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| 1 |
/*
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|---|---|
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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| 8 |
* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
| 25 |
#include <fcntl.h> |
| 26 |
#include <signal.h> |
| 27 |
#include <time.h> |
| 28 |
#include <errno.h> |
| 29 |
#include <sys/time.h> |
| 30 |
#include <zlib.h> |
| 31 |
|
| 32 |
/* Needed early for CONFIG_BSD etc. */
|
| 33 |
#include "config-host.h" |
| 34 |
|
| 35 |
#ifndef _WIN32
|
| 36 |
#include <sys/times.h> |
| 37 |
#include <sys/wait.h> |
| 38 |
#include <termios.h> |
| 39 |
#include <sys/mman.h> |
| 40 |
#include <sys/ioctl.h> |
| 41 |
#include <sys/resource.h> |
| 42 |
#include <sys/socket.h> |
| 43 |
#include <netinet/in.h> |
| 44 |
#include <net/if.h> |
| 45 |
#include <arpa/inet.h> |
| 46 |
#include <dirent.h> |
| 47 |
#include <netdb.h> |
| 48 |
#include <sys/select.h> |
| 49 |
#ifdef CONFIG_BSD
|
| 50 |
#include <sys/stat.h> |
| 51 |
#if defined(__FreeBSD__) || defined(__DragonFly__)
|
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#include <libutil.h> |
| 53 |
#else
|
| 54 |
#include <util.h> |
| 55 |
#endif
|
| 56 |
#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
|
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#include <freebsd/stdlib.h> |
| 58 |
#else
|
| 59 |
#ifdef __linux__
|
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#include <pty.h> |
| 61 |
#include <malloc.h> |
| 62 |
#include <linux/rtc.h> |
| 63 |
#endif
|
| 64 |
#endif
|
| 65 |
#endif
|
| 66 |
|
| 67 |
#ifdef _WIN32
|
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#include <windows.h> |
| 69 |
#include <malloc.h> |
| 70 |
#include <sys/timeb.h> |
| 71 |
#include <mmsystem.h> |
| 72 |
#define getopt_long_only getopt_long
|
| 73 |
#define memalign(align, size) malloc(size)
|
| 74 |
#endif
|
| 75 |
|
| 76 |
#include "qemu-common.h" |
| 77 |
#include "hw/hw.h" |
| 78 |
#include "net.h" |
| 79 |
#include "monitor.h" |
| 80 |
#include "sysemu.h" |
| 81 |
#include "qemu-timer.h" |
| 82 |
#include "qemu-char.h" |
| 83 |
#include "block.h" |
| 84 |
#include "audio/audio.h" |
| 85 |
#include "migration.h" |
| 86 |
#include "qemu_socket.h" |
| 87 |
#include "qemu-queue.h" |
| 88 |
|
| 89 |
/* point to the block driver where the snapshots are managed */
|
| 90 |
static BlockDriverState *bs_snapshots;
|
| 91 |
|
| 92 |
#define SELF_ANNOUNCE_ROUNDS 5 |
| 93 |
|
| 94 |
#ifndef ETH_P_RARP
|
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#define ETH_P_RARP 0x0835 |
| 96 |
#endif
|
| 97 |
#define ARP_HTYPE_ETH 0x0001 |
| 98 |
#define ARP_PTYPE_IP 0x0800 |
| 99 |
#define ARP_OP_REQUEST_REV 0x3 |
| 100 |
|
| 101 |
static int announce_self_create(uint8_t *buf, |
| 102 |
uint8_t *mac_addr) |
| 103 |
{
|
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/* Ethernet header. */
|
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memset(buf, 0xff, 6); /* destination MAC addr */ |
| 106 |
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
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*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
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|
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/* RARP header. */
|
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*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
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*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
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*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
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*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
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*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
| 115 |
memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
| 116 |
memset(buf + 28, 0x00, 4); /* source protocol addr */ |
| 117 |
memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
| 118 |
memset(buf + 38, 0x00, 4); /* target protocol addr */ |
| 119 |
|
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/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
|
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memset(buf + 42, 0x00, 18); |
| 122 |
|
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return 60; /* len (FCS will be added by hardware) */ |
| 124 |
} |
| 125 |
|
| 126 |
static void qemu_announce_self_once(void *opaque) |
| 127 |
{
|
| 128 |
int i, len;
|
| 129 |
VLANState *vlan; |
| 130 |
VLANClientState *vc; |
| 131 |
uint8_t buf[60];
|
| 132 |
static int count = SELF_ANNOUNCE_ROUNDS; |
| 133 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
| 134 |
|
| 135 |
for (i = 0; i < MAX_NICS; i++) { |
| 136 |
if (!nd_table[i].used)
|
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continue;
|
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len = announce_self_create(buf, nd_table[i].macaddr); |
| 139 |
vlan = nd_table[i].vlan; |
| 140 |
QTAILQ_FOREACH(vc, &vlan->clients, next) {
|
| 141 |
qemu_send_packet_raw(vc, buf, len); |
| 142 |
} |
| 143 |
} |
| 144 |
if (--count) {
|
| 145 |
/* delay 50ms, 150ms, 250ms, ... */
|
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qemu_mod_timer(timer, qemu_get_clock(rt_clock) + |
| 147 |
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
| 148 |
} else {
|
| 149 |
qemu_del_timer(timer); |
| 150 |
qemu_free_timer(timer); |
| 151 |
} |
| 152 |
} |
| 153 |
|
| 154 |
void qemu_announce_self(void) |
| 155 |
{
|
| 156 |
static QEMUTimer *timer;
|
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timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
| 158 |
qemu_announce_self_once(&timer); |
| 159 |
} |
| 160 |
|
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/***********************************************************/
|
| 162 |
/* savevm/loadvm support */
|
| 163 |
|
| 164 |
#define IO_BUF_SIZE 32768 |
| 165 |
|
| 166 |
struct QEMUFile {
|
| 167 |
QEMUFilePutBufferFunc *put_buffer; |
| 168 |
QEMUFileGetBufferFunc *get_buffer; |
| 169 |
QEMUFileCloseFunc *close; |
| 170 |
QEMUFileRateLimit *rate_limit; |
| 171 |
QEMUFileSetRateLimit *set_rate_limit; |
| 172 |
void *opaque;
|
| 173 |
int is_write;
|
| 174 |
|
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int64_t buf_offset; /* start of buffer when writing, end of buffer
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when reading */
|
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int buf_index;
|
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int buf_size; /* 0 when writing */ |
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uint8_t buf[IO_BUF_SIZE]; |
| 180 |
|
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int has_error;
|
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}; |
| 183 |
|
| 184 |
typedef struct QEMUFileStdio |
| 185 |
{
|
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FILE *stdio_file; |
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QEMUFile *file; |
| 188 |
} QEMUFileStdio; |
| 189 |
|
| 190 |
typedef struct QEMUFileSocket |
| 191 |
{
|
| 192 |
int fd;
|
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QEMUFile *file; |
| 194 |
} QEMUFileSocket; |
| 195 |
|
| 196 |
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 197 |
{
|
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QEMUFileSocket *s = opaque; |
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ssize_t len; |
| 200 |
|
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do {
|
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len = recv(s->fd, (void *)buf, size, 0); |
| 203 |
} while (len == -1 && socket_error() == EINTR); |
| 204 |
|
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if (len == -1) |
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len = -socket_error(); |
| 207 |
|
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return len;
|
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} |
| 210 |
|
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static int socket_close(void *opaque) |
| 212 |
{
|
| 213 |
QEMUFileSocket *s = opaque; |
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qemu_free(s); |
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return 0; |
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} |
| 217 |
|
| 218 |
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{
|
| 220 |
QEMUFileStdio *s = opaque; |
| 221 |
return fwrite(buf, 1, size, s->stdio_file); |
| 222 |
} |
| 223 |
|
| 224 |
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 225 |
{
|
| 226 |
QEMUFileStdio *s = opaque; |
| 227 |
FILE *fp = s->stdio_file; |
| 228 |
int bytes;
|
| 229 |
|
| 230 |
do {
|
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clearerr(fp); |
| 232 |
bytes = fread(buf, 1, size, fp);
|
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
| 234 |
return bytes;
|
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} |
| 236 |
|
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static int stdio_pclose(void *opaque) |
| 238 |
{
|
| 239 |
QEMUFileStdio *s = opaque; |
| 240 |
pclose(s->stdio_file); |
| 241 |
qemu_free(s); |
| 242 |
return 0; |
| 243 |
} |
| 244 |
|
| 245 |
static int stdio_fclose(void *opaque) |
| 246 |
{
|
| 247 |
QEMUFileStdio *s = opaque; |
| 248 |
fclose(s->stdio_file); |
| 249 |
qemu_free(s); |
| 250 |
return 0; |
| 251 |
} |
| 252 |
|
| 253 |
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
| 254 |
{
|
| 255 |
QEMUFileStdio *s; |
| 256 |
|
| 257 |
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 258 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
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return NULL; |
| 260 |
} |
| 261 |
|
| 262 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
| 263 |
|
| 264 |
s->stdio_file = stdio_file; |
| 265 |
|
| 266 |
if(mode[0] == 'r') { |
| 267 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL); |
| 268 |
} else {
|
| 269 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL); |
| 270 |
} |
| 271 |
return s->file;
|
| 272 |
} |
| 273 |
|
| 274 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 275 |
{
|
| 276 |
FILE *popen_file; |
| 277 |
|
| 278 |
popen_file = popen(command, mode); |
| 279 |
if(popen_file == NULL) { |
| 280 |
return NULL; |
| 281 |
} |
| 282 |
|
| 283 |
return qemu_popen(popen_file, mode);
|
| 284 |
} |
| 285 |
|
| 286 |
int qemu_stdio_fd(QEMUFile *f)
|
| 287 |
{
|
| 288 |
QEMUFileStdio *p; |
| 289 |
int fd;
|
| 290 |
|
| 291 |
p = (QEMUFileStdio *)f->opaque; |
| 292 |
fd = fileno(p->stdio_file); |
| 293 |
|
| 294 |
return fd;
|
| 295 |
} |
| 296 |
|
| 297 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
| 298 |
{
|
| 299 |
QEMUFileStdio *s; |
| 300 |
|
| 301 |
if (mode == NULL || |
| 302 |
(mode[0] != 'r' && mode[0] != 'w') || |
| 303 |
mode[1] != 'b' || mode[2] != 0) { |
| 304 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
| 305 |
return NULL; |
| 306 |
} |
| 307 |
|
| 308 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
| 309 |
s->stdio_file = fdopen(fd, mode); |
| 310 |
if (!s->stdio_file)
|
| 311 |
goto fail;
|
| 312 |
|
| 313 |
if(mode[0] == 'r') { |
| 314 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL); |
| 315 |
} else {
|
| 316 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL); |
| 317 |
} |
| 318 |
return s->file;
|
| 319 |
|
| 320 |
fail:
|
| 321 |
qemu_free(s); |
| 322 |
return NULL; |
| 323 |
} |
| 324 |
|
| 325 |
QEMUFile *qemu_fopen_socket(int fd)
|
| 326 |
{
|
| 327 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
| 328 |
|
| 329 |
s->fd = fd; |
| 330 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
| 331 |
return s->file;
|
| 332 |
} |
| 333 |
|
| 334 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 335 |
int64_t pos, int size)
|
| 336 |
{
|
| 337 |
QEMUFileStdio *s = opaque; |
| 338 |
fseek(s->stdio_file, pos, SEEK_SET); |
| 339 |
fwrite(buf, 1, size, s->stdio_file);
|
| 340 |
return size;
|
| 341 |
} |
| 342 |
|
| 343 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 344 |
{
|
| 345 |
QEMUFileStdio *s = opaque; |
| 346 |
fseek(s->stdio_file, pos, SEEK_SET); |
| 347 |
return fread(buf, 1, size, s->stdio_file); |
| 348 |
} |
| 349 |
|
| 350 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 351 |
{
|
| 352 |
QEMUFileStdio *s; |
| 353 |
|
| 354 |
if (mode == NULL || |
| 355 |
(mode[0] != 'r' && mode[0] != 'w') || |
| 356 |
mode[1] != 'b' || mode[2] != 0) { |
| 357 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
| 358 |
return NULL; |
| 359 |
} |
| 360 |
|
| 361 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
| 362 |
|
| 363 |
s->stdio_file = fopen(filename, mode); |
| 364 |
if (!s->stdio_file)
|
| 365 |
goto fail;
|
| 366 |
|
| 367 |
if(mode[0] == 'w') { |
| 368 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL); |
| 369 |
} else {
|
| 370 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL); |
| 371 |
} |
| 372 |
return s->file;
|
| 373 |
fail:
|
| 374 |
qemu_free(s); |
| 375 |
return NULL; |
| 376 |
} |
| 377 |
|
| 378 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
| 379 |
int64_t pos, int size)
|
| 380 |
{
|
| 381 |
bdrv_save_vmstate(opaque, buf, pos, size); |
| 382 |
return size;
|
| 383 |
} |
| 384 |
|
| 385 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 386 |
{
|
| 387 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
| 388 |
} |
| 389 |
|
| 390 |
static int bdrv_fclose(void *opaque) |
| 391 |
{
|
| 392 |
return 0; |
| 393 |
} |
| 394 |
|
| 395 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
| 396 |
{
|
| 397 |
if (is_writable)
|
| 398 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
| 399 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
| 400 |
} |
| 401 |
|
| 402 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
| 403 |
QEMUFileGetBufferFunc *get_buffer, |
| 404 |
QEMUFileCloseFunc *close, |
| 405 |
QEMUFileRateLimit *rate_limit, |
| 406 |
QEMUFileSetRateLimit *set_rate_limit) |
| 407 |
{
|
| 408 |
QEMUFile *f; |
| 409 |
|
| 410 |
f = qemu_mallocz(sizeof(QEMUFile));
|
| 411 |
|
| 412 |
f->opaque = opaque; |
| 413 |
f->put_buffer = put_buffer; |
| 414 |
f->get_buffer = get_buffer; |
| 415 |
f->close = close; |
| 416 |
f->rate_limit = rate_limit; |
| 417 |
f->set_rate_limit = set_rate_limit; |
| 418 |
f->is_write = 0;
|
| 419 |
|
| 420 |
return f;
|
| 421 |
} |
| 422 |
|
| 423 |
int qemu_file_has_error(QEMUFile *f)
|
| 424 |
{
|
| 425 |
return f->has_error;
|
| 426 |
} |
| 427 |
|
| 428 |
void qemu_file_set_error(QEMUFile *f)
|
| 429 |
{
|
| 430 |
f->has_error = 1;
|
| 431 |
} |
| 432 |
|
| 433 |
void qemu_fflush(QEMUFile *f)
|
| 434 |
{
|
| 435 |
if (!f->put_buffer)
|
| 436 |
return;
|
| 437 |
|
| 438 |
if (f->is_write && f->buf_index > 0) { |
| 439 |
int len;
|
| 440 |
|
| 441 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 442 |
if (len > 0) |
| 443 |
f->buf_offset += f->buf_index; |
| 444 |
else
|
| 445 |
f->has_error = 1;
|
| 446 |
f->buf_index = 0;
|
| 447 |
} |
| 448 |
} |
| 449 |
|
| 450 |
static void qemu_fill_buffer(QEMUFile *f) |
| 451 |
{
|
| 452 |
int len;
|
| 453 |
|
| 454 |
if (!f->get_buffer)
|
| 455 |
return;
|
| 456 |
|
| 457 |
if (f->is_write)
|
| 458 |
abort(); |
| 459 |
|
| 460 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 461 |
if (len > 0) { |
| 462 |
f->buf_index = 0;
|
| 463 |
f->buf_size = len; |
| 464 |
f->buf_offset += len; |
| 465 |
} else if (len != -EAGAIN) |
| 466 |
f->has_error = 1;
|
| 467 |
} |
| 468 |
|
| 469 |
int qemu_fclose(QEMUFile *f)
|
| 470 |
{
|
| 471 |
int ret = 0; |
| 472 |
qemu_fflush(f); |
| 473 |
if (f->close)
|
| 474 |
ret = f->close(f->opaque); |
| 475 |
qemu_free(f); |
| 476 |
return ret;
|
| 477 |
} |
| 478 |
|
| 479 |
void qemu_file_put_notify(QEMUFile *f)
|
| 480 |
{
|
| 481 |
f->put_buffer(f->opaque, NULL, 0, 0); |
| 482 |
} |
| 483 |
|
| 484 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 485 |
{
|
| 486 |
int l;
|
| 487 |
|
| 488 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 489 |
fprintf(stderr, |
| 490 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 491 |
abort(); |
| 492 |
} |
| 493 |
|
| 494 |
while (!f->has_error && size > 0) { |
| 495 |
l = IO_BUF_SIZE - f->buf_index; |
| 496 |
if (l > size)
|
| 497 |
l = size; |
| 498 |
memcpy(f->buf + f->buf_index, buf, l); |
| 499 |
f->is_write = 1;
|
| 500 |
f->buf_index += l; |
| 501 |
buf += l; |
| 502 |
size -= l; |
| 503 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 504 |
qemu_fflush(f); |
| 505 |
} |
| 506 |
} |
| 507 |
|
| 508 |
void qemu_put_byte(QEMUFile *f, int v) |
| 509 |
{
|
| 510 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 511 |
fprintf(stderr, |
| 512 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 513 |
abort(); |
| 514 |
} |
| 515 |
|
| 516 |
f->buf[f->buf_index++] = v; |
| 517 |
f->is_write = 1;
|
| 518 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 519 |
qemu_fflush(f); |
| 520 |
} |
| 521 |
|
| 522 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 523 |
{
|
| 524 |
int size, l;
|
| 525 |
|
| 526 |
if (f->is_write)
|
| 527 |
abort(); |
| 528 |
|
| 529 |
size = size1; |
| 530 |
while (size > 0) { |
| 531 |
l = f->buf_size - f->buf_index; |
| 532 |
if (l == 0) { |
| 533 |
qemu_fill_buffer(f); |
| 534 |
l = f->buf_size - f->buf_index; |
| 535 |
if (l == 0) |
| 536 |
break;
|
| 537 |
} |
| 538 |
if (l > size)
|
| 539 |
l = size; |
| 540 |
memcpy(buf, f->buf + f->buf_index, l); |
| 541 |
f->buf_index += l; |
| 542 |
buf += l; |
| 543 |
size -= l; |
| 544 |
} |
| 545 |
return size1 - size;
|
| 546 |
} |
| 547 |
|
| 548 |
int qemu_get_byte(QEMUFile *f)
|
| 549 |
{
|
| 550 |
if (f->is_write)
|
| 551 |
abort(); |
| 552 |
|
| 553 |
if (f->buf_index >= f->buf_size) {
|
| 554 |
qemu_fill_buffer(f); |
| 555 |
if (f->buf_index >= f->buf_size)
|
| 556 |
return 0; |
| 557 |
} |
| 558 |
return f->buf[f->buf_index++];
|
| 559 |
} |
| 560 |
|
| 561 |
int64_t qemu_ftell(QEMUFile *f) |
| 562 |
{
|
| 563 |
return f->buf_offset - f->buf_size + f->buf_index;
|
| 564 |
} |
| 565 |
|
| 566 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
| 567 |
{
|
| 568 |
if (whence == SEEK_SET) {
|
| 569 |
/* nothing to do */
|
| 570 |
} else if (whence == SEEK_CUR) { |
| 571 |
pos += qemu_ftell(f); |
| 572 |
} else {
|
| 573 |
/* SEEK_END not supported */
|
| 574 |
return -1; |
| 575 |
} |
| 576 |
if (f->put_buffer) {
|
| 577 |
qemu_fflush(f); |
| 578 |
f->buf_offset = pos; |
| 579 |
} else {
|
| 580 |
f->buf_offset = pos; |
| 581 |
f->buf_index = 0;
|
| 582 |
f->buf_size = 0;
|
| 583 |
} |
| 584 |
return pos;
|
| 585 |
} |
| 586 |
|
| 587 |
int qemu_file_rate_limit(QEMUFile *f)
|
| 588 |
{
|
| 589 |
if (f->rate_limit)
|
| 590 |
return f->rate_limit(f->opaque);
|
| 591 |
|
| 592 |
return 0; |
| 593 |
} |
| 594 |
|
| 595 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
| 596 |
{
|
| 597 |
/* any failed or completed migration keeps its state to allow probing of
|
| 598 |
* migration data, but has no associated file anymore */
|
| 599 |
if (f && f->set_rate_limit)
|
| 600 |
return f->set_rate_limit(f->opaque, new_rate);
|
| 601 |
|
| 602 |
return 0; |
| 603 |
} |
| 604 |
|
| 605 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 606 |
{
|
| 607 |
qemu_put_byte(f, v >> 8);
|
| 608 |
qemu_put_byte(f, v); |
| 609 |
} |
| 610 |
|
| 611 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 612 |
{
|
| 613 |
qemu_put_byte(f, v >> 24);
|
| 614 |
qemu_put_byte(f, v >> 16);
|
| 615 |
qemu_put_byte(f, v >> 8);
|
| 616 |
qemu_put_byte(f, v); |
| 617 |
} |
| 618 |
|
| 619 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
| 620 |
{
|
| 621 |
qemu_put_be32(f, v >> 32);
|
| 622 |
qemu_put_be32(f, v); |
| 623 |
} |
| 624 |
|
| 625 |
unsigned int qemu_get_be16(QEMUFile *f) |
| 626 |
{
|
| 627 |
unsigned int v; |
| 628 |
v = qemu_get_byte(f) << 8;
|
| 629 |
v |= qemu_get_byte(f); |
| 630 |
return v;
|
| 631 |
} |
| 632 |
|
| 633 |
unsigned int qemu_get_be32(QEMUFile *f) |
| 634 |
{
|
| 635 |
unsigned int v; |
| 636 |
v = qemu_get_byte(f) << 24;
|
| 637 |
v |= qemu_get_byte(f) << 16;
|
| 638 |
v |= qemu_get_byte(f) << 8;
|
| 639 |
v |= qemu_get_byte(f); |
| 640 |
return v;
|
| 641 |
} |
| 642 |
|
| 643 |
uint64_t qemu_get_be64(QEMUFile *f) |
| 644 |
{
|
| 645 |
uint64_t v; |
| 646 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
| 647 |
v |= qemu_get_be32(f); |
| 648 |
return v;
|
| 649 |
} |
| 650 |
|
| 651 |
/* 8 bit int */
|
| 652 |
|
| 653 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
| 654 |
{
|
| 655 |
int8_t *v = pv; |
| 656 |
qemu_get_s8s(f, v); |
| 657 |
return 0; |
| 658 |
} |
| 659 |
|
| 660 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
| 661 |
{
|
| 662 |
int8_t *v = pv; |
| 663 |
qemu_put_s8s(f, v); |
| 664 |
} |
| 665 |
|
| 666 |
const VMStateInfo vmstate_info_int8 = {
|
| 667 |
.name = "int8",
|
| 668 |
.get = get_int8, |
| 669 |
.put = put_int8, |
| 670 |
}; |
| 671 |
|
| 672 |
/* 16 bit int */
|
| 673 |
|
| 674 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
| 675 |
{
|
| 676 |
int16_t *v = pv; |
| 677 |
qemu_get_sbe16s(f, v); |
| 678 |
return 0; |
| 679 |
} |
| 680 |
|
| 681 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
| 682 |
{
|
| 683 |
int16_t *v = pv; |
| 684 |
qemu_put_sbe16s(f, v); |
| 685 |
} |
| 686 |
|
| 687 |
const VMStateInfo vmstate_info_int16 = {
|
| 688 |
.name = "int16",
|
| 689 |
.get = get_int16, |
| 690 |
.put = put_int16, |
| 691 |
}; |
| 692 |
|
| 693 |
/* 32 bit int */
|
| 694 |
|
| 695 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
| 696 |
{
|
| 697 |
int32_t *v = pv; |
| 698 |
qemu_get_sbe32s(f, v); |
| 699 |
return 0; |
| 700 |
} |
| 701 |
|
| 702 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
| 703 |
{
|
| 704 |
int32_t *v = pv; |
| 705 |
qemu_put_sbe32s(f, v); |
| 706 |
} |
| 707 |
|
| 708 |
const VMStateInfo vmstate_info_int32 = {
|
| 709 |
.name = "int32",
|
| 710 |
.get = get_int32, |
| 711 |
.put = put_int32, |
| 712 |
}; |
| 713 |
|
| 714 |
/* 32 bit int. See that the received value is the same than the one
|
| 715 |
in the field */
|
| 716 |
|
| 717 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
| 718 |
{
|
| 719 |
int32_t *v = pv; |
| 720 |
int32_t v2; |
| 721 |
qemu_get_sbe32s(f, &v2); |
| 722 |
|
| 723 |
if (*v == v2)
|
| 724 |
return 0; |
| 725 |
return -EINVAL;
|
| 726 |
} |
| 727 |
|
| 728 |
const VMStateInfo vmstate_info_int32_equal = {
|
| 729 |
.name = "int32 equal",
|
| 730 |
.get = get_int32_equal, |
| 731 |
.put = put_int32, |
| 732 |
}; |
| 733 |
|
| 734 |
/* 32 bit int. See that the received value is the less or the same
|
| 735 |
than the one in the field */
|
| 736 |
|
| 737 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
| 738 |
{
|
| 739 |
int32_t *old = pv; |
| 740 |
int32_t new; |
| 741 |
qemu_get_sbe32s(f, &new); |
| 742 |
|
| 743 |
if (*old <= new)
|
| 744 |
return 0; |
| 745 |
return -EINVAL;
|
| 746 |
} |
| 747 |
|
| 748 |
const VMStateInfo vmstate_info_int32_le = {
|
| 749 |
.name = "int32 equal",
|
| 750 |
.get = get_int32_le, |
| 751 |
.put = put_int32, |
| 752 |
}; |
| 753 |
|
| 754 |
/* 64 bit int */
|
| 755 |
|
| 756 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
| 757 |
{
|
| 758 |
int64_t *v = pv; |
| 759 |
qemu_get_sbe64s(f, v); |
| 760 |
return 0; |
| 761 |
} |
| 762 |
|
| 763 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
| 764 |
{
|
| 765 |
int64_t *v = pv; |
| 766 |
qemu_put_sbe64s(f, v); |
| 767 |
} |
| 768 |
|
| 769 |
const VMStateInfo vmstate_info_int64 = {
|
| 770 |
.name = "int64",
|
| 771 |
.get = get_int64, |
| 772 |
.put = put_int64, |
| 773 |
}; |
| 774 |
|
| 775 |
/* 8 bit unsigned int */
|
| 776 |
|
| 777 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
| 778 |
{
|
| 779 |
uint8_t *v = pv; |
| 780 |
qemu_get_8s(f, v); |
| 781 |
return 0; |
| 782 |
} |
| 783 |
|
| 784 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
| 785 |
{
|
| 786 |
uint8_t *v = pv; |
| 787 |
qemu_put_8s(f, v); |
| 788 |
} |
| 789 |
|
| 790 |
const VMStateInfo vmstate_info_uint8 = {
|
| 791 |
.name = "uint8",
|
| 792 |
.get = get_uint8, |
| 793 |
.put = put_uint8, |
| 794 |
}; |
| 795 |
|
| 796 |
/* 16 bit unsigned int */
|
| 797 |
|
| 798 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
| 799 |
{
|
| 800 |
uint16_t *v = pv; |
| 801 |
qemu_get_be16s(f, v); |
| 802 |
return 0; |
| 803 |
} |
| 804 |
|
| 805 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
| 806 |
{
|
| 807 |
uint16_t *v = pv; |
| 808 |
qemu_put_be16s(f, v); |
| 809 |
} |
| 810 |
|
| 811 |
const VMStateInfo vmstate_info_uint16 = {
|
| 812 |
.name = "uint16",
|
| 813 |
.get = get_uint16, |
| 814 |
.put = put_uint16, |
| 815 |
}; |
| 816 |
|
| 817 |
/* 32 bit unsigned int */
|
| 818 |
|
| 819 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
| 820 |
{
|
| 821 |
uint32_t *v = pv; |
| 822 |
qemu_get_be32s(f, v); |
| 823 |
return 0; |
| 824 |
} |
| 825 |
|
| 826 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
| 827 |
{
|
| 828 |
uint32_t *v = pv; |
| 829 |
qemu_put_be32s(f, v); |
| 830 |
} |
| 831 |
|
| 832 |
const VMStateInfo vmstate_info_uint32 = {
|
| 833 |
.name = "uint32",
|
| 834 |
.get = get_uint32, |
| 835 |
.put = put_uint32, |
| 836 |
}; |
| 837 |
|
| 838 |
/* 64 bit unsigned int */
|
| 839 |
|
| 840 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
| 841 |
{
|
| 842 |
uint64_t *v = pv; |
| 843 |
qemu_get_be64s(f, v); |
| 844 |
return 0; |
| 845 |
} |
| 846 |
|
| 847 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
| 848 |
{
|
| 849 |
uint64_t *v = pv; |
| 850 |
qemu_put_be64s(f, v); |
| 851 |
} |
| 852 |
|
| 853 |
const VMStateInfo vmstate_info_uint64 = {
|
| 854 |
.name = "uint64",
|
| 855 |
.get = get_uint64, |
| 856 |
.put = put_uint64, |
| 857 |
}; |
| 858 |
|
| 859 |
/* 8 bit int. See that the received value is the same than the one
|
| 860 |
in the field */
|
| 861 |
|
| 862 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
| 863 |
{
|
| 864 |
uint8_t *v = pv; |
| 865 |
uint8_t v2; |
| 866 |
qemu_get_8s(f, &v2); |
| 867 |
|
| 868 |
if (*v == v2)
|
| 869 |
return 0; |
| 870 |
return -EINVAL;
|
| 871 |
} |
| 872 |
|
| 873 |
const VMStateInfo vmstate_info_uint8_equal = {
|
| 874 |
.name = "uint8 equal",
|
| 875 |
.get = get_uint8_equal, |
| 876 |
.put = put_uint8, |
| 877 |
}; |
| 878 |
|
| 879 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
| 880 |
in the field */
|
| 881 |
|
| 882 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
| 883 |
{
|
| 884 |
uint16_t *v = pv; |
| 885 |
uint16_t v2; |
| 886 |
qemu_get_be16s(f, &v2); |
| 887 |
|
| 888 |
if (*v == v2)
|
| 889 |
return 0; |
| 890 |
return -EINVAL;
|
| 891 |
} |
| 892 |
|
| 893 |
const VMStateInfo vmstate_info_uint16_equal = {
|
| 894 |
.name = "uint16 equal",
|
| 895 |
.get = get_uint16_equal, |
| 896 |
.put = put_uint16, |
| 897 |
}; |
| 898 |
|
| 899 |
/* timers */
|
| 900 |
|
| 901 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
| 902 |
{
|
| 903 |
QEMUTimer *v = pv; |
| 904 |
qemu_get_timer(f, v); |
| 905 |
return 0; |
| 906 |
} |
| 907 |
|
| 908 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
| 909 |
{
|
| 910 |
QEMUTimer *v = pv; |
| 911 |
qemu_put_timer(f, v); |
| 912 |
} |
| 913 |
|
| 914 |
const VMStateInfo vmstate_info_timer = {
|
| 915 |
.name = "timer",
|
| 916 |
.get = get_timer, |
| 917 |
.put = put_timer, |
| 918 |
}; |
| 919 |
|
| 920 |
/* uint8_t buffers */
|
| 921 |
|
| 922 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
| 923 |
{
|
| 924 |
uint8_t *v = pv; |
| 925 |
qemu_get_buffer(f, v, size); |
| 926 |
return 0; |
| 927 |
} |
| 928 |
|
| 929 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
| 930 |
{
|
| 931 |
uint8_t *v = pv; |
| 932 |
qemu_put_buffer(f, v, size); |
| 933 |
} |
| 934 |
|
| 935 |
const VMStateInfo vmstate_info_buffer = {
|
| 936 |
.name = "buffer",
|
| 937 |
.get = get_buffer, |
| 938 |
.put = put_buffer, |
| 939 |
}; |
| 940 |
|
| 941 |
/* unused buffers: space that was used for some fields that are
|
| 942 |
not usefull anymore */
|
| 943 |
|
| 944 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 945 |
{
|
| 946 |
qemu_fseek(f, size, SEEK_CUR); |
| 947 |
return 0; |
| 948 |
} |
| 949 |
|
| 950 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 951 |
{
|
| 952 |
qemu_fseek(f, size, SEEK_CUR); |
| 953 |
} |
| 954 |
|
| 955 |
const VMStateInfo vmstate_info_unused_buffer = {
|
| 956 |
.name = "unused_buffer",
|
| 957 |
.get = get_unused_buffer, |
| 958 |
.put = put_unused_buffer, |
| 959 |
}; |
| 960 |
|
| 961 |
typedef struct SaveStateEntry { |
| 962 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
| 963 |
char idstr[256]; |
| 964 |
int instance_id;
|
| 965 |
int version_id;
|
| 966 |
int section_id;
|
| 967 |
SaveLiveStateHandler *save_live_state; |
| 968 |
SaveStateHandler *save_state; |
| 969 |
LoadStateHandler *load_state; |
| 970 |
const VMStateDescription *vmsd;
|
| 971 |
void *opaque;
|
| 972 |
} SaveStateEntry; |
| 973 |
|
| 974 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
| 975 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
| 976 |
static int global_section_id; |
| 977 |
|
| 978 |
static int calculate_new_instance_id(const char *idstr) |
| 979 |
{
|
| 980 |
SaveStateEntry *se; |
| 981 |
int instance_id = 0; |
| 982 |
|
| 983 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 984 |
if (strcmp(idstr, se->idstr) == 0 |
| 985 |
&& instance_id <= se->instance_id) {
|
| 986 |
instance_id = se->instance_id + 1;
|
| 987 |
} |
| 988 |
} |
| 989 |
return instance_id;
|
| 990 |
} |
| 991 |
|
| 992 |
/* TODO: Individual devices generally have very little idea about the rest
|
| 993 |
of the system, so instance_id should be removed/replaced.
|
| 994 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
| 995 |
distinguishing id for all instances of your device class. */
|
| 996 |
int register_savevm_live(const char *idstr, |
| 997 |
int instance_id,
|
| 998 |
int version_id,
|
| 999 |
SaveLiveStateHandler *save_live_state, |
| 1000 |
SaveStateHandler *save_state, |
| 1001 |
LoadStateHandler *load_state, |
| 1002 |
void *opaque)
|
| 1003 |
{
|
| 1004 |
SaveStateEntry *se; |
| 1005 |
|
| 1006 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
| 1007 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
| 1008 |
se->version_id = version_id; |
| 1009 |
se->section_id = global_section_id++; |
| 1010 |
se->save_live_state = save_live_state; |
| 1011 |
se->save_state = save_state; |
| 1012 |
se->load_state = load_state; |
| 1013 |
se->opaque = opaque; |
| 1014 |
se->vmsd = NULL;
|
| 1015 |
|
| 1016 |
if (instance_id == -1) { |
| 1017 |
se->instance_id = calculate_new_instance_id(idstr); |
| 1018 |
} else {
|
| 1019 |
se->instance_id = instance_id; |
| 1020 |
} |
| 1021 |
/* add at the end of list */
|
| 1022 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| 1023 |
return 0; |
| 1024 |
} |
| 1025 |
|
| 1026 |
int register_savevm(const char *idstr, |
| 1027 |
int instance_id,
|
| 1028 |
int version_id,
|
| 1029 |
SaveStateHandler *save_state, |
| 1030 |
LoadStateHandler *load_state, |
| 1031 |
void *opaque)
|
| 1032 |
{
|
| 1033 |
return register_savevm_live(idstr, instance_id, version_id,
|
| 1034 |
NULL, save_state, load_state, opaque);
|
| 1035 |
} |
| 1036 |
|
| 1037 |
void unregister_savevm(const char *idstr, void *opaque) |
| 1038 |
{
|
| 1039 |
SaveStateEntry *se, *new_se; |
| 1040 |
|
| 1041 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
| 1042 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
| 1043 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| 1044 |
qemu_free(se); |
| 1045 |
} |
| 1046 |
} |
| 1047 |
} |
| 1048 |
|
| 1049 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
| 1050 |
void *opaque)
|
| 1051 |
{
|
| 1052 |
SaveStateEntry *se; |
| 1053 |
|
| 1054 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
| 1055 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
| 1056 |
se->version_id = vmsd->version_id; |
| 1057 |
se->section_id = global_section_id++; |
| 1058 |
se->save_live_state = NULL;
|
| 1059 |
se->save_state = NULL;
|
| 1060 |
se->load_state = NULL;
|
| 1061 |
se->opaque = opaque; |
| 1062 |
se->vmsd = vmsd; |
| 1063 |
|
| 1064 |
if (instance_id == -1) { |
| 1065 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
| 1066 |
} else {
|
| 1067 |
se->instance_id = instance_id; |
| 1068 |
} |
| 1069 |
/* add at the end of list */
|
| 1070 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| 1071 |
return 0; |
| 1072 |
} |
| 1073 |
|
| 1074 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
| 1075 |
{
|
| 1076 |
SaveStateEntry *se, *new_se; |
| 1077 |
|
| 1078 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
| 1079 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
| 1080 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| 1081 |
qemu_free(se); |
| 1082 |
} |
| 1083 |
} |
| 1084 |
} |
| 1085 |
|
| 1086 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 1087 |
void *opaque, int version_id) |
| 1088 |
{
|
| 1089 |
VMStateField *field = vmsd->fields; |
| 1090 |
|
| 1091 |
if (version_id > vmsd->version_id) {
|
| 1092 |
return -EINVAL;
|
| 1093 |
} |
| 1094 |
if (version_id < vmsd->minimum_version_id_old) {
|
| 1095 |
return -EINVAL;
|
| 1096 |
} |
| 1097 |
if (version_id < vmsd->minimum_version_id) {
|
| 1098 |
return vmsd->load_state_old(f, opaque, version_id);
|
| 1099 |
} |
| 1100 |
if (vmsd->pre_load) {
|
| 1101 |
int ret = vmsd->pre_load(opaque);
|
| 1102 |
if (ret)
|
| 1103 |
return ret;
|
| 1104 |
} |
| 1105 |
while(field->name) {
|
| 1106 |
if ((field->field_exists &&
|
| 1107 |
field->field_exists(opaque, version_id)) || |
| 1108 |
(!field->field_exists && |
| 1109 |
field->version_id <= version_id)) {
|
| 1110 |
void *base_addr = opaque + field->offset;
|
| 1111 |
int ret, i, n_elems = 1; |
| 1112 |
|
| 1113 |
if (field->flags & VMS_ARRAY) {
|
| 1114 |
n_elems = field->num; |
| 1115 |
} else if (field->flags & VMS_VARRAY_INT32) { |
| 1116 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
| 1117 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
| 1118 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 1119 |
} |
| 1120 |
if (field->flags & VMS_POINTER) {
|
| 1121 |
base_addr = *(void **)base_addr;
|
| 1122 |
} |
| 1123 |
for (i = 0; i < n_elems; i++) { |
| 1124 |
void *addr = base_addr + field->size * i;
|
| 1125 |
|
| 1126 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
| 1127 |
addr = *(void **)addr;
|
| 1128 |
} |
| 1129 |
if (field->flags & VMS_STRUCT) {
|
| 1130 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
| 1131 |
} else {
|
| 1132 |
ret = field->info->get(f, addr, field->size); |
| 1133 |
|
| 1134 |
} |
| 1135 |
if (ret < 0) { |
| 1136 |
return ret;
|
| 1137 |
} |
| 1138 |
} |
| 1139 |
} |
| 1140 |
field++; |
| 1141 |
} |
| 1142 |
if (vmsd->post_load) {
|
| 1143 |
return vmsd->post_load(opaque, version_id);
|
| 1144 |
} |
| 1145 |
return 0; |
| 1146 |
} |
| 1147 |
|
| 1148 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 1149 |
void *opaque)
|
| 1150 |
{
|
| 1151 |
VMStateField *field = vmsd->fields; |
| 1152 |
|
| 1153 |
if (vmsd->pre_save) {
|
| 1154 |
vmsd->pre_save(opaque); |
| 1155 |
} |
| 1156 |
while(field->name) {
|
| 1157 |
if (!field->field_exists ||
|
| 1158 |
field->field_exists(opaque, vmsd->version_id)) {
|
| 1159 |
void *base_addr = opaque + field->offset;
|
| 1160 |
int i, n_elems = 1; |
| 1161 |
|
| 1162 |
if (field->flags & VMS_ARRAY) {
|
| 1163 |
n_elems = field->num; |
| 1164 |
} else if (field->flags & VMS_VARRAY_INT32) { |
| 1165 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
| 1166 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
| 1167 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 1168 |
} |
| 1169 |
if (field->flags & VMS_POINTER) {
|
| 1170 |
base_addr = *(void **)base_addr;
|
| 1171 |
} |
| 1172 |
for (i = 0; i < n_elems; i++) { |
| 1173 |
void *addr = base_addr + field->size * i;
|
| 1174 |
|
| 1175 |
if (field->flags & VMS_STRUCT) {
|
| 1176 |
vmstate_save_state(f, field->vmsd, addr); |
| 1177 |
} else {
|
| 1178 |
field->info->put(f, addr, field->size); |
| 1179 |
} |
| 1180 |
} |
| 1181 |
} |
| 1182 |
field++; |
| 1183 |
} |
| 1184 |
if (vmsd->post_save) {
|
| 1185 |
vmsd->post_save(opaque); |
| 1186 |
} |
| 1187 |
} |
| 1188 |
|
| 1189 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
| 1190 |
{
|
| 1191 |
if (!se->vmsd) { /* Old style */ |
| 1192 |
return se->load_state(f, se->opaque, version_id);
|
| 1193 |
} |
| 1194 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
| 1195 |
} |
| 1196 |
|
| 1197 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
| 1198 |
{
|
| 1199 |
if (!se->vmsd) { /* Old style */ |
| 1200 |
se->save_state(f, se->opaque); |
| 1201 |
return;
|
| 1202 |
} |
| 1203 |
vmstate_save_state(f,se->vmsd, se->opaque); |
| 1204 |
} |
| 1205 |
|
| 1206 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
| 1207 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 1208 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
| 1209 |
|
| 1210 |
#define QEMU_VM_EOF 0x00 |
| 1211 |
#define QEMU_VM_SECTION_START 0x01 |
| 1212 |
#define QEMU_VM_SECTION_PART 0x02 |
| 1213 |
#define QEMU_VM_SECTION_END 0x03 |
| 1214 |
#define QEMU_VM_SECTION_FULL 0x04 |
| 1215 |
|
| 1216 |
int qemu_savevm_state_begin(QEMUFile *f)
|
| 1217 |
{
|
| 1218 |
SaveStateEntry *se; |
| 1219 |
|
| 1220 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 1221 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 1222 |
|
| 1223 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1224 |
int len;
|
| 1225 |
|
| 1226 |
if (se->save_live_state == NULL) |
| 1227 |
continue;
|
| 1228 |
|
| 1229 |
/* Section type */
|
| 1230 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 1231 |
qemu_put_be32(f, se->section_id); |
| 1232 |
|
| 1233 |
/* ID string */
|
| 1234 |
len = strlen(se->idstr); |
| 1235 |
qemu_put_byte(f, len); |
| 1236 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 1237 |
|
| 1238 |
qemu_put_be32(f, se->instance_id); |
| 1239 |
qemu_put_be32(f, se->version_id); |
| 1240 |
|
| 1241 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 1242 |
} |
| 1243 |
|
| 1244 |
if (qemu_file_has_error(f))
|
| 1245 |
return -EIO;
|
| 1246 |
|
| 1247 |
return 0; |
| 1248 |
} |
| 1249 |
|
| 1250 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
| 1251 |
{
|
| 1252 |
SaveStateEntry *se; |
| 1253 |
int ret = 1; |
| 1254 |
|
| 1255 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1256 |
if (se->save_live_state == NULL) |
| 1257 |
continue;
|
| 1258 |
|
| 1259 |
/* Section type */
|
| 1260 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 1261 |
qemu_put_be32(f, se->section_id); |
| 1262 |
|
| 1263 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 1264 |
} |
| 1265 |
|
| 1266 |
if (ret)
|
| 1267 |
return 1; |
| 1268 |
|
| 1269 |
if (qemu_file_has_error(f))
|
| 1270 |
return -EIO;
|
| 1271 |
|
| 1272 |
return 0; |
| 1273 |
} |
| 1274 |
|
| 1275 |
int qemu_savevm_state_complete(QEMUFile *f)
|
| 1276 |
{
|
| 1277 |
SaveStateEntry *se; |
| 1278 |
|
| 1279 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1280 |
if (se->save_live_state == NULL) |
| 1281 |
continue;
|
| 1282 |
|
| 1283 |
/* Section type */
|
| 1284 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 1285 |
qemu_put_be32(f, se->section_id); |
| 1286 |
|
| 1287 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 1288 |
} |
| 1289 |
|
| 1290 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1291 |
int len;
|
| 1292 |
|
| 1293 |
if (se->save_state == NULL && se->vmsd == NULL) |
| 1294 |
continue;
|
| 1295 |
|
| 1296 |
/* Section type */
|
| 1297 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 1298 |
qemu_put_be32(f, se->section_id); |
| 1299 |
|
| 1300 |
/* ID string */
|
| 1301 |
len = strlen(se->idstr); |
| 1302 |
qemu_put_byte(f, len); |
| 1303 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 1304 |
|
| 1305 |
qemu_put_be32(f, se->instance_id); |
| 1306 |
qemu_put_be32(f, se->version_id); |
| 1307 |
|
| 1308 |
vmstate_save(f, se); |
| 1309 |
} |
| 1310 |
|
| 1311 |
qemu_put_byte(f, QEMU_VM_EOF); |
| 1312 |
|
| 1313 |
if (qemu_file_has_error(f))
|
| 1314 |
return -EIO;
|
| 1315 |
|
| 1316 |
return 0; |
| 1317 |
} |
| 1318 |
|
| 1319 |
int qemu_savevm_state(QEMUFile *f)
|
| 1320 |
{
|
| 1321 |
int saved_vm_running;
|
| 1322 |
int ret;
|
| 1323 |
|
| 1324 |
saved_vm_running = vm_running; |
| 1325 |
vm_stop(0);
|
| 1326 |
|
| 1327 |
bdrv_flush_all(); |
| 1328 |
|
| 1329 |
ret = qemu_savevm_state_begin(f); |
| 1330 |
if (ret < 0) |
| 1331 |
goto out;
|
| 1332 |
|
| 1333 |
do {
|
| 1334 |
ret = qemu_savevm_state_iterate(f); |
| 1335 |
if (ret < 0) |
| 1336 |
goto out;
|
| 1337 |
} while (ret == 0); |
| 1338 |
|
| 1339 |
ret = qemu_savevm_state_complete(f); |
| 1340 |
|
| 1341 |
out:
|
| 1342 |
if (qemu_file_has_error(f))
|
| 1343 |
ret = -EIO; |
| 1344 |
|
| 1345 |
if (!ret && saved_vm_running)
|
| 1346 |
vm_start(); |
| 1347 |
|
| 1348 |
return ret;
|
| 1349 |
} |
| 1350 |
|
| 1351 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 1352 |
{
|
| 1353 |
SaveStateEntry *se; |
| 1354 |
|
| 1355 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1356 |
if (!strcmp(se->idstr, idstr) &&
|
| 1357 |
instance_id == se->instance_id) |
| 1358 |
return se;
|
| 1359 |
} |
| 1360 |
return NULL; |
| 1361 |
} |
| 1362 |
|
| 1363 |
typedef struct LoadStateEntry { |
| 1364 |
QLIST_ENTRY(LoadStateEntry) entry; |
| 1365 |
SaveStateEntry *se; |
| 1366 |
int section_id;
|
| 1367 |
int version_id;
|
| 1368 |
} LoadStateEntry; |
| 1369 |
|
| 1370 |
int qemu_loadvm_state(QEMUFile *f)
|
| 1371 |
{
|
| 1372 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
| 1373 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
| 1374 |
LoadStateEntry *le, *new_le; |
| 1375 |
uint8_t section_type; |
| 1376 |
unsigned int v; |
| 1377 |
int ret;
|
| 1378 |
|
| 1379 |
v = qemu_get_be32(f); |
| 1380 |
if (v != QEMU_VM_FILE_MAGIC)
|
| 1381 |
return -EINVAL;
|
| 1382 |
|
| 1383 |
v = qemu_get_be32(f); |
| 1384 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
| 1385 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
| 1386 |
return -ENOTSUP;
|
| 1387 |
} |
| 1388 |
if (v != QEMU_VM_FILE_VERSION)
|
| 1389 |
return -ENOTSUP;
|
| 1390 |
|
| 1391 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
| 1392 |
uint32_t instance_id, version_id, section_id; |
| 1393 |
SaveStateEntry *se; |
| 1394 |
char idstr[257]; |
| 1395 |
int len;
|
| 1396 |
|
| 1397 |
switch (section_type) {
|
| 1398 |
case QEMU_VM_SECTION_START:
|
| 1399 |
case QEMU_VM_SECTION_FULL:
|
| 1400 |
/* Read section start */
|
| 1401 |
section_id = qemu_get_be32(f); |
| 1402 |
len = qemu_get_byte(f); |
| 1403 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 1404 |
idstr[len] = 0;
|
| 1405 |
instance_id = qemu_get_be32(f); |
| 1406 |
version_id = qemu_get_be32(f); |
| 1407 |
|
| 1408 |
/* Find savevm section */
|
| 1409 |
se = find_se(idstr, instance_id); |
| 1410 |
if (se == NULL) { |
| 1411 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
| 1412 |
ret = -EINVAL; |
| 1413 |
goto out;
|
| 1414 |
} |
| 1415 |
|
| 1416 |
/* Validate version */
|
| 1417 |
if (version_id > se->version_id) {
|
| 1418 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
| 1419 |
version_id, idstr, se->version_id); |
| 1420 |
ret = -EINVAL; |
| 1421 |
goto out;
|
| 1422 |
} |
| 1423 |
|
| 1424 |
/* Add entry */
|
| 1425 |
le = qemu_mallocz(sizeof(*le));
|
| 1426 |
|
| 1427 |
le->se = se; |
| 1428 |
le->section_id = section_id; |
| 1429 |
le->version_id = version_id; |
| 1430 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
| 1431 |
|
| 1432 |
ret = vmstate_load(f, le->se, le->version_id); |
| 1433 |
if (ret < 0) { |
| 1434 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
| 1435 |
instance_id, idstr); |
| 1436 |
goto out;
|
| 1437 |
} |
| 1438 |
break;
|
| 1439 |
case QEMU_VM_SECTION_PART:
|
| 1440 |
case QEMU_VM_SECTION_END:
|
| 1441 |
section_id = qemu_get_be32(f); |
| 1442 |
|
| 1443 |
QLIST_FOREACH(le, &loadvm_handlers, entry) {
|
| 1444 |
if (le->section_id == section_id) {
|
| 1445 |
break;
|
| 1446 |
} |
| 1447 |
} |
| 1448 |
if (le == NULL) { |
| 1449 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
| 1450 |
ret = -EINVAL; |
| 1451 |
goto out;
|
| 1452 |
} |
| 1453 |
|
| 1454 |
ret = vmstate_load(f, le->se, le->version_id); |
| 1455 |
if (ret < 0) { |
| 1456 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
| 1457 |
section_id); |
| 1458 |
goto out;
|
| 1459 |
} |
| 1460 |
break;
|
| 1461 |
default:
|
| 1462 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
| 1463 |
ret = -EINVAL; |
| 1464 |
goto out;
|
| 1465 |
} |
| 1466 |
} |
| 1467 |
|
| 1468 |
ret = 0;
|
| 1469 |
|
| 1470 |
out:
|
| 1471 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
|
| 1472 |
QLIST_REMOVE(le, entry); |
| 1473 |
qemu_free(le); |
| 1474 |
} |
| 1475 |
|
| 1476 |
if (qemu_file_has_error(f))
|
| 1477 |
ret = -EIO; |
| 1478 |
|
| 1479 |
return ret;
|
| 1480 |
} |
| 1481 |
|
| 1482 |
/* device can contain snapshots */
|
| 1483 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
| 1484 |
{
|
| 1485 |
return (bs &&
|
| 1486 |
!bdrv_is_removable(bs) && |
| 1487 |
!bdrv_is_read_only(bs)); |
| 1488 |
} |
| 1489 |
|
| 1490 |
/* device must be snapshots in order to have a reliable snapshot */
|
| 1491 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
| 1492 |
{
|
| 1493 |
return (bs &&
|
| 1494 |
!bdrv_is_removable(bs) && |
| 1495 |
!bdrv_is_read_only(bs)); |
| 1496 |
} |
| 1497 |
|
| 1498 |
static BlockDriverState *get_bs_snapshots(void) |
| 1499 |
{
|
| 1500 |
BlockDriverState *bs; |
| 1501 |
DriveInfo *dinfo; |
| 1502 |
|
| 1503 |
if (bs_snapshots)
|
| 1504 |
return bs_snapshots;
|
| 1505 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1506 |
bs = dinfo->bdrv; |
| 1507 |
if (bdrv_can_snapshot(bs))
|
| 1508 |
goto ok;
|
| 1509 |
} |
| 1510 |
return NULL; |
| 1511 |
ok:
|
| 1512 |
bs_snapshots = bs; |
| 1513 |
return bs;
|
| 1514 |
} |
| 1515 |
|
| 1516 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 1517 |
const char *name) |
| 1518 |
{
|
| 1519 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1520 |
int nb_sns, i, ret;
|
| 1521 |
|
| 1522 |
ret = -ENOENT; |
| 1523 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1524 |
if (nb_sns < 0) |
| 1525 |
return ret;
|
| 1526 |
for(i = 0; i < nb_sns; i++) { |
| 1527 |
sn = &sn_tab[i]; |
| 1528 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
| 1529 |
*sn_info = *sn; |
| 1530 |
ret = 0;
|
| 1531 |
break;
|
| 1532 |
} |
| 1533 |
} |
| 1534 |
qemu_free(sn_tab); |
| 1535 |
return ret;
|
| 1536 |
} |
| 1537 |
|
| 1538 |
/*
|
| 1539 |
* Deletes snapshots of a given name in all opened images.
|
| 1540 |
*/
|
| 1541 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
| 1542 |
{
|
| 1543 |
BlockDriverState *bs; |
| 1544 |
DriveInfo *dinfo; |
| 1545 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
| 1546 |
int ret;
|
| 1547 |
|
| 1548 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1549 |
bs = dinfo->bdrv; |
| 1550 |
if (bdrv_can_snapshot(bs) &&
|
| 1551 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
| 1552 |
{
|
| 1553 |
ret = bdrv_snapshot_delete(bs, name); |
| 1554 |
if (ret < 0) { |
| 1555 |
monitor_printf(mon, |
| 1556 |
"Error while deleting snapshot on '%s'\n",
|
| 1557 |
bdrv_get_device_name(bs)); |
| 1558 |
return -1; |
| 1559 |
} |
| 1560 |
} |
| 1561 |
} |
| 1562 |
|
| 1563 |
return 0; |
| 1564 |
} |
| 1565 |
|
| 1566 |
void do_savevm(Monitor *mon, const QDict *qdict) |
| 1567 |
{
|
| 1568 |
DriveInfo *dinfo; |
| 1569 |
BlockDriverState *bs, *bs1; |
| 1570 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1571 |
int ret;
|
| 1572 |
QEMUFile *f; |
| 1573 |
int saved_vm_running;
|
| 1574 |
uint32_t vm_state_size; |
| 1575 |
#ifdef _WIN32
|
| 1576 |
struct _timeb tb;
|
| 1577 |
#else
|
| 1578 |
struct timeval tv;
|
| 1579 |
#endif
|
| 1580 |
const char *name = qdict_get_try_str(qdict, "name"); |
| 1581 |
|
| 1582 |
bs = get_bs_snapshots(); |
| 1583 |
if (!bs) {
|
| 1584 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
| 1585 |
return;
|
| 1586 |
} |
| 1587 |
|
| 1588 |
/* ??? Should this occur after vm_stop? */
|
| 1589 |
qemu_aio_flush(); |
| 1590 |
|
| 1591 |
saved_vm_running = vm_running; |
| 1592 |
vm_stop(0);
|
| 1593 |
|
| 1594 |
memset(sn, 0, sizeof(*sn)); |
| 1595 |
if (name) {
|
| 1596 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1597 |
if (ret >= 0) { |
| 1598 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
| 1599 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
| 1600 |
} else {
|
| 1601 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
| 1602 |
} |
| 1603 |
} |
| 1604 |
|
| 1605 |
/* fill auxiliary fields */
|
| 1606 |
#ifdef _WIN32
|
| 1607 |
_ftime(&tb); |
| 1608 |
sn->date_sec = tb.time; |
| 1609 |
sn->date_nsec = tb.millitm * 1000000;
|
| 1610 |
#else
|
| 1611 |
gettimeofday(&tv, NULL);
|
| 1612 |
sn->date_sec = tv.tv_sec; |
| 1613 |
sn->date_nsec = tv.tv_usec * 1000;
|
| 1614 |
#endif
|
| 1615 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1616 |
|
| 1617 |
/* Delete old snapshots of the same name */
|
| 1618 |
if (del_existing_snapshots(mon, name) < 0) { |
| 1619 |
goto the_end;
|
| 1620 |
} |
| 1621 |
|
| 1622 |
/* save the VM state */
|
| 1623 |
f = qemu_fopen_bdrv(bs, 1);
|
| 1624 |
if (!f) {
|
| 1625 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1626 |
goto the_end;
|
| 1627 |
} |
| 1628 |
ret = qemu_savevm_state(f); |
| 1629 |
vm_state_size = qemu_ftell(f); |
| 1630 |
qemu_fclose(f); |
| 1631 |
if (ret < 0) { |
| 1632 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
| 1633 |
goto the_end;
|
| 1634 |
} |
| 1635 |
|
| 1636 |
/* create the snapshots */
|
| 1637 |
|
| 1638 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1639 |
bs1 = dinfo->bdrv; |
| 1640 |
if (bdrv_has_snapshot(bs1)) {
|
| 1641 |
/* Write VM state size only to the image that contains the state */
|
| 1642 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
| 1643 |
ret = bdrv_snapshot_create(bs1, sn); |
| 1644 |
if (ret < 0) { |
| 1645 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
| 1646 |
bdrv_get_device_name(bs1)); |
| 1647 |
} |
| 1648 |
} |
| 1649 |
} |
| 1650 |
|
| 1651 |
the_end:
|
| 1652 |
if (saved_vm_running)
|
| 1653 |
vm_start(); |
| 1654 |
} |
| 1655 |
|
| 1656 |
int load_vmstate(Monitor *mon, const char *name) |
| 1657 |
{
|
| 1658 |
DriveInfo *dinfo; |
| 1659 |
BlockDriverState *bs, *bs1; |
| 1660 |
QEMUSnapshotInfo sn; |
| 1661 |
QEMUFile *f; |
| 1662 |
int ret;
|
| 1663 |
|
| 1664 |
bs = get_bs_snapshots(); |
| 1665 |
if (!bs) {
|
| 1666 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1667 |
return -EINVAL;
|
| 1668 |
} |
| 1669 |
|
| 1670 |
/* Flush all IO requests so they don't interfere with the new state. */
|
| 1671 |
qemu_aio_flush(); |
| 1672 |
|
| 1673 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1674 |
bs1 = dinfo->bdrv; |
| 1675 |
if (bdrv_has_snapshot(bs1)) {
|
| 1676 |
ret = bdrv_snapshot_goto(bs1, name); |
| 1677 |
if (ret < 0) { |
| 1678 |
if (bs != bs1)
|
| 1679 |
monitor_printf(mon, "Warning: ");
|
| 1680 |
switch(ret) {
|
| 1681 |
case -ENOTSUP:
|
| 1682 |
monitor_printf(mon, |
| 1683 |
"Snapshots not supported on device '%s'\n",
|
| 1684 |
bdrv_get_device_name(bs1)); |
| 1685 |
break;
|
| 1686 |
case -ENOENT:
|
| 1687 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
| 1688 |
"device '%s'\n",
|
| 1689 |
name, bdrv_get_device_name(bs1)); |
| 1690 |
break;
|
| 1691 |
default:
|
| 1692 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
| 1693 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1694 |
break;
|
| 1695 |
} |
| 1696 |
/* fatal on snapshot block device */
|
| 1697 |
if (bs == bs1)
|
| 1698 |
return 0; |
| 1699 |
} |
| 1700 |
} |
| 1701 |
} |
| 1702 |
|
| 1703 |
/* Don't even try to load empty VM states */
|
| 1704 |
ret = bdrv_snapshot_find(bs, &sn, name); |
| 1705 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1706 |
return -EINVAL;
|
| 1707 |
|
| 1708 |
/* restore the VM state */
|
| 1709 |
f = qemu_fopen_bdrv(bs, 0);
|
| 1710 |
if (!f) {
|
| 1711 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1712 |
return -EINVAL;
|
| 1713 |
} |
| 1714 |
ret = qemu_loadvm_state(f); |
| 1715 |
qemu_fclose(f); |
| 1716 |
if (ret < 0) { |
| 1717 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
| 1718 |
return ret;
|
| 1719 |
} |
| 1720 |
return 0; |
| 1721 |
} |
| 1722 |
|
| 1723 |
void do_delvm(Monitor *mon, const QDict *qdict) |
| 1724 |
{
|
| 1725 |
DriveInfo *dinfo; |
| 1726 |
BlockDriverState *bs, *bs1; |
| 1727 |
int ret;
|
| 1728 |
const char *name = qdict_get_str(qdict, "name"); |
| 1729 |
|
| 1730 |
bs = get_bs_snapshots(); |
| 1731 |
if (!bs) {
|
| 1732 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1733 |
return;
|
| 1734 |
} |
| 1735 |
|
| 1736 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1737 |
bs1 = dinfo->bdrv; |
| 1738 |
if (bdrv_has_snapshot(bs1)) {
|
| 1739 |
ret = bdrv_snapshot_delete(bs1, name); |
| 1740 |
if (ret < 0) { |
| 1741 |
if (ret == -ENOTSUP)
|
| 1742 |
monitor_printf(mon, |
| 1743 |
"Snapshots not supported on device '%s'\n",
|
| 1744 |
bdrv_get_device_name(bs1)); |
| 1745 |
else
|
| 1746 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
| 1747 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1748 |
} |
| 1749 |
} |
| 1750 |
} |
| 1751 |
} |
| 1752 |
|
| 1753 |
void do_info_snapshots(Monitor *mon)
|
| 1754 |
{
|
| 1755 |
DriveInfo *dinfo; |
| 1756 |
BlockDriverState *bs, *bs1; |
| 1757 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1758 |
int nb_sns, i;
|
| 1759 |
char buf[256]; |
| 1760 |
|
| 1761 |
bs = get_bs_snapshots(); |
| 1762 |
if (!bs) {
|
| 1763 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
| 1764 |
return;
|
| 1765 |
} |
| 1766 |
monitor_printf(mon, "Snapshot devices:");
|
| 1767 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 1768 |
bs1 = dinfo->bdrv; |
| 1769 |
if (bdrv_has_snapshot(bs1)) {
|
| 1770 |
if (bs == bs1)
|
| 1771 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
| 1772 |
} |
| 1773 |
} |
| 1774 |
monitor_printf(mon, "\n");
|
| 1775 |
|
| 1776 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1777 |
if (nb_sns < 0) { |
| 1778 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
| 1779 |
return;
|
| 1780 |
} |
| 1781 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
| 1782 |
bdrv_get_device_name(bs)); |
| 1783 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1784 |
for(i = 0; i < nb_sns; i++) { |
| 1785 |
sn = &sn_tab[i]; |
| 1786 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1787 |
} |
| 1788 |
qemu_free(sn_tab); |
| 1789 |
} |