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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" |
28085f7b | 42 | #include "qemu/iov.h" |
511d2b14 | 43 | |
a672b469 | 44 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 45 | |
18995b98 | 46 | #ifndef ETH_P_RARP |
f8778a77 | 47 | #define ETH_P_RARP 0x8035 |
18995b98 N |
48 | #endif |
49 | #define ARP_HTYPE_ETH 0x0001 | |
50 | #define ARP_PTYPE_IP 0x0800 | |
51 | #define ARP_OP_REQUEST_REV 0x3 | |
52 | ||
53 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
54 | uint8_t *mac_addr) |
55 | { | |
18995b98 N |
56 | /* Ethernet header. */ |
57 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
58 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
59 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
60 | ||
61 | /* RARP header. */ | |
62 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
63 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
64 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
65 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
66 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
67 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
68 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
69 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
70 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
71 | ||
72 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
73 | memset(buf + 42, 0x00, 18); | |
74 | ||
75 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
76 | } |
77 | ||
f401ca22 | 78 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 79 | { |
18995b98 | 80 | uint8_t buf[60]; |
f401ca22 MM |
81 | int len; |
82 | ||
83 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
84 | ||
b356f76d | 85 | qemu_send_packet_raw(qemu_get_queue(nic), buf, len); |
f401ca22 MM |
86 | } |
87 | ||
88 | ||
89 | static void qemu_announce_self_once(void *opaque) | |
90 | { | |
ed8b330b GN |
91 | static int count = SELF_ANNOUNCE_ROUNDS; |
92 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 93 | |
f401ca22 MM |
94 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
95 | ||
18995b98 N |
96 | if (--count) { |
97 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 98 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 99 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
100 | } else { |
101 | qemu_del_timer(timer); | |
102 | qemu_free_timer(timer); | |
103 | } | |
104 | } | |
105 | ||
106 | void qemu_announce_self(void) | |
107 | { | |
108 | static QEMUTimer *timer; | |
7bd427d8 | 109 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 110 | qemu_announce_self_once(&timer); |
a672b469 AL |
111 | } |
112 | ||
113 | /***********************************************************/ | |
114 | /* savevm/loadvm support */ | |
115 | ||
116 | #define IO_BUF_SIZE 32768 | |
117 | ||
118 | struct QEMUFile { | |
9229bf3c | 119 | const QEMUFileOps *ops; |
a672b469 AL |
120 | void *opaque; |
121 | int is_write; | |
122 | ||
1964a397 PB |
123 | int64_t bytes_xfer; |
124 | int64_t xfer_limit; | |
125 | ||
3f2d38fa PB |
126 | int64_t pos; /* start of buffer when writing, end of buffer |
127 | when reading */ | |
a672b469 AL |
128 | int buf_index; |
129 | int buf_size; /* 0 when writing */ | |
130 | uint8_t buf[IO_BUF_SIZE]; | |
131 | ||
3961b4dd | 132 | int last_error; |
a672b469 AL |
133 | }; |
134 | ||
7f79dd28 | 135 | typedef struct QEMUFileStdio |
a672b469 | 136 | { |
7f79dd28 | 137 | FILE *stdio_file; |
a672b469 | 138 | QEMUFile *file; |
7f79dd28 | 139 | } QEMUFileStdio; |
a672b469 AL |
140 | |
141 | typedef struct QEMUFileSocket | |
142 | { | |
143 | int fd; | |
144 | QEMUFile *file; | |
145 | } QEMUFileSocket; | |
146 | ||
d7cd3694 SH |
147 | typedef struct { |
148 | Coroutine *co; | |
149 | int fd; | |
150 | } FDYieldUntilData; | |
151 | ||
152 | static void fd_coroutine_enter(void *opaque) | |
153 | { | |
154 | FDYieldUntilData *data = opaque; | |
155 | qemu_set_fd_handler(data->fd, NULL, NULL, NULL); | |
156 | qemu_coroutine_enter(data->co, NULL); | |
157 | } | |
158 | ||
159 | /** | |
160 | * Yield until a file descriptor becomes readable | |
161 | * | |
162 | * Note that this function clobbers the handlers for the file descriptor. | |
163 | */ | |
164 | static void coroutine_fn yield_until_fd_readable(int fd) | |
165 | { | |
166 | FDYieldUntilData data; | |
167 | ||
168 | assert(qemu_in_coroutine()); | |
169 | data.co = qemu_coroutine_self(); | |
170 | data.fd = fd; | |
171 | qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data); | |
172 | qemu_coroutine_yield(); | |
173 | } | |
174 | ||
28085f7b OW |
175 | static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt) |
176 | { | |
177 | QEMUFileSocket *s = opaque; | |
178 | ssize_t len; | |
179 | ssize_t size = iov_size(iov, iovcnt); | |
180 | ||
181 | len = iov_send(s->fd, iov, iovcnt, 0, size); | |
182 | if (len < size) { | |
183 | len = -socket_error(); | |
184 | } | |
185 | return len; | |
186 | } | |
187 | ||
70eb6330 PB |
188 | static int socket_get_fd(void *opaque) |
189 | { | |
190 | QEMUFileSocket *s = opaque; | |
191 | ||
192 | return s->fd; | |
193 | } | |
194 | ||
a672b469 AL |
195 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
196 | { | |
197 | QEMUFileSocket *s = opaque; | |
198 | ssize_t len; | |
199 | ||
595ab641 | 200 | for (;;) { |
00aa0040 | 201 | len = qemu_recv(s->fd, buf, size, 0); |
595ab641 PB |
202 | if (len != -1) { |
203 | break; | |
204 | } | |
205 | if (socket_error() == EAGAIN) { | |
d7cd3694 | 206 | yield_until_fd_readable(s->fd); |
595ab641 PB |
207 | } else if (socket_error() != EINTR) { |
208 | break; | |
209 | } | |
210 | } | |
a672b469 | 211 | |
595ab641 | 212 | if (len == -1) { |
a672b469 | 213 | len = -socket_error(); |
595ab641 | 214 | } |
a672b469 AL |
215 | return len; |
216 | } | |
217 | ||
0cc3f3cc PB |
218 | static int socket_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
219 | { | |
220 | QEMUFileSocket *s = opaque; | |
221 | ssize_t len; | |
222 | ||
223 | len = qemu_send_full(s->fd, buf, size, 0); | |
224 | if (len < size) { | |
225 | len = -socket_error(); | |
226 | } | |
227 | return len; | |
228 | } | |
229 | ||
a672b469 AL |
230 | static int socket_close(void *opaque) |
231 | { | |
232 | QEMUFileSocket *s = opaque; | |
ab52a824 | 233 | closesocket(s->fd); |
7267c094 | 234 | g_free(s); |
a672b469 AL |
235 | return 0; |
236 | } | |
237 | ||
70eb6330 PB |
238 | static int stdio_get_fd(void *opaque) |
239 | { | |
240 | QEMUFileStdio *s = opaque; | |
241 | ||
242 | return fileno(s->stdio_file); | |
243 | } | |
244 | ||
7f79dd28 | 245 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 246 | { |
7f79dd28 PB |
247 | QEMUFileStdio *s = opaque; |
248 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
249 | } |
250 | ||
7f79dd28 | 251 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 252 | { |
7f79dd28 PB |
253 | QEMUFileStdio *s = opaque; |
254 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
255 | int bytes; |
256 | ||
595ab641 | 257 | for (;;) { |
8a67ec4d UL |
258 | clearerr(fp); |
259 | bytes = fread(buf, 1, size, fp); | |
595ab641 PB |
260 | if (bytes != 0 || !ferror(fp)) { |
261 | break; | |
262 | } | |
263 | if (errno == EAGAIN) { | |
d7cd3694 | 264 | yield_until_fd_readable(fileno(fp)); |
595ab641 PB |
265 | } else if (errno != EINTR) { |
266 | break; | |
267 | } | |
268 | } | |
8a67ec4d | 269 | return bytes; |
a672b469 AL |
270 | } |
271 | ||
7f79dd28 PB |
272 | static int stdio_pclose(void *opaque) |
273 | { | |
274 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
275 | int ret; |
276 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
277 | if (ret == -1) { |
278 | ret = -errno; | |
13c7b2da PB |
279 | } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { |
280 | /* close succeeded, but non-zero exit code: */ | |
281 | ret = -EIO; /* fake errno value */ | |
26f1af0a | 282 | } |
7267c094 | 283 | g_free(s); |
41ef56e6 | 284 | return ret; |
7f79dd28 PB |
285 | } |
286 | ||
287 | static int stdio_fclose(void *opaque) | |
a672b469 | 288 | { |
7f79dd28 | 289 | QEMUFileStdio *s = opaque; |
0e286705 | 290 | int ret = 0; |
ce39ee31 PB |
291 | |
292 | if (s->file->ops->put_buffer) { | |
293 | int fd = fileno(s->stdio_file); | |
294 | struct stat st; | |
295 | ||
296 | ret = fstat(fd, &st); | |
297 | if (ret == 0 && S_ISREG(st.st_mode)) { | |
298 | /* | |
299 | * If the file handle is a regular file make sure the | |
300 | * data is flushed to disk before signaling success. | |
301 | */ | |
302 | ret = fsync(fd); | |
303 | if (ret != 0) { | |
304 | ret = -errno; | |
305 | return ret; | |
306 | } | |
307 | } | |
308 | } | |
0e286705 EH |
309 | if (fclose(s->stdio_file) == EOF) { |
310 | ret = -errno; | |
311 | } | |
7267c094 | 312 | g_free(s); |
0e286705 | 313 | return ret; |
a672b469 AL |
314 | } |
315 | ||
9229bf3c | 316 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 317 | .get_fd = stdio_get_fd, |
9229bf3c PB |
318 | .get_buffer = stdio_get_buffer, |
319 | .close = stdio_pclose | |
320 | }; | |
321 | ||
322 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 323 | .get_fd = stdio_get_fd, |
9229bf3c PB |
324 | .put_buffer = stdio_put_buffer, |
325 | .close = stdio_pclose | |
326 | }; | |
327 | ||
817b9ed5 | 328 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
a672b469 | 329 | { |
817b9ed5 | 330 | FILE *stdio_file; |
7f79dd28 | 331 | QEMUFileStdio *s; |
a672b469 | 332 | |
817b9ed5 PB |
333 | stdio_file = popen(command, mode); |
334 | if (stdio_file == NULL) { | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { | |
a672b469 AL |
339 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
340 | return NULL; | |
341 | } | |
342 | ||
7267c094 | 343 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 344 | |
7f79dd28 | 345 | s->stdio_file = stdio_file; |
a672b469 AL |
346 | |
347 | if(mode[0] == 'r') { | |
9229bf3c | 348 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 349 | } else { |
9229bf3c | 350 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 351 | } |
a672b469 AL |
352 | return s->file; |
353 | } | |
354 | ||
9229bf3c | 355 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 356 | .get_fd = stdio_get_fd, |
9229bf3c PB |
357 | .get_buffer = stdio_get_buffer, |
358 | .close = stdio_fclose | |
359 | }; | |
360 | ||
361 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 362 | .get_fd = stdio_get_fd, |
9229bf3c PB |
363 | .put_buffer = stdio_put_buffer, |
364 | .close = stdio_fclose | |
365 | }; | |
366 | ||
5ac1fad3 PB |
367 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
368 | { | |
369 | QEMUFileStdio *s; | |
370 | ||
371 | if (mode == NULL || | |
372 | (mode[0] != 'r' && mode[0] != 'w') || | |
373 | mode[1] != 'b' || mode[2] != 0) { | |
374 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
375 | return NULL; | |
376 | } | |
377 | ||
7267c094 | 378 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
379 | s->stdio_file = fdopen(fd, mode); |
380 | if (!s->stdio_file) | |
381 | goto fail; | |
382 | ||
383 | if(mode[0] == 'r') { | |
9229bf3c | 384 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 385 | } else { |
9229bf3c | 386 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
387 | } |
388 | return s->file; | |
389 | ||
390 | fail: | |
7267c094 | 391 | g_free(s); |
5ac1fad3 PB |
392 | return NULL; |
393 | } | |
394 | ||
9229bf3c | 395 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 396 | .get_fd = socket_get_fd, |
9229bf3c PB |
397 | .get_buffer = socket_get_buffer, |
398 | .close = socket_close | |
399 | }; | |
400 | ||
0cc3f3cc PB |
401 | static const QEMUFileOps socket_write_ops = { |
402 | .get_fd = socket_get_fd, | |
403 | .put_buffer = socket_put_buffer, | |
28085f7b | 404 | .writev_buffer = socket_writev_buffer, |
0cc3f3cc PB |
405 | .close = socket_close |
406 | }; | |
407 | ||
408 | QEMUFile *qemu_fopen_socket(int fd, const char *mode) | |
a672b469 | 409 | { |
7267c094 | 410 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 411 | |
0cc3f3cc PB |
412 | if (mode == NULL || |
413 | (mode[0] != 'r' && mode[0] != 'w') || | |
414 | mode[1] != 'b' || mode[2] != 0) { | |
415 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); | |
416 | return NULL; | |
417 | } | |
418 | ||
a672b469 | 419 | s->fd = fd; |
0cc3f3cc | 420 | if (mode[0] == 'w') { |
f8bbc128 | 421 | socket_set_block(s->fd); |
0cc3f3cc PB |
422 | s->file = qemu_fopen_ops(s, &socket_write_ops); |
423 | } else { | |
424 | s->file = qemu_fopen_ops(s, &socket_read_ops); | |
425 | } | |
a672b469 AL |
426 | return s->file; |
427 | } | |
428 | ||
a672b469 AL |
429 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
430 | { | |
431 | QEMUFileStdio *s; | |
432 | ||
7f79dd28 PB |
433 | if (mode == NULL || |
434 | (mode[0] != 'r' && mode[0] != 'w') || | |
435 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 436 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
437 | return NULL; |
438 | } | |
439 | ||
7267c094 | 440 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 441 | |
7f79dd28 PB |
442 | s->stdio_file = fopen(filename, mode); |
443 | if (!s->stdio_file) | |
a672b469 | 444 | goto fail; |
c163b5ca | 445 | |
7f79dd28 | 446 | if(mode[0] == 'w') { |
9229bf3c | 447 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 448 | } else { |
9229bf3c | 449 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
450 | } |
451 | return s->file; | |
a672b469 | 452 | fail: |
7267c094 | 453 | g_free(s); |
a672b469 AL |
454 | return NULL; |
455 | } | |
456 | ||
178e08a5 | 457 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
458 | int64_t pos, int size) |
459 | { | |
45566e9c | 460 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
461 | return size; |
462 | } | |
463 | ||
178e08a5 | 464 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 465 | { |
45566e9c | 466 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
467 | } |
468 | ||
469 | static int bdrv_fclose(void *opaque) | |
470 | { | |
ad492c92 | 471 | return bdrv_flush(opaque); |
a672b469 AL |
472 | } |
473 | ||
9229bf3c PB |
474 | static const QEMUFileOps bdrv_read_ops = { |
475 | .get_buffer = block_get_buffer, | |
476 | .close = bdrv_fclose | |
477 | }; | |
478 | ||
479 | static const QEMUFileOps bdrv_write_ops = { | |
480 | .put_buffer = block_put_buffer, | |
481 | .close = bdrv_fclose | |
482 | }; | |
483 | ||
45566e9c | 484 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 485 | { |
a672b469 | 486 | if (is_writable) |
9229bf3c PB |
487 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
488 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
489 | } |
490 | ||
9229bf3c | 491 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
492 | { |
493 | QEMUFile *f; | |
494 | ||
7267c094 | 495 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
496 | |
497 | f->opaque = opaque; | |
9229bf3c | 498 | f->ops = ops; |
a672b469 | 499 | f->is_write = 0; |
a672b469 AL |
500 | return f; |
501 | } | |
502 | ||
624b9cc2 | 503 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 504 | { |
3961b4dd | 505 | return f->last_error; |
a672b469 AL |
506 | } |
507 | ||
05f28b83 | 508 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 509 | { |
afe41931 JQ |
510 | if (f->last_error == 0) { |
511 | f->last_error = ret; | |
512 | } | |
4dabe248 AL |
513 | } |
514 | ||
d82ca915 EH |
515 | /** Flushes QEMUFile buffer |
516 | * | |
d82ca915 | 517 | */ |
05f28b83 | 518 | static void qemu_fflush(QEMUFile *f) |
a672b469 | 519 | { |
7311bea3 JQ |
520 | int ret = 0; |
521 | ||
93bf2104 PB |
522 | if (!f->ops->put_buffer) { |
523 | return; | |
524 | } | |
a672b469 | 525 | if (f->is_write && f->buf_index > 0) { |
3f2d38fa | 526 | ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index); |
7311bea3 | 527 | if (ret >= 0) { |
3f2d38fa | 528 | f->pos += f->buf_index; |
7311bea3 | 529 | } |
a672b469 AL |
530 | f->buf_index = 0; |
531 | } | |
93bf2104 PB |
532 | if (ret < 0) { |
533 | qemu_file_set_error(f, ret); | |
534 | } | |
a672b469 AL |
535 | } |
536 | ||
537 | static void qemu_fill_buffer(QEMUFile *f) | |
538 | { | |
539 | int len; | |
0046c45b | 540 | int pending; |
a672b469 | 541 | |
9229bf3c | 542 | if (!f->ops->get_buffer) |
a672b469 AL |
543 | return; |
544 | ||
545 | if (f->is_write) | |
546 | abort(); | |
547 | ||
0046c45b JQ |
548 | pending = f->buf_size - f->buf_index; |
549 | if (pending > 0) { | |
550 | memmove(f->buf, f->buf + f->buf_index, pending); | |
551 | } | |
552 | f->buf_index = 0; | |
553 | f->buf_size = pending; | |
554 | ||
3f2d38fa | 555 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, |
0046c45b | 556 | IO_BUF_SIZE - pending); |
a672b469 | 557 | if (len > 0) { |
0046c45b | 558 | f->buf_size += len; |
3f2d38fa | 559 | f->pos += len; |
fa39a30f | 560 | } else if (len == 0) { |
02c4a051 | 561 | qemu_file_set_error(f, -EIO); |
a672b469 | 562 | } else if (len != -EAGAIN) |
c29110d5 | 563 | qemu_file_set_error(f, len); |
a672b469 AL |
564 | } |
565 | ||
70eb6330 PB |
566 | int qemu_get_fd(QEMUFile *f) |
567 | { | |
568 | if (f->ops->get_fd) { | |
569 | return f->ops->get_fd(f->opaque); | |
570 | } | |
571 | return -1; | |
572 | } | |
573 | ||
d82ca915 EH |
574 | /** Closes the file |
575 | * | |
576 | * Returns negative error value if any error happened on previous operations or | |
577 | * while closing the file. Returns 0 or positive number on success. | |
578 | * | |
579 | * The meaning of return value on success depends on the specific backend | |
580 | * being used. | |
581 | */ | |
582 | int qemu_fclose(QEMUFile *f) | |
583 | { | |
29eee86f | 584 | int ret; |
93bf2104 PB |
585 | qemu_fflush(f); |
586 | ret = qemu_file_get_error(f); | |
7311bea3 | 587 | |
9229bf3c PB |
588 | if (f->ops->close) { |
589 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
590 | if (ret >= 0) { |
591 | ret = ret2; | |
592 | } | |
7311bea3 | 593 | } |
d82ca915 EH |
594 | /* If any error was spotted before closing, we should report it |
595 | * instead of the close() return value. | |
596 | */ | |
597 | if (f->last_error) { | |
598 | ret = f->last_error; | |
599 | } | |
7267c094 | 600 | g_free(f); |
a672b469 AL |
601 | return ret; |
602 | } | |
603 | ||
a672b469 AL |
604 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
605 | { | |
606 | int l; | |
607 | ||
c10682cb JQ |
608 | if (f->last_error) { |
609 | return; | |
610 | } | |
611 | ||
612 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
613 | fprintf(stderr, |
614 | "Attempted to write to buffer while read buffer is not empty\n"); | |
615 | abort(); | |
616 | } | |
617 | ||
c10682cb | 618 | while (size > 0) { |
a672b469 AL |
619 | l = IO_BUF_SIZE - f->buf_index; |
620 | if (l > size) | |
621 | l = size; | |
622 | memcpy(f->buf + f->buf_index, buf, l); | |
623 | f->is_write = 1; | |
624 | f->buf_index += l; | |
1964a397 | 625 | f->bytes_xfer += l; |
a672b469 AL |
626 | buf += l; |
627 | size -= l; | |
7311bea3 | 628 | if (f->buf_index >= IO_BUF_SIZE) { |
93bf2104 PB |
629 | qemu_fflush(f); |
630 | if (qemu_file_get_error(f)) { | |
c10682cb JQ |
631 | break; |
632 | } | |
7311bea3 | 633 | } |
a672b469 AL |
634 | } |
635 | } | |
636 | ||
637 | void qemu_put_byte(QEMUFile *f, int v) | |
638 | { | |
c10682cb JQ |
639 | if (f->last_error) { |
640 | return; | |
641 | } | |
642 | ||
643 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
644 | fprintf(stderr, |
645 | "Attempted to write to buffer while read buffer is not empty\n"); | |
646 | abort(); | |
647 | } | |
648 | ||
649 | f->buf[f->buf_index++] = v; | |
650 | f->is_write = 1; | |
7d8a30bb OW |
651 | f->bytes_xfer++; |
652 | ||
7311bea3 | 653 | if (f->buf_index >= IO_BUF_SIZE) { |
93bf2104 | 654 | qemu_fflush(f); |
7311bea3 | 655 | } |
a672b469 AL |
656 | } |
657 | ||
c6380724 | 658 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 659 | { |
c6380724 JQ |
660 | if (f->buf_index + size <= f->buf_size) { |
661 | f->buf_index += size; | |
662 | } | |
663 | } | |
664 | ||
665 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 666 | { |
c6380724 JQ |
667 | int pending; |
668 | int index; | |
a672b469 | 669 | |
b9ce1454 | 670 | if (f->is_write) { |
a672b469 | 671 | abort(); |
b9ce1454 | 672 | } |
a672b469 | 673 | |
c6380724 JQ |
674 | index = f->buf_index + offset; |
675 | pending = f->buf_size - index; | |
676 | if (pending < size) { | |
677 | qemu_fill_buffer(f); | |
678 | index = f->buf_index + offset; | |
679 | pending = f->buf_size - index; | |
680 | } | |
681 | ||
682 | if (pending <= 0) { | |
683 | return 0; | |
684 | } | |
685 | if (size > pending) { | |
686 | size = pending; | |
687 | } | |
688 | ||
689 | memcpy(buf, f->buf + index, size); | |
690 | return size; | |
691 | } | |
692 | ||
693 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
694 | { | |
695 | int pending = size; | |
696 | int done = 0; | |
697 | ||
698 | while (pending > 0) { | |
699 | int res; | |
700 | ||
701 | res = qemu_peek_buffer(f, buf, pending, 0); | |
702 | if (res == 0) { | |
703 | return done; | |
a672b469 | 704 | } |
c6380724 JQ |
705 | qemu_file_skip(f, res); |
706 | buf += res; | |
707 | pending -= res; | |
708 | done += res; | |
a672b469 | 709 | } |
c6380724 | 710 | return done; |
a672b469 AL |
711 | } |
712 | ||
c6380724 | 713 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 714 | { |
c6380724 JQ |
715 | int index = f->buf_index + offset; |
716 | ||
b9ce1454 | 717 | if (f->is_write) { |
811814bd | 718 | abort(); |
b9ce1454 | 719 | } |
811814bd | 720 | |
c6380724 | 721 | if (index >= f->buf_size) { |
811814bd | 722 | qemu_fill_buffer(f); |
c6380724 JQ |
723 | index = f->buf_index + offset; |
724 | if (index >= f->buf_size) { | |
811814bd | 725 | return 0; |
b9ce1454 | 726 | } |
811814bd | 727 | } |
c6380724 | 728 | return f->buf[index]; |
811814bd JQ |
729 | } |
730 | ||
a672b469 AL |
731 | int qemu_get_byte(QEMUFile *f) |
732 | { | |
65f3bb3d | 733 | int result; |
a672b469 | 734 | |
c6380724 JQ |
735 | result = qemu_peek_byte(f, 0); |
736 | qemu_file_skip(f, 1); | |
65f3bb3d | 737 | return result; |
a672b469 AL |
738 | } |
739 | ||
ad55ab42 | 740 | int64_t qemu_ftell(QEMUFile *f) |
a672b469 | 741 | { |
3f2d38fa PB |
742 | qemu_fflush(f); |
743 | return f->pos; | |
a672b469 AL |
744 | } |
745 | ||
a672b469 AL |
746 | int qemu_file_rate_limit(QEMUFile *f) |
747 | { | |
1964a397 PB |
748 | if (qemu_file_get_error(f)) { |
749 | return 1; | |
750 | } | |
751 | if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { | |
752 | return 1; | |
753 | } | |
a672b469 AL |
754 | return 0; |
755 | } | |
756 | ||
3d002df3 | 757 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 758 | { |
1964a397 | 759 | return f->xfer_limit; |
c163b5ca | 760 | } |
761 | ||
1964a397 | 762 | void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) |
19629537 | 763 | { |
1964a397 PB |
764 | f->xfer_limit = limit; |
765 | } | |
19629537 | 766 | |
1964a397 PB |
767 | void qemu_file_reset_rate_limit(QEMUFile *f) |
768 | { | |
769 | f->bytes_xfer = 0; | |
19629537 GC |
770 | } |
771 | ||
a672b469 AL |
772 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
773 | { | |
774 | qemu_put_byte(f, v >> 8); | |
775 | qemu_put_byte(f, v); | |
776 | } | |
777 | ||
778 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
779 | { | |
780 | qemu_put_byte(f, v >> 24); | |
781 | qemu_put_byte(f, v >> 16); | |
782 | qemu_put_byte(f, v >> 8); | |
783 | qemu_put_byte(f, v); | |
784 | } | |
785 | ||
786 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
787 | { | |
788 | qemu_put_be32(f, v >> 32); | |
789 | qemu_put_be32(f, v); | |
790 | } | |
791 | ||
792 | unsigned int qemu_get_be16(QEMUFile *f) | |
793 | { | |
794 | unsigned int v; | |
795 | v = qemu_get_byte(f) << 8; | |
796 | v |= qemu_get_byte(f); | |
797 | return v; | |
798 | } | |
799 | ||
800 | unsigned int qemu_get_be32(QEMUFile *f) | |
801 | { | |
802 | unsigned int v; | |
803 | v = qemu_get_byte(f) << 24; | |
804 | v |= qemu_get_byte(f) << 16; | |
805 | v |= qemu_get_byte(f) << 8; | |
806 | v |= qemu_get_byte(f); | |
807 | return v; | |
808 | } | |
809 | ||
810 | uint64_t qemu_get_be64(QEMUFile *f) | |
811 | { | |
812 | uint64_t v; | |
813 | v = (uint64_t)qemu_get_be32(f) << 32; | |
814 | v |= qemu_get_be32(f); | |
815 | return v; | |
816 | } | |
817 | ||
2ff68d07 PB |
818 | |
819 | /* timer */ | |
820 | ||
821 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
822 | { | |
823 | uint64_t expire_time; | |
824 | ||
825 | expire_time = qemu_timer_expire_time_ns(ts); | |
826 | qemu_put_be64(f, expire_time); | |
827 | } | |
828 | ||
829 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
830 | { | |
831 | uint64_t expire_time; | |
832 | ||
833 | expire_time = qemu_get_be64(f); | |
834 | if (expire_time != -1) { | |
835 | qemu_mod_timer_ns(ts, expire_time); | |
836 | } else { | |
837 | qemu_del_timer(ts); | |
838 | } | |
839 | } | |
840 | ||
841 | ||
cdae5cfb GH |
842 | /* bool */ |
843 | ||
844 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
845 | { | |
846 | bool *v = pv; | |
847 | *v = qemu_get_byte(f); | |
848 | return 0; | |
849 | } | |
850 | ||
851 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
852 | { | |
853 | bool *v = pv; | |
854 | qemu_put_byte(f, *v); | |
855 | } | |
856 | ||
857 | const VMStateInfo vmstate_info_bool = { | |
858 | .name = "bool", | |
859 | .get = get_bool, | |
860 | .put = put_bool, | |
861 | }; | |
862 | ||
9ed7d6ae JQ |
863 | /* 8 bit int */ |
864 | ||
865 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
866 | { | |
867 | int8_t *v = pv; | |
868 | qemu_get_s8s(f, v); | |
869 | return 0; | |
870 | } | |
871 | ||
84e2e3eb | 872 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 873 | { |
84e2e3eb | 874 | int8_t *v = pv; |
9ed7d6ae JQ |
875 | qemu_put_s8s(f, v); |
876 | } | |
877 | ||
878 | const VMStateInfo vmstate_info_int8 = { | |
879 | .name = "int8", | |
880 | .get = get_int8, | |
881 | .put = put_int8, | |
882 | }; | |
883 | ||
884 | /* 16 bit int */ | |
885 | ||
886 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
887 | { | |
888 | int16_t *v = pv; | |
889 | qemu_get_sbe16s(f, v); | |
890 | return 0; | |
891 | } | |
892 | ||
84e2e3eb | 893 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 894 | { |
84e2e3eb | 895 | int16_t *v = pv; |
9ed7d6ae JQ |
896 | qemu_put_sbe16s(f, v); |
897 | } | |
898 | ||
899 | const VMStateInfo vmstate_info_int16 = { | |
900 | .name = "int16", | |
901 | .get = get_int16, | |
902 | .put = put_int16, | |
903 | }; | |
904 | ||
905 | /* 32 bit int */ | |
906 | ||
907 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
908 | { | |
909 | int32_t *v = pv; | |
910 | qemu_get_sbe32s(f, v); | |
911 | return 0; | |
912 | } | |
913 | ||
84e2e3eb | 914 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 915 | { |
84e2e3eb | 916 | int32_t *v = pv; |
9ed7d6ae JQ |
917 | qemu_put_sbe32s(f, v); |
918 | } | |
919 | ||
920 | const VMStateInfo vmstate_info_int32 = { | |
921 | .name = "int32", | |
922 | .get = get_int32, | |
923 | .put = put_int32, | |
924 | }; | |
925 | ||
82501660 JQ |
926 | /* 32 bit int. See that the received value is the same than the one |
927 | in the field */ | |
928 | ||
929 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
930 | { | |
931 | int32_t *v = pv; | |
932 | int32_t v2; | |
933 | qemu_get_sbe32s(f, &v2); | |
934 | ||
935 | if (*v == v2) | |
936 | return 0; | |
937 | return -EINVAL; | |
938 | } | |
939 | ||
940 | const VMStateInfo vmstate_info_int32_equal = { | |
941 | .name = "int32 equal", | |
942 | .get = get_int32_equal, | |
943 | .put = put_int32, | |
944 | }; | |
945 | ||
0a031e0a JQ |
946 | /* 32 bit int. See that the received value is the less or the same |
947 | than the one in the field */ | |
948 | ||
949 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
950 | { | |
951 | int32_t *old = pv; | |
952 | int32_t new; | |
953 | qemu_get_sbe32s(f, &new); | |
954 | ||
955 | if (*old <= new) | |
956 | return 0; | |
957 | return -EINVAL; | |
958 | } | |
959 | ||
960 | const VMStateInfo vmstate_info_int32_le = { | |
961 | .name = "int32 equal", | |
962 | .get = get_int32_le, | |
963 | .put = put_int32, | |
964 | }; | |
965 | ||
9ed7d6ae JQ |
966 | /* 64 bit int */ |
967 | ||
968 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
969 | { | |
970 | int64_t *v = pv; | |
971 | qemu_get_sbe64s(f, v); | |
972 | return 0; | |
973 | } | |
974 | ||
84e2e3eb | 975 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 976 | { |
84e2e3eb | 977 | int64_t *v = pv; |
9ed7d6ae JQ |
978 | qemu_put_sbe64s(f, v); |
979 | } | |
980 | ||
981 | const VMStateInfo vmstate_info_int64 = { | |
982 | .name = "int64", | |
983 | .get = get_int64, | |
984 | .put = put_int64, | |
985 | }; | |
986 | ||
987 | /* 8 bit unsigned int */ | |
988 | ||
989 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
990 | { | |
991 | uint8_t *v = pv; | |
992 | qemu_get_8s(f, v); | |
993 | return 0; | |
994 | } | |
995 | ||
84e2e3eb | 996 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 997 | { |
84e2e3eb | 998 | uint8_t *v = pv; |
9ed7d6ae JQ |
999 | qemu_put_8s(f, v); |
1000 | } | |
1001 | ||
1002 | const VMStateInfo vmstate_info_uint8 = { | |
1003 | .name = "uint8", | |
1004 | .get = get_uint8, | |
1005 | .put = put_uint8, | |
1006 | }; | |
1007 | ||
1008 | /* 16 bit unsigned int */ | |
1009 | ||
1010 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
1011 | { | |
1012 | uint16_t *v = pv; | |
1013 | qemu_get_be16s(f, v); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
84e2e3eb | 1017 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1018 | { |
84e2e3eb | 1019 | uint16_t *v = pv; |
9ed7d6ae JQ |
1020 | qemu_put_be16s(f, v); |
1021 | } | |
1022 | ||
1023 | const VMStateInfo vmstate_info_uint16 = { | |
1024 | .name = "uint16", | |
1025 | .get = get_uint16, | |
1026 | .put = put_uint16, | |
1027 | }; | |
1028 | ||
1029 | /* 32 bit unsigned int */ | |
1030 | ||
1031 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
1032 | { | |
1033 | uint32_t *v = pv; | |
1034 | qemu_get_be32s(f, v); | |
1035 | return 0; | |
1036 | } | |
1037 | ||
84e2e3eb | 1038 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1039 | { |
84e2e3eb | 1040 | uint32_t *v = pv; |
9ed7d6ae JQ |
1041 | qemu_put_be32s(f, v); |
1042 | } | |
1043 | ||
1044 | const VMStateInfo vmstate_info_uint32 = { | |
1045 | .name = "uint32", | |
1046 | .get = get_uint32, | |
1047 | .put = put_uint32, | |
1048 | }; | |
1049 | ||
9122a8fe JQ |
1050 | /* 32 bit uint. See that the received value is the same than the one |
1051 | in the field */ | |
1052 | ||
1053 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1054 | { | |
1055 | uint32_t *v = pv; | |
1056 | uint32_t v2; | |
1057 | qemu_get_be32s(f, &v2); | |
1058 | ||
1059 | if (*v == v2) { | |
1060 | return 0; | |
1061 | } | |
1062 | return -EINVAL; | |
1063 | } | |
1064 | ||
1065 | const VMStateInfo vmstate_info_uint32_equal = { | |
1066 | .name = "uint32 equal", | |
1067 | .get = get_uint32_equal, | |
1068 | .put = put_uint32, | |
1069 | }; | |
1070 | ||
9ed7d6ae JQ |
1071 | /* 64 bit unsigned int */ |
1072 | ||
1073 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1074 | { | |
1075 | uint64_t *v = pv; | |
1076 | qemu_get_be64s(f, v); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
84e2e3eb | 1080 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1081 | { |
84e2e3eb | 1082 | uint64_t *v = pv; |
9ed7d6ae JQ |
1083 | qemu_put_be64s(f, v); |
1084 | } | |
1085 | ||
1086 | const VMStateInfo vmstate_info_uint64 = { | |
1087 | .name = "uint64", | |
1088 | .get = get_uint64, | |
1089 | .put = put_uint64, | |
1090 | }; | |
1091 | ||
e344b8a1 DG |
1092 | /* 64 bit unsigned int. See that the received value is the same than the one |
1093 | in the field */ | |
1094 | ||
1095 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) | |
1096 | { | |
1097 | uint64_t *v = pv; | |
1098 | uint64_t v2; | |
1099 | qemu_get_be64s(f, &v2); | |
1100 | ||
1101 | if (*v == v2) { | |
1102 | return 0; | |
1103 | } | |
1104 | return -EINVAL; | |
1105 | } | |
1106 | ||
1107 | const VMStateInfo vmstate_info_uint64_equal = { | |
1108 | .name = "int64 equal", | |
1109 | .get = get_uint64_equal, | |
1110 | .put = put_uint64, | |
1111 | }; | |
1112 | ||
80cd83e7 JQ |
1113 | /* 8 bit int. See that the received value is the same than the one |
1114 | in the field */ | |
1115 | ||
1116 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1117 | { | |
1118 | uint8_t *v = pv; | |
1119 | uint8_t v2; | |
1120 | qemu_get_8s(f, &v2); | |
1121 | ||
1122 | if (*v == v2) | |
1123 | return 0; | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
1127 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1128 | .name = "uint8 equal", |
80cd83e7 JQ |
1129 | .get = get_uint8_equal, |
1130 | .put = put_uint8, | |
1131 | }; | |
1132 | ||
dc3b83a0 JQ |
1133 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1134 | in the field */ | |
1135 | ||
1136 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1137 | { | |
1138 | uint16_t *v = pv; | |
1139 | uint16_t v2; | |
1140 | qemu_get_be16s(f, &v2); | |
1141 | ||
1142 | if (*v == v2) | |
1143 | return 0; | |
1144 | return -EINVAL; | |
1145 | } | |
1146 | ||
1147 | const VMStateInfo vmstate_info_uint16_equal = { | |
1148 | .name = "uint16 equal", | |
1149 | .get = get_uint16_equal, | |
1150 | .put = put_uint16, | |
1151 | }; | |
1152 | ||
213945e4 DG |
1153 | /* floating point */ |
1154 | ||
1155 | static int get_float64(QEMUFile *f, void *pv, size_t size) | |
1156 | { | |
1157 | float64 *v = pv; | |
1158 | ||
1159 | *v = make_float64(qemu_get_be64(f)); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static void put_float64(QEMUFile *f, void *pv, size_t size) | |
1164 | { | |
1165 | uint64_t *v = pv; | |
1166 | ||
1167 | qemu_put_be64(f, float64_val(*v)); | |
1168 | } | |
1169 | ||
1170 | const VMStateInfo vmstate_info_float64 = { | |
1171 | .name = "float64", | |
1172 | .get = get_float64, | |
1173 | .put = put_float64, | |
1174 | }; | |
1175 | ||
dde0463b JQ |
1176 | /* timers */ |
1177 | ||
1178 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1179 | { | |
1180 | QEMUTimer *v = pv; | |
1181 | qemu_get_timer(f, v); | |
1182 | return 0; | |
1183 | } | |
1184 | ||
84e2e3eb | 1185 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1186 | { |
84e2e3eb | 1187 | QEMUTimer *v = pv; |
dde0463b JQ |
1188 | qemu_put_timer(f, v); |
1189 | } | |
1190 | ||
1191 | const VMStateInfo vmstate_info_timer = { | |
1192 | .name = "timer", | |
1193 | .get = get_timer, | |
1194 | .put = put_timer, | |
1195 | }; | |
1196 | ||
6f67c50f JQ |
1197 | /* uint8_t buffers */ |
1198 | ||
1199 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1200 | { | |
1201 | uint8_t *v = pv; | |
1202 | qemu_get_buffer(f, v, size); | |
1203 | return 0; | |
1204 | } | |
1205 | ||
84e2e3eb | 1206 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1207 | { |
84e2e3eb | 1208 | uint8_t *v = pv; |
6f67c50f JQ |
1209 | qemu_put_buffer(f, v, size); |
1210 | } | |
1211 | ||
1212 | const VMStateInfo vmstate_info_buffer = { | |
1213 | .name = "buffer", | |
1214 | .get = get_buffer, | |
1215 | .put = put_buffer, | |
1216 | }; | |
1217 | ||
76507c75 | 1218 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1219 | not useful anymore */ |
76507c75 JQ |
1220 | |
1221 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1222 | { | |
21174c34 JK |
1223 | uint8_t buf[1024]; |
1224 | int block_len; | |
1225 | ||
1226 | while (size > 0) { | |
1227 | block_len = MIN(sizeof(buf), size); | |
1228 | size -= block_len; | |
1229 | qemu_get_buffer(f, buf, block_len); | |
1230 | } | |
1231 | return 0; | |
76507c75 JQ |
1232 | } |
1233 | ||
1234 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1235 | { | |
21174c34 JK |
1236 | static const uint8_t buf[1024]; |
1237 | int block_len; | |
1238 | ||
1239 | while (size > 0) { | |
1240 | block_len = MIN(sizeof(buf), size); | |
1241 | size -= block_len; | |
1242 | qemu_put_buffer(f, buf, block_len); | |
1243 | } | |
76507c75 JQ |
1244 | } |
1245 | ||
1246 | const VMStateInfo vmstate_info_unused_buffer = { | |
1247 | .name = "unused_buffer", | |
1248 | .get = get_unused_buffer, | |
1249 | .put = put_unused_buffer, | |
1250 | }; | |
1251 | ||
08e99e29 PM |
1252 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1253 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1254 | * bit words with the bits in big endian order. The in-memory format | |
1255 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1256 | */ | |
1257 | /* This is the number of 64 bit words sent over the wire */ | |
1258 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1259 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1260 | { | |
1261 | unsigned long *bmp = pv; | |
1262 | int i, idx = 0; | |
1263 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1264 | uint64_t w = qemu_get_be64(f); | |
1265 | bmp[idx++] = w; | |
1266 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1267 | bmp[idx++] = w >> 32; | |
1268 | } | |
1269 | } | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1274 | { | |
1275 | unsigned long *bmp = pv; | |
1276 | int i, idx = 0; | |
1277 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1278 | uint64_t w = bmp[idx++]; | |
1279 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1280 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1281 | } | |
1282 | qemu_put_be64(f, w); | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | const VMStateInfo vmstate_info_bitmap = { | |
1287 | .name = "bitmap", | |
1288 | .get = get_bitmap, | |
1289 | .put = put_bitmap, | |
1290 | }; | |
1291 | ||
7685ee6a AW |
1292 | typedef struct CompatEntry { |
1293 | char idstr[256]; | |
1294 | int instance_id; | |
1295 | } CompatEntry; | |
1296 | ||
a672b469 | 1297 | typedef struct SaveStateEntry { |
72cf2d4f | 1298 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1299 | char idstr[256]; |
1300 | int instance_id; | |
4d2ffa08 | 1301 | int alias_id; |
a672b469 AL |
1302 | int version_id; |
1303 | int section_id; | |
22ea40f4 | 1304 | SaveVMHandlers *ops; |
9ed7d6ae | 1305 | const VMStateDescription *vmsd; |
a672b469 | 1306 | void *opaque; |
7685ee6a | 1307 | CompatEntry *compat; |
24312968 | 1308 | int no_migrate; |
a7ae8355 | 1309 | int is_ram; |
a672b469 AL |
1310 | } SaveStateEntry; |
1311 | ||
c163b5ca | 1312 | |
72cf2d4f BS |
1313 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1314 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1315 | static int global_section_id; |
a672b469 | 1316 | |
8718e999 JQ |
1317 | static int calculate_new_instance_id(const char *idstr) |
1318 | { | |
1319 | SaveStateEntry *se; | |
1320 | int instance_id = 0; | |
1321 | ||
72cf2d4f | 1322 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1323 | if (strcmp(idstr, se->idstr) == 0 |
1324 | && instance_id <= se->instance_id) { | |
1325 | instance_id = se->instance_id + 1; | |
1326 | } | |
1327 | } | |
1328 | return instance_id; | |
1329 | } | |
1330 | ||
7685ee6a AW |
1331 | static int calculate_compat_instance_id(const char *idstr) |
1332 | { | |
1333 | SaveStateEntry *se; | |
1334 | int instance_id = 0; | |
1335 | ||
1336 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1337 | if (!se->compat) | |
1338 | continue; | |
1339 | ||
1340 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1341 | && instance_id <= se->compat->instance_id) { | |
1342 | instance_id = se->compat->instance_id + 1; | |
1343 | } | |
1344 | } | |
1345 | return instance_id; | |
1346 | } | |
1347 | ||
a672b469 AL |
1348 | /* TODO: Individual devices generally have very little idea about the rest |
1349 | of the system, so instance_id should be removed/replaced. | |
1350 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1351 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1352 | int register_savevm_live(DeviceState *dev, |
1353 | const char *idstr, | |
a672b469 AL |
1354 | int instance_id, |
1355 | int version_id, | |
7908c78d | 1356 | SaveVMHandlers *ops, |
a672b469 AL |
1357 | void *opaque) |
1358 | { | |
8718e999 | 1359 | SaveStateEntry *se; |
a672b469 | 1360 | |
7267c094 | 1361 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1362 | se->version_id = version_id; |
1363 | se->section_id = global_section_id++; | |
7908c78d | 1364 | se->ops = ops; |
a672b469 | 1365 | se->opaque = opaque; |
9ed7d6ae | 1366 | se->vmsd = NULL; |
24312968 | 1367 | se->no_migrate = 0; |
a7ae8355 | 1368 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1369 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1370 | se->is_ram = 1; |
1371 | } | |
a672b469 | 1372 | |
09e5ab63 AL |
1373 | if (dev) { |
1374 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1375 | if (id) { |
1376 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1377 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1378 | g_free(id); |
7685ee6a | 1379 | |
7267c094 | 1380 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1381 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1382 | se->compat->instance_id = instance_id == -1 ? | |
1383 | calculate_compat_instance_id(idstr) : instance_id; | |
1384 | instance_id = -1; | |
1385 | } | |
1386 | } | |
1387 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1388 | ||
8718e999 | 1389 | if (instance_id == -1) { |
7685ee6a | 1390 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1391 | } else { |
1392 | se->instance_id = instance_id; | |
a672b469 | 1393 | } |
7685ee6a | 1394 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1395 | /* add at the end of list */ |
72cf2d4f | 1396 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1397 | return 0; |
1398 | } | |
1399 | ||
0be71e32 AW |
1400 | int register_savevm(DeviceState *dev, |
1401 | const char *idstr, | |
a672b469 AL |
1402 | int instance_id, |
1403 | int version_id, | |
1404 | SaveStateHandler *save_state, | |
1405 | LoadStateHandler *load_state, | |
1406 | void *opaque) | |
1407 | { | |
7908c78d JQ |
1408 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1409 | ops->save_state = save_state; | |
1410 | ops->load_state = load_state; | |
0be71e32 | 1411 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1412 | ops, opaque); |
a672b469 AL |
1413 | } |
1414 | ||
0be71e32 | 1415 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1416 | { |
8718e999 | 1417 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1418 | char id[256] = ""; |
1419 | ||
09e5ab63 AL |
1420 | if (dev) { |
1421 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1422 | if (path) { |
1423 | pstrcpy(id, sizeof(id), path); | |
1424 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1425 | g_free(path); |
7685ee6a AW |
1426 | } |
1427 | } | |
1428 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1429 | |
72cf2d4f | 1430 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1431 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1432 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1433 | if (se->compat) { |
7267c094 | 1434 | g_free(se->compat); |
69e58af9 | 1435 | } |
22ea40f4 | 1436 | g_free(se->ops); |
7267c094 | 1437 | g_free(se); |
41bd13af | 1438 | } |
41bd13af AL |
1439 | } |
1440 | } | |
1441 | ||
0be71e32 | 1442 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1443 | const VMStateDescription *vmsd, |
1444 | void *opaque, int alias_id, | |
1445 | int required_for_version) | |
9ed7d6ae | 1446 | { |
8718e999 | 1447 | SaveStateEntry *se; |
9ed7d6ae | 1448 | |
4d2ffa08 JK |
1449 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1450 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1451 | ||
7267c094 | 1452 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1453 | se->version_id = vmsd->version_id; |
1454 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1455 | se->opaque = opaque; |
1456 | se->vmsd = vmsd; | |
4d2ffa08 | 1457 | se->alias_id = alias_id; |
2837c8ea | 1458 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1459 | |
09e5ab63 AL |
1460 | if (dev) { |
1461 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1462 | if (id) { |
1463 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1464 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1465 | g_free(id); |
7685ee6a | 1466 | |
7267c094 | 1467 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1468 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1469 | se->compat->instance_id = instance_id == -1 ? | |
1470 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1471 | instance_id = -1; | |
1472 | } | |
1473 | } | |
1474 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1475 | ||
8718e999 | 1476 | if (instance_id == -1) { |
7685ee6a | 1477 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1478 | } else { |
1479 | se->instance_id = instance_id; | |
9ed7d6ae | 1480 | } |
7685ee6a | 1481 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1482 | /* add at the end of list */ |
72cf2d4f | 1483 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1484 | return 0; |
1485 | } | |
1486 | ||
0be71e32 AW |
1487 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1488 | void *opaque) | |
9ed7d6ae | 1489 | { |
1eb7538b JQ |
1490 | SaveStateEntry *se, *new_se; |
1491 | ||
72cf2d4f | 1492 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1493 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1494 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1495 | if (se->compat) { |
7267c094 | 1496 | g_free(se->compat); |
69e58af9 | 1497 | } |
7267c094 | 1498 | g_free(se); |
1eb7538b JQ |
1499 | } |
1500 | } | |
9ed7d6ae JQ |
1501 | } |
1502 | ||
811814bd JQ |
1503 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1504 | void *opaque); | |
1505 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1506 | void *opaque); | |
1507 | ||
9ed7d6ae JQ |
1508 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1509 | void *opaque, int version_id) | |
1510 | { | |
1511 | VMStateField *field = vmsd->fields; | |
811814bd | 1512 | int ret; |
9ed7d6ae JQ |
1513 | |
1514 | if (version_id > vmsd->version_id) { | |
1515 | return -EINVAL; | |
1516 | } | |
1517 | if (version_id < vmsd->minimum_version_id_old) { | |
1518 | return -EINVAL; | |
1519 | } | |
1520 | if (version_id < vmsd->minimum_version_id) { | |
1521 | return vmsd->load_state_old(f, opaque, version_id); | |
1522 | } | |
fd4d52de JQ |
1523 | if (vmsd->pre_load) { |
1524 | int ret = vmsd->pre_load(opaque); | |
1525 | if (ret) | |
1526 | return ret; | |
1527 | } | |
9ed7d6ae | 1528 | while(field->name) { |
f11f6a5f JQ |
1529 | if ((field->field_exists && |
1530 | field->field_exists(opaque, version_id)) || | |
1531 | (!field->field_exists && | |
1532 | field->version_id <= version_id)) { | |
f752a6aa | 1533 | void *base_addr = opaque + field->offset; |
811814bd | 1534 | int i, n_elems = 1; |
e61a1e0a | 1535 | int size = field->size; |
9ed7d6ae | 1536 | |
e61a1e0a JQ |
1537 | if (field->flags & VMS_VBUFFER) { |
1538 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1539 | if (field->flags & VMS_MULTIPLY) { |
1540 | size *= field->size; | |
1541 | } | |
e61a1e0a | 1542 | } |
f752a6aa JQ |
1543 | if (field->flags & VMS_ARRAY) { |
1544 | n_elems = field->num; | |
d6698281 JQ |
1545 | } else if (field->flags & VMS_VARRAY_INT32) { |
1546 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1547 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1548 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1549 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1550 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1551 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1552 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1553 | } |
dde0463b | 1554 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1555 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1556 | } |
f752a6aa | 1557 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1558 | void *addr = base_addr + size * i; |
ec245e21 | 1559 | |
19df438b JQ |
1560 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1561 | addr = *(void **)addr; | |
1562 | } | |
ec245e21 | 1563 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1564 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1565 | } else { |
e61a1e0a | 1566 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1567 | |
1568 | } | |
f752a6aa JQ |
1569 | if (ret < 0) { |
1570 | return ret; | |
1571 | } | |
9ed7d6ae JQ |
1572 | } |
1573 | } | |
1574 | field++; | |
1575 | } | |
811814bd JQ |
1576 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1577 | if (ret != 0) { | |
1578 | return ret; | |
1579 | } | |
752ff2fa | 1580 | if (vmsd->post_load) { |
e59fb374 | 1581 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1582 | } |
9ed7d6ae JQ |
1583 | return 0; |
1584 | } | |
1585 | ||
1586 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1587 | void *opaque) |
9ed7d6ae JQ |
1588 | { |
1589 | VMStateField *field = vmsd->fields; | |
1590 | ||
8fb0791d JQ |
1591 | if (vmsd->pre_save) { |
1592 | vmsd->pre_save(opaque); | |
1593 | } | |
9ed7d6ae | 1594 | while(field->name) { |
f11f6a5f JQ |
1595 | if (!field->field_exists || |
1596 | field->field_exists(opaque, vmsd->version_id)) { | |
1597 | void *base_addr = opaque + field->offset; | |
1598 | int i, n_elems = 1; | |
e61a1e0a | 1599 | int size = field->size; |
dde0463b | 1600 | |
e61a1e0a JQ |
1601 | if (field->flags & VMS_VBUFFER) { |
1602 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1603 | if (field->flags & VMS_MULTIPLY) { |
1604 | size *= field->size; | |
1605 | } | |
e61a1e0a | 1606 | } |
f11f6a5f JQ |
1607 | if (field->flags & VMS_ARRAY) { |
1608 | n_elems = field->num; | |
d6698281 JQ |
1609 | } else if (field->flags & VMS_VARRAY_INT32) { |
1610 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1611 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1612 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1613 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1614 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1615 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1616 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1617 | } |
1618 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1619 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1620 | } |
1621 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1622 | void *addr = base_addr + size * i; |
ec245e21 | 1623 | |
8595387e JQ |
1624 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1625 | addr = *(void **)addr; | |
1626 | } | |
f11f6a5f JQ |
1627 | if (field->flags & VMS_STRUCT) { |
1628 | vmstate_save_state(f, field->vmsd, addr); | |
1629 | } else { | |
e61a1e0a | 1630 | field->info->put(f, addr, size); |
f11f6a5f | 1631 | } |
ec245e21 | 1632 | } |
dde0463b | 1633 | } |
9ed7d6ae JQ |
1634 | field++; |
1635 | } | |
811814bd | 1636 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1637 | } |
1638 | ||
4082be4d JQ |
1639 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1640 | { | |
9ed7d6ae | 1641 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1642 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1643 | } |
1644 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1645 | } |
1646 | ||
dc912121 | 1647 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1648 | { |
9ed7d6ae | 1649 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1650 | se->ops->save_state(f, se->opaque); |
dc912121 | 1651 | return; |
9ed7d6ae JQ |
1652 | } |
1653 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1654 | } |
1655 | ||
a672b469 AL |
1656 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1657 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1658 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1659 | ||
1660 | #define QEMU_VM_EOF 0x00 | |
1661 | #define QEMU_VM_SECTION_START 0x01 | |
1662 | #define QEMU_VM_SECTION_PART 0x02 | |
1663 | #define QEMU_VM_SECTION_END 0x03 | |
1664 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1665 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1666 | |
e1c37d0e | 1667 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1668 | { |
1669 | SaveStateEntry *se; | |
1670 | ||
1671 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1672 | if (se->no_migrate) { | |
e1c37d0e | 1673 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1674 | return true; |
1675 | } | |
1676 | } | |
1677 | return false; | |
1678 | } | |
1679 | ||
47c8c17a PB |
1680 | void qemu_savevm_state_begin(QEMUFile *f, |
1681 | const MigrationParams *params) | |
a672b469 AL |
1682 | { |
1683 | SaveStateEntry *se; | |
39346385 | 1684 | int ret; |
a672b469 | 1685 | |
c163b5ca | 1686 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1687 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1688 | continue; |
6607ae23 | 1689 | } |
22ea40f4 | 1690 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1691 | } |
1692 | ||
a672b469 AL |
1693 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1694 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1695 | ||
72cf2d4f | 1696 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1697 | int len; |
1698 | ||
d1315aac | 1699 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1700 | continue; |
22ea40f4 | 1701 | } |
6bd68781 JQ |
1702 | if (se->ops && se->ops->is_active) { |
1703 | if (!se->ops->is_active(se->opaque)) { | |
1704 | continue; | |
1705 | } | |
1706 | } | |
a672b469 AL |
1707 | /* Section type */ |
1708 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1709 | qemu_put_be32(f, se->section_id); | |
1710 | ||
1711 | /* ID string */ | |
1712 | len = strlen(se->idstr); | |
1713 | qemu_put_byte(f, len); | |
1714 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1715 | ||
1716 | qemu_put_be32(f, se->instance_id); | |
1717 | qemu_put_be32(f, se->version_id); | |
1718 | ||
d1315aac | 1719 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1720 | if (ret < 0) { |
47c8c17a PB |
1721 | qemu_file_set_error(f, ret); |
1722 | break; | |
2975725f | 1723 | } |
a672b469 | 1724 | } |
a672b469 AL |
1725 | } |
1726 | ||
39346385 | 1727 | /* |
07f35073 | 1728 | * this function has three return values: |
39346385 JQ |
1729 | * negative: there was one error, and we have -errno. |
1730 | * 0 : We haven't finished, caller have to go again | |
1731 | * 1 : We have finished, we can go to complete phase | |
1732 | */ | |
539de124 | 1733 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1734 | { |
1735 | SaveStateEntry *se; | |
1736 | int ret = 1; | |
1737 | ||
72cf2d4f | 1738 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1739 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1740 | continue; |
22ea40f4 | 1741 | } |
6bd68781 JQ |
1742 | if (se->ops && se->ops->is_active) { |
1743 | if (!se->ops->is_active(se->opaque)) { | |
1744 | continue; | |
1745 | } | |
1746 | } | |
aac844ed JQ |
1747 | if (qemu_file_rate_limit(f)) { |
1748 | return 0; | |
1749 | } | |
517a13c9 | 1750 | trace_savevm_section_start(); |
a672b469 AL |
1751 | /* Section type */ |
1752 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1753 | qemu_put_be32(f, se->section_id); | |
1754 | ||
16310a3c | 1755 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1756 | trace_savevm_section_end(se->section_id); |
1757 | ||
47c8c17a PB |
1758 | if (ret < 0) { |
1759 | qemu_file_set_error(f, ret); | |
1760 | } | |
2975725f | 1761 | if (ret <= 0) { |
90697be8 JK |
1762 | /* Do not proceed to the next vmstate before this one reported |
1763 | completion of the current stage. This serializes the migration | |
1764 | and reduces the probability that a faster changing state is | |
1765 | synchronized over and over again. */ | |
1766 | break; | |
1767 | } | |
a672b469 | 1768 | } |
39346385 | 1769 | return ret; |
a672b469 AL |
1770 | } |
1771 | ||
47c8c17a | 1772 | void qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1773 | { |
1774 | SaveStateEntry *se; | |
2975725f | 1775 | int ret; |
a672b469 | 1776 | |
ea375f9a JK |
1777 | cpu_synchronize_all_states(); |
1778 | ||
72cf2d4f | 1779 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1780 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1781 | continue; |
22ea40f4 | 1782 | } |
6bd68781 JQ |
1783 | if (se->ops && se->ops->is_active) { |
1784 | if (!se->ops->is_active(se->opaque)) { | |
1785 | continue; | |
1786 | } | |
1787 | } | |
517a13c9 | 1788 | trace_savevm_section_start(); |
a672b469 AL |
1789 | /* Section type */ |
1790 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1791 | qemu_put_be32(f, se->section_id); | |
1792 | ||
16310a3c | 1793 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1794 | trace_savevm_section_end(se->section_id); |
2975725f | 1795 | if (ret < 0) { |
47c8c17a PB |
1796 | qemu_file_set_error(f, ret); |
1797 | return; | |
2975725f | 1798 | } |
a672b469 AL |
1799 | } |
1800 | ||
72cf2d4f | 1801 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1802 | int len; |
1803 | ||
22ea40f4 | 1804 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1805 | continue; |
22ea40f4 | 1806 | } |
517a13c9 | 1807 | trace_savevm_section_start(); |
a672b469 AL |
1808 | /* Section type */ |
1809 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1810 | qemu_put_be32(f, se->section_id); | |
1811 | ||
1812 | /* ID string */ | |
1813 | len = strlen(se->idstr); | |
1814 | qemu_put_byte(f, len); | |
1815 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1816 | ||
1817 | qemu_put_be32(f, se->instance_id); | |
1818 | qemu_put_be32(f, se->version_id); | |
1819 | ||
dc912121 | 1820 | vmstate_save(f, se); |
517a13c9 | 1821 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1822 | } |
1823 | ||
1824 | qemu_put_byte(f, QEMU_VM_EOF); | |
edaae611 | 1825 | qemu_fflush(f); |
a672b469 AL |
1826 | } |
1827 | ||
e4ed1541 JQ |
1828 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1829 | { | |
1830 | SaveStateEntry *se; | |
1831 | uint64_t ret = 0; | |
1832 | ||
1833 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1834 | if (!se->ops || !se->ops->save_live_pending) { | |
1835 | continue; | |
1836 | } | |
1837 | if (se->ops && se->ops->is_active) { | |
1838 | if (!se->ops->is_active(se->opaque)) { | |
1839 | continue; | |
1840 | } | |
1841 | } | |
1842 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1843 | } | |
1844 | return ret; | |
1845 | } | |
1846 | ||
6522773f | 1847 | void qemu_savevm_state_cancel(void) |
4ec7fcc7 JK |
1848 | { |
1849 | SaveStateEntry *se; | |
1850 | ||
1851 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1852 | if (se->ops && se->ops->cancel) { |
1853 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1854 | } |
1855 | } | |
1856 | } | |
1857 | ||
e1c37d0e | 1858 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1859 | { |
a672b469 | 1860 | int ret; |
6607ae23 IY |
1861 | MigrationParams params = { |
1862 | .blk = 0, | |
1863 | .shared = 0 | |
1864 | }; | |
a672b469 | 1865 | |
e1c37d0e | 1866 | if (qemu_savevm_state_blocked(NULL)) { |
04943eba | 1867 | return -EINVAL; |
dc912121 AW |
1868 | } |
1869 | ||
9b095037 | 1870 | qemu_mutex_unlock_iothread(); |
47c8c17a | 1871 | qemu_savevm_state_begin(f, ¶ms); |
9b095037 PB |
1872 | qemu_mutex_lock_iothread(); |
1873 | ||
47c8c17a PB |
1874 | while (qemu_file_get_error(f) == 0) { |
1875 | if (qemu_savevm_state_iterate(f) > 0) { | |
1876 | break; | |
1877 | } | |
1878 | } | |
a672b469 | 1879 | |
47c8c17a | 1880 | ret = qemu_file_get_error(f); |
39346385 | 1881 | if (ret == 0) { |
47c8c17a | 1882 | qemu_savevm_state_complete(f); |
624b9cc2 | 1883 | ret = qemu_file_get_error(f); |
39346385 | 1884 | } |
04943eba PB |
1885 | if (ret != 0) { |
1886 | qemu_savevm_state_cancel(); | |
1887 | } | |
a672b469 AL |
1888 | return ret; |
1889 | } | |
1890 | ||
a7ae8355 SS |
1891 | static int qemu_save_device_state(QEMUFile *f) |
1892 | { | |
1893 | SaveStateEntry *se; | |
1894 | ||
1895 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1896 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1897 | ||
1898 | cpu_synchronize_all_states(); | |
1899 | ||
1900 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1901 | int len; | |
1902 | ||
1903 | if (se->is_ram) { | |
1904 | continue; | |
1905 | } | |
22ea40f4 | 1906 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1907 | continue; |
1908 | } | |
1909 | ||
1910 | /* Section type */ | |
1911 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1912 | qemu_put_be32(f, se->section_id); | |
1913 | ||
1914 | /* ID string */ | |
1915 | len = strlen(se->idstr); | |
1916 | qemu_put_byte(f, len); | |
1917 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1918 | ||
1919 | qemu_put_be32(f, se->instance_id); | |
1920 | qemu_put_be32(f, se->version_id); | |
1921 | ||
1922 | vmstate_save(f, se); | |
1923 | } | |
1924 | ||
1925 | qemu_put_byte(f, QEMU_VM_EOF); | |
1926 | ||
1927 | return qemu_file_get_error(f); | |
1928 | } | |
1929 | ||
a672b469 AL |
1930 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1931 | { | |
1932 | SaveStateEntry *se; | |
1933 | ||
72cf2d4f | 1934 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1935 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1936 | (instance_id == se->instance_id || |
1937 | instance_id == se->alias_id)) | |
a672b469 | 1938 | return se; |
7685ee6a AW |
1939 | /* Migrating from an older version? */ |
1940 | if (strstr(se->idstr, idstr) && se->compat) { | |
1941 | if (!strcmp(se->compat->idstr, idstr) && | |
1942 | (instance_id == se->compat->instance_id || | |
1943 | instance_id == se->alias_id)) | |
1944 | return se; | |
1945 | } | |
a672b469 AL |
1946 | } |
1947 | return NULL; | |
1948 | } | |
1949 | ||
811814bd JQ |
1950 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1951 | { | |
1952 | while(sub && sub->needed) { | |
1953 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1954 | return sub->vmsd; | |
1955 | } | |
1956 | sub++; | |
1957 | } | |
1958 | return NULL; | |
1959 | } | |
1960 | ||
1961 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1962 | void *opaque) | |
1963 | { | |
c6380724 | 1964 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1965 | char idstr[256]; |
1966 | int ret; | |
c6380724 | 1967 | uint8_t version_id, len, size; |
811814bd JQ |
1968 | const VMStateDescription *sub_vmsd; |
1969 | ||
c6380724 JQ |
1970 | len = qemu_peek_byte(f, 1); |
1971 | if (len < strlen(vmsd->name) + 1) { | |
1972 | /* subsection name has be be "section_name/a" */ | |
1973 | return 0; | |
1974 | } | |
1975 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1976 | if (size != len) { | |
1977 | return 0; | |
1978 | } | |
1979 | idstr[size] = 0; | |
811814bd | 1980 | |
c6380724 JQ |
1981 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1982 | /* it don't have a valid subsection name */ | |
1983 | return 0; | |
1984 | } | |
3da9eebd | 1985 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1986 | if (sub_vmsd == NULL) { |
1987 | return -ENOENT; | |
1988 | } | |
c6380724 JQ |
1989 | qemu_file_skip(f, 1); /* subsection */ |
1990 | qemu_file_skip(f, 1); /* len */ | |
1991 | qemu_file_skip(f, len); /* idstr */ | |
1992 | version_id = qemu_get_be32(f); | |
1993 | ||
811814bd JQ |
1994 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1995 | if (ret) { | |
1996 | return ret; | |
1997 | } | |
1998 | } | |
1999 | return 0; | |
2000 | } | |
2001 | ||
2002 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
2003 | void *opaque) | |
2004 | { | |
2005 | const VMStateSubsection *sub = vmsd->subsections; | |
2006 | ||
2007 | while (sub && sub->needed) { | |
2008 | if (sub->needed(opaque)) { | |
2009 | const VMStateDescription *vmsd = sub->vmsd; | |
2010 | uint8_t len; | |
2011 | ||
2012 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
2013 | len = strlen(vmsd->name); | |
2014 | qemu_put_byte(f, len); | |
2015 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
2016 | qemu_put_be32(f, vmsd->version_id); | |
2017 | vmstate_save_state(f, vmsd, opaque); | |
2018 | } | |
2019 | sub++; | |
2020 | } | |
2021 | } | |
2022 | ||
a672b469 | 2023 | typedef struct LoadStateEntry { |
72cf2d4f | 2024 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
2025 | SaveStateEntry *se; |
2026 | int section_id; | |
2027 | int version_id; | |
a672b469 AL |
2028 | } LoadStateEntry; |
2029 | ||
a672b469 AL |
2030 | int qemu_loadvm_state(QEMUFile *f) |
2031 | { | |
72cf2d4f BS |
2032 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
2033 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 2034 | LoadStateEntry *le, *new_le; |
a672b469 AL |
2035 | uint8_t section_type; |
2036 | unsigned int v; | |
2037 | int ret; | |
2038 | ||
e1c37d0e | 2039 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
2040 | return -EINVAL; |
2041 | } | |
2042 | ||
a672b469 AL |
2043 | v = qemu_get_be32(f); |
2044 | if (v != QEMU_VM_FILE_MAGIC) | |
2045 | return -EINVAL; | |
2046 | ||
2047 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
2048 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
2049 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
2050 | return -ENOTSUP; | |
2051 | } | |
a672b469 AL |
2052 | if (v != QEMU_VM_FILE_VERSION) |
2053 | return -ENOTSUP; | |
2054 | ||
2055 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
2056 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
2057 | SaveStateEntry *se; |
2058 | char idstr[257]; | |
2059 | int len; | |
2060 | ||
2061 | switch (section_type) { | |
2062 | case QEMU_VM_SECTION_START: | |
2063 | case QEMU_VM_SECTION_FULL: | |
2064 | /* Read section start */ | |
2065 | section_id = qemu_get_be32(f); | |
2066 | len = qemu_get_byte(f); | |
2067 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
2068 | idstr[len] = 0; | |
2069 | instance_id = qemu_get_be32(f); | |
2070 | version_id = qemu_get_be32(f); | |
2071 | ||
2072 | /* Find savevm section */ | |
2073 | se = find_se(idstr, instance_id); | |
2074 | if (se == NULL) { | |
2075 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
2076 | ret = -EINVAL; | |
2077 | goto out; | |
2078 | } | |
2079 | ||
2080 | /* Validate version */ | |
2081 | if (version_id > se->version_id) { | |
2082 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
2083 | version_id, idstr, se->version_id); | |
2084 | ret = -EINVAL; | |
2085 | goto out; | |
2086 | } | |
2087 | ||
2088 | /* Add entry */ | |
7267c094 | 2089 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
2090 | |
2091 | le->se = se; | |
2092 | le->section_id = section_id; | |
2093 | le->version_id = version_id; | |
72cf2d4f | 2094 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2095 | |
4082be4d | 2096 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2097 | if (ret < 0) { |
2098 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2099 | instance_id, idstr); | |
2100 | goto out; | |
2101 | } | |
a672b469 AL |
2102 | break; |
2103 | case QEMU_VM_SECTION_PART: | |
2104 | case QEMU_VM_SECTION_END: | |
2105 | section_id = qemu_get_be32(f); | |
2106 | ||
72cf2d4f | 2107 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2108 | if (le->section_id == section_id) { |
2109 | break; | |
2110 | } | |
2111 | } | |
a672b469 AL |
2112 | if (le == NULL) { |
2113 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2114 | ret = -EINVAL; | |
2115 | goto out; | |
2116 | } | |
2117 | ||
4082be4d | 2118 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2119 | if (ret < 0) { |
2120 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2121 | section_id); | |
2122 | goto out; | |
2123 | } | |
a672b469 AL |
2124 | break; |
2125 | default: | |
2126 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2127 | ret = -EINVAL; | |
2128 | goto out; | |
2129 | } | |
2130 | } | |
2131 | ||
ea375f9a JK |
2132 | cpu_synchronize_all_post_init(); |
2133 | ||
a672b469 AL |
2134 | ret = 0; |
2135 | ||
2136 | out: | |
72cf2d4f BS |
2137 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2138 | QLIST_REMOVE(le, entry); | |
7267c094 | 2139 | g_free(le); |
a672b469 AL |
2140 | } |
2141 | ||
42802d47 JQ |
2142 | if (ret == 0) { |
2143 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2144 | } |
a672b469 AL |
2145 | |
2146 | return ret; | |
2147 | } | |
2148 | ||
a672b469 AL |
2149 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2150 | const char *name) | |
2151 | { | |
2152 | QEMUSnapshotInfo *sn_tab, *sn; | |
2153 | int nb_sns, i, ret; | |
2154 | ||
2155 | ret = -ENOENT; | |
2156 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2157 | if (nb_sns < 0) | |
2158 | return ret; | |
2159 | for(i = 0; i < nb_sns; i++) { | |
2160 | sn = &sn_tab[i]; | |
2161 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2162 | *sn_info = *sn; | |
2163 | ret = 0; | |
2164 | break; | |
2165 | } | |
2166 | } | |
7267c094 | 2167 | g_free(sn_tab); |
a672b469 AL |
2168 | return ret; |
2169 | } | |
2170 | ||
cb499fb2 KW |
2171 | /* |
2172 | * Deletes snapshots of a given name in all opened images. | |
2173 | */ | |
2174 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2175 | { | |
2176 | BlockDriverState *bs; | |
cb499fb2 KW |
2177 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2178 | int ret; | |
2179 | ||
dbc13590 MA |
2180 | bs = NULL; |
2181 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2182 | if (bdrv_can_snapshot(bs) && |
2183 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2184 | { | |
2185 | ret = bdrv_snapshot_delete(bs, name); | |
2186 | if (ret < 0) { | |
2187 | monitor_printf(mon, | |
2188 | "Error while deleting snapshot on '%s'\n", | |
2189 | bdrv_get_device_name(bs)); | |
2190 | return -1; | |
2191 | } | |
2192 | } | |
2193 | } | |
2194 | ||
2195 | return 0; | |
2196 | } | |
2197 | ||
d54908a5 | 2198 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2199 | { |
2200 | BlockDriverState *bs, *bs1; | |
2201 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2202 | int ret; |
a672b469 AL |
2203 | QEMUFile *f; |
2204 | int saved_vm_running; | |
c2c9a466 | 2205 | uint64_t vm_state_size; |
68b891ec | 2206 | qemu_timeval tv; |
7d631a11 | 2207 | struct tm tm; |
d54908a5 | 2208 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2209 | |
feeee5ac | 2210 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2211 | bs = NULL; |
2212 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2213 | |
07b70bfb | 2214 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2215 | continue; |
2216 | } | |
2217 | ||
2218 | if (!bdrv_can_snapshot(bs)) { | |
2219 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2220 | bdrv_get_device_name(bs)); | |
2221 | return; | |
2222 | } | |
2223 | } | |
2224 | ||
f9092b10 | 2225 | bs = bdrv_snapshots(); |
a672b469 | 2226 | if (!bs) { |
376253ec | 2227 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2228 | return; |
2229 | } | |
a672b469 | 2230 | |
1354869c | 2231 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2232 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2233 | |
cb499fb2 | 2234 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2235 | |
2236 | /* fill auxiliary fields */ | |
68b891ec | 2237 | qemu_gettimeofday(&tv); |
a672b469 AL |
2238 | sn->date_sec = tv.tv_sec; |
2239 | sn->date_nsec = tv.tv_usec * 1000; | |
74475455 | 2240 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2241 | |
7d631a11 MDCF |
2242 | if (name) { |
2243 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2244 | if (ret >= 0) { | |
2245 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2246 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2247 | } else { | |
2248 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2249 | } | |
2250 | } else { | |
d7d9b528 BS |
2251 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2252 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 | 2253 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
7d631a11 MDCF |
2254 | } |
2255 | ||
cb499fb2 | 2256 | /* Delete old snapshots of the same name */ |
f139a412 | 2257 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2258 | goto the_end; |
2259 | } | |
2260 | ||
a672b469 | 2261 | /* save the VM state */ |
45566e9c | 2262 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2263 | if (!f) { |
376253ec | 2264 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2265 | goto the_end; |
2266 | } | |
e1c37d0e | 2267 | ret = qemu_savevm_state(f); |
2d22b18f | 2268 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2269 | qemu_fclose(f); |
2270 | if (ret < 0) { | |
376253ec | 2271 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2272 | goto the_end; |
2273 | } | |
2274 | ||
2275 | /* create the snapshots */ | |
2276 | ||
dbc13590 MA |
2277 | bs1 = NULL; |
2278 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2279 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2280 | /* Write VM state size only to the image that contains the state */ |
2281 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2282 | ret = bdrv_snapshot_create(bs1, sn); |
2283 | if (ret < 0) { | |
376253ec AL |
2284 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2285 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2286 | } |
2287 | } | |
2288 | } | |
2289 | ||
2290 | the_end: | |
2291 | if (saved_vm_running) | |
2292 | vm_start(); | |
2293 | } | |
2294 | ||
a7ae8355 SS |
2295 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2296 | { | |
2297 | QEMUFile *f; | |
2298 | int saved_vm_running; | |
2299 | int ret; | |
2300 | ||
2301 | saved_vm_running = runstate_is_running(); | |
2302 | vm_stop(RUN_STATE_SAVE_VM); | |
2303 | ||
2304 | f = qemu_fopen(filename, "wb"); | |
2305 | if (!f) { | |
2306 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2307 | goto the_end; | |
2308 | } | |
2309 | ret = qemu_save_device_state(f); | |
2310 | qemu_fclose(f); | |
2311 | if (ret < 0) { | |
2312 | error_set(errp, QERR_IO_ERROR); | |
2313 | } | |
2314 | ||
2315 | the_end: | |
2316 | if (saved_vm_running) | |
2317 | vm_start(); | |
a7ae8355 SS |
2318 | } |
2319 | ||
03cd4655 | 2320 | int load_vmstate(const char *name) |
a672b469 | 2321 | { |
f0aa7a8b | 2322 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2323 | QEMUSnapshotInfo sn; |
a672b469 | 2324 | QEMUFile *f; |
751c6a17 | 2325 | int ret; |
a672b469 | 2326 | |
f0aa7a8b MDCF |
2327 | bs_vm_state = bdrv_snapshots(); |
2328 | if (!bs_vm_state) { | |
2329 | error_report("No block device supports snapshots"); | |
2330 | return -ENOTSUP; | |
2331 | } | |
2332 | ||
2333 | /* Don't even try to load empty VM states */ | |
2334 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2335 | if (ret < 0) { | |
2336 | return ret; | |
2337 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2338 | error_report("This is a disk-only snapshot. Revert to it offline " |
2339 | "using qemu-img."); | |
f0aa7a8b MDCF |
2340 | return -EINVAL; |
2341 | } | |
2342 | ||
2343 | /* Verify if there is any device that doesn't support snapshots and is | |
2344 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2345 | bs = NULL; |
2346 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2347 | |
07b70bfb | 2348 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2349 | continue; |
2350 | } | |
2351 | ||
2352 | if (!bdrv_can_snapshot(bs)) { | |
2353 | error_report("Device '%s' is writable but does not support snapshots.", | |
2354 | bdrv_get_device_name(bs)); | |
2355 | return -ENOTSUP; | |
2356 | } | |
feeee5ac | 2357 | |
f0aa7a8b MDCF |
2358 | ret = bdrv_snapshot_find(bs, &sn, name); |
2359 | if (ret < 0) { | |
2360 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2361 | bdrv_get_device_name(bs), name); | |
2362 | return ret; | |
2363 | } | |
a672b469 AL |
2364 | } |
2365 | ||
2366 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2367 | bdrv_drain_all(); |
a672b469 | 2368 | |
f0aa7a8b MDCF |
2369 | bs = NULL; |
2370 | while ((bs = bdrv_next(bs))) { | |
2371 | if (bdrv_can_snapshot(bs)) { | |
2372 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2373 | if (ret < 0) { |
f0aa7a8b MDCF |
2374 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2375 | ret, name, bdrv_get_device_name(bs)); | |
2376 | return ret; | |
a672b469 AL |
2377 | } |
2378 | } | |
2379 | } | |
2380 | ||
a672b469 | 2381 | /* restore the VM state */ |
f0aa7a8b | 2382 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2383 | if (!f) { |
1ecda02b | 2384 | error_report("Could not open VM state file"); |
05f2401e | 2385 | return -EINVAL; |
a672b469 | 2386 | } |
f0aa7a8b | 2387 | |
5a8a49d7 | 2388 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2389 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2390 | |
a672b469 AL |
2391 | qemu_fclose(f); |
2392 | if (ret < 0) { | |
1ecda02b | 2393 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2394 | return ret; |
a672b469 | 2395 | } |
f0aa7a8b | 2396 | |
05f2401e | 2397 | return 0; |
7b630349 JQ |
2398 | } |
2399 | ||
d54908a5 | 2400 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2401 | { |
2402 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2403 | int ret; |
d54908a5 | 2404 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2405 | |
f9092b10 | 2406 | bs = bdrv_snapshots(); |
a672b469 | 2407 | if (!bs) { |
376253ec | 2408 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2409 | return; |
2410 | } | |
2411 | ||
dbc13590 MA |
2412 | bs1 = NULL; |
2413 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2414 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2415 | ret = bdrv_snapshot_delete(bs1, name); |
2416 | if (ret < 0) { | |
2417 | if (ret == -ENOTSUP) | |
376253ec AL |
2418 | monitor_printf(mon, |
2419 | "Snapshots not supported on device '%s'\n", | |
2420 | bdrv_get_device_name(bs1)); | |
a672b469 | 2421 | else |
376253ec AL |
2422 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2423 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2424 | } |
2425 | } | |
2426 | } | |
2427 | } | |
2428 | ||
84f2d0ea | 2429 | void do_info_snapshots(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2430 | { |
2431 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2432 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2433 | int nb_sns, i, ret, available; | |
2434 | int total; | |
2435 | int *available_snapshots; | |
a672b469 AL |
2436 | char buf[256]; |
2437 | ||
f9092b10 | 2438 | bs = bdrv_snapshots(); |
a672b469 | 2439 | if (!bs) { |
376253ec | 2440 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2441 | return; |
2442 | } | |
a672b469 AL |
2443 | |
2444 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2445 | if (nb_sns < 0) { | |
376253ec | 2446 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2447 | return; |
2448 | } | |
f9209915 MDCF |
2449 | |
2450 | if (nb_sns == 0) { | |
2451 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2452 | return; | |
2453 | } | |
2454 | ||
7267c094 | 2455 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2456 | total = 0; |
2457 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2458 | sn = &sn_tab[i]; |
f9209915 MDCF |
2459 | available = 1; |
2460 | bs1 = NULL; | |
2461 | ||
2462 | while ((bs1 = bdrv_next(bs1))) { | |
2463 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2464 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2465 | if (ret < 0) { | |
2466 | available = 0; | |
2467 | break; | |
2468 | } | |
2469 | } | |
2470 | } | |
2471 | ||
2472 | if (available) { | |
2473 | available_snapshots[total] = i; | |
2474 | total++; | |
2475 | } | |
a672b469 | 2476 | } |
f9209915 MDCF |
2477 | |
2478 | if (total > 0) { | |
2479 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2480 | for (i = 0; i < total; i++) { | |
2481 | sn = &sn_tab[available_snapshots[i]]; | |
2482 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2483 | } | |
2484 | } else { | |
2485 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2486 | } | |
2487 | ||
7267c094 AL |
2488 | g_free(sn_tab); |
2489 | g_free(available_snapshots); | |
f9209915 | 2490 | |
a672b469 | 2491 | } |
c5705a77 AK |
2492 | |
2493 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2494 | { | |
1ddde087 | 2495 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2496 | memory_region_name(mr), dev); |
2497 | } | |
2498 | ||
2499 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2500 | { | |
2501 | /* Nothing do to while the implementation is in RAMBlock */ | |
2502 | } | |
2503 | ||
2504 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2505 | { | |
2506 | vmstate_register_ram(mr, NULL); | |
2507 | } |