David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame^] | 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 | #include "qemu_file.h" |
| 94 | |
| 95 | /* point to the block driver where the snapshots are managed */ |
| 96 | static BlockDriverState *bs_snapshots; |
| 97 | |
| 98 | #define SELF_ANNOUNCE_ROUNDS 5 |
| 99 | #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
| 100 | //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */ |
| 101 | #define EXPERIMENTAL_MAGIC 0xf1f23f4f |
| 102 | |
| 103 | static int announce_self_create(uint8_t *buf, |
| 104 | uint8_t *mac_addr) |
| 105 | { |
| 106 | uint32_t magic = EXPERIMENTAL_MAGIC; |
| 107 | uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
| 108 | |
| 109 | /* FIXME: should we send a different packet (arp/rarp/ping)? */ |
| 110 | |
| 111 | memset(buf, 0, 64); |
| 112 | memset(buf, 0xff, 6); /* h_dst */ |
| 113 | memcpy(buf + 6, mac_addr, 6); /* h_src */ |
| 114 | memcpy(buf + 12, &proto, 2); /* h_proto */ |
| 115 | memcpy(buf + 14, &magic, 4); /* magic */ |
| 116 | |
| 117 | return 64; /* len */ |
| 118 | } |
| 119 | |
| 120 | static void qemu_announce_self_once(void *opaque) |
| 121 | { |
| 122 | int i, len; |
| 123 | VLANState *vlan; |
| 124 | VLANClientState *vc; |
| 125 | uint8_t buf[256]; |
| 126 | static int count = SELF_ANNOUNCE_ROUNDS; |
| 127 | QEMUTimer *timer = *(QEMUTimer **)opaque; |
| 128 | |
| 129 | for (i = 0; i < MAX_NICS; i++) { |
| 130 | if (!nd_table[i].used) |
| 131 | continue; |
| 132 | len = announce_self_create(buf, nd_table[i].macaddr); |
| 133 | vlan = nd_table[i].vlan; |
| 134 | for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
| 135 | vc->receive(vc, buf, len); |
| 136 | } |
| 137 | } |
| 138 | if (count--) { |
| 139 | qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100); |
| 140 | } else { |
| 141 | qemu_del_timer(timer); |
| 142 | qemu_free_timer(timer); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | void qemu_announce_self(void) |
| 147 | { |
| 148 | static QEMUTimer *timer; |
| 149 | timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
| 150 | qemu_announce_self_once(&timer); |
| 151 | } |
| 152 | |
| 153 | /***********************************************************/ |
| 154 | /* savevm/loadvm support */ |
| 155 | |
| 156 | #define IO_BUF_SIZE 32768 |
| 157 | |
| 158 | struct QEMUFile { |
| 159 | QEMUFilePutBufferFunc *put_buffer; |
| 160 | QEMUFileGetBufferFunc *get_buffer; |
| 161 | QEMUFileCloseFunc *close; |
| 162 | QEMUFileRateLimit *rate_limit; |
| 163 | QEMUFileSetRateLimit *set_rate_limit; |
| 164 | void *opaque; |
| 165 | int is_write; |
| 166 | |
| 167 | int64_t buf_offset; /* start of buffer when writing, end of buffer |
| 168 | when reading */ |
| 169 | int buf_index; |
| 170 | int buf_size; /* 0 when writing */ |
| 171 | uint8_t buf[IO_BUF_SIZE]; |
| 172 | |
| 173 | int has_error; |
| 174 | }; |
| 175 | |
| 176 | typedef struct QEMUFilePopen |
| 177 | { |
| 178 | FILE *popen_file; |
| 179 | QEMUFile *file; |
| 180 | } QEMUFilePopen; |
| 181 | |
| 182 | typedef struct QEMUFileSocket |
| 183 | { |
| 184 | int fd; |
| 185 | QEMUFile *file; |
| 186 | } QEMUFileSocket; |
| 187 | |
| 188 | static int file_socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 189 | { |
| 190 | QEMUFileSocket *s = opaque; |
| 191 | ssize_t len; |
| 192 | |
| 193 | do { |
| 194 | len = recv(s->fd, (void *)buf, size, 0); |
| 195 | } while (len == -1 && socket_error() == EINTR); |
| 196 | |
| 197 | if (len == -1) |
| 198 | len = -socket_error(); |
| 199 | |
| 200 | return len; |
| 201 | } |
| 202 | |
| 203 | static int file_socket_close(void *opaque) |
| 204 | { |
| 205 | QEMUFileSocket *s = opaque; |
| 206 | qemu_free(s); |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
| 211 | { |
| 212 | QEMUFilePopen *s = opaque; |
| 213 | return fwrite(buf, 1, size, s->popen_file); |
| 214 | } |
| 215 | |
| 216 | static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 217 | { |
| 218 | QEMUFilePopen *s = opaque; |
| 219 | FILE *fp = s->popen_file; |
| 220 | int bytes; |
| 221 | |
| 222 | do { |
| 223 | clearerr(fp); |
| 224 | bytes = fread(buf, 1, size, fp); |
| 225 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
| 226 | return bytes; |
| 227 | } |
| 228 | |
| 229 | static int popen_close(void *opaque) |
| 230 | { |
| 231 | QEMUFilePopen *s = opaque; |
| 232 | pclose(s->popen_file); |
| 233 | qemu_free(s); |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
| 238 | { |
| 239 | QEMUFilePopen *s; |
| 240 | |
| 241 | if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 242 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
| 243 | return NULL; |
| 244 | } |
| 245 | |
| 246 | s = qemu_mallocz(sizeof(QEMUFilePopen)); |
| 247 | |
| 248 | s->popen_file = popen_file; |
| 249 | |
| 250 | if(mode[0] == 'r') { |
| 251 | s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL); |
| 252 | } else { |
| 253 | s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL); |
| 254 | } |
| 255 | return s->file; |
| 256 | } |
| 257 | |
| 258 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 259 | { |
| 260 | FILE *popen_file; |
| 261 | |
| 262 | popen_file = popen(command, mode); |
| 263 | if(popen_file == NULL) { |
| 264 | return NULL; |
| 265 | } |
| 266 | |
| 267 | return qemu_popen(popen_file, mode); |
| 268 | } |
| 269 | |
| 270 | int qemu_popen_fd(QEMUFile *f) |
| 271 | { |
| 272 | QEMUFilePopen *p; |
| 273 | int fd; |
| 274 | |
| 275 | p = (QEMUFilePopen *)f->opaque; |
| 276 | fd = fileno(p->popen_file); |
| 277 | |
| 278 | return fd; |
| 279 | } |
| 280 | |
| 281 | QEMUFile *qemu_fopen_socket(int fd) |
| 282 | { |
| 283 | QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket)); |
| 284 | |
| 285 | s->fd = fd; |
| 286 | s->file = qemu_fopen_ops(s, NULL, file_socket_get_buffer, file_socket_close, NULL, NULL); |
| 287 | return s->file; |
| 288 | } |
| 289 | |
| 290 | typedef struct QEMUFileStdio |
| 291 | { |
| 292 | FILE *outfile; |
| 293 | } QEMUFileStdio; |
| 294 | |
| 295 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 296 | int64_t pos, int size) |
| 297 | { |
| 298 | QEMUFileStdio *s = opaque; |
| 299 | fseek(s->outfile, pos, SEEK_SET); |
| 300 | fwrite(buf, 1, size, s->outfile); |
| 301 | return size; |
| 302 | } |
| 303 | |
| 304 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 305 | { |
| 306 | QEMUFileStdio *s = opaque; |
| 307 | fseek(s->outfile, pos, SEEK_SET); |
| 308 | return fread(buf, 1, size, s->outfile); |
| 309 | } |
| 310 | |
| 311 | static int file_close(void *opaque) |
| 312 | { |
| 313 | QEMUFileStdio *s = opaque; |
| 314 | fclose(s->outfile); |
| 315 | qemu_free(s); |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 320 | { |
| 321 | QEMUFileStdio *s; |
| 322 | |
| 323 | s = qemu_mallocz(sizeof(QEMUFileStdio)); |
| 324 | |
| 325 | s->outfile = fopen(filename, mode); |
| 326 | if (!s->outfile) |
| 327 | goto fail; |
| 328 | |
| 329 | if (!strcmp(mode, "wb")) |
| 330 | return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL, NULL); |
| 331 | else if (!strcmp(mode, "rb")) |
| 332 | return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL, NULL); |
| 333 | |
| 334 | fail: |
| 335 | if (s->outfile) |
| 336 | fclose(s->outfile); |
| 337 | qemu_free(s); |
| 338 | return NULL; |
| 339 | } |
| 340 | |
| 341 | typedef struct QEMUFileBdrv |
| 342 | { |
| 343 | BlockDriverState *bs; |
| 344 | int64_t base_offset; |
| 345 | } QEMUFileBdrv; |
| 346 | |
| 347 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
| 348 | int64_t pos, int size) |
| 349 | { |
| 350 | QEMUFileBdrv *s = opaque; |
| 351 | bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size); |
| 352 | return size; |
| 353 | } |
| 354 | |
| 355 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 356 | { |
| 357 | QEMUFileBdrv *s = opaque; |
| 358 | return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size); |
| 359 | } |
| 360 | |
| 361 | static int bdrv_fclose(void *opaque) |
| 362 | { |
| 363 | QEMUFileBdrv *s = opaque; |
| 364 | qemu_free(s); |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
| 369 | { |
| 370 | QEMUFileBdrv *s; |
| 371 | |
| 372 | s = qemu_mallocz(sizeof(QEMUFileBdrv)); |
| 373 | |
| 374 | s->bs = bs; |
| 375 | s->base_offset = offset; |
| 376 | |
| 377 | if (is_writable) |
| 378 | return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
| 379 | |
| 380 | return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
| 381 | } |
| 382 | |
| 383 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, |
| 384 | QEMUFileGetBufferFunc *get_buffer, |
| 385 | QEMUFileCloseFunc *close, |
| 386 | QEMUFileRateLimit *rate_limit, |
| 387 | QEMUFileSetRateLimit *set_rate_limit) |
| 388 | { |
| 389 | QEMUFile *f; |
| 390 | |
| 391 | f = qemu_mallocz(sizeof(QEMUFile)); |
| 392 | |
| 393 | f->opaque = opaque; |
| 394 | f->put_buffer = put_buffer; |
| 395 | f->get_buffer = get_buffer; |
| 396 | f->close = close; |
| 397 | f->rate_limit = rate_limit; |
| 398 | f->set_rate_limit = set_rate_limit; |
| 399 | f->is_write = 0; |
| 400 | |
| 401 | return f; |
| 402 | } |
| 403 | |
| 404 | int qemu_file_has_error(QEMUFile *f) |
| 405 | { |
| 406 | return f->has_error; |
| 407 | } |
| 408 | |
| 409 | void qemu_file_set_error(QEMUFile *f) |
| 410 | { |
| 411 | f->has_error = 1; |
| 412 | } |
| 413 | |
| 414 | void qemu_fflush(QEMUFile *f) |
| 415 | { |
| 416 | if (!f->put_buffer) |
| 417 | return; |
| 418 | |
| 419 | if (f->is_write && f->buf_index > 0) { |
| 420 | int len; |
| 421 | |
| 422 | len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 423 | if (len > 0) |
| 424 | f->buf_offset += f->buf_index; |
| 425 | else |
| 426 | f->has_error = 1; |
| 427 | f->buf_index = 0; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | static void qemu_fill_buffer(QEMUFile *f) |
| 432 | { |
| 433 | int len; |
| 434 | |
| 435 | if (!f->get_buffer) |
| 436 | return; |
| 437 | |
| 438 | if (f->is_write) |
| 439 | abort(); |
| 440 | |
| 441 | len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 442 | if (len > 0) { |
| 443 | f->buf_index = 0; |
| 444 | f->buf_size = len; |
| 445 | f->buf_offset += len; |
| 446 | } else if (len != -EAGAIN) |
| 447 | f->has_error = 1; |
| 448 | } |
| 449 | |
| 450 | int qemu_fclose(QEMUFile *f) |
| 451 | { |
| 452 | int ret = 0; |
| 453 | qemu_fflush(f); |
| 454 | if (f->close) |
| 455 | ret = f->close(f->opaque); |
| 456 | qemu_free(f); |
| 457 | return ret; |
| 458 | } |
| 459 | |
| 460 | void qemu_file_put_notify(QEMUFile *f) |
| 461 | { |
| 462 | f->put_buffer(f->opaque, NULL, 0, 0); |
| 463 | } |
| 464 | |
| 465 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 466 | { |
| 467 | int l; |
| 468 | |
| 469 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 470 | fprintf(stderr, |
| 471 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 472 | abort(); |
| 473 | } |
| 474 | |
| 475 | while (!f->has_error && size > 0) { |
| 476 | l = IO_BUF_SIZE - f->buf_index; |
| 477 | if (l > size) |
| 478 | l = size; |
| 479 | memcpy(f->buf + f->buf_index, buf, l); |
| 480 | f->is_write = 1; |
| 481 | f->buf_index += l; |
| 482 | buf += l; |
| 483 | size -= l; |
| 484 | if (f->buf_index >= IO_BUF_SIZE) |
| 485 | qemu_fflush(f); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | void qemu_put_byte(QEMUFile *f, int v) |
| 490 | { |
| 491 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 492 | fprintf(stderr, |
| 493 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 494 | abort(); |
| 495 | } |
| 496 | |
| 497 | f->buf[f->buf_index++] = v; |
| 498 | f->is_write = 1; |
| 499 | if (f->buf_index >= IO_BUF_SIZE) |
| 500 | qemu_fflush(f); |
| 501 | } |
| 502 | |
| 503 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 504 | { |
| 505 | int size, l; |
| 506 | |
| 507 | if (f->is_write) |
| 508 | abort(); |
| 509 | |
| 510 | size = size1; |
| 511 | while (size > 0) { |
| 512 | l = f->buf_size - f->buf_index; |
| 513 | if (l == 0) { |
| 514 | qemu_fill_buffer(f); |
| 515 | l = f->buf_size - f->buf_index; |
| 516 | if (l == 0) |
| 517 | break; |
| 518 | } |
| 519 | if (l > size) |
| 520 | l = size; |
| 521 | memcpy(buf, f->buf + f->buf_index, l); |
| 522 | f->buf_index += l; |
| 523 | buf += l; |
| 524 | size -= l; |
| 525 | } |
| 526 | return size1 - size; |
| 527 | } |
| 528 | |
| 529 | int qemu_get_byte(QEMUFile *f) |
| 530 | { |
| 531 | if (f->is_write) |
| 532 | abort(); |
| 533 | |
| 534 | if (f->buf_index >= f->buf_size) { |
| 535 | qemu_fill_buffer(f); |
| 536 | if (f->buf_index >= f->buf_size) |
| 537 | return 0; |
| 538 | } |
| 539 | return f->buf[f->buf_index++]; |
| 540 | } |
| 541 | |
| 542 | int64_t qemu_ftell(QEMUFile *f) |
| 543 | { |
| 544 | return f->buf_offset - f->buf_size + f->buf_index; |
| 545 | } |
| 546 | |
| 547 | int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence) |
| 548 | { |
| 549 | if (whence == SEEK_SET) { |
| 550 | /* nothing to do */ |
| 551 | } else if (whence == SEEK_CUR) { |
| 552 | pos += qemu_ftell(f); |
| 553 | } else { |
| 554 | /* SEEK_END not supported */ |
| 555 | return -1; |
| 556 | } |
| 557 | if (f->put_buffer) { |
| 558 | qemu_fflush(f); |
| 559 | f->buf_offset = pos; |
| 560 | } else { |
| 561 | f->buf_offset = pos; |
| 562 | f->buf_index = 0; |
| 563 | f->buf_size = 0; |
| 564 | } |
| 565 | return pos; |
| 566 | } |
| 567 | |
| 568 | int qemu_file_rate_limit(QEMUFile *f) |
| 569 | { |
| 570 | if (f->rate_limit) |
| 571 | return f->rate_limit(f->opaque); |
| 572 | |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
| 577 | { |
| 578 | if (f->set_rate_limit) |
| 579 | return f->set_rate_limit(f->opaque, new_rate); |
| 580 | |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 585 | { |
| 586 | qemu_put_byte(f, v >> 8); |
| 587 | qemu_put_byte(f, v); |
| 588 | } |
| 589 | |
| 590 | void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 591 | { |
| 592 | qemu_put_byte(f, v >> 24); |
| 593 | qemu_put_byte(f, v >> 16); |
| 594 | qemu_put_byte(f, v >> 8); |
| 595 | qemu_put_byte(f, v); |
| 596 | } |
| 597 | |
| 598 | void qemu_put_be64(QEMUFile *f, uint64_t v) |
| 599 | { |
| 600 | qemu_put_be32(f, v >> 32); |
| 601 | qemu_put_be32(f, v); |
| 602 | } |
| 603 | |
| 604 | unsigned int qemu_get_be16(QEMUFile *f) |
| 605 | { |
| 606 | unsigned int v; |
| 607 | v = qemu_get_byte(f) << 8; |
| 608 | v |= qemu_get_byte(f); |
| 609 | return v; |
| 610 | } |
| 611 | |
| 612 | unsigned int qemu_get_be32(QEMUFile *f) |
| 613 | { |
| 614 | unsigned int v; |
| 615 | v = qemu_get_byte(f) << 24; |
| 616 | v |= qemu_get_byte(f) << 16; |
| 617 | v |= qemu_get_byte(f) << 8; |
| 618 | v |= qemu_get_byte(f); |
| 619 | return v; |
| 620 | } |
| 621 | |
| 622 | uint64_t qemu_get_be64(QEMUFile *f) |
| 623 | { |
| 624 | uint64_t v; |
| 625 | v = (uint64_t)qemu_get_be32(f) << 32; |
| 626 | v |= qemu_get_be32(f); |
| 627 | return v; |
| 628 | } |
| 629 | |
| 630 | void qemu_put_struct(QEMUFile* f, const QField* fields, const void* s) |
| 631 | { |
| 632 | const QField* qf = fields; |
| 633 | |
| 634 | for (;;) { |
| 635 | uint8_t* p = (uint8_t*)s + qf->offset; |
| 636 | |
| 637 | switch (qf->type) { |
| 638 | case Q_FIELD_END: |
| 639 | break; |
| 640 | case Q_FIELD_BYTE: |
| 641 | qemu_put_byte(f, p[0]); |
| 642 | break; |
| 643 | case Q_FIELD_INT16: |
| 644 | qemu_put_be16(f, ((uint16_t*)p)[0]); |
| 645 | break; |
| 646 | case Q_FIELD_INT32: |
| 647 | qemu_put_be32(f, ((uint32_t*)p)[0]); |
| 648 | break; |
| 649 | case Q_FIELD_INT64: |
| 650 | qemu_put_be64(f, ((uint64_t*)p)[0]); |
| 651 | break; |
| 652 | case Q_FIELD_BUFFER: |
| 653 | if (fields[1].type != Q_FIELD_BUFFER_SIZE || |
| 654 | fields[2].type != Q_FIELD_BUFFER_SIZE) |
| 655 | { |
| 656 | fprintf(stderr, "%s: invalid QFIELD_BUFFER item passed as argument. aborting\n", |
| 657 | __FUNCTION__ ); |
| 658 | exit(1); |
| 659 | } |
| 660 | else |
| 661 | { |
| 662 | uint32_t size = ((uint32_t)fields[1].offset << 16) | (uint32_t)fields[2].offset; |
| 663 | |
| 664 | qemu_put_buffer(f, p, size); |
| 665 | qf += 2; |
| 666 | } |
| 667 | break; |
| 668 | default: |
| 669 | fprintf(stderr, "%s: invalid fields list passed as argument. aborting\n", __FUNCTION__); |
| 670 | exit(1); |
| 671 | } |
| 672 | qf++; |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | int qemu_get_struct(QEMUFile* f, const QField* fields, void* s) |
| 677 | { |
| 678 | const QField* qf = fields; |
| 679 | |
| 680 | for (;;) { |
| 681 | uint8_t* p = (uint8_t*)s + qf->offset; |
| 682 | |
| 683 | switch (qf->type) { |
| 684 | case Q_FIELD_END: |
| 685 | break; |
| 686 | case Q_FIELD_BYTE: |
| 687 | p[0] = qemu_get_byte(f); |
| 688 | break; |
| 689 | case Q_FIELD_INT16: |
| 690 | ((uint16_t*)p)[0] = qemu_get_be16(f); |
| 691 | break; |
| 692 | case Q_FIELD_INT32: |
| 693 | ((uint32_t*)p)[0] = qemu_get_be32(f); |
| 694 | break; |
| 695 | case Q_FIELD_INT64: |
| 696 | ((uint64_t*)p)[0] = qemu_get_be64(f); |
| 697 | break; |
| 698 | case Q_FIELD_BUFFER: |
| 699 | if (fields[1].type != Q_FIELD_BUFFER_SIZE || |
| 700 | fields[2].type != Q_FIELD_BUFFER_SIZE) |
| 701 | { |
| 702 | fprintf(stderr, "%s: invalid QFIELD_BUFFER item passed as argument.\n", |
| 703 | __FUNCTION__ ); |
| 704 | return -1; |
| 705 | } |
| 706 | else |
| 707 | { |
| 708 | uint32_t size = ((uint32_t)fields[1].offset << 16) | (uint32_t)fields[2].offset; |
| 709 | int ret = qemu_get_buffer(f, p, size); |
| 710 | |
| 711 | if (ret != size) { |
| 712 | fprintf(stderr, "%s: not enough bytes to load structure\n", __FUNCTION__); |
| 713 | return -1; |
| 714 | } |
| 715 | qf += 2; |
| 716 | } |
| 717 | break; |
| 718 | default: |
| 719 | fprintf(stderr, "%s: invalid fields list passed as argument. aborting\n", __FUNCTION__); |
| 720 | exit(1); |
| 721 | } |
| 722 | qf++; |
| 723 | } |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | typedef struct SaveStateEntry { |
| 728 | char idstr[256]; |
| 729 | int instance_id; |
| 730 | int version_id; |
| 731 | int section_id; |
| 732 | SaveLiveStateHandler *save_live_state; |
| 733 | SaveStateHandler *save_state; |
| 734 | LoadStateHandler *load_state; |
| 735 | void *opaque; |
| 736 | struct SaveStateEntry *next; |
| 737 | } SaveStateEntry; |
| 738 | |
| 739 | static SaveStateEntry *first_se; |
| 740 | |
| 741 | /* TODO: Individual devices generally have very little idea about the rest |
| 742 | of the system, so instance_id should be removed/replaced. |
| 743 | Meanwhile pass -1 as instance_id if you do not already have a clearly |
| 744 | distinguishing id for all instances of your device class. */ |
| 745 | int register_savevm_live(const char *idstr, |
| 746 | int instance_id, |
| 747 | int version_id, |
| 748 | SaveLiveStateHandler *save_live_state, |
| 749 | SaveStateHandler *save_state, |
| 750 | LoadStateHandler *load_state, |
| 751 | void *opaque) |
| 752 | { |
| 753 | SaveStateEntry *se, **pse; |
| 754 | static int global_section_id; |
| 755 | |
| 756 | se = qemu_malloc(sizeof(SaveStateEntry)); |
| 757 | pstrcpy(se->idstr, sizeof(se->idstr), idstr); |
| 758 | se->instance_id = (instance_id == -1) ? 0 : instance_id; |
| 759 | se->version_id = version_id; |
| 760 | se->section_id = global_section_id++; |
| 761 | se->save_live_state = save_live_state; |
| 762 | se->save_state = save_state; |
| 763 | se->load_state = load_state; |
| 764 | se->opaque = opaque; |
| 765 | se->next = NULL; |
| 766 | |
| 767 | /* add at the end of list */ |
| 768 | pse = &first_se; |
| 769 | while (*pse != NULL) { |
| 770 | if (instance_id == -1 |
| 771 | && strcmp(se->idstr, (*pse)->idstr) == 0 |
| 772 | && se->instance_id <= (*pse)->instance_id) |
| 773 | se->instance_id = (*pse)->instance_id + 1; |
| 774 | pse = &(*pse)->next; |
| 775 | } |
| 776 | *pse = se; |
| 777 | return 0; |
| 778 | } |
| 779 | |
| 780 | int register_savevm(const char *idstr, |
| 781 | int instance_id, |
| 782 | int version_id, |
| 783 | SaveStateHandler *save_state, |
| 784 | LoadStateHandler *load_state, |
| 785 | void *opaque) |
| 786 | { |
| 787 | return register_savevm_live(idstr, instance_id, version_id, |
| 788 | NULL, save_state, load_state, opaque); |
| 789 | } |
| 790 | |
| 791 | void unregister_savevm(const char *idstr, void *opaque) |
| 792 | { |
| 793 | SaveStateEntry **pse; |
| 794 | |
| 795 | pse = &first_se; |
| 796 | while (*pse != NULL) { |
| 797 | if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
| 798 | SaveStateEntry *next = (*pse)->next; |
| 799 | qemu_free(*pse); |
| 800 | *pse = next; |
| 801 | continue; |
| 802 | } |
| 803 | pse = &(*pse)->next; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
| 808 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 809 | #define QEMU_VM_FILE_VERSION 0x00000003 |
| 810 | |
| 811 | #define QEMU_VM_EOF 0x00 |
| 812 | #define QEMU_VM_SECTION_START 0x01 |
| 813 | #define QEMU_VM_SECTION_PART 0x02 |
| 814 | #define QEMU_VM_SECTION_END 0x03 |
| 815 | #define QEMU_VM_SECTION_FULL 0x04 |
| 816 | |
| 817 | int qemu_savevm_state_begin(QEMUFile *f) |
| 818 | { |
| 819 | SaveStateEntry *se; |
| 820 | |
| 821 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 822 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 823 | |
| 824 | for (se = first_se; se != NULL; se = se->next) { |
| 825 | int len; |
| 826 | |
| 827 | if (se->save_live_state == NULL) |
| 828 | continue; |
| 829 | |
| 830 | /* Section type */ |
| 831 | qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 832 | qemu_put_be32(f, se->section_id); |
| 833 | |
| 834 | /* ID string */ |
| 835 | len = strlen(se->idstr); |
| 836 | qemu_put_byte(f, len); |
| 837 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 838 | |
| 839 | qemu_put_be32(f, se->instance_id); |
| 840 | qemu_put_be32(f, se->version_id); |
| 841 | |
| 842 | se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 843 | } |
| 844 | |
| 845 | if (qemu_file_has_error(f)) |
| 846 | return -EIO; |
| 847 | |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | int qemu_savevm_state_iterate(QEMUFile *f) |
| 852 | { |
| 853 | SaveStateEntry *se; |
| 854 | int ret = 1; |
| 855 | |
| 856 | for (se = first_se; se != NULL; se = se->next) { |
| 857 | if (se->save_live_state == NULL) |
| 858 | continue; |
| 859 | |
| 860 | /* Section type */ |
| 861 | qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 862 | qemu_put_be32(f, se->section_id); |
| 863 | |
| 864 | ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 865 | } |
| 866 | |
| 867 | if (ret) |
| 868 | return 1; |
| 869 | |
| 870 | if (qemu_file_has_error(f)) |
| 871 | return -EIO; |
| 872 | |
| 873 | return 0; |
| 874 | } |
| 875 | |
| 876 | int qemu_savevm_state_complete(QEMUFile *f) |
| 877 | { |
| 878 | SaveStateEntry *se; |
| 879 | |
| 880 | for (se = first_se; se != NULL; se = se->next) { |
| 881 | if (se->save_live_state == NULL) |
| 882 | continue; |
| 883 | |
| 884 | /* Section type */ |
| 885 | qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 886 | qemu_put_be32(f, se->section_id); |
| 887 | |
| 888 | se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 889 | } |
| 890 | |
| 891 | for(se = first_se; se != NULL; se = se->next) { |
| 892 | int len; |
| 893 | |
| 894 | if (se->save_state == NULL) |
| 895 | continue; |
| 896 | |
| 897 | /* Section type */ |
| 898 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 899 | qemu_put_be32(f, se->section_id); |
| 900 | |
| 901 | /* ID string */ |
| 902 | len = strlen(se->idstr); |
| 903 | qemu_put_byte(f, len); |
| 904 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 905 | |
| 906 | qemu_put_be32(f, se->instance_id); |
| 907 | qemu_put_be32(f, se->version_id); |
| 908 | |
| 909 | se->save_state(f, se->opaque); |
| 910 | } |
| 911 | |
| 912 | qemu_put_byte(f, QEMU_VM_EOF); |
| 913 | |
| 914 | if (qemu_file_has_error(f)) |
| 915 | return -EIO; |
| 916 | |
| 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | int qemu_savevm_state(QEMUFile *f) |
| 921 | { |
| 922 | int saved_vm_running; |
| 923 | int ret; |
| 924 | |
| 925 | saved_vm_running = vm_running; |
| 926 | vm_stop(0); |
| 927 | |
| 928 | bdrv_flush_all(); |
| 929 | |
| 930 | ret = qemu_savevm_state_begin(f); |
| 931 | if (ret < 0) |
| 932 | goto out; |
| 933 | |
| 934 | do { |
| 935 | ret = qemu_savevm_state_iterate(f); |
| 936 | if (ret < 0) |
| 937 | goto out; |
| 938 | } while (ret == 0); |
| 939 | |
| 940 | ret = qemu_savevm_state_complete(f); |
| 941 | |
| 942 | out: |
| 943 | if (qemu_file_has_error(f)) |
| 944 | ret = -EIO; |
| 945 | |
| 946 | if (!ret && saved_vm_running) |
| 947 | vm_start(); |
| 948 | |
| 949 | return ret; |
| 950 | } |
| 951 | |
| 952 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 953 | { |
| 954 | SaveStateEntry *se; |
| 955 | |
| 956 | for(se = first_se; se != NULL; se = se->next) { |
| 957 | if (!strcmp(se->idstr, idstr) && |
| 958 | instance_id == se->instance_id) |
| 959 | return se; |
| 960 | } |
| 961 | return NULL; |
| 962 | } |
| 963 | |
| 964 | typedef struct LoadStateEntry { |
| 965 | SaveStateEntry *se; |
| 966 | int section_id; |
| 967 | int version_id; |
| 968 | struct LoadStateEntry *next; |
| 969 | } LoadStateEntry; |
| 970 | |
| 971 | static int qemu_loadvm_state_v2(QEMUFile *f) |
| 972 | { |
| 973 | SaveStateEntry *se; |
| 974 | int len, ret, instance_id, record_len, version_id; |
| 975 | int64_t total_len, end_pos, cur_pos; |
| 976 | char idstr[256]; |
| 977 | |
| 978 | total_len = qemu_get_be64(f); |
| 979 | end_pos = total_len + qemu_ftell(f); |
| 980 | for(;;) { |
| 981 | if (qemu_ftell(f) >= end_pos) |
| 982 | break; |
| 983 | len = qemu_get_byte(f); |
| 984 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 985 | idstr[len] = '\0'; |
| 986 | instance_id = qemu_get_be32(f); |
| 987 | version_id = qemu_get_be32(f); |
| 988 | record_len = qemu_get_be32(f); |
| 989 | cur_pos = qemu_ftell(f); |
| 990 | se = find_se(idstr, instance_id); |
| 991 | if (!se) { |
| 992 | fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n", |
| 993 | instance_id, idstr); |
| 994 | } else { |
| 995 | ret = se->load_state(f, se->opaque, version_id); |
| 996 | if (ret < 0) { |
| 997 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", |
| 998 | instance_id, idstr); |
| 999 | return ret; |
| 1000 | } |
| 1001 | } |
| 1002 | /* always seek to exact end of record */ |
| 1003 | qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
| 1004 | } |
| 1005 | |
| 1006 | if (qemu_file_has_error(f)) |
| 1007 | return -EIO; |
| 1008 | |
| 1009 | return 0; |
| 1010 | } |
| 1011 | |
| 1012 | int qemu_loadvm_state(QEMUFile *f) |
| 1013 | { |
| 1014 | LoadStateEntry *first_le = NULL; |
| 1015 | uint8_t section_type; |
| 1016 | unsigned int v; |
| 1017 | int ret; |
| 1018 | |
| 1019 | v = qemu_get_be32(f); |
| 1020 | if (v != QEMU_VM_FILE_MAGIC) |
| 1021 | return -EINVAL; |
| 1022 | |
| 1023 | v = qemu_get_be32(f); |
| 1024 | if (v == QEMU_VM_FILE_VERSION_COMPAT) |
| 1025 | return qemu_loadvm_state_v2(f); |
| 1026 | if (v != QEMU_VM_FILE_VERSION) |
| 1027 | return -ENOTSUP; |
| 1028 | |
| 1029 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { |
| 1030 | uint32_t instance_id, version_id, section_id; |
| 1031 | LoadStateEntry *le; |
| 1032 | SaveStateEntry *se; |
| 1033 | char idstr[257]; |
| 1034 | int len; |
| 1035 | |
| 1036 | switch (section_type) { |
| 1037 | case QEMU_VM_SECTION_START: |
| 1038 | case QEMU_VM_SECTION_FULL: |
| 1039 | /* Read section start */ |
| 1040 | section_id = qemu_get_be32(f); |
| 1041 | len = qemu_get_byte(f); |
| 1042 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 1043 | idstr[len] = 0; |
| 1044 | instance_id = qemu_get_be32(f); |
| 1045 | version_id = qemu_get_be32(f); |
| 1046 | |
| 1047 | /* Find savevm section */ |
| 1048 | se = find_se(idstr, instance_id); |
| 1049 | if (se == NULL) { |
| 1050 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); |
| 1051 | ret = -EINVAL; |
| 1052 | goto out; |
| 1053 | } |
| 1054 | |
| 1055 | /* Validate version */ |
| 1056 | if (version_id > se->version_id) { |
| 1057 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", |
| 1058 | version_id, idstr, se->version_id); |
| 1059 | ret = -EINVAL; |
| 1060 | goto out; |
| 1061 | } |
| 1062 | |
| 1063 | /* Add entry */ |
| 1064 | le = qemu_mallocz(sizeof(*le)); |
| 1065 | |
| 1066 | le->se = se; |
| 1067 | le->section_id = section_id; |
| 1068 | le->version_id = version_id; |
| 1069 | le->next = first_le; |
| 1070 | first_le = le; |
| 1071 | |
| 1072 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 1073 | break; |
| 1074 | case QEMU_VM_SECTION_PART: |
| 1075 | case QEMU_VM_SECTION_END: |
| 1076 | section_id = qemu_get_be32(f); |
| 1077 | |
| 1078 | for (le = first_le; le && le->section_id != section_id; le = le->next); |
| 1079 | if (le == NULL) { |
| 1080 | fprintf(stderr, "Unknown savevm section %d\n", section_id); |
| 1081 | ret = -EINVAL; |
| 1082 | goto out; |
| 1083 | } |
| 1084 | |
| 1085 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 1086 | break; |
| 1087 | default: |
| 1088 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); |
| 1089 | ret = -EINVAL; |
| 1090 | goto out; |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | ret = 0; |
| 1095 | |
| 1096 | out: |
| 1097 | while (first_le) { |
| 1098 | LoadStateEntry *le = first_le; |
| 1099 | first_le = first_le->next; |
| 1100 | qemu_free(le); |
| 1101 | } |
| 1102 | |
| 1103 | if (qemu_file_has_error(f)) |
| 1104 | ret = -EIO; |
| 1105 | |
| 1106 | return ret; |
| 1107 | } |
| 1108 | |
| 1109 | /* device can contain snapshots */ |
| 1110 | static int bdrv_can_snapshot(BlockDriverState *bs) |
| 1111 | { |
| 1112 | return (bs && |
| 1113 | !bdrv_is_removable(bs) && |
| 1114 | !bdrv_is_read_only(bs)); |
| 1115 | } |
| 1116 | |
| 1117 | /* device must be snapshots in order to have a reliable snapshot */ |
| 1118 | static int bdrv_has_snapshot(BlockDriverState *bs) |
| 1119 | { |
| 1120 | return (bs && |
| 1121 | !bdrv_is_removable(bs) && |
| 1122 | !bdrv_is_read_only(bs)); |
| 1123 | } |
| 1124 | |
| 1125 | static BlockDriverState *get_bs_snapshots(void) |
| 1126 | { |
| 1127 | BlockDriverState *bs; |
| 1128 | int i; |
| 1129 | |
| 1130 | if (bs_snapshots) |
| 1131 | return bs_snapshots; |
| 1132 | for(i = 0; i <= nb_drives; i++) { |
| 1133 | bs = drives_table[i].bdrv; |
| 1134 | if (bdrv_can_snapshot(bs)) |
| 1135 | goto ok; |
| 1136 | } |
| 1137 | return NULL; |
| 1138 | ok: |
| 1139 | bs_snapshots = bs; |
| 1140 | return bs; |
| 1141 | } |
| 1142 | |
| 1143 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 1144 | const char *name) |
| 1145 | { |
| 1146 | QEMUSnapshotInfo *sn_tab, *sn; |
| 1147 | int nb_sns, i, ret; |
| 1148 | |
| 1149 | ret = -ENOENT; |
| 1150 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1151 | if (nb_sns < 0) |
| 1152 | return ret; |
| 1153 | for(i = 0; i < nb_sns; i++) { |
| 1154 | sn = &sn_tab[i]; |
| 1155 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { |
| 1156 | *sn_info = *sn; |
| 1157 | ret = 0; |
| 1158 | break; |
| 1159 | } |
| 1160 | } |
| 1161 | qemu_free(sn_tab); |
| 1162 | return ret; |
| 1163 | } |
| 1164 | |
| 1165 | void do_savevm(Monitor *mon, const char *name) |
| 1166 | { |
| 1167 | BlockDriverState *bs, *bs1; |
| 1168 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1169 | int must_delete, ret, i; |
| 1170 | BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1171 | QEMUFile *f; |
| 1172 | int saved_vm_running; |
| 1173 | uint32_t vm_state_size; |
| 1174 | #ifdef _WIN32 |
| 1175 | struct _timeb tb; |
| 1176 | #else |
| 1177 | struct timeval tv; |
| 1178 | #endif |
| 1179 | |
| 1180 | bs = get_bs_snapshots(); |
| 1181 | if (!bs) { |
| 1182 | monitor_printf(mon, "No block device can accept snapshots\n"); |
| 1183 | return; |
| 1184 | } |
| 1185 | |
| 1186 | /* ??? Should this occur after vm_stop? */ |
| 1187 | qemu_aio_flush(); |
| 1188 | |
| 1189 | saved_vm_running = vm_running; |
| 1190 | vm_stop(0); |
| 1191 | |
| 1192 | must_delete = 0; |
| 1193 | if (name) { |
| 1194 | ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1195 | if (ret >= 0) { |
| 1196 | must_delete = 1; |
| 1197 | } |
| 1198 | } |
| 1199 | memset(sn, 0, sizeof(*sn)); |
| 1200 | if (must_delete) { |
| 1201 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); |
| 1202 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); |
| 1203 | } else { |
| 1204 | if (name) |
| 1205 | pstrcpy(sn->name, sizeof(sn->name), name); |
| 1206 | } |
| 1207 | |
| 1208 | /* fill auxiliary fields */ |
| 1209 | #ifdef _WIN32 |
| 1210 | _ftime(&tb); |
| 1211 | sn->date_sec = tb.time; |
| 1212 | sn->date_nsec = tb.millitm * 1000000; |
| 1213 | #else |
| 1214 | gettimeofday(&tv, NULL); |
| 1215 | sn->date_sec = tv.tv_sec; |
| 1216 | sn->date_nsec = tv.tv_usec * 1000; |
| 1217 | #endif |
| 1218 | sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1219 | |
| 1220 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1221 | monitor_printf(mon, "Device %s does not support VM state snapshots\n", |
| 1222 | bdrv_get_device_name(bs)); |
| 1223 | goto the_end; |
| 1224 | } |
| 1225 | |
| 1226 | /* save the VM state */ |
| 1227 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1); |
| 1228 | if (!f) { |
| 1229 | monitor_printf(mon, "Could not open VM state file\n"); |
| 1230 | goto the_end; |
| 1231 | } |
| 1232 | ret = qemu_savevm_state(f); |
| 1233 | vm_state_size = qemu_ftell(f); |
| 1234 | qemu_fclose(f); |
| 1235 | if (ret < 0) { |
| 1236 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
| 1237 | goto the_end; |
| 1238 | } |
| 1239 | |
| 1240 | /* create the snapshots */ |
| 1241 | |
| 1242 | for(i = 0; i < nb_drives; i++) { |
| 1243 | bs1 = drives_table[i].bdrv; |
| 1244 | if (bdrv_has_snapshot(bs1)) { |
| 1245 | if (must_delete) { |
| 1246 | ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
| 1247 | if (ret < 0) { |
| 1248 | monitor_printf(mon, |
| 1249 | "Error while deleting snapshot on '%s'\n", |
| 1250 | bdrv_get_device_name(bs1)); |
| 1251 | } |
| 1252 | } |
| 1253 | /* Write VM state size only to the image that contains the state */ |
| 1254 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); |
| 1255 | ret = bdrv_snapshot_create(bs1, sn); |
| 1256 | if (ret < 0) { |
| 1257 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
| 1258 | bdrv_get_device_name(bs1)); |
| 1259 | } |
| 1260 | } |
| 1261 | } |
| 1262 | |
| 1263 | the_end: |
| 1264 | if (saved_vm_running) |
| 1265 | vm_start(); |
| 1266 | } |
| 1267 | |
| 1268 | void do_loadvm(Monitor *mon, const char *name) |
| 1269 | { |
| 1270 | BlockDriverState *bs, *bs1; |
| 1271 | BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1272 | QEMUSnapshotInfo sn; |
| 1273 | QEMUFile *f; |
| 1274 | int i, ret; |
| 1275 | int saved_vm_running; |
| 1276 | |
| 1277 | bs = get_bs_snapshots(); |
| 1278 | if (!bs) { |
| 1279 | monitor_printf(mon, "No block device supports snapshots\n"); |
| 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | /* Flush all IO requests so they don't interfere with the new state. */ |
| 1284 | qemu_aio_flush(); |
| 1285 | |
| 1286 | saved_vm_running = vm_running; |
| 1287 | vm_stop(0); |
| 1288 | |
| 1289 | for(i = 0; i <= nb_drives; i++) { |
| 1290 | bs1 = drives_table[i].bdrv; |
| 1291 | if (bdrv_has_snapshot(bs1)) { |
| 1292 | ret = bdrv_snapshot_goto(bs1, name); |
| 1293 | if (ret < 0) { |
| 1294 | if (bs != bs1) |
| 1295 | monitor_printf(mon, "Warning: "); |
| 1296 | switch(ret) { |
| 1297 | case -ENOTSUP: |
| 1298 | monitor_printf(mon, |
| 1299 | "Snapshots not supported on device '%s'\n", |
| 1300 | bdrv_get_device_name(bs1)); |
| 1301 | break; |
| 1302 | case -ENOENT: |
| 1303 | monitor_printf(mon, "Could not find snapshot '%s' on " |
| 1304 | "device '%s'\n", |
| 1305 | name, bdrv_get_device_name(bs1)); |
| 1306 | break; |
| 1307 | default: |
| 1308 | monitor_printf(mon, "Error %d while activating snapshot on" |
| 1309 | " '%s'\n", ret, bdrv_get_device_name(bs1)); |
| 1310 | break; |
| 1311 | } |
| 1312 | /* fatal on snapshot block device */ |
| 1313 | if (bs == bs1) |
| 1314 | goto the_end; |
| 1315 | } |
| 1316 | } |
| 1317 | } |
| 1318 | |
| 1319 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1320 | monitor_printf(mon, "Device %s does not support VM state snapshots\n", |
| 1321 | bdrv_get_device_name(bs)); |
| 1322 | return; |
| 1323 | } |
| 1324 | |
| 1325 | /* Don't even try to load empty VM states */ |
| 1326 | ret = bdrv_snapshot_find(bs, &sn, name); |
| 1327 | if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1328 | goto the_end; |
| 1329 | |
| 1330 | /* restore the VM state */ |
| 1331 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0); |
| 1332 | if (!f) { |
| 1333 | monitor_printf(mon, "Could not open VM state file\n"); |
| 1334 | goto the_end; |
| 1335 | } |
| 1336 | ret = qemu_loadvm_state(f); |
| 1337 | qemu_fclose(f); |
| 1338 | if (ret < 0) { |
| 1339 | monitor_printf(mon, "Error %d while loading VM state\n", ret); |
| 1340 | } |
| 1341 | the_end: |
| 1342 | if (saved_vm_running) |
| 1343 | vm_start(); |
| 1344 | } |
| 1345 | |
| 1346 | void do_delvm(Monitor *mon, const char *name) |
| 1347 | { |
| 1348 | BlockDriverState *bs, *bs1; |
| 1349 | int i, ret; |
| 1350 | |
| 1351 | bs = get_bs_snapshots(); |
| 1352 | if (!bs) { |
| 1353 | monitor_printf(mon, "No block device supports snapshots\n"); |
| 1354 | return; |
| 1355 | } |
| 1356 | |
| 1357 | for(i = 0; i <= nb_drives; i++) { |
| 1358 | bs1 = drives_table[i].bdrv; |
| 1359 | if (bdrv_has_snapshot(bs1)) { |
| 1360 | ret = bdrv_snapshot_delete(bs1, name); |
| 1361 | if (ret < 0) { |
| 1362 | if (ret == -ENOTSUP) |
| 1363 | monitor_printf(mon, |
| 1364 | "Snapshots not supported on device '%s'\n", |
| 1365 | bdrv_get_device_name(bs1)); |
| 1366 | else |
| 1367 | monitor_printf(mon, "Error %d while deleting snapshot on " |
| 1368 | "'%s'\n", ret, bdrv_get_device_name(bs1)); |
| 1369 | } |
| 1370 | } |
| 1371 | } |
| 1372 | } |
| 1373 | |
| 1374 | void do_info_snapshots(Monitor *mon) |
| 1375 | { |
| 1376 | BlockDriverState *bs, *bs1; |
| 1377 | QEMUSnapshotInfo *sn_tab, *sn; |
| 1378 | int nb_sns, i; |
| 1379 | char buf[256]; |
| 1380 | |
| 1381 | bs = get_bs_snapshots(); |
| 1382 | if (!bs) { |
| 1383 | monitor_printf(mon, "No available block device supports snapshots\n"); |
| 1384 | return; |
| 1385 | } |
| 1386 | monitor_printf(mon, "Snapshot devices:"); |
| 1387 | for(i = 0; i <= nb_drives; i++) { |
| 1388 | bs1 = drives_table[i].bdrv; |
| 1389 | if (bdrv_has_snapshot(bs1)) { |
| 1390 | if (bs == bs1) |
| 1391 | monitor_printf(mon, " %s", bdrv_get_device_name(bs1)); |
| 1392 | } |
| 1393 | } |
| 1394 | monitor_printf(mon, "\n"); |
| 1395 | |
| 1396 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1397 | if (nb_sns < 0) { |
| 1398 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
| 1399 | return; |
| 1400 | } |
| 1401 | monitor_printf(mon, "Snapshot list (from %s):\n", |
| 1402 | bdrv_get_device_name(bs)); |
| 1403 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1404 | for(i = 0; i < nb_sns; i++) { |
| 1405 | sn = &sn_tab[i]; |
| 1406 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1407 | } |
| 1408 | qemu_free(sn_tab); |
| 1409 | } |