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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 | ||
25 | #include "config-host.h" | |
26 | #include "qemu-common.h" | |
27 | #include "hw/hw.h" | |
28 | #include "hw/qdev.h" | |
29 | #include "net/net.h" | |
30 | #include "monitor/monitor.h" | |
31 | #include "sysemu/sysemu.h" | |
32 | #include "qemu/timer.h" | |
33 | #include "audio/audio.h" | |
34 | #include "migration/migration.h" | |
35 | #include "qemu/sockets.h" | |
36 | #include "qemu/queue.h" | |
37 | #include "sysemu/cpus.h" | |
38 | #include "exec/memory.h" | |
39 | #include "qmp-commands.h" | |
40 | #include "trace.h" | |
41 | #include "qemu/bitops.h" | |
42 | #include "qemu/iov.h" | |
43 | #include "block/snapshot.h" | |
44 | #include "block/qapi.h" | |
45 | ||
46 | #define SELF_ANNOUNCE_ROUNDS 5 | |
47 | ||
48 | #ifndef ETH_P_RARP | |
49 | #define ETH_P_RARP 0x8035 | |
50 | #endif | |
51 | #define ARP_HTYPE_ETH 0x0001 | |
52 | #define ARP_PTYPE_IP 0x0800 | |
53 | #define ARP_OP_REQUEST_REV 0x3 | |
54 | ||
55 | static int announce_self_create(uint8_t *buf, | |
56 | uint8_t *mac_addr) | |
57 | { | |
58 | /* Ethernet header. */ | |
59 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
60 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
61 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
62 | ||
63 | /* RARP header. */ | |
64 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
65 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
66 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
67 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
68 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
69 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
70 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
71 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
72 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
73 | ||
74 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
75 | memset(buf + 42, 0x00, 18); | |
76 | ||
77 | return 60; /* len (FCS will be added by hardware) */ | |
78 | } | |
79 | ||
80 | static void qemu_announce_self_iter(NICState *nic, void *opaque) | |
81 | { | |
82 | uint8_t buf[60]; | |
83 | int len; | |
84 | ||
85 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
86 | ||
87 | qemu_send_packet_raw(qemu_get_queue(nic), buf, len); | |
88 | } | |
89 | ||
90 | ||
91 | static void qemu_announce_self_once(void *opaque) | |
92 | { | |
93 | static int count = SELF_ANNOUNCE_ROUNDS; | |
94 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
95 | ||
96 | qemu_foreach_nic(qemu_announce_self_iter, NULL); | |
97 | ||
98 | if (--count) { | |
99 | /* delay 50ms, 150ms, 250ms, ... */ | |
100 | timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + | |
101 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); | |
102 | } else { | |
103 | timer_del(timer); | |
104 | timer_free(timer); | |
105 | } | |
106 | } | |
107 | ||
108 | void qemu_announce_self(void) | |
109 | { | |
110 | static QEMUTimer *timer; | |
111 | timer = timer_new_ms(QEMU_CLOCK_REALTIME, qemu_announce_self_once, &timer); | |
112 | qemu_announce_self_once(&timer); | |
113 | } | |
114 | ||
115 | /***********************************************************/ | |
116 | /* savevm/loadvm support */ | |
117 | ||
118 | #define IO_BUF_SIZE 32768 | |
119 | #define MAX_IOV_SIZE MIN(IOV_MAX, 64) | |
120 | ||
121 | struct QEMUFile { | |
122 | const QEMUFileOps *ops; | |
123 | void *opaque; | |
124 | ||
125 | int64_t bytes_xfer; | |
126 | int64_t xfer_limit; | |
127 | ||
128 | int64_t pos; /* start of buffer when writing, end of buffer | |
129 | when reading */ | |
130 | int buf_index; | |
131 | int buf_size; /* 0 when writing */ | |
132 | uint8_t buf[IO_BUF_SIZE]; | |
133 | ||
134 | struct iovec iov[MAX_IOV_SIZE]; | |
135 | unsigned int iovcnt; | |
136 | ||
137 | int last_error; | |
138 | }; | |
139 | ||
140 | typedef struct QEMUFileStdio | |
141 | { | |
142 | FILE *stdio_file; | |
143 | QEMUFile *file; | |
144 | } QEMUFileStdio; | |
145 | ||
146 | typedef struct QEMUFileSocket | |
147 | { | |
148 | int fd; | |
149 | QEMUFile *file; | |
150 | } QEMUFileSocket; | |
151 | ||
152 | static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt, | |
153 | int64_t pos) | |
154 | { | |
155 | QEMUFileSocket *s = opaque; | |
156 | ssize_t len; | |
157 | ssize_t size = iov_size(iov, iovcnt); | |
158 | ||
159 | len = iov_send(s->fd, iov, iovcnt, 0, size); | |
160 | if (len < size) { | |
161 | len = -socket_error(); | |
162 | } | |
163 | return len; | |
164 | } | |
165 | ||
166 | static int socket_get_fd(void *opaque) | |
167 | { | |
168 | QEMUFileSocket *s = opaque; | |
169 | ||
170 | return s->fd; | |
171 | } | |
172 | ||
173 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
174 | { | |
175 | QEMUFileSocket *s = opaque; | |
176 | ssize_t len; | |
177 | ||
178 | for (;;) { | |
179 | len = qemu_recv(s->fd, buf, size, 0); | |
180 | if (len != -1) { | |
181 | break; | |
182 | } | |
183 | if (socket_error() == EAGAIN) { | |
184 | yield_until_fd_readable(s->fd); | |
185 | } else if (socket_error() != EINTR) { | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | if (len == -1) { | |
191 | len = -socket_error(); | |
192 | } | |
193 | return len; | |
194 | } | |
195 | ||
196 | static int socket_close(void *opaque) | |
197 | { | |
198 | QEMUFileSocket *s = opaque; | |
199 | closesocket(s->fd); | |
200 | g_free(s); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int stdio_get_fd(void *opaque) | |
205 | { | |
206 | QEMUFileStdio *s = opaque; | |
207 | ||
208 | return fileno(s->stdio_file); | |
209 | } | |
210 | ||
211 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) | |
212 | { | |
213 | QEMUFileStdio *s = opaque; | |
214 | return fwrite(buf, 1, size, s->stdio_file); | |
215 | } | |
216 | ||
217 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
218 | { | |
219 | QEMUFileStdio *s = opaque; | |
220 | FILE *fp = s->stdio_file; | |
221 | int bytes; | |
222 | ||
223 | for (;;) { | |
224 | clearerr(fp); | |
225 | bytes = fread(buf, 1, size, fp); | |
226 | if (bytes != 0 || !ferror(fp)) { | |
227 | break; | |
228 | } | |
229 | if (errno == EAGAIN) { | |
230 | yield_until_fd_readable(fileno(fp)); | |
231 | } else if (errno != EINTR) { | |
232 | break; | |
233 | } | |
234 | } | |
235 | return bytes; | |
236 | } | |
237 | ||
238 | static int stdio_pclose(void *opaque) | |
239 | { | |
240 | QEMUFileStdio *s = opaque; | |
241 | int ret; | |
242 | ret = pclose(s->stdio_file); | |
243 | if (ret == -1) { | |
244 | ret = -errno; | |
245 | } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { | |
246 | /* close succeeded, but non-zero exit code: */ | |
247 | ret = -EIO; /* fake errno value */ | |
248 | } | |
249 | g_free(s); | |
250 | return ret; | |
251 | } | |
252 | ||
253 | static int stdio_fclose(void *opaque) | |
254 | { | |
255 | QEMUFileStdio *s = opaque; | |
256 | int ret = 0; | |
257 | ||
258 | if (s->file->ops->put_buffer || s->file->ops->writev_buffer) { | |
259 | int fd = fileno(s->stdio_file); | |
260 | struct stat st; | |
261 | ||
262 | ret = fstat(fd, &st); | |
263 | if (ret == 0 && S_ISREG(st.st_mode)) { | |
264 | /* | |
265 | * If the file handle is a regular file make sure the | |
266 | * data is flushed to disk before signaling success. | |
267 | */ | |
268 | ret = fsync(fd); | |
269 | if (ret != 0) { | |
270 | ret = -errno; | |
271 | return ret; | |
272 | } | |
273 | } | |
274 | } | |
275 | if (fclose(s->stdio_file) == EOF) { | |
276 | ret = -errno; | |
277 | } | |
278 | g_free(s); | |
279 | return ret; | |
280 | } | |
281 | ||
282 | static const QEMUFileOps stdio_pipe_read_ops = { | |
283 | .get_fd = stdio_get_fd, | |
284 | .get_buffer = stdio_get_buffer, | |
285 | .close = stdio_pclose | |
286 | }; | |
287 | ||
288 | static const QEMUFileOps stdio_pipe_write_ops = { | |
289 | .get_fd = stdio_get_fd, | |
290 | .put_buffer = stdio_put_buffer, | |
291 | .close = stdio_pclose | |
292 | }; | |
293 | ||
294 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
295 | { | |
296 | FILE *stdio_file; | |
297 | QEMUFileStdio *s; | |
298 | ||
299 | if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { | |
300 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); | |
301 | return NULL; | |
302 | } | |
303 | ||
304 | stdio_file = popen(command, mode); | |
305 | if (stdio_file == NULL) { | |
306 | return NULL; | |
307 | } | |
308 | ||
309 | s = g_malloc0(sizeof(QEMUFileStdio)); | |
310 | ||
311 | s->stdio_file = stdio_file; | |
312 | ||
313 | if(mode[0] == 'r') { | |
314 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); | |
315 | } else { | |
316 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); | |
317 | } | |
318 | return s->file; | |
319 | } | |
320 | ||
321 | static const QEMUFileOps stdio_file_read_ops = { | |
322 | .get_fd = stdio_get_fd, | |
323 | .get_buffer = stdio_get_buffer, | |
324 | .close = stdio_fclose | |
325 | }; | |
326 | ||
327 | static const QEMUFileOps stdio_file_write_ops = { | |
328 | .get_fd = stdio_get_fd, | |
329 | .put_buffer = stdio_put_buffer, | |
330 | .close = stdio_fclose | |
331 | }; | |
332 | ||
333 | static ssize_t unix_writev_buffer(void *opaque, struct iovec *iov, int iovcnt, | |
334 | int64_t pos) | |
335 | { | |
336 | QEMUFileSocket *s = opaque; | |
337 | ssize_t len, offset; | |
338 | ssize_t size = iov_size(iov, iovcnt); | |
339 | ssize_t total = 0; | |
340 | ||
341 | assert(iovcnt > 0); | |
342 | offset = 0; | |
343 | while (size > 0) { | |
344 | /* Find the next start position; skip all full-sized vector elements */ | |
345 | while (offset >= iov[0].iov_len) { | |
346 | offset -= iov[0].iov_len; | |
347 | iov++, iovcnt--; | |
348 | } | |
349 | ||
350 | /* skip `offset' bytes from the (now) first element, undo it on exit */ | |
351 | assert(iovcnt > 0); | |
352 | iov[0].iov_base += offset; | |
353 | iov[0].iov_len -= offset; | |
354 | ||
355 | do { | |
356 | len = writev(s->fd, iov, iovcnt); | |
357 | } while (len == -1 && errno == EINTR); | |
358 | if (len == -1) { | |
359 | return -errno; | |
360 | } | |
361 | ||
362 | /* Undo the changes above */ | |
363 | iov[0].iov_base -= offset; | |
364 | iov[0].iov_len += offset; | |
365 | ||
366 | /* Prepare for the next iteration */ | |
367 | offset += len; | |
368 | total += len; | |
369 | size -= len; | |
370 | } | |
371 | ||
372 | return total; | |
373 | } | |
374 | ||
375 | static int unix_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
376 | { | |
377 | QEMUFileSocket *s = opaque; | |
378 | ssize_t len; | |
379 | ||
380 | for (;;) { | |
381 | len = read(s->fd, buf, size); | |
382 | if (len != -1) { | |
383 | break; | |
384 | } | |
385 | if (errno == EAGAIN) { | |
386 | yield_until_fd_readable(s->fd); | |
387 | } else if (errno != EINTR) { | |
388 | break; | |
389 | } | |
390 | } | |
391 | ||
392 | if (len == -1) { | |
393 | len = -errno; | |
394 | } | |
395 | return len; | |
396 | } | |
397 | ||
398 | static int unix_close(void *opaque) | |
399 | { | |
400 | QEMUFileSocket *s = opaque; | |
401 | close(s->fd); | |
402 | g_free(s); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static const QEMUFileOps unix_read_ops = { | |
407 | .get_fd = socket_get_fd, | |
408 | .get_buffer = unix_get_buffer, | |
409 | .close = unix_close | |
410 | }; | |
411 | ||
412 | static const QEMUFileOps unix_write_ops = { | |
413 | .get_fd = socket_get_fd, | |
414 | .writev_buffer = unix_writev_buffer, | |
415 | .close = unix_close | |
416 | }; | |
417 | ||
418 | QEMUFile *qemu_fdopen(int fd, const char *mode) | |
419 | { | |
420 | QEMUFileSocket *s; | |
421 | ||
422 | if (mode == NULL || | |
423 | (mode[0] != 'r' && mode[0] != 'w') || | |
424 | mode[1] != 'b' || mode[2] != 0) { | |
425 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
426 | return NULL; | |
427 | } | |
428 | ||
429 | s = g_malloc0(sizeof(QEMUFileSocket)); | |
430 | s->fd = fd; | |
431 | ||
432 | if(mode[0] == 'r') { | |
433 | s->file = qemu_fopen_ops(s, &unix_read_ops); | |
434 | } else { | |
435 | s->file = qemu_fopen_ops(s, &unix_write_ops); | |
436 | } | |
437 | return s->file; | |
438 | } | |
439 | ||
440 | static const QEMUFileOps socket_read_ops = { | |
441 | .get_fd = socket_get_fd, | |
442 | .get_buffer = socket_get_buffer, | |
443 | .close = socket_close | |
444 | }; | |
445 | ||
446 | static const QEMUFileOps socket_write_ops = { | |
447 | .get_fd = socket_get_fd, | |
448 | .writev_buffer = socket_writev_buffer, | |
449 | .close = socket_close | |
450 | }; | |
451 | ||
452 | bool qemu_file_mode_is_not_valid(const char *mode) | |
453 | { | |
454 | if (mode == NULL || | |
455 | (mode[0] != 'r' && mode[0] != 'w') || | |
456 | mode[1] != 'b' || mode[2] != 0) { | |
457 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); | |
458 | return true; | |
459 | } | |
460 | ||
461 | return false; | |
462 | } | |
463 | ||
464 | QEMUFile *qemu_fopen_socket(int fd, const char *mode) | |
465 | { | |
466 | QEMUFileSocket *s; | |
467 | ||
468 | if (qemu_file_mode_is_not_valid(mode)) { | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | s = g_malloc0(sizeof(QEMUFileSocket)); | |
473 | s->fd = fd; | |
474 | if (mode[0] == 'w') { | |
475 | qemu_set_block(s->fd); | |
476 | s->file = qemu_fopen_ops(s, &socket_write_ops); | |
477 | } else { | |
478 | s->file = qemu_fopen_ops(s, &socket_read_ops); | |
479 | } | |
480 | return s->file; | |
481 | } | |
482 | ||
483 | QEMUFile *qemu_fopen(const char *filename, const char *mode) | |
484 | { | |
485 | QEMUFileStdio *s; | |
486 | ||
487 | if (qemu_file_mode_is_not_valid(mode)) { | |
488 | return NULL; | |
489 | } | |
490 | ||
491 | s = g_malloc0(sizeof(QEMUFileStdio)); | |
492 | ||
493 | s->stdio_file = fopen(filename, mode); | |
494 | if (!s->stdio_file) | |
495 | goto fail; | |
496 | ||
497 | if(mode[0] == 'w') { | |
498 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); | |
499 | } else { | |
500 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); | |
501 | } | |
502 | return s->file; | |
503 | fail: | |
504 | g_free(s); | |
505 | return NULL; | |
506 | } | |
507 | ||
508 | static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt, | |
509 | int64_t pos) | |
510 | { | |
511 | int ret; | |
512 | QEMUIOVector qiov; | |
513 | ||
514 | qemu_iovec_init_external(&qiov, iov, iovcnt); | |
515 | ret = bdrv_writev_vmstate(opaque, &qiov, pos); | |
516 | if (ret < 0) { | |
517 | return ret; | |
518 | } | |
519 | ||
520 | return qiov.size; | |
521 | } | |
522 | ||
523 | static int block_put_buffer(void *opaque, const uint8_t *buf, | |
524 | int64_t pos, int size) | |
525 | { | |
526 | bdrv_save_vmstate(opaque, buf, pos, size); | |
527 | return size; | |
528 | } | |
529 | ||
530 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
531 | { | |
532 | return bdrv_load_vmstate(opaque, buf, pos, size); | |
533 | } | |
534 | ||
535 | static int bdrv_fclose(void *opaque) | |
536 | { | |
537 | return bdrv_flush(opaque); | |
538 | } | |
539 | ||
540 | static const QEMUFileOps bdrv_read_ops = { | |
541 | .get_buffer = block_get_buffer, | |
542 | .close = bdrv_fclose | |
543 | }; | |
544 | ||
545 | static const QEMUFileOps bdrv_write_ops = { | |
546 | .put_buffer = block_put_buffer, | |
547 | .writev_buffer = block_writev_buffer, | |
548 | .close = bdrv_fclose | |
549 | }; | |
550 | ||
551 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) | |
552 | { | |
553 | if (is_writable) | |
554 | return qemu_fopen_ops(bs, &bdrv_write_ops); | |
555 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
556 | } | |
557 | ||
558 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) | |
559 | { | |
560 | QEMUFile *f; | |
561 | ||
562 | f = g_malloc0(sizeof(QEMUFile)); | |
563 | ||
564 | f->opaque = opaque; | |
565 | f->ops = ops; | |
566 | return f; | |
567 | } | |
568 | ||
569 | int qemu_file_get_error(QEMUFile *f) | |
570 | { | |
571 | return f->last_error; | |
572 | } | |
573 | ||
574 | static void qemu_file_set_error(QEMUFile *f, int ret) | |
575 | { | |
576 | if (f->last_error == 0) { | |
577 | f->last_error = ret; | |
578 | } | |
579 | } | |
580 | ||
581 | static inline bool qemu_file_is_writable(QEMUFile *f) | |
582 | { | |
583 | return f->ops->writev_buffer || f->ops->put_buffer; | |
584 | } | |
585 | ||
586 | /** | |
587 | * Flushes QEMUFile buffer | |
588 | * | |
589 | * If there is writev_buffer QEMUFileOps it uses it otherwise uses | |
590 | * put_buffer ops. | |
591 | */ | |
592 | void qemu_fflush(QEMUFile *f) | |
593 | { | |
594 | ssize_t ret = 0; | |
595 | ||
596 | if (!qemu_file_is_writable(f)) { | |
597 | return; | |
598 | } | |
599 | ||
600 | if (f->ops->writev_buffer) { | |
601 | if (f->iovcnt > 0) { | |
602 | ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos); | |
603 | } | |
604 | } else { | |
605 | if (f->buf_index > 0) { | |
606 | ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index); | |
607 | } | |
608 | } | |
609 | if (ret >= 0) { | |
610 | f->pos += ret; | |
611 | } | |
612 | f->buf_index = 0; | |
613 | f->iovcnt = 0; | |
614 | if (ret < 0) { | |
615 | qemu_file_set_error(f, ret); | |
616 | } | |
617 | } | |
618 | ||
619 | void ram_control_before_iterate(QEMUFile *f, uint64_t flags) | |
620 | { | |
621 | int ret = 0; | |
622 | ||
623 | if (f->ops->before_ram_iterate) { | |
624 | ret = f->ops->before_ram_iterate(f, f->opaque, flags); | |
625 | if (ret < 0) { | |
626 | qemu_file_set_error(f, ret); | |
627 | } | |
628 | } | |
629 | } | |
630 | ||
631 | void ram_control_after_iterate(QEMUFile *f, uint64_t flags) | |
632 | { | |
633 | int ret = 0; | |
634 | ||
635 | if (f->ops->after_ram_iterate) { | |
636 | ret = f->ops->after_ram_iterate(f, f->opaque, flags); | |
637 | if (ret < 0) { | |
638 | qemu_file_set_error(f, ret); | |
639 | } | |
640 | } | |
641 | } | |
642 | ||
643 | void ram_control_load_hook(QEMUFile *f, uint64_t flags) | |
644 | { | |
645 | int ret = 0; | |
646 | ||
647 | if (f->ops->hook_ram_load) { | |
648 | ret = f->ops->hook_ram_load(f, f->opaque, flags); | |
649 | if (ret < 0) { | |
650 | qemu_file_set_error(f, ret); | |
651 | } | |
652 | } else { | |
653 | qemu_file_set_error(f, ret); | |
654 | } | |
655 | } | |
656 | ||
657 | size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, | |
658 | ram_addr_t offset, size_t size, int *bytes_sent) | |
659 | { | |
660 | if (f->ops->save_page) { | |
661 | int ret = f->ops->save_page(f, f->opaque, block_offset, | |
662 | offset, size, bytes_sent); | |
663 | ||
664 | if (ret != RAM_SAVE_CONTROL_DELAYED) { | |
665 | if (bytes_sent && *bytes_sent > 0) { | |
666 | qemu_update_position(f, *bytes_sent); | |
667 | } else if (ret < 0) { | |
668 | qemu_file_set_error(f, ret); | |
669 | } | |
670 | } | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | return RAM_SAVE_CONTROL_NOT_SUPP; | |
676 | } | |
677 | ||
678 | static void qemu_fill_buffer(QEMUFile *f) | |
679 | { | |
680 | int len; | |
681 | int pending; | |
682 | ||
683 | assert(!qemu_file_is_writable(f)); | |
684 | ||
685 | pending = f->buf_size - f->buf_index; | |
686 | if (pending > 0) { | |
687 | memmove(f->buf, f->buf + f->buf_index, pending); | |
688 | } | |
689 | f->buf_index = 0; | |
690 | f->buf_size = pending; | |
691 | ||
692 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, | |
693 | IO_BUF_SIZE - pending); | |
694 | if (len > 0) { | |
695 | f->buf_size += len; | |
696 | f->pos += len; | |
697 | } else if (len == 0) { | |
698 | qemu_file_set_error(f, -EIO); | |
699 | } else if (len != -EAGAIN) | |
700 | qemu_file_set_error(f, len); | |
701 | } | |
702 | ||
703 | int qemu_get_fd(QEMUFile *f) | |
704 | { | |
705 | if (f->ops->get_fd) { | |
706 | return f->ops->get_fd(f->opaque); | |
707 | } | |
708 | return -1; | |
709 | } | |
710 | ||
711 | void qemu_update_position(QEMUFile *f, size_t size) | |
712 | { | |
713 | f->pos += size; | |
714 | } | |
715 | ||
716 | /** Closes the file | |
717 | * | |
718 | * Returns negative error value if any error happened on previous operations or | |
719 | * while closing the file. Returns 0 or positive number on success. | |
720 | * | |
721 | * The meaning of return value on success depends on the specific backend | |
722 | * being used. | |
723 | */ | |
724 | int qemu_fclose(QEMUFile *f) | |
725 | { | |
726 | int ret; | |
727 | qemu_fflush(f); | |
728 | ret = qemu_file_get_error(f); | |
729 | ||
730 | if (f->ops->close) { | |
731 | int ret2 = f->ops->close(f->opaque); | |
732 | if (ret >= 0) { | |
733 | ret = ret2; | |
734 | } | |
735 | } | |
736 | /* If any error was spotted before closing, we should report it | |
737 | * instead of the close() return value. | |
738 | */ | |
739 | if (f->last_error) { | |
740 | ret = f->last_error; | |
741 | } | |
742 | g_free(f); | |
743 | return ret; | |
744 | } | |
745 | ||
746 | static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size) | |
747 | { | |
748 | /* check for adjacent buffer and coalesce them */ | |
749 | if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base + | |
750 | f->iov[f->iovcnt - 1].iov_len) { | |
751 | f->iov[f->iovcnt - 1].iov_len += size; | |
752 | } else { | |
753 | f->iov[f->iovcnt].iov_base = (uint8_t *)buf; | |
754 | f->iov[f->iovcnt++].iov_len = size; | |
755 | } | |
756 | ||
757 | if (f->iovcnt >= MAX_IOV_SIZE) { | |
758 | qemu_fflush(f); | |
759 | } | |
760 | } | |
761 | ||
762 | void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size) | |
763 | { | |
764 | if (!f->ops->writev_buffer) { | |
765 | qemu_put_buffer(f, buf, size); | |
766 | return; | |
767 | } | |
768 | ||
769 | if (f->last_error) { | |
770 | return; | |
771 | } | |
772 | ||
773 | f->bytes_xfer += size; | |
774 | add_to_iovec(f, buf, size); | |
775 | } | |
776 | ||
777 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
778 | { | |
779 | int l; | |
780 | ||
781 | if (f->last_error) { | |
782 | return; | |
783 | } | |
784 | ||
785 | while (size > 0) { | |
786 | l = IO_BUF_SIZE - f->buf_index; | |
787 | if (l > size) | |
788 | l = size; | |
789 | memcpy(f->buf + f->buf_index, buf, l); | |
790 | f->bytes_xfer += size; | |
791 | if (f->ops->writev_buffer) { | |
792 | add_to_iovec(f, f->buf + f->buf_index, l); | |
793 | } | |
794 | f->buf_index += l; | |
795 | if (f->buf_index == IO_BUF_SIZE) { | |
796 | qemu_fflush(f); | |
797 | } | |
798 | if (qemu_file_get_error(f)) { | |
799 | break; | |
800 | } | |
801 | buf += l; | |
802 | size -= l; | |
803 | } | |
804 | } | |
805 | ||
806 | void qemu_put_byte(QEMUFile *f, int v) | |
807 | { | |
808 | if (f->last_error) { | |
809 | return; | |
810 | } | |
811 | ||
812 | f->buf[f->buf_index] = v; | |
813 | f->bytes_xfer++; | |
814 | if (f->ops->writev_buffer) { | |
815 | add_to_iovec(f, f->buf + f->buf_index, 1); | |
816 | } | |
817 | f->buf_index++; | |
818 | if (f->buf_index == IO_BUF_SIZE) { | |
819 | qemu_fflush(f); | |
820 | } | |
821 | } | |
822 | ||
823 | static void qemu_file_skip(QEMUFile *f, int size) | |
824 | { | |
825 | if (f->buf_index + size <= f->buf_size) { | |
826 | f->buf_index += size; | |
827 | } | |
828 | } | |
829 | ||
830 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
831 | { | |
832 | int pending; | |
833 | int index; | |
834 | ||
835 | assert(!qemu_file_is_writable(f)); | |
836 | ||
837 | index = f->buf_index + offset; | |
838 | pending = f->buf_size - index; | |
839 | if (pending < size) { | |
840 | qemu_fill_buffer(f); | |
841 | index = f->buf_index + offset; | |
842 | pending = f->buf_size - index; | |
843 | } | |
844 | ||
845 | if (pending <= 0) { | |
846 | return 0; | |
847 | } | |
848 | if (size > pending) { | |
849 | size = pending; | |
850 | } | |
851 | ||
852 | memcpy(buf, f->buf + index, size); | |
853 | return size; | |
854 | } | |
855 | ||
856 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
857 | { | |
858 | int pending = size; | |
859 | int done = 0; | |
860 | ||
861 | while (pending > 0) { | |
862 | int res; | |
863 | ||
864 | res = qemu_peek_buffer(f, buf, pending, 0); | |
865 | if (res == 0) { | |
866 | return done; | |
867 | } | |
868 | qemu_file_skip(f, res); | |
869 | buf += res; | |
870 | pending -= res; | |
871 | done += res; | |
872 | } | |
873 | return done; | |
874 | } | |
875 | ||
876 | static int qemu_peek_byte(QEMUFile *f, int offset) | |
877 | { | |
878 | int index = f->buf_index + offset; | |
879 | ||
880 | assert(!qemu_file_is_writable(f)); | |
881 | ||
882 | if (index >= f->buf_size) { | |
883 | qemu_fill_buffer(f); | |
884 | index = f->buf_index + offset; | |
885 | if (index >= f->buf_size) { | |
886 | return 0; | |
887 | } | |
888 | } | |
889 | return f->buf[index]; | |
890 | } | |
891 | ||
892 | int qemu_get_byte(QEMUFile *f) | |
893 | { | |
894 | int result; | |
895 | ||
896 | result = qemu_peek_byte(f, 0); | |
897 | qemu_file_skip(f, 1); | |
898 | return result; | |
899 | } | |
900 | ||
901 | int64_t qemu_ftell(QEMUFile *f) | |
902 | { | |
903 | qemu_fflush(f); | |
904 | return f->pos; | |
905 | } | |
906 | ||
907 | int qemu_file_rate_limit(QEMUFile *f) | |
908 | { | |
909 | if (qemu_file_get_error(f)) { | |
910 | return 1; | |
911 | } | |
912 | if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { | |
913 | return 1; | |
914 | } | |
915 | return 0; | |
916 | } | |
917 | ||
918 | int64_t qemu_file_get_rate_limit(QEMUFile *f) | |
919 | { | |
920 | return f->xfer_limit; | |
921 | } | |
922 | ||
923 | void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) | |
924 | { | |
925 | f->xfer_limit = limit; | |
926 | } | |
927 | ||
928 | void qemu_file_reset_rate_limit(QEMUFile *f) | |
929 | { | |
930 | f->bytes_xfer = 0; | |
931 | } | |
932 | ||
933 | void qemu_put_be16(QEMUFile *f, unsigned int v) | |
934 | { | |
935 | qemu_put_byte(f, v >> 8); | |
936 | qemu_put_byte(f, v); | |
937 | } | |
938 | ||
939 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
940 | { | |
941 | qemu_put_byte(f, v >> 24); | |
942 | qemu_put_byte(f, v >> 16); | |
943 | qemu_put_byte(f, v >> 8); | |
944 | qemu_put_byte(f, v); | |
945 | } | |
946 | ||
947 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
948 | { | |
949 | qemu_put_be32(f, v >> 32); | |
950 | qemu_put_be32(f, v); | |
951 | } | |
952 | ||
953 | unsigned int qemu_get_be16(QEMUFile *f) | |
954 | { | |
955 | unsigned int v; | |
956 | v = qemu_get_byte(f) << 8; | |
957 | v |= qemu_get_byte(f); | |
958 | return v; | |
959 | } | |
960 | ||
961 | unsigned int qemu_get_be32(QEMUFile *f) | |
962 | { | |
963 | unsigned int v; | |
964 | v = qemu_get_byte(f) << 24; | |
965 | v |= qemu_get_byte(f) << 16; | |
966 | v |= qemu_get_byte(f) << 8; | |
967 | v |= qemu_get_byte(f); | |
968 | return v; | |
969 | } | |
970 | ||
971 | uint64_t qemu_get_be64(QEMUFile *f) | |
972 | { | |
973 | uint64_t v; | |
974 | v = (uint64_t)qemu_get_be32(f) << 32; | |
975 | v |= qemu_get_be32(f); | |
976 | return v; | |
977 | } | |
978 | ||
979 | ||
980 | /* timer */ | |
981 | ||
982 | void timer_put(QEMUFile *f, QEMUTimer *ts) | |
983 | { | |
984 | uint64_t expire_time; | |
985 | ||
986 | expire_time = timer_expire_time_ns(ts); | |
987 | qemu_put_be64(f, expire_time); | |
988 | } | |
989 | ||
990 | void timer_get(QEMUFile *f, QEMUTimer *ts) | |
991 | { | |
992 | uint64_t expire_time; | |
993 | ||
994 | expire_time = qemu_get_be64(f); | |
995 | if (expire_time != -1) { | |
996 | timer_mod_ns(ts, expire_time); | |
997 | } else { | |
998 | timer_del(ts); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | ||
1003 | /* bool */ | |
1004 | ||
1005 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
1006 | { | |
1007 | bool *v = pv; | |
1008 | *v = qemu_get_byte(f); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
1013 | { | |
1014 | bool *v = pv; | |
1015 | qemu_put_byte(f, *v); | |
1016 | } | |
1017 | ||
1018 | const VMStateInfo vmstate_info_bool = { | |
1019 | .name = "bool", | |
1020 | .get = get_bool, | |
1021 | .put = put_bool, | |
1022 | }; | |
1023 | ||
1024 | /* 8 bit int */ | |
1025 | ||
1026 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
1027 | { | |
1028 | int8_t *v = pv; | |
1029 | qemu_get_s8s(f, v); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static void put_int8(QEMUFile *f, void *pv, size_t size) | |
1034 | { | |
1035 | int8_t *v = pv; | |
1036 | qemu_put_s8s(f, v); | |
1037 | } | |
1038 | ||
1039 | const VMStateInfo vmstate_info_int8 = { | |
1040 | .name = "int8", | |
1041 | .get = get_int8, | |
1042 | .put = put_int8, | |
1043 | }; | |
1044 | ||
1045 | /* 16 bit int */ | |
1046 | ||
1047 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
1048 | { | |
1049 | int16_t *v = pv; | |
1050 | qemu_get_sbe16s(f, v); | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | static void put_int16(QEMUFile *f, void *pv, size_t size) | |
1055 | { | |
1056 | int16_t *v = pv; | |
1057 | qemu_put_sbe16s(f, v); | |
1058 | } | |
1059 | ||
1060 | const VMStateInfo vmstate_info_int16 = { | |
1061 | .name = "int16", | |
1062 | .get = get_int16, | |
1063 | .put = put_int16, | |
1064 | }; | |
1065 | ||
1066 | /* 32 bit int */ | |
1067 | ||
1068 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
1069 | { | |
1070 | int32_t *v = pv; | |
1071 | qemu_get_sbe32s(f, v); | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | static void put_int32(QEMUFile *f, void *pv, size_t size) | |
1076 | { | |
1077 | int32_t *v = pv; | |
1078 | qemu_put_sbe32s(f, v); | |
1079 | } | |
1080 | ||
1081 | const VMStateInfo vmstate_info_int32 = { | |
1082 | .name = "int32", | |
1083 | .get = get_int32, | |
1084 | .put = put_int32, | |
1085 | }; | |
1086 | ||
1087 | /* 32 bit int. See that the received value is the same than the one | |
1088 | in the field */ | |
1089 | ||
1090 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
1091 | { | |
1092 | int32_t *v = pv; | |
1093 | int32_t v2; | |
1094 | qemu_get_sbe32s(f, &v2); | |
1095 | ||
1096 | if (*v == v2) | |
1097 | return 0; | |
1098 | return -EINVAL; | |
1099 | } | |
1100 | ||
1101 | const VMStateInfo vmstate_info_int32_equal = { | |
1102 | .name = "int32 equal", | |
1103 | .get = get_int32_equal, | |
1104 | .put = put_int32, | |
1105 | }; | |
1106 | ||
1107 | /* 32 bit int. See that the received value is the less or the same | |
1108 | than the one in the field */ | |
1109 | ||
1110 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
1111 | { | |
1112 | int32_t *old = pv; | |
1113 | int32_t new; | |
1114 | qemu_get_sbe32s(f, &new); | |
1115 | ||
1116 | if (*old <= new) | |
1117 | return 0; | |
1118 | return -EINVAL; | |
1119 | } | |
1120 | ||
1121 | const VMStateInfo vmstate_info_int32_le = { | |
1122 | .name = "int32 equal", | |
1123 | .get = get_int32_le, | |
1124 | .put = put_int32, | |
1125 | }; | |
1126 | ||
1127 | /* 64 bit int */ | |
1128 | ||
1129 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
1130 | { | |
1131 | int64_t *v = pv; | |
1132 | qemu_get_sbe64s(f, v); | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | static void put_int64(QEMUFile *f, void *pv, size_t size) | |
1137 | { | |
1138 | int64_t *v = pv; | |
1139 | qemu_put_sbe64s(f, v); | |
1140 | } | |
1141 | ||
1142 | const VMStateInfo vmstate_info_int64 = { | |
1143 | .name = "int64", | |
1144 | .get = get_int64, | |
1145 | .put = put_int64, | |
1146 | }; | |
1147 | ||
1148 | /* 8 bit unsigned int */ | |
1149 | ||
1150 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
1151 | { | |
1152 | uint8_t *v = pv; | |
1153 | qemu_get_8s(f, v); | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static void put_uint8(QEMUFile *f, void *pv, size_t size) | |
1158 | { | |
1159 | uint8_t *v = pv; | |
1160 | qemu_put_8s(f, v); | |
1161 | } | |
1162 | ||
1163 | const VMStateInfo vmstate_info_uint8 = { | |
1164 | .name = "uint8", | |
1165 | .get = get_uint8, | |
1166 | .put = put_uint8, | |
1167 | }; | |
1168 | ||
1169 | /* 16 bit unsigned int */ | |
1170 | ||
1171 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
1172 | { | |
1173 | uint16_t *v = pv; | |
1174 | qemu_get_be16s(f, v); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | static void put_uint16(QEMUFile *f, void *pv, size_t size) | |
1179 | { | |
1180 | uint16_t *v = pv; | |
1181 | qemu_put_be16s(f, v); | |
1182 | } | |
1183 | ||
1184 | const VMStateInfo vmstate_info_uint16 = { | |
1185 | .name = "uint16", | |
1186 | .get = get_uint16, | |
1187 | .put = put_uint16, | |
1188 | }; | |
1189 | ||
1190 | /* 32 bit unsigned int */ | |
1191 | ||
1192 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
1193 | { | |
1194 | uint32_t *v = pv; | |
1195 | qemu_get_be32s(f, v); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | static void put_uint32(QEMUFile *f, void *pv, size_t size) | |
1200 | { | |
1201 | uint32_t *v = pv; | |
1202 | qemu_put_be32s(f, v); | |
1203 | } | |
1204 | ||
1205 | const VMStateInfo vmstate_info_uint32 = { | |
1206 | .name = "uint32", | |
1207 | .get = get_uint32, | |
1208 | .put = put_uint32, | |
1209 | }; | |
1210 | ||
1211 | /* 32 bit uint. See that the received value is the same than the one | |
1212 | in the field */ | |
1213 | ||
1214 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1215 | { | |
1216 | uint32_t *v = pv; | |
1217 | uint32_t v2; | |
1218 | qemu_get_be32s(f, &v2); | |
1219 | ||
1220 | if (*v == v2) { | |
1221 | return 0; | |
1222 | } | |
1223 | return -EINVAL; | |
1224 | } | |
1225 | ||
1226 | const VMStateInfo vmstate_info_uint32_equal = { | |
1227 | .name = "uint32 equal", | |
1228 | .get = get_uint32_equal, | |
1229 | .put = put_uint32, | |
1230 | }; | |
1231 | ||
1232 | /* 64 bit unsigned int */ | |
1233 | ||
1234 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1235 | { | |
1236 | uint64_t *v = pv; | |
1237 | qemu_get_be64s(f, v); | |
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | static void put_uint64(QEMUFile *f, void *pv, size_t size) | |
1242 | { | |
1243 | uint64_t *v = pv; | |
1244 | qemu_put_be64s(f, v); | |
1245 | } | |
1246 | ||
1247 | const VMStateInfo vmstate_info_uint64 = { | |
1248 | .name = "uint64", | |
1249 | .get = get_uint64, | |
1250 | .put = put_uint64, | |
1251 | }; | |
1252 | ||
1253 | /* 64 bit unsigned int. See that the received value is the same than the one | |
1254 | in the field */ | |
1255 | ||
1256 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) | |
1257 | { | |
1258 | uint64_t *v = pv; | |
1259 | uint64_t v2; | |
1260 | qemu_get_be64s(f, &v2); | |
1261 | ||
1262 | if (*v == v2) { | |
1263 | return 0; | |
1264 | } | |
1265 | return -EINVAL; | |
1266 | } | |
1267 | ||
1268 | const VMStateInfo vmstate_info_uint64_equal = { | |
1269 | .name = "int64 equal", | |
1270 | .get = get_uint64_equal, | |
1271 | .put = put_uint64, | |
1272 | }; | |
1273 | ||
1274 | /* 8 bit int. See that the received value is the same than the one | |
1275 | in the field */ | |
1276 | ||
1277 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1278 | { | |
1279 | uint8_t *v = pv; | |
1280 | uint8_t v2; | |
1281 | qemu_get_8s(f, &v2); | |
1282 | ||
1283 | if (*v == v2) | |
1284 | return 0; | |
1285 | return -EINVAL; | |
1286 | } | |
1287 | ||
1288 | const VMStateInfo vmstate_info_uint8_equal = { | |
1289 | .name = "uint8 equal", | |
1290 | .get = get_uint8_equal, | |
1291 | .put = put_uint8, | |
1292 | }; | |
1293 | ||
1294 | /* 16 bit unsigned int int. See that the received value is the same than the one | |
1295 | in the field */ | |
1296 | ||
1297 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1298 | { | |
1299 | uint16_t *v = pv; | |
1300 | uint16_t v2; | |
1301 | qemu_get_be16s(f, &v2); | |
1302 | ||
1303 | if (*v == v2) | |
1304 | return 0; | |
1305 | return -EINVAL; | |
1306 | } | |
1307 | ||
1308 | const VMStateInfo vmstate_info_uint16_equal = { | |
1309 | .name = "uint16 equal", | |
1310 | .get = get_uint16_equal, | |
1311 | .put = put_uint16, | |
1312 | }; | |
1313 | ||
1314 | /* floating point */ | |
1315 | ||
1316 | static int get_float64(QEMUFile *f, void *pv, size_t size) | |
1317 | { | |
1318 | float64 *v = pv; | |
1319 | ||
1320 | *v = make_float64(qemu_get_be64(f)); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static void put_float64(QEMUFile *f, void *pv, size_t size) | |
1325 | { | |
1326 | uint64_t *v = pv; | |
1327 | ||
1328 | qemu_put_be64(f, float64_val(*v)); | |
1329 | } | |
1330 | ||
1331 | const VMStateInfo vmstate_info_float64 = { | |
1332 | .name = "float64", | |
1333 | .get = get_float64, | |
1334 | .put = put_float64, | |
1335 | }; | |
1336 | ||
1337 | /* timers */ | |
1338 | ||
1339 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1340 | { | |
1341 | QEMUTimer *v = pv; | |
1342 | timer_get(f, v); | |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | static void put_timer(QEMUFile *f, void *pv, size_t size) | |
1347 | { | |
1348 | QEMUTimer *v = pv; | |
1349 | timer_put(f, v); | |
1350 | } | |
1351 | ||
1352 | const VMStateInfo vmstate_info_timer = { | |
1353 | .name = "timer", | |
1354 | .get = get_timer, | |
1355 | .put = put_timer, | |
1356 | }; | |
1357 | ||
1358 | /* uint8_t buffers */ | |
1359 | ||
1360 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1361 | { | |
1362 | uint8_t *v = pv; | |
1363 | qemu_get_buffer(f, v, size); | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | static void put_buffer(QEMUFile *f, void *pv, size_t size) | |
1368 | { | |
1369 | uint8_t *v = pv; | |
1370 | qemu_put_buffer(f, v, size); | |
1371 | } | |
1372 | ||
1373 | const VMStateInfo vmstate_info_buffer = { | |
1374 | .name = "buffer", | |
1375 | .get = get_buffer, | |
1376 | .put = put_buffer, | |
1377 | }; | |
1378 | ||
1379 | /* unused buffers: space that was used for some fields that are | |
1380 | not useful anymore */ | |
1381 | ||
1382 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1383 | { | |
1384 | uint8_t buf[1024]; | |
1385 | int block_len; | |
1386 | ||
1387 | while (size > 0) { | |
1388 | block_len = MIN(sizeof(buf), size); | |
1389 | size -= block_len; | |
1390 | qemu_get_buffer(f, buf, block_len); | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1396 | { | |
1397 | static const uint8_t buf[1024]; | |
1398 | int block_len; | |
1399 | ||
1400 | while (size > 0) { | |
1401 | block_len = MIN(sizeof(buf), size); | |
1402 | size -= block_len; | |
1403 | qemu_put_buffer(f, buf, block_len); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | const VMStateInfo vmstate_info_unused_buffer = { | |
1408 | .name = "unused_buffer", | |
1409 | .get = get_unused_buffer, | |
1410 | .put = put_unused_buffer, | |
1411 | }; | |
1412 | ||
1413 | /* bitmaps (as defined by bitmap.h). Note that size here is the size | |
1414 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1415 | * bit words with the bits in big endian order. The in-memory format | |
1416 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1417 | */ | |
1418 | /* This is the number of 64 bit words sent over the wire */ | |
1419 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1420 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1421 | { | |
1422 | unsigned long *bmp = pv; | |
1423 | int i, idx = 0; | |
1424 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1425 | uint64_t w = qemu_get_be64(f); | |
1426 | bmp[idx++] = w; | |
1427 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1428 | bmp[idx++] = w >> 32; | |
1429 | } | |
1430 | } | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1435 | { | |
1436 | unsigned long *bmp = pv; | |
1437 | int i, idx = 0; | |
1438 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1439 | uint64_t w = bmp[idx++]; | |
1440 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1441 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1442 | } | |
1443 | qemu_put_be64(f, w); | |
1444 | } | |
1445 | } | |
1446 | ||
1447 | const VMStateInfo vmstate_info_bitmap = { | |
1448 | .name = "bitmap", | |
1449 | .get = get_bitmap, | |
1450 | .put = put_bitmap, | |
1451 | }; | |
1452 | ||
1453 | typedef struct CompatEntry { | |
1454 | char idstr[256]; | |
1455 | int instance_id; | |
1456 | } CompatEntry; | |
1457 | ||
1458 | typedef struct SaveStateEntry { | |
1459 | QTAILQ_ENTRY(SaveStateEntry) entry; | |
1460 | char idstr[256]; | |
1461 | int instance_id; | |
1462 | int alias_id; | |
1463 | int version_id; | |
1464 | int section_id; | |
1465 | SaveVMHandlers *ops; | |
1466 | const VMStateDescription *vmsd; | |
1467 | void *opaque; | |
1468 | CompatEntry *compat; | |
1469 | int no_migrate; | |
1470 | int is_ram; | |
1471 | } SaveStateEntry; | |
1472 | ||
1473 | ||
1474 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = | |
1475 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
1476 | static int global_section_id; | |
1477 | ||
1478 | static int calculate_new_instance_id(const char *idstr) | |
1479 | { | |
1480 | SaveStateEntry *se; | |
1481 | int instance_id = 0; | |
1482 | ||
1483 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1484 | if (strcmp(idstr, se->idstr) == 0 | |
1485 | && instance_id <= se->instance_id) { | |
1486 | instance_id = se->instance_id + 1; | |
1487 | } | |
1488 | } | |
1489 | return instance_id; | |
1490 | } | |
1491 | ||
1492 | static int calculate_compat_instance_id(const char *idstr) | |
1493 | { | |
1494 | SaveStateEntry *se; | |
1495 | int instance_id = 0; | |
1496 | ||
1497 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1498 | if (!se->compat) | |
1499 | continue; | |
1500 | ||
1501 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1502 | && instance_id <= se->compat->instance_id) { | |
1503 | instance_id = se->compat->instance_id + 1; | |
1504 | } | |
1505 | } | |
1506 | return instance_id; | |
1507 | } | |
1508 | ||
1509 | /* TODO: Individual devices generally have very little idea about the rest | |
1510 | of the system, so instance_id should be removed/replaced. | |
1511 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1512 | distinguishing id for all instances of your device class. */ | |
1513 | int register_savevm_live(DeviceState *dev, | |
1514 | const char *idstr, | |
1515 | int instance_id, | |
1516 | int version_id, | |
1517 | SaveVMHandlers *ops, | |
1518 | void *opaque) | |
1519 | { | |
1520 | SaveStateEntry *se; | |
1521 | ||
1522 | se = g_malloc0(sizeof(SaveStateEntry)); | |
1523 | se->version_id = version_id; | |
1524 | se->section_id = global_section_id++; | |
1525 | se->ops = ops; | |
1526 | se->opaque = opaque; | |
1527 | se->vmsd = NULL; | |
1528 | se->no_migrate = 0; | |
1529 | /* if this is a live_savem then set is_ram */ | |
1530 | if (ops->save_live_setup != NULL) { | |
1531 | se->is_ram = 1; | |
1532 | } | |
1533 | ||
1534 | if (dev) { | |
1535 | char *id = qdev_get_dev_path(dev); | |
1536 | if (id) { | |
1537 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1538 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
1539 | g_free(id); | |
1540 | ||
1541 | se->compat = g_malloc0(sizeof(CompatEntry)); | |
1542 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); | |
1543 | se->compat->instance_id = instance_id == -1 ? | |
1544 | calculate_compat_instance_id(idstr) : instance_id; | |
1545 | instance_id = -1; | |
1546 | } | |
1547 | } | |
1548 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1549 | ||
1550 | if (instance_id == -1) { | |
1551 | se->instance_id = calculate_new_instance_id(se->idstr); | |
1552 | } else { | |
1553 | se->instance_id = instance_id; | |
1554 | } | |
1555 | assert(!se->compat || se->instance_id == 0); | |
1556 | /* add at the end of list */ | |
1557 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | int register_savevm(DeviceState *dev, | |
1562 | const char *idstr, | |
1563 | int instance_id, | |
1564 | int version_id, | |
1565 | SaveStateHandler *save_state, | |
1566 | LoadStateHandler *load_state, | |
1567 | void *opaque) | |
1568 | { | |
1569 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); | |
1570 | ops->save_state = save_state; | |
1571 | ops->load_state = load_state; | |
1572 | return register_savevm_live(dev, idstr, instance_id, version_id, | |
1573 | ops, opaque); | |
1574 | } | |
1575 | ||
1576 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) | |
1577 | { | |
1578 | SaveStateEntry *se, *new_se; | |
1579 | char id[256] = ""; | |
1580 | ||
1581 | if (dev) { | |
1582 | char *path = qdev_get_dev_path(dev); | |
1583 | if (path) { | |
1584 | pstrcpy(id, sizeof(id), path); | |
1585 | pstrcat(id, sizeof(id), "/"); | |
1586 | g_free(path); | |
1587 | } | |
1588 | } | |
1589 | pstrcat(id, sizeof(id), idstr); | |
1590 | ||
1591 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { | |
1592 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { | |
1593 | QTAILQ_REMOVE(&savevm_handlers, se, entry); | |
1594 | if (se->compat) { | |
1595 | g_free(se->compat); | |
1596 | } | |
1597 | g_free(se->ops); | |
1598 | g_free(se); | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, | |
1604 | const VMStateDescription *vmsd, | |
1605 | void *opaque, int alias_id, | |
1606 | int required_for_version) | |
1607 | { | |
1608 | SaveStateEntry *se; | |
1609 | ||
1610 | /* If this triggers, alias support can be dropped for the vmsd. */ | |
1611 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1612 | ||
1613 | se = g_malloc0(sizeof(SaveStateEntry)); | |
1614 | se->version_id = vmsd->version_id; | |
1615 | se->section_id = global_section_id++; | |
1616 | se->opaque = opaque; | |
1617 | se->vmsd = vmsd; | |
1618 | se->alias_id = alias_id; | |
1619 | se->no_migrate = vmsd->unmigratable; | |
1620 | ||
1621 | if (dev) { | |
1622 | char *id = qdev_get_dev_path(dev); | |
1623 | if (id) { | |
1624 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1625 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
1626 | g_free(id); | |
1627 | ||
1628 | se->compat = g_malloc0(sizeof(CompatEntry)); | |
1629 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); | |
1630 | se->compat->instance_id = instance_id == -1 ? | |
1631 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1632 | instance_id = -1; | |
1633 | } | |
1634 | } | |
1635 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1636 | ||
1637 | if (instance_id == -1) { | |
1638 | se->instance_id = calculate_new_instance_id(se->idstr); | |
1639 | } else { | |
1640 | se->instance_id = instance_id; | |
1641 | } | |
1642 | assert(!se->compat || se->instance_id == 0); | |
1643 | /* add at the end of list */ | |
1644 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); | |
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, | |
1649 | void *opaque) | |
1650 | { | |
1651 | SaveStateEntry *se, *new_se; | |
1652 | ||
1653 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { | |
1654 | if (se->vmsd == vmsd && se->opaque == opaque) { | |
1655 | QTAILQ_REMOVE(&savevm_handlers, se, entry); | |
1656 | if (se->compat) { | |
1657 | g_free(se->compat); | |
1658 | } | |
1659 | g_free(se); | |
1660 | } | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1665 | void *opaque); | |
1666 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1667 | void *opaque); | |
1668 | ||
1669 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, | |
1670 | void *opaque, int version_id) | |
1671 | { | |
1672 | VMStateField *field = vmsd->fields; | |
1673 | int ret; | |
1674 | ||
1675 | if (version_id > vmsd->version_id) { | |
1676 | return -EINVAL; | |
1677 | } | |
1678 | if (version_id < vmsd->minimum_version_id_old) { | |
1679 | return -EINVAL; | |
1680 | } | |
1681 | if (version_id < vmsd->minimum_version_id) { | |
1682 | return vmsd->load_state_old(f, opaque, version_id); | |
1683 | } | |
1684 | if (vmsd->pre_load) { | |
1685 | int ret = vmsd->pre_load(opaque); | |
1686 | if (ret) | |
1687 | return ret; | |
1688 | } | |
1689 | while(field->name) { | |
1690 | if ((field->field_exists && | |
1691 | field->field_exists(opaque, version_id)) || | |
1692 | (!field->field_exists && | |
1693 | field->version_id <= version_id)) { | |
1694 | void *base_addr = opaque + field->offset; | |
1695 | int i, n_elems = 1; | |
1696 | int size = field->size; | |
1697 | ||
1698 | if (field->flags & VMS_VBUFFER) { | |
1699 | size = *(int32_t *)(opaque+field->size_offset); | |
1700 | if (field->flags & VMS_MULTIPLY) { | |
1701 | size *= field->size; | |
1702 | } | |
1703 | } | |
1704 | if (field->flags & VMS_ARRAY) { | |
1705 | n_elems = field->num; | |
1706 | } else if (field->flags & VMS_VARRAY_INT32) { | |
1707 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1708 | } else if (field->flags & VMS_VARRAY_UINT32) { | |
1709 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
1710 | } else if (field->flags & VMS_VARRAY_UINT16) { | |
1711 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
1712 | } else if (field->flags & VMS_VARRAY_UINT8) { | |
1713 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
1714 | } | |
1715 | if (field->flags & VMS_POINTER) { | |
1716 | base_addr = *(void **)base_addr + field->start; | |
1717 | } | |
1718 | for (i = 0; i < n_elems; i++) { | |
1719 | void *addr = base_addr + size * i; | |
1720 | ||
1721 | if (field->flags & VMS_ARRAY_OF_POINTER) { | |
1722 | addr = *(void **)addr; | |
1723 | } | |
1724 | if (field->flags & VMS_STRUCT) { | |
1725 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); | |
1726 | } else { | |
1727 | ret = field->info->get(f, addr, size); | |
1728 | ||
1729 | } | |
1730 | if (ret < 0) { | |
1731 | return ret; | |
1732 | } | |
1733 | } | |
1734 | } | |
1735 | field++; | |
1736 | } | |
1737 | ret = vmstate_subsection_load(f, vmsd, opaque); | |
1738 | if (ret != 0) { | |
1739 | return ret; | |
1740 | } | |
1741 | if (vmsd->post_load) { | |
1742 | return vmsd->post_load(opaque, version_id); | |
1743 | } | |
1744 | return 0; | |
1745 | } | |
1746 | ||
1747 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
1748 | void *opaque) | |
1749 | { | |
1750 | VMStateField *field = vmsd->fields; | |
1751 | ||
1752 | if (vmsd->pre_save) { | |
1753 | vmsd->pre_save(opaque); | |
1754 | } | |
1755 | while(field->name) { | |
1756 | if (!field->field_exists || | |
1757 | field->field_exists(opaque, vmsd->version_id)) { | |
1758 | void *base_addr = opaque + field->offset; | |
1759 | int i, n_elems = 1; | |
1760 | int size = field->size; | |
1761 | ||
1762 | if (field->flags & VMS_VBUFFER) { | |
1763 | size = *(int32_t *)(opaque+field->size_offset); | |
1764 | if (field->flags & VMS_MULTIPLY) { | |
1765 | size *= field->size; | |
1766 | } | |
1767 | } | |
1768 | if (field->flags & VMS_ARRAY) { | |
1769 | n_elems = field->num; | |
1770 | } else if (field->flags & VMS_VARRAY_INT32) { | |
1771 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1772 | } else if (field->flags & VMS_VARRAY_UINT32) { | |
1773 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
1774 | } else if (field->flags & VMS_VARRAY_UINT16) { | |
1775 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
1776 | } else if (field->flags & VMS_VARRAY_UINT8) { | |
1777 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
1778 | } | |
1779 | if (field->flags & VMS_POINTER) { | |
1780 | base_addr = *(void **)base_addr + field->start; | |
1781 | } | |
1782 | for (i = 0; i < n_elems; i++) { | |
1783 | void *addr = base_addr + size * i; | |
1784 | ||
1785 | if (field->flags & VMS_ARRAY_OF_POINTER) { | |
1786 | addr = *(void **)addr; | |
1787 | } | |
1788 | if (field->flags & VMS_STRUCT) { | |
1789 | vmstate_save_state(f, field->vmsd, addr); | |
1790 | } else { | |
1791 | field->info->put(f, addr, size); | |
1792 | } | |
1793 | } | |
1794 | } | |
1795 | field++; | |
1796 | } | |
1797 | vmstate_subsection_save(f, vmsd, opaque); | |
1798 | } | |
1799 | ||
1800 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) | |
1801 | { | |
1802 | if (!se->vmsd) { /* Old style */ | |
1803 | return se->ops->load_state(f, se->opaque, version_id); | |
1804 | } | |
1805 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
1806 | } | |
1807 | ||
1808 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) | |
1809 | { | |
1810 | if (!se->vmsd) { /* Old style */ | |
1811 | se->ops->save_state(f, se->opaque); | |
1812 | return; | |
1813 | } | |
1814 | vmstate_save_state(f,se->vmsd, se->opaque); | |
1815 | } | |
1816 | ||
1817 | #define QEMU_VM_FILE_MAGIC 0x5145564d | |
1818 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1819 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1820 | ||
1821 | #define QEMU_VM_EOF 0x00 | |
1822 | #define QEMU_VM_SECTION_START 0x01 | |
1823 | #define QEMU_VM_SECTION_PART 0x02 | |
1824 | #define QEMU_VM_SECTION_END 0x03 | |
1825 | #define QEMU_VM_SECTION_FULL 0x04 | |
1826 | #define QEMU_VM_SUBSECTION 0x05 | |
1827 | ||
1828 | bool qemu_savevm_state_blocked(Error **errp) | |
1829 | { | |
1830 | SaveStateEntry *se; | |
1831 | ||
1832 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1833 | if (se->no_migrate) { | |
1834 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); | |
1835 | return true; | |
1836 | } | |
1837 | } | |
1838 | return false; | |
1839 | } | |
1840 | ||
1841 | void qemu_savevm_state_begin(QEMUFile *f, | |
1842 | const MigrationParams *params) | |
1843 | { | |
1844 | SaveStateEntry *se; | |
1845 | int ret; | |
1846 | ||
1847 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1848 | if (!se->ops || !se->ops->set_params) { | |
1849 | continue; | |
1850 | } | |
1851 | se->ops->set_params(params, se->opaque); | |
1852 | } | |
1853 | ||
1854 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1855 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1856 | ||
1857 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1858 | int len; | |
1859 | ||
1860 | if (!se->ops || !se->ops->save_live_setup) { | |
1861 | continue; | |
1862 | } | |
1863 | if (se->ops && se->ops->is_active) { | |
1864 | if (!se->ops->is_active(se->opaque)) { | |
1865 | continue; | |
1866 | } | |
1867 | } | |
1868 | /* Section type */ | |
1869 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1870 | qemu_put_be32(f, se->section_id); | |
1871 | ||
1872 | /* ID string */ | |
1873 | len = strlen(se->idstr); | |
1874 | qemu_put_byte(f, len); | |
1875 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1876 | ||
1877 | qemu_put_be32(f, se->instance_id); | |
1878 | qemu_put_be32(f, se->version_id); | |
1879 | ||
1880 | ret = se->ops->save_live_setup(f, se->opaque); | |
1881 | if (ret < 0) { | |
1882 | qemu_file_set_error(f, ret); | |
1883 | break; | |
1884 | } | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | /* | |
1889 | * this function has three return values: | |
1890 | * negative: there was one error, and we have -errno. | |
1891 | * 0 : We haven't finished, caller have to go again | |
1892 | * 1 : We have finished, we can go to complete phase | |
1893 | */ | |
1894 | int qemu_savevm_state_iterate(QEMUFile *f) | |
1895 | { | |
1896 | SaveStateEntry *se; | |
1897 | int ret = 1; | |
1898 | ||
1899 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1900 | if (!se->ops || !se->ops->save_live_iterate) { | |
1901 | continue; | |
1902 | } | |
1903 | if (se->ops && se->ops->is_active) { | |
1904 | if (!se->ops->is_active(se->opaque)) { | |
1905 | continue; | |
1906 | } | |
1907 | } | |
1908 | if (qemu_file_rate_limit(f)) { | |
1909 | return 0; | |
1910 | } | |
1911 | trace_savevm_section_start(); | |
1912 | /* Section type */ | |
1913 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1914 | qemu_put_be32(f, se->section_id); | |
1915 | ||
1916 | ret = se->ops->save_live_iterate(f, se->opaque); | |
1917 | trace_savevm_section_end(se->section_id); | |
1918 | ||
1919 | if (ret < 0) { | |
1920 | qemu_file_set_error(f, ret); | |
1921 | } | |
1922 | if (ret <= 0) { | |
1923 | /* Do not proceed to the next vmstate before this one reported | |
1924 | completion of the current stage. This serializes the migration | |
1925 | and reduces the probability that a faster changing state is | |
1926 | synchronized over and over again. */ | |
1927 | break; | |
1928 | } | |
1929 | } | |
1930 | return ret; | |
1931 | } | |
1932 | ||
1933 | void qemu_savevm_state_complete(QEMUFile *f) | |
1934 | { | |
1935 | SaveStateEntry *se; | |
1936 | int ret; | |
1937 | ||
1938 | cpu_synchronize_all_states(); | |
1939 | ||
1940 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1941 | if (!se->ops || !se->ops->save_live_complete) { | |
1942 | continue; | |
1943 | } | |
1944 | if (se->ops && se->ops->is_active) { | |
1945 | if (!se->ops->is_active(se->opaque)) { | |
1946 | continue; | |
1947 | } | |
1948 | } | |
1949 | trace_savevm_section_start(); | |
1950 | /* Section type */ | |
1951 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1952 | qemu_put_be32(f, se->section_id); | |
1953 | ||
1954 | ret = se->ops->save_live_complete(f, se->opaque); | |
1955 | trace_savevm_section_end(se->section_id); | |
1956 | if (ret < 0) { | |
1957 | qemu_file_set_error(f, ret); | |
1958 | return; | |
1959 | } | |
1960 | } | |
1961 | ||
1962 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1963 | int len; | |
1964 | ||
1965 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { | |
1966 | continue; | |
1967 | } | |
1968 | trace_savevm_section_start(); | |
1969 | /* Section type */ | |
1970 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1971 | qemu_put_be32(f, se->section_id); | |
1972 | ||
1973 | /* ID string */ | |
1974 | len = strlen(se->idstr); | |
1975 | qemu_put_byte(f, len); | |
1976 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1977 | ||
1978 | qemu_put_be32(f, se->instance_id); | |
1979 | qemu_put_be32(f, se->version_id); | |
1980 | ||
1981 | vmstate_save(f, se); | |
1982 | trace_savevm_section_end(se->section_id); | |
1983 | } | |
1984 | ||
1985 | qemu_put_byte(f, QEMU_VM_EOF); | |
1986 | qemu_fflush(f); | |
1987 | } | |
1988 | ||
1989 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) | |
1990 | { | |
1991 | SaveStateEntry *se; | |
1992 | uint64_t ret = 0; | |
1993 | ||
1994 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1995 | if (!se->ops || !se->ops->save_live_pending) { | |
1996 | continue; | |
1997 | } | |
1998 | if (se->ops && se->ops->is_active) { | |
1999 | if (!se->ops->is_active(se->opaque)) { | |
2000 | continue; | |
2001 | } | |
2002 | } | |
2003 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
2004 | } | |
2005 | return ret; | |
2006 | } | |
2007 | ||
2008 | void qemu_savevm_state_cancel(void) | |
2009 | { | |
2010 | SaveStateEntry *se; | |
2011 | ||
2012 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
2013 | if (se->ops && se->ops->cancel) { | |
2014 | se->ops->cancel(se->opaque); | |
2015 | } | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | static int qemu_savevm_state(QEMUFile *f) | |
2020 | { | |
2021 | int ret; | |
2022 | MigrationParams params = { | |
2023 | .blk = 0, | |
2024 | .shared = 0 | |
2025 | }; | |
2026 | ||
2027 | if (qemu_savevm_state_blocked(NULL)) { | |
2028 | return -EINVAL; | |
2029 | } | |
2030 | ||
2031 | qemu_mutex_unlock_iothread(); | |
2032 | qemu_savevm_state_begin(f, ¶ms); | |
2033 | qemu_mutex_lock_iothread(); | |
2034 | ||
2035 | while (qemu_file_get_error(f) == 0) { | |
2036 | if (qemu_savevm_state_iterate(f) > 0) { | |
2037 | break; | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | ret = qemu_file_get_error(f); | |
2042 | if (ret == 0) { | |
2043 | qemu_savevm_state_complete(f); | |
2044 | ret = qemu_file_get_error(f); | |
2045 | } | |
2046 | if (ret != 0) { | |
2047 | qemu_savevm_state_cancel(); | |
2048 | } | |
2049 | return ret; | |
2050 | } | |
2051 | ||
2052 | static int qemu_save_device_state(QEMUFile *f) | |
2053 | { | |
2054 | SaveStateEntry *se; | |
2055 | ||
2056 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
2057 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
2058 | ||
2059 | cpu_synchronize_all_states(); | |
2060 | ||
2061 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
2062 | int len; | |
2063 | ||
2064 | if (se->is_ram) { | |
2065 | continue; | |
2066 | } | |
2067 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { | |
2068 | continue; | |
2069 | } | |
2070 | ||
2071 | /* Section type */ | |
2072 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
2073 | qemu_put_be32(f, se->section_id); | |
2074 | ||
2075 | /* ID string */ | |
2076 | len = strlen(se->idstr); | |
2077 | qemu_put_byte(f, len); | |
2078 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
2079 | ||
2080 | qemu_put_be32(f, se->instance_id); | |
2081 | qemu_put_be32(f, se->version_id); | |
2082 | ||
2083 | vmstate_save(f, se); | |
2084 | } | |
2085 | ||
2086 | qemu_put_byte(f, QEMU_VM_EOF); | |
2087 | ||
2088 | return qemu_file_get_error(f); | |
2089 | } | |
2090 | ||
2091 | static SaveStateEntry *find_se(const char *idstr, int instance_id) | |
2092 | { | |
2093 | SaveStateEntry *se; | |
2094 | ||
2095 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
2096 | if (!strcmp(se->idstr, idstr) && | |
2097 | (instance_id == se->instance_id || | |
2098 | instance_id == se->alias_id)) | |
2099 | return se; | |
2100 | /* Migrating from an older version? */ | |
2101 | if (strstr(se->idstr, idstr) && se->compat) { | |
2102 | if (!strcmp(se->compat->idstr, idstr) && | |
2103 | (instance_id == se->compat->instance_id || | |
2104 | instance_id == se->alias_id)) | |
2105 | return se; | |
2106 | } | |
2107 | } | |
2108 | return NULL; | |
2109 | } | |
2110 | ||
2111 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) | |
2112 | { | |
2113 | while(sub && sub->needed) { | |
2114 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
2115 | return sub->vmsd; | |
2116 | } | |
2117 | sub++; | |
2118 | } | |
2119 | return NULL; | |
2120 | } | |
2121 | ||
2122 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
2123 | void *opaque) | |
2124 | { | |
2125 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { | |
2126 | char idstr[256]; | |
2127 | int ret; | |
2128 | uint8_t version_id, len, size; | |
2129 | const VMStateDescription *sub_vmsd; | |
2130 | ||
2131 | len = qemu_peek_byte(f, 1); | |
2132 | if (len < strlen(vmsd->name) + 1) { | |
2133 | /* subsection name has be be "section_name/a" */ | |
2134 | return 0; | |
2135 | } | |
2136 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
2137 | if (size != len) { | |
2138 | return 0; | |
2139 | } | |
2140 | idstr[size] = 0; | |
2141 | ||
2142 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { | |
2143 | /* it don't have a valid subsection name */ | |
2144 | return 0; | |
2145 | } | |
2146 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); | |
2147 | if (sub_vmsd == NULL) { | |
2148 | return -ENOENT; | |
2149 | } | |
2150 | qemu_file_skip(f, 1); /* subsection */ | |
2151 | qemu_file_skip(f, 1); /* len */ | |
2152 | qemu_file_skip(f, len); /* idstr */ | |
2153 | version_id = qemu_get_be32(f); | |
2154 | ||
2155 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); | |
2156 | if (ret) { | |
2157 | return ret; | |
2158 | } | |
2159 | } | |
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
2164 | void *opaque) | |
2165 | { | |
2166 | const VMStateSubsection *sub = vmsd->subsections; | |
2167 | ||
2168 | while (sub && sub->needed) { | |
2169 | if (sub->needed(opaque)) { | |
2170 | const VMStateDescription *vmsd = sub->vmsd; | |
2171 | uint8_t len; | |
2172 | ||
2173 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
2174 | len = strlen(vmsd->name); | |
2175 | qemu_put_byte(f, len); | |
2176 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
2177 | qemu_put_be32(f, vmsd->version_id); | |
2178 | vmstate_save_state(f, vmsd, opaque); | |
2179 | } | |
2180 | sub++; | |
2181 | } | |
2182 | } | |
2183 | ||
2184 | typedef struct LoadStateEntry { | |
2185 | QLIST_ENTRY(LoadStateEntry) entry; | |
2186 | SaveStateEntry *se; | |
2187 | int section_id; | |
2188 | int version_id; | |
2189 | } LoadStateEntry; | |
2190 | ||
2191 | int qemu_loadvm_state(QEMUFile *f) | |
2192 | { | |
2193 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = | |
2194 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
2195 | LoadStateEntry *le, *new_le; | |
2196 | uint8_t section_type; | |
2197 | unsigned int v; | |
2198 | int ret; | |
2199 | ||
2200 | if (qemu_savevm_state_blocked(NULL)) { | |
2201 | return -EINVAL; | |
2202 | } | |
2203 | ||
2204 | v = qemu_get_be32(f); | |
2205 | if (v != QEMU_VM_FILE_MAGIC) | |
2206 | return -EINVAL; | |
2207 | ||
2208 | v = qemu_get_be32(f); | |
2209 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { | |
2210 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
2211 | return -ENOTSUP; | |
2212 | } | |
2213 | if (v != QEMU_VM_FILE_VERSION) | |
2214 | return -ENOTSUP; | |
2215 | ||
2216 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
2217 | uint32_t instance_id, version_id, section_id; | |
2218 | SaveStateEntry *se; | |
2219 | char idstr[257]; | |
2220 | int len; | |
2221 | ||
2222 | switch (section_type) { | |
2223 | case QEMU_VM_SECTION_START: | |
2224 | case QEMU_VM_SECTION_FULL: | |
2225 | /* Read section start */ | |
2226 | section_id = qemu_get_be32(f); | |
2227 | len = qemu_get_byte(f); | |
2228 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
2229 | idstr[len] = 0; | |
2230 | instance_id = qemu_get_be32(f); | |
2231 | version_id = qemu_get_be32(f); | |
2232 | ||
2233 | /* Find savevm section */ | |
2234 | se = find_se(idstr, instance_id); | |
2235 | if (se == NULL) { | |
2236 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
2237 | ret = -EINVAL; | |
2238 | goto out; | |
2239 | } | |
2240 | ||
2241 | /* Validate version */ | |
2242 | if (version_id > se->version_id) { | |
2243 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
2244 | version_id, idstr, se->version_id); | |
2245 | ret = -EINVAL; | |
2246 | goto out; | |
2247 | } | |
2248 | ||
2249 | /* Add entry */ | |
2250 | le = g_malloc0(sizeof(*le)); | |
2251 | ||
2252 | le->se = se; | |
2253 | le->section_id = section_id; | |
2254 | le->version_id = version_id; | |
2255 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); | |
2256 | ||
2257 | ret = vmstate_load(f, le->se, le->version_id); | |
2258 | if (ret < 0) { | |
2259 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2260 | instance_id, idstr); | |
2261 | goto out; | |
2262 | } | |
2263 | break; | |
2264 | case QEMU_VM_SECTION_PART: | |
2265 | case QEMU_VM_SECTION_END: | |
2266 | section_id = qemu_get_be32(f); | |
2267 | ||
2268 | QLIST_FOREACH(le, &loadvm_handlers, entry) { | |
2269 | if (le->section_id == section_id) { | |
2270 | break; | |
2271 | } | |
2272 | } | |
2273 | if (le == NULL) { | |
2274 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2275 | ret = -EINVAL; | |
2276 | goto out; | |
2277 | } | |
2278 | ||
2279 | ret = vmstate_load(f, le->se, le->version_id); | |
2280 | if (ret < 0) { | |
2281 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2282 | section_id); | |
2283 | goto out; | |
2284 | } | |
2285 | break; | |
2286 | default: | |
2287 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2288 | ret = -EINVAL; | |
2289 | goto out; | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | cpu_synchronize_all_post_init(); | |
2294 | ||
2295 | ret = 0; | |
2296 | ||
2297 | out: | |
2298 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { | |
2299 | QLIST_REMOVE(le, entry); | |
2300 | g_free(le); | |
2301 | } | |
2302 | ||
2303 | if (ret == 0) { | |
2304 | ret = qemu_file_get_error(f); | |
2305 | } | |
2306 | ||
2307 | return ret; | |
2308 | } | |
2309 | ||
2310 | static BlockDriverState *find_vmstate_bs(void) | |
2311 | { | |
2312 | BlockDriverState *bs = NULL; | |
2313 | while ((bs = bdrv_next(bs))) { | |
2314 | if (bdrv_can_snapshot(bs)) { | |
2315 | return bs; | |
2316 | } | |
2317 | } | |
2318 | return NULL; | |
2319 | } | |
2320 | ||
2321 | /* | |
2322 | * Deletes snapshots of a given name in all opened images. | |
2323 | */ | |
2324 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2325 | { | |
2326 | BlockDriverState *bs; | |
2327 | QEMUSnapshotInfo sn1, *snapshot = &sn1; | |
2328 | Error *err = NULL; | |
2329 | ||
2330 | bs = NULL; | |
2331 | while ((bs = bdrv_next(bs))) { | |
2332 | if (bdrv_can_snapshot(bs) && | |
2333 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2334 | { | |
2335 | bdrv_snapshot_delete_by_id_or_name(bs, name, &err); | |
2336 | if (error_is_set(&err)) { | |
2337 | monitor_printf(mon, | |
2338 | "Error while deleting snapshot on device '%s':" | |
2339 | " %s\n", | |
2340 | bdrv_get_device_name(bs), | |
2341 | error_get_pretty(err)); | |
2342 | error_free(err); | |
2343 | return -1; | |
2344 | } | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | void do_savevm(Monitor *mon, const QDict *qdict) | |
2352 | { | |
2353 | BlockDriverState *bs, *bs1; | |
2354 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
2355 | int ret; | |
2356 | QEMUFile *f; | |
2357 | int saved_vm_running; | |
2358 | uint64_t vm_state_size; | |
2359 | qemu_timeval tv; | |
2360 | struct tm tm; | |
2361 | const char *name = qdict_get_try_str(qdict, "name"); | |
2362 | ||
2363 | /* Verify if there is a device that doesn't support snapshots and is writable */ | |
2364 | bs = NULL; | |
2365 | while ((bs = bdrv_next(bs))) { | |
2366 | ||
2367 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { | |
2368 | continue; | |
2369 | } | |
2370 | ||
2371 | if (!bdrv_can_snapshot(bs)) { | |
2372 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2373 | bdrv_get_device_name(bs)); | |
2374 | return; | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | bs = find_vmstate_bs(); | |
2379 | if (!bs) { | |
2380 | monitor_printf(mon, "No block device can accept snapshots\n"); | |
2381 | return; | |
2382 | } | |
2383 | ||
2384 | saved_vm_running = runstate_is_running(); | |
2385 | vm_stop(RUN_STATE_SAVE_VM); | |
2386 | ||
2387 | memset(sn, 0, sizeof(*sn)); | |
2388 | ||
2389 | /* fill auxiliary fields */ | |
2390 | qemu_gettimeofday(&tv); | |
2391 | sn->date_sec = tv.tv_sec; | |
2392 | sn->date_nsec = tv.tv_usec * 1000; | |
2393 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
2394 | ||
2395 | if (name) { | |
2396 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2397 | if (ret >= 0) { | |
2398 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2399 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2400 | } else { | |
2401 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2402 | } | |
2403 | } else { | |
2404 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ | |
2405 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
2406 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); | |
2407 | } | |
2408 | ||
2409 | /* Delete old snapshots of the same name */ | |
2410 | if (name && del_existing_snapshots(mon, name) < 0) { | |
2411 | goto the_end; | |
2412 | } | |
2413 | ||
2414 | /* save the VM state */ | |
2415 | f = qemu_fopen_bdrv(bs, 1); | |
2416 | if (!f) { | |
2417 | monitor_printf(mon, "Could not open VM state file\n"); | |
2418 | goto the_end; | |
2419 | } | |
2420 | ret = qemu_savevm_state(f); | |
2421 | vm_state_size = qemu_ftell(f); | |
2422 | qemu_fclose(f); | |
2423 | if (ret < 0) { | |
2424 | monitor_printf(mon, "Error %d while writing VM\n", ret); | |
2425 | goto the_end; | |
2426 | } | |
2427 | ||
2428 | /* create the snapshots */ | |
2429 | ||
2430 | bs1 = NULL; | |
2431 | while ((bs1 = bdrv_next(bs1))) { | |
2432 | if (bdrv_can_snapshot(bs1)) { | |
2433 | /* Write VM state size only to the image that contains the state */ | |
2434 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
2435 | ret = bdrv_snapshot_create(bs1, sn); | |
2436 | if (ret < 0) { | |
2437 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", | |
2438 | bdrv_get_device_name(bs1)); | |
2439 | } | |
2440 | } | |
2441 | } | |
2442 | ||
2443 | the_end: | |
2444 | if (saved_vm_running) | |
2445 | vm_start(); | |
2446 | } | |
2447 | ||
2448 | void qmp_xen_save_devices_state(const char *filename, Error **errp) | |
2449 | { | |
2450 | QEMUFile *f; | |
2451 | int saved_vm_running; | |
2452 | int ret; | |
2453 | ||
2454 | saved_vm_running = runstate_is_running(); | |
2455 | vm_stop(RUN_STATE_SAVE_VM); | |
2456 | ||
2457 | f = qemu_fopen(filename, "wb"); | |
2458 | if (!f) { | |
2459 | error_setg_file_open(errp, errno, filename); | |
2460 | goto the_end; | |
2461 | } | |
2462 | ret = qemu_save_device_state(f); | |
2463 | qemu_fclose(f); | |
2464 | if (ret < 0) { | |
2465 | error_set(errp, QERR_IO_ERROR); | |
2466 | } | |
2467 | ||
2468 | the_end: | |
2469 | if (saved_vm_running) | |
2470 | vm_start(); | |
2471 | } | |
2472 | ||
2473 | int load_vmstate(const char *name) | |
2474 | { | |
2475 | BlockDriverState *bs, *bs_vm_state; | |
2476 | QEMUSnapshotInfo sn; | |
2477 | QEMUFile *f; | |
2478 | int ret; | |
2479 | ||
2480 | bs_vm_state = find_vmstate_bs(); | |
2481 | if (!bs_vm_state) { | |
2482 | error_report("No block device supports snapshots"); | |
2483 | return -ENOTSUP; | |
2484 | } | |
2485 | ||
2486 | /* Don't even try to load empty VM states */ | |
2487 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2488 | if (ret < 0) { | |
2489 | return ret; | |
2490 | } else if (sn.vm_state_size == 0) { | |
2491 | error_report("This is a disk-only snapshot. Revert to it offline " | |
2492 | "using qemu-img."); | |
2493 | return -EINVAL; | |
2494 | } | |
2495 | ||
2496 | /* Verify if there is any device that doesn't support snapshots and is | |
2497 | writable and check if the requested snapshot is available too. */ | |
2498 | bs = NULL; | |
2499 | while ((bs = bdrv_next(bs))) { | |
2500 | ||
2501 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { | |
2502 | continue; | |
2503 | } | |
2504 | ||
2505 | if (!bdrv_can_snapshot(bs)) { | |
2506 | error_report("Device '%s' is writable but does not support snapshots.", | |
2507 | bdrv_get_device_name(bs)); | |
2508 | return -ENOTSUP; | |
2509 | } | |
2510 | ||
2511 | ret = bdrv_snapshot_find(bs, &sn, name); | |
2512 | if (ret < 0) { | |
2513 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2514 | bdrv_get_device_name(bs), name); | |
2515 | return ret; | |
2516 | } | |
2517 | } | |
2518 | ||
2519 | /* Flush all IO requests so they don't interfere with the new state. */ | |
2520 | bdrv_drain_all(); | |
2521 | ||
2522 | bs = NULL; | |
2523 | while ((bs = bdrv_next(bs))) { | |
2524 | if (bdrv_can_snapshot(bs)) { | |
2525 | ret = bdrv_snapshot_goto(bs, name); | |
2526 | if (ret < 0) { | |
2527 | error_report("Error %d while activating snapshot '%s' on '%s'", | |
2528 | ret, name, bdrv_get_device_name(bs)); | |
2529 | return ret; | |
2530 | } | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | /* restore the VM state */ | |
2535 | f = qemu_fopen_bdrv(bs_vm_state, 0); | |
2536 | if (!f) { | |
2537 | error_report("Could not open VM state file"); | |
2538 | return -EINVAL; | |
2539 | } | |
2540 | ||
2541 | qemu_system_reset(VMRESET_SILENT); | |
2542 | ret = qemu_loadvm_state(f); | |
2543 | ||
2544 | qemu_fclose(f); | |
2545 | if (ret < 0) { | |
2546 | error_report("Error %d while loading VM state", ret); | |
2547 | return ret; | |
2548 | } | |
2549 | ||
2550 | return 0; | |
2551 | } | |
2552 | ||
2553 | void do_delvm(Monitor *mon, const QDict *qdict) | |
2554 | { | |
2555 | BlockDriverState *bs, *bs1; | |
2556 | Error *err = NULL; | |
2557 | const char *name = qdict_get_str(qdict, "name"); | |
2558 | ||
2559 | bs = find_vmstate_bs(); | |
2560 | if (!bs) { | |
2561 | monitor_printf(mon, "No block device supports snapshots\n"); | |
2562 | return; | |
2563 | } | |
2564 | ||
2565 | bs1 = NULL; | |
2566 | while ((bs1 = bdrv_next(bs1))) { | |
2567 | if (bdrv_can_snapshot(bs1)) { | |
2568 | bdrv_snapshot_delete_by_id_or_name(bs, name, &err); | |
2569 | if (error_is_set(&err)) { | |
2570 | monitor_printf(mon, | |
2571 | "Error while deleting snapshot on device '%s':" | |
2572 | " %s\n", | |
2573 | bdrv_get_device_name(bs), | |
2574 | error_get_pretty(err)); | |
2575 | error_free(err); | |
2576 | } | |
2577 | } | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | void do_info_snapshots(Monitor *mon, const QDict *qdict) | |
2582 | { | |
2583 | BlockDriverState *bs, *bs1; | |
2584 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; | |
2585 | int nb_sns, i, ret, available; | |
2586 | int total; | |
2587 | int *available_snapshots; | |
2588 | ||
2589 | bs = find_vmstate_bs(); | |
2590 | if (!bs) { | |
2591 | monitor_printf(mon, "No available block device supports snapshots\n"); | |
2592 | return; | |
2593 | } | |
2594 | ||
2595 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2596 | if (nb_sns < 0) { | |
2597 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); | |
2598 | return; | |
2599 | } | |
2600 | ||
2601 | if (nb_sns == 0) { | |
2602 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2603 | return; | |
2604 | } | |
2605 | ||
2606 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); | |
2607 | total = 0; | |
2608 | for (i = 0; i < nb_sns; i++) { | |
2609 | sn = &sn_tab[i]; | |
2610 | available = 1; | |
2611 | bs1 = NULL; | |
2612 | ||
2613 | while ((bs1 = bdrv_next(bs1))) { | |
2614 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2615 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2616 | if (ret < 0) { | |
2617 | available = 0; | |
2618 | break; | |
2619 | } | |
2620 | } | |
2621 | } | |
2622 | ||
2623 | if (available) { | |
2624 | available_snapshots[total] = i; | |
2625 | total++; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | if (total > 0) { | |
2630 | bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL); | |
2631 | monitor_printf(mon, "\n"); | |
2632 | for (i = 0; i < total; i++) { | |
2633 | sn = &sn_tab[available_snapshots[i]]; | |
2634 | bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, sn); | |
2635 | monitor_printf(mon, "\n"); | |
2636 | } | |
2637 | } else { | |
2638 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2639 | } | |
2640 | ||
2641 | g_free(sn_tab); | |
2642 | g_free(available_snapshots); | |
2643 | ||
2644 | } | |
2645 | ||
2646 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2647 | { | |
2648 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, | |
2649 | memory_region_name(mr), dev); | |
2650 | } | |
2651 | ||
2652 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2653 | { | |
2654 | /* Nothing do to while the implementation is in RAMBlock */ | |
2655 | } | |
2656 | ||
2657 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2658 | { | |
2659 | vmstate_register_ram(mr, NULL); | |
2660 | } |