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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> |
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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> |
31 |
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/* Needed early for HOST_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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#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 HOST_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" |
93 |
|
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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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#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
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//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
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#define EXPERIMENTAL_MAGIC 0xf1f23f4f |
101 |
|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{ |
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uint32_t magic = EXPERIMENTAL_MAGIC; |
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uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
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/* FIXME: should we send a different packet (arp/rarp/ping)? */
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|
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memset(buf, 0, 64); |
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memset(buf, 0xff, 6); /* h_dst */ |
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memcpy(buf + 6, mac_addr, 6); /* h_src */ |
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memcpy(buf + 12, &proto, 2); /* h_proto */ |
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memcpy(buf + 14, &magic, 4); /* magic */ |
115 |
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return 64; /* len */ |
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} |
118 |
|
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static void qemu_announce_self_once(void *opaque) |
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{ |
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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[256];
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static int count = SELF_ANNOUNCE_ROUNDS; |
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QEMUTimer *timer = *(QEMUTimer **)opaque; |
127 |
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for (i = 0; i < MAX_NICS; i++) { |
129 |
if (!nd_table[i].used)
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continue;
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len = announce_self_create(buf, nd_table[i].macaddr); |
132 |
vlan = nd_table[i].vlan; |
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for(vc = vlan->first_client; vc != NULL; vc = vc->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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qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100);
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} else {
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qemu_del_timer(timer); |
141 |
qemu_free_timer(timer); |
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} |
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} |
144 |
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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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} |
151 |
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/***********************************************************/
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/* savevm/loadvm support */
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#define IO_BUF_SIZE 32768 |
156 |
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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]; |
171 |
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int has_error;
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}; |
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typedef struct QEMUFilePopen |
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{ |
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FILE *popen_file; |
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QEMUFile *file; |
179 |
} QEMUFilePopen; |
180 |
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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; |
186 |
|
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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); |
194 |
} while (len == -1 && socket_error() == EINTR); |
195 |
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if (len == -1) |
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len = -socket_error(); |
198 |
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return len;
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} |
201 |
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static int socket_close(void *opaque) |
203 |
{ |
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QEMUFileSocket *s = opaque; |
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qemu_free(s); |
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return 0; |
207 |
} |
208 |
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static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFilePopen *s = opaque; |
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return fwrite(buf, 1, size, s->popen_file); |
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} |
214 |
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static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFilePopen *s = opaque; |
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FILE *fp = s->popen_file; |
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int bytes;
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do {
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clearerr(fp); |
223 |
bytes = fread(buf, 1, size, fp);
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
225 |
return bytes;
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} |
227 |
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static int popen_close(void *opaque) |
229 |
{ |
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QEMUFilePopen *s = opaque; |
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pclose(s->popen_file); |
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qemu_free(s); |
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return 0; |
234 |
} |
235 |
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QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
237 |
{ |
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QEMUFilePopen *s; |
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if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
241 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL; |
243 |
} |
244 |
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s = qemu_mallocz(sizeof(QEMUFilePopen));
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s->popen_file = popen_file; |
248 |
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if(mode[0] == 'r') { |
250 |
s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL, NULL); |
251 |
} else {
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s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL, NULL); |
253 |
} |
254 |
return s->file;
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} |
256 |
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
258 |
{ |
259 |
FILE *popen_file; |
260 |
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popen_file = popen(command, mode); |
262 |
if(popen_file == NULL) { |
263 |
return NULL; |
264 |
} |
265 |
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return qemu_popen(popen_file, mode);
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} |
268 |
|
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int qemu_popen_fd(QEMUFile *f)
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{ |
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QEMUFilePopen *p; |
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int fd;
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p = (QEMUFilePopen *)f->opaque; |
275 |
fd = fileno(p->popen_file); |
276 |
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return fd;
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278 |
} |
279 |
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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; |
285 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
286 |
return s->file;
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} |
288 |
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typedef struct QEMUFileStdio |
290 |
{ |
291 |
FILE *outfile; |
292 |
} QEMUFileStdio; |
293 |
|
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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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{ |
297 |
QEMUFileStdio *s = opaque; |
298 |
fseek(s->outfile, pos, SEEK_SET); |
299 |
fwrite(buf, 1, size, s->outfile);
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return size;
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} |
302 |
|
303 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
304 |
{ |
305 |
QEMUFileStdio *s = opaque; |
306 |
fseek(s->outfile, pos, SEEK_SET); |
307 |
return fread(buf, 1, size, s->outfile); |
308 |
} |
309 |
|
310 |
static int file_close(void *opaque) |
311 |
{ |
312 |
QEMUFileStdio *s = opaque; |
313 |
fclose(s->outfile); |
314 |
qemu_free(s); |
315 |
return 0; |
316 |
} |
317 |
|
318 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
319 |
{ |
320 |
QEMUFileStdio *s; |
321 |
|
322 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
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323 |
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s->outfile = fopen(filename, mode); |
325 |
if (!s->outfile)
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goto fail;
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327 |
|
328 |
if (!strcmp(mode, "wb")) |
329 |
return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL, NULL); |
330 |
else if (!strcmp(mode, "rb")) |
331 |
return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL, NULL); |
332 |
|
333 |
fail:
|
334 |
if (s->outfile)
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335 |
fclose(s->outfile); |
336 |
qemu_free(s); |
337 |
return NULL; |
338 |
} |
339 |
|
340 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
341 |
int64_t pos, int size)
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342 |
{ |
343 |
bdrv_save_vmstate(opaque, buf, pos, size); |
344 |
return size;
|
345 |
} |
346 |
|
347 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
348 |
{ |
349 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
350 |
} |
351 |
|
352 |
static int bdrv_fclose(void *opaque) |
353 |
{ |
354 |
return 0; |
355 |
} |
356 |
|
357 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
358 |
{ |
359 |
if (is_writable)
|
360 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
361 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
362 |
} |
363 |
|
364 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
365 |
QEMUFileGetBufferFunc *get_buffer, |
366 |
QEMUFileCloseFunc *close, |
367 |
QEMUFileRateLimit *rate_limit, |
368 |
QEMUFileSetRateLimit *set_rate_limit) |
369 |
{ |
370 |
QEMUFile *f; |
371 |
|
372 |
f = qemu_mallocz(sizeof(QEMUFile));
|
373 |
|
374 |
f->opaque = opaque; |
375 |
f->put_buffer = put_buffer; |
376 |
f->get_buffer = get_buffer; |
377 |
f->close = close; |
378 |
f->rate_limit = rate_limit; |
379 |
f->set_rate_limit = set_rate_limit; |
380 |
f->is_write = 0;
|
381 |
|
382 |
return f;
|
383 |
} |
384 |
|
385 |
int qemu_file_has_error(QEMUFile *f)
|
386 |
{ |
387 |
return f->has_error;
|
388 |
} |
389 |
|
390 |
void qemu_file_set_error(QEMUFile *f)
|
391 |
{ |
392 |
f->has_error = 1;
|
393 |
} |
394 |
|
395 |
void qemu_fflush(QEMUFile *f)
|
396 |
{ |
397 |
if (!f->put_buffer)
|
398 |
return;
|
399 |
|
400 |
if (f->is_write && f->buf_index > 0) { |
401 |
int len;
|
402 |
|
403 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
404 |
if (len > 0) |
405 |
f->buf_offset += f->buf_index; |
406 |
else
|
407 |
f->has_error = 1;
|
408 |
f->buf_index = 0;
|
409 |
} |
410 |
} |
411 |
|
412 |
static void qemu_fill_buffer(QEMUFile *f) |
413 |
{ |
414 |
int len;
|
415 |
|
416 |
if (!f->get_buffer)
|
417 |
return;
|
418 |
|
419 |
if (f->is_write)
|
420 |
abort(); |
421 |
|
422 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
423 |
if (len > 0) { |
424 |
f->buf_index = 0;
|
425 |
f->buf_size = len; |
426 |
f->buf_offset += len; |
427 |
} else if (len != -EAGAIN) |
428 |
f->has_error = 1;
|
429 |
} |
430 |
|
431 |
int qemu_fclose(QEMUFile *f)
|
432 |
{ |
433 |
int ret = 0; |
434 |
qemu_fflush(f); |
435 |
if (f->close)
|
436 |
ret = f->close(f->opaque); |
437 |
qemu_free(f); |
438 |
return ret;
|
439 |
} |
440 |
|
441 |
void qemu_file_put_notify(QEMUFile *f)
|
442 |
{ |
443 |
f->put_buffer(f->opaque, NULL, 0, 0); |
444 |
} |
445 |
|
446 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
447 |
{ |
448 |
int l;
|
449 |
|
450 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
451 |
fprintf(stderr, |
452 |
"Attempted to write to buffer while read buffer is not empty\n");
|
453 |
abort(); |
454 |
} |
455 |
|
456 |
while (!f->has_error && size > 0) { |
457 |
l = IO_BUF_SIZE - f->buf_index; |
458 |
if (l > size)
|
459 |
l = size; |
460 |
memcpy(f->buf + f->buf_index, buf, l); |
461 |
f->is_write = 1;
|
462 |
f->buf_index += l; |
463 |
buf += l; |
464 |
size -= l; |
465 |
if (f->buf_index >= IO_BUF_SIZE)
|
466 |
qemu_fflush(f); |
467 |
} |
468 |
} |
469 |
|
470 |
void qemu_put_byte(QEMUFile *f, int v) |
471 |
{ |
472 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
473 |
fprintf(stderr, |
474 |
"Attempted to write to buffer while read buffer is not empty\n");
|
475 |
abort(); |
476 |
} |
477 |
|
478 |
f->buf[f->buf_index++] = v; |
479 |
f->is_write = 1;
|
480 |
if (f->buf_index >= IO_BUF_SIZE)
|
481 |
qemu_fflush(f); |
482 |
} |
483 |
|
484 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
485 |
{ |
486 |
int size, l;
|
487 |
|
488 |
if (f->is_write)
|
489 |
abort(); |
490 |
|
491 |
size = size1; |
492 |
while (size > 0) { |
493 |
l = f->buf_size - f->buf_index; |
494 |
if (l == 0) { |
495 |
qemu_fill_buffer(f); |
496 |
l = f->buf_size - f->buf_index; |
497 |
if (l == 0) |
498 |
break;
|
499 |
} |
500 |
if (l > size)
|
501 |
l = size; |
502 |
memcpy(buf, f->buf + f->buf_index, l); |
503 |
f->buf_index += l; |
504 |
buf += l; |
505 |
size -= l; |
506 |
} |
507 |
return size1 - size;
|
508 |
} |
509 |
|
510 |
int qemu_get_byte(QEMUFile *f)
|
511 |
{ |
512 |
if (f->is_write)
|
513 |
abort(); |
514 |
|
515 |
if (f->buf_index >= f->buf_size) {
|
516 |
qemu_fill_buffer(f); |
517 |
if (f->buf_index >= f->buf_size)
|
518 |
return 0; |
519 |
} |
520 |
return f->buf[f->buf_index++];
|
521 |
} |
522 |
|
523 |
int64_t qemu_ftell(QEMUFile *f) |
524 |
{ |
525 |
return f->buf_offset - f->buf_size + f->buf_index;
|
526 |
} |
527 |
|
528 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
529 |
{ |
530 |
if (whence == SEEK_SET) {
|
531 |
/* nothing to do */
|
532 |
} else if (whence == SEEK_CUR) { |
533 |
pos += qemu_ftell(f); |
534 |
} else {
|
535 |
/* SEEK_END not supported */
|
536 |
return -1; |
537 |
} |
538 |
if (f->put_buffer) {
|
539 |
qemu_fflush(f); |
540 |
f->buf_offset = pos; |
541 |
} else {
|
542 |
f->buf_offset = pos; |
543 |
f->buf_index = 0;
|
544 |
f->buf_size = 0;
|
545 |
} |
546 |
return pos;
|
547 |
} |
548 |
|
549 |
int qemu_file_rate_limit(QEMUFile *f)
|
550 |
{ |
551 |
if (f->rate_limit)
|
552 |
return f->rate_limit(f->opaque);
|
553 |
|
554 |
return 0; |
555 |
} |
556 |
|
557 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
558 |
{ |
559 |
if (f->set_rate_limit)
|
560 |
return f->set_rate_limit(f->opaque, new_rate);
|
561 |
|
562 |
return 0; |
563 |
} |
564 |
|
565 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
566 |
{ |
567 |
qemu_put_byte(f, v >> 8);
|
568 |
qemu_put_byte(f, v); |
569 |
} |
570 |
|
571 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
572 |
{ |
573 |
qemu_put_byte(f, v >> 24);
|
574 |
qemu_put_byte(f, v >> 16);
|
575 |
qemu_put_byte(f, v >> 8);
|
576 |
qemu_put_byte(f, v); |
577 |
} |
578 |
|
579 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
580 |
{ |
581 |
qemu_put_be32(f, v >> 32);
|
582 |
qemu_put_be32(f, v); |
583 |
} |
584 |
|
585 |
unsigned int qemu_get_be16(QEMUFile *f) |
586 |
{ |
587 |
unsigned int v; |
588 |
v = qemu_get_byte(f) << 8;
|
589 |
v |= qemu_get_byte(f); |
590 |
return v;
|
591 |
} |
592 |
|
593 |
unsigned int qemu_get_be32(QEMUFile *f) |
594 |
{ |
595 |
unsigned int v; |
596 |
v = qemu_get_byte(f) << 24;
|
597 |
v |= qemu_get_byte(f) << 16;
|
598 |
v |= qemu_get_byte(f) << 8;
|
599 |
v |= qemu_get_byte(f); |
600 |
return v;
|
601 |
} |
602 |
|
603 |
uint64_t qemu_get_be64(QEMUFile *f) |
604 |
{ |
605 |
uint64_t v; |
606 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
607 |
v |= qemu_get_be32(f); |
608 |
return v;
|
609 |
} |
610 |
|
611 |
typedef struct SaveStateEntry { |
612 |
char idstr[256]; |
613 |
int instance_id;
|
614 |
int version_id;
|
615 |
int section_id;
|
616 |
SaveLiveStateHandler *save_live_state; |
617 |
SaveStateHandler *save_state; |
618 |
LoadStateHandler *load_state; |
619 |
void *opaque;
|
620 |
struct SaveStateEntry *next;
|
621 |
} SaveStateEntry; |
622 |
|
623 |
static SaveStateEntry *first_se;
|
624 |
|
625 |
/* TODO: Individual devices generally have very little idea about the rest
|
626 |
of the system, so instance_id should be removed/replaced.
|
627 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
628 |
distinguishing id for all instances of your device class. */
|
629 |
int register_savevm_live(const char *idstr, |
630 |
int instance_id,
|
631 |
int version_id,
|
632 |
SaveLiveStateHandler *save_live_state, |
633 |
SaveStateHandler *save_state, |
634 |
LoadStateHandler *load_state, |
635 |
void *opaque)
|
636 |
{ |
637 |
SaveStateEntry *se, **pse; |
638 |
static int global_section_id; |
639 |
|
640 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
641 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
642 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
643 |
se->version_id = version_id; |
644 |
se->section_id = global_section_id++; |
645 |
se->save_live_state = save_live_state; |
646 |
se->save_state = save_state; |
647 |
se->load_state = load_state; |
648 |
se->opaque = opaque; |
649 |
se->next = NULL;
|
650 |
|
651 |
/* add at the end of list */
|
652 |
pse = &first_se; |
653 |
while (*pse != NULL) { |
654 |
if (instance_id == -1 |
655 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
656 |
&& se->instance_id <= (*pse)->instance_id) |
657 |
se->instance_id = (*pse)->instance_id + 1;
|
658 |
pse = &(*pse)->next; |
659 |
} |
660 |
*pse = se; |
661 |
return 0; |
662 |
} |
663 |
|
664 |
int register_savevm(const char *idstr, |
665 |
int instance_id,
|
666 |
int version_id,
|
667 |
SaveStateHandler *save_state, |
668 |
LoadStateHandler *load_state, |
669 |
void *opaque)
|
670 |
{ |
671 |
return register_savevm_live(idstr, instance_id, version_id,
|
672 |
NULL, save_state, load_state, opaque);
|
673 |
} |
674 |
|
675 |
void unregister_savevm(const char *idstr, void *opaque) |
676 |
{ |
677 |
SaveStateEntry **pse; |
678 |
|
679 |
pse = &first_se; |
680 |
while (*pse != NULL) { |
681 |
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
682 |
SaveStateEntry *next = (*pse)->next; |
683 |
qemu_free(*pse); |
684 |
*pse = next; |
685 |
continue;
|
686 |
} |
687 |
pse = &(*pse)->next; |
688 |
} |
689 |
} |
690 |
|
691 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
692 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
693 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
694 |
|
695 |
#define QEMU_VM_EOF 0x00 |
696 |
#define QEMU_VM_SECTION_START 0x01 |
697 |
#define QEMU_VM_SECTION_PART 0x02 |
698 |
#define QEMU_VM_SECTION_END 0x03 |
699 |
#define QEMU_VM_SECTION_FULL 0x04 |
700 |
|
701 |
int qemu_savevm_state_begin(QEMUFile *f)
|
702 |
{ |
703 |
SaveStateEntry *se; |
704 |
|
705 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
706 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
707 |
|
708 |
for (se = first_se; se != NULL; se = se->next) { |
709 |
int len;
|
710 |
|
711 |
if (se->save_live_state == NULL) |
712 |
continue;
|
713 |
|
714 |
/* Section type */
|
715 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
716 |
qemu_put_be32(f, se->section_id); |
717 |
|
718 |
/* ID string */
|
719 |
len = strlen(se->idstr); |
720 |
qemu_put_byte(f, len); |
721 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
722 |
|
723 |
qemu_put_be32(f, se->instance_id); |
724 |
qemu_put_be32(f, se->version_id); |
725 |
|
726 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
727 |
} |
728 |
|
729 |
if (qemu_file_has_error(f))
|
730 |
return -EIO;
|
731 |
|
732 |
return 0; |
733 |
} |
734 |
|
735 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
736 |
{ |
737 |
SaveStateEntry *se; |
738 |
int ret = 1; |
739 |
|
740 |
for (se = first_se; se != NULL; se = se->next) { |
741 |
if (se->save_live_state == NULL) |
742 |
continue;
|
743 |
|
744 |
/* Section type */
|
745 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
746 |
qemu_put_be32(f, se->section_id); |
747 |
|
748 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
749 |
} |
750 |
|
751 |
if (ret)
|
752 |
return 1; |
753 |
|
754 |
if (qemu_file_has_error(f))
|
755 |
return -EIO;
|
756 |
|
757 |
return 0; |
758 |
} |
759 |
|
760 |
int qemu_savevm_state_complete(QEMUFile *f)
|
761 |
{ |
762 |
SaveStateEntry *se; |
763 |
|
764 |
for (se = first_se; se != NULL; se = se->next) { |
765 |
if (se->save_live_state == NULL) |
766 |
continue;
|
767 |
|
768 |
/* Section type */
|
769 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
770 |
qemu_put_be32(f, se->section_id); |
771 |
|
772 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
773 |
} |
774 |
|
775 |
for(se = first_se; se != NULL; se = se->next) { |
776 |
int len;
|
777 |
|
778 |
if (se->save_state == NULL) |
779 |
continue;
|
780 |
|
781 |
/* Section type */
|
782 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
783 |
qemu_put_be32(f, se->section_id); |
784 |
|
785 |
/* ID string */
|
786 |
len = strlen(se->idstr); |
787 |
qemu_put_byte(f, len); |
788 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
789 |
|
790 |
qemu_put_be32(f, se->instance_id); |
791 |
qemu_put_be32(f, se->version_id); |
792 |
|
793 |
se->save_state(f, se->opaque); |
794 |
} |
795 |
|
796 |
qemu_put_byte(f, QEMU_VM_EOF); |
797 |
|
798 |
if (qemu_file_has_error(f))
|
799 |
return -EIO;
|
800 |
|
801 |
return 0; |
802 |
} |
803 |
|
804 |
int qemu_savevm_state(QEMUFile *f)
|
805 |
{ |
806 |
int saved_vm_running;
|
807 |
int ret;
|
808 |
|
809 |
saved_vm_running = vm_running; |
810 |
vm_stop(0);
|
811 |
|
812 |
bdrv_flush_all(); |
813 |
|
814 |
ret = qemu_savevm_state_begin(f); |
815 |
if (ret < 0) |
816 |
goto out;
|
817 |
|
818 |
do {
|
819 |
ret = qemu_savevm_state_iterate(f); |
820 |
if (ret < 0) |
821 |
goto out;
|
822 |
} while (ret == 0); |
823 |
|
824 |
ret = qemu_savevm_state_complete(f); |
825 |
|
826 |
out:
|
827 |
if (qemu_file_has_error(f))
|
828 |
ret = -EIO; |
829 |
|
830 |
if (!ret && saved_vm_running)
|
831 |
vm_start(); |
832 |
|
833 |
return ret;
|
834 |
} |
835 |
|
836 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
837 |
{ |
838 |
SaveStateEntry *se; |
839 |
|
840 |
for(se = first_se; se != NULL; se = se->next) { |
841 |
if (!strcmp(se->idstr, idstr) &&
|
842 |
instance_id == se->instance_id) |
843 |
return se;
|
844 |
} |
845 |
return NULL; |
846 |
} |
847 |
|
848 |
typedef struct LoadStateEntry { |
849 |
SaveStateEntry *se; |
850 |
int section_id;
|
851 |
int version_id;
|
852 |
struct LoadStateEntry *next;
|
853 |
} LoadStateEntry; |
854 |
|
855 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
856 |
{ |
857 |
SaveStateEntry *se; |
858 |
int len, ret, instance_id, record_len, version_id;
|
859 |
int64_t total_len, end_pos, cur_pos; |
860 |
char idstr[256]; |
861 |
|
862 |
total_len = qemu_get_be64(f); |
863 |
end_pos = total_len + qemu_ftell(f); |
864 |
for(;;) {
|
865 |
if (qemu_ftell(f) >= end_pos)
|
866 |
break;
|
867 |
len = qemu_get_byte(f); |
868 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
869 |
idstr[len] = '\0';
|
870 |
instance_id = qemu_get_be32(f); |
871 |
version_id = qemu_get_be32(f); |
872 |
record_len = qemu_get_be32(f); |
873 |
cur_pos = qemu_ftell(f); |
874 |
se = find_se(idstr, instance_id); |
875 |
if (!se) {
|
876 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
877 |
instance_id, idstr); |
878 |
} else {
|
879 |
ret = se->load_state(f, se->opaque, version_id); |
880 |
if (ret < 0) { |
881 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
882 |
instance_id, idstr); |
883 |
return ret;
|
884 |
} |
885 |
} |
886 |
/* always seek to exact end of record */
|
887 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
888 |
} |
889 |
|
890 |
if (qemu_file_has_error(f))
|
891 |
return -EIO;
|
892 |
|
893 |
return 0; |
894 |
} |
895 |
|
896 |
int qemu_loadvm_state(QEMUFile *f)
|
897 |
{ |
898 |
LoadStateEntry *first_le = NULL;
|
899 |
uint8_t section_type; |
900 |
unsigned int v; |
901 |
int ret;
|
902 |
|
903 |
v = qemu_get_be32(f); |
904 |
if (v != QEMU_VM_FILE_MAGIC)
|
905 |
return -EINVAL;
|
906 |
|
907 |
v = qemu_get_be32(f); |
908 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
909 |
return qemu_loadvm_state_v2(f);
|
910 |
if (v != QEMU_VM_FILE_VERSION)
|
911 |
return -ENOTSUP;
|
912 |
|
913 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
914 |
uint32_t instance_id, version_id, section_id; |
915 |
LoadStateEntry *le; |
916 |
SaveStateEntry *se; |
917 |
char idstr[257]; |
918 |
int len;
|
919 |
|
920 |
switch (section_type) {
|
921 |
case QEMU_VM_SECTION_START:
|
922 |
case QEMU_VM_SECTION_FULL:
|
923 |
/* Read section start */
|
924 |
section_id = qemu_get_be32(f); |
925 |
len = qemu_get_byte(f); |
926 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
927 |
idstr[len] = 0;
|
928 |
instance_id = qemu_get_be32(f); |
929 |
version_id = qemu_get_be32(f); |
930 |
|
931 |
/* Find savevm section */
|
932 |
se = find_se(idstr, instance_id); |
933 |
if (se == NULL) { |
934 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
935 |
ret = -EINVAL; |
936 |
goto out;
|
937 |
} |
938 |
|
939 |
/* Validate version */
|
940 |
if (version_id > se->version_id) {
|
941 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
942 |
version_id, idstr, se->version_id); |
943 |
ret = -EINVAL; |
944 |
goto out;
|
945 |
} |
946 |
|
947 |
/* Add entry */
|
948 |
le = qemu_mallocz(sizeof(*le));
|
949 |
|
950 |
le->se = se; |
951 |
le->section_id = section_id; |
952 |
le->version_id = version_id; |
953 |
le->next = first_le; |
954 |
first_le = le; |
955 |
|
956 |
le->se->load_state(f, le->se->opaque, le->version_id); |
957 |
break;
|
958 |
case QEMU_VM_SECTION_PART:
|
959 |
case QEMU_VM_SECTION_END:
|
960 |
section_id = qemu_get_be32(f); |
961 |
|
962 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
963 |
if (le == NULL) { |
964 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
965 |
ret = -EINVAL; |
966 |
goto out;
|
967 |
} |
968 |
|
969 |
le->se->load_state(f, le->se->opaque, le->version_id); |
970 |
break;
|
971 |
default:
|
972 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
973 |
ret = -EINVAL; |
974 |
goto out;
|
975 |
} |
976 |
} |
977 |
|
978 |
ret = 0;
|
979 |
|
980 |
out:
|
981 |
while (first_le) {
|
982 |
LoadStateEntry *le = first_le; |
983 |
first_le = first_le->next; |
984 |
qemu_free(le); |
985 |
} |
986 |
|
987 |
if (qemu_file_has_error(f))
|
988 |
ret = -EIO; |
989 |
|
990 |
return ret;
|
991 |
} |
992 |
|
993 |
/* device can contain snapshots */
|
994 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
995 |
{ |
996 |
return (bs &&
|
997 |
!bdrv_is_removable(bs) && |
998 |
!bdrv_is_read_only(bs)); |
999 |
} |
1000 |
|
1001 |
/* device must be snapshots in order to have a reliable snapshot */
|
1002 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1003 |
{ |
1004 |
return (bs &&
|
1005 |
!bdrv_is_removable(bs) && |
1006 |
!bdrv_is_read_only(bs)); |
1007 |
} |
1008 |
|
1009 |
static BlockDriverState *get_bs_snapshots(void) |
1010 |
{ |
1011 |
BlockDriverState *bs; |
1012 |
int i;
|
1013 |
|
1014 |
if (bs_snapshots)
|
1015 |
return bs_snapshots;
|
1016 |
for(i = 0; i <= nb_drives; i++) { |
1017 |
bs = drives_table[i].bdrv; |
1018 |
if (bdrv_can_snapshot(bs))
|
1019 |
goto ok;
|
1020 |
} |
1021 |
return NULL; |
1022 |
ok:
|
1023 |
bs_snapshots = bs; |
1024 |
return bs;
|
1025 |
} |
1026 |
|
1027 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1028 |
const char *name) |
1029 |
{ |
1030 |
QEMUSnapshotInfo *sn_tab, *sn; |
1031 |
int nb_sns, i, ret;
|
1032 |
|
1033 |
ret = -ENOENT; |
1034 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1035 |
if (nb_sns < 0) |
1036 |
return ret;
|
1037 |
for(i = 0; i < nb_sns; i++) { |
1038 |
sn = &sn_tab[i]; |
1039 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1040 |
*sn_info = *sn; |
1041 |
ret = 0;
|
1042 |
break;
|
1043 |
} |
1044 |
} |
1045 |
qemu_free(sn_tab); |
1046 |
return ret;
|
1047 |
} |
1048 |
|
1049 |
void do_savevm(Monitor *mon, const char *name) |
1050 |
{ |
1051 |
BlockDriverState *bs, *bs1; |
1052 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1053 |
int must_delete, ret, i;
|
1054 |
QEMUFile *f; |
1055 |
int saved_vm_running;
|
1056 |
uint32_t vm_state_size; |
1057 |
#ifdef _WIN32
|
1058 |
struct _timeb tb;
|
1059 |
#else
|
1060 |
struct timeval tv;
|
1061 |
#endif
|
1062 |
|
1063 |
bs = get_bs_snapshots(); |
1064 |
if (!bs) {
|
1065 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1066 |
return;
|
1067 |
} |
1068 |
|
1069 |
/* ??? Should this occur after vm_stop? */
|
1070 |
qemu_aio_flush(); |
1071 |
|
1072 |
saved_vm_running = vm_running; |
1073 |
vm_stop(0);
|
1074 |
|
1075 |
must_delete = 0;
|
1076 |
if (name) {
|
1077 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1078 |
if (ret >= 0) { |
1079 |
must_delete = 1;
|
1080 |
} |
1081 |
} |
1082 |
memset(sn, 0, sizeof(*sn)); |
1083 |
if (must_delete) {
|
1084 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1085 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1086 |
} else {
|
1087 |
if (name)
|
1088 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1089 |
} |
1090 |
|
1091 |
/* fill auxiliary fields */
|
1092 |
#ifdef _WIN32
|
1093 |
_ftime(&tb); |
1094 |
sn->date_sec = tb.time; |
1095 |
sn->date_nsec = tb.millitm * 1000000;
|
1096 |
#else
|
1097 |
gettimeofday(&tv, NULL);
|
1098 |
sn->date_sec = tv.tv_sec; |
1099 |
sn->date_nsec = tv.tv_usec * 1000;
|
1100 |
#endif
|
1101 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1102 |
|
1103 |
/* save the VM state */
|
1104 |
f = qemu_fopen_bdrv(bs, 1);
|
1105 |
if (!f) {
|
1106 |
monitor_printf(mon, "Could not open VM state file\n");
|
1107 |
goto the_end;
|
1108 |
} |
1109 |
ret = qemu_savevm_state(f); |
1110 |
vm_state_size = qemu_ftell(f); |
1111 |
qemu_fclose(f); |
1112 |
if (ret < 0) { |
1113 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1114 |
goto the_end;
|
1115 |
} |
1116 |
|
1117 |
/* create the snapshots */
|
1118 |
|
1119 |
for(i = 0; i < nb_drives; i++) { |
1120 |
bs1 = drives_table[i].bdrv; |
1121 |
if (bdrv_has_snapshot(bs1)) {
|
1122 |
if (must_delete) {
|
1123 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1124 |
if (ret < 0) { |
1125 |
monitor_printf(mon, |
1126 |
"Error while deleting snapshot on '%s'\n",
|
1127 |
bdrv_get_device_name(bs1)); |
1128 |
} |
1129 |
} |
1130 |
/* Write VM state size only to the image that contains the state */
|
1131 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1132 |
ret = bdrv_snapshot_create(bs1, sn); |
1133 |
if (ret < 0) { |
1134 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1135 |
bdrv_get_device_name(bs1)); |
1136 |
} |
1137 |
} |
1138 |
} |
1139 |
|
1140 |
the_end:
|
1141 |
if (saved_vm_running)
|
1142 |
vm_start(); |
1143 |
} |
1144 |
|
1145 |
void do_loadvm(Monitor *mon, const char *name) |
1146 |
{ |
1147 |
BlockDriverState *bs, *bs1; |
1148 |
QEMUSnapshotInfo sn; |
1149 |
QEMUFile *f; |
1150 |
int i, ret;
|
1151 |
int saved_vm_running;
|
1152 |
|
1153 |
bs = get_bs_snapshots(); |
1154 |
if (!bs) {
|
1155 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1156 |
return;
|
1157 |
} |
1158 |
|
1159 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1160 |
qemu_aio_flush(); |
1161 |
|
1162 |
saved_vm_running = vm_running; |
1163 |
vm_stop(0);
|
1164 |
|
1165 |
for(i = 0; i <= nb_drives; i++) { |
1166 |
bs1 = drives_table[i].bdrv; |
1167 |
if (bdrv_has_snapshot(bs1)) {
|
1168 |
ret = bdrv_snapshot_goto(bs1, name); |
1169 |
if (ret < 0) { |
1170 |
if (bs != bs1)
|
1171 |
monitor_printf(mon, "Warning: ");
|
1172 |
switch(ret) {
|
1173 |
case -ENOTSUP:
|
1174 |
monitor_printf(mon, |
1175 |
"Snapshots not supported on device '%s'\n",
|
1176 |
bdrv_get_device_name(bs1)); |
1177 |
break;
|
1178 |
case -ENOENT:
|
1179 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1180 |
"device '%s'\n",
|
1181 |
name, bdrv_get_device_name(bs1)); |
1182 |
break;
|
1183 |
default:
|
1184 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1185 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1186 |
break;
|
1187 |
} |
1188 |
/* fatal on snapshot block device */
|
1189 |
if (bs == bs1)
|
1190 |
goto the_end;
|
1191 |
} |
1192 |
} |
1193 |
} |
1194 |
|
1195 |
/* Don't even try to load empty VM states */
|
1196 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1197 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1198 |
goto the_end;
|
1199 |
|
1200 |
/* restore the VM state */
|
1201 |
f = qemu_fopen_bdrv(bs, 0);
|
1202 |
if (!f) {
|
1203 |
monitor_printf(mon, "Could not open VM state file\n");
|
1204 |
goto the_end;
|
1205 |
} |
1206 |
ret = qemu_loadvm_state(f); |
1207 |
qemu_fclose(f); |
1208 |
if (ret < 0) { |
1209 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1210 |
} |
1211 |
the_end:
|
1212 |
if (saved_vm_running)
|
1213 |
vm_start(); |
1214 |
} |
1215 |
|
1216 |
void do_delvm(Monitor *mon, const char *name) |
1217 |
{ |
1218 |
BlockDriverState *bs, *bs1; |
1219 |
int i, ret;
|
1220 |
|
1221 |
bs = get_bs_snapshots(); |
1222 |
if (!bs) {
|
1223 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1224 |
return;
|
1225 |
} |
1226 |
|
1227 |
for(i = 0; i <= nb_drives; i++) { |
1228 |
bs1 = drives_table[i].bdrv; |
1229 |
if (bdrv_has_snapshot(bs1)) {
|
1230 |
ret = bdrv_snapshot_delete(bs1, name); |
1231 |
if (ret < 0) { |
1232 |
if (ret == -ENOTSUP)
|
1233 |
monitor_printf(mon, |
1234 |
"Snapshots not supported on device '%s'\n",
|
1235 |
bdrv_get_device_name(bs1)); |
1236 |
else
|
1237 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1238 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1239 |
} |
1240 |
} |
1241 |
} |
1242 |
} |
1243 |
|
1244 |
void do_info_snapshots(Monitor *mon)
|
1245 |
{ |
1246 |
BlockDriverState *bs, *bs1; |
1247 |
QEMUSnapshotInfo *sn_tab, *sn; |
1248 |
int nb_sns, i;
|
1249 |
char buf[256]; |
1250 |
|
1251 |
bs = get_bs_snapshots(); |
1252 |
if (!bs) {
|
1253 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1254 |
return;
|
1255 |
} |
1256 |
monitor_printf(mon, "Snapshot devices:");
|
1257 |
for(i = 0; i <= nb_drives; i++) { |
1258 |
bs1 = drives_table[i].bdrv; |
1259 |
if (bdrv_has_snapshot(bs1)) {
|
1260 |
if (bs == bs1)
|
1261 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1262 |
} |
1263 |
} |
1264 |
monitor_printf(mon, "\n");
|
1265 |
|
1266 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1267 |
if (nb_sns < 0) { |
1268 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1269 |
return;
|
1270 |
} |
1271 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1272 |
bdrv_get_device_name(bs)); |
1273 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1274 |
for(i = 0; i < nb_sns; i++) { |
1275 |
sn = &sn_tab[i]; |
1276 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1277 |
} |
1278 |
qemu_free(sn_tab); |
1279 |
} |