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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 "qemu-common.h" |
25 |
#include "qemu-option.h" |
26 |
#include "qemu-error.h" |
27 |
#include "osdep.h" |
28 |
#include "sysemu.h" |
29 |
#include "block_int.h" |
30 |
#include <stdio.h> |
31 |
|
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#ifdef _WIN32
|
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#include <windows.h> |
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#endif
|
35 |
|
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typedef struct img_cmd_t { |
37 |
const char *name; |
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int (*handler)(int argc, char **argv); |
39 |
} img_cmd_t; |
40 |
|
41 |
/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
|
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#define BDRV_O_FLAGS BDRV_O_CACHE_WB
|
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#define BDRV_DEFAULT_CACHE "writeback" |
44 |
|
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static void format_print(void *opaque, const char *name) |
46 |
{ |
47 |
printf(" %s", name);
|
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} |
49 |
|
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/* Please keep in synch with qemu-img.texi */
|
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static void help(void) |
52 |
{ |
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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" |
62 |
#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), 'writethrough', 'directsync'\n"
|
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" and 'unsafe'\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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"\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";
|
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|
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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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} |
100 |
|
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#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) |
104 |
{ |
105 |
int c, i;
|
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printf("Password: ");
|
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fflush(stdout); |
108 |
i = 0;
|
109 |
for(;;) {
|
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c = getchar(); |
111 |
if (c == '\n') |
112 |
break;
|
113 |
if (i < (buf_size - 1)) |
114 |
buf[i++] = c; |
115 |
} |
116 |
buf[i] = '\0';
|
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return 0; |
118 |
} |
119 |
|
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#else
|
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|
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#include <termios.h> |
123 |
|
124 |
static struct termios oldtty; |
125 |
|
126 |
static void term_exit(void) |
127 |
{ |
128 |
tcsetattr (0, TCSANOW, &oldtty);
|
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} |
130 |
|
131 |
static void term_init(void) |
132 |
{ |
133 |
struct termios tty;
|
134 |
|
135 |
tcgetattr (0, &tty);
|
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oldtty = tty; |
137 |
|
138 |
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
139 |
|INLCR|IGNCR|ICRNL|IXON); |
140 |
tty.c_oflag |= OPOST; |
141 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
142 |
tty.c_cflag &= ~(CSIZE|PARENB); |
143 |
tty.c_cflag |= CS8; |
144 |
tty.c_cc[VMIN] = 1;
|
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tty.c_cc[VTIME] = 0;
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146 |
|
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tcsetattr (0, TCSANOW, &tty);
|
148 |
|
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atexit(term_exit); |
150 |
} |
151 |
|
152 |
static int read_password(char *buf, int buf_size) |
153 |
{ |
154 |
uint8_t ch; |
155 |
int i, ret;
|
156 |
|
157 |
printf("password: ");
|
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fflush(stdout); |
159 |
term_init(); |
160 |
i = 0;
|
161 |
for(;;) {
|
162 |
ret = read(0, &ch, 1); |
163 |
if (ret == -1) { |
164 |
if (errno == EAGAIN || errno == EINTR) {
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continue;
|
166 |
} else {
|
167 |
ret = -1;
|
168 |
break;
|
169 |
} |
170 |
} else if (ret == 0) { |
171 |
ret = -1;
|
172 |
break;
|
173 |
} else {
|
174 |
if (ch == '\r') { |
175 |
ret = 0;
|
176 |
break;
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177 |
} |
178 |
if (i < (buf_size - 1)) |
179 |
buf[i++] = ch; |
180 |
} |
181 |
} |
182 |
term_exit(); |
183 |
buf[i] = '\0';
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184 |
printf("\n");
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return ret;
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} |
187 |
#endif
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188 |
|
189 |
static int print_block_option_help(const char *filename, const char *fmt) |
190 |
{ |
191 |
BlockDriver *drv, *proto_drv; |
192 |
QEMUOptionParameter *create_options = NULL;
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193 |
|
194 |
/* Find driver and parse its options */
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195 |
drv = bdrv_find_format(fmt); |
196 |
if (!drv) {
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197 |
error_report("Unknown file format '%s'", fmt);
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return 1; |
199 |
} |
200 |
|
201 |
proto_drv = bdrv_find_protocol(filename); |
202 |
if (!proto_drv) {
|
203 |
error_report("Unknown protocol '%s'", filename);
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return 1; |
205 |
} |
206 |
|
207 |
create_options = append_option_parameters(create_options, |
208 |
drv->create_options); |
209 |
create_options = append_option_parameters(create_options, |
210 |
proto_drv->create_options); |
211 |
print_option_help(create_options); |
212 |
free_option_parameters(create_options); |
213 |
return 0; |
214 |
} |
215 |
|
216 |
static BlockDriverState *bdrv_new_open(const char *filename, |
217 |
const char *fmt, |
218 |
int flags)
|
219 |
{ |
220 |
BlockDriverState *bs; |
221 |
BlockDriver *drv; |
222 |
char password[256]; |
223 |
int ret;
|
224 |
|
225 |
bs = bdrv_new("image");
|
226 |
|
227 |
if (fmt) {
|
228 |
drv = bdrv_find_format(fmt); |
229 |
if (!drv) {
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230 |
error_report("Unknown file format '%s'", fmt);
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goto fail;
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232 |
} |
233 |
} else {
|
234 |
drv = NULL;
|
235 |
} |
236 |
|
237 |
ret = bdrv_open(bs, filename, flags, drv); |
238 |
if (ret < 0) { |
239 |
error_report("Could not open '%s': %s", filename, strerror(-ret));
|
240 |
goto fail;
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241 |
} |
242 |
|
243 |
if (bdrv_is_encrypted(bs)) {
|
244 |
printf("Disk image '%s' is encrypted.\n", filename);
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if (read_password(password, sizeof(password)) < 0) { |
246 |
error_report("No password given");
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247 |
goto fail;
|
248 |
} |
249 |
if (bdrv_set_key(bs, password) < 0) { |
250 |
error_report("invalid password");
|
251 |
goto fail;
|
252 |
} |
253 |
} |
254 |
return bs;
|
255 |
fail:
|
256 |
if (bs) {
|
257 |
bdrv_delete(bs); |
258 |
} |
259 |
return NULL; |
260 |
} |
261 |
|
262 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
263 |
const char *base_filename, |
264 |
const char *base_fmt) |
265 |
{ |
266 |
if (base_filename) {
|
267 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
|
268 |
error_report("Backing file not supported for file format '%s'",
|
269 |
fmt); |
270 |
return -1; |
271 |
} |
272 |
} |
273 |
if (base_fmt) {
|
274 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
275 |
error_report("Backing file format not supported for file "
|
276 |
"format '%s'", fmt);
|
277 |
return -1; |
278 |
} |
279 |
} |
280 |
return 0; |
281 |
} |
282 |
|
283 |
static int img_create(int argc, char **argv) |
284 |
{ |
285 |
int c, ret = 0; |
286 |
uint64_t img_size = -1;
|
287 |
const char *fmt = "raw"; |
288 |
const char *base_fmt = NULL; |
289 |
const char *filename; |
290 |
const char *base_filename = NULL; |
291 |
char *options = NULL; |
292 |
|
293 |
for(;;) {
|
294 |
c = getopt(argc, argv, "F:b:f:he6o:");
|
295 |
if (c == -1) { |
296 |
break;
|
297 |
} |
298 |
switch(c) {
|
299 |
case '?': |
300 |
case 'h': |
301 |
help(); |
302 |
break;
|
303 |
case 'F': |
304 |
base_fmt = optarg; |
305 |
break;
|
306 |
case 'b': |
307 |
base_filename = optarg; |
308 |
break;
|
309 |
case 'f': |
310 |
fmt = optarg; |
311 |
break;
|
312 |
case 'e': |
313 |
error_report("option -e is deprecated, please use \'-o "
|
314 |
"encryption\' instead!");
|
315 |
return 1; |
316 |
case '6': |
317 |
error_report("option -6 is deprecated, please use \'-o "
|
318 |
"compat6\' instead!");
|
319 |
return 1; |
320 |
case 'o': |
321 |
options = optarg; |
322 |
break;
|
323 |
} |
324 |
} |
325 |
|
326 |
/* Get the filename */
|
327 |
if (optind >= argc) {
|
328 |
help(); |
329 |
} |
330 |
filename = argv[optind++]; |
331 |
|
332 |
/* Get image size, if specified */
|
333 |
if (optind < argc) {
|
334 |
int64_t sval; |
335 |
char *end;
|
336 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
337 |
if (sval < 0 || *end) { |
338 |
error_report("Invalid image size specified! You may use k, M, G or "
|
339 |
"T suffixes for ");
|
340 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
341 |
ret = -1;
|
342 |
goto out;
|
343 |
} |
344 |
img_size = (uint64_t)sval; |
345 |
} |
346 |
|
347 |
if (options && !strcmp(options, "?")) { |
348 |
ret = print_block_option_help(filename, fmt); |
349 |
goto out;
|
350 |
} |
351 |
|
352 |
ret = bdrv_img_create(filename, fmt, base_filename, base_fmt, |
353 |
options, img_size, BDRV_O_FLAGS); |
354 |
out:
|
355 |
if (ret) {
|
356 |
return 1; |
357 |
} |
358 |
return 0; |
359 |
} |
360 |
|
361 |
/*
|
362 |
* Checks an image for consistency. Exit codes:
|
363 |
*
|
364 |
* 0 - Check completed, image is good
|
365 |
* 1 - Check not completed because of internal errors
|
366 |
* 2 - Check completed, image is corrupted
|
367 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
368 |
*/
|
369 |
static int img_check(int argc, char **argv) |
370 |
{ |
371 |
int c, ret;
|
372 |
const char *filename, *fmt; |
373 |
BlockDriverState *bs; |
374 |
BdrvCheckResult result; |
375 |
|
376 |
fmt = NULL;
|
377 |
for(;;) {
|
378 |
c = getopt(argc, argv, "f:h");
|
379 |
if (c == -1) { |
380 |
break;
|
381 |
} |
382 |
switch(c) {
|
383 |
case '?': |
384 |
case 'h': |
385 |
help(); |
386 |
break;
|
387 |
case 'f': |
388 |
fmt = optarg; |
389 |
break;
|
390 |
} |
391 |
} |
392 |
if (optind >= argc) {
|
393 |
help(); |
394 |
} |
395 |
filename = argv[optind++]; |
396 |
|
397 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
398 |
if (!bs) {
|
399 |
return 1; |
400 |
} |
401 |
ret = bdrv_check(bs, &result); |
402 |
|
403 |
if (ret == -ENOTSUP) {
|
404 |
error_report("This image format does not support checks");
|
405 |
bdrv_delete(bs); |
406 |
return 1; |
407 |
} |
408 |
|
409 |
if (!(result.corruptions || result.leaks || result.check_errors)) {
|
410 |
printf("No errors were found on the image.\n");
|
411 |
} else {
|
412 |
if (result.corruptions) {
|
413 |
printf("\n%d errors were found on the image.\n"
|
414 |
"Data may be corrupted, or further writes to the image "
|
415 |
"may corrupt it.\n",
|
416 |
result.corruptions); |
417 |
} |
418 |
|
419 |
if (result.leaks) {
|
420 |
printf("\n%d leaked clusters were found on the image.\n"
|
421 |
"This means waste of disk space, but no harm to data.\n",
|
422 |
result.leaks); |
423 |
} |
424 |
|
425 |
if (result.check_errors) {
|
426 |
printf("\n%d internal errors have occurred during the check.\n",
|
427 |
result.check_errors); |
428 |
} |
429 |
} |
430 |
|
431 |
bdrv_delete(bs); |
432 |
|
433 |
if (ret < 0 || result.check_errors) { |
434 |
printf("\nAn error has occurred during the check: %s\n"
|
435 |
"The check is not complete and may have missed error.\n",
|
436 |
strerror(-ret)); |
437 |
return 1; |
438 |
} |
439 |
|
440 |
if (result.corruptions) {
|
441 |
return 2; |
442 |
} else if (result.leaks) { |
443 |
return 3; |
444 |
} else {
|
445 |
return 0; |
446 |
} |
447 |
} |
448 |
|
449 |
static int img_commit(int argc, char **argv) |
450 |
{ |
451 |
int c, ret, flags;
|
452 |
const char *filename, *fmt, *cache; |
453 |
BlockDriverState *bs; |
454 |
|
455 |
fmt = NULL;
|
456 |
cache = BDRV_DEFAULT_CACHE; |
457 |
for(;;) {
|
458 |
c = getopt(argc, argv, "f:ht:");
|
459 |
if (c == -1) { |
460 |
break;
|
461 |
} |
462 |
switch(c) {
|
463 |
case '?': |
464 |
case 'h': |
465 |
help(); |
466 |
break;
|
467 |
case 'f': |
468 |
fmt = optarg; |
469 |
break;
|
470 |
case 't': |
471 |
cache = optarg; |
472 |
break;
|
473 |
} |
474 |
} |
475 |
if (optind >= argc) {
|
476 |
help(); |
477 |
} |
478 |
filename = argv[optind++]; |
479 |
|
480 |
flags = BDRV_O_RDWR; |
481 |
ret = bdrv_parse_cache_flags(cache, &flags); |
482 |
if (ret < 0) { |
483 |
error_report("Invalid cache option: %s", cache);
|
484 |
return -1; |
485 |
} |
486 |
|
487 |
bs = bdrv_new_open(filename, fmt, flags); |
488 |
if (!bs) {
|
489 |
return 1; |
490 |
} |
491 |
ret = bdrv_commit(bs); |
492 |
switch(ret) {
|
493 |
case 0: |
494 |
printf("Image committed.\n");
|
495 |
break;
|
496 |
case -ENOENT:
|
497 |
error_report("No disk inserted");
|
498 |
break;
|
499 |
case -EACCES:
|
500 |
error_report("Image is read-only");
|
501 |
break;
|
502 |
case -ENOTSUP:
|
503 |
error_report("Image is already committed");
|
504 |
break;
|
505 |
default:
|
506 |
error_report("Error while committing image");
|
507 |
break;
|
508 |
} |
509 |
|
510 |
bdrv_delete(bs); |
511 |
if (ret) {
|
512 |
return 1; |
513 |
} |
514 |
return 0; |
515 |
} |
516 |
|
517 |
/*
|
518 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
519 |
* a non-NUL byte.
|
520 |
*
|
521 |
* 'pnum' is set to the number of sectors (including and immediately following
|
522 |
* the first one) that are known to be in the same allocated/unallocated state.
|
523 |
*/
|
524 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
525 |
{ |
526 |
bool is_zero;
|
527 |
int i;
|
528 |
|
529 |
if (n <= 0) { |
530 |
*pnum = 0;
|
531 |
return 0; |
532 |
} |
533 |
is_zero = buffer_is_zero(buf, 512);
|
534 |
for(i = 1; i < n; i++) { |
535 |
buf += 512;
|
536 |
if (is_zero != buffer_is_zero(buf, 512)) { |
537 |
break;
|
538 |
} |
539 |
} |
540 |
*pnum = i; |
541 |
return !is_zero;
|
542 |
} |
543 |
|
544 |
/*
|
545 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
546 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
547 |
* breaking up write requests for only small sparse areas.
|
548 |
*/
|
549 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
550 |
int min)
|
551 |
{ |
552 |
int ret;
|
553 |
int num_checked, num_used;
|
554 |
|
555 |
if (n < min) {
|
556 |
min = n; |
557 |
} |
558 |
|
559 |
ret = is_allocated_sectors(buf, n, pnum); |
560 |
if (!ret) {
|
561 |
return ret;
|
562 |
} |
563 |
|
564 |
num_used = *pnum; |
565 |
buf += BDRV_SECTOR_SIZE * *pnum; |
566 |
n -= *pnum; |
567 |
num_checked = num_used; |
568 |
|
569 |
while (n > 0) { |
570 |
ret = is_allocated_sectors(buf, n, pnum); |
571 |
|
572 |
buf += BDRV_SECTOR_SIZE * *pnum; |
573 |
n -= *pnum; |
574 |
num_checked += *pnum; |
575 |
if (ret) {
|
576 |
num_used = num_checked; |
577 |
} else if (*pnum >= min) { |
578 |
break;
|
579 |
} |
580 |
} |
581 |
|
582 |
*pnum = num_used; |
583 |
return 1; |
584 |
} |
585 |
|
586 |
/*
|
587 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
588 |
* buffers matches, non-zero otherwise.
|
589 |
*
|
590 |
* pnum is set to the number of sectors (including and immediately following
|
591 |
* the first one) that are known to have the same comparison result
|
592 |
*/
|
593 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
594 |
int *pnum)
|
595 |
{ |
596 |
int res, i;
|
597 |
|
598 |
if (n <= 0) { |
599 |
*pnum = 0;
|
600 |
return 0; |
601 |
} |
602 |
|
603 |
res = !!memcmp(buf1, buf2, 512);
|
604 |
for(i = 1; i < n; i++) { |
605 |
buf1 += 512;
|
606 |
buf2 += 512;
|
607 |
|
608 |
if (!!memcmp(buf1, buf2, 512) != res) { |
609 |
break;
|
610 |
} |
611 |
} |
612 |
|
613 |
*pnum = i; |
614 |
return res;
|
615 |
} |
616 |
|
617 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
618 |
|
619 |
static int img_convert(int argc, char **argv) |
620 |
{ |
621 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
622 |
int progress = 0, flags; |
623 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
624 |
BlockDriver *drv, *proto_drv; |
625 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
626 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
627 |
uint64_t bs_sectors; |
628 |
uint8_t * buf = NULL;
|
629 |
const uint8_t *buf1;
|
630 |
BlockDriverInfo bdi; |
631 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
632 |
QEMUOptionParameter *out_baseimg_param; |
633 |
char *options = NULL; |
634 |
const char *snapshot_name = NULL; |
635 |
float local_progress;
|
636 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
637 |
|
638 |
fmt = NULL;
|
639 |
out_fmt = "raw";
|
640 |
cache = "unsafe";
|
641 |
out_baseimg = NULL;
|
642 |
compress = 0;
|
643 |
for(;;) {
|
644 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:");
|
645 |
if (c == -1) { |
646 |
break;
|
647 |
} |
648 |
switch(c) {
|
649 |
case '?': |
650 |
case 'h': |
651 |
help(); |
652 |
break;
|
653 |
case 'f': |
654 |
fmt = optarg; |
655 |
break;
|
656 |
case 'O': |
657 |
out_fmt = optarg; |
658 |
break;
|
659 |
case 'B': |
660 |
out_baseimg = optarg; |
661 |
break;
|
662 |
case 'c': |
663 |
compress = 1;
|
664 |
break;
|
665 |
case 'e': |
666 |
error_report("option -e is deprecated, please use \'-o "
|
667 |
"encryption\' instead!");
|
668 |
return 1; |
669 |
case '6': |
670 |
error_report("option -6 is deprecated, please use \'-o "
|
671 |
"compat6\' instead!");
|
672 |
return 1; |
673 |
case 'o': |
674 |
options = optarg; |
675 |
break;
|
676 |
case 's': |
677 |
snapshot_name = optarg; |
678 |
break;
|
679 |
case 'S': |
680 |
{ |
681 |
int64_t sval; |
682 |
char *end;
|
683 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
684 |
if (sval < 0 || *end) { |
685 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
686 |
return 1; |
687 |
} |
688 |
|
689 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
690 |
break;
|
691 |
} |
692 |
case 'p': |
693 |
progress = 1;
|
694 |
break;
|
695 |
case 't': |
696 |
cache = optarg; |
697 |
break;
|
698 |
} |
699 |
} |
700 |
|
701 |
bs_n = argc - optind - 1;
|
702 |
if (bs_n < 1) { |
703 |
help(); |
704 |
} |
705 |
|
706 |
out_filename = argv[argc - 1];
|
707 |
|
708 |
if (options && !strcmp(options, "?")) { |
709 |
ret = print_block_option_help(out_filename, out_fmt); |
710 |
goto out;
|
711 |
} |
712 |
|
713 |
if (bs_n > 1 && out_baseimg) { |
714 |
error_report("-B makes no sense when concatenating multiple input "
|
715 |
"images");
|
716 |
ret = -1;
|
717 |
goto out;
|
718 |
} |
719 |
|
720 |
qemu_progress_init(progress, 2.0); |
721 |
qemu_progress_print(0, 100); |
722 |
|
723 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
724 |
|
725 |
total_sectors = 0;
|
726 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
727 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
728 |
if (!bs[bs_i]) {
|
729 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
730 |
ret = -1;
|
731 |
goto out;
|
732 |
} |
733 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
734 |
total_sectors += bs_sectors; |
735 |
} |
736 |
|
737 |
if (snapshot_name != NULL) { |
738 |
if (bs_n > 1) { |
739 |
error_report("No support for concatenating multiple snapshot");
|
740 |
ret = -1;
|
741 |
goto out;
|
742 |
} |
743 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
744 |
error_report("Failed to load snapshot");
|
745 |
ret = -1;
|
746 |
goto out;
|
747 |
} |
748 |
} |
749 |
|
750 |
/* Find driver and parse its options */
|
751 |
drv = bdrv_find_format(out_fmt); |
752 |
if (!drv) {
|
753 |
error_report("Unknown file format '%s'", out_fmt);
|
754 |
ret = -1;
|
755 |
goto out;
|
756 |
} |
757 |
|
758 |
proto_drv = bdrv_find_protocol(out_filename); |
759 |
if (!proto_drv) {
|
760 |
error_report("Unknown protocol '%s'", out_filename);
|
761 |
ret = -1;
|
762 |
goto out;
|
763 |
} |
764 |
|
765 |
create_options = append_option_parameters(create_options, |
766 |
drv->create_options); |
767 |
create_options = append_option_parameters(create_options, |
768 |
proto_drv->create_options); |
769 |
|
770 |
if (options) {
|
771 |
param = parse_option_parameters(options, create_options, param); |
772 |
if (param == NULL) { |
773 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
774 |
ret = -1;
|
775 |
goto out;
|
776 |
} |
777 |
} else {
|
778 |
param = parse_option_parameters("", create_options, param);
|
779 |
} |
780 |
|
781 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
782 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
783 |
if (ret < 0) { |
784 |
goto out;
|
785 |
} |
786 |
|
787 |
/* Get backing file name if -o backing_file was used */
|
788 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
789 |
if (out_baseimg_param) {
|
790 |
out_baseimg = out_baseimg_param->value.s; |
791 |
} |
792 |
|
793 |
/* Check if compression is supported */
|
794 |
if (compress) {
|
795 |
QEMUOptionParameter *encryption = |
796 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
797 |
QEMUOptionParameter *preallocation = |
798 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
799 |
|
800 |
if (!drv->bdrv_write_compressed) {
|
801 |
error_report("Compression not supported for this file format");
|
802 |
ret = -1;
|
803 |
goto out;
|
804 |
} |
805 |
|
806 |
if (encryption && encryption->value.n) {
|
807 |
error_report("Compression and encryption not supported at "
|
808 |
"the same time");
|
809 |
ret = -1;
|
810 |
goto out;
|
811 |
} |
812 |
|
813 |
if (preallocation && preallocation->value.s
|
814 |
&& strcmp(preallocation->value.s, "off"))
|
815 |
{ |
816 |
error_report("Compression and preallocation not supported at "
|
817 |
"the same time");
|
818 |
ret = -1;
|
819 |
goto out;
|
820 |
} |
821 |
} |
822 |
|
823 |
/* Create the new image */
|
824 |
ret = bdrv_create(drv, out_filename, param); |
825 |
if (ret < 0) { |
826 |
if (ret == -ENOTSUP) {
|
827 |
error_report("Formatting not supported for file format '%s'",
|
828 |
out_fmt); |
829 |
} else if (ret == -EFBIG) { |
830 |
error_report("The image size is too large for file format '%s'",
|
831 |
out_fmt); |
832 |
} else {
|
833 |
error_report("%s: error while converting %s: %s",
|
834 |
out_filename, out_fmt, strerror(-ret)); |
835 |
} |
836 |
goto out;
|
837 |
} |
838 |
|
839 |
flags = BDRV_O_RDWR; |
840 |
ret = bdrv_parse_cache_flags(cache, &flags); |
841 |
if (ret < 0) { |
842 |
error_report("Invalid cache option: %s", cache);
|
843 |
return -1; |
844 |
} |
845 |
|
846 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags); |
847 |
if (!out_bs) {
|
848 |
ret = -1;
|
849 |
goto out;
|
850 |
} |
851 |
|
852 |
bs_i = 0;
|
853 |
bs_offset = 0;
|
854 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
855 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
856 |
|
857 |
if (compress) {
|
858 |
ret = bdrv_get_info(out_bs, &bdi); |
859 |
if (ret < 0) { |
860 |
error_report("could not get block driver info");
|
861 |
goto out;
|
862 |
} |
863 |
cluster_size = bdi.cluster_size; |
864 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
865 |
error_report("invalid cluster size");
|
866 |
ret = -1;
|
867 |
goto out;
|
868 |
} |
869 |
cluster_sectors = cluster_size >> 9;
|
870 |
sector_num = 0;
|
871 |
|
872 |
nb_sectors = total_sectors; |
873 |
local_progress = (float)100 / |
874 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
875 |
|
876 |
for(;;) {
|
877 |
int64_t bs_num; |
878 |
int remainder;
|
879 |
uint8_t *buf2; |
880 |
|
881 |
nb_sectors = total_sectors - sector_num; |
882 |
if (nb_sectors <= 0) |
883 |
break;
|
884 |
if (nb_sectors >= cluster_sectors)
|
885 |
n = cluster_sectors; |
886 |
else
|
887 |
n = nb_sectors; |
888 |
|
889 |
bs_num = sector_num - bs_offset; |
890 |
assert (bs_num >= 0);
|
891 |
remainder = n; |
892 |
buf2 = buf; |
893 |
while (remainder > 0) { |
894 |
int nlow;
|
895 |
while (bs_num == bs_sectors) {
|
896 |
bs_i++; |
897 |
assert (bs_i < bs_n); |
898 |
bs_offset += bs_sectors; |
899 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
900 |
bs_num = 0;
|
901 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
902 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
903 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
904 |
} |
905 |
assert (bs_num < bs_sectors); |
906 |
|
907 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
908 |
|
909 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
910 |
if (ret < 0) { |
911 |
error_report("error while reading sector %" PRId64 ": %s", |
912 |
bs_num, strerror(-ret)); |
913 |
goto out;
|
914 |
} |
915 |
|
916 |
buf2 += nlow * 512;
|
917 |
bs_num += nlow; |
918 |
|
919 |
remainder -= nlow; |
920 |
} |
921 |
assert (remainder == 0);
|
922 |
|
923 |
if (n < cluster_sectors) {
|
924 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
925 |
} |
926 |
if (!buffer_is_zero(buf, cluster_size)) {
|
927 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
928 |
cluster_sectors); |
929 |
if (ret != 0) { |
930 |
error_report("error while compressing sector %" PRId64
|
931 |
": %s", sector_num, strerror(-ret));
|
932 |
goto out;
|
933 |
} |
934 |
} |
935 |
sector_num += n; |
936 |
qemu_progress_print(local_progress, 100);
|
937 |
} |
938 |
/* signal EOF to align */
|
939 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
940 |
} else {
|
941 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
942 |
|
943 |
sector_num = 0; // total number of sectors converted so far |
944 |
nb_sectors = total_sectors - sector_num; |
945 |
local_progress = (float)100 / |
946 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
947 |
|
948 |
for(;;) {
|
949 |
nb_sectors = total_sectors - sector_num; |
950 |
if (nb_sectors <= 0) { |
951 |
break;
|
952 |
} |
953 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
954 |
n = (IO_BUF_SIZE / 512);
|
955 |
} else {
|
956 |
n = nb_sectors; |
957 |
} |
958 |
|
959 |
while (sector_num - bs_offset >= bs_sectors) {
|
960 |
bs_i ++; |
961 |
assert (bs_i < bs_n); |
962 |
bs_offset += bs_sectors; |
963 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
964 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
965 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
966 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
967 |
} |
968 |
|
969 |
if (n > bs_offset + bs_sectors - sector_num) {
|
970 |
n = bs_offset + bs_sectors - sector_num; |
971 |
} |
972 |
|
973 |
if (has_zero_init) {
|
974 |
/* If the output image is being created as a copy on write image,
|
975 |
assume that sectors which are unallocated in the input image
|
976 |
are present in both the output's and input's base images (no
|
977 |
need to copy them). */
|
978 |
if (out_baseimg) {
|
979 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
980 |
n, &n1)) { |
981 |
sector_num += n1; |
982 |
continue;
|
983 |
} |
984 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
985 |
only those as they may be followed by unallocated sectors. */
|
986 |
n = n1; |
987 |
} |
988 |
} else {
|
989 |
n1 = n; |
990 |
} |
991 |
|
992 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
993 |
if (ret < 0) { |
994 |
error_report("error while reading sector %" PRId64 ": %s", |
995 |
sector_num - bs_offset, strerror(-ret)); |
996 |
goto out;
|
997 |
} |
998 |
/* NOTE: at the same time we convert, we do not write zero
|
999 |
sectors to have a chance to compress the image. Ideally, we
|
1000 |
should add a specific call to have the info to go faster */
|
1001 |
buf1 = buf; |
1002 |
while (n > 0) { |
1003 |
/* If the output image is being created as a copy on write image,
|
1004 |
copy all sectors even the ones containing only NUL bytes,
|
1005 |
because they may differ from the sectors in the base image.
|
1006 |
|
1007 |
If the output is to a host device, we also write out
|
1008 |
sectors that are entirely 0, since whatever data was
|
1009 |
already there is garbage, not 0s. */
|
1010 |
if (!has_zero_init || out_baseimg ||
|
1011 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1012 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1013 |
if (ret < 0) { |
1014 |
error_report("error while writing sector %" PRId64
|
1015 |
": %s", sector_num, strerror(-ret));
|
1016 |
goto out;
|
1017 |
} |
1018 |
} |
1019 |
sector_num += n1; |
1020 |
n -= n1; |
1021 |
buf1 += n1 * 512;
|
1022 |
} |
1023 |
qemu_progress_print(local_progress, 100);
|
1024 |
} |
1025 |
} |
1026 |
out:
|
1027 |
qemu_progress_end(); |
1028 |
free_option_parameters(create_options); |
1029 |
free_option_parameters(param); |
1030 |
qemu_vfree(buf); |
1031 |
if (out_bs) {
|
1032 |
bdrv_delete(out_bs); |
1033 |
} |
1034 |
if (bs) {
|
1035 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1036 |
if (bs[bs_i]) {
|
1037 |
bdrv_delete(bs[bs_i]); |
1038 |
} |
1039 |
} |
1040 |
g_free(bs); |
1041 |
} |
1042 |
if (ret) {
|
1043 |
return 1; |
1044 |
} |
1045 |
return 0; |
1046 |
} |
1047 |
|
1048 |
|
1049 |
static void dump_snapshots(BlockDriverState *bs) |
1050 |
{ |
1051 |
QEMUSnapshotInfo *sn_tab, *sn; |
1052 |
int nb_sns, i;
|
1053 |
char buf[256]; |
1054 |
|
1055 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1056 |
if (nb_sns <= 0) |
1057 |
return;
|
1058 |
printf("Snapshot list:\n");
|
1059 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1060 |
for(i = 0; i < nb_sns; i++) { |
1061 |
sn = &sn_tab[i]; |
1062 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1063 |
} |
1064 |
g_free(sn_tab); |
1065 |
} |
1066 |
|
1067 |
static int img_info(int argc, char **argv) |
1068 |
{ |
1069 |
int c;
|
1070 |
const char *filename, *fmt; |
1071 |
BlockDriverState *bs; |
1072 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
1073 |
uint64_t total_sectors; |
1074 |
int64_t allocated_size; |
1075 |
char backing_filename[1024]; |
1076 |
char backing_filename2[1024]; |
1077 |
BlockDriverInfo bdi; |
1078 |
|
1079 |
fmt = NULL;
|
1080 |
for(;;) {
|
1081 |
c = getopt(argc, argv, "f:h");
|
1082 |
if (c == -1) { |
1083 |
break;
|
1084 |
} |
1085 |
switch(c) {
|
1086 |
case '?': |
1087 |
case 'h': |
1088 |
help(); |
1089 |
break;
|
1090 |
case 'f': |
1091 |
fmt = optarg; |
1092 |
break;
|
1093 |
} |
1094 |
} |
1095 |
if (optind >= argc) {
|
1096 |
help(); |
1097 |
} |
1098 |
filename = argv[optind++]; |
1099 |
|
1100 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
1101 |
if (!bs) {
|
1102 |
return 1; |
1103 |
} |
1104 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
1105 |
bdrv_get_geometry(bs, &total_sectors); |
1106 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
1107 |
allocated_size = bdrv_get_allocated_file_size(bs); |
1108 |
if (allocated_size < 0) { |
1109 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
1110 |
} else {
|
1111 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
1112 |
allocated_size); |
1113 |
} |
1114 |
printf("image: %s\n"
|
1115 |
"file format: %s\n"
|
1116 |
"virtual size: %s (%" PRId64 " bytes)\n" |
1117 |
"disk size: %s\n",
|
1118 |
filename, fmt_name, size_buf, |
1119 |
(total_sectors * 512),
|
1120 |
dsize_buf); |
1121 |
if (bdrv_is_encrypted(bs)) {
|
1122 |
printf("encrypted: yes\n");
|
1123 |
} |
1124 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
1125 |
if (bdi.cluster_size != 0) { |
1126 |
printf("cluster_size: %d\n", bdi.cluster_size);
|
1127 |
} |
1128 |
} |
1129 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
1130 |
if (backing_filename[0] != '\0') { |
1131 |
path_combine(backing_filename2, sizeof(backing_filename2),
|
1132 |
filename, backing_filename); |
1133 |
printf("backing file: %s (actual path: %s)\n",
|
1134 |
backing_filename, |
1135 |
backing_filename2); |
1136 |
} |
1137 |
dump_snapshots(bs); |
1138 |
bdrv_delete(bs); |
1139 |
return 0; |
1140 |
} |
1141 |
|
1142 |
#define SNAPSHOT_LIST 1 |
1143 |
#define SNAPSHOT_CREATE 2 |
1144 |
#define SNAPSHOT_APPLY 3 |
1145 |
#define SNAPSHOT_DELETE 4 |
1146 |
|
1147 |
static int img_snapshot(int argc, char **argv) |
1148 |
{ |
1149 |
BlockDriverState *bs; |
1150 |
QEMUSnapshotInfo sn; |
1151 |
char *filename, *snapshot_name = NULL; |
1152 |
int c, ret = 0, bdrv_oflags; |
1153 |
int action = 0; |
1154 |
qemu_timeval tv; |
1155 |
|
1156 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
1157 |
/* Parse commandline parameters */
|
1158 |
for(;;) {
|
1159 |
c = getopt(argc, argv, "la:c:d:h");
|
1160 |
if (c == -1) { |
1161 |
break;
|
1162 |
} |
1163 |
switch(c) {
|
1164 |
case '?': |
1165 |
case 'h': |
1166 |
help(); |
1167 |
return 0; |
1168 |
case 'l': |
1169 |
if (action) {
|
1170 |
help(); |
1171 |
return 0; |
1172 |
} |
1173 |
action = SNAPSHOT_LIST; |
1174 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
1175 |
break;
|
1176 |
case 'a': |
1177 |
if (action) {
|
1178 |
help(); |
1179 |
return 0; |
1180 |
} |
1181 |
action = SNAPSHOT_APPLY; |
1182 |
snapshot_name = optarg; |
1183 |
break;
|
1184 |
case 'c': |
1185 |
if (action) {
|
1186 |
help(); |
1187 |
return 0; |
1188 |
} |
1189 |
action = SNAPSHOT_CREATE; |
1190 |
snapshot_name = optarg; |
1191 |
break;
|
1192 |
case 'd': |
1193 |
if (action) {
|
1194 |
help(); |
1195 |
return 0; |
1196 |
} |
1197 |
action = SNAPSHOT_DELETE; |
1198 |
snapshot_name = optarg; |
1199 |
break;
|
1200 |
} |
1201 |
} |
1202 |
|
1203 |
if (optind >= argc) {
|
1204 |
help(); |
1205 |
} |
1206 |
filename = argv[optind++]; |
1207 |
|
1208 |
/* Open the image */
|
1209 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags);
|
1210 |
if (!bs) {
|
1211 |
return 1; |
1212 |
} |
1213 |
|
1214 |
/* Perform the requested action */
|
1215 |
switch(action) {
|
1216 |
case SNAPSHOT_LIST:
|
1217 |
dump_snapshots(bs); |
1218 |
break;
|
1219 |
|
1220 |
case SNAPSHOT_CREATE:
|
1221 |
memset(&sn, 0, sizeof(sn)); |
1222 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
1223 |
|
1224 |
qemu_gettimeofday(&tv); |
1225 |
sn.date_sec = tv.tv_sec; |
1226 |
sn.date_nsec = tv.tv_usec * 1000;
|
1227 |
|
1228 |
ret = bdrv_snapshot_create(bs, &sn); |
1229 |
if (ret) {
|
1230 |
error_report("Could not create snapshot '%s': %d (%s)",
|
1231 |
snapshot_name, ret, strerror(-ret)); |
1232 |
} |
1233 |
break;
|
1234 |
|
1235 |
case SNAPSHOT_APPLY:
|
1236 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
1237 |
if (ret) {
|
1238 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
1239 |
snapshot_name, ret, strerror(-ret)); |
1240 |
} |
1241 |
break;
|
1242 |
|
1243 |
case SNAPSHOT_DELETE:
|
1244 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
1245 |
if (ret) {
|
1246 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
1247 |
snapshot_name, ret, strerror(-ret)); |
1248 |
} |
1249 |
break;
|
1250 |
} |
1251 |
|
1252 |
/* Cleanup */
|
1253 |
bdrv_delete(bs); |
1254 |
if (ret) {
|
1255 |
return 1; |
1256 |
} |
1257 |
return 0; |
1258 |
} |
1259 |
|
1260 |
static int img_rebase(int argc, char **argv) |
1261 |
{ |
1262 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
1263 |
BlockDriver *old_backing_drv, *new_backing_drv; |
1264 |
char *filename;
|
1265 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
1266 |
int c, flags, ret;
|
1267 |
int unsafe = 0; |
1268 |
int progress = 0; |
1269 |
|
1270 |
/* Parse commandline parameters */
|
1271 |
fmt = NULL;
|
1272 |
cache = BDRV_DEFAULT_CACHE; |
1273 |
out_baseimg = NULL;
|
1274 |
out_basefmt = NULL;
|
1275 |
for(;;) {
|
1276 |
c = getopt(argc, argv, "uhf:F:b:pt:");
|
1277 |
if (c == -1) { |
1278 |
break;
|
1279 |
} |
1280 |
switch(c) {
|
1281 |
case '?': |
1282 |
case 'h': |
1283 |
help(); |
1284 |
return 0; |
1285 |
case 'f': |
1286 |
fmt = optarg; |
1287 |
break;
|
1288 |
case 'F': |
1289 |
out_basefmt = optarg; |
1290 |
break;
|
1291 |
case 'b': |
1292 |
out_baseimg = optarg; |
1293 |
break;
|
1294 |
case 'u': |
1295 |
unsafe = 1;
|
1296 |
break;
|
1297 |
case 'p': |
1298 |
progress = 1;
|
1299 |
break;
|
1300 |
case 't': |
1301 |
cache = optarg; |
1302 |
break;
|
1303 |
} |
1304 |
} |
1305 |
|
1306 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
1307 |
help(); |
1308 |
} |
1309 |
filename = argv[optind++]; |
1310 |
|
1311 |
qemu_progress_init(progress, 2.0); |
1312 |
qemu_progress_print(0, 100); |
1313 |
|
1314 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
1315 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1316 |
if (ret < 0) { |
1317 |
error_report("Invalid cache option: %s", cache);
|
1318 |
return -1; |
1319 |
} |
1320 |
|
1321 |
/*
|
1322 |
* Open the images.
|
1323 |
*
|
1324 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
1325 |
* the reference to a renamed or moved backing file.
|
1326 |
*/
|
1327 |
bs = bdrv_new_open(filename, fmt, flags); |
1328 |
if (!bs) {
|
1329 |
return 1; |
1330 |
} |
1331 |
|
1332 |
/* Find the right drivers for the backing files */
|
1333 |
old_backing_drv = NULL;
|
1334 |
new_backing_drv = NULL;
|
1335 |
|
1336 |
if (!unsafe && bs->backing_format[0] != '\0') { |
1337 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
1338 |
if (old_backing_drv == NULL) { |
1339 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
1340 |
ret = -1;
|
1341 |
goto out;
|
1342 |
} |
1343 |
} |
1344 |
|
1345 |
if (out_basefmt != NULL) { |
1346 |
new_backing_drv = bdrv_find_format(out_basefmt); |
1347 |
if (new_backing_drv == NULL) { |
1348 |
error_report("Invalid format name: '%s'", out_basefmt);
|
1349 |
ret = -1;
|
1350 |
goto out;
|
1351 |
} |
1352 |
} |
1353 |
|
1354 |
/* For safe rebasing we need to compare old and new backing file */
|
1355 |
if (unsafe) {
|
1356 |
/* Make the compiler happy */
|
1357 |
bs_old_backing = NULL;
|
1358 |
bs_new_backing = NULL;
|
1359 |
} else {
|
1360 |
char backing_name[1024]; |
1361 |
|
1362 |
bs_old_backing = bdrv_new("old_backing");
|
1363 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
1364 |
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1365 |
old_backing_drv); |
1366 |
if (ret) {
|
1367 |
error_report("Could not open old backing file '%s'", backing_name);
|
1368 |
goto out;
|
1369 |
} |
1370 |
|
1371 |
bs_new_backing = bdrv_new("new_backing");
|
1372 |
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
1373 |
new_backing_drv); |
1374 |
if (ret) {
|
1375 |
error_report("Could not open new backing file '%s'", out_baseimg);
|
1376 |
goto out;
|
1377 |
} |
1378 |
} |
1379 |
|
1380 |
/*
|
1381 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
1382 |
* accesses go to the backing file. We must therefore compare this cluster
|
1383 |
* in the old and new backing file, and if they differ we need to copy it
|
1384 |
* from the old backing file into the COW file.
|
1385 |
*
|
1386 |
* If qemu-img crashes during this step, no harm is done. The content of
|
1387 |
* the image is the same as the original one at any time.
|
1388 |
*/
|
1389 |
if (!unsafe) {
|
1390 |
uint64_t num_sectors; |
1391 |
uint64_t old_backing_num_sectors; |
1392 |
uint64_t new_backing_num_sectors; |
1393 |
uint64_t sector; |
1394 |
int n;
|
1395 |
uint8_t * buf_old; |
1396 |
uint8_t * buf_new; |
1397 |
float local_progress;
|
1398 |
|
1399 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
1400 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
1401 |
|
1402 |
bdrv_get_geometry(bs, &num_sectors); |
1403 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
1404 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
1405 |
|
1406 |
local_progress = (float)100 / |
1407 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
1408 |
for (sector = 0; sector < num_sectors; sector += n) { |
1409 |
|
1410 |
/* How many sectors can we handle with the next read? */
|
1411 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
1412 |
n = (IO_BUF_SIZE / 512);
|
1413 |
} else {
|
1414 |
n = num_sectors - sector; |
1415 |
} |
1416 |
|
1417 |
/* If the cluster is allocated, we don't need to take action */
|
1418 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
1419 |
if (ret) {
|
1420 |
continue;
|
1421 |
} |
1422 |
|
1423 |
/*
|
1424 |
* Read old and new backing file and take into consideration that
|
1425 |
* backing files may be smaller than the COW image.
|
1426 |
*/
|
1427 |
if (sector >= old_backing_num_sectors) {
|
1428 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
1429 |
} else {
|
1430 |
if (sector + n > old_backing_num_sectors) {
|
1431 |
n = old_backing_num_sectors - sector; |
1432 |
} |
1433 |
|
1434 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1435 |
if (ret < 0) { |
1436 |
error_report("error while reading from old backing file");
|
1437 |
goto out;
|
1438 |
} |
1439 |
} |
1440 |
|
1441 |
if (sector >= new_backing_num_sectors) {
|
1442 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
1443 |
} else {
|
1444 |
if (sector + n > new_backing_num_sectors) {
|
1445 |
n = new_backing_num_sectors - sector; |
1446 |
} |
1447 |
|
1448 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1449 |
if (ret < 0) { |
1450 |
error_report("error while reading from new backing file");
|
1451 |
goto out;
|
1452 |
} |
1453 |
} |
1454 |
|
1455 |
/* If they differ, we need to write to the COW file */
|
1456 |
uint64_t written = 0;
|
1457 |
|
1458 |
while (written < n) {
|
1459 |
int pnum;
|
1460 |
|
1461 |
if (compare_sectors(buf_old + written * 512, |
1462 |
buf_new + written * 512, n - written, &pnum))
|
1463 |
{ |
1464 |
ret = bdrv_write(bs, sector + written, |
1465 |
buf_old + written * 512, pnum);
|
1466 |
if (ret < 0) { |
1467 |
error_report("Error while writing to COW image: %s",
|
1468 |
strerror(-ret)); |
1469 |
goto out;
|
1470 |
} |
1471 |
} |
1472 |
|
1473 |
written += pnum; |
1474 |
} |
1475 |
qemu_progress_print(local_progress, 100);
|
1476 |
} |
1477 |
|
1478 |
qemu_vfree(buf_old); |
1479 |
qemu_vfree(buf_new); |
1480 |
} |
1481 |
|
1482 |
/*
|
1483 |
* Change the backing file. All clusters that are different from the old
|
1484 |
* backing file are overwritten in the COW file now, so the visible content
|
1485 |
* doesn't change when we switch the backing file.
|
1486 |
*/
|
1487 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
1488 |
if (ret == -ENOSPC) {
|
1489 |
error_report("Could not change the backing file to '%s': No "
|
1490 |
"space left in the file header", out_baseimg);
|
1491 |
} else if (ret < 0) { |
1492 |
error_report("Could not change the backing file to '%s': %s",
|
1493 |
out_baseimg, strerror(-ret)); |
1494 |
} |
1495 |
|
1496 |
qemu_progress_print(100, 0); |
1497 |
/*
|
1498 |
* TODO At this point it is possible to check if any clusters that are
|
1499 |
* allocated in the COW file are the same in the backing file. If so, they
|
1500 |
* could be dropped from the COW file. Don't do this before switching the
|
1501 |
* backing file, in case of a crash this would lead to corruption.
|
1502 |
*/
|
1503 |
out:
|
1504 |
qemu_progress_end(); |
1505 |
/* Cleanup */
|
1506 |
if (!unsafe) {
|
1507 |
if (bs_old_backing != NULL) { |
1508 |
bdrv_delete(bs_old_backing); |
1509 |
} |
1510 |
if (bs_new_backing != NULL) { |
1511 |
bdrv_delete(bs_new_backing); |
1512 |
} |
1513 |
} |
1514 |
|
1515 |
bdrv_delete(bs); |
1516 |
if (ret) {
|
1517 |
return 1; |
1518 |
} |
1519 |
return 0; |
1520 |
} |
1521 |
|
1522 |
static int img_resize(int argc, char **argv) |
1523 |
{ |
1524 |
int c, ret, relative;
|
1525 |
const char *filename, *fmt, *size; |
1526 |
int64_t n, total_size; |
1527 |
BlockDriverState *bs = NULL;
|
1528 |
QEMUOptionParameter *param; |
1529 |
QEMUOptionParameter resize_options[] = { |
1530 |
{ |
1531 |
.name = BLOCK_OPT_SIZE, |
1532 |
.type = OPT_SIZE, |
1533 |
.help = "Virtual disk size"
|
1534 |
}, |
1535 |
{ NULL }
|
1536 |
}; |
1537 |
|
1538 |
/* Remove size from argv manually so that negative numbers are not treated
|
1539 |
* as options by getopt. */
|
1540 |
if (argc < 3) { |
1541 |
help(); |
1542 |
return 1; |
1543 |
} |
1544 |
|
1545 |
size = argv[--argc]; |
1546 |
|
1547 |
/* Parse getopt arguments */
|
1548 |
fmt = NULL;
|
1549 |
for(;;) {
|
1550 |
c = getopt(argc, argv, "f:h");
|
1551 |
if (c == -1) { |
1552 |
break;
|
1553 |
} |
1554 |
switch(c) {
|
1555 |
case '?': |
1556 |
case 'h': |
1557 |
help(); |
1558 |
break;
|
1559 |
case 'f': |
1560 |
fmt = optarg; |
1561 |
break;
|
1562 |
} |
1563 |
} |
1564 |
if (optind >= argc) {
|
1565 |
help(); |
1566 |
} |
1567 |
filename = argv[optind++]; |
1568 |
|
1569 |
/* Choose grow, shrink, or absolute resize mode */
|
1570 |
switch (size[0]) { |
1571 |
case '+': |
1572 |
relative = 1;
|
1573 |
size++; |
1574 |
break;
|
1575 |
case '-': |
1576 |
relative = -1;
|
1577 |
size++; |
1578 |
break;
|
1579 |
default:
|
1580 |
relative = 0;
|
1581 |
break;
|
1582 |
} |
1583 |
|
1584 |
/* Parse size */
|
1585 |
param = parse_option_parameters("", resize_options, NULL); |
1586 |
if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) {
|
1587 |
/* Error message already printed when size parsing fails */
|
1588 |
ret = -1;
|
1589 |
goto out;
|
1590 |
} |
1591 |
n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; |
1592 |
free_option_parameters(param); |
1593 |
|
1594 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
1595 |
if (!bs) {
|
1596 |
ret = -1;
|
1597 |
goto out;
|
1598 |
} |
1599 |
|
1600 |
if (relative) {
|
1601 |
total_size = bdrv_getlength(bs) + n * relative; |
1602 |
} else {
|
1603 |
total_size = n; |
1604 |
} |
1605 |
if (total_size <= 0) { |
1606 |
error_report("New image size must be positive");
|
1607 |
ret = -1;
|
1608 |
goto out;
|
1609 |
} |
1610 |
|
1611 |
ret = bdrv_truncate(bs, total_size); |
1612 |
switch (ret) {
|
1613 |
case 0: |
1614 |
printf("Image resized.\n");
|
1615 |
break;
|
1616 |
case -ENOTSUP:
|
1617 |
error_report("This image format does not support resize");
|
1618 |
break;
|
1619 |
case -EACCES:
|
1620 |
error_report("Image is read-only");
|
1621 |
break;
|
1622 |
default:
|
1623 |
error_report("Error resizing image (%d)", -ret);
|
1624 |
break;
|
1625 |
} |
1626 |
out:
|
1627 |
if (bs) {
|
1628 |
bdrv_delete(bs); |
1629 |
} |
1630 |
if (ret) {
|
1631 |
return 1; |
1632 |
} |
1633 |
return 0; |
1634 |
} |
1635 |
|
1636 |
static const img_cmd_t img_cmds[] = { |
1637 |
#define DEF(option, callback, arg_string) \
|
1638 |
{ option, callback }, |
1639 |
#include "qemu-img-cmds.h" |
1640 |
#undef DEF
|
1641 |
#undef GEN_DOCS
|
1642 |
{ NULL, NULL, }, |
1643 |
}; |
1644 |
|
1645 |
int main(int argc, char **argv) |
1646 |
{ |
1647 |
const img_cmd_t *cmd;
|
1648 |
const char *cmdname; |
1649 |
|
1650 |
error_set_progname(argv[0]);
|
1651 |
|
1652 |
bdrv_init(); |
1653 |
if (argc < 2) |
1654 |
help(); |
1655 |
cmdname = argv[1];
|
1656 |
argc--; argv++; |
1657 |
|
1658 |
/* find the command */
|
1659 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
1660 |
if (!strcmp(cmdname, cmd->name)) {
|
1661 |
return cmd->handler(argc, argv);
|
1662 |
} |
1663 |
} |
1664 |
|
1665 |
/* not found */
|
1666 |
help(); |
1667 |
return 0; |
1668 |
} |