mirror of https://github.com/proxmox/mirror_qemu
1712 lines
41 KiB
C
1712 lines
41 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
#include <sys/time.h>
|
|
#include <zlib.h>
|
|
|
|
/* Needed early for CONFIG_BSD etc. */
|
|
#include "config-host.h"
|
|
|
|
#ifndef _WIN32
|
|
#include <sys/times.h>
|
|
#include <sys/wait.h>
|
|
#include <termios.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <net/if.h>
|
|
#if defined(__NetBSD__)
|
|
#include <net/if_tap.h>
|
|
#endif
|
|
#ifdef __linux__
|
|
#include <linux/if_tun.h>
|
|
#endif
|
|
#include <arpa/inet.h>
|
|
#include <dirent.h>
|
|
#include <netdb.h>
|
|
#include <sys/select.h>
|
|
#ifdef CONFIG_BSD
|
|
#include <sys/stat.h>
|
|
#if defined(__FreeBSD__) || defined(__DragonFly__)
|
|
#include <libutil.h>
|
|
#else
|
|
#include <util.h>
|
|
#endif
|
|
#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
|
|
#include <freebsd/stdlib.h>
|
|
#else
|
|
#ifdef __linux__
|
|
#include <pty.h>
|
|
#include <malloc.h>
|
|
#include <linux/rtc.h>
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#include <malloc.h>
|
|
#include <sys/timeb.h>
|
|
#include <mmsystem.h>
|
|
#define getopt_long_only getopt_long
|
|
#define memalign(align, size) malloc(size)
|
|
#endif
|
|
|
|
#include "qemu-common.h"
|
|
#include "hw/hw.h"
|
|
#include "net.h"
|
|
#include "monitor.h"
|
|
#include "sysemu.h"
|
|
#include "qemu-timer.h"
|
|
#include "qemu-char.h"
|
|
#include "block.h"
|
|
#include "audio/audio.h"
|
|
#include "migration.h"
|
|
#include "qemu_socket.h"
|
|
#include "qemu-queue.h"
|
|
|
|
/* point to the block driver where the snapshots are managed */
|
|
static BlockDriverState *bs_snapshots;
|
|
|
|
#define SELF_ANNOUNCE_ROUNDS 5
|
|
#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
|
|
//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
|
|
#define EXPERIMENTAL_MAGIC 0xf1f23f4f
|
|
|
|
static int announce_self_create(uint8_t *buf,
|
|
uint8_t *mac_addr)
|
|
{
|
|
uint32_t magic = EXPERIMENTAL_MAGIC;
|
|
uint16_t proto = htons(ETH_P_EXPERIMENTAL);
|
|
|
|
/* FIXME: should we send a different packet (arp/rarp/ping)? */
|
|
|
|
memset(buf, 0, 64);
|
|
memset(buf, 0xff, 6); /* h_dst */
|
|
memcpy(buf + 6, mac_addr, 6); /* h_src */
|
|
memcpy(buf + 12, &proto, 2); /* h_proto */
|
|
memcpy(buf + 14, &magic, 4); /* magic */
|
|
|
|
return 64; /* len */
|
|
}
|
|
|
|
static void qemu_announce_self_once(void *opaque)
|
|
{
|
|
int i, len;
|
|
VLANState *vlan;
|
|
VLANClientState *vc;
|
|
uint8_t buf[256];
|
|
static int count = SELF_ANNOUNCE_ROUNDS;
|
|
QEMUTimer *timer = *(QEMUTimer **)opaque;
|
|
|
|
for (i = 0; i < MAX_NICS; i++) {
|
|
if (!nd_table[i].used)
|
|
continue;
|
|
len = announce_self_create(buf, nd_table[i].macaddr);
|
|
vlan = nd_table[i].vlan;
|
|
for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
|
|
vc->receive(vc, buf, len);
|
|
}
|
|
}
|
|
if (count--) {
|
|
qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100);
|
|
} else {
|
|
qemu_del_timer(timer);
|
|
qemu_free_timer(timer);
|
|
}
|
|
}
|
|
|
|
void qemu_announce_self(void)
|
|
{
|
|
static QEMUTimer *timer;
|
|
timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer);
|
|
qemu_announce_self_once(&timer);
|
|
}
|
|
|
|
/***********************************************************/
|
|
/* savevm/loadvm support */
|
|
|
|
#define IO_BUF_SIZE 32768
|
|
|
|
struct QEMUFile {
|
|
QEMUFilePutBufferFunc *put_buffer;
|
|
QEMUFileGetBufferFunc *get_buffer;
|
|
QEMUFileCloseFunc *close;
|
|
QEMUFileRateLimit *rate_limit;
|
|
QEMUFileSetRateLimit *set_rate_limit;
|
|
void *opaque;
|
|
int is_write;
|
|
|
|
int64_t buf_offset; /* start of buffer when writing, end of buffer
|
|
when reading */
|
|
int buf_index;
|
|
int buf_size; /* 0 when writing */
|
|
uint8_t buf[IO_BUF_SIZE];
|
|
|
|
int has_error;
|
|
};
|
|
|
|
typedef struct QEMUFileStdio
|
|
{
|
|
FILE *stdio_file;
|
|
QEMUFile *file;
|
|
} QEMUFileStdio;
|
|
|
|
typedef struct QEMUFileSocket
|
|
{
|
|
int fd;
|
|
QEMUFile *file;
|
|
} QEMUFileSocket;
|
|
|
|
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
QEMUFileSocket *s = opaque;
|
|
ssize_t len;
|
|
|
|
do {
|
|
len = recv(s->fd, (void *)buf, size, 0);
|
|
} while (len == -1 && socket_error() == EINTR);
|
|
|
|
if (len == -1)
|
|
len = -socket_error();
|
|
|
|
return len;
|
|
}
|
|
|
|
static int socket_close(void *opaque)
|
|
{
|
|
QEMUFileSocket *s = opaque;
|
|
qemu_free(s);
|
|
return 0;
|
|
}
|
|
|
|
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
return fwrite(buf, 1, size, s->stdio_file);
|
|
}
|
|
|
|
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
FILE *fp = s->stdio_file;
|
|
int bytes;
|
|
|
|
do {
|
|
clearerr(fp);
|
|
bytes = fread(buf, 1, size, fp);
|
|
} while ((bytes == 0) && ferror(fp) && (errno == EINTR));
|
|
return bytes;
|
|
}
|
|
|
|
static int stdio_pclose(void *opaque)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
pclose(s->stdio_file);
|
|
qemu_free(s);
|
|
return 0;
|
|
}
|
|
|
|
static int stdio_fclose(void *opaque)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
fclose(s->stdio_file);
|
|
qemu_free(s);
|
|
return 0;
|
|
}
|
|
|
|
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
|
|
{
|
|
QEMUFileStdio *s;
|
|
|
|
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
|
|
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
|
|
|
s->stdio_file = stdio_file;
|
|
|
|
if(mode[0] == 'r') {
|
|
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL);
|
|
} else {
|
|
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL);
|
|
}
|
|
return s->file;
|
|
}
|
|
|
|
QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
|
|
{
|
|
FILE *popen_file;
|
|
|
|
popen_file = popen(command, mode);
|
|
if(popen_file == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
return qemu_popen(popen_file, mode);
|
|
}
|
|
|
|
int qemu_stdio_fd(QEMUFile *f)
|
|
{
|
|
QEMUFileStdio *p;
|
|
int fd;
|
|
|
|
p = (QEMUFileStdio *)f->opaque;
|
|
fd = fileno(p->stdio_file);
|
|
|
|
return fd;
|
|
}
|
|
|
|
QEMUFile *qemu_fdopen(int fd, const char *mode)
|
|
{
|
|
QEMUFileStdio *s;
|
|
|
|
if (mode == NULL ||
|
|
(mode[0] != 'r' && mode[0] != 'w') ||
|
|
mode[1] != 'b' || mode[2] != 0) {
|
|
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
|
s->stdio_file = fdopen(fd, mode);
|
|
if (!s->stdio_file)
|
|
goto fail;
|
|
|
|
if(mode[0] == 'r') {
|
|
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL);
|
|
} else {
|
|
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL);
|
|
}
|
|
return s->file;
|
|
|
|
fail:
|
|
qemu_free(s);
|
|
return NULL;
|
|
}
|
|
|
|
QEMUFile *qemu_fopen_socket(int fd)
|
|
{
|
|
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
|
|
|
s->fd = fd;
|
|
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL);
|
|
return s->file;
|
|
}
|
|
|
|
static int file_put_buffer(void *opaque, const uint8_t *buf,
|
|
int64_t pos, int size)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
fseek(s->stdio_file, pos, SEEK_SET);
|
|
fwrite(buf, 1, size, s->stdio_file);
|
|
return size;
|
|
}
|
|
|
|
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
QEMUFileStdio *s = opaque;
|
|
fseek(s->stdio_file, pos, SEEK_SET);
|
|
return fread(buf, 1, size, s->stdio_file);
|
|
}
|
|
|
|
QEMUFile *qemu_fopen(const char *filename, const char *mode)
|
|
{
|
|
QEMUFileStdio *s;
|
|
|
|
if (mode == NULL ||
|
|
(mode[0] != 'r' && mode[0] != 'w') ||
|
|
mode[1] != 'b' || mode[2] != 0) {
|
|
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
|
|
|
s->stdio_file = fopen(filename, mode);
|
|
if (!s->stdio_file)
|
|
goto fail;
|
|
|
|
if(mode[0] == 'w') {
|
|
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL);
|
|
} else {
|
|
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL);
|
|
}
|
|
return s->file;
|
|
fail:
|
|
qemu_free(s);
|
|
return NULL;
|
|
}
|
|
|
|
static int block_put_buffer(void *opaque, const uint8_t *buf,
|
|
int64_t pos, int size)
|
|
{
|
|
bdrv_save_vmstate(opaque, buf, pos, size);
|
|
return size;
|
|
}
|
|
|
|
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
return bdrv_load_vmstate(opaque, buf, pos, size);
|
|
}
|
|
|
|
static int bdrv_fclose(void *opaque)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
|
|
{
|
|
if (is_writable)
|
|
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);
|
|
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
|
|
}
|
|
|
|
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
|
QEMUFileGetBufferFunc *get_buffer,
|
|
QEMUFileCloseFunc *close,
|
|
QEMUFileRateLimit *rate_limit,
|
|
QEMUFileSetRateLimit *set_rate_limit)
|
|
{
|
|
QEMUFile *f;
|
|
|
|
f = qemu_mallocz(sizeof(QEMUFile));
|
|
|
|
f->opaque = opaque;
|
|
f->put_buffer = put_buffer;
|
|
f->get_buffer = get_buffer;
|
|
f->close = close;
|
|
f->rate_limit = rate_limit;
|
|
f->set_rate_limit = set_rate_limit;
|
|
f->is_write = 0;
|
|
|
|
return f;
|
|
}
|
|
|
|
int qemu_file_has_error(QEMUFile *f)
|
|
{
|
|
return f->has_error;
|
|
}
|
|
|
|
void qemu_file_set_error(QEMUFile *f)
|
|
{
|
|
f->has_error = 1;
|
|
}
|
|
|
|
void qemu_fflush(QEMUFile *f)
|
|
{
|
|
if (!f->put_buffer)
|
|
return;
|
|
|
|
if (f->is_write && f->buf_index > 0) {
|
|
int len;
|
|
|
|
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
|
|
if (len > 0)
|
|
f->buf_offset += f->buf_index;
|
|
else
|
|
f->has_error = 1;
|
|
f->buf_index = 0;
|
|
}
|
|
}
|
|
|
|
static void qemu_fill_buffer(QEMUFile *f)
|
|
{
|
|
int len;
|
|
|
|
if (!f->get_buffer)
|
|
return;
|
|
|
|
if (f->is_write)
|
|
abort();
|
|
|
|
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
|
|
if (len > 0) {
|
|
f->buf_index = 0;
|
|
f->buf_size = len;
|
|
f->buf_offset += len;
|
|
} else if (len != -EAGAIN)
|
|
f->has_error = 1;
|
|
}
|
|
|
|
int qemu_fclose(QEMUFile *f)
|
|
{
|
|
int ret = 0;
|
|
qemu_fflush(f);
|
|
if (f->close)
|
|
ret = f->close(f->opaque);
|
|
qemu_free(f);
|
|
return ret;
|
|
}
|
|
|
|
void qemu_file_put_notify(QEMUFile *f)
|
|
{
|
|
f->put_buffer(f->opaque, NULL, 0, 0);
|
|
}
|
|
|
|
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
|
|
{
|
|
int l;
|
|
|
|
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
|
|
fprintf(stderr,
|
|
"Attempted to write to buffer while read buffer is not empty\n");
|
|
abort();
|
|
}
|
|
|
|
while (!f->has_error && size > 0) {
|
|
l = IO_BUF_SIZE - f->buf_index;
|
|
if (l > size)
|
|
l = size;
|
|
memcpy(f->buf + f->buf_index, buf, l);
|
|
f->is_write = 1;
|
|
f->buf_index += l;
|
|
buf += l;
|
|
size -= l;
|
|
if (f->buf_index >= IO_BUF_SIZE)
|
|
qemu_fflush(f);
|
|
}
|
|
}
|
|
|
|
void qemu_put_byte(QEMUFile *f, int v)
|
|
{
|
|
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
|
|
fprintf(stderr,
|
|
"Attempted to write to buffer while read buffer is not empty\n");
|
|
abort();
|
|
}
|
|
|
|
f->buf[f->buf_index++] = v;
|
|
f->is_write = 1;
|
|
if (f->buf_index >= IO_BUF_SIZE)
|
|
qemu_fflush(f);
|
|
}
|
|
|
|
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
|
|
{
|
|
int size, l;
|
|
|
|
if (f->is_write)
|
|
abort();
|
|
|
|
size = size1;
|
|
while (size > 0) {
|
|
l = f->buf_size - f->buf_index;
|
|
if (l == 0) {
|
|
qemu_fill_buffer(f);
|
|
l = f->buf_size - f->buf_index;
|
|
if (l == 0)
|
|
break;
|
|
}
|
|
if (l > size)
|
|
l = size;
|
|
memcpy(buf, f->buf + f->buf_index, l);
|
|
f->buf_index += l;
|
|
buf += l;
|
|
size -= l;
|
|
}
|
|
return size1 - size;
|
|
}
|
|
|
|
int qemu_get_byte(QEMUFile *f)
|
|
{
|
|
if (f->is_write)
|
|
abort();
|
|
|
|
if (f->buf_index >= f->buf_size) {
|
|
qemu_fill_buffer(f);
|
|
if (f->buf_index >= f->buf_size)
|
|
return 0;
|
|
}
|
|
return f->buf[f->buf_index++];
|
|
}
|
|
|
|
int64_t qemu_ftell(QEMUFile *f)
|
|
{
|
|
return f->buf_offset - f->buf_size + f->buf_index;
|
|
}
|
|
|
|
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
|
{
|
|
if (whence == SEEK_SET) {
|
|
/* nothing to do */
|
|
} else if (whence == SEEK_CUR) {
|
|
pos += qemu_ftell(f);
|
|
} else {
|
|
/* SEEK_END not supported */
|
|
return -1;
|
|
}
|
|
if (f->put_buffer) {
|
|
qemu_fflush(f);
|
|
f->buf_offset = pos;
|
|
} else {
|
|
f->buf_offset = pos;
|
|
f->buf_index = 0;
|
|
f->buf_size = 0;
|
|
}
|
|
return pos;
|
|
}
|
|
|
|
int qemu_file_rate_limit(QEMUFile *f)
|
|
{
|
|
if (f->rate_limit)
|
|
return f->rate_limit(f->opaque);
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate)
|
|
{
|
|
/* any failed or completed migration keeps its state to allow probing of
|
|
* migration data, but has no associated file anymore */
|
|
if (f && f->set_rate_limit)
|
|
return f->set_rate_limit(f->opaque, new_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void qemu_put_be16(QEMUFile *f, unsigned int v)
|
|
{
|
|
qemu_put_byte(f, v >> 8);
|
|
qemu_put_byte(f, v);
|
|
}
|
|
|
|
void qemu_put_be32(QEMUFile *f, unsigned int v)
|
|
{
|
|
qemu_put_byte(f, v >> 24);
|
|
qemu_put_byte(f, v >> 16);
|
|
qemu_put_byte(f, v >> 8);
|
|
qemu_put_byte(f, v);
|
|
}
|
|
|
|
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
|
{
|
|
qemu_put_be32(f, v >> 32);
|
|
qemu_put_be32(f, v);
|
|
}
|
|
|
|
unsigned int qemu_get_be16(QEMUFile *f)
|
|
{
|
|
unsigned int v;
|
|
v = qemu_get_byte(f) << 8;
|
|
v |= qemu_get_byte(f);
|
|
return v;
|
|
}
|
|
|
|
unsigned int qemu_get_be32(QEMUFile *f)
|
|
{
|
|
unsigned int v;
|
|
v = qemu_get_byte(f) << 24;
|
|
v |= qemu_get_byte(f) << 16;
|
|
v |= qemu_get_byte(f) << 8;
|
|
v |= qemu_get_byte(f);
|
|
return v;
|
|
}
|
|
|
|
uint64_t qemu_get_be64(QEMUFile *f)
|
|
{
|
|
uint64_t v;
|
|
v = (uint64_t)qemu_get_be32(f) << 32;
|
|
v |= qemu_get_be32(f);
|
|
return v;
|
|
}
|
|
|
|
/* 8 bit int */
|
|
|
|
static int get_int8(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int8_t *v = pv;
|
|
qemu_get_s8s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_int8(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int8_t *v = pv;
|
|
qemu_put_s8s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int8 = {
|
|
.name = "int8",
|
|
.get = get_int8,
|
|
.put = put_int8,
|
|
};
|
|
|
|
/* 16 bit int */
|
|
|
|
static int get_int16(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int16_t *v = pv;
|
|
qemu_get_sbe16s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_int16(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int16_t *v = pv;
|
|
qemu_put_sbe16s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int16 = {
|
|
.name = "int16",
|
|
.get = get_int16,
|
|
.put = put_int16,
|
|
};
|
|
|
|
/* 32 bit int */
|
|
|
|
static int get_int32(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int32_t *v = pv;
|
|
qemu_get_sbe32s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_int32(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int32_t *v = pv;
|
|
qemu_put_sbe32s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int32 = {
|
|
.name = "int32",
|
|
.get = get_int32,
|
|
.put = put_int32,
|
|
};
|
|
|
|
/* 32 bit int. See that the received value is the same than the one
|
|
in the field */
|
|
|
|
static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int32_t *v = pv;
|
|
int32_t v2;
|
|
qemu_get_sbe32s(f, &v2);
|
|
|
|
if (*v == v2)
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int32_equal = {
|
|
.name = "int32 equal",
|
|
.get = get_int32_equal,
|
|
.put = put_int32,
|
|
};
|
|
|
|
/* 32 bit int. See that the received value is the less or the same
|
|
than the one in the field */
|
|
|
|
static int get_int32_le(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int32_t *old = pv;
|
|
int32_t new;
|
|
qemu_get_sbe32s(f, &new);
|
|
|
|
if (*old <= new)
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int32_le = {
|
|
.name = "int32 equal",
|
|
.get = get_int32_le,
|
|
.put = put_int32,
|
|
};
|
|
|
|
/* 64 bit int */
|
|
|
|
static int get_int64(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int64_t *v = pv;
|
|
qemu_get_sbe64s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_int64(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
int64_t *v = pv;
|
|
qemu_put_sbe64s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_int64 = {
|
|
.name = "int64",
|
|
.get = get_int64,
|
|
.put = put_int64,
|
|
};
|
|
|
|
/* 8 bit unsigned int */
|
|
|
|
static int get_uint8(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t *v = pv;
|
|
qemu_get_8s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_uint8(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t *v = pv;
|
|
qemu_put_8s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint8 = {
|
|
.name = "uint8",
|
|
.get = get_uint8,
|
|
.put = put_uint8,
|
|
};
|
|
|
|
/* 16 bit unsigned int */
|
|
|
|
static int get_uint16(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint16_t *v = pv;
|
|
qemu_get_be16s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_uint16(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint16_t *v = pv;
|
|
qemu_put_be16s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint16 = {
|
|
.name = "uint16",
|
|
.get = get_uint16,
|
|
.put = put_uint16,
|
|
};
|
|
|
|
/* 32 bit unsigned int */
|
|
|
|
static int get_uint32(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint32_t *v = pv;
|
|
qemu_get_be32s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_uint32(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint32_t *v = pv;
|
|
qemu_put_be32s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint32 = {
|
|
.name = "uint32",
|
|
.get = get_uint32,
|
|
.put = put_uint32,
|
|
};
|
|
|
|
/* 64 bit unsigned int */
|
|
|
|
static int get_uint64(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint64_t *v = pv;
|
|
qemu_get_be64s(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_uint64(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint64_t *v = pv;
|
|
qemu_put_be64s(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint64 = {
|
|
.name = "uint64",
|
|
.get = get_uint64,
|
|
.put = put_uint64,
|
|
};
|
|
|
|
/* 8 bit int. See that the received value is the same than the one
|
|
in the field */
|
|
|
|
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t *v = pv;
|
|
uint8_t v2;
|
|
qemu_get_8s(f, &v2);
|
|
|
|
if (*v == v2)
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint8_equal = {
|
|
.name = "int32 equal",
|
|
.get = get_uint8_equal,
|
|
.put = put_uint8,
|
|
};
|
|
|
|
/* timers */
|
|
|
|
static int get_timer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
QEMUTimer *v = pv;
|
|
qemu_get_timer(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_timer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
QEMUTimer *v = pv;
|
|
qemu_put_timer(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_timer = {
|
|
.name = "timer",
|
|
.get = get_timer,
|
|
.put = put_timer,
|
|
};
|
|
|
|
/* uint8_t buffers */
|
|
|
|
static int get_buffer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t *v = pv;
|
|
qemu_get_buffer(f, v, size);
|
|
return 0;
|
|
}
|
|
|
|
static void put_buffer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t *v = pv;
|
|
qemu_put_buffer(f, v, size);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_buffer = {
|
|
.name = "buffer",
|
|
.get = get_buffer,
|
|
.put = put_buffer,
|
|
};
|
|
|
|
typedef struct SaveStateEntry {
|
|
QTAILQ_ENTRY(SaveStateEntry) entry;
|
|
char idstr[256];
|
|
int instance_id;
|
|
int version_id;
|
|
int section_id;
|
|
SaveLiveStateHandler *save_live_state;
|
|
SaveStateHandler *save_state;
|
|
LoadStateHandler *load_state;
|
|
const VMStateDescription *vmsd;
|
|
void *opaque;
|
|
} SaveStateEntry;
|
|
|
|
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
|
QTAILQ_HEAD_INITIALIZER(savevm_handlers);
|
|
static int global_section_id;
|
|
|
|
static int calculate_new_instance_id(const char *idstr)
|
|
{
|
|
SaveStateEntry *se;
|
|
int instance_id = 0;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (strcmp(idstr, se->idstr) == 0
|
|
&& instance_id <= se->instance_id) {
|
|
instance_id = se->instance_id + 1;
|
|
}
|
|
}
|
|
return instance_id;
|
|
}
|
|
|
|
/* TODO: Individual devices generally have very little idea about the rest
|
|
of the system, so instance_id should be removed/replaced.
|
|
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
|
distinguishing id for all instances of your device class. */
|
|
int register_savevm_live(const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveLiveStateHandler *save_live_state,
|
|
SaveStateHandler *save_state,
|
|
LoadStateHandler *load_state,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
se = qemu_malloc(sizeof(SaveStateEntry));
|
|
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
|
se->version_id = version_id;
|
|
se->section_id = global_section_id++;
|
|
se->save_live_state = save_live_state;
|
|
se->save_state = save_state;
|
|
se->load_state = load_state;
|
|
se->opaque = opaque;
|
|
se->vmsd = NULL;
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(idstr);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
int register_savevm(const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveStateHandler *save_state,
|
|
LoadStateHandler *load_state,
|
|
void *opaque)
|
|
{
|
|
return register_savevm_live(idstr, instance_id, version_id,
|
|
NULL, save_state, load_state, opaque);
|
|
}
|
|
|
|
void unregister_savevm(const char *idstr, void *opaque)
|
|
{
|
|
SaveStateEntry *se, *new_se;
|
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
|
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) {
|
|
QTAILQ_REMOVE(&savevm_handlers, se, entry);
|
|
qemu_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
int vmstate_register(int instance_id, const VMStateDescription *vmsd,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
se = qemu_malloc(sizeof(SaveStateEntry));
|
|
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
|
se->version_id = vmsd->version_id;
|
|
se->section_id = global_section_id++;
|
|
se->save_live_state = NULL;
|
|
se->save_state = NULL;
|
|
se->load_state = NULL;
|
|
se->opaque = opaque;
|
|
se->vmsd = vmsd;
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(vmsd->name);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque)
|
|
{
|
|
SaveStateEntry *se, *new_se;
|
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
|
if (se->vmsd == vmsd && se->opaque == opaque) {
|
|
QTAILQ_REMOVE(&savevm_handlers, se, entry);
|
|
qemu_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque, int version_id)
|
|
{
|
|
VMStateField *field = vmsd->fields;
|
|
|
|
if (version_id > vmsd->version_id) {
|
|
return -EINVAL;
|
|
}
|
|
if (version_id < vmsd->minimum_version_id_old) {
|
|
return -EINVAL;
|
|
}
|
|
if (version_id < vmsd->minimum_version_id) {
|
|
return vmsd->load_state_old(f, opaque, version_id);
|
|
}
|
|
if (vmsd->pre_load) {
|
|
int ret = vmsd->pre_load(opaque);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
while(field->name) {
|
|
if (field->version_id <= version_id) {
|
|
void *base_addr = opaque + field->offset;
|
|
int ret, i, n_elems = 1;
|
|
|
|
if (field->flags & VMS_ARRAY) {
|
|
n_elems = field->num;
|
|
} else if (field->flags & VMS_VARRAY) {
|
|
n_elems = *(size_t *)(opaque+field->num_offset);
|
|
}
|
|
if (field->flags & VMS_POINTER) {
|
|
base_addr = *(void **)base_addr;
|
|
}
|
|
for (i = 0; i < n_elems; i++) {
|
|
void *addr = base_addr + field->size * i;
|
|
|
|
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
|
addr = *(void **)addr;
|
|
}
|
|
if (field->flags & VMS_STRUCT) {
|
|
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id);
|
|
} else {
|
|
ret = field->info->get(f, addr, field->size);
|
|
|
|
}
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
field++;
|
|
}
|
|
if (vmsd->post_load) {
|
|
return vmsd->post_load(opaque, version_id);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque)
|
|
{
|
|
VMStateField *field = vmsd->fields;
|
|
|
|
if (vmsd->pre_save) {
|
|
vmsd->pre_save(opaque);
|
|
}
|
|
while(field->name) {
|
|
void *base_addr = opaque + field->offset;
|
|
int i, n_elems = 1;
|
|
|
|
if (field->flags & VMS_ARRAY) {
|
|
n_elems = field->num;
|
|
} else if (field->flags & VMS_VARRAY) {
|
|
n_elems = *(size_t *)(opaque+field->num_offset);
|
|
}
|
|
if (field->flags & VMS_POINTER) {
|
|
base_addr = *(void **)base_addr;
|
|
}
|
|
for (i = 0; i < n_elems; i++) {
|
|
void *addr = base_addr + field->size * i;
|
|
|
|
if (field->flags & VMS_STRUCT) {
|
|
vmstate_save_state(f, field->vmsd, addr);
|
|
} else {
|
|
field->info->put(f, addr, field->size);
|
|
}
|
|
}
|
|
field++;
|
|
}
|
|
if (vmsd->post_save) {
|
|
vmsd->post_save(opaque);
|
|
}
|
|
}
|
|
|
|
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
|
|
{
|
|
if (!se->vmsd) { /* Old style */
|
|
return se->load_state(f, se->opaque, version_id);
|
|
}
|
|
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
|
}
|
|
|
|
static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
|
|
{
|
|
if (!se->vmsd) { /* Old style */
|
|
se->save_state(f, se->opaque);
|
|
return;
|
|
}
|
|
vmstate_save_state(f,se->vmsd, se->opaque);
|
|
}
|
|
|
|
#define QEMU_VM_FILE_MAGIC 0x5145564d
|
|
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
|
|
#define QEMU_VM_FILE_VERSION 0x00000003
|
|
|
|
#define QEMU_VM_EOF 0x00
|
|
#define QEMU_VM_SECTION_START 0x01
|
|
#define QEMU_VM_SECTION_PART 0x02
|
|
#define QEMU_VM_SECTION_END 0x03
|
|
#define QEMU_VM_SECTION_FULL 0x04
|
|
|
|
int qemu_savevm_state_begin(QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
|
|
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
int len;
|
|
|
|
if (se->save_live_state == NULL)
|
|
continue;
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_START);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
/* ID string */
|
|
len = strlen(se->idstr);
|
|
qemu_put_byte(f, len);
|
|
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
|
|
|
|
qemu_put_be32(f, se->instance_id);
|
|
qemu_put_be32(f, se->version_id);
|
|
|
|
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
|
|
}
|
|
|
|
if (qemu_file_has_error(f))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_savevm_state_iterate(QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
int ret = 1;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (se->save_live_state == NULL)
|
|
continue;
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_PART);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
|
|
}
|
|
|
|
if (ret)
|
|
return 1;
|
|
|
|
if (qemu_file_has_error(f))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_savevm_state_complete(QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (se->save_live_state == NULL)
|
|
continue;
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_END);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
|
|
}
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
int len;
|
|
|
|
if (se->save_state == NULL && se->vmsd == NULL)
|
|
continue;
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
/* ID string */
|
|
len = strlen(se->idstr);
|
|
qemu_put_byte(f, len);
|
|
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
|
|
|
|
qemu_put_be32(f, se->instance_id);
|
|
qemu_put_be32(f, se->version_id);
|
|
|
|
vmstate_save(f, se);
|
|
}
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
if (qemu_file_has_error(f))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_savevm_state(QEMUFile *f)
|
|
{
|
|
int saved_vm_running;
|
|
int ret;
|
|
|
|
saved_vm_running = vm_running;
|
|
vm_stop(0);
|
|
|
|
bdrv_flush_all();
|
|
|
|
ret = qemu_savevm_state_begin(f);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
do {
|
|
ret = qemu_savevm_state_iterate(f);
|
|
if (ret < 0)
|
|
goto out;
|
|
} while (ret == 0);
|
|
|
|
ret = qemu_savevm_state_complete(f);
|
|
|
|
out:
|
|
if (qemu_file_has_error(f))
|
|
ret = -EIO;
|
|
|
|
if (!ret && saved_vm_running)
|
|
vm_start();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static SaveStateEntry *find_se(const char *idstr, int instance_id)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!strcmp(se->idstr, idstr) &&
|
|
instance_id == se->instance_id)
|
|
return se;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
typedef struct LoadStateEntry {
|
|
QLIST_ENTRY(LoadStateEntry) entry;
|
|
SaveStateEntry *se;
|
|
int section_id;
|
|
int version_id;
|
|
} LoadStateEntry;
|
|
|
|
int qemu_loadvm_state(QEMUFile *f)
|
|
{
|
|
QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
|
|
QLIST_HEAD_INITIALIZER(loadvm_handlers);
|
|
LoadStateEntry *le, *new_le;
|
|
uint8_t section_type;
|
|
unsigned int v;
|
|
int ret;
|
|
|
|
v = qemu_get_be32(f);
|
|
if (v != QEMU_VM_FILE_MAGIC)
|
|
return -EINVAL;
|
|
|
|
v = qemu_get_be32(f);
|
|
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
|
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
|
return -ENOTSUP;
|
|
}
|
|
if (v != QEMU_VM_FILE_VERSION)
|
|
return -ENOTSUP;
|
|
|
|
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
|
uint32_t instance_id, version_id, section_id;
|
|
SaveStateEntry *se;
|
|
char idstr[257];
|
|
int len;
|
|
|
|
switch (section_type) {
|
|
case QEMU_VM_SECTION_START:
|
|
case QEMU_VM_SECTION_FULL:
|
|
/* Read section start */
|
|
section_id = qemu_get_be32(f);
|
|
len = qemu_get_byte(f);
|
|
qemu_get_buffer(f, (uint8_t *)idstr, len);
|
|
idstr[len] = 0;
|
|
instance_id = qemu_get_be32(f);
|
|
version_id = qemu_get_be32(f);
|
|
|
|
/* Find savevm section */
|
|
se = find_se(idstr, instance_id);
|
|
if (se == NULL) {
|
|
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Validate version */
|
|
if (version_id > se->version_id) {
|
|
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
|
version_id, idstr, se->version_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Add entry */
|
|
le = qemu_mallocz(sizeof(*le));
|
|
|
|
le->se = se;
|
|
le->section_id = section_id;
|
|
le->version_id = version_id;
|
|
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry);
|
|
|
|
ret = vmstate_load(f, le->se, le->version_id);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
|
instance_id, idstr);
|
|
goto out;
|
|
}
|
|
break;
|
|
case QEMU_VM_SECTION_PART:
|
|
case QEMU_VM_SECTION_END:
|
|
section_id = qemu_get_be32(f);
|
|
|
|
QLIST_FOREACH(le, &loadvm_handlers, entry) {
|
|
if (le->section_id == section_id) {
|
|
break;
|
|
}
|
|
}
|
|
if (le == NULL) {
|
|
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = vmstate_load(f, le->se, le->version_id);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
|
section_id);
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
|
|
QLIST_REMOVE(le, entry);
|
|
qemu_free(le);
|
|
}
|
|
|
|
if (qemu_file_has_error(f))
|
|
ret = -EIO;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* device can contain snapshots */
|
|
static int bdrv_can_snapshot(BlockDriverState *bs)
|
|
{
|
|
return (bs &&
|
|
!bdrv_is_removable(bs) &&
|
|
!bdrv_is_read_only(bs));
|
|
}
|
|
|
|
/* device must be snapshots in order to have a reliable snapshot */
|
|
static int bdrv_has_snapshot(BlockDriverState *bs)
|
|
{
|
|
return (bs &&
|
|
!bdrv_is_removable(bs) &&
|
|
!bdrv_is_read_only(bs));
|
|
}
|
|
|
|
static BlockDriverState *get_bs_snapshots(void)
|
|
{
|
|
BlockDriverState *bs;
|
|
DriveInfo *dinfo;
|
|
|
|
if (bs_snapshots)
|
|
return bs_snapshots;
|
|
QTAILQ_FOREACH(dinfo, &drives, next) {
|
|
bs = dinfo->bdrv;
|
|
if (bdrv_can_snapshot(bs))
|
|
goto ok;
|
|
}
|
|
return NULL;
|
|
ok:
|
|
bs_snapshots = bs;
|
|
return bs;
|
|
}
|
|
|
|
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
|
|
const char *name)
|
|
{
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
|
int nb_sns, i, ret;
|
|
|
|
ret = -ENOENT;
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns < 0)
|
|
return ret;
|
|
for(i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
|
*sn_info = *sn;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
qemu_free(sn_tab);
|
|
return ret;
|
|
}
|
|
|
|
void do_savevm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
DriveInfo *dinfo;
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
|
|
int must_delete, ret;
|
|
QEMUFile *f;
|
|
int saved_vm_running;
|
|
uint32_t vm_state_size;
|
|
#ifdef _WIN32
|
|
struct _timeb tb;
|
|
#else
|
|
struct timeval tv;
|
|
#endif
|
|
const char *name = qdict_get_try_str(qdict, "name");
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No block device can accept snapshots\n");
|
|
return;
|
|
}
|
|
|
|
/* ??? Should this occur after vm_stop? */
|
|
qemu_aio_flush();
|
|
|
|
saved_vm_running = vm_running;
|
|
vm_stop(0);
|
|
|
|
must_delete = 0;
|
|
if (name) {
|
|
ret = bdrv_snapshot_find(bs, old_sn, name);
|
|
if (ret >= 0) {
|
|
must_delete = 1;
|
|
}
|
|
}
|
|
memset(sn, 0, sizeof(*sn));
|
|
if (must_delete) {
|
|
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
|
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
|
} else {
|
|
if (name)
|
|
pstrcpy(sn->name, sizeof(sn->name), name);
|
|
}
|
|
|
|
/* fill auxiliary fields */
|
|
#ifdef _WIN32
|
|
_ftime(&tb);
|
|
sn->date_sec = tb.time;
|
|
sn->date_nsec = tb.millitm * 1000000;
|
|
#else
|
|
gettimeofday(&tv, NULL);
|
|
sn->date_sec = tv.tv_sec;
|
|
sn->date_nsec = tv.tv_usec * 1000;
|
|
#endif
|
|
sn->vm_clock_nsec = qemu_get_clock(vm_clock);
|
|
|
|
/* save the VM state */
|
|
f = qemu_fopen_bdrv(bs, 1);
|
|
if (!f) {
|
|
monitor_printf(mon, "Could not open VM state file\n");
|
|
goto the_end;
|
|
}
|
|
ret = qemu_savevm_state(f);
|
|
vm_state_size = qemu_ftell(f);
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
|
goto the_end;
|
|
}
|
|
|
|
/* create the snapshots */
|
|
|
|
QTAILQ_FOREACH(dinfo, &drives, next) {
|
|
bs1 = dinfo->bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
if (must_delete) {
|
|
ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
|
|
if (ret < 0) {
|
|
monitor_printf(mon,
|
|
"Error while deleting snapshot on '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
/* Write VM state size only to the image that contains the state */
|
|
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
|
ret = bdrv_snapshot_create(bs1, sn);
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
}
|
|
|
|
the_end:
|
|
if (saved_vm_running)
|
|
vm_start();
|
|
}
|
|
|
|
int load_vmstate(Monitor *mon, const char *name)
|
|
{
|
|
DriveInfo *dinfo;
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo sn;
|
|
QEMUFile *f;
|
|
int ret;
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No block device supports snapshots\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Flush all IO requests so they don't interfere with the new state. */
|
|
qemu_aio_flush();
|
|
|
|
QTAILQ_FOREACH(dinfo, &drives, next) {
|
|
bs1 = dinfo->bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
ret = bdrv_snapshot_goto(bs1, name);
|
|
if (ret < 0) {
|
|
if (bs != bs1)
|
|
monitor_printf(mon, "Warning: ");
|
|
switch(ret) {
|
|
case -ENOTSUP:
|
|
monitor_printf(mon,
|
|
"Snapshots not supported on device '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
break;
|
|
case -ENOENT:
|
|
monitor_printf(mon, "Could not find snapshot '%s' on "
|
|
"device '%s'\n",
|
|
name, bdrv_get_device_name(bs1));
|
|
break;
|
|
default:
|
|
monitor_printf(mon, "Error %d while activating snapshot on"
|
|
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
|
break;
|
|
}
|
|
/* fatal on snapshot block device */
|
|
if (bs == bs1)
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Don't even try to load empty VM states */
|
|
ret = bdrv_snapshot_find(bs, &sn, name);
|
|
if ((ret >= 0) && (sn.vm_state_size == 0))
|
|
return -EINVAL;
|
|
|
|
/* restore the VM state */
|
|
f = qemu_fopen_bdrv(bs, 0);
|
|
if (!f) {
|
|
monitor_printf(mon, "Could not open VM state file\n");
|
|
return -EINVAL;
|
|
}
|
|
ret = qemu_loadvm_state(f);
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void do_delvm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
DriveInfo *dinfo;
|
|
BlockDriverState *bs, *bs1;
|
|
int ret;
|
|
const char *name = qdict_get_str(qdict, "name");
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
QTAILQ_FOREACH(dinfo, &drives, next) {
|
|
bs1 = dinfo->bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
ret = bdrv_snapshot_delete(bs1, name);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP)
|
|
monitor_printf(mon,
|
|
"Snapshots not supported on device '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
else
|
|
monitor_printf(mon, "Error %d while deleting snapshot on "
|
|
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void do_info_snapshots(Monitor *mon)
|
|
{
|
|
DriveInfo *dinfo;
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
|
int nb_sns, i;
|
|
char buf[256];
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No available block device supports snapshots\n");
|
|
return;
|
|
}
|
|
monitor_printf(mon, "Snapshot devices:");
|
|
QTAILQ_FOREACH(dinfo, &drives, next) {
|
|
bs1 = dinfo->bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
if (bs == bs1)
|
|
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
monitor_printf(mon, "\n");
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns < 0) {
|
|
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
|
return;
|
|
}
|
|
monitor_printf(mon, "Snapshot list (from %s):\n",
|
|
bdrv_get_device_name(bs));
|
|
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
|
|
for(i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
|
|
}
|
|
qemu_free(sn_tab);
|
|
}
|