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 | |
David 'Digit' Turner | 2c538c8 | 2010-05-10 16:48:20 -0700 | [diff] [blame] | 32 | /* Needed early for CONFIG_BSD etc. */ |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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> |
David 'Digit' Turner | 2c538c8 | 2010-05-10 16:48:20 -0700 | [diff] [blame] | 55 | #ifdef CONFIG_BSD |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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; |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 164 | QEMUFileGetRateLimit *get_rate_limit; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 165 | void *opaque; |
| 166 | int is_write; |
| 167 | |
| 168 | int64_t buf_offset; /* start of buffer when writing, end of buffer |
| 169 | when reading */ |
| 170 | int buf_index; |
| 171 | int buf_size; /* 0 when writing */ |
| 172 | uint8_t buf[IO_BUF_SIZE]; |
| 173 | |
| 174 | int has_error; |
| 175 | }; |
| 176 | |
| 177 | typedef struct QEMUFilePopen |
| 178 | { |
| 179 | FILE *popen_file; |
| 180 | QEMUFile *file; |
| 181 | } QEMUFilePopen; |
| 182 | |
| 183 | typedef struct QEMUFileSocket |
| 184 | { |
| 185 | int fd; |
| 186 | QEMUFile *file; |
| 187 | } QEMUFileSocket; |
| 188 | |
| 189 | static int file_socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 190 | { |
| 191 | QEMUFileSocket *s = opaque; |
| 192 | ssize_t len; |
| 193 | |
| 194 | do { |
| 195 | len = recv(s->fd, (void *)buf, size, 0); |
| 196 | } while (len == -1 && socket_error() == EINTR); |
| 197 | |
| 198 | if (len == -1) |
| 199 | len = -socket_error(); |
| 200 | |
| 201 | return len; |
| 202 | } |
| 203 | |
| 204 | static int file_socket_close(void *opaque) |
| 205 | { |
| 206 | QEMUFileSocket *s = opaque; |
| 207 | qemu_free(s); |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
| 212 | { |
| 213 | QEMUFilePopen *s = opaque; |
| 214 | return fwrite(buf, 1, size, s->popen_file); |
| 215 | } |
| 216 | |
| 217 | static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 218 | { |
| 219 | QEMUFilePopen *s = opaque; |
| 220 | FILE *fp = s->popen_file; |
| 221 | int bytes; |
| 222 | |
| 223 | do { |
| 224 | clearerr(fp); |
| 225 | bytes = fread(buf, 1, size, fp); |
| 226 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
| 227 | return bytes; |
| 228 | } |
| 229 | |
| 230 | static int popen_close(void *opaque) |
| 231 | { |
| 232 | QEMUFilePopen *s = opaque; |
| 233 | pclose(s->popen_file); |
| 234 | qemu_free(s); |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
| 239 | { |
| 240 | QEMUFilePopen *s; |
| 241 | |
| 242 | if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 243 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
| 244 | return NULL; |
| 245 | } |
| 246 | |
| 247 | s = qemu_mallocz(sizeof(QEMUFilePopen)); |
| 248 | |
| 249 | s->popen_file = popen_file; |
| 250 | |
| 251 | if(mode[0] == 'r') { |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 252 | s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 253 | } else { |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 254 | s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 255 | } |
| 256 | return s->file; |
| 257 | } |
| 258 | |
| 259 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 260 | { |
| 261 | FILE *popen_file; |
| 262 | |
| 263 | popen_file = popen(command, mode); |
| 264 | if(popen_file == NULL) { |
| 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | return qemu_popen(popen_file, mode); |
| 269 | } |
| 270 | |
| 271 | int qemu_popen_fd(QEMUFile *f) |
| 272 | { |
| 273 | QEMUFilePopen *p; |
| 274 | int fd; |
| 275 | |
| 276 | p = (QEMUFilePopen *)f->opaque; |
| 277 | fd = fileno(p->popen_file); |
| 278 | |
| 279 | return fd; |
| 280 | } |
| 281 | |
| 282 | QEMUFile *qemu_fopen_socket(int fd) |
| 283 | { |
| 284 | QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket)); |
| 285 | |
| 286 | s->fd = fd; |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 287 | s->file = qemu_fopen_ops(s, NULL, file_socket_get_buffer, file_socket_close, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 288 | return s->file; |
| 289 | } |
| 290 | |
| 291 | typedef struct QEMUFileStdio |
| 292 | { |
| 293 | FILE *outfile; |
| 294 | } QEMUFileStdio; |
| 295 | |
| 296 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 297 | int64_t pos, int size) |
| 298 | { |
| 299 | QEMUFileStdio *s = opaque; |
| 300 | fseek(s->outfile, pos, SEEK_SET); |
| 301 | fwrite(buf, 1, size, s->outfile); |
| 302 | return size; |
| 303 | } |
| 304 | |
| 305 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 306 | { |
| 307 | QEMUFileStdio *s = opaque; |
| 308 | fseek(s->outfile, pos, SEEK_SET); |
| 309 | return fread(buf, 1, size, s->outfile); |
| 310 | } |
| 311 | |
| 312 | static int file_close(void *opaque) |
| 313 | { |
| 314 | QEMUFileStdio *s = opaque; |
| 315 | fclose(s->outfile); |
| 316 | qemu_free(s); |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 321 | { |
| 322 | QEMUFileStdio *s; |
| 323 | |
| 324 | s = qemu_mallocz(sizeof(QEMUFileStdio)); |
| 325 | |
| 326 | s->outfile = fopen(filename, mode); |
| 327 | if (!s->outfile) |
| 328 | goto fail; |
| 329 | |
| 330 | if (!strcmp(mode, "wb")) |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 331 | return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 332 | else if (!strcmp(mode, "rb")) |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 333 | return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 334 | |
| 335 | fail: |
| 336 | if (s->outfile) |
| 337 | fclose(s->outfile); |
| 338 | qemu_free(s); |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | typedef struct QEMUFileBdrv |
| 343 | { |
| 344 | BlockDriverState *bs; |
| 345 | int64_t base_offset; |
| 346 | } QEMUFileBdrv; |
| 347 | |
| 348 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
| 349 | int64_t pos, int size) |
| 350 | { |
| 351 | QEMUFileBdrv *s = opaque; |
| 352 | bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size); |
| 353 | return size; |
| 354 | } |
| 355 | |
| 356 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 357 | { |
| 358 | QEMUFileBdrv *s = opaque; |
| 359 | return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size); |
| 360 | } |
| 361 | |
| 362 | static int bdrv_fclose(void *opaque) |
| 363 | { |
| 364 | QEMUFileBdrv *s = opaque; |
| 365 | qemu_free(s); |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
| 370 | { |
| 371 | QEMUFileBdrv *s; |
| 372 | |
| 373 | s = qemu_mallocz(sizeof(QEMUFileBdrv)); |
| 374 | |
| 375 | s->bs = bs; |
| 376 | s->base_offset = offset; |
| 377 | |
| 378 | if (is_writable) |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 379 | return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 380 | |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 381 | return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, |
| 385 | QEMUFileGetBufferFunc *get_buffer, |
| 386 | QEMUFileCloseFunc *close, |
| 387 | QEMUFileRateLimit *rate_limit, |
David Turner | a12820e | 2010-09-09 21:16:39 +0200 | [diff] [blame] | 388 | QEMUFileSetRateLimit *set_rate_limit, |
| 389 | QEMUFileGetRateLimit *get_rate_limit) |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 390 | { |
| 391 | QEMUFile *f; |
| 392 | |
| 393 | f = qemu_mallocz(sizeof(QEMUFile)); |
| 394 | |
| 395 | f->opaque = opaque; |
| 396 | f->put_buffer = put_buffer; |
| 397 | f->get_buffer = get_buffer; |
| 398 | f->close = close; |
| 399 | f->rate_limit = rate_limit; |
| 400 | f->set_rate_limit = set_rate_limit; |
| 401 | f->is_write = 0; |
| 402 | |
| 403 | return f; |
| 404 | } |
| 405 | |
| 406 | int qemu_file_has_error(QEMUFile *f) |
| 407 | { |
| 408 | return f->has_error; |
| 409 | } |
| 410 | |
| 411 | void qemu_file_set_error(QEMUFile *f) |
| 412 | { |
| 413 | f->has_error = 1; |
| 414 | } |
| 415 | |
| 416 | void qemu_fflush(QEMUFile *f) |
| 417 | { |
| 418 | if (!f->put_buffer) |
| 419 | return; |
| 420 | |
| 421 | if (f->is_write && f->buf_index > 0) { |
| 422 | int len; |
| 423 | |
| 424 | len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 425 | if (len > 0) |
| 426 | f->buf_offset += f->buf_index; |
| 427 | else |
| 428 | f->has_error = 1; |
| 429 | f->buf_index = 0; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | static void qemu_fill_buffer(QEMUFile *f) |
| 434 | { |
| 435 | int len; |
| 436 | |
| 437 | if (!f->get_buffer) |
| 438 | return; |
| 439 | |
| 440 | if (f->is_write) |
| 441 | abort(); |
| 442 | |
| 443 | len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 444 | if (len > 0) { |
| 445 | f->buf_index = 0; |
| 446 | f->buf_size = len; |
| 447 | f->buf_offset += len; |
| 448 | } else if (len != -EAGAIN) |
| 449 | f->has_error = 1; |
| 450 | } |
| 451 | |
| 452 | int qemu_fclose(QEMUFile *f) |
| 453 | { |
| 454 | int ret = 0; |
| 455 | qemu_fflush(f); |
| 456 | if (f->close) |
| 457 | ret = f->close(f->opaque); |
| 458 | qemu_free(f); |
| 459 | return ret; |
| 460 | } |
| 461 | |
| 462 | void qemu_file_put_notify(QEMUFile *f) |
| 463 | { |
| 464 | f->put_buffer(f->opaque, NULL, 0, 0); |
| 465 | } |
| 466 | |
| 467 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 468 | { |
| 469 | int l; |
| 470 | |
| 471 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 472 | fprintf(stderr, |
| 473 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 474 | abort(); |
| 475 | } |
| 476 | |
| 477 | while (!f->has_error && size > 0) { |
| 478 | l = IO_BUF_SIZE - f->buf_index; |
| 479 | if (l > size) |
| 480 | l = size; |
| 481 | memcpy(f->buf + f->buf_index, buf, l); |
| 482 | f->is_write = 1; |
| 483 | f->buf_index += l; |
| 484 | buf += l; |
| 485 | size -= l; |
| 486 | if (f->buf_index >= IO_BUF_SIZE) |
| 487 | qemu_fflush(f); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | void qemu_put_byte(QEMUFile *f, int v) |
| 492 | { |
| 493 | if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 494 | fprintf(stderr, |
| 495 | "Attempted to write to buffer while read buffer is not empty\n"); |
| 496 | abort(); |
| 497 | } |
| 498 | |
| 499 | f->buf[f->buf_index++] = v; |
| 500 | f->is_write = 1; |
| 501 | if (f->buf_index >= IO_BUF_SIZE) |
| 502 | qemu_fflush(f); |
| 503 | } |
| 504 | |
| 505 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 506 | { |
| 507 | int size, l; |
| 508 | |
| 509 | if (f->is_write) |
| 510 | abort(); |
| 511 | |
| 512 | size = size1; |
| 513 | while (size > 0) { |
| 514 | l = f->buf_size - f->buf_index; |
| 515 | if (l == 0) { |
| 516 | qemu_fill_buffer(f); |
| 517 | l = f->buf_size - f->buf_index; |
| 518 | if (l == 0) |
| 519 | break; |
| 520 | } |
| 521 | if (l > size) |
| 522 | l = size; |
| 523 | memcpy(buf, f->buf + f->buf_index, l); |
| 524 | f->buf_index += l; |
| 525 | buf += l; |
| 526 | size -= l; |
| 527 | } |
| 528 | return size1 - size; |
| 529 | } |
| 530 | |
| 531 | int qemu_get_byte(QEMUFile *f) |
| 532 | { |
| 533 | if (f->is_write) |
| 534 | abort(); |
| 535 | |
| 536 | if (f->buf_index >= f->buf_size) { |
| 537 | qemu_fill_buffer(f); |
| 538 | if (f->buf_index >= f->buf_size) |
| 539 | return 0; |
| 540 | } |
| 541 | return f->buf[f->buf_index++]; |
| 542 | } |
| 543 | |
| 544 | int64_t qemu_ftell(QEMUFile *f) |
| 545 | { |
| 546 | return f->buf_offset - f->buf_size + f->buf_index; |
| 547 | } |
| 548 | |
| 549 | int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence) |
| 550 | { |
| 551 | if (whence == SEEK_SET) { |
| 552 | /* nothing to do */ |
| 553 | } else if (whence == SEEK_CUR) { |
| 554 | pos += qemu_ftell(f); |
| 555 | } else { |
| 556 | /* SEEK_END not supported */ |
| 557 | return -1; |
| 558 | } |
| 559 | if (f->put_buffer) { |
| 560 | qemu_fflush(f); |
| 561 | f->buf_offset = pos; |
| 562 | } else { |
| 563 | f->buf_offset = pos; |
| 564 | f->buf_index = 0; |
| 565 | f->buf_size = 0; |
| 566 | } |
| 567 | return pos; |
| 568 | } |
| 569 | |
| 570 | int qemu_file_rate_limit(QEMUFile *f) |
| 571 | { |
| 572 | if (f->rate_limit) |
| 573 | return f->rate_limit(f->opaque); |
| 574 | |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
| 579 | { |
| 580 | if (f->set_rate_limit) |
| 581 | return f->set_rate_limit(f->opaque, new_rate); |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 587 | { |
| 588 | qemu_put_byte(f, v >> 8); |
| 589 | qemu_put_byte(f, v); |
| 590 | } |
| 591 | |
| 592 | void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 593 | { |
| 594 | qemu_put_byte(f, v >> 24); |
| 595 | qemu_put_byte(f, v >> 16); |
| 596 | qemu_put_byte(f, v >> 8); |
| 597 | qemu_put_byte(f, v); |
| 598 | } |
| 599 | |
| 600 | void qemu_put_be64(QEMUFile *f, uint64_t v) |
| 601 | { |
| 602 | qemu_put_be32(f, v >> 32); |
| 603 | qemu_put_be32(f, v); |
| 604 | } |
| 605 | |
| 606 | unsigned int qemu_get_be16(QEMUFile *f) |
| 607 | { |
| 608 | unsigned int v; |
| 609 | v = qemu_get_byte(f) << 8; |
| 610 | v |= qemu_get_byte(f); |
| 611 | return v; |
| 612 | } |
| 613 | |
| 614 | unsigned int qemu_get_be32(QEMUFile *f) |
| 615 | { |
| 616 | unsigned int v; |
| 617 | v = qemu_get_byte(f) << 24; |
| 618 | v |= qemu_get_byte(f) << 16; |
| 619 | v |= qemu_get_byte(f) << 8; |
| 620 | v |= qemu_get_byte(f); |
| 621 | return v; |
| 622 | } |
| 623 | |
| 624 | uint64_t qemu_get_be64(QEMUFile *f) |
| 625 | { |
| 626 | uint64_t v; |
| 627 | v = (uint64_t)qemu_get_be32(f) << 32; |
| 628 | v |= qemu_get_be32(f); |
| 629 | return v; |
| 630 | } |
| 631 | |
| 632 | void qemu_put_struct(QEMUFile* f, const QField* fields, const void* s) |
| 633 | { |
| 634 | const QField* qf = fields; |
| 635 | |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 636 | /* Iterate over struct fields */ |
| 637 | while (qf->type != Q_FIELD_END) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 638 | uint8_t* p = (uint8_t*)s + qf->offset; |
| 639 | |
| 640 | switch (qf->type) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 641 | case Q_FIELD_BYTE: |
| 642 | qemu_put_byte(f, p[0]); |
| 643 | break; |
| 644 | case Q_FIELD_INT16: |
| 645 | qemu_put_be16(f, ((uint16_t*)p)[0]); |
| 646 | break; |
| 647 | case Q_FIELD_INT32: |
| 648 | qemu_put_be32(f, ((uint32_t*)p)[0]); |
| 649 | break; |
| 650 | case Q_FIELD_INT64: |
| 651 | qemu_put_be64(f, ((uint64_t*)p)[0]); |
| 652 | break; |
| 653 | case Q_FIELD_BUFFER: |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 654 | if (qf[1].type != Q_FIELD_BUFFER_SIZE || |
| 655 | qf[2].type != Q_FIELD_BUFFER_SIZE) |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 656 | { |
| 657 | fprintf(stderr, "%s: invalid QFIELD_BUFFER item passed as argument. aborting\n", |
| 658 | __FUNCTION__ ); |
| 659 | exit(1); |
| 660 | } |
| 661 | else |
| 662 | { |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 663 | uint32_t size = ((uint32_t)qf[1].offset << 16) | (uint32_t)qf[2].offset; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 664 | |
| 665 | qemu_put_buffer(f, p, size); |
| 666 | qf += 2; |
| 667 | } |
| 668 | break; |
| 669 | default: |
| 670 | fprintf(stderr, "%s: invalid fields list passed as argument. aborting\n", __FUNCTION__); |
| 671 | exit(1); |
| 672 | } |
| 673 | qf++; |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | int qemu_get_struct(QEMUFile* f, const QField* fields, void* s) |
| 678 | { |
| 679 | const QField* qf = fields; |
| 680 | |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 681 | /* Iterate over struct fields */ |
| 682 | while (qf->type != Q_FIELD_END) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 683 | uint8_t* p = (uint8_t*)s + qf->offset; |
| 684 | |
| 685 | switch (qf->type) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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: |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 699 | if (qf[1].type != Q_FIELD_BUFFER_SIZE || |
| 700 | qf[2].type != Q_FIELD_BUFFER_SIZE) |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 701 | { |
| 702 | fprintf(stderr, "%s: invalid QFIELD_BUFFER item passed as argument.\n", |
| 703 | __FUNCTION__ ); |
| 704 | return -1; |
| 705 | } |
| 706 | else |
| 707 | { |
Ot ten Thije | 7fd67eb | 2010-07-29 10:26:01 +0100 | [diff] [blame] | 708 | uint32_t size = ((uint32_t)qf[1].offset << 16) | (uint32_t)qf[2].offset; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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 | |
Ot ten Thije | 871da2a | 2010-09-20 10:29:22 +0100 | [diff] [blame^] | 727 | /* write a float to file */ |
| 728 | void qemu_put_float(QEMUFile *f, float v) |
| 729 | { |
| 730 | uint8_t *bytes = (uint8_t*) &v; |
| 731 | qemu_put_buffer(f, bytes, sizeof(float)); |
| 732 | } |
| 733 | |
| 734 | /* read a float from file */ |
| 735 | float qemu_get_float(QEMUFile *f) |
| 736 | { |
| 737 | uint8_t bytes[sizeof(float)]; |
| 738 | qemu_get_buffer(f, bytes, sizeof(float)); |
| 739 | |
| 740 | return *((float*) bytes); |
| 741 | } |
| 742 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 743 | typedef struct SaveStateEntry { |
| 744 | char idstr[256]; |
| 745 | int instance_id; |
| 746 | int version_id; |
| 747 | int section_id; |
| 748 | SaveLiveStateHandler *save_live_state; |
| 749 | SaveStateHandler *save_state; |
| 750 | LoadStateHandler *load_state; |
| 751 | void *opaque; |
| 752 | struct SaveStateEntry *next; |
| 753 | } SaveStateEntry; |
| 754 | |
| 755 | static SaveStateEntry *first_se; |
| 756 | |
| 757 | /* TODO: Individual devices generally have very little idea about the rest |
| 758 | of the system, so instance_id should be removed/replaced. |
| 759 | Meanwhile pass -1 as instance_id if you do not already have a clearly |
| 760 | distinguishing id for all instances of your device class. */ |
| 761 | int register_savevm_live(const char *idstr, |
| 762 | int instance_id, |
| 763 | int version_id, |
| 764 | SaveLiveStateHandler *save_live_state, |
| 765 | SaveStateHandler *save_state, |
| 766 | LoadStateHandler *load_state, |
| 767 | void *opaque) |
| 768 | { |
| 769 | SaveStateEntry *se, **pse; |
| 770 | static int global_section_id; |
| 771 | |
| 772 | se = qemu_malloc(sizeof(SaveStateEntry)); |
| 773 | pstrcpy(se->idstr, sizeof(se->idstr), idstr); |
| 774 | se->instance_id = (instance_id == -1) ? 0 : instance_id; |
| 775 | se->version_id = version_id; |
| 776 | se->section_id = global_section_id++; |
| 777 | se->save_live_state = save_live_state; |
| 778 | se->save_state = save_state; |
| 779 | se->load_state = load_state; |
| 780 | se->opaque = opaque; |
| 781 | se->next = NULL; |
| 782 | |
| 783 | /* add at the end of list */ |
| 784 | pse = &first_se; |
| 785 | while (*pse != NULL) { |
| 786 | if (instance_id == -1 |
| 787 | && strcmp(se->idstr, (*pse)->idstr) == 0 |
| 788 | && se->instance_id <= (*pse)->instance_id) |
| 789 | se->instance_id = (*pse)->instance_id + 1; |
| 790 | pse = &(*pse)->next; |
| 791 | } |
| 792 | *pse = se; |
| 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | int register_savevm(const char *idstr, |
| 797 | int instance_id, |
| 798 | int version_id, |
| 799 | SaveStateHandler *save_state, |
| 800 | LoadStateHandler *load_state, |
| 801 | void *opaque) |
| 802 | { |
| 803 | return register_savevm_live(idstr, instance_id, version_id, |
| 804 | NULL, save_state, load_state, opaque); |
| 805 | } |
| 806 | |
| 807 | void unregister_savevm(const char *idstr, void *opaque) |
| 808 | { |
| 809 | SaveStateEntry **pse; |
| 810 | |
| 811 | pse = &first_se; |
| 812 | while (*pse != NULL) { |
| 813 | if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
| 814 | SaveStateEntry *next = (*pse)->next; |
| 815 | qemu_free(*pse); |
| 816 | *pse = next; |
| 817 | continue; |
| 818 | } |
| 819 | pse = &(*pse)->next; |
| 820 | } |
| 821 | } |
| 822 | |
| 823 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
| 824 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 825 | #define QEMU_VM_FILE_VERSION 0x00000003 |
| 826 | |
| 827 | #define QEMU_VM_EOF 0x00 |
| 828 | #define QEMU_VM_SECTION_START 0x01 |
| 829 | #define QEMU_VM_SECTION_PART 0x02 |
| 830 | #define QEMU_VM_SECTION_END 0x03 |
| 831 | #define QEMU_VM_SECTION_FULL 0x04 |
| 832 | |
| 833 | int qemu_savevm_state_begin(QEMUFile *f) |
| 834 | { |
| 835 | SaveStateEntry *se; |
| 836 | |
| 837 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 838 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 839 | |
| 840 | for (se = first_se; se != NULL; se = se->next) { |
| 841 | int len; |
| 842 | |
| 843 | if (se->save_live_state == NULL) |
| 844 | continue; |
| 845 | |
| 846 | /* Section type */ |
| 847 | qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 848 | qemu_put_be32(f, se->section_id); |
| 849 | |
| 850 | /* ID string */ |
| 851 | len = strlen(se->idstr); |
| 852 | qemu_put_byte(f, len); |
| 853 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 854 | |
| 855 | qemu_put_be32(f, se->instance_id); |
| 856 | qemu_put_be32(f, se->version_id); |
| 857 | |
| 858 | se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 859 | } |
| 860 | |
| 861 | if (qemu_file_has_error(f)) |
| 862 | return -EIO; |
| 863 | |
| 864 | return 0; |
| 865 | } |
| 866 | |
| 867 | int qemu_savevm_state_iterate(QEMUFile *f) |
| 868 | { |
| 869 | SaveStateEntry *se; |
| 870 | int ret = 1; |
| 871 | |
| 872 | for (se = first_se; se != NULL; se = se->next) { |
| 873 | if (se->save_live_state == NULL) |
| 874 | continue; |
| 875 | |
| 876 | /* Section type */ |
| 877 | qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 878 | qemu_put_be32(f, se->section_id); |
| 879 | |
| 880 | ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 881 | } |
| 882 | |
| 883 | if (ret) |
| 884 | return 1; |
| 885 | |
| 886 | if (qemu_file_has_error(f)) |
| 887 | return -EIO; |
| 888 | |
| 889 | return 0; |
| 890 | } |
| 891 | |
| 892 | int qemu_savevm_state_complete(QEMUFile *f) |
| 893 | { |
| 894 | SaveStateEntry *se; |
| 895 | |
| 896 | for (se = first_se; se != NULL; se = se->next) { |
| 897 | if (se->save_live_state == NULL) |
| 898 | continue; |
| 899 | |
| 900 | /* Section type */ |
| 901 | qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 902 | qemu_put_be32(f, se->section_id); |
| 903 | |
| 904 | se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 905 | } |
| 906 | |
| 907 | for(se = first_se; se != NULL; se = se->next) { |
| 908 | int len; |
| 909 | |
| 910 | if (se->save_state == NULL) |
| 911 | continue; |
| 912 | |
| 913 | /* Section type */ |
| 914 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 915 | qemu_put_be32(f, se->section_id); |
| 916 | |
| 917 | /* ID string */ |
| 918 | len = strlen(se->idstr); |
| 919 | qemu_put_byte(f, len); |
| 920 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 921 | |
| 922 | qemu_put_be32(f, se->instance_id); |
| 923 | qemu_put_be32(f, se->version_id); |
| 924 | |
| 925 | se->save_state(f, se->opaque); |
| 926 | } |
| 927 | |
| 928 | qemu_put_byte(f, QEMU_VM_EOF); |
| 929 | |
| 930 | if (qemu_file_has_error(f)) |
| 931 | return -EIO; |
| 932 | |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | int qemu_savevm_state(QEMUFile *f) |
| 937 | { |
| 938 | int saved_vm_running; |
| 939 | int ret; |
| 940 | |
| 941 | saved_vm_running = vm_running; |
| 942 | vm_stop(0); |
| 943 | |
| 944 | bdrv_flush_all(); |
| 945 | |
| 946 | ret = qemu_savevm_state_begin(f); |
| 947 | if (ret < 0) |
| 948 | goto out; |
| 949 | |
| 950 | do { |
| 951 | ret = qemu_savevm_state_iterate(f); |
| 952 | if (ret < 0) |
| 953 | goto out; |
| 954 | } while (ret == 0); |
| 955 | |
| 956 | ret = qemu_savevm_state_complete(f); |
| 957 | |
| 958 | out: |
| 959 | if (qemu_file_has_error(f)) |
| 960 | ret = -EIO; |
| 961 | |
| 962 | if (!ret && saved_vm_running) |
| 963 | vm_start(); |
| 964 | |
| 965 | return ret; |
| 966 | } |
| 967 | |
| 968 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 969 | { |
| 970 | SaveStateEntry *se; |
| 971 | |
| 972 | for(se = first_se; se != NULL; se = se->next) { |
| 973 | if (!strcmp(se->idstr, idstr) && |
| 974 | instance_id == se->instance_id) |
| 975 | return se; |
| 976 | } |
| 977 | return NULL; |
| 978 | } |
| 979 | |
| 980 | typedef struct LoadStateEntry { |
| 981 | SaveStateEntry *se; |
| 982 | int section_id; |
| 983 | int version_id; |
| 984 | struct LoadStateEntry *next; |
| 985 | } LoadStateEntry; |
| 986 | |
| 987 | static int qemu_loadvm_state_v2(QEMUFile *f) |
| 988 | { |
| 989 | SaveStateEntry *se; |
| 990 | int len, ret, instance_id, record_len, version_id; |
| 991 | int64_t total_len, end_pos, cur_pos; |
| 992 | char idstr[256]; |
| 993 | |
| 994 | total_len = qemu_get_be64(f); |
| 995 | end_pos = total_len + qemu_ftell(f); |
| 996 | for(;;) { |
| 997 | if (qemu_ftell(f) >= end_pos) |
| 998 | break; |
| 999 | len = qemu_get_byte(f); |
| 1000 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 1001 | idstr[len] = '\0'; |
| 1002 | instance_id = qemu_get_be32(f); |
| 1003 | version_id = qemu_get_be32(f); |
| 1004 | record_len = qemu_get_be32(f); |
| 1005 | cur_pos = qemu_ftell(f); |
| 1006 | se = find_se(idstr, instance_id); |
| 1007 | if (!se) { |
| 1008 | fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n", |
| 1009 | instance_id, idstr); |
| 1010 | } else { |
| 1011 | ret = se->load_state(f, se->opaque, version_id); |
| 1012 | if (ret < 0) { |
| 1013 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", |
| 1014 | instance_id, idstr); |
| 1015 | return ret; |
| 1016 | } |
| 1017 | } |
| 1018 | /* always seek to exact end of record */ |
| 1019 | qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
| 1020 | } |
| 1021 | |
| 1022 | if (qemu_file_has_error(f)) |
| 1023 | return -EIO; |
| 1024 | |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
| 1028 | int qemu_loadvm_state(QEMUFile *f) |
| 1029 | { |
| 1030 | LoadStateEntry *first_le = NULL; |
| 1031 | uint8_t section_type; |
| 1032 | unsigned int v; |
| 1033 | int ret; |
| 1034 | |
| 1035 | v = qemu_get_be32(f); |
| 1036 | if (v != QEMU_VM_FILE_MAGIC) |
| 1037 | return -EINVAL; |
| 1038 | |
| 1039 | v = qemu_get_be32(f); |
| 1040 | if (v == QEMU_VM_FILE_VERSION_COMPAT) |
| 1041 | return qemu_loadvm_state_v2(f); |
| 1042 | if (v != QEMU_VM_FILE_VERSION) |
| 1043 | return -ENOTSUP; |
| 1044 | |
| 1045 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { |
| 1046 | uint32_t instance_id, version_id, section_id; |
| 1047 | LoadStateEntry *le; |
| 1048 | SaveStateEntry *se; |
| 1049 | char idstr[257]; |
| 1050 | int len; |
| 1051 | |
| 1052 | switch (section_type) { |
| 1053 | case QEMU_VM_SECTION_START: |
| 1054 | case QEMU_VM_SECTION_FULL: |
| 1055 | /* Read section start */ |
| 1056 | section_id = qemu_get_be32(f); |
| 1057 | len = qemu_get_byte(f); |
| 1058 | qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 1059 | idstr[len] = 0; |
| 1060 | instance_id = qemu_get_be32(f); |
| 1061 | version_id = qemu_get_be32(f); |
| 1062 | |
| 1063 | /* Find savevm section */ |
| 1064 | se = find_se(idstr, instance_id); |
| 1065 | if (se == NULL) { |
| 1066 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); |
| 1067 | ret = -EINVAL; |
| 1068 | goto out; |
| 1069 | } |
| 1070 | |
| 1071 | /* Validate version */ |
| 1072 | if (version_id > se->version_id) { |
| 1073 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", |
| 1074 | version_id, idstr, se->version_id); |
| 1075 | ret = -EINVAL; |
| 1076 | goto out; |
| 1077 | } |
| 1078 | |
| 1079 | /* Add entry */ |
| 1080 | le = qemu_mallocz(sizeof(*le)); |
| 1081 | |
| 1082 | le->se = se; |
| 1083 | le->section_id = section_id; |
| 1084 | le->version_id = version_id; |
| 1085 | le->next = first_le; |
| 1086 | first_le = le; |
| 1087 | |
| 1088 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 1089 | break; |
| 1090 | case QEMU_VM_SECTION_PART: |
| 1091 | case QEMU_VM_SECTION_END: |
| 1092 | section_id = qemu_get_be32(f); |
| 1093 | |
| 1094 | for (le = first_le; le && le->section_id != section_id; le = le->next); |
| 1095 | if (le == NULL) { |
| 1096 | fprintf(stderr, "Unknown savevm section %d\n", section_id); |
| 1097 | ret = -EINVAL; |
| 1098 | goto out; |
| 1099 | } |
| 1100 | |
| 1101 | le->se->load_state(f, le->se->opaque, le->version_id); |
| 1102 | break; |
| 1103 | default: |
| 1104 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); |
| 1105 | ret = -EINVAL; |
| 1106 | goto out; |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | ret = 0; |
| 1111 | |
| 1112 | out: |
| 1113 | while (first_le) { |
| 1114 | LoadStateEntry *le = first_le; |
| 1115 | first_le = first_le->next; |
| 1116 | qemu_free(le); |
| 1117 | } |
| 1118 | |
| 1119 | if (qemu_file_has_error(f)) |
| 1120 | ret = -EIO; |
| 1121 | |
| 1122 | return ret; |
| 1123 | } |
| 1124 | |
| 1125 | /* device can contain snapshots */ |
| 1126 | static int bdrv_can_snapshot(BlockDriverState *bs) |
| 1127 | { |
| 1128 | return (bs && |
| 1129 | !bdrv_is_removable(bs) && |
| 1130 | !bdrv_is_read_only(bs)); |
| 1131 | } |
| 1132 | |
| 1133 | /* device must be snapshots in order to have a reliable snapshot */ |
| 1134 | static int bdrv_has_snapshot(BlockDriverState *bs) |
| 1135 | { |
| 1136 | return (bs && |
| 1137 | !bdrv_is_removable(bs) && |
| 1138 | !bdrv_is_read_only(bs)); |
| 1139 | } |
| 1140 | |
| 1141 | static BlockDriverState *get_bs_snapshots(void) |
| 1142 | { |
| 1143 | BlockDriverState *bs; |
| 1144 | int i; |
| 1145 | |
| 1146 | if (bs_snapshots) |
| 1147 | return bs_snapshots; |
| 1148 | for(i = 0; i <= nb_drives; i++) { |
| 1149 | bs = drives_table[i].bdrv; |
| 1150 | if (bdrv_can_snapshot(bs)) |
| 1151 | goto ok; |
| 1152 | } |
| 1153 | return NULL; |
| 1154 | ok: |
| 1155 | bs_snapshots = bs; |
| 1156 | return bs; |
| 1157 | } |
| 1158 | |
| 1159 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 1160 | const char *name) |
| 1161 | { |
| 1162 | QEMUSnapshotInfo *sn_tab, *sn; |
| 1163 | int nb_sns, i, ret; |
| 1164 | |
| 1165 | ret = -ENOENT; |
| 1166 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1167 | if (nb_sns < 0) |
| 1168 | return ret; |
| 1169 | for(i = 0; i < nb_sns; i++) { |
| 1170 | sn = &sn_tab[i]; |
| 1171 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { |
| 1172 | *sn_info = *sn; |
| 1173 | ret = 0; |
| 1174 | break; |
| 1175 | } |
| 1176 | } |
| 1177 | qemu_free(sn_tab); |
| 1178 | return ret; |
| 1179 | } |
| 1180 | |
| 1181 | void do_savevm(Monitor *mon, const char *name) |
| 1182 | { |
| 1183 | BlockDriverState *bs, *bs1; |
| 1184 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1185 | int must_delete, ret, i; |
| 1186 | BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1187 | QEMUFile *f; |
| 1188 | int saved_vm_running; |
| 1189 | uint32_t vm_state_size; |
| 1190 | #ifdef _WIN32 |
| 1191 | struct _timeb tb; |
| 1192 | #else |
| 1193 | struct timeval tv; |
| 1194 | #endif |
| 1195 | |
| 1196 | bs = get_bs_snapshots(); |
| 1197 | if (!bs) { |
| 1198 | monitor_printf(mon, "No block device can accept snapshots\n"); |
| 1199 | return; |
| 1200 | } |
| 1201 | |
| 1202 | /* ??? Should this occur after vm_stop? */ |
| 1203 | qemu_aio_flush(); |
| 1204 | |
| 1205 | saved_vm_running = vm_running; |
| 1206 | vm_stop(0); |
| 1207 | |
| 1208 | must_delete = 0; |
| 1209 | if (name) { |
| 1210 | ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1211 | if (ret >= 0) { |
| 1212 | must_delete = 1; |
| 1213 | } |
| 1214 | } |
| 1215 | memset(sn, 0, sizeof(*sn)); |
| 1216 | if (must_delete) { |
| 1217 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); |
| 1218 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); |
| 1219 | } else { |
| 1220 | if (name) |
| 1221 | pstrcpy(sn->name, sizeof(sn->name), name); |
| 1222 | } |
| 1223 | |
| 1224 | /* fill auxiliary fields */ |
| 1225 | #ifdef _WIN32 |
| 1226 | _ftime(&tb); |
| 1227 | sn->date_sec = tb.time; |
| 1228 | sn->date_nsec = tb.millitm * 1000000; |
| 1229 | #else |
| 1230 | gettimeofday(&tv, NULL); |
| 1231 | sn->date_sec = tv.tv_sec; |
| 1232 | sn->date_nsec = tv.tv_usec * 1000; |
| 1233 | #endif |
| 1234 | sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1235 | |
| 1236 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1237 | monitor_printf(mon, "Device %s does not support VM state snapshots\n", |
| 1238 | bdrv_get_device_name(bs)); |
| 1239 | goto the_end; |
| 1240 | } |
| 1241 | |
| 1242 | /* save the VM state */ |
| 1243 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1); |
| 1244 | if (!f) { |
| 1245 | monitor_printf(mon, "Could not open VM state file\n"); |
| 1246 | goto the_end; |
| 1247 | } |
| 1248 | ret = qemu_savevm_state(f); |
| 1249 | vm_state_size = qemu_ftell(f); |
| 1250 | qemu_fclose(f); |
| 1251 | if (ret < 0) { |
| 1252 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
| 1253 | goto the_end; |
| 1254 | } |
| 1255 | |
| 1256 | /* create the snapshots */ |
| 1257 | |
| 1258 | for(i = 0; i < nb_drives; i++) { |
| 1259 | bs1 = drives_table[i].bdrv; |
| 1260 | if (bdrv_has_snapshot(bs1)) { |
| 1261 | if (must_delete) { |
| 1262 | ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
| 1263 | if (ret < 0) { |
| 1264 | monitor_printf(mon, |
| 1265 | "Error while deleting snapshot on '%s'\n", |
| 1266 | bdrv_get_device_name(bs1)); |
| 1267 | } |
| 1268 | } |
| 1269 | /* Write VM state size only to the image that contains the state */ |
| 1270 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); |
| 1271 | ret = bdrv_snapshot_create(bs1, sn); |
| 1272 | if (ret < 0) { |
| 1273 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
| 1274 | bdrv_get_device_name(bs1)); |
| 1275 | } |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | the_end: |
| 1280 | if (saved_vm_running) |
| 1281 | vm_start(); |
| 1282 | } |
| 1283 | |
| 1284 | void do_loadvm(Monitor *mon, const char *name) |
| 1285 | { |
| 1286 | BlockDriverState *bs, *bs1; |
| 1287 | BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1288 | QEMUSnapshotInfo sn; |
| 1289 | QEMUFile *f; |
| 1290 | int i, ret; |
| 1291 | int saved_vm_running; |
| 1292 | |
| 1293 | bs = get_bs_snapshots(); |
| 1294 | if (!bs) { |
| 1295 | monitor_printf(mon, "No block device supports snapshots\n"); |
| 1296 | return; |
| 1297 | } |
| 1298 | |
| 1299 | /* Flush all IO requests so they don't interfere with the new state. */ |
| 1300 | qemu_aio_flush(); |
| 1301 | |
| 1302 | saved_vm_running = vm_running; |
| 1303 | vm_stop(0); |
| 1304 | |
| 1305 | for(i = 0; i <= nb_drives; i++) { |
| 1306 | bs1 = drives_table[i].bdrv; |
| 1307 | if (bdrv_has_snapshot(bs1)) { |
| 1308 | ret = bdrv_snapshot_goto(bs1, name); |
| 1309 | if (ret < 0) { |
| 1310 | if (bs != bs1) |
| 1311 | monitor_printf(mon, "Warning: "); |
| 1312 | switch(ret) { |
| 1313 | case -ENOTSUP: |
| 1314 | monitor_printf(mon, |
| 1315 | "Snapshots not supported on device '%s'\n", |
| 1316 | bdrv_get_device_name(bs1)); |
| 1317 | break; |
| 1318 | case -ENOENT: |
| 1319 | monitor_printf(mon, "Could not find snapshot '%s' on " |
| 1320 | "device '%s'\n", |
| 1321 | name, bdrv_get_device_name(bs1)); |
| 1322 | break; |
| 1323 | default: |
| 1324 | monitor_printf(mon, "Error %d while activating snapshot on" |
| 1325 | " '%s'\n", ret, bdrv_get_device_name(bs1)); |
| 1326 | break; |
| 1327 | } |
| 1328 | /* fatal on snapshot block device */ |
| 1329 | if (bs == bs1) |
| 1330 | goto the_end; |
| 1331 | } |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1336 | monitor_printf(mon, "Device %s does not support VM state snapshots\n", |
| 1337 | bdrv_get_device_name(bs)); |
| 1338 | return; |
| 1339 | } |
| 1340 | |
| 1341 | /* Don't even try to load empty VM states */ |
| 1342 | ret = bdrv_snapshot_find(bs, &sn, name); |
| 1343 | if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1344 | goto the_end; |
| 1345 | |
| 1346 | /* restore the VM state */ |
| 1347 | f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0); |
| 1348 | if (!f) { |
| 1349 | monitor_printf(mon, "Could not open VM state file\n"); |
| 1350 | goto the_end; |
| 1351 | } |
| 1352 | ret = qemu_loadvm_state(f); |
| 1353 | qemu_fclose(f); |
| 1354 | if (ret < 0) { |
| 1355 | monitor_printf(mon, "Error %d while loading VM state\n", ret); |
| 1356 | } |
| 1357 | the_end: |
| 1358 | if (saved_vm_running) |
| 1359 | vm_start(); |
| 1360 | } |
| 1361 | |
| 1362 | void do_delvm(Monitor *mon, const char *name) |
| 1363 | { |
| 1364 | BlockDriverState *bs, *bs1; |
| 1365 | int i, ret; |
| 1366 | |
| 1367 | bs = get_bs_snapshots(); |
| 1368 | if (!bs) { |
| 1369 | monitor_printf(mon, "No block device supports snapshots\n"); |
| 1370 | return; |
| 1371 | } |
| 1372 | |
| 1373 | for(i = 0; i <= nb_drives; i++) { |
| 1374 | bs1 = drives_table[i].bdrv; |
| 1375 | if (bdrv_has_snapshot(bs1)) { |
| 1376 | ret = bdrv_snapshot_delete(bs1, name); |
| 1377 | if (ret < 0) { |
| 1378 | if (ret == -ENOTSUP) |
| 1379 | monitor_printf(mon, |
| 1380 | "Snapshots not supported on device '%s'\n", |
| 1381 | bdrv_get_device_name(bs1)); |
| 1382 | else |
| 1383 | monitor_printf(mon, "Error %d while deleting snapshot on " |
| 1384 | "'%s'\n", ret, bdrv_get_device_name(bs1)); |
| 1385 | } |
| 1386 | } |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | void do_info_snapshots(Monitor *mon) |
| 1391 | { |
| 1392 | BlockDriverState *bs, *bs1; |
| 1393 | QEMUSnapshotInfo *sn_tab, *sn; |
| 1394 | int nb_sns, i; |
| 1395 | char buf[256]; |
| 1396 | |
| 1397 | bs = get_bs_snapshots(); |
| 1398 | if (!bs) { |
| 1399 | monitor_printf(mon, "No available block device supports snapshots\n"); |
| 1400 | return; |
| 1401 | } |
| 1402 | monitor_printf(mon, "Snapshot devices:"); |
| 1403 | for(i = 0; i <= nb_drives; i++) { |
| 1404 | bs1 = drives_table[i].bdrv; |
| 1405 | if (bdrv_has_snapshot(bs1)) { |
| 1406 | if (bs == bs1) |
| 1407 | monitor_printf(mon, " %s", bdrv_get_device_name(bs1)); |
| 1408 | } |
| 1409 | } |
| 1410 | monitor_printf(mon, "\n"); |
| 1411 | |
| 1412 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1413 | if (nb_sns < 0) { |
| 1414 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
| 1415 | return; |
| 1416 | } |
| 1417 | monitor_printf(mon, "Snapshot list (from %s):\n", |
| 1418 | bdrv_get_device_name(bs)); |
| 1419 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1420 | for(i = 0; i < nb_sns; i++) { |
| 1421 | sn = &sn_tab[i]; |
| 1422 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1423 | } |
| 1424 | qemu_free(sn_tab); |
| 1425 | } |