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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 AL |
24 | #include <unistd.h> |
25 | #include <fcntl.h> | |
a672b469 AL |
26 | #include <time.h> |
27 | #include <errno.h> | |
28 | #include <sys/time.h> | |
29 | #include <zlib.h> | |
30 | ||
71e72a19 | 31 | /* Needed early for CONFIG_BSD etc. */ |
d40cdb10 BS |
32 | #include "config-host.h" |
33 | ||
a672b469 AL |
34 | #ifndef _WIN32 |
35 | #include <sys/times.h> | |
36 | #include <sys/wait.h> | |
37 | #include <termios.h> | |
38 | #include <sys/mman.h> | |
39 | #include <sys/ioctl.h> | |
40 | #include <sys/resource.h> | |
41 | #include <sys/socket.h> | |
42 | #include <netinet/in.h> | |
43 | #include <net/if.h> | |
a672b469 AL |
44 | #include <arpa/inet.h> |
45 | #include <dirent.h> | |
46 | #include <netdb.h> | |
47 | #include <sys/select.h> | |
71e72a19 | 48 | #ifdef CONFIG_BSD |
a672b469 | 49 | #include <sys/stat.h> |
a167ba50 | 50 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) |
a672b469 AL |
51 | #include <libutil.h> |
52 | #else | |
53 | #include <util.h> | |
54 | #endif | |
a672b469 AL |
55 | #ifdef __linux__ |
56 | #include <pty.h> | |
57 | #include <malloc.h> | |
58 | #include <linux/rtc.h> | |
59 | #endif | |
60 | #endif | |
61 | #endif | |
62 | ||
63 | #ifdef _WIN32 | |
49dc768d | 64 | #include <windows.h> |
a672b469 AL |
65 | #include <malloc.h> |
66 | #include <sys/timeb.h> | |
67 | #include <mmsystem.h> | |
68 | #define getopt_long_only getopt_long | |
69 | #define memalign(align, size) malloc(size) | |
70 | #endif | |
71 | ||
511d2b14 BS |
72 | #include "qemu-common.h" |
73 | #include "hw/hw.h" | |
7685ee6a | 74 | #include "hw/qdev.h" |
511d2b14 BS |
75 | #include "net.h" |
76 | #include "monitor.h" | |
77 | #include "sysemu.h" | |
78 | #include "qemu-timer.h" | |
79 | #include "qemu-char.h" | |
511d2b14 BS |
80 | #include "audio/audio.h" |
81 | #include "migration.h" | |
82 | #include "qemu_socket.h" | |
72cf2d4f | 83 | #include "qemu-queue.h" |
2ff68d07 | 84 | #include "qemu-timer.h" |
17a4663e | 85 | #include "cpus.h" |
c5705a77 | 86 | #include "memory.h" |
a7ae8355 | 87 | #include "qmp-commands.h" |
517a13c9 | 88 | #include "trace.h" |
511d2b14 | 89 | |
a672b469 | 90 | #define SELF_ANNOUNCE_ROUNDS 5 |
a672b469 | 91 | |
18995b98 | 92 | #ifndef ETH_P_RARP |
f8778a77 | 93 | #define ETH_P_RARP 0x8035 |
18995b98 N |
94 | #endif |
95 | #define ARP_HTYPE_ETH 0x0001 | |
96 | #define ARP_PTYPE_IP 0x0800 | |
97 | #define ARP_OP_REQUEST_REV 0x3 | |
98 | ||
99 | static int announce_self_create(uint8_t *buf, | |
a672b469 AL |
100 | uint8_t *mac_addr) |
101 | { | |
18995b98 N |
102 | /* Ethernet header. */ |
103 | memset(buf, 0xff, 6); /* destination MAC addr */ | |
104 | memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ | |
105 | *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ | |
106 | ||
107 | /* RARP header. */ | |
108 | *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ | |
109 | *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ | |
110 | *(buf + 18) = 6; /* hardware addr length (ethernet) */ | |
111 | *(buf + 19) = 4; /* protocol addr length (IPv4) */ | |
112 | *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ | |
113 | memcpy(buf + 22, mac_addr, 6); /* source hw addr */ | |
114 | memset(buf + 28, 0x00, 4); /* source protocol addr */ | |
115 | memcpy(buf + 32, mac_addr, 6); /* target hw addr */ | |
116 | memset(buf + 38, 0x00, 4); /* target protocol addr */ | |
117 | ||
118 | /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ | |
119 | memset(buf + 42, 0x00, 18); | |
120 | ||
121 | return 60; /* len (FCS will be added by hardware) */ | |
a672b469 AL |
122 | } |
123 | ||
f401ca22 | 124 | static void qemu_announce_self_iter(NICState *nic, void *opaque) |
a672b469 | 125 | { |
18995b98 | 126 | uint8_t buf[60]; |
f401ca22 MM |
127 | int len; |
128 | ||
129 | len = announce_self_create(buf, nic->conf->macaddr.a); | |
130 | ||
131 | qemu_send_packet_raw(&nic->nc, buf, len); | |
132 | } | |
133 | ||
134 | ||
135 | static void qemu_announce_self_once(void *opaque) | |
136 | { | |
ed8b330b GN |
137 | static int count = SELF_ANNOUNCE_ROUNDS; |
138 | QEMUTimer *timer = *(QEMUTimer **)opaque; | |
a672b469 | 139 | |
f401ca22 MM |
140 | qemu_foreach_nic(qemu_announce_self_iter, NULL); |
141 | ||
18995b98 N |
142 | if (--count) { |
143 | /* delay 50ms, 150ms, 250ms, ... */ | |
7bd427d8 | 144 | qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
18995b98 | 145 | 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
ed8b330b GN |
146 | } else { |
147 | qemu_del_timer(timer); | |
148 | qemu_free_timer(timer); | |
149 | } | |
150 | } | |
151 | ||
152 | void qemu_announce_self(void) | |
153 | { | |
154 | static QEMUTimer *timer; | |
7bd427d8 | 155 | timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
ed8b330b | 156 | qemu_announce_self_once(&timer); |
a672b469 AL |
157 | } |
158 | ||
159 | /***********************************************************/ | |
160 | /* savevm/loadvm support */ | |
161 | ||
162 | #define IO_BUF_SIZE 32768 | |
163 | ||
164 | struct QEMUFile { | |
165 | QEMUFilePutBufferFunc *put_buffer; | |
166 | QEMUFileGetBufferFunc *get_buffer; | |
167 | QEMUFileCloseFunc *close; | |
168 | QEMUFileRateLimit *rate_limit; | |
19629537 | 169 | QEMUFileSetRateLimit *set_rate_limit; |
c163b5ca | 170 | QEMUFileGetRateLimit *get_rate_limit; |
a672b469 AL |
171 | void *opaque; |
172 | int is_write; | |
173 | ||
174 | int64_t buf_offset; /* start of buffer when writing, end of buffer | |
175 | when reading */ | |
176 | int buf_index; | |
177 | int buf_size; /* 0 when writing */ | |
178 | uint8_t buf[IO_BUF_SIZE]; | |
179 | ||
3961b4dd | 180 | int last_error; |
a672b469 AL |
181 | }; |
182 | ||
7f79dd28 | 183 | typedef struct QEMUFileStdio |
a672b469 | 184 | { |
7f79dd28 | 185 | FILE *stdio_file; |
a672b469 | 186 | QEMUFile *file; |
7f79dd28 | 187 | } QEMUFileStdio; |
a672b469 AL |
188 | |
189 | typedef struct QEMUFileSocket | |
190 | { | |
191 | int fd; | |
192 | QEMUFile *file; | |
193 | } QEMUFileSocket; | |
194 | ||
195 | static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
196 | { | |
197 | QEMUFileSocket *s = opaque; | |
198 | ssize_t len; | |
199 | ||
200 | do { | |
00aa0040 | 201 | len = qemu_recv(s->fd, buf, size, 0); |
a672b469 AL |
202 | } while (len == -1 && socket_error() == EINTR); |
203 | ||
204 | if (len == -1) | |
205 | len = -socket_error(); | |
206 | ||
207 | return len; | |
208 | } | |
209 | ||
210 | static int socket_close(void *opaque) | |
211 | { | |
212 | QEMUFileSocket *s = opaque; | |
7267c094 | 213 | g_free(s); |
a672b469 AL |
214 | return 0; |
215 | } | |
216 | ||
7f79dd28 | 217 | static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
a672b469 | 218 | { |
7f79dd28 PB |
219 | QEMUFileStdio *s = opaque; |
220 | return fwrite(buf, 1, size, s->stdio_file); | |
a672b469 AL |
221 | } |
222 | ||
7f79dd28 | 223 | static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 224 | { |
7f79dd28 PB |
225 | QEMUFileStdio *s = opaque; |
226 | FILE *fp = s->stdio_file; | |
8a67ec4d UL |
227 | int bytes; |
228 | ||
229 | do { | |
230 | clearerr(fp); | |
231 | bytes = fread(buf, 1, size, fp); | |
232 | } while ((bytes == 0) && ferror(fp) && (errno == EINTR)); | |
233 | return bytes; | |
a672b469 AL |
234 | } |
235 | ||
7f79dd28 PB |
236 | static int stdio_pclose(void *opaque) |
237 | { | |
238 | QEMUFileStdio *s = opaque; | |
41ef56e6 AL |
239 | int ret; |
240 | ret = pclose(s->stdio_file); | |
26f1af0a EH |
241 | if (ret == -1) { |
242 | ret = -errno; | |
243 | } | |
7267c094 | 244 | g_free(s); |
41ef56e6 | 245 | return ret; |
7f79dd28 PB |
246 | } |
247 | ||
248 | static int stdio_fclose(void *opaque) | |
a672b469 | 249 | { |
7f79dd28 | 250 | QEMUFileStdio *s = opaque; |
0e286705 EH |
251 | int ret = 0; |
252 | if (fclose(s->stdio_file) == EOF) { | |
253 | ret = -errno; | |
254 | } | |
7267c094 | 255 | g_free(s); |
0e286705 | 256 | return ret; |
a672b469 AL |
257 | } |
258 | ||
7f79dd28 | 259 | QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
a672b469 | 260 | { |
7f79dd28 | 261 | QEMUFileStdio *s; |
a672b469 | 262 | |
7f79dd28 | 263 | if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
a672b469 AL |
264 | fprintf(stderr, "qemu_popen: Argument validity check failed\n"); |
265 | return NULL; | |
266 | } | |
267 | ||
7267c094 | 268 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 269 | |
7f79dd28 | 270 | s->stdio_file = stdio_file; |
a672b469 AL |
271 | |
272 | if(mode[0] == 'r') { | |
c163b5ca LS |
273 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, |
274 | NULL, NULL, NULL); | |
a672b469 | 275 | } else { |
c163b5ca LS |
276 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, |
277 | NULL, NULL, NULL); | |
a672b469 | 278 | } |
a672b469 AL |
279 | return s->file; |
280 | } | |
281 | ||
282 | QEMUFile *qemu_popen_cmd(const char *command, const char *mode) | |
283 | { | |
284 | FILE *popen_file; | |
285 | ||
286 | popen_file = popen(command, mode); | |
287 | if(popen_file == NULL) { | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | return qemu_popen(popen_file, mode); | |
292 | } | |
293 | ||
7f79dd28 | 294 | int qemu_stdio_fd(QEMUFile *f) |
8a43b1ea | 295 | { |
7f79dd28 | 296 | QEMUFileStdio *p; |
8a43b1ea CL |
297 | int fd; |
298 | ||
7f79dd28 PB |
299 | p = (QEMUFileStdio *)f->opaque; |
300 | fd = fileno(p->stdio_file); | |
8a43b1ea CL |
301 | |
302 | return fd; | |
303 | } | |
304 | ||
5ac1fad3 PB |
305 | QEMUFile *qemu_fdopen(int fd, const char *mode) |
306 | { | |
307 | QEMUFileStdio *s; | |
308 | ||
309 | if (mode == NULL || | |
310 | (mode[0] != 'r' && mode[0] != 'w') || | |
311 | mode[1] != 'b' || mode[2] != 0) { | |
312 | fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); | |
313 | return NULL; | |
314 | } | |
315 | ||
7267c094 | 316 | s = g_malloc0(sizeof(QEMUFileStdio)); |
5ac1fad3 PB |
317 | s->stdio_file = fdopen(fd, mode); |
318 | if (!s->stdio_file) | |
319 | goto fail; | |
320 | ||
321 | if(mode[0] == 'r') { | |
c163b5ca LS |
322 | s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, |
323 | NULL, NULL, NULL); | |
5ac1fad3 | 324 | } else { |
c163b5ca LS |
325 | s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, |
326 | NULL, NULL, NULL); | |
5ac1fad3 PB |
327 | } |
328 | return s->file; | |
329 | ||
330 | fail: | |
7267c094 | 331 | g_free(s); |
5ac1fad3 PB |
332 | return NULL; |
333 | } | |
334 | ||
a672b469 AL |
335 | QEMUFile *qemu_fopen_socket(int fd) |
336 | { | |
7267c094 | 337 | QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
a672b469 | 338 | |
a672b469 | 339 | s->fd = fd; |
c163b5ca LS |
340 | s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, |
341 | NULL, NULL, NULL); | |
a672b469 AL |
342 | return s->file; |
343 | } | |
344 | ||
a672b469 AL |
345 | static int file_put_buffer(void *opaque, const uint8_t *buf, |
346 | int64_t pos, int size) | |
347 | { | |
348 | QEMUFileStdio *s = opaque; | |
7f79dd28 | 349 | fseek(s->stdio_file, pos, SEEK_SET); |
5fdb3aa1 | 350 | return fwrite(buf, 1, size, s->stdio_file); |
a672b469 AL |
351 | } |
352 | ||
353 | static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) | |
354 | { | |
355 | QEMUFileStdio *s = opaque; | |
7f79dd28 PB |
356 | fseek(s->stdio_file, pos, SEEK_SET); |
357 | return fread(buf, 1, size, s->stdio_file); | |
a672b469 AL |
358 | } |
359 | ||
360 | QEMUFile *qemu_fopen(const char *filename, const char *mode) | |
361 | { | |
362 | QEMUFileStdio *s; | |
363 | ||
7f79dd28 PB |
364 | if (mode == NULL || |
365 | (mode[0] != 'r' && mode[0] != 'w') || | |
366 | mode[1] != 'b' || mode[2] != 0) { | |
090414a3 | 367 | fprintf(stderr, "qemu_fopen: Argument validity check failed\n"); |
7f79dd28 PB |
368 | return NULL; |
369 | } | |
370 | ||
7267c094 | 371 | s = g_malloc0(sizeof(QEMUFileStdio)); |
a672b469 | 372 | |
7f79dd28 PB |
373 | s->stdio_file = fopen(filename, mode); |
374 | if (!s->stdio_file) | |
a672b469 | 375 | goto fail; |
c163b5ca | 376 | |
7f79dd28 | 377 | if(mode[0] == 'w') { |
c163b5ca LS |
378 | s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, |
379 | NULL, NULL, NULL); | |
7f79dd28 | 380 | } else { |
c163b5ca LS |
381 | s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, |
382 | NULL, NULL, NULL); | |
7f79dd28 PB |
383 | } |
384 | return s->file; | |
a672b469 | 385 | fail: |
7267c094 | 386 | g_free(s); |
a672b469 AL |
387 | return NULL; |
388 | } | |
389 | ||
178e08a5 | 390 | static int block_put_buffer(void *opaque, const uint8_t *buf, |
a672b469 AL |
391 | int64_t pos, int size) |
392 | { | |
45566e9c | 393 | bdrv_save_vmstate(opaque, buf, pos, size); |
a672b469 AL |
394 | return size; |
395 | } | |
396 | ||
178e08a5 | 397 | static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
a672b469 | 398 | { |
45566e9c | 399 | return bdrv_load_vmstate(opaque, buf, pos, size); |
a672b469 AL |
400 | } |
401 | ||
402 | static int bdrv_fclose(void *opaque) | |
403 | { | |
ad492c92 | 404 | return bdrv_flush(opaque); |
a672b469 AL |
405 | } |
406 | ||
45566e9c | 407 | static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
a672b469 | 408 | { |
a672b469 | 409 | if (is_writable) |
c163b5ca LS |
410 | return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
411 | NULL, NULL, NULL); | |
412 | return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); | |
a672b469 AL |
413 | } |
414 | ||
415 | QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer, | |
416 | QEMUFileGetBufferFunc *get_buffer, | |
417 | QEMUFileCloseFunc *close, | |
19629537 | 418 | QEMUFileRateLimit *rate_limit, |
c163b5ca LS |
419 | QEMUFileSetRateLimit *set_rate_limit, |
420 | QEMUFileGetRateLimit *get_rate_limit) | |
a672b469 AL |
421 | { |
422 | QEMUFile *f; | |
423 | ||
7267c094 | 424 | f = g_malloc0(sizeof(QEMUFile)); |
a672b469 AL |
425 | |
426 | f->opaque = opaque; | |
427 | f->put_buffer = put_buffer; | |
428 | f->get_buffer = get_buffer; | |
429 | f->close = close; | |
430 | f->rate_limit = rate_limit; | |
19629537 | 431 | f->set_rate_limit = set_rate_limit; |
c163b5ca | 432 | f->get_rate_limit = get_rate_limit; |
a672b469 AL |
433 | f->is_write = 0; |
434 | ||
435 | return f; | |
436 | } | |
437 | ||
624b9cc2 | 438 | int qemu_file_get_error(QEMUFile *f) |
a672b469 | 439 | { |
3961b4dd | 440 | return f->last_error; |
a672b469 AL |
441 | } |
442 | ||
dcd1d224 | 443 | void qemu_file_set_error(QEMUFile *f, int ret) |
4dabe248 | 444 | { |
3961b4dd | 445 | f->last_error = ret; |
4dabe248 AL |
446 | } |
447 | ||
d82ca915 EH |
448 | /** Sets last_error conditionally |
449 | * | |
450 | * Sets last_error only if ret is negative _and_ no error | |
451 | * was set before. | |
452 | */ | |
453 | static void qemu_file_set_if_error(QEMUFile *f, int ret) | |
454 | { | |
455 | if (ret < 0 && !f->last_error) { | |
456 | qemu_file_set_error(f, ret); | |
457 | } | |
458 | } | |
459 | ||
460 | /** Flushes QEMUFile buffer | |
461 | * | |
462 | * In case of error, last_error is set. | |
463 | */ | |
a672b469 AL |
464 | void qemu_fflush(QEMUFile *f) |
465 | { | |
466 | if (!f->put_buffer) | |
467 | return; | |
468 | ||
469 | if (f->is_write && f->buf_index > 0) { | |
470 | int len; | |
471 | ||
472 | len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); | |
473 | if (len > 0) | |
474 | f->buf_offset += f->buf_index; | |
475 | else | |
c29110d5 | 476 | qemu_file_set_error(f, -EINVAL); |
a672b469 AL |
477 | f->buf_index = 0; |
478 | } | |
479 | } | |
480 | ||
481 | static void qemu_fill_buffer(QEMUFile *f) | |
482 | { | |
483 | int len; | |
0046c45b | 484 | int pending; |
a672b469 AL |
485 | |
486 | if (!f->get_buffer) | |
487 | return; | |
488 | ||
489 | if (f->is_write) | |
490 | abort(); | |
491 | ||
0046c45b JQ |
492 | pending = f->buf_size - f->buf_index; |
493 | if (pending > 0) { | |
494 | memmove(f->buf, f->buf + f->buf_index, pending); | |
495 | } | |
496 | f->buf_index = 0; | |
497 | f->buf_size = pending; | |
498 | ||
499 | len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, | |
500 | IO_BUF_SIZE - pending); | |
a672b469 | 501 | if (len > 0) { |
0046c45b | 502 | f->buf_size += len; |
a672b469 | 503 | f->buf_offset += len; |
fa39a30f JQ |
504 | } else if (len == 0) { |
505 | f->last_error = -EIO; | |
a672b469 | 506 | } else if (len != -EAGAIN) |
c29110d5 | 507 | qemu_file_set_error(f, len); |
a672b469 AL |
508 | } |
509 | ||
d82ca915 EH |
510 | /** Calls close function and set last_error if needed |
511 | * | |
512 | * Internal function. qemu_fflush() must be called before this. | |
513 | * | |
514 | * Returns f->close() return value, or 0 if close function is not set. | |
515 | */ | |
516 | static int qemu_close(QEMUFile *f) | |
a672b469 AL |
517 | { |
518 | int ret = 0; | |
d82ca915 | 519 | if (f->close) { |
a672b469 | 520 | ret = f->close(f->opaque); |
d82ca915 EH |
521 | qemu_file_set_if_error(f, ret); |
522 | } | |
523 | return ret; | |
524 | } | |
525 | ||
526 | /** Closes the file | |
527 | * | |
528 | * Returns negative error value if any error happened on previous operations or | |
529 | * while closing the file. Returns 0 or positive number on success. | |
530 | * | |
531 | * The meaning of return value on success depends on the specific backend | |
532 | * being used. | |
533 | */ | |
534 | int qemu_fclose(QEMUFile *f) | |
535 | { | |
536 | int ret; | |
537 | qemu_fflush(f); | |
538 | ret = qemu_close(f); | |
539 | /* If any error was spotted before closing, we should report it | |
540 | * instead of the close() return value. | |
541 | */ | |
542 | if (f->last_error) { | |
543 | ret = f->last_error; | |
544 | } | |
7267c094 | 545 | g_free(f); |
a672b469 AL |
546 | return ret; |
547 | } | |
548 | ||
549 | void qemu_file_put_notify(QEMUFile *f) | |
550 | { | |
551 | f->put_buffer(f->opaque, NULL, 0, 0); | |
552 | } | |
553 | ||
554 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
555 | { | |
556 | int l; | |
557 | ||
3961b4dd | 558 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
559 | fprintf(stderr, |
560 | "Attempted to write to buffer while read buffer is not empty\n"); | |
561 | abort(); | |
562 | } | |
563 | ||
3961b4dd | 564 | while (!f->last_error && size > 0) { |
a672b469 AL |
565 | l = IO_BUF_SIZE - f->buf_index; |
566 | if (l > size) | |
567 | l = size; | |
568 | memcpy(f->buf + f->buf_index, buf, l); | |
569 | f->is_write = 1; | |
570 | f->buf_index += l; | |
571 | buf += l; | |
572 | size -= l; | |
573 | if (f->buf_index >= IO_BUF_SIZE) | |
574 | qemu_fflush(f); | |
575 | } | |
576 | } | |
577 | ||
578 | void qemu_put_byte(QEMUFile *f, int v) | |
579 | { | |
3961b4dd | 580 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
581 | fprintf(stderr, |
582 | "Attempted to write to buffer while read buffer is not empty\n"); | |
583 | abort(); | |
584 | } | |
585 | ||
586 | f->buf[f->buf_index++] = v; | |
587 | f->is_write = 1; | |
588 | if (f->buf_index >= IO_BUF_SIZE) | |
589 | qemu_fflush(f); | |
590 | } | |
591 | ||
c6380724 | 592 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 593 | { |
c6380724 JQ |
594 | if (f->buf_index + size <= f->buf_size) { |
595 | f->buf_index += size; | |
596 | } | |
597 | } | |
598 | ||
599 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 600 | { |
c6380724 JQ |
601 | int pending; |
602 | int index; | |
a672b469 | 603 | |
b9ce1454 | 604 | if (f->is_write) { |
a672b469 | 605 | abort(); |
b9ce1454 | 606 | } |
a672b469 | 607 | |
c6380724 JQ |
608 | index = f->buf_index + offset; |
609 | pending = f->buf_size - index; | |
610 | if (pending < size) { | |
611 | qemu_fill_buffer(f); | |
612 | index = f->buf_index + offset; | |
613 | pending = f->buf_size - index; | |
614 | } | |
615 | ||
616 | if (pending <= 0) { | |
617 | return 0; | |
618 | } | |
619 | if (size > pending) { | |
620 | size = pending; | |
621 | } | |
622 | ||
623 | memcpy(buf, f->buf + index, size); | |
624 | return size; | |
625 | } | |
626 | ||
627 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
628 | { | |
629 | int pending = size; | |
630 | int done = 0; | |
631 | ||
632 | while (pending > 0) { | |
633 | int res; | |
634 | ||
635 | res = qemu_peek_buffer(f, buf, pending, 0); | |
636 | if (res == 0) { | |
637 | return done; | |
a672b469 | 638 | } |
c6380724 JQ |
639 | qemu_file_skip(f, res); |
640 | buf += res; | |
641 | pending -= res; | |
642 | done += res; | |
a672b469 | 643 | } |
c6380724 | 644 | return done; |
a672b469 AL |
645 | } |
646 | ||
c6380724 | 647 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 648 | { |
c6380724 JQ |
649 | int index = f->buf_index + offset; |
650 | ||
b9ce1454 | 651 | if (f->is_write) { |
811814bd | 652 | abort(); |
b9ce1454 | 653 | } |
811814bd | 654 | |
c6380724 | 655 | if (index >= f->buf_size) { |
811814bd | 656 | qemu_fill_buffer(f); |
c6380724 JQ |
657 | index = f->buf_index + offset; |
658 | if (index >= f->buf_size) { | |
811814bd | 659 | return 0; |
b9ce1454 | 660 | } |
811814bd | 661 | } |
c6380724 | 662 | return f->buf[index]; |
811814bd JQ |
663 | } |
664 | ||
a672b469 AL |
665 | int qemu_get_byte(QEMUFile *f) |
666 | { | |
65f3bb3d | 667 | int result; |
a672b469 | 668 | |
c6380724 JQ |
669 | result = qemu_peek_byte(f, 0); |
670 | qemu_file_skip(f, 1); | |
65f3bb3d | 671 | return result; |
a672b469 AL |
672 | } |
673 | ||
674 | int64_t qemu_ftell(QEMUFile *f) | |
675 | { | |
676 | return f->buf_offset - f->buf_size + f->buf_index; | |
677 | } | |
678 | ||
679 | int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence) | |
680 | { | |
681 | if (whence == SEEK_SET) { | |
682 | /* nothing to do */ | |
683 | } else if (whence == SEEK_CUR) { | |
684 | pos += qemu_ftell(f); | |
685 | } else { | |
686 | /* SEEK_END not supported */ | |
687 | return -1; | |
688 | } | |
689 | if (f->put_buffer) { | |
690 | qemu_fflush(f); | |
691 | f->buf_offset = pos; | |
692 | } else { | |
693 | f->buf_offset = pos; | |
694 | f->buf_index = 0; | |
695 | f->buf_size = 0; | |
696 | } | |
697 | return pos; | |
698 | } | |
699 | ||
700 | int qemu_file_rate_limit(QEMUFile *f) | |
701 | { | |
702 | if (f->rate_limit) | |
703 | return f->rate_limit(f->opaque); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
3d002df3 | 708 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca LS |
709 | { |
710 | if (f->get_rate_limit) | |
711 | return f->get_rate_limit(f->opaque); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
3d002df3 | 716 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 717 | { |
0bb05eaf GC |
718 | /* any failed or completed migration keeps its state to allow probing of |
719 | * migration data, but has no associated file anymore */ | |
720 | if (f && f->set_rate_limit) | |
19629537 GC |
721 | return f->set_rate_limit(f->opaque, new_rate); |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
a672b469 AL |
726 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
727 | { | |
728 | qemu_put_byte(f, v >> 8); | |
729 | qemu_put_byte(f, v); | |
730 | } | |
731 | ||
732 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
733 | { | |
734 | qemu_put_byte(f, v >> 24); | |
735 | qemu_put_byte(f, v >> 16); | |
736 | qemu_put_byte(f, v >> 8); | |
737 | qemu_put_byte(f, v); | |
738 | } | |
739 | ||
740 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
741 | { | |
742 | qemu_put_be32(f, v >> 32); | |
743 | qemu_put_be32(f, v); | |
744 | } | |
745 | ||
746 | unsigned int qemu_get_be16(QEMUFile *f) | |
747 | { | |
748 | unsigned int v; | |
749 | v = qemu_get_byte(f) << 8; | |
750 | v |= qemu_get_byte(f); | |
751 | return v; | |
752 | } | |
753 | ||
754 | unsigned int qemu_get_be32(QEMUFile *f) | |
755 | { | |
756 | unsigned int v; | |
757 | v = qemu_get_byte(f) << 24; | |
758 | v |= qemu_get_byte(f) << 16; | |
759 | v |= qemu_get_byte(f) << 8; | |
760 | v |= qemu_get_byte(f); | |
761 | return v; | |
762 | } | |
763 | ||
764 | uint64_t qemu_get_be64(QEMUFile *f) | |
765 | { | |
766 | uint64_t v; | |
767 | v = (uint64_t)qemu_get_be32(f) << 32; | |
768 | v |= qemu_get_be32(f); | |
769 | return v; | |
770 | } | |
771 | ||
2ff68d07 PB |
772 | |
773 | /* timer */ | |
774 | ||
775 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
776 | { | |
777 | uint64_t expire_time; | |
778 | ||
779 | expire_time = qemu_timer_expire_time_ns(ts); | |
780 | qemu_put_be64(f, expire_time); | |
781 | } | |
782 | ||
783 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
784 | { | |
785 | uint64_t expire_time; | |
786 | ||
787 | expire_time = qemu_get_be64(f); | |
788 | if (expire_time != -1) { | |
789 | qemu_mod_timer_ns(ts, expire_time); | |
790 | } else { | |
791 | qemu_del_timer(ts); | |
792 | } | |
793 | } | |
794 | ||
795 | ||
cdae5cfb GH |
796 | /* bool */ |
797 | ||
798 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
799 | { | |
800 | bool *v = pv; | |
801 | *v = qemu_get_byte(f); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
806 | { | |
807 | bool *v = pv; | |
808 | qemu_put_byte(f, *v); | |
809 | } | |
810 | ||
811 | const VMStateInfo vmstate_info_bool = { | |
812 | .name = "bool", | |
813 | .get = get_bool, | |
814 | .put = put_bool, | |
815 | }; | |
816 | ||
9ed7d6ae JQ |
817 | /* 8 bit int */ |
818 | ||
819 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
820 | { | |
821 | int8_t *v = pv; | |
822 | qemu_get_s8s(f, v); | |
823 | return 0; | |
824 | } | |
825 | ||
84e2e3eb | 826 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 827 | { |
84e2e3eb | 828 | int8_t *v = pv; |
9ed7d6ae JQ |
829 | qemu_put_s8s(f, v); |
830 | } | |
831 | ||
832 | const VMStateInfo vmstate_info_int8 = { | |
833 | .name = "int8", | |
834 | .get = get_int8, | |
835 | .put = put_int8, | |
836 | }; | |
837 | ||
838 | /* 16 bit int */ | |
839 | ||
840 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
841 | { | |
842 | int16_t *v = pv; | |
843 | qemu_get_sbe16s(f, v); | |
844 | return 0; | |
845 | } | |
846 | ||
84e2e3eb | 847 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 848 | { |
84e2e3eb | 849 | int16_t *v = pv; |
9ed7d6ae JQ |
850 | qemu_put_sbe16s(f, v); |
851 | } | |
852 | ||
853 | const VMStateInfo vmstate_info_int16 = { | |
854 | .name = "int16", | |
855 | .get = get_int16, | |
856 | .put = put_int16, | |
857 | }; | |
858 | ||
859 | /* 32 bit int */ | |
860 | ||
861 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
862 | { | |
863 | int32_t *v = pv; | |
864 | qemu_get_sbe32s(f, v); | |
865 | return 0; | |
866 | } | |
867 | ||
84e2e3eb | 868 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 869 | { |
84e2e3eb | 870 | int32_t *v = pv; |
9ed7d6ae JQ |
871 | qemu_put_sbe32s(f, v); |
872 | } | |
873 | ||
874 | const VMStateInfo vmstate_info_int32 = { | |
875 | .name = "int32", | |
876 | .get = get_int32, | |
877 | .put = put_int32, | |
878 | }; | |
879 | ||
82501660 JQ |
880 | /* 32 bit int. See that the received value is the same than the one |
881 | in the field */ | |
882 | ||
883 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
884 | { | |
885 | int32_t *v = pv; | |
886 | int32_t v2; | |
887 | qemu_get_sbe32s(f, &v2); | |
888 | ||
889 | if (*v == v2) | |
890 | return 0; | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | const VMStateInfo vmstate_info_int32_equal = { | |
895 | .name = "int32 equal", | |
896 | .get = get_int32_equal, | |
897 | .put = put_int32, | |
898 | }; | |
899 | ||
0a031e0a JQ |
900 | /* 32 bit int. See that the received value is the less or the same |
901 | than the one in the field */ | |
902 | ||
903 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
904 | { | |
905 | int32_t *old = pv; | |
906 | int32_t new; | |
907 | qemu_get_sbe32s(f, &new); | |
908 | ||
909 | if (*old <= new) | |
910 | return 0; | |
911 | return -EINVAL; | |
912 | } | |
913 | ||
914 | const VMStateInfo vmstate_info_int32_le = { | |
915 | .name = "int32 equal", | |
916 | .get = get_int32_le, | |
917 | .put = put_int32, | |
918 | }; | |
919 | ||
9ed7d6ae JQ |
920 | /* 64 bit int */ |
921 | ||
922 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
923 | { | |
924 | int64_t *v = pv; | |
925 | qemu_get_sbe64s(f, v); | |
926 | return 0; | |
927 | } | |
928 | ||
84e2e3eb | 929 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 930 | { |
84e2e3eb | 931 | int64_t *v = pv; |
9ed7d6ae JQ |
932 | qemu_put_sbe64s(f, v); |
933 | } | |
934 | ||
935 | const VMStateInfo vmstate_info_int64 = { | |
936 | .name = "int64", | |
937 | .get = get_int64, | |
938 | .put = put_int64, | |
939 | }; | |
940 | ||
941 | /* 8 bit unsigned int */ | |
942 | ||
943 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
944 | { | |
945 | uint8_t *v = pv; | |
946 | qemu_get_8s(f, v); | |
947 | return 0; | |
948 | } | |
949 | ||
84e2e3eb | 950 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 951 | { |
84e2e3eb | 952 | uint8_t *v = pv; |
9ed7d6ae JQ |
953 | qemu_put_8s(f, v); |
954 | } | |
955 | ||
956 | const VMStateInfo vmstate_info_uint8 = { | |
957 | .name = "uint8", | |
958 | .get = get_uint8, | |
959 | .put = put_uint8, | |
960 | }; | |
961 | ||
962 | /* 16 bit unsigned int */ | |
963 | ||
964 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
965 | { | |
966 | uint16_t *v = pv; | |
967 | qemu_get_be16s(f, v); | |
968 | return 0; | |
969 | } | |
970 | ||
84e2e3eb | 971 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 972 | { |
84e2e3eb | 973 | uint16_t *v = pv; |
9ed7d6ae JQ |
974 | qemu_put_be16s(f, v); |
975 | } | |
976 | ||
977 | const VMStateInfo vmstate_info_uint16 = { | |
978 | .name = "uint16", | |
979 | .get = get_uint16, | |
980 | .put = put_uint16, | |
981 | }; | |
982 | ||
983 | /* 32 bit unsigned int */ | |
984 | ||
985 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
986 | { | |
987 | uint32_t *v = pv; | |
988 | qemu_get_be32s(f, v); | |
989 | return 0; | |
990 | } | |
991 | ||
84e2e3eb | 992 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 993 | { |
84e2e3eb | 994 | uint32_t *v = pv; |
9ed7d6ae JQ |
995 | qemu_put_be32s(f, v); |
996 | } | |
997 | ||
998 | const VMStateInfo vmstate_info_uint32 = { | |
999 | .name = "uint32", | |
1000 | .get = get_uint32, | |
1001 | .put = put_uint32, | |
1002 | }; | |
1003 | ||
9122a8fe JQ |
1004 | /* 32 bit uint. See that the received value is the same than the one |
1005 | in the field */ | |
1006 | ||
1007 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
1008 | { | |
1009 | uint32_t *v = pv; | |
1010 | uint32_t v2; | |
1011 | qemu_get_be32s(f, &v2); | |
1012 | ||
1013 | if (*v == v2) { | |
1014 | return 0; | |
1015 | } | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | ||
1019 | const VMStateInfo vmstate_info_uint32_equal = { | |
1020 | .name = "uint32 equal", | |
1021 | .get = get_uint32_equal, | |
1022 | .put = put_uint32, | |
1023 | }; | |
1024 | ||
9ed7d6ae JQ |
1025 | /* 64 bit unsigned int */ |
1026 | ||
1027 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1028 | { | |
1029 | uint64_t *v = pv; | |
1030 | qemu_get_be64s(f, v); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
84e2e3eb | 1034 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1035 | { |
84e2e3eb | 1036 | uint64_t *v = pv; |
9ed7d6ae JQ |
1037 | qemu_put_be64s(f, v); |
1038 | } | |
1039 | ||
1040 | const VMStateInfo vmstate_info_uint64 = { | |
1041 | .name = "uint64", | |
1042 | .get = get_uint64, | |
1043 | .put = put_uint64, | |
1044 | }; | |
1045 | ||
80cd83e7 JQ |
1046 | /* 8 bit int. See that the received value is the same than the one |
1047 | in the field */ | |
1048 | ||
1049 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1050 | { | |
1051 | uint8_t *v = pv; | |
1052 | uint8_t v2; | |
1053 | qemu_get_8s(f, &v2); | |
1054 | ||
1055 | if (*v == v2) | |
1056 | return 0; | |
1057 | return -EINVAL; | |
1058 | } | |
1059 | ||
1060 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1061 | .name = "uint8 equal", |
80cd83e7 JQ |
1062 | .get = get_uint8_equal, |
1063 | .put = put_uint8, | |
1064 | }; | |
1065 | ||
dc3b83a0 JQ |
1066 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1067 | in the field */ | |
1068 | ||
1069 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1070 | { | |
1071 | uint16_t *v = pv; | |
1072 | uint16_t v2; | |
1073 | qemu_get_be16s(f, &v2); | |
1074 | ||
1075 | if (*v == v2) | |
1076 | return 0; | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | ||
1080 | const VMStateInfo vmstate_info_uint16_equal = { | |
1081 | .name = "uint16 equal", | |
1082 | .get = get_uint16_equal, | |
1083 | .put = put_uint16, | |
1084 | }; | |
1085 | ||
dde0463b JQ |
1086 | /* timers */ |
1087 | ||
1088 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1089 | { | |
1090 | QEMUTimer *v = pv; | |
1091 | qemu_get_timer(f, v); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
84e2e3eb | 1095 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1096 | { |
84e2e3eb | 1097 | QEMUTimer *v = pv; |
dde0463b JQ |
1098 | qemu_put_timer(f, v); |
1099 | } | |
1100 | ||
1101 | const VMStateInfo vmstate_info_timer = { | |
1102 | .name = "timer", | |
1103 | .get = get_timer, | |
1104 | .put = put_timer, | |
1105 | }; | |
1106 | ||
6f67c50f JQ |
1107 | /* uint8_t buffers */ |
1108 | ||
1109 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1110 | { | |
1111 | uint8_t *v = pv; | |
1112 | qemu_get_buffer(f, v, size); | |
1113 | return 0; | |
1114 | } | |
1115 | ||
84e2e3eb | 1116 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1117 | { |
84e2e3eb | 1118 | uint8_t *v = pv; |
6f67c50f JQ |
1119 | qemu_put_buffer(f, v, size); |
1120 | } | |
1121 | ||
1122 | const VMStateInfo vmstate_info_buffer = { | |
1123 | .name = "buffer", | |
1124 | .get = get_buffer, | |
1125 | .put = put_buffer, | |
1126 | }; | |
1127 | ||
76507c75 | 1128 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1129 | not useful anymore */ |
76507c75 JQ |
1130 | |
1131 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1132 | { | |
21174c34 JK |
1133 | uint8_t buf[1024]; |
1134 | int block_len; | |
1135 | ||
1136 | while (size > 0) { | |
1137 | block_len = MIN(sizeof(buf), size); | |
1138 | size -= block_len; | |
1139 | qemu_get_buffer(f, buf, block_len); | |
1140 | } | |
1141 | return 0; | |
76507c75 JQ |
1142 | } |
1143 | ||
1144 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1145 | { | |
21174c34 JK |
1146 | static const uint8_t buf[1024]; |
1147 | int block_len; | |
1148 | ||
1149 | while (size > 0) { | |
1150 | block_len = MIN(sizeof(buf), size); | |
1151 | size -= block_len; | |
1152 | qemu_put_buffer(f, buf, block_len); | |
1153 | } | |
76507c75 JQ |
1154 | } |
1155 | ||
1156 | const VMStateInfo vmstate_info_unused_buffer = { | |
1157 | .name = "unused_buffer", | |
1158 | .get = get_unused_buffer, | |
1159 | .put = put_unused_buffer, | |
1160 | }; | |
1161 | ||
7685ee6a AW |
1162 | typedef struct CompatEntry { |
1163 | char idstr[256]; | |
1164 | int instance_id; | |
1165 | } CompatEntry; | |
1166 | ||
a672b469 | 1167 | typedef struct SaveStateEntry { |
72cf2d4f | 1168 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1169 | char idstr[256]; |
1170 | int instance_id; | |
4d2ffa08 | 1171 | int alias_id; |
a672b469 AL |
1172 | int version_id; |
1173 | int section_id; | |
c163b5ca | 1174 | SaveSetParamsHandler *set_params; |
a672b469 AL |
1175 | SaveLiveStateHandler *save_live_state; |
1176 | SaveStateHandler *save_state; | |
1177 | LoadStateHandler *load_state; | |
9ed7d6ae | 1178 | const VMStateDescription *vmsd; |
a672b469 | 1179 | void *opaque; |
7685ee6a | 1180 | CompatEntry *compat; |
24312968 | 1181 | int no_migrate; |
a7ae8355 | 1182 | int is_ram; |
a672b469 AL |
1183 | } SaveStateEntry; |
1184 | ||
c163b5ca | 1185 | |
72cf2d4f BS |
1186 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1187 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1188 | static int global_section_id; |
a672b469 | 1189 | |
8718e999 JQ |
1190 | static int calculate_new_instance_id(const char *idstr) |
1191 | { | |
1192 | SaveStateEntry *se; | |
1193 | int instance_id = 0; | |
1194 | ||
72cf2d4f | 1195 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1196 | if (strcmp(idstr, se->idstr) == 0 |
1197 | && instance_id <= se->instance_id) { | |
1198 | instance_id = se->instance_id + 1; | |
1199 | } | |
1200 | } | |
1201 | return instance_id; | |
1202 | } | |
1203 | ||
7685ee6a AW |
1204 | static int calculate_compat_instance_id(const char *idstr) |
1205 | { | |
1206 | SaveStateEntry *se; | |
1207 | int instance_id = 0; | |
1208 | ||
1209 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1210 | if (!se->compat) | |
1211 | continue; | |
1212 | ||
1213 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1214 | && instance_id <= se->compat->instance_id) { | |
1215 | instance_id = se->compat->instance_id + 1; | |
1216 | } | |
1217 | } | |
1218 | return instance_id; | |
1219 | } | |
1220 | ||
a672b469 AL |
1221 | /* TODO: Individual devices generally have very little idea about the rest |
1222 | of the system, so instance_id should be removed/replaced. | |
1223 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1224 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1225 | int register_savevm_live(DeviceState *dev, |
1226 | const char *idstr, | |
a672b469 AL |
1227 | int instance_id, |
1228 | int version_id, | |
c163b5ca | 1229 | SaveSetParamsHandler *set_params, |
a672b469 AL |
1230 | SaveLiveStateHandler *save_live_state, |
1231 | SaveStateHandler *save_state, | |
1232 | LoadStateHandler *load_state, | |
1233 | void *opaque) | |
1234 | { | |
8718e999 | 1235 | SaveStateEntry *se; |
a672b469 | 1236 | |
7267c094 | 1237 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1238 | se->version_id = version_id; |
1239 | se->section_id = global_section_id++; | |
c163b5ca | 1240 | se->set_params = set_params; |
a672b469 AL |
1241 | se->save_live_state = save_live_state; |
1242 | se->save_state = save_state; | |
1243 | se->load_state = load_state; | |
1244 | se->opaque = opaque; | |
9ed7d6ae | 1245 | se->vmsd = NULL; |
24312968 | 1246 | se->no_migrate = 0; |
a7ae8355 SS |
1247 | /* if this is a live_savem then set is_ram */ |
1248 | if (save_live_state != NULL) { | |
1249 | se->is_ram = 1; | |
1250 | } | |
a672b469 | 1251 | |
09e5ab63 AL |
1252 | if (dev) { |
1253 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1254 | if (id) { |
1255 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1256 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1257 | g_free(id); |
7685ee6a | 1258 | |
7267c094 | 1259 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1260 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1261 | se->compat->instance_id = instance_id == -1 ? | |
1262 | calculate_compat_instance_id(idstr) : instance_id; | |
1263 | instance_id = -1; | |
1264 | } | |
1265 | } | |
1266 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1267 | ||
8718e999 | 1268 | if (instance_id == -1) { |
7685ee6a | 1269 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1270 | } else { |
1271 | se->instance_id = instance_id; | |
a672b469 | 1272 | } |
7685ee6a | 1273 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1274 | /* add at the end of list */ |
72cf2d4f | 1275 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1276 | return 0; |
1277 | } | |
1278 | ||
0be71e32 AW |
1279 | int register_savevm(DeviceState *dev, |
1280 | const char *idstr, | |
a672b469 AL |
1281 | int instance_id, |
1282 | int version_id, | |
1283 | SaveStateHandler *save_state, | |
1284 | LoadStateHandler *load_state, | |
1285 | void *opaque) | |
1286 | { | |
0be71e32 | 1287 | return register_savevm_live(dev, idstr, instance_id, version_id, |
c163b5ca | 1288 | NULL, NULL, save_state, load_state, opaque); |
a672b469 AL |
1289 | } |
1290 | ||
0be71e32 | 1291 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1292 | { |
8718e999 | 1293 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1294 | char id[256] = ""; |
1295 | ||
09e5ab63 AL |
1296 | if (dev) { |
1297 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1298 | if (path) { |
1299 | pstrcpy(id, sizeof(id), path); | |
1300 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1301 | g_free(path); |
7685ee6a AW |
1302 | } |
1303 | } | |
1304 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1305 | |
72cf2d4f | 1306 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1307 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1308 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1309 | if (se->compat) { |
7267c094 | 1310 | g_free(se->compat); |
69e58af9 | 1311 | } |
7267c094 | 1312 | g_free(se); |
41bd13af | 1313 | } |
41bd13af AL |
1314 | } |
1315 | } | |
1316 | ||
0be71e32 | 1317 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1318 | const VMStateDescription *vmsd, |
1319 | void *opaque, int alias_id, | |
1320 | int required_for_version) | |
9ed7d6ae | 1321 | { |
8718e999 | 1322 | SaveStateEntry *se; |
9ed7d6ae | 1323 | |
4d2ffa08 JK |
1324 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1325 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1326 | ||
7267c094 | 1327 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1328 | se->version_id = vmsd->version_id; |
1329 | se->section_id = global_section_id++; | |
1330 | se->save_live_state = NULL; | |
1331 | se->save_state = NULL; | |
1332 | se->load_state = NULL; | |
1333 | se->opaque = opaque; | |
1334 | se->vmsd = vmsd; | |
4d2ffa08 | 1335 | se->alias_id = alias_id; |
2837c8ea | 1336 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1337 | |
09e5ab63 AL |
1338 | if (dev) { |
1339 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1340 | if (id) { |
1341 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1342 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1343 | g_free(id); |
7685ee6a | 1344 | |
7267c094 | 1345 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1346 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1347 | se->compat->instance_id = instance_id == -1 ? | |
1348 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1349 | instance_id = -1; | |
1350 | } | |
1351 | } | |
1352 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1353 | ||
8718e999 | 1354 | if (instance_id == -1) { |
7685ee6a | 1355 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1356 | } else { |
1357 | se->instance_id = instance_id; | |
9ed7d6ae | 1358 | } |
7685ee6a | 1359 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1360 | /* add at the end of list */ |
72cf2d4f | 1361 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1362 | return 0; |
1363 | } | |
1364 | ||
0be71e32 AW |
1365 | int vmstate_register(DeviceState *dev, int instance_id, |
1366 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1367 | { |
0be71e32 AW |
1368 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1369 | opaque, -1, 0); | |
4d2ffa08 JK |
1370 | } |
1371 | ||
0be71e32 AW |
1372 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1373 | void *opaque) | |
9ed7d6ae | 1374 | { |
1eb7538b JQ |
1375 | SaveStateEntry *se, *new_se; |
1376 | ||
72cf2d4f | 1377 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1378 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1379 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1380 | if (se->compat) { |
7267c094 | 1381 | g_free(se->compat); |
69e58af9 | 1382 | } |
7267c094 | 1383 | g_free(se); |
1eb7538b JQ |
1384 | } |
1385 | } | |
9ed7d6ae JQ |
1386 | } |
1387 | ||
811814bd JQ |
1388 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1389 | void *opaque); | |
1390 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1391 | void *opaque); | |
1392 | ||
9ed7d6ae JQ |
1393 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1394 | void *opaque, int version_id) | |
1395 | { | |
1396 | VMStateField *field = vmsd->fields; | |
811814bd | 1397 | int ret; |
9ed7d6ae JQ |
1398 | |
1399 | if (version_id > vmsd->version_id) { | |
1400 | return -EINVAL; | |
1401 | } | |
1402 | if (version_id < vmsd->minimum_version_id_old) { | |
1403 | return -EINVAL; | |
1404 | } | |
1405 | if (version_id < vmsd->minimum_version_id) { | |
1406 | return vmsd->load_state_old(f, opaque, version_id); | |
1407 | } | |
fd4d52de JQ |
1408 | if (vmsd->pre_load) { |
1409 | int ret = vmsd->pre_load(opaque); | |
1410 | if (ret) | |
1411 | return ret; | |
1412 | } | |
9ed7d6ae | 1413 | while(field->name) { |
f11f6a5f JQ |
1414 | if ((field->field_exists && |
1415 | field->field_exists(opaque, version_id)) || | |
1416 | (!field->field_exists && | |
1417 | field->version_id <= version_id)) { | |
f752a6aa | 1418 | void *base_addr = opaque + field->offset; |
811814bd | 1419 | int i, n_elems = 1; |
e61a1e0a | 1420 | int size = field->size; |
9ed7d6ae | 1421 | |
e61a1e0a JQ |
1422 | if (field->flags & VMS_VBUFFER) { |
1423 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1424 | if (field->flags & VMS_MULTIPLY) { |
1425 | size *= field->size; | |
1426 | } | |
e61a1e0a | 1427 | } |
f752a6aa JQ |
1428 | if (field->flags & VMS_ARRAY) { |
1429 | n_elems = field->num; | |
d6698281 JQ |
1430 | } else if (field->flags & VMS_VARRAY_INT32) { |
1431 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1432 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1433 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1434 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1435 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1436 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1437 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1438 | } |
dde0463b | 1439 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1440 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1441 | } |
f752a6aa | 1442 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1443 | void *addr = base_addr + size * i; |
ec245e21 | 1444 | |
19df438b JQ |
1445 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1446 | addr = *(void **)addr; | |
1447 | } | |
ec245e21 | 1448 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1449 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1450 | } else { |
e61a1e0a | 1451 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1452 | |
1453 | } | |
f752a6aa JQ |
1454 | if (ret < 0) { |
1455 | return ret; | |
1456 | } | |
9ed7d6ae JQ |
1457 | } |
1458 | } | |
1459 | field++; | |
1460 | } | |
811814bd JQ |
1461 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1462 | if (ret != 0) { | |
1463 | return ret; | |
1464 | } | |
752ff2fa | 1465 | if (vmsd->post_load) { |
e59fb374 | 1466 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1467 | } |
9ed7d6ae JQ |
1468 | return 0; |
1469 | } | |
1470 | ||
1471 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1472 | void *opaque) |
9ed7d6ae JQ |
1473 | { |
1474 | VMStateField *field = vmsd->fields; | |
1475 | ||
8fb0791d JQ |
1476 | if (vmsd->pre_save) { |
1477 | vmsd->pre_save(opaque); | |
1478 | } | |
9ed7d6ae | 1479 | while(field->name) { |
f11f6a5f JQ |
1480 | if (!field->field_exists || |
1481 | field->field_exists(opaque, vmsd->version_id)) { | |
1482 | void *base_addr = opaque + field->offset; | |
1483 | int i, n_elems = 1; | |
e61a1e0a | 1484 | int size = field->size; |
dde0463b | 1485 | |
e61a1e0a JQ |
1486 | if (field->flags & VMS_VBUFFER) { |
1487 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1488 | if (field->flags & VMS_MULTIPLY) { |
1489 | size *= field->size; | |
1490 | } | |
e61a1e0a | 1491 | } |
f11f6a5f JQ |
1492 | if (field->flags & VMS_ARRAY) { |
1493 | n_elems = field->num; | |
d6698281 JQ |
1494 | } else if (field->flags & VMS_VARRAY_INT32) { |
1495 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1496 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1497 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1498 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1499 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1500 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1501 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1502 | } |
1503 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1504 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1505 | } |
1506 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1507 | void *addr = base_addr + size * i; |
ec245e21 | 1508 | |
8595387e JQ |
1509 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1510 | addr = *(void **)addr; | |
1511 | } | |
f11f6a5f JQ |
1512 | if (field->flags & VMS_STRUCT) { |
1513 | vmstate_save_state(f, field->vmsd, addr); | |
1514 | } else { | |
e61a1e0a | 1515 | field->info->put(f, addr, size); |
f11f6a5f | 1516 | } |
ec245e21 | 1517 | } |
dde0463b | 1518 | } |
9ed7d6ae JQ |
1519 | field++; |
1520 | } | |
811814bd | 1521 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1522 | } |
1523 | ||
4082be4d JQ |
1524 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1525 | { | |
9ed7d6ae JQ |
1526 | if (!se->vmsd) { /* Old style */ |
1527 | return se->load_state(f, se->opaque, version_id); | |
1528 | } | |
1529 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1530 | } |
1531 | ||
dc912121 | 1532 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1533 | { |
9ed7d6ae JQ |
1534 | if (!se->vmsd) { /* Old style */ |
1535 | se->save_state(f, se->opaque); | |
dc912121 | 1536 | return; |
9ed7d6ae JQ |
1537 | } |
1538 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1539 | } |
1540 | ||
a672b469 AL |
1541 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1542 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1543 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1544 | ||
1545 | #define QEMU_VM_EOF 0x00 | |
1546 | #define QEMU_VM_SECTION_START 0x01 | |
1547 | #define QEMU_VM_SECTION_PART 0x02 | |
1548 | #define QEMU_VM_SECTION_END 0x03 | |
1549 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1550 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1551 | |
e1c37d0e | 1552 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1553 | { |
1554 | SaveStateEntry *se; | |
1555 | ||
1556 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1557 | if (se->no_migrate) { | |
e1c37d0e | 1558 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1559 | return true; |
1560 | } | |
1561 | } | |
1562 | return false; | |
1563 | } | |
1564 | ||
6607ae23 IY |
1565 | int qemu_savevm_state_begin(QEMUFile *f, |
1566 | const MigrationParams *params) | |
a672b469 AL |
1567 | { |
1568 | SaveStateEntry *se; | |
39346385 | 1569 | int ret; |
a672b469 | 1570 | |
c163b5ca LS |
1571 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1572 | if(se->set_params == NULL) { | |
1573 | continue; | |
6607ae23 IY |
1574 | } |
1575 | se->set_params(params, se->opaque); | |
c163b5ca LS |
1576 | } |
1577 | ||
a672b469 AL |
1578 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1579 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1580 | ||
72cf2d4f | 1581 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1582 | int len; |
1583 | ||
1584 | if (se->save_live_state == NULL) | |
1585 | continue; | |
1586 | ||
1587 | /* Section type */ | |
1588 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1589 | qemu_put_be32(f, se->section_id); | |
1590 | ||
1591 | /* ID string */ | |
1592 | len = strlen(se->idstr); | |
1593 | qemu_put_byte(f, len); | |
1594 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1595 | ||
1596 | qemu_put_be32(f, se->instance_id); | |
1597 | qemu_put_be32(f, se->version_id); | |
1598 | ||
539de124 | 1599 | ret = se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
2975725f | 1600 | if (ret < 0) { |
539de124 | 1601 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1602 | return ret; |
1603 | } | |
a672b469 | 1604 | } |
624b9cc2 | 1605 | ret = qemu_file_get_error(f); |
39346385 | 1606 | if (ret != 0) { |
539de124 | 1607 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1608 | } |
a672b469 | 1609 | |
39346385 JQ |
1610 | return ret; |
1611 | ||
a672b469 AL |
1612 | } |
1613 | ||
39346385 | 1614 | /* |
07f35073 | 1615 | * this function has three return values: |
39346385 JQ |
1616 | * negative: there was one error, and we have -errno. |
1617 | * 0 : We haven't finished, caller have to go again | |
1618 | * 1 : We have finished, we can go to complete phase | |
1619 | */ | |
539de124 | 1620 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1621 | { |
1622 | SaveStateEntry *se; | |
1623 | int ret = 1; | |
1624 | ||
72cf2d4f | 1625 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1626 | if (se->save_live_state == NULL) |
1627 | continue; | |
1628 | ||
aac844ed JQ |
1629 | if (qemu_file_rate_limit(f)) { |
1630 | return 0; | |
1631 | } | |
517a13c9 | 1632 | trace_savevm_section_start(); |
a672b469 AL |
1633 | /* Section type */ |
1634 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1635 | qemu_put_be32(f, se->section_id); | |
1636 | ||
539de124 | 1637 | ret = se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
517a13c9 JQ |
1638 | trace_savevm_section_end(se->section_id); |
1639 | ||
2975725f | 1640 | if (ret <= 0) { |
90697be8 JK |
1641 | /* Do not proceed to the next vmstate before this one reported |
1642 | completion of the current stage. This serializes the migration | |
1643 | and reduces the probability that a faster changing state is | |
1644 | synchronized over and over again. */ | |
1645 | break; | |
1646 | } | |
a672b469 | 1647 | } |
39346385 JQ |
1648 | if (ret != 0) { |
1649 | return ret; | |
1650 | } | |
624b9cc2 | 1651 | ret = qemu_file_get_error(f); |
39346385 | 1652 | if (ret != 0) { |
539de124 | 1653 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1654 | } |
39346385 | 1655 | return ret; |
a672b469 AL |
1656 | } |
1657 | ||
539de124 | 1658 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1659 | { |
1660 | SaveStateEntry *se; | |
2975725f | 1661 | int ret; |
a672b469 | 1662 | |
ea375f9a JK |
1663 | cpu_synchronize_all_states(); |
1664 | ||
72cf2d4f | 1665 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1666 | if (se->save_live_state == NULL) |
1667 | continue; | |
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 | ||
539de124 | 1674 | ret = se->save_live_state(f, QEMU_VM_SECTION_END, 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 | ||
9ed7d6ae | 1684 | if (se->save_state == NULL && se->vmsd == NULL) |
a672b469 AL |
1685 | continue; |
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 | ||
539de124 | 1709 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1710 | { |
1711 | SaveStateEntry *se; | |
1712 | ||
1713 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1714 | if (se->save_live_state) { | |
539de124 | 1715 | se->save_live_state(f, -1, se->opaque); |
4ec7fcc7 JK |
1716 | } |
1717 | } | |
1718 | } | |
1719 | ||
e1c37d0e | 1720 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1721 | { |
a672b469 | 1722 | int ret; |
6607ae23 IY |
1723 | MigrationParams params = { |
1724 | .blk = 0, | |
1725 | .shared = 0 | |
1726 | }; | |
a672b469 | 1727 | |
e1c37d0e | 1728 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1729 | ret = -EINVAL; |
1730 | goto out; | |
1731 | } | |
1732 | ||
6607ae23 | 1733 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1734 | if (ret < 0) |
1735 | goto out; | |
1736 | ||
1737 | do { | |
539de124 | 1738 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1739 | if (ret < 0) |
1740 | goto out; | |
1741 | } while (ret == 0); | |
1742 | ||
539de124 | 1743 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1744 | |
1745 | out: | |
39346385 | 1746 | if (ret == 0) { |
624b9cc2 | 1747 | ret = qemu_file_get_error(f); |
39346385 | 1748 | } |
a672b469 | 1749 | |
a672b469 AL |
1750 | return ret; |
1751 | } | |
1752 | ||
a7ae8355 SS |
1753 | static int qemu_save_device_state(QEMUFile *f) |
1754 | { | |
1755 | SaveStateEntry *se; | |
1756 | ||
1757 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1758 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1759 | ||
1760 | cpu_synchronize_all_states(); | |
1761 | ||
1762 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1763 | int len; | |
1764 | ||
1765 | if (se->is_ram) { | |
1766 | continue; | |
1767 | } | |
1768 | if (se->save_state == NULL && se->vmsd == NULL) { | |
1769 | continue; | |
1770 | } | |
1771 | ||
1772 | /* Section type */ | |
1773 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1774 | qemu_put_be32(f, se->section_id); | |
1775 | ||
1776 | /* ID string */ | |
1777 | len = strlen(se->idstr); | |
1778 | qemu_put_byte(f, len); | |
1779 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1780 | ||
1781 | qemu_put_be32(f, se->instance_id); | |
1782 | qemu_put_be32(f, se->version_id); | |
1783 | ||
1784 | vmstate_save(f, se); | |
1785 | } | |
1786 | ||
1787 | qemu_put_byte(f, QEMU_VM_EOF); | |
1788 | ||
1789 | return qemu_file_get_error(f); | |
1790 | } | |
1791 | ||
a672b469 AL |
1792 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1793 | { | |
1794 | SaveStateEntry *se; | |
1795 | ||
72cf2d4f | 1796 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1797 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1798 | (instance_id == se->instance_id || |
1799 | instance_id == se->alias_id)) | |
a672b469 | 1800 | return se; |
7685ee6a AW |
1801 | /* Migrating from an older version? */ |
1802 | if (strstr(se->idstr, idstr) && se->compat) { | |
1803 | if (!strcmp(se->compat->idstr, idstr) && | |
1804 | (instance_id == se->compat->instance_id || | |
1805 | instance_id == se->alias_id)) | |
1806 | return se; | |
1807 | } | |
a672b469 AL |
1808 | } |
1809 | return NULL; | |
1810 | } | |
1811 | ||
811814bd JQ |
1812 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1813 | { | |
1814 | while(sub && sub->needed) { | |
1815 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1816 | return sub->vmsd; | |
1817 | } | |
1818 | sub++; | |
1819 | } | |
1820 | return NULL; | |
1821 | } | |
1822 | ||
1823 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1824 | void *opaque) | |
1825 | { | |
c6380724 | 1826 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1827 | char idstr[256]; |
1828 | int ret; | |
c6380724 | 1829 | uint8_t version_id, len, size; |
811814bd JQ |
1830 | const VMStateDescription *sub_vmsd; |
1831 | ||
c6380724 JQ |
1832 | len = qemu_peek_byte(f, 1); |
1833 | if (len < strlen(vmsd->name) + 1) { | |
1834 | /* subsection name has be be "section_name/a" */ | |
1835 | return 0; | |
1836 | } | |
1837 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1838 | if (size != len) { | |
1839 | return 0; | |
1840 | } | |
1841 | idstr[size] = 0; | |
811814bd | 1842 | |
c6380724 JQ |
1843 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1844 | /* it don't have a valid subsection name */ | |
1845 | return 0; | |
1846 | } | |
3da9eebd | 1847 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1848 | if (sub_vmsd == NULL) { |
1849 | return -ENOENT; | |
1850 | } | |
c6380724 JQ |
1851 | qemu_file_skip(f, 1); /* subsection */ |
1852 | qemu_file_skip(f, 1); /* len */ | |
1853 | qemu_file_skip(f, len); /* idstr */ | |
1854 | version_id = qemu_get_be32(f); | |
1855 | ||
811814bd JQ |
1856 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1857 | if (ret) { | |
1858 | return ret; | |
1859 | } | |
1860 | } | |
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1865 | void *opaque) | |
1866 | { | |
1867 | const VMStateSubsection *sub = vmsd->subsections; | |
1868 | ||
1869 | while (sub && sub->needed) { | |
1870 | if (sub->needed(opaque)) { | |
1871 | const VMStateDescription *vmsd = sub->vmsd; | |
1872 | uint8_t len; | |
1873 | ||
1874 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1875 | len = strlen(vmsd->name); | |
1876 | qemu_put_byte(f, len); | |
1877 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1878 | qemu_put_be32(f, vmsd->version_id); | |
1879 | vmstate_save_state(f, vmsd, opaque); | |
1880 | } | |
1881 | sub++; | |
1882 | } | |
1883 | } | |
1884 | ||
a672b469 | 1885 | typedef struct LoadStateEntry { |
72cf2d4f | 1886 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1887 | SaveStateEntry *se; |
1888 | int section_id; | |
1889 | int version_id; | |
a672b469 AL |
1890 | } LoadStateEntry; |
1891 | ||
a672b469 AL |
1892 | int qemu_loadvm_state(QEMUFile *f) |
1893 | { | |
72cf2d4f BS |
1894 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1895 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1896 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1897 | uint8_t section_type; |
1898 | unsigned int v; | |
1899 | int ret; | |
1900 | ||
e1c37d0e | 1901 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1902 | return -EINVAL; |
1903 | } | |
1904 | ||
a672b469 AL |
1905 | v = qemu_get_be32(f); |
1906 | if (v != QEMU_VM_FILE_MAGIC) | |
1907 | return -EINVAL; | |
1908 | ||
1909 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1910 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1911 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1912 | return -ENOTSUP; | |
1913 | } | |
a672b469 AL |
1914 | if (v != QEMU_VM_FILE_VERSION) |
1915 | return -ENOTSUP; | |
1916 | ||
1917 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1918 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1919 | SaveStateEntry *se; |
1920 | char idstr[257]; | |
1921 | int len; | |
1922 | ||
1923 | switch (section_type) { | |
1924 | case QEMU_VM_SECTION_START: | |
1925 | case QEMU_VM_SECTION_FULL: | |
1926 | /* Read section start */ | |
1927 | section_id = qemu_get_be32(f); | |
1928 | len = qemu_get_byte(f); | |
1929 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1930 | idstr[len] = 0; | |
1931 | instance_id = qemu_get_be32(f); | |
1932 | version_id = qemu_get_be32(f); | |
1933 | ||
1934 | /* Find savevm section */ | |
1935 | se = find_se(idstr, instance_id); | |
1936 | if (se == NULL) { | |
1937 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1938 | ret = -EINVAL; | |
1939 | goto out; | |
1940 | } | |
1941 | ||
1942 | /* Validate version */ | |
1943 | if (version_id > se->version_id) { | |
1944 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1945 | version_id, idstr, se->version_id); | |
1946 | ret = -EINVAL; | |
1947 | goto out; | |
1948 | } | |
1949 | ||
1950 | /* Add entry */ | |
7267c094 | 1951 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1952 | |
1953 | le->se = se; | |
1954 | le->section_id = section_id; | |
1955 | le->version_id = version_id; | |
72cf2d4f | 1956 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1957 | |
4082be4d | 1958 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1959 | if (ret < 0) { |
1960 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1961 | instance_id, idstr); | |
1962 | goto out; | |
1963 | } | |
a672b469 AL |
1964 | break; |
1965 | case QEMU_VM_SECTION_PART: | |
1966 | case QEMU_VM_SECTION_END: | |
1967 | section_id = qemu_get_be32(f); | |
1968 | ||
72cf2d4f | 1969 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1970 | if (le->section_id == section_id) { |
1971 | break; | |
1972 | } | |
1973 | } | |
a672b469 AL |
1974 | if (le == NULL) { |
1975 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1976 | ret = -EINVAL; | |
1977 | goto out; | |
1978 | } | |
1979 | ||
4082be4d | 1980 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1981 | if (ret < 0) { |
1982 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
1983 | section_id); | |
1984 | goto out; | |
1985 | } | |
a672b469 AL |
1986 | break; |
1987 | default: | |
1988 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
1989 | ret = -EINVAL; | |
1990 | goto out; | |
1991 | } | |
1992 | } | |
1993 | ||
ea375f9a JK |
1994 | cpu_synchronize_all_post_init(); |
1995 | ||
a672b469 AL |
1996 | ret = 0; |
1997 | ||
1998 | out: | |
72cf2d4f BS |
1999 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2000 | QLIST_REMOVE(le, entry); | |
7267c094 | 2001 | g_free(le); |
a672b469 AL |
2002 | } |
2003 | ||
42802d47 JQ |
2004 | if (ret == 0) { |
2005 | ret = qemu_file_get_error(f); | |
624b9cc2 | 2006 | } |
a672b469 AL |
2007 | |
2008 | return ret; | |
2009 | } | |
2010 | ||
a672b469 AL |
2011 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2012 | const char *name) | |
2013 | { | |
2014 | QEMUSnapshotInfo *sn_tab, *sn; | |
2015 | int nb_sns, i, ret; | |
2016 | ||
2017 | ret = -ENOENT; | |
2018 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2019 | if (nb_sns < 0) | |
2020 | return ret; | |
2021 | for(i = 0; i < nb_sns; i++) { | |
2022 | sn = &sn_tab[i]; | |
2023 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2024 | *sn_info = *sn; | |
2025 | ret = 0; | |
2026 | break; | |
2027 | } | |
2028 | } | |
7267c094 | 2029 | g_free(sn_tab); |
a672b469 AL |
2030 | return ret; |
2031 | } | |
2032 | ||
cb499fb2 KW |
2033 | /* |
2034 | * Deletes snapshots of a given name in all opened images. | |
2035 | */ | |
2036 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2037 | { | |
2038 | BlockDriverState *bs; | |
cb499fb2 KW |
2039 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2040 | int ret; | |
2041 | ||
dbc13590 MA |
2042 | bs = NULL; |
2043 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2044 | if (bdrv_can_snapshot(bs) && |
2045 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2046 | { | |
2047 | ret = bdrv_snapshot_delete(bs, name); | |
2048 | if (ret < 0) { | |
2049 | monitor_printf(mon, | |
2050 | "Error while deleting snapshot on '%s'\n", | |
2051 | bdrv_get_device_name(bs)); | |
2052 | return -1; | |
2053 | } | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | return 0; | |
2058 | } | |
2059 | ||
d54908a5 | 2060 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2061 | { |
2062 | BlockDriverState *bs, *bs1; | |
2063 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2064 | int ret; |
a672b469 AL |
2065 | QEMUFile *f; |
2066 | int saved_vm_running; | |
c2c9a466 | 2067 | uint64_t vm_state_size; |
a672b469 AL |
2068 | #ifdef _WIN32 |
2069 | struct _timeb tb; | |
7d631a11 | 2070 | struct tm *ptm; |
a672b469 AL |
2071 | #else |
2072 | struct timeval tv; | |
7d631a11 | 2073 | struct tm tm; |
a672b469 | 2074 | #endif |
d54908a5 | 2075 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2076 | |
feeee5ac | 2077 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2078 | bs = NULL; |
2079 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2080 | |
07b70bfb | 2081 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2082 | continue; |
2083 | } | |
2084 | ||
2085 | if (!bdrv_can_snapshot(bs)) { | |
2086 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2087 | bdrv_get_device_name(bs)); | |
2088 | return; | |
2089 | } | |
2090 | } | |
2091 | ||
f9092b10 | 2092 | bs = bdrv_snapshots(); |
a672b469 | 2093 | if (!bs) { |
376253ec | 2094 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2095 | return; |
2096 | } | |
a672b469 | 2097 | |
1354869c | 2098 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2099 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2100 | |
cb499fb2 | 2101 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2102 | |
2103 | /* fill auxiliary fields */ | |
2104 | #ifdef _WIN32 | |
2105 | _ftime(&tb); | |
2106 | sn->date_sec = tb.time; | |
2107 | sn->date_nsec = tb.millitm * 1000000; | |
2108 | #else | |
2109 | gettimeofday(&tv, NULL); | |
2110 | sn->date_sec = tv.tv_sec; | |
2111 | sn->date_nsec = tv.tv_usec * 1000; | |
2112 | #endif | |
74475455 | 2113 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2114 | |
7d631a11 MDCF |
2115 | if (name) { |
2116 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2117 | if (ret >= 0) { | |
2118 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2119 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2120 | } else { | |
2121 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2122 | } | |
2123 | } else { | |
2124 | #ifdef _WIN32 | |
55dd9ffa SW |
2125 | time_t t = tb.time; |
2126 | ptm = localtime(&t); | |
7d631a11 MDCF |
2127 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2128 | #else | |
d7d9b528 BS |
2129 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2130 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2131 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2132 | #endif | |
2133 | } | |
2134 | ||
cb499fb2 | 2135 | /* Delete old snapshots of the same name */ |
f139a412 | 2136 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2137 | goto the_end; |
2138 | } | |
2139 | ||
a672b469 | 2140 | /* save the VM state */ |
45566e9c | 2141 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2142 | if (!f) { |
376253ec | 2143 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2144 | goto the_end; |
2145 | } | |
e1c37d0e | 2146 | ret = qemu_savevm_state(f); |
2d22b18f | 2147 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2148 | qemu_fclose(f); |
2149 | if (ret < 0) { | |
376253ec | 2150 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2151 | goto the_end; |
2152 | } | |
2153 | ||
2154 | /* create the snapshots */ | |
2155 | ||
dbc13590 MA |
2156 | bs1 = NULL; |
2157 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2158 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2159 | /* Write VM state size only to the image that contains the state */ |
2160 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2161 | ret = bdrv_snapshot_create(bs1, sn); |
2162 | if (ret < 0) { | |
376253ec AL |
2163 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2164 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2165 | } |
2166 | } | |
2167 | } | |
2168 | ||
2169 | the_end: | |
2170 | if (saved_vm_running) | |
2171 | vm_start(); | |
2172 | } | |
2173 | ||
a7ae8355 SS |
2174 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2175 | { | |
2176 | QEMUFile *f; | |
2177 | int saved_vm_running; | |
2178 | int ret; | |
2179 | ||
2180 | saved_vm_running = runstate_is_running(); | |
2181 | vm_stop(RUN_STATE_SAVE_VM); | |
2182 | ||
2183 | f = qemu_fopen(filename, "wb"); | |
2184 | if (!f) { | |
2185 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2186 | goto the_end; | |
2187 | } | |
2188 | ret = qemu_save_device_state(f); | |
2189 | qemu_fclose(f); | |
2190 | if (ret < 0) { | |
2191 | error_set(errp, QERR_IO_ERROR); | |
2192 | } | |
2193 | ||
2194 | the_end: | |
2195 | if (saved_vm_running) | |
2196 | vm_start(); | |
2197 | return; | |
2198 | } | |
2199 | ||
03cd4655 | 2200 | int load_vmstate(const char *name) |
a672b469 | 2201 | { |
f0aa7a8b | 2202 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2203 | QEMUSnapshotInfo sn; |
a672b469 | 2204 | QEMUFile *f; |
751c6a17 | 2205 | int ret; |
a672b469 | 2206 | |
f0aa7a8b MDCF |
2207 | bs_vm_state = bdrv_snapshots(); |
2208 | if (!bs_vm_state) { | |
2209 | error_report("No block device supports snapshots"); | |
2210 | return -ENOTSUP; | |
2211 | } | |
2212 | ||
2213 | /* Don't even try to load empty VM states */ | |
2214 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2215 | if (ret < 0) { | |
2216 | return ret; | |
2217 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2218 | error_report("This is a disk-only snapshot. Revert to it offline " |
2219 | "using qemu-img."); | |
f0aa7a8b MDCF |
2220 | return -EINVAL; |
2221 | } | |
2222 | ||
2223 | /* Verify if there is any device that doesn't support snapshots and is | |
2224 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2225 | bs = NULL; |
2226 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2227 | |
07b70bfb | 2228 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2229 | continue; |
2230 | } | |
2231 | ||
2232 | if (!bdrv_can_snapshot(bs)) { | |
2233 | error_report("Device '%s' is writable but does not support snapshots.", | |
2234 | bdrv_get_device_name(bs)); | |
2235 | return -ENOTSUP; | |
2236 | } | |
feeee5ac | 2237 | |
f0aa7a8b MDCF |
2238 | ret = bdrv_snapshot_find(bs, &sn, name); |
2239 | if (ret < 0) { | |
2240 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2241 | bdrv_get_device_name(bs), name); | |
2242 | return ret; | |
2243 | } | |
a672b469 AL |
2244 | } |
2245 | ||
2246 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2247 | bdrv_drain_all(); |
a672b469 | 2248 | |
f0aa7a8b MDCF |
2249 | bs = NULL; |
2250 | while ((bs = bdrv_next(bs))) { | |
2251 | if (bdrv_can_snapshot(bs)) { | |
2252 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2253 | if (ret < 0) { |
f0aa7a8b MDCF |
2254 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2255 | ret, name, bdrv_get_device_name(bs)); | |
2256 | return ret; | |
a672b469 AL |
2257 | } |
2258 | } | |
2259 | } | |
2260 | ||
a672b469 | 2261 | /* restore the VM state */ |
f0aa7a8b | 2262 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2263 | if (!f) { |
1ecda02b | 2264 | error_report("Could not open VM state file"); |
05f2401e | 2265 | return -EINVAL; |
a672b469 | 2266 | } |
f0aa7a8b | 2267 | |
5a8a49d7 | 2268 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2269 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2270 | |
a672b469 AL |
2271 | qemu_fclose(f); |
2272 | if (ret < 0) { | |
1ecda02b | 2273 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2274 | return ret; |
a672b469 | 2275 | } |
f0aa7a8b | 2276 | |
05f2401e | 2277 | return 0; |
7b630349 JQ |
2278 | } |
2279 | ||
d54908a5 | 2280 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2281 | { |
2282 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2283 | int ret; |
d54908a5 | 2284 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2285 | |
f9092b10 | 2286 | bs = bdrv_snapshots(); |
a672b469 | 2287 | if (!bs) { |
376253ec | 2288 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2289 | return; |
2290 | } | |
2291 | ||
dbc13590 MA |
2292 | bs1 = NULL; |
2293 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2294 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2295 | ret = bdrv_snapshot_delete(bs1, name); |
2296 | if (ret < 0) { | |
2297 | if (ret == -ENOTSUP) | |
376253ec AL |
2298 | monitor_printf(mon, |
2299 | "Snapshots not supported on device '%s'\n", | |
2300 | bdrv_get_device_name(bs1)); | |
a672b469 | 2301 | else |
376253ec AL |
2302 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2303 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2304 | } |
2305 | } | |
2306 | } | |
2307 | } | |
2308 | ||
376253ec | 2309 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2310 | { |
2311 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2312 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2313 | int nb_sns, i, ret, available; | |
2314 | int total; | |
2315 | int *available_snapshots; | |
a672b469 AL |
2316 | char buf[256]; |
2317 | ||
f9092b10 | 2318 | bs = bdrv_snapshots(); |
a672b469 | 2319 | if (!bs) { |
376253ec | 2320 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2321 | return; |
2322 | } | |
a672b469 AL |
2323 | |
2324 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2325 | if (nb_sns < 0) { | |
376253ec | 2326 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2327 | return; |
2328 | } | |
f9209915 MDCF |
2329 | |
2330 | if (nb_sns == 0) { | |
2331 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2332 | return; | |
2333 | } | |
2334 | ||
7267c094 | 2335 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2336 | total = 0; |
2337 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2338 | sn = &sn_tab[i]; |
f9209915 MDCF |
2339 | available = 1; |
2340 | bs1 = NULL; | |
2341 | ||
2342 | while ((bs1 = bdrv_next(bs1))) { | |
2343 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2344 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2345 | if (ret < 0) { | |
2346 | available = 0; | |
2347 | break; | |
2348 | } | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | if (available) { | |
2353 | available_snapshots[total] = i; | |
2354 | total++; | |
2355 | } | |
a672b469 | 2356 | } |
f9209915 MDCF |
2357 | |
2358 | if (total > 0) { | |
2359 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2360 | for (i = 0; i < total; i++) { | |
2361 | sn = &sn_tab[available_snapshots[i]]; | |
2362 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2363 | } | |
2364 | } else { | |
2365 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2366 | } | |
2367 | ||
7267c094 AL |
2368 | g_free(sn_tab); |
2369 | g_free(available_snapshots); | |
f9209915 | 2370 | |
a672b469 | 2371 | } |
c5705a77 AK |
2372 | |
2373 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2374 | { | |
1ddde087 | 2375 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2376 | memory_region_name(mr), dev); |
2377 | } | |
2378 | ||
2379 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2380 | { | |
2381 | /* Nothing do to while the implementation is in RAMBlock */ | |
2382 | } | |
2383 | ||
2384 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2385 | { | |
2386 | vmstate_register_ram(mr, NULL); | |
2387 | } |