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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
25 |
#include <fcntl.h> |
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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> |
31 |
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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.h" |
34 |
|
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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 CONFIG_BSD
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#include <sys/stat.h> |
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#if defined(__FreeBSD__) || 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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#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 <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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|
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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 "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 "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 "qemu-queue.h" |
94 |
|
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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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|
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#define SELF_ANNOUNCE_ROUNDS 5 |
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|
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#ifndef ETH_P_RARP
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#define ETH_P_RARP 0x0835 |
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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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|
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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); |
128 |
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return 60; /* len (FCS will be added by hardware) */ |
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} |
131 |
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static void qemu_announce_self_once(void *opaque) |
133 |
{ |
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int i, len;
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VLANState *vlan; |
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VLANClientState *vc; |
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uint8_t buf[60];
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static int count = SELF_ANNOUNCE_ROUNDS; |
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QEMUTimer *timer = *(QEMUTimer **)opaque; |
140 |
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for (i = 0; i < MAX_NICS; i++) { |
142 |
if (!nd_table[i].used)
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continue;
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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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QTAILQ_FOREACH(vc, &vlan->clients, next) { |
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vc->receive(vc, buf, len); |
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} |
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} |
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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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} |
159 |
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void qemu_announce_self(void) |
161 |
{ |
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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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} |
166 |
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/***********************************************************/
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/* savevm/loadvm support */
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#define IO_BUF_SIZE 32768 |
171 |
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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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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]; |
186 |
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int has_error;
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}; |
189 |
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typedef struct QEMUFileStdio |
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{ |
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FILE *stdio_file; |
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QEMUFile *file; |
194 |
} 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); |
210 |
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if (len == -1) |
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len = -socket_error(); |
213 |
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return len;
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} |
216 |
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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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} |
223 |
|
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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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} |
229 |
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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)); |
240 |
return bytes;
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} |
242 |
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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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pclose(s->stdio_file); |
247 |
qemu_free(s); |
248 |
return 0; |
249 |
} |
250 |
|
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static int stdio_fclose(void *opaque) |
252 |
{ |
253 |
QEMUFileStdio *s = opaque; |
254 |
fclose(s->stdio_file); |
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qemu_free(s); |
256 |
return 0; |
257 |
} |
258 |
|
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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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|
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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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} |
267 |
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = stdio_file; |
271 |
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if(mode[0] == 'r') { |
273 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL); |
274 |
} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL); |
276 |
} |
277 |
return s->file;
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} |
279 |
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
281 |
{ |
282 |
FILE *popen_file; |
283 |
|
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popen_file = popen(command, mode); |
285 |
if(popen_file == NULL) { |
286 |
return NULL; |
287 |
} |
288 |
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289 |
return qemu_popen(popen_file, mode);
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290 |
} |
291 |
|
292 |
int qemu_stdio_fd(QEMUFile *f)
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293 |
{ |
294 |
QEMUFileStdio *p; |
295 |
int fd;
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296 |
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297 |
p = (QEMUFileStdio *)f->opaque; |
298 |
fd = fileno(p->stdio_file); |
299 |
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300 |
return fd;
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301 |
} |
302 |
|
303 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
304 |
{ |
305 |
QEMUFileStdio *s; |
306 |
|
307 |
if (mode == NULL || |
308 |
(mode[0] != 'r' && mode[0] != 'w') || |
309 |
mode[1] != 'b' || mode[2] != 0) { |
310 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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return NULL; |
312 |
} |
313 |
|
314 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = fdopen(fd, mode); |
316 |
if (!s->stdio_file)
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goto fail;
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318 |
|
319 |
if(mode[0] == 'r') { |
320 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL); |
321 |
} else {
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322 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL); |
323 |
} |
324 |
return s->file;
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325 |
|
326 |
fail:
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327 |
qemu_free(s); |
328 |
return NULL; |
329 |
} |
330 |
|
331 |
QEMUFile *qemu_fopen_socket(int fd)
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332 |
{ |
333 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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|
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s->fd = fd; |
336 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
337 |
return s->file;
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338 |
} |
339 |
|
340 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
341 |
int64_t pos, int size)
|
342 |
{ |
343 |
QEMUFileStdio *s = opaque; |
344 |
fseek(s->stdio_file, pos, SEEK_SET); |
345 |
fwrite(buf, 1, size, s->stdio_file);
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346 |
return size;
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347 |
} |
348 |
|
349 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
350 |
{ |
351 |
QEMUFileStdio *s = opaque; |
352 |
fseek(s->stdio_file, pos, SEEK_SET); |
353 |
return fread(buf, 1, size, s->stdio_file); |
354 |
} |
355 |
|
356 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
357 |
{ |
358 |
QEMUFileStdio *s; |
359 |
|
360 |
if (mode == NULL || |
361 |
(mode[0] != 'r' && mode[0] != 'w') || |
362 |
mode[1] != 'b' || mode[2] != 0) { |
363 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
364 |
return NULL; |
365 |
} |
366 |
|
367 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
368 |
|
369 |
s->stdio_file = fopen(filename, mode); |
370 |
if (!s->stdio_file)
|
371 |
goto fail;
|
372 |
|
373 |
if(mode[0] == 'w') { |
374 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL); |
375 |
} else {
|
376 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL); |
377 |
} |
378 |
return s->file;
|
379 |
fail:
|
380 |
qemu_free(s); |
381 |
return NULL; |
382 |
} |
383 |
|
384 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
385 |
int64_t pos, int size)
|
386 |
{ |
387 |
bdrv_save_vmstate(opaque, buf, pos, size); |
388 |
return size;
|
389 |
} |
390 |
|
391 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
392 |
{ |
393 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
394 |
} |
395 |
|
396 |
static int bdrv_fclose(void *opaque) |
397 |
{ |
398 |
return 0; |
399 |
} |
400 |
|
401 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
402 |
{ |
403 |
if (is_writable)
|
404 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
405 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
406 |
} |
407 |
|
408 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
409 |
QEMUFileGetBufferFunc *get_buffer, |
410 |
QEMUFileCloseFunc *close, |
411 |
QEMUFileRateLimit *rate_limit, |
412 |
QEMUFileSetRateLimit *set_rate_limit) |
413 |
{ |
414 |
QEMUFile *f; |
415 |
|
416 |
f = qemu_mallocz(sizeof(QEMUFile));
|
417 |
|
418 |
f->opaque = opaque; |
419 |
f->put_buffer = put_buffer; |
420 |
f->get_buffer = get_buffer; |
421 |
f->close = close; |
422 |
f->rate_limit = rate_limit; |
423 |
f->set_rate_limit = set_rate_limit; |
424 |
f->is_write = 0;
|
425 |
|
426 |
return f;
|
427 |
} |
428 |
|
429 |
int qemu_file_has_error(QEMUFile *f)
|
430 |
{ |
431 |
return f->has_error;
|
432 |
} |
433 |
|
434 |
void qemu_file_set_error(QEMUFile *f)
|
435 |
{ |
436 |
f->has_error = 1;
|
437 |
} |
438 |
|
439 |
void qemu_fflush(QEMUFile *f)
|
440 |
{ |
441 |
if (!f->put_buffer)
|
442 |
return;
|
443 |
|
444 |
if (f->is_write && f->buf_index > 0) { |
445 |
int len;
|
446 |
|
447 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
448 |
if (len > 0) |
449 |
f->buf_offset += f->buf_index; |
450 |
else
|
451 |
f->has_error = 1;
|
452 |
f->buf_index = 0;
|
453 |
} |
454 |
} |
455 |
|
456 |
static void qemu_fill_buffer(QEMUFile *f) |
457 |
{ |
458 |
int len;
|
459 |
|
460 |
if (!f->get_buffer)
|
461 |
return;
|
462 |
|
463 |
if (f->is_write)
|
464 |
abort(); |
465 |
|
466 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
467 |
if (len > 0) { |
468 |
f->buf_index = 0;
|
469 |
f->buf_size = len; |
470 |
f->buf_offset += len; |
471 |
} else if (len != -EAGAIN) |
472 |
f->has_error = 1;
|
473 |
} |
474 |
|
475 |
int qemu_fclose(QEMUFile *f)
|
476 |
{ |
477 |
int ret = 0; |
478 |
qemu_fflush(f); |
479 |
if (f->close)
|
480 |
ret = f->close(f->opaque); |
481 |
qemu_free(f); |
482 |
return ret;
|
483 |
} |
484 |
|
485 |
void qemu_file_put_notify(QEMUFile *f)
|
486 |
{ |
487 |
f->put_buffer(f->opaque, NULL, 0, 0); |
488 |
} |
489 |
|
490 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
491 |
{ |
492 |
int l;
|
493 |
|
494 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
495 |
fprintf(stderr, |
496 |
"Attempted to write to buffer while read buffer is not empty\n");
|
497 |
abort(); |
498 |
} |
499 |
|
500 |
while (!f->has_error && size > 0) { |
501 |
l = IO_BUF_SIZE - f->buf_index; |
502 |
if (l > size)
|
503 |
l = size; |
504 |
memcpy(f->buf + f->buf_index, buf, l); |
505 |
f->is_write = 1;
|
506 |
f->buf_index += l; |
507 |
buf += l; |
508 |
size -= l; |
509 |
if (f->buf_index >= IO_BUF_SIZE)
|
510 |
qemu_fflush(f); |
511 |
} |
512 |
} |
513 |
|
514 |
void qemu_put_byte(QEMUFile *f, int v) |
515 |
{ |
516 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
517 |
fprintf(stderr, |
518 |
"Attempted to write to buffer while read buffer is not empty\n");
|
519 |
abort(); |
520 |
} |
521 |
|
522 |
f->buf[f->buf_index++] = v; |
523 |
f->is_write = 1;
|
524 |
if (f->buf_index >= IO_BUF_SIZE)
|
525 |
qemu_fflush(f); |
526 |
} |
527 |
|
528 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
529 |
{ |
530 |
int size, l;
|
531 |
|
532 |
if (f->is_write)
|
533 |
abort(); |
534 |
|
535 |
size = size1; |
536 |
while (size > 0) { |
537 |
l = f->buf_size - f->buf_index; |
538 |
if (l == 0) { |
539 |
qemu_fill_buffer(f); |
540 |
l = f->buf_size - f->buf_index; |
541 |
if (l == 0) |
542 |
break;
|
543 |
} |
544 |
if (l > size)
|
545 |
l = size; |
546 |
memcpy(buf, f->buf + f->buf_index, l); |
547 |
f->buf_index += l; |
548 |
buf += l; |
549 |
size -= l; |
550 |
} |
551 |
return size1 - size;
|
552 |
} |
553 |
|
554 |
int qemu_get_byte(QEMUFile *f)
|
555 |
{ |
556 |
if (f->is_write)
|
557 |
abort(); |
558 |
|
559 |
if (f->buf_index >= f->buf_size) {
|
560 |
qemu_fill_buffer(f); |
561 |
if (f->buf_index >= f->buf_size)
|
562 |
return 0; |
563 |
} |
564 |
return f->buf[f->buf_index++];
|
565 |
} |
566 |
|
567 |
int64_t qemu_ftell(QEMUFile *f) |
568 |
{ |
569 |
return f->buf_offset - f->buf_size + f->buf_index;
|
570 |
} |
571 |
|
572 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
573 |
{ |
574 |
if (whence == SEEK_SET) {
|
575 |
/* nothing to do */
|
576 |
} else if (whence == SEEK_CUR) { |
577 |
pos += qemu_ftell(f); |
578 |
} else {
|
579 |
/* SEEK_END not supported */
|
580 |
return -1; |
581 |
} |
582 |
if (f->put_buffer) {
|
583 |
qemu_fflush(f); |
584 |
f->buf_offset = pos; |
585 |
} else {
|
586 |
f->buf_offset = pos; |
587 |
f->buf_index = 0;
|
588 |
f->buf_size = 0;
|
589 |
} |
590 |
return pos;
|
591 |
} |
592 |
|
593 |
int qemu_file_rate_limit(QEMUFile *f)
|
594 |
{ |
595 |
if (f->rate_limit)
|
596 |
return f->rate_limit(f->opaque);
|
597 |
|
598 |
return 0; |
599 |
} |
600 |
|
601 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
602 |
{ |
603 |
/* any failed or completed migration keeps its state to allow probing of
|
604 |
* migration data, but has no associated file anymore */
|
605 |
if (f && f->set_rate_limit)
|
606 |
return f->set_rate_limit(f->opaque, new_rate);
|
607 |
|
608 |
return 0; |
609 |
} |
610 |
|
611 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
612 |
{ |
613 |
qemu_put_byte(f, v >> 8);
|
614 |
qemu_put_byte(f, v); |
615 |
} |
616 |
|
617 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
618 |
{ |
619 |
qemu_put_byte(f, v >> 24);
|
620 |
qemu_put_byte(f, v >> 16);
|
621 |
qemu_put_byte(f, v >> 8);
|
622 |
qemu_put_byte(f, v); |
623 |
} |
624 |
|
625 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
626 |
{ |
627 |
qemu_put_be32(f, v >> 32);
|
628 |
qemu_put_be32(f, v); |
629 |
} |
630 |
|
631 |
unsigned int qemu_get_be16(QEMUFile *f) |
632 |
{ |
633 |
unsigned int v; |
634 |
v = qemu_get_byte(f) << 8;
|
635 |
v |= qemu_get_byte(f); |
636 |
return v;
|
637 |
} |
638 |
|
639 |
unsigned int qemu_get_be32(QEMUFile *f) |
640 |
{ |
641 |
unsigned int v; |
642 |
v = qemu_get_byte(f) << 24;
|
643 |
v |= qemu_get_byte(f) << 16;
|
644 |
v |= qemu_get_byte(f) << 8;
|
645 |
v |= qemu_get_byte(f); |
646 |
return v;
|
647 |
} |
648 |
|
649 |
uint64_t qemu_get_be64(QEMUFile *f) |
650 |
{ |
651 |
uint64_t v; |
652 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
653 |
v |= qemu_get_be32(f); |
654 |
return v;
|
655 |
} |
656 |
|
657 |
/* 8 bit int */
|
658 |
|
659 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
660 |
{ |
661 |
int8_t *v = pv; |
662 |
qemu_get_s8s(f, v); |
663 |
return 0; |
664 |
} |
665 |
|
666 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
667 |
{ |
668 |
int8_t *v = pv; |
669 |
qemu_put_s8s(f, v); |
670 |
} |
671 |
|
672 |
const VMStateInfo vmstate_info_int8 = {
|
673 |
.name = "int8",
|
674 |
.get = get_int8, |
675 |
.put = put_int8, |
676 |
}; |
677 |
|
678 |
/* 16 bit int */
|
679 |
|
680 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
681 |
{ |
682 |
int16_t *v = pv; |
683 |
qemu_get_sbe16s(f, v); |
684 |
return 0; |
685 |
} |
686 |
|
687 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
688 |
{ |
689 |
int16_t *v = pv; |
690 |
qemu_put_sbe16s(f, v); |
691 |
} |
692 |
|
693 |
const VMStateInfo vmstate_info_int16 = {
|
694 |
.name = "int16",
|
695 |
.get = get_int16, |
696 |
.put = put_int16, |
697 |
}; |
698 |
|
699 |
/* 32 bit int */
|
700 |
|
701 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
702 |
{ |
703 |
int32_t *v = pv; |
704 |
qemu_get_sbe32s(f, v); |
705 |
return 0; |
706 |
} |
707 |
|
708 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
709 |
{ |
710 |
int32_t *v = pv; |
711 |
qemu_put_sbe32s(f, v); |
712 |
} |
713 |
|
714 |
const VMStateInfo vmstate_info_int32 = {
|
715 |
.name = "int32",
|
716 |
.get = get_int32, |
717 |
.put = put_int32, |
718 |
}; |
719 |
|
720 |
/* 32 bit int. See that the received value is the same than the one
|
721 |
in the field */
|
722 |
|
723 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
724 |
{ |
725 |
int32_t *v = pv; |
726 |
int32_t v2; |
727 |
qemu_get_sbe32s(f, &v2); |
728 |
|
729 |
if (*v == v2)
|
730 |
return 0; |
731 |
return -EINVAL;
|
732 |
} |
733 |
|
734 |
const VMStateInfo vmstate_info_int32_equal = {
|
735 |
.name = "int32 equal",
|
736 |
.get = get_int32_equal, |
737 |
.put = put_int32, |
738 |
}; |
739 |
|
740 |
/* 32 bit int. See that the received value is the less or the same
|
741 |
than the one in the field */
|
742 |
|
743 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
744 |
{ |
745 |
int32_t *old = pv; |
746 |
int32_t new; |
747 |
qemu_get_sbe32s(f, &new); |
748 |
|
749 |
if (*old <= new)
|
750 |
return 0; |
751 |
return -EINVAL;
|
752 |
} |
753 |
|
754 |
const VMStateInfo vmstate_info_int32_le = {
|
755 |
.name = "int32 equal",
|
756 |
.get = get_int32_le, |
757 |
.put = put_int32, |
758 |
}; |
759 |
|
760 |
/* 64 bit int */
|
761 |
|
762 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
763 |
{ |
764 |
int64_t *v = pv; |
765 |
qemu_get_sbe64s(f, v); |
766 |
return 0; |
767 |
} |
768 |
|
769 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
770 |
{ |
771 |
int64_t *v = pv; |
772 |
qemu_put_sbe64s(f, v); |
773 |
} |
774 |
|
775 |
const VMStateInfo vmstate_info_int64 = {
|
776 |
.name = "int64",
|
777 |
.get = get_int64, |
778 |
.put = put_int64, |
779 |
}; |
780 |
|
781 |
/* 8 bit unsigned int */
|
782 |
|
783 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
784 |
{ |
785 |
uint8_t *v = pv; |
786 |
qemu_get_8s(f, v); |
787 |
return 0; |
788 |
} |
789 |
|
790 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
791 |
{ |
792 |
uint8_t *v = pv; |
793 |
qemu_put_8s(f, v); |
794 |
} |
795 |
|
796 |
const VMStateInfo vmstate_info_uint8 = {
|
797 |
.name = "uint8",
|
798 |
.get = get_uint8, |
799 |
.put = put_uint8, |
800 |
}; |
801 |
|
802 |
/* 16 bit unsigned int */
|
803 |
|
804 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
805 |
{ |
806 |
uint16_t *v = pv; |
807 |
qemu_get_be16s(f, v); |
808 |
return 0; |
809 |
} |
810 |
|
811 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
812 |
{ |
813 |
uint16_t *v = pv; |
814 |
qemu_put_be16s(f, v); |
815 |
} |
816 |
|
817 |
const VMStateInfo vmstate_info_uint16 = {
|
818 |
.name = "uint16",
|
819 |
.get = get_uint16, |
820 |
.put = put_uint16, |
821 |
}; |
822 |
|
823 |
/* 32 bit unsigned int */
|
824 |
|
825 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
826 |
{ |
827 |
uint32_t *v = pv; |
828 |
qemu_get_be32s(f, v); |
829 |
return 0; |
830 |
} |
831 |
|
832 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
833 |
{ |
834 |
uint32_t *v = pv; |
835 |
qemu_put_be32s(f, v); |
836 |
} |
837 |
|
838 |
const VMStateInfo vmstate_info_uint32 = {
|
839 |
.name = "uint32",
|
840 |
.get = get_uint32, |
841 |
.put = put_uint32, |
842 |
}; |
843 |
|
844 |
/* 64 bit unsigned int */
|
845 |
|
846 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
847 |
{ |
848 |
uint64_t *v = pv; |
849 |
qemu_get_be64s(f, v); |
850 |
return 0; |
851 |
} |
852 |
|
853 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
854 |
{ |
855 |
uint64_t *v = pv; |
856 |
qemu_put_be64s(f, v); |
857 |
} |
858 |
|
859 |
const VMStateInfo vmstate_info_uint64 = {
|
860 |
.name = "uint64",
|
861 |
.get = get_uint64, |
862 |
.put = put_uint64, |
863 |
}; |
864 |
|
865 |
/* 8 bit int. See that the received value is the same than the one
|
866 |
in the field */
|
867 |
|
868 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
869 |
{ |
870 |
uint8_t *v = pv; |
871 |
uint8_t v2; |
872 |
qemu_get_8s(f, &v2); |
873 |
|
874 |
if (*v == v2)
|
875 |
return 0; |
876 |
return -EINVAL;
|
877 |
} |
878 |
|
879 |
const VMStateInfo vmstate_info_uint8_equal = {
|
880 |
.name = "int32 equal",
|
881 |
.get = get_uint8_equal, |
882 |
.put = put_uint8, |
883 |
}; |
884 |
|
885 |
/* timers */
|
886 |
|
887 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
888 |
{ |
889 |
QEMUTimer *v = pv; |
890 |
qemu_get_timer(f, v); |
891 |
return 0; |
892 |
} |
893 |
|
894 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
895 |
{ |
896 |
QEMUTimer *v = pv; |
897 |
qemu_put_timer(f, v); |
898 |
} |
899 |
|
900 |
const VMStateInfo vmstate_info_timer = {
|
901 |
.name = "timer",
|
902 |
.get = get_timer, |
903 |
.put = put_timer, |
904 |
}; |
905 |
|
906 |
/* uint8_t buffers */
|
907 |
|
908 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
909 |
{ |
910 |
uint8_t *v = pv; |
911 |
qemu_get_buffer(f, v, size); |
912 |
return 0; |
913 |
} |
914 |
|
915 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
916 |
{ |
917 |
uint8_t *v = pv; |
918 |
qemu_put_buffer(f, v, size); |
919 |
} |
920 |
|
921 |
const VMStateInfo vmstate_info_buffer = {
|
922 |
.name = "buffer",
|
923 |
.get = get_buffer, |
924 |
.put = put_buffer, |
925 |
}; |
926 |
|
927 |
typedef struct SaveStateEntry { |
928 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
929 |
char idstr[256]; |
930 |
int instance_id;
|
931 |
int version_id;
|
932 |
int section_id;
|
933 |
SaveLiveStateHandler *save_live_state; |
934 |
SaveStateHandler *save_state; |
935 |
LoadStateHandler *load_state; |
936 |
const VMStateDescription *vmsd;
|
937 |
void *opaque;
|
938 |
} SaveStateEntry; |
939 |
|
940 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
941 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
942 |
static int global_section_id; |
943 |
|
944 |
static int calculate_new_instance_id(const char *idstr) |
945 |
{ |
946 |
SaveStateEntry *se; |
947 |
int instance_id = 0; |
948 |
|
949 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
950 |
if (strcmp(idstr, se->idstr) == 0 |
951 |
&& instance_id <= se->instance_id) { |
952 |
instance_id = se->instance_id + 1;
|
953 |
} |
954 |
} |
955 |
return instance_id;
|
956 |
} |
957 |
|
958 |
/* TODO: Individual devices generally have very little idea about the rest
|
959 |
of the system, so instance_id should be removed/replaced.
|
960 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
961 |
distinguishing id for all instances of your device class. */
|
962 |
int register_savevm_live(const char *idstr, |
963 |
int instance_id,
|
964 |
int version_id,
|
965 |
SaveLiveStateHandler *save_live_state, |
966 |
SaveStateHandler *save_state, |
967 |
LoadStateHandler *load_state, |
968 |
void *opaque)
|
969 |
{ |
970 |
SaveStateEntry *se; |
971 |
|
972 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
973 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
974 |
se->version_id = version_id; |
975 |
se->section_id = global_section_id++; |
976 |
se->save_live_state = save_live_state; |
977 |
se->save_state = save_state; |
978 |
se->load_state = load_state; |
979 |
se->opaque = opaque; |
980 |
se->vmsd = NULL;
|
981 |
|
982 |
if (instance_id == -1) { |
983 |
se->instance_id = calculate_new_instance_id(idstr); |
984 |
} else {
|
985 |
se->instance_id = instance_id; |
986 |
} |
987 |
/* add at the end of list */
|
988 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
989 |
return 0; |
990 |
} |
991 |
|
992 |
int register_savevm(const char *idstr, |
993 |
int instance_id,
|
994 |
int version_id,
|
995 |
SaveStateHandler *save_state, |
996 |
LoadStateHandler *load_state, |
997 |
void *opaque)
|
998 |
{ |
999 |
return register_savevm_live(idstr, instance_id, version_id,
|
1000 |
NULL, save_state, load_state, opaque);
|
1001 |
} |
1002 |
|
1003 |
void unregister_savevm(const char *idstr, void *opaque) |
1004 |
{ |
1005 |
SaveStateEntry *se, *new_se; |
1006 |
|
1007 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1008 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
1009 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1010 |
qemu_free(se); |
1011 |
} |
1012 |
} |
1013 |
} |
1014 |
|
1015 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
1016 |
void *opaque)
|
1017 |
{ |
1018 |
SaveStateEntry *se; |
1019 |
|
1020 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
1021 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
1022 |
se->version_id = vmsd->version_id; |
1023 |
se->section_id = global_section_id++; |
1024 |
se->save_live_state = NULL;
|
1025 |
se->save_state = NULL;
|
1026 |
se->load_state = NULL;
|
1027 |
se->opaque = opaque; |
1028 |
se->vmsd = vmsd; |
1029 |
|
1030 |
if (instance_id == -1) { |
1031 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
1032 |
} else {
|
1033 |
se->instance_id = instance_id; |
1034 |
} |
1035 |
/* add at the end of list */
|
1036 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1037 |
return 0; |
1038 |
} |
1039 |
|
1040 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
1041 |
{ |
1042 |
SaveStateEntry *se, *new_se; |
1043 |
|
1044 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1045 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1046 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1047 |
qemu_free(se); |
1048 |
} |
1049 |
} |
1050 |
} |
1051 |
|
1052 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1053 |
void *opaque, int version_id) |
1054 |
{ |
1055 |
VMStateField *field = vmsd->fields; |
1056 |
|
1057 |
if (version_id > vmsd->version_id) {
|
1058 |
return -EINVAL;
|
1059 |
} |
1060 |
if (version_id < vmsd->minimum_version_id_old) {
|
1061 |
return -EINVAL;
|
1062 |
} |
1063 |
if (version_id < vmsd->minimum_version_id) {
|
1064 |
return vmsd->load_state_old(f, opaque, version_id);
|
1065 |
} |
1066 |
if (vmsd->pre_load) {
|
1067 |
int ret = vmsd->pre_load(opaque);
|
1068 |
if (ret)
|
1069 |
return ret;
|
1070 |
} |
1071 |
while(field->name) {
|
1072 |
if ((field->field_exists &&
|
1073 |
field->field_exists(opaque, version_id)) || |
1074 |
(!field->field_exists && |
1075 |
field->version_id <= version_id)) { |
1076 |
void *base_addr = opaque + field->offset;
|
1077 |
int ret, i, n_elems = 1; |
1078 |
|
1079 |
if (field->flags & VMS_ARRAY) {
|
1080 |
n_elems = field->num; |
1081 |
} else if (field->flags & VMS_VARRAY) { |
1082 |
n_elems = *(size_t *)(opaque+field->num_offset); |
1083 |
} |
1084 |
if (field->flags & VMS_POINTER) {
|
1085 |
base_addr = *(void **)base_addr;
|
1086 |
} |
1087 |
for (i = 0; i < n_elems; i++) { |
1088 |
void *addr = base_addr + field->size * i;
|
1089 |
|
1090 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1091 |
addr = *(void **)addr;
|
1092 |
} |
1093 |
if (field->flags & VMS_STRUCT) {
|
1094 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1095 |
} else {
|
1096 |
ret = field->info->get(f, addr, field->size); |
1097 |
|
1098 |
} |
1099 |
if (ret < 0) { |
1100 |
return ret;
|
1101 |
} |
1102 |
} |
1103 |
} |
1104 |
field++; |
1105 |
} |
1106 |
if (vmsd->post_load) {
|
1107 |
return vmsd->post_load(opaque, version_id);
|
1108 |
} |
1109 |
return 0; |
1110 |
} |
1111 |
|
1112 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1113 |
void *opaque)
|
1114 |
{ |
1115 |
VMStateField *field = vmsd->fields; |
1116 |
|
1117 |
if (vmsd->pre_save) {
|
1118 |
vmsd->pre_save(opaque); |
1119 |
} |
1120 |
while(field->name) {
|
1121 |
if (!field->field_exists ||
|
1122 |
field->field_exists(opaque, vmsd->version_id)) { |
1123 |
void *base_addr = opaque + field->offset;
|
1124 |
int i, n_elems = 1; |
1125 |
|
1126 |
if (field->flags & VMS_ARRAY) {
|
1127 |
n_elems = field->num; |
1128 |
} else if (field->flags & VMS_VARRAY) { |
1129 |
n_elems = *(size_t *)(opaque+field->num_offset); |
1130 |
} |
1131 |
if (field->flags & VMS_POINTER) {
|
1132 |
base_addr = *(void **)base_addr;
|
1133 |
} |
1134 |
for (i = 0; i < n_elems; i++) { |
1135 |
void *addr = base_addr + field->size * i;
|
1136 |
|
1137 |
if (field->flags & VMS_STRUCT) {
|
1138 |
vmstate_save_state(f, field->vmsd, addr); |
1139 |
} else {
|
1140 |
field->info->put(f, addr, field->size); |
1141 |
} |
1142 |
} |
1143 |
} |
1144 |
field++; |
1145 |
} |
1146 |
if (vmsd->post_save) {
|
1147 |
vmsd->post_save(opaque); |
1148 |
} |
1149 |
} |
1150 |
|
1151 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1152 |
{ |
1153 |
if (!se->vmsd) { /* Old style */ |
1154 |
return se->load_state(f, se->opaque, version_id);
|
1155 |
} |
1156 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1157 |
} |
1158 |
|
1159 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1160 |
{ |
1161 |
if (!se->vmsd) { /* Old style */ |
1162 |
se->save_state(f, se->opaque); |
1163 |
return;
|
1164 |
} |
1165 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1166 |
} |
1167 |
|
1168 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1169 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1170 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1171 |
|
1172 |
#define QEMU_VM_EOF 0x00 |
1173 |
#define QEMU_VM_SECTION_START 0x01 |
1174 |
#define QEMU_VM_SECTION_PART 0x02 |
1175 |
#define QEMU_VM_SECTION_END 0x03 |
1176 |
#define QEMU_VM_SECTION_FULL 0x04 |
1177 |
|
1178 |
int qemu_savevm_state_begin(QEMUFile *f)
|
1179 |
{ |
1180 |
SaveStateEntry *se; |
1181 |
|
1182 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1183 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1184 |
|
1185 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1186 |
int len;
|
1187 |
|
1188 |
if (se->save_live_state == NULL) |
1189 |
continue;
|
1190 |
|
1191 |
/* Section type */
|
1192 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1193 |
qemu_put_be32(f, se->section_id); |
1194 |
|
1195 |
/* ID string */
|
1196 |
len = strlen(se->idstr); |
1197 |
qemu_put_byte(f, len); |
1198 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1199 |
|
1200 |
qemu_put_be32(f, se->instance_id); |
1201 |
qemu_put_be32(f, se->version_id); |
1202 |
|
1203 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
1204 |
} |
1205 |
|
1206 |
if (qemu_file_has_error(f))
|
1207 |
return -EIO;
|
1208 |
|
1209 |
return 0; |
1210 |
} |
1211 |
|
1212 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1213 |
{ |
1214 |
SaveStateEntry *se; |
1215 |
int ret = 1; |
1216 |
|
1217 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1218 |
if (se->save_live_state == NULL) |
1219 |
continue;
|
1220 |
|
1221 |
/* Section type */
|
1222 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1223 |
qemu_put_be32(f, se->section_id); |
1224 |
|
1225 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
1226 |
} |
1227 |
|
1228 |
if (ret)
|
1229 |
return 1; |
1230 |
|
1231 |
if (qemu_file_has_error(f))
|
1232 |
return -EIO;
|
1233 |
|
1234 |
return 0; |
1235 |
} |
1236 |
|
1237 |
int qemu_savevm_state_complete(QEMUFile *f)
|
1238 |
{ |
1239 |
SaveStateEntry *se; |
1240 |
|
1241 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1242 |
if (se->save_live_state == NULL) |
1243 |
continue;
|
1244 |
|
1245 |
/* Section type */
|
1246 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1247 |
qemu_put_be32(f, se->section_id); |
1248 |
|
1249 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
1250 |
} |
1251 |
|
1252 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1253 |
int len;
|
1254 |
|
1255 |
if (se->save_state == NULL && se->vmsd == NULL) |
1256 |
continue;
|
1257 |
|
1258 |
/* Section type */
|
1259 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1260 |
qemu_put_be32(f, se->section_id); |
1261 |
|
1262 |
/* ID string */
|
1263 |
len = strlen(se->idstr); |
1264 |
qemu_put_byte(f, len); |
1265 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1266 |
|
1267 |
qemu_put_be32(f, se->instance_id); |
1268 |
qemu_put_be32(f, se->version_id); |
1269 |
|
1270 |
vmstate_save(f, se); |
1271 |
} |
1272 |
|
1273 |
qemu_put_byte(f, QEMU_VM_EOF); |
1274 |
|
1275 |
if (qemu_file_has_error(f))
|
1276 |
return -EIO;
|
1277 |
|
1278 |
return 0; |
1279 |
} |
1280 |
|
1281 |
int qemu_savevm_state(QEMUFile *f)
|
1282 |
{ |
1283 |
int saved_vm_running;
|
1284 |
int ret;
|
1285 |
|
1286 |
saved_vm_running = vm_running; |
1287 |
vm_stop(0);
|
1288 |
|
1289 |
bdrv_flush_all(); |
1290 |
|
1291 |
ret = qemu_savevm_state_begin(f); |
1292 |
if (ret < 0) |
1293 |
goto out;
|
1294 |
|
1295 |
do {
|
1296 |
ret = qemu_savevm_state_iterate(f); |
1297 |
if (ret < 0) |
1298 |
goto out;
|
1299 |
} while (ret == 0); |
1300 |
|
1301 |
ret = qemu_savevm_state_complete(f); |
1302 |
|
1303 |
out:
|
1304 |
if (qemu_file_has_error(f))
|
1305 |
ret = -EIO; |
1306 |
|
1307 |
if (!ret && saved_vm_running)
|
1308 |
vm_start(); |
1309 |
|
1310 |
return ret;
|
1311 |
} |
1312 |
|
1313 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1314 |
{ |
1315 |
SaveStateEntry *se; |
1316 |
|
1317 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1318 |
if (!strcmp(se->idstr, idstr) &&
|
1319 |
instance_id == se->instance_id) |
1320 |
return se;
|
1321 |
} |
1322 |
return NULL; |
1323 |
} |
1324 |
|
1325 |
typedef struct LoadStateEntry { |
1326 |
QLIST_ENTRY(LoadStateEntry) entry; |
1327 |
SaveStateEntry *se; |
1328 |
int section_id;
|
1329 |
int version_id;
|
1330 |
} LoadStateEntry; |
1331 |
|
1332 |
int qemu_loadvm_state(QEMUFile *f)
|
1333 |
{ |
1334 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1335 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1336 |
LoadStateEntry *le, *new_le; |
1337 |
uint8_t section_type; |
1338 |
unsigned int v; |
1339 |
int ret;
|
1340 |
|
1341 |
v = qemu_get_be32(f); |
1342 |
if (v != QEMU_VM_FILE_MAGIC)
|
1343 |
return -EINVAL;
|
1344 |
|
1345 |
v = qemu_get_be32(f); |
1346 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1347 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1348 |
return -ENOTSUP;
|
1349 |
} |
1350 |
if (v != QEMU_VM_FILE_VERSION)
|
1351 |
return -ENOTSUP;
|
1352 |
|
1353 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1354 |
uint32_t instance_id, version_id, section_id; |
1355 |
SaveStateEntry *se; |
1356 |
char idstr[257]; |
1357 |
int len;
|
1358 |
|
1359 |
switch (section_type) {
|
1360 |
case QEMU_VM_SECTION_START:
|
1361 |
case QEMU_VM_SECTION_FULL:
|
1362 |
/* Read section start */
|
1363 |
section_id = qemu_get_be32(f); |
1364 |
len = qemu_get_byte(f); |
1365 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1366 |
idstr[len] = 0;
|
1367 |
instance_id = qemu_get_be32(f); |
1368 |
version_id = qemu_get_be32(f); |
1369 |
|
1370 |
/* Find savevm section */
|
1371 |
se = find_se(idstr, instance_id); |
1372 |
if (se == NULL) { |
1373 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1374 |
ret = -EINVAL; |
1375 |
goto out;
|
1376 |
} |
1377 |
|
1378 |
/* Validate version */
|
1379 |
if (version_id > se->version_id) {
|
1380 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1381 |
version_id, idstr, se->version_id); |
1382 |
ret = -EINVAL; |
1383 |
goto out;
|
1384 |
} |
1385 |
|
1386 |
/* Add entry */
|
1387 |
le = qemu_mallocz(sizeof(*le));
|
1388 |
|
1389 |
le->se = se; |
1390 |
le->section_id = section_id; |
1391 |
le->version_id = version_id; |
1392 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1393 |
|
1394 |
ret = vmstate_load(f, le->se, le->version_id); |
1395 |
if (ret < 0) { |
1396 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1397 |
instance_id, idstr); |
1398 |
goto out;
|
1399 |
} |
1400 |
break;
|
1401 |
case QEMU_VM_SECTION_PART:
|
1402 |
case QEMU_VM_SECTION_END:
|
1403 |
section_id = qemu_get_be32(f); |
1404 |
|
1405 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1406 |
if (le->section_id == section_id) {
|
1407 |
break;
|
1408 |
} |
1409 |
} |
1410 |
if (le == NULL) { |
1411 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1412 |
ret = -EINVAL; |
1413 |
goto out;
|
1414 |
} |
1415 |
|
1416 |
ret = vmstate_load(f, le->se, le->version_id); |
1417 |
if (ret < 0) { |
1418 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1419 |
section_id); |
1420 |
goto out;
|
1421 |
} |
1422 |
break;
|
1423 |
default:
|
1424 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1425 |
ret = -EINVAL; |
1426 |
goto out;
|
1427 |
} |
1428 |
} |
1429 |
|
1430 |
ret = 0;
|
1431 |
|
1432 |
out:
|
1433 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1434 |
QLIST_REMOVE(le, entry); |
1435 |
qemu_free(le); |
1436 |
} |
1437 |
|
1438 |
if (qemu_file_has_error(f))
|
1439 |
ret = -EIO; |
1440 |
|
1441 |
return ret;
|
1442 |
} |
1443 |
|
1444 |
/* device can contain snapshots */
|
1445 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1446 |
{ |
1447 |
return (bs &&
|
1448 |
!bdrv_is_removable(bs) && |
1449 |
!bdrv_is_read_only(bs)); |
1450 |
} |
1451 |
|
1452 |
/* device must be snapshots in order to have a reliable snapshot */
|
1453 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1454 |
{ |
1455 |
return (bs &&
|
1456 |
!bdrv_is_removable(bs) && |
1457 |
!bdrv_is_read_only(bs)); |
1458 |
} |
1459 |
|
1460 |
static BlockDriverState *get_bs_snapshots(void) |
1461 |
{ |
1462 |
BlockDriverState *bs; |
1463 |
DriveInfo *dinfo; |
1464 |
|
1465 |
if (bs_snapshots)
|
1466 |
return bs_snapshots;
|
1467 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1468 |
bs = dinfo->bdrv; |
1469 |
if (bdrv_can_snapshot(bs))
|
1470 |
goto ok;
|
1471 |
} |
1472 |
return NULL; |
1473 |
ok:
|
1474 |
bs_snapshots = bs; |
1475 |
return bs;
|
1476 |
} |
1477 |
|
1478 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1479 |
const char *name) |
1480 |
{ |
1481 |
QEMUSnapshotInfo *sn_tab, *sn; |
1482 |
int nb_sns, i, ret;
|
1483 |
|
1484 |
ret = -ENOENT; |
1485 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1486 |
if (nb_sns < 0) |
1487 |
return ret;
|
1488 |
for(i = 0; i < nb_sns; i++) { |
1489 |
sn = &sn_tab[i]; |
1490 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1491 |
*sn_info = *sn; |
1492 |
ret = 0;
|
1493 |
break;
|
1494 |
} |
1495 |
} |
1496 |
qemu_free(sn_tab); |
1497 |
return ret;
|
1498 |
} |
1499 |
|
1500 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1501 |
{ |
1502 |
DriveInfo *dinfo; |
1503 |
BlockDriverState *bs, *bs1; |
1504 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1505 |
int must_delete, ret;
|
1506 |
QEMUFile *f; |
1507 |
int saved_vm_running;
|
1508 |
uint32_t vm_state_size; |
1509 |
#ifdef _WIN32
|
1510 |
struct _timeb tb;
|
1511 |
#else
|
1512 |
struct timeval tv;
|
1513 |
#endif
|
1514 |
const char *name = qdict_get_try_str(qdict, "name"); |
1515 |
|
1516 |
bs = get_bs_snapshots(); |
1517 |
if (!bs) {
|
1518 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1519 |
return;
|
1520 |
} |
1521 |
|
1522 |
/* ??? Should this occur after vm_stop? */
|
1523 |
qemu_aio_flush(); |
1524 |
|
1525 |
saved_vm_running = vm_running; |
1526 |
vm_stop(0);
|
1527 |
|
1528 |
must_delete = 0;
|
1529 |
if (name) {
|
1530 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1531 |
if (ret >= 0) { |
1532 |
must_delete = 1;
|
1533 |
} |
1534 |
} |
1535 |
memset(sn, 0, sizeof(*sn)); |
1536 |
if (must_delete) {
|
1537 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1538 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1539 |
} else {
|
1540 |
if (name)
|
1541 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1542 |
} |
1543 |
|
1544 |
/* fill auxiliary fields */
|
1545 |
#ifdef _WIN32
|
1546 |
_ftime(&tb); |
1547 |
sn->date_sec = tb.time; |
1548 |
sn->date_nsec = tb.millitm * 1000000;
|
1549 |
#else
|
1550 |
gettimeofday(&tv, NULL);
|
1551 |
sn->date_sec = tv.tv_sec; |
1552 |
sn->date_nsec = tv.tv_usec * 1000;
|
1553 |
#endif
|
1554 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1555 |
|
1556 |
/* save the VM state */
|
1557 |
f = qemu_fopen_bdrv(bs, 1);
|
1558 |
if (!f) {
|
1559 |
monitor_printf(mon, "Could not open VM state file\n");
|
1560 |
goto the_end;
|
1561 |
} |
1562 |
ret = qemu_savevm_state(f); |
1563 |
vm_state_size = qemu_ftell(f); |
1564 |
qemu_fclose(f); |
1565 |
if (ret < 0) { |
1566 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1567 |
goto the_end;
|
1568 |
} |
1569 |
|
1570 |
/* create the snapshots */
|
1571 |
|
1572 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1573 |
bs1 = dinfo->bdrv; |
1574 |
if (bdrv_has_snapshot(bs1)) {
|
1575 |
if (must_delete) {
|
1576 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1577 |
if (ret < 0) { |
1578 |
monitor_printf(mon, |
1579 |
"Error while deleting snapshot on '%s'\n",
|
1580 |
bdrv_get_device_name(bs1)); |
1581 |
} |
1582 |
} |
1583 |
/* Write VM state size only to the image that contains the state */
|
1584 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1585 |
ret = bdrv_snapshot_create(bs1, sn); |
1586 |
if (ret < 0) { |
1587 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1588 |
bdrv_get_device_name(bs1)); |
1589 |
} |
1590 |
} |
1591 |
} |
1592 |
|
1593 |
the_end:
|
1594 |
if (saved_vm_running)
|
1595 |
vm_start(); |
1596 |
} |
1597 |
|
1598 |
int load_vmstate(Monitor *mon, const char *name) |
1599 |
{ |
1600 |
DriveInfo *dinfo; |
1601 |
BlockDriverState *bs, *bs1; |
1602 |
QEMUSnapshotInfo sn; |
1603 |
QEMUFile *f; |
1604 |
int ret;
|
1605 |
|
1606 |
bs = get_bs_snapshots(); |
1607 |
if (!bs) {
|
1608 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1609 |
return -EINVAL;
|
1610 |
} |
1611 |
|
1612 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1613 |
qemu_aio_flush(); |
1614 |
|
1615 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1616 |
bs1 = dinfo->bdrv; |
1617 |
if (bdrv_has_snapshot(bs1)) {
|
1618 |
ret = bdrv_snapshot_goto(bs1, name); |
1619 |
if (ret < 0) { |
1620 |
if (bs != bs1)
|
1621 |
monitor_printf(mon, "Warning: ");
|
1622 |
switch(ret) {
|
1623 |
case -ENOTSUP:
|
1624 |
monitor_printf(mon, |
1625 |
"Snapshots not supported on device '%s'\n",
|
1626 |
bdrv_get_device_name(bs1)); |
1627 |
break;
|
1628 |
case -ENOENT:
|
1629 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1630 |
"device '%s'\n",
|
1631 |
name, bdrv_get_device_name(bs1)); |
1632 |
break;
|
1633 |
default:
|
1634 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1635 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1636 |
break;
|
1637 |
} |
1638 |
/* fatal on snapshot block device */
|
1639 |
if (bs == bs1)
|
1640 |
return 0; |
1641 |
} |
1642 |
} |
1643 |
} |
1644 |
|
1645 |
/* Don't even try to load empty VM states */
|
1646 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1647 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1648 |
return -EINVAL;
|
1649 |
|
1650 |
/* restore the VM state */
|
1651 |
f = qemu_fopen_bdrv(bs, 0);
|
1652 |
if (!f) {
|
1653 |
monitor_printf(mon, "Could not open VM state file\n");
|
1654 |
return -EINVAL;
|
1655 |
} |
1656 |
ret = qemu_loadvm_state(f); |
1657 |
qemu_fclose(f); |
1658 |
if (ret < 0) { |
1659 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1660 |
return ret;
|
1661 |
} |
1662 |
return 0; |
1663 |
} |
1664 |
|
1665 |
void do_delvm(Monitor *mon, const QDict *qdict) |
1666 |
{ |
1667 |
DriveInfo *dinfo; |
1668 |
BlockDriverState *bs, *bs1; |
1669 |
int ret;
|
1670 |
const char *name = qdict_get_str(qdict, "name"); |
1671 |
|
1672 |
bs = get_bs_snapshots(); |
1673 |
if (!bs) {
|
1674 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1675 |
return;
|
1676 |
} |
1677 |
|
1678 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1679 |
bs1 = dinfo->bdrv; |
1680 |
if (bdrv_has_snapshot(bs1)) {
|
1681 |
ret = bdrv_snapshot_delete(bs1, name); |
1682 |
if (ret < 0) { |
1683 |
if (ret == -ENOTSUP)
|
1684 |
monitor_printf(mon, |
1685 |
"Snapshots not supported on device '%s'\n",
|
1686 |
bdrv_get_device_name(bs1)); |
1687 |
else
|
1688 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1689 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1690 |
} |
1691 |
} |
1692 |
} |
1693 |
} |
1694 |
|
1695 |
void do_info_snapshots(Monitor *mon)
|
1696 |
{ |
1697 |
DriveInfo *dinfo; |
1698 |
BlockDriverState *bs, *bs1; |
1699 |
QEMUSnapshotInfo *sn_tab, *sn; |
1700 |
int nb_sns, i;
|
1701 |
char buf[256]; |
1702 |
|
1703 |
bs = get_bs_snapshots(); |
1704 |
if (!bs) {
|
1705 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1706 |
return;
|
1707 |
} |
1708 |
monitor_printf(mon, "Snapshot devices:");
|
1709 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1710 |
bs1 = dinfo->bdrv; |
1711 |
if (bdrv_has_snapshot(bs1)) {
|
1712 |
if (bs == bs1)
|
1713 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1714 |
} |
1715 |
} |
1716 |
monitor_printf(mon, "\n");
|
1717 |
|
1718 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1719 |
if (nb_sns < 0) { |
1720 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1721 |
return;
|
1722 |
} |
1723 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1724 |
bdrv_get_device_name(bs)); |
1725 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1726 |
for(i = 0; i < nb_sns; i++) { |
1727 |
sn = &sn_tab[i]; |
1728 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1729 |
} |
1730 |
qemu_free(sn_tab); |
1731 |
} |