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aliguoria672b462008-11-11 21:33:36 +00001/*
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 */
aliguoria672b462008-11-11 21:33:36 +000024#include <unistd.h>
25#include <fcntl.h>
aliguoria672b462008-11-11 21:33:36 +000026#include <time.h>
27#include <errno.h>
28#include <sys/time.h>
29#include <zlib.h>
30
Juan Quintela71e72a12009-07-27 16:12:56 +020031/* Needed early for CONFIG_BSD etc. */
blueswir1d40cdb12009-03-07 16:52:02 +000032#include "config-host.h"
33
aliguoria672b462008-11-11 21:33:36 +000034#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>
aliguoria672b462008-11-11 21:33:36 +000044#include <arpa/inet.h>
45#include <dirent.h>
46#include <netdb.h>
47#include <sys/select.h>
Juan Quintela71e72a12009-07-27 16:12:56 +020048#ifdef CONFIG_BSD
aliguoria672b462008-11-11 21:33:36 +000049#include <sys/stat.h>
Aurelien Jarnoa167ba52009-11-29 18:00:41 +010050#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
aliguoria672b462008-11-11 21:33:36 +000051#include <libutil.h>
52#else
53#include <util.h>
54#endif
aliguoria672b462008-11-11 21:33:36 +000055#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
aliguori49dc7682009-03-08 16:26:59 +000064#include <windows.h>
aliguoria672b462008-11-11 21:33:36 +000065#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
blueswir1511d2b12009-03-07 15:32:56 +000072#include "qemu-common.h"
73#include "hw/hw.h"
Alex Williamson7685ee62010-06-25 11:09:14 -060074#include "hw/qdev.h"
blueswir1511d2b12009-03-07 15:32:56 +000075#include "net.h"
76#include "monitor.h"
77#include "sysemu.h"
78#include "qemu-timer.h"
79#include "qemu-char.h"
blueswir1511d2b12009-03-07 15:32:56 +000080#include "audio/audio.h"
81#include "migration.h"
82#include "qemu_socket.h"
Blue Swirl72cf2d42009-09-12 07:36:22 +000083#include "qemu-queue.h"
Blue Swirl17a46632011-03-27 16:05:08 +000084#include "cpus.h"
blueswir1511d2b12009-03-07 15:32:56 +000085
aliguoria672b462008-11-11 21:33:36 +000086#define SELF_ANNOUNCE_ROUNDS 5
aliguoria672b462008-11-11 21:33:36 +000087
Nolan18995b92009-10-15 16:53:55 -070088#ifndef ETH_P_RARP
Stefan Bergerf8778a72010-04-24 08:54:07 -040089#define ETH_P_RARP 0x8035
Nolan18995b92009-10-15 16:53:55 -070090#endif
91#define ARP_HTYPE_ETH 0x0001
92#define ARP_PTYPE_IP 0x0800
93#define ARP_OP_REQUEST_REV 0x3
94
95static int announce_self_create(uint8_t *buf,
aliguoria672b462008-11-11 21:33:36 +000096 uint8_t *mac_addr)
97{
Nolan18995b92009-10-15 16:53:55 -070098 /* Ethernet header. */
99 memset(buf, 0xff, 6); /* destination MAC addr */
100 memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
101 *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
aliguoria672b462008-11-11 21:33:36 +0000102
Nolan18995b92009-10-15 16:53:55 -0700103 /* RARP header. */
104 *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
105 *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
106 *(buf + 18) = 6; /* hardware addr length (ethernet) */
107 *(buf + 19) = 4; /* protocol addr length (IPv4) */
108 *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
109 memcpy(buf + 22, mac_addr, 6); /* source hw addr */
110 memset(buf + 28, 0x00, 4); /* source protocol addr */
111 memcpy(buf + 32, mac_addr, 6); /* target hw addr */
112 memset(buf + 38, 0x00, 4); /* target protocol addr */
aliguoria672b462008-11-11 21:33:36 +0000113
Nolan18995b92009-10-15 16:53:55 -0700114 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
115 memset(buf + 42, 0x00, 18);
aliguoria672b462008-11-11 21:33:36 +0000116
Nolan18995b92009-10-15 16:53:55 -0700117 return 60; /* len (FCS will be added by hardware) */
aliguoria672b462008-11-11 21:33:36 +0000118}
119
Mark McLoughlinf401ca22009-11-25 18:49:32 +0000120static void qemu_announce_self_iter(NICState *nic, void *opaque)
121{
122 uint8_t buf[60];
123 int len;
124
125 len = announce_self_create(buf, nic->conf->macaddr.a);
126
127 qemu_send_packet_raw(&nic->nc, buf, len);
128}
129
130
Gleb Natapoved8b3302009-05-21 17:17:44 +0300131static void qemu_announce_self_once(void *opaque)
aliguoria672b462008-11-11 21:33:36 +0000132{
Gleb Natapoved8b3302009-05-21 17:17:44 +0300133 static int count = SELF_ANNOUNCE_ROUNDS;
134 QEMUTimer *timer = *(QEMUTimer **)opaque;
aliguoria672b462008-11-11 21:33:36 +0000135
Mark McLoughlinf401ca22009-11-25 18:49:32 +0000136 qemu_foreach_nic(qemu_announce_self_iter, NULL);
137
Nolan18995b92009-10-15 16:53:55 -0700138 if (--count) {
139 /* delay 50ms, 150ms, 250ms, ... */
Paolo Bonzini7bd427d2011-03-11 16:47:48 +0100140 qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
Nolan18995b92009-10-15 16:53:55 -0700141 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
Gleb Natapoved8b3302009-05-21 17:17:44 +0300142 } else {
143 qemu_del_timer(timer);
144 qemu_free_timer(timer);
145 }
146}
147
148void qemu_announce_self(void)
149{
150 static QEMUTimer *timer;
Paolo Bonzini7bd427d2011-03-11 16:47:48 +0100151 timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
Gleb Natapoved8b3302009-05-21 17:17:44 +0300152 qemu_announce_self_once(&timer);
aliguoria672b462008-11-11 21:33:36 +0000153}
154
155/***********************************************************/
156/* savevm/loadvm support */
157
158#define IO_BUF_SIZE 32768
159
160struct QEMUFile {
161 QEMUFilePutBufferFunc *put_buffer;
162 QEMUFileGetBufferFunc *get_buffer;
163 QEMUFileCloseFunc *close;
164 QEMUFileRateLimit *rate_limit;
Glauber Costa19629532009-05-20 18:26:57 -0400165 QEMUFileSetRateLimit *set_rate_limit;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200166 QEMUFileGetRateLimit *get_rate_limit;
aliguoria672b462008-11-11 21:33:36 +0000167 void *opaque;
168 int is_write;
169
170 int64_t buf_offset; /* start of buffer when writing, end of buffer
171 when reading */
172 int buf_index;
173 int buf_size; /* 0 when writing */
174 uint8_t buf[IO_BUF_SIZE];
175
176 int has_error;
177};
178
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200179typedef struct QEMUFileStdio
aliguoria672b462008-11-11 21:33:36 +0000180{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200181 FILE *stdio_file;
aliguoria672b462008-11-11 21:33:36 +0000182 QEMUFile *file;
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200183} QEMUFileStdio;
aliguoria672b462008-11-11 21:33:36 +0000184
185typedef struct QEMUFileSocket
186{
187 int fd;
188 QEMUFile *file;
189} QEMUFileSocket;
190
191static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
192{
193 QEMUFileSocket *s = opaque;
194 ssize_t len;
195
196 do {
Blue Swirlc5b76b32009-06-13 08:44:31 +0000197 len = recv(s->fd, (void *)buf, size, 0);
aliguoria672b462008-11-11 21:33:36 +0000198 } while (len == -1 && socket_error() == EINTR);
199
200 if (len == -1)
201 len = -socket_error();
202
203 return len;
204}
205
206static int socket_close(void *opaque)
207{
208 QEMUFileSocket *s = opaque;
209 qemu_free(s);
210 return 0;
211}
212
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200213static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
aliguoria672b462008-11-11 21:33:36 +0000214{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200215 QEMUFileStdio *s = opaque;
216 return fwrite(buf, 1, size, s->stdio_file);
aliguoria672b462008-11-11 21:33:36 +0000217}
218
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200219static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
aliguoria672b462008-11-11 21:33:36 +0000220{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200221 QEMUFileStdio *s = opaque;
222 FILE *fp = s->stdio_file;
Uri Lublin8a67ec42009-06-08 19:27:21 +0300223 int bytes;
224
225 do {
226 clearerr(fp);
227 bytes = fread(buf, 1, size, fp);
228 } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
229 return bytes;
aliguoria672b462008-11-11 21:33:36 +0000230}
231
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200232static int stdio_pclose(void *opaque)
aliguoria672b462008-11-11 21:33:36 +0000233{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200234 QEMUFileStdio *s = opaque;
Anthony Liguori41ef56e2010-06-02 14:55:25 -0500235 int ret;
236 ret = pclose(s->stdio_file);
aliguoria672b462008-11-11 21:33:36 +0000237 qemu_free(s);
Anthony Liguori41ef56e2010-06-02 14:55:25 -0500238 return ret;
aliguoria672b462008-11-11 21:33:36 +0000239}
240
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200241static int stdio_fclose(void *opaque)
aliguoria672b462008-11-11 21:33:36 +0000242{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200243 QEMUFileStdio *s = opaque;
244 fclose(s->stdio_file);
245 qemu_free(s);
246 return 0;
247}
aliguoria672b462008-11-11 21:33:36 +0000248
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200249QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
250{
251 QEMUFileStdio *s;
252
253 if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
aliguoria672b462008-11-11 21:33:36 +0000254 fprintf(stderr, "qemu_popen: Argument validity check failed\n");
255 return NULL;
256 }
257
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200258 s = qemu_mallocz(sizeof(QEMUFileStdio));
aliguoria672b462008-11-11 21:33:36 +0000259
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200260 s->stdio_file = stdio_file;
aliguoria672b462008-11-11 21:33:36 +0000261
262 if(mode[0] == 'r') {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200263 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
264 NULL, NULL, NULL);
aliguoria672b462008-11-11 21:33:36 +0000265 } else {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200266 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
267 NULL, NULL, NULL);
aliguoria672b462008-11-11 21:33:36 +0000268 }
aliguoria672b462008-11-11 21:33:36 +0000269 return s->file;
270}
271
272QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
273{
274 FILE *popen_file;
275
276 popen_file = popen(command, mode);
277 if(popen_file == NULL) {
278 return NULL;
279 }
280
281 return qemu_popen(popen_file, mode);
282}
283
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200284int qemu_stdio_fd(QEMUFile *f)
Chris Lalancette8a43b1e2009-05-25 16:38:23 +0200285{
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200286 QEMUFileStdio *p;
Chris Lalancette8a43b1e2009-05-25 16:38:23 +0200287 int fd;
288
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200289 p = (QEMUFileStdio *)f->opaque;
290 fd = fileno(p->stdio_file);
Chris Lalancette8a43b1e2009-05-25 16:38:23 +0200291
292 return fd;
293}
294
Paolo Bonzini5ac1fad2009-08-18 15:56:25 +0200295QEMUFile *qemu_fdopen(int fd, const char *mode)
296{
297 QEMUFileStdio *s;
298
299 if (mode == NULL ||
300 (mode[0] != 'r' && mode[0] != 'w') ||
301 mode[1] != 'b' || mode[2] != 0) {
302 fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
303 return NULL;
304 }
305
306 s = qemu_mallocz(sizeof(QEMUFileStdio));
307 s->stdio_file = fdopen(fd, mode);
308 if (!s->stdio_file)
309 goto fail;
310
311 if(mode[0] == 'r') {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200312 s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
313 NULL, NULL, NULL);
Paolo Bonzini5ac1fad2009-08-18 15:56:25 +0200314 } else {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200315 s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
316 NULL, NULL, NULL);
Paolo Bonzini5ac1fad2009-08-18 15:56:25 +0200317 }
318 return s->file;
319
320fail:
321 qemu_free(s);
322 return NULL;
323}
324
aliguoria672b462008-11-11 21:33:36 +0000325QEMUFile *qemu_fopen_socket(int fd)
326{
327 QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
328
aliguoria672b462008-11-11 21:33:36 +0000329 s->fd = fd;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200330 s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
331 NULL, NULL, NULL);
aliguoria672b462008-11-11 21:33:36 +0000332 return s->file;
333}
334
aliguoria672b462008-11-11 21:33:36 +0000335static int file_put_buffer(void *opaque, const uint8_t *buf,
336 int64_t pos, int size)
337{
338 QEMUFileStdio *s = opaque;
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200339 fseek(s->stdio_file, pos, SEEK_SET);
Kirill A. Shutemov5fdb3aa2009-12-25 18:19:19 +0000340 return fwrite(buf, 1, size, s->stdio_file);
aliguoria672b462008-11-11 21:33:36 +0000341}
342
343static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
344{
345 QEMUFileStdio *s = opaque;
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200346 fseek(s->stdio_file, pos, SEEK_SET);
347 return fread(buf, 1, size, s->stdio_file);
aliguoria672b462008-11-11 21:33:36 +0000348}
349
350QEMUFile *qemu_fopen(const char *filename, const char *mode)
351{
352 QEMUFileStdio *s;
353
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200354 if (mode == NULL ||
355 (mode[0] != 'r' && mode[0] != 'w') ||
356 mode[1] != 'b' || mode[2] != 0) {
Blue Swirl090414a2010-03-13 11:36:09 +0000357 fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200358 return NULL;
359 }
360
aliguoria672b462008-11-11 21:33:36 +0000361 s = qemu_mallocz(sizeof(QEMUFileStdio));
aliguoria672b462008-11-11 21:33:36 +0000362
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200363 s->stdio_file = fopen(filename, mode);
364 if (!s->stdio_file)
aliguoria672b462008-11-11 21:33:36 +0000365 goto fail;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200366
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200367 if(mode[0] == 'w') {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200368 s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
369 NULL, NULL, NULL);
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200370 } else {
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200371 s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
372 NULL, NULL, NULL);
Paolo Bonzini7f79dd22009-08-12 14:17:35 +0200373 }
374 return s->file;
aliguoria672b462008-11-11 21:33:36 +0000375fail:
aliguoria672b462008-11-11 21:33:36 +0000376 qemu_free(s);
377 return NULL;
378}
379
aliguori178e08a2009-04-05 19:10:55 +0000380static int block_put_buffer(void *opaque, const uint8_t *buf,
aliguoria672b462008-11-11 21:33:36 +0000381 int64_t pos, int size)
382{
Christoph Hellwig45566e92009-07-10 23:11:57 +0200383 bdrv_save_vmstate(opaque, buf, pos, size);
aliguoria672b462008-11-11 21:33:36 +0000384 return size;
385}
386
aliguori178e08a2009-04-05 19:10:55 +0000387static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
aliguoria672b462008-11-11 21:33:36 +0000388{
Christoph Hellwig45566e92009-07-10 23:11:57 +0200389 return bdrv_load_vmstate(opaque, buf, pos, size);
aliguoria672b462008-11-11 21:33:36 +0000390}
391
392static int bdrv_fclose(void *opaque)
393{
aliguoria672b462008-11-11 21:33:36 +0000394 return 0;
395}
396
Christoph Hellwig45566e92009-07-10 23:11:57 +0200397static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
aliguoria672b462008-11-11 21:33:36 +0000398{
aliguoria672b462008-11-11 21:33:36 +0000399 if (is_writable)
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200400 return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
401 NULL, NULL, NULL);
402 return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL);
aliguoria672b462008-11-11 21:33:36 +0000403}
404
405QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
406 QEMUFileGetBufferFunc *get_buffer,
407 QEMUFileCloseFunc *close,
Glauber Costa19629532009-05-20 18:26:57 -0400408 QEMUFileRateLimit *rate_limit,
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200409 QEMUFileSetRateLimit *set_rate_limit,
410 QEMUFileGetRateLimit *get_rate_limit)
aliguoria672b462008-11-11 21:33:36 +0000411{
412 QEMUFile *f;
413
414 f = qemu_mallocz(sizeof(QEMUFile));
aliguoria672b462008-11-11 21:33:36 +0000415
416 f->opaque = opaque;
417 f->put_buffer = put_buffer;
418 f->get_buffer = get_buffer;
419 f->close = close;
420 f->rate_limit = rate_limit;
Glauber Costa19629532009-05-20 18:26:57 -0400421 f->set_rate_limit = set_rate_limit;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200422 f->get_rate_limit = get_rate_limit;
aliguoria672b462008-11-11 21:33:36 +0000423 f->is_write = 0;
424
425 return f;
426}
427
428int qemu_file_has_error(QEMUFile *f)
429{
430 return f->has_error;
431}
432
aliguori4dabe242009-04-05 19:30:51 +0000433void qemu_file_set_error(QEMUFile *f)
434{
435 f->has_error = 1;
436}
437
aliguoria672b462008-11-11 21:33:36 +0000438void qemu_fflush(QEMUFile *f)
439{
440 if (!f->put_buffer)
441 return;
442
443 if (f->is_write && f->buf_index > 0) {
444 int len;
445
446 len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
447 if (len > 0)
448 f->buf_offset += f->buf_index;
449 else
450 f->has_error = 1;
451 f->buf_index = 0;
452 }
453}
454
455static void qemu_fill_buffer(QEMUFile *f)
456{
457 int len;
458
459 if (!f->get_buffer)
460 return;
461
462 if (f->is_write)
463 abort();
464
465 len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
466 if (len > 0) {
467 f->buf_index = 0;
468 f->buf_size = len;
469 f->buf_offset += len;
470 } else if (len != -EAGAIN)
471 f->has_error = 1;
472}
473
474int qemu_fclose(QEMUFile *f)
475{
476 int ret = 0;
477 qemu_fflush(f);
478 if (f->close)
479 ret = f->close(f->opaque);
480 qemu_free(f);
481 return ret;
482}
483
484void qemu_file_put_notify(QEMUFile *f)
485{
486 f->put_buffer(f->opaque, NULL, 0, 0);
487}
488
489void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
490{
491 int l;
492
493 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
494 fprintf(stderr,
495 "Attempted to write to buffer while read buffer is not empty\n");
496 abort();
497 }
498
499 while (!f->has_error && size > 0) {
500 l = IO_BUF_SIZE - f->buf_index;
501 if (l > size)
502 l = size;
503 memcpy(f->buf + f->buf_index, buf, l);
504 f->is_write = 1;
505 f->buf_index += l;
506 buf += l;
507 size -= l;
508 if (f->buf_index >= IO_BUF_SIZE)
509 qemu_fflush(f);
510 }
511}
512
513void qemu_put_byte(QEMUFile *f, int v)
514{
515 if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
516 fprintf(stderr,
517 "Attempted to write to buffer while read buffer is not empty\n");
518 abort();
519 }
520
521 f->buf[f->buf_index++] = v;
522 f->is_write = 1;
523 if (f->buf_index >= IO_BUF_SIZE)
524 qemu_fflush(f);
525}
526
527int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
528{
529 int size, l;
530
531 if (f->is_write)
532 abort();
533
534 size = size1;
535 while (size > 0) {
536 l = f->buf_size - f->buf_index;
537 if (l == 0) {
538 qemu_fill_buffer(f);
539 l = f->buf_size - f->buf_index;
540 if (l == 0)
541 break;
542 }
543 if (l > size)
544 l = size;
545 memcpy(buf, f->buf + f->buf_index, l);
546 f->buf_index += l;
547 buf += l;
548 size -= l;
549 }
550 return size1 - size;
551}
552
Juan Quintela811814b2010-07-26 21:38:43 +0200553static int qemu_peek_byte(QEMUFile *f)
554{
555 if (f->is_write)
556 abort();
557
558 if (f->buf_index >= f->buf_size) {
559 qemu_fill_buffer(f);
560 if (f->buf_index >= f->buf_size)
561 return 0;
562 }
563 return f->buf[f->buf_index];
564}
565
aliguoria672b462008-11-11 21:33:36 +0000566int qemu_get_byte(QEMUFile *f)
567{
568 if (f->is_write)
569 abort();
570
571 if (f->buf_index >= f->buf_size) {
572 qemu_fill_buffer(f);
573 if (f->buf_index >= f->buf_size)
574 return 0;
575 }
576 return f->buf[f->buf_index++];
577}
578
579int64_t qemu_ftell(QEMUFile *f)
580{
581 return f->buf_offset - f->buf_size + f->buf_index;
582}
583
584int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
585{
586 if (whence == SEEK_SET) {
587 /* nothing to do */
588 } else if (whence == SEEK_CUR) {
589 pos += qemu_ftell(f);
590 } else {
591 /* SEEK_END not supported */
592 return -1;
593 }
594 if (f->put_buffer) {
595 qemu_fflush(f);
596 f->buf_offset = pos;
597 } else {
598 f->buf_offset = pos;
599 f->buf_index = 0;
600 f->buf_size = 0;
601 }
602 return pos;
603}
604
605int qemu_file_rate_limit(QEMUFile *f)
606{
607 if (f->rate_limit)
608 return f->rate_limit(f->opaque);
609
610 return 0;
611}
612
Michael S. Tsirkin3d002df2010-11-23 19:05:54 +0200613int64_t qemu_file_get_rate_limit(QEMUFile *f)
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +0200614{
615 if (f->get_rate_limit)
616 return f->get_rate_limit(f->opaque);
617
618 return 0;
619}
620
Michael S. Tsirkin3d002df2010-11-23 19:05:54 +0200621int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate)
Glauber Costa19629532009-05-20 18:26:57 -0400622{
Glauber Costa0bb05ea2009-07-14 18:26:51 -0400623 /* any failed or completed migration keeps its state to allow probing of
624 * migration data, but has no associated file anymore */
625 if (f && f->set_rate_limit)
Glauber Costa19629532009-05-20 18:26:57 -0400626 return f->set_rate_limit(f->opaque, new_rate);
627
628 return 0;
629}
630
aliguoria672b462008-11-11 21:33:36 +0000631void qemu_put_be16(QEMUFile *f, unsigned int v)
632{
633 qemu_put_byte(f, v >> 8);
634 qemu_put_byte(f, v);
635}
636
637void qemu_put_be32(QEMUFile *f, unsigned int v)
638{
639 qemu_put_byte(f, v >> 24);
640 qemu_put_byte(f, v >> 16);
641 qemu_put_byte(f, v >> 8);
642 qemu_put_byte(f, v);
643}
644
645void qemu_put_be64(QEMUFile *f, uint64_t v)
646{
647 qemu_put_be32(f, v >> 32);
648 qemu_put_be32(f, v);
649}
650
651unsigned int qemu_get_be16(QEMUFile *f)
652{
653 unsigned int v;
654 v = qemu_get_byte(f) << 8;
655 v |= qemu_get_byte(f);
656 return v;
657}
658
659unsigned int qemu_get_be32(QEMUFile *f)
660{
661 unsigned int v;
662 v = qemu_get_byte(f) << 24;
663 v |= qemu_get_byte(f) << 16;
664 v |= qemu_get_byte(f) << 8;
665 v |= qemu_get_byte(f);
666 return v;
667}
668
669uint64_t qemu_get_be64(QEMUFile *f)
670{
671 uint64_t v;
672 v = (uint64_t)qemu_get_be32(f) << 32;
673 v |= qemu_get_be32(f);
674 return v;
675}
676
Gerd Hoffmanncdae5cf2010-11-01 15:51:54 +0100677/* bool */
678
679static int get_bool(QEMUFile *f, void *pv, size_t size)
680{
681 bool *v = pv;
682 *v = qemu_get_byte(f);
683 return 0;
684}
685
686static void put_bool(QEMUFile *f, void *pv, size_t size)
687{
688 bool *v = pv;
689 qemu_put_byte(f, *v);
690}
691
692const VMStateInfo vmstate_info_bool = {
693 .name = "bool",
694 .get = get_bool,
695 .put = put_bool,
696};
697
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200698/* 8 bit int */
699
700static int get_int8(QEMUFile *f, void *pv, size_t size)
701{
702 int8_t *v = pv;
703 qemu_get_s8s(f, v);
704 return 0;
705}
706
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200707static void put_int8(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200708{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200709 int8_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200710 qemu_put_s8s(f, v);
711}
712
713const VMStateInfo vmstate_info_int8 = {
714 .name = "int8",
715 .get = get_int8,
716 .put = put_int8,
717};
718
719/* 16 bit int */
720
721static int get_int16(QEMUFile *f, void *pv, size_t size)
722{
723 int16_t *v = pv;
724 qemu_get_sbe16s(f, v);
725 return 0;
726}
727
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200728static void put_int16(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200729{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200730 int16_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200731 qemu_put_sbe16s(f, v);
732}
733
734const VMStateInfo vmstate_info_int16 = {
735 .name = "int16",
736 .get = get_int16,
737 .put = put_int16,
738};
739
740/* 32 bit int */
741
742static int get_int32(QEMUFile *f, void *pv, size_t size)
743{
744 int32_t *v = pv;
745 qemu_get_sbe32s(f, v);
746 return 0;
747}
748
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200749static void put_int32(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200750{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200751 int32_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200752 qemu_put_sbe32s(f, v);
753}
754
755const VMStateInfo vmstate_info_int32 = {
756 .name = "int32",
757 .get = get_int32,
758 .put = put_int32,
759};
760
Juan Quintela82501662009-08-20 19:42:32 +0200761/* 32 bit int. See that the received value is the same than the one
762 in the field */
763
764static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
765{
766 int32_t *v = pv;
767 int32_t v2;
768 qemu_get_sbe32s(f, &v2);
769
770 if (*v == v2)
771 return 0;
772 return -EINVAL;
773}
774
775const VMStateInfo vmstate_info_int32_equal = {
776 .name = "int32 equal",
777 .get = get_int32_equal,
778 .put = put_int32,
779};
780
Juan Quintela0a031e02009-08-20 19:42:37 +0200781/* 32 bit int. See that the received value is the less or the same
782 than the one in the field */
783
784static int get_int32_le(QEMUFile *f, void *pv, size_t size)
785{
786 int32_t *old = pv;
787 int32_t new;
788 qemu_get_sbe32s(f, &new);
789
790 if (*old <= new)
791 return 0;
792 return -EINVAL;
793}
794
795const VMStateInfo vmstate_info_int32_le = {
796 .name = "int32 equal",
797 .get = get_int32_le,
798 .put = put_int32,
799};
800
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200801/* 64 bit int */
802
803static int get_int64(QEMUFile *f, void *pv, size_t size)
804{
805 int64_t *v = pv;
806 qemu_get_sbe64s(f, v);
807 return 0;
808}
809
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200810static void put_int64(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200811{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200812 int64_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200813 qemu_put_sbe64s(f, v);
814}
815
816const VMStateInfo vmstate_info_int64 = {
817 .name = "int64",
818 .get = get_int64,
819 .put = put_int64,
820};
821
822/* 8 bit unsigned int */
823
824static int get_uint8(QEMUFile *f, void *pv, size_t size)
825{
826 uint8_t *v = pv;
827 qemu_get_8s(f, v);
828 return 0;
829}
830
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200831static void put_uint8(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200832{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200833 uint8_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200834 qemu_put_8s(f, v);
835}
836
837const VMStateInfo vmstate_info_uint8 = {
838 .name = "uint8",
839 .get = get_uint8,
840 .put = put_uint8,
841};
842
843/* 16 bit unsigned int */
844
845static int get_uint16(QEMUFile *f, void *pv, size_t size)
846{
847 uint16_t *v = pv;
848 qemu_get_be16s(f, v);
849 return 0;
850}
851
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200852static void put_uint16(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200853{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200854 uint16_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200855 qemu_put_be16s(f, v);
856}
857
858const VMStateInfo vmstate_info_uint16 = {
859 .name = "uint16",
860 .get = get_uint16,
861 .put = put_uint16,
862};
863
864/* 32 bit unsigned int */
865
866static int get_uint32(QEMUFile *f, void *pv, size_t size)
867{
868 uint32_t *v = pv;
869 qemu_get_be32s(f, v);
870 return 0;
871}
872
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200873static void put_uint32(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200874{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200875 uint32_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200876 qemu_put_be32s(f, v);
877}
878
879const VMStateInfo vmstate_info_uint32 = {
880 .name = "uint32",
881 .get = get_uint32,
882 .put = put_uint32,
883};
884
Juan Quintela9122a8f2011-03-10 12:33:48 +0100885/* 32 bit uint. See that the received value is the same than the one
886 in the field */
887
888static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
889{
890 uint32_t *v = pv;
891 uint32_t v2;
892 qemu_get_be32s(f, &v2);
893
894 if (*v == v2) {
895 return 0;
896 }
897 return -EINVAL;
898}
899
900const VMStateInfo vmstate_info_uint32_equal = {
901 .name = "uint32 equal",
902 .get = get_uint32_equal,
903 .put = put_uint32,
904};
905
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200906/* 64 bit unsigned int */
907
908static int get_uint64(QEMUFile *f, void *pv, size_t size)
909{
910 uint64_t *v = pv;
911 qemu_get_be64s(f, v);
912 return 0;
913}
914
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200915static void put_uint64(QEMUFile *f, void *pv, size_t size)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200916{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200917 uint64_t *v = pv;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +0200918 qemu_put_be64s(f, v);
919}
920
921const VMStateInfo vmstate_info_uint64 = {
922 .name = "uint64",
923 .get = get_uint64,
924 .put = put_uint64,
925};
926
Juan Quintela80cd83e2009-09-10 03:04:36 +0200927/* 8 bit int. See that the received value is the same than the one
928 in the field */
929
930static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
931{
932 uint8_t *v = pv;
933 uint8_t v2;
934 qemu_get_8s(f, &v2);
935
936 if (*v == v2)
937 return 0;
938 return -EINVAL;
939}
940
941const VMStateInfo vmstate_info_uint8_equal = {
Juan Quintelaaa1cce62009-10-15 19:16:06 +0200942 .name = "uint8 equal",
Juan Quintela80cd83e2009-09-10 03:04:36 +0200943 .get = get_uint8_equal,
944 .put = put_uint8,
945};
946
Juan Quinteladc3b83a2009-10-15 23:16:13 +0200947/* 16 bit unsigned int int. See that the received value is the same than the one
948 in the field */
949
950static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
951{
952 uint16_t *v = pv;
953 uint16_t v2;
954 qemu_get_be16s(f, &v2);
955
956 if (*v == v2)
957 return 0;
958 return -EINVAL;
959}
960
961const VMStateInfo vmstate_info_uint16_equal = {
962 .name = "uint16 equal",
963 .get = get_uint16_equal,
964 .put = put_uint16,
965};
966
Juan Quinteladde04632009-08-20 19:42:26 +0200967/* timers */
968
969static int get_timer(QEMUFile *f, void *pv, size_t size)
970{
971 QEMUTimer *v = pv;
972 qemu_get_timer(f, v);
973 return 0;
974}
975
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200976static void put_timer(QEMUFile *f, void *pv, size_t size)
Juan Quinteladde04632009-08-20 19:42:26 +0200977{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200978 QEMUTimer *v = pv;
Juan Quinteladde04632009-08-20 19:42:26 +0200979 qemu_put_timer(f, v);
980}
981
982const VMStateInfo vmstate_info_timer = {
983 .name = "timer",
984 .get = get_timer,
985 .put = put_timer,
986};
987
Juan Quintela6f67c502009-08-20 19:42:35 +0200988/* uint8_t buffers */
989
990static int get_buffer(QEMUFile *f, void *pv, size_t size)
991{
992 uint8_t *v = pv;
993 qemu_get_buffer(f, v, size);
994 return 0;
995}
996
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200997static void put_buffer(QEMUFile *f, void *pv, size_t size)
Juan Quintela6f67c502009-08-20 19:42:35 +0200998{
Juan Quintela84e2e3e2009-09-29 22:48:20 +0200999 uint8_t *v = pv;
Juan Quintela6f67c502009-08-20 19:42:35 +02001000 qemu_put_buffer(f, v, size);
1001}
1002
1003const VMStateInfo vmstate_info_buffer = {
1004 .name = "buffer",
1005 .get = get_buffer,
1006 .put = put_buffer,
1007};
1008
Juan Quintela76507c72009-10-19 15:46:28 +02001009/* unused buffers: space that was used for some fields that are
Stefan Weil61cc8702011-04-13 22:45:22 +02001010 not useful anymore */
Juan Quintela76507c72009-10-19 15:46:28 +02001011
1012static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
1013{
Jan Kiszka21174c32009-12-02 12:36:35 +01001014 uint8_t buf[1024];
1015 int block_len;
1016
1017 while (size > 0) {
1018 block_len = MIN(sizeof(buf), size);
1019 size -= block_len;
1020 qemu_get_buffer(f, buf, block_len);
1021 }
1022 return 0;
Juan Quintela76507c72009-10-19 15:46:28 +02001023}
1024
1025static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
1026{
Jan Kiszka21174c32009-12-02 12:36:35 +01001027 static const uint8_t buf[1024];
1028 int block_len;
1029
1030 while (size > 0) {
1031 block_len = MIN(sizeof(buf), size);
1032 size -= block_len;
1033 qemu_put_buffer(f, buf, block_len);
1034 }
Juan Quintela76507c72009-10-19 15:46:28 +02001035}
1036
1037const VMStateInfo vmstate_info_unused_buffer = {
1038 .name = "unused_buffer",
1039 .get = get_unused_buffer,
1040 .put = put_unused_buffer,
1041};
1042
Alex Williamson7685ee62010-06-25 11:09:14 -06001043typedef struct CompatEntry {
1044 char idstr[256];
1045 int instance_id;
1046} CompatEntry;
1047
aliguoria672b462008-11-11 21:33:36 +00001048typedef struct SaveStateEntry {
Blue Swirl72cf2d42009-09-12 07:36:22 +00001049 QTAILQ_ENTRY(SaveStateEntry) entry;
aliguoria672b462008-11-11 21:33:36 +00001050 char idstr[256];
1051 int instance_id;
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001052 int alias_id;
aliguoria672b462008-11-11 21:33:36 +00001053 int version_id;
1054 int section_id;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001055 SaveSetParamsHandler *set_params;
aliguoria672b462008-11-11 21:33:36 +00001056 SaveLiveStateHandler *save_live_state;
1057 SaveStateHandler *save_state;
1058 LoadStateHandler *load_state;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001059 const VMStateDescription *vmsd;
aliguoria672b462008-11-11 21:33:36 +00001060 void *opaque;
Alex Williamson7685ee62010-06-25 11:09:14 -06001061 CompatEntry *compat;
Cam Macdonell24312962010-07-26 18:11:00 -06001062 int no_migrate;
aliguoria672b462008-11-11 21:33:36 +00001063} SaveStateEntry;
1064
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001065
Blue Swirl72cf2d42009-09-12 07:36:22 +00001066static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
1067 QTAILQ_HEAD_INITIALIZER(savevm_handlers);
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001068static int global_section_id;
aliguoria672b462008-11-11 21:33:36 +00001069
Juan Quintela8718e992009-09-01 02:12:31 +02001070static int calculate_new_instance_id(const char *idstr)
1071{
1072 SaveStateEntry *se;
1073 int instance_id = 0;
1074
Blue Swirl72cf2d42009-09-12 07:36:22 +00001075 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
Juan Quintela8718e992009-09-01 02:12:31 +02001076 if (strcmp(idstr, se->idstr) == 0
1077 && instance_id <= se->instance_id) {
1078 instance_id = se->instance_id + 1;
1079 }
1080 }
1081 return instance_id;
1082}
1083
Alex Williamson7685ee62010-06-25 11:09:14 -06001084static int calculate_compat_instance_id(const char *idstr)
1085{
1086 SaveStateEntry *se;
1087 int instance_id = 0;
1088
1089 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1090 if (!se->compat)
1091 continue;
1092
1093 if (strcmp(idstr, se->compat->idstr) == 0
1094 && instance_id <= se->compat->instance_id) {
1095 instance_id = se->compat->instance_id + 1;
1096 }
1097 }
1098 return instance_id;
1099}
1100
aliguoria672b462008-11-11 21:33:36 +00001101/* TODO: Individual devices generally have very little idea about the rest
1102 of the system, so instance_id should be removed/replaced.
1103 Meanwhile pass -1 as instance_id if you do not already have a clearly
1104 distinguishing id for all instances of your device class. */
Alex Williamson0be71e32010-06-25 11:09:07 -06001105int register_savevm_live(DeviceState *dev,
1106 const char *idstr,
aliguoria672b462008-11-11 21:33:36 +00001107 int instance_id,
1108 int version_id,
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001109 SaveSetParamsHandler *set_params,
aliguoria672b462008-11-11 21:33:36 +00001110 SaveLiveStateHandler *save_live_state,
1111 SaveStateHandler *save_state,
1112 LoadStateHandler *load_state,
1113 void *opaque)
1114{
Juan Quintela8718e992009-09-01 02:12:31 +02001115 SaveStateEntry *se;
aliguoria672b462008-11-11 21:33:36 +00001116
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001117 se = qemu_mallocz(sizeof(SaveStateEntry));
aliguoria672b462008-11-11 21:33:36 +00001118 se->version_id = version_id;
1119 se->section_id = global_section_id++;
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001120 se->set_params = set_params;
aliguoria672b462008-11-11 21:33:36 +00001121 se->save_live_state = save_live_state;
1122 se->save_state = save_state;
1123 se->load_state = load_state;
1124 se->opaque = opaque;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001125 se->vmsd = NULL;
Cam Macdonell24312962010-07-26 18:11:00 -06001126 se->no_migrate = 0;
aliguoria672b462008-11-11 21:33:36 +00001127
Alex Williamson7685ee62010-06-25 11:09:14 -06001128 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1129 char *id = dev->parent_bus->info->get_dev_path(dev);
1130 if (id) {
1131 pstrcpy(se->idstr, sizeof(se->idstr), id);
1132 pstrcat(se->idstr, sizeof(se->idstr), "/");
1133 qemu_free(id);
1134
1135 se->compat = qemu_mallocz(sizeof(CompatEntry));
1136 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
1137 se->compat->instance_id = instance_id == -1 ?
1138 calculate_compat_instance_id(idstr) : instance_id;
1139 instance_id = -1;
1140 }
1141 }
1142 pstrcat(se->idstr, sizeof(se->idstr), idstr);
1143
Juan Quintela8718e992009-09-01 02:12:31 +02001144 if (instance_id == -1) {
Alex Williamson7685ee62010-06-25 11:09:14 -06001145 se->instance_id = calculate_new_instance_id(se->idstr);
Juan Quintela8718e992009-09-01 02:12:31 +02001146 } else {
1147 se->instance_id = instance_id;
aliguoria672b462008-11-11 21:33:36 +00001148 }
Alex Williamson7685ee62010-06-25 11:09:14 -06001149 assert(!se->compat || se->instance_id == 0);
Juan Quintela8718e992009-09-01 02:12:31 +02001150 /* add at the end of list */
Blue Swirl72cf2d42009-09-12 07:36:22 +00001151 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
aliguoria672b462008-11-11 21:33:36 +00001152 return 0;
1153}
1154
Alex Williamson0be71e32010-06-25 11:09:07 -06001155int register_savevm(DeviceState *dev,
1156 const char *idstr,
aliguoria672b462008-11-11 21:33:36 +00001157 int instance_id,
1158 int version_id,
1159 SaveStateHandler *save_state,
1160 LoadStateHandler *load_state,
1161 void *opaque)
1162{
Alex Williamson0be71e32010-06-25 11:09:07 -06001163 return register_savevm_live(dev, idstr, instance_id, version_id,
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001164 NULL, NULL, save_state, load_state, opaque);
aliguoria672b462008-11-11 21:33:36 +00001165}
1166
Alex Williamson0be71e32010-06-25 11:09:07 -06001167void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
aliguori41bd13a2009-04-17 17:10:59 +00001168{
Juan Quintela8718e992009-09-01 02:12:31 +02001169 SaveStateEntry *se, *new_se;
Alex Williamson7685ee62010-06-25 11:09:14 -06001170 char id[256] = "";
1171
1172 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1173 char *path = dev->parent_bus->info->get_dev_path(dev);
1174 if (path) {
1175 pstrcpy(id, sizeof(id), path);
1176 pstrcat(id, sizeof(id), "/");
1177 qemu_free(path);
1178 }
1179 }
1180 pstrcat(id, sizeof(id), idstr);
aliguori41bd13a2009-04-17 17:10:59 +00001181
Blue Swirl72cf2d42009-09-12 07:36:22 +00001182 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
Alex Williamson7685ee62010-06-25 11:09:14 -06001183 if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
Blue Swirl72cf2d42009-09-12 07:36:22 +00001184 QTAILQ_REMOVE(&savevm_handlers, se, entry);
Alex Williamson69e58af2010-07-21 08:35:31 -06001185 if (se->compat) {
1186 qemu_free(se->compat);
1187 }
Juan Quintela8718e992009-09-01 02:12:31 +02001188 qemu_free(se);
aliguori41bd13a2009-04-17 17:10:59 +00001189 }
aliguori41bd13a2009-04-17 17:10:59 +00001190 }
1191}
1192
Cam Macdonell24312962010-07-26 18:11:00 -06001193/* mark a device as not to be migrated, that is the device should be
1194 unplugged before migration */
1195void register_device_unmigratable(DeviceState *dev, const char *idstr,
1196 void *opaque)
1197{
1198 SaveStateEntry *se;
1199 char id[256] = "";
1200
1201 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1202 char *path = dev->parent_bus->info->get_dev_path(dev);
1203 if (path) {
1204 pstrcpy(id, sizeof(id), path);
1205 pstrcat(id, sizeof(id), "/");
1206 qemu_free(path);
1207 }
1208 }
1209 pstrcat(id, sizeof(id), idstr);
1210
1211 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1212 if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
1213 se->no_migrate = 1;
1214 }
1215 }
1216}
1217
Alex Williamson0be71e32010-06-25 11:09:07 -06001218int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001219 const VMStateDescription *vmsd,
1220 void *opaque, int alias_id,
1221 int required_for_version)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001222{
Juan Quintela8718e992009-09-01 02:12:31 +02001223 SaveStateEntry *se;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001224
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001225 /* If this triggers, alias support can be dropped for the vmsd. */
1226 assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
1227
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001228 se = qemu_mallocz(sizeof(SaveStateEntry));
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001229 se->version_id = vmsd->version_id;
1230 se->section_id = global_section_id++;
1231 se->save_live_state = NULL;
1232 se->save_state = NULL;
1233 se->load_state = NULL;
1234 se->opaque = opaque;
1235 se->vmsd = vmsd;
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001236 se->alias_id = alias_id;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001237
Alex Williamson7685ee62010-06-25 11:09:14 -06001238 if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
1239 char *id = dev->parent_bus->info->get_dev_path(dev);
1240 if (id) {
1241 pstrcpy(se->idstr, sizeof(se->idstr), id);
1242 pstrcat(se->idstr, sizeof(se->idstr), "/");
1243 qemu_free(id);
1244
1245 se->compat = qemu_mallocz(sizeof(CompatEntry));
1246 pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
1247 se->compat->instance_id = instance_id == -1 ?
1248 calculate_compat_instance_id(vmsd->name) : instance_id;
1249 instance_id = -1;
1250 }
1251 }
1252 pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
1253
Juan Quintela8718e992009-09-01 02:12:31 +02001254 if (instance_id == -1) {
Alex Williamson7685ee62010-06-25 11:09:14 -06001255 se->instance_id = calculate_new_instance_id(se->idstr);
Juan Quintela8718e992009-09-01 02:12:31 +02001256 } else {
1257 se->instance_id = instance_id;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001258 }
Alex Williamson7685ee62010-06-25 11:09:14 -06001259 assert(!se->compat || se->instance_id == 0);
Juan Quintela8718e992009-09-01 02:12:31 +02001260 /* add at the end of list */
Blue Swirl72cf2d42009-09-12 07:36:22 +00001261 QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001262 return 0;
1263}
1264
Alex Williamson0be71e32010-06-25 11:09:07 -06001265int vmstate_register(DeviceState *dev, int instance_id,
1266 const VMStateDescription *vmsd, void *opaque)
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001267{
Alex Williamson0be71e32010-06-25 11:09:07 -06001268 return vmstate_register_with_alias_id(dev, instance_id, vmsd,
1269 opaque, -1, 0);
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001270}
1271
Alex Williamson0be71e32010-06-25 11:09:07 -06001272void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
1273 void *opaque)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001274{
Juan Quintela1eb75382009-09-10 03:04:29 +02001275 SaveStateEntry *se, *new_se;
1276
Blue Swirl72cf2d42009-09-12 07:36:22 +00001277 QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
Juan Quintela1eb75382009-09-10 03:04:29 +02001278 if (se->vmsd == vmsd && se->opaque == opaque) {
Blue Swirl72cf2d42009-09-12 07:36:22 +00001279 QTAILQ_REMOVE(&savevm_handlers, se, entry);
Alex Williamson69e58af2010-07-21 08:35:31 -06001280 if (se->compat) {
1281 qemu_free(se->compat);
1282 }
Juan Quintela1eb75382009-09-10 03:04:29 +02001283 qemu_free(se);
1284 }
1285 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001286}
1287
Juan Quintela811814b2010-07-26 21:38:43 +02001288static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1289 void *opaque);
1290static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1291 void *opaque);
1292
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001293int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
1294 void *opaque, int version_id)
1295{
1296 VMStateField *field = vmsd->fields;
Juan Quintela811814b2010-07-26 21:38:43 +02001297 int ret;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001298
1299 if (version_id > vmsd->version_id) {
1300 return -EINVAL;
1301 }
1302 if (version_id < vmsd->minimum_version_id_old) {
1303 return -EINVAL;
1304 }
1305 if (version_id < vmsd->minimum_version_id) {
1306 return vmsd->load_state_old(f, opaque, version_id);
1307 }
Juan Quintelafd4d52d2009-09-10 03:04:31 +02001308 if (vmsd->pre_load) {
1309 int ret = vmsd->pre_load(opaque);
1310 if (ret)
1311 return ret;
1312 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001313 while(field->name) {
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001314 if ((field->field_exists &&
1315 field->field_exists(opaque, version_id)) ||
1316 (!field->field_exists &&
1317 field->version_id <= version_id)) {
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001318 void *base_addr = opaque + field->offset;
Juan Quintela811814b2010-07-26 21:38:43 +02001319 int i, n_elems = 1;
Juan Quintelae61a1e02009-12-02 12:36:38 +01001320 int size = field->size;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001321
Juan Quintelae61a1e02009-12-02 12:36:38 +01001322 if (field->flags & VMS_VBUFFER) {
1323 size = *(int32_t *)(opaque+field->size_offset);
Juan Quintela33599e22009-12-02 12:36:43 +01001324 if (field->flags & VMS_MULTIPLY) {
1325 size *= field->size;
1326 }
Juan Quintelae61a1e02009-12-02 12:36:38 +01001327 }
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001328 if (field->flags & VMS_ARRAY) {
1329 n_elems = field->num;
Juan Quintelad6698282009-10-16 11:27:17 +02001330 } else if (field->flags & VMS_VARRAY_INT32) {
1331 n_elems = *(int32_t *)(opaque+field->num_offset);
Juan Quintelaa624b082011-03-10 12:33:50 +01001332 } else if (field->flags & VMS_VARRAY_UINT32) {
1333 n_elems = *(uint32_t *)(opaque+field->num_offset);
Juan Quintelabdb49412009-10-16 11:35:18 +02001334 } else if (field->flags & VMS_VARRAY_UINT16) {
1335 n_elems = *(uint16_t *)(opaque+field->num_offset);
Juan Quintela82fa39b2011-03-10 12:33:49 +01001336 } else if (field->flags & VMS_VARRAY_UINT8) {
1337 n_elems = *(uint8_t *)(opaque+field->num_offset);
Juan Quinteladde04632009-08-20 19:42:26 +02001338 }
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001339 if (field->flags & VMS_POINTER) {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001340 base_addr = *(void **)base_addr + field->start;
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001341 }
1342 for (i = 0; i < n_elems; i++) {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001343 void *addr = base_addr + size * i;
Juan Quintelaec245e22009-08-20 19:42:29 +02001344
Juan Quintela19df4382009-09-29 22:48:41 +02001345 if (field->flags & VMS_ARRAY_OF_POINTER) {
1346 addr = *(void **)addr;
1347 }
Juan Quintelaec245e22009-08-20 19:42:29 +02001348 if (field->flags & VMS_STRUCT) {
Juan Quintelafa3aad22009-08-28 15:28:25 +02001349 ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
Juan Quintelaec245e22009-08-20 19:42:29 +02001350 } else {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001351 ret = field->info->get(f, addr, size);
Juan Quintelaec245e22009-08-20 19:42:29 +02001352
1353 }
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001354 if (ret < 0) {
1355 return ret;
1356 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001357 }
1358 }
1359 field++;
1360 }
Juan Quintela811814b2010-07-26 21:38:43 +02001361 ret = vmstate_subsection_load(f, vmsd, opaque);
1362 if (ret != 0) {
1363 return ret;
1364 }
Juan Quintela752ff2f2009-09-10 03:04:30 +02001365 if (vmsd->post_load) {
Juan Quintelae59fb372009-09-29 22:48:21 +02001366 return vmsd->post_load(opaque, version_id);
Juan Quintela752ff2f2009-09-10 03:04:30 +02001367 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001368 return 0;
1369}
1370
1371void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
Juan Quintela84e2e3e2009-09-29 22:48:20 +02001372 void *opaque)
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001373{
1374 VMStateField *field = vmsd->fields;
1375
Juan Quintela8fb07912009-09-10 03:04:32 +02001376 if (vmsd->pre_save) {
1377 vmsd->pre_save(opaque);
1378 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001379 while(field->name) {
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001380 if (!field->field_exists ||
1381 field->field_exists(opaque, vmsd->version_id)) {
1382 void *base_addr = opaque + field->offset;
1383 int i, n_elems = 1;
Juan Quintelae61a1e02009-12-02 12:36:38 +01001384 int size = field->size;
Juan Quinteladde04632009-08-20 19:42:26 +02001385
Juan Quintelae61a1e02009-12-02 12:36:38 +01001386 if (field->flags & VMS_VBUFFER) {
1387 size = *(int32_t *)(opaque+field->size_offset);
Juan Quintela33599e22009-12-02 12:36:43 +01001388 if (field->flags & VMS_MULTIPLY) {
1389 size *= field->size;
1390 }
Juan Quintelae61a1e02009-12-02 12:36:38 +01001391 }
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001392 if (field->flags & VMS_ARRAY) {
1393 n_elems = field->num;
Juan Quintelad6698282009-10-16 11:27:17 +02001394 } else if (field->flags & VMS_VARRAY_INT32) {
1395 n_elems = *(int32_t *)(opaque+field->num_offset);
Juan Quintelabdb49412009-10-16 11:35:18 +02001396 } else if (field->flags & VMS_VARRAY_UINT16) {
1397 n_elems = *(uint16_t *)(opaque+field->num_offset);
Juan Quintelab7844212011-03-15 15:53:25 +01001398 } else if (field->flags & VMS_VARRAY_UINT8) {
1399 n_elems = *(uint8_t *)(opaque+field->num_offset);
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001400 }
1401 if (field->flags & VMS_POINTER) {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001402 base_addr = *(void **)base_addr + field->start;
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001403 }
1404 for (i = 0; i < n_elems; i++) {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001405 void *addr = base_addr + size * i;
Juan Quintelaec245e22009-08-20 19:42:29 +02001406
Juan Quintela85953872009-12-02 12:36:37 +01001407 if (field->flags & VMS_ARRAY_OF_POINTER) {
1408 addr = *(void **)addr;
1409 }
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001410 if (field->flags & VMS_STRUCT) {
1411 vmstate_save_state(f, field->vmsd, addr);
1412 } else {
Juan Quintelae61a1e02009-12-02 12:36:38 +01001413 field->info->put(f, addr, size);
Juan Quintelaf11f6a52009-09-29 22:49:07 +02001414 }
Juan Quintelaec245e22009-08-20 19:42:29 +02001415 }
Juan Quintelaf752a6a2009-08-20 19:42:27 +02001416 }
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001417 field++;
1418 }
Juan Quintela811814b2010-07-26 21:38:43 +02001419 vmstate_subsection_save(f, vmsd, opaque);
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001420}
1421
Juan Quintela4082be42009-08-20 19:42:24 +02001422static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
1423{
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001424 if (!se->vmsd) { /* Old style */
1425 return se->load_state(f, se->opaque, version_id);
1426 }
1427 return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
Juan Quintela4082be42009-08-20 19:42:24 +02001428}
1429
Alex Williamsondc912122011-01-11 14:39:43 -07001430static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
Juan Quintela4082be42009-08-20 19:42:24 +02001431{
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001432 if (!se->vmsd) { /* Old style */
1433 se->save_state(f, se->opaque);
Alex Williamsondc912122011-01-11 14:39:43 -07001434 return;
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001435 }
1436 vmstate_save_state(f,se->vmsd, se->opaque);
Juan Quintela4082be42009-08-20 19:42:24 +02001437}
1438
aliguoria672b462008-11-11 21:33:36 +00001439#define QEMU_VM_FILE_MAGIC 0x5145564d
1440#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1441#define QEMU_VM_FILE_VERSION 0x00000003
1442
1443#define QEMU_VM_EOF 0x00
1444#define QEMU_VM_SECTION_START 0x01
1445#define QEMU_VM_SECTION_PART 0x02
1446#define QEMU_VM_SECTION_END 0x03
1447#define QEMU_VM_SECTION_FULL 0x04
Juan Quintela811814b2010-07-26 21:38:43 +02001448#define QEMU_VM_SUBSECTION 0x05
aliguoria672b462008-11-11 21:33:36 +00001449
Alex Williamsondc912122011-01-11 14:39:43 -07001450bool qemu_savevm_state_blocked(Monitor *mon)
1451{
1452 SaveStateEntry *se;
1453
1454 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1455 if (se->no_migrate) {
1456 monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
1457 se->idstr);
1458 return true;
1459 }
1460 }
1461 return false;
1462}
1463
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001464int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
1465 int shared)
aliguoria672b462008-11-11 21:33:36 +00001466{
1467 SaveStateEntry *se;
1468
lirans@il.ibm.comc163b5c2009-11-02 15:40:58 +02001469 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1470 if(se->set_params == NULL) {
1471 continue;
1472 }
1473 se->set_params(blk_enable, shared, se->opaque);
1474 }
1475
aliguoria672b462008-11-11 21:33:36 +00001476 qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
1477 qemu_put_be32(f, QEMU_VM_FILE_VERSION);
1478
Blue Swirl72cf2d42009-09-12 07:36:22 +00001479 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
aliguoria672b462008-11-11 21:33:36 +00001480 int len;
1481
1482 if (se->save_live_state == NULL)
1483 continue;
1484
1485 /* Section type */
1486 qemu_put_byte(f, QEMU_VM_SECTION_START);
1487 qemu_put_be32(f, se->section_id);
1488
1489 /* ID string */
1490 len = strlen(se->idstr);
1491 qemu_put_byte(f, len);
1492 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1493
1494 qemu_put_be32(f, se->instance_id);
1495 qemu_put_be32(f, se->version_id);
1496
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001497 se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
aliguoria672b462008-11-11 21:33:36 +00001498 }
1499
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001500 if (qemu_file_has_error(f)) {
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001501 qemu_savevm_state_cancel(mon, f);
aliguoria672b462008-11-11 21:33:36 +00001502 return -EIO;
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001503 }
aliguoria672b462008-11-11 21:33:36 +00001504
1505 return 0;
1506}
1507
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001508int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
aliguoria672b462008-11-11 21:33:36 +00001509{
1510 SaveStateEntry *se;
1511 int ret = 1;
1512
Blue Swirl72cf2d42009-09-12 07:36:22 +00001513 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
aliguoria672b462008-11-11 21:33:36 +00001514 if (se->save_live_state == NULL)
1515 continue;
1516
1517 /* Section type */
1518 qemu_put_byte(f, QEMU_VM_SECTION_PART);
1519 qemu_put_be32(f, se->section_id);
1520
Jan Kiszka90697be2009-12-01 15:19:55 +01001521 ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
1522 if (!ret) {
1523 /* Do not proceed to the next vmstate before this one reported
1524 completion of the current stage. This serializes the migration
1525 and reduces the probability that a faster changing state is
1526 synchronized over and over again. */
1527 break;
1528 }
aliguoria672b462008-11-11 21:33:36 +00001529 }
1530
1531 if (ret)
1532 return 1;
1533
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001534 if (qemu_file_has_error(f)) {
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001535 qemu_savevm_state_cancel(mon, f);
aliguoria672b462008-11-11 21:33:36 +00001536 return -EIO;
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001537 }
aliguoria672b462008-11-11 21:33:36 +00001538
1539 return 0;
1540}
1541
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001542int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
aliguoria672b462008-11-11 21:33:36 +00001543{
1544 SaveStateEntry *se;
1545
Jan Kiszkaea375f92010-03-01 19:10:30 +01001546 cpu_synchronize_all_states();
1547
Blue Swirl72cf2d42009-09-12 07:36:22 +00001548 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
aliguoria672b462008-11-11 21:33:36 +00001549 if (se->save_live_state == NULL)
1550 continue;
1551
1552 /* Section type */
1553 qemu_put_byte(f, QEMU_VM_SECTION_END);
1554 qemu_put_be32(f, se->section_id);
1555
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001556 se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
aliguoria672b462008-11-11 21:33:36 +00001557 }
1558
Blue Swirl72cf2d42009-09-12 07:36:22 +00001559 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
aliguoria672b462008-11-11 21:33:36 +00001560 int len;
1561
Juan Quintela9ed7d6a2009-08-20 19:42:25 +02001562 if (se->save_state == NULL && se->vmsd == NULL)
aliguoria672b462008-11-11 21:33:36 +00001563 continue;
1564
1565 /* Section type */
1566 qemu_put_byte(f, QEMU_VM_SECTION_FULL);
1567 qemu_put_be32(f, se->section_id);
1568
1569 /* ID string */
1570 len = strlen(se->idstr);
1571 qemu_put_byte(f, len);
1572 qemu_put_buffer(f, (uint8_t *)se->idstr, len);
1573
1574 qemu_put_be32(f, se->instance_id);
1575 qemu_put_be32(f, se->version_id);
1576
Alex Williamsondc912122011-01-11 14:39:43 -07001577 vmstate_save(f, se);
aliguoria672b462008-11-11 21:33:36 +00001578 }
1579
1580 qemu_put_byte(f, QEMU_VM_EOF);
1581
1582 if (qemu_file_has_error(f))
1583 return -EIO;
1584
1585 return 0;
1586}
1587
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001588void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001589{
1590 SaveStateEntry *se;
1591
1592 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
1593 if (se->save_live_state) {
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001594 se->save_live_state(mon, f, -1, se->opaque);
Jan Kiszka4ec7fcc2009-11-30 18:21:21 +01001595 }
1596 }
1597}
1598
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001599static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
aliguoria672b462008-11-11 21:33:36 +00001600{
1601 int saved_vm_running;
1602 int ret;
1603
1604 saved_vm_running = vm_running;
Jan Kiszkae07bbac2011-02-09 16:29:40 +01001605 vm_stop(VMSTOP_SAVEVM);
aliguoria672b462008-11-11 21:33:36 +00001606
Alex Williamsondc912122011-01-11 14:39:43 -07001607 if (qemu_savevm_state_blocked(mon)) {
1608 ret = -EINVAL;
1609 goto out;
1610 }
1611
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001612 ret = qemu_savevm_state_begin(mon, f, 0, 0);
aliguoria672b462008-11-11 21:33:36 +00001613 if (ret < 0)
1614 goto out;
1615
1616 do {
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001617 ret = qemu_savevm_state_iterate(mon, f);
aliguoria672b462008-11-11 21:33:36 +00001618 if (ret < 0)
1619 goto out;
1620 } while (ret == 0);
1621
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001622 ret = qemu_savevm_state_complete(mon, f);
aliguoria672b462008-11-11 21:33:36 +00001623
1624out:
1625 if (qemu_file_has_error(f))
1626 ret = -EIO;
1627
1628 if (!ret && saved_vm_running)
1629 vm_start();
1630
1631 return ret;
1632}
1633
1634static SaveStateEntry *find_se(const char *idstr, int instance_id)
1635{
1636 SaveStateEntry *se;
1637
Blue Swirl72cf2d42009-09-12 07:36:22 +00001638 QTAILQ_FOREACH(se, &savevm_handlers, entry) {
aliguoria672b462008-11-11 21:33:36 +00001639 if (!strcmp(se->idstr, idstr) &&
Jan Kiszka4d2ffa02010-05-15 13:32:40 +02001640 (instance_id == se->instance_id ||
1641 instance_id == se->alias_id))
aliguoria672b462008-11-11 21:33:36 +00001642 return se;
Alex Williamson7685ee62010-06-25 11:09:14 -06001643 /* Migrating from an older version? */
1644 if (strstr(se->idstr, idstr) && se->compat) {
1645 if (!strcmp(se->compat->idstr, idstr) &&
1646 (instance_id == se->compat->instance_id ||
1647 instance_id == se->alias_id))
1648 return se;
1649 }
aliguoria672b462008-11-11 21:33:36 +00001650 }
1651 return NULL;
1652}
1653
Juan Quintela811814b2010-07-26 21:38:43 +02001654static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
1655{
1656 while(sub && sub->needed) {
1657 if (strcmp(idstr, sub->vmsd->name) == 0) {
1658 return sub->vmsd;
1659 }
1660 sub++;
1661 }
1662 return NULL;
1663}
1664
1665static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
1666 void *opaque)
1667{
Yoshiaki Tamuraeb602602011-02-03 13:34:08 +09001668 const VMStateSubsection *sub = vmsd->subsections;
1669
1670 if (!sub || !sub->needed) {
1671 return 0;
1672 }
1673
Juan Quintela811814b2010-07-26 21:38:43 +02001674 while (qemu_peek_byte(f) == QEMU_VM_SUBSECTION) {
1675 char idstr[256];
1676 int ret;
Blue Swirl49a29422010-10-13 18:41:29 +00001677 uint8_t version_id, len;
Juan Quintela811814b2010-07-26 21:38:43 +02001678 const VMStateDescription *sub_vmsd;
1679
Blue Swirl49a29422010-10-13 18:41:29 +00001680 qemu_get_byte(f); /* subsection */
Juan Quintela811814b2010-07-26 21:38:43 +02001681 len = qemu_get_byte(f);
1682 qemu_get_buffer(f, (uint8_t *)idstr, len);
1683 idstr[len] = 0;
1684 version_id = qemu_get_be32(f);
1685
Yoshiaki Tamuraeb602602011-02-03 13:34:08 +09001686 sub_vmsd = vmstate_get_subsection(sub, idstr);
Juan Quintela811814b2010-07-26 21:38:43 +02001687 if (sub_vmsd == NULL) {
1688 return -ENOENT;
1689 }
Yoshiaki Tamuraeb602602011-02-03 13:34:08 +09001690 assert(!sub_vmsd->subsections);
Juan Quintela811814b2010-07-26 21:38:43 +02001691 ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
1692 if (ret) {
1693 return ret;
1694 }
1695 }
1696 return 0;
1697}
1698
1699static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
1700 void *opaque)
1701{
1702 const VMStateSubsection *sub = vmsd->subsections;
1703
1704 while (sub && sub->needed) {
1705 if (sub->needed(opaque)) {
1706 const VMStateDescription *vmsd = sub->vmsd;
1707 uint8_t len;
1708
1709 qemu_put_byte(f, QEMU_VM_SUBSECTION);
1710 len = strlen(vmsd->name);
1711 qemu_put_byte(f, len);
1712 qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
1713 qemu_put_be32(f, vmsd->version_id);
Yoshiaki Tamuraeb602602011-02-03 13:34:08 +09001714 assert(!vmsd->subsections);
Juan Quintela811814b2010-07-26 21:38:43 +02001715 vmstate_save_state(f, vmsd, opaque);
1716 }
1717 sub++;
1718 }
1719}
1720
aliguoria672b462008-11-11 21:33:36 +00001721typedef struct LoadStateEntry {
Blue Swirl72cf2d42009-09-12 07:36:22 +00001722 QLIST_ENTRY(LoadStateEntry) entry;
aliguoria672b462008-11-11 21:33:36 +00001723 SaveStateEntry *se;
1724 int section_id;
1725 int version_id;
aliguoria672b462008-11-11 21:33:36 +00001726} LoadStateEntry;
1727
aliguoria672b462008-11-11 21:33:36 +00001728int qemu_loadvm_state(QEMUFile *f)
1729{
Blue Swirl72cf2d42009-09-12 07:36:22 +00001730 QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
1731 QLIST_HEAD_INITIALIZER(loadvm_handlers);
Juan Quintelaf4dbb8d2009-09-01 02:12:33 +02001732 LoadStateEntry *le, *new_le;
aliguoria672b462008-11-11 21:33:36 +00001733 uint8_t section_type;
1734 unsigned int v;
1735 int ret;
1736
Alex Williamsondc912122011-01-11 14:39:43 -07001737 if (qemu_savevm_state_blocked(default_mon)) {
1738 return -EINVAL;
1739 }
1740
aliguoria672b462008-11-11 21:33:36 +00001741 v = qemu_get_be32(f);
1742 if (v != QEMU_VM_FILE_MAGIC)
1743 return -EINVAL;
1744
1745 v = qemu_get_be32(f);
Juan Quintelabbfe1402009-09-10 03:04:24 +02001746 if (v == QEMU_VM_FILE_VERSION_COMPAT) {
1747 fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
1748 return -ENOTSUP;
1749 }
aliguoria672b462008-11-11 21:33:36 +00001750 if (v != QEMU_VM_FILE_VERSION)
1751 return -ENOTSUP;
1752
1753 while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
1754 uint32_t instance_id, version_id, section_id;
aliguoria672b462008-11-11 21:33:36 +00001755 SaveStateEntry *se;
1756 char idstr[257];
1757 int len;
1758
1759 switch (section_type) {
1760 case QEMU_VM_SECTION_START:
1761 case QEMU_VM_SECTION_FULL:
1762 /* Read section start */
1763 section_id = qemu_get_be32(f);
1764 len = qemu_get_byte(f);
1765 qemu_get_buffer(f, (uint8_t *)idstr, len);
1766 idstr[len] = 0;
1767 instance_id = qemu_get_be32(f);
1768 version_id = qemu_get_be32(f);
1769
1770 /* Find savevm section */
1771 se = find_se(idstr, instance_id);
1772 if (se == NULL) {
1773 fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
1774 ret = -EINVAL;
1775 goto out;
1776 }
1777
1778 /* Validate version */
1779 if (version_id > se->version_id) {
1780 fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
1781 version_id, idstr, se->version_id);
1782 ret = -EINVAL;
1783 goto out;
1784 }
1785
1786 /* Add entry */
1787 le = qemu_mallocz(sizeof(*le));
aliguoria672b462008-11-11 21:33:36 +00001788
1789 le->se = se;
1790 le->section_id = section_id;
1791 le->version_id = version_id;
Blue Swirl72cf2d42009-09-12 07:36:22 +00001792 QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
aliguoria672b462008-11-11 21:33:36 +00001793
Juan Quintela4082be42009-08-20 19:42:24 +02001794 ret = vmstate_load(f, le->se, le->version_id);
Juan Quintelab5a22e42009-08-20 19:42:23 +02001795 if (ret < 0) {
1796 fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
1797 instance_id, idstr);
1798 goto out;
1799 }
aliguoria672b462008-11-11 21:33:36 +00001800 break;
1801 case QEMU_VM_SECTION_PART:
1802 case QEMU_VM_SECTION_END:
1803 section_id = qemu_get_be32(f);
1804
Blue Swirl72cf2d42009-09-12 07:36:22 +00001805 QLIST_FOREACH(le, &loadvm_handlers, entry) {
Juan Quintelaf4dbb8d2009-09-01 02:12:33 +02001806 if (le->section_id == section_id) {
1807 break;
1808 }
1809 }
aliguoria672b462008-11-11 21:33:36 +00001810 if (le == NULL) {
1811 fprintf(stderr, "Unknown savevm section %d\n", section_id);
1812 ret = -EINVAL;
1813 goto out;
1814 }
1815
Juan Quintela4082be42009-08-20 19:42:24 +02001816 ret = vmstate_load(f, le->se, le->version_id);
Juan Quintelab5a22e42009-08-20 19:42:23 +02001817 if (ret < 0) {
1818 fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
1819 section_id);
1820 goto out;
1821 }
aliguoria672b462008-11-11 21:33:36 +00001822 break;
1823 default:
1824 fprintf(stderr, "Unknown savevm section type %d\n", section_type);
1825 ret = -EINVAL;
1826 goto out;
1827 }
1828 }
1829
Jan Kiszkaea375f92010-03-01 19:10:30 +01001830 cpu_synchronize_all_post_init();
1831
aliguoria672b462008-11-11 21:33:36 +00001832 ret = 0;
1833
1834out:
Blue Swirl72cf2d42009-09-12 07:36:22 +00001835 QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
1836 QLIST_REMOVE(le, entry);
aliguoria672b462008-11-11 21:33:36 +00001837 qemu_free(le);
1838 }
1839
1840 if (qemu_file_has_error(f))
1841 ret = -EIO;
1842
1843 return ret;
1844}
1845
aliguoria672b462008-11-11 21:33:36 +00001846static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
1847 const char *name)
1848{
1849 QEMUSnapshotInfo *sn_tab, *sn;
1850 int nb_sns, i, ret;
1851
1852 ret = -ENOENT;
1853 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1854 if (nb_sns < 0)
1855 return ret;
1856 for(i = 0; i < nb_sns; i++) {
1857 sn = &sn_tab[i];
1858 if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
1859 *sn_info = *sn;
1860 ret = 0;
1861 break;
1862 }
1863 }
1864 qemu_free(sn_tab);
1865 return ret;
1866}
1867
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001868/*
1869 * Deletes snapshots of a given name in all opened images.
1870 */
1871static int del_existing_snapshots(Monitor *mon, const char *name)
1872{
1873 BlockDriverState *bs;
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001874 QEMUSnapshotInfo sn1, *snapshot = &sn1;
1875 int ret;
1876
Markus Armbrusterdbc13592010-06-02 18:55:21 +02001877 bs = NULL;
1878 while ((bs = bdrv_next(bs))) {
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001879 if (bdrv_can_snapshot(bs) &&
1880 bdrv_snapshot_find(bs, snapshot, name) >= 0)
1881 {
1882 ret = bdrv_snapshot_delete(bs, name);
1883 if (ret < 0) {
1884 monitor_printf(mon,
1885 "Error while deleting snapshot on '%s'\n",
1886 bdrv_get_device_name(bs));
1887 return -1;
1888 }
1889 }
1890 }
1891
1892 return 0;
1893}
1894
Luiz Capitulinod54908a2009-08-28 15:27:13 -03001895void do_savevm(Monitor *mon, const QDict *qdict)
aliguoria672b462008-11-11 21:33:36 +00001896{
1897 BlockDriverState *bs, *bs1;
1898 QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001899 int ret;
aliguoria672b462008-11-11 21:33:36 +00001900 QEMUFile *f;
1901 int saved_vm_running;
aliguori2d22b182008-12-11 21:06:49 +00001902 uint32_t vm_state_size;
aliguoria672b462008-11-11 21:33:36 +00001903#ifdef _WIN32
1904 struct _timeb tb;
Miguel Di Ciurcio Filho7d631a12010-08-04 14:55:49 -03001905 struct tm *ptm;
aliguoria672b462008-11-11 21:33:36 +00001906#else
1907 struct timeval tv;
Miguel Di Ciurcio Filho7d631a12010-08-04 14:55:49 -03001908 struct tm tm;
aliguoria672b462008-11-11 21:33:36 +00001909#endif
Luiz Capitulinod54908a2009-08-28 15:27:13 -03001910 const char *name = qdict_get_try_str(qdict, "name");
aliguoria672b462008-11-11 21:33:36 +00001911
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03001912 /* Verify if there is a device that doesn't support snapshots and is writable */
Markus Armbrusterdbc13592010-06-02 18:55:21 +02001913 bs = NULL;
1914 while ((bs = bdrv_next(bs))) {
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03001915
1916 if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
1917 continue;
1918 }
1919
1920 if (!bdrv_can_snapshot(bs)) {
1921 monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
1922 bdrv_get_device_name(bs));
1923 return;
1924 }
1925 }
1926
Markus Armbrusterf9092b12010-06-25 10:33:39 +02001927 bs = bdrv_snapshots();
aliguoria672b462008-11-11 21:33:36 +00001928 if (!bs) {
aliguori376253e2009-03-05 23:01:23 +00001929 monitor_printf(mon, "No block device can accept snapshots\n");
aliguoria672b462008-11-11 21:33:36 +00001930 return;
1931 }
aliguoria672b462008-11-11 21:33:36 +00001932
1933 saved_vm_running = vm_running;
Jan Kiszkae07bbac2011-02-09 16:29:40 +01001934 vm_stop(VMSTOP_SAVEVM);
aliguoria672b462008-11-11 21:33:36 +00001935
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001936 memset(sn, 0, sizeof(*sn));
aliguoria672b462008-11-11 21:33:36 +00001937
1938 /* fill auxiliary fields */
1939#ifdef _WIN32
1940 _ftime(&tb);
1941 sn->date_sec = tb.time;
1942 sn->date_nsec = tb.millitm * 1000000;
1943#else
1944 gettimeofday(&tv, NULL);
1945 sn->date_sec = tv.tv_sec;
1946 sn->date_nsec = tv.tv_usec * 1000;
1947#endif
Paolo Bonzini74475452011-03-11 16:47:48 +01001948 sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
aliguoria672b462008-11-11 21:33:36 +00001949
Miguel Di Ciurcio Filho7d631a12010-08-04 14:55:49 -03001950 if (name) {
1951 ret = bdrv_snapshot_find(bs, old_sn, name);
1952 if (ret >= 0) {
1953 pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
1954 pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
1955 } else {
1956 pstrcpy(sn->name, sizeof(sn->name), name);
1957 }
1958 } else {
1959#ifdef _WIN32
1960 ptm = localtime(&tb.time);
1961 strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
1962#else
Blue Swirld7d9b522010-09-09 19:13:04 +00001963 /* cast below needed for OpenBSD where tv_sec is still 'long' */
1964 localtime_r((const time_t *)&tv.tv_sec, &tm);
Miguel Di Ciurcio Filho7d631a12010-08-04 14:55:49 -03001965 strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
1966#endif
1967 }
1968
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001969 /* Delete old snapshots of the same name */
Marcelo Tosattif139a412010-01-20 14:26:34 -02001970 if (name && del_existing_snapshots(mon, name) < 0) {
Kevin Wolfcb499fb2009-11-03 17:34:37 +01001971 goto the_end;
1972 }
1973
aliguoria672b462008-11-11 21:33:36 +00001974 /* save the VM state */
Christoph Hellwig45566e92009-07-10 23:11:57 +02001975 f = qemu_fopen_bdrv(bs, 1);
aliguoria672b462008-11-11 21:33:36 +00001976 if (!f) {
aliguori376253e2009-03-05 23:01:23 +00001977 monitor_printf(mon, "Could not open VM state file\n");
aliguoria672b462008-11-11 21:33:36 +00001978 goto the_end;
1979 }
Jan Kiszkaf327aa02009-11-30 18:21:21 +01001980 ret = qemu_savevm_state(mon, f);
aliguori2d22b182008-12-11 21:06:49 +00001981 vm_state_size = qemu_ftell(f);
aliguoria672b462008-11-11 21:33:36 +00001982 qemu_fclose(f);
1983 if (ret < 0) {
aliguori376253e2009-03-05 23:01:23 +00001984 monitor_printf(mon, "Error %d while writing VM\n", ret);
aliguoria672b462008-11-11 21:33:36 +00001985 goto the_end;
1986 }
1987
1988 /* create the snapshots */
1989
Markus Armbrusterdbc13592010-06-02 18:55:21 +02001990 bs1 = NULL;
1991 while ((bs1 = bdrv_next(bs1))) {
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03001992 if (bdrv_can_snapshot(bs1)) {
aliguori2d22b182008-12-11 21:06:49 +00001993 /* Write VM state size only to the image that contains the state */
1994 sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
aliguoria672b462008-11-11 21:33:36 +00001995 ret = bdrv_snapshot_create(bs1, sn);
1996 if (ret < 0) {
aliguori376253e2009-03-05 23:01:23 +00001997 monitor_printf(mon, "Error while creating snapshot on '%s'\n",
1998 bdrv_get_device_name(bs1));
aliguoria672b462008-11-11 21:33:36 +00001999 }
2000 }
2001 }
2002
2003 the_end:
2004 if (saved_vm_running)
2005 vm_start();
2006}
2007
Markus Armbruster03cd4652010-02-17 16:24:10 +01002008int load_vmstate(const char *name)
aliguoria672b462008-11-11 21:33:36 +00002009{
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002010 BlockDriverState *bs, *bs_vm_state;
aliguori2d22b182008-12-11 21:06:49 +00002011 QEMUSnapshotInfo sn;
aliguoria672b462008-11-11 21:33:36 +00002012 QEMUFile *f;
Gerd Hoffmann751c6a12009-07-22 16:42:57 +02002013 int ret;
aliguoria672b462008-11-11 21:33:36 +00002014
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002015 bs_vm_state = bdrv_snapshots();
2016 if (!bs_vm_state) {
2017 error_report("No block device supports snapshots");
2018 return -ENOTSUP;
2019 }
2020
2021 /* Don't even try to load empty VM states */
2022 ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
2023 if (ret < 0) {
2024 return ret;
2025 } else if (sn.vm_state_size == 0) {
Kevin Wolfe11480d2011-03-01 10:48:12 +01002026 error_report("This is a disk-only snapshot. Revert to it offline "
2027 "using qemu-img.");
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002028 return -EINVAL;
2029 }
2030
2031 /* Verify if there is any device that doesn't support snapshots and is
2032 writable and check if the requested snapshot is available too. */
Markus Armbrusterdbc13592010-06-02 18:55:21 +02002033 bs = NULL;
2034 while ((bs = bdrv_next(bs))) {
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03002035
2036 if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
2037 continue;
2038 }
2039
2040 if (!bdrv_can_snapshot(bs)) {
2041 error_report("Device '%s' is writable but does not support snapshots.",
2042 bdrv_get_device_name(bs));
2043 return -ENOTSUP;
2044 }
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03002045
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002046 ret = bdrv_snapshot_find(bs, &sn, name);
2047 if (ret < 0) {
2048 error_report("Device '%s' does not have the requested snapshot '%s'",
2049 bdrv_get_device_name(bs), name);
2050 return ret;
2051 }
aliguoria672b462008-11-11 21:33:36 +00002052 }
2053
2054 /* Flush all IO requests so they don't interfere with the new state. */
2055 qemu_aio_flush();
2056
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002057 bs = NULL;
2058 while ((bs = bdrv_next(bs))) {
2059 if (bdrv_can_snapshot(bs)) {
2060 ret = bdrv_snapshot_goto(bs, name);
aliguoria672b462008-11-11 21:33:36 +00002061 if (ret < 0) {
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002062 error_report("Error %d while activating snapshot '%s' on '%s'",
2063 ret, name, bdrv_get_device_name(bs));
2064 return ret;
aliguoria672b462008-11-11 21:33:36 +00002065 }
2066 }
2067 }
2068
aliguoria672b462008-11-11 21:33:36 +00002069 /* restore the VM state */
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002070 f = qemu_fopen_bdrv(bs_vm_state, 0);
aliguoria672b462008-11-11 21:33:36 +00002071 if (!f) {
Markus Armbruster1ecda022010-02-18 17:25:24 +01002072 error_report("Could not open VM state file");
Juan Quintela05f24012009-08-20 19:42:22 +02002073 return -EINVAL;
aliguoria672b462008-11-11 21:33:36 +00002074 }
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002075
Jan Kiszka5a8a49d2011-06-14 18:29:45 +02002076 qemu_system_reset(VMRESET_SILENT);
aliguoria672b462008-11-11 21:33:36 +00002077 ret = qemu_loadvm_state(f);
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002078
aliguoria672b462008-11-11 21:33:36 +00002079 qemu_fclose(f);
2080 if (ret < 0) {
Markus Armbruster1ecda022010-02-18 17:25:24 +01002081 error_report("Error %d while loading VM state", ret);
Juan Quintela05f24012009-08-20 19:42:22 +02002082 return ret;
aliguoria672b462008-11-11 21:33:36 +00002083 }
Miguel Di Ciurcio Filhof0aa7a82010-07-19 15:25:01 -03002084
Juan Quintela05f24012009-08-20 19:42:22 +02002085 return 0;
Juan Quintela7b630342009-08-20 19:42:20 +02002086}
2087
Luiz Capitulinod54908a2009-08-28 15:27:13 -03002088void do_delvm(Monitor *mon, const QDict *qdict)
aliguoria672b462008-11-11 21:33:36 +00002089{
2090 BlockDriverState *bs, *bs1;
Gerd Hoffmann751c6a12009-07-22 16:42:57 +02002091 int ret;
Luiz Capitulinod54908a2009-08-28 15:27:13 -03002092 const char *name = qdict_get_str(qdict, "name");
aliguoria672b462008-11-11 21:33:36 +00002093
Markus Armbrusterf9092b12010-06-25 10:33:39 +02002094 bs = bdrv_snapshots();
aliguoria672b462008-11-11 21:33:36 +00002095 if (!bs) {
aliguori376253e2009-03-05 23:01:23 +00002096 monitor_printf(mon, "No block device supports snapshots\n");
aliguoria672b462008-11-11 21:33:36 +00002097 return;
2098 }
2099
Markus Armbrusterdbc13592010-06-02 18:55:21 +02002100 bs1 = NULL;
2101 while ((bs1 = bdrv_next(bs1))) {
Miguel Di Ciurcio Filhofeeee5a2010-06-08 10:40:55 -03002102 if (bdrv_can_snapshot(bs1)) {
aliguoria672b462008-11-11 21:33:36 +00002103 ret = bdrv_snapshot_delete(bs1, name);
2104 if (ret < 0) {
2105 if (ret == -ENOTSUP)
aliguori376253e2009-03-05 23:01:23 +00002106 monitor_printf(mon,
2107 "Snapshots not supported on device '%s'\n",
2108 bdrv_get_device_name(bs1));
aliguoria672b462008-11-11 21:33:36 +00002109 else
aliguori376253e2009-03-05 23:01:23 +00002110 monitor_printf(mon, "Error %d while deleting snapshot on "
2111 "'%s'\n", ret, bdrv_get_device_name(bs1));
aliguoria672b462008-11-11 21:33:36 +00002112 }
2113 }
2114 }
2115}
2116
aliguori376253e2009-03-05 23:01:23 +00002117void do_info_snapshots(Monitor *mon)
aliguoria672b462008-11-11 21:33:36 +00002118{
2119 BlockDriverState *bs, *bs1;
Miguel Di Ciurcio Filhof9209912010-08-04 14:55:48 -03002120 QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
2121 int nb_sns, i, ret, available;
2122 int total;
2123 int *available_snapshots;
aliguoria672b462008-11-11 21:33:36 +00002124 char buf[256];
2125
Markus Armbrusterf9092b12010-06-25 10:33:39 +02002126 bs = bdrv_snapshots();
aliguoria672b462008-11-11 21:33:36 +00002127 if (!bs) {
aliguori376253e2009-03-05 23:01:23 +00002128 monitor_printf(mon, "No available block device supports snapshots\n");
aliguoria672b462008-11-11 21:33:36 +00002129 return;
2130 }
aliguoria672b462008-11-11 21:33:36 +00002131
2132 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
2133 if (nb_sns < 0) {
aliguori376253e2009-03-05 23:01:23 +00002134 monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
aliguoria672b462008-11-11 21:33:36 +00002135 return;
2136 }
Miguel Di Ciurcio Filhof9209912010-08-04 14:55:48 -03002137
2138 if (nb_sns == 0) {
2139 monitor_printf(mon, "There is no snapshot available.\n");
2140 return;
aliguoria672b462008-11-11 21:33:36 +00002141 }
Miguel Di Ciurcio Filhof9209912010-08-04 14:55:48 -03002142
2143 available_snapshots = qemu_mallocz(sizeof(int) * nb_sns);
2144 total = 0;
2145 for (i = 0; i < nb_sns; i++) {
2146 sn = &sn_tab[i];
2147 available = 1;
2148 bs1 = NULL;
2149
2150 while ((bs1 = bdrv_next(bs1))) {
2151 if (bdrv_can_snapshot(bs1) && bs1 != bs) {
2152 ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
2153 if (ret < 0) {
2154 available = 0;
2155 break;
2156 }
2157 }
2158 }
2159
2160 if (available) {
2161 available_snapshots[total] = i;
2162 total++;
2163 }
2164 }
2165
2166 if (total > 0) {
2167 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
2168 for (i = 0; i < total; i++) {
2169 sn = &sn_tab[available_snapshots[i]];
2170 monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
2171 }
2172 } else {
2173 monitor_printf(mon, "There is no suitable snapshot available\n");
2174 }
2175
aliguoria672b462008-11-11 21:33:36 +00002176 qemu_free(sn_tab);
Miguel Di Ciurcio Filhof9209912010-08-04 14:55:48 -03002177 qemu_free(available_snapshots);
2178
aliguoria672b462008-11-11 21:33:36 +00002179}