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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 "qemu-common.h" |
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#include "hw/hw.h" |
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#include "net.h" |
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#include "console.h" |
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#include "sysemu.h" |
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#include "qemu-timer.h" |
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#include "qemu-char.h" |
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#include "block.h" |
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#include "audio/audio.h" |
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#include "migration.h" |
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#include "qemu_socket.h" |
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#include <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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|
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#ifndef _WIN32
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#include <sys/times.h> |
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#include <sys/wait.h> |
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#include <termios.h> |
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#include <sys/mman.h> |
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#include <sys/ioctl.h> |
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#include <sys/resource.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <net/if.h> |
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#if defined(__NetBSD__)
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#include <net/if_tap.h> |
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#endif
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#ifdef __linux__
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#include <linux/if_tun.h> |
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#endif
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#include <arpa/inet.h> |
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#include <dirent.h> |
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#include <netdb.h> |
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#include <sys/select.h> |
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#ifdef _BSD
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#include <sys/stat.h> |
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#ifdef __FreeBSD__
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#include <libutil.h> |
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#else
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#include <util.h> |
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#endif
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#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
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#include <freebsd/stdlib.h> |
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#else
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#ifdef __linux__
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#include <pty.h> |
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#include <malloc.h> |
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#include <linux/rtc.h> |
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#endif
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#endif
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#endif
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#ifdef _WIN32
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#include <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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/* 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 |
97 |
|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{ |
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uint32_t magic = EXPERIMENTAL_MAGIC; |
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uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
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/* FIXME: should we send a different packet (arp/rarp/ping)? */
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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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return 18; /* len */ |
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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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for (i = 0; i < nb_nics; i++) { |
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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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#define IO_BUF_SIZE 32768 |
135 |
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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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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]; |
149 |
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int has_error;
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}; |
152 |
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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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typedef struct QEMUFileSocket |
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{ |
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int fd;
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QEMUFile *file; |
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} QEMUFileSocket; |
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static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileSocket *s = opaque; |
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ssize_t len; |
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do {
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len = recv(s->fd, buf, size, 0);
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} while (len == -1 && socket_error() == EINTR); |
173 |
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if (len == -1) |
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len = -socket_error(); |
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return len;
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} |
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static int socket_close(void *opaque) |
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{ |
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QEMUFileSocket *s = opaque; |
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qemu_free(s); |
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return 0; |
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} |
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static int 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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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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} |
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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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} |
206 |
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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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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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s = qemu_mallocz(sizeof(QEMUFilePopen));
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s->popen_file = popen_file; |
219 |
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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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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
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{ |
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FILE *popen_file; |
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popen_file = popen(command, mode); |
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if(popen_file == NULL) { |
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return NULL; |
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} |
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return qemu_popen(popen_file, mode);
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} |
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QEMUFile *qemu_fopen_socket(int fd)
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{ |
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QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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s->fd = fd; |
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s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL); |
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return s->file;
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} |
249 |
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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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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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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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} |
270 |
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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); |
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return 0; |
277 |
} |
278 |
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QEMUFile *qemu_fopen(const char *filename, const char *mode) |
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{ |
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QEMUFileStdio *s; |
282 |
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->outfile = fopen(filename, mode); |
286 |
if (!s->outfile)
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goto fail;
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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); |
293 |
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fail:
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if (s->outfile)
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fclose(s->outfile); |
297 |
qemu_free(s); |
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return NULL; |
299 |
} |
300 |
|
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typedef struct QEMUFileBdrv |
302 |
{ |
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BlockDriverState *bs; |
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int64_t base_offset; |
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} QEMUFileBdrv; |
306 |
|
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static int bdrv_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; |
311 |
bdrv_pwrite(s->bs, s->base_offset + pos, buf, size); |
312 |
return size;
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} |
314 |
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static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
316 |
{ |
317 |
QEMUFileBdrv *s = opaque; |
318 |
return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
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} |
320 |
|
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static int bdrv_fclose(void *opaque) |
322 |
{ |
323 |
QEMUFileBdrv *s = opaque; |
324 |
qemu_free(s); |
325 |
return 0; |
326 |
} |
327 |
|
328 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
329 |
{ |
330 |
QEMUFileBdrv *s; |
331 |
|
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s = qemu_mallocz(sizeof(QEMUFileBdrv));
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|
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s->bs = bs; |
335 |
s->base_offset = offset; |
336 |
|
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if (is_writable)
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return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL); |
339 |
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return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL); |
341 |
} |
342 |
|
343 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
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QEMUFileGetBufferFunc *get_buffer, |
345 |
QEMUFileCloseFunc *close, |
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QEMUFileRateLimit *rate_limit) |
347 |
{ |
348 |
QEMUFile *f; |
349 |
|
350 |
f = qemu_mallocz(sizeof(QEMUFile));
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f->opaque = opaque; |
353 |
f->put_buffer = put_buffer; |
354 |
f->get_buffer = get_buffer; |
355 |
f->close = close; |
356 |
f->rate_limit = rate_limit; |
357 |
f->is_write = 0;
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358 |
|
359 |
return f;
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360 |
} |
361 |
|
362 |
int qemu_file_has_error(QEMUFile *f)
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363 |
{ |
364 |
return f->has_error;
|
365 |
} |
366 |
|
367 |
void qemu_fflush(QEMUFile *f)
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368 |
{ |
369 |
if (!f->put_buffer)
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370 |
return;
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371 |
|
372 |
if (f->is_write && f->buf_index > 0) { |
373 |
int len;
|
374 |
|
375 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
376 |
if (len > 0) |
377 |
f->buf_offset += f->buf_index; |
378 |
else
|
379 |
f->has_error = 1;
|
380 |
f->buf_index = 0;
|
381 |
} |
382 |
} |
383 |
|
384 |
static void qemu_fill_buffer(QEMUFile *f) |
385 |
{ |
386 |
int len;
|
387 |
|
388 |
if (!f->get_buffer)
|
389 |
return;
|
390 |
|
391 |
if (f->is_write)
|
392 |
abort(); |
393 |
|
394 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
395 |
if (len > 0) { |
396 |
f->buf_index = 0;
|
397 |
f->buf_size = len; |
398 |
f->buf_offset += len; |
399 |
} else if (len != -EAGAIN) |
400 |
f->has_error = 1;
|
401 |
} |
402 |
|
403 |
int qemu_fclose(QEMUFile *f)
|
404 |
{ |
405 |
int ret = 0; |
406 |
qemu_fflush(f); |
407 |
if (f->close)
|
408 |
ret = f->close(f->opaque); |
409 |
qemu_free(f); |
410 |
return ret;
|
411 |
} |
412 |
|
413 |
void qemu_file_put_notify(QEMUFile *f)
|
414 |
{ |
415 |
f->put_buffer(f->opaque, NULL, 0, 0); |
416 |
} |
417 |
|
418 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
419 |
{ |
420 |
int l;
|
421 |
|
422 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
423 |
fprintf(stderr, |
424 |
"Attempted to write to buffer while read buffer is not empty\n");
|
425 |
abort(); |
426 |
} |
427 |
|
428 |
while (!f->has_error && size > 0) { |
429 |
l = IO_BUF_SIZE - f->buf_index; |
430 |
if (l > size)
|
431 |
l = size; |
432 |
memcpy(f->buf + f->buf_index, buf, l); |
433 |
f->is_write = 1;
|
434 |
f->buf_index += l; |
435 |
buf += l; |
436 |
size -= l; |
437 |
if (f->buf_index >= IO_BUF_SIZE)
|
438 |
qemu_fflush(f); |
439 |
} |
440 |
} |
441 |
|
442 |
void qemu_put_byte(QEMUFile *f, int v) |
443 |
{ |
444 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
445 |
fprintf(stderr, |
446 |
"Attempted to write to buffer while read buffer is not empty\n");
|
447 |
abort(); |
448 |
} |
449 |
|
450 |
f->buf[f->buf_index++] = v; |
451 |
f->is_write = 1;
|
452 |
if (f->buf_index >= IO_BUF_SIZE)
|
453 |
qemu_fflush(f); |
454 |
} |
455 |
|
456 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
457 |
{ |
458 |
int size, l;
|
459 |
|
460 |
if (f->is_write)
|
461 |
abort(); |
462 |
|
463 |
size = size1; |
464 |
while (size > 0) { |
465 |
l = f->buf_size - f->buf_index; |
466 |
if (l == 0) { |
467 |
qemu_fill_buffer(f); |
468 |
l = f->buf_size - f->buf_index; |
469 |
if (l == 0) |
470 |
break;
|
471 |
} |
472 |
if (l > size)
|
473 |
l = size; |
474 |
memcpy(buf, f->buf + f->buf_index, l); |
475 |
f->buf_index += l; |
476 |
buf += l; |
477 |
size -= l; |
478 |
} |
479 |
return size1 - size;
|
480 |
} |
481 |
|
482 |
int qemu_get_byte(QEMUFile *f)
|
483 |
{ |
484 |
if (f->is_write)
|
485 |
abort(); |
486 |
|
487 |
if (f->buf_index >= f->buf_size) {
|
488 |
qemu_fill_buffer(f); |
489 |
if (f->buf_index >= f->buf_size)
|
490 |
return 0; |
491 |
} |
492 |
return f->buf[f->buf_index++];
|
493 |
} |
494 |
|
495 |
int64_t qemu_ftell(QEMUFile *f) |
496 |
{ |
497 |
return f->buf_offset - f->buf_size + f->buf_index;
|
498 |
} |
499 |
|
500 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
501 |
{ |
502 |
if (whence == SEEK_SET) {
|
503 |
/* nothing to do */
|
504 |
} else if (whence == SEEK_CUR) { |
505 |
pos += qemu_ftell(f); |
506 |
} else {
|
507 |
/* SEEK_END not supported */
|
508 |
return -1; |
509 |
} |
510 |
if (f->put_buffer) {
|
511 |
qemu_fflush(f); |
512 |
f->buf_offset = pos; |
513 |
} else {
|
514 |
f->buf_offset = pos; |
515 |
f->buf_index = 0;
|
516 |
f->buf_size = 0;
|
517 |
} |
518 |
return pos;
|
519 |
} |
520 |
|
521 |
int qemu_file_rate_limit(QEMUFile *f)
|
522 |
{ |
523 |
if (f->rate_limit)
|
524 |
return f->rate_limit(f->opaque);
|
525 |
|
526 |
return 0; |
527 |
} |
528 |
|
529 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
530 |
{ |
531 |
qemu_put_byte(f, v >> 8);
|
532 |
qemu_put_byte(f, v); |
533 |
} |
534 |
|
535 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
536 |
{ |
537 |
qemu_put_byte(f, v >> 24);
|
538 |
qemu_put_byte(f, v >> 16);
|
539 |
qemu_put_byte(f, v >> 8);
|
540 |
qemu_put_byte(f, v); |
541 |
} |
542 |
|
543 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
544 |
{ |
545 |
qemu_put_be32(f, v >> 32);
|
546 |
qemu_put_be32(f, v); |
547 |
} |
548 |
|
549 |
unsigned int qemu_get_be16(QEMUFile *f) |
550 |
{ |
551 |
unsigned int v; |
552 |
v = qemu_get_byte(f) << 8;
|
553 |
v |= qemu_get_byte(f); |
554 |
return v;
|
555 |
} |
556 |
|
557 |
unsigned int qemu_get_be32(QEMUFile *f) |
558 |
{ |
559 |
unsigned int v; |
560 |
v = qemu_get_byte(f) << 24;
|
561 |
v |= qemu_get_byte(f) << 16;
|
562 |
v |= qemu_get_byte(f) << 8;
|
563 |
v |= qemu_get_byte(f); |
564 |
return v;
|
565 |
} |
566 |
|
567 |
uint64_t qemu_get_be64(QEMUFile *f) |
568 |
{ |
569 |
uint64_t v; |
570 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
571 |
v |= qemu_get_be32(f); |
572 |
return v;
|
573 |
} |
574 |
|
575 |
typedef struct SaveStateEntry { |
576 |
char idstr[256]; |
577 |
int instance_id;
|
578 |
int version_id;
|
579 |
int section_id;
|
580 |
SaveLiveStateHandler *save_live_state; |
581 |
SaveStateHandler *save_state; |
582 |
LoadStateHandler *load_state; |
583 |
void *opaque;
|
584 |
struct SaveStateEntry *next;
|
585 |
} SaveStateEntry; |
586 |
|
587 |
static SaveStateEntry *first_se;
|
588 |
|
589 |
/* TODO: Individual devices generally have very little idea about the rest
|
590 |
of the system, so instance_id should be removed/replaced.
|
591 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
592 |
distinguishing id for all instances of your device class. */
|
593 |
int register_savevm_live(const char *idstr, |
594 |
int instance_id,
|
595 |
int version_id,
|
596 |
SaveLiveStateHandler *save_live_state, |
597 |
SaveStateHandler *save_state, |
598 |
LoadStateHandler *load_state, |
599 |
void *opaque)
|
600 |
{ |
601 |
SaveStateEntry *se, **pse; |
602 |
static int global_section_id; |
603 |
|
604 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
605 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
606 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
607 |
se->version_id = version_id; |
608 |
se->section_id = global_section_id++; |
609 |
se->save_live_state = save_live_state; |
610 |
se->save_state = save_state; |
611 |
se->load_state = load_state; |
612 |
se->opaque = opaque; |
613 |
se->next = NULL;
|
614 |
|
615 |
/* add at the end of list */
|
616 |
pse = &first_se; |
617 |
while (*pse != NULL) { |
618 |
if (instance_id == -1 |
619 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
620 |
&& se->instance_id <= (*pse)->instance_id) |
621 |
se->instance_id = (*pse)->instance_id + 1;
|
622 |
pse = &(*pse)->next; |
623 |
} |
624 |
*pse = se; |
625 |
return 0; |
626 |
} |
627 |
|
628 |
int register_savevm(const char *idstr, |
629 |
int instance_id,
|
630 |
int version_id,
|
631 |
SaveStateHandler *save_state, |
632 |
LoadStateHandler *load_state, |
633 |
void *opaque)
|
634 |
{ |
635 |
return register_savevm_live(idstr, instance_id, version_id,
|
636 |
NULL, save_state, load_state, opaque);
|
637 |
} |
638 |
|
639 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
640 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
641 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
642 |
|
643 |
#define QEMU_VM_EOF 0x00 |
644 |
#define QEMU_VM_SECTION_START 0x01 |
645 |
#define QEMU_VM_SECTION_PART 0x02 |
646 |
#define QEMU_VM_SECTION_END 0x03 |
647 |
#define QEMU_VM_SECTION_FULL 0x04 |
648 |
|
649 |
int qemu_savevm_state_begin(QEMUFile *f)
|
650 |
{ |
651 |
SaveStateEntry *se; |
652 |
|
653 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
654 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
655 |
|
656 |
for (se = first_se; se != NULL; se = se->next) { |
657 |
int len;
|
658 |
|
659 |
if (se->save_live_state == NULL) |
660 |
continue;
|
661 |
|
662 |
/* Section type */
|
663 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
664 |
qemu_put_be32(f, se->section_id); |
665 |
|
666 |
/* ID string */
|
667 |
len = strlen(se->idstr); |
668 |
qemu_put_byte(f, len); |
669 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
670 |
|
671 |
qemu_put_be32(f, se->instance_id); |
672 |
qemu_put_be32(f, se->version_id); |
673 |
|
674 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
675 |
} |
676 |
|
677 |
if (qemu_file_has_error(f))
|
678 |
return -EIO;
|
679 |
|
680 |
return 0; |
681 |
} |
682 |
|
683 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
684 |
{ |
685 |
SaveStateEntry *se; |
686 |
int ret = 1; |
687 |
|
688 |
for (se = first_se; se != NULL; se = se->next) { |
689 |
if (se->save_live_state == NULL) |
690 |
continue;
|
691 |
|
692 |
/* Section type */
|
693 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
694 |
qemu_put_be32(f, se->section_id); |
695 |
|
696 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
697 |
} |
698 |
|
699 |
if (ret)
|
700 |
return 1; |
701 |
|
702 |
if (qemu_file_has_error(f))
|
703 |
return -EIO;
|
704 |
|
705 |
return 0; |
706 |
} |
707 |
|
708 |
int qemu_savevm_state_complete(QEMUFile *f)
|
709 |
{ |
710 |
SaveStateEntry *se; |
711 |
|
712 |
for (se = first_se; se != NULL; se = se->next) { |
713 |
if (se->save_live_state == NULL) |
714 |
continue;
|
715 |
|
716 |
/* Section type */
|
717 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
718 |
qemu_put_be32(f, se->section_id); |
719 |
|
720 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
721 |
} |
722 |
|
723 |
for(se = first_se; se != NULL; se = se->next) { |
724 |
int len;
|
725 |
|
726 |
if (se->save_state == NULL) |
727 |
continue;
|
728 |
|
729 |
/* Section type */
|
730 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
731 |
qemu_put_be32(f, se->section_id); |
732 |
|
733 |
/* ID string */
|
734 |
len = strlen(se->idstr); |
735 |
qemu_put_byte(f, len); |
736 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
737 |
|
738 |
qemu_put_be32(f, se->instance_id); |
739 |
qemu_put_be32(f, se->version_id); |
740 |
|
741 |
se->save_state(f, se->opaque); |
742 |
} |
743 |
|
744 |
qemu_put_byte(f, QEMU_VM_EOF); |
745 |
|
746 |
if (qemu_file_has_error(f))
|
747 |
return -EIO;
|
748 |
|
749 |
return 0; |
750 |
} |
751 |
|
752 |
int qemu_savevm_state(QEMUFile *f)
|
753 |
{ |
754 |
int saved_vm_running;
|
755 |
int ret;
|
756 |
|
757 |
saved_vm_running = vm_running; |
758 |
vm_stop(0);
|
759 |
|
760 |
bdrv_flush_all(); |
761 |
|
762 |
ret = qemu_savevm_state_begin(f); |
763 |
if (ret < 0) |
764 |
goto out;
|
765 |
|
766 |
do {
|
767 |
ret = qemu_savevm_state_iterate(f); |
768 |
if (ret < 0) |
769 |
goto out;
|
770 |
} while (ret == 0); |
771 |
|
772 |
ret = qemu_savevm_state_complete(f); |
773 |
|
774 |
out:
|
775 |
if (qemu_file_has_error(f))
|
776 |
ret = -EIO; |
777 |
|
778 |
if (!ret && saved_vm_running)
|
779 |
vm_start(); |
780 |
|
781 |
return ret;
|
782 |
} |
783 |
|
784 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
785 |
{ |
786 |
SaveStateEntry *se; |
787 |
|
788 |
for(se = first_se; se != NULL; se = se->next) { |
789 |
if (!strcmp(se->idstr, idstr) &&
|
790 |
instance_id == se->instance_id) |
791 |
return se;
|
792 |
} |
793 |
return NULL; |
794 |
} |
795 |
|
796 |
typedef struct LoadStateEntry { |
797 |
SaveStateEntry *se; |
798 |
int section_id;
|
799 |
int version_id;
|
800 |
struct LoadStateEntry *next;
|
801 |
} LoadStateEntry; |
802 |
|
803 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
804 |
{ |
805 |
SaveStateEntry *se; |
806 |
int len, ret, instance_id, record_len, version_id;
|
807 |
int64_t total_len, end_pos, cur_pos; |
808 |
char idstr[256]; |
809 |
|
810 |
total_len = qemu_get_be64(f); |
811 |
end_pos = total_len + qemu_ftell(f); |
812 |
for(;;) {
|
813 |
if (qemu_ftell(f) >= end_pos)
|
814 |
break;
|
815 |
len = qemu_get_byte(f); |
816 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
817 |
idstr[len] = '\0';
|
818 |
instance_id = qemu_get_be32(f); |
819 |
version_id = qemu_get_be32(f); |
820 |
record_len = qemu_get_be32(f); |
821 |
cur_pos = qemu_ftell(f); |
822 |
se = find_se(idstr, instance_id); |
823 |
if (!se) {
|
824 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
825 |
instance_id, idstr); |
826 |
} else {
|
827 |
ret = se->load_state(f, se->opaque, version_id); |
828 |
if (ret < 0) { |
829 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
830 |
instance_id, idstr); |
831 |
} |
832 |
} |
833 |
/* always seek to exact end of record */
|
834 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
835 |
} |
836 |
|
837 |
if (qemu_file_has_error(f))
|
838 |
return -EIO;
|
839 |
|
840 |
return 0; |
841 |
} |
842 |
|
843 |
int qemu_loadvm_state(QEMUFile *f)
|
844 |
{ |
845 |
LoadStateEntry *first_le = NULL;
|
846 |
uint8_t section_type; |
847 |
unsigned int v; |
848 |
int ret;
|
849 |
|
850 |
v = qemu_get_be32(f); |
851 |
if (v != QEMU_VM_FILE_MAGIC)
|
852 |
return -EINVAL;
|
853 |
|
854 |
v = qemu_get_be32(f); |
855 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
856 |
return qemu_loadvm_state_v2(f);
|
857 |
if (v != QEMU_VM_FILE_VERSION)
|
858 |
return -ENOTSUP;
|
859 |
|
860 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
861 |
uint32_t instance_id, version_id, section_id; |
862 |
LoadStateEntry *le; |
863 |
SaveStateEntry *se; |
864 |
char idstr[257]; |
865 |
int len;
|
866 |
|
867 |
switch (section_type) {
|
868 |
case QEMU_VM_SECTION_START:
|
869 |
case QEMU_VM_SECTION_FULL:
|
870 |
/* Read section start */
|
871 |
section_id = qemu_get_be32(f); |
872 |
len = qemu_get_byte(f); |
873 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
874 |
idstr[len] = 0;
|
875 |
instance_id = qemu_get_be32(f); |
876 |
version_id = qemu_get_be32(f); |
877 |
|
878 |
/* Find savevm section */
|
879 |
se = find_se(idstr, instance_id); |
880 |
if (se == NULL) { |
881 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
882 |
ret = -EINVAL; |
883 |
goto out;
|
884 |
} |
885 |
|
886 |
/* Validate version */
|
887 |
if (version_id > se->version_id) {
|
888 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
889 |
version_id, idstr, se->version_id); |
890 |
ret = -EINVAL; |
891 |
goto out;
|
892 |
} |
893 |
|
894 |
/* Add entry */
|
895 |
le = qemu_mallocz(sizeof(*le));
|
896 |
|
897 |
le->se = se; |
898 |
le->section_id = section_id; |
899 |
le->version_id = version_id; |
900 |
le->next = first_le; |
901 |
first_le = le; |
902 |
|
903 |
le->se->load_state(f, le->se->opaque, le->version_id); |
904 |
break;
|
905 |
case QEMU_VM_SECTION_PART:
|
906 |
case QEMU_VM_SECTION_END:
|
907 |
section_id = qemu_get_be32(f); |
908 |
|
909 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
910 |
if (le == NULL) { |
911 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
912 |
ret = -EINVAL; |
913 |
goto out;
|
914 |
} |
915 |
|
916 |
le->se->load_state(f, le->se->opaque, le->version_id); |
917 |
break;
|
918 |
default:
|
919 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
920 |
ret = -EINVAL; |
921 |
goto out;
|
922 |
} |
923 |
} |
924 |
|
925 |
ret = 0;
|
926 |
|
927 |
out:
|
928 |
while (first_le) {
|
929 |
LoadStateEntry *le = first_le; |
930 |
first_le = first_le->next; |
931 |
qemu_free(le); |
932 |
} |
933 |
|
934 |
if (qemu_file_has_error(f))
|
935 |
ret = -EIO; |
936 |
|
937 |
return ret;
|
938 |
} |
939 |
|
940 |
/* device can contain snapshots */
|
941 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
942 |
{ |
943 |
return (bs &&
|
944 |
!bdrv_is_removable(bs) && |
945 |
!bdrv_is_read_only(bs)); |
946 |
} |
947 |
|
948 |
/* device must be snapshots in order to have a reliable snapshot */
|
949 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
950 |
{ |
951 |
return (bs &&
|
952 |
!bdrv_is_removable(bs) && |
953 |
!bdrv_is_read_only(bs)); |
954 |
} |
955 |
|
956 |
static BlockDriverState *get_bs_snapshots(void) |
957 |
{ |
958 |
BlockDriverState *bs; |
959 |
int i;
|
960 |
|
961 |
if (bs_snapshots)
|
962 |
return bs_snapshots;
|
963 |
for(i = 0; i <= nb_drives; i++) { |
964 |
bs = drives_table[i].bdrv; |
965 |
if (bdrv_can_snapshot(bs))
|
966 |
goto ok;
|
967 |
} |
968 |
return NULL; |
969 |
ok:
|
970 |
bs_snapshots = bs; |
971 |
return bs;
|
972 |
} |
973 |
|
974 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
975 |
const char *name) |
976 |
{ |
977 |
QEMUSnapshotInfo *sn_tab, *sn; |
978 |
int nb_sns, i, ret;
|
979 |
|
980 |
ret = -ENOENT; |
981 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
982 |
if (nb_sns < 0) |
983 |
return ret;
|
984 |
for(i = 0; i < nb_sns; i++) { |
985 |
sn = &sn_tab[i]; |
986 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
987 |
*sn_info = *sn; |
988 |
ret = 0;
|
989 |
break;
|
990 |
} |
991 |
} |
992 |
qemu_free(sn_tab); |
993 |
return ret;
|
994 |
} |
995 |
|
996 |
void do_savevm(const char *name) |
997 |
{ |
998 |
BlockDriverState *bs, *bs1; |
999 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1000 |
int must_delete, ret, i;
|
1001 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1002 |
QEMUFile *f; |
1003 |
int saved_vm_running;
|
1004 |
uint32_t vm_state_size; |
1005 |
#ifdef _WIN32
|
1006 |
struct _timeb tb;
|
1007 |
#else
|
1008 |
struct timeval tv;
|
1009 |
#endif
|
1010 |
|
1011 |
bs = get_bs_snapshots(); |
1012 |
if (!bs) {
|
1013 |
term_printf("No block device can accept snapshots\n");
|
1014 |
return;
|
1015 |
} |
1016 |
|
1017 |
/* ??? Should this occur after vm_stop? */
|
1018 |
qemu_aio_flush(); |
1019 |
|
1020 |
saved_vm_running = vm_running; |
1021 |
vm_stop(0);
|
1022 |
|
1023 |
must_delete = 0;
|
1024 |
if (name) {
|
1025 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1026 |
if (ret >= 0) { |
1027 |
must_delete = 1;
|
1028 |
} |
1029 |
} |
1030 |
memset(sn, 0, sizeof(*sn)); |
1031 |
if (must_delete) {
|
1032 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1033 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1034 |
} else {
|
1035 |
if (name)
|
1036 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1037 |
} |
1038 |
|
1039 |
/* fill auxiliary fields */
|
1040 |
#ifdef _WIN32
|
1041 |
_ftime(&tb); |
1042 |
sn->date_sec = tb.time; |
1043 |
sn->date_nsec = tb.millitm * 1000000;
|
1044 |
#else
|
1045 |
gettimeofday(&tv, NULL);
|
1046 |
sn->date_sec = tv.tv_sec; |
1047 |
sn->date_nsec = tv.tv_usec * 1000;
|
1048 |
#endif
|
1049 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1050 |
|
1051 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1052 |
term_printf("Device %s does not support VM state snapshots\n",
|
1053 |
bdrv_get_device_name(bs)); |
1054 |
goto the_end;
|
1055 |
} |
1056 |
|
1057 |
/* save the VM state */
|
1058 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
1059 |
if (!f) {
|
1060 |
term_printf("Could not open VM state file\n");
|
1061 |
goto the_end;
|
1062 |
} |
1063 |
ret = qemu_savevm_state(f); |
1064 |
vm_state_size = qemu_ftell(f); |
1065 |
qemu_fclose(f); |
1066 |
if (ret < 0) { |
1067 |
term_printf("Error %d while writing VM\n", ret);
|
1068 |
goto the_end;
|
1069 |
} |
1070 |
|
1071 |
/* create the snapshots */
|
1072 |
|
1073 |
for(i = 0; i < nb_drives; i++) { |
1074 |
bs1 = drives_table[i].bdrv; |
1075 |
if (bdrv_has_snapshot(bs1)) {
|
1076 |
if (must_delete) {
|
1077 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1078 |
if (ret < 0) { |
1079 |
term_printf("Error while deleting snapshot on '%s'\n",
|
1080 |
bdrv_get_device_name(bs1)); |
1081 |
} |
1082 |
} |
1083 |
/* Write VM state size only to the image that contains the state */
|
1084 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1085 |
ret = bdrv_snapshot_create(bs1, sn); |
1086 |
if (ret < 0) { |
1087 |
term_printf("Error while creating snapshot on '%s'\n",
|
1088 |
bdrv_get_device_name(bs1)); |
1089 |
} |
1090 |
} |
1091 |
} |
1092 |
|
1093 |
the_end:
|
1094 |
if (saved_vm_running)
|
1095 |
vm_start(); |
1096 |
} |
1097 |
|
1098 |
void do_loadvm(const char *name) |
1099 |
{ |
1100 |
BlockDriverState *bs, *bs1; |
1101 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1102 |
QEMUSnapshotInfo sn; |
1103 |
QEMUFile *f; |
1104 |
int i, ret;
|
1105 |
int saved_vm_running;
|
1106 |
|
1107 |
bs = get_bs_snapshots(); |
1108 |
if (!bs) {
|
1109 |
term_printf("No block device supports snapshots\n");
|
1110 |
return;
|
1111 |
} |
1112 |
|
1113 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1114 |
qemu_aio_flush(); |
1115 |
|
1116 |
saved_vm_running = vm_running; |
1117 |
vm_stop(0);
|
1118 |
|
1119 |
for(i = 0; i <= nb_drives; i++) { |
1120 |
bs1 = drives_table[i].bdrv; |
1121 |
if (bdrv_has_snapshot(bs1)) {
|
1122 |
ret = bdrv_snapshot_goto(bs1, name); |
1123 |
if (ret < 0) { |
1124 |
if (bs != bs1)
|
1125 |
term_printf("Warning: ");
|
1126 |
switch(ret) {
|
1127 |
case -ENOTSUP:
|
1128 |
term_printf("Snapshots not supported on device '%s'\n",
|
1129 |
bdrv_get_device_name(bs1)); |
1130 |
break;
|
1131 |
case -ENOENT:
|
1132 |
term_printf("Could not find snapshot '%s' on device '%s'\n",
|
1133 |
name, bdrv_get_device_name(bs1)); |
1134 |
break;
|
1135 |
default:
|
1136 |
term_printf("Error %d while activating snapshot on '%s'\n",
|
1137 |
ret, bdrv_get_device_name(bs1)); |
1138 |
break;
|
1139 |
} |
1140 |
/* fatal on snapshot block device */
|
1141 |
if (bs == bs1)
|
1142 |
goto the_end;
|
1143 |
} |
1144 |
} |
1145 |
} |
1146 |
|
1147 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1148 |
term_printf("Device %s does not support VM state snapshots\n",
|
1149 |
bdrv_get_device_name(bs)); |
1150 |
return;
|
1151 |
} |
1152 |
|
1153 |
/* Don't even try to load empty VM states */
|
1154 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1155 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1156 |
goto the_end;
|
1157 |
|
1158 |
/* restore the VM state */
|
1159 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
1160 |
if (!f) {
|
1161 |
term_printf("Could not open VM state file\n");
|
1162 |
goto the_end;
|
1163 |
} |
1164 |
ret = qemu_loadvm_state(f); |
1165 |
qemu_fclose(f); |
1166 |
if (ret < 0) { |
1167 |
term_printf("Error %d while loading VM state\n", ret);
|
1168 |
} |
1169 |
the_end:
|
1170 |
if (saved_vm_running)
|
1171 |
vm_start(); |
1172 |
} |
1173 |
|
1174 |
void do_delvm(const char *name) |
1175 |
{ |
1176 |
BlockDriverState *bs, *bs1; |
1177 |
int i, ret;
|
1178 |
|
1179 |
bs = get_bs_snapshots(); |
1180 |
if (!bs) {
|
1181 |
term_printf("No block device supports snapshots\n");
|
1182 |
return;
|
1183 |
} |
1184 |
|
1185 |
for(i = 0; i <= nb_drives; i++) { |
1186 |
bs1 = drives_table[i].bdrv; |
1187 |
if (bdrv_has_snapshot(bs1)) {
|
1188 |
ret = bdrv_snapshot_delete(bs1, name); |
1189 |
if (ret < 0) { |
1190 |
if (ret == -ENOTSUP)
|
1191 |
term_printf("Snapshots not supported on device '%s'\n",
|
1192 |
bdrv_get_device_name(bs1)); |
1193 |
else
|
1194 |
term_printf("Error %d while deleting snapshot on '%s'\n",
|
1195 |
ret, bdrv_get_device_name(bs1)); |
1196 |
} |
1197 |
} |
1198 |
} |
1199 |
} |
1200 |
|
1201 |
void do_info_snapshots(void) |
1202 |
{ |
1203 |
BlockDriverState *bs, *bs1; |
1204 |
QEMUSnapshotInfo *sn_tab, *sn; |
1205 |
int nb_sns, i;
|
1206 |
char buf[256]; |
1207 |
|
1208 |
bs = get_bs_snapshots(); |
1209 |
if (!bs) {
|
1210 |
term_printf("No available block device supports snapshots\n");
|
1211 |
return;
|
1212 |
} |
1213 |
term_printf("Snapshot devices:");
|
1214 |
for(i = 0; i <= nb_drives; i++) { |
1215 |
bs1 = drives_table[i].bdrv; |
1216 |
if (bdrv_has_snapshot(bs1)) {
|
1217 |
if (bs == bs1)
|
1218 |
term_printf(" %s", bdrv_get_device_name(bs1));
|
1219 |
} |
1220 |
} |
1221 |
term_printf("\n");
|
1222 |
|
1223 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1224 |
if (nb_sns < 0) { |
1225 |
term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
|
1226 |
return;
|
1227 |
} |
1228 |
term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
|
1229 |
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1230 |
for(i = 0; i < nb_sns; i++) { |
1231 |
sn = &sn_tab[i]; |
1232 |
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1233 |
} |
1234 |
qemu_free(sn_tab); |
1235 |
} |