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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 | |
8b7968f7 | 42 | static void GCC_FMT_ATTR(1, 2) 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 | ||
e076f338 KW |
428 | /* |
429 | * Checks an image for consistency. Exit codes: | |
430 | * | |
431 | * 0 - Check completed, image is good | |
432 | * 1 - Check not completed because of internal errors | |
433 | * 2 - Check completed, image is corrupted | |
434 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
435 | */ | |
1585969c AL |
436 | static int img_check(int argc, char **argv) |
437 | { | |
438 | int c, ret; | |
439 | const char *filename, *fmt; | |
1585969c | 440 | BlockDriverState *bs; |
e076f338 | 441 | BdrvCheckResult result; |
1585969c AL |
442 | |
443 | fmt = NULL; | |
444 | for(;;) { | |
445 | c = getopt(argc, argv, "f:h"); | |
446 | if (c == -1) | |
447 | break; | |
448 | switch(c) { | |
449 | case 'h': | |
450 | help(); | |
451 | break; | |
452 | case 'f': | |
453 | fmt = optarg; | |
454 | break; | |
455 | } | |
456 | } | |
457 | if (optind >= argc) | |
458 | help(); | |
459 | filename = argv[optind++]; | |
460 | ||
adfe078e | 461 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
c2abccec MK |
462 | if (!bs) { |
463 | return 1; | |
464 | } | |
e076f338 KW |
465 | ret = bdrv_check(bs, &result); |
466 | ||
467 | if (ret == -ENOTSUP) { | |
1585969c | 468 | error("This image format does not support checks"); |
e076f338 KW |
469 | bdrv_delete(bs); |
470 | return 1; | |
471 | } | |
472 | ||
473 | if (!(result.corruptions || result.leaks || result.check_errors)) { | |
474 | printf("No errors were found on the image.\n"); | |
475 | } else { | |
476 | if (result.corruptions) { | |
477 | printf("\n%d errors were found on the image.\n" | |
478 | "Data may be corrupted, or further writes to the image " | |
479 | "may corrupt it.\n", | |
480 | result.corruptions); | |
481 | } | |
482 | ||
483 | if (result.leaks) { | |
484 | printf("\n%d leaked clusters were found on the image.\n" | |
485 | "This means waste of disk space, but no harm to data.\n", | |
486 | result.leaks); | |
487 | } | |
488 | ||
489 | if (result.check_errors) { | |
490 | printf("\n%d internal errors have occurred during the check.\n", | |
491 | result.check_errors); | |
1585969c | 492 | } |
1585969c AL |
493 | } |
494 | ||
495 | bdrv_delete(bs); | |
e076f338 KW |
496 | |
497 | if (ret < 0 || result.check_errors) { | |
498 | printf("\nAn error has occurred during the check: %s\n" | |
499 | "The check is not complete and may have missed error.\n", | |
500 | strerror(-ret)); | |
c2abccec MK |
501 | return 1; |
502 | } | |
e076f338 KW |
503 | |
504 | if (result.corruptions) { | |
505 | return 2; | |
506 | } else if (result.leaks) { | |
507 | return 3; | |
508 | } else { | |
509 | return 0; | |
510 | } | |
1585969c AL |
511 | } |
512 | ||
ea2384d3 FB |
513 | static int img_commit(int argc, char **argv) |
514 | { | |
515 | int c, ret; | |
516 | const char *filename, *fmt; | |
ea2384d3 FB |
517 | BlockDriverState *bs; |
518 | ||
519 | fmt = NULL; | |
520 | for(;;) { | |
521 | c = getopt(argc, argv, "f:h"); | |
522 | if (c == -1) | |
523 | break; | |
524 | switch(c) { | |
525 | case 'h': | |
526 | help(); | |
527 | break; | |
528 | case 'f': | |
529 | fmt = optarg; | |
530 | break; | |
531 | } | |
532 | } | |
5fafdf24 | 533 | if (optind >= argc) |
ea2384d3 FB |
534 | help(); |
535 | filename = argv[optind++]; | |
536 | ||
adfe078e | 537 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
c2abccec MK |
538 | if (!bs) { |
539 | return 1; | |
540 | } | |
ea2384d3 FB |
541 | ret = bdrv_commit(bs); |
542 | switch(ret) { | |
543 | case 0: | |
544 | printf("Image committed.\n"); | |
545 | break; | |
546 | case -ENOENT: | |
547 | error("No disk inserted"); | |
548 | break; | |
549 | case -EACCES: | |
550 | error("Image is read-only"); | |
551 | break; | |
552 | case -ENOTSUP: | |
553 | error("Image is already committed"); | |
554 | break; | |
555 | default: | |
556 | error("Error while committing image"); | |
557 | break; | |
558 | } | |
559 | ||
560 | bdrv_delete(bs); | |
c2abccec MK |
561 | if (ret) { |
562 | return 1; | |
563 | } | |
ea2384d3 FB |
564 | return 0; |
565 | } | |
566 | ||
567 | static int is_not_zero(const uint8_t *sector, int len) | |
568 | { | |
569 | int i; | |
570 | len >>= 2; | |
571 | for(i = 0;i < len; i++) { | |
572 | if (((uint32_t *)sector)[i] != 0) | |
573 | return 1; | |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
f58c7b35 TS |
578 | /* |
579 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
580 | * a non-NUL byte. | |
581 | * | |
582 | * 'pnum' is set to the number of sectors (including and immediately following | |
583 | * the first one) that are known to be in the same allocated/unallocated state. | |
584 | */ | |
ea2384d3 FB |
585 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
586 | { | |
587 | int v, i; | |
588 | ||
589 | if (n <= 0) { | |
590 | *pnum = 0; | |
591 | return 0; | |
592 | } | |
593 | v = is_not_zero(buf, 512); | |
594 | for(i = 1; i < n; i++) { | |
595 | buf += 512; | |
596 | if (v != is_not_zero(buf, 512)) | |
597 | break; | |
598 | } | |
599 | *pnum = i; | |
600 | return v; | |
601 | } | |
602 | ||
3e85c6fd KW |
603 | /* |
604 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
605 | * buffers matches, non-zero otherwise. | |
606 | * | |
607 | * pnum is set to the number of sectors (including and immediately following | |
608 | * the first one) that are known to have the same comparison result | |
609 | */ | |
610 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
611 | int *pnum) | |
612 | { | |
613 | int res, i; | |
614 | ||
615 | if (n <= 0) { | |
616 | *pnum = 0; | |
617 | return 0; | |
618 | } | |
619 | ||
620 | res = !!memcmp(buf1, buf2, 512); | |
621 | for(i = 1; i < n; i++) { | |
622 | buf1 += 512; | |
623 | buf2 += 512; | |
624 | ||
625 | if (!!memcmp(buf1, buf2, 512) != res) { | |
626 | break; | |
627 | } | |
628 | } | |
629 | ||
630 | *pnum = i; | |
631 | return res; | |
632 | } | |
633 | ||
80ee15a6 | 634 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
ea2384d3 FB |
635 | |
636 | static int img_convert(int argc, char **argv) | |
637 | { | |
c2abccec | 638 | int c, ret = 0, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors; |
f58c7b35 | 639 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
b50cbabc | 640 | BlockDriver *drv, *proto_drv; |
c2abccec | 641 | BlockDriverState **bs = NULL, *out_bs = NULL; |
96b8f136 TS |
642 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
643 | uint64_t bs_sectors; | |
c2abccec | 644 | uint8_t * buf = NULL; |
ea2384d3 | 645 | const uint8_t *buf1; |
faea38e7 | 646 | BlockDriverInfo bdi; |
b50cbabc | 647 | QEMUOptionParameter *param = NULL, *create_options = NULL; |
a18953fb | 648 | QEMUOptionParameter *out_baseimg_param; |
efa84d43 | 649 | char *options = NULL; |
51ef6727 | 650 | const char *snapshot_name = NULL; |
ea2384d3 FB |
651 | |
652 | fmt = NULL; | |
653 | out_fmt = "raw"; | |
f58c7b35 | 654 | out_baseimg = NULL; |
ec36ba14 | 655 | flags = 0; |
ea2384d3 | 656 | for(;;) { |
51ef6727 | 657 | c = getopt(argc, argv, "f:O:B:s:hce6o:"); |
ea2384d3 FB |
658 | if (c == -1) |
659 | break; | |
660 | switch(c) { | |
661 | case 'h': | |
662 | help(); | |
663 | break; | |
664 | case 'f': | |
665 | fmt = optarg; | |
666 | break; | |
667 | case 'O': | |
668 | out_fmt = optarg; | |
669 | break; | |
f58c7b35 TS |
670 | case 'B': |
671 | out_baseimg = optarg; | |
672 | break; | |
ea2384d3 | 673 | case 'c': |
ec36ba14 | 674 | flags |= BLOCK_FLAG_COMPRESS; |
ea2384d3 FB |
675 | break; |
676 | case 'e': | |
ec36ba14 TS |
677 | flags |= BLOCK_FLAG_ENCRYPT; |
678 | break; | |
679 | case '6': | |
680 | flags |= BLOCK_FLAG_COMPAT6; | |
ea2384d3 | 681 | break; |
efa84d43 KW |
682 | case 'o': |
683 | options = optarg; | |
684 | break; | |
51ef6727 | 685 | case 's': |
686 | snapshot_name = optarg; | |
687 | break; | |
ea2384d3 FB |
688 | } |
689 | } | |
3b46e624 | 690 | |
926c2d23 AZ |
691 | bs_n = argc - optind - 1; |
692 | if (bs_n < 1) help(); | |
693 | ||
694 | out_filename = argv[argc - 1]; | |
f58c7b35 | 695 | |
c2abccec | 696 | if (bs_n > 1 && out_baseimg) { |
f58c7b35 | 697 | error("-B makes no sense when concatenating multiple input images"); |
c2abccec MK |
698 | return 1; |
699 | } | |
926c2d23 AZ |
700 | |
701 | bs = calloc(bs_n, sizeof(BlockDriverState *)); | |
c2abccec | 702 | if (!bs) { |
926c2d23 | 703 | error("Out of memory"); |
c2abccec MK |
704 | return 1; |
705 | } | |
926c2d23 AZ |
706 | |
707 | total_sectors = 0; | |
708 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
adfe078e | 709 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
c2abccec | 710 | if (!bs[bs_i]) { |
926c2d23 | 711 | error("Could not open '%s'", argv[optind + bs_i]); |
c2abccec MK |
712 | ret = -1; |
713 | goto out; | |
714 | } | |
926c2d23 AZ |
715 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
716 | total_sectors += bs_sectors; | |
717 | } | |
ea2384d3 | 718 | |
51ef6727 | 719 | if (snapshot_name != NULL) { |
720 | if (bs_n > 1) { | |
721 | error("No support for concatenating multiple snapshot\n"); | |
722 | ret = -1; | |
723 | goto out; | |
724 | } | |
725 | if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { | |
726 | error("Failed to load snapshot\n"); | |
727 | ret = -1; | |
728 | goto out; | |
729 | } | |
730 | } | |
731 | ||
efa84d43 | 732 | /* Find driver and parse its options */ |
ea2384d3 | 733 | drv = bdrv_find_format(out_fmt); |
c2abccec | 734 | if (!drv) { |
d34dda5e | 735 | error("Unknown file format '%s'", out_fmt); |
c2abccec MK |
736 | ret = -1; |
737 | goto out; | |
738 | } | |
efa84d43 | 739 | |
b50cbabc | 740 | proto_drv = bdrv_find_protocol(out_filename); |
c2abccec | 741 | if (!proto_drv) { |
b50cbabc | 742 | error("Unknown protocol '%s'", out_filename); |
c2abccec MK |
743 | ret = -1; |
744 | goto out; | |
745 | } | |
b50cbabc MK |
746 | |
747 | create_options = append_option_parameters(create_options, | |
748 | drv->create_options); | |
749 | create_options = append_option_parameters(create_options, | |
750 | proto_drv->create_options); | |
db08adf5 | 751 | if (options && !strcmp(options, "?")) { |
b50cbabc | 752 | print_option_help(create_options); |
c2abccec | 753 | goto out; |
db08adf5 KW |
754 | } |
755 | ||
efa84d43 | 756 | if (options) { |
b50cbabc | 757 | param = parse_option_parameters(options, create_options, param); |
efa84d43 KW |
758 | if (param == NULL) { |
759 | error("Invalid options for file format '%s'.", out_fmt); | |
c2abccec MK |
760 | ret = -1; |
761 | goto out; | |
efa84d43 KW |
762 | } |
763 | } else { | |
b50cbabc | 764 | param = parse_option_parameters("", create_options, param); |
efa84d43 KW |
765 | } |
766 | ||
767 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); | |
c2abccec MK |
768 | ret = add_old_style_options(out_fmt, param, flags, out_baseimg, NULL); |
769 | if (ret < 0) { | |
770 | goto out; | |
771 | } | |
efa84d43 | 772 | |
a18953fb KW |
773 | /* Get backing file name if -o backing_file was used */ |
774 | out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); | |
775 | if (out_baseimg_param) { | |
776 | out_baseimg = out_baseimg_param->value.s; | |
777 | } | |
778 | ||
efa84d43 KW |
779 | /* Check if compression is supported */ |
780 | if (flags & BLOCK_FLAG_COMPRESS) { | |
781 | QEMUOptionParameter *encryption = | |
782 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); | |
783 | ||
784 | if (!drv->bdrv_write_compressed) { | |
785 | error("Compression not supported for this file format"); | |
c2abccec MK |
786 | ret = -1; |
787 | goto out; | |
efa84d43 KW |
788 | } |
789 | ||
790 | if (encryption && encryption->value.n) { | |
791 | error("Compression and encryption not supported at the same time"); | |
c2abccec MK |
792 | ret = -1; |
793 | goto out; | |
efa84d43 KW |
794 | } |
795 | } | |
796 | ||
797 | /* Create the new image */ | |
798 | ret = bdrv_create(drv, out_filename, param); | |
ea2384d3 FB |
799 | if (ret < 0) { |
800 | if (ret == -ENOTSUP) { | |
93c65b47 | 801 | error("Formatting not supported for file format '%s'", out_fmt); |
6e9ea0c0 AJ |
802 | } else if (ret == -EFBIG) { |
803 | error("The image size is too large for file format '%s'", out_fmt); | |
ea2384d3 | 804 | } else { |
3e7896de | 805 | error("%s: error while converting %s: %s", out_filename, out_fmt, strerror(-ret)); |
ea2384d3 | 806 | } |
c2abccec | 807 | goto out; |
ea2384d3 | 808 | } |
3b46e624 | 809 | |
1bd8e175 KW |
810 | out_bs = bdrv_new_open(out_filename, out_fmt, |
811 | BDRV_O_FLAGS | BDRV_O_RDWR | BDRV_O_NO_FLUSH); | |
c2abccec MK |
812 | if (!out_bs) { |
813 | ret = -1; | |
814 | goto out; | |
815 | } | |
ea2384d3 | 816 | |
926c2d23 AZ |
817 | bs_i = 0; |
818 | bs_offset = 0; | |
819 | bdrv_get_geometry(bs[0], &bs_sectors); | |
d6771bfa | 820 | buf = qemu_malloc(IO_BUF_SIZE); |
926c2d23 AZ |
821 | |
822 | if (flags & BLOCK_FLAG_COMPRESS) { | |
c2abccec MK |
823 | ret = bdrv_get_info(out_bs, &bdi); |
824 | if (ret < 0) { | |
faea38e7 | 825 | error("could not get block driver info"); |
c2abccec MK |
826 | goto out; |
827 | } | |
faea38e7 | 828 | cluster_size = bdi.cluster_size; |
c2abccec | 829 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
ea2384d3 | 830 | error("invalid cluster size"); |
c2abccec MK |
831 | ret = -1; |
832 | goto out; | |
833 | } | |
ea2384d3 FB |
834 | cluster_sectors = cluster_size >> 9; |
835 | sector_num = 0; | |
836 | for(;;) { | |
926c2d23 AZ |
837 | int64_t bs_num; |
838 | int remainder; | |
839 | uint8_t *buf2; | |
840 | ||
ea2384d3 FB |
841 | nb_sectors = total_sectors - sector_num; |
842 | if (nb_sectors <= 0) | |
843 | break; | |
844 | if (nb_sectors >= cluster_sectors) | |
845 | n = cluster_sectors; | |
846 | else | |
847 | n = nb_sectors; | |
926c2d23 AZ |
848 | |
849 | bs_num = sector_num - bs_offset; | |
850 | assert (bs_num >= 0); | |
851 | remainder = n; | |
852 | buf2 = buf; | |
853 | while (remainder > 0) { | |
854 | int nlow; | |
855 | while (bs_num == bs_sectors) { | |
856 | bs_i++; | |
857 | assert (bs_i < bs_n); | |
858 | bs_offset += bs_sectors; | |
859 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
860 | bs_num = 0; | |
0bfcd599 BS |
861 | /* printf("changing part: sector_num=%" PRId64 ", " |
862 | "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 | |
863 | "\n", sector_num, bs_i, bs_offset, bs_sectors); */ | |
926c2d23 AZ |
864 | } |
865 | assert (bs_num < bs_sectors); | |
866 | ||
867 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; | |
868 | ||
c2abccec MK |
869 | ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
870 | if (ret < 0) { | |
926c2d23 | 871 | error("error while reading"); |
c2abccec MK |
872 | goto out; |
873 | } | |
926c2d23 AZ |
874 | |
875 | buf2 += nlow * 512; | |
876 | bs_num += nlow; | |
877 | ||
878 | remainder -= nlow; | |
879 | } | |
880 | assert (remainder == 0); | |
881 | ||
ea2384d3 FB |
882 | if (n < cluster_sectors) |
883 | memset(buf + n * 512, 0, cluster_size - n * 512); | |
884 | if (is_not_zero(buf, cluster_size)) { | |
c2abccec MK |
885 | ret = bdrv_write_compressed(out_bs, sector_num, buf, |
886 | cluster_sectors); | |
887 | if (ret != 0) { | |
ec3757de FB |
888 | error("error while compressing sector %" PRId64, |
889 | sector_num); | |
c2abccec MK |
890 | goto out; |
891 | } | |
ea2384d3 FB |
892 | } |
893 | sector_num += n; | |
894 | } | |
faea38e7 FB |
895 | /* signal EOF to align */ |
896 | bdrv_write_compressed(out_bs, 0, NULL, 0); | |
ea2384d3 | 897 | } else { |
f2feebbd KW |
898 | int has_zero_init = bdrv_has_zero_init(out_bs); |
899 | ||
f58c7b35 | 900 | sector_num = 0; // total number of sectors converted so far |
ea2384d3 FB |
901 | for(;;) { |
902 | nb_sectors = total_sectors - sector_num; | |
903 | if (nb_sectors <= 0) | |
904 | break; | |
905 | if (nb_sectors >= (IO_BUF_SIZE / 512)) | |
906 | n = (IO_BUF_SIZE / 512); | |
907 | else | |
908 | n = nb_sectors; | |
926c2d23 AZ |
909 | |
910 | while (sector_num - bs_offset >= bs_sectors) { | |
911 | bs_i ++; | |
912 | assert (bs_i < bs_n); | |
913 | bs_offset += bs_sectors; | |
914 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
0bfcd599 BS |
915 | /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " |
916 | "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", | |
926c2d23 AZ |
917 | sector_num, bs_i, bs_offset, bs_sectors); */ |
918 | } | |
919 | ||
920 | if (n > bs_offset + bs_sectors - sector_num) | |
921 | n = bs_offset + bs_sectors - sector_num; | |
922 | ||
f2feebbd | 923 | if (has_zero_init) { |
d032044f AS |
924 | /* If the output image is being created as a copy on write image, |
925 | assume that sectors which are unallocated in the input image | |
926 | are present in both the output's and input's base images (no | |
927 | need to copy them). */ | |
928 | if (out_baseimg) { | |
929 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, | |
930 | n, &n1)) { | |
931 | sector_num += n1; | |
932 | continue; | |
933 | } | |
934 | /* The next 'n1' sectors are allocated in the input image. Copy | |
935 | only those as they may be followed by unallocated sectors. */ | |
936 | n = n1; | |
93c65b47 | 937 | } |
93c65b47 AL |
938 | } else { |
939 | n1 = n; | |
f58c7b35 TS |
940 | } |
941 | ||
c2abccec MK |
942 | ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
943 | if (ret < 0) { | |
ea2384d3 | 944 | error("error while reading"); |
c2abccec MK |
945 | goto out; |
946 | } | |
ea2384d3 FB |
947 | /* NOTE: at the same time we convert, we do not write zero |
948 | sectors to have a chance to compress the image. Ideally, we | |
949 | should add a specific call to have the info to go faster */ | |
950 | buf1 = buf; | |
951 | while (n > 0) { | |
f58c7b35 TS |
952 | /* If the output image is being created as a copy on write image, |
953 | copy all sectors even the ones containing only NUL bytes, | |
93c65b47 AL |
954 | because they may differ from the sectors in the base image. |
955 | ||
956 | If the output is to a host device, we also write out | |
957 | sectors that are entirely 0, since whatever data was | |
958 | already there is garbage, not 0s. */ | |
f2feebbd | 959 | if (!has_zero_init || out_baseimg || |
93c65b47 | 960 | is_allocated_sectors(buf1, n, &n1)) { |
c2abccec MK |
961 | ret = bdrv_write(out_bs, sector_num, buf1, n1); |
962 | if (ret < 0) { | |
ea2384d3 | 963 | error("error while writing"); |
c2abccec MK |
964 | goto out; |
965 | } | |
ea2384d3 FB |
966 | } |
967 | sector_num += n1; | |
968 | n -= n1; | |
969 | buf1 += n1 * 512; | |
970 | } | |
971 | } | |
972 | } | |
c2abccec MK |
973 | out: |
974 | free_option_parameters(create_options); | |
975 | free_option_parameters(param); | |
d6771bfa | 976 | qemu_free(buf); |
c2abccec MK |
977 | if (out_bs) { |
978 | bdrv_delete(out_bs); | |
979 | } | |
980 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
981 | if (bs[bs_i]) { | |
982 | bdrv_delete(bs[bs_i]); | |
983 | } | |
984 | } | |
926c2d23 | 985 | free(bs); |
c2abccec MK |
986 | if (ret) { |
987 | return 1; | |
988 | } | |
ea2384d3 FB |
989 | return 0; |
990 | } | |
991 | ||
57d1a2b6 FB |
992 | #ifdef _WIN32 |
993 | static int64_t get_allocated_file_size(const char *filename) | |
994 | { | |
e8445331 FB |
995 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
996 | get_compressed_t get_compressed; | |
57d1a2b6 | 997 | struct _stati64 st; |
e8445331 FB |
998 | |
999 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
1000 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); | |
1001 | if (get_compressed) { | |
1002 | DWORD high, low; | |
1003 | low = get_compressed(filename, &high); | |
1004 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) | |
1005 | return (((int64_t) high) << 32) + low; | |
1006 | } | |
1007 | ||
5fafdf24 | 1008 | if (_stati64(filename, &st) < 0) |
57d1a2b6 FB |
1009 | return -1; |
1010 | return st.st_size; | |
1011 | } | |
1012 | #else | |
1013 | static int64_t get_allocated_file_size(const char *filename) | |
1014 | { | |
1015 | struct stat st; | |
5fafdf24 | 1016 | if (stat(filename, &st) < 0) |
57d1a2b6 FB |
1017 | return -1; |
1018 | return (int64_t)st.st_blocks * 512; | |
1019 | } | |
1020 | #endif | |
1021 | ||
faea38e7 FB |
1022 | static void dump_snapshots(BlockDriverState *bs) |
1023 | { | |
1024 | QEMUSnapshotInfo *sn_tab, *sn; | |
1025 | int nb_sns, i; | |
1026 | char buf[256]; | |
1027 | ||
1028 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
1029 | if (nb_sns <= 0) | |
1030 | return; | |
1031 | printf("Snapshot list:\n"); | |
1032 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
1033 | for(i = 0; i < nb_sns; i++) { | |
1034 | sn = &sn_tab[i]; | |
1035 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
1036 | } | |
1037 | qemu_free(sn_tab); | |
1038 | } | |
1039 | ||
ea2384d3 FB |
1040 | static int img_info(int argc, char **argv) |
1041 | { | |
1042 | int c; | |
1043 | const char *filename, *fmt; | |
ea2384d3 FB |
1044 | BlockDriverState *bs; |
1045 | char fmt_name[128], size_buf[128], dsize_buf[128]; | |
96b8f136 TS |
1046 | uint64_t total_sectors; |
1047 | int64_t allocated_size; | |
93b6b2a3 FB |
1048 | char backing_filename[1024]; |
1049 | char backing_filename2[1024]; | |
faea38e7 | 1050 | BlockDriverInfo bdi; |
ea2384d3 FB |
1051 | |
1052 | fmt = NULL; | |
1053 | for(;;) { | |
1054 | c = getopt(argc, argv, "f:h"); | |
1055 | if (c == -1) | |
1056 | break; | |
1057 | switch(c) { | |
1058 | case 'h': | |
1059 | help(); | |
1060 | break; | |
1061 | case 'f': | |
1062 | fmt = optarg; | |
1063 | break; | |
1064 | } | |
1065 | } | |
5fafdf24 | 1066 | if (optind >= argc) |
ea2384d3 FB |
1067 | help(); |
1068 | filename = argv[optind++]; | |
1069 | ||
adfe078e | 1070 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
c2abccec MK |
1071 | if (!bs) { |
1072 | return 1; | |
1073 | } | |
ea2384d3 FB |
1074 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
1075 | bdrv_get_geometry(bs, &total_sectors); | |
1076 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); | |
57d1a2b6 FB |
1077 | allocated_size = get_allocated_file_size(filename); |
1078 | if (allocated_size < 0) | |
a10ea30b | 1079 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
de167e41 | 1080 | else |
5fafdf24 | 1081 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
de167e41 | 1082 | allocated_size); |
ea2384d3 FB |
1083 | printf("image: %s\n" |
1084 | "file format: %s\n" | |
ec3757de | 1085 | "virtual size: %s (%" PRId64 " bytes)\n" |
ea2384d3 | 1086 | "disk size: %s\n", |
5fafdf24 | 1087 | filename, fmt_name, size_buf, |
ec3757de | 1088 | (total_sectors * 512), |
ea2384d3 FB |
1089 | dsize_buf); |
1090 | if (bdrv_is_encrypted(bs)) | |
1091 | printf("encrypted: yes\n"); | |
faea38e7 | 1092 | if (bdrv_get_info(bs, &bdi) >= 0) { |
5fafdf24 | 1093 | if (bdi.cluster_size != 0) |
faea38e7 FB |
1094 | printf("cluster_size: %d\n", bdi.cluster_size); |
1095 | } | |
93b6b2a3 | 1096 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
faea38e7 | 1097 | if (backing_filename[0] != '\0') { |
93b6b2a3 FB |
1098 | path_combine(backing_filename2, sizeof(backing_filename2), |
1099 | filename, backing_filename); | |
5fafdf24 | 1100 | printf("backing file: %s (actual path: %s)\n", |
93b6b2a3 FB |
1101 | backing_filename, |
1102 | backing_filename2); | |
faea38e7 FB |
1103 | } |
1104 | dump_snapshots(bs); | |
ea2384d3 FB |
1105 | bdrv_delete(bs); |
1106 | return 0; | |
1107 | } | |
1108 | ||
f7b4a940 AL |
1109 | #define SNAPSHOT_LIST 1 |
1110 | #define SNAPSHOT_CREATE 2 | |
1111 | #define SNAPSHOT_APPLY 3 | |
1112 | #define SNAPSHOT_DELETE 4 | |
1113 | ||
153859be | 1114 | static int img_snapshot(int argc, char **argv) |
f7b4a940 AL |
1115 | { |
1116 | BlockDriverState *bs; | |
1117 | QEMUSnapshotInfo sn; | |
1118 | char *filename, *snapshot_name = NULL; | |
c2abccec | 1119 | int c, ret = 0, bdrv_oflags; |
f7b4a940 AL |
1120 | int action = 0; |
1121 | qemu_timeval tv; | |
1122 | ||
f5edb014 | 1123 | bdrv_oflags = BDRV_O_RDWR; |
f7b4a940 AL |
1124 | /* Parse commandline parameters */ |
1125 | for(;;) { | |
1126 | c = getopt(argc, argv, "la:c:d:h"); | |
1127 | if (c == -1) | |
1128 | break; | |
1129 | switch(c) { | |
1130 | case 'h': | |
1131 | help(); | |
153859be | 1132 | return 0; |
f7b4a940 AL |
1133 | case 'l': |
1134 | if (action) { | |
1135 | help(); | |
153859be | 1136 | return 0; |
f7b4a940 AL |
1137 | } |
1138 | action = SNAPSHOT_LIST; | |
f5edb014 | 1139 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
f7b4a940 AL |
1140 | break; |
1141 | case 'a': | |
1142 | if (action) { | |
1143 | help(); | |
153859be | 1144 | return 0; |
f7b4a940 AL |
1145 | } |
1146 | action = SNAPSHOT_APPLY; | |
1147 | snapshot_name = optarg; | |
1148 | break; | |
1149 | case 'c': | |
1150 | if (action) { | |
1151 | help(); | |
153859be | 1152 | return 0; |
f7b4a940 AL |
1153 | } |
1154 | action = SNAPSHOT_CREATE; | |
1155 | snapshot_name = optarg; | |
1156 | break; | |
1157 | case 'd': | |
1158 | if (action) { | |
1159 | help(); | |
153859be | 1160 | return 0; |
f7b4a940 AL |
1161 | } |
1162 | action = SNAPSHOT_DELETE; | |
1163 | snapshot_name = optarg; | |
1164 | break; | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | if (optind >= argc) | |
1169 | help(); | |
1170 | filename = argv[optind++]; | |
1171 | ||
1172 | /* Open the image */ | |
f163d073 | 1173 | bs = bdrv_new_open(filename, NULL, bdrv_oflags); |
c2abccec MK |
1174 | if (!bs) { |
1175 | return 1; | |
1176 | } | |
f7b4a940 AL |
1177 | |
1178 | /* Perform the requested action */ | |
1179 | switch(action) { | |
1180 | case SNAPSHOT_LIST: | |
1181 | dump_snapshots(bs); | |
1182 | break; | |
1183 | ||
1184 | case SNAPSHOT_CREATE: | |
1185 | memset(&sn, 0, sizeof(sn)); | |
1186 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
1187 | ||
1188 | qemu_gettimeofday(&tv); | |
1189 | sn.date_sec = tv.tv_sec; | |
1190 | sn.date_nsec = tv.tv_usec * 1000; | |
1191 | ||
1192 | ret = bdrv_snapshot_create(bs, &sn); | |
1193 | if (ret) | |
1194 | error("Could not create snapshot '%s': %d (%s)", | |
1195 | snapshot_name, ret, strerror(-ret)); | |
1196 | break; | |
1197 | ||
1198 | case SNAPSHOT_APPLY: | |
1199 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
1200 | if (ret) | |
1201 | error("Could not apply snapshot '%s': %d (%s)", | |
1202 | snapshot_name, ret, strerror(-ret)); | |
1203 | break; | |
1204 | ||
1205 | case SNAPSHOT_DELETE: | |
1206 | ret = bdrv_snapshot_delete(bs, snapshot_name); | |
1207 | if (ret) | |
1208 | error("Could not delete snapshot '%s': %d (%s)", | |
1209 | snapshot_name, ret, strerror(-ret)); | |
1210 | break; | |
1211 | } | |
1212 | ||
1213 | /* Cleanup */ | |
1214 | bdrv_delete(bs); | |
c2abccec MK |
1215 | if (ret) { |
1216 | return 1; | |
1217 | } | |
153859be | 1218 | return 0; |
f7b4a940 AL |
1219 | } |
1220 | ||
3e85c6fd KW |
1221 | static int img_rebase(int argc, char **argv) |
1222 | { | |
c2abccec | 1223 | BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
f163d073 | 1224 | BlockDriver *old_backing_drv, *new_backing_drv; |
3e85c6fd | 1225 | char *filename; |
e53dbee0 | 1226 | const char *fmt, *out_basefmt, *out_baseimg; |
3e85c6fd KW |
1227 | int c, flags, ret; |
1228 | int unsafe = 0; | |
1229 | ||
1230 | /* Parse commandline parameters */ | |
e53dbee0 | 1231 | fmt = NULL; |
3e85c6fd KW |
1232 | out_baseimg = NULL; |
1233 | out_basefmt = NULL; | |
1234 | ||
1235 | for(;;) { | |
e53dbee0 | 1236 | c = getopt(argc, argv, "uhf:F:b:"); |
3e85c6fd KW |
1237 | if (c == -1) |
1238 | break; | |
1239 | switch(c) { | |
1240 | case 'h': | |
1241 | help(); | |
1242 | return 0; | |
e53dbee0 KW |
1243 | case 'f': |
1244 | fmt = optarg; | |
1245 | break; | |
3e85c6fd KW |
1246 | case 'F': |
1247 | out_basefmt = optarg; | |
1248 | break; | |
1249 | case 'b': | |
1250 | out_baseimg = optarg; | |
1251 | break; | |
1252 | case 'u': | |
1253 | unsafe = 1; | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | if ((optind >= argc) || !out_baseimg) | |
1259 | help(); | |
1260 | filename = argv[optind++]; | |
1261 | ||
1262 | /* | |
1263 | * Open the images. | |
1264 | * | |
1265 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
1266 | * the reference to a renamed or moved backing file. | |
1267 | */ | |
adfe078e | 1268 | flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
f163d073 | 1269 | bs = bdrv_new_open(filename, fmt, flags); |
c2abccec MK |
1270 | if (!bs) { |
1271 | return 1; | |
1272 | } | |
3e85c6fd KW |
1273 | |
1274 | /* Find the right drivers for the backing files */ | |
1275 | old_backing_drv = NULL; | |
1276 | new_backing_drv = NULL; | |
1277 | ||
1278 | if (!unsafe && bs->backing_format[0] != '\0') { | |
1279 | old_backing_drv = bdrv_find_format(bs->backing_format); | |
1280 | if (old_backing_drv == NULL) { | |
1281 | error("Invalid format name: '%s'", bs->backing_format); | |
c2abccec MK |
1282 | ret = -1; |
1283 | goto out; | |
3e85c6fd KW |
1284 | } |
1285 | } | |
1286 | ||
1287 | if (out_basefmt != NULL) { | |
1288 | new_backing_drv = bdrv_find_format(out_basefmt); | |
1289 | if (new_backing_drv == NULL) { | |
1290 | error("Invalid format name: '%s'", out_basefmt); | |
c2abccec MK |
1291 | ret = -1; |
1292 | goto out; | |
3e85c6fd KW |
1293 | } |
1294 | } | |
1295 | ||
1296 | /* For safe rebasing we need to compare old and new backing file */ | |
1297 | if (unsafe) { | |
1298 | /* Make the compiler happy */ | |
1299 | bs_old_backing = NULL; | |
1300 | bs_new_backing = NULL; | |
1301 | } else { | |
1302 | char backing_name[1024]; | |
1303 | ||
1304 | bs_old_backing = bdrv_new("old_backing"); | |
1305 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
c2abccec MK |
1306 | ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1307 | old_backing_drv); | |
1308 | if (ret) { | |
3e85c6fd | 1309 | error("Could not open old backing file '%s'", backing_name); |
c2abccec | 1310 | goto out; |
3e85c6fd KW |
1311 | } |
1312 | ||
1313 | bs_new_backing = bdrv_new("new_backing"); | |
cdbae851 | 1314 | ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
c2abccec MK |
1315 | new_backing_drv); |
1316 | if (ret) { | |
584771e6 | 1317 | error("Could not open new backing file '%s'", out_baseimg); |
c2abccec | 1318 | goto out; |
3e85c6fd KW |
1319 | } |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
1324 | * accesses go to the backing file. We must therefore compare this cluster | |
1325 | * in the old and new backing file, and if they differ we need to copy it | |
1326 | * from the old backing file into the COW file. | |
1327 | * | |
1328 | * If qemu-img crashes during this step, no harm is done. The content of | |
1329 | * the image is the same as the original one at any time. | |
1330 | */ | |
1331 | if (!unsafe) { | |
1332 | uint64_t num_sectors; | |
1333 | uint64_t sector; | |
cc60e327 | 1334 | int n; |
d6771bfa T |
1335 | uint8_t * buf_old; |
1336 | uint8_t * buf_new; | |
1337 | ||
1338 | buf_old = qemu_malloc(IO_BUF_SIZE); | |
1339 | buf_new = qemu_malloc(IO_BUF_SIZE); | |
3e85c6fd KW |
1340 | |
1341 | bdrv_get_geometry(bs, &num_sectors); | |
1342 | ||
1343 | for (sector = 0; sector < num_sectors; sector += n) { | |
1344 | ||
1345 | /* How many sectors can we handle with the next read? */ | |
1346 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
1347 | n = (IO_BUF_SIZE / 512); | |
1348 | } else { | |
1349 | n = num_sectors - sector; | |
1350 | } | |
1351 | ||
1352 | /* If the cluster is allocated, we don't need to take action */ | |
cc60e327 KW |
1353 | ret = bdrv_is_allocated(bs, sector, n, &n); |
1354 | if (ret) { | |
3e85c6fd KW |
1355 | continue; |
1356 | } | |
1357 | ||
1358 | /* Read old and new backing file */ | |
c2abccec MK |
1359 | ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1360 | if (ret < 0) { | |
3e85c6fd | 1361 | error("error while reading from old backing file"); |
c2abccec | 1362 | goto out; |
3e85c6fd | 1363 | } |
c2abccec MK |
1364 | ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1365 | if (ret < 0) { | |
3e85c6fd | 1366 | error("error while reading from new backing file"); |
c2abccec | 1367 | goto out; |
3e85c6fd KW |
1368 | } |
1369 | ||
1370 | /* If they differ, we need to write to the COW file */ | |
1371 | uint64_t written = 0; | |
1372 | ||
1373 | while (written < n) { | |
1374 | int pnum; | |
1375 | ||
1376 | if (compare_sectors(buf_old + written * 512, | |
60b1bd4f | 1377 | buf_new + written * 512, n - written, &pnum)) |
3e85c6fd KW |
1378 | { |
1379 | ret = bdrv_write(bs, sector + written, | |
1380 | buf_old + written * 512, pnum); | |
1381 | if (ret < 0) { | |
1382 | error("Error while writing to COW image: %s", | |
1383 | strerror(-ret)); | |
c2abccec | 1384 | goto out; |
3e85c6fd KW |
1385 | } |
1386 | } | |
1387 | ||
1388 | written += pnum; | |
1389 | } | |
1390 | } | |
d6771bfa T |
1391 | |
1392 | qemu_free(buf_old); | |
1393 | qemu_free(buf_new); | |
3e85c6fd KW |
1394 | } |
1395 | ||
1396 | /* | |
1397 | * Change the backing file. All clusters that are different from the old | |
1398 | * backing file are overwritten in the COW file now, so the visible content | |
1399 | * doesn't change when we switch the backing file. | |
1400 | */ | |
1401 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
1402 | if (ret == -ENOSPC) { | |
1403 | error("Could not change the backing file to '%s': No space left in " | |
1404 | "the file header", out_baseimg); | |
1405 | } else if (ret < 0) { | |
1406 | error("Could not change the backing file to '%s': %s", | |
1407 | out_baseimg, strerror(-ret)); | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * TODO At this point it is possible to check if any clusters that are | |
1412 | * allocated in the COW file are the same in the backing file. If so, they | |
1413 | * could be dropped from the COW file. Don't do this before switching the | |
1414 | * backing file, in case of a crash this would lead to corruption. | |
1415 | */ | |
c2abccec | 1416 | out: |
3e85c6fd KW |
1417 | /* Cleanup */ |
1418 | if (!unsafe) { | |
1419 | bdrv_delete(bs_old_backing); | |
1420 | bdrv_delete(bs_new_backing); | |
1421 | } | |
1422 | ||
1423 | bdrv_delete(bs); | |
c2abccec MK |
1424 | if (ret) { |
1425 | return 1; | |
1426 | } | |
3e85c6fd KW |
1427 | return 0; |
1428 | } | |
1429 | ||
ae6b0ed6 SH |
1430 | static int img_resize(int argc, char **argv) |
1431 | { | |
1432 | int c, ret, relative; | |
1433 | const char *filename, *fmt, *size; | |
1434 | int64_t n, total_size; | |
1435 | BlockDriverState *bs; | |
1436 | QEMUOptionParameter *param; | |
1437 | QEMUOptionParameter resize_options[] = { | |
1438 | { | |
1439 | .name = BLOCK_OPT_SIZE, | |
1440 | .type = OPT_SIZE, | |
1441 | .help = "Virtual disk size" | |
1442 | }, | |
1443 | { NULL } | |
1444 | }; | |
1445 | ||
1446 | fmt = NULL; | |
1447 | for(;;) { | |
1448 | c = getopt(argc, argv, "f:h"); | |
1449 | if (c == -1) { | |
1450 | break; | |
1451 | } | |
1452 | switch(c) { | |
1453 | case 'h': | |
1454 | help(); | |
1455 | break; | |
1456 | case 'f': | |
1457 | fmt = optarg; | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | if (optind + 1 >= argc) { | |
1462 | help(); | |
1463 | } | |
1464 | filename = argv[optind++]; | |
1465 | size = argv[optind++]; | |
1466 | ||
1467 | /* Choose grow, shrink, or absolute resize mode */ | |
1468 | switch (size[0]) { | |
1469 | case '+': | |
1470 | relative = 1; | |
1471 | size++; | |
1472 | break; | |
1473 | case '-': | |
1474 | relative = -1; | |
1475 | size++; | |
1476 | break; | |
1477 | default: | |
1478 | relative = 0; | |
1479 | break; | |
1480 | } | |
1481 | ||
1482 | /* Parse size */ | |
1483 | param = parse_option_parameters("", resize_options, NULL); | |
1484 | if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) { | |
1485 | /* Error message already printed when size parsing fails */ | |
1486 | exit(1); | |
1487 | } | |
1488 | n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; | |
1489 | free_option_parameters(param); | |
1490 | ||
1491 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); | |
c2abccec MK |
1492 | if (!bs) { |
1493 | return 1; | |
1494 | } | |
ae6b0ed6 SH |
1495 | |
1496 | if (relative) { | |
1497 | total_size = bdrv_getlength(bs) + n * relative; | |
1498 | } else { | |
1499 | total_size = n; | |
1500 | } | |
1501 | if (total_size <= 0) { | |
1502 | error("New image size must be positive"); | |
c2abccec MK |
1503 | ret = -1; |
1504 | goto out; | |
ae6b0ed6 SH |
1505 | } |
1506 | ||
1507 | ret = bdrv_truncate(bs, total_size); | |
1508 | switch (ret) { | |
1509 | case 0: | |
1510 | printf("Image resized.\n"); | |
1511 | break; | |
1512 | case -ENOTSUP: | |
1513 | error("This image format does not support resize"); | |
1514 | break; | |
1515 | case -EACCES: | |
1516 | error("Image is read-only"); | |
1517 | break; | |
1518 | default: | |
1519 | error("Error resizing image (%d)", -ret); | |
1520 | break; | |
1521 | } | |
c2abccec | 1522 | out: |
ae6b0ed6 | 1523 | bdrv_delete(bs); |
c2abccec MK |
1524 | if (ret) { |
1525 | return 1; | |
1526 | } | |
ae6b0ed6 SH |
1527 | return 0; |
1528 | } | |
1529 | ||
c227f099 | 1530 | static const img_cmd_t img_cmds[] = { |
153859be SB |
1531 | #define DEF(option, callback, arg_string) \ |
1532 | { option, callback }, | |
1533 | #include "qemu-img-cmds.h" | |
1534 | #undef DEF | |
1535 | #undef GEN_DOCS | |
1536 | { NULL, NULL, }, | |
1537 | }; | |
1538 | ||
ea2384d3 FB |
1539 | int main(int argc, char **argv) |
1540 | { | |
c227f099 | 1541 | const img_cmd_t *cmd; |
153859be | 1542 | const char *cmdname; |
ea2384d3 FB |
1543 | |
1544 | bdrv_init(); | |
1545 | if (argc < 2) | |
1546 | help(); | |
153859be | 1547 | cmdname = argv[1]; |
8f9b157e | 1548 | argc--; argv++; |
153859be SB |
1549 | |
1550 | /* find the command */ | |
1551 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { | |
1552 | if (!strcmp(cmdname, cmd->name)) { | |
1553 | return cmd->handler(argc, argv); | |
1554 | } | |
ea2384d3 | 1555 | } |
153859be SB |
1556 | |
1557 | /* not found */ | |
1558 | help(); | |
ea2384d3 FB |
1559 | return 0; |
1560 | } |