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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
25 |
#include <fcntl.h> |
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#include <signal.h> |
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#include <time.h> |
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#include <errno.h> |
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#include <sys/time.h> |
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#include <zlib.h> |
31 |
|
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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.h" |
34 |
|
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#ifndef _WIN32
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#include <sys/times.h> |
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#include <sys/wait.h> |
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#include <termios.h> |
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#include <sys/mman.h> |
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#include <sys/ioctl.h> |
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#include <sys/resource.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <net/if.h> |
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#if defined(__NetBSD__)
|
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#include <net/if_tap.h> |
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#endif
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#ifdef __linux__
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#include <linux/if_tun.h> |
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#endif
|
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#include <arpa/inet.h> |
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#include <dirent.h> |
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#include <netdb.h> |
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#include <sys/select.h> |
55 |
#ifdef CONFIG_BSD
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#include <sys/stat.h> |
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#if defined(__FreeBSD__) || defined(__DragonFly__)
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#include <libutil.h> |
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#else
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#include <util.h> |
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#endif
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#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
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#include <freebsd/stdlib.h> |
64 |
#else
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#ifdef __linux__
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#include <pty.h> |
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#include <malloc.h> |
68 |
#include <linux/rtc.h> |
69 |
#endif
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#endif
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#endif
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|
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#ifdef _WIN32
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#include <windows.h> |
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#include <malloc.h> |
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#include <sys/timeb.h> |
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#include <mmsystem.h> |
78 |
#define getopt_long_only getopt_long
|
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#define memalign(align, size) malloc(size)
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#endif
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81 |
|
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#include "qemu-common.h" |
83 |
#include "hw/hw.h" |
84 |
#include "net.h" |
85 |
#include "monitor.h" |
86 |
#include "sysemu.h" |
87 |
#include "qemu-timer.h" |
88 |
#include "qemu-char.h" |
89 |
#include "block.h" |
90 |
#include "audio/audio.h" |
91 |
#include "migration.h" |
92 |
#include "qemu_socket.h" |
93 |
#include "qemu-queue.h" |
94 |
|
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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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97 |
|
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#define SELF_ANNOUNCE_ROUNDS 5 |
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#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */ |
100 |
//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
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#define EXPERIMENTAL_MAGIC 0xf1f23f4f |
102 |
|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{ |
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uint32_t magic = EXPERIMENTAL_MAGIC; |
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uint16_t proto = htons(ETH_P_EXPERIMENTAL); |
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|
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/* FIXME: should we send a different packet (arp/rarp/ping)? */
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|
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memset(buf, 0, 64); |
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memset(buf, 0xff, 6); /* h_dst */ |
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memcpy(buf + 6, mac_addr, 6); /* h_src */ |
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memcpy(buf + 12, &proto, 2); /* h_proto */ |
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memcpy(buf + 14, &magic, 4); /* magic */ |
116 |
|
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return 64; /* len */ |
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} |
119 |
|
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static void qemu_announce_self_once(void *opaque) |
121 |
{ |
122 |
int i, len;
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VLANState *vlan; |
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VLANClientState *vc; |
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uint8_t buf[256];
|
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static int count = SELF_ANNOUNCE_ROUNDS; |
127 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
128 |
|
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for (i = 0; i < MAX_NICS; i++) { |
130 |
if (!nd_table[i].used)
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continue;
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len = announce_self_create(buf, nd_table[i].macaddr); |
133 |
vlan = nd_table[i].vlan; |
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for(vc = vlan->first_client; vc != NULL; vc = vc->next) { |
135 |
vc->receive(vc, buf, len); |
136 |
} |
137 |
} |
138 |
if (count--) {
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qemu_mod_timer(timer, qemu_get_clock(rt_clock) + 100);
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140 |
} else {
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qemu_del_timer(timer); |
142 |
qemu_free_timer(timer); |
143 |
} |
144 |
} |
145 |
|
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void qemu_announce_self(void) |
147 |
{ |
148 |
static QEMUTimer *timer;
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timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
150 |
qemu_announce_self_once(&timer); |
151 |
} |
152 |
|
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/***********************************************************/
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/* savevm/loadvm support */
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|
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#define IO_BUF_SIZE 32768 |
157 |
|
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struct QEMUFile {
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QEMUFilePutBufferFunc *put_buffer; |
160 |
QEMUFileGetBufferFunc *get_buffer; |
161 |
QEMUFileCloseFunc *close; |
162 |
QEMUFileRateLimit *rate_limit; |
163 |
QEMUFileSetRateLimit *set_rate_limit; |
164 |
void *opaque;
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int is_write;
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166 |
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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]; |
172 |
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int has_error;
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}; |
175 |
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typedef struct QEMUFileStdio |
177 |
{ |
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FILE *stdio_file; |
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QEMUFile *file; |
180 |
} QEMUFileStdio; |
181 |
|
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typedef struct QEMUFileSocket |
183 |
{ |
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int fd;
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QEMUFile *file; |
186 |
} QEMUFileSocket; |
187 |
|
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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; |
192 |
|
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do {
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len = recv(s->fd, (void *)buf, size, 0); |
195 |
} while (len == -1 && socket_error() == EINTR); |
196 |
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197 |
if (len == -1) |
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len = -socket_error(); |
199 |
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return len;
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} |
202 |
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static int socket_close(void *opaque) |
204 |
{ |
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QEMUFileSocket *s = opaque; |
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qemu_free(s); |
207 |
return 0; |
208 |
} |
209 |
|
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static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileStdio *s = opaque; |
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return fwrite(buf, 1, size, s->stdio_file); |
214 |
} |
215 |
|
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
217 |
{ |
218 |
QEMUFileStdio *s = opaque; |
219 |
FILE *fp = s->stdio_file; |
220 |
int bytes;
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221 |
|
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do {
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223 |
clearerr(fp); |
224 |
bytes = fread(buf, 1, size, fp);
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
226 |
return bytes;
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} |
228 |
|
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static int stdio_pclose(void *opaque) |
230 |
{ |
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QEMUFileStdio *s = opaque; |
232 |
pclose(s->stdio_file); |
233 |
qemu_free(s); |
234 |
return 0; |
235 |
} |
236 |
|
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static int stdio_fclose(void *opaque) |
238 |
{ |
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QEMUFileStdio *s = opaque; |
240 |
fclose(s->stdio_file); |
241 |
qemu_free(s); |
242 |
return 0; |
243 |
} |
244 |
|
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QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
246 |
{ |
247 |
QEMUFileStdio *s; |
248 |
|
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if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
250 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL; |
252 |
} |
253 |
|
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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255 |
|
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s->stdio_file = stdio_file; |
257 |
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if(mode[0] == 'r') { |
259 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL); |
260 |
} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL); |
262 |
} |
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return s->file;
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} |
265 |
|
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
267 |
{ |
268 |
FILE *popen_file; |
269 |
|
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popen_file = popen(command, mode); |
271 |
if(popen_file == NULL) { |
272 |
return NULL; |
273 |
} |
274 |
|
275 |
return qemu_popen(popen_file, mode);
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276 |
} |
277 |
|
278 |
int qemu_stdio_fd(QEMUFile *f)
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{ |
280 |
QEMUFileStdio *p; |
281 |
int fd;
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282 |
|
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p = (QEMUFileStdio *)f->opaque; |
284 |
fd = fileno(p->stdio_file); |
285 |
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return fd;
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287 |
} |
288 |
|
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QEMUFile *qemu_fdopen(int fd, const char *mode) |
290 |
{ |
291 |
QEMUFileStdio *s; |
292 |
|
293 |
if (mode == NULL || |
294 |
(mode[0] != 'r' && mode[0] != 'w') || |
295 |
mode[1] != 'b' || mode[2] != 0) { |
296 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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297 |
return NULL; |
298 |
} |
299 |
|
300 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
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301 |
s->stdio_file = fdopen(fd, mode); |
302 |
if (!s->stdio_file)
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303 |
goto fail;
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304 |
|
305 |
if(mode[0] == 'r') { |
306 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL); |
307 |
} else {
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308 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL); |
309 |
} |
310 |
return s->file;
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311 |
|
312 |
fail:
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313 |
qemu_free(s); |
314 |
return NULL; |
315 |
} |
316 |
|
317 |
QEMUFile *qemu_fopen_socket(int fd)
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318 |
{ |
319 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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320 |
|
321 |
s->fd = fd; |
322 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
323 |
return s->file;
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324 |
} |
325 |
|
326 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
327 |
int64_t pos, int size)
|
328 |
{ |
329 |
QEMUFileStdio *s = opaque; |
330 |
fseek(s->stdio_file, pos, SEEK_SET); |
331 |
fwrite(buf, 1, size, s->stdio_file);
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332 |
return size;
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333 |
} |
334 |
|
335 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
336 |
{ |
337 |
QEMUFileStdio *s = opaque; |
338 |
fseek(s->stdio_file, pos, SEEK_SET); |
339 |
return fread(buf, 1, size, s->stdio_file); |
340 |
} |
341 |
|
342 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
343 |
{ |
344 |
QEMUFileStdio *s; |
345 |
|
346 |
if (mode == NULL || |
347 |
(mode[0] != 'r' && mode[0] != 'w') || |
348 |
mode[1] != 'b' || mode[2] != 0) { |
349 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
350 |
return NULL; |
351 |
} |
352 |
|
353 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
354 |
|
355 |
s->stdio_file = fopen(filename, mode); |
356 |
if (!s->stdio_file)
|
357 |
goto fail;
|
358 |
|
359 |
if(mode[0] == 'w') { |
360 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL); |
361 |
} else {
|
362 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL); |
363 |
} |
364 |
return s->file;
|
365 |
fail:
|
366 |
qemu_free(s); |
367 |
return NULL; |
368 |
} |
369 |
|
370 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
371 |
int64_t pos, int size)
|
372 |
{ |
373 |
bdrv_save_vmstate(opaque, buf, pos, size); |
374 |
return size;
|
375 |
} |
376 |
|
377 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
378 |
{ |
379 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
380 |
} |
381 |
|
382 |
static int bdrv_fclose(void *opaque) |
383 |
{ |
384 |
return 0; |
385 |
} |
386 |
|
387 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
388 |
{ |
389 |
if (is_writable)
|
390 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
391 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
392 |
} |
393 |
|
394 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
395 |
QEMUFileGetBufferFunc *get_buffer, |
396 |
QEMUFileCloseFunc *close, |
397 |
QEMUFileRateLimit *rate_limit, |
398 |
QEMUFileSetRateLimit *set_rate_limit) |
399 |
{ |
400 |
QEMUFile *f; |
401 |
|
402 |
f = qemu_mallocz(sizeof(QEMUFile));
|
403 |
|
404 |
f->opaque = opaque; |
405 |
f->put_buffer = put_buffer; |
406 |
f->get_buffer = get_buffer; |
407 |
f->close = close; |
408 |
f->rate_limit = rate_limit; |
409 |
f->set_rate_limit = set_rate_limit; |
410 |
f->is_write = 0;
|
411 |
|
412 |
return f;
|
413 |
} |
414 |
|
415 |
int qemu_file_has_error(QEMUFile *f)
|
416 |
{ |
417 |
return f->has_error;
|
418 |
} |
419 |
|
420 |
void qemu_file_set_error(QEMUFile *f)
|
421 |
{ |
422 |
f->has_error = 1;
|
423 |
} |
424 |
|
425 |
void qemu_fflush(QEMUFile *f)
|
426 |
{ |
427 |
if (!f->put_buffer)
|
428 |
return;
|
429 |
|
430 |
if (f->is_write && f->buf_index > 0) { |
431 |
int len;
|
432 |
|
433 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
434 |
if (len > 0) |
435 |
f->buf_offset += f->buf_index; |
436 |
else
|
437 |
f->has_error = 1;
|
438 |
f->buf_index = 0;
|
439 |
} |
440 |
} |
441 |
|
442 |
static void qemu_fill_buffer(QEMUFile *f) |
443 |
{ |
444 |
int len;
|
445 |
|
446 |
if (!f->get_buffer)
|
447 |
return;
|
448 |
|
449 |
if (f->is_write)
|
450 |
abort(); |
451 |
|
452 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
453 |
if (len > 0) { |
454 |
f->buf_index = 0;
|
455 |
f->buf_size = len; |
456 |
f->buf_offset += len; |
457 |
} else if (len != -EAGAIN) |
458 |
f->has_error = 1;
|
459 |
} |
460 |
|
461 |
int qemu_fclose(QEMUFile *f)
|
462 |
{ |
463 |
int ret = 0; |
464 |
qemu_fflush(f); |
465 |
if (f->close)
|
466 |
ret = f->close(f->opaque); |
467 |
qemu_free(f); |
468 |
return ret;
|
469 |
} |
470 |
|
471 |
void qemu_file_put_notify(QEMUFile *f)
|
472 |
{ |
473 |
f->put_buffer(f->opaque, NULL, 0, 0); |
474 |
} |
475 |
|
476 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
477 |
{ |
478 |
int l;
|
479 |
|
480 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
481 |
fprintf(stderr, |
482 |
"Attempted to write to buffer while read buffer is not empty\n");
|
483 |
abort(); |
484 |
} |
485 |
|
486 |
while (!f->has_error && size > 0) { |
487 |
l = IO_BUF_SIZE - f->buf_index; |
488 |
if (l > size)
|
489 |
l = size; |
490 |
memcpy(f->buf + f->buf_index, buf, l); |
491 |
f->is_write = 1;
|
492 |
f->buf_index += l; |
493 |
buf += l; |
494 |
size -= l; |
495 |
if (f->buf_index >= IO_BUF_SIZE)
|
496 |
qemu_fflush(f); |
497 |
} |
498 |
} |
499 |
|
500 |
void qemu_put_byte(QEMUFile *f, int v) |
501 |
{ |
502 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
503 |
fprintf(stderr, |
504 |
"Attempted to write to buffer while read buffer is not empty\n");
|
505 |
abort(); |
506 |
} |
507 |
|
508 |
f->buf[f->buf_index++] = v; |
509 |
f->is_write = 1;
|
510 |
if (f->buf_index >= IO_BUF_SIZE)
|
511 |
qemu_fflush(f); |
512 |
} |
513 |
|
514 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
515 |
{ |
516 |
int size, l;
|
517 |
|
518 |
if (f->is_write)
|
519 |
abort(); |
520 |
|
521 |
size = size1; |
522 |
while (size > 0) { |
523 |
l = f->buf_size - f->buf_index; |
524 |
if (l == 0) { |
525 |
qemu_fill_buffer(f); |
526 |
l = f->buf_size - f->buf_index; |
527 |
if (l == 0) |
528 |
break;
|
529 |
} |
530 |
if (l > size)
|
531 |
l = size; |
532 |
memcpy(buf, f->buf + f->buf_index, l); |
533 |
f->buf_index += l; |
534 |
buf += l; |
535 |
size -= l; |
536 |
} |
537 |
return size1 - size;
|
538 |
} |
539 |
|
540 |
int qemu_get_byte(QEMUFile *f)
|
541 |
{ |
542 |
if (f->is_write)
|
543 |
abort(); |
544 |
|
545 |
if (f->buf_index >= f->buf_size) {
|
546 |
qemu_fill_buffer(f); |
547 |
if (f->buf_index >= f->buf_size)
|
548 |
return 0; |
549 |
} |
550 |
return f->buf[f->buf_index++];
|
551 |
} |
552 |
|
553 |
int64_t qemu_ftell(QEMUFile *f) |
554 |
{ |
555 |
return f->buf_offset - f->buf_size + f->buf_index;
|
556 |
} |
557 |
|
558 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
559 |
{ |
560 |
if (whence == SEEK_SET) {
|
561 |
/* nothing to do */
|
562 |
} else if (whence == SEEK_CUR) { |
563 |
pos += qemu_ftell(f); |
564 |
} else {
|
565 |
/* SEEK_END not supported */
|
566 |
return -1; |
567 |
} |
568 |
if (f->put_buffer) {
|
569 |
qemu_fflush(f); |
570 |
f->buf_offset = pos; |
571 |
} else {
|
572 |
f->buf_offset = pos; |
573 |
f->buf_index = 0;
|
574 |
f->buf_size = 0;
|
575 |
} |
576 |
return pos;
|
577 |
} |
578 |
|
579 |
int qemu_file_rate_limit(QEMUFile *f)
|
580 |
{ |
581 |
if (f->rate_limit)
|
582 |
return f->rate_limit(f->opaque);
|
583 |
|
584 |
return 0; |
585 |
} |
586 |
|
587 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
588 |
{ |
589 |
/* any failed or completed migration keeps its state to allow probing of
|
590 |
* migration data, but has no associated file anymore */
|
591 |
if (f && f->set_rate_limit)
|
592 |
return f->set_rate_limit(f->opaque, new_rate);
|
593 |
|
594 |
return 0; |
595 |
} |
596 |
|
597 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
598 |
{ |
599 |
qemu_put_byte(f, v >> 8);
|
600 |
qemu_put_byte(f, v); |
601 |
} |
602 |
|
603 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
604 |
{ |
605 |
qemu_put_byte(f, v >> 24);
|
606 |
qemu_put_byte(f, v >> 16);
|
607 |
qemu_put_byte(f, v >> 8);
|
608 |
qemu_put_byte(f, v); |
609 |
} |
610 |
|
611 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
612 |
{ |
613 |
qemu_put_be32(f, v >> 32);
|
614 |
qemu_put_be32(f, v); |
615 |
} |
616 |
|
617 |
unsigned int qemu_get_be16(QEMUFile *f) |
618 |
{ |
619 |
unsigned int v; |
620 |
v = qemu_get_byte(f) << 8;
|
621 |
v |= qemu_get_byte(f); |
622 |
return v;
|
623 |
} |
624 |
|
625 |
unsigned int qemu_get_be32(QEMUFile *f) |
626 |
{ |
627 |
unsigned int v; |
628 |
v = qemu_get_byte(f) << 24;
|
629 |
v |= qemu_get_byte(f) << 16;
|
630 |
v |= qemu_get_byte(f) << 8;
|
631 |
v |= qemu_get_byte(f); |
632 |
return v;
|
633 |
} |
634 |
|
635 |
uint64_t qemu_get_be64(QEMUFile *f) |
636 |
{ |
637 |
uint64_t v; |
638 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
639 |
v |= qemu_get_be32(f); |
640 |
return v;
|
641 |
} |
642 |
|
643 |
/* 8 bit int */
|
644 |
|
645 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
646 |
{ |
647 |
int8_t *v = pv; |
648 |
qemu_get_s8s(f, v); |
649 |
return 0; |
650 |
} |
651 |
|
652 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
653 |
{ |
654 |
int8_t *v = pv; |
655 |
qemu_put_s8s(f, v); |
656 |
} |
657 |
|
658 |
const VMStateInfo vmstate_info_int8 = {
|
659 |
.name = "int8",
|
660 |
.get = get_int8, |
661 |
.put = put_int8, |
662 |
}; |
663 |
|
664 |
/* 16 bit int */
|
665 |
|
666 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
667 |
{ |
668 |
int16_t *v = pv; |
669 |
qemu_get_sbe16s(f, v); |
670 |
return 0; |
671 |
} |
672 |
|
673 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
674 |
{ |
675 |
int16_t *v = pv; |
676 |
qemu_put_sbe16s(f, v); |
677 |
} |
678 |
|
679 |
const VMStateInfo vmstate_info_int16 = {
|
680 |
.name = "int16",
|
681 |
.get = get_int16, |
682 |
.put = put_int16, |
683 |
}; |
684 |
|
685 |
/* 32 bit int */
|
686 |
|
687 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
688 |
{ |
689 |
int32_t *v = pv; |
690 |
qemu_get_sbe32s(f, v); |
691 |
return 0; |
692 |
} |
693 |
|
694 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
695 |
{ |
696 |
int32_t *v = pv; |
697 |
qemu_put_sbe32s(f, v); |
698 |
} |
699 |
|
700 |
const VMStateInfo vmstate_info_int32 = {
|
701 |
.name = "int32",
|
702 |
.get = get_int32, |
703 |
.put = put_int32, |
704 |
}; |
705 |
|
706 |
/* 32 bit int. See that the received value is the same than the one
|
707 |
in the field */
|
708 |
|
709 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
710 |
{ |
711 |
int32_t *v = pv; |
712 |
int32_t v2; |
713 |
qemu_get_sbe32s(f, &v2); |
714 |
|
715 |
if (*v == v2)
|
716 |
return 0; |
717 |
return -EINVAL;
|
718 |
} |
719 |
|
720 |
const VMStateInfo vmstate_info_int32_equal = {
|
721 |
.name = "int32 equal",
|
722 |
.get = get_int32_equal, |
723 |
.put = put_int32, |
724 |
}; |
725 |
|
726 |
/* 32 bit int. See that the received value is the less or the same
|
727 |
than the one in the field */
|
728 |
|
729 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
730 |
{ |
731 |
int32_t *old = pv; |
732 |
int32_t new; |
733 |
qemu_get_sbe32s(f, &new); |
734 |
|
735 |
if (*old <= new)
|
736 |
return 0; |
737 |
return -EINVAL;
|
738 |
} |
739 |
|
740 |
const VMStateInfo vmstate_info_int32_le = {
|
741 |
.name = "int32 equal",
|
742 |
.get = get_int32_le, |
743 |
.put = put_int32, |
744 |
}; |
745 |
|
746 |
/* 64 bit int */
|
747 |
|
748 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
749 |
{ |
750 |
int64_t *v = pv; |
751 |
qemu_get_sbe64s(f, v); |
752 |
return 0; |
753 |
} |
754 |
|
755 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
756 |
{ |
757 |
int64_t *v = pv; |
758 |
qemu_put_sbe64s(f, v); |
759 |
} |
760 |
|
761 |
const VMStateInfo vmstate_info_int64 = {
|
762 |
.name = "int64",
|
763 |
.get = get_int64, |
764 |
.put = put_int64, |
765 |
}; |
766 |
|
767 |
/* 8 bit unsigned int */
|
768 |
|
769 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
770 |
{ |
771 |
uint8_t *v = pv; |
772 |
qemu_get_8s(f, v); |
773 |
return 0; |
774 |
} |
775 |
|
776 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
777 |
{ |
778 |
uint8_t *v = pv; |
779 |
qemu_put_8s(f, v); |
780 |
} |
781 |
|
782 |
const VMStateInfo vmstate_info_uint8 = {
|
783 |
.name = "uint8",
|
784 |
.get = get_uint8, |
785 |
.put = put_uint8, |
786 |
}; |
787 |
|
788 |
/* 16 bit unsigned int */
|
789 |
|
790 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
791 |
{ |
792 |
uint16_t *v = pv; |
793 |
qemu_get_be16s(f, v); |
794 |
return 0; |
795 |
} |
796 |
|
797 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
798 |
{ |
799 |
uint16_t *v = pv; |
800 |
qemu_put_be16s(f, v); |
801 |
} |
802 |
|
803 |
const VMStateInfo vmstate_info_uint16 = {
|
804 |
.name = "uint16",
|
805 |
.get = get_uint16, |
806 |
.put = put_uint16, |
807 |
}; |
808 |
|
809 |
/* 32 bit unsigned int */
|
810 |
|
811 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
812 |
{ |
813 |
uint32_t *v = pv; |
814 |
qemu_get_be32s(f, v); |
815 |
return 0; |
816 |
} |
817 |
|
818 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
819 |
{ |
820 |
uint32_t *v = pv; |
821 |
qemu_put_be32s(f, v); |
822 |
} |
823 |
|
824 |
const VMStateInfo vmstate_info_uint32 = {
|
825 |
.name = "uint32",
|
826 |
.get = get_uint32, |
827 |
.put = put_uint32, |
828 |
}; |
829 |
|
830 |
/* 64 bit unsigned int */
|
831 |
|
832 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
833 |
{ |
834 |
uint64_t *v = pv; |
835 |
qemu_get_be64s(f, v); |
836 |
return 0; |
837 |
} |
838 |
|
839 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
840 |
{ |
841 |
uint64_t *v = pv; |
842 |
qemu_put_be64s(f, v); |
843 |
} |
844 |
|
845 |
const VMStateInfo vmstate_info_uint64 = {
|
846 |
.name = "uint64",
|
847 |
.get = get_uint64, |
848 |
.put = put_uint64, |
849 |
}; |
850 |
|
851 |
/* 8 bit int. See that the received value is the same than the one
|
852 |
in the field */
|
853 |
|
854 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
855 |
{ |
856 |
uint8_t *v = pv; |
857 |
uint8_t v2; |
858 |
qemu_get_8s(f, &v2); |
859 |
|
860 |
if (*v == v2)
|
861 |
return 0; |
862 |
return -EINVAL;
|
863 |
} |
864 |
|
865 |
const VMStateInfo vmstate_info_uint8_equal = {
|
866 |
.name = "int32 equal",
|
867 |
.get = get_uint8_equal, |
868 |
.put = put_uint8, |
869 |
}; |
870 |
|
871 |
/* timers */
|
872 |
|
873 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
874 |
{ |
875 |
QEMUTimer *v = pv; |
876 |
qemu_get_timer(f, v); |
877 |
return 0; |
878 |
} |
879 |
|
880 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
881 |
{ |
882 |
QEMUTimer *v = pv; |
883 |
qemu_put_timer(f, v); |
884 |
} |
885 |
|
886 |
const VMStateInfo vmstate_info_timer = {
|
887 |
.name = "timer",
|
888 |
.get = get_timer, |
889 |
.put = put_timer, |
890 |
}; |
891 |
|
892 |
/* uint8_t buffers */
|
893 |
|
894 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
895 |
{ |
896 |
uint8_t *v = pv; |
897 |
qemu_get_buffer(f, v, size); |
898 |
return 0; |
899 |
} |
900 |
|
901 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
902 |
{ |
903 |
uint8_t *v = pv; |
904 |
qemu_put_buffer(f, v, size); |
905 |
} |
906 |
|
907 |
const VMStateInfo vmstate_info_buffer = {
|
908 |
.name = "buffer",
|
909 |
.get = get_buffer, |
910 |
.put = put_buffer, |
911 |
}; |
912 |
|
913 |
typedef struct SaveStateEntry { |
914 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
915 |
char idstr[256]; |
916 |
int instance_id;
|
917 |
int version_id;
|
918 |
int section_id;
|
919 |
SaveLiveStateHandler *save_live_state; |
920 |
SaveStateHandler *save_state; |
921 |
LoadStateHandler *load_state; |
922 |
const VMStateDescription *vmsd;
|
923 |
void *opaque;
|
924 |
} SaveStateEntry; |
925 |
|
926 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
927 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
928 |
static int global_section_id; |
929 |
|
930 |
static int calculate_new_instance_id(const char *idstr) |
931 |
{ |
932 |
SaveStateEntry *se; |
933 |
int instance_id = 0; |
934 |
|
935 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
936 |
if (strcmp(idstr, se->idstr) == 0 |
937 |
&& instance_id <= se->instance_id) { |
938 |
instance_id = se->instance_id + 1;
|
939 |
} |
940 |
} |
941 |
return instance_id;
|
942 |
} |
943 |
|
944 |
/* TODO: Individual devices generally have very little idea about the rest
|
945 |
of the system, so instance_id should be removed/replaced.
|
946 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
947 |
distinguishing id for all instances of your device class. */
|
948 |
int register_savevm_live(const char *idstr, |
949 |
int instance_id,
|
950 |
int version_id,
|
951 |
SaveLiveStateHandler *save_live_state, |
952 |
SaveStateHandler *save_state, |
953 |
LoadStateHandler *load_state, |
954 |
void *opaque)
|
955 |
{ |
956 |
SaveStateEntry *se; |
957 |
|
958 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
959 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
960 |
se->version_id = version_id; |
961 |
se->section_id = global_section_id++; |
962 |
se->save_live_state = save_live_state; |
963 |
se->save_state = save_state; |
964 |
se->load_state = load_state; |
965 |
se->opaque = opaque; |
966 |
se->vmsd = NULL;
|
967 |
|
968 |
if (instance_id == -1) { |
969 |
se->instance_id = calculate_new_instance_id(idstr); |
970 |
} else {
|
971 |
se->instance_id = instance_id; |
972 |
} |
973 |
/* add at the end of list */
|
974 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
975 |
return 0; |
976 |
} |
977 |
|
978 |
int register_savevm(const char *idstr, |
979 |
int instance_id,
|
980 |
int version_id,
|
981 |
SaveStateHandler *save_state, |
982 |
LoadStateHandler *load_state, |
983 |
void *opaque)
|
984 |
{ |
985 |
return register_savevm_live(idstr, instance_id, version_id,
|
986 |
NULL, save_state, load_state, opaque);
|
987 |
} |
988 |
|
989 |
void unregister_savevm(const char *idstr, void *opaque) |
990 |
{ |
991 |
SaveStateEntry *se, *new_se; |
992 |
|
993 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
994 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
995 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
996 |
qemu_free(se); |
997 |
} |
998 |
} |
999 |
} |
1000 |
|
1001 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
1002 |
void *opaque)
|
1003 |
{ |
1004 |
SaveStateEntry *se; |
1005 |
|
1006 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
1007 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
1008 |
se->version_id = vmsd->version_id; |
1009 |
se->section_id = global_section_id++; |
1010 |
se->save_live_state = NULL;
|
1011 |
se->save_state = NULL;
|
1012 |
se->load_state = NULL;
|
1013 |
se->opaque = opaque; |
1014 |
se->vmsd = vmsd; |
1015 |
|
1016 |
if (instance_id == -1) { |
1017 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
1018 |
} else {
|
1019 |
se->instance_id = instance_id; |
1020 |
} |
1021 |
/* add at the end of list */
|
1022 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1023 |
return 0; |
1024 |
} |
1025 |
|
1026 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
1027 |
{ |
1028 |
SaveStateEntry *se, *new_se; |
1029 |
|
1030 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1031 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1032 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1033 |
qemu_free(se); |
1034 |
} |
1035 |
} |
1036 |
} |
1037 |
|
1038 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1039 |
void *opaque, int version_id) |
1040 |
{ |
1041 |
VMStateField *field = vmsd->fields; |
1042 |
|
1043 |
if (version_id > vmsd->version_id) {
|
1044 |
return -EINVAL;
|
1045 |
} |
1046 |
if (version_id < vmsd->minimum_version_id_old) {
|
1047 |
return -EINVAL;
|
1048 |
} |
1049 |
if (version_id < vmsd->minimum_version_id) {
|
1050 |
return vmsd->load_state_old(f, opaque, version_id);
|
1051 |
} |
1052 |
if (vmsd->pre_load) {
|
1053 |
int ret = vmsd->pre_load(opaque);
|
1054 |
if (ret)
|
1055 |
return ret;
|
1056 |
} |
1057 |
while(field->name) {
|
1058 |
if (field->version_id <= version_id) {
|
1059 |
void *base_addr = opaque + field->offset;
|
1060 |
int ret, i, n_elems = 1; |
1061 |
|
1062 |
if (field->flags & VMS_ARRAY) {
|
1063 |
n_elems = field->num; |
1064 |
} else if (field->flags & VMS_VARRAY) { |
1065 |
n_elems = *(size_t *)(opaque+field->num_offset); |
1066 |
} |
1067 |
if (field->flags & VMS_POINTER) {
|
1068 |
base_addr = *(void **)base_addr;
|
1069 |
} |
1070 |
for (i = 0; i < n_elems; i++) { |
1071 |
void *addr = base_addr + field->size * i;
|
1072 |
|
1073 |
if (field->flags & VMS_STRUCT) {
|
1074 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1075 |
} else {
|
1076 |
ret = field->info->get(f, addr, field->size); |
1077 |
|
1078 |
} |
1079 |
if (ret < 0) { |
1080 |
return ret;
|
1081 |
} |
1082 |
} |
1083 |
} |
1084 |
field++; |
1085 |
} |
1086 |
if (vmsd->post_load) {
|
1087 |
return vmsd->post_load(opaque, version_id);
|
1088 |
} |
1089 |
return 0; |
1090 |
} |
1091 |
|
1092 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1093 |
void *opaque)
|
1094 |
{ |
1095 |
VMStateField *field = vmsd->fields; |
1096 |
|
1097 |
if (vmsd->pre_save) {
|
1098 |
vmsd->pre_save(opaque); |
1099 |
} |
1100 |
while(field->name) {
|
1101 |
void *base_addr = opaque + field->offset;
|
1102 |
int i, n_elems = 1; |
1103 |
|
1104 |
if (field->flags & VMS_ARRAY) {
|
1105 |
n_elems = field->num; |
1106 |
} else if (field->flags & VMS_VARRAY) { |
1107 |
n_elems = *(size_t *)(opaque+field->num_offset); |
1108 |
} |
1109 |
if (field->flags & VMS_POINTER) {
|
1110 |
base_addr = *(void **)base_addr;
|
1111 |
} |
1112 |
for (i = 0; i < n_elems; i++) { |
1113 |
void *addr = base_addr + field->size * i;
|
1114 |
|
1115 |
if (field->flags & VMS_STRUCT) {
|
1116 |
vmstate_save_state(f, field->vmsd, addr); |
1117 |
} else {
|
1118 |
field->info->put(f, addr, field->size); |
1119 |
} |
1120 |
} |
1121 |
field++; |
1122 |
} |
1123 |
if (vmsd->post_save) {
|
1124 |
vmsd->post_save(opaque); |
1125 |
} |
1126 |
} |
1127 |
|
1128 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1129 |
{ |
1130 |
if (!se->vmsd) { /* Old style */ |
1131 |
return se->load_state(f, se->opaque, version_id);
|
1132 |
} |
1133 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1134 |
} |
1135 |
|
1136 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1137 |
{ |
1138 |
if (!se->vmsd) { /* Old style */ |
1139 |
se->save_state(f, se->opaque); |
1140 |
return;
|
1141 |
} |
1142 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1143 |
} |
1144 |
|
1145 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1146 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1147 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1148 |
|
1149 |
#define QEMU_VM_EOF 0x00 |
1150 |
#define QEMU_VM_SECTION_START 0x01 |
1151 |
#define QEMU_VM_SECTION_PART 0x02 |
1152 |
#define QEMU_VM_SECTION_END 0x03 |
1153 |
#define QEMU_VM_SECTION_FULL 0x04 |
1154 |
|
1155 |
int qemu_savevm_state_begin(QEMUFile *f)
|
1156 |
{ |
1157 |
SaveStateEntry *se; |
1158 |
|
1159 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1160 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1161 |
|
1162 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1163 |
int len;
|
1164 |
|
1165 |
if (se->save_live_state == NULL) |
1166 |
continue;
|
1167 |
|
1168 |
/* Section type */
|
1169 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1170 |
qemu_put_be32(f, se->section_id); |
1171 |
|
1172 |
/* ID string */
|
1173 |
len = strlen(se->idstr); |
1174 |
qemu_put_byte(f, len); |
1175 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1176 |
|
1177 |
qemu_put_be32(f, se->instance_id); |
1178 |
qemu_put_be32(f, se->version_id); |
1179 |
|
1180 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
1181 |
} |
1182 |
|
1183 |
if (qemu_file_has_error(f))
|
1184 |
return -EIO;
|
1185 |
|
1186 |
return 0; |
1187 |
} |
1188 |
|
1189 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1190 |
{ |
1191 |
SaveStateEntry *se; |
1192 |
int ret = 1; |
1193 |
|
1194 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1195 |
if (se->save_live_state == NULL) |
1196 |
continue;
|
1197 |
|
1198 |
/* Section type */
|
1199 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1200 |
qemu_put_be32(f, se->section_id); |
1201 |
|
1202 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
1203 |
} |
1204 |
|
1205 |
if (ret)
|
1206 |
return 1; |
1207 |
|
1208 |
if (qemu_file_has_error(f))
|
1209 |
return -EIO;
|
1210 |
|
1211 |
return 0; |
1212 |
} |
1213 |
|
1214 |
int qemu_savevm_state_complete(QEMUFile *f)
|
1215 |
{ |
1216 |
SaveStateEntry *se; |
1217 |
|
1218 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1219 |
if (se->save_live_state == NULL) |
1220 |
continue;
|
1221 |
|
1222 |
/* Section type */
|
1223 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1224 |
qemu_put_be32(f, se->section_id); |
1225 |
|
1226 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
1227 |
} |
1228 |
|
1229 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1230 |
int len;
|
1231 |
|
1232 |
if (se->save_state == NULL && se->vmsd == NULL) |
1233 |
continue;
|
1234 |
|
1235 |
/* Section type */
|
1236 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1237 |
qemu_put_be32(f, se->section_id); |
1238 |
|
1239 |
/* ID string */
|
1240 |
len = strlen(se->idstr); |
1241 |
qemu_put_byte(f, len); |
1242 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1243 |
|
1244 |
qemu_put_be32(f, se->instance_id); |
1245 |
qemu_put_be32(f, se->version_id); |
1246 |
|
1247 |
vmstate_save(f, se); |
1248 |
} |
1249 |
|
1250 |
qemu_put_byte(f, QEMU_VM_EOF); |
1251 |
|
1252 |
if (qemu_file_has_error(f))
|
1253 |
return -EIO;
|
1254 |
|
1255 |
return 0; |
1256 |
} |
1257 |
|
1258 |
int qemu_savevm_state(QEMUFile *f)
|
1259 |
{ |
1260 |
int saved_vm_running;
|
1261 |
int ret;
|
1262 |
|
1263 |
saved_vm_running = vm_running; |
1264 |
vm_stop(0);
|
1265 |
|
1266 |
bdrv_flush_all(); |
1267 |
|
1268 |
ret = qemu_savevm_state_begin(f); |
1269 |
if (ret < 0) |
1270 |
goto out;
|
1271 |
|
1272 |
do {
|
1273 |
ret = qemu_savevm_state_iterate(f); |
1274 |
if (ret < 0) |
1275 |
goto out;
|
1276 |
} while (ret == 0); |
1277 |
|
1278 |
ret = qemu_savevm_state_complete(f); |
1279 |
|
1280 |
out:
|
1281 |
if (qemu_file_has_error(f))
|
1282 |
ret = -EIO; |
1283 |
|
1284 |
if (!ret && saved_vm_running)
|
1285 |
vm_start(); |
1286 |
|
1287 |
return ret;
|
1288 |
} |
1289 |
|
1290 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1291 |
{ |
1292 |
SaveStateEntry *se; |
1293 |
|
1294 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1295 |
if (!strcmp(se->idstr, idstr) &&
|
1296 |
instance_id == se->instance_id) |
1297 |
return se;
|
1298 |
} |
1299 |
return NULL; |
1300 |
} |
1301 |
|
1302 |
typedef struct LoadStateEntry { |
1303 |
QLIST_ENTRY(LoadStateEntry) entry; |
1304 |
SaveStateEntry *se; |
1305 |
int section_id;
|
1306 |
int version_id;
|
1307 |
} LoadStateEntry; |
1308 |
|
1309 |
int qemu_loadvm_state(QEMUFile *f)
|
1310 |
{ |
1311 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1312 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1313 |
LoadStateEntry *le, *new_le; |
1314 |
uint8_t section_type; |
1315 |
unsigned int v; |
1316 |
int ret;
|
1317 |
|
1318 |
v = qemu_get_be32(f); |
1319 |
if (v != QEMU_VM_FILE_MAGIC)
|
1320 |
return -EINVAL;
|
1321 |
|
1322 |
v = qemu_get_be32(f); |
1323 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1324 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1325 |
return -ENOTSUP;
|
1326 |
} |
1327 |
if (v != QEMU_VM_FILE_VERSION)
|
1328 |
return -ENOTSUP;
|
1329 |
|
1330 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1331 |
uint32_t instance_id, version_id, section_id; |
1332 |
SaveStateEntry *se; |
1333 |
char idstr[257]; |
1334 |
int len;
|
1335 |
|
1336 |
switch (section_type) {
|
1337 |
case QEMU_VM_SECTION_START:
|
1338 |
case QEMU_VM_SECTION_FULL:
|
1339 |
/* Read section start */
|
1340 |
section_id = qemu_get_be32(f); |
1341 |
len = qemu_get_byte(f); |
1342 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1343 |
idstr[len] = 0;
|
1344 |
instance_id = qemu_get_be32(f); |
1345 |
version_id = qemu_get_be32(f); |
1346 |
|
1347 |
/* Find savevm section */
|
1348 |
se = find_se(idstr, instance_id); |
1349 |
if (se == NULL) { |
1350 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1351 |
ret = -EINVAL; |
1352 |
goto out;
|
1353 |
} |
1354 |
|
1355 |
/* Validate version */
|
1356 |
if (version_id > se->version_id) {
|
1357 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1358 |
version_id, idstr, se->version_id); |
1359 |
ret = -EINVAL; |
1360 |
goto out;
|
1361 |
} |
1362 |
|
1363 |
/* Add entry */
|
1364 |
le = qemu_mallocz(sizeof(*le));
|
1365 |
|
1366 |
le->se = se; |
1367 |
le->section_id = section_id; |
1368 |
le->version_id = version_id; |
1369 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1370 |
|
1371 |
ret = vmstate_load(f, le->se, le->version_id); |
1372 |
if (ret < 0) { |
1373 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1374 |
instance_id, idstr); |
1375 |
goto out;
|
1376 |
} |
1377 |
break;
|
1378 |
case QEMU_VM_SECTION_PART:
|
1379 |
case QEMU_VM_SECTION_END:
|
1380 |
section_id = qemu_get_be32(f); |
1381 |
|
1382 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1383 |
if (le->section_id == section_id) {
|
1384 |
break;
|
1385 |
} |
1386 |
} |
1387 |
if (le == NULL) { |
1388 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1389 |
ret = -EINVAL; |
1390 |
goto out;
|
1391 |
} |
1392 |
|
1393 |
ret = vmstate_load(f, le->se, le->version_id); |
1394 |
if (ret < 0) { |
1395 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1396 |
section_id); |
1397 |
goto out;
|
1398 |
} |
1399 |
break;
|
1400 |
default:
|
1401 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1402 |
ret = -EINVAL; |
1403 |
goto out;
|
1404 |
} |
1405 |
} |
1406 |
|
1407 |
ret = 0;
|
1408 |
|
1409 |
out:
|
1410 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1411 |
QLIST_REMOVE(le, entry); |
1412 |
qemu_free(le); |
1413 |
} |
1414 |
|
1415 |
if (qemu_file_has_error(f))
|
1416 |
ret = -EIO; |
1417 |
|
1418 |
return ret;
|
1419 |
} |
1420 |
|
1421 |
/* device can contain snapshots */
|
1422 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1423 |
{ |
1424 |
return (bs &&
|
1425 |
!bdrv_is_removable(bs) && |
1426 |
!bdrv_is_read_only(bs)); |
1427 |
} |
1428 |
|
1429 |
/* device must be snapshots in order to have a reliable snapshot */
|
1430 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1431 |
{ |
1432 |
return (bs &&
|
1433 |
!bdrv_is_removable(bs) && |
1434 |
!bdrv_is_read_only(bs)); |
1435 |
} |
1436 |
|
1437 |
static BlockDriverState *get_bs_snapshots(void) |
1438 |
{ |
1439 |
BlockDriverState *bs; |
1440 |
DriveInfo *dinfo; |
1441 |
|
1442 |
if (bs_snapshots)
|
1443 |
return bs_snapshots;
|
1444 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1445 |
bs = dinfo->bdrv; |
1446 |
if (bdrv_can_snapshot(bs))
|
1447 |
goto ok;
|
1448 |
} |
1449 |
return NULL; |
1450 |
ok:
|
1451 |
bs_snapshots = bs; |
1452 |
return bs;
|
1453 |
} |
1454 |
|
1455 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1456 |
const char *name) |
1457 |
{ |
1458 |
QEMUSnapshotInfo *sn_tab, *sn; |
1459 |
int nb_sns, i, ret;
|
1460 |
|
1461 |
ret = -ENOENT; |
1462 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1463 |
if (nb_sns < 0) |
1464 |
return ret;
|
1465 |
for(i = 0; i < nb_sns; i++) { |
1466 |
sn = &sn_tab[i]; |
1467 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1468 |
*sn_info = *sn; |
1469 |
ret = 0;
|
1470 |
break;
|
1471 |
} |
1472 |
} |
1473 |
qemu_free(sn_tab); |
1474 |
return ret;
|
1475 |
} |
1476 |
|
1477 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1478 |
{ |
1479 |
DriveInfo *dinfo; |
1480 |
BlockDriverState *bs, *bs1; |
1481 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1482 |
int must_delete, ret;
|
1483 |
QEMUFile *f; |
1484 |
int saved_vm_running;
|
1485 |
uint32_t vm_state_size; |
1486 |
#ifdef _WIN32
|
1487 |
struct _timeb tb;
|
1488 |
#else
|
1489 |
struct timeval tv;
|
1490 |
#endif
|
1491 |
const char *name = qdict_get_try_str(qdict, "name"); |
1492 |
|
1493 |
bs = get_bs_snapshots(); |
1494 |
if (!bs) {
|
1495 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1496 |
return;
|
1497 |
} |
1498 |
|
1499 |
/* ??? Should this occur after vm_stop? */
|
1500 |
qemu_aio_flush(); |
1501 |
|
1502 |
saved_vm_running = vm_running; |
1503 |
vm_stop(0);
|
1504 |
|
1505 |
must_delete = 0;
|
1506 |
if (name) {
|
1507 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1508 |
if (ret >= 0) { |
1509 |
must_delete = 1;
|
1510 |
} |
1511 |
} |
1512 |
memset(sn, 0, sizeof(*sn)); |
1513 |
if (must_delete) {
|
1514 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1515 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1516 |
} else {
|
1517 |
if (name)
|
1518 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1519 |
} |
1520 |
|
1521 |
/* fill auxiliary fields */
|
1522 |
#ifdef _WIN32
|
1523 |
_ftime(&tb); |
1524 |
sn->date_sec = tb.time; |
1525 |
sn->date_nsec = tb.millitm * 1000000;
|
1526 |
#else
|
1527 |
gettimeofday(&tv, NULL);
|
1528 |
sn->date_sec = tv.tv_sec; |
1529 |
sn->date_nsec = tv.tv_usec * 1000;
|
1530 |
#endif
|
1531 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1532 |
|
1533 |
/* save the VM state */
|
1534 |
f = qemu_fopen_bdrv(bs, 1);
|
1535 |
if (!f) {
|
1536 |
monitor_printf(mon, "Could not open VM state file\n");
|
1537 |
goto the_end;
|
1538 |
} |
1539 |
ret = qemu_savevm_state(f); |
1540 |
vm_state_size = qemu_ftell(f); |
1541 |
qemu_fclose(f); |
1542 |
if (ret < 0) { |
1543 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1544 |
goto the_end;
|
1545 |
} |
1546 |
|
1547 |
/* create the snapshots */
|
1548 |
|
1549 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1550 |
bs1 = dinfo->bdrv; |
1551 |
if (bdrv_has_snapshot(bs1)) {
|
1552 |
if (must_delete) {
|
1553 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1554 |
if (ret < 0) { |
1555 |
monitor_printf(mon, |
1556 |
"Error while deleting snapshot on '%s'\n",
|
1557 |
bdrv_get_device_name(bs1)); |
1558 |
} |
1559 |
} |
1560 |
/* Write VM state size only to the image that contains the state */
|
1561 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1562 |
ret = bdrv_snapshot_create(bs1, sn); |
1563 |
if (ret < 0) { |
1564 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1565 |
bdrv_get_device_name(bs1)); |
1566 |
} |
1567 |
} |
1568 |
} |
1569 |
|
1570 |
the_end:
|
1571 |
if (saved_vm_running)
|
1572 |
vm_start(); |
1573 |
} |
1574 |
|
1575 |
int load_vmstate(Monitor *mon, const char *name) |
1576 |
{ |
1577 |
DriveInfo *dinfo; |
1578 |
BlockDriverState *bs, *bs1; |
1579 |
QEMUSnapshotInfo sn; |
1580 |
QEMUFile *f; |
1581 |
int ret;
|
1582 |
|
1583 |
bs = get_bs_snapshots(); |
1584 |
if (!bs) {
|
1585 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1586 |
return -EINVAL;
|
1587 |
} |
1588 |
|
1589 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1590 |
qemu_aio_flush(); |
1591 |
|
1592 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1593 |
bs1 = dinfo->bdrv; |
1594 |
if (bdrv_has_snapshot(bs1)) {
|
1595 |
ret = bdrv_snapshot_goto(bs1, name); |
1596 |
if (ret < 0) { |
1597 |
if (bs != bs1)
|
1598 |
monitor_printf(mon, "Warning: ");
|
1599 |
switch(ret) {
|
1600 |
case -ENOTSUP:
|
1601 |
monitor_printf(mon, |
1602 |
"Snapshots not supported on device '%s'\n",
|
1603 |
bdrv_get_device_name(bs1)); |
1604 |
break;
|
1605 |
case -ENOENT:
|
1606 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1607 |
"device '%s'\n",
|
1608 |
name, bdrv_get_device_name(bs1)); |
1609 |
break;
|
1610 |
default:
|
1611 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1612 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1613 |
break;
|
1614 |
} |
1615 |
/* fatal on snapshot block device */
|
1616 |
if (bs == bs1)
|
1617 |
return 0; |
1618 |
} |
1619 |
} |
1620 |
} |
1621 |
|
1622 |
/* Don't even try to load empty VM states */
|
1623 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1624 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1625 |
return -EINVAL;
|
1626 |
|
1627 |
/* restore the VM state */
|
1628 |
f = qemu_fopen_bdrv(bs, 0);
|
1629 |
if (!f) {
|
1630 |
monitor_printf(mon, "Could not open VM state file\n");
|
1631 |
return -EINVAL;
|
1632 |
} |
1633 |
ret = qemu_loadvm_state(f); |
1634 |
qemu_fclose(f); |
1635 |
if (ret < 0) { |
1636 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1637 |
return ret;
|
1638 |
} |
1639 |
return 0; |
1640 |
} |
1641 |
|
1642 |
void do_delvm(Monitor *mon, const QDict *qdict) |
1643 |
{ |
1644 |
DriveInfo *dinfo; |
1645 |
BlockDriverState *bs, *bs1; |
1646 |
int ret;
|
1647 |
const char *name = qdict_get_str(qdict, "name"); |
1648 |
|
1649 |
bs = get_bs_snapshots(); |
1650 |
if (!bs) {
|
1651 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1652 |
return;
|
1653 |
} |
1654 |
|
1655 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1656 |
bs1 = dinfo->bdrv; |
1657 |
if (bdrv_has_snapshot(bs1)) {
|
1658 |
ret = bdrv_snapshot_delete(bs1, name); |
1659 |
if (ret < 0) { |
1660 |
if (ret == -ENOTSUP)
|
1661 |
monitor_printf(mon, |
1662 |
"Snapshots not supported on device '%s'\n",
|
1663 |
bdrv_get_device_name(bs1)); |
1664 |
else
|
1665 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1666 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1667 |
} |
1668 |
} |
1669 |
} |
1670 |
} |
1671 |
|
1672 |
void do_info_snapshots(Monitor *mon)
|
1673 |
{ |
1674 |
DriveInfo *dinfo; |
1675 |
BlockDriverState *bs, *bs1; |
1676 |
QEMUSnapshotInfo *sn_tab, *sn; |
1677 |
int nb_sns, i;
|
1678 |
char buf[256]; |
1679 |
|
1680 |
bs = get_bs_snapshots(); |
1681 |
if (!bs) {
|
1682 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1683 |
return;
|
1684 |
} |
1685 |
monitor_printf(mon, "Snapshot devices:");
|
1686 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1687 |
bs1 = dinfo->bdrv; |
1688 |
if (bdrv_has_snapshot(bs1)) {
|
1689 |
if (bs == bs1)
|
1690 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1691 |
} |
1692 |
} |
1693 |
monitor_printf(mon, "\n");
|
1694 |
|
1695 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1696 |
if (nb_sns < 0) { |
1697 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1698 |
return;
|
1699 |
} |
1700 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1701 |
bdrv_get_device_name(bs)); |
1702 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1703 |
for(i = 0; i < nb_sns; i++) { |
1704 |
sn = &sn_tab[i]; |
1705 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1706 |
} |
1707 |
qemu_free(sn_tab); |
1708 |
} |