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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" |
f7b4a940 | 26 | #include "osdep.h" |
ec36ba14 | 27 | #include "block_int.h" |
9230eaf6 | 28 | #include <stdio.h> |
ea2384d3 | 29 | |
e8445331 FB |
30 | #ifdef _WIN32 |
31 | #include <windows.h> | |
32 | #endif | |
33 | ||
c227f099 | 34 | typedef struct img_cmd_t { |
153859be SB |
35 | const char *name; |
36 | int (*handler)(int argc, char **argv); | |
c227f099 | 37 | } img_cmd_t; |
153859be | 38 | |
137519ce | 39 | /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ |
adfe078e | 40 | #define BDRV_O_FLAGS BDRV_O_CACHE_WB |
137519ce | 41 | |
c2abccec | 42 | static void error(const char *fmt, ...) |
ea2384d3 FB |
43 | { |
44 | va_list ap; | |
45 | va_start(ap, fmt); | |
57d1a2b6 | 46 | fprintf(stderr, "qemu-img: "); |
ea2384d3 FB |
47 | vfprintf(stderr, fmt, ap); |
48 | fprintf(stderr, "\n"); | |
ea2384d3 FB |
49 | va_end(ap); |
50 | } | |
51 | ||
52 | static void format_print(void *opaque, const char *name) | |
53 | { | |
54 | printf(" %s", name); | |
55 | } | |
56 | ||
d2c639d6 | 57 | /* Please keep in synch with qemu-img.texi */ |
3f379ab1 | 58 | static void help(void) |
ea2384d3 | 59 | { |
e00291c0 PB |
60 | const char *help_msg = |
61 | "qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" | |
3f020d70 | 62 | "usage: qemu-img command [command options]\n" |
63 | "QEMU disk image utility\n" | |
64 | "\n" | |
65 | "Command syntax:\n" | |
153859be SB |
66 | #define DEF(option, callback, arg_string) \ |
67 | " " arg_string "\n" | |
68 | #include "qemu-img-cmds.h" | |
69 | #undef DEF | |
70 | #undef GEN_DOCS | |
3f020d70 | 71 | "\n" |
72 | "Command parameters:\n" | |
73 | " 'filename' is a disk image filename\n" | |
74 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
75 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
76 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n" | |
77 | " and T (terabyte, 1024G) are supported. 'b' is ignored.\n" | |
78 | " 'output_filename' is the destination disk image filename\n" | |
79 | " 'output_fmt' is the destination format\n" | |
80 | " 'options' is a comma separated list of format specific options in a\n" | |
81 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
82 | " used format\n" | |
83 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
84 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
85 | " match exactly. The image doesn't need a working backing file before\n" | |
86 | " rebasing in this case (useful for renaming the backing file)\n" | |
87 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
88 | "\n" | |
89 | "Parameters to snapshot subcommand:\n" | |
90 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
91 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
92 | " '-c' creates a snapshot\n" | |
93 | " '-d' deletes a snapshot\n" | |
e00291c0 PB |
94 | " '-l' lists all snapshots in the given image\n"; |
95 | ||
96 | printf("%s\nSupported formats:", help_msg); | |
ea2384d3 FB |
97 | bdrv_iterate_format(format_print, NULL); |
98 | printf("\n"); | |
99 | exit(1); | |
100 | } | |
101 | ||
ea2384d3 FB |
102 | #if defined(WIN32) |
103 | /* XXX: put correct support for win32 */ | |
104 | static int read_password(char *buf, int buf_size) | |
105 | { | |
106 | int c, i; | |
107 | printf("Password: "); | |
108 | fflush(stdout); | |
109 | i = 0; | |
110 | for(;;) { | |
111 | c = getchar(); | |
112 | if (c == '\n') | |
113 | break; | |
114 | if (i < (buf_size - 1)) | |
115 | buf[i++] = c; | |
116 | } | |
117 | buf[i] = '\0'; | |
118 | return 0; | |
119 | } | |
120 | ||
121 | #else | |
122 | ||
123 | #include <termios.h> | |
124 | ||
125 | static struct termios oldtty; | |
126 | ||
127 | static void term_exit(void) | |
128 | { | |
129 | tcsetattr (0, TCSANOW, &oldtty); | |
130 | } | |
131 | ||
132 | static void term_init(void) | |
133 | { | |
134 | struct termios tty; | |
135 | ||
136 | tcgetattr (0, &tty); | |
137 | oldtty = tty; | |
138 | ||
139 | tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP | |
140 | |INLCR|IGNCR|ICRNL|IXON); | |
141 | tty.c_oflag |= OPOST; | |
142 | tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); | |
143 | tty.c_cflag &= ~(CSIZE|PARENB); | |
144 | tty.c_cflag |= CS8; | |
145 | tty.c_cc[VMIN] = 1; | |
146 | tty.c_cc[VTIME] = 0; | |
3b46e624 | 147 | |
ea2384d3 FB |
148 | tcsetattr (0, TCSANOW, &tty); |
149 | ||
150 | atexit(term_exit); | |
151 | } | |
152 | ||
3f379ab1 | 153 | static int read_password(char *buf, int buf_size) |
ea2384d3 FB |
154 | { |
155 | uint8_t ch; | |
156 | int i, ret; | |
157 | ||
158 | printf("password: "); | |
159 | fflush(stdout); | |
160 | term_init(); | |
161 | i = 0; | |
162 | for(;;) { | |
163 | ret = read(0, &ch, 1); | |
164 | if (ret == -1) { | |
165 | if (errno == EAGAIN || errno == EINTR) { | |
166 | continue; | |
167 | } else { | |
168 | ret = -1; | |
169 | break; | |
170 | } | |
171 | } else if (ret == 0) { | |
172 | ret = -1; | |
173 | break; | |
174 | } else { | |
175 | if (ch == '\r') { | |
176 | ret = 0; | |
177 | break; | |
178 | } | |
179 | if (i < (buf_size - 1)) | |
180 | buf[i++] = ch; | |
181 | } | |
182 | } | |
183 | term_exit(); | |
184 | buf[i] = '\0'; | |
185 | printf("\n"); | |
186 | return ret; | |
187 | } | |
188 | #endif | |
189 | ||
75c23805 | 190 | static BlockDriverState *bdrv_new_open(const char *filename, |
9bc378c1 | 191 | const char *fmt, |
f163d073 | 192 | int flags) |
75c23805 FB |
193 | { |
194 | BlockDriverState *bs; | |
195 | BlockDriver *drv; | |
196 | char password[256]; | |
197 | ||
198 | bs = bdrv_new(""); | |
c2abccec | 199 | if (!bs) { |
75c23805 | 200 | error("Not enough memory"); |
c2abccec MK |
201 | goto fail; |
202 | } | |
75c23805 FB |
203 | if (fmt) { |
204 | drv = bdrv_find_format(fmt); | |
c2abccec | 205 | if (!drv) { |
75c23805 | 206 | error("Unknown file format '%s'", fmt); |
c2abccec MK |
207 | goto fail; |
208 | } | |
75c23805 FB |
209 | } else { |
210 | drv = NULL; | |
211 | } | |
d6e9098e | 212 | if (bdrv_open(bs, filename, flags, drv) < 0) { |
75c23805 | 213 | error("Could not open '%s'", filename); |
c2abccec | 214 | goto fail; |
75c23805 FB |
215 | } |
216 | if (bdrv_is_encrypted(bs)) { | |
217 | printf("Disk image '%s' is encrypted.\n", filename); | |
c2abccec | 218 | if (read_password(password, sizeof(password)) < 0) { |
75c23805 | 219 | error("No password given"); |
c2abccec MK |
220 | goto fail; |
221 | } | |
222 | if (bdrv_set_key(bs, password) < 0) { | |
75c23805 | 223 | error("invalid password"); |
c2abccec MK |
224 | goto fail; |
225 | } | |
75c23805 FB |
226 | } |
227 | return bs; | |
c2abccec MK |
228 | fail: |
229 | if (bs) { | |
230 | bdrv_delete(bs); | |
231 | } | |
232 | return NULL; | |
75c23805 FB |
233 | } |
234 | ||
c2abccec | 235 | static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
efa84d43 KW |
236 | int flags, const char *base_filename, const char *base_fmt) |
237 | { | |
238 | if (flags & BLOCK_FLAG_ENCRYPT) { | |
239 | if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) { | |
240 | error("Encryption not supported for file format '%s'", fmt); | |
c2abccec | 241 | return -1; |
efa84d43 KW |
242 | } |
243 | } | |
244 | if (flags & BLOCK_FLAG_COMPAT6) { | |
245 | if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) { | |
246 | error("VMDK version 6 not supported for file format '%s'", fmt); | |
c2abccec | 247 | return -1; |
efa84d43 KW |
248 | } |
249 | } | |
250 | ||
251 | if (base_filename) { | |
252 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { | |
253 | error("Backing file not supported for file format '%s'", fmt); | |
c2abccec | 254 | return -1; |
efa84d43 KW |
255 | } |
256 | } | |
257 | if (base_fmt) { | |
258 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { | |
259 | error("Backing file format not supported for file format '%s'", fmt); | |
c2abccec | 260 | return -1; |
efa84d43 KW |
261 | } |
262 | } | |
c2abccec | 263 | return 0; |
efa84d43 KW |
264 | } |
265 | ||
ea2384d3 FB |
266 | static int img_create(int argc, char **argv) |
267 | { | |
c2abccec | 268 | int c, ret = 0, flags; |
ea2384d3 | 269 | const char *fmt = "raw"; |
9230eaf6 | 270 | const char *base_fmt = NULL; |
ea2384d3 FB |
271 | const char *filename; |
272 | const char *base_filename = NULL; | |
b50cbabc MK |
273 | BlockDriver *drv, *proto_drv; |
274 | QEMUOptionParameter *param = NULL, *create_options = NULL; | |
9ea2ea71 | 275 | char *options = NULL; |
3b46e624 | 276 | |
ec36ba14 | 277 | flags = 0; |
ea2384d3 | 278 | for(;;) { |
9ea2ea71 | 279 | c = getopt(argc, argv, "F:b:f:he6o:"); |
ea2384d3 FB |
280 | if (c == -1) |
281 | break; | |
282 | switch(c) { | |
283 | case 'h': | |
284 | help(); | |
285 | break; | |
9230eaf6 AL |
286 | case 'F': |
287 | base_fmt = optarg; | |
288 | break; | |
ea2384d3 FB |
289 | case 'b': |
290 | base_filename = optarg; | |
291 | break; | |
292 | case 'f': | |
293 | fmt = optarg; | |
294 | break; | |
295 | case 'e': | |
ec36ba14 | 296 | flags |= BLOCK_FLAG_ENCRYPT; |
ea2384d3 | 297 | break; |
d8871c5a | 298 | case '6': |
ec36ba14 | 299 | flags |= BLOCK_FLAG_COMPAT6; |
d8871c5a | 300 | break; |
9ea2ea71 KW |
301 | case 'o': |
302 | options = optarg; | |
303 | break; | |
ea2384d3 FB |
304 | } |
305 | } | |
9230eaf6 | 306 | |
b50cbabc MK |
307 | /* Get the filename */ |
308 | if (optind >= argc) | |
309 | help(); | |
310 | filename = argv[optind++]; | |
311 | ||
9ea2ea71 KW |
312 | /* Find driver and parse its options */ |
313 | drv = bdrv_find_format(fmt); | |
c2abccec | 314 | if (!drv) { |
9ea2ea71 | 315 | error("Unknown file format '%s'", fmt); |
c2abccec MK |
316 | return 1; |
317 | } | |
9230eaf6 | 318 | |
b50cbabc | 319 | proto_drv = bdrv_find_protocol(filename); |
c2abccec | 320 | if (!proto_drv) { |
b50cbabc | 321 | error("Unknown protocol '%s'", filename); |
c2abccec MK |
322 | return 1; |
323 | } | |
b50cbabc MK |
324 | |
325 | create_options = append_option_parameters(create_options, | |
326 | drv->create_options); | |
327 | create_options = append_option_parameters(create_options, | |
328 | proto_drv->create_options); | |
329 | ||
db08adf5 | 330 | if (options && !strcmp(options, "?")) { |
b50cbabc | 331 | print_option_help(create_options); |
c2abccec | 332 | goto out; |
db08adf5 KW |
333 | } |
334 | ||
9f56640c | 335 | /* Create parameter list with default values */ |
b50cbabc | 336 | param = parse_option_parameters("", create_options, param); |
9f56640c KW |
337 | set_option_parameter_int(param, BLOCK_OPT_SIZE, -1); |
338 | ||
339 | /* Parse -o options */ | |
9ea2ea71 | 340 | if (options) { |
b50cbabc | 341 | param = parse_option_parameters(options, create_options, param); |
9ea2ea71 KW |
342 | if (param == NULL) { |
343 | error("Invalid options for file format '%s'.", fmt); | |
c2abccec MK |
344 | ret = -1; |
345 | goto out; | |
9ea2ea71 | 346 | } |
9ea2ea71 KW |
347 | } |
348 | ||
349 | /* Add size to parameters */ | |
350 | if (optind < argc) { | |
351 | set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); | |
352 | } | |
353 | ||
354 | /* Add old-style options to parameters */ | |
c2abccec MK |
355 | ret = add_old_style_options(fmt, param, flags, base_filename, base_fmt); |
356 | if (ret < 0) { | |
357 | goto out; | |
358 | } | |
9ea2ea71 KW |
359 | |
360 | // The size for the image must always be specified, with one exception: | |
361 | // If we are using a backing file, we can obtain the size from there | |
9f56640c | 362 | if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { |
9ea2ea71 KW |
363 | |
364 | QEMUOptionParameter *backing_file = | |
365 | get_option_parameter(param, BLOCK_OPT_BACKING_FILE); | |
366 | QEMUOptionParameter *backing_fmt = | |
367 | get_option_parameter(param, BLOCK_OPT_BACKING_FMT); | |
368 | ||
369 | if (backing_file && backing_file->value.s) { | |
370 | BlockDriverState *bs; | |
371 | uint64_t size; | |
372 | const char *fmt = NULL; | |
373 | char buf[32]; | |
374 | ||
375 | if (backing_fmt && backing_fmt->value.s) { | |
376 | if (bdrv_find_format(backing_fmt->value.s)) { | |
377 | fmt = backing_fmt->value.s; | |
378 | } else { | |
379 | error("Unknown backing file format '%s'", | |
380 | backing_fmt->value.s); | |
c2abccec MK |
381 | ret = -1; |
382 | goto out; | |
9ea2ea71 KW |
383 | } |
384 | } | |
385 | ||
adfe078e | 386 | bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS); |
c2abccec MK |
387 | if (!bs) { |
388 | ret = -1; | |
389 | goto out; | |
390 | } | |
9ea2ea71 KW |
391 | bdrv_get_geometry(bs, &size); |
392 | size *= 512; | |
393 | bdrv_delete(bs); | |
394 | ||
395 | snprintf(buf, sizeof(buf), "%" PRId64, size); | |
396 | set_option_parameter(param, BLOCK_OPT_SIZE, buf); | |
397 | } else { | |
398 | error("Image creation needs a size parameter"); | |
c2abccec MK |
399 | ret = -1; |
400 | goto out; | |
9ea2ea71 | 401 | } |
75c23805 | 402 | } |
9ea2ea71 KW |
403 | |
404 | printf("Formatting '%s', fmt=%s ", filename, fmt); | |
405 | print_option_parameters(param); | |
406 | puts(""); | |
407 | ||
408 | ret = bdrv_create(drv, filename, param); | |
b50cbabc | 409 | free_option_parameters(create_options); |
9ea2ea71 KW |
410 | free_option_parameters(param); |
411 | ||
ea2384d3 FB |
412 | if (ret < 0) { |
413 | if (ret == -ENOTSUP) { | |
3c56521b | 414 | error("Formatting or formatting option not supported for file format '%s'", fmt); |
6e9ea0c0 AJ |
415 | } else if (ret == -EFBIG) { |
416 | error("The image size is too large for file format '%s'", fmt); | |
ea2384d3 | 417 | } else { |
3e7896de | 418 | error("%s: error while creating %s: %s", filename, fmt, strerror(-ret)); |
ea2384d3 FB |
419 | } |
420 | } | |
c2abccec MK |
421 | out: |
422 | if (ret) { | |
423 | return 1; | |
424 | } | |
ea2384d3 FB |
425 | return 0; |
426 | } | |
427 | ||
1585969c AL |
428 | static int img_check(int argc, char **argv) |
429 | { | |
430 | int c, ret; | |
431 | const char *filename, *fmt; | |
1585969c AL |
432 | BlockDriverState *bs; |
433 | ||
434 | fmt = NULL; | |
435 | for(;;) { | |
436 | c = getopt(argc, argv, "f:h"); | |
437 | if (c == -1) | |
438 | break; | |
439 | switch(c) { | |
440 | case 'h': | |
441 | help(); | |
442 | break; | |
443 | case 'f': | |
444 | fmt = optarg; | |
445 | break; | |
446 | } | |
447 | } | |
448 | if (optind >= argc) | |
449 | help(); | |
450 | filename = argv[optind++]; | |
451 | ||
adfe078e | 452 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
c2abccec MK |
453 | if (!bs) { |
454 | return 1; | |
455 | } | |
1585969c AL |
456 | ret = bdrv_check(bs); |
457 | switch(ret) { | |
458 | case 0: | |
459 | printf("No errors were found on the image.\n"); | |
460 | break; | |
461 | case -ENOTSUP: | |
462 | error("This image format does not support checks"); | |
463 | break; | |
464 | default: | |
465 | if (ret < 0) { | |
466 | error("An error occurred during the check"); | |
467 | } else { | |
468 | printf("%d errors were found on the image.\n", ret); | |
469 | } | |
470 | break; | |
471 | } | |
472 | ||
473 | bdrv_delete(bs); | |
c2abccec MK |
474 | if (ret) { |
475 | return 1; | |
476 | } | |
1585969c AL |
477 | return 0; |
478 | } | |
479 | ||
ea2384d3 FB |
480 | static int img_commit(int argc, char **argv) |
481 | { | |
482 | int c, ret; | |
483 | const char *filename, *fmt; | |
ea2384d3 FB |
484 | BlockDriverState *bs; |
485 | ||
486 | fmt = NULL; | |
487 | for(;;) { | |
488 | c = getopt(argc, argv, "f:h"); | |
489 | if (c == -1) | |
490 | break; | |
491 | switch(c) { | |
492 | case 'h': | |
493 | help(); | |
494 | break; | |
495 | case 'f': | |
496 | fmt = optarg; | |
497 | break; | |
498 | } | |
499 | } | |
5fafdf24 | 500 | if (optind >= argc) |
ea2384d3 FB |
501 | help(); |
502 | filename = argv[optind++]; | |
503 | ||
adfe078e | 504 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
c2abccec MK |
505 | if (!bs) { |
506 | return 1; | |
507 | } | |
ea2384d3 FB |
508 | ret = bdrv_commit(bs); |
509 | switch(ret) { | |
510 | case 0: | |
511 | printf("Image committed.\n"); | |
512 | break; | |
513 | case -ENOENT: | |
514 | error("No disk inserted"); | |
515 | break; | |
516 | case -EACCES: | |
517 | error("Image is read-only"); | |
518 | break; | |
519 | case -ENOTSUP: | |
520 | error("Image is already committed"); | |
521 | break; | |
522 | default: | |
523 | error("Error while committing image"); | |
524 | break; | |
525 | } | |
526 | ||
527 | bdrv_delete(bs); | |
c2abccec MK |
528 | if (ret) { |
529 | return 1; | |
530 | } | |
ea2384d3 FB |
531 | return 0; |
532 | } | |
533 | ||
534 | static int is_not_zero(const uint8_t *sector, int len) | |
535 | { | |
536 | int i; | |
537 | len >>= 2; | |
538 | for(i = 0;i < len; i++) { | |
539 | if (((uint32_t *)sector)[i] != 0) | |
540 | return 1; | |
541 | } | |
542 | return 0; | |
543 | } | |
544 | ||
f58c7b35 TS |
545 | /* |
546 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
547 | * a non-NUL byte. | |
548 | * | |
549 | * 'pnum' is set to the number of sectors (including and immediately following | |
550 | * the first one) that are known to be in the same allocated/unallocated state. | |
551 | */ | |
ea2384d3 FB |
552 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
553 | { | |
554 | int v, i; | |
555 | ||
556 | if (n <= 0) { | |
557 | *pnum = 0; | |
558 | return 0; | |
559 | } | |
560 | v = is_not_zero(buf, 512); | |
561 | for(i = 1; i < n; i++) { | |
562 | buf += 512; | |
563 | if (v != is_not_zero(buf, 512)) | |
564 | break; | |
565 | } | |
566 | *pnum = i; | |
567 | return v; | |
568 | } | |
569 | ||
3e85c6fd KW |
570 | /* |
571 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
572 | * buffers matches, non-zero otherwise. | |
573 | * | |
574 | * pnum is set to the number of sectors (including and immediately following | |
575 | * the first one) that are known to have the same comparison result | |
576 | */ | |
577 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
578 | int *pnum) | |
579 | { | |
580 | int res, i; | |
581 | ||
582 | if (n <= 0) { | |
583 | *pnum = 0; | |
584 | return 0; | |
585 | } | |
586 | ||
587 | res = !!memcmp(buf1, buf2, 512); | |
588 | for(i = 1; i < n; i++) { | |
589 | buf1 += 512; | |
590 | buf2 += 512; | |
591 | ||
592 | if (!!memcmp(buf1, buf2, 512) != res) { | |
593 | break; | |
594 | } | |
595 | } | |
596 | ||
597 | *pnum = i; | |
598 | return res; | |
599 | } | |
600 | ||
80ee15a6 | 601 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
ea2384d3 FB |
602 | |
603 | static int img_convert(int argc, char **argv) | |
604 | { | |
c2abccec | 605 | int c, ret = 0, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors; |
f58c7b35 | 606 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
b50cbabc | 607 | BlockDriver *drv, *proto_drv; |
c2abccec | 608 | BlockDriverState **bs = NULL, *out_bs = NULL; |
96b8f136 TS |
609 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
610 | uint64_t bs_sectors; | |
c2abccec | 611 | uint8_t * buf = NULL; |
ea2384d3 | 612 | const uint8_t *buf1; |
faea38e7 | 613 | BlockDriverInfo bdi; |
b50cbabc | 614 | QEMUOptionParameter *param = NULL, *create_options = NULL; |
efa84d43 | 615 | char *options = NULL; |
ea2384d3 FB |
616 | |
617 | fmt = NULL; | |
618 | out_fmt = "raw"; | |
f58c7b35 | 619 | out_baseimg = NULL; |
ec36ba14 | 620 | flags = 0; |
ea2384d3 | 621 | for(;;) { |
efa84d43 | 622 | c = getopt(argc, argv, "f:O:B:hce6o:"); |
ea2384d3 FB |
623 | if (c == -1) |
624 | break; | |
625 | switch(c) { | |
626 | case 'h': | |
627 | help(); | |
628 | break; | |
629 | case 'f': | |
630 | fmt = optarg; | |
631 | break; | |
632 | case 'O': | |
633 | out_fmt = optarg; | |
634 | break; | |
f58c7b35 TS |
635 | case 'B': |
636 | out_baseimg = optarg; | |
637 | break; | |
ea2384d3 | 638 | case 'c': |
ec36ba14 | 639 | flags |= BLOCK_FLAG_COMPRESS; |
ea2384d3 FB |
640 | break; |
641 | case 'e': | |
ec36ba14 TS |
642 | flags |= BLOCK_FLAG_ENCRYPT; |
643 | break; | |
644 | case '6': | |
645 | flags |= BLOCK_FLAG_COMPAT6; | |
ea2384d3 | 646 | break; |
efa84d43 KW |
647 | case 'o': |
648 | options = optarg; | |
649 | break; | |
ea2384d3 FB |
650 | } |
651 | } | |
3b46e624 | 652 | |
926c2d23 AZ |
653 | bs_n = argc - optind - 1; |
654 | if (bs_n < 1) help(); | |
655 | ||
656 | out_filename = argv[argc - 1]; | |
f58c7b35 | 657 | |
c2abccec | 658 | if (bs_n > 1 && out_baseimg) { |
f58c7b35 | 659 | error("-B makes no sense when concatenating multiple input images"); |
c2abccec MK |
660 | return 1; |
661 | } | |
926c2d23 AZ |
662 | |
663 | bs = calloc(bs_n, sizeof(BlockDriverState *)); | |
c2abccec | 664 | if (!bs) { |
926c2d23 | 665 | error("Out of memory"); |
c2abccec MK |
666 | return 1; |
667 | } | |
926c2d23 AZ |
668 | |
669 | total_sectors = 0; | |
670 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
adfe078e | 671 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
c2abccec | 672 | if (!bs[bs_i]) { |
926c2d23 | 673 | error("Could not open '%s'", argv[optind + bs_i]); |
c2abccec MK |
674 | ret = -1; |
675 | goto out; | |
676 | } | |
926c2d23 AZ |
677 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
678 | total_sectors += bs_sectors; | |
679 | } | |
ea2384d3 | 680 | |
efa84d43 | 681 | /* Find driver and parse its options */ |
ea2384d3 | 682 | drv = bdrv_find_format(out_fmt); |
c2abccec | 683 | if (!drv) { |
d34dda5e | 684 | error("Unknown file format '%s'", out_fmt); |
c2abccec MK |
685 | ret = -1; |
686 | goto out; | |
687 | } | |
efa84d43 | 688 | |
b50cbabc | 689 | proto_drv = bdrv_find_protocol(out_filename); |
c2abccec | 690 | if (!proto_drv) { |
b50cbabc | 691 | error("Unknown protocol '%s'", out_filename); |
c2abccec MK |
692 | ret = -1; |
693 | goto out; | |
694 | } | |
b50cbabc MK |
695 | |
696 | create_options = append_option_parameters(create_options, | |
697 | drv->create_options); | |
698 | create_options = append_option_parameters(create_options, | |
699 | proto_drv->create_options); | |
db08adf5 | 700 | if (options && !strcmp(options, "?")) { |
b50cbabc | 701 | print_option_help(create_options); |
c2abccec | 702 | goto out; |
db08adf5 KW |
703 | } |
704 | ||
efa84d43 | 705 | if (options) { |
b50cbabc | 706 | param = parse_option_parameters(options, create_options, param); |
efa84d43 KW |
707 | if (param == NULL) { |
708 | error("Invalid options for file format '%s'.", out_fmt); | |
c2abccec MK |
709 | ret = -1; |
710 | goto out; | |
efa84d43 KW |
711 | } |
712 | } else { | |
b50cbabc | 713 | param = parse_option_parameters("", create_options, param); |
efa84d43 KW |
714 | } |
715 | ||
716 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); | |
c2abccec MK |
717 | ret = add_old_style_options(out_fmt, param, flags, out_baseimg, NULL); |
718 | if (ret < 0) { | |
719 | goto out; | |
720 | } | |
efa84d43 KW |
721 | |
722 | /* Check if compression is supported */ | |
723 | if (flags & BLOCK_FLAG_COMPRESS) { | |
724 | QEMUOptionParameter *encryption = | |
725 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); | |
726 | ||
727 | if (!drv->bdrv_write_compressed) { | |
728 | error("Compression not supported for this file format"); | |
c2abccec MK |
729 | ret = -1; |
730 | goto out; | |
efa84d43 KW |
731 | } |
732 | ||
733 | if (encryption && encryption->value.n) { | |
734 | error("Compression and encryption not supported at the same time"); | |
c2abccec MK |
735 | ret = -1; |
736 | goto out; | |
efa84d43 KW |
737 | } |
738 | } | |
739 | ||
740 | /* Create the new image */ | |
741 | ret = bdrv_create(drv, out_filename, param); | |
ea2384d3 FB |
742 | if (ret < 0) { |
743 | if (ret == -ENOTSUP) { | |
93c65b47 | 744 | error("Formatting not supported for file format '%s'", out_fmt); |
6e9ea0c0 AJ |
745 | } else if (ret == -EFBIG) { |
746 | error("The image size is too large for file format '%s'", out_fmt); | |
ea2384d3 | 747 | } else { |
3e7896de | 748 | error("%s: error while converting %s: %s", out_filename, out_fmt, strerror(-ret)); |
ea2384d3 | 749 | } |
c2abccec | 750 | goto out; |
ea2384d3 | 751 | } |
3b46e624 | 752 | |
adfe078e | 753 | out_bs = bdrv_new_open(out_filename, out_fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
c2abccec MK |
754 | if (!out_bs) { |
755 | ret = -1; | |
756 | goto out; | |
757 | } | |
ea2384d3 | 758 | |
926c2d23 AZ |
759 | bs_i = 0; |
760 | bs_offset = 0; | |
761 | bdrv_get_geometry(bs[0], &bs_sectors); | |
d6771bfa | 762 | buf = qemu_malloc(IO_BUF_SIZE); |
926c2d23 AZ |
763 | |
764 | if (flags & BLOCK_FLAG_COMPRESS) { | |
c2abccec MK |
765 | ret = bdrv_get_info(out_bs, &bdi); |
766 | if (ret < 0) { | |
faea38e7 | 767 | error("could not get block driver info"); |
c2abccec MK |
768 | goto out; |
769 | } | |
faea38e7 | 770 | cluster_size = bdi.cluster_size; |
c2abccec | 771 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
ea2384d3 | 772 | error("invalid cluster size"); |
c2abccec MK |
773 | ret = -1; |
774 | goto out; | |
775 | } | |
ea2384d3 FB |
776 | cluster_sectors = cluster_size >> 9; |
777 | sector_num = 0; | |
778 | for(;;) { | |
926c2d23 AZ |
779 | int64_t bs_num; |
780 | int remainder; | |
781 | uint8_t *buf2; | |
782 | ||
ea2384d3 FB |
783 | nb_sectors = total_sectors - sector_num; |
784 | if (nb_sectors <= 0) | |
785 | break; | |
786 | if (nb_sectors >= cluster_sectors) | |
787 | n = cluster_sectors; | |
788 | else | |
789 | n = nb_sectors; | |
926c2d23 AZ |
790 | |
791 | bs_num = sector_num - bs_offset; | |
792 | assert (bs_num >= 0); | |
793 | remainder = n; | |
794 | buf2 = buf; | |
795 | while (remainder > 0) { | |
796 | int nlow; | |
797 | while (bs_num == bs_sectors) { | |
798 | bs_i++; | |
799 | assert (bs_i < bs_n); | |
800 | bs_offset += bs_sectors; | |
801 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
802 | bs_num = 0; | |
0bfcd599 BS |
803 | /* printf("changing part: sector_num=%" PRId64 ", " |
804 | "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 | |
805 | "\n", sector_num, bs_i, bs_offset, bs_sectors); */ | |
926c2d23 AZ |
806 | } |
807 | assert (bs_num < bs_sectors); | |
808 | ||
809 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; | |
810 | ||
c2abccec MK |
811 | ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
812 | if (ret < 0) { | |
926c2d23 | 813 | error("error while reading"); |
c2abccec MK |
814 | goto out; |
815 | } | |
926c2d23 AZ |
816 | |
817 | buf2 += nlow * 512; | |
818 | bs_num += nlow; | |
819 | ||
820 | remainder -= nlow; | |
821 | } | |
822 | assert (remainder == 0); | |
823 | ||
ea2384d3 FB |
824 | if (n < cluster_sectors) |
825 | memset(buf + n * 512, 0, cluster_size - n * 512); | |
826 | if (is_not_zero(buf, cluster_size)) { | |
c2abccec MK |
827 | ret = bdrv_write_compressed(out_bs, sector_num, buf, |
828 | cluster_sectors); | |
829 | if (ret != 0) { | |
ec3757de FB |
830 | error("error while compressing sector %" PRId64, |
831 | sector_num); | |
c2abccec MK |
832 | goto out; |
833 | } | |
ea2384d3 FB |
834 | } |
835 | sector_num += n; | |
836 | } | |
faea38e7 FB |
837 | /* signal EOF to align */ |
838 | bdrv_write_compressed(out_bs, 0, NULL, 0); | |
ea2384d3 | 839 | } else { |
f2feebbd KW |
840 | int has_zero_init = bdrv_has_zero_init(out_bs); |
841 | ||
f58c7b35 | 842 | sector_num = 0; // total number of sectors converted so far |
ea2384d3 FB |
843 | for(;;) { |
844 | nb_sectors = total_sectors - sector_num; | |
845 | if (nb_sectors <= 0) | |
846 | break; | |
847 | if (nb_sectors >= (IO_BUF_SIZE / 512)) | |
848 | n = (IO_BUF_SIZE / 512); | |
849 | else | |
850 | n = nb_sectors; | |
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 | ||
862 | if (n > bs_offset + bs_sectors - sector_num) | |
863 | n = bs_offset + bs_sectors - sector_num; | |
864 | ||
f2feebbd | 865 | if (has_zero_init) { |
d032044f AS |
866 | /* If the output image is being created as a copy on write image, |
867 | assume that sectors which are unallocated in the input image | |
868 | are present in both the output's and input's base images (no | |
869 | need to copy them). */ | |
870 | if (out_baseimg) { | |
871 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, | |
872 | n, &n1)) { | |
873 | sector_num += n1; | |
874 | continue; | |
875 | } | |
876 | /* The next 'n1' sectors are allocated in the input image. Copy | |
877 | only those as they may be followed by unallocated sectors. */ | |
878 | n = n1; | |
93c65b47 | 879 | } |
93c65b47 AL |
880 | } else { |
881 | n1 = n; | |
f58c7b35 TS |
882 | } |
883 | ||
c2abccec MK |
884 | ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
885 | if (ret < 0) { | |
ea2384d3 | 886 | error("error while reading"); |
c2abccec MK |
887 | goto out; |
888 | } | |
ea2384d3 FB |
889 | /* NOTE: at the same time we convert, we do not write zero |
890 | sectors to have a chance to compress the image. Ideally, we | |
891 | should add a specific call to have the info to go faster */ | |
892 | buf1 = buf; | |
893 | while (n > 0) { | |
f58c7b35 TS |
894 | /* If the output image is being created as a copy on write image, |
895 | copy all sectors even the ones containing only NUL bytes, | |
93c65b47 AL |
896 | because they may differ from the sectors in the base image. |
897 | ||
898 | If the output is to a host device, we also write out | |
899 | sectors that are entirely 0, since whatever data was | |
900 | already there is garbage, not 0s. */ | |
f2feebbd | 901 | if (!has_zero_init || out_baseimg || |
93c65b47 | 902 | is_allocated_sectors(buf1, n, &n1)) { |
c2abccec MK |
903 | ret = bdrv_write(out_bs, sector_num, buf1, n1); |
904 | if (ret < 0) { | |
ea2384d3 | 905 | error("error while writing"); |
c2abccec MK |
906 | goto out; |
907 | } | |
ea2384d3 FB |
908 | } |
909 | sector_num += n1; | |
910 | n -= n1; | |
911 | buf1 += n1 * 512; | |
912 | } | |
913 | } | |
914 | } | |
c2abccec MK |
915 | out: |
916 | free_option_parameters(create_options); | |
917 | free_option_parameters(param); | |
d6771bfa | 918 | qemu_free(buf); |
c2abccec MK |
919 | if (out_bs) { |
920 | bdrv_delete(out_bs); | |
921 | } | |
922 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
923 | if (bs[bs_i]) { | |
924 | bdrv_delete(bs[bs_i]); | |
925 | } | |
926 | } | |
926c2d23 | 927 | free(bs); |
c2abccec MK |
928 | if (ret) { |
929 | return 1; | |
930 | } | |
ea2384d3 FB |
931 | return 0; |
932 | } | |
933 | ||
57d1a2b6 FB |
934 | #ifdef _WIN32 |
935 | static int64_t get_allocated_file_size(const char *filename) | |
936 | { | |
e8445331 FB |
937 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
938 | get_compressed_t get_compressed; | |
57d1a2b6 | 939 | struct _stati64 st; |
e8445331 FB |
940 | |
941 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
942 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); | |
943 | if (get_compressed) { | |
944 | DWORD high, low; | |
945 | low = get_compressed(filename, &high); | |
946 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) | |
947 | return (((int64_t) high) << 32) + low; | |
948 | } | |
949 | ||
5fafdf24 | 950 | if (_stati64(filename, &st) < 0) |
57d1a2b6 FB |
951 | return -1; |
952 | return st.st_size; | |
953 | } | |
954 | #else | |
955 | static int64_t get_allocated_file_size(const char *filename) | |
956 | { | |
957 | struct stat st; | |
5fafdf24 | 958 | if (stat(filename, &st) < 0) |
57d1a2b6 FB |
959 | return -1; |
960 | return (int64_t)st.st_blocks * 512; | |
961 | } | |
962 | #endif | |
963 | ||
faea38e7 FB |
964 | static void dump_snapshots(BlockDriverState *bs) |
965 | { | |
966 | QEMUSnapshotInfo *sn_tab, *sn; | |
967 | int nb_sns, i; | |
968 | char buf[256]; | |
969 | ||
970 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
971 | if (nb_sns <= 0) | |
972 | return; | |
973 | printf("Snapshot list:\n"); | |
974 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
975 | for(i = 0; i < nb_sns; i++) { | |
976 | sn = &sn_tab[i]; | |
977 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
978 | } | |
979 | qemu_free(sn_tab); | |
980 | } | |
981 | ||
ea2384d3 FB |
982 | static int img_info(int argc, char **argv) |
983 | { | |
984 | int c; | |
985 | const char *filename, *fmt; | |
ea2384d3 FB |
986 | BlockDriverState *bs; |
987 | char fmt_name[128], size_buf[128], dsize_buf[128]; | |
96b8f136 TS |
988 | uint64_t total_sectors; |
989 | int64_t allocated_size; | |
93b6b2a3 FB |
990 | char backing_filename[1024]; |
991 | char backing_filename2[1024]; | |
faea38e7 | 992 | BlockDriverInfo bdi; |
ea2384d3 FB |
993 | |
994 | fmt = NULL; | |
995 | for(;;) { | |
996 | c = getopt(argc, argv, "f:h"); | |
997 | if (c == -1) | |
998 | break; | |
999 | switch(c) { | |
1000 | case 'h': | |
1001 | help(); | |
1002 | break; | |
1003 | case 'f': | |
1004 | fmt = optarg; | |
1005 | break; | |
1006 | } | |
1007 | } | |
5fafdf24 | 1008 | if (optind >= argc) |
ea2384d3 FB |
1009 | help(); |
1010 | filename = argv[optind++]; | |
1011 | ||
adfe078e | 1012 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
c2abccec MK |
1013 | if (!bs) { |
1014 | return 1; | |
1015 | } | |
ea2384d3 FB |
1016 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
1017 | bdrv_get_geometry(bs, &total_sectors); | |
1018 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); | |
57d1a2b6 FB |
1019 | allocated_size = get_allocated_file_size(filename); |
1020 | if (allocated_size < 0) | |
a10ea30b | 1021 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
de167e41 | 1022 | else |
5fafdf24 | 1023 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
de167e41 | 1024 | allocated_size); |
ea2384d3 FB |
1025 | printf("image: %s\n" |
1026 | "file format: %s\n" | |
ec3757de | 1027 | "virtual size: %s (%" PRId64 " bytes)\n" |
ea2384d3 | 1028 | "disk size: %s\n", |
5fafdf24 | 1029 | filename, fmt_name, size_buf, |
ec3757de | 1030 | (total_sectors * 512), |
ea2384d3 FB |
1031 | dsize_buf); |
1032 | if (bdrv_is_encrypted(bs)) | |
1033 | printf("encrypted: yes\n"); | |
faea38e7 | 1034 | if (bdrv_get_info(bs, &bdi) >= 0) { |
5fafdf24 | 1035 | if (bdi.cluster_size != 0) |
faea38e7 FB |
1036 | printf("cluster_size: %d\n", bdi.cluster_size); |
1037 | } | |
93b6b2a3 | 1038 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
faea38e7 | 1039 | if (backing_filename[0] != '\0') { |
93b6b2a3 FB |
1040 | path_combine(backing_filename2, sizeof(backing_filename2), |
1041 | filename, backing_filename); | |
5fafdf24 | 1042 | printf("backing file: %s (actual path: %s)\n", |
93b6b2a3 FB |
1043 | backing_filename, |
1044 | backing_filename2); | |
faea38e7 FB |
1045 | } |
1046 | dump_snapshots(bs); | |
ea2384d3 FB |
1047 | bdrv_delete(bs); |
1048 | return 0; | |
1049 | } | |
1050 | ||
f7b4a940 AL |
1051 | #define SNAPSHOT_LIST 1 |
1052 | #define SNAPSHOT_CREATE 2 | |
1053 | #define SNAPSHOT_APPLY 3 | |
1054 | #define SNAPSHOT_DELETE 4 | |
1055 | ||
153859be | 1056 | static int img_snapshot(int argc, char **argv) |
f7b4a940 AL |
1057 | { |
1058 | BlockDriverState *bs; | |
1059 | QEMUSnapshotInfo sn; | |
1060 | char *filename, *snapshot_name = NULL; | |
c2abccec | 1061 | int c, ret = 0, bdrv_oflags; |
f7b4a940 AL |
1062 | int action = 0; |
1063 | qemu_timeval tv; | |
1064 | ||
f5edb014 | 1065 | bdrv_oflags = BDRV_O_RDWR; |
f7b4a940 AL |
1066 | /* Parse commandline parameters */ |
1067 | for(;;) { | |
1068 | c = getopt(argc, argv, "la:c:d:h"); | |
1069 | if (c == -1) | |
1070 | break; | |
1071 | switch(c) { | |
1072 | case 'h': | |
1073 | help(); | |
153859be | 1074 | return 0; |
f7b4a940 AL |
1075 | case 'l': |
1076 | if (action) { | |
1077 | help(); | |
153859be | 1078 | return 0; |
f7b4a940 AL |
1079 | } |
1080 | action = SNAPSHOT_LIST; | |
f5edb014 | 1081 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
f7b4a940 AL |
1082 | break; |
1083 | case 'a': | |
1084 | if (action) { | |
1085 | help(); | |
153859be | 1086 | return 0; |
f7b4a940 AL |
1087 | } |
1088 | action = SNAPSHOT_APPLY; | |
1089 | snapshot_name = optarg; | |
1090 | break; | |
1091 | case 'c': | |
1092 | if (action) { | |
1093 | help(); | |
153859be | 1094 | return 0; |
f7b4a940 AL |
1095 | } |
1096 | action = SNAPSHOT_CREATE; | |
1097 | snapshot_name = optarg; | |
1098 | break; | |
1099 | case 'd': | |
1100 | if (action) { | |
1101 | help(); | |
153859be | 1102 | return 0; |
f7b4a940 AL |
1103 | } |
1104 | action = SNAPSHOT_DELETE; | |
1105 | snapshot_name = optarg; | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | if (optind >= argc) | |
1111 | help(); | |
1112 | filename = argv[optind++]; | |
1113 | ||
1114 | /* Open the image */ | |
f163d073 | 1115 | bs = bdrv_new_open(filename, NULL, bdrv_oflags); |
c2abccec MK |
1116 | if (!bs) { |
1117 | return 1; | |
1118 | } | |
f7b4a940 AL |
1119 | |
1120 | /* Perform the requested action */ | |
1121 | switch(action) { | |
1122 | case SNAPSHOT_LIST: | |
1123 | dump_snapshots(bs); | |
1124 | break; | |
1125 | ||
1126 | case SNAPSHOT_CREATE: | |
1127 | memset(&sn, 0, sizeof(sn)); | |
1128 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
1129 | ||
1130 | qemu_gettimeofday(&tv); | |
1131 | sn.date_sec = tv.tv_sec; | |
1132 | sn.date_nsec = tv.tv_usec * 1000; | |
1133 | ||
1134 | ret = bdrv_snapshot_create(bs, &sn); | |
1135 | if (ret) | |
1136 | error("Could not create snapshot '%s': %d (%s)", | |
1137 | snapshot_name, ret, strerror(-ret)); | |
1138 | break; | |
1139 | ||
1140 | case SNAPSHOT_APPLY: | |
1141 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
1142 | if (ret) | |
1143 | error("Could not apply snapshot '%s': %d (%s)", | |
1144 | snapshot_name, ret, strerror(-ret)); | |
1145 | break; | |
1146 | ||
1147 | case SNAPSHOT_DELETE: | |
1148 | ret = bdrv_snapshot_delete(bs, snapshot_name); | |
1149 | if (ret) | |
1150 | error("Could not delete snapshot '%s': %d (%s)", | |
1151 | snapshot_name, ret, strerror(-ret)); | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | /* Cleanup */ | |
1156 | bdrv_delete(bs); | |
c2abccec MK |
1157 | if (ret) { |
1158 | return 1; | |
1159 | } | |
153859be | 1160 | return 0; |
f7b4a940 AL |
1161 | } |
1162 | ||
3e85c6fd KW |
1163 | static int img_rebase(int argc, char **argv) |
1164 | { | |
c2abccec | 1165 | BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
f163d073 | 1166 | BlockDriver *old_backing_drv, *new_backing_drv; |
3e85c6fd | 1167 | char *filename; |
e53dbee0 | 1168 | const char *fmt, *out_basefmt, *out_baseimg; |
3e85c6fd KW |
1169 | int c, flags, ret; |
1170 | int unsafe = 0; | |
1171 | ||
1172 | /* Parse commandline parameters */ | |
e53dbee0 | 1173 | fmt = NULL; |
3e85c6fd KW |
1174 | out_baseimg = NULL; |
1175 | out_basefmt = NULL; | |
1176 | ||
1177 | for(;;) { | |
e53dbee0 | 1178 | c = getopt(argc, argv, "uhf:F:b:"); |
3e85c6fd KW |
1179 | if (c == -1) |
1180 | break; | |
1181 | switch(c) { | |
1182 | case 'h': | |
1183 | help(); | |
1184 | return 0; | |
e53dbee0 KW |
1185 | case 'f': |
1186 | fmt = optarg; | |
1187 | break; | |
3e85c6fd KW |
1188 | case 'F': |
1189 | out_basefmt = optarg; | |
1190 | break; | |
1191 | case 'b': | |
1192 | out_baseimg = optarg; | |
1193 | break; | |
1194 | case 'u': | |
1195 | unsafe = 1; | |
1196 | break; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | if ((optind >= argc) || !out_baseimg) | |
1201 | help(); | |
1202 | filename = argv[optind++]; | |
1203 | ||
1204 | /* | |
1205 | * Open the images. | |
1206 | * | |
1207 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
1208 | * the reference to a renamed or moved backing file. | |
1209 | */ | |
adfe078e | 1210 | flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
f163d073 | 1211 | bs = bdrv_new_open(filename, fmt, flags); |
c2abccec MK |
1212 | if (!bs) { |
1213 | return 1; | |
1214 | } | |
3e85c6fd KW |
1215 | |
1216 | /* Find the right drivers for the backing files */ | |
1217 | old_backing_drv = NULL; | |
1218 | new_backing_drv = NULL; | |
1219 | ||
1220 | if (!unsafe && bs->backing_format[0] != '\0') { | |
1221 | old_backing_drv = bdrv_find_format(bs->backing_format); | |
1222 | if (old_backing_drv == NULL) { | |
1223 | error("Invalid format name: '%s'", bs->backing_format); | |
c2abccec MK |
1224 | ret = -1; |
1225 | goto out; | |
3e85c6fd KW |
1226 | } |
1227 | } | |
1228 | ||
1229 | if (out_basefmt != NULL) { | |
1230 | new_backing_drv = bdrv_find_format(out_basefmt); | |
1231 | if (new_backing_drv == NULL) { | |
1232 | error("Invalid format name: '%s'", out_basefmt); | |
c2abccec MK |
1233 | ret = -1; |
1234 | goto out; | |
3e85c6fd KW |
1235 | } |
1236 | } | |
1237 | ||
1238 | /* For safe rebasing we need to compare old and new backing file */ | |
1239 | if (unsafe) { | |
1240 | /* Make the compiler happy */ | |
1241 | bs_old_backing = NULL; | |
1242 | bs_new_backing = NULL; | |
1243 | } else { | |
1244 | char backing_name[1024]; | |
1245 | ||
1246 | bs_old_backing = bdrv_new("old_backing"); | |
1247 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
c2abccec MK |
1248 | ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1249 | old_backing_drv); | |
1250 | if (ret) { | |
3e85c6fd | 1251 | error("Could not open old backing file '%s'", backing_name); |
c2abccec | 1252 | goto out; |
3e85c6fd KW |
1253 | } |
1254 | ||
1255 | bs_new_backing = bdrv_new("new_backing"); | |
c2abccec MK |
1256 | ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS | BDRV_O_RDWR, |
1257 | new_backing_drv); | |
1258 | if (ret) { | |
584771e6 | 1259 | error("Could not open new backing file '%s'", out_baseimg); |
c2abccec | 1260 | goto out; |
3e85c6fd KW |
1261 | } |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
1266 | * accesses go to the backing file. We must therefore compare this cluster | |
1267 | * in the old and new backing file, and if they differ we need to copy it | |
1268 | * from the old backing file into the COW file. | |
1269 | * | |
1270 | * If qemu-img crashes during this step, no harm is done. The content of | |
1271 | * the image is the same as the original one at any time. | |
1272 | */ | |
1273 | if (!unsafe) { | |
1274 | uint64_t num_sectors; | |
1275 | uint64_t sector; | |
cc60e327 | 1276 | int n; |
d6771bfa T |
1277 | uint8_t * buf_old; |
1278 | uint8_t * buf_new; | |
1279 | ||
1280 | buf_old = qemu_malloc(IO_BUF_SIZE); | |
1281 | buf_new = qemu_malloc(IO_BUF_SIZE); | |
3e85c6fd KW |
1282 | |
1283 | bdrv_get_geometry(bs, &num_sectors); | |
1284 | ||
1285 | for (sector = 0; sector < num_sectors; sector += n) { | |
1286 | ||
1287 | /* How many sectors can we handle with the next read? */ | |
1288 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
1289 | n = (IO_BUF_SIZE / 512); | |
1290 | } else { | |
1291 | n = num_sectors - sector; | |
1292 | } | |
1293 | ||
1294 | /* If the cluster is allocated, we don't need to take action */ | |
cc60e327 KW |
1295 | ret = bdrv_is_allocated(bs, sector, n, &n); |
1296 | if (ret) { | |
3e85c6fd KW |
1297 | continue; |
1298 | } | |
1299 | ||
1300 | /* Read old and new backing file */ | |
c2abccec MK |
1301 | ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1302 | if (ret < 0) { | |
3e85c6fd | 1303 | error("error while reading from old backing file"); |
c2abccec | 1304 | goto out; |
3e85c6fd | 1305 | } |
c2abccec MK |
1306 | ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1307 | if (ret < 0) { | |
3e85c6fd | 1308 | error("error while reading from new backing file"); |
c2abccec | 1309 | goto out; |
3e85c6fd KW |
1310 | } |
1311 | ||
1312 | /* If they differ, we need to write to the COW file */ | |
1313 | uint64_t written = 0; | |
1314 | ||
1315 | while (written < n) { | |
1316 | int pnum; | |
1317 | ||
1318 | if (compare_sectors(buf_old + written * 512, | |
60b1bd4f | 1319 | buf_new + written * 512, n - written, &pnum)) |
3e85c6fd KW |
1320 | { |
1321 | ret = bdrv_write(bs, sector + written, | |
1322 | buf_old + written * 512, pnum); | |
1323 | if (ret < 0) { | |
1324 | error("Error while writing to COW image: %s", | |
1325 | strerror(-ret)); | |
c2abccec | 1326 | goto out; |
3e85c6fd KW |
1327 | } |
1328 | } | |
1329 | ||
1330 | written += pnum; | |
1331 | } | |
1332 | } | |
d6771bfa T |
1333 | |
1334 | qemu_free(buf_old); | |
1335 | qemu_free(buf_new); | |
3e85c6fd KW |
1336 | } |
1337 | ||
1338 | /* | |
1339 | * Change the backing file. All clusters that are different from the old | |
1340 | * backing file are overwritten in the COW file now, so the visible content | |
1341 | * doesn't change when we switch the backing file. | |
1342 | */ | |
1343 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
1344 | if (ret == -ENOSPC) { | |
1345 | error("Could not change the backing file to '%s': No space left in " | |
1346 | "the file header", out_baseimg); | |
1347 | } else if (ret < 0) { | |
1348 | error("Could not change the backing file to '%s': %s", | |
1349 | out_baseimg, strerror(-ret)); | |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * TODO At this point it is possible to check if any clusters that are | |
1354 | * allocated in the COW file are the same in the backing file. If so, they | |
1355 | * could be dropped from the COW file. Don't do this before switching the | |
1356 | * backing file, in case of a crash this would lead to corruption. | |
1357 | */ | |
c2abccec | 1358 | out: |
3e85c6fd KW |
1359 | /* Cleanup */ |
1360 | if (!unsafe) { | |
1361 | bdrv_delete(bs_old_backing); | |
1362 | bdrv_delete(bs_new_backing); | |
1363 | } | |
1364 | ||
1365 | bdrv_delete(bs); | |
c2abccec MK |
1366 | if (ret) { |
1367 | return 1; | |
1368 | } | |
3e85c6fd KW |
1369 | return 0; |
1370 | } | |
1371 | ||
ae6b0ed6 SH |
1372 | static int img_resize(int argc, char **argv) |
1373 | { | |
1374 | int c, ret, relative; | |
1375 | const char *filename, *fmt, *size; | |
1376 | int64_t n, total_size; | |
1377 | BlockDriverState *bs; | |
1378 | QEMUOptionParameter *param; | |
1379 | QEMUOptionParameter resize_options[] = { | |
1380 | { | |
1381 | .name = BLOCK_OPT_SIZE, | |
1382 | .type = OPT_SIZE, | |
1383 | .help = "Virtual disk size" | |
1384 | }, | |
1385 | { NULL } | |
1386 | }; | |
1387 | ||
1388 | fmt = NULL; | |
1389 | for(;;) { | |
1390 | c = getopt(argc, argv, "f:h"); | |
1391 | if (c == -1) { | |
1392 | break; | |
1393 | } | |
1394 | switch(c) { | |
1395 | case 'h': | |
1396 | help(); | |
1397 | break; | |
1398 | case 'f': | |
1399 | fmt = optarg; | |
1400 | break; | |
1401 | } | |
1402 | } | |
1403 | if (optind + 1 >= argc) { | |
1404 | help(); | |
1405 | } | |
1406 | filename = argv[optind++]; | |
1407 | size = argv[optind++]; | |
1408 | ||
1409 | /* Choose grow, shrink, or absolute resize mode */ | |
1410 | switch (size[0]) { | |
1411 | case '+': | |
1412 | relative = 1; | |
1413 | size++; | |
1414 | break; | |
1415 | case '-': | |
1416 | relative = -1; | |
1417 | size++; | |
1418 | break; | |
1419 | default: | |
1420 | relative = 0; | |
1421 | break; | |
1422 | } | |
1423 | ||
1424 | /* Parse size */ | |
1425 | param = parse_option_parameters("", resize_options, NULL); | |
1426 | if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) { | |
1427 | /* Error message already printed when size parsing fails */ | |
1428 | exit(1); | |
1429 | } | |
1430 | n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; | |
1431 | free_option_parameters(param); | |
1432 | ||
1433 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); | |
c2abccec MK |
1434 | if (!bs) { |
1435 | return 1; | |
1436 | } | |
ae6b0ed6 SH |
1437 | |
1438 | if (relative) { | |
1439 | total_size = bdrv_getlength(bs) + n * relative; | |
1440 | } else { | |
1441 | total_size = n; | |
1442 | } | |
1443 | if (total_size <= 0) { | |
1444 | error("New image size must be positive"); | |
c2abccec MK |
1445 | ret = -1; |
1446 | goto out; | |
ae6b0ed6 SH |
1447 | } |
1448 | ||
1449 | ret = bdrv_truncate(bs, total_size); | |
1450 | switch (ret) { | |
1451 | case 0: | |
1452 | printf("Image resized.\n"); | |
1453 | break; | |
1454 | case -ENOTSUP: | |
1455 | error("This image format does not support resize"); | |
1456 | break; | |
1457 | case -EACCES: | |
1458 | error("Image is read-only"); | |
1459 | break; | |
1460 | default: | |
1461 | error("Error resizing image (%d)", -ret); | |
1462 | break; | |
1463 | } | |
c2abccec | 1464 | out: |
ae6b0ed6 | 1465 | bdrv_delete(bs); |
c2abccec MK |
1466 | if (ret) { |
1467 | return 1; | |
1468 | } | |
ae6b0ed6 SH |
1469 | return 0; |
1470 | } | |
1471 | ||
c227f099 | 1472 | static const img_cmd_t img_cmds[] = { |
153859be SB |
1473 | #define DEF(option, callback, arg_string) \ |
1474 | { option, callback }, | |
1475 | #include "qemu-img-cmds.h" | |
1476 | #undef DEF | |
1477 | #undef GEN_DOCS | |
1478 | { NULL, NULL, }, | |
1479 | }; | |
1480 | ||
ea2384d3 FB |
1481 | int main(int argc, char **argv) |
1482 | { | |
c227f099 | 1483 | const img_cmd_t *cmd; |
153859be | 1484 | const char *cmdname; |
ea2384d3 FB |
1485 | |
1486 | bdrv_init(); | |
1487 | if (argc < 2) | |
1488 | help(); | |
153859be | 1489 | cmdname = argv[1]; |
8f9b157e | 1490 | argc--; argv++; |
153859be SB |
1491 | |
1492 | /* find the command */ | |
1493 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { | |
1494 | if (!strcmp(cmdname, cmd->name)) { | |
1495 | return cmd->handler(argc, argv); | |
1496 | } | |
ea2384d3 | 1497 | } |
153859be SB |
1498 | |
1499 | /* not found */ | |
1500 | help(); | |
ea2384d3 FB |
1501 | return 0; |
1502 | } |