2135 lines
53 KiB
C
2135 lines
53 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 <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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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.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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#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 CONFIG_BSD
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#include <sys/stat.h>
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
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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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#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 <windows.h>
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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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#include "qemu-common.h"
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#include "hw/hw.h"
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#include "hw/qdev.h"
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#include "net.h"
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#include "monitor.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 "blockdev.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 "qemu-queue.h"
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#define SELF_ANNOUNCE_ROUNDS 5
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#ifndef ETH_P_RARP
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#define ETH_P_RARP 0x8035
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#endif
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#define ARP_HTYPE_ETH 0x0001
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#define ARP_PTYPE_IP 0x0800
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#define ARP_OP_REQUEST_REV 0x3
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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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/* 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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/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
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memset(buf + 42, 0x00, 18);
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return 60; /* len (FCS will be added by hardware) */
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}
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static void qemu_announce_self_iter(NICState *nic, void *opaque)
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{
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uint8_t buf[60];
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int len;
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len = announce_self_create(buf, nic->conf->macaddr.a);
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qemu_send_packet_raw(&nic->nc, buf, len);
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}
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static void qemu_announce_self_once(void *opaque)
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{
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static int count = SELF_ANNOUNCE_ROUNDS;
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QEMUTimer *timer = *(QEMUTimer **)opaque;
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qemu_foreach_nic(qemu_announce_self_iter, NULL);
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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(rt_clock) +
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50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
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} else {
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qemu_del_timer(timer);
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qemu_free_timer(timer);
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}
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}
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void qemu_announce_self(void)
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{
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static QEMUTimer *timer;
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timer = qemu_new_timer(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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/* 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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QEMUFileSetRateLimit *set_rate_limit;
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QEMUFileGetRateLimit *get_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 QEMUFileStdio
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{
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FILE *stdio_file;
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QEMUFile *file;
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} QEMUFileStdio;
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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, (void *)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 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;
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return fwrite(buf, 1, size, s->stdio_file);
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}
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static int stdio_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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FILE *fp = s->stdio_file;
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int bytes;
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do {
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clearerr(fp);
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bytes = fread(buf, 1, size, fp);
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR));
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return bytes;
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}
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static int stdio_pclose(void *opaque)
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{
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QEMUFileStdio *s = opaque;
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int ret;
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ret = pclose(s->stdio_file);
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qemu_free(s);
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return ret;
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}
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static int stdio_fclose(void *opaque)
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{
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QEMUFileStdio *s = opaque;
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fclose(s->stdio_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 *stdio_file, const char *mode)
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{
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QEMUFileStdio *s;
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if (stdio_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(QEMUFileStdio));
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s->stdio_file = stdio_file;
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if(mode[0] == 'r') {
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s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
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NULL, NULL, NULL);
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} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
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NULL, NULL, NULL);
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}
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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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int qemu_stdio_fd(QEMUFile *f)
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{
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QEMUFileStdio *p;
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int fd;
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p = (QEMUFileStdio *)f->opaque;
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fd = fileno(p->stdio_file);
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return fd;
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}
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QEMUFile *qemu_fdopen(int fd, const char *mode)
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{
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QEMUFileStdio *s;
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if (mode == NULL ||
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(mode[0] != 'r' && mode[0] != 'w') ||
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mode[1] != 'b' || mode[2] != 0) {
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fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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return NULL;
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}
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = fdopen(fd, mode);
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if (!s->stdio_file)
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goto fail;
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if(mode[0] == 'r') {
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s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
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NULL, NULL, NULL);
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} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
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NULL, NULL, NULL);
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}
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return s->file;
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fail:
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qemu_free(s);
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return NULL;
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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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s->fd = fd;
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s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
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NULL, NULL, NULL);
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return s->file;
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}
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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->stdio_file, pos, SEEK_SET);
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return fwrite(buf, 1, size, s->stdio_file);
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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->stdio_file, pos, SEEK_SET);
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return fread(buf, 1, size, s->stdio_file);
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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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if (mode == NULL ||
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(mode[0] != 'r' && mode[0] != 'w') ||
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mode[1] != 'b' || mode[2] != 0) {
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fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
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return NULL;
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}
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = fopen(filename, mode);
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if (!s->stdio_file)
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goto fail;
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if(mode[0] == 'w') {
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s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
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NULL, NULL, NULL);
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} else {
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s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
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NULL, NULL, NULL);
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}
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return s->file;
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fail:
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qemu_free(s);
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return NULL;
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}
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static int block_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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bdrv_save_vmstate(opaque, buf, pos, size);
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return size;
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}
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static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
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{
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return bdrv_load_vmstate(opaque, buf, pos, size);
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}
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static int bdrv_fclose(void *opaque)
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{
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return 0;
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}
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static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
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{
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if (is_writable)
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return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
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NULL, NULL, NULL);
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return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, 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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QEMUFileSetRateLimit *set_rate_limit,
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QEMUFileGetRateLimit *get_rate_limit)
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{
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QEMUFile *f;
|
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|
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f = qemu_mallocz(sizeof(QEMUFile));
|
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|
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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->set_rate_limit = set_rate_limit;
|
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f->get_rate_limit = get_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_file_set_error(QEMUFile *f)
|
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{
|
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f->has_error = 1;
|
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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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}
|
|
}
|
|
|
|
static void qemu_fill_buffer(QEMUFile *f)
|
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{
|
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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;
|
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} 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;
|
|
|
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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;
|
|
}
|
|
|
|
static int qemu_peek_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];
|
|
}
|
|
|
|
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_get_rate_limit(QEMUFile *f)
|
|
{
|
|
if (f->get_rate_limit)
|
|
return f->get_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;
|
|
}
|
|
|
|
/* bool */
|
|
|
|
static int get_bool(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
bool *v = pv;
|
|
*v = qemu_get_byte(f);
|
|
return 0;
|
|
}
|
|
|
|
static void put_bool(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
bool *v = pv;
|
|
qemu_put_byte(f, *v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_bool = {
|
|
.name = "bool",
|
|
.get = get_bool,
|
|
.put = put_bool,
|
|
};
|
|
|
|
/* 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 = "uint8 equal",
|
|
.get = get_uint8_equal,
|
|
.put = put_uint8,
|
|
};
|
|
|
|
/* 16 bit unsigned int int. See that the received value is the same than the one
|
|
in the field */
|
|
|
|
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint16_t *v = pv;
|
|
uint16_t v2;
|
|
qemu_get_be16s(f, &v2);
|
|
|
|
if (*v == v2)
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_uint16_equal = {
|
|
.name = "uint16 equal",
|
|
.get = get_uint16_equal,
|
|
.put = put_uint16,
|
|
};
|
|
|
|
/* 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,
|
|
};
|
|
|
|
/* unused buffers: space that was used for some fields that are
|
|
not usefull anymore */
|
|
|
|
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
uint8_t buf[1024];
|
|
int block_len;
|
|
|
|
while (size > 0) {
|
|
block_len = MIN(sizeof(buf), size);
|
|
size -= block_len;
|
|
qemu_get_buffer(f, buf, block_len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
static const uint8_t buf[1024];
|
|
int block_len;
|
|
|
|
while (size > 0) {
|
|
block_len = MIN(sizeof(buf), size);
|
|
size -= block_len;
|
|
qemu_put_buffer(f, buf, block_len);
|
|
}
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_unused_buffer = {
|
|
.name = "unused_buffer",
|
|
.get = get_unused_buffer,
|
|
.put = put_unused_buffer,
|
|
};
|
|
|
|
typedef struct CompatEntry {
|
|
char idstr[256];
|
|
int instance_id;
|
|
} CompatEntry;
|
|
|
|
typedef struct SaveStateEntry {
|
|
QTAILQ_ENTRY(SaveStateEntry) entry;
|
|
char idstr[256];
|
|
int instance_id;
|
|
int alias_id;
|
|
int version_id;
|
|
int section_id;
|
|
SaveSetParamsHandler *set_params;
|
|
SaveLiveStateHandler *save_live_state;
|
|
SaveStateHandler *save_state;
|
|
LoadStateHandler *load_state;
|
|
const VMStateDescription *vmsd;
|
|
void *opaque;
|
|
CompatEntry *compat;
|
|
int no_migrate;
|
|
} 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;
|
|
}
|
|
|
|
static int calculate_compat_instance_id(const char *idstr)
|
|
{
|
|
SaveStateEntry *se;
|
|
int instance_id = 0;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->compat)
|
|
continue;
|
|
|
|
if (strcmp(idstr, se->compat->idstr) == 0
|
|
&& instance_id <= se->compat->instance_id) {
|
|
instance_id = se->compat->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(DeviceState *dev,
|
|
const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveSetParamsHandler *set_params,
|
|
SaveLiveStateHandler *save_live_state,
|
|
SaveStateHandler *save_state,
|
|
LoadStateHandler *load_state,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
se = qemu_mallocz(sizeof(SaveStateEntry));
|
|
se->version_id = version_id;
|
|
se->section_id = global_section_id++;
|
|
se->set_params = set_params;
|
|
se->save_live_state = save_live_state;
|
|
se->save_state = save_state;
|
|
se->load_state = load_state;
|
|
se->opaque = opaque;
|
|
se->vmsd = NULL;
|
|
se->no_migrate = 0;
|
|
|
|
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
|
char *id = dev->parent_bus->info->get_dev_path(dev);
|
|
if (id) {
|
|
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
|
pstrcat(se->idstr, sizeof(se->idstr), "/");
|
|
qemu_free(id);
|
|
|
|
se->compat = qemu_mallocz(sizeof(CompatEntry));
|
|
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
|
se->compat->instance_id = instance_id == -1 ?
|
|
calculate_compat_instance_id(idstr) : instance_id;
|
|
instance_id = -1;
|
|
}
|
|
}
|
|
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
assert(!se->compat || se->instance_id == 0);
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
int register_savevm(DeviceState *dev,
|
|
const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveStateHandler *save_state,
|
|
LoadStateHandler *load_state,
|
|
void *opaque)
|
|
{
|
|
return register_savevm_live(dev, idstr, instance_id, version_id,
|
|
NULL, NULL, save_state, load_state, opaque);
|
|
}
|
|
|
|
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
|
|
{
|
|
SaveStateEntry *se, *new_se;
|
|
char id[256] = "";
|
|
|
|
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
|
char *path = dev->parent_bus->info->get_dev_path(dev);
|
|
if (path) {
|
|
pstrcpy(id, sizeof(id), path);
|
|
pstrcat(id, sizeof(id), "/");
|
|
qemu_free(path);
|
|
}
|
|
}
|
|
pstrcat(id, sizeof(id), idstr);
|
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
|
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
|
|
QTAILQ_REMOVE(&savevm_handlers, se, entry);
|
|
if (se->compat) {
|
|
qemu_free(se->compat);
|
|
}
|
|
qemu_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* mark a device as not to be migrated, that is the device should be
|
|
unplugged before migration */
|
|
void register_device_unmigratable(DeviceState *dev, const char *idstr,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se;
|
|
char id[256] = "";
|
|
|
|
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
|
char *path = dev->parent_bus->info->get_dev_path(dev);
|
|
if (path) {
|
|
pstrcpy(id, sizeof(id), path);
|
|
pstrcat(id, sizeof(id), "/");
|
|
qemu_free(path);
|
|
}
|
|
}
|
|
pstrcat(id, sizeof(id), idstr);
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
|
|
se->no_migrate = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
|
|
const VMStateDescription *vmsd,
|
|
void *opaque, int alias_id,
|
|
int required_for_version)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
/* If this triggers, alias support can be dropped for the vmsd. */
|
|
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
|
|
|
se = qemu_mallocz(sizeof(SaveStateEntry));
|
|
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;
|
|
se->alias_id = alias_id;
|
|
|
|
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
|
char *id = dev->parent_bus->info->get_dev_path(dev);
|
|
if (id) {
|
|
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
|
pstrcat(se->idstr, sizeof(se->idstr), "/");
|
|
qemu_free(id);
|
|
|
|
se->compat = qemu_mallocz(sizeof(CompatEntry));
|
|
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
|
se->compat->instance_id = instance_id == -1 ?
|
|
calculate_compat_instance_id(vmsd->name) : instance_id;
|
|
instance_id = -1;
|
|
}
|
|
}
|
|
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
assert(!se->compat || se->instance_id == 0);
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
int vmstate_register(DeviceState *dev, int instance_id,
|
|
const VMStateDescription *vmsd, void *opaque)
|
|
{
|
|
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
|
|
opaque, -1, 0);
|
|
}
|
|
|
|
void vmstate_unregister(DeviceState *dev, 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);
|
|
if (se->compat) {
|
|
qemu_free(se->compat);
|
|
}
|
|
qemu_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque);
|
|
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque);
|
|
|
|
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque, int version_id)
|
|
{
|
|
VMStateField *field = vmsd->fields;
|
|
int ret;
|
|
|
|
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->field_exists &&
|
|
field->field_exists(opaque, version_id)) ||
|
|
(!field->field_exists &&
|
|
field->version_id <= version_id)) {
|
|
void *base_addr = opaque + field->offset;
|
|
int i, n_elems = 1;
|
|
int size = field->size;
|
|
|
|
if (field->flags & VMS_VBUFFER) {
|
|
size = *(int32_t *)(opaque+field->size_offset);
|
|
if (field->flags & VMS_MULTIPLY) {
|
|
size *= field->size;
|
|
}
|
|
}
|
|
if (field->flags & VMS_ARRAY) {
|
|
n_elems = field->num;
|
|
} else if (field->flags & VMS_VARRAY_INT32) {
|
|
n_elems = *(int32_t *)(opaque+field->num_offset);
|
|
} else if (field->flags & VMS_VARRAY_UINT16) {
|
|
n_elems = *(uint16_t *)(opaque+field->num_offset);
|
|
}
|
|
if (field->flags & VMS_POINTER) {
|
|
base_addr = *(void **)base_addr + field->start;
|
|
}
|
|
for (i = 0; i < n_elems; i++) {
|
|
void *addr = base_addr + 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, size);
|
|
|
|
}
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
field++;
|
|
}
|
|
ret = vmstate_subsection_load(f, vmsd, opaque);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
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) {
|
|
if (!field->field_exists ||
|
|
field->field_exists(opaque, vmsd->version_id)) {
|
|
void *base_addr = opaque + field->offset;
|
|
int i, n_elems = 1;
|
|
int size = field->size;
|
|
|
|
if (field->flags & VMS_VBUFFER) {
|
|
size = *(int32_t *)(opaque+field->size_offset);
|
|
if (field->flags & VMS_MULTIPLY) {
|
|
size *= field->size;
|
|
}
|
|
}
|
|
if (field->flags & VMS_ARRAY) {
|
|
n_elems = field->num;
|
|
} else if (field->flags & VMS_VARRAY_INT32) {
|
|
n_elems = *(int32_t *)(opaque+field->num_offset);
|
|
} else if (field->flags & VMS_VARRAY_UINT16) {
|
|
n_elems = *(uint16_t *)(opaque+field->num_offset);
|
|
}
|
|
if (field->flags & VMS_POINTER) {
|
|
base_addr = *(void **)base_addr + field->start;
|
|
}
|
|
for (i = 0; i < n_elems; i++) {
|
|
void *addr = base_addr + size * i;
|
|
|
|
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
|
addr = *(void **)addr;
|
|
}
|
|
if (field->flags & VMS_STRUCT) {
|
|
vmstate_save_state(f, field->vmsd, addr);
|
|
} else {
|
|
field->info->put(f, addr, size);
|
|
}
|
|
}
|
|
}
|
|
field++;
|
|
}
|
|
vmstate_subsection_save(f, vmsd, 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 int vmstate_save(QEMUFile *f, SaveStateEntry *se)
|
|
{
|
|
if (se->no_migrate) {
|
|
return -1;
|
|
}
|
|
|
|
if (!se->vmsd) { /* Old style */
|
|
se->save_state(f, se->opaque);
|
|
return 0;
|
|
}
|
|
vmstate_save_state(f,se->vmsd, se->opaque);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#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
|
|
#define QEMU_VM_SUBSECTION 0x05
|
|
|
|
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
|
|
int shared)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if(se->set_params == NULL) {
|
|
continue;
|
|
}
|
|
se->set_params(blk_enable, shared, se->opaque);
|
|
}
|
|
|
|
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(mon, f, QEMU_VM_SECTION_START, se->opaque);
|
|
}
|
|
|
|
if (qemu_file_has_error(f)) {
|
|
qemu_savevm_state_cancel(mon, f);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_savevm_state_iterate(Monitor *mon, 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(mon, f, QEMU_VM_SECTION_PART, se->opaque);
|
|
if (!ret) {
|
|
/* Do not proceed to the next vmstate before this one reported
|
|
completion of the current stage. This serializes the migration
|
|
and reduces the probability that a faster changing state is
|
|
synchronized over and over again. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ret)
|
|
return 1;
|
|
|
|
if (qemu_file_has_error(f)) {
|
|
qemu_savevm_state_cancel(mon, f);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
int r;
|
|
|
|
cpu_synchronize_all_states();
|
|
|
|
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(mon, 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);
|
|
|
|
r = vmstate_save(f, se);
|
|
if (r < 0) {
|
|
monitor_printf(mon, "cannot migrate with device '%s'\n", se->idstr);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
if (qemu_file_has_error(f))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (se->save_live_state) {
|
|
se->save_live_state(mon, f, -1, se->opaque);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
|
|
{
|
|
int saved_vm_running;
|
|
int ret;
|
|
|
|
saved_vm_running = vm_running;
|
|
vm_stop(0);
|
|
|
|
bdrv_flush_all();
|
|
|
|
ret = qemu_savevm_state_begin(mon, f, 0, 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
do {
|
|
ret = qemu_savevm_state_iterate(mon, f);
|
|
if (ret < 0)
|
|
goto out;
|
|
} while (ret == 0);
|
|
|
|
ret = qemu_savevm_state_complete(mon, 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 ||
|
|
instance_id == se->alias_id))
|
|
return se;
|
|
/* Migrating from an older version? */
|
|
if (strstr(se->idstr, idstr) && se->compat) {
|
|
if (!strcmp(se->compat->idstr, idstr) &&
|
|
(instance_id == se->compat->instance_id ||
|
|
instance_id == se->alias_id))
|
|
return se;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
|
|
{
|
|
while(sub && sub->needed) {
|
|
if (strcmp(idstr, sub->vmsd->name) == 0) {
|
|
return sub->vmsd;
|
|
}
|
|
sub++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque)
|
|
{
|
|
while (qemu_peek_byte(f) == QEMU_VM_SUBSECTION) {
|
|
char idstr[256];
|
|
int ret;
|
|
uint8_t version_id, len;
|
|
const VMStateDescription *sub_vmsd;
|
|
|
|
qemu_get_byte(f); /* subsection */
|
|
len = qemu_get_byte(f);
|
|
qemu_get_buffer(f, (uint8_t *)idstr, len);
|
|
idstr[len] = 0;
|
|
version_id = qemu_get_be32(f);
|
|
|
|
sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr);
|
|
if (sub_vmsd == NULL) {
|
|
return -ENOENT;
|
|
}
|
|
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
|
|
void *opaque)
|
|
{
|
|
const VMStateSubsection *sub = vmsd->subsections;
|
|
|
|
while (sub && sub->needed) {
|
|
if (sub->needed(opaque)) {
|
|
const VMStateDescription *vmsd = sub->vmsd;
|
|
uint8_t len;
|
|
|
|
qemu_put_byte(f, QEMU_VM_SUBSECTION);
|
|
len = strlen(vmsd->name);
|
|
qemu_put_byte(f, len);
|
|
qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
|
|
qemu_put_be32(f, vmsd->version_id);
|
|
vmstate_save_state(f, vmsd, opaque);
|
|
}
|
|
sub++;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
cpu_synchronize_all_post_init();
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Deletes snapshots of a given name in all opened images.
|
|
*/
|
|
static int del_existing_snapshots(Monitor *mon, const char *name)
|
|
{
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn1, *snapshot = &sn1;
|
|
int ret;
|
|
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs) &&
|
|
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
|
{
|
|
ret = bdrv_snapshot_delete(bs, name);
|
|
if (ret < 0) {
|
|
monitor_printf(mon,
|
|
"Error while deleting snapshot on '%s'\n",
|
|
bdrv_get_device_name(bs));
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void do_savevm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
|
|
int ret;
|
|
QEMUFile *f;
|
|
int saved_vm_running;
|
|
uint32_t vm_state_size;
|
|
#ifdef _WIN32
|
|
struct _timeb tb;
|
|
struct tm *ptm;
|
|
#else
|
|
struct timeval tv;
|
|
struct tm tm;
|
|
#endif
|
|
const char *name = qdict_get_try_str(qdict, "name");
|
|
|
|
/* Verify if there is a device that doesn't support snapshots and is writable */
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
|
|
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
|
|
continue;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
|
bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
}
|
|
|
|
bs = bdrv_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);
|
|
|
|
memset(sn, 0, sizeof(*sn));
|
|
|
|
/* 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 (name) {
|
|
ret = bdrv_snapshot_find(bs, old_sn, name);
|
|
if (ret >= 0) {
|
|
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
|
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
|
} else {
|
|
pstrcpy(sn->name, sizeof(sn->name), name);
|
|
}
|
|
} else {
|
|
#ifdef _WIN32
|
|
ptm = localtime(&tb.time);
|
|
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
|
|
#else
|
|
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
|
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
|
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
|
|
#endif
|
|
}
|
|
|
|
/* Delete old snapshots of the same name */
|
|
if (name && del_existing_snapshots(mon, name) < 0) {
|
|
goto the_end;
|
|
}
|
|
|
|
/* 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(mon, 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 */
|
|
|
|
bs1 = NULL;
|
|
while ((bs1 = bdrv_next(bs1))) {
|
|
if (bdrv_can_snapshot(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(const char *name)
|
|
{
|
|
BlockDriverState *bs, *bs_vm_state;
|
|
QEMUSnapshotInfo sn;
|
|
QEMUFile *f;
|
|
int ret;
|
|
|
|
bs_vm_state = bdrv_snapshots();
|
|
if (!bs_vm_state) {
|
|
error_report("No block device supports snapshots");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Don't even try to load empty VM states */
|
|
ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (sn.vm_state_size == 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Verify if there is any device that doesn't support snapshots and is
|
|
writable and check if the requested snapshot is available too. */
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
|
|
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
|
|
continue;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
error_report("Device '%s' is writable but does not support snapshots.",
|
|
bdrv_get_device_name(bs));
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
ret = bdrv_snapshot_find(bs, &sn, name);
|
|
if (ret < 0) {
|
|
error_report("Device '%s' does not have the requested snapshot '%s'",
|
|
bdrv_get_device_name(bs), name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Flush all IO requests so they don't interfere with the new state. */
|
|
qemu_aio_flush();
|
|
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs)) {
|
|
ret = bdrv_snapshot_goto(bs, name);
|
|
if (ret < 0) {
|
|
error_report("Error %d while activating snapshot '%s' on '%s'",
|
|
ret, name, bdrv_get_device_name(bs));
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* restore the VM state */
|
|
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
|
if (!f) {
|
|
error_report("Could not open VM state file");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = qemu_loadvm_state(f);
|
|
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
error_report("Error %d while loading VM state", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void do_delvm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
int ret;
|
|
const char *name = qdict_get_str(qdict, "name");
|
|
|
|
bs = bdrv_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
bs1 = NULL;
|
|
while ((bs1 = bdrv_next(bs1))) {
|
|
if (bdrv_can_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)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
|
|
int nb_sns, i, ret, available;
|
|
int total;
|
|
int *available_snapshots;
|
|
char buf[256];
|
|
|
|
bs = bdrv_snapshots();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No available block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns < 0) {
|
|
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
|
return;
|
|
}
|
|
|
|
if (nb_sns == 0) {
|
|
monitor_printf(mon, "There is no snapshot available.\n");
|
|
return;
|
|
}
|
|
|
|
available_snapshots = qemu_mallocz(sizeof(int) * nb_sns);
|
|
total = 0;
|
|
for (i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
available = 1;
|
|
bs1 = NULL;
|
|
|
|
while ((bs1 = bdrv_next(bs1))) {
|
|
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
|
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
|
|
if (ret < 0) {
|
|
available = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (available) {
|
|
available_snapshots[total] = i;
|
|
total++;
|
|
}
|
|
}
|
|
|
|
if (total > 0) {
|
|
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
|
|
for (i = 0; i < total; i++) {
|
|
sn = &sn_tab[available_snapshots[i]];
|
|
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
|
|
}
|
|
} else {
|
|
monitor_printf(mon, "There is no suitable snapshot available\n");
|
|
}
|
|
|
|
qemu_free(sn_tab);
|
|
qemu_free(available_snapshots);
|
|
|
|
}
|