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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
25 |
#include <fcntl.h> |
26 |
#include <signal.h> |
27 |
#include <time.h> |
28 |
#include <errno.h> |
29 |
#include <sys/time.h> |
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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> |
39 |
#include <sys/mman.h> |
40 |
#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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#include <arpa/inet.h> |
46 |
#include <dirent.h> |
47 |
#include <netdb.h> |
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#include <sys/select.h> |
49 |
#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> |
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#else
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#ifdef __linux__
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#include <pty.h> |
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#include <malloc.h> |
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#include <linux/rtc.h> |
63 |
#endif
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#endif
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#endif
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66 |
|
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#ifdef _WIN32
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#include <windows.h> |
69 |
#include <malloc.h> |
70 |
#include <sys/timeb.h> |
71 |
#include <mmsystem.h> |
72 |
#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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75 |
|
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#include "qemu-common.h" |
77 |
#include "hw/hw.h" |
78 |
#include "net.h" |
79 |
#include "monitor.h" |
80 |
#include "sysemu.h" |
81 |
#include "qemu-timer.h" |
82 |
#include "qemu-char.h" |
83 |
#include "block.h" |
84 |
#include "audio/audio.h" |
85 |
#include "migration.h" |
86 |
#include "qemu_socket.h" |
87 |
#include "qemu-queue.h" |
88 |
|
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/* point to the block driver where the snapshots are managed */
|
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static BlockDriverState *bs_snapshots;
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|
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#define SELF_ANNOUNCE_ROUNDS 5 |
93 |
|
94 |
#ifndef ETH_P_RARP
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#define ETH_P_RARP 0x0835 |
96 |
#endif
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#define ARP_HTYPE_ETH 0x0001 |
98 |
#define ARP_PTYPE_IP 0x0800 |
99 |
#define ARP_OP_REQUEST_REV 0x3 |
100 |
|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
103 |
{ |
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/* Ethernet header. */
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memset(buf, 0xff, 6); /* destination MAC addr */ |
106 |
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
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*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
108 |
|
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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 */ |
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*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
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*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
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*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
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memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
116 |
memset(buf + 28, 0x00, 4); /* source protocol addr */ |
117 |
memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
118 |
memset(buf + 38, 0x00, 4); /* target protocol addr */ |
119 |
|
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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); |
122 |
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return 60; /* len (FCS will be added by hardware) */ |
124 |
} |
125 |
|
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static void qemu_announce_self_once(void *opaque) |
127 |
{ |
128 |
int i, len;
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uint8_t buf[60];
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static int count = SELF_ANNOUNCE_ROUNDS; |
131 |
QEMUTimer *timer = *(QEMUTimer **)opaque; |
132 |
|
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for (i = 0; i < MAX_NICS; i++) { |
134 |
if (!nd_table[i].used)
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continue;
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len = announce_self_create(buf, nd_table[i].macaddr); |
137 |
qemu_send_packet_raw(nd_table[i].vc, buf, len); |
138 |
} |
139 |
if (--count) {
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140 |
/* delay 50ms, 150ms, 250ms, ... */
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qemu_mod_timer(timer, qemu_get_clock(rt_clock) + |
142 |
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
143 |
} else {
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qemu_del_timer(timer); |
145 |
qemu_free_timer(timer); |
146 |
} |
147 |
} |
148 |
|
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void qemu_announce_self(void) |
150 |
{ |
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static QEMUTimer *timer;
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timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer); |
153 |
qemu_announce_self_once(&timer); |
154 |
} |
155 |
|
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/***********************************************************/
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157 |
/* savevm/loadvm support */
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158 |
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#define IO_BUF_SIZE 32768 |
160 |
|
161 |
struct QEMUFile {
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162 |
QEMUFilePutBufferFunc *put_buffer; |
163 |
QEMUFileGetBufferFunc *get_buffer; |
164 |
QEMUFileCloseFunc *close; |
165 |
QEMUFileRateLimit *rate_limit; |
166 |
QEMUFileSetRateLimit *set_rate_limit; |
167 |
void *opaque;
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int is_write;
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169 |
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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 */ |
174 |
uint8_t buf[IO_BUF_SIZE]; |
175 |
|
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int has_error;
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}; |
178 |
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typedef struct QEMUFileStdio |
180 |
{ |
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FILE *stdio_file; |
182 |
QEMUFile *file; |
183 |
} QEMUFileStdio; |
184 |
|
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typedef struct QEMUFileSocket |
186 |
{ |
187 |
int fd;
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QEMUFile *file; |
189 |
} QEMUFileSocket; |
190 |
|
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static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
192 |
{ |
193 |
QEMUFileSocket *s = opaque; |
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ssize_t len; |
195 |
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do {
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len = recv(s->fd, (void *)buf, size, 0); |
198 |
} while (len == -1 && socket_error() == EINTR); |
199 |
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200 |
if (len == -1) |
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len = -socket_error(); |
202 |
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return len;
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} |
205 |
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static int socket_close(void *opaque) |
207 |
{ |
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QEMUFileSocket *s = opaque; |
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qemu_free(s); |
210 |
return 0; |
211 |
} |
212 |
|
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static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
214 |
{ |
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QEMUFileStdio *s = opaque; |
216 |
return fwrite(buf, 1, size, s->stdio_file); |
217 |
} |
218 |
|
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
220 |
{ |
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QEMUFileStdio *s = opaque; |
222 |
FILE *fp = s->stdio_file; |
223 |
int bytes;
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224 |
|
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do {
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clearerr(fp); |
227 |
bytes = fread(buf, 1, size, fp);
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
229 |
return bytes;
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} |
231 |
|
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static int stdio_pclose(void *opaque) |
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{ |
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QEMUFileStdio *s = opaque; |
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pclose(s->stdio_file); |
236 |
qemu_free(s); |
237 |
return 0; |
238 |
} |
239 |
|
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static int stdio_fclose(void *opaque) |
241 |
{ |
242 |
QEMUFileStdio *s = opaque; |
243 |
fclose(s->stdio_file); |
244 |
qemu_free(s); |
245 |
return 0; |
246 |
} |
247 |
|
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QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
249 |
{ |
250 |
QEMUFileStdio *s; |
251 |
|
252 |
if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
253 |
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL; |
255 |
} |
256 |
|
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s = qemu_mallocz(sizeof(QEMUFileStdio));
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s->stdio_file = stdio_file; |
260 |
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if(mode[0] == 'r') { |
262 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose, NULL, NULL); |
263 |
} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose, NULL, NULL); |
265 |
} |
266 |
return s->file;
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} |
268 |
|
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
270 |
{ |
271 |
FILE *popen_file; |
272 |
|
273 |
popen_file = popen(command, mode); |
274 |
if(popen_file == NULL) { |
275 |
return NULL; |
276 |
} |
277 |
|
278 |
return qemu_popen(popen_file, mode);
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279 |
} |
280 |
|
281 |
int qemu_stdio_fd(QEMUFile *f)
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{ |
283 |
QEMUFileStdio *p; |
284 |
int fd;
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285 |
|
286 |
p = (QEMUFileStdio *)f->opaque; |
287 |
fd = fileno(p->stdio_file); |
288 |
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289 |
return fd;
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290 |
} |
291 |
|
292 |
QEMUFile *qemu_fdopen(int fd, const char *mode) |
293 |
{ |
294 |
QEMUFileStdio *s; |
295 |
|
296 |
if (mode == NULL || |
297 |
(mode[0] != 'r' && mode[0] != 'w') || |
298 |
mode[1] != 'b' || mode[2] != 0) { |
299 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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300 |
return NULL; |
301 |
} |
302 |
|
303 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
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304 |
s->stdio_file = fdopen(fd, mode); |
305 |
if (!s->stdio_file)
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306 |
goto fail;
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307 |
|
308 |
if(mode[0] == 'r') { |
309 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose, NULL, NULL); |
310 |
} else {
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311 |
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose, NULL, NULL); |
312 |
} |
313 |
return s->file;
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314 |
|
315 |
fail:
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316 |
qemu_free(s); |
317 |
return NULL; |
318 |
} |
319 |
|
320 |
QEMUFile *qemu_fopen_socket(int fd)
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321 |
{ |
322 |
QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
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323 |
|
324 |
s->fd = fd; |
325 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL, NULL); |
326 |
return s->file;
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327 |
} |
328 |
|
329 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
330 |
int64_t pos, int size)
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331 |
{ |
332 |
QEMUFileStdio *s = opaque; |
333 |
fseek(s->stdio_file, pos, SEEK_SET); |
334 |
fwrite(buf, 1, size, s->stdio_file);
|
335 |
return size;
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336 |
} |
337 |
|
338 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
339 |
{ |
340 |
QEMUFileStdio *s = opaque; |
341 |
fseek(s->stdio_file, pos, SEEK_SET); |
342 |
return fread(buf, 1, size, s->stdio_file); |
343 |
} |
344 |
|
345 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
346 |
{ |
347 |
QEMUFileStdio *s; |
348 |
|
349 |
if (mode == NULL || |
350 |
(mode[0] != 'r' && mode[0] != 'w') || |
351 |
mode[1] != 'b' || mode[2] != 0) { |
352 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
|
353 |
return NULL; |
354 |
} |
355 |
|
356 |
s = qemu_mallocz(sizeof(QEMUFileStdio));
|
357 |
|
358 |
s->stdio_file = fopen(filename, mode); |
359 |
if (!s->stdio_file)
|
360 |
goto fail;
|
361 |
|
362 |
if(mode[0] == 'w') { |
363 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose, NULL, NULL); |
364 |
} else {
|
365 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose, NULL, NULL); |
366 |
} |
367 |
return s->file;
|
368 |
fail:
|
369 |
qemu_free(s); |
370 |
return NULL; |
371 |
} |
372 |
|
373 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
374 |
int64_t pos, int size)
|
375 |
{ |
376 |
bdrv_save_vmstate(opaque, buf, pos, size); |
377 |
return size;
|
378 |
} |
379 |
|
380 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
381 |
{ |
382 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
383 |
} |
384 |
|
385 |
static int bdrv_fclose(void *opaque) |
386 |
{ |
387 |
return 0; |
388 |
} |
389 |
|
390 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
391 |
{ |
392 |
if (is_writable)
|
393 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, NULL, NULL); |
394 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL); |
395 |
} |
396 |
|
397 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
398 |
QEMUFileGetBufferFunc *get_buffer, |
399 |
QEMUFileCloseFunc *close, |
400 |
QEMUFileRateLimit *rate_limit, |
401 |
QEMUFileSetRateLimit *set_rate_limit) |
402 |
{ |
403 |
QEMUFile *f; |
404 |
|
405 |
f = qemu_mallocz(sizeof(QEMUFile));
|
406 |
|
407 |
f->opaque = opaque; |
408 |
f->put_buffer = put_buffer; |
409 |
f->get_buffer = get_buffer; |
410 |
f->close = close; |
411 |
f->rate_limit = rate_limit; |
412 |
f->set_rate_limit = set_rate_limit; |
413 |
f->is_write = 0;
|
414 |
|
415 |
return f;
|
416 |
} |
417 |
|
418 |
int qemu_file_has_error(QEMUFile *f)
|
419 |
{ |
420 |
return f->has_error;
|
421 |
} |
422 |
|
423 |
void qemu_file_set_error(QEMUFile *f)
|
424 |
{ |
425 |
f->has_error = 1;
|
426 |
} |
427 |
|
428 |
void qemu_fflush(QEMUFile *f)
|
429 |
{ |
430 |
if (!f->put_buffer)
|
431 |
return;
|
432 |
|
433 |
if (f->is_write && f->buf_index > 0) { |
434 |
int len;
|
435 |
|
436 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
437 |
if (len > 0) |
438 |
f->buf_offset += f->buf_index; |
439 |
else
|
440 |
f->has_error = 1;
|
441 |
f->buf_index = 0;
|
442 |
} |
443 |
} |
444 |
|
445 |
static void qemu_fill_buffer(QEMUFile *f) |
446 |
{ |
447 |
int len;
|
448 |
|
449 |
if (!f->get_buffer)
|
450 |
return;
|
451 |
|
452 |
if (f->is_write)
|
453 |
abort(); |
454 |
|
455 |
len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE); |
456 |
if (len > 0) { |
457 |
f->buf_index = 0;
|
458 |
f->buf_size = len; |
459 |
f->buf_offset += len; |
460 |
} else if (len != -EAGAIN) |
461 |
f->has_error = 1;
|
462 |
} |
463 |
|
464 |
int qemu_fclose(QEMUFile *f)
|
465 |
{ |
466 |
int ret = 0; |
467 |
qemu_fflush(f); |
468 |
if (f->close)
|
469 |
ret = f->close(f->opaque); |
470 |
qemu_free(f); |
471 |
return ret;
|
472 |
} |
473 |
|
474 |
void qemu_file_put_notify(QEMUFile *f)
|
475 |
{ |
476 |
f->put_buffer(f->opaque, NULL, 0, 0); |
477 |
} |
478 |
|
479 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
480 |
{ |
481 |
int l;
|
482 |
|
483 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
484 |
fprintf(stderr, |
485 |
"Attempted to write to buffer while read buffer is not empty\n");
|
486 |
abort(); |
487 |
} |
488 |
|
489 |
while (!f->has_error && size > 0) { |
490 |
l = IO_BUF_SIZE - f->buf_index; |
491 |
if (l > size)
|
492 |
l = size; |
493 |
memcpy(f->buf + f->buf_index, buf, l); |
494 |
f->is_write = 1;
|
495 |
f->buf_index += l; |
496 |
buf += l; |
497 |
size -= l; |
498 |
if (f->buf_index >= IO_BUF_SIZE)
|
499 |
qemu_fflush(f); |
500 |
} |
501 |
} |
502 |
|
503 |
void qemu_put_byte(QEMUFile *f, int v) |
504 |
{ |
505 |
if (!f->has_error && f->is_write == 0 && f->buf_index > 0) { |
506 |
fprintf(stderr, |
507 |
"Attempted to write to buffer while read buffer is not empty\n");
|
508 |
abort(); |
509 |
} |
510 |
|
511 |
f->buf[f->buf_index++] = v; |
512 |
f->is_write = 1;
|
513 |
if (f->buf_index >= IO_BUF_SIZE)
|
514 |
qemu_fflush(f); |
515 |
} |
516 |
|
517 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1) |
518 |
{ |
519 |
int size, l;
|
520 |
|
521 |
if (f->is_write)
|
522 |
abort(); |
523 |
|
524 |
size = size1; |
525 |
while (size > 0) { |
526 |
l = f->buf_size - f->buf_index; |
527 |
if (l == 0) { |
528 |
qemu_fill_buffer(f); |
529 |
l = f->buf_size - f->buf_index; |
530 |
if (l == 0) |
531 |
break;
|
532 |
} |
533 |
if (l > size)
|
534 |
l = size; |
535 |
memcpy(buf, f->buf + f->buf_index, l); |
536 |
f->buf_index += l; |
537 |
buf += l; |
538 |
size -= l; |
539 |
} |
540 |
return size1 - size;
|
541 |
} |
542 |
|
543 |
int qemu_get_byte(QEMUFile *f)
|
544 |
{ |
545 |
if (f->is_write)
|
546 |
abort(); |
547 |
|
548 |
if (f->buf_index >= f->buf_size) {
|
549 |
qemu_fill_buffer(f); |
550 |
if (f->buf_index >= f->buf_size)
|
551 |
return 0; |
552 |
} |
553 |
return f->buf[f->buf_index++];
|
554 |
} |
555 |
|
556 |
int64_t qemu_ftell(QEMUFile *f) |
557 |
{ |
558 |
return f->buf_offset - f->buf_size + f->buf_index;
|
559 |
} |
560 |
|
561 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
562 |
{ |
563 |
if (whence == SEEK_SET) {
|
564 |
/* nothing to do */
|
565 |
} else if (whence == SEEK_CUR) { |
566 |
pos += qemu_ftell(f); |
567 |
} else {
|
568 |
/* SEEK_END not supported */
|
569 |
return -1; |
570 |
} |
571 |
if (f->put_buffer) {
|
572 |
qemu_fflush(f); |
573 |
f->buf_offset = pos; |
574 |
} else {
|
575 |
f->buf_offset = pos; |
576 |
f->buf_index = 0;
|
577 |
f->buf_size = 0;
|
578 |
} |
579 |
return pos;
|
580 |
} |
581 |
|
582 |
int qemu_file_rate_limit(QEMUFile *f)
|
583 |
{ |
584 |
if (f->rate_limit)
|
585 |
return f->rate_limit(f->opaque);
|
586 |
|
587 |
return 0; |
588 |
} |
589 |
|
590 |
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate) |
591 |
{ |
592 |
/* any failed or completed migration keeps its state to allow probing of
|
593 |
* migration data, but has no associated file anymore */
|
594 |
if (f && f->set_rate_limit)
|
595 |
return f->set_rate_limit(f->opaque, new_rate);
|
596 |
|
597 |
return 0; |
598 |
} |
599 |
|
600 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
601 |
{ |
602 |
qemu_put_byte(f, v >> 8);
|
603 |
qemu_put_byte(f, v); |
604 |
} |
605 |
|
606 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
607 |
{ |
608 |
qemu_put_byte(f, v >> 24);
|
609 |
qemu_put_byte(f, v >> 16);
|
610 |
qemu_put_byte(f, v >> 8);
|
611 |
qemu_put_byte(f, v); |
612 |
} |
613 |
|
614 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
615 |
{ |
616 |
qemu_put_be32(f, v >> 32);
|
617 |
qemu_put_be32(f, v); |
618 |
} |
619 |
|
620 |
unsigned int qemu_get_be16(QEMUFile *f) |
621 |
{ |
622 |
unsigned int v; |
623 |
v = qemu_get_byte(f) << 8;
|
624 |
v |= qemu_get_byte(f); |
625 |
return v;
|
626 |
} |
627 |
|
628 |
unsigned int qemu_get_be32(QEMUFile *f) |
629 |
{ |
630 |
unsigned int v; |
631 |
v = qemu_get_byte(f) << 24;
|
632 |
v |= qemu_get_byte(f) << 16;
|
633 |
v |= qemu_get_byte(f) << 8;
|
634 |
v |= qemu_get_byte(f); |
635 |
return v;
|
636 |
} |
637 |
|
638 |
uint64_t qemu_get_be64(QEMUFile *f) |
639 |
{ |
640 |
uint64_t v; |
641 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
642 |
v |= qemu_get_be32(f); |
643 |
return v;
|
644 |
} |
645 |
|
646 |
/* 8 bit int */
|
647 |
|
648 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
649 |
{ |
650 |
int8_t *v = pv; |
651 |
qemu_get_s8s(f, v); |
652 |
return 0; |
653 |
} |
654 |
|
655 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
656 |
{ |
657 |
int8_t *v = pv; |
658 |
qemu_put_s8s(f, v); |
659 |
} |
660 |
|
661 |
const VMStateInfo vmstate_info_int8 = {
|
662 |
.name = "int8",
|
663 |
.get = get_int8, |
664 |
.put = put_int8, |
665 |
}; |
666 |
|
667 |
/* 16 bit int */
|
668 |
|
669 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
670 |
{ |
671 |
int16_t *v = pv; |
672 |
qemu_get_sbe16s(f, v); |
673 |
return 0; |
674 |
} |
675 |
|
676 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
677 |
{ |
678 |
int16_t *v = pv; |
679 |
qemu_put_sbe16s(f, v); |
680 |
} |
681 |
|
682 |
const VMStateInfo vmstate_info_int16 = {
|
683 |
.name = "int16",
|
684 |
.get = get_int16, |
685 |
.put = put_int16, |
686 |
}; |
687 |
|
688 |
/* 32 bit int */
|
689 |
|
690 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
691 |
{ |
692 |
int32_t *v = pv; |
693 |
qemu_get_sbe32s(f, v); |
694 |
return 0; |
695 |
} |
696 |
|
697 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
698 |
{ |
699 |
int32_t *v = pv; |
700 |
qemu_put_sbe32s(f, v); |
701 |
} |
702 |
|
703 |
const VMStateInfo vmstate_info_int32 = {
|
704 |
.name = "int32",
|
705 |
.get = get_int32, |
706 |
.put = put_int32, |
707 |
}; |
708 |
|
709 |
/* 32 bit int. See that the received value is the same than the one
|
710 |
in the field */
|
711 |
|
712 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
713 |
{ |
714 |
int32_t *v = pv; |
715 |
int32_t v2; |
716 |
qemu_get_sbe32s(f, &v2); |
717 |
|
718 |
if (*v == v2)
|
719 |
return 0; |
720 |
return -EINVAL;
|
721 |
} |
722 |
|
723 |
const VMStateInfo vmstate_info_int32_equal = {
|
724 |
.name = "int32 equal",
|
725 |
.get = get_int32_equal, |
726 |
.put = put_int32, |
727 |
}; |
728 |
|
729 |
/* 32 bit int. See that the received value is the less or the same
|
730 |
than the one in the field */
|
731 |
|
732 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
733 |
{ |
734 |
int32_t *old = pv; |
735 |
int32_t new; |
736 |
qemu_get_sbe32s(f, &new); |
737 |
|
738 |
if (*old <= new)
|
739 |
return 0; |
740 |
return -EINVAL;
|
741 |
} |
742 |
|
743 |
const VMStateInfo vmstate_info_int32_le = {
|
744 |
.name = "int32 equal",
|
745 |
.get = get_int32_le, |
746 |
.put = put_int32, |
747 |
}; |
748 |
|
749 |
/* 64 bit int */
|
750 |
|
751 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
752 |
{ |
753 |
int64_t *v = pv; |
754 |
qemu_get_sbe64s(f, v); |
755 |
return 0; |
756 |
} |
757 |
|
758 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
759 |
{ |
760 |
int64_t *v = pv; |
761 |
qemu_put_sbe64s(f, v); |
762 |
} |
763 |
|
764 |
const VMStateInfo vmstate_info_int64 = {
|
765 |
.name = "int64",
|
766 |
.get = get_int64, |
767 |
.put = put_int64, |
768 |
}; |
769 |
|
770 |
/* 8 bit unsigned int */
|
771 |
|
772 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
773 |
{ |
774 |
uint8_t *v = pv; |
775 |
qemu_get_8s(f, v); |
776 |
return 0; |
777 |
} |
778 |
|
779 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
780 |
{ |
781 |
uint8_t *v = pv; |
782 |
qemu_put_8s(f, v); |
783 |
} |
784 |
|
785 |
const VMStateInfo vmstate_info_uint8 = {
|
786 |
.name = "uint8",
|
787 |
.get = get_uint8, |
788 |
.put = put_uint8, |
789 |
}; |
790 |
|
791 |
/* 16 bit unsigned int */
|
792 |
|
793 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
794 |
{ |
795 |
uint16_t *v = pv; |
796 |
qemu_get_be16s(f, v); |
797 |
return 0; |
798 |
} |
799 |
|
800 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
801 |
{ |
802 |
uint16_t *v = pv; |
803 |
qemu_put_be16s(f, v); |
804 |
} |
805 |
|
806 |
const VMStateInfo vmstate_info_uint16 = {
|
807 |
.name = "uint16",
|
808 |
.get = get_uint16, |
809 |
.put = put_uint16, |
810 |
}; |
811 |
|
812 |
/* 32 bit unsigned int */
|
813 |
|
814 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
815 |
{ |
816 |
uint32_t *v = pv; |
817 |
qemu_get_be32s(f, v); |
818 |
return 0; |
819 |
} |
820 |
|
821 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
822 |
{ |
823 |
uint32_t *v = pv; |
824 |
qemu_put_be32s(f, v); |
825 |
} |
826 |
|
827 |
const VMStateInfo vmstate_info_uint32 = {
|
828 |
.name = "uint32",
|
829 |
.get = get_uint32, |
830 |
.put = put_uint32, |
831 |
}; |
832 |
|
833 |
/* 64 bit unsigned int */
|
834 |
|
835 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
836 |
{ |
837 |
uint64_t *v = pv; |
838 |
qemu_get_be64s(f, v); |
839 |
return 0; |
840 |
} |
841 |
|
842 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
843 |
{ |
844 |
uint64_t *v = pv; |
845 |
qemu_put_be64s(f, v); |
846 |
} |
847 |
|
848 |
const VMStateInfo vmstate_info_uint64 = {
|
849 |
.name = "uint64",
|
850 |
.get = get_uint64, |
851 |
.put = put_uint64, |
852 |
}; |
853 |
|
854 |
/* 8 bit int. See that the received value is the same than the one
|
855 |
in the field */
|
856 |
|
857 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
858 |
{ |
859 |
uint8_t *v = pv; |
860 |
uint8_t v2; |
861 |
qemu_get_8s(f, &v2); |
862 |
|
863 |
if (*v == v2)
|
864 |
return 0; |
865 |
return -EINVAL;
|
866 |
} |
867 |
|
868 |
const VMStateInfo vmstate_info_uint8_equal = {
|
869 |
.name = "uint8 equal",
|
870 |
.get = get_uint8_equal, |
871 |
.put = put_uint8, |
872 |
}; |
873 |
|
874 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
875 |
in the field */
|
876 |
|
877 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
878 |
{ |
879 |
uint16_t *v = pv; |
880 |
uint16_t v2; |
881 |
qemu_get_be16s(f, &v2); |
882 |
|
883 |
if (*v == v2)
|
884 |
return 0; |
885 |
return -EINVAL;
|
886 |
} |
887 |
|
888 |
const VMStateInfo vmstate_info_uint16_equal = {
|
889 |
.name = "uint16 equal",
|
890 |
.get = get_uint16_equal, |
891 |
.put = put_uint16, |
892 |
}; |
893 |
|
894 |
/* timers */
|
895 |
|
896 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
897 |
{ |
898 |
QEMUTimer *v = pv; |
899 |
qemu_get_timer(f, v); |
900 |
return 0; |
901 |
} |
902 |
|
903 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
904 |
{ |
905 |
QEMUTimer *v = pv; |
906 |
qemu_put_timer(f, v); |
907 |
} |
908 |
|
909 |
const VMStateInfo vmstate_info_timer = {
|
910 |
.name = "timer",
|
911 |
.get = get_timer, |
912 |
.put = put_timer, |
913 |
}; |
914 |
|
915 |
/* uint8_t buffers */
|
916 |
|
917 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
918 |
{ |
919 |
uint8_t *v = pv; |
920 |
qemu_get_buffer(f, v, size); |
921 |
return 0; |
922 |
} |
923 |
|
924 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
925 |
{ |
926 |
uint8_t *v = pv; |
927 |
qemu_put_buffer(f, v, size); |
928 |
} |
929 |
|
930 |
const VMStateInfo vmstate_info_buffer = {
|
931 |
.name = "buffer",
|
932 |
.get = get_buffer, |
933 |
.put = put_buffer, |
934 |
}; |
935 |
|
936 |
/* unused buffers: space that was used for some fields that are
|
937 |
not usefull anymore */
|
938 |
|
939 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
940 |
{ |
941 |
qemu_fseek(f, size, SEEK_CUR); |
942 |
return 0; |
943 |
} |
944 |
|
945 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
946 |
{ |
947 |
qemu_fseek(f, size, SEEK_CUR); |
948 |
} |
949 |
|
950 |
const VMStateInfo vmstate_info_unused_buffer = {
|
951 |
.name = "unused_buffer",
|
952 |
.get = get_unused_buffer, |
953 |
.put = put_unused_buffer, |
954 |
}; |
955 |
|
956 |
typedef struct SaveStateEntry { |
957 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
958 |
char idstr[256]; |
959 |
int instance_id;
|
960 |
int version_id;
|
961 |
int section_id;
|
962 |
SaveLiveStateHandler *save_live_state; |
963 |
SaveStateHandler *save_state; |
964 |
LoadStateHandler *load_state; |
965 |
const VMStateDescription *vmsd;
|
966 |
void *opaque;
|
967 |
} SaveStateEntry; |
968 |
|
969 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
970 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
971 |
static int global_section_id; |
972 |
|
973 |
static int calculate_new_instance_id(const char *idstr) |
974 |
{ |
975 |
SaveStateEntry *se; |
976 |
int instance_id = 0; |
977 |
|
978 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
979 |
if (strcmp(idstr, se->idstr) == 0 |
980 |
&& instance_id <= se->instance_id) { |
981 |
instance_id = se->instance_id + 1;
|
982 |
} |
983 |
} |
984 |
return instance_id;
|
985 |
} |
986 |
|
987 |
/* TODO: Individual devices generally have very little idea about the rest
|
988 |
of the system, so instance_id should be removed/replaced.
|
989 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
990 |
distinguishing id for all instances of your device class. */
|
991 |
int register_savevm_live(const char *idstr, |
992 |
int instance_id,
|
993 |
int version_id,
|
994 |
SaveLiveStateHandler *save_live_state, |
995 |
SaveStateHandler *save_state, |
996 |
LoadStateHandler *load_state, |
997 |
void *opaque)
|
998 |
{ |
999 |
SaveStateEntry *se; |
1000 |
|
1001 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
1002 |
pstrcpy(se->idstr, sizeof(se->idstr), idstr);
|
1003 |
se->version_id = version_id; |
1004 |
se->section_id = global_section_id++; |
1005 |
se->save_live_state = save_live_state; |
1006 |
se->save_state = save_state; |
1007 |
se->load_state = load_state; |
1008 |
se->opaque = opaque; |
1009 |
se->vmsd = NULL;
|
1010 |
|
1011 |
if (instance_id == -1) { |
1012 |
se->instance_id = calculate_new_instance_id(idstr); |
1013 |
} else {
|
1014 |
se->instance_id = instance_id; |
1015 |
} |
1016 |
/* add at the end of list */
|
1017 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1018 |
return 0; |
1019 |
} |
1020 |
|
1021 |
int register_savevm(const char *idstr, |
1022 |
int instance_id,
|
1023 |
int version_id,
|
1024 |
SaveStateHandler *save_state, |
1025 |
LoadStateHandler *load_state, |
1026 |
void *opaque)
|
1027 |
{ |
1028 |
return register_savevm_live(idstr, instance_id, version_id,
|
1029 |
NULL, save_state, load_state, opaque);
|
1030 |
} |
1031 |
|
1032 |
void unregister_savevm(const char *idstr, void *opaque) |
1033 |
{ |
1034 |
SaveStateEntry *se, *new_se; |
1035 |
|
1036 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1037 |
if (strcmp(se->idstr, idstr) == 0 && se->opaque == opaque) { |
1038 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1039 |
qemu_free(se); |
1040 |
} |
1041 |
} |
1042 |
} |
1043 |
|
1044 |
int vmstate_register(int instance_id, const VMStateDescription *vmsd, |
1045 |
void *opaque)
|
1046 |
{ |
1047 |
SaveStateEntry *se; |
1048 |
|
1049 |
se = qemu_malloc(sizeof(SaveStateEntry));
|
1050 |
pstrcpy(se->idstr, sizeof(se->idstr), vmsd->name);
|
1051 |
se->version_id = vmsd->version_id; |
1052 |
se->section_id = global_section_id++; |
1053 |
se->save_live_state = NULL;
|
1054 |
se->save_state = NULL;
|
1055 |
se->load_state = NULL;
|
1056 |
se->opaque = opaque; |
1057 |
se->vmsd = vmsd; |
1058 |
|
1059 |
if (instance_id == -1) { |
1060 |
se->instance_id = calculate_new_instance_id(vmsd->name); |
1061 |
} else {
|
1062 |
se->instance_id = instance_id; |
1063 |
} |
1064 |
/* add at the end of list */
|
1065 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1066 |
return 0; |
1067 |
} |
1068 |
|
1069 |
void vmstate_unregister(const VMStateDescription *vmsd, void *opaque) |
1070 |
{ |
1071 |
SaveStateEntry *se, *new_se; |
1072 |
|
1073 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1074 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1075 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1076 |
qemu_free(se); |
1077 |
} |
1078 |
} |
1079 |
} |
1080 |
|
1081 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1082 |
void *opaque, int version_id) |
1083 |
{ |
1084 |
VMStateField *field = vmsd->fields; |
1085 |
|
1086 |
if (version_id > vmsd->version_id) {
|
1087 |
return -EINVAL;
|
1088 |
} |
1089 |
if (version_id < vmsd->minimum_version_id_old) {
|
1090 |
return -EINVAL;
|
1091 |
} |
1092 |
if (version_id < vmsd->minimum_version_id) {
|
1093 |
return vmsd->load_state_old(f, opaque, version_id);
|
1094 |
} |
1095 |
if (vmsd->pre_load) {
|
1096 |
int ret = vmsd->pre_load(opaque);
|
1097 |
if (ret)
|
1098 |
return ret;
|
1099 |
} |
1100 |
while(field->name) {
|
1101 |
if ((field->field_exists &&
|
1102 |
field->field_exists(opaque, version_id)) || |
1103 |
(!field->field_exists && |
1104 |
field->version_id <= version_id)) { |
1105 |
void *base_addr = opaque + field->offset;
|
1106 |
int ret, i, n_elems = 1; |
1107 |
|
1108 |
if (field->flags & VMS_ARRAY) {
|
1109 |
n_elems = field->num; |
1110 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1111 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1112 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1113 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1114 |
} |
1115 |
if (field->flags & VMS_POINTER) {
|
1116 |
base_addr = *(void **)base_addr;
|
1117 |
} |
1118 |
for (i = 0; i < n_elems; i++) { |
1119 |
void *addr = base_addr + field->size * i;
|
1120 |
|
1121 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1122 |
addr = *(void **)addr;
|
1123 |
} |
1124 |
if (field->flags & VMS_STRUCT) {
|
1125 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1126 |
} else {
|
1127 |
ret = field->info->get(f, addr, field->size); |
1128 |
|
1129 |
} |
1130 |
if (ret < 0) { |
1131 |
return ret;
|
1132 |
} |
1133 |
} |
1134 |
} |
1135 |
field++; |
1136 |
} |
1137 |
if (vmsd->post_load) {
|
1138 |
return vmsd->post_load(opaque, version_id);
|
1139 |
} |
1140 |
return 0; |
1141 |
} |
1142 |
|
1143 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1144 |
void *opaque)
|
1145 |
{ |
1146 |
VMStateField *field = vmsd->fields; |
1147 |
|
1148 |
if (vmsd->pre_save) {
|
1149 |
vmsd->pre_save(opaque); |
1150 |
} |
1151 |
while(field->name) {
|
1152 |
if (!field->field_exists ||
|
1153 |
field->field_exists(opaque, vmsd->version_id)) { |
1154 |
void *base_addr = opaque + field->offset;
|
1155 |
int i, n_elems = 1; |
1156 |
|
1157 |
if (field->flags & VMS_ARRAY) {
|
1158 |
n_elems = field->num; |
1159 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1160 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1161 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1162 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1163 |
} |
1164 |
if (field->flags & VMS_POINTER) {
|
1165 |
base_addr = *(void **)base_addr;
|
1166 |
} |
1167 |
for (i = 0; i < n_elems; i++) { |
1168 |
void *addr = base_addr + field->size * i;
|
1169 |
|
1170 |
if (field->flags & VMS_STRUCT) {
|
1171 |
vmstate_save_state(f, field->vmsd, addr); |
1172 |
} else {
|
1173 |
field->info->put(f, addr, field->size); |
1174 |
} |
1175 |
} |
1176 |
} |
1177 |
field++; |
1178 |
} |
1179 |
if (vmsd->post_save) {
|
1180 |
vmsd->post_save(opaque); |
1181 |
} |
1182 |
} |
1183 |
|
1184 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1185 |
{ |
1186 |
if (!se->vmsd) { /* Old style */ |
1187 |
return se->load_state(f, se->opaque, version_id);
|
1188 |
} |
1189 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1190 |
} |
1191 |
|
1192 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1193 |
{ |
1194 |
if (!se->vmsd) { /* Old style */ |
1195 |
se->save_state(f, se->opaque); |
1196 |
return;
|
1197 |
} |
1198 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1199 |
} |
1200 |
|
1201 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1202 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1203 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1204 |
|
1205 |
#define QEMU_VM_EOF 0x00 |
1206 |
#define QEMU_VM_SECTION_START 0x01 |
1207 |
#define QEMU_VM_SECTION_PART 0x02 |
1208 |
#define QEMU_VM_SECTION_END 0x03 |
1209 |
#define QEMU_VM_SECTION_FULL 0x04 |
1210 |
|
1211 |
int qemu_savevm_state_begin(QEMUFile *f)
|
1212 |
{ |
1213 |
SaveStateEntry *se; |
1214 |
|
1215 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1216 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1217 |
|
1218 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1219 |
int len;
|
1220 |
|
1221 |
if (se->save_live_state == NULL) |
1222 |
continue;
|
1223 |
|
1224 |
/* Section type */
|
1225 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1226 |
qemu_put_be32(f, se->section_id); |
1227 |
|
1228 |
/* ID string */
|
1229 |
len = strlen(se->idstr); |
1230 |
qemu_put_byte(f, len); |
1231 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1232 |
|
1233 |
qemu_put_be32(f, se->instance_id); |
1234 |
qemu_put_be32(f, se->version_id); |
1235 |
|
1236 |
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque); |
1237 |
} |
1238 |
|
1239 |
if (qemu_file_has_error(f))
|
1240 |
return -EIO;
|
1241 |
|
1242 |
return 0; |
1243 |
} |
1244 |
|
1245 |
int qemu_savevm_state_iterate(QEMUFile *f)
|
1246 |
{ |
1247 |
SaveStateEntry *se; |
1248 |
int ret = 1; |
1249 |
|
1250 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1251 |
if (se->save_live_state == NULL) |
1252 |
continue;
|
1253 |
|
1254 |
/* Section type */
|
1255 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1256 |
qemu_put_be32(f, se->section_id); |
1257 |
|
1258 |
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque); |
1259 |
} |
1260 |
|
1261 |
if (ret)
|
1262 |
return 1; |
1263 |
|
1264 |
if (qemu_file_has_error(f))
|
1265 |
return -EIO;
|
1266 |
|
1267 |
return 0; |
1268 |
} |
1269 |
|
1270 |
int qemu_savevm_state_complete(QEMUFile *f)
|
1271 |
{ |
1272 |
SaveStateEntry *se; |
1273 |
|
1274 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1275 |
if (se->save_live_state == NULL) |
1276 |
continue;
|
1277 |
|
1278 |
/* Section type */
|
1279 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1280 |
qemu_put_be32(f, se->section_id); |
1281 |
|
1282 |
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque); |
1283 |
} |
1284 |
|
1285 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1286 |
int len;
|
1287 |
|
1288 |
if (se->save_state == NULL && se->vmsd == NULL) |
1289 |
continue;
|
1290 |
|
1291 |
/* Section type */
|
1292 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1293 |
qemu_put_be32(f, se->section_id); |
1294 |
|
1295 |
/* ID string */
|
1296 |
len = strlen(se->idstr); |
1297 |
qemu_put_byte(f, len); |
1298 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1299 |
|
1300 |
qemu_put_be32(f, se->instance_id); |
1301 |
qemu_put_be32(f, se->version_id); |
1302 |
|
1303 |
vmstate_save(f, se); |
1304 |
} |
1305 |
|
1306 |
qemu_put_byte(f, QEMU_VM_EOF); |
1307 |
|
1308 |
if (qemu_file_has_error(f))
|
1309 |
return -EIO;
|
1310 |
|
1311 |
return 0; |
1312 |
} |
1313 |
|
1314 |
int qemu_savevm_state(QEMUFile *f)
|
1315 |
{ |
1316 |
int saved_vm_running;
|
1317 |
int ret;
|
1318 |
|
1319 |
saved_vm_running = vm_running; |
1320 |
vm_stop(0);
|
1321 |
|
1322 |
bdrv_flush_all(); |
1323 |
|
1324 |
ret = qemu_savevm_state_begin(f); |
1325 |
if (ret < 0) |
1326 |
goto out;
|
1327 |
|
1328 |
do {
|
1329 |
ret = qemu_savevm_state_iterate(f); |
1330 |
if (ret < 0) |
1331 |
goto out;
|
1332 |
} while (ret == 0); |
1333 |
|
1334 |
ret = qemu_savevm_state_complete(f); |
1335 |
|
1336 |
out:
|
1337 |
if (qemu_file_has_error(f))
|
1338 |
ret = -EIO; |
1339 |
|
1340 |
if (!ret && saved_vm_running)
|
1341 |
vm_start(); |
1342 |
|
1343 |
return ret;
|
1344 |
} |
1345 |
|
1346 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1347 |
{ |
1348 |
SaveStateEntry *se; |
1349 |
|
1350 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1351 |
if (!strcmp(se->idstr, idstr) &&
|
1352 |
instance_id == se->instance_id) |
1353 |
return se;
|
1354 |
} |
1355 |
return NULL; |
1356 |
} |
1357 |
|
1358 |
typedef struct LoadStateEntry { |
1359 |
QLIST_ENTRY(LoadStateEntry) entry; |
1360 |
SaveStateEntry *se; |
1361 |
int section_id;
|
1362 |
int version_id;
|
1363 |
} LoadStateEntry; |
1364 |
|
1365 |
int qemu_loadvm_state(QEMUFile *f)
|
1366 |
{ |
1367 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1368 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1369 |
LoadStateEntry *le, *new_le; |
1370 |
uint8_t section_type; |
1371 |
unsigned int v; |
1372 |
int ret;
|
1373 |
|
1374 |
v = qemu_get_be32(f); |
1375 |
if (v != QEMU_VM_FILE_MAGIC)
|
1376 |
return -EINVAL;
|
1377 |
|
1378 |
v = qemu_get_be32(f); |
1379 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1380 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1381 |
return -ENOTSUP;
|
1382 |
} |
1383 |
if (v != QEMU_VM_FILE_VERSION)
|
1384 |
return -ENOTSUP;
|
1385 |
|
1386 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1387 |
uint32_t instance_id, version_id, section_id; |
1388 |
SaveStateEntry *se; |
1389 |
char idstr[257]; |
1390 |
int len;
|
1391 |
|
1392 |
switch (section_type) {
|
1393 |
case QEMU_VM_SECTION_START:
|
1394 |
case QEMU_VM_SECTION_FULL:
|
1395 |
/* Read section start */
|
1396 |
section_id = qemu_get_be32(f); |
1397 |
len = qemu_get_byte(f); |
1398 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1399 |
idstr[len] = 0;
|
1400 |
instance_id = qemu_get_be32(f); |
1401 |
version_id = qemu_get_be32(f); |
1402 |
|
1403 |
/* Find savevm section */
|
1404 |
se = find_se(idstr, instance_id); |
1405 |
if (se == NULL) { |
1406 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1407 |
ret = -EINVAL; |
1408 |
goto out;
|
1409 |
} |
1410 |
|
1411 |
/* Validate version */
|
1412 |
if (version_id > se->version_id) {
|
1413 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1414 |
version_id, idstr, se->version_id); |
1415 |
ret = -EINVAL; |
1416 |
goto out;
|
1417 |
} |
1418 |
|
1419 |
/* Add entry */
|
1420 |
le = qemu_mallocz(sizeof(*le));
|
1421 |
|
1422 |
le->se = se; |
1423 |
le->section_id = section_id; |
1424 |
le->version_id = version_id; |
1425 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1426 |
|
1427 |
ret = vmstate_load(f, le->se, le->version_id); |
1428 |
if (ret < 0) { |
1429 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1430 |
instance_id, idstr); |
1431 |
goto out;
|
1432 |
} |
1433 |
break;
|
1434 |
case QEMU_VM_SECTION_PART:
|
1435 |
case QEMU_VM_SECTION_END:
|
1436 |
section_id = qemu_get_be32(f); |
1437 |
|
1438 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1439 |
if (le->section_id == section_id) {
|
1440 |
break;
|
1441 |
} |
1442 |
} |
1443 |
if (le == NULL) { |
1444 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1445 |
ret = -EINVAL; |
1446 |
goto out;
|
1447 |
} |
1448 |
|
1449 |
ret = vmstate_load(f, le->se, le->version_id); |
1450 |
if (ret < 0) { |
1451 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1452 |
section_id); |
1453 |
goto out;
|
1454 |
} |
1455 |
break;
|
1456 |
default:
|
1457 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1458 |
ret = -EINVAL; |
1459 |
goto out;
|
1460 |
} |
1461 |
} |
1462 |
|
1463 |
ret = 0;
|
1464 |
|
1465 |
out:
|
1466 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1467 |
QLIST_REMOVE(le, entry); |
1468 |
qemu_free(le); |
1469 |
} |
1470 |
|
1471 |
if (qemu_file_has_error(f))
|
1472 |
ret = -EIO; |
1473 |
|
1474 |
return ret;
|
1475 |
} |
1476 |
|
1477 |
/* device can contain snapshots */
|
1478 |
static int bdrv_can_snapshot(BlockDriverState *bs) |
1479 |
{ |
1480 |
return (bs &&
|
1481 |
!bdrv_is_removable(bs) && |
1482 |
!bdrv_is_read_only(bs)); |
1483 |
} |
1484 |
|
1485 |
/* device must be snapshots in order to have a reliable snapshot */
|
1486 |
static int bdrv_has_snapshot(BlockDriverState *bs) |
1487 |
{ |
1488 |
return (bs &&
|
1489 |
!bdrv_is_removable(bs) && |
1490 |
!bdrv_is_read_only(bs)); |
1491 |
} |
1492 |
|
1493 |
static BlockDriverState *get_bs_snapshots(void) |
1494 |
{ |
1495 |
BlockDriverState *bs; |
1496 |
DriveInfo *dinfo; |
1497 |
|
1498 |
if (bs_snapshots)
|
1499 |
return bs_snapshots;
|
1500 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1501 |
bs = dinfo->bdrv; |
1502 |
if (bdrv_can_snapshot(bs))
|
1503 |
goto ok;
|
1504 |
} |
1505 |
return NULL; |
1506 |
ok:
|
1507 |
bs_snapshots = bs; |
1508 |
return bs;
|
1509 |
} |
1510 |
|
1511 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1512 |
const char *name) |
1513 |
{ |
1514 |
QEMUSnapshotInfo *sn_tab, *sn; |
1515 |
int nb_sns, i, ret;
|
1516 |
|
1517 |
ret = -ENOENT; |
1518 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1519 |
if (nb_sns < 0) |
1520 |
return ret;
|
1521 |
for(i = 0; i < nb_sns; i++) { |
1522 |
sn = &sn_tab[i]; |
1523 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1524 |
*sn_info = *sn; |
1525 |
ret = 0;
|
1526 |
break;
|
1527 |
} |
1528 |
} |
1529 |
qemu_free(sn_tab); |
1530 |
return ret;
|
1531 |
} |
1532 |
|
1533 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1534 |
{ |
1535 |
DriveInfo *dinfo; |
1536 |
BlockDriverState *bs, *bs1; |
1537 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1538 |
int must_delete, ret;
|
1539 |
QEMUFile *f; |
1540 |
int saved_vm_running;
|
1541 |
uint32_t vm_state_size; |
1542 |
#ifdef _WIN32
|
1543 |
struct _timeb tb;
|
1544 |
#else
|
1545 |
struct timeval tv;
|
1546 |
#endif
|
1547 |
const char *name = qdict_get_try_str(qdict, "name"); |
1548 |
|
1549 |
bs = get_bs_snapshots(); |
1550 |
if (!bs) {
|
1551 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1552 |
return;
|
1553 |
} |
1554 |
|
1555 |
/* ??? Should this occur after vm_stop? */
|
1556 |
qemu_aio_flush(); |
1557 |
|
1558 |
saved_vm_running = vm_running; |
1559 |
vm_stop(0);
|
1560 |
|
1561 |
must_delete = 0;
|
1562 |
if (name) {
|
1563 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
1564 |
if (ret >= 0) { |
1565 |
must_delete = 1;
|
1566 |
} |
1567 |
} |
1568 |
memset(sn, 0, sizeof(*sn)); |
1569 |
if (must_delete) {
|
1570 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
1571 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
1572 |
} else {
|
1573 |
if (name)
|
1574 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1575 |
} |
1576 |
|
1577 |
/* fill auxiliary fields */
|
1578 |
#ifdef _WIN32
|
1579 |
_ftime(&tb); |
1580 |
sn->date_sec = tb.time; |
1581 |
sn->date_nsec = tb.millitm * 1000000;
|
1582 |
#else
|
1583 |
gettimeofday(&tv, NULL);
|
1584 |
sn->date_sec = tv.tv_sec; |
1585 |
sn->date_nsec = tv.tv_usec * 1000;
|
1586 |
#endif
|
1587 |
sn->vm_clock_nsec = qemu_get_clock(vm_clock); |
1588 |
|
1589 |
/* save the VM state */
|
1590 |
f = qemu_fopen_bdrv(bs, 1);
|
1591 |
if (!f) {
|
1592 |
monitor_printf(mon, "Could not open VM state file\n");
|
1593 |
goto the_end;
|
1594 |
} |
1595 |
ret = qemu_savevm_state(f); |
1596 |
vm_state_size = qemu_ftell(f); |
1597 |
qemu_fclose(f); |
1598 |
if (ret < 0) { |
1599 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
1600 |
goto the_end;
|
1601 |
} |
1602 |
|
1603 |
/* create the snapshots */
|
1604 |
|
1605 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1606 |
bs1 = dinfo->bdrv; |
1607 |
if (bdrv_has_snapshot(bs1)) {
|
1608 |
if (must_delete) {
|
1609 |
ret = bdrv_snapshot_delete(bs1, old_sn->id_str); |
1610 |
if (ret < 0) { |
1611 |
monitor_printf(mon, |
1612 |
"Error while deleting snapshot on '%s'\n",
|
1613 |
bdrv_get_device_name(bs1)); |
1614 |
} |
1615 |
} |
1616 |
/* Write VM state size only to the image that contains the state */
|
1617 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
1618 |
ret = bdrv_snapshot_create(bs1, sn); |
1619 |
if (ret < 0) { |
1620 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
1621 |
bdrv_get_device_name(bs1)); |
1622 |
} |
1623 |
} |
1624 |
} |
1625 |
|
1626 |
the_end:
|
1627 |
if (saved_vm_running)
|
1628 |
vm_start(); |
1629 |
} |
1630 |
|
1631 |
int load_vmstate(Monitor *mon, const char *name) |
1632 |
{ |
1633 |
DriveInfo *dinfo; |
1634 |
BlockDriverState *bs, *bs1; |
1635 |
QEMUSnapshotInfo sn; |
1636 |
QEMUFile *f; |
1637 |
int ret;
|
1638 |
|
1639 |
bs = get_bs_snapshots(); |
1640 |
if (!bs) {
|
1641 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1642 |
return -EINVAL;
|
1643 |
} |
1644 |
|
1645 |
/* Flush all IO requests so they don't interfere with the new state. */
|
1646 |
qemu_aio_flush(); |
1647 |
|
1648 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1649 |
bs1 = dinfo->bdrv; |
1650 |
if (bdrv_has_snapshot(bs1)) {
|
1651 |
ret = bdrv_snapshot_goto(bs1, name); |
1652 |
if (ret < 0) { |
1653 |
if (bs != bs1)
|
1654 |
monitor_printf(mon, "Warning: ");
|
1655 |
switch(ret) {
|
1656 |
case -ENOTSUP:
|
1657 |
monitor_printf(mon, |
1658 |
"Snapshots not supported on device '%s'\n",
|
1659 |
bdrv_get_device_name(bs1)); |
1660 |
break;
|
1661 |
case -ENOENT:
|
1662 |
monitor_printf(mon, "Could not find snapshot '%s' on "
|
1663 |
"device '%s'\n",
|
1664 |
name, bdrv_get_device_name(bs1)); |
1665 |
break;
|
1666 |
default:
|
1667 |
monitor_printf(mon, "Error %d while activating snapshot on"
|
1668 |
" '%s'\n", ret, bdrv_get_device_name(bs1));
|
1669 |
break;
|
1670 |
} |
1671 |
/* fatal on snapshot block device */
|
1672 |
if (bs == bs1)
|
1673 |
return 0; |
1674 |
} |
1675 |
} |
1676 |
} |
1677 |
|
1678 |
/* Don't even try to load empty VM states */
|
1679 |
ret = bdrv_snapshot_find(bs, &sn, name); |
1680 |
if ((ret >= 0) && (sn.vm_state_size == 0)) |
1681 |
return -EINVAL;
|
1682 |
|
1683 |
/* restore the VM state */
|
1684 |
f = qemu_fopen_bdrv(bs, 0);
|
1685 |
if (!f) {
|
1686 |
monitor_printf(mon, "Could not open VM state file\n");
|
1687 |
return -EINVAL;
|
1688 |
} |
1689 |
ret = qemu_loadvm_state(f); |
1690 |
qemu_fclose(f); |
1691 |
if (ret < 0) { |
1692 |
monitor_printf(mon, "Error %d while loading VM state\n", ret);
|
1693 |
return ret;
|
1694 |
} |
1695 |
return 0; |
1696 |
} |
1697 |
|
1698 |
void do_delvm(Monitor *mon, const QDict *qdict) |
1699 |
{ |
1700 |
DriveInfo *dinfo; |
1701 |
BlockDriverState *bs, *bs1; |
1702 |
int ret;
|
1703 |
const char *name = qdict_get_str(qdict, "name"); |
1704 |
|
1705 |
bs = get_bs_snapshots(); |
1706 |
if (!bs) {
|
1707 |
monitor_printf(mon, "No block device supports snapshots\n");
|
1708 |
return;
|
1709 |
} |
1710 |
|
1711 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1712 |
bs1 = dinfo->bdrv; |
1713 |
if (bdrv_has_snapshot(bs1)) {
|
1714 |
ret = bdrv_snapshot_delete(bs1, name); |
1715 |
if (ret < 0) { |
1716 |
if (ret == -ENOTSUP)
|
1717 |
monitor_printf(mon, |
1718 |
"Snapshots not supported on device '%s'\n",
|
1719 |
bdrv_get_device_name(bs1)); |
1720 |
else
|
1721 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
1722 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
1723 |
} |
1724 |
} |
1725 |
} |
1726 |
} |
1727 |
|
1728 |
void do_info_snapshots(Monitor *mon)
|
1729 |
{ |
1730 |
DriveInfo *dinfo; |
1731 |
BlockDriverState *bs, *bs1; |
1732 |
QEMUSnapshotInfo *sn_tab, *sn; |
1733 |
int nb_sns, i;
|
1734 |
char buf[256]; |
1735 |
|
1736 |
bs = get_bs_snapshots(); |
1737 |
if (!bs) {
|
1738 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
1739 |
return;
|
1740 |
} |
1741 |
monitor_printf(mon, "Snapshot devices:");
|
1742 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
1743 |
bs1 = dinfo->bdrv; |
1744 |
if (bdrv_has_snapshot(bs1)) {
|
1745 |
if (bs == bs1)
|
1746 |
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));
|
1747 |
} |
1748 |
} |
1749 |
monitor_printf(mon, "\n");
|
1750 |
|
1751 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1752 |
if (nb_sns < 0) { |
1753 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
1754 |
return;
|
1755 |
} |
1756 |
monitor_printf(mon, "Snapshot list (from %s):\n",
|
1757 |
bdrv_get_device_name(bs)); |
1758 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1759 |
for(i = 0; i < nb_sns; i++) { |
1760 |
sn = &sn_tab[i]; |
1761 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1762 |
} |
1763 |
qemu_free(sn_tab); |
1764 |
} |