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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" |
25 |
#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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|
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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> |
43 |
|
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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> |
50 |
#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> |
64 |
#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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|
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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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|
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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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|
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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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return 18; /* len */ |
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} |
113 |
|
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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 < 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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} |
128 |
} |
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} |
130 |
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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; |
138 |
QEMUFileGetBufferFunc *get_buffer; |
139 |
QEMUFileCloseFunc *close; |
140 |
QEMUFileRateLimit *rate_limit; |
141 |
void *opaque;
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int is_write;
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143 |
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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 */ |
148 |
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 |
154 |
{ |
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FILE *popen_file; |
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QEMUFile *file; |
157 |
} QEMUFilePopen; |
158 |
|
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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; |
164 |
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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; |
169 |
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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(); |
176 |
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return len;
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} |
179 |
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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; |
185 |
} |
186 |
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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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} |
192 |
|
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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); |
197 |
} |
198 |
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static int popen_close(void *opaque) |
200 |
{ |
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QEMUFilePopen *s = opaque; |
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pclose(s->popen_file); |
203 |
qemu_free(s); |
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return 0; |
205 |
} |
206 |
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QEMUFile *qemu_popen(FILE *popen_file, const char *mode) |
208 |
{ |
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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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} |
215 |
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s = qemu_mallocz(sizeof(QEMUFilePopen));
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if (!s) {
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fprintf(stderr, "qemu_popen: malloc failed\n");
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return NULL; |
220 |
} |
221 |
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s->popen_file = popen_file; |
223 |
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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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} |
232 |
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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); |
238 |
if(popen_file == NULL) { |
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return NULL; |
240 |
} |
241 |
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return qemu_popen(popen_file, mode);
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} |
244 |
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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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if (s == NULL) |
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return NULL; |
251 |
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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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} |
256 |
|
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typedef struct QEMUFileStdio |
258 |
{ |
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FILE *outfile; |
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} QEMUFileStdio; |
261 |
|
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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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} |
270 |
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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); |
276 |
} |
277 |
|
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static int file_close(void *opaque) |
279 |
{ |
280 |
QEMUFileStdio *s = opaque; |
281 |
fclose(s->outfile); |
282 |
qemu_free(s); |
283 |
return 0; |
284 |
} |
285 |
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QEMUFile *qemu_fopen(const char *filename, const char *mode) |
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{ |
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QEMUFileStdio *s; |
289 |
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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if (!s)
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return NULL; |
293 |
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s->outfile = fopen(filename, mode); |
295 |
if (!s->outfile)
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goto fail;
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297 |
|
298 |
if (!strcmp(mode, "wb")) |
299 |
return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL); |
300 |
else if (!strcmp(mode, "rb")) |
301 |
return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL); |
302 |
|
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fail:
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304 |
if (s->outfile)
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fclose(s->outfile); |
306 |
qemu_free(s); |
307 |
return NULL; |
308 |
} |
309 |
|
310 |
typedef struct QEMUFileBdrv |
311 |
{ |
312 |
BlockDriverState *bs; |
313 |
int64_t base_offset; |
314 |
} QEMUFileBdrv; |
315 |
|
316 |
static int bdrv_put_buffer(void *opaque, const uint8_t *buf, |
317 |
int64_t pos, int size)
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318 |
{ |
319 |
QEMUFileBdrv *s = opaque; |
320 |
bdrv_pwrite(s->bs, s->base_offset + pos, buf, size); |
321 |
return size;
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322 |
} |
323 |
|
324 |
static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
325 |
{ |
326 |
QEMUFileBdrv *s = opaque; |
327 |
return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
|
328 |
} |
329 |
|
330 |
static int bdrv_fclose(void *opaque) |
331 |
{ |
332 |
QEMUFileBdrv *s = opaque; |
333 |
qemu_free(s); |
334 |
return 0; |
335 |
} |
336 |
|
337 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable) |
338 |
{ |
339 |
QEMUFileBdrv *s; |
340 |
|
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s = qemu_mallocz(sizeof(QEMUFileBdrv));
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342 |
if (!s)
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return NULL; |
344 |
|
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s->bs = bs; |
346 |
s->base_offset = offset; |
347 |
|
348 |
if (is_writable)
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return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL); |
350 |
|
351 |
return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL); |
352 |
} |
353 |
|
354 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
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355 |
QEMUFileGetBufferFunc *get_buffer, |
356 |
QEMUFileCloseFunc *close, |
357 |
QEMUFileRateLimit *rate_limit) |
358 |
{ |
359 |
QEMUFile *f; |
360 |
|
361 |
f = qemu_mallocz(sizeof(QEMUFile));
|
362 |
if (!f)
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363 |
return NULL; |
364 |
|
365 |
f->opaque = opaque; |
366 |
f->put_buffer = put_buffer; |
367 |
f->get_buffer = get_buffer; |
368 |
f->close = close; |
369 |
f->rate_limit = rate_limit; |
370 |
f->is_write = 0;
|
371 |
|
372 |
return f;
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373 |
} |
374 |
|
375 |
int qemu_file_has_error(QEMUFile *f)
|
376 |
{ |
377 |
return f->has_error;
|
378 |
} |
379 |
|
380 |
void qemu_fflush(QEMUFile *f)
|
381 |
{ |
382 |
if (!f->put_buffer)
|
383 |
return;
|
384 |
|
385 |
if (f->is_write && f->buf_index > 0) { |
386 |
int len;
|
387 |
|
388 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
389 |
if (len > 0) |
390 |
f->buf_offset += f->buf_index; |
391 |
else
|
392 |
f->has_error = 1;
|
393 |
f->buf_index = 0;
|
394 |
} |
395 |
} |
396 |
|
397 |
static void qemu_fill_buffer(QEMUFile *f) |
398 |
{ |
399 |
int len;
|
400 |
|
401 |
if (!f->get_buffer)
|
402 |
return;
|
403 |
|
404 |
if (f->is_write)
|
405 |
abort(); |
406 |
|
407 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
408 |
if (len > 0) { |
409 |
f->buf_index = 0;
|
410 |
f->buf_size = len; |
411 |
f->buf_offset += len; |
412 |
} else if (len != -EAGAIN) |
413 |
f->has_error = 1;
|
414 |
} |
415 |
|
416 |
int qemu_fclose(QEMUFile *f)
|
417 |
{ |
418 |
int ret = 0; |
419 |
qemu_fflush(f); |
420 |
if (f->close)
|
421 |
ret = f->close(f->opaque); |
422 |
qemu_free(f); |
423 |
return ret;
|
424 |
} |
425 |
|
426 |
void qemu_file_put_notify(QEMUFile *f)
|
427 |
{ |
428 |
f->put_buffer(f->opaque, NULL, 0, 0); |
429 |
} |
430 |
|
431 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
432 |
{ |
433 |
int l;
|
434 |
|
435 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
436 |
fprintf(stderr, |
437 |
"Attempted to write to buffer while read buffer is not empty\n");
|
438 |
abort(); |
439 |
} |
440 |
|
441 |
while (!f->has_error && size > 0) { |
442 |
l = IO_BUF_SIZE - f->buf_index; |
443 |
if (l > size)
|
444 |
l = size; |
445 |
memcpy(f->buf + f->buf_index, buf, l); |
446 |
f->is_write = 1;
|
447 |
f->buf_index += l; |
448 |
buf += l; |
449 |
size -= l; |
450 |
if (f->buf_index >= IO_BUF_SIZE)
|
451 |
qemu_fflush(f); |
452 |
} |
453 |
} |
454 |
|
455 |
void qemu_put_byte(QEMUFile *f, int v) |
456 |
{ |
457 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
458 |
fprintf(stderr, |
459 |
"Attempted to write to buffer while read buffer is not empty\n");
|
460 |
abort(); |
461 |
} |
462 |
|
463 |
f->buf[f->buf_index++] = v; |
464 |
f->is_write = 1;
|
465 |
if (f->buf_index >= IO_BUF_SIZE)
|
466 |
qemu_fflush(f); |
467 |
} |
468 |
|
469 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
470 |
{ |
471 |
int size, l;
|
472 |
|
473 |
if (f->is_write)
|
474 |
abort(); |
475 |
|
476 |
size = size1; |
477 |
while (size > 0) { |
478 |
l = f->buf_size - f->buf_index; |
479 |
if (l == 0) { |
480 |
qemu_fill_buffer(f); |
481 |
l = f->buf_size - f->buf_index; |
482 |
if (l == 0) |
483 |
break;
|
484 |
} |
485 |
if (l > size)
|
486 |
l = size; |
487 |
memcpy(buf, f->buf + f->buf_index, l); |
488 |
f->buf_index += l; |
489 |
buf += l; |
490 |
size -= l; |
491 |
} |
492 |
return size1 - size;
|
493 |
} |
494 |
|
495 |
int qemu_get_byte(QEMUFile *f)
|
496 |
{ |
497 |
if (f->is_write)
|
498 |
abort(); |
499 |
|
500 |
if (f->buf_index >= f->buf_size) {
|
501 |
qemu_fill_buffer(f); |
502 |
if (f->buf_index >= f->buf_size)
|
503 |
return 0; |
504 |
} |
505 |
return f->buf[f->buf_index++];
|
506 |
} |
507 |
|
508 |
int64_t qemu_ftell(QEMUFile *f) |
509 |
{ |
510 |
return f->buf_offset - f->buf_size + f->buf_index;
|
511 |
} |
512 |
|
513 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
514 |
{ |
515 |
if (whence == SEEK_SET) {
|
516 |
/* nothing to do */
|
517 |
} else if (whence == SEEK_CUR) { |
518 |
pos += qemu_ftell(f); |
519 |
} else {
|
520 |
/* SEEK_END not supported */
|
521 |
return -1; |
522 |
} |
523 |
if (f->put_buffer) {
|
524 |
qemu_fflush(f); |
525 |
f->buf_offset = pos; |
526 |
} else {
|
527 |
f->buf_offset = pos; |
528 |
f->buf_index = 0;
|
529 |
f->buf_size = 0;
|
530 |
} |
531 |
return pos;
|
532 |
} |
533 |
|
534 |
int qemu_file_rate_limit(QEMUFile *f)
|
535 |
{ |
536 |
if (f->rate_limit)
|
537 |
return f->rate_limit(f->opaque);
|
538 |
|
539 |
return 0; |
540 |
} |
541 |
|
542 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
543 |
{ |
544 |
qemu_put_byte(f, v >> 8);
|
545 |
qemu_put_byte(f, v); |
546 |
} |
547 |
|
548 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
549 |
{ |
550 |
qemu_put_byte(f, v >> 24);
|
551 |
qemu_put_byte(f, v >> 16);
|
552 |
qemu_put_byte(f, v >> 8);
|
553 |
qemu_put_byte(f, v); |
554 |
} |
555 |
|
556 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
557 |
{ |
558 |
qemu_put_be32(f, v >> 32);
|
559 |
qemu_put_be32(f, v); |
560 |
} |
561 |
|
562 |
unsigned int qemu_get_be16(QEMUFile *f) |
563 |
{ |
564 |
unsigned int v; |
565 |
v = qemu_get_byte(f) << 8;
|
566 |
v |= qemu_get_byte(f); |
567 |
return v;
|
568 |
} |
569 |
|
570 |
unsigned int qemu_get_be32(QEMUFile *f) |
571 |
{ |
572 |
unsigned int v; |
573 |
v = qemu_get_byte(f) << 24;
|
574 |
v |= qemu_get_byte(f) << 16;
|
575 |
v |= qemu_get_byte(f) << 8;
|
576 |
v |= qemu_get_byte(f); |
577 |
return v;
|
578 |
} |
579 |
|
580 |
uint64_t qemu_get_be64(QEMUFile *f) |
581 |
{ |
582 |
uint64_t v; |
583 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
584 |
v |= qemu_get_be32(f); |
585 |
return v;
|
586 |
} |
587 |
|
588 |
typedef struct SaveStateEntry { |
589 |
char idstr[256]; |
590 |
int instance_id;
|
591 |
int version_id;
|
592 |
int section_id;
|
593 |
SaveLiveStateHandler *save_live_state; |
594 |
SaveStateHandler *save_state; |
595 |
LoadStateHandler *load_state; |
596 |
void *opaque;
|
597 |
struct SaveStateEntry *next;
|
598 |
} SaveStateEntry; |
599 |
|
600 |
static SaveStateEntry *first_se;
|
601 |
|
602 |
/* TODO: Individual devices generally have very little idea about the rest
|
603 |
of the system, so instance_id should be removed/replaced.
|
604 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
605 |
distinguishing id for all instances of your device class. */
|
606 |
int register_savevm_live(const char *idstr, |
607 |
int instance_id,
|
608 |
int version_id,
|
609 |
SaveLiveStateHandler *save_live_state, |
610 |
SaveStateHandler *save_state, |
611 |
LoadStateHandler *load_state, |
612 |
void *opaque)
|
613 |
{ |
614 |
SaveStateEntry *se, **pse; |
615 |
static int global_section_id; |
616 |
|
617 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
618 |
if (!se)
|
619 |
return -1; |
620 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
621 |
se->instance_id = (instance_id == -1) ? 0 : instance_id; |
622 |
se->version_id = version_id; |
623 |
se->section_id = global_section_id++; |
624 |
se->save_live_state = save_live_state; |
625 |
se->save_state = save_state; |
626 |
se->load_state = load_state; |
627 |
se->opaque = opaque; |
628 |
se->next = NULL;
|
629 |
|
630 |
/* add at the end of list */
|
631 |
pse = &first_se; |
632 |
while (*pse != NULL) { |
633 |
if (instance_id == -1 |
634 |
&& strcmp(se->idstr, (*pse)->idstr) == 0
|
635 |
&& se->instance_id <= (*pse)->instance_id) |
636 |
se->instance_id = (*pse)->instance_id + 1;
|
637 |
pse = &(*pse)->next; |
638 |
} |
639 |
*pse = se; |
640 |
return 0; |
641 |
} |
642 |
|
643 |
int register_savevm(const char *idstr, |
644 |
int instance_id,
|
645 |
int version_id,
|
646 |
SaveStateHandler *save_state, |
647 |
LoadStateHandler *load_state, |
648 |
void *opaque)
|
649 |
{ |
650 |
return register_savevm_live(idstr, instance_id, version_id,
|
651 |
NULL, save_state, load_state, opaque);
|
652 |
} |
653 |
|
654 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
655 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
656 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
657 |
|
658 |
#define QEMU_VM_EOF 0x00 |
659 |
#define QEMU_VM_SECTION_START 0x01 |
660 |
#define QEMU_VM_SECTION_PART 0x02 |
661 |
#define QEMU_VM_SECTION_END 0x03 |
662 |
#define QEMU_VM_SECTION_FULL 0x04 |
663 |
|
664 |
int qemu_savevm_state_begin(QEMUFile *f)
|
665 |
{ |
666 |
SaveStateEntry *se; |
667 |
|
668 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
669 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
670 |
|
671 |
for (se = first_se; se != NULL; se = se->next) { |
672 |
int len;
|
673 |
|
674 |
if (se->save_live_state == NULL) |
675 |
continue;
|
676 |
|
677 |
/* Section type */
|
678 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
679 |
qemu_put_be32(f, se->section_id); |
680 |
|
681 |
/* ID string */
|
682 |
len = strlen(se->idstr); |
683 |
qemu_put_byte(f, len); |
684 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
685 |
|
686 |
qemu_put_be32(f, se->instance_id); |
687 |
qemu_put_be32(f, se->version_id); |
688 |
|
689 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
690 |
} |
691 |
|
692 |
if (qemu_file_has_error(f))
|
693 |
return -EIO;
|
694 |
|
695 |
return 0; |
696 |
} |
697 |
|
698 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
699 |
{ |
700 |
SaveStateEntry *se; |
701 |
int ret = 1; |
702 |
|
703 |
for (se = first_se; se != NULL; se = se->next) { |
704 |
if (se->save_live_state == NULL) |
705 |
continue;
|
706 |
|
707 |
/* Section type */
|
708 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
709 |
qemu_put_be32(f, se->section_id); |
710 |
|
711 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
712 |
} |
713 |
|
714 |
if (ret)
|
715 |
return 1; |
716 |
|
717 |
if (qemu_file_has_error(f))
|
718 |
return -EIO;
|
719 |
|
720 |
return 0; |
721 |
} |
722 |
|
723 |
int qemu_savevm_state_complete(QEMUFile *f)
|
724 |
{ |
725 |
SaveStateEntry *se; |
726 |
|
727 |
for (se = first_se; se != NULL; se = se->next) { |
728 |
if (se->save_live_state == NULL) |
729 |
continue;
|
730 |
|
731 |
/* Section type */
|
732 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
733 |
qemu_put_be32(f, se->section_id); |
734 |
|
735 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
736 |
} |
737 |
|
738 |
for(se = first_se; se != NULL; se = se->next) { |
739 |
int len;
|
740 |
|
741 |
if (se->save_state == NULL) |
742 |
continue;
|
743 |
|
744 |
/* Section type */
|
745 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
746 |
qemu_put_be32(f, se->section_id); |
747 |
|
748 |
/* ID string */
|
749 |
len = strlen(se->idstr); |
750 |
qemu_put_byte(f, len); |
751 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
752 |
|
753 |
qemu_put_be32(f, se->instance_id); |
754 |
qemu_put_be32(f, se->version_id); |
755 |
|
756 |
se->save_state(f, se->opaque); |
757 |
} |
758 |
|
759 |
qemu_put_byte(f, QEMU_VM_EOF); |
760 |
|
761 |
if (qemu_file_has_error(f))
|
762 |
return -EIO;
|
763 |
|
764 |
return 0; |
765 |
} |
766 |
|
767 |
int qemu_savevm_state(QEMUFile *f)
|
768 |
{ |
769 |
int saved_vm_running;
|
770 |
int ret;
|
771 |
|
772 |
saved_vm_running = vm_running; |
773 |
vm_stop(0);
|
774 |
|
775 |
bdrv_flush_all(); |
776 |
|
777 |
ret = qemu_savevm_state_begin(f); |
778 |
if (ret < 0) |
779 |
goto out;
|
780 |
|
781 |
do {
|
782 |
ret = qemu_savevm_state_iterate(f); |
783 |
if (ret < 0) |
784 |
goto out;
|
785 |
} while (ret == 0); |
786 |
|
787 |
ret = qemu_savevm_state_complete(f); |
788 |
|
789 |
out:
|
790 |
if (qemu_file_has_error(f))
|
791 |
ret = -EIO; |
792 |
|
793 |
if (!ret && saved_vm_running)
|
794 |
vm_start(); |
795 |
|
796 |
return ret;
|
797 |
} |
798 |
|
799 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
800 |
{ |
801 |
SaveStateEntry *se; |
802 |
|
803 |
for(se = first_se; se != NULL; se = se->next) { |
804 |
if (!strcmp(se->idstr, idstr) &&
|
805 |
instance_id == se->instance_id) |
806 |
return se;
|
807 |
} |
808 |
return NULL; |
809 |
} |
810 |
|
811 |
typedef struct LoadStateEntry { |
812 |
SaveStateEntry *se; |
813 |
int section_id;
|
814 |
int version_id;
|
815 |
struct LoadStateEntry *next;
|
816 |
} LoadStateEntry; |
817 |
|
818 |
static int qemu_loadvm_state_v2(QEMUFile *f) |
819 |
{ |
820 |
SaveStateEntry *se; |
821 |
int len, ret, instance_id, record_len, version_id;
|
822 |
int64_t total_len, end_pos, cur_pos; |
823 |
char idstr[256]; |
824 |
|
825 |
total_len = qemu_get_be64(f); |
826 |
end_pos = total_len + qemu_ftell(f); |
827 |
for(;;) {
|
828 |
if (qemu_ftell(f) >= end_pos)
|
829 |
break;
|
830 |
len = qemu_get_byte(f); |
831 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
832 |
idstr[len] = '\0';
|
833 |
instance_id = qemu_get_be32(f); |
834 |
version_id = qemu_get_be32(f); |
835 |
record_len = qemu_get_be32(f); |
836 |
cur_pos = qemu_ftell(f); |
837 |
se = find_se(idstr, instance_id); |
838 |
if (!se) {
|
839 |
fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
|
840 |
instance_id, idstr); |
841 |
} else {
|
842 |
ret = se->load_state(f, se->opaque, version_id); |
843 |
if (ret < 0) { |
844 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
845 |
instance_id, idstr); |
846 |
} |
847 |
} |
848 |
/* always seek to exact end of record */
|
849 |
qemu_fseek(f, cur_pos + record_len, SEEK_SET); |
850 |
} |
851 |
|
852 |
if (qemu_file_has_error(f))
|
853 |
return -EIO;
|
854 |
|
855 |
return 0; |
856 |
} |
857 |
|
858 |
int qemu_loadvm_state(QEMUFile *f)
|
859 |
{ |
860 |
LoadStateEntry *first_le = NULL;
|
861 |
uint8_t section_type; |
862 |
unsigned int v; |
863 |
int ret;
|
864 |
|
865 |
v = qemu_get_be32(f); |
866 |
if (v != QEMU_VM_FILE_MAGIC)
|
867 |
return -EINVAL;
|
868 |
|
869 |
v = qemu_get_be32(f); |
870 |
if (v == QEMU_VM_FILE_VERSION_COMPAT)
|
871 |
return qemu_loadvm_state_v2(f);
|
872 |
if (v != QEMU_VM_FILE_VERSION)
|
873 |
return -ENOTSUP;
|
874 |
|
875 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
876 |
uint32_t instance_id, version_id, section_id; |
877 |
LoadStateEntry *le; |
878 |
SaveStateEntry *se; |
879 |
char idstr[257]; |
880 |
int len;
|
881 |
|
882 |
switch (section_type) {
|
883 |
case QEMU_VM_SECTION_START:
|
884 |
case QEMU_VM_SECTION_FULL:
|
885 |
/* Read section start */
|
886 |
section_id = qemu_get_be32(f); |
887 |
len = qemu_get_byte(f); |
888 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
889 |
idstr[len] = 0;
|
890 |
instance_id = qemu_get_be32(f); |
891 |
version_id = qemu_get_be32(f); |
892 |
|
893 |
/* Find savevm section */
|
894 |
se = find_se(idstr, instance_id); |
895 |
if (se == NULL) { |
896 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
897 |
ret = -EINVAL; |
898 |
goto out;
|
899 |
} |
900 |
|
901 |
/* Validate version */
|
902 |
if (version_id > se->version_id) {
|
903 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
904 |
version_id, idstr, se->version_id); |
905 |
ret = -EINVAL; |
906 |
goto out;
|
907 |
} |
908 |
|
909 |
/* Add entry */
|
910 |
le = qemu_mallocz(sizeof(*le));
|
911 |
if (le == NULL) { |
912 |
ret = -ENOMEM; |
913 |
goto out;
|
914 |
} |
915 |
|
916 |
le->se = se; |
917 |
le->section_id = section_id; |
918 |
le->version_id = version_id; |
919 |
le->next = first_le; |
920 |
first_le = le; |
921 |
|
922 |
le->se->load_state(f, le->se->opaque, le->version_id); |
923 |
break;
|
924 |
case QEMU_VM_SECTION_PART:
|
925 |
case QEMU_VM_SECTION_END:
|
926 |
section_id = qemu_get_be32(f); |
927 |
|
928 |
for (le = first_le; le && le->section_id != section_id; le = le->next);
|
929 |
if (le == NULL) { |
930 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
931 |
ret = -EINVAL; |
932 |
goto out;
|
933 |
} |
934 |
|
935 |
le->se->load_state(f, le->se->opaque, le->version_id); |
936 |
break;
|
937 |
default:
|
938 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
939 |
ret = -EINVAL; |
940 |
goto out;
|
941 |
} |
942 |
} |
943 |
|
944 |
ret = 0;
|
945 |
|
946 |
out:
|
947 |
while (first_le) {
|
948 |
LoadStateEntry *le = first_le; |
949 |
first_le = first_le->next; |
950 |
qemu_free(le); |
951 |
} |
952 |
|
953 |
if (qemu_file_has_error(f))
|
954 |
ret = -EIO; |
955 |
|
956 |
return ret;
|
957 |
} |
958 |
|
959 |
/* device can contain snapshots */
|
960 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
961 |
{ |
962 |
return (bs &&
|
963 |
!bdrv_is_removable(bs) && |
964 |
!bdrv_is_read_only(bs)); |
965 |
} |
966 |
|
967 |
/* device must be snapshots in order to have a reliable snapshot */
|
968 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
969 |
{ |
970 |
return (bs &&
|
971 |
!bdrv_is_removable(bs) && |
972 |
!bdrv_is_read_only(bs)); |
973 |
} |
974 |
|
975 |
static BlockDriverState *get_bs_snapshots(void) |
976 |
{ |
977 |
BlockDriverState *bs; |
978 |
int i;
|
979 |
|
980 |
if (bs_snapshots)
|
981 |
return bs_snapshots;
|
982 |
for(i = 0; i <= nb_drives; i++) { |
983 |
bs = drives_table[i].bdrv; |
984 |
if (bdrv_can_snapshot(bs))
|
985 |
goto ok;
|
986 |
} |
987 |
return NULL; |
988 |
ok:
|
989 |
bs_snapshots = bs; |
990 |
return bs;
|
991 |
} |
992 |
|
993 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
994 |
const char *name) |
995 |
{ |
996 |
QEMUSnapshotInfo *sn_tab, *sn; |
997 |
int nb_sns, i, ret;
|
998 |
|
999 |
ret = -ENOENT; |
1000 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1001 |
if (nb_sns < 0) |
1002 |
return ret;
|
1003 |
for(i = 0; i < nb_sns; i++) { |
1004 |
sn = &sn_tab[i]; |
1005 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1006 |
*sn_info = *sn; |
1007 |
ret = 0;
|
1008 |
break;
|
1009 |
} |
1010 |
} |
1011 |
qemu_free(sn_tab); |
1012 |
return ret;
|
1013 |
} |
1014 |
|
1015 |
void do_savevm(const char *name) |
1016 |
{ |
1017 |
BlockDriverState *bs, *bs1; |
1018 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1019 |
int must_delete, ret, i;
|
1020 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1021 |
QEMUFile *f; |
1022 |
int saved_vm_running;
|
1023 |
uint32_t vm_state_size; |
1024 |
#ifdef _WIN32
|
1025 |
struct _timeb tb;
|
1026 |
#else
|
1027 |
struct timeval tv;
|
1028 |
#endif
|
1029 |
|
1030 |
bs = get_bs_snapshots(); |
1031 |
if (!bs) {
|
1032 |
term_printf("No block device can accept snapshots\n");
|
1033 |
return;
|
1034 |
} |
1035 |
|
1036 |
/* ??? Should this occur after vm_stop? */
|
1037 |
qemu_aio_flush(); |
1038 |
|
1039 |
saved_vm_running = vm_running; |
1040 |
vm_stop(0);
|
1041 |
|
1042 |
must_delete = 0;
|
1043 |
if (name) {
|
1044 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1045 |
if (ret >= 0) { |
1046 |
must_delete = 1;
|
1047 |
} |
1048 |
} |
1049 |
memset(sn, 0, sizeof(*sn)); |
1050 |
if (must_delete) {
|
1051 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1052 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1053 |
} else {
|
1054 |
if (name)
|
1055 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1056 |
} |
1057 |
|
1058 |
/* fill auxiliary fields */
|
1059 |
#ifdef _WIN32
|
1060 |
_ftime(&tb); |
1061 |
sn->date_sec = tb.time; |
1062 |
sn->date_nsec = tb.millitm * 1000000;
|
1063 |
#else
|
1064 |
gettimeofday(&tv, NULL);
|
1065 |
sn->date_sec = tv.tv_sec; |
1066 |
sn->date_nsec = tv.tv_usec * 1000;
|
1067 |
#endif
|
1068 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1069 |
|
1070 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1071 |
term_printf("Device %s does not support VM state snapshots\n",
|
1072 |
bdrv_get_device_name(bs)); |
1073 |
goto the_end;
|
1074 |
} |
1075 |
|
1076 |
/* save the VM state */
|
1077 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
|
1078 |
if (!f) {
|
1079 |
term_printf("Could not open VM state file\n");
|
1080 |
goto the_end;
|
1081 |
} |
1082 |
ret = qemu_savevm_state(f); |
1083 |
vm_state_size = qemu_ftell(f); |
1084 |
qemu_fclose(f); |
1085 |
if (ret < 0) { |
1086 |
term_printf("Error %d while writing VM\n", ret);
|
1087 |
goto the_end;
|
1088 |
} |
1089 |
|
1090 |
/* create the snapshots */
|
1091 |
|
1092 |
for(i = 0; i < nb_drives; i++) { |
1093 |
bs1 = drives_table[i].bdrv; |
1094 |
if (bdrv_has_snapshot(bs1)) {
|
1095 |
if (must_delete) {
|
1096 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1097 |
if (ret < 0) { |
1098 |
term_printf("Error while deleting snapshot on '%s'\n",
|
1099 |
bdrv_get_device_name(bs1)); |
1100 |
} |
1101 |
} |
1102 |
/* Write VM state size only to the image that contains the state */
|
1103 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1104 |
ret = bdrv_snapshot_create(bs1, sn); |
1105 |
if (ret < 0) { |
1106 |
term_printf("Error while creating snapshot on '%s'\n",
|
1107 |
bdrv_get_device_name(bs1)); |
1108 |
} |
1109 |
} |
1110 |
} |
1111 |
|
1112 |
the_end:
|
1113 |
if (saved_vm_running)
|
1114 |
vm_start(); |
1115 |
} |
1116 |
|
1117 |
void do_loadvm(const char *name) |
1118 |
{ |
1119 |
BlockDriverState *bs, *bs1; |
1120 |
BlockDriverInfo bdi1, *bdi = &bdi1; |
1121 |
QEMUSnapshotInfo sn; |
1122 |
QEMUFile *f; |
1123 |
int i, ret;
|
1124 |
int saved_vm_running;
|
1125 |
|
1126 |
bs = get_bs_snapshots(); |
1127 |
if (!bs) {
|
1128 |
term_printf("No block device supports snapshots\n");
|
1129 |
return;
|
1130 |
} |
1131 |
|
1132 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1133 |
qemu_aio_flush(); |
1134 |
|
1135 |
saved_vm_running = vm_running; |
1136 |
vm_stop(0);
|
1137 |
|
1138 |
for(i = 0; i <= nb_drives; i++) { |
1139 |
bs1 = drives_table[i].bdrv; |
1140 |
if (bdrv_has_snapshot(bs1)) {
|
1141 |
ret = bdrv_snapshot_goto(bs1, name); |
1142 |
if (ret < 0) { |
1143 |
if (bs != bs1)
|
1144 |
term_printf("Warning: ");
|
1145 |
switch(ret) {
|
1146 |
case -ENOTSUP:
|
1147 |
term_printf("Snapshots not supported on device '%s'\n",
|
1148 |
bdrv_get_device_name(bs1)); |
1149 |
break;
|
1150 |
case -ENOENT:
|
1151 |
term_printf("Could not find snapshot '%s' on device '%s'\n",
|
1152 |
name, bdrv_get_device_name(bs1)); |
1153 |
break;
|
1154 |
default:
|
1155 |
term_printf("Error %d while activating snapshot on '%s'\n",
|
1156 |
ret, bdrv_get_device_name(bs1)); |
1157 |
break;
|
1158 |
} |
1159 |
/* fatal on snapshot block device */
|
1160 |
if (bs == bs1)
|
1161 |
goto the_end;
|
1162 |
} |
1163 |
} |
1164 |
} |
1165 |
|
1166 |
if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) { |
1167 |
term_printf("Device %s does not support VM state snapshots\n",
|
1168 |
bdrv_get_device_name(bs)); |
1169 |
return;
|
1170 |
} |
1171 |
|
1172 |
/* Don't even try to load empty VM states */
|
1173 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1174 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1175 |
goto the_end;
|
1176 |
|
1177 |
/* restore the VM state */
|
1178 |
f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
|
1179 |
if (!f) {
|
1180 |
term_printf("Could not open VM state file\n");
|
1181 |
goto the_end;
|
1182 |
} |
1183 |
ret = qemu_loadvm_state(f); |
1184 |
qemu_fclose(f); |
1185 |
if (ret < 0) { |
1186 |
term_printf("Error %d while loading VM state\n", ret);
|
1187 |
} |
1188 |
the_end:
|
1189 |
if (saved_vm_running)
|
1190 |
vm_start(); |
1191 |
} |
1192 |
|
1193 |
void do_delvm(const char *name) |
1194 |
{ |
1195 |
BlockDriverState *bs, *bs1; |
1196 |
int i, ret;
|
1197 |
|
1198 |
bs = get_bs_snapshots(); |
1199 |
if (!bs) {
|
1200 |
term_printf("No block device supports snapshots\n");
|
1201 |
return;
|
1202 |
} |
1203 |
|
1204 |
for(i = 0; i <= nb_drives; i++) { |
1205 |
bs1 = drives_table[i].bdrv; |
1206 |
if (bdrv_has_snapshot(bs1)) {
|
1207 |
ret = bdrv_snapshot_delete(bs1, name); |
1208 |
if (ret < 0) { |
1209 |
if (ret == -ENOTSUP)
|
1210 |
term_printf("Snapshots not supported on device '%s'\n",
|
1211 |
bdrv_get_device_name(bs1)); |
1212 |
else
|
1213 |
term_printf("Error %d while deleting snapshot on '%s'\n",
|
1214 |
ret, bdrv_get_device_name(bs1)); |
1215 |
} |
1216 |
} |
1217 |
} |
1218 |
} |
1219 |
|
1220 |
void do_info_snapshots(void) |
1221 |
{ |
1222 |
BlockDriverState *bs, *bs1; |
1223 |
QEMUSnapshotInfo *sn_tab, *sn; |
1224 |
int nb_sns, i;
|
1225 |
char buf[256]; |
1226 |
|
1227 |
bs = get_bs_snapshots(); |
1228 |
if (!bs) {
|
1229 |
term_printf("No available block device supports snapshots\n");
|
1230 |
return;
|
1231 |
} |
1232 |
term_printf("Snapshot devices:");
|
1233 |
for(i = 0; i <= nb_drives; i++) { |
1234 |
bs1 = drives_table[i].bdrv; |
1235 |
if (bdrv_has_snapshot(bs1)) {
|
1236 |
if (bs == bs1)
|
1237 |
term_printf(" %s", bdrv_get_device_name(bs1));
|
1238 |
} |
1239 |
} |
1240 |
term_printf("\n");
|
1241 |
|
1242 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1243 |
if (nb_sns < 0) { |
1244 |
term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
|
1245 |
return;
|
1246 |
} |
1247 |
term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
|
1248 |
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1249 |
for(i = 0; i < nb_sns; i++) { |
1250 |
sn = &sn_tab[i]; |
1251 |
term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1252 |
} |
1253 |
qemu_free(sn_tab); |
1254 |
} |