root / savevm.c @ 74475455
History | View | Annotate | Download (54.3 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 "hw/qdev.h" |
76 |
#include "net.h" |
77 |
#include "monitor.h" |
78 |
#include "sysemu.h" |
79 |
#include "qemu-timer.h" |
80 |
#include "qemu-char.h" |
81 |
#include "audio/audio.h" |
82 |
#include "migration.h" |
83 |
#include "qemu_socket.h" |
84 |
#include "qemu-queue.h" |
85 |
|
86 |
#define SELF_ANNOUNCE_ROUNDS 5 |
87 |
|
88 |
#ifndef ETH_P_RARP
|
89 |
#define ETH_P_RARP 0x8035 |
90 |
#endif
|
91 |
#define ARP_HTYPE_ETH 0x0001 |
92 |
#define ARP_PTYPE_IP 0x0800 |
93 |
#define ARP_OP_REQUEST_REV 0x3 |
94 |
|
95 |
static int announce_self_create(uint8_t *buf, |
96 |
uint8_t *mac_addr) |
97 |
{ |
98 |
/* Ethernet header. */
|
99 |
memset(buf, 0xff, 6); /* destination MAC addr */ |
100 |
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
101 |
*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
102 |
|
103 |
/* RARP header. */
|
104 |
*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
105 |
*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
106 |
*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
107 |
*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
108 |
*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
109 |
memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
110 |
memset(buf + 28, 0x00, 4); /* source protocol addr */ |
111 |
memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
112 |
memset(buf + 38, 0x00, 4); /* target protocol addr */ |
113 |
|
114 |
/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
|
115 |
memset(buf + 42, 0x00, 18); |
116 |
|
117 |
return 60; /* len (FCS will be added by hardware) */ |
118 |
} |
119 |
|
120 |
static void qemu_announce_self_iter(NICState *nic, void *opaque) |
121 |
{ |
122 |
uint8_t buf[60];
|
123 |
int len;
|
124 |
|
125 |
len = announce_self_create(buf, nic->conf->macaddr.a); |
126 |
|
127 |
qemu_send_packet_raw(&nic->nc, buf, len); |
128 |
} |
129 |
|
130 |
|
131 |
static void qemu_announce_self_once(void *opaque) |
132 |
{ |
133 |
static int count = SELF_ANNOUNCE_ROUNDS; |
134 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
135 |
|
136 |
qemu_foreach_nic(qemu_announce_self_iter, NULL);
|
137 |
|
138 |
if (--count) {
|
139 |
/* delay 50ms, 150ms, 250ms, ... */
|
140 |
qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
141 |
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
142 |
} else {
|
143 |
qemu_del_timer(timer); |
144 |
qemu_free_timer(timer); |
145 |
} |
146 |
} |
147 |
|
148 |
void qemu_announce_self(void) |
149 |
{ |
150 |
static QEMUTimer *timer;
|
151 |
timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
152 |
qemu_announce_self_once(&timer); |
153 |
} |
154 |
|
155 |
/***********************************************************/
|
156 |
/* savevm/loadvm support */
|
157 |
|
158 |
#define IO_BUF_SIZE 32768 |
159 |
|
160 |
struct QEMUFile {
|
161 |
QEMUFilePutBufferFunc *put_buffer; |
162 |
QEMUFileGetBufferFunc *get_buffer; |
163 |
QEMUFileCloseFunc *close; |
164 |
QEMUFileRateLimit *rate_limit; |
165 |
QEMUFileSetRateLimit *set_rate_limit; |
166 |
QEMUFileGetRateLimit *get_rate_limit; |
167 |
void *opaque;
|
168 |
int is_write;
|
169 |
|
170 |
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
171 |
when reading */
|
172 |
int buf_index;
|
173 |
int buf_size; /* 0 when writing */ |
174 |
uint8_t buf[IO_BUF_SIZE]; |
175 |
|
176 |
int has_error;
|
177 |
}; |
178 |
|
179 |
typedef struct QEMUFileStdio |
180 |
{ |
181 |
FILE *stdio_file; |
182 |
QEMUFile *file; |
183 |
} QEMUFileStdio; |
184 |
|
185 |
typedef struct QEMUFileSocket |
186 |
{ |
187 |
int fd;
|
188 |
QEMUFile *file; |
189 |
} QEMUFileSocket; |
190 |
|
191 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
192 |
{ |
193 |
QEMUFileSocket *s = opaque; |
194 |
ssize_t len; |
195 |
|
196 |
do {
|
197 |
len = recv(s->fd, (void *)buf, size, 0); |
198 |
} while (len == -1 && socket_error() == EINTR); |
199 |
|
200 |
if (len == -1) |
201 |
len = -socket_error(); |
202 |
|
203 |
return len;
|
204 |
} |
205 |
|
206 |
static int socket_close(void *opaque) |
207 |
{ |
208 |
QEMUFileSocket *s = opaque; |
209 |
qemu_free(s); |
210 |
return 0; |
211 |
} |
212 |
|
213 |
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
214 |
{ |
215 |
QEMUFileStdio *s = opaque; |
216 |
return fwrite(buf, 1, size, s->stdio_file); |
217 |
} |
218 |
|
219 |
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
220 |
{ |
221 |
QEMUFileStdio *s = opaque; |
222 |
FILE *fp = s->stdio_file; |
223 |
int bytes;
|
224 |
|
225 |
do {
|
226 |
clearerr(fp); |
227 |
bytes = fread(buf, 1, size, fp);
|
228 |
} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
229 |
return bytes;
|
230 |
} |
231 |
|
232 |
static int stdio_pclose(void *opaque) |
233 |
{ |
234 |
QEMUFileStdio *s = opaque; |
235 |
int ret;
|
236 |
ret = pclose(s->stdio_file); |
237 |
qemu_free(s); |
238 |
return ret;
|
239 |
} |
240 |
|
241 |
static int stdio_fclose(void *opaque) |
242 |
{ |
243 |
QEMUFileStdio *s = opaque; |
244 |
fclose(s->stdio_file); |
245 |
qemu_free(s); |
246 |
return 0; |
247 |
} |
248 |
|
249 |
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
250 |
{ |
251 |
QEMUFileStdio *s; |
252 |
|
253 |
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
254 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
255 |
return NULL; |
256 |
} |
257 |
|
258 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
259 |
|
260 |
s->stdio_file = stdio_file; |
261 |
|
262 |
if(mode[0] == 'r') { |
263 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
|
264 |
NULL, NULL, NULL); |
265 |
} else {
|
266 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
|
267 |
NULL, NULL, NULL); |
268 |
} |
269 |
return s->file;
|
270 |
} |
271 |
|
272 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
273 |
{ |
274 |
FILE *popen_file; |
275 |
|
276 |
popen_file = popen(command, mode); |
277 |
if(popen_file == NULL) { |
278 |
return NULL; |
279 |
} |
280 |
|
281 |
return qemu_popen(popen_file, mode);
|
282 |
} |
283 |
|
284 |
int qemu_stdio_fd(QEMUFile *f)
|
285 |
{ |
286 |
QEMUFileStdio *p; |
287 |
int fd;
|
288 |
|
289 |
p = (QEMUFileStdio *)f->opaque; |
290 |
fd = fileno(p->stdio_file); |
291 |
|
292 |
return fd;
|
293 |
} |
294 |
|
295 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
296 |
{ |
297 |
QEMUFileStdio *s; |
298 |
|
299 |
if (mode == NULL || |
300 |
(mode[0] != 'r' && mode[0] != 'w') || |
301 |
mode[1] != 'b' || mode[2] != 0) { |
302 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
303 |
return NULL; |
304 |
} |
305 |
|
306 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
307 |
s->stdio_file = fdopen(fd, mode); |
308 |
if (!s->stdio_file)
|
309 |
goto fail;
|
310 |
|
311 |
if(mode[0] == 'r') { |
312 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
|
313 |
NULL, NULL, NULL); |
314 |
} else {
|
315 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
|
316 |
NULL, NULL, NULL); |
317 |
} |
318 |
return s->file;
|
319 |
|
320 |
fail:
|
321 |
qemu_free(s); |
322 |
return NULL; |
323 |
} |
324 |
|
325 |
QEMUFile *qemu_fopen_socket(int fd)
|
326 |
{ |
327 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
328 |
|
329 |
s->fd = fd; |
330 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
|
331 |
NULL, NULL, NULL); |
332 |
return s->file;
|
333 |
} |
334 |
|
335 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
336 |
int64_t pos, int size)
|
337 |
{ |
338 |
QEMUFileStdio *s = opaque; |
339 |
fseek(s->stdio_file, pos, SEEK_SET); |
340 |
return fwrite(buf, 1, size, s->stdio_file); |
341 |
} |
342 |
|
343 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
344 |
{ |
345 |
QEMUFileStdio *s = opaque; |
346 |
fseek(s->stdio_file, pos, SEEK_SET); |
347 |
return fread(buf, 1, size, s->stdio_file); |
348 |
} |
349 |
|
350 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
351 |
{ |
352 |
QEMUFileStdio *s; |
353 |
|
354 |
if (mode == NULL || |
355 |
(mode[0] != 'r' && mode[0] != 'w') || |
356 |
mode[1] != 'b' || mode[2] != 0) { |
357 |
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
|
358 |
return NULL; |
359 |
} |
360 |
|
361 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
362 |
|
363 |
s->stdio_file = fopen(filename, mode); |
364 |
if (!s->stdio_file)
|
365 |
goto fail;
|
366 |
|
367 |
if(mode[0] == 'w') { |
368 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
|
369 |
NULL, NULL, NULL); |
370 |
} else {
|
371 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
|
372 |
NULL, NULL, NULL); |
373 |
} |
374 |
return s->file;
|
375 |
fail:
|
376 |
qemu_free(s); |
377 |
return NULL; |
378 |
} |
379 |
|
380 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
381 |
int64_t pos, int size)
|
382 |
{ |
383 |
bdrv_save_vmstate(opaque, buf, pos, size); |
384 |
return size;
|
385 |
} |
386 |
|
387 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
388 |
{ |
389 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
390 |
} |
391 |
|
392 |
static int bdrv_fclose(void *opaque) |
393 |
{ |
394 |
return 0; |
395 |
} |
396 |
|
397 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
398 |
{ |
399 |
if (is_writable)
|
400 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
401 |
NULL, NULL, NULL); |
402 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
403 |
} |
404 |
|
405 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
406 |
QEMUFileGetBufferFunc *get_buffer, |
407 |
QEMUFileCloseFunc *close, |
408 |
QEMUFileRateLimit *rate_limit, |
409 |
QEMUFileSetRateLimit *set_rate_limit, |
410 |
QEMUFileGetRateLimit *get_rate_limit) |
411 |
{ |
412 |
QEMUFile *f; |
413 |
|
414 |
f = qemu_mallocz(sizeof(QEMUFile));
|
415 |
|
416 |
f->opaque = opaque; |
417 |
f->put_buffer = put_buffer; |
418 |
f->get_buffer = get_buffer; |
419 |
f->close = close; |
420 |
f->rate_limit = rate_limit; |
421 |
f->set_rate_limit = set_rate_limit; |
422 |
f->get_rate_limit = get_rate_limit; |
423 |
f->is_write = 0;
|
424 |
|
425 |
return f;
|
426 |
} |
427 |
|
428 |
int qemu_file_has_error(QEMUFile *f)
|
429 |
{ |
430 |
return f->has_error;
|
431 |
} |
432 |
|
433 |
void qemu_file_set_error(QEMUFile *f)
|
434 |
{ |
435 |
f->has_error = 1;
|
436 |
} |
437 |
|
438 |
void qemu_fflush(QEMUFile *f)
|
439 |
{ |
440 |
if (!f->put_buffer)
|
441 |
return;
|
442 |
|
443 |
if (f->is_write && f->buf_index > 0) { |
444 |
int len;
|
445 |
|
446 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
447 |
if (len > 0) |
448 |
f->buf_offset += f->buf_index; |
449 |
else
|
450 |
f->has_error = 1;
|
451 |
f->buf_index = 0;
|
452 |
} |
453 |
} |
454 |
|
455 |
static void qemu_fill_buffer(QEMUFile *f) |
456 |
{ |
457 |
int len;
|
458 |
|
459 |
if (!f->get_buffer)
|
460 |
return;
|
461 |
|
462 |
if (f->is_write)
|
463 |
abort(); |
464 |
|
465 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
466 |
if (len > 0) { |
467 |
f->buf_index = 0;
|
468 |
f->buf_size = len; |
469 |
f->buf_offset += len; |
470 |
} else if (len != -EAGAIN) |
471 |
f->has_error = 1;
|
472 |
} |
473 |
|
474 |
int qemu_fclose(QEMUFile *f)
|
475 |
{ |
476 |
int ret = 0; |
477 |
qemu_fflush(f); |
478 |
if (f->close)
|
479 |
ret = f->close(f->opaque); |
480 |
qemu_free(f); |
481 |
return ret;
|
482 |
} |
483 |
|
484 |
void qemu_file_put_notify(QEMUFile *f)
|
485 |
{ |
486 |
f->put_buffer(f->opaque, NULL, 0, 0); |
487 |
} |
488 |
|
489 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
490 |
{ |
491 |
int l;
|
492 |
|
493 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
494 |
fprintf(stderr, |
495 |
"Attempted to write to buffer while read buffer is not empty\n");
|
496 |
abort(); |
497 |
} |
498 |
|
499 |
while (!f->has_error && size > 0) { |
500 |
l = IO_BUF_SIZE - f->buf_index; |
501 |
if (l > size)
|
502 |
l = size; |
503 |
memcpy(f->buf + f->buf_index, buf, l); |
504 |
f->is_write = 1;
|
505 |
f->buf_index += l; |
506 |
buf += l; |
507 |
size -= l; |
508 |
if (f->buf_index >= IO_BUF_SIZE)
|
509 |
qemu_fflush(f); |
510 |
} |
511 |
} |
512 |
|
513 |
void qemu_put_byte(QEMUFile *f, int v) |
514 |
{ |
515 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
516 |
fprintf(stderr, |
517 |
"Attempted to write to buffer while read buffer is not empty\n");
|
518 |
abort(); |
519 |
} |
520 |
|
521 |
f->buf[f->buf_index++] = v; |
522 |
f->is_write = 1;
|
523 |
if (f->buf_index >= IO_BUF_SIZE)
|
524 |
qemu_fflush(f); |
525 |
} |
526 |
|
527 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
528 |
{ |
529 |
int size, l;
|
530 |
|
531 |
if (f->is_write)
|
532 |
abort(); |
533 |
|
534 |
size = size1; |
535 |
while (size > 0) { |
536 |
l = f->buf_size - f->buf_index; |
537 |
if (l == 0) { |
538 |
qemu_fill_buffer(f); |
539 |
l = f->buf_size - f->buf_index; |
540 |
if (l == 0) |
541 |
break;
|
542 |
} |
543 |
if (l > size)
|
544 |
l = size; |
545 |
memcpy(buf, f->buf + f->buf_index, l); |
546 |
f->buf_index += l; |
547 |
buf += l; |
548 |
size -= l; |
549 |
} |
550 |
return size1 - size;
|
551 |
} |
552 |
|
553 |
static int qemu_peek_byte(QEMUFile *f) |
554 |
{ |
555 |
if (f->is_write)
|
556 |
abort(); |
557 |
|
558 |
if (f->buf_index >= f->buf_size) {
|
559 |
qemu_fill_buffer(f); |
560 |
if (f->buf_index >= f->buf_size)
|
561 |
return 0; |
562 |
} |
563 |
return f->buf[f->buf_index];
|
564 |
} |
565 |
|
566 |
int qemu_get_byte(QEMUFile *f)
|
567 |
{ |
568 |
if (f->is_write)
|
569 |
abort(); |
570 |
|
571 |
if (f->buf_index >= f->buf_size) {
|
572 |
qemu_fill_buffer(f); |
573 |
if (f->buf_index >= f->buf_size)
|
574 |
return 0; |
575 |
} |
576 |
return f->buf[f->buf_index++];
|
577 |
} |
578 |
|
579 |
int64_t qemu_ftell(QEMUFile *f) |
580 |
{ |
581 |
return f->buf_offset - f->buf_size + f->buf_index;
|
582 |
} |
583 |
|
584 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
585 |
{ |
586 |
if (whence == SEEK_SET) {
|
587 |
/* nothing to do */
|
588 |
} else if (whence == SEEK_CUR) { |
589 |
pos += qemu_ftell(f); |
590 |
} else {
|
591 |
/* SEEK_END not supported */
|
592 |
return -1; |
593 |
} |
594 |
if (f->put_buffer) {
|
595 |
qemu_fflush(f); |
596 |
f->buf_offset = pos; |
597 |
} else {
|
598 |
f->buf_offset = pos; |
599 |
f->buf_index = 0;
|
600 |
f->buf_size = 0;
|
601 |
} |
602 |
return pos;
|
603 |
} |
604 |
|
605 |
int qemu_file_rate_limit(QEMUFile *f)
|
606 |
{ |
607 |
if (f->rate_limit)
|
608 |
return f->rate_limit(f->opaque);
|
609 |
|
610 |
return 0; |
611 |
} |
612 |
|
613 |
int64_t qemu_file_get_rate_limit(QEMUFile *f) |
614 |
{ |
615 |
if (f->get_rate_limit)
|
616 |
return f->get_rate_limit(f->opaque);
|
617 |
|
618 |
return 0; |
619 |
} |
620 |
|
621 |
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
622 |
{ |
623 |
/* any failed or completed migration keeps its state to allow probing of
|
624 |
* migration data, but has no associated file anymore */
|
625 |
if (f && f->set_rate_limit)
|
626 |
return f->set_rate_limit(f->opaque, new_rate);
|
627 |
|
628 |
return 0; |
629 |
} |
630 |
|
631 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
632 |
{ |
633 |
qemu_put_byte(f, v >> 8);
|
634 |
qemu_put_byte(f, v); |
635 |
} |
636 |
|
637 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
638 |
{ |
639 |
qemu_put_byte(f, v >> 24);
|
640 |
qemu_put_byte(f, v >> 16);
|
641 |
qemu_put_byte(f, v >> 8);
|
642 |
qemu_put_byte(f, v); |
643 |
} |
644 |
|
645 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
646 |
{ |
647 |
qemu_put_be32(f, v >> 32);
|
648 |
qemu_put_be32(f, v); |
649 |
} |
650 |
|
651 |
unsigned int qemu_get_be16(QEMUFile *f) |
652 |
{ |
653 |
unsigned int v; |
654 |
v = qemu_get_byte(f) << 8;
|
655 |
v |= qemu_get_byte(f); |
656 |
return v;
|
657 |
} |
658 |
|
659 |
unsigned int qemu_get_be32(QEMUFile *f) |
660 |
{ |
661 |
unsigned int v; |
662 |
v = qemu_get_byte(f) << 24;
|
663 |
v |= qemu_get_byte(f) << 16;
|
664 |
v |= qemu_get_byte(f) << 8;
|
665 |
v |= qemu_get_byte(f); |
666 |
return v;
|
667 |
} |
668 |
|
669 |
uint64_t qemu_get_be64(QEMUFile *f) |
670 |
{ |
671 |
uint64_t v; |
672 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
673 |
v |= qemu_get_be32(f); |
674 |
return v;
|
675 |
} |
676 |
|
677 |
/* bool */
|
678 |
|
679 |
static int get_bool(QEMUFile *f, void *pv, size_t size) |
680 |
{ |
681 |
bool *v = pv;
|
682 |
*v = qemu_get_byte(f); |
683 |
return 0; |
684 |
} |
685 |
|
686 |
static void put_bool(QEMUFile *f, void *pv, size_t size) |
687 |
{ |
688 |
bool *v = pv;
|
689 |
qemu_put_byte(f, *v); |
690 |
} |
691 |
|
692 |
const VMStateInfo vmstate_info_bool = {
|
693 |
.name = "bool",
|
694 |
.get = get_bool, |
695 |
.put = put_bool, |
696 |
}; |
697 |
|
698 |
/* 8 bit int */
|
699 |
|
700 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
701 |
{ |
702 |
int8_t *v = pv; |
703 |
qemu_get_s8s(f, v); |
704 |
return 0; |
705 |
} |
706 |
|
707 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
708 |
{ |
709 |
int8_t *v = pv; |
710 |
qemu_put_s8s(f, v); |
711 |
} |
712 |
|
713 |
const VMStateInfo vmstate_info_int8 = {
|
714 |
.name = "int8",
|
715 |
.get = get_int8, |
716 |
.put = put_int8, |
717 |
}; |
718 |
|
719 |
/* 16 bit int */
|
720 |
|
721 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
722 |
{ |
723 |
int16_t *v = pv; |
724 |
qemu_get_sbe16s(f, v); |
725 |
return 0; |
726 |
} |
727 |
|
728 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
729 |
{ |
730 |
int16_t *v = pv; |
731 |
qemu_put_sbe16s(f, v); |
732 |
} |
733 |
|
734 |
const VMStateInfo vmstate_info_int16 = {
|
735 |
.name = "int16",
|
736 |
.get = get_int16, |
737 |
.put = put_int16, |
738 |
}; |
739 |
|
740 |
/* 32 bit int */
|
741 |
|
742 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
743 |
{ |
744 |
int32_t *v = pv; |
745 |
qemu_get_sbe32s(f, v); |
746 |
return 0; |
747 |
} |
748 |
|
749 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
750 |
{ |
751 |
int32_t *v = pv; |
752 |
qemu_put_sbe32s(f, v); |
753 |
} |
754 |
|
755 |
const VMStateInfo vmstate_info_int32 = {
|
756 |
.name = "int32",
|
757 |
.get = get_int32, |
758 |
.put = put_int32, |
759 |
}; |
760 |
|
761 |
/* 32 bit int. See that the received value is the same than the one
|
762 |
in the field */
|
763 |
|
764 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
765 |
{ |
766 |
int32_t *v = pv; |
767 |
int32_t v2; |
768 |
qemu_get_sbe32s(f, &v2); |
769 |
|
770 |
if (*v == v2)
|
771 |
return 0; |
772 |
return -EINVAL;
|
773 |
} |
774 |
|
775 |
const VMStateInfo vmstate_info_int32_equal = {
|
776 |
.name = "int32 equal",
|
777 |
.get = get_int32_equal, |
778 |
.put = put_int32, |
779 |
}; |
780 |
|
781 |
/* 32 bit int. See that the received value is the less or the same
|
782 |
than the one in the field */
|
783 |
|
784 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
785 |
{ |
786 |
int32_t *old = pv; |
787 |
int32_t new; |
788 |
qemu_get_sbe32s(f, &new); |
789 |
|
790 |
if (*old <= new)
|
791 |
return 0; |
792 |
return -EINVAL;
|
793 |
} |
794 |
|
795 |
const VMStateInfo vmstate_info_int32_le = {
|
796 |
.name = "int32 equal",
|
797 |
.get = get_int32_le, |
798 |
.put = put_int32, |
799 |
}; |
800 |
|
801 |
/* 64 bit int */
|
802 |
|
803 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
804 |
{ |
805 |
int64_t *v = pv; |
806 |
qemu_get_sbe64s(f, v); |
807 |
return 0; |
808 |
} |
809 |
|
810 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
811 |
{ |
812 |
int64_t *v = pv; |
813 |
qemu_put_sbe64s(f, v); |
814 |
} |
815 |
|
816 |
const VMStateInfo vmstate_info_int64 = {
|
817 |
.name = "int64",
|
818 |
.get = get_int64, |
819 |
.put = put_int64, |
820 |
}; |
821 |
|
822 |
/* 8 bit unsigned int */
|
823 |
|
824 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
825 |
{ |
826 |
uint8_t *v = pv; |
827 |
qemu_get_8s(f, v); |
828 |
return 0; |
829 |
} |
830 |
|
831 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
832 |
{ |
833 |
uint8_t *v = pv; |
834 |
qemu_put_8s(f, v); |
835 |
} |
836 |
|
837 |
const VMStateInfo vmstate_info_uint8 = {
|
838 |
.name = "uint8",
|
839 |
.get = get_uint8, |
840 |
.put = put_uint8, |
841 |
}; |
842 |
|
843 |
/* 16 bit unsigned int */
|
844 |
|
845 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
846 |
{ |
847 |
uint16_t *v = pv; |
848 |
qemu_get_be16s(f, v); |
849 |
return 0; |
850 |
} |
851 |
|
852 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
853 |
{ |
854 |
uint16_t *v = pv; |
855 |
qemu_put_be16s(f, v); |
856 |
} |
857 |
|
858 |
const VMStateInfo vmstate_info_uint16 = {
|
859 |
.name = "uint16",
|
860 |
.get = get_uint16, |
861 |
.put = put_uint16, |
862 |
}; |
863 |
|
864 |
/* 32 bit unsigned int */
|
865 |
|
866 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
867 |
{ |
868 |
uint32_t *v = pv; |
869 |
qemu_get_be32s(f, v); |
870 |
return 0; |
871 |
} |
872 |
|
873 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
874 |
{ |
875 |
uint32_t *v = pv; |
876 |
qemu_put_be32s(f, v); |
877 |
} |
878 |
|
879 |
const VMStateInfo vmstate_info_uint32 = {
|
880 |
.name = "uint32",
|
881 |
.get = get_uint32, |
882 |
.put = put_uint32, |
883 |
}; |
884 |
|
885 |
/* 32 bit uint. See that the received value is the same than the one
|
886 |
in the field */
|
887 |
|
888 |
static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
889 |
{ |
890 |
uint32_t *v = pv; |
891 |
uint32_t v2; |
892 |
qemu_get_be32s(f, &v2); |
893 |
|
894 |
if (*v == v2) {
|
895 |
return 0; |
896 |
} |
897 |
return -EINVAL;
|
898 |
} |
899 |
|
900 |
const VMStateInfo vmstate_info_uint32_equal = {
|
901 |
.name = "uint32 equal",
|
902 |
.get = get_uint32_equal, |
903 |
.put = put_uint32, |
904 |
}; |
905 |
|
906 |
/* 64 bit unsigned int */
|
907 |
|
908 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
909 |
{ |
910 |
uint64_t *v = pv; |
911 |
qemu_get_be64s(f, v); |
912 |
return 0; |
913 |
} |
914 |
|
915 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
916 |
{ |
917 |
uint64_t *v = pv; |
918 |
qemu_put_be64s(f, v); |
919 |
} |
920 |
|
921 |
const VMStateInfo vmstate_info_uint64 = {
|
922 |
.name = "uint64",
|
923 |
.get = get_uint64, |
924 |
.put = put_uint64, |
925 |
}; |
926 |
|
927 |
/* 8 bit int. See that the received value is the same than the one
|
928 |
in the field */
|
929 |
|
930 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
931 |
{ |
932 |
uint8_t *v = pv; |
933 |
uint8_t v2; |
934 |
qemu_get_8s(f, &v2); |
935 |
|
936 |
if (*v == v2)
|
937 |
return 0; |
938 |
return -EINVAL;
|
939 |
} |
940 |
|
941 |
const VMStateInfo vmstate_info_uint8_equal = {
|
942 |
.name = "uint8 equal",
|
943 |
.get = get_uint8_equal, |
944 |
.put = put_uint8, |
945 |
}; |
946 |
|
947 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
948 |
in the field */
|
949 |
|
950 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
951 |
{ |
952 |
uint16_t *v = pv; |
953 |
uint16_t v2; |
954 |
qemu_get_be16s(f, &v2); |
955 |
|
956 |
if (*v == v2)
|
957 |
return 0; |
958 |
return -EINVAL;
|
959 |
} |
960 |
|
961 |
const VMStateInfo vmstate_info_uint16_equal = {
|
962 |
.name = "uint16 equal",
|
963 |
.get = get_uint16_equal, |
964 |
.put = put_uint16, |
965 |
}; |
966 |
|
967 |
/* timers */
|
968 |
|
969 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
970 |
{ |
971 |
QEMUTimer *v = pv; |
972 |
qemu_get_timer(f, v); |
973 |
return 0; |
974 |
} |
975 |
|
976 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
977 |
{ |
978 |
QEMUTimer *v = pv; |
979 |
qemu_put_timer(f, v); |
980 |
} |
981 |
|
982 |
const VMStateInfo vmstate_info_timer = {
|
983 |
.name = "timer",
|
984 |
.get = get_timer, |
985 |
.put = put_timer, |
986 |
}; |
987 |
|
988 |
/* uint8_t buffers */
|
989 |
|
990 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
991 |
{ |
992 |
uint8_t *v = pv; |
993 |
qemu_get_buffer(f, v, size); |
994 |
return 0; |
995 |
} |
996 |
|
997 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
998 |
{ |
999 |
uint8_t *v = pv; |
1000 |
qemu_put_buffer(f, v, size); |
1001 |
} |
1002 |
|
1003 |
const VMStateInfo vmstate_info_buffer = {
|
1004 |
.name = "buffer",
|
1005 |
.get = get_buffer, |
1006 |
.put = put_buffer, |
1007 |
}; |
1008 |
|
1009 |
/* unused buffers: space that was used for some fields that are
|
1010 |
not usefull anymore */
|
1011 |
|
1012 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1013 |
{ |
1014 |
uint8_t buf[1024];
|
1015 |
int block_len;
|
1016 |
|
1017 |
while (size > 0) { |
1018 |
block_len = MIN(sizeof(buf), size);
|
1019 |
size -= block_len; |
1020 |
qemu_get_buffer(f, buf, block_len); |
1021 |
} |
1022 |
return 0; |
1023 |
} |
1024 |
|
1025 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1026 |
{ |
1027 |
static const uint8_t buf[1024]; |
1028 |
int block_len;
|
1029 |
|
1030 |
while (size > 0) { |
1031 |
block_len = MIN(sizeof(buf), size);
|
1032 |
size -= block_len; |
1033 |
qemu_put_buffer(f, buf, block_len); |
1034 |
} |
1035 |
} |
1036 |
|
1037 |
const VMStateInfo vmstate_info_unused_buffer = {
|
1038 |
.name = "unused_buffer",
|
1039 |
.get = get_unused_buffer, |
1040 |
.put = put_unused_buffer, |
1041 |
}; |
1042 |
|
1043 |
typedef struct CompatEntry { |
1044 |
char idstr[256]; |
1045 |
int instance_id;
|
1046 |
} CompatEntry; |
1047 |
|
1048 |
typedef struct SaveStateEntry { |
1049 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
1050 |
char idstr[256]; |
1051 |
int instance_id;
|
1052 |
int alias_id;
|
1053 |
int version_id;
|
1054 |
int section_id;
|
1055 |
SaveSetParamsHandler *set_params; |
1056 |
SaveLiveStateHandler *save_live_state; |
1057 |
SaveStateHandler *save_state; |
1058 |
LoadStateHandler *load_state; |
1059 |
const VMStateDescription *vmsd;
|
1060 |
void *opaque;
|
1061 |
CompatEntry *compat; |
1062 |
int no_migrate;
|
1063 |
} SaveStateEntry; |
1064 |
|
1065 |
|
1066 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
1067 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
1068 |
static int global_section_id; |
1069 |
|
1070 |
static int calculate_new_instance_id(const char *idstr) |
1071 |
{ |
1072 |
SaveStateEntry *se; |
1073 |
int instance_id = 0; |
1074 |
|
1075 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1076 |
if (strcmp(idstr, se->idstr) == 0 |
1077 |
&& instance_id <= se->instance_id) { |
1078 |
instance_id = se->instance_id + 1;
|
1079 |
} |
1080 |
} |
1081 |
return instance_id;
|
1082 |
} |
1083 |
|
1084 |
static int calculate_compat_instance_id(const char *idstr) |
1085 |
{ |
1086 |
SaveStateEntry *se; |
1087 |
int instance_id = 0; |
1088 |
|
1089 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1090 |
if (!se->compat)
|
1091 |
continue;
|
1092 |
|
1093 |
if (strcmp(idstr, se->compat->idstr) == 0 |
1094 |
&& instance_id <= se->compat->instance_id) { |
1095 |
instance_id = se->compat->instance_id + 1;
|
1096 |
} |
1097 |
} |
1098 |
return instance_id;
|
1099 |
} |
1100 |
|
1101 |
/* TODO: Individual devices generally have very little idea about the rest
|
1102 |
of the system, so instance_id should be removed/replaced.
|
1103 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
1104 |
distinguishing id for all instances of your device class. */
|
1105 |
int register_savevm_live(DeviceState *dev,
|
1106 |
const char *idstr, |
1107 |
int instance_id,
|
1108 |
int version_id,
|
1109 |
SaveSetParamsHandler *set_params, |
1110 |
SaveLiveStateHandler *save_live_state, |
1111 |
SaveStateHandler *save_state, |
1112 |
LoadStateHandler *load_state, |
1113 |
void *opaque)
|
1114 |
{ |
1115 |
SaveStateEntry *se; |
1116 |
|
1117 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1118 |
se->version_id = version_id; |
1119 |
se->section_id = global_section_id++; |
1120 |
se->set_params = set_params; |
1121 |
se->save_live_state = save_live_state; |
1122 |
se->save_state = save_state; |
1123 |
se->load_state = load_state; |
1124 |
se->opaque = opaque; |
1125 |
se->vmsd = NULL;
|
1126 |
se->no_migrate = 0;
|
1127 |
|
1128 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1129 |
char *id = dev->parent_bus->info->get_dev_path(dev);
|
1130 |
if (id) {
|
1131 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1132 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1133 |
qemu_free(id); |
1134 |
|
1135 |
se->compat = qemu_mallocz(sizeof(CompatEntry));
|
1136 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
1137 |
se->compat->instance_id = instance_id == -1 ?
|
1138 |
calculate_compat_instance_id(idstr) : instance_id; |
1139 |
instance_id = -1;
|
1140 |
} |
1141 |
} |
1142 |
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
1143 |
|
1144 |
if (instance_id == -1) { |
1145 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1146 |
} else {
|
1147 |
se->instance_id = instance_id; |
1148 |
} |
1149 |
assert(!se->compat || se->instance_id == 0);
|
1150 |
/* add at the end of list */
|
1151 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1152 |
return 0; |
1153 |
} |
1154 |
|
1155 |
int register_savevm(DeviceState *dev,
|
1156 |
const char *idstr, |
1157 |
int instance_id,
|
1158 |
int version_id,
|
1159 |
SaveStateHandler *save_state, |
1160 |
LoadStateHandler *load_state, |
1161 |
void *opaque)
|
1162 |
{ |
1163 |
return register_savevm_live(dev, idstr, instance_id, version_id,
|
1164 |
NULL, NULL, save_state, load_state, opaque); |
1165 |
} |
1166 |
|
1167 |
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
1168 |
{ |
1169 |
SaveStateEntry *se, *new_se; |
1170 |
char id[256] = ""; |
1171 |
|
1172 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1173 |
char *path = dev->parent_bus->info->get_dev_path(dev);
|
1174 |
if (path) {
|
1175 |
pstrcpy(id, sizeof(id), path);
|
1176 |
pstrcat(id, sizeof(id), "/"); |
1177 |
qemu_free(path); |
1178 |
} |
1179 |
} |
1180 |
pstrcat(id, sizeof(id), idstr);
|
1181 |
|
1182 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1183 |
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
1184 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1185 |
if (se->compat) {
|
1186 |
qemu_free(se->compat); |
1187 |
} |
1188 |
qemu_free(se); |
1189 |
} |
1190 |
} |
1191 |
} |
1192 |
|
1193 |
/* mark a device as not to be migrated, that is the device should be
|
1194 |
unplugged before migration */
|
1195 |
void register_device_unmigratable(DeviceState *dev, const char *idstr, |
1196 |
void *opaque)
|
1197 |
{ |
1198 |
SaveStateEntry *se; |
1199 |
char id[256] = ""; |
1200 |
|
1201 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1202 |
char *path = dev->parent_bus->info->get_dev_path(dev);
|
1203 |
if (path) {
|
1204 |
pstrcpy(id, sizeof(id), path);
|
1205 |
pstrcat(id, sizeof(id), "/"); |
1206 |
qemu_free(path); |
1207 |
} |
1208 |
} |
1209 |
pstrcat(id, sizeof(id), idstr);
|
1210 |
|
1211 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1212 |
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
1213 |
se->no_migrate = 1;
|
1214 |
} |
1215 |
} |
1216 |
} |
1217 |
|
1218 |
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
1219 |
const VMStateDescription *vmsd,
|
1220 |
void *opaque, int alias_id, |
1221 |
int required_for_version)
|
1222 |
{ |
1223 |
SaveStateEntry *se; |
1224 |
|
1225 |
/* If this triggers, alias support can be dropped for the vmsd. */
|
1226 |
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
1227 |
|
1228 |
se = qemu_mallocz(sizeof(SaveStateEntry));
|
1229 |
se->version_id = vmsd->version_id; |
1230 |
se->section_id = global_section_id++; |
1231 |
se->save_live_state = NULL;
|
1232 |
se->save_state = NULL;
|
1233 |
se->load_state = NULL;
|
1234 |
se->opaque = opaque; |
1235 |
se->vmsd = vmsd; |
1236 |
se->alias_id = alias_id; |
1237 |
|
1238 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1239 |
char *id = dev->parent_bus->info->get_dev_path(dev);
|
1240 |
if (id) {
|
1241 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1242 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1243 |
qemu_free(id); |
1244 |
|
1245 |
se->compat = qemu_mallocz(sizeof(CompatEntry));
|
1246 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
1247 |
se->compat->instance_id = instance_id == -1 ?
|
1248 |
calculate_compat_instance_id(vmsd->name) : instance_id; |
1249 |
instance_id = -1;
|
1250 |
} |
1251 |
} |
1252 |
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
1253 |
|
1254 |
if (instance_id == -1) { |
1255 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1256 |
} else {
|
1257 |
se->instance_id = instance_id; |
1258 |
} |
1259 |
assert(!se->compat || se->instance_id == 0);
|
1260 |
/* add at the end of list */
|
1261 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1262 |
return 0; |
1263 |
} |
1264 |
|
1265 |
int vmstate_register(DeviceState *dev, int instance_id, |
1266 |
const VMStateDescription *vmsd, void *opaque) |
1267 |
{ |
1268 |
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
|
1269 |
opaque, -1, 0); |
1270 |
} |
1271 |
|
1272 |
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1273 |
void *opaque)
|
1274 |
{ |
1275 |
SaveStateEntry *se, *new_se; |
1276 |
|
1277 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1278 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1279 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1280 |
if (se->compat) {
|
1281 |
qemu_free(se->compat); |
1282 |
} |
1283 |
qemu_free(se); |
1284 |
} |
1285 |
} |
1286 |
} |
1287 |
|
1288 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1289 |
void *opaque);
|
1290 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1291 |
void *opaque);
|
1292 |
|
1293 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1294 |
void *opaque, int version_id) |
1295 |
{ |
1296 |
VMStateField *field = vmsd->fields; |
1297 |
int ret;
|
1298 |
|
1299 |
if (version_id > vmsd->version_id) {
|
1300 |
return -EINVAL;
|
1301 |
} |
1302 |
if (version_id < vmsd->minimum_version_id_old) {
|
1303 |
return -EINVAL;
|
1304 |
} |
1305 |
if (version_id < vmsd->minimum_version_id) {
|
1306 |
return vmsd->load_state_old(f, opaque, version_id);
|
1307 |
} |
1308 |
if (vmsd->pre_load) {
|
1309 |
int ret = vmsd->pre_load(opaque);
|
1310 |
if (ret)
|
1311 |
return ret;
|
1312 |
} |
1313 |
while(field->name) {
|
1314 |
if ((field->field_exists &&
|
1315 |
field->field_exists(opaque, version_id)) || |
1316 |
(!field->field_exists && |
1317 |
field->version_id <= version_id)) { |
1318 |
void *base_addr = opaque + field->offset;
|
1319 |
int i, n_elems = 1; |
1320 |
int size = field->size;
|
1321 |
|
1322 |
if (field->flags & VMS_VBUFFER) {
|
1323 |
size = *(int32_t *)(opaque+field->size_offset); |
1324 |
if (field->flags & VMS_MULTIPLY) {
|
1325 |
size *= field->size; |
1326 |
} |
1327 |
} |
1328 |
if (field->flags & VMS_ARRAY) {
|
1329 |
n_elems = field->num; |
1330 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1331 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1332 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
1333 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
1334 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1335 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1336 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
1337 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
1338 |
} |
1339 |
if (field->flags & VMS_POINTER) {
|
1340 |
base_addr = *(void **)base_addr + field->start;
|
1341 |
} |
1342 |
for (i = 0; i < n_elems; i++) { |
1343 |
void *addr = base_addr + size * i;
|
1344 |
|
1345 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1346 |
addr = *(void **)addr;
|
1347 |
} |
1348 |
if (field->flags & VMS_STRUCT) {
|
1349 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1350 |
} else {
|
1351 |
ret = field->info->get(f, addr, size); |
1352 |
|
1353 |
} |
1354 |
if (ret < 0) { |
1355 |
return ret;
|
1356 |
} |
1357 |
} |
1358 |
} |
1359 |
field++; |
1360 |
} |
1361 |
ret = vmstate_subsection_load(f, vmsd, opaque); |
1362 |
if (ret != 0) { |
1363 |
return ret;
|
1364 |
} |
1365 |
if (vmsd->post_load) {
|
1366 |
return vmsd->post_load(opaque, version_id);
|
1367 |
} |
1368 |
return 0; |
1369 |
} |
1370 |
|
1371 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1372 |
void *opaque)
|
1373 |
{ |
1374 |
VMStateField *field = vmsd->fields; |
1375 |
|
1376 |
if (vmsd->pre_save) {
|
1377 |
vmsd->pre_save(opaque); |
1378 |
} |
1379 |
while(field->name) {
|
1380 |
if (!field->field_exists ||
|
1381 |
field->field_exists(opaque, vmsd->version_id)) { |
1382 |
void *base_addr = opaque + field->offset;
|
1383 |
int i, n_elems = 1; |
1384 |
int size = field->size;
|
1385 |
|
1386 |
if (field->flags & VMS_VBUFFER) {
|
1387 |
size = *(int32_t *)(opaque+field->size_offset); |
1388 |
if (field->flags & VMS_MULTIPLY) {
|
1389 |
size *= field->size; |
1390 |
} |
1391 |
} |
1392 |
if (field->flags & VMS_ARRAY) {
|
1393 |
n_elems = field->num; |
1394 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1395 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1396 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1397 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1398 |
} |
1399 |
if (field->flags & VMS_POINTER) {
|
1400 |
base_addr = *(void **)base_addr + field->start;
|
1401 |
} |
1402 |
for (i = 0; i < n_elems; i++) { |
1403 |
void *addr = base_addr + size * i;
|
1404 |
|
1405 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1406 |
addr = *(void **)addr;
|
1407 |
} |
1408 |
if (field->flags & VMS_STRUCT) {
|
1409 |
vmstate_save_state(f, field->vmsd, addr); |
1410 |
} else {
|
1411 |
field->info->put(f, addr, size); |
1412 |
} |
1413 |
} |
1414 |
} |
1415 |
field++; |
1416 |
} |
1417 |
vmstate_subsection_save(f, vmsd, opaque); |
1418 |
} |
1419 |
|
1420 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1421 |
{ |
1422 |
if (!se->vmsd) { /* Old style */ |
1423 |
return se->load_state(f, se->opaque, version_id);
|
1424 |
} |
1425 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1426 |
} |
1427 |
|
1428 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1429 |
{ |
1430 |
if (!se->vmsd) { /* Old style */ |
1431 |
se->save_state(f, se->opaque); |
1432 |
return;
|
1433 |
} |
1434 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1435 |
} |
1436 |
|
1437 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1438 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1439 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1440 |
|
1441 |
#define QEMU_VM_EOF 0x00 |
1442 |
#define QEMU_VM_SECTION_START 0x01 |
1443 |
#define QEMU_VM_SECTION_PART 0x02 |
1444 |
#define QEMU_VM_SECTION_END 0x03 |
1445 |
#define QEMU_VM_SECTION_FULL 0x04 |
1446 |
#define QEMU_VM_SUBSECTION 0x05 |
1447 |
|
1448 |
bool qemu_savevm_state_blocked(Monitor *mon)
|
1449 |
{ |
1450 |
SaveStateEntry *se; |
1451 |
|
1452 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1453 |
if (se->no_migrate) {
|
1454 |
monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
|
1455 |
se->idstr); |
1456 |
return true; |
1457 |
} |
1458 |
} |
1459 |
return false; |
1460 |
} |
1461 |
|
1462 |
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable, |
1463 |
int shared)
|
1464 |
{ |
1465 |
SaveStateEntry *se; |
1466 |
|
1467 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1468 |
if(se->set_params == NULL) { |
1469 |
continue;
|
1470 |
} |
1471 |
se->set_params(blk_enable, shared, se->opaque); |
1472 |
} |
1473 |
|
1474 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1475 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1476 |
|
1477 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1478 |
int len;
|
1479 |
|
1480 |
if (se->save_live_state == NULL) |
1481 |
continue;
|
1482 |
|
1483 |
/* Section type */
|
1484 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1485 |
qemu_put_be32(f, se->section_id); |
1486 |
|
1487 |
/* ID string */
|
1488 |
len = strlen(se->idstr); |
1489 |
qemu_put_byte(f, len); |
1490 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1491 |
|
1492 |
qemu_put_be32(f, se->instance_id); |
1493 |
qemu_put_be32(f, se->version_id); |
1494 |
|
1495 |
se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque); |
1496 |
} |
1497 |
|
1498 |
if (qemu_file_has_error(f)) {
|
1499 |
qemu_savevm_state_cancel(mon, f); |
1500 |
return -EIO;
|
1501 |
} |
1502 |
|
1503 |
return 0; |
1504 |
} |
1505 |
|
1506 |
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
|
1507 |
{ |
1508 |
SaveStateEntry *se; |
1509 |
int ret = 1; |
1510 |
|
1511 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1512 |
if (se->save_live_state == NULL) |
1513 |
continue;
|
1514 |
|
1515 |
/* Section type */
|
1516 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1517 |
qemu_put_be32(f, se->section_id); |
1518 |
|
1519 |
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque); |
1520 |
if (!ret) {
|
1521 |
/* Do not proceed to the next vmstate before this one reported
|
1522 |
completion of the current stage. This serializes the migration
|
1523 |
and reduces the probability that a faster changing state is
|
1524 |
synchronized over and over again. */
|
1525 |
break;
|
1526 |
} |
1527 |
} |
1528 |
|
1529 |
if (ret)
|
1530 |
return 1; |
1531 |
|
1532 |
if (qemu_file_has_error(f)) {
|
1533 |
qemu_savevm_state_cancel(mon, f); |
1534 |
return -EIO;
|
1535 |
} |
1536 |
|
1537 |
return 0; |
1538 |
} |
1539 |
|
1540 |
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
|
1541 |
{ |
1542 |
SaveStateEntry *se; |
1543 |
|
1544 |
cpu_synchronize_all_states(); |
1545 |
|
1546 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1547 |
if (se->save_live_state == NULL) |
1548 |
continue;
|
1549 |
|
1550 |
/* Section type */
|
1551 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1552 |
qemu_put_be32(f, se->section_id); |
1553 |
|
1554 |
se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque); |
1555 |
} |
1556 |
|
1557 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1558 |
int len;
|
1559 |
|
1560 |
if (se->save_state == NULL && se->vmsd == NULL) |
1561 |
continue;
|
1562 |
|
1563 |
/* Section type */
|
1564 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1565 |
qemu_put_be32(f, se->section_id); |
1566 |
|
1567 |
/* ID string */
|
1568 |
len = strlen(se->idstr); |
1569 |
qemu_put_byte(f, len); |
1570 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1571 |
|
1572 |
qemu_put_be32(f, se->instance_id); |
1573 |
qemu_put_be32(f, se->version_id); |
1574 |
|
1575 |
vmstate_save(f, se); |
1576 |
} |
1577 |
|
1578 |
qemu_put_byte(f, QEMU_VM_EOF); |
1579 |
|
1580 |
if (qemu_file_has_error(f))
|
1581 |
return -EIO;
|
1582 |
|
1583 |
return 0; |
1584 |
} |
1585 |
|
1586 |
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
|
1587 |
{ |
1588 |
SaveStateEntry *se; |
1589 |
|
1590 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1591 |
if (se->save_live_state) {
|
1592 |
se->save_live_state(mon, f, -1, se->opaque);
|
1593 |
} |
1594 |
} |
1595 |
} |
1596 |
|
1597 |
static int qemu_savevm_state(Monitor *mon, QEMUFile *f) |
1598 |
{ |
1599 |
int saved_vm_running;
|
1600 |
int ret;
|
1601 |
|
1602 |
saved_vm_running = vm_running; |
1603 |
vm_stop(VMSTOP_SAVEVM); |
1604 |
|
1605 |
if (qemu_savevm_state_blocked(mon)) {
|
1606 |
ret = -EINVAL; |
1607 |
goto out;
|
1608 |
} |
1609 |
|
1610 |
ret = qemu_savevm_state_begin(mon, f, 0, 0); |
1611 |
if (ret < 0) |
1612 |
goto out;
|
1613 |
|
1614 |
do {
|
1615 |
ret = qemu_savevm_state_iterate(mon, f); |
1616 |
if (ret < 0) |
1617 |
goto out;
|
1618 |
} while (ret == 0); |
1619 |
|
1620 |
ret = qemu_savevm_state_complete(mon, f); |
1621 |
|
1622 |
out:
|
1623 |
if (qemu_file_has_error(f))
|
1624 |
ret = -EIO; |
1625 |
|
1626 |
if (!ret && saved_vm_running)
|
1627 |
vm_start(); |
1628 |
|
1629 |
return ret;
|
1630 |
} |
1631 |
|
1632 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1633 |
{ |
1634 |
SaveStateEntry *se; |
1635 |
|
1636 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1637 |
if (!strcmp(se->idstr, idstr) &&
|
1638 |
(instance_id == se->instance_id || |
1639 |
instance_id == se->alias_id)) |
1640 |
return se;
|
1641 |
/* Migrating from an older version? */
|
1642 |
if (strstr(se->idstr, idstr) && se->compat) {
|
1643 |
if (!strcmp(se->compat->idstr, idstr) &&
|
1644 |
(instance_id == se->compat->instance_id || |
1645 |
instance_id == se->alias_id)) |
1646 |
return se;
|
1647 |
} |
1648 |
} |
1649 |
return NULL; |
1650 |
} |
1651 |
|
1652 |
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1653 |
{ |
1654 |
while(sub && sub->needed) {
|
1655 |
if (strcmp(idstr, sub->vmsd->name) == 0) { |
1656 |
return sub->vmsd;
|
1657 |
} |
1658 |
sub++; |
1659 |
} |
1660 |
return NULL; |
1661 |
} |
1662 |
|
1663 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1664 |
void *opaque)
|
1665 |
{ |
1666 |
const VMStateSubsection *sub = vmsd->subsections;
|
1667 |
|
1668 |
if (!sub || !sub->needed) {
|
1669 |
return 0; |
1670 |
} |
1671 |
|
1672 |
while (qemu_peek_byte(f) == QEMU_VM_SUBSECTION) {
|
1673 |
char idstr[256]; |
1674 |
int ret;
|
1675 |
uint8_t version_id, len; |
1676 |
const VMStateDescription *sub_vmsd;
|
1677 |
|
1678 |
qemu_get_byte(f); /* subsection */
|
1679 |
len = qemu_get_byte(f); |
1680 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1681 |
idstr[len] = 0;
|
1682 |
version_id = qemu_get_be32(f); |
1683 |
|
1684 |
sub_vmsd = vmstate_get_subsection(sub, idstr); |
1685 |
if (sub_vmsd == NULL) { |
1686 |
return -ENOENT;
|
1687 |
} |
1688 |
assert(!sub_vmsd->subsections); |
1689 |
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1690 |
if (ret) {
|
1691 |
return ret;
|
1692 |
} |
1693 |
} |
1694 |
return 0; |
1695 |
} |
1696 |
|
1697 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1698 |
void *opaque)
|
1699 |
{ |
1700 |
const VMStateSubsection *sub = vmsd->subsections;
|
1701 |
|
1702 |
while (sub && sub->needed) {
|
1703 |
if (sub->needed(opaque)) {
|
1704 |
const VMStateDescription *vmsd = sub->vmsd;
|
1705 |
uint8_t len; |
1706 |
|
1707 |
qemu_put_byte(f, QEMU_VM_SUBSECTION); |
1708 |
len = strlen(vmsd->name); |
1709 |
qemu_put_byte(f, len); |
1710 |
qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
1711 |
qemu_put_be32(f, vmsd->version_id); |
1712 |
assert(!vmsd->subsections); |
1713 |
vmstate_save_state(f, vmsd, opaque); |
1714 |
} |
1715 |
sub++; |
1716 |
} |
1717 |
} |
1718 |
|
1719 |
typedef struct LoadStateEntry { |
1720 |
QLIST_ENTRY(LoadStateEntry) entry; |
1721 |
SaveStateEntry *se; |
1722 |
int section_id;
|
1723 |
int version_id;
|
1724 |
} LoadStateEntry; |
1725 |
|
1726 |
int qemu_loadvm_state(QEMUFile *f)
|
1727 |
{ |
1728 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1729 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1730 |
LoadStateEntry *le, *new_le; |
1731 |
uint8_t section_type; |
1732 |
unsigned int v; |
1733 |
int ret;
|
1734 |
|
1735 |
if (qemu_savevm_state_blocked(default_mon)) {
|
1736 |
return -EINVAL;
|
1737 |
} |
1738 |
|
1739 |
v = qemu_get_be32(f); |
1740 |
if (v != QEMU_VM_FILE_MAGIC)
|
1741 |
return -EINVAL;
|
1742 |
|
1743 |
v = qemu_get_be32(f); |
1744 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1745 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1746 |
return -ENOTSUP;
|
1747 |
} |
1748 |
if (v != QEMU_VM_FILE_VERSION)
|
1749 |
return -ENOTSUP;
|
1750 |
|
1751 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1752 |
uint32_t instance_id, version_id, section_id; |
1753 |
SaveStateEntry *se; |
1754 |
char idstr[257]; |
1755 |
int len;
|
1756 |
|
1757 |
switch (section_type) {
|
1758 |
case QEMU_VM_SECTION_START:
|
1759 |
case QEMU_VM_SECTION_FULL:
|
1760 |
/* Read section start */
|
1761 |
section_id = qemu_get_be32(f); |
1762 |
len = qemu_get_byte(f); |
1763 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1764 |
idstr[len] = 0;
|
1765 |
instance_id = qemu_get_be32(f); |
1766 |
version_id = qemu_get_be32(f); |
1767 |
|
1768 |
/* Find savevm section */
|
1769 |
se = find_se(idstr, instance_id); |
1770 |
if (se == NULL) { |
1771 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1772 |
ret = -EINVAL; |
1773 |
goto out;
|
1774 |
} |
1775 |
|
1776 |
/* Validate version */
|
1777 |
if (version_id > se->version_id) {
|
1778 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1779 |
version_id, idstr, se->version_id); |
1780 |
ret = -EINVAL; |
1781 |
goto out;
|
1782 |
} |
1783 |
|
1784 |
/* Add entry */
|
1785 |
le = qemu_mallocz(sizeof(*le));
|
1786 |
|
1787 |
le->se = se; |
1788 |
le->section_id = section_id; |
1789 |
le->version_id = version_id; |
1790 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1791 |
|
1792 |
ret = vmstate_load(f, le->se, le->version_id); |
1793 |
if (ret < 0) { |
1794 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1795 |
instance_id, idstr); |
1796 |
goto out;
|
1797 |
} |
1798 |
break;
|
1799 |
case QEMU_VM_SECTION_PART:
|
1800 |
case QEMU_VM_SECTION_END:
|
1801 |
section_id = qemu_get_be32(f); |
1802 |
|
1803 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1804 |
if (le->section_id == section_id) {
|
1805 |
break;
|
1806 |
} |
1807 |
} |
1808 |
if (le == NULL) { |
1809 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1810 |
ret = -EINVAL; |
1811 |
goto out;
|
1812 |
} |
1813 |
|
1814 |
ret = vmstate_load(f, le->se, le->version_id); |
1815 |
if (ret < 0) { |
1816 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1817 |
section_id); |
1818 |
goto out;
|
1819 |
} |
1820 |
break;
|
1821 |
default:
|
1822 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1823 |
ret = -EINVAL; |
1824 |
goto out;
|
1825 |
} |
1826 |
} |
1827 |
|
1828 |
cpu_synchronize_all_post_init(); |
1829 |
|
1830 |
ret = 0;
|
1831 |
|
1832 |
out:
|
1833 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1834 |
QLIST_REMOVE(le, entry); |
1835 |
qemu_free(le); |
1836 |
} |
1837 |
|
1838 |
if (qemu_file_has_error(f))
|
1839 |
ret = -EIO; |
1840 |
|
1841 |
return ret;
|
1842 |
} |
1843 |
|
1844 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1845 |
const char *name) |
1846 |
{ |
1847 |
QEMUSnapshotInfo *sn_tab, *sn; |
1848 |
int nb_sns, i, ret;
|
1849 |
|
1850 |
ret = -ENOENT; |
1851 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1852 |
if (nb_sns < 0) |
1853 |
return ret;
|
1854 |
for(i = 0; i < nb_sns; i++) { |
1855 |
sn = &sn_tab[i]; |
1856 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1857 |
*sn_info = *sn; |
1858 |
ret = 0;
|
1859 |
break;
|
1860 |
} |
1861 |
} |
1862 |
qemu_free(sn_tab); |
1863 |
return ret;
|
1864 |
} |
1865 |
|
1866 |
/*
|
1867 |
* Deletes snapshots of a given name in all opened images.
|
1868 |
*/
|
1869 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
1870 |
{ |
1871 |
BlockDriverState *bs; |
1872 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
1873 |
int ret;
|
1874 |
|
1875 |
bs = NULL;
|
1876 |
while ((bs = bdrv_next(bs))) {
|
1877 |
if (bdrv_can_snapshot(bs) &&
|
1878 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
1879 |
{ |
1880 |
ret = bdrv_snapshot_delete(bs, name); |
1881 |
if (ret < 0) { |
1882 |
monitor_printf(mon, |
1883 |
"Error while deleting snapshot on '%s'\n",
|
1884 |
bdrv_get_device_name(bs)); |
1885 |
return -1; |
1886 |
} |
1887 |
} |
1888 |
} |
1889 |
|
1890 |
return 0; |
1891 |
} |
1892 |
|
1893 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1894 |
{ |
1895 |
BlockDriverState *bs, *bs1; |
1896 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1897 |
int ret;
|
1898 |
QEMUFile *f; |
1899 |
int saved_vm_running;
|
1900 |
uint32_t vm_state_size; |
1901 |
#ifdef _WIN32
|
1902 |
struct _timeb tb;
|
1903 |
struct tm *ptm;
|
1904 |
#else
|
1905 |
struct timeval tv;
|
1906 |
struct tm tm;
|
1907 |
#endif
|
1908 |
const char *name = qdict_get_try_str(qdict, "name"); |
1909 |
|
1910 |
/* Verify if there is a device that doesn't support snapshots and is writable */
|
1911 |
bs = NULL;
|
1912 |
while ((bs = bdrv_next(bs))) {
|
1913 |
|
1914 |
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
|
1915 |
continue;
|
1916 |
} |
1917 |
|
1918 |
if (!bdrv_can_snapshot(bs)) {
|
1919 |
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
1920 |
bdrv_get_device_name(bs)); |
1921 |
return;
|
1922 |
} |
1923 |
} |
1924 |
|
1925 |
bs = bdrv_snapshots(); |
1926 |
if (!bs) {
|
1927 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1928 |
return;
|
1929 |
} |
1930 |
|
1931 |
saved_vm_running = vm_running; |
1932 |
vm_stop(VMSTOP_SAVEVM); |
1933 |
|
1934 |
memset(sn, 0, sizeof(*sn)); |
1935 |
|
1936 |
/* fill auxiliary fields */
|
1937 |
#ifdef _WIN32
|
1938 |
_ftime(&tb); |
1939 |
sn->date_sec = tb.time; |
1940 |
sn->date_nsec = tb.millitm * 1000000;
|
1941 |
#else
|
1942 |
gettimeofday(&tv, NULL);
|
1943 |
sn->date_sec = tv.tv_sec; |
1944 |
sn->date_nsec = tv.tv_usec * 1000;
|
1945 |
#endif
|
1946 |
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
1947 |
|
1948 |
if (name) {
|
1949 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1950 |
if (ret >= 0) { |
1951 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1952 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1953 |
} else {
|
1954 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1955 |
} |
1956 |
} else {
|
1957 |
#ifdef _WIN32
|
1958 |
ptm = localtime(&tb.time); |
1959 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
1960 |
#else
|
1961 |
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
1962 |
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
1963 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
1964 |
#endif
|
1965 |
} |
1966 |
|
1967 |
/* Delete old snapshots of the same name */
|
1968 |
if (name && del_existing_snapshots(mon, name) < 0) { |
1969 |
goto the_end;
|
1970 |
} |
1971 |
|
1972 |
/* save the VM state */
|
1973 |
f = qemu_fopen_bdrv(bs, 1);
|
1974 |
if (!f) {
|
1975 |
monitor_printf(mon, "Could not open VM state file\n");
|
1976 |
goto the_end;
|
1977 |
} |
1978 |
ret = qemu_savevm_state(mon, f); |
1979 |
vm_state_size = qemu_ftell(f); |
1980 |
qemu_fclose(f); |
1981 |
if (ret < 0) { |
1982 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1983 |
goto the_end;
|
1984 |
} |
1985 |
|
1986 |
/* create the snapshots */
|
1987 |
|
1988 |
bs1 = NULL;
|
1989 |
while ((bs1 = bdrv_next(bs1))) {
|
1990 |
if (bdrv_can_snapshot(bs1)) {
|
1991 |
/* Write VM state size only to the image that contains the state */
|
1992 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1993 |
ret = bdrv_snapshot_create(bs1, sn); |
1994 |
if (ret < 0) { |
1995 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1996 |
bdrv_get_device_name(bs1)); |
1997 |
} |
1998 |
} |
1999 |
} |
2000 |
|
2001 |
the_end:
|
2002 |
if (saved_vm_running)
|
2003 |
vm_start(); |
2004 |
} |
2005 |
|
2006 |
int load_vmstate(const char *name) |
2007 |
{ |
2008 |
BlockDriverState *bs, *bs_vm_state; |
2009 |
QEMUSnapshotInfo sn; |
2010 |
QEMUFile *f; |
2011 |
int ret;
|
2012 |
|
2013 |
bs_vm_state = bdrv_snapshots(); |
2014 |
if (!bs_vm_state) {
|
2015 |
error_report("No block device supports snapshots");
|
2016 |
return -ENOTSUP;
|
2017 |
} |
2018 |
|
2019 |
/* Don't even try to load empty VM states */
|
2020 |
ret = bdrv_snapshot_find(bs_vm_state, &sn, name); |
2021 |
if (ret < 0) { |
2022 |
return ret;
|
2023 |
} else if (sn.vm_state_size == 0) { |
2024 |
return -EINVAL;
|
2025 |
} |
2026 |
|
2027 |
/* Verify if there is any device that doesn't support snapshots and is
|
2028 |
writable and check if the requested snapshot is available too. */
|
2029 |
bs = NULL;
|
2030 |
while ((bs = bdrv_next(bs))) {
|
2031 |
|
2032 |
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
|
2033 |
continue;
|
2034 |
} |
2035 |
|
2036 |
if (!bdrv_can_snapshot(bs)) {
|
2037 |
error_report("Device '%s' is writable but does not support snapshots.",
|
2038 |
bdrv_get_device_name(bs)); |
2039 |
return -ENOTSUP;
|
2040 |
} |
2041 |
|
2042 |
ret = bdrv_snapshot_find(bs, &sn, name); |
2043 |
if (ret < 0) { |
2044 |
error_report("Device '%s' does not have the requested snapshot '%s'",
|
2045 |
bdrv_get_device_name(bs), name); |
2046 |
return ret;
|
2047 |
} |
2048 |
} |
2049 |
|
2050 |
/* Flush all IO requests so they don't interfere with the new state. */
|
2051 |
qemu_aio_flush(); |
2052 |
|
2053 |
bs = NULL;
|
2054 |
while ((bs = bdrv_next(bs))) {
|
2055 |
if (bdrv_can_snapshot(bs)) {
|
2056 |
ret = bdrv_snapshot_goto(bs, name); |
2057 |
if (ret < 0) { |
2058 |
error_report("Error %d while activating snapshot '%s' on '%s'",
|
2059 |
ret, name, bdrv_get_device_name(bs)); |
2060 |
return ret;
|
2061 |
} |
2062 |
} |
2063 |
} |
2064 |
|
2065 |
/* restore the VM state */
|
2066 |
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
2067 |
if (!f) {
|
2068 |
error_report("Could not open VM state file");
|
2069 |
return -EINVAL;
|
2070 |
} |
2071 |
|
2072 |
ret = qemu_loadvm_state(f); |
2073 |
|
2074 |
qemu_fclose(f); |
2075 |
if (ret < 0) { |
2076 |
error_report("Error %d while loading VM state", ret);
|
2077 |
return ret;
|
2078 |
} |
2079 |
|
2080 |
return 0; |
2081 |
} |
2082 |
|
2083 |
void do_delvm(Monitor *mon, const QDict *qdict) |
2084 |
{ |
2085 |
BlockDriverState *bs, *bs1; |
2086 |
int ret;
|
2087 |
const char *name = qdict_get_str(qdict, "name"); |
2088 |
|
2089 |
bs = bdrv_snapshots(); |
2090 |
if (!bs) {
|
2091 |
monitor_printf(mon, "No block device supports snapshots\n");
|
2092 |
return;
|
2093 |
} |
2094 |
|
2095 |
bs1 = NULL;
|
2096 |
while ((bs1 = bdrv_next(bs1))) {
|
2097 |
if (bdrv_can_snapshot(bs1)) {
|
2098 |
ret = bdrv_snapshot_delete(bs1, name); |
2099 |
if (ret < 0) { |
2100 |
if (ret == -ENOTSUP)
|
2101 |
monitor_printf(mon, |
2102 |
"Snapshots not supported on device '%s'\n",
|
2103 |
bdrv_get_device_name(bs1)); |
2104 |
else
|
2105 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
2106 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
2107 |
} |
2108 |
} |
2109 |
} |
2110 |
} |
2111 |
|
2112 |
void do_info_snapshots(Monitor *mon)
|
2113 |
{ |
2114 |
BlockDriverState *bs, *bs1; |
2115 |
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2116 |
int nb_sns, i, ret, available;
|
2117 |
int total;
|
2118 |
int *available_snapshots;
|
2119 |
char buf[256]; |
2120 |
|
2121 |
bs = bdrv_snapshots(); |
2122 |
if (!bs) {
|
2123 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
2124 |
return;
|
2125 |
} |
2126 |
|
2127 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
2128 |
if (nb_sns < 0) { |
2129 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
2130 |
return;
|
2131 |
} |
2132 |
|
2133 |
if (nb_sns == 0) { |
2134 |
monitor_printf(mon, "There is no snapshot available.\n");
|
2135 |
return;
|
2136 |
} |
2137 |
|
2138 |
available_snapshots = qemu_mallocz(sizeof(int) * nb_sns); |
2139 |
total = 0;
|
2140 |
for (i = 0; i < nb_sns; i++) { |
2141 |
sn = &sn_tab[i]; |
2142 |
available = 1;
|
2143 |
bs1 = NULL;
|
2144 |
|
2145 |
while ((bs1 = bdrv_next(bs1))) {
|
2146 |
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
2147 |
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); |
2148 |
if (ret < 0) { |
2149 |
available = 0;
|
2150 |
break;
|
2151 |
} |
2152 |
} |
2153 |
} |
2154 |
|
2155 |
if (available) {
|
2156 |
available_snapshots[total] = i; |
2157 |
total++; |
2158 |
} |
2159 |
} |
2160 |
|
2161 |
if (total > 0) { |
2162 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
2163 |
for (i = 0; i < total; i++) { |
2164 |
sn = &sn_tab[available_snapshots[i]]; |
2165 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
2166 |
} |
2167 |
} else {
|
2168 |
monitor_printf(mon, "There is no suitable snapshot available\n");
|
2169 |
} |
2170 |
|
2171 |
qemu_free(sn_tab); |
2172 |
qemu_free(available_snapshots); |
2173 |
|
2174 |
} |