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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 { | |
9229bf3c | 166 | const QEMUFileOps *ops; |
a672b469 AL |
167 | void *opaque; |
168 | int is_write; | |
169 | ||
170 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
171 | when reading */ | |
172 | int buf_index; | |
173 | int buf_size; /* 0 when writing */ | |
174 | uint8_t buf[IO_BUF_SIZE]; | |
175 | ||
3961b4dd | 176 | int last_error; |
a672b469 AL |
177 | }; |
178 | ||
7f79dd28 | 179 | typedef struct QEMUFileStdio |
a672b469 | 180 | { |
7f79dd28 | 181 | FILE *stdio_file; |
a672b469 | 182 | QEMUFile *file; |
7f79dd28 | 183 | } QEMUFileStdio; |
a672b469 AL |
184 | |
185 | typedef struct QEMUFileSocket | |
186 | { | |
187 | int fd; | |
188 | QEMUFile *file; | |
189 | } QEMUFileSocket; | |
190 | ||
70eb6330 PB |
191 | static int socket_get_fd(void *opaque) |
192 | { | |
193 | QEMUFileSocket *s = opaque; | |
194 | ||
195 | return s->fd; | |
196 | } | |
197 | ||
a672b469 AL |
198 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
199 | { | |
200 | QEMUFileSocket *s = opaque; | |
201 | ssize_t len; | |
202 | ||
203 | do { | |
00aa0040 | 204 | len = qemu_recv(s->fd, buf, size, 0); |
a672b469 AL |
205 | } while (len == -1 && socket_error() == EINTR); |
206 | ||
207 | if (len == -1) | |
208 | len = -socket_error(); | |
209 | ||
210 | return len; | |
211 | } | |
212 | ||
213 | static int socket_close(void *opaque) | |
214 | { | |
215 | QEMUFileSocket *s = opaque; | |
7267c094 | 216 | g_free(s); |
a672b469 AL |
217 | return 0; |
218 | } | |
219 | ||
70eb6330 PB |
220 | static int stdio_get_fd(void *opaque) |
221 | { | |
222 | QEMUFileStdio *s = opaque; | |
223 | ||
224 | return fileno(s->stdio_file); | |
225 | } | |
226 | ||
7f79dd28 | 227 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 228 | { |
7f79dd28 PB |
229 | QEMUFileStdio *s = opaque; |
230 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
231 | } |
232 | ||
7f79dd28 | 233 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 234 | { |
7f79dd28 PB |
235 | QEMUFileStdio *s = opaque; |
236 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
237 | int bytes; |
238 | ||
239 | do { | |
240 | clearerr(fp); | |
241 | bytes = fread(buf, 1, size, fp); | |
242 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); | |
243 | return bytes; | |
a672b469 AL |
244 | } |
245 | ||
7f79dd28 PB |
246 | static int stdio_pclose(void *opaque) |
247 | { | |
248 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
249 | int ret; |
250 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
251 | if (ret == -1) { |
252 | ret = -errno; | |
253 | } | |
7267c094 | 254 | g_free(s); |
41ef56e6 | 255 | return ret; |
7f79dd28 PB |
256 | } |
257 | ||
258 | static int stdio_fclose(void *opaque) | |
a672b469 | 259 | { |
7f79dd28 | 260 | QEMUFileStdio *s = opaque; |
0e286705 EH |
261 | int ret = 0; |
262 | if (fclose(s->stdio_file) == EOF) { | |
263 | ret = -errno; | |
264 | } | |
7267c094 | 265 | g_free(s); |
0e286705 | 266 | return ret; |
a672b469 AL |
267 | } |
268 | ||
9229bf3c | 269 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 270 | .get_fd = stdio_get_fd, |
9229bf3c PB |
271 | .get_buffer = stdio_get_buffer, |
272 | .close = stdio_pclose | |
273 | }; | |
274 | ||
275 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 276 | .get_fd = stdio_get_fd, |
9229bf3c PB |
277 | .put_buffer = stdio_put_buffer, |
278 | .close = stdio_pclose | |
279 | }; | |
280 | ||
7f79dd28 | 281 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 282 | { |
7f79dd28 | 283 | QEMUFileStdio *s; |
a672b469 | 284 | |
7f79dd28 | 285 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
286 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
287 | return NULL; | |
288 | } | |
289 | ||
7267c094 | 290 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 291 | |
7f79dd28 | 292 | s->stdio_file = stdio_file; |
a672b469 AL |
293 | |
294 | if(mode[0] == 'r') { | |
9229bf3c | 295 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 296 | } else { |
9229bf3c | 297 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 298 | } |
a672b469 AL |
299 | return s->file; |
300 | } | |
301 | ||
302 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
303 | { | |
304 | FILE *popen_file; | |
305 | ||
306 | popen_file = popen(command, mode); | |
307 | if(popen_file == NULL) { | |
308 | return NULL; | |
309 | } | |
310 | ||
311 | return qemu_popen(popen_file, mode); | |
312 | } | |
313 | ||
7f79dd28 | 314 | int qemu_stdio_fd(QEMUFile *f) |
8a43b1ea | 315 | { |
7f79dd28 | 316 | QEMUFileStdio *p; |
8a43b1ea CL |
317 | int fd; |
318 | ||
7f79dd28 PB |
319 | p = (QEMUFileStdio *)f->opaque; |
320 | fd = fileno(p->stdio_file); | |
8a43b1ea CL |
321 | |
322 | return fd; | |
323 | } | |
324 | ||
9229bf3c | 325 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 326 | .get_fd = stdio_get_fd, |
9229bf3c PB |
327 | .get_buffer = stdio_get_buffer, |
328 | .close = stdio_fclose | |
329 | }; | |
330 | ||
331 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 332 | .get_fd = stdio_get_fd, |
9229bf3c PB |
333 | .put_buffer = stdio_put_buffer, |
334 | .close = stdio_fclose | |
335 | }; | |
336 | ||
5ac1fad3 PB |
337 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
338 | { | |
339 | QEMUFileStdio *s; | |
340 | ||
341 | if (mode == NULL || | |
342 | (mode[0] != 'r' && mode[0] != 'w') || | |
343 | mode[1] != 'b' || mode[2] != 0) { | |
344 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
345 | return NULL; | |
346 | } | |
347 | ||
7267c094 | 348 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
349 | s->stdio_file = fdopen(fd, mode); |
350 | if (!s->stdio_file) | |
351 | goto fail; | |
352 | ||
353 | if(mode[0] == 'r') { | |
9229bf3c | 354 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 355 | } else { |
9229bf3c | 356 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
357 | } |
358 | return s->file; | |
359 | ||
360 | fail: | |
7267c094 | 361 | g_free(s); |
5ac1fad3 PB |
362 | return NULL; |
363 | } | |
364 | ||
9229bf3c | 365 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 366 | .get_fd = socket_get_fd, |
9229bf3c PB |
367 | .get_buffer = socket_get_buffer, |
368 | .close = socket_close | |
369 | }; | |
370 | ||
a672b469 AL |
371 | QEMUFile *qemu_fopen_socket(int fd) |
372 | { | |
7267c094 | 373 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 374 | |
a672b469 | 375 | s->fd = fd; |
9229bf3c | 376 | s->file = qemu_fopen_ops(s, &socket_read_ops); |
a672b469 AL |
377 | return s->file; |
378 | } | |
379 | ||
a672b469 AL |
380 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
381 | { | |
382 | QEMUFileStdio *s; | |
383 | ||
7f79dd28 PB |
384 | if (mode == NULL || |
385 | (mode[0] != 'r' && mode[0] != 'w') || | |
386 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 387 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
388 | return NULL; |
389 | } | |
390 | ||
7267c094 | 391 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 392 | |
7f79dd28 PB |
393 | s->stdio_file = fopen(filename, mode); |
394 | if (!s->stdio_file) | |
a672b469 | 395 | goto fail; |
c163b5ca | 396 | |
7f79dd28 | 397 | if(mode[0] == 'w') { |
9229bf3c | 398 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 399 | } else { |
9229bf3c | 400 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
401 | } |
402 | return s->file; | |
a672b469 | 403 | fail: |
7267c094 | 404 | g_free(s); |
a672b469 AL |
405 | return NULL; |
406 | } | |
407 | ||
178e08a5 | 408 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
409 | int64_t pos, int size) |
410 | { | |
45566e9c | 411 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
412 | return size; |
413 | } | |
414 | ||
178e08a5 | 415 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 416 | { |
45566e9c | 417 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
418 | } |
419 | ||
420 | static int bdrv_fclose(void *opaque) | |
421 | { | |
ad492c92 | 422 | return bdrv_flush(opaque); |
a672b469 AL |
423 | } |
424 | ||
9229bf3c PB |
425 | static const QEMUFileOps bdrv_read_ops = { |
426 | .get_buffer = block_get_buffer, | |
427 | .close = bdrv_fclose | |
428 | }; | |
429 | ||
430 | static const QEMUFileOps bdrv_write_ops = { | |
431 | .put_buffer = block_put_buffer, | |
432 | .close = bdrv_fclose | |
433 | }; | |
434 | ||
45566e9c | 435 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 436 | { |
a672b469 | 437 | if (is_writable) |
9229bf3c PB |
438 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
439 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
440 | } |
441 | ||
9229bf3c | 442 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
443 | { |
444 | QEMUFile *f; | |
445 | ||
7267c094 | 446 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
447 | |
448 | f->opaque = opaque; | |
9229bf3c | 449 | f->ops = ops; |
a672b469 AL |
450 | f->is_write = 0; |
451 | ||
452 | return f; | |
453 | } | |
454 | ||
624b9cc2 | 455 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 456 | { |
3961b4dd | 457 | return f->last_error; |
a672b469 AL |
458 | } |
459 | ||
6f121ff5 | 460 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 461 | { |
3961b4dd | 462 | f->last_error = ret; |
4dabe248 AL |
463 | } |
464 | ||
d82ca915 EH |
465 | /** Flushes QEMUFile buffer |
466 | * | |
d82ca915 | 467 | */ |
7311bea3 | 468 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 469 | { |
7311bea3 JQ |
470 | int ret = 0; |
471 | ||
9229bf3c | 472 | if (!f->ops->put_buffer) |
7311bea3 | 473 | return 0; |
a672b469 AL |
474 | |
475 | if (f->is_write && f->buf_index > 0) { | |
9229bf3c | 476 | ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
7311bea3 | 477 | if (ret >= 0) { |
a672b469 | 478 | f->buf_offset += f->buf_index; |
7311bea3 | 479 | } |
a672b469 AL |
480 | f->buf_index = 0; |
481 | } | |
7311bea3 | 482 | return ret; |
a672b469 AL |
483 | } |
484 | ||
485 | static void qemu_fill_buffer(QEMUFile *f) | |
486 | { | |
487 | int len; | |
0046c45b | 488 | int pending; |
a672b469 | 489 | |
9229bf3c | 490 | if (!f->ops->get_buffer) |
a672b469 AL |
491 | return; |
492 | ||
493 | if (f->is_write) | |
494 | abort(); | |
495 | ||
0046c45b JQ |
496 | pending = f->buf_size - f->buf_index; |
497 | if (pending > 0) { | |
498 | memmove(f->buf, f->buf + f->buf_index, pending); | |
499 | } | |
500 | f->buf_index = 0; | |
501 | f->buf_size = pending; | |
502 | ||
9229bf3c | 503 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
0046c45b | 504 | IO_BUF_SIZE - pending); |
a672b469 | 505 | if (len > 0) { |
0046c45b | 506 | f->buf_size += len; |
a672b469 | 507 | f->buf_offset += len; |
fa39a30f | 508 | } else if (len == 0) { |
02c4a051 | 509 | qemu_file_set_error(f, -EIO); |
a672b469 | 510 | } else if (len != -EAGAIN) |
c29110d5 | 511 | qemu_file_set_error(f, len); |
a672b469 AL |
512 | } |
513 | ||
70eb6330 PB |
514 | int qemu_get_fd(QEMUFile *f) |
515 | { | |
516 | if (f->ops->get_fd) { | |
517 | return f->ops->get_fd(f->opaque); | |
518 | } | |
519 | return -1; | |
520 | } | |
521 | ||
d82ca915 EH |
522 | /** Closes the file |
523 | * | |
524 | * Returns negative error value if any error happened on previous operations or | |
525 | * while closing the file. Returns 0 or positive number on success. | |
526 | * | |
527 | * The meaning of return value on success depends on the specific backend | |
528 | * being used. | |
529 | */ | |
530 | int qemu_fclose(QEMUFile *f) | |
531 | { | |
29eee86f | 532 | int ret; |
7311bea3 | 533 | ret = qemu_fflush(f); |
7311bea3 | 534 | |
9229bf3c PB |
535 | if (f->ops->close) { |
536 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
537 | if (ret >= 0) { |
538 | ret = ret2; | |
539 | } | |
7311bea3 | 540 | } |
d82ca915 EH |
541 | /* If any error was spotted before closing, we should report it |
542 | * instead of the close() return value. | |
543 | */ | |
544 | if (f->last_error) { | |
545 | ret = f->last_error; | |
546 | } | |
7267c094 | 547 | g_free(f); |
a672b469 AL |
548 | return ret; |
549 | } | |
550 | ||
a2b41351 | 551 | int qemu_file_put_notify(QEMUFile *f) |
a672b469 | 552 | { |
9229bf3c | 553 | return f->ops->put_buffer(f->opaque, NULL, 0, 0); |
a672b469 AL |
554 | } |
555 | ||
556 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
557 | { | |
558 | int l; | |
559 | ||
c10682cb JQ |
560 | if (f->last_error) { |
561 | return; | |
562 | } | |
563 | ||
564 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
565 | fprintf(stderr, |
566 | "Attempted to write to buffer while read buffer is not empty\n"); | |
567 | abort(); | |
568 | } | |
569 | ||
c10682cb | 570 | while (size > 0) { |
a672b469 AL |
571 | l = IO_BUF_SIZE - f->buf_index; |
572 | if (l > size) | |
573 | l = size; | |
574 | memcpy(f->buf + f->buf_index, buf, l); | |
575 | f->is_write = 1; | |
576 | f->buf_index += l; | |
577 | buf += l; | |
578 | size -= l; | |
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 | break; | |
584 | } | |
7311bea3 | 585 | } |
a672b469 AL |
586 | } |
587 | } | |
588 | ||
589 | void qemu_put_byte(QEMUFile *f, int v) | |
590 | { | |
c10682cb JQ |
591 | if (f->last_error) { |
592 | return; | |
593 | } | |
594 | ||
595 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
596 | fprintf(stderr, |
597 | "Attempted to write to buffer while read buffer is not empty\n"); | |
598 | abort(); | |
599 | } | |
600 | ||
601 | f->buf[f->buf_index++] = v; | |
602 | f->is_write = 1; | |
7311bea3 JQ |
603 | if (f->buf_index >= IO_BUF_SIZE) { |
604 | int ret = qemu_fflush(f); | |
c10682cb JQ |
605 | if (ret < 0) { |
606 | qemu_file_set_error(f, ret); | |
607 | } | |
7311bea3 | 608 | } |
a672b469 AL |
609 | } |
610 | ||
c6380724 | 611 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 612 | { |
c6380724 JQ |
613 | if (f->buf_index + size <= f->buf_size) { |
614 | f->buf_index += size; | |
615 | } | |
616 | } | |
617 | ||
618 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 619 | { |
c6380724 JQ |
620 | int pending; |
621 | int index; | |
a672b469 | 622 | |
b9ce1454 | 623 | if (f->is_write) { |
a672b469 | 624 | abort(); |
b9ce1454 | 625 | } |
a672b469 | 626 | |
c6380724 JQ |
627 | index = f->buf_index + offset; |
628 | pending = f->buf_size - index; | |
629 | if (pending < size) { | |
630 | qemu_fill_buffer(f); | |
631 | index = f->buf_index + offset; | |
632 | pending = f->buf_size - index; | |
633 | } | |
634 | ||
635 | if (pending <= 0) { | |
636 | return 0; | |
637 | } | |
638 | if (size > pending) { | |
639 | size = pending; | |
640 | } | |
641 | ||
642 | memcpy(buf, f->buf + index, size); | |
643 | return size; | |
644 | } | |
645 | ||
646 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
647 | { | |
648 | int pending = size; | |
649 | int done = 0; | |
650 | ||
651 | while (pending > 0) { | |
652 | int res; | |
653 | ||
654 | res = qemu_peek_buffer(f, buf, pending, 0); | |
655 | if (res == 0) { | |
656 | return done; | |
a672b469 | 657 | } |
c6380724 JQ |
658 | qemu_file_skip(f, res); |
659 | buf += res; | |
660 | pending -= res; | |
661 | done += res; | |
a672b469 | 662 | } |
c6380724 | 663 | return done; |
a672b469 AL |
664 | } |
665 | ||
c6380724 | 666 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 667 | { |
c6380724 JQ |
668 | int index = f->buf_index + offset; |
669 | ||
b9ce1454 | 670 | if (f->is_write) { |
811814bd | 671 | abort(); |
b9ce1454 | 672 | } |
811814bd | 673 | |
c6380724 | 674 | if (index >= f->buf_size) { |
811814bd | 675 | qemu_fill_buffer(f); |
c6380724 JQ |
676 | index = f->buf_index + offset; |
677 | if (index >= f->buf_size) { | |
811814bd | 678 | return 0; |
b9ce1454 | 679 | } |
811814bd | 680 | } |
c6380724 | 681 | return f->buf[index]; |
811814bd JQ |
682 | } |
683 | ||
a672b469 AL |
684 | int qemu_get_byte(QEMUFile *f) |
685 | { | |
65f3bb3d | 686 | int result; |
a672b469 | 687 | |
c6380724 JQ |
688 | result = qemu_peek_byte(f, 0); |
689 | qemu_file_skip(f, 1); | |
65f3bb3d | 690 | return result; |
a672b469 AL |
691 | } |
692 | ||
3aee4be1 | 693 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
694 | { |
695 | return f->buf_offset - f->buf_size + f->buf_index; | |
696 | } | |
697 | ||
a672b469 AL |
698 | int qemu_file_rate_limit(QEMUFile *f) |
699 | { | |
9229bf3c PB |
700 | if (f->ops->rate_limit) |
701 | return f->ops->rate_limit(f->opaque); | |
a672b469 AL |
702 | |
703 | return 0; | |
704 | } | |
705 | ||
3d002df3 | 706 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 707 | { |
9229bf3c PB |
708 | if (f->ops->get_rate_limit) |
709 | return f->ops->get_rate_limit(f->opaque); | |
c163b5ca | 710 | |
711 | return 0; | |
712 | } | |
713 | ||
3d002df3 | 714 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 715 | { |
0bb05eaf GC |
716 | /* any failed or completed migration keeps its state to allow probing of |
717 | * migration data, but has no associated file anymore */ | |
9229bf3c PB |
718 | if (f && f->ops->set_rate_limit) |
719 | return f->ops->set_rate_limit(f->opaque, new_rate); | |
19629537 GC |
720 | |
721 | return 0; | |
722 | } | |
723 | ||
a672b469 AL |
724 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
725 | { | |
726 | qemu_put_byte(f, v >> 8); | |
727 | qemu_put_byte(f, v); | |
728 | } | |
729 | ||
730 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
731 | { | |
732 | qemu_put_byte(f, v >> 24); | |
733 | qemu_put_byte(f, v >> 16); | |
734 | qemu_put_byte(f, v >> 8); | |
735 | qemu_put_byte(f, v); | |
736 | } | |
737 | ||
738 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
739 | { | |
740 | qemu_put_be32(f, v >> 32); | |
741 | qemu_put_be32(f, v); | |
742 | } | |
743 | ||
744 | unsigned int qemu_get_be16(QEMUFile *f) | |
745 | { | |
746 | unsigned int v; | |
747 | v = qemu_get_byte(f) << 8; | |
748 | v |= qemu_get_byte(f); | |
749 | return v; | |
750 | } | |
751 | ||
752 | unsigned int qemu_get_be32(QEMUFile *f) | |
753 | { | |
754 | unsigned int v; | |
755 | v = qemu_get_byte(f) << 24; | |
756 | v |= qemu_get_byte(f) << 16; | |
757 | v |= qemu_get_byte(f) << 8; | |
758 | v |= qemu_get_byte(f); | |
759 | return v; | |
760 | } | |
761 | ||
762 | uint64_t qemu_get_be64(QEMUFile *f) | |
763 | { | |
764 | uint64_t v; | |
765 | v = (uint64_t)qemu_get_be32(f) << 32; | |
766 | v |= qemu_get_be32(f); | |
767 | return v; | |
768 | } | |
769 | ||
2ff68d07 PB |
770 | |
771 | /* timer */ | |
772 | ||
773 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
774 | { | |
775 | uint64_t expire_time; | |
776 | ||
777 | expire_time = qemu_timer_expire_time_ns(ts); | |
778 | qemu_put_be64(f, expire_time); | |
779 | } | |
780 | ||
781 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
782 | { | |
783 | uint64_t expire_time; | |
784 | ||
785 | expire_time = qemu_get_be64(f); | |
786 | if (expire_time != -1) { | |
787 | qemu_mod_timer_ns(ts, expire_time); | |
788 | } else { | |
789 | qemu_del_timer(ts); | |
790 | } | |
791 | } | |
792 | ||
793 | ||
cdae5cfb GH |
794 | /* bool */ |
795 | ||
796 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
797 | { | |
798 | bool *v = pv; | |
799 | *v = qemu_get_byte(f); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
804 | { | |
805 | bool *v = pv; | |
806 | qemu_put_byte(f, *v); | |
807 | } | |
808 | ||
809 | const VMStateInfo vmstate_info_bool = { | |
810 | .name = "bool", | |
811 | .get = get_bool, | |
812 | .put = put_bool, | |
813 | }; | |
814 | ||
9ed7d6ae JQ |
815 | /* 8 bit int */ |
816 | ||
817 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
818 | { | |
819 | int8_t *v = pv; | |
820 | qemu_get_s8s(f, v); | |
821 | return 0; | |
822 | } | |
823 | ||
84e2e3eb | 824 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 825 | { |
84e2e3eb | 826 | int8_t *v = pv; |
9ed7d6ae JQ |
827 | qemu_put_s8s(f, v); |
828 | } | |
829 | ||
830 | const VMStateInfo vmstate_info_int8 = { | |
831 | .name = "int8", | |
832 | .get = get_int8, | |
833 | .put = put_int8, | |
834 | }; | |
835 | ||
836 | /* 16 bit int */ | |
837 | ||
838 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
839 | { | |
840 | int16_t *v = pv; | |
841 | qemu_get_sbe16s(f, v); | |
842 | return 0; | |
843 | } | |
844 | ||
84e2e3eb | 845 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 846 | { |
84e2e3eb | 847 | int16_t *v = pv; |
9ed7d6ae JQ |
848 | qemu_put_sbe16s(f, v); |
849 | } | |
850 | ||
851 | const VMStateInfo vmstate_info_int16 = { | |
852 | .name = "int16", | |
853 | .get = get_int16, | |
854 | .put = put_int16, | |
855 | }; | |
856 | ||
857 | /* 32 bit int */ | |
858 | ||
859 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
860 | { | |
861 | int32_t *v = pv; | |
862 | qemu_get_sbe32s(f, v); | |
863 | return 0; | |
864 | } | |
865 | ||
84e2e3eb | 866 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 867 | { |
84e2e3eb | 868 | int32_t *v = pv; |
9ed7d6ae JQ |
869 | qemu_put_sbe32s(f, v); |
870 | } | |
871 | ||
872 | const VMStateInfo vmstate_info_int32 = { | |
873 | .name = "int32", | |
874 | .get = get_int32, | |
875 | .put = put_int32, | |
876 | }; | |
877 | ||
82501660 JQ |
878 | /* 32 bit int. See that the received value is the same than the one |
879 | in the field */ | |
880 | ||
881 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
882 | { | |
883 | int32_t *v = pv; | |
884 | int32_t v2; | |
885 | qemu_get_sbe32s(f, &v2); | |
886 | ||
887 | if (*v == v2) | |
888 | return 0; | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | const VMStateInfo vmstate_info_int32_equal = { | |
893 | .name = "int32 equal", | |
894 | .get = get_int32_equal, | |
895 | .put = put_int32, | |
896 | }; | |
897 | ||
0a031e0a JQ |
898 | /* 32 bit int. See that the received value is the less or the same |
899 | than the one in the field */ | |
900 | ||
901 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
902 | { | |
903 | int32_t *old = pv; | |
904 | int32_t new; | |
905 | qemu_get_sbe32s(f, &new); | |
906 | ||
907 | if (*old <= new) | |
908 | return 0; | |
909 | return -EINVAL; | |
910 | } | |
911 | ||
912 | const VMStateInfo vmstate_info_int32_le = { | |
913 | .name = "int32 equal", | |
914 | .get = get_int32_le, | |
915 | .put = put_int32, | |
916 | }; | |
917 | ||
9ed7d6ae JQ |
918 | /* 64 bit int */ |
919 | ||
920 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
921 | { | |
922 | int64_t *v = pv; | |
923 | qemu_get_sbe64s(f, v); | |
924 | return 0; | |
925 | } | |
926 | ||
84e2e3eb | 927 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 928 | { |
84e2e3eb | 929 | int64_t *v = pv; |
9ed7d6ae JQ |
930 | qemu_put_sbe64s(f, v); |
931 | } | |
932 | ||
933 | const VMStateInfo vmstate_info_int64 = { | |
934 | .name = "int64", | |
935 | .get = get_int64, | |
936 | .put = put_int64, | |
937 | }; | |
938 | ||
939 | /* 8 bit unsigned int */ | |
940 | ||
941 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
942 | { | |
943 | uint8_t *v = pv; | |
944 | qemu_get_8s(f, v); | |
945 | return 0; | |
946 | } | |
947 | ||
84e2e3eb | 948 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 949 | { |
84e2e3eb | 950 | uint8_t *v = pv; |
9ed7d6ae JQ |
951 | qemu_put_8s(f, v); |
952 | } | |
953 | ||
954 | const VMStateInfo vmstate_info_uint8 = { | |
955 | .name = "uint8", | |
956 | .get = get_uint8, | |
957 | .put = put_uint8, | |
958 | }; | |
959 | ||
960 | /* 16 bit unsigned int */ | |
961 | ||
962 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
963 | { | |
964 | uint16_t *v = pv; | |
965 | qemu_get_be16s(f, v); | |
966 | return 0; | |
967 | } | |
968 | ||
84e2e3eb | 969 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 970 | { |
84e2e3eb | 971 | uint16_t *v = pv; |
9ed7d6ae JQ |
972 | qemu_put_be16s(f, v); |
973 | } | |
974 | ||
975 | const VMStateInfo vmstate_info_uint16 = { | |
976 | .name = "uint16", | |
977 | .get = get_uint16, | |
978 | .put = put_uint16, | |
979 | }; | |
980 | ||
981 | /* 32 bit unsigned int */ | |
982 | ||
983 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
984 | { | |
985 | uint32_t *v = pv; | |
986 | qemu_get_be32s(f, v); | |
987 | return 0; | |
988 | } | |
989 | ||
84e2e3eb | 990 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 991 | { |
84e2e3eb | 992 | uint32_t *v = pv; |
9ed7d6ae JQ |
993 | qemu_put_be32s(f, v); |
994 | } | |
995 | ||
996 | const VMStateInfo vmstate_info_uint32 = { | |
997 | .name = "uint32", | |
998 | .get = get_uint32, | |
999 | .put = put_uint32, | |
1000 | }; | |
1001 | ||
9122a8fe JQ |
1002 | /* 32 bit uint. See that the received value is the same than the one |
1003 | in the field */ | |
1004 | ||
1005 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1006 | { | |
1007 | uint32_t *v = pv; | |
1008 | uint32_t v2; | |
1009 | qemu_get_be32s(f, &v2); | |
1010 | ||
1011 | if (*v == v2) { | |
1012 | return 0; | |
1013 | } | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | ||
1017 | const VMStateInfo vmstate_info_uint32_equal = { | |
1018 | .name = "uint32 equal", | |
1019 | .get = get_uint32_equal, | |
1020 | .put = put_uint32, | |
1021 | }; | |
1022 | ||
9ed7d6ae JQ |
1023 | /* 64 bit unsigned int */ |
1024 | ||
1025 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1026 | { | |
1027 | uint64_t *v = pv; | |
1028 | qemu_get_be64s(f, v); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
84e2e3eb | 1032 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1033 | { |
84e2e3eb | 1034 | uint64_t *v = pv; |
9ed7d6ae JQ |
1035 | qemu_put_be64s(f, v); |
1036 | } | |
1037 | ||
1038 | const VMStateInfo vmstate_info_uint64 = { | |
1039 | .name = "uint64", | |
1040 | .get = get_uint64, | |
1041 | .put = put_uint64, | |
1042 | }; | |
1043 | ||
80cd83e7 JQ |
1044 | /* 8 bit int. See that the received value is the same than the one |
1045 | in the field */ | |
1046 | ||
1047 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1048 | { | |
1049 | uint8_t *v = pv; | |
1050 | uint8_t v2; | |
1051 | qemu_get_8s(f, &v2); | |
1052 | ||
1053 | if (*v == v2) | |
1054 | return 0; | |
1055 | return -EINVAL; | |
1056 | } | |
1057 | ||
1058 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1059 | .name = "uint8 equal", |
80cd83e7 JQ |
1060 | .get = get_uint8_equal, |
1061 | .put = put_uint8, | |
1062 | }; | |
1063 | ||
dc3b83a0 JQ |
1064 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1065 | in the field */ | |
1066 | ||
1067 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1068 | { | |
1069 | uint16_t *v = pv; | |
1070 | uint16_t v2; | |
1071 | qemu_get_be16s(f, &v2); | |
1072 | ||
1073 | if (*v == v2) | |
1074 | return 0; | |
1075 | return -EINVAL; | |
1076 | } | |
1077 | ||
1078 | const VMStateInfo vmstate_info_uint16_equal = { | |
1079 | .name = "uint16 equal", | |
1080 | .get = get_uint16_equal, | |
1081 | .put = put_uint16, | |
1082 | }; | |
1083 | ||
dde0463b JQ |
1084 | /* timers */ |
1085 | ||
1086 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1087 | { | |
1088 | QEMUTimer *v = pv; | |
1089 | qemu_get_timer(f, v); | |
1090 | return 0; | |
1091 | } | |
1092 | ||
84e2e3eb | 1093 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1094 | { |
84e2e3eb | 1095 | QEMUTimer *v = pv; |
dde0463b JQ |
1096 | qemu_put_timer(f, v); |
1097 | } | |
1098 | ||
1099 | const VMStateInfo vmstate_info_timer = { | |
1100 | .name = "timer", | |
1101 | .get = get_timer, | |
1102 | .put = put_timer, | |
1103 | }; | |
1104 | ||
6f67c50f JQ |
1105 | /* uint8_t buffers */ |
1106 | ||
1107 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1108 | { | |
1109 | uint8_t *v = pv; | |
1110 | qemu_get_buffer(f, v, size); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
84e2e3eb | 1114 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1115 | { |
84e2e3eb | 1116 | uint8_t *v = pv; |
6f67c50f JQ |
1117 | qemu_put_buffer(f, v, size); |
1118 | } | |
1119 | ||
1120 | const VMStateInfo vmstate_info_buffer = { | |
1121 | .name = "buffer", | |
1122 | .get = get_buffer, | |
1123 | .put = put_buffer, | |
1124 | }; | |
1125 | ||
76507c75 | 1126 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1127 | not useful anymore */ |
76507c75 JQ |
1128 | |
1129 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1130 | { | |
21174c34 JK |
1131 | uint8_t buf[1024]; |
1132 | int block_len; | |
1133 | ||
1134 | while (size > 0) { | |
1135 | block_len = MIN(sizeof(buf), size); | |
1136 | size -= block_len; | |
1137 | qemu_get_buffer(f, buf, block_len); | |
1138 | } | |
1139 | return 0; | |
76507c75 JQ |
1140 | } |
1141 | ||
1142 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1143 | { | |
21174c34 JK |
1144 | static const uint8_t buf[1024]; |
1145 | int block_len; | |
1146 | ||
1147 | while (size > 0) { | |
1148 | block_len = MIN(sizeof(buf), size); | |
1149 | size -= block_len; | |
1150 | qemu_put_buffer(f, buf, block_len); | |
1151 | } | |
76507c75 JQ |
1152 | } |
1153 | ||
1154 | const VMStateInfo vmstate_info_unused_buffer = { | |
1155 | .name = "unused_buffer", | |
1156 | .get = get_unused_buffer, | |
1157 | .put = put_unused_buffer, | |
1158 | }; | |
1159 | ||
08e99e29 PM |
1160 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1161 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1162 | * bit words with the bits in big endian order. The in-memory format | |
1163 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1164 | */ | |
1165 | /* This is the number of 64 bit words sent over the wire */ | |
1166 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1167 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1168 | { | |
1169 | unsigned long *bmp = pv; | |
1170 | int i, idx = 0; | |
1171 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1172 | uint64_t w = qemu_get_be64(f); | |
1173 | bmp[idx++] = w; | |
1174 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1175 | bmp[idx++] = w >> 32; | |
1176 | } | |
1177 | } | |
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1182 | { | |
1183 | unsigned long *bmp = pv; | |
1184 | int i, idx = 0; | |
1185 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1186 | uint64_t w = bmp[idx++]; | |
1187 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1188 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1189 | } | |
1190 | qemu_put_be64(f, w); | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | const VMStateInfo vmstate_info_bitmap = { | |
1195 | .name = "bitmap", | |
1196 | .get = get_bitmap, | |
1197 | .put = put_bitmap, | |
1198 | }; | |
1199 | ||
7685ee6a AW |
1200 | typedef struct CompatEntry { |
1201 | char idstr[256]; | |
1202 | int instance_id; | |
1203 | } CompatEntry; | |
1204 | ||
a672b469 | 1205 | typedef struct SaveStateEntry { |
72cf2d4f | 1206 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1207 | char idstr[256]; |
1208 | int instance_id; | |
4d2ffa08 | 1209 | int alias_id; |
a672b469 AL |
1210 | int version_id; |
1211 | int section_id; | |
22ea40f4 | 1212 | SaveVMHandlers *ops; |
9ed7d6ae | 1213 | const VMStateDescription *vmsd; |
a672b469 | 1214 | void *opaque; |
7685ee6a | 1215 | CompatEntry *compat; |
24312968 | 1216 | int no_migrate; |
a7ae8355 | 1217 | int is_ram; |
a672b469 AL |
1218 | } SaveStateEntry; |
1219 | ||
c163b5ca | 1220 | |
72cf2d4f BS |
1221 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1222 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1223 | static int global_section_id; |
a672b469 | 1224 | |
8718e999 JQ |
1225 | static int calculate_new_instance_id(const char *idstr) |
1226 | { | |
1227 | SaveStateEntry *se; | |
1228 | int instance_id = 0; | |
1229 | ||
72cf2d4f | 1230 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1231 | if (strcmp(idstr, se->idstr) == 0 |
1232 | && instance_id <= se->instance_id) { | |
1233 | instance_id = se->instance_id + 1; | |
1234 | } | |
1235 | } | |
1236 | return instance_id; | |
1237 | } | |
1238 | ||
7685ee6a AW |
1239 | static int calculate_compat_instance_id(const char *idstr) |
1240 | { | |
1241 | SaveStateEntry *se; | |
1242 | int instance_id = 0; | |
1243 | ||
1244 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1245 | if (!se->compat) | |
1246 | continue; | |
1247 | ||
1248 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1249 | && instance_id <= se->compat->instance_id) { | |
1250 | instance_id = se->compat->instance_id + 1; | |
1251 | } | |
1252 | } | |
1253 | return instance_id; | |
1254 | } | |
1255 | ||
a672b469 AL |
1256 | /* TODO: Individual devices generally have very little idea about the rest |
1257 | of the system, so instance_id should be removed/replaced. | |
1258 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1259 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1260 | int register_savevm_live(DeviceState *dev, |
1261 | const char *idstr, | |
a672b469 AL |
1262 | int instance_id, |
1263 | int version_id, | |
7908c78d | 1264 | SaveVMHandlers *ops, |
a672b469 AL |
1265 | void *opaque) |
1266 | { | |
8718e999 | 1267 | SaveStateEntry *se; |
a672b469 | 1268 | |
7267c094 | 1269 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1270 | se->version_id = version_id; |
1271 | se->section_id = global_section_id++; | |
7908c78d | 1272 | se->ops = ops; |
a672b469 | 1273 | se->opaque = opaque; |
9ed7d6ae | 1274 | se->vmsd = NULL; |
24312968 | 1275 | se->no_migrate = 0; |
a7ae8355 | 1276 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1277 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1278 | se->is_ram = 1; |
1279 | } | |
a672b469 | 1280 | |
09e5ab63 AL |
1281 | if (dev) { |
1282 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1283 | if (id) { |
1284 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1285 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1286 | g_free(id); |
7685ee6a | 1287 | |
7267c094 | 1288 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1289 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1290 | se->compat->instance_id = instance_id == -1 ? | |
1291 | calculate_compat_instance_id(idstr) : instance_id; | |
1292 | instance_id = -1; | |
1293 | } | |
1294 | } | |
1295 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1296 | ||
8718e999 | 1297 | if (instance_id == -1) { |
7685ee6a | 1298 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1299 | } else { |
1300 | se->instance_id = instance_id; | |
a672b469 | 1301 | } |
7685ee6a | 1302 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1303 | /* add at the end of list */ |
72cf2d4f | 1304 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1305 | return 0; |
1306 | } | |
1307 | ||
0be71e32 AW |
1308 | int register_savevm(DeviceState *dev, |
1309 | const char *idstr, | |
a672b469 AL |
1310 | int instance_id, |
1311 | int version_id, | |
1312 | SaveStateHandler *save_state, | |
1313 | LoadStateHandler *load_state, | |
1314 | void *opaque) | |
1315 | { | |
7908c78d JQ |
1316 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1317 | ops->save_state = save_state; | |
1318 | ops->load_state = load_state; | |
0be71e32 | 1319 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1320 | ops, opaque); |
a672b469 AL |
1321 | } |
1322 | ||
0be71e32 | 1323 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1324 | { |
8718e999 | 1325 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1326 | char id[256] = ""; |
1327 | ||
09e5ab63 AL |
1328 | if (dev) { |
1329 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1330 | if (path) { |
1331 | pstrcpy(id, sizeof(id), path); | |
1332 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1333 | g_free(path); |
7685ee6a AW |
1334 | } |
1335 | } | |
1336 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1337 | |
72cf2d4f | 1338 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1339 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1340 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1341 | if (se->compat) { |
7267c094 | 1342 | g_free(se->compat); |
69e58af9 | 1343 | } |
22ea40f4 | 1344 | g_free(se->ops); |
7267c094 | 1345 | g_free(se); |
41bd13af | 1346 | } |
41bd13af AL |
1347 | } |
1348 | } | |
1349 | ||
0be71e32 | 1350 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1351 | const VMStateDescription *vmsd, |
1352 | void *opaque, int alias_id, | |
1353 | int required_for_version) | |
9ed7d6ae | 1354 | { |
8718e999 | 1355 | SaveStateEntry *se; |
9ed7d6ae | 1356 | |
4d2ffa08 JK |
1357 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1358 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1359 | ||
7267c094 | 1360 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1361 | se->version_id = vmsd->version_id; |
1362 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1363 | se->opaque = opaque; |
1364 | se->vmsd = vmsd; | |
4d2ffa08 | 1365 | se->alias_id = alias_id; |
2837c8ea | 1366 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1367 | |
09e5ab63 AL |
1368 | if (dev) { |
1369 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1370 | if (id) { |
1371 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1372 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1373 | g_free(id); |
7685ee6a | 1374 | |
7267c094 | 1375 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1376 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1377 | se->compat->instance_id = instance_id == -1 ? | |
1378 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1379 | instance_id = -1; | |
1380 | } | |
1381 | } | |
1382 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1383 | ||
8718e999 | 1384 | if (instance_id == -1) { |
7685ee6a | 1385 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1386 | } else { |
1387 | se->instance_id = instance_id; | |
9ed7d6ae | 1388 | } |
7685ee6a | 1389 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1390 | /* add at the end of list */ |
72cf2d4f | 1391 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1392 | return 0; |
1393 | } | |
1394 | ||
0be71e32 AW |
1395 | int vmstate_register(DeviceState *dev, int instance_id, |
1396 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1397 | { |
0be71e32 AW |
1398 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1399 | opaque, -1, 0); | |
4d2ffa08 JK |
1400 | } |
1401 | ||
0be71e32 AW |
1402 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1403 | void *opaque) | |
9ed7d6ae | 1404 | { |
1eb7538b JQ |
1405 | SaveStateEntry *se, *new_se; |
1406 | ||
72cf2d4f | 1407 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1408 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1409 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1410 | if (se->compat) { |
7267c094 | 1411 | g_free(se->compat); |
69e58af9 | 1412 | } |
7267c094 | 1413 | g_free(se); |
1eb7538b JQ |
1414 | } |
1415 | } | |
9ed7d6ae JQ |
1416 | } |
1417 | ||
811814bd JQ |
1418 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1419 | void *opaque); | |
1420 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1421 | void *opaque); | |
1422 | ||
9ed7d6ae JQ |
1423 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1424 | void *opaque, int version_id) | |
1425 | { | |
1426 | VMStateField *field = vmsd->fields; | |
811814bd | 1427 | int ret; |
9ed7d6ae JQ |
1428 | |
1429 | if (version_id > vmsd->version_id) { | |
1430 | return -EINVAL; | |
1431 | } | |
1432 | if (version_id < vmsd->minimum_version_id_old) { | |
1433 | return -EINVAL; | |
1434 | } | |
1435 | if (version_id < vmsd->minimum_version_id) { | |
1436 | return vmsd->load_state_old(f, opaque, version_id); | |
1437 | } | |
fd4d52de JQ |
1438 | if (vmsd->pre_load) { |
1439 | int ret = vmsd->pre_load(opaque); | |
1440 | if (ret) | |
1441 | return ret; | |
1442 | } | |
9ed7d6ae | 1443 | while(field->name) { |
f11f6a5f JQ |
1444 | if ((field->field_exists && |
1445 | field->field_exists(opaque, version_id)) || | |
1446 | (!field->field_exists && | |
1447 | field->version_id <= version_id)) { | |
f752a6aa | 1448 | void *base_addr = opaque + field->offset; |
811814bd | 1449 | int i, n_elems = 1; |
e61a1e0a | 1450 | int size = field->size; |
9ed7d6ae | 1451 | |
e61a1e0a JQ |
1452 | if (field->flags & VMS_VBUFFER) { |
1453 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1454 | if (field->flags & VMS_MULTIPLY) { |
1455 | size *= field->size; | |
1456 | } | |
e61a1e0a | 1457 | } |
f752a6aa JQ |
1458 | if (field->flags & VMS_ARRAY) { |
1459 | n_elems = field->num; | |
d6698281 JQ |
1460 | } else if (field->flags & VMS_VARRAY_INT32) { |
1461 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1462 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1463 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1464 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1465 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1466 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1467 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1468 | } |
dde0463b | 1469 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1470 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1471 | } |
f752a6aa | 1472 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1473 | void *addr = base_addr + size * i; |
ec245e21 | 1474 | |
19df438b JQ |
1475 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1476 | addr = *(void **)addr; | |
1477 | } | |
ec245e21 | 1478 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1479 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1480 | } else { |
e61a1e0a | 1481 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1482 | |
1483 | } | |
f752a6aa JQ |
1484 | if (ret < 0) { |
1485 | return ret; | |
1486 | } | |
9ed7d6ae JQ |
1487 | } |
1488 | } | |
1489 | field++; | |
1490 | } | |
811814bd JQ |
1491 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1492 | if (ret != 0) { | |
1493 | return ret; | |
1494 | } | |
752ff2fa | 1495 | if (vmsd->post_load) { |
e59fb374 | 1496 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1497 | } |
9ed7d6ae JQ |
1498 | return 0; |
1499 | } | |
1500 | ||
1501 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1502 | void *opaque) |
9ed7d6ae JQ |
1503 | { |
1504 | VMStateField *field = vmsd->fields; | |
1505 | ||
8fb0791d JQ |
1506 | if (vmsd->pre_save) { |
1507 | vmsd->pre_save(opaque); | |
1508 | } | |
9ed7d6ae | 1509 | while(field->name) { |
f11f6a5f JQ |
1510 | if (!field->field_exists || |
1511 | field->field_exists(opaque, vmsd->version_id)) { | |
1512 | void *base_addr = opaque + field->offset; | |
1513 | int i, n_elems = 1; | |
e61a1e0a | 1514 | int size = field->size; |
dde0463b | 1515 | |
e61a1e0a JQ |
1516 | if (field->flags & VMS_VBUFFER) { |
1517 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1518 | if (field->flags & VMS_MULTIPLY) { |
1519 | size *= field->size; | |
1520 | } | |
e61a1e0a | 1521 | } |
f11f6a5f JQ |
1522 | if (field->flags & VMS_ARRAY) { |
1523 | n_elems = field->num; | |
d6698281 JQ |
1524 | } else if (field->flags & VMS_VARRAY_INT32) { |
1525 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1526 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1527 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1528 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1529 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1530 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1531 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1532 | } |
1533 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1534 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1535 | } |
1536 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1537 | void *addr = base_addr + size * i; |
ec245e21 | 1538 | |
8595387e JQ |
1539 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1540 | addr = *(void **)addr; | |
1541 | } | |
f11f6a5f JQ |
1542 | if (field->flags & VMS_STRUCT) { |
1543 | vmstate_save_state(f, field->vmsd, addr); | |
1544 | } else { | |
e61a1e0a | 1545 | field->info->put(f, addr, size); |
f11f6a5f | 1546 | } |
ec245e21 | 1547 | } |
dde0463b | 1548 | } |
9ed7d6ae JQ |
1549 | field++; |
1550 | } | |
811814bd | 1551 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1552 | } |
1553 | ||
4082be4d JQ |
1554 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1555 | { | |
9ed7d6ae | 1556 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1557 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1558 | } |
1559 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1560 | } |
1561 | ||
dc912121 | 1562 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1563 | { |
9ed7d6ae | 1564 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1565 | se->ops->save_state(f, se->opaque); |
dc912121 | 1566 | return; |
9ed7d6ae JQ |
1567 | } |
1568 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1569 | } |
1570 | ||
a672b469 AL |
1571 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1572 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1573 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1574 | ||
1575 | #define QEMU_VM_EOF 0x00 | |
1576 | #define QEMU_VM_SECTION_START 0x01 | |
1577 | #define QEMU_VM_SECTION_PART 0x02 | |
1578 | #define QEMU_VM_SECTION_END 0x03 | |
1579 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1580 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1581 | |
e1c37d0e | 1582 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1583 | { |
1584 | SaveStateEntry *se; | |
1585 | ||
1586 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1587 | if (se->no_migrate) { | |
e1c37d0e | 1588 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1589 | return true; |
1590 | } | |
1591 | } | |
1592 | return false; | |
1593 | } | |
1594 | ||
6607ae23 IY |
1595 | int qemu_savevm_state_begin(QEMUFile *f, |
1596 | const MigrationParams *params) | |
a672b469 AL |
1597 | { |
1598 | SaveStateEntry *se; | |
39346385 | 1599 | int ret; |
a672b469 | 1600 | |
c163b5ca | 1601 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1602 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1603 | continue; |
6607ae23 | 1604 | } |
22ea40f4 | 1605 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1606 | } |
1607 | ||
a672b469 AL |
1608 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1609 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1610 | ||
72cf2d4f | 1611 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1612 | int len; |
1613 | ||
d1315aac | 1614 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1615 | continue; |
22ea40f4 | 1616 | } |
6bd68781 JQ |
1617 | if (se->ops && se->ops->is_active) { |
1618 | if (!se->ops->is_active(se->opaque)) { | |
1619 | continue; | |
1620 | } | |
1621 | } | |
a672b469 AL |
1622 | /* Section type */ |
1623 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1624 | qemu_put_be32(f, se->section_id); | |
1625 | ||
1626 | /* ID string */ | |
1627 | len = strlen(se->idstr); | |
1628 | qemu_put_byte(f, len); | |
1629 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1630 | ||
1631 | qemu_put_be32(f, se->instance_id); | |
1632 | qemu_put_be32(f, se->version_id); | |
1633 | ||
d1315aac | 1634 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1635 | if (ret < 0) { |
539de124 | 1636 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1637 | return ret; |
1638 | } | |
a672b469 | 1639 | } |
624b9cc2 | 1640 | ret = qemu_file_get_error(f); |
39346385 | 1641 | if (ret != 0) { |
539de124 | 1642 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1643 | } |
a672b469 | 1644 | |
39346385 JQ |
1645 | return ret; |
1646 | ||
a672b469 AL |
1647 | } |
1648 | ||
39346385 | 1649 | /* |
07f35073 | 1650 | * this function has three return values: |
39346385 JQ |
1651 | * negative: there was one error, and we have -errno. |
1652 | * 0 : We haven't finished, caller have to go again | |
1653 | * 1 : We have finished, we can go to complete phase | |
1654 | */ | |
539de124 | 1655 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1656 | { |
1657 | SaveStateEntry *se; | |
1658 | int ret = 1; | |
1659 | ||
72cf2d4f | 1660 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1661 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1662 | continue; |
22ea40f4 | 1663 | } |
6bd68781 JQ |
1664 | if (se->ops && se->ops->is_active) { |
1665 | if (!se->ops->is_active(se->opaque)) { | |
1666 | continue; | |
1667 | } | |
1668 | } | |
aac844ed JQ |
1669 | if (qemu_file_rate_limit(f)) { |
1670 | return 0; | |
1671 | } | |
517a13c9 | 1672 | trace_savevm_section_start(); |
a672b469 AL |
1673 | /* Section type */ |
1674 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1675 | qemu_put_be32(f, se->section_id); | |
1676 | ||
16310a3c | 1677 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1678 | trace_savevm_section_end(se->section_id); |
1679 | ||
2975725f | 1680 | if (ret <= 0) { |
90697be8 JK |
1681 | /* Do not proceed to the next vmstate before this one reported |
1682 | completion of the current stage. This serializes the migration | |
1683 | and reduces the probability that a faster changing state is | |
1684 | synchronized over and over again. */ | |
1685 | break; | |
1686 | } | |
a672b469 | 1687 | } |
39346385 JQ |
1688 | if (ret != 0) { |
1689 | return ret; | |
1690 | } | |
624b9cc2 | 1691 | ret = qemu_file_get_error(f); |
39346385 | 1692 | if (ret != 0) { |
539de124 | 1693 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1694 | } |
39346385 | 1695 | return ret; |
a672b469 AL |
1696 | } |
1697 | ||
539de124 | 1698 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1699 | { |
1700 | SaveStateEntry *se; | |
2975725f | 1701 | int ret; |
a672b469 | 1702 | |
ea375f9a JK |
1703 | cpu_synchronize_all_states(); |
1704 | ||
72cf2d4f | 1705 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1706 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1707 | continue; |
22ea40f4 | 1708 | } |
6bd68781 JQ |
1709 | if (se->ops && se->ops->is_active) { |
1710 | if (!se->ops->is_active(se->opaque)) { | |
1711 | continue; | |
1712 | } | |
1713 | } | |
517a13c9 | 1714 | trace_savevm_section_start(); |
a672b469 AL |
1715 | /* Section type */ |
1716 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1717 | qemu_put_be32(f, se->section_id); | |
1718 | ||
16310a3c | 1719 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1720 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1721 | if (ret < 0) { |
1722 | return ret; | |
1723 | } | |
a672b469 AL |
1724 | } |
1725 | ||
72cf2d4f | 1726 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1727 | int len; |
1728 | ||
22ea40f4 | 1729 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1730 | continue; |
22ea40f4 | 1731 | } |
517a13c9 | 1732 | trace_savevm_section_start(); |
a672b469 AL |
1733 | /* Section type */ |
1734 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1735 | qemu_put_be32(f, se->section_id); | |
1736 | ||
1737 | /* ID string */ | |
1738 | len = strlen(se->idstr); | |
1739 | qemu_put_byte(f, len); | |
1740 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1741 | ||
1742 | qemu_put_be32(f, se->instance_id); | |
1743 | qemu_put_be32(f, se->version_id); | |
1744 | ||
dc912121 | 1745 | vmstate_save(f, se); |
517a13c9 | 1746 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1747 | } |
1748 | ||
1749 | qemu_put_byte(f, QEMU_VM_EOF); | |
1750 | ||
624b9cc2 | 1751 | return qemu_file_get_error(f); |
a672b469 AL |
1752 | } |
1753 | ||
539de124 | 1754 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1755 | { |
1756 | SaveStateEntry *se; | |
1757 | ||
1758 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1759 | if (se->ops && se->ops->cancel) { |
1760 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1761 | } |
1762 | } | |
1763 | } | |
1764 | ||
e1c37d0e | 1765 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1766 | { |
a672b469 | 1767 | int ret; |
6607ae23 IY |
1768 | MigrationParams params = { |
1769 | .blk = 0, | |
1770 | .shared = 0 | |
1771 | }; | |
a672b469 | 1772 | |
e1c37d0e | 1773 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1774 | ret = -EINVAL; |
1775 | goto out; | |
1776 | } | |
1777 | ||
6607ae23 | 1778 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1779 | if (ret < 0) |
1780 | goto out; | |
1781 | ||
1782 | do { | |
539de124 | 1783 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1784 | if (ret < 0) |
1785 | goto out; | |
1786 | } while (ret == 0); | |
1787 | ||
539de124 | 1788 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1789 | |
1790 | out: | |
39346385 | 1791 | if (ret == 0) { |
624b9cc2 | 1792 | ret = qemu_file_get_error(f); |
39346385 | 1793 | } |
a672b469 | 1794 | |
a672b469 AL |
1795 | return ret; |
1796 | } | |
1797 | ||
a7ae8355 SS |
1798 | static int qemu_save_device_state(QEMUFile *f) |
1799 | { | |
1800 | SaveStateEntry *se; | |
1801 | ||
1802 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1803 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1804 | ||
1805 | cpu_synchronize_all_states(); | |
1806 | ||
1807 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1808 | int len; | |
1809 | ||
1810 | if (se->is_ram) { | |
1811 | continue; | |
1812 | } | |
22ea40f4 | 1813 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1814 | continue; |
1815 | } | |
1816 | ||
1817 | /* Section type */ | |
1818 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1819 | qemu_put_be32(f, se->section_id); | |
1820 | ||
1821 | /* ID string */ | |
1822 | len = strlen(se->idstr); | |
1823 | qemu_put_byte(f, len); | |
1824 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1825 | ||
1826 | qemu_put_be32(f, se->instance_id); | |
1827 | qemu_put_be32(f, se->version_id); | |
1828 | ||
1829 | vmstate_save(f, se); | |
1830 | } | |
1831 | ||
1832 | qemu_put_byte(f, QEMU_VM_EOF); | |
1833 | ||
1834 | return qemu_file_get_error(f); | |
1835 | } | |
1836 | ||
a672b469 AL |
1837 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1838 | { | |
1839 | SaveStateEntry *se; | |
1840 | ||
72cf2d4f | 1841 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1842 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1843 | (instance_id == se->instance_id || |
1844 | instance_id == se->alias_id)) | |
a672b469 | 1845 | return se; |
7685ee6a AW |
1846 | /* Migrating from an older version? */ |
1847 | if (strstr(se->idstr, idstr) && se->compat) { | |
1848 | if (!strcmp(se->compat->idstr, idstr) && | |
1849 | (instance_id == se->compat->instance_id || | |
1850 | instance_id == se->alias_id)) | |
1851 | return se; | |
1852 | } | |
a672b469 AL |
1853 | } |
1854 | return NULL; | |
1855 | } | |
1856 | ||
811814bd JQ |
1857 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1858 | { | |
1859 | while(sub && sub->needed) { | |
1860 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1861 | return sub->vmsd; | |
1862 | } | |
1863 | sub++; | |
1864 | } | |
1865 | return NULL; | |
1866 | } | |
1867 | ||
1868 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1869 | void *opaque) | |
1870 | { | |
c6380724 | 1871 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1872 | char idstr[256]; |
1873 | int ret; | |
c6380724 | 1874 | uint8_t version_id, len, size; |
811814bd JQ |
1875 | const VMStateDescription *sub_vmsd; |
1876 | ||
c6380724 JQ |
1877 | len = qemu_peek_byte(f, 1); |
1878 | if (len < strlen(vmsd->name) + 1) { | |
1879 | /* subsection name has be be "section_name/a" */ | |
1880 | return 0; | |
1881 | } | |
1882 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1883 | if (size != len) { | |
1884 | return 0; | |
1885 | } | |
1886 | idstr[size] = 0; | |
811814bd | 1887 | |
c6380724 JQ |
1888 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1889 | /* it don't have a valid subsection name */ | |
1890 | return 0; | |
1891 | } | |
3da9eebd | 1892 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1893 | if (sub_vmsd == NULL) { |
1894 | return -ENOENT; | |
1895 | } | |
c6380724 JQ |
1896 | qemu_file_skip(f, 1); /* subsection */ |
1897 | qemu_file_skip(f, 1); /* len */ | |
1898 | qemu_file_skip(f, len); /* idstr */ | |
1899 | version_id = qemu_get_be32(f); | |
1900 | ||
811814bd JQ |
1901 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1902 | if (ret) { | |
1903 | return ret; | |
1904 | } | |
1905 | } | |
1906 | return 0; | |
1907 | } | |
1908 | ||
1909 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1910 | void *opaque) | |
1911 | { | |
1912 | const VMStateSubsection *sub = vmsd->subsections; | |
1913 | ||
1914 | while (sub && sub->needed) { | |
1915 | if (sub->needed(opaque)) { | |
1916 | const VMStateDescription *vmsd = sub->vmsd; | |
1917 | uint8_t len; | |
1918 | ||
1919 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1920 | len = strlen(vmsd->name); | |
1921 | qemu_put_byte(f, len); | |
1922 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1923 | qemu_put_be32(f, vmsd->version_id); | |
1924 | vmstate_save_state(f, vmsd, opaque); | |
1925 | } | |
1926 | sub++; | |
1927 | } | |
1928 | } | |
1929 | ||
a672b469 | 1930 | typedef struct LoadStateEntry { |
72cf2d4f | 1931 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1932 | SaveStateEntry *se; |
1933 | int section_id; | |
1934 | int version_id; | |
a672b469 AL |
1935 | } LoadStateEntry; |
1936 | ||
a672b469 AL |
1937 | int qemu_loadvm_state(QEMUFile *f) |
1938 | { | |
72cf2d4f BS |
1939 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1940 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1941 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1942 | uint8_t section_type; |
1943 | unsigned int v; | |
1944 | int ret; | |
1945 | ||
e1c37d0e | 1946 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1947 | return -EINVAL; |
1948 | } | |
1949 | ||
a672b469 AL |
1950 | v = qemu_get_be32(f); |
1951 | if (v != QEMU_VM_FILE_MAGIC) | |
1952 | return -EINVAL; | |
1953 | ||
1954 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1955 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1956 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1957 | return -ENOTSUP; | |
1958 | } | |
a672b469 AL |
1959 | if (v != QEMU_VM_FILE_VERSION) |
1960 | return -ENOTSUP; | |
1961 | ||
1962 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1963 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1964 | SaveStateEntry *se; |
1965 | char idstr[257]; | |
1966 | int len; | |
1967 | ||
1968 | switch (section_type) { | |
1969 | case QEMU_VM_SECTION_START: | |
1970 | case QEMU_VM_SECTION_FULL: | |
1971 | /* Read section start */ | |
1972 | section_id = qemu_get_be32(f); | |
1973 | len = qemu_get_byte(f); | |
1974 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1975 | idstr[len] = 0; | |
1976 | instance_id = qemu_get_be32(f); | |
1977 | version_id = qemu_get_be32(f); | |
1978 | ||
1979 | /* Find savevm section */ | |
1980 | se = find_se(idstr, instance_id); | |
1981 | if (se == NULL) { | |
1982 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1983 | ret = -EINVAL; | |
1984 | goto out; | |
1985 | } | |
1986 | ||
1987 | /* Validate version */ | |
1988 | if (version_id > se->version_id) { | |
1989 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1990 | version_id, idstr, se->version_id); | |
1991 | ret = -EINVAL; | |
1992 | goto out; | |
1993 | } | |
1994 | ||
1995 | /* Add entry */ | |
7267c094 | 1996 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1997 | |
1998 | le->se = se; | |
1999 | le->section_id = section_id; | |
2000 | le->version_id = version_id; | |
72cf2d4f | 2001 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2002 | |
4082be4d | 2003 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2004 | if (ret < 0) { |
2005 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2006 | instance_id, idstr); | |
2007 | goto out; | |
2008 | } | |
a672b469 AL |
2009 | break; |
2010 | case QEMU_VM_SECTION_PART: | |
2011 | case QEMU_VM_SECTION_END: | |
2012 | section_id = qemu_get_be32(f); | |
2013 | ||
72cf2d4f | 2014 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2015 | if (le->section_id == section_id) { |
2016 | break; | |
2017 | } | |
2018 | } | |
a672b469 AL |
2019 | if (le == NULL) { |
2020 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2021 | ret = -EINVAL; | |
2022 | goto out; | |
2023 | } | |
2024 | ||
4082be4d | 2025 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2026 | if (ret < 0) { |
2027 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2028 | section_id); | |
2029 | goto out; | |
2030 | } | |
a672b469 AL |
2031 | break; |
2032 | default: | |
2033 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2034 | ret = -EINVAL; | |
2035 | goto out; | |
2036 | } | |
2037 | } | |
2038 | ||
ea375f9a JK |
2039 | cpu_synchronize_all_post_init(); |
2040 | ||
a672b469 AL |
2041 | ret = 0; |
2042 | ||
2043 | out: | |
72cf2d4f BS |
2044 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2045 | QLIST_REMOVE(le, entry); | |
7267c094 | 2046 | g_free(le); |
a672b469 AL |
2047 | } |
2048 | ||
42802d47 JQ |
2049 | if (ret == 0) { |
2050 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2051 | } |
a672b469 AL |
2052 | |
2053 | return ret; | |
2054 | } | |
2055 | ||
a672b469 AL |
2056 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2057 | const char *name) | |
2058 | { | |
2059 | QEMUSnapshotInfo *sn_tab, *sn; | |
2060 | int nb_sns, i, ret; | |
2061 | ||
2062 | ret = -ENOENT; | |
2063 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2064 | if (nb_sns < 0) | |
2065 | return ret; | |
2066 | for(i = 0; i < nb_sns; i++) { | |
2067 | sn = &sn_tab[i]; | |
2068 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2069 | *sn_info = *sn; | |
2070 | ret = 0; | |
2071 | break; | |
2072 | } | |
2073 | } | |
7267c094 | 2074 | g_free(sn_tab); |
a672b469 AL |
2075 | return ret; |
2076 | } | |
2077 | ||
cb499fb2 KW |
2078 | /* |
2079 | * Deletes snapshots of a given name in all opened images. | |
2080 | */ | |
2081 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2082 | { | |
2083 | BlockDriverState *bs; | |
cb499fb2 KW |
2084 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2085 | int ret; | |
2086 | ||
dbc13590 MA |
2087 | bs = NULL; |
2088 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2089 | if (bdrv_can_snapshot(bs) && |
2090 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2091 | { | |
2092 | ret = bdrv_snapshot_delete(bs, name); | |
2093 | if (ret < 0) { | |
2094 | monitor_printf(mon, | |
2095 | "Error while deleting snapshot on '%s'\n", | |
2096 | bdrv_get_device_name(bs)); | |
2097 | return -1; | |
2098 | } | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | return 0; | |
2103 | } | |
2104 | ||
d54908a5 | 2105 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2106 | { |
2107 | BlockDriverState *bs, *bs1; | |
2108 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2109 | int ret; |
a672b469 AL |
2110 | QEMUFile *f; |
2111 | int saved_vm_running; | |
c2c9a466 | 2112 | uint64_t vm_state_size; |
a672b469 AL |
2113 | #ifdef _WIN32 |
2114 | struct _timeb tb; | |
7d631a11 | 2115 | struct tm *ptm; |
a672b469 AL |
2116 | #else |
2117 | struct timeval tv; | |
7d631a11 | 2118 | struct tm tm; |
a672b469 | 2119 | #endif |
d54908a5 | 2120 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2121 | |
feeee5ac | 2122 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2123 | bs = NULL; |
2124 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2125 | |
07b70bfb | 2126 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2127 | continue; |
2128 | } | |
2129 | ||
2130 | if (!bdrv_can_snapshot(bs)) { | |
2131 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2132 | bdrv_get_device_name(bs)); | |
2133 | return; | |
2134 | } | |
2135 | } | |
2136 | ||
f9092b10 | 2137 | bs = bdrv_snapshots(); |
a672b469 | 2138 | if (!bs) { |
376253ec | 2139 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2140 | return; |
2141 | } | |
a672b469 | 2142 | |
1354869c | 2143 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2144 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2145 | |
cb499fb2 | 2146 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2147 | |
2148 | /* fill auxiliary fields */ | |
2149 | #ifdef _WIN32 | |
2150 | _ftime(&tb); | |
2151 | sn->date_sec = tb.time; | |
2152 | sn->date_nsec = tb.millitm * 1000000; | |
2153 | #else | |
2154 | gettimeofday(&tv, NULL); | |
2155 | sn->date_sec = tv.tv_sec; | |
2156 | sn->date_nsec = tv.tv_usec * 1000; | |
2157 | #endif | |
74475455 | 2158 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2159 | |
7d631a11 MDCF |
2160 | if (name) { |
2161 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2162 | if (ret >= 0) { | |
2163 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2164 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2165 | } else { | |
2166 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2167 | } | |
2168 | } else { | |
2169 | #ifdef _WIN32 | |
55dd9ffa SW |
2170 | time_t t = tb.time; |
2171 | ptm = localtime(&t); | |
7d631a11 MDCF |
2172 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2173 | #else | |
d7d9b528 BS |
2174 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2175 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2176 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2177 | #endif | |
2178 | } | |
2179 | ||
cb499fb2 | 2180 | /* Delete old snapshots of the same name */ |
f139a412 | 2181 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2182 | goto the_end; |
2183 | } | |
2184 | ||
a672b469 | 2185 | /* save the VM state */ |
45566e9c | 2186 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2187 | if (!f) { |
376253ec | 2188 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2189 | goto the_end; |
2190 | } | |
e1c37d0e | 2191 | ret = qemu_savevm_state(f); |
2d22b18f | 2192 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2193 | qemu_fclose(f); |
2194 | if (ret < 0) { | |
376253ec | 2195 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2196 | goto the_end; |
2197 | } | |
2198 | ||
2199 | /* create the snapshots */ | |
2200 | ||
dbc13590 MA |
2201 | bs1 = NULL; |
2202 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2203 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2204 | /* Write VM state size only to the image that contains the state */ |
2205 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2206 | ret = bdrv_snapshot_create(bs1, sn); |
2207 | if (ret < 0) { | |
376253ec AL |
2208 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2209 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2210 | } |
2211 | } | |
2212 | } | |
2213 | ||
2214 | the_end: | |
2215 | if (saved_vm_running) | |
2216 | vm_start(); | |
2217 | } | |
2218 | ||
a7ae8355 SS |
2219 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2220 | { | |
2221 | QEMUFile *f; | |
2222 | int saved_vm_running; | |
2223 | int ret; | |
2224 | ||
2225 | saved_vm_running = runstate_is_running(); | |
2226 | vm_stop(RUN_STATE_SAVE_VM); | |
2227 | ||
2228 | f = qemu_fopen(filename, "wb"); | |
2229 | if (!f) { | |
2230 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2231 | goto the_end; | |
2232 | } | |
2233 | ret = qemu_save_device_state(f); | |
2234 | qemu_fclose(f); | |
2235 | if (ret < 0) { | |
2236 | error_set(errp, QERR_IO_ERROR); | |
2237 | } | |
2238 | ||
2239 | the_end: | |
2240 | if (saved_vm_running) | |
2241 | vm_start(); | |
a7ae8355 SS |
2242 | } |
2243 | ||
03cd4655 | 2244 | int load_vmstate(const char *name) |
a672b469 | 2245 | { |
f0aa7a8b | 2246 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2247 | QEMUSnapshotInfo sn; |
a672b469 | 2248 | QEMUFile *f; |
751c6a17 | 2249 | int ret; |
a672b469 | 2250 | |
f0aa7a8b MDCF |
2251 | bs_vm_state = bdrv_snapshots(); |
2252 | if (!bs_vm_state) { | |
2253 | error_report("No block device supports snapshots"); | |
2254 | return -ENOTSUP; | |
2255 | } | |
2256 | ||
2257 | /* Don't even try to load empty VM states */ | |
2258 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2259 | if (ret < 0) { | |
2260 | return ret; | |
2261 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2262 | error_report("This is a disk-only snapshot. Revert to it offline " |
2263 | "using qemu-img."); | |
f0aa7a8b MDCF |
2264 | return -EINVAL; |
2265 | } | |
2266 | ||
2267 | /* Verify if there is any device that doesn't support snapshots and is | |
2268 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2269 | bs = NULL; |
2270 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2271 | |
07b70bfb | 2272 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2273 | continue; |
2274 | } | |
2275 | ||
2276 | if (!bdrv_can_snapshot(bs)) { | |
2277 | error_report("Device '%s' is writable but does not support snapshots.", | |
2278 | bdrv_get_device_name(bs)); | |
2279 | return -ENOTSUP; | |
2280 | } | |
feeee5ac | 2281 | |
f0aa7a8b MDCF |
2282 | ret = bdrv_snapshot_find(bs, &sn, name); |
2283 | if (ret < 0) { | |
2284 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2285 | bdrv_get_device_name(bs), name); | |
2286 | return ret; | |
2287 | } | |
a672b469 AL |
2288 | } |
2289 | ||
2290 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2291 | bdrv_drain_all(); |
a672b469 | 2292 | |
f0aa7a8b MDCF |
2293 | bs = NULL; |
2294 | while ((bs = bdrv_next(bs))) { | |
2295 | if (bdrv_can_snapshot(bs)) { | |
2296 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2297 | if (ret < 0) { |
f0aa7a8b MDCF |
2298 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2299 | ret, name, bdrv_get_device_name(bs)); | |
2300 | return ret; | |
a672b469 AL |
2301 | } |
2302 | } | |
2303 | } | |
2304 | ||
a672b469 | 2305 | /* restore the VM state */ |
f0aa7a8b | 2306 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2307 | if (!f) { |
1ecda02b | 2308 | error_report("Could not open VM state file"); |
05f2401e | 2309 | return -EINVAL; |
a672b469 | 2310 | } |
f0aa7a8b | 2311 | |
5a8a49d7 | 2312 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2313 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2314 | |
a672b469 AL |
2315 | qemu_fclose(f); |
2316 | if (ret < 0) { | |
1ecda02b | 2317 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2318 | return ret; |
a672b469 | 2319 | } |
f0aa7a8b | 2320 | |
05f2401e | 2321 | return 0; |
7b630349 JQ |
2322 | } |
2323 | ||
d54908a5 | 2324 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2325 | { |
2326 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2327 | int ret; |
d54908a5 | 2328 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2329 | |
f9092b10 | 2330 | bs = bdrv_snapshots(); |
a672b469 | 2331 | if (!bs) { |
376253ec | 2332 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2333 | return; |
2334 | } | |
2335 | ||
dbc13590 MA |
2336 | bs1 = NULL; |
2337 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2338 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2339 | ret = bdrv_snapshot_delete(bs1, name); |
2340 | if (ret < 0) { | |
2341 | if (ret == -ENOTSUP) | |
376253ec AL |
2342 | monitor_printf(mon, |
2343 | "Snapshots not supported on device '%s'\n", | |
2344 | bdrv_get_device_name(bs1)); | |
a672b469 | 2345 | else |
376253ec AL |
2346 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2347 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2348 | } |
2349 | } | |
2350 | } | |
2351 | } | |
2352 | ||
376253ec | 2353 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2354 | { |
2355 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2356 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2357 | int nb_sns, i, ret, available; | |
2358 | int total; | |
2359 | int *available_snapshots; | |
a672b469 AL |
2360 | char buf[256]; |
2361 | ||
f9092b10 | 2362 | bs = bdrv_snapshots(); |
a672b469 | 2363 | if (!bs) { |
376253ec | 2364 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2365 | return; |
2366 | } | |
a672b469 AL |
2367 | |
2368 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2369 | if (nb_sns < 0) { | |
376253ec | 2370 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2371 | return; |
2372 | } | |
f9209915 MDCF |
2373 | |
2374 | if (nb_sns == 0) { | |
2375 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2376 | return; | |
2377 | } | |
2378 | ||
7267c094 | 2379 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2380 | total = 0; |
2381 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2382 | sn = &sn_tab[i]; |
f9209915 MDCF |
2383 | available = 1; |
2384 | bs1 = NULL; | |
2385 | ||
2386 | while ((bs1 = bdrv_next(bs1))) { | |
2387 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2388 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2389 | if (ret < 0) { | |
2390 | available = 0; | |
2391 | break; | |
2392 | } | |
2393 | } | |
2394 | } | |
2395 | ||
2396 | if (available) { | |
2397 | available_snapshots[total] = i; | |
2398 | total++; | |
2399 | } | |
a672b469 | 2400 | } |
f9209915 MDCF |
2401 | |
2402 | if (total > 0) { | |
2403 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2404 | for (i = 0; i < total; i++) { | |
2405 | sn = &sn_tab[available_snapshots[i]]; | |
2406 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2407 | } | |
2408 | } else { | |
2409 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2410 | } | |
2411 | ||
7267c094 AL |
2412 | g_free(sn_tab); |
2413 | g_free(available_snapshots); | |
f9209915 | 2414 | |
a672b469 | 2415 | } |
c5705a77 AK |
2416 | |
2417 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2418 | { | |
1ddde087 | 2419 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2420 | memory_region_name(mr), dev); |
2421 | } | |
2422 | ||
2423 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2424 | { | |
2425 | /* Nothing do to while the implementation is in RAMBlock */ | |
2426 | } | |
2427 | ||
2428 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2429 | { | |
2430 | vmstate_register_ram(mr, NULL); | |
2431 | } | |
302dfbeb OW |
2432 | |
2433 | /* | |
2434 | page = zrun nzrun | |
2435 | | zrun nzrun page | |
2436 | ||
2437 | zrun = length | |
2438 | ||
2439 | nzrun = length byte... | |
2440 | ||
2441 | length = uleb128 encoded integer | |
2442 | */ | |
2443 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2444 | uint8_t *dst, int dlen) | |
2445 | { | |
2446 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2447 | int d = 0, i = 0; | |
2448 | long res, xor; | |
2449 | uint8_t *nzrun_start = NULL; | |
2450 | ||
2451 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2452 | sizeof(long))); | |
2453 | ||
2454 | while (i < slen) { | |
2455 | /* overflow */ | |
2456 | if (d + 2 > dlen) { | |
2457 | return -1; | |
2458 | } | |
2459 | ||
2460 | /* not aligned to sizeof(long) */ | |
2461 | res = (slen - i) % sizeof(long); | |
2462 | while (res && old_buf[i] == new_buf[i]) { | |
2463 | zrun_len++; | |
2464 | i++; | |
2465 | res--; | |
2466 | } | |
2467 | ||
2468 | /* word at a time for speed */ | |
2469 | if (!res) { | |
2470 | while (i < slen && | |
2471 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2472 | i += sizeof(long); | |
2473 | zrun_len += sizeof(long); | |
2474 | } | |
2475 | ||
2476 | /* go over the rest */ | |
2477 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2478 | zrun_len++; | |
2479 | i++; | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | /* buffer unchanged */ | |
2484 | if (zrun_len == slen) { | |
2485 | return 0; | |
2486 | } | |
2487 | ||
2488 | /* skip last zero run */ | |
2489 | if (i == slen) { | |
2490 | return d; | |
2491 | } | |
2492 | ||
2493 | d += uleb128_encode_small(dst + d, zrun_len); | |
2494 | ||
2495 | zrun_len = 0; | |
2496 | nzrun_start = new_buf + i; | |
2497 | ||
2498 | /* overflow */ | |
2499 | if (d + 2 > dlen) { | |
2500 | return -1; | |
2501 | } | |
2502 | /* not aligned to sizeof(long) */ | |
2503 | res = (slen - i) % sizeof(long); | |
2504 | while (res && old_buf[i] != new_buf[i]) { | |
2505 | i++; | |
2506 | nzrun_len++; | |
2507 | res--; | |
2508 | } | |
2509 | ||
2510 | /* word at a time for speed, use of 32-bit long okay */ | |
2511 | if (!res) { | |
2512 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2513 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2514 | while (i < slen) { |
2515 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2516 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2517 | /* found the end of an nzrun within the current long */ | |
2518 | while (old_buf[i] != new_buf[i]) { | |
2519 | nzrun_len++; | |
2520 | i++; | |
2521 | } | |
2522 | break; | |
2523 | } else { | |
2524 | i += sizeof(long); | |
2525 | nzrun_len += sizeof(long); | |
2526 | } | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2531 | /* overflow */ | |
2532 | if (d + nzrun_len > dlen) { | |
2533 | return -1; | |
2534 | } | |
2535 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2536 | d += nzrun_len; | |
2537 | nzrun_len = 0; | |
2538 | } | |
2539 | ||
2540 | return d; | |
2541 | } | |
2542 | ||
2543 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2544 | { | |
2545 | int i = 0, d = 0; | |
2546 | int ret; | |
2547 | uint32_t count = 0; | |
2548 | ||
2549 | while (i < slen) { | |
2550 | ||
2551 | /* zrun */ | |
2552 | if ((slen - i) < 2) { | |
2553 | return -1; | |
2554 | } | |
2555 | ||
2556 | ret = uleb128_decode_small(src + i, &count); | |
2557 | if (ret < 0 || (i && !count)) { | |
2558 | return -1; | |
2559 | } | |
2560 | i += ret; | |
2561 | d += count; | |
2562 | ||
2563 | /* overflow */ | |
2564 | if (d > dlen) { | |
2565 | return -1; | |
2566 | } | |
2567 | ||
2568 | /* nzrun */ | |
2569 | if ((slen - i) < 2) { | |
2570 | return -1; | |
2571 | } | |
2572 | ||
2573 | ret = uleb128_decode_small(src + i, &count); | |
2574 | if (ret < 0 || !count) { | |
2575 | return -1; | |
2576 | } | |
2577 | i += ret; | |
2578 | ||
2579 | /* overflow */ | |
2580 | if (d + count > dlen || i + count > slen) { | |
2581 | return -1; | |
2582 | } | |
2583 | ||
2584 | memcpy(dst + d, src + i, count); | |
2585 | d += count; | |
2586 | i += count; | |
2587 | } | |
2588 | ||
2589 | return d; | |
2590 | } |