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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 | 24 | |
d40cdb10 | 25 | #include "config-host.h" |
511d2b14 BS |
26 | #include "qemu-common.h" |
27 | #include "hw/hw.h" | |
7685ee6a | 28 | #include "hw/qdev.h" |
1422e32d | 29 | #include "net/net.h" |
83c9089e | 30 | #include "monitor/monitor.h" |
9c17d615 | 31 | #include "sysemu/sysemu.h" |
1de7afc9 | 32 | #include "qemu/timer.h" |
511d2b14 | 33 | #include "audio/audio.h" |
caf71f86 | 34 | #include "migration/migration.h" |
1de7afc9 PB |
35 | #include "qemu/sockets.h" |
36 | #include "qemu/queue.h" | |
9c17d615 | 37 | #include "sysemu/cpus.h" |
022c62cb | 38 | #include "exec/memory.h" |
a7ae8355 | 39 | #include "qmp-commands.h" |
517a13c9 | 40 | #include "trace.h" |
1de7afc9 | 41 | #include "qemu/bitops.h" |
511d2b14 | 42 | |
a672b469 | 43 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 44 | |
18995b98 | 45 | #ifndef ETH_P_RARP |
f8778a77 | 46 | #define ETH_P_RARP 0x8035 |
18995b98 N |
47 | #endif |
48 | #define ARP_HTYPE_ETH 0x0001 | |
49 | #define ARP_PTYPE_IP 0x0800 | |
50 | #define ARP_OP_REQUEST_REV 0x3 | |
51 | ||
52 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
53 | uint8_t *mac_addr) |
54 | { | |
18995b98 N |
55 | /* Ethernet header. */ |
56 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
57 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
58 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
59 | ||
60 | /* RARP header. */ | |
61 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
62 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
63 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
64 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
65 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
66 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
67 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
68 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
69 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
70 | ||
71 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
72 | memset(buf + 42, 0x00, 18); | |
73 | ||
74 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
75 | } |
76 | ||
f401ca22 | 77 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 78 | { |
18995b98 | 79 | uint8_t buf[60]; |
f401ca22 MM |
80 | int len; |
81 | ||
82 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
83 | ||
b356f76d | 84 | qemu_send_packet_raw(qemu_get_queue(nic), buf, len); |
f401ca22 MM |
85 | } |
86 | ||
87 | ||
88 | static void qemu_announce_self_once(void *opaque) | |
89 | { | |
ed8b330b GN |
90 | static int count = SELF_ANNOUNCE_ROUNDS; |
91 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 92 | |
f401ca22 MM |
93 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
94 | ||
18995b98 N |
95 | if (--count) { |
96 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 97 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 98 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
99 | } else { |
100 | qemu_del_timer(timer); | |
101 | qemu_free_timer(timer); | |
102 | } | |
103 | } | |
104 | ||
105 | void qemu_announce_self(void) | |
106 | { | |
107 | static QEMUTimer *timer; | |
7bd427d8 | 108 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 109 | qemu_announce_self_once(&timer); |
a672b469 AL |
110 | } |
111 | ||
112 | /***********************************************************/ | |
113 | /* savevm/loadvm support */ | |
114 | ||
115 | #define IO_BUF_SIZE 32768 | |
116 | ||
117 | struct QEMUFile { | |
9229bf3c | 118 | const QEMUFileOps *ops; |
a672b469 AL |
119 | void *opaque; |
120 | int is_write; | |
121 | ||
122 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
123 | when reading */ | |
124 | int buf_index; | |
125 | int buf_size; /* 0 when writing */ | |
126 | uint8_t buf[IO_BUF_SIZE]; | |
127 | ||
3961b4dd | 128 | int last_error; |
a672b469 AL |
129 | }; |
130 | ||
7f79dd28 | 131 | typedef struct QEMUFileStdio |
a672b469 | 132 | { |
7f79dd28 | 133 | FILE *stdio_file; |
a672b469 | 134 | QEMUFile *file; |
7f79dd28 | 135 | } QEMUFileStdio; |
a672b469 AL |
136 | |
137 | typedef struct QEMUFileSocket | |
138 | { | |
139 | int fd; | |
140 | QEMUFile *file; | |
141 | } QEMUFileSocket; | |
142 | ||
d7cd3694 SH |
143 | typedef struct { |
144 | Coroutine *co; | |
145 | int fd; | |
146 | } FDYieldUntilData; | |
147 | ||
148 | static void fd_coroutine_enter(void *opaque) | |
149 | { | |
150 | FDYieldUntilData *data = opaque; | |
151 | qemu_set_fd_handler(data->fd, NULL, NULL, NULL); | |
152 | qemu_coroutine_enter(data->co, NULL); | |
153 | } | |
154 | ||
155 | /** | |
156 | * Yield until a file descriptor becomes readable | |
157 | * | |
158 | * Note that this function clobbers the handlers for the file descriptor. | |
159 | */ | |
160 | static void coroutine_fn yield_until_fd_readable(int fd) | |
161 | { | |
162 | FDYieldUntilData data; | |
163 | ||
164 | assert(qemu_in_coroutine()); | |
165 | data.co = qemu_coroutine_self(); | |
166 | data.fd = fd; | |
167 | qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data); | |
168 | qemu_coroutine_yield(); | |
169 | } | |
170 | ||
70eb6330 PB |
171 | static int socket_get_fd(void *opaque) |
172 | { | |
173 | QEMUFileSocket *s = opaque; | |
174 | ||
175 | return s->fd; | |
176 | } | |
177 | ||
a672b469 AL |
178 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
179 | { | |
180 | QEMUFileSocket *s = opaque; | |
181 | ssize_t len; | |
182 | ||
595ab641 | 183 | for (;;) { |
00aa0040 | 184 | len = qemu_recv(s->fd, buf, size, 0); |
595ab641 PB |
185 | if (len != -1) { |
186 | break; | |
187 | } | |
188 | if (socket_error() == EAGAIN) { | |
d7cd3694 | 189 | yield_until_fd_readable(s->fd); |
595ab641 PB |
190 | } else if (socket_error() != EINTR) { |
191 | break; | |
192 | } | |
193 | } | |
a672b469 | 194 | |
595ab641 | 195 | if (len == -1) { |
a672b469 | 196 | len = -socket_error(); |
595ab641 | 197 | } |
a672b469 AL |
198 | return len; |
199 | } | |
200 | ||
201 | static int socket_close(void *opaque) | |
202 | { | |
203 | QEMUFileSocket *s = opaque; | |
ab52a824 | 204 | closesocket(s->fd); |
7267c094 | 205 | g_free(s); |
a672b469 AL |
206 | return 0; |
207 | } | |
208 | ||
70eb6330 PB |
209 | static int stdio_get_fd(void *opaque) |
210 | { | |
211 | QEMUFileStdio *s = opaque; | |
212 | ||
213 | return fileno(s->stdio_file); | |
214 | } | |
215 | ||
7f79dd28 | 216 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 217 | { |
7f79dd28 PB |
218 | QEMUFileStdio *s = opaque; |
219 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
220 | } |
221 | ||
7f79dd28 | 222 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 223 | { |
7f79dd28 PB |
224 | QEMUFileStdio *s = opaque; |
225 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
226 | int bytes; |
227 | ||
595ab641 | 228 | for (;;) { |
8a67ec4d UL |
229 | clearerr(fp); |
230 | bytes = fread(buf, 1, size, fp); | |
595ab641 PB |
231 | if (bytes != 0 || !ferror(fp)) { |
232 | break; | |
233 | } | |
234 | if (errno == EAGAIN) { | |
d7cd3694 | 235 | yield_until_fd_readable(fileno(fp)); |
595ab641 PB |
236 | } else if (errno != EINTR) { |
237 | break; | |
238 | } | |
239 | } | |
8a67ec4d | 240 | return bytes; |
a672b469 AL |
241 | } |
242 | ||
7f79dd28 PB |
243 | static int stdio_pclose(void *opaque) |
244 | { | |
245 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
246 | int ret; |
247 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
248 | if (ret == -1) { |
249 | ret = -errno; | |
250 | } | |
7267c094 | 251 | g_free(s); |
41ef56e6 | 252 | return ret; |
7f79dd28 PB |
253 | } |
254 | ||
255 | static int stdio_fclose(void *opaque) | |
a672b469 | 256 | { |
7f79dd28 | 257 | QEMUFileStdio *s = opaque; |
0e286705 EH |
258 | int ret = 0; |
259 | if (fclose(s->stdio_file) == EOF) { | |
260 | ret = -errno; | |
261 | } | |
7267c094 | 262 | g_free(s); |
0e286705 | 263 | return ret; |
a672b469 AL |
264 | } |
265 | ||
9229bf3c | 266 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 267 | .get_fd = stdio_get_fd, |
9229bf3c PB |
268 | .get_buffer = stdio_get_buffer, |
269 | .close = stdio_pclose | |
270 | }; | |
271 | ||
272 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 273 | .get_fd = stdio_get_fd, |
9229bf3c PB |
274 | .put_buffer = stdio_put_buffer, |
275 | .close = stdio_pclose | |
276 | }; | |
277 | ||
7f79dd28 | 278 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 279 | { |
7f79dd28 | 280 | QEMUFileStdio *s; |
a672b469 | 281 | |
7f79dd28 | 282 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
283 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
284 | return NULL; | |
285 | } | |
286 | ||
7267c094 | 287 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 288 | |
7f79dd28 | 289 | s->stdio_file = stdio_file; |
a672b469 AL |
290 | |
291 | if(mode[0] == 'r') { | |
9229bf3c | 292 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 293 | } else { |
9229bf3c | 294 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 295 | } |
a672b469 AL |
296 | return s->file; |
297 | } | |
298 | ||
299 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
300 | { | |
301 | FILE *popen_file; | |
302 | ||
303 | popen_file = popen(command, mode); | |
304 | if(popen_file == NULL) { | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | return qemu_popen(popen_file, mode); | |
309 | } | |
310 | ||
9229bf3c | 311 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 312 | .get_fd = stdio_get_fd, |
9229bf3c PB |
313 | .get_buffer = stdio_get_buffer, |
314 | .close = stdio_fclose | |
315 | }; | |
316 | ||
317 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 318 | .get_fd = stdio_get_fd, |
9229bf3c PB |
319 | .put_buffer = stdio_put_buffer, |
320 | .close = stdio_fclose | |
321 | }; | |
322 | ||
5ac1fad3 PB |
323 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
324 | { | |
325 | QEMUFileStdio *s; | |
326 | ||
327 | if (mode == NULL || | |
328 | (mode[0] != 'r' && mode[0] != 'w') || | |
329 | mode[1] != 'b' || mode[2] != 0) { | |
330 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
331 | return NULL; | |
332 | } | |
333 | ||
7267c094 | 334 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
335 | s->stdio_file = fdopen(fd, mode); |
336 | if (!s->stdio_file) | |
337 | goto fail; | |
338 | ||
339 | if(mode[0] == 'r') { | |
9229bf3c | 340 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 341 | } else { |
9229bf3c | 342 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
343 | } |
344 | return s->file; | |
345 | ||
346 | fail: | |
7267c094 | 347 | g_free(s); |
5ac1fad3 PB |
348 | return NULL; |
349 | } | |
350 | ||
9229bf3c | 351 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 352 | .get_fd = socket_get_fd, |
9229bf3c PB |
353 | .get_buffer = socket_get_buffer, |
354 | .close = socket_close | |
355 | }; | |
356 | ||
a672b469 AL |
357 | QEMUFile *qemu_fopen_socket(int fd) |
358 | { | |
7267c094 | 359 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 360 | |
a672b469 | 361 | s->fd = fd; |
9229bf3c | 362 | s->file = qemu_fopen_ops(s, &socket_read_ops); |
a672b469 AL |
363 | return s->file; |
364 | } | |
365 | ||
a672b469 AL |
366 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
367 | { | |
368 | QEMUFileStdio *s; | |
369 | ||
7f79dd28 PB |
370 | if (mode == NULL || |
371 | (mode[0] != 'r' && mode[0] != 'w') || | |
372 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 373 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
374 | return NULL; |
375 | } | |
376 | ||
7267c094 | 377 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 378 | |
7f79dd28 PB |
379 | s->stdio_file = fopen(filename, mode); |
380 | if (!s->stdio_file) | |
a672b469 | 381 | goto fail; |
c163b5ca | 382 | |
7f79dd28 | 383 | if(mode[0] == 'w') { |
9229bf3c | 384 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 385 | } else { |
9229bf3c | 386 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
387 | } |
388 | return s->file; | |
a672b469 | 389 | fail: |
7267c094 | 390 | g_free(s); |
a672b469 AL |
391 | return NULL; |
392 | } | |
393 | ||
178e08a5 | 394 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
395 | int64_t pos, int size) |
396 | { | |
45566e9c | 397 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
398 | return size; |
399 | } | |
400 | ||
178e08a5 | 401 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 402 | { |
45566e9c | 403 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
404 | } |
405 | ||
406 | static int bdrv_fclose(void *opaque) | |
407 | { | |
ad492c92 | 408 | return bdrv_flush(opaque); |
a672b469 AL |
409 | } |
410 | ||
9229bf3c PB |
411 | static const QEMUFileOps bdrv_read_ops = { |
412 | .get_buffer = block_get_buffer, | |
413 | .close = bdrv_fclose | |
414 | }; | |
415 | ||
416 | static const QEMUFileOps bdrv_write_ops = { | |
417 | .put_buffer = block_put_buffer, | |
418 | .close = bdrv_fclose | |
419 | }; | |
420 | ||
45566e9c | 421 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 422 | { |
a672b469 | 423 | if (is_writable) |
9229bf3c PB |
424 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
425 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
426 | } |
427 | ||
9229bf3c | 428 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
429 | { |
430 | QEMUFile *f; | |
431 | ||
7267c094 | 432 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
433 | |
434 | f->opaque = opaque; | |
9229bf3c | 435 | f->ops = ops; |
a672b469 AL |
436 | f->is_write = 0; |
437 | ||
438 | return f; | |
439 | } | |
440 | ||
624b9cc2 | 441 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 442 | { |
3961b4dd | 443 | return f->last_error; |
a672b469 AL |
444 | } |
445 | ||
6f121ff5 | 446 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 447 | { |
afe41931 JQ |
448 | if (f->last_error == 0) { |
449 | f->last_error = ret; | |
450 | } | |
4dabe248 AL |
451 | } |
452 | ||
d82ca915 EH |
453 | /** Flushes QEMUFile buffer |
454 | * | |
d82ca915 | 455 | */ |
7311bea3 | 456 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 457 | { |
7311bea3 JQ |
458 | int ret = 0; |
459 | ||
9229bf3c | 460 | if (!f->ops->put_buffer) |
7311bea3 | 461 | return 0; |
a672b469 AL |
462 | |
463 | if (f->is_write && f->buf_index > 0) { | |
9229bf3c | 464 | ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
7311bea3 | 465 | if (ret >= 0) { |
a672b469 | 466 | f->buf_offset += f->buf_index; |
7311bea3 | 467 | } |
a672b469 AL |
468 | f->buf_index = 0; |
469 | } | |
7311bea3 | 470 | return ret; |
a672b469 AL |
471 | } |
472 | ||
473 | static void qemu_fill_buffer(QEMUFile *f) | |
474 | { | |
475 | int len; | |
0046c45b | 476 | int pending; |
a672b469 | 477 | |
9229bf3c | 478 | if (!f->ops->get_buffer) |
a672b469 AL |
479 | return; |
480 | ||
481 | if (f->is_write) | |
482 | abort(); | |
483 | ||
0046c45b JQ |
484 | pending = f->buf_size - f->buf_index; |
485 | if (pending > 0) { | |
486 | memmove(f->buf, f->buf + f->buf_index, pending); | |
487 | } | |
488 | f->buf_index = 0; | |
489 | f->buf_size = pending; | |
490 | ||
9229bf3c | 491 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
0046c45b | 492 | IO_BUF_SIZE - pending); |
a672b469 | 493 | if (len > 0) { |
0046c45b | 494 | f->buf_size += len; |
a672b469 | 495 | f->buf_offset += len; |
fa39a30f | 496 | } else if (len == 0) { |
02c4a051 | 497 | qemu_file_set_error(f, -EIO); |
a672b469 | 498 | } else if (len != -EAGAIN) |
c29110d5 | 499 | qemu_file_set_error(f, len); |
a672b469 AL |
500 | } |
501 | ||
70eb6330 PB |
502 | int qemu_get_fd(QEMUFile *f) |
503 | { | |
504 | if (f->ops->get_fd) { | |
505 | return f->ops->get_fd(f->opaque); | |
506 | } | |
507 | return -1; | |
508 | } | |
509 | ||
d82ca915 EH |
510 | /** Closes the file |
511 | * | |
512 | * Returns negative error value if any error happened on previous operations or | |
513 | * while closing the file. Returns 0 or positive number on success. | |
514 | * | |
515 | * The meaning of return value on success depends on the specific backend | |
516 | * being used. | |
517 | */ | |
518 | int qemu_fclose(QEMUFile *f) | |
519 | { | |
29eee86f | 520 | int ret; |
7311bea3 | 521 | ret = qemu_fflush(f); |
7311bea3 | 522 | |
9229bf3c PB |
523 | if (f->ops->close) { |
524 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
525 | if (ret >= 0) { |
526 | ret = ret2; | |
527 | } | |
7311bea3 | 528 | } |
d82ca915 EH |
529 | /* If any error was spotted before closing, we should report it |
530 | * instead of the close() return value. | |
531 | */ | |
532 | if (f->last_error) { | |
533 | ret = f->last_error; | |
534 | } | |
7267c094 | 535 | g_free(f); |
a672b469 AL |
536 | return ret; |
537 | } | |
538 | ||
a672b469 AL |
539 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
540 | { | |
541 | int l; | |
542 | ||
c10682cb JQ |
543 | if (f->last_error) { |
544 | return; | |
545 | } | |
546 | ||
547 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
548 | fprintf(stderr, |
549 | "Attempted to write to buffer while read buffer is not empty\n"); | |
550 | abort(); | |
551 | } | |
552 | ||
c10682cb | 553 | while (size > 0) { |
a672b469 AL |
554 | l = IO_BUF_SIZE - f->buf_index; |
555 | if (l > size) | |
556 | l = size; | |
557 | memcpy(f->buf + f->buf_index, buf, l); | |
558 | f->is_write = 1; | |
559 | f->buf_index += l; | |
560 | buf += l; | |
561 | size -= l; | |
7311bea3 JQ |
562 | if (f->buf_index >= IO_BUF_SIZE) { |
563 | int ret = qemu_fflush(f); | |
c10682cb JQ |
564 | if (ret < 0) { |
565 | qemu_file_set_error(f, ret); | |
566 | break; | |
567 | } | |
7311bea3 | 568 | } |
a672b469 AL |
569 | } |
570 | } | |
571 | ||
572 | void qemu_put_byte(QEMUFile *f, int v) | |
573 | { | |
c10682cb JQ |
574 | if (f->last_error) { |
575 | return; | |
576 | } | |
577 | ||
578 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
579 | fprintf(stderr, |
580 | "Attempted to write to buffer while read buffer is not empty\n"); | |
581 | abort(); | |
582 | } | |
583 | ||
584 | f->buf[f->buf_index++] = v; | |
585 | f->is_write = 1; | |
7311bea3 JQ |
586 | if (f->buf_index >= IO_BUF_SIZE) { |
587 | int ret = qemu_fflush(f); | |
c10682cb JQ |
588 | if (ret < 0) { |
589 | qemu_file_set_error(f, ret); | |
590 | } | |
7311bea3 | 591 | } |
a672b469 AL |
592 | } |
593 | ||
c6380724 | 594 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 595 | { |
c6380724 JQ |
596 | if (f->buf_index + size <= f->buf_size) { |
597 | f->buf_index += size; | |
598 | } | |
599 | } | |
600 | ||
601 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 602 | { |
c6380724 JQ |
603 | int pending; |
604 | int index; | |
a672b469 | 605 | |
b9ce1454 | 606 | if (f->is_write) { |
a672b469 | 607 | abort(); |
b9ce1454 | 608 | } |
a672b469 | 609 | |
c6380724 JQ |
610 | index = f->buf_index + offset; |
611 | pending = f->buf_size - index; | |
612 | if (pending < size) { | |
613 | qemu_fill_buffer(f); | |
614 | index = f->buf_index + offset; | |
615 | pending = f->buf_size - index; | |
616 | } | |
617 | ||
618 | if (pending <= 0) { | |
619 | return 0; | |
620 | } | |
621 | if (size > pending) { | |
622 | size = pending; | |
623 | } | |
624 | ||
625 | memcpy(buf, f->buf + index, size); | |
626 | return size; | |
627 | } | |
628 | ||
629 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
630 | { | |
631 | int pending = size; | |
632 | int done = 0; | |
633 | ||
634 | while (pending > 0) { | |
635 | int res; | |
636 | ||
637 | res = qemu_peek_buffer(f, buf, pending, 0); | |
638 | if (res == 0) { | |
639 | return done; | |
a672b469 | 640 | } |
c6380724 JQ |
641 | qemu_file_skip(f, res); |
642 | buf += res; | |
643 | pending -= res; | |
644 | done += res; | |
a672b469 | 645 | } |
c6380724 | 646 | return done; |
a672b469 AL |
647 | } |
648 | ||
c6380724 | 649 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 650 | { |
c6380724 JQ |
651 | int index = f->buf_index + offset; |
652 | ||
b9ce1454 | 653 | if (f->is_write) { |
811814bd | 654 | abort(); |
b9ce1454 | 655 | } |
811814bd | 656 | |
c6380724 | 657 | if (index >= f->buf_size) { |
811814bd | 658 | qemu_fill_buffer(f); |
c6380724 JQ |
659 | index = f->buf_index + offset; |
660 | if (index >= f->buf_size) { | |
811814bd | 661 | return 0; |
b9ce1454 | 662 | } |
811814bd | 663 | } |
c6380724 | 664 | return f->buf[index]; |
811814bd JQ |
665 | } |
666 | ||
a672b469 AL |
667 | int qemu_get_byte(QEMUFile *f) |
668 | { | |
65f3bb3d | 669 | int result; |
a672b469 | 670 | |
c6380724 JQ |
671 | result = qemu_peek_byte(f, 0); |
672 | qemu_file_skip(f, 1); | |
65f3bb3d | 673 | return result; |
a672b469 AL |
674 | } |
675 | ||
3aee4be1 | 676 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
677 | { |
678 | return f->buf_offset - f->buf_size + f->buf_index; | |
679 | } | |
680 | ||
a672b469 AL |
681 | int qemu_file_rate_limit(QEMUFile *f) |
682 | { | |
9229bf3c PB |
683 | if (f->ops->rate_limit) |
684 | return f->ops->rate_limit(f->opaque); | |
a672b469 AL |
685 | |
686 | return 0; | |
687 | } | |
688 | ||
3d002df3 | 689 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 690 | { |
9229bf3c PB |
691 | if (f->ops->get_rate_limit) |
692 | return f->ops->get_rate_limit(f->opaque); | |
c163b5ca | 693 | |
694 | return 0; | |
695 | } | |
696 | ||
3d002df3 | 697 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 698 | { |
0bb05eaf GC |
699 | /* any failed or completed migration keeps its state to allow probing of |
700 | * migration data, but has no associated file anymore */ | |
9229bf3c PB |
701 | if (f && f->ops->set_rate_limit) |
702 | return f->ops->set_rate_limit(f->opaque, new_rate); | |
19629537 GC |
703 | |
704 | return 0; | |
705 | } | |
706 | ||
a672b469 AL |
707 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
708 | { | |
709 | qemu_put_byte(f, v >> 8); | |
710 | qemu_put_byte(f, v); | |
711 | } | |
712 | ||
713 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
714 | { | |
715 | qemu_put_byte(f, v >> 24); | |
716 | qemu_put_byte(f, v >> 16); | |
717 | qemu_put_byte(f, v >> 8); | |
718 | qemu_put_byte(f, v); | |
719 | } | |
720 | ||
721 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
722 | { | |
723 | qemu_put_be32(f, v >> 32); | |
724 | qemu_put_be32(f, v); | |
725 | } | |
726 | ||
727 | unsigned int qemu_get_be16(QEMUFile *f) | |
728 | { | |
729 | unsigned int v; | |
730 | v = qemu_get_byte(f) << 8; | |
731 | v |= qemu_get_byte(f); | |
732 | return v; | |
733 | } | |
734 | ||
735 | unsigned int qemu_get_be32(QEMUFile *f) | |
736 | { | |
737 | unsigned int v; | |
738 | v = qemu_get_byte(f) << 24; | |
739 | v |= qemu_get_byte(f) << 16; | |
740 | v |= qemu_get_byte(f) << 8; | |
741 | v |= qemu_get_byte(f); | |
742 | return v; | |
743 | } | |
744 | ||
745 | uint64_t qemu_get_be64(QEMUFile *f) | |
746 | { | |
747 | uint64_t v; | |
748 | v = (uint64_t)qemu_get_be32(f) << 32; | |
749 | v |= qemu_get_be32(f); | |
750 | return v; | |
751 | } | |
752 | ||
2ff68d07 PB |
753 | |
754 | /* timer */ | |
755 | ||
756 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
757 | { | |
758 | uint64_t expire_time; | |
759 | ||
760 | expire_time = qemu_timer_expire_time_ns(ts); | |
761 | qemu_put_be64(f, expire_time); | |
762 | } | |
763 | ||
764 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
765 | { | |
766 | uint64_t expire_time; | |
767 | ||
768 | expire_time = qemu_get_be64(f); | |
769 | if (expire_time != -1) { | |
770 | qemu_mod_timer_ns(ts, expire_time); | |
771 | } else { | |
772 | qemu_del_timer(ts); | |
773 | } | |
774 | } | |
775 | ||
776 | ||
cdae5cfb GH |
777 | /* bool */ |
778 | ||
779 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
780 | { | |
781 | bool *v = pv; | |
782 | *v = qemu_get_byte(f); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
787 | { | |
788 | bool *v = pv; | |
789 | qemu_put_byte(f, *v); | |
790 | } | |
791 | ||
792 | const VMStateInfo vmstate_info_bool = { | |
793 | .name = "bool", | |
794 | .get = get_bool, | |
795 | .put = put_bool, | |
796 | }; | |
797 | ||
9ed7d6ae JQ |
798 | /* 8 bit int */ |
799 | ||
800 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
801 | { | |
802 | int8_t *v = pv; | |
803 | qemu_get_s8s(f, v); | |
804 | return 0; | |
805 | } | |
806 | ||
84e2e3eb | 807 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 808 | { |
84e2e3eb | 809 | int8_t *v = pv; |
9ed7d6ae JQ |
810 | qemu_put_s8s(f, v); |
811 | } | |
812 | ||
813 | const VMStateInfo vmstate_info_int8 = { | |
814 | .name = "int8", | |
815 | .get = get_int8, | |
816 | .put = put_int8, | |
817 | }; | |
818 | ||
819 | /* 16 bit int */ | |
820 | ||
821 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
822 | { | |
823 | int16_t *v = pv; | |
824 | qemu_get_sbe16s(f, v); | |
825 | return 0; | |
826 | } | |
827 | ||
84e2e3eb | 828 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 829 | { |
84e2e3eb | 830 | int16_t *v = pv; |
9ed7d6ae JQ |
831 | qemu_put_sbe16s(f, v); |
832 | } | |
833 | ||
834 | const VMStateInfo vmstate_info_int16 = { | |
835 | .name = "int16", | |
836 | .get = get_int16, | |
837 | .put = put_int16, | |
838 | }; | |
839 | ||
840 | /* 32 bit int */ | |
841 | ||
842 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
843 | { | |
844 | int32_t *v = pv; | |
845 | qemu_get_sbe32s(f, v); | |
846 | return 0; | |
847 | } | |
848 | ||
84e2e3eb | 849 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 850 | { |
84e2e3eb | 851 | int32_t *v = pv; |
9ed7d6ae JQ |
852 | qemu_put_sbe32s(f, v); |
853 | } | |
854 | ||
855 | const VMStateInfo vmstate_info_int32 = { | |
856 | .name = "int32", | |
857 | .get = get_int32, | |
858 | .put = put_int32, | |
859 | }; | |
860 | ||
82501660 JQ |
861 | /* 32 bit int. See that the received value is the same than the one |
862 | in the field */ | |
863 | ||
864 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
865 | { | |
866 | int32_t *v = pv; | |
867 | int32_t v2; | |
868 | qemu_get_sbe32s(f, &v2); | |
869 | ||
870 | if (*v == v2) | |
871 | return 0; | |
872 | return -EINVAL; | |
873 | } | |
874 | ||
875 | const VMStateInfo vmstate_info_int32_equal = { | |
876 | .name = "int32 equal", | |
877 | .get = get_int32_equal, | |
878 | .put = put_int32, | |
879 | }; | |
880 | ||
0a031e0a JQ |
881 | /* 32 bit int. See that the received value is the less or the same |
882 | than the one in the field */ | |
883 | ||
884 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
885 | { | |
886 | int32_t *old = pv; | |
887 | int32_t new; | |
888 | qemu_get_sbe32s(f, &new); | |
889 | ||
890 | if (*old <= new) | |
891 | return 0; | |
892 | return -EINVAL; | |
893 | } | |
894 | ||
895 | const VMStateInfo vmstate_info_int32_le = { | |
896 | .name = "int32 equal", | |
897 | .get = get_int32_le, | |
898 | .put = put_int32, | |
899 | }; | |
900 | ||
9ed7d6ae JQ |
901 | /* 64 bit int */ |
902 | ||
903 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
904 | { | |
905 | int64_t *v = pv; | |
906 | qemu_get_sbe64s(f, v); | |
907 | return 0; | |
908 | } | |
909 | ||
84e2e3eb | 910 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 911 | { |
84e2e3eb | 912 | int64_t *v = pv; |
9ed7d6ae JQ |
913 | qemu_put_sbe64s(f, v); |
914 | } | |
915 | ||
916 | const VMStateInfo vmstate_info_int64 = { | |
917 | .name = "int64", | |
918 | .get = get_int64, | |
919 | .put = put_int64, | |
920 | }; | |
921 | ||
922 | /* 8 bit unsigned int */ | |
923 | ||
924 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
925 | { | |
926 | uint8_t *v = pv; | |
927 | qemu_get_8s(f, v); | |
928 | return 0; | |
929 | } | |
930 | ||
84e2e3eb | 931 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 932 | { |
84e2e3eb | 933 | uint8_t *v = pv; |
9ed7d6ae JQ |
934 | qemu_put_8s(f, v); |
935 | } | |
936 | ||
937 | const VMStateInfo vmstate_info_uint8 = { | |
938 | .name = "uint8", | |
939 | .get = get_uint8, | |
940 | .put = put_uint8, | |
941 | }; | |
942 | ||
943 | /* 16 bit unsigned int */ | |
944 | ||
945 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
946 | { | |
947 | uint16_t *v = pv; | |
948 | qemu_get_be16s(f, v); | |
949 | return 0; | |
950 | } | |
951 | ||
84e2e3eb | 952 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 953 | { |
84e2e3eb | 954 | uint16_t *v = pv; |
9ed7d6ae JQ |
955 | qemu_put_be16s(f, v); |
956 | } | |
957 | ||
958 | const VMStateInfo vmstate_info_uint16 = { | |
959 | .name = "uint16", | |
960 | .get = get_uint16, | |
961 | .put = put_uint16, | |
962 | }; | |
963 | ||
964 | /* 32 bit unsigned int */ | |
965 | ||
966 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
967 | { | |
968 | uint32_t *v = pv; | |
969 | qemu_get_be32s(f, v); | |
970 | return 0; | |
971 | } | |
972 | ||
84e2e3eb | 973 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 974 | { |
84e2e3eb | 975 | uint32_t *v = pv; |
9ed7d6ae JQ |
976 | qemu_put_be32s(f, v); |
977 | } | |
978 | ||
979 | const VMStateInfo vmstate_info_uint32 = { | |
980 | .name = "uint32", | |
981 | .get = get_uint32, | |
982 | .put = put_uint32, | |
983 | }; | |
984 | ||
9122a8fe JQ |
985 | /* 32 bit uint. See that the received value is the same than the one |
986 | in the field */ | |
987 | ||
988 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
989 | { | |
990 | uint32_t *v = pv; | |
991 | uint32_t v2; | |
992 | qemu_get_be32s(f, &v2); | |
993 | ||
994 | if (*v == v2) { | |
995 | return 0; | |
996 | } | |
997 | return -EINVAL; | |
998 | } | |
999 | ||
1000 | const VMStateInfo vmstate_info_uint32_equal = { | |
1001 | .name = "uint32 equal", | |
1002 | .get = get_uint32_equal, | |
1003 | .put = put_uint32, | |
1004 | }; | |
1005 | ||
9ed7d6ae JQ |
1006 | /* 64 bit unsigned int */ |
1007 | ||
1008 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1009 | { | |
1010 | uint64_t *v = pv; | |
1011 | qemu_get_be64s(f, v); | |
1012 | return 0; | |
1013 | } | |
1014 | ||
84e2e3eb | 1015 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1016 | { |
84e2e3eb | 1017 | uint64_t *v = pv; |
9ed7d6ae JQ |
1018 | qemu_put_be64s(f, v); |
1019 | } | |
1020 | ||
1021 | const VMStateInfo vmstate_info_uint64 = { | |
1022 | .name = "uint64", | |
1023 | .get = get_uint64, | |
1024 | .put = put_uint64, | |
1025 | }; | |
1026 | ||
80cd83e7 JQ |
1027 | /* 8 bit int. See that the received value is the same than the one |
1028 | in the field */ | |
1029 | ||
1030 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1031 | { | |
1032 | uint8_t *v = pv; | |
1033 | uint8_t v2; | |
1034 | qemu_get_8s(f, &v2); | |
1035 | ||
1036 | if (*v == v2) | |
1037 | return 0; | |
1038 | return -EINVAL; | |
1039 | } | |
1040 | ||
1041 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1042 | .name = "uint8 equal", |
80cd83e7 JQ |
1043 | .get = get_uint8_equal, |
1044 | .put = put_uint8, | |
1045 | }; | |
1046 | ||
dc3b83a0 JQ |
1047 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1048 | in the field */ | |
1049 | ||
1050 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1051 | { | |
1052 | uint16_t *v = pv; | |
1053 | uint16_t v2; | |
1054 | qemu_get_be16s(f, &v2); | |
1055 | ||
1056 | if (*v == v2) | |
1057 | return 0; | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | ||
1061 | const VMStateInfo vmstate_info_uint16_equal = { | |
1062 | .name = "uint16 equal", | |
1063 | .get = get_uint16_equal, | |
1064 | .put = put_uint16, | |
1065 | }; | |
1066 | ||
dde0463b JQ |
1067 | /* timers */ |
1068 | ||
1069 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1070 | { | |
1071 | QEMUTimer *v = pv; | |
1072 | qemu_get_timer(f, v); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
84e2e3eb | 1076 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1077 | { |
84e2e3eb | 1078 | QEMUTimer *v = pv; |
dde0463b JQ |
1079 | qemu_put_timer(f, v); |
1080 | } | |
1081 | ||
1082 | const VMStateInfo vmstate_info_timer = { | |
1083 | .name = "timer", | |
1084 | .get = get_timer, | |
1085 | .put = put_timer, | |
1086 | }; | |
1087 | ||
6f67c50f JQ |
1088 | /* uint8_t buffers */ |
1089 | ||
1090 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1091 | { | |
1092 | uint8_t *v = pv; | |
1093 | qemu_get_buffer(f, v, size); | |
1094 | return 0; | |
1095 | } | |
1096 | ||
84e2e3eb | 1097 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1098 | { |
84e2e3eb | 1099 | uint8_t *v = pv; |
6f67c50f JQ |
1100 | qemu_put_buffer(f, v, size); |
1101 | } | |
1102 | ||
1103 | const VMStateInfo vmstate_info_buffer = { | |
1104 | .name = "buffer", | |
1105 | .get = get_buffer, | |
1106 | .put = put_buffer, | |
1107 | }; | |
1108 | ||
76507c75 | 1109 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1110 | not useful anymore */ |
76507c75 JQ |
1111 | |
1112 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1113 | { | |
21174c34 JK |
1114 | uint8_t buf[1024]; |
1115 | int block_len; | |
1116 | ||
1117 | while (size > 0) { | |
1118 | block_len = MIN(sizeof(buf), size); | |
1119 | size -= block_len; | |
1120 | qemu_get_buffer(f, buf, block_len); | |
1121 | } | |
1122 | return 0; | |
76507c75 JQ |
1123 | } |
1124 | ||
1125 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1126 | { | |
21174c34 JK |
1127 | static const uint8_t buf[1024]; |
1128 | int block_len; | |
1129 | ||
1130 | while (size > 0) { | |
1131 | block_len = MIN(sizeof(buf), size); | |
1132 | size -= block_len; | |
1133 | qemu_put_buffer(f, buf, block_len); | |
1134 | } | |
76507c75 JQ |
1135 | } |
1136 | ||
1137 | const VMStateInfo vmstate_info_unused_buffer = { | |
1138 | .name = "unused_buffer", | |
1139 | .get = get_unused_buffer, | |
1140 | .put = put_unused_buffer, | |
1141 | }; | |
1142 | ||
08e99e29 PM |
1143 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1144 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1145 | * bit words with the bits in big endian order. The in-memory format | |
1146 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1147 | */ | |
1148 | /* This is the number of 64 bit words sent over the wire */ | |
1149 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1150 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1151 | { | |
1152 | unsigned long *bmp = pv; | |
1153 | int i, idx = 0; | |
1154 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1155 | uint64_t w = qemu_get_be64(f); | |
1156 | bmp[idx++] = w; | |
1157 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1158 | bmp[idx++] = w >> 32; | |
1159 | } | |
1160 | } | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1165 | { | |
1166 | unsigned long *bmp = pv; | |
1167 | int i, idx = 0; | |
1168 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1169 | uint64_t w = bmp[idx++]; | |
1170 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1171 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1172 | } | |
1173 | qemu_put_be64(f, w); | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | const VMStateInfo vmstate_info_bitmap = { | |
1178 | .name = "bitmap", | |
1179 | .get = get_bitmap, | |
1180 | .put = put_bitmap, | |
1181 | }; | |
1182 | ||
7685ee6a AW |
1183 | typedef struct CompatEntry { |
1184 | char idstr[256]; | |
1185 | int instance_id; | |
1186 | } CompatEntry; | |
1187 | ||
a672b469 | 1188 | typedef struct SaveStateEntry { |
72cf2d4f | 1189 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1190 | char idstr[256]; |
1191 | int instance_id; | |
4d2ffa08 | 1192 | int alias_id; |
a672b469 AL |
1193 | int version_id; |
1194 | int section_id; | |
22ea40f4 | 1195 | SaveVMHandlers *ops; |
9ed7d6ae | 1196 | const VMStateDescription *vmsd; |
a672b469 | 1197 | void *opaque; |
7685ee6a | 1198 | CompatEntry *compat; |
24312968 | 1199 | int no_migrate; |
a7ae8355 | 1200 | int is_ram; |
a672b469 AL |
1201 | } SaveStateEntry; |
1202 | ||
c163b5ca | 1203 | |
72cf2d4f BS |
1204 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1205 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1206 | static int global_section_id; |
a672b469 | 1207 | |
8718e999 JQ |
1208 | static int calculate_new_instance_id(const char *idstr) |
1209 | { | |
1210 | SaveStateEntry *se; | |
1211 | int instance_id = 0; | |
1212 | ||
72cf2d4f | 1213 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1214 | if (strcmp(idstr, se->idstr) == 0 |
1215 | && instance_id <= se->instance_id) { | |
1216 | instance_id = se->instance_id + 1; | |
1217 | } | |
1218 | } | |
1219 | return instance_id; | |
1220 | } | |
1221 | ||
7685ee6a AW |
1222 | static int calculate_compat_instance_id(const char *idstr) |
1223 | { | |
1224 | SaveStateEntry *se; | |
1225 | int instance_id = 0; | |
1226 | ||
1227 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1228 | if (!se->compat) | |
1229 | continue; | |
1230 | ||
1231 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1232 | && instance_id <= se->compat->instance_id) { | |
1233 | instance_id = se->compat->instance_id + 1; | |
1234 | } | |
1235 | } | |
1236 | return instance_id; | |
1237 | } | |
1238 | ||
a672b469 AL |
1239 | /* TODO: Individual devices generally have very little idea about the rest |
1240 | of the system, so instance_id should be removed/replaced. | |
1241 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1242 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1243 | int register_savevm_live(DeviceState *dev, |
1244 | const char *idstr, | |
a672b469 AL |
1245 | int instance_id, |
1246 | int version_id, | |
7908c78d | 1247 | SaveVMHandlers *ops, |
a672b469 AL |
1248 | void *opaque) |
1249 | { | |
8718e999 | 1250 | SaveStateEntry *se; |
a672b469 | 1251 | |
7267c094 | 1252 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1253 | se->version_id = version_id; |
1254 | se->section_id = global_section_id++; | |
7908c78d | 1255 | se->ops = ops; |
a672b469 | 1256 | se->opaque = opaque; |
9ed7d6ae | 1257 | se->vmsd = NULL; |
24312968 | 1258 | se->no_migrate = 0; |
a7ae8355 | 1259 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1260 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1261 | se->is_ram = 1; |
1262 | } | |
a672b469 | 1263 | |
09e5ab63 AL |
1264 | if (dev) { |
1265 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1266 | if (id) { |
1267 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1268 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1269 | g_free(id); |
7685ee6a | 1270 | |
7267c094 | 1271 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1272 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1273 | se->compat->instance_id = instance_id == -1 ? | |
1274 | calculate_compat_instance_id(idstr) : instance_id; | |
1275 | instance_id = -1; | |
1276 | } | |
1277 | } | |
1278 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1279 | ||
8718e999 | 1280 | if (instance_id == -1) { |
7685ee6a | 1281 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1282 | } else { |
1283 | se->instance_id = instance_id; | |
a672b469 | 1284 | } |
7685ee6a | 1285 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1286 | /* add at the end of list */ |
72cf2d4f | 1287 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1288 | return 0; |
1289 | } | |
1290 | ||
0be71e32 AW |
1291 | int register_savevm(DeviceState *dev, |
1292 | const char *idstr, | |
a672b469 AL |
1293 | int instance_id, |
1294 | int version_id, | |
1295 | SaveStateHandler *save_state, | |
1296 | LoadStateHandler *load_state, | |
1297 | void *opaque) | |
1298 | { | |
7908c78d JQ |
1299 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1300 | ops->save_state = save_state; | |
1301 | ops->load_state = load_state; | |
0be71e32 | 1302 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1303 | ops, opaque); |
a672b469 AL |
1304 | } |
1305 | ||
0be71e32 | 1306 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1307 | { |
8718e999 | 1308 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1309 | char id[256] = ""; |
1310 | ||
09e5ab63 AL |
1311 | if (dev) { |
1312 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1313 | if (path) { |
1314 | pstrcpy(id, sizeof(id), path); | |
1315 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1316 | g_free(path); |
7685ee6a AW |
1317 | } |
1318 | } | |
1319 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1320 | |
72cf2d4f | 1321 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1322 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1323 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1324 | if (se->compat) { |
7267c094 | 1325 | g_free(se->compat); |
69e58af9 | 1326 | } |
22ea40f4 | 1327 | g_free(se->ops); |
7267c094 | 1328 | g_free(se); |
41bd13af | 1329 | } |
41bd13af AL |
1330 | } |
1331 | } | |
1332 | ||
0be71e32 | 1333 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1334 | const VMStateDescription *vmsd, |
1335 | void *opaque, int alias_id, | |
1336 | int required_for_version) | |
9ed7d6ae | 1337 | { |
8718e999 | 1338 | SaveStateEntry *se; |
9ed7d6ae | 1339 | |
4d2ffa08 JK |
1340 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1341 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1342 | ||
7267c094 | 1343 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1344 | se->version_id = vmsd->version_id; |
1345 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1346 | se->opaque = opaque; |
1347 | se->vmsd = vmsd; | |
4d2ffa08 | 1348 | se->alias_id = alias_id; |
2837c8ea | 1349 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1350 | |
09e5ab63 AL |
1351 | if (dev) { |
1352 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1353 | if (id) { |
1354 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1355 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1356 | g_free(id); |
7685ee6a | 1357 | |
7267c094 | 1358 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1359 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1360 | se->compat->instance_id = instance_id == -1 ? | |
1361 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1362 | instance_id = -1; | |
1363 | } | |
1364 | } | |
1365 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1366 | ||
8718e999 | 1367 | if (instance_id == -1) { |
7685ee6a | 1368 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1369 | } else { |
1370 | se->instance_id = instance_id; | |
9ed7d6ae | 1371 | } |
7685ee6a | 1372 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1373 | /* add at the end of list */ |
72cf2d4f | 1374 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1375 | return 0; |
1376 | } | |
1377 | ||
0be71e32 AW |
1378 | int vmstate_register(DeviceState *dev, int instance_id, |
1379 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1380 | { |
0be71e32 AW |
1381 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1382 | opaque, -1, 0); | |
4d2ffa08 JK |
1383 | } |
1384 | ||
0be71e32 AW |
1385 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1386 | void *opaque) | |
9ed7d6ae | 1387 | { |
1eb7538b JQ |
1388 | SaveStateEntry *se, *new_se; |
1389 | ||
72cf2d4f | 1390 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1391 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1392 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1393 | if (se->compat) { |
7267c094 | 1394 | g_free(se->compat); |
69e58af9 | 1395 | } |
7267c094 | 1396 | g_free(se); |
1eb7538b JQ |
1397 | } |
1398 | } | |
9ed7d6ae JQ |
1399 | } |
1400 | ||
811814bd JQ |
1401 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1402 | void *opaque); | |
1403 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1404 | void *opaque); | |
1405 | ||
9ed7d6ae JQ |
1406 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1407 | void *opaque, int version_id) | |
1408 | { | |
1409 | VMStateField *field = vmsd->fields; | |
811814bd | 1410 | int ret; |
9ed7d6ae JQ |
1411 | |
1412 | if (version_id > vmsd->version_id) { | |
1413 | return -EINVAL; | |
1414 | } | |
1415 | if (version_id < vmsd->minimum_version_id_old) { | |
1416 | return -EINVAL; | |
1417 | } | |
1418 | if (version_id < vmsd->minimum_version_id) { | |
1419 | return vmsd->load_state_old(f, opaque, version_id); | |
1420 | } | |
fd4d52de JQ |
1421 | if (vmsd->pre_load) { |
1422 | int ret = vmsd->pre_load(opaque); | |
1423 | if (ret) | |
1424 | return ret; | |
1425 | } | |
9ed7d6ae | 1426 | while(field->name) { |
f11f6a5f JQ |
1427 | if ((field->field_exists && |
1428 | field->field_exists(opaque, version_id)) || | |
1429 | (!field->field_exists && | |
1430 | field->version_id <= version_id)) { | |
f752a6aa | 1431 | void *base_addr = opaque + field->offset; |
811814bd | 1432 | int i, n_elems = 1; |
e61a1e0a | 1433 | int size = field->size; |
9ed7d6ae | 1434 | |
e61a1e0a JQ |
1435 | if (field->flags & VMS_VBUFFER) { |
1436 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1437 | if (field->flags & VMS_MULTIPLY) { |
1438 | size *= field->size; | |
1439 | } | |
e61a1e0a | 1440 | } |
f752a6aa JQ |
1441 | if (field->flags & VMS_ARRAY) { |
1442 | n_elems = field->num; | |
d6698281 JQ |
1443 | } else if (field->flags & VMS_VARRAY_INT32) { |
1444 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1445 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1446 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1447 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1448 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1449 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1450 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1451 | } |
dde0463b | 1452 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1453 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1454 | } |
f752a6aa | 1455 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1456 | void *addr = base_addr + size * i; |
ec245e21 | 1457 | |
19df438b JQ |
1458 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1459 | addr = *(void **)addr; | |
1460 | } | |
ec245e21 | 1461 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1462 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1463 | } else { |
e61a1e0a | 1464 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1465 | |
1466 | } | |
f752a6aa JQ |
1467 | if (ret < 0) { |
1468 | return ret; | |
1469 | } | |
9ed7d6ae JQ |
1470 | } |
1471 | } | |
1472 | field++; | |
1473 | } | |
811814bd JQ |
1474 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1475 | if (ret != 0) { | |
1476 | return ret; | |
1477 | } | |
752ff2fa | 1478 | if (vmsd->post_load) { |
e59fb374 | 1479 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1480 | } |
9ed7d6ae JQ |
1481 | return 0; |
1482 | } | |
1483 | ||
1484 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1485 | void *opaque) |
9ed7d6ae JQ |
1486 | { |
1487 | VMStateField *field = vmsd->fields; | |
1488 | ||
8fb0791d JQ |
1489 | if (vmsd->pre_save) { |
1490 | vmsd->pre_save(opaque); | |
1491 | } | |
9ed7d6ae | 1492 | while(field->name) { |
f11f6a5f JQ |
1493 | if (!field->field_exists || |
1494 | field->field_exists(opaque, vmsd->version_id)) { | |
1495 | void *base_addr = opaque + field->offset; | |
1496 | int i, n_elems = 1; | |
e61a1e0a | 1497 | int size = field->size; |
dde0463b | 1498 | |
e61a1e0a JQ |
1499 | if (field->flags & VMS_VBUFFER) { |
1500 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1501 | if (field->flags & VMS_MULTIPLY) { |
1502 | size *= field->size; | |
1503 | } | |
e61a1e0a | 1504 | } |
f11f6a5f JQ |
1505 | if (field->flags & VMS_ARRAY) { |
1506 | n_elems = field->num; | |
d6698281 JQ |
1507 | } else if (field->flags & VMS_VARRAY_INT32) { |
1508 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1509 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1510 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1511 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1512 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1513 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1514 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1515 | } |
1516 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1517 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1518 | } |
1519 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1520 | void *addr = base_addr + size * i; |
ec245e21 | 1521 | |
8595387e JQ |
1522 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1523 | addr = *(void **)addr; | |
1524 | } | |
f11f6a5f JQ |
1525 | if (field->flags & VMS_STRUCT) { |
1526 | vmstate_save_state(f, field->vmsd, addr); | |
1527 | } else { | |
e61a1e0a | 1528 | field->info->put(f, addr, size); |
f11f6a5f | 1529 | } |
ec245e21 | 1530 | } |
dde0463b | 1531 | } |
9ed7d6ae JQ |
1532 | field++; |
1533 | } | |
811814bd | 1534 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1535 | } |
1536 | ||
4082be4d JQ |
1537 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1538 | { | |
9ed7d6ae | 1539 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1540 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1541 | } |
1542 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1543 | } |
1544 | ||
dc912121 | 1545 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1546 | { |
9ed7d6ae | 1547 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1548 | se->ops->save_state(f, se->opaque); |
dc912121 | 1549 | return; |
9ed7d6ae JQ |
1550 | } |
1551 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1552 | } |
1553 | ||
a672b469 AL |
1554 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1555 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1556 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1557 | ||
1558 | #define QEMU_VM_EOF 0x00 | |
1559 | #define QEMU_VM_SECTION_START 0x01 | |
1560 | #define QEMU_VM_SECTION_PART 0x02 | |
1561 | #define QEMU_VM_SECTION_END 0x03 | |
1562 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1563 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1564 | |
e1c37d0e | 1565 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1566 | { |
1567 | SaveStateEntry *se; | |
1568 | ||
1569 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1570 | if (se->no_migrate) { | |
e1c37d0e | 1571 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1572 | return true; |
1573 | } | |
1574 | } | |
1575 | return false; | |
1576 | } | |
1577 | ||
6607ae23 IY |
1578 | int qemu_savevm_state_begin(QEMUFile *f, |
1579 | const MigrationParams *params) | |
a672b469 AL |
1580 | { |
1581 | SaveStateEntry *se; | |
39346385 | 1582 | int ret; |
a672b469 | 1583 | |
c163b5ca | 1584 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1585 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1586 | continue; |
6607ae23 | 1587 | } |
22ea40f4 | 1588 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1589 | } |
1590 | ||
a672b469 AL |
1591 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1592 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1593 | ||
72cf2d4f | 1594 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1595 | int len; |
1596 | ||
d1315aac | 1597 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1598 | continue; |
22ea40f4 | 1599 | } |
6bd68781 JQ |
1600 | if (se->ops && se->ops->is_active) { |
1601 | if (!se->ops->is_active(se->opaque)) { | |
1602 | continue; | |
1603 | } | |
1604 | } | |
a672b469 AL |
1605 | /* Section type */ |
1606 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1607 | qemu_put_be32(f, se->section_id); | |
1608 | ||
1609 | /* ID string */ | |
1610 | len = strlen(se->idstr); | |
1611 | qemu_put_byte(f, len); | |
1612 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1613 | ||
1614 | qemu_put_be32(f, se->instance_id); | |
1615 | qemu_put_be32(f, se->version_id); | |
1616 | ||
d1315aac | 1617 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1618 | if (ret < 0) { |
6522773f | 1619 | qemu_savevm_state_cancel(); |
2975725f JQ |
1620 | return ret; |
1621 | } | |
a672b469 | 1622 | } |
624b9cc2 | 1623 | ret = qemu_file_get_error(f); |
39346385 | 1624 | if (ret != 0) { |
6522773f | 1625 | qemu_savevm_state_cancel(); |
4ec7fcc7 | 1626 | } |
a672b469 | 1627 | |
39346385 JQ |
1628 | return ret; |
1629 | ||
a672b469 AL |
1630 | } |
1631 | ||
39346385 | 1632 | /* |
07f35073 | 1633 | * this function has three return values: |
39346385 JQ |
1634 | * negative: there was one error, and we have -errno. |
1635 | * 0 : We haven't finished, caller have to go again | |
1636 | * 1 : We have finished, we can go to complete phase | |
1637 | */ | |
539de124 | 1638 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1639 | { |
1640 | SaveStateEntry *se; | |
1641 | int ret = 1; | |
1642 | ||
72cf2d4f | 1643 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1644 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1645 | continue; |
22ea40f4 | 1646 | } |
6bd68781 JQ |
1647 | if (se->ops && se->ops->is_active) { |
1648 | if (!se->ops->is_active(se->opaque)) { | |
1649 | continue; | |
1650 | } | |
1651 | } | |
aac844ed JQ |
1652 | if (qemu_file_rate_limit(f)) { |
1653 | return 0; | |
1654 | } | |
517a13c9 | 1655 | trace_savevm_section_start(); |
a672b469 AL |
1656 | /* Section type */ |
1657 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1658 | qemu_put_be32(f, se->section_id); | |
1659 | ||
16310a3c | 1660 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1661 | trace_savevm_section_end(se->section_id); |
1662 | ||
2975725f | 1663 | if (ret <= 0) { |
90697be8 JK |
1664 | /* Do not proceed to the next vmstate before this one reported |
1665 | completion of the current stage. This serializes the migration | |
1666 | and reduces the probability that a faster changing state is | |
1667 | synchronized over and over again. */ | |
1668 | break; | |
1669 | } | |
a672b469 | 1670 | } |
39346385 JQ |
1671 | if (ret != 0) { |
1672 | return ret; | |
1673 | } | |
624b9cc2 | 1674 | ret = qemu_file_get_error(f); |
39346385 | 1675 | if (ret != 0) { |
6522773f | 1676 | qemu_savevm_state_cancel(); |
4ec7fcc7 | 1677 | } |
39346385 | 1678 | return ret; |
a672b469 AL |
1679 | } |
1680 | ||
539de124 | 1681 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1682 | { |
1683 | SaveStateEntry *se; | |
2975725f | 1684 | int ret; |
a672b469 | 1685 | |
ea375f9a JK |
1686 | cpu_synchronize_all_states(); |
1687 | ||
72cf2d4f | 1688 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1689 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1690 | continue; |
22ea40f4 | 1691 | } |
6bd68781 JQ |
1692 | if (se->ops && se->ops->is_active) { |
1693 | if (!se->ops->is_active(se->opaque)) { | |
1694 | continue; | |
1695 | } | |
1696 | } | |
517a13c9 | 1697 | trace_savevm_section_start(); |
a672b469 AL |
1698 | /* Section type */ |
1699 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1700 | qemu_put_be32(f, se->section_id); | |
1701 | ||
16310a3c | 1702 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1703 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1704 | if (ret < 0) { |
1705 | return ret; | |
1706 | } | |
a672b469 AL |
1707 | } |
1708 | ||
72cf2d4f | 1709 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1710 | int len; |
1711 | ||
22ea40f4 | 1712 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1713 | continue; |
22ea40f4 | 1714 | } |
517a13c9 | 1715 | trace_savevm_section_start(); |
a672b469 AL |
1716 | /* Section type */ |
1717 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1718 | qemu_put_be32(f, se->section_id); | |
1719 | ||
1720 | /* ID string */ | |
1721 | len = strlen(se->idstr); | |
1722 | qemu_put_byte(f, len); | |
1723 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1724 | ||
1725 | qemu_put_be32(f, se->instance_id); | |
1726 | qemu_put_be32(f, se->version_id); | |
1727 | ||
dc912121 | 1728 | vmstate_save(f, se); |
517a13c9 | 1729 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1730 | } |
1731 | ||
1732 | qemu_put_byte(f, QEMU_VM_EOF); | |
1733 | ||
624b9cc2 | 1734 | return qemu_file_get_error(f); |
a672b469 AL |
1735 | } |
1736 | ||
e4ed1541 JQ |
1737 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1738 | { | |
1739 | SaveStateEntry *se; | |
1740 | uint64_t ret = 0; | |
1741 | ||
1742 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1743 | if (!se->ops || !se->ops->save_live_pending) { | |
1744 | continue; | |
1745 | } | |
1746 | if (se->ops && se->ops->is_active) { | |
1747 | if (!se->ops->is_active(se->opaque)) { | |
1748 | continue; | |
1749 | } | |
1750 | } | |
1751 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1752 | } | |
1753 | return ret; | |
1754 | } | |
1755 | ||
6522773f | 1756 | void qemu_savevm_state_cancel(void) |
4ec7fcc7 JK |
1757 | { |
1758 | SaveStateEntry *se; | |
1759 | ||
1760 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1761 | if (se->ops && se->ops->cancel) { |
1762 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1763 | } |
1764 | } | |
1765 | } | |
1766 | ||
e1c37d0e | 1767 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1768 | { |
a672b469 | 1769 | int ret; |
6607ae23 IY |
1770 | MigrationParams params = { |
1771 | .blk = 0, | |
1772 | .shared = 0 | |
1773 | }; | |
a672b469 | 1774 | |
e1c37d0e | 1775 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1776 | ret = -EINVAL; |
1777 | goto out; | |
1778 | } | |
1779 | ||
6607ae23 | 1780 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1781 | if (ret < 0) |
1782 | goto out; | |
1783 | ||
1784 | do { | |
539de124 | 1785 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1786 | if (ret < 0) |
1787 | goto out; | |
1788 | } while (ret == 0); | |
1789 | ||
539de124 | 1790 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1791 | |
1792 | out: | |
39346385 | 1793 | if (ret == 0) { |
624b9cc2 | 1794 | ret = qemu_file_get_error(f); |
39346385 | 1795 | } |
a672b469 | 1796 | |
a672b469 AL |
1797 | return ret; |
1798 | } | |
1799 | ||
a7ae8355 SS |
1800 | static int qemu_save_device_state(QEMUFile *f) |
1801 | { | |
1802 | SaveStateEntry *se; | |
1803 | ||
1804 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1805 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1806 | ||
1807 | cpu_synchronize_all_states(); | |
1808 | ||
1809 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1810 | int len; | |
1811 | ||
1812 | if (se->is_ram) { | |
1813 | continue; | |
1814 | } | |
22ea40f4 | 1815 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1816 | continue; |
1817 | } | |
1818 | ||
1819 | /* Section type */ | |
1820 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1821 | qemu_put_be32(f, se->section_id); | |
1822 | ||
1823 | /* ID string */ | |
1824 | len = strlen(se->idstr); | |
1825 | qemu_put_byte(f, len); | |
1826 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1827 | ||
1828 | qemu_put_be32(f, se->instance_id); | |
1829 | qemu_put_be32(f, se->version_id); | |
1830 | ||
1831 | vmstate_save(f, se); | |
1832 | } | |
1833 | ||
1834 | qemu_put_byte(f, QEMU_VM_EOF); | |
1835 | ||
1836 | return qemu_file_get_error(f); | |
1837 | } | |
1838 | ||
a672b469 AL |
1839 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1840 | { | |
1841 | SaveStateEntry *se; | |
1842 | ||
72cf2d4f | 1843 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1844 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1845 | (instance_id == se->instance_id || |
1846 | instance_id == se->alias_id)) | |
a672b469 | 1847 | return se; |
7685ee6a AW |
1848 | /* Migrating from an older version? */ |
1849 | if (strstr(se->idstr, idstr) && se->compat) { | |
1850 | if (!strcmp(se->compat->idstr, idstr) && | |
1851 | (instance_id == se->compat->instance_id || | |
1852 | instance_id == se->alias_id)) | |
1853 | return se; | |
1854 | } | |
a672b469 AL |
1855 | } |
1856 | return NULL; | |
1857 | } | |
1858 | ||
811814bd JQ |
1859 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1860 | { | |
1861 | while(sub && sub->needed) { | |
1862 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1863 | return sub->vmsd; | |
1864 | } | |
1865 | sub++; | |
1866 | } | |
1867 | return NULL; | |
1868 | } | |
1869 | ||
1870 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1871 | void *opaque) | |
1872 | { | |
c6380724 | 1873 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1874 | char idstr[256]; |
1875 | int ret; | |
c6380724 | 1876 | uint8_t version_id, len, size; |
811814bd JQ |
1877 | const VMStateDescription *sub_vmsd; |
1878 | ||
c6380724 JQ |
1879 | len = qemu_peek_byte(f, 1); |
1880 | if (len < strlen(vmsd->name) + 1) { | |
1881 | /* subsection name has be be "section_name/a" */ | |
1882 | return 0; | |
1883 | } | |
1884 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1885 | if (size != len) { | |
1886 | return 0; | |
1887 | } | |
1888 | idstr[size] = 0; | |
811814bd | 1889 | |
c6380724 JQ |
1890 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1891 | /* it don't have a valid subsection name */ | |
1892 | return 0; | |
1893 | } | |
3da9eebd | 1894 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1895 | if (sub_vmsd == NULL) { |
1896 | return -ENOENT; | |
1897 | } | |
c6380724 JQ |
1898 | qemu_file_skip(f, 1); /* subsection */ |
1899 | qemu_file_skip(f, 1); /* len */ | |
1900 | qemu_file_skip(f, len); /* idstr */ | |
1901 | version_id = qemu_get_be32(f); | |
1902 | ||
811814bd JQ |
1903 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1904 | if (ret) { | |
1905 | return ret; | |
1906 | } | |
1907 | } | |
1908 | return 0; | |
1909 | } | |
1910 | ||
1911 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1912 | void *opaque) | |
1913 | { | |
1914 | const VMStateSubsection *sub = vmsd->subsections; | |
1915 | ||
1916 | while (sub && sub->needed) { | |
1917 | if (sub->needed(opaque)) { | |
1918 | const VMStateDescription *vmsd = sub->vmsd; | |
1919 | uint8_t len; | |
1920 | ||
1921 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1922 | len = strlen(vmsd->name); | |
1923 | qemu_put_byte(f, len); | |
1924 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1925 | qemu_put_be32(f, vmsd->version_id); | |
1926 | vmstate_save_state(f, vmsd, opaque); | |
1927 | } | |
1928 | sub++; | |
1929 | } | |
1930 | } | |
1931 | ||
a672b469 | 1932 | typedef struct LoadStateEntry { |
72cf2d4f | 1933 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1934 | SaveStateEntry *se; |
1935 | int section_id; | |
1936 | int version_id; | |
a672b469 AL |
1937 | } LoadStateEntry; |
1938 | ||
a672b469 AL |
1939 | int qemu_loadvm_state(QEMUFile *f) |
1940 | { | |
72cf2d4f BS |
1941 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1942 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1943 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1944 | uint8_t section_type; |
1945 | unsigned int v; | |
1946 | int ret; | |
1947 | ||
e1c37d0e | 1948 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1949 | return -EINVAL; |
1950 | } | |
1951 | ||
a672b469 AL |
1952 | v = qemu_get_be32(f); |
1953 | if (v != QEMU_VM_FILE_MAGIC) | |
1954 | return -EINVAL; | |
1955 | ||
1956 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1957 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1958 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1959 | return -ENOTSUP; | |
1960 | } | |
a672b469 AL |
1961 | if (v != QEMU_VM_FILE_VERSION) |
1962 | return -ENOTSUP; | |
1963 | ||
1964 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1965 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1966 | SaveStateEntry *se; |
1967 | char idstr[257]; | |
1968 | int len; | |
1969 | ||
1970 | switch (section_type) { | |
1971 | case QEMU_VM_SECTION_START: | |
1972 | case QEMU_VM_SECTION_FULL: | |
1973 | /* Read section start */ | |
1974 | section_id = qemu_get_be32(f); | |
1975 | len = qemu_get_byte(f); | |
1976 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1977 | idstr[len] = 0; | |
1978 | instance_id = qemu_get_be32(f); | |
1979 | version_id = qemu_get_be32(f); | |
1980 | ||
1981 | /* Find savevm section */ | |
1982 | se = find_se(idstr, instance_id); | |
1983 | if (se == NULL) { | |
1984 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1985 | ret = -EINVAL; | |
1986 | goto out; | |
1987 | } | |
1988 | ||
1989 | /* Validate version */ | |
1990 | if (version_id > se->version_id) { | |
1991 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1992 | version_id, idstr, se->version_id); | |
1993 | ret = -EINVAL; | |
1994 | goto out; | |
1995 | } | |
1996 | ||
1997 | /* Add entry */ | |
7267c094 | 1998 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1999 | |
2000 | le->se = se; | |
2001 | le->section_id = section_id; | |
2002 | le->version_id = version_id; | |
72cf2d4f | 2003 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2004 | |
4082be4d | 2005 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2006 | if (ret < 0) { |
2007 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2008 | instance_id, idstr); | |
2009 | goto out; | |
2010 | } | |
a672b469 AL |
2011 | break; |
2012 | case QEMU_VM_SECTION_PART: | |
2013 | case QEMU_VM_SECTION_END: | |
2014 | section_id = qemu_get_be32(f); | |
2015 | ||
72cf2d4f | 2016 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2017 | if (le->section_id == section_id) { |
2018 | break; | |
2019 | } | |
2020 | } | |
a672b469 AL |
2021 | if (le == NULL) { |
2022 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2023 | ret = -EINVAL; | |
2024 | goto out; | |
2025 | } | |
2026 | ||
4082be4d | 2027 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2028 | if (ret < 0) { |
2029 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2030 | section_id); | |
2031 | goto out; | |
2032 | } | |
a672b469 AL |
2033 | break; |
2034 | default: | |
2035 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2036 | ret = -EINVAL; | |
2037 | goto out; | |
2038 | } | |
2039 | } | |
2040 | ||
ea375f9a JK |
2041 | cpu_synchronize_all_post_init(); |
2042 | ||
a672b469 AL |
2043 | ret = 0; |
2044 | ||
2045 | out: | |
72cf2d4f BS |
2046 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2047 | QLIST_REMOVE(le, entry); | |
7267c094 | 2048 | g_free(le); |
a672b469 AL |
2049 | } |
2050 | ||
42802d47 JQ |
2051 | if (ret == 0) { |
2052 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2053 | } |
a672b469 AL |
2054 | |
2055 | return ret; | |
2056 | } | |
2057 | ||
a672b469 AL |
2058 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2059 | const char *name) | |
2060 | { | |
2061 | QEMUSnapshotInfo *sn_tab, *sn; | |
2062 | int nb_sns, i, ret; | |
2063 | ||
2064 | ret = -ENOENT; | |
2065 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2066 | if (nb_sns < 0) | |
2067 | return ret; | |
2068 | for(i = 0; i < nb_sns; i++) { | |
2069 | sn = &sn_tab[i]; | |
2070 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2071 | *sn_info = *sn; | |
2072 | ret = 0; | |
2073 | break; | |
2074 | } | |
2075 | } | |
7267c094 | 2076 | g_free(sn_tab); |
a672b469 AL |
2077 | return ret; |
2078 | } | |
2079 | ||
cb499fb2 KW |
2080 | /* |
2081 | * Deletes snapshots of a given name in all opened images. | |
2082 | */ | |
2083 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2084 | { | |
2085 | BlockDriverState *bs; | |
cb499fb2 KW |
2086 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2087 | int ret; | |
2088 | ||
dbc13590 MA |
2089 | bs = NULL; |
2090 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2091 | if (bdrv_can_snapshot(bs) && |
2092 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2093 | { | |
2094 | ret = bdrv_snapshot_delete(bs, name); | |
2095 | if (ret < 0) { | |
2096 | monitor_printf(mon, | |
2097 | "Error while deleting snapshot on '%s'\n", | |
2098 | bdrv_get_device_name(bs)); | |
2099 | return -1; | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | return 0; | |
2105 | } | |
2106 | ||
d54908a5 | 2107 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2108 | { |
2109 | BlockDriverState *bs, *bs1; | |
2110 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2111 | int ret; |
a672b469 AL |
2112 | QEMUFile *f; |
2113 | int saved_vm_running; | |
c2c9a466 | 2114 | uint64_t vm_state_size; |
68b891ec | 2115 | qemu_timeval tv; |
7d631a11 | 2116 | struct tm tm; |
d54908a5 | 2117 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2118 | |
feeee5ac | 2119 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2120 | bs = NULL; |
2121 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2122 | |
07b70bfb | 2123 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2124 | continue; |
2125 | } | |
2126 | ||
2127 | if (!bdrv_can_snapshot(bs)) { | |
2128 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2129 | bdrv_get_device_name(bs)); | |
2130 | return; | |
2131 | } | |
2132 | } | |
2133 | ||
f9092b10 | 2134 | bs = bdrv_snapshots(); |
a672b469 | 2135 | if (!bs) { |
376253ec | 2136 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2137 | return; |
2138 | } | |
a672b469 | 2139 | |
1354869c | 2140 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2141 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2142 | |
cb499fb2 | 2143 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2144 | |
2145 | /* fill auxiliary fields */ | |
68b891ec | 2146 | qemu_gettimeofday(&tv); |
a672b469 AL |
2147 | sn->date_sec = tv.tv_sec; |
2148 | sn->date_nsec = tv.tv_usec * 1000; | |
74475455 | 2149 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2150 | |
7d631a11 MDCF |
2151 | if (name) { |
2152 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2153 | if (ret >= 0) { | |
2154 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2155 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2156 | } else { | |
2157 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2158 | } | |
2159 | } else { | |
d7d9b528 BS |
2160 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2161 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 | 2162 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
7d631a11 MDCF |
2163 | } |
2164 | ||
cb499fb2 | 2165 | /* Delete old snapshots of the same name */ |
f139a412 | 2166 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2167 | goto the_end; |
2168 | } | |
2169 | ||
a672b469 | 2170 | /* save the VM state */ |
45566e9c | 2171 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2172 | if (!f) { |
376253ec | 2173 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2174 | goto the_end; |
2175 | } | |
e1c37d0e | 2176 | ret = qemu_savevm_state(f); |
2d22b18f | 2177 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2178 | qemu_fclose(f); |
2179 | if (ret < 0) { | |
376253ec | 2180 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2181 | goto the_end; |
2182 | } | |
2183 | ||
2184 | /* create the snapshots */ | |
2185 | ||
dbc13590 MA |
2186 | bs1 = NULL; |
2187 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2188 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2189 | /* Write VM state size only to the image that contains the state */ |
2190 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2191 | ret = bdrv_snapshot_create(bs1, sn); |
2192 | if (ret < 0) { | |
376253ec AL |
2193 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2194 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2195 | } |
2196 | } | |
2197 | } | |
2198 | ||
2199 | the_end: | |
2200 | if (saved_vm_running) | |
2201 | vm_start(); | |
2202 | } | |
2203 | ||
a7ae8355 SS |
2204 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2205 | { | |
2206 | QEMUFile *f; | |
2207 | int saved_vm_running; | |
2208 | int ret; | |
2209 | ||
2210 | saved_vm_running = runstate_is_running(); | |
2211 | vm_stop(RUN_STATE_SAVE_VM); | |
2212 | ||
2213 | f = qemu_fopen(filename, "wb"); | |
2214 | if (!f) { | |
2215 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2216 | goto the_end; | |
2217 | } | |
2218 | ret = qemu_save_device_state(f); | |
2219 | qemu_fclose(f); | |
2220 | if (ret < 0) { | |
2221 | error_set(errp, QERR_IO_ERROR); | |
2222 | } | |
2223 | ||
2224 | the_end: | |
2225 | if (saved_vm_running) | |
2226 | vm_start(); | |
a7ae8355 SS |
2227 | } |
2228 | ||
03cd4655 | 2229 | int load_vmstate(const char *name) |
a672b469 | 2230 | { |
f0aa7a8b | 2231 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2232 | QEMUSnapshotInfo sn; |
a672b469 | 2233 | QEMUFile *f; |
751c6a17 | 2234 | int ret; |
a672b469 | 2235 | |
f0aa7a8b MDCF |
2236 | bs_vm_state = bdrv_snapshots(); |
2237 | if (!bs_vm_state) { | |
2238 | error_report("No block device supports snapshots"); | |
2239 | return -ENOTSUP; | |
2240 | } | |
2241 | ||
2242 | /* Don't even try to load empty VM states */ | |
2243 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2244 | if (ret < 0) { | |
2245 | return ret; | |
2246 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2247 | error_report("This is a disk-only snapshot. Revert to it offline " |
2248 | "using qemu-img."); | |
f0aa7a8b MDCF |
2249 | return -EINVAL; |
2250 | } | |
2251 | ||
2252 | /* Verify if there is any device that doesn't support snapshots and is | |
2253 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2254 | bs = NULL; |
2255 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2256 | |
07b70bfb | 2257 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2258 | continue; |
2259 | } | |
2260 | ||
2261 | if (!bdrv_can_snapshot(bs)) { | |
2262 | error_report("Device '%s' is writable but does not support snapshots.", | |
2263 | bdrv_get_device_name(bs)); | |
2264 | return -ENOTSUP; | |
2265 | } | |
feeee5ac | 2266 | |
f0aa7a8b MDCF |
2267 | ret = bdrv_snapshot_find(bs, &sn, name); |
2268 | if (ret < 0) { | |
2269 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2270 | bdrv_get_device_name(bs), name); | |
2271 | return ret; | |
2272 | } | |
a672b469 AL |
2273 | } |
2274 | ||
2275 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2276 | bdrv_drain_all(); |
a672b469 | 2277 | |
f0aa7a8b MDCF |
2278 | bs = NULL; |
2279 | while ((bs = bdrv_next(bs))) { | |
2280 | if (bdrv_can_snapshot(bs)) { | |
2281 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2282 | if (ret < 0) { |
f0aa7a8b MDCF |
2283 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2284 | ret, name, bdrv_get_device_name(bs)); | |
2285 | return ret; | |
a672b469 AL |
2286 | } |
2287 | } | |
2288 | } | |
2289 | ||
a672b469 | 2290 | /* restore the VM state */ |
f0aa7a8b | 2291 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2292 | if (!f) { |
1ecda02b | 2293 | error_report("Could not open VM state file"); |
05f2401e | 2294 | return -EINVAL; |
a672b469 | 2295 | } |
f0aa7a8b | 2296 | |
5a8a49d7 | 2297 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2298 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2299 | |
a672b469 AL |
2300 | qemu_fclose(f); |
2301 | if (ret < 0) { | |
1ecda02b | 2302 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2303 | return ret; |
a672b469 | 2304 | } |
f0aa7a8b | 2305 | |
05f2401e | 2306 | return 0; |
7b630349 JQ |
2307 | } |
2308 | ||
d54908a5 | 2309 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2310 | { |
2311 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2312 | int ret; |
d54908a5 | 2313 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2314 | |
f9092b10 | 2315 | bs = bdrv_snapshots(); |
a672b469 | 2316 | if (!bs) { |
376253ec | 2317 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2318 | return; |
2319 | } | |
2320 | ||
dbc13590 MA |
2321 | bs1 = NULL; |
2322 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2323 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2324 | ret = bdrv_snapshot_delete(bs1, name); |
2325 | if (ret < 0) { | |
2326 | if (ret == -ENOTSUP) | |
376253ec AL |
2327 | monitor_printf(mon, |
2328 | "Snapshots not supported on device '%s'\n", | |
2329 | bdrv_get_device_name(bs1)); | |
a672b469 | 2330 | else |
376253ec AL |
2331 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2332 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2333 | } |
2334 | } | |
2335 | } | |
2336 | } | |
2337 | ||
84f2d0ea | 2338 | void do_info_snapshots(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2339 | { |
2340 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2341 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2342 | int nb_sns, i, ret, available; | |
2343 | int total; | |
2344 | int *available_snapshots; | |
a672b469 AL |
2345 | char buf[256]; |
2346 | ||
f9092b10 | 2347 | bs = bdrv_snapshots(); |
a672b469 | 2348 | if (!bs) { |
376253ec | 2349 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2350 | return; |
2351 | } | |
a672b469 AL |
2352 | |
2353 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2354 | if (nb_sns < 0) { | |
376253ec | 2355 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2356 | return; |
2357 | } | |
f9209915 MDCF |
2358 | |
2359 | if (nb_sns == 0) { | |
2360 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2361 | return; | |
2362 | } | |
2363 | ||
7267c094 | 2364 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2365 | total = 0; |
2366 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2367 | sn = &sn_tab[i]; |
f9209915 MDCF |
2368 | available = 1; |
2369 | bs1 = NULL; | |
2370 | ||
2371 | while ((bs1 = bdrv_next(bs1))) { | |
2372 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2373 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2374 | if (ret < 0) { | |
2375 | available = 0; | |
2376 | break; | |
2377 | } | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | if (available) { | |
2382 | available_snapshots[total] = i; | |
2383 | total++; | |
2384 | } | |
a672b469 | 2385 | } |
f9209915 MDCF |
2386 | |
2387 | if (total > 0) { | |
2388 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2389 | for (i = 0; i < total; i++) { | |
2390 | sn = &sn_tab[available_snapshots[i]]; | |
2391 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2392 | } | |
2393 | } else { | |
2394 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2395 | } | |
2396 | ||
7267c094 AL |
2397 | g_free(sn_tab); |
2398 | g_free(available_snapshots); | |
f9209915 | 2399 | |
a672b469 | 2400 | } |
c5705a77 AK |
2401 | |
2402 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2403 | { | |
1ddde087 | 2404 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2405 | memory_region_name(mr), dev); |
2406 | } | |
2407 | ||
2408 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2409 | { | |
2410 | /* Nothing do to while the implementation is in RAMBlock */ | |
2411 | } | |
2412 | ||
2413 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2414 | { | |
2415 | vmstate_register_ram(mr, NULL); | |
2416 | } |