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