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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 | ||
191 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
192 | { | |
193 | QEMUFileSocket *s = opaque; | |
194 | ssize_t len; | |
195 | ||
196 | do { | |
00aa0040 | 197 | len = qemu_recv(s->fd, buf, size, 0); |
a672b469 AL |
198 | } while (len == -1 && socket_error() == EINTR); |
199 | ||
200 | if (len == -1) | |
201 | len = -socket_error(); | |
202 | ||
203 | return len; | |
204 | } | |
205 | ||
206 | static int socket_close(void *opaque) | |
207 | { | |
208 | QEMUFileSocket *s = opaque; | |
7267c094 | 209 | g_free(s); |
a672b469 AL |
210 | return 0; |
211 | } | |
212 | ||
7f79dd28 | 213 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 214 | { |
7f79dd28 PB |
215 | QEMUFileStdio *s = opaque; |
216 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
217 | } |
218 | ||
7f79dd28 | 219 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 220 | { |
7f79dd28 PB |
221 | QEMUFileStdio *s = opaque; |
222 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
223 | int bytes; |
224 | ||
225 | do { | |
226 | clearerr(fp); | |
227 | bytes = fread(buf, 1, size, fp); | |
228 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); | |
229 | return bytes; | |
a672b469 AL |
230 | } |
231 | ||
7f79dd28 PB |
232 | static int stdio_pclose(void *opaque) |
233 | { | |
234 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
235 | int ret; |
236 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
237 | if (ret == -1) { |
238 | ret = -errno; | |
239 | } | |
7267c094 | 240 | g_free(s); |
41ef56e6 | 241 | return ret; |
7f79dd28 PB |
242 | } |
243 | ||
244 | static int stdio_fclose(void *opaque) | |
a672b469 | 245 | { |
7f79dd28 | 246 | QEMUFileStdio *s = opaque; |
0e286705 EH |
247 | int ret = 0; |
248 | if (fclose(s->stdio_file) == EOF) { | |
249 | ret = -errno; | |
250 | } | |
7267c094 | 251 | g_free(s); |
0e286705 | 252 | return ret; |
a672b469 AL |
253 | } |
254 | ||
9229bf3c PB |
255 | static const QEMUFileOps stdio_pipe_read_ops = { |
256 | .get_buffer = stdio_get_buffer, | |
257 | .close = stdio_pclose | |
258 | }; | |
259 | ||
260 | static const QEMUFileOps stdio_pipe_write_ops = { | |
261 | .put_buffer = stdio_put_buffer, | |
262 | .close = stdio_pclose | |
263 | }; | |
264 | ||
7f79dd28 | 265 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 266 | { |
7f79dd28 | 267 | QEMUFileStdio *s; |
a672b469 | 268 | |
7f79dd28 | 269 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
270 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
271 | return NULL; | |
272 | } | |
273 | ||
7267c094 | 274 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 275 | |
7f79dd28 | 276 | s->stdio_file = stdio_file; |
a672b469 AL |
277 | |
278 | if(mode[0] == 'r') { | |
9229bf3c | 279 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 280 | } else { |
9229bf3c | 281 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 282 | } |
a672b469 AL |
283 | return s->file; |
284 | } | |
285 | ||
286 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
287 | { | |
288 | FILE *popen_file; | |
289 | ||
290 | popen_file = popen(command, mode); | |
291 | if(popen_file == NULL) { | |
292 | return NULL; | |
293 | } | |
294 | ||
295 | return qemu_popen(popen_file, mode); | |
296 | } | |
297 | ||
7f79dd28 | 298 | int qemu_stdio_fd(QEMUFile *f) |
8a43b1ea | 299 | { |
7f79dd28 | 300 | QEMUFileStdio *p; |
8a43b1ea CL |
301 | int fd; |
302 | ||
7f79dd28 PB |
303 | p = (QEMUFileStdio *)f->opaque; |
304 | fd = fileno(p->stdio_file); | |
8a43b1ea CL |
305 | |
306 | return fd; | |
307 | } | |
308 | ||
9229bf3c PB |
309 | static const QEMUFileOps stdio_file_read_ops = { |
310 | .get_buffer = stdio_get_buffer, | |
311 | .close = stdio_fclose | |
312 | }; | |
313 | ||
314 | static const QEMUFileOps stdio_file_write_ops = { | |
315 | .put_buffer = stdio_put_buffer, | |
316 | .close = stdio_fclose | |
317 | }; | |
318 | ||
5ac1fad3 PB |
319 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
320 | { | |
321 | QEMUFileStdio *s; | |
322 | ||
323 | if (mode == NULL || | |
324 | (mode[0] != 'r' && mode[0] != 'w') || | |
325 | mode[1] != 'b' || mode[2] != 0) { | |
326 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
327 | return NULL; | |
328 | } | |
329 | ||
7267c094 | 330 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
331 | s->stdio_file = fdopen(fd, mode); |
332 | if (!s->stdio_file) | |
333 | goto fail; | |
334 | ||
335 | if(mode[0] == 'r') { | |
9229bf3c | 336 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 337 | } else { |
9229bf3c | 338 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
339 | } |
340 | return s->file; | |
341 | ||
342 | fail: | |
7267c094 | 343 | g_free(s); |
5ac1fad3 PB |
344 | return NULL; |
345 | } | |
346 | ||
9229bf3c PB |
347 | static const QEMUFileOps socket_read_ops = { |
348 | .get_buffer = socket_get_buffer, | |
349 | .close = socket_close | |
350 | }; | |
351 | ||
a672b469 AL |
352 | QEMUFile *qemu_fopen_socket(int fd) |
353 | { | |
7267c094 | 354 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 355 | |
a672b469 | 356 | s->fd = fd; |
9229bf3c | 357 | s->file = qemu_fopen_ops(s, &socket_read_ops); |
a672b469 AL |
358 | return s->file; |
359 | } | |
360 | ||
a672b469 AL |
361 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
362 | { | |
363 | QEMUFileStdio *s; | |
364 | ||
7f79dd28 PB |
365 | if (mode == NULL || |
366 | (mode[0] != 'r' && mode[0] != 'w') || | |
367 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 368 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
369 | return NULL; |
370 | } | |
371 | ||
7267c094 | 372 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 373 | |
7f79dd28 PB |
374 | s->stdio_file = fopen(filename, mode); |
375 | if (!s->stdio_file) | |
a672b469 | 376 | goto fail; |
c163b5ca | 377 | |
7f79dd28 | 378 | if(mode[0] == 'w') { |
9229bf3c | 379 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 380 | } else { |
9229bf3c | 381 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
382 | } |
383 | return s->file; | |
a672b469 | 384 | fail: |
7267c094 | 385 | g_free(s); |
a672b469 AL |
386 | return NULL; |
387 | } | |
388 | ||
178e08a5 | 389 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
390 | int64_t pos, int size) |
391 | { | |
45566e9c | 392 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
393 | return size; |
394 | } | |
395 | ||
178e08a5 | 396 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 397 | { |
45566e9c | 398 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
399 | } |
400 | ||
401 | static int bdrv_fclose(void *opaque) | |
402 | { | |
ad492c92 | 403 | return bdrv_flush(opaque); |
a672b469 AL |
404 | } |
405 | ||
9229bf3c PB |
406 | static const QEMUFileOps bdrv_read_ops = { |
407 | .get_buffer = block_get_buffer, | |
408 | .close = bdrv_fclose | |
409 | }; | |
410 | ||
411 | static const QEMUFileOps bdrv_write_ops = { | |
412 | .put_buffer = block_put_buffer, | |
413 | .close = bdrv_fclose | |
414 | }; | |
415 | ||
45566e9c | 416 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 417 | { |
a672b469 | 418 | if (is_writable) |
9229bf3c PB |
419 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
420 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
421 | } |
422 | ||
9229bf3c | 423 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
424 | { |
425 | QEMUFile *f; | |
426 | ||
7267c094 | 427 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
428 | |
429 | f->opaque = opaque; | |
9229bf3c | 430 | f->ops = ops; |
a672b469 AL |
431 | f->is_write = 0; |
432 | ||
433 | return f; | |
434 | } | |
435 | ||
624b9cc2 | 436 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 437 | { |
3961b4dd | 438 | return f->last_error; |
a672b469 AL |
439 | } |
440 | ||
6f121ff5 | 441 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 442 | { |
3961b4dd | 443 | f->last_error = ret; |
4dabe248 AL |
444 | } |
445 | ||
d82ca915 EH |
446 | /** Flushes QEMUFile buffer |
447 | * | |
d82ca915 | 448 | */ |
7311bea3 | 449 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 450 | { |
7311bea3 JQ |
451 | int ret = 0; |
452 | ||
9229bf3c | 453 | if (!f->ops->put_buffer) |
7311bea3 | 454 | return 0; |
a672b469 AL |
455 | |
456 | if (f->is_write && f->buf_index > 0) { | |
9229bf3c | 457 | ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
7311bea3 | 458 | if (ret >= 0) { |
a672b469 | 459 | f->buf_offset += f->buf_index; |
7311bea3 | 460 | } |
a672b469 AL |
461 | f->buf_index = 0; |
462 | } | |
7311bea3 | 463 | return ret; |
a672b469 AL |
464 | } |
465 | ||
466 | static void qemu_fill_buffer(QEMUFile *f) | |
467 | { | |
468 | int len; | |
0046c45b | 469 | int pending; |
a672b469 | 470 | |
9229bf3c | 471 | if (!f->ops->get_buffer) |
a672b469 AL |
472 | return; |
473 | ||
474 | if (f->is_write) | |
475 | abort(); | |
476 | ||
0046c45b JQ |
477 | pending = f->buf_size - f->buf_index; |
478 | if (pending > 0) { | |
479 | memmove(f->buf, f->buf + f->buf_index, pending); | |
480 | } | |
481 | f->buf_index = 0; | |
482 | f->buf_size = pending; | |
483 | ||
9229bf3c | 484 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
0046c45b | 485 | IO_BUF_SIZE - pending); |
a672b469 | 486 | if (len > 0) { |
0046c45b | 487 | f->buf_size += len; |
a672b469 | 488 | f->buf_offset += len; |
fa39a30f | 489 | } else if (len == 0) { |
02c4a051 | 490 | qemu_file_set_error(f, -EIO); |
a672b469 | 491 | } else if (len != -EAGAIN) |
c29110d5 | 492 | qemu_file_set_error(f, len); |
a672b469 AL |
493 | } |
494 | ||
d82ca915 EH |
495 | /** Closes the file |
496 | * | |
497 | * Returns negative error value if any error happened on previous operations or | |
498 | * while closing the file. Returns 0 or positive number on success. | |
499 | * | |
500 | * The meaning of return value on success depends on the specific backend | |
501 | * being used. | |
502 | */ | |
503 | int qemu_fclose(QEMUFile *f) | |
504 | { | |
29eee86f | 505 | int ret; |
7311bea3 | 506 | ret = qemu_fflush(f); |
7311bea3 | 507 | |
9229bf3c PB |
508 | if (f->ops->close) { |
509 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
510 | if (ret >= 0) { |
511 | ret = ret2; | |
512 | } | |
7311bea3 | 513 | } |
d82ca915 EH |
514 | /* If any error was spotted before closing, we should report it |
515 | * instead of the close() return value. | |
516 | */ | |
517 | if (f->last_error) { | |
518 | ret = f->last_error; | |
519 | } | |
7267c094 | 520 | g_free(f); |
a672b469 AL |
521 | return ret; |
522 | } | |
523 | ||
a2b41351 | 524 | int qemu_file_put_notify(QEMUFile *f) |
a672b469 | 525 | { |
9229bf3c | 526 | return f->ops->put_buffer(f->opaque, NULL, 0, 0); |
a672b469 AL |
527 | } |
528 | ||
529 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
530 | { | |
531 | int l; | |
532 | ||
c10682cb JQ |
533 | if (f->last_error) { |
534 | return; | |
535 | } | |
536 | ||
537 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
538 | fprintf(stderr, |
539 | "Attempted to write to buffer while read buffer is not empty\n"); | |
540 | abort(); | |
541 | } | |
542 | ||
c10682cb | 543 | while (size > 0) { |
a672b469 AL |
544 | l = IO_BUF_SIZE - f->buf_index; |
545 | if (l > size) | |
546 | l = size; | |
547 | memcpy(f->buf + f->buf_index, buf, l); | |
548 | f->is_write = 1; | |
549 | f->buf_index += l; | |
550 | buf += l; | |
551 | size -= l; | |
7311bea3 JQ |
552 | if (f->buf_index >= IO_BUF_SIZE) { |
553 | int ret = qemu_fflush(f); | |
c10682cb JQ |
554 | if (ret < 0) { |
555 | qemu_file_set_error(f, ret); | |
556 | break; | |
557 | } | |
7311bea3 | 558 | } |
a672b469 AL |
559 | } |
560 | } | |
561 | ||
562 | void qemu_put_byte(QEMUFile *f, int v) | |
563 | { | |
c10682cb JQ |
564 | if (f->last_error) { |
565 | return; | |
566 | } | |
567 | ||
568 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
569 | fprintf(stderr, |
570 | "Attempted to write to buffer while read buffer is not empty\n"); | |
571 | abort(); | |
572 | } | |
573 | ||
574 | f->buf[f->buf_index++] = v; | |
575 | f->is_write = 1; | |
7311bea3 JQ |
576 | if (f->buf_index >= IO_BUF_SIZE) { |
577 | int ret = qemu_fflush(f); | |
c10682cb JQ |
578 | if (ret < 0) { |
579 | qemu_file_set_error(f, ret); | |
580 | } | |
7311bea3 | 581 | } |
a672b469 AL |
582 | } |
583 | ||
c6380724 | 584 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 585 | { |
c6380724 JQ |
586 | if (f->buf_index + size <= f->buf_size) { |
587 | f->buf_index += size; | |
588 | } | |
589 | } | |
590 | ||
591 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 592 | { |
c6380724 JQ |
593 | int pending; |
594 | int index; | |
a672b469 | 595 | |
b9ce1454 | 596 | if (f->is_write) { |
a672b469 | 597 | abort(); |
b9ce1454 | 598 | } |
a672b469 | 599 | |
c6380724 JQ |
600 | index = f->buf_index + offset; |
601 | pending = f->buf_size - index; | |
602 | if (pending < size) { | |
603 | qemu_fill_buffer(f); | |
604 | index = f->buf_index + offset; | |
605 | pending = f->buf_size - index; | |
606 | } | |
607 | ||
608 | if (pending <= 0) { | |
609 | return 0; | |
610 | } | |
611 | if (size > pending) { | |
612 | size = pending; | |
613 | } | |
614 | ||
615 | memcpy(buf, f->buf + index, size); | |
616 | return size; | |
617 | } | |
618 | ||
619 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
620 | { | |
621 | int pending = size; | |
622 | int done = 0; | |
623 | ||
624 | while (pending > 0) { | |
625 | int res; | |
626 | ||
627 | res = qemu_peek_buffer(f, buf, pending, 0); | |
628 | if (res == 0) { | |
629 | return done; | |
a672b469 | 630 | } |
c6380724 JQ |
631 | qemu_file_skip(f, res); |
632 | buf += res; | |
633 | pending -= res; | |
634 | done += res; | |
a672b469 | 635 | } |
c6380724 | 636 | return done; |
a672b469 AL |
637 | } |
638 | ||
c6380724 | 639 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 640 | { |
c6380724 JQ |
641 | int index = f->buf_index + offset; |
642 | ||
b9ce1454 | 643 | if (f->is_write) { |
811814bd | 644 | abort(); |
b9ce1454 | 645 | } |
811814bd | 646 | |
c6380724 | 647 | if (index >= f->buf_size) { |
811814bd | 648 | qemu_fill_buffer(f); |
c6380724 JQ |
649 | index = f->buf_index + offset; |
650 | if (index >= f->buf_size) { | |
811814bd | 651 | return 0; |
b9ce1454 | 652 | } |
811814bd | 653 | } |
c6380724 | 654 | return f->buf[index]; |
811814bd JQ |
655 | } |
656 | ||
a672b469 AL |
657 | int qemu_get_byte(QEMUFile *f) |
658 | { | |
65f3bb3d | 659 | int result; |
a672b469 | 660 | |
c6380724 JQ |
661 | result = qemu_peek_byte(f, 0); |
662 | qemu_file_skip(f, 1); | |
65f3bb3d | 663 | return result; |
a672b469 AL |
664 | } |
665 | ||
3aee4be1 | 666 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
667 | { |
668 | return f->buf_offset - f->buf_size + f->buf_index; | |
669 | } | |
670 | ||
a672b469 AL |
671 | int qemu_file_rate_limit(QEMUFile *f) |
672 | { | |
9229bf3c PB |
673 | if (f->ops->rate_limit) |
674 | return f->ops->rate_limit(f->opaque); | |
a672b469 AL |
675 | |
676 | return 0; | |
677 | } | |
678 | ||
3d002df3 | 679 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 680 | { |
9229bf3c PB |
681 | if (f->ops->get_rate_limit) |
682 | return f->ops->get_rate_limit(f->opaque); | |
c163b5ca | 683 | |
684 | return 0; | |
685 | } | |
686 | ||
3d002df3 | 687 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 688 | { |
0bb05eaf GC |
689 | /* any failed or completed migration keeps its state to allow probing of |
690 | * migration data, but has no associated file anymore */ | |
9229bf3c PB |
691 | if (f && f->ops->set_rate_limit) |
692 | return f->ops->set_rate_limit(f->opaque, new_rate); | |
19629537 GC |
693 | |
694 | return 0; | |
695 | } | |
696 | ||
a672b469 AL |
697 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
698 | { | |
699 | qemu_put_byte(f, v >> 8); | |
700 | qemu_put_byte(f, v); | |
701 | } | |
702 | ||
703 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
704 | { | |
705 | qemu_put_byte(f, v >> 24); | |
706 | qemu_put_byte(f, v >> 16); | |
707 | qemu_put_byte(f, v >> 8); | |
708 | qemu_put_byte(f, v); | |
709 | } | |
710 | ||
711 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
712 | { | |
713 | qemu_put_be32(f, v >> 32); | |
714 | qemu_put_be32(f, v); | |
715 | } | |
716 | ||
717 | unsigned int qemu_get_be16(QEMUFile *f) | |
718 | { | |
719 | unsigned int v; | |
720 | v = qemu_get_byte(f) << 8; | |
721 | v |= qemu_get_byte(f); | |
722 | return v; | |
723 | } | |
724 | ||
725 | unsigned int qemu_get_be32(QEMUFile *f) | |
726 | { | |
727 | unsigned int v; | |
728 | v = qemu_get_byte(f) << 24; | |
729 | v |= qemu_get_byte(f) << 16; | |
730 | v |= qemu_get_byte(f) << 8; | |
731 | v |= qemu_get_byte(f); | |
732 | return v; | |
733 | } | |
734 | ||
735 | uint64_t qemu_get_be64(QEMUFile *f) | |
736 | { | |
737 | uint64_t v; | |
738 | v = (uint64_t)qemu_get_be32(f) << 32; | |
739 | v |= qemu_get_be32(f); | |
740 | return v; | |
741 | } | |
742 | ||
2ff68d07 PB |
743 | |
744 | /* timer */ | |
745 | ||
746 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
747 | { | |
748 | uint64_t expire_time; | |
749 | ||
750 | expire_time = qemu_timer_expire_time_ns(ts); | |
751 | qemu_put_be64(f, expire_time); | |
752 | } | |
753 | ||
754 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
755 | { | |
756 | uint64_t expire_time; | |
757 | ||
758 | expire_time = qemu_get_be64(f); | |
759 | if (expire_time != -1) { | |
760 | qemu_mod_timer_ns(ts, expire_time); | |
761 | } else { | |
762 | qemu_del_timer(ts); | |
763 | } | |
764 | } | |
765 | ||
766 | ||
cdae5cfb GH |
767 | /* bool */ |
768 | ||
769 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
770 | { | |
771 | bool *v = pv; | |
772 | *v = qemu_get_byte(f); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
777 | { | |
778 | bool *v = pv; | |
779 | qemu_put_byte(f, *v); | |
780 | } | |
781 | ||
782 | const VMStateInfo vmstate_info_bool = { | |
783 | .name = "bool", | |
784 | .get = get_bool, | |
785 | .put = put_bool, | |
786 | }; | |
787 | ||
9ed7d6ae JQ |
788 | /* 8 bit int */ |
789 | ||
790 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
791 | { | |
792 | int8_t *v = pv; | |
793 | qemu_get_s8s(f, v); | |
794 | return 0; | |
795 | } | |
796 | ||
84e2e3eb | 797 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 798 | { |
84e2e3eb | 799 | int8_t *v = pv; |
9ed7d6ae JQ |
800 | qemu_put_s8s(f, v); |
801 | } | |
802 | ||
803 | const VMStateInfo vmstate_info_int8 = { | |
804 | .name = "int8", | |
805 | .get = get_int8, | |
806 | .put = put_int8, | |
807 | }; | |
808 | ||
809 | /* 16 bit int */ | |
810 | ||
811 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
812 | { | |
813 | int16_t *v = pv; | |
814 | qemu_get_sbe16s(f, v); | |
815 | return 0; | |
816 | } | |
817 | ||
84e2e3eb | 818 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 819 | { |
84e2e3eb | 820 | int16_t *v = pv; |
9ed7d6ae JQ |
821 | qemu_put_sbe16s(f, v); |
822 | } | |
823 | ||
824 | const VMStateInfo vmstate_info_int16 = { | |
825 | .name = "int16", | |
826 | .get = get_int16, | |
827 | .put = put_int16, | |
828 | }; | |
829 | ||
830 | /* 32 bit int */ | |
831 | ||
832 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
833 | { | |
834 | int32_t *v = pv; | |
835 | qemu_get_sbe32s(f, v); | |
836 | return 0; | |
837 | } | |
838 | ||
84e2e3eb | 839 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 840 | { |
84e2e3eb | 841 | int32_t *v = pv; |
9ed7d6ae JQ |
842 | qemu_put_sbe32s(f, v); |
843 | } | |
844 | ||
845 | const VMStateInfo vmstate_info_int32 = { | |
846 | .name = "int32", | |
847 | .get = get_int32, | |
848 | .put = put_int32, | |
849 | }; | |
850 | ||
82501660 JQ |
851 | /* 32 bit int. See that the received value is the same than the one |
852 | in the field */ | |
853 | ||
854 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
855 | { | |
856 | int32_t *v = pv; | |
857 | int32_t v2; | |
858 | qemu_get_sbe32s(f, &v2); | |
859 | ||
860 | if (*v == v2) | |
861 | return 0; | |
862 | return -EINVAL; | |
863 | } | |
864 | ||
865 | const VMStateInfo vmstate_info_int32_equal = { | |
866 | .name = "int32 equal", | |
867 | .get = get_int32_equal, | |
868 | .put = put_int32, | |
869 | }; | |
870 | ||
0a031e0a JQ |
871 | /* 32 bit int. See that the received value is the less or the same |
872 | than the one in the field */ | |
873 | ||
874 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
875 | { | |
876 | int32_t *old = pv; | |
877 | int32_t new; | |
878 | qemu_get_sbe32s(f, &new); | |
879 | ||
880 | if (*old <= new) | |
881 | return 0; | |
882 | return -EINVAL; | |
883 | } | |
884 | ||
885 | const VMStateInfo vmstate_info_int32_le = { | |
886 | .name = "int32 equal", | |
887 | .get = get_int32_le, | |
888 | .put = put_int32, | |
889 | }; | |
890 | ||
9ed7d6ae JQ |
891 | /* 64 bit int */ |
892 | ||
893 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
894 | { | |
895 | int64_t *v = pv; | |
896 | qemu_get_sbe64s(f, v); | |
897 | return 0; | |
898 | } | |
899 | ||
84e2e3eb | 900 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 901 | { |
84e2e3eb | 902 | int64_t *v = pv; |
9ed7d6ae JQ |
903 | qemu_put_sbe64s(f, v); |
904 | } | |
905 | ||
906 | const VMStateInfo vmstate_info_int64 = { | |
907 | .name = "int64", | |
908 | .get = get_int64, | |
909 | .put = put_int64, | |
910 | }; | |
911 | ||
912 | /* 8 bit unsigned int */ | |
913 | ||
914 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
915 | { | |
916 | uint8_t *v = pv; | |
917 | qemu_get_8s(f, v); | |
918 | return 0; | |
919 | } | |
920 | ||
84e2e3eb | 921 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 922 | { |
84e2e3eb | 923 | uint8_t *v = pv; |
9ed7d6ae JQ |
924 | qemu_put_8s(f, v); |
925 | } | |
926 | ||
927 | const VMStateInfo vmstate_info_uint8 = { | |
928 | .name = "uint8", | |
929 | .get = get_uint8, | |
930 | .put = put_uint8, | |
931 | }; | |
932 | ||
933 | /* 16 bit unsigned int */ | |
934 | ||
935 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
936 | { | |
937 | uint16_t *v = pv; | |
938 | qemu_get_be16s(f, v); | |
939 | return 0; | |
940 | } | |
941 | ||
84e2e3eb | 942 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 943 | { |
84e2e3eb | 944 | uint16_t *v = pv; |
9ed7d6ae JQ |
945 | qemu_put_be16s(f, v); |
946 | } | |
947 | ||
948 | const VMStateInfo vmstate_info_uint16 = { | |
949 | .name = "uint16", | |
950 | .get = get_uint16, | |
951 | .put = put_uint16, | |
952 | }; | |
953 | ||
954 | /* 32 bit unsigned int */ | |
955 | ||
956 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
957 | { | |
958 | uint32_t *v = pv; | |
959 | qemu_get_be32s(f, v); | |
960 | return 0; | |
961 | } | |
962 | ||
84e2e3eb | 963 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 964 | { |
84e2e3eb | 965 | uint32_t *v = pv; |
9ed7d6ae JQ |
966 | qemu_put_be32s(f, v); |
967 | } | |
968 | ||
969 | const VMStateInfo vmstate_info_uint32 = { | |
970 | .name = "uint32", | |
971 | .get = get_uint32, | |
972 | .put = put_uint32, | |
973 | }; | |
974 | ||
9122a8fe JQ |
975 | /* 32 bit uint. See that the received value is the same than the one |
976 | in the field */ | |
977 | ||
978 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
979 | { | |
980 | uint32_t *v = pv; | |
981 | uint32_t v2; | |
982 | qemu_get_be32s(f, &v2); | |
983 | ||
984 | if (*v == v2) { | |
985 | return 0; | |
986 | } | |
987 | return -EINVAL; | |
988 | } | |
989 | ||
990 | const VMStateInfo vmstate_info_uint32_equal = { | |
991 | .name = "uint32 equal", | |
992 | .get = get_uint32_equal, | |
993 | .put = put_uint32, | |
994 | }; | |
995 | ||
9ed7d6ae JQ |
996 | /* 64 bit unsigned int */ |
997 | ||
998 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
999 | { | |
1000 | uint64_t *v = pv; | |
1001 | qemu_get_be64s(f, v); | |
1002 | return 0; | |
1003 | } | |
1004 | ||
84e2e3eb | 1005 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1006 | { |
84e2e3eb | 1007 | uint64_t *v = pv; |
9ed7d6ae JQ |
1008 | qemu_put_be64s(f, v); |
1009 | } | |
1010 | ||
1011 | const VMStateInfo vmstate_info_uint64 = { | |
1012 | .name = "uint64", | |
1013 | .get = get_uint64, | |
1014 | .put = put_uint64, | |
1015 | }; | |
1016 | ||
80cd83e7 JQ |
1017 | /* 8 bit int. See that the received value is the same than the one |
1018 | in the field */ | |
1019 | ||
1020 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1021 | { | |
1022 | uint8_t *v = pv; | |
1023 | uint8_t v2; | |
1024 | qemu_get_8s(f, &v2); | |
1025 | ||
1026 | if (*v == v2) | |
1027 | return 0; | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
1031 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1032 | .name = "uint8 equal", |
80cd83e7 JQ |
1033 | .get = get_uint8_equal, |
1034 | .put = put_uint8, | |
1035 | }; | |
1036 | ||
dc3b83a0 JQ |
1037 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1038 | in the field */ | |
1039 | ||
1040 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1041 | { | |
1042 | uint16_t *v = pv; | |
1043 | uint16_t v2; | |
1044 | qemu_get_be16s(f, &v2); | |
1045 | ||
1046 | if (*v == v2) | |
1047 | return 0; | |
1048 | return -EINVAL; | |
1049 | } | |
1050 | ||
1051 | const VMStateInfo vmstate_info_uint16_equal = { | |
1052 | .name = "uint16 equal", | |
1053 | .get = get_uint16_equal, | |
1054 | .put = put_uint16, | |
1055 | }; | |
1056 | ||
dde0463b JQ |
1057 | /* timers */ |
1058 | ||
1059 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1060 | { | |
1061 | QEMUTimer *v = pv; | |
1062 | qemu_get_timer(f, v); | |
1063 | return 0; | |
1064 | } | |
1065 | ||
84e2e3eb | 1066 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1067 | { |
84e2e3eb | 1068 | QEMUTimer *v = pv; |
dde0463b JQ |
1069 | qemu_put_timer(f, v); |
1070 | } | |
1071 | ||
1072 | const VMStateInfo vmstate_info_timer = { | |
1073 | .name = "timer", | |
1074 | .get = get_timer, | |
1075 | .put = put_timer, | |
1076 | }; | |
1077 | ||
6f67c50f JQ |
1078 | /* uint8_t buffers */ |
1079 | ||
1080 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1081 | { | |
1082 | uint8_t *v = pv; | |
1083 | qemu_get_buffer(f, v, size); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
84e2e3eb | 1087 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1088 | { |
84e2e3eb | 1089 | uint8_t *v = pv; |
6f67c50f JQ |
1090 | qemu_put_buffer(f, v, size); |
1091 | } | |
1092 | ||
1093 | const VMStateInfo vmstate_info_buffer = { | |
1094 | .name = "buffer", | |
1095 | .get = get_buffer, | |
1096 | .put = put_buffer, | |
1097 | }; | |
1098 | ||
76507c75 | 1099 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1100 | not useful anymore */ |
76507c75 JQ |
1101 | |
1102 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1103 | { | |
21174c34 JK |
1104 | uint8_t buf[1024]; |
1105 | int block_len; | |
1106 | ||
1107 | while (size > 0) { | |
1108 | block_len = MIN(sizeof(buf), size); | |
1109 | size -= block_len; | |
1110 | qemu_get_buffer(f, buf, block_len); | |
1111 | } | |
1112 | return 0; | |
76507c75 JQ |
1113 | } |
1114 | ||
1115 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1116 | { | |
21174c34 JK |
1117 | static const uint8_t buf[1024]; |
1118 | int block_len; | |
1119 | ||
1120 | while (size > 0) { | |
1121 | block_len = MIN(sizeof(buf), size); | |
1122 | size -= block_len; | |
1123 | qemu_put_buffer(f, buf, block_len); | |
1124 | } | |
76507c75 JQ |
1125 | } |
1126 | ||
1127 | const VMStateInfo vmstate_info_unused_buffer = { | |
1128 | .name = "unused_buffer", | |
1129 | .get = get_unused_buffer, | |
1130 | .put = put_unused_buffer, | |
1131 | }; | |
1132 | ||
08e99e29 PM |
1133 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1134 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1135 | * bit words with the bits in big endian order. The in-memory format | |
1136 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1137 | */ | |
1138 | /* This is the number of 64 bit words sent over the wire */ | |
1139 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1140 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1141 | { | |
1142 | unsigned long *bmp = pv; | |
1143 | int i, idx = 0; | |
1144 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1145 | uint64_t w = qemu_get_be64(f); | |
1146 | bmp[idx++] = w; | |
1147 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1148 | bmp[idx++] = w >> 32; | |
1149 | } | |
1150 | } | |
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1155 | { | |
1156 | unsigned long *bmp = pv; | |
1157 | int i, idx = 0; | |
1158 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1159 | uint64_t w = bmp[idx++]; | |
1160 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1161 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1162 | } | |
1163 | qemu_put_be64(f, w); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | const VMStateInfo vmstate_info_bitmap = { | |
1168 | .name = "bitmap", | |
1169 | .get = get_bitmap, | |
1170 | .put = put_bitmap, | |
1171 | }; | |
1172 | ||
7685ee6a AW |
1173 | typedef struct CompatEntry { |
1174 | char idstr[256]; | |
1175 | int instance_id; | |
1176 | } CompatEntry; | |
1177 | ||
a672b469 | 1178 | typedef struct SaveStateEntry { |
72cf2d4f | 1179 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1180 | char idstr[256]; |
1181 | int instance_id; | |
4d2ffa08 | 1182 | int alias_id; |
a672b469 AL |
1183 | int version_id; |
1184 | int section_id; | |
22ea40f4 | 1185 | SaveVMHandlers *ops; |
9ed7d6ae | 1186 | const VMStateDescription *vmsd; |
a672b469 | 1187 | void *opaque; |
7685ee6a | 1188 | CompatEntry *compat; |
24312968 | 1189 | int no_migrate; |
a7ae8355 | 1190 | int is_ram; |
a672b469 AL |
1191 | } SaveStateEntry; |
1192 | ||
c163b5ca | 1193 | |
72cf2d4f BS |
1194 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1195 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1196 | static int global_section_id; |
a672b469 | 1197 | |
8718e999 JQ |
1198 | static int calculate_new_instance_id(const char *idstr) |
1199 | { | |
1200 | SaveStateEntry *se; | |
1201 | int instance_id = 0; | |
1202 | ||
72cf2d4f | 1203 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1204 | if (strcmp(idstr, se->idstr) == 0 |
1205 | && instance_id <= se->instance_id) { | |
1206 | instance_id = se->instance_id + 1; | |
1207 | } | |
1208 | } | |
1209 | return instance_id; | |
1210 | } | |
1211 | ||
7685ee6a AW |
1212 | static int calculate_compat_instance_id(const char *idstr) |
1213 | { | |
1214 | SaveStateEntry *se; | |
1215 | int instance_id = 0; | |
1216 | ||
1217 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1218 | if (!se->compat) | |
1219 | continue; | |
1220 | ||
1221 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1222 | && instance_id <= se->compat->instance_id) { | |
1223 | instance_id = se->compat->instance_id + 1; | |
1224 | } | |
1225 | } | |
1226 | return instance_id; | |
1227 | } | |
1228 | ||
a672b469 AL |
1229 | /* TODO: Individual devices generally have very little idea about the rest |
1230 | of the system, so instance_id should be removed/replaced. | |
1231 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1232 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1233 | int register_savevm_live(DeviceState *dev, |
1234 | const char *idstr, | |
a672b469 AL |
1235 | int instance_id, |
1236 | int version_id, | |
7908c78d | 1237 | SaveVMHandlers *ops, |
a672b469 AL |
1238 | void *opaque) |
1239 | { | |
8718e999 | 1240 | SaveStateEntry *se; |
a672b469 | 1241 | |
7267c094 | 1242 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1243 | se->version_id = version_id; |
1244 | se->section_id = global_section_id++; | |
7908c78d | 1245 | se->ops = ops; |
a672b469 | 1246 | se->opaque = opaque; |
9ed7d6ae | 1247 | se->vmsd = NULL; |
24312968 | 1248 | se->no_migrate = 0; |
a7ae8355 | 1249 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1250 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1251 | se->is_ram = 1; |
1252 | } | |
a672b469 | 1253 | |
09e5ab63 AL |
1254 | if (dev) { |
1255 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1256 | if (id) { |
1257 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1258 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1259 | g_free(id); |
7685ee6a | 1260 | |
7267c094 | 1261 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1262 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1263 | se->compat->instance_id = instance_id == -1 ? | |
1264 | calculate_compat_instance_id(idstr) : instance_id; | |
1265 | instance_id = -1; | |
1266 | } | |
1267 | } | |
1268 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1269 | ||
8718e999 | 1270 | if (instance_id == -1) { |
7685ee6a | 1271 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1272 | } else { |
1273 | se->instance_id = instance_id; | |
a672b469 | 1274 | } |
7685ee6a | 1275 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1276 | /* add at the end of list */ |
72cf2d4f | 1277 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1278 | return 0; |
1279 | } | |
1280 | ||
0be71e32 AW |
1281 | int register_savevm(DeviceState *dev, |
1282 | const char *idstr, | |
a672b469 AL |
1283 | int instance_id, |
1284 | int version_id, | |
1285 | SaveStateHandler *save_state, | |
1286 | LoadStateHandler *load_state, | |
1287 | void *opaque) | |
1288 | { | |
7908c78d JQ |
1289 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1290 | ops->save_state = save_state; | |
1291 | ops->load_state = load_state; | |
0be71e32 | 1292 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1293 | ops, opaque); |
a672b469 AL |
1294 | } |
1295 | ||
0be71e32 | 1296 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1297 | { |
8718e999 | 1298 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1299 | char id[256] = ""; |
1300 | ||
09e5ab63 AL |
1301 | if (dev) { |
1302 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1303 | if (path) { |
1304 | pstrcpy(id, sizeof(id), path); | |
1305 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1306 | g_free(path); |
7685ee6a AW |
1307 | } |
1308 | } | |
1309 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1310 | |
72cf2d4f | 1311 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1312 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1313 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1314 | if (se->compat) { |
7267c094 | 1315 | g_free(se->compat); |
69e58af9 | 1316 | } |
22ea40f4 | 1317 | g_free(se->ops); |
7267c094 | 1318 | g_free(se); |
41bd13af | 1319 | } |
41bd13af AL |
1320 | } |
1321 | } | |
1322 | ||
0be71e32 | 1323 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1324 | const VMStateDescription *vmsd, |
1325 | void *opaque, int alias_id, | |
1326 | int required_for_version) | |
9ed7d6ae | 1327 | { |
8718e999 | 1328 | SaveStateEntry *se; |
9ed7d6ae | 1329 | |
4d2ffa08 JK |
1330 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1331 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1332 | ||
7267c094 | 1333 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1334 | se->version_id = vmsd->version_id; |
1335 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1336 | se->opaque = opaque; |
1337 | se->vmsd = vmsd; | |
4d2ffa08 | 1338 | se->alias_id = alias_id; |
2837c8ea | 1339 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1340 | |
09e5ab63 AL |
1341 | if (dev) { |
1342 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1343 | if (id) { |
1344 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1345 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1346 | g_free(id); |
7685ee6a | 1347 | |
7267c094 | 1348 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1349 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1350 | se->compat->instance_id = instance_id == -1 ? | |
1351 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1352 | instance_id = -1; | |
1353 | } | |
1354 | } | |
1355 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1356 | ||
8718e999 | 1357 | if (instance_id == -1) { |
7685ee6a | 1358 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1359 | } else { |
1360 | se->instance_id = instance_id; | |
9ed7d6ae | 1361 | } |
7685ee6a | 1362 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1363 | /* add at the end of list */ |
72cf2d4f | 1364 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1365 | return 0; |
1366 | } | |
1367 | ||
0be71e32 AW |
1368 | int vmstate_register(DeviceState *dev, int instance_id, |
1369 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1370 | { |
0be71e32 AW |
1371 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1372 | opaque, -1, 0); | |
4d2ffa08 JK |
1373 | } |
1374 | ||
0be71e32 AW |
1375 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1376 | void *opaque) | |
9ed7d6ae | 1377 | { |
1eb7538b JQ |
1378 | SaveStateEntry *se, *new_se; |
1379 | ||
72cf2d4f | 1380 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1381 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1382 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1383 | if (se->compat) { |
7267c094 | 1384 | g_free(se->compat); |
69e58af9 | 1385 | } |
7267c094 | 1386 | g_free(se); |
1eb7538b JQ |
1387 | } |
1388 | } | |
9ed7d6ae JQ |
1389 | } |
1390 | ||
811814bd JQ |
1391 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1392 | void *opaque); | |
1393 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1394 | void *opaque); | |
1395 | ||
9ed7d6ae JQ |
1396 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1397 | void *opaque, int version_id) | |
1398 | { | |
1399 | VMStateField *field = vmsd->fields; | |
811814bd | 1400 | int ret; |
9ed7d6ae JQ |
1401 | |
1402 | if (version_id > vmsd->version_id) { | |
1403 | return -EINVAL; | |
1404 | } | |
1405 | if (version_id < vmsd->minimum_version_id_old) { | |
1406 | return -EINVAL; | |
1407 | } | |
1408 | if (version_id < vmsd->minimum_version_id) { | |
1409 | return vmsd->load_state_old(f, opaque, version_id); | |
1410 | } | |
fd4d52de JQ |
1411 | if (vmsd->pre_load) { |
1412 | int ret = vmsd->pre_load(opaque); | |
1413 | if (ret) | |
1414 | return ret; | |
1415 | } | |
9ed7d6ae | 1416 | while(field->name) { |
f11f6a5f JQ |
1417 | if ((field->field_exists && |
1418 | field->field_exists(opaque, version_id)) || | |
1419 | (!field->field_exists && | |
1420 | field->version_id <= version_id)) { | |
f752a6aa | 1421 | void *base_addr = opaque + field->offset; |
811814bd | 1422 | int i, n_elems = 1; |
e61a1e0a | 1423 | int size = field->size; |
9ed7d6ae | 1424 | |
e61a1e0a JQ |
1425 | if (field->flags & VMS_VBUFFER) { |
1426 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1427 | if (field->flags & VMS_MULTIPLY) { |
1428 | size *= field->size; | |
1429 | } | |
e61a1e0a | 1430 | } |
f752a6aa JQ |
1431 | if (field->flags & VMS_ARRAY) { |
1432 | n_elems = field->num; | |
d6698281 JQ |
1433 | } else if (field->flags & VMS_VARRAY_INT32) { |
1434 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1435 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1436 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1437 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1438 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1439 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1440 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1441 | } |
dde0463b | 1442 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1443 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1444 | } |
f752a6aa | 1445 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1446 | void *addr = base_addr + size * i; |
ec245e21 | 1447 | |
19df438b JQ |
1448 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1449 | addr = *(void **)addr; | |
1450 | } | |
ec245e21 | 1451 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1452 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1453 | } else { |
e61a1e0a | 1454 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1455 | |
1456 | } | |
f752a6aa JQ |
1457 | if (ret < 0) { |
1458 | return ret; | |
1459 | } | |
9ed7d6ae JQ |
1460 | } |
1461 | } | |
1462 | field++; | |
1463 | } | |
811814bd JQ |
1464 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1465 | if (ret != 0) { | |
1466 | return ret; | |
1467 | } | |
752ff2fa | 1468 | if (vmsd->post_load) { |
e59fb374 | 1469 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1470 | } |
9ed7d6ae JQ |
1471 | return 0; |
1472 | } | |
1473 | ||
1474 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1475 | void *opaque) |
9ed7d6ae JQ |
1476 | { |
1477 | VMStateField *field = vmsd->fields; | |
1478 | ||
8fb0791d JQ |
1479 | if (vmsd->pre_save) { |
1480 | vmsd->pre_save(opaque); | |
1481 | } | |
9ed7d6ae | 1482 | while(field->name) { |
f11f6a5f JQ |
1483 | if (!field->field_exists || |
1484 | field->field_exists(opaque, vmsd->version_id)) { | |
1485 | void *base_addr = opaque + field->offset; | |
1486 | int i, n_elems = 1; | |
e61a1e0a | 1487 | int size = field->size; |
dde0463b | 1488 | |
e61a1e0a JQ |
1489 | if (field->flags & VMS_VBUFFER) { |
1490 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1491 | if (field->flags & VMS_MULTIPLY) { |
1492 | size *= field->size; | |
1493 | } | |
e61a1e0a | 1494 | } |
f11f6a5f JQ |
1495 | if (field->flags & VMS_ARRAY) { |
1496 | n_elems = field->num; | |
d6698281 JQ |
1497 | } else if (field->flags & VMS_VARRAY_INT32) { |
1498 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1499 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1500 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1501 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1502 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1503 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1504 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1505 | } |
1506 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1507 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1508 | } |
1509 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1510 | void *addr = base_addr + size * i; |
ec245e21 | 1511 | |
8595387e JQ |
1512 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1513 | addr = *(void **)addr; | |
1514 | } | |
f11f6a5f JQ |
1515 | if (field->flags & VMS_STRUCT) { |
1516 | vmstate_save_state(f, field->vmsd, addr); | |
1517 | } else { | |
e61a1e0a | 1518 | field->info->put(f, addr, size); |
f11f6a5f | 1519 | } |
ec245e21 | 1520 | } |
dde0463b | 1521 | } |
9ed7d6ae JQ |
1522 | field++; |
1523 | } | |
811814bd | 1524 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1525 | } |
1526 | ||
4082be4d JQ |
1527 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1528 | { | |
9ed7d6ae | 1529 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1530 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1531 | } |
1532 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1533 | } |
1534 | ||
dc912121 | 1535 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1536 | { |
9ed7d6ae | 1537 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1538 | se->ops->save_state(f, se->opaque); |
dc912121 | 1539 | return; |
9ed7d6ae JQ |
1540 | } |
1541 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1542 | } |
1543 | ||
a672b469 AL |
1544 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1545 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1546 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1547 | ||
1548 | #define QEMU_VM_EOF 0x00 | |
1549 | #define QEMU_VM_SECTION_START 0x01 | |
1550 | #define QEMU_VM_SECTION_PART 0x02 | |
1551 | #define QEMU_VM_SECTION_END 0x03 | |
1552 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1553 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1554 | |
e1c37d0e | 1555 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1556 | { |
1557 | SaveStateEntry *se; | |
1558 | ||
1559 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1560 | if (se->no_migrate) { | |
e1c37d0e | 1561 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1562 | return true; |
1563 | } | |
1564 | } | |
1565 | return false; | |
1566 | } | |
1567 | ||
6607ae23 IY |
1568 | int qemu_savevm_state_begin(QEMUFile *f, |
1569 | const MigrationParams *params) | |
a672b469 AL |
1570 | { |
1571 | SaveStateEntry *se; | |
39346385 | 1572 | int ret; |
a672b469 | 1573 | |
c163b5ca | 1574 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1575 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1576 | continue; |
6607ae23 | 1577 | } |
22ea40f4 | 1578 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1579 | } |
1580 | ||
a672b469 AL |
1581 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1582 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1583 | ||
72cf2d4f | 1584 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1585 | int len; |
1586 | ||
d1315aac | 1587 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1588 | continue; |
22ea40f4 | 1589 | } |
6bd68781 JQ |
1590 | if (se->ops && se->ops->is_active) { |
1591 | if (!se->ops->is_active(se->opaque)) { | |
1592 | continue; | |
1593 | } | |
1594 | } | |
a672b469 AL |
1595 | /* Section type */ |
1596 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1597 | qemu_put_be32(f, se->section_id); | |
1598 | ||
1599 | /* ID string */ | |
1600 | len = strlen(se->idstr); | |
1601 | qemu_put_byte(f, len); | |
1602 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1603 | ||
1604 | qemu_put_be32(f, se->instance_id); | |
1605 | qemu_put_be32(f, se->version_id); | |
1606 | ||
d1315aac | 1607 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1608 | if (ret < 0) { |
539de124 | 1609 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1610 | return ret; |
1611 | } | |
a672b469 | 1612 | } |
624b9cc2 | 1613 | ret = qemu_file_get_error(f); |
39346385 | 1614 | if (ret != 0) { |
539de124 | 1615 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1616 | } |
a672b469 | 1617 | |
39346385 JQ |
1618 | return ret; |
1619 | ||
a672b469 AL |
1620 | } |
1621 | ||
39346385 | 1622 | /* |
07f35073 | 1623 | * this function has three return values: |
39346385 JQ |
1624 | * negative: there was one error, and we have -errno. |
1625 | * 0 : We haven't finished, caller have to go again | |
1626 | * 1 : We have finished, we can go to complete phase | |
1627 | */ | |
539de124 | 1628 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1629 | { |
1630 | SaveStateEntry *se; | |
1631 | int ret = 1; | |
1632 | ||
72cf2d4f | 1633 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1634 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1635 | continue; |
22ea40f4 | 1636 | } |
6bd68781 JQ |
1637 | if (se->ops && se->ops->is_active) { |
1638 | if (!se->ops->is_active(se->opaque)) { | |
1639 | continue; | |
1640 | } | |
1641 | } | |
aac844ed JQ |
1642 | if (qemu_file_rate_limit(f)) { |
1643 | return 0; | |
1644 | } | |
517a13c9 | 1645 | trace_savevm_section_start(); |
a672b469 AL |
1646 | /* Section type */ |
1647 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1648 | qemu_put_be32(f, se->section_id); | |
1649 | ||
16310a3c | 1650 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1651 | trace_savevm_section_end(se->section_id); |
1652 | ||
2975725f | 1653 | if (ret <= 0) { |
90697be8 JK |
1654 | /* Do not proceed to the next vmstate before this one reported |
1655 | completion of the current stage. This serializes the migration | |
1656 | and reduces the probability that a faster changing state is | |
1657 | synchronized over and over again. */ | |
1658 | break; | |
1659 | } | |
a672b469 | 1660 | } |
39346385 JQ |
1661 | if (ret != 0) { |
1662 | return ret; | |
1663 | } | |
624b9cc2 | 1664 | ret = qemu_file_get_error(f); |
39346385 | 1665 | if (ret != 0) { |
539de124 | 1666 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1667 | } |
39346385 | 1668 | return ret; |
a672b469 AL |
1669 | } |
1670 | ||
539de124 | 1671 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1672 | { |
1673 | SaveStateEntry *se; | |
2975725f | 1674 | int ret; |
a672b469 | 1675 | |
ea375f9a JK |
1676 | cpu_synchronize_all_states(); |
1677 | ||
72cf2d4f | 1678 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1679 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1680 | continue; |
22ea40f4 | 1681 | } |
6bd68781 JQ |
1682 | if (se->ops && se->ops->is_active) { |
1683 | if (!se->ops->is_active(se->opaque)) { | |
1684 | continue; | |
1685 | } | |
1686 | } | |
517a13c9 | 1687 | trace_savevm_section_start(); |
a672b469 AL |
1688 | /* Section type */ |
1689 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1690 | qemu_put_be32(f, se->section_id); | |
1691 | ||
16310a3c | 1692 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1693 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1694 | if (ret < 0) { |
1695 | return ret; | |
1696 | } | |
a672b469 AL |
1697 | } |
1698 | ||
72cf2d4f | 1699 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1700 | int len; |
1701 | ||
22ea40f4 | 1702 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1703 | continue; |
22ea40f4 | 1704 | } |
517a13c9 | 1705 | trace_savevm_section_start(); |
a672b469 AL |
1706 | /* Section type */ |
1707 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1708 | qemu_put_be32(f, se->section_id); | |
1709 | ||
1710 | /* ID string */ | |
1711 | len = strlen(se->idstr); | |
1712 | qemu_put_byte(f, len); | |
1713 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1714 | ||
1715 | qemu_put_be32(f, se->instance_id); | |
1716 | qemu_put_be32(f, se->version_id); | |
1717 | ||
dc912121 | 1718 | vmstate_save(f, se); |
517a13c9 | 1719 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1720 | } |
1721 | ||
1722 | qemu_put_byte(f, QEMU_VM_EOF); | |
1723 | ||
624b9cc2 | 1724 | return qemu_file_get_error(f); |
a672b469 AL |
1725 | } |
1726 | ||
539de124 | 1727 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1728 | { |
1729 | SaveStateEntry *se; | |
1730 | ||
1731 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1732 | if (se->ops && se->ops->cancel) { |
1733 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1734 | } |
1735 | } | |
1736 | } | |
1737 | ||
e1c37d0e | 1738 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1739 | { |
a672b469 | 1740 | int ret; |
6607ae23 IY |
1741 | MigrationParams params = { |
1742 | .blk = 0, | |
1743 | .shared = 0 | |
1744 | }; | |
a672b469 | 1745 | |
e1c37d0e | 1746 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1747 | ret = -EINVAL; |
1748 | goto out; | |
1749 | } | |
1750 | ||
6607ae23 | 1751 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1752 | if (ret < 0) |
1753 | goto out; | |
1754 | ||
1755 | do { | |
539de124 | 1756 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1757 | if (ret < 0) |
1758 | goto out; | |
1759 | } while (ret == 0); | |
1760 | ||
539de124 | 1761 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1762 | |
1763 | out: | |
39346385 | 1764 | if (ret == 0) { |
624b9cc2 | 1765 | ret = qemu_file_get_error(f); |
39346385 | 1766 | } |
a672b469 | 1767 | |
a672b469 AL |
1768 | return ret; |
1769 | } | |
1770 | ||
a7ae8355 SS |
1771 | static int qemu_save_device_state(QEMUFile *f) |
1772 | { | |
1773 | SaveStateEntry *se; | |
1774 | ||
1775 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1776 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1777 | ||
1778 | cpu_synchronize_all_states(); | |
1779 | ||
1780 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1781 | int len; | |
1782 | ||
1783 | if (se->is_ram) { | |
1784 | continue; | |
1785 | } | |
22ea40f4 | 1786 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1787 | continue; |
1788 | } | |
1789 | ||
1790 | /* Section type */ | |
1791 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1792 | qemu_put_be32(f, se->section_id); | |
1793 | ||
1794 | /* ID string */ | |
1795 | len = strlen(se->idstr); | |
1796 | qemu_put_byte(f, len); | |
1797 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1798 | ||
1799 | qemu_put_be32(f, se->instance_id); | |
1800 | qemu_put_be32(f, se->version_id); | |
1801 | ||
1802 | vmstate_save(f, se); | |
1803 | } | |
1804 | ||
1805 | qemu_put_byte(f, QEMU_VM_EOF); | |
1806 | ||
1807 | return qemu_file_get_error(f); | |
1808 | } | |
1809 | ||
a672b469 AL |
1810 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1811 | { | |
1812 | SaveStateEntry *se; | |
1813 | ||
72cf2d4f | 1814 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1815 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1816 | (instance_id == se->instance_id || |
1817 | instance_id == se->alias_id)) | |
a672b469 | 1818 | return se; |
7685ee6a AW |
1819 | /* Migrating from an older version? */ |
1820 | if (strstr(se->idstr, idstr) && se->compat) { | |
1821 | if (!strcmp(se->compat->idstr, idstr) && | |
1822 | (instance_id == se->compat->instance_id || | |
1823 | instance_id == se->alias_id)) | |
1824 | return se; | |
1825 | } | |
a672b469 AL |
1826 | } |
1827 | return NULL; | |
1828 | } | |
1829 | ||
811814bd JQ |
1830 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1831 | { | |
1832 | while(sub && sub->needed) { | |
1833 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1834 | return sub->vmsd; | |
1835 | } | |
1836 | sub++; | |
1837 | } | |
1838 | return NULL; | |
1839 | } | |
1840 | ||
1841 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1842 | void *opaque) | |
1843 | { | |
c6380724 | 1844 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1845 | char idstr[256]; |
1846 | int ret; | |
c6380724 | 1847 | uint8_t version_id, len, size; |
811814bd JQ |
1848 | const VMStateDescription *sub_vmsd; |
1849 | ||
c6380724 JQ |
1850 | len = qemu_peek_byte(f, 1); |
1851 | if (len < strlen(vmsd->name) + 1) { | |
1852 | /* subsection name has be be "section_name/a" */ | |
1853 | return 0; | |
1854 | } | |
1855 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1856 | if (size != len) { | |
1857 | return 0; | |
1858 | } | |
1859 | idstr[size] = 0; | |
811814bd | 1860 | |
c6380724 JQ |
1861 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1862 | /* it don't have a valid subsection name */ | |
1863 | return 0; | |
1864 | } | |
3da9eebd | 1865 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1866 | if (sub_vmsd == NULL) { |
1867 | return -ENOENT; | |
1868 | } | |
c6380724 JQ |
1869 | qemu_file_skip(f, 1); /* subsection */ |
1870 | qemu_file_skip(f, 1); /* len */ | |
1871 | qemu_file_skip(f, len); /* idstr */ | |
1872 | version_id = qemu_get_be32(f); | |
1873 | ||
811814bd JQ |
1874 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1875 | if (ret) { | |
1876 | return ret; | |
1877 | } | |
1878 | } | |
1879 | return 0; | |
1880 | } | |
1881 | ||
1882 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1883 | void *opaque) | |
1884 | { | |
1885 | const VMStateSubsection *sub = vmsd->subsections; | |
1886 | ||
1887 | while (sub && sub->needed) { | |
1888 | if (sub->needed(opaque)) { | |
1889 | const VMStateDescription *vmsd = sub->vmsd; | |
1890 | uint8_t len; | |
1891 | ||
1892 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1893 | len = strlen(vmsd->name); | |
1894 | qemu_put_byte(f, len); | |
1895 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1896 | qemu_put_be32(f, vmsd->version_id); | |
1897 | vmstate_save_state(f, vmsd, opaque); | |
1898 | } | |
1899 | sub++; | |
1900 | } | |
1901 | } | |
1902 | ||
a672b469 | 1903 | typedef struct LoadStateEntry { |
72cf2d4f | 1904 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1905 | SaveStateEntry *se; |
1906 | int section_id; | |
1907 | int version_id; | |
a672b469 AL |
1908 | } LoadStateEntry; |
1909 | ||
a672b469 AL |
1910 | int qemu_loadvm_state(QEMUFile *f) |
1911 | { | |
72cf2d4f BS |
1912 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1913 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1914 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1915 | uint8_t section_type; |
1916 | unsigned int v; | |
1917 | int ret; | |
1918 | ||
e1c37d0e | 1919 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1920 | return -EINVAL; |
1921 | } | |
1922 | ||
a672b469 AL |
1923 | v = qemu_get_be32(f); |
1924 | if (v != QEMU_VM_FILE_MAGIC) | |
1925 | return -EINVAL; | |
1926 | ||
1927 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1928 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1929 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1930 | return -ENOTSUP; | |
1931 | } | |
a672b469 AL |
1932 | if (v != QEMU_VM_FILE_VERSION) |
1933 | return -ENOTSUP; | |
1934 | ||
1935 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1936 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1937 | SaveStateEntry *se; |
1938 | char idstr[257]; | |
1939 | int len; | |
1940 | ||
1941 | switch (section_type) { | |
1942 | case QEMU_VM_SECTION_START: | |
1943 | case QEMU_VM_SECTION_FULL: | |
1944 | /* Read section start */ | |
1945 | section_id = qemu_get_be32(f); | |
1946 | len = qemu_get_byte(f); | |
1947 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1948 | idstr[len] = 0; | |
1949 | instance_id = qemu_get_be32(f); | |
1950 | version_id = qemu_get_be32(f); | |
1951 | ||
1952 | /* Find savevm section */ | |
1953 | se = find_se(idstr, instance_id); | |
1954 | if (se == NULL) { | |
1955 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1956 | ret = -EINVAL; | |
1957 | goto out; | |
1958 | } | |
1959 | ||
1960 | /* Validate version */ | |
1961 | if (version_id > se->version_id) { | |
1962 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1963 | version_id, idstr, se->version_id); | |
1964 | ret = -EINVAL; | |
1965 | goto out; | |
1966 | } | |
1967 | ||
1968 | /* Add entry */ | |
7267c094 | 1969 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1970 | |
1971 | le->se = se; | |
1972 | le->section_id = section_id; | |
1973 | le->version_id = version_id; | |
72cf2d4f | 1974 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1975 | |
4082be4d | 1976 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1977 | if (ret < 0) { |
1978 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1979 | instance_id, idstr); | |
1980 | goto out; | |
1981 | } | |
a672b469 AL |
1982 | break; |
1983 | case QEMU_VM_SECTION_PART: | |
1984 | case QEMU_VM_SECTION_END: | |
1985 | section_id = qemu_get_be32(f); | |
1986 | ||
72cf2d4f | 1987 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1988 | if (le->section_id == section_id) { |
1989 | break; | |
1990 | } | |
1991 | } | |
a672b469 AL |
1992 | if (le == NULL) { |
1993 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1994 | ret = -EINVAL; | |
1995 | goto out; | |
1996 | } | |
1997 | ||
4082be4d | 1998 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1999 | if (ret < 0) { |
2000 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2001 | section_id); | |
2002 | goto out; | |
2003 | } | |
a672b469 AL |
2004 | break; |
2005 | default: | |
2006 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2007 | ret = -EINVAL; | |
2008 | goto out; | |
2009 | } | |
2010 | } | |
2011 | ||
ea375f9a JK |
2012 | cpu_synchronize_all_post_init(); |
2013 | ||
a672b469 AL |
2014 | ret = 0; |
2015 | ||
2016 | out: | |
72cf2d4f BS |
2017 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2018 | QLIST_REMOVE(le, entry); | |
7267c094 | 2019 | g_free(le); |
a672b469 AL |
2020 | } |
2021 | ||
42802d47 JQ |
2022 | if (ret == 0) { |
2023 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2024 | } |
a672b469 AL |
2025 | |
2026 | return ret; | |
2027 | } | |
2028 | ||
a672b469 AL |
2029 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2030 | const char *name) | |
2031 | { | |
2032 | QEMUSnapshotInfo *sn_tab, *sn; | |
2033 | int nb_sns, i, ret; | |
2034 | ||
2035 | ret = -ENOENT; | |
2036 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2037 | if (nb_sns < 0) | |
2038 | return ret; | |
2039 | for(i = 0; i < nb_sns; i++) { | |
2040 | sn = &sn_tab[i]; | |
2041 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2042 | *sn_info = *sn; | |
2043 | ret = 0; | |
2044 | break; | |
2045 | } | |
2046 | } | |
7267c094 | 2047 | g_free(sn_tab); |
a672b469 AL |
2048 | return ret; |
2049 | } | |
2050 | ||
cb499fb2 KW |
2051 | /* |
2052 | * Deletes snapshots of a given name in all opened images. | |
2053 | */ | |
2054 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2055 | { | |
2056 | BlockDriverState *bs; | |
cb499fb2 KW |
2057 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2058 | int ret; | |
2059 | ||
dbc13590 MA |
2060 | bs = NULL; |
2061 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2062 | if (bdrv_can_snapshot(bs) && |
2063 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2064 | { | |
2065 | ret = bdrv_snapshot_delete(bs, name); | |
2066 | if (ret < 0) { | |
2067 | monitor_printf(mon, | |
2068 | "Error while deleting snapshot on '%s'\n", | |
2069 | bdrv_get_device_name(bs)); | |
2070 | return -1; | |
2071 | } | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | return 0; | |
2076 | } | |
2077 | ||
d54908a5 | 2078 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2079 | { |
2080 | BlockDriverState *bs, *bs1; | |
2081 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2082 | int ret; |
a672b469 AL |
2083 | QEMUFile *f; |
2084 | int saved_vm_running; | |
c2c9a466 | 2085 | uint64_t vm_state_size; |
a672b469 AL |
2086 | #ifdef _WIN32 |
2087 | struct _timeb tb; | |
7d631a11 | 2088 | struct tm *ptm; |
a672b469 AL |
2089 | #else |
2090 | struct timeval tv; | |
7d631a11 | 2091 | struct tm tm; |
a672b469 | 2092 | #endif |
d54908a5 | 2093 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2094 | |
feeee5ac | 2095 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2096 | bs = NULL; |
2097 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2098 | |
07b70bfb | 2099 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2100 | continue; |
2101 | } | |
2102 | ||
2103 | if (!bdrv_can_snapshot(bs)) { | |
2104 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2105 | bdrv_get_device_name(bs)); | |
2106 | return; | |
2107 | } | |
2108 | } | |
2109 | ||
f9092b10 | 2110 | bs = bdrv_snapshots(); |
a672b469 | 2111 | if (!bs) { |
376253ec | 2112 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2113 | return; |
2114 | } | |
a672b469 | 2115 | |
1354869c | 2116 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2117 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2118 | |
cb499fb2 | 2119 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2120 | |
2121 | /* fill auxiliary fields */ | |
2122 | #ifdef _WIN32 | |
2123 | _ftime(&tb); | |
2124 | sn->date_sec = tb.time; | |
2125 | sn->date_nsec = tb.millitm * 1000000; | |
2126 | #else | |
2127 | gettimeofday(&tv, NULL); | |
2128 | sn->date_sec = tv.tv_sec; | |
2129 | sn->date_nsec = tv.tv_usec * 1000; | |
2130 | #endif | |
74475455 | 2131 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2132 | |
7d631a11 MDCF |
2133 | if (name) { |
2134 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2135 | if (ret >= 0) { | |
2136 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2137 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2138 | } else { | |
2139 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2140 | } | |
2141 | } else { | |
2142 | #ifdef _WIN32 | |
55dd9ffa SW |
2143 | time_t t = tb.time; |
2144 | ptm = localtime(&t); | |
7d631a11 MDCF |
2145 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2146 | #else | |
d7d9b528 BS |
2147 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2148 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2149 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2150 | #endif | |
2151 | } | |
2152 | ||
cb499fb2 | 2153 | /* Delete old snapshots of the same name */ |
f139a412 | 2154 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2155 | goto the_end; |
2156 | } | |
2157 | ||
a672b469 | 2158 | /* save the VM state */ |
45566e9c | 2159 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2160 | if (!f) { |
376253ec | 2161 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2162 | goto the_end; |
2163 | } | |
e1c37d0e | 2164 | ret = qemu_savevm_state(f); |
2d22b18f | 2165 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2166 | qemu_fclose(f); |
2167 | if (ret < 0) { | |
376253ec | 2168 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2169 | goto the_end; |
2170 | } | |
2171 | ||
2172 | /* create the snapshots */ | |
2173 | ||
dbc13590 MA |
2174 | bs1 = NULL; |
2175 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2176 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2177 | /* Write VM state size only to the image that contains the state */ |
2178 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2179 | ret = bdrv_snapshot_create(bs1, sn); |
2180 | if (ret < 0) { | |
376253ec AL |
2181 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2182 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2183 | } |
2184 | } | |
2185 | } | |
2186 | ||
2187 | the_end: | |
2188 | if (saved_vm_running) | |
2189 | vm_start(); | |
2190 | } | |
2191 | ||
a7ae8355 SS |
2192 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2193 | { | |
2194 | QEMUFile *f; | |
2195 | int saved_vm_running; | |
2196 | int ret; | |
2197 | ||
2198 | saved_vm_running = runstate_is_running(); | |
2199 | vm_stop(RUN_STATE_SAVE_VM); | |
2200 | ||
2201 | f = qemu_fopen(filename, "wb"); | |
2202 | if (!f) { | |
2203 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2204 | goto the_end; | |
2205 | } | |
2206 | ret = qemu_save_device_state(f); | |
2207 | qemu_fclose(f); | |
2208 | if (ret < 0) { | |
2209 | error_set(errp, QERR_IO_ERROR); | |
2210 | } | |
2211 | ||
2212 | the_end: | |
2213 | if (saved_vm_running) | |
2214 | vm_start(); | |
a7ae8355 SS |
2215 | } |
2216 | ||
03cd4655 | 2217 | int load_vmstate(const char *name) |
a672b469 | 2218 | { |
f0aa7a8b | 2219 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2220 | QEMUSnapshotInfo sn; |
a672b469 | 2221 | QEMUFile *f; |
751c6a17 | 2222 | int ret; |
a672b469 | 2223 | |
f0aa7a8b MDCF |
2224 | bs_vm_state = bdrv_snapshots(); |
2225 | if (!bs_vm_state) { | |
2226 | error_report("No block device supports snapshots"); | |
2227 | return -ENOTSUP; | |
2228 | } | |
2229 | ||
2230 | /* Don't even try to load empty VM states */ | |
2231 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2232 | if (ret < 0) { | |
2233 | return ret; | |
2234 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2235 | error_report("This is a disk-only snapshot. Revert to it offline " |
2236 | "using qemu-img."); | |
f0aa7a8b MDCF |
2237 | return -EINVAL; |
2238 | } | |
2239 | ||
2240 | /* Verify if there is any device that doesn't support snapshots and is | |
2241 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2242 | bs = NULL; |
2243 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2244 | |
07b70bfb | 2245 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2246 | continue; |
2247 | } | |
2248 | ||
2249 | if (!bdrv_can_snapshot(bs)) { | |
2250 | error_report("Device '%s' is writable but does not support snapshots.", | |
2251 | bdrv_get_device_name(bs)); | |
2252 | return -ENOTSUP; | |
2253 | } | |
feeee5ac | 2254 | |
f0aa7a8b MDCF |
2255 | ret = bdrv_snapshot_find(bs, &sn, name); |
2256 | if (ret < 0) { | |
2257 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2258 | bdrv_get_device_name(bs), name); | |
2259 | return ret; | |
2260 | } | |
a672b469 AL |
2261 | } |
2262 | ||
2263 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2264 | bdrv_drain_all(); |
a672b469 | 2265 | |
f0aa7a8b MDCF |
2266 | bs = NULL; |
2267 | while ((bs = bdrv_next(bs))) { | |
2268 | if (bdrv_can_snapshot(bs)) { | |
2269 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2270 | if (ret < 0) { |
f0aa7a8b MDCF |
2271 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2272 | ret, name, bdrv_get_device_name(bs)); | |
2273 | return ret; | |
a672b469 AL |
2274 | } |
2275 | } | |
2276 | } | |
2277 | ||
a672b469 | 2278 | /* restore the VM state */ |
f0aa7a8b | 2279 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2280 | if (!f) { |
1ecda02b | 2281 | error_report("Could not open VM state file"); |
05f2401e | 2282 | return -EINVAL; |
a672b469 | 2283 | } |
f0aa7a8b | 2284 | |
5a8a49d7 | 2285 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2286 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2287 | |
a672b469 AL |
2288 | qemu_fclose(f); |
2289 | if (ret < 0) { | |
1ecda02b | 2290 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2291 | return ret; |
a672b469 | 2292 | } |
f0aa7a8b | 2293 | |
05f2401e | 2294 | return 0; |
7b630349 JQ |
2295 | } |
2296 | ||
d54908a5 | 2297 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2298 | { |
2299 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2300 | int ret; |
d54908a5 | 2301 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2302 | |
f9092b10 | 2303 | bs = bdrv_snapshots(); |
a672b469 | 2304 | if (!bs) { |
376253ec | 2305 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2306 | return; |
2307 | } | |
2308 | ||
dbc13590 MA |
2309 | bs1 = NULL; |
2310 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2311 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2312 | ret = bdrv_snapshot_delete(bs1, name); |
2313 | if (ret < 0) { | |
2314 | if (ret == -ENOTSUP) | |
376253ec AL |
2315 | monitor_printf(mon, |
2316 | "Snapshots not supported on device '%s'\n", | |
2317 | bdrv_get_device_name(bs1)); | |
a672b469 | 2318 | else |
376253ec AL |
2319 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2320 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2321 | } |
2322 | } | |
2323 | } | |
2324 | } | |
2325 | ||
376253ec | 2326 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2327 | { |
2328 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2329 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2330 | int nb_sns, i, ret, available; | |
2331 | int total; | |
2332 | int *available_snapshots; | |
a672b469 AL |
2333 | char buf[256]; |
2334 | ||
f9092b10 | 2335 | bs = bdrv_snapshots(); |
a672b469 | 2336 | if (!bs) { |
376253ec | 2337 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2338 | return; |
2339 | } | |
a672b469 AL |
2340 | |
2341 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2342 | if (nb_sns < 0) { | |
376253ec | 2343 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2344 | return; |
2345 | } | |
f9209915 MDCF |
2346 | |
2347 | if (nb_sns == 0) { | |
2348 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2349 | return; | |
2350 | } | |
2351 | ||
7267c094 | 2352 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2353 | total = 0; |
2354 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2355 | sn = &sn_tab[i]; |
f9209915 MDCF |
2356 | available = 1; |
2357 | bs1 = NULL; | |
2358 | ||
2359 | while ((bs1 = bdrv_next(bs1))) { | |
2360 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2361 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2362 | if (ret < 0) { | |
2363 | available = 0; | |
2364 | break; | |
2365 | } | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | if (available) { | |
2370 | available_snapshots[total] = i; | |
2371 | total++; | |
2372 | } | |
a672b469 | 2373 | } |
f9209915 MDCF |
2374 | |
2375 | if (total > 0) { | |
2376 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2377 | for (i = 0; i < total; i++) { | |
2378 | sn = &sn_tab[available_snapshots[i]]; | |
2379 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2380 | } | |
2381 | } else { | |
2382 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2383 | } | |
2384 | ||
7267c094 AL |
2385 | g_free(sn_tab); |
2386 | g_free(available_snapshots); | |
f9209915 | 2387 | |
a672b469 | 2388 | } |
c5705a77 AK |
2389 | |
2390 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2391 | { | |
1ddde087 | 2392 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2393 | memory_region_name(mr), dev); |
2394 | } | |
2395 | ||
2396 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2397 | { | |
2398 | /* Nothing do to while the implementation is in RAMBlock */ | |
2399 | } | |
2400 | ||
2401 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2402 | { | |
2403 | vmstate_register_ram(mr, NULL); | |
2404 | } | |
302dfbeb OW |
2405 | |
2406 | /* | |
2407 | page = zrun nzrun | |
2408 | | zrun nzrun page | |
2409 | ||
2410 | zrun = length | |
2411 | ||
2412 | nzrun = length byte... | |
2413 | ||
2414 | length = uleb128 encoded integer | |
2415 | */ | |
2416 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2417 | uint8_t *dst, int dlen) | |
2418 | { | |
2419 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2420 | int d = 0, i = 0; | |
2421 | long res, xor; | |
2422 | uint8_t *nzrun_start = NULL; | |
2423 | ||
2424 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2425 | sizeof(long))); | |
2426 | ||
2427 | while (i < slen) { | |
2428 | /* overflow */ | |
2429 | if (d + 2 > dlen) { | |
2430 | return -1; | |
2431 | } | |
2432 | ||
2433 | /* not aligned to sizeof(long) */ | |
2434 | res = (slen - i) % sizeof(long); | |
2435 | while (res && old_buf[i] == new_buf[i]) { | |
2436 | zrun_len++; | |
2437 | i++; | |
2438 | res--; | |
2439 | } | |
2440 | ||
2441 | /* word at a time for speed */ | |
2442 | if (!res) { | |
2443 | while (i < slen && | |
2444 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2445 | i += sizeof(long); | |
2446 | zrun_len += sizeof(long); | |
2447 | } | |
2448 | ||
2449 | /* go over the rest */ | |
2450 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2451 | zrun_len++; | |
2452 | i++; | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | /* buffer unchanged */ | |
2457 | if (zrun_len == slen) { | |
2458 | return 0; | |
2459 | } | |
2460 | ||
2461 | /* skip last zero run */ | |
2462 | if (i == slen) { | |
2463 | return d; | |
2464 | } | |
2465 | ||
2466 | d += uleb128_encode_small(dst + d, zrun_len); | |
2467 | ||
2468 | zrun_len = 0; | |
2469 | nzrun_start = new_buf + i; | |
2470 | ||
2471 | /* overflow */ | |
2472 | if (d + 2 > dlen) { | |
2473 | return -1; | |
2474 | } | |
2475 | /* not aligned to sizeof(long) */ | |
2476 | res = (slen - i) % sizeof(long); | |
2477 | while (res && old_buf[i] != new_buf[i]) { | |
2478 | i++; | |
2479 | nzrun_len++; | |
2480 | res--; | |
2481 | } | |
2482 | ||
2483 | /* word at a time for speed, use of 32-bit long okay */ | |
2484 | if (!res) { | |
2485 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2486 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2487 | while (i < slen) { |
2488 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2489 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2490 | /* found the end of an nzrun within the current long */ | |
2491 | while (old_buf[i] != new_buf[i]) { | |
2492 | nzrun_len++; | |
2493 | i++; | |
2494 | } | |
2495 | break; | |
2496 | } else { | |
2497 | i += sizeof(long); | |
2498 | nzrun_len += sizeof(long); | |
2499 | } | |
2500 | } | |
2501 | } | |
2502 | ||
2503 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2504 | /* overflow */ | |
2505 | if (d + nzrun_len > dlen) { | |
2506 | return -1; | |
2507 | } | |
2508 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2509 | d += nzrun_len; | |
2510 | nzrun_len = 0; | |
2511 | } | |
2512 | ||
2513 | return d; | |
2514 | } | |
2515 | ||
2516 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2517 | { | |
2518 | int i = 0, d = 0; | |
2519 | int ret; | |
2520 | uint32_t count = 0; | |
2521 | ||
2522 | while (i < slen) { | |
2523 | ||
2524 | /* zrun */ | |
2525 | if ((slen - i) < 2) { | |
2526 | return -1; | |
2527 | } | |
2528 | ||
2529 | ret = uleb128_decode_small(src + i, &count); | |
2530 | if (ret < 0 || (i && !count)) { | |
2531 | return -1; | |
2532 | } | |
2533 | i += ret; | |
2534 | d += count; | |
2535 | ||
2536 | /* overflow */ | |
2537 | if (d > dlen) { | |
2538 | return -1; | |
2539 | } | |
2540 | ||
2541 | /* nzrun */ | |
2542 | if ((slen - i) < 2) { | |
2543 | return -1; | |
2544 | } | |
2545 | ||
2546 | ret = uleb128_decode_small(src + i, &count); | |
2547 | if (ret < 0 || !count) { | |
2548 | return -1; | |
2549 | } | |
2550 | i += ret; | |
2551 | ||
2552 | /* overflow */ | |
2553 | if (d + count > dlen || i + count > slen) { | |
2554 | return -1; | |
2555 | } | |
2556 | ||
2557 | memcpy(dst + d, src + i, count); | |
2558 | d += count; | |
2559 | i += count; | |
2560 | } | |
2561 | ||
2562 | return d; | |
2563 | } |