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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" |
c5705a77 | 86 | #include "memory.h" |
a7ae8355 | 87 | #include "qmp-commands.h" |
517a13c9 | 88 | #include "trace.h" |
08e99e29 | 89 | #include "bitops.h" |
511d2b14 | 90 | |
a672b469 | 91 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 92 | |
18995b98 | 93 | #ifndef ETH_P_RARP |
f8778a77 | 94 | #define ETH_P_RARP 0x8035 |
18995b98 N |
95 | #endif |
96 | #define ARP_HTYPE_ETH 0x0001 | |
97 | #define ARP_PTYPE_IP 0x0800 | |
98 | #define ARP_OP_REQUEST_REV 0x3 | |
99 | ||
100 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
101 | uint8_t *mac_addr) |
102 | { | |
18995b98 N |
103 | /* Ethernet header. */ |
104 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
105 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
106 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
107 | ||
108 | /* RARP header. */ | |
109 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
110 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
111 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
112 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
113 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
114 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
115 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
116 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
117 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
118 | ||
119 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
120 | memset(buf + 42, 0x00, 18); | |
121 | ||
122 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
123 | } |
124 | ||
f401ca22 | 125 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 126 | { |
18995b98 | 127 | uint8_t buf[60]; |
f401ca22 MM |
128 | int len; |
129 | ||
130 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
131 | ||
132 | qemu_send_packet_raw(&nic->nc, buf, len); | |
133 | } | |
134 | ||
135 | ||
136 | static void qemu_announce_self_once(void *opaque) | |
137 | { | |
ed8b330b GN |
138 | static int count = SELF_ANNOUNCE_ROUNDS; |
139 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 140 | |
f401ca22 MM |
141 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
142 | ||
18995b98 N |
143 | if (--count) { |
144 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 145 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 146 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
147 | } else { |
148 | qemu_del_timer(timer); | |
149 | qemu_free_timer(timer); | |
150 | } | |
151 | } | |
152 | ||
153 | void qemu_announce_self(void) | |
154 | { | |
155 | static QEMUTimer *timer; | |
7bd427d8 | 156 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 157 | qemu_announce_self_once(&timer); |
a672b469 AL |
158 | } |
159 | ||
160 | /***********************************************************/ | |
161 | /* savevm/loadvm support */ | |
162 | ||
163 | #define IO_BUF_SIZE 32768 | |
164 | ||
165 | struct QEMUFile { | |
166 | QEMUFilePutBufferFunc *put_buffer; | |
167 | QEMUFileGetBufferFunc *get_buffer; | |
168 | QEMUFileCloseFunc *close; | |
169 | QEMUFileRateLimit *rate_limit; | |
19629537 | 170 | QEMUFileSetRateLimit *set_rate_limit; |
c163b5ca | 171 | QEMUFileGetRateLimit *get_rate_limit; |
a672b469 AL |
172 | void *opaque; |
173 | int is_write; | |
174 | ||
175 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
176 | when reading */ | |
177 | int buf_index; | |
178 | int buf_size; /* 0 when writing */ | |
179 | uint8_t buf[IO_BUF_SIZE]; | |
180 | ||
3961b4dd | 181 | int last_error; |
a672b469 AL |
182 | }; |
183 | ||
7f79dd28 | 184 | typedef struct QEMUFileStdio |
a672b469 | 185 | { |
7f79dd28 | 186 | FILE *stdio_file; |
a672b469 | 187 | QEMUFile *file; |
7f79dd28 | 188 | } QEMUFileStdio; |
a672b469 AL |
189 | |
190 | typedef struct QEMUFileSocket | |
191 | { | |
192 | int fd; | |
193 | QEMUFile *file; | |
194 | } QEMUFileSocket; | |
195 | ||
196 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
197 | { | |
198 | QEMUFileSocket *s = opaque; | |
199 | ssize_t len; | |
200 | ||
201 | do { | |
00aa0040 | 202 | len = qemu_recv(s->fd, buf, size, 0); |
a672b469 AL |
203 | } while (len == -1 && socket_error() == EINTR); |
204 | ||
205 | if (len == -1) | |
206 | len = -socket_error(); | |
207 | ||
208 | return len; | |
209 | } | |
210 | ||
211 | static int socket_close(void *opaque) | |
212 | { | |
213 | QEMUFileSocket *s = opaque; | |
7267c094 | 214 | g_free(s); |
a672b469 AL |
215 | return 0; |
216 | } | |
217 | ||
7f79dd28 | 218 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 219 | { |
7f79dd28 PB |
220 | QEMUFileStdio *s = opaque; |
221 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
222 | } |
223 | ||
7f79dd28 | 224 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 225 | { |
7f79dd28 PB |
226 | QEMUFileStdio *s = opaque; |
227 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
228 | int bytes; |
229 | ||
230 | do { | |
231 | clearerr(fp); | |
232 | bytes = fread(buf, 1, size, fp); | |
233 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); | |
234 | return bytes; | |
a672b469 AL |
235 | } |
236 | ||
7f79dd28 PB |
237 | static int stdio_pclose(void *opaque) |
238 | { | |
239 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
240 | int ret; |
241 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
242 | if (ret == -1) { |
243 | ret = -errno; | |
244 | } | |
7267c094 | 245 | g_free(s); |
41ef56e6 | 246 | return ret; |
7f79dd28 PB |
247 | } |
248 | ||
249 | static int stdio_fclose(void *opaque) | |
a672b469 | 250 | { |
7f79dd28 | 251 | QEMUFileStdio *s = opaque; |
0e286705 EH |
252 | int ret = 0; |
253 | if (fclose(s->stdio_file) == EOF) { | |
254 | ret = -errno; | |
255 | } | |
7267c094 | 256 | g_free(s); |
0e286705 | 257 | return ret; |
a672b469 AL |
258 | } |
259 | ||
7f79dd28 | 260 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 261 | { |
7f79dd28 | 262 | QEMUFileStdio *s; |
a672b469 | 263 | |
7f79dd28 | 264 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
265 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
266 | return NULL; | |
267 | } | |
268 | ||
7267c094 | 269 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 270 | |
7f79dd28 | 271 | s->stdio_file = stdio_file; |
a672b469 AL |
272 | |
273 | if(mode[0] == 'r') { | |
c163b5ca | 274 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, |
275 | NULL, NULL, NULL); | |
a672b469 | 276 | } else { |
c163b5ca | 277 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, |
278 | NULL, NULL, NULL); | |
a672b469 | 279 | } |
a672b469 AL |
280 | return s->file; |
281 | } | |
282 | ||
283 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
284 | { | |
285 | FILE *popen_file; | |
286 | ||
287 | popen_file = popen(command, mode); | |
288 | if(popen_file == NULL) { | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | return qemu_popen(popen_file, mode); | |
293 | } | |
294 | ||
7f79dd28 | 295 | int qemu_stdio_fd(QEMUFile *f) |
8a43b1ea | 296 | { |
7f79dd28 | 297 | QEMUFileStdio *p; |
8a43b1ea CL |
298 | int fd; |
299 | ||
7f79dd28 PB |
300 | p = (QEMUFileStdio *)f->opaque; |
301 | fd = fileno(p->stdio_file); | |
8a43b1ea CL |
302 | |
303 | return fd; | |
304 | } | |
305 | ||
5ac1fad3 PB |
306 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
307 | { | |
308 | QEMUFileStdio *s; | |
309 | ||
310 | if (mode == NULL || | |
311 | (mode[0] != 'r' && mode[0] != 'w') || | |
312 | mode[1] != 'b' || mode[2] != 0) { | |
313 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
314 | return NULL; | |
315 | } | |
316 | ||
7267c094 | 317 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
318 | s->stdio_file = fdopen(fd, mode); |
319 | if (!s->stdio_file) | |
320 | goto fail; | |
321 | ||
322 | if(mode[0] == 'r') { | |
c163b5ca | 323 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, |
324 | NULL, NULL, NULL); | |
5ac1fad3 | 325 | } else { |
c163b5ca | 326 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, |
327 | NULL, NULL, NULL); | |
5ac1fad3 PB |
328 | } |
329 | return s->file; | |
330 | ||
331 | fail: | |
7267c094 | 332 | g_free(s); |
5ac1fad3 PB |
333 | return NULL; |
334 | } | |
335 | ||
a672b469 AL |
336 | QEMUFile *qemu_fopen_socket(int fd) |
337 | { | |
7267c094 | 338 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 339 | |
a672b469 | 340 | s->fd = fd; |
c163b5ca | 341 | s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, |
342 | NULL, NULL, NULL); | |
a672b469 AL |
343 | return s->file; |
344 | } | |
345 | ||
a672b469 AL |
346 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
347 | int64_t pos, int size) | |
348 | { | |
349 | QEMUFileStdio *s = opaque; | |
7f79dd28 | 350 | fseek(s->stdio_file, pos, SEEK_SET); |
5fdb3aa1 | 351 | return fwrite(buf, 1, size, s->stdio_file); |
a672b469 AL |
352 | } |
353 | ||
354 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
355 | { | |
356 | QEMUFileStdio *s = opaque; | |
7f79dd28 PB |
357 | fseek(s->stdio_file, pos, SEEK_SET); |
358 | return fread(buf, 1, size, s->stdio_file); | |
a672b469 AL |
359 | } |
360 | ||
361 | QEMUFile *qemu_fopen(const char *filename, const char *mode) | |
362 | { | |
363 | QEMUFileStdio *s; | |
364 | ||
7f79dd28 PB |
365 | if (mode == NULL || |
366 | (mode[0] != 'r' && mode[0] != 'w') || | |
367 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 368 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
369 | return NULL; |
370 | } | |
371 | ||
7267c094 | 372 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 373 | |
7f79dd28 PB |
374 | s->stdio_file = fopen(filename, mode); |
375 | if (!s->stdio_file) | |
a672b469 | 376 | goto fail; |
c163b5ca | 377 | |
7f79dd28 | 378 | if(mode[0] == 'w') { |
c163b5ca | 379 | s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, |
380 | NULL, NULL, NULL); | |
7f79dd28 | 381 | } else { |
c163b5ca | 382 | s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, |
383 | NULL, NULL, NULL); | |
7f79dd28 PB |
384 | } |
385 | return s->file; | |
a672b469 | 386 | fail: |
7267c094 | 387 | g_free(s); |
a672b469 AL |
388 | return NULL; |
389 | } | |
390 | ||
178e08a5 | 391 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
392 | int64_t pos, int size) |
393 | { | |
45566e9c | 394 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
395 | return size; |
396 | } | |
397 | ||
178e08a5 | 398 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 399 | { |
45566e9c | 400 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
401 | } |
402 | ||
403 | static int bdrv_fclose(void *opaque) | |
404 | { | |
ad492c92 | 405 | return bdrv_flush(opaque); |
a672b469 AL |
406 | } |
407 | ||
45566e9c | 408 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 409 | { |
a672b469 | 410 | if (is_writable) |
c163b5ca | 411 | return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
412 | NULL, NULL, NULL); | |
413 | return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); | |
a672b469 AL |
414 | } |
415 | ||
416 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, | |
417 | QEMUFileGetBufferFunc *get_buffer, | |
418 | QEMUFileCloseFunc *close, | |
19629537 | 419 | QEMUFileRateLimit *rate_limit, |
c163b5ca | 420 | QEMUFileSetRateLimit *set_rate_limit, |
421 | QEMUFileGetRateLimit *get_rate_limit) | |
a672b469 AL |
422 | { |
423 | QEMUFile *f; | |
424 | ||
7267c094 | 425 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
426 | |
427 | f->opaque = opaque; | |
428 | f->put_buffer = put_buffer; | |
429 | f->get_buffer = get_buffer; | |
430 | f->close = close; | |
431 | f->rate_limit = rate_limit; | |
19629537 | 432 | f->set_rate_limit = set_rate_limit; |
c163b5ca | 433 | f->get_rate_limit = get_rate_limit; |
a672b469 AL |
434 | f->is_write = 0; |
435 | ||
436 | return f; | |
437 | } | |
438 | ||
624b9cc2 | 439 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 440 | { |
3961b4dd | 441 | return f->last_error; |
a672b469 AL |
442 | } |
443 | ||
6f121ff5 | 444 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 445 | { |
3961b4dd | 446 | f->last_error = ret; |
4dabe248 AL |
447 | } |
448 | ||
d82ca915 EH |
449 | /** Flushes QEMUFile buffer |
450 | * | |
d82ca915 | 451 | */ |
7311bea3 | 452 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 453 | { |
7311bea3 JQ |
454 | int ret = 0; |
455 | ||
a672b469 | 456 | if (!f->put_buffer) |
7311bea3 | 457 | return 0; |
a672b469 AL |
458 | |
459 | if (f->is_write && f->buf_index > 0) { | |
7311bea3 JQ |
460 | ret = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
461 | if (ret >= 0) { | |
a672b469 | 462 | f->buf_offset += f->buf_index; |
7311bea3 | 463 | } |
a672b469 AL |
464 | f->buf_index = 0; |
465 | } | |
7311bea3 | 466 | return ret; |
a672b469 AL |
467 | } |
468 | ||
469 | static void qemu_fill_buffer(QEMUFile *f) | |
470 | { | |
471 | int len; | |
0046c45b | 472 | int pending; |
a672b469 AL |
473 | |
474 | if (!f->get_buffer) | |
475 | return; | |
476 | ||
477 | if (f->is_write) | |
478 | abort(); | |
479 | ||
0046c45b JQ |
480 | pending = f->buf_size - f->buf_index; |
481 | if (pending > 0) { | |
482 | memmove(f->buf, f->buf + f->buf_index, pending); | |
483 | } | |
484 | f->buf_index = 0; | |
485 | f->buf_size = pending; | |
486 | ||
487 | len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, | |
488 | IO_BUF_SIZE - pending); | |
a672b469 | 489 | if (len > 0) { |
0046c45b | 490 | f->buf_size += len; |
a672b469 | 491 | f->buf_offset += len; |
fa39a30f | 492 | } else if (len == 0) { |
02c4a051 | 493 | qemu_file_set_error(f, -EIO); |
a672b469 | 494 | } else if (len != -EAGAIN) |
c29110d5 | 495 | qemu_file_set_error(f, len); |
a672b469 AL |
496 | } |
497 | ||
d82ca915 EH |
498 | /** Closes the file |
499 | * | |
500 | * Returns negative error value if any error happened on previous operations or | |
501 | * while closing the file. Returns 0 or positive number on success. | |
502 | * | |
503 | * The meaning of return value on success depends on the specific backend | |
504 | * being used. | |
505 | */ | |
506 | int qemu_fclose(QEMUFile *f) | |
507 | { | |
29eee86f | 508 | int ret; |
7311bea3 | 509 | ret = qemu_fflush(f); |
7311bea3 | 510 | |
29eee86f JQ |
511 | if (f->close) { |
512 | int ret2 = f->close(f->opaque); | |
513 | if (ret >= 0) { | |
514 | ret = ret2; | |
515 | } | |
7311bea3 | 516 | } |
d82ca915 EH |
517 | /* If any error was spotted before closing, we should report it |
518 | * instead of the close() return value. | |
519 | */ | |
520 | if (f->last_error) { | |
521 | ret = f->last_error; | |
522 | } | |
7267c094 | 523 | g_free(f); |
a672b469 AL |
524 | return ret; |
525 | } | |
526 | ||
a2b41351 | 527 | int qemu_file_put_notify(QEMUFile *f) |
a672b469 | 528 | { |
a2b41351 | 529 | return f->put_buffer(f->opaque, NULL, 0, 0); |
a672b469 AL |
530 | } |
531 | ||
532 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
533 | { | |
534 | int l; | |
535 | ||
c10682cb JQ |
536 | if (f->last_error) { |
537 | return; | |
538 | } | |
539 | ||
540 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
541 | fprintf(stderr, |
542 | "Attempted to write to buffer while read buffer is not empty\n"); | |
543 | abort(); | |
544 | } | |
545 | ||
c10682cb | 546 | while (size > 0) { |
a672b469 AL |
547 | l = IO_BUF_SIZE - f->buf_index; |
548 | if (l > size) | |
549 | l = size; | |
550 | memcpy(f->buf + f->buf_index, buf, l); | |
551 | f->is_write = 1; | |
552 | f->buf_index += l; | |
553 | buf += l; | |
554 | size -= l; | |
7311bea3 JQ |
555 | if (f->buf_index >= IO_BUF_SIZE) { |
556 | int ret = qemu_fflush(f); | |
c10682cb JQ |
557 | if (ret < 0) { |
558 | qemu_file_set_error(f, ret); | |
559 | break; | |
560 | } | |
7311bea3 | 561 | } |
a672b469 AL |
562 | } |
563 | } | |
564 | ||
565 | void qemu_put_byte(QEMUFile *f, int v) | |
566 | { | |
c10682cb JQ |
567 | if (f->last_error) { |
568 | return; | |
569 | } | |
570 | ||
571 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
572 | fprintf(stderr, |
573 | "Attempted to write to buffer while read buffer is not empty\n"); | |
574 | abort(); | |
575 | } | |
576 | ||
577 | f->buf[f->buf_index++] = v; | |
578 | f->is_write = 1; | |
7311bea3 JQ |
579 | if (f->buf_index >= IO_BUF_SIZE) { |
580 | int ret = qemu_fflush(f); | |
c10682cb JQ |
581 | if (ret < 0) { |
582 | qemu_file_set_error(f, ret); | |
583 | } | |
7311bea3 | 584 | } |
a672b469 AL |
585 | } |
586 | ||
c6380724 | 587 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 588 | { |
c6380724 JQ |
589 | if (f->buf_index + size <= f->buf_size) { |
590 | f->buf_index += size; | |
591 | } | |
592 | } | |
593 | ||
594 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 595 | { |
c6380724 JQ |
596 | int pending; |
597 | int index; | |
a672b469 | 598 | |
b9ce1454 | 599 | if (f->is_write) { |
a672b469 | 600 | abort(); |
b9ce1454 | 601 | } |
a672b469 | 602 | |
c6380724 JQ |
603 | index = f->buf_index + offset; |
604 | pending = f->buf_size - index; | |
605 | if (pending < size) { | |
606 | qemu_fill_buffer(f); | |
607 | index = f->buf_index + offset; | |
608 | pending = f->buf_size - index; | |
609 | } | |
610 | ||
611 | if (pending <= 0) { | |
612 | return 0; | |
613 | } | |
614 | if (size > pending) { | |
615 | size = pending; | |
616 | } | |
617 | ||
618 | memcpy(buf, f->buf + index, size); | |
619 | return size; | |
620 | } | |
621 | ||
622 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
623 | { | |
624 | int pending = size; | |
625 | int done = 0; | |
626 | ||
627 | while (pending > 0) { | |
628 | int res; | |
629 | ||
630 | res = qemu_peek_buffer(f, buf, pending, 0); | |
631 | if (res == 0) { | |
632 | return done; | |
a672b469 | 633 | } |
c6380724 JQ |
634 | qemu_file_skip(f, res); |
635 | buf += res; | |
636 | pending -= res; | |
637 | done += res; | |
a672b469 | 638 | } |
c6380724 | 639 | return done; |
a672b469 AL |
640 | } |
641 | ||
c6380724 | 642 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 643 | { |
c6380724 JQ |
644 | int index = f->buf_index + offset; |
645 | ||
b9ce1454 | 646 | if (f->is_write) { |
811814bd | 647 | abort(); |
b9ce1454 | 648 | } |
811814bd | 649 | |
c6380724 | 650 | if (index >= f->buf_size) { |
811814bd | 651 | qemu_fill_buffer(f); |
c6380724 JQ |
652 | index = f->buf_index + offset; |
653 | if (index >= f->buf_size) { | |
811814bd | 654 | return 0; |
b9ce1454 | 655 | } |
811814bd | 656 | } |
c6380724 | 657 | return f->buf[index]; |
811814bd JQ |
658 | } |
659 | ||
a672b469 AL |
660 | int qemu_get_byte(QEMUFile *f) |
661 | { | |
65f3bb3d | 662 | int result; |
a672b469 | 663 | |
c6380724 JQ |
664 | result = qemu_peek_byte(f, 0); |
665 | qemu_file_skip(f, 1); | |
65f3bb3d | 666 | return result; |
a672b469 AL |
667 | } |
668 | ||
3aee4be1 | 669 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
670 | { |
671 | return f->buf_offset - f->buf_size + f->buf_index; | |
672 | } | |
673 | ||
a672b469 AL |
674 | int qemu_file_rate_limit(QEMUFile *f) |
675 | { | |
676 | if (f->rate_limit) | |
677 | return f->rate_limit(f->opaque); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
3d002df3 | 682 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 683 | { |
684 | if (f->get_rate_limit) | |
685 | return f->get_rate_limit(f->opaque); | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
3d002df3 | 690 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 691 | { |
0bb05eaf GC |
692 | /* any failed or completed migration keeps its state to allow probing of |
693 | * migration data, but has no associated file anymore */ | |
694 | if (f && f->set_rate_limit) | |
19629537 GC |
695 | return f->set_rate_limit(f->opaque, new_rate); |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
a672b469 AL |
700 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
701 | { | |
702 | qemu_put_byte(f, v >> 8); | |
703 | qemu_put_byte(f, v); | |
704 | } | |
705 | ||
706 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
707 | { | |
708 | qemu_put_byte(f, v >> 24); | |
709 | qemu_put_byte(f, v >> 16); | |
710 | qemu_put_byte(f, v >> 8); | |
711 | qemu_put_byte(f, v); | |
712 | } | |
713 | ||
714 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
715 | { | |
716 | qemu_put_be32(f, v >> 32); | |
717 | qemu_put_be32(f, v); | |
718 | } | |
719 | ||
720 | unsigned int qemu_get_be16(QEMUFile *f) | |
721 | { | |
722 | unsigned int v; | |
723 | v = qemu_get_byte(f) << 8; | |
724 | v |= qemu_get_byte(f); | |
725 | return v; | |
726 | } | |
727 | ||
728 | unsigned int qemu_get_be32(QEMUFile *f) | |
729 | { | |
730 | unsigned int v; | |
731 | v = qemu_get_byte(f) << 24; | |
732 | v |= qemu_get_byte(f) << 16; | |
733 | v |= qemu_get_byte(f) << 8; | |
734 | v |= qemu_get_byte(f); | |
735 | return v; | |
736 | } | |
737 | ||
738 | uint64_t qemu_get_be64(QEMUFile *f) | |
739 | { | |
740 | uint64_t v; | |
741 | v = (uint64_t)qemu_get_be32(f) << 32; | |
742 | v |= qemu_get_be32(f); | |
743 | return v; | |
744 | } | |
745 | ||
2ff68d07 PB |
746 | |
747 | /* timer */ | |
748 | ||
749 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
750 | { | |
751 | uint64_t expire_time; | |
752 | ||
753 | expire_time = qemu_timer_expire_time_ns(ts); | |
754 | qemu_put_be64(f, expire_time); | |
755 | } | |
756 | ||
757 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
758 | { | |
759 | uint64_t expire_time; | |
760 | ||
761 | expire_time = qemu_get_be64(f); | |
762 | if (expire_time != -1) { | |
763 | qemu_mod_timer_ns(ts, expire_time); | |
764 | } else { | |
765 | qemu_del_timer(ts); | |
766 | } | |
767 | } | |
768 | ||
769 | ||
cdae5cfb GH |
770 | /* bool */ |
771 | ||
772 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
773 | { | |
774 | bool *v = pv; | |
775 | *v = qemu_get_byte(f); | |
776 | return 0; | |
777 | } | |
778 | ||
779 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
780 | { | |
781 | bool *v = pv; | |
782 | qemu_put_byte(f, *v); | |
783 | } | |
784 | ||
785 | const VMStateInfo vmstate_info_bool = { | |
786 | .name = "bool", | |
787 | .get = get_bool, | |
788 | .put = put_bool, | |
789 | }; | |
790 | ||
9ed7d6ae JQ |
791 | /* 8 bit int */ |
792 | ||
793 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
794 | { | |
795 | int8_t *v = pv; | |
796 | qemu_get_s8s(f, v); | |
797 | return 0; | |
798 | } | |
799 | ||
84e2e3eb | 800 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 801 | { |
84e2e3eb | 802 | int8_t *v = pv; |
9ed7d6ae JQ |
803 | qemu_put_s8s(f, v); |
804 | } | |
805 | ||
806 | const VMStateInfo vmstate_info_int8 = { | |
807 | .name = "int8", | |
808 | .get = get_int8, | |
809 | .put = put_int8, | |
810 | }; | |
811 | ||
812 | /* 16 bit int */ | |
813 | ||
814 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
815 | { | |
816 | int16_t *v = pv; | |
817 | qemu_get_sbe16s(f, v); | |
818 | return 0; | |
819 | } | |
820 | ||
84e2e3eb | 821 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 822 | { |
84e2e3eb | 823 | int16_t *v = pv; |
9ed7d6ae JQ |
824 | qemu_put_sbe16s(f, v); |
825 | } | |
826 | ||
827 | const VMStateInfo vmstate_info_int16 = { | |
828 | .name = "int16", | |
829 | .get = get_int16, | |
830 | .put = put_int16, | |
831 | }; | |
832 | ||
833 | /* 32 bit int */ | |
834 | ||
835 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
836 | { | |
837 | int32_t *v = pv; | |
838 | qemu_get_sbe32s(f, v); | |
839 | return 0; | |
840 | } | |
841 | ||
84e2e3eb | 842 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 843 | { |
84e2e3eb | 844 | int32_t *v = pv; |
9ed7d6ae JQ |
845 | qemu_put_sbe32s(f, v); |
846 | } | |
847 | ||
848 | const VMStateInfo vmstate_info_int32 = { | |
849 | .name = "int32", | |
850 | .get = get_int32, | |
851 | .put = put_int32, | |
852 | }; | |
853 | ||
82501660 JQ |
854 | /* 32 bit int. See that the received value is the same than the one |
855 | in the field */ | |
856 | ||
857 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
858 | { | |
859 | int32_t *v = pv; | |
860 | int32_t v2; | |
861 | qemu_get_sbe32s(f, &v2); | |
862 | ||
863 | if (*v == v2) | |
864 | return 0; | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | const VMStateInfo vmstate_info_int32_equal = { | |
869 | .name = "int32 equal", | |
870 | .get = get_int32_equal, | |
871 | .put = put_int32, | |
872 | }; | |
873 | ||
0a031e0a JQ |
874 | /* 32 bit int. See that the received value is the less or the same |
875 | than the one in the field */ | |
876 | ||
877 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
878 | { | |
879 | int32_t *old = pv; | |
880 | int32_t new; | |
881 | qemu_get_sbe32s(f, &new); | |
882 | ||
883 | if (*old <= new) | |
884 | return 0; | |
885 | return -EINVAL; | |
886 | } | |
887 | ||
888 | const VMStateInfo vmstate_info_int32_le = { | |
889 | .name = "int32 equal", | |
890 | .get = get_int32_le, | |
891 | .put = put_int32, | |
892 | }; | |
893 | ||
9ed7d6ae JQ |
894 | /* 64 bit int */ |
895 | ||
896 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
897 | { | |
898 | int64_t *v = pv; | |
899 | qemu_get_sbe64s(f, v); | |
900 | return 0; | |
901 | } | |
902 | ||
84e2e3eb | 903 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 904 | { |
84e2e3eb | 905 | int64_t *v = pv; |
9ed7d6ae JQ |
906 | qemu_put_sbe64s(f, v); |
907 | } | |
908 | ||
909 | const VMStateInfo vmstate_info_int64 = { | |
910 | .name = "int64", | |
911 | .get = get_int64, | |
912 | .put = put_int64, | |
913 | }; | |
914 | ||
915 | /* 8 bit unsigned int */ | |
916 | ||
917 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
918 | { | |
919 | uint8_t *v = pv; | |
920 | qemu_get_8s(f, v); | |
921 | return 0; | |
922 | } | |
923 | ||
84e2e3eb | 924 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 925 | { |
84e2e3eb | 926 | uint8_t *v = pv; |
9ed7d6ae JQ |
927 | qemu_put_8s(f, v); |
928 | } | |
929 | ||
930 | const VMStateInfo vmstate_info_uint8 = { | |
931 | .name = "uint8", | |
932 | .get = get_uint8, | |
933 | .put = put_uint8, | |
934 | }; | |
935 | ||
936 | /* 16 bit unsigned int */ | |
937 | ||
938 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
939 | { | |
940 | uint16_t *v = pv; | |
941 | qemu_get_be16s(f, v); | |
942 | return 0; | |
943 | } | |
944 | ||
84e2e3eb | 945 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 946 | { |
84e2e3eb | 947 | uint16_t *v = pv; |
9ed7d6ae JQ |
948 | qemu_put_be16s(f, v); |
949 | } | |
950 | ||
951 | const VMStateInfo vmstate_info_uint16 = { | |
952 | .name = "uint16", | |
953 | .get = get_uint16, | |
954 | .put = put_uint16, | |
955 | }; | |
956 | ||
957 | /* 32 bit unsigned int */ | |
958 | ||
959 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
960 | { | |
961 | uint32_t *v = pv; | |
962 | qemu_get_be32s(f, v); | |
963 | return 0; | |
964 | } | |
965 | ||
84e2e3eb | 966 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 967 | { |
84e2e3eb | 968 | uint32_t *v = pv; |
9ed7d6ae JQ |
969 | qemu_put_be32s(f, v); |
970 | } | |
971 | ||
972 | const VMStateInfo vmstate_info_uint32 = { | |
973 | .name = "uint32", | |
974 | .get = get_uint32, | |
975 | .put = put_uint32, | |
976 | }; | |
977 | ||
9122a8fe JQ |
978 | /* 32 bit uint. See that the received value is the same than the one |
979 | in the field */ | |
980 | ||
981 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
982 | { | |
983 | uint32_t *v = pv; | |
984 | uint32_t v2; | |
985 | qemu_get_be32s(f, &v2); | |
986 | ||
987 | if (*v == v2) { | |
988 | return 0; | |
989 | } | |
990 | return -EINVAL; | |
991 | } | |
992 | ||
993 | const VMStateInfo vmstate_info_uint32_equal = { | |
994 | .name = "uint32 equal", | |
995 | .get = get_uint32_equal, | |
996 | .put = put_uint32, | |
997 | }; | |
998 | ||
9ed7d6ae JQ |
999 | /* 64 bit unsigned int */ |
1000 | ||
1001 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1002 | { | |
1003 | uint64_t *v = pv; | |
1004 | qemu_get_be64s(f, v); | |
1005 | return 0; | |
1006 | } | |
1007 | ||
84e2e3eb | 1008 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1009 | { |
84e2e3eb | 1010 | uint64_t *v = pv; |
9ed7d6ae JQ |
1011 | qemu_put_be64s(f, v); |
1012 | } | |
1013 | ||
1014 | const VMStateInfo vmstate_info_uint64 = { | |
1015 | .name = "uint64", | |
1016 | .get = get_uint64, | |
1017 | .put = put_uint64, | |
1018 | }; | |
1019 | ||
80cd83e7 JQ |
1020 | /* 8 bit int. See that the received value is the same than the one |
1021 | in the field */ | |
1022 | ||
1023 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1024 | { | |
1025 | uint8_t *v = pv; | |
1026 | uint8_t v2; | |
1027 | qemu_get_8s(f, &v2); | |
1028 | ||
1029 | if (*v == v2) | |
1030 | return 0; | |
1031 | return -EINVAL; | |
1032 | } | |
1033 | ||
1034 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1035 | .name = "uint8 equal", |
80cd83e7 JQ |
1036 | .get = get_uint8_equal, |
1037 | .put = put_uint8, | |
1038 | }; | |
1039 | ||
dc3b83a0 JQ |
1040 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1041 | in the field */ | |
1042 | ||
1043 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1044 | { | |
1045 | uint16_t *v = pv; | |
1046 | uint16_t v2; | |
1047 | qemu_get_be16s(f, &v2); | |
1048 | ||
1049 | if (*v == v2) | |
1050 | return 0; | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | const VMStateInfo vmstate_info_uint16_equal = { | |
1055 | .name = "uint16 equal", | |
1056 | .get = get_uint16_equal, | |
1057 | .put = put_uint16, | |
1058 | }; | |
1059 | ||
dde0463b JQ |
1060 | /* timers */ |
1061 | ||
1062 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1063 | { | |
1064 | QEMUTimer *v = pv; | |
1065 | qemu_get_timer(f, v); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
84e2e3eb | 1069 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1070 | { |
84e2e3eb | 1071 | QEMUTimer *v = pv; |
dde0463b JQ |
1072 | qemu_put_timer(f, v); |
1073 | } | |
1074 | ||
1075 | const VMStateInfo vmstate_info_timer = { | |
1076 | .name = "timer", | |
1077 | .get = get_timer, | |
1078 | .put = put_timer, | |
1079 | }; | |
1080 | ||
6f67c50f JQ |
1081 | /* uint8_t buffers */ |
1082 | ||
1083 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1084 | { | |
1085 | uint8_t *v = pv; | |
1086 | qemu_get_buffer(f, v, size); | |
1087 | return 0; | |
1088 | } | |
1089 | ||
84e2e3eb | 1090 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1091 | { |
84e2e3eb | 1092 | uint8_t *v = pv; |
6f67c50f JQ |
1093 | qemu_put_buffer(f, v, size); |
1094 | } | |
1095 | ||
1096 | const VMStateInfo vmstate_info_buffer = { | |
1097 | .name = "buffer", | |
1098 | .get = get_buffer, | |
1099 | .put = put_buffer, | |
1100 | }; | |
1101 | ||
76507c75 | 1102 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1103 | not useful anymore */ |
76507c75 JQ |
1104 | |
1105 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1106 | { | |
21174c34 JK |
1107 | uint8_t buf[1024]; |
1108 | int block_len; | |
1109 | ||
1110 | while (size > 0) { | |
1111 | block_len = MIN(sizeof(buf), size); | |
1112 | size -= block_len; | |
1113 | qemu_get_buffer(f, buf, block_len); | |
1114 | } | |
1115 | return 0; | |
76507c75 JQ |
1116 | } |
1117 | ||
1118 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1119 | { | |
21174c34 JK |
1120 | static const uint8_t buf[1024]; |
1121 | int block_len; | |
1122 | ||
1123 | while (size > 0) { | |
1124 | block_len = MIN(sizeof(buf), size); | |
1125 | size -= block_len; | |
1126 | qemu_put_buffer(f, buf, block_len); | |
1127 | } | |
76507c75 JQ |
1128 | } |
1129 | ||
1130 | const VMStateInfo vmstate_info_unused_buffer = { | |
1131 | .name = "unused_buffer", | |
1132 | .get = get_unused_buffer, | |
1133 | .put = put_unused_buffer, | |
1134 | }; | |
1135 | ||
08e99e29 PM |
1136 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1137 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1138 | * bit words with the bits in big endian order. The in-memory format | |
1139 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1140 | */ | |
1141 | /* This is the number of 64 bit words sent over the wire */ | |
1142 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1143 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1144 | { | |
1145 | unsigned long *bmp = pv; | |
1146 | int i, idx = 0; | |
1147 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1148 | uint64_t w = qemu_get_be64(f); | |
1149 | bmp[idx++] = w; | |
1150 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1151 | bmp[idx++] = w >> 32; | |
1152 | } | |
1153 | } | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1158 | { | |
1159 | unsigned long *bmp = pv; | |
1160 | int i, idx = 0; | |
1161 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1162 | uint64_t w = bmp[idx++]; | |
1163 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1164 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1165 | } | |
1166 | qemu_put_be64(f, w); | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | const VMStateInfo vmstate_info_bitmap = { | |
1171 | .name = "bitmap", | |
1172 | .get = get_bitmap, | |
1173 | .put = put_bitmap, | |
1174 | }; | |
1175 | ||
7685ee6a AW |
1176 | typedef struct CompatEntry { |
1177 | char idstr[256]; | |
1178 | int instance_id; | |
1179 | } CompatEntry; | |
1180 | ||
a672b469 | 1181 | typedef struct SaveStateEntry { |
72cf2d4f | 1182 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1183 | char idstr[256]; |
1184 | int instance_id; | |
4d2ffa08 | 1185 | int alias_id; |
a672b469 AL |
1186 | int version_id; |
1187 | int section_id; | |
22ea40f4 | 1188 | SaveVMHandlers *ops; |
9ed7d6ae | 1189 | const VMStateDescription *vmsd; |
a672b469 | 1190 | void *opaque; |
7685ee6a | 1191 | CompatEntry *compat; |
24312968 | 1192 | int no_migrate; |
a7ae8355 | 1193 | int is_ram; |
a672b469 AL |
1194 | } SaveStateEntry; |
1195 | ||
c163b5ca | 1196 | |
72cf2d4f BS |
1197 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1198 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1199 | static int global_section_id; |
a672b469 | 1200 | |
8718e999 JQ |
1201 | static int calculate_new_instance_id(const char *idstr) |
1202 | { | |
1203 | SaveStateEntry *se; | |
1204 | int instance_id = 0; | |
1205 | ||
72cf2d4f | 1206 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1207 | if (strcmp(idstr, se->idstr) == 0 |
1208 | && instance_id <= se->instance_id) { | |
1209 | instance_id = se->instance_id + 1; | |
1210 | } | |
1211 | } | |
1212 | return instance_id; | |
1213 | } | |
1214 | ||
7685ee6a AW |
1215 | static int calculate_compat_instance_id(const char *idstr) |
1216 | { | |
1217 | SaveStateEntry *se; | |
1218 | int instance_id = 0; | |
1219 | ||
1220 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1221 | if (!se->compat) | |
1222 | continue; | |
1223 | ||
1224 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1225 | && instance_id <= se->compat->instance_id) { | |
1226 | instance_id = se->compat->instance_id + 1; | |
1227 | } | |
1228 | } | |
1229 | return instance_id; | |
1230 | } | |
1231 | ||
a672b469 AL |
1232 | /* TODO: Individual devices generally have very little idea about the rest |
1233 | of the system, so instance_id should be removed/replaced. | |
1234 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1235 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1236 | int register_savevm_live(DeviceState *dev, |
1237 | const char *idstr, | |
a672b469 AL |
1238 | int instance_id, |
1239 | int version_id, | |
7908c78d | 1240 | SaveVMHandlers *ops, |
a672b469 AL |
1241 | void *opaque) |
1242 | { | |
8718e999 | 1243 | SaveStateEntry *se; |
a672b469 | 1244 | |
7267c094 | 1245 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1246 | se->version_id = version_id; |
1247 | se->section_id = global_section_id++; | |
7908c78d | 1248 | se->ops = ops; |
a672b469 | 1249 | se->opaque = opaque; |
9ed7d6ae | 1250 | se->vmsd = NULL; |
24312968 | 1251 | se->no_migrate = 0; |
a7ae8355 | 1252 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1253 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1254 | se->is_ram = 1; |
1255 | } | |
a672b469 | 1256 | |
09e5ab63 AL |
1257 | if (dev) { |
1258 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1259 | if (id) { |
1260 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1261 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1262 | g_free(id); |
7685ee6a | 1263 | |
7267c094 | 1264 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1265 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1266 | se->compat->instance_id = instance_id == -1 ? | |
1267 | calculate_compat_instance_id(idstr) : instance_id; | |
1268 | instance_id = -1; | |
1269 | } | |
1270 | } | |
1271 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1272 | ||
8718e999 | 1273 | if (instance_id == -1) { |
7685ee6a | 1274 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1275 | } else { |
1276 | se->instance_id = instance_id; | |
a672b469 | 1277 | } |
7685ee6a | 1278 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1279 | /* add at the end of list */ |
72cf2d4f | 1280 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1281 | return 0; |
1282 | } | |
1283 | ||
0be71e32 AW |
1284 | int register_savevm(DeviceState *dev, |
1285 | const char *idstr, | |
a672b469 AL |
1286 | int instance_id, |
1287 | int version_id, | |
1288 | SaveStateHandler *save_state, | |
1289 | LoadStateHandler *load_state, | |
1290 | void *opaque) | |
1291 | { | |
7908c78d JQ |
1292 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1293 | ops->save_state = save_state; | |
1294 | ops->load_state = load_state; | |
0be71e32 | 1295 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1296 | ops, opaque); |
a672b469 AL |
1297 | } |
1298 | ||
0be71e32 | 1299 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1300 | { |
8718e999 | 1301 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1302 | char id[256] = ""; |
1303 | ||
09e5ab63 AL |
1304 | if (dev) { |
1305 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1306 | if (path) { |
1307 | pstrcpy(id, sizeof(id), path); | |
1308 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1309 | g_free(path); |
7685ee6a AW |
1310 | } |
1311 | } | |
1312 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1313 | |
72cf2d4f | 1314 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1315 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1316 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1317 | if (se->compat) { |
7267c094 | 1318 | g_free(se->compat); |
69e58af9 | 1319 | } |
22ea40f4 | 1320 | g_free(se->ops); |
7267c094 | 1321 | g_free(se); |
41bd13af | 1322 | } |
41bd13af AL |
1323 | } |
1324 | } | |
1325 | ||
0be71e32 | 1326 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1327 | const VMStateDescription *vmsd, |
1328 | void *opaque, int alias_id, | |
1329 | int required_for_version) | |
9ed7d6ae | 1330 | { |
8718e999 | 1331 | SaveStateEntry *se; |
9ed7d6ae | 1332 | |
4d2ffa08 JK |
1333 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1334 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1335 | ||
7267c094 | 1336 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1337 | se->version_id = vmsd->version_id; |
1338 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1339 | se->opaque = opaque; |
1340 | se->vmsd = vmsd; | |
4d2ffa08 | 1341 | se->alias_id = alias_id; |
2837c8ea | 1342 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1343 | |
09e5ab63 AL |
1344 | if (dev) { |
1345 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1346 | if (id) { |
1347 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1348 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1349 | g_free(id); |
7685ee6a | 1350 | |
7267c094 | 1351 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1352 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1353 | se->compat->instance_id = instance_id == -1 ? | |
1354 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1355 | instance_id = -1; | |
1356 | } | |
1357 | } | |
1358 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1359 | ||
8718e999 | 1360 | if (instance_id == -1) { |
7685ee6a | 1361 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1362 | } else { |
1363 | se->instance_id = instance_id; | |
9ed7d6ae | 1364 | } |
7685ee6a | 1365 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1366 | /* add at the end of list */ |
72cf2d4f | 1367 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1368 | return 0; |
1369 | } | |
1370 | ||
0be71e32 AW |
1371 | int vmstate_register(DeviceState *dev, int instance_id, |
1372 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1373 | { |
0be71e32 AW |
1374 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1375 | opaque, -1, 0); | |
4d2ffa08 JK |
1376 | } |
1377 | ||
0be71e32 AW |
1378 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1379 | void *opaque) | |
9ed7d6ae | 1380 | { |
1eb7538b JQ |
1381 | SaveStateEntry *se, *new_se; |
1382 | ||
72cf2d4f | 1383 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1384 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1385 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1386 | if (se->compat) { |
7267c094 | 1387 | g_free(se->compat); |
69e58af9 | 1388 | } |
7267c094 | 1389 | g_free(se); |
1eb7538b JQ |
1390 | } |
1391 | } | |
9ed7d6ae JQ |
1392 | } |
1393 | ||
811814bd JQ |
1394 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1395 | void *opaque); | |
1396 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1397 | void *opaque); | |
1398 | ||
9ed7d6ae JQ |
1399 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1400 | void *opaque, int version_id) | |
1401 | { | |
1402 | VMStateField *field = vmsd->fields; | |
811814bd | 1403 | int ret; |
9ed7d6ae JQ |
1404 | |
1405 | if (version_id > vmsd->version_id) { | |
1406 | return -EINVAL; | |
1407 | } | |
1408 | if (version_id < vmsd->minimum_version_id_old) { | |
1409 | return -EINVAL; | |
1410 | } | |
1411 | if (version_id < vmsd->minimum_version_id) { | |
1412 | return vmsd->load_state_old(f, opaque, version_id); | |
1413 | } | |
fd4d52de JQ |
1414 | if (vmsd->pre_load) { |
1415 | int ret = vmsd->pre_load(opaque); | |
1416 | if (ret) | |
1417 | return ret; | |
1418 | } | |
9ed7d6ae | 1419 | while(field->name) { |
f11f6a5f JQ |
1420 | if ((field->field_exists && |
1421 | field->field_exists(opaque, version_id)) || | |
1422 | (!field->field_exists && | |
1423 | field->version_id <= version_id)) { | |
f752a6aa | 1424 | void *base_addr = opaque + field->offset; |
811814bd | 1425 | int i, n_elems = 1; |
e61a1e0a | 1426 | int size = field->size; |
9ed7d6ae | 1427 | |
e61a1e0a JQ |
1428 | if (field->flags & VMS_VBUFFER) { |
1429 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1430 | if (field->flags & VMS_MULTIPLY) { |
1431 | size *= field->size; | |
1432 | } | |
e61a1e0a | 1433 | } |
f752a6aa JQ |
1434 | if (field->flags & VMS_ARRAY) { |
1435 | n_elems = field->num; | |
d6698281 JQ |
1436 | } else if (field->flags & VMS_VARRAY_INT32) { |
1437 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1438 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1439 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1440 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1441 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1442 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1443 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1444 | } |
dde0463b | 1445 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1446 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1447 | } |
f752a6aa | 1448 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1449 | void *addr = base_addr + size * i; |
ec245e21 | 1450 | |
19df438b JQ |
1451 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1452 | addr = *(void **)addr; | |
1453 | } | |
ec245e21 | 1454 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1455 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1456 | } else { |
e61a1e0a | 1457 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1458 | |
1459 | } | |
f752a6aa JQ |
1460 | if (ret < 0) { |
1461 | return ret; | |
1462 | } | |
9ed7d6ae JQ |
1463 | } |
1464 | } | |
1465 | field++; | |
1466 | } | |
811814bd JQ |
1467 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1468 | if (ret != 0) { | |
1469 | return ret; | |
1470 | } | |
752ff2fa | 1471 | if (vmsd->post_load) { |
e59fb374 | 1472 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1473 | } |
9ed7d6ae JQ |
1474 | return 0; |
1475 | } | |
1476 | ||
1477 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1478 | void *opaque) |
9ed7d6ae JQ |
1479 | { |
1480 | VMStateField *field = vmsd->fields; | |
1481 | ||
8fb0791d JQ |
1482 | if (vmsd->pre_save) { |
1483 | vmsd->pre_save(opaque); | |
1484 | } | |
9ed7d6ae | 1485 | while(field->name) { |
f11f6a5f JQ |
1486 | if (!field->field_exists || |
1487 | field->field_exists(opaque, vmsd->version_id)) { | |
1488 | void *base_addr = opaque + field->offset; | |
1489 | int i, n_elems = 1; | |
e61a1e0a | 1490 | int size = field->size; |
dde0463b | 1491 | |
e61a1e0a JQ |
1492 | if (field->flags & VMS_VBUFFER) { |
1493 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1494 | if (field->flags & VMS_MULTIPLY) { |
1495 | size *= field->size; | |
1496 | } | |
e61a1e0a | 1497 | } |
f11f6a5f JQ |
1498 | if (field->flags & VMS_ARRAY) { |
1499 | n_elems = field->num; | |
d6698281 JQ |
1500 | } else if (field->flags & VMS_VARRAY_INT32) { |
1501 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1502 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1503 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1504 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1505 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1506 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1507 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1508 | } |
1509 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1510 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1511 | } |
1512 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1513 | void *addr = base_addr + size * i; |
ec245e21 | 1514 | |
8595387e JQ |
1515 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1516 | addr = *(void **)addr; | |
1517 | } | |
f11f6a5f JQ |
1518 | if (field->flags & VMS_STRUCT) { |
1519 | vmstate_save_state(f, field->vmsd, addr); | |
1520 | } else { | |
e61a1e0a | 1521 | field->info->put(f, addr, size); |
f11f6a5f | 1522 | } |
ec245e21 | 1523 | } |
dde0463b | 1524 | } |
9ed7d6ae JQ |
1525 | field++; |
1526 | } | |
811814bd | 1527 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1528 | } |
1529 | ||
4082be4d JQ |
1530 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1531 | { | |
9ed7d6ae | 1532 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1533 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1534 | } |
1535 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1536 | } |
1537 | ||
dc912121 | 1538 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1539 | { |
9ed7d6ae | 1540 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1541 | se->ops->save_state(f, se->opaque); |
dc912121 | 1542 | return; |
9ed7d6ae JQ |
1543 | } |
1544 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1545 | } |
1546 | ||
a672b469 AL |
1547 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1548 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1549 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1550 | ||
1551 | #define QEMU_VM_EOF 0x00 | |
1552 | #define QEMU_VM_SECTION_START 0x01 | |
1553 | #define QEMU_VM_SECTION_PART 0x02 | |
1554 | #define QEMU_VM_SECTION_END 0x03 | |
1555 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1556 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1557 | |
e1c37d0e | 1558 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1559 | { |
1560 | SaveStateEntry *se; | |
1561 | ||
1562 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1563 | if (se->no_migrate) { | |
e1c37d0e | 1564 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1565 | return true; |
1566 | } | |
1567 | } | |
1568 | return false; | |
1569 | } | |
1570 | ||
6607ae23 IY |
1571 | int qemu_savevm_state_begin(QEMUFile *f, |
1572 | const MigrationParams *params) | |
a672b469 AL |
1573 | { |
1574 | SaveStateEntry *se; | |
39346385 | 1575 | int ret; |
a672b469 | 1576 | |
c163b5ca | 1577 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1578 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1579 | continue; |
6607ae23 | 1580 | } |
22ea40f4 | 1581 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1582 | } |
1583 | ||
a672b469 AL |
1584 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1585 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1586 | ||
72cf2d4f | 1587 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1588 | int len; |
1589 | ||
d1315aac | 1590 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1591 | continue; |
22ea40f4 | 1592 | } |
6bd68781 JQ |
1593 | if (se->ops && se->ops->is_active) { |
1594 | if (!se->ops->is_active(se->opaque)) { | |
1595 | continue; | |
1596 | } | |
1597 | } | |
a672b469 AL |
1598 | /* Section type */ |
1599 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1600 | qemu_put_be32(f, se->section_id); | |
1601 | ||
1602 | /* ID string */ | |
1603 | len = strlen(se->idstr); | |
1604 | qemu_put_byte(f, len); | |
1605 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1606 | ||
1607 | qemu_put_be32(f, se->instance_id); | |
1608 | qemu_put_be32(f, se->version_id); | |
1609 | ||
d1315aac | 1610 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1611 | if (ret < 0) { |
539de124 | 1612 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1613 | return ret; |
1614 | } | |
a672b469 | 1615 | } |
624b9cc2 | 1616 | ret = qemu_file_get_error(f); |
39346385 | 1617 | if (ret != 0) { |
539de124 | 1618 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1619 | } |
a672b469 | 1620 | |
39346385 JQ |
1621 | return ret; |
1622 | ||
a672b469 AL |
1623 | } |
1624 | ||
39346385 | 1625 | /* |
07f35073 | 1626 | * this function has three return values: |
39346385 JQ |
1627 | * negative: there was one error, and we have -errno. |
1628 | * 0 : We haven't finished, caller have to go again | |
1629 | * 1 : We have finished, we can go to complete phase | |
1630 | */ | |
539de124 | 1631 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1632 | { |
1633 | SaveStateEntry *se; | |
1634 | int ret = 1; | |
1635 | ||
72cf2d4f | 1636 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1637 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1638 | continue; |
22ea40f4 | 1639 | } |
6bd68781 JQ |
1640 | if (se->ops && se->ops->is_active) { |
1641 | if (!se->ops->is_active(se->opaque)) { | |
1642 | continue; | |
1643 | } | |
1644 | } | |
aac844ed JQ |
1645 | if (qemu_file_rate_limit(f)) { |
1646 | return 0; | |
1647 | } | |
517a13c9 | 1648 | trace_savevm_section_start(); |
a672b469 AL |
1649 | /* Section type */ |
1650 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1651 | qemu_put_be32(f, se->section_id); | |
1652 | ||
16310a3c | 1653 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1654 | trace_savevm_section_end(se->section_id); |
1655 | ||
2975725f | 1656 | if (ret <= 0) { |
90697be8 JK |
1657 | /* Do not proceed to the next vmstate before this one reported |
1658 | completion of the current stage. This serializes the migration | |
1659 | and reduces the probability that a faster changing state is | |
1660 | synchronized over and over again. */ | |
1661 | break; | |
1662 | } | |
a672b469 | 1663 | } |
39346385 JQ |
1664 | if (ret != 0) { |
1665 | return ret; | |
1666 | } | |
624b9cc2 | 1667 | ret = qemu_file_get_error(f); |
39346385 | 1668 | if (ret != 0) { |
539de124 | 1669 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1670 | } |
39346385 | 1671 | return ret; |
a672b469 AL |
1672 | } |
1673 | ||
539de124 | 1674 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1675 | { |
1676 | SaveStateEntry *se; | |
2975725f | 1677 | int ret; |
a672b469 | 1678 | |
ea375f9a JK |
1679 | cpu_synchronize_all_states(); |
1680 | ||
72cf2d4f | 1681 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1682 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1683 | continue; |
22ea40f4 | 1684 | } |
6bd68781 JQ |
1685 | if (se->ops && se->ops->is_active) { |
1686 | if (!se->ops->is_active(se->opaque)) { | |
1687 | continue; | |
1688 | } | |
1689 | } | |
517a13c9 | 1690 | trace_savevm_section_start(); |
a672b469 AL |
1691 | /* Section type */ |
1692 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1693 | qemu_put_be32(f, se->section_id); | |
1694 | ||
16310a3c | 1695 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1696 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1697 | if (ret < 0) { |
1698 | return ret; | |
1699 | } | |
a672b469 AL |
1700 | } |
1701 | ||
72cf2d4f | 1702 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1703 | int len; |
1704 | ||
22ea40f4 | 1705 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1706 | continue; |
22ea40f4 | 1707 | } |
517a13c9 | 1708 | trace_savevm_section_start(); |
a672b469 AL |
1709 | /* Section type */ |
1710 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1711 | qemu_put_be32(f, se->section_id); | |
1712 | ||
1713 | /* ID string */ | |
1714 | len = strlen(se->idstr); | |
1715 | qemu_put_byte(f, len); | |
1716 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1717 | ||
1718 | qemu_put_be32(f, se->instance_id); | |
1719 | qemu_put_be32(f, se->version_id); | |
1720 | ||
dc912121 | 1721 | vmstate_save(f, se); |
517a13c9 | 1722 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1723 | } |
1724 | ||
1725 | qemu_put_byte(f, QEMU_VM_EOF); | |
1726 | ||
624b9cc2 | 1727 | return qemu_file_get_error(f); |
a672b469 AL |
1728 | } |
1729 | ||
539de124 | 1730 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1731 | { |
1732 | SaveStateEntry *se; | |
1733 | ||
1734 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1735 | if (se->ops && se->ops->cancel) { |
1736 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1737 | } |
1738 | } | |
1739 | } | |
1740 | ||
e1c37d0e | 1741 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1742 | { |
a672b469 | 1743 | int ret; |
6607ae23 IY |
1744 | MigrationParams params = { |
1745 | .blk = 0, | |
1746 | .shared = 0 | |
1747 | }; | |
a672b469 | 1748 | |
e1c37d0e | 1749 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1750 | ret = -EINVAL; |
1751 | goto out; | |
1752 | } | |
1753 | ||
6607ae23 | 1754 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1755 | if (ret < 0) |
1756 | goto out; | |
1757 | ||
1758 | do { | |
539de124 | 1759 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1760 | if (ret < 0) |
1761 | goto out; | |
1762 | } while (ret == 0); | |
1763 | ||
539de124 | 1764 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1765 | |
1766 | out: | |
39346385 | 1767 | if (ret == 0) { |
624b9cc2 | 1768 | ret = qemu_file_get_error(f); |
39346385 | 1769 | } |
a672b469 | 1770 | |
a672b469 AL |
1771 | return ret; |
1772 | } | |
1773 | ||
a7ae8355 SS |
1774 | static int qemu_save_device_state(QEMUFile *f) |
1775 | { | |
1776 | SaveStateEntry *se; | |
1777 | ||
1778 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1779 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1780 | ||
1781 | cpu_synchronize_all_states(); | |
1782 | ||
1783 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1784 | int len; | |
1785 | ||
1786 | if (se->is_ram) { | |
1787 | continue; | |
1788 | } | |
22ea40f4 | 1789 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1790 | continue; |
1791 | } | |
1792 | ||
1793 | /* Section type */ | |
1794 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1795 | qemu_put_be32(f, se->section_id); | |
1796 | ||
1797 | /* ID string */ | |
1798 | len = strlen(se->idstr); | |
1799 | qemu_put_byte(f, len); | |
1800 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1801 | ||
1802 | qemu_put_be32(f, se->instance_id); | |
1803 | qemu_put_be32(f, se->version_id); | |
1804 | ||
1805 | vmstate_save(f, se); | |
1806 | } | |
1807 | ||
1808 | qemu_put_byte(f, QEMU_VM_EOF); | |
1809 | ||
1810 | return qemu_file_get_error(f); | |
1811 | } | |
1812 | ||
a672b469 AL |
1813 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1814 | { | |
1815 | SaveStateEntry *se; | |
1816 | ||
72cf2d4f | 1817 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1818 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1819 | (instance_id == se->instance_id || |
1820 | instance_id == se->alias_id)) | |
a672b469 | 1821 | return se; |
7685ee6a AW |
1822 | /* Migrating from an older version? */ |
1823 | if (strstr(se->idstr, idstr) && se->compat) { | |
1824 | if (!strcmp(se->compat->idstr, idstr) && | |
1825 | (instance_id == se->compat->instance_id || | |
1826 | instance_id == se->alias_id)) | |
1827 | return se; | |
1828 | } | |
a672b469 AL |
1829 | } |
1830 | return NULL; | |
1831 | } | |
1832 | ||
811814bd JQ |
1833 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1834 | { | |
1835 | while(sub && sub->needed) { | |
1836 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1837 | return sub->vmsd; | |
1838 | } | |
1839 | sub++; | |
1840 | } | |
1841 | return NULL; | |
1842 | } | |
1843 | ||
1844 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1845 | void *opaque) | |
1846 | { | |
c6380724 | 1847 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1848 | char idstr[256]; |
1849 | int ret; | |
c6380724 | 1850 | uint8_t version_id, len, size; |
811814bd JQ |
1851 | const VMStateDescription *sub_vmsd; |
1852 | ||
c6380724 JQ |
1853 | len = qemu_peek_byte(f, 1); |
1854 | if (len < strlen(vmsd->name) + 1) { | |
1855 | /* subsection name has be be "section_name/a" */ | |
1856 | return 0; | |
1857 | } | |
1858 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1859 | if (size != len) { | |
1860 | return 0; | |
1861 | } | |
1862 | idstr[size] = 0; | |
811814bd | 1863 | |
c6380724 JQ |
1864 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1865 | /* it don't have a valid subsection name */ | |
1866 | return 0; | |
1867 | } | |
3da9eebd | 1868 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1869 | if (sub_vmsd == NULL) { |
1870 | return -ENOENT; | |
1871 | } | |
c6380724 JQ |
1872 | qemu_file_skip(f, 1); /* subsection */ |
1873 | qemu_file_skip(f, 1); /* len */ | |
1874 | qemu_file_skip(f, len); /* idstr */ | |
1875 | version_id = qemu_get_be32(f); | |
1876 | ||
811814bd JQ |
1877 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1878 | if (ret) { | |
1879 | return ret; | |
1880 | } | |
1881 | } | |
1882 | return 0; | |
1883 | } | |
1884 | ||
1885 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1886 | void *opaque) | |
1887 | { | |
1888 | const VMStateSubsection *sub = vmsd->subsections; | |
1889 | ||
1890 | while (sub && sub->needed) { | |
1891 | if (sub->needed(opaque)) { | |
1892 | const VMStateDescription *vmsd = sub->vmsd; | |
1893 | uint8_t len; | |
1894 | ||
1895 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1896 | len = strlen(vmsd->name); | |
1897 | qemu_put_byte(f, len); | |
1898 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1899 | qemu_put_be32(f, vmsd->version_id); | |
1900 | vmstate_save_state(f, vmsd, opaque); | |
1901 | } | |
1902 | sub++; | |
1903 | } | |
1904 | } | |
1905 | ||
a672b469 | 1906 | typedef struct LoadStateEntry { |
72cf2d4f | 1907 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1908 | SaveStateEntry *se; |
1909 | int section_id; | |
1910 | int version_id; | |
a672b469 AL |
1911 | } LoadStateEntry; |
1912 | ||
a672b469 AL |
1913 | int qemu_loadvm_state(QEMUFile *f) |
1914 | { | |
72cf2d4f BS |
1915 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1916 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1917 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1918 | uint8_t section_type; |
1919 | unsigned int v; | |
1920 | int ret; | |
1921 | ||
e1c37d0e | 1922 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1923 | return -EINVAL; |
1924 | } | |
1925 | ||
a672b469 AL |
1926 | v = qemu_get_be32(f); |
1927 | if (v != QEMU_VM_FILE_MAGIC) | |
1928 | return -EINVAL; | |
1929 | ||
1930 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1931 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1932 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1933 | return -ENOTSUP; | |
1934 | } | |
a672b469 AL |
1935 | if (v != QEMU_VM_FILE_VERSION) |
1936 | return -ENOTSUP; | |
1937 | ||
1938 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1939 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1940 | SaveStateEntry *se; |
1941 | char idstr[257]; | |
1942 | int len; | |
1943 | ||
1944 | switch (section_type) { | |
1945 | case QEMU_VM_SECTION_START: | |
1946 | case QEMU_VM_SECTION_FULL: | |
1947 | /* Read section start */ | |
1948 | section_id = qemu_get_be32(f); | |
1949 | len = qemu_get_byte(f); | |
1950 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1951 | idstr[len] = 0; | |
1952 | instance_id = qemu_get_be32(f); | |
1953 | version_id = qemu_get_be32(f); | |
1954 | ||
1955 | /* Find savevm section */ | |
1956 | se = find_se(idstr, instance_id); | |
1957 | if (se == NULL) { | |
1958 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1959 | ret = -EINVAL; | |
1960 | goto out; | |
1961 | } | |
1962 | ||
1963 | /* Validate version */ | |
1964 | if (version_id > se->version_id) { | |
1965 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1966 | version_id, idstr, se->version_id); | |
1967 | ret = -EINVAL; | |
1968 | goto out; | |
1969 | } | |
1970 | ||
1971 | /* Add entry */ | |
7267c094 | 1972 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1973 | |
1974 | le->se = se; | |
1975 | le->section_id = section_id; | |
1976 | le->version_id = version_id; | |
72cf2d4f | 1977 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1978 | |
4082be4d | 1979 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1980 | if (ret < 0) { |
1981 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1982 | instance_id, idstr); | |
1983 | goto out; | |
1984 | } | |
a672b469 AL |
1985 | break; |
1986 | case QEMU_VM_SECTION_PART: | |
1987 | case QEMU_VM_SECTION_END: | |
1988 | section_id = qemu_get_be32(f); | |
1989 | ||
72cf2d4f | 1990 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1991 | if (le->section_id == section_id) { |
1992 | break; | |
1993 | } | |
1994 | } | |
a672b469 AL |
1995 | if (le == NULL) { |
1996 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1997 | ret = -EINVAL; | |
1998 | goto out; | |
1999 | } | |
2000 | ||
4082be4d | 2001 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2002 | if (ret < 0) { |
2003 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2004 | section_id); | |
2005 | goto out; | |
2006 | } | |
a672b469 AL |
2007 | break; |
2008 | default: | |
2009 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2010 | ret = -EINVAL; | |
2011 | goto out; | |
2012 | } | |
2013 | } | |
2014 | ||
ea375f9a JK |
2015 | cpu_synchronize_all_post_init(); |
2016 | ||
a672b469 AL |
2017 | ret = 0; |
2018 | ||
2019 | out: | |
72cf2d4f BS |
2020 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2021 | QLIST_REMOVE(le, entry); | |
7267c094 | 2022 | g_free(le); |
a672b469 AL |
2023 | } |
2024 | ||
42802d47 JQ |
2025 | if (ret == 0) { |
2026 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2027 | } |
a672b469 AL |
2028 | |
2029 | return ret; | |
2030 | } | |
2031 | ||
a672b469 AL |
2032 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2033 | const char *name) | |
2034 | { | |
2035 | QEMUSnapshotInfo *sn_tab, *sn; | |
2036 | int nb_sns, i, ret; | |
2037 | ||
2038 | ret = -ENOENT; | |
2039 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2040 | if (nb_sns < 0) | |
2041 | return ret; | |
2042 | for(i = 0; i < nb_sns; i++) { | |
2043 | sn = &sn_tab[i]; | |
2044 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2045 | *sn_info = *sn; | |
2046 | ret = 0; | |
2047 | break; | |
2048 | } | |
2049 | } | |
7267c094 | 2050 | g_free(sn_tab); |
a672b469 AL |
2051 | return ret; |
2052 | } | |
2053 | ||
cb499fb2 KW |
2054 | /* |
2055 | * Deletes snapshots of a given name in all opened images. | |
2056 | */ | |
2057 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2058 | { | |
2059 | BlockDriverState *bs; | |
cb499fb2 KW |
2060 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2061 | int ret; | |
2062 | ||
dbc13590 MA |
2063 | bs = NULL; |
2064 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2065 | if (bdrv_can_snapshot(bs) && |
2066 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2067 | { | |
2068 | ret = bdrv_snapshot_delete(bs, name); | |
2069 | if (ret < 0) { | |
2070 | monitor_printf(mon, | |
2071 | "Error while deleting snapshot on '%s'\n", | |
2072 | bdrv_get_device_name(bs)); | |
2073 | return -1; | |
2074 | } | |
2075 | } | |
2076 | } | |
2077 | ||
2078 | return 0; | |
2079 | } | |
2080 | ||
d54908a5 | 2081 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2082 | { |
2083 | BlockDriverState *bs, *bs1; | |
2084 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2085 | int ret; |
a672b469 AL |
2086 | QEMUFile *f; |
2087 | int saved_vm_running; | |
c2c9a466 | 2088 | uint64_t vm_state_size; |
a672b469 AL |
2089 | #ifdef _WIN32 |
2090 | struct _timeb tb; | |
7d631a11 | 2091 | struct tm *ptm; |
a672b469 AL |
2092 | #else |
2093 | struct timeval tv; | |
7d631a11 | 2094 | struct tm tm; |
a672b469 | 2095 | #endif |
d54908a5 | 2096 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2097 | |
feeee5ac | 2098 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2099 | bs = NULL; |
2100 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2101 | |
07b70bfb | 2102 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2103 | continue; |
2104 | } | |
2105 | ||
2106 | if (!bdrv_can_snapshot(bs)) { | |
2107 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2108 | bdrv_get_device_name(bs)); | |
2109 | return; | |
2110 | } | |
2111 | } | |
2112 | ||
f9092b10 | 2113 | bs = bdrv_snapshots(); |
a672b469 | 2114 | if (!bs) { |
376253ec | 2115 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2116 | return; |
2117 | } | |
a672b469 | 2118 | |
1354869c | 2119 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2120 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2121 | |
cb499fb2 | 2122 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2123 | |
2124 | /* fill auxiliary fields */ | |
2125 | #ifdef _WIN32 | |
2126 | _ftime(&tb); | |
2127 | sn->date_sec = tb.time; | |
2128 | sn->date_nsec = tb.millitm * 1000000; | |
2129 | #else | |
2130 | gettimeofday(&tv, NULL); | |
2131 | sn->date_sec = tv.tv_sec; | |
2132 | sn->date_nsec = tv.tv_usec * 1000; | |
2133 | #endif | |
74475455 | 2134 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2135 | |
7d631a11 MDCF |
2136 | if (name) { |
2137 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2138 | if (ret >= 0) { | |
2139 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2140 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2141 | } else { | |
2142 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2143 | } | |
2144 | } else { | |
2145 | #ifdef _WIN32 | |
55dd9ffa SW |
2146 | time_t t = tb.time; |
2147 | ptm = localtime(&t); | |
7d631a11 MDCF |
2148 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2149 | #else | |
d7d9b528 BS |
2150 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2151 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2152 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2153 | #endif | |
2154 | } | |
2155 | ||
cb499fb2 | 2156 | /* Delete old snapshots of the same name */ |
f139a412 | 2157 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2158 | goto the_end; |
2159 | } | |
2160 | ||
a672b469 | 2161 | /* save the VM state */ |
45566e9c | 2162 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2163 | if (!f) { |
376253ec | 2164 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2165 | goto the_end; |
2166 | } | |
e1c37d0e | 2167 | ret = qemu_savevm_state(f); |
2d22b18f | 2168 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2169 | qemu_fclose(f); |
2170 | if (ret < 0) { | |
376253ec | 2171 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2172 | goto the_end; |
2173 | } | |
2174 | ||
2175 | /* create the snapshots */ | |
2176 | ||
dbc13590 MA |
2177 | bs1 = NULL; |
2178 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2179 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2180 | /* Write VM state size only to the image that contains the state */ |
2181 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2182 | ret = bdrv_snapshot_create(bs1, sn); |
2183 | if (ret < 0) { | |
376253ec AL |
2184 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2185 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2186 | } |
2187 | } | |
2188 | } | |
2189 | ||
2190 | the_end: | |
2191 | if (saved_vm_running) | |
2192 | vm_start(); | |
2193 | } | |
2194 | ||
a7ae8355 SS |
2195 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2196 | { | |
2197 | QEMUFile *f; | |
2198 | int saved_vm_running; | |
2199 | int ret; | |
2200 | ||
2201 | saved_vm_running = runstate_is_running(); | |
2202 | vm_stop(RUN_STATE_SAVE_VM); | |
2203 | ||
2204 | f = qemu_fopen(filename, "wb"); | |
2205 | if (!f) { | |
2206 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2207 | goto the_end; | |
2208 | } | |
2209 | ret = qemu_save_device_state(f); | |
2210 | qemu_fclose(f); | |
2211 | if (ret < 0) { | |
2212 | error_set(errp, QERR_IO_ERROR); | |
2213 | } | |
2214 | ||
2215 | the_end: | |
2216 | if (saved_vm_running) | |
2217 | vm_start(); | |
a7ae8355 SS |
2218 | } |
2219 | ||
03cd4655 | 2220 | int load_vmstate(const char *name) |
a672b469 | 2221 | { |
f0aa7a8b | 2222 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2223 | QEMUSnapshotInfo sn; |
a672b469 | 2224 | QEMUFile *f; |
751c6a17 | 2225 | int ret; |
a672b469 | 2226 | |
f0aa7a8b MDCF |
2227 | bs_vm_state = bdrv_snapshots(); |
2228 | if (!bs_vm_state) { | |
2229 | error_report("No block device supports snapshots"); | |
2230 | return -ENOTSUP; | |
2231 | } | |
2232 | ||
2233 | /* Don't even try to load empty VM states */ | |
2234 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2235 | if (ret < 0) { | |
2236 | return ret; | |
2237 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2238 | error_report("This is a disk-only snapshot. Revert to it offline " |
2239 | "using qemu-img."); | |
f0aa7a8b MDCF |
2240 | return -EINVAL; |
2241 | } | |
2242 | ||
2243 | /* Verify if there is any device that doesn't support snapshots and is | |
2244 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2245 | bs = NULL; |
2246 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2247 | |
07b70bfb | 2248 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2249 | continue; |
2250 | } | |
2251 | ||
2252 | if (!bdrv_can_snapshot(bs)) { | |
2253 | error_report("Device '%s' is writable but does not support snapshots.", | |
2254 | bdrv_get_device_name(bs)); | |
2255 | return -ENOTSUP; | |
2256 | } | |
feeee5ac | 2257 | |
f0aa7a8b MDCF |
2258 | ret = bdrv_snapshot_find(bs, &sn, name); |
2259 | if (ret < 0) { | |
2260 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2261 | bdrv_get_device_name(bs), name); | |
2262 | return ret; | |
2263 | } | |
a672b469 AL |
2264 | } |
2265 | ||
2266 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2267 | bdrv_drain_all(); |
a672b469 | 2268 | |
f0aa7a8b MDCF |
2269 | bs = NULL; |
2270 | while ((bs = bdrv_next(bs))) { | |
2271 | if (bdrv_can_snapshot(bs)) { | |
2272 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2273 | if (ret < 0) { |
f0aa7a8b MDCF |
2274 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2275 | ret, name, bdrv_get_device_name(bs)); | |
2276 | return ret; | |
a672b469 AL |
2277 | } |
2278 | } | |
2279 | } | |
2280 | ||
a672b469 | 2281 | /* restore the VM state */ |
f0aa7a8b | 2282 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2283 | if (!f) { |
1ecda02b | 2284 | error_report("Could not open VM state file"); |
05f2401e | 2285 | return -EINVAL; |
a672b469 | 2286 | } |
f0aa7a8b | 2287 | |
5a8a49d7 | 2288 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2289 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2290 | |
a672b469 AL |
2291 | qemu_fclose(f); |
2292 | if (ret < 0) { | |
1ecda02b | 2293 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2294 | return ret; |
a672b469 | 2295 | } |
f0aa7a8b | 2296 | |
05f2401e | 2297 | return 0; |
7b630349 JQ |
2298 | } |
2299 | ||
d54908a5 | 2300 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2301 | { |
2302 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2303 | int ret; |
d54908a5 | 2304 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2305 | |
f9092b10 | 2306 | bs = bdrv_snapshots(); |
a672b469 | 2307 | if (!bs) { |
376253ec | 2308 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2309 | return; |
2310 | } | |
2311 | ||
dbc13590 MA |
2312 | bs1 = NULL; |
2313 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2314 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2315 | ret = bdrv_snapshot_delete(bs1, name); |
2316 | if (ret < 0) { | |
2317 | if (ret == -ENOTSUP) | |
376253ec AL |
2318 | monitor_printf(mon, |
2319 | "Snapshots not supported on device '%s'\n", | |
2320 | bdrv_get_device_name(bs1)); | |
a672b469 | 2321 | else |
376253ec AL |
2322 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2323 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2324 | } |
2325 | } | |
2326 | } | |
2327 | } | |
2328 | ||
376253ec | 2329 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2330 | { |
2331 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2332 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2333 | int nb_sns, i, ret, available; | |
2334 | int total; | |
2335 | int *available_snapshots; | |
a672b469 AL |
2336 | char buf[256]; |
2337 | ||
f9092b10 | 2338 | bs = bdrv_snapshots(); |
a672b469 | 2339 | if (!bs) { |
376253ec | 2340 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2341 | return; |
2342 | } | |
a672b469 AL |
2343 | |
2344 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2345 | if (nb_sns < 0) { | |
376253ec | 2346 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2347 | return; |
2348 | } | |
f9209915 MDCF |
2349 | |
2350 | if (nb_sns == 0) { | |
2351 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2352 | return; | |
2353 | } | |
2354 | ||
7267c094 | 2355 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2356 | total = 0; |
2357 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2358 | sn = &sn_tab[i]; |
f9209915 MDCF |
2359 | available = 1; |
2360 | bs1 = NULL; | |
2361 | ||
2362 | while ((bs1 = bdrv_next(bs1))) { | |
2363 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2364 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2365 | if (ret < 0) { | |
2366 | available = 0; | |
2367 | break; | |
2368 | } | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | if (available) { | |
2373 | available_snapshots[total] = i; | |
2374 | total++; | |
2375 | } | |
a672b469 | 2376 | } |
f9209915 MDCF |
2377 | |
2378 | if (total > 0) { | |
2379 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2380 | for (i = 0; i < total; i++) { | |
2381 | sn = &sn_tab[available_snapshots[i]]; | |
2382 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2383 | } | |
2384 | } else { | |
2385 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2386 | } | |
2387 | ||
7267c094 AL |
2388 | g_free(sn_tab); |
2389 | g_free(available_snapshots); | |
f9209915 | 2390 | |
a672b469 | 2391 | } |
c5705a77 AK |
2392 | |
2393 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2394 | { | |
1ddde087 | 2395 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2396 | memory_region_name(mr), dev); |
2397 | } | |
2398 | ||
2399 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2400 | { | |
2401 | /* Nothing do to while the implementation is in RAMBlock */ | |
2402 | } | |
2403 | ||
2404 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2405 | { | |
2406 | vmstate_register_ram(mr, NULL); | |
2407 | } | |
302dfbeb OW |
2408 | |
2409 | /* | |
2410 | page = zrun nzrun | |
2411 | | zrun nzrun page | |
2412 | ||
2413 | zrun = length | |
2414 | ||
2415 | nzrun = length byte... | |
2416 | ||
2417 | length = uleb128 encoded integer | |
2418 | */ | |
2419 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2420 | uint8_t *dst, int dlen) | |
2421 | { | |
2422 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2423 | int d = 0, i = 0; | |
2424 | long res, xor; | |
2425 | uint8_t *nzrun_start = NULL; | |
2426 | ||
2427 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2428 | sizeof(long))); | |
2429 | ||
2430 | while (i < slen) { | |
2431 | /* overflow */ | |
2432 | if (d + 2 > dlen) { | |
2433 | return -1; | |
2434 | } | |
2435 | ||
2436 | /* not aligned to sizeof(long) */ | |
2437 | res = (slen - i) % sizeof(long); | |
2438 | while (res && old_buf[i] == new_buf[i]) { | |
2439 | zrun_len++; | |
2440 | i++; | |
2441 | res--; | |
2442 | } | |
2443 | ||
2444 | /* word at a time for speed */ | |
2445 | if (!res) { | |
2446 | while (i < slen && | |
2447 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2448 | i += sizeof(long); | |
2449 | zrun_len += sizeof(long); | |
2450 | } | |
2451 | ||
2452 | /* go over the rest */ | |
2453 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2454 | zrun_len++; | |
2455 | i++; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | /* buffer unchanged */ | |
2460 | if (zrun_len == slen) { | |
2461 | return 0; | |
2462 | } | |
2463 | ||
2464 | /* skip last zero run */ | |
2465 | if (i == slen) { | |
2466 | return d; | |
2467 | } | |
2468 | ||
2469 | d += uleb128_encode_small(dst + d, zrun_len); | |
2470 | ||
2471 | zrun_len = 0; | |
2472 | nzrun_start = new_buf + i; | |
2473 | ||
2474 | /* overflow */ | |
2475 | if (d + 2 > dlen) { | |
2476 | return -1; | |
2477 | } | |
2478 | /* not aligned to sizeof(long) */ | |
2479 | res = (slen - i) % sizeof(long); | |
2480 | while (res && old_buf[i] != new_buf[i]) { | |
2481 | i++; | |
2482 | nzrun_len++; | |
2483 | res--; | |
2484 | } | |
2485 | ||
2486 | /* word at a time for speed, use of 32-bit long okay */ | |
2487 | if (!res) { | |
2488 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2489 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2490 | while (i < slen) { |
2491 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2492 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2493 | /* found the end of an nzrun within the current long */ | |
2494 | while (old_buf[i] != new_buf[i]) { | |
2495 | nzrun_len++; | |
2496 | i++; | |
2497 | } | |
2498 | break; | |
2499 | } else { | |
2500 | i += sizeof(long); | |
2501 | nzrun_len += sizeof(long); | |
2502 | } | |
2503 | } | |
2504 | } | |
2505 | ||
2506 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2507 | /* overflow */ | |
2508 | if (d + nzrun_len > dlen) { | |
2509 | return -1; | |
2510 | } | |
2511 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2512 | d += nzrun_len; | |
2513 | nzrun_len = 0; | |
2514 | } | |
2515 | ||
2516 | return d; | |
2517 | } | |
2518 | ||
2519 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2520 | { | |
2521 | int i = 0, d = 0; | |
2522 | int ret; | |
2523 | uint32_t count = 0; | |
2524 | ||
2525 | while (i < slen) { | |
2526 | ||
2527 | /* zrun */ | |
2528 | if ((slen - i) < 2) { | |
2529 | return -1; | |
2530 | } | |
2531 | ||
2532 | ret = uleb128_decode_small(src + i, &count); | |
2533 | if (ret < 0 || (i && !count)) { | |
2534 | return -1; | |
2535 | } | |
2536 | i += ret; | |
2537 | d += count; | |
2538 | ||
2539 | /* overflow */ | |
2540 | if (d > dlen) { | |
2541 | return -1; | |
2542 | } | |
2543 | ||
2544 | /* nzrun */ | |
2545 | if ((slen - i) < 2) { | |
2546 | return -1; | |
2547 | } | |
2548 | ||
2549 | ret = uleb128_decode_small(src + i, &count); | |
2550 | if (ret < 0 || !count) { | |
2551 | return -1; | |
2552 | } | |
2553 | i += ret; | |
2554 | ||
2555 | /* overflow */ | |
2556 | if (d + count > dlen || i + count > slen) { | |
2557 | return -1; | |
2558 | } | |
2559 | ||
2560 | memcpy(dst + d, src + i, count); | |
2561 | d += count; | |
2562 | i += count; | |
2563 | } | |
2564 | ||
2565 | return d; | |
2566 | } |