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/*
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* QEMU disk image utility
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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 "qapi-visit.h" |
25 |
#include "qapi/qmp-output-visitor.h" |
26 |
#include "qjson.h" |
27 |
#include "qemu-common.h" |
28 |
#include "qemu-option.h" |
29 |
#include "qemu-error.h" |
30 |
#include "osdep.h" |
31 |
#include "sysemu.h" |
32 |
#include "block_int.h" |
33 |
#include <getopt.h> |
34 |
#include <stdio.h> |
35 |
|
36 |
#ifdef _WIN32
|
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#include <windows.h> |
38 |
#endif
|
39 |
|
40 |
typedef struct img_cmd_t { |
41 |
const char *name; |
42 |
int (*handler)(int argc, char **argv); |
43 |
} img_cmd_t; |
44 |
|
45 |
/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
|
46 |
#define BDRV_O_FLAGS BDRV_O_CACHE_WB
|
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#define BDRV_DEFAULT_CACHE "writeback" |
48 |
|
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static void format_print(void *opaque, const char *name) |
50 |
{ |
51 |
printf(" %s", name);
|
52 |
} |
53 |
|
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/* Please keep in synch with qemu-img.texi */
|
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static void help(void) |
56 |
{ |
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const char *help_msg = |
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"qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" |
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"usage: qemu-img command [command options]\n"
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"QEMU disk image utility\n"
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"\n"
|
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"Command syntax:\n"
|
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#define DEF(option, callback, arg_string) \
|
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" " arg_string "\n" |
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#include "qemu-img-cmds.h" |
66 |
#undef DEF
|
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#undef GEN_DOCS
|
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"\n"
|
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"Command parameters:\n"
|
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" 'filename' is a disk image filename\n"
|
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" 'fmt' is the disk image format. It is guessed automatically in most cases\n"
|
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" 'cache' is the cache mode used to write the output disk image, the valid\n"
|
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" options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
|
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" 'directsync' and 'unsafe' (default for convert)\n"
|
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" 'size' is the disk image size in bytes. Optional suffixes\n"
|
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" 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n"
|
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" and T (terabyte, 1024G) are supported. 'b' is ignored.\n"
|
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" 'output_filename' is the destination disk image filename\n"
|
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" 'output_fmt' is the destination format\n"
|
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" 'options' is a comma separated list of format specific options in a\n"
|
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" name=value format. Use -o ? for an overview of the options supported by the\n"
|
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" used format\n"
|
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" '-c' indicates that target image must be compressed (qcow format only)\n"
|
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" '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
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" match exactly. The image doesn't need a working backing file before\n"
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" rebasing in this case (useful for renaming the backing file)\n"
|
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" '-h' with or without a command shows this help and lists the supported formats\n"
|
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" '-p' show progress of command (only certain commands)\n"
|
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" '-S' indicates the consecutive number of bytes that must contain only zeros\n"
|
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" for qemu-img to create a sparse image during conversion\n"
|
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" '--output' takes the format in which the output must be done (human or json)\n"
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"\n"
|
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"Parameters to check subcommand:\n"
|
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" '-r' tries to repair any inconsistencies that are found during the check.\n"
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" '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
|
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" kinds of errors, with a higher risk of choosing the wrong fix or\n"
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" hiding corruption that has already occured.\n"
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"\n"
|
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"Parameters to snapshot subcommand:\n"
|
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" 'snapshot' is the name of the snapshot to create, apply or delete\n"
|
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" '-a' applies a snapshot (revert disk to saved state)\n"
|
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" '-c' creates a snapshot\n"
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" '-d' deletes a snapshot\n"
|
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" '-l' lists all snapshots in the given image\n";
|
105 |
|
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printf("%s\nSupported formats:", help_msg);
|
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bdrv_iterate_format(format_print, NULL);
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printf("\n");
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exit(1);
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} |
111 |
|
112 |
#if defined(WIN32)
|
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/* XXX: put correct support for win32 */
|
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static int read_password(char *buf, int buf_size) |
115 |
{ |
116 |
int c, i;
|
117 |
printf("Password: ");
|
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fflush(stdout); |
119 |
i = 0;
|
120 |
for(;;) {
|
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c = getchar(); |
122 |
if (c == '\n') |
123 |
break;
|
124 |
if (i < (buf_size - 1)) |
125 |
buf[i++] = c; |
126 |
} |
127 |
buf[i] = '\0';
|
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return 0; |
129 |
} |
130 |
|
131 |
#else
|
132 |
|
133 |
#include <termios.h> |
134 |
|
135 |
static struct termios oldtty; |
136 |
|
137 |
static void term_exit(void) |
138 |
{ |
139 |
tcsetattr (0, TCSANOW, &oldtty);
|
140 |
} |
141 |
|
142 |
static void term_init(void) |
143 |
{ |
144 |
struct termios tty;
|
145 |
|
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tcgetattr (0, &tty);
|
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oldtty = tty; |
148 |
|
149 |
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
150 |
|INLCR|IGNCR|ICRNL|IXON); |
151 |
tty.c_oflag |= OPOST; |
152 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
153 |
tty.c_cflag &= ~(CSIZE|PARENB); |
154 |
tty.c_cflag |= CS8; |
155 |
tty.c_cc[VMIN] = 1;
|
156 |
tty.c_cc[VTIME] = 0;
|
157 |
|
158 |
tcsetattr (0, TCSANOW, &tty);
|
159 |
|
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atexit(term_exit); |
161 |
} |
162 |
|
163 |
static int read_password(char *buf, int buf_size) |
164 |
{ |
165 |
uint8_t ch; |
166 |
int i, ret;
|
167 |
|
168 |
printf("password: ");
|
169 |
fflush(stdout); |
170 |
term_init(); |
171 |
i = 0;
|
172 |
for(;;) {
|
173 |
ret = read(0, &ch, 1); |
174 |
if (ret == -1) { |
175 |
if (errno == EAGAIN || errno == EINTR) {
|
176 |
continue;
|
177 |
} else {
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178 |
ret = -1;
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179 |
break;
|
180 |
} |
181 |
} else if (ret == 0) { |
182 |
ret = -1;
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183 |
break;
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184 |
} else {
|
185 |
if (ch == '\r') { |
186 |
ret = 0;
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187 |
break;
|
188 |
} |
189 |
if (i < (buf_size - 1)) |
190 |
buf[i++] = ch; |
191 |
} |
192 |
} |
193 |
term_exit(); |
194 |
buf[i] = '\0';
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printf("\n");
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return ret;
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} |
198 |
#endif
|
199 |
|
200 |
static int print_block_option_help(const char *filename, const char *fmt) |
201 |
{ |
202 |
BlockDriver *drv, *proto_drv; |
203 |
QEMUOptionParameter *create_options = NULL;
|
204 |
|
205 |
/* Find driver and parse its options */
|
206 |
drv = bdrv_find_format(fmt); |
207 |
if (!drv) {
|
208 |
error_report("Unknown file format '%s'", fmt);
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209 |
return 1; |
210 |
} |
211 |
|
212 |
proto_drv = bdrv_find_protocol(filename); |
213 |
if (!proto_drv) {
|
214 |
error_report("Unknown protocol '%s'", filename);
|
215 |
return 1; |
216 |
} |
217 |
|
218 |
create_options = append_option_parameters(create_options, |
219 |
drv->create_options); |
220 |
create_options = append_option_parameters(create_options, |
221 |
proto_drv->create_options); |
222 |
print_option_help(create_options); |
223 |
free_option_parameters(create_options); |
224 |
return 0; |
225 |
} |
226 |
|
227 |
static BlockDriverState *bdrv_new_open(const char *filename, |
228 |
const char *fmt, |
229 |
int flags)
|
230 |
{ |
231 |
BlockDriverState *bs; |
232 |
BlockDriver *drv; |
233 |
char password[256]; |
234 |
int ret;
|
235 |
|
236 |
bs = bdrv_new("image");
|
237 |
|
238 |
if (fmt) {
|
239 |
drv = bdrv_find_format(fmt); |
240 |
if (!drv) {
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241 |
error_report("Unknown file format '%s'", fmt);
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242 |
goto fail;
|
243 |
} |
244 |
} else {
|
245 |
drv = NULL;
|
246 |
} |
247 |
|
248 |
ret = bdrv_open(bs, filename, flags, drv); |
249 |
if (ret < 0) { |
250 |
error_report("Could not open '%s': %s", filename, strerror(-ret));
|
251 |
goto fail;
|
252 |
} |
253 |
|
254 |
if (bdrv_is_encrypted(bs)) {
|
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printf("Disk image '%s' is encrypted.\n", filename);
|
256 |
if (read_password(password, sizeof(password)) < 0) { |
257 |
error_report("No password given");
|
258 |
goto fail;
|
259 |
} |
260 |
if (bdrv_set_key(bs, password) < 0) { |
261 |
error_report("invalid password");
|
262 |
goto fail;
|
263 |
} |
264 |
} |
265 |
return bs;
|
266 |
fail:
|
267 |
if (bs) {
|
268 |
bdrv_delete(bs); |
269 |
} |
270 |
return NULL; |
271 |
} |
272 |
|
273 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
274 |
const char *base_filename, |
275 |
const char *base_fmt) |
276 |
{ |
277 |
if (base_filename) {
|
278 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
|
279 |
error_report("Backing file not supported for file format '%s'",
|
280 |
fmt); |
281 |
return -1; |
282 |
} |
283 |
} |
284 |
if (base_fmt) {
|
285 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
286 |
error_report("Backing file format not supported for file "
|
287 |
"format '%s'", fmt);
|
288 |
return -1; |
289 |
} |
290 |
} |
291 |
return 0; |
292 |
} |
293 |
|
294 |
static int img_create(int argc, char **argv) |
295 |
{ |
296 |
int c, ret = 0; |
297 |
uint64_t img_size = -1;
|
298 |
const char *fmt = "raw"; |
299 |
const char *base_fmt = NULL; |
300 |
const char *filename; |
301 |
const char *base_filename = NULL; |
302 |
char *options = NULL; |
303 |
|
304 |
for(;;) {
|
305 |
c = getopt(argc, argv, "F:b:f:he6o:");
|
306 |
if (c == -1) { |
307 |
break;
|
308 |
} |
309 |
switch(c) {
|
310 |
case '?': |
311 |
case 'h': |
312 |
help(); |
313 |
break;
|
314 |
case 'F': |
315 |
base_fmt = optarg; |
316 |
break;
|
317 |
case 'b': |
318 |
base_filename = optarg; |
319 |
break;
|
320 |
case 'f': |
321 |
fmt = optarg; |
322 |
break;
|
323 |
case 'e': |
324 |
error_report("option -e is deprecated, please use \'-o "
|
325 |
"encryption\' instead!");
|
326 |
return 1; |
327 |
case '6': |
328 |
error_report("option -6 is deprecated, please use \'-o "
|
329 |
"compat6\' instead!");
|
330 |
return 1; |
331 |
case 'o': |
332 |
options = optarg; |
333 |
break;
|
334 |
} |
335 |
} |
336 |
|
337 |
/* Get the filename */
|
338 |
if (optind >= argc) {
|
339 |
help(); |
340 |
} |
341 |
filename = argv[optind++]; |
342 |
|
343 |
/* Get image size, if specified */
|
344 |
if (optind < argc) {
|
345 |
int64_t sval; |
346 |
char *end;
|
347 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
348 |
if (sval < 0 || *end) { |
349 |
error_report("Invalid image size specified! You may use k, M, G or "
|
350 |
"T suffixes for ");
|
351 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
352 |
ret = -1;
|
353 |
goto out;
|
354 |
} |
355 |
img_size = (uint64_t)sval; |
356 |
} |
357 |
|
358 |
if (options && is_help_option(options)) {
|
359 |
ret = print_block_option_help(filename, fmt); |
360 |
goto out;
|
361 |
} |
362 |
|
363 |
ret = bdrv_img_create(filename, fmt, base_filename, base_fmt, |
364 |
options, img_size, BDRV_O_FLAGS); |
365 |
out:
|
366 |
if (ret) {
|
367 |
return 1; |
368 |
} |
369 |
return 0; |
370 |
} |
371 |
|
372 |
/*
|
373 |
* Checks an image for consistency. Exit codes:
|
374 |
*
|
375 |
* 0 - Check completed, image is good
|
376 |
* 1 - Check not completed because of internal errors
|
377 |
* 2 - Check completed, image is corrupted
|
378 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
379 |
*/
|
380 |
static int img_check(int argc, char **argv) |
381 |
{ |
382 |
int c, ret;
|
383 |
const char *filename, *fmt; |
384 |
BlockDriverState *bs; |
385 |
BdrvCheckResult result; |
386 |
int fix = 0; |
387 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
388 |
|
389 |
fmt = NULL;
|
390 |
for(;;) {
|
391 |
c = getopt(argc, argv, "f:hr:");
|
392 |
if (c == -1) { |
393 |
break;
|
394 |
} |
395 |
switch(c) {
|
396 |
case '?': |
397 |
case 'h': |
398 |
help(); |
399 |
break;
|
400 |
case 'f': |
401 |
fmt = optarg; |
402 |
break;
|
403 |
case 'r': |
404 |
flags |= BDRV_O_RDWR; |
405 |
|
406 |
if (!strcmp(optarg, "leaks")) { |
407 |
fix = BDRV_FIX_LEAKS; |
408 |
} else if (!strcmp(optarg, "all")) { |
409 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
410 |
} else {
|
411 |
help(); |
412 |
} |
413 |
break;
|
414 |
} |
415 |
} |
416 |
if (optind >= argc) {
|
417 |
help(); |
418 |
} |
419 |
filename = argv[optind++]; |
420 |
|
421 |
bs = bdrv_new_open(filename, fmt, flags); |
422 |
if (!bs) {
|
423 |
return 1; |
424 |
} |
425 |
ret = bdrv_check(bs, &result, fix); |
426 |
|
427 |
if (ret == -ENOTSUP) {
|
428 |
error_report("This image format does not support checks");
|
429 |
bdrv_delete(bs); |
430 |
return 1; |
431 |
} |
432 |
|
433 |
if (result.corruptions_fixed || result.leaks_fixed) {
|
434 |
printf("The following inconsistencies were found and repaired:\n\n"
|
435 |
" %d leaked clusters\n"
|
436 |
" %d corruptions\n\n"
|
437 |
"Double checking the fixed image now...\n",
|
438 |
result.leaks_fixed, |
439 |
result.corruptions_fixed); |
440 |
ret = bdrv_check(bs, &result, 0);
|
441 |
} |
442 |
|
443 |
if (!(result.corruptions || result.leaks || result.check_errors)) {
|
444 |
printf("No errors were found on the image.\n");
|
445 |
} else {
|
446 |
if (result.corruptions) {
|
447 |
printf("\n%d errors were found on the image.\n"
|
448 |
"Data may be corrupted, or further writes to the image "
|
449 |
"may corrupt it.\n",
|
450 |
result.corruptions); |
451 |
} |
452 |
|
453 |
if (result.leaks) {
|
454 |
printf("\n%d leaked clusters were found on the image.\n"
|
455 |
"This means waste of disk space, but no harm to data.\n",
|
456 |
result.leaks); |
457 |
} |
458 |
|
459 |
if (result.check_errors) {
|
460 |
printf("\n%d internal errors have occurred during the check.\n",
|
461 |
result.check_errors); |
462 |
} |
463 |
} |
464 |
|
465 |
if (result.bfi.total_clusters != 0 && result.bfi.allocated_clusters != 0) { |
466 |
printf("%" PRId64 "/%" PRId64 "= %0.2f%% allocated, %0.2f%% fragmented\n", |
467 |
result.bfi.allocated_clusters, result.bfi.total_clusters, |
468 |
result.bfi.allocated_clusters * 100.0 / result.bfi.total_clusters, |
469 |
result.bfi.fragmented_clusters * 100.0 / result.bfi.allocated_clusters); |
470 |
} |
471 |
|
472 |
bdrv_delete(bs); |
473 |
|
474 |
if (ret < 0 || result.check_errors) { |
475 |
printf("\nAn error has occurred during the check: %s\n"
|
476 |
"The check is not complete and may have missed error.\n",
|
477 |
strerror(-ret)); |
478 |
return 1; |
479 |
} |
480 |
|
481 |
if (result.corruptions) {
|
482 |
return 2; |
483 |
} else if (result.leaks) { |
484 |
return 3; |
485 |
} else {
|
486 |
return 0; |
487 |
} |
488 |
} |
489 |
|
490 |
static int img_commit(int argc, char **argv) |
491 |
{ |
492 |
int c, ret, flags;
|
493 |
const char *filename, *fmt, *cache; |
494 |
BlockDriverState *bs; |
495 |
|
496 |
fmt = NULL;
|
497 |
cache = BDRV_DEFAULT_CACHE; |
498 |
for(;;) {
|
499 |
c = getopt(argc, argv, "f:ht:");
|
500 |
if (c == -1) { |
501 |
break;
|
502 |
} |
503 |
switch(c) {
|
504 |
case '?': |
505 |
case 'h': |
506 |
help(); |
507 |
break;
|
508 |
case 'f': |
509 |
fmt = optarg; |
510 |
break;
|
511 |
case 't': |
512 |
cache = optarg; |
513 |
break;
|
514 |
} |
515 |
} |
516 |
if (optind >= argc) {
|
517 |
help(); |
518 |
} |
519 |
filename = argv[optind++]; |
520 |
|
521 |
flags = BDRV_O_RDWR; |
522 |
ret = bdrv_parse_cache_flags(cache, &flags); |
523 |
if (ret < 0) { |
524 |
error_report("Invalid cache option: %s", cache);
|
525 |
return -1; |
526 |
} |
527 |
|
528 |
bs = bdrv_new_open(filename, fmt, flags); |
529 |
if (!bs) {
|
530 |
return 1; |
531 |
} |
532 |
ret = bdrv_commit(bs); |
533 |
switch(ret) {
|
534 |
case 0: |
535 |
printf("Image committed.\n");
|
536 |
break;
|
537 |
case -ENOENT:
|
538 |
error_report("No disk inserted");
|
539 |
break;
|
540 |
case -EACCES:
|
541 |
error_report("Image is read-only");
|
542 |
break;
|
543 |
case -ENOTSUP:
|
544 |
error_report("Image is already committed");
|
545 |
break;
|
546 |
default:
|
547 |
error_report("Error while committing image");
|
548 |
break;
|
549 |
} |
550 |
|
551 |
bdrv_delete(bs); |
552 |
if (ret) {
|
553 |
return 1; |
554 |
} |
555 |
return 0; |
556 |
} |
557 |
|
558 |
/*
|
559 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
560 |
* a non-NUL byte.
|
561 |
*
|
562 |
* 'pnum' is set to the number of sectors (including and immediately following
|
563 |
* the first one) that are known to be in the same allocated/unallocated state.
|
564 |
*/
|
565 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
566 |
{ |
567 |
bool is_zero;
|
568 |
int i;
|
569 |
|
570 |
if (n <= 0) { |
571 |
*pnum = 0;
|
572 |
return 0; |
573 |
} |
574 |
is_zero = buffer_is_zero(buf, 512);
|
575 |
for(i = 1; i < n; i++) { |
576 |
buf += 512;
|
577 |
if (is_zero != buffer_is_zero(buf, 512)) { |
578 |
break;
|
579 |
} |
580 |
} |
581 |
*pnum = i; |
582 |
return !is_zero;
|
583 |
} |
584 |
|
585 |
/*
|
586 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
587 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
588 |
* breaking up write requests for only small sparse areas.
|
589 |
*/
|
590 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
591 |
int min)
|
592 |
{ |
593 |
int ret;
|
594 |
int num_checked, num_used;
|
595 |
|
596 |
if (n < min) {
|
597 |
min = n; |
598 |
} |
599 |
|
600 |
ret = is_allocated_sectors(buf, n, pnum); |
601 |
if (!ret) {
|
602 |
return ret;
|
603 |
} |
604 |
|
605 |
num_used = *pnum; |
606 |
buf += BDRV_SECTOR_SIZE * *pnum; |
607 |
n -= *pnum; |
608 |
num_checked = num_used; |
609 |
|
610 |
while (n > 0) { |
611 |
ret = is_allocated_sectors(buf, n, pnum); |
612 |
|
613 |
buf += BDRV_SECTOR_SIZE * *pnum; |
614 |
n -= *pnum; |
615 |
num_checked += *pnum; |
616 |
if (ret) {
|
617 |
num_used = num_checked; |
618 |
} else if (*pnum >= min) { |
619 |
break;
|
620 |
} |
621 |
} |
622 |
|
623 |
*pnum = num_used; |
624 |
return 1; |
625 |
} |
626 |
|
627 |
/*
|
628 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
629 |
* buffers matches, non-zero otherwise.
|
630 |
*
|
631 |
* pnum is set to the number of sectors (including and immediately following
|
632 |
* the first one) that are known to have the same comparison result
|
633 |
*/
|
634 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
635 |
int *pnum)
|
636 |
{ |
637 |
int res, i;
|
638 |
|
639 |
if (n <= 0) { |
640 |
*pnum = 0;
|
641 |
return 0; |
642 |
} |
643 |
|
644 |
res = !!memcmp(buf1, buf2, 512);
|
645 |
for(i = 1; i < n; i++) { |
646 |
buf1 += 512;
|
647 |
buf2 += 512;
|
648 |
|
649 |
if (!!memcmp(buf1, buf2, 512) != res) { |
650 |
break;
|
651 |
} |
652 |
} |
653 |
|
654 |
*pnum = i; |
655 |
return res;
|
656 |
} |
657 |
|
658 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
659 |
|
660 |
static int img_convert(int argc, char **argv) |
661 |
{ |
662 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
663 |
int progress = 0, flags; |
664 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
665 |
BlockDriver *drv, *proto_drv; |
666 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
667 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
668 |
uint64_t bs_sectors; |
669 |
uint8_t * buf = NULL;
|
670 |
const uint8_t *buf1;
|
671 |
BlockDriverInfo bdi; |
672 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
673 |
QEMUOptionParameter *out_baseimg_param; |
674 |
char *options = NULL; |
675 |
const char *snapshot_name = NULL; |
676 |
float local_progress;
|
677 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
678 |
|
679 |
fmt = NULL;
|
680 |
out_fmt = "raw";
|
681 |
cache = "unsafe";
|
682 |
out_baseimg = NULL;
|
683 |
compress = 0;
|
684 |
for(;;) {
|
685 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:");
|
686 |
if (c == -1) { |
687 |
break;
|
688 |
} |
689 |
switch(c) {
|
690 |
case '?': |
691 |
case 'h': |
692 |
help(); |
693 |
break;
|
694 |
case 'f': |
695 |
fmt = optarg; |
696 |
break;
|
697 |
case 'O': |
698 |
out_fmt = optarg; |
699 |
break;
|
700 |
case 'B': |
701 |
out_baseimg = optarg; |
702 |
break;
|
703 |
case 'c': |
704 |
compress = 1;
|
705 |
break;
|
706 |
case 'e': |
707 |
error_report("option -e is deprecated, please use \'-o "
|
708 |
"encryption\' instead!");
|
709 |
return 1; |
710 |
case '6': |
711 |
error_report("option -6 is deprecated, please use \'-o "
|
712 |
"compat6\' instead!");
|
713 |
return 1; |
714 |
case 'o': |
715 |
options = optarg; |
716 |
break;
|
717 |
case 's': |
718 |
snapshot_name = optarg; |
719 |
break;
|
720 |
case 'S': |
721 |
{ |
722 |
int64_t sval; |
723 |
char *end;
|
724 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
725 |
if (sval < 0 || *end) { |
726 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
727 |
return 1; |
728 |
} |
729 |
|
730 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
731 |
break;
|
732 |
} |
733 |
case 'p': |
734 |
progress = 1;
|
735 |
break;
|
736 |
case 't': |
737 |
cache = optarg; |
738 |
break;
|
739 |
} |
740 |
} |
741 |
|
742 |
bs_n = argc - optind - 1;
|
743 |
if (bs_n < 1) { |
744 |
help(); |
745 |
} |
746 |
|
747 |
out_filename = argv[argc - 1];
|
748 |
|
749 |
/* Initialize before goto out */
|
750 |
qemu_progress_init(progress, 2.0); |
751 |
|
752 |
if (options && is_help_option(options)) {
|
753 |
ret = print_block_option_help(out_filename, out_fmt); |
754 |
goto out;
|
755 |
} |
756 |
|
757 |
if (bs_n > 1 && out_baseimg) { |
758 |
error_report("-B makes no sense when concatenating multiple input "
|
759 |
"images");
|
760 |
ret = -1;
|
761 |
goto out;
|
762 |
} |
763 |
|
764 |
qemu_progress_print(0, 100); |
765 |
|
766 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
767 |
|
768 |
total_sectors = 0;
|
769 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
770 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
771 |
if (!bs[bs_i]) {
|
772 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
773 |
ret = -1;
|
774 |
goto out;
|
775 |
} |
776 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
777 |
total_sectors += bs_sectors; |
778 |
} |
779 |
|
780 |
if (snapshot_name != NULL) { |
781 |
if (bs_n > 1) { |
782 |
error_report("No support for concatenating multiple snapshot");
|
783 |
ret = -1;
|
784 |
goto out;
|
785 |
} |
786 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
787 |
error_report("Failed to load snapshot");
|
788 |
ret = -1;
|
789 |
goto out;
|
790 |
} |
791 |
} |
792 |
|
793 |
/* Find driver and parse its options */
|
794 |
drv = bdrv_find_format(out_fmt); |
795 |
if (!drv) {
|
796 |
error_report("Unknown file format '%s'", out_fmt);
|
797 |
ret = -1;
|
798 |
goto out;
|
799 |
} |
800 |
|
801 |
proto_drv = bdrv_find_protocol(out_filename); |
802 |
if (!proto_drv) {
|
803 |
error_report("Unknown protocol '%s'", out_filename);
|
804 |
ret = -1;
|
805 |
goto out;
|
806 |
} |
807 |
|
808 |
create_options = append_option_parameters(create_options, |
809 |
drv->create_options); |
810 |
create_options = append_option_parameters(create_options, |
811 |
proto_drv->create_options); |
812 |
|
813 |
if (options) {
|
814 |
param = parse_option_parameters(options, create_options, param); |
815 |
if (param == NULL) { |
816 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
817 |
ret = -1;
|
818 |
goto out;
|
819 |
} |
820 |
} else {
|
821 |
param = parse_option_parameters("", create_options, param);
|
822 |
} |
823 |
|
824 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
825 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
826 |
if (ret < 0) { |
827 |
goto out;
|
828 |
} |
829 |
|
830 |
/* Get backing file name if -o backing_file was used */
|
831 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
832 |
if (out_baseimg_param) {
|
833 |
out_baseimg = out_baseimg_param->value.s; |
834 |
} |
835 |
|
836 |
/* Check if compression is supported */
|
837 |
if (compress) {
|
838 |
QEMUOptionParameter *encryption = |
839 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
840 |
QEMUOptionParameter *preallocation = |
841 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
842 |
|
843 |
if (!drv->bdrv_write_compressed) {
|
844 |
error_report("Compression not supported for this file format");
|
845 |
ret = -1;
|
846 |
goto out;
|
847 |
} |
848 |
|
849 |
if (encryption && encryption->value.n) {
|
850 |
error_report("Compression and encryption not supported at "
|
851 |
"the same time");
|
852 |
ret = -1;
|
853 |
goto out;
|
854 |
} |
855 |
|
856 |
if (preallocation && preallocation->value.s
|
857 |
&& strcmp(preallocation->value.s, "off"))
|
858 |
{ |
859 |
error_report("Compression and preallocation not supported at "
|
860 |
"the same time");
|
861 |
ret = -1;
|
862 |
goto out;
|
863 |
} |
864 |
} |
865 |
|
866 |
/* Create the new image */
|
867 |
ret = bdrv_create(drv, out_filename, param); |
868 |
if (ret < 0) { |
869 |
if (ret == -ENOTSUP) {
|
870 |
error_report("Formatting not supported for file format '%s'",
|
871 |
out_fmt); |
872 |
} else if (ret == -EFBIG) { |
873 |
error_report("The image size is too large for file format '%s'",
|
874 |
out_fmt); |
875 |
} else {
|
876 |
error_report("%s: error while converting %s: %s",
|
877 |
out_filename, out_fmt, strerror(-ret)); |
878 |
} |
879 |
goto out;
|
880 |
} |
881 |
|
882 |
flags = BDRV_O_RDWR; |
883 |
ret = bdrv_parse_cache_flags(cache, &flags); |
884 |
if (ret < 0) { |
885 |
error_report("Invalid cache option: %s", cache);
|
886 |
return -1; |
887 |
} |
888 |
|
889 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags); |
890 |
if (!out_bs) {
|
891 |
ret = -1;
|
892 |
goto out;
|
893 |
} |
894 |
|
895 |
bs_i = 0;
|
896 |
bs_offset = 0;
|
897 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
898 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
899 |
|
900 |
if (compress) {
|
901 |
ret = bdrv_get_info(out_bs, &bdi); |
902 |
if (ret < 0) { |
903 |
error_report("could not get block driver info");
|
904 |
goto out;
|
905 |
} |
906 |
cluster_size = bdi.cluster_size; |
907 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
908 |
error_report("invalid cluster size");
|
909 |
ret = -1;
|
910 |
goto out;
|
911 |
} |
912 |
cluster_sectors = cluster_size >> 9;
|
913 |
sector_num = 0;
|
914 |
|
915 |
nb_sectors = total_sectors; |
916 |
local_progress = (float)100 / |
917 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
918 |
|
919 |
for(;;) {
|
920 |
int64_t bs_num; |
921 |
int remainder;
|
922 |
uint8_t *buf2; |
923 |
|
924 |
nb_sectors = total_sectors - sector_num; |
925 |
if (nb_sectors <= 0) |
926 |
break;
|
927 |
if (nb_sectors >= cluster_sectors)
|
928 |
n = cluster_sectors; |
929 |
else
|
930 |
n = nb_sectors; |
931 |
|
932 |
bs_num = sector_num - bs_offset; |
933 |
assert (bs_num >= 0);
|
934 |
remainder = n; |
935 |
buf2 = buf; |
936 |
while (remainder > 0) { |
937 |
int nlow;
|
938 |
while (bs_num == bs_sectors) {
|
939 |
bs_i++; |
940 |
assert (bs_i < bs_n); |
941 |
bs_offset += bs_sectors; |
942 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
943 |
bs_num = 0;
|
944 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
945 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
946 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
947 |
} |
948 |
assert (bs_num < bs_sectors); |
949 |
|
950 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
951 |
|
952 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
953 |
if (ret < 0) { |
954 |
error_report("error while reading sector %" PRId64 ": %s", |
955 |
bs_num, strerror(-ret)); |
956 |
goto out;
|
957 |
} |
958 |
|
959 |
buf2 += nlow * 512;
|
960 |
bs_num += nlow; |
961 |
|
962 |
remainder -= nlow; |
963 |
} |
964 |
assert (remainder == 0);
|
965 |
|
966 |
if (n < cluster_sectors) {
|
967 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
968 |
} |
969 |
if (!buffer_is_zero(buf, cluster_size)) {
|
970 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
971 |
cluster_sectors); |
972 |
if (ret != 0) { |
973 |
error_report("error while compressing sector %" PRId64
|
974 |
": %s", sector_num, strerror(-ret));
|
975 |
goto out;
|
976 |
} |
977 |
} |
978 |
sector_num += n; |
979 |
qemu_progress_print(local_progress, 100);
|
980 |
} |
981 |
/* signal EOF to align */
|
982 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
983 |
} else {
|
984 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
985 |
|
986 |
sector_num = 0; // total number of sectors converted so far |
987 |
nb_sectors = total_sectors - sector_num; |
988 |
local_progress = (float)100 / |
989 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
990 |
|
991 |
for(;;) {
|
992 |
nb_sectors = total_sectors - sector_num; |
993 |
if (nb_sectors <= 0) { |
994 |
break;
|
995 |
} |
996 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
997 |
n = (IO_BUF_SIZE / 512);
|
998 |
} else {
|
999 |
n = nb_sectors; |
1000 |
} |
1001 |
|
1002 |
while (sector_num - bs_offset >= bs_sectors) {
|
1003 |
bs_i ++; |
1004 |
assert (bs_i < bs_n); |
1005 |
bs_offset += bs_sectors; |
1006 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1007 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
1008 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
1009 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
1010 |
} |
1011 |
|
1012 |
if (n > bs_offset + bs_sectors - sector_num) {
|
1013 |
n = bs_offset + bs_sectors - sector_num; |
1014 |
} |
1015 |
|
1016 |
if (has_zero_init) {
|
1017 |
/* If the output image is being created as a copy on write image,
|
1018 |
assume that sectors which are unallocated in the input image
|
1019 |
are present in both the output's and input's base images (no
|
1020 |
need to copy them). */
|
1021 |
if (out_baseimg) {
|
1022 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
1023 |
n, &n1)) { |
1024 |
sector_num += n1; |
1025 |
continue;
|
1026 |
} |
1027 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
1028 |
only those as they may be followed by unallocated sectors. */
|
1029 |
n = n1; |
1030 |
} |
1031 |
} else {
|
1032 |
n1 = n; |
1033 |
} |
1034 |
|
1035 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
1036 |
if (ret < 0) { |
1037 |
error_report("error while reading sector %" PRId64 ": %s", |
1038 |
sector_num - bs_offset, strerror(-ret)); |
1039 |
goto out;
|
1040 |
} |
1041 |
/* NOTE: at the same time we convert, we do not write zero
|
1042 |
sectors to have a chance to compress the image. Ideally, we
|
1043 |
should add a specific call to have the info to go faster */
|
1044 |
buf1 = buf; |
1045 |
while (n > 0) { |
1046 |
/* If the output image is being created as a copy on write image,
|
1047 |
copy all sectors even the ones containing only NUL bytes,
|
1048 |
because they may differ from the sectors in the base image.
|
1049 |
|
1050 |
If the output is to a host device, we also write out
|
1051 |
sectors that are entirely 0, since whatever data was
|
1052 |
already there is garbage, not 0s. */
|
1053 |
if (!has_zero_init || out_baseimg ||
|
1054 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1055 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1056 |
if (ret < 0) { |
1057 |
error_report("error while writing sector %" PRId64
|
1058 |
": %s", sector_num, strerror(-ret));
|
1059 |
goto out;
|
1060 |
} |
1061 |
} |
1062 |
sector_num += n1; |
1063 |
n -= n1; |
1064 |
buf1 += n1 * 512;
|
1065 |
} |
1066 |
qemu_progress_print(local_progress, 100);
|
1067 |
} |
1068 |
} |
1069 |
out:
|
1070 |
qemu_progress_end(); |
1071 |
free_option_parameters(create_options); |
1072 |
free_option_parameters(param); |
1073 |
qemu_vfree(buf); |
1074 |
if (out_bs) {
|
1075 |
bdrv_delete(out_bs); |
1076 |
} |
1077 |
if (bs) {
|
1078 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1079 |
if (bs[bs_i]) {
|
1080 |
bdrv_delete(bs[bs_i]); |
1081 |
} |
1082 |
} |
1083 |
g_free(bs); |
1084 |
} |
1085 |
if (ret) {
|
1086 |
return 1; |
1087 |
} |
1088 |
return 0; |
1089 |
} |
1090 |
|
1091 |
|
1092 |
static void dump_snapshots(BlockDriverState *bs) |
1093 |
{ |
1094 |
QEMUSnapshotInfo *sn_tab, *sn; |
1095 |
int nb_sns, i;
|
1096 |
char buf[256]; |
1097 |
|
1098 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1099 |
if (nb_sns <= 0) |
1100 |
return;
|
1101 |
printf("Snapshot list:\n");
|
1102 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1103 |
for(i = 0; i < nb_sns; i++) { |
1104 |
sn = &sn_tab[i]; |
1105 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1106 |
} |
1107 |
g_free(sn_tab); |
1108 |
} |
1109 |
|
1110 |
static void collect_snapshots(BlockDriverState *bs , ImageInfo *info) |
1111 |
{ |
1112 |
int i, sn_count;
|
1113 |
QEMUSnapshotInfo *sn_tab = NULL;
|
1114 |
SnapshotInfoList *info_list, *cur_item = NULL;
|
1115 |
sn_count = bdrv_snapshot_list(bs, &sn_tab); |
1116 |
|
1117 |
for (i = 0; i < sn_count; i++) { |
1118 |
info->has_snapshots = true;
|
1119 |
info_list = g_new0(SnapshotInfoList, 1);
|
1120 |
|
1121 |
info_list->value = g_new0(SnapshotInfo, 1);
|
1122 |
info_list->value->id = g_strdup(sn_tab[i].id_str); |
1123 |
info_list->value->name = g_strdup(sn_tab[i].name); |
1124 |
info_list->value->vm_state_size = sn_tab[i].vm_state_size; |
1125 |
info_list->value->date_sec = sn_tab[i].date_sec; |
1126 |
info_list->value->date_nsec = sn_tab[i].date_nsec; |
1127 |
info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
|
1128 |
info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
|
1129 |
|
1130 |
/* XXX: waiting for the qapi to support qemu-queue.h types */
|
1131 |
if (!cur_item) {
|
1132 |
info->snapshots = cur_item = info_list; |
1133 |
} else {
|
1134 |
cur_item->next = info_list; |
1135 |
cur_item = info_list; |
1136 |
} |
1137 |
|
1138 |
} |
1139 |
|
1140 |
g_free(sn_tab); |
1141 |
} |
1142 |
|
1143 |
static void dump_json_image_info(ImageInfo *info) |
1144 |
{ |
1145 |
Error *errp = NULL;
|
1146 |
QString *str; |
1147 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1148 |
QObject *obj; |
1149 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
1150 |
&info, NULL, &errp);
|
1151 |
obj = qmp_output_get_qobject(ov); |
1152 |
str = qobject_to_json_pretty(obj); |
1153 |
assert(str != NULL);
|
1154 |
printf("%s\n", qstring_get_str(str));
|
1155 |
qobject_decref(obj); |
1156 |
qmp_output_visitor_cleanup(ov); |
1157 |
QDECREF(str); |
1158 |
} |
1159 |
|
1160 |
static void collect_image_info(BlockDriverState *bs, |
1161 |
ImageInfo *info, |
1162 |
const char *filename, |
1163 |
const char *fmt) |
1164 |
{ |
1165 |
uint64_t total_sectors; |
1166 |
char backing_filename[1024]; |
1167 |
char backing_filename2[1024]; |
1168 |
BlockDriverInfo bdi; |
1169 |
|
1170 |
bdrv_get_geometry(bs, &total_sectors); |
1171 |
|
1172 |
info->filename = g_strdup(filename); |
1173 |
info->format = g_strdup(bdrv_get_format_name(bs)); |
1174 |
info->virtual_size = total_sectors * 512;
|
1175 |
info->actual_size = bdrv_get_allocated_file_size(bs); |
1176 |
info->has_actual_size = info->actual_size >= 0;
|
1177 |
if (bdrv_is_encrypted(bs)) {
|
1178 |
info->encrypted = true;
|
1179 |
info->has_encrypted = true;
|
1180 |
} |
1181 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
1182 |
if (bdi.cluster_size != 0) { |
1183 |
info->cluster_size = bdi.cluster_size; |
1184 |
info->has_cluster_size = true;
|
1185 |
} |
1186 |
info->dirty_flag = bdi.is_dirty; |
1187 |
info->has_dirty_flag = true;
|
1188 |
} |
1189 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
1190 |
if (backing_filename[0] != '\0') { |
1191 |
info->backing_filename = g_strdup(backing_filename); |
1192 |
info->has_backing_filename = true;
|
1193 |
bdrv_get_full_backing_filename(bs, backing_filename2, |
1194 |
sizeof(backing_filename2));
|
1195 |
|
1196 |
if (strcmp(backing_filename, backing_filename2) != 0) { |
1197 |
info->full_backing_filename = |
1198 |
g_strdup(backing_filename2); |
1199 |
info->has_full_backing_filename = true;
|
1200 |
} |
1201 |
|
1202 |
if (bs->backing_format[0]) { |
1203 |
info->backing_filename_format = g_strdup(bs->backing_format); |
1204 |
info->has_backing_filename_format = true;
|
1205 |
} |
1206 |
} |
1207 |
} |
1208 |
|
1209 |
static void dump_human_image_info(ImageInfo *info) |
1210 |
{ |
1211 |
char size_buf[128], dsize_buf[128]; |
1212 |
if (!info->has_actual_size) {
|
1213 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
1214 |
} else {
|
1215 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
1216 |
info->actual_size); |
1217 |
} |
1218 |
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
|
1219 |
printf("image: %s\n"
|
1220 |
"file format: %s\n"
|
1221 |
"virtual size: %s (%" PRId64 " bytes)\n" |
1222 |
"disk size: %s\n",
|
1223 |
info->filename, info->format, size_buf, |
1224 |
info->virtual_size, |
1225 |
dsize_buf); |
1226 |
|
1227 |
if (info->has_encrypted && info->encrypted) {
|
1228 |
printf("encrypted: yes\n");
|
1229 |
} |
1230 |
|
1231 |
if (info->has_cluster_size) {
|
1232 |
printf("cluster_size: %" PRId64 "\n", info->cluster_size); |
1233 |
} |
1234 |
|
1235 |
if (info->has_dirty_flag && info->dirty_flag) {
|
1236 |
printf("cleanly shut down: no\n");
|
1237 |
} |
1238 |
|
1239 |
if (info->has_backing_filename) {
|
1240 |
printf("backing file: %s", info->backing_filename);
|
1241 |
if (info->has_full_backing_filename) {
|
1242 |
printf(" (actual path: %s)", info->full_backing_filename);
|
1243 |
} |
1244 |
putchar('\n');
|
1245 |
if (info->has_backing_filename_format) {
|
1246 |
printf("backing file format: %s\n", info->backing_filename_format);
|
1247 |
} |
1248 |
} |
1249 |
} |
1250 |
|
1251 |
enum {OPTION_OUTPUT = 256}; |
1252 |
|
1253 |
typedef enum OutputFormat { |
1254 |
OFORMAT_JSON, |
1255 |
OFORMAT_HUMAN, |
1256 |
} OutputFormat; |
1257 |
|
1258 |
static int img_info(int argc, char **argv) |
1259 |
{ |
1260 |
int c;
|
1261 |
OutputFormat output_format = OFORMAT_HUMAN; |
1262 |
const char *filename, *fmt, *output; |
1263 |
BlockDriverState *bs; |
1264 |
ImageInfo *info; |
1265 |
|
1266 |
fmt = NULL;
|
1267 |
output = NULL;
|
1268 |
for(;;) {
|
1269 |
int option_index = 0; |
1270 |
static const struct option long_options[] = { |
1271 |
{"help", no_argument, 0, 'h'}, |
1272 |
{"format", required_argument, 0, 'f'}, |
1273 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
1274 |
{0, 0, 0, 0} |
1275 |
}; |
1276 |
c = getopt_long(argc, argv, "f:h",
|
1277 |
long_options, &option_index); |
1278 |
if (c == -1) { |
1279 |
break;
|
1280 |
} |
1281 |
switch(c) {
|
1282 |
case '?': |
1283 |
case 'h': |
1284 |
help(); |
1285 |
break;
|
1286 |
case 'f': |
1287 |
fmt = optarg; |
1288 |
break;
|
1289 |
case OPTION_OUTPUT:
|
1290 |
output = optarg; |
1291 |
break;
|
1292 |
} |
1293 |
} |
1294 |
if (optind >= argc) {
|
1295 |
help(); |
1296 |
} |
1297 |
filename = argv[optind++]; |
1298 |
|
1299 |
if (output && !strcmp(output, "json")) { |
1300 |
output_format = OFORMAT_JSON; |
1301 |
} else if (output && !strcmp(output, "human")) { |
1302 |
output_format = OFORMAT_HUMAN; |
1303 |
} else if (output) { |
1304 |
error_report("--output must be used with human or json as argument.");
|
1305 |
return 1; |
1306 |
} |
1307 |
|
1308 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
1309 |
if (!bs) {
|
1310 |
return 1; |
1311 |
} |
1312 |
|
1313 |
info = g_new0(ImageInfo, 1);
|
1314 |
collect_image_info(bs, info, filename, fmt); |
1315 |
|
1316 |
switch (output_format) {
|
1317 |
case OFORMAT_HUMAN:
|
1318 |
dump_human_image_info(info); |
1319 |
dump_snapshots(bs); |
1320 |
break;
|
1321 |
case OFORMAT_JSON:
|
1322 |
collect_snapshots(bs, info); |
1323 |
dump_json_image_info(info); |
1324 |
break;
|
1325 |
} |
1326 |
|
1327 |
qapi_free_ImageInfo(info); |
1328 |
bdrv_delete(bs); |
1329 |
return 0; |
1330 |
} |
1331 |
|
1332 |
#define SNAPSHOT_LIST 1 |
1333 |
#define SNAPSHOT_CREATE 2 |
1334 |
#define SNAPSHOT_APPLY 3 |
1335 |
#define SNAPSHOT_DELETE 4 |
1336 |
|
1337 |
static int img_snapshot(int argc, char **argv) |
1338 |
{ |
1339 |
BlockDriverState *bs; |
1340 |
QEMUSnapshotInfo sn; |
1341 |
char *filename, *snapshot_name = NULL; |
1342 |
int c, ret = 0, bdrv_oflags; |
1343 |
int action = 0; |
1344 |
qemu_timeval tv; |
1345 |
|
1346 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
1347 |
/* Parse commandline parameters */
|
1348 |
for(;;) {
|
1349 |
c = getopt(argc, argv, "la:c:d:h");
|
1350 |
if (c == -1) { |
1351 |
break;
|
1352 |
} |
1353 |
switch(c) {
|
1354 |
case '?': |
1355 |
case 'h': |
1356 |
help(); |
1357 |
return 0; |
1358 |
case 'l': |
1359 |
if (action) {
|
1360 |
help(); |
1361 |
return 0; |
1362 |
} |
1363 |
action = SNAPSHOT_LIST; |
1364 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
1365 |
break;
|
1366 |
case 'a': |
1367 |
if (action) {
|
1368 |
help(); |
1369 |
return 0; |
1370 |
} |
1371 |
action = SNAPSHOT_APPLY; |
1372 |
snapshot_name = optarg; |
1373 |
break;
|
1374 |
case 'c': |
1375 |
if (action) {
|
1376 |
help(); |
1377 |
return 0; |
1378 |
} |
1379 |
action = SNAPSHOT_CREATE; |
1380 |
snapshot_name = optarg; |
1381 |
break;
|
1382 |
case 'd': |
1383 |
if (action) {
|
1384 |
help(); |
1385 |
return 0; |
1386 |
} |
1387 |
action = SNAPSHOT_DELETE; |
1388 |
snapshot_name = optarg; |
1389 |
break;
|
1390 |
} |
1391 |
} |
1392 |
|
1393 |
if (optind >= argc) {
|
1394 |
help(); |
1395 |
} |
1396 |
filename = argv[optind++]; |
1397 |
|
1398 |
/* Open the image */
|
1399 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags);
|
1400 |
if (!bs) {
|
1401 |
return 1; |
1402 |
} |
1403 |
|
1404 |
/* Perform the requested action */
|
1405 |
switch(action) {
|
1406 |
case SNAPSHOT_LIST:
|
1407 |
dump_snapshots(bs); |
1408 |
break;
|
1409 |
|
1410 |
case SNAPSHOT_CREATE:
|
1411 |
memset(&sn, 0, sizeof(sn)); |
1412 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
1413 |
|
1414 |
qemu_gettimeofday(&tv); |
1415 |
sn.date_sec = tv.tv_sec; |
1416 |
sn.date_nsec = tv.tv_usec * 1000;
|
1417 |
|
1418 |
ret = bdrv_snapshot_create(bs, &sn); |
1419 |
if (ret) {
|
1420 |
error_report("Could not create snapshot '%s': %d (%s)",
|
1421 |
snapshot_name, ret, strerror(-ret)); |
1422 |
} |
1423 |
break;
|
1424 |
|
1425 |
case SNAPSHOT_APPLY:
|
1426 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
1427 |
if (ret) {
|
1428 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
1429 |
snapshot_name, ret, strerror(-ret)); |
1430 |
} |
1431 |
break;
|
1432 |
|
1433 |
case SNAPSHOT_DELETE:
|
1434 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
1435 |
if (ret) {
|
1436 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
1437 |
snapshot_name, ret, strerror(-ret)); |
1438 |
} |
1439 |
break;
|
1440 |
} |
1441 |
|
1442 |
/* Cleanup */
|
1443 |
bdrv_delete(bs); |
1444 |
if (ret) {
|
1445 |
return 1; |
1446 |
} |
1447 |
return 0; |
1448 |
} |
1449 |
|
1450 |
static int img_rebase(int argc, char **argv) |
1451 |
{ |
1452 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
1453 |
BlockDriver *old_backing_drv, *new_backing_drv; |
1454 |
char *filename;
|
1455 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
1456 |
int c, flags, ret;
|
1457 |
int unsafe = 0; |
1458 |
int progress = 0; |
1459 |
|
1460 |
/* Parse commandline parameters */
|
1461 |
fmt = NULL;
|
1462 |
cache = BDRV_DEFAULT_CACHE; |
1463 |
out_baseimg = NULL;
|
1464 |
out_basefmt = NULL;
|
1465 |
for(;;) {
|
1466 |
c = getopt(argc, argv, "uhf:F:b:pt:");
|
1467 |
if (c == -1) { |
1468 |
break;
|
1469 |
} |
1470 |
switch(c) {
|
1471 |
case '?': |
1472 |
case 'h': |
1473 |
help(); |
1474 |
return 0; |
1475 |
case 'f': |
1476 |
fmt = optarg; |
1477 |
break;
|
1478 |
case 'F': |
1479 |
out_basefmt = optarg; |
1480 |
break;
|
1481 |
case 'b': |
1482 |
out_baseimg = optarg; |
1483 |
break;
|
1484 |
case 'u': |
1485 |
unsafe = 1;
|
1486 |
break;
|
1487 |
case 'p': |
1488 |
progress = 1;
|
1489 |
break;
|
1490 |
case 't': |
1491 |
cache = optarg; |
1492 |
break;
|
1493 |
} |
1494 |
} |
1495 |
|
1496 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
1497 |
help(); |
1498 |
} |
1499 |
filename = argv[optind++]; |
1500 |
|
1501 |
qemu_progress_init(progress, 2.0); |
1502 |
qemu_progress_print(0, 100); |
1503 |
|
1504 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
1505 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1506 |
if (ret < 0) { |
1507 |
error_report("Invalid cache option: %s", cache);
|
1508 |
return -1; |
1509 |
} |
1510 |
|
1511 |
/*
|
1512 |
* Open the images.
|
1513 |
*
|
1514 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
1515 |
* the reference to a renamed or moved backing file.
|
1516 |
*/
|
1517 |
bs = bdrv_new_open(filename, fmt, flags); |
1518 |
if (!bs) {
|
1519 |
return 1; |
1520 |
} |
1521 |
|
1522 |
/* Find the right drivers for the backing files */
|
1523 |
old_backing_drv = NULL;
|
1524 |
new_backing_drv = NULL;
|
1525 |
|
1526 |
if (!unsafe && bs->backing_format[0] != '\0') { |
1527 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
1528 |
if (old_backing_drv == NULL) { |
1529 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
1530 |
ret = -1;
|
1531 |
goto out;
|
1532 |
} |
1533 |
} |
1534 |
|
1535 |
if (out_basefmt != NULL) { |
1536 |
new_backing_drv = bdrv_find_format(out_basefmt); |
1537 |
if (new_backing_drv == NULL) { |
1538 |
error_report("Invalid format name: '%s'", out_basefmt);
|
1539 |
ret = -1;
|
1540 |
goto out;
|
1541 |
} |
1542 |
} |
1543 |
|
1544 |
/* For safe rebasing we need to compare old and new backing file */
|
1545 |
if (unsafe) {
|
1546 |
/* Make the compiler happy */
|
1547 |
bs_old_backing = NULL;
|
1548 |
bs_new_backing = NULL;
|
1549 |
} else {
|
1550 |
char backing_name[1024]; |
1551 |
|
1552 |
bs_old_backing = bdrv_new("old_backing");
|
1553 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
1554 |
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1555 |
old_backing_drv); |
1556 |
if (ret) {
|
1557 |
error_report("Could not open old backing file '%s'", backing_name);
|
1558 |
goto out;
|
1559 |
} |
1560 |
|
1561 |
bs_new_backing = bdrv_new("new_backing");
|
1562 |
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
1563 |
new_backing_drv); |
1564 |
if (ret) {
|
1565 |
error_report("Could not open new backing file '%s'", out_baseimg);
|
1566 |
goto out;
|
1567 |
} |
1568 |
} |
1569 |
|
1570 |
/*
|
1571 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
1572 |
* accesses go to the backing file. We must therefore compare this cluster
|
1573 |
* in the old and new backing file, and if they differ we need to copy it
|
1574 |
* from the old backing file into the COW file.
|
1575 |
*
|
1576 |
* If qemu-img crashes during this step, no harm is done. The content of
|
1577 |
* the image is the same as the original one at any time.
|
1578 |
*/
|
1579 |
if (!unsafe) {
|
1580 |
uint64_t num_sectors; |
1581 |
uint64_t old_backing_num_sectors; |
1582 |
uint64_t new_backing_num_sectors; |
1583 |
uint64_t sector; |
1584 |
int n;
|
1585 |
uint8_t * buf_old; |
1586 |
uint8_t * buf_new; |
1587 |
float local_progress;
|
1588 |
|
1589 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
1590 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
1591 |
|
1592 |
bdrv_get_geometry(bs, &num_sectors); |
1593 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
1594 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
1595 |
|
1596 |
local_progress = (float)100 / |
1597 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
1598 |
for (sector = 0; sector < num_sectors; sector += n) { |
1599 |
|
1600 |
/* How many sectors can we handle with the next read? */
|
1601 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
1602 |
n = (IO_BUF_SIZE / 512);
|
1603 |
} else {
|
1604 |
n = num_sectors - sector; |
1605 |
} |
1606 |
|
1607 |
/* If the cluster is allocated, we don't need to take action */
|
1608 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
1609 |
if (ret) {
|
1610 |
continue;
|
1611 |
} |
1612 |
|
1613 |
/*
|
1614 |
* Read old and new backing file and take into consideration that
|
1615 |
* backing files may be smaller than the COW image.
|
1616 |
*/
|
1617 |
if (sector >= old_backing_num_sectors) {
|
1618 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
1619 |
} else {
|
1620 |
if (sector + n > old_backing_num_sectors) {
|
1621 |
n = old_backing_num_sectors - sector; |
1622 |
} |
1623 |
|
1624 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1625 |
if (ret < 0) { |
1626 |
error_report("error while reading from old backing file");
|
1627 |
goto out;
|
1628 |
} |
1629 |
} |
1630 |
|
1631 |
if (sector >= new_backing_num_sectors) {
|
1632 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
1633 |
} else {
|
1634 |
if (sector + n > new_backing_num_sectors) {
|
1635 |
n = new_backing_num_sectors - sector; |
1636 |
} |
1637 |
|
1638 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1639 |
if (ret < 0) { |
1640 |
error_report("error while reading from new backing file");
|
1641 |
goto out;
|
1642 |
} |
1643 |
} |
1644 |
|
1645 |
/* If they differ, we need to write to the COW file */
|
1646 |
uint64_t written = 0;
|
1647 |
|
1648 |
while (written < n) {
|
1649 |
int pnum;
|
1650 |
|
1651 |
if (compare_sectors(buf_old + written * 512, |
1652 |
buf_new + written * 512, n - written, &pnum))
|
1653 |
{ |
1654 |
ret = bdrv_write(bs, sector + written, |
1655 |
buf_old + written * 512, pnum);
|
1656 |
if (ret < 0) { |
1657 |
error_report("Error while writing to COW image: %s",
|
1658 |
strerror(-ret)); |
1659 |
goto out;
|
1660 |
} |
1661 |
} |
1662 |
|
1663 |
written += pnum; |
1664 |
} |
1665 |
qemu_progress_print(local_progress, 100);
|
1666 |
} |
1667 |
|
1668 |
qemu_vfree(buf_old); |
1669 |
qemu_vfree(buf_new); |
1670 |
} |
1671 |
|
1672 |
/*
|
1673 |
* Change the backing file. All clusters that are different from the old
|
1674 |
* backing file are overwritten in the COW file now, so the visible content
|
1675 |
* doesn't change when we switch the backing file.
|
1676 |
*/
|
1677 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
1678 |
if (ret == -ENOSPC) {
|
1679 |
error_report("Could not change the backing file to '%s': No "
|
1680 |
"space left in the file header", out_baseimg);
|
1681 |
} else if (ret < 0) { |
1682 |
error_report("Could not change the backing file to '%s': %s",
|
1683 |
out_baseimg, strerror(-ret)); |
1684 |
} |
1685 |
|
1686 |
qemu_progress_print(100, 0); |
1687 |
/*
|
1688 |
* TODO At this point it is possible to check if any clusters that are
|
1689 |
* allocated in the COW file are the same in the backing file. If so, they
|
1690 |
* could be dropped from the COW file. Don't do this before switching the
|
1691 |
* backing file, in case of a crash this would lead to corruption.
|
1692 |
*/
|
1693 |
out:
|
1694 |
qemu_progress_end(); |
1695 |
/* Cleanup */
|
1696 |
if (!unsafe) {
|
1697 |
if (bs_old_backing != NULL) { |
1698 |
bdrv_delete(bs_old_backing); |
1699 |
} |
1700 |
if (bs_new_backing != NULL) { |
1701 |
bdrv_delete(bs_new_backing); |
1702 |
} |
1703 |
} |
1704 |
|
1705 |
bdrv_delete(bs); |
1706 |
if (ret) {
|
1707 |
return 1; |
1708 |
} |
1709 |
return 0; |
1710 |
} |
1711 |
|
1712 |
static int img_resize(int argc, char **argv) |
1713 |
{ |
1714 |
int c, ret, relative;
|
1715 |
const char *filename, *fmt, *size; |
1716 |
int64_t n, total_size; |
1717 |
BlockDriverState *bs = NULL;
|
1718 |
QemuOpts *param; |
1719 |
static QemuOptsList resize_options = {
|
1720 |
.name = "resize_options",
|
1721 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
1722 |
.desc = { |
1723 |
{ |
1724 |
.name = BLOCK_OPT_SIZE, |
1725 |
.type = QEMU_OPT_SIZE, |
1726 |
.help = "Virtual disk size"
|
1727 |
}, { |
1728 |
/* end of list */
|
1729 |
} |
1730 |
}, |
1731 |
}; |
1732 |
|
1733 |
/* Remove size from argv manually so that negative numbers are not treated
|
1734 |
* as options by getopt. */
|
1735 |
if (argc < 3) { |
1736 |
help(); |
1737 |
return 1; |
1738 |
} |
1739 |
|
1740 |
size = argv[--argc]; |
1741 |
|
1742 |
/* Parse getopt arguments */
|
1743 |
fmt = NULL;
|
1744 |
for(;;) {
|
1745 |
c = getopt(argc, argv, "f:h");
|
1746 |
if (c == -1) { |
1747 |
break;
|
1748 |
} |
1749 |
switch(c) {
|
1750 |
case '?': |
1751 |
case 'h': |
1752 |
help(); |
1753 |
break;
|
1754 |
case 'f': |
1755 |
fmt = optarg; |
1756 |
break;
|
1757 |
} |
1758 |
} |
1759 |
if (optind >= argc) {
|
1760 |
help(); |
1761 |
} |
1762 |
filename = argv[optind++]; |
1763 |
|
1764 |
/* Choose grow, shrink, or absolute resize mode */
|
1765 |
switch (size[0]) { |
1766 |
case '+': |
1767 |
relative = 1;
|
1768 |
size++; |
1769 |
break;
|
1770 |
case '-': |
1771 |
relative = -1;
|
1772 |
size++; |
1773 |
break;
|
1774 |
default:
|
1775 |
relative = 0;
|
1776 |
break;
|
1777 |
} |
1778 |
|
1779 |
/* Parse size */
|
1780 |
param = qemu_opts_create(&resize_options, NULL, 0, NULL); |
1781 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
1782 |
/* Error message already printed when size parsing fails */
|
1783 |
ret = -1;
|
1784 |
qemu_opts_del(param); |
1785 |
goto out;
|
1786 |
} |
1787 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
1788 |
qemu_opts_del(param); |
1789 |
|
1790 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
1791 |
if (!bs) {
|
1792 |
ret = -1;
|
1793 |
goto out;
|
1794 |
} |
1795 |
|
1796 |
if (relative) {
|
1797 |
total_size = bdrv_getlength(bs) + n * relative; |
1798 |
} else {
|
1799 |
total_size = n; |
1800 |
} |
1801 |
if (total_size <= 0) { |
1802 |
error_report("New image size must be positive");
|
1803 |
ret = -1;
|
1804 |
goto out;
|
1805 |
} |
1806 |
|
1807 |
ret = bdrv_truncate(bs, total_size); |
1808 |
switch (ret) {
|
1809 |
case 0: |
1810 |
printf("Image resized.\n");
|
1811 |
break;
|
1812 |
case -ENOTSUP:
|
1813 |
error_report("This image does not support resize");
|
1814 |
break;
|
1815 |
case -EACCES:
|
1816 |
error_report("Image is read-only");
|
1817 |
break;
|
1818 |
default:
|
1819 |
error_report("Error resizing image (%d)", -ret);
|
1820 |
break;
|
1821 |
} |
1822 |
out:
|
1823 |
if (bs) {
|
1824 |
bdrv_delete(bs); |
1825 |
} |
1826 |
if (ret) {
|
1827 |
return 1; |
1828 |
} |
1829 |
return 0; |
1830 |
} |
1831 |
|
1832 |
static const img_cmd_t img_cmds[] = { |
1833 |
#define DEF(option, callback, arg_string) \
|
1834 |
{ option, callback }, |
1835 |
#include "qemu-img-cmds.h" |
1836 |
#undef DEF
|
1837 |
#undef GEN_DOCS
|
1838 |
{ NULL, NULL, }, |
1839 |
}; |
1840 |
|
1841 |
int main(int argc, char **argv) |
1842 |
{ |
1843 |
const img_cmd_t *cmd;
|
1844 |
const char *cmdname; |
1845 |
|
1846 |
error_set_progname(argv[0]);
|
1847 |
|
1848 |
bdrv_init(); |
1849 |
if (argc < 2) |
1850 |
help(); |
1851 |
cmdname = argv[1];
|
1852 |
argc--; argv++; |
1853 |
|
1854 |
qemu_init_main_loop(); |
1855 |
|
1856 |
/* find the command */
|
1857 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
1858 |
if (!strcmp(cmdname, cmd->name)) {
|
1859 |
return cmd->handler(argc, argv);
|
1860 |
} |
1861 |
} |
1862 |
|
1863 |
/* not found */
|
1864 |
help(); |
1865 |
return 0; |
1866 |
} |