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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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* 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 <time.h> |
| 27 |
#include <errno.h> |
| 28 |
#include <sys/time.h> |
| 29 |
#include <zlib.h> |
| 30 |
|
| 31 |
/* Needed early for CONFIG_BSD etc. */
|
| 32 |
#include "config-host.h" |
| 33 |
|
| 34 |
#ifndef _WIN32
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#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> |
| 44 |
#include <arpa/inet.h> |
| 45 |
#include <dirent.h> |
| 46 |
#include <netdb.h> |
| 47 |
#include <sys/select.h> |
| 48 |
#ifdef CONFIG_BSD
|
| 49 |
#include <sys/stat.h> |
| 50 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
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#include <libutil.h> |
| 52 |
#else
|
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#include <util.h> |
| 54 |
#endif
|
| 55 |
#ifdef __linux__
|
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#include <pty.h> |
| 57 |
#include <malloc.h> |
| 58 |
#include <linux/rtc.h> |
| 59 |
#endif
|
| 60 |
#endif
|
| 61 |
#endif
|
| 62 |
|
| 63 |
#ifdef _WIN32
|
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#include <windows.h> |
| 65 |
#include <malloc.h> |
| 66 |
#include <sys/timeb.h> |
| 67 |
#include <mmsystem.h> |
| 68 |
#define getopt_long_only getopt_long
|
| 69 |
#define memalign(align, size) malloc(size)
|
| 70 |
#endif
|
| 71 |
|
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#include "qemu-common.h" |
| 73 |
#include "hw/hw.h" |
| 74 |
#include "hw/qdev.h" |
| 75 |
#include "net.h" |
| 76 |
#include "monitor.h" |
| 77 |
#include "sysemu.h" |
| 78 |
#include "qemu-timer.h" |
| 79 |
#include "qemu-char.h" |
| 80 |
#include "audio/audio.h" |
| 81 |
#include "migration.h" |
| 82 |
#include "qemu_socket.h" |
| 83 |
#include "qemu-queue.h" |
| 84 |
#include "qemu-timer.h" |
| 85 |
#include "cpus.h" |
| 86 |
#include "memory.h" |
| 87 |
#include "qmp-commands.h" |
| 88 |
#include "trace.h" |
| 89 |
|
| 90 |
#define SELF_ANNOUNCE_ROUNDS 5 |
| 91 |
|
| 92 |
#ifndef ETH_P_RARP
|
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#define ETH_P_RARP 0x8035 |
| 94 |
#endif
|
| 95 |
#define ARP_HTYPE_ETH 0x0001 |
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#define ARP_PTYPE_IP 0x0800 |
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#define ARP_OP_REQUEST_REV 0x3 |
| 98 |
|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{
|
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/* Ethernet header. */
|
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memset(buf, 0xff, 6); /* destination MAC addr */ |
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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 */ |
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memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
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memset(buf + 28, 0x00, 4); /* source protocol addr */ |
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memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
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memset(buf + 38, 0x00, 4); /* target protocol addr */ |
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|
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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); |
| 120 |
|
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return 60; /* len (FCS will be added by hardware) */ |
| 122 |
} |
| 123 |
|
| 124 |
static void qemu_announce_self_iter(NICState *nic, void *opaque) |
| 125 |
{
|
| 126 |
uint8_t buf[60];
|
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int len;
|
| 128 |
|
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len = announce_self_create(buf, nic->conf->macaddr.a); |
| 130 |
|
| 131 |
qemu_send_packet_raw(&nic->nc, buf, len); |
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} |
| 133 |
|
| 134 |
|
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static void qemu_announce_self_once(void *opaque) |
| 136 |
{
|
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static int count = SELF_ANNOUNCE_ROUNDS; |
| 138 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
| 139 |
|
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qemu_foreach_nic(qemu_announce_self_iter, NULL);
|
| 141 |
|
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if (--count) {
|
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/* delay 50ms, 150ms, 250ms, ... */
|
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qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
| 145 |
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
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} else {
|
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qemu_del_timer(timer); |
| 148 |
qemu_free_timer(timer); |
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} |
| 150 |
} |
| 151 |
|
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void qemu_announce_self(void) |
| 153 |
{
|
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static QEMUTimer *timer;
|
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timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
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qemu_announce_self_once(&timer); |
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} |
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|
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/***********************************************************/
|
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/* savevm/loadvm support */
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|
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#define IO_BUF_SIZE 32768 |
| 163 |
|
| 164 |
struct QEMUFile {
|
| 165 |
QEMUFilePutBufferFunc *put_buffer; |
| 166 |
QEMUFileGetBufferFunc *get_buffer; |
| 167 |
QEMUFileCloseFunc *close; |
| 168 |
QEMUFileRateLimit *rate_limit; |
| 169 |
QEMUFileSetRateLimit *set_rate_limit; |
| 170 |
QEMUFileGetRateLimit *get_rate_limit; |
| 171 |
void *opaque;
|
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int is_write;
|
| 173 |
|
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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]; |
| 179 |
|
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int last_error;
|
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}; |
| 182 |
|
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typedef struct QEMUFileStdio |
| 184 |
{
|
| 185 |
FILE *stdio_file; |
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QEMUFile *file; |
| 187 |
} QEMUFileStdio; |
| 188 |
|
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typedef struct QEMUFileSocket |
| 190 |
{
|
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int fd;
|
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QEMUFile *file; |
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} QEMUFileSocket; |
| 194 |
|
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static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{
|
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QEMUFileSocket *s = opaque; |
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ssize_t len; |
| 199 |
|
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do {
|
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len = qemu_recv(s->fd, buf, size, 0);
|
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} while (len == -1 && socket_error() == EINTR); |
| 203 |
|
| 204 |
if (len == -1) |
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len = -socket_error(); |
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|
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return len;
|
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} |
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|
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static int socket_close(void *opaque) |
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{
|
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QEMUFileSocket *s = opaque; |
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g_free(s); |
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return 0; |
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} |
| 216 |
|
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static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{
|
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QEMUFileStdio *s = opaque; |
| 220 |
return fwrite(buf, 1, size, s->stdio_file); |
| 221 |
} |
| 222 |
|
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 224 |
{
|
| 225 |
QEMUFileStdio *s = opaque; |
| 226 |
FILE *fp = s->stdio_file; |
| 227 |
int bytes;
|
| 228 |
|
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do {
|
| 230 |
clearerr(fp); |
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bytes = fread(buf, 1, size, fp);
|
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
| 233 |
return bytes;
|
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} |
| 235 |
|
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static int stdio_pclose(void *opaque) |
| 237 |
{
|
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QEMUFileStdio *s = opaque; |
| 239 |
int ret;
|
| 240 |
ret = pclose(s->stdio_file); |
| 241 |
if (ret == -1) { |
| 242 |
ret = -errno; |
| 243 |
} |
| 244 |
g_free(s); |
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return ret;
|
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} |
| 247 |
|
| 248 |
static int stdio_fclose(void *opaque) |
| 249 |
{
|
| 250 |
QEMUFileStdio *s = opaque; |
| 251 |
int ret = 0; |
| 252 |
if (fclose(s->stdio_file) == EOF) { |
| 253 |
ret = -errno; |
| 254 |
} |
| 255 |
g_free(s); |
| 256 |
return ret;
|
| 257 |
} |
| 258 |
|
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QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
| 260 |
{
|
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QEMUFileStdio *s; |
| 262 |
|
| 263 |
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
| 264 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
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return NULL; |
| 266 |
} |
| 267 |
|
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s = g_malloc0(sizeof(QEMUFileStdio));
|
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|
| 270 |
s->stdio_file = stdio_file; |
| 271 |
|
| 272 |
if(mode[0] == 'r') { |
| 273 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
|
| 274 |
NULL, NULL, NULL); |
| 275 |
} else {
|
| 276 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
|
| 277 |
NULL, NULL, NULL); |
| 278 |
} |
| 279 |
return s->file;
|
| 280 |
} |
| 281 |
|
| 282 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
| 283 |
{
|
| 284 |
FILE *popen_file; |
| 285 |
|
| 286 |
popen_file = popen(command, mode); |
| 287 |
if(popen_file == NULL) { |
| 288 |
return NULL; |
| 289 |
} |
| 290 |
|
| 291 |
return qemu_popen(popen_file, mode);
|
| 292 |
} |
| 293 |
|
| 294 |
int qemu_stdio_fd(QEMUFile *f)
|
| 295 |
{
|
| 296 |
QEMUFileStdio *p; |
| 297 |
int fd;
|
| 298 |
|
| 299 |
p = (QEMUFileStdio *)f->opaque; |
| 300 |
fd = fileno(p->stdio_file); |
| 301 |
|
| 302 |
return fd;
|
| 303 |
} |
| 304 |
|
| 305 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
| 306 |
{
|
| 307 |
QEMUFileStdio *s; |
| 308 |
|
| 309 |
if (mode == NULL || |
| 310 |
(mode[0] != 'r' && mode[0] != 'w') || |
| 311 |
mode[1] != 'b' || mode[2] != 0) { |
| 312 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
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return NULL; |
| 314 |
} |
| 315 |
|
| 316 |
s = g_malloc0(sizeof(QEMUFileStdio));
|
| 317 |
s->stdio_file = fdopen(fd, mode); |
| 318 |
if (!s->stdio_file)
|
| 319 |
goto fail;
|
| 320 |
|
| 321 |
if(mode[0] == 'r') { |
| 322 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
|
| 323 |
NULL, NULL, NULL); |
| 324 |
} else {
|
| 325 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
|
| 326 |
NULL, NULL, NULL); |
| 327 |
} |
| 328 |
return s->file;
|
| 329 |
|
| 330 |
fail:
|
| 331 |
g_free(s); |
| 332 |
return NULL; |
| 333 |
} |
| 334 |
|
| 335 |
QEMUFile *qemu_fopen_socket(int fd)
|
| 336 |
{
|
| 337 |
QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
|
| 338 |
|
| 339 |
s->fd = fd; |
| 340 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
|
| 341 |
NULL, NULL, NULL); |
| 342 |
return s->file;
|
| 343 |
} |
| 344 |
|
| 345 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
| 346 |
int64_t pos, int size)
|
| 347 |
{
|
| 348 |
QEMUFileStdio *s = opaque; |
| 349 |
fseek(s->stdio_file, pos, SEEK_SET); |
| 350 |
return fwrite(buf, 1, size, s->stdio_file); |
| 351 |
} |
| 352 |
|
| 353 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 354 |
{
|
| 355 |
QEMUFileStdio *s = opaque; |
| 356 |
fseek(s->stdio_file, pos, SEEK_SET); |
| 357 |
return fread(buf, 1, size, s->stdio_file); |
| 358 |
} |
| 359 |
|
| 360 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 361 |
{
|
| 362 |
QEMUFileStdio *s; |
| 363 |
|
| 364 |
if (mode == NULL || |
| 365 |
(mode[0] != 'r' && mode[0] != 'w') || |
| 366 |
mode[1] != 'b' || mode[2] != 0) { |
| 367 |
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
|
| 368 |
return NULL; |
| 369 |
} |
| 370 |
|
| 371 |
s = g_malloc0(sizeof(QEMUFileStdio));
|
| 372 |
|
| 373 |
s->stdio_file = fopen(filename, mode); |
| 374 |
if (!s->stdio_file)
|
| 375 |
goto fail;
|
| 376 |
|
| 377 |
if(mode[0] == 'w') { |
| 378 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
|
| 379 |
NULL, NULL, NULL); |
| 380 |
} else {
|
| 381 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
|
| 382 |
NULL, NULL, NULL); |
| 383 |
} |
| 384 |
return s->file;
|
| 385 |
fail:
|
| 386 |
g_free(s); |
| 387 |
return NULL; |
| 388 |
} |
| 389 |
|
| 390 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
| 391 |
int64_t pos, int size)
|
| 392 |
{
|
| 393 |
bdrv_save_vmstate(opaque, buf, pos, size); |
| 394 |
return size;
|
| 395 |
} |
| 396 |
|
| 397 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 398 |
{
|
| 399 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
| 400 |
} |
| 401 |
|
| 402 |
static int bdrv_fclose(void *opaque) |
| 403 |
{
|
| 404 |
return bdrv_flush(opaque);
|
| 405 |
} |
| 406 |
|
| 407 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
| 408 |
{
|
| 409 |
if (is_writable)
|
| 410 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
| 411 |
NULL, NULL, NULL); |
| 412 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
| 413 |
} |
| 414 |
|
| 415 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
| 416 |
QEMUFileGetBufferFunc *get_buffer, |
| 417 |
QEMUFileCloseFunc *close, |
| 418 |
QEMUFileRateLimit *rate_limit, |
| 419 |
QEMUFileSetRateLimit *set_rate_limit, |
| 420 |
QEMUFileGetRateLimit *get_rate_limit) |
| 421 |
{
|
| 422 |
QEMUFile *f; |
| 423 |
|
| 424 |
f = g_malloc0(sizeof(QEMUFile));
|
| 425 |
|
| 426 |
f->opaque = opaque; |
| 427 |
f->put_buffer = put_buffer; |
| 428 |
f->get_buffer = get_buffer; |
| 429 |
f->close = close; |
| 430 |
f->rate_limit = rate_limit; |
| 431 |
f->set_rate_limit = set_rate_limit; |
| 432 |
f->get_rate_limit = get_rate_limit; |
| 433 |
f->is_write = 0;
|
| 434 |
|
| 435 |
return f;
|
| 436 |
} |
| 437 |
|
| 438 |
int qemu_file_get_error(QEMUFile *f)
|
| 439 |
{
|
| 440 |
return f->last_error;
|
| 441 |
} |
| 442 |
|
| 443 |
void qemu_file_set_error(QEMUFile *f, int ret) |
| 444 |
{
|
| 445 |
f->last_error = ret; |
| 446 |
} |
| 447 |
|
| 448 |
/** Sets last_error conditionally
|
| 449 |
*
|
| 450 |
* Sets last_error only if ret is negative _and_ no error
|
| 451 |
* was set before.
|
| 452 |
*/
|
| 453 |
static void qemu_file_set_if_error(QEMUFile *f, int ret) |
| 454 |
{
|
| 455 |
if (ret < 0 && !f->last_error) { |
| 456 |
qemu_file_set_error(f, ret); |
| 457 |
} |
| 458 |
} |
| 459 |
|
| 460 |
/** Flushes QEMUFile buffer
|
| 461 |
*
|
| 462 |
*/
|
| 463 |
static int qemu_fflush(QEMUFile *f) |
| 464 |
{
|
| 465 |
int ret = 0; |
| 466 |
|
| 467 |
if (!f->put_buffer)
|
| 468 |
return 0; |
| 469 |
|
| 470 |
if (f->is_write && f->buf_index > 0) { |
| 471 |
ret = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 472 |
if (ret >= 0) { |
| 473 |
f->buf_offset += f->buf_index; |
| 474 |
} |
| 475 |
f->buf_index = 0;
|
| 476 |
} |
| 477 |
return ret;
|
| 478 |
} |
| 479 |
|
| 480 |
static void qemu_fill_buffer(QEMUFile *f) |
| 481 |
{
|
| 482 |
int len;
|
| 483 |
int pending;
|
| 484 |
|
| 485 |
if (!f->get_buffer)
|
| 486 |
return;
|
| 487 |
|
| 488 |
if (f->is_write)
|
| 489 |
abort(); |
| 490 |
|
| 491 |
pending = f->buf_size - f->buf_index; |
| 492 |
if (pending > 0) { |
| 493 |
memmove(f->buf, f->buf + f->buf_index, pending); |
| 494 |
} |
| 495 |
f->buf_index = 0;
|
| 496 |
f->buf_size = pending; |
| 497 |
|
| 498 |
len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
| 499 |
IO_BUF_SIZE - pending); |
| 500 |
if (len > 0) { |
| 501 |
f->buf_size += len; |
| 502 |
f->buf_offset += len; |
| 503 |
} else if (len == 0) { |
| 504 |
f->last_error = -EIO; |
| 505 |
} else if (len != -EAGAIN) |
| 506 |
qemu_file_set_error(f, len); |
| 507 |
} |
| 508 |
|
| 509 |
/** Closes the file
|
| 510 |
*
|
| 511 |
* Returns negative error value if any error happened on previous operations or
|
| 512 |
* while closing the file. Returns 0 or positive number on success.
|
| 513 |
*
|
| 514 |
* The meaning of return value on success depends on the specific backend
|
| 515 |
* being used.
|
| 516 |
*/
|
| 517 |
int qemu_fclose(QEMUFile *f)
|
| 518 |
{
|
| 519 |
int ret;
|
| 520 |
ret = qemu_fflush(f); |
| 521 |
|
| 522 |
if (f->close) {
|
| 523 |
int ret2 = f->close(f->opaque);
|
| 524 |
if (ret >= 0) { |
| 525 |
ret = ret2; |
| 526 |
} |
| 527 |
} |
| 528 |
/* If any error was spotted before closing, we should report it
|
| 529 |
* instead of the close() return value.
|
| 530 |
*/
|
| 531 |
if (f->last_error) {
|
| 532 |
ret = f->last_error; |
| 533 |
} |
| 534 |
g_free(f); |
| 535 |
return ret;
|
| 536 |
} |
| 537 |
|
| 538 |
void qemu_file_put_notify(QEMUFile *f)
|
| 539 |
{
|
| 540 |
f->put_buffer(f->opaque, NULL, 0, 0); |
| 541 |
} |
| 542 |
|
| 543 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 544 |
{
|
| 545 |
int l;
|
| 546 |
|
| 547 |
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
| 548 |
fprintf(stderr, |
| 549 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 550 |
abort(); |
| 551 |
} |
| 552 |
|
| 553 |
while (!f->last_error && size > 0) { |
| 554 |
l = IO_BUF_SIZE - f->buf_index; |
| 555 |
if (l > size)
|
| 556 |
l = size; |
| 557 |
memcpy(f->buf + f->buf_index, buf, l); |
| 558 |
f->is_write = 1;
|
| 559 |
f->buf_index += l; |
| 560 |
buf += l; |
| 561 |
size -= l; |
| 562 |
if (f->buf_index >= IO_BUF_SIZE) {
|
| 563 |
int ret = qemu_fflush(f);
|
| 564 |
qemu_file_set_if_error(f, ret); |
| 565 |
} |
| 566 |
} |
| 567 |
} |
| 568 |
|
| 569 |
void qemu_put_byte(QEMUFile *f, int v) |
| 570 |
{
|
| 571 |
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
| 572 |
fprintf(stderr, |
| 573 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 574 |
abort(); |
| 575 |
} |
| 576 |
|
| 577 |
f->buf[f->buf_index++] = v; |
| 578 |
f->is_write = 1;
|
| 579 |
if (f->buf_index >= IO_BUF_SIZE) {
|
| 580 |
int ret = qemu_fflush(f);
|
| 581 |
qemu_file_set_if_error(f, ret); |
| 582 |
} |
| 583 |
} |
| 584 |
|
| 585 |
static void qemu_file_skip(QEMUFile *f, int size) |
| 586 |
{
|
| 587 |
if (f->buf_index + size <= f->buf_size) {
|
| 588 |
f->buf_index += size; |
| 589 |
} |
| 590 |
} |
| 591 |
|
| 592 |
static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) |
| 593 |
{
|
| 594 |
int pending;
|
| 595 |
int index;
|
| 596 |
|
| 597 |
if (f->is_write) {
|
| 598 |
abort(); |
| 599 |
} |
| 600 |
|
| 601 |
index = f->buf_index + offset; |
| 602 |
pending = f->buf_size - index; |
| 603 |
if (pending < size) {
|
| 604 |
qemu_fill_buffer(f); |
| 605 |
index = f->buf_index + offset; |
| 606 |
pending = f->buf_size - index; |
| 607 |
} |
| 608 |
|
| 609 |
if (pending <= 0) { |
| 610 |
return 0; |
| 611 |
} |
| 612 |
if (size > pending) {
|
| 613 |
size = pending; |
| 614 |
} |
| 615 |
|
| 616 |
memcpy(buf, f->buf + index, size); |
| 617 |
return size;
|
| 618 |
} |
| 619 |
|
| 620 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) |
| 621 |
{
|
| 622 |
int pending = size;
|
| 623 |
int done = 0; |
| 624 |
|
| 625 |
while (pending > 0) { |
| 626 |
int res;
|
| 627 |
|
| 628 |
res = qemu_peek_buffer(f, buf, pending, 0);
|
| 629 |
if (res == 0) { |
| 630 |
return done;
|
| 631 |
} |
| 632 |
qemu_file_skip(f, res); |
| 633 |
buf += res; |
| 634 |
pending -= res; |
| 635 |
done += res; |
| 636 |
} |
| 637 |
return done;
|
| 638 |
} |
| 639 |
|
| 640 |
static int qemu_peek_byte(QEMUFile *f, int offset) |
| 641 |
{
|
| 642 |
int index = f->buf_index + offset;
|
| 643 |
|
| 644 |
if (f->is_write) {
|
| 645 |
abort(); |
| 646 |
} |
| 647 |
|
| 648 |
if (index >= f->buf_size) {
|
| 649 |
qemu_fill_buffer(f); |
| 650 |
index = f->buf_index + offset; |
| 651 |
if (index >= f->buf_size) {
|
| 652 |
return 0; |
| 653 |
} |
| 654 |
} |
| 655 |
return f->buf[index];
|
| 656 |
} |
| 657 |
|
| 658 |
int qemu_get_byte(QEMUFile *f)
|
| 659 |
{
|
| 660 |
int result;
|
| 661 |
|
| 662 |
result = qemu_peek_byte(f, 0);
|
| 663 |
qemu_file_skip(f, 1);
|
| 664 |
return result;
|
| 665 |
} |
| 666 |
|
| 667 |
int64_t qemu_ftell(QEMUFile *f) |
| 668 |
{
|
| 669 |
return f->buf_offset - f->buf_size + f->buf_index;
|
| 670 |
} |
| 671 |
|
| 672 |
int qemu_file_rate_limit(QEMUFile *f)
|
| 673 |
{
|
| 674 |
if (f->rate_limit)
|
| 675 |
return f->rate_limit(f->opaque);
|
| 676 |
|
| 677 |
return 0; |
| 678 |
} |
| 679 |
|
| 680 |
int64_t qemu_file_get_rate_limit(QEMUFile *f) |
| 681 |
{
|
| 682 |
if (f->get_rate_limit)
|
| 683 |
return f->get_rate_limit(f->opaque);
|
| 684 |
|
| 685 |
return 0; |
| 686 |
} |
| 687 |
|
| 688 |
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
| 689 |
{
|
| 690 |
/* any failed or completed migration keeps its state to allow probing of
|
| 691 |
* migration data, but has no associated file anymore */
|
| 692 |
if (f && f->set_rate_limit)
|
| 693 |
return f->set_rate_limit(f->opaque, new_rate);
|
| 694 |
|
| 695 |
return 0; |
| 696 |
} |
| 697 |
|
| 698 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 699 |
{
|
| 700 |
qemu_put_byte(f, v >> 8);
|
| 701 |
qemu_put_byte(f, v); |
| 702 |
} |
| 703 |
|
| 704 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 705 |
{
|
| 706 |
qemu_put_byte(f, v >> 24);
|
| 707 |
qemu_put_byte(f, v >> 16);
|
| 708 |
qemu_put_byte(f, v >> 8);
|
| 709 |
qemu_put_byte(f, v); |
| 710 |
} |
| 711 |
|
| 712 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
| 713 |
{
|
| 714 |
qemu_put_be32(f, v >> 32);
|
| 715 |
qemu_put_be32(f, v); |
| 716 |
} |
| 717 |
|
| 718 |
unsigned int qemu_get_be16(QEMUFile *f) |
| 719 |
{
|
| 720 |
unsigned int v; |
| 721 |
v = qemu_get_byte(f) << 8;
|
| 722 |
v |= qemu_get_byte(f); |
| 723 |
return v;
|
| 724 |
} |
| 725 |
|
| 726 |
unsigned int qemu_get_be32(QEMUFile *f) |
| 727 |
{
|
| 728 |
unsigned int v; |
| 729 |
v = qemu_get_byte(f) << 24;
|
| 730 |
v |= qemu_get_byte(f) << 16;
|
| 731 |
v |= qemu_get_byte(f) << 8;
|
| 732 |
v |= qemu_get_byte(f); |
| 733 |
return v;
|
| 734 |
} |
| 735 |
|
| 736 |
uint64_t qemu_get_be64(QEMUFile *f) |
| 737 |
{
|
| 738 |
uint64_t v; |
| 739 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
| 740 |
v |= qemu_get_be32(f); |
| 741 |
return v;
|
| 742 |
} |
| 743 |
|
| 744 |
|
| 745 |
/* timer */
|
| 746 |
|
| 747 |
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
| 748 |
{
|
| 749 |
uint64_t expire_time; |
| 750 |
|
| 751 |
expire_time = qemu_timer_expire_time_ns(ts); |
| 752 |
qemu_put_be64(f, expire_time); |
| 753 |
} |
| 754 |
|
| 755 |
void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
| 756 |
{
|
| 757 |
uint64_t expire_time; |
| 758 |
|
| 759 |
expire_time = qemu_get_be64(f); |
| 760 |
if (expire_time != -1) { |
| 761 |
qemu_mod_timer_ns(ts, expire_time); |
| 762 |
} else {
|
| 763 |
qemu_del_timer(ts); |
| 764 |
} |
| 765 |
} |
| 766 |
|
| 767 |
|
| 768 |
/* bool */
|
| 769 |
|
| 770 |
static int get_bool(QEMUFile *f, void *pv, size_t size) |
| 771 |
{
|
| 772 |
bool *v = pv;
|
| 773 |
*v = qemu_get_byte(f); |
| 774 |
return 0; |
| 775 |
} |
| 776 |
|
| 777 |
static void put_bool(QEMUFile *f, void *pv, size_t size) |
| 778 |
{
|
| 779 |
bool *v = pv;
|
| 780 |
qemu_put_byte(f, *v); |
| 781 |
} |
| 782 |
|
| 783 |
const VMStateInfo vmstate_info_bool = {
|
| 784 |
.name = "bool",
|
| 785 |
.get = get_bool, |
| 786 |
.put = put_bool, |
| 787 |
}; |
| 788 |
|
| 789 |
/* 8 bit int */
|
| 790 |
|
| 791 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
| 792 |
{
|
| 793 |
int8_t *v = pv; |
| 794 |
qemu_get_s8s(f, v); |
| 795 |
return 0; |
| 796 |
} |
| 797 |
|
| 798 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
| 799 |
{
|
| 800 |
int8_t *v = pv; |
| 801 |
qemu_put_s8s(f, v); |
| 802 |
} |
| 803 |
|
| 804 |
const VMStateInfo vmstate_info_int8 = {
|
| 805 |
.name = "int8",
|
| 806 |
.get = get_int8, |
| 807 |
.put = put_int8, |
| 808 |
}; |
| 809 |
|
| 810 |
/* 16 bit int */
|
| 811 |
|
| 812 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
| 813 |
{
|
| 814 |
int16_t *v = pv; |
| 815 |
qemu_get_sbe16s(f, v); |
| 816 |
return 0; |
| 817 |
} |
| 818 |
|
| 819 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
| 820 |
{
|
| 821 |
int16_t *v = pv; |
| 822 |
qemu_put_sbe16s(f, v); |
| 823 |
} |
| 824 |
|
| 825 |
const VMStateInfo vmstate_info_int16 = {
|
| 826 |
.name = "int16",
|
| 827 |
.get = get_int16, |
| 828 |
.put = put_int16, |
| 829 |
}; |
| 830 |
|
| 831 |
/* 32 bit int */
|
| 832 |
|
| 833 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
| 834 |
{
|
| 835 |
int32_t *v = pv; |
| 836 |
qemu_get_sbe32s(f, v); |
| 837 |
return 0; |
| 838 |
} |
| 839 |
|
| 840 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
| 841 |
{
|
| 842 |
int32_t *v = pv; |
| 843 |
qemu_put_sbe32s(f, v); |
| 844 |
} |
| 845 |
|
| 846 |
const VMStateInfo vmstate_info_int32 = {
|
| 847 |
.name = "int32",
|
| 848 |
.get = get_int32, |
| 849 |
.put = put_int32, |
| 850 |
}; |
| 851 |
|
| 852 |
/* 32 bit int. See that the received value is the same than the one
|
| 853 |
in the field */
|
| 854 |
|
| 855 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
| 856 |
{
|
| 857 |
int32_t *v = pv; |
| 858 |
int32_t v2; |
| 859 |
qemu_get_sbe32s(f, &v2); |
| 860 |
|
| 861 |
if (*v == v2)
|
| 862 |
return 0; |
| 863 |
return -EINVAL;
|
| 864 |
} |
| 865 |
|
| 866 |
const VMStateInfo vmstate_info_int32_equal = {
|
| 867 |
.name = "int32 equal",
|
| 868 |
.get = get_int32_equal, |
| 869 |
.put = put_int32, |
| 870 |
}; |
| 871 |
|
| 872 |
/* 32 bit int. See that the received value is the less or the same
|
| 873 |
than the one in the field */
|
| 874 |
|
| 875 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
| 876 |
{
|
| 877 |
int32_t *old = pv; |
| 878 |
int32_t new; |
| 879 |
qemu_get_sbe32s(f, &new); |
| 880 |
|
| 881 |
if (*old <= new)
|
| 882 |
return 0; |
| 883 |
return -EINVAL;
|
| 884 |
} |
| 885 |
|
| 886 |
const VMStateInfo vmstate_info_int32_le = {
|
| 887 |
.name = "int32 equal",
|
| 888 |
.get = get_int32_le, |
| 889 |
.put = put_int32, |
| 890 |
}; |
| 891 |
|
| 892 |
/* 64 bit int */
|
| 893 |
|
| 894 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
| 895 |
{
|
| 896 |
int64_t *v = pv; |
| 897 |
qemu_get_sbe64s(f, v); |
| 898 |
return 0; |
| 899 |
} |
| 900 |
|
| 901 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
| 902 |
{
|
| 903 |
int64_t *v = pv; |
| 904 |
qemu_put_sbe64s(f, v); |
| 905 |
} |
| 906 |
|
| 907 |
const VMStateInfo vmstate_info_int64 = {
|
| 908 |
.name = "int64",
|
| 909 |
.get = get_int64, |
| 910 |
.put = put_int64, |
| 911 |
}; |
| 912 |
|
| 913 |
/* 8 bit unsigned int */
|
| 914 |
|
| 915 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
| 916 |
{
|
| 917 |
uint8_t *v = pv; |
| 918 |
qemu_get_8s(f, v); |
| 919 |
return 0; |
| 920 |
} |
| 921 |
|
| 922 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
| 923 |
{
|
| 924 |
uint8_t *v = pv; |
| 925 |
qemu_put_8s(f, v); |
| 926 |
} |
| 927 |
|
| 928 |
const VMStateInfo vmstate_info_uint8 = {
|
| 929 |
.name = "uint8",
|
| 930 |
.get = get_uint8, |
| 931 |
.put = put_uint8, |
| 932 |
}; |
| 933 |
|
| 934 |
/* 16 bit unsigned int */
|
| 935 |
|
| 936 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
| 937 |
{
|
| 938 |
uint16_t *v = pv; |
| 939 |
qemu_get_be16s(f, v); |
| 940 |
return 0; |
| 941 |
} |
| 942 |
|
| 943 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
| 944 |
{
|
| 945 |
uint16_t *v = pv; |
| 946 |
qemu_put_be16s(f, v); |
| 947 |
} |
| 948 |
|
| 949 |
const VMStateInfo vmstate_info_uint16 = {
|
| 950 |
.name = "uint16",
|
| 951 |
.get = get_uint16, |
| 952 |
.put = put_uint16, |
| 953 |
}; |
| 954 |
|
| 955 |
/* 32 bit unsigned int */
|
| 956 |
|
| 957 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
| 958 |
{
|
| 959 |
uint32_t *v = pv; |
| 960 |
qemu_get_be32s(f, v); |
| 961 |
return 0; |
| 962 |
} |
| 963 |
|
| 964 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
| 965 |
{
|
| 966 |
uint32_t *v = pv; |
| 967 |
qemu_put_be32s(f, v); |
| 968 |
} |
| 969 |
|
| 970 |
const VMStateInfo vmstate_info_uint32 = {
|
| 971 |
.name = "uint32",
|
| 972 |
.get = get_uint32, |
| 973 |
.put = put_uint32, |
| 974 |
}; |
| 975 |
|
| 976 |
/* 32 bit uint. See that the received value is the same than the one
|
| 977 |
in the field */
|
| 978 |
|
| 979 |
static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
| 980 |
{
|
| 981 |
uint32_t *v = pv; |
| 982 |
uint32_t v2; |
| 983 |
qemu_get_be32s(f, &v2); |
| 984 |
|
| 985 |
if (*v == v2) {
|
| 986 |
return 0; |
| 987 |
} |
| 988 |
return -EINVAL;
|
| 989 |
} |
| 990 |
|
| 991 |
const VMStateInfo vmstate_info_uint32_equal = {
|
| 992 |
.name = "uint32 equal",
|
| 993 |
.get = get_uint32_equal, |
| 994 |
.put = put_uint32, |
| 995 |
}; |
| 996 |
|
| 997 |
/* 64 bit unsigned int */
|
| 998 |
|
| 999 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
| 1000 |
{
|
| 1001 |
uint64_t *v = pv; |
| 1002 |
qemu_get_be64s(f, v); |
| 1003 |
return 0; |
| 1004 |
} |
| 1005 |
|
| 1006 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
| 1007 |
{
|
| 1008 |
uint64_t *v = pv; |
| 1009 |
qemu_put_be64s(f, v); |
| 1010 |
} |
| 1011 |
|
| 1012 |
const VMStateInfo vmstate_info_uint64 = {
|
| 1013 |
.name = "uint64",
|
| 1014 |
.get = get_uint64, |
| 1015 |
.put = put_uint64, |
| 1016 |
}; |
| 1017 |
|
| 1018 |
/* 8 bit int. See that the received value is the same than the one
|
| 1019 |
in the field */
|
| 1020 |
|
| 1021 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
| 1022 |
{
|
| 1023 |
uint8_t *v = pv; |
| 1024 |
uint8_t v2; |
| 1025 |
qemu_get_8s(f, &v2); |
| 1026 |
|
| 1027 |
if (*v == v2)
|
| 1028 |
return 0; |
| 1029 |
return -EINVAL;
|
| 1030 |
} |
| 1031 |
|
| 1032 |
const VMStateInfo vmstate_info_uint8_equal = {
|
| 1033 |
.name = "uint8 equal",
|
| 1034 |
.get = get_uint8_equal, |
| 1035 |
.put = put_uint8, |
| 1036 |
}; |
| 1037 |
|
| 1038 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
| 1039 |
in the field */
|
| 1040 |
|
| 1041 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
| 1042 |
{
|
| 1043 |
uint16_t *v = pv; |
| 1044 |
uint16_t v2; |
| 1045 |
qemu_get_be16s(f, &v2); |
| 1046 |
|
| 1047 |
if (*v == v2)
|
| 1048 |
return 0; |
| 1049 |
return -EINVAL;
|
| 1050 |
} |
| 1051 |
|
| 1052 |
const VMStateInfo vmstate_info_uint16_equal = {
|
| 1053 |
.name = "uint16 equal",
|
| 1054 |
.get = get_uint16_equal, |
| 1055 |
.put = put_uint16, |
| 1056 |
}; |
| 1057 |
|
| 1058 |
/* timers */
|
| 1059 |
|
| 1060 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
| 1061 |
{
|
| 1062 |
QEMUTimer *v = pv; |
| 1063 |
qemu_get_timer(f, v); |
| 1064 |
return 0; |
| 1065 |
} |
| 1066 |
|
| 1067 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
| 1068 |
{
|
| 1069 |
QEMUTimer *v = pv; |
| 1070 |
qemu_put_timer(f, v); |
| 1071 |
} |
| 1072 |
|
| 1073 |
const VMStateInfo vmstate_info_timer = {
|
| 1074 |
.name = "timer",
|
| 1075 |
.get = get_timer, |
| 1076 |
.put = put_timer, |
| 1077 |
}; |
| 1078 |
|
| 1079 |
/* uint8_t buffers */
|
| 1080 |
|
| 1081 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
| 1082 |
{
|
| 1083 |
uint8_t *v = pv; |
| 1084 |
qemu_get_buffer(f, v, size); |
| 1085 |
return 0; |
| 1086 |
} |
| 1087 |
|
| 1088 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
| 1089 |
{
|
| 1090 |
uint8_t *v = pv; |
| 1091 |
qemu_put_buffer(f, v, size); |
| 1092 |
} |
| 1093 |
|
| 1094 |
const VMStateInfo vmstate_info_buffer = {
|
| 1095 |
.name = "buffer",
|
| 1096 |
.get = get_buffer, |
| 1097 |
.put = put_buffer, |
| 1098 |
}; |
| 1099 |
|
| 1100 |
/* unused buffers: space that was used for some fields that are
|
| 1101 |
not useful anymore */
|
| 1102 |
|
| 1103 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 1104 |
{
|
| 1105 |
uint8_t buf[1024];
|
| 1106 |
int block_len;
|
| 1107 |
|
| 1108 |
while (size > 0) { |
| 1109 |
block_len = MIN(sizeof(buf), size);
|
| 1110 |
size -= block_len; |
| 1111 |
qemu_get_buffer(f, buf, block_len); |
| 1112 |
} |
| 1113 |
return 0; |
| 1114 |
} |
| 1115 |
|
| 1116 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 1117 |
{
|
| 1118 |
static const uint8_t buf[1024]; |
| 1119 |
int block_len;
|
| 1120 |
|
| 1121 |
while (size > 0) { |
| 1122 |
block_len = MIN(sizeof(buf), size);
|
| 1123 |
size -= block_len; |
| 1124 |
qemu_put_buffer(f, buf, block_len); |
| 1125 |
} |
| 1126 |
} |
| 1127 |
|
| 1128 |
const VMStateInfo vmstate_info_unused_buffer = {
|
| 1129 |
.name = "unused_buffer",
|
| 1130 |
.get = get_unused_buffer, |
| 1131 |
.put = put_unused_buffer, |
| 1132 |
}; |
| 1133 |
|
| 1134 |
typedef struct CompatEntry { |
| 1135 |
char idstr[256]; |
| 1136 |
int instance_id;
|
| 1137 |
} CompatEntry; |
| 1138 |
|
| 1139 |
typedef struct SaveStateEntry { |
| 1140 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
| 1141 |
char idstr[256]; |
| 1142 |
int instance_id;
|
| 1143 |
int alias_id;
|
| 1144 |
int version_id;
|
| 1145 |
int section_id;
|
| 1146 |
SaveVMHandlers *ops; |
| 1147 |
const VMStateDescription *vmsd;
|
| 1148 |
void *opaque;
|
| 1149 |
CompatEntry *compat; |
| 1150 |
int no_migrate;
|
| 1151 |
int is_ram;
|
| 1152 |
} SaveStateEntry; |
| 1153 |
|
| 1154 |
|
| 1155 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
| 1156 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
| 1157 |
static int global_section_id; |
| 1158 |
|
| 1159 |
static int calculate_new_instance_id(const char *idstr) |
| 1160 |
{
|
| 1161 |
SaveStateEntry *se; |
| 1162 |
int instance_id = 0; |
| 1163 |
|
| 1164 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1165 |
if (strcmp(idstr, se->idstr) == 0 |
| 1166 |
&& instance_id <= se->instance_id) {
|
| 1167 |
instance_id = se->instance_id + 1;
|
| 1168 |
} |
| 1169 |
} |
| 1170 |
return instance_id;
|
| 1171 |
} |
| 1172 |
|
| 1173 |
static int calculate_compat_instance_id(const char *idstr) |
| 1174 |
{
|
| 1175 |
SaveStateEntry *se; |
| 1176 |
int instance_id = 0; |
| 1177 |
|
| 1178 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1179 |
if (!se->compat)
|
| 1180 |
continue;
|
| 1181 |
|
| 1182 |
if (strcmp(idstr, se->compat->idstr) == 0 |
| 1183 |
&& instance_id <= se->compat->instance_id) {
|
| 1184 |
instance_id = se->compat->instance_id + 1;
|
| 1185 |
} |
| 1186 |
} |
| 1187 |
return instance_id;
|
| 1188 |
} |
| 1189 |
|
| 1190 |
/* TODO: Individual devices generally have very little idea about the rest
|
| 1191 |
of the system, so instance_id should be removed/replaced.
|
| 1192 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
| 1193 |
distinguishing id for all instances of your device class. */
|
| 1194 |
int register_savevm_live(DeviceState *dev,
|
| 1195 |
const char *idstr, |
| 1196 |
int instance_id,
|
| 1197 |
int version_id,
|
| 1198 |
SaveVMHandlers *ops, |
| 1199 |
void *opaque)
|
| 1200 |
{
|
| 1201 |
SaveStateEntry *se; |
| 1202 |
|
| 1203 |
se = g_malloc0(sizeof(SaveStateEntry));
|
| 1204 |
se->version_id = version_id; |
| 1205 |
se->section_id = global_section_id++; |
| 1206 |
se->ops = ops; |
| 1207 |
se->opaque = opaque; |
| 1208 |
se->vmsd = NULL;
|
| 1209 |
se->no_migrate = 0;
|
| 1210 |
/* if this is a live_savem then set is_ram */
|
| 1211 |
if (ops->save_live_setup != NULL) { |
| 1212 |
se->is_ram = 1;
|
| 1213 |
} |
| 1214 |
|
| 1215 |
if (dev) {
|
| 1216 |
char *id = qdev_get_dev_path(dev);
|
| 1217 |
if (id) {
|
| 1218 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
| 1219 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
| 1220 |
g_free(id); |
| 1221 |
|
| 1222 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
| 1223 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
| 1224 |
se->compat->instance_id = instance_id == -1 ?
|
| 1225 |
calculate_compat_instance_id(idstr) : instance_id; |
| 1226 |
instance_id = -1;
|
| 1227 |
} |
| 1228 |
} |
| 1229 |
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
| 1230 |
|
| 1231 |
if (instance_id == -1) { |
| 1232 |
se->instance_id = calculate_new_instance_id(se->idstr); |
| 1233 |
} else {
|
| 1234 |
se->instance_id = instance_id; |
| 1235 |
} |
| 1236 |
assert(!se->compat || se->instance_id == 0);
|
| 1237 |
/* add at the end of list */
|
| 1238 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| 1239 |
return 0; |
| 1240 |
} |
| 1241 |
|
| 1242 |
int register_savevm(DeviceState *dev,
|
| 1243 |
const char *idstr, |
| 1244 |
int instance_id,
|
| 1245 |
int version_id,
|
| 1246 |
SaveStateHandler *save_state, |
| 1247 |
LoadStateHandler *load_state, |
| 1248 |
void *opaque)
|
| 1249 |
{
|
| 1250 |
SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
|
| 1251 |
ops->save_state = save_state; |
| 1252 |
ops->load_state = load_state; |
| 1253 |
return register_savevm_live(dev, idstr, instance_id, version_id,
|
| 1254 |
ops, opaque); |
| 1255 |
} |
| 1256 |
|
| 1257 |
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
| 1258 |
{
|
| 1259 |
SaveStateEntry *se, *new_se; |
| 1260 |
char id[256] = ""; |
| 1261 |
|
| 1262 |
if (dev) {
|
| 1263 |
char *path = qdev_get_dev_path(dev);
|
| 1264 |
if (path) {
|
| 1265 |
pstrcpy(id, sizeof(id), path);
|
| 1266 |
pstrcat(id, sizeof(id), "/"); |
| 1267 |
g_free(path); |
| 1268 |
} |
| 1269 |
} |
| 1270 |
pstrcat(id, sizeof(id), idstr);
|
| 1271 |
|
| 1272 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
| 1273 |
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
| 1274 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| 1275 |
if (se->compat) {
|
| 1276 |
g_free(se->compat); |
| 1277 |
} |
| 1278 |
g_free(se->ops); |
| 1279 |
g_free(se); |
| 1280 |
} |
| 1281 |
} |
| 1282 |
} |
| 1283 |
|
| 1284 |
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
| 1285 |
const VMStateDescription *vmsd,
|
| 1286 |
void *opaque, int alias_id, |
| 1287 |
int required_for_version)
|
| 1288 |
{
|
| 1289 |
SaveStateEntry *se; |
| 1290 |
|
| 1291 |
/* If this triggers, alias support can be dropped for the vmsd. */
|
| 1292 |
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
| 1293 |
|
| 1294 |
se = g_malloc0(sizeof(SaveStateEntry));
|
| 1295 |
se->version_id = vmsd->version_id; |
| 1296 |
se->section_id = global_section_id++; |
| 1297 |
se->opaque = opaque; |
| 1298 |
se->vmsd = vmsd; |
| 1299 |
se->alias_id = alias_id; |
| 1300 |
se->no_migrate = vmsd->unmigratable; |
| 1301 |
|
| 1302 |
if (dev) {
|
| 1303 |
char *id = qdev_get_dev_path(dev);
|
| 1304 |
if (id) {
|
| 1305 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
| 1306 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
| 1307 |
g_free(id); |
| 1308 |
|
| 1309 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
| 1310 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
| 1311 |
se->compat->instance_id = instance_id == -1 ?
|
| 1312 |
calculate_compat_instance_id(vmsd->name) : instance_id; |
| 1313 |
instance_id = -1;
|
| 1314 |
} |
| 1315 |
} |
| 1316 |
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
| 1317 |
|
| 1318 |
if (instance_id == -1) { |
| 1319 |
se->instance_id = calculate_new_instance_id(se->idstr); |
| 1320 |
} else {
|
| 1321 |
se->instance_id = instance_id; |
| 1322 |
} |
| 1323 |
assert(!se->compat || se->instance_id == 0);
|
| 1324 |
/* add at the end of list */
|
| 1325 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| 1326 |
return 0; |
| 1327 |
} |
| 1328 |
|
| 1329 |
int vmstate_register(DeviceState *dev, int instance_id, |
| 1330 |
const VMStateDescription *vmsd, void *opaque) |
| 1331 |
{
|
| 1332 |
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
|
| 1333 |
opaque, -1, 0); |
| 1334 |
} |
| 1335 |
|
| 1336 |
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
| 1337 |
void *opaque)
|
| 1338 |
{
|
| 1339 |
SaveStateEntry *se, *new_se; |
| 1340 |
|
| 1341 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
| 1342 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
| 1343 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| 1344 |
if (se->compat) {
|
| 1345 |
g_free(se->compat); |
| 1346 |
} |
| 1347 |
g_free(se); |
| 1348 |
} |
| 1349 |
} |
| 1350 |
} |
| 1351 |
|
| 1352 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| 1353 |
void *opaque);
|
| 1354 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| 1355 |
void *opaque);
|
| 1356 |
|
| 1357 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 1358 |
void *opaque, int version_id) |
| 1359 |
{
|
| 1360 |
VMStateField *field = vmsd->fields; |
| 1361 |
int ret;
|
| 1362 |
|
| 1363 |
if (version_id > vmsd->version_id) {
|
| 1364 |
return -EINVAL;
|
| 1365 |
} |
| 1366 |
if (version_id < vmsd->minimum_version_id_old) {
|
| 1367 |
return -EINVAL;
|
| 1368 |
} |
| 1369 |
if (version_id < vmsd->minimum_version_id) {
|
| 1370 |
return vmsd->load_state_old(f, opaque, version_id);
|
| 1371 |
} |
| 1372 |
if (vmsd->pre_load) {
|
| 1373 |
int ret = vmsd->pre_load(opaque);
|
| 1374 |
if (ret)
|
| 1375 |
return ret;
|
| 1376 |
} |
| 1377 |
while(field->name) {
|
| 1378 |
if ((field->field_exists &&
|
| 1379 |
field->field_exists(opaque, version_id)) || |
| 1380 |
(!field->field_exists && |
| 1381 |
field->version_id <= version_id)) {
|
| 1382 |
void *base_addr = opaque + field->offset;
|
| 1383 |
int i, n_elems = 1; |
| 1384 |
int size = field->size;
|
| 1385 |
|
| 1386 |
if (field->flags & VMS_VBUFFER) {
|
| 1387 |
size = *(int32_t *)(opaque+field->size_offset); |
| 1388 |
if (field->flags & VMS_MULTIPLY) {
|
| 1389 |
size *= field->size; |
| 1390 |
} |
| 1391 |
} |
| 1392 |
if (field->flags & VMS_ARRAY) {
|
| 1393 |
n_elems = field->num; |
| 1394 |
} else if (field->flags & VMS_VARRAY_INT32) { |
| 1395 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
| 1396 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
| 1397 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
| 1398 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
| 1399 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 1400 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
| 1401 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
| 1402 |
} |
| 1403 |
if (field->flags & VMS_POINTER) {
|
| 1404 |
base_addr = *(void **)base_addr + field->start;
|
| 1405 |
} |
| 1406 |
for (i = 0; i < n_elems; i++) { |
| 1407 |
void *addr = base_addr + size * i;
|
| 1408 |
|
| 1409 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
| 1410 |
addr = *(void **)addr;
|
| 1411 |
} |
| 1412 |
if (field->flags & VMS_STRUCT) {
|
| 1413 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
| 1414 |
} else {
|
| 1415 |
ret = field->info->get(f, addr, size); |
| 1416 |
|
| 1417 |
} |
| 1418 |
if (ret < 0) { |
| 1419 |
return ret;
|
| 1420 |
} |
| 1421 |
} |
| 1422 |
} |
| 1423 |
field++; |
| 1424 |
} |
| 1425 |
ret = vmstate_subsection_load(f, vmsd, opaque); |
| 1426 |
if (ret != 0) { |
| 1427 |
return ret;
|
| 1428 |
} |
| 1429 |
if (vmsd->post_load) {
|
| 1430 |
return vmsd->post_load(opaque, version_id);
|
| 1431 |
} |
| 1432 |
return 0; |
| 1433 |
} |
| 1434 |
|
| 1435 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 1436 |
void *opaque)
|
| 1437 |
{
|
| 1438 |
VMStateField *field = vmsd->fields; |
| 1439 |
|
| 1440 |
if (vmsd->pre_save) {
|
| 1441 |
vmsd->pre_save(opaque); |
| 1442 |
} |
| 1443 |
while(field->name) {
|
| 1444 |
if (!field->field_exists ||
|
| 1445 |
field->field_exists(opaque, vmsd->version_id)) {
|
| 1446 |
void *base_addr = opaque + field->offset;
|
| 1447 |
int i, n_elems = 1; |
| 1448 |
int size = field->size;
|
| 1449 |
|
| 1450 |
if (field->flags & VMS_VBUFFER) {
|
| 1451 |
size = *(int32_t *)(opaque+field->size_offset); |
| 1452 |
if (field->flags & VMS_MULTIPLY) {
|
| 1453 |
size *= field->size; |
| 1454 |
} |
| 1455 |
} |
| 1456 |
if (field->flags & VMS_ARRAY) {
|
| 1457 |
n_elems = field->num; |
| 1458 |
} else if (field->flags & VMS_VARRAY_INT32) { |
| 1459 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
| 1460 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
| 1461 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
| 1462 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
| 1463 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 1464 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
| 1465 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
| 1466 |
} |
| 1467 |
if (field->flags & VMS_POINTER) {
|
| 1468 |
base_addr = *(void **)base_addr + field->start;
|
| 1469 |
} |
| 1470 |
for (i = 0; i < n_elems; i++) { |
| 1471 |
void *addr = base_addr + size * i;
|
| 1472 |
|
| 1473 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
| 1474 |
addr = *(void **)addr;
|
| 1475 |
} |
| 1476 |
if (field->flags & VMS_STRUCT) {
|
| 1477 |
vmstate_save_state(f, field->vmsd, addr); |
| 1478 |
} else {
|
| 1479 |
field->info->put(f, addr, size); |
| 1480 |
} |
| 1481 |
} |
| 1482 |
} |
| 1483 |
field++; |
| 1484 |
} |
| 1485 |
vmstate_subsection_save(f, vmsd, opaque); |
| 1486 |
} |
| 1487 |
|
| 1488 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
| 1489 |
{
|
| 1490 |
if (!se->vmsd) { /* Old style */ |
| 1491 |
return se->ops->load_state(f, se->opaque, version_id);
|
| 1492 |
} |
| 1493 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
| 1494 |
} |
| 1495 |
|
| 1496 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
| 1497 |
{
|
| 1498 |
if (!se->vmsd) { /* Old style */ |
| 1499 |
se->ops->save_state(f, se->opaque); |
| 1500 |
return;
|
| 1501 |
} |
| 1502 |
vmstate_save_state(f,se->vmsd, se->opaque); |
| 1503 |
} |
| 1504 |
|
| 1505 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
| 1506 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 1507 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
| 1508 |
|
| 1509 |
#define QEMU_VM_EOF 0x00 |
| 1510 |
#define QEMU_VM_SECTION_START 0x01 |
| 1511 |
#define QEMU_VM_SECTION_PART 0x02 |
| 1512 |
#define QEMU_VM_SECTION_END 0x03 |
| 1513 |
#define QEMU_VM_SECTION_FULL 0x04 |
| 1514 |
#define QEMU_VM_SUBSECTION 0x05 |
| 1515 |
|
| 1516 |
bool qemu_savevm_state_blocked(Error **errp)
|
| 1517 |
{
|
| 1518 |
SaveStateEntry *se; |
| 1519 |
|
| 1520 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1521 |
if (se->no_migrate) {
|
| 1522 |
error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
| 1523 |
return true; |
| 1524 |
} |
| 1525 |
} |
| 1526 |
return false; |
| 1527 |
} |
| 1528 |
|
| 1529 |
int qemu_savevm_state_begin(QEMUFile *f,
|
| 1530 |
const MigrationParams *params)
|
| 1531 |
{
|
| 1532 |
SaveStateEntry *se; |
| 1533 |
int ret;
|
| 1534 |
|
| 1535 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1536 |
if (!se->ops || !se->ops->set_params) {
|
| 1537 |
continue;
|
| 1538 |
} |
| 1539 |
se->ops->set_params(params, se->opaque); |
| 1540 |
} |
| 1541 |
|
| 1542 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 1543 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 1544 |
|
| 1545 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1546 |
int len;
|
| 1547 |
|
| 1548 |
if (!se->ops || !se->ops->save_live_setup) {
|
| 1549 |
continue;
|
| 1550 |
} |
| 1551 |
if (se->ops && se->ops->is_active) {
|
| 1552 |
if (!se->ops->is_active(se->opaque)) {
|
| 1553 |
continue;
|
| 1554 |
} |
| 1555 |
} |
| 1556 |
/* Section type */
|
| 1557 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 1558 |
qemu_put_be32(f, se->section_id); |
| 1559 |
|
| 1560 |
/* ID string */
|
| 1561 |
len = strlen(se->idstr); |
| 1562 |
qemu_put_byte(f, len); |
| 1563 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 1564 |
|
| 1565 |
qemu_put_be32(f, se->instance_id); |
| 1566 |
qemu_put_be32(f, se->version_id); |
| 1567 |
|
| 1568 |
ret = se->ops->save_live_setup(f, se->opaque); |
| 1569 |
if (ret < 0) { |
| 1570 |
qemu_savevm_state_cancel(f); |
| 1571 |
return ret;
|
| 1572 |
} |
| 1573 |
} |
| 1574 |
ret = qemu_file_get_error(f); |
| 1575 |
if (ret != 0) { |
| 1576 |
qemu_savevm_state_cancel(f); |
| 1577 |
} |
| 1578 |
|
| 1579 |
return ret;
|
| 1580 |
|
| 1581 |
} |
| 1582 |
|
| 1583 |
/*
|
| 1584 |
* this function has three return values:
|
| 1585 |
* negative: there was one error, and we have -errno.
|
| 1586 |
* 0 : We haven't finished, caller have to go again
|
| 1587 |
* 1 : We have finished, we can go to complete phase
|
| 1588 |
*/
|
| 1589 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
| 1590 |
{
|
| 1591 |
SaveStateEntry *se; |
| 1592 |
int ret = 1; |
| 1593 |
|
| 1594 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1595 |
if (!se->ops || !se->ops->save_live_iterate) {
|
| 1596 |
continue;
|
| 1597 |
} |
| 1598 |
if (se->ops && se->ops->is_active) {
|
| 1599 |
if (!se->ops->is_active(se->opaque)) {
|
| 1600 |
continue;
|
| 1601 |
} |
| 1602 |
} |
| 1603 |
if (qemu_file_rate_limit(f)) {
|
| 1604 |
return 0; |
| 1605 |
} |
| 1606 |
trace_savevm_section_start(); |
| 1607 |
/* Section type */
|
| 1608 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 1609 |
qemu_put_be32(f, se->section_id); |
| 1610 |
|
| 1611 |
ret = se->ops->save_live_iterate(f, se->opaque); |
| 1612 |
trace_savevm_section_end(se->section_id); |
| 1613 |
|
| 1614 |
if (ret <= 0) { |
| 1615 |
/* Do not proceed to the next vmstate before this one reported
|
| 1616 |
completion of the current stage. This serializes the migration
|
| 1617 |
and reduces the probability that a faster changing state is
|
| 1618 |
synchronized over and over again. */
|
| 1619 |
break;
|
| 1620 |
} |
| 1621 |
} |
| 1622 |
if (ret != 0) { |
| 1623 |
return ret;
|
| 1624 |
} |
| 1625 |
ret = qemu_file_get_error(f); |
| 1626 |
if (ret != 0) { |
| 1627 |
qemu_savevm_state_cancel(f); |
| 1628 |
} |
| 1629 |
return ret;
|
| 1630 |
} |
| 1631 |
|
| 1632 |
int qemu_savevm_state_complete(QEMUFile *f)
|
| 1633 |
{
|
| 1634 |
SaveStateEntry *se; |
| 1635 |
int ret;
|
| 1636 |
|
| 1637 |
cpu_synchronize_all_states(); |
| 1638 |
|
| 1639 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1640 |
if (!se->ops || !se->ops->save_live_complete) {
|
| 1641 |
continue;
|
| 1642 |
} |
| 1643 |
if (se->ops && se->ops->is_active) {
|
| 1644 |
if (!se->ops->is_active(se->opaque)) {
|
| 1645 |
continue;
|
| 1646 |
} |
| 1647 |
} |
| 1648 |
trace_savevm_section_start(); |
| 1649 |
/* Section type */
|
| 1650 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 1651 |
qemu_put_be32(f, se->section_id); |
| 1652 |
|
| 1653 |
ret = se->ops->save_live_complete(f, se->opaque); |
| 1654 |
trace_savevm_section_end(se->section_id); |
| 1655 |
if (ret < 0) { |
| 1656 |
return ret;
|
| 1657 |
} |
| 1658 |
} |
| 1659 |
|
| 1660 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1661 |
int len;
|
| 1662 |
|
| 1663 |
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
| 1664 |
continue;
|
| 1665 |
} |
| 1666 |
trace_savevm_section_start(); |
| 1667 |
/* Section type */
|
| 1668 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 1669 |
qemu_put_be32(f, se->section_id); |
| 1670 |
|
| 1671 |
/* ID string */
|
| 1672 |
len = strlen(se->idstr); |
| 1673 |
qemu_put_byte(f, len); |
| 1674 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 1675 |
|
| 1676 |
qemu_put_be32(f, se->instance_id); |
| 1677 |
qemu_put_be32(f, se->version_id); |
| 1678 |
|
| 1679 |
vmstate_save(f, se); |
| 1680 |
trace_savevm_section_end(se->section_id); |
| 1681 |
} |
| 1682 |
|
| 1683 |
qemu_put_byte(f, QEMU_VM_EOF); |
| 1684 |
|
| 1685 |
return qemu_file_get_error(f);
|
| 1686 |
} |
| 1687 |
|
| 1688 |
void qemu_savevm_state_cancel(QEMUFile *f)
|
| 1689 |
{
|
| 1690 |
SaveStateEntry *se; |
| 1691 |
|
| 1692 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1693 |
if (se->ops && se->ops->cancel) {
|
| 1694 |
se->ops->cancel(se->opaque); |
| 1695 |
} |
| 1696 |
} |
| 1697 |
} |
| 1698 |
|
| 1699 |
static int qemu_savevm_state(QEMUFile *f) |
| 1700 |
{
|
| 1701 |
int ret;
|
| 1702 |
MigrationParams params = {
|
| 1703 |
.blk = 0,
|
| 1704 |
.shared = 0
|
| 1705 |
}; |
| 1706 |
|
| 1707 |
if (qemu_savevm_state_blocked(NULL)) { |
| 1708 |
ret = -EINVAL; |
| 1709 |
goto out;
|
| 1710 |
} |
| 1711 |
|
| 1712 |
ret = qemu_savevm_state_begin(f, ¶ms); |
| 1713 |
if (ret < 0) |
| 1714 |
goto out;
|
| 1715 |
|
| 1716 |
do {
|
| 1717 |
ret = qemu_savevm_state_iterate(f); |
| 1718 |
if (ret < 0) |
| 1719 |
goto out;
|
| 1720 |
} while (ret == 0); |
| 1721 |
|
| 1722 |
ret = qemu_savevm_state_complete(f); |
| 1723 |
|
| 1724 |
out:
|
| 1725 |
if (ret == 0) { |
| 1726 |
ret = qemu_file_get_error(f); |
| 1727 |
} |
| 1728 |
|
| 1729 |
return ret;
|
| 1730 |
} |
| 1731 |
|
| 1732 |
static int qemu_save_device_state(QEMUFile *f) |
| 1733 |
{
|
| 1734 |
SaveStateEntry *se; |
| 1735 |
|
| 1736 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 1737 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 1738 |
|
| 1739 |
cpu_synchronize_all_states(); |
| 1740 |
|
| 1741 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1742 |
int len;
|
| 1743 |
|
| 1744 |
if (se->is_ram) {
|
| 1745 |
continue;
|
| 1746 |
} |
| 1747 |
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
| 1748 |
continue;
|
| 1749 |
} |
| 1750 |
|
| 1751 |
/* Section type */
|
| 1752 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 1753 |
qemu_put_be32(f, se->section_id); |
| 1754 |
|
| 1755 |
/* ID string */
|
| 1756 |
len = strlen(se->idstr); |
| 1757 |
qemu_put_byte(f, len); |
| 1758 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 1759 |
|
| 1760 |
qemu_put_be32(f, se->instance_id); |
| 1761 |
qemu_put_be32(f, se->version_id); |
| 1762 |
|
| 1763 |
vmstate_save(f, se); |
| 1764 |
} |
| 1765 |
|
| 1766 |
qemu_put_byte(f, QEMU_VM_EOF); |
| 1767 |
|
| 1768 |
return qemu_file_get_error(f);
|
| 1769 |
} |
| 1770 |
|
| 1771 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 1772 |
{
|
| 1773 |
SaveStateEntry *se; |
| 1774 |
|
| 1775 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
| 1776 |
if (!strcmp(se->idstr, idstr) &&
|
| 1777 |
(instance_id == se->instance_id || |
| 1778 |
instance_id == se->alias_id)) |
| 1779 |
return se;
|
| 1780 |
/* Migrating from an older version? */
|
| 1781 |
if (strstr(se->idstr, idstr) && se->compat) {
|
| 1782 |
if (!strcmp(se->compat->idstr, idstr) &&
|
| 1783 |
(instance_id == se->compat->instance_id || |
| 1784 |
instance_id == se->alias_id)) |
| 1785 |
return se;
|
| 1786 |
} |
| 1787 |
} |
| 1788 |
return NULL; |
| 1789 |
} |
| 1790 |
|
| 1791 |
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
| 1792 |
{
|
| 1793 |
while(sub && sub->needed) {
|
| 1794 |
if (strcmp(idstr, sub->vmsd->name) == 0) { |
| 1795 |
return sub->vmsd;
|
| 1796 |
} |
| 1797 |
sub++; |
| 1798 |
} |
| 1799 |
return NULL; |
| 1800 |
} |
| 1801 |
|
| 1802 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| 1803 |
void *opaque)
|
| 1804 |
{
|
| 1805 |
while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
| 1806 |
char idstr[256]; |
| 1807 |
int ret;
|
| 1808 |
uint8_t version_id, len, size; |
| 1809 |
const VMStateDescription *sub_vmsd;
|
| 1810 |
|
| 1811 |
len = qemu_peek_byte(f, 1);
|
| 1812 |
if (len < strlen(vmsd->name) + 1) { |
| 1813 |
/* subsection name has be be "section_name/a" */
|
| 1814 |
return 0; |
| 1815 |
} |
| 1816 |
size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
|
| 1817 |
if (size != len) {
|
| 1818 |
return 0; |
| 1819 |
} |
| 1820 |
idstr[size] = 0;
|
| 1821 |
|
| 1822 |
if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
| 1823 |
/* it don't have a valid subsection name */
|
| 1824 |
return 0; |
| 1825 |
} |
| 1826 |
sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
| 1827 |
if (sub_vmsd == NULL) { |
| 1828 |
return -ENOENT;
|
| 1829 |
} |
| 1830 |
qemu_file_skip(f, 1); /* subsection */ |
| 1831 |
qemu_file_skip(f, 1); /* len */ |
| 1832 |
qemu_file_skip(f, len); /* idstr */
|
| 1833 |
version_id = qemu_get_be32(f); |
| 1834 |
|
| 1835 |
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
| 1836 |
if (ret) {
|
| 1837 |
return ret;
|
| 1838 |
} |
| 1839 |
} |
| 1840 |
return 0; |
| 1841 |
} |
| 1842 |
|
| 1843 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| 1844 |
void *opaque)
|
| 1845 |
{
|
| 1846 |
const VMStateSubsection *sub = vmsd->subsections;
|
| 1847 |
|
| 1848 |
while (sub && sub->needed) {
|
| 1849 |
if (sub->needed(opaque)) {
|
| 1850 |
const VMStateDescription *vmsd = sub->vmsd;
|
| 1851 |
uint8_t len; |
| 1852 |
|
| 1853 |
qemu_put_byte(f, QEMU_VM_SUBSECTION); |
| 1854 |
len = strlen(vmsd->name); |
| 1855 |
qemu_put_byte(f, len); |
| 1856 |
qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
| 1857 |
qemu_put_be32(f, vmsd->version_id); |
| 1858 |
vmstate_save_state(f, vmsd, opaque); |
| 1859 |
} |
| 1860 |
sub++; |
| 1861 |
} |
| 1862 |
} |
| 1863 |
|
| 1864 |
typedef struct LoadStateEntry { |
| 1865 |
QLIST_ENTRY(LoadStateEntry) entry; |
| 1866 |
SaveStateEntry *se; |
| 1867 |
int section_id;
|
| 1868 |
int version_id;
|
| 1869 |
} LoadStateEntry; |
| 1870 |
|
| 1871 |
int qemu_loadvm_state(QEMUFile *f)
|
| 1872 |
{
|
| 1873 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
| 1874 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
| 1875 |
LoadStateEntry *le, *new_le; |
| 1876 |
uint8_t section_type; |
| 1877 |
unsigned int v; |
| 1878 |
int ret;
|
| 1879 |
|
| 1880 |
if (qemu_savevm_state_blocked(NULL)) { |
| 1881 |
return -EINVAL;
|
| 1882 |
} |
| 1883 |
|
| 1884 |
v = qemu_get_be32(f); |
| 1885 |
if (v != QEMU_VM_FILE_MAGIC)
|
| 1886 |
return -EINVAL;
|
| 1887 |
|
| 1888 |
v = qemu_get_be32(f); |
| 1889 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
| 1890 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
| 1891 |
return -ENOTSUP;
|
| 1892 |
} |
| 1893 |
if (v != QEMU_VM_FILE_VERSION)
|
| 1894 |
return -ENOTSUP;
|
| 1895 |
|
| 1896 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
| 1897 |
uint32_t instance_id, version_id, section_id; |
| 1898 |
SaveStateEntry *se; |
| 1899 |
char idstr[257]; |
| 1900 |
int len;
|
| 1901 |
|
| 1902 |
switch (section_type) {
|
| 1903 |
case QEMU_VM_SECTION_START:
|
| 1904 |
case QEMU_VM_SECTION_FULL:
|
| 1905 |
/* Read section start */
|
| 1906 |
section_id = qemu_get_be32(f); |
| 1907 |
len = qemu_get_byte(f); |
| 1908 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 1909 |
idstr[len] = 0;
|
| 1910 |
instance_id = qemu_get_be32(f); |
| 1911 |
version_id = qemu_get_be32(f); |
| 1912 |
|
| 1913 |
/* Find savevm section */
|
| 1914 |
se = find_se(idstr, instance_id); |
| 1915 |
if (se == NULL) { |
| 1916 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
| 1917 |
ret = -EINVAL; |
| 1918 |
goto out;
|
| 1919 |
} |
| 1920 |
|
| 1921 |
/* Validate version */
|
| 1922 |
if (version_id > se->version_id) {
|
| 1923 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
| 1924 |
version_id, idstr, se->version_id); |
| 1925 |
ret = -EINVAL; |
| 1926 |
goto out;
|
| 1927 |
} |
| 1928 |
|
| 1929 |
/* Add entry */
|
| 1930 |
le = g_malloc0(sizeof(*le));
|
| 1931 |
|
| 1932 |
le->se = se; |
| 1933 |
le->section_id = section_id; |
| 1934 |
le->version_id = version_id; |
| 1935 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
| 1936 |
|
| 1937 |
ret = vmstate_load(f, le->se, le->version_id); |
| 1938 |
if (ret < 0) { |
| 1939 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
| 1940 |
instance_id, idstr); |
| 1941 |
goto out;
|
| 1942 |
} |
| 1943 |
break;
|
| 1944 |
case QEMU_VM_SECTION_PART:
|
| 1945 |
case QEMU_VM_SECTION_END:
|
| 1946 |
section_id = qemu_get_be32(f); |
| 1947 |
|
| 1948 |
QLIST_FOREACH(le, &loadvm_handlers, entry) {
|
| 1949 |
if (le->section_id == section_id) {
|
| 1950 |
break;
|
| 1951 |
} |
| 1952 |
} |
| 1953 |
if (le == NULL) { |
| 1954 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
| 1955 |
ret = -EINVAL; |
| 1956 |
goto out;
|
| 1957 |
} |
| 1958 |
|
| 1959 |
ret = vmstate_load(f, le->se, le->version_id); |
| 1960 |
if (ret < 0) { |
| 1961 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
| 1962 |
section_id); |
| 1963 |
goto out;
|
| 1964 |
} |
| 1965 |
break;
|
| 1966 |
default:
|
| 1967 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
| 1968 |
ret = -EINVAL; |
| 1969 |
goto out;
|
| 1970 |
} |
| 1971 |
} |
| 1972 |
|
| 1973 |
cpu_synchronize_all_post_init(); |
| 1974 |
|
| 1975 |
ret = 0;
|
| 1976 |
|
| 1977 |
out:
|
| 1978 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
|
| 1979 |
QLIST_REMOVE(le, entry); |
| 1980 |
g_free(le); |
| 1981 |
} |
| 1982 |
|
| 1983 |
if (ret == 0) { |
| 1984 |
ret = qemu_file_get_error(f); |
| 1985 |
} |
| 1986 |
|
| 1987 |
return ret;
|
| 1988 |
} |
| 1989 |
|
| 1990 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 1991 |
const char *name) |
| 1992 |
{
|
| 1993 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1994 |
int nb_sns, i, ret;
|
| 1995 |
|
| 1996 |
ret = -ENOENT; |
| 1997 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1998 |
if (nb_sns < 0) |
| 1999 |
return ret;
|
| 2000 |
for(i = 0; i < nb_sns; i++) { |
| 2001 |
sn = &sn_tab[i]; |
| 2002 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
| 2003 |
*sn_info = *sn; |
| 2004 |
ret = 0;
|
| 2005 |
break;
|
| 2006 |
} |
| 2007 |
} |
| 2008 |
g_free(sn_tab); |
| 2009 |
return ret;
|
| 2010 |
} |
| 2011 |
|
| 2012 |
/*
|
| 2013 |
* Deletes snapshots of a given name in all opened images.
|
| 2014 |
*/
|
| 2015 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
| 2016 |
{
|
| 2017 |
BlockDriverState *bs; |
| 2018 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
| 2019 |
int ret;
|
| 2020 |
|
| 2021 |
bs = NULL;
|
| 2022 |
while ((bs = bdrv_next(bs))) {
|
| 2023 |
if (bdrv_can_snapshot(bs) &&
|
| 2024 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
| 2025 |
{
|
| 2026 |
ret = bdrv_snapshot_delete(bs, name); |
| 2027 |
if (ret < 0) { |
| 2028 |
monitor_printf(mon, |
| 2029 |
"Error while deleting snapshot on '%s'\n",
|
| 2030 |
bdrv_get_device_name(bs)); |
| 2031 |
return -1; |
| 2032 |
} |
| 2033 |
} |
| 2034 |
} |
| 2035 |
|
| 2036 |
return 0; |
| 2037 |
} |
| 2038 |
|
| 2039 |
void do_savevm(Monitor *mon, const QDict *qdict) |
| 2040 |
{
|
| 2041 |
BlockDriverState *bs, *bs1; |
| 2042 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 2043 |
int ret;
|
| 2044 |
QEMUFile *f; |
| 2045 |
int saved_vm_running;
|
| 2046 |
uint64_t vm_state_size; |
| 2047 |
#ifdef _WIN32
|
| 2048 |
struct _timeb tb;
|
| 2049 |
struct tm *ptm;
|
| 2050 |
#else
|
| 2051 |
struct timeval tv;
|
| 2052 |
struct tm tm;
|
| 2053 |
#endif
|
| 2054 |
const char *name = qdict_get_try_str(qdict, "name"); |
| 2055 |
|
| 2056 |
/* Verify if there is a device that doesn't support snapshots and is writable */
|
| 2057 |
bs = NULL;
|
| 2058 |
while ((bs = bdrv_next(bs))) {
|
| 2059 |
|
| 2060 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
| 2061 |
continue;
|
| 2062 |
} |
| 2063 |
|
| 2064 |
if (!bdrv_can_snapshot(bs)) {
|
| 2065 |
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
| 2066 |
bdrv_get_device_name(bs)); |
| 2067 |
return;
|
| 2068 |
} |
| 2069 |
} |
| 2070 |
|
| 2071 |
bs = bdrv_snapshots(); |
| 2072 |
if (!bs) {
|
| 2073 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
| 2074 |
return;
|
| 2075 |
} |
| 2076 |
|
| 2077 |
saved_vm_running = runstate_is_running(); |
| 2078 |
vm_stop(RUN_STATE_SAVE_VM); |
| 2079 |
|
| 2080 |
memset(sn, 0, sizeof(*sn)); |
| 2081 |
|
| 2082 |
/* fill auxiliary fields */
|
| 2083 |
#ifdef _WIN32
|
| 2084 |
_ftime(&tb); |
| 2085 |
sn->date_sec = tb.time; |
| 2086 |
sn->date_nsec = tb.millitm * 1000000;
|
| 2087 |
#else
|
| 2088 |
gettimeofday(&tv, NULL);
|
| 2089 |
sn->date_sec = tv.tv_sec; |
| 2090 |
sn->date_nsec = tv.tv_usec * 1000;
|
| 2091 |
#endif
|
| 2092 |
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
| 2093 |
|
| 2094 |
if (name) {
|
| 2095 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
| 2096 |
if (ret >= 0) { |
| 2097 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
| 2098 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
| 2099 |
} else {
|
| 2100 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
| 2101 |
} |
| 2102 |
} else {
|
| 2103 |
#ifdef _WIN32
|
| 2104 |
time_t t = tb.time; |
| 2105 |
ptm = localtime(&t); |
| 2106 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
| 2107 |
#else
|
| 2108 |
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
| 2109 |
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
| 2110 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
| 2111 |
#endif
|
| 2112 |
} |
| 2113 |
|
| 2114 |
/* Delete old snapshots of the same name */
|
| 2115 |
if (name && del_existing_snapshots(mon, name) < 0) { |
| 2116 |
goto the_end;
|
| 2117 |
} |
| 2118 |
|
| 2119 |
/* save the VM state */
|
| 2120 |
f = qemu_fopen_bdrv(bs, 1);
|
| 2121 |
if (!f) {
|
| 2122 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 2123 |
goto the_end;
|
| 2124 |
} |
| 2125 |
ret = qemu_savevm_state(f); |
| 2126 |
vm_state_size = qemu_ftell(f); |
| 2127 |
qemu_fclose(f); |
| 2128 |
if (ret < 0) { |
| 2129 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
| 2130 |
goto the_end;
|
| 2131 |
} |
| 2132 |
|
| 2133 |
/* create the snapshots */
|
| 2134 |
|
| 2135 |
bs1 = NULL;
|
| 2136 |
while ((bs1 = bdrv_next(bs1))) {
|
| 2137 |
if (bdrv_can_snapshot(bs1)) {
|
| 2138 |
/* Write VM state size only to the image that contains the state */
|
| 2139 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
| 2140 |
ret = bdrv_snapshot_create(bs1, sn); |
| 2141 |
if (ret < 0) { |
| 2142 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
| 2143 |
bdrv_get_device_name(bs1)); |
| 2144 |
} |
| 2145 |
} |
| 2146 |
} |
| 2147 |
|
| 2148 |
the_end:
|
| 2149 |
if (saved_vm_running)
|
| 2150 |
vm_start(); |
| 2151 |
} |
| 2152 |
|
| 2153 |
void qmp_xen_save_devices_state(const char *filename, Error **errp) |
| 2154 |
{
|
| 2155 |
QEMUFile *f; |
| 2156 |
int saved_vm_running;
|
| 2157 |
int ret;
|
| 2158 |
|
| 2159 |
saved_vm_running = runstate_is_running(); |
| 2160 |
vm_stop(RUN_STATE_SAVE_VM); |
| 2161 |
|
| 2162 |
f = qemu_fopen(filename, "wb");
|
| 2163 |
if (!f) {
|
| 2164 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
| 2165 |
goto the_end;
|
| 2166 |
} |
| 2167 |
ret = qemu_save_device_state(f); |
| 2168 |
qemu_fclose(f); |
| 2169 |
if (ret < 0) { |
| 2170 |
error_set(errp, QERR_IO_ERROR); |
| 2171 |
} |
| 2172 |
|
| 2173 |
the_end:
|
| 2174 |
if (saved_vm_running)
|
| 2175 |
vm_start(); |
| 2176 |
} |
| 2177 |
|
| 2178 |
int load_vmstate(const char *name) |
| 2179 |
{
|
| 2180 |
BlockDriverState *bs, *bs_vm_state; |
| 2181 |
QEMUSnapshotInfo sn; |
| 2182 |
QEMUFile *f; |
| 2183 |
int ret;
|
| 2184 |
|
| 2185 |
bs_vm_state = bdrv_snapshots(); |
| 2186 |
if (!bs_vm_state) {
|
| 2187 |
error_report("No block device supports snapshots");
|
| 2188 |
return -ENOTSUP;
|
| 2189 |
} |
| 2190 |
|
| 2191 |
/* Don't even try to load empty VM states */
|
| 2192 |
ret = bdrv_snapshot_find(bs_vm_state, &sn, name); |
| 2193 |
if (ret < 0) { |
| 2194 |
return ret;
|
| 2195 |
} else if (sn.vm_state_size == 0) { |
| 2196 |
error_report("This is a disk-only snapshot. Revert to it offline "
|
| 2197 |
"using qemu-img.");
|
| 2198 |
return -EINVAL;
|
| 2199 |
} |
| 2200 |
|
| 2201 |
/* Verify if there is any device that doesn't support snapshots and is
|
| 2202 |
writable and check if the requested snapshot is available too. */
|
| 2203 |
bs = NULL;
|
| 2204 |
while ((bs = bdrv_next(bs))) {
|
| 2205 |
|
| 2206 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
| 2207 |
continue;
|
| 2208 |
} |
| 2209 |
|
| 2210 |
if (!bdrv_can_snapshot(bs)) {
|
| 2211 |
error_report("Device '%s' is writable but does not support snapshots.",
|
| 2212 |
bdrv_get_device_name(bs)); |
| 2213 |
return -ENOTSUP;
|
| 2214 |
} |
| 2215 |
|
| 2216 |
ret = bdrv_snapshot_find(bs, &sn, name); |
| 2217 |
if (ret < 0) { |
| 2218 |
error_report("Device '%s' does not have the requested snapshot '%s'",
|
| 2219 |
bdrv_get_device_name(bs), name); |
| 2220 |
return ret;
|
| 2221 |
} |
| 2222 |
} |
| 2223 |
|
| 2224 |
/* Flush all IO requests so they don't interfere with the new state. */
|
| 2225 |
bdrv_drain_all(); |
| 2226 |
|
| 2227 |
bs = NULL;
|
| 2228 |
while ((bs = bdrv_next(bs))) {
|
| 2229 |
if (bdrv_can_snapshot(bs)) {
|
| 2230 |
ret = bdrv_snapshot_goto(bs, name); |
| 2231 |
if (ret < 0) { |
| 2232 |
error_report("Error %d while activating snapshot '%s' on '%s'",
|
| 2233 |
ret, name, bdrv_get_device_name(bs)); |
| 2234 |
return ret;
|
| 2235 |
} |
| 2236 |
} |
| 2237 |
} |
| 2238 |
|
| 2239 |
/* restore the VM state */
|
| 2240 |
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
| 2241 |
if (!f) {
|
| 2242 |
error_report("Could not open VM state file");
|
| 2243 |
return -EINVAL;
|
| 2244 |
} |
| 2245 |
|
| 2246 |
qemu_system_reset(VMRESET_SILENT); |
| 2247 |
ret = qemu_loadvm_state(f); |
| 2248 |
|
| 2249 |
qemu_fclose(f); |
| 2250 |
if (ret < 0) { |
| 2251 |
error_report("Error %d while loading VM state", ret);
|
| 2252 |
return ret;
|
| 2253 |
} |
| 2254 |
|
| 2255 |
return 0; |
| 2256 |
} |
| 2257 |
|
| 2258 |
void do_delvm(Monitor *mon, const QDict *qdict) |
| 2259 |
{
|
| 2260 |
BlockDriverState *bs, *bs1; |
| 2261 |
int ret;
|
| 2262 |
const char *name = qdict_get_str(qdict, "name"); |
| 2263 |
|
| 2264 |
bs = bdrv_snapshots(); |
| 2265 |
if (!bs) {
|
| 2266 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 2267 |
return;
|
| 2268 |
} |
| 2269 |
|
| 2270 |
bs1 = NULL;
|
| 2271 |
while ((bs1 = bdrv_next(bs1))) {
|
| 2272 |
if (bdrv_can_snapshot(bs1)) {
|
| 2273 |
ret = bdrv_snapshot_delete(bs1, name); |
| 2274 |
if (ret < 0) { |
| 2275 |
if (ret == -ENOTSUP)
|
| 2276 |
monitor_printf(mon, |
| 2277 |
"Snapshots not supported on device '%s'\n",
|
| 2278 |
bdrv_get_device_name(bs1)); |
| 2279 |
else
|
| 2280 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
| 2281 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
| 2282 |
} |
| 2283 |
} |
| 2284 |
} |
| 2285 |
} |
| 2286 |
|
| 2287 |
void do_info_snapshots(Monitor *mon)
|
| 2288 |
{
|
| 2289 |
BlockDriverState *bs, *bs1; |
| 2290 |
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
| 2291 |
int nb_sns, i, ret, available;
|
| 2292 |
int total;
|
| 2293 |
int *available_snapshots;
|
| 2294 |
char buf[256]; |
| 2295 |
|
| 2296 |
bs = bdrv_snapshots(); |
| 2297 |
if (!bs) {
|
| 2298 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
| 2299 |
return;
|
| 2300 |
} |
| 2301 |
|
| 2302 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 2303 |
if (nb_sns < 0) { |
| 2304 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
| 2305 |
return;
|
| 2306 |
} |
| 2307 |
|
| 2308 |
if (nb_sns == 0) { |
| 2309 |
monitor_printf(mon, "There is no snapshot available.\n");
|
| 2310 |
return;
|
| 2311 |
} |
| 2312 |
|
| 2313 |
available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
| 2314 |
total = 0;
|
| 2315 |
for (i = 0; i < nb_sns; i++) { |
| 2316 |
sn = &sn_tab[i]; |
| 2317 |
available = 1;
|
| 2318 |
bs1 = NULL;
|
| 2319 |
|
| 2320 |
while ((bs1 = bdrv_next(bs1))) {
|
| 2321 |
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
| 2322 |
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); |
| 2323 |
if (ret < 0) { |
| 2324 |
available = 0;
|
| 2325 |
break;
|
| 2326 |
} |
| 2327 |
} |
| 2328 |
} |
| 2329 |
|
| 2330 |
if (available) {
|
| 2331 |
available_snapshots[total] = i; |
| 2332 |
total++; |
| 2333 |
} |
| 2334 |
} |
| 2335 |
|
| 2336 |
if (total > 0) { |
| 2337 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 2338 |
for (i = 0; i < total; i++) { |
| 2339 |
sn = &sn_tab[available_snapshots[i]]; |
| 2340 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 2341 |
} |
| 2342 |
} else {
|
| 2343 |
monitor_printf(mon, "There is no suitable snapshot available\n");
|
| 2344 |
} |
| 2345 |
|
| 2346 |
g_free(sn_tab); |
| 2347 |
g_free(available_snapshots); |
| 2348 |
|
| 2349 |
} |
| 2350 |
|
| 2351 |
void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
|
| 2352 |
{
|
| 2353 |
qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
| 2354 |
memory_region_name(mr), dev); |
| 2355 |
} |
| 2356 |
|
| 2357 |
void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
|
| 2358 |
{
|
| 2359 |
/* Nothing do to while the implementation is in RAMBlock */
|
| 2360 |
} |
| 2361 |
|
| 2362 |
void vmstate_register_ram_global(MemoryRegion *mr)
|
| 2363 |
{
|
| 2364 |
vmstate_register_ram(mr, NULL);
|
| 2365 |
} |
| 2366 |
|
| 2367 |
/*
|
| 2368 |
page = zrun nzrun
|
| 2369 |
| zrun nzrun page
|
| 2370 |
|
| 2371 |
zrun = length
|
| 2372 |
|
| 2373 |
nzrun = length byte...
|
| 2374 |
|
| 2375 |
length = uleb128 encoded integer
|
| 2376 |
*/
|
| 2377 |
int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, |
| 2378 |
uint8_t *dst, int dlen)
|
| 2379 |
{
|
| 2380 |
uint32_t zrun_len = 0, nzrun_len = 0; |
| 2381 |
int d = 0, i = 0; |
| 2382 |
long res, xor;
|
| 2383 |
uint8_t *nzrun_start = NULL;
|
| 2384 |
|
| 2385 |
g_assert(!(((uintptr_t)old_buf | (uintptr_t)new_buf | slen) % |
| 2386 |
sizeof(long))); |
| 2387 |
|
| 2388 |
while (i < slen) {
|
| 2389 |
/* overflow */
|
| 2390 |
if (d + 2 > dlen) { |
| 2391 |
return -1; |
| 2392 |
} |
| 2393 |
|
| 2394 |
/* not aligned to sizeof(long) */
|
| 2395 |
res = (slen - i) % sizeof(long); |
| 2396 |
while (res && old_buf[i] == new_buf[i]) {
|
| 2397 |
zrun_len++; |
| 2398 |
i++; |
| 2399 |
res--; |
| 2400 |
} |
| 2401 |
|
| 2402 |
/* word at a time for speed */
|
| 2403 |
if (!res) {
|
| 2404 |
while (i < slen &&
|
| 2405 |
(*(long *)(old_buf + i)) == (*(long *)(new_buf + i))) { |
| 2406 |
i += sizeof(long); |
| 2407 |
zrun_len += sizeof(long); |
| 2408 |
} |
| 2409 |
|
| 2410 |
/* go over the rest */
|
| 2411 |
while (i < slen && old_buf[i] == new_buf[i]) {
|
| 2412 |
zrun_len++; |
| 2413 |
i++; |
| 2414 |
} |
| 2415 |
} |
| 2416 |
|
| 2417 |
/* buffer unchanged */
|
| 2418 |
if (zrun_len == slen) {
|
| 2419 |
return 0; |
| 2420 |
} |
| 2421 |
|
| 2422 |
/* skip last zero run */
|
| 2423 |
if (i == slen) {
|
| 2424 |
return d;
|
| 2425 |
} |
| 2426 |
|
| 2427 |
d += uleb128_encode_small(dst + d, zrun_len); |
| 2428 |
|
| 2429 |
zrun_len = 0;
|
| 2430 |
nzrun_start = new_buf + i; |
| 2431 |
|
| 2432 |
/* overflow */
|
| 2433 |
if (d + 2 > dlen) { |
| 2434 |
return -1; |
| 2435 |
} |
| 2436 |
/* not aligned to sizeof(long) */
|
| 2437 |
res = (slen - i) % sizeof(long); |
| 2438 |
while (res && old_buf[i] != new_buf[i]) {
|
| 2439 |
i++; |
| 2440 |
nzrun_len++; |
| 2441 |
res--; |
| 2442 |
} |
| 2443 |
|
| 2444 |
/* word at a time for speed, use of 32-bit long okay */
|
| 2445 |
if (!res) {
|
| 2446 |
/* truncation to 32-bit long okay */
|
| 2447 |
long mask = (long)0x0101010101010101ULL; |
| 2448 |
while (i < slen) {
|
| 2449 |
xor = *(long *)(old_buf + i) ^ *(long *)(new_buf + i); |
| 2450 |
if ((xor - mask) & ~xor & (mask << 7)) { |
| 2451 |
/* found the end of an nzrun within the current long */
|
| 2452 |
while (old_buf[i] != new_buf[i]) {
|
| 2453 |
nzrun_len++; |
| 2454 |
i++; |
| 2455 |
} |
| 2456 |
break;
|
| 2457 |
} else {
|
| 2458 |
i += sizeof(long); |
| 2459 |
nzrun_len += sizeof(long); |
| 2460 |
} |
| 2461 |
} |
| 2462 |
} |
| 2463 |
|
| 2464 |
d += uleb128_encode_small(dst + d, nzrun_len); |
| 2465 |
/* overflow */
|
| 2466 |
if (d + nzrun_len > dlen) {
|
| 2467 |
return -1; |
| 2468 |
} |
| 2469 |
memcpy(dst + d, nzrun_start, nzrun_len); |
| 2470 |
d += nzrun_len; |
| 2471 |
nzrun_len = 0;
|
| 2472 |
} |
| 2473 |
|
| 2474 |
return d;
|
| 2475 |
} |
| 2476 |
|
| 2477 |
int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen) |
| 2478 |
{
|
| 2479 |
int i = 0, d = 0; |
| 2480 |
int ret;
|
| 2481 |
uint32_t count = 0;
|
| 2482 |
|
| 2483 |
while (i < slen) {
|
| 2484 |
|
| 2485 |
/* zrun */
|
| 2486 |
if ((slen - i) < 2) { |
| 2487 |
return -1; |
| 2488 |
} |
| 2489 |
|
| 2490 |
ret = uleb128_decode_small(src + i, &count); |
| 2491 |
if (ret < 0 || (i && !count)) { |
| 2492 |
return -1; |
| 2493 |
} |
| 2494 |
i += ret; |
| 2495 |
d += count; |
| 2496 |
|
| 2497 |
/* overflow */
|
| 2498 |
if (d > dlen) {
|
| 2499 |
return -1; |
| 2500 |
} |
| 2501 |
|
| 2502 |
/* nzrun */
|
| 2503 |
if ((slen - i) < 2) { |
| 2504 |
return -1; |
| 2505 |
} |
| 2506 |
|
| 2507 |
ret = uleb128_decode_small(src + i, &count); |
| 2508 |
if (ret < 0 || !count) { |
| 2509 |
return -1; |
| 2510 |
} |
| 2511 |
i += ret; |
| 2512 |
|
| 2513 |
/* overflow */
|
| 2514 |
if (d + count > dlen || i + count > slen) {
|
| 2515 |
return -1; |
| 2516 |
} |
| 2517 |
|
| 2518 |
memcpy(dst + d, src + i, count); |
| 2519 |
d += count; |
| 2520 |
i += count; |
| 2521 |
} |
| 2522 |
|
| 2523 |
return d;
|
| 2524 |
} |