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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 | 295 | |
cb88aa88 | 296 | if (s->file->ops->put_buffer || s->file->ops->writev_buffer) { |
ce39ee31 PB |
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 | ||
cb88aa88 OW |
519 | /** |
520 | * Flushes QEMUFile buffer | |
d82ca915 | 521 | * |
cb88aa88 OW |
522 | * If there is writev_buffer QEMUFileOps it uses it otherwise uses |
523 | * put_buffer ops. | |
d82ca915 | 524 | */ |
05f28b83 | 525 | static void qemu_fflush(QEMUFile *f) |
a672b469 | 526 | { |
cb88aa88 OW |
527 | ssize_t ret = 0; |
528 | int i = 0; | |
7311bea3 | 529 | |
cb88aa88 | 530 | if (!f->ops->writev_buffer && !f->ops->put_buffer) { |
93bf2104 PB |
531 | return; |
532 | } | |
cb88aa88 OW |
533 | |
534 | if (f->is_write && f->iovcnt > 0) { | |
535 | if (f->ops->writev_buffer) { | |
536 | ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt); | |
537 | if (ret >= 0) { | |
538 | f->pos += ret; | |
539 | } | |
540 | } else { | |
541 | for (i = 0; i < f->iovcnt && ret >= 0; i++) { | |
542 | ret = f->ops->put_buffer(f->opaque, f->iov[i].iov_base, f->pos, | |
543 | f->iov[i].iov_len); | |
544 | if (ret >= 0) { | |
545 | f->pos += ret; | |
546 | } | |
547 | } | |
7311bea3 | 548 | } |
a672b469 | 549 | f->buf_index = 0; |
b3ea2bdb | 550 | f->iovcnt = 0; |
a672b469 | 551 | } |
93bf2104 PB |
552 | if (ret < 0) { |
553 | qemu_file_set_error(f, ret); | |
554 | } | |
a672b469 AL |
555 | } |
556 | ||
557 | static void qemu_fill_buffer(QEMUFile *f) | |
558 | { | |
559 | int len; | |
0046c45b | 560 | int pending; |
a672b469 | 561 | |
9229bf3c | 562 | if (!f->ops->get_buffer) |
a672b469 AL |
563 | return; |
564 | ||
565 | if (f->is_write) | |
566 | abort(); | |
567 | ||
0046c45b JQ |
568 | pending = f->buf_size - f->buf_index; |
569 | if (pending > 0) { | |
570 | memmove(f->buf, f->buf + f->buf_index, pending); | |
571 | } | |
572 | f->buf_index = 0; | |
573 | f->buf_size = pending; | |
574 | ||
3f2d38fa | 575 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, |
0046c45b | 576 | IO_BUF_SIZE - pending); |
a672b469 | 577 | if (len > 0) { |
0046c45b | 578 | f->buf_size += len; |
3f2d38fa | 579 | f->pos += len; |
fa39a30f | 580 | } else if (len == 0) { |
02c4a051 | 581 | qemu_file_set_error(f, -EIO); |
a672b469 | 582 | } else if (len != -EAGAIN) |
c29110d5 | 583 | qemu_file_set_error(f, len); |
a672b469 AL |
584 | } |
585 | ||
70eb6330 PB |
586 | int qemu_get_fd(QEMUFile *f) |
587 | { | |
588 | if (f->ops->get_fd) { | |
589 | return f->ops->get_fd(f->opaque); | |
590 | } | |
591 | return -1; | |
592 | } | |
593 | ||
d82ca915 EH |
594 | /** Closes the file |
595 | * | |
596 | * Returns negative error value if any error happened on previous operations or | |
597 | * while closing the file. Returns 0 or positive number on success. | |
598 | * | |
599 | * The meaning of return value on success depends on the specific backend | |
600 | * being used. | |
601 | */ | |
602 | int qemu_fclose(QEMUFile *f) | |
603 | { | |
29eee86f | 604 | int ret; |
93bf2104 PB |
605 | qemu_fflush(f); |
606 | ret = qemu_file_get_error(f); | |
7311bea3 | 607 | |
9229bf3c PB |
608 | if (f->ops->close) { |
609 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
610 | if (ret >= 0) { |
611 | ret = ret2; | |
612 | } | |
7311bea3 | 613 | } |
d82ca915 EH |
614 | /* If any error was spotted before closing, we should report it |
615 | * instead of the close() return value. | |
616 | */ | |
617 | if (f->last_error) { | |
618 | ret = f->last_error; | |
619 | } | |
7267c094 | 620 | g_free(f); |
a672b469 AL |
621 | return ret; |
622 | } | |
623 | ||
b3ea2bdb OW |
624 | static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size) |
625 | { | |
626 | /* check for adjacent buffer and coalesce them */ | |
627 | if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base + | |
628 | f->iov[f->iovcnt - 1].iov_len) { | |
629 | f->iov[f->iovcnt - 1].iov_len += size; | |
630 | } else { | |
631 | f->iov[f->iovcnt].iov_base = (uint8_t *)buf; | |
632 | f->iov[f->iovcnt++].iov_len = size; | |
633 | } | |
634 | } | |
635 | ||
a672b469 AL |
636 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
637 | { | |
638 | int l; | |
639 | ||
c10682cb JQ |
640 | if (f->last_error) { |
641 | return; | |
642 | } | |
643 | ||
644 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
645 | fprintf(stderr, |
646 | "Attempted to write to buffer while read buffer is not empty\n"); | |
647 | abort(); | |
648 | } | |
649 | ||
c10682cb | 650 | while (size > 0) { |
a672b469 AL |
651 | l = IO_BUF_SIZE - f->buf_index; |
652 | if (l > size) | |
653 | l = size; | |
654 | memcpy(f->buf + f->buf_index, buf, l); | |
b3ea2bdb | 655 | add_to_iovec(f, f->buf + f->buf_index, l); |
a672b469 AL |
656 | f->is_write = 1; |
657 | f->buf_index += l; | |
1964a397 | 658 | f->bytes_xfer += l; |
a672b469 AL |
659 | buf += l; |
660 | size -= l; | |
b3ea2bdb | 661 | if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) { |
93bf2104 PB |
662 | qemu_fflush(f); |
663 | if (qemu_file_get_error(f)) { | |
c10682cb JQ |
664 | break; |
665 | } | |
7311bea3 | 666 | } |
a672b469 AL |
667 | } |
668 | } | |
669 | ||
670 | void qemu_put_byte(QEMUFile *f, int v) | |
671 | { | |
c10682cb JQ |
672 | if (f->last_error) { |
673 | return; | |
674 | } | |
675 | ||
676 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
677 | fprintf(stderr, |
678 | "Attempted to write to buffer while read buffer is not empty\n"); | |
679 | abort(); | |
680 | } | |
681 | ||
682 | f->buf[f->buf_index++] = v; | |
683 | f->is_write = 1; | |
7d8a30bb OW |
684 | f->bytes_xfer++; |
685 | ||
b3ea2bdb OW |
686 | add_to_iovec(f, f->buf + (f->buf_index - 1), 1); |
687 | ||
688 | if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) { | |
93bf2104 | 689 | qemu_fflush(f); |
7311bea3 | 690 | } |
a672b469 AL |
691 | } |
692 | ||
c6380724 | 693 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 694 | { |
c6380724 JQ |
695 | if (f->buf_index + size <= f->buf_size) { |
696 | f->buf_index += size; | |
697 | } | |
698 | } | |
699 | ||
700 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 701 | { |
c6380724 JQ |
702 | int pending; |
703 | int index; | |
a672b469 | 704 | |
b9ce1454 | 705 | if (f->is_write) { |
a672b469 | 706 | abort(); |
b9ce1454 | 707 | } |
a672b469 | 708 | |
c6380724 JQ |
709 | index = f->buf_index + offset; |
710 | pending = f->buf_size - index; | |
711 | if (pending < size) { | |
712 | qemu_fill_buffer(f); | |
713 | index = f->buf_index + offset; | |
714 | pending = f->buf_size - index; | |
715 | } | |
716 | ||
717 | if (pending <= 0) { | |
718 | return 0; | |
719 | } | |
720 | if (size > pending) { | |
721 | size = pending; | |
722 | } | |
723 | ||
724 | memcpy(buf, f->buf + index, size); | |
725 | return size; | |
726 | } | |
727 | ||
728 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
729 | { | |
730 | int pending = size; | |
731 | int done = 0; | |
732 | ||
733 | while (pending > 0) { | |
734 | int res; | |
735 | ||
736 | res = qemu_peek_buffer(f, buf, pending, 0); | |
737 | if (res == 0) { | |
738 | return done; | |
a672b469 | 739 | } |
c6380724 JQ |
740 | qemu_file_skip(f, res); |
741 | buf += res; | |
742 | pending -= res; | |
743 | done += res; | |
a672b469 | 744 | } |
c6380724 | 745 | return done; |
a672b469 AL |
746 | } |
747 | ||
c6380724 | 748 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 749 | { |
c6380724 JQ |
750 | int index = f->buf_index + offset; |
751 | ||
b9ce1454 | 752 | if (f->is_write) { |
811814bd | 753 | abort(); |
b9ce1454 | 754 | } |
811814bd | 755 | |
c6380724 | 756 | if (index >= f->buf_size) { |
811814bd | 757 | qemu_fill_buffer(f); |
c6380724 JQ |
758 | index = f->buf_index + offset; |
759 | if (index >= f->buf_size) { | |
811814bd | 760 | return 0; |
b9ce1454 | 761 | } |
811814bd | 762 | } |
c6380724 | 763 | return f->buf[index]; |
811814bd JQ |
764 | } |
765 | ||
a672b469 AL |
766 | int qemu_get_byte(QEMUFile *f) |
767 | { | |
65f3bb3d | 768 | int result; |
a672b469 | 769 | |
c6380724 JQ |
770 | result = qemu_peek_byte(f, 0); |
771 | qemu_file_skip(f, 1); | |
65f3bb3d | 772 | return result; |
a672b469 AL |
773 | } |
774 | ||
ad55ab42 | 775 | int64_t qemu_ftell(QEMUFile *f) |
a672b469 | 776 | { |
3f2d38fa PB |
777 | qemu_fflush(f); |
778 | return f->pos; | |
a672b469 AL |
779 | } |
780 | ||
a672b469 AL |
781 | int qemu_file_rate_limit(QEMUFile *f) |
782 | { | |
1964a397 PB |
783 | if (qemu_file_get_error(f)) { |
784 | return 1; | |
785 | } | |
786 | if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { | |
787 | return 1; | |
788 | } | |
a672b469 AL |
789 | return 0; |
790 | } | |
791 | ||
3d002df3 | 792 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 793 | { |
1964a397 | 794 | return f->xfer_limit; |
c163b5ca LS |
795 | } |
796 | ||
1964a397 | 797 | void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) |
19629537 | 798 | { |
1964a397 PB |
799 | f->xfer_limit = limit; |
800 | } | |
19629537 | 801 | |
1964a397 PB |
802 | void qemu_file_reset_rate_limit(QEMUFile *f) |
803 | { | |
804 | f->bytes_xfer = 0; | |
19629537 GC |
805 | } |
806 | ||
a672b469 AL |
807 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
808 | { | |
809 | qemu_put_byte(f, v >> 8); | |
810 | qemu_put_byte(f, v); | |
811 | } | |
812 | ||
813 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
814 | { | |
815 | qemu_put_byte(f, v >> 24); | |
816 | qemu_put_byte(f, v >> 16); | |
817 | qemu_put_byte(f, v >> 8); | |
818 | qemu_put_byte(f, v); | |
819 | } | |
820 | ||
821 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
822 | { | |
823 | qemu_put_be32(f, v >> 32); | |
824 | qemu_put_be32(f, v); | |
825 | } | |
826 | ||
827 | unsigned int qemu_get_be16(QEMUFile *f) | |
828 | { | |
829 | unsigned int v; | |
830 | v = qemu_get_byte(f) << 8; | |
831 | v |= qemu_get_byte(f); | |
832 | return v; | |
833 | } | |
834 | ||
835 | unsigned int qemu_get_be32(QEMUFile *f) | |
836 | { | |
837 | unsigned int v; | |
838 | v = qemu_get_byte(f) << 24; | |
839 | v |= qemu_get_byte(f) << 16; | |
840 | v |= qemu_get_byte(f) << 8; | |
841 | v |= qemu_get_byte(f); | |
842 | return v; | |
843 | } | |
844 | ||
845 | uint64_t qemu_get_be64(QEMUFile *f) | |
846 | { | |
847 | uint64_t v; | |
848 | v = (uint64_t)qemu_get_be32(f) << 32; | |
849 | v |= qemu_get_be32(f); | |
850 | return v; | |
851 | } | |
852 | ||
2ff68d07 PB |
853 | |
854 | /* timer */ | |
855 | ||
856 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
857 | { | |
858 | uint64_t expire_time; | |
859 | ||
860 | expire_time = qemu_timer_expire_time_ns(ts); | |
861 | qemu_put_be64(f, expire_time); | |
862 | } | |
863 | ||
864 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
865 | { | |
866 | uint64_t expire_time; | |
867 | ||
868 | expire_time = qemu_get_be64(f); | |
869 | if (expire_time != -1) { | |
870 | qemu_mod_timer_ns(ts, expire_time); | |
871 | } else { | |
872 | qemu_del_timer(ts); | |
873 | } | |
874 | } | |
875 | ||
876 | ||
cdae5cfb GH |
877 | /* bool */ |
878 | ||
879 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
880 | { | |
881 | bool *v = pv; | |
882 | *v = qemu_get_byte(f); | |
883 | return 0; | |
884 | } | |
885 | ||
886 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
887 | { | |
888 | bool *v = pv; | |
889 | qemu_put_byte(f, *v); | |
890 | } | |
891 | ||
892 | const VMStateInfo vmstate_info_bool = { | |
893 | .name = "bool", | |
894 | .get = get_bool, | |
895 | .put = put_bool, | |
896 | }; | |
897 | ||
9ed7d6ae JQ |
898 | /* 8 bit int */ |
899 | ||
900 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
901 | { | |
902 | int8_t *v = pv; | |
903 | qemu_get_s8s(f, v); | |
904 | return 0; | |
905 | } | |
906 | ||
84e2e3eb | 907 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 908 | { |
84e2e3eb | 909 | int8_t *v = pv; |
9ed7d6ae JQ |
910 | qemu_put_s8s(f, v); |
911 | } | |
912 | ||
913 | const VMStateInfo vmstate_info_int8 = { | |
914 | .name = "int8", | |
915 | .get = get_int8, | |
916 | .put = put_int8, | |
917 | }; | |
918 | ||
919 | /* 16 bit int */ | |
920 | ||
921 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
922 | { | |
923 | int16_t *v = pv; | |
924 | qemu_get_sbe16s(f, v); | |
925 | return 0; | |
926 | } | |
927 | ||
84e2e3eb | 928 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 929 | { |
84e2e3eb | 930 | int16_t *v = pv; |
9ed7d6ae JQ |
931 | qemu_put_sbe16s(f, v); |
932 | } | |
933 | ||
934 | const VMStateInfo vmstate_info_int16 = { | |
935 | .name = "int16", | |
936 | .get = get_int16, | |
937 | .put = put_int16, | |
938 | }; | |
939 | ||
940 | /* 32 bit int */ | |
941 | ||
942 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
943 | { | |
944 | int32_t *v = pv; | |
945 | qemu_get_sbe32s(f, v); | |
946 | return 0; | |
947 | } | |
948 | ||
84e2e3eb | 949 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 950 | { |
84e2e3eb | 951 | int32_t *v = pv; |
9ed7d6ae JQ |
952 | qemu_put_sbe32s(f, v); |
953 | } | |
954 | ||
955 | const VMStateInfo vmstate_info_int32 = { | |
956 | .name = "int32", | |
957 | .get = get_int32, | |
958 | .put = put_int32, | |
959 | }; | |
960 | ||
82501660 JQ |
961 | /* 32 bit int. See that the received value is the same than the one |
962 | in the field */ | |
963 | ||
964 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
965 | { | |
966 | int32_t *v = pv; | |
967 | int32_t v2; | |
968 | qemu_get_sbe32s(f, &v2); | |
969 | ||
970 | if (*v == v2) | |
971 | return 0; | |
972 | return -EINVAL; | |
973 | } | |
974 | ||
975 | const VMStateInfo vmstate_info_int32_equal = { | |
976 | .name = "int32 equal", | |
977 | .get = get_int32_equal, | |
978 | .put = put_int32, | |
979 | }; | |
980 | ||
0a031e0a JQ |
981 | /* 32 bit int. See that the received value is the less or the same |
982 | than the one in the field */ | |
983 | ||
984 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
985 | { | |
986 | int32_t *old = pv; | |
987 | int32_t new; | |
988 | qemu_get_sbe32s(f, &new); | |
989 | ||
990 | if (*old <= new) | |
991 | return 0; | |
992 | return -EINVAL; | |
993 | } | |
994 | ||
995 | const VMStateInfo vmstate_info_int32_le = { | |
996 | .name = "int32 equal", | |
997 | .get = get_int32_le, | |
998 | .put = put_int32, | |
999 | }; | |
1000 | ||
9ed7d6ae JQ |
1001 | /* 64 bit int */ |
1002 | ||
1003 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
1004 | { | |
1005 | int64_t *v = pv; | |
1006 | qemu_get_sbe64s(f, v); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
84e2e3eb | 1010 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1011 | { |
84e2e3eb | 1012 | int64_t *v = pv; |
9ed7d6ae JQ |
1013 | qemu_put_sbe64s(f, v); |
1014 | } | |
1015 | ||
1016 | const VMStateInfo vmstate_info_int64 = { | |
1017 | .name = "int64", | |
1018 | .get = get_int64, | |
1019 | .put = put_int64, | |
1020 | }; | |
1021 | ||
1022 | /* 8 bit unsigned int */ | |
1023 | ||
1024 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
1025 | { | |
1026 | uint8_t *v = pv; | |
1027 | qemu_get_8s(f, v); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
84e2e3eb | 1031 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1032 | { |
84e2e3eb | 1033 | uint8_t *v = pv; |
9ed7d6ae JQ |
1034 | qemu_put_8s(f, v); |
1035 | } | |
1036 | ||
1037 | const VMStateInfo vmstate_info_uint8 = { | |
1038 | .name = "uint8", | |
1039 | .get = get_uint8, | |
1040 | .put = put_uint8, | |
1041 | }; | |
1042 | ||
1043 | /* 16 bit unsigned int */ | |
1044 | ||
1045 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
1046 | { | |
1047 | uint16_t *v = pv; | |
1048 | qemu_get_be16s(f, v); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
84e2e3eb | 1052 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1053 | { |
84e2e3eb | 1054 | uint16_t *v = pv; |
9ed7d6ae JQ |
1055 | qemu_put_be16s(f, v); |
1056 | } | |
1057 | ||
1058 | const VMStateInfo vmstate_info_uint16 = { | |
1059 | .name = "uint16", | |
1060 | .get = get_uint16, | |
1061 | .put = put_uint16, | |
1062 | }; | |
1063 | ||
1064 | /* 32 bit unsigned int */ | |
1065 | ||
1066 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
1067 | { | |
1068 | uint32_t *v = pv; | |
1069 | qemu_get_be32s(f, v); | |
1070 | return 0; | |
1071 | } | |
1072 | ||
84e2e3eb | 1073 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1074 | { |
84e2e3eb | 1075 | uint32_t *v = pv; |
9ed7d6ae JQ |
1076 | qemu_put_be32s(f, v); |
1077 | } | |
1078 | ||
1079 | const VMStateInfo vmstate_info_uint32 = { | |
1080 | .name = "uint32", | |
1081 | .get = get_uint32, | |
1082 | .put = put_uint32, | |
1083 | }; | |
1084 | ||
9122a8fe JQ |
1085 | /* 32 bit uint. See that the received value is the same than the one |
1086 | in the field */ | |
1087 | ||
1088 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1089 | { | |
1090 | uint32_t *v = pv; | |
1091 | uint32_t v2; | |
1092 | qemu_get_be32s(f, &v2); | |
1093 | ||
1094 | if (*v == v2) { | |
1095 | return 0; | |
1096 | } | |
1097 | return -EINVAL; | |
1098 | } | |
1099 | ||
1100 | const VMStateInfo vmstate_info_uint32_equal = { | |
1101 | .name = "uint32 equal", | |
1102 | .get = get_uint32_equal, | |
1103 | .put = put_uint32, | |
1104 | }; | |
1105 | ||
9ed7d6ae JQ |
1106 | /* 64 bit unsigned int */ |
1107 | ||
1108 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1109 | { | |
1110 | uint64_t *v = pv; | |
1111 | qemu_get_be64s(f, v); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
84e2e3eb | 1115 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1116 | { |
84e2e3eb | 1117 | uint64_t *v = pv; |
9ed7d6ae JQ |
1118 | qemu_put_be64s(f, v); |
1119 | } | |
1120 | ||
1121 | const VMStateInfo vmstate_info_uint64 = { | |
1122 | .name = "uint64", | |
1123 | .get = get_uint64, | |
1124 | .put = put_uint64, | |
1125 | }; | |
1126 | ||
e344b8a1 DG |
1127 | /* 64 bit unsigned int. See that the received value is the same than the one |
1128 | in the field */ | |
1129 | ||
1130 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) | |
1131 | { | |
1132 | uint64_t *v = pv; | |
1133 | uint64_t v2; | |
1134 | qemu_get_be64s(f, &v2); | |
1135 | ||
1136 | if (*v == v2) { | |
1137 | return 0; | |
1138 | } | |
1139 | return -EINVAL; | |
1140 | } | |
1141 | ||
1142 | const VMStateInfo vmstate_info_uint64_equal = { | |
1143 | .name = "int64 equal", | |
1144 | .get = get_uint64_equal, | |
1145 | .put = put_uint64, | |
1146 | }; | |
1147 | ||
80cd83e7 JQ |
1148 | /* 8 bit int. See that the received value is the same than the one |
1149 | in the field */ | |
1150 | ||
1151 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1152 | { | |
1153 | uint8_t *v = pv; | |
1154 | uint8_t v2; | |
1155 | qemu_get_8s(f, &v2); | |
1156 | ||
1157 | if (*v == v2) | |
1158 | return 0; | |
1159 | return -EINVAL; | |
1160 | } | |
1161 | ||
1162 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1163 | .name = "uint8 equal", |
80cd83e7 JQ |
1164 | .get = get_uint8_equal, |
1165 | .put = put_uint8, | |
1166 | }; | |
1167 | ||
dc3b83a0 JQ |
1168 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1169 | in the field */ | |
1170 | ||
1171 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1172 | { | |
1173 | uint16_t *v = pv; | |
1174 | uint16_t v2; | |
1175 | qemu_get_be16s(f, &v2); | |
1176 | ||
1177 | if (*v == v2) | |
1178 | return 0; | |
1179 | return -EINVAL; | |
1180 | } | |
1181 | ||
1182 | const VMStateInfo vmstate_info_uint16_equal = { | |
1183 | .name = "uint16 equal", | |
1184 | .get = get_uint16_equal, | |
1185 | .put = put_uint16, | |
1186 | }; | |
1187 | ||
213945e4 DG |
1188 | /* floating point */ |
1189 | ||
1190 | static int get_float64(QEMUFile *f, void *pv, size_t size) | |
1191 | { | |
1192 | float64 *v = pv; | |
1193 | ||
1194 | *v = make_float64(qemu_get_be64(f)); | |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | static void put_float64(QEMUFile *f, void *pv, size_t size) | |
1199 | { | |
1200 | uint64_t *v = pv; | |
1201 | ||
1202 | qemu_put_be64(f, float64_val(*v)); | |
1203 | } | |
1204 | ||
1205 | const VMStateInfo vmstate_info_float64 = { | |
1206 | .name = "float64", | |
1207 | .get = get_float64, | |
1208 | .put = put_float64, | |
1209 | }; | |
1210 | ||
dde0463b JQ |
1211 | /* timers */ |
1212 | ||
1213 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1214 | { | |
1215 | QEMUTimer *v = pv; | |
1216 | qemu_get_timer(f, v); | |
1217 | return 0; | |
1218 | } | |
1219 | ||
84e2e3eb | 1220 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1221 | { |
84e2e3eb | 1222 | QEMUTimer *v = pv; |
dde0463b JQ |
1223 | qemu_put_timer(f, v); |
1224 | } | |
1225 | ||
1226 | const VMStateInfo vmstate_info_timer = { | |
1227 | .name = "timer", | |
1228 | .get = get_timer, | |
1229 | .put = put_timer, | |
1230 | }; | |
1231 | ||
6f67c50f JQ |
1232 | /* uint8_t buffers */ |
1233 | ||
1234 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1235 | { | |
1236 | uint8_t *v = pv; | |
1237 | qemu_get_buffer(f, v, size); | |
1238 | return 0; | |
1239 | } | |
1240 | ||
84e2e3eb | 1241 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1242 | { |
84e2e3eb | 1243 | uint8_t *v = pv; |
6f67c50f JQ |
1244 | qemu_put_buffer(f, v, size); |
1245 | } | |
1246 | ||
1247 | const VMStateInfo vmstate_info_buffer = { | |
1248 | .name = "buffer", | |
1249 | .get = get_buffer, | |
1250 | .put = put_buffer, | |
1251 | }; | |
1252 | ||
76507c75 | 1253 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1254 | not useful anymore */ |
76507c75 JQ |
1255 | |
1256 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1257 | { | |
21174c34 JK |
1258 | uint8_t buf[1024]; |
1259 | int block_len; | |
1260 | ||
1261 | while (size > 0) { | |
1262 | block_len = MIN(sizeof(buf), size); | |
1263 | size -= block_len; | |
1264 | qemu_get_buffer(f, buf, block_len); | |
1265 | } | |
1266 | return 0; | |
76507c75 JQ |
1267 | } |
1268 | ||
1269 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1270 | { | |
21174c34 JK |
1271 | static const uint8_t buf[1024]; |
1272 | int block_len; | |
1273 | ||
1274 | while (size > 0) { | |
1275 | block_len = MIN(sizeof(buf), size); | |
1276 | size -= block_len; | |
1277 | qemu_put_buffer(f, buf, block_len); | |
1278 | } | |
76507c75 JQ |
1279 | } |
1280 | ||
1281 | const VMStateInfo vmstate_info_unused_buffer = { | |
1282 | .name = "unused_buffer", | |
1283 | .get = get_unused_buffer, | |
1284 | .put = put_unused_buffer, | |
1285 | }; | |
1286 | ||
08e99e29 PM |
1287 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1288 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1289 | * bit words with the bits in big endian order. The in-memory format | |
1290 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1291 | */ | |
1292 | /* This is the number of 64 bit words sent over the wire */ | |
1293 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1294 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1295 | { | |
1296 | unsigned long *bmp = pv; | |
1297 | int i, idx = 0; | |
1298 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1299 | uint64_t w = qemu_get_be64(f); | |
1300 | bmp[idx++] = w; | |
1301 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1302 | bmp[idx++] = w >> 32; | |
1303 | } | |
1304 | } | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1309 | { | |
1310 | unsigned long *bmp = pv; | |
1311 | int i, idx = 0; | |
1312 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1313 | uint64_t w = bmp[idx++]; | |
1314 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1315 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1316 | } | |
1317 | qemu_put_be64(f, w); | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | const VMStateInfo vmstate_info_bitmap = { | |
1322 | .name = "bitmap", | |
1323 | .get = get_bitmap, | |
1324 | .put = put_bitmap, | |
1325 | }; | |
1326 | ||
7685ee6a AW |
1327 | typedef struct CompatEntry { |
1328 | char idstr[256]; | |
1329 | int instance_id; | |
1330 | } CompatEntry; | |
1331 | ||
a672b469 | 1332 | typedef struct SaveStateEntry { |
72cf2d4f | 1333 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1334 | char idstr[256]; |
1335 | int instance_id; | |
4d2ffa08 | 1336 | int alias_id; |
a672b469 AL |
1337 | int version_id; |
1338 | int section_id; | |
22ea40f4 | 1339 | SaveVMHandlers *ops; |
9ed7d6ae | 1340 | const VMStateDescription *vmsd; |
a672b469 | 1341 | void *opaque; |
7685ee6a | 1342 | CompatEntry *compat; |
24312968 | 1343 | int no_migrate; |
a7ae8355 | 1344 | int is_ram; |
a672b469 AL |
1345 | } SaveStateEntry; |
1346 | ||
c163b5ca | 1347 | |
72cf2d4f BS |
1348 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1349 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1350 | static int global_section_id; |
a672b469 | 1351 | |
8718e999 JQ |
1352 | static int calculate_new_instance_id(const char *idstr) |
1353 | { | |
1354 | SaveStateEntry *se; | |
1355 | int instance_id = 0; | |
1356 | ||
72cf2d4f | 1357 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1358 | if (strcmp(idstr, se->idstr) == 0 |
1359 | && instance_id <= se->instance_id) { | |
1360 | instance_id = se->instance_id + 1; | |
1361 | } | |
1362 | } | |
1363 | return instance_id; | |
1364 | } | |
1365 | ||
7685ee6a AW |
1366 | static int calculate_compat_instance_id(const char *idstr) |
1367 | { | |
1368 | SaveStateEntry *se; | |
1369 | int instance_id = 0; | |
1370 | ||
1371 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1372 | if (!se->compat) | |
1373 | continue; | |
1374 | ||
1375 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1376 | && instance_id <= se->compat->instance_id) { | |
1377 | instance_id = se->compat->instance_id + 1; | |
1378 | } | |
1379 | } | |
1380 | return instance_id; | |
1381 | } | |
1382 | ||
a672b469 AL |
1383 | /* TODO: Individual devices generally have very little idea about the rest |
1384 | of the system, so instance_id should be removed/replaced. | |
1385 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1386 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1387 | int register_savevm_live(DeviceState *dev, |
1388 | const char *idstr, | |
a672b469 AL |
1389 | int instance_id, |
1390 | int version_id, | |
7908c78d | 1391 | SaveVMHandlers *ops, |
a672b469 AL |
1392 | void *opaque) |
1393 | { | |
8718e999 | 1394 | SaveStateEntry *se; |
a672b469 | 1395 | |
7267c094 | 1396 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1397 | se->version_id = version_id; |
1398 | se->section_id = global_section_id++; | |
7908c78d | 1399 | se->ops = ops; |
a672b469 | 1400 | se->opaque = opaque; |
9ed7d6ae | 1401 | se->vmsd = NULL; |
24312968 | 1402 | se->no_migrate = 0; |
a7ae8355 | 1403 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1404 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1405 | se->is_ram = 1; |
1406 | } | |
a672b469 | 1407 | |
09e5ab63 AL |
1408 | if (dev) { |
1409 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1410 | if (id) { |
1411 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1412 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1413 | g_free(id); |
7685ee6a | 1414 | |
7267c094 | 1415 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1416 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1417 | se->compat->instance_id = instance_id == -1 ? | |
1418 | calculate_compat_instance_id(idstr) : instance_id; | |
1419 | instance_id = -1; | |
1420 | } | |
1421 | } | |
1422 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1423 | ||
8718e999 | 1424 | if (instance_id == -1) { |
7685ee6a | 1425 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1426 | } else { |
1427 | se->instance_id = instance_id; | |
a672b469 | 1428 | } |
7685ee6a | 1429 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1430 | /* add at the end of list */ |
72cf2d4f | 1431 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1432 | return 0; |
1433 | } | |
1434 | ||
0be71e32 AW |
1435 | int register_savevm(DeviceState *dev, |
1436 | const char *idstr, | |
a672b469 AL |
1437 | int instance_id, |
1438 | int version_id, | |
1439 | SaveStateHandler *save_state, | |
1440 | LoadStateHandler *load_state, | |
1441 | void *opaque) | |
1442 | { | |
7908c78d JQ |
1443 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1444 | ops->save_state = save_state; | |
1445 | ops->load_state = load_state; | |
0be71e32 | 1446 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1447 | ops, opaque); |
a672b469 AL |
1448 | } |
1449 | ||
0be71e32 | 1450 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1451 | { |
8718e999 | 1452 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1453 | char id[256] = ""; |
1454 | ||
09e5ab63 AL |
1455 | if (dev) { |
1456 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1457 | if (path) { |
1458 | pstrcpy(id, sizeof(id), path); | |
1459 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1460 | g_free(path); |
7685ee6a AW |
1461 | } |
1462 | } | |
1463 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1464 | |
72cf2d4f | 1465 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1466 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1467 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1468 | if (se->compat) { |
7267c094 | 1469 | g_free(se->compat); |
69e58af9 | 1470 | } |
22ea40f4 | 1471 | g_free(se->ops); |
7267c094 | 1472 | g_free(se); |
41bd13af | 1473 | } |
41bd13af AL |
1474 | } |
1475 | } | |
1476 | ||
0be71e32 | 1477 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1478 | const VMStateDescription *vmsd, |
1479 | void *opaque, int alias_id, | |
1480 | int required_for_version) | |
9ed7d6ae | 1481 | { |
8718e999 | 1482 | SaveStateEntry *se; |
9ed7d6ae | 1483 | |
4d2ffa08 JK |
1484 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1485 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1486 | ||
7267c094 | 1487 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1488 | se->version_id = vmsd->version_id; |
1489 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1490 | se->opaque = opaque; |
1491 | se->vmsd = vmsd; | |
4d2ffa08 | 1492 | se->alias_id = alias_id; |
2837c8ea | 1493 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1494 | |
09e5ab63 AL |
1495 | if (dev) { |
1496 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1497 | if (id) { |
1498 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1499 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1500 | g_free(id); |
7685ee6a | 1501 | |
7267c094 | 1502 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1503 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1504 | se->compat->instance_id = instance_id == -1 ? | |
1505 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1506 | instance_id = -1; | |
1507 | } | |
1508 | } | |
1509 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1510 | ||
8718e999 | 1511 | if (instance_id == -1) { |
7685ee6a | 1512 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1513 | } else { |
1514 | se->instance_id = instance_id; | |
9ed7d6ae | 1515 | } |
7685ee6a | 1516 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1517 | /* add at the end of list */ |
72cf2d4f | 1518 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1519 | return 0; |
1520 | } | |
1521 | ||
0be71e32 AW |
1522 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1523 | void *opaque) | |
9ed7d6ae | 1524 | { |
1eb7538b JQ |
1525 | SaveStateEntry *se, *new_se; |
1526 | ||
72cf2d4f | 1527 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1528 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1529 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1530 | if (se->compat) { |
7267c094 | 1531 | g_free(se->compat); |
69e58af9 | 1532 | } |
7267c094 | 1533 | g_free(se); |
1eb7538b JQ |
1534 | } |
1535 | } | |
9ed7d6ae JQ |
1536 | } |
1537 | ||
811814bd JQ |
1538 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1539 | void *opaque); | |
1540 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1541 | void *opaque); | |
1542 | ||
9ed7d6ae JQ |
1543 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1544 | void *opaque, int version_id) | |
1545 | { | |
1546 | VMStateField *field = vmsd->fields; | |
811814bd | 1547 | int ret; |
9ed7d6ae JQ |
1548 | |
1549 | if (version_id > vmsd->version_id) { | |
1550 | return -EINVAL; | |
1551 | } | |
1552 | if (version_id < vmsd->minimum_version_id_old) { | |
1553 | return -EINVAL; | |
1554 | } | |
1555 | if (version_id < vmsd->minimum_version_id) { | |
1556 | return vmsd->load_state_old(f, opaque, version_id); | |
1557 | } | |
fd4d52de JQ |
1558 | if (vmsd->pre_load) { |
1559 | int ret = vmsd->pre_load(opaque); | |
1560 | if (ret) | |
1561 | return ret; | |
1562 | } | |
9ed7d6ae | 1563 | while(field->name) { |
f11f6a5f JQ |
1564 | if ((field->field_exists && |
1565 | field->field_exists(opaque, version_id)) || | |
1566 | (!field->field_exists && | |
1567 | field->version_id <= version_id)) { | |
f752a6aa | 1568 | void *base_addr = opaque + field->offset; |
811814bd | 1569 | int i, n_elems = 1; |
e61a1e0a | 1570 | int size = field->size; |
9ed7d6ae | 1571 | |
e61a1e0a JQ |
1572 | if (field->flags & VMS_VBUFFER) { |
1573 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1574 | if (field->flags & VMS_MULTIPLY) { |
1575 | size *= field->size; | |
1576 | } | |
e61a1e0a | 1577 | } |
f752a6aa JQ |
1578 | if (field->flags & VMS_ARRAY) { |
1579 | n_elems = field->num; | |
d6698281 JQ |
1580 | } else if (field->flags & VMS_VARRAY_INT32) { |
1581 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1582 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1583 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1584 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1585 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1586 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1587 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1588 | } |
dde0463b | 1589 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1590 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1591 | } |
f752a6aa | 1592 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1593 | void *addr = base_addr + size * i; |
ec245e21 | 1594 | |
19df438b JQ |
1595 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1596 | addr = *(void **)addr; | |
1597 | } | |
ec245e21 | 1598 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1599 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1600 | } else { |
e61a1e0a | 1601 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1602 | |
1603 | } | |
f752a6aa JQ |
1604 | if (ret < 0) { |
1605 | return ret; | |
1606 | } | |
9ed7d6ae JQ |
1607 | } |
1608 | } | |
1609 | field++; | |
1610 | } | |
811814bd JQ |
1611 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1612 | if (ret != 0) { | |
1613 | return ret; | |
1614 | } | |
752ff2fa | 1615 | if (vmsd->post_load) { |
e59fb374 | 1616 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1617 | } |
9ed7d6ae JQ |
1618 | return 0; |
1619 | } | |
1620 | ||
1621 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1622 | void *opaque) |
9ed7d6ae JQ |
1623 | { |
1624 | VMStateField *field = vmsd->fields; | |
1625 | ||
8fb0791d JQ |
1626 | if (vmsd->pre_save) { |
1627 | vmsd->pre_save(opaque); | |
1628 | } | |
9ed7d6ae | 1629 | while(field->name) { |
f11f6a5f JQ |
1630 | if (!field->field_exists || |
1631 | field->field_exists(opaque, vmsd->version_id)) { | |
1632 | void *base_addr = opaque + field->offset; | |
1633 | int i, n_elems = 1; | |
e61a1e0a | 1634 | int size = field->size; |
dde0463b | 1635 | |
e61a1e0a JQ |
1636 | if (field->flags & VMS_VBUFFER) { |
1637 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1638 | if (field->flags & VMS_MULTIPLY) { |
1639 | size *= field->size; | |
1640 | } | |
e61a1e0a | 1641 | } |
f11f6a5f JQ |
1642 | if (field->flags & VMS_ARRAY) { |
1643 | n_elems = field->num; | |
d6698281 JQ |
1644 | } else if (field->flags & VMS_VARRAY_INT32) { |
1645 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1646 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1647 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1648 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1649 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1650 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1651 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1652 | } |
1653 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1654 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1655 | } |
1656 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1657 | void *addr = base_addr + size * i; |
ec245e21 | 1658 | |
8595387e JQ |
1659 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1660 | addr = *(void **)addr; | |
1661 | } | |
f11f6a5f JQ |
1662 | if (field->flags & VMS_STRUCT) { |
1663 | vmstate_save_state(f, field->vmsd, addr); | |
1664 | } else { | |
e61a1e0a | 1665 | field->info->put(f, addr, size); |
f11f6a5f | 1666 | } |
ec245e21 | 1667 | } |
dde0463b | 1668 | } |
9ed7d6ae JQ |
1669 | field++; |
1670 | } | |
811814bd | 1671 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1672 | } |
1673 | ||
4082be4d JQ |
1674 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1675 | { | |
9ed7d6ae | 1676 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1677 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1678 | } |
1679 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1680 | } |
1681 | ||
dc912121 | 1682 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1683 | { |
9ed7d6ae | 1684 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1685 | se->ops->save_state(f, se->opaque); |
dc912121 | 1686 | return; |
9ed7d6ae JQ |
1687 | } |
1688 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1689 | } |
1690 | ||
a672b469 AL |
1691 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1692 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1693 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1694 | ||
1695 | #define QEMU_VM_EOF 0x00 | |
1696 | #define QEMU_VM_SECTION_START 0x01 | |
1697 | #define QEMU_VM_SECTION_PART 0x02 | |
1698 | #define QEMU_VM_SECTION_END 0x03 | |
1699 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1700 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1701 | |
e1c37d0e | 1702 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1703 | { |
1704 | SaveStateEntry *se; | |
1705 | ||
1706 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1707 | if (se->no_migrate) { | |
e1c37d0e | 1708 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1709 | return true; |
1710 | } | |
1711 | } | |
1712 | return false; | |
1713 | } | |
1714 | ||
47c8c17a PB |
1715 | void qemu_savevm_state_begin(QEMUFile *f, |
1716 | const MigrationParams *params) | |
a672b469 AL |
1717 | { |
1718 | SaveStateEntry *se; | |
39346385 | 1719 | int ret; |
a672b469 | 1720 | |
c163b5ca | 1721 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1722 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1723 | continue; |
6607ae23 | 1724 | } |
22ea40f4 | 1725 | se->ops->set_params(params, se->opaque); |
c163b5ca LS |
1726 | } |
1727 | ||
a672b469 AL |
1728 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1729 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1730 | ||
72cf2d4f | 1731 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1732 | int len; |
1733 | ||
d1315aac | 1734 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1735 | continue; |
22ea40f4 | 1736 | } |
6bd68781 JQ |
1737 | if (se->ops && se->ops->is_active) { |
1738 | if (!se->ops->is_active(se->opaque)) { | |
1739 | continue; | |
1740 | } | |
1741 | } | |
a672b469 AL |
1742 | /* Section type */ |
1743 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1744 | qemu_put_be32(f, se->section_id); | |
1745 | ||
1746 | /* ID string */ | |
1747 | len = strlen(se->idstr); | |
1748 | qemu_put_byte(f, len); | |
1749 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1750 | ||
1751 | qemu_put_be32(f, se->instance_id); | |
1752 | qemu_put_be32(f, se->version_id); | |
1753 | ||
d1315aac | 1754 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1755 | if (ret < 0) { |
47c8c17a PB |
1756 | qemu_file_set_error(f, ret); |
1757 | break; | |
2975725f | 1758 | } |
a672b469 | 1759 | } |
a672b469 AL |
1760 | } |
1761 | ||
39346385 | 1762 | /* |
07f35073 | 1763 | * this function has three return values: |
39346385 JQ |
1764 | * negative: there was one error, and we have -errno. |
1765 | * 0 : We haven't finished, caller have to go again | |
1766 | * 1 : We have finished, we can go to complete phase | |
1767 | */ | |
539de124 | 1768 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1769 | { |
1770 | SaveStateEntry *se; | |
1771 | int ret = 1; | |
1772 | ||
72cf2d4f | 1773 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1774 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1775 | continue; |
22ea40f4 | 1776 | } |
6bd68781 JQ |
1777 | if (se->ops && se->ops->is_active) { |
1778 | if (!se->ops->is_active(se->opaque)) { | |
1779 | continue; | |
1780 | } | |
1781 | } | |
aac844ed JQ |
1782 | if (qemu_file_rate_limit(f)) { |
1783 | return 0; | |
1784 | } | |
517a13c9 | 1785 | trace_savevm_section_start(); |
a672b469 AL |
1786 | /* Section type */ |
1787 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1788 | qemu_put_be32(f, se->section_id); | |
1789 | ||
16310a3c | 1790 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1791 | trace_savevm_section_end(se->section_id); |
1792 | ||
47c8c17a PB |
1793 | if (ret < 0) { |
1794 | qemu_file_set_error(f, ret); | |
1795 | } | |
2975725f | 1796 | if (ret <= 0) { |
90697be8 JK |
1797 | /* Do not proceed to the next vmstate before this one reported |
1798 | completion of the current stage. This serializes the migration | |
1799 | and reduces the probability that a faster changing state is | |
1800 | synchronized over and over again. */ | |
1801 | break; | |
1802 | } | |
a672b469 | 1803 | } |
39346385 | 1804 | return ret; |
a672b469 AL |
1805 | } |
1806 | ||
47c8c17a | 1807 | void qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1808 | { |
1809 | SaveStateEntry *se; | |
2975725f | 1810 | int ret; |
a672b469 | 1811 | |
ea375f9a JK |
1812 | cpu_synchronize_all_states(); |
1813 | ||
72cf2d4f | 1814 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1815 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1816 | continue; |
22ea40f4 | 1817 | } |
6bd68781 JQ |
1818 | if (se->ops && se->ops->is_active) { |
1819 | if (!se->ops->is_active(se->opaque)) { | |
1820 | continue; | |
1821 | } | |
1822 | } | |
517a13c9 | 1823 | trace_savevm_section_start(); |
a672b469 AL |
1824 | /* Section type */ |
1825 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1826 | qemu_put_be32(f, se->section_id); | |
1827 | ||
16310a3c | 1828 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1829 | trace_savevm_section_end(se->section_id); |
2975725f | 1830 | if (ret < 0) { |
47c8c17a PB |
1831 | qemu_file_set_error(f, ret); |
1832 | return; | |
2975725f | 1833 | } |
a672b469 AL |
1834 | } |
1835 | ||
72cf2d4f | 1836 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1837 | int len; |
1838 | ||
22ea40f4 | 1839 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1840 | continue; |
22ea40f4 | 1841 | } |
517a13c9 | 1842 | trace_savevm_section_start(); |
a672b469 AL |
1843 | /* Section type */ |
1844 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1845 | qemu_put_be32(f, se->section_id); | |
1846 | ||
1847 | /* ID string */ | |
1848 | len = strlen(se->idstr); | |
1849 | qemu_put_byte(f, len); | |
1850 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1851 | ||
1852 | qemu_put_be32(f, se->instance_id); | |
1853 | qemu_put_be32(f, se->version_id); | |
1854 | ||
dc912121 | 1855 | vmstate_save(f, se); |
517a13c9 | 1856 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1857 | } |
1858 | ||
1859 | qemu_put_byte(f, QEMU_VM_EOF); | |
edaae611 | 1860 | qemu_fflush(f); |
a672b469 AL |
1861 | } |
1862 | ||
e4ed1541 JQ |
1863 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1864 | { | |
1865 | SaveStateEntry *se; | |
1866 | uint64_t ret = 0; | |
1867 | ||
1868 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1869 | if (!se->ops || !se->ops->save_live_pending) { | |
1870 | continue; | |
1871 | } | |
1872 | if (se->ops && se->ops->is_active) { | |
1873 | if (!se->ops->is_active(se->opaque)) { | |
1874 | continue; | |
1875 | } | |
1876 | } | |
1877 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1878 | } | |
1879 | return ret; | |
1880 | } | |
1881 | ||
6522773f | 1882 | void qemu_savevm_state_cancel(void) |
4ec7fcc7 JK |
1883 | { |
1884 | SaveStateEntry *se; | |
1885 | ||
1886 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1887 | if (se->ops && se->ops->cancel) { |
1888 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1889 | } |
1890 | } | |
1891 | } | |
1892 | ||
e1c37d0e | 1893 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1894 | { |
a672b469 | 1895 | int ret; |
6607ae23 IY |
1896 | MigrationParams params = { |
1897 | .blk = 0, | |
1898 | .shared = 0 | |
1899 | }; | |
a672b469 | 1900 | |
e1c37d0e | 1901 | if (qemu_savevm_state_blocked(NULL)) { |
04943eba | 1902 | return -EINVAL; |
dc912121 AW |
1903 | } |
1904 | ||
9b095037 | 1905 | qemu_mutex_unlock_iothread(); |
47c8c17a | 1906 | qemu_savevm_state_begin(f, ¶ms); |
9b095037 PB |
1907 | qemu_mutex_lock_iothread(); |
1908 | ||
47c8c17a PB |
1909 | while (qemu_file_get_error(f) == 0) { |
1910 | if (qemu_savevm_state_iterate(f) > 0) { | |
1911 | break; | |
1912 | } | |
1913 | } | |
a672b469 | 1914 | |
47c8c17a | 1915 | ret = qemu_file_get_error(f); |
39346385 | 1916 | if (ret == 0) { |
47c8c17a | 1917 | qemu_savevm_state_complete(f); |
624b9cc2 | 1918 | ret = qemu_file_get_error(f); |
39346385 | 1919 | } |
04943eba PB |
1920 | if (ret != 0) { |
1921 | qemu_savevm_state_cancel(); | |
1922 | } | |
a672b469 AL |
1923 | return ret; |
1924 | } | |
1925 | ||
a7ae8355 SS |
1926 | static int qemu_save_device_state(QEMUFile *f) |
1927 | { | |
1928 | SaveStateEntry *se; | |
1929 | ||
1930 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1931 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1932 | ||
1933 | cpu_synchronize_all_states(); | |
1934 | ||
1935 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1936 | int len; | |
1937 | ||
1938 | if (se->is_ram) { | |
1939 | continue; | |
1940 | } | |
22ea40f4 | 1941 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1942 | continue; |
1943 | } | |
1944 | ||
1945 | /* Section type */ | |
1946 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1947 | qemu_put_be32(f, se->section_id); | |
1948 | ||
1949 | /* ID string */ | |
1950 | len = strlen(se->idstr); | |
1951 | qemu_put_byte(f, len); | |
1952 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1953 | ||
1954 | qemu_put_be32(f, se->instance_id); | |
1955 | qemu_put_be32(f, se->version_id); | |
1956 | ||
1957 | vmstate_save(f, se); | |
1958 | } | |
1959 | ||
1960 | qemu_put_byte(f, QEMU_VM_EOF); | |
1961 | ||
1962 | return qemu_file_get_error(f); | |
1963 | } | |
1964 | ||
a672b469 AL |
1965 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1966 | { | |
1967 | SaveStateEntry *se; | |
1968 | ||
72cf2d4f | 1969 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1970 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1971 | (instance_id == se->instance_id || |
1972 | instance_id == se->alias_id)) | |
a672b469 | 1973 | return se; |
7685ee6a AW |
1974 | /* Migrating from an older version? */ |
1975 | if (strstr(se->idstr, idstr) && se->compat) { | |
1976 | if (!strcmp(se->compat->idstr, idstr) && | |
1977 | (instance_id == se->compat->instance_id || | |
1978 | instance_id == se->alias_id)) | |
1979 | return se; | |
1980 | } | |
a672b469 AL |
1981 | } |
1982 | return NULL; | |
1983 | } | |
1984 | ||
811814bd JQ |
1985 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1986 | { | |
1987 | while(sub && sub->needed) { | |
1988 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1989 | return sub->vmsd; | |
1990 | } | |
1991 | sub++; | |
1992 | } | |
1993 | return NULL; | |
1994 | } | |
1995 | ||
1996 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1997 | void *opaque) | |
1998 | { | |
c6380724 | 1999 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
2000 | char idstr[256]; |
2001 | int ret; | |
c6380724 | 2002 | uint8_t version_id, len, size; |
811814bd JQ |
2003 | const VMStateDescription *sub_vmsd; |
2004 | ||
c6380724 JQ |
2005 | len = qemu_peek_byte(f, 1); |
2006 | if (len < strlen(vmsd->name) + 1) { | |
2007 | /* subsection name has be be "section_name/a" */ | |
2008 | return 0; | |
2009 | } | |
2010 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
2011 | if (size != len) { | |
2012 | return 0; | |
2013 | } | |
2014 | idstr[size] = 0; | |
811814bd | 2015 | |
c6380724 JQ |
2016 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
2017 | /* it don't have a valid subsection name */ | |
2018 | return 0; | |
2019 | } | |
3da9eebd | 2020 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
2021 | if (sub_vmsd == NULL) { |
2022 | return -ENOENT; | |
2023 | } | |
c6380724 JQ |
2024 | qemu_file_skip(f, 1); /* subsection */ |
2025 | qemu_file_skip(f, 1); /* len */ | |
2026 | qemu_file_skip(f, len); /* idstr */ | |
2027 | version_id = qemu_get_be32(f); | |
2028 | ||
811814bd JQ |
2029 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
2030 | if (ret) { | |
2031 | return ret; | |
2032 | } | |
2033 | } | |
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
2038 | void *opaque) | |
2039 | { | |
2040 | const VMStateSubsection *sub = vmsd->subsections; | |
2041 | ||
2042 | while (sub && sub->needed) { | |
2043 | if (sub->needed(opaque)) { | |
2044 | const VMStateDescription *vmsd = sub->vmsd; | |
2045 | uint8_t len; | |
2046 | ||
2047 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
2048 | len = strlen(vmsd->name); | |
2049 | qemu_put_byte(f, len); | |
2050 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
2051 | qemu_put_be32(f, vmsd->version_id); | |
2052 | vmstate_save_state(f, vmsd, opaque); | |
2053 | } | |
2054 | sub++; | |
2055 | } | |
2056 | } | |
2057 | ||
a672b469 | 2058 | typedef struct LoadStateEntry { |
72cf2d4f | 2059 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
2060 | SaveStateEntry *se; |
2061 | int section_id; | |
2062 | int version_id; | |
a672b469 AL |
2063 | } LoadStateEntry; |
2064 | ||
a672b469 AL |
2065 | int qemu_loadvm_state(QEMUFile *f) |
2066 | { | |
72cf2d4f BS |
2067 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
2068 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 2069 | LoadStateEntry *le, *new_le; |
a672b469 AL |
2070 | uint8_t section_type; |
2071 | unsigned int v; | |
2072 | int ret; | |
2073 | ||
e1c37d0e | 2074 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
2075 | return -EINVAL; |
2076 | } | |
2077 | ||
a672b469 AL |
2078 | v = qemu_get_be32(f); |
2079 | if (v != QEMU_VM_FILE_MAGIC) | |
2080 | return -EINVAL; | |
2081 | ||
2082 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
2083 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
2084 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
2085 | return -ENOTSUP; | |
2086 | } | |
a672b469 AL |
2087 | if (v != QEMU_VM_FILE_VERSION) |
2088 | return -ENOTSUP; | |
2089 | ||
2090 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
2091 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
2092 | SaveStateEntry *se; |
2093 | char idstr[257]; | |
2094 | int len; | |
2095 | ||
2096 | switch (section_type) { | |
2097 | case QEMU_VM_SECTION_START: | |
2098 | case QEMU_VM_SECTION_FULL: | |
2099 | /* Read section start */ | |
2100 | section_id = qemu_get_be32(f); | |
2101 | len = qemu_get_byte(f); | |
2102 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
2103 | idstr[len] = 0; | |
2104 | instance_id = qemu_get_be32(f); | |
2105 | version_id = qemu_get_be32(f); | |
2106 | ||
2107 | /* Find savevm section */ | |
2108 | se = find_se(idstr, instance_id); | |
2109 | if (se == NULL) { | |
2110 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
2111 | ret = -EINVAL; | |
2112 | goto out; | |
2113 | } | |
2114 | ||
2115 | /* Validate version */ | |
2116 | if (version_id > se->version_id) { | |
2117 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
2118 | version_id, idstr, se->version_id); | |
2119 | ret = -EINVAL; | |
2120 | goto out; | |
2121 | } | |
2122 | ||
2123 | /* Add entry */ | |
7267c094 | 2124 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
2125 | |
2126 | le->se = se; | |
2127 | le->section_id = section_id; | |
2128 | le->version_id = version_id; | |
72cf2d4f | 2129 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 2130 | |
4082be4d | 2131 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2132 | if (ret < 0) { |
2133 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
2134 | instance_id, idstr); | |
2135 | goto out; | |
2136 | } | |
a672b469 AL |
2137 | break; |
2138 | case QEMU_VM_SECTION_PART: | |
2139 | case QEMU_VM_SECTION_END: | |
2140 | section_id = qemu_get_be32(f); | |
2141 | ||
72cf2d4f | 2142 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
2143 | if (le->section_id == section_id) { |
2144 | break; | |
2145 | } | |
2146 | } | |
a672b469 AL |
2147 | if (le == NULL) { |
2148 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
2149 | ret = -EINVAL; | |
2150 | goto out; | |
2151 | } | |
2152 | ||
4082be4d | 2153 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2154 | if (ret < 0) { |
2155 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2156 | section_id); | |
2157 | goto out; | |
2158 | } | |
a672b469 AL |
2159 | break; |
2160 | default: | |
2161 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2162 | ret = -EINVAL; | |
2163 | goto out; | |
2164 | } | |
2165 | } | |
2166 | ||
ea375f9a JK |
2167 | cpu_synchronize_all_post_init(); |
2168 | ||
a672b469 AL |
2169 | ret = 0; |
2170 | ||
2171 | out: | |
72cf2d4f BS |
2172 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2173 | QLIST_REMOVE(le, entry); | |
7267c094 | 2174 | g_free(le); |
a672b469 AL |
2175 | } |
2176 | ||
42802d47 JQ |
2177 | if (ret == 0) { |
2178 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2179 | } |
a672b469 AL |
2180 | |
2181 | return ret; | |
2182 | } | |
2183 | ||
a672b469 AL |
2184 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2185 | const char *name) | |
2186 | { | |
2187 | QEMUSnapshotInfo *sn_tab, *sn; | |
2188 | int nb_sns, i, ret; | |
2189 | ||
2190 | ret = -ENOENT; | |
2191 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2192 | if (nb_sns < 0) | |
2193 | return ret; | |
2194 | for(i = 0; i < nb_sns; i++) { | |
2195 | sn = &sn_tab[i]; | |
2196 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2197 | *sn_info = *sn; | |
2198 | ret = 0; | |
2199 | break; | |
2200 | } | |
2201 | } | |
7267c094 | 2202 | g_free(sn_tab); |
a672b469 AL |
2203 | return ret; |
2204 | } | |
2205 | ||
cb499fb2 KW |
2206 | /* |
2207 | * Deletes snapshots of a given name in all opened images. | |
2208 | */ | |
2209 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2210 | { | |
2211 | BlockDriverState *bs; | |
cb499fb2 KW |
2212 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2213 | int ret; | |
2214 | ||
dbc13590 MA |
2215 | bs = NULL; |
2216 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2217 | if (bdrv_can_snapshot(bs) && |
2218 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2219 | { | |
2220 | ret = bdrv_snapshot_delete(bs, name); | |
2221 | if (ret < 0) { | |
2222 | monitor_printf(mon, | |
2223 | "Error while deleting snapshot on '%s'\n", | |
2224 | bdrv_get_device_name(bs)); | |
2225 | return -1; | |
2226 | } | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | return 0; | |
2231 | } | |
2232 | ||
d54908a5 | 2233 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2234 | { |
2235 | BlockDriverState *bs, *bs1; | |
2236 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2237 | int ret; |
a672b469 AL |
2238 | QEMUFile *f; |
2239 | int saved_vm_running; | |
c2c9a466 | 2240 | uint64_t vm_state_size; |
68b891ec | 2241 | qemu_timeval tv; |
7d631a11 | 2242 | struct tm tm; |
d54908a5 | 2243 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2244 | |
feeee5ac | 2245 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2246 | bs = NULL; |
2247 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2248 | |
07b70bfb | 2249 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2250 | continue; |
2251 | } | |
2252 | ||
2253 | if (!bdrv_can_snapshot(bs)) { | |
2254 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2255 | bdrv_get_device_name(bs)); | |
2256 | return; | |
2257 | } | |
2258 | } | |
2259 | ||
f9092b10 | 2260 | bs = bdrv_snapshots(); |
a672b469 | 2261 | if (!bs) { |
376253ec | 2262 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2263 | return; |
2264 | } | |
a672b469 | 2265 | |
1354869c | 2266 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2267 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2268 | |
cb499fb2 | 2269 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2270 | |
2271 | /* fill auxiliary fields */ | |
68b891ec | 2272 | qemu_gettimeofday(&tv); |
a672b469 AL |
2273 | sn->date_sec = tv.tv_sec; |
2274 | sn->date_nsec = tv.tv_usec * 1000; | |
74475455 | 2275 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2276 | |
7d631a11 MDCF |
2277 | if (name) { |
2278 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2279 | if (ret >= 0) { | |
2280 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2281 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2282 | } else { | |
2283 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2284 | } | |
2285 | } else { | |
d7d9b528 BS |
2286 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2287 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 | 2288 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
7d631a11 MDCF |
2289 | } |
2290 | ||
cb499fb2 | 2291 | /* Delete old snapshots of the same name */ |
f139a412 | 2292 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2293 | goto the_end; |
2294 | } | |
2295 | ||
a672b469 | 2296 | /* save the VM state */ |
45566e9c | 2297 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2298 | if (!f) { |
376253ec | 2299 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2300 | goto the_end; |
2301 | } | |
e1c37d0e | 2302 | ret = qemu_savevm_state(f); |
2d22b18f | 2303 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2304 | qemu_fclose(f); |
2305 | if (ret < 0) { | |
376253ec | 2306 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2307 | goto the_end; |
2308 | } | |
2309 | ||
2310 | /* create the snapshots */ | |
2311 | ||
dbc13590 MA |
2312 | bs1 = NULL; |
2313 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2314 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2315 | /* Write VM state size only to the image that contains the state */ |
2316 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2317 | ret = bdrv_snapshot_create(bs1, sn); |
2318 | if (ret < 0) { | |
376253ec AL |
2319 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2320 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2321 | } |
2322 | } | |
2323 | } | |
2324 | ||
2325 | the_end: | |
2326 | if (saved_vm_running) | |
2327 | vm_start(); | |
2328 | } | |
2329 | ||
a7ae8355 SS |
2330 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2331 | { | |
2332 | QEMUFile *f; | |
2333 | int saved_vm_running; | |
2334 | int ret; | |
2335 | ||
2336 | saved_vm_running = runstate_is_running(); | |
2337 | vm_stop(RUN_STATE_SAVE_VM); | |
2338 | ||
2339 | f = qemu_fopen(filename, "wb"); | |
2340 | if (!f) { | |
2341 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2342 | goto the_end; | |
2343 | } | |
2344 | ret = qemu_save_device_state(f); | |
2345 | qemu_fclose(f); | |
2346 | if (ret < 0) { | |
2347 | error_set(errp, QERR_IO_ERROR); | |
2348 | } | |
2349 | ||
2350 | the_end: | |
2351 | if (saved_vm_running) | |
2352 | vm_start(); | |
a7ae8355 SS |
2353 | } |
2354 | ||
03cd4655 | 2355 | int load_vmstate(const char *name) |
a672b469 | 2356 | { |
f0aa7a8b | 2357 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2358 | QEMUSnapshotInfo sn; |
a672b469 | 2359 | QEMUFile *f; |
751c6a17 | 2360 | int ret; |
a672b469 | 2361 | |
f0aa7a8b MDCF |
2362 | bs_vm_state = bdrv_snapshots(); |
2363 | if (!bs_vm_state) { | |
2364 | error_report("No block device supports snapshots"); | |
2365 | return -ENOTSUP; | |
2366 | } | |
2367 | ||
2368 | /* Don't even try to load empty VM states */ | |
2369 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2370 | if (ret < 0) { | |
2371 | return ret; | |
2372 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2373 | error_report("This is a disk-only snapshot. Revert to it offline " |
2374 | "using qemu-img."); | |
f0aa7a8b MDCF |
2375 | return -EINVAL; |
2376 | } | |
2377 | ||
2378 | /* Verify if there is any device that doesn't support snapshots and is | |
2379 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2380 | bs = NULL; |
2381 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2382 | |
07b70bfb | 2383 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2384 | continue; |
2385 | } | |
2386 | ||
2387 | if (!bdrv_can_snapshot(bs)) { | |
2388 | error_report("Device '%s' is writable but does not support snapshots.", | |
2389 | bdrv_get_device_name(bs)); | |
2390 | return -ENOTSUP; | |
2391 | } | |
feeee5ac | 2392 | |
f0aa7a8b MDCF |
2393 | ret = bdrv_snapshot_find(bs, &sn, name); |
2394 | if (ret < 0) { | |
2395 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2396 | bdrv_get_device_name(bs), name); | |
2397 | return ret; | |
2398 | } | |
a672b469 AL |
2399 | } |
2400 | ||
2401 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2402 | bdrv_drain_all(); |
a672b469 | 2403 | |
f0aa7a8b MDCF |
2404 | bs = NULL; |
2405 | while ((bs = bdrv_next(bs))) { | |
2406 | if (bdrv_can_snapshot(bs)) { | |
2407 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2408 | if (ret < 0) { |
f0aa7a8b MDCF |
2409 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2410 | ret, name, bdrv_get_device_name(bs)); | |
2411 | return ret; | |
a672b469 AL |
2412 | } |
2413 | } | |
2414 | } | |
2415 | ||
a672b469 | 2416 | /* restore the VM state */ |
f0aa7a8b | 2417 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2418 | if (!f) { |
1ecda02b | 2419 | error_report("Could not open VM state file"); |
05f2401e | 2420 | return -EINVAL; |
a672b469 | 2421 | } |
f0aa7a8b | 2422 | |
5a8a49d7 | 2423 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2424 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2425 | |
a672b469 AL |
2426 | qemu_fclose(f); |
2427 | if (ret < 0) { | |
1ecda02b | 2428 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2429 | return ret; |
a672b469 | 2430 | } |
f0aa7a8b | 2431 | |
05f2401e | 2432 | return 0; |
7b630349 JQ |
2433 | } |
2434 | ||
d54908a5 | 2435 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2436 | { |
2437 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2438 | int ret; |
d54908a5 | 2439 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2440 | |
f9092b10 | 2441 | bs = bdrv_snapshots(); |
a672b469 | 2442 | if (!bs) { |
376253ec | 2443 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2444 | return; |
2445 | } | |
2446 | ||
dbc13590 MA |
2447 | bs1 = NULL; |
2448 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2449 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2450 | ret = bdrv_snapshot_delete(bs1, name); |
2451 | if (ret < 0) { | |
2452 | if (ret == -ENOTSUP) | |
376253ec AL |
2453 | monitor_printf(mon, |
2454 | "Snapshots not supported on device '%s'\n", | |
2455 | bdrv_get_device_name(bs1)); | |
a672b469 | 2456 | else |
376253ec AL |
2457 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2458 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2459 | } |
2460 | } | |
2461 | } | |
2462 | } | |
2463 | ||
84f2d0ea | 2464 | void do_info_snapshots(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2465 | { |
2466 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2467 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2468 | int nb_sns, i, ret, available; | |
2469 | int total; | |
2470 | int *available_snapshots; | |
a672b469 AL |
2471 | char buf[256]; |
2472 | ||
f9092b10 | 2473 | bs = bdrv_snapshots(); |
a672b469 | 2474 | if (!bs) { |
376253ec | 2475 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2476 | return; |
2477 | } | |
a672b469 AL |
2478 | |
2479 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2480 | if (nb_sns < 0) { | |
376253ec | 2481 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2482 | return; |
2483 | } | |
f9209915 MDCF |
2484 | |
2485 | if (nb_sns == 0) { | |
2486 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2487 | return; | |
2488 | } | |
2489 | ||
7267c094 | 2490 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2491 | total = 0; |
2492 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2493 | sn = &sn_tab[i]; |
f9209915 MDCF |
2494 | available = 1; |
2495 | bs1 = NULL; | |
2496 | ||
2497 | while ((bs1 = bdrv_next(bs1))) { | |
2498 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2499 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2500 | if (ret < 0) { | |
2501 | available = 0; | |
2502 | break; | |
2503 | } | |
2504 | } | |
2505 | } | |
2506 | ||
2507 | if (available) { | |
2508 | available_snapshots[total] = i; | |
2509 | total++; | |
2510 | } | |
a672b469 | 2511 | } |
f9209915 MDCF |
2512 | |
2513 | if (total > 0) { | |
2514 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2515 | for (i = 0; i < total; i++) { | |
2516 | sn = &sn_tab[available_snapshots[i]]; | |
2517 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2518 | } | |
2519 | } else { | |
2520 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2521 | } | |
2522 | ||
7267c094 AL |
2523 | g_free(sn_tab); |
2524 | g_free(available_snapshots); | |
f9209915 | 2525 | |
a672b469 | 2526 | } |
c5705a77 AK |
2527 | |
2528 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2529 | { | |
1ddde087 | 2530 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2531 | memory_region_name(mr), dev); |
2532 | } | |
2533 | ||
2534 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2535 | { | |
2536 | /* Nothing do to while the implementation is in RAMBlock */ | |
2537 | } | |
2538 | ||
2539 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2540 | { | |
2541 | vmstate_register_ram(mr, NULL); | |
2542 | } |