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Commit | Line | Data |
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a672b469 AL |
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 | */ | |
a672b469 AL |
24 | #include <unistd.h> |
25 | #include <fcntl.h> | |
a672b469 AL |
26 | #include <time.h> |
27 | #include <errno.h> | |
28 | #include <sys/time.h> | |
29 | #include <zlib.h> | |
30 | ||
71e72a19 | 31 | /* Needed early for CONFIG_BSD etc. */ |
d40cdb10 BS |
32 | #include "config-host.h" |
33 | ||
a672b469 AL |
34 | #ifndef _WIN32 |
35 | #include <sys/times.h> | |
36 | #include <sys/wait.h> | |
37 | #include <termios.h> | |
38 | #include <sys/mman.h> | |
39 | #include <sys/ioctl.h> | |
40 | #include <sys/resource.h> | |
41 | #include <sys/socket.h> | |
42 | #include <netinet/in.h> | |
43 | #include <net/if.h> | |
a672b469 AL |
44 | #include <arpa/inet.h> |
45 | #include <dirent.h> | |
46 | #include <netdb.h> | |
47 | #include <sys/select.h> | |
71e72a19 | 48 | #ifdef CONFIG_BSD |
a672b469 | 49 | #include <sys/stat.h> |
a167ba50 | 50 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
a672b469 AL |
51 | #include <libutil.h> |
52 | #else | |
53 | #include <util.h> | |
54 | #endif | |
a672b469 AL |
55 | #ifdef __linux__ |
56 | #include <pty.h> | |
57 | #include <malloc.h> | |
58 | #include <linux/rtc.h> | |
59 | #endif | |
60 | #endif | |
61 | #endif | |
62 | ||
63 | #ifdef _WIN32 | |
49dc768d | 64 | #include <windows.h> |
a672b469 AL |
65 | #include <malloc.h> |
66 | #include <sys/timeb.h> | |
67 | #include <mmsystem.h> | |
68 | #define getopt_long_only getopt_long | |
69 | #define memalign(align, size) malloc(size) | |
70 | #endif | |
71 | ||
511d2b14 BS |
72 | #include "qemu-common.h" |
73 | #include "hw/hw.h" | |
7685ee6a | 74 | #include "hw/qdev.h" |
511d2b14 BS |
75 | #include "net.h" |
76 | #include "monitor.h" | |
77 | #include "sysemu.h" | |
78 | #include "qemu-timer.h" | |
79 | #include "qemu-char.h" | |
511d2b14 BS |
80 | #include "audio/audio.h" |
81 | #include "migration.h" | |
82 | #include "qemu_socket.h" | |
72cf2d4f | 83 | #include "qemu-queue.h" |
2ff68d07 | 84 | #include "qemu-timer.h" |
17a4663e | 85 | #include "cpus.h" |
511d2b14 | 86 | |
a672b469 | 87 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 88 | |
18995b98 | 89 | #ifndef ETH_P_RARP |
f8778a77 | 90 | #define ETH_P_RARP 0x8035 |
18995b98 N |
91 | #endif |
92 | #define ARP_HTYPE_ETH 0x0001 | |
93 | #define ARP_PTYPE_IP 0x0800 | |
94 | #define ARP_OP_REQUEST_REV 0x3 | |
95 | ||
96 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
97 | uint8_t *mac_addr) |
98 | { | |
18995b98 N |
99 | /* Ethernet header. */ |
100 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
101 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
102 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
103 | ||
104 | /* RARP header. */ | |
105 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
106 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
107 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
108 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
109 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
110 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
111 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
112 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
113 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
114 | ||
115 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
116 | memset(buf + 42, 0x00, 18); | |
117 | ||
118 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
119 | } |
120 | ||
f401ca22 | 121 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 122 | { |
18995b98 | 123 | uint8_t buf[60]; |
f401ca22 MM |
124 | int len; |
125 | ||
126 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
127 | ||
128 | qemu_send_packet_raw(&nic->nc, buf, len); | |
129 | } | |
130 | ||
131 | ||
132 | static void qemu_announce_self_once(void *opaque) | |
133 | { | |
ed8b330b GN |
134 | static int count = SELF_ANNOUNCE_ROUNDS; |
135 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 136 | |
f401ca22 MM |
137 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
138 | ||
18995b98 N |
139 | if (--count) { |
140 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 141 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 142 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
143 | } else { |
144 | qemu_del_timer(timer); | |
145 | qemu_free_timer(timer); | |
146 | } | |
147 | } | |
148 | ||
149 | void qemu_announce_self(void) | |
150 | { | |
151 | static QEMUTimer *timer; | |
7bd427d8 | 152 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 153 | qemu_announce_self_once(&timer); |
a672b469 AL |
154 | } |
155 | ||
156 | /***********************************************************/ | |
157 | /* savevm/loadvm support */ | |
158 | ||
159 | #define IO_BUF_SIZE 32768 | |
160 | ||
161 | struct QEMUFile { | |
162 | QEMUFilePutBufferFunc *put_buffer; | |
163 | QEMUFileGetBufferFunc *get_buffer; | |
164 | QEMUFileCloseFunc *close; | |
165 | QEMUFileRateLimit *rate_limit; | |
19629537 | 166 | QEMUFileSetRateLimit *set_rate_limit; |
c163b5ca | 167 | QEMUFileGetRateLimit *get_rate_limit; |
a672b469 AL |
168 | void *opaque; |
169 | int is_write; | |
170 | ||
171 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
172 | when reading */ | |
173 | int buf_index; | |
174 | int buf_size; /* 0 when writing */ | |
175 | uint8_t buf[IO_BUF_SIZE]; | |
176 | ||
3961b4dd | 177 | int last_error; |
a672b469 AL |
178 | }; |
179 | ||
7f79dd28 | 180 | typedef struct QEMUFileStdio |
a672b469 | 181 | { |
7f79dd28 | 182 | FILE *stdio_file; |
a672b469 | 183 | QEMUFile *file; |
7f79dd28 | 184 | } QEMUFileStdio; |
a672b469 AL |
185 | |
186 | typedef struct QEMUFileSocket | |
187 | { | |
188 | int fd; | |
189 | QEMUFile *file; | |
190 | } QEMUFileSocket; | |
191 | ||
192 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
193 | { | |
194 | QEMUFileSocket *s = opaque; | |
195 | ssize_t len; | |
196 | ||
197 | do { | |
00aa0040 | 198 | len = qemu_recv(s->fd, buf, size, 0); |
a672b469 AL |
199 | } while (len == -1 && socket_error() == EINTR); |
200 | ||
201 | if (len == -1) | |
202 | len = -socket_error(); | |
203 | ||
204 | return len; | |
205 | } | |
206 | ||
207 | static int socket_close(void *opaque) | |
208 | { | |
209 | QEMUFileSocket *s = opaque; | |
7267c094 | 210 | g_free(s); |
a672b469 AL |
211 | return 0; |
212 | } | |
213 | ||
7f79dd28 | 214 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 215 | { |
7f79dd28 PB |
216 | QEMUFileStdio *s = opaque; |
217 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
218 | } |
219 | ||
7f79dd28 | 220 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 221 | { |
7f79dd28 PB |
222 | QEMUFileStdio *s = opaque; |
223 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
224 | int bytes; |
225 | ||
226 | do { | |
227 | clearerr(fp); | |
228 | bytes = fread(buf, 1, size, fp); | |
229 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); | |
230 | return bytes; | |
a672b469 AL |
231 | } |
232 | ||
7f79dd28 PB |
233 | static int stdio_pclose(void *opaque) |
234 | { | |
235 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
236 | int ret; |
237 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
238 | if (ret == -1) { |
239 | ret = -errno; | |
240 | } | |
7267c094 | 241 | g_free(s); |
41ef56e6 | 242 | return ret; |
7f79dd28 PB |
243 | } |
244 | ||
245 | static int stdio_fclose(void *opaque) | |
a672b469 | 246 | { |
7f79dd28 | 247 | QEMUFileStdio *s = opaque; |
0e286705 EH |
248 | int ret = 0; |
249 | if (fclose(s->stdio_file) == EOF) { | |
250 | ret = -errno; | |
251 | } | |
7267c094 | 252 | g_free(s); |
0e286705 | 253 | return ret; |
a672b469 AL |
254 | } |
255 | ||
7f79dd28 | 256 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 257 | { |
7f79dd28 | 258 | QEMUFileStdio *s; |
a672b469 | 259 | |
7f79dd28 | 260 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
261 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
262 | return NULL; | |
263 | } | |
264 | ||
7267c094 | 265 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 266 | |
7f79dd28 | 267 | s->stdio_file = stdio_file; |
a672b469 AL |
268 | |
269 | if(mode[0] == 'r') { | |
c163b5ca | 270 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, |
271 | NULL, NULL, NULL); | |
a672b469 | 272 | } else { |
c163b5ca | 273 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, |
274 | NULL, NULL, NULL); | |
a672b469 | 275 | } |
a672b469 AL |
276 | return s->file; |
277 | } | |
278 | ||
279 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
280 | { | |
281 | FILE *popen_file; | |
282 | ||
283 | popen_file = popen(command, mode); | |
284 | if(popen_file == NULL) { | |
285 | return NULL; | |
286 | } | |
287 | ||
288 | return qemu_popen(popen_file, mode); | |
289 | } | |
290 | ||
7f79dd28 | 291 | int qemu_stdio_fd(QEMUFile *f) |
8a43b1ea | 292 | { |
7f79dd28 | 293 | QEMUFileStdio *p; |
8a43b1ea CL |
294 | int fd; |
295 | ||
7f79dd28 PB |
296 | p = (QEMUFileStdio *)f->opaque; |
297 | fd = fileno(p->stdio_file); | |
8a43b1ea CL |
298 | |
299 | return fd; | |
300 | } | |
301 | ||
5ac1fad3 PB |
302 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
303 | { | |
304 | QEMUFileStdio *s; | |
305 | ||
306 | if (mode == NULL || | |
307 | (mode[0] != 'r' && mode[0] != 'w') || | |
308 | mode[1] != 'b' || mode[2] != 0) { | |
309 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
310 | return NULL; | |
311 | } | |
312 | ||
7267c094 | 313 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
314 | s->stdio_file = fdopen(fd, mode); |
315 | if (!s->stdio_file) | |
316 | goto fail; | |
317 | ||
318 | if(mode[0] == 'r') { | |
c163b5ca | 319 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, |
320 | NULL, NULL, NULL); | |
5ac1fad3 | 321 | } else { |
c163b5ca | 322 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, |
323 | NULL, NULL, NULL); | |
5ac1fad3 PB |
324 | } |
325 | return s->file; | |
326 | ||
327 | fail: | |
7267c094 | 328 | g_free(s); |
5ac1fad3 PB |
329 | return NULL; |
330 | } | |
331 | ||
a672b469 AL |
332 | QEMUFile *qemu_fopen_socket(int fd) |
333 | { | |
7267c094 | 334 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 335 | |
a672b469 | 336 | s->fd = fd; |
c163b5ca | 337 | s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, |
338 | NULL, NULL, NULL); | |
a672b469 AL |
339 | return s->file; |
340 | } | |
341 | ||
a672b469 AL |
342 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
343 | int64_t pos, int size) | |
344 | { | |
345 | QEMUFileStdio *s = opaque; | |
7f79dd28 | 346 | fseek(s->stdio_file, pos, SEEK_SET); |
5fdb3aa1 | 347 | return fwrite(buf, 1, size, s->stdio_file); |
a672b469 AL |
348 | } |
349 | ||
350 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
351 | { | |
352 | QEMUFileStdio *s = opaque; | |
7f79dd28 PB |
353 | fseek(s->stdio_file, pos, SEEK_SET); |
354 | return fread(buf, 1, size, s->stdio_file); | |
a672b469 AL |
355 | } |
356 | ||
357 | QEMUFile *qemu_fopen(const char *filename, const char *mode) | |
358 | { | |
359 | QEMUFileStdio *s; | |
360 | ||
7f79dd28 PB |
361 | if (mode == NULL || |
362 | (mode[0] != 'r' && mode[0] != 'w') || | |
363 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 364 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
365 | return NULL; |
366 | } | |
367 | ||
7267c094 | 368 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 369 | |
7f79dd28 PB |
370 | s->stdio_file = fopen(filename, mode); |
371 | if (!s->stdio_file) | |
a672b469 | 372 | goto fail; |
c163b5ca | 373 | |
7f79dd28 | 374 | if(mode[0] == 'w') { |
c163b5ca | 375 | s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, |
376 | NULL, NULL, NULL); | |
7f79dd28 | 377 | } else { |
c163b5ca | 378 | s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, |
379 | NULL, NULL, NULL); | |
7f79dd28 PB |
380 | } |
381 | return s->file; | |
a672b469 | 382 | fail: |
7267c094 | 383 | g_free(s); |
a672b469 AL |
384 | return NULL; |
385 | } | |
386 | ||
178e08a5 | 387 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
388 | int64_t pos, int size) |
389 | { | |
45566e9c | 390 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
391 | return size; |
392 | } | |
393 | ||
178e08a5 | 394 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 395 | { |
45566e9c | 396 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
397 | } |
398 | ||
399 | static int bdrv_fclose(void *opaque) | |
400 | { | |
a672b469 AL |
401 | return 0; |
402 | } | |
403 | ||
45566e9c | 404 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 405 | { |
a672b469 | 406 | if (is_writable) |
c163b5ca | 407 | return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
408 | NULL, NULL, NULL); | |
409 | return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); | |
a672b469 AL |
410 | } |
411 | ||
412 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, | |
413 | QEMUFileGetBufferFunc *get_buffer, | |
414 | QEMUFileCloseFunc *close, | |
19629537 | 415 | QEMUFileRateLimit *rate_limit, |
c163b5ca | 416 | QEMUFileSetRateLimit *set_rate_limit, |
417 | QEMUFileGetRateLimit *get_rate_limit) | |
a672b469 AL |
418 | { |
419 | QEMUFile *f; | |
420 | ||
7267c094 | 421 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
422 | |
423 | f->opaque = opaque; | |
424 | f->put_buffer = put_buffer; | |
425 | f->get_buffer = get_buffer; | |
426 | f->close = close; | |
427 | f->rate_limit = rate_limit; | |
19629537 | 428 | f->set_rate_limit = set_rate_limit; |
c163b5ca | 429 | f->get_rate_limit = get_rate_limit; |
a672b469 AL |
430 | f->is_write = 0; |
431 | ||
432 | return f; | |
433 | } | |
434 | ||
624b9cc2 | 435 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 436 | { |
3961b4dd | 437 | return f->last_error; |
a672b469 AL |
438 | } |
439 | ||
dcd1d224 | 440 | void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 441 | { |
3961b4dd | 442 | f->last_error = ret; |
4dabe248 AL |
443 | } |
444 | ||
d82ca915 EH |
445 | /** Sets last_error conditionally |
446 | * | |
447 | * Sets last_error only if ret is negative _and_ no error | |
448 | * was set before. | |
449 | */ | |
450 | static void qemu_file_set_if_error(QEMUFile *f, int ret) | |
451 | { | |
452 | if (ret < 0 && !f->last_error) { | |
453 | qemu_file_set_error(f, ret); | |
454 | } | |
455 | } | |
456 | ||
457 | /** Flushes QEMUFile buffer | |
458 | * | |
459 | * In case of error, last_error is set. | |
460 | */ | |
a672b469 AL |
461 | void qemu_fflush(QEMUFile *f) |
462 | { | |
463 | if (!f->put_buffer) | |
464 | return; | |
465 | ||
466 | if (f->is_write && f->buf_index > 0) { | |
467 | int len; | |
468 | ||
469 | len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); | |
470 | if (len > 0) | |
471 | f->buf_offset += f->buf_index; | |
472 | else | |
c29110d5 | 473 | qemu_file_set_error(f, -EINVAL); |
a672b469 AL |
474 | f->buf_index = 0; |
475 | } | |
476 | } | |
477 | ||
478 | static void qemu_fill_buffer(QEMUFile *f) | |
479 | { | |
480 | int len; | |
0046c45b | 481 | int pending; |
a672b469 AL |
482 | |
483 | if (!f->get_buffer) | |
484 | return; | |
485 | ||
486 | if (f->is_write) | |
487 | abort(); | |
488 | ||
0046c45b JQ |
489 | pending = f->buf_size - f->buf_index; |
490 | if (pending > 0) { | |
491 | memmove(f->buf, f->buf + f->buf_index, pending); | |
492 | } | |
493 | f->buf_index = 0; | |
494 | f->buf_size = pending; | |
495 | ||
496 | len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, | |
497 | IO_BUF_SIZE - pending); | |
a672b469 | 498 | if (len > 0) { |
0046c45b | 499 | f->buf_size += len; |
a672b469 | 500 | f->buf_offset += len; |
fa39a30f JQ |
501 | } else if (len == 0) { |
502 | f->last_error = -EIO; | |
a672b469 | 503 | } else if (len != -EAGAIN) |
c29110d5 | 504 | qemu_file_set_error(f, len); |
a672b469 AL |
505 | } |
506 | ||
d82ca915 EH |
507 | /** Calls close function and set last_error if needed |
508 | * | |
509 | * Internal function. qemu_fflush() must be called before this. | |
510 | * | |
511 | * Returns f->close() return value, or 0 if close function is not set. | |
512 | */ | |
513 | static int qemu_close(QEMUFile *f) | |
a672b469 AL |
514 | { |
515 | int ret = 0; | |
d82ca915 | 516 | if (f->close) { |
a672b469 | 517 | ret = f->close(f->opaque); |
d82ca915 EH |
518 | qemu_file_set_if_error(f, ret); |
519 | } | |
520 | return ret; | |
521 | } | |
522 | ||
523 | /** Closes the file | |
524 | * | |
525 | * Returns negative error value if any error happened on previous operations or | |
526 | * while closing the file. Returns 0 or positive number on success. | |
527 | * | |
528 | * The meaning of return value on success depends on the specific backend | |
529 | * being used. | |
530 | */ | |
531 | int qemu_fclose(QEMUFile *f) | |
532 | { | |
533 | int ret; | |
534 | qemu_fflush(f); | |
535 | ret = qemu_close(f); | |
536 | /* If any error was spotted before closing, we should report it | |
537 | * instead of the close() return value. | |
538 | */ | |
539 | if (f->last_error) { | |
540 | ret = f->last_error; | |
541 | } | |
7267c094 | 542 | g_free(f); |
a672b469 AL |
543 | return ret; |
544 | } | |
545 | ||
546 | void qemu_file_put_notify(QEMUFile *f) | |
547 | { | |
548 | f->put_buffer(f->opaque, NULL, 0, 0); | |
549 | } | |
550 | ||
551 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
552 | { | |
553 | int l; | |
554 | ||
3961b4dd | 555 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
556 | fprintf(stderr, |
557 | "Attempted to write to buffer while read buffer is not empty\n"); | |
558 | abort(); | |
559 | } | |
560 | ||
3961b4dd | 561 | while (!f->last_error && size > 0) { |
a672b469 AL |
562 | l = IO_BUF_SIZE - f->buf_index; |
563 | if (l > size) | |
564 | l = size; | |
565 | memcpy(f->buf + f->buf_index, buf, l); | |
566 | f->is_write = 1; | |
567 | f->buf_index += l; | |
568 | buf += l; | |
569 | size -= l; | |
570 | if (f->buf_index >= IO_BUF_SIZE) | |
571 | qemu_fflush(f); | |
572 | } | |
573 | } | |
574 | ||
575 | void qemu_put_byte(QEMUFile *f, int v) | |
576 | { | |
3961b4dd | 577 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
578 | fprintf(stderr, |
579 | "Attempted to write to buffer while read buffer is not empty\n"); | |
580 | abort(); | |
581 | } | |
582 | ||
583 | f->buf[f->buf_index++] = v; | |
584 | f->is_write = 1; | |
585 | if (f->buf_index >= IO_BUF_SIZE) | |
586 | qemu_fflush(f); | |
587 | } | |
588 | ||
c6380724 | 589 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 590 | { |
c6380724 JQ |
591 | if (f->buf_index + size <= f->buf_size) { |
592 | f->buf_index += size; | |
593 | } | |
594 | } | |
595 | ||
596 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 597 | { |
c6380724 JQ |
598 | int pending; |
599 | int index; | |
a672b469 | 600 | |
b9ce1454 | 601 | if (f->is_write) { |
a672b469 | 602 | abort(); |
b9ce1454 | 603 | } |
a672b469 | 604 | |
c6380724 JQ |
605 | index = f->buf_index + offset; |
606 | pending = f->buf_size - index; | |
607 | if (pending < size) { | |
608 | qemu_fill_buffer(f); | |
609 | index = f->buf_index + offset; | |
610 | pending = f->buf_size - index; | |
611 | } | |
612 | ||
613 | if (pending <= 0) { | |
614 | return 0; | |
615 | } | |
616 | if (size > pending) { | |
617 | size = pending; | |
618 | } | |
619 | ||
620 | memcpy(buf, f->buf + index, size); | |
621 | return size; | |
622 | } | |
623 | ||
624 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
625 | { | |
626 | int pending = size; | |
627 | int done = 0; | |
628 | ||
629 | while (pending > 0) { | |
630 | int res; | |
631 | ||
632 | res = qemu_peek_buffer(f, buf, pending, 0); | |
633 | if (res == 0) { | |
634 | return done; | |
a672b469 | 635 | } |
c6380724 JQ |
636 | qemu_file_skip(f, res); |
637 | buf += res; | |
638 | pending -= res; | |
639 | done += res; | |
a672b469 | 640 | } |
c6380724 | 641 | return done; |
a672b469 AL |
642 | } |
643 | ||
c6380724 | 644 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 645 | { |
c6380724 JQ |
646 | int index = f->buf_index + offset; |
647 | ||
b9ce1454 | 648 | if (f->is_write) { |
811814bd | 649 | abort(); |
b9ce1454 | 650 | } |
811814bd | 651 | |
c6380724 | 652 | if (index >= f->buf_size) { |
811814bd | 653 | qemu_fill_buffer(f); |
c6380724 JQ |
654 | index = f->buf_index + offset; |
655 | if (index >= f->buf_size) { | |
811814bd | 656 | return 0; |
b9ce1454 | 657 | } |
811814bd | 658 | } |
c6380724 | 659 | return f->buf[index]; |
811814bd JQ |
660 | } |
661 | ||
a672b469 AL |
662 | int qemu_get_byte(QEMUFile *f) |
663 | { | |
65f3bb3d | 664 | int result; |
a672b469 | 665 | |
c6380724 JQ |
666 | result = qemu_peek_byte(f, 0); |
667 | qemu_file_skip(f, 1); | |
65f3bb3d | 668 | return result; |
a672b469 AL |
669 | } |
670 | ||
671 | int64_t qemu_ftell(QEMUFile *f) | |
672 | { | |
673 | return f->buf_offset - f->buf_size + f->buf_index; | |
674 | } | |
675 | ||
676 | int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence) | |
677 | { | |
678 | if (whence == SEEK_SET) { | |
679 | /* nothing to do */ | |
680 | } else if (whence == SEEK_CUR) { | |
681 | pos += qemu_ftell(f); | |
682 | } else { | |
683 | /* SEEK_END not supported */ | |
684 | return -1; | |
685 | } | |
686 | if (f->put_buffer) { | |
687 | qemu_fflush(f); | |
688 | f->buf_offset = pos; | |
689 | } else { | |
690 | f->buf_offset = pos; | |
691 | f->buf_index = 0; | |
692 | f->buf_size = 0; | |
693 | } | |
694 | return pos; | |
695 | } | |
696 | ||
697 | int qemu_file_rate_limit(QEMUFile *f) | |
698 | { | |
699 | if (f->rate_limit) | |
700 | return f->rate_limit(f->opaque); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
3d002df3 | 705 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 706 | { |
707 | if (f->get_rate_limit) | |
708 | return f->get_rate_limit(f->opaque); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
3d002df3 | 713 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 714 | { |
0bb05eaf GC |
715 | /* any failed or completed migration keeps its state to allow probing of |
716 | * migration data, but has no associated file anymore */ | |
717 | if (f && f->set_rate_limit) | |
19629537 GC |
718 | return f->set_rate_limit(f->opaque, new_rate); |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
a672b469 AL |
723 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
724 | { | |
725 | qemu_put_byte(f, v >> 8); | |
726 | qemu_put_byte(f, v); | |
727 | } | |
728 | ||
729 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
730 | { | |
731 | qemu_put_byte(f, v >> 24); | |
732 | qemu_put_byte(f, v >> 16); | |
733 | qemu_put_byte(f, v >> 8); | |
734 | qemu_put_byte(f, v); | |
735 | } | |
736 | ||
737 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
738 | { | |
739 | qemu_put_be32(f, v >> 32); | |
740 | qemu_put_be32(f, v); | |
741 | } | |
742 | ||
743 | unsigned int qemu_get_be16(QEMUFile *f) | |
744 | { | |
745 | unsigned int v; | |
746 | v = qemu_get_byte(f) << 8; | |
747 | v |= qemu_get_byte(f); | |
748 | return v; | |
749 | } | |
750 | ||
751 | unsigned int qemu_get_be32(QEMUFile *f) | |
752 | { | |
753 | unsigned int v; | |
754 | v = qemu_get_byte(f) << 24; | |
755 | v |= qemu_get_byte(f) << 16; | |
756 | v |= qemu_get_byte(f) << 8; | |
757 | v |= qemu_get_byte(f); | |
758 | return v; | |
759 | } | |
760 | ||
761 | uint64_t qemu_get_be64(QEMUFile *f) | |
762 | { | |
763 | uint64_t v; | |
764 | v = (uint64_t)qemu_get_be32(f) << 32; | |
765 | v |= qemu_get_be32(f); | |
766 | return v; | |
767 | } | |
768 | ||
2ff68d07 PB |
769 | |
770 | /* timer */ | |
771 | ||
772 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
773 | { | |
774 | uint64_t expire_time; | |
775 | ||
776 | expire_time = qemu_timer_expire_time_ns(ts); | |
777 | qemu_put_be64(f, expire_time); | |
778 | } | |
779 | ||
780 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
781 | { | |
782 | uint64_t expire_time; | |
783 | ||
784 | expire_time = qemu_get_be64(f); | |
785 | if (expire_time != -1) { | |
786 | qemu_mod_timer_ns(ts, expire_time); | |
787 | } else { | |
788 | qemu_del_timer(ts); | |
789 | } | |
790 | } | |
791 | ||
792 | ||
cdae5cfb GH |
793 | /* bool */ |
794 | ||
795 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
796 | { | |
797 | bool *v = pv; | |
798 | *v = qemu_get_byte(f); | |
799 | return 0; | |
800 | } | |
801 | ||
802 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
803 | { | |
804 | bool *v = pv; | |
805 | qemu_put_byte(f, *v); | |
806 | } | |
807 | ||
808 | const VMStateInfo vmstate_info_bool = { | |
809 | .name = "bool", | |
810 | .get = get_bool, | |
811 | .put = put_bool, | |
812 | }; | |
813 | ||
9ed7d6ae JQ |
814 | /* 8 bit int */ |
815 | ||
816 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
817 | { | |
818 | int8_t *v = pv; | |
819 | qemu_get_s8s(f, v); | |
820 | return 0; | |
821 | } | |
822 | ||
84e2e3eb | 823 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 824 | { |
84e2e3eb | 825 | int8_t *v = pv; |
9ed7d6ae JQ |
826 | qemu_put_s8s(f, v); |
827 | } | |
828 | ||
829 | const VMStateInfo vmstate_info_int8 = { | |
830 | .name = "int8", | |
831 | .get = get_int8, | |
832 | .put = put_int8, | |
833 | }; | |
834 | ||
835 | /* 16 bit int */ | |
836 | ||
837 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
838 | { | |
839 | int16_t *v = pv; | |
840 | qemu_get_sbe16s(f, v); | |
841 | return 0; | |
842 | } | |
843 | ||
84e2e3eb | 844 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 845 | { |
84e2e3eb | 846 | int16_t *v = pv; |
9ed7d6ae JQ |
847 | qemu_put_sbe16s(f, v); |
848 | } | |
849 | ||
850 | const VMStateInfo vmstate_info_int16 = { | |
851 | .name = "int16", | |
852 | .get = get_int16, | |
853 | .put = put_int16, | |
854 | }; | |
855 | ||
856 | /* 32 bit int */ | |
857 | ||
858 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
859 | { | |
860 | int32_t *v = pv; | |
861 | qemu_get_sbe32s(f, v); | |
862 | return 0; | |
863 | } | |
864 | ||
84e2e3eb | 865 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 866 | { |
84e2e3eb | 867 | int32_t *v = pv; |
9ed7d6ae JQ |
868 | qemu_put_sbe32s(f, v); |
869 | } | |
870 | ||
871 | const VMStateInfo vmstate_info_int32 = { | |
872 | .name = "int32", | |
873 | .get = get_int32, | |
874 | .put = put_int32, | |
875 | }; | |
876 | ||
82501660 JQ |
877 | /* 32 bit int. See that the received value is the same than the one |
878 | in the field */ | |
879 | ||
880 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
881 | { | |
882 | int32_t *v = pv; | |
883 | int32_t v2; | |
884 | qemu_get_sbe32s(f, &v2); | |
885 | ||
886 | if (*v == v2) | |
887 | return 0; | |
888 | return -EINVAL; | |
889 | } | |
890 | ||
891 | const VMStateInfo vmstate_info_int32_equal = { | |
892 | .name = "int32 equal", | |
893 | .get = get_int32_equal, | |
894 | .put = put_int32, | |
895 | }; | |
896 | ||
0a031e0a JQ |
897 | /* 32 bit int. See that the received value is the less or the same |
898 | than the one in the field */ | |
899 | ||
900 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
901 | { | |
902 | int32_t *old = pv; | |
903 | int32_t new; | |
904 | qemu_get_sbe32s(f, &new); | |
905 | ||
906 | if (*old <= new) | |
907 | return 0; | |
908 | return -EINVAL; | |
909 | } | |
910 | ||
911 | const VMStateInfo vmstate_info_int32_le = { | |
912 | .name = "int32 equal", | |
913 | .get = get_int32_le, | |
914 | .put = put_int32, | |
915 | }; | |
916 | ||
9ed7d6ae JQ |
917 | /* 64 bit int */ |
918 | ||
919 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
920 | { | |
921 | int64_t *v = pv; | |
922 | qemu_get_sbe64s(f, v); | |
923 | return 0; | |
924 | } | |
925 | ||
84e2e3eb | 926 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 927 | { |
84e2e3eb | 928 | int64_t *v = pv; |
9ed7d6ae JQ |
929 | qemu_put_sbe64s(f, v); |
930 | } | |
931 | ||
932 | const VMStateInfo vmstate_info_int64 = { | |
933 | .name = "int64", | |
934 | .get = get_int64, | |
935 | .put = put_int64, | |
936 | }; | |
937 | ||
938 | /* 8 bit unsigned int */ | |
939 | ||
940 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
941 | { | |
942 | uint8_t *v = pv; | |
943 | qemu_get_8s(f, v); | |
944 | return 0; | |
945 | } | |
946 | ||
84e2e3eb | 947 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 948 | { |
84e2e3eb | 949 | uint8_t *v = pv; |
9ed7d6ae JQ |
950 | qemu_put_8s(f, v); |
951 | } | |
952 | ||
953 | const VMStateInfo vmstate_info_uint8 = { | |
954 | .name = "uint8", | |
955 | .get = get_uint8, | |
956 | .put = put_uint8, | |
957 | }; | |
958 | ||
959 | /* 16 bit unsigned int */ | |
960 | ||
961 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
962 | { | |
963 | uint16_t *v = pv; | |
964 | qemu_get_be16s(f, v); | |
965 | return 0; | |
966 | } | |
967 | ||
84e2e3eb | 968 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 969 | { |
84e2e3eb | 970 | uint16_t *v = pv; |
9ed7d6ae JQ |
971 | qemu_put_be16s(f, v); |
972 | } | |
973 | ||
974 | const VMStateInfo vmstate_info_uint16 = { | |
975 | .name = "uint16", | |
976 | .get = get_uint16, | |
977 | .put = put_uint16, | |
978 | }; | |
979 | ||
980 | /* 32 bit unsigned int */ | |
981 | ||
982 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
983 | { | |
984 | uint32_t *v = pv; | |
985 | qemu_get_be32s(f, v); | |
986 | return 0; | |
987 | } | |
988 | ||
84e2e3eb | 989 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 990 | { |
84e2e3eb | 991 | uint32_t *v = pv; |
9ed7d6ae JQ |
992 | qemu_put_be32s(f, v); |
993 | } | |
994 | ||
995 | const VMStateInfo vmstate_info_uint32 = { | |
996 | .name = "uint32", | |
997 | .get = get_uint32, | |
998 | .put = put_uint32, | |
999 | }; | |
1000 | ||
9122a8fe JQ |
1001 | /* 32 bit uint. See that the received value is the same than the one |
1002 | in the field */ | |
1003 | ||
1004 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1005 | { | |
1006 | uint32_t *v = pv; | |
1007 | uint32_t v2; | |
1008 | qemu_get_be32s(f, &v2); | |
1009 | ||
1010 | if (*v == v2) { | |
1011 | return 0; | |
1012 | } | |
1013 | return -EINVAL; | |
1014 | } | |
1015 | ||
1016 | const VMStateInfo vmstate_info_uint32_equal = { | |
1017 | .name = "uint32 equal", | |
1018 | .get = get_uint32_equal, | |
1019 | .put = put_uint32, | |
1020 | }; | |
1021 | ||
9ed7d6ae JQ |
1022 | /* 64 bit unsigned int */ |
1023 | ||
1024 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1025 | { | |
1026 | uint64_t *v = pv; | |
1027 | qemu_get_be64s(f, v); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
84e2e3eb | 1031 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1032 | { |
84e2e3eb | 1033 | uint64_t *v = pv; |
9ed7d6ae JQ |
1034 | qemu_put_be64s(f, v); |
1035 | } | |
1036 | ||
1037 | const VMStateInfo vmstate_info_uint64 = { | |
1038 | .name = "uint64", | |
1039 | .get = get_uint64, | |
1040 | .put = put_uint64, | |
1041 | }; | |
1042 | ||
80cd83e7 JQ |
1043 | /* 8 bit int. See that the received value is the same than the one |
1044 | in the field */ | |
1045 | ||
1046 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1047 | { | |
1048 | uint8_t *v = pv; | |
1049 | uint8_t v2; | |
1050 | qemu_get_8s(f, &v2); | |
1051 | ||
1052 | if (*v == v2) | |
1053 | return 0; | |
1054 | return -EINVAL; | |
1055 | } | |
1056 | ||
1057 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1058 | .name = "uint8 equal", |
80cd83e7 JQ |
1059 | .get = get_uint8_equal, |
1060 | .put = put_uint8, | |
1061 | }; | |
1062 | ||
dc3b83a0 JQ |
1063 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1064 | in the field */ | |
1065 | ||
1066 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1067 | { | |
1068 | uint16_t *v = pv; | |
1069 | uint16_t v2; | |
1070 | qemu_get_be16s(f, &v2); | |
1071 | ||
1072 | if (*v == v2) | |
1073 | return 0; | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | ||
1077 | const VMStateInfo vmstate_info_uint16_equal = { | |
1078 | .name = "uint16 equal", | |
1079 | .get = get_uint16_equal, | |
1080 | .put = put_uint16, | |
1081 | }; | |
1082 | ||
dde0463b JQ |
1083 | /* timers */ |
1084 | ||
1085 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1086 | { | |
1087 | QEMUTimer *v = pv; | |
1088 | qemu_get_timer(f, v); | |
1089 | return 0; | |
1090 | } | |
1091 | ||
84e2e3eb | 1092 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1093 | { |
84e2e3eb | 1094 | QEMUTimer *v = pv; |
dde0463b JQ |
1095 | qemu_put_timer(f, v); |
1096 | } | |
1097 | ||
1098 | const VMStateInfo vmstate_info_timer = { | |
1099 | .name = "timer", | |
1100 | .get = get_timer, | |
1101 | .put = put_timer, | |
1102 | }; | |
1103 | ||
6f67c50f JQ |
1104 | /* uint8_t buffers */ |
1105 | ||
1106 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1107 | { | |
1108 | uint8_t *v = pv; | |
1109 | qemu_get_buffer(f, v, size); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
84e2e3eb | 1113 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1114 | { |
84e2e3eb | 1115 | uint8_t *v = pv; |
6f67c50f JQ |
1116 | qemu_put_buffer(f, v, size); |
1117 | } | |
1118 | ||
1119 | const VMStateInfo vmstate_info_buffer = { | |
1120 | .name = "buffer", | |
1121 | .get = get_buffer, | |
1122 | .put = put_buffer, | |
1123 | }; | |
1124 | ||
76507c75 | 1125 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1126 | not useful anymore */ |
76507c75 JQ |
1127 | |
1128 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1129 | { | |
21174c34 JK |
1130 | uint8_t buf[1024]; |
1131 | int block_len; | |
1132 | ||
1133 | while (size > 0) { | |
1134 | block_len = MIN(sizeof(buf), size); | |
1135 | size -= block_len; | |
1136 | qemu_get_buffer(f, buf, block_len); | |
1137 | } | |
1138 | return 0; | |
76507c75 JQ |
1139 | } |
1140 | ||
1141 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1142 | { | |
21174c34 JK |
1143 | static const uint8_t buf[1024]; |
1144 | int block_len; | |
1145 | ||
1146 | while (size > 0) { | |
1147 | block_len = MIN(sizeof(buf), size); | |
1148 | size -= block_len; | |
1149 | qemu_put_buffer(f, buf, block_len); | |
1150 | } | |
76507c75 JQ |
1151 | } |
1152 | ||
1153 | const VMStateInfo vmstate_info_unused_buffer = { | |
1154 | .name = "unused_buffer", | |
1155 | .get = get_unused_buffer, | |
1156 | .put = put_unused_buffer, | |
1157 | }; | |
1158 | ||
7685ee6a AW |
1159 | typedef struct CompatEntry { |
1160 | char idstr[256]; | |
1161 | int instance_id; | |
1162 | } CompatEntry; | |
1163 | ||
a672b469 | 1164 | typedef struct SaveStateEntry { |
72cf2d4f | 1165 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1166 | char idstr[256]; |
1167 | int instance_id; | |
4d2ffa08 | 1168 | int alias_id; |
a672b469 AL |
1169 | int version_id; |
1170 | int section_id; | |
c163b5ca | 1171 | SaveSetParamsHandler *set_params; |
a672b469 AL |
1172 | SaveLiveStateHandler *save_live_state; |
1173 | SaveStateHandler *save_state; | |
1174 | LoadStateHandler *load_state; | |
9ed7d6ae | 1175 | const VMStateDescription *vmsd; |
a672b469 | 1176 | void *opaque; |
7685ee6a | 1177 | CompatEntry *compat; |
24312968 | 1178 | int no_migrate; |
a672b469 AL |
1179 | } SaveStateEntry; |
1180 | ||
c163b5ca | 1181 | |
72cf2d4f BS |
1182 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1183 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1184 | static int global_section_id; |
a672b469 | 1185 | |
8718e999 JQ |
1186 | static int calculate_new_instance_id(const char *idstr) |
1187 | { | |
1188 | SaveStateEntry *se; | |
1189 | int instance_id = 0; | |
1190 | ||
72cf2d4f | 1191 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1192 | if (strcmp(idstr, se->idstr) == 0 |
1193 | && instance_id <= se->instance_id) { | |
1194 | instance_id = se->instance_id + 1; | |
1195 | } | |
1196 | } | |
1197 | return instance_id; | |
1198 | } | |
1199 | ||
7685ee6a AW |
1200 | static int calculate_compat_instance_id(const char *idstr) |
1201 | { | |
1202 | SaveStateEntry *se; | |
1203 | int instance_id = 0; | |
1204 | ||
1205 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1206 | if (!se->compat) | |
1207 | continue; | |
1208 | ||
1209 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1210 | && instance_id <= se->compat->instance_id) { | |
1211 | instance_id = se->compat->instance_id + 1; | |
1212 | } | |
1213 | } | |
1214 | return instance_id; | |
1215 | } | |
1216 | ||
a672b469 AL |
1217 | /* TODO: Individual devices generally have very little idea about the rest |
1218 | of the system, so instance_id should be removed/replaced. | |
1219 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1220 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1221 | int register_savevm_live(DeviceState *dev, |
1222 | const char *idstr, | |
a672b469 AL |
1223 | int instance_id, |
1224 | int version_id, | |
c163b5ca | 1225 | SaveSetParamsHandler *set_params, |
a672b469 AL |
1226 | SaveLiveStateHandler *save_live_state, |
1227 | SaveStateHandler *save_state, | |
1228 | LoadStateHandler *load_state, | |
1229 | void *opaque) | |
1230 | { | |
8718e999 | 1231 | SaveStateEntry *se; |
a672b469 | 1232 | |
7267c094 | 1233 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1234 | se->version_id = version_id; |
1235 | se->section_id = global_section_id++; | |
c163b5ca | 1236 | se->set_params = set_params; |
a672b469 AL |
1237 | se->save_live_state = save_live_state; |
1238 | se->save_state = save_state; | |
1239 | se->load_state = load_state; | |
1240 | se->opaque = opaque; | |
9ed7d6ae | 1241 | se->vmsd = NULL; |
24312968 | 1242 | se->no_migrate = 0; |
a672b469 | 1243 | |
7685ee6a AW |
1244 | if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { |
1245 | char *id = dev->parent_bus->info->get_dev_path(dev); | |
1246 | if (id) { | |
1247 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1248 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1249 | g_free(id); |
7685ee6a | 1250 | |
7267c094 | 1251 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1252 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1253 | se->compat->instance_id = instance_id == -1 ? | |
1254 | calculate_compat_instance_id(idstr) : instance_id; | |
1255 | instance_id = -1; | |
1256 | } | |
1257 | } | |
1258 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1259 | ||
8718e999 | 1260 | if (instance_id == -1) { |
7685ee6a | 1261 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1262 | } else { |
1263 | se->instance_id = instance_id; | |
a672b469 | 1264 | } |
7685ee6a | 1265 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1266 | /* add at the end of list */ |
72cf2d4f | 1267 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1268 | return 0; |
1269 | } | |
1270 | ||
0be71e32 AW |
1271 | int register_savevm(DeviceState *dev, |
1272 | const char *idstr, | |
a672b469 AL |
1273 | int instance_id, |
1274 | int version_id, | |
1275 | SaveStateHandler *save_state, | |
1276 | LoadStateHandler *load_state, | |
1277 | void *opaque) | |
1278 | { | |
0be71e32 | 1279 | return register_savevm_live(dev, idstr, instance_id, version_id, |
c163b5ca | 1280 | NULL, NULL, save_state, load_state, opaque); |
a672b469 AL |
1281 | } |
1282 | ||
0be71e32 | 1283 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1284 | { |
8718e999 | 1285 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1286 | char id[256] = ""; |
1287 | ||
1288 | if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { | |
1289 | char *path = dev->parent_bus->info->get_dev_path(dev); | |
1290 | if (path) { | |
1291 | pstrcpy(id, sizeof(id), path); | |
1292 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1293 | g_free(path); |
7685ee6a AW |
1294 | } |
1295 | } | |
1296 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1297 | |
72cf2d4f | 1298 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1299 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1300 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1301 | if (se->compat) { |
7267c094 | 1302 | g_free(se->compat); |
69e58af9 | 1303 | } |
7267c094 | 1304 | g_free(se); |
41bd13af | 1305 | } |
41bd13af AL |
1306 | } |
1307 | } | |
1308 | ||
0be71e32 | 1309 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1310 | const VMStateDescription *vmsd, |
1311 | void *opaque, int alias_id, | |
1312 | int required_for_version) | |
9ed7d6ae | 1313 | { |
8718e999 | 1314 | SaveStateEntry *se; |
9ed7d6ae | 1315 | |
4d2ffa08 JK |
1316 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1317 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1318 | ||
7267c094 | 1319 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1320 | se->version_id = vmsd->version_id; |
1321 | se->section_id = global_section_id++; | |
1322 | se->save_live_state = NULL; | |
1323 | se->save_state = NULL; | |
1324 | se->load_state = NULL; | |
1325 | se->opaque = opaque; | |
1326 | se->vmsd = vmsd; | |
4d2ffa08 | 1327 | se->alias_id = alias_id; |
2837c8ea | 1328 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1329 | |
7685ee6a AW |
1330 | if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { |
1331 | char *id = dev->parent_bus->info->get_dev_path(dev); | |
1332 | if (id) { | |
1333 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1334 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1335 | g_free(id); |
7685ee6a | 1336 | |
7267c094 | 1337 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1338 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1339 | se->compat->instance_id = instance_id == -1 ? | |
1340 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1341 | instance_id = -1; | |
1342 | } | |
1343 | } | |
1344 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1345 | ||
8718e999 | 1346 | if (instance_id == -1) { |
7685ee6a | 1347 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1348 | } else { |
1349 | se->instance_id = instance_id; | |
9ed7d6ae | 1350 | } |
7685ee6a | 1351 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1352 | /* add at the end of list */ |
72cf2d4f | 1353 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1354 | return 0; |
1355 | } | |
1356 | ||
0be71e32 AW |
1357 | int vmstate_register(DeviceState *dev, int instance_id, |
1358 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1359 | { |
0be71e32 AW |
1360 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1361 | opaque, -1, 0); | |
4d2ffa08 JK |
1362 | } |
1363 | ||
0be71e32 AW |
1364 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1365 | void *opaque) | |
9ed7d6ae | 1366 | { |
1eb7538b JQ |
1367 | SaveStateEntry *se, *new_se; |
1368 | ||
72cf2d4f | 1369 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1370 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1371 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1372 | if (se->compat) { |
7267c094 | 1373 | g_free(se->compat); |
69e58af9 | 1374 | } |
7267c094 | 1375 | g_free(se); |
1eb7538b JQ |
1376 | } |
1377 | } | |
9ed7d6ae JQ |
1378 | } |
1379 | ||
811814bd JQ |
1380 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1381 | void *opaque); | |
1382 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1383 | void *opaque); | |
1384 | ||
9ed7d6ae JQ |
1385 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1386 | void *opaque, int version_id) | |
1387 | { | |
1388 | VMStateField *field = vmsd->fields; | |
811814bd | 1389 | int ret; |
9ed7d6ae JQ |
1390 | |
1391 | if (version_id > vmsd->version_id) { | |
1392 | return -EINVAL; | |
1393 | } | |
1394 | if (version_id < vmsd->minimum_version_id_old) { | |
1395 | return -EINVAL; | |
1396 | } | |
1397 | if (version_id < vmsd->minimum_version_id) { | |
1398 | return vmsd->load_state_old(f, opaque, version_id); | |
1399 | } | |
fd4d52de JQ |
1400 | if (vmsd->pre_load) { |
1401 | int ret = vmsd->pre_load(opaque); | |
1402 | if (ret) | |
1403 | return ret; | |
1404 | } | |
9ed7d6ae | 1405 | while(field->name) { |
f11f6a5f JQ |
1406 | if ((field->field_exists && |
1407 | field->field_exists(opaque, version_id)) || | |
1408 | (!field->field_exists && | |
1409 | field->version_id <= version_id)) { | |
f752a6aa | 1410 | void *base_addr = opaque + field->offset; |
811814bd | 1411 | int i, n_elems = 1; |
e61a1e0a | 1412 | int size = field->size; |
9ed7d6ae | 1413 | |
e61a1e0a JQ |
1414 | if (field->flags & VMS_VBUFFER) { |
1415 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1416 | if (field->flags & VMS_MULTIPLY) { |
1417 | size *= field->size; | |
1418 | } | |
e61a1e0a | 1419 | } |
f752a6aa JQ |
1420 | if (field->flags & VMS_ARRAY) { |
1421 | n_elems = field->num; | |
d6698281 JQ |
1422 | } else if (field->flags & VMS_VARRAY_INT32) { |
1423 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1424 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1425 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1426 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1427 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1428 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1429 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1430 | } |
dde0463b | 1431 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1432 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1433 | } |
f752a6aa | 1434 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1435 | void *addr = base_addr + size * i; |
ec245e21 | 1436 | |
19df438b JQ |
1437 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1438 | addr = *(void **)addr; | |
1439 | } | |
ec245e21 | 1440 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1441 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1442 | } else { |
e61a1e0a | 1443 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1444 | |
1445 | } | |
f752a6aa JQ |
1446 | if (ret < 0) { |
1447 | return ret; | |
1448 | } | |
9ed7d6ae JQ |
1449 | } |
1450 | } | |
1451 | field++; | |
1452 | } | |
811814bd JQ |
1453 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1454 | if (ret != 0) { | |
1455 | return ret; | |
1456 | } | |
752ff2fa | 1457 | if (vmsd->post_load) { |
e59fb374 | 1458 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1459 | } |
9ed7d6ae JQ |
1460 | return 0; |
1461 | } | |
1462 | ||
1463 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1464 | void *opaque) |
9ed7d6ae JQ |
1465 | { |
1466 | VMStateField *field = vmsd->fields; | |
1467 | ||
8fb0791d JQ |
1468 | if (vmsd->pre_save) { |
1469 | vmsd->pre_save(opaque); | |
1470 | } | |
9ed7d6ae | 1471 | while(field->name) { |
f11f6a5f JQ |
1472 | if (!field->field_exists || |
1473 | field->field_exists(opaque, vmsd->version_id)) { | |
1474 | void *base_addr = opaque + field->offset; | |
1475 | int i, n_elems = 1; | |
e61a1e0a | 1476 | int size = field->size; |
dde0463b | 1477 | |
e61a1e0a JQ |
1478 | if (field->flags & VMS_VBUFFER) { |
1479 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1480 | if (field->flags & VMS_MULTIPLY) { |
1481 | size *= field->size; | |
1482 | } | |
e61a1e0a | 1483 | } |
f11f6a5f JQ |
1484 | if (field->flags & VMS_ARRAY) { |
1485 | n_elems = field->num; | |
d6698281 JQ |
1486 | } else if (field->flags & VMS_VARRAY_INT32) { |
1487 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1488 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1489 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1490 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1491 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1492 | } |
1493 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1494 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1495 | } |
1496 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1497 | void *addr = base_addr + size * i; |
ec245e21 | 1498 | |
8595387e JQ |
1499 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1500 | addr = *(void **)addr; | |
1501 | } | |
f11f6a5f JQ |
1502 | if (field->flags & VMS_STRUCT) { |
1503 | vmstate_save_state(f, field->vmsd, addr); | |
1504 | } else { | |
e61a1e0a | 1505 | field->info->put(f, addr, size); |
f11f6a5f | 1506 | } |
ec245e21 | 1507 | } |
dde0463b | 1508 | } |
9ed7d6ae JQ |
1509 | field++; |
1510 | } | |
811814bd | 1511 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1512 | } |
1513 | ||
4082be4d JQ |
1514 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1515 | { | |
9ed7d6ae JQ |
1516 | if (!se->vmsd) { /* Old style */ |
1517 | return se->load_state(f, se->opaque, version_id); | |
1518 | } | |
1519 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1520 | } |
1521 | ||
dc912121 | 1522 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1523 | { |
9ed7d6ae JQ |
1524 | if (!se->vmsd) { /* Old style */ |
1525 | se->save_state(f, se->opaque); | |
dc912121 | 1526 | return; |
9ed7d6ae JQ |
1527 | } |
1528 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1529 | } |
1530 | ||
a672b469 AL |
1531 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1532 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1533 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1534 | ||
1535 | #define QEMU_VM_EOF 0x00 | |
1536 | #define QEMU_VM_SECTION_START 0x01 | |
1537 | #define QEMU_VM_SECTION_PART 0x02 | |
1538 | #define QEMU_VM_SECTION_END 0x03 | |
1539 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1540 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1541 | |
dc912121 AW |
1542 | bool qemu_savevm_state_blocked(Monitor *mon) |
1543 | { | |
1544 | SaveStateEntry *se; | |
1545 | ||
1546 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1547 | if (se->no_migrate) { | |
1548 | monitor_printf(mon, "state blocked by non-migratable device '%s'\n", | |
1549 | se->idstr); | |
1550 | return true; | |
1551 | } | |
1552 | } | |
1553 | return false; | |
1554 | } | |
1555 | ||
f327aa0c JK |
1556 | int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable, |
1557 | int shared) | |
a672b469 AL |
1558 | { |
1559 | SaveStateEntry *se; | |
39346385 | 1560 | int ret; |
a672b469 | 1561 | |
c163b5ca | 1562 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1563 | if(se->set_params == NULL) { | |
1564 | continue; | |
1565 | } | |
1566 | se->set_params(blk_enable, shared, se->opaque); | |
1567 | } | |
1568 | ||
a672b469 AL |
1569 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1570 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1571 | ||
72cf2d4f | 1572 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1573 | int len; |
1574 | ||
1575 | if (se->save_live_state == NULL) | |
1576 | continue; | |
1577 | ||
1578 | /* Section type */ | |
1579 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1580 | qemu_put_be32(f, se->section_id); | |
1581 | ||
1582 | /* ID string */ | |
1583 | len = strlen(se->idstr); | |
1584 | qemu_put_byte(f, len); | |
1585 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1586 | ||
1587 | qemu_put_be32(f, se->instance_id); | |
1588 | qemu_put_be32(f, se->version_id); | |
1589 | ||
2975725f JQ |
1590 | ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque); |
1591 | if (ret < 0) { | |
1592 | qemu_savevm_state_cancel(mon, f); | |
1593 | return ret; | |
1594 | } | |
a672b469 | 1595 | } |
624b9cc2 | 1596 | ret = qemu_file_get_error(f); |
39346385 | 1597 | if (ret != 0) { |
f327aa0c | 1598 | qemu_savevm_state_cancel(mon, f); |
4ec7fcc7 | 1599 | } |
a672b469 | 1600 | |
39346385 JQ |
1601 | return ret; |
1602 | ||
a672b469 AL |
1603 | } |
1604 | ||
39346385 | 1605 | /* |
07f35073 | 1606 | * this function has three return values: |
39346385 JQ |
1607 | * negative: there was one error, and we have -errno. |
1608 | * 0 : We haven't finished, caller have to go again | |
1609 | * 1 : We have finished, we can go to complete phase | |
1610 | */ | |
f327aa0c | 1611 | int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f) |
a672b469 AL |
1612 | { |
1613 | SaveStateEntry *se; | |
1614 | int ret = 1; | |
1615 | ||
72cf2d4f | 1616 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1617 | if (se->save_live_state == NULL) |
1618 | continue; | |
1619 | ||
1620 | /* Section type */ | |
1621 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1622 | qemu_put_be32(f, se->section_id); | |
1623 | ||
90697be8 | 1624 | ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque); |
2975725f | 1625 | if (ret <= 0) { |
90697be8 JK |
1626 | /* Do not proceed to the next vmstate before this one reported |
1627 | completion of the current stage. This serializes the migration | |
1628 | and reduces the probability that a faster changing state is | |
1629 | synchronized over and over again. */ | |
1630 | break; | |
1631 | } | |
a672b469 | 1632 | } |
39346385 JQ |
1633 | if (ret != 0) { |
1634 | return ret; | |
1635 | } | |
624b9cc2 | 1636 | ret = qemu_file_get_error(f); |
39346385 | 1637 | if (ret != 0) { |
f327aa0c | 1638 | qemu_savevm_state_cancel(mon, f); |
4ec7fcc7 | 1639 | } |
39346385 | 1640 | return ret; |
a672b469 AL |
1641 | } |
1642 | ||
f327aa0c | 1643 | int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f) |
a672b469 AL |
1644 | { |
1645 | SaveStateEntry *se; | |
2975725f | 1646 | int ret; |
a672b469 | 1647 | |
ea375f9a JK |
1648 | cpu_synchronize_all_states(); |
1649 | ||
72cf2d4f | 1650 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1651 | if (se->save_live_state == NULL) |
1652 | continue; | |
1653 | ||
1654 | /* Section type */ | |
1655 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1656 | qemu_put_be32(f, se->section_id); | |
1657 | ||
2975725f JQ |
1658 | ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque); |
1659 | if (ret < 0) { | |
1660 | return ret; | |
1661 | } | |
a672b469 AL |
1662 | } |
1663 | ||
72cf2d4f | 1664 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1665 | int len; |
1666 | ||
9ed7d6ae | 1667 | if (se->save_state == NULL && se->vmsd == NULL) |
a672b469 AL |
1668 | continue; |
1669 | ||
1670 | /* Section type */ | |
1671 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1672 | qemu_put_be32(f, se->section_id); | |
1673 | ||
1674 | /* ID string */ | |
1675 | len = strlen(se->idstr); | |
1676 | qemu_put_byte(f, len); | |
1677 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1678 | ||
1679 | qemu_put_be32(f, se->instance_id); | |
1680 | qemu_put_be32(f, se->version_id); | |
1681 | ||
dc912121 | 1682 | vmstate_save(f, se); |
a672b469 AL |
1683 | } |
1684 | ||
1685 | qemu_put_byte(f, QEMU_VM_EOF); | |
1686 | ||
624b9cc2 | 1687 | return qemu_file_get_error(f); |
a672b469 AL |
1688 | } |
1689 | ||
f327aa0c | 1690 | void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f) |
4ec7fcc7 JK |
1691 | { |
1692 | SaveStateEntry *se; | |
1693 | ||
1694 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1695 | if (se->save_live_state) { | |
f327aa0c | 1696 | se->save_live_state(mon, f, -1, se->opaque); |
4ec7fcc7 JK |
1697 | } |
1698 | } | |
1699 | } | |
1700 | ||
f327aa0c | 1701 | static int qemu_savevm_state(Monitor *mon, QEMUFile *f) |
a672b469 | 1702 | { |
a672b469 AL |
1703 | int ret; |
1704 | ||
dc912121 AW |
1705 | if (qemu_savevm_state_blocked(mon)) { |
1706 | ret = -EINVAL; | |
1707 | goto out; | |
1708 | } | |
1709 | ||
f327aa0c | 1710 | ret = qemu_savevm_state_begin(mon, f, 0, 0); |
a672b469 AL |
1711 | if (ret < 0) |
1712 | goto out; | |
1713 | ||
1714 | do { | |
f327aa0c | 1715 | ret = qemu_savevm_state_iterate(mon, f); |
a672b469 AL |
1716 | if (ret < 0) |
1717 | goto out; | |
1718 | } while (ret == 0); | |
1719 | ||
f327aa0c | 1720 | ret = qemu_savevm_state_complete(mon, f); |
a672b469 AL |
1721 | |
1722 | out: | |
39346385 | 1723 | if (ret == 0) { |
624b9cc2 | 1724 | ret = qemu_file_get_error(f); |
39346385 | 1725 | } |
a672b469 | 1726 | |
a672b469 AL |
1727 | return ret; |
1728 | } | |
1729 | ||
1730 | static SaveStateEntry *find_se(const char *idstr, int instance_id) | |
1731 | { | |
1732 | SaveStateEntry *se; | |
1733 | ||
72cf2d4f | 1734 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1735 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1736 | (instance_id == se->instance_id || |
1737 | instance_id == se->alias_id)) | |
a672b469 | 1738 | return se; |
7685ee6a AW |
1739 | /* Migrating from an older version? */ |
1740 | if (strstr(se->idstr, idstr) && se->compat) { | |
1741 | if (!strcmp(se->compat->idstr, idstr) && | |
1742 | (instance_id == se->compat->instance_id || | |
1743 | instance_id == se->alias_id)) | |
1744 | return se; | |
1745 | } | |
a672b469 AL |
1746 | } |
1747 | return NULL; | |
1748 | } | |
1749 | ||
811814bd JQ |
1750 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1751 | { | |
1752 | while(sub && sub->needed) { | |
1753 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1754 | return sub->vmsd; | |
1755 | } | |
1756 | sub++; | |
1757 | } | |
1758 | return NULL; | |
1759 | } | |
1760 | ||
1761 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1762 | void *opaque) | |
1763 | { | |
c6380724 | 1764 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1765 | char idstr[256]; |
1766 | int ret; | |
c6380724 | 1767 | uint8_t version_id, len, size; |
811814bd JQ |
1768 | const VMStateDescription *sub_vmsd; |
1769 | ||
c6380724 JQ |
1770 | len = qemu_peek_byte(f, 1); |
1771 | if (len < strlen(vmsd->name) + 1) { | |
1772 | /* subsection name has be be "section_name/a" */ | |
1773 | return 0; | |
1774 | } | |
1775 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1776 | if (size != len) { | |
1777 | return 0; | |
1778 | } | |
1779 | idstr[size] = 0; | |
811814bd | 1780 | |
c6380724 JQ |
1781 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1782 | /* it don't have a valid subsection name */ | |
1783 | return 0; | |
1784 | } | |
3da9eebd | 1785 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1786 | if (sub_vmsd == NULL) { |
1787 | return -ENOENT; | |
1788 | } | |
c6380724 JQ |
1789 | qemu_file_skip(f, 1); /* subsection */ |
1790 | qemu_file_skip(f, 1); /* len */ | |
1791 | qemu_file_skip(f, len); /* idstr */ | |
1792 | version_id = qemu_get_be32(f); | |
1793 | ||
811814bd JQ |
1794 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1795 | if (ret) { | |
1796 | return ret; | |
1797 | } | |
1798 | } | |
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1803 | void *opaque) | |
1804 | { | |
1805 | const VMStateSubsection *sub = vmsd->subsections; | |
1806 | ||
1807 | while (sub && sub->needed) { | |
1808 | if (sub->needed(opaque)) { | |
1809 | const VMStateDescription *vmsd = sub->vmsd; | |
1810 | uint8_t len; | |
1811 | ||
1812 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1813 | len = strlen(vmsd->name); | |
1814 | qemu_put_byte(f, len); | |
1815 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1816 | qemu_put_be32(f, vmsd->version_id); | |
1817 | vmstate_save_state(f, vmsd, opaque); | |
1818 | } | |
1819 | sub++; | |
1820 | } | |
1821 | } | |
1822 | ||
a672b469 | 1823 | typedef struct LoadStateEntry { |
72cf2d4f | 1824 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1825 | SaveStateEntry *se; |
1826 | int section_id; | |
1827 | int version_id; | |
a672b469 AL |
1828 | } LoadStateEntry; |
1829 | ||
a672b469 AL |
1830 | int qemu_loadvm_state(QEMUFile *f) |
1831 | { | |
72cf2d4f BS |
1832 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1833 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1834 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1835 | uint8_t section_type; |
1836 | unsigned int v; | |
1837 | int ret; | |
1838 | ||
dc912121 AW |
1839 | if (qemu_savevm_state_blocked(default_mon)) { |
1840 | return -EINVAL; | |
1841 | } | |
1842 | ||
a672b469 AL |
1843 | v = qemu_get_be32(f); |
1844 | if (v != QEMU_VM_FILE_MAGIC) | |
1845 | return -EINVAL; | |
1846 | ||
1847 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1848 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1849 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1850 | return -ENOTSUP; | |
1851 | } | |
a672b469 AL |
1852 | if (v != QEMU_VM_FILE_VERSION) |
1853 | return -ENOTSUP; | |
1854 | ||
1855 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1856 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1857 | SaveStateEntry *se; |
1858 | char idstr[257]; | |
1859 | int len; | |
1860 | ||
1861 | switch (section_type) { | |
1862 | case QEMU_VM_SECTION_START: | |
1863 | case QEMU_VM_SECTION_FULL: | |
1864 | /* Read section start */ | |
1865 | section_id = qemu_get_be32(f); | |
1866 | len = qemu_get_byte(f); | |
1867 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1868 | idstr[len] = 0; | |
1869 | instance_id = qemu_get_be32(f); | |
1870 | version_id = qemu_get_be32(f); | |
1871 | ||
1872 | /* Find savevm section */ | |
1873 | se = find_se(idstr, instance_id); | |
1874 | if (se == NULL) { | |
1875 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1876 | ret = -EINVAL; | |
1877 | goto out; | |
1878 | } | |
1879 | ||
1880 | /* Validate version */ | |
1881 | if (version_id > se->version_id) { | |
1882 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1883 | version_id, idstr, se->version_id); | |
1884 | ret = -EINVAL; | |
1885 | goto out; | |
1886 | } | |
1887 | ||
1888 | /* Add entry */ | |
7267c094 | 1889 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1890 | |
1891 | le->se = se; | |
1892 | le->section_id = section_id; | |
1893 | le->version_id = version_id; | |
72cf2d4f | 1894 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1895 | |
4082be4d | 1896 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1897 | if (ret < 0) { |
1898 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1899 | instance_id, idstr); | |
1900 | goto out; | |
1901 | } | |
a672b469 AL |
1902 | break; |
1903 | case QEMU_VM_SECTION_PART: | |
1904 | case QEMU_VM_SECTION_END: | |
1905 | section_id = qemu_get_be32(f); | |
1906 | ||
72cf2d4f | 1907 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1908 | if (le->section_id == section_id) { |
1909 | break; | |
1910 | } | |
1911 | } | |
a672b469 AL |
1912 | if (le == NULL) { |
1913 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1914 | ret = -EINVAL; | |
1915 | goto out; | |
1916 | } | |
1917 | ||
4082be4d | 1918 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1919 | if (ret < 0) { |
1920 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
1921 | section_id); | |
1922 | goto out; | |
1923 | } | |
a672b469 AL |
1924 | break; |
1925 | default: | |
1926 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
1927 | ret = -EINVAL; | |
1928 | goto out; | |
1929 | } | |
1930 | } | |
1931 | ||
ea375f9a JK |
1932 | cpu_synchronize_all_post_init(); |
1933 | ||
a672b469 AL |
1934 | ret = 0; |
1935 | ||
1936 | out: | |
72cf2d4f BS |
1937 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1938 | QLIST_REMOVE(le, entry); | |
7267c094 | 1939 | g_free(le); |
a672b469 AL |
1940 | } |
1941 | ||
42802d47 JQ |
1942 | if (ret == 0) { |
1943 | ret = qemu_file_get_error(f); | |
624b9cc2 | 1944 | } |
a672b469 AL |
1945 | |
1946 | return ret; | |
1947 | } | |
1948 | ||
a672b469 AL |
1949 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1950 | const char *name) | |
1951 | { | |
1952 | QEMUSnapshotInfo *sn_tab, *sn; | |
1953 | int nb_sns, i, ret; | |
1954 | ||
1955 | ret = -ENOENT; | |
1956 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
1957 | if (nb_sns < 0) | |
1958 | return ret; | |
1959 | for(i = 0; i < nb_sns; i++) { | |
1960 | sn = &sn_tab[i]; | |
1961 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
1962 | *sn_info = *sn; | |
1963 | ret = 0; | |
1964 | break; | |
1965 | } | |
1966 | } | |
7267c094 | 1967 | g_free(sn_tab); |
a672b469 AL |
1968 | return ret; |
1969 | } | |
1970 | ||
cb499fb2 KW |
1971 | /* |
1972 | * Deletes snapshots of a given name in all opened images. | |
1973 | */ | |
1974 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
1975 | { | |
1976 | BlockDriverState *bs; | |
cb499fb2 KW |
1977 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
1978 | int ret; | |
1979 | ||
dbc13590 MA |
1980 | bs = NULL; |
1981 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
1982 | if (bdrv_can_snapshot(bs) && |
1983 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
1984 | { | |
1985 | ret = bdrv_snapshot_delete(bs, name); | |
1986 | if (ret < 0) { | |
1987 | monitor_printf(mon, | |
1988 | "Error while deleting snapshot on '%s'\n", | |
1989 | bdrv_get_device_name(bs)); | |
1990 | return -1; | |
1991 | } | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | return 0; | |
1996 | } | |
1997 | ||
d54908a5 | 1998 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
1999 | { |
2000 | BlockDriverState *bs, *bs1; | |
2001 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2002 | int ret; |
a672b469 AL |
2003 | QEMUFile *f; |
2004 | int saved_vm_running; | |
2d22b18f | 2005 | uint32_t vm_state_size; |
a672b469 AL |
2006 | #ifdef _WIN32 |
2007 | struct _timeb tb; | |
7d631a11 | 2008 | struct tm *ptm; |
a672b469 AL |
2009 | #else |
2010 | struct timeval tv; | |
7d631a11 | 2011 | struct tm tm; |
a672b469 | 2012 | #endif |
d54908a5 | 2013 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2014 | |
feeee5ac | 2015 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2016 | bs = NULL; |
2017 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2018 | |
07b70bfb | 2019 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2020 | continue; |
2021 | } | |
2022 | ||
2023 | if (!bdrv_can_snapshot(bs)) { | |
2024 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2025 | bdrv_get_device_name(bs)); | |
2026 | return; | |
2027 | } | |
2028 | } | |
2029 | ||
f9092b10 | 2030 | bs = bdrv_snapshots(); |
a672b469 | 2031 | if (!bs) { |
376253ec | 2032 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2033 | return; |
2034 | } | |
a672b469 | 2035 | |
1354869c | 2036 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2037 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2038 | |
cb499fb2 | 2039 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2040 | |
2041 | /* fill auxiliary fields */ | |
2042 | #ifdef _WIN32 | |
2043 | _ftime(&tb); | |
2044 | sn->date_sec = tb.time; | |
2045 | sn->date_nsec = tb.millitm * 1000000; | |
2046 | #else | |
2047 | gettimeofday(&tv, NULL); | |
2048 | sn->date_sec = tv.tv_sec; | |
2049 | sn->date_nsec = tv.tv_usec * 1000; | |
2050 | #endif | |
74475455 | 2051 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2052 | |
7d631a11 MDCF |
2053 | if (name) { |
2054 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2055 | if (ret >= 0) { | |
2056 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2057 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2058 | } else { | |
2059 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2060 | } | |
2061 | } else { | |
2062 | #ifdef _WIN32 | |
2063 | ptm = localtime(&tb.time); | |
2064 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); | |
2065 | #else | |
d7d9b528 BS |
2066 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2067 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2068 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2069 | #endif | |
2070 | } | |
2071 | ||
cb499fb2 | 2072 | /* Delete old snapshots of the same name */ |
f139a412 | 2073 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2074 | goto the_end; |
2075 | } | |
2076 | ||
a672b469 | 2077 | /* save the VM state */ |
45566e9c | 2078 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2079 | if (!f) { |
376253ec | 2080 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2081 | goto the_end; |
2082 | } | |
f327aa0c | 2083 | ret = qemu_savevm_state(mon, f); |
2d22b18f | 2084 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2085 | qemu_fclose(f); |
2086 | if (ret < 0) { | |
376253ec | 2087 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2088 | goto the_end; |
2089 | } | |
2090 | ||
2091 | /* create the snapshots */ | |
2092 | ||
dbc13590 MA |
2093 | bs1 = NULL; |
2094 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2095 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2096 | /* Write VM state size only to the image that contains the state */ |
2097 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2098 | ret = bdrv_snapshot_create(bs1, sn); |
2099 | if (ret < 0) { | |
376253ec AL |
2100 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2101 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2102 | } |
2103 | } | |
2104 | } | |
2105 | ||
2106 | the_end: | |
2107 | if (saved_vm_running) | |
2108 | vm_start(); | |
2109 | } | |
2110 | ||
03cd4655 | 2111 | int load_vmstate(const char *name) |
a672b469 | 2112 | { |
f0aa7a8b | 2113 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2114 | QEMUSnapshotInfo sn; |
a672b469 | 2115 | QEMUFile *f; |
751c6a17 | 2116 | int ret; |
a672b469 | 2117 | |
f0aa7a8b MDCF |
2118 | bs_vm_state = bdrv_snapshots(); |
2119 | if (!bs_vm_state) { | |
2120 | error_report("No block device supports snapshots"); | |
2121 | return -ENOTSUP; | |
2122 | } | |
2123 | ||
2124 | /* Don't even try to load empty VM states */ | |
2125 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2126 | if (ret < 0) { | |
2127 | return ret; | |
2128 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2129 | error_report("This is a disk-only snapshot. Revert to it offline " |
2130 | "using qemu-img."); | |
f0aa7a8b MDCF |
2131 | return -EINVAL; |
2132 | } | |
2133 | ||
2134 | /* Verify if there is any device that doesn't support snapshots and is | |
2135 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2136 | bs = NULL; |
2137 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2138 | |
07b70bfb | 2139 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2140 | continue; |
2141 | } | |
2142 | ||
2143 | if (!bdrv_can_snapshot(bs)) { | |
2144 | error_report("Device '%s' is writable but does not support snapshots.", | |
2145 | bdrv_get_device_name(bs)); | |
2146 | return -ENOTSUP; | |
2147 | } | |
feeee5ac | 2148 | |
f0aa7a8b MDCF |
2149 | ret = bdrv_snapshot_find(bs, &sn, name); |
2150 | if (ret < 0) { | |
2151 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2152 | bdrv_get_device_name(bs), name); | |
2153 | return ret; | |
2154 | } | |
a672b469 AL |
2155 | } |
2156 | ||
2157 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2158 | bdrv_drain_all(); |
a672b469 | 2159 | |
f0aa7a8b MDCF |
2160 | bs = NULL; |
2161 | while ((bs = bdrv_next(bs))) { | |
2162 | if (bdrv_can_snapshot(bs)) { | |
2163 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2164 | if (ret < 0) { |
f0aa7a8b MDCF |
2165 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2166 | ret, name, bdrv_get_device_name(bs)); | |
2167 | return ret; | |
a672b469 AL |
2168 | } |
2169 | } | |
2170 | } | |
2171 | ||
a672b469 | 2172 | /* restore the VM state */ |
f0aa7a8b | 2173 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2174 | if (!f) { |
1ecda02b | 2175 | error_report("Could not open VM state file"); |
05f2401e | 2176 | return -EINVAL; |
a672b469 | 2177 | } |
f0aa7a8b | 2178 | |
5a8a49d7 | 2179 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2180 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2181 | |
a672b469 AL |
2182 | qemu_fclose(f); |
2183 | if (ret < 0) { | |
1ecda02b | 2184 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2185 | return ret; |
a672b469 | 2186 | } |
f0aa7a8b | 2187 | |
05f2401e | 2188 | return 0; |
7b630349 JQ |
2189 | } |
2190 | ||
d54908a5 | 2191 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2192 | { |
2193 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2194 | int ret; |
d54908a5 | 2195 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2196 | |
f9092b10 | 2197 | bs = bdrv_snapshots(); |
a672b469 | 2198 | if (!bs) { |
376253ec | 2199 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2200 | return; |
2201 | } | |
2202 | ||
dbc13590 MA |
2203 | bs1 = NULL; |
2204 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2205 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2206 | ret = bdrv_snapshot_delete(bs1, name); |
2207 | if (ret < 0) { | |
2208 | if (ret == -ENOTSUP) | |
376253ec AL |
2209 | monitor_printf(mon, |
2210 | "Snapshots not supported on device '%s'\n", | |
2211 | bdrv_get_device_name(bs1)); | |
a672b469 | 2212 | else |
376253ec AL |
2213 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2214 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2215 | } |
2216 | } | |
2217 | } | |
2218 | } | |
2219 | ||
376253ec | 2220 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2221 | { |
2222 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2223 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2224 | int nb_sns, i, ret, available; | |
2225 | int total; | |
2226 | int *available_snapshots; | |
a672b469 AL |
2227 | char buf[256]; |
2228 | ||
f9092b10 | 2229 | bs = bdrv_snapshots(); |
a672b469 | 2230 | if (!bs) { |
376253ec | 2231 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2232 | return; |
2233 | } | |
a672b469 AL |
2234 | |
2235 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2236 | if (nb_sns < 0) { | |
376253ec | 2237 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2238 | return; |
2239 | } | |
f9209915 MDCF |
2240 | |
2241 | if (nb_sns == 0) { | |
2242 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2243 | return; | |
2244 | } | |
2245 | ||
7267c094 | 2246 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2247 | total = 0; |
2248 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2249 | sn = &sn_tab[i]; |
f9209915 MDCF |
2250 | available = 1; |
2251 | bs1 = NULL; | |
2252 | ||
2253 | while ((bs1 = bdrv_next(bs1))) { | |
2254 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2255 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2256 | if (ret < 0) { | |
2257 | available = 0; | |
2258 | break; | |
2259 | } | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | if (available) { | |
2264 | available_snapshots[total] = i; | |
2265 | total++; | |
2266 | } | |
a672b469 | 2267 | } |
f9209915 MDCF |
2268 | |
2269 | if (total > 0) { | |
2270 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2271 | for (i = 0; i < total; i++) { | |
2272 | sn = &sn_tab[available_snapshots[i]]; | |
2273 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2274 | } | |
2275 | } else { | |
2276 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2277 | } | |
2278 | ||
7267c094 AL |
2279 | g_free(sn_tab); |
2280 | g_free(available_snapshots); | |
f9209915 | 2281 | |
a672b469 | 2282 | } |