1255 lines
31 KiB
C
1255 lines
31 KiB
C
/*
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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 "qemu-common.h"
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#include "hw/hw.h"
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#include "net.h"
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#include "console.h"
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#include "sysemu.h"
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#include "qemu-timer.h"
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#include "qemu-char.h"
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#include "block.h"
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#include "audio/audio.h"
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#include "migration.h"
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#include "qemu_socket.h"
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/time.h>
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#include <zlib.h>
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#ifndef _WIN32
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#include <sys/times.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#if defined(__NetBSD__)
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#include <net/if_tap.h>
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#endif
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#ifdef __linux__
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#include <linux/if_tun.h>
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#endif
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#include <arpa/inet.h>
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#include <dirent.h>
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#include <netdb.h>
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#include <sys/select.h>
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#ifdef _BSD
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#include <sys/stat.h>
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#ifdef __FreeBSD__
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#include <libutil.h>
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#else
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#include <util.h>
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#endif
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#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
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#include <freebsd/stdlib.h>
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#else
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#ifdef __linux__
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#include <pty.h>
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#include <malloc.h>
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#include <linux/rtc.h>
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#endif
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#endif
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#endif
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#ifdef _WIN32
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#include <malloc.h>
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#include <sys/timeb.h>
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#include <mmsystem.h>
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#define getopt_long_only getopt_long
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#define memalign(align, size) malloc(size)
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#endif
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/* point to the block driver where the snapshots are managed */
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static BlockDriverState *bs_snapshots;
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#define SELF_ANNOUNCE_ROUNDS 5
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#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
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//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
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#define EXPERIMENTAL_MAGIC 0xf1f23f4f
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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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uint32_t magic = EXPERIMENTAL_MAGIC;
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uint16_t proto = htons(ETH_P_EXPERIMENTAL);
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/* FIXME: should we send a different packet (arp/rarp/ping)? */
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memset(buf, 0xff, 6); /* h_dst */
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memcpy(buf + 6, mac_addr, 6); /* h_src */
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memcpy(buf + 12, &proto, 2); /* h_proto */
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memcpy(buf + 14, &magic, 4); /* magic */
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return 18; /* len */
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}
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void qemu_announce_self(void)
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{
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int i, j, len;
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VLANState *vlan;
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VLANClientState *vc;
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uint8_t buf[256];
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for (i = 0; i < nb_nics; i++) {
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len = announce_self_create(buf, nd_table[i].macaddr);
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vlan = nd_table[i].vlan;
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for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
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for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
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vc->fd_read(vc->opaque, buf, len);
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}
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}
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}
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/***********************************************************/
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/* savevm/loadvm support */
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#define IO_BUF_SIZE 32768
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struct QEMUFile {
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QEMUFilePutBufferFunc *put_buffer;
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QEMUFileGetBufferFunc *get_buffer;
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QEMUFileCloseFunc *close;
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QEMUFileRateLimit *rate_limit;
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void *opaque;
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int is_write;
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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];
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int has_error;
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};
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typedef struct QEMUFilePopen
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{
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FILE *popen_file;
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QEMUFile *file;
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} QEMUFilePopen;
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typedef struct QEMUFileSocket
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{
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int fd;
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QEMUFile *file;
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} QEMUFileSocket;
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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;
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do {
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len = recv(s->fd, buf, size, 0);
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} while (len == -1 && socket_error() == EINTR);
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if (len == -1)
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len = -socket_error();
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return len;
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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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qemu_free(s);
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return 0;
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}
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static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
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{
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QEMUFilePopen *s = opaque;
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return fwrite(buf, 1, size, s->popen_file);
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}
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static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
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{
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QEMUFilePopen *s = opaque;
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return fread(buf, 1, size, s->popen_file);
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}
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static int popen_close(void *opaque)
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{
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QEMUFilePopen *s = opaque;
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pclose(s->popen_file);
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qemu_free(s);
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return 0;
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}
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QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
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{
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QEMUFilePopen *s;
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if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
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fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL;
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}
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s = qemu_mallocz(sizeof(QEMUFilePopen));
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if (!s) {
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fprintf(stderr, "qemu_popen: malloc failed\n");
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return NULL;
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}
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s->popen_file = popen_file;
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if(mode[0] == 'r') {
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s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
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} else {
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s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
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}
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fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
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return s->file;
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}
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
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{
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FILE *popen_file;
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popen_file = popen(command, mode);
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if(popen_file == NULL) {
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return NULL;
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}
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return qemu_popen(popen_file, mode);
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}
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QEMUFile *qemu_fopen_socket(int fd)
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{
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QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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if (s == NULL)
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return NULL;
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s->fd = fd;
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s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
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return s->file;
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}
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typedef struct QEMUFileStdio
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{
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FILE *outfile;
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} QEMUFileStdio;
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static int file_put_buffer(void *opaque, const uint8_t *buf,
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int64_t pos, int size)
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{
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QEMUFileStdio *s = opaque;
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fseek(s->outfile, pos, SEEK_SET);
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fwrite(buf, 1, size, s->outfile);
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return size;
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}
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static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
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{
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QEMUFileStdio *s = opaque;
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fseek(s->outfile, pos, SEEK_SET);
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return fread(buf, 1, size, s->outfile);
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}
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static int file_close(void *opaque)
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{
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QEMUFileStdio *s = opaque;
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fclose(s->outfile);
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qemu_free(s);
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return 0;
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}
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QEMUFile *qemu_fopen(const char *filename, const char *mode)
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{
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QEMUFileStdio *s;
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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if (!s)
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return NULL;
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s->outfile = fopen(filename, mode);
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if (!s->outfile)
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goto fail;
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if (!strcmp(mode, "wb"))
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return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
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else if (!strcmp(mode, "rb"))
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return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
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fail:
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if (s->outfile)
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fclose(s->outfile);
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qemu_free(s);
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return NULL;
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}
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typedef struct QEMUFileBdrv
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{
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BlockDriverState *bs;
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int64_t base_offset;
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} QEMUFileBdrv;
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static int bdrv_put_buffer(void *opaque, const uint8_t *buf,
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int64_t pos, int size)
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{
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QEMUFileBdrv *s = opaque;
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bdrv_pwrite(s->bs, s->base_offset + pos, buf, size);
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return size;
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}
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static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
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{
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QEMUFileBdrv *s = opaque;
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return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
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}
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static int bdrv_fclose(void *opaque)
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{
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QEMUFileBdrv *s = opaque;
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qemu_free(s);
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return 0;
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}
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static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
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{
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QEMUFileBdrv *s;
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s = qemu_mallocz(sizeof(QEMUFileBdrv));
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if (!s)
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return NULL;
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s->bs = bs;
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s->base_offset = offset;
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if (is_writable)
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return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL);
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return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL);
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}
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QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
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QEMUFileGetBufferFunc *get_buffer,
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QEMUFileCloseFunc *close,
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QEMUFileRateLimit *rate_limit)
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{
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QEMUFile *f;
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f = qemu_mallocz(sizeof(QEMUFile));
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if (!f)
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return NULL;
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f->opaque = opaque;
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f->put_buffer = put_buffer;
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f->get_buffer = get_buffer;
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f->close = close;
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f->rate_limit = rate_limit;
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f->is_write = 0;
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return f;
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}
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int qemu_file_has_error(QEMUFile *f)
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{
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return f->has_error;
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}
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void qemu_fflush(QEMUFile *f)
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{
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if (!f->put_buffer)
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return;
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if (f->is_write && f->buf_index > 0) {
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int len;
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len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
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if (len > 0)
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f->buf_offset += f->buf_index;
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else
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f->has_error = 1;
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f->buf_index = 0;
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}
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}
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static void qemu_fill_buffer(QEMUFile *f)
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{
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int len;
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if (!f->get_buffer)
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return;
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if (f->is_write)
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abort();
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len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
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if (len > 0) {
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f->buf_index = 0;
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f->buf_size = len;
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f->buf_offset += len;
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} else if (len != -EAGAIN)
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f->has_error = 1;
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}
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int qemu_fclose(QEMUFile *f)
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{
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int ret = 0;
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qemu_fflush(f);
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if (f->close)
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ret = f->close(f->opaque);
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qemu_free(f);
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return ret;
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}
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void qemu_file_put_notify(QEMUFile *f)
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{
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f->put_buffer(f->opaque, NULL, 0, 0);
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}
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void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
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{
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int l;
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if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
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fprintf(stderr,
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"Attempted to write to buffer while read buffer is not empty\n");
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abort();
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}
|
|
|
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while (!f->has_error && size > 0) {
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l = IO_BUF_SIZE - f->buf_index;
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if (l > size)
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l = size;
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memcpy(f->buf + f->buf_index, buf, l);
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f->is_write = 1;
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f->buf_index += l;
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buf += l;
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size -= l;
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if (f->buf_index >= IO_BUF_SIZE)
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qemu_fflush(f);
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}
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}
|
|
|
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void qemu_put_byte(QEMUFile *f, int v)
|
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{
|
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if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
|
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fprintf(stderr,
|
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"Attempted to write to buffer while read buffer is not empty\n");
|
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abort();
|
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}
|
|
|
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f->buf[f->buf_index++] = v;
|
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f->is_write = 1;
|
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if (f->buf_index >= IO_BUF_SIZE)
|
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qemu_fflush(f);
|
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}
|
|
|
|
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
|
|
{
|
|
int size, l;
|
|
|
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if (f->is_write)
|
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abort();
|
|
|
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size = size1;
|
|
while (size > 0) {
|
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l = f->buf_size - f->buf_index;
|
|
if (l == 0) {
|
|
qemu_fill_buffer(f);
|
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l = f->buf_size - f->buf_index;
|
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if (l == 0)
|
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break;
|
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}
|
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if (l > size)
|
|
l = size;
|
|
memcpy(buf, f->buf + f->buf_index, l);
|
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f->buf_index += l;
|
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buf += l;
|
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size -= l;
|
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}
|
|
return size1 - size;
|
|
}
|
|
|
|
int qemu_get_byte(QEMUFile *f)
|
|
{
|
|
if (f->is_write)
|
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abort();
|
|
|
|
if (f->buf_index >= f->buf_size) {
|
|
qemu_fill_buffer(f);
|
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if (f->buf_index >= f->buf_size)
|
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return 0;
|
|
}
|
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return f->buf[f->buf_index++];
|
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}
|
|
|
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int64_t qemu_ftell(QEMUFile *f)
|
|
{
|
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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;
|
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}
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
typedef struct SaveStateEntry {
|
|
char idstr[256];
|
|
int instance_id;
|
|
int version_id;
|
|
int section_id;
|
|
SaveLiveStateHandler *save_live_state;
|
|
SaveStateHandler *save_state;
|
|
LoadStateHandler *load_state;
|
|
void *opaque;
|
|
struct SaveStateEntry *next;
|
|
} SaveStateEntry;
|
|
|
|
static SaveStateEntry *first_se;
|
|
|
|
/* 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, **pse;
|
|
static int global_section_id;
|
|
|
|
se = qemu_malloc(sizeof(SaveStateEntry));
|
|
if (!se)
|
|
return -1;
|
|
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
|
se->instance_id = (instance_id == -1) ? 0 : instance_id;
|
|
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->next = NULL;
|
|
|
|
/* add at the end of list */
|
|
pse = &first_se;
|
|
while (*pse != NULL) {
|
|
if (instance_id == -1
|
|
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
|
&& se->instance_id <= (*pse)->instance_id)
|
|
se->instance_id = (*pse)->instance_id + 1;
|
|
pse = &(*pse)->next;
|
|
}
|
|
*pse = se;
|
|
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);
|
|
}
|
|
|
|
#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);
|
|
|
|
for (se = first_se; se != NULL; se = se->next) {
|
|
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;
|
|
|
|
for (se = first_se; se != NULL; se = se->next) {
|
|
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;
|
|
|
|
for (se = first_se; se != NULL; se = se->next) {
|
|
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);
|
|
}
|
|
|
|
for(se = first_se; se != NULL; se = se->next) {
|
|
int len;
|
|
|
|
if (se->save_state == 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);
|
|
|
|
se->save_state(f, se->opaque);
|
|
}
|
|
|
|
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;
|
|
|
|
for(se = first_se; se != NULL; se = se->next) {
|
|
if (!strcmp(se->idstr, idstr) &&
|
|
instance_id == se->instance_id)
|
|
return se;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
typedef struct LoadStateEntry {
|
|
SaveStateEntry *se;
|
|
int section_id;
|
|
int version_id;
|
|
struct LoadStateEntry *next;
|
|
} LoadStateEntry;
|
|
|
|
static int qemu_loadvm_state_v2(QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
int len, ret, instance_id, record_len, version_id;
|
|
int64_t total_len, end_pos, cur_pos;
|
|
char idstr[256];
|
|
|
|
total_len = qemu_get_be64(f);
|
|
end_pos = total_len + qemu_ftell(f);
|
|
for(;;) {
|
|
if (qemu_ftell(f) >= end_pos)
|
|
break;
|
|
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);
|
|
record_len = qemu_get_be32(f);
|
|
cur_pos = qemu_ftell(f);
|
|
se = find_se(idstr, instance_id);
|
|
if (!se) {
|
|
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
|
instance_id, idstr);
|
|
} else {
|
|
ret = se->load_state(f, se->opaque, version_id);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
|
instance_id, idstr);
|
|
}
|
|
}
|
|
/* always seek to exact end of record */
|
|
qemu_fseek(f, cur_pos + record_len, SEEK_SET);
|
|
}
|
|
|
|
if (qemu_file_has_error(f))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_loadvm_state(QEMUFile *f)
|
|
{
|
|
LoadStateEntry *first_le = NULL;
|
|
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)
|
|
return qemu_loadvm_state_v2(f);
|
|
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;
|
|
LoadStateEntry *le;
|
|
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));
|
|
if (le == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
le->se = se;
|
|
le->section_id = section_id;
|
|
le->version_id = version_id;
|
|
le->next = first_le;
|
|
first_le = le;
|
|
|
|
le->se->load_state(f, le->se->opaque, le->version_id);
|
|
break;
|
|
case QEMU_VM_SECTION_PART:
|
|
case QEMU_VM_SECTION_END:
|
|
section_id = qemu_get_be32(f);
|
|
|
|
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
|
if (le == NULL) {
|
|
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
le->se->load_state(f, le->se->opaque, le->version_id);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
while (first_le) {
|
|
LoadStateEntry *le = first_le;
|
|
first_le = first_le->next;
|
|
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;
|
|
int i;
|
|
|
|
if (bs_snapshots)
|
|
return bs_snapshots;
|
|
for(i = 0; i <= nb_drives; i++) {
|
|
bs = drives_table[i].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(const char *name)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
|
|
int must_delete, ret, i;
|
|
BlockDriverInfo bdi1, *bdi = &bdi1;
|
|
QEMUFile *f;
|
|
int saved_vm_running;
|
|
uint32_t vm_state_size;
|
|
#ifdef _WIN32
|
|
struct _timeb tb;
|
|
#else
|
|
struct timeval tv;
|
|
#endif
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
term_printf("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);
|
|
|
|
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
|
|
term_printf("Device %s does not support VM state snapshots\n",
|
|
bdrv_get_device_name(bs));
|
|
goto the_end;
|
|
}
|
|
|
|
/* save the VM state */
|
|
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
|
if (!f) {
|
|
term_printf("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) {
|
|
term_printf("Error %d while writing VM\n", ret);
|
|
goto the_end;
|
|
}
|
|
|
|
/* create the snapshots */
|
|
|
|
for(i = 0; i < nb_drives; i++) {
|
|
bs1 = drives_table[i].bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
if (must_delete) {
|
|
ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
|
|
if (ret < 0) {
|
|
term_printf("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) {
|
|
term_printf("Error while creating snapshot on '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
}
|
|
|
|
the_end:
|
|
if (saved_vm_running)
|
|
vm_start();
|
|
}
|
|
|
|
void do_loadvm(const char *name)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
BlockDriverInfo bdi1, *bdi = &bdi1;
|
|
QEMUSnapshotInfo sn;
|
|
QEMUFile *f;
|
|
int i, ret;
|
|
int saved_vm_running;
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
term_printf("No block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
/* Flush all IO requests so they don't interfere with the new state. */
|
|
qemu_aio_flush();
|
|
|
|
saved_vm_running = vm_running;
|
|
vm_stop(0);
|
|
|
|
for(i = 0; i <= nb_drives; i++) {
|
|
bs1 = drives_table[i].bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
ret = bdrv_snapshot_goto(bs1, name);
|
|
if (ret < 0) {
|
|
if (bs != bs1)
|
|
term_printf("Warning: ");
|
|
switch(ret) {
|
|
case -ENOTSUP:
|
|
term_printf("Snapshots not supported on device '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
break;
|
|
case -ENOENT:
|
|
term_printf("Could not find snapshot '%s' on device '%s'\n",
|
|
name, bdrv_get_device_name(bs1));
|
|
break;
|
|
default:
|
|
term_printf("Error %d while activating snapshot on '%s'\n",
|
|
ret, bdrv_get_device_name(bs1));
|
|
break;
|
|
}
|
|
/* fatal on snapshot block device */
|
|
if (bs == bs1)
|
|
goto the_end;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
|
|
term_printf("Device %s does not support VM state snapshots\n",
|
|
bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
|
|
/* Don't even try to load empty VM states */
|
|
ret = bdrv_snapshot_find(bs, &sn, name);
|
|
if ((ret >= 0) && (sn.vm_state_size == 0))
|
|
goto the_end;
|
|
|
|
/* restore the VM state */
|
|
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
|
if (!f) {
|
|
term_printf("Could not open VM state file\n");
|
|
goto the_end;
|
|
}
|
|
ret = qemu_loadvm_state(f);
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
term_printf("Error %d while loading VM state\n", ret);
|
|
}
|
|
the_end:
|
|
if (saved_vm_running)
|
|
vm_start();
|
|
}
|
|
|
|
void do_delvm(const char *name)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
int i, ret;
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
term_printf("No block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
for(i = 0; i <= nb_drives; i++) {
|
|
bs1 = drives_table[i].bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
ret = bdrv_snapshot_delete(bs1, name);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP)
|
|
term_printf("Snapshots not supported on device '%s'\n",
|
|
bdrv_get_device_name(bs1));
|
|
else
|
|
term_printf("Error %d while deleting snapshot on '%s'\n",
|
|
ret, bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void do_info_snapshots(void)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
|
int nb_sns, i;
|
|
char buf[256];
|
|
|
|
bs = get_bs_snapshots();
|
|
if (!bs) {
|
|
term_printf("No available block device supports snapshots\n");
|
|
return;
|
|
}
|
|
term_printf("Snapshot devices:");
|
|
for(i = 0; i <= nb_drives; i++) {
|
|
bs1 = drives_table[i].bdrv;
|
|
if (bdrv_has_snapshot(bs1)) {
|
|
if (bs == bs1)
|
|
term_printf(" %s", bdrv_get_device_name(bs1));
|
|
}
|
|
}
|
|
term_printf("\n");
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns < 0) {
|
|
term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
|
|
return;
|
|
}
|
|
term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
|
|
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
|
|
for(i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
|
|
}
|
|
qemu_free(sn_tab);
|
|
}
|