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| 1 |
/*
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|---|---|
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
| 25 |
#include <fcntl.h> |
| 26 |
#include <signal.h> |
| 27 |
#include <time.h> |
| 28 |
#include <errno.h> |
| 29 |
#include <sys/time.h> |
| 30 |
#include <zlib.h> |
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|
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/* Needed early for HOST_BSD etc. */
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#include "config-host.h" |
| 34 |
|
| 35 |
#ifndef _WIN32
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#include <sys/times.h> |
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#include <sys/wait.h> |
| 38 |
#include <termios.h> |
| 39 |
#include <sys/mman.h> |
| 40 |
#include <sys/ioctl.h> |
| 41 |
#include <sys/resource.h> |
| 42 |
#include <sys/socket.h> |
| 43 |
#include <netinet/in.h> |
| 44 |
#include <net/if.h> |
| 45 |
#if defined(__NetBSD__)
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#include <net/if_tap.h> |
| 47 |
#endif
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| 48 |
#ifdef __linux__
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#include <linux/if_tun.h> |
| 50 |
#endif
|
| 51 |
#include <arpa/inet.h> |
| 52 |
#include <dirent.h> |
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#include <netdb.h> |
| 54 |
#include <sys/select.h> |
| 55 |
#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> |
| 61 |
#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> |
| 69 |
#endif
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#endif
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#endif
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|
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#ifdef _WIN32
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#include <windows.h> |
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#include <malloc.h> |
| 76 |
#include <sys/timeb.h> |
| 77 |
#include <mmsystem.h> |
| 78 |
#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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| 81 |
|
| 82 |
#include "qemu-common.h" |
| 83 |
#include "hw/hw.h" |
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#include "net.h" |
| 85 |
#include "monitor.h" |
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#include "sysemu.h" |
| 87 |
#include "qemu-timer.h" |
| 88 |
#include "qemu-char.h" |
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#include "block.h" |
| 90 |
#include "audio/audio.h" |
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#include "migration.h" |
| 92 |
#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 |
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|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{
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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, 0xff, 6); /* h_dst */ |
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memcpy(buf + 6, mac_addr, 6); /* h_src */ |
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memcpy(buf + 12, &proto, 2); /* h_proto */ |
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memcpy(buf + 14, &magic, 4); /* magic */ |
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|
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return 18; /* len */ |
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} |
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|
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void qemu_announce_self(void) |
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{
|
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int i, j, len;
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VLANState *vlan; |
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VLANClientState *vc; |
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uint8_t buf[256];
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|
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for (i = 0; i < MAX_NICS; i++) { |
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if (!nd_table[i].used)
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continue;
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len = announce_self_create(buf, nd_table[i].macaddr); |
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vlan = nd_table[i].vlan; |
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for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
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for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++) |
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vc->fd_read(vc->opaque, buf, len); |
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} |
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} |
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} |
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/***********************************************************/
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/* savevm/loadvm support */
|
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|
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#define IO_BUF_SIZE 32768 |
| 141 |
|
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struct QEMUFile {
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QEMUFilePutBufferFunc *put_buffer; |
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QEMUFileGetBufferFunc *get_buffer; |
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QEMUFileCloseFunc *close; |
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QEMUFileRateLimit *rate_limit; |
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void *opaque;
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int is_write;
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|
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int64_t buf_offset; /* start of buffer when writing, end of buffer
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when reading */
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int buf_index;
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int buf_size; /* 0 when writing */ |
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uint8_t buf[IO_BUF_SIZE]; |
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|
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int has_error;
|
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}; |
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|
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typedef struct QEMUFilePopen |
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{
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FILE *popen_file; |
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QEMUFile *file; |
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} QEMUFilePopen; |
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|
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typedef struct QEMUFileSocket |
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{
|
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int fd;
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QEMUFile *file; |
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} QEMUFileSocket; |
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|
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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, buf, size, 0);
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} while (len == -1 && socket_error() == EINTR); |
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|
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if (len == -1) |
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len = -socket_error(); |
| 182 |
|
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return len;
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} |
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|
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static int socket_close(void *opaque) |
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{
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QEMUFileSocket *s = opaque; |
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qemu_free(s); |
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return 0; |
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} |
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|
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static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{
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QEMUFilePopen *s = opaque; |
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return fwrite(buf, 1, size, s->popen_file); |
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} |
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|
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static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{
|
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QEMUFilePopen *s = opaque; |
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return fread(buf, 1, size, s->popen_file); |
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} |
| 204 |
|
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static int popen_close(void *opaque) |
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{
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QEMUFilePopen *s = opaque; |
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pclose(s->popen_file); |
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qemu_free(s); |
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return 0; |
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} |
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|
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QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
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{
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QEMUFilePopen *s; |
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|
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if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
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fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL; |
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} |
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|
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s = qemu_mallocz(sizeof(QEMUFilePopen));
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|
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s->popen_file = popen_file; |
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|
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if(mode[0] == 'r') { |
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s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL); |
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} else {
|
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s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL); |
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} |
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fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
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return s->file;
|
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} |
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|
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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; |
| 238 |
|
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popen_file = popen(command, mode); |
| 240 |
if(popen_file == NULL) { |
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return NULL; |
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} |
| 243 |
|
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return qemu_popen(popen_file, mode);
|
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} |
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|
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QEMUFile *qemu_fopen_socket(int fd)
|
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{
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QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
|
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|
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s->fd = fd; |
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s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL); |
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return s->file;
|
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} |
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|
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typedef struct QEMUFileStdio |
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{
|
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FILE *outfile; |
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} QEMUFileStdio; |
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|
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static int file_put_buffer(void *opaque, const uint8_t *buf, |
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int64_t pos, int size)
|
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{
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QEMUFileStdio *s = opaque; |
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fseek(s->outfile, pos, SEEK_SET); |
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fwrite(buf, 1, size, s->outfile);
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return size;
|
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} |
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|
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static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{
|
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QEMUFileStdio *s = opaque; |
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fseek(s->outfile, pos, SEEK_SET); |
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return fread(buf, 1, size, s->outfile); |
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} |
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|
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static int file_close(void *opaque) |
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{
|
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QEMUFileStdio *s = opaque; |
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fclose(s->outfile); |
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qemu_free(s); |
| 282 |
return 0; |
| 283 |
} |
| 284 |
|
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QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| 286 |
{
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QEMUFileStdio *s; |
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|
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s = qemu_mallocz(sizeof(QEMUFileStdio));
|
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|
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s->outfile = fopen(filename, mode); |
| 292 |
if (!s->outfile)
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goto fail;
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|
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if (!strcmp(mode, "wb")) |
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return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL); |
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else if (!strcmp(mode, "rb")) |
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return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL); |
| 299 |
|
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fail:
|
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if (s->outfile)
|
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fclose(s->outfile); |
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qemu_free(s); |
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return NULL; |
| 305 |
} |
| 306 |
|
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typedef struct QEMUFileBdrv |
| 308 |
{
|
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BlockDriverState *bs; |
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int64_t base_offset; |
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} QEMUFileBdrv; |
| 312 |
|
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static int block_put_buffer(void *opaque, const uint8_t *buf, |
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int64_t pos, int size)
|
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{
|
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QEMUFileBdrv *s = opaque; |
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bdrv_put_buffer(s->bs, buf, s->base_offset + pos, size); |
| 318 |
return size;
|
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} |
| 320 |
|
| 321 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| 322 |
{
|
| 323 |
QEMUFileBdrv *s = opaque; |
| 324 |
return bdrv_get_buffer(s->bs, buf, s->base_offset + pos, size);
|
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} |
| 326 |
|
| 327 |
static int bdrv_fclose(void *opaque) |
| 328 |
{
|
| 329 |
QEMUFileBdrv *s = opaque; |
| 330 |
qemu_free(s); |
| 331 |
return 0; |
| 332 |
} |
| 333 |
|
| 334 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
| 335 |
{
|
| 336 |
QEMUFileBdrv *s; |
| 337 |
|
| 338 |
s = qemu_mallocz(sizeof(QEMUFileBdrv));
|
| 339 |
|
| 340 |
s->bs = bs; |
| 341 |
s->base_offset = offset; |
| 342 |
|
| 343 |
if (is_writable)
|
| 344 |
return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL); |
| 345 |
|
| 346 |
return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL); |
| 347 |
} |
| 348 |
|
| 349 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
| 350 |
QEMUFileGetBufferFunc *get_buffer, |
| 351 |
QEMUFileCloseFunc *close, |
| 352 |
QEMUFileRateLimit *rate_limit) |
| 353 |
{
|
| 354 |
QEMUFile *f; |
| 355 |
|
| 356 |
f = qemu_mallocz(sizeof(QEMUFile));
|
| 357 |
|
| 358 |
f->opaque = opaque; |
| 359 |
f->put_buffer = put_buffer; |
| 360 |
f->get_buffer = get_buffer; |
| 361 |
f->close = close; |
| 362 |
f->rate_limit = rate_limit; |
| 363 |
f->is_write = 0;
|
| 364 |
|
| 365 |
return f;
|
| 366 |
} |
| 367 |
|
| 368 |
int qemu_file_has_error(QEMUFile *f)
|
| 369 |
{
|
| 370 |
return f->has_error;
|
| 371 |
} |
| 372 |
|
| 373 |
void qemu_fflush(QEMUFile *f)
|
| 374 |
{
|
| 375 |
if (!f->put_buffer)
|
| 376 |
return;
|
| 377 |
|
| 378 |
if (f->is_write && f->buf_index > 0) { |
| 379 |
int len;
|
| 380 |
|
| 381 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| 382 |
if (len > 0) |
| 383 |
f->buf_offset += f->buf_index; |
| 384 |
else
|
| 385 |
f->has_error = 1;
|
| 386 |
f->buf_index = 0;
|
| 387 |
} |
| 388 |
} |
| 389 |
|
| 390 |
static void qemu_fill_buffer(QEMUFile *f) |
| 391 |
{
|
| 392 |
int len;
|
| 393 |
|
| 394 |
if (!f->get_buffer)
|
| 395 |
return;
|
| 396 |
|
| 397 |
if (f->is_write)
|
| 398 |
abort(); |
| 399 |
|
| 400 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
| 401 |
if (len > 0) { |
| 402 |
f->buf_index = 0;
|
| 403 |
f->buf_size = len; |
| 404 |
f->buf_offset += len; |
| 405 |
} else if (len != -EAGAIN) |
| 406 |
f->has_error = 1;
|
| 407 |
} |
| 408 |
|
| 409 |
int qemu_fclose(QEMUFile *f)
|
| 410 |
{
|
| 411 |
int ret = 0; |
| 412 |
qemu_fflush(f); |
| 413 |
if (f->close)
|
| 414 |
ret = f->close(f->opaque); |
| 415 |
qemu_free(f); |
| 416 |
return ret;
|
| 417 |
} |
| 418 |
|
| 419 |
void qemu_file_put_notify(QEMUFile *f)
|
| 420 |
{
|
| 421 |
f->put_buffer(f->opaque, NULL, 0, 0); |
| 422 |
} |
| 423 |
|
| 424 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| 425 |
{
|
| 426 |
int l;
|
| 427 |
|
| 428 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
| 429 |
fprintf(stderr, |
| 430 |
"Attempted to write to buffer while read buffer is not empty\n");
|
| 431 |
abort(); |
| 432 |
} |
| 433 |
|
| 434 |
while (!f->has_error && size > 0) { |
| 435 |
l = IO_BUF_SIZE - f->buf_index; |
| 436 |
if (l > size)
|
| 437 |
l = size; |
| 438 |
memcpy(f->buf + f->buf_index, buf, l); |
| 439 |
f->is_write = 1;
|
| 440 |
f->buf_index += l; |
| 441 |
buf += l; |
| 442 |
size -= l; |
| 443 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 444 |
qemu_fflush(f); |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
void qemu_put_byte(QEMUFile *f, int v) |
| 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 |
f->buf[f->buf_index++] = v; |
| 457 |
f->is_write = 1;
|
| 458 |
if (f->buf_index >= IO_BUF_SIZE)
|
| 459 |
qemu_fflush(f); |
| 460 |
} |
| 461 |
|
| 462 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
| 463 |
{
|
| 464 |
int size, l;
|
| 465 |
|
| 466 |
if (f->is_write)
|
| 467 |
abort(); |
| 468 |
|
| 469 |
size = size1; |
| 470 |
while (size > 0) { |
| 471 |
l = f->buf_size - f->buf_index; |
| 472 |
if (l == 0) { |
| 473 |
qemu_fill_buffer(f); |
| 474 |
l = f->buf_size - f->buf_index; |
| 475 |
if (l == 0) |
| 476 |
break;
|
| 477 |
} |
| 478 |
if (l > size)
|
| 479 |
l = size; |
| 480 |
memcpy(buf, f->buf + f->buf_index, l); |
| 481 |
f->buf_index += l; |
| 482 |
buf += l; |
| 483 |
size -= l; |
| 484 |
} |
| 485 |
return size1 - size;
|
| 486 |
} |
| 487 |
|
| 488 |
int qemu_get_byte(QEMUFile *f)
|
| 489 |
{
|
| 490 |
if (f->is_write)
|
| 491 |
abort(); |
| 492 |
|
| 493 |
if (f->buf_index >= f->buf_size) {
|
| 494 |
qemu_fill_buffer(f); |
| 495 |
if (f->buf_index >= f->buf_size)
|
| 496 |
return 0; |
| 497 |
} |
| 498 |
return f->buf[f->buf_index++];
|
| 499 |
} |
| 500 |
|
| 501 |
int64_t qemu_ftell(QEMUFile *f) |
| 502 |
{
|
| 503 |
return f->buf_offset - f->buf_size + f->buf_index;
|
| 504 |
} |
| 505 |
|
| 506 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
| 507 |
{
|
| 508 |
if (whence == SEEK_SET) {
|
| 509 |
/* nothing to do */
|
| 510 |
} else if (whence == SEEK_CUR) { |
| 511 |
pos += qemu_ftell(f); |
| 512 |
} else {
|
| 513 |
/* SEEK_END not supported */
|
| 514 |
return -1; |
| 515 |
} |
| 516 |
if (f->put_buffer) {
|
| 517 |
qemu_fflush(f); |
| 518 |
f->buf_offset = pos; |
| 519 |
} else {
|
| 520 |
f->buf_offset = pos; |
| 521 |
f->buf_index = 0;
|
| 522 |
f->buf_size = 0;
|
| 523 |
} |
| 524 |
return pos;
|
| 525 |
} |
| 526 |
|
| 527 |
int qemu_file_rate_limit(QEMUFile *f)
|
| 528 |
{
|
| 529 |
if (f->rate_limit)
|
| 530 |
return f->rate_limit(f->opaque);
|
| 531 |
|
| 532 |
return 0; |
| 533 |
} |
| 534 |
|
| 535 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
| 536 |
{
|
| 537 |
qemu_put_byte(f, v >> 8);
|
| 538 |
qemu_put_byte(f, v); |
| 539 |
} |
| 540 |
|
| 541 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
| 542 |
{
|
| 543 |
qemu_put_byte(f, v >> 24);
|
| 544 |
qemu_put_byte(f, v >> 16);
|
| 545 |
qemu_put_byte(f, v >> 8);
|
| 546 |
qemu_put_byte(f, v); |
| 547 |
} |
| 548 |
|
| 549 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
| 550 |
{
|
| 551 |
qemu_put_be32(f, v >> 32);
|
| 552 |
qemu_put_be32(f, v); |
| 553 |
} |
| 554 |
|
| 555 |
unsigned int qemu_get_be16(QEMUFile *f) |
| 556 |
{
|
| 557 |
unsigned int v; |
| 558 |
v = qemu_get_byte(f) << 8;
|
| 559 |
v |= qemu_get_byte(f); |
| 560 |
return v;
|
| 561 |
} |
| 562 |
|
| 563 |
unsigned int qemu_get_be32(QEMUFile *f) |
| 564 |
{
|
| 565 |
unsigned int v; |
| 566 |
v = qemu_get_byte(f) << 24;
|
| 567 |
v |= qemu_get_byte(f) << 16;
|
| 568 |
v |= qemu_get_byte(f) << 8;
|
| 569 |
v |= qemu_get_byte(f); |
| 570 |
return v;
|
| 571 |
} |
| 572 |
|
| 573 |
uint64_t qemu_get_be64(QEMUFile *f) |
| 574 |
{
|
| 575 |
uint64_t v; |
| 576 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
| 577 |
v |= qemu_get_be32(f); |
| 578 |
return v;
|
| 579 |
} |
| 580 |
|
| 581 |
typedef struct SaveStateEntry { |
| 582 |
char idstr[256]; |
| 583 |
int instance_id;
|
| 584 |
int version_id;
|
| 585 |
int section_id;
|
| 586 |
SaveLiveStateHandler *save_live_state; |
| 587 |
SaveStateHandler *save_state; |
| 588 |
LoadStateHandler *load_state; |
| 589 |
void *opaque;
|
| 590 |
struct SaveStateEntry *next;
|
| 591 |
} SaveStateEntry; |
| 592 |
|
| 593 |
static SaveStateEntry *first_se;
|
| 594 |
|
| 595 |
/* TODO: Individual devices generally have very little idea about the rest
|
| 596 |
of the system, so instance_id should be removed/replaced.
|
| 597 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
| 598 |
distinguishing id for all instances of your device class. */
|
| 599 |
int register_savevm_live(const char *idstr, |
| 600 |
int instance_id,
|
| 601 |
int version_id,
|
| 602 |
SaveLiveStateHandler *save_live_state, |
| 603 |
SaveStateHandler *save_state, |
| 604 |
LoadStateHandler *load_state, |
| 605 |
void *opaque)
|
| 606 |
{
|
| 607 |
SaveStateEntry *se, **pse; |
| 608 |
static int global_section_id; |
| 609 |
|
| 610 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
| 611 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
| 612 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
| 613 |
se->version_id = version_id; |
| 614 |
se->section_id = global_section_id++; |
| 615 |
se->save_live_state = save_live_state; |
| 616 |
se->save_state = save_state; |
| 617 |
se->load_state = load_state; |
| 618 |
se->opaque = opaque; |
| 619 |
se->next = NULL;
|
| 620 |
|
| 621 |
/* add at the end of list */
|
| 622 |
pse = &first_se; |
| 623 |
while (*pse != NULL) { |
| 624 |
if (instance_id == -1 |
| 625 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
| 626 |
&& se->instance_id <= (*pse)->instance_id) |
| 627 |
se->instance_id = (*pse)->instance_id + 1;
|
| 628 |
pse = &(*pse)->next; |
| 629 |
} |
| 630 |
*pse = se; |
| 631 |
return 0; |
| 632 |
} |
| 633 |
|
| 634 |
int register_savevm(const char *idstr, |
| 635 |
int instance_id,
|
| 636 |
int version_id,
|
| 637 |
SaveStateHandler *save_state, |
| 638 |
LoadStateHandler *load_state, |
| 639 |
void *opaque)
|
| 640 |
{
|
| 641 |
return register_savevm_live(idstr, instance_id, version_id,
|
| 642 |
NULL, save_state, load_state, opaque);
|
| 643 |
} |
| 644 |
|
| 645 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
| 646 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
| 647 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
| 648 |
|
| 649 |
#define QEMU_VM_EOF 0x00 |
| 650 |
#define QEMU_VM_SECTION_START 0x01 |
| 651 |
#define QEMU_VM_SECTION_PART 0x02 |
| 652 |
#define QEMU_VM_SECTION_END 0x03 |
| 653 |
#define QEMU_VM_SECTION_FULL 0x04 |
| 654 |
|
| 655 |
int qemu_savevm_state_begin(QEMUFile *f)
|
| 656 |
{
|
| 657 |
SaveStateEntry *se; |
| 658 |
|
| 659 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| 660 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| 661 |
|
| 662 |
for (se = first_se; se != NULL; se = se->next) { |
| 663 |
int len;
|
| 664 |
|
| 665 |
if (se->save_live_state == NULL) |
| 666 |
continue;
|
| 667 |
|
| 668 |
/* Section type */
|
| 669 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
| 670 |
qemu_put_be32(f, se->section_id); |
| 671 |
|
| 672 |
/* ID string */
|
| 673 |
len = strlen(se->idstr); |
| 674 |
qemu_put_byte(f, len); |
| 675 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 676 |
|
| 677 |
qemu_put_be32(f, se->instance_id); |
| 678 |
qemu_put_be32(f, se->version_id); |
| 679 |
|
| 680 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
| 681 |
} |
| 682 |
|
| 683 |
if (qemu_file_has_error(f))
|
| 684 |
return -EIO;
|
| 685 |
|
| 686 |
return 0; |
| 687 |
} |
| 688 |
|
| 689 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
| 690 |
{
|
| 691 |
SaveStateEntry *se; |
| 692 |
int ret = 1; |
| 693 |
|
| 694 |
for (se = first_se; se != NULL; se = se->next) { |
| 695 |
if (se->save_live_state == NULL) |
| 696 |
continue;
|
| 697 |
|
| 698 |
/* Section type */
|
| 699 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
| 700 |
qemu_put_be32(f, se->section_id); |
| 701 |
|
| 702 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
| 703 |
} |
| 704 |
|
| 705 |
if (ret)
|
| 706 |
return 1; |
| 707 |
|
| 708 |
if (qemu_file_has_error(f))
|
| 709 |
return -EIO;
|
| 710 |
|
| 711 |
return 0; |
| 712 |
} |
| 713 |
|
| 714 |
int qemu_savevm_state_complete(QEMUFile *f)
|
| 715 |
{
|
| 716 |
SaveStateEntry *se; |
| 717 |
|
| 718 |
for (se = first_se; se != NULL; se = se->next) { |
| 719 |
if (se->save_live_state == NULL) |
| 720 |
continue;
|
| 721 |
|
| 722 |
/* Section type */
|
| 723 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
| 724 |
qemu_put_be32(f, se->section_id); |
| 725 |
|
| 726 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
| 727 |
} |
| 728 |
|
| 729 |
for(se = first_se; se != NULL; se = se->next) { |
| 730 |
int len;
|
| 731 |
|
| 732 |
if (se->save_state == NULL) |
| 733 |
continue;
|
| 734 |
|
| 735 |
/* Section type */
|
| 736 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
| 737 |
qemu_put_be32(f, se->section_id); |
| 738 |
|
| 739 |
/* ID string */
|
| 740 |
len = strlen(se->idstr); |
| 741 |
qemu_put_byte(f, len); |
| 742 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
| 743 |
|
| 744 |
qemu_put_be32(f, se->instance_id); |
| 745 |
qemu_put_be32(f, se->version_id); |
| 746 |
|
| 747 |
se->save_state(f, se->opaque); |
| 748 |
} |
| 749 |
|
| 750 |
qemu_put_byte(f, QEMU_VM_EOF); |
| 751 |
|
| 752 |
if (qemu_file_has_error(f))
|
| 753 |
return -EIO;
|
| 754 |
|
| 755 |
return 0; |
| 756 |
} |
| 757 |
|
| 758 |
int qemu_savevm_state(QEMUFile *f)
|
| 759 |
{
|
| 760 |
int saved_vm_running;
|
| 761 |
int ret;
|
| 762 |
|
| 763 |
saved_vm_running = vm_running; |
| 764 |
vm_stop(0);
|
| 765 |
|
| 766 |
bdrv_flush_all(); |
| 767 |
|
| 768 |
ret = qemu_savevm_state_begin(f); |
| 769 |
if (ret < 0) |
| 770 |
goto out;
|
| 771 |
|
| 772 |
do {
|
| 773 |
ret = qemu_savevm_state_iterate(f); |
| 774 |
if (ret < 0) |
| 775 |
goto out;
|
| 776 |
} while (ret == 0); |
| 777 |
|
| 778 |
ret = qemu_savevm_state_complete(f); |
| 779 |
|
| 780 |
out:
|
| 781 |
if (qemu_file_has_error(f))
|
| 782 |
ret = -EIO; |
| 783 |
|
| 784 |
if (!ret && saved_vm_running)
|
| 785 |
vm_start(); |
| 786 |
|
| 787 |
return ret;
|
| 788 |
} |
| 789 |
|
| 790 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
| 791 |
{
|
| 792 |
SaveStateEntry *se; |
| 793 |
|
| 794 |
for(se = first_se; se != NULL; se = se->next) { |
| 795 |
if (!strcmp(se->idstr, idstr) &&
|
| 796 |
instance_id == se->instance_id) |
| 797 |
return se;
|
| 798 |
} |
| 799 |
return NULL; |
| 800 |
} |
| 801 |
|
| 802 |
typedef struct LoadStateEntry { |
| 803 |
SaveStateEntry *se; |
| 804 |
int section_id;
|
| 805 |
int version_id;
|
| 806 |
struct LoadStateEntry *next;
|
| 807 |
} LoadStateEntry; |
| 808 |
|
| 809 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
| 810 |
{
|
| 811 |
SaveStateEntry *se; |
| 812 |
int len, ret, instance_id, record_len, version_id;
|
| 813 |
int64_t total_len, end_pos, cur_pos; |
| 814 |
char idstr[256]; |
| 815 |
|
| 816 |
total_len = qemu_get_be64(f); |
| 817 |
end_pos = total_len + qemu_ftell(f); |
| 818 |
for(;;) {
|
| 819 |
if (qemu_ftell(f) >= end_pos)
|
| 820 |
break;
|
| 821 |
len = qemu_get_byte(f); |
| 822 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 823 |
idstr[len] = '\0';
|
| 824 |
instance_id = qemu_get_be32(f); |
| 825 |
version_id = qemu_get_be32(f); |
| 826 |
record_len = qemu_get_be32(f); |
| 827 |
cur_pos = qemu_ftell(f); |
| 828 |
se = find_se(idstr, instance_id); |
| 829 |
if (!se) {
|
| 830 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
| 831 |
instance_id, idstr); |
| 832 |
} else {
|
| 833 |
ret = se->load_state(f, se->opaque, version_id); |
| 834 |
if (ret < 0) { |
| 835 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
| 836 |
instance_id, idstr); |
| 837 |
} |
| 838 |
} |
| 839 |
/* always seek to exact end of record */
|
| 840 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
| 841 |
} |
| 842 |
|
| 843 |
if (qemu_file_has_error(f))
|
| 844 |
return -EIO;
|
| 845 |
|
| 846 |
return 0; |
| 847 |
} |
| 848 |
|
| 849 |
int qemu_loadvm_state(QEMUFile *f)
|
| 850 |
{
|
| 851 |
LoadStateEntry *first_le = NULL;
|
| 852 |
uint8_t section_type; |
| 853 |
unsigned int v; |
| 854 |
int ret;
|
| 855 |
|
| 856 |
v = qemu_get_be32(f); |
| 857 |
if (v != QEMU_VM_FILE_MAGIC)
|
| 858 |
return -EINVAL;
|
| 859 |
|
| 860 |
v = qemu_get_be32(f); |
| 861 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
| 862 |
return qemu_loadvm_state_v2(f);
|
| 863 |
if (v != QEMU_VM_FILE_VERSION)
|
| 864 |
return -ENOTSUP;
|
| 865 |
|
| 866 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
| 867 |
uint32_t instance_id, version_id, section_id; |
| 868 |
LoadStateEntry *le; |
| 869 |
SaveStateEntry *se; |
| 870 |
char idstr[257]; |
| 871 |
int len;
|
| 872 |
|
| 873 |
switch (section_type) {
|
| 874 |
case QEMU_VM_SECTION_START:
|
| 875 |
case QEMU_VM_SECTION_FULL:
|
| 876 |
/* Read section start */
|
| 877 |
section_id = qemu_get_be32(f); |
| 878 |
len = qemu_get_byte(f); |
| 879 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
| 880 |
idstr[len] = 0;
|
| 881 |
instance_id = qemu_get_be32(f); |
| 882 |
version_id = qemu_get_be32(f); |
| 883 |
|
| 884 |
/* Find savevm section */
|
| 885 |
se = find_se(idstr, instance_id); |
| 886 |
if (se == NULL) { |
| 887 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
| 888 |
ret = -EINVAL; |
| 889 |
goto out;
|
| 890 |
} |
| 891 |
|
| 892 |
/* Validate version */
|
| 893 |
if (version_id > se->version_id) {
|
| 894 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
| 895 |
version_id, idstr, se->version_id); |
| 896 |
ret = -EINVAL; |
| 897 |
goto out;
|
| 898 |
} |
| 899 |
|
| 900 |
/* Add entry */
|
| 901 |
le = qemu_mallocz(sizeof(*le));
|
| 902 |
|
| 903 |
le->se = se; |
| 904 |
le->section_id = section_id; |
| 905 |
le->version_id = version_id; |
| 906 |
le->next = first_le; |
| 907 |
first_le = le; |
| 908 |
|
| 909 |
le->se->load_state(f, le->se->opaque, le->version_id); |
| 910 |
break;
|
| 911 |
case QEMU_VM_SECTION_PART:
|
| 912 |
case QEMU_VM_SECTION_END:
|
| 913 |
section_id = qemu_get_be32(f); |
| 914 |
|
| 915 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
| 916 |
if (le == NULL) { |
| 917 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
| 918 |
ret = -EINVAL; |
| 919 |
goto out;
|
| 920 |
} |
| 921 |
|
| 922 |
le->se->load_state(f, le->se->opaque, le->version_id); |
| 923 |
break;
|
| 924 |
default:
|
| 925 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
| 926 |
ret = -EINVAL; |
| 927 |
goto out;
|
| 928 |
} |
| 929 |
} |
| 930 |
|
| 931 |
ret = 0;
|
| 932 |
|
| 933 |
out:
|
| 934 |
while (first_le) {
|
| 935 |
LoadStateEntry *le = first_le; |
| 936 |
first_le = first_le->next; |
| 937 |
qemu_free(le); |
| 938 |
} |
| 939 |
|
| 940 |
if (qemu_file_has_error(f))
|
| 941 |
ret = -EIO; |
| 942 |
|
| 943 |
return ret;
|
| 944 |
} |
| 945 |
|
| 946 |
/* device can contain snapshots */
|
| 947 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
| 948 |
{
|
| 949 |
return (bs &&
|
| 950 |
!bdrv_is_removable(bs) && |
| 951 |
!bdrv_is_read_only(bs)); |
| 952 |
} |
| 953 |
|
| 954 |
/* device must be snapshots in order to have a reliable snapshot */
|
| 955 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
| 956 |
{
|
| 957 |
return (bs &&
|
| 958 |
!bdrv_is_removable(bs) && |
| 959 |
!bdrv_is_read_only(bs)); |
| 960 |
} |
| 961 |
|
| 962 |
static BlockDriverState *get_bs_snapshots(void) |
| 963 |
{
|
| 964 |
BlockDriverState *bs; |
| 965 |
int i;
|
| 966 |
|
| 967 |
if (bs_snapshots)
|
| 968 |
return bs_snapshots;
|
| 969 |
for(i = 0; i <= nb_drives; i++) { |
| 970 |
bs = drives_table[i].bdrv; |
| 971 |
if (bdrv_can_snapshot(bs))
|
| 972 |
goto ok;
|
| 973 |
} |
| 974 |
return NULL; |
| 975 |
ok:
|
| 976 |
bs_snapshots = bs; |
| 977 |
return bs;
|
| 978 |
} |
| 979 |
|
| 980 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
| 981 |
const char *name) |
| 982 |
{
|
| 983 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 984 |
int nb_sns, i, ret;
|
| 985 |
|
| 986 |
ret = -ENOENT; |
| 987 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 988 |
if (nb_sns < 0) |
| 989 |
return ret;
|
| 990 |
for(i = 0; i < nb_sns; i++) { |
| 991 |
sn = &sn_tab[i]; |
| 992 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
| 993 |
*sn_info = *sn; |
| 994 |
ret = 0;
|
| 995 |
break;
|
| 996 |
} |
| 997 |
} |
| 998 |
qemu_free(sn_tab); |
| 999 |
return ret;
|
| 1000 |
} |
| 1001 |
|
| 1002 |
void do_savevm(Monitor *mon, const char *name) |
| 1003 |
{
|
| 1004 |
BlockDriverState *bs, *bs1; |
| 1005 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| 1006 |
int must_delete, ret, i;
|
| 1007 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1008 |
QEMUFile *f; |
| 1009 |
int saved_vm_running;
|
| 1010 |
uint32_t vm_state_size; |
| 1011 |
#ifdef _WIN32
|
| 1012 |
struct _timeb tb;
|
| 1013 |
#else
|
| 1014 |
struct timeval tv;
|
| 1015 |
#endif
|
| 1016 |
|
| 1017 |
bs = get_bs_snapshots(); |
| 1018 |
if (!bs) {
|
| 1019 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
| 1020 |
return;
|
| 1021 |
} |
| 1022 |
|
| 1023 |
/* ??? Should this occur after vm_stop? */
|
| 1024 |
qemu_aio_flush(); |
| 1025 |
|
| 1026 |
saved_vm_running = vm_running; |
| 1027 |
vm_stop(0);
|
| 1028 |
|
| 1029 |
must_delete = 0;
|
| 1030 |
if (name) {
|
| 1031 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
| 1032 |
if (ret >= 0) { |
| 1033 |
must_delete = 1;
|
| 1034 |
} |
| 1035 |
} |
| 1036 |
memset(sn, 0, sizeof(*sn)); |
| 1037 |
if (must_delete) {
|
| 1038 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
| 1039 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
| 1040 |
} else {
|
| 1041 |
if (name)
|
| 1042 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
| 1043 |
} |
| 1044 |
|
| 1045 |
/* fill auxiliary fields */
|
| 1046 |
#ifdef _WIN32
|
| 1047 |
_ftime(&tb); |
| 1048 |
sn->date_sec = tb.time; |
| 1049 |
sn->date_nsec = tb.millitm * 1000000;
|
| 1050 |
#else
|
| 1051 |
gettimeofday(&tv, NULL);
|
| 1052 |
sn->date_sec = tv.tv_sec; |
| 1053 |
sn->date_nsec = tv.tv_usec * 1000;
|
| 1054 |
#endif
|
| 1055 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
| 1056 |
|
| 1057 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1058 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
| 1059 |
bdrv_get_device_name(bs)); |
| 1060 |
goto the_end;
|
| 1061 |
} |
| 1062 |
|
| 1063 |
/* save the VM state */
|
| 1064 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
| 1065 |
if (!f) {
|
| 1066 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1067 |
goto the_end;
|
| 1068 |
} |
| 1069 |
ret = qemu_savevm_state(f); |
| 1070 |
vm_state_size = qemu_ftell(f); |
| 1071 |
qemu_fclose(f); |
| 1072 |
if (ret < 0) { |
| 1073 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
| 1074 |
goto the_end;
|
| 1075 |
} |
| 1076 |
|
| 1077 |
/* create the snapshots */
|
| 1078 |
|
| 1079 |
for(i = 0; i < nb_drives; i++) { |
| 1080 |
bs1 = drives_table[i].bdrv; |
| 1081 |
if (bdrv_has_snapshot(bs1)) {
|
| 1082 |
if (must_delete) {
|
| 1083 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
| 1084 |
if (ret < 0) { |
| 1085 |
monitor_printf(mon, |
| 1086 |
"Error while deleting snapshot on '%s'\n",
|
| 1087 |
bdrv_get_device_name(bs1)); |
| 1088 |
} |
| 1089 |
} |
| 1090 |
/* Write VM state size only to the image that contains the state */
|
| 1091 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
| 1092 |
ret = bdrv_snapshot_create(bs1, sn); |
| 1093 |
if (ret < 0) { |
| 1094 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
| 1095 |
bdrv_get_device_name(bs1)); |
| 1096 |
} |
| 1097 |
} |
| 1098 |
} |
| 1099 |
|
| 1100 |
the_end:
|
| 1101 |
if (saved_vm_running)
|
| 1102 |
vm_start(); |
| 1103 |
} |
| 1104 |
|
| 1105 |
void do_loadvm(Monitor *mon, const char *name) |
| 1106 |
{
|
| 1107 |
BlockDriverState *bs, *bs1; |
| 1108 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
| 1109 |
QEMUSnapshotInfo sn; |
| 1110 |
QEMUFile *f; |
| 1111 |
int i, ret;
|
| 1112 |
int saved_vm_running;
|
| 1113 |
|
| 1114 |
bs = get_bs_snapshots(); |
| 1115 |
if (!bs) {
|
| 1116 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1117 |
return;
|
| 1118 |
} |
| 1119 |
|
| 1120 |
/* Flush all IO requests so they don't interfere with the new state. */
|
| 1121 |
qemu_aio_flush(); |
| 1122 |
|
| 1123 |
saved_vm_running = vm_running; |
| 1124 |
vm_stop(0);
|
| 1125 |
|
| 1126 |
for(i = 0; i <= nb_drives; i++) { |
| 1127 |
bs1 = drives_table[i].bdrv; |
| 1128 |
if (bdrv_has_snapshot(bs1)) {
|
| 1129 |
ret = bdrv_snapshot_goto(bs1, name); |
| 1130 |
if (ret < 0) { |
| 1131 |
if (bs != bs1)
|
| 1132 |
monitor_printf(mon, "Warning: ");
|
| 1133 |
switch(ret) {
|
| 1134 |
case -ENOTSUP:
|
| 1135 |
monitor_printf(mon, |
| 1136 |
"Snapshots not supported on device '%s'\n",
|
| 1137 |
bdrv_get_device_name(bs1)); |
| 1138 |
break;
|
| 1139 |
case -ENOENT:
|
| 1140 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
| 1141 |
"device '%s'\n",
|
| 1142 |
name, bdrv_get_device_name(bs1)); |
| 1143 |
break;
|
| 1144 |
default:
|
| 1145 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
| 1146 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1147 |
break;
|
| 1148 |
} |
| 1149 |
/* fatal on snapshot block device */
|
| 1150 |
if (bs == bs1)
|
| 1151 |
goto the_end;
|
| 1152 |
} |
| 1153 |
} |
| 1154 |
} |
| 1155 |
|
| 1156 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
| 1157 |
monitor_printf(mon, "Device %s does not support VM state snapshots\n",
|
| 1158 |
bdrv_get_device_name(bs)); |
| 1159 |
return;
|
| 1160 |
} |
| 1161 |
|
| 1162 |
/* Don't even try to load empty VM states */
|
| 1163 |
ret = bdrv_snapshot_find(bs, &sn, name); |
| 1164 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
| 1165 |
goto the_end;
|
| 1166 |
|
| 1167 |
/* restore the VM state */
|
| 1168 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
| 1169 |
if (!f) {
|
| 1170 |
monitor_printf(mon, "Could not open VM state file\n");
|
| 1171 |
goto the_end;
|
| 1172 |
} |
| 1173 |
ret = qemu_loadvm_state(f); |
| 1174 |
qemu_fclose(f); |
| 1175 |
if (ret < 0) { |
| 1176 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
| 1177 |
} |
| 1178 |
the_end:
|
| 1179 |
if (saved_vm_running)
|
| 1180 |
vm_start(); |
| 1181 |
} |
| 1182 |
|
| 1183 |
void do_delvm(Monitor *mon, const char *name) |
| 1184 |
{
|
| 1185 |
BlockDriverState *bs, *bs1; |
| 1186 |
int i, ret;
|
| 1187 |
|
| 1188 |
bs = get_bs_snapshots(); |
| 1189 |
if (!bs) {
|
| 1190 |
monitor_printf(mon, "No block device supports snapshots\n");
|
| 1191 |
return;
|
| 1192 |
} |
| 1193 |
|
| 1194 |
for(i = 0; i <= nb_drives; i++) { |
| 1195 |
bs1 = drives_table[i].bdrv; |
| 1196 |
if (bdrv_has_snapshot(bs1)) {
|
| 1197 |
ret = bdrv_snapshot_delete(bs1, name); |
| 1198 |
if (ret < 0) { |
| 1199 |
if (ret == -ENOTSUP)
|
| 1200 |
monitor_printf(mon, |
| 1201 |
"Snapshots not supported on device '%s'\n",
|
| 1202 |
bdrv_get_device_name(bs1)); |
| 1203 |
else
|
| 1204 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
| 1205 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
| 1206 |
} |
| 1207 |
} |
| 1208 |
} |
| 1209 |
} |
| 1210 |
|
| 1211 |
void do_info_snapshots(Monitor *mon)
|
| 1212 |
{
|
| 1213 |
BlockDriverState *bs, *bs1; |
| 1214 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1215 |
int nb_sns, i;
|
| 1216 |
char buf[256]; |
| 1217 |
|
| 1218 |
bs = get_bs_snapshots(); |
| 1219 |
if (!bs) {
|
| 1220 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
| 1221 |
return;
|
| 1222 |
} |
| 1223 |
monitor_printf(mon, "Snapshot devices:");
|
| 1224 |
for(i = 0; i <= nb_drives; i++) { |
| 1225 |
bs1 = drives_table[i].bdrv; |
| 1226 |
if (bdrv_has_snapshot(bs1)) {
|
| 1227 |
if (bs == bs1)
|
| 1228 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
| 1229 |
} |
| 1230 |
} |
| 1231 |
monitor_printf(mon, "\n");
|
| 1232 |
|
| 1233 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1234 |
if (nb_sns < 0) { |
| 1235 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
| 1236 |
return;
|
| 1237 |
} |
| 1238 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
| 1239 |
bdrv_get_device_name(bs)); |
| 1240 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1241 |
for(i = 0; i < nb_sns; i++) { |
| 1242 |
sn = &sn_tab[i]; |
| 1243 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1244 |
} |
| 1245 |
qemu_free(sn_tab); |
| 1246 |
} |