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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> |
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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.h" |
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|
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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> |
55 |
#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> |
64 |
#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" |
88 |
#include "qemu-char.h" |
89 |
#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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|
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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) |
120 |
{ |
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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); |
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qemu_free_timer(timer); |
142 |
} |
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} |
144 |
|
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void qemu_announce_self(void) |
146 |
{ |
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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 QEMUFileStdio |
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{ |
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FILE *stdio_file; |
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QEMUFile *file; |
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} QEMUFileStdio; |
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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|
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do {
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len = recv(s->fd, (void *)buf, size, 0); |
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} while (len == -1 && socket_error() == EINTR); |
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if (len == -1) |
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len = -socket_error(); |
198 |
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return len;
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} |
201 |
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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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} |
208 |
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static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileStdio *s = opaque; |
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return fwrite(buf, 1, size, s->stdio_file); |
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} |
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileStdio *s = opaque; |
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FILE *fp = s->stdio_file; |
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int bytes;
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do {
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clearerr(fp); |
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 stdio_pclose(void *opaque) |
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{ |
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QEMUFileStdio *s = opaque; |
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pclose(s->stdio_file); |
232 |
qemu_free(s); |
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return 0; |
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} |
235 |
|
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static int stdio_fclose(void *opaque) |
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{ |
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QEMUFileStdio *s = opaque; |
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fclose(s->stdio_file); |
240 |
qemu_free(s); |
241 |
return 0; |
242 |
} |
243 |
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QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
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{ |
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QEMUFileStdio *s; |
247 |
|
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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; |
251 |
} |
252 |
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = stdio_file; |
256 |
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if(mode[0] == 'r') { |
258 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL); |
259 |
} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL); |
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} |
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return s->file;
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} |
264 |
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
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{ |
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FILE *popen_file; |
268 |
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popen_file = popen(command, mode); |
270 |
if(popen_file == NULL) { |
271 |
return NULL; |
272 |
} |
273 |
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274 |
return qemu_popen(popen_file, mode);
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} |
276 |
|
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int qemu_stdio_fd(QEMUFile *f)
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{ |
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QEMUFileStdio *p; |
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int fd;
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281 |
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p = (QEMUFileStdio *)f->opaque; |
283 |
fd = fileno(p->stdio_file); |
284 |
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return fd;
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} |
287 |
|
288 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
289 |
{ |
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QEMUFileStdio *s; |
291 |
|
292 |
if (mode == NULL || |
293 |
(mode[0] != 'r' && mode[0] != 'w') || |
294 |
mode[1] != 'b' || mode[2] != 0) { |
295 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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return NULL; |
297 |
} |
298 |
|
299 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
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300 |
s->stdio_file = fdopen(fd, mode); |
301 |
if (!s->stdio_file)
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goto fail;
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303 |
|
304 |
if(mode[0] == 'r') { |
305 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL); |
306 |
} else {
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307 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL); |
308 |
} |
309 |
return s->file;
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310 |
|
311 |
fail:
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312 |
qemu_free(s); |
313 |
return NULL; |
314 |
} |
315 |
|
316 |
QEMUFile *qemu_fopen_socket(int fd)
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317 |
{ |
318 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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319 |
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320 |
s->fd = fd; |
321 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
322 |
return s->file;
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323 |
} |
324 |
|
325 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
326 |
int64_t pos, int size)
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327 |
{ |
328 |
QEMUFileStdio *s = opaque; |
329 |
fseek(s->stdio_file, pos, SEEK_SET); |
330 |
fwrite(buf, 1, size, s->stdio_file);
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331 |
return size;
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332 |
} |
333 |
|
334 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
335 |
{ |
336 |
QEMUFileStdio *s = opaque; |
337 |
fseek(s->stdio_file, pos, SEEK_SET); |
338 |
return fread(buf, 1, size, s->stdio_file); |
339 |
} |
340 |
|
341 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
342 |
{ |
343 |
QEMUFileStdio *s; |
344 |
|
345 |
if (mode == NULL || |
346 |
(mode[0] != 'r' && mode[0] != 'w') || |
347 |
mode[1] != 'b' || mode[2] != 0) { |
348 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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349 |
return NULL; |
350 |
} |
351 |
|
352 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
353 |
|
354 |
s->stdio_file = fopen(filename, mode); |
355 |
if (!s->stdio_file)
|
356 |
goto fail;
|
357 |
|
358 |
if(mode[0] == 'w') { |
359 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL); |
360 |
} else {
|
361 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL); |
362 |
} |
363 |
return s->file;
|
364 |
fail:
|
365 |
qemu_free(s); |
366 |
return NULL; |
367 |
} |
368 |
|
369 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
370 |
int64_t pos, int size)
|
371 |
{ |
372 |
bdrv_save_vmstate(opaque, buf, pos, size); |
373 |
return size;
|
374 |
} |
375 |
|
376 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
377 |
{ |
378 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
379 |
} |
380 |
|
381 |
static int bdrv_fclose(void *opaque) |
382 |
{ |
383 |
return 0; |
384 |
} |
385 |
|
386 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
387 |
{ |
388 |
if (is_writable)
|
389 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
390 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
391 |
} |
392 |
|
393 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
394 |
QEMUFileGetBufferFunc *get_buffer, |
395 |
QEMUFileCloseFunc *close, |
396 |
QEMUFileRateLimit *rate_limit, |
397 |
QEMUFileSetRateLimit *set_rate_limit) |
398 |
{ |
399 |
QEMUFile *f; |
400 |
|
401 |
f = qemu_mallocz(sizeof(QEMUFile));
|
402 |
|
403 |
f->opaque = opaque; |
404 |
f->put_buffer = put_buffer; |
405 |
f->get_buffer = get_buffer; |
406 |
f->close = close; |
407 |
f->rate_limit = rate_limit; |
408 |
f->set_rate_limit = set_rate_limit; |
409 |
f->is_write = 0;
|
410 |
|
411 |
return f;
|
412 |
} |
413 |
|
414 |
int qemu_file_has_error(QEMUFile *f)
|
415 |
{ |
416 |
return f->has_error;
|
417 |
} |
418 |
|
419 |
void qemu_file_set_error(QEMUFile *f)
|
420 |
{ |
421 |
f->has_error = 1;
|
422 |
} |
423 |
|
424 |
void qemu_fflush(QEMUFile *f)
|
425 |
{ |
426 |
if (!f->put_buffer)
|
427 |
return;
|
428 |
|
429 |
if (f->is_write && f->buf_index > 0) { |
430 |
int len;
|
431 |
|
432 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
433 |
if (len > 0) |
434 |
f->buf_offset += f->buf_index; |
435 |
else
|
436 |
f->has_error = 1;
|
437 |
f->buf_index = 0;
|
438 |
} |
439 |
} |
440 |
|
441 |
static void qemu_fill_buffer(QEMUFile *f) |
442 |
{ |
443 |
int len;
|
444 |
|
445 |
if (!f->get_buffer)
|
446 |
return;
|
447 |
|
448 |
if (f->is_write)
|
449 |
abort(); |
450 |
|
451 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
452 |
if (len > 0) { |
453 |
f->buf_index = 0;
|
454 |
f->buf_size = len; |
455 |
f->buf_offset += len; |
456 |
} else if (len != -EAGAIN) |
457 |
f->has_error = 1;
|
458 |
} |
459 |
|
460 |
int qemu_fclose(QEMUFile *f)
|
461 |
{ |
462 |
int ret = 0; |
463 |
qemu_fflush(f); |
464 |
if (f->close)
|
465 |
ret = f->close(f->opaque); |
466 |
qemu_free(f); |
467 |
return ret;
|
468 |
} |
469 |
|
470 |
void qemu_file_put_notify(QEMUFile *f)
|
471 |
{ |
472 |
f->put_buffer(f->opaque, NULL, 0, 0); |
473 |
} |
474 |
|
475 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
476 |
{ |
477 |
int l;
|
478 |
|
479 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
480 |
fprintf(stderr, |
481 |
"Attempted to write to buffer while read buffer is not empty\n");
|
482 |
abort(); |
483 |
} |
484 |
|
485 |
while (!f->has_error && size > 0) { |
486 |
l = IO_BUF_SIZE - f->buf_index; |
487 |
if (l > size)
|
488 |
l = size; |
489 |
memcpy(f->buf + f->buf_index, buf, l); |
490 |
f->is_write = 1;
|
491 |
f->buf_index += l; |
492 |
buf += l; |
493 |
size -= l; |
494 |
if (f->buf_index >= IO_BUF_SIZE)
|
495 |
qemu_fflush(f); |
496 |
} |
497 |
} |
498 |
|
499 |
void qemu_put_byte(QEMUFile *f, int v) |
500 |
{ |
501 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
502 |
fprintf(stderr, |
503 |
"Attempted to write to buffer while read buffer is not empty\n");
|
504 |
abort(); |
505 |
} |
506 |
|
507 |
f->buf[f->buf_index++] = v; |
508 |
f->is_write = 1;
|
509 |
if (f->buf_index >= IO_BUF_SIZE)
|
510 |
qemu_fflush(f); |
511 |
} |
512 |
|
513 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
514 |
{ |
515 |
int size, l;
|
516 |
|
517 |
if (f->is_write)
|
518 |
abort(); |
519 |
|
520 |
size = size1; |
521 |
while (size > 0) { |
522 |
l = f->buf_size - f->buf_index; |
523 |
if (l == 0) { |
524 |
qemu_fill_buffer(f); |
525 |
l = f->buf_size - f->buf_index; |
526 |
if (l == 0) |
527 |
break;
|
528 |
} |
529 |
if (l > size)
|
530 |
l = size; |
531 |
memcpy(buf, f->buf + f->buf_index, l); |
532 |
f->buf_index += l; |
533 |
buf += l; |
534 |
size -= l; |
535 |
} |
536 |
return size1 - size;
|
537 |
} |
538 |
|
539 |
int qemu_get_byte(QEMUFile *f)
|
540 |
{ |
541 |
if (f->is_write)
|
542 |
abort(); |
543 |
|
544 |
if (f->buf_index >= f->buf_size) {
|
545 |
qemu_fill_buffer(f); |
546 |
if (f->buf_index >= f->buf_size)
|
547 |
return 0; |
548 |
} |
549 |
return f->buf[f->buf_index++];
|
550 |
} |
551 |
|
552 |
int64_t qemu_ftell(QEMUFile *f) |
553 |
{ |
554 |
return f->buf_offset - f->buf_size + f->buf_index;
|
555 |
} |
556 |
|
557 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
558 |
{ |
559 |
if (whence == SEEK_SET) {
|
560 |
/* nothing to do */
|
561 |
} else if (whence == SEEK_CUR) { |
562 |
pos += qemu_ftell(f); |
563 |
} else {
|
564 |
/* SEEK_END not supported */
|
565 |
return -1; |
566 |
} |
567 |
if (f->put_buffer) {
|
568 |
qemu_fflush(f); |
569 |
f->buf_offset = pos; |
570 |
} else {
|
571 |
f->buf_offset = pos; |
572 |
f->buf_index = 0;
|
573 |
f->buf_size = 0;
|
574 |
} |
575 |
return pos;
|
576 |
} |
577 |
|
578 |
int qemu_file_rate_limit(QEMUFile *f)
|
579 |
{ |
580 |
if (f->rate_limit)
|
581 |
return f->rate_limit(f->opaque);
|
582 |
|
583 |
return 0; |
584 |
} |
585 |
|
586 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
587 |
{ |
588 |
/* any failed or completed migration keeps its state to allow probing of
|
589 |
* migration data, but has no associated file anymore */
|
590 |
if (f && f->set_rate_limit)
|
591 |
return f->set_rate_limit(f->opaque, new_rate);
|
592 |
|
593 |
return 0; |
594 |
} |
595 |
|
596 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
597 |
{ |
598 |
qemu_put_byte(f, v >> 8);
|
599 |
qemu_put_byte(f, v); |
600 |
} |
601 |
|
602 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
603 |
{ |
604 |
qemu_put_byte(f, v >> 24);
|
605 |
qemu_put_byte(f, v >> 16);
|
606 |
qemu_put_byte(f, v >> 8);
|
607 |
qemu_put_byte(f, v); |
608 |
} |
609 |
|
610 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
611 |
{ |
612 |
qemu_put_be32(f, v >> 32);
|
613 |
qemu_put_be32(f, v); |
614 |
} |
615 |
|
616 |
unsigned int qemu_get_be16(QEMUFile *f) |
617 |
{ |
618 |
unsigned int v; |
619 |
v = qemu_get_byte(f) << 8;
|
620 |
v |= qemu_get_byte(f); |
621 |
return v;
|
622 |
} |
623 |
|
624 |
unsigned int qemu_get_be32(QEMUFile *f) |
625 |
{ |
626 |
unsigned int v; |
627 |
v = qemu_get_byte(f) << 24;
|
628 |
v |= qemu_get_byte(f) << 16;
|
629 |
v |= qemu_get_byte(f) << 8;
|
630 |
v |= qemu_get_byte(f); |
631 |
return v;
|
632 |
} |
633 |
|
634 |
uint64_t qemu_get_be64(QEMUFile *f) |
635 |
{ |
636 |
uint64_t v; |
637 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
638 |
v |= qemu_get_be32(f); |
639 |
return v;
|
640 |
} |
641 |
|
642 |
/* 8 bit int */
|
643 |
|
644 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
645 |
{ |
646 |
int8_t *v = pv; |
647 |
qemu_get_s8s(f, v); |
648 |
return 0; |
649 |
} |
650 |
|
651 |
static void put_int8(QEMUFile *f, const void *pv, size_t size) |
652 |
{ |
653 |
const int8_t *v = pv;
|
654 |
qemu_put_s8s(f, v); |
655 |
} |
656 |
|
657 |
const VMStateInfo vmstate_info_int8 = {
|
658 |
.name = "int8",
|
659 |
.get = get_int8, |
660 |
.put = put_int8, |
661 |
}; |
662 |
|
663 |
/* 16 bit int */
|
664 |
|
665 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
666 |
{ |
667 |
int16_t *v = pv; |
668 |
qemu_get_sbe16s(f, v); |
669 |
return 0; |
670 |
} |
671 |
|
672 |
static void put_int16(QEMUFile *f, const void *pv, size_t size) |
673 |
{ |
674 |
const int16_t *v = pv;
|
675 |
qemu_put_sbe16s(f, v); |
676 |
} |
677 |
|
678 |
const VMStateInfo vmstate_info_int16 = {
|
679 |
.name = "int16",
|
680 |
.get = get_int16, |
681 |
.put = put_int16, |
682 |
}; |
683 |
|
684 |
/* 32 bit int */
|
685 |
|
686 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
687 |
{ |
688 |
int32_t *v = pv; |
689 |
qemu_get_sbe32s(f, v); |
690 |
return 0; |
691 |
} |
692 |
|
693 |
static void put_int32(QEMUFile *f, const void *pv, size_t size) |
694 |
{ |
695 |
const int32_t *v = pv;
|
696 |
qemu_put_sbe32s(f, v); |
697 |
} |
698 |
|
699 |
const VMStateInfo vmstate_info_int32 = {
|
700 |
.name = "int32",
|
701 |
.get = get_int32, |
702 |
.put = put_int32, |
703 |
}; |
704 |
|
705 |
/* 64 bit int */
|
706 |
|
707 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
708 |
{ |
709 |
int64_t *v = pv; |
710 |
qemu_get_sbe64s(f, v); |
711 |
return 0; |
712 |
} |
713 |
|
714 |
static void put_int64(QEMUFile *f, const void *pv, size_t size) |
715 |
{ |
716 |
const int64_t *v = pv;
|
717 |
qemu_put_sbe64s(f, v); |
718 |
} |
719 |
|
720 |
const VMStateInfo vmstate_info_int64 = {
|
721 |
.name = "int64",
|
722 |
.get = get_int64, |
723 |
.put = put_int64, |
724 |
}; |
725 |
|
726 |
/* 8 bit unsigned int */
|
727 |
|
728 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
729 |
{ |
730 |
uint8_t *v = pv; |
731 |
qemu_get_8s(f, v); |
732 |
return 0; |
733 |
} |
734 |
|
735 |
static void put_uint8(QEMUFile *f, const void *pv, size_t size) |
736 |
{ |
737 |
const uint8_t *v = pv;
|
738 |
qemu_put_8s(f, v); |
739 |
} |
740 |
|
741 |
const VMStateInfo vmstate_info_uint8 = {
|
742 |
.name = "uint8",
|
743 |
.get = get_uint8, |
744 |
.put = put_uint8, |
745 |
}; |
746 |
|
747 |
/* 16 bit unsigned int */
|
748 |
|
749 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
750 |
{ |
751 |
uint16_t *v = pv; |
752 |
qemu_get_be16s(f, v); |
753 |
return 0; |
754 |
} |
755 |
|
756 |
static void put_uint16(QEMUFile *f, const void *pv, size_t size) |
757 |
{ |
758 |
const uint16_t *v = pv;
|
759 |
qemu_put_be16s(f, v); |
760 |
} |
761 |
|
762 |
const VMStateInfo vmstate_info_uint16 = {
|
763 |
.name = "uint16",
|
764 |
.get = get_uint16, |
765 |
.put = put_uint16, |
766 |
}; |
767 |
|
768 |
/* 32 bit unsigned int */
|
769 |
|
770 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
771 |
{ |
772 |
uint32_t *v = pv; |
773 |
qemu_get_be32s(f, v); |
774 |
return 0; |
775 |
} |
776 |
|
777 |
static void put_uint32(QEMUFile *f, const void *pv, size_t size) |
778 |
{ |
779 |
const uint32_t *v = pv;
|
780 |
qemu_put_be32s(f, v); |
781 |
} |
782 |
|
783 |
const VMStateInfo vmstate_info_uint32 = {
|
784 |
.name = "uint32",
|
785 |
.get = get_uint32, |
786 |
.put = put_uint32, |
787 |
}; |
788 |
|
789 |
/* 64 bit unsigned int */
|
790 |
|
791 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
792 |
{ |
793 |
uint64_t *v = pv; |
794 |
qemu_get_be64s(f, v); |
795 |
return 0; |
796 |
} |
797 |
|
798 |
static void put_uint64(QEMUFile *f, const void *pv, size_t size) |
799 |
{ |
800 |
const uint64_t *v = pv;
|
801 |
qemu_put_be64s(f, v); |
802 |
} |
803 |
|
804 |
const VMStateInfo vmstate_info_uint64 = {
|
805 |
.name = "uint64",
|
806 |
.get = get_uint64, |
807 |
.put = put_uint64, |
808 |
}; |
809 |
|
810 |
/* timers */
|
811 |
|
812 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
813 |
{ |
814 |
QEMUTimer *v = pv; |
815 |
qemu_get_timer(f, v); |
816 |
return 0; |
817 |
} |
818 |
|
819 |
static void put_timer(QEMUFile *f, const void *pv, size_t size) |
820 |
{ |
821 |
QEMUTimer *v = (void *)pv;
|
822 |
qemu_put_timer(f, v); |
823 |
} |
824 |
|
825 |
const VMStateInfo vmstate_info_timer = {
|
826 |
.name = "timer",
|
827 |
.get = get_timer, |
828 |
.put = put_timer, |
829 |
}; |
830 |
|
831 |
typedef struct SaveStateEntry { |
832 |
char idstr[256]; |
833 |
int instance_id;
|
834 |
int version_id;
|
835 |
int section_id;
|
836 |
SaveLiveStateHandler *save_live_state; |
837 |
SaveStateHandler *save_state; |
838 |
LoadStateHandler *load_state; |
839 |
const VMStateDescription *vmsd;
|
840 |
void *opaque;
|
841 |
struct SaveStateEntry *next;
|
842 |
} SaveStateEntry; |
843 |
|
844 |
static SaveStateEntry *first_se;
|
845 |
static int global_section_id; |
846 |
|
847 |
/* TODO: Individual devices generally have very little idea about the rest
|
848 |
of the system, so instance_id should be removed/replaced.
|
849 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
850 |
distinguishing id for all instances of your device class. */
|
851 |
int register_savevm_live(const char *idstr, |
852 |
int instance_id,
|
853 |
int version_id,
|
854 |
SaveLiveStateHandler *save_live_state, |
855 |
SaveStateHandler *save_state, |
856 |
LoadStateHandler *load_state, |
857 |
void *opaque)
|
858 |
{ |
859 |
SaveStateEntry *se, **pse; |
860 |
|
861 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
862 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
863 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
864 |
se->version_id = version_id; |
865 |
se->section_id = global_section_id++; |
866 |
se->save_live_state = save_live_state; |
867 |
se->save_state = save_state; |
868 |
se->load_state = load_state; |
869 |
se->opaque = opaque; |
870 |
se->vmsd = NULL;
|
871 |
se->next = NULL;
|
872 |
|
873 |
/* add at the end of list */
|
874 |
pse = &first_se; |
875 |
while (*pse != NULL) { |
876 |
if (instance_id == -1 |
877 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
878 |
&& se->instance_id <= (*pse)->instance_id) |
879 |
se->instance_id = (*pse)->instance_id + 1;
|
880 |
pse = &(*pse)->next; |
881 |
} |
882 |
*pse = se; |
883 |
return 0; |
884 |
} |
885 |
|
886 |
int register_savevm(const char *idstr, |
887 |
int instance_id,
|
888 |
int version_id,
|
889 |
SaveStateHandler *save_state, |
890 |
LoadStateHandler *load_state, |
891 |
void *opaque)
|
892 |
{ |
893 |
return register_savevm_live(idstr, instance_id, version_id,
|
894 |
NULL, save_state, load_state, opaque);
|
895 |
} |
896 |
|
897 |
void unregister_savevm(const char *idstr, void *opaque) |
898 |
{ |
899 |
SaveStateEntry **pse; |
900 |
|
901 |
pse = &first_se; |
902 |
while (*pse != NULL) { |
903 |
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
904 |
SaveStateEntry *next = (*pse)->next; |
905 |
qemu_free(*pse); |
906 |
*pse = next; |
907 |
continue;
|
908 |
} |
909 |
pse = &(*pse)->next; |
910 |
} |
911 |
} |
912 |
|
913 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
914 |
void *opaque)
|
915 |
{ |
916 |
SaveStateEntry *se, **pse; |
917 |
|
918 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
919 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
920 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
921 |
se->version_id = vmsd->version_id; |
922 |
se->section_id = global_section_id++; |
923 |
se->save_live_state = NULL;
|
924 |
se->save_state = NULL;
|
925 |
se->load_state = NULL;
|
926 |
se->opaque = opaque; |
927 |
se->vmsd = vmsd; |
928 |
se->next = NULL;
|
929 |
|
930 |
/* add at the end of list */
|
931 |
pse = &first_se; |
932 |
while (*pse != NULL) { |
933 |
if (instance_id == -1 |
934 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
935 |
&& se->instance_id <= (*pse)->instance_id) |
936 |
se->instance_id = (*pse)->instance_id + 1;
|
937 |
pse = &(*pse)->next; |
938 |
} |
939 |
*pse = se; |
940 |
return 0; |
941 |
} |
942 |
|
943 |
void vmstate_unregister(const char *idstr, void *opaque) |
944 |
{ |
945 |
SaveStateEntry **pse; |
946 |
|
947 |
pse = &first_se; |
948 |
while (*pse != NULL) { |
949 |
if (strcmp((*pse)->idstr, idstr) == 0 && (*pse)->opaque == opaque) { |
950 |
SaveStateEntry *next = (*pse)->next; |
951 |
qemu_free(*pse); |
952 |
*pse = next; |
953 |
continue;
|
954 |
} |
955 |
pse = &(*pse)->next; |
956 |
} |
957 |
} |
958 |
|
959 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
960 |
void *opaque, int version_id) |
961 |
{ |
962 |
VMStateField *field = vmsd->fields; |
963 |
|
964 |
if (version_id > vmsd->version_id) {
|
965 |
return -EINVAL;
|
966 |
} |
967 |
if (version_id < vmsd->minimum_version_id_old) {
|
968 |
return -EINVAL;
|
969 |
} |
970 |
if (version_id < vmsd->minimum_version_id) {
|
971 |
return vmsd->load_state_old(f, opaque, version_id);
|
972 |
} |
973 |
while(field->name) {
|
974 |
if (field->version_id <= version_id) {
|
975 |
void *addr = opaque + field->offset;
|
976 |
int ret;
|
977 |
|
978 |
if (field->flags & VMS_POINTER) {
|
979 |
addr = *(void **)addr;
|
980 |
} |
981 |
ret = field->info->get(f, addr, field->size); |
982 |
if (ret < 0) { |
983 |
return ret;
|
984 |
} |
985 |
} |
986 |
field++; |
987 |
} |
988 |
return 0; |
989 |
} |
990 |
|
991 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
992 |
const void *opaque) |
993 |
{ |
994 |
VMStateField *field = vmsd->fields; |
995 |
|
996 |
while(field->name) {
|
997 |
const void *addr = opaque + field->offset; |
998 |
|
999 |
if (field->flags & VMS_POINTER) {
|
1000 |
addr = *(void **)addr;
|
1001 |
} |
1002 |
field->info->put(f, addr, field->size); |
1003 |
field++; |
1004 |
} |
1005 |
} |
1006 |
|
1007 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1008 |
{ |
1009 |
if (!se->vmsd) { /* Old style */ |
1010 |
return se->load_state(f, se->opaque, version_id);
|
1011 |
} |
1012 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1013 |
} |
1014 |
|
1015 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1016 |
{ |
1017 |
if (!se->vmsd) { /* Old style */ |
1018 |
se->save_state(f, se->opaque); |
1019 |
return;
|
1020 |
} |
1021 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1022 |
} |
1023 |
|
1024 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1025 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1026 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1027 |
|
1028 |
#define QEMU_VM_EOF 0x00 |
1029 |
#define QEMU_VM_SECTION_START 0x01 |
1030 |
#define QEMU_VM_SECTION_PART 0x02 |
1031 |
#define QEMU_VM_SECTION_END 0x03 |
1032 |
#define QEMU_VM_SECTION_FULL 0x04 |
1033 |
|
1034 |
int qemu_savevm_state_begin(QEMUFile *f)
|
1035 |
{ |
1036 |
SaveStateEntry *se; |
1037 |
|
1038 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1039 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1040 |
|
1041 |
for (se = first_se; se != NULL; se = se->next) { |
1042 |
int len;
|
1043 |
|
1044 |
if (se->save_live_state == NULL) |
1045 |
continue;
|
1046 |
|
1047 |
/* Section type */
|
1048 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1049 |
qemu_put_be32(f, se->section_id); |
1050 |
|
1051 |
/* ID string */
|
1052 |
len = strlen(se->idstr); |
1053 |
qemu_put_byte(f, len); |
1054 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1055 |
|
1056 |
qemu_put_be32(f, se->instance_id); |
1057 |
qemu_put_be32(f, se->version_id); |
1058 |
|
1059 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
1060 |
} |
1061 |
|
1062 |
if (qemu_file_has_error(f))
|
1063 |
return -EIO;
|
1064 |
|
1065 |
return 0; |
1066 |
} |
1067 |
|
1068 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1069 |
{ |
1070 |
SaveStateEntry *se; |
1071 |
int ret = 1; |
1072 |
|
1073 |
for (se = first_se; se != NULL; se = se->next) { |
1074 |
if (se->save_live_state == NULL) |
1075 |
continue;
|
1076 |
|
1077 |
/* Section type */
|
1078 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1079 |
qemu_put_be32(f, se->section_id); |
1080 |
|
1081 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
1082 |
} |
1083 |
|
1084 |
if (ret)
|
1085 |
return 1; |
1086 |
|
1087 |
if (qemu_file_has_error(f))
|
1088 |
return -EIO;
|
1089 |
|
1090 |
return 0; |
1091 |
} |
1092 |
|
1093 |
int qemu_savevm_state_complete(QEMUFile *f)
|
1094 |
{ |
1095 |
SaveStateEntry *se; |
1096 |
|
1097 |
for (se = first_se; se != NULL; se = se->next) { |
1098 |
if (se->save_live_state == NULL) |
1099 |
continue;
|
1100 |
|
1101 |
/* Section type */
|
1102 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1103 |
qemu_put_be32(f, se->section_id); |
1104 |
|
1105 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
1106 |
} |
1107 |
|
1108 |
for(se = first_se; se != NULL; se = se->next) { |
1109 |
int len;
|
1110 |
|
1111 |
if (se->save_state == NULL && se->vmsd == NULL) |
1112 |
continue;
|
1113 |
|
1114 |
/* Section type */
|
1115 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1116 |
qemu_put_be32(f, se->section_id); |
1117 |
|
1118 |
/* ID string */
|
1119 |
len = strlen(se->idstr); |
1120 |
qemu_put_byte(f, len); |
1121 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1122 |
|
1123 |
qemu_put_be32(f, se->instance_id); |
1124 |
qemu_put_be32(f, se->version_id); |
1125 |
|
1126 |
vmstate_save(f, se); |
1127 |
} |
1128 |
|
1129 |
qemu_put_byte(f, QEMU_VM_EOF); |
1130 |
|
1131 |
if (qemu_file_has_error(f))
|
1132 |
return -EIO;
|
1133 |
|
1134 |
return 0; |
1135 |
} |
1136 |
|
1137 |
int qemu_savevm_state(QEMUFile *f)
|
1138 |
{ |
1139 |
int saved_vm_running;
|
1140 |
int ret;
|
1141 |
|
1142 |
saved_vm_running = vm_running; |
1143 |
vm_stop(0);
|
1144 |
|
1145 |
bdrv_flush_all(); |
1146 |
|
1147 |
ret = qemu_savevm_state_begin(f); |
1148 |
if (ret < 0) |
1149 |
goto out;
|
1150 |
|
1151 |
do {
|
1152 |
ret = qemu_savevm_state_iterate(f); |
1153 |
if (ret < 0) |
1154 |
goto out;
|
1155 |
} while (ret == 0); |
1156 |
|
1157 |
ret = qemu_savevm_state_complete(f); |
1158 |
|
1159 |
out:
|
1160 |
if (qemu_file_has_error(f))
|
1161 |
ret = -EIO; |
1162 |
|
1163 |
if (!ret && saved_vm_running)
|
1164 |
vm_start(); |
1165 |
|
1166 |
return ret;
|
1167 |
} |
1168 |
|
1169 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1170 |
{ |
1171 |
SaveStateEntry *se; |
1172 |
|
1173 |
for(se = first_se; se != NULL; se = se->next) { |
1174 |
if (!strcmp(se->idstr, idstr) &&
|
1175 |
instance_id == se->instance_id) |
1176 |
return se;
|
1177 |
} |
1178 |
return NULL; |
1179 |
} |
1180 |
|
1181 |
typedef struct LoadStateEntry { |
1182 |
SaveStateEntry *se; |
1183 |
int section_id;
|
1184 |
int version_id;
|
1185 |
struct LoadStateEntry *next;
|
1186 |
} LoadStateEntry; |
1187 |
|
1188 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
1189 |
{ |
1190 |
SaveStateEntry *se; |
1191 |
int len, ret, instance_id, record_len, version_id;
|
1192 |
int64_t total_len, end_pos, cur_pos; |
1193 |
char idstr[256]; |
1194 |
|
1195 |
total_len = qemu_get_be64(f); |
1196 |
end_pos = total_len + qemu_ftell(f); |
1197 |
for(;;) {
|
1198 |
if (qemu_ftell(f) >= end_pos)
|
1199 |
break;
|
1200 |
len = qemu_get_byte(f); |
1201 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1202 |
idstr[len] = '\0';
|
1203 |
instance_id = qemu_get_be32(f); |
1204 |
version_id = qemu_get_be32(f); |
1205 |
record_len = qemu_get_be32(f); |
1206 |
cur_pos = qemu_ftell(f); |
1207 |
se = find_se(idstr, instance_id); |
1208 |
if (!se) {
|
1209 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
1210 |
instance_id, idstr); |
1211 |
} else {
|
1212 |
ret = vmstate_load(f, se, version_id); |
1213 |
if (ret < 0) { |
1214 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1215 |
instance_id, idstr); |
1216 |
return ret;
|
1217 |
} |
1218 |
} |
1219 |
/* always seek to exact end of record */
|
1220 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
1221 |
} |
1222 |
|
1223 |
if (qemu_file_has_error(f))
|
1224 |
return -EIO;
|
1225 |
|
1226 |
return 0; |
1227 |
} |
1228 |
|
1229 |
int qemu_loadvm_state(QEMUFile *f)
|
1230 |
{ |
1231 |
LoadStateEntry *first_le = NULL;
|
1232 |
uint8_t section_type; |
1233 |
unsigned int v; |
1234 |
int ret;
|
1235 |
|
1236 |
v = qemu_get_be32(f); |
1237 |
if (v != QEMU_VM_FILE_MAGIC)
|
1238 |
return -EINVAL;
|
1239 |
|
1240 |
v = qemu_get_be32(f); |
1241 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
1242 |
return qemu_loadvm_state_v2(f);
|
1243 |
if (v != QEMU_VM_FILE_VERSION)
|
1244 |
return -ENOTSUP;
|
1245 |
|
1246 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1247 |
uint32_t instance_id, version_id, section_id; |
1248 |
LoadStateEntry *le; |
1249 |
SaveStateEntry *se; |
1250 |
char idstr[257]; |
1251 |
int len;
|
1252 |
|
1253 |
switch (section_type) {
|
1254 |
case QEMU_VM_SECTION_START:
|
1255 |
case QEMU_VM_SECTION_FULL:
|
1256 |
/* Read section start */
|
1257 |
section_id = qemu_get_be32(f); |
1258 |
len = qemu_get_byte(f); |
1259 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1260 |
idstr[len] = 0;
|
1261 |
instance_id = qemu_get_be32(f); |
1262 |
version_id = qemu_get_be32(f); |
1263 |
|
1264 |
/* Find savevm section */
|
1265 |
se = find_se(idstr, instance_id); |
1266 |
if (se == NULL) { |
1267 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1268 |
ret = -EINVAL; |
1269 |
goto out;
|
1270 |
} |
1271 |
|
1272 |
/* Validate version */
|
1273 |
if (version_id > se->version_id) {
|
1274 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1275 |
version_id, idstr, se->version_id); |
1276 |
ret = -EINVAL; |
1277 |
goto out;
|
1278 |
} |
1279 |
|
1280 |
/* Add entry */
|
1281 |
le = qemu_mallocz(sizeof(*le));
|
1282 |
|
1283 |
le->se = se; |
1284 |
le->section_id = section_id; |
1285 |
le->version_id = version_id; |
1286 |
le->next = first_le; |
1287 |
first_le = le; |
1288 |
|
1289 |
ret = vmstate_load(f, le->se, le->version_id); |
1290 |
if (ret < 0) { |
1291 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1292 |
instance_id, idstr); |
1293 |
goto out;
|
1294 |
} |
1295 |
break;
|
1296 |
case QEMU_VM_SECTION_PART:
|
1297 |
case QEMU_VM_SECTION_END:
|
1298 |
section_id = qemu_get_be32(f); |
1299 |
|
1300 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
1301 |
if (le == NULL) { |
1302 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1303 |
ret = -EINVAL; |
1304 |
goto out;
|
1305 |
} |
1306 |
|
1307 |
ret = vmstate_load(f, le->se, le->version_id); |
1308 |
if (ret < 0) { |
1309 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1310 |
section_id); |
1311 |
goto out;
|
1312 |
} |
1313 |
break;
|
1314 |
default:
|
1315 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1316 |
ret = -EINVAL; |
1317 |
goto out;
|
1318 |
} |
1319 |
} |
1320 |
|
1321 |
ret = 0;
|
1322 |
|
1323 |
out:
|
1324 |
while (first_le) {
|
1325 |
LoadStateEntry *le = first_le; |
1326 |
first_le = first_le->next; |
1327 |
qemu_free(le); |
1328 |
} |
1329 |
|
1330 |
if (qemu_file_has_error(f))
|
1331 |
ret = -EIO; |
1332 |
|
1333 |
return ret;
|
1334 |
} |
1335 |
|
1336 |
/* device can contain snapshots */
|
1337 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1338 |
{ |
1339 |
return (bs &&
|
1340 |
!bdrv_is_removable(bs) && |
1341 |
!bdrv_is_read_only(bs)); |
1342 |
} |
1343 |
|
1344 |
/* device must be snapshots in order to have a reliable snapshot */
|
1345 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1346 |
{ |
1347 |
return (bs &&
|
1348 |
!bdrv_is_removable(bs) && |
1349 |
!bdrv_is_read_only(bs)); |
1350 |
} |
1351 |
|
1352 |
static BlockDriverState *get_bs_snapshots(void) |
1353 |
{ |
1354 |
BlockDriverState *bs; |
1355 |
DriveInfo *dinfo; |
1356 |
|
1357 |
if (bs_snapshots)
|
1358 |
return bs_snapshots;
|
1359 |
TAILQ_FOREACH(dinfo, &drives, next) { |
1360 |
bs = dinfo->bdrv; |
1361 |
if (bdrv_can_snapshot(bs))
|
1362 |
goto ok;
|
1363 |
} |
1364 |
return NULL; |
1365 |
ok:
|
1366 |
bs_snapshots = bs; |
1367 |
return bs;
|
1368 |
} |
1369 |
|
1370 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1371 |
const char *name) |
1372 |
{ |
1373 |
QEMUSnapshotInfo *sn_tab, *sn; |
1374 |
int nb_sns, i, ret;
|
1375 |
|
1376 |
ret = -ENOENT; |
1377 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1378 |
if (nb_sns < 0) |
1379 |
return ret;
|
1380 |
for(i = 0; i < nb_sns; i++) { |
1381 |
sn = &sn_tab[i]; |
1382 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1383 |
*sn_info = *sn; |
1384 |
ret = 0;
|
1385 |
break;
|
1386 |
} |
1387 |
} |
1388 |
qemu_free(sn_tab); |
1389 |
return ret;
|
1390 |
} |
1391 |
|
1392 |
void do_savevm(Monitor *mon, const char *name) |
1393 |
{ |
1394 |
DriveInfo *dinfo; |
1395 |
BlockDriverState *bs, *bs1; |
1396 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1397 |
int must_delete, ret;
|
1398 |
QEMUFile *f; |
1399 |
int saved_vm_running;
|
1400 |
uint32_t vm_state_size; |
1401 |
#ifdef _WIN32
|
1402 |
struct _timeb tb;
|
1403 |
#else
|
1404 |
struct timeval tv;
|
1405 |
#endif
|
1406 |
|
1407 |
bs = get_bs_snapshots(); |
1408 |
if (!bs) {
|
1409 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1410 |
return;
|
1411 |
} |
1412 |
|
1413 |
/* ??? Should this occur after vm_stop? */
|
1414 |
qemu_aio_flush(); |
1415 |
|
1416 |
saved_vm_running = vm_running; |
1417 |
vm_stop(0);
|
1418 |
|
1419 |
must_delete = 0;
|
1420 |
if (name) {
|
1421 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1422 |
if (ret >= 0) { |
1423 |
must_delete = 1;
|
1424 |
} |
1425 |
} |
1426 |
memset(sn, 0, sizeof(*sn)); |
1427 |
if (must_delete) {
|
1428 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1429 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1430 |
} else {
|
1431 |
if (name)
|
1432 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1433 |
} |
1434 |
|
1435 |
/* fill auxiliary fields */
|
1436 |
#ifdef _WIN32
|
1437 |
_ftime(&tb); |
1438 |
sn->date_sec = tb.time; |
1439 |
sn->date_nsec = tb.millitm * 1000000;
|
1440 |
#else
|
1441 |
gettimeofday(&tv, NULL);
|
1442 |
sn->date_sec = tv.tv_sec; |
1443 |
sn->date_nsec = tv.tv_usec * 1000;
|
1444 |
#endif
|
1445 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1446 |
|
1447 |
/* save the VM state */
|
1448 |
f = qemu_fopen_bdrv(bs, 1);
|
1449 |
if (!f) {
|
1450 |
monitor_printf(mon, "Could not open VM state file\n");
|
1451 |
goto the_end;
|
1452 |
} |
1453 |
ret = qemu_savevm_state(f); |
1454 |
vm_state_size = qemu_ftell(f); |
1455 |
qemu_fclose(f); |
1456 |
if (ret < 0) { |
1457 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1458 |
goto the_end;
|
1459 |
} |
1460 |
|
1461 |
/* create the snapshots */
|
1462 |
|
1463 |
TAILQ_FOREACH(dinfo, &drives, next) { |
1464 |
bs1 = dinfo->bdrv; |
1465 |
if (bdrv_has_snapshot(bs1)) {
|
1466 |
if (must_delete) {
|
1467 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1468 |
if (ret < 0) { |
1469 |
monitor_printf(mon, |
1470 |
"Error while deleting snapshot on '%s'\n",
|
1471 |
bdrv_get_device_name(bs1)); |
1472 |
} |
1473 |
} |
1474 |
/* Write VM state size only to the image that contains the state */
|
1475 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1476 |
ret = bdrv_snapshot_create(bs1, sn); |
1477 |
if (ret < 0) { |
1478 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1479 |
bdrv_get_device_name(bs1)); |
1480 |
} |
1481 |
} |
1482 |
} |
1483 |
|
1484 |
the_end:
|
1485 |
if (saved_vm_running)
|
1486 |
vm_start(); |
1487 |
} |
1488 |
|
1489 |
int load_vmstate(Monitor *mon, const char *name) |
1490 |
{ |
1491 |
DriveInfo *dinfo; |
1492 |
BlockDriverState *bs, *bs1; |
1493 |
QEMUSnapshotInfo sn; |
1494 |
QEMUFile *f; |
1495 |
int ret;
|
1496 |
|
1497 |
bs = get_bs_snapshots(); |
1498 |
if (!bs) {
|
1499 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1500 |
return -EINVAL;
|
1501 |
} |
1502 |
|
1503 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1504 |
qemu_aio_flush(); |
1505 |
|
1506 |
TAILQ_FOREACH(dinfo, &drives, next) { |
1507 |
bs1 = dinfo->bdrv; |
1508 |
if (bdrv_has_snapshot(bs1)) {
|
1509 |
ret = bdrv_snapshot_goto(bs1, name); |
1510 |
if (ret < 0) { |
1511 |
if (bs != bs1)
|
1512 |
monitor_printf(mon, "Warning: ");
|
1513 |
switch(ret) {
|
1514 |
case -ENOTSUP:
|
1515 |
monitor_printf(mon, |
1516 |
"Snapshots not supported on device '%s'\n",
|
1517 |
bdrv_get_device_name(bs1)); |
1518 |
break;
|
1519 |
case -ENOENT:
|
1520 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1521 |
"device '%s'\n",
|
1522 |
name, bdrv_get_device_name(bs1)); |
1523 |
break;
|
1524 |
default:
|
1525 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1526 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1527 |
break;
|
1528 |
} |
1529 |
/* fatal on snapshot block device */
|
1530 |
if (bs == bs1)
|
1531 |
return 0; |
1532 |
} |
1533 |
} |
1534 |
} |
1535 |
|
1536 |
/* Don't even try to load empty VM states */
|
1537 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1538 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1539 |
return -EINVAL;
|
1540 |
|
1541 |
/* restore the VM state */
|
1542 |
f = qemu_fopen_bdrv(bs, 0);
|
1543 |
if (!f) {
|
1544 |
monitor_printf(mon, "Could not open VM state file\n");
|
1545 |
return -EINVAL;
|
1546 |
} |
1547 |
ret = qemu_loadvm_state(f); |
1548 |
qemu_fclose(f); |
1549 |
if (ret < 0) { |
1550 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1551 |
return ret;
|
1552 |
} |
1553 |
return 0; |
1554 |
} |
1555 |
|
1556 |
void do_delvm(Monitor *mon, const char *name) |
1557 |
{ |
1558 |
DriveInfo *dinfo; |
1559 |
BlockDriverState *bs, *bs1; |
1560 |
int ret;
|
1561 |
|
1562 |
bs = get_bs_snapshots(); |
1563 |
if (!bs) {
|
1564 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1565 |
return;
|
1566 |
} |
1567 |
|
1568 |
TAILQ_FOREACH(dinfo, &drives, next) { |
1569 |
bs1 = dinfo->bdrv; |
1570 |
if (bdrv_has_snapshot(bs1)) {
|
1571 |
ret = bdrv_snapshot_delete(bs1, name); |
1572 |
if (ret < 0) { |
1573 |
if (ret == -ENOTSUP)
|
1574 |
monitor_printf(mon, |
1575 |
"Snapshots not supported on device '%s'\n",
|
1576 |
bdrv_get_device_name(bs1)); |
1577 |
else
|
1578 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1579 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1580 |
} |
1581 |
} |
1582 |
} |
1583 |
} |
1584 |
|
1585 |
void do_info_snapshots(Monitor *mon)
|
1586 |
{ |
1587 |
DriveInfo *dinfo; |
1588 |
BlockDriverState *bs, *bs1; |
1589 |
QEMUSnapshotInfo *sn_tab, *sn; |
1590 |
int nb_sns, i;
|
1591 |
char buf[256]; |
1592 |
|
1593 |
bs = get_bs_snapshots(); |
1594 |
if (!bs) {
|
1595 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1596 |
return;
|
1597 |
} |
1598 |
monitor_printf(mon, "Snapshot devices:");
|
1599 |
TAILQ_FOREACH(dinfo, &drives, next) { |
1600 |
bs1 = dinfo->bdrv; |
1601 |
if (bdrv_has_snapshot(bs1)) {
|
1602 |
if (bs == bs1)
|
1603 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1604 |
} |
1605 |
} |
1606 |
monitor_printf(mon, "\n");
|
1607 |
|
1608 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1609 |
if (nb_sns < 0) { |
1610 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1611 |
return;
|
1612 |
} |
1613 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1614 |
bdrv_get_device_name(bs)); |
1615 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1616 |
for(i = 0; i < nb_sns; i++) { |
1617 |
sn = &sn_tab[i]; |
1618 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1619 |
} |
1620 |
qemu_free(sn_tab); |
1621 |
} |