; |
439 |
size -= l; |
440 |
if (f->buf_index >= IO_BUF_SIZE)
|
441 |
qemu_fflush(f); |
442 |
} |
443 |
} |
444 |
|
445 |
void qemu_put_byte(QEMUFile *f, int v) |
446 |
{ |
447 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
448 |
fprintf(stderr, |
449 |
"Attempted to write to buffer while read buffer is not empty\n");
|
450 |
abort(); |
451 |
} |
452 |
|
453 |
f->buf[f->buf_index++] = v; |
454 |
f->is_write = 1;
|
455 |
if (f->buf_index >= IO_BUF_SIZE)
|
456 |
qemu_fflush(f); |
457 |
} |
458 |
|
459 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
460 |
{ |
461 |
int size, l;
|
462 |
|
463 |
if (f->is_write)
|
464 |
abort(); |
465 |
|
466 |
size = size1; |
467 |
while (size > 0) { |
468 |
l = f->buf_size - f->buf_index; |
469 |
if (l == 0) { |
470 |
qemu_fill_buffer(f); |
471 |
l = f->buf_size - f->buf_index; |
472 |
if (l == 0) |
473 |
break;
|
474 |
} |
475 |
if (l > size)
|
476 |
l = size; |
477 |
memcpy(buf, f->buf + f->buf_index, l); |
478 |
f->buf_index += l; |
479 |
buf += l; |
480 |
size -= l; |
481 |
} |
482 |
return size1 - size;
|
483 |
} |
484 |
|
485 |
int qemu_get_byte(QEMUFile *f)
|
486 |
{ |
487 |
if (f->is_write)
|
488 |
abort(); |
489 |
|
490 |
if (f->buf_index >= f->buf_size) {
|
491 |
qemu_fill_buffer(f); |
492 |
if (f->buf_index >= f->buf_size)
|
493 |
return 0; |
494 |
} |
495 |
return f->buf[f->buf_index++];
|
496 |
} |
497 |
|
498 |
int64_t qemu_ftell(QEMUFile *f) |
499 |
{ |
500 |
return f->buf_offset - f->buf_size + f->buf_index;
|
501 |
} |
502 |
|
503 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
504 |
{ |
505 |
if (whence == SEEK_SET) {
|
506 |
/* nothing to do */
|
507 |
} else if (whence == SEEK_CUR) { |
508 |
pos += qemu_ftell(f); |
509 |
} else {
|
510 |
/* SEEK_END not supported */
|
511 |
return -1; |
512 |
} |
513 |
if (f->put_buffer) {
|
514 |
qemu_fflush(f); |
515 |
f->buf_offset = pos; |
516 |
} else {
|
517 |
f->buf_offset = pos; |
518 |
f->buf_index = 0;
|
519 |
f->buf_size = 0;
|
520 |
} |
521 |
return pos;
|
522 |
} |
523 |
|
524 |
int qemu_file_rate_limit(QEMUFile *f)
|
525 |
{ |
526 |
if (f->rate_limit)
|
527 |
return f->rate_limit(f->opaque);
|
528 |
|
529 |
return 0; |
530 |
} |
531 |
|
532 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
533 |
{ |
534 |
qemu_put_byte(f, v >> 8);
|
535 |
qemu_put_byte(f, v); |
536 |
} |
537 |
|
538 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
539 |
{ |
540 |
qemu_put_byte(f, v >> 24);
|
541 |
qemu_put_byte(f, v >> 16);
|
542 |
qemu_put_byte(f, v >> 8);
|
543 |
qemu_put_byte(f, v); |
544 |
} |
545 |
|
546 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
547 |
{ |
548 |
qemu_put_be32(f, v >> 32);
|
549 |
qemu_put_be32(f, v); |
550 |
} |
551 |
|
552 |
unsigned int qemu_get_be16(QEMUFile *f) |
553 |
{ |
554 |
unsigned int v; |
555 |
v = qemu_get_byte(f) << 8;
|
556 |
v |= qemu_get_byte(f); |
557 |
return v;
|
558 |
} |
559 |
|
560 |
unsigned int qemu_get_be32(QEMUFile *f) |
561 |
{ |
562 |
unsigned int v; |
563 |
v = qemu_get_byte(f) << 24;
|
564 |
v |= qemu_get_byte(f) << 16;
|
565 |
v |= qemu_get_byte(f) << 8;
|
566 |
v |= qemu_get_byte(f); |
567 |
return v;
|
568 |
} |
569 |
|
570 |
uint64_t qemu_get_be64(QEMUFile *f) |
571 |
{ |
572 |
uint64_t v; |
573 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
574 |
v |= qemu_get_be32(f); |
575 |
return v;
|
576 |
} |
577 |
|
578 |
typedef struct SaveStateEntry { |
579 |
char idstr[256]; |
580 |
int instance_id;
|
581 |
int version_id;
|
582 |
int section_id;
|
583 |
SaveLiveStateHandler *save_live_state; |
584 |
SaveStateHandler *save_state; |
585 |
LoadStateHandler *load_state; |
586 |
void *opaque;
|
587 |
struct SaveStateEntry *next;
|
588 |
} SaveStateEntry; |
589 |
|
590 |
static SaveStateEntry *first_se;
|
591 |
|
592 |
/* TODO: Individual devices generally have very little idea about the rest
|
593 |
of the system, so instance_id should be removed/replaced.
|
594 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
595 |
distinguishing id for all instances of your device class. */
|
596 |
int register_savevm_live(const char *idstr, |
597 |
int instance_id,
|
598 |
int version_id,
|
599 |
SaveLiveStateHandler *save_live_state, |
600 |
SaveStateHandler *save_state, |
601 |
LoadStateHandler *load_state, |
602 |
void *opaque)
|
603 |
{ |
604 |
SaveStateEntry *se, **pse; |
605 |
static int global_section_id; |
606 |
|
607 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
608 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
609 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
610 |
se->version_id = version_id; |
611 |
se->section_id = global_section_id++; |
612 |
se->save_live_state = save_live_state; |
613 |
se->save_state = save_state; |
614 |
se->load_state = load_state; |
615 |
se->opaque = opaque; |
616 |
se->next = NULL;
|
617 |
|
618 |
/* add at the end of list */
|
619 |
pse = &first_se; |
620 |
while (*pse != NULL) { |
621 |
if (instance_id == -1 |
622 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
623 |
&& se->instance_id <= (*pse)->instance_id) |
624 |
se->instance_id = (*pse)->instance_id + 1;
|
625 |
pse = &(*pse)->next; |
626 |
} |
627 |
*pse = se; |
628 |
return 0; |
629 |
} |
630 |
|
631 |
int register_savevm(const char *idstr, |
632 |
int instance_id,
|
633 |
int version_id,
|
634 |
SaveStateHandler *save_state, |
635 |
LoadStateHandler *load_state, |
636 |
void *opaque)
|
637 |
{ |
638 |
return register_savevm_live(idstr, instance_id, version_id,
|
639 |
NULL, save_state, load_state, opaque);
|
640 |
} |
641 |
|
642 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
643 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
644 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
645 |
|
646 |
#define QEMU_VM_EOF 0x00 |
647 |
#define QEMU_VM_SECTION_START 0x01 |
648 |
#define QEMU_VM_SECTION_PART 0x02 |
649 |
#define QEMU_VM_SECTION_END 0x03 |
650 |
#define QEMU_VM_SECTION_FULL 0x04 |
651 |
|
652 |
int qemu_savevm_state_begin(QEMUFile *f)
|
653 |
{ |
654 |
SaveStateEntry *se; |
655 |
|
656 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
657 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
658 |
|
659 |
for (se = first_se; se != NULL; se = se->next) { |
660 |
int len;
|
661 |
|
662 |
if (se->save_live_state == NULL) |
663 |
continue;
|
664 |
|
665 |
/* Section type */
|
666 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
667 |
qemu_put_be32(f, se->section_id); |
668 |
|
669 |
/* ID string */
|
670 |
len = strlen(se->idstr); |
671 |
qemu_put_byte(f, len); |
672 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
673 |
|
674 |
qemu_put_be32(f, se->instance_id); |
675 |
qemu_put_be32(f, se->version_id); |
676 |
|
677 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
678 |
} |
679 |
|
680 |
if (qemu_file_has_error(f))
|
681 |
return -EIO;
|
682 |
|
683 |
return 0; |
684 |
} |
685 |
|
686 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
687 |
{ |
688 |
SaveStateEntry *se; |
689 |
int ret = 1; |
690 |
|
691 |
for (se = first_se; se != NULL; se = se->next) { |
692 |
if (se->save_live_state == NULL) |
693 |
continue;
|
694 |
|
695 |
/* Section type */
|
696 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
697 |
qemu_put_be32(f, se->section_id); |
698 |
|
699 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
700 |
} |
701 |
|
702 |
if (ret)
|
703 |
return 1; |
704 |
|
705 |
if (qemu_file_has_error(f))
|
706 |
return -EIO;
|
707 |
|
708 |
return 0; |
709 |
} |
710 |
|
711 |
int qemu_savevm_state_complete(QEMUFile *f)
|
712 |
{ |
713 |
SaveStateEntry *se; |
714 |
|
715 |
for (se = first_se; se != NULL; se = se->next) { |
716 |
if (se->save_live_state == NULL) |
717 |
continue;
|
718 |
|
719 |
/* Section type */
|
720 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
721 |
qemu_put_be32(f, se->section_id); |
722 |
|
723 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
724 |
} |
725 |
|
726 |
for(se = first_se; se != NULL; se = se->next) { |
727 |
int len;
|
728 |
|
729 |
if (se->save_state == NULL) |
730 |
continue;
|
731 |
|
732 |
/* Section type */
|
733 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
734 |
qemu_put_be32(f, se->section_id); |
735 |
|
736 |
/* ID string */
|
737 |
len = strlen(se->idstr); |
738 |
qemu_put_byte(f, len); |
739 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
740 |
|
741 |
qemu_put_be32(f, se->instance_id); |
742 |
qemu_put_be32(f, se->version_id); |
743 |
|
744 |
se->save_state(f, se->opaque); |
745 |
} |
746 |
|
747 |
qemu_put_byte(f, QEMU_VM_EOF); |
748 |
|
749 |
if (qemu_file_has_error(f))
|
750 |
return -EIO;
|
751 |
|
752 |
return 0; |
753 |
} |
754 |
|
755 |
int qemu_savevm_state(QEMUFile *f)
|
756 |
{ |
757 |
int saved_vm_running;
|
758 |
int ret;
|
759 |
|
760 |
saved_vm_running = vm_running; |
761 |
vm_stop(0);
|
762 |
|
763 |
bdrv_flush_all(); |
764 |
|
765 |
ret = qemu_savevm_state_begin(f); |
766 |
if (ret < 0) |
767 |
goto out;
|
768 |
|
769 |
do {
|
770 |
ret = qemu_savevm_state_iterate(f); |
771 |
if (ret < 0) |
772 |
goto out;
|
773 |
} while (ret == 0); |
774 |
|
775 |
ret = qemu_savevm_state_complete(f); |
776 |
|
777 |
out:
|
778 |
if (qemu_file_has_error(f))
|
779 |
ret = -EIO; |
780 |
|
781 |
if (!ret && saved_vm_running)
|
782 |
vm_start(); |
783 |
|
784 |
return ret;
|
785 |
} |
786 |
|
787 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
788 |
{ |
789 |
SaveStateEntry *se; |
790 |
|
791 |
for(se = first_se; se != NULL; se = se->next) { |
792 |
if (!strcmp(se->idstr, idstr) &&
|
793 |
instance_id == se->instance_id) |
794 |
return se;
|
795 |
} |
796 |
return NULL; |
797 |
} |
798 |
|
799 |
typedef struct LoadStateEntry { |
800 |
SaveStateEntry *se; |
801 |
int section_id;
|
802 |
int version_id;
|
803 |
struct LoadStateEntry *next;
|
804 |
} LoadStateEntry; |
805 |
|
806 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
807 |
{ |
808 |
SaveStateEntry *se; |
809 |
int len, ret, instance_id, record_len, version_id;
|
810 |
int64_t total_len, end_pos, cur_pos; |
811 |
char idstr[256]; |
812 |
|
813 |
total_len = qemu_get_be64(f); |
814 |
end_pos = total_len + qemu_ftell(f); |
815 |
for(;;) {
|
816 |
if (qemu_ftell(f) >= end_pos)
|
817 |
break;
|
818 |
len = qemu_get_byte(f); |
819 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
820 |
idstr[len] = '\0';
|
821 |
instance_id = qemu_get_be32(f); |
822 |
version_id = qemu_get_be32(f); |
823 |
record_len = qemu_get_be32(f); |
824 |
cur_pos = qemu_ftell(f); |
825 |
se = find_se(idstr, instance_id); |
826 |
if (!se) {
|
827 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
828 |
instance_id, idstr); |
829 |
} else {
|
830 |
ret = se->load_state(f, se->opaque, version_id); |
831 |
if (ret < 0) { |
832 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
833 |
instance_id, idstr); |
834 |
} |
835 |
} |
836 |
/* always seek to exact end of record */
|
837 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
838 |
} |
839 |
|
840 |
if (qemu_file_has_error(f))
|
841 |
return -EIO;
|
842 |
|
843 |
return 0; |
844 |
} |
845 |
|
846 |
int qemu_loadvm_state(QEMUFile *f)
|
847 |
{ |
848 |
LoadStateEntry *first_le = NULL;
|
849 |
uint8_t section_type; |
850 |
unsigned int v; |
851 |
int ret;
|
852 |
|
853 |
v = qemu_get_be32(f); |
854 |
if (v != QEMU_VM_FILE_MAGIC)
|
855 |
return -EINVAL;
|
856 |
|
857 |
v = qemu_get_be32(f); |
858 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
859 |
return qemu_loadvm_state_v2(f);
|
860 |
if (v != QEMU_VM_FILE_VERSION)
|
861 |
return -ENOTSUP;
|
862 |
|
863 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
864 |
uint32_t instance_id, version_id, section_id; |
865 |
LoadStateEntry *le; |
866 |
SaveStateEntry *se; |
867 |
char idstr[257]; |
868 |
int len;
|
869 |
|
870 |
switch (section_type) {
|
871 |
case QEMU_VM_SECTION_START:
|
872 |
case QEMU_VM_SECTION_FULL:
|
873 |
/* Read section start */
|
874 |
section_id = qemu_get_be32(f); |
875 |
len = qemu_get_byte(f); |
876 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
877 |
idstr[len] = 0;
|
878 |
instance_id = qemu_get_be32(f); |
879 |
version_id = qemu_get_be32(f); |
880 |
|
881 |
/* Find savevm section */
|
882 |
se = find_se(idstr, instance_id); |
883 |
if (se == NULL) { |
884 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
885 |
ret = -EINVAL; |
886 |
goto out;
|
887 |
} |
888 |
|
889 |
/* Validate version */
|
890 |
if (version_id > se->version_id) {
|
891 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
892 |
version_id, idstr, se->version_id); |
893 |
ret = -EINVAL; |
894 |
goto out;
|
895 |
} |
896 |
|
897 |
/* Add entry */
|
898 |
le = qemu_mallocz(sizeof(*le));
|
899 |
|
900 |
le->se = se; |
901 |
le->section_id = section_id; |
902 |
le->version_id = version_id; |
903 |
le->next = first_le; |
904 |
first_le = le; |
905 |
|
906 |
le->se->load_state(f, le->se->opaque, le->version_id); |
907 |
break;
|
908 |
case QEMU_VM_SECTION_PART:
|
909 |
case QEMU_VM_SECTION_END:
|
910 |
section_id = qemu_get_be32(f); |
911 |
|
912 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
913 |
if (le == NULL) { |
914 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
915 |
ret = -EINVAL; |
916 |
goto out;
|
917 |
} |
918 |
|
919 |
le->se->load_state(f, le->se->opaque, le->version_id); |
920 |
break;
|
921 |
default:
|
922 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
923 |
ret = -EINVAL; |
924 |
goto out;
|
925 |
} |
926 |
} |
927 |
|
928 |
ret = 0;
|
929 |
|
930 |
out:
|
931 |
while (first_le) {
|
932 |
LoadStateEntry *le = first_le; |
933 |
first_le = first_le->next; |
934 |
qemu_free(le); |
935 |
} |
936 |
|
937 |
if (qemu_file_has_error(f))
|
938 |
ret = -EIO; |
939 |
|
940 |
return ret;
|
941 |
} |
942 |
|
943 |
/* device can contain snapshots */
|
944 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
945 |
{ |
946 |
return (bs &&
|
947 |
!bdrv_is_removable(bs) && |
948 |
!bdrv_is_read_only(bs)); |
949 |
} |
950 |
|
951 |
/* device must be snapshots in order to have a reliable snapshot */
|
952 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
953 |
{ |
954 |
return (bs &&
|
955 |
!bdrv_is_removable(bs) && |
956 |
!bdrv_is_read_only(bs)); |
957 |
} |
958 |
|
959 |
static BlockDriverState *get_bs_snapshots(void) |
960 |
{ |
961 |
BlockDriverState *bs; |
962 |
int i;
|
963 |
|
964 |
if (bs_snapshots)
|
965 |
return bs_snapshots;
|
966 |
for(i = 0; i <= nb_drives; i++) { |
967 |
bs = drives_table[i].bdrv; |
968 |
if (bdrv_can_snapshot(bs))
|
969 |
goto ok;
|
970 |
} |
971 |
return NULL; |
972 |
ok:
|
973 |
bs_snapshots = bs; |
974 |
return bs;
|
975 |
} |
976 |
|
977 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
978 |
const char *name) |
979 |
{ |
980 |
QEMUSnapshotInfo *sn_tab, *sn; |
981 |
int nb_sns, i, ret;
|
982 |
|
983 |
ret = -ENOENT; |
984 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
985 |
if (nb_sns < 0) |
986 |
return ret;
|
987 |
for(i = 0; i < nb_sns; i++) { |
988 |
sn = &sn_tab[i]; |
989 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
990 |
*sn_info = *sn; |
991 |
ret = 0;
|
992 |
break;
|
993 |
} |
994 |
} |
995 |
qemu_free(sn_tab); |
996 |
return ret;
|
997 |
} |
998 |
|
999 |
void do_savevm(Monitor *mon, const char *name) |
1000 |
{ |
1001 |
BlockDriverState *bs, *bs1; |
1002 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1003 |
int must_delete, ret, i;
|
1004 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1005 |
QEMUFile *f; |
1006 |
int saved_vm_running;
|
1007 |
uint32_t vm_state_size; |
1008 |
#ifdef _WIN32
|
1009 |
struct _timeb tb;
|
1010 |
#else
|
1011 |
struct timeval tv;
|
1012 |
#endif
|
1013 |
|
1014 |
bs = get_bs_snapshots(); |
1015 |
if (!bs) {
|
1016 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1017 |
return;
|
1018 |
} |
1019 |
|
1020 |
/* ??? Should this occur after vm_stop? */
|
1021 |
qemu_aio_flush(); |
1022 |
|
1023 |
saved_vm_running = vm_running; |
1024 |
vm_stop(0);
|
1025 |
|
1026 |
must_delete = 0;
|
1027 |
if (name) {
|
1028 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1029 |
if (ret >= 0) { |
1030 |
must_delete = 1;
|
1031 |
} |
1032 |
} |
1033 |
memset(sn, 0, sizeof(*sn)); |
1034 |
if (must_delete) {
|
1035 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1036 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1037 |
} else {
|
1038 |
if (name)
|
1039 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1040 |
} |
1041 |
|
1042 |
/* fill auxiliary fields */
|
1043 |
#ifdef _WIN32
|
1044 |
_ftime(&tb); |
1045 |
sn->date_sec = tb.time; |
1046 |
sn->date_nsec = tb.millitm * 1000000;
|
1047 |
#else
|
1048 |
gettimeofday(&tv, NULL);
|
1049 |
sn->date_sec = tv.tv_sec; |
1050 |
sn->date_nsec = tv.tv_usec * 1000;
|
1051 |
#endif
|
1052 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1053 |
|
1054 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1055 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
1056 |
bdrv_get_device_name(bs)); |
1057 |
goto the_end;
|
1058 |
} |
1059 |
|
1060 |
/* save the VM state */
|
1061 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
1062 |
if (!f) {
|
1063 |
monitor_printf(mon, "Could not open VM state file\n");
|
1064 |
goto the_end;
|
1065 |
} |
1066 |
ret = qemu_savevm_state(f); |
1067 |
vm_state_size = qemu_ftell(f); |
1068 |
qemu_fclose(f); |
1069 |
if (ret < 0) { |
1070 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1071 |
goto the_end;
|
1072 |
} |
1073 |
|
1074 |
/* create the snapshots */
|
1075 |
|
1076 |
for(i = 0; i < nb_drives; i++) { |
1077 |
bs1 = drives_table[i].bdrv; |
1078 |
if (bdrv_has_snapshot(bs1)) {
|
1079 |
if (must_delete) {
|
1080 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1081 |
if (ret < 0) { |
1082 |
monitor_printf(mon, |
1083 |
"Error while deleting snapshot on '%s'\n",
|
1084 |
bdrv_get_device_name(bs1)); |
1085 |
} |
1086 |
} |
1087 |
/* Write VM state size only to the image that contains the state */
|
1088 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1089 |
ret = bdrv_snapshot_create(bs1, sn); |
1090 |
if (ret < 0) { |
1091 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1092 |
bdrv_get_device_name(bs1)); |
1093 |
} |
1094 |
} |
1095 |
} |
1096 |
|
1097 |
the_end:
|
1098 |
if (saved_vm_running)
|
1099 |
vm_start(); |
1100 |
} |
1101 |
|
1102 |
void do_loadvm(Monitor *mon, const char *name) |
1103 |
{ |
1104 |
BlockDriverState *bs, *bs1; |
1105 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1106 |
QEMUSnapshotInfo sn; |
1107 |
QEMUFile *f; |
1108 |
int i, ret;
|
1109 |
int saved_vm_running;
|
1110 |
|
1111 |
bs = get_bs_snapshots(); |
1112 |
if (!bs) {
|
1113 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1114 |
return;
|
1115 |
} |
1116 |
|
1117 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1118 |
qemu_aio_flush(); |
1119 |
|
1120 |
saved_vm_running = vm_running; |
1121 |
vm_stop(0);
|
1122 |
|
1123 |
for(i = 0; i <= nb_drives; i++) { |
1124 |
bs1 = drives_table[i].bdrv; |
1125 |
if (bdrv_has_snapshot(bs1)) {
|
1126 |
ret = bdrv_snapshot_goto(bs1, name); |
1127 |
if (ret < 0) { |
1128 |
if (bs != bs1)
|
1129 |
monitor_printf(mon, "Warning: ");
|
1130 |
switch(ret) {
|
1131 |
case -ENOTSUP:
|
1132 |
monitor_printf(mon, |
1133 |
"Snapshots not supported on device '%s'\n",
|
1134 |
bdrv_get_device_name(bs1)); |
1135 |
break;
|
1136 |
case -ENOENT:
|
1137 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1138 |
"device '%s'\n",
|
1139 |
name, bdrv_get_device_name(bs1)); |
1140 |
break;
|
1141 |
default:
|
1142 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1143 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1144 |
break;
|
1145 |
} |
1146 |
/* fatal on snapshot block device */
|
1147 |
if (bs == bs1)
|
1148 |
goto the_end;
|
1149 |
} |
1150 |
} |
1151 |
} |
1152 |
|
1153 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1154 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
1155 |
bdrv_get_device_name(bs)); |
1156 |
return;
|
1157 |
} |
1158 |
|
1159 |
/* Don't even try to load empty VM states */
|
1160 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1161 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1162 |
goto the_end;
|
1163 |
|
1164 |
/* restore the VM state */
|
1165 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
1166 |
if (!f) {
|
1167 |
monitor_printf(mon, "Could not open VM state file\n");
|
1168 |
goto the_end;
|
1169 |
} |
1170 |
ret = qemu_loadvm_state(f); |
1171 |
qemu_fclose(f); |
1172 |
if (ret < 0) { |
1173 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1174 |
} |
1175 |
the_end:
|
1176 |
if (saved_vm_running)
|
1177 |
vm_start(); |
1178 |
} |
1179 |
|
1180 |
void do_delvm(Monitor *mon, const char *name) |
1181 |
{ |
1182 |
BlockDriverState *bs, *bs1; |
1183 |
int i, ret;
|
1184 |
|
1185 |
bs = get_bs_snapshots(); |
1186 |
if (!bs) {
|
1187 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1188 |
return;
|
1189 |
} |
1190 |
|
1191 |
for(i = 0; i <= nb_drives; i++) { |
1192 |
bs1 = drives_table[i].bdrv; |
1193 |
if (bdrv_has_snapshot(bs1)) {
|
1194 |
ret = bdrv_snapshot_delete(bs1, name); |
1195 |
if (ret < 0) { |
1196 |
if (ret == -ENOTSUP)
|
1197 |
monitor_printf(mon, |
1198 |
"Snapshots not supported on device '%s'\n",
|
1199 |
bdrv_get_device_name(bs1)); |
1200 |
else
|
1201 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1202 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1203 |
} |
1204 |
} |
1205 |
} |
1206 |
} |
1207 |
|
1208 |
void do_info_snapshots(Monitor *mon)
|
1209 |
{ |
1210 |
BlockDriverState *bs, *bs1; |
1211 |
QEMUSnapshotInfo *sn_tab, *sn; |
1212 |
int nb_sns, i;
|
1213 |
char buf[256]; |
1214 |
|
1215 |
bs = get_bs_snapshots(); |
1216 |
if (!bs) {
|
1217 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1218 |
return;
|
1219 |
} |
1220 |
monitor_printf(mon, "Snapshot devices:");
|
1221 |
for(i = 0; i <= nb_drives; i++) { |
1222 |
bs1 = drives_table[i].bdrv; |
1223 |
if (bdrv_has_snapshot(bs1)) {
|
1224 |
if (bs == bs1)
|
1225 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1226 |
} |
1227 |
} |
1228 |
monitor_printf(mon, "\n");
|
1229 |
|
1230 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1231 |
if (nb_sns < 0) { |
1232 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1233 |
return;
|
1234 |
} |
1235 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1236 |
bdrv_get_device_name(bs)); |
1237 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1238 |
for(i = 0; i < nb_sns; i++) { |
1239 |
sn = &sn_tab[i]; |
1240 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1241 |
} |
1242 |
qemu_free(sn_tab); |
1243 |
} |