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Commit | Line | Data |
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a672b469 AL |
1 | /* |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
a672b469 | 24 | |
d40cdb10 | 25 | #include "config-host.h" |
511d2b14 BS |
26 | #include "qemu-common.h" |
27 | #include "hw/hw.h" | |
7685ee6a | 28 | #include "hw/qdev.h" |
1422e32d | 29 | #include "net/net.h" |
83c9089e | 30 | #include "monitor/monitor.h" |
9c17d615 | 31 | #include "sysemu/sysemu.h" |
1de7afc9 | 32 | #include "qemu/timer.h" |
511d2b14 | 33 | #include "audio/audio.h" |
caf71f86 | 34 | #include "migration/migration.h" |
1de7afc9 PB |
35 | #include "qemu/sockets.h" |
36 | #include "qemu/queue.h" | |
9c17d615 | 37 | #include "sysemu/cpus.h" |
022c62cb | 38 | #include "exec/memory.h" |
a7ae8355 | 39 | #include "qmp-commands.h" |
517a13c9 | 40 | #include "trace.h" |
1de7afc9 | 41 | #include "qemu/bitops.h" |
511d2b14 | 42 | |
a672b469 | 43 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 44 | |
18995b98 | 45 | #ifndef ETH_P_RARP |
f8778a77 | 46 | #define ETH_P_RARP 0x8035 |
18995b98 N |
47 | #endif |
48 | #define ARP_HTYPE_ETH 0x0001 | |
49 | #define ARP_PTYPE_IP 0x0800 | |
50 | #define ARP_OP_REQUEST_REV 0x3 | |
51 | ||
52 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
53 | uint8_t *mac_addr) |
54 | { | |
18995b98 N |
55 | /* Ethernet header. */ |
56 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
57 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
58 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
59 | ||
60 | /* RARP header. */ | |
61 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
62 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
63 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
64 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
65 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
66 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
67 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
68 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
69 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
70 | ||
71 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
72 | memset(buf + 42, 0x00, 18); | |
73 | ||
74 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
75 | } |
76 | ||
f401ca22 | 77 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 78 | { |
18995b98 | 79 | uint8_t buf[60]; |
f401ca22 MM |
80 | int len; |
81 | ||
82 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
83 | ||
84 | qemu_send_packet_raw(&nic->nc, buf, len); | |
85 | } | |
86 | ||
87 | ||
88 | static void qemu_announce_self_once(void *opaque) | |
89 | { | |
ed8b330b GN |
90 | static int count = SELF_ANNOUNCE_ROUNDS; |
91 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 92 | |
f401ca22 MM |
93 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
94 | ||
18995b98 N |
95 | if (--count) { |
96 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 97 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 98 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
99 | } else { |
100 | qemu_del_timer(timer); | |
101 | qemu_free_timer(timer); | |
102 | } | |
103 | } | |
104 | ||
105 | void qemu_announce_self(void) | |
106 | { | |
107 | static QEMUTimer *timer; | |
7bd427d8 | 108 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 109 | qemu_announce_self_once(&timer); |
a672b469 AL |
110 | } |
111 | ||
112 | /***********************************************************/ | |
113 | /* savevm/loadvm support */ | |
114 | ||
115 | #define IO_BUF_SIZE 32768 | |
116 | ||
117 | struct QEMUFile { | |
9229bf3c | 118 | const QEMUFileOps *ops; |
a672b469 AL |
119 | void *opaque; |
120 | int is_write; | |
121 | ||
122 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
123 | when reading */ | |
124 | int buf_index; | |
125 | int buf_size; /* 0 when writing */ | |
126 | uint8_t buf[IO_BUF_SIZE]; | |
127 | ||
3961b4dd | 128 | int last_error; |
a672b469 AL |
129 | }; |
130 | ||
7f79dd28 | 131 | typedef struct QEMUFileStdio |
a672b469 | 132 | { |
7f79dd28 | 133 | FILE *stdio_file; |
a672b469 | 134 | QEMUFile *file; |
7f79dd28 | 135 | } QEMUFileStdio; |
a672b469 AL |
136 | |
137 | typedef struct QEMUFileSocket | |
138 | { | |
139 | int fd; | |
140 | QEMUFile *file; | |
141 | } QEMUFileSocket; | |
142 | ||
70eb6330 PB |
143 | static int socket_get_fd(void *opaque) |
144 | { | |
145 | QEMUFileSocket *s = opaque; | |
146 | ||
147 | return s->fd; | |
148 | } | |
149 | ||
a672b469 AL |
150 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
151 | { | |
152 | QEMUFileSocket *s = opaque; | |
153 | ssize_t len; | |
154 | ||
595ab641 | 155 | for (;;) { |
00aa0040 | 156 | len = qemu_recv(s->fd, buf, size, 0); |
595ab641 PB |
157 | if (len != -1) { |
158 | break; | |
159 | } | |
160 | if (socket_error() == EAGAIN) { | |
161 | assert(qemu_in_coroutine()); | |
162 | qemu_coroutine_yield(); | |
163 | } else if (socket_error() != EINTR) { | |
164 | break; | |
165 | } | |
166 | } | |
a672b469 | 167 | |
595ab641 | 168 | if (len == -1) { |
a672b469 | 169 | len = -socket_error(); |
595ab641 | 170 | } |
a672b469 AL |
171 | return len; |
172 | } | |
173 | ||
174 | static int socket_close(void *opaque) | |
175 | { | |
176 | QEMUFileSocket *s = opaque; | |
ab52a824 | 177 | closesocket(s->fd); |
7267c094 | 178 | g_free(s); |
a672b469 AL |
179 | return 0; |
180 | } | |
181 | ||
70eb6330 PB |
182 | static int stdio_get_fd(void *opaque) |
183 | { | |
184 | QEMUFileStdio *s = opaque; | |
185 | ||
186 | return fileno(s->stdio_file); | |
187 | } | |
188 | ||
7f79dd28 | 189 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 190 | { |
7f79dd28 PB |
191 | QEMUFileStdio *s = opaque; |
192 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
193 | } |
194 | ||
7f79dd28 | 195 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 196 | { |
7f79dd28 PB |
197 | QEMUFileStdio *s = opaque; |
198 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
199 | int bytes; |
200 | ||
595ab641 | 201 | for (;;) { |
8a67ec4d UL |
202 | clearerr(fp); |
203 | bytes = fread(buf, 1, size, fp); | |
595ab641 PB |
204 | if (bytes != 0 || !ferror(fp)) { |
205 | break; | |
206 | } | |
207 | if (errno == EAGAIN) { | |
208 | assert(qemu_in_coroutine()); | |
209 | qemu_coroutine_yield(); | |
210 | } else if (errno != EINTR) { | |
211 | break; | |
212 | } | |
213 | } | |
8a67ec4d | 214 | return bytes; |
a672b469 AL |
215 | } |
216 | ||
7f79dd28 PB |
217 | static int stdio_pclose(void *opaque) |
218 | { | |
219 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
220 | int ret; |
221 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
222 | if (ret == -1) { |
223 | ret = -errno; | |
224 | } | |
7267c094 | 225 | g_free(s); |
41ef56e6 | 226 | return ret; |
7f79dd28 PB |
227 | } |
228 | ||
229 | static int stdio_fclose(void *opaque) | |
a672b469 | 230 | { |
7f79dd28 | 231 | QEMUFileStdio *s = opaque; |
0e286705 EH |
232 | int ret = 0; |
233 | if (fclose(s->stdio_file) == EOF) { | |
234 | ret = -errno; | |
235 | } | |
7267c094 | 236 | g_free(s); |
0e286705 | 237 | return ret; |
a672b469 AL |
238 | } |
239 | ||
9229bf3c | 240 | static const QEMUFileOps stdio_pipe_read_ops = { |
70eb6330 | 241 | .get_fd = stdio_get_fd, |
9229bf3c PB |
242 | .get_buffer = stdio_get_buffer, |
243 | .close = stdio_pclose | |
244 | }; | |
245 | ||
246 | static const QEMUFileOps stdio_pipe_write_ops = { | |
70eb6330 | 247 | .get_fd = stdio_get_fd, |
9229bf3c PB |
248 | .put_buffer = stdio_put_buffer, |
249 | .close = stdio_pclose | |
250 | }; | |
251 | ||
7f79dd28 | 252 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 253 | { |
7f79dd28 | 254 | QEMUFileStdio *s; |
a672b469 | 255 | |
7f79dd28 | 256 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
257 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
258 | return NULL; | |
259 | } | |
260 | ||
7267c094 | 261 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 262 | |
7f79dd28 | 263 | s->stdio_file = stdio_file; |
a672b469 AL |
264 | |
265 | if(mode[0] == 'r') { | |
9229bf3c | 266 | s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
a672b469 | 267 | } else { |
9229bf3c | 268 | s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
a672b469 | 269 | } |
a672b469 AL |
270 | return s->file; |
271 | } | |
272 | ||
273 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
274 | { | |
275 | FILE *popen_file; | |
276 | ||
277 | popen_file = popen(command, mode); | |
278 | if(popen_file == NULL) { | |
279 | return NULL; | |
280 | } | |
281 | ||
282 | return qemu_popen(popen_file, mode); | |
283 | } | |
284 | ||
9229bf3c | 285 | static const QEMUFileOps stdio_file_read_ops = { |
70eb6330 | 286 | .get_fd = stdio_get_fd, |
9229bf3c PB |
287 | .get_buffer = stdio_get_buffer, |
288 | .close = stdio_fclose | |
289 | }; | |
290 | ||
291 | static const QEMUFileOps stdio_file_write_ops = { | |
70eb6330 | 292 | .get_fd = stdio_get_fd, |
9229bf3c PB |
293 | .put_buffer = stdio_put_buffer, |
294 | .close = stdio_fclose | |
295 | }; | |
296 | ||
5ac1fad3 PB |
297 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
298 | { | |
299 | QEMUFileStdio *s; | |
300 | ||
301 | if (mode == NULL || | |
302 | (mode[0] != 'r' && mode[0] != 'w') || | |
303 | mode[1] != 'b' || mode[2] != 0) { | |
304 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
305 | return NULL; | |
306 | } | |
307 | ||
7267c094 | 308 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
309 | s->stdio_file = fdopen(fd, mode); |
310 | if (!s->stdio_file) | |
311 | goto fail; | |
312 | ||
313 | if(mode[0] == 'r') { | |
9229bf3c | 314 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
5ac1fad3 | 315 | } else { |
9229bf3c | 316 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
5ac1fad3 PB |
317 | } |
318 | return s->file; | |
319 | ||
320 | fail: | |
7267c094 | 321 | g_free(s); |
5ac1fad3 PB |
322 | return NULL; |
323 | } | |
324 | ||
9229bf3c | 325 | static const QEMUFileOps socket_read_ops = { |
70eb6330 | 326 | .get_fd = socket_get_fd, |
9229bf3c PB |
327 | .get_buffer = socket_get_buffer, |
328 | .close = socket_close | |
329 | }; | |
330 | ||
a672b469 AL |
331 | QEMUFile *qemu_fopen_socket(int fd) |
332 | { | |
7267c094 | 333 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 334 | |
a672b469 | 335 | s->fd = fd; |
9229bf3c | 336 | s->file = qemu_fopen_ops(s, &socket_read_ops); |
a672b469 AL |
337 | return s->file; |
338 | } | |
339 | ||
a672b469 AL |
340 | QEMUFile *qemu_fopen(const char *filename, const char *mode) |
341 | { | |
342 | QEMUFileStdio *s; | |
343 | ||
7f79dd28 PB |
344 | if (mode == NULL || |
345 | (mode[0] != 'r' && mode[0] != 'w') || | |
346 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 347 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
348 | return NULL; |
349 | } | |
350 | ||
7267c094 | 351 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 352 | |
7f79dd28 PB |
353 | s->stdio_file = fopen(filename, mode); |
354 | if (!s->stdio_file) | |
a672b469 | 355 | goto fail; |
c163b5ca | 356 | |
7f79dd28 | 357 | if(mode[0] == 'w') { |
9229bf3c | 358 | s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
7f79dd28 | 359 | } else { |
9229bf3c | 360 | s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
7f79dd28 PB |
361 | } |
362 | return s->file; | |
a672b469 | 363 | fail: |
7267c094 | 364 | g_free(s); |
a672b469 AL |
365 | return NULL; |
366 | } | |
367 | ||
178e08a5 | 368 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
369 | int64_t pos, int size) |
370 | { | |
45566e9c | 371 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
372 | return size; |
373 | } | |
374 | ||
178e08a5 | 375 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 376 | { |
45566e9c | 377 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
378 | } |
379 | ||
380 | static int bdrv_fclose(void *opaque) | |
381 | { | |
ad492c92 | 382 | return bdrv_flush(opaque); |
a672b469 AL |
383 | } |
384 | ||
9229bf3c PB |
385 | static const QEMUFileOps bdrv_read_ops = { |
386 | .get_buffer = block_get_buffer, | |
387 | .close = bdrv_fclose | |
388 | }; | |
389 | ||
390 | static const QEMUFileOps bdrv_write_ops = { | |
391 | .put_buffer = block_put_buffer, | |
392 | .close = bdrv_fclose | |
393 | }; | |
394 | ||
45566e9c | 395 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 396 | { |
a672b469 | 397 | if (is_writable) |
9229bf3c PB |
398 | return qemu_fopen_ops(bs, &bdrv_write_ops); |
399 | return qemu_fopen_ops(bs, &bdrv_read_ops); | |
a672b469 AL |
400 | } |
401 | ||
9229bf3c | 402 | QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
a672b469 AL |
403 | { |
404 | QEMUFile *f; | |
405 | ||
7267c094 | 406 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
407 | |
408 | f->opaque = opaque; | |
9229bf3c | 409 | f->ops = ops; |
a672b469 AL |
410 | f->is_write = 0; |
411 | ||
412 | return f; | |
413 | } | |
414 | ||
624b9cc2 | 415 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 416 | { |
3961b4dd | 417 | return f->last_error; |
a672b469 AL |
418 | } |
419 | ||
6f121ff5 | 420 | static void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 421 | { |
3961b4dd | 422 | f->last_error = ret; |
4dabe248 AL |
423 | } |
424 | ||
d82ca915 EH |
425 | /** Flushes QEMUFile buffer |
426 | * | |
d82ca915 | 427 | */ |
7311bea3 | 428 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 429 | { |
7311bea3 JQ |
430 | int ret = 0; |
431 | ||
9229bf3c | 432 | if (!f->ops->put_buffer) |
7311bea3 | 433 | return 0; |
a672b469 AL |
434 | |
435 | if (f->is_write && f->buf_index > 0) { | |
9229bf3c | 436 | ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
7311bea3 | 437 | if (ret >= 0) { |
a672b469 | 438 | f->buf_offset += f->buf_index; |
7311bea3 | 439 | } |
a672b469 AL |
440 | f->buf_index = 0; |
441 | } | |
7311bea3 | 442 | return ret; |
a672b469 AL |
443 | } |
444 | ||
445 | static void qemu_fill_buffer(QEMUFile *f) | |
446 | { | |
447 | int len; | |
0046c45b | 448 | int pending; |
a672b469 | 449 | |
9229bf3c | 450 | if (!f->ops->get_buffer) |
a672b469 AL |
451 | return; |
452 | ||
453 | if (f->is_write) | |
454 | abort(); | |
455 | ||
0046c45b JQ |
456 | pending = f->buf_size - f->buf_index; |
457 | if (pending > 0) { | |
458 | memmove(f->buf, f->buf + f->buf_index, pending); | |
459 | } | |
460 | f->buf_index = 0; | |
461 | f->buf_size = pending; | |
462 | ||
9229bf3c | 463 | len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
0046c45b | 464 | IO_BUF_SIZE - pending); |
a672b469 | 465 | if (len > 0) { |
0046c45b | 466 | f->buf_size += len; |
a672b469 | 467 | f->buf_offset += len; |
fa39a30f | 468 | } else if (len == 0) { |
02c4a051 | 469 | qemu_file_set_error(f, -EIO); |
a672b469 | 470 | } else if (len != -EAGAIN) |
c29110d5 | 471 | qemu_file_set_error(f, len); |
a672b469 AL |
472 | } |
473 | ||
70eb6330 PB |
474 | int qemu_get_fd(QEMUFile *f) |
475 | { | |
476 | if (f->ops->get_fd) { | |
477 | return f->ops->get_fd(f->opaque); | |
478 | } | |
479 | return -1; | |
480 | } | |
481 | ||
d82ca915 EH |
482 | /** Closes the file |
483 | * | |
484 | * Returns negative error value if any error happened on previous operations or | |
485 | * while closing the file. Returns 0 or positive number on success. | |
486 | * | |
487 | * The meaning of return value on success depends on the specific backend | |
488 | * being used. | |
489 | */ | |
490 | int qemu_fclose(QEMUFile *f) | |
491 | { | |
29eee86f | 492 | int ret; |
7311bea3 | 493 | ret = qemu_fflush(f); |
7311bea3 | 494 | |
9229bf3c PB |
495 | if (f->ops->close) { |
496 | int ret2 = f->ops->close(f->opaque); | |
29eee86f JQ |
497 | if (ret >= 0) { |
498 | ret = ret2; | |
499 | } | |
7311bea3 | 500 | } |
d82ca915 EH |
501 | /* If any error was spotted before closing, we should report it |
502 | * instead of the close() return value. | |
503 | */ | |
504 | if (f->last_error) { | |
505 | ret = f->last_error; | |
506 | } | |
7267c094 | 507 | g_free(f); |
a672b469 AL |
508 | return ret; |
509 | } | |
510 | ||
a672b469 AL |
511 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
512 | { | |
513 | int l; | |
514 | ||
c10682cb JQ |
515 | if (f->last_error) { |
516 | return; | |
517 | } | |
518 | ||
519 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
520 | fprintf(stderr, |
521 | "Attempted to write to buffer while read buffer is not empty\n"); | |
522 | abort(); | |
523 | } | |
524 | ||
c10682cb | 525 | while (size > 0) { |
a672b469 AL |
526 | l = IO_BUF_SIZE - f->buf_index; |
527 | if (l > size) | |
528 | l = size; | |
529 | memcpy(f->buf + f->buf_index, buf, l); | |
530 | f->is_write = 1; | |
531 | f->buf_index += l; | |
532 | buf += l; | |
533 | size -= l; | |
7311bea3 JQ |
534 | if (f->buf_index >= IO_BUF_SIZE) { |
535 | int ret = qemu_fflush(f); | |
c10682cb JQ |
536 | if (ret < 0) { |
537 | qemu_file_set_error(f, ret); | |
538 | break; | |
539 | } | |
7311bea3 | 540 | } |
a672b469 AL |
541 | } |
542 | } | |
543 | ||
544 | void qemu_put_byte(QEMUFile *f, int v) | |
545 | { | |
c10682cb JQ |
546 | if (f->last_error) { |
547 | return; | |
548 | } | |
549 | ||
550 | if (f->is_write == 0 && f->buf_index > 0) { | |
a672b469 AL |
551 | fprintf(stderr, |
552 | "Attempted to write to buffer while read buffer is not empty\n"); | |
553 | abort(); | |
554 | } | |
555 | ||
556 | f->buf[f->buf_index++] = v; | |
557 | f->is_write = 1; | |
7311bea3 JQ |
558 | if (f->buf_index >= IO_BUF_SIZE) { |
559 | int ret = qemu_fflush(f); | |
c10682cb JQ |
560 | if (ret < 0) { |
561 | qemu_file_set_error(f, ret); | |
562 | } | |
7311bea3 | 563 | } |
a672b469 AL |
564 | } |
565 | ||
c6380724 | 566 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 567 | { |
c6380724 JQ |
568 | if (f->buf_index + size <= f->buf_size) { |
569 | f->buf_index += size; | |
570 | } | |
571 | } | |
572 | ||
573 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 574 | { |
c6380724 JQ |
575 | int pending; |
576 | int index; | |
a672b469 | 577 | |
b9ce1454 | 578 | if (f->is_write) { |
a672b469 | 579 | abort(); |
b9ce1454 | 580 | } |
a672b469 | 581 | |
c6380724 JQ |
582 | index = f->buf_index + offset; |
583 | pending = f->buf_size - index; | |
584 | if (pending < size) { | |
585 | qemu_fill_buffer(f); | |
586 | index = f->buf_index + offset; | |
587 | pending = f->buf_size - index; | |
588 | } | |
589 | ||
590 | if (pending <= 0) { | |
591 | return 0; | |
592 | } | |
593 | if (size > pending) { | |
594 | size = pending; | |
595 | } | |
596 | ||
597 | memcpy(buf, f->buf + index, size); | |
598 | return size; | |
599 | } | |
600 | ||
601 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
602 | { | |
603 | int pending = size; | |
604 | int done = 0; | |
605 | ||
606 | while (pending > 0) { | |
607 | int res; | |
608 | ||
609 | res = qemu_peek_buffer(f, buf, pending, 0); | |
610 | if (res == 0) { | |
611 | return done; | |
a672b469 | 612 | } |
c6380724 JQ |
613 | qemu_file_skip(f, res); |
614 | buf += res; | |
615 | pending -= res; | |
616 | done += res; | |
a672b469 | 617 | } |
c6380724 | 618 | return done; |
a672b469 AL |
619 | } |
620 | ||
c6380724 | 621 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 622 | { |
c6380724 JQ |
623 | int index = f->buf_index + offset; |
624 | ||
b9ce1454 | 625 | if (f->is_write) { |
811814bd | 626 | abort(); |
b9ce1454 | 627 | } |
811814bd | 628 | |
c6380724 | 629 | if (index >= f->buf_size) { |
811814bd | 630 | qemu_fill_buffer(f); |
c6380724 JQ |
631 | index = f->buf_index + offset; |
632 | if (index >= f->buf_size) { | |
811814bd | 633 | return 0; |
b9ce1454 | 634 | } |
811814bd | 635 | } |
c6380724 | 636 | return f->buf[index]; |
811814bd JQ |
637 | } |
638 | ||
a672b469 AL |
639 | int qemu_get_byte(QEMUFile *f) |
640 | { | |
65f3bb3d | 641 | int result; |
a672b469 | 642 | |
c6380724 JQ |
643 | result = qemu_peek_byte(f, 0); |
644 | qemu_file_skip(f, 1); | |
65f3bb3d | 645 | return result; |
a672b469 AL |
646 | } |
647 | ||
3aee4be1 | 648 | static int64_t qemu_ftell(QEMUFile *f) |
a672b469 AL |
649 | { |
650 | return f->buf_offset - f->buf_size + f->buf_index; | |
651 | } | |
652 | ||
a672b469 AL |
653 | int qemu_file_rate_limit(QEMUFile *f) |
654 | { | |
9229bf3c PB |
655 | if (f->ops->rate_limit) |
656 | return f->ops->rate_limit(f->opaque); | |
a672b469 AL |
657 | |
658 | return 0; | |
659 | } | |
660 | ||
3d002df3 | 661 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca | 662 | { |
9229bf3c PB |
663 | if (f->ops->get_rate_limit) |
664 | return f->ops->get_rate_limit(f->opaque); | |
c163b5ca | 665 | |
666 | return 0; | |
667 | } | |
668 | ||
3d002df3 | 669 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 670 | { |
0bb05eaf GC |
671 | /* any failed or completed migration keeps its state to allow probing of |
672 | * migration data, but has no associated file anymore */ | |
9229bf3c PB |
673 | if (f && f->ops->set_rate_limit) |
674 | return f->ops->set_rate_limit(f->opaque, new_rate); | |
19629537 GC |
675 | |
676 | return 0; | |
677 | } | |
678 | ||
a672b469 AL |
679 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
680 | { | |
681 | qemu_put_byte(f, v >> 8); | |
682 | qemu_put_byte(f, v); | |
683 | } | |
684 | ||
685 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
686 | { | |
687 | qemu_put_byte(f, v >> 24); | |
688 | qemu_put_byte(f, v >> 16); | |
689 | qemu_put_byte(f, v >> 8); | |
690 | qemu_put_byte(f, v); | |
691 | } | |
692 | ||
693 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
694 | { | |
695 | qemu_put_be32(f, v >> 32); | |
696 | qemu_put_be32(f, v); | |
697 | } | |
698 | ||
699 | unsigned int qemu_get_be16(QEMUFile *f) | |
700 | { | |
701 | unsigned int v; | |
702 | v = qemu_get_byte(f) << 8; | |
703 | v |= qemu_get_byte(f); | |
704 | return v; | |
705 | } | |
706 | ||
707 | unsigned int qemu_get_be32(QEMUFile *f) | |
708 | { | |
709 | unsigned int v; | |
710 | v = qemu_get_byte(f) << 24; | |
711 | v |= qemu_get_byte(f) << 16; | |
712 | v |= qemu_get_byte(f) << 8; | |
713 | v |= qemu_get_byte(f); | |
714 | return v; | |
715 | } | |
716 | ||
717 | uint64_t qemu_get_be64(QEMUFile *f) | |
718 | { | |
719 | uint64_t v; | |
720 | v = (uint64_t)qemu_get_be32(f) << 32; | |
721 | v |= qemu_get_be32(f); | |
722 | return v; | |
723 | } | |
724 | ||
2ff68d07 PB |
725 | |
726 | /* timer */ | |
727 | ||
728 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
729 | { | |
730 | uint64_t expire_time; | |
731 | ||
732 | expire_time = qemu_timer_expire_time_ns(ts); | |
733 | qemu_put_be64(f, expire_time); | |
734 | } | |
735 | ||
736 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
737 | { | |
738 | uint64_t expire_time; | |
739 | ||
740 | expire_time = qemu_get_be64(f); | |
741 | if (expire_time != -1) { | |
742 | qemu_mod_timer_ns(ts, expire_time); | |
743 | } else { | |
744 | qemu_del_timer(ts); | |
745 | } | |
746 | } | |
747 | ||
748 | ||
cdae5cfb GH |
749 | /* bool */ |
750 | ||
751 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
752 | { | |
753 | bool *v = pv; | |
754 | *v = qemu_get_byte(f); | |
755 | return 0; | |
756 | } | |
757 | ||
758 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
759 | { | |
760 | bool *v = pv; | |
761 | qemu_put_byte(f, *v); | |
762 | } | |
763 | ||
764 | const VMStateInfo vmstate_info_bool = { | |
765 | .name = "bool", | |
766 | .get = get_bool, | |
767 | .put = put_bool, | |
768 | }; | |
769 | ||
9ed7d6ae JQ |
770 | /* 8 bit int */ |
771 | ||
772 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
773 | { | |
774 | int8_t *v = pv; | |
775 | qemu_get_s8s(f, v); | |
776 | return 0; | |
777 | } | |
778 | ||
84e2e3eb | 779 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 780 | { |
84e2e3eb | 781 | int8_t *v = pv; |
9ed7d6ae JQ |
782 | qemu_put_s8s(f, v); |
783 | } | |
784 | ||
785 | const VMStateInfo vmstate_info_int8 = { | |
786 | .name = "int8", | |
787 | .get = get_int8, | |
788 | .put = put_int8, | |
789 | }; | |
790 | ||
791 | /* 16 bit int */ | |
792 | ||
793 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
794 | { | |
795 | int16_t *v = pv; | |
796 | qemu_get_sbe16s(f, v); | |
797 | return 0; | |
798 | } | |
799 | ||
84e2e3eb | 800 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 801 | { |
84e2e3eb | 802 | int16_t *v = pv; |
9ed7d6ae JQ |
803 | qemu_put_sbe16s(f, v); |
804 | } | |
805 | ||
806 | const VMStateInfo vmstate_info_int16 = { | |
807 | .name = "int16", | |
808 | .get = get_int16, | |
809 | .put = put_int16, | |
810 | }; | |
811 | ||
812 | /* 32 bit int */ | |
813 | ||
814 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
815 | { | |
816 | int32_t *v = pv; | |
817 | qemu_get_sbe32s(f, v); | |
818 | return 0; | |
819 | } | |
820 | ||
84e2e3eb | 821 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 822 | { |
84e2e3eb | 823 | int32_t *v = pv; |
9ed7d6ae JQ |
824 | qemu_put_sbe32s(f, v); |
825 | } | |
826 | ||
827 | const VMStateInfo vmstate_info_int32 = { | |
828 | .name = "int32", | |
829 | .get = get_int32, | |
830 | .put = put_int32, | |
831 | }; | |
832 | ||
82501660 JQ |
833 | /* 32 bit int. See that the received value is the same than the one |
834 | in the field */ | |
835 | ||
836 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
837 | { | |
838 | int32_t *v = pv; | |
839 | int32_t v2; | |
840 | qemu_get_sbe32s(f, &v2); | |
841 | ||
842 | if (*v == v2) | |
843 | return 0; | |
844 | return -EINVAL; | |
845 | } | |
846 | ||
847 | const VMStateInfo vmstate_info_int32_equal = { | |
848 | .name = "int32 equal", | |
849 | .get = get_int32_equal, | |
850 | .put = put_int32, | |
851 | }; | |
852 | ||
0a031e0a JQ |
853 | /* 32 bit int. See that the received value is the less or the same |
854 | than the one in the field */ | |
855 | ||
856 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
857 | { | |
858 | int32_t *old = pv; | |
859 | int32_t new; | |
860 | qemu_get_sbe32s(f, &new); | |
861 | ||
862 | if (*old <= new) | |
863 | return 0; | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
867 | const VMStateInfo vmstate_info_int32_le = { | |
868 | .name = "int32 equal", | |
869 | .get = get_int32_le, | |
870 | .put = put_int32, | |
871 | }; | |
872 | ||
9ed7d6ae JQ |
873 | /* 64 bit int */ |
874 | ||
875 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
876 | { | |
877 | int64_t *v = pv; | |
878 | qemu_get_sbe64s(f, v); | |
879 | return 0; | |
880 | } | |
881 | ||
84e2e3eb | 882 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 883 | { |
84e2e3eb | 884 | int64_t *v = pv; |
9ed7d6ae JQ |
885 | qemu_put_sbe64s(f, v); |
886 | } | |
887 | ||
888 | const VMStateInfo vmstate_info_int64 = { | |
889 | .name = "int64", | |
890 | .get = get_int64, | |
891 | .put = put_int64, | |
892 | }; | |
893 | ||
894 | /* 8 bit unsigned int */ | |
895 | ||
896 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
897 | { | |
898 | uint8_t *v = pv; | |
899 | qemu_get_8s(f, v); | |
900 | return 0; | |
901 | } | |
902 | ||
84e2e3eb | 903 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 904 | { |
84e2e3eb | 905 | uint8_t *v = pv; |
9ed7d6ae JQ |
906 | qemu_put_8s(f, v); |
907 | } | |
908 | ||
909 | const VMStateInfo vmstate_info_uint8 = { | |
910 | .name = "uint8", | |
911 | .get = get_uint8, | |
912 | .put = put_uint8, | |
913 | }; | |
914 | ||
915 | /* 16 bit unsigned int */ | |
916 | ||
917 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
918 | { | |
919 | uint16_t *v = pv; | |
920 | qemu_get_be16s(f, v); | |
921 | return 0; | |
922 | } | |
923 | ||
84e2e3eb | 924 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 925 | { |
84e2e3eb | 926 | uint16_t *v = pv; |
9ed7d6ae JQ |
927 | qemu_put_be16s(f, v); |
928 | } | |
929 | ||
930 | const VMStateInfo vmstate_info_uint16 = { | |
931 | .name = "uint16", | |
932 | .get = get_uint16, | |
933 | .put = put_uint16, | |
934 | }; | |
935 | ||
936 | /* 32 bit unsigned int */ | |
937 | ||
938 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
939 | { | |
940 | uint32_t *v = pv; | |
941 | qemu_get_be32s(f, v); | |
942 | return 0; | |
943 | } | |
944 | ||
84e2e3eb | 945 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 946 | { |
84e2e3eb | 947 | uint32_t *v = pv; |
9ed7d6ae JQ |
948 | qemu_put_be32s(f, v); |
949 | } | |
950 | ||
951 | const VMStateInfo vmstate_info_uint32 = { | |
952 | .name = "uint32", | |
953 | .get = get_uint32, | |
954 | .put = put_uint32, | |
955 | }; | |
956 | ||
9122a8fe JQ |
957 | /* 32 bit uint. See that the received value is the same than the one |
958 | in the field */ | |
959 | ||
960 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
961 | { | |
962 | uint32_t *v = pv; | |
963 | uint32_t v2; | |
964 | qemu_get_be32s(f, &v2); | |
965 | ||
966 | if (*v == v2) { | |
967 | return 0; | |
968 | } | |
969 | return -EINVAL; | |
970 | } | |
971 | ||
972 | const VMStateInfo vmstate_info_uint32_equal = { | |
973 | .name = "uint32 equal", | |
974 | .get = get_uint32_equal, | |
975 | .put = put_uint32, | |
976 | }; | |
977 | ||
9ed7d6ae JQ |
978 | /* 64 bit unsigned int */ |
979 | ||
980 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
981 | { | |
982 | uint64_t *v = pv; | |
983 | qemu_get_be64s(f, v); | |
984 | return 0; | |
985 | } | |
986 | ||
84e2e3eb | 987 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 988 | { |
84e2e3eb | 989 | uint64_t *v = pv; |
9ed7d6ae JQ |
990 | qemu_put_be64s(f, v); |
991 | } | |
992 | ||
993 | const VMStateInfo vmstate_info_uint64 = { | |
994 | .name = "uint64", | |
995 | .get = get_uint64, | |
996 | .put = put_uint64, | |
997 | }; | |
998 | ||
80cd83e7 JQ |
999 | /* 8 bit int. See that the received value is the same than the one |
1000 | in the field */ | |
1001 | ||
1002 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1003 | { | |
1004 | uint8_t *v = pv; | |
1005 | uint8_t v2; | |
1006 | qemu_get_8s(f, &v2); | |
1007 | ||
1008 | if (*v == v2) | |
1009 | return 0; | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
1013 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1014 | .name = "uint8 equal", |
80cd83e7 JQ |
1015 | .get = get_uint8_equal, |
1016 | .put = put_uint8, | |
1017 | }; | |
1018 | ||
dc3b83a0 JQ |
1019 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1020 | in the field */ | |
1021 | ||
1022 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1023 | { | |
1024 | uint16_t *v = pv; | |
1025 | uint16_t v2; | |
1026 | qemu_get_be16s(f, &v2); | |
1027 | ||
1028 | if (*v == v2) | |
1029 | return 0; | |
1030 | return -EINVAL; | |
1031 | } | |
1032 | ||
1033 | const VMStateInfo vmstate_info_uint16_equal = { | |
1034 | .name = "uint16 equal", | |
1035 | .get = get_uint16_equal, | |
1036 | .put = put_uint16, | |
1037 | }; | |
1038 | ||
dde0463b JQ |
1039 | /* timers */ |
1040 | ||
1041 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1042 | { | |
1043 | QEMUTimer *v = pv; | |
1044 | qemu_get_timer(f, v); | |
1045 | return 0; | |
1046 | } | |
1047 | ||
84e2e3eb | 1048 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1049 | { |
84e2e3eb | 1050 | QEMUTimer *v = pv; |
dde0463b JQ |
1051 | qemu_put_timer(f, v); |
1052 | } | |
1053 | ||
1054 | const VMStateInfo vmstate_info_timer = { | |
1055 | .name = "timer", | |
1056 | .get = get_timer, | |
1057 | .put = put_timer, | |
1058 | }; | |
1059 | ||
6f67c50f JQ |
1060 | /* uint8_t buffers */ |
1061 | ||
1062 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1063 | { | |
1064 | uint8_t *v = pv; | |
1065 | qemu_get_buffer(f, v, size); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
84e2e3eb | 1069 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1070 | { |
84e2e3eb | 1071 | uint8_t *v = pv; |
6f67c50f JQ |
1072 | qemu_put_buffer(f, v, size); |
1073 | } | |
1074 | ||
1075 | const VMStateInfo vmstate_info_buffer = { | |
1076 | .name = "buffer", | |
1077 | .get = get_buffer, | |
1078 | .put = put_buffer, | |
1079 | }; | |
1080 | ||
76507c75 | 1081 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1082 | not useful anymore */ |
76507c75 JQ |
1083 | |
1084 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1085 | { | |
21174c34 JK |
1086 | uint8_t buf[1024]; |
1087 | int block_len; | |
1088 | ||
1089 | while (size > 0) { | |
1090 | block_len = MIN(sizeof(buf), size); | |
1091 | size -= block_len; | |
1092 | qemu_get_buffer(f, buf, block_len); | |
1093 | } | |
1094 | return 0; | |
76507c75 JQ |
1095 | } |
1096 | ||
1097 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1098 | { | |
21174c34 JK |
1099 | static const uint8_t buf[1024]; |
1100 | int block_len; | |
1101 | ||
1102 | while (size > 0) { | |
1103 | block_len = MIN(sizeof(buf), size); | |
1104 | size -= block_len; | |
1105 | qemu_put_buffer(f, buf, block_len); | |
1106 | } | |
76507c75 JQ |
1107 | } |
1108 | ||
1109 | const VMStateInfo vmstate_info_unused_buffer = { | |
1110 | .name = "unused_buffer", | |
1111 | .get = get_unused_buffer, | |
1112 | .put = put_unused_buffer, | |
1113 | }; | |
1114 | ||
08e99e29 PM |
1115 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
1116 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
1117 | * bit words with the bits in big endian order. The in-memory format | |
1118 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
1119 | */ | |
1120 | /* This is the number of 64 bit words sent over the wire */ | |
1121 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
1122 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
1123 | { | |
1124 | unsigned long *bmp = pv; | |
1125 | int i, idx = 0; | |
1126 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1127 | uint64_t w = qemu_get_be64(f); | |
1128 | bmp[idx++] = w; | |
1129 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1130 | bmp[idx++] = w >> 32; | |
1131 | } | |
1132 | } | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
1137 | { | |
1138 | unsigned long *bmp = pv; | |
1139 | int i, idx = 0; | |
1140 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1141 | uint64_t w = bmp[idx++]; | |
1142 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1143 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1144 | } | |
1145 | qemu_put_be64(f, w); | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | const VMStateInfo vmstate_info_bitmap = { | |
1150 | .name = "bitmap", | |
1151 | .get = get_bitmap, | |
1152 | .put = put_bitmap, | |
1153 | }; | |
1154 | ||
7685ee6a AW |
1155 | typedef struct CompatEntry { |
1156 | char idstr[256]; | |
1157 | int instance_id; | |
1158 | } CompatEntry; | |
1159 | ||
a672b469 | 1160 | typedef struct SaveStateEntry { |
72cf2d4f | 1161 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1162 | char idstr[256]; |
1163 | int instance_id; | |
4d2ffa08 | 1164 | int alias_id; |
a672b469 AL |
1165 | int version_id; |
1166 | int section_id; | |
22ea40f4 | 1167 | SaveVMHandlers *ops; |
9ed7d6ae | 1168 | const VMStateDescription *vmsd; |
a672b469 | 1169 | void *opaque; |
7685ee6a | 1170 | CompatEntry *compat; |
24312968 | 1171 | int no_migrate; |
a7ae8355 | 1172 | int is_ram; |
a672b469 AL |
1173 | } SaveStateEntry; |
1174 | ||
c163b5ca | 1175 | |
72cf2d4f BS |
1176 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1177 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1178 | static int global_section_id; |
a672b469 | 1179 | |
8718e999 JQ |
1180 | static int calculate_new_instance_id(const char *idstr) |
1181 | { | |
1182 | SaveStateEntry *se; | |
1183 | int instance_id = 0; | |
1184 | ||
72cf2d4f | 1185 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1186 | if (strcmp(idstr, se->idstr) == 0 |
1187 | && instance_id <= se->instance_id) { | |
1188 | instance_id = se->instance_id + 1; | |
1189 | } | |
1190 | } | |
1191 | return instance_id; | |
1192 | } | |
1193 | ||
7685ee6a AW |
1194 | static int calculate_compat_instance_id(const char *idstr) |
1195 | { | |
1196 | SaveStateEntry *se; | |
1197 | int instance_id = 0; | |
1198 | ||
1199 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1200 | if (!se->compat) | |
1201 | continue; | |
1202 | ||
1203 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1204 | && instance_id <= se->compat->instance_id) { | |
1205 | instance_id = se->compat->instance_id + 1; | |
1206 | } | |
1207 | } | |
1208 | return instance_id; | |
1209 | } | |
1210 | ||
a672b469 AL |
1211 | /* TODO: Individual devices generally have very little idea about the rest |
1212 | of the system, so instance_id should be removed/replaced. | |
1213 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1214 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1215 | int register_savevm_live(DeviceState *dev, |
1216 | const char *idstr, | |
a672b469 AL |
1217 | int instance_id, |
1218 | int version_id, | |
7908c78d | 1219 | SaveVMHandlers *ops, |
a672b469 AL |
1220 | void *opaque) |
1221 | { | |
8718e999 | 1222 | SaveStateEntry *se; |
a672b469 | 1223 | |
7267c094 | 1224 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1225 | se->version_id = version_id; |
1226 | se->section_id = global_section_id++; | |
7908c78d | 1227 | se->ops = ops; |
a672b469 | 1228 | se->opaque = opaque; |
9ed7d6ae | 1229 | se->vmsd = NULL; |
24312968 | 1230 | se->no_migrate = 0; |
a7ae8355 | 1231 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1232 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1233 | se->is_ram = 1; |
1234 | } | |
a672b469 | 1235 | |
09e5ab63 AL |
1236 | if (dev) { |
1237 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1238 | if (id) { |
1239 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1240 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1241 | g_free(id); |
7685ee6a | 1242 | |
7267c094 | 1243 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1244 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1245 | se->compat->instance_id = instance_id == -1 ? | |
1246 | calculate_compat_instance_id(idstr) : instance_id; | |
1247 | instance_id = -1; | |
1248 | } | |
1249 | } | |
1250 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1251 | ||
8718e999 | 1252 | if (instance_id == -1) { |
7685ee6a | 1253 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1254 | } else { |
1255 | se->instance_id = instance_id; | |
a672b469 | 1256 | } |
7685ee6a | 1257 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1258 | /* add at the end of list */ |
72cf2d4f | 1259 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1260 | return 0; |
1261 | } | |
1262 | ||
0be71e32 AW |
1263 | int register_savevm(DeviceState *dev, |
1264 | const char *idstr, | |
a672b469 AL |
1265 | int instance_id, |
1266 | int version_id, | |
1267 | SaveStateHandler *save_state, | |
1268 | LoadStateHandler *load_state, | |
1269 | void *opaque) | |
1270 | { | |
7908c78d JQ |
1271 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1272 | ops->save_state = save_state; | |
1273 | ops->load_state = load_state; | |
0be71e32 | 1274 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1275 | ops, opaque); |
a672b469 AL |
1276 | } |
1277 | ||
0be71e32 | 1278 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1279 | { |
8718e999 | 1280 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1281 | char id[256] = ""; |
1282 | ||
09e5ab63 AL |
1283 | if (dev) { |
1284 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1285 | if (path) { |
1286 | pstrcpy(id, sizeof(id), path); | |
1287 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1288 | g_free(path); |
7685ee6a AW |
1289 | } |
1290 | } | |
1291 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1292 | |
72cf2d4f | 1293 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1294 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1295 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1296 | if (se->compat) { |
7267c094 | 1297 | g_free(se->compat); |
69e58af9 | 1298 | } |
22ea40f4 | 1299 | g_free(se->ops); |
7267c094 | 1300 | g_free(se); |
41bd13af | 1301 | } |
41bd13af AL |
1302 | } |
1303 | } | |
1304 | ||
0be71e32 | 1305 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1306 | const VMStateDescription *vmsd, |
1307 | void *opaque, int alias_id, | |
1308 | int required_for_version) | |
9ed7d6ae | 1309 | { |
8718e999 | 1310 | SaveStateEntry *se; |
9ed7d6ae | 1311 | |
4d2ffa08 JK |
1312 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1313 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1314 | ||
7267c094 | 1315 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1316 | se->version_id = vmsd->version_id; |
1317 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1318 | se->opaque = opaque; |
1319 | se->vmsd = vmsd; | |
4d2ffa08 | 1320 | se->alias_id = alias_id; |
2837c8ea | 1321 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1322 | |
09e5ab63 AL |
1323 | if (dev) { |
1324 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1325 | if (id) { |
1326 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1327 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1328 | g_free(id); |
7685ee6a | 1329 | |
7267c094 | 1330 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1331 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1332 | se->compat->instance_id = instance_id == -1 ? | |
1333 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1334 | instance_id = -1; | |
1335 | } | |
1336 | } | |
1337 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1338 | ||
8718e999 | 1339 | if (instance_id == -1) { |
7685ee6a | 1340 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1341 | } else { |
1342 | se->instance_id = instance_id; | |
9ed7d6ae | 1343 | } |
7685ee6a | 1344 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1345 | /* add at the end of list */ |
72cf2d4f | 1346 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1347 | return 0; |
1348 | } | |
1349 | ||
0be71e32 AW |
1350 | int vmstate_register(DeviceState *dev, int instance_id, |
1351 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1352 | { |
0be71e32 AW |
1353 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1354 | opaque, -1, 0); | |
4d2ffa08 JK |
1355 | } |
1356 | ||
0be71e32 AW |
1357 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1358 | void *opaque) | |
9ed7d6ae | 1359 | { |
1eb7538b JQ |
1360 | SaveStateEntry *se, *new_se; |
1361 | ||
72cf2d4f | 1362 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1363 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1364 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1365 | if (se->compat) { |
7267c094 | 1366 | g_free(se->compat); |
69e58af9 | 1367 | } |
7267c094 | 1368 | g_free(se); |
1eb7538b JQ |
1369 | } |
1370 | } | |
9ed7d6ae JQ |
1371 | } |
1372 | ||
811814bd JQ |
1373 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1374 | void *opaque); | |
1375 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1376 | void *opaque); | |
1377 | ||
9ed7d6ae JQ |
1378 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1379 | void *opaque, int version_id) | |
1380 | { | |
1381 | VMStateField *field = vmsd->fields; | |
811814bd | 1382 | int ret; |
9ed7d6ae JQ |
1383 | |
1384 | if (version_id > vmsd->version_id) { | |
1385 | return -EINVAL; | |
1386 | } | |
1387 | if (version_id < vmsd->minimum_version_id_old) { | |
1388 | return -EINVAL; | |
1389 | } | |
1390 | if (version_id < vmsd->minimum_version_id) { | |
1391 | return vmsd->load_state_old(f, opaque, version_id); | |
1392 | } | |
fd4d52de JQ |
1393 | if (vmsd->pre_load) { |
1394 | int ret = vmsd->pre_load(opaque); | |
1395 | if (ret) | |
1396 | return ret; | |
1397 | } | |
9ed7d6ae | 1398 | while(field->name) { |
f11f6a5f JQ |
1399 | if ((field->field_exists && |
1400 | field->field_exists(opaque, version_id)) || | |
1401 | (!field->field_exists && | |
1402 | field->version_id <= version_id)) { | |
f752a6aa | 1403 | void *base_addr = opaque + field->offset; |
811814bd | 1404 | int i, n_elems = 1; |
e61a1e0a | 1405 | int size = field->size; |
9ed7d6ae | 1406 | |
e61a1e0a JQ |
1407 | if (field->flags & VMS_VBUFFER) { |
1408 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1409 | if (field->flags & VMS_MULTIPLY) { |
1410 | size *= field->size; | |
1411 | } | |
e61a1e0a | 1412 | } |
f752a6aa JQ |
1413 | if (field->flags & VMS_ARRAY) { |
1414 | n_elems = field->num; | |
d6698281 JQ |
1415 | } else if (field->flags & VMS_VARRAY_INT32) { |
1416 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1417 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1418 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1419 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1420 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1421 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1422 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1423 | } |
dde0463b | 1424 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1425 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1426 | } |
f752a6aa | 1427 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1428 | void *addr = base_addr + size * i; |
ec245e21 | 1429 | |
19df438b JQ |
1430 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1431 | addr = *(void **)addr; | |
1432 | } | |
ec245e21 | 1433 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1434 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1435 | } else { |
e61a1e0a | 1436 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1437 | |
1438 | } | |
f752a6aa JQ |
1439 | if (ret < 0) { |
1440 | return ret; | |
1441 | } | |
9ed7d6ae JQ |
1442 | } |
1443 | } | |
1444 | field++; | |
1445 | } | |
811814bd JQ |
1446 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1447 | if (ret != 0) { | |
1448 | return ret; | |
1449 | } | |
752ff2fa | 1450 | if (vmsd->post_load) { |
e59fb374 | 1451 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1452 | } |
9ed7d6ae JQ |
1453 | return 0; |
1454 | } | |
1455 | ||
1456 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1457 | void *opaque) |
9ed7d6ae JQ |
1458 | { |
1459 | VMStateField *field = vmsd->fields; | |
1460 | ||
8fb0791d JQ |
1461 | if (vmsd->pre_save) { |
1462 | vmsd->pre_save(opaque); | |
1463 | } | |
9ed7d6ae | 1464 | while(field->name) { |
f11f6a5f JQ |
1465 | if (!field->field_exists || |
1466 | field->field_exists(opaque, vmsd->version_id)) { | |
1467 | void *base_addr = opaque + field->offset; | |
1468 | int i, n_elems = 1; | |
e61a1e0a | 1469 | int size = field->size; |
dde0463b | 1470 | |
e61a1e0a JQ |
1471 | if (field->flags & VMS_VBUFFER) { |
1472 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1473 | if (field->flags & VMS_MULTIPLY) { |
1474 | size *= field->size; | |
1475 | } | |
e61a1e0a | 1476 | } |
f11f6a5f JQ |
1477 | if (field->flags & VMS_ARRAY) { |
1478 | n_elems = field->num; | |
d6698281 JQ |
1479 | } else if (field->flags & VMS_VARRAY_INT32) { |
1480 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1481 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1482 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1483 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1484 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1485 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1486 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1487 | } |
1488 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1489 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1490 | } |
1491 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1492 | void *addr = base_addr + size * i; |
ec245e21 | 1493 | |
8595387e JQ |
1494 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1495 | addr = *(void **)addr; | |
1496 | } | |
f11f6a5f JQ |
1497 | if (field->flags & VMS_STRUCT) { |
1498 | vmstate_save_state(f, field->vmsd, addr); | |
1499 | } else { | |
e61a1e0a | 1500 | field->info->put(f, addr, size); |
f11f6a5f | 1501 | } |
ec245e21 | 1502 | } |
dde0463b | 1503 | } |
9ed7d6ae JQ |
1504 | field++; |
1505 | } | |
811814bd | 1506 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1507 | } |
1508 | ||
4082be4d JQ |
1509 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1510 | { | |
9ed7d6ae | 1511 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1512 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1513 | } |
1514 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1515 | } |
1516 | ||
dc912121 | 1517 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1518 | { |
9ed7d6ae | 1519 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1520 | se->ops->save_state(f, se->opaque); |
dc912121 | 1521 | return; |
9ed7d6ae JQ |
1522 | } |
1523 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1524 | } |
1525 | ||
a672b469 AL |
1526 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1527 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1528 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1529 | ||
1530 | #define QEMU_VM_EOF 0x00 | |
1531 | #define QEMU_VM_SECTION_START 0x01 | |
1532 | #define QEMU_VM_SECTION_PART 0x02 | |
1533 | #define QEMU_VM_SECTION_END 0x03 | |
1534 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1535 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1536 | |
e1c37d0e | 1537 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1538 | { |
1539 | SaveStateEntry *se; | |
1540 | ||
1541 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1542 | if (se->no_migrate) { | |
e1c37d0e | 1543 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1544 | return true; |
1545 | } | |
1546 | } | |
1547 | return false; | |
1548 | } | |
1549 | ||
6607ae23 IY |
1550 | int qemu_savevm_state_begin(QEMUFile *f, |
1551 | const MigrationParams *params) | |
a672b469 AL |
1552 | { |
1553 | SaveStateEntry *se; | |
39346385 | 1554 | int ret; |
a672b469 | 1555 | |
c163b5ca | 1556 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1557 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1558 | continue; |
6607ae23 | 1559 | } |
22ea40f4 | 1560 | se->ops->set_params(params, se->opaque); |
c163b5ca | 1561 | } |
1562 | ||
a672b469 AL |
1563 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1564 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1565 | ||
72cf2d4f | 1566 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1567 | int len; |
1568 | ||
d1315aac | 1569 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1570 | continue; |
22ea40f4 | 1571 | } |
6bd68781 JQ |
1572 | if (se->ops && se->ops->is_active) { |
1573 | if (!se->ops->is_active(se->opaque)) { | |
1574 | continue; | |
1575 | } | |
1576 | } | |
a672b469 AL |
1577 | /* Section type */ |
1578 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1579 | qemu_put_be32(f, se->section_id); | |
1580 | ||
1581 | /* ID string */ | |
1582 | len = strlen(se->idstr); | |
1583 | qemu_put_byte(f, len); | |
1584 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1585 | ||
1586 | qemu_put_be32(f, se->instance_id); | |
1587 | qemu_put_be32(f, se->version_id); | |
1588 | ||
d1315aac | 1589 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1590 | if (ret < 0) { |
539de124 | 1591 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1592 | return ret; |
1593 | } | |
a672b469 | 1594 | } |
624b9cc2 | 1595 | ret = qemu_file_get_error(f); |
39346385 | 1596 | if (ret != 0) { |
539de124 | 1597 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1598 | } |
a672b469 | 1599 | |
39346385 JQ |
1600 | return ret; |
1601 | ||
a672b469 AL |
1602 | } |
1603 | ||
39346385 | 1604 | /* |
07f35073 | 1605 | * this function has three return values: |
39346385 JQ |
1606 | * negative: there was one error, and we have -errno. |
1607 | * 0 : We haven't finished, caller have to go again | |
1608 | * 1 : We have finished, we can go to complete phase | |
1609 | */ | |
539de124 | 1610 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1611 | { |
1612 | SaveStateEntry *se; | |
1613 | int ret = 1; | |
1614 | ||
72cf2d4f | 1615 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1616 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1617 | continue; |
22ea40f4 | 1618 | } |
6bd68781 JQ |
1619 | if (se->ops && se->ops->is_active) { |
1620 | if (!se->ops->is_active(se->opaque)) { | |
1621 | continue; | |
1622 | } | |
1623 | } | |
aac844ed JQ |
1624 | if (qemu_file_rate_limit(f)) { |
1625 | return 0; | |
1626 | } | |
517a13c9 | 1627 | trace_savevm_section_start(); |
a672b469 AL |
1628 | /* Section type */ |
1629 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1630 | qemu_put_be32(f, se->section_id); | |
1631 | ||
16310a3c | 1632 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1633 | trace_savevm_section_end(se->section_id); |
1634 | ||
2975725f | 1635 | if (ret <= 0) { |
90697be8 JK |
1636 | /* Do not proceed to the next vmstate before this one reported |
1637 | completion of the current stage. This serializes the migration | |
1638 | and reduces the probability that a faster changing state is | |
1639 | synchronized over and over again. */ | |
1640 | break; | |
1641 | } | |
a672b469 | 1642 | } |
39346385 JQ |
1643 | if (ret != 0) { |
1644 | return ret; | |
1645 | } | |
624b9cc2 | 1646 | ret = qemu_file_get_error(f); |
39346385 | 1647 | if (ret != 0) { |
539de124 | 1648 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1649 | } |
39346385 | 1650 | return ret; |
a672b469 AL |
1651 | } |
1652 | ||
539de124 | 1653 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1654 | { |
1655 | SaveStateEntry *se; | |
2975725f | 1656 | int ret; |
a672b469 | 1657 | |
ea375f9a JK |
1658 | cpu_synchronize_all_states(); |
1659 | ||
72cf2d4f | 1660 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1661 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1662 | continue; |
22ea40f4 | 1663 | } |
6bd68781 JQ |
1664 | if (se->ops && se->ops->is_active) { |
1665 | if (!se->ops->is_active(se->opaque)) { | |
1666 | continue; | |
1667 | } | |
1668 | } | |
517a13c9 | 1669 | trace_savevm_section_start(); |
a672b469 AL |
1670 | /* Section type */ |
1671 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1672 | qemu_put_be32(f, se->section_id); | |
1673 | ||
16310a3c | 1674 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1675 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1676 | if (ret < 0) { |
1677 | return ret; | |
1678 | } | |
a672b469 AL |
1679 | } |
1680 | ||
72cf2d4f | 1681 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1682 | int len; |
1683 | ||
22ea40f4 | 1684 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1685 | continue; |
22ea40f4 | 1686 | } |
517a13c9 | 1687 | trace_savevm_section_start(); |
a672b469 AL |
1688 | /* Section type */ |
1689 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1690 | qemu_put_be32(f, se->section_id); | |
1691 | ||
1692 | /* ID string */ | |
1693 | len = strlen(se->idstr); | |
1694 | qemu_put_byte(f, len); | |
1695 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1696 | ||
1697 | qemu_put_be32(f, se->instance_id); | |
1698 | qemu_put_be32(f, se->version_id); | |
1699 | ||
dc912121 | 1700 | vmstate_save(f, se); |
517a13c9 | 1701 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1702 | } |
1703 | ||
1704 | qemu_put_byte(f, QEMU_VM_EOF); | |
1705 | ||
624b9cc2 | 1706 | return qemu_file_get_error(f); |
a672b469 AL |
1707 | } |
1708 | ||
e4ed1541 JQ |
1709 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1710 | { | |
1711 | SaveStateEntry *se; | |
1712 | uint64_t ret = 0; | |
1713 | ||
1714 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1715 | if (!se->ops || !se->ops->save_live_pending) { | |
1716 | continue; | |
1717 | } | |
1718 | if (se->ops && se->ops->is_active) { | |
1719 | if (!se->ops->is_active(se->opaque)) { | |
1720 | continue; | |
1721 | } | |
1722 | } | |
1723 | ret += se->ops->save_live_pending(f, se->opaque, max_size); | |
1724 | } | |
1725 | return ret; | |
1726 | } | |
1727 | ||
539de124 | 1728 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1729 | { |
1730 | SaveStateEntry *se; | |
1731 | ||
1732 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1733 | if (se->ops && se->ops->cancel) { |
1734 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1735 | } |
1736 | } | |
1737 | } | |
1738 | ||
e1c37d0e | 1739 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1740 | { |
a672b469 | 1741 | int ret; |
6607ae23 IY |
1742 | MigrationParams params = { |
1743 | .blk = 0, | |
1744 | .shared = 0 | |
1745 | }; | |
a672b469 | 1746 | |
e1c37d0e | 1747 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1748 | ret = -EINVAL; |
1749 | goto out; | |
1750 | } | |
1751 | ||
6607ae23 | 1752 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1753 | if (ret < 0) |
1754 | goto out; | |
1755 | ||
1756 | do { | |
539de124 | 1757 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1758 | if (ret < 0) |
1759 | goto out; | |
1760 | } while (ret == 0); | |
1761 | ||
539de124 | 1762 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1763 | |
1764 | out: | |
39346385 | 1765 | if (ret == 0) { |
624b9cc2 | 1766 | ret = qemu_file_get_error(f); |
39346385 | 1767 | } |
a672b469 | 1768 | |
a672b469 AL |
1769 | return ret; |
1770 | } | |
1771 | ||
a7ae8355 SS |
1772 | static int qemu_save_device_state(QEMUFile *f) |
1773 | { | |
1774 | SaveStateEntry *se; | |
1775 | ||
1776 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1777 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1778 | ||
1779 | cpu_synchronize_all_states(); | |
1780 | ||
1781 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1782 | int len; | |
1783 | ||
1784 | if (se->is_ram) { | |
1785 | continue; | |
1786 | } | |
22ea40f4 | 1787 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1788 | continue; |
1789 | } | |
1790 | ||
1791 | /* Section type */ | |
1792 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1793 | qemu_put_be32(f, se->section_id); | |
1794 | ||
1795 | /* ID string */ | |
1796 | len = strlen(se->idstr); | |
1797 | qemu_put_byte(f, len); | |
1798 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1799 | ||
1800 | qemu_put_be32(f, se->instance_id); | |
1801 | qemu_put_be32(f, se->version_id); | |
1802 | ||
1803 | vmstate_save(f, se); | |
1804 | } | |
1805 | ||
1806 | qemu_put_byte(f, QEMU_VM_EOF); | |
1807 | ||
1808 | return qemu_file_get_error(f); | |
1809 | } | |
1810 | ||
a672b469 AL |
1811 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1812 | { | |
1813 | SaveStateEntry *se; | |
1814 | ||
72cf2d4f | 1815 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1816 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1817 | (instance_id == se->instance_id || |
1818 | instance_id == se->alias_id)) | |
a672b469 | 1819 | return se; |
7685ee6a AW |
1820 | /* Migrating from an older version? */ |
1821 | if (strstr(se->idstr, idstr) && se->compat) { | |
1822 | if (!strcmp(se->compat->idstr, idstr) && | |
1823 | (instance_id == se->compat->instance_id || | |
1824 | instance_id == se->alias_id)) | |
1825 | return se; | |
1826 | } | |
a672b469 AL |
1827 | } |
1828 | return NULL; | |
1829 | } | |
1830 | ||
811814bd JQ |
1831 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1832 | { | |
1833 | while(sub && sub->needed) { | |
1834 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1835 | return sub->vmsd; | |
1836 | } | |
1837 | sub++; | |
1838 | } | |
1839 | return NULL; | |
1840 | } | |
1841 | ||
1842 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1843 | void *opaque) | |
1844 | { | |
c6380724 | 1845 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1846 | char idstr[256]; |
1847 | int ret; | |
c6380724 | 1848 | uint8_t version_id, len, size; |
811814bd JQ |
1849 | const VMStateDescription *sub_vmsd; |
1850 | ||
c6380724 JQ |
1851 | len = qemu_peek_byte(f, 1); |
1852 | if (len < strlen(vmsd->name) + 1) { | |
1853 | /* subsection name has be be "section_name/a" */ | |
1854 | return 0; | |
1855 | } | |
1856 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1857 | if (size != len) { | |
1858 | return 0; | |
1859 | } | |
1860 | idstr[size] = 0; | |
811814bd | 1861 | |
c6380724 JQ |
1862 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1863 | /* it don't have a valid subsection name */ | |
1864 | return 0; | |
1865 | } | |
3da9eebd | 1866 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1867 | if (sub_vmsd == NULL) { |
1868 | return -ENOENT; | |
1869 | } | |
c6380724 JQ |
1870 | qemu_file_skip(f, 1); /* subsection */ |
1871 | qemu_file_skip(f, 1); /* len */ | |
1872 | qemu_file_skip(f, len); /* idstr */ | |
1873 | version_id = qemu_get_be32(f); | |
1874 | ||
811814bd JQ |
1875 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1876 | if (ret) { | |
1877 | return ret; | |
1878 | } | |
1879 | } | |
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1884 | void *opaque) | |
1885 | { | |
1886 | const VMStateSubsection *sub = vmsd->subsections; | |
1887 | ||
1888 | while (sub && sub->needed) { | |
1889 | if (sub->needed(opaque)) { | |
1890 | const VMStateDescription *vmsd = sub->vmsd; | |
1891 | uint8_t len; | |
1892 | ||
1893 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1894 | len = strlen(vmsd->name); | |
1895 | qemu_put_byte(f, len); | |
1896 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1897 | qemu_put_be32(f, vmsd->version_id); | |
1898 | vmstate_save_state(f, vmsd, opaque); | |
1899 | } | |
1900 | sub++; | |
1901 | } | |
1902 | } | |
1903 | ||
a672b469 | 1904 | typedef struct LoadStateEntry { |
72cf2d4f | 1905 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1906 | SaveStateEntry *se; |
1907 | int section_id; | |
1908 | int version_id; | |
a672b469 AL |
1909 | } LoadStateEntry; |
1910 | ||
a672b469 AL |
1911 | int qemu_loadvm_state(QEMUFile *f) |
1912 | { | |
72cf2d4f BS |
1913 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1914 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1915 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1916 | uint8_t section_type; |
1917 | unsigned int v; | |
1918 | int ret; | |
1919 | ||
e1c37d0e | 1920 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1921 | return -EINVAL; |
1922 | } | |
1923 | ||
a672b469 AL |
1924 | v = qemu_get_be32(f); |
1925 | if (v != QEMU_VM_FILE_MAGIC) | |
1926 | return -EINVAL; | |
1927 | ||
1928 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1929 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1930 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1931 | return -ENOTSUP; | |
1932 | } | |
a672b469 AL |
1933 | if (v != QEMU_VM_FILE_VERSION) |
1934 | return -ENOTSUP; | |
1935 | ||
1936 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1937 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1938 | SaveStateEntry *se; |
1939 | char idstr[257]; | |
1940 | int len; | |
1941 | ||
1942 | switch (section_type) { | |
1943 | case QEMU_VM_SECTION_START: | |
1944 | case QEMU_VM_SECTION_FULL: | |
1945 | /* Read section start */ | |
1946 | section_id = qemu_get_be32(f); | |
1947 | len = qemu_get_byte(f); | |
1948 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1949 | idstr[len] = 0; | |
1950 | instance_id = qemu_get_be32(f); | |
1951 | version_id = qemu_get_be32(f); | |
1952 | ||
1953 | /* Find savevm section */ | |
1954 | se = find_se(idstr, instance_id); | |
1955 | if (se == NULL) { | |
1956 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1957 | ret = -EINVAL; | |
1958 | goto out; | |
1959 | } | |
1960 | ||
1961 | /* Validate version */ | |
1962 | if (version_id > se->version_id) { | |
1963 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1964 | version_id, idstr, se->version_id); | |
1965 | ret = -EINVAL; | |
1966 | goto out; | |
1967 | } | |
1968 | ||
1969 | /* Add entry */ | |
7267c094 | 1970 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1971 | |
1972 | le->se = se; | |
1973 | le->section_id = section_id; | |
1974 | le->version_id = version_id; | |
72cf2d4f | 1975 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1976 | |
4082be4d | 1977 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1978 | if (ret < 0) { |
1979 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1980 | instance_id, idstr); | |
1981 | goto out; | |
1982 | } | |
a672b469 AL |
1983 | break; |
1984 | case QEMU_VM_SECTION_PART: | |
1985 | case QEMU_VM_SECTION_END: | |
1986 | section_id = qemu_get_be32(f); | |
1987 | ||
72cf2d4f | 1988 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1989 | if (le->section_id == section_id) { |
1990 | break; | |
1991 | } | |
1992 | } | |
a672b469 AL |
1993 | if (le == NULL) { |
1994 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1995 | ret = -EINVAL; | |
1996 | goto out; | |
1997 | } | |
1998 | ||
4082be4d | 1999 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
2000 | if (ret < 0) { |
2001 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
2002 | section_id); | |
2003 | goto out; | |
2004 | } | |
a672b469 AL |
2005 | break; |
2006 | default: | |
2007 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
2008 | ret = -EINVAL; | |
2009 | goto out; | |
2010 | } | |
2011 | } | |
2012 | ||
ea375f9a JK |
2013 | cpu_synchronize_all_post_init(); |
2014 | ||
a672b469 AL |
2015 | ret = 0; |
2016 | ||
2017 | out: | |
72cf2d4f BS |
2018 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2019 | QLIST_REMOVE(le, entry); | |
7267c094 | 2020 | g_free(le); |
a672b469 AL |
2021 | } |
2022 | ||
42802d47 JQ |
2023 | if (ret == 0) { |
2024 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2025 | } |
a672b469 AL |
2026 | |
2027 | return ret; | |
2028 | } | |
2029 | ||
a672b469 AL |
2030 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2031 | const char *name) | |
2032 | { | |
2033 | QEMUSnapshotInfo *sn_tab, *sn; | |
2034 | int nb_sns, i, ret; | |
2035 | ||
2036 | ret = -ENOENT; | |
2037 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2038 | if (nb_sns < 0) | |
2039 | return ret; | |
2040 | for(i = 0; i < nb_sns; i++) { | |
2041 | sn = &sn_tab[i]; | |
2042 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2043 | *sn_info = *sn; | |
2044 | ret = 0; | |
2045 | break; | |
2046 | } | |
2047 | } | |
7267c094 | 2048 | g_free(sn_tab); |
a672b469 AL |
2049 | return ret; |
2050 | } | |
2051 | ||
cb499fb2 KW |
2052 | /* |
2053 | * Deletes snapshots of a given name in all opened images. | |
2054 | */ | |
2055 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2056 | { | |
2057 | BlockDriverState *bs; | |
cb499fb2 KW |
2058 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2059 | int ret; | |
2060 | ||
dbc13590 MA |
2061 | bs = NULL; |
2062 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2063 | if (bdrv_can_snapshot(bs) && |
2064 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2065 | { | |
2066 | ret = bdrv_snapshot_delete(bs, name); | |
2067 | if (ret < 0) { | |
2068 | monitor_printf(mon, | |
2069 | "Error while deleting snapshot on '%s'\n", | |
2070 | bdrv_get_device_name(bs)); | |
2071 | return -1; | |
2072 | } | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | return 0; | |
2077 | } | |
2078 | ||
d54908a5 | 2079 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2080 | { |
2081 | BlockDriverState *bs, *bs1; | |
2082 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2083 | int ret; |
a672b469 AL |
2084 | QEMUFile *f; |
2085 | int saved_vm_running; | |
c2c9a466 | 2086 | uint64_t vm_state_size; |
68b891ec | 2087 | qemu_timeval tv; |
7d631a11 | 2088 | struct tm tm; |
d54908a5 | 2089 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2090 | |
feeee5ac | 2091 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2092 | bs = NULL; |
2093 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2094 | |
07b70bfb | 2095 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2096 | continue; |
2097 | } | |
2098 | ||
2099 | if (!bdrv_can_snapshot(bs)) { | |
2100 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2101 | bdrv_get_device_name(bs)); | |
2102 | return; | |
2103 | } | |
2104 | } | |
2105 | ||
f9092b10 | 2106 | bs = bdrv_snapshots(); |
a672b469 | 2107 | if (!bs) { |
376253ec | 2108 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2109 | return; |
2110 | } | |
a672b469 | 2111 | |
1354869c | 2112 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2113 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2114 | |
cb499fb2 | 2115 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2116 | |
2117 | /* fill auxiliary fields */ | |
68b891ec | 2118 | qemu_gettimeofday(&tv); |
a672b469 AL |
2119 | sn->date_sec = tv.tv_sec; |
2120 | sn->date_nsec = tv.tv_usec * 1000; | |
74475455 | 2121 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2122 | |
7d631a11 MDCF |
2123 | if (name) { |
2124 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2125 | if (ret >= 0) { | |
2126 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2127 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2128 | } else { | |
2129 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2130 | } | |
2131 | } else { | |
d7d9b528 BS |
2132 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2133 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 | 2134 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
7d631a11 MDCF |
2135 | } |
2136 | ||
cb499fb2 | 2137 | /* Delete old snapshots of the same name */ |
f139a412 | 2138 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2139 | goto the_end; |
2140 | } | |
2141 | ||
a672b469 | 2142 | /* save the VM state */ |
45566e9c | 2143 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2144 | if (!f) { |
376253ec | 2145 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2146 | goto the_end; |
2147 | } | |
e1c37d0e | 2148 | ret = qemu_savevm_state(f); |
2d22b18f | 2149 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2150 | qemu_fclose(f); |
2151 | if (ret < 0) { | |
376253ec | 2152 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2153 | goto the_end; |
2154 | } | |
2155 | ||
2156 | /* create the snapshots */ | |
2157 | ||
dbc13590 MA |
2158 | bs1 = NULL; |
2159 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2160 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2161 | /* Write VM state size only to the image that contains the state */ |
2162 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2163 | ret = bdrv_snapshot_create(bs1, sn); |
2164 | if (ret < 0) { | |
376253ec AL |
2165 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2166 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2167 | } |
2168 | } | |
2169 | } | |
2170 | ||
2171 | the_end: | |
2172 | if (saved_vm_running) | |
2173 | vm_start(); | |
2174 | } | |
2175 | ||
a7ae8355 SS |
2176 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2177 | { | |
2178 | QEMUFile *f; | |
2179 | int saved_vm_running; | |
2180 | int ret; | |
2181 | ||
2182 | saved_vm_running = runstate_is_running(); | |
2183 | vm_stop(RUN_STATE_SAVE_VM); | |
2184 | ||
2185 | f = qemu_fopen(filename, "wb"); | |
2186 | if (!f) { | |
2187 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2188 | goto the_end; | |
2189 | } | |
2190 | ret = qemu_save_device_state(f); | |
2191 | qemu_fclose(f); | |
2192 | if (ret < 0) { | |
2193 | error_set(errp, QERR_IO_ERROR); | |
2194 | } | |
2195 | ||
2196 | the_end: | |
2197 | if (saved_vm_running) | |
2198 | vm_start(); | |
a7ae8355 SS |
2199 | } |
2200 | ||
03cd4655 | 2201 | int load_vmstate(const char *name) |
a672b469 | 2202 | { |
f0aa7a8b | 2203 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2204 | QEMUSnapshotInfo sn; |
a672b469 | 2205 | QEMUFile *f; |
751c6a17 | 2206 | int ret; |
a672b469 | 2207 | |
f0aa7a8b MDCF |
2208 | bs_vm_state = bdrv_snapshots(); |
2209 | if (!bs_vm_state) { | |
2210 | error_report("No block device supports snapshots"); | |
2211 | return -ENOTSUP; | |
2212 | } | |
2213 | ||
2214 | /* Don't even try to load empty VM states */ | |
2215 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2216 | if (ret < 0) { | |
2217 | return ret; | |
2218 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2219 | error_report("This is a disk-only snapshot. Revert to it offline " |
2220 | "using qemu-img."); | |
f0aa7a8b MDCF |
2221 | return -EINVAL; |
2222 | } | |
2223 | ||
2224 | /* Verify if there is any device that doesn't support snapshots and is | |
2225 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2226 | bs = NULL; |
2227 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2228 | |
07b70bfb | 2229 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2230 | continue; |
2231 | } | |
2232 | ||
2233 | if (!bdrv_can_snapshot(bs)) { | |
2234 | error_report("Device '%s' is writable but does not support snapshots.", | |
2235 | bdrv_get_device_name(bs)); | |
2236 | return -ENOTSUP; | |
2237 | } | |
feeee5ac | 2238 | |
f0aa7a8b MDCF |
2239 | ret = bdrv_snapshot_find(bs, &sn, name); |
2240 | if (ret < 0) { | |
2241 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2242 | bdrv_get_device_name(bs), name); | |
2243 | return ret; | |
2244 | } | |
a672b469 AL |
2245 | } |
2246 | ||
2247 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2248 | bdrv_drain_all(); |
a672b469 | 2249 | |
f0aa7a8b MDCF |
2250 | bs = NULL; |
2251 | while ((bs = bdrv_next(bs))) { | |
2252 | if (bdrv_can_snapshot(bs)) { | |
2253 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2254 | if (ret < 0) { |
f0aa7a8b MDCF |
2255 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2256 | ret, name, bdrv_get_device_name(bs)); | |
2257 | return ret; | |
a672b469 AL |
2258 | } |
2259 | } | |
2260 | } | |
2261 | ||
a672b469 | 2262 | /* restore the VM state */ |
f0aa7a8b | 2263 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2264 | if (!f) { |
1ecda02b | 2265 | error_report("Could not open VM state file"); |
05f2401e | 2266 | return -EINVAL; |
a672b469 | 2267 | } |
f0aa7a8b | 2268 | |
5a8a49d7 | 2269 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2270 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2271 | |
a672b469 AL |
2272 | qemu_fclose(f); |
2273 | if (ret < 0) { | |
1ecda02b | 2274 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2275 | return ret; |
a672b469 | 2276 | } |
f0aa7a8b | 2277 | |
05f2401e | 2278 | return 0; |
7b630349 JQ |
2279 | } |
2280 | ||
d54908a5 | 2281 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2282 | { |
2283 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2284 | int ret; |
d54908a5 | 2285 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2286 | |
f9092b10 | 2287 | bs = bdrv_snapshots(); |
a672b469 | 2288 | if (!bs) { |
376253ec | 2289 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2290 | return; |
2291 | } | |
2292 | ||
dbc13590 MA |
2293 | bs1 = NULL; |
2294 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2295 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2296 | ret = bdrv_snapshot_delete(bs1, name); |
2297 | if (ret < 0) { | |
2298 | if (ret == -ENOTSUP) | |
376253ec AL |
2299 | monitor_printf(mon, |
2300 | "Snapshots not supported on device '%s'\n", | |
2301 | bdrv_get_device_name(bs1)); | |
a672b469 | 2302 | else |
376253ec AL |
2303 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2304 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2305 | } |
2306 | } | |
2307 | } | |
2308 | } | |
2309 | ||
376253ec | 2310 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2311 | { |
2312 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2313 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2314 | int nb_sns, i, ret, available; | |
2315 | int total; | |
2316 | int *available_snapshots; | |
a672b469 AL |
2317 | char buf[256]; |
2318 | ||
f9092b10 | 2319 | bs = bdrv_snapshots(); |
a672b469 | 2320 | if (!bs) { |
376253ec | 2321 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2322 | return; |
2323 | } | |
a672b469 AL |
2324 | |
2325 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2326 | if (nb_sns < 0) { | |
376253ec | 2327 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2328 | return; |
2329 | } | |
f9209915 MDCF |
2330 | |
2331 | if (nb_sns == 0) { | |
2332 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2333 | return; | |
2334 | } | |
2335 | ||
7267c094 | 2336 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2337 | total = 0; |
2338 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2339 | sn = &sn_tab[i]; |
f9209915 MDCF |
2340 | available = 1; |
2341 | bs1 = NULL; | |
2342 | ||
2343 | while ((bs1 = bdrv_next(bs1))) { | |
2344 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2345 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2346 | if (ret < 0) { | |
2347 | available = 0; | |
2348 | break; | |
2349 | } | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | if (available) { | |
2354 | available_snapshots[total] = i; | |
2355 | total++; | |
2356 | } | |
a672b469 | 2357 | } |
f9209915 MDCF |
2358 | |
2359 | if (total > 0) { | |
2360 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2361 | for (i = 0; i < total; i++) { | |
2362 | sn = &sn_tab[available_snapshots[i]]; | |
2363 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2364 | } | |
2365 | } else { | |
2366 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2367 | } | |
2368 | ||
7267c094 AL |
2369 | g_free(sn_tab); |
2370 | g_free(available_snapshots); | |
f9209915 | 2371 | |
a672b469 | 2372 | } |
c5705a77 AK |
2373 | |
2374 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2375 | { | |
1ddde087 | 2376 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2377 | memory_region_name(mr), dev); |
2378 | } | |
2379 | ||
2380 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2381 | { | |
2382 | /* Nothing do to while the implementation is in RAMBlock */ | |
2383 | } | |
2384 | ||
2385 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2386 | { | |
2387 | vmstate_register_ram(mr, NULL); | |
2388 | } | |
302dfbeb OW |
2389 | |
2390 | /* | |
2391 | page = zrun nzrun | |
2392 | | zrun nzrun page | |
2393 | ||
2394 | zrun = length | |
2395 | ||
2396 | nzrun = length byte... | |
2397 | ||
2398 | length = uleb128 encoded integer | |
2399 | */ | |
2400 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2401 | uint8_t *dst, int dlen) | |
2402 | { | |
2403 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2404 | int d = 0, i = 0; | |
2405 | long res, xor; | |
2406 | uint8_t *nzrun_start = NULL; | |
2407 | ||
2408 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2409 | sizeof(long))); | |
2410 | ||
2411 | while (i < slen) { | |
2412 | /* overflow */ | |
2413 | if (d + 2 > dlen) { | |
2414 | return -1; | |
2415 | } | |
2416 | ||
2417 | /* not aligned to sizeof(long) */ | |
2418 | res = (slen - i) % sizeof(long); | |
2419 | while (res && old_buf[i] == new_buf[i]) { | |
2420 | zrun_len++; | |
2421 | i++; | |
2422 | res--; | |
2423 | } | |
2424 | ||
2425 | /* word at a time for speed */ | |
2426 | if (!res) { | |
2427 | while (i < slen && | |
2428 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2429 | i += sizeof(long); | |
2430 | zrun_len += sizeof(long); | |
2431 | } | |
2432 | ||
2433 | /* go over the rest */ | |
2434 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2435 | zrun_len++; | |
2436 | i++; | |
2437 | } | |
2438 | } | |
2439 | ||
2440 | /* buffer unchanged */ | |
2441 | if (zrun_len == slen) { | |
2442 | return 0; | |
2443 | } | |
2444 | ||
2445 | /* skip last zero run */ | |
2446 | if (i == slen) { | |
2447 | return d; | |
2448 | } | |
2449 | ||
2450 | d += uleb128_encode_small(dst + d, zrun_len); | |
2451 | ||
2452 | zrun_len = 0; | |
2453 | nzrun_start = new_buf + i; | |
2454 | ||
2455 | /* overflow */ | |
2456 | if (d + 2 > dlen) { | |
2457 | return -1; | |
2458 | } | |
2459 | /* not aligned to sizeof(long) */ | |
2460 | res = (slen - i) % sizeof(long); | |
2461 | while (res && old_buf[i] != new_buf[i]) { | |
2462 | i++; | |
2463 | nzrun_len++; | |
2464 | res--; | |
2465 | } | |
2466 | ||
2467 | /* word at a time for speed, use of 32-bit long okay */ | |
2468 | if (!res) { | |
2469 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2470 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2471 | while (i < slen) { |
2472 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2473 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2474 | /* found the end of an nzrun within the current long */ | |
2475 | while (old_buf[i] != new_buf[i]) { | |
2476 | nzrun_len++; | |
2477 | i++; | |
2478 | } | |
2479 | break; | |
2480 | } else { | |
2481 | i += sizeof(long); | |
2482 | nzrun_len += sizeof(long); | |
2483 | } | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2488 | /* overflow */ | |
2489 | if (d + nzrun_len > dlen) { | |
2490 | return -1; | |
2491 | } | |
2492 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2493 | d += nzrun_len; | |
2494 | nzrun_len = 0; | |
2495 | } | |
2496 | ||
2497 | return d; | |
2498 | } | |
2499 | ||
2500 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2501 | { | |
2502 | int i = 0, d = 0; | |
2503 | int ret; | |
2504 | uint32_t count = 0; | |
2505 | ||
2506 | while (i < slen) { | |
2507 | ||
2508 | /* zrun */ | |
2509 | if ((slen - i) < 2) { | |
2510 | return -1; | |
2511 | } | |
2512 | ||
2513 | ret = uleb128_decode_small(src + i, &count); | |
2514 | if (ret < 0 || (i && !count)) { | |
2515 | return -1; | |
2516 | } | |
2517 | i += ret; | |
2518 | d += count; | |
2519 | ||
2520 | /* overflow */ | |
2521 | if (d > dlen) { | |
2522 | return -1; | |
2523 | } | |
2524 | ||
2525 | /* nzrun */ | |
2526 | if ((slen - i) < 2) { | |
2527 | return -1; | |
2528 | } | |
2529 | ||
2530 | ret = uleb128_decode_small(src + i, &count); | |
2531 | if (ret < 0 || !count) { | |
2532 | return -1; | |
2533 | } | |
2534 | i += ret; | |
2535 | ||
2536 | /* overflow */ | |
2537 | if (d + count > dlen || i + count > slen) { | |
2538 | return -1; | |
2539 | } | |
2540 | ||
2541 | memcpy(dst + d, src + i, count); | |
2542 | d += count; | |
2543 | i += count; | |
2544 | } | |
2545 | ||
2546 | return d; | |
2547 | } |