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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 | * | |
d82ca915 | 462 | */ |
7311bea3 | 463 | static int qemu_fflush(QEMUFile *f) |
a672b469 | 464 | { |
7311bea3 JQ |
465 | int ret = 0; |
466 | ||
a672b469 | 467 | if (!f->put_buffer) |
7311bea3 | 468 | return 0; |
a672b469 AL |
469 | |
470 | if (f->is_write && f->buf_index > 0) { | |
7311bea3 JQ |
471 | ret = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
472 | if (ret >= 0) { | |
a672b469 | 473 | f->buf_offset += f->buf_index; |
7311bea3 | 474 | } |
a672b469 AL |
475 | f->buf_index = 0; |
476 | } | |
7311bea3 | 477 | return ret; |
a672b469 AL |
478 | } |
479 | ||
480 | static void qemu_fill_buffer(QEMUFile *f) | |
481 | { | |
482 | int len; | |
0046c45b | 483 | int pending; |
a672b469 AL |
484 | |
485 | if (!f->get_buffer) | |
486 | return; | |
487 | ||
488 | if (f->is_write) | |
489 | abort(); | |
490 | ||
0046c45b JQ |
491 | pending = f->buf_size - f->buf_index; |
492 | if (pending > 0) { | |
493 | memmove(f->buf, f->buf + f->buf_index, pending); | |
494 | } | |
495 | f->buf_index = 0; | |
496 | f->buf_size = pending; | |
497 | ||
498 | len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, | |
499 | IO_BUF_SIZE - pending); | |
a672b469 | 500 | if (len > 0) { |
0046c45b | 501 | f->buf_size += len; |
a672b469 | 502 | f->buf_offset += len; |
fa39a30f JQ |
503 | } else if (len == 0) { |
504 | f->last_error = -EIO; | |
a672b469 | 505 | } else if (len != -EAGAIN) |
c29110d5 | 506 | qemu_file_set_error(f, len); |
a672b469 AL |
507 | } |
508 | ||
d82ca915 EH |
509 | /** Calls close function and set last_error if needed |
510 | * | |
511 | * Internal function. qemu_fflush() must be called before this. | |
512 | * | |
513 | * Returns f->close() return value, or 0 if close function is not set. | |
514 | */ | |
2e1e79da | 515 | static int qemu_fclose_internal(QEMUFile *f) |
a672b469 AL |
516 | { |
517 | int ret = 0; | |
d82ca915 | 518 | if (f->close) { |
a672b469 | 519 | ret = f->close(f->opaque); |
d82ca915 EH |
520 | qemu_file_set_if_error(f, ret); |
521 | } | |
522 | return ret; | |
523 | } | |
524 | ||
525 | /** Closes the file | |
526 | * | |
527 | * Returns negative error value if any error happened on previous operations or | |
528 | * while closing the file. Returns 0 or positive number on success. | |
529 | * | |
530 | * The meaning of return value on success depends on the specific backend | |
531 | * being used. | |
532 | */ | |
533 | int qemu_fclose(QEMUFile *f) | |
534 | { | |
7311bea3 JQ |
535 | int ret, ret2; |
536 | ret = qemu_fflush(f); | |
537 | ret2 = qemu_fclose_internal(f); | |
538 | ||
539 | if (ret >= 0) { | |
540 | ret = ret2; | |
541 | } | |
d82ca915 EH |
542 | /* If any error was spotted before closing, we should report it |
543 | * instead of the close() return value. | |
544 | */ | |
545 | if (f->last_error) { | |
546 | ret = f->last_error; | |
547 | } | |
7267c094 | 548 | g_free(f); |
a672b469 AL |
549 | return ret; |
550 | } | |
551 | ||
552 | void qemu_file_put_notify(QEMUFile *f) | |
553 | { | |
554 | f->put_buffer(f->opaque, NULL, 0, 0); | |
555 | } | |
556 | ||
557 | void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) | |
558 | { | |
559 | int l; | |
560 | ||
3961b4dd | 561 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
562 | fprintf(stderr, |
563 | "Attempted to write to buffer while read buffer is not empty\n"); | |
564 | abort(); | |
565 | } | |
566 | ||
3961b4dd | 567 | while (!f->last_error && size > 0) { |
a672b469 AL |
568 | l = IO_BUF_SIZE - f->buf_index; |
569 | if (l > size) | |
570 | l = size; | |
571 | memcpy(f->buf + f->buf_index, buf, l); | |
572 | f->is_write = 1; | |
573 | f->buf_index += l; | |
574 | buf += l; | |
575 | size -= l; | |
7311bea3 JQ |
576 | if (f->buf_index >= IO_BUF_SIZE) { |
577 | int ret = qemu_fflush(f); | |
578 | qemu_file_set_if_error(f, ret); | |
579 | } | |
a672b469 AL |
580 | } |
581 | } | |
582 | ||
583 | void qemu_put_byte(QEMUFile *f, int v) | |
584 | { | |
3961b4dd | 585 | if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
a672b469 AL |
586 | fprintf(stderr, |
587 | "Attempted to write to buffer while read buffer is not empty\n"); | |
588 | abort(); | |
589 | } | |
590 | ||
591 | f->buf[f->buf_index++] = v; | |
592 | f->is_write = 1; | |
7311bea3 JQ |
593 | if (f->buf_index >= IO_BUF_SIZE) { |
594 | int ret = qemu_fflush(f); | |
595 | qemu_file_set_if_error(f, ret); | |
596 | } | |
a672b469 AL |
597 | } |
598 | ||
c6380724 | 599 | static void qemu_file_skip(QEMUFile *f, int size) |
a672b469 | 600 | { |
c6380724 JQ |
601 | if (f->buf_index + size <= f->buf_size) { |
602 | f->buf_index += size; | |
603 | } | |
604 | } | |
605 | ||
606 | static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) | |
a672b469 | 607 | { |
c6380724 JQ |
608 | int pending; |
609 | int index; | |
a672b469 | 610 | |
b9ce1454 | 611 | if (f->is_write) { |
a672b469 | 612 | abort(); |
b9ce1454 | 613 | } |
a672b469 | 614 | |
c6380724 JQ |
615 | index = f->buf_index + offset; |
616 | pending = f->buf_size - index; | |
617 | if (pending < size) { | |
618 | qemu_fill_buffer(f); | |
619 | index = f->buf_index + offset; | |
620 | pending = f->buf_size - index; | |
621 | } | |
622 | ||
623 | if (pending <= 0) { | |
624 | return 0; | |
625 | } | |
626 | if (size > pending) { | |
627 | size = pending; | |
628 | } | |
629 | ||
630 | memcpy(buf, f->buf + index, size); | |
631 | return size; | |
632 | } | |
633 | ||
634 | int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) | |
635 | { | |
636 | int pending = size; | |
637 | int done = 0; | |
638 | ||
639 | while (pending > 0) { | |
640 | int res; | |
641 | ||
642 | res = qemu_peek_buffer(f, buf, pending, 0); | |
643 | if (res == 0) { | |
644 | return done; | |
a672b469 | 645 | } |
c6380724 JQ |
646 | qemu_file_skip(f, res); |
647 | buf += res; | |
648 | pending -= res; | |
649 | done += res; | |
a672b469 | 650 | } |
c6380724 | 651 | return done; |
a672b469 AL |
652 | } |
653 | ||
c6380724 | 654 | static int qemu_peek_byte(QEMUFile *f, int offset) |
811814bd | 655 | { |
c6380724 JQ |
656 | int index = f->buf_index + offset; |
657 | ||
b9ce1454 | 658 | if (f->is_write) { |
811814bd | 659 | abort(); |
b9ce1454 | 660 | } |
811814bd | 661 | |
c6380724 | 662 | if (index >= f->buf_size) { |
811814bd | 663 | qemu_fill_buffer(f); |
c6380724 JQ |
664 | index = f->buf_index + offset; |
665 | if (index >= f->buf_size) { | |
811814bd | 666 | return 0; |
b9ce1454 | 667 | } |
811814bd | 668 | } |
c6380724 | 669 | return f->buf[index]; |
811814bd JQ |
670 | } |
671 | ||
a672b469 AL |
672 | int qemu_get_byte(QEMUFile *f) |
673 | { | |
65f3bb3d | 674 | int result; |
a672b469 | 675 | |
c6380724 JQ |
676 | result = qemu_peek_byte(f, 0); |
677 | qemu_file_skip(f, 1); | |
65f3bb3d | 678 | return result; |
a672b469 AL |
679 | } |
680 | ||
681 | int64_t qemu_ftell(QEMUFile *f) | |
682 | { | |
683 | return f->buf_offset - f->buf_size + f->buf_index; | |
684 | } | |
685 | ||
a672b469 AL |
686 | int qemu_file_rate_limit(QEMUFile *f) |
687 | { | |
688 | if (f->rate_limit) | |
689 | return f->rate_limit(f->opaque); | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
3d002df3 | 694 | int64_t qemu_file_get_rate_limit(QEMUFile *f) |
c163b5ca LS |
695 | { |
696 | if (f->get_rate_limit) | |
697 | return f->get_rate_limit(f->opaque); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
3d002df3 | 702 | int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
19629537 | 703 | { |
0bb05eaf GC |
704 | /* any failed or completed migration keeps its state to allow probing of |
705 | * migration data, but has no associated file anymore */ | |
706 | if (f && f->set_rate_limit) | |
19629537 GC |
707 | return f->set_rate_limit(f->opaque, new_rate); |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
a672b469 AL |
712 | void qemu_put_be16(QEMUFile *f, unsigned int v) |
713 | { | |
714 | qemu_put_byte(f, v >> 8); | |
715 | qemu_put_byte(f, v); | |
716 | } | |
717 | ||
718 | void qemu_put_be32(QEMUFile *f, unsigned int v) | |
719 | { | |
720 | qemu_put_byte(f, v >> 24); | |
721 | qemu_put_byte(f, v >> 16); | |
722 | qemu_put_byte(f, v >> 8); | |
723 | qemu_put_byte(f, v); | |
724 | } | |
725 | ||
726 | void qemu_put_be64(QEMUFile *f, uint64_t v) | |
727 | { | |
728 | qemu_put_be32(f, v >> 32); | |
729 | qemu_put_be32(f, v); | |
730 | } | |
731 | ||
732 | unsigned int qemu_get_be16(QEMUFile *f) | |
733 | { | |
734 | unsigned int v; | |
735 | v = qemu_get_byte(f) << 8; | |
736 | v |= qemu_get_byte(f); | |
737 | return v; | |
738 | } | |
739 | ||
740 | unsigned int qemu_get_be32(QEMUFile *f) | |
741 | { | |
742 | unsigned int v; | |
743 | v = qemu_get_byte(f) << 24; | |
744 | v |= qemu_get_byte(f) << 16; | |
745 | v |= qemu_get_byte(f) << 8; | |
746 | v |= qemu_get_byte(f); | |
747 | return v; | |
748 | } | |
749 | ||
750 | uint64_t qemu_get_be64(QEMUFile *f) | |
751 | { | |
752 | uint64_t v; | |
753 | v = (uint64_t)qemu_get_be32(f) << 32; | |
754 | v |= qemu_get_be32(f); | |
755 | return v; | |
756 | } | |
757 | ||
2ff68d07 PB |
758 | |
759 | /* timer */ | |
760 | ||
761 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) | |
762 | { | |
763 | uint64_t expire_time; | |
764 | ||
765 | expire_time = qemu_timer_expire_time_ns(ts); | |
766 | qemu_put_be64(f, expire_time); | |
767 | } | |
768 | ||
769 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) | |
770 | { | |
771 | uint64_t expire_time; | |
772 | ||
773 | expire_time = qemu_get_be64(f); | |
774 | if (expire_time != -1) { | |
775 | qemu_mod_timer_ns(ts, expire_time); | |
776 | } else { | |
777 | qemu_del_timer(ts); | |
778 | } | |
779 | } | |
780 | ||
781 | ||
cdae5cfb GH |
782 | /* bool */ |
783 | ||
784 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
785 | { | |
786 | bool *v = pv; | |
787 | *v = qemu_get_byte(f); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
792 | { | |
793 | bool *v = pv; | |
794 | qemu_put_byte(f, *v); | |
795 | } | |
796 | ||
797 | const VMStateInfo vmstate_info_bool = { | |
798 | .name = "bool", | |
799 | .get = get_bool, | |
800 | .put = put_bool, | |
801 | }; | |
802 | ||
9ed7d6ae JQ |
803 | /* 8 bit int */ |
804 | ||
805 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
806 | { | |
807 | int8_t *v = pv; | |
808 | qemu_get_s8s(f, v); | |
809 | return 0; | |
810 | } | |
811 | ||
84e2e3eb | 812 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 813 | { |
84e2e3eb | 814 | int8_t *v = pv; |
9ed7d6ae JQ |
815 | qemu_put_s8s(f, v); |
816 | } | |
817 | ||
818 | const VMStateInfo vmstate_info_int8 = { | |
819 | .name = "int8", | |
820 | .get = get_int8, | |
821 | .put = put_int8, | |
822 | }; | |
823 | ||
824 | /* 16 bit int */ | |
825 | ||
826 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
827 | { | |
828 | int16_t *v = pv; | |
829 | qemu_get_sbe16s(f, v); | |
830 | return 0; | |
831 | } | |
832 | ||
84e2e3eb | 833 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 834 | { |
84e2e3eb | 835 | int16_t *v = pv; |
9ed7d6ae JQ |
836 | qemu_put_sbe16s(f, v); |
837 | } | |
838 | ||
839 | const VMStateInfo vmstate_info_int16 = { | |
840 | .name = "int16", | |
841 | .get = get_int16, | |
842 | .put = put_int16, | |
843 | }; | |
844 | ||
845 | /* 32 bit int */ | |
846 | ||
847 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
848 | { | |
849 | int32_t *v = pv; | |
850 | qemu_get_sbe32s(f, v); | |
851 | return 0; | |
852 | } | |
853 | ||
84e2e3eb | 854 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 855 | { |
84e2e3eb | 856 | int32_t *v = pv; |
9ed7d6ae JQ |
857 | qemu_put_sbe32s(f, v); |
858 | } | |
859 | ||
860 | const VMStateInfo vmstate_info_int32 = { | |
861 | .name = "int32", | |
862 | .get = get_int32, | |
863 | .put = put_int32, | |
864 | }; | |
865 | ||
82501660 JQ |
866 | /* 32 bit int. See that the received value is the same than the one |
867 | in the field */ | |
868 | ||
869 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
870 | { | |
871 | int32_t *v = pv; | |
872 | int32_t v2; | |
873 | qemu_get_sbe32s(f, &v2); | |
874 | ||
875 | if (*v == v2) | |
876 | return 0; | |
877 | return -EINVAL; | |
878 | } | |
879 | ||
880 | const VMStateInfo vmstate_info_int32_equal = { | |
881 | .name = "int32 equal", | |
882 | .get = get_int32_equal, | |
883 | .put = put_int32, | |
884 | }; | |
885 | ||
0a031e0a JQ |
886 | /* 32 bit int. See that the received value is the less or the same |
887 | than the one in the field */ | |
888 | ||
889 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
890 | { | |
891 | int32_t *old = pv; | |
892 | int32_t new; | |
893 | qemu_get_sbe32s(f, &new); | |
894 | ||
895 | if (*old <= new) | |
896 | return 0; | |
897 | return -EINVAL; | |
898 | } | |
899 | ||
900 | const VMStateInfo vmstate_info_int32_le = { | |
901 | .name = "int32 equal", | |
902 | .get = get_int32_le, | |
903 | .put = put_int32, | |
904 | }; | |
905 | ||
9ed7d6ae JQ |
906 | /* 64 bit int */ |
907 | ||
908 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
909 | { | |
910 | int64_t *v = pv; | |
911 | qemu_get_sbe64s(f, v); | |
912 | return 0; | |
913 | } | |
914 | ||
84e2e3eb | 915 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 916 | { |
84e2e3eb | 917 | int64_t *v = pv; |
9ed7d6ae JQ |
918 | qemu_put_sbe64s(f, v); |
919 | } | |
920 | ||
921 | const VMStateInfo vmstate_info_int64 = { | |
922 | .name = "int64", | |
923 | .get = get_int64, | |
924 | .put = put_int64, | |
925 | }; | |
926 | ||
927 | /* 8 bit unsigned int */ | |
928 | ||
929 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
930 | { | |
931 | uint8_t *v = pv; | |
932 | qemu_get_8s(f, v); | |
933 | return 0; | |
934 | } | |
935 | ||
84e2e3eb | 936 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 937 | { |
84e2e3eb | 938 | uint8_t *v = pv; |
9ed7d6ae JQ |
939 | qemu_put_8s(f, v); |
940 | } | |
941 | ||
942 | const VMStateInfo vmstate_info_uint8 = { | |
943 | .name = "uint8", | |
944 | .get = get_uint8, | |
945 | .put = put_uint8, | |
946 | }; | |
947 | ||
948 | /* 16 bit unsigned int */ | |
949 | ||
950 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
951 | { | |
952 | uint16_t *v = pv; | |
953 | qemu_get_be16s(f, v); | |
954 | return 0; | |
955 | } | |
956 | ||
84e2e3eb | 957 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 958 | { |
84e2e3eb | 959 | uint16_t *v = pv; |
9ed7d6ae JQ |
960 | qemu_put_be16s(f, v); |
961 | } | |
962 | ||
963 | const VMStateInfo vmstate_info_uint16 = { | |
964 | .name = "uint16", | |
965 | .get = get_uint16, | |
966 | .put = put_uint16, | |
967 | }; | |
968 | ||
969 | /* 32 bit unsigned int */ | |
970 | ||
971 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
972 | { | |
973 | uint32_t *v = pv; | |
974 | qemu_get_be32s(f, v); | |
975 | return 0; | |
976 | } | |
977 | ||
84e2e3eb | 978 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 979 | { |
84e2e3eb | 980 | uint32_t *v = pv; |
9ed7d6ae JQ |
981 | qemu_put_be32s(f, v); |
982 | } | |
983 | ||
984 | const VMStateInfo vmstate_info_uint32 = { | |
985 | .name = "uint32", | |
986 | .get = get_uint32, | |
987 | .put = put_uint32, | |
988 | }; | |
989 | ||
9122a8fe JQ |
990 | /* 32 bit uint. See that the received value is the same than the one |
991 | in the field */ | |
992 | ||
993 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
994 | { | |
995 | uint32_t *v = pv; | |
996 | uint32_t v2; | |
997 | qemu_get_be32s(f, &v2); | |
998 | ||
999 | if (*v == v2) { | |
1000 | return 0; | |
1001 | } | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | ||
1005 | const VMStateInfo vmstate_info_uint32_equal = { | |
1006 | .name = "uint32 equal", | |
1007 | .get = get_uint32_equal, | |
1008 | .put = put_uint32, | |
1009 | }; | |
1010 | ||
9ed7d6ae JQ |
1011 | /* 64 bit unsigned int */ |
1012 | ||
1013 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
1014 | { | |
1015 | uint64_t *v = pv; | |
1016 | qemu_get_be64s(f, v); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
84e2e3eb | 1020 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
9ed7d6ae | 1021 | { |
84e2e3eb | 1022 | uint64_t *v = pv; |
9ed7d6ae JQ |
1023 | qemu_put_be64s(f, v); |
1024 | } | |
1025 | ||
1026 | const VMStateInfo vmstate_info_uint64 = { | |
1027 | .name = "uint64", | |
1028 | .get = get_uint64, | |
1029 | .put = put_uint64, | |
1030 | }; | |
1031 | ||
80cd83e7 JQ |
1032 | /* 8 bit int. See that the received value is the same than the one |
1033 | in the field */ | |
1034 | ||
1035 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
1036 | { | |
1037 | uint8_t *v = pv; | |
1038 | uint8_t v2; | |
1039 | qemu_get_8s(f, &v2); | |
1040 | ||
1041 | if (*v == v2) | |
1042 | return 0; | |
1043 | return -EINVAL; | |
1044 | } | |
1045 | ||
1046 | const VMStateInfo vmstate_info_uint8_equal = { | |
aa1cce69 | 1047 | .name = "uint8 equal", |
80cd83e7 JQ |
1048 | .get = get_uint8_equal, |
1049 | .put = put_uint8, | |
1050 | }; | |
1051 | ||
dc3b83a0 JQ |
1052 | /* 16 bit unsigned int int. See that the received value is the same than the one |
1053 | in the field */ | |
1054 | ||
1055 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
1056 | { | |
1057 | uint16_t *v = pv; | |
1058 | uint16_t v2; | |
1059 | qemu_get_be16s(f, &v2); | |
1060 | ||
1061 | if (*v == v2) | |
1062 | return 0; | |
1063 | return -EINVAL; | |
1064 | } | |
1065 | ||
1066 | const VMStateInfo vmstate_info_uint16_equal = { | |
1067 | .name = "uint16 equal", | |
1068 | .get = get_uint16_equal, | |
1069 | .put = put_uint16, | |
1070 | }; | |
1071 | ||
dde0463b JQ |
1072 | /* timers */ |
1073 | ||
1074 | static int get_timer(QEMUFile *f, void *pv, size_t size) | |
1075 | { | |
1076 | QEMUTimer *v = pv; | |
1077 | qemu_get_timer(f, v); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
84e2e3eb | 1081 | static void put_timer(QEMUFile *f, void *pv, size_t size) |
dde0463b | 1082 | { |
84e2e3eb | 1083 | QEMUTimer *v = pv; |
dde0463b JQ |
1084 | qemu_put_timer(f, v); |
1085 | } | |
1086 | ||
1087 | const VMStateInfo vmstate_info_timer = { | |
1088 | .name = "timer", | |
1089 | .get = get_timer, | |
1090 | .put = put_timer, | |
1091 | }; | |
1092 | ||
6f67c50f JQ |
1093 | /* uint8_t buffers */ |
1094 | ||
1095 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
1096 | { | |
1097 | uint8_t *v = pv; | |
1098 | qemu_get_buffer(f, v, size); | |
1099 | return 0; | |
1100 | } | |
1101 | ||
84e2e3eb | 1102 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
6f67c50f | 1103 | { |
84e2e3eb | 1104 | uint8_t *v = pv; |
6f67c50f JQ |
1105 | qemu_put_buffer(f, v, size); |
1106 | } | |
1107 | ||
1108 | const VMStateInfo vmstate_info_buffer = { | |
1109 | .name = "buffer", | |
1110 | .get = get_buffer, | |
1111 | .put = put_buffer, | |
1112 | }; | |
1113 | ||
76507c75 | 1114 | /* unused buffers: space that was used for some fields that are |
61cc8701 | 1115 | not useful anymore */ |
76507c75 JQ |
1116 | |
1117 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1118 | { | |
21174c34 JK |
1119 | uint8_t buf[1024]; |
1120 | int block_len; | |
1121 | ||
1122 | while (size > 0) { | |
1123 | block_len = MIN(sizeof(buf), size); | |
1124 | size -= block_len; | |
1125 | qemu_get_buffer(f, buf, block_len); | |
1126 | } | |
1127 | return 0; | |
76507c75 JQ |
1128 | } |
1129 | ||
1130 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
1131 | { | |
21174c34 JK |
1132 | static const uint8_t buf[1024]; |
1133 | int block_len; | |
1134 | ||
1135 | while (size > 0) { | |
1136 | block_len = MIN(sizeof(buf), size); | |
1137 | size -= block_len; | |
1138 | qemu_put_buffer(f, buf, block_len); | |
1139 | } | |
76507c75 JQ |
1140 | } |
1141 | ||
1142 | const VMStateInfo vmstate_info_unused_buffer = { | |
1143 | .name = "unused_buffer", | |
1144 | .get = get_unused_buffer, | |
1145 | .put = put_unused_buffer, | |
1146 | }; | |
1147 | ||
7685ee6a AW |
1148 | typedef struct CompatEntry { |
1149 | char idstr[256]; | |
1150 | int instance_id; | |
1151 | } CompatEntry; | |
1152 | ||
a672b469 | 1153 | typedef struct SaveStateEntry { |
72cf2d4f | 1154 | QTAILQ_ENTRY(SaveStateEntry) entry; |
a672b469 AL |
1155 | char idstr[256]; |
1156 | int instance_id; | |
4d2ffa08 | 1157 | int alias_id; |
a672b469 AL |
1158 | int version_id; |
1159 | int section_id; | |
22ea40f4 | 1160 | SaveVMHandlers *ops; |
9ed7d6ae | 1161 | const VMStateDescription *vmsd; |
a672b469 | 1162 | void *opaque; |
7685ee6a | 1163 | CompatEntry *compat; |
24312968 | 1164 | int no_migrate; |
a7ae8355 | 1165 | int is_ram; |
a672b469 AL |
1166 | } SaveStateEntry; |
1167 | ||
c163b5ca | 1168 | |
72cf2d4f BS |
1169 | static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
1170 | QTAILQ_HEAD_INITIALIZER(savevm_handlers); | |
9ed7d6ae | 1171 | static int global_section_id; |
a672b469 | 1172 | |
8718e999 JQ |
1173 | static int calculate_new_instance_id(const char *idstr) |
1174 | { | |
1175 | SaveStateEntry *se; | |
1176 | int instance_id = 0; | |
1177 | ||
72cf2d4f | 1178 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
8718e999 JQ |
1179 | if (strcmp(idstr, se->idstr) == 0 |
1180 | && instance_id <= se->instance_id) { | |
1181 | instance_id = se->instance_id + 1; | |
1182 | } | |
1183 | } | |
1184 | return instance_id; | |
1185 | } | |
1186 | ||
7685ee6a AW |
1187 | static int calculate_compat_instance_id(const char *idstr) |
1188 | { | |
1189 | SaveStateEntry *se; | |
1190 | int instance_id = 0; | |
1191 | ||
1192 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1193 | if (!se->compat) | |
1194 | continue; | |
1195 | ||
1196 | if (strcmp(idstr, se->compat->idstr) == 0 | |
1197 | && instance_id <= se->compat->instance_id) { | |
1198 | instance_id = se->compat->instance_id + 1; | |
1199 | } | |
1200 | } | |
1201 | return instance_id; | |
1202 | } | |
1203 | ||
a672b469 AL |
1204 | /* TODO: Individual devices generally have very little idea about the rest |
1205 | of the system, so instance_id should be removed/replaced. | |
1206 | Meanwhile pass -1 as instance_id if you do not already have a clearly | |
1207 | distinguishing id for all instances of your device class. */ | |
0be71e32 AW |
1208 | int register_savevm_live(DeviceState *dev, |
1209 | const char *idstr, | |
a672b469 AL |
1210 | int instance_id, |
1211 | int version_id, | |
7908c78d | 1212 | SaveVMHandlers *ops, |
a672b469 AL |
1213 | void *opaque) |
1214 | { | |
8718e999 | 1215 | SaveStateEntry *se; |
a672b469 | 1216 | |
7267c094 | 1217 | se = g_malloc0(sizeof(SaveStateEntry)); |
a672b469 AL |
1218 | se->version_id = version_id; |
1219 | se->section_id = global_section_id++; | |
7908c78d | 1220 | se->ops = ops; |
a672b469 | 1221 | se->opaque = opaque; |
9ed7d6ae | 1222 | se->vmsd = NULL; |
24312968 | 1223 | se->no_migrate = 0; |
a7ae8355 | 1224 | /* if this is a live_savem then set is_ram */ |
16310a3c | 1225 | if (ops->save_live_setup != NULL) { |
a7ae8355 SS |
1226 | se->is_ram = 1; |
1227 | } | |
a672b469 | 1228 | |
09e5ab63 AL |
1229 | if (dev) { |
1230 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1231 | if (id) { |
1232 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1233 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1234 | g_free(id); |
7685ee6a | 1235 | |
7267c094 | 1236 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1237 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
1238 | se->compat->instance_id = instance_id == -1 ? | |
1239 | calculate_compat_instance_id(idstr) : instance_id; | |
1240 | instance_id = -1; | |
1241 | } | |
1242 | } | |
1243 | pstrcat(se->idstr, sizeof(se->idstr), idstr); | |
1244 | ||
8718e999 | 1245 | if (instance_id == -1) { |
7685ee6a | 1246 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1247 | } else { |
1248 | se->instance_id = instance_id; | |
a672b469 | 1249 | } |
7685ee6a | 1250 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1251 | /* add at the end of list */ |
72cf2d4f | 1252 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
a672b469 AL |
1253 | return 0; |
1254 | } | |
1255 | ||
0be71e32 AW |
1256 | int register_savevm(DeviceState *dev, |
1257 | const char *idstr, | |
a672b469 AL |
1258 | int instance_id, |
1259 | int version_id, | |
1260 | SaveStateHandler *save_state, | |
1261 | LoadStateHandler *load_state, | |
1262 | void *opaque) | |
1263 | { | |
7908c78d JQ |
1264 | SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers)); |
1265 | ops->save_state = save_state; | |
1266 | ops->load_state = load_state; | |
0be71e32 | 1267 | return register_savevm_live(dev, idstr, instance_id, version_id, |
7908c78d | 1268 | ops, opaque); |
a672b469 AL |
1269 | } |
1270 | ||
0be71e32 | 1271 | void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
41bd13af | 1272 | { |
8718e999 | 1273 | SaveStateEntry *se, *new_se; |
7685ee6a AW |
1274 | char id[256] = ""; |
1275 | ||
09e5ab63 AL |
1276 | if (dev) { |
1277 | char *path = qdev_get_dev_path(dev); | |
7685ee6a AW |
1278 | if (path) { |
1279 | pstrcpy(id, sizeof(id), path); | |
1280 | pstrcat(id, sizeof(id), "/"); | |
7267c094 | 1281 | g_free(path); |
7685ee6a AW |
1282 | } |
1283 | } | |
1284 | pstrcat(id, sizeof(id), idstr); | |
41bd13af | 1285 | |
72cf2d4f | 1286 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
7685ee6a | 1287 | if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
72cf2d4f | 1288 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1289 | if (se->compat) { |
7267c094 | 1290 | g_free(se->compat); |
69e58af9 | 1291 | } |
22ea40f4 | 1292 | g_free(se->ops); |
7267c094 | 1293 | g_free(se); |
41bd13af | 1294 | } |
41bd13af AL |
1295 | } |
1296 | } | |
1297 | ||
0be71e32 | 1298 | int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
4d2ffa08 JK |
1299 | const VMStateDescription *vmsd, |
1300 | void *opaque, int alias_id, | |
1301 | int required_for_version) | |
9ed7d6ae | 1302 | { |
8718e999 | 1303 | SaveStateEntry *se; |
9ed7d6ae | 1304 | |
4d2ffa08 JK |
1305 | /* If this triggers, alias support can be dropped for the vmsd. */ |
1306 | assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); | |
1307 | ||
7267c094 | 1308 | se = g_malloc0(sizeof(SaveStateEntry)); |
9ed7d6ae JQ |
1309 | se->version_id = vmsd->version_id; |
1310 | se->section_id = global_section_id++; | |
9ed7d6ae JQ |
1311 | se->opaque = opaque; |
1312 | se->vmsd = vmsd; | |
4d2ffa08 | 1313 | se->alias_id = alias_id; |
2837c8ea | 1314 | se->no_migrate = vmsd->unmigratable; |
9ed7d6ae | 1315 | |
09e5ab63 AL |
1316 | if (dev) { |
1317 | char *id = qdev_get_dev_path(dev); | |
7685ee6a AW |
1318 | if (id) { |
1319 | pstrcpy(se->idstr, sizeof(se->idstr), id); | |
1320 | pstrcat(se->idstr, sizeof(se->idstr), "/"); | |
7267c094 | 1321 | g_free(id); |
7685ee6a | 1322 | |
7267c094 | 1323 | se->compat = g_malloc0(sizeof(CompatEntry)); |
7685ee6a AW |
1324 | pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
1325 | se->compat->instance_id = instance_id == -1 ? | |
1326 | calculate_compat_instance_id(vmsd->name) : instance_id; | |
1327 | instance_id = -1; | |
1328 | } | |
1329 | } | |
1330 | pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); | |
1331 | ||
8718e999 | 1332 | if (instance_id == -1) { |
7685ee6a | 1333 | se->instance_id = calculate_new_instance_id(se->idstr); |
8718e999 JQ |
1334 | } else { |
1335 | se->instance_id = instance_id; | |
9ed7d6ae | 1336 | } |
7685ee6a | 1337 | assert(!se->compat || se->instance_id == 0); |
8718e999 | 1338 | /* add at the end of list */ |
72cf2d4f | 1339 | QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
9ed7d6ae JQ |
1340 | return 0; |
1341 | } | |
1342 | ||
0be71e32 AW |
1343 | int vmstate_register(DeviceState *dev, int instance_id, |
1344 | const VMStateDescription *vmsd, void *opaque) | |
4d2ffa08 | 1345 | { |
0be71e32 AW |
1346 | return vmstate_register_with_alias_id(dev, instance_id, vmsd, |
1347 | opaque, -1, 0); | |
4d2ffa08 JK |
1348 | } |
1349 | ||
0be71e32 AW |
1350 | void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1351 | void *opaque) | |
9ed7d6ae | 1352 | { |
1eb7538b JQ |
1353 | SaveStateEntry *se, *new_se; |
1354 | ||
72cf2d4f | 1355 | QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1eb7538b | 1356 | if (se->vmsd == vmsd && se->opaque == opaque) { |
72cf2d4f | 1357 | QTAILQ_REMOVE(&savevm_handlers, se, entry); |
69e58af9 | 1358 | if (se->compat) { |
7267c094 | 1359 | g_free(se->compat); |
69e58af9 | 1360 | } |
7267c094 | 1361 | g_free(se); |
1eb7538b JQ |
1362 | } |
1363 | } | |
9ed7d6ae JQ |
1364 | } |
1365 | ||
811814bd JQ |
1366 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1367 | void *opaque); | |
1368 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1369 | void *opaque); | |
1370 | ||
9ed7d6ae JQ |
1371 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1372 | void *opaque, int version_id) | |
1373 | { | |
1374 | VMStateField *field = vmsd->fields; | |
811814bd | 1375 | int ret; |
9ed7d6ae JQ |
1376 | |
1377 | if (version_id > vmsd->version_id) { | |
1378 | return -EINVAL; | |
1379 | } | |
1380 | if (version_id < vmsd->minimum_version_id_old) { | |
1381 | return -EINVAL; | |
1382 | } | |
1383 | if (version_id < vmsd->minimum_version_id) { | |
1384 | return vmsd->load_state_old(f, opaque, version_id); | |
1385 | } | |
fd4d52de JQ |
1386 | if (vmsd->pre_load) { |
1387 | int ret = vmsd->pre_load(opaque); | |
1388 | if (ret) | |
1389 | return ret; | |
1390 | } | |
9ed7d6ae | 1391 | while(field->name) { |
f11f6a5f JQ |
1392 | if ((field->field_exists && |
1393 | field->field_exists(opaque, version_id)) || | |
1394 | (!field->field_exists && | |
1395 | field->version_id <= version_id)) { | |
f752a6aa | 1396 | void *base_addr = opaque + field->offset; |
811814bd | 1397 | int i, n_elems = 1; |
e61a1e0a | 1398 | int size = field->size; |
9ed7d6ae | 1399 | |
e61a1e0a JQ |
1400 | if (field->flags & VMS_VBUFFER) { |
1401 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1402 | if (field->flags & VMS_MULTIPLY) { |
1403 | size *= field->size; | |
1404 | } | |
e61a1e0a | 1405 | } |
f752a6aa JQ |
1406 | if (field->flags & VMS_ARRAY) { |
1407 | n_elems = field->num; | |
d6698281 JQ |
1408 | } else if (field->flags & VMS_VARRAY_INT32) { |
1409 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
a624b086 JQ |
1410 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1411 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1412 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1413 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
82fa39b7 JQ |
1414 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1415 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f752a6aa | 1416 | } |
dde0463b | 1417 | if (field->flags & VMS_POINTER) { |
e61a1e0a | 1418 | base_addr = *(void **)base_addr + field->start; |
dde0463b | 1419 | } |
f752a6aa | 1420 | for (i = 0; i < n_elems; i++) { |
e61a1e0a | 1421 | void *addr = base_addr + size * i; |
ec245e21 | 1422 | |
19df438b JQ |
1423 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1424 | addr = *(void **)addr; | |
1425 | } | |
ec245e21 | 1426 | if (field->flags & VMS_STRUCT) { |
fa3aad24 | 1427 | ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
ec245e21 | 1428 | } else { |
e61a1e0a | 1429 | ret = field->info->get(f, addr, size); |
ec245e21 JQ |
1430 | |
1431 | } | |
f752a6aa JQ |
1432 | if (ret < 0) { |
1433 | return ret; | |
1434 | } | |
9ed7d6ae JQ |
1435 | } |
1436 | } | |
1437 | field++; | |
1438 | } | |
811814bd JQ |
1439 | ret = vmstate_subsection_load(f, vmsd, opaque); |
1440 | if (ret != 0) { | |
1441 | return ret; | |
1442 | } | |
752ff2fa | 1443 | if (vmsd->post_load) { |
e59fb374 | 1444 | return vmsd->post_load(opaque, version_id); |
752ff2fa | 1445 | } |
9ed7d6ae JQ |
1446 | return 0; |
1447 | } | |
1448 | ||
1449 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
84e2e3eb | 1450 | void *opaque) |
9ed7d6ae JQ |
1451 | { |
1452 | VMStateField *field = vmsd->fields; | |
1453 | ||
8fb0791d JQ |
1454 | if (vmsd->pre_save) { |
1455 | vmsd->pre_save(opaque); | |
1456 | } | |
9ed7d6ae | 1457 | while(field->name) { |
f11f6a5f JQ |
1458 | if (!field->field_exists || |
1459 | field->field_exists(opaque, vmsd->version_id)) { | |
1460 | void *base_addr = opaque + field->offset; | |
1461 | int i, n_elems = 1; | |
e61a1e0a | 1462 | int size = field->size; |
dde0463b | 1463 | |
e61a1e0a JQ |
1464 | if (field->flags & VMS_VBUFFER) { |
1465 | size = *(int32_t *)(opaque+field->size_offset); | |
33599e2a JQ |
1466 | if (field->flags & VMS_MULTIPLY) { |
1467 | size *= field->size; | |
1468 | } | |
e61a1e0a | 1469 | } |
f11f6a5f JQ |
1470 | if (field->flags & VMS_ARRAY) { |
1471 | n_elems = field->num; | |
d6698281 JQ |
1472 | } else if (field->flags & VMS_VARRAY_INT32) { |
1473 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
1329d189 AK |
1474 | } else if (field->flags & VMS_VARRAY_UINT32) { |
1475 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
bdb4941d JQ |
1476 | } else if (field->flags & VMS_VARRAY_UINT16) { |
1477 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
b784421c JQ |
1478 | } else if (field->flags & VMS_VARRAY_UINT8) { |
1479 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
f11f6a5f JQ |
1480 | } |
1481 | if (field->flags & VMS_POINTER) { | |
e61a1e0a | 1482 | base_addr = *(void **)base_addr + field->start; |
f11f6a5f JQ |
1483 | } |
1484 | for (i = 0; i < n_elems; i++) { | |
e61a1e0a | 1485 | void *addr = base_addr + size * i; |
ec245e21 | 1486 | |
8595387e JQ |
1487 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
1488 | addr = *(void **)addr; | |
1489 | } | |
f11f6a5f JQ |
1490 | if (field->flags & VMS_STRUCT) { |
1491 | vmstate_save_state(f, field->vmsd, addr); | |
1492 | } else { | |
e61a1e0a | 1493 | field->info->put(f, addr, size); |
f11f6a5f | 1494 | } |
ec245e21 | 1495 | } |
dde0463b | 1496 | } |
9ed7d6ae JQ |
1497 | field++; |
1498 | } | |
811814bd | 1499 | vmstate_subsection_save(f, vmsd, opaque); |
9ed7d6ae JQ |
1500 | } |
1501 | ||
4082be4d JQ |
1502 | static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1503 | { | |
9ed7d6ae | 1504 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1505 | return se->ops->load_state(f, se->opaque, version_id); |
9ed7d6ae JQ |
1506 | } |
1507 | return vmstate_load_state(f, se->vmsd, se->opaque, version_id); | |
4082be4d JQ |
1508 | } |
1509 | ||
dc912121 | 1510 | static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
4082be4d | 1511 | { |
9ed7d6ae | 1512 | if (!se->vmsd) { /* Old style */ |
22ea40f4 | 1513 | se->ops->save_state(f, se->opaque); |
dc912121 | 1514 | return; |
9ed7d6ae JQ |
1515 | } |
1516 | vmstate_save_state(f,se->vmsd, se->opaque); | |
4082be4d JQ |
1517 | } |
1518 | ||
a672b469 AL |
1519 | #define QEMU_VM_FILE_MAGIC 0x5145564d |
1520 | #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 | |
1521 | #define QEMU_VM_FILE_VERSION 0x00000003 | |
1522 | ||
1523 | #define QEMU_VM_EOF 0x00 | |
1524 | #define QEMU_VM_SECTION_START 0x01 | |
1525 | #define QEMU_VM_SECTION_PART 0x02 | |
1526 | #define QEMU_VM_SECTION_END 0x03 | |
1527 | #define QEMU_VM_SECTION_FULL 0x04 | |
811814bd | 1528 | #define QEMU_VM_SUBSECTION 0x05 |
a672b469 | 1529 | |
e1c37d0e | 1530 | bool qemu_savevm_state_blocked(Error **errp) |
dc912121 AW |
1531 | { |
1532 | SaveStateEntry *se; | |
1533 | ||
1534 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1535 | if (se->no_migrate) { | |
e1c37d0e | 1536 | error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
dc912121 AW |
1537 | return true; |
1538 | } | |
1539 | } | |
1540 | return false; | |
1541 | } | |
1542 | ||
6607ae23 IY |
1543 | int qemu_savevm_state_begin(QEMUFile *f, |
1544 | const MigrationParams *params) | |
a672b469 AL |
1545 | { |
1546 | SaveStateEntry *se; | |
39346385 | 1547 | int ret; |
a672b469 | 1548 | |
c163b5ca | 1549 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
22ea40f4 | 1550 | if (!se->ops || !se->ops->set_params) { |
c163b5ca | 1551 | continue; |
6607ae23 | 1552 | } |
22ea40f4 | 1553 | se->ops->set_params(params, se->opaque); |
c163b5ca LS |
1554 | } |
1555 | ||
a672b469 AL |
1556 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1557 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1558 | ||
72cf2d4f | 1559 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1560 | int len; |
1561 | ||
d1315aac | 1562 | if (!se->ops || !se->ops->save_live_setup) { |
a672b469 | 1563 | continue; |
22ea40f4 | 1564 | } |
6bd68781 JQ |
1565 | if (se->ops && se->ops->is_active) { |
1566 | if (!se->ops->is_active(se->opaque)) { | |
1567 | continue; | |
1568 | } | |
1569 | } | |
a672b469 AL |
1570 | /* Section type */ |
1571 | qemu_put_byte(f, QEMU_VM_SECTION_START); | |
1572 | qemu_put_be32(f, se->section_id); | |
1573 | ||
1574 | /* ID string */ | |
1575 | len = strlen(se->idstr); | |
1576 | qemu_put_byte(f, len); | |
1577 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1578 | ||
1579 | qemu_put_be32(f, se->instance_id); | |
1580 | qemu_put_be32(f, se->version_id); | |
1581 | ||
d1315aac | 1582 | ret = se->ops->save_live_setup(f, se->opaque); |
2975725f | 1583 | if (ret < 0) { |
539de124 | 1584 | qemu_savevm_state_cancel(f); |
2975725f JQ |
1585 | return ret; |
1586 | } | |
a672b469 | 1587 | } |
624b9cc2 | 1588 | ret = qemu_file_get_error(f); |
39346385 | 1589 | if (ret != 0) { |
539de124 | 1590 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1591 | } |
a672b469 | 1592 | |
39346385 JQ |
1593 | return ret; |
1594 | ||
a672b469 AL |
1595 | } |
1596 | ||
39346385 | 1597 | /* |
07f35073 | 1598 | * this function has three return values: |
39346385 JQ |
1599 | * negative: there was one error, and we have -errno. |
1600 | * 0 : We haven't finished, caller have to go again | |
1601 | * 1 : We have finished, we can go to complete phase | |
1602 | */ | |
539de124 | 1603 | int qemu_savevm_state_iterate(QEMUFile *f) |
a672b469 AL |
1604 | { |
1605 | SaveStateEntry *se; | |
1606 | int ret = 1; | |
1607 | ||
72cf2d4f | 1608 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1609 | if (!se->ops || !se->ops->save_live_iterate) { |
a672b469 | 1610 | continue; |
22ea40f4 | 1611 | } |
6bd68781 JQ |
1612 | if (se->ops && se->ops->is_active) { |
1613 | if (!se->ops->is_active(se->opaque)) { | |
1614 | continue; | |
1615 | } | |
1616 | } | |
aac844ed JQ |
1617 | if (qemu_file_rate_limit(f)) { |
1618 | return 0; | |
1619 | } | |
517a13c9 | 1620 | trace_savevm_section_start(); |
a672b469 AL |
1621 | /* Section type */ |
1622 | qemu_put_byte(f, QEMU_VM_SECTION_PART); | |
1623 | qemu_put_be32(f, se->section_id); | |
1624 | ||
16310a3c | 1625 | ret = se->ops->save_live_iterate(f, se->opaque); |
517a13c9 JQ |
1626 | trace_savevm_section_end(se->section_id); |
1627 | ||
2975725f | 1628 | if (ret <= 0) { |
90697be8 JK |
1629 | /* Do not proceed to the next vmstate before this one reported |
1630 | completion of the current stage. This serializes the migration | |
1631 | and reduces the probability that a faster changing state is | |
1632 | synchronized over and over again. */ | |
1633 | break; | |
1634 | } | |
a672b469 | 1635 | } |
39346385 JQ |
1636 | if (ret != 0) { |
1637 | return ret; | |
1638 | } | |
624b9cc2 | 1639 | ret = qemu_file_get_error(f); |
39346385 | 1640 | if (ret != 0) { |
539de124 | 1641 | qemu_savevm_state_cancel(f); |
4ec7fcc7 | 1642 | } |
39346385 | 1643 | return ret; |
a672b469 AL |
1644 | } |
1645 | ||
539de124 | 1646 | int qemu_savevm_state_complete(QEMUFile *f) |
a672b469 AL |
1647 | { |
1648 | SaveStateEntry *se; | |
2975725f | 1649 | int ret; |
a672b469 | 1650 | |
ea375f9a JK |
1651 | cpu_synchronize_all_states(); |
1652 | ||
72cf2d4f | 1653 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
16310a3c | 1654 | if (!se->ops || !se->ops->save_live_complete) { |
a672b469 | 1655 | continue; |
22ea40f4 | 1656 | } |
6bd68781 JQ |
1657 | if (se->ops && se->ops->is_active) { |
1658 | if (!se->ops->is_active(se->opaque)) { | |
1659 | continue; | |
1660 | } | |
1661 | } | |
517a13c9 | 1662 | trace_savevm_section_start(); |
a672b469 AL |
1663 | /* Section type */ |
1664 | qemu_put_byte(f, QEMU_VM_SECTION_END); | |
1665 | qemu_put_be32(f, se->section_id); | |
1666 | ||
16310a3c | 1667 | ret = se->ops->save_live_complete(f, se->opaque); |
517a13c9 | 1668 | trace_savevm_section_end(se->section_id); |
2975725f JQ |
1669 | if (ret < 0) { |
1670 | return ret; | |
1671 | } | |
a672b469 AL |
1672 | } |
1673 | ||
72cf2d4f | 1674 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 AL |
1675 | int len; |
1676 | ||
22ea40f4 | 1677 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a672b469 | 1678 | continue; |
22ea40f4 | 1679 | } |
517a13c9 | 1680 | trace_savevm_section_start(); |
a672b469 AL |
1681 | /* Section type */ |
1682 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1683 | qemu_put_be32(f, se->section_id); | |
1684 | ||
1685 | /* ID string */ | |
1686 | len = strlen(se->idstr); | |
1687 | qemu_put_byte(f, len); | |
1688 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1689 | ||
1690 | qemu_put_be32(f, se->instance_id); | |
1691 | qemu_put_be32(f, se->version_id); | |
1692 | ||
dc912121 | 1693 | vmstate_save(f, se); |
517a13c9 | 1694 | trace_savevm_section_end(se->section_id); |
a672b469 AL |
1695 | } |
1696 | ||
1697 | qemu_put_byte(f, QEMU_VM_EOF); | |
1698 | ||
624b9cc2 | 1699 | return qemu_file_get_error(f); |
a672b469 AL |
1700 | } |
1701 | ||
539de124 | 1702 | void qemu_savevm_state_cancel(QEMUFile *f) |
4ec7fcc7 JK |
1703 | { |
1704 | SaveStateEntry *se; | |
1705 | ||
1706 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
9b5bfab0 JQ |
1707 | if (se->ops && se->ops->cancel) { |
1708 | se->ops->cancel(se->opaque); | |
4ec7fcc7 JK |
1709 | } |
1710 | } | |
1711 | } | |
1712 | ||
e1c37d0e | 1713 | static int qemu_savevm_state(QEMUFile *f) |
a672b469 | 1714 | { |
a672b469 | 1715 | int ret; |
6607ae23 IY |
1716 | MigrationParams params = { |
1717 | .blk = 0, | |
1718 | .shared = 0 | |
1719 | }; | |
a672b469 | 1720 | |
e1c37d0e | 1721 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1722 | ret = -EINVAL; |
1723 | goto out; | |
1724 | } | |
1725 | ||
6607ae23 | 1726 | ret = qemu_savevm_state_begin(f, ¶ms); |
a672b469 AL |
1727 | if (ret < 0) |
1728 | goto out; | |
1729 | ||
1730 | do { | |
539de124 | 1731 | ret = qemu_savevm_state_iterate(f); |
a672b469 AL |
1732 | if (ret < 0) |
1733 | goto out; | |
1734 | } while (ret == 0); | |
1735 | ||
539de124 | 1736 | ret = qemu_savevm_state_complete(f); |
a672b469 AL |
1737 | |
1738 | out: | |
39346385 | 1739 | if (ret == 0) { |
624b9cc2 | 1740 | ret = qemu_file_get_error(f); |
39346385 | 1741 | } |
a672b469 | 1742 | |
a672b469 AL |
1743 | return ret; |
1744 | } | |
1745 | ||
a7ae8355 SS |
1746 | static int qemu_save_device_state(QEMUFile *f) |
1747 | { | |
1748 | SaveStateEntry *se; | |
1749 | ||
1750 | qemu_put_be32(f, QEMU_VM_FILE_MAGIC); | |
1751 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
1752 | ||
1753 | cpu_synchronize_all_states(); | |
1754 | ||
1755 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { | |
1756 | int len; | |
1757 | ||
1758 | if (se->is_ram) { | |
1759 | continue; | |
1760 | } | |
22ea40f4 | 1761 | if ((!se->ops || !se->ops->save_state) && !se->vmsd) { |
a7ae8355 SS |
1762 | continue; |
1763 | } | |
1764 | ||
1765 | /* Section type */ | |
1766 | qemu_put_byte(f, QEMU_VM_SECTION_FULL); | |
1767 | qemu_put_be32(f, se->section_id); | |
1768 | ||
1769 | /* ID string */ | |
1770 | len = strlen(se->idstr); | |
1771 | qemu_put_byte(f, len); | |
1772 | qemu_put_buffer(f, (uint8_t *)se->idstr, len); | |
1773 | ||
1774 | qemu_put_be32(f, se->instance_id); | |
1775 | qemu_put_be32(f, se->version_id); | |
1776 | ||
1777 | vmstate_save(f, se); | |
1778 | } | |
1779 | ||
1780 | qemu_put_byte(f, QEMU_VM_EOF); | |
1781 | ||
1782 | return qemu_file_get_error(f); | |
1783 | } | |
1784 | ||
a672b469 AL |
1785 | static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1786 | { | |
1787 | SaveStateEntry *se; | |
1788 | ||
72cf2d4f | 1789 | QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
a672b469 | 1790 | if (!strcmp(se->idstr, idstr) && |
4d2ffa08 JK |
1791 | (instance_id == se->instance_id || |
1792 | instance_id == se->alias_id)) | |
a672b469 | 1793 | return se; |
7685ee6a AW |
1794 | /* Migrating from an older version? */ |
1795 | if (strstr(se->idstr, idstr) && se->compat) { | |
1796 | if (!strcmp(se->compat->idstr, idstr) && | |
1797 | (instance_id == se->compat->instance_id || | |
1798 | instance_id == se->alias_id)) | |
1799 | return se; | |
1800 | } | |
a672b469 AL |
1801 | } |
1802 | return NULL; | |
1803 | } | |
1804 | ||
811814bd JQ |
1805 | static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1806 | { | |
1807 | while(sub && sub->needed) { | |
1808 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
1809 | return sub->vmsd; | |
1810 | } | |
1811 | sub++; | |
1812 | } | |
1813 | return NULL; | |
1814 | } | |
1815 | ||
1816 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
1817 | void *opaque) | |
1818 | { | |
c6380724 | 1819 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
811814bd JQ |
1820 | char idstr[256]; |
1821 | int ret; | |
c6380724 | 1822 | uint8_t version_id, len, size; |
811814bd JQ |
1823 | const VMStateDescription *sub_vmsd; |
1824 | ||
c6380724 JQ |
1825 | len = qemu_peek_byte(f, 1); |
1826 | if (len < strlen(vmsd->name) + 1) { | |
1827 | /* subsection name has be be "section_name/a" */ | |
1828 | return 0; | |
1829 | } | |
1830 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
1831 | if (size != len) { | |
1832 | return 0; | |
1833 | } | |
1834 | idstr[size] = 0; | |
811814bd | 1835 | |
c6380724 JQ |
1836 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1837 | /* it don't have a valid subsection name */ | |
1838 | return 0; | |
1839 | } | |
3da9eebd | 1840 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
811814bd JQ |
1841 | if (sub_vmsd == NULL) { |
1842 | return -ENOENT; | |
1843 | } | |
c6380724 JQ |
1844 | qemu_file_skip(f, 1); /* subsection */ |
1845 | qemu_file_skip(f, 1); /* len */ | |
1846 | qemu_file_skip(f, len); /* idstr */ | |
1847 | version_id = qemu_get_be32(f); | |
1848 | ||
811814bd JQ |
1849 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1850 | if (ret) { | |
1851 | return ret; | |
1852 | } | |
1853 | } | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
1858 | void *opaque) | |
1859 | { | |
1860 | const VMStateSubsection *sub = vmsd->subsections; | |
1861 | ||
1862 | while (sub && sub->needed) { | |
1863 | if (sub->needed(opaque)) { | |
1864 | const VMStateDescription *vmsd = sub->vmsd; | |
1865 | uint8_t len; | |
1866 | ||
1867 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
1868 | len = strlen(vmsd->name); | |
1869 | qemu_put_byte(f, len); | |
1870 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
1871 | qemu_put_be32(f, vmsd->version_id); | |
1872 | vmstate_save_state(f, vmsd, opaque); | |
1873 | } | |
1874 | sub++; | |
1875 | } | |
1876 | } | |
1877 | ||
a672b469 | 1878 | typedef struct LoadStateEntry { |
72cf2d4f | 1879 | QLIST_ENTRY(LoadStateEntry) entry; |
a672b469 AL |
1880 | SaveStateEntry *se; |
1881 | int section_id; | |
1882 | int version_id; | |
a672b469 AL |
1883 | } LoadStateEntry; |
1884 | ||
a672b469 AL |
1885 | int qemu_loadvm_state(QEMUFile *f) |
1886 | { | |
72cf2d4f BS |
1887 | QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1888 | QLIST_HEAD_INITIALIZER(loadvm_handlers); | |
f4dbb8dd | 1889 | LoadStateEntry *le, *new_le; |
a672b469 AL |
1890 | uint8_t section_type; |
1891 | unsigned int v; | |
1892 | int ret; | |
1893 | ||
e1c37d0e | 1894 | if (qemu_savevm_state_blocked(NULL)) { |
dc912121 AW |
1895 | return -EINVAL; |
1896 | } | |
1897 | ||
a672b469 AL |
1898 | v = qemu_get_be32(f); |
1899 | if (v != QEMU_VM_FILE_MAGIC) | |
1900 | return -EINVAL; | |
1901 | ||
1902 | v = qemu_get_be32(f); | |
bbfe1408 JQ |
1903 | if (v == QEMU_VM_FILE_VERSION_COMPAT) { |
1904 | fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); | |
1905 | return -ENOTSUP; | |
1906 | } | |
a672b469 AL |
1907 | if (v != QEMU_VM_FILE_VERSION) |
1908 | return -ENOTSUP; | |
1909 | ||
1910 | while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { | |
1911 | uint32_t instance_id, version_id, section_id; | |
a672b469 AL |
1912 | SaveStateEntry *se; |
1913 | char idstr[257]; | |
1914 | int len; | |
1915 | ||
1916 | switch (section_type) { | |
1917 | case QEMU_VM_SECTION_START: | |
1918 | case QEMU_VM_SECTION_FULL: | |
1919 | /* Read section start */ | |
1920 | section_id = qemu_get_be32(f); | |
1921 | len = qemu_get_byte(f); | |
1922 | qemu_get_buffer(f, (uint8_t *)idstr, len); | |
1923 | idstr[len] = 0; | |
1924 | instance_id = qemu_get_be32(f); | |
1925 | version_id = qemu_get_be32(f); | |
1926 | ||
1927 | /* Find savevm section */ | |
1928 | se = find_se(idstr, instance_id); | |
1929 | if (se == NULL) { | |
1930 | fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); | |
1931 | ret = -EINVAL; | |
1932 | goto out; | |
1933 | } | |
1934 | ||
1935 | /* Validate version */ | |
1936 | if (version_id > se->version_id) { | |
1937 | fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", | |
1938 | version_id, idstr, se->version_id); | |
1939 | ret = -EINVAL; | |
1940 | goto out; | |
1941 | } | |
1942 | ||
1943 | /* Add entry */ | |
7267c094 | 1944 | le = g_malloc0(sizeof(*le)); |
a672b469 AL |
1945 | |
1946 | le->se = se; | |
1947 | le->section_id = section_id; | |
1948 | le->version_id = version_id; | |
72cf2d4f | 1949 | QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
a672b469 | 1950 | |
4082be4d | 1951 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1952 | if (ret < 0) { |
1953 | fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", | |
1954 | instance_id, idstr); | |
1955 | goto out; | |
1956 | } | |
a672b469 AL |
1957 | break; |
1958 | case QEMU_VM_SECTION_PART: | |
1959 | case QEMU_VM_SECTION_END: | |
1960 | section_id = qemu_get_be32(f); | |
1961 | ||
72cf2d4f | 1962 | QLIST_FOREACH(le, &loadvm_handlers, entry) { |
f4dbb8dd JQ |
1963 | if (le->section_id == section_id) { |
1964 | break; | |
1965 | } | |
1966 | } | |
a672b469 AL |
1967 | if (le == NULL) { |
1968 | fprintf(stderr, "Unknown savevm section %d\n", section_id); | |
1969 | ret = -EINVAL; | |
1970 | goto out; | |
1971 | } | |
1972 | ||
4082be4d | 1973 | ret = vmstate_load(f, le->se, le->version_id); |
b5a22e4a JQ |
1974 | if (ret < 0) { |
1975 | fprintf(stderr, "qemu: warning: error while loading state section id %d\n", | |
1976 | section_id); | |
1977 | goto out; | |
1978 | } | |
a672b469 AL |
1979 | break; |
1980 | default: | |
1981 | fprintf(stderr, "Unknown savevm section type %d\n", section_type); | |
1982 | ret = -EINVAL; | |
1983 | goto out; | |
1984 | } | |
1985 | } | |
1986 | ||
ea375f9a JK |
1987 | cpu_synchronize_all_post_init(); |
1988 | ||
a672b469 AL |
1989 | ret = 0; |
1990 | ||
1991 | out: | |
72cf2d4f BS |
1992 | QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1993 | QLIST_REMOVE(le, entry); | |
7267c094 | 1994 | g_free(le); |
a672b469 AL |
1995 | } |
1996 | ||
42802d47 JQ |
1997 | if (ret == 0) { |
1998 | ret = qemu_file_get_error(f); | |
624b9cc2 | 1999 | } |
a672b469 AL |
2000 | |
2001 | return ret; | |
2002 | } | |
2003 | ||
a672b469 AL |
2004 | static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2005 | const char *name) | |
2006 | { | |
2007 | QEMUSnapshotInfo *sn_tab, *sn; | |
2008 | int nb_sns, i, ret; | |
2009 | ||
2010 | ret = -ENOENT; | |
2011 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2012 | if (nb_sns < 0) | |
2013 | return ret; | |
2014 | for(i = 0; i < nb_sns; i++) { | |
2015 | sn = &sn_tab[i]; | |
2016 | if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) { | |
2017 | *sn_info = *sn; | |
2018 | ret = 0; | |
2019 | break; | |
2020 | } | |
2021 | } | |
7267c094 | 2022 | g_free(sn_tab); |
a672b469 AL |
2023 | return ret; |
2024 | } | |
2025 | ||
cb499fb2 KW |
2026 | /* |
2027 | * Deletes snapshots of a given name in all opened images. | |
2028 | */ | |
2029 | static int del_existing_snapshots(Monitor *mon, const char *name) | |
2030 | { | |
2031 | BlockDriverState *bs; | |
cb499fb2 KW |
2032 | QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2033 | int ret; | |
2034 | ||
dbc13590 MA |
2035 | bs = NULL; |
2036 | while ((bs = bdrv_next(bs))) { | |
cb499fb2 KW |
2037 | if (bdrv_can_snapshot(bs) && |
2038 | bdrv_snapshot_find(bs, snapshot, name) >= 0) | |
2039 | { | |
2040 | ret = bdrv_snapshot_delete(bs, name); | |
2041 | if (ret < 0) { | |
2042 | monitor_printf(mon, | |
2043 | "Error while deleting snapshot on '%s'\n", | |
2044 | bdrv_get_device_name(bs)); | |
2045 | return -1; | |
2046 | } | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | return 0; | |
2051 | } | |
2052 | ||
d54908a5 | 2053 | void do_savevm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2054 | { |
2055 | BlockDriverState *bs, *bs1; | |
2056 | QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; | |
cb499fb2 | 2057 | int ret; |
a672b469 AL |
2058 | QEMUFile *f; |
2059 | int saved_vm_running; | |
c2c9a466 | 2060 | uint64_t vm_state_size; |
a672b469 AL |
2061 | #ifdef _WIN32 |
2062 | struct _timeb tb; | |
7d631a11 | 2063 | struct tm *ptm; |
a672b469 AL |
2064 | #else |
2065 | struct timeval tv; | |
7d631a11 | 2066 | struct tm tm; |
a672b469 | 2067 | #endif |
d54908a5 | 2068 | const char *name = qdict_get_try_str(qdict, "name"); |
a672b469 | 2069 | |
feeee5ac | 2070 | /* Verify if there is a device that doesn't support snapshots and is writable */ |
dbc13590 MA |
2071 | bs = NULL; |
2072 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2073 | |
07b70bfb | 2074 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2075 | continue; |
2076 | } | |
2077 | ||
2078 | if (!bdrv_can_snapshot(bs)) { | |
2079 | monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", | |
2080 | bdrv_get_device_name(bs)); | |
2081 | return; | |
2082 | } | |
2083 | } | |
2084 | ||
f9092b10 | 2085 | bs = bdrv_snapshots(); |
a672b469 | 2086 | if (!bs) { |
376253ec | 2087 | monitor_printf(mon, "No block device can accept snapshots\n"); |
a672b469 AL |
2088 | return; |
2089 | } | |
a672b469 | 2090 | |
1354869c | 2091 | saved_vm_running = runstate_is_running(); |
0461d5a6 | 2092 | vm_stop(RUN_STATE_SAVE_VM); |
a672b469 | 2093 | |
cb499fb2 | 2094 | memset(sn, 0, sizeof(*sn)); |
a672b469 AL |
2095 | |
2096 | /* fill auxiliary fields */ | |
2097 | #ifdef _WIN32 | |
2098 | _ftime(&tb); | |
2099 | sn->date_sec = tb.time; | |
2100 | sn->date_nsec = tb.millitm * 1000000; | |
2101 | #else | |
2102 | gettimeofday(&tv, NULL); | |
2103 | sn->date_sec = tv.tv_sec; | |
2104 | sn->date_nsec = tv.tv_usec * 1000; | |
2105 | #endif | |
74475455 | 2106 | sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
a672b469 | 2107 | |
7d631a11 MDCF |
2108 | if (name) { |
2109 | ret = bdrv_snapshot_find(bs, old_sn, name); | |
2110 | if (ret >= 0) { | |
2111 | pstrcpy(sn->name, sizeof(sn->name), old_sn->name); | |
2112 | pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); | |
2113 | } else { | |
2114 | pstrcpy(sn->name, sizeof(sn->name), name); | |
2115 | } | |
2116 | } else { | |
2117 | #ifdef _WIN32 | |
55dd9ffa SW |
2118 | time_t t = tb.time; |
2119 | ptm = localtime(&t); | |
7d631a11 MDCF |
2120 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2121 | #else | |
d7d9b528 BS |
2122 | /* cast below needed for OpenBSD where tv_sec is still 'long' */ |
2123 | localtime_r((const time_t *)&tv.tv_sec, &tm); | |
7d631a11 MDCF |
2124 | strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2125 | #endif | |
2126 | } | |
2127 | ||
cb499fb2 | 2128 | /* Delete old snapshots of the same name */ |
f139a412 | 2129 | if (name && del_existing_snapshots(mon, name) < 0) { |
cb499fb2 KW |
2130 | goto the_end; |
2131 | } | |
2132 | ||
a672b469 | 2133 | /* save the VM state */ |
45566e9c | 2134 | f = qemu_fopen_bdrv(bs, 1); |
a672b469 | 2135 | if (!f) { |
376253ec | 2136 | monitor_printf(mon, "Could not open VM state file\n"); |
a672b469 AL |
2137 | goto the_end; |
2138 | } | |
e1c37d0e | 2139 | ret = qemu_savevm_state(f); |
2d22b18f | 2140 | vm_state_size = qemu_ftell(f); |
a672b469 AL |
2141 | qemu_fclose(f); |
2142 | if (ret < 0) { | |
376253ec | 2143 | monitor_printf(mon, "Error %d while writing VM\n", ret); |
a672b469 AL |
2144 | goto the_end; |
2145 | } | |
2146 | ||
2147 | /* create the snapshots */ | |
2148 | ||
dbc13590 MA |
2149 | bs1 = NULL; |
2150 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2151 | if (bdrv_can_snapshot(bs1)) { |
2d22b18f AL |
2152 | /* Write VM state size only to the image that contains the state */ |
2153 | sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); | |
a672b469 AL |
2154 | ret = bdrv_snapshot_create(bs1, sn); |
2155 | if (ret < 0) { | |
376253ec AL |
2156 | monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
2157 | bdrv_get_device_name(bs1)); | |
a672b469 AL |
2158 | } |
2159 | } | |
2160 | } | |
2161 | ||
2162 | the_end: | |
2163 | if (saved_vm_running) | |
2164 | vm_start(); | |
2165 | } | |
2166 | ||
a7ae8355 SS |
2167 | void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2168 | { | |
2169 | QEMUFile *f; | |
2170 | int saved_vm_running; | |
2171 | int ret; | |
2172 | ||
2173 | saved_vm_running = runstate_is_running(); | |
2174 | vm_stop(RUN_STATE_SAVE_VM); | |
2175 | ||
2176 | f = qemu_fopen(filename, "wb"); | |
2177 | if (!f) { | |
2178 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
2179 | goto the_end; | |
2180 | } | |
2181 | ret = qemu_save_device_state(f); | |
2182 | qemu_fclose(f); | |
2183 | if (ret < 0) { | |
2184 | error_set(errp, QERR_IO_ERROR); | |
2185 | } | |
2186 | ||
2187 | the_end: | |
2188 | if (saved_vm_running) | |
2189 | vm_start(); | |
a7ae8355 SS |
2190 | } |
2191 | ||
03cd4655 | 2192 | int load_vmstate(const char *name) |
a672b469 | 2193 | { |
f0aa7a8b | 2194 | BlockDriverState *bs, *bs_vm_state; |
2d22b18f | 2195 | QEMUSnapshotInfo sn; |
a672b469 | 2196 | QEMUFile *f; |
751c6a17 | 2197 | int ret; |
a672b469 | 2198 | |
f0aa7a8b MDCF |
2199 | bs_vm_state = bdrv_snapshots(); |
2200 | if (!bs_vm_state) { | |
2201 | error_report("No block device supports snapshots"); | |
2202 | return -ENOTSUP; | |
2203 | } | |
2204 | ||
2205 | /* Don't even try to load empty VM states */ | |
2206 | ret = bdrv_snapshot_find(bs_vm_state, &sn, name); | |
2207 | if (ret < 0) { | |
2208 | return ret; | |
2209 | } else if (sn.vm_state_size == 0) { | |
e11480db KW |
2210 | error_report("This is a disk-only snapshot. Revert to it offline " |
2211 | "using qemu-img."); | |
f0aa7a8b MDCF |
2212 | return -EINVAL; |
2213 | } | |
2214 | ||
2215 | /* Verify if there is any device that doesn't support snapshots and is | |
2216 | writable and check if the requested snapshot is available too. */ | |
dbc13590 MA |
2217 | bs = NULL; |
2218 | while ((bs = bdrv_next(bs))) { | |
feeee5ac | 2219 | |
07b70bfb | 2220 | if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
feeee5ac MDCF |
2221 | continue; |
2222 | } | |
2223 | ||
2224 | if (!bdrv_can_snapshot(bs)) { | |
2225 | error_report("Device '%s' is writable but does not support snapshots.", | |
2226 | bdrv_get_device_name(bs)); | |
2227 | return -ENOTSUP; | |
2228 | } | |
feeee5ac | 2229 | |
f0aa7a8b MDCF |
2230 | ret = bdrv_snapshot_find(bs, &sn, name); |
2231 | if (ret < 0) { | |
2232 | error_report("Device '%s' does not have the requested snapshot '%s'", | |
2233 | bdrv_get_device_name(bs), name); | |
2234 | return ret; | |
2235 | } | |
a672b469 AL |
2236 | } |
2237 | ||
2238 | /* Flush all IO requests so they don't interfere with the new state. */ | |
922453bc | 2239 | bdrv_drain_all(); |
a672b469 | 2240 | |
f0aa7a8b MDCF |
2241 | bs = NULL; |
2242 | while ((bs = bdrv_next(bs))) { | |
2243 | if (bdrv_can_snapshot(bs)) { | |
2244 | ret = bdrv_snapshot_goto(bs, name); | |
a672b469 | 2245 | if (ret < 0) { |
f0aa7a8b MDCF |
2246 | error_report("Error %d while activating snapshot '%s' on '%s'", |
2247 | ret, name, bdrv_get_device_name(bs)); | |
2248 | return ret; | |
a672b469 AL |
2249 | } |
2250 | } | |
2251 | } | |
2252 | ||
a672b469 | 2253 | /* restore the VM state */ |
f0aa7a8b | 2254 | f = qemu_fopen_bdrv(bs_vm_state, 0); |
a672b469 | 2255 | if (!f) { |
1ecda02b | 2256 | error_report("Could not open VM state file"); |
05f2401e | 2257 | return -EINVAL; |
a672b469 | 2258 | } |
f0aa7a8b | 2259 | |
5a8a49d7 | 2260 | qemu_system_reset(VMRESET_SILENT); |
a672b469 | 2261 | ret = qemu_loadvm_state(f); |
f0aa7a8b | 2262 | |
a672b469 AL |
2263 | qemu_fclose(f); |
2264 | if (ret < 0) { | |
1ecda02b | 2265 | error_report("Error %d while loading VM state", ret); |
05f2401e | 2266 | return ret; |
a672b469 | 2267 | } |
f0aa7a8b | 2268 | |
05f2401e | 2269 | return 0; |
7b630349 JQ |
2270 | } |
2271 | ||
d54908a5 | 2272 | void do_delvm(Monitor *mon, const QDict *qdict) |
a672b469 AL |
2273 | { |
2274 | BlockDriverState *bs, *bs1; | |
751c6a17 | 2275 | int ret; |
d54908a5 | 2276 | const char *name = qdict_get_str(qdict, "name"); |
a672b469 | 2277 | |
f9092b10 | 2278 | bs = bdrv_snapshots(); |
a672b469 | 2279 | if (!bs) { |
376253ec | 2280 | monitor_printf(mon, "No block device supports snapshots\n"); |
a672b469 AL |
2281 | return; |
2282 | } | |
2283 | ||
dbc13590 MA |
2284 | bs1 = NULL; |
2285 | while ((bs1 = bdrv_next(bs1))) { | |
feeee5ac | 2286 | if (bdrv_can_snapshot(bs1)) { |
a672b469 AL |
2287 | ret = bdrv_snapshot_delete(bs1, name); |
2288 | if (ret < 0) { | |
2289 | if (ret == -ENOTSUP) | |
376253ec AL |
2290 | monitor_printf(mon, |
2291 | "Snapshots not supported on device '%s'\n", | |
2292 | bdrv_get_device_name(bs1)); | |
a672b469 | 2293 | else |
376253ec AL |
2294 | monitor_printf(mon, "Error %d while deleting snapshot on " |
2295 | "'%s'\n", ret, bdrv_get_device_name(bs1)); | |
a672b469 AL |
2296 | } |
2297 | } | |
2298 | } | |
2299 | } | |
2300 | ||
376253ec | 2301 | void do_info_snapshots(Monitor *mon) |
a672b469 AL |
2302 | { |
2303 | BlockDriverState *bs, *bs1; | |
f9209915 MDCF |
2304 | QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2305 | int nb_sns, i, ret, available; | |
2306 | int total; | |
2307 | int *available_snapshots; | |
a672b469 AL |
2308 | char buf[256]; |
2309 | ||
f9092b10 | 2310 | bs = bdrv_snapshots(); |
a672b469 | 2311 | if (!bs) { |
376253ec | 2312 | monitor_printf(mon, "No available block device supports snapshots\n"); |
a672b469 AL |
2313 | return; |
2314 | } | |
a672b469 AL |
2315 | |
2316 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2317 | if (nb_sns < 0) { | |
376253ec | 2318 | monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
a672b469 AL |
2319 | return; |
2320 | } | |
f9209915 MDCF |
2321 | |
2322 | if (nb_sns == 0) { | |
2323 | monitor_printf(mon, "There is no snapshot available.\n"); | |
2324 | return; | |
2325 | } | |
2326 | ||
7267c094 | 2327 | available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
f9209915 MDCF |
2328 | total = 0; |
2329 | for (i = 0; i < nb_sns; i++) { | |
a672b469 | 2330 | sn = &sn_tab[i]; |
f9209915 MDCF |
2331 | available = 1; |
2332 | bs1 = NULL; | |
2333 | ||
2334 | while ((bs1 = bdrv_next(bs1))) { | |
2335 | if (bdrv_can_snapshot(bs1) && bs1 != bs) { | |
2336 | ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); | |
2337 | if (ret < 0) { | |
2338 | available = 0; | |
2339 | break; | |
2340 | } | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | if (available) { | |
2345 | available_snapshots[total] = i; | |
2346 | total++; | |
2347 | } | |
a672b469 | 2348 | } |
f9209915 MDCF |
2349 | |
2350 | if (total > 0) { | |
2351 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
2352 | for (i = 0; i < total; i++) { | |
2353 | sn = &sn_tab[available_snapshots[i]]; | |
2354 | monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
2355 | } | |
2356 | } else { | |
2357 | monitor_printf(mon, "There is no suitable snapshot available\n"); | |
2358 | } | |
2359 | ||
7267c094 AL |
2360 | g_free(sn_tab); |
2361 | g_free(available_snapshots); | |
f9209915 | 2362 | |
a672b469 | 2363 | } |
c5705a77 AK |
2364 | |
2365 | void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) | |
2366 | { | |
1ddde087 | 2367 | qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
c5705a77 AK |
2368 | memory_region_name(mr), dev); |
2369 | } | |
2370 | ||
2371 | void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) | |
2372 | { | |
2373 | /* Nothing do to while the implementation is in RAMBlock */ | |
2374 | } | |
2375 | ||
2376 | void vmstate_register_ram_global(MemoryRegion *mr) | |
2377 | { | |
2378 | vmstate_register_ram(mr, NULL); | |
2379 | } | |
302dfbeb OW |
2380 | |
2381 | /* | |
2382 | page = zrun nzrun | |
2383 | | zrun nzrun page | |
2384 | ||
2385 | zrun = length | |
2386 | ||
2387 | nzrun = length byte... | |
2388 | ||
2389 | length = uleb128 encoded integer | |
2390 | */ | |
2391 | int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, | |
2392 | uint8_t *dst, int dlen) | |
2393 | { | |
2394 | uint32_t zrun_len = 0, nzrun_len = 0; | |
2395 | int d = 0, i = 0; | |
2396 | long res, xor; | |
2397 | uint8_t *nzrun_start = NULL; | |
2398 | ||
2399 | g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % | |
2400 | sizeof(long))); | |
2401 | ||
2402 | while (i < slen) { | |
2403 | /* overflow */ | |
2404 | if (d + 2 > dlen) { | |
2405 | return -1; | |
2406 | } | |
2407 | ||
2408 | /* not aligned to sizeof(long) */ | |
2409 | res = (slen - i) % sizeof(long); | |
2410 | while (res && old_buf[i] == new_buf[i]) { | |
2411 | zrun_len++; | |
2412 | i++; | |
2413 | res--; | |
2414 | } | |
2415 | ||
2416 | /* word at a time for speed */ | |
2417 | if (!res) { | |
2418 | while (i < slen && | |
2419 | (*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { | |
2420 | i += sizeof(long); | |
2421 | zrun_len += sizeof(long); | |
2422 | } | |
2423 | ||
2424 | /* go over the rest */ | |
2425 | while (i < slen && old_buf[i] == new_buf[i]) { | |
2426 | zrun_len++; | |
2427 | i++; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | /* buffer unchanged */ | |
2432 | if (zrun_len == slen) { | |
2433 | return 0; | |
2434 | } | |
2435 | ||
2436 | /* skip last zero run */ | |
2437 | if (i == slen) { | |
2438 | return d; | |
2439 | } | |
2440 | ||
2441 | d += uleb128_encode_small(dst + d, zrun_len); | |
2442 | ||
2443 | zrun_len = 0; | |
2444 | nzrun_start = new_buf + i; | |
2445 | ||
2446 | /* overflow */ | |
2447 | if (d + 2 > dlen) { | |
2448 | return -1; | |
2449 | } | |
2450 | /* not aligned to sizeof(long) */ | |
2451 | res = (slen - i) % sizeof(long); | |
2452 | while (res && old_buf[i] != new_buf[i]) { | |
2453 | i++; | |
2454 | nzrun_len++; | |
2455 | res--; | |
2456 | } | |
2457 | ||
2458 | /* word at a time for speed, use of 32-bit long okay */ | |
2459 | if (!res) { | |
2460 | /* truncation to 32-bit long okay */ | |
a5b71725 | 2461 | long mask = (long)0x0101010101010101ULL; |
302dfbeb OW |
2462 | while (i < slen) { |
2463 | xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); | |
2464 | if ((xor - mask) & ~xor & (mask << 7)) { | |
2465 | /* found the end of an nzrun within the current long */ | |
2466 | while (old_buf[i] != new_buf[i]) { | |
2467 | nzrun_len++; | |
2468 | i++; | |
2469 | } | |
2470 | break; | |
2471 | } else { | |
2472 | i += sizeof(long); | |
2473 | nzrun_len += sizeof(long); | |
2474 | } | |
2475 | } | |
2476 | } | |
2477 | ||
2478 | d += uleb128_encode_small(dst + d, nzrun_len); | |
2479 | /* overflow */ | |
2480 | if (d + nzrun_len > dlen) { | |
2481 | return -1; | |
2482 | } | |
2483 | memcpy(dst + d, nzrun_start, nzrun_len); | |
2484 | d += nzrun_len; | |
2485 | nzrun_len = 0; | |
2486 | } | |
2487 | ||
2488 | return d; | |
2489 | } | |
2490 | ||
2491 | int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) | |
2492 | { | |
2493 | int i = 0, d = 0; | |
2494 | int ret; | |
2495 | uint32_t count = 0; | |
2496 | ||
2497 | while (i < slen) { | |
2498 | ||
2499 | /* zrun */ | |
2500 | if ((slen - i) < 2) { | |
2501 | return -1; | |
2502 | } | |
2503 | ||
2504 | ret = uleb128_decode_small(src + i, &count); | |
2505 | if (ret < 0 || (i && !count)) { | |
2506 | return -1; | |
2507 | } | |
2508 | i += ret; | |
2509 | d += count; | |
2510 | ||
2511 | /* overflow */ | |
2512 | if (d > dlen) { | |
2513 | return -1; | |
2514 | } | |
2515 | ||
2516 | /* nzrun */ | |
2517 | if ((slen - i) < 2) { | |
2518 | return -1; | |
2519 | } | |
2520 | ||
2521 | ret = uleb128_decode_small(src + i, &count); | |
2522 | if (ret < 0 || !count) { | |
2523 | return -1; | |
2524 | } | |
2525 | i += ret; | |
2526 | ||
2527 | /* overflow */ | |
2528 | if (d + count > dlen || i + count > slen) { | |
2529 | return -1; | |
2530 | } | |
2531 | ||
2532 | memcpy(dst + d, src + i, count); | |
2533 | d += count; | |
2534 | i += count; | |
2535 | } | |
2536 | ||
2537 | return d; | |
2538 | } |