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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 | |
8b7968f7 | 44 | static void GCC_FMT_ATTR(1, 2) error(const char *fmt, ...) |
ea2384d3 FB |
45 | { |
46 | va_list ap; | |
47 | va_start(ap, fmt); | |
57d1a2b6 | 48 | fprintf(stderr, "qemu-img: "); |
ea2384d3 FB |
49 | vfprintf(stderr, fmt, ap); |
50 | fprintf(stderr, "\n"); | |
ea2384d3 FB |
51 | va_end(ap); |
52 | } | |
53 | ||
54 | static void format_print(void *opaque, const char *name) | |
55 | { | |
56 | printf(" %s", name); | |
57 | } | |
58 | ||
d2c639d6 | 59 | /* Please keep in synch with qemu-img.texi */ |
3f379ab1 | 60 | static void help(void) |
ea2384d3 | 61 | { |
e00291c0 PB |
62 | const char *help_msg = |
63 | "qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" | |
3f020d70 | 64 | "usage: qemu-img command [command options]\n" |
65 | "QEMU disk image utility\n" | |
66 | "\n" | |
67 | "Command syntax:\n" | |
153859be SB |
68 | #define DEF(option, callback, arg_string) \ |
69 | " " arg_string "\n" | |
70 | #include "qemu-img-cmds.h" | |
71 | #undef DEF | |
72 | #undef GEN_DOCS | |
3f020d70 | 73 | "\n" |
74 | "Command parameters:\n" | |
75 | " 'filename' is a disk image filename\n" | |
76 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
77 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
78 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n" | |
79 | " and T (terabyte, 1024G) are supported. 'b' is ignored.\n" | |
80 | " 'output_filename' is the destination disk image filename\n" | |
81 | " 'output_fmt' is the destination format\n" | |
82 | " 'options' is a comma separated list of format specific options in a\n" | |
83 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
84 | " used format\n" | |
85 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
86 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
87 | " match exactly. The image doesn't need a working backing file before\n" | |
88 | " rebasing in this case (useful for renaming the backing file)\n" | |
89 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
90 | "\n" | |
91 | "Parameters to snapshot subcommand:\n" | |
92 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
93 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
94 | " '-c' creates a snapshot\n" | |
95 | " '-d' deletes a snapshot\n" | |
e00291c0 PB |
96 | " '-l' lists all snapshots in the given image\n"; |
97 | ||
98 | printf("%s\nSupported formats:", help_msg); | |
ea2384d3 FB |
99 | bdrv_iterate_format(format_print, NULL); |
100 | printf("\n"); | |
101 | exit(1); | |
102 | } | |
103 | ||
ea2384d3 FB |
104 | #if defined(WIN32) |
105 | /* XXX: put correct support for win32 */ | |
106 | static int read_password(char *buf, int buf_size) | |
107 | { | |
108 | int c, i; | |
109 | printf("Password: "); | |
110 | fflush(stdout); | |
111 | i = 0; | |
112 | for(;;) { | |
113 | c = getchar(); | |
114 | if (c == '\n') | |
115 | break; | |
116 | if (i < (buf_size - 1)) | |
117 | buf[i++] = c; | |
118 | } | |
119 | buf[i] = '\0'; | |
120 | return 0; | |
121 | } | |
122 | ||
123 | #else | |
124 | ||
125 | #include <termios.h> | |
126 | ||
127 | static struct termios oldtty; | |
128 | ||
129 | static void term_exit(void) | |
130 | { | |
131 | tcsetattr (0, TCSANOW, &oldtty); | |
132 | } | |
133 | ||
134 | static void term_init(void) | |
135 | { | |
136 | struct termios tty; | |
137 | ||
138 | tcgetattr (0, &tty); | |
139 | oldtty = tty; | |
140 | ||
141 | tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP | |
142 | |INLCR|IGNCR|ICRNL|IXON); | |
143 | tty.c_oflag |= OPOST; | |
144 | tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); | |
145 | tty.c_cflag &= ~(CSIZE|PARENB); | |
146 | tty.c_cflag |= CS8; | |
147 | tty.c_cc[VMIN] = 1; | |
148 | tty.c_cc[VTIME] = 0; | |
3b46e624 | 149 | |
ea2384d3 FB |
150 | tcsetattr (0, TCSANOW, &tty); |
151 | ||
152 | atexit(term_exit); | |
153 | } | |
154 | ||
3f379ab1 | 155 | static int read_password(char *buf, int buf_size) |
ea2384d3 FB |
156 | { |
157 | uint8_t ch; | |
158 | int i, ret; | |
159 | ||
160 | printf("password: "); | |
161 | fflush(stdout); | |
162 | term_init(); | |
163 | i = 0; | |
164 | for(;;) { | |
165 | ret = read(0, &ch, 1); | |
166 | if (ret == -1) { | |
167 | if (errno == EAGAIN || errno == EINTR) { | |
168 | continue; | |
169 | } else { | |
170 | ret = -1; | |
171 | break; | |
172 | } | |
173 | } else if (ret == 0) { | |
174 | ret = -1; | |
175 | break; | |
176 | } else { | |
177 | if (ch == '\r') { | |
178 | ret = 0; | |
179 | break; | |
180 | } | |
181 | if (i < (buf_size - 1)) | |
182 | buf[i++] = ch; | |
183 | } | |
184 | } | |
185 | term_exit(); | |
186 | buf[i] = '\0'; | |
187 | printf("\n"); | |
188 | return ret; | |
189 | } | |
190 | #endif | |
191 | ||
4ac8aacd JS |
192 | static int print_block_option_help(const char *filename, const char *fmt) |
193 | { | |
194 | BlockDriver *drv, *proto_drv; | |
195 | QEMUOptionParameter *create_options = NULL; | |
196 | ||
197 | /* Find driver and parse its options */ | |
198 | drv = bdrv_find_format(fmt); | |
199 | if (!drv) { | |
200 | error("Unknown file format '%s'", fmt); | |
201 | return 1; | |
202 | } | |
203 | ||
204 | proto_drv = bdrv_find_protocol(filename); | |
205 | if (!proto_drv) { | |
206 | error("Unknown protocol '%s'", filename); | |
207 | return 1; | |
208 | } | |
209 | ||
210 | create_options = append_option_parameters(create_options, | |
211 | drv->create_options); | |
212 | create_options = append_option_parameters(create_options, | |
213 | proto_drv->create_options); | |
214 | print_option_help(create_options); | |
215 | free_option_parameters(create_options); | |
216 | return 0; | |
217 | } | |
218 | ||
75c23805 | 219 | static BlockDriverState *bdrv_new_open(const char *filename, |
9bc378c1 | 220 | const char *fmt, |
f163d073 | 221 | int flags) |
75c23805 FB |
222 | { |
223 | BlockDriverState *bs; | |
224 | BlockDriver *drv; | |
225 | char password[256]; | |
226 | ||
227 | bs = bdrv_new(""); | |
c2abccec | 228 | if (!bs) { |
75c23805 | 229 | error("Not enough memory"); |
c2abccec MK |
230 | goto fail; |
231 | } | |
75c23805 FB |
232 | if (fmt) { |
233 | drv = bdrv_find_format(fmt); | |
c2abccec | 234 | if (!drv) { |
75c23805 | 235 | error("Unknown file format '%s'", fmt); |
c2abccec MK |
236 | goto fail; |
237 | } | |
75c23805 FB |
238 | } else { |
239 | drv = NULL; | |
240 | } | |
d6e9098e | 241 | if (bdrv_open(bs, filename, flags, drv) < 0) { |
75c23805 | 242 | error("Could not open '%s'", filename); |
c2abccec | 243 | goto fail; |
75c23805 FB |
244 | } |
245 | if (bdrv_is_encrypted(bs)) { | |
246 | printf("Disk image '%s' is encrypted.\n", filename); | |
c2abccec | 247 | if (read_password(password, sizeof(password)) < 0) { |
75c23805 | 248 | error("No password given"); |
c2abccec MK |
249 | goto fail; |
250 | } | |
251 | if (bdrv_set_key(bs, password) < 0) { | |
75c23805 | 252 | error("invalid password"); |
c2abccec MK |
253 | goto fail; |
254 | } | |
75c23805 FB |
255 | } |
256 | return bs; | |
c2abccec MK |
257 | fail: |
258 | if (bs) { | |
259 | bdrv_delete(bs); | |
260 | } | |
261 | return NULL; | |
75c23805 FB |
262 | } |
263 | ||
c2abccec | 264 | static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
eec77d9e JS |
265 | const char *base_filename, |
266 | const char *base_fmt) | |
efa84d43 | 267 | { |
efa84d43 KW |
268 | if (base_filename) { |
269 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { | |
270 | error("Backing file not supported for file format '%s'", fmt); | |
c2abccec | 271 | return -1; |
efa84d43 KW |
272 | } |
273 | } | |
274 | if (base_fmt) { | |
275 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { | |
276 | error("Backing file format not supported for file format '%s'", fmt); | |
c2abccec | 277 | return -1; |
efa84d43 KW |
278 | } |
279 | } | |
c2abccec | 280 | return 0; |
efa84d43 KW |
281 | } |
282 | ||
ea2384d3 FB |
283 | static int img_create(int argc, char **argv) |
284 | { | |
eec77d9e | 285 | int c, ret = 0; |
1da7cfbd | 286 | uint64_t img_size = -1; |
ea2384d3 | 287 | const char *fmt = "raw"; |
9230eaf6 | 288 | const char *base_fmt = NULL; |
ea2384d3 FB |
289 | const char *filename; |
290 | const char *base_filename = NULL; | |
b50cbabc MK |
291 | BlockDriver *drv, *proto_drv; |
292 | QEMUOptionParameter *param = NULL, *create_options = NULL; | |
5eeaad5a | 293 | QEMUOptionParameter *backing_fmt = NULL; |
9ea2ea71 | 294 | char *options = NULL; |
3b46e624 | 295 | |
ea2384d3 | 296 | for(;;) { |
9ea2ea71 | 297 | c = getopt(argc, argv, "F:b:f:he6o:"); |
b8fb60da | 298 | if (c == -1) { |
ea2384d3 | 299 | break; |
b8fb60da | 300 | } |
ea2384d3 | 301 | switch(c) { |
ef87394c | 302 | case '?': |
ea2384d3 FB |
303 | case 'h': |
304 | help(); | |
305 | break; | |
9230eaf6 AL |
306 | case 'F': |
307 | base_fmt = optarg; | |
308 | break; | |
ea2384d3 FB |
309 | case 'b': |
310 | base_filename = optarg; | |
311 | break; | |
312 | case 'f': | |
313 | fmt = optarg; | |
314 | break; | |
315 | case 'e': | |
eec77d9e JS |
316 | error("qemu-img: option -e is deprecated, please use \'-o " |
317 | "encryption\' instead!"); | |
318 | return 1; | |
d8871c5a | 319 | case '6': |
eec77d9e JS |
320 | error("qemu-img: option -6 is deprecated, please use \'-o " |
321 | "compat6\' instead!"); | |
322 | return 1; | |
9ea2ea71 KW |
323 | case 'o': |
324 | options = optarg; | |
325 | break; | |
ea2384d3 FB |
326 | } |
327 | } | |
9230eaf6 | 328 | |
b50cbabc | 329 | /* Get the filename */ |
b8fb60da | 330 | if (optind >= argc) { |
b50cbabc | 331 | help(); |
b8fb60da | 332 | } |
b50cbabc MK |
333 | filename = argv[optind++]; |
334 | ||
1da7cfbd JS |
335 | /* Get image size, if specified */ |
336 | if (optind < argc) { | |
337 | ssize_t sval; | |
338 | sval = strtosz_suffix(argv[optind++], NULL, STRTOSZ_DEFSUFFIX_B); | |
339 | if (sval < 0) { | |
340 | error("Invalid image size specified! You may use k, M, G or " | |
341 | "T suffixes for "); | |
342 | error("kilobytes, megabytes, gigabytes and terabytes."); | |
343 | ret = -1; | |
344 | goto out; | |
345 | } | |
346 | img_size = (uint64_t)sval; | |
347 | } | |
348 | ||
4ac8aacd JS |
349 | if (options && !strcmp(options, "?")) { |
350 | ret = print_block_option_help(filename, fmt); | |
351 | goto out; | |
352 | } | |
353 | ||
9ea2ea71 KW |
354 | /* Find driver and parse its options */ |
355 | drv = bdrv_find_format(fmt); | |
c2abccec | 356 | if (!drv) { |
9ea2ea71 | 357 | error("Unknown file format '%s'", fmt); |
2a81998a JS |
358 | ret = -1; |
359 | goto out; | |
c2abccec | 360 | } |
9230eaf6 | 361 | |
b50cbabc | 362 | proto_drv = bdrv_find_protocol(filename); |
c2abccec | 363 | if (!proto_drv) { |
b50cbabc | 364 | error("Unknown protocol '%s'", filename); |
2a81998a JS |
365 | ret = -1; |
366 | goto out; | |
c2abccec | 367 | } |
b50cbabc MK |
368 | |
369 | create_options = append_option_parameters(create_options, | |
370 | drv->create_options); | |
371 | create_options = append_option_parameters(create_options, | |
372 | proto_drv->create_options); | |
373 | ||
9f56640c | 374 | /* Create parameter list with default values */ |
b50cbabc | 375 | param = parse_option_parameters("", create_options, param); |
1da7cfbd JS |
376 | |
377 | set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size); | |
9f56640c KW |
378 | |
379 | /* Parse -o options */ | |
9ea2ea71 | 380 | if (options) { |
b50cbabc | 381 | param = parse_option_parameters(options, create_options, param); |
9ea2ea71 KW |
382 | if (param == NULL) { |
383 | error("Invalid options for file format '%s'.", fmt); | |
c2abccec MK |
384 | ret = -1; |
385 | goto out; | |
9ea2ea71 | 386 | } |
9ea2ea71 KW |
387 | } |
388 | ||
9ea2ea71 | 389 | /* Add old-style options to parameters */ |
eec77d9e | 390 | ret = add_old_style_options(fmt, param, base_filename, base_fmt); |
c2abccec MK |
391 | if (ret < 0) { |
392 | goto out; | |
393 | } | |
9ea2ea71 | 394 | |
5eeaad5a SH |
395 | backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
396 | if (backing_fmt && backing_fmt->value.s) { | |
397 | if (!bdrv_find_format(backing_fmt->value.s)) { | |
398 | error("Unknown backing file format '%s'", | |
399 | backing_fmt->value.s); | |
400 | ret = -1; | |
401 | goto out; | |
402 | } | |
403 | } | |
404 | ||
9ea2ea71 KW |
405 | // The size for the image must always be specified, with one exception: |
406 | // If we are using a backing file, we can obtain the size from there | |
9f56640c | 407 | if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { |
9ea2ea71 KW |
408 | |
409 | QEMUOptionParameter *backing_file = | |
410 | get_option_parameter(param, BLOCK_OPT_BACKING_FILE); | |
9ea2ea71 KW |
411 | |
412 | if (backing_file && backing_file->value.s) { | |
413 | BlockDriverState *bs; | |
414 | uint64_t size; | |
415 | const char *fmt = NULL; | |
416 | char buf[32]; | |
417 | ||
418 | if (backing_fmt && backing_fmt->value.s) { | |
5eeaad5a | 419 | fmt = backing_fmt->value.s; |
9ea2ea71 KW |
420 | } |
421 | ||
adfe078e | 422 | bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS); |
c2abccec MK |
423 | if (!bs) { |
424 | ret = -1; | |
425 | goto out; | |
426 | } | |
9ea2ea71 KW |
427 | bdrv_get_geometry(bs, &size); |
428 | size *= 512; | |
429 | bdrv_delete(bs); | |
430 | ||
431 | snprintf(buf, sizeof(buf), "%" PRId64, size); | |
432 | set_option_parameter(param, BLOCK_OPT_SIZE, buf); | |
433 | } else { | |
434 | error("Image creation needs a size parameter"); | |
c2abccec MK |
435 | ret = -1; |
436 | goto out; | |
9ea2ea71 | 437 | } |
75c23805 | 438 | } |
9ea2ea71 KW |
439 | |
440 | printf("Formatting '%s', fmt=%s ", filename, fmt); | |
441 | print_option_parameters(param); | |
442 | puts(""); | |
443 | ||
444 | ret = bdrv_create(drv, filename, param); | |
9ea2ea71 | 445 | |
ea2384d3 FB |
446 | if (ret < 0) { |
447 | if (ret == -ENOTSUP) { | |
3c56521b | 448 | error("Formatting or formatting option not supported for file format '%s'", fmt); |
6e9ea0c0 AJ |
449 | } else if (ret == -EFBIG) { |
450 | error("The image size is too large for file format '%s'", fmt); | |
ea2384d3 | 451 | } else { |
3e7896de | 452 | error("%s: error while creating %s: %s", filename, fmt, strerror(-ret)); |
ea2384d3 FB |
453 | } |
454 | } | |
c2abccec | 455 | out: |
a87a6721 SH |
456 | free_option_parameters(create_options); |
457 | free_option_parameters(param); | |
c2abccec MK |
458 | if (ret) { |
459 | return 1; | |
460 | } | |
ea2384d3 FB |
461 | return 0; |
462 | } | |
463 | ||
e076f338 KW |
464 | /* |
465 | * Checks an image for consistency. Exit codes: | |
466 | * | |
467 | * 0 - Check completed, image is good | |
468 | * 1 - Check not completed because of internal errors | |
469 | * 2 - Check completed, image is corrupted | |
470 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
471 | */ | |
1585969c AL |
472 | static int img_check(int argc, char **argv) |
473 | { | |
474 | int c, ret; | |
475 | const char *filename, *fmt; | |
1585969c | 476 | BlockDriverState *bs; |
e076f338 | 477 | BdrvCheckResult result; |
1585969c AL |
478 | |
479 | fmt = NULL; | |
480 | for(;;) { | |
481 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 482 | if (c == -1) { |
1585969c | 483 | break; |
b8fb60da | 484 | } |
1585969c | 485 | switch(c) { |
ef87394c | 486 | case '?': |
1585969c AL |
487 | case 'h': |
488 | help(); | |
489 | break; | |
490 | case 'f': | |
491 | fmt = optarg; | |
492 | break; | |
493 | } | |
494 | } | |
b8fb60da | 495 | if (optind >= argc) { |
1585969c | 496 | help(); |
b8fb60da | 497 | } |
1585969c AL |
498 | filename = argv[optind++]; |
499 | ||
adfe078e | 500 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
c2abccec MK |
501 | if (!bs) { |
502 | return 1; | |
503 | } | |
e076f338 KW |
504 | ret = bdrv_check(bs, &result); |
505 | ||
506 | if (ret == -ENOTSUP) { | |
1585969c | 507 | error("This image format does not support checks"); |
e076f338 KW |
508 | bdrv_delete(bs); |
509 | return 1; | |
510 | } | |
511 | ||
512 | if (!(result.corruptions || result.leaks || result.check_errors)) { | |
513 | printf("No errors were found on the image.\n"); | |
514 | } else { | |
515 | if (result.corruptions) { | |
516 | printf("\n%d errors were found on the image.\n" | |
517 | "Data may be corrupted, or further writes to the image " | |
518 | "may corrupt it.\n", | |
519 | result.corruptions); | |
520 | } | |
521 | ||
522 | if (result.leaks) { | |
523 | printf("\n%d leaked clusters were found on the image.\n" | |
524 | "This means waste of disk space, but no harm to data.\n", | |
525 | result.leaks); | |
526 | } | |
527 | ||
528 | if (result.check_errors) { | |
529 | printf("\n%d internal errors have occurred during the check.\n", | |
530 | result.check_errors); | |
1585969c | 531 | } |
1585969c AL |
532 | } |
533 | ||
534 | bdrv_delete(bs); | |
e076f338 KW |
535 | |
536 | if (ret < 0 || result.check_errors) { | |
537 | printf("\nAn error has occurred during the check: %s\n" | |
538 | "The check is not complete and may have missed error.\n", | |
539 | strerror(-ret)); | |
c2abccec MK |
540 | return 1; |
541 | } | |
e076f338 KW |
542 | |
543 | if (result.corruptions) { | |
544 | return 2; | |
545 | } else if (result.leaks) { | |
546 | return 3; | |
547 | } else { | |
548 | return 0; | |
549 | } | |
1585969c AL |
550 | } |
551 | ||
ea2384d3 FB |
552 | static int img_commit(int argc, char **argv) |
553 | { | |
554 | int c, ret; | |
555 | const char *filename, *fmt; | |
ea2384d3 FB |
556 | BlockDriverState *bs; |
557 | ||
558 | fmt = NULL; | |
559 | for(;;) { | |
560 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 561 | if (c == -1) { |
ea2384d3 | 562 | break; |
b8fb60da | 563 | } |
ea2384d3 | 564 | switch(c) { |
ef87394c | 565 | case '?': |
ea2384d3 FB |
566 | case 'h': |
567 | help(); | |
568 | break; | |
569 | case 'f': | |
570 | fmt = optarg; | |
571 | break; | |
572 | } | |
573 | } | |
b8fb60da | 574 | if (optind >= argc) { |
ea2384d3 | 575 | help(); |
b8fb60da | 576 | } |
ea2384d3 FB |
577 | filename = argv[optind++]; |
578 | ||
adfe078e | 579 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
c2abccec MK |
580 | if (!bs) { |
581 | return 1; | |
582 | } | |
ea2384d3 FB |
583 | ret = bdrv_commit(bs); |
584 | switch(ret) { | |
585 | case 0: | |
586 | printf("Image committed.\n"); | |
587 | break; | |
588 | case -ENOENT: | |
589 | error("No disk inserted"); | |
590 | break; | |
591 | case -EACCES: | |
592 | error("Image is read-only"); | |
593 | break; | |
594 | case -ENOTSUP: | |
595 | error("Image is already committed"); | |
596 | break; | |
597 | default: | |
598 | error("Error while committing image"); | |
599 | break; | |
600 | } | |
601 | ||
602 | bdrv_delete(bs); | |
c2abccec MK |
603 | if (ret) { |
604 | return 1; | |
605 | } | |
ea2384d3 FB |
606 | return 0; |
607 | } | |
608 | ||
609 | static int is_not_zero(const uint8_t *sector, int len) | |
610 | { | |
611 | int i; | |
612 | len >>= 2; | |
613 | for(i = 0;i < len; i++) { | |
614 | if (((uint32_t *)sector)[i] != 0) | |
615 | return 1; | |
616 | } | |
617 | return 0; | |
618 | } | |
619 | ||
f58c7b35 TS |
620 | /* |
621 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
622 | * a non-NUL byte. | |
623 | * | |
624 | * 'pnum' is set to the number of sectors (including and immediately following | |
625 | * the first one) that are known to be in the same allocated/unallocated state. | |
626 | */ | |
ea2384d3 FB |
627 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
628 | { | |
629 | int v, i; | |
630 | ||
631 | if (n <= 0) { | |
632 | *pnum = 0; | |
633 | return 0; | |
634 | } | |
635 | v = is_not_zero(buf, 512); | |
636 | for(i = 1; i < n; i++) { | |
637 | buf += 512; | |
638 | if (v != is_not_zero(buf, 512)) | |
639 | break; | |
640 | } | |
641 | *pnum = i; | |
642 | return v; | |
643 | } | |
644 | ||
3e85c6fd KW |
645 | /* |
646 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
647 | * buffers matches, non-zero otherwise. | |
648 | * | |
649 | * pnum is set to the number of sectors (including and immediately following | |
650 | * the first one) that are known to have the same comparison result | |
651 | */ | |
652 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
653 | int *pnum) | |
654 | { | |
655 | int res, i; | |
656 | ||
657 | if (n <= 0) { | |
658 | *pnum = 0; | |
659 | return 0; | |
660 | } | |
661 | ||
662 | res = !!memcmp(buf1, buf2, 512); | |
663 | for(i = 1; i < n; i++) { | |
664 | buf1 += 512; | |
665 | buf2 += 512; | |
666 | ||
667 | if (!!memcmp(buf1, buf2, 512) != res) { | |
668 | break; | |
669 | } | |
670 | } | |
671 | ||
672 | *pnum = i; | |
673 | return res; | |
674 | } | |
675 | ||
80ee15a6 | 676 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
ea2384d3 FB |
677 | |
678 | static int img_convert(int argc, char **argv) | |
679 | { | |
eec77d9e | 680 | int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
f58c7b35 | 681 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
b50cbabc | 682 | BlockDriver *drv, *proto_drv; |
c2abccec | 683 | BlockDriverState **bs = NULL, *out_bs = NULL; |
96b8f136 TS |
684 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
685 | uint64_t bs_sectors; | |
c2abccec | 686 | uint8_t * buf = NULL; |
ea2384d3 | 687 | const uint8_t *buf1; |
faea38e7 | 688 | BlockDriverInfo bdi; |
b50cbabc | 689 | QEMUOptionParameter *param = NULL, *create_options = NULL; |
a18953fb | 690 | QEMUOptionParameter *out_baseimg_param; |
efa84d43 | 691 | char *options = NULL; |
51ef6727 | 692 | const char *snapshot_name = NULL; |
ea2384d3 FB |
693 | |
694 | fmt = NULL; | |
695 | out_fmt = "raw"; | |
f58c7b35 | 696 | out_baseimg = NULL; |
eec77d9e | 697 | compress = 0; |
ea2384d3 | 698 | for(;;) { |
51ef6727 | 699 | c = getopt(argc, argv, "f:O:B:s:hce6o:"); |
b8fb60da | 700 | if (c == -1) { |
ea2384d3 | 701 | break; |
b8fb60da | 702 | } |
ea2384d3 | 703 | switch(c) { |
ef87394c | 704 | case '?': |
ea2384d3 FB |
705 | case 'h': |
706 | help(); | |
707 | break; | |
708 | case 'f': | |
709 | fmt = optarg; | |
710 | break; | |
711 | case 'O': | |
712 | out_fmt = optarg; | |
713 | break; | |
f58c7b35 TS |
714 | case 'B': |
715 | out_baseimg = optarg; | |
716 | break; | |
ea2384d3 | 717 | case 'c': |
eec77d9e | 718 | compress = 1; |
ea2384d3 FB |
719 | break; |
720 | case 'e': | |
eec77d9e JS |
721 | error("qemu-img: option -e is deprecated, please use \'-o " |
722 | "encryption\' instead!"); | |
723 | return 1; | |
ec36ba14 | 724 | case '6': |
eec77d9e JS |
725 | error("qemu-img: option -6 is deprecated, please use \'-o " |
726 | "compat6\' instead!"); | |
727 | return 1; | |
efa84d43 KW |
728 | case 'o': |
729 | options = optarg; | |
730 | break; | |
51ef6727 | 731 | case 's': |
732 | snapshot_name = optarg; | |
733 | break; | |
ea2384d3 FB |
734 | } |
735 | } | |
3b46e624 | 736 | |
926c2d23 | 737 | bs_n = argc - optind - 1; |
b8fb60da JS |
738 | if (bs_n < 1) { |
739 | help(); | |
740 | } | |
926c2d23 AZ |
741 | |
742 | out_filename = argv[argc - 1]; | |
f58c7b35 | 743 | |
4ac8aacd JS |
744 | if (options && !strcmp(options, "?")) { |
745 | ret = print_block_option_help(out_filename, out_fmt); | |
746 | goto out; | |
747 | } | |
748 | ||
c2abccec | 749 | if (bs_n > 1 && out_baseimg) { |
f58c7b35 | 750 | error("-B makes no sense when concatenating multiple input images"); |
31ca34b8 JS |
751 | ret = -1; |
752 | goto out; | |
c2abccec | 753 | } |
926c2d23 | 754 | |
5bdf61fd | 755 | bs = qemu_mallocz(bs_n * sizeof(BlockDriverState *)); |
926c2d23 AZ |
756 | |
757 | total_sectors = 0; | |
758 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
adfe078e | 759 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
c2abccec | 760 | if (!bs[bs_i]) { |
926c2d23 | 761 | error("Could not open '%s'", argv[optind + bs_i]); |
c2abccec MK |
762 | ret = -1; |
763 | goto out; | |
764 | } | |
926c2d23 AZ |
765 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
766 | total_sectors += bs_sectors; | |
767 | } | |
ea2384d3 | 768 | |
51ef6727 | 769 | if (snapshot_name != NULL) { |
770 | if (bs_n > 1) { | |
771 | error("No support for concatenating multiple snapshot\n"); | |
772 | ret = -1; | |
773 | goto out; | |
774 | } | |
775 | if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { | |
776 | error("Failed to load snapshot\n"); | |
777 | ret = -1; | |
778 | goto out; | |
779 | } | |
780 | } | |
781 | ||
efa84d43 | 782 | /* Find driver and parse its options */ |
ea2384d3 | 783 | drv = bdrv_find_format(out_fmt); |
c2abccec | 784 | if (!drv) { |
d34dda5e | 785 | error("Unknown file format '%s'", out_fmt); |
c2abccec MK |
786 | ret = -1; |
787 | goto out; | |
788 | } | |
efa84d43 | 789 | |
b50cbabc | 790 | proto_drv = bdrv_find_protocol(out_filename); |
c2abccec | 791 | if (!proto_drv) { |
b50cbabc | 792 | error("Unknown protocol '%s'", out_filename); |
c2abccec MK |
793 | ret = -1; |
794 | goto out; | |
795 | } | |
b50cbabc MK |
796 | |
797 | create_options = append_option_parameters(create_options, | |
798 | drv->create_options); | |
799 | create_options = append_option_parameters(create_options, | |
800 | proto_drv->create_options); | |
db08adf5 | 801 | |
efa84d43 | 802 | if (options) { |
b50cbabc | 803 | param = parse_option_parameters(options, create_options, param); |
efa84d43 KW |
804 | if (param == NULL) { |
805 | error("Invalid options for file format '%s'.", out_fmt); | |
c2abccec MK |
806 | ret = -1; |
807 | goto out; | |
efa84d43 KW |
808 | } |
809 | } else { | |
b50cbabc | 810 | param = parse_option_parameters("", create_options, param); |
efa84d43 KW |
811 | } |
812 | ||
813 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); | |
eec77d9e | 814 | ret = add_old_style_options(out_fmt, param, out_baseimg, NULL); |
c2abccec MK |
815 | if (ret < 0) { |
816 | goto out; | |
817 | } | |
efa84d43 | 818 | |
a18953fb KW |
819 | /* Get backing file name if -o backing_file was used */ |
820 | out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); | |
821 | if (out_baseimg_param) { | |
822 | out_baseimg = out_baseimg_param->value.s; | |
823 | } | |
824 | ||
efa84d43 | 825 | /* Check if compression is supported */ |
eec77d9e | 826 | if (compress) { |
efa84d43 KW |
827 | QEMUOptionParameter *encryption = |
828 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); | |
829 | ||
830 | if (!drv->bdrv_write_compressed) { | |
831 | error("Compression not supported for this file format"); | |
c2abccec MK |
832 | ret = -1; |
833 | goto out; | |
efa84d43 KW |
834 | } |
835 | ||
836 | if (encryption && encryption->value.n) { | |
837 | error("Compression and encryption not supported at the same time"); | |
c2abccec MK |
838 | ret = -1; |
839 | goto out; | |
efa84d43 KW |
840 | } |
841 | } | |
842 | ||
843 | /* Create the new image */ | |
844 | ret = bdrv_create(drv, out_filename, param); | |
ea2384d3 FB |
845 | if (ret < 0) { |
846 | if (ret == -ENOTSUP) { | |
93c65b47 | 847 | error("Formatting not supported for file format '%s'", out_fmt); |
6e9ea0c0 AJ |
848 | } else if (ret == -EFBIG) { |
849 | error("The image size is too large for file format '%s'", out_fmt); | |
ea2384d3 | 850 | } else { |
3e7896de | 851 | error("%s: error while converting %s: %s", out_filename, out_fmt, strerror(-ret)); |
ea2384d3 | 852 | } |
c2abccec | 853 | goto out; |
ea2384d3 | 854 | } |
3b46e624 | 855 | |
1bd8e175 KW |
856 | out_bs = bdrv_new_open(out_filename, out_fmt, |
857 | BDRV_O_FLAGS | BDRV_O_RDWR | BDRV_O_NO_FLUSH); | |
c2abccec MK |
858 | if (!out_bs) { |
859 | ret = -1; | |
860 | goto out; | |
861 | } | |
ea2384d3 | 862 | |
926c2d23 AZ |
863 | bs_i = 0; |
864 | bs_offset = 0; | |
865 | bdrv_get_geometry(bs[0], &bs_sectors); | |
d6771bfa | 866 | buf = qemu_malloc(IO_BUF_SIZE); |
926c2d23 | 867 | |
eec77d9e | 868 | if (compress) { |
c2abccec MK |
869 | ret = bdrv_get_info(out_bs, &bdi); |
870 | if (ret < 0) { | |
faea38e7 | 871 | error("could not get block driver info"); |
c2abccec MK |
872 | goto out; |
873 | } | |
faea38e7 | 874 | cluster_size = bdi.cluster_size; |
c2abccec | 875 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
ea2384d3 | 876 | error("invalid cluster size"); |
c2abccec MK |
877 | ret = -1; |
878 | goto out; | |
879 | } | |
ea2384d3 FB |
880 | cluster_sectors = cluster_size >> 9; |
881 | sector_num = 0; | |
882 | for(;;) { | |
926c2d23 AZ |
883 | int64_t bs_num; |
884 | int remainder; | |
885 | uint8_t *buf2; | |
886 | ||
ea2384d3 FB |
887 | nb_sectors = total_sectors - sector_num; |
888 | if (nb_sectors <= 0) | |
889 | break; | |
890 | if (nb_sectors >= cluster_sectors) | |
891 | n = cluster_sectors; | |
892 | else | |
893 | n = nb_sectors; | |
926c2d23 AZ |
894 | |
895 | bs_num = sector_num - bs_offset; | |
896 | assert (bs_num >= 0); | |
897 | remainder = n; | |
898 | buf2 = buf; | |
899 | while (remainder > 0) { | |
900 | int nlow; | |
901 | while (bs_num == bs_sectors) { | |
902 | bs_i++; | |
903 | assert (bs_i < bs_n); | |
904 | bs_offset += bs_sectors; | |
905 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
906 | bs_num = 0; | |
0bfcd599 BS |
907 | /* printf("changing part: sector_num=%" PRId64 ", " |
908 | "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 | |
909 | "\n", sector_num, bs_i, bs_offset, bs_sectors); */ | |
926c2d23 AZ |
910 | } |
911 | assert (bs_num < bs_sectors); | |
912 | ||
913 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; | |
914 | ||
c2abccec MK |
915 | ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
916 | if (ret < 0) { | |
926c2d23 | 917 | error("error while reading"); |
c2abccec MK |
918 | goto out; |
919 | } | |
926c2d23 AZ |
920 | |
921 | buf2 += nlow * 512; | |
922 | bs_num += nlow; | |
923 | ||
924 | remainder -= nlow; | |
925 | } | |
926 | assert (remainder == 0); | |
927 | ||
b8fb60da | 928 | if (n < cluster_sectors) { |
ea2384d3 | 929 | memset(buf + n * 512, 0, cluster_size - n * 512); |
b8fb60da | 930 | } |
ea2384d3 | 931 | if (is_not_zero(buf, cluster_size)) { |
c2abccec MK |
932 | ret = bdrv_write_compressed(out_bs, sector_num, buf, |
933 | cluster_sectors); | |
934 | if (ret != 0) { | |
ec3757de FB |
935 | error("error while compressing sector %" PRId64, |
936 | sector_num); | |
c2abccec MK |
937 | goto out; |
938 | } | |
ea2384d3 FB |
939 | } |
940 | sector_num += n; | |
941 | } | |
faea38e7 FB |
942 | /* signal EOF to align */ |
943 | bdrv_write_compressed(out_bs, 0, NULL, 0); | |
ea2384d3 | 944 | } else { |
f2feebbd KW |
945 | int has_zero_init = bdrv_has_zero_init(out_bs); |
946 | ||
f58c7b35 | 947 | sector_num = 0; // total number of sectors converted so far |
ea2384d3 FB |
948 | for(;;) { |
949 | nb_sectors = total_sectors - sector_num; | |
b8fb60da | 950 | if (nb_sectors <= 0) { |
ea2384d3 | 951 | break; |
b8fb60da JS |
952 | } |
953 | if (nb_sectors >= (IO_BUF_SIZE / 512)) { | |
ea2384d3 | 954 | n = (IO_BUF_SIZE / 512); |
b8fb60da | 955 | } else { |
ea2384d3 | 956 | n = nb_sectors; |
b8fb60da | 957 | } |
926c2d23 AZ |
958 | |
959 | while (sector_num - bs_offset >= bs_sectors) { | |
960 | bs_i ++; | |
961 | assert (bs_i < bs_n); | |
962 | bs_offset += bs_sectors; | |
963 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
0bfcd599 BS |
964 | /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " |
965 | "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", | |
926c2d23 AZ |
966 | sector_num, bs_i, bs_offset, bs_sectors); */ |
967 | } | |
968 | ||
b8fb60da | 969 | if (n > bs_offset + bs_sectors - sector_num) { |
926c2d23 | 970 | n = bs_offset + bs_sectors - sector_num; |
b8fb60da | 971 | } |
926c2d23 | 972 | |
f2feebbd | 973 | if (has_zero_init) { |
d032044f AS |
974 | /* If the output image is being created as a copy on write image, |
975 | assume that sectors which are unallocated in the input image | |
976 | are present in both the output's and input's base images (no | |
977 | need to copy them). */ | |
978 | if (out_baseimg) { | |
979 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, | |
980 | n, &n1)) { | |
981 | sector_num += n1; | |
982 | continue; | |
983 | } | |
984 | /* The next 'n1' sectors are allocated in the input image. Copy | |
985 | only those as they may be followed by unallocated sectors. */ | |
986 | n = n1; | |
93c65b47 | 987 | } |
93c65b47 AL |
988 | } else { |
989 | n1 = n; | |
f58c7b35 TS |
990 | } |
991 | ||
c2abccec MK |
992 | ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
993 | if (ret < 0) { | |
ea2384d3 | 994 | error("error while reading"); |
c2abccec MK |
995 | goto out; |
996 | } | |
ea2384d3 FB |
997 | /* NOTE: at the same time we convert, we do not write zero |
998 | sectors to have a chance to compress the image. Ideally, we | |
999 | should add a specific call to have the info to go faster */ | |
1000 | buf1 = buf; | |
1001 | while (n > 0) { | |
f58c7b35 TS |
1002 | /* If the output image is being created as a copy on write image, |
1003 | copy all sectors even the ones containing only NUL bytes, | |
93c65b47 AL |
1004 | because they may differ from the sectors in the base image. |
1005 | ||
1006 | If the output is to a host device, we also write out | |
1007 | sectors that are entirely 0, since whatever data was | |
1008 | already there is garbage, not 0s. */ | |
f2feebbd | 1009 | if (!has_zero_init || out_baseimg || |
93c65b47 | 1010 | is_allocated_sectors(buf1, n, &n1)) { |
c2abccec MK |
1011 | ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1012 | if (ret < 0) { | |
ea2384d3 | 1013 | error("error while writing"); |
c2abccec MK |
1014 | goto out; |
1015 | } | |
ea2384d3 FB |
1016 | } |
1017 | sector_num += n1; | |
1018 | n -= n1; | |
1019 | buf1 += n1 * 512; | |
1020 | } | |
1021 | } | |
1022 | } | |
c2abccec MK |
1023 | out: |
1024 | free_option_parameters(create_options); | |
1025 | free_option_parameters(param); | |
d6771bfa | 1026 | qemu_free(buf); |
c2abccec MK |
1027 | if (out_bs) { |
1028 | bdrv_delete(out_bs); | |
1029 | } | |
31ca34b8 JS |
1030 | if (bs) { |
1031 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
1032 | if (bs[bs_i]) { | |
1033 | bdrv_delete(bs[bs_i]); | |
1034 | } | |
c2abccec | 1035 | } |
31ca34b8 | 1036 | qemu_free(bs); |
c2abccec | 1037 | } |
c2abccec MK |
1038 | if (ret) { |
1039 | return 1; | |
1040 | } | |
ea2384d3 FB |
1041 | return 0; |
1042 | } | |
1043 | ||
57d1a2b6 FB |
1044 | #ifdef _WIN32 |
1045 | static int64_t get_allocated_file_size(const char *filename) | |
1046 | { | |
e8445331 FB |
1047 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
1048 | get_compressed_t get_compressed; | |
57d1a2b6 | 1049 | struct _stati64 st; |
e8445331 FB |
1050 | |
1051 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
1052 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); | |
1053 | if (get_compressed) { | |
1054 | DWORD high, low; | |
1055 | low = get_compressed(filename, &high); | |
1056 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) | |
1057 | return (((int64_t) high) << 32) + low; | |
1058 | } | |
1059 | ||
5fafdf24 | 1060 | if (_stati64(filename, &st) < 0) |
57d1a2b6 FB |
1061 | return -1; |
1062 | return st.st_size; | |
1063 | } | |
1064 | #else | |
1065 | static int64_t get_allocated_file_size(const char *filename) | |
1066 | { | |
1067 | struct stat st; | |
5fafdf24 | 1068 | if (stat(filename, &st) < 0) |
57d1a2b6 FB |
1069 | return -1; |
1070 | return (int64_t)st.st_blocks * 512; | |
1071 | } | |
1072 | #endif | |
1073 | ||
faea38e7 FB |
1074 | static void dump_snapshots(BlockDriverState *bs) |
1075 | { | |
1076 | QEMUSnapshotInfo *sn_tab, *sn; | |
1077 | int nb_sns, i; | |
1078 | char buf[256]; | |
1079 | ||
1080 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
1081 | if (nb_sns <= 0) | |
1082 | return; | |
1083 | printf("Snapshot list:\n"); | |
1084 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
1085 | for(i = 0; i < nb_sns; i++) { | |
1086 | sn = &sn_tab[i]; | |
1087 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
1088 | } | |
1089 | qemu_free(sn_tab); | |
1090 | } | |
1091 | ||
ea2384d3 FB |
1092 | static int img_info(int argc, char **argv) |
1093 | { | |
1094 | int c; | |
1095 | const char *filename, *fmt; | |
ea2384d3 FB |
1096 | BlockDriverState *bs; |
1097 | char fmt_name[128], size_buf[128], dsize_buf[128]; | |
96b8f136 TS |
1098 | uint64_t total_sectors; |
1099 | int64_t allocated_size; | |
93b6b2a3 FB |
1100 | char backing_filename[1024]; |
1101 | char backing_filename2[1024]; | |
faea38e7 | 1102 | BlockDriverInfo bdi; |
ea2384d3 FB |
1103 | |
1104 | fmt = NULL; | |
1105 | for(;;) { | |
1106 | c = getopt(argc, argv, "f:h"); | |
b8fb60da | 1107 | if (c == -1) { |
ea2384d3 | 1108 | break; |
b8fb60da | 1109 | } |
ea2384d3 | 1110 | switch(c) { |
ef87394c | 1111 | case '?': |
ea2384d3 FB |
1112 | case 'h': |
1113 | help(); | |
1114 | break; | |
1115 | case 'f': | |
1116 | fmt = optarg; | |
1117 | break; | |
1118 | } | |
1119 | } | |
b8fb60da | 1120 | if (optind >= argc) { |
ea2384d3 | 1121 | help(); |
b8fb60da | 1122 | } |
ea2384d3 FB |
1123 | filename = argv[optind++]; |
1124 | ||
adfe078e | 1125 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
c2abccec MK |
1126 | if (!bs) { |
1127 | return 1; | |
1128 | } | |
ea2384d3 FB |
1129 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
1130 | bdrv_get_geometry(bs, &total_sectors); | |
1131 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); | |
57d1a2b6 | 1132 | allocated_size = get_allocated_file_size(filename); |
b8fb60da | 1133 | if (allocated_size < 0) { |
a10ea30b | 1134 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
b8fb60da | 1135 | } else { |
5fafdf24 | 1136 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
de167e41 | 1137 | allocated_size); |
b8fb60da | 1138 | } |
ea2384d3 FB |
1139 | printf("image: %s\n" |
1140 | "file format: %s\n" | |
ec3757de | 1141 | "virtual size: %s (%" PRId64 " bytes)\n" |
ea2384d3 | 1142 | "disk size: %s\n", |
5fafdf24 | 1143 | filename, fmt_name, size_buf, |
ec3757de | 1144 | (total_sectors * 512), |
ea2384d3 | 1145 | dsize_buf); |
b8fb60da | 1146 | if (bdrv_is_encrypted(bs)) { |
ea2384d3 | 1147 | printf("encrypted: yes\n"); |
b8fb60da | 1148 | } |
faea38e7 | 1149 | if (bdrv_get_info(bs, &bdi) >= 0) { |
b8fb60da | 1150 | if (bdi.cluster_size != 0) { |
faea38e7 | 1151 | printf("cluster_size: %d\n", bdi.cluster_size); |
b8fb60da | 1152 | } |
faea38e7 | 1153 | } |
93b6b2a3 | 1154 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
faea38e7 | 1155 | if (backing_filename[0] != '\0') { |
93b6b2a3 FB |
1156 | path_combine(backing_filename2, sizeof(backing_filename2), |
1157 | filename, backing_filename); | |
5fafdf24 | 1158 | printf("backing file: %s (actual path: %s)\n", |
93b6b2a3 FB |
1159 | backing_filename, |
1160 | backing_filename2); | |
faea38e7 FB |
1161 | } |
1162 | dump_snapshots(bs); | |
ea2384d3 FB |
1163 | bdrv_delete(bs); |
1164 | return 0; | |
1165 | } | |
1166 | ||
f7b4a940 AL |
1167 | #define SNAPSHOT_LIST 1 |
1168 | #define SNAPSHOT_CREATE 2 | |
1169 | #define SNAPSHOT_APPLY 3 | |
1170 | #define SNAPSHOT_DELETE 4 | |
1171 | ||
153859be | 1172 | static int img_snapshot(int argc, char **argv) |
f7b4a940 AL |
1173 | { |
1174 | BlockDriverState *bs; | |
1175 | QEMUSnapshotInfo sn; | |
1176 | char *filename, *snapshot_name = NULL; | |
c2abccec | 1177 | int c, ret = 0, bdrv_oflags; |
f7b4a940 AL |
1178 | int action = 0; |
1179 | qemu_timeval tv; | |
1180 | ||
f5edb014 | 1181 | bdrv_oflags = BDRV_O_RDWR; |
f7b4a940 AL |
1182 | /* Parse commandline parameters */ |
1183 | for(;;) { | |
1184 | c = getopt(argc, argv, "la:c:d:h"); | |
b8fb60da | 1185 | if (c == -1) { |
f7b4a940 | 1186 | break; |
b8fb60da | 1187 | } |
f7b4a940 | 1188 | switch(c) { |
ef87394c | 1189 | case '?': |
f7b4a940 AL |
1190 | case 'h': |
1191 | help(); | |
153859be | 1192 | return 0; |
f7b4a940 AL |
1193 | case 'l': |
1194 | if (action) { | |
1195 | help(); | |
153859be | 1196 | return 0; |
f7b4a940 AL |
1197 | } |
1198 | action = SNAPSHOT_LIST; | |
f5edb014 | 1199 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
f7b4a940 AL |
1200 | break; |
1201 | case 'a': | |
1202 | if (action) { | |
1203 | help(); | |
153859be | 1204 | return 0; |
f7b4a940 AL |
1205 | } |
1206 | action = SNAPSHOT_APPLY; | |
1207 | snapshot_name = optarg; | |
1208 | break; | |
1209 | case 'c': | |
1210 | if (action) { | |
1211 | help(); | |
153859be | 1212 | return 0; |
f7b4a940 AL |
1213 | } |
1214 | action = SNAPSHOT_CREATE; | |
1215 | snapshot_name = optarg; | |
1216 | break; | |
1217 | case 'd': | |
1218 | if (action) { | |
1219 | help(); | |
153859be | 1220 | return 0; |
f7b4a940 AL |
1221 | } |
1222 | action = SNAPSHOT_DELETE; | |
1223 | snapshot_name = optarg; | |
1224 | break; | |
1225 | } | |
1226 | } | |
1227 | ||
b8fb60da | 1228 | if (optind >= argc) { |
f7b4a940 | 1229 | help(); |
b8fb60da | 1230 | } |
f7b4a940 AL |
1231 | filename = argv[optind++]; |
1232 | ||
1233 | /* Open the image */ | |
f163d073 | 1234 | bs = bdrv_new_open(filename, NULL, bdrv_oflags); |
c2abccec MK |
1235 | if (!bs) { |
1236 | return 1; | |
1237 | } | |
f7b4a940 AL |
1238 | |
1239 | /* Perform the requested action */ | |
1240 | switch(action) { | |
1241 | case SNAPSHOT_LIST: | |
1242 | dump_snapshots(bs); | |
1243 | break; | |
1244 | ||
1245 | case SNAPSHOT_CREATE: | |
1246 | memset(&sn, 0, sizeof(sn)); | |
1247 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
1248 | ||
1249 | qemu_gettimeofday(&tv); | |
1250 | sn.date_sec = tv.tv_sec; | |
1251 | sn.date_nsec = tv.tv_usec * 1000; | |
1252 | ||
1253 | ret = bdrv_snapshot_create(bs, &sn); | |
b8fb60da | 1254 | if (ret) { |
f7b4a940 AL |
1255 | error("Could not create snapshot '%s': %d (%s)", |
1256 | snapshot_name, ret, strerror(-ret)); | |
b8fb60da | 1257 | } |
f7b4a940 AL |
1258 | break; |
1259 | ||
1260 | case SNAPSHOT_APPLY: | |
1261 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
b8fb60da | 1262 | if (ret) { |
f7b4a940 AL |
1263 | error("Could not apply snapshot '%s': %d (%s)", |
1264 | snapshot_name, ret, strerror(-ret)); | |
b8fb60da | 1265 | } |
f7b4a940 AL |
1266 | break; |
1267 | ||
1268 | case SNAPSHOT_DELETE: | |
1269 | ret = bdrv_snapshot_delete(bs, snapshot_name); | |
b8fb60da | 1270 | if (ret) { |
f7b4a940 AL |
1271 | error("Could not delete snapshot '%s': %d (%s)", |
1272 | snapshot_name, ret, strerror(-ret)); | |
b8fb60da | 1273 | } |
f7b4a940 AL |
1274 | break; |
1275 | } | |
1276 | ||
1277 | /* Cleanup */ | |
1278 | bdrv_delete(bs); | |
c2abccec MK |
1279 | if (ret) { |
1280 | return 1; | |
1281 | } | |
153859be | 1282 | return 0; |
f7b4a940 AL |
1283 | } |
1284 | ||
3e85c6fd KW |
1285 | static int img_rebase(int argc, char **argv) |
1286 | { | |
c2abccec | 1287 | BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
f163d073 | 1288 | BlockDriver *old_backing_drv, *new_backing_drv; |
3e85c6fd | 1289 | char *filename; |
e53dbee0 | 1290 | const char *fmt, *out_basefmt, *out_baseimg; |
3e85c6fd KW |
1291 | int c, flags, ret; |
1292 | int unsafe = 0; | |
1293 | ||
1294 | /* Parse commandline parameters */ | |
e53dbee0 | 1295 | fmt = NULL; |
3e85c6fd KW |
1296 | out_baseimg = NULL; |
1297 | out_basefmt = NULL; | |
1298 | ||
1299 | for(;;) { | |
e53dbee0 | 1300 | c = getopt(argc, argv, "uhf:F:b:"); |
b8fb60da | 1301 | if (c == -1) { |
3e85c6fd | 1302 | break; |
b8fb60da | 1303 | } |
3e85c6fd | 1304 | switch(c) { |
ef87394c | 1305 | case '?': |
3e85c6fd KW |
1306 | case 'h': |
1307 | help(); | |
1308 | return 0; | |
e53dbee0 KW |
1309 | case 'f': |
1310 | fmt = optarg; | |
1311 | break; | |
3e85c6fd KW |
1312 | case 'F': |
1313 | out_basefmt = optarg; | |
1314 | break; | |
1315 | case 'b': | |
1316 | out_baseimg = optarg; | |
1317 | break; | |
1318 | case 'u': | |
1319 | unsafe = 1; | |
1320 | break; | |
1321 | } | |
1322 | } | |
1323 | ||
b8fb60da | 1324 | if ((optind >= argc) || !out_baseimg) { |
3e85c6fd | 1325 | help(); |
b8fb60da | 1326 | } |
3e85c6fd KW |
1327 | filename = argv[optind++]; |
1328 | ||
1329 | /* | |
1330 | * Open the images. | |
1331 | * | |
1332 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
1333 | * the reference to a renamed or moved backing file. | |
1334 | */ | |
adfe078e | 1335 | flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
f163d073 | 1336 | bs = bdrv_new_open(filename, fmt, flags); |
c2abccec MK |
1337 | if (!bs) { |
1338 | return 1; | |
1339 | } | |
3e85c6fd KW |
1340 | |
1341 | /* Find the right drivers for the backing files */ | |
1342 | old_backing_drv = NULL; | |
1343 | new_backing_drv = NULL; | |
1344 | ||
1345 | if (!unsafe && bs->backing_format[0] != '\0') { | |
1346 | old_backing_drv = bdrv_find_format(bs->backing_format); | |
1347 | if (old_backing_drv == NULL) { | |
1348 | error("Invalid format name: '%s'", bs->backing_format); | |
c2abccec MK |
1349 | ret = -1; |
1350 | goto out; | |
3e85c6fd KW |
1351 | } |
1352 | } | |
1353 | ||
1354 | if (out_basefmt != NULL) { | |
1355 | new_backing_drv = bdrv_find_format(out_basefmt); | |
1356 | if (new_backing_drv == NULL) { | |
1357 | error("Invalid format name: '%s'", out_basefmt); | |
c2abccec MK |
1358 | ret = -1; |
1359 | goto out; | |
3e85c6fd KW |
1360 | } |
1361 | } | |
1362 | ||
1363 | /* For safe rebasing we need to compare old and new backing file */ | |
1364 | if (unsafe) { | |
1365 | /* Make the compiler happy */ | |
1366 | bs_old_backing = NULL; | |
1367 | bs_new_backing = NULL; | |
1368 | } else { | |
1369 | char backing_name[1024]; | |
1370 | ||
1371 | bs_old_backing = bdrv_new("old_backing"); | |
1372 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
c2abccec MK |
1373 | ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1374 | old_backing_drv); | |
1375 | if (ret) { | |
3e85c6fd | 1376 | error("Could not open old backing file '%s'", backing_name); |
c2abccec | 1377 | goto out; |
3e85c6fd KW |
1378 | } |
1379 | ||
1380 | bs_new_backing = bdrv_new("new_backing"); | |
cdbae851 | 1381 | ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
c2abccec MK |
1382 | new_backing_drv); |
1383 | if (ret) { | |
584771e6 | 1384 | error("Could not open new backing file '%s'", out_baseimg); |
c2abccec | 1385 | goto out; |
3e85c6fd KW |
1386 | } |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
1391 | * accesses go to the backing file. We must therefore compare this cluster | |
1392 | * in the old and new backing file, and if they differ we need to copy it | |
1393 | * from the old backing file into the COW file. | |
1394 | * | |
1395 | * If qemu-img crashes during this step, no harm is done. The content of | |
1396 | * the image is the same as the original one at any time. | |
1397 | */ | |
1398 | if (!unsafe) { | |
1399 | uint64_t num_sectors; | |
1400 | uint64_t sector; | |
cc60e327 | 1401 | int n; |
d6771bfa T |
1402 | uint8_t * buf_old; |
1403 | uint8_t * buf_new; | |
1404 | ||
1405 | buf_old = qemu_malloc(IO_BUF_SIZE); | |
1406 | buf_new = qemu_malloc(IO_BUF_SIZE); | |
3e85c6fd KW |
1407 | |
1408 | bdrv_get_geometry(bs, &num_sectors); | |
1409 | ||
1410 | for (sector = 0; sector < num_sectors; sector += n) { | |
1411 | ||
1412 | /* How many sectors can we handle with the next read? */ | |
1413 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
1414 | n = (IO_BUF_SIZE / 512); | |
1415 | } else { | |
1416 | n = num_sectors - sector; | |
1417 | } | |
1418 | ||
1419 | /* If the cluster is allocated, we don't need to take action */ | |
cc60e327 KW |
1420 | ret = bdrv_is_allocated(bs, sector, n, &n); |
1421 | if (ret) { | |
3e85c6fd KW |
1422 | continue; |
1423 | } | |
1424 | ||
1425 | /* Read old and new backing file */ | |
c2abccec MK |
1426 | ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1427 | if (ret < 0) { | |
3e85c6fd | 1428 | error("error while reading from old backing file"); |
c2abccec | 1429 | goto out; |
3e85c6fd | 1430 | } |
c2abccec MK |
1431 | ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1432 | if (ret < 0) { | |
3e85c6fd | 1433 | error("error while reading from new backing file"); |
c2abccec | 1434 | goto out; |
3e85c6fd KW |
1435 | } |
1436 | ||
1437 | /* If they differ, we need to write to the COW file */ | |
1438 | uint64_t written = 0; | |
1439 | ||
1440 | while (written < n) { | |
1441 | int pnum; | |
1442 | ||
1443 | if (compare_sectors(buf_old + written * 512, | |
60b1bd4f | 1444 | buf_new + written * 512, n - written, &pnum)) |
3e85c6fd KW |
1445 | { |
1446 | ret = bdrv_write(bs, sector + written, | |
1447 | buf_old + written * 512, pnum); | |
1448 | if (ret < 0) { | |
1449 | error("Error while writing to COW image: %s", | |
1450 | strerror(-ret)); | |
c2abccec | 1451 | goto out; |
3e85c6fd KW |
1452 | } |
1453 | } | |
1454 | ||
1455 | written += pnum; | |
1456 | } | |
1457 | } | |
d6771bfa T |
1458 | |
1459 | qemu_free(buf_old); | |
1460 | qemu_free(buf_new); | |
3e85c6fd KW |
1461 | } |
1462 | ||
1463 | /* | |
1464 | * Change the backing file. All clusters that are different from the old | |
1465 | * backing file are overwritten in the COW file now, so the visible content | |
1466 | * doesn't change when we switch the backing file. | |
1467 | */ | |
1468 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
1469 | if (ret == -ENOSPC) { | |
1470 | error("Could not change the backing file to '%s': No space left in " | |
1471 | "the file header", out_baseimg); | |
1472 | } else if (ret < 0) { | |
1473 | error("Could not change the backing file to '%s': %s", | |
1474 | out_baseimg, strerror(-ret)); | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * TODO At this point it is possible to check if any clusters that are | |
1479 | * allocated in the COW file are the same in the backing file. If so, they | |
1480 | * could be dropped from the COW file. Don't do this before switching the | |
1481 | * backing file, in case of a crash this would lead to corruption. | |
1482 | */ | |
c2abccec | 1483 | out: |
3e85c6fd KW |
1484 | /* Cleanup */ |
1485 | if (!unsafe) { | |
1486 | bdrv_delete(bs_old_backing); | |
1487 | bdrv_delete(bs_new_backing); | |
1488 | } | |
1489 | ||
1490 | bdrv_delete(bs); | |
c2abccec MK |
1491 | if (ret) { |
1492 | return 1; | |
1493 | } | |
3e85c6fd KW |
1494 | return 0; |
1495 | } | |
1496 | ||
ae6b0ed6 SH |
1497 | static int img_resize(int argc, char **argv) |
1498 | { | |
1499 | int c, ret, relative; | |
1500 | const char *filename, *fmt, *size; | |
1501 | int64_t n, total_size; | |
2a81998a | 1502 | BlockDriverState *bs = NULL; |
ae6b0ed6 SH |
1503 | QEMUOptionParameter *param; |
1504 | QEMUOptionParameter resize_options[] = { | |
1505 | { | |
1506 | .name = BLOCK_OPT_SIZE, | |
1507 | .type = OPT_SIZE, | |
1508 | .help = "Virtual disk size" | |
1509 | }, | |
1510 | { NULL } | |
1511 | }; | |
1512 | ||
1513 | fmt = NULL; | |
1514 | for(;;) { | |
1515 | c = getopt(argc, argv, "f:h"); | |
1516 | if (c == -1) { | |
1517 | break; | |
1518 | } | |
1519 | switch(c) { | |
ef87394c | 1520 | case '?': |
ae6b0ed6 SH |
1521 | case 'h': |
1522 | help(); | |
1523 | break; | |
1524 | case 'f': | |
1525 | fmt = optarg; | |
1526 | break; | |
1527 | } | |
1528 | } | |
1529 | if (optind + 1 >= argc) { | |
1530 | help(); | |
1531 | } | |
1532 | filename = argv[optind++]; | |
1533 | size = argv[optind++]; | |
1534 | ||
1535 | /* Choose grow, shrink, or absolute resize mode */ | |
1536 | switch (size[0]) { | |
1537 | case '+': | |
1538 | relative = 1; | |
1539 | size++; | |
1540 | break; | |
1541 | case '-': | |
1542 | relative = -1; | |
1543 | size++; | |
1544 | break; | |
1545 | default: | |
1546 | relative = 0; | |
1547 | break; | |
1548 | } | |
1549 | ||
1550 | /* Parse size */ | |
1551 | param = parse_option_parameters("", resize_options, NULL); | |
1552 | if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) { | |
1553 | /* Error message already printed when size parsing fails */ | |
2a81998a JS |
1554 | ret = -1; |
1555 | goto out; | |
ae6b0ed6 SH |
1556 | } |
1557 | n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; | |
1558 | free_option_parameters(param); | |
1559 | ||
1560 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); | |
c2abccec | 1561 | if (!bs) { |
2a81998a JS |
1562 | ret = -1; |
1563 | goto out; | |
c2abccec | 1564 | } |
ae6b0ed6 SH |
1565 | |
1566 | if (relative) { | |
1567 | total_size = bdrv_getlength(bs) + n * relative; | |
1568 | } else { | |
1569 | total_size = n; | |
1570 | } | |
1571 | if (total_size <= 0) { | |
1572 | error("New image size must be positive"); | |
c2abccec MK |
1573 | ret = -1; |
1574 | goto out; | |
ae6b0ed6 SH |
1575 | } |
1576 | ||
1577 | ret = bdrv_truncate(bs, total_size); | |
1578 | switch (ret) { | |
1579 | case 0: | |
1580 | printf("Image resized.\n"); | |
1581 | break; | |
1582 | case -ENOTSUP: | |
1583 | error("This image format does not support resize"); | |
1584 | break; | |
1585 | case -EACCES: | |
1586 | error("Image is read-only"); | |
1587 | break; | |
1588 | default: | |
1589 | error("Error resizing image (%d)", -ret); | |
1590 | break; | |
1591 | } | |
c2abccec | 1592 | out: |
2a81998a JS |
1593 | if (bs) { |
1594 | bdrv_delete(bs); | |
1595 | } | |
c2abccec MK |
1596 | if (ret) { |
1597 | return 1; | |
1598 | } | |
ae6b0ed6 SH |
1599 | return 0; |
1600 | } | |
1601 | ||
c227f099 | 1602 | static const img_cmd_t img_cmds[] = { |
153859be SB |
1603 | #define DEF(option, callback, arg_string) \ |
1604 | { option, callback }, | |
1605 | #include "qemu-img-cmds.h" | |
1606 | #undef DEF | |
1607 | #undef GEN_DOCS | |
1608 | { NULL, NULL, }, | |
1609 | }; | |
1610 | ||
ea2384d3 FB |
1611 | int main(int argc, char **argv) |
1612 | { | |
c227f099 | 1613 | const img_cmd_t *cmd; |
153859be | 1614 | const char *cmdname; |
ea2384d3 | 1615 | |
53f76e58 KW |
1616 | error_set_progname(argv[0]); |
1617 | ||
ea2384d3 FB |
1618 | bdrv_init(); |
1619 | if (argc < 2) | |
1620 | help(); | |
153859be | 1621 | cmdname = argv[1]; |
8f9b157e | 1622 | argc--; argv++; |
153859be SB |
1623 | |
1624 | /* find the command */ | |
1625 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { | |
1626 | if (!strcmp(cmdname, cmd->name)) { | |
1627 | return cmd->handler(argc, argv); | |
1628 | } | |
ea2384d3 | 1629 | } |
153859be SB |
1630 | |
1631 | /* not found */ | |
1632 | help(); | |
ea2384d3 FB |
1633 | return 0; |
1634 | } |