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Commit | Line | Data |
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ea2384d3 | 1 | /* |
fb43f4dd | 2 | * QEMU disk image utility |
5fafdf24 | 3 | * |
68d0f70e | 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
5fafdf24 | 5 | * |
ea2384d3 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
9ea2ea71 | 25 | #include "qemu-option.h" |
53f76e58 | 26 | #include "qemu-error.h" |
f7b4a940 | 27 | #include "osdep.h" |
dc786bc9 | 28 | #include "sysemu.h" |
ec36ba14 | 29 | #include "block_int.h" |
9230eaf6 | 30 | #include <stdio.h> |
ea2384d3 | 31 | |
e8445331 FB |
32 | #ifdef _WIN32 |
33 | #include <windows.h> | |
34 | #endif | |
35 | ||
c227f099 | 36 | typedef struct img_cmd_t { |
153859be SB |
37 | const char *name; |
38 | int (*handler)(int argc, char **argv); | |
c227f099 | 39 | } img_cmd_t; |
153859be | 40 | |
137519ce | 41 | /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ |
adfe078e | 42 | #define BDRV_O_FLAGS BDRV_O_CACHE_WB |
137519ce | 43 | |
ea2384d3 FB |
44 | static void format_print(void *opaque, const char *name) |
45 | { | |
46 | printf(" %s", name); | |
47 | } | |
48 | ||
d2c639d6 | 49 | /* Please keep in synch with qemu-img.texi */ |
3f379ab1 | 50 | static void help(void) |
ea2384d3 | 51 | { |
e00291c0 PB |
52 | const char *help_msg = |
53 | "qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" | |
3f020d70 | 54 | "usage: qemu-img command [command options]\n" |
55 | "QEMU disk image utility\n" | |
56 | "\n" | |
57 | "Command syntax:\n" | |
153859be SB |
58 | #define DEF(option, callback, arg_string) \ |
59 | " " arg_string "\n" | |
60 | #include "qemu-img-cmds.h" | |
61 | #undef DEF | |
62 | #undef GEN_DOCS | |
3f020d70 | 63 | "\n" |
64 | "Command parameters:\n" | |
65 | " 'filename' is a disk image filename\n" | |
66 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
67 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
68 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n" | |
69 | " and T (terabyte, 1024G) are supported. 'b' is ignored.\n" | |
70 | " 'output_filename' is the destination disk image filename\n" | |
71 | " 'output_fmt' is the destination format\n" | |
72 | " 'options' is a comma separated list of format specific options in a\n" | |
73 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
74 | " used format\n" | |
75 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
76 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
77 | " match exactly. The image doesn't need a working backing file before\n" | |
78 | " rebasing in this case (useful for renaming the backing file)\n" | |
79 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
80 | "\n" | |
81 | "Parameters to snapshot subcommand:\n" | |
82 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
83 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
84 | " '-c' creates a snapshot\n" | |
85 | " '-d' deletes a snapshot\n" | |
e00291c0 PB |
86 | " '-l' lists all snapshots in the given image\n"; |
87 | ||
88 | printf("%s\nSupported formats:", help_msg); | |
ea2384d3 FB |
89 | bdrv_iterate_format(format_print, NULL); |
90 | printf("\n"); | |
91 | exit(1); | |
92 | } | |
93 | ||
ea2384d3 FB |
94 | #if defined(WIN32) |
95 | /* XXX: put correct support for win32 */ | |
96 | static int read_password(char *buf, int buf_size) | |
97 | { | |
98 | int c, i; | |
99 | printf("Password: "); | |
100 | fflush(stdout); | |
101 | i = 0; | |
102 | for(;;) { | |
103 | c = getchar(); | |
104 | if (c == '\n') | |
105 | break; | |
106 | if (i < (buf_size - 1)) | |
107 | buf[i++] = c; | |
108 | } | |
109 | buf[i] = '\0'; | |
110 | return 0; | |
111 | } | |
112 | ||
113 | #else | |
114 | ||
115 | #include <termios.h> | |
116 | ||
117 | static struct termios oldtty; | |
118 | ||
119 | static void term_exit(void) | |
120 | { | |
121 | tcsetattr (0, TCSANOW, &oldtty); | |
122 | } | |
123 | ||
124 | static void term_init(void) | |
125 | { | |
126 | struct termios tty; | |
127 | ||
128 | tcgetattr (0, &tty); | |
129 | oldtty = tty; | |
130 | ||
131 | tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP | |
132 | |INLCR|IGNCR|ICRNL|IXON); | |
133 | tty.c_oflag |= OPOST; | |
134 | tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); | |
135 | tty.c_cflag &= ~(CSIZE|PARENB); | |
136 | tty.c_cflag |= CS8; | |
137 | tty.c_cc[VMIN] = 1; | |
138 | tty.c_cc[VTIME] = 0; | |
3b46e624 | 139 | |
ea2384d3 FB |
140 | tcsetattr (0, TCSANOW, &tty); |
141 | ||
142 | atexit(term_exit); | |
143 | } | |
144 | ||
3f379ab1 | 145 | static int read_password(char *buf, int buf_size) |
ea2384d3 FB |
146 | { |
147 | uint8_t ch; | |
148 | int i, ret; | |
149 | ||
150 | printf("password: "); | |
151 | fflush(stdout); | |
152 | term_init(); | |
153 | i = 0; | |
154 | for(;;) { | |
155 | ret = read(0, &ch, 1); | |
156 | if (ret == -1) { | |
157 | if (errno == EAGAIN || errno == EINTR) { | |
158 | continue; | |
159 | } else { | |
160 | ret = -1; | |
161 | break; | |
162 | } | |
163 | } else if (ret == 0) { | |
164 | ret = -1; | |
165 | break; | |
166 | } else { | |
167 | if (ch == '\r') { | |
168 | ret = 0; | |
169 | break; | |
170 | } | |
171 | if (i < (buf_size - 1)) | |
172 | buf[i++] = ch; | |
173 | } | |
174 | } | |
175 | term_exit(); | |
176 | buf[i] = '\0'; | |
177 | printf("\n"); | |
178 | return ret; | |
179 | } | |
180 | #endif | |
181 | ||
4ac8aacd JS |
182 | static int print_block_option_help(const char *filename, const char *fmt) |
183 | { | |
184 | BlockDriver *drv, *proto_drv; | |
185 | QEMUOptionParameter *create_options = NULL; | |
186 | ||
187 | /* Find driver and parse its options */ | |
188 | drv = bdrv_find_format(fmt); | |
189 | if (!drv) { | |
15654a6d | 190 | error_report("Unknown file format '%s'", fmt); |
4ac8aacd JS |
191 | return 1; |
192 | } | |
193 | ||
194 | proto_drv = bdrv_find_protocol(filename); | |
195 | if (!proto_drv) { | |
15654a6d | 196 | error_report("Unknown protocol '%s'", filename); |
4ac8aacd JS |
197 | return 1; |
198 | } | |
199 | ||
200 | create_options = append_option_parameters(create_options, | |
201 | drv->create_options); | |
202 | create_options = append_option_parameters(create_options, | |
203 | proto_drv->create_options); | |
204 | print_option_help(create_options); | |
205 | free_option_parameters(create_options); | |
206 | return 0; | |
207 | } | |
208 | ||
75c23805 | 209 | static BlockDriverState *bdrv_new_open(const char *filename, |
9bc378c1 | 210 | const char *fmt, |
f163d073 | 211 | int flags) |
75c23805 FB |
212 | { |
213 | BlockDriverState *bs; | |
214 | BlockDriver *drv; | |
215 | char password[256]; | |
216 | ||
217 | bs = bdrv_new(""); | |
c2abccec | 218 | if (!bs) { |
15654a6d | 219 | error_report("Not enough memory"); |
c2abccec MK |
220 | goto fail; |
221 | } | |
75c23805 FB |
222 | if (fmt) { |
223 | drv = bdrv_find_format(fmt); | |
c2abccec | 224 | if (!drv) { |
15654a6d | 225 | error_report("Unknown file format '%s'", fmt); |
c2abccec MK |
226 | goto fail; |
227 | } | |
75c23805 FB |
228 | } else { |
229 | drv = NULL; | |
230 | } | |
d6e9098e | 231 | if (bdrv_open(bs, filename, flags, drv) < 0) { |
15654a6d | 232 | error_report("Could not open '%s'", filename); |
c2abccec | 233 | goto fail; |
75c23805 FB |
234 | } |
235 | if (bdrv_is_encrypted(bs)) { | |
236 | printf("Disk image '%s' is encrypted.\n", filename); | |
c2abccec | 237 | if (read_password(password, sizeof(password)) < 0) { |
15654a6d | 238 | error_report("No password given"); |
c2abccec MK |
239 | goto fail; |
240 | } | |
241 | if (bdrv_set_key(bs, password) < 0) { | |
15654a6d | 242 | error_report("invalid password"); |
c2abccec MK |
243 | goto fail; |
244 | } | |
75c23805 FB |
245 | } |
246 | return bs; | |
c2abccec MK |
247 | fail: |
248 | if (bs) { | |
249 | bdrv_delete(bs); | |
250 | } | |
251 | return NULL; | |
75c23805 FB |
252 | } |
253 | ||
c2abccec | 254 | static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
eec77d9e JS |
255 | const char *base_filename, |
256 | const char *base_fmt) | |
efa84d43 | 257 | { |
efa84d43 KW |
258 | if (base_filename) { |
259 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { | |
15654a6d JS |
260 | error_report("Backing file not supported for file format '%s'", |
261 | fmt); | |
c2abccec | 262 | return -1; |
efa84d43 KW |
263 | } |
264 | } | |
265 | if (base_fmt) { | |
266 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { | |
15654a6d JS |
267 | error_report("Backing file format not supported for file " |
268 | "format '%s'", fmt); | |
c2abccec | 269 | return -1; |
efa84d43 KW |
270 | } |
271 | } | |
c2abccec | 272 | return 0; |
efa84d43 KW |
273 | } |
274 | ||
ea2384d3 FB |
275 | static int img_create(int argc, char **argv) |
276 | { | |
eec77d9e | 277 | int c, ret = 0; |
1da7cfbd | 278 | uint64_t img_size = -1; |
ea2384d3 | 279 | const char *fmt = "raw"; |
9230eaf6 | 280 | const char *base_fmt = NULL; |
ea2384d3 FB |
281 | const char *filename; |
282 | const char *base_filename = NULL; | |
9ea2ea71 | 283 | char *options = NULL; |
3b46e624 | 284 | |
ea2384d3 | 285 | for(;;) { |
9ea2ea71 | 286 | c = getopt(argc, argv, "F:b:f:he6o:"); |
b8fb60da | 287 | if (c == -1) { |
ea2384d3 | 288 | break; |
b8fb60da | 289 | } |
ea2384d3 | 290 | switch(c) { |
ef87394c | 291 | case '?': |
ea2384d3 FB |
292 | case 'h': |
293 | help(); | |
294 | break; | |
9230eaf6 AL |
295 | case 'F': |
296 | base_fmt = optarg; | |
297 | break; | |
ea2384d3 FB |
298 | case 'b': |
299 | base_filename = optarg; | |
300 | break; | |
301 | case 'f': | |
302 | fmt = optarg; | |
303 | break; | |
304 | case 'e': | |
15654a6d | 305 | error_report("qemu-img: option -e is deprecated, please use \'-o " |
eec77d9e JS |
306 | "encryption\' instead!"); |
307 | return 1; | |
d8871c5a | 308 | case '6': |
15654a6d | 309 | error_report("qemu-img: option -6 is deprecated, please use \'-o " |
eec77d9e JS |
310 | "compat6\' instead!"); |
311 | return 1; | |
9ea2ea71 KW |
312 | case 'o': |
313 | options = optarg; | |
314 | break; | |
ea2384d3 FB |
315 | } |
316 | } | |
9230eaf6 | 317 | |
b50cbabc | 318 | /* Get the filename */ |
b8fb60da | 319 | if (optind >= argc) { |
b50cbabc | 320 | help(); |
b8fb60da | 321 | } |
b50cbabc MK |
322 | filename = argv[optind++]; |
323 | ||
1da7cfbd JS |
324 | /* Get image size, if specified */ |
325 | if (optind < argc) { | |
326 | ssize_t sval; | |
327 | sval = strtosz_suffix(argv[optind++], NULL, STRTOSZ_DEFSUFFIX_B); | |
328 | if (sval < 0) { | |
15654a6d | 329 | error_report("Invalid image size specified! You may use k, M, G or " |
1da7cfbd | 330 | "T suffixes for "); |
15654a6d | 331 | error_report("kilobytes, megabytes, gigabytes and terabytes."); |
1da7cfbd JS |
332 | ret = -1; |
333 | goto out; | |
334 | } | |
335 | img_size = (uint64_t)sval; | |
336 | } | |
337 | ||
4ac8aacd JS |
338 | if (options && !strcmp(options, "?")) { |
339 | ret = print_block_option_help(filename, fmt); | |
340 | goto out; | |
341 | } | |
342 | ||
f88e1a42 JS |
343 | ret = bdrv_img_create(filename, fmt, base_filename, base_fmt, |
344 | options, img_size, BDRV_O_FLAGS); | |
c2abccec MK |
345 | out: |
346 | if (ret) { | |
347 | return 1; | |
348 | } | |
ea2384d3 FB |
349 | return 0; |
350 | } | |
351 | ||
e076f338 KW |
352 | /* |
353 | * Checks an image for consistency. Exit codes: | |
354 | * | |
355 | * 0 - Check completed, image is good | |
356 | * 1 - Check not completed because of internal errors | |
357 | * 2 - Check completed, image is corrupted | |
358 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
359 | */ | |
1585969c AL |
360 | static int img_check(int argc, char **argv) |
361 | { | |
362 | int c, ret; | |
363 | const char *filename, *fmt; | |
1585969c | 364 | BlockDriverState *bs; |
e076f338 | 365 | BdrvCheckResult result; |
1585969c AL |
366 | |
367 | fmt = NULL; | |
368 | for(;;) { | |
369 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 370 | if (c == -1) { |
1585969c | 371 | break; |
b8fb60da | 372 | } |
1585969c | 373 | switch(c) { |
ef87394c | 374 | case '?': |
1585969c AL |
375 | case 'h': |
376 | help(); | |
377 | break; | |
378 | case 'f': | |
379 | fmt = optarg; | |
380 | break; | |
381 | } | |
382 | } | |
b8fb60da | 383 | if (optind >= argc) { |
1585969c | 384 | help(); |
b8fb60da | 385 | } |
1585969c AL |
386 | filename = argv[optind++]; |
387 | ||
adfe078e | 388 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
c2abccec MK |
389 | if (!bs) { |
390 | return 1; | |
391 | } | |
e076f338 KW |
392 | ret = bdrv_check(bs, &result); |
393 | ||
394 | if (ret == -ENOTSUP) { | |
15654a6d | 395 | error_report("This image format does not support checks"); |
e076f338 KW |
396 | bdrv_delete(bs); |
397 | return 1; | |
398 | } | |
399 | ||
400 | if (!(result.corruptions || result.leaks || result.check_errors)) { | |
401 | printf("No errors were found on the image.\n"); | |
402 | } else { | |
403 | if (result.corruptions) { | |
404 | printf("\n%d errors were found on the image.\n" | |
405 | "Data may be corrupted, or further writes to the image " | |
406 | "may corrupt it.\n", | |
407 | result.corruptions); | |
408 | } | |
409 | ||
410 | if (result.leaks) { | |
411 | printf("\n%d leaked clusters were found on the image.\n" | |
412 | "This means waste of disk space, but no harm to data.\n", | |
413 | result.leaks); | |
414 | } | |
415 | ||
416 | if (result.check_errors) { | |
417 | printf("\n%d internal errors have occurred during the check.\n", | |
418 | result.check_errors); | |
1585969c | 419 | } |
1585969c AL |
420 | } |
421 | ||
422 | bdrv_delete(bs); | |
e076f338 KW |
423 | |
424 | if (ret < 0 || result.check_errors) { | |
425 | printf("\nAn error has occurred during the check: %s\n" | |
426 | "The check is not complete and may have missed error.\n", | |
427 | strerror(-ret)); | |
c2abccec MK |
428 | return 1; |
429 | } | |
e076f338 KW |
430 | |
431 | if (result.corruptions) { | |
432 | return 2; | |
433 | } else if (result.leaks) { | |
434 | return 3; | |
435 | } else { | |
436 | return 0; | |
437 | } | |
1585969c AL |
438 | } |
439 | ||
ea2384d3 FB |
440 | static int img_commit(int argc, char **argv) |
441 | { | |
442 | int c, ret; | |
443 | const char *filename, *fmt; | |
ea2384d3 FB |
444 | BlockDriverState *bs; |
445 | ||
446 | fmt = NULL; | |
447 | for(;;) { | |
448 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 449 | if (c == -1) { |
ea2384d3 | 450 | break; |
b8fb60da | 451 | } |
ea2384d3 | 452 | switch(c) { |
ef87394c | 453 | case '?': |
ea2384d3 FB |
454 | case 'h': |
455 | help(); | |
456 | break; | |
457 | case 'f': | |
458 | fmt = optarg; | |
459 | break; | |
460 | } | |
461 | } | |
b8fb60da | 462 | if (optind >= argc) { |
ea2384d3 | 463 | help(); |
b8fb60da | 464 | } |
ea2384d3 FB |
465 | filename = argv[optind++]; |
466 | ||
adfe078e | 467 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
c2abccec MK |
468 | if (!bs) { |
469 | return 1; | |
470 | } | |
ea2384d3 FB |
471 | ret = bdrv_commit(bs); |
472 | switch(ret) { | |
473 | case 0: | |
474 | printf("Image committed.\n"); | |
475 | break; | |
476 | case -ENOENT: | |
15654a6d | 477 | error_report("No disk inserted"); |
ea2384d3 FB |
478 | break; |
479 | case -EACCES: | |
15654a6d | 480 | error_report("Image is read-only"); |
ea2384d3 FB |
481 | break; |
482 | case -ENOTSUP: | |
15654a6d | 483 | error_report("Image is already committed"); |
ea2384d3 FB |
484 | break; |
485 | default: | |
15654a6d | 486 | error_report("Error while committing image"); |
ea2384d3 FB |
487 | break; |
488 | } | |
489 | ||
490 | bdrv_delete(bs); | |
c2abccec MK |
491 | if (ret) { |
492 | return 1; | |
493 | } | |
ea2384d3 FB |
494 | return 0; |
495 | } | |
496 | ||
497 | static int is_not_zero(const uint8_t *sector, int len) | |
498 | { | |
499 | int i; | |
500 | len >>= 2; | |
501 | for(i = 0;i < len; i++) { | |
502 | if (((uint32_t *)sector)[i] != 0) | |
503 | return 1; | |
504 | } | |
505 | return 0; | |
506 | } | |
507 | ||
f58c7b35 TS |
508 | /* |
509 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
510 | * a non-NUL byte. | |
511 | * | |
512 | * 'pnum' is set to the number of sectors (including and immediately following | |
513 | * the first one) that are known to be in the same allocated/unallocated state. | |
514 | */ | |
ea2384d3 FB |
515 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
516 | { | |
517 | int v, i; | |
518 | ||
519 | if (n <= 0) { | |
520 | *pnum = 0; | |
521 | return 0; | |
522 | } | |
523 | v = is_not_zero(buf, 512); | |
524 | for(i = 1; i < n; i++) { | |
525 | buf += 512; | |
526 | if (v != is_not_zero(buf, 512)) | |
527 | break; | |
528 | } | |
529 | *pnum = i; | |
530 | return v; | |
531 | } | |
532 | ||
3e85c6fd KW |
533 | /* |
534 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
535 | * buffers matches, non-zero otherwise. | |
536 | * | |
537 | * pnum is set to the number of sectors (including and immediately following | |
538 | * the first one) that are known to have the same comparison result | |
539 | */ | |
540 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
541 | int *pnum) | |
542 | { | |
543 | int res, i; | |
544 | ||
545 | if (n <= 0) { | |
546 | *pnum = 0; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | res = !!memcmp(buf1, buf2, 512); | |
551 | for(i = 1; i < n; i++) { | |
552 | buf1 += 512; | |
553 | buf2 += 512; | |
554 | ||
555 | if (!!memcmp(buf1, buf2, 512) != res) { | |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | *pnum = i; | |
561 | return res; | |
562 | } | |
563 | ||
80ee15a6 | 564 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
ea2384d3 FB |
565 | |
566 | static int img_convert(int argc, char **argv) | |
567 | { | |
eec77d9e | 568 | int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
f58c7b35 | 569 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
b50cbabc | 570 | BlockDriver *drv, *proto_drv; |
c2abccec | 571 | BlockDriverState **bs = NULL, *out_bs = NULL; |
96b8f136 TS |
572 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
573 | uint64_t bs_sectors; | |
c2abccec | 574 | uint8_t * buf = NULL; |
ea2384d3 | 575 | const uint8_t *buf1; |
faea38e7 | 576 | BlockDriverInfo bdi; |
b50cbabc | 577 | QEMUOptionParameter *param = NULL, *create_options = NULL; |
a18953fb | 578 | QEMUOptionParameter *out_baseimg_param; |
efa84d43 | 579 | char *options = NULL; |
51ef6727 | 580 | const char *snapshot_name = NULL; |
ea2384d3 FB |
581 | |
582 | fmt = NULL; | |
583 | out_fmt = "raw"; | |
f58c7b35 | 584 | out_baseimg = NULL; |
eec77d9e | 585 | compress = 0; |
ea2384d3 | 586 | for(;;) { |
51ef6727 | 587 | c = getopt(argc, argv, "f:O:B:s:hce6o:"); |
b8fb60da | 588 | if (c == -1) { |
ea2384d3 | 589 | break; |
b8fb60da | 590 | } |
ea2384d3 | 591 | switch(c) { |
ef87394c | 592 | case '?': |
ea2384d3 FB |
593 | case 'h': |
594 | help(); | |
595 | break; | |
596 | case 'f': | |
597 | fmt = optarg; | |
598 | break; | |
599 | case 'O': | |
600 | out_fmt = optarg; | |
601 | break; | |
f58c7b35 TS |
602 | case 'B': |
603 | out_baseimg = optarg; | |
604 | break; | |
ea2384d3 | 605 | case 'c': |
eec77d9e | 606 | compress = 1; |
ea2384d3 FB |
607 | break; |
608 | case 'e': | |
15654a6d | 609 | error_report("qemu-img: option -e is deprecated, please use \'-o " |
eec77d9e JS |
610 | "encryption\' instead!"); |
611 | return 1; | |
ec36ba14 | 612 | case '6': |
15654a6d | 613 | error_report("qemu-img: option -6 is deprecated, please use \'-o " |
eec77d9e JS |
614 | "compat6\' instead!"); |
615 | return 1; | |
efa84d43 KW |
616 | case 'o': |
617 | options = optarg; | |
618 | break; | |
51ef6727 | 619 | case 's': |
620 | snapshot_name = optarg; | |
621 | break; | |
ea2384d3 FB |
622 | } |
623 | } | |
3b46e624 | 624 | |
926c2d23 | 625 | bs_n = argc - optind - 1; |
b8fb60da JS |
626 | if (bs_n < 1) { |
627 | help(); | |
628 | } | |
926c2d23 AZ |
629 | |
630 | out_filename = argv[argc - 1]; | |
f58c7b35 | 631 | |
4ac8aacd JS |
632 | if (options && !strcmp(options, "?")) { |
633 | ret = print_block_option_help(out_filename, out_fmt); | |
634 | goto out; | |
635 | } | |
636 | ||
c2abccec | 637 | if (bs_n > 1 && out_baseimg) { |
15654a6d JS |
638 | error_report("-B makes no sense when concatenating multiple input " |
639 | "images"); | |
31ca34b8 JS |
640 | ret = -1; |
641 | goto out; | |
c2abccec | 642 | } |
926c2d23 | 643 | |
5bdf61fd | 644 | bs = qemu_mallocz(bs_n * sizeof(BlockDriverState *)); |
926c2d23 AZ |
645 | |
646 | total_sectors = 0; | |
647 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
adfe078e | 648 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
c2abccec | 649 | if (!bs[bs_i]) { |
15654a6d | 650 | error_report("Could not open '%s'", argv[optind + bs_i]); |
c2abccec MK |
651 | ret = -1; |
652 | goto out; | |
653 | } | |
926c2d23 AZ |
654 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
655 | total_sectors += bs_sectors; | |
656 | } | |
ea2384d3 | 657 | |
51ef6727 | 658 | if (snapshot_name != NULL) { |
659 | if (bs_n > 1) { | |
15654a6d | 660 | error_report("No support for concatenating multiple snapshot\n"); |
51ef6727 | 661 | ret = -1; |
662 | goto out; | |
663 | } | |
664 | if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { | |
15654a6d | 665 | error_report("Failed to load snapshot\n"); |
51ef6727 | 666 | ret = -1; |
667 | goto out; | |
668 | } | |
669 | } | |
670 | ||
efa84d43 | 671 | /* Find driver and parse its options */ |
ea2384d3 | 672 | drv = bdrv_find_format(out_fmt); |
c2abccec | 673 | if (!drv) { |
15654a6d | 674 | error_report("Unknown file format '%s'", out_fmt); |
c2abccec MK |
675 | ret = -1; |
676 | goto out; | |
677 | } | |
efa84d43 | 678 | |
b50cbabc | 679 | proto_drv = bdrv_find_protocol(out_filename); |
c2abccec | 680 | if (!proto_drv) { |
15654a6d | 681 | error_report("Unknown protocol '%s'", out_filename); |
c2abccec MK |
682 | ret = -1; |
683 | goto out; | |
684 | } | |
b50cbabc MK |
685 | |
686 | create_options = append_option_parameters(create_options, | |
687 | drv->create_options); | |
688 | create_options = append_option_parameters(create_options, | |
689 | proto_drv->create_options); | |
db08adf5 | 690 | |
efa84d43 | 691 | if (options) { |
b50cbabc | 692 | param = parse_option_parameters(options, create_options, param); |
efa84d43 | 693 | if (param == NULL) { |
15654a6d | 694 | error_report("Invalid options for file format '%s'.", out_fmt); |
c2abccec MK |
695 | ret = -1; |
696 | goto out; | |
efa84d43 KW |
697 | } |
698 | } else { | |
b50cbabc | 699 | param = parse_option_parameters("", create_options, param); |
efa84d43 KW |
700 | } |
701 | ||
702 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); | |
eec77d9e | 703 | ret = add_old_style_options(out_fmt, param, out_baseimg, NULL); |
c2abccec MK |
704 | if (ret < 0) { |
705 | goto out; | |
706 | } | |
efa84d43 | 707 | |
a18953fb KW |
708 | /* Get backing file name if -o backing_file was used */ |
709 | out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); | |
710 | if (out_baseimg_param) { | |
711 | out_baseimg = out_baseimg_param->value.s; | |
712 | } | |
713 | ||
efa84d43 | 714 | /* Check if compression is supported */ |
eec77d9e | 715 | if (compress) { |
efa84d43 KW |
716 | QEMUOptionParameter *encryption = |
717 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); | |
718 | ||
719 | if (!drv->bdrv_write_compressed) { | |
15654a6d | 720 | error_report("Compression not supported for this file format"); |
c2abccec MK |
721 | ret = -1; |
722 | goto out; | |
efa84d43 KW |
723 | } |
724 | ||
725 | if (encryption && encryption->value.n) { | |
15654a6d JS |
726 | error_report("Compression and encryption not supported at " |
727 | "the same time"); | |
c2abccec MK |
728 | ret = -1; |
729 | goto out; | |
efa84d43 KW |
730 | } |
731 | } | |
732 | ||
733 | /* Create the new image */ | |
734 | ret = bdrv_create(drv, out_filename, param); | |
ea2384d3 FB |
735 | if (ret < 0) { |
736 | if (ret == -ENOTSUP) { | |
15654a6d JS |
737 | error_report("Formatting not supported for file format '%s'", |
738 | out_fmt); | |
6e9ea0c0 | 739 | } else if (ret == -EFBIG) { |
15654a6d JS |
740 | error_report("The image size is too large for file format '%s'", |
741 | out_fmt); | |
ea2384d3 | 742 | } else { |
15654a6d JS |
743 | error_report("%s: error while converting %s: %s", |
744 | out_filename, out_fmt, strerror(-ret)); | |
ea2384d3 | 745 | } |
c2abccec | 746 | goto out; |
ea2384d3 | 747 | } |
3b46e624 | 748 | |
1bd8e175 KW |
749 | out_bs = bdrv_new_open(out_filename, out_fmt, |
750 | BDRV_O_FLAGS | BDRV_O_RDWR | BDRV_O_NO_FLUSH); | |
c2abccec MK |
751 | if (!out_bs) { |
752 | ret = -1; | |
753 | goto out; | |
754 | } | |
ea2384d3 | 755 | |
926c2d23 AZ |
756 | bs_i = 0; |
757 | bs_offset = 0; | |
758 | bdrv_get_geometry(bs[0], &bs_sectors); | |
d6771bfa | 759 | buf = qemu_malloc(IO_BUF_SIZE); |
926c2d23 | 760 | |
eec77d9e | 761 | if (compress) { |
c2abccec MK |
762 | ret = bdrv_get_info(out_bs, &bdi); |
763 | if (ret < 0) { | |
15654a6d | 764 | error_report("could not get block driver info"); |
c2abccec MK |
765 | goto out; |
766 | } | |
faea38e7 | 767 | cluster_size = bdi.cluster_size; |
c2abccec | 768 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
15654a6d | 769 | error_report("invalid cluster size"); |
c2abccec MK |
770 | ret = -1; |
771 | goto out; | |
772 | } | |
ea2384d3 FB |
773 | cluster_sectors = cluster_size >> 9; |
774 | sector_num = 0; | |
775 | for(;;) { | |
926c2d23 AZ |
776 | int64_t bs_num; |
777 | int remainder; | |
778 | uint8_t *buf2; | |
779 | ||
ea2384d3 FB |
780 | nb_sectors = total_sectors - sector_num; |
781 | if (nb_sectors <= 0) | |
782 | break; | |
783 | if (nb_sectors >= cluster_sectors) | |
784 | n = cluster_sectors; | |
785 | else | |
786 | n = nb_sectors; | |
926c2d23 AZ |
787 | |
788 | bs_num = sector_num - bs_offset; | |
789 | assert (bs_num >= 0); | |
790 | remainder = n; | |
791 | buf2 = buf; | |
792 | while (remainder > 0) { | |
793 | int nlow; | |
794 | while (bs_num == bs_sectors) { | |
795 | bs_i++; | |
796 | assert (bs_i < bs_n); | |
797 | bs_offset += bs_sectors; | |
798 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
799 | bs_num = 0; | |
0bfcd599 BS |
800 | /* printf("changing part: sector_num=%" PRId64 ", " |
801 | "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 | |
802 | "\n", sector_num, bs_i, bs_offset, bs_sectors); */ | |
926c2d23 AZ |
803 | } |
804 | assert (bs_num < bs_sectors); | |
805 | ||
806 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; | |
807 | ||
c2abccec MK |
808 | ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
809 | if (ret < 0) { | |
15654a6d | 810 | error_report("error while reading"); |
c2abccec MK |
811 | goto out; |
812 | } | |
926c2d23 AZ |
813 | |
814 | buf2 += nlow * 512; | |
815 | bs_num += nlow; | |
816 | ||
817 | remainder -= nlow; | |
818 | } | |
819 | assert (remainder == 0); | |
820 | ||
b8fb60da | 821 | if (n < cluster_sectors) { |
ea2384d3 | 822 | memset(buf + n * 512, 0, cluster_size - n * 512); |
b8fb60da | 823 | } |
ea2384d3 | 824 | if (is_not_zero(buf, cluster_size)) { |
c2abccec MK |
825 | ret = bdrv_write_compressed(out_bs, sector_num, buf, |
826 | cluster_sectors); | |
827 | if (ret != 0) { | |
15654a6d | 828 | error_report("error while compressing sector %" PRId64, |
ec3757de | 829 | sector_num); |
c2abccec MK |
830 | goto out; |
831 | } | |
ea2384d3 FB |
832 | } |
833 | sector_num += n; | |
834 | } | |
faea38e7 FB |
835 | /* signal EOF to align */ |
836 | bdrv_write_compressed(out_bs, 0, NULL, 0); | |
ea2384d3 | 837 | } else { |
f2feebbd KW |
838 | int has_zero_init = bdrv_has_zero_init(out_bs); |
839 | ||
f58c7b35 | 840 | sector_num = 0; // total number of sectors converted so far |
ea2384d3 FB |
841 | for(;;) { |
842 | nb_sectors = total_sectors - sector_num; | |
b8fb60da | 843 | if (nb_sectors <= 0) { |
ea2384d3 | 844 | break; |
b8fb60da JS |
845 | } |
846 | if (nb_sectors >= (IO_BUF_SIZE / 512)) { | |
ea2384d3 | 847 | n = (IO_BUF_SIZE / 512); |
b8fb60da | 848 | } else { |
ea2384d3 | 849 | n = nb_sectors; |
b8fb60da | 850 | } |
926c2d23 AZ |
851 | |
852 | while (sector_num - bs_offset >= bs_sectors) { | |
853 | bs_i ++; | |
854 | assert (bs_i < bs_n); | |
855 | bs_offset += bs_sectors; | |
856 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
0bfcd599 BS |
857 | /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " |
858 | "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", | |
926c2d23 AZ |
859 | sector_num, bs_i, bs_offset, bs_sectors); */ |
860 | } | |
861 | ||
b8fb60da | 862 | if (n > bs_offset + bs_sectors - sector_num) { |
926c2d23 | 863 | n = bs_offset + bs_sectors - sector_num; |
b8fb60da | 864 | } |
926c2d23 | 865 | |
f2feebbd | 866 | if (has_zero_init) { |
d032044f AS |
867 | /* If the output image is being created as a copy on write image, |
868 | assume that sectors which are unallocated in the input image | |
869 | are present in both the output's and input's base images (no | |
870 | need to copy them). */ | |
871 | if (out_baseimg) { | |
872 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, | |
873 | n, &n1)) { | |
874 | sector_num += n1; | |
875 | continue; | |
876 | } | |
877 | /* The next 'n1' sectors are allocated in the input image. Copy | |
878 | only those as they may be followed by unallocated sectors. */ | |
879 | n = n1; | |
93c65b47 | 880 | } |
93c65b47 AL |
881 | } else { |
882 | n1 = n; | |
f58c7b35 TS |
883 | } |
884 | ||
c2abccec MK |
885 | ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
886 | if (ret < 0) { | |
15654a6d | 887 | error_report("error while reading"); |
c2abccec MK |
888 | goto out; |
889 | } | |
ea2384d3 FB |
890 | /* NOTE: at the same time we convert, we do not write zero |
891 | sectors to have a chance to compress the image. Ideally, we | |
892 | should add a specific call to have the info to go faster */ | |
893 | buf1 = buf; | |
894 | while (n > 0) { | |
f58c7b35 TS |
895 | /* If the output image is being created as a copy on write image, |
896 | copy all sectors even the ones containing only NUL bytes, | |
93c65b47 AL |
897 | because they may differ from the sectors in the base image. |
898 | ||
899 | If the output is to a host device, we also write out | |
900 | sectors that are entirely 0, since whatever data was | |
901 | already there is garbage, not 0s. */ | |
f2feebbd | 902 | if (!has_zero_init || out_baseimg || |
93c65b47 | 903 | is_allocated_sectors(buf1, n, &n1)) { |
c2abccec MK |
904 | ret = bdrv_write(out_bs, sector_num, buf1, n1); |
905 | if (ret < 0) { | |
15654a6d | 906 | error_report("error while writing"); |
c2abccec MK |
907 | goto out; |
908 | } | |
ea2384d3 FB |
909 | } |
910 | sector_num += n1; | |
911 | n -= n1; | |
912 | buf1 += n1 * 512; | |
913 | } | |
914 | } | |
915 | } | |
c2abccec MK |
916 | out: |
917 | free_option_parameters(create_options); | |
918 | free_option_parameters(param); | |
d6771bfa | 919 | qemu_free(buf); |
c2abccec MK |
920 | if (out_bs) { |
921 | bdrv_delete(out_bs); | |
922 | } | |
31ca34b8 JS |
923 | if (bs) { |
924 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
925 | if (bs[bs_i]) { | |
926 | bdrv_delete(bs[bs_i]); | |
927 | } | |
c2abccec | 928 | } |
31ca34b8 | 929 | qemu_free(bs); |
c2abccec | 930 | } |
c2abccec MK |
931 | if (ret) { |
932 | return 1; | |
933 | } | |
ea2384d3 FB |
934 | return 0; |
935 | } | |
936 | ||
57d1a2b6 FB |
937 | #ifdef _WIN32 |
938 | static int64_t get_allocated_file_size(const char *filename) | |
939 | { | |
e8445331 FB |
940 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
941 | get_compressed_t get_compressed; | |
57d1a2b6 | 942 | struct _stati64 st; |
e8445331 FB |
943 | |
944 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
945 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); | |
946 | if (get_compressed) { | |
947 | DWORD high, low; | |
948 | low = get_compressed(filename, &high); | |
949 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) | |
950 | return (((int64_t) high) << 32) + low; | |
951 | } | |
952 | ||
5fafdf24 | 953 | if (_stati64(filename, &st) < 0) |
57d1a2b6 FB |
954 | return -1; |
955 | return st.st_size; | |
956 | } | |
957 | #else | |
958 | static int64_t get_allocated_file_size(const char *filename) | |
959 | { | |
960 | struct stat st; | |
5fafdf24 | 961 | if (stat(filename, &st) < 0) |
57d1a2b6 FB |
962 | return -1; |
963 | return (int64_t)st.st_blocks * 512; | |
964 | } | |
965 | #endif | |
966 | ||
faea38e7 FB |
967 | static void dump_snapshots(BlockDriverState *bs) |
968 | { | |
969 | QEMUSnapshotInfo *sn_tab, *sn; | |
970 | int nb_sns, i; | |
971 | char buf[256]; | |
972 | ||
973 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
974 | if (nb_sns <= 0) | |
975 | return; | |
976 | printf("Snapshot list:\n"); | |
977 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
978 | for(i = 0; i < nb_sns; i++) { | |
979 | sn = &sn_tab[i]; | |
980 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
981 | } | |
982 | qemu_free(sn_tab); | |
983 | } | |
984 | ||
ea2384d3 FB |
985 | static int img_info(int argc, char **argv) |
986 | { | |
987 | int c; | |
988 | const char *filename, *fmt; | |
ea2384d3 FB |
989 | BlockDriverState *bs; |
990 | char fmt_name[128], size_buf[128], dsize_buf[128]; | |
96b8f136 TS |
991 | uint64_t total_sectors; |
992 | int64_t allocated_size; | |
93b6b2a3 FB |
993 | char backing_filename[1024]; |
994 | char backing_filename2[1024]; | |
faea38e7 | 995 | BlockDriverInfo bdi; |
ea2384d3 FB |
996 | |
997 | fmt = NULL; | |
998 | for(;;) { | |
999 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 1000 | if (c == -1) { |
ea2384d3 | 1001 | break; |
b8fb60da | 1002 | } |
ea2384d3 | 1003 | switch(c) { |
ef87394c | 1004 | case '?': |
ea2384d3 FB |
1005 | case 'h': |
1006 | help(); | |
1007 | break; | |
1008 | case 'f': | |
1009 | fmt = optarg; | |
1010 | break; | |
1011 | } | |
1012 | } | |
b8fb60da | 1013 | if (optind >= argc) { |
ea2384d3 | 1014 | help(); |
b8fb60da | 1015 | } |
ea2384d3 FB |
1016 | filename = argv[optind++]; |
1017 | ||
adfe078e | 1018 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
c2abccec MK |
1019 | if (!bs) { |
1020 | return 1; | |
1021 | } | |
ea2384d3 FB |
1022 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
1023 | bdrv_get_geometry(bs, &total_sectors); | |
1024 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); | |
57d1a2b6 | 1025 | allocated_size = get_allocated_file_size(filename); |
b8fb60da | 1026 | if (allocated_size < 0) { |
a10ea30b | 1027 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
b8fb60da | 1028 | } else { |
5fafdf24 | 1029 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
de167e41 | 1030 | allocated_size); |
b8fb60da | 1031 | } |
ea2384d3 FB |
1032 | printf("image: %s\n" |
1033 | "file format: %s\n" | |
ec3757de | 1034 | "virtual size: %s (%" PRId64 " bytes)\n" |
ea2384d3 | 1035 | "disk size: %s\n", |
5fafdf24 | 1036 | filename, fmt_name, size_buf, |
ec3757de | 1037 | (total_sectors * 512), |
ea2384d3 | 1038 | dsize_buf); |
b8fb60da | 1039 | if (bdrv_is_encrypted(bs)) { |
ea2384d3 | 1040 | printf("encrypted: yes\n"); |
b8fb60da | 1041 | } |
faea38e7 | 1042 | if (bdrv_get_info(bs, &bdi) >= 0) { |
b8fb60da | 1043 | if (bdi.cluster_size != 0) { |
faea38e7 | 1044 | printf("cluster_size: %d\n", bdi.cluster_size); |
b8fb60da | 1045 | } |
faea38e7 | 1046 | } |
93b6b2a3 | 1047 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
faea38e7 | 1048 | if (backing_filename[0] != '\0') { |
93b6b2a3 FB |
1049 | path_combine(backing_filename2, sizeof(backing_filename2), |
1050 | filename, backing_filename); | |
5fafdf24 | 1051 | printf("backing file: %s (actual path: %s)\n", |
93b6b2a3 FB |
1052 | backing_filename, |
1053 | backing_filename2); | |
faea38e7 FB |
1054 | } |
1055 | dump_snapshots(bs); | |
ea2384d3 FB |
1056 | bdrv_delete(bs); |
1057 | return 0; | |
1058 | } | |
1059 | ||
f7b4a940 AL |
1060 | #define SNAPSHOT_LIST 1 |
1061 | #define SNAPSHOT_CREATE 2 | |
1062 | #define SNAPSHOT_APPLY 3 | |
1063 | #define SNAPSHOT_DELETE 4 | |
1064 | ||
153859be | 1065 | static int img_snapshot(int argc, char **argv) |
f7b4a940 AL |
1066 | { |
1067 | BlockDriverState *bs; | |
1068 | QEMUSnapshotInfo sn; | |
1069 | char *filename, *snapshot_name = NULL; | |
c2abccec | 1070 | int c, ret = 0, bdrv_oflags; |
f7b4a940 AL |
1071 | int action = 0; |
1072 | qemu_timeval tv; | |
1073 | ||
f5edb014 | 1074 | bdrv_oflags = BDRV_O_RDWR; |
f7b4a940 AL |
1075 | /* Parse commandline parameters */ |
1076 | for(;;) { | |
1077 | c = getopt(argc, argv, "la:c:d:h"); | |
b8fb60da | 1078 | if (c == -1) { |
f7b4a940 | 1079 | break; |
b8fb60da | 1080 | } |
f7b4a940 | 1081 | switch(c) { |
ef87394c | 1082 | case '?': |
f7b4a940 AL |
1083 | case 'h': |
1084 | help(); | |
153859be | 1085 | return 0; |
f7b4a940 AL |
1086 | case 'l': |
1087 | if (action) { | |
1088 | help(); | |
153859be | 1089 | return 0; |
f7b4a940 AL |
1090 | } |
1091 | action = SNAPSHOT_LIST; | |
f5edb014 | 1092 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
f7b4a940 AL |
1093 | break; |
1094 | case 'a': | |
1095 | if (action) { | |
1096 | help(); | |
153859be | 1097 | return 0; |
f7b4a940 AL |
1098 | } |
1099 | action = SNAPSHOT_APPLY; | |
1100 | snapshot_name = optarg; | |
1101 | break; | |
1102 | case 'c': | |
1103 | if (action) { | |
1104 | help(); | |
153859be | 1105 | return 0; |
f7b4a940 AL |
1106 | } |
1107 | action = SNAPSHOT_CREATE; | |
1108 | snapshot_name = optarg; | |
1109 | break; | |
1110 | case 'd': | |
1111 | if (action) { | |
1112 | help(); | |
153859be | 1113 | return 0; |
f7b4a940 AL |
1114 | } |
1115 | action = SNAPSHOT_DELETE; | |
1116 | snapshot_name = optarg; | |
1117 | break; | |
1118 | } | |
1119 | } | |
1120 | ||
b8fb60da | 1121 | if (optind >= argc) { |
f7b4a940 | 1122 | help(); |
b8fb60da | 1123 | } |
f7b4a940 AL |
1124 | filename = argv[optind++]; |
1125 | ||
1126 | /* Open the image */ | |
f163d073 | 1127 | bs = bdrv_new_open(filename, NULL, bdrv_oflags); |
c2abccec MK |
1128 | if (!bs) { |
1129 | return 1; | |
1130 | } | |
f7b4a940 AL |
1131 | |
1132 | /* Perform the requested action */ | |
1133 | switch(action) { | |
1134 | case SNAPSHOT_LIST: | |
1135 | dump_snapshots(bs); | |
1136 | break; | |
1137 | ||
1138 | case SNAPSHOT_CREATE: | |
1139 | memset(&sn, 0, sizeof(sn)); | |
1140 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
1141 | ||
1142 | qemu_gettimeofday(&tv); | |
1143 | sn.date_sec = tv.tv_sec; | |
1144 | sn.date_nsec = tv.tv_usec * 1000; | |
1145 | ||
1146 | ret = bdrv_snapshot_create(bs, &sn); | |
b8fb60da | 1147 | if (ret) { |
15654a6d | 1148 | error_report("Could not create snapshot '%s': %d (%s)", |
f7b4a940 | 1149 | snapshot_name, ret, strerror(-ret)); |
b8fb60da | 1150 | } |
f7b4a940 AL |
1151 | break; |
1152 | ||
1153 | case SNAPSHOT_APPLY: | |
1154 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
b8fb60da | 1155 | if (ret) { |
15654a6d | 1156 | error_report("Could not apply snapshot '%s': %d (%s)", |
f7b4a940 | 1157 | snapshot_name, ret, strerror(-ret)); |
b8fb60da | 1158 | } |
f7b4a940 AL |
1159 | break; |
1160 | ||
1161 | case SNAPSHOT_DELETE: | |
1162 | ret = bdrv_snapshot_delete(bs, snapshot_name); | |
b8fb60da | 1163 | if (ret) { |
15654a6d | 1164 | error_report("Could not delete snapshot '%s': %d (%s)", |
f7b4a940 | 1165 | snapshot_name, ret, strerror(-ret)); |
b8fb60da | 1166 | } |
f7b4a940 AL |
1167 | break; |
1168 | } | |
1169 | ||
1170 | /* Cleanup */ | |
1171 | bdrv_delete(bs); | |
c2abccec MK |
1172 | if (ret) { |
1173 | return 1; | |
1174 | } | |
153859be | 1175 | return 0; |
f7b4a940 AL |
1176 | } |
1177 | ||
3e85c6fd KW |
1178 | static int img_rebase(int argc, char **argv) |
1179 | { | |
c2abccec | 1180 | BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
f163d073 | 1181 | BlockDriver *old_backing_drv, *new_backing_drv; |
3e85c6fd | 1182 | char *filename; |
e53dbee0 | 1183 | const char *fmt, *out_basefmt, *out_baseimg; |
3e85c6fd KW |
1184 | int c, flags, ret; |
1185 | int unsafe = 0; | |
1186 | ||
1187 | /* Parse commandline parameters */ | |
e53dbee0 | 1188 | fmt = NULL; |
3e85c6fd KW |
1189 | out_baseimg = NULL; |
1190 | out_basefmt = NULL; | |
1191 | ||
1192 | for(;;) { | |
e53dbee0 | 1193 | c = getopt(argc, argv, "uhf:F:b:"); |
b8fb60da | 1194 | if (c == -1) { |
3e85c6fd | 1195 | break; |
b8fb60da | 1196 | } |
3e85c6fd | 1197 | switch(c) { |
ef87394c | 1198 | case '?': |
3e85c6fd KW |
1199 | case 'h': |
1200 | help(); | |
1201 | return 0; | |
e53dbee0 KW |
1202 | case 'f': |
1203 | fmt = optarg; | |
1204 | break; | |
3e85c6fd KW |
1205 | case 'F': |
1206 | out_basefmt = optarg; | |
1207 | break; | |
1208 | case 'b': | |
1209 | out_baseimg = optarg; | |
1210 | break; | |
1211 | case 'u': | |
1212 | unsafe = 1; | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | ||
b8fb60da | 1217 | if ((optind >= argc) || !out_baseimg) { |
3e85c6fd | 1218 | help(); |
b8fb60da | 1219 | } |
3e85c6fd KW |
1220 | filename = argv[optind++]; |
1221 | ||
1222 | /* | |
1223 | * Open the images. | |
1224 | * | |
1225 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
1226 | * the reference to a renamed or moved backing file. | |
1227 | */ | |
adfe078e | 1228 | flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
f163d073 | 1229 | bs = bdrv_new_open(filename, fmt, flags); |
c2abccec MK |
1230 | if (!bs) { |
1231 | return 1; | |
1232 | } | |
3e85c6fd KW |
1233 | |
1234 | /* Find the right drivers for the backing files */ | |
1235 | old_backing_drv = NULL; | |
1236 | new_backing_drv = NULL; | |
1237 | ||
1238 | if (!unsafe && bs->backing_format[0] != '\0') { | |
1239 | old_backing_drv = bdrv_find_format(bs->backing_format); | |
1240 | if (old_backing_drv == NULL) { | |
15654a6d | 1241 | error_report("Invalid format name: '%s'", bs->backing_format); |
c2abccec MK |
1242 | ret = -1; |
1243 | goto out; | |
3e85c6fd KW |
1244 | } |
1245 | } | |
1246 | ||
1247 | if (out_basefmt != NULL) { | |
1248 | new_backing_drv = bdrv_find_format(out_basefmt); | |
1249 | if (new_backing_drv == NULL) { | |
15654a6d | 1250 | error_report("Invalid format name: '%s'", out_basefmt); |
c2abccec MK |
1251 | ret = -1; |
1252 | goto out; | |
3e85c6fd KW |
1253 | } |
1254 | } | |
1255 | ||
1256 | /* For safe rebasing we need to compare old and new backing file */ | |
1257 | if (unsafe) { | |
1258 | /* Make the compiler happy */ | |
1259 | bs_old_backing = NULL; | |
1260 | bs_new_backing = NULL; | |
1261 | } else { | |
1262 | char backing_name[1024]; | |
1263 | ||
1264 | bs_old_backing = bdrv_new("old_backing"); | |
1265 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
c2abccec MK |
1266 | ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1267 | old_backing_drv); | |
1268 | if (ret) { | |
15654a6d | 1269 | error_report("Could not open old backing file '%s'", backing_name); |
c2abccec | 1270 | goto out; |
3e85c6fd KW |
1271 | } |
1272 | ||
1273 | bs_new_backing = bdrv_new("new_backing"); | |
cdbae851 | 1274 | ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
c2abccec MK |
1275 | new_backing_drv); |
1276 | if (ret) { | |
15654a6d | 1277 | error_report("Could not open new backing file '%s'", out_baseimg); |
c2abccec | 1278 | goto out; |
3e85c6fd KW |
1279 | } |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
1284 | * accesses go to the backing file. We must therefore compare this cluster | |
1285 | * in the old and new backing file, and if they differ we need to copy it | |
1286 | * from the old backing file into the COW file. | |
1287 | * | |
1288 | * If qemu-img crashes during this step, no harm is done. The content of | |
1289 | * the image is the same as the original one at any time. | |
1290 | */ | |
1291 | if (!unsafe) { | |
1292 | uint64_t num_sectors; | |
1293 | uint64_t sector; | |
cc60e327 | 1294 | int n; |
d6771bfa T |
1295 | uint8_t * buf_old; |
1296 | uint8_t * buf_new; | |
1297 | ||
1298 | buf_old = qemu_malloc(IO_BUF_SIZE); | |
1299 | buf_new = qemu_malloc(IO_BUF_SIZE); | |
3e85c6fd KW |
1300 | |
1301 | bdrv_get_geometry(bs, &num_sectors); | |
1302 | ||
1303 | for (sector = 0; sector < num_sectors; sector += n) { | |
1304 | ||
1305 | /* How many sectors can we handle with the next read? */ | |
1306 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
1307 | n = (IO_BUF_SIZE / 512); | |
1308 | } else { | |
1309 | n = num_sectors - sector; | |
1310 | } | |
1311 | ||
1312 | /* If the cluster is allocated, we don't need to take action */ | |
cc60e327 KW |
1313 | ret = bdrv_is_allocated(bs, sector, n, &n); |
1314 | if (ret) { | |
3e85c6fd KW |
1315 | continue; |
1316 | } | |
1317 | ||
1318 | /* Read old and new backing file */ | |
c2abccec MK |
1319 | ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1320 | if (ret < 0) { | |
15654a6d | 1321 | error_report("error while reading from old backing file"); |
c2abccec | 1322 | goto out; |
3e85c6fd | 1323 | } |
c2abccec MK |
1324 | ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1325 | if (ret < 0) { | |
15654a6d | 1326 | error_report("error while reading from new backing file"); |
c2abccec | 1327 | goto out; |
3e85c6fd KW |
1328 | } |
1329 | ||
1330 | /* If they differ, we need to write to the COW file */ | |
1331 | uint64_t written = 0; | |
1332 | ||
1333 | while (written < n) { | |
1334 | int pnum; | |
1335 | ||
1336 | if (compare_sectors(buf_old + written * 512, | |
60b1bd4f | 1337 | buf_new + written * 512, n - written, &pnum)) |
3e85c6fd KW |
1338 | { |
1339 | ret = bdrv_write(bs, sector + written, | |
1340 | buf_old + written * 512, pnum); | |
1341 | if (ret < 0) { | |
15654a6d | 1342 | error_report("Error while writing to COW image: %s", |
3e85c6fd | 1343 | strerror(-ret)); |
c2abccec | 1344 | goto out; |
3e85c6fd KW |
1345 | } |
1346 | } | |
1347 | ||
1348 | written += pnum; | |
1349 | } | |
1350 | } | |
d6771bfa T |
1351 | |
1352 | qemu_free(buf_old); | |
1353 | qemu_free(buf_new); | |
3e85c6fd KW |
1354 | } |
1355 | ||
1356 | /* | |
1357 | * Change the backing file. All clusters that are different from the old | |
1358 | * backing file are overwritten in the COW file now, so the visible content | |
1359 | * doesn't change when we switch the backing file. | |
1360 | */ | |
1361 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
1362 | if (ret == -ENOSPC) { | |
15654a6d JS |
1363 | error_report("Could not change the backing file to '%s': No " |
1364 | "space left in the file header", out_baseimg); | |
3e85c6fd | 1365 | } else if (ret < 0) { |
15654a6d | 1366 | error_report("Could not change the backing file to '%s': %s", |
3e85c6fd KW |
1367 | out_baseimg, strerror(-ret)); |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * TODO At this point it is possible to check if any clusters that are | |
1372 | * allocated in the COW file are the same in the backing file. If so, they | |
1373 | * could be dropped from the COW file. Don't do this before switching the | |
1374 | * backing file, in case of a crash this would lead to corruption. | |
1375 | */ | |
c2abccec | 1376 | out: |
3e85c6fd KW |
1377 | /* Cleanup */ |
1378 | if (!unsafe) { | |
1379 | bdrv_delete(bs_old_backing); | |
1380 | bdrv_delete(bs_new_backing); | |
1381 | } | |
1382 | ||
1383 | bdrv_delete(bs); | |
c2abccec MK |
1384 | if (ret) { |
1385 | return 1; | |
1386 | } | |
3e85c6fd KW |
1387 | return 0; |
1388 | } | |
1389 | ||
ae6b0ed6 SH |
1390 | static int img_resize(int argc, char **argv) |
1391 | { | |
1392 | int c, ret, relative; | |
1393 | const char *filename, *fmt, *size; | |
1394 | int64_t n, total_size; | |
2a81998a | 1395 | BlockDriverState *bs = NULL; |
ae6b0ed6 SH |
1396 | QEMUOptionParameter *param; |
1397 | QEMUOptionParameter resize_options[] = { | |
1398 | { | |
1399 | .name = BLOCK_OPT_SIZE, | |
1400 | .type = OPT_SIZE, | |
1401 | .help = "Virtual disk size" | |
1402 | }, | |
1403 | { NULL } | |
1404 | }; | |
1405 | ||
1406 | fmt = NULL; | |
1407 | for(;;) { | |
1408 | c = getopt(argc, argv, "f:h"); | |
1409 | if (c == -1) { | |
1410 | break; | |
1411 | } | |
1412 | switch(c) { | |
ef87394c | 1413 | case '?': |
ae6b0ed6 SH |
1414 | case 'h': |
1415 | help(); | |
1416 | break; | |
1417 | case 'f': | |
1418 | fmt = optarg; | |
1419 | break; | |
1420 | } | |
1421 | } | |
1422 | if (optind + 1 >= argc) { | |
1423 | help(); | |
1424 | } | |
1425 | filename = argv[optind++]; | |
1426 | size = argv[optind++]; | |
1427 | ||
1428 | /* Choose grow, shrink, or absolute resize mode */ | |
1429 | switch (size[0]) { | |
1430 | case '+': | |
1431 | relative = 1; | |
1432 | size++; | |
1433 | break; | |
1434 | case '-': | |
1435 | relative = -1; | |
1436 | size++; | |
1437 | break; | |
1438 | default: | |
1439 | relative = 0; | |
1440 | break; | |
1441 | } | |
1442 | ||
1443 | /* Parse size */ | |
1444 | param = parse_option_parameters("", resize_options, NULL); | |
1445 | if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) { | |
1446 | /* Error message already printed when size parsing fails */ | |
2a81998a JS |
1447 | ret = -1; |
1448 | goto out; | |
ae6b0ed6 SH |
1449 | } |
1450 | n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; | |
1451 | free_option_parameters(param); | |
1452 | ||
1453 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); | |
c2abccec | 1454 | if (!bs) { |
2a81998a JS |
1455 | ret = -1; |
1456 | goto out; | |
c2abccec | 1457 | } |
ae6b0ed6 SH |
1458 | |
1459 | if (relative) { | |
1460 | total_size = bdrv_getlength(bs) + n * relative; | |
1461 | } else { | |
1462 | total_size = n; | |
1463 | } | |
1464 | if (total_size <= 0) { | |
15654a6d | 1465 | error_report("New image size must be positive"); |
c2abccec MK |
1466 | ret = -1; |
1467 | goto out; | |
ae6b0ed6 SH |
1468 | } |
1469 | ||
1470 | ret = bdrv_truncate(bs, total_size); | |
1471 | switch (ret) { | |
1472 | case 0: | |
1473 | printf("Image resized.\n"); | |
1474 | break; | |
1475 | case -ENOTSUP: | |
15654a6d | 1476 | error_report("This image format does not support resize"); |
ae6b0ed6 SH |
1477 | break; |
1478 | case -EACCES: | |
15654a6d | 1479 | error_report("Image is read-only"); |
ae6b0ed6 SH |
1480 | break; |
1481 | default: | |
15654a6d | 1482 | error_report("Error resizing image (%d)", -ret); |
ae6b0ed6 SH |
1483 | break; |
1484 | } | |
c2abccec | 1485 | out: |
2a81998a JS |
1486 | if (bs) { |
1487 | bdrv_delete(bs); | |
1488 | } | |
c2abccec MK |
1489 | if (ret) { |
1490 | return 1; | |
1491 | } | |
ae6b0ed6 SH |
1492 | return 0; |
1493 | } | |
1494 | ||
c227f099 | 1495 | static const img_cmd_t img_cmds[] = { |
153859be SB |
1496 | #define DEF(option, callback, arg_string) \ |
1497 | { option, callback }, | |
1498 | #include "qemu-img-cmds.h" | |
1499 | #undef DEF | |
1500 | #undef GEN_DOCS | |
1501 | { NULL, NULL, }, | |
1502 | }; | |
1503 | ||
ea2384d3 FB |
1504 | int main(int argc, char **argv) |
1505 | { | |
c227f099 | 1506 | const img_cmd_t *cmd; |
153859be | 1507 | const char *cmdname; |
ea2384d3 | 1508 | |
53f76e58 KW |
1509 | error_set_progname(argv[0]); |
1510 | ||
ea2384d3 FB |
1511 | bdrv_init(); |
1512 | if (argc < 2) | |
1513 | help(); | |
153859be | 1514 | cmdname = argv[1]; |
8f9b157e | 1515 | argc--; argv++; |
153859be SB |
1516 | |
1517 | /* find the command */ | |
1518 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { | |
1519 | if (!strcmp(cmdname, cmd->name)) { | |
1520 | return cmd->handler(argc, argv); | |
1521 | } | |
ea2384d3 | 1522 | } |
153859be SB |
1523 | |
1524 | /* not found */ | |
1525 | help(); | |
ea2384d3 FB |
1526 | return 0; |
1527 | } |