root / savevm.c @ 41bd13af
History | View | Annotate | Download (31.4 kB)
| 1 |
/*
|
|---|---|
| 2 |
* QEMU System Emulator
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003-2008 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
| 7 |
* of this software and associated documentation files (the "Software"), to deal
|
| 8 |
* in the Software without restriction, including without limitation the rights
|
| 9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
| 10 |
* copies of the Software, and to permit persons to whom the Software is
|
| 11 |
* furnished to do so, subject to the following conditions:
|
| 12 |
*
|
| 13 |
* The above copyright notice and this permission notice shall be included in
|
| 14 |
* all copies or substantial portions of the Software.
|
| 15 |
*
|
| 16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
| 17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
| 18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
| 19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
| 20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
| 21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
| 22 |
* THE SOFTWARE.
|
| 23 |
*/
|
| 24 |
#include <unistd.h> |
| 25 |
#include <fcntl.h> |
| 26 |
#include <signal.h> |
| 27 |
#include <time.h> |
| 28 |
#include <errno.h> |
| 29 |
#include <sys/time.h> |
| 30 |
#include <zlib.h> |
| 31 |
|
| 32 |
/* Needed early for HOST_BSD etc. */
|
| 33 |
#include "config-host.h" |
| 34 |
|
| 35 |
#ifndef _WIN32
|
| 36 |
#include <sys/times.h> |
| 37 |
#include <sys/wait.h> |
| 38 |
#include <termios.h> |
| 39 |
#include <sys/mman.h> |
| 40 |
#include <sys/ioctl.h> |
| 41 |
#include <sys/resource.h> |
| 42 |
#include <sys/socket.h> |
| 43 |
#include <netinet/in.h> |
| 44 |
#include <net/if.h> |
| 45 |
#if defined(__NetBSD__)
|
| 46 |
#include <net/if_tap.h> |
| 47 |
#endif
|
| 48 |
#ifdef __linux__
|
| 49 |
#include <linux/if_tun.h> |
| 50 |
#endif
|
| 51 |
#include <arpa/inet.h> |
| 52 |
#include <dirent.h> |
| 53 |
#include <netdb.h> |
| 54 |
#include <sys/select.h> |
| 55 |
#ifdef HOST_BSD
|
| 56 |
#include <sys/stat.h> |
| 57 |
#if defined(__FreeBSD__) || defined(__DragonFly__)
|
| 58 |
#include <libutil.h> |
| 59 |
#else
|
| 60 |
#include <util.h> |
| 61 |
#endif
|
| 62 |
#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
|
| 63 |
#include <freebsd/stdlib.h> |
| 64 |
#else
|
| 65 |
#ifdef __linux__
|
| 66 |
#include <pty.h> |
| 67 |
#include <malloc.h> |
| 68 |
#include <linux/rtc.h> |
| 69 |
#endif
|
| 70 |
#endif
|
| 71 |
#endif
|
| 72 |
|
| 73 |
#ifdef _WIN32
|
| 74 |
#include <windows.h> |
| 75 |
#include <malloc.h> |
| 76 |
#include <sys/timeb.h> |
| 77 |
#include <mmsystem.h> |
| 78 |
#define getopt_long_only getopt_long
|
| 79 |
#define memalign(align, size) malloc(size)
|
| 80 |
#endif
|
| 81 |
|
| 82 |
#include "qemu-common.h" |
| 83 |
#include "hw/hw.h" |
| 84 |
#include "net.h" |
| 85 |
#include "monitor.h" |
| 86 |
#include "sysemu.h" |
| 87 |
#include "qemu-timer.h" |
| 88 |
#include "qemu-char.h" |
| 89 |
#include "block.h" |
| 90 |
#include "audio/audio.h" |
| 91 |
#include "migration.h" |
| 92 |
#include "qemu_socket.h" |
| 93 |
|
| 94 |
/* point to the block driver where the snapshots are managed */
|
| 95 |
static BlockDriverState *bs_snapshots;
|
| 96 |
|
| 97 |
#define SELF_ANNOUNCE_ROUNDS 5 |
| 98 |
#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
| 99 |
//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
|
| 100 |
#define EXPERIMENTAL_MAGIC 0xf1f23f4f |
| 101 |
|
| 102 |
static int announce_self_create(uint8_t *buf, |
| 103 |
uint8_t *mac_addr) |
| 104 |
{
|
| 105 |
uint32_t magic = EXPERIMENTAL_MAGIC; |
| 106 |
uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
| 107 |
|
| 108 |
/* FIXME: should we send a different packet (arp/rarp/ping)? */
|
| 109 |
|
| 110 |
memset(buf, 0xff, 6); /* h_dst */ |
| 111 |
memcpy(buf + 6, mac_addr, 6); /* h_src */ |
| 112 |
memcpy(buf + 12, &proto, 2); /* h_proto */ |
| 113 |
memcpy(buf + 14, &magic, 4); /* magic */ |
| 114 |
|
| 115 |
return 18; /* len */ |
| 116 |
} |
| 117 |
|
| 118 |
void qemu_announce_self(void) |
| 119 |
{
|
| 120 |
int i, j, len;
|
| 121 |
VLANState *vlan; |
| 122 |
VLANClientState *vc; |
| 123 |
uint8_t buf[256];
|
| 124 |
|
| 125 |
for (i = 0; i < MAX_NICS; i++) { |
| 126 |
if (!nd_table[i].used)
|
| 127 |
continue;
|
| 128 |
len = announce_self_create(buf, nd_table[i].macaddr); |
| 129 |
vlan = nd_table[i].vlan; |
| 130 |
for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
| 131 |
for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++) |
| 132 |
vc->fd_read(vc->opaque, buf, len); |
| 133 |
} |
| 134 |
} |
| 135 |
} |
| 136 |
|
| 137 |
/***********************************************************/
|
| 138 |
/* savevm/loadvm support */
|
| 139 |
|
| 140 |
#define IO_BUF_SIZE 32768 |
| 141 |
|
| 142 |
struct QEMUFile {
|
| 143 |
QEMUFilePutBufferFunc *put_buffer; |
| 144 |
QEMUFileGetBufferFunc *get_buffer; |
| 145 |
QEMUFileCloseFunc *close; |
| 146 |
QEMUFileRateLimit *rate_limit; |
| 147 |
void *opaque;
|
| 148 |
int is_write;
|
| 149 |
|
| 150 |
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
| 151 |
when reading */
|
| 152 |
int buf_index;
|
| 153 |
int buf_size; /* 0 when writing */ |
| 154 |
uint8_t buf[IO_BUF_SIZE]; |
| 155 |
|
| 156 |
int has_error;
|
| 157 |
}; |
| 158 |
|
| 159 |
typedef struct QEMUFilePopen |
| 160 |
{
|
| 161 |
FILE *popen_file; |
| 162 |
QEMUFile *file; |
| 163 |
} QEMUFilePopen; |
| 164 |
|
| 165 |
typedef struct QEMUFileSocket |
| 166 |
{
|
| 167 |
int fd;
|
| 168 |
QEMUFile *file; |
| 169 |
} QEMUFileSocket; |
| 170 |
|
| 171 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 172 |
{
|
| 173 |
QEMUFileSocket *s = opaque; |
| 174 |
ssize_t len; |
| 175 |
|
| 176 |
do {
|
| 177 |
len = recv(s->fd, buf, size, 0);
|
| 178 |
} while (len == -1 && socket_error() == EINTR); |
| 179 |
|
| 180 |
if (len == -1) |
| 181 |
len = -socket_error(); |
| 182 |
|
| 183 |
return len;
|
| 184 |
} |
| 185 |
|
| 186 |
static int socket_close(void *opaque) |
| 187 |
{
|
| 188 |
QEMUFileSocket *s = opaque; |
| 189 |
qemu_free(s); |
| 190 |
return 0; |
| 191 |
} |
| 192 |
|
| 193 |
static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
| 194 |
{
|
| 195 |
QEMUFilePopen *s = opaque; |
| 196 |
return fwrite(buf, 1, size, s->popen_file); |
| 197 |
} |
| 198 |
|
| 199 |
static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 200 |
{
|
| 201 |
QEMUFilePopen *s = opaque; |
| 202 |
return fread(buf, 1, size, s->popen_file); |
| 203 |
} |
| 204 |
|
| 205 |
static int popen_close(void *opaque) |
| 206 |
{
|
| 207 |
QEMUFilePopen *s = opaque; |
| 208 |
pclose(s->popen_file); |
| 209 |
qemu_free(s); |
| 210 |
return 0; |
| 211 |
} |
| 212 |
|
| 213 |
QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
| 214 |
{
|
| 215 |
QEMUFilePopen *s; |
| 216 |
|
| 217 |
if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 218 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
| 219 |
return NULL; |
| 220 |
} |
| 221 |
|
| 222 |
s = qemu_mallocz(sizeof(QEMUFilePopen));
|
| 223 |
|
| 224 |
s->popen_file = popen_file; |
| 225 |
|
| 226 |
if(mode[0] == 'r') { |
| 227 |
s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL); |
| 228 |
} else {
|
| 229 |
s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL); |
| 230 |
} |
| 231 |
fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
|
| 232 |
return s->file;
|
| 233 |
} |
| 234 |
|
| 235 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 236 |
{
|
| 237 |
FILE *popen_file; |
| 238 |
|
| 239 |
popen_file = popen(command, mode); |
| 240 |
if(popen_file == NULL) { |
| 241 |
return NULL; |
| 242 |
} |
| 243 |
|
| 244 |
return qemu_popen(popen_file, mode);
|
| 245 |
} |
| 246 |
|
| 247 |
QEMUFile *qemu_fopen_socket(int fd)
|
| 248 |
{
|
| 249 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
| 250 |
|
| 251 |
s->fd = fd; |
| 252 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL); |
| 253 |
return s->file;
|
| 254 |
} |
| 255 |
|
| 256 |
typedef struct QEMUFileStdio |
| 257 |
{
|
| 258 |
FILE *outfile; |
| 259 |
} QEMUFileStdio; |
| 260 |
|
| 261 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 262 |
int64_t pos, int size)
|
| 263 |
{
|
| 264 |
QEMUFileStdio *s = opaque; |
| 265 |
fseek(s->outfile, pos, SEEK_SET); |
| 266 |
fwrite(buf, 1, size, s->outfile);
|
| 267 |
return size;
|
| 268 |
} |
| 269 |
|
| 270 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 271 |
{
|
| 272 |
QEMUFileStdio *s = opaque; |
| 273 |
fseek(s->outfile, pos, SEEK_SET); |
| 274 |
return fread(buf, 1, size, s->outfile); |
| 275 |
} |
| 276 |
|
| 277 |
static int file_close(void *opaque) |
| 278 |
{
|
| 279 |
QEMUFileStdio *s = opaque; |
| 280 |
fclose(s->outfile); |
| 281 |
qemu_free(s); |
| 282 |
return 0; |
| 283 |
} |
| 284 |
|
| 285 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 286 |
{
|
| 287 |
QEMUFileStdio *s; |
| 288 |
|
| 289 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
| 290 |
|
| 291 |
s->outfile = fopen(filename, mode); |
| 292 |
if (!s->outfile)
|
| 293 |
goto fail;
|
| 294 |
|
| 295 |
if (!strcmp(mode, "wb")) |
| 296 |
return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL); |
| 297 |
else if (!strcmp(mode, "rb")) |
| 298 |
return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL); |
| 299 |
|
| 300 |
fail:
|
| 301 |
if (s->outfile)
|
| 302 |
fclose(s->outfile); |
| 303 |
qemu_free(s); |
| 304 |
return NULL; |
| 305 |
} |
| 306 |
|
| 307 |
typedef struct QEMUFileBdrv |
| 308 |
{
|
| 309 |
BlockDriverState *bs; |
| 310 |
int64_t base_offset; |
| 311 |
} QEMUFileBdrv; |
| 312 |
|
| 313 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
| 314 |
int64_t pos, int size)
|
| 315 |
{
|
| 316 |
QEMUFileBdrv *s = opaque; |
| 317 |
bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size); |
| 318 |
return size;
|
| 319 |
} |
| 320 |
|
| 321 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 322 |
{
|
| 323 |
QEMUFileBdrv *s = opaque; |
| 324 |
return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
|
| 325 |
} |
| 326 |
|
| 327 |
static int bdrv_fclose(void *opaque) |
| 328 |
{
|
| 329 |
QEMUFileBdrv *s = opaque; |
| 330 |
qemu_free(s); |
| 331 |
return 0; |
| 332 |
} |
| 333 |
|
| 334 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
| 335 |
{
|
| 336 |
QEMUFileBdrv *s; |
| 337 |
|
| 338 |
s = qemu_mallocz(sizeof(QEMUFileBdrv));
|
| 339 |
|
| 340 |
s->bs = bs; |
| 341 |
s->base_offset = offset; |
| 342 |
|
| 343 |
if (is_writable)
|
| 344 |
return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL); |
| 345 |
|
| 346 |
return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL); |
| 347 |
} |
| 348 |
|
| 349 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
| 350 |
QEMUFileGetBufferFunc *get_buffer, |
| 351 |
QEMUFileCloseFunc *close, |
| 352 |
QEMUFileRateLimit *rate_limit) |
| 353 |
{
|
| 354 |
QEMUFile *f; |
| 355 |
|
| 356 |
f = qemu_mallocz(sizeof(QEMUFile));
|
| 357 |
|
| 358 |
f->opaque = opaque; |
| 359 |
f->put_buffer = put_buffer; |
| 360 |
f->get_buffer = get_buffer; |
| 361 |
f->close = close; |
| 362 |
f->rate_limit = rate_limit; |
| 363 |
f->is_write = 0;
|
| 364 |
|
| 365 |
return f;
|
| 366 |
} |
| 367 |
|
| 368 |
int qemu_file_has_error(QEMUFile *f)
|
| 369 |
{
|
| 370 |
return f->has_error;
|
| 371 |
} |
| 372 |
|
| 373 |
void qemu_file_set_error(QEMUFile *f)
|
| 374 |
{
|
| 375 |
f->has_error = 1;
|
| 376 |
} |
| 377 |
|
| 378 |
void qemu_fflush(QEMUFile *f)
|
| 379 |
{
|
| 380 |
if (!f->put_buffer)
|
| 381 |
return;
|
| 382 |
|
| 383 |
if (f->is_write && f->buf_index > 0) { |
| 384 |
int len;
|
| 385 |
|
| 386 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 387 |
if (len > 0) |
| 388 |
f->buf_offset += f->buf_index; |
| 389 |
else
|
| 390 |
f->has_error = 1;
|
| 391 |
f->buf_index = 0;
|
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
static void qemu_fill_buffer(QEMUFile *f) |
| 396 |
{
|
| 397 |
int len;
|
| 398 |
|
| 399 |
if (!f->get_buffer)
|
| 400 |
return;
|
| 401 |
|
| 402 |
if (f->is_write)
|
| 403 |
abort(); |
| 404 |
|
| 405 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 406 |
if (len > 0) { |
| 407 |
f->buf_index = 0;
|
| 408 |
f->buf_size = len; |
| 409 |
f->buf_offset += len; |
| 410 |
} else if (len != -EAGAIN) |
| 411 |
f->has_error = 1;
|
| 412 |
} |
| 413 |
|
| 414 |
int qemu_fclose(QEMUFile *f)
|
| 415 |
{
|
| 416 |
int ret = 0; |
| 417 |
qemu_fflush(f); |
| 418 |
if (f->close)
|
| 419 |
ret = f->close(f->opaque); |
| 420 |
qemu_free(f); |
| 421 |
return ret;
|
| 422 |
} |
| 423 |
|
| 424 |
void qemu_file_put_notify(QEMUFile *f)
|
| 425 |
{
|
| 426 |
f->put_buffer(f->opaque, NULL, 0, 0); |
| 427 |
} |
| 428 |
|
| 429 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 430 |
{
|
| 431 |
int l;
|
| 432 |
|
| 433 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 434 |
fprintf(stderr, |
| 435 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 436 |
abort(); |
| 437 |
} |
| 438 |
|
| 439 |
while (!f->has_error && size > 0) { |
| 440 |
l = IO_BUF_SIZE - f->buf_index; |
| 441 |
if (l > size)
|
| 442 |
l = size; |
| 443 |
memcpy(f->buf + f->buf_index, buf, l); |
| 444 |
f->is_write = 1;
|
| 445 |
f->buf_index += l; |
| 446 |
buf += l; |
| 447 |
size -= l; |
| 448 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 449 |
qemu_fflush(f); |
| 450 |
} |
| 451 |
} |
| 452 |
|
| 453 |
void qemu_put_byte(QEMUFile *f, int v) |
| 454 |
{
|
| 455 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 456 |
fprintf(stderr, |
| 457 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 458 |
abort(); |
| 459 |
} |
| 460 |
|
| 461 |
f->buf[f->buf_index++] = v; |
| 462 |
f->is_write = 1;
|
| 463 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 464 |
qemu_fflush(f); |
| 465 |
} |
| 466 |
|
| 467 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 468 |
{
|
| 469 |
int size, l;
|
| 470 |
|
| 471 |
if (f->is_write)
|
| 472 |
abort(); |
| 473 |
|
| 474 |
size = size1; |
| 475 |
while (size > 0) { |
| 476 |
l = f->buf_size - f->buf_index; |
| 477 |
if (l == 0) { |
| 478 |
qemu_fill_buffer(f); |
| 479 |
l = f->buf_size - f->buf_index; |
| 480 |
if (l == 0) |
| 481 |
break;
|
| 482 |
} |
| 483 |
if (l > size)
|
| 484 |
l = size; |
| 485 |
memcpy(buf, f->buf + f->buf_index, l); |
| 486 |
f->buf_index += l; |
| 487 |
buf += l; |
| 488 |
size -= l; |
| 489 |
} |
| 490 |
return size1 - size;
|
| 491 |
} |
| 492 |
|
| 493 |
int qemu_get_byte(QEMUFile *f)
|
| 494 |
{
|
| 495 |
if (f->is_write)
|
| 496 |
abort(); |
| 497 |
|
| 498 |
if (f->buf_index >= f->buf_size) {
|
| 499 |
qemu_fill_buffer(f); |
| 500 |
if (f->buf_index >= f->buf_size)
|
| 501 |
return 0; |
| 502 |
} |
| 503 |
return f->buf[f->buf_index++];
|
| 504 |
} |
| 505 |
|
| 506 |
int64_t qemu_ftell(QEMUFile *f) |
| 507 |
{
|
| 508 |
return f->buf_offset - f->buf_size + f->buf_index;
|
| 509 |
} |
| 510 |
|
| 511 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
| 512 |
{
|
| 513 |
if (whence == SEEK_SET) {
|
| 514 |
/* nothing to do */
|
| 515 |
} else if (whence == SEEK_CUR) { |
| 516 |
pos += qemu_ftell(f); |
| 517 |
} else {
|
| 518 |
/* SEEK_END not supported */
|
| 519 |
return -1; |
| 520 |
} |
| 521 |
if (f->put_buffer) {
|
| 522 |
qemu_fflush(f); |
| 523 |
f->buf_offset = pos; |
| 524 |
} else {
|
| 525 |
f->buf_offset = pos; |
| 526 |
f->buf_index = 0;
|
| 527 |
f->buf_size = 0;
|
| 528 |
} |
| 529 |
return pos;
|
| 530 |
} |
| 531 |
|
| 532 |
int qemu_file_rate_limit(QEMUFile *f)
|
| 533 |
{
|
| 534 |
if (f->rate_limit)
|
| 535 |
return f->rate_limit(f->opaque);
|
| 536 |
|
| 537 |
return 0; |
| 538 |
} |
| 539 |
|
| 540 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 541 |
{
|
| 542 |
qemu_put_byte(f, v >> 8);
|
| 543 |
qemu_put_byte(f, v); |
| 544 |
} |
| 545 |
|
| 546 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 547 |
{
|
| 548 |
qemu_put_byte(f, v >> 24);
|
| 549 |
qemu_put_byte(f, v >> 16);
|
| 550 |
qemu_put_byte(f, v >> 8);
|
| 551 |
qemu_put_byte(f, v); |
| 552 |
} |
| 553 |
|
| 554 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
| 555 |
{
|
| 556 |
qemu_put_be32(f, v >> 32);
|
| 557 |
qemu_put_be32(f, v); |
| 558 |
} |
| 559 |
|
| 560 |
unsigned int qemu_get_be16(QEMUFile *f) |
| 561 |
{
|
| 562 |
unsigned int v; |
| 563 |
v = qemu_get_byte(f) << 8;
|
| 564 |
v |= qemu_get_byte(f); |
| 565 |
return v;
|
| 566 |
} |
| 567 |
|
| 568 |
unsigned int qemu_get_be32(QEMUFile *f) |
| 569 |
{
|
| 570 |
unsigned int v; |
| 571 |
v = qemu_get_byte(f) << 24;
|
| 572 |
v |= qemu_get_byte(f) << 16;
|
| 573 |
v |= qemu_get_byte(f) << 8;
|
| 574 |
v |= qemu_get_byte(f); |
| 575 |
return v;
|
| 576 |
} |
| 577 |
|
| 578 |
uint64_t qemu_get_be64(QEMUFile *f) |
| 579 |
{
|
| 580 |
uint64_t v; |
| 581 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
| 582 |
v |= qemu_get_be32(f); |
| 583 |
return v;
|
| 584 |
} |
| 585 |
|
| 586 |
typedef struct SaveStateEntry { |
| 587 |
char idstr[256]; |
| 588 |
int instance_id;
|
| 589 |
int version_id;
|
| 590 |
int section_id;
|
| 591 |
SaveLiveStateHandler *save_live_state; |
| 592 |
SaveStateHandler *save_state; |
| 593 |
LoadStateHandler *load_state; |
| 594 |
void *opaque;
|
| 595 |
struct SaveStateEntry *next;
|
| 596 |
} SaveStateEntry; |
| 597 |
|
| 598 |
static SaveStateEntry *first_se;
|
| 599 |
|
| 600 |
/* TODO: Individual devices generally have very little idea about the rest
|
| 601 |
of the system, so instance_id should be removed/replaced.
|
| 602 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
| 603 |
distinguishing id for all instances of your device class. */
|
| 604 |
int register_savevm_live(const char *idstr, |
| 605 |
int instance_id,
|
| 606 |
int version_id,
|
| 607 |
SaveLiveStateHandler *save_live_state, |
| 608 |
SaveStateHandler *save_state, |
| 609 |
LoadStateHandler *load_state, |
| 610 |
void *opaque)
|
| 611 |
{
|
| 612 |
SaveStateEntry *se, **pse; |
| 613 |
static int global_section_id; |
| 614 |
|
| 615 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
| 616 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
| 617 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
| 618 |
se->version_id = version_id; |
| 619 |
se->section_id = global_section_id++; |
| 620 |
se->save_live_state = save_live_state; |
| 621 |
se->save_state = save_state; |
| 622 |
se->load_state = load_state; |
| 623 |
se->opaque = opaque; |
| 624 |
se->next = NULL;
|
| 625 |
|
| 626 |
/* add at the end of list */
|
| 627 |
pse = &first_se; |
| 628 |
while (*pse != NULL) { |
| 629 |
if (instance_id == -1 |
| 630 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
| 631 |
&& se->instance_id <= (*pse)->instance_id) |
| 632 |
se->instance_id = (*pse)->instance_id + 1;
|
| 633 |
pse = &(*pse)->next; |
| 634 |
} |
| 635 |
*pse = se; |
| 636 |
return 0; |
| 637 |
} |
| 638 |
|
| 639 |
int register_savevm(const char *idstr, |
| 640 |
int instance_id,
|
| 641 |
int version_id,
|
| 642 |
SaveStateHandler *save_state, |
| 643 |
LoadStateHandler *load_state, |
| 644 |
void *opaque)
|
| 645 |
{
|
| 646 |
return register_savevm_live(idstr, instance_id, version_id,
|
| 647 |
NULL, save_state, load_state, opaque);
|
| 648 |
} |
| 649 |
|
| 650 |
void unregister_savevm(const char *idstr, void *opaque) |
| 651 |
{
|
| 652 |
SaveStateEntry **pse; |
| 653 |
|
| 654 |
pse = &first_se; |
| 655 |
while (*pse != NULL) { |
| 656 |
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
| 657 |
SaveStateEntry *next = (*pse)->next; |
| 658 |
qemu_free(*pse); |
| 659 |
*pse = next; |
| 660 |
continue;
|
| 661 |
} |
| 662 |
pse = &(*pse)->next; |
| 663 |
} |
| 664 |
} |
| 665 |
|
| 666 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
| 667 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 668 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
| 669 |
|
| 670 |
#define QEMU_VM_EOF 0x00 |
| 671 |
#define QEMU_VM_SECTION_START 0x01 |
| 672 |
#define QEMU_VM_SECTION_PART 0x02 |
| 673 |
#define QEMU_VM_SECTION_END 0x03 |
| 674 |
#define QEMU_VM_SECTION_FULL 0x04 |
| 675 |
|
| 676 |
int qemu_savevm_state_begin(QEMUFile *f)
|
| 677 |
{
|
| 678 |
SaveStateEntry *se; |
| 679 |
|
| 680 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 681 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 682 |
|
| 683 |
for (se = first_se; se != NULL; se = se->next) { |
| 684 |
int len;
|
| 685 |
|
| 686 |
if (se->save_live_state == NULL) |
| 687 |
continue;
|
| 688 |
|
| 689 |
/* Section type */
|
| 690 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 691 |
qemu_put_be32(f, se->section_id); |
| 692 |
|
| 693 |
/* ID string */
|
| 694 |
len = strlen(se->idstr); |
| 695 |
qemu_put_byte(f, len); |
| 696 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 697 |
|
| 698 |
qemu_put_be32(f, se->instance_id); |
| 699 |
qemu_put_be32(f, se->version_id); |
| 700 |
|
| 701 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 702 |
} |
| 703 |
|
| 704 |
if (qemu_file_has_error(f))
|
| 705 |
return -EIO;
|
| 706 |
|
| 707 |
return 0; |
| 708 |
} |
| 709 |
|
| 710 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
| 711 |
{
|
| 712 |
SaveStateEntry *se; |
| 713 |
int ret = 1; |
| 714 |
|
| 715 |
for (se = first_se; se != NULL; se = se->next) { |
| 716 |
if (se->save_live_state == NULL) |
| 717 |
continue;
|
| 718 |
|
| 719 |
/* Section type */
|
| 720 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 721 |
qemu_put_be32(f, se->section_id); |
| 722 |
|
| 723 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 724 |
} |
| 725 |
|
| 726 |
if (ret)
|
| 727 |
return 1; |
| 728 |
|
| 729 |
if (qemu_file_has_error(f))
|
| 730 |
return -EIO;
|
| 731 |
|
| 732 |
return 0; |
| 733 |
} |
| 734 |
|
| 735 |
int qemu_savevm_state_complete(QEMUFile *f)
|
| 736 |
{
|
| 737 |
SaveStateEntry *se; |
| 738 |
|
| 739 |
for (se = first_se; se != NULL; se = se->next) { |
| 740 |
if (se->save_live_state == NULL) |
| 741 |
continue;
|
| 742 |
|
| 743 |
/* Section type */
|
| 744 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 745 |
qemu_put_be32(f, se->section_id); |
| 746 |
|
| 747 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 748 |
} |
| 749 |
|
| 750 |
for(se = first_se; se != NULL; se = se->next) { |
| 751 |
int len;
|
| 752 |
|
| 753 |
if (se->save_state == NULL) |
| 754 |
continue;
|
| 755 |
|
| 756 |
/* Section type */
|
| 757 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 758 |
qemu_put_be32(f, se->section_id); |
| 759 |
|
| 760 |
/* ID string */
|
| 761 |
len = strlen(se->idstr); |
| 762 |
qemu_put_byte(f, len); |
| 763 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 764 |
|
| 765 |
qemu_put_be32(f, se->instance_id); |
| 766 |
qemu_put_be32(f, se->version_id); |
| 767 |
|
| 768 |
se->save_state(f, se->opaque); |
| 769 |
} |
| 770 |
|
| 771 |
qemu_put_byte(f, QEMU_VM_EOF); |
| 772 |
|
| 773 |
if (qemu_file_has_error(f))
|
| 774 |
return -EIO;
|
| 775 |
|
| 776 |
return 0; |
| 777 |
} |
| 778 |
|
| 779 |
int qemu_savevm_state(QEMUFile *f)
|
| 780 |
{
|
| 781 |
int saved_vm_running;
|
| 782 |
int ret;
|
| 783 |
|
| 784 |
saved_vm_running = vm_running; |
| 785 |
vm_stop(0);
|
| 786 |
|
| 787 |
bdrv_flush_all(); |
| 788 |
|
| 789 |
ret = qemu_savevm_state_begin(f); |
| 790 |
if (ret < 0) |
| 791 |
goto out;
|
| 792 |
|
| 793 |
do {
|
| 794 |
ret = qemu_savevm_state_iterate(f); |
| 795 |
if (ret < 0) |
| 796 |
goto out;
|
| 797 |
} while (ret == 0); |
| 798 |
|
| 799 |
ret = qemu_savevm_state_complete(f); |
| 800 |
|
| 801 |
out:
|
| 802 |
if (qemu_file_has_error(f))
|
| 803 |
ret = -EIO; |
| 804 |
|
| 805 |
if (!ret && saved_vm_running)
|
| 806 |
vm_start(); |
| 807 |
|
| 808 |
return ret;
|
| 809 |
} |
| 810 |
|
| 811 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 812 |
{
|
| 813 |
SaveStateEntry *se; |
| 814 |
|
| 815 |
for(se = first_se; se != NULL; se = se->next) { |
| 816 |
if (!strcmp(se->idstr, idstr) &&
|
| 817 |
instance_id == se->instance_id) |
| 818 |
return se;
|
| 819 |
} |
| 820 |
return NULL; |
| 821 |
} |
| 822 |
|
| 823 |
typedef struct LoadStateEntry { |
| 824 |
SaveStateEntry *se; |
| 825 |
int section_id;
|
| 826 |
int version_id;
|
| 827 |
struct LoadStateEntry *next;
|
| 828 |
} LoadStateEntry; |
| 829 |
|
| 830 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
| 831 |
{
|
| 832 |
SaveStateEntry *se; |
| 833 |
int len, ret, instance_id, record_len, version_id;
|
| 834 |
int64_t total_len, end_pos, cur_pos; |
| 835 |
char idstr[256]; |
| 836 |
|
| 837 |
total_len = qemu_get_be64(f); |
| 838 |
end_pos = total_len + qemu_ftell(f); |
| 839 |
for(;;) {
|
| 840 |
if (qemu_ftell(f) >= end_pos)
|
| 841 |
break;
|
| 842 |
len = qemu_get_byte(f); |
| 843 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 844 |
idstr[len] = '\0';
|
| 845 |
instance_id = qemu_get_be32(f); |
| 846 |
version_id = qemu_get_be32(f); |
| 847 |
record_len = qemu_get_be32(f); |
| 848 |
cur_pos = qemu_ftell(f); |
| 849 |
se = find_se(idstr, instance_id); |
| 850 |
if (!se) {
|
| 851 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
| 852 |
instance_id, idstr); |
| 853 |
} else {
|
| 854 |
ret = se->load_state(f, se->opaque, version_id); |
| 855 |
if (ret < 0) { |
| 856 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
| 857 |
instance_id, idstr); |
| 858 |
} |
| 859 |
} |
| 860 |
/* always seek to exact end of record */
|
| 861 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
| 862 |
} |
| 863 |
|
| 864 |
if (qemu_file_has_error(f))
|
| 865 |
return -EIO;
|
| 866 |
|
| 867 |
return 0; |
| 868 |
} |
| 869 |
|
| 870 |
int qemu_loadvm_state(QEMUFile *f)
|
| 871 |
{
|
| 872 |
LoadStateEntry *first_le = NULL;
|
| 873 |
uint8_t section_type; |
| 874 |
unsigned int v; |
| 875 |
int ret;
|
| 876 |
|
| 877 |
v = qemu_get_be32(f); |
| 878 |
if (v != QEMU_VM_FILE_MAGIC)
|
| 879 |
return -EINVAL;
|
| 880 |
|
| 881 |
v = qemu_get_be32(f); |
| 882 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
| 883 |
return qemu_loadvm_state_v2(f);
|
| 884 |
if (v != QEMU_VM_FILE_VERSION)
|
| 885 |
return -ENOTSUP;
|
| 886 |
|
| 887 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
| 888 |
uint32_t instance_id, version_id, section_id; |
| 889 |
LoadStateEntry *le; |
| 890 |
SaveStateEntry *se; |
| 891 |
char idstr[257]; |
| 892 |
int len;
|
| 893 |
|
| 894 |
switch (section_type) {
|
| 895 |
case QEMU_VM_SECTION_START:
|
| 896 |
case QEMU_VM_SECTION_FULL:
|
| 897 |
/* Read section start */
|
| 898 |
section_id = qemu_get_be32(f); |
| 899 |
len = qemu_get_byte(f); |
| 900 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 901 |
idstr[len] = 0;
|
| 902 |
instance_id = qemu_get_be32(f); |
| 903 |
version_id = qemu_get_be32(f); |
| 904 |
|
| 905 |
/* Find savevm section */
|
| 906 |
se = find_se(idstr, instance_id); |
| 907 |
if (se == NULL) { |
| 908 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
| 909 |
ret = -EINVAL; |
| 910 |
goto out;
|
| 911 |
} |
| 912 |
|
| 913 |
/* Validate version */
|
| 914 |
if (version_id > se->version_id) {
|
| 915 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
| 916 |
version_id, idstr, se->version_id); |
| 917 |
ret = -EINVAL; |
| 918 |
goto out;
|
| 919 |
} |
| 920 |
|
| 921 |
/* Add entry */
|
| 922 |
le = qemu_mallocz(sizeof(*le));
|
| 923 |
|
| 924 |
le->se = se; |
| 925 |
le->section_id = section_id; |
| 926 |
le->version_id = version_id; |
| 927 |
le->next = first_le; |
| 928 |
first_le = le; |
| 929 |
|
| 930 |
le->se->load_state(f, le->se->opaque, le->version_id); |
| 931 |
break;
|
| 932 |
case QEMU_VM_SECTION_PART:
|
| 933 |
case QEMU_VM_SECTION_END:
|
| 934 |
section_id = qemu_get_be32(f); |
| 935 |
|
| 936 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
| 937 |
if (le == NULL) { |
| 938 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
| 939 |
ret = -EINVAL; |
| 940 |
goto out;
|
| 941 |
} |
| 942 |
|
| 943 |
le->se->load_state(f, le->se->opaque, le->version_id); |
| 944 |
break;
|
| 945 |
default:
|
| 946 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
| 947 |
ret = -EINVAL; |
| 948 |
goto out;
|
| 949 |
} |
| 950 |
} |
| 951 |
|
| 952 |
ret = 0;
|
| 953 |
|
| 954 |
out:
|
| 955 |
while (first_le) {
|
| 956 |
LoadStateEntry *le = first_le; |
| 957 |
first_le = first_le->next; |
| 958 |
qemu_free(le); |
| 959 |
} |
| 960 |
|
| 961 |
if (qemu_file_has_error(f))
|
| 962 |
ret = -EIO; |
| 963 |
|
| 964 |
return ret;
|
| 965 |
} |
| 966 |
|
| 967 |
/* device can contain snapshots */
|
| 968 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
| 969 |
{
|
| 970 |
return (bs &&
|
| 971 |
!bdrv_is_removable(bs) && |
| 972 |
!bdrv_is_read_only(bs)); |
| 973 |
} |
| 974 |
|
| 975 |
/* device must be snapshots in order to have a reliable snapshot */
|
| 976 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
| 977 |
{
|
| 978 |
return (bs &&
|
| 979 |
!bdrv_is_removable(bs) && |
| 980 |
!bdrv_is_read_only(bs)); |
| 981 |
} |
| 982 |
|
| 983 |
static BlockDriverState *get_bs_snapshots(void) |
| 984 |
{
|
| 985 |
BlockDriverState *bs; |
| 986 |
int i;
|
| 987 |
|
| 988 |
if (bs_snapshots)
|
| 989 |
return bs_snapshots;
|
| 990 |
for(i = 0; i <= nb_drives; i++) { |
| 991 |
bs = drives_table[i].bdrv; |
| 992 |
if (bdrv_can_snapshot(bs))
|
| 993 |
goto ok;
|
| 994 |
} |
| 995 |
return NULL; |
| 996 |
ok:
|
| 997 |
bs_snapshots = bs; |
| 998 |
return bs;
|
| 999 |
} |
| 1000 |
|
| 1001 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 1002 |
const char *name) |
| 1003 |
{
|
| 1004 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1005 |
int nb_sns, i, ret;
|
| 1006 |
|
| 1007 |
ret = -ENOENT; |
| 1008 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1009 |
if (nb_sns < 0) |
| 1010 |
return ret;
|
| 1011 |
for(i = 0; i < nb_sns; i++) { |
| 1012 |
sn = &sn_tab[i]; |
| 1013 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
| 1014 |
*sn_info = *sn; |
| 1015 |
ret = 0;
|
| 1016 |
break;
|
| 1017 |
} |
| 1018 |
} |
| 1019 |
qemu_free(sn_tab); |
| 1020 |
return ret;
|
| 1021 |
} |
| 1022 |
|
| 1023 |
void do_savevm(Monitor *mon, const char *name) |
| 1024 |
{
|
| 1025 |
BlockDriverState *bs, *bs1; |
| 1026 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1027 |
int must_delete, ret, i;
|
| 1028 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1029 |
QEMUFile *f; |
| 1030 |
int saved_vm_running;
|
| 1031 |
uint32_t vm_state_size; |
| 1032 |
#ifdef _WIN32
|
| 1033 |
struct _timeb tb;
|
| 1034 |
#else
|
| 1035 |
struct timeval tv;
|
| 1036 |
#endif
|
| 1037 |
|
| 1038 |
bs = get_bs_snapshots(); |
| 1039 |
if (!bs) {
|
| 1040 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
| 1041 |
return;
|
| 1042 |
} |
| 1043 |
|
| 1044 |
/* ??? Should this occur after vm_stop? */
|
| 1045 |
qemu_aio_flush(); |
| 1046 |
|
| 1047 |
saved_vm_running = vm_running; |
| 1048 |
vm_stop(0);
|
| 1049 |
|
| 1050 |
must_delete = 0;
|
| 1051 |
if (name) {
|
| 1052 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1053 |
if (ret >= 0) { |
| 1054 |
must_delete = 1;
|
| 1055 |
} |
| 1056 |
} |
| 1057 |
memset(sn, 0, sizeof(*sn)); |
| 1058 |
if (must_delete) {
|
| 1059 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
| 1060 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
| 1061 |
} else {
|
| 1062 |
if (name)
|
| 1063 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
| 1064 |
} |
| 1065 |
|
| 1066 |
/* fill auxiliary fields */
|
| 1067 |
#ifdef _WIN32
|
| 1068 |
_ftime(&tb); |
| 1069 |
sn->date_sec = tb.time; |
| 1070 |
sn->date_nsec = tb.millitm * 1000000;
|
| 1071 |
#else
|
| 1072 |
gettimeofday(&tv, NULL);
|
| 1073 |
sn->date_sec = tv.tv_sec; |
| 1074 |
sn->date_nsec = tv.tv_usec * 1000;
|
| 1075 |
#endif
|
| 1076 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1077 |
|
| 1078 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1079 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
| 1080 |
bdrv_get_device_name(bs)); |
| 1081 |
goto the_end;
|
| 1082 |
} |
| 1083 |
|
| 1084 |
/* save the VM state */
|
| 1085 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
| 1086 |
if (!f) {
|
| 1087 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1088 |
goto the_end;
|
| 1089 |
} |
| 1090 |
ret = qemu_savevm_state(f); |
| 1091 |
vm_state_size = qemu_ftell(f); |
| 1092 |
qemu_fclose(f); |
| 1093 |
if (ret < 0) { |
| 1094 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
| 1095 |
goto the_end;
|
| 1096 |
} |
| 1097 |
|
| 1098 |
/* create the snapshots */
|
| 1099 |
|
| 1100 |
for(i = 0; i < nb_drives; i++) { |
| 1101 |
bs1 = drives_table[i].bdrv; |
| 1102 |
if (bdrv_has_snapshot(bs1)) {
|
| 1103 |
if (must_delete) {
|
| 1104 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
| 1105 |
if (ret < 0) { |
| 1106 |
monitor_printf(mon, |
| 1107 |
"Error while deleting snapshot on '%s'\n",
|
| 1108 |
bdrv_get_device_name(bs1)); |
| 1109 |
} |
| 1110 |
} |
| 1111 |
/* Write VM state size only to the image that contains the state */
|
| 1112 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
| 1113 |
ret = bdrv_snapshot_create(bs1, sn); |
| 1114 |
if (ret < 0) { |
| 1115 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
| 1116 |
bdrv_get_device_name(bs1)); |
| 1117 |
} |
| 1118 |
} |
| 1119 |
} |
| 1120 |
|
| 1121 |
the_end:
|
| 1122 |
if (saved_vm_running)
|
| 1123 |
vm_start(); |
| 1124 |
} |
| 1125 |
|
| 1126 |
void do_loadvm(Monitor *mon, const char *name) |
| 1127 |
{
|
| 1128 |
BlockDriverState *bs, *bs1; |
| 1129 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1130 |
QEMUSnapshotInfo sn; |
| 1131 |
QEMUFile *f; |
| 1132 |
int i, ret;
|
| 1133 |
int saved_vm_running;
|
| 1134 |
|
| 1135 |
bs = get_bs_snapshots(); |
| 1136 |
if (!bs) {
|
| 1137 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1138 |
return;
|
| 1139 |
} |
| 1140 |
|
| 1141 |
/* Flush all IO requests so they don't interfere with the new state. */
|
| 1142 |
qemu_aio_flush(); |
| 1143 |
|
| 1144 |
saved_vm_running = vm_running; |
| 1145 |
vm_stop(0);
|
| 1146 |
|
| 1147 |
for(i = 0; i <= nb_drives; i++) { |
| 1148 |
bs1 = drives_table[i].bdrv; |
| 1149 |
if (bdrv_has_snapshot(bs1)) {
|
| 1150 |
ret = bdrv_snapshot_goto(bs1, name); |
| 1151 |
if (ret < 0) { |
| 1152 |
if (bs != bs1)
|
| 1153 |
monitor_printf(mon, "Warning: ");
|
| 1154 |
switch(ret) {
|
| 1155 |
case -ENOTSUP:
|
| 1156 |
monitor_printf(mon, |
| 1157 |
"Snapshots not supported on device '%s'\n",
|
| 1158 |
bdrv_get_device_name(bs1)); |
| 1159 |
break;
|
| 1160 |
case -ENOENT:
|
| 1161 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
| 1162 |
"device '%s'\n",
|
| 1163 |
name, bdrv_get_device_name(bs1)); |
| 1164 |
break;
|
| 1165 |
default:
|
| 1166 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
| 1167 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1168 |
break;
|
| 1169 |
} |
| 1170 |
/* fatal on snapshot block device */
|
| 1171 |
if (bs == bs1)
|
| 1172 |
goto the_end;
|
| 1173 |
} |
| 1174 |
} |
| 1175 |
} |
| 1176 |
|
| 1177 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1178 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
| 1179 |
bdrv_get_device_name(bs)); |
| 1180 |
return;
|
| 1181 |
} |
| 1182 |
|
| 1183 |
/* Don't even try to load empty VM states */
|
| 1184 |
ret = bdrv_snapshot_find(bs, &sn, name); |
| 1185 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1186 |
goto the_end;
|
| 1187 |
|
| 1188 |
/* restore the VM state */
|
| 1189 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
| 1190 |
if (!f) {
|
| 1191 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1192 |
goto the_end;
|
| 1193 |
} |
| 1194 |
ret = qemu_loadvm_state(f); |
| 1195 |
qemu_fclose(f); |
| 1196 |
if (ret < 0) { |
| 1197 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
| 1198 |
} |
| 1199 |
the_end:
|
| 1200 |
if (saved_vm_running)
|
| 1201 |
vm_start(); |
| 1202 |
} |
| 1203 |
|
| 1204 |
void do_delvm(Monitor *mon, const char *name) |
| 1205 |
{
|
| 1206 |
BlockDriverState *bs, *bs1; |
| 1207 |
int i, ret;
|
| 1208 |
|
| 1209 |
bs = get_bs_snapshots(); |
| 1210 |
if (!bs) {
|
| 1211 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1212 |
return;
|
| 1213 |
} |
| 1214 |
|
| 1215 |
for(i = 0; i <= nb_drives; i++) { |
| 1216 |
bs1 = drives_table[i].bdrv; |
| 1217 |
if (bdrv_has_snapshot(bs1)) {
|
| 1218 |
ret = bdrv_snapshot_delete(bs1, name); |
| 1219 |
if (ret < 0) { |
| 1220 |
if (ret == -ENOTSUP)
|
| 1221 |
monitor_printf(mon, |
| 1222 |
"Snapshots not supported on device '%s'\n",
|
| 1223 |
bdrv_get_device_name(bs1)); |
| 1224 |
else
|
| 1225 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
| 1226 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1227 |
} |
| 1228 |
} |
| 1229 |
} |
| 1230 |
} |
| 1231 |
|
| 1232 |
void do_info_snapshots(Monitor *mon)
|
| 1233 |
{
|
| 1234 |
BlockDriverState *bs, *bs1; |
| 1235 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1236 |
int nb_sns, i;
|
| 1237 |
char buf[256]; |
| 1238 |
|
| 1239 |
bs = get_bs_snapshots(); |
| 1240 |
if (!bs) {
|
| 1241 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
| 1242 |
return;
|
| 1243 |
} |
| 1244 |
monitor_printf(mon, "Snapshot devices:");
|
| 1245 |
for(i = 0; i <= nb_drives; i++) { |
| 1246 |
bs1 = drives_table[i].bdrv; |
| 1247 |
if (bdrv_has_snapshot(bs1)) {
|
| 1248 |
if (bs == bs1)
|
| 1249 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
| 1250 |
} |
| 1251 |
} |
| 1252 |
monitor_printf(mon, "\n");
|
| 1253 |
|
| 1254 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1255 |
if (nb_sns < 0) { |
| 1256 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
| 1257 |
return;
|
| 1258 |
} |
| 1259 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
| 1260 |
bdrv_get_device_name(bs)); |
| 1261 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1262 |
for(i = 0; i < nb_sns; i++) { |
| 1263 |
sn = &sn_tab[i]; |
| 1264 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1265 |
} |
| 1266 |
qemu_free(sn_tab); |
| 1267 |
} |