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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 "config-host.h" |
26 |
#include "qemu-common.h" |
27 |
#include "hw/hw.h" |
28 |
#include "hw/qdev.h" |
29 |
#include "net/net.h" |
30 |
#include "monitor/monitor.h" |
31 |
#include "sysemu/sysemu.h" |
32 |
#include "qemu/timer.h" |
33 |
#include "audio/audio.h" |
34 |
#include "migration/migration.h" |
35 |
#include "qemu/sockets.h" |
36 |
#include "qemu/queue.h" |
37 |
#include "sysemu/cpus.h" |
38 |
#include "exec/memory.h" |
39 |
#include "qmp-commands.h" |
40 |
#include "trace.h" |
41 |
#include "qemu/bitops.h" |
42 |
|
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#define SELF_ANNOUNCE_ROUNDS 5 |
44 |
|
45 |
#ifndef ETH_P_RARP
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#define ETH_P_RARP 0x8035 |
47 |
#endif
|
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#define ARP_HTYPE_ETH 0x0001 |
49 |
#define ARP_PTYPE_IP 0x0800 |
50 |
#define ARP_OP_REQUEST_REV 0x3 |
51 |
|
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static int announce_self_create(uint8_t *buf, |
53 |
uint8_t *mac_addr) |
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{ |
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/* Ethernet header. */
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memset(buf, 0xff, 6); /* destination MAC addr */ |
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memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
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*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
59 |
|
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/* RARP header. */
|
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*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
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*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
63 |
*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
64 |
*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
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*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
66 |
memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
67 |
memset(buf + 28, 0x00, 4); /* source protocol addr */ |
68 |
memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
69 |
memset(buf + 38, 0x00, 4); /* target protocol addr */ |
70 |
|
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/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
|
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memset(buf + 42, 0x00, 18); |
73 |
|
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return 60; /* len (FCS will be added by hardware) */ |
75 |
} |
76 |
|
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static void qemu_announce_self_iter(NICState *nic, void *opaque) |
78 |
{ |
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uint8_t buf[60];
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int len;
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|
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len = announce_self_create(buf, nic->conf->macaddr.a); |
83 |
|
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qemu_send_packet_raw(qemu_get_queue(nic), buf, len); |
85 |
} |
86 |
|
87 |
|
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static void qemu_announce_self_once(void *opaque) |
89 |
{ |
90 |
static int count = SELF_ANNOUNCE_ROUNDS; |
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QEMUTimer *timer = *(QEMUTimer **)opaque; |
92 |
|
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qemu_foreach_nic(qemu_announce_self_iter, NULL);
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|
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if (--count) {
|
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/* delay 50ms, 150ms, 250ms, ... */
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qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
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50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
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} else {
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qemu_del_timer(timer); |
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qemu_free_timer(timer); |
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} |
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} |
104 |
|
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void qemu_announce_self(void) |
106 |
{ |
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static QEMUTimer *timer;
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timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
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qemu_announce_self_once(&timer); |
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} |
111 |
|
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/***********************************************************/
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/* savevm/loadvm support */
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|
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#define IO_BUF_SIZE 32768 |
116 |
|
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struct QEMUFile {
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const QEMUFileOps *ops;
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void *opaque;
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int is_write;
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|
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int64_t bytes_xfer; |
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int64_t xfer_limit; |
124 |
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int64_t pos; /* 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 */ |
129 |
uint8_t buf[IO_BUF_SIZE]; |
130 |
|
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int last_error;
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}; |
133 |
|
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typedef struct QEMUFileStdio |
135 |
{ |
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FILE *stdio_file; |
137 |
QEMUFile *file; |
138 |
} QEMUFileStdio; |
139 |
|
140 |
typedef struct QEMUFileSocket |
141 |
{ |
142 |
int fd;
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QEMUFile *file; |
144 |
} QEMUFileSocket; |
145 |
|
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typedef struct { |
147 |
Coroutine *co; |
148 |
int fd;
|
149 |
} FDYieldUntilData; |
150 |
|
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static void fd_coroutine_enter(void *opaque) |
152 |
{ |
153 |
FDYieldUntilData *data = opaque; |
154 |
qemu_set_fd_handler(data->fd, NULL, NULL, NULL); |
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qemu_coroutine_enter(data->co, NULL);
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} |
157 |
|
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/**
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* Yield until a file descriptor becomes readable
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*
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* Note that this function clobbers the handlers for the file descriptor.
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*/
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static void coroutine_fn yield_until_fd_readable(int fd) |
164 |
{ |
165 |
FDYieldUntilData data; |
166 |
|
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assert(qemu_in_coroutine()); |
168 |
data.co = qemu_coroutine_self(); |
169 |
data.fd = fd; |
170 |
qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
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qemu_coroutine_yield(); |
172 |
} |
173 |
|
174 |
static int socket_get_fd(void *opaque) |
175 |
{ |
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QEMUFileSocket *s = opaque; |
177 |
|
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return s->fd;
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} |
180 |
|
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static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
182 |
{ |
183 |
QEMUFileSocket *s = opaque; |
184 |
ssize_t len; |
185 |
|
186 |
for (;;) {
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len = qemu_recv(s->fd, buf, size, 0);
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188 |
if (len != -1) { |
189 |
break;
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190 |
} |
191 |
if (socket_error() == EAGAIN) {
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yield_until_fd_readable(s->fd); |
193 |
} else if (socket_error() != EINTR) { |
194 |
break;
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195 |
} |
196 |
} |
197 |
|
198 |
if (len == -1) { |
199 |
len = -socket_error(); |
200 |
} |
201 |
return len;
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} |
203 |
|
204 |
static int socket_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
205 |
{ |
206 |
QEMUFileSocket *s = opaque; |
207 |
ssize_t len; |
208 |
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len = qemu_send_full(s->fd, buf, size, 0);
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if (len < size) {
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len = -socket_error(); |
212 |
} |
213 |
return len;
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214 |
} |
215 |
|
216 |
static int socket_close(void *opaque) |
217 |
{ |
218 |
QEMUFileSocket *s = opaque; |
219 |
closesocket(s->fd); |
220 |
g_free(s); |
221 |
return 0; |
222 |
} |
223 |
|
224 |
static int stdio_get_fd(void *opaque) |
225 |
{ |
226 |
QEMUFileStdio *s = opaque; |
227 |
|
228 |
return fileno(s->stdio_file);
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} |
230 |
|
231 |
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
232 |
{ |
233 |
QEMUFileStdio *s = opaque; |
234 |
return fwrite(buf, 1, size, s->stdio_file); |
235 |
} |
236 |
|
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
238 |
{ |
239 |
QEMUFileStdio *s = opaque; |
240 |
FILE *fp = s->stdio_file; |
241 |
int bytes;
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242 |
|
243 |
for (;;) {
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clearerr(fp); |
245 |
bytes = fread(buf, 1, size, fp);
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246 |
if (bytes != 0 || !ferror(fp)) { |
247 |
break;
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248 |
} |
249 |
if (errno == EAGAIN) {
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250 |
yield_until_fd_readable(fileno(fp)); |
251 |
} else if (errno != EINTR) { |
252 |
break;
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253 |
} |
254 |
} |
255 |
return bytes;
|
256 |
} |
257 |
|
258 |
static int stdio_pclose(void *opaque) |
259 |
{ |
260 |
QEMUFileStdio *s = opaque; |
261 |
int ret;
|
262 |
ret = pclose(s->stdio_file); |
263 |
if (ret == -1) { |
264 |
ret = -errno; |
265 |
} else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) { |
266 |
/* close succeeded, but non-zero exit code: */
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ret = -EIO; /* fake errno value */
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268 |
} |
269 |
g_free(s); |
270 |
return ret;
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271 |
} |
272 |
|
273 |
static int stdio_fclose(void *opaque) |
274 |
{ |
275 |
QEMUFileStdio *s = opaque; |
276 |
int ret = 0; |
277 |
|
278 |
if (s->file->ops->put_buffer) {
|
279 |
int fd = fileno(s->stdio_file);
|
280 |
struct stat st;
|
281 |
|
282 |
ret = fstat(fd, &st); |
283 |
if (ret == 0 && S_ISREG(st.st_mode)) { |
284 |
/*
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285 |
* If the file handle is a regular file make sure the
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* data is flushed to disk before signaling success.
|
287 |
*/
|
288 |
ret = fsync(fd); |
289 |
if (ret != 0) { |
290 |
ret = -errno; |
291 |
return ret;
|
292 |
} |
293 |
} |
294 |
} |
295 |
if (fclose(s->stdio_file) == EOF) { |
296 |
ret = -errno; |
297 |
} |
298 |
g_free(s); |
299 |
return ret;
|
300 |
} |
301 |
|
302 |
static const QEMUFileOps stdio_pipe_read_ops = { |
303 |
.get_fd = stdio_get_fd, |
304 |
.get_buffer = stdio_get_buffer, |
305 |
.close = stdio_pclose |
306 |
}; |
307 |
|
308 |
static const QEMUFileOps stdio_pipe_write_ops = { |
309 |
.get_fd = stdio_get_fd, |
310 |
.put_buffer = stdio_put_buffer, |
311 |
.close = stdio_pclose |
312 |
}; |
313 |
|
314 |
QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
315 |
{ |
316 |
FILE *stdio_file; |
317 |
QEMUFileStdio *s; |
318 |
|
319 |
stdio_file = popen(command, mode); |
320 |
if (stdio_file == NULL) { |
321 |
return NULL; |
322 |
} |
323 |
|
324 |
if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
325 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
|
326 |
return NULL; |
327 |
} |
328 |
|
329 |
s = g_malloc0(sizeof(QEMUFileStdio));
|
330 |
|
331 |
s->stdio_file = stdio_file; |
332 |
|
333 |
if(mode[0] == 'r') { |
334 |
s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
335 |
} else {
|
336 |
s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
337 |
} |
338 |
return s->file;
|
339 |
} |
340 |
|
341 |
static const QEMUFileOps stdio_file_read_ops = { |
342 |
.get_fd = stdio_get_fd, |
343 |
.get_buffer = stdio_get_buffer, |
344 |
.close = stdio_fclose |
345 |
}; |
346 |
|
347 |
static const QEMUFileOps stdio_file_write_ops = { |
348 |
.get_fd = stdio_get_fd, |
349 |
.put_buffer = stdio_put_buffer, |
350 |
.close = stdio_fclose |
351 |
}; |
352 |
|
353 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
354 |
{ |
355 |
QEMUFileStdio *s; |
356 |
|
357 |
if (mode == NULL || |
358 |
(mode[0] != 'r' && mode[0] != 'w') || |
359 |
mode[1] != 'b' || mode[2] != 0) { |
360 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
361 |
return NULL; |
362 |
} |
363 |
|
364 |
s = g_malloc0(sizeof(QEMUFileStdio));
|
365 |
s->stdio_file = fdopen(fd, mode); |
366 |
if (!s->stdio_file)
|
367 |
goto fail;
|
368 |
|
369 |
if(mode[0] == 'r') { |
370 |
s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
371 |
} else {
|
372 |
s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
373 |
} |
374 |
return s->file;
|
375 |
|
376 |
fail:
|
377 |
g_free(s); |
378 |
return NULL; |
379 |
} |
380 |
|
381 |
static const QEMUFileOps socket_read_ops = { |
382 |
.get_fd = socket_get_fd, |
383 |
.get_buffer = socket_get_buffer, |
384 |
.close = socket_close |
385 |
}; |
386 |
|
387 |
static const QEMUFileOps socket_write_ops = { |
388 |
.get_fd = socket_get_fd, |
389 |
.put_buffer = socket_put_buffer, |
390 |
.close = socket_close |
391 |
}; |
392 |
|
393 |
QEMUFile *qemu_fopen_socket(int fd, const char *mode) |
394 |
{ |
395 |
QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
|
396 |
|
397 |
if (mode == NULL || |
398 |
(mode[0] != 'r' && mode[0] != 'w') || |
399 |
mode[1] != 'b' || mode[2] != 0) { |
400 |
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
|
401 |
return NULL; |
402 |
} |
403 |
|
404 |
s->fd = fd; |
405 |
if (mode[0] == 'w') { |
406 |
socket_set_block(s->fd); |
407 |
s->file = qemu_fopen_ops(s, &socket_write_ops); |
408 |
} else {
|
409 |
s->file = qemu_fopen_ops(s, &socket_read_ops); |
410 |
} |
411 |
return s->file;
|
412 |
} |
413 |
|
414 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
415 |
{ |
416 |
QEMUFileStdio *s; |
417 |
|
418 |
if (mode == NULL || |
419 |
(mode[0] != 'r' && mode[0] != 'w') || |
420 |
mode[1] != 'b' || mode[2] != 0) { |
421 |
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
|
422 |
return NULL; |
423 |
} |
424 |
|
425 |
s = g_malloc0(sizeof(QEMUFileStdio));
|
426 |
|
427 |
s->stdio_file = fopen(filename, mode); |
428 |
if (!s->stdio_file)
|
429 |
goto fail;
|
430 |
|
431 |
if(mode[0] == 'w') { |
432 |
s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
433 |
} else {
|
434 |
s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
435 |
} |
436 |
return s->file;
|
437 |
fail:
|
438 |
g_free(s); |
439 |
return NULL; |
440 |
} |
441 |
|
442 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
443 |
int64_t pos, int size)
|
444 |
{ |
445 |
bdrv_save_vmstate(opaque, buf, pos, size); |
446 |
return size;
|
447 |
} |
448 |
|
449 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
450 |
{ |
451 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
452 |
} |
453 |
|
454 |
static int bdrv_fclose(void *opaque) |
455 |
{ |
456 |
return bdrv_flush(opaque);
|
457 |
} |
458 |
|
459 |
static const QEMUFileOps bdrv_read_ops = { |
460 |
.get_buffer = block_get_buffer, |
461 |
.close = bdrv_fclose |
462 |
}; |
463 |
|
464 |
static const QEMUFileOps bdrv_write_ops = { |
465 |
.put_buffer = block_put_buffer, |
466 |
.close = bdrv_fclose |
467 |
}; |
468 |
|
469 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
470 |
{ |
471 |
if (is_writable)
|
472 |
return qemu_fopen_ops(bs, &bdrv_write_ops);
|
473 |
return qemu_fopen_ops(bs, &bdrv_read_ops);
|
474 |
} |
475 |
|
476 |
QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
477 |
{ |
478 |
QEMUFile *f; |
479 |
|
480 |
f = g_malloc0(sizeof(QEMUFile));
|
481 |
|
482 |
f->opaque = opaque; |
483 |
f->ops = ops; |
484 |
f->is_write = 0;
|
485 |
return f;
|
486 |
} |
487 |
|
488 |
int qemu_file_get_error(QEMUFile *f)
|
489 |
{ |
490 |
return f->last_error;
|
491 |
} |
492 |
|
493 |
static void qemu_file_set_error(QEMUFile *f, int ret) |
494 |
{ |
495 |
if (f->last_error == 0) { |
496 |
f->last_error = ret; |
497 |
} |
498 |
} |
499 |
|
500 |
/** Flushes QEMUFile buffer
|
501 |
*
|
502 |
*/
|
503 |
static void qemu_fflush(QEMUFile *f) |
504 |
{ |
505 |
int ret = 0; |
506 |
|
507 |
if (!f->ops->put_buffer) {
|
508 |
return;
|
509 |
} |
510 |
if (f->is_write && f->buf_index > 0) { |
511 |
ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index); |
512 |
if (ret >= 0) { |
513 |
f->pos += f->buf_index; |
514 |
} |
515 |
f->buf_index = 0;
|
516 |
} |
517 |
if (ret < 0) { |
518 |
qemu_file_set_error(f, ret); |
519 |
} |
520 |
} |
521 |
|
522 |
static void qemu_fill_buffer(QEMUFile *f) |
523 |
{ |
524 |
int len;
|
525 |
int pending;
|
526 |
|
527 |
if (!f->ops->get_buffer)
|
528 |
return;
|
529 |
|
530 |
if (f->is_write)
|
531 |
abort(); |
532 |
|
533 |
pending = f->buf_size - f->buf_index; |
534 |
if (pending > 0) { |
535 |
memmove(f->buf, f->buf + f->buf_index, pending); |
536 |
} |
537 |
f->buf_index = 0;
|
538 |
f->buf_size = pending; |
539 |
|
540 |
len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos, |
541 |
IO_BUF_SIZE - pending); |
542 |
if (len > 0) { |
543 |
f->buf_size += len; |
544 |
f->pos += len; |
545 |
} else if (len == 0) { |
546 |
qemu_file_set_error(f, -EIO); |
547 |
} else if (len != -EAGAIN) |
548 |
qemu_file_set_error(f, len); |
549 |
} |
550 |
|
551 |
int qemu_get_fd(QEMUFile *f)
|
552 |
{ |
553 |
if (f->ops->get_fd) {
|
554 |
return f->ops->get_fd(f->opaque);
|
555 |
} |
556 |
return -1; |
557 |
} |
558 |
|
559 |
/** Closes the file
|
560 |
*
|
561 |
* Returns negative error value if any error happened on previous operations or
|
562 |
* while closing the file. Returns 0 or positive number on success.
|
563 |
*
|
564 |
* The meaning of return value on success depends on the specific backend
|
565 |
* being used.
|
566 |
*/
|
567 |
int qemu_fclose(QEMUFile *f)
|
568 |
{ |
569 |
int ret;
|
570 |
qemu_fflush(f); |
571 |
ret = qemu_file_get_error(f); |
572 |
|
573 |
if (f->ops->close) {
|
574 |
int ret2 = f->ops->close(f->opaque);
|
575 |
if (ret >= 0) { |
576 |
ret = ret2; |
577 |
} |
578 |
} |
579 |
/* If any error was spotted before closing, we should report it
|
580 |
* instead of the close() return value.
|
581 |
*/
|
582 |
if (f->last_error) {
|
583 |
ret = f->last_error; |
584 |
} |
585 |
g_free(f); |
586 |
return ret;
|
587 |
} |
588 |
|
589 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
590 |
{ |
591 |
int l;
|
592 |
|
593 |
if (f->last_error) {
|
594 |
return;
|
595 |
} |
596 |
|
597 |
if (f->is_write == 0 && f->buf_index > 0) { |
598 |
fprintf(stderr, |
599 |
"Attempted to write to buffer while read buffer is not empty\n");
|
600 |
abort(); |
601 |
} |
602 |
|
603 |
while (size > 0) { |
604 |
l = IO_BUF_SIZE - f->buf_index; |
605 |
if (l > size)
|
606 |
l = size; |
607 |
memcpy(f->buf + f->buf_index, buf, l); |
608 |
f->is_write = 1;
|
609 |
f->buf_index += l; |
610 |
f->bytes_xfer += l; |
611 |
buf += l; |
612 |
size -= l; |
613 |
if (f->buf_index >= IO_BUF_SIZE) {
|
614 |
qemu_fflush(f); |
615 |
if (qemu_file_get_error(f)) {
|
616 |
break;
|
617 |
} |
618 |
} |
619 |
} |
620 |
} |
621 |
|
622 |
void qemu_put_byte(QEMUFile *f, int v) |
623 |
{ |
624 |
if (f->last_error) {
|
625 |
return;
|
626 |
} |
627 |
|
628 |
if (f->is_write == 0 && f->buf_index > 0) { |
629 |
fprintf(stderr, |
630 |
"Attempted to write to buffer while read buffer is not empty\n");
|
631 |
abort(); |
632 |
} |
633 |
|
634 |
f->buf[f->buf_index++] = v; |
635 |
f->is_write = 1;
|
636 |
if (f->buf_index >= IO_BUF_SIZE) {
|
637 |
qemu_fflush(f); |
638 |
} |
639 |
} |
640 |
|
641 |
static void qemu_file_skip(QEMUFile *f, int size) |
642 |
{ |
643 |
if (f->buf_index + size <= f->buf_size) {
|
644 |
f->buf_index += size; |
645 |
} |
646 |
} |
647 |
|
648 |
static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) |
649 |
{ |
650 |
int pending;
|
651 |
int index;
|
652 |
|
653 |
if (f->is_write) {
|
654 |
abort(); |
655 |
} |
656 |
|
657 |
index = f->buf_index + offset; |
658 |
pending = f->buf_size - index; |
659 |
if (pending < size) {
|
660 |
qemu_fill_buffer(f); |
661 |
index = f->buf_index + offset; |
662 |
pending = f->buf_size - index; |
663 |
} |
664 |
|
665 |
if (pending <= 0) { |
666 |
return 0; |
667 |
} |
668 |
if (size > pending) {
|
669 |
size = pending; |
670 |
} |
671 |
|
672 |
memcpy(buf, f->buf + index, size); |
673 |
return size;
|
674 |
} |
675 |
|
676 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) |
677 |
{ |
678 |
int pending = size;
|
679 |
int done = 0; |
680 |
|
681 |
while (pending > 0) { |
682 |
int res;
|
683 |
|
684 |
res = qemu_peek_buffer(f, buf, pending, 0);
|
685 |
if (res == 0) { |
686 |
return done;
|
687 |
} |
688 |
qemu_file_skip(f, res); |
689 |
buf += res; |
690 |
pending -= res; |
691 |
done += res; |
692 |
} |
693 |
return done;
|
694 |
} |
695 |
|
696 |
static int qemu_peek_byte(QEMUFile *f, int offset) |
697 |
{ |
698 |
int index = f->buf_index + offset;
|
699 |
|
700 |
if (f->is_write) {
|
701 |
abort(); |
702 |
} |
703 |
|
704 |
if (index >= f->buf_size) {
|
705 |
qemu_fill_buffer(f); |
706 |
index = f->buf_index + offset; |
707 |
if (index >= f->buf_size) {
|
708 |
return 0; |
709 |
} |
710 |
} |
711 |
return f->buf[index];
|
712 |
} |
713 |
|
714 |
int qemu_get_byte(QEMUFile *f)
|
715 |
{ |
716 |
int result;
|
717 |
|
718 |
result = qemu_peek_byte(f, 0);
|
719 |
qemu_file_skip(f, 1);
|
720 |
return result;
|
721 |
} |
722 |
|
723 |
int64_t qemu_ftell(QEMUFile *f) |
724 |
{ |
725 |
qemu_fflush(f); |
726 |
return f->pos;
|
727 |
} |
728 |
|
729 |
int qemu_file_rate_limit(QEMUFile *f)
|
730 |
{ |
731 |
if (qemu_file_get_error(f)) {
|
732 |
return 1; |
733 |
} |
734 |
if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) { |
735 |
return 1; |
736 |
} |
737 |
return 0; |
738 |
} |
739 |
|
740 |
int64_t qemu_file_get_rate_limit(QEMUFile *f) |
741 |
{ |
742 |
return f->xfer_limit;
|
743 |
} |
744 |
|
745 |
void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit)
|
746 |
{ |
747 |
f->xfer_limit = limit; |
748 |
} |
749 |
|
750 |
void qemu_file_reset_rate_limit(QEMUFile *f)
|
751 |
{ |
752 |
f->bytes_xfer = 0;
|
753 |
} |
754 |
|
755 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
756 |
{ |
757 |
qemu_put_byte(f, v >> 8);
|
758 |
qemu_put_byte(f, v); |
759 |
} |
760 |
|
761 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
762 |
{ |
763 |
qemu_put_byte(f, v >> 24);
|
764 |
qemu_put_byte(f, v >> 16);
|
765 |
qemu_put_byte(f, v >> 8);
|
766 |
qemu_put_byte(f, v); |
767 |
} |
768 |
|
769 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
770 |
{ |
771 |
qemu_put_be32(f, v >> 32);
|
772 |
qemu_put_be32(f, v); |
773 |
} |
774 |
|
775 |
unsigned int qemu_get_be16(QEMUFile *f) |
776 |
{ |
777 |
unsigned int v; |
778 |
v = qemu_get_byte(f) << 8;
|
779 |
v |= qemu_get_byte(f); |
780 |
return v;
|
781 |
} |
782 |
|
783 |
unsigned int qemu_get_be32(QEMUFile *f) |
784 |
{ |
785 |
unsigned int v; |
786 |
v = qemu_get_byte(f) << 24;
|
787 |
v |= qemu_get_byte(f) << 16;
|
788 |
v |= qemu_get_byte(f) << 8;
|
789 |
v |= qemu_get_byte(f); |
790 |
return v;
|
791 |
} |
792 |
|
793 |
uint64_t qemu_get_be64(QEMUFile *f) |
794 |
{ |
795 |
uint64_t v; |
796 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
797 |
v |= qemu_get_be32(f); |
798 |
return v;
|
799 |
} |
800 |
|
801 |
|
802 |
/* timer */
|
803 |
|
804 |
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
805 |
{ |
806 |
uint64_t expire_time; |
807 |
|
808 |
expire_time = qemu_timer_expire_time_ns(ts); |
809 |
qemu_put_be64(f, expire_time); |
810 |
} |
811 |
|
812 |
void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
813 |
{ |
814 |
uint64_t expire_time; |
815 |
|
816 |
expire_time = qemu_get_be64(f); |
817 |
if (expire_time != -1) { |
818 |
qemu_mod_timer_ns(ts, expire_time); |
819 |
} else {
|
820 |
qemu_del_timer(ts); |
821 |
} |
822 |
} |
823 |
|
824 |
|
825 |
/* bool */
|
826 |
|
827 |
static int get_bool(QEMUFile *f, void *pv, size_t size) |
828 |
{ |
829 |
bool *v = pv;
|
830 |
*v = qemu_get_byte(f); |
831 |
return 0; |
832 |
} |
833 |
|
834 |
static void put_bool(QEMUFile *f, void *pv, size_t size) |
835 |
{ |
836 |
bool *v = pv;
|
837 |
qemu_put_byte(f, *v); |
838 |
} |
839 |
|
840 |
const VMStateInfo vmstate_info_bool = {
|
841 |
.name = "bool",
|
842 |
.get = get_bool, |
843 |
.put = put_bool, |
844 |
}; |
845 |
|
846 |
/* 8 bit int */
|
847 |
|
848 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
849 |
{ |
850 |
int8_t *v = pv; |
851 |
qemu_get_s8s(f, v); |
852 |
return 0; |
853 |
} |
854 |
|
855 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
856 |
{ |
857 |
int8_t *v = pv; |
858 |
qemu_put_s8s(f, v); |
859 |
} |
860 |
|
861 |
const VMStateInfo vmstate_info_int8 = {
|
862 |
.name = "int8",
|
863 |
.get = get_int8, |
864 |
.put = put_int8, |
865 |
}; |
866 |
|
867 |
/* 16 bit int */
|
868 |
|
869 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
870 |
{ |
871 |
int16_t *v = pv; |
872 |
qemu_get_sbe16s(f, v); |
873 |
return 0; |
874 |
} |
875 |
|
876 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
877 |
{ |
878 |
int16_t *v = pv; |
879 |
qemu_put_sbe16s(f, v); |
880 |
} |
881 |
|
882 |
const VMStateInfo vmstate_info_int16 = {
|
883 |
.name = "int16",
|
884 |
.get = get_int16, |
885 |
.put = put_int16, |
886 |
}; |
887 |
|
888 |
/* 32 bit int */
|
889 |
|
890 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
891 |
{ |
892 |
int32_t *v = pv; |
893 |
qemu_get_sbe32s(f, v); |
894 |
return 0; |
895 |
} |
896 |
|
897 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
898 |
{ |
899 |
int32_t *v = pv; |
900 |
qemu_put_sbe32s(f, v); |
901 |
} |
902 |
|
903 |
const VMStateInfo vmstate_info_int32 = {
|
904 |
.name = "int32",
|
905 |
.get = get_int32, |
906 |
.put = put_int32, |
907 |
}; |
908 |
|
909 |
/* 32 bit int. See that the received value is the same than the one
|
910 |
in the field */
|
911 |
|
912 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
913 |
{ |
914 |
int32_t *v = pv; |
915 |
int32_t v2; |
916 |
qemu_get_sbe32s(f, &v2); |
917 |
|
918 |
if (*v == v2)
|
919 |
return 0; |
920 |
return -EINVAL;
|
921 |
} |
922 |
|
923 |
const VMStateInfo vmstate_info_int32_equal = {
|
924 |
.name = "int32 equal",
|
925 |
.get = get_int32_equal, |
926 |
.put = put_int32, |
927 |
}; |
928 |
|
929 |
/* 32 bit int. See that the received value is the less or the same
|
930 |
than the one in the field */
|
931 |
|
932 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
933 |
{ |
934 |
int32_t *old = pv; |
935 |
int32_t new; |
936 |
qemu_get_sbe32s(f, &new); |
937 |
|
938 |
if (*old <= new)
|
939 |
return 0; |
940 |
return -EINVAL;
|
941 |
} |
942 |
|
943 |
const VMStateInfo vmstate_info_int32_le = {
|
944 |
.name = "int32 equal",
|
945 |
.get = get_int32_le, |
946 |
.put = put_int32, |
947 |
}; |
948 |
|
949 |
/* 64 bit int */
|
950 |
|
951 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
952 |
{ |
953 |
int64_t *v = pv; |
954 |
qemu_get_sbe64s(f, v); |
955 |
return 0; |
956 |
} |
957 |
|
958 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
959 |
{ |
960 |
int64_t *v = pv; |
961 |
qemu_put_sbe64s(f, v); |
962 |
} |
963 |
|
964 |
const VMStateInfo vmstate_info_int64 = {
|
965 |
.name = "int64",
|
966 |
.get = get_int64, |
967 |
.put = put_int64, |
968 |
}; |
969 |
|
970 |
/* 8 bit unsigned int */
|
971 |
|
972 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
973 |
{ |
974 |
uint8_t *v = pv; |
975 |
qemu_get_8s(f, v); |
976 |
return 0; |
977 |
} |
978 |
|
979 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
980 |
{ |
981 |
uint8_t *v = pv; |
982 |
qemu_put_8s(f, v); |
983 |
} |
984 |
|
985 |
const VMStateInfo vmstate_info_uint8 = {
|
986 |
.name = "uint8",
|
987 |
.get = get_uint8, |
988 |
.put = put_uint8, |
989 |
}; |
990 |
|
991 |
/* 16 bit unsigned int */
|
992 |
|
993 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
994 |
{ |
995 |
uint16_t *v = pv; |
996 |
qemu_get_be16s(f, v); |
997 |
return 0; |
998 |
} |
999 |
|
1000 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
1001 |
{ |
1002 |
uint16_t *v = pv; |
1003 |
qemu_put_be16s(f, v); |
1004 |
} |
1005 |
|
1006 |
const VMStateInfo vmstate_info_uint16 = {
|
1007 |
.name = "uint16",
|
1008 |
.get = get_uint16, |
1009 |
.put = put_uint16, |
1010 |
}; |
1011 |
|
1012 |
/* 32 bit unsigned int */
|
1013 |
|
1014 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
1015 |
{ |
1016 |
uint32_t *v = pv; |
1017 |
qemu_get_be32s(f, v); |
1018 |
return 0; |
1019 |
} |
1020 |
|
1021 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
1022 |
{ |
1023 |
uint32_t *v = pv; |
1024 |
qemu_put_be32s(f, v); |
1025 |
} |
1026 |
|
1027 |
const VMStateInfo vmstate_info_uint32 = {
|
1028 |
.name = "uint32",
|
1029 |
.get = get_uint32, |
1030 |
.put = put_uint32, |
1031 |
}; |
1032 |
|
1033 |
/* 32 bit uint. See that the received value is the same than the one
|
1034 |
in the field */
|
1035 |
|
1036 |
static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
1037 |
{ |
1038 |
uint32_t *v = pv; |
1039 |
uint32_t v2; |
1040 |
qemu_get_be32s(f, &v2); |
1041 |
|
1042 |
if (*v == v2) {
|
1043 |
return 0; |
1044 |
} |
1045 |
return -EINVAL;
|
1046 |
} |
1047 |
|
1048 |
const VMStateInfo vmstate_info_uint32_equal = {
|
1049 |
.name = "uint32 equal",
|
1050 |
.get = get_uint32_equal, |
1051 |
.put = put_uint32, |
1052 |
}; |
1053 |
|
1054 |
/* 64 bit unsigned int */
|
1055 |
|
1056 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
1057 |
{ |
1058 |
uint64_t *v = pv; |
1059 |
qemu_get_be64s(f, v); |
1060 |
return 0; |
1061 |
} |
1062 |
|
1063 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
1064 |
{ |
1065 |
uint64_t *v = pv; |
1066 |
qemu_put_be64s(f, v); |
1067 |
} |
1068 |
|
1069 |
const VMStateInfo vmstate_info_uint64 = {
|
1070 |
.name = "uint64",
|
1071 |
.get = get_uint64, |
1072 |
.put = put_uint64, |
1073 |
}; |
1074 |
|
1075 |
/* 8 bit int. See that the received value is the same than the one
|
1076 |
in the field */
|
1077 |
|
1078 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
1079 |
{ |
1080 |
uint8_t *v = pv; |
1081 |
uint8_t v2; |
1082 |
qemu_get_8s(f, &v2); |
1083 |
|
1084 |
if (*v == v2)
|
1085 |
return 0; |
1086 |
return -EINVAL;
|
1087 |
} |
1088 |
|
1089 |
const VMStateInfo vmstate_info_uint8_equal = {
|
1090 |
.name = "uint8 equal",
|
1091 |
.get = get_uint8_equal, |
1092 |
.put = put_uint8, |
1093 |
}; |
1094 |
|
1095 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
1096 |
in the field */
|
1097 |
|
1098 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
1099 |
{ |
1100 |
uint16_t *v = pv; |
1101 |
uint16_t v2; |
1102 |
qemu_get_be16s(f, &v2); |
1103 |
|
1104 |
if (*v == v2)
|
1105 |
return 0; |
1106 |
return -EINVAL;
|
1107 |
} |
1108 |
|
1109 |
const VMStateInfo vmstate_info_uint16_equal = {
|
1110 |
.name = "uint16 equal",
|
1111 |
.get = get_uint16_equal, |
1112 |
.put = put_uint16, |
1113 |
}; |
1114 |
|
1115 |
/* timers */
|
1116 |
|
1117 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
1118 |
{ |
1119 |
QEMUTimer *v = pv; |
1120 |
qemu_get_timer(f, v); |
1121 |
return 0; |
1122 |
} |
1123 |
|
1124 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
1125 |
{ |
1126 |
QEMUTimer *v = pv; |
1127 |
qemu_put_timer(f, v); |
1128 |
} |
1129 |
|
1130 |
const VMStateInfo vmstate_info_timer = {
|
1131 |
.name = "timer",
|
1132 |
.get = get_timer, |
1133 |
.put = put_timer, |
1134 |
}; |
1135 |
|
1136 |
/* uint8_t buffers */
|
1137 |
|
1138 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
1139 |
{ |
1140 |
uint8_t *v = pv; |
1141 |
qemu_get_buffer(f, v, size); |
1142 |
return 0; |
1143 |
} |
1144 |
|
1145 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
1146 |
{ |
1147 |
uint8_t *v = pv; |
1148 |
qemu_put_buffer(f, v, size); |
1149 |
} |
1150 |
|
1151 |
const VMStateInfo vmstate_info_buffer = {
|
1152 |
.name = "buffer",
|
1153 |
.get = get_buffer, |
1154 |
.put = put_buffer, |
1155 |
}; |
1156 |
|
1157 |
/* unused buffers: space that was used for some fields that are
|
1158 |
not useful anymore */
|
1159 |
|
1160 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1161 |
{ |
1162 |
uint8_t buf[1024];
|
1163 |
int block_len;
|
1164 |
|
1165 |
while (size > 0) { |
1166 |
block_len = MIN(sizeof(buf), size);
|
1167 |
size -= block_len; |
1168 |
qemu_get_buffer(f, buf, block_len); |
1169 |
} |
1170 |
return 0; |
1171 |
} |
1172 |
|
1173 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1174 |
{ |
1175 |
static const uint8_t buf[1024]; |
1176 |
int block_len;
|
1177 |
|
1178 |
while (size > 0) { |
1179 |
block_len = MIN(sizeof(buf), size);
|
1180 |
size -= block_len; |
1181 |
qemu_put_buffer(f, buf, block_len); |
1182 |
} |
1183 |
} |
1184 |
|
1185 |
const VMStateInfo vmstate_info_unused_buffer = {
|
1186 |
.name = "unused_buffer",
|
1187 |
.get = get_unused_buffer, |
1188 |
.put = put_unused_buffer, |
1189 |
}; |
1190 |
|
1191 |
/* bitmaps (as defined by bitmap.h). Note that size here is the size
|
1192 |
* of the bitmap in bits. The on-the-wire format of a bitmap is 64
|
1193 |
* bit words with the bits in big endian order. The in-memory format
|
1194 |
* is an array of 'unsigned long', which may be either 32 or 64 bits.
|
1195 |
*/
|
1196 |
/* This is the number of 64 bit words sent over the wire */
|
1197 |
#define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) |
1198 |
static int get_bitmap(QEMUFile *f, void *pv, size_t size) |
1199 |
{ |
1200 |
unsigned long *bmp = pv; |
1201 |
int i, idx = 0; |
1202 |
for (i = 0; i < BITS_TO_U64S(size); i++) { |
1203 |
uint64_t w = qemu_get_be64(f); |
1204 |
bmp[idx++] = w; |
1205 |
if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
1206 |
bmp[idx++] = w >> 32;
|
1207 |
} |
1208 |
} |
1209 |
return 0; |
1210 |
} |
1211 |
|
1212 |
static void put_bitmap(QEMUFile *f, void *pv, size_t size) |
1213 |
{ |
1214 |
unsigned long *bmp = pv; |
1215 |
int i, idx = 0; |
1216 |
for (i = 0; i < BITS_TO_U64S(size); i++) { |
1217 |
uint64_t w = bmp[idx++]; |
1218 |
if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
1219 |
w |= ((uint64_t)bmp[idx++]) << 32;
|
1220 |
} |
1221 |
qemu_put_be64(f, w); |
1222 |
} |
1223 |
} |
1224 |
|
1225 |
const VMStateInfo vmstate_info_bitmap = {
|
1226 |
.name = "bitmap",
|
1227 |
.get = get_bitmap, |
1228 |
.put = put_bitmap, |
1229 |
}; |
1230 |
|
1231 |
typedef struct CompatEntry { |
1232 |
char idstr[256]; |
1233 |
int instance_id;
|
1234 |
} CompatEntry; |
1235 |
|
1236 |
typedef struct SaveStateEntry { |
1237 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
1238 |
char idstr[256]; |
1239 |
int instance_id;
|
1240 |
int alias_id;
|
1241 |
int version_id;
|
1242 |
int section_id;
|
1243 |
SaveVMHandlers *ops; |
1244 |
const VMStateDescription *vmsd;
|
1245 |
void *opaque;
|
1246 |
CompatEntry *compat; |
1247 |
int no_migrate;
|
1248 |
int is_ram;
|
1249 |
} SaveStateEntry; |
1250 |
|
1251 |
|
1252 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
1253 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
1254 |
static int global_section_id; |
1255 |
|
1256 |
static int calculate_new_instance_id(const char *idstr) |
1257 |
{ |
1258 |
SaveStateEntry *se; |
1259 |
int instance_id = 0; |
1260 |
|
1261 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1262 |
if (strcmp(idstr, se->idstr) == 0 |
1263 |
&& instance_id <= se->instance_id) { |
1264 |
instance_id = se->instance_id + 1;
|
1265 |
} |
1266 |
} |
1267 |
return instance_id;
|
1268 |
} |
1269 |
|
1270 |
static int calculate_compat_instance_id(const char *idstr) |
1271 |
{ |
1272 |
SaveStateEntry *se; |
1273 |
int instance_id = 0; |
1274 |
|
1275 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1276 |
if (!se->compat)
|
1277 |
continue;
|
1278 |
|
1279 |
if (strcmp(idstr, se->compat->idstr) == 0 |
1280 |
&& instance_id <= se->compat->instance_id) { |
1281 |
instance_id = se->compat->instance_id + 1;
|
1282 |
} |
1283 |
} |
1284 |
return instance_id;
|
1285 |
} |
1286 |
|
1287 |
/* TODO: Individual devices generally have very little idea about the rest
|
1288 |
of the system, so instance_id should be removed/replaced.
|
1289 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
1290 |
distinguishing id for all instances of your device class. */
|
1291 |
int register_savevm_live(DeviceState *dev,
|
1292 |
const char *idstr, |
1293 |
int instance_id,
|
1294 |
int version_id,
|
1295 |
SaveVMHandlers *ops, |
1296 |
void *opaque)
|
1297 |
{ |
1298 |
SaveStateEntry *se; |
1299 |
|
1300 |
se = g_malloc0(sizeof(SaveStateEntry));
|
1301 |
se->version_id = version_id; |
1302 |
se->section_id = global_section_id++; |
1303 |
se->ops = ops; |
1304 |
se->opaque = opaque; |
1305 |
se->vmsd = NULL;
|
1306 |
se->no_migrate = 0;
|
1307 |
/* if this is a live_savem then set is_ram */
|
1308 |
if (ops->save_live_setup != NULL) { |
1309 |
se->is_ram = 1;
|
1310 |
} |
1311 |
|
1312 |
if (dev) {
|
1313 |
char *id = qdev_get_dev_path(dev);
|
1314 |
if (id) {
|
1315 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1316 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1317 |
g_free(id); |
1318 |
|
1319 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
1320 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
1321 |
se->compat->instance_id = instance_id == -1 ?
|
1322 |
calculate_compat_instance_id(idstr) : instance_id; |
1323 |
instance_id = -1;
|
1324 |
} |
1325 |
} |
1326 |
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
1327 |
|
1328 |
if (instance_id == -1) { |
1329 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1330 |
} else {
|
1331 |
se->instance_id = instance_id; |
1332 |
} |
1333 |
assert(!se->compat || se->instance_id == 0);
|
1334 |
/* add at the end of list */
|
1335 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1336 |
return 0; |
1337 |
} |
1338 |
|
1339 |
int register_savevm(DeviceState *dev,
|
1340 |
const char *idstr, |
1341 |
int instance_id,
|
1342 |
int version_id,
|
1343 |
SaveStateHandler *save_state, |
1344 |
LoadStateHandler *load_state, |
1345 |
void *opaque)
|
1346 |
{ |
1347 |
SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
|
1348 |
ops->save_state = save_state; |
1349 |
ops->load_state = load_state; |
1350 |
return register_savevm_live(dev, idstr, instance_id, version_id,
|
1351 |
ops, opaque); |
1352 |
} |
1353 |
|
1354 |
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
1355 |
{ |
1356 |
SaveStateEntry *se, *new_se; |
1357 |
char id[256] = ""; |
1358 |
|
1359 |
if (dev) {
|
1360 |
char *path = qdev_get_dev_path(dev);
|
1361 |
if (path) {
|
1362 |
pstrcpy(id, sizeof(id), path);
|
1363 |
pstrcat(id, sizeof(id), "/"); |
1364 |
g_free(path); |
1365 |
} |
1366 |
} |
1367 |
pstrcat(id, sizeof(id), idstr);
|
1368 |
|
1369 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1370 |
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
1371 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1372 |
if (se->compat) {
|
1373 |
g_free(se->compat); |
1374 |
} |
1375 |
g_free(se->ops); |
1376 |
g_free(se); |
1377 |
} |
1378 |
} |
1379 |
} |
1380 |
|
1381 |
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
1382 |
const VMStateDescription *vmsd,
|
1383 |
void *opaque, int alias_id, |
1384 |
int required_for_version)
|
1385 |
{ |
1386 |
SaveStateEntry *se; |
1387 |
|
1388 |
/* If this triggers, alias support can be dropped for the vmsd. */
|
1389 |
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
1390 |
|
1391 |
se = g_malloc0(sizeof(SaveStateEntry));
|
1392 |
se->version_id = vmsd->version_id; |
1393 |
se->section_id = global_section_id++; |
1394 |
se->opaque = opaque; |
1395 |
se->vmsd = vmsd; |
1396 |
se->alias_id = alias_id; |
1397 |
se->no_migrate = vmsd->unmigratable; |
1398 |
|
1399 |
if (dev) {
|
1400 |
char *id = qdev_get_dev_path(dev);
|
1401 |
if (id) {
|
1402 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1403 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1404 |
g_free(id); |
1405 |
|
1406 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
1407 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
1408 |
se->compat->instance_id = instance_id == -1 ?
|
1409 |
calculate_compat_instance_id(vmsd->name) : instance_id; |
1410 |
instance_id = -1;
|
1411 |
} |
1412 |
} |
1413 |
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
1414 |
|
1415 |
if (instance_id == -1) { |
1416 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1417 |
} else {
|
1418 |
se->instance_id = instance_id; |
1419 |
} |
1420 |
assert(!se->compat || se->instance_id == 0);
|
1421 |
/* add at the end of list */
|
1422 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1423 |
return 0; |
1424 |
} |
1425 |
|
1426 |
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1427 |
void *opaque)
|
1428 |
{ |
1429 |
SaveStateEntry *se, *new_se; |
1430 |
|
1431 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1432 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1433 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1434 |
if (se->compat) {
|
1435 |
g_free(se->compat); |
1436 |
} |
1437 |
g_free(se); |
1438 |
} |
1439 |
} |
1440 |
} |
1441 |
|
1442 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1443 |
void *opaque);
|
1444 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1445 |
void *opaque);
|
1446 |
|
1447 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1448 |
void *opaque, int version_id) |
1449 |
{ |
1450 |
VMStateField *field = vmsd->fields; |
1451 |
int ret;
|
1452 |
|
1453 |
if (version_id > vmsd->version_id) {
|
1454 |
return -EINVAL;
|
1455 |
} |
1456 |
if (version_id < vmsd->minimum_version_id_old) {
|
1457 |
return -EINVAL;
|
1458 |
} |
1459 |
if (version_id < vmsd->minimum_version_id) {
|
1460 |
return vmsd->load_state_old(f, opaque, version_id);
|
1461 |
} |
1462 |
if (vmsd->pre_load) {
|
1463 |
int ret = vmsd->pre_load(opaque);
|
1464 |
if (ret)
|
1465 |
return ret;
|
1466 |
} |
1467 |
while(field->name) {
|
1468 |
if ((field->field_exists &&
|
1469 |
field->field_exists(opaque, version_id)) || |
1470 |
(!field->field_exists && |
1471 |
field->version_id <= version_id)) { |
1472 |
void *base_addr = opaque + field->offset;
|
1473 |
int i, n_elems = 1; |
1474 |
int size = field->size;
|
1475 |
|
1476 |
if (field->flags & VMS_VBUFFER) {
|
1477 |
size = *(int32_t *)(opaque+field->size_offset); |
1478 |
if (field->flags & VMS_MULTIPLY) {
|
1479 |
size *= field->size; |
1480 |
} |
1481 |
} |
1482 |
if (field->flags & VMS_ARRAY) {
|
1483 |
n_elems = field->num; |
1484 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1485 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1486 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
1487 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
1488 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1489 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1490 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
1491 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
1492 |
} |
1493 |
if (field->flags & VMS_POINTER) {
|
1494 |
base_addr = *(void **)base_addr + field->start;
|
1495 |
} |
1496 |
for (i = 0; i < n_elems; i++) { |
1497 |
void *addr = base_addr + size * i;
|
1498 |
|
1499 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1500 |
addr = *(void **)addr;
|
1501 |
} |
1502 |
if (field->flags & VMS_STRUCT) {
|
1503 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1504 |
} else {
|
1505 |
ret = field->info->get(f, addr, size); |
1506 |
|
1507 |
} |
1508 |
if (ret < 0) { |
1509 |
return ret;
|
1510 |
} |
1511 |
} |
1512 |
} |
1513 |
field++; |
1514 |
} |
1515 |
ret = vmstate_subsection_load(f, vmsd, opaque); |
1516 |
if (ret != 0) { |
1517 |
return ret;
|
1518 |
} |
1519 |
if (vmsd->post_load) {
|
1520 |
return vmsd->post_load(opaque, version_id);
|
1521 |
} |
1522 |
return 0; |
1523 |
} |
1524 |
|
1525 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1526 |
void *opaque)
|
1527 |
{ |
1528 |
VMStateField *field = vmsd->fields; |
1529 |
|
1530 |
if (vmsd->pre_save) {
|
1531 |
vmsd->pre_save(opaque); |
1532 |
} |
1533 |
while(field->name) {
|
1534 |
if (!field->field_exists ||
|
1535 |
field->field_exists(opaque, vmsd->version_id)) { |
1536 |
void *base_addr = opaque + field->offset;
|
1537 |
int i, n_elems = 1; |
1538 |
int size = field->size;
|
1539 |
|
1540 |
if (field->flags & VMS_VBUFFER) {
|
1541 |
size = *(int32_t *)(opaque+field->size_offset); |
1542 |
if (field->flags & VMS_MULTIPLY) {
|
1543 |
size *= field->size; |
1544 |
} |
1545 |
} |
1546 |
if (field->flags & VMS_ARRAY) {
|
1547 |
n_elems = field->num; |
1548 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1549 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1550 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
1551 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
1552 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1553 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1554 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
1555 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
1556 |
} |
1557 |
if (field->flags & VMS_POINTER) {
|
1558 |
base_addr = *(void **)base_addr + field->start;
|
1559 |
} |
1560 |
for (i = 0; i < n_elems; i++) { |
1561 |
void *addr = base_addr + size * i;
|
1562 |
|
1563 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1564 |
addr = *(void **)addr;
|
1565 |
} |
1566 |
if (field->flags & VMS_STRUCT) {
|
1567 |
vmstate_save_state(f, field->vmsd, addr); |
1568 |
} else {
|
1569 |
field->info->put(f, addr, size); |
1570 |
} |
1571 |
} |
1572 |
} |
1573 |
field++; |
1574 |
} |
1575 |
vmstate_subsection_save(f, vmsd, opaque); |
1576 |
} |
1577 |
|
1578 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1579 |
{ |
1580 |
if (!se->vmsd) { /* Old style */ |
1581 |
return se->ops->load_state(f, se->opaque, version_id);
|
1582 |
} |
1583 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1584 |
} |
1585 |
|
1586 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1587 |
{ |
1588 |
if (!se->vmsd) { /* Old style */ |
1589 |
se->ops->save_state(f, se->opaque); |
1590 |
return;
|
1591 |
} |
1592 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1593 |
} |
1594 |
|
1595 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1596 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1597 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1598 |
|
1599 |
#define QEMU_VM_EOF 0x00 |
1600 |
#define QEMU_VM_SECTION_START 0x01 |
1601 |
#define QEMU_VM_SECTION_PART 0x02 |
1602 |
#define QEMU_VM_SECTION_END 0x03 |
1603 |
#define QEMU_VM_SECTION_FULL 0x04 |
1604 |
#define QEMU_VM_SUBSECTION 0x05 |
1605 |
|
1606 |
bool qemu_savevm_state_blocked(Error **errp)
|
1607 |
{ |
1608 |
SaveStateEntry *se; |
1609 |
|
1610 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1611 |
if (se->no_migrate) {
|
1612 |
error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
1613 |
return true; |
1614 |
} |
1615 |
} |
1616 |
return false; |
1617 |
} |
1618 |
|
1619 |
void qemu_savevm_state_begin(QEMUFile *f,
|
1620 |
const MigrationParams *params)
|
1621 |
{ |
1622 |
SaveStateEntry *se; |
1623 |
int ret;
|
1624 |
|
1625 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1626 |
if (!se->ops || !se->ops->set_params) {
|
1627 |
continue;
|
1628 |
} |
1629 |
se->ops->set_params(params, se->opaque); |
1630 |
} |
1631 |
|
1632 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1633 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1634 |
|
1635 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1636 |
int len;
|
1637 |
|
1638 |
if (!se->ops || !se->ops->save_live_setup) {
|
1639 |
continue;
|
1640 |
} |
1641 |
if (se->ops && se->ops->is_active) {
|
1642 |
if (!se->ops->is_active(se->opaque)) {
|
1643 |
continue;
|
1644 |
} |
1645 |
} |
1646 |
/* Section type */
|
1647 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1648 |
qemu_put_be32(f, se->section_id); |
1649 |
|
1650 |
/* ID string */
|
1651 |
len = strlen(se->idstr); |
1652 |
qemu_put_byte(f, len); |
1653 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1654 |
|
1655 |
qemu_put_be32(f, se->instance_id); |
1656 |
qemu_put_be32(f, se->version_id); |
1657 |
|
1658 |
ret = se->ops->save_live_setup(f, se->opaque); |
1659 |
if (ret < 0) { |
1660 |
qemu_file_set_error(f, ret); |
1661 |
break;
|
1662 |
} |
1663 |
} |
1664 |
} |
1665 |
|
1666 |
/*
|
1667 |
* this function has three return values:
|
1668 |
* negative: there was one error, and we have -errno.
|
1669 |
* 0 : We haven't finished, caller have to go again
|
1670 |
* 1 : We have finished, we can go to complete phase
|
1671 |
*/
|
1672 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1673 |
{ |
1674 |
SaveStateEntry *se; |
1675 |
int ret = 1; |
1676 |
|
1677 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1678 |
if (!se->ops || !se->ops->save_live_iterate) {
|
1679 |
continue;
|
1680 |
} |
1681 |
if (se->ops && se->ops->is_active) {
|
1682 |
if (!se->ops->is_active(se->opaque)) {
|
1683 |
continue;
|
1684 |
} |
1685 |
} |
1686 |
if (qemu_file_rate_limit(f)) {
|
1687 |
return 0; |
1688 |
} |
1689 |
trace_savevm_section_start(); |
1690 |
/* Section type */
|
1691 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1692 |
qemu_put_be32(f, se->section_id); |
1693 |
|
1694 |
ret = se->ops->save_live_iterate(f, se->opaque); |
1695 |
trace_savevm_section_end(se->section_id); |
1696 |
|
1697 |
if (ret < 0) { |
1698 |
qemu_file_set_error(f, ret); |
1699 |
} |
1700 |
if (ret <= 0) { |
1701 |
/* Do not proceed to the next vmstate before this one reported
|
1702 |
completion of the current stage. This serializes the migration
|
1703 |
and reduces the probability that a faster changing state is
|
1704 |
synchronized over and over again. */
|
1705 |
break;
|
1706 |
} |
1707 |
} |
1708 |
return ret;
|
1709 |
} |
1710 |
|
1711 |
void qemu_savevm_state_complete(QEMUFile *f)
|
1712 |
{ |
1713 |
SaveStateEntry *se; |
1714 |
int ret;
|
1715 |
|
1716 |
cpu_synchronize_all_states(); |
1717 |
|
1718 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1719 |
if (!se->ops || !se->ops->save_live_complete) {
|
1720 |
continue;
|
1721 |
} |
1722 |
if (se->ops && se->ops->is_active) {
|
1723 |
if (!se->ops->is_active(se->opaque)) {
|
1724 |
continue;
|
1725 |
} |
1726 |
} |
1727 |
trace_savevm_section_start(); |
1728 |
/* Section type */
|
1729 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1730 |
qemu_put_be32(f, se->section_id); |
1731 |
|
1732 |
ret = se->ops->save_live_complete(f, se->opaque); |
1733 |
trace_savevm_section_end(se->section_id); |
1734 |
if (ret < 0) { |
1735 |
qemu_file_set_error(f, ret); |
1736 |
return;
|
1737 |
} |
1738 |
} |
1739 |
|
1740 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1741 |
int len;
|
1742 |
|
1743 |
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
1744 |
continue;
|
1745 |
} |
1746 |
trace_savevm_section_start(); |
1747 |
/* Section type */
|
1748 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1749 |
qemu_put_be32(f, se->section_id); |
1750 |
|
1751 |
/* ID string */
|
1752 |
len = strlen(se->idstr); |
1753 |
qemu_put_byte(f, len); |
1754 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1755 |
|
1756 |
qemu_put_be32(f, se->instance_id); |
1757 |
qemu_put_be32(f, se->version_id); |
1758 |
|
1759 |
vmstate_save(f, se); |
1760 |
trace_savevm_section_end(se->section_id); |
1761 |
} |
1762 |
|
1763 |
qemu_put_byte(f, QEMU_VM_EOF); |
1764 |
qemu_fflush(f); |
1765 |
} |
1766 |
|
1767 |
uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) |
1768 |
{ |
1769 |
SaveStateEntry *se; |
1770 |
uint64_t ret = 0;
|
1771 |
|
1772 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1773 |
if (!se->ops || !se->ops->save_live_pending) {
|
1774 |
continue;
|
1775 |
} |
1776 |
if (se->ops && se->ops->is_active) {
|
1777 |
if (!se->ops->is_active(se->opaque)) {
|
1778 |
continue;
|
1779 |
} |
1780 |
} |
1781 |
ret += se->ops->save_live_pending(f, se->opaque, max_size); |
1782 |
} |
1783 |
return ret;
|
1784 |
} |
1785 |
|
1786 |
void qemu_savevm_state_cancel(void) |
1787 |
{ |
1788 |
SaveStateEntry *se; |
1789 |
|
1790 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1791 |
if (se->ops && se->ops->cancel) {
|
1792 |
se->ops->cancel(se->opaque); |
1793 |
} |
1794 |
} |
1795 |
} |
1796 |
|
1797 |
static int qemu_savevm_state(QEMUFile *f) |
1798 |
{ |
1799 |
int ret;
|
1800 |
MigrationParams params = { |
1801 |
.blk = 0,
|
1802 |
.shared = 0
|
1803 |
}; |
1804 |
|
1805 |
if (qemu_savevm_state_blocked(NULL)) { |
1806 |
return -EINVAL;
|
1807 |
} |
1808 |
|
1809 |
qemu_mutex_unlock_iothread(); |
1810 |
qemu_savevm_state_begin(f, ¶ms); |
1811 |
qemu_mutex_lock_iothread(); |
1812 |
|
1813 |
while (qemu_file_get_error(f) == 0) { |
1814 |
if (qemu_savevm_state_iterate(f) > 0) { |
1815 |
break;
|
1816 |
} |
1817 |
} |
1818 |
|
1819 |
ret = qemu_file_get_error(f); |
1820 |
if (ret == 0) { |
1821 |
qemu_savevm_state_complete(f); |
1822 |
ret = qemu_file_get_error(f); |
1823 |
} |
1824 |
if (ret != 0) { |
1825 |
qemu_savevm_state_cancel(); |
1826 |
} |
1827 |
return ret;
|
1828 |
} |
1829 |
|
1830 |
static int qemu_save_device_state(QEMUFile *f) |
1831 |
{ |
1832 |
SaveStateEntry *se; |
1833 |
|
1834 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1835 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1836 |
|
1837 |
cpu_synchronize_all_states(); |
1838 |
|
1839 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1840 |
int len;
|
1841 |
|
1842 |
if (se->is_ram) {
|
1843 |
continue;
|
1844 |
} |
1845 |
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
1846 |
continue;
|
1847 |
} |
1848 |
|
1849 |
/* Section type */
|
1850 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1851 |
qemu_put_be32(f, se->section_id); |
1852 |
|
1853 |
/* ID string */
|
1854 |
len = strlen(se->idstr); |
1855 |
qemu_put_byte(f, len); |
1856 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1857 |
|
1858 |
qemu_put_be32(f, se->instance_id); |
1859 |
qemu_put_be32(f, se->version_id); |
1860 |
|
1861 |
vmstate_save(f, se); |
1862 |
} |
1863 |
|
1864 |
qemu_put_byte(f, QEMU_VM_EOF); |
1865 |
|
1866 |
return qemu_file_get_error(f);
|
1867 |
} |
1868 |
|
1869 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1870 |
{ |
1871 |
SaveStateEntry *se; |
1872 |
|
1873 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1874 |
if (!strcmp(se->idstr, idstr) &&
|
1875 |
(instance_id == se->instance_id || |
1876 |
instance_id == se->alias_id)) |
1877 |
return se;
|
1878 |
/* Migrating from an older version? */
|
1879 |
if (strstr(se->idstr, idstr) && se->compat) {
|
1880 |
if (!strcmp(se->compat->idstr, idstr) &&
|
1881 |
(instance_id == se->compat->instance_id || |
1882 |
instance_id == se->alias_id)) |
1883 |
return se;
|
1884 |
} |
1885 |
} |
1886 |
return NULL; |
1887 |
} |
1888 |
|
1889 |
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1890 |
{ |
1891 |
while(sub && sub->needed) {
|
1892 |
if (strcmp(idstr, sub->vmsd->name) == 0) { |
1893 |
return sub->vmsd;
|
1894 |
} |
1895 |
sub++; |
1896 |
} |
1897 |
return NULL; |
1898 |
} |
1899 |
|
1900 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1901 |
void *opaque)
|
1902 |
{ |
1903 |
while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
1904 |
char idstr[256]; |
1905 |
int ret;
|
1906 |
uint8_t version_id, len, size; |
1907 |
const VMStateDescription *sub_vmsd;
|
1908 |
|
1909 |
len = qemu_peek_byte(f, 1);
|
1910 |
if (len < strlen(vmsd->name) + 1) { |
1911 |
/* subsection name has be be "section_name/a" */
|
1912 |
return 0; |
1913 |
} |
1914 |
size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
|
1915 |
if (size != len) {
|
1916 |
return 0; |
1917 |
} |
1918 |
idstr[size] = 0;
|
1919 |
|
1920 |
if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1921 |
/* it don't have a valid subsection name */
|
1922 |
return 0; |
1923 |
} |
1924 |
sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
1925 |
if (sub_vmsd == NULL) { |
1926 |
return -ENOENT;
|
1927 |
} |
1928 |
qemu_file_skip(f, 1); /* subsection */ |
1929 |
qemu_file_skip(f, 1); /* len */ |
1930 |
qemu_file_skip(f, len); /* idstr */
|
1931 |
version_id = qemu_get_be32(f); |
1932 |
|
1933 |
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1934 |
if (ret) {
|
1935 |
return ret;
|
1936 |
} |
1937 |
} |
1938 |
return 0; |
1939 |
} |
1940 |
|
1941 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1942 |
void *opaque)
|
1943 |
{ |
1944 |
const VMStateSubsection *sub = vmsd->subsections;
|
1945 |
|
1946 |
while (sub && sub->needed) {
|
1947 |
if (sub->needed(opaque)) {
|
1948 |
const VMStateDescription *vmsd = sub->vmsd;
|
1949 |
uint8_t len; |
1950 |
|
1951 |
qemu_put_byte(f, QEMU_VM_SUBSECTION); |
1952 |
len = strlen(vmsd->name); |
1953 |
qemu_put_byte(f, len); |
1954 |
qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
1955 |
qemu_put_be32(f, vmsd->version_id); |
1956 |
vmstate_save_state(f, vmsd, opaque); |
1957 |
} |
1958 |
sub++; |
1959 |
} |
1960 |
} |
1961 |
|
1962 |
typedef struct LoadStateEntry { |
1963 |
QLIST_ENTRY(LoadStateEntry) entry; |
1964 |
SaveStateEntry *se; |
1965 |
int section_id;
|
1966 |
int version_id;
|
1967 |
} LoadStateEntry; |
1968 |
|
1969 |
int qemu_loadvm_state(QEMUFile *f)
|
1970 |
{ |
1971 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1972 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1973 |
LoadStateEntry *le, *new_le; |
1974 |
uint8_t section_type; |
1975 |
unsigned int v; |
1976 |
int ret;
|
1977 |
|
1978 |
if (qemu_savevm_state_blocked(NULL)) { |
1979 |
return -EINVAL;
|
1980 |
} |
1981 |
|
1982 |
v = qemu_get_be32(f); |
1983 |
if (v != QEMU_VM_FILE_MAGIC)
|
1984 |
return -EINVAL;
|
1985 |
|
1986 |
v = qemu_get_be32(f); |
1987 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1988 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1989 |
return -ENOTSUP;
|
1990 |
} |
1991 |
if (v != QEMU_VM_FILE_VERSION)
|
1992 |
return -ENOTSUP;
|
1993 |
|
1994 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1995 |
uint32_t instance_id, version_id, section_id; |
1996 |
SaveStateEntry *se; |
1997 |
char idstr[257]; |
1998 |
int len;
|
1999 |
|
2000 |
switch (section_type) {
|
2001 |
case QEMU_VM_SECTION_START:
|
2002 |
case QEMU_VM_SECTION_FULL:
|
2003 |
/* Read section start */
|
2004 |
section_id = qemu_get_be32(f); |
2005 |
len = qemu_get_byte(f); |
2006 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
2007 |
idstr[len] = 0;
|
2008 |
instance_id = qemu_get_be32(f); |
2009 |
version_id = qemu_get_be32(f); |
2010 |
|
2011 |
/* Find savevm section */
|
2012 |
se = find_se(idstr, instance_id); |
2013 |
if (se == NULL) { |
2014 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
2015 |
ret = -EINVAL; |
2016 |
goto out;
|
2017 |
} |
2018 |
|
2019 |
/* Validate version */
|
2020 |
if (version_id > se->version_id) {
|
2021 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
2022 |
version_id, idstr, se->version_id); |
2023 |
ret = -EINVAL; |
2024 |
goto out;
|
2025 |
} |
2026 |
|
2027 |
/* Add entry */
|
2028 |
le = g_malloc0(sizeof(*le));
|
2029 |
|
2030 |
le->se = se; |
2031 |
le->section_id = section_id; |
2032 |
le->version_id = version_id; |
2033 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
2034 |
|
2035 |
ret = vmstate_load(f, le->se, le->version_id); |
2036 |
if (ret < 0) { |
2037 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
2038 |
instance_id, idstr); |
2039 |
goto out;
|
2040 |
} |
2041 |
break;
|
2042 |
case QEMU_VM_SECTION_PART:
|
2043 |
case QEMU_VM_SECTION_END:
|
2044 |
section_id = qemu_get_be32(f); |
2045 |
|
2046 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
2047 |
if (le->section_id == section_id) {
|
2048 |
break;
|
2049 |
} |
2050 |
} |
2051 |
if (le == NULL) { |
2052 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
2053 |
ret = -EINVAL; |
2054 |
goto out;
|
2055 |
} |
2056 |
|
2057 |
ret = vmstate_load(f, le->se, le->version_id); |
2058 |
if (ret < 0) { |
2059 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
2060 |
section_id); |
2061 |
goto out;
|
2062 |
} |
2063 |
break;
|
2064 |
default:
|
2065 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
2066 |
ret = -EINVAL; |
2067 |
goto out;
|
2068 |
} |
2069 |
} |
2070 |
|
2071 |
cpu_synchronize_all_post_init(); |
2072 |
|
2073 |
ret = 0;
|
2074 |
|
2075 |
out:
|
2076 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
2077 |
QLIST_REMOVE(le, entry); |
2078 |
g_free(le); |
2079 |
} |
2080 |
|
2081 |
if (ret == 0) { |
2082 |
ret = qemu_file_get_error(f); |
2083 |
} |
2084 |
|
2085 |
return ret;
|
2086 |
} |
2087 |
|
2088 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
2089 |
const char *name) |
2090 |
{ |
2091 |
QEMUSnapshotInfo *sn_tab, *sn; |
2092 |
int nb_sns, i, ret;
|
2093 |
|
2094 |
ret = -ENOENT; |
2095 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
2096 |
if (nb_sns < 0) |
2097 |
return ret;
|
2098 |
for(i = 0; i < nb_sns; i++) { |
2099 |
sn = &sn_tab[i]; |
2100 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
2101 |
*sn_info = *sn; |
2102 |
ret = 0;
|
2103 |
break;
|
2104 |
} |
2105 |
} |
2106 |
g_free(sn_tab); |
2107 |
return ret;
|
2108 |
} |
2109 |
|
2110 |
/*
|
2111 |
* Deletes snapshots of a given name in all opened images.
|
2112 |
*/
|
2113 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
2114 |
{ |
2115 |
BlockDriverState *bs; |
2116 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
2117 |
int ret;
|
2118 |
|
2119 |
bs = NULL;
|
2120 |
while ((bs = bdrv_next(bs))) {
|
2121 |
if (bdrv_can_snapshot(bs) &&
|
2122 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
2123 |
{ |
2124 |
ret = bdrv_snapshot_delete(bs, name); |
2125 |
if (ret < 0) { |
2126 |
monitor_printf(mon, |
2127 |
"Error while deleting snapshot on '%s'\n",
|
2128 |
bdrv_get_device_name(bs)); |
2129 |
return -1; |
2130 |
} |
2131 |
} |
2132 |
} |
2133 |
|
2134 |
return 0; |
2135 |
} |
2136 |
|
2137 |
void do_savevm(Monitor *mon, const QDict *qdict) |
2138 |
{ |
2139 |
BlockDriverState *bs, *bs1; |
2140 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
2141 |
int ret;
|
2142 |
QEMUFile *f; |
2143 |
int saved_vm_running;
|
2144 |
uint64_t vm_state_size; |
2145 |
qemu_timeval tv; |
2146 |
struct tm tm;
|
2147 |
const char *name = qdict_get_try_str(qdict, "name"); |
2148 |
|
2149 |
/* Verify if there is a device that doesn't support snapshots and is writable */
|
2150 |
bs = NULL;
|
2151 |
while ((bs = bdrv_next(bs))) {
|
2152 |
|
2153 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
2154 |
continue;
|
2155 |
} |
2156 |
|
2157 |
if (!bdrv_can_snapshot(bs)) {
|
2158 |
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
2159 |
bdrv_get_device_name(bs)); |
2160 |
return;
|
2161 |
} |
2162 |
} |
2163 |
|
2164 |
bs = bdrv_snapshots(); |
2165 |
if (!bs) {
|
2166 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
2167 |
return;
|
2168 |
} |
2169 |
|
2170 |
saved_vm_running = runstate_is_running(); |
2171 |
vm_stop(RUN_STATE_SAVE_VM); |
2172 |
|
2173 |
memset(sn, 0, sizeof(*sn)); |
2174 |
|
2175 |
/* fill auxiliary fields */
|
2176 |
qemu_gettimeofday(&tv); |
2177 |
sn->date_sec = tv.tv_sec; |
2178 |
sn->date_nsec = tv.tv_usec * 1000;
|
2179 |
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
2180 |
|
2181 |
if (name) {
|
2182 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
2183 |
if (ret >= 0) { |
2184 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
2185 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
2186 |
} else {
|
2187 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
2188 |
} |
2189 |
} else {
|
2190 |
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
2191 |
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
2192 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2193 |
} |
2194 |
|
2195 |
/* Delete old snapshots of the same name */
|
2196 |
if (name && del_existing_snapshots(mon, name) < 0) { |
2197 |
goto the_end;
|
2198 |
} |
2199 |
|
2200 |
/* save the VM state */
|
2201 |
f = qemu_fopen_bdrv(bs, 1);
|
2202 |
if (!f) {
|
2203 |
monitor_printf(mon, "Could not open VM state file\n");
|
2204 |
goto the_end;
|
2205 |
} |
2206 |
ret = qemu_savevm_state(f); |
2207 |
vm_state_size = qemu_ftell(f); |
2208 |
qemu_fclose(f); |
2209 |
if (ret < 0) { |
2210 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
2211 |
goto the_end;
|
2212 |
} |
2213 |
|
2214 |
/* create the snapshots */
|
2215 |
|
2216 |
bs1 = NULL;
|
2217 |
while ((bs1 = bdrv_next(bs1))) {
|
2218 |
if (bdrv_can_snapshot(bs1)) {
|
2219 |
/* Write VM state size only to the image that contains the state */
|
2220 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
2221 |
ret = bdrv_snapshot_create(bs1, sn); |
2222 |
if (ret < 0) { |
2223 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
2224 |
bdrv_get_device_name(bs1)); |
2225 |
} |
2226 |
} |
2227 |
} |
2228 |
|
2229 |
the_end:
|
2230 |
if (saved_vm_running)
|
2231 |
vm_start(); |
2232 |
} |
2233 |
|
2234 |
void qmp_xen_save_devices_state(const char *filename, Error **errp) |
2235 |
{ |
2236 |
QEMUFile *f; |
2237 |
int saved_vm_running;
|
2238 |
int ret;
|
2239 |
|
2240 |
saved_vm_running = runstate_is_running(); |
2241 |
vm_stop(RUN_STATE_SAVE_VM); |
2242 |
|
2243 |
f = qemu_fopen(filename, "wb");
|
2244 |
if (!f) {
|
2245 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
2246 |
goto the_end;
|
2247 |
} |
2248 |
ret = qemu_save_device_state(f); |
2249 |
qemu_fclose(f); |
2250 |
if (ret < 0) { |
2251 |
error_set(errp, QERR_IO_ERROR); |
2252 |
} |
2253 |
|
2254 |
the_end:
|
2255 |
if (saved_vm_running)
|
2256 |
vm_start(); |
2257 |
} |
2258 |
|
2259 |
int load_vmstate(const char *name) |
2260 |
{ |
2261 |
BlockDriverState *bs, *bs_vm_state; |
2262 |
QEMUSnapshotInfo sn; |
2263 |
QEMUFile *f; |
2264 |
int ret;
|
2265 |
|
2266 |
bs_vm_state = bdrv_snapshots(); |
2267 |
if (!bs_vm_state) {
|
2268 |
error_report("No block device supports snapshots");
|
2269 |
return -ENOTSUP;
|
2270 |
} |
2271 |
|
2272 |
/* Don't even try to load empty VM states */
|
2273 |
ret = bdrv_snapshot_find(bs_vm_state, &sn, name); |
2274 |
if (ret < 0) { |
2275 |
return ret;
|
2276 |
} else if (sn.vm_state_size == 0) { |
2277 |
error_report("This is a disk-only snapshot. Revert to it offline "
|
2278 |
"using qemu-img.");
|
2279 |
return -EINVAL;
|
2280 |
} |
2281 |
|
2282 |
/* Verify if there is any device that doesn't support snapshots and is
|
2283 |
writable and check if the requested snapshot is available too. */
|
2284 |
bs = NULL;
|
2285 |
while ((bs = bdrv_next(bs))) {
|
2286 |
|
2287 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
2288 |
continue;
|
2289 |
} |
2290 |
|
2291 |
if (!bdrv_can_snapshot(bs)) {
|
2292 |
error_report("Device '%s' is writable but does not support snapshots.",
|
2293 |
bdrv_get_device_name(bs)); |
2294 |
return -ENOTSUP;
|
2295 |
} |
2296 |
|
2297 |
ret = bdrv_snapshot_find(bs, &sn, name); |
2298 |
if (ret < 0) { |
2299 |
error_report("Device '%s' does not have the requested snapshot '%s'",
|
2300 |
bdrv_get_device_name(bs), name); |
2301 |
return ret;
|
2302 |
} |
2303 |
} |
2304 |
|
2305 |
/* Flush all IO requests so they don't interfere with the new state. */
|
2306 |
bdrv_drain_all(); |
2307 |
|
2308 |
bs = NULL;
|
2309 |
while ((bs = bdrv_next(bs))) {
|
2310 |
if (bdrv_can_snapshot(bs)) {
|
2311 |
ret = bdrv_snapshot_goto(bs, name); |
2312 |
if (ret < 0) { |
2313 |
error_report("Error %d while activating snapshot '%s' on '%s'",
|
2314 |
ret, name, bdrv_get_device_name(bs)); |
2315 |
return ret;
|
2316 |
} |
2317 |
} |
2318 |
} |
2319 |
|
2320 |
/* restore the VM state */
|
2321 |
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
2322 |
if (!f) {
|
2323 |
error_report("Could not open VM state file");
|
2324 |
return -EINVAL;
|
2325 |
} |
2326 |
|
2327 |
qemu_system_reset(VMRESET_SILENT); |
2328 |
ret = qemu_loadvm_state(f); |
2329 |
|
2330 |
qemu_fclose(f); |
2331 |
if (ret < 0) { |
2332 |
error_report("Error %d while loading VM state", ret);
|
2333 |
return ret;
|
2334 |
} |
2335 |
|
2336 |
return 0; |
2337 |
} |
2338 |
|
2339 |
void do_delvm(Monitor *mon, const QDict *qdict) |
2340 |
{ |
2341 |
BlockDriverState *bs, *bs1; |
2342 |
int ret;
|
2343 |
const char *name = qdict_get_str(qdict, "name"); |
2344 |
|
2345 |
bs = bdrv_snapshots(); |
2346 |
if (!bs) {
|
2347 |
monitor_printf(mon, "No block device supports snapshots\n");
|
2348 |
return;
|
2349 |
} |
2350 |
|
2351 |
bs1 = NULL;
|
2352 |
while ((bs1 = bdrv_next(bs1))) {
|
2353 |
if (bdrv_can_snapshot(bs1)) {
|
2354 |
ret = bdrv_snapshot_delete(bs1, name); |
2355 |
if (ret < 0) { |
2356 |
if (ret == -ENOTSUP)
|
2357 |
monitor_printf(mon, |
2358 |
"Snapshots not supported on device '%s'\n",
|
2359 |
bdrv_get_device_name(bs1)); |
2360 |
else
|
2361 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
2362 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
2363 |
} |
2364 |
} |
2365 |
} |
2366 |
} |
2367 |
|
2368 |
void do_info_snapshots(Monitor *mon, const QDict *qdict) |
2369 |
{ |
2370 |
BlockDriverState *bs, *bs1; |
2371 |
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2372 |
int nb_sns, i, ret, available;
|
2373 |
int total;
|
2374 |
int *available_snapshots;
|
2375 |
char buf[256]; |
2376 |
|
2377 |
bs = bdrv_snapshots(); |
2378 |
if (!bs) {
|
2379 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
2380 |
return;
|
2381 |
} |
2382 |
|
2383 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
2384 |
if (nb_sns < 0) { |
2385 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
2386 |
return;
|
2387 |
} |
2388 |
|
2389 |
if (nb_sns == 0) { |
2390 |
monitor_printf(mon, "There is no snapshot available.\n");
|
2391 |
return;
|
2392 |
} |
2393 |
|
2394 |
available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
2395 |
total = 0;
|
2396 |
for (i = 0; i < nb_sns; i++) { |
2397 |
sn = &sn_tab[i]; |
2398 |
available = 1;
|
2399 |
bs1 = NULL;
|
2400 |
|
2401 |
while ((bs1 = bdrv_next(bs1))) {
|
2402 |
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
2403 |
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); |
2404 |
if (ret < 0) { |
2405 |
available = 0;
|
2406 |
break;
|
2407 |
} |
2408 |
} |
2409 |
} |
2410 |
|
2411 |
if (available) {
|
2412 |
available_snapshots[total] = i; |
2413 |
total++; |
2414 |
} |
2415 |
} |
2416 |
|
2417 |
if (total > 0) { |
2418 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
2419 |
for (i = 0; i < total; i++) { |
2420 |
sn = &sn_tab[available_snapshots[i]]; |
2421 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
2422 |
} |
2423 |
} else {
|
2424 |
monitor_printf(mon, "There is no suitable snapshot available\n");
|
2425 |
} |
2426 |
|
2427 |
g_free(sn_tab); |
2428 |
g_free(available_snapshots); |
2429 |
|
2430 |
} |
2431 |
|
2432 |
void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
|
2433 |
{ |
2434 |
qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
2435 |
memory_region_name(mr), dev); |
2436 |
} |
2437 |
|
2438 |
void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
|
2439 |
{ |
2440 |
/* Nothing do to while the implementation is in RAMBlock */
|
2441 |
} |
2442 |
|
2443 |
void vmstate_register_ram_global(MemoryRegion *mr)
|
2444 |
{ |
2445 |
vmstate_register_ram(mr, NULL);
|
2446 |
} |