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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" |
1422e32d | 75 | #include "net/net.h" |
83c9089e | 76 | #include "monitor/monitor.h" |
9c17d615 | 77 | #include "sysemu/sysemu.h" |
1de7afc9 | 78 | #include "qemu/timer.h" |
511d2b14 | 79 | #include "audio/audio.h" |
caf71f86 | 80 | #include "migration/migration.h" |
1de7afc9 PB |
81 | #include "qemu/sockets.h" |
82 | #include "qemu/queue.h" | |
83 | #include "qemu/timer.h" | |
9c17d615 | 84 | #include "sysemu/cpus.h" |
022c62cb | 85 | #include "exec/memory.h" |
a7ae8355 | 86 | #include "qmp-commands.h" |
517a13c9 | 87 | #include "trace.h" |
1de7afc9 | 88 | #include "qemu/bitops.h" |
511d2b14 | 89 | |
a672b469 | 90 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 91 | |
18995b98 | 92 | #ifndef ETH_P_RARP |
f8778a77 | 93 | #define ETH_P_RARP 0x8035 |
18995b98 N |
94 | #endif |
95 | #define ARP_HTYPE_ETH 0x0001 | |
96 | #define ARP_PTYPE_IP 0x0800 | |
97 | #define ARP_OP_REQUEST_REV 0x3 | |
98 | ||
99 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
100 | uint8_t *mac_addr) |
101 | { | |
18995b98 N |
102 | /* Ethernet header. */ |
103 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
104 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
105 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
106 | ||
107 | /* RARP header. */ | |
108 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
109 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
110 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
111 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
112 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
113 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
114 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
115 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
116 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
117 | ||
118 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
119 | memset(buf + 42, 0x00, 18); | |
120 | ||
121 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
122 | } |
123 | ||
f401ca22 | 124 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 125 | { |
18995b98 | 126 | uint8_t buf[60]; |
f401ca22 MM |
127 | int len; |
128 | ||
129 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
130 | ||
131 | qemu_send_packet_raw(&nic->nc, buf, len); | |
132 | } | |
133 | ||
134 | ||
135 | static void qemu_announce_self_once(void *opaque) | |
136 | { | |
ed8b330b GN |
137 | static int count = SELF_ANNOUNCE_ROUNDS; |
138 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 139 | |
f401ca22 MM |
140 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
141 | ||
18995b98 N |
142 | if (--count) { |
143 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 144 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 145 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
146 | } else { |
147 | qemu_del_timer(timer); | |
148 | qemu_free_timer(timer); | |
149 | } | |
150 | } | |
151 | ||
152 | void qemu_announce_self(void) | |
153 | { | |
154 | static QEMUTimer *timer; | |
7bd427d8 | 155 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 156 | qemu_announce_self_once(&timer); |
a672b469 AL |
157 | } |
158 | ||
159 | /***********************************************************/ | |
160 | /* savevm/loadvm support */ | |
161 | ||
162 | #define IO_BUF_SIZE 32768 | |
163 | ||
164 | struct QEMUFile { | |
9229bf3c | 165 | const QEMUFileOps *ops; |
a672b469 AL |
166 | void *opaque; |
167 | int is_write; | |
168 | ||
169 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
170 | when reading */ | |
171 | int buf_index; | |
172 | int buf_size; /* 0 when writing */ | |
173 | uint8_t buf[IO_BUF_SIZE]; | |
174 | ||
3961b4dd | 175 | int last_error; |
a672b469 AL |
176 | }; |
177 | ||
7f79dd28 | 178 | typedef struct QEMUFileStdio |
a672b469 | 179 | { |
7f79dd28 | 180 | FILE *stdio_file; |
a672b469 | 181 | QEMUFile *file; |
7f79dd28 | 182 | } QEMUFileStdio; |
a672b469 AL |
183 | |
184 | typedef struct QEMUFileSocket | |
185 | { | |
186 | int fd; | |
187 | QEMUFile *file; | |
188 | } QEMUFileSocket; | |
189 | ||
70eb6330 PB |
190 | static int socket_get_fd(void *opaque) |
191 | { | |
192 | QEMUFileSocket *s = opaque; | |
193 | ||
194 | return s->fd; | |
195 | } | |
196 | ||
a672b469 AL |
197 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
198 | { | |
199 | QEMUFileSocket *s = opaque; | |
200 | ssize_t len; | |
201 | ||
595ab641 | 202 | for (;;) { |
00aa0040 | 203 | len = qemu_recv(s->fd, buf, size, 0); |
595ab641 PB |
204 | if (len != -1) { |
205 | break; | |
206 | } | |
207 | if (socket_error() == EAGAIN) { | |
208 | assert(qemu_in_coroutine()); | |
209 | qemu_coroutine_yield(); | |
210 | } else if (socket_error() != EINTR) { | |
211 | break; | |
212 | } | |
213 | } | |
a672b469 | 214 | |
595ab641 | 215 | if (len == -1) { |
a672b469 | 216 | len = -socket_error(); |
595ab641 | 217 | } |
a672b469 AL |
218 | return len; |
219 | } | |
220 | ||
221 | static int socket_close(void *opaque) | |
222 | { | |
223 | QEMUFileSocket *s = opaque; | |
ab52a824 | 224 | closesocket(s->fd); |
7267c094 | 225 | g_free(s); |
a672b469 AL |
226 | return 0; |
227 | } | |
228 | ||
70eb6330 PB |
229 | static int stdio_get_fd(void *opaque) |
230 | { | |
231 | QEMUFileStdio *s = opaque; | |
232 | ||
233 | return fileno(s->stdio_file); | |
234 | } | |
235 | ||
7f79dd28 | 236 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 237 | { |
7f79dd28 PB |
238 | QEMUFileStdio *s = opaque; |
239 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
240 | } |
241 | ||
7f79dd28 | 242 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 243 | { |
7f79dd28 PB |
244 | QEMUFileStdio *s = opaque; |
245 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
246 | int bytes; |
247 | ||
595ab641 | 248 | for (;;) { |
8a67ec4d UL |
249 | clearerr(fp); |
250 | bytes = fread(buf, 1, size, fp); | |
595ab641 PB |
251 | if (bytes != 0 || !ferror(fp)) { |
252 | break; | |
253 | } | |
254 | if (errno == EAGAIN) { | |
255 | assert(qemu_in_coroutine()); | |
256 | qemu_coroutine_yield(); | |
257 | } else if (errno != EINTR) { | |
258 | break; | |
259 | } | |
260 | } | |
8a67ec4d | 261 | return bytes; |
a672b469 AL |
262 | } |
263 | ||
7f79dd28 PB |
264 | static int stdio_pclose(void *opaque) |
265 | { | |
266 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
267 | int ret; |
268 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
269 | if (ret == -1) { |
270 | ret = -errno; | |
271 | } | |
7267c094 | 272 | g_free(s); |
41ef56e6 | 273 | return ret; |
7f79dd28 PB |
274 | } |
275 | ||
276 | static int stdio_fclose(void *opaque) | |
a672b469 | 277 | { |
7f79dd28 | 278 | QEMUFileStdio *s = opaque; |
0e286705 EH |
279 | int ret = 0; |
280 | if (fclose(s->stdio_file) == EOF) { | |
281 | ret = -errno; | |
282 | } | |
7267c094 | 283 | g_free(s); |
0e286705 | 284 | return ret; |
a672b469 AL |
285 | } |
286 | ||
9229bf3c | 287 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 288 | .get_fd = stdio_get_fd, |
9229bf3c PB |
289 | .get_buffer = stdio_get_buffer, |
290 | .close = stdio_pclose | |
291 | }; | |
292 | ||
293 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 294 | .get_fd = stdio_get_fd, |
9229bf3c PB |
295 | .put_buffer = stdio_put_buffer, |
296 | .close = stdio_pclose | |
297 | }; | |
298 | ||
7f79dd28 | 299 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 300 | { |
7f79dd28 | 301 | QEMUFileStdio *s; |
a672b469 | 302 | |
7f79dd28 | 303 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
304 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
305 | return NULL; | |
306 | } | |
307 | ||
7267c094 | 308 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 309 | |
7f79dd28 | 310 | s->stdio_file = stdio_file; |
a672b469 AL |
311 | |
312 | if(mode[0] == 'r') { | |
9229bf3c | 313 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 314 | } else { |
9229bf3c | 315 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 316 | } |
a672b469 AL |
317 | return s->file; |
318 | } | |
319 | ||
320 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
321 | { | |
322 | FILE *popen_file; | |
323 | ||
324 | popen_file = popen(command, mode); | |
325 | if(popen_file == NULL) { | |
326 | return NULL; | |
327 | } | |
328 | ||
329 | return qemu_popen(popen_file, mode); | |
330 | } | |
331 | ||
9229bf3c | 332 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 333 | .get_fd = stdio_get_fd, |
9229bf3c PB |
334 | .get_buffer = stdio_get_buffer, |
335 | .close = stdio_fclose | |
336 | }; | |
337 | ||
338 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 339 | .get_fd = stdio_get_fd, |
9229bf3c PB |
340 | .put_buffer = stdio_put_buffer, |
341 | .close = stdio_fclose | |
342 | }; | |
343 | ||
5ac1fad3 PB |
344 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
345 | { | |
346 | QEMUFileStdio *s; | |
347 | ||
348 | if (mode == NULL || | |
349 | (mode[0] != 'r' && mode[0] != 'w') || | |
350 | mode[1] != 'b' || mode[2] != 0) { | |
351 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
352 | return NULL; | |
353 | } | |
354 | ||
7267c094 | 355 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
356 | s->stdio_file = fdopen(fd, mode); |
357 | if (!s->stdio_file) | |
358 | goto fail; | |
359 | ||
360 | if(mode[0] == 'r') { | |
9229bf3c | 361 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 362 | } else { |
9229bf3c | 363 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
364 | } |
365 | return s->file; | |
366 | ||
367 | fail: | |
7267c094 | 368 | g_free(s); |
5ac1fad3 PB |
369 | return NULL; |
370 | } | |
371 | ||
9229bf3c | 372 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 373 | .get_fd = socket_get_fd, |
9229bf3c PB |
374 | .get_buffer = socket_get_buffer, |
375 | .close = socket_close | |
376 | }; | |
377 | ||
a672b469 AL |
378 | QEMUFile *qemu_fopen_socket(int fd) |
379 | { | |
7267c094 | 380 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 381 | |
a672b469 | 382 | s->fd = fd; |
9229bf3c | 383 | s->file = qemu_fopen_ops(s, &socket_read_ops); |
a672b469 AL |
384 | return s->file; |
385 | } | |
386 | ||
a672b469 AL |
387 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
388 | { | |
389 | QEMUFileStdio *s; | |
390 | ||
7f79dd28 PB |
391 | if (mode == NULL || |
392 | (mode[0] != 'r' && mode[0] != 'w') || | |
393 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 394 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
395 | return NULL; |
396 | } | |
397 | ||
7267c094 | 398 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 399 | |
7f79dd28 PB |
400 | s->stdio_file = fopen(filename, mode); |
401 | if (!s->stdio_file) | |
a672b469 | 402 | goto fail; |
c163b5ca | 403 | |
7f79dd28 | 404 | if(mode[0] == 'w') { |
9229bf3c | 405 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 406 | } else { |
9229bf3c | 407 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
408 | } |
409 | return s->file; | |
a672b469 | 410 | fail: |
7267c094 | 411 | g_free(s); |
a672b469 AL |
412 | return NULL; |
413 | } | |
414 | ||
178e08a5 | 415 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
416 | int64_t pos, int size) |
417 | { | |
45566e9c | 418 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
419 | return size; |
420 | } | |
421 | ||
178e08a5 | 422 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 423 | { |
45566e9c | 424 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
425 | } |
426 | ||
427 | static int bdrv_fclose(void *opaque) | |
428 | { | |
ad492c92 | 429 | return bdrv_flush(opaque); |
a672b469 AL |
430 | } |
431 | ||
9229bf3c PB |
432 | static const QEMUFileOps bdrv_read_ops = { |
433 | .get_buffer = block_get_buffer, | |
434 | .close = bdrv_fclose | |
435 | }; | |
436 | ||
437 | static const QEMUFileOps bdrv_write_ops = { | |
438 | .put_buffer = block_put_buffer, | |
439 | .close = bdrv_fclose | |
440 | }; | |
441 | ||
45566e9c | 442 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 443 | { |
a672b469 | 444 | if (is_writable) |
9229bf3c PB |
445 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
446 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
447 | } |
448 | ||
9229bf3c | 449 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
450 | { |
451 | QEMUFile *f; | |
452 | ||
7267c094 | 453 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
454 | |
455 | f->opaque = opaque; | |
9229bf3c | 456 | f->ops = ops; |
a672b469 AL |
457 | f->is_write = 0; |
458 | ||
459 | return f; | |
460 | } | |
461 | ||
624b9cc2 | 462 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 463 | { |
3961b4dd | 464 | return f->last_error; |
a672b469 AL |
465 | } |
466 | ||
6f121ff5 | 467 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 468 | { |
3961b4dd | 469 | f->last_error = ret; |
4dabe248 AL |
470 | } |
471 | ||
d82ca915 EH |
472 | /** Flushes QEMUFile buffer |
473 | * | |
d82ca915 | 474 | */ |
7311bea3 | 475 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 476 | { |
7311bea3 JQ |
477 | int ret = 0; |
478 | ||
9229bf3c | 479 | if (!f->ops->put_buffer) |
7311bea3 | 480 | return 0; |
a672b469 AL |
481 | |
482 | if (f->is_write && f->buf_index > 0) { | |
9229bf3c | 483 | ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
7311bea3 | 484 | if (ret >= 0) { |
a672b469 | 485 | f->buf_offset += f->buf_index; |
7311bea3 | 486 | } |
a672b469 AL |
487 | f->buf_index = 0; |
488 | } | |
7311bea3 | 489 | return ret; |
a672b469 AL |
490 | } |
491 | ||
492 | static void qemu_fill_buffer(QEMUFile *f) | |
493 | { | |
494 | int len; | |
0046c45b | 495 | int pending; |
a672b469 | 496 | |
9229bf3c | 497 | if (!f->ops->get_buffer) |
a672b469 AL |
498 | return; |
499 | ||
500 | if (f->is_write) | |
501 | abort(); | |
502 | ||
0046c45b JQ |
503 | pending = f->buf_size - f->buf_index; |
504 | if (pending > 0) { | |
505 | memmove(f->buf, f->buf + f->buf_index, pending); | |
506 | } | |
507 | f->buf_index = 0; | |
508 | f->buf_size = pending; | |
509 | ||
9229bf3c | 510 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
0046c45b | 511 | IO_BUF_SIZE - pending); |
a672b469 | 512 | if (len > 0) { |
0046c45b | 513 | f->buf_size += len; |
a672b469 | 514 | f->buf_offset += len; |
fa39a30f | 515 | } else if (len == 0) { |
02c4a051 | 516 | qemu_file_set_error(f, -EIO); |
a672b469 | 517 | } else if (len != -EAGAIN) |
c29110d5 | 518 | qemu_file_set_error(f, len); |
a672b469 AL |
519 | } |
520 | ||
70eb6330 PB |
521 | int qemu_get_fd(QEMUFile *f) |
522 | { | |
523 | if (f->ops->get_fd) { | |
524 | return f->ops->get_fd(f->opaque); | |
525 | } | |
526 | return -1; | |
527 | } | |
528 | ||
d82ca915 EH |
529 | /** Closes the file |
530 | * | |
531 | * Returns negative error value if any error happened on previous operations or | |
532 | * while closing the file. Returns 0 or positive number on success. | |
533 | * | |
534 | * The meaning of return value on success depends on the specific backend | |
535 | * being used. | |
536 | */ | |
537 | int qemu_fclose(QEMUFile *f) | |
538 | { | |
29eee86f | 539 | int ret; |
7311bea3 | 540 | ret = qemu_fflush(f); |
7311bea3 | 541 | |
9229bf3c PB |
542 | if (f->ops->close) { |
543 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
544 | if (ret >= 0) { |
545 | ret = ret2; | |
546 | } | |
7311bea3 | 547 | } |
d82ca915 EH |
548 | /* If any error was spotted before closing, we should report it |
549 | * instead of the close() return value. | |
550 | */ | |
551 | if (f->last_error) { | |
552 | ret = f->last_error; | |
553 | } | |
7267c094 | 554 | g_free(f); |
a672b469 AL |
555 | return ret; |
556 | } | |
557 | ||
a672b469 AL |
558 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
559 | { | |
560 | int l; | |
561 | ||
c10682cb JQ |
562 | if (f->last_error) { |
563 | return; | |
564 | } | |
565 | ||
566 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
567 | fprintf(stderr, |
568 | "Attempted to write to buffer while read buffer is not empty\n"); | |
569 | abort(); | |
570 | } | |
571 | ||
c10682cb | 572 | while (size > 0) { |
a672b469 AL |
573 | l = IO_BUF_SIZE - f->buf_index; |
574 | if (l > size) | |
575 | l = size; | |
576 | memcpy(f->buf + f->buf_index, buf, l); | |
577 | f->is_write = 1; | |
578 | f->buf_index += l; | |
579 | buf += l; | |
580 | size -= l; | |
7311bea3 JQ |
581 | if (f->buf_index >= IO_BUF_SIZE) { |
582 | int ret = qemu_fflush(f); | |
c10682cb JQ |
583 | if (ret < 0) { |
584 | qemu_file_set_error(f, ret); | |
585 | break; | |
586 | } | |
7311bea3 | 587 | } |
a672b469 AL |
588 | } |
589 | } | |
590 | ||
591 | void qemu_put_byte(QEMUFile *f, int v) | |
592 | { | |
c10682cb JQ |
593 | if (f->last_error) { |
594 | return; | |
595 | } | |
596 | ||
597 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
598 | fprintf(stderr, |
599 | "Attempted to write to buffer while read buffer is not empty\n"); | |
600 | abort(); | |
601 | } | |
602 | ||
603 | f->buf[f->buf_index++] = v; | |
604 | f->is_write = 1; | |
7311bea3 JQ |
605 | if (f->buf_index >= IO_BUF_SIZE) { |
606 | int ret = qemu_fflush(f); | |
c10682cb JQ |
607 | if (ret < 0) { |
608 | qemu_file_set_error(f, ret); | |
609 | } | |
7311bea3 | 610 | } |
a672b469 AL |
611 | } |
612 | ||
c6380724 | 613 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 614 | { |
c6380724 JQ |
615 | if (f->buf_index + size <= f->buf_size) { |
616 | f->buf_index += size; | |
617 | } | |
618 | } | |
619 | ||
620 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 621 | { |
c6380724 JQ |
622 | int pending; |
623 | int index; | |
a672b469 | 624 | |
b9ce1454 | 625 | if (f->is_write) { |
a672b469 | 626 | abort(); |
b9ce1454 | 627 | } |
a672b469 | 628 | |
c6380724 JQ |
629 | index = f->buf_index + offset; |
630 | pending = f->buf_size - index; | |
631 | if (pending < size) { | |
632 | qemu_fill_buffer(f); | |
633 | index = f->buf_index + offset; | |
634 | pending = f->buf_size - index; | |
635 | } | |
636 | ||
637 | if (pending <= 0) { | |
638 | return 0; | |
639 | } | |
640 | if (size > pending) { | |
641 | size = pending; | |
642 | } | |
643 | ||
644 | memcpy(buf, f->buf + index, size); | |
645 | return size; | |
646 | } | |
647 | ||
648 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
649 | { | |
650 | int pending = size; | |
651 | int done = 0; | |
652 | ||
653 | while (pending > 0) { | |
654 | int res; | |
655 | ||
656 | res = qemu_peek_buffer(f, buf, pending, 0); | |
657 | if (res == 0) { | |
658 | return done; | |
a672b469 | 659 | } |
c6380724 JQ |
660 | qemu_file_skip(f, res); |
661 | buf += res; | |
662 | pending -= res; | |
663 | done += res; | |
a672b469 | 664 | } |
c6380724 | 665 | return done; |
a672b469 AL |
666 | } |
667 | ||
c6380724 | 668 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 669 | { |
c6380724 JQ |
670 | int index = f->buf_index + offset; |
671 | ||
b9ce1454 | 672 | if (f->is_write) { |
811814bd | 673 | abort(); |
b9ce1454 | 674 | } |
811814bd | 675 | |
c6380724 | 676 | if (index >= f->buf_size) { |
811814bd | 677 | qemu_fill_buffer(f); |
c6380724 JQ |
678 | index = f->buf_index + offset; |
679 | if (index >= f->buf_size) { | |
811814bd | 680 | return 0; |
b9ce1454 | 681 | } |
811814bd | 682 | } |
c6380724 | 683 | return f->buf[index]; |
811814bd JQ |
684 | } |
685 | ||
a672b469 AL |
686 | int qemu_get_byte(QEMUFile *f) |
687 | { | |
65f3bb3d | 688 | int result; |
a672b469 | 689 | |
c6380724 JQ |
690 | result = qemu_peek_byte(f, 0); |
691 | qemu_file_skip(f, 1); | |
65f3bb3d | 692 | return result; |
a672b469 AL |
693 | } |
694 | ||
3aee4be1 | 695 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
696 | { |
697 | return f->buf_offset - f->buf_size + f->buf_index; | |
698 | } | |
699 | ||
a672b469 AL |
700 | int qemu_file_rate_limit(QEMUFile *f) |
701 | { | |
9229bf3c PB |
702 | if (f->ops->rate_limit) |
703 | return f->ops->rate_limit(f->opaque); | |
a672b469 AL |
704 | |
705 | return 0; | |
706 | } | |
707 | ||
3d002df3 | 708 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 709 | { |
9229bf3c PB |
710 | if (f->ops->get_rate_limit) |
711 | return f->ops->get_rate_limit(f->opaque); | |
c163b5ca | 712 | |
713 | return 0; | |
714 | } | |
715 | ||
3d002df3 | 716 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 717 | { |
0bb05eaf GC |
718 | /* any failed or completed migration keeps its state to allow probing of |
719 | * migration data, but has no associated file anymore */ | |
9229bf3c PB |
720 | if (f && f->ops->set_rate_limit) |
721 | return f->ops->set_rate_limit(f->opaque, new_rate); | |
19629537 GC |
722 | |
723 | return 0; | |
724 | } | |
725 | ||
a672b469 AL |
726 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
727 | { | |
728 | qemu_put_byte(f, v >> 8); | |
729 | qemu_put_byte(f, v); | |
730 | } | |
731 | ||
732 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
733 | { | |
734 | qemu_put_byte(f, v >> 24); | |
735 | qemu_put_byte(f, v >> 16); | |
736 | qemu_put_byte(f, v >> 8); | |
737 | qemu_put_byte(f, v); | |
738 | } | |
739 | ||
740 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
741 | { | |
742 | qemu_put_be32(f, v >> 32); | |
743 | qemu_put_be32(f, v); | |
744 | } | |
745 | ||
746 | unsigned int qemu_get_be16(QEMUFile *f) | |
747 | { | |
748 | unsigned int v; | |
749 | v = qemu_get_byte(f) << 8; | |
750 | v |= qemu_get_byte(f); | |
751 | return v; | |
752 | } | |
753 | ||
754 | unsigned int qemu_get_be32(QEMUFile *f) | |
755 | { | |
756 | unsigned int v; | |
757 | v = qemu_get_byte(f) << 24; | |
758 | v |= qemu_get_byte(f) << 16; | |
759 | v |= qemu_get_byte(f) << 8; | |
760 | v |= qemu_get_byte(f); | |
761 | return v; | |
762 | } | |
763 | ||
764 | uint64_t qemu_get_be64(QEMUFile *f) | |
765 | { | |
766 | uint64_t v; | |
767 | v = (uint64_t)qemu_get_be32(f) << 32; | |
768 | v |= qemu_get_be32(f); | |
769 | return v; | |
770 | } | |
771 | ||
2ff68d07 PB |
772 | |
773 | /* timer */ | |
774 | ||
775 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
776 | { | |
777 | uint64_t expire_time; | |
778 | ||
779 | expire_time = qemu_timer_expire_time_ns(ts); | |
780 | qemu_put_be64(f, expire_time); | |
781 | } | |
782 | ||
783 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
784 | { | |
785 | uint64_t expire_time; | |
786 | ||
787 | expire_time = qemu_get_be64(f); | |
788 | if (expire_time != -1) { | |
789 | qemu_mod_timer_ns(ts, expire_time); | |
790 | } else { | |
791 | qemu_del_timer(ts); | |
792 | } | |
793 | } | |
794 | ||
795 | ||
cdae5cfb GH |
796 | /* bool */ |
797 | ||
798 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
799 | { | |
800 | bool *v = pv; | |
801 | *v = qemu_get_byte(f); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
806 | { | |
807 | bool *v = pv; | |
808 | qemu_put_byte(f, *v); | |
809 | } | |
810 | ||
811 | const VMStateInfo vmstate_info_bool = { | |
812 | .name = "bool", | |
813 | .get = get_bool, | |
814 | .put = put_bool, | |
815 | }; | |
816 | ||
9ed7d6ae JQ |
817 | /* 8 bit int */ |
818 | ||
819 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
820 | { | |
821 | int8_t *v = pv; | |
822 | qemu_get_s8s(f, v); | |
823 | return 0; | |
824 | } | |
825 | ||
84e2e3eb | 826 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 827 | { |
84e2e3eb | 828 | int8_t *v = pv; |
9ed7d6ae JQ |
829 | qemu_put_s8s(f, v); |
830 | } | |
831 | ||
832 | const VMStateInfo vmstate_info_int8 = { | |
833 | .name = "int8", | |
834 | .get = get_int8, | |
835 | .put = put_int8, | |
836 | }; | |
837 | ||
838 | /* 16 bit int */ | |
839 | ||
840 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
841 | { | |
842 | int16_t *v = pv; | |
843 | qemu_get_sbe16s(f, v); | |
844 | return 0; | |
845 | } | |
846 | ||
84e2e3eb | 847 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 848 | { |
84e2e3eb | 849 | int16_t *v = pv; |
9ed7d6ae JQ |
850 | qemu_put_sbe16s(f, v); |
851 | } | |
852 | ||
853 | const VMStateInfo vmstate_info_int16 = { | |
854 | .name = "int16", | |
855 | .get = get_int16, | |
856 | .put = put_int16, | |
857 | }; | |
858 | ||
859 | /* 32 bit int */ | |
860 | ||
861 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
862 | { | |
863 | int32_t *v = pv; | |
864 | qemu_get_sbe32s(f, v); | |
865 | return 0; | |
866 | } | |
867 | ||
84e2e3eb | 868 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 869 | { |
84e2e3eb | 870 | int32_t *v = pv; |
9ed7d6ae JQ |
871 | qemu_put_sbe32s(f, v); |
872 | } | |
873 | ||
874 | const VMStateInfo vmstate_info_int32 = { | |
875 | .name = "int32", | |
876 | .get = get_int32, | |
877 | .put = put_int32, | |
878 | }; | |
879 | ||
82501660 JQ |
880 | /* 32 bit int. See that the received value is the same than the one |
881 | in the field */ | |
882 | ||
883 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
884 | { | |
885 | int32_t *v = pv; | |
886 | int32_t v2; | |
887 | qemu_get_sbe32s(f, &v2); | |
888 | ||
889 | if (*v == v2) | |
890 | return 0; | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | const VMStateInfo vmstate_info_int32_equal = { | |
895 | .name = "int32 equal", | |
896 | .get = get_int32_equal, | |
897 | .put = put_int32, | |
898 | }; | |
899 | ||
0a031e0a JQ |
900 | /* 32 bit int. See that the received value is the less or the same |
901 | than the one in the field */ | |
902 | ||
903 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
904 | { | |
905 | int32_t *old = pv; | |
906 | int32_t new; | |
907 | qemu_get_sbe32s(f, &new); | |
908 | ||
909 | if (*old <= new) | |
910 | return 0; | |
911 | return -EINVAL; | |
912 | } | |
913 | ||
914 | const VMStateInfo vmstate_info_int32_le = { | |
915 | .name = "int32 equal", | |
916 | .get = get_int32_le, | |
917 | .put = put_int32, | |
918 | }; | |
919 | ||
9ed7d6ae JQ |
920 | /* 64 bit int */ |
921 | ||
922 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
923 | { | |
924 | int64_t *v = pv; | |
925 | qemu_get_sbe64s(f, v); | |
926 | return 0; | |
927 | } | |
928 | ||
84e2e3eb | 929 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 930 | { |
84e2e3eb | 931 | int64_t *v = pv; |
9ed7d6ae JQ |
932 | qemu_put_sbe64s(f, v); |
933 | } | |
934 | ||
935 | const VMStateInfo vmstate_info_int64 = { | |
936 | .name = "int64", | |
937 | .get = get_int64, | |
938 | .put = put_int64, | |
939 | }; | |
940 | ||
941 | /* 8 bit unsigned int */ | |
942 | ||
943 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
944 | { | |
945 | uint8_t *v = pv; | |
946 | qemu_get_8s(f, v); | |
947 | return 0; | |
948 | } | |
949 | ||
84e2e3eb | 950 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 951 | { |
84e2e3eb | 952 | uint8_t *v = pv; |
9ed7d6ae JQ |
953 | qemu_put_8s(f, v); |
954 | } | |
955 | ||
956 | const VMStateInfo vmstate_info_uint8 = { | |
957 | .name = "uint8", | |
958 | .get = get_uint8, | |
959 | .put = put_uint8, | |
960 | }; | |
961 | ||
962 | /* 16 bit unsigned int */ | |
963 | ||
964 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
965 | { | |
966 | uint16_t *v = pv; | |
967 | qemu_get_be16s(f, v); | |
968 | return 0; | |
969 | } | |
970 | ||
84e2e3eb | 971 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 972 | { |
84e2e3eb | 973 | uint16_t *v = pv; |
9ed7d6ae JQ |
974 | qemu_put_be16s(f, v); |
975 | } | |
976 | ||
977 | const VMStateInfo vmstate_info_uint16 = { | |
978 | .name = "uint16", | |
979 | .get = get_uint16, | |
980 | .put = put_uint16, | |
981 | }; | |
982 | ||
983 | /* 32 bit unsigned int */ | |
984 | ||
985 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
986 | { | |
987 | uint32_t *v = pv; | |
988 | qemu_get_be32s(f, v); | |
989 | return 0; | |
990 | } | |
991 | ||
84e2e3eb | 992 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 993 | { |
84e2e3eb | 994 | uint32_t *v = pv; |
9ed7d6ae JQ |
995 | qemu_put_be32s(f, v); |
996 | } | |
997 | ||
998 | const VMStateInfo vmstate_info_uint32 = { | |
999 | .name = "uint32", | |
1000 | .get = get_uint32, | |
1001 | .put = put_uint32, | |
1002 | }; | |
1003 | ||
9122a8fe JQ |
1004 | /* 32 bit uint. See that the received value is the same than the one |
1005 | in the field */ | |
1006 | ||
1007 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1008 | { | |
1009 | uint32_t *v = pv; | |
1010 | uint32_t v2; | |
1011 | qemu_get_be32s(f, &v2); | |
1012 | ||
1013 | if (*v == v2) { | |
1014 | return 0; | |
1015 | } | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | ||
1019 | const VMStateInfo vmstate_info_uint32_equal = { | |
1020 | .name = "uint32 equal", | |
1021 | .get = get_uint32_equal, | |
1022 | .put = put_uint32, | |
1023 | }; | |
1024 | ||
9ed7d6ae JQ |
1025 | /* 64 bit unsigned int */ |
1026 | ||
1027 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1028 | { | |
1029 | uint64_t *v = pv; | |
1030 | qemu_get_be64s(f, v); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
84e2e3eb | 1034 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1035 | { |
84e2e3eb | 1036 | uint64_t *v = pv; |
9ed7d6ae JQ |
1037 | qemu_put_be64s(f, v); |
1038 | } | |
1039 | ||
1040 | const VMStateInfo vmstate_info_uint64 = { | |
1041 | .name = "uint64", | |
1042 | .get = get_uint64, | |
1043 | .put = put_uint64, | |
1044 | }; | |
1045 | ||
80cd83e7 JQ |
1046 | /* 8 bit int. See that the received value is the same than the one |
1047 | in the field */ | |
1048 | ||
1049 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1050 | { | |
1051 | uint8_t *v = pv; | |
1052 | uint8_t v2; | |
1053 | qemu_get_8s(f, &v2); | |
1054 | ||
1055 | if (*v == v2) | |
1056 | return 0; | |
1057 | return -EINVAL; | |
1058 | } | |
1059 | ||
1060 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1061 | .name = "uint8 equal", |
80cd83e7 JQ |
1062 | .get = get_uint8_equal, |
1063 | .put = put_uint8, | |
1064 | }; | |
1065 | ||
dc3b83a0 JQ |
1066 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1067 | in the field */ | |
1068 | ||
1069 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1070 | { | |
1071 | uint16_t *v = pv; | |
1072 | uint16_t v2; | |
1073 | qemu_get_be16s(f, &v2); | |
1074 | ||
1075 | if (*v == v2) | |
1076 | return 0; | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | ||
1080 | const VMStateInfo vmstate_info_uint16_equal = { | |
1081 | .name = "uint16 equal", | |
1082 | .get = get_uint16_equal, | |
1083 | .put = put_uint16, | |
1084 | }; | |
1085 | ||
dde0463b JQ |
1086 | /* timers */ |
1087 | ||
1088 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1089 | { | |
1090 | QEMUTimer *v = pv; | |
1091 | qemu_get_timer(f, v); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
84e2e3eb | 1095 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1096 | { |
84e2e3eb | 1097 | QEMUTimer *v = pv; |
dde0463b JQ |
1098 | qemu_put_timer(f, v); |
1099 | } | |
1100 | ||
1101 | const VMStateInfo vmstate_info_timer = { | |
1102 | .name = "timer", | |
1103 | .get = get_timer, | |
1104 | .put = put_timer, | |
1105 | }; | |
1106 | ||
6f67c50f JQ |
1107 | /* uint8_t buffers */ |
1108 | ||
1109 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1110 | { | |
1111 | uint8_t *v = pv; | |
1112 | qemu_get_buffer(f, v, size); | |
1113 | return 0; | |
1114 | } | |
1115 | ||
84e2e3eb | 1116 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1117 | { |
84e2e3eb | 1118 | uint8_t *v = pv; |
6f67c50f JQ |
1119 | qemu_put_buffer(f, v, size); |
1120 | } | |
1121 | ||
1122 | const VMStateInfo vmstate_info_buffer = { | |
1123 | .name = "buffer", | |
1124 | .get = get_buffer, | |
1125 | .put = put_buffer, | |
1126 | }; | |
1127 | ||
76507c75 | 1128 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1129 | not useful anymore */ |
76507c75 JQ |
1130 | |
1131 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1132 | { | |
21174c34 JK |
1133 | uint8_t buf[1024]; |
1134 | int block_len; | |
1135 | ||
1136 | while (size > 0) { | |
1137 | block_len = MIN(sizeof(buf), size); | |
1138 | size -= block_len; | |
1139 | qemu_get_buffer(f, buf, block_len); | |
1140 | } | |
1141 | return 0; | |
76507c75 JQ |
1142 | } |
1143 | ||
1144 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1145 | { | |
21174c34 JK |
1146 | static const uint8_t buf[1024]; |
1147 | int block_len; | |
1148 | ||
1149 | while (size > 0) { | |
1150 | block_len = MIN(sizeof(buf), size); | |
1151 | size -= block_len; | |
1152 | qemu_put_buffer(f, buf, block_len); | |
1153 | } | |
76507c75 JQ |
1154 | } |
1155 | ||
1156 | const VMStateInfo vmstate_info_unused_buffer = { | |
1157 | .name = "unused_buffer", | |
1158 | .get = get_unused_buffer, | |
1159 | .put = put_unused_buffer, | |
1160 | }; | |
1161 | ||
08e99e29 PM |
1162 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1163 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1164 | * bit words with the bits in big endian order. The in-memory format | |
1165 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1166 | */ | |
1167 | /* This is the number of 64 bit words sent over the wire */ | |
1168 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1169 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1170 | { | |
1171 | unsigned long *bmp = pv; | |
1172 | int i, idx = 0; | |
1173 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1174 | uint64_t w = qemu_get_be64(f); | |
1175 | bmp[idx++] = w; | |
1176 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1177 | bmp[idx++] = w >> 32; | |
1178 | } | |
1179 | } | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1184 | { | |
1185 | unsigned long *bmp = pv; | |
1186 | int i, idx = 0; | |
1187 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1188 | uint64_t w = bmp[idx++]; | |
1189 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1190 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1191 | } | |
1192 | qemu_put_be64(f, w); | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | const VMStateInfo vmstate_info_bitmap = { | |
1197 | .name = "bitmap", | |
1198 | .get = get_bitmap, | |
1199 | .put = put_bitmap, | |
1200 | }; | |
1201 | ||
7685ee6a AW |
1202 | typedef struct CompatEntry { |
1203 | char idstr[256]; | |
1204 | int instance_id; | |
1205 | } CompatEntry; | |
1206 | ||
a672b469 | 1207 | typedef struct SaveStateEntry { |
72cf2d4f | 1208 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1209 | char idstr[256]; |
1210 | int instance_id; | |
4d2ffa08 | 1211 | int alias_id; |
a672b469 AL |
1212 | int version_id; |
1213 | int section_id; | |
22ea40f4 | 1214 | SaveVMHandlers *ops; |
9ed7d6ae | 1215 | const VMStateDescription *vmsd; |
a672b469 | 1216 | void *opaque; |
7685ee6a | 1217 | CompatEntry *compat; |
24312968 | 1218 | int no_migrate; |
a7ae8355 | 1219 | int is_ram; |
a672b469 AL |
1220 | } SaveStateEntry; |
1221 | ||
c163b5ca | 1222 | |
72cf2d4f BS |
1223 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1224 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1225 | static int global_section_id; |
a672b469 | 1226 | |
8718e999 JQ |
1227 | static int calculate_new_instance_id(const char *idstr) |
1228 | { | |
1229 | SaveStateEntry *se; | |
1230 | int instance_id = 0; | |
1231 | ||
72cf2d4f | 1232 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1233 | if (strcmp(idstr, se->idstr) == 0 |
1234 | && instance_id <= se->instance_id) { | |
1235 | instance_id = se->instance_id + 1; | |
1236 | } | |
1237 | } | |
1238 | return instance_id; | |
1239 | } | |
1240 | ||
7685ee6a AW |
1241 | static int calculate_compat_instance_id(const char *idstr) |
1242 | { | |
1243 | SaveStateEntry *se; | |
1244 | int instance_id = 0; | |
1245 | ||
1246 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1247 | if (!se->compat) | |
1248 | continue; | |
1249 | ||
1250 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1251 | && instance_id <= se->compat->instance_id) { | |
1252 | instance_id = se->compat->instance_id + 1; | |
1253 | } | |
1254 | } | |
1255 | return instance_id; | |
1256 | } | |
1257 | ||
a672b469 AL |
1258 | /* TODO: Individual devices generally have very little idea about the rest |
1259 | of the system, so instance_id should be removed/replaced. | |
1260 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1261 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1262 | int register_savevm_live(DeviceState *dev, |
1263 | const char *idstr, | |
a672b469 AL |
1264 | int instance_id, |
1265 | int version_id, | |
7908c78d | 1266 | SaveVMHandlers *ops, |
a672b469 AL |
1267 | void *opaque) |
1268 | { | |
8718e999 | 1269 | SaveStateEntry *se; |
a672b469 | 1270 | |
7267c094 | 1271 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1272 | se->version_id = version_id; |
1273 | se->section_id = global_section_id++; | |
7908c78d | 1274 | se->ops = ops; |
a672b469 | 1275 | se->opaque = opaque; |
9ed7d6ae | 1276 | se->vmsd = NULL; |
24312968 | 1277 | se->no_migrate = 0; |
a7ae8355 | 1278 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1279 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1280 | se->is_ram = 1; |
1281 | } | |
a672b469 | 1282 | |
09e5ab63 AL |
1283 | if (dev) { |
1284 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1285 | if (id) { |
1286 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1287 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1288 | g_free(id); |
7685ee6a | 1289 | |
7267c094 | 1290 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1291 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1292 | se->compat->instance_id = instance_id == -1 ? | |
1293 | calculate_compat_instance_id(idstr) : instance_id; | |
1294 | instance_id = -1; | |
1295 | } | |
1296 | } | |
1297 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1298 | ||
8718e999 | 1299 | if (instance_id == -1) { |
7685ee6a | 1300 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1301 | } else { |
1302 | se->instance_id = instance_id; | |
a672b469 | 1303 | } |
7685ee6a | 1304 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1305 | /* add at the end of list */ |
72cf2d4f | 1306 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1307 | return 0; |
1308 | } | |
1309 | ||
0be71e32 AW |
1310 | int register_savevm(DeviceState *dev, |
1311 | const char *idstr, | |
a672b469 AL |
1312 | int instance_id, |
1313 | int version_id, | |
1314 | SaveStateHandler *save_state, | |
1315 | LoadStateHandler *load_state, | |
1316 | void *opaque) | |
1317 | { | |
7908c78d JQ |
1318 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1319 | ops->save_state = save_state; | |
1320 | ops->load_state = load_state; | |
0be71e32 | 1321 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1322 | ops, opaque); |
a672b469 AL |
1323 | } |
1324 | ||
0be71e32 | 1325 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1326 | { |
8718e999 | 1327 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1328 | char id[256] = ""; |
1329 | ||
09e5ab63 AL |
1330 | if (dev) { |
1331 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1332 | if (path) { |
1333 | pstrcpy(id, sizeof(id), path); | |
1334 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1335 | g_free(path); |
7685ee6a AW |
1336 | } |
1337 | } | |
1338 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1339 | |
72cf2d4f | 1340 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1341 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1342 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1343 | if (se->compat) { |
7267c094 | 1344 | g_free(se->compat); |
69e58af9 | 1345 | } |
22ea40f4 | 1346 | g_free(se->ops); |
7267c094 | 1347 | g_free(se); |
41bd13af | 1348 | } |
41bd13af AL |
1349 | } |
1350 | } | |
1351 | ||
0be71e32 | 1352 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1353 | const VMStateDescription *vmsd, |
1354 | void *opaque, int alias_id, | |
1355 | int required_for_version) | |
9ed7d6ae | 1356 | { |
8718e999 | 1357 | SaveStateEntry *se; |
9ed7d6ae | 1358 | |
4d2ffa08 JK |
1359 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1360 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1361 | ||
7267c094 | 1362 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1363 | se->version_id = vmsd->version_id; |
1364 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1365 | se->opaque = opaque; |
1366 | se->vmsd = vmsd; | |
4d2ffa08 | 1367 | se->alias_id = alias_id; |
2837c8ea | 1368 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1369 | |
09e5ab63 AL |
1370 | if (dev) { |
1371 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1372 | if (id) { |
1373 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1374 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1375 | g_free(id); |
7685ee6a | 1376 | |
7267c094 | 1377 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1378 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1379 | se->compat->instance_id = instance_id == -1 ? | |
1380 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1381 | instance_id = -1; | |
1382 | } | |
1383 | } | |
1384 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1385 | ||
8718e999 | 1386 | if (instance_id == -1) { |
7685ee6a | 1387 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1388 | } else { |
1389 | se->instance_id = instance_id; | |
9ed7d6ae | 1390 | } |
7685ee6a | 1391 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1392 | /* add at the end of list */ |
72cf2d4f | 1393 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1394 | return 0; |
1395 | } | |
1396 | ||
0be71e32 AW |
1397 | int vmstate_register(DeviceState *dev, int instance_id, |
1398 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1399 | { |
0be71e32 AW |
1400 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1401 | opaque, -1, 0); | |
4d2ffa08 JK |
1402 | } |
1403 | ||
0be71e32 AW |
1404 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1405 | void *opaque) | |
9ed7d6ae | 1406 | { |
1eb7538b JQ |
1407 | SaveStateEntry *se, *new_se; |
1408 | ||
72cf2d4f | 1409 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1410 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1411 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1412 | if (se->compat) { |
7267c094 | 1413 | g_free(se->compat); |
69e58af9 | 1414 | } |
7267c094 | 1415 | g_free(se); |
1eb7538b JQ |
1416 | } |
1417 | } | |
9ed7d6ae JQ |
1418 | } |
1419 | ||
811814bd JQ |
1420 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1421 | void *opaque); | |
1422 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1423 | void *opaque); | |
1424 | ||
9ed7d6ae JQ |
1425 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1426 | void *opaque, int version_id) | |
1427 | { | |
1428 | VMStateField *field = vmsd->fields; | |
811814bd | 1429 | int ret; |
9ed7d6ae JQ |
1430 | |
1431 | if (version_id > vmsd->version_id) { | |
1432 | return -EINVAL; | |
1433 | } | |
1434 | if (version_id < vmsd->minimum_version_id_old) { | |
1435 | return -EINVAL; | |
1436 | } | |
1437 | if (version_id < vmsd->minimum_version_id) { | |
1438 | return vmsd->load_state_old(f, opaque, version_id); | |
1439 | } | |
fd4d52de JQ |
1440 | if (vmsd->pre_load) { |
1441 | int ret = vmsd->pre_load(opaque); | |
1442 | if (ret) | |
1443 | return ret; | |
1444 | } | |
9ed7d6ae | 1445 | while(field->name) { |
f11f6a5f JQ |
1446 | if ((field->field_exists && |
1447 | field->field_exists(opaque, version_id)) || | |
1448 | (!field->field_exists && | |
1449 | field->version_id <= version_id)) { | |
f752a6aa | 1450 | void *base_addr = opaque + field->offset; |
811814bd | 1451 | int i, n_elems = 1; |
e61a1e0a | 1452 | int size = field->size; |
9ed7d6ae | 1453 | |
e61a1e0a JQ |
1454 | if (field->flags & VMS_VBUFFER) { |
1455 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1456 | if (field->flags & VMS_MULTIPLY) { |
1457 | size *= field->size; | |
1458 | } | |
e61a1e0a | 1459 | } |
f752a6aa JQ |
1460 | if (field->flags & VMS_ARRAY) { |
1461 | n_elems = field->num; | |
d6698281 JQ |
1462 | } else if (field->flags & VMS_VARRAY_INT32) { |
1463 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1464 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1465 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1466 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1467 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1468 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1469 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1470 | } |
dde0463b | 1471 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1472 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1473 | } |
f752a6aa | 1474 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1475 | void *addr = base_addr + size * i; |
ec245e21 | 1476 | |
19df438b JQ |
1477 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1478 | addr = *(void **)addr; | |
1479 | } | |
ec245e21 | 1480 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1481 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1482 | } else { |
e61a1e0a | 1483 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1484 | |
1485 | } | |
f752a6aa JQ |
1486 | if (ret < 0) { |
1487 | return ret; | |
1488 | } | |
9ed7d6ae JQ |
1489 | } |
1490 | } | |
1491 | field++; | |
1492 | } | |
811814bd JQ |
1493 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1494 | if (ret != 0) { | |
1495 | return ret; | |
1496 | } | |
752ff2fa | 1497 | if (vmsd->post_load) { |
e59fb374 | 1498 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1499 | } |
9ed7d6ae JQ |
1500 | return 0; |
1501 | } | |
1502 | ||
1503 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1504 | void *opaque) |
9ed7d6ae JQ |
1505 | { |
1506 | VMStateField *field = vmsd->fields; | |
1507 | ||
8fb0791d JQ |
1508 | if (vmsd->pre_save) { |
1509 | vmsd->pre_save(opaque); | |
1510 | } | |
9ed7d6ae | 1511 | while(field->name) { |
f11f6a5f JQ |
1512 | if (!field->field_exists || |
1513 | field->field_exists(opaque, vmsd->version_id)) { | |
1514 | void *base_addr = opaque + field->offset; | |
1515 | int i, n_elems = 1; | |
e61a1e0a | 1516 | int size = field->size; |
dde0463b | 1517 | |
e61a1e0a JQ |
1518 | if (field->flags & VMS_VBUFFER) { |
1519 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1520 | if (field->flags & VMS_MULTIPLY) { |
1521 | size *= field->size; | |
1522 | } | |
e61a1e0a | 1523 | } |
f11f6a5f JQ |
1524 | if (field->flags & VMS_ARRAY) { |
1525 | n_elems = field->num; | |
d6698281 JQ |
1526 | } else if (field->flags & VMS_VARRAY_INT32) { |
1527 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1528 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1529 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1530 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1531 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1532 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1533 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1534 | } |
1535 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1536 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1537 | } |
1538 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1539 | void *addr = base_addr + size * i; |
ec245e21 | 1540 | |
8595387e JQ |
1541 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1542 | addr = *(void **)addr; | |
1543 | } | |
f11f6a5f JQ |
1544 | if (field->flags & VMS_STRUCT) { |
1545 | vmstate_save_state(f, field->vmsd, addr); | |
1546 | } else { | |
e61a1e0a | 1547 | field->info->put(f, addr, size); |
f11f6a5f | 1548 | } |
ec245e21 | 1549 | } |
dde0463b | 1550 | } |
9ed7d6ae JQ |
1551 | field++; |
1552 | } | |
811814bd | 1553 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1554 | } |
1555 | ||
4082be4d JQ |
1556 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1557 | { | |
9ed7d6ae | 1558 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1559 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1560 | } |
1561 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1562 | } |
1563 | ||
dc912121 | 1564 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1565 | { |
9ed7d6ae | 1566 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1567 | se->ops->save_state(f, se->opaque); |
dc912121 | 1568 | return; |
9ed7d6ae JQ |
1569 | } |
1570 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1571 | } |
1572 | ||
a672b469 AL |
1573 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1574 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1575 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1576 | ||
1577 | #define QEMU_VM_EOF 0x00 | |
1578 | #define QEMU_VM_SECTION_START 0x01 | |
1579 | #define QEMU_VM_SECTION_PART 0x02 | |
1580 | #define QEMU_VM_SECTION_END 0x03 | |
1581 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1582 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1583 | |
e1c37d0e | 1584 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1585 | { |
1586 | SaveStateEntry *se; | |
1587 | ||
1588 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1589 | if (se->no_migrate) { | |
e1c37d0e | 1590 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1591 | return true; |
1592 | } | |
1593 | } | |
1594 | return false; | |
1595 | } | |
1596 | ||
6607ae23 IY |
1597 | int qemu_savevm_state_begin(QEMUFile *f, |
1598 | const MigrationParams *params) | |
a672b469 AL |
1599 | { |
1600 | SaveStateEntry *se; | |
39346385 | 1601 | int ret; |
a672b469 | 1602 | |
c163b5ca | 1603 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1604 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1605 | continue; |
6607ae23 | 1606 | } |
22ea40f4 | 1607 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1608 | } |
1609 | ||
a672b469 AL |
1610 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1611 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1612 | ||
72cf2d4f | 1613 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1614 | int len; |
1615 | ||
d1315aac | 1616 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1617 | continue; |
22ea40f4 | 1618 | } |
6bd68781 JQ |
1619 | if (se->ops && se->ops->is_active) { |
1620 | if (!se->ops->is_active(se->opaque)) { | |
1621 | continue; | |
1622 | } | |
1623 | } | |
a672b469 AL |
1624 | /* Section type */ |
1625 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1626 | qemu_put_be32(f, se->section_id); | |
1627 | ||
1628 | /* ID string */ | |
1629 | len = strlen(se->idstr); | |
1630 | qemu_put_byte(f, len); | |
1631 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1632 | ||
1633 | qemu_put_be32(f, se->instance_id); | |
1634 | qemu_put_be32(f, se->version_id); | |
1635 | ||
d1315aac | 1636 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1637 | if (ret < 0) { |
539de124 | 1638 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1639 | return ret; |
1640 | } | |
a672b469 | 1641 | } |
624b9cc2 | 1642 | ret = qemu_file_get_error(f); |
39346385 | 1643 | if (ret != 0) { |
539de124 | 1644 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1645 | } |
a672b469 | 1646 | |
39346385 JQ |
1647 | return ret; |
1648 | ||
a672b469 AL |
1649 | } |
1650 | ||
39346385 | 1651 | /* |
07f35073 | 1652 | * this function has three return values: |
39346385 JQ |
1653 | * negative: there was one error, and we have -errno. |
1654 | * 0 : We haven't finished, caller have to go again | |
1655 | * 1 : We have finished, we can go to complete phase | |
1656 | */ | |
539de124 | 1657 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1658 | { |
1659 | SaveStateEntry *se; | |
1660 | int ret = 1; | |
1661 | ||
72cf2d4f | 1662 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1663 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1664 | continue; |
22ea40f4 | 1665 | } |
6bd68781 JQ |
1666 | if (se->ops && se->ops->is_active) { |
1667 | if (!se->ops->is_active(se->opaque)) { | |
1668 | continue; | |
1669 | } | |
1670 | } | |
aac844ed JQ |
1671 | if (qemu_file_rate_limit(f)) { |
1672 | return 0; | |
1673 | } | |
517a13c9 | 1674 | trace_savevm_section_start(); |
a672b469 AL |
1675 | /* Section type */ |
1676 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1677 | qemu_put_be32(f, se->section_id); | |
1678 | ||
16310a3c | 1679 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1680 | trace_savevm_section_end(se->section_id); |
1681 | ||
2975725f | 1682 | if (ret <= 0) { |
90697be8 JK |
1683 | /* Do not proceed to the next vmstate before this one reported |
1684 | completion of the current stage. This serializes the migration | |
1685 | and reduces the probability that a faster changing state is | |
1686 | synchronized over and over again. */ | |
1687 | break; | |
1688 | } | |
a672b469 | 1689 | } |
39346385 JQ |
1690 | if (ret != 0) { |
1691 | return ret; | |
1692 | } | |
624b9cc2 | 1693 | ret = qemu_file_get_error(f); |
39346385 | 1694 | if (ret != 0) { |
539de124 | 1695 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1696 | } |
39346385 | 1697 | return ret; |
a672b469 AL |
1698 | } |
1699 | ||
539de124 | 1700 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1701 | { |
1702 | SaveStateEntry *se; | |
2975725f | 1703 | int ret; |
a672b469 | 1704 | |
ea375f9a JK |
1705 | cpu_synchronize_all_states(); |
1706 | ||
72cf2d4f | 1707 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1708 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1709 | continue; |
22ea40f4 | 1710 | } |
6bd68781 JQ |
1711 | if (se->ops && se->ops->is_active) { |
1712 | if (!se->ops->is_active(se->opaque)) { | |
1713 | continue; | |
1714 | } | |
1715 | } | |
517a13c9 | 1716 | trace_savevm_section_start(); |
a672b469 AL |
1717 | /* Section type */ |
1718 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1719 | qemu_put_be32(f, se->section_id); | |
1720 | ||
16310a3c | 1721 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1722 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1723 | if (ret < 0) { |
1724 | return ret; | |
1725 | } | |
a672b469 AL |
1726 | } |
1727 | ||
72cf2d4f | 1728 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1729 | int len; |
1730 | ||
22ea40f4 | 1731 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1732 | continue; |
22ea40f4 | 1733 | } |
517a13c9 | 1734 | trace_savevm_section_start(); |
a672b469 AL |
1735 | /* Section type */ |
1736 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1737 | qemu_put_be32(f, se->section_id); | |
1738 | ||
1739 | /* ID string */ | |
1740 | len = strlen(se->idstr); | |
1741 | qemu_put_byte(f, len); | |
1742 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1743 | ||
1744 | qemu_put_be32(f, se->instance_id); | |
1745 | qemu_put_be32(f, se->version_id); | |
1746 | ||
dc912121 | 1747 | vmstate_save(f, se); |
517a13c9 | 1748 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1749 | } |
1750 | ||
1751 | qemu_put_byte(f, QEMU_VM_EOF); | |
1752 | ||
624b9cc2 | 1753 | return qemu_file_get_error(f); |
a672b469 AL |
1754 | } |
1755 | ||
e4ed1541 JQ |
1756 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1757 | { | |
1758 | SaveStateEntry *se; | |
1759 | uint64_t ret = 0; | |
1760 | ||
1761 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1762 | if (!se->ops || !se->ops->save_live_pending) { | |
1763 | continue; | |
1764 | } | |
1765 | if (se->ops && se->ops->is_active) { | |
1766 | if (!se->ops->is_active(se->opaque)) { | |
1767 | continue; | |
1768 | } | |
1769 | } | |
1770 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1771 | } | |
1772 | return ret; | |
1773 | } | |
1774 | ||
539de124 | 1775 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1776 | { |
1777 | SaveStateEntry *se; | |
1778 | ||
1779 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1780 | if (se->ops && se->ops->cancel) { |
1781 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1782 | } |
1783 | } | |
1784 | } | |
1785 | ||
e1c37d0e | 1786 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1787 | { |
a672b469 | 1788 | int ret; |
6607ae23 IY |
1789 | MigrationParams params = { |
1790 | .blk = 0, | |
1791 | .shared = 0 | |
1792 | }; | |
a672b469 | 1793 | |
e1c37d0e | 1794 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1795 | ret = -EINVAL; |
1796 | goto out; | |
1797 | } | |
1798 | ||
6607ae23 | 1799 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1800 | if (ret < 0) |
1801 | goto out; | |
1802 | ||
1803 | do { | |
539de124 | 1804 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1805 | if (ret < 0) |
1806 | goto out; | |
1807 | } while (ret == 0); | |
1808 | ||
539de124 | 1809 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1810 | |
1811 | out: | |
39346385 | 1812 | if (ret == 0) { |
624b9cc2 | 1813 | ret = qemu_file_get_error(f); |
39346385 | 1814 | } |
a672b469 | 1815 | |
a672b469 AL |
1816 | return ret; |
1817 | } | |
1818 | ||
a7ae8355 SS |
1819 | static int qemu_save_device_state(QEMUFile *f) |
1820 | { | |
1821 | SaveStateEntry *se; | |
1822 | ||
1823 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1824 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1825 | ||
1826 | cpu_synchronize_all_states(); | |
1827 | ||
1828 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1829 | int len; | |
1830 | ||
1831 | if (se->is_ram) { | |
1832 | continue; | |
1833 | } | |
22ea40f4 | 1834 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1835 | continue; |
1836 | } | |
1837 | ||
1838 | /* Section type */ | |
1839 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1840 | qemu_put_be32(f, se->section_id); | |
1841 | ||
1842 | /* ID string */ | |
1843 | len = strlen(se->idstr); | |
1844 | qemu_put_byte(f, len); | |
1845 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1846 | ||
1847 | qemu_put_be32(f, se->instance_id); | |
1848 | qemu_put_be32(f, se->version_id); | |
1849 | ||
1850 | vmstate_save(f, se); | |
1851 | } | |
1852 | ||
1853 | qemu_put_byte(f, QEMU_VM_EOF); | |
1854 | ||
1855 | return qemu_file_get_error(f); | |
1856 | } | |
1857 | ||
a672b469 AL |
1858 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1859 | { | |
1860 | SaveStateEntry *se; | |
1861 | ||
72cf2d4f | 1862 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1863 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1864 | (instance_id == se->instance_id || |
1865 | instance_id == se->alias_id)) | |
a672b469 | 1866 | return se; |
7685ee6a AW |
1867 | /* Migrating from an older version? */ |
1868 | if (strstr(se->idstr, idstr) && se->compat) { | |
1869 | if (!strcmp(se->compat->idstr, idstr) && | |
1870 | (instance_id == se->compat->instance_id || | |
1871 | instance_id == se->alias_id)) | |
1872 | return se; | |
1873 | } | |
a672b469 AL |
1874 | } |
1875 | return NULL; | |
1876 | } | |
1877 | ||
811814bd JQ |
1878 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1879 | { | |
1880 | while(sub && sub->needed) { | |
1881 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1882 | return sub->vmsd; | |
1883 | } | |
1884 | sub++; | |
1885 | } | |
1886 | return NULL; | |
1887 | } | |
1888 | ||
1889 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1890 | void *opaque) | |
1891 | { | |
c6380724 | 1892 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1893 | char idstr[256]; |
1894 | int ret; | |
c6380724 | 1895 | uint8_t version_id, len, size; |
811814bd JQ |
1896 | const VMStateDescription *sub_vmsd; |
1897 | ||
c6380724 JQ |
1898 | len = qemu_peek_byte(f, 1); |
1899 | if (len < strlen(vmsd->name) + 1) { | |
1900 | /* subsection name has be be "section_name/a" */ | |
1901 | return 0; | |
1902 | } | |
1903 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1904 | if (size != len) { | |
1905 | return 0; | |
1906 | } | |
1907 | idstr[size] = 0; | |
811814bd | 1908 | |
c6380724 JQ |
1909 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1910 | /* it don't have a valid subsection name */ | |
1911 | return 0; | |
1912 | } | |
3da9eebd | 1913 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1914 | if (sub_vmsd == NULL) { |
1915 | return -ENOENT; | |
1916 | } | |
c6380724 JQ |
1917 | qemu_file_skip(f, 1); /* subsection */ |
1918 | qemu_file_skip(f, 1); /* len */ | |
1919 | qemu_file_skip(f, len); /* idstr */ | |
1920 | version_id = qemu_get_be32(f); | |
1921 | ||
811814bd JQ |
1922 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1923 | if (ret) { | |
1924 | return ret; | |
1925 | } | |
1926 | } | |
1927 | return 0; | |
1928 | } | |
1929 | ||
1930 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1931 | void *opaque) | |
1932 | { | |
1933 | const VMStateSubsection *sub = vmsd->subsections; | |
1934 | ||
1935 | while (sub && sub->needed) { | |
1936 | if (sub->needed(opaque)) { | |
1937 | const VMStateDescription *vmsd = sub->vmsd; | |
1938 | uint8_t len; | |
1939 | ||
1940 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1941 | len = strlen(vmsd->name); | |
1942 | qemu_put_byte(f, len); | |
1943 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1944 | qemu_put_be32(f, vmsd->version_id); | |
1945 | vmstate_save_state(f, vmsd, opaque); | |
1946 | } | |
1947 | sub++; | |
1948 | } | |
1949 | } | |
1950 | ||
a672b469 | 1951 | typedef struct LoadStateEntry { |
72cf2d4f | 1952 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1953 | SaveStateEntry *se; |
1954 | int section_id; | |
1955 | int version_id; | |
a672b469 AL |
1956 | } LoadStateEntry; |
1957 | ||
a672b469 AL |
1958 | int qemu_loadvm_state(QEMUFile *f) |
1959 | { | |
72cf2d4f BS |
1960 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1961 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1962 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1963 | uint8_t section_type; |
1964 | unsigned int v; | |
1965 | int ret; | |
1966 | ||
e1c37d0e | 1967 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1968 | return -EINVAL; |
1969 | } | |
1970 | ||
a672b469 AL |
1971 | v = qemu_get_be32(f); |
1972 | if (v != QEMU_VM_FILE_MAGIC) | |
1973 | return -EINVAL; | |
1974 | ||
1975 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1976 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1977 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1978 | return -ENOTSUP; | |
1979 | } | |
a672b469 AL |
1980 | if (v != QEMU_VM_FILE_VERSION) |
1981 | return -ENOTSUP; | |
1982 | ||
1983 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1984 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1985 | SaveStateEntry *se; |
1986 | char idstr[257]; | |
1987 | int len; | |
1988 | ||
1989 | switch (section_type) { | |
1990 | case QEMU_VM_SECTION_START: | |
1991 | case QEMU_VM_SECTION_FULL: | |
1992 | /* Read section start */ | |
1993 | section_id = qemu_get_be32(f); | |
1994 | len = qemu_get_byte(f); | |
1995 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1996 | idstr[len] = 0; | |
1997 | instance_id = qemu_get_be32(f); | |
1998 | version_id = qemu_get_be32(f); | |
1999 | ||
2000 | /* Find savevm section */ | |
2001 | se = find_se(idstr, instance_id); | |
2002 | if (se == NULL) { | |
2003 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
2004 | ret = -EINVAL; | |
2005 | goto out; | |
2006 | } | |
2007 | ||
2008 | /* Validate version */ | |
2009 | if (version_id > se->version_id) { | |
2010 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
2011 | version_id, idstr, se->version_id); | |
2012 | ret = -EINVAL; | |
2013 | goto out; | |
2014 | } | |
2015 | ||
2016 | /* Add entry */ | |
7267c094 | 2017 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
2018 | |
2019 | le->se = se; | |
2020 | le->section_id = section_id; | |
2021 | le->version_id = version_id; | |
72cf2d4f | 2022 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2023 | |
4082be4d | 2024 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2025 | if (ret < 0) { |
2026 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2027 | instance_id, idstr); | |
2028 | goto out; | |
2029 | } | |
a672b469 AL |
2030 | break; |
2031 | case QEMU_VM_SECTION_PART: | |
2032 | case QEMU_VM_SECTION_END: | |
2033 | section_id = qemu_get_be32(f); | |
2034 | ||
72cf2d4f | 2035 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2036 | if (le->section_id == section_id) { |
2037 | break; | |
2038 | } | |
2039 | } | |
a672b469 AL |
2040 | if (le == NULL) { |
2041 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2042 | ret = -EINVAL; | |
2043 | goto out; | |
2044 | } | |
2045 | ||
4082be4d | 2046 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2047 | if (ret < 0) { |
2048 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2049 | section_id); | |
2050 | goto out; | |
2051 | } | |
a672b469 AL |
2052 | break; |
2053 | default: | |
2054 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2055 | ret = -EINVAL; | |
2056 | goto out; | |
2057 | } | |
2058 | } | |
2059 | ||
ea375f9a JK |
2060 | cpu_synchronize_all_post_init(); |
2061 | ||
a672b469 AL |
2062 | ret = 0; |
2063 | ||
2064 | out: | |
72cf2d4f BS |
2065 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2066 | QLIST_REMOVE(le, entry); | |
7267c094 | 2067 | g_free(le); |
a672b469 AL |
2068 | } |
2069 | ||
42802d47 JQ |
2070 | if (ret == 0) { |
2071 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2072 | } |
a672b469 AL |
2073 | |
2074 | return ret; | |
2075 | } | |
2076 | ||
a672b469 AL |
2077 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2078 | const char *name) | |
2079 | { | |
2080 | QEMUSnapshotInfo *sn_tab, *sn; | |
2081 | int nb_sns, i, ret; | |
2082 | ||
2083 | ret = -ENOENT; | |
2084 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2085 | if (nb_sns < 0) | |
2086 | return ret; | |
2087 | for(i = 0; i < nb_sns; i++) { | |
2088 | sn = &sn_tab[i]; | |
2089 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2090 | *sn_info = *sn; | |
2091 | ret = 0; | |
2092 | break; | |
2093 | } | |
2094 | } | |
7267c094 | 2095 | g_free(sn_tab); |
a672b469 AL |
2096 | return ret; |
2097 | } | |
2098 | ||
cb499fb2 KW |
2099 | /* |
2100 | * Deletes snapshots of a given name in all opened images. | |
2101 | */ | |
2102 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2103 | { | |
2104 | BlockDriverState *bs; | |
cb499fb2 KW |
2105 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2106 | int ret; | |
2107 | ||
dbc13590 MA |
2108 | bs = NULL; |
2109 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2110 | if (bdrv_can_snapshot(bs) && |
2111 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2112 | { | |
2113 | ret = bdrv_snapshot_delete(bs, name); | |
2114 | if (ret < 0) { | |
2115 | monitor_printf(mon, | |
2116 | "Error while deleting snapshot on '%s'\n", | |
2117 | bdrv_get_device_name(bs)); | |
2118 | return -1; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | return 0; | |
2124 | } | |
2125 | ||
d54908a5 | 2126 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2127 | { |
2128 | BlockDriverState *bs, *bs1; | |
2129 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2130 | int ret; |
a672b469 AL |
2131 | QEMUFile *f; |
2132 | int saved_vm_running; | |
c2c9a466 | 2133 | uint64_t vm_state_size; |
a672b469 AL |
2134 | #ifdef _WIN32 |
2135 | struct _timeb tb; | |
7d631a11 | 2136 | struct tm *ptm; |
a672b469 AL |
2137 | #else |
2138 | struct timeval tv; | |
7d631a11 | 2139 | struct tm tm; |
a672b469 | 2140 | #endif |
d54908a5 | 2141 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2142 | |
feeee5ac | 2143 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2144 | bs = NULL; |
2145 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2146 | |
07b70bfb | 2147 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2148 | continue; |
2149 | } | |
2150 | ||
2151 | if (!bdrv_can_snapshot(bs)) { | |
2152 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2153 | bdrv_get_device_name(bs)); | |
2154 | return; | |
2155 | } | |
2156 | } | |
2157 | ||
f9092b10 | 2158 | bs = bdrv_snapshots(); |
a672b469 | 2159 | if (!bs) { |
376253ec | 2160 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2161 | return; |
2162 | } | |
a672b469 | 2163 | |
1354869c | 2164 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2165 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2166 | |
cb499fb2 | 2167 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2168 | |
2169 | /* fill auxiliary fields */ | |
2170 | #ifdef _WIN32 | |
2171 | _ftime(&tb); | |
2172 | sn->date_sec = tb.time; | |
2173 | sn->date_nsec = tb.millitm * 1000000; | |
2174 | #else | |
2175 | gettimeofday(&tv, NULL); | |
2176 | sn->date_sec = tv.tv_sec; | |
2177 | sn->date_nsec = tv.tv_usec * 1000; | |
2178 | #endif | |
74475455 | 2179 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2180 | |
7d631a11 MDCF |
2181 | if (name) { |
2182 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2183 | if (ret >= 0) { | |
2184 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2185 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2186 | } else { | |
2187 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2188 | } | |
2189 | } else { | |
2190 | #ifdef _WIN32 | |
55dd9ffa SW |
2191 | time_t t = tb.time; |
2192 | ptm = localtime(&t); | |
7d631a11 MDCF |
2193 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2194 | #else | |
d7d9b528 BS |
2195 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2196 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2197 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2198 | #endif | |
2199 | } | |
2200 | ||
cb499fb2 | 2201 | /* Delete old snapshots of the same name */ |
f139a412 | 2202 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2203 | goto the_end; |
2204 | } | |
2205 | ||
a672b469 | 2206 | /* save the VM state */ |
45566e9c | 2207 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2208 | if (!f) { |
376253ec | 2209 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2210 | goto the_end; |
2211 | } | |
e1c37d0e | 2212 | ret = qemu_savevm_state(f); |
2d22b18f | 2213 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2214 | qemu_fclose(f); |
2215 | if (ret < 0) { | |
376253ec | 2216 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2217 | goto the_end; |
2218 | } | |
2219 | ||
2220 | /* create the snapshots */ | |
2221 | ||
dbc13590 MA |
2222 | bs1 = NULL; |
2223 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2224 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2225 | /* Write VM state size only to the image that contains the state */ |
2226 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2227 | ret = bdrv_snapshot_create(bs1, sn); |
2228 | if (ret < 0) { | |
376253ec AL |
2229 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2230 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2231 | } |
2232 | } | |
2233 | } | |
2234 | ||
2235 | the_end: | |
2236 | if (saved_vm_running) | |
2237 | vm_start(); | |
2238 | } | |
2239 | ||
a7ae8355 SS |
2240 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2241 | { | |
2242 | QEMUFile *f; | |
2243 | int saved_vm_running; | |
2244 | int ret; | |
2245 | ||
2246 | saved_vm_running = runstate_is_running(); | |
2247 | vm_stop(RUN_STATE_SAVE_VM); | |
2248 | ||
2249 | f = qemu_fopen(filename, "wb"); | |
2250 | if (!f) { | |
2251 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2252 | goto the_end; | |
2253 | } | |
2254 | ret = qemu_save_device_state(f); | |
2255 | qemu_fclose(f); | |
2256 | if (ret < 0) { | |
2257 | error_set(errp, QERR_IO_ERROR); | |
2258 | } | |
2259 | ||
2260 | the_end: | |
2261 | if (saved_vm_running) | |
2262 | vm_start(); | |
a7ae8355 SS |
2263 | } |
2264 | ||
03cd4655 | 2265 | int load_vmstate(const char *name) |
a672b469 | 2266 | { |
f0aa7a8b | 2267 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2268 | QEMUSnapshotInfo sn; |
a672b469 | 2269 | QEMUFile *f; |
751c6a17 | 2270 | int ret; |
a672b469 | 2271 | |
f0aa7a8b MDCF |
2272 | bs_vm_state = bdrv_snapshots(); |
2273 | if (!bs_vm_state) { | |
2274 | error_report("No block device supports snapshots"); | |
2275 | return -ENOTSUP; | |
2276 | } | |
2277 | ||
2278 | /* Don't even try to load empty VM states */ | |
2279 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2280 | if (ret < 0) { | |
2281 | return ret; | |
2282 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2283 | error_report("This is a disk-only snapshot. Revert to it offline " |
2284 | "using qemu-img."); | |
f0aa7a8b MDCF |
2285 | return -EINVAL; |
2286 | } | |
2287 | ||
2288 | /* Verify if there is any device that doesn't support snapshots and is | |
2289 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2290 | bs = NULL; |
2291 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2292 | |
07b70bfb | 2293 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2294 | continue; |
2295 | } | |
2296 | ||
2297 | if (!bdrv_can_snapshot(bs)) { | |
2298 | error_report("Device '%s' is writable but does not support snapshots.", | |
2299 | bdrv_get_device_name(bs)); | |
2300 | return -ENOTSUP; | |
2301 | } | |
feeee5ac | 2302 | |
f0aa7a8b MDCF |
2303 | ret = bdrv_snapshot_find(bs, &sn, name); |
2304 | if (ret < 0) { | |
2305 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2306 | bdrv_get_device_name(bs), name); | |
2307 | return ret; | |
2308 | } | |
a672b469 AL |
2309 | } |
2310 | ||
2311 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2312 | bdrv_drain_all(); |
a672b469 | 2313 | |
f0aa7a8b MDCF |
2314 | bs = NULL; |
2315 | while ((bs = bdrv_next(bs))) { | |
2316 | if (bdrv_can_snapshot(bs)) { | |
2317 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2318 | if (ret < 0) { |
f0aa7a8b MDCF |
2319 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2320 | ret, name, bdrv_get_device_name(bs)); | |
2321 | return ret; | |
a672b469 AL |
2322 | } |
2323 | } | |
2324 | } | |
2325 | ||
a672b469 | 2326 | /* restore the VM state */ |
f0aa7a8b | 2327 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2328 | if (!f) { |
1ecda02b | 2329 | error_report("Could not open VM state file"); |
05f2401e | 2330 | return -EINVAL; |
a672b469 | 2331 | } |
f0aa7a8b | 2332 | |
5a8a49d7 | 2333 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2334 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2335 | |
a672b469 AL |
2336 | qemu_fclose(f); |
2337 | if (ret < 0) { | |
1ecda02b | 2338 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2339 | return ret; |
a672b469 | 2340 | } |
f0aa7a8b | 2341 | |
05f2401e | 2342 | return 0; |
7b630349 JQ |
2343 | } |
2344 | ||
d54908a5 | 2345 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2346 | { |
2347 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2348 | int ret; |
d54908a5 | 2349 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2350 | |
f9092b10 | 2351 | bs = bdrv_snapshots(); |
a672b469 | 2352 | if (!bs) { |
376253ec | 2353 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2354 | return; |
2355 | } | |
2356 | ||
dbc13590 MA |
2357 | bs1 = NULL; |
2358 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2359 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2360 | ret = bdrv_snapshot_delete(bs1, name); |
2361 | if (ret < 0) { | |
2362 | if (ret == -ENOTSUP) | |
376253ec AL |
2363 | monitor_printf(mon, |
2364 | "Snapshots not supported on device '%s'\n", | |
2365 | bdrv_get_device_name(bs1)); | |
a672b469 | 2366 | else |
376253ec AL |
2367 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2368 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2369 | } |
2370 | } | |
2371 | } | |
2372 | } | |
2373 | ||
376253ec | 2374 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2375 | { |
2376 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2377 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2378 | int nb_sns, i, ret, available; | |
2379 | int total; | |
2380 | int *available_snapshots; | |
a672b469 AL |
2381 | char buf[256]; |
2382 | ||
f9092b10 | 2383 | bs = bdrv_snapshots(); |
a672b469 | 2384 | if (!bs) { |
376253ec | 2385 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2386 | return; |
2387 | } | |
a672b469 AL |
2388 | |
2389 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2390 | if (nb_sns < 0) { | |
376253ec | 2391 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2392 | return; |
2393 | } | |
f9209915 MDCF |
2394 | |
2395 | if (nb_sns == 0) { | |
2396 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2397 | return; | |
2398 | } | |
2399 | ||
7267c094 | 2400 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2401 | total = 0; |
2402 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2403 | sn = &sn_tab[i]; |
f9209915 MDCF |
2404 | available = 1; |
2405 | bs1 = NULL; | |
2406 | ||
2407 | while ((bs1 = bdrv_next(bs1))) { | |
2408 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2409 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2410 | if (ret < 0) { | |
2411 | available = 0; | |
2412 | break; | |
2413 | } | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | if (available) { | |
2418 | available_snapshots[total] = i; | |
2419 | total++; | |
2420 | } | |
a672b469 | 2421 | } |
f9209915 MDCF |
2422 | |
2423 | if (total > 0) { | |
2424 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2425 | for (i = 0; i < total; i++) { | |
2426 | sn = &sn_tab[available_snapshots[i]]; | |
2427 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2428 | } | |
2429 | } else { | |
2430 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2431 | } | |
2432 | ||
7267c094 AL |
2433 | g_free(sn_tab); |
2434 | g_free(available_snapshots); | |
f9209915 | 2435 | |
a672b469 | 2436 | } |
c5705a77 AK |
2437 | |
2438 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2439 | { | |
1ddde087 | 2440 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2441 | memory_region_name(mr), dev); |
2442 | } | |
2443 | ||
2444 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2445 | { | |
2446 | /* Nothing do to while the implementation is in RAMBlock */ | |
2447 | } | |
2448 | ||
2449 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2450 | { | |
2451 | vmstate_register_ram(mr, NULL); | |
2452 | } | |
302dfbeb OW |
2453 | |
2454 | /* | |
2455 | page = zrun nzrun | |
2456 | | zrun nzrun page | |
2457 | ||
2458 | zrun = length | |
2459 | ||
2460 | nzrun = length byte... | |
2461 | ||
2462 | length = uleb128 encoded integer | |
2463 | */ | |
2464 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2465 | uint8_t *dst, int dlen) | |
2466 | { | |
2467 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2468 | int d = 0, i = 0; | |
2469 | long res, xor; | |
2470 | uint8_t *nzrun_start = NULL; | |
2471 | ||
2472 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2473 | sizeof(long))); | |
2474 | ||
2475 | while (i < slen) { | |
2476 | /* overflow */ | |
2477 | if (d + 2 > dlen) { | |
2478 | return -1; | |
2479 | } | |
2480 | ||
2481 | /* not aligned to sizeof(long) */ | |
2482 | res = (slen - i) % sizeof(long); | |
2483 | while (res && old_buf[i] == new_buf[i]) { | |
2484 | zrun_len++; | |
2485 | i++; | |
2486 | res--; | |
2487 | } | |
2488 | ||
2489 | /* word at a time for speed */ | |
2490 | if (!res) { | |
2491 | while (i < slen && | |
2492 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2493 | i += sizeof(long); | |
2494 | zrun_len += sizeof(long); | |
2495 | } | |
2496 | ||
2497 | /* go over the rest */ | |
2498 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2499 | zrun_len++; | |
2500 | i++; | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | /* buffer unchanged */ | |
2505 | if (zrun_len == slen) { | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | /* skip last zero run */ | |
2510 | if (i == slen) { | |
2511 | return d; | |
2512 | } | |
2513 | ||
2514 | d += uleb128_encode_small(dst + d, zrun_len); | |
2515 | ||
2516 | zrun_len = 0; | |
2517 | nzrun_start = new_buf + i; | |
2518 | ||
2519 | /* overflow */ | |
2520 | if (d + 2 > dlen) { | |
2521 | return -1; | |
2522 | } | |
2523 | /* not aligned to sizeof(long) */ | |
2524 | res = (slen - i) % sizeof(long); | |
2525 | while (res && old_buf[i] != new_buf[i]) { | |
2526 | i++; | |
2527 | nzrun_len++; | |
2528 | res--; | |
2529 | } | |
2530 | ||
2531 | /* word at a time for speed, use of 32-bit long okay */ | |
2532 | if (!res) { | |
2533 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2534 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2535 | while (i < slen) { |
2536 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2537 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2538 | /* found the end of an nzrun within the current long */ | |
2539 | while (old_buf[i] != new_buf[i]) { | |
2540 | nzrun_len++; | |
2541 | i++; | |
2542 | } | |
2543 | break; | |
2544 | } else { | |
2545 | i += sizeof(long); | |
2546 | nzrun_len += sizeof(long); | |
2547 | } | |
2548 | } | |
2549 | } | |
2550 | ||
2551 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2552 | /* overflow */ | |
2553 | if (d + nzrun_len > dlen) { | |
2554 | return -1; | |
2555 | } | |
2556 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2557 | d += nzrun_len; | |
2558 | nzrun_len = 0; | |
2559 | } | |
2560 | ||
2561 | return d; | |
2562 | } | |
2563 | ||
2564 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2565 | { | |
2566 | int i = 0, d = 0; | |
2567 | int ret; | |
2568 | uint32_t count = 0; | |
2569 | ||
2570 | while (i < slen) { | |
2571 | ||
2572 | /* zrun */ | |
2573 | if ((slen - i) < 2) { | |
2574 | return -1; | |
2575 | } | |
2576 | ||
2577 | ret = uleb128_decode_small(src + i, &count); | |
2578 | if (ret < 0 || (i && !count)) { | |
2579 | return -1; | |
2580 | } | |
2581 | i += ret; | |
2582 | d += count; | |
2583 | ||
2584 | /* overflow */ | |
2585 | if (d > dlen) { | |
2586 | return -1; | |
2587 | } | |
2588 | ||
2589 | /* nzrun */ | |
2590 | if ((slen - i) < 2) { | |
2591 | return -1; | |
2592 | } | |
2593 | ||
2594 | ret = uleb128_decode_small(src + i, &count); | |
2595 | if (ret < 0 || !count) { | |
2596 | return -1; | |
2597 | } | |
2598 | i += ret; | |
2599 | ||
2600 | /* overflow */ | |
2601 | if (d + count > dlen || i + count > slen) { | |
2602 | return -1; | |
2603 | } | |
2604 | ||
2605 | memcpy(dst + d, src + i, count); | |
2606 | d += count; | |
2607 | i += count; | |
2608 | } | |
2609 | ||
2610 | return d; | |
2611 | } |