root / savevm.c @ 03cd4655
History | View | Annotate | Download (45.7 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 |
return fwrite(buf, 1, size, s->stdio_file); |
343 |
} |
344 |
|
345 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
346 |
{ |
347 |
QEMUFileStdio *s = opaque; |
348 |
fseek(s->stdio_file, pos, SEEK_SET); |
349 |
return fread(buf, 1, size, s->stdio_file); |
350 |
} |
351 |
|
352 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
353 |
{ |
354 |
QEMUFileStdio *s; |
355 |
|
356 |
if (mode == NULL || |
357 |
(mode[0] != 'r' && mode[0] != 'w') || |
358 |
mode[1] != 'b' || mode[2] != 0) { |
359 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
360 |
return NULL; |
361 |
} |
362 |
|
363 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
364 |
|
365 |
s->stdio_file = fopen(filename, mode); |
366 |
if (!s->stdio_file)
|
367 |
goto fail;
|
368 |
|
369 |
if(mode[0] == 'w') { |
370 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
|
371 |
NULL, NULL, NULL); |
372 |
} else {
|
373 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
|
374 |
NULL, NULL, NULL); |
375 |
} |
376 |
return s->file;
|
377 |
fail:
|
378 |
qemu_free(s); |
379 |
return NULL; |
380 |
} |
381 |
|
382 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
383 |
int64_t pos, int size)
|
384 |
{ |
385 |
bdrv_save_vmstate(opaque, buf, pos, size); |
386 |
return size;
|
387 |
} |
388 |
|
389 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
390 |
{ |
391 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
392 |
} |
393 |
|
394 |
static int bdrv_fclose(void *opaque) |
395 |
{ |
396 |
return 0; |
397 |
} |
398 |
|
399 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
400 |
{ |
401 |
if (is_writable)
|
402 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
403 |
NULL, NULL, NULL); |
404 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
405 |
} |
406 |
|
407 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
408 |
QEMUFileGetBufferFunc *get_buffer, |
409 |
QEMUFileCloseFunc *close, |
410 |
QEMUFileRateLimit *rate_limit, |
411 |
QEMUFileSetRateLimit *set_rate_limit, |
412 |
QEMUFileGetRateLimit *get_rate_limit) |
413 |
{ |
414 |
QEMUFile *f; |
415 |
|
416 |
f = qemu_mallocz(sizeof(QEMUFile));
|
417 |
|
418 |
f->opaque = opaque; |
419 |
f->put_buffer = put_buffer; |
420 |
f->get_buffer = get_buffer; |
421 |
f->close = close; |
422 |
f->rate_limit = rate_limit; |
423 |
f->set_rate_limit = set_rate_limit; |
424 |
f->get_rate_limit = get_rate_limit; |
425 |
f->is_write = 0;
|
426 |
|
427 |
return f;
|
428 |
} |
429 |
|
430 |
int qemu_file_has_error(QEMUFile *f)
|
431 |
{ |
432 |
return f->has_error;
|
433 |
} |
434 |
|
435 |
void qemu_file_set_error(QEMUFile *f)
|
436 |
{ |
437 |
f->has_error = 1;
|
438 |
} |
439 |
|
440 |
void qemu_fflush(QEMUFile *f)
|
441 |
{ |
442 |
if (!f->put_buffer)
|
443 |
return;
|
444 |
|
445 |
if (f->is_write && f->buf_index > 0) { |
446 |
int len;
|
447 |
|
448 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
449 |
if (len > 0) |
450 |
f->buf_offset += f->buf_index; |
451 |
else
|
452 |
f->has_error = 1;
|
453 |
f->buf_index = 0;
|
454 |
} |
455 |
} |
456 |
|
457 |
static void qemu_fill_buffer(QEMUFile *f) |
458 |
{ |
459 |
int len;
|
460 |
|
461 |
if (!f->get_buffer)
|
462 |
return;
|
463 |
|
464 |
if (f->is_write)
|
465 |
abort(); |
466 |
|
467 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
468 |
if (len > 0) { |
469 |
f->buf_index = 0;
|
470 |
f->buf_size = len; |
471 |
f->buf_offset += len; |
472 |
} else if (len != -EAGAIN) |
473 |
f->has_error = 1;
|
474 |
} |
475 |
|
476 |
int qemu_fclose(QEMUFile *f)
|
477 |
{ |
478 |
int ret = 0; |
479 |
qemu_fflush(f); |
480 |
if (f->close)
|
481 |
ret = f->close(f->opaque); |
482 |
qemu_free(f); |
483 |
return ret;
|
484 |
} |
485 |
|
486 |
void qemu_file_put_notify(QEMUFile *f)
|
487 |
{ |
488 |
f->put_buffer(f->opaque, NULL, 0, 0); |
489 |
} |
490 |
|
491 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
492 |
{ |
493 |
int l;
|
494 |
|
495 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
496 |
fprintf(stderr, |
497 |
"Attempted to write to buffer while read buffer is not empty\n");
|
498 |
abort(); |
499 |
} |
500 |
|
501 |
while (!f->has_error && size > 0) { |
502 |
l = IO_BUF_SIZE - f->buf_index; |
503 |
if (l > size)
|
504 |
l = size; |
505 |
memcpy(f->buf + f->buf_index, buf, l); |
506 |
f->is_write = 1;
|
507 |
f->buf_index += l; |
508 |
buf += l; |
509 |
size -= l; |
510 |
if (f->buf_index >= IO_BUF_SIZE)
|
511 |
qemu_fflush(f); |
512 |
} |
513 |
} |
514 |
|
515 |
void qemu_put_byte(QEMUFile *f, int v) |
516 |
{ |
517 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
518 |
fprintf(stderr, |
519 |
"Attempted to write to buffer while read buffer is not empty\n");
|
520 |
abort(); |
521 |
} |
522 |
|
523 |
f->buf[f->buf_index++] = v; |
524 |
f->is_write = 1;
|
525 |
if (f->buf_index >= IO_BUF_SIZE)
|
526 |
qemu_fflush(f); |
527 |
} |
528 |
|
529 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
530 |
{ |
531 |
int size, l;
|
532 |
|
533 |
if (f->is_write)
|
534 |
abort(); |
535 |
|
536 |
size = size1; |
537 |
while (size > 0) { |
538 |
l = f->buf_size - f->buf_index; |
539 |
if (l == 0) { |
540 |
qemu_fill_buffer(f); |
541 |
l = f->buf_size - f->buf_index; |
542 |
if (l == 0) |
543 |
break;
|
544 |
} |
545 |
if (l > size)
|
546 |
l = size; |
547 |
memcpy(buf, f->buf + f->buf_index, l); |
548 |
f->buf_index += l; |
549 |
buf += l; |
550 |
size -= l; |
551 |
} |
552 |
return size1 - size;
|
553 |
} |
554 |
|
555 |
int qemu_get_byte(QEMUFile *f)
|
556 |
{ |
557 |
if (f->is_write)
|
558 |
abort(); |
559 |
|
560 |
if (f->buf_index >= f->buf_size) {
|
561 |
qemu_fill_buffer(f); |
562 |
if (f->buf_index >= f->buf_size)
|
563 |
return 0; |
564 |
} |
565 |
return f->buf[f->buf_index++];
|
566 |
} |
567 |
|
568 |
int64_t qemu_ftell(QEMUFile *f) |
569 |
{ |
570 |
return f->buf_offset - f->buf_size + f->buf_index;
|
571 |
} |
572 |
|
573 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
574 |
{ |
575 |
if (whence == SEEK_SET) {
|
576 |
/* nothing to do */
|
577 |
} else if (whence == SEEK_CUR) { |
578 |
pos += qemu_ftell(f); |
579 |
} else {
|
580 |
/* SEEK_END not supported */
|
581 |
return -1; |
582 |
} |
583 |
if (f->put_buffer) {
|
584 |
qemu_fflush(f); |
585 |
f->buf_offset = pos; |
586 |
} else {
|
587 |
f->buf_offset = pos; |
588 |
f->buf_index = 0;
|
589 |
f->buf_size = 0;
|
590 |
} |
591 |
return pos;
|
592 |
} |
593 |
|
594 |
int qemu_file_rate_limit(QEMUFile *f)
|
595 |
{ |
596 |
if (f->rate_limit)
|
597 |
return f->rate_limit(f->opaque);
|
598 |
|
599 |
return 0; |
600 |
} |
601 |
|
602 |
size_t qemu_file_get_rate_limit(QEMUFile *f) |
603 |
{ |
604 |
if (f->get_rate_limit)
|
605 |
return f->get_rate_limit(f->opaque);
|
606 |
|
607 |
return 0; |
608 |
} |
609 |
|
610 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
611 |
{ |
612 |
/* any failed or completed migration keeps its state to allow probing of
|
613 |
* migration data, but has no associated file anymore */
|
614 |
if (f && f->set_rate_limit)
|
615 |
return f->set_rate_limit(f->opaque, new_rate);
|
616 |
|
617 |
return 0; |
618 |
} |
619 |
|
620 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
621 |
{ |
622 |
qemu_put_byte(f, v >> 8);
|
623 |
qemu_put_byte(f, v); |
624 |
} |
625 |
|
626 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
627 |
{ |
628 |
qemu_put_byte(f, v >> 24);
|
629 |
qemu_put_byte(f, v >> 16);
|
630 |
qemu_put_byte(f, v >> 8);
|
631 |
qemu_put_byte(f, v); |
632 |
} |
633 |
|
634 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
635 |
{ |
636 |
qemu_put_be32(f, v >> 32);
|
637 |
qemu_put_be32(f, v); |
638 |
} |
639 |
|
640 |
unsigned int qemu_get_be16(QEMUFile *f) |
641 |
{ |
642 |
unsigned int v; |
643 |
v = qemu_get_byte(f) << 8;
|
644 |
v |= qemu_get_byte(f); |
645 |
return v;
|
646 |
} |
647 |
|
648 |
unsigned int qemu_get_be32(QEMUFile *f) |
649 |
{ |
650 |
unsigned int v; |
651 |
v = qemu_get_byte(f) << 24;
|
652 |
v |= qemu_get_byte(f) << 16;
|
653 |
v |= qemu_get_byte(f) << 8;
|
654 |
v |= qemu_get_byte(f); |
655 |
return v;
|
656 |
} |
657 |
|
658 |
uint64_t qemu_get_be64(QEMUFile *f) |
659 |
{ |
660 |
uint64_t v; |
661 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
662 |
v |= qemu_get_be32(f); |
663 |
return v;
|
664 |
} |
665 |
|
666 |
/* 8 bit int */
|
667 |
|
668 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
669 |
{ |
670 |
int8_t *v = pv; |
671 |
qemu_get_s8s(f, v); |
672 |
return 0; |
673 |
} |
674 |
|
675 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
676 |
{ |
677 |
int8_t *v = pv; |
678 |
qemu_put_s8s(f, v); |
679 |
} |
680 |
|
681 |
const VMStateInfo vmstate_info_int8 = {
|
682 |
.name = "int8",
|
683 |
.get = get_int8, |
684 |
.put = put_int8, |
685 |
}; |
686 |
|
687 |
/* 16 bit int */
|
688 |
|
689 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
690 |
{ |
691 |
int16_t *v = pv; |
692 |
qemu_get_sbe16s(f, v); |
693 |
return 0; |
694 |
} |
695 |
|
696 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
697 |
{ |
698 |
int16_t *v = pv; |
699 |
qemu_put_sbe16s(f, v); |
700 |
} |
701 |
|
702 |
const VMStateInfo vmstate_info_int16 = {
|
703 |
.name = "int16",
|
704 |
.get = get_int16, |
705 |
.put = put_int16, |
706 |
}; |
707 |
|
708 |
/* 32 bit int */
|
709 |
|
710 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
711 |
{ |
712 |
int32_t *v = pv; |
713 |
qemu_get_sbe32s(f, v); |
714 |
return 0; |
715 |
} |
716 |
|
717 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
718 |
{ |
719 |
int32_t *v = pv; |
720 |
qemu_put_sbe32s(f, v); |
721 |
} |
722 |
|
723 |
const VMStateInfo vmstate_info_int32 = {
|
724 |
.name = "int32",
|
725 |
.get = get_int32, |
726 |
.put = put_int32, |
727 |
}; |
728 |
|
729 |
/* 32 bit int. See that the received value is the same than the one
|
730 |
in the field */
|
731 |
|
732 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
733 |
{ |
734 |
int32_t *v = pv; |
735 |
int32_t v2; |
736 |
qemu_get_sbe32s(f, &v2); |
737 |
|
738 |
if (*v == v2)
|
739 |
return 0; |
740 |
return -EINVAL;
|
741 |
} |
742 |
|
743 |
const VMStateInfo vmstate_info_int32_equal = {
|
744 |
.name = "int32 equal",
|
745 |
.get = get_int32_equal, |
746 |
.put = put_int32, |
747 |
}; |
748 |
|
749 |
/* 32 bit int. See that the received value is the less or the same
|
750 |
than the one in the field */
|
751 |
|
752 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
753 |
{ |
754 |
int32_t *old = pv; |
755 |
int32_t new; |
756 |
qemu_get_sbe32s(f, &new); |
757 |
|
758 |
if (*old <= new)
|
759 |
return 0; |
760 |
return -EINVAL;
|
761 |
} |
762 |
|
763 |
const VMStateInfo vmstate_info_int32_le = {
|
764 |
.name = "int32 equal",
|
765 |
.get = get_int32_le, |
766 |
.put = put_int32, |
767 |
}; |
768 |
|
769 |
/* 64 bit int */
|
770 |
|
771 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
772 |
{ |
773 |
int64_t *v = pv; |
774 |
qemu_get_sbe64s(f, v); |
775 |
return 0; |
776 |
} |
777 |
|
778 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
779 |
{ |
780 |
int64_t *v = pv; |
781 |
qemu_put_sbe64s(f, v); |
782 |
} |
783 |
|
784 |
const VMStateInfo vmstate_info_int64 = {
|
785 |
.name = "int64",
|
786 |
.get = get_int64, |
787 |
.put = put_int64, |
788 |
}; |
789 |
|
790 |
/* 8 bit unsigned int */
|
791 |
|
792 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
793 |
{ |
794 |
uint8_t *v = pv; |
795 |
qemu_get_8s(f, v); |
796 |
return 0; |
797 |
} |
798 |
|
799 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
800 |
{ |
801 |
uint8_t *v = pv; |
802 |
qemu_put_8s(f, v); |
803 |
} |
804 |
|
805 |
const VMStateInfo vmstate_info_uint8 = {
|
806 |
.name = "uint8",
|
807 |
.get = get_uint8, |
808 |
.put = put_uint8, |
809 |
}; |
810 |
|
811 |
/* 16 bit unsigned int */
|
812 |
|
813 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
814 |
{ |
815 |
uint16_t *v = pv; |
816 |
qemu_get_be16s(f, v); |
817 |
return 0; |
818 |
} |
819 |
|
820 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
821 |
{ |
822 |
uint16_t *v = pv; |
823 |
qemu_put_be16s(f, v); |
824 |
} |
825 |
|
826 |
const VMStateInfo vmstate_info_uint16 = {
|
827 |
.name = "uint16",
|
828 |
.get = get_uint16, |
829 |
.put = put_uint16, |
830 |
}; |
831 |
|
832 |
/* 32 bit unsigned int */
|
833 |
|
834 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
835 |
{ |
836 |
uint32_t *v = pv; |
837 |
qemu_get_be32s(f, v); |
838 |
return 0; |
839 |
} |
840 |
|
841 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
842 |
{ |
843 |
uint32_t *v = pv; |
844 |
qemu_put_be32s(f, v); |
845 |
} |
846 |
|
847 |
const VMStateInfo vmstate_info_uint32 = {
|
848 |
.name = "uint32",
|
849 |
.get = get_uint32, |
850 |
.put = put_uint32, |
851 |
}; |
852 |
|
853 |
/* 64 bit unsigned int */
|
854 |
|
855 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
856 |
{ |
857 |
uint64_t *v = pv; |
858 |
qemu_get_be64s(f, v); |
859 |
return 0; |
860 |
} |
861 |
|
862 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
863 |
{ |
864 |
uint64_t *v = pv; |
865 |
qemu_put_be64s(f, v); |
866 |
} |
867 |
|
868 |
const VMStateInfo vmstate_info_uint64 = {
|
869 |
.name = "uint64",
|
870 |
.get = get_uint64, |
871 |
.put = put_uint64, |
872 |
}; |
873 |
|
874 |
/* 8 bit int. See that the received value is the same than the one
|
875 |
in the field */
|
876 |
|
877 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
878 |
{ |
879 |
uint8_t *v = pv; |
880 |
uint8_t v2; |
881 |
qemu_get_8s(f, &v2); |
882 |
|
883 |
if (*v == v2)
|
884 |
return 0; |
885 |
return -EINVAL;
|
886 |
} |
887 |
|
888 |
const VMStateInfo vmstate_info_uint8_equal = {
|
889 |
.name = "uint8 equal",
|
890 |
.get = get_uint8_equal, |
891 |
.put = put_uint8, |
892 |
}; |
893 |
|
894 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
895 |
in the field */
|
896 |
|
897 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
898 |
{ |
899 |
uint16_t *v = pv; |
900 |
uint16_t v2; |
901 |
qemu_get_be16s(f, &v2); |
902 |
|
903 |
if (*v == v2)
|
904 |
return 0; |
905 |
return -EINVAL;
|
906 |
} |
907 |
|
908 |
const VMStateInfo vmstate_info_uint16_equal = {
|
909 |
.name = "uint16 equal",
|
910 |
.get = get_uint16_equal, |
911 |
.put = put_uint16, |
912 |
}; |
913 |
|
914 |
/* timers */
|
915 |
|
916 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
917 |
{ |
918 |
QEMUTimer *v = pv; |
919 |
qemu_get_timer(f, v); |
920 |
return 0; |
921 |
} |
922 |
|
923 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
924 |
{ |
925 |
QEMUTimer *v = pv; |
926 |
qemu_put_timer(f, v); |
927 |
} |
928 |
|
929 |
const VMStateInfo vmstate_info_timer = {
|
930 |
.name = "timer",
|
931 |
.get = get_timer, |
932 |
.put = put_timer, |
933 |
}; |
934 |
|
935 |
/* uint8_t buffers */
|
936 |
|
937 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
938 |
{ |
939 |
uint8_t *v = pv; |
940 |
qemu_get_buffer(f, v, size); |
941 |
return 0; |
942 |
} |
943 |
|
944 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
945 |
{ |
946 |
uint8_t *v = pv; |
947 |
qemu_put_buffer(f, v, size); |
948 |
} |
949 |
|
950 |
const VMStateInfo vmstate_info_buffer = {
|
951 |
.name = "buffer",
|
952 |
.get = get_buffer, |
953 |
.put = put_buffer, |
954 |
}; |
955 |
|
956 |
/* unused buffers: space that was used for some fields that are
|
957 |
not usefull anymore */
|
958 |
|
959 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
960 |
{ |
961 |
uint8_t buf[1024];
|
962 |
int block_len;
|
963 |
|
964 |
while (size > 0) { |
965 |
block_len = MIN(sizeof(buf), size);
|
966 |
size -= block_len; |
967 |
qemu_get_buffer(f, buf, block_len); |
968 |
} |
969 |
return 0; |
970 |
} |
971 |
|
972 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
973 |
{ |
974 |
static const uint8_t buf[1024]; |
975 |
int block_len;
|
976 |
|
977 |
while (size > 0) { |
978 |
block_len = MIN(sizeof(buf), size);
|
979 |
size -= block_len; |
980 |
qemu_put_buffer(f, buf, block_len); |
981 |
} |
982 |
} |
983 |
|
984 |
const VMStateInfo vmstate_info_unused_buffer = {
|
985 |
.name = "unused_buffer",
|
986 |
.get = get_unused_buffer, |
987 |
.put = put_unused_buffer, |
988 |
}; |
989 |
|
990 |
typedef struct SaveStateEntry { |
991 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
992 |
char idstr[256]; |
993 |
int instance_id;
|
994 |
int version_id;
|
995 |
int section_id;
|
996 |
SaveSetParamsHandler *set_params; |
997 |
SaveLiveStateHandler *save_live_state; |
998 |
SaveStateHandler *save_state; |
999 |
LoadStateHandler *load_state; |
1000 |
const VMStateDescription *vmsd;
|
1001 |
void *opaque;
|
1002 |
} SaveStateEntry; |
1003 |
|
1004 |
|
1005 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
1006 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
1007 |
static int global_section_id; |
1008 |
|
1009 |
static int calculate_new_instance_id(const char *idstr) |
1010 |
{ |
1011 |
SaveStateEntry *se; |
1012 |
int instance_id = 0; |
1013 |
|
1014 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1015 |
if (strcmp(idstr, se->idstr) == 0 |
1016 |
&& instance_id <= se->instance_id) { |
1017 |
instance_id = se->instance_id + 1;
|
1018 |
} |
1019 |
} |
1020 |
return instance_id;
|
1021 |
} |
1022 |
|
1023 |
/* TODO: Individual devices generally have very little idea about the rest
|
1024 |
of the system, so instance_id should be removed/replaced.
|
1025 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
1026 |
distinguishing id for all instances of your device class. */
|
1027 |
int register_savevm_live(const char *idstr, |
1028 |
int instance_id,
|
1029 |
int version_id,
|
1030 |
SaveSetParamsHandler *set_params, |
1031 |
SaveLiveStateHandler *save_live_state, |
1032 |
SaveStateHandler *save_state, |
1033 |
LoadStateHandler *load_state, |
1034 |
void *opaque)
|
1035 |
{ |
1036 |
SaveStateEntry *se; |
1037 |
|
1038 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1039 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
1040 |
se->version_id = version_id; |
1041 |
se->section_id = global_section_id++; |
1042 |
se->set_params = set_params; |
1043 |
se->save_live_state = save_live_state; |
1044 |
se->save_state = save_state; |
1045 |
se->load_state = load_state; |
1046 |
se->opaque = opaque; |
1047 |
se->vmsd = NULL;
|
1048 |
|
1049 |
if (instance_id == -1) { |
1050 |
se->instance_id = calculate_new_instance_id(idstr); |
1051 |
} else {
|
1052 |
se->instance_id = instance_id; |
1053 |
} |
1054 |
/* add at the end of list */
|
1055 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1056 |
return 0; |
1057 |
} |
1058 |
|
1059 |
int register_savevm(const char *idstr, |
1060 |
int instance_id,
|
1061 |
int version_id,
|
1062 |
SaveStateHandler *save_state, |
1063 |
LoadStateHandler *load_state, |
1064 |
void *opaque)
|
1065 |
{ |
1066 |
return register_savevm_live(idstr, instance_id, version_id,
|
1067 |
NULL, NULL, save_state, load_state, opaque); |
1068 |
} |
1069 |
|
1070 |
void unregister_savevm(const char *idstr, void *opaque) |
1071 |
{ |
1072 |
SaveStateEntry *se, *new_se; |
1073 |
|
1074 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1075 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
1076 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1077 |
qemu_free(se); |
1078 |
} |
1079 |
} |
1080 |
} |
1081 |
|
1082 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
1083 |
void *opaque)
|
1084 |
{ |
1085 |
SaveStateEntry *se; |
1086 |
|
1087 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1088 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
1089 |
se->version_id = vmsd->version_id; |
1090 |
se->section_id = global_section_id++; |
1091 |
se->save_live_state = NULL;
|
1092 |
se->save_state = NULL;
|
1093 |
se->load_state = NULL;
|
1094 |
se->opaque = opaque; |
1095 |
se->vmsd = vmsd; |
1096 |
|
1097 |
if (instance_id == -1) { |
1098 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
1099 |
} else {
|
1100 |
se->instance_id = instance_id; |
1101 |
} |
1102 |
/* add at the end of list */
|
1103 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1104 |
return 0; |
1105 |
} |
1106 |
|
1107 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
1108 |
{ |
1109 |
SaveStateEntry *se, *new_se; |
1110 |
|
1111 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1112 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1113 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1114 |
qemu_free(se); |
1115 |
} |
1116 |
} |
1117 |
} |
1118 |
|
1119 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1120 |
void *opaque, int version_id) |
1121 |
{ |
1122 |
VMStateField *field = vmsd->fields; |
1123 |
|
1124 |
if (version_id > vmsd->version_id) {
|
1125 |
return -EINVAL;
|
1126 |
} |
1127 |
if (version_id < vmsd->minimum_version_id_old) {
|
1128 |
return -EINVAL;
|
1129 |
} |
1130 |
if (version_id < vmsd->minimum_version_id) {
|
1131 |
return vmsd->load_state_old(f, opaque, version_id);
|
1132 |
} |
1133 |
if (vmsd->pre_load) {
|
1134 |
int ret = vmsd->pre_load(opaque);
|
1135 |
if (ret)
|
1136 |
return ret;
|
1137 |
} |
1138 |
while(field->name) {
|
1139 |
if ((field->field_exists &&
|
1140 |
field->field_exists(opaque, version_id)) || |
1141 |
(!field->field_exists && |
1142 |
field->version_id <= version_id)) { |
1143 |
void *base_addr = opaque + field->offset;
|
1144 |
int ret, i, n_elems = 1; |
1145 |
int size = field->size;
|
1146 |
|
1147 |
if (field->flags & VMS_VBUFFER) {
|
1148 |
size = *(int32_t *)(opaque+field->size_offset); |
1149 |
if (field->flags & VMS_MULTIPLY) {
|
1150 |
size *= field->size; |
1151 |
} |
1152 |
} |
1153 |
if (field->flags & VMS_ARRAY) {
|
1154 |
n_elems = field->num; |
1155 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1156 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1157 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1158 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1159 |
} |
1160 |
if (field->flags & VMS_POINTER) {
|
1161 |
base_addr = *(void **)base_addr + field->start;
|
1162 |
} |
1163 |
for (i = 0; i < n_elems; i++) { |
1164 |
void *addr = base_addr + size * i;
|
1165 |
|
1166 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1167 |
addr = *(void **)addr;
|
1168 |
} |
1169 |
if (field->flags & VMS_STRUCT) {
|
1170 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1171 |
} else {
|
1172 |
ret = field->info->get(f, addr, size); |
1173 |
|
1174 |
} |
1175 |
if (ret < 0) { |
1176 |
return ret;
|
1177 |
} |
1178 |
} |
1179 |
} |
1180 |
field++; |
1181 |
} |
1182 |
if (vmsd->post_load) {
|
1183 |
return vmsd->post_load(opaque, version_id);
|
1184 |
} |
1185 |
return 0; |
1186 |
} |
1187 |
|
1188 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1189 |
void *opaque)
|
1190 |
{ |
1191 |
VMStateField *field = vmsd->fields; |
1192 |
|
1193 |
if (vmsd->pre_save) {
|
1194 |
vmsd->pre_save(opaque); |
1195 |
} |
1196 |
while(field->name) {
|
1197 |
if (!field->field_exists ||
|
1198 |
field->field_exists(opaque, vmsd->version_id)) { |
1199 |
void *base_addr = opaque + field->offset;
|
1200 |
int i, n_elems = 1; |
1201 |
int size = field->size;
|
1202 |
|
1203 |
if (field->flags & VMS_VBUFFER) {
|
1204 |
size = *(int32_t *)(opaque+field->size_offset); |
1205 |
if (field->flags & VMS_MULTIPLY) {
|
1206 |
size *= field->size; |
1207 |
} |
1208 |
} |
1209 |
if (field->flags & VMS_ARRAY) {
|
1210 |
n_elems = field->num; |
1211 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1212 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1213 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1214 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1215 |
} |
1216 |
if (field->flags & VMS_POINTER) {
|
1217 |
base_addr = *(void **)base_addr + field->start;
|
1218 |
} |
1219 |
for (i = 0; i < n_elems; i++) { |
1220 |
void *addr = base_addr + size * i;
|
1221 |
|
1222 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1223 |
addr = *(void **)addr;
|
1224 |
} |
1225 |
if (field->flags & VMS_STRUCT) {
|
1226 |
vmstate_save_state(f, field->vmsd, addr); |
1227 |
} else {
|
1228 |
field->info->put(f, addr, size); |
1229 |
} |
1230 |
} |
1231 |
} |
1232 |
field++; |
1233 |
} |
1234 |
if (vmsd->post_save) {
|
1235 |
vmsd->post_save(opaque); |
1236 |
} |
1237 |
} |
1238 |
|
1239 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1240 |
{ |
1241 |
if (!se->vmsd) { /* Old style */ |
1242 |
return se->load_state(f, se->opaque, version_id);
|
1243 |
} |
1244 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1245 |
} |
1246 |
|
1247 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1248 |
{ |
1249 |
if (!se->vmsd) { /* Old style */ |
1250 |
se->save_state(f, se->opaque); |
1251 |
return;
|
1252 |
} |
1253 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1254 |
} |
1255 |
|
1256 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1257 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1258 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1259 |
|
1260 |
#define QEMU_VM_EOF 0x00 |
1261 |
#define QEMU_VM_SECTION_START 0x01 |
1262 |
#define QEMU_VM_SECTION_PART 0x02 |
1263 |
#define QEMU_VM_SECTION_END 0x03 |
1264 |
#define QEMU_VM_SECTION_FULL 0x04 |
1265 |
|
1266 |
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable, |
1267 |
int shared)
|
1268 |
{ |
1269 |
SaveStateEntry *se; |
1270 |
|
1271 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1272 |
if(se->set_params == NULL) { |
1273 |
continue;
|
1274 |
} |
1275 |
se->set_params(blk_enable, shared, se->opaque); |
1276 |
} |
1277 |
|
1278 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1279 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1280 |
|
1281 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1282 |
int len;
|
1283 |
|
1284 |
if (se->save_live_state == NULL) |
1285 |
continue;
|
1286 |
|
1287 |
/* Section type */
|
1288 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1289 |
qemu_put_be32(f, se->section_id); |
1290 |
|
1291 |
/* ID string */
|
1292 |
len = strlen(se->idstr); |
1293 |
qemu_put_byte(f, len); |
1294 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1295 |
|
1296 |
qemu_put_be32(f, se->instance_id); |
1297 |
qemu_put_be32(f, se->version_id); |
1298 |
|
1299 |
se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque); |
1300 |
} |
1301 |
|
1302 |
if (qemu_file_has_error(f)) {
|
1303 |
qemu_savevm_state_cancel(mon, f); |
1304 |
return -EIO;
|
1305 |
} |
1306 |
|
1307 |
return 0; |
1308 |
} |
1309 |
|
1310 |
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
|
1311 |
{ |
1312 |
SaveStateEntry *se; |
1313 |
int ret = 1; |
1314 |
|
1315 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1316 |
if (se->save_live_state == NULL) |
1317 |
continue;
|
1318 |
|
1319 |
/* Section type */
|
1320 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1321 |
qemu_put_be32(f, se->section_id); |
1322 |
|
1323 |
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque); |
1324 |
if (!ret) {
|
1325 |
/* Do not proceed to the next vmstate before this one reported
|
1326 |
completion of the current stage. This serializes the migration
|
1327 |
and reduces the probability that a faster changing state is
|
1328 |
synchronized over and over again. */
|
1329 |
break;
|
1330 |
} |
1331 |
} |
1332 |
|
1333 |
if (ret)
|
1334 |
return 1; |
1335 |
|
1336 |
if (qemu_file_has_error(f)) {
|
1337 |
qemu_savevm_state_cancel(mon, f); |
1338 |
return -EIO;
|
1339 |
} |
1340 |
|
1341 |
return 0; |
1342 |
} |
1343 |
|
1344 |
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
|
1345 |
{ |
1346 |
SaveStateEntry *se; |
1347 |
|
1348 |
cpu_synchronize_all_states(); |
1349 |
|
1350 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1351 |
if (se->save_live_state == NULL) |
1352 |
continue;
|
1353 |
|
1354 |
/* Section type */
|
1355 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1356 |
qemu_put_be32(f, se->section_id); |
1357 |
|
1358 |
se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque); |
1359 |
} |
1360 |
|
1361 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1362 |
int len;
|
1363 |
|
1364 |
if (se->save_state == NULL && se->vmsd == NULL) |
1365 |
continue;
|
1366 |
|
1367 |
/* Section type */
|
1368 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1369 |
qemu_put_be32(f, se->section_id); |
1370 |
|
1371 |
/* ID string */
|
1372 |
len = strlen(se->idstr); |
1373 |
qemu_put_byte(f, len); |
1374 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1375 |
|
1376 |
qemu_put_be32(f, se->instance_id); |
1377 |
qemu_put_be32(f, se->version_id); |
1378 |
|
1379 |
vmstate_save(f, se); |
1380 |
} |
1381 |
|
1382 |
qemu_put_byte(f, QEMU_VM_EOF); |
1383 |
|
1384 |
if (qemu_file_has_error(f))
|
1385 |
return -EIO;
|
1386 |
|
1387 |
return 0; |
1388 |
} |
1389 |
|
1390 |
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
|
1391 |
{ |
1392 |
SaveStateEntry *se; |
1393 |
|
1394 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1395 |
if (se->save_live_state) {
|
1396 |
se->save_live_state(mon, f, -1, se->opaque);
|
1397 |
} |
1398 |
} |
1399 |
} |
1400 |
|
1401 |
static int qemu_savevm_state(Monitor *mon, QEMUFile *f) |
1402 |
{ |
1403 |
int saved_vm_running;
|
1404 |
int ret;
|
1405 |
|
1406 |
saved_vm_running = vm_running; |
1407 |
vm_stop(0);
|
1408 |
|
1409 |
bdrv_flush_all(); |
1410 |
|
1411 |
ret = qemu_savevm_state_begin(mon, f, 0, 0); |
1412 |
if (ret < 0) |
1413 |
goto out;
|
1414 |
|
1415 |
do {
|
1416 |
ret = qemu_savevm_state_iterate(mon, f); |
1417 |
if (ret < 0) |
1418 |
goto out;
|
1419 |
} while (ret == 0); |
1420 |
|
1421 |
ret = qemu_savevm_state_complete(mon, f); |
1422 |
|
1423 |
out:
|
1424 |
if (qemu_file_has_error(f))
|
1425 |
ret = -EIO; |
1426 |
|
1427 |
if (!ret && saved_vm_running)
|
1428 |
vm_start(); |
1429 |
|
1430 |
return ret;
|
1431 |
} |
1432 |
|
1433 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1434 |
{ |
1435 |
SaveStateEntry *se; |
1436 |
|
1437 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1438 |
if (!strcmp(se->idstr, idstr) &&
|
1439 |
instance_id == se->instance_id) |
1440 |
return se;
|
1441 |
} |
1442 |
return NULL; |
1443 |
} |
1444 |
|
1445 |
typedef struct LoadStateEntry { |
1446 |
QLIST_ENTRY(LoadStateEntry) entry; |
1447 |
SaveStateEntry *se; |
1448 |
int section_id;
|
1449 |
int version_id;
|
1450 |
} LoadStateEntry; |
1451 |
|
1452 |
int qemu_loadvm_state(QEMUFile *f)
|
1453 |
{ |
1454 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1455 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1456 |
LoadStateEntry *le, *new_le; |
1457 |
uint8_t section_type; |
1458 |
unsigned int v; |
1459 |
int ret;
|
1460 |
|
1461 |
v = qemu_get_be32(f); |
1462 |
if (v != QEMU_VM_FILE_MAGIC)
|
1463 |
return -EINVAL;
|
1464 |
|
1465 |
v = qemu_get_be32(f); |
1466 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1467 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1468 |
return -ENOTSUP;
|
1469 |
} |
1470 |
if (v != QEMU_VM_FILE_VERSION)
|
1471 |
return -ENOTSUP;
|
1472 |
|
1473 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1474 |
uint32_t instance_id, version_id, section_id; |
1475 |
SaveStateEntry *se; |
1476 |
char idstr[257]; |
1477 |
int len;
|
1478 |
|
1479 |
switch (section_type) {
|
1480 |
case QEMU_VM_SECTION_START:
|
1481 |
case QEMU_VM_SECTION_FULL:
|
1482 |
/* Read section start */
|
1483 |
section_id = qemu_get_be32(f); |
1484 |
len = qemu_get_byte(f); |
1485 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1486 |
idstr[len] = 0;
|
1487 |
instance_id = qemu_get_be32(f); |
1488 |
version_id = qemu_get_be32(f); |
1489 |
|
1490 |
/* Find savevm section */
|
1491 |
se = find_se(idstr, instance_id); |
1492 |
if (se == NULL) { |
1493 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1494 |
ret = -EINVAL; |
1495 |
goto out;
|
1496 |
} |
1497 |
|
1498 |
/* Validate version */
|
1499 |
if (version_id > se->version_id) {
|
1500 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1501 |
version_id, idstr, se->version_id); |
1502 |
ret = -EINVAL; |
1503 |
goto out;
|
1504 |
} |
1505 |
|
1506 |
/* Add entry */
|
1507 |
le = qemu_mallocz(sizeof(*le));
|
1508 |
|
1509 |
le->se = se; |
1510 |
le->section_id = section_id; |
1511 |
le->version_id = version_id; |
1512 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1513 |
|
1514 |
ret = vmstate_load(f, le->se, le->version_id); |
1515 |
if (ret < 0) { |
1516 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1517 |
instance_id, idstr); |
1518 |
goto out;
|
1519 |
} |
1520 |
break;
|
1521 |
case QEMU_VM_SECTION_PART:
|
1522 |
case QEMU_VM_SECTION_END:
|
1523 |
section_id = qemu_get_be32(f); |
1524 |
|
1525 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1526 |
if (le->section_id == section_id) {
|
1527 |
break;
|
1528 |
} |
1529 |
} |
1530 |
if (le == NULL) { |
1531 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1532 |
ret = -EINVAL; |
1533 |
goto out;
|
1534 |
} |
1535 |
|
1536 |
ret = vmstate_load(f, le->se, le->version_id); |
1537 |
if (ret < 0) { |
1538 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1539 |
section_id); |
1540 |
goto out;
|
1541 |
} |
1542 |
break;
|
1543 |
default:
|
1544 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1545 |
ret = -EINVAL; |
1546 |
goto out;
|
1547 |
} |
1548 |
} |
1549 |
|
1550 |
cpu_synchronize_all_post_init(); |
1551 |
|
1552 |
ret = 0;
|
1553 |
|
1554 |
out:
|
1555 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1556 |
QLIST_REMOVE(le, entry); |
1557 |
qemu_free(le); |
1558 |
} |
1559 |
|
1560 |
if (qemu_file_has_error(f))
|
1561 |
ret = -EIO; |
1562 |
|
1563 |
return ret;
|
1564 |
} |
1565 |
|
1566 |
/* device can contain snapshots */
|
1567 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1568 |
{ |
1569 |
return (bs &&
|
1570 |
!bdrv_is_removable(bs) && |
1571 |
!bdrv_is_read_only(bs)); |
1572 |
} |
1573 |
|
1574 |
/* device must be snapshots in order to have a reliable snapshot */
|
1575 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1576 |
{ |
1577 |
return (bs &&
|
1578 |
!bdrv_is_removable(bs) && |
1579 |
!bdrv_is_read_only(bs)); |
1580 |
} |
1581 |
|
1582 |
static BlockDriverState *get_bs_snapshots(void) |
1583 |
{ |
1584 |
BlockDriverState *bs; |
1585 |
DriveInfo *dinfo; |
1586 |
|
1587 |
if (bs_snapshots)
|
1588 |
return bs_snapshots;
|
1589 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1590 |
bs = dinfo->bdrv; |
1591 |
if (bdrv_can_snapshot(bs))
|
1592 |
goto ok;
|
1593 |
} |
1594 |
return NULL; |
1595 |
ok:
|
1596 |
bs_snapshots = bs; |
1597 |
return bs;
|
1598 |
} |
1599 |
|
1600 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1601 |
const char *name) |
1602 |
{ |
1603 |
QEMUSnapshotInfo *sn_tab, *sn; |
1604 |
int nb_sns, i, ret;
|
1605 |
|
1606 |
ret = -ENOENT; |
1607 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1608 |
if (nb_sns < 0) |
1609 |
return ret;
|
1610 |
for(i = 0; i < nb_sns; i++) { |
1611 |
sn = &sn_tab[i]; |
1612 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1613 |
*sn_info = *sn; |
1614 |
ret = 0;
|
1615 |
break;
|
1616 |
} |
1617 |
} |
1618 |
qemu_free(sn_tab); |
1619 |
return ret;
|
1620 |
} |
1621 |
|
1622 |
/*
|
1623 |
* Deletes snapshots of a given name in all opened images.
|
1624 |
*/
|
1625 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
1626 |
{ |
1627 |
BlockDriverState *bs; |
1628 |
DriveInfo *dinfo; |
1629 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
1630 |
int ret;
|
1631 |
|
1632 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1633 |
bs = dinfo->bdrv; |
1634 |
if (bdrv_can_snapshot(bs) &&
|
1635 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
1636 |
{ |
1637 |
ret = bdrv_snapshot_delete(bs, name); |
1638 |
if (ret < 0) { |
1639 |
monitor_printf(mon, |
1640 |
"Error while deleting snapshot on '%s'\n",
|
1641 |
bdrv_get_device_name(bs)); |
1642 |
return -1; |
1643 |
} |
1644 |
} |
1645 |
} |
1646 |
|
1647 |
return 0; |
1648 |
} |
1649 |
|
1650 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1651 |
{ |
1652 |
DriveInfo *dinfo; |
1653 |
BlockDriverState *bs, *bs1; |
1654 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1655 |
int ret;
|
1656 |
QEMUFile *f; |
1657 |
int saved_vm_running;
|
1658 |
uint32_t vm_state_size; |
1659 |
#ifdef _WIN32
|
1660 |
struct _timeb tb;
|
1661 |
#else
|
1662 |
struct timeval tv;
|
1663 |
#endif
|
1664 |
const char *name = qdict_get_try_str(qdict, "name"); |
1665 |
|
1666 |
bs = get_bs_snapshots(); |
1667 |
if (!bs) {
|
1668 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1669 |
return;
|
1670 |
} |
1671 |
|
1672 |
/* ??? Should this occur after vm_stop? */
|
1673 |
qemu_aio_flush(); |
1674 |
|
1675 |
saved_vm_running = vm_running; |
1676 |
vm_stop(0);
|
1677 |
|
1678 |
memset(sn, 0, sizeof(*sn)); |
1679 |
if (name) {
|
1680 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1681 |
if (ret >= 0) { |
1682 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1683 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1684 |
} else {
|
1685 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1686 |
} |
1687 |
} |
1688 |
|
1689 |
/* fill auxiliary fields */
|
1690 |
#ifdef _WIN32
|
1691 |
_ftime(&tb); |
1692 |
sn->date_sec = tb.time; |
1693 |
sn->date_nsec = tb.millitm * 1000000;
|
1694 |
#else
|
1695 |
gettimeofday(&tv, NULL);
|
1696 |
sn->date_sec = tv.tv_sec; |
1697 |
sn->date_nsec = tv.tv_usec * 1000;
|
1698 |
#endif
|
1699 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1700 |
|
1701 |
/* Delete old snapshots of the same name */
|
1702 |
if (name && del_existing_snapshots(mon, name) < 0) { |
1703 |
goto the_end;
|
1704 |
} |
1705 |
|
1706 |
/* save the VM state */
|
1707 |
f = qemu_fopen_bdrv(bs, 1);
|
1708 |
if (!f) {
|
1709 |
monitor_printf(mon, "Could not open VM state file\n");
|
1710 |
goto the_end;
|
1711 |
} |
1712 |
ret = qemu_savevm_state(mon, f); |
1713 |
vm_state_size = qemu_ftell(f); |
1714 |
qemu_fclose(f); |
1715 |
if (ret < 0) { |
1716 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1717 |
goto the_end;
|
1718 |
} |
1719 |
|
1720 |
/* create the snapshots */
|
1721 |
|
1722 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1723 |
bs1 = dinfo->bdrv; |
1724 |
if (bdrv_has_snapshot(bs1)) {
|
1725 |
/* Write VM state size only to the image that contains the state */
|
1726 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1727 |
ret = bdrv_snapshot_create(bs1, sn); |
1728 |
if (ret < 0) { |
1729 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1730 |
bdrv_get_device_name(bs1)); |
1731 |
} |
1732 |
} |
1733 |
} |
1734 |
|
1735 |
the_end:
|
1736 |
if (saved_vm_running)
|
1737 |
vm_start(); |
1738 |
} |
1739 |
|
1740 |
int load_vmstate(const char *name) |
1741 |
{ |
1742 |
DriveInfo *dinfo; |
1743 |
BlockDriverState *bs, *bs1; |
1744 |
QEMUSnapshotInfo sn; |
1745 |
QEMUFile *f; |
1746 |
int ret;
|
1747 |
|
1748 |
bs = get_bs_snapshots(); |
1749 |
if (!bs) {
|
1750 |
qemu_error("No block device supports snapshots\n");
|
1751 |
return -EINVAL;
|
1752 |
} |
1753 |
|
1754 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1755 |
qemu_aio_flush(); |
1756 |
|
1757 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1758 |
bs1 = dinfo->bdrv; |
1759 |
if (bdrv_has_snapshot(bs1)) {
|
1760 |
ret = bdrv_snapshot_goto(bs1, name); |
1761 |
if (ret < 0) { |
1762 |
if (bs != bs1)
|
1763 |
qemu_error("Warning: ");
|
1764 |
switch(ret) {
|
1765 |
case -ENOTSUP:
|
1766 |
qemu_error("Snapshots not supported on device '%s'\n",
|
1767 |
bdrv_get_device_name(bs1)); |
1768 |
break;
|
1769 |
case -ENOENT:
|
1770 |
qemu_error("Could not find snapshot '%s' on device '%s'\n",
|
1771 |
name, bdrv_get_device_name(bs1)); |
1772 |
break;
|
1773 |
default:
|
1774 |
qemu_error("Error %d while activating snapshot on '%s'\n",
|
1775 |
ret, bdrv_get_device_name(bs1)); |
1776 |
break;
|
1777 |
} |
1778 |
/* fatal on snapshot block device */
|
1779 |
if (bs == bs1)
|
1780 |
return 0; |
1781 |
} |
1782 |
} |
1783 |
} |
1784 |
|
1785 |
/* Don't even try to load empty VM states */
|
1786 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1787 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1788 |
return -EINVAL;
|
1789 |
|
1790 |
/* restore the VM state */
|
1791 |
f = qemu_fopen_bdrv(bs, 0);
|
1792 |
if (!f) {
|
1793 |
qemu_error("Could not open VM state file\n");
|
1794 |
return -EINVAL;
|
1795 |
} |
1796 |
ret = qemu_loadvm_state(f); |
1797 |
qemu_fclose(f); |
1798 |
if (ret < 0) { |
1799 |
qemu_error("Error %d while loading VM state\n", ret);
|
1800 |
return ret;
|
1801 |
} |
1802 |
return 0; |
1803 |
} |
1804 |
|
1805 |
void do_delvm(Monitor *mon, const QDict *qdict) |
1806 |
{ |
1807 |
DriveInfo *dinfo; |
1808 |
BlockDriverState *bs, *bs1; |
1809 |
int ret;
|
1810 |
const char *name = qdict_get_str(qdict, "name"); |
1811 |
|
1812 |
bs = get_bs_snapshots(); |
1813 |
if (!bs) {
|
1814 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1815 |
return;
|
1816 |
} |
1817 |
|
1818 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1819 |
bs1 = dinfo->bdrv; |
1820 |
if (bdrv_has_snapshot(bs1)) {
|
1821 |
ret = bdrv_snapshot_delete(bs1, name); |
1822 |
if (ret < 0) { |
1823 |
if (ret == -ENOTSUP)
|
1824 |
monitor_printf(mon, |
1825 |
"Snapshots not supported on device '%s'\n",
|
1826 |
bdrv_get_device_name(bs1)); |
1827 |
else
|
1828 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1829 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1830 |
} |
1831 |
} |
1832 |
} |
1833 |
} |
1834 |
|
1835 |
void do_info_snapshots(Monitor *mon)
|
1836 |
{ |
1837 |
DriveInfo *dinfo; |
1838 |
BlockDriverState *bs, *bs1; |
1839 |
QEMUSnapshotInfo *sn_tab, *sn; |
1840 |
int nb_sns, i;
|
1841 |
char buf[256]; |
1842 |
|
1843 |
bs = get_bs_snapshots(); |
1844 |
if (!bs) {
|
1845 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1846 |
return;
|
1847 |
} |
1848 |
monitor_printf(mon, "Snapshot devices:");
|
1849 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1850 |
bs1 = dinfo->bdrv; |
1851 |
if (bdrv_has_snapshot(bs1)) {
|
1852 |
if (bs == bs1)
|
1853 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1854 |
} |
1855 |
} |
1856 |
monitor_printf(mon, "\n");
|
1857 |
|
1858 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1859 |
if (nb_sns < 0) { |
1860 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1861 |
return;
|
1862 |
} |
1863 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1864 |
bdrv_get_device_name(bs)); |
1865 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1866 |
for(i = 0; i < nb_sns; i++) { |
1867 |
sn = &sn_tab[i]; |
1868 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1869 |
} |
1870 |
qemu_free(sn_tab); |
1871 |
} |