aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [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 "qemu-common.h" |
| 25 | #include "hw/hw.h" |
| 26 | #include "net.h" |
| 27 | #include "console.h" |
| 28 | #include "sysemu.h" |
| 29 | #include "qemu-timer.h" |
| 30 | #include "qemu-char.h" |
| 31 | #include "block.h" |
| 32 | #include "audio/audio.h" |
| 33 | #include "migration.h" |
| 34 | #include "qemu_socket.h" |
| 35 | |
| 36 | #include <unistd.h> |
| 37 | #include <fcntl.h> |
| 38 | #include <signal.h> |
| 39 | #include <time.h> |
| 40 | #include <errno.h> |
| 41 | #include <sys/time.h> |
| 42 | #include <zlib.h> |
| 43 | |
| 44 | #ifndef _WIN32 |
| 45 | #include <sys/times.h> |
| 46 | #include <sys/wait.h> |
| 47 | #include <termios.h> |
| 48 | #include <sys/mman.h> |
| 49 | #include <sys/ioctl.h> |
| 50 | #include <sys/resource.h> |
| 51 | #include <sys/socket.h> |
| 52 | #include <netinet/in.h> |
| 53 | #include <net/if.h> |
| 54 | #if defined(__NetBSD__) |
| 55 | #include <net/if_tap.h> |
| 56 | #endif |
| 57 | #ifdef __linux__ |
| 58 | #include <linux/if_tun.h> |
| 59 | #endif |
| 60 | #include <arpa/inet.h> |
| 61 | #include <dirent.h> |
| 62 | #include <netdb.h> |
| 63 | #include <sys/select.h> |
| 64 | #ifdef _BSD |
| 65 | #include <sys/stat.h> |
| 66 | #ifdef __FreeBSD__ |
| 67 | #include <libutil.h> |
| 68 | #else |
| 69 | #include <util.h> |
| 70 | #endif |
| 71 | #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__) |
| 72 | #include <freebsd/stdlib.h> |
| 73 | #else |
| 74 | #ifdef __linux__ |
| 75 | #include <pty.h> |
| 76 | #include <malloc.h> |
| 77 | #include <linux/rtc.h> |
| 78 | #endif |
| 79 | #endif |
| 80 | #endif |
| 81 | |
| 82 | #ifdef _WIN32 |
| 83 | #include <malloc.h> |
| 84 | #include <sys/timeb.h> |
| 85 | #include <mmsystem.h> |
| 86 | #define getopt_long_only getopt_long |
| 87 | #define memalign(align, size) malloc(size) |
| 88 | #endif |
| 89 | |
| 90 | /* point to the block driver where the snapshots are managed */ |
| 91 | static BlockDriverState *bs_snapshots; |
| 92 | |
| 93 | #define SELF_ANNOUNCE_ROUNDS 5 |
| 94 | #define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
| 95 | //#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */ |
| 96 | #define EXPERIMENTAL_MAGIC 0xf1f23f4f |
| 97 | |
| 98 | static int announce_self_create(uint8_t *buf, |
| 99 | uint8_t *mac_addr) |
| 100 | { |
| 101 | uint32_t magic = EXPERIMENTAL_MAGIC; |
| 102 | uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
| 103 | |
| 104 | /* FIXME: should we send a different packet (arp/rarp/ping)? */ |
| 105 | |
| 106 | memset(buf, 0xff, 6); /* h_dst */ |
| 107 | memcpy(buf + 6, mac_addr, 6); /* h_src */ |
| 108 | memcpy(buf + 12, &proto, 2); /* h_proto */ |
| 109 | memcpy(buf + 14, &magic, 4); /* magic */ |
| 110 | |
| 111 | return 18; /* len */ |
| 112 | } |
| 113 | |
| 114 | void qemu_announce_self(void) |
| 115 | { |
| 116 | int i, j, len; |
| 117 | VLANState *vlan; |
| 118 | VLANClientState *vc; |
| 119 | uint8_t buf[256]; |
| 120 | |
| 121 | for (i = 0; i < nb_nics; i++) { |
| 122 | len = announce_self_create(buf, nd_table[i].macaddr); |
| 123 | vlan = nd_table[i].vlan; |
| 124 | for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
| 125 | for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++) |
| 126 | vc->fd_read(vc->opaque, buf, len); |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /***********************************************************/ |
| 132 | /* savevm/loadvm support */ |
| 133 | |
| 134 | #define IO_BUF_SIZE 32768 |
| 135 | |
| 136 | struct QEMUFile { |
| 137 | QEMUFilePutBufferFunc *put_buffer; |
| 138 | QEMUFileGetBufferFunc *get_buffer; |
| 139 | QEMUFileCloseFunc *close; |
| 140 | QEMUFileRateLimit *rate_limit; |
| 141 | void *opaque; |
| 142 | int is_write; |
| 143 | |
| 144 | int64_t buf_offset; /* start of buffer when writing, end of buffer |
| 145 | when reading */ |
| 146 | int buf_index; |
| 147 | int buf_size; /* 0 when writing */ |
| 148 | uint8_t buf[IO_BUF_SIZE]; |
| 149 | |
| 150 | int has_error; |
| 151 | }; |
| 152 | |
| 153 | typedef struct QEMUFilePopen |
| 154 | { |
| 155 | FILE *popen_file; |
| 156 | QEMUFile *file; |
| 157 | } QEMUFilePopen; |
| 158 | |
| 159 | typedef struct QEMUFileSocket |
| 160 | { |
| 161 | int fd; |
| 162 | QEMUFile *file; |
| 163 | } QEMUFileSocket; |
| 164 | |
| 165 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 166 | { |
| 167 | QEMUFileSocket *s = opaque; |
| 168 | ssize_t len; |
| 169 | |
| 170 | do { |
| 171 | len = recv(s->fd, buf, size, 0); |
| 172 | } while (len == -1 && socket_error() == EINTR); |
| 173 | |
| 174 | if (len == -1) |
| 175 | len = -socket_error(); |
| 176 | |
| 177 | return len; |
| 178 | } |
| 179 | |
| 180 | static int socket_close(void *opaque) |
| 181 | { |
| 182 | QEMUFileSocket *s = opaque; |
| 183 | qemu_free(s); |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
| 188 | { |
| 189 | QEMUFilePopen *s = opaque; |
| 190 | return fwrite(buf, 1, size, s->popen_file); |
| 191 | } |
| 192 | |
| 193 | static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 194 | { |
| 195 | QEMUFilePopen *s = opaque; |
| 196 | return fread(buf, 1, size, s->popen_file); |
| 197 | } |
| 198 | |
| 199 | static int popen_close(void *opaque) |
| 200 | { |
| 201 | QEMUFilePopen *s = opaque; |
| 202 | pclose(s->popen_file); |
| 203 | qemu_free(s); |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
| 208 | { |
| 209 | QEMUFilePopen *s; |
| 210 | |
| 211 | if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 212 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
| 213 | return NULL; |
| 214 | } |
| 215 | |
| 216 | s = qemu_mallocz(sizeof(QEMUFilePopen)); |
| 217 | if (!s) { |
| 218 | fprintf(stderr, "qemu_popen: malloc failed\n"); |
| 219 | return NULL; |
| 220 | } |
| 221 | |
| 222 | s->popen_file = popen_file; |
| 223 | |
| 224 | if(mode[0] == 'r') { |
| 225 | s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL); |
| 226 | } else { |
| 227 | s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL); |
| 228 | } |
| 229 | fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n"); |
| 230 | return s->file; |
| 231 | } |
| 232 | |
| 233 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 234 | { |
| 235 | FILE *popen_file; |
| 236 | |
| 237 | popen_file = popen(command, mode); |
| 238 | if(popen_file == NULL) { |
| 239 | return NULL; |
| 240 | } |
| 241 | |
| 242 | return qemu_popen(popen_file, mode); |
| 243 | } |
| 244 | |
| 245 | QEMUFile *qemu_fopen_socket(int fd) |
| 246 | { |
| 247 | QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket)); |
| 248 | |
| 249 | if (s == NULL) |
| 250 | return NULL; |
| 251 | |
| 252 | s->fd = fd; |
| 253 | s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL); |
| 254 | return s->file; |
| 255 | } |
| 256 | |
| 257 | typedef struct QEMUFileStdio |
| 258 | { |
| 259 | FILE *outfile; |
| 260 | } QEMUFileStdio; |
| 261 | |
| 262 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 263 | int64_t pos, int size) |
| 264 | { |
| 265 | QEMUFileStdio *s = opaque; |
| 266 | fseek(s->outfile, pos, SEEK_SET); |
| 267 | fwrite(buf, 1, size, s->outfile); |
| 268 | return size; |
| 269 | } |
| 270 | |
| 271 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 272 | { |
| 273 | QEMUFileStdio *s = opaque; |
| 274 | fseek(s->outfile, pos, SEEK_SET); |
| 275 | return fread(buf, 1, size, s->outfile); |
| 276 | } |
| 277 | |
| 278 | static int file_close(void *opaque) |
| 279 | { |
| 280 | QEMUFileStdio *s = opaque; |
| 281 | fclose(s->outfile); |
| 282 | qemu_free(s); |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 287 | { |
| 288 | QEMUFileStdio *s; |
| 289 | |
| 290 | s = qemu_mallocz(sizeof(QEMUFileStdio)); |
| 291 | if (!s) |
| 292 | return NULL; |
| 293 | |
| 294 | s->outfile = fopen(filename, mode); |
| 295 | if (!s->outfile) |
| 296 | goto fail; |
| 297 | |
| 298 | if (!strcmp(mode, "wb")) |
| 299 | return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL); |
| 300 | else if (!strcmp(mode, "rb")) |
| 301 | return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL); |
| 302 | |
| 303 | fail: |
| 304 | if (s->outfile) |
| 305 | fclose(s->outfile); |
| 306 | qemu_free(s); |
| 307 | return NULL; |
| 308 | } |
| 309 | |
| 310 | typedef struct QEMUFileBdrv |
| 311 | { |
| 312 | BlockDriverState *bs; |
| 313 | int64_t base_offset; |
| 314 | } QEMUFileBdrv; |
| 315 | |
| 316 | static int bdrv_put_buffer(void *opaque, const uint8_t *buf, |
| 317 | int64_t pos, int size) |
| 318 | { |
| 319 | QEMUFileBdrv *s = opaque; |
| 320 | bdrv_pwrite(s->bs, s->base_offset + pos, buf, size); |
| 321 | return size; |
| 322 | } |
| 323 | |
| 324 | static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 325 | { |
| 326 | QEMUFileBdrv *s = opaque; |
| 327 | return bdrv_pread(s->bs, s->base_offset + pos, buf, size); |
| 328 | } |
| 329 | |
| 330 | static int bdrv_fclose(void *opaque) |
| 331 | { |
| 332 | QEMUFileBdrv *s = opaque; |
| 333 | qemu_free(s); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
| 338 | { |
| 339 | QEMUFileBdrv *s; |
| 340 | |
| 341 | s = qemu_mallocz(sizeof(QEMUFileBdrv)); |
| 342 | if (!s) |
| 343 | return NULL; |
| 344 | |
| 345 | s->bs = bs; |
| 346 | s->base_offset = offset; |
| 347 | |
| 348 | if (is_writable) |
| 349 | return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL); |
| 350 | |
| 351 | return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL); |
| 352 | } |
| 353 | |
| 354 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, |
| 355 | QEMUFileGetBufferFunc *get_buffer, |
| 356 | QEMUFileCloseFunc *close, |
| 357 | QEMUFileRateLimit *rate_limit) |
| 358 | { |
| 359 | QEMUFile *f; |
| 360 | |
| 361 | f = qemu_mallocz(sizeof(QEMUFile)); |
| 362 | if (!f) |
| 363 | return NULL; |
| 364 | |
| 365 | f->opaque = opaque; |
| 366 | f->put_buffer = put_buffer; |
| 367 | f->get_buffer = get_buffer; |
| 368 | f->close = close; |
| 369 | f->rate_limit = rate_limit; |
| 370 | f->is_write = 0; |
| 371 | |
| 372 | return f; |
| 373 | } |
| 374 | |
| 375 | int qemu_file_has_error(QEMUFile *f) |
| 376 | { |
| 377 | return f->has_error; |
| 378 | } |
| 379 | |
| 380 | void qemu_fflush(QEMUFile *f) |
| 381 | { |
| 382 | if (!f->put_buffer) |
| 383 | return; |
| 384 | |
| 385 | if (f->is_write && f->buf_index > 0) { |
| 386 | int len; |
| 387 | |
| 388 | len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 389 | if (len > 0) |
| 390 | f->buf_offset += f->buf_index; |
| 391 | else |
| 392 | f->has_error = 1; |
| 393 | f->buf_index = 0; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | static void qemu_fill_buffer(QEMUFile *f) |
| 398 | { |
| 399 | int len; |
| 400 | |
| 401 | if (!f->get_buffer) |
| 402 | return; |
| 403 | |
| 404 | if (f->is_write) |
| 405 | abort(); |
| 406 | |
| 407 | len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 408 | if (len > 0) { |
| 409 | f->buf_index = 0; |
| 410 | f->buf_size = len; |
| 411 | f->buf_offset += len; |
| 412 | } else if (len != -EAGAIN) |
| 413 | f->has_error = 1; |
| 414 | } |
| 415 | |
| 416 | int qemu_fclose(QEMUFile *f) |
| 417 | { |
| 418 | int ret = 0; |
| 419 | qemu_fflush(f); |
| 420 | if (f->close) |
| 421 | ret = f->close(f->opaque); |
| 422 | qemu_free(f); |
| 423 | return ret; |
| 424 | } |
| 425 | |
| 426 | void qemu_file_put_notify(QEMUFile *f) |
| 427 | { |
| 428 | f->put_buffer(f->opaque, NULL, 0, 0); |
| 429 | } |
| 430 | |
| 431 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 432 | { |
| 433 | int l; |
| 434 | |
| 435 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 436 | fprintf(stderr, |
| 437 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 438 | abort(); |
| 439 | } |
| 440 | |
| 441 | while (!f->has_error && size > 0) { |
| 442 | l = IO_BUF_SIZE - f->buf_index; |
| 443 | if (l > size) |
| 444 | l = size; |
| 445 | memcpy(f->buf + f->buf_index, buf, l); |
| 446 | f->is_write = 1; |
| 447 | f->buf_index += l; |
| 448 | buf += l; |
| 449 | size -= l; |
| 450 | if (f->buf_index >= IO_BUF_SIZE) |
| 451 | qemu_fflush(f); |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | void qemu_put_byte(QEMUFile *f, int v) |
| 456 | { |
| 457 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 458 | fprintf(stderr, |
| 459 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 460 | abort(); |
| 461 | } |
| 462 | |
| 463 | f->buf[f->buf_index++] = v; |
| 464 | f->is_write = 1; |
| 465 | if (f->buf_index >= IO_BUF_SIZE) |
| 466 | qemu_fflush(f); |
| 467 | } |
| 468 | |
| 469 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 470 | { |
| 471 | int size, l; |
| 472 | |
| 473 | if (f->is_write) |
| 474 | abort(); |
| 475 | |
| 476 | size = size1; |
| 477 | while (size > 0) { |
| 478 | l = f->buf_size - f->buf_index; |
| 479 | if (l == 0) { |
| 480 | qemu_fill_buffer(f); |
| 481 | l = f->buf_size - f->buf_index; |
| 482 | if (l == 0) |
| 483 | break; |
| 484 | } |
| 485 | if (l > size) |
| 486 | l = size; |
| 487 | memcpy(buf, f->buf + f->buf_index, l); |
| 488 | f->buf_index += l; |
| 489 | buf += l; |
| 490 | size -= l; |
| 491 | } |
| 492 | return size1 - size; |
| 493 | } |
| 494 | |
| 495 | int qemu_get_byte(QEMUFile *f) |
| 496 | { |
| 497 | if (f->is_write) |
| 498 | abort(); |
| 499 | |
| 500 | if (f->buf_index >= f->buf_size) { |
| 501 | qemu_fill_buffer(f); |
| 502 | if (f->buf_index >= f->buf_size) |
| 503 | return 0; |
| 504 | } |
| 505 | return f->buf[f->buf_index++]; |
| 506 | } |
| 507 | |
| 508 | int64_t qemu_ftell(QEMUFile *f) |
| 509 | { |
| 510 | return f->buf_offset - f->buf_size + f->buf_index; |
| 511 | } |
| 512 | |
| 513 | int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence) |
| 514 | { |
| 515 | if (whence == SEEK_SET) { |
| 516 | /* nothing to do */ |
| 517 | } else if (whence == SEEK_CUR) { |
| 518 | pos += qemu_ftell(f); |
| 519 | } else { |
| 520 | /* SEEK_END not supported */ |
| 521 | return -1; |
| 522 | } |
| 523 | if (f->put_buffer) { |
| 524 | qemu_fflush(f); |
| 525 | f->buf_offset = pos; |
| 526 | } else { |
| 527 | f->buf_offset = pos; |
| 528 | f->buf_index = 0; |
| 529 | f->buf_size = 0; |
| 530 | } |
| 531 | return pos; |
| 532 | } |
| 533 | |
| 534 | int qemu_file_rate_limit(QEMUFile *f) |
| 535 | { |
| 536 | if (f->rate_limit) |
| 537 | return f->rate_limit(f->opaque); |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 543 | { |
| 544 | qemu_put_byte(f, v >> 8); |
| 545 | qemu_put_byte(f, v); |
| 546 | } |
| 547 | |
| 548 | void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 549 | { |
| 550 | qemu_put_byte(f, v >> 24); |
| 551 | qemu_put_byte(f, v >> 16); |
| 552 | qemu_put_byte(f, v >> 8); |
| 553 | qemu_put_byte(f, v); |
| 554 | } |
| 555 | |
| 556 | void qemu_put_be64(QEMUFile *f, uint64_t v) |
| 557 | { |
| 558 | qemu_put_be32(f, v >> 32); |
| 559 | qemu_put_be32(f, v); |
| 560 | } |
| 561 | |
| 562 | unsigned int qemu_get_be16(QEMUFile *f) |
| 563 | { |
| 564 | unsigned int v; |
| 565 | v = qemu_get_byte(f) << 8; |
| 566 | v |= qemu_get_byte(f); |
| 567 | return v; |
| 568 | } |
| 569 | |
| 570 | unsigned int qemu_get_be32(QEMUFile *f) |
| 571 | { |
| 572 | unsigned int v; |
| 573 | v = qemu_get_byte(f) << 24; |
| 574 | v |= qemu_get_byte(f) << 16; |
| 575 | v |= qemu_get_byte(f) << 8; |
| 576 | v |= qemu_get_byte(f); |
| 577 | return v; |
| 578 | } |
| 579 | |
| 580 | uint64_t qemu_get_be64(QEMUFile *f) |
| 581 | { |
| 582 | uint64_t v; |
| 583 | v = (uint64_t)qemu_get_be32(f) << 32; |
| 584 | v |= qemu_get_be32(f); |
| 585 | return v; |
| 586 | } |
| 587 | |
| 588 | typedef struct SaveStateEntry { |
| 589 | char idstr[256]; |
| 590 | int instance_id; |
| 591 | int version_id; |
| 592 | int section_id; |
| 593 | SaveLiveStateHandler *save_live_state; |
| 594 | SaveStateHandler *save_state; |
| 595 | LoadStateHandler *load_state; |
| 596 | void *opaque; |
| 597 | struct SaveStateEntry *next; |
| 598 | } SaveStateEntry; |
| 599 | |
| 600 | static SaveStateEntry *first_se; |
| 601 | |
| 602 | /* TODO: Individual devices generally have very little idea about the rest |
| 603 | of the system, so instance_id should be removed/replaced. |
| 604 | Meanwhile pass -1 as instance_id if you do not already have a clearly |
| 605 | distinguishing id for all instances of your device class. */ |
| 606 | int register_savevm_live(const char *idstr, |
| 607 | int instance_id, |
| 608 | int version_id, |
| 609 | SaveLiveStateHandler *save_live_state, |
| 610 | SaveStateHandler *save_state, |
| 611 | LoadStateHandler *load_state, |
| 612 | void *opaque) |
| 613 | { |
| 614 | SaveStateEntry *se, **pse; |
| 615 | static int global_section_id; |
| 616 | |
| 617 | se = qemu_malloc(sizeof(SaveStateEntry)); |
| 618 | if (!se) |
| 619 | return -1; |
| 620 | pstrcpy(se->idstr, sizeof(se->idstr), idstr); |
| 621 | se->instance_id = (instance_id == -1) ? 0 : instance_id; |
| 622 | se->version_id = version_id; |
| 623 | se->section_id = global_section_id++; |
| 624 | se->save_live_state = save_live_state; |
| 625 | se->save_state = save_state; |
| 626 | se->load_state = load_state; |
| 627 | se->opaque = opaque; |
| 628 | se->next = NULL; |
| 629 | |
| 630 | /* add at the end of list */ |
| 631 | pse = &first_se; |
| 632 | while (*pse != NULL) { |
| 633 | if (instance_id == -1 |
| 634 | && strcmp(se->idstr, (*pse)->idstr) == 0 |
| 635 | && se->instance_id <= (*pse)->instance_id) |
| 636 | se->instance_id = (*pse)->instance_id + 1; |
| 637 | pse = &(*pse)->next; |
| 638 | } |
| 639 | *pse = se; |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | int register_savevm(const char *idstr, |
| 644 | int instance_id, |
| 645 | int version_id, |
| 646 | SaveStateHandler *save_state, |
| 647 | LoadStateHandler *load_state, |
| 648 | void *opaque) |
| 649 | { |
| 650 | return register_savevm_live(idstr, instance_id, version_id, |
| 651 | NULL, save_state, load_state, opaque); |
| 652 | } |
| 653 | |
| 654 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
| 655 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 656 | #define QEMU_VM_FILE_VERSION 0x00000003 |
| 657 | |
| 658 | #define QEMU_VM_EOF 0x00 |
| 659 | #define QEMU_VM_SECTION_START 0x01 |
| 660 | #define QEMU_VM_SECTION_PART 0x02 |
| 661 | #define QEMU_VM_SECTION_END 0x03 |
| 662 | #define QEMU_VM_SECTION_FULL 0x04 |
| 663 | |
| 664 | int qemu_savevm_state_begin(QEMUFile *f) |
| 665 | { |
| 666 | SaveStateEntry *se; |
| 667 | |
| 668 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 669 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 670 | |
| 671 | for (se = first_se; se != NULL; se = se->next) { |
| 672 | int len; |
| 673 | |
| 674 | if (se->save_live_state == NULL) |
| 675 | continue; |
| 676 | |
| 677 | /* Section type */ |
| 678 | qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 679 | qemu_put_be32(f, se->section_id); |
| 680 | |
| 681 | /* ID string */ |
| 682 | len = strlen(se->idstr); |
| 683 | qemu_put_byte(f, len); |
| 684 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 685 | |
| 686 | qemu_put_be32(f, se->instance_id); |
| 687 | qemu_put_be32(f, se->version_id); |
| 688 | |
| 689 | se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 690 | } |
| 691 | |
| 692 | if (qemu_file_has_error(f)) |
| 693 | return -EIO; |
| 694 | |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | int qemu_savevm_state_iterate(QEMUFile *f) |
| 699 | { |
| 700 | SaveStateEntry *se; |
| 701 | int ret = 1; |
| 702 | |
| 703 | for (se = first_se; se != NULL; se = se->next) { |
| 704 | if (se->save_live_state == NULL) |
| 705 | continue; |
| 706 | |
| 707 | /* Section type */ |
| 708 | qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 709 | qemu_put_be32(f, se->section_id); |
| 710 | |
| 711 | ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 712 | } |
| 713 | |
| 714 | if (ret) |
| 715 | return 1; |
| 716 | |
| 717 | if (qemu_file_has_error(f)) |
| 718 | return -EIO; |
| 719 | |
| 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | int qemu_savevm_state_complete(QEMUFile *f) |
| 724 | { |
| 725 | SaveStateEntry *se; |
| 726 | |
| 727 | for (se = first_se; se != NULL; se = se->next) { |
| 728 | if (se->save_live_state == NULL) |
| 729 | continue; |
| 730 | |
| 731 | /* Section type */ |
| 732 | qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 733 | qemu_put_be32(f, se->section_id); |
| 734 | |
| 735 | se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 736 | } |
| 737 | |
| 738 | for(se = first_se; se != NULL; se = se->next) { |
| 739 | int len; |
| 740 | |
| 741 | if (se->save_state == NULL) |
| 742 | continue; |
| 743 | |
| 744 | /* Section type */ |
| 745 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 746 | qemu_put_be32(f, se->section_id); |
| 747 | |
| 748 | /* ID string */ |
| 749 | len = strlen(se->idstr); |
| 750 | qemu_put_byte(f, len); |
| 751 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 752 | |
| 753 | qemu_put_be32(f, se->instance_id); |
| 754 | qemu_put_be32(f, se->version_id); |
| 755 | |
| 756 | se->save_state(f, se->opaque); |
| 757 | } |
| 758 | |
| 759 | qemu_put_byte(f, QEMU_VM_EOF); |
| 760 | |
| 761 | if (qemu_file_has_error(f)) |
| 762 | return -EIO; |
| 763 | |
| 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | int qemu_savevm_state(QEMUFile *f) |
| 768 | { |
| 769 | int saved_vm_running; |
| 770 | int ret; |
| 771 | |
| 772 | saved_vm_running = vm_running; |
| 773 | vm_stop(0); |
| 774 | |
| 775 | bdrv_flush_all(); |
| 776 | |
| 777 | ret = qemu_savevm_state_begin(f); |
| 778 | if (ret < 0) |
| 779 | goto out; |
| 780 | |
| 781 | do { |
| 782 | ret = qemu_savevm_state_iterate(f); |
| 783 | if (ret < 0) |
| 784 | goto out; |
| 785 | } while (ret == 0); |
| 786 | |
| 787 | ret = qemu_savevm_state_complete(f); |
| 788 | |
| 789 | out: |
| 790 | if (qemu_file_has_error(f)) |
| 791 | ret = -EIO; |
| 792 | |
| 793 | if (!ret && saved_vm_running) |
| 794 | vm_start(); |
| 795 | |
| 796 | return ret; |
| 797 | } |
| 798 | |
| 799 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 800 | { |
| 801 | SaveStateEntry *se; |
| 802 | |
| 803 | for(se = first_se; se != NULL; se = se->next) { |
| 804 | if (!strcmp(se->idstr, idstr) && |
| 805 | instance_id == se->instance_id) |
| 806 | return se; |
| 807 | } |
| 808 | return NULL; |
| 809 | } |
| 810 | |
| 811 | typedef struct LoadStateEntry { |
| 812 | SaveStateEntry *se; |
| 813 | int section_id; |
| 814 | int version_id; |
| 815 | struct LoadStateEntry *next; |
| 816 | } LoadStateEntry; |
| 817 | |
| 818 | static int qemu_loadvm_state_v2(QEMUFile *f) |
| 819 | { |
| 820 | SaveStateEntry *se; |
| 821 | int len, ret, instance_id, record_len, version_id; |
| 822 | int64_t total_len, end_pos, cur_pos; |
| 823 | char idstr[256]; |
| 824 | |
| 825 | total_len = qemu_get_be64(f); |
| 826 | end_pos = total_len + qemu_ftell(f); |
| 827 | for(;;) { |
| 828 | if (qemu_ftell(f) >= end_pos) |
| 829 | break; |
| 830 | len = qemu_get_byte(f); |
| 831 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 832 | idstr[len] = '\0'; |
| 833 | instance_id = qemu_get_be32(f); |
| 834 | version_id = qemu_get_be32(f); |
| 835 | record_len = qemu_get_be32(f); |
| 836 | cur_pos = qemu_ftell(f); |
| 837 | se = find_se(idstr, instance_id); |
| 838 | if (!se) { |
| 839 | fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n", |
| 840 | instance_id, idstr); |
| 841 | } else { |
| 842 | ret = se->load_state(f, se->opaque, version_id); |
| 843 | if (ret < 0) { |
| 844 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", |
| 845 | instance_id, idstr); |
| 846 | } |
| 847 | } |
| 848 | /* always seek to exact end of record */ |
| 849 | qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
| 850 | } |
| 851 | |
| 852 | if (qemu_file_has_error(f)) |
| 853 | return -EIO; |
| 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | int qemu_loadvm_state(QEMUFile *f) |
| 859 | { |
| 860 | LoadStateEntry *first_le = NULL; |
| 861 | uint8_t section_type; |
| 862 | unsigned int v; |
| 863 | int ret; |
| 864 | |
| 865 | v = qemu_get_be32(f); |
| 866 | if (v != QEMU_VM_FILE_MAGIC) |
| 867 | return -EINVAL; |
| 868 | |
| 869 | v = qemu_get_be32(f); |
| 870 | if (v == QEMU_VM_FILE_VERSION_COMPAT) |
| 871 | return qemu_loadvm_state_v2(f); |
| 872 | if (v != QEMU_VM_FILE_VERSION) |
| 873 | return -ENOTSUP; |
| 874 | |
| 875 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { |
| 876 | uint32_t instance_id, version_id, section_id; |
| 877 | LoadStateEntry *le; |
| 878 | SaveStateEntry *se; |
| 879 | char idstr[257]; |
| 880 | int len; |
| 881 | |
| 882 | switch (section_type) { |
| 883 | case QEMU_VM_SECTION_START: |
| 884 | case QEMU_VM_SECTION_FULL: |
| 885 | /* Read section start */ |
| 886 | section_id = qemu_get_be32(f); |
| 887 | len = qemu_get_byte(f); |
| 888 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 889 | idstr[len] = 0; |
| 890 | instance_id = qemu_get_be32(f); |
| 891 | version_id = qemu_get_be32(f); |
| 892 | |
| 893 | /* Find savevm section */ |
| 894 | se = find_se(idstr, instance_id); |
| 895 | if (se == NULL) { |
| 896 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); |
| 897 | ret = -EINVAL; |
| 898 | goto out; |
| 899 | } |
| 900 | |
| 901 | /* Validate version */ |
| 902 | if (version_id > se->version_id) { |
| 903 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", |
| 904 | version_id, idstr, se->version_id); |
| 905 | ret = -EINVAL; |
| 906 | goto out; |
| 907 | } |
| 908 | |
| 909 | /* Add entry */ |
| 910 | le = qemu_mallocz(sizeof(*le)); |
| 911 | if (le == NULL) { |
| 912 | ret = -ENOMEM; |
| 913 | goto out; |
| 914 | } |
| 915 | |
| 916 | le->se = se; |
| 917 | le->section_id = section_id; |
| 918 | le->version_id = version_id; |
| 919 | le->next = first_le; |
| 920 | first_le = le; |
| 921 | |
| 922 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 923 | break; |
| 924 | case QEMU_VM_SECTION_PART: |
| 925 | case QEMU_VM_SECTION_END: |
| 926 | section_id = qemu_get_be32(f); |
| 927 | |
| 928 | for (le = first_le; le && le->section_id != section_id; le = le->next); |
| 929 | if (le == NULL) { |
| 930 | fprintf(stderr, "Unknown savevm section %d\n", section_id); |
| 931 | ret = -EINVAL; |
| 932 | goto out; |
| 933 | } |
| 934 | |
| 935 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 936 | break; |
| 937 | default: |
| 938 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); |
| 939 | ret = -EINVAL; |
| 940 | goto out; |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | ret = 0; |
| 945 | |
| 946 | out: |
| 947 | while (first_le) { |
| 948 | LoadStateEntry *le = first_le; |
| 949 | first_le = first_le->next; |
| 950 | qemu_free(le); |
| 951 | } |
| 952 | |
| 953 | if (qemu_file_has_error(f)) |
| 954 | ret = -EIO; |
| 955 | |
| 956 | return ret; |
| 957 | } |
| 958 | |
| 959 | /* device can contain snapshots */ |
| 960 | static int bdrv_can_snapshot(BlockDriverState *bs) |
| 961 | { |
| 962 | return (bs && |
| 963 | !bdrv_is_removable(bs) && |
| 964 | !bdrv_is_read_only(bs)); |
| 965 | } |
| 966 | |
| 967 | /* device must be snapshots in order to have a reliable snapshot */ |
| 968 | static int bdrv_has_snapshot(BlockDriverState *bs) |
| 969 | { |
| 970 | return (bs && |
| 971 | !bdrv_is_removable(bs) && |
| 972 | !bdrv_is_read_only(bs)); |
| 973 | } |
| 974 | |
| 975 | static BlockDriverState *get_bs_snapshots(void) |
| 976 | { |
| 977 | BlockDriverState *bs; |
| 978 | int i; |
| 979 | |
| 980 | if (bs_snapshots) |
| 981 | return bs_snapshots; |
| 982 | for(i = 0; i <= nb_drives; i++) { |
| 983 | bs = drives_table[i].bdrv; |
| 984 | if (bdrv_can_snapshot(bs)) |
| 985 | goto ok; |
| 986 | } |
| 987 | return NULL; |
| 988 | ok: |
| 989 | bs_snapshots = bs; |
| 990 | return bs; |
| 991 | } |
| 992 | |
| 993 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 994 | const char *name) |
| 995 | { |
| 996 | QEMUSnapshotInfo *sn_tab, *sn; |
| 997 | int nb_sns, i, ret; |
| 998 | |
| 999 | ret = -ENOENT; |
| 1000 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1001 | if (nb_sns < 0) |
| 1002 | return ret; |
| 1003 | for(i = 0; i < nb_sns; i++) { |
| 1004 | sn = &sn_tab[i]; |
| 1005 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { |
| 1006 | *sn_info = *sn; |
| 1007 | ret = 0; |
| 1008 | break; |
| 1009 | } |
| 1010 | } |
| 1011 | qemu_free(sn_tab); |
| 1012 | return ret; |
| 1013 | } |
| 1014 | |
| 1015 | void do_savevm(const char *name) |
| 1016 | { |
| 1017 | BlockDriverState *bs, *bs1; |
| 1018 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1019 | int must_delete, ret, i; |
| 1020 | BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1021 | QEMUFile *f; |
| 1022 | int saved_vm_running; |
aliguori | 2d22b18 | 2008-12-11 21:06:49 +0000 | [diff] [blame^] | 1023 | uint32_t vm_state_size; |
aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [diff] [blame] | 1024 | #ifdef _WIN32 |
| 1025 | struct _timeb tb; |
| 1026 | #else |
| 1027 | struct timeval tv; |
| 1028 | #endif |
| 1029 | |
| 1030 | bs = get_bs_snapshots(); |
| 1031 | if (!bs) { |
| 1032 | term_printf("No block device can accept snapshots\n"); |
| 1033 | return; |
| 1034 | } |
| 1035 | |
| 1036 | /* ??? Should this occur after vm_stop? */ |
| 1037 | qemu_aio_flush(); |
| 1038 | |
| 1039 | saved_vm_running = vm_running; |
| 1040 | vm_stop(0); |
| 1041 | |
| 1042 | must_delete = 0; |
| 1043 | if (name) { |
| 1044 | ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1045 | if (ret >= 0) { |
| 1046 | must_delete = 1; |
| 1047 | } |
| 1048 | } |
| 1049 | memset(sn, 0, sizeof(*sn)); |
| 1050 | if (must_delete) { |
| 1051 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); |
| 1052 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); |
| 1053 | } else { |
| 1054 | if (name) |
| 1055 | pstrcpy(sn->name, sizeof(sn->name), name); |
| 1056 | } |
| 1057 | |
| 1058 | /* fill auxiliary fields */ |
| 1059 | #ifdef _WIN32 |
| 1060 | _ftime(&tb); |
| 1061 | sn->date_sec = tb.time; |
| 1062 | sn->date_nsec = tb.millitm * 1000000; |
| 1063 | #else |
| 1064 | gettimeofday(&tv, NULL); |
| 1065 | sn->date_sec = tv.tv_sec; |
| 1066 | sn->date_nsec = tv.tv_usec * 1000; |
| 1067 | #endif |
| 1068 | sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1069 | |
| 1070 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1071 | term_printf("Device %s does not support VM state snapshots\n", |
| 1072 | bdrv_get_device_name(bs)); |
| 1073 | goto the_end; |
| 1074 | } |
| 1075 | |
| 1076 | /* save the VM state */ |
| 1077 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1); |
| 1078 | if (!f) { |
| 1079 | term_printf("Could not open VM state file\n"); |
| 1080 | goto the_end; |
| 1081 | } |
| 1082 | ret = qemu_savevm_state(f); |
aliguori | 2d22b18 | 2008-12-11 21:06:49 +0000 | [diff] [blame^] | 1083 | vm_state_size = qemu_ftell(f); |
aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [diff] [blame] | 1084 | qemu_fclose(f); |
| 1085 | if (ret < 0) { |
| 1086 | term_printf("Error %d while writing VM\n", ret); |
| 1087 | goto the_end; |
| 1088 | } |
| 1089 | |
| 1090 | /* create the snapshots */ |
| 1091 | |
| 1092 | for(i = 0; i < nb_drives; i++) { |
| 1093 | bs1 = drives_table[i].bdrv; |
| 1094 | if (bdrv_has_snapshot(bs1)) { |
| 1095 | if (must_delete) { |
| 1096 | ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
| 1097 | if (ret < 0) { |
| 1098 | term_printf("Error while deleting snapshot on '%s'\n", |
| 1099 | bdrv_get_device_name(bs1)); |
| 1100 | } |
| 1101 | } |
aliguori | 2d22b18 | 2008-12-11 21:06:49 +0000 | [diff] [blame^] | 1102 | /* Write VM state size only to the image that contains the state */ |
| 1103 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); |
aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [diff] [blame] | 1104 | ret = bdrv_snapshot_create(bs1, sn); |
| 1105 | if (ret < 0) { |
| 1106 | term_printf("Error while creating snapshot on '%s'\n", |
| 1107 | bdrv_get_device_name(bs1)); |
| 1108 | } |
| 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | the_end: |
| 1113 | if (saved_vm_running) |
| 1114 | vm_start(); |
| 1115 | } |
| 1116 | |
| 1117 | void do_loadvm(const char *name) |
| 1118 | { |
| 1119 | BlockDriverState *bs, *bs1; |
| 1120 | BlockDriverInfo bdi1, *bdi = &bdi1; |
aliguori | 2d22b18 | 2008-12-11 21:06:49 +0000 | [diff] [blame^] | 1121 | QEMUSnapshotInfo sn; |
aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [diff] [blame] | 1122 | QEMUFile *f; |
| 1123 | int i, ret; |
| 1124 | int saved_vm_running; |
| 1125 | |
| 1126 | bs = get_bs_snapshots(); |
| 1127 | if (!bs) { |
| 1128 | term_printf("No block device supports snapshots\n"); |
| 1129 | return; |
| 1130 | } |
| 1131 | |
| 1132 | /* Flush all IO requests so they don't interfere with the new state. */ |
| 1133 | qemu_aio_flush(); |
| 1134 | |
| 1135 | saved_vm_running = vm_running; |
| 1136 | vm_stop(0); |
| 1137 | |
| 1138 | for(i = 0; i <= nb_drives; i++) { |
| 1139 | bs1 = drives_table[i].bdrv; |
| 1140 | if (bdrv_has_snapshot(bs1)) { |
| 1141 | ret = bdrv_snapshot_goto(bs1, name); |
| 1142 | if (ret < 0) { |
| 1143 | if (bs != bs1) |
| 1144 | term_printf("Warning: "); |
| 1145 | switch(ret) { |
| 1146 | case -ENOTSUP: |
| 1147 | term_printf("Snapshots not supported on device '%s'\n", |
| 1148 | bdrv_get_device_name(bs1)); |
| 1149 | break; |
| 1150 | case -ENOENT: |
| 1151 | term_printf("Could not find snapshot '%s' on device '%s'\n", |
| 1152 | name, bdrv_get_device_name(bs1)); |
| 1153 | break; |
| 1154 | default: |
| 1155 | term_printf("Error %d while activating snapshot on '%s'\n", |
| 1156 | ret, bdrv_get_device_name(bs1)); |
| 1157 | break; |
| 1158 | } |
| 1159 | /* fatal on snapshot block device */ |
| 1160 | if (bs == bs1) |
| 1161 | goto the_end; |
| 1162 | } |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1167 | term_printf("Device %s does not support VM state snapshots\n", |
| 1168 | bdrv_get_device_name(bs)); |
| 1169 | return; |
| 1170 | } |
| 1171 | |
aliguori | 2d22b18 | 2008-12-11 21:06:49 +0000 | [diff] [blame^] | 1172 | /* Don't even try to load empty VM states */ |
| 1173 | ret = bdrv_snapshot_find(bs, &sn, name); |
| 1174 | if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1175 | goto the_end; |
| 1176 | |
aliguori | a672b46 | 2008-11-11 21:33:36 +0000 | [diff] [blame] | 1177 | /* restore the VM state */ |
| 1178 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0); |
| 1179 | if (!f) { |
| 1180 | term_printf("Could not open VM state file\n"); |
| 1181 | goto the_end; |
| 1182 | } |
| 1183 | ret = qemu_loadvm_state(f); |
| 1184 | qemu_fclose(f); |
| 1185 | if (ret < 0) { |
| 1186 | term_printf("Error %d while loading VM state\n", ret); |
| 1187 | } |
| 1188 | the_end: |
| 1189 | if (saved_vm_running) |
| 1190 | vm_start(); |
| 1191 | } |
| 1192 | |
| 1193 | void do_delvm(const char *name) |
| 1194 | { |
| 1195 | BlockDriverState *bs, *bs1; |
| 1196 | int i, ret; |
| 1197 | |
| 1198 | bs = get_bs_snapshots(); |
| 1199 | if (!bs) { |
| 1200 | term_printf("No block device supports snapshots\n"); |
| 1201 | return; |
| 1202 | } |
| 1203 | |
| 1204 | for(i = 0; i <= nb_drives; i++) { |
| 1205 | bs1 = drives_table[i].bdrv; |
| 1206 | if (bdrv_has_snapshot(bs1)) { |
| 1207 | ret = bdrv_snapshot_delete(bs1, name); |
| 1208 | if (ret < 0) { |
| 1209 | if (ret == -ENOTSUP) |
| 1210 | term_printf("Snapshots not supported on device '%s'\n", |
| 1211 | bdrv_get_device_name(bs1)); |
| 1212 | else |
| 1213 | term_printf("Error %d while deleting snapshot on '%s'\n", |
| 1214 | ret, bdrv_get_device_name(bs1)); |
| 1215 | } |
| 1216 | } |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | void do_info_snapshots(void) |
| 1221 | { |
| 1222 | BlockDriverState *bs, *bs1; |
| 1223 | QEMUSnapshotInfo *sn_tab, *sn; |
| 1224 | int nb_sns, i; |
| 1225 | char buf[256]; |
| 1226 | |
| 1227 | bs = get_bs_snapshots(); |
| 1228 | if (!bs) { |
| 1229 | term_printf("No available block device supports snapshots\n"); |
| 1230 | return; |
| 1231 | } |
| 1232 | term_printf("Snapshot devices:"); |
| 1233 | for(i = 0; i <= nb_drives; i++) { |
| 1234 | bs1 = drives_table[i].bdrv; |
| 1235 | if (bdrv_has_snapshot(bs1)) { |
| 1236 | if (bs == bs1) |
| 1237 | term_printf(" %s", bdrv_get_device_name(bs1)); |
| 1238 | } |
| 1239 | } |
| 1240 | term_printf("\n"); |
| 1241 | |
| 1242 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1243 | if (nb_sns < 0) { |
| 1244 | term_printf("bdrv_snapshot_list: error %d\n", nb_sns); |
| 1245 | return; |
| 1246 | } |
| 1247 | term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs)); |
| 1248 | term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1249 | for(i = 0; i < nb_sns; i++) { |
| 1250 | sn = &sn_tab[i]; |
| 1251 | term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1252 | } |
| 1253 | qemu_free(sn_tab); |
| 1254 | } |