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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 | |
b3ea2bdb | 117 | #define MAX_IOV_SIZE MIN(IOV_MAX, 64) |
a672b469 AL |
118 | |
119 | struct QEMUFile { | |
9229bf3c | 120 | const QEMUFileOps *ops; |
a672b469 AL |
121 | void *opaque; |
122 | int is_write; | |
123 | ||
1964a397 PB |
124 | int64_t bytes_xfer; |
125 | int64_t xfer_limit; | |
126 | ||
3f2d38fa PB |
127 | int64_t pos; /* start of buffer when writing, end of buffer |
128 | when reading */ | |
a672b469 AL |
129 | int buf_index; |
130 | int buf_size; /* 0 when writing */ | |
131 | uint8_t buf[IO_BUF_SIZE]; | |
132 | ||
b3ea2bdb OW |
133 | struct iovec iov[MAX_IOV_SIZE]; |
134 | unsigned int iovcnt; | |
135 | ||
3961b4dd | 136 | int last_error; |
a672b469 AL |
137 | }; |
138 | ||
7f79dd28 | 139 | typedef struct QEMUFileStdio |
a672b469 | 140 | { |
7f79dd28 | 141 | FILE *stdio_file; |
a672b469 | 142 | QEMUFile *file; |
7f79dd28 | 143 | } QEMUFileStdio; |
a672b469 AL |
144 | |
145 | typedef struct QEMUFileSocket | |
146 | { | |
147 | int fd; | |
148 | QEMUFile *file; | |
149 | } QEMUFileSocket; | |
150 | ||
d7cd3694 SH |
151 | typedef struct { |
152 | Coroutine *co; | |
153 | int fd; | |
154 | } FDYieldUntilData; | |
155 | ||
156 | static void fd_coroutine_enter(void *opaque) | |
157 | { | |
158 | FDYieldUntilData *data = opaque; | |
159 | qemu_set_fd_handler(data->fd, NULL, NULL, NULL); | |
160 | qemu_coroutine_enter(data->co, NULL); | |
161 | } | |
162 | ||
163 | /** | |
164 | * Yield until a file descriptor becomes readable | |
165 | * | |
166 | * Note that this function clobbers the handlers for the file descriptor. | |
167 | */ | |
168 | static void coroutine_fn yield_until_fd_readable(int fd) | |
169 | { | |
170 | FDYieldUntilData data; | |
171 | ||
172 | assert(qemu_in_coroutine()); | |
173 | data.co = qemu_coroutine_self(); | |
174 | data.fd = fd; | |
175 | qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data); | |
176 | qemu_coroutine_yield(); | |
177 | } | |
178 | ||
28085f7b OW |
179 | static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt) |
180 | { | |
181 | QEMUFileSocket *s = opaque; | |
182 | ssize_t len; | |
183 | ssize_t size = iov_size(iov, iovcnt); | |
184 | ||
185 | len = iov_send(s->fd, iov, iovcnt, 0, size); | |
186 | if (len < size) { | |
187 | len = -socket_error(); | |
188 | } | |
189 | return len; | |
190 | } | |
191 | ||
70eb6330 PB |
192 | static int socket_get_fd(void *opaque) |
193 | { | |
194 | QEMUFileSocket *s = opaque; | |
195 | ||
196 | return s->fd; | |
197 | } | |
198 | ||
a672b469 AL |
199 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
200 | { | |
201 | QEMUFileSocket *s = opaque; | |
202 | ssize_t len; | |
203 | ||
595ab641 | 204 | for (;;) { |
00aa0040 | 205 | len = qemu_recv(s->fd, buf, size, 0); |
595ab641 PB |
206 | if (len != -1) { |
207 | break; | |
208 | } | |
209 | if (socket_error() == EAGAIN) { | |
d7cd3694 | 210 | yield_until_fd_readable(s->fd); |
595ab641 PB |
211 | } else if (socket_error() != EINTR) { |
212 | break; | |
213 | } | |
214 | } | |
a672b469 | 215 | |
595ab641 | 216 | if (len == -1) { |
a672b469 | 217 | len = -socket_error(); |
595ab641 | 218 | } |
a672b469 AL |
219 | return len; |
220 | } | |
221 | ||
0cc3f3cc PB |
222 | static int socket_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
223 | { | |
224 | QEMUFileSocket *s = opaque; | |
225 | ssize_t len; | |
226 | ||
227 | len = qemu_send_full(s->fd, buf, size, 0); | |
228 | if (len < size) { | |
229 | len = -socket_error(); | |
230 | } | |
231 | return len; | |
232 | } | |
233 | ||
a672b469 AL |
234 | static int socket_close(void *opaque) |
235 | { | |
236 | QEMUFileSocket *s = opaque; | |
ab52a824 | 237 | closesocket(s->fd); |
7267c094 | 238 | g_free(s); |
a672b469 AL |
239 | return 0; |
240 | } | |
241 | ||
70eb6330 PB |
242 | static int stdio_get_fd(void *opaque) |
243 | { | |
244 | QEMUFileStdio *s = opaque; | |
245 | ||
246 | return fileno(s->stdio_file); | |
247 | } | |
248 | ||
7f79dd28 | 249 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 250 | { |
7f79dd28 PB |
251 | QEMUFileStdio *s = opaque; |
252 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
253 | } |
254 | ||
7f79dd28 | 255 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 256 | { |
7f79dd28 PB |
257 | QEMUFileStdio *s = opaque; |
258 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
259 | int bytes; |
260 | ||
595ab641 | 261 | for (;;) { |
8a67ec4d UL |
262 | clearerr(fp); |
263 | bytes = fread(buf, 1, size, fp); | |
595ab641 PB |
264 | if (bytes != 0 || !ferror(fp)) { |
265 | break; | |
266 | } | |
267 | if (errno == EAGAIN) { | |
d7cd3694 | 268 | yield_until_fd_readable(fileno(fp)); |
595ab641 PB |
269 | } else if (errno != EINTR) { |
270 | break; | |
271 | } | |
272 | } | |
8a67ec4d | 273 | return bytes; |
a672b469 AL |
274 | } |
275 | ||
7f79dd28 PB |
276 | static int stdio_pclose(void *opaque) |
277 | { | |
278 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
279 | int ret; |
280 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
281 | if (ret == -1) { |
282 | ret = -errno; | |
13c7b2da PB |
283 | } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { |
284 | /* close succeeded, but non-zero exit code: */ | |
285 | ret = -EIO; /* fake errno value */ | |
26f1af0a | 286 | } |
7267c094 | 287 | g_free(s); |
41ef56e6 | 288 | return ret; |
7f79dd28 PB |
289 | } |
290 | ||
291 | static int stdio_fclose(void *opaque) | |
a672b469 | 292 | { |
7f79dd28 | 293 | QEMUFileStdio *s = opaque; |
0e286705 | 294 | int ret = 0; |
ce39ee31 PB |
295 | |
296 | if (s->file->ops->put_buffer) { | |
297 | int fd = fileno(s->stdio_file); | |
298 | struct stat st; | |
299 | ||
300 | ret = fstat(fd, &st); | |
301 | if (ret == 0 && S_ISREG(st.st_mode)) { | |
302 | /* | |
303 | * If the file handle is a regular file make sure the | |
304 | * data is flushed to disk before signaling success. | |
305 | */ | |
306 | ret = fsync(fd); | |
307 | if (ret != 0) { | |
308 | ret = -errno; | |
309 | return ret; | |
310 | } | |
311 | } | |
312 | } | |
0e286705 EH |
313 | if (fclose(s->stdio_file) == EOF) { |
314 | ret = -errno; | |
315 | } | |
7267c094 | 316 | g_free(s); |
0e286705 | 317 | return ret; |
a672b469 AL |
318 | } |
319 | ||
9229bf3c | 320 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 321 | .get_fd = stdio_get_fd, |
9229bf3c PB |
322 | .get_buffer = stdio_get_buffer, |
323 | .close = stdio_pclose | |
324 | }; | |
325 | ||
326 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 327 | .get_fd = stdio_get_fd, |
9229bf3c PB |
328 | .put_buffer = stdio_put_buffer, |
329 | .close = stdio_pclose | |
330 | }; | |
331 | ||
817b9ed5 | 332 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
a672b469 | 333 | { |
817b9ed5 | 334 | FILE *stdio_file; |
7f79dd28 | 335 | QEMUFileStdio *s; |
a672b469 | 336 | |
817b9ed5 PB |
337 | stdio_file = popen(command, mode); |
338 | if (stdio_file == NULL) { | |
339 | return NULL; | |
340 | } | |
341 | ||
342 | if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { | |
a672b469 AL |
343 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
344 | return NULL; | |
345 | } | |
346 | ||
7267c094 | 347 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 348 | |
7f79dd28 | 349 | s->stdio_file = stdio_file; |
a672b469 AL |
350 | |
351 | if(mode[0] == 'r') { | |
9229bf3c | 352 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 353 | } else { |
9229bf3c | 354 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 355 | } |
a672b469 AL |
356 | return s->file; |
357 | } | |
358 | ||
9229bf3c | 359 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 360 | .get_fd = stdio_get_fd, |
9229bf3c PB |
361 | .get_buffer = stdio_get_buffer, |
362 | .close = stdio_fclose | |
363 | }; | |
364 | ||
365 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 366 | .get_fd = stdio_get_fd, |
9229bf3c PB |
367 | .put_buffer = stdio_put_buffer, |
368 | .close = stdio_fclose | |
369 | }; | |
370 | ||
5ac1fad3 PB |
371 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
372 | { | |
373 | QEMUFileStdio *s; | |
374 | ||
375 | if (mode == NULL || | |
376 | (mode[0] != 'r' && mode[0] != 'w') || | |
377 | mode[1] != 'b' || mode[2] != 0) { | |
378 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
379 | return NULL; | |
380 | } | |
381 | ||
7267c094 | 382 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
383 | s->stdio_file = fdopen(fd, mode); |
384 | if (!s->stdio_file) | |
385 | goto fail; | |
386 | ||
387 | if(mode[0] == 'r') { | |
9229bf3c | 388 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 389 | } else { |
9229bf3c | 390 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
391 | } |
392 | return s->file; | |
393 | ||
394 | fail: | |
7267c094 | 395 | g_free(s); |
5ac1fad3 PB |
396 | return NULL; |
397 | } | |
398 | ||
9229bf3c | 399 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 400 | .get_fd = socket_get_fd, |
9229bf3c PB |
401 | .get_buffer = socket_get_buffer, |
402 | .close = socket_close | |
403 | }; | |
404 | ||
0cc3f3cc PB |
405 | static const QEMUFileOps socket_write_ops = { |
406 | .get_fd = socket_get_fd, | |
407 | .put_buffer = socket_put_buffer, | |
28085f7b | 408 | .writev_buffer = socket_writev_buffer, |
0cc3f3cc PB |
409 | .close = socket_close |
410 | }; | |
411 | ||
412 | QEMUFile *qemu_fopen_socket(int fd, const char *mode) | |
a672b469 | 413 | { |
7267c094 | 414 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 415 | |
0cc3f3cc PB |
416 | if (mode == NULL || |
417 | (mode[0] != 'r' && mode[0] != 'w') || | |
418 | mode[1] != 'b' || mode[2] != 0) { | |
419 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); | |
420 | return NULL; | |
421 | } | |
422 | ||
a672b469 | 423 | s->fd = fd; |
0cc3f3cc | 424 | if (mode[0] == 'w') { |
f8bbc128 | 425 | socket_set_block(s->fd); |
0cc3f3cc PB |
426 | s->file = qemu_fopen_ops(s, &socket_write_ops); |
427 | } else { | |
428 | s->file = qemu_fopen_ops(s, &socket_read_ops); | |
429 | } | |
a672b469 AL |
430 | return s->file; |
431 | } | |
432 | ||
a672b469 AL |
433 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
434 | { | |
435 | QEMUFileStdio *s; | |
436 | ||
7f79dd28 PB |
437 | if (mode == NULL || |
438 | (mode[0] != 'r' && mode[0] != 'w') || | |
439 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 440 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
441 | return NULL; |
442 | } | |
443 | ||
7267c094 | 444 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 445 | |
7f79dd28 PB |
446 | s->stdio_file = fopen(filename, mode); |
447 | if (!s->stdio_file) | |
a672b469 | 448 | goto fail; |
c163b5ca | 449 | |
7f79dd28 | 450 | if(mode[0] == 'w') { |
9229bf3c | 451 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 452 | } else { |
9229bf3c | 453 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
454 | } |
455 | return s->file; | |
a672b469 | 456 | fail: |
7267c094 | 457 | g_free(s); |
a672b469 AL |
458 | return NULL; |
459 | } | |
460 | ||
178e08a5 | 461 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
462 | int64_t pos, int size) |
463 | { | |
45566e9c | 464 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
465 | return size; |
466 | } | |
467 | ||
178e08a5 | 468 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 469 | { |
45566e9c | 470 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
471 | } |
472 | ||
473 | static int bdrv_fclose(void *opaque) | |
474 | { | |
ad492c92 | 475 | return bdrv_flush(opaque); |
a672b469 AL |
476 | } |
477 | ||
9229bf3c PB |
478 | static const QEMUFileOps bdrv_read_ops = { |
479 | .get_buffer = block_get_buffer, | |
480 | .close = bdrv_fclose | |
481 | }; | |
482 | ||
483 | static const QEMUFileOps bdrv_write_ops = { | |
484 | .put_buffer = block_put_buffer, | |
485 | .close = bdrv_fclose | |
486 | }; | |
487 | ||
45566e9c | 488 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 489 | { |
a672b469 | 490 | if (is_writable) |
9229bf3c PB |
491 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
492 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
493 | } |
494 | ||
9229bf3c | 495 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
496 | { |
497 | QEMUFile *f; | |
498 | ||
7267c094 | 499 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
500 | |
501 | f->opaque = opaque; | |
9229bf3c | 502 | f->ops = ops; |
a672b469 | 503 | f->is_write = 0; |
a672b469 AL |
504 | return f; |
505 | } | |
506 | ||
624b9cc2 | 507 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 508 | { |
3961b4dd | 509 | return f->last_error; |
a672b469 AL |
510 | } |
511 | ||
05f28b83 | 512 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 513 | { |
afe41931 JQ |
514 | if (f->last_error == 0) { |
515 | f->last_error = ret; | |
516 | } | |
4dabe248 AL |
517 | } |
518 | ||
d82ca915 EH |
519 | /** Flushes QEMUFile buffer |
520 | * | |
d82ca915 | 521 | */ |
05f28b83 | 522 | static void qemu_fflush(QEMUFile *f) |
a672b469 | 523 | { |
7311bea3 JQ |
524 | int ret = 0; |
525 | ||
93bf2104 PB |
526 | if (!f->ops->put_buffer) { |
527 | return; | |
528 | } | |
a672b469 | 529 | if (f->is_write && f->buf_index > 0) { |
3f2d38fa | 530 | ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index); |
7311bea3 | 531 | if (ret >= 0) { |
3f2d38fa | 532 | f->pos += f->buf_index; |
7311bea3 | 533 | } |
a672b469 | 534 | f->buf_index = 0; |
b3ea2bdb | 535 | f->iovcnt = 0; |
a672b469 | 536 | } |
93bf2104 PB |
537 | if (ret < 0) { |
538 | qemu_file_set_error(f, ret); | |
539 | } | |
a672b469 AL |
540 | } |
541 | ||
542 | static void qemu_fill_buffer(QEMUFile *f) | |
543 | { | |
544 | int len; | |
0046c45b | 545 | int pending; |
a672b469 | 546 | |
9229bf3c | 547 | if (!f->ops->get_buffer) |
a672b469 AL |
548 | return; |
549 | ||
550 | if (f->is_write) | |
551 | abort(); | |
552 | ||
0046c45b JQ |
553 | pending = f->buf_size - f->buf_index; |
554 | if (pending > 0) { | |
555 | memmove(f->buf, f->buf + f->buf_index, pending); | |
556 | } | |
557 | f->buf_index = 0; | |
558 | f->buf_size = pending; | |
559 | ||
3f2d38fa | 560 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, |
0046c45b | 561 | IO_BUF_SIZE - pending); |
a672b469 | 562 | if (len > 0) { |
0046c45b | 563 | f->buf_size += len; |
3f2d38fa | 564 | f->pos += len; |
fa39a30f | 565 | } else if (len == 0) { |
02c4a051 | 566 | qemu_file_set_error(f, -EIO); |
a672b469 | 567 | } else if (len != -EAGAIN) |
c29110d5 | 568 | qemu_file_set_error(f, len); |
a672b469 AL |
569 | } |
570 | ||
70eb6330 PB |
571 | int qemu_get_fd(QEMUFile *f) |
572 | { | |
573 | if (f->ops->get_fd) { | |
574 | return f->ops->get_fd(f->opaque); | |
575 | } | |
576 | return -1; | |
577 | } | |
578 | ||
d82ca915 EH |
579 | /** Closes the file |
580 | * | |
581 | * Returns negative error value if any error happened on previous operations or | |
582 | * while closing the file. Returns 0 or positive number on success. | |
583 | * | |
584 | * The meaning of return value on success depends on the specific backend | |
585 | * being used. | |
586 | */ | |
587 | int qemu_fclose(QEMUFile *f) | |
588 | { | |
29eee86f | 589 | int ret; |
93bf2104 PB |
590 | qemu_fflush(f); |
591 | ret = qemu_file_get_error(f); | |
7311bea3 | 592 | |
9229bf3c PB |
593 | if (f->ops->close) { |
594 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
595 | if (ret >= 0) { |
596 | ret = ret2; | |
597 | } | |
7311bea3 | 598 | } |
d82ca915 EH |
599 | /* If any error was spotted before closing, we should report it |
600 | * instead of the close() return value. | |
601 | */ | |
602 | if (f->last_error) { | |
603 | ret = f->last_error; | |
604 | } | |
7267c094 | 605 | g_free(f); |
a672b469 AL |
606 | return ret; |
607 | } | |
608 | ||
b3ea2bdb OW |
609 | static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size) |
610 | { | |
611 | /* check for adjacent buffer and coalesce them */ | |
612 | if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base + | |
613 | f->iov[f->iovcnt - 1].iov_len) { | |
614 | f->iov[f->iovcnt - 1].iov_len += size; | |
615 | } else { | |
616 | f->iov[f->iovcnt].iov_base = (uint8_t *)buf; | |
617 | f->iov[f->iovcnt++].iov_len = size; | |
618 | } | |
619 | } | |
620 | ||
a672b469 AL |
621 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
622 | { | |
623 | int l; | |
624 | ||
c10682cb JQ |
625 | if (f->last_error) { |
626 | return; | |
627 | } | |
628 | ||
629 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
630 | fprintf(stderr, |
631 | "Attempted to write to buffer while read buffer is not empty\n"); | |
632 | abort(); | |
633 | } | |
634 | ||
c10682cb | 635 | while (size > 0) { |
a672b469 AL |
636 | l = IO_BUF_SIZE - f->buf_index; |
637 | if (l > size) | |
638 | l = size; | |
639 | memcpy(f->buf + f->buf_index, buf, l); | |
b3ea2bdb | 640 | add_to_iovec(f, f->buf + f->buf_index, l); |
a672b469 AL |
641 | f->is_write = 1; |
642 | f->buf_index += l; | |
1964a397 | 643 | f->bytes_xfer += l; |
a672b469 AL |
644 | buf += l; |
645 | size -= l; | |
b3ea2bdb | 646 | if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) { |
93bf2104 PB |
647 | qemu_fflush(f); |
648 | if (qemu_file_get_error(f)) { | |
c10682cb JQ |
649 | break; |
650 | } | |
7311bea3 | 651 | } |
a672b469 AL |
652 | } |
653 | } | |
654 | ||
655 | void qemu_put_byte(QEMUFile *f, int v) | |
656 | { | |
c10682cb JQ |
657 | if (f->last_error) { |
658 | return; | |
659 | } | |
660 | ||
661 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
662 | fprintf(stderr, |
663 | "Attempted to write to buffer while read buffer is not empty\n"); | |
664 | abort(); | |
665 | } | |
666 | ||
667 | f->buf[f->buf_index++] = v; | |
668 | f->is_write = 1; | |
7d8a30bb OW |
669 | f->bytes_xfer++; |
670 | ||
b3ea2bdb OW |
671 | add_to_iovec(f, f->buf + (f->buf_index - 1), 1); |
672 | ||
673 | if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) { | |
93bf2104 | 674 | qemu_fflush(f); |
7311bea3 | 675 | } |
a672b469 AL |
676 | } |
677 | ||
c6380724 | 678 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 679 | { |
c6380724 JQ |
680 | if (f->buf_index + size <= f->buf_size) { |
681 | f->buf_index += size; | |
682 | } | |
683 | } | |
684 | ||
685 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 686 | { |
c6380724 JQ |
687 | int pending; |
688 | int index; | |
a672b469 | 689 | |
b9ce1454 | 690 | if (f->is_write) { |
a672b469 | 691 | abort(); |
b9ce1454 | 692 | } |
a672b469 | 693 | |
c6380724 JQ |
694 | index = f->buf_index + offset; |
695 | pending = f->buf_size - index; | |
696 | if (pending < size) { | |
697 | qemu_fill_buffer(f); | |
698 | index = f->buf_index + offset; | |
699 | pending = f->buf_size - index; | |
700 | } | |
701 | ||
702 | if (pending <= 0) { | |
703 | return 0; | |
704 | } | |
705 | if (size > pending) { | |
706 | size = pending; | |
707 | } | |
708 | ||
709 | memcpy(buf, f->buf + index, size); | |
710 | return size; | |
711 | } | |
712 | ||
713 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
714 | { | |
715 | int pending = size; | |
716 | int done = 0; | |
717 | ||
718 | while (pending > 0) { | |
719 | int res; | |
720 | ||
721 | res = qemu_peek_buffer(f, buf, pending, 0); | |
722 | if (res == 0) { | |
723 | return done; | |
a672b469 | 724 | } |
c6380724 JQ |
725 | qemu_file_skip(f, res); |
726 | buf += res; | |
727 | pending -= res; | |
728 | done += res; | |
a672b469 | 729 | } |
c6380724 | 730 | return done; |
a672b469 AL |
731 | } |
732 | ||
c6380724 | 733 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 734 | { |
c6380724 JQ |
735 | int index = f->buf_index + offset; |
736 | ||
b9ce1454 | 737 | if (f->is_write) { |
811814bd | 738 | abort(); |
b9ce1454 | 739 | } |
811814bd | 740 | |
c6380724 | 741 | if (index >= f->buf_size) { |
811814bd | 742 | qemu_fill_buffer(f); |
c6380724 JQ |
743 | index = f->buf_index + offset; |
744 | if (index >= f->buf_size) { | |
811814bd | 745 | return 0; |
b9ce1454 | 746 | } |
811814bd | 747 | } |
c6380724 | 748 | return f->buf[index]; |
811814bd JQ |
749 | } |
750 | ||
a672b469 AL |
751 | int qemu_get_byte(QEMUFile *f) |
752 | { | |
65f3bb3d | 753 | int result; |
a672b469 | 754 | |
c6380724 JQ |
755 | result = qemu_peek_byte(f, 0); |
756 | qemu_file_skip(f, 1); | |
65f3bb3d | 757 | return result; |
a672b469 AL |
758 | } |
759 | ||
ad55ab42 | 760 | int64_t qemu_ftell(QEMUFile *f) |
a672b469 | 761 | { |
3f2d38fa PB |
762 | qemu_fflush(f); |
763 | return f->pos; | |
a672b469 AL |
764 | } |
765 | ||
a672b469 AL |
766 | int qemu_file_rate_limit(QEMUFile *f) |
767 | { | |
1964a397 PB |
768 | if (qemu_file_get_error(f)) { |
769 | return 1; | |
770 | } | |
771 | if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { | |
772 | return 1; | |
773 | } | |
a672b469 AL |
774 | return 0; |
775 | } | |
776 | ||
3d002df3 | 777 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 778 | { |
1964a397 | 779 | return f->xfer_limit; |
c163b5ca | 780 | } |
781 | ||
1964a397 | 782 | void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) |
19629537 | 783 | { |
1964a397 PB |
784 | f->xfer_limit = limit; |
785 | } | |
19629537 | 786 | |
1964a397 PB |
787 | void qemu_file_reset_rate_limit(QEMUFile *f) |
788 | { | |
789 | f->bytes_xfer = 0; | |
19629537 GC |
790 | } |
791 | ||
a672b469 AL |
792 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
793 | { | |
794 | qemu_put_byte(f, v >> 8); | |
795 | qemu_put_byte(f, v); | |
796 | } | |
797 | ||
798 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
799 | { | |
800 | qemu_put_byte(f, v >> 24); | |
801 | qemu_put_byte(f, v >> 16); | |
802 | qemu_put_byte(f, v >> 8); | |
803 | qemu_put_byte(f, v); | |
804 | } | |
805 | ||
806 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
807 | { | |
808 | qemu_put_be32(f, v >> 32); | |
809 | qemu_put_be32(f, v); | |
810 | } | |
811 | ||
812 | unsigned int qemu_get_be16(QEMUFile *f) | |
813 | { | |
814 | unsigned int v; | |
815 | v = qemu_get_byte(f) << 8; | |
816 | v |= qemu_get_byte(f); | |
817 | return v; | |
818 | } | |
819 | ||
820 | unsigned int qemu_get_be32(QEMUFile *f) | |
821 | { | |
822 | unsigned int v; | |
823 | v = qemu_get_byte(f) << 24; | |
824 | v |= qemu_get_byte(f) << 16; | |
825 | v |= qemu_get_byte(f) << 8; | |
826 | v |= qemu_get_byte(f); | |
827 | return v; | |
828 | } | |
829 | ||
830 | uint64_t qemu_get_be64(QEMUFile *f) | |
831 | { | |
832 | uint64_t v; | |
833 | v = (uint64_t)qemu_get_be32(f) << 32; | |
834 | v |= qemu_get_be32(f); | |
835 | return v; | |
836 | } | |
837 | ||
2ff68d07 PB |
838 | |
839 | /* timer */ | |
840 | ||
841 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
842 | { | |
843 | uint64_t expire_time; | |
844 | ||
845 | expire_time = qemu_timer_expire_time_ns(ts); | |
846 | qemu_put_be64(f, expire_time); | |
847 | } | |
848 | ||
849 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
850 | { | |
851 | uint64_t expire_time; | |
852 | ||
853 | expire_time = qemu_get_be64(f); | |
854 | if (expire_time != -1) { | |
855 | qemu_mod_timer_ns(ts, expire_time); | |
856 | } else { | |
857 | qemu_del_timer(ts); | |
858 | } | |
859 | } | |
860 | ||
861 | ||
cdae5cfb GH |
862 | /* bool */ |
863 | ||
864 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
865 | { | |
866 | bool *v = pv; | |
867 | *v = qemu_get_byte(f); | |
868 | return 0; | |
869 | } | |
870 | ||
871 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
872 | { | |
873 | bool *v = pv; | |
874 | qemu_put_byte(f, *v); | |
875 | } | |
876 | ||
877 | const VMStateInfo vmstate_info_bool = { | |
878 | .name = "bool", | |
879 | .get = get_bool, | |
880 | .put = put_bool, | |
881 | }; | |
882 | ||
9ed7d6ae JQ |
883 | /* 8 bit int */ |
884 | ||
885 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
886 | { | |
887 | int8_t *v = pv; | |
888 | qemu_get_s8s(f, v); | |
889 | return 0; | |
890 | } | |
891 | ||
84e2e3eb | 892 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 893 | { |
84e2e3eb | 894 | int8_t *v = pv; |
9ed7d6ae JQ |
895 | qemu_put_s8s(f, v); |
896 | } | |
897 | ||
898 | const VMStateInfo vmstate_info_int8 = { | |
899 | .name = "int8", | |
900 | .get = get_int8, | |
901 | .put = put_int8, | |
902 | }; | |
903 | ||
904 | /* 16 bit int */ | |
905 | ||
906 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
907 | { | |
908 | int16_t *v = pv; | |
909 | qemu_get_sbe16s(f, v); | |
910 | return 0; | |
911 | } | |
912 | ||
84e2e3eb | 913 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 914 | { |
84e2e3eb | 915 | int16_t *v = pv; |
9ed7d6ae JQ |
916 | qemu_put_sbe16s(f, v); |
917 | } | |
918 | ||
919 | const VMStateInfo vmstate_info_int16 = { | |
920 | .name = "int16", | |
921 | .get = get_int16, | |
922 | .put = put_int16, | |
923 | }; | |
924 | ||
925 | /* 32 bit int */ | |
926 | ||
927 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
928 | { | |
929 | int32_t *v = pv; | |
930 | qemu_get_sbe32s(f, v); | |
931 | return 0; | |
932 | } | |
933 | ||
84e2e3eb | 934 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 935 | { |
84e2e3eb | 936 | int32_t *v = pv; |
9ed7d6ae JQ |
937 | qemu_put_sbe32s(f, v); |
938 | } | |
939 | ||
940 | const VMStateInfo vmstate_info_int32 = { | |
941 | .name = "int32", | |
942 | .get = get_int32, | |
943 | .put = put_int32, | |
944 | }; | |
945 | ||
82501660 JQ |
946 | /* 32 bit int. See that the received value is the same than the one |
947 | in the field */ | |
948 | ||
949 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
950 | { | |
951 | int32_t *v = pv; | |
952 | int32_t v2; | |
953 | qemu_get_sbe32s(f, &v2); | |
954 | ||
955 | if (*v == v2) | |
956 | return 0; | |
957 | return -EINVAL; | |
958 | } | |
959 | ||
960 | const VMStateInfo vmstate_info_int32_equal = { | |
961 | .name = "int32 equal", | |
962 | .get = get_int32_equal, | |
963 | .put = put_int32, | |
964 | }; | |
965 | ||
0a031e0a JQ |
966 | /* 32 bit int. See that the received value is the less or the same |
967 | than the one in the field */ | |
968 | ||
969 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
970 | { | |
971 | int32_t *old = pv; | |
972 | int32_t new; | |
973 | qemu_get_sbe32s(f, &new); | |
974 | ||
975 | if (*old <= new) | |
976 | return 0; | |
977 | return -EINVAL; | |
978 | } | |
979 | ||
980 | const VMStateInfo vmstate_info_int32_le = { | |
981 | .name = "int32 equal", | |
982 | .get = get_int32_le, | |
983 | .put = put_int32, | |
984 | }; | |
985 | ||
9ed7d6ae JQ |
986 | /* 64 bit int */ |
987 | ||
988 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
989 | { | |
990 | int64_t *v = pv; | |
991 | qemu_get_sbe64s(f, v); | |
992 | return 0; | |
993 | } | |
994 | ||
84e2e3eb | 995 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 996 | { |
84e2e3eb | 997 | int64_t *v = pv; |
9ed7d6ae JQ |
998 | qemu_put_sbe64s(f, v); |
999 | } | |
1000 | ||
1001 | const VMStateInfo vmstate_info_int64 = { | |
1002 | .name = "int64", | |
1003 | .get = get_int64, | |
1004 | .put = put_int64, | |
1005 | }; | |
1006 | ||
1007 | /* 8 bit unsigned int */ | |
1008 | ||
1009 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
1010 | { | |
1011 | uint8_t *v = pv; | |
1012 | qemu_get_8s(f, v); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
84e2e3eb | 1016 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1017 | { |
84e2e3eb | 1018 | uint8_t *v = pv; |
9ed7d6ae JQ |
1019 | qemu_put_8s(f, v); |
1020 | } | |
1021 | ||
1022 | const VMStateInfo vmstate_info_uint8 = { | |
1023 | .name = "uint8", | |
1024 | .get = get_uint8, | |
1025 | .put = put_uint8, | |
1026 | }; | |
1027 | ||
1028 | /* 16 bit unsigned int */ | |
1029 | ||
1030 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
1031 | { | |
1032 | uint16_t *v = pv; | |
1033 | qemu_get_be16s(f, v); | |
1034 | return 0; | |
1035 | } | |
1036 | ||
84e2e3eb | 1037 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1038 | { |
84e2e3eb | 1039 | uint16_t *v = pv; |
9ed7d6ae JQ |
1040 | qemu_put_be16s(f, v); |
1041 | } | |
1042 | ||
1043 | const VMStateInfo vmstate_info_uint16 = { | |
1044 | .name = "uint16", | |
1045 | .get = get_uint16, | |
1046 | .put = put_uint16, | |
1047 | }; | |
1048 | ||
1049 | /* 32 bit unsigned int */ | |
1050 | ||
1051 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
1052 | { | |
1053 | uint32_t *v = pv; | |
1054 | qemu_get_be32s(f, v); | |
1055 | return 0; | |
1056 | } | |
1057 | ||
84e2e3eb | 1058 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1059 | { |
84e2e3eb | 1060 | uint32_t *v = pv; |
9ed7d6ae JQ |
1061 | qemu_put_be32s(f, v); |
1062 | } | |
1063 | ||
1064 | const VMStateInfo vmstate_info_uint32 = { | |
1065 | .name = "uint32", | |
1066 | .get = get_uint32, | |
1067 | .put = put_uint32, | |
1068 | }; | |
1069 | ||
9122a8fe JQ |
1070 | /* 32 bit uint. See that the received value is the same than the one |
1071 | in the field */ | |
1072 | ||
1073 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1074 | { | |
1075 | uint32_t *v = pv; | |
1076 | uint32_t v2; | |
1077 | qemu_get_be32s(f, &v2); | |
1078 | ||
1079 | if (*v == v2) { | |
1080 | return 0; | |
1081 | } | |
1082 | return -EINVAL; | |
1083 | } | |
1084 | ||
1085 | const VMStateInfo vmstate_info_uint32_equal = { | |
1086 | .name = "uint32 equal", | |
1087 | .get = get_uint32_equal, | |
1088 | .put = put_uint32, | |
1089 | }; | |
1090 | ||
9ed7d6ae JQ |
1091 | /* 64 bit unsigned int */ |
1092 | ||
1093 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1094 | { | |
1095 | uint64_t *v = pv; | |
1096 | qemu_get_be64s(f, v); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
84e2e3eb | 1100 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1101 | { |
84e2e3eb | 1102 | uint64_t *v = pv; |
9ed7d6ae JQ |
1103 | qemu_put_be64s(f, v); |
1104 | } | |
1105 | ||
1106 | const VMStateInfo vmstate_info_uint64 = { | |
1107 | .name = "uint64", | |
1108 | .get = get_uint64, | |
1109 | .put = put_uint64, | |
1110 | }; | |
1111 | ||
e344b8a1 DG |
1112 | /* 64 bit unsigned int. See that the received value is the same than the one |
1113 | in the field */ | |
1114 | ||
1115 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) | |
1116 | { | |
1117 | uint64_t *v = pv; | |
1118 | uint64_t v2; | |
1119 | qemu_get_be64s(f, &v2); | |
1120 | ||
1121 | if (*v == v2) { | |
1122 | return 0; | |
1123 | } | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
1127 | const VMStateInfo vmstate_info_uint64_equal = { | |
1128 | .name = "int64 equal", | |
1129 | .get = get_uint64_equal, | |
1130 | .put = put_uint64, | |
1131 | }; | |
1132 | ||
80cd83e7 JQ |
1133 | /* 8 bit int. See that the received value is the same than the one |
1134 | in the field */ | |
1135 | ||
1136 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1137 | { | |
1138 | uint8_t *v = pv; | |
1139 | uint8_t v2; | |
1140 | qemu_get_8s(f, &v2); | |
1141 | ||
1142 | if (*v == v2) | |
1143 | return 0; | |
1144 | return -EINVAL; | |
1145 | } | |
1146 | ||
1147 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1148 | .name = "uint8 equal", |
80cd83e7 JQ |
1149 | .get = get_uint8_equal, |
1150 | .put = put_uint8, | |
1151 | }; | |
1152 | ||
dc3b83a0 JQ |
1153 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1154 | in the field */ | |
1155 | ||
1156 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1157 | { | |
1158 | uint16_t *v = pv; | |
1159 | uint16_t v2; | |
1160 | qemu_get_be16s(f, &v2); | |
1161 | ||
1162 | if (*v == v2) | |
1163 | return 0; | |
1164 | return -EINVAL; | |
1165 | } | |
1166 | ||
1167 | const VMStateInfo vmstate_info_uint16_equal = { | |
1168 | .name = "uint16 equal", | |
1169 | .get = get_uint16_equal, | |
1170 | .put = put_uint16, | |
1171 | }; | |
1172 | ||
213945e4 DG |
1173 | /* floating point */ |
1174 | ||
1175 | static int get_float64(QEMUFile *f, void *pv, size_t size) | |
1176 | { | |
1177 | float64 *v = pv; | |
1178 | ||
1179 | *v = make_float64(qemu_get_be64(f)); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static void put_float64(QEMUFile *f, void *pv, size_t size) | |
1184 | { | |
1185 | uint64_t *v = pv; | |
1186 | ||
1187 | qemu_put_be64(f, float64_val(*v)); | |
1188 | } | |
1189 | ||
1190 | const VMStateInfo vmstate_info_float64 = { | |
1191 | .name = "float64", | |
1192 | .get = get_float64, | |
1193 | .put = put_float64, | |
1194 | }; | |
1195 | ||
dde0463b JQ |
1196 | /* timers */ |
1197 | ||
1198 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1199 | { | |
1200 | QEMUTimer *v = pv; | |
1201 | qemu_get_timer(f, v); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
84e2e3eb | 1205 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1206 | { |
84e2e3eb | 1207 | QEMUTimer *v = pv; |
dde0463b JQ |
1208 | qemu_put_timer(f, v); |
1209 | } | |
1210 | ||
1211 | const VMStateInfo vmstate_info_timer = { | |
1212 | .name = "timer", | |
1213 | .get = get_timer, | |
1214 | .put = put_timer, | |
1215 | }; | |
1216 | ||
6f67c50f JQ |
1217 | /* uint8_t buffers */ |
1218 | ||
1219 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1220 | { | |
1221 | uint8_t *v = pv; | |
1222 | qemu_get_buffer(f, v, size); | |
1223 | return 0; | |
1224 | } | |
1225 | ||
84e2e3eb | 1226 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1227 | { |
84e2e3eb | 1228 | uint8_t *v = pv; |
6f67c50f JQ |
1229 | qemu_put_buffer(f, v, size); |
1230 | } | |
1231 | ||
1232 | const VMStateInfo vmstate_info_buffer = { | |
1233 | .name = "buffer", | |
1234 | .get = get_buffer, | |
1235 | .put = put_buffer, | |
1236 | }; | |
1237 | ||
76507c75 | 1238 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1239 | not useful anymore */ |
76507c75 JQ |
1240 | |
1241 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1242 | { | |
21174c34 JK |
1243 | uint8_t buf[1024]; |
1244 | int block_len; | |
1245 | ||
1246 | while (size > 0) { | |
1247 | block_len = MIN(sizeof(buf), size); | |
1248 | size -= block_len; | |
1249 | qemu_get_buffer(f, buf, block_len); | |
1250 | } | |
1251 | return 0; | |
76507c75 JQ |
1252 | } |
1253 | ||
1254 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1255 | { | |
21174c34 JK |
1256 | static const uint8_t buf[1024]; |
1257 | int block_len; | |
1258 | ||
1259 | while (size > 0) { | |
1260 | block_len = MIN(sizeof(buf), size); | |
1261 | size -= block_len; | |
1262 | qemu_put_buffer(f, buf, block_len); | |
1263 | } | |
76507c75 JQ |
1264 | } |
1265 | ||
1266 | const VMStateInfo vmstate_info_unused_buffer = { | |
1267 | .name = "unused_buffer", | |
1268 | .get = get_unused_buffer, | |
1269 | .put = put_unused_buffer, | |
1270 | }; | |
1271 | ||
08e99e29 PM |
1272 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1273 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1274 | * bit words with the bits in big endian order. The in-memory format | |
1275 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1276 | */ | |
1277 | /* This is the number of 64 bit words sent over the wire */ | |
1278 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1279 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1280 | { | |
1281 | unsigned long *bmp = pv; | |
1282 | int i, idx = 0; | |
1283 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1284 | uint64_t w = qemu_get_be64(f); | |
1285 | bmp[idx++] = w; | |
1286 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1287 | bmp[idx++] = w >> 32; | |
1288 | } | |
1289 | } | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1294 | { | |
1295 | unsigned long *bmp = pv; | |
1296 | int i, idx = 0; | |
1297 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1298 | uint64_t w = bmp[idx++]; | |
1299 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1300 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1301 | } | |
1302 | qemu_put_be64(f, w); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | const VMStateInfo vmstate_info_bitmap = { | |
1307 | .name = "bitmap", | |
1308 | .get = get_bitmap, | |
1309 | .put = put_bitmap, | |
1310 | }; | |
1311 | ||
7685ee6a AW |
1312 | typedef struct CompatEntry { |
1313 | char idstr[256]; | |
1314 | int instance_id; | |
1315 | } CompatEntry; | |
1316 | ||
a672b469 | 1317 | typedef struct SaveStateEntry { |
72cf2d4f | 1318 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1319 | char idstr[256]; |
1320 | int instance_id; | |
4d2ffa08 | 1321 | int alias_id; |
a672b469 AL |
1322 | int version_id; |
1323 | int section_id; | |
22ea40f4 | 1324 | SaveVMHandlers *ops; |
9ed7d6ae | 1325 | const VMStateDescription *vmsd; |
a672b469 | 1326 | void *opaque; |
7685ee6a | 1327 | CompatEntry *compat; |
24312968 | 1328 | int no_migrate; |
a7ae8355 | 1329 | int is_ram; |
a672b469 AL |
1330 | } SaveStateEntry; |
1331 | ||
c163b5ca | 1332 | |
72cf2d4f BS |
1333 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1334 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1335 | static int global_section_id; |
a672b469 | 1336 | |
8718e999 JQ |
1337 | static int calculate_new_instance_id(const char *idstr) |
1338 | { | |
1339 | SaveStateEntry *se; | |
1340 | int instance_id = 0; | |
1341 | ||
72cf2d4f | 1342 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1343 | if (strcmp(idstr, se->idstr) == 0 |
1344 | && instance_id <= se->instance_id) { | |
1345 | instance_id = se->instance_id + 1; | |
1346 | } | |
1347 | } | |
1348 | return instance_id; | |
1349 | } | |
1350 | ||
7685ee6a AW |
1351 | static int calculate_compat_instance_id(const char *idstr) |
1352 | { | |
1353 | SaveStateEntry *se; | |
1354 | int instance_id = 0; | |
1355 | ||
1356 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1357 | if (!se->compat) | |
1358 | continue; | |
1359 | ||
1360 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1361 | && instance_id <= se->compat->instance_id) { | |
1362 | instance_id = se->compat->instance_id + 1; | |
1363 | } | |
1364 | } | |
1365 | return instance_id; | |
1366 | } | |
1367 | ||
a672b469 AL |
1368 | /* TODO: Individual devices generally have very little idea about the rest |
1369 | of the system, so instance_id should be removed/replaced. | |
1370 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1371 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1372 | int register_savevm_live(DeviceState *dev, |
1373 | const char *idstr, | |
a672b469 AL |
1374 | int instance_id, |
1375 | int version_id, | |
7908c78d | 1376 | SaveVMHandlers *ops, |
a672b469 AL |
1377 | void *opaque) |
1378 | { | |
8718e999 | 1379 | SaveStateEntry *se; |
a672b469 | 1380 | |
7267c094 | 1381 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1382 | se->version_id = version_id; |
1383 | se->section_id = global_section_id++; | |
7908c78d | 1384 | se->ops = ops; |
a672b469 | 1385 | se->opaque = opaque; |
9ed7d6ae | 1386 | se->vmsd = NULL; |
24312968 | 1387 | se->no_migrate = 0; |
a7ae8355 | 1388 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1389 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1390 | se->is_ram = 1; |
1391 | } | |
a672b469 | 1392 | |
09e5ab63 AL |
1393 | if (dev) { |
1394 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1395 | if (id) { |
1396 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1397 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1398 | g_free(id); |
7685ee6a | 1399 | |
7267c094 | 1400 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1401 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1402 | se->compat->instance_id = instance_id == -1 ? | |
1403 | calculate_compat_instance_id(idstr) : instance_id; | |
1404 | instance_id = -1; | |
1405 | } | |
1406 | } | |
1407 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1408 | ||
8718e999 | 1409 | if (instance_id == -1) { |
7685ee6a | 1410 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1411 | } else { |
1412 | se->instance_id = instance_id; | |
a672b469 | 1413 | } |
7685ee6a | 1414 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1415 | /* add at the end of list */ |
72cf2d4f | 1416 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1417 | return 0; |
1418 | } | |
1419 | ||
0be71e32 AW |
1420 | int register_savevm(DeviceState *dev, |
1421 | const char *idstr, | |
a672b469 AL |
1422 | int instance_id, |
1423 | int version_id, | |
1424 | SaveStateHandler *save_state, | |
1425 | LoadStateHandler *load_state, | |
1426 | void *opaque) | |
1427 | { | |
7908c78d JQ |
1428 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1429 | ops->save_state = save_state; | |
1430 | ops->load_state = load_state; | |
0be71e32 | 1431 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1432 | ops, opaque); |
a672b469 AL |
1433 | } |
1434 | ||
0be71e32 | 1435 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1436 | { |
8718e999 | 1437 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1438 | char id[256] = ""; |
1439 | ||
09e5ab63 AL |
1440 | if (dev) { |
1441 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1442 | if (path) { |
1443 | pstrcpy(id, sizeof(id), path); | |
1444 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1445 | g_free(path); |
7685ee6a AW |
1446 | } |
1447 | } | |
1448 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1449 | |
72cf2d4f | 1450 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1451 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1452 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1453 | if (se->compat) { |
7267c094 | 1454 | g_free(se->compat); |
69e58af9 | 1455 | } |
22ea40f4 | 1456 | g_free(se->ops); |
7267c094 | 1457 | g_free(se); |
41bd13af | 1458 | } |
41bd13af AL |
1459 | } |
1460 | } | |
1461 | ||
0be71e32 | 1462 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1463 | const VMStateDescription *vmsd, |
1464 | void *opaque, int alias_id, | |
1465 | int required_for_version) | |
9ed7d6ae | 1466 | { |
8718e999 | 1467 | SaveStateEntry *se; |
9ed7d6ae | 1468 | |
4d2ffa08 JK |
1469 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1470 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1471 | ||
7267c094 | 1472 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1473 | se->version_id = vmsd->version_id; |
1474 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1475 | se->opaque = opaque; |
1476 | se->vmsd = vmsd; | |
4d2ffa08 | 1477 | se->alias_id = alias_id; |
2837c8ea | 1478 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1479 | |
09e5ab63 AL |
1480 | if (dev) { |
1481 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1482 | if (id) { |
1483 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1484 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1485 | g_free(id); |
7685ee6a | 1486 | |
7267c094 | 1487 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1488 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1489 | se->compat->instance_id = instance_id == -1 ? | |
1490 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1491 | instance_id = -1; | |
1492 | } | |
1493 | } | |
1494 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1495 | ||
8718e999 | 1496 | if (instance_id == -1) { |
7685ee6a | 1497 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1498 | } else { |
1499 | se->instance_id = instance_id; | |
9ed7d6ae | 1500 | } |
7685ee6a | 1501 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1502 | /* add at the end of list */ |
72cf2d4f | 1503 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1504 | return 0; |
1505 | } | |
1506 | ||
0be71e32 AW |
1507 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1508 | void *opaque) | |
9ed7d6ae | 1509 | { |
1eb7538b JQ |
1510 | SaveStateEntry *se, *new_se; |
1511 | ||
72cf2d4f | 1512 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1513 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1514 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1515 | if (se->compat) { |
7267c094 | 1516 | g_free(se->compat); |
69e58af9 | 1517 | } |
7267c094 | 1518 | g_free(se); |
1eb7538b JQ |
1519 | } |
1520 | } | |
9ed7d6ae JQ |
1521 | } |
1522 | ||
811814bd JQ |
1523 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1524 | void *opaque); | |
1525 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1526 | void *opaque); | |
1527 | ||
9ed7d6ae JQ |
1528 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1529 | void *opaque, int version_id) | |
1530 | { | |
1531 | VMStateField *field = vmsd->fields; | |
811814bd | 1532 | int ret; |
9ed7d6ae JQ |
1533 | |
1534 | if (version_id > vmsd->version_id) { | |
1535 | return -EINVAL; | |
1536 | } | |
1537 | if (version_id < vmsd->minimum_version_id_old) { | |
1538 | return -EINVAL; | |
1539 | } | |
1540 | if (version_id < vmsd->minimum_version_id) { | |
1541 | return vmsd->load_state_old(f, opaque, version_id); | |
1542 | } | |
fd4d52de JQ |
1543 | if (vmsd->pre_load) { |
1544 | int ret = vmsd->pre_load(opaque); | |
1545 | if (ret) | |
1546 | return ret; | |
1547 | } | |
9ed7d6ae | 1548 | while(field->name) { |
f11f6a5f JQ |
1549 | if ((field->field_exists && |
1550 | field->field_exists(opaque, version_id)) || | |
1551 | (!field->field_exists && | |
1552 | field->version_id <= version_id)) { | |
f752a6aa | 1553 | void *base_addr = opaque + field->offset; |
811814bd | 1554 | int i, n_elems = 1; |
e61a1e0a | 1555 | int size = field->size; |
9ed7d6ae | 1556 | |
e61a1e0a JQ |
1557 | if (field->flags & VMS_VBUFFER) { |
1558 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1559 | if (field->flags & VMS_MULTIPLY) { |
1560 | size *= field->size; | |
1561 | } | |
e61a1e0a | 1562 | } |
f752a6aa JQ |
1563 | if (field->flags & VMS_ARRAY) { |
1564 | n_elems = field->num; | |
d6698281 JQ |
1565 | } else if (field->flags & VMS_VARRAY_INT32) { |
1566 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1567 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1568 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1569 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1570 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1571 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1572 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1573 | } |
dde0463b | 1574 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1575 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1576 | } |
f752a6aa | 1577 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1578 | void *addr = base_addr + size * i; |
ec245e21 | 1579 | |
19df438b JQ |
1580 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1581 | addr = *(void **)addr; | |
1582 | } | |
ec245e21 | 1583 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1584 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1585 | } else { |
e61a1e0a | 1586 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1587 | |
1588 | } | |
f752a6aa JQ |
1589 | if (ret < 0) { |
1590 | return ret; | |
1591 | } | |
9ed7d6ae JQ |
1592 | } |
1593 | } | |
1594 | field++; | |
1595 | } | |
811814bd JQ |
1596 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1597 | if (ret != 0) { | |
1598 | return ret; | |
1599 | } | |
752ff2fa | 1600 | if (vmsd->post_load) { |
e59fb374 | 1601 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1602 | } |
9ed7d6ae JQ |
1603 | return 0; |
1604 | } | |
1605 | ||
1606 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1607 | void *opaque) |
9ed7d6ae JQ |
1608 | { |
1609 | VMStateField *field = vmsd->fields; | |
1610 | ||
8fb0791d JQ |
1611 | if (vmsd->pre_save) { |
1612 | vmsd->pre_save(opaque); | |
1613 | } | |
9ed7d6ae | 1614 | while(field->name) { |
f11f6a5f JQ |
1615 | if (!field->field_exists || |
1616 | field->field_exists(opaque, vmsd->version_id)) { | |
1617 | void *base_addr = opaque + field->offset; | |
1618 | int i, n_elems = 1; | |
e61a1e0a | 1619 | int size = field->size; |
dde0463b | 1620 | |
e61a1e0a JQ |
1621 | if (field->flags & VMS_VBUFFER) { |
1622 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1623 | if (field->flags & VMS_MULTIPLY) { |
1624 | size *= field->size; | |
1625 | } | |
e61a1e0a | 1626 | } |
f11f6a5f JQ |
1627 | if (field->flags & VMS_ARRAY) { |
1628 | n_elems = field->num; | |
d6698281 JQ |
1629 | } else if (field->flags & VMS_VARRAY_INT32) { |
1630 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1631 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1632 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1633 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1634 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1635 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1636 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1637 | } |
1638 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1639 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1640 | } |
1641 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1642 | void *addr = base_addr + size * i; |
ec245e21 | 1643 | |
8595387e JQ |
1644 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1645 | addr = *(void **)addr; | |
1646 | } | |
f11f6a5f JQ |
1647 | if (field->flags & VMS_STRUCT) { |
1648 | vmstate_save_state(f, field->vmsd, addr); | |
1649 | } else { | |
e61a1e0a | 1650 | field->info->put(f, addr, size); |
f11f6a5f | 1651 | } |
ec245e21 | 1652 | } |
dde0463b | 1653 | } |
9ed7d6ae JQ |
1654 | field++; |
1655 | } | |
811814bd | 1656 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1657 | } |
1658 | ||
4082be4d JQ |
1659 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1660 | { | |
9ed7d6ae | 1661 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1662 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1663 | } |
1664 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1665 | } |
1666 | ||
dc912121 | 1667 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1668 | { |
9ed7d6ae | 1669 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1670 | se->ops->save_state(f, se->opaque); |
dc912121 | 1671 | return; |
9ed7d6ae JQ |
1672 | } |
1673 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1674 | } |
1675 | ||
a672b469 AL |
1676 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1677 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1678 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1679 | ||
1680 | #define QEMU_VM_EOF 0x00 | |
1681 | #define QEMU_VM_SECTION_START 0x01 | |
1682 | #define QEMU_VM_SECTION_PART 0x02 | |
1683 | #define QEMU_VM_SECTION_END 0x03 | |
1684 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1685 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1686 | |
e1c37d0e | 1687 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1688 | { |
1689 | SaveStateEntry *se; | |
1690 | ||
1691 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1692 | if (se->no_migrate) { | |
e1c37d0e | 1693 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1694 | return true; |
1695 | } | |
1696 | } | |
1697 | return false; | |
1698 | } | |
1699 | ||
47c8c17a PB |
1700 | void qemu_savevm_state_begin(QEMUFile *f, |
1701 | const MigrationParams *params) | |
a672b469 AL |
1702 | { |
1703 | SaveStateEntry *se; | |
39346385 | 1704 | int ret; |
a672b469 | 1705 | |
c163b5ca | 1706 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1707 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1708 | continue; |
6607ae23 | 1709 | } |
22ea40f4 | 1710 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1711 | } |
1712 | ||
a672b469 AL |
1713 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1714 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1715 | ||
72cf2d4f | 1716 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1717 | int len; |
1718 | ||
d1315aac | 1719 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1720 | continue; |
22ea40f4 | 1721 | } |
6bd68781 JQ |
1722 | if (se->ops && se->ops->is_active) { |
1723 | if (!se->ops->is_active(se->opaque)) { | |
1724 | continue; | |
1725 | } | |
1726 | } | |
a672b469 AL |
1727 | /* Section type */ |
1728 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1729 | qemu_put_be32(f, se->section_id); | |
1730 | ||
1731 | /* ID string */ | |
1732 | len = strlen(se->idstr); | |
1733 | qemu_put_byte(f, len); | |
1734 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1735 | ||
1736 | qemu_put_be32(f, se->instance_id); | |
1737 | qemu_put_be32(f, se->version_id); | |
1738 | ||
d1315aac | 1739 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1740 | if (ret < 0) { |
47c8c17a PB |
1741 | qemu_file_set_error(f, ret); |
1742 | break; | |
2975725f | 1743 | } |
a672b469 | 1744 | } |
a672b469 AL |
1745 | } |
1746 | ||
39346385 | 1747 | /* |
07f35073 | 1748 | * this function has three return values: |
39346385 JQ |
1749 | * negative: there was one error, and we have -errno. |
1750 | * 0 : We haven't finished, caller have to go again | |
1751 | * 1 : We have finished, we can go to complete phase | |
1752 | */ | |
539de124 | 1753 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1754 | { |
1755 | SaveStateEntry *se; | |
1756 | int ret = 1; | |
1757 | ||
72cf2d4f | 1758 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1759 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1760 | continue; |
22ea40f4 | 1761 | } |
6bd68781 JQ |
1762 | if (se->ops && se->ops->is_active) { |
1763 | if (!se->ops->is_active(se->opaque)) { | |
1764 | continue; | |
1765 | } | |
1766 | } | |
aac844ed JQ |
1767 | if (qemu_file_rate_limit(f)) { |
1768 | return 0; | |
1769 | } | |
517a13c9 | 1770 | trace_savevm_section_start(); |
a672b469 AL |
1771 | /* Section type */ |
1772 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1773 | qemu_put_be32(f, se->section_id); | |
1774 | ||
16310a3c | 1775 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1776 | trace_savevm_section_end(se->section_id); |
1777 | ||
47c8c17a PB |
1778 | if (ret < 0) { |
1779 | qemu_file_set_error(f, ret); | |
1780 | } | |
2975725f | 1781 | if (ret <= 0) { |
90697be8 JK |
1782 | /* Do not proceed to the next vmstate before this one reported |
1783 | completion of the current stage. This serializes the migration | |
1784 | and reduces the probability that a faster changing state is | |
1785 | synchronized over and over again. */ | |
1786 | break; | |
1787 | } | |
a672b469 | 1788 | } |
39346385 | 1789 | return ret; |
a672b469 AL |
1790 | } |
1791 | ||
47c8c17a | 1792 | void qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1793 | { |
1794 | SaveStateEntry *se; | |
2975725f | 1795 | int ret; |
a672b469 | 1796 | |
ea375f9a JK |
1797 | cpu_synchronize_all_states(); |
1798 | ||
72cf2d4f | 1799 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1800 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1801 | continue; |
22ea40f4 | 1802 | } |
6bd68781 JQ |
1803 | if (se->ops && se->ops->is_active) { |
1804 | if (!se->ops->is_active(se->opaque)) { | |
1805 | continue; | |
1806 | } | |
1807 | } | |
517a13c9 | 1808 | trace_savevm_section_start(); |
a672b469 AL |
1809 | /* Section type */ |
1810 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1811 | qemu_put_be32(f, se->section_id); | |
1812 | ||
16310a3c | 1813 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1814 | trace_savevm_section_end(se->section_id); |
2975725f | 1815 | if (ret < 0) { |
47c8c17a PB |
1816 | qemu_file_set_error(f, ret); |
1817 | return; | |
2975725f | 1818 | } |
a672b469 AL |
1819 | } |
1820 | ||
72cf2d4f | 1821 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1822 | int len; |
1823 | ||
22ea40f4 | 1824 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1825 | continue; |
22ea40f4 | 1826 | } |
517a13c9 | 1827 | trace_savevm_section_start(); |
a672b469 AL |
1828 | /* Section type */ |
1829 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1830 | qemu_put_be32(f, se->section_id); | |
1831 | ||
1832 | /* ID string */ | |
1833 | len = strlen(se->idstr); | |
1834 | qemu_put_byte(f, len); | |
1835 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1836 | ||
1837 | qemu_put_be32(f, se->instance_id); | |
1838 | qemu_put_be32(f, se->version_id); | |
1839 | ||
dc912121 | 1840 | vmstate_save(f, se); |
517a13c9 | 1841 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1842 | } |
1843 | ||
1844 | qemu_put_byte(f, QEMU_VM_EOF); | |
edaae611 | 1845 | qemu_fflush(f); |
a672b469 AL |
1846 | } |
1847 | ||
e4ed1541 JQ |
1848 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1849 | { | |
1850 | SaveStateEntry *se; | |
1851 | uint64_t ret = 0; | |
1852 | ||
1853 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1854 | if (!se->ops || !se->ops->save_live_pending) { | |
1855 | continue; | |
1856 | } | |
1857 | if (se->ops && se->ops->is_active) { | |
1858 | if (!se->ops->is_active(se->opaque)) { | |
1859 | continue; | |
1860 | } | |
1861 | } | |
1862 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1863 | } | |
1864 | return ret; | |
1865 | } | |
1866 | ||
6522773f | 1867 | void qemu_savevm_state_cancel(void) |
4ec7fcc7 JK |
1868 | { |
1869 | SaveStateEntry *se; | |
1870 | ||
1871 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1872 | if (se->ops && se->ops->cancel) { |
1873 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1874 | } |
1875 | } | |
1876 | } | |
1877 | ||
e1c37d0e | 1878 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1879 | { |
a672b469 | 1880 | int ret; |
6607ae23 IY |
1881 | MigrationParams params = { |
1882 | .blk = 0, | |
1883 | .shared = 0 | |
1884 | }; | |
a672b469 | 1885 | |
e1c37d0e | 1886 | if (qemu_savevm_state_blocked(NULL)) { |
04943eba | 1887 | return -EINVAL; |
dc912121 AW |
1888 | } |
1889 | ||
9b095037 | 1890 | qemu_mutex_unlock_iothread(); |
47c8c17a | 1891 | qemu_savevm_state_begin(f, ¶ms); |
9b095037 PB |
1892 | qemu_mutex_lock_iothread(); |
1893 | ||
47c8c17a PB |
1894 | while (qemu_file_get_error(f) == 0) { |
1895 | if (qemu_savevm_state_iterate(f) > 0) { | |
1896 | break; | |
1897 | } | |
1898 | } | |
a672b469 | 1899 | |
47c8c17a | 1900 | ret = qemu_file_get_error(f); |
39346385 | 1901 | if (ret == 0) { |
47c8c17a | 1902 | qemu_savevm_state_complete(f); |
624b9cc2 | 1903 | ret = qemu_file_get_error(f); |
39346385 | 1904 | } |
04943eba PB |
1905 | if (ret != 0) { |
1906 | qemu_savevm_state_cancel(); | |
1907 | } | |
a672b469 AL |
1908 | return ret; |
1909 | } | |
1910 | ||
a7ae8355 SS |
1911 | static int qemu_save_device_state(QEMUFile *f) |
1912 | { | |
1913 | SaveStateEntry *se; | |
1914 | ||
1915 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1916 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1917 | ||
1918 | cpu_synchronize_all_states(); | |
1919 | ||
1920 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1921 | int len; | |
1922 | ||
1923 | if (se->is_ram) { | |
1924 | continue; | |
1925 | } | |
22ea40f4 | 1926 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1927 | continue; |
1928 | } | |
1929 | ||
1930 | /* Section type */ | |
1931 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1932 | qemu_put_be32(f, se->section_id); | |
1933 | ||
1934 | /* ID string */ | |
1935 | len = strlen(se->idstr); | |
1936 | qemu_put_byte(f, len); | |
1937 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1938 | ||
1939 | qemu_put_be32(f, se->instance_id); | |
1940 | qemu_put_be32(f, se->version_id); | |
1941 | ||
1942 | vmstate_save(f, se); | |
1943 | } | |
1944 | ||
1945 | qemu_put_byte(f, QEMU_VM_EOF); | |
1946 | ||
1947 | return qemu_file_get_error(f); | |
1948 | } | |
1949 | ||
a672b469 AL |
1950 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1951 | { | |
1952 | SaveStateEntry *se; | |
1953 | ||
72cf2d4f | 1954 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1955 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1956 | (instance_id == se->instance_id || |
1957 | instance_id == se->alias_id)) | |
a672b469 | 1958 | return se; |
7685ee6a AW |
1959 | /* Migrating from an older version? */ |
1960 | if (strstr(se->idstr, idstr) && se->compat) { | |
1961 | if (!strcmp(se->compat->idstr, idstr) && | |
1962 | (instance_id == se->compat->instance_id || | |
1963 | instance_id == se->alias_id)) | |
1964 | return se; | |
1965 | } | |
a672b469 AL |
1966 | } |
1967 | return NULL; | |
1968 | } | |
1969 | ||
811814bd JQ |
1970 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1971 | { | |
1972 | while(sub && sub->needed) { | |
1973 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1974 | return sub->vmsd; | |
1975 | } | |
1976 | sub++; | |
1977 | } | |
1978 | return NULL; | |
1979 | } | |
1980 | ||
1981 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1982 | void *opaque) | |
1983 | { | |
c6380724 | 1984 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1985 | char idstr[256]; |
1986 | int ret; | |
c6380724 | 1987 | uint8_t version_id, len, size; |
811814bd JQ |
1988 | const VMStateDescription *sub_vmsd; |
1989 | ||
c6380724 JQ |
1990 | len = qemu_peek_byte(f, 1); |
1991 | if (len < strlen(vmsd->name) + 1) { | |
1992 | /* subsection name has be be "section_name/a" */ | |
1993 | return 0; | |
1994 | } | |
1995 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1996 | if (size != len) { | |
1997 | return 0; | |
1998 | } | |
1999 | idstr[size] = 0; | |
811814bd | 2000 | |
c6380724 JQ |
2001 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
2002 | /* it don't have a valid subsection name */ | |
2003 | return 0; | |
2004 | } | |
3da9eebd | 2005 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
2006 | if (sub_vmsd == NULL) { |
2007 | return -ENOENT; | |
2008 | } | |
c6380724 JQ |
2009 | qemu_file_skip(f, 1); /* subsection */ |
2010 | qemu_file_skip(f, 1); /* len */ | |
2011 | qemu_file_skip(f, len); /* idstr */ | |
2012 | version_id = qemu_get_be32(f); | |
2013 | ||
811814bd JQ |
2014 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
2015 | if (ret) { | |
2016 | return ret; | |
2017 | } | |
2018 | } | |
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
2023 | void *opaque) | |
2024 | { | |
2025 | const VMStateSubsection *sub = vmsd->subsections; | |
2026 | ||
2027 | while (sub && sub->needed) { | |
2028 | if (sub->needed(opaque)) { | |
2029 | const VMStateDescription *vmsd = sub->vmsd; | |
2030 | uint8_t len; | |
2031 | ||
2032 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
2033 | len = strlen(vmsd->name); | |
2034 | qemu_put_byte(f, len); | |
2035 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
2036 | qemu_put_be32(f, vmsd->version_id); | |
2037 | vmstate_save_state(f, vmsd, opaque); | |
2038 | } | |
2039 | sub++; | |
2040 | } | |
2041 | } | |
2042 | ||
a672b469 | 2043 | typedef struct LoadStateEntry { |
72cf2d4f | 2044 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
2045 | SaveStateEntry *se; |
2046 | int section_id; | |
2047 | int version_id; | |
a672b469 AL |
2048 | } LoadStateEntry; |
2049 | ||
a672b469 AL |
2050 | int qemu_loadvm_state(QEMUFile *f) |
2051 | { | |
72cf2d4f BS |
2052 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
2053 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 2054 | LoadStateEntry *le, *new_le; |
a672b469 AL |
2055 | uint8_t section_type; |
2056 | unsigned int v; | |
2057 | int ret; | |
2058 | ||
e1c37d0e | 2059 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
2060 | return -EINVAL; |
2061 | } | |
2062 | ||
a672b469 AL |
2063 | v = qemu_get_be32(f); |
2064 | if (v != QEMU_VM_FILE_MAGIC) | |
2065 | return -EINVAL; | |
2066 | ||
2067 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
2068 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
2069 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
2070 | return -ENOTSUP; | |
2071 | } | |
a672b469 AL |
2072 | if (v != QEMU_VM_FILE_VERSION) |
2073 | return -ENOTSUP; | |
2074 | ||
2075 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
2076 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
2077 | SaveStateEntry *se; |
2078 | char idstr[257]; | |
2079 | int len; | |
2080 | ||
2081 | switch (section_type) { | |
2082 | case QEMU_VM_SECTION_START: | |
2083 | case QEMU_VM_SECTION_FULL: | |
2084 | /* Read section start */ | |
2085 | section_id = qemu_get_be32(f); | |
2086 | len = qemu_get_byte(f); | |
2087 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
2088 | idstr[len] = 0; | |
2089 | instance_id = qemu_get_be32(f); | |
2090 | version_id = qemu_get_be32(f); | |
2091 | ||
2092 | /* Find savevm section */ | |
2093 | se = find_se(idstr, instance_id); | |
2094 | if (se == NULL) { | |
2095 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
2096 | ret = -EINVAL; | |
2097 | goto out; | |
2098 | } | |
2099 | ||
2100 | /* Validate version */ | |
2101 | if (version_id > se->version_id) { | |
2102 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
2103 | version_id, idstr, se->version_id); | |
2104 | ret = -EINVAL; | |
2105 | goto out; | |
2106 | } | |
2107 | ||
2108 | /* Add entry */ | |
7267c094 | 2109 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
2110 | |
2111 | le->se = se; | |
2112 | le->section_id = section_id; | |
2113 | le->version_id = version_id; | |
72cf2d4f | 2114 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2115 | |
4082be4d | 2116 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2117 | if (ret < 0) { |
2118 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2119 | instance_id, idstr); | |
2120 | goto out; | |
2121 | } | |
a672b469 AL |
2122 | break; |
2123 | case QEMU_VM_SECTION_PART: | |
2124 | case QEMU_VM_SECTION_END: | |
2125 | section_id = qemu_get_be32(f); | |
2126 | ||
72cf2d4f | 2127 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2128 | if (le->section_id == section_id) { |
2129 | break; | |
2130 | } | |
2131 | } | |
a672b469 AL |
2132 | if (le == NULL) { |
2133 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2134 | ret = -EINVAL; | |
2135 | goto out; | |
2136 | } | |
2137 | ||
4082be4d | 2138 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2139 | if (ret < 0) { |
2140 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2141 | section_id); | |
2142 | goto out; | |
2143 | } | |
a672b469 AL |
2144 | break; |
2145 | default: | |
2146 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2147 | ret = -EINVAL; | |
2148 | goto out; | |
2149 | } | |
2150 | } | |
2151 | ||
ea375f9a JK |
2152 | cpu_synchronize_all_post_init(); |
2153 | ||
a672b469 AL |
2154 | ret = 0; |
2155 | ||
2156 | out: | |
72cf2d4f BS |
2157 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2158 | QLIST_REMOVE(le, entry); | |
7267c094 | 2159 | g_free(le); |
a672b469 AL |
2160 | } |
2161 | ||
42802d47 JQ |
2162 | if (ret == 0) { |
2163 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2164 | } |
a672b469 AL |
2165 | |
2166 | return ret; | |
2167 | } | |
2168 | ||
a672b469 AL |
2169 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2170 | const char *name) | |
2171 | { | |
2172 | QEMUSnapshotInfo *sn_tab, *sn; | |
2173 | int nb_sns, i, ret; | |
2174 | ||
2175 | ret = -ENOENT; | |
2176 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2177 | if (nb_sns < 0) | |
2178 | return ret; | |
2179 | for(i = 0; i < nb_sns; i++) { | |
2180 | sn = &sn_tab[i]; | |
2181 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2182 | *sn_info = *sn; | |
2183 | ret = 0; | |
2184 | break; | |
2185 | } | |
2186 | } | |
7267c094 | 2187 | g_free(sn_tab); |
a672b469 AL |
2188 | return ret; |
2189 | } | |
2190 | ||
cb499fb2 KW |
2191 | /* |
2192 | * Deletes snapshots of a given name in all opened images. | |
2193 | */ | |
2194 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2195 | { | |
2196 | BlockDriverState *bs; | |
cb499fb2 KW |
2197 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2198 | int ret; | |
2199 | ||
dbc13590 MA |
2200 | bs = NULL; |
2201 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2202 | if (bdrv_can_snapshot(bs) && |
2203 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2204 | { | |
2205 | ret = bdrv_snapshot_delete(bs, name); | |
2206 | if (ret < 0) { | |
2207 | monitor_printf(mon, | |
2208 | "Error while deleting snapshot on '%s'\n", | |
2209 | bdrv_get_device_name(bs)); | |
2210 | return -1; | |
2211 | } | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | return 0; | |
2216 | } | |
2217 | ||
d54908a5 | 2218 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2219 | { |
2220 | BlockDriverState *bs, *bs1; | |
2221 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2222 | int ret; |
a672b469 AL |
2223 | QEMUFile *f; |
2224 | int saved_vm_running; | |
c2c9a466 | 2225 | uint64_t vm_state_size; |
68b891ec | 2226 | qemu_timeval tv; |
7d631a11 | 2227 | struct tm tm; |
d54908a5 | 2228 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2229 | |
feeee5ac | 2230 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2231 | bs = NULL; |
2232 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2233 | |
07b70bfb | 2234 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2235 | continue; |
2236 | } | |
2237 | ||
2238 | if (!bdrv_can_snapshot(bs)) { | |
2239 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2240 | bdrv_get_device_name(bs)); | |
2241 | return; | |
2242 | } | |
2243 | } | |
2244 | ||
f9092b10 | 2245 | bs = bdrv_snapshots(); |
a672b469 | 2246 | if (!bs) { |
376253ec | 2247 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2248 | return; |
2249 | } | |
a672b469 | 2250 | |
1354869c | 2251 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2252 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2253 | |
cb499fb2 | 2254 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2255 | |
2256 | /* fill auxiliary fields */ | |
68b891ec | 2257 | qemu_gettimeofday(&tv); |
a672b469 AL |
2258 | sn->date_sec = tv.tv_sec; |
2259 | sn->date_nsec = tv.tv_usec * 1000; | |
74475455 | 2260 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2261 | |
7d631a11 MDCF |
2262 | if (name) { |
2263 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2264 | if (ret >= 0) { | |
2265 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2266 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2267 | } else { | |
2268 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2269 | } | |
2270 | } else { | |
d7d9b528 BS |
2271 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2272 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 | 2273 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
7d631a11 MDCF |
2274 | } |
2275 | ||
cb499fb2 | 2276 | /* Delete old snapshots of the same name */ |
f139a412 | 2277 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2278 | goto the_end; |
2279 | } | |
2280 | ||
a672b469 | 2281 | /* save the VM state */ |
45566e9c | 2282 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2283 | if (!f) { |
376253ec | 2284 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2285 | goto the_end; |
2286 | } | |
e1c37d0e | 2287 | ret = qemu_savevm_state(f); |
2d22b18f | 2288 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2289 | qemu_fclose(f); |
2290 | if (ret < 0) { | |
376253ec | 2291 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2292 | goto the_end; |
2293 | } | |
2294 | ||
2295 | /* create the snapshots */ | |
2296 | ||
dbc13590 MA |
2297 | bs1 = NULL; |
2298 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2299 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2300 | /* Write VM state size only to the image that contains the state */ |
2301 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2302 | ret = bdrv_snapshot_create(bs1, sn); |
2303 | if (ret < 0) { | |
376253ec AL |
2304 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2305 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2306 | } |
2307 | } | |
2308 | } | |
2309 | ||
2310 | the_end: | |
2311 | if (saved_vm_running) | |
2312 | vm_start(); | |
2313 | } | |
2314 | ||
a7ae8355 SS |
2315 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2316 | { | |
2317 | QEMUFile *f; | |
2318 | int saved_vm_running; | |
2319 | int ret; | |
2320 | ||
2321 | saved_vm_running = runstate_is_running(); | |
2322 | vm_stop(RUN_STATE_SAVE_VM); | |
2323 | ||
2324 | f = qemu_fopen(filename, "wb"); | |
2325 | if (!f) { | |
2326 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2327 | goto the_end; | |
2328 | } | |
2329 | ret = qemu_save_device_state(f); | |
2330 | qemu_fclose(f); | |
2331 | if (ret < 0) { | |
2332 | error_set(errp, QERR_IO_ERROR); | |
2333 | } | |
2334 | ||
2335 | the_end: | |
2336 | if (saved_vm_running) | |
2337 | vm_start(); | |
a7ae8355 SS |
2338 | } |
2339 | ||
03cd4655 | 2340 | int load_vmstate(const char *name) |
a672b469 | 2341 | { |
f0aa7a8b | 2342 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2343 | QEMUSnapshotInfo sn; |
a672b469 | 2344 | QEMUFile *f; |
751c6a17 | 2345 | int ret; |
a672b469 | 2346 | |
f0aa7a8b MDCF |
2347 | bs_vm_state = bdrv_snapshots(); |
2348 | if (!bs_vm_state) { | |
2349 | error_report("No block device supports snapshots"); | |
2350 | return -ENOTSUP; | |
2351 | } | |
2352 | ||
2353 | /* Don't even try to load empty VM states */ | |
2354 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2355 | if (ret < 0) { | |
2356 | return ret; | |
2357 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2358 | error_report("This is a disk-only snapshot. Revert to it offline " |
2359 | "using qemu-img."); | |
f0aa7a8b MDCF |
2360 | return -EINVAL; |
2361 | } | |
2362 | ||
2363 | /* Verify if there is any device that doesn't support snapshots and is | |
2364 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2365 | bs = NULL; |
2366 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2367 | |
07b70bfb | 2368 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2369 | continue; |
2370 | } | |
2371 | ||
2372 | if (!bdrv_can_snapshot(bs)) { | |
2373 | error_report("Device '%s' is writable but does not support snapshots.", | |
2374 | bdrv_get_device_name(bs)); | |
2375 | return -ENOTSUP; | |
2376 | } | |
feeee5ac | 2377 | |
f0aa7a8b MDCF |
2378 | ret = bdrv_snapshot_find(bs, &sn, name); |
2379 | if (ret < 0) { | |
2380 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2381 | bdrv_get_device_name(bs), name); | |
2382 | return ret; | |
2383 | } | |
a672b469 AL |
2384 | } |
2385 | ||
2386 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2387 | bdrv_drain_all(); |
a672b469 | 2388 | |
f0aa7a8b MDCF |
2389 | bs = NULL; |
2390 | while ((bs = bdrv_next(bs))) { | |
2391 | if (bdrv_can_snapshot(bs)) { | |
2392 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2393 | if (ret < 0) { |
f0aa7a8b MDCF |
2394 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2395 | ret, name, bdrv_get_device_name(bs)); | |
2396 | return ret; | |
a672b469 AL |
2397 | } |
2398 | } | |
2399 | } | |
2400 | ||
a672b469 | 2401 | /* restore the VM state */ |
f0aa7a8b | 2402 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2403 | if (!f) { |
1ecda02b | 2404 | error_report("Could not open VM state file"); |
05f2401e | 2405 | return -EINVAL; |
a672b469 | 2406 | } |
f0aa7a8b | 2407 | |
5a8a49d7 | 2408 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2409 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2410 | |
a672b469 AL |
2411 | qemu_fclose(f); |
2412 | if (ret < 0) { | |
1ecda02b | 2413 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2414 | return ret; |
a672b469 | 2415 | } |
f0aa7a8b | 2416 | |
05f2401e | 2417 | return 0; |
7b630349 JQ |
2418 | } |
2419 | ||
d54908a5 | 2420 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2421 | { |
2422 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2423 | int ret; |
d54908a5 | 2424 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2425 | |
f9092b10 | 2426 | bs = bdrv_snapshots(); |
a672b469 | 2427 | if (!bs) { |
376253ec | 2428 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2429 | return; |
2430 | } | |
2431 | ||
dbc13590 MA |
2432 | bs1 = NULL; |
2433 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2434 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2435 | ret = bdrv_snapshot_delete(bs1, name); |
2436 | if (ret < 0) { | |
2437 | if (ret == -ENOTSUP) | |
376253ec AL |
2438 | monitor_printf(mon, |
2439 | "Snapshots not supported on device '%s'\n", | |
2440 | bdrv_get_device_name(bs1)); | |
a672b469 | 2441 | else |
376253ec AL |
2442 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2443 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2444 | } |
2445 | } | |
2446 | } | |
2447 | } | |
2448 | ||
84f2d0ea | 2449 | void do_info_snapshots(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2450 | { |
2451 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2452 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2453 | int nb_sns, i, ret, available; | |
2454 | int total; | |
2455 | int *available_snapshots; | |
a672b469 AL |
2456 | char buf[256]; |
2457 | ||
f9092b10 | 2458 | bs = bdrv_snapshots(); |
a672b469 | 2459 | if (!bs) { |
376253ec | 2460 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2461 | return; |
2462 | } | |
a672b469 AL |
2463 | |
2464 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2465 | if (nb_sns < 0) { | |
376253ec | 2466 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2467 | return; |
2468 | } | |
f9209915 MDCF |
2469 | |
2470 | if (nb_sns == 0) { | |
2471 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2472 | return; | |
2473 | } | |
2474 | ||
7267c094 | 2475 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2476 | total = 0; |
2477 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2478 | sn = &sn_tab[i]; |
f9209915 MDCF |
2479 | available = 1; |
2480 | bs1 = NULL; | |
2481 | ||
2482 | while ((bs1 = bdrv_next(bs1))) { | |
2483 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2484 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2485 | if (ret < 0) { | |
2486 | available = 0; | |
2487 | break; | |
2488 | } | |
2489 | } | |
2490 | } | |
2491 | ||
2492 | if (available) { | |
2493 | available_snapshots[total] = i; | |
2494 | total++; | |
2495 | } | |
a672b469 | 2496 | } |
f9209915 MDCF |
2497 | |
2498 | if (total > 0) { | |
2499 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2500 | for (i = 0; i < total; i++) { | |
2501 | sn = &sn_tab[available_snapshots[i]]; | |
2502 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2503 | } | |
2504 | } else { | |
2505 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2506 | } | |
2507 | ||
7267c094 AL |
2508 | g_free(sn_tab); |
2509 | g_free(available_snapshots); | |
f9209915 | 2510 | |
a672b469 | 2511 | } |
c5705a77 AK |
2512 | |
2513 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2514 | { | |
1ddde087 | 2515 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2516 | memory_region_name(mr), dev); |
2517 | } | |
2518 | ||
2519 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2520 | { | |
2521 | /* Nothing do to while the implementation is in RAMBlock */ | |
2522 | } | |
2523 | ||
2524 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2525 | { | |
2526 | vmstate_register_ram(mr, NULL); | |
2527 | } |