root / savevm.c @ bfb811ad
History | View | Annotate | Download (44.8 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 CONFIG_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 |
#include <arpa/inet.h> |
46 |
#include <dirent.h> |
47 |
#include <netdb.h> |
48 |
#include <sys/select.h> |
49 |
#ifdef CONFIG_BSD
|
50 |
#include <sys/stat.h> |
51 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
52 |
#include <libutil.h> |
53 |
#else
|
54 |
#include <util.h> |
55 |
#endif
|
56 |
#ifdef __linux__
|
57 |
#include <pty.h> |
58 |
#include <malloc.h> |
59 |
#include <linux/rtc.h> |
60 |
#endif
|
61 |
#endif
|
62 |
#endif
|
63 |
|
64 |
#ifdef _WIN32
|
65 |
#include <windows.h> |
66 |
#include <malloc.h> |
67 |
#include <sys/timeb.h> |
68 |
#include <mmsystem.h> |
69 |
#define getopt_long_only getopt_long
|
70 |
#define memalign(align, size) malloc(size)
|
71 |
#endif
|
72 |
|
73 |
#include "qemu-common.h" |
74 |
#include "hw/hw.h" |
75 |
#include "net.h" |
76 |
#include "monitor.h" |
77 |
#include "sysemu.h" |
78 |
#include "qemu-timer.h" |
79 |
#include "qemu-char.h" |
80 |
#include "block.h" |
81 |
#include "audio/audio.h" |
82 |
#include "migration.h" |
83 |
#include "qemu_socket.h" |
84 |
#include "qemu-queue.h" |
85 |
|
86 |
/* point to the block driver where the snapshots are managed */
|
87 |
static BlockDriverState *bs_snapshots;
|
88 |
|
89 |
#define SELF_ANNOUNCE_ROUNDS 5 |
90 |
|
91 |
#ifndef ETH_P_RARP
|
92 |
#define ETH_P_RARP 0x0835 |
93 |
#endif
|
94 |
#define ARP_HTYPE_ETH 0x0001 |
95 |
#define ARP_PTYPE_IP 0x0800 |
96 |
#define ARP_OP_REQUEST_REV 0x3 |
97 |
|
98 |
static int announce_self_create(uint8_t *buf, |
99 |
uint8_t *mac_addr) |
100 |
{ |
101 |
/* Ethernet header. */
|
102 |
memset(buf, 0xff, 6); /* destination MAC addr */ |
103 |
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
104 |
*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
105 |
|
106 |
/* RARP header. */
|
107 |
*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
108 |
*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
109 |
*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
110 |
*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
111 |
*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
112 |
memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
113 |
memset(buf + 28, 0x00, 4); /* source protocol addr */ |
114 |
memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
115 |
memset(buf + 38, 0x00, 4); /* target protocol addr */ |
116 |
|
117 |
/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
|
118 |
memset(buf + 42, 0x00, 18); |
119 |
|
120 |
return 60; /* len (FCS will be added by hardware) */ |
121 |
} |
122 |
|
123 |
static void qemu_announce_self_iter(NICState *nic, void *opaque) |
124 |
{ |
125 |
uint8_t buf[60];
|
126 |
int len;
|
127 |
|
128 |
len = announce_self_create(buf, nic->conf->macaddr.a); |
129 |
|
130 |
qemu_send_packet_raw(&nic->nc, buf, len); |
131 |
} |
132 |
|
133 |
|
134 |
static void qemu_announce_self_once(void *opaque) |
135 |
{ |
136 |
static int count = SELF_ANNOUNCE_ROUNDS; |
137 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
138 |
|
139 |
qemu_foreach_nic(qemu_announce_self_iter, NULL);
|
140 |
|
141 |
if (--count) {
|
142 |
/* delay 50ms, 150ms, 250ms, ... */
|
143 |
qemu_mod_timer(timer, qemu_get_clock(rt_clock) + |
144 |
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
145 |
} else {
|
146 |
qemu_del_timer(timer); |
147 |
qemu_free_timer(timer); |
148 |
} |
149 |
} |
150 |
|
151 |
void qemu_announce_self(void) |
152 |
{ |
153 |
static QEMUTimer *timer;
|
154 |
timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
155 |
qemu_announce_self_once(&timer); |
156 |
} |
157 |
|
158 |
/***********************************************************/
|
159 |
/* savevm/loadvm support */
|
160 |
|
161 |
#define IO_BUF_SIZE 32768 |
162 |
|
163 |
struct QEMUFile {
|
164 |
QEMUFilePutBufferFunc *put_buffer; |
165 |
QEMUFileGetBufferFunc *get_buffer; |
166 |
QEMUFileCloseFunc *close; |
167 |
QEMUFileRateLimit *rate_limit; |
168 |
QEMUFileSetRateLimit *set_rate_limit; |
169 |
QEMUFileGetRateLimit *get_rate_limit; |
170 |
void *opaque;
|
171 |
int is_write;
|
172 |
|
173 |
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
174 |
when reading */
|
175 |
int buf_index;
|
176 |
int buf_size; /* 0 when writing */ |
177 |
uint8_t buf[IO_BUF_SIZE]; |
178 |
|
179 |
int has_error;
|
180 |
}; |
181 |
|
182 |
typedef struct QEMUFileStdio |
183 |
{ |
184 |
FILE *stdio_file; |
185 |
QEMUFile *file; |
186 |
} QEMUFileStdio; |
187 |
|
188 |
typedef struct QEMUFileSocket |
189 |
{ |
190 |
int fd;
|
191 |
QEMUFile *file; |
192 |
} QEMUFileSocket; |
193 |
|
194 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
195 |
{ |
196 |
QEMUFileSocket *s = opaque; |
197 |
ssize_t len; |
198 |
|
199 |
do {
|
200 |
len = recv(s->fd, (void *)buf, size, 0); |
201 |
} while (len == -1 && socket_error() == EINTR); |
202 |
|
203 |
if (len == -1) |
204 |
len = -socket_error(); |
205 |
|
206 |
return len;
|
207 |
} |
208 |
|
209 |
static int socket_close(void *opaque) |
210 |
{ |
211 |
QEMUFileSocket *s = opaque; |
212 |
qemu_free(s); |
213 |
return 0; |
214 |
} |
215 |
|
216 |
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
217 |
{ |
218 |
QEMUFileStdio *s = opaque; |
219 |
return fwrite(buf, 1, size, s->stdio_file); |
220 |
} |
221 |
|
222 |
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
223 |
{ |
224 |
QEMUFileStdio *s = opaque; |
225 |
FILE *fp = s->stdio_file; |
226 |
int bytes;
|
227 |
|
228 |
do {
|
229 |
clearerr(fp); |
230 |
bytes = fread(buf, 1, size, fp);
|
231 |
} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
232 |
return bytes;
|
233 |
} |
234 |
|
235 |
static int stdio_pclose(void *opaque) |
236 |
{ |
237 |
QEMUFileStdio *s = opaque; |
238 |
pclose(s->stdio_file); |
239 |
qemu_free(s); |
240 |
return 0; |
241 |
} |
242 |
|
243 |
static int stdio_fclose(void *opaque) |
244 |
{ |
245 |
QEMUFileStdio *s = opaque; |
246 |
fclose(s->stdio_file); |
247 |
qemu_free(s); |
248 |
return 0; |
249 |
} |
250 |
|
251 |
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
252 |
{ |
253 |
QEMUFileStdio *s; |
254 |
|
255 |
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
256 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
257 |
return NULL; |
258 |
} |
259 |
|
260 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
261 |
|
262 |
s->stdio_file = stdio_file; |
263 |
|
264 |
if(mode[0] == 'r') { |
265 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
|
266 |
NULL, NULL, NULL); |
267 |
} else {
|
268 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
|
269 |
NULL, NULL, NULL); |
270 |
} |
271 |
return s->file;
|
272 |
} |
273 |
|
274 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
275 |
{ |
276 |
FILE *popen_file; |
277 |
|
278 |
popen_file = popen(command, mode); |
279 |
if(popen_file == NULL) { |
280 |
return NULL; |
281 |
} |
282 |
|
283 |
return qemu_popen(popen_file, mode);
|
284 |
} |
285 |
|
286 |
int qemu_stdio_fd(QEMUFile *f)
|
287 |
{ |
288 |
QEMUFileStdio *p; |
289 |
int fd;
|
290 |
|
291 |
p = (QEMUFileStdio *)f->opaque; |
292 |
fd = fileno(p->stdio_file); |
293 |
|
294 |
return fd;
|
295 |
} |
296 |
|
297 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
298 |
{ |
299 |
QEMUFileStdio *s; |
300 |
|
301 |
if (mode == NULL || |
302 |
(mode[0] != 'r' && mode[0] != 'w') || |
303 |
mode[1] != 'b' || mode[2] != 0) { |
304 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
305 |
return NULL; |
306 |
} |
307 |
|
308 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
309 |
s->stdio_file = fdopen(fd, mode); |
310 |
if (!s->stdio_file)
|
311 |
goto fail;
|
312 |
|
313 |
if(mode[0] == 'r') { |
314 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
|
315 |
NULL, NULL, NULL); |
316 |
} else {
|
317 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
|
318 |
NULL, NULL, NULL); |
319 |
} |
320 |
return s->file;
|
321 |
|
322 |
fail:
|
323 |
qemu_free(s); |
324 |
return NULL; |
325 |
} |
326 |
|
327 |
QEMUFile *qemu_fopen_socket(int fd)
|
328 |
{ |
329 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
330 |
|
331 |
s->fd = fd; |
332 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
|
333 |
NULL, NULL, NULL); |
334 |
return s->file;
|
335 |
} |
336 |
|
337 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
338 |
int64_t pos, int size)
|
339 |
{ |
340 |
QEMUFileStdio *s = opaque; |
341 |
fseek(s->stdio_file, pos, SEEK_SET); |
342 |
fwrite(buf, 1, size, s->stdio_file);
|
343 |
return size;
|
344 |
} |
345 |
|
346 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
347 |
{ |
348 |
QEMUFileStdio *s = opaque; |
349 |
fseek(s->stdio_file, pos, SEEK_SET); |
350 |
return fread(buf, 1, size, s->stdio_file); |
351 |
} |
352 |
|
353 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
354 |
{ |
355 |
QEMUFileStdio *s; |
356 |
|
357 |
if (mode == NULL || |
358 |
(mode[0] != 'r' && mode[0] != 'w') || |
359 |
mode[1] != 'b' || mode[2] != 0) { |
360 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
361 |
return NULL; |
362 |
} |
363 |
|
364 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
365 |
|
366 |
s->stdio_file = fopen(filename, mode); |
367 |
if (!s->stdio_file)
|
368 |
goto fail;
|
369 |
|
370 |
if(mode[0] == 'w') { |
371 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
|
372 |
NULL, NULL, NULL); |
373 |
} else {
|
374 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
|
375 |
NULL, NULL, NULL); |
376 |
} |
377 |
return s->file;
|
378 |
fail:
|
379 |
qemu_free(s); |
380 |
return NULL; |
381 |
} |
382 |
|
383 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
384 |
int64_t pos, int size)
|
385 |
{ |
386 |
bdrv_save_vmstate(opaque, buf, pos, size); |
387 |
return size;
|
388 |
} |
389 |
|
390 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
391 |
{ |
392 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
393 |
} |
394 |
|
395 |
static int bdrv_fclose(void *opaque) |
396 |
{ |
397 |
return 0; |
398 |
} |
399 |
|
400 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
401 |
{ |
402 |
if (is_writable)
|
403 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
404 |
NULL, NULL, NULL); |
405 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
406 |
} |
407 |
|
408 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
409 |
QEMUFileGetBufferFunc *get_buffer, |
410 |
QEMUFileCloseFunc *close, |
411 |
QEMUFileRateLimit *rate_limit, |
412 |
QEMUFileSetRateLimit *set_rate_limit, |
413 |
QEMUFileGetRateLimit *get_rate_limit) |
414 |
{ |
415 |
QEMUFile *f; |
416 |
|
417 |
f = qemu_mallocz(sizeof(QEMUFile));
|
418 |
|
419 |
f->opaque = opaque; |
420 |
f->put_buffer = put_buffer; |
421 |
f->get_buffer = get_buffer; |
422 |
f->close = close; |
423 |
f->rate_limit = rate_limit; |
424 |
f->set_rate_limit = set_rate_limit; |
425 |
f->get_rate_limit = get_rate_limit; |
426 |
f->is_write = 0;
|
427 |
|
428 |
return f;
|
429 |
} |
430 |
|
431 |
int qemu_file_has_error(QEMUFile *f)
|
432 |
{ |
433 |
return f->has_error;
|
434 |
} |
435 |
|
436 |
void qemu_file_set_error(QEMUFile *f)
|
437 |
{ |
438 |
f->has_error = 1;
|
439 |
} |
440 |
|
441 |
void qemu_fflush(QEMUFile *f)
|
442 |
{ |
443 |
if (!f->put_buffer)
|
444 |
return;
|
445 |
|
446 |
if (f->is_write && f->buf_index > 0) { |
447 |
int len;
|
448 |
|
449 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
450 |
if (len > 0) |
451 |
f->buf_offset += f->buf_index; |
452 |
else
|
453 |
f->has_error = 1;
|
454 |
f->buf_index = 0;
|
455 |
} |
456 |
} |
457 |
|
458 |
static void qemu_fill_buffer(QEMUFile *f) |
459 |
{ |
460 |
int len;
|
461 |
|
462 |
if (!f->get_buffer)
|
463 |
return;
|
464 |
|
465 |
if (f->is_write)
|
466 |
abort(); |
467 |
|
468 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
469 |
if (len > 0) { |
470 |
f->buf_index = 0;
|
471 |
f->buf_size = len; |
472 |
f->buf_offset += len; |
473 |
} else if (len != -EAGAIN) |
474 |
f->has_error = 1;
|
475 |
} |
476 |
|
477 |
int qemu_fclose(QEMUFile *f)
|
478 |
{ |
479 |
int ret = 0; |
480 |
qemu_fflush(f); |
481 |
if (f->close)
|
482 |
ret = f->close(f->opaque); |
483 |
qemu_free(f); |
484 |
return ret;
|
485 |
} |
486 |
|
487 |
void qemu_file_put_notify(QEMUFile *f)
|
488 |
{ |
489 |
f->put_buffer(f->opaque, NULL, 0, 0); |
490 |
} |
491 |
|
492 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
493 |
{ |
494 |
int l;
|
495 |
|
496 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
497 |
fprintf(stderr, |
498 |
"Attempted to write to buffer while read buffer is not empty\n");
|
499 |
abort(); |
500 |
} |
501 |
|
502 |
while (!f->has_error && size > 0) { |
503 |
l = IO_BUF_SIZE - f->buf_index; |
504 |
if (l > size)
|
505 |
l = size; |
506 |
memcpy(f->buf + f->buf_index, buf, l); |
507 |
f->is_write = 1;
|
508 |
f->buf_index += l; |
509 |
buf += l; |
510 |
size -= l; |
511 |
if (f->buf_index >= IO_BUF_SIZE)
|
512 |
qemu_fflush(f); |
513 |
} |
514 |
} |
515 |
|
516 |
void qemu_put_byte(QEMUFile *f, int v) |
517 |
{ |
518 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
519 |
fprintf(stderr, |
520 |
"Attempted to write to buffer while read buffer is not empty\n");
|
521 |
abort(); |
522 |
} |
523 |
|
524 |
f->buf[f->buf_index++] = v; |
525 |
f->is_write = 1;
|
526 |
if (f->buf_index >= IO_BUF_SIZE)
|
527 |
qemu_fflush(f); |
528 |
} |
529 |
|
530 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
531 |
{ |
532 |
int size, l;
|
533 |
|
534 |
if (f->is_write)
|
535 |
abort(); |
536 |
|
537 |
size = size1; |
538 |
while (size > 0) { |
539 |
l = f->buf_size - f->buf_index; |
540 |
if (l == 0) { |
541 |
qemu_fill_buffer(f); |
542 |
l = f->buf_size - f->buf_index; |
543 |
if (l == 0) |
544 |
break;
|
545 |
} |
546 |
if (l > size)
|
547 |
l = size; |
548 |
memcpy(buf, f->buf + f->buf_index, l); |
549 |
f->buf_index += l; |
550 |
buf += l; |
551 |
size -= l; |
552 |
} |
553 |
return size1 - size;
|
554 |
} |
555 |
|
556 |
int qemu_get_byte(QEMUFile *f)
|
557 |
{ |
558 |
if (f->is_write)
|
559 |
abort(); |
560 |
|
561 |
if (f->buf_index >= f->buf_size) {
|
562 |
qemu_fill_buffer(f); |
563 |
if (f->buf_index >= f->buf_size)
|
564 |
return 0; |
565 |
} |
566 |
return f->buf[f->buf_index++];
|
567 |
} |
568 |
|
569 |
int64_t qemu_ftell(QEMUFile *f) |
570 |
{ |
571 |
return f->buf_offset - f->buf_size + f->buf_index;
|
572 |
} |
573 |
|
574 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
575 |
{ |
576 |
if (whence == SEEK_SET) {
|
577 |
/* nothing to do */
|
578 |
} else if (whence == SEEK_CUR) { |
579 |
pos += qemu_ftell(f); |
580 |
} else {
|
581 |
/* SEEK_END not supported */
|
582 |
return -1; |
583 |
} |
584 |
if (f->put_buffer) {
|
585 |
qemu_fflush(f); |
586 |
f->buf_offset = pos; |
587 |
} else {
|
588 |
f->buf_offset = pos; |
589 |
f->buf_index = 0;
|
590 |
f->buf_size = 0;
|
591 |
} |
592 |
return pos;
|
593 |
} |
594 |
|
595 |
int qemu_file_rate_limit(QEMUFile *f)
|
596 |
{ |
597 |
if (f->rate_limit)
|
598 |
return f->rate_limit(f->opaque);
|
599 |
|
600 |
return 0; |
601 |
} |
602 |
|
603 |
size_t qemu_file_get_rate_limit(QEMUFile *f) |
604 |
{ |
605 |
if (f->get_rate_limit)
|
606 |
return f->get_rate_limit(f->opaque);
|
607 |
|
608 |
return 0; |
609 |
} |
610 |
|
611 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
612 |
{ |
613 |
/* any failed or completed migration keeps its state to allow probing of
|
614 |
* migration data, but has no associated file anymore */
|
615 |
if (f && f->set_rate_limit)
|
616 |
return f->set_rate_limit(f->opaque, new_rate);
|
617 |
|
618 |
return 0; |
619 |
} |
620 |
|
621 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
622 |
{ |
623 |
qemu_put_byte(f, v >> 8);
|
624 |
qemu_put_byte(f, v); |
625 |
} |
626 |
|
627 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
628 |
{ |
629 |
qemu_put_byte(f, v >> 24);
|
630 |
qemu_put_byte(f, v >> 16);
|
631 |
qemu_put_byte(f, v >> 8);
|
632 |
qemu_put_byte(f, v); |
633 |
} |
634 |
|
635 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
636 |
{ |
637 |
qemu_put_be32(f, v >> 32);
|
638 |
qemu_put_be32(f, v); |
639 |
} |
640 |
|
641 |
unsigned int qemu_get_be16(QEMUFile *f) |
642 |
{ |
643 |
unsigned int v; |
644 |
v = qemu_get_byte(f) << 8;
|
645 |
v |= qemu_get_byte(f); |
646 |
return v;
|
647 |
} |
648 |
|
649 |
unsigned int qemu_get_be32(QEMUFile *f) |
650 |
{ |
651 |
unsigned int v; |
652 |
v = qemu_get_byte(f) << 24;
|
653 |
v |= qemu_get_byte(f) << 16;
|
654 |
v |= qemu_get_byte(f) << 8;
|
655 |
v |= qemu_get_byte(f); |
656 |
return v;
|
657 |
} |
658 |
|
659 |
uint64_t qemu_get_be64(QEMUFile *f) |
660 |
{ |
661 |
uint64_t v; |
662 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
663 |
v |= qemu_get_be32(f); |
664 |
return v;
|
665 |
} |
666 |
|
667 |
/* 8 bit int */
|
668 |
|
669 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
670 |
{ |
671 |
int8_t *v = pv; |
672 |
qemu_get_s8s(f, v); |
673 |
return 0; |
674 |
} |
675 |
|
676 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
677 |
{ |
678 |
int8_t *v = pv; |
679 |
qemu_put_s8s(f, v); |
680 |
} |
681 |
|
682 |
const VMStateInfo vmstate_info_int8 = {
|
683 |
.name = "int8",
|
684 |
.get = get_int8, |
685 |
.put = put_int8, |
686 |
}; |
687 |
|
688 |
/* 16 bit int */
|
689 |
|
690 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
691 |
{ |
692 |
int16_t *v = pv; |
693 |
qemu_get_sbe16s(f, v); |
694 |
return 0; |
695 |
} |
696 |
|
697 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
698 |
{ |
699 |
int16_t *v = pv; |
700 |
qemu_put_sbe16s(f, v); |
701 |
} |
702 |
|
703 |
const VMStateInfo vmstate_info_int16 = {
|
704 |
.name = "int16",
|
705 |
.get = get_int16, |
706 |
.put = put_int16, |
707 |
}; |
708 |
|
709 |
/* 32 bit int */
|
710 |
|
711 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
712 |
{ |
713 |
int32_t *v = pv; |
714 |
qemu_get_sbe32s(f, v); |
715 |
return 0; |
716 |
} |
717 |
|
718 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
719 |
{ |
720 |
int32_t *v = pv; |
721 |
qemu_put_sbe32s(f, v); |
722 |
} |
723 |
|
724 |
const VMStateInfo vmstate_info_int32 = {
|
725 |
.name = "int32",
|
726 |
.get = get_int32, |
727 |
.put = put_int32, |
728 |
}; |
729 |
|
730 |
/* 32 bit int. See that the received value is the same than the one
|
731 |
in the field */
|
732 |
|
733 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
734 |
{ |
735 |
int32_t *v = pv; |
736 |
int32_t v2; |
737 |
qemu_get_sbe32s(f, &v2); |
738 |
|
739 |
if (*v == v2)
|
740 |
return 0; |
741 |
return -EINVAL;
|
742 |
} |
743 |
|
744 |
const VMStateInfo vmstate_info_int32_equal = {
|
745 |
.name = "int32 equal",
|
746 |
.get = get_int32_equal, |
747 |
.put = put_int32, |
748 |
}; |
749 |
|
750 |
/* 32 bit int. See that the received value is the less or the same
|
751 |
than the one in the field */
|
752 |
|
753 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
754 |
{ |
755 |
int32_t *old = pv; |
756 |
int32_t new; |
757 |
qemu_get_sbe32s(f, &new); |
758 |
|
759 |
if (*old <= new)
|
760 |
return 0; |
761 |
return -EINVAL;
|
762 |
} |
763 |
|
764 |
const VMStateInfo vmstate_info_int32_le = {
|
765 |
.name = "int32 equal",
|
766 |
.get = get_int32_le, |
767 |
.put = put_int32, |
768 |
}; |
769 |
|
770 |
/* 64 bit int */
|
771 |
|
772 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
773 |
{ |
774 |
int64_t *v = pv; |
775 |
qemu_get_sbe64s(f, v); |
776 |
return 0; |
777 |
} |
778 |
|
779 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
780 |
{ |
781 |
int64_t *v = pv; |
782 |
qemu_put_sbe64s(f, v); |
783 |
} |
784 |
|
785 |
const VMStateInfo vmstate_info_int64 = {
|
786 |
.name = "int64",
|
787 |
.get = get_int64, |
788 |
.put = put_int64, |
789 |
}; |
790 |
|
791 |
/* 8 bit unsigned int */
|
792 |
|
793 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
794 |
{ |
795 |
uint8_t *v = pv; |
796 |
qemu_get_8s(f, v); |
797 |
return 0; |
798 |
} |
799 |
|
800 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
801 |
{ |
802 |
uint8_t *v = pv; |
803 |
qemu_put_8s(f, v); |
804 |
} |
805 |
|
806 |
const VMStateInfo vmstate_info_uint8 = {
|
807 |
.name = "uint8",
|
808 |
.get = get_uint8, |
809 |
.put = put_uint8, |
810 |
}; |
811 |
|
812 |
/* 16 bit unsigned int */
|
813 |
|
814 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
815 |
{ |
816 |
uint16_t *v = pv; |
817 |
qemu_get_be16s(f, v); |
818 |
return 0; |
819 |
} |
820 |
|
821 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
822 |
{ |
823 |
uint16_t *v = pv; |
824 |
qemu_put_be16s(f, v); |
825 |
} |
826 |
|
827 |
const VMStateInfo vmstate_info_uint16 = {
|
828 |
.name = "uint16",
|
829 |
.get = get_uint16, |
830 |
.put = put_uint16, |
831 |
}; |
832 |
|
833 |
/* 32 bit unsigned int */
|
834 |
|
835 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
836 |
{ |
837 |
uint32_t *v = pv; |
838 |
qemu_get_be32s(f, v); |
839 |
return 0; |
840 |
} |
841 |
|
842 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
843 |
{ |
844 |
uint32_t *v = pv; |
845 |
qemu_put_be32s(f, v); |
846 |
} |
847 |
|
848 |
const VMStateInfo vmstate_info_uint32 = {
|
849 |
.name = "uint32",
|
850 |
.get = get_uint32, |
851 |
.put = put_uint32, |
852 |
}; |
853 |
|
854 |
/* 64 bit unsigned int */
|
855 |
|
856 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
857 |
{ |
858 |
uint64_t *v = pv; |
859 |
qemu_get_be64s(f, v); |
860 |
return 0; |
861 |
} |
862 |
|
863 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
864 |
{ |
865 |
uint64_t *v = pv; |
866 |
qemu_put_be64s(f, v); |
867 |
} |
868 |
|
869 |
const VMStateInfo vmstate_info_uint64 = {
|
870 |
.name = "uint64",
|
871 |
.get = get_uint64, |
872 |
.put = put_uint64, |
873 |
}; |
874 |
|
875 |
/* 8 bit int. See that the received value is the same than the one
|
876 |
in the field */
|
877 |
|
878 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
879 |
{ |
880 |
uint8_t *v = pv; |
881 |
uint8_t v2; |
882 |
qemu_get_8s(f, &v2); |
883 |
|
884 |
if (*v == v2)
|
885 |
return 0; |
886 |
return -EINVAL;
|
887 |
} |
888 |
|
889 |
const VMStateInfo vmstate_info_uint8_equal = {
|
890 |
.name = "uint8 equal",
|
891 |
.get = get_uint8_equal, |
892 |
.put = put_uint8, |
893 |
}; |
894 |
|
895 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
896 |
in the field */
|
897 |
|
898 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
899 |
{ |
900 |
uint16_t *v = pv; |
901 |
uint16_t v2; |
902 |
qemu_get_be16s(f, &v2); |
903 |
|
904 |
if (*v == v2)
|
905 |
return 0; |
906 |
return -EINVAL;
|
907 |
} |
908 |
|
909 |
const VMStateInfo vmstate_info_uint16_equal = {
|
910 |
.name = "uint16 equal",
|
911 |
.get = get_uint16_equal, |
912 |
.put = put_uint16, |
913 |
}; |
914 |
|
915 |
/* timers */
|
916 |
|
917 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
918 |
{ |
919 |
QEMUTimer *v = pv; |
920 |
qemu_get_timer(f, v); |
921 |
return 0; |
922 |
} |
923 |
|
924 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
925 |
{ |
926 |
QEMUTimer *v = pv; |
927 |
qemu_put_timer(f, v); |
928 |
} |
929 |
|
930 |
const VMStateInfo vmstate_info_timer = {
|
931 |
.name = "timer",
|
932 |
.get = get_timer, |
933 |
.put = put_timer, |
934 |
}; |
935 |
|
936 |
/* uint8_t buffers */
|
937 |
|
938 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
939 |
{ |
940 |
uint8_t *v = pv; |
941 |
qemu_get_buffer(f, v, size); |
942 |
return 0; |
943 |
} |
944 |
|
945 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
946 |
{ |
947 |
uint8_t *v = pv; |
948 |
qemu_put_buffer(f, v, size); |
949 |
} |
950 |
|
951 |
const VMStateInfo vmstate_info_buffer = {
|
952 |
.name = "buffer",
|
953 |
.get = get_buffer, |
954 |
.put = put_buffer, |
955 |
}; |
956 |
|
957 |
/* unused buffers: space that was used for some fields that are
|
958 |
not usefull anymore */
|
959 |
|
960 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
961 |
{ |
962 |
uint8_t buf[1024];
|
963 |
int block_len;
|
964 |
|
965 |
while (size > 0) { |
966 |
block_len = MIN(sizeof(buf), size);
|
967 |
size -= block_len; |
968 |
qemu_get_buffer(f, buf, block_len); |
969 |
} |
970 |
return 0; |
971 |
} |
972 |
|
973 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
974 |
{ |
975 |
static const uint8_t buf[1024]; |
976 |
int block_len;
|
977 |
|
978 |
while (size > 0) { |
979 |
block_len = MIN(sizeof(buf), size);
|
980 |
size -= block_len; |
981 |
qemu_put_buffer(f, buf, block_len); |
982 |
} |
983 |
} |
984 |
|
985 |
const VMStateInfo vmstate_info_unused_buffer = {
|
986 |
.name = "unused_buffer",
|
987 |
.get = get_unused_buffer, |
988 |
.put = put_unused_buffer, |
989 |
}; |
990 |
|
991 |
typedef struct SaveStateEntry { |
992 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
993 |
char idstr[256]; |
994 |
int instance_id;
|
995 |
int version_id;
|
996 |
int section_id;
|
997 |
SaveSetParamsHandler *set_params; |
998 |
SaveLiveStateHandler *save_live_state; |
999 |
SaveStateHandler *save_state; |
1000 |
LoadStateHandler *load_state; |
1001 |
const VMStateDescription *vmsd;
|
1002 |
void *opaque;
|
1003 |
} SaveStateEntry; |
1004 |
|
1005 |
|
1006 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
1007 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
1008 |
static int global_section_id; |
1009 |
|
1010 |
static int calculate_new_instance_id(const char *idstr) |
1011 |
{ |
1012 |
SaveStateEntry *se; |
1013 |
int instance_id = 0; |
1014 |
|
1015 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1016 |
if (strcmp(idstr, se->idstr) == 0 |
1017 |
&& instance_id <= se->instance_id) { |
1018 |
instance_id = se->instance_id + 1;
|
1019 |
} |
1020 |
} |
1021 |
return instance_id;
|
1022 |
} |
1023 |
|
1024 |
/* TODO: Individual devices generally have very little idea about the rest
|
1025 |
of the system, so instance_id should be removed/replaced.
|
1026 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
1027 |
distinguishing id for all instances of your device class. */
|
1028 |
int register_savevm_live(const char *idstr, |
1029 |
int instance_id,
|
1030 |
int version_id,
|
1031 |
SaveSetParamsHandler *set_params, |
1032 |
SaveLiveStateHandler *save_live_state, |
1033 |
SaveStateHandler *save_state, |
1034 |
LoadStateHandler *load_state, |
1035 |
void *opaque)
|
1036 |
{ |
1037 |
SaveStateEntry *se; |
1038 |
|
1039 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1040 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
1041 |
se->version_id = version_id; |
1042 |
se->section_id = global_section_id++; |
1043 |
se->set_params = set_params; |
1044 |
se->save_live_state = save_live_state; |
1045 |
se->save_state = save_state; |
1046 |
se->load_state = load_state; |
1047 |
se->opaque = opaque; |
1048 |
se->vmsd = NULL;
|
1049 |
|
1050 |
if (instance_id == -1) { |
1051 |
se->instance_id = calculate_new_instance_id(idstr); |
1052 |
} else {
|
1053 |
se->instance_id = instance_id; |
1054 |
} |
1055 |
/* add at the end of list */
|
1056 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1057 |
return 0; |
1058 |
} |
1059 |
|
1060 |
int register_savevm(const char *idstr, |
1061 |
int instance_id,
|
1062 |
int version_id,
|
1063 |
SaveStateHandler *save_state, |
1064 |
LoadStateHandler *load_state, |
1065 |
void *opaque)
|
1066 |
{ |
1067 |
return register_savevm_live(idstr, instance_id, version_id,
|
1068 |
NULL, NULL, save_state, load_state, opaque); |
1069 |
} |
1070 |
|
1071 |
void unregister_savevm(const char *idstr, void *opaque) |
1072 |
{ |
1073 |
SaveStateEntry *se, *new_se; |
1074 |
|
1075 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1076 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
1077 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1078 |
qemu_free(se); |
1079 |
} |
1080 |
} |
1081 |
} |
1082 |
|
1083 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
1084 |
void *opaque)
|
1085 |
{ |
1086 |
SaveStateEntry *se; |
1087 |
|
1088 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1089 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
1090 |
se->version_id = vmsd->version_id; |
1091 |
se->section_id = global_section_id++; |
1092 |
se->save_live_state = NULL;
|
1093 |
se->save_state = NULL;
|
1094 |
se->load_state = NULL;
|
1095 |
se->opaque = opaque; |
1096 |
se->vmsd = vmsd; |
1097 |
|
1098 |
if (instance_id == -1) { |
1099 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
1100 |
} else {
|
1101 |
se->instance_id = instance_id; |
1102 |
} |
1103 |
/* add at the end of list */
|
1104 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1105 |
return 0; |
1106 |
} |
1107 |
|
1108 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
1109 |
{ |
1110 |
SaveStateEntry *se, *new_se; |
1111 |
|
1112 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1113 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1114 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1115 |
qemu_free(se); |
1116 |
} |
1117 |
} |
1118 |
} |
1119 |
|
1120 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1121 |
void *opaque, int version_id) |
1122 |
{ |
1123 |
VMStateField *field = vmsd->fields; |
1124 |
|
1125 |
if (version_id > vmsd->version_id) {
|
1126 |
return -EINVAL;
|
1127 |
} |
1128 |
if (version_id < vmsd->minimum_version_id_old) {
|
1129 |
return -EINVAL;
|
1130 |
} |
1131 |
if (version_id < vmsd->minimum_version_id) {
|
1132 |
return vmsd->load_state_old(f, opaque, version_id);
|
1133 |
} |
1134 |
if (vmsd->pre_load) {
|
1135 |
int ret = vmsd->pre_load(opaque);
|
1136 |
if (ret)
|
1137 |
return ret;
|
1138 |
} |
1139 |
while(field->name) {
|
1140 |
if ((field->field_exists &&
|
1141 |
field->field_exists(opaque, version_id)) || |
1142 |
(!field->field_exists && |
1143 |
field->version_id <= version_id)) { |
1144 |
void *base_addr = opaque + field->offset;
|
1145 |
int ret, i, n_elems = 1; |
1146 |
int size = field->size;
|
1147 |
|
1148 |
if (field->flags & VMS_VBUFFER) {
|
1149 |
size = *(int32_t *)(opaque+field->size_offset); |
1150 |
} |
1151 |
if (field->flags & VMS_ARRAY) {
|
1152 |
n_elems = field->num; |
1153 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1154 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1155 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1156 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1157 |
} |
1158 |
if (field->flags & VMS_POINTER) {
|
1159 |
base_addr = *(void **)base_addr + field->start;
|
1160 |
} |
1161 |
for (i = 0; i < n_elems; i++) { |
1162 |
void *addr = base_addr + size * i;
|
1163 |
|
1164 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1165 |
addr = *(void **)addr;
|
1166 |
} |
1167 |
if (field->flags & VMS_STRUCT) {
|
1168 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1169 |
} else {
|
1170 |
ret = field->info->get(f, addr, size); |
1171 |
|
1172 |
} |
1173 |
if (ret < 0) { |
1174 |
return ret;
|
1175 |
} |
1176 |
} |
1177 |
} |
1178 |
field++; |
1179 |
} |
1180 |
if (vmsd->post_load) {
|
1181 |
return vmsd->post_load(opaque, version_id);
|
1182 |
} |
1183 |
return 0; |
1184 |
} |
1185 |
|
1186 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1187 |
void *opaque)
|
1188 |
{ |
1189 |
VMStateField *field = vmsd->fields; |
1190 |
|
1191 |
if (vmsd->pre_save) {
|
1192 |
vmsd->pre_save(opaque); |
1193 |
} |
1194 |
while(field->name) {
|
1195 |
if (!field->field_exists ||
|
1196 |
field->field_exists(opaque, vmsd->version_id)) { |
1197 |
void *base_addr = opaque + field->offset;
|
1198 |
int i, n_elems = 1; |
1199 |
int size = field->size;
|
1200 |
|
1201 |
if (field->flags & VMS_VBUFFER) {
|
1202 |
size = *(int32_t *)(opaque+field->size_offset); |
1203 |
} |
1204 |
if (field->flags & VMS_ARRAY) {
|
1205 |
n_elems = field->num; |
1206 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1207 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1208 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1209 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1210 |
} |
1211 |
if (field->flags & VMS_POINTER) {
|
1212 |
base_addr = *(void **)base_addr + field->start;
|
1213 |
} |
1214 |
for (i = 0; i < n_elems; i++) { |
1215 |
void *addr = base_addr + size * i;
|
1216 |
|
1217 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1218 |
addr = *(void **)addr;
|
1219 |
} |
1220 |
if (field->flags & VMS_STRUCT) {
|
1221 |
vmstate_save_state(f, field->vmsd, addr); |
1222 |
} else {
|
1223 |
field->info->put(f, addr, size); |
1224 |
} |
1225 |
} |
1226 |
} |
1227 |
field++; |
1228 |
} |
1229 |
if (vmsd->post_save) {
|
1230 |
vmsd->post_save(opaque); |
1231 |
} |
1232 |
} |
1233 |
|
1234 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1235 |
{ |
1236 |
if (!se->vmsd) { /* Old style */ |
1237 |
return se->load_state(f, se->opaque, version_id);
|
1238 |
} |
1239 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1240 |
} |
1241 |
|
1242 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1243 |
{ |
1244 |
if (!se->vmsd) { /* Old style */ |
1245 |
se->save_state(f, se->opaque); |
1246 |
return;
|
1247 |
} |
1248 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1249 |
} |
1250 |
|
1251 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1252 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1253 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1254 |
|
1255 |
#define QEMU_VM_EOF 0x00 |
1256 |
#define QEMU_VM_SECTION_START 0x01 |
1257 |
#define QEMU_VM_SECTION_PART 0x02 |
1258 |
#define QEMU_VM_SECTION_END 0x03 |
1259 |
#define QEMU_VM_SECTION_FULL 0x04 |
1260 |
|
1261 |
int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared) |
1262 |
{ |
1263 |
SaveStateEntry *se; |
1264 |
|
1265 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1266 |
if(se->set_params == NULL) { |
1267 |
continue;
|
1268 |
} |
1269 |
se->set_params(blk_enable, shared, se->opaque); |
1270 |
} |
1271 |
|
1272 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1273 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1274 |
|
1275 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1276 |
int len;
|
1277 |
|
1278 |
if (se->save_live_state == NULL) |
1279 |
continue;
|
1280 |
|
1281 |
/* Section type */
|
1282 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1283 |
qemu_put_be32(f, se->section_id); |
1284 |
|
1285 |
/* ID string */
|
1286 |
len = strlen(se->idstr); |
1287 |
qemu_put_byte(f, len); |
1288 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1289 |
|
1290 |
qemu_put_be32(f, se->instance_id); |
1291 |
qemu_put_be32(f, se->version_id); |
1292 |
|
1293 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
1294 |
} |
1295 |
|
1296 |
if (qemu_file_has_error(f))
|
1297 |
return -EIO;
|
1298 |
|
1299 |
return 0; |
1300 |
} |
1301 |
|
1302 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1303 |
{ |
1304 |
SaveStateEntry *se; |
1305 |
int ret = 1; |
1306 |
|
1307 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1308 |
if (se->save_live_state == NULL) |
1309 |
continue;
|
1310 |
|
1311 |
/* Section type */
|
1312 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1313 |
qemu_put_be32(f, se->section_id); |
1314 |
|
1315 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
1316 |
} |
1317 |
|
1318 |
if (ret)
|
1319 |
return 1; |
1320 |
|
1321 |
if (qemu_file_has_error(f))
|
1322 |
return -EIO;
|
1323 |
|
1324 |
return 0; |
1325 |
} |
1326 |
|
1327 |
int qemu_savevm_state_complete(QEMUFile *f)
|
1328 |
{ |
1329 |
SaveStateEntry *se; |
1330 |
|
1331 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1332 |
if (se->save_live_state == NULL) |
1333 |
continue;
|
1334 |
|
1335 |
/* Section type */
|
1336 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1337 |
qemu_put_be32(f, se->section_id); |
1338 |
|
1339 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
1340 |
} |
1341 |
|
1342 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1343 |
int len;
|
1344 |
|
1345 |
if (se->save_state == NULL && se->vmsd == NULL) |
1346 |
continue;
|
1347 |
|
1348 |
/* Section type */
|
1349 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1350 |
qemu_put_be32(f, se->section_id); |
1351 |
|
1352 |
/* ID string */
|
1353 |
len = strlen(se->idstr); |
1354 |
qemu_put_byte(f, len); |
1355 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1356 |
|
1357 |
qemu_put_be32(f, se->instance_id); |
1358 |
qemu_put_be32(f, se->version_id); |
1359 |
|
1360 |
vmstate_save(f, se); |
1361 |
} |
1362 |
|
1363 |
qemu_put_byte(f, QEMU_VM_EOF); |
1364 |
|
1365 |
if (qemu_file_has_error(f))
|
1366 |
return -EIO;
|
1367 |
|
1368 |
return 0; |
1369 |
} |
1370 |
|
1371 |
int qemu_savevm_state(QEMUFile *f)
|
1372 |
{ |
1373 |
int saved_vm_running;
|
1374 |
int ret;
|
1375 |
|
1376 |
saved_vm_running = vm_running; |
1377 |
vm_stop(0);
|
1378 |
|
1379 |
bdrv_flush_all(); |
1380 |
|
1381 |
ret = qemu_savevm_state_begin(f, 0, 0); |
1382 |
if (ret < 0) |
1383 |
goto out;
|
1384 |
|
1385 |
do {
|
1386 |
ret = qemu_savevm_state_iterate(f); |
1387 |
if (ret < 0) |
1388 |
goto out;
|
1389 |
} while (ret == 0); |
1390 |
|
1391 |
ret = qemu_savevm_state_complete(f); |
1392 |
|
1393 |
out:
|
1394 |
if (qemu_file_has_error(f))
|
1395 |
ret = -EIO; |
1396 |
|
1397 |
if (!ret && saved_vm_running)
|
1398 |
vm_start(); |
1399 |
|
1400 |
return ret;
|
1401 |
} |
1402 |
|
1403 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1404 |
{ |
1405 |
SaveStateEntry *se; |
1406 |
|
1407 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1408 |
if (!strcmp(se->idstr, idstr) &&
|
1409 |
instance_id == se->instance_id) |
1410 |
return se;
|
1411 |
} |
1412 |
return NULL; |
1413 |
} |
1414 |
|
1415 |
typedef struct LoadStateEntry { |
1416 |
QLIST_ENTRY(LoadStateEntry) entry; |
1417 |
SaveStateEntry *se; |
1418 |
int section_id;
|
1419 |
int version_id;
|
1420 |
} LoadStateEntry; |
1421 |
|
1422 |
int qemu_loadvm_state(QEMUFile *f)
|
1423 |
{ |
1424 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1425 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1426 |
LoadStateEntry *le, *new_le; |
1427 |
uint8_t section_type; |
1428 |
unsigned int v; |
1429 |
int ret;
|
1430 |
|
1431 |
v = qemu_get_be32(f); |
1432 |
if (v != QEMU_VM_FILE_MAGIC)
|
1433 |
return -EINVAL;
|
1434 |
|
1435 |
v = qemu_get_be32(f); |
1436 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1437 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1438 |
return -ENOTSUP;
|
1439 |
} |
1440 |
if (v != QEMU_VM_FILE_VERSION)
|
1441 |
return -ENOTSUP;
|
1442 |
|
1443 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1444 |
uint32_t instance_id, version_id, section_id; |
1445 |
SaveStateEntry *se; |
1446 |
char idstr[257]; |
1447 |
int len;
|
1448 |
|
1449 |
switch (section_type) {
|
1450 |
case QEMU_VM_SECTION_START:
|
1451 |
case QEMU_VM_SECTION_FULL:
|
1452 |
/* Read section start */
|
1453 |
section_id = qemu_get_be32(f); |
1454 |
len = qemu_get_byte(f); |
1455 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1456 |
idstr[len] = 0;
|
1457 |
instance_id = qemu_get_be32(f); |
1458 |
version_id = qemu_get_be32(f); |
1459 |
|
1460 |
/* Find savevm section */
|
1461 |
se = find_se(idstr, instance_id); |
1462 |
if (se == NULL) { |
1463 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1464 |
ret = -EINVAL; |
1465 |
goto out;
|
1466 |
} |
1467 |
|
1468 |
/* Validate version */
|
1469 |
if (version_id > se->version_id) {
|
1470 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1471 |
version_id, idstr, se->version_id); |
1472 |
ret = -EINVAL; |
1473 |
goto out;
|
1474 |
} |
1475 |
|
1476 |
/* Add entry */
|
1477 |
le = qemu_mallocz(sizeof(*le));
|
1478 |
|
1479 |
le->se = se; |
1480 |
le->section_id = section_id; |
1481 |
le->version_id = version_id; |
1482 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1483 |
|
1484 |
ret = vmstate_load(f, le->se, le->version_id); |
1485 |
if (ret < 0) { |
1486 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1487 |
instance_id, idstr); |
1488 |
goto out;
|
1489 |
} |
1490 |
break;
|
1491 |
case QEMU_VM_SECTION_PART:
|
1492 |
case QEMU_VM_SECTION_END:
|
1493 |
section_id = qemu_get_be32(f); |
1494 |
|
1495 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1496 |
if (le->section_id == section_id) {
|
1497 |
break;
|
1498 |
} |
1499 |
} |
1500 |
if (le == NULL) { |
1501 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1502 |
ret = -EINVAL; |
1503 |
goto out;
|
1504 |
} |
1505 |
|
1506 |
ret = vmstate_load(f, le->se, le->version_id); |
1507 |
if (ret < 0) { |
1508 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1509 |
section_id); |
1510 |
goto out;
|
1511 |
} |
1512 |
break;
|
1513 |
default:
|
1514 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1515 |
ret = -EINVAL; |
1516 |
goto out;
|
1517 |
} |
1518 |
} |
1519 |
|
1520 |
ret = 0;
|
1521 |
|
1522 |
out:
|
1523 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1524 |
QLIST_REMOVE(le, entry); |
1525 |
qemu_free(le); |
1526 |
} |
1527 |
|
1528 |
if (qemu_file_has_error(f))
|
1529 |
ret = -EIO; |
1530 |
|
1531 |
return ret;
|
1532 |
} |
1533 |
|
1534 |
/* device can contain snapshots */
|
1535 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1536 |
{ |
1537 |
return (bs &&
|
1538 |
!bdrv_is_removable(bs) && |
1539 |
!bdrv_is_read_only(bs)); |
1540 |
} |
1541 |
|
1542 |
/* device must be snapshots in order to have a reliable snapshot */
|
1543 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1544 |
{ |
1545 |
return (bs &&
|
1546 |
!bdrv_is_removable(bs) && |
1547 |
!bdrv_is_read_only(bs)); |
1548 |
} |
1549 |
|
1550 |
static BlockDriverState *get_bs_snapshots(void) |
1551 |
{ |
1552 |
BlockDriverState *bs; |
1553 |
DriveInfo *dinfo; |
1554 |
|
1555 |
if (bs_snapshots)
|
1556 |
return bs_snapshots;
|
1557 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1558 |
bs = dinfo->bdrv; |
1559 |
if (bdrv_can_snapshot(bs))
|
1560 |
goto ok;
|
1561 |
} |
1562 |
return NULL; |
1563 |
ok:
|
1564 |
bs_snapshots = bs; |
1565 |
return bs;
|
1566 |
} |
1567 |
|
1568 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1569 |
const char *name) |
1570 |
{ |
1571 |
QEMUSnapshotInfo *sn_tab, *sn; |
1572 |
int nb_sns, i, ret;
|
1573 |
|
1574 |
ret = -ENOENT; |
1575 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1576 |
if (nb_sns < 0) |
1577 |
return ret;
|
1578 |
for(i = 0; i < nb_sns; i++) { |
1579 |
sn = &sn_tab[i]; |
1580 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1581 |
*sn_info = *sn; |
1582 |
ret = 0;
|
1583 |
break;
|
1584 |
} |
1585 |
} |
1586 |
qemu_free(sn_tab); |
1587 |
return ret;
|
1588 |
} |
1589 |
|
1590 |
/*
|
1591 |
* Deletes snapshots of a given name in all opened images.
|
1592 |
*/
|
1593 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
1594 |
{ |
1595 |
BlockDriverState *bs; |
1596 |
DriveInfo *dinfo; |
1597 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
1598 |
int ret;
|
1599 |
|
1600 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1601 |
bs = dinfo->bdrv; |
1602 |
if (bdrv_can_snapshot(bs) &&
|
1603 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
1604 |
{ |
1605 |
ret = bdrv_snapshot_delete(bs, name); |
1606 |
if (ret < 0) { |
1607 |
monitor_printf(mon, |
1608 |
"Error while deleting snapshot on '%s'\n",
|
1609 |
bdrv_get_device_name(bs)); |
1610 |
return -1; |
1611 |
} |
1612 |
} |
1613 |
} |
1614 |
|
1615 |
return 0; |
1616 |
} |
1617 |
|
1618 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1619 |
{ |
1620 |
DriveInfo *dinfo; |
1621 |
BlockDriverState *bs, *bs1; |
1622 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1623 |
int ret;
|
1624 |
QEMUFile *f; |
1625 |
int saved_vm_running;
|
1626 |
uint32_t vm_state_size; |
1627 |
#ifdef _WIN32
|
1628 |
struct _timeb tb;
|
1629 |
#else
|
1630 |
struct timeval tv;
|
1631 |
#endif
|
1632 |
const char *name = qdict_get_try_str(qdict, "name"); |
1633 |
|
1634 |
bs = get_bs_snapshots(); |
1635 |
if (!bs) {
|
1636 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1637 |
return;
|
1638 |
} |
1639 |
|
1640 |
/* ??? Should this occur after vm_stop? */
|
1641 |
qemu_aio_flush(); |
1642 |
|
1643 |
saved_vm_running = vm_running; |
1644 |
vm_stop(0);
|
1645 |
|
1646 |
memset(sn, 0, sizeof(*sn)); |
1647 |
if (name) {
|
1648 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1649 |
if (ret >= 0) { |
1650 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1651 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1652 |
} else {
|
1653 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1654 |
} |
1655 |
} |
1656 |
|
1657 |
/* fill auxiliary fields */
|
1658 |
#ifdef _WIN32
|
1659 |
_ftime(&tb); |
1660 |
sn->date_sec = tb.time; |
1661 |
sn->date_nsec = tb.millitm * 1000000;
|
1662 |
#else
|
1663 |
gettimeofday(&tv, NULL);
|
1664 |
sn->date_sec = tv.tv_sec; |
1665 |
sn->date_nsec = tv.tv_usec * 1000;
|
1666 |
#endif
|
1667 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1668 |
|
1669 |
/* Delete old snapshots of the same name */
|
1670 |
if (del_existing_snapshots(mon, name) < 0) { |
1671 |
goto the_end;
|
1672 |
} |
1673 |
|
1674 |
/* save the VM state */
|
1675 |
f = qemu_fopen_bdrv(bs, 1);
|
1676 |
if (!f) {
|
1677 |
monitor_printf(mon, "Could not open VM state file\n");
|
1678 |
goto the_end;
|
1679 |
} |
1680 |
ret = qemu_savevm_state(f); |
1681 |
vm_state_size = qemu_ftell(f); |
1682 |
qemu_fclose(f); |
1683 |
if (ret < 0) { |
1684 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1685 |
goto the_end;
|
1686 |
} |
1687 |
|
1688 |
/* create the snapshots */
|
1689 |
|
1690 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1691 |
bs1 = dinfo->bdrv; |
1692 |
if (bdrv_has_snapshot(bs1)) {
|
1693 |
/* Write VM state size only to the image that contains the state */
|
1694 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1695 |
ret = bdrv_snapshot_create(bs1, sn); |
1696 |
if (ret < 0) { |
1697 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1698 |
bdrv_get_device_name(bs1)); |
1699 |
} |
1700 |
} |
1701 |
} |
1702 |
|
1703 |
the_end:
|
1704 |
if (saved_vm_running)
|
1705 |
vm_start(); |
1706 |
} |
1707 |
|
1708 |
int load_vmstate(Monitor *mon, const char *name) |
1709 |
{ |
1710 |
DriveInfo *dinfo; |
1711 |
BlockDriverState *bs, *bs1; |
1712 |
QEMUSnapshotInfo sn; |
1713 |
QEMUFile *f; |
1714 |
int ret;
|
1715 |
|
1716 |
bs = get_bs_snapshots(); |
1717 |
if (!bs) {
|
1718 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1719 |
return -EINVAL;
|
1720 |
} |
1721 |
|
1722 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1723 |
qemu_aio_flush(); |
1724 |
|
1725 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1726 |
bs1 = dinfo->bdrv; |
1727 |
if (bdrv_has_snapshot(bs1)) {
|
1728 |
ret = bdrv_snapshot_goto(bs1, name); |
1729 |
if (ret < 0) { |
1730 |
if (bs != bs1)
|
1731 |
monitor_printf(mon, "Warning: ");
|
1732 |
switch(ret) {
|
1733 |
case -ENOTSUP:
|
1734 |
monitor_printf(mon, |
1735 |
"Snapshots not supported on device '%s'\n",
|
1736 |
bdrv_get_device_name(bs1)); |
1737 |
break;
|
1738 |
case -ENOENT:
|
1739 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1740 |
"device '%s'\n",
|
1741 |
name, bdrv_get_device_name(bs1)); |
1742 |
break;
|
1743 |
default:
|
1744 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1745 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1746 |
break;
|
1747 |
} |
1748 |
/* fatal on snapshot block device */
|
1749 |
if (bs == bs1)
|
1750 |
return 0; |
1751 |
} |
1752 |
} |
1753 |
} |
1754 |
|
1755 |
/* Don't even try to load empty VM states */
|
1756 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1757 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1758 |
return -EINVAL;
|
1759 |
|
1760 |
/* restore the VM state */
|
1761 |
f = qemu_fopen_bdrv(bs, 0);
|
1762 |
if (!f) {
|
1763 |
monitor_printf(mon, "Could not open VM state file\n");
|
1764 |
return -EINVAL;
|
1765 |
} |
1766 |
ret = qemu_loadvm_state(f); |
1767 |
qemu_fclose(f); |
1768 |
if (ret < 0) { |
1769 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1770 |
return ret;
|
1771 |
} |
1772 |
return 0; |
1773 |
} |
1774 |
|
1775 |
void do_delvm(Monitor *mon, const QDict *qdict) |
1776 |
{ |
1777 |
DriveInfo *dinfo; |
1778 |
BlockDriverState *bs, *bs1; |
1779 |
int ret;
|
1780 |
const char *name = qdict_get_str(qdict, "name"); |
1781 |
|
1782 |
bs = get_bs_snapshots(); |
1783 |
if (!bs) {
|
1784 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1785 |
return;
|
1786 |
} |
1787 |
|
1788 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1789 |
bs1 = dinfo->bdrv; |
1790 |
if (bdrv_has_snapshot(bs1)) {
|
1791 |
ret = bdrv_snapshot_delete(bs1, name); |
1792 |
if (ret < 0) { |
1793 |
if (ret == -ENOTSUP)
|
1794 |
monitor_printf(mon, |
1795 |
"Snapshots not supported on device '%s'\n",
|
1796 |
bdrv_get_device_name(bs1)); |
1797 |
else
|
1798 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1799 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1800 |
} |
1801 |
} |
1802 |
} |
1803 |
} |
1804 |
|
1805 |
void do_info_snapshots(Monitor *mon)
|
1806 |
{ |
1807 |
DriveInfo *dinfo; |
1808 |
BlockDriverState *bs, *bs1; |
1809 |
QEMUSnapshotInfo *sn_tab, *sn; |
1810 |
int nb_sns, i;
|
1811 |
char buf[256]; |
1812 |
|
1813 |
bs = get_bs_snapshots(); |
1814 |
if (!bs) {
|
1815 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1816 |
return;
|
1817 |
} |
1818 |
monitor_printf(mon, "Snapshot devices:");
|
1819 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1820 |
bs1 = dinfo->bdrv; |
1821 |
if (bdrv_has_snapshot(bs1)) {
|
1822 |
if (bs == bs1)
|
1823 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1824 |
} |
1825 |
} |
1826 |
monitor_printf(mon, "\n");
|
1827 |
|
1828 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1829 |
if (nb_sns < 0) { |
1830 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1831 |
return;
|
1832 |
} |
1833 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1834 |
bdrv_get_device_name(bs)); |
1835 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1836 |
for(i = 0; i < nb_sns; i++) { |
1837 |
sn = &sn_tab[i]; |
1838 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1839 |
} |
1840 |
qemu_free(sn_tab); |
1841 |
} |