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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" |
f7b4a940 | 25 | #include "osdep.h" |
ec36ba14 | 26 | #include "block_int.h" |
926c2d23 | 27 | #include <assert.h> |
ea2384d3 | 28 | |
e8445331 | 29 | #ifdef _WIN32 |
4fddf62a | 30 | #define WIN32_LEAN_AND_MEAN |
e8445331 FB |
31 | #include <windows.h> |
32 | #endif | |
33 | ||
137519ce AJ |
34 | /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ |
35 | #define BRDV_O_FLAGS BDRV_O_CACHE_WB | |
36 | ||
a5e50b26 | 37 | static void QEMU_NORETURN error(const char *fmt, ...) |
ea2384d3 FB |
38 | { |
39 | va_list ap; | |
40 | va_start(ap, fmt); | |
57d1a2b6 | 41 | fprintf(stderr, "qemu-img: "); |
ea2384d3 FB |
42 | vfprintf(stderr, fmt, ap); |
43 | fprintf(stderr, "\n"); | |
44 | exit(1); | |
45 | va_end(ap); | |
46 | } | |
47 | ||
48 | static void format_print(void *opaque, const char *name) | |
49 | { | |
50 | printf(" %s", name); | |
51 | } | |
52 | ||
d2c639d6 | 53 | /* Please keep in synch with qemu-img.texi */ |
3f379ab1 | 54 | static void help(void) |
ea2384d3 | 55 | { |
68d0f70e | 56 | printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" |
57d1a2b6 | 57 | "usage: qemu-img command [command options]\n" |
ea2384d3 FB |
58 | "QEMU disk image utility\n" |
59 | "\n" | |
60 | "Command syntax:\n" | |
ec36ba14 | 61 | " create [-e] [-6] [-b base_image] [-f fmt] filename [size]\n" |
ea2384d3 | 62 | " commit [-f fmt] filename\n" |
f58c7b35 | 63 | " convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] [-B output_base_image] filename [filename2 [...]] output_filename\n" |
ea2384d3 | 64 | " info [-f fmt] filename\n" |
d2c639d6 | 65 | " snapshot [-l | -a snapshot | -c snapshot | -d snapshot] filename\n" |
ea2384d3 FB |
66 | "\n" |
67 | "Command parameters:\n" | |
68 | " 'filename' is a disk image filename\n" | |
69 | " 'base_image' is the read-only disk image which is used as base for a copy on\n" | |
70 | " write image; the copy on write image only stores the modified data\n" | |
f58c7b35 TS |
71 | " 'output_base_image' forces the output image to be created as a copy on write\n" |
72 | " image of the specified base image; 'output_base_image' should have the same\n" | |
73 | " content as the input's base image, however the path, image format, etc may\n" | |
74 | " differ\n" | |
ea2384d3 | 75 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" |
d2c639d6 | 76 | " 'size' is the disk image size in kilobytes. Optional suffixes\n" |
f902c419 AJ |
77 | " 'M' (megabyte, 1024 * 1024) and 'G' (gigabyte, 1024 * 1024 * 1024) are\n" |
78 | " supported any 'k' or 'K' is ignored\n" | |
ea2384d3 FB |
79 | " 'output_filename' is the destination disk image filename\n" |
80 | " 'output_fmt' is the destination format\n" | |
81 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
82 | " '-e' indicates that the target image must be encrypted (qcow format only)\n" | |
ec36ba14 | 83 | " '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n" |
d2c639d6 | 84 | " '-h' with or without a command shows this help and lists the supported formats\n" |
f7b4a940 | 85 | "\n" |
d2c639d6 BS |
86 | "Parameters to snapshot subcommand:\n" |
87 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
88 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
89 | " '-c' creates a snapshot\n" | |
90 | " '-d' deletes a snapshot\n" | |
91 | " '-l' lists all snapshots in the given image\n" | |
ea2384d3 | 92 | ); |
d2c639d6 | 93 | printf("\nSupported formats:"); |
ea2384d3 FB |
94 | bdrv_iterate_format(format_print, NULL); |
95 | printf("\n"); | |
96 | exit(1); | |
97 | } | |
98 | ||
ea2384d3 FB |
99 | #if defined(WIN32) |
100 | /* XXX: put correct support for win32 */ | |
101 | static int read_password(char *buf, int buf_size) | |
102 | { | |
103 | int c, i; | |
104 | printf("Password: "); | |
105 | fflush(stdout); | |
106 | i = 0; | |
107 | for(;;) { | |
108 | c = getchar(); | |
109 | if (c == '\n') | |
110 | break; | |
111 | if (i < (buf_size - 1)) | |
112 | buf[i++] = c; | |
113 | } | |
114 | buf[i] = '\0'; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | #else | |
119 | ||
120 | #include <termios.h> | |
121 | ||
122 | static struct termios oldtty; | |
123 | ||
124 | static void term_exit(void) | |
125 | { | |
126 | tcsetattr (0, TCSANOW, &oldtty); | |
127 | } | |
128 | ||
129 | static void term_init(void) | |
130 | { | |
131 | struct termios tty; | |
132 | ||
133 | tcgetattr (0, &tty); | |
134 | oldtty = tty; | |
135 | ||
136 | tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP | |
137 | |INLCR|IGNCR|ICRNL|IXON); | |
138 | tty.c_oflag |= OPOST; | |
139 | tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); | |
140 | tty.c_cflag &= ~(CSIZE|PARENB); | |
141 | tty.c_cflag |= CS8; | |
142 | tty.c_cc[VMIN] = 1; | |
143 | tty.c_cc[VTIME] = 0; | |
3b46e624 | 144 | |
ea2384d3 FB |
145 | tcsetattr (0, TCSANOW, &tty); |
146 | ||
147 | atexit(term_exit); | |
148 | } | |
149 | ||
3f379ab1 | 150 | static int read_password(char *buf, int buf_size) |
ea2384d3 FB |
151 | { |
152 | uint8_t ch; | |
153 | int i, ret; | |
154 | ||
155 | printf("password: "); | |
156 | fflush(stdout); | |
157 | term_init(); | |
158 | i = 0; | |
159 | for(;;) { | |
160 | ret = read(0, &ch, 1); | |
161 | if (ret == -1) { | |
162 | if (errno == EAGAIN || errno == EINTR) { | |
163 | continue; | |
164 | } else { | |
165 | ret = -1; | |
166 | break; | |
167 | } | |
168 | } else if (ret == 0) { | |
169 | ret = -1; | |
170 | break; | |
171 | } else { | |
172 | if (ch == '\r') { | |
173 | ret = 0; | |
174 | break; | |
175 | } | |
176 | if (i < (buf_size - 1)) | |
177 | buf[i++] = ch; | |
178 | } | |
179 | } | |
180 | term_exit(); | |
181 | buf[i] = '\0'; | |
182 | printf("\n"); | |
183 | return ret; | |
184 | } | |
185 | #endif | |
186 | ||
75c23805 FB |
187 | static BlockDriverState *bdrv_new_open(const char *filename, |
188 | const char *fmt) | |
189 | { | |
190 | BlockDriverState *bs; | |
191 | BlockDriver *drv; | |
192 | char password[256]; | |
193 | ||
194 | bs = bdrv_new(""); | |
195 | if (!bs) | |
196 | error("Not enough memory"); | |
197 | if (fmt) { | |
198 | drv = bdrv_find_format(fmt); | |
199 | if (!drv) | |
200 | error("Unknown file format '%s'", fmt); | |
201 | } else { | |
202 | drv = NULL; | |
203 | } | |
137519ce | 204 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
75c23805 FB |
205 | error("Could not open '%s'", filename); |
206 | } | |
207 | if (bdrv_is_encrypted(bs)) { | |
208 | printf("Disk image '%s' is encrypted.\n", filename); | |
209 | if (read_password(password, sizeof(password)) < 0) | |
210 | error("No password given"); | |
211 | if (bdrv_set_key(bs, password) < 0) | |
212 | error("invalid password"); | |
213 | } | |
214 | return bs; | |
215 | } | |
216 | ||
ea2384d3 FB |
217 | static int img_create(int argc, char **argv) |
218 | { | |
ec36ba14 | 219 | int c, ret, flags; |
ea2384d3 FB |
220 | const char *fmt = "raw"; |
221 | const char *filename; | |
222 | const char *base_filename = NULL; | |
96b8f136 | 223 | uint64_t size; |
ea2384d3 FB |
224 | const char *p; |
225 | BlockDriver *drv; | |
3b46e624 | 226 | |
ec36ba14 | 227 | flags = 0; |
ea2384d3 | 228 | for(;;) { |
ec36ba14 | 229 | c = getopt(argc, argv, "b:f:he6"); |
ea2384d3 FB |
230 | if (c == -1) |
231 | break; | |
232 | switch(c) { | |
233 | case 'h': | |
234 | help(); | |
235 | break; | |
236 | case 'b': | |
237 | base_filename = optarg; | |
238 | break; | |
239 | case 'f': | |
240 | fmt = optarg; | |
241 | break; | |
242 | case 'e': | |
ec36ba14 | 243 | flags |= BLOCK_FLAG_ENCRYPT; |
ea2384d3 | 244 | break; |
d8871c5a | 245 | case '6': |
ec36ba14 | 246 | flags |= BLOCK_FLAG_COMPAT6; |
d8871c5a | 247 | break; |
ea2384d3 FB |
248 | } |
249 | } | |
5fafdf24 | 250 | if (optind >= argc) |
ea2384d3 FB |
251 | help(); |
252 | filename = argv[optind++]; | |
253 | size = 0; | |
75c23805 | 254 | if (base_filename) { |
e94f3a60 | 255 | BlockDriverState *bs; |
75c23805 FB |
256 | bs = bdrv_new_open(base_filename, NULL); |
257 | bdrv_get_geometry(bs, &size); | |
258 | size *= 512; | |
259 | bdrv_delete(bs); | |
260 | } else { | |
ea2384d3 FB |
261 | if (optind >= argc) |
262 | help(); | |
263 | p = argv[optind]; | |
264 | size = strtoul(p, (char **)&p, 0); | |
265 | if (*p == 'M') { | |
266 | size *= 1024 * 1024; | |
267 | } else if (*p == 'G') { | |
268 | size *= 1024 * 1024 * 1024; | |
269 | } else if (*p == 'k' || *p == 'K' || *p == '\0') { | |
270 | size *= 1024; | |
271 | } else { | |
272 | help(); | |
273 | } | |
274 | } | |
275 | drv = bdrv_find_format(fmt); | |
276 | if (!drv) | |
277 | error("Unknown file format '%s'", fmt); | |
0cfec834 | 278 | printf("Formatting '%s', fmt=%s", |
ea2384d3 | 279 | filename, fmt); |
ec36ba14 | 280 | if (flags & BLOCK_FLAG_ENCRYPT) |
ea2384d3 | 281 | printf(", encrypted"); |
ec36ba14 TS |
282 | if (flags & BLOCK_FLAG_COMPAT6) |
283 | printf(", compatibility level=6"); | |
75c23805 FB |
284 | if (base_filename) { |
285 | printf(", backing_file=%s", | |
ea2384d3 | 286 | base_filename); |
75c23805 | 287 | } |
96b8f136 | 288 | printf(", size=%" PRIu64 " kB\n", size / 1024); |
ec36ba14 | 289 | ret = bdrv_create(drv, filename, size / 512, base_filename, flags); |
ea2384d3 FB |
290 | if (ret < 0) { |
291 | if (ret == -ENOTSUP) { | |
3c56521b | 292 | error("Formatting or formatting option not supported for file format '%s'", fmt); |
530a491f AL |
293 | } else if (ret == -EFBIG) { |
294 | error("The image size is too large for file format '%s'", fmt); | |
ea2384d3 FB |
295 | } else { |
296 | error("Error while formatting"); | |
297 | } | |
298 | } | |
299 | return 0; | |
300 | } | |
301 | ||
302 | static int img_commit(int argc, char **argv) | |
303 | { | |
304 | int c, ret; | |
305 | const char *filename, *fmt; | |
306 | BlockDriver *drv; | |
307 | BlockDriverState *bs; | |
308 | ||
309 | fmt = NULL; | |
310 | for(;;) { | |
311 | c = getopt(argc, argv, "f:h"); | |
312 | if (c == -1) | |
313 | break; | |
314 | switch(c) { | |
315 | case 'h': | |
316 | help(); | |
317 | break; | |
318 | case 'f': | |
319 | fmt = optarg; | |
320 | break; | |
321 | } | |
322 | } | |
5fafdf24 | 323 | if (optind >= argc) |
ea2384d3 FB |
324 | help(); |
325 | filename = argv[optind++]; | |
326 | ||
327 | bs = bdrv_new(""); | |
328 | if (!bs) | |
329 | error("Not enough memory"); | |
330 | if (fmt) { | |
331 | drv = bdrv_find_format(fmt); | |
332 | if (!drv) | |
333 | error("Unknown file format '%s'", fmt); | |
334 | } else { | |
335 | drv = NULL; | |
336 | } | |
137519ce | 337 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
ea2384d3 FB |
338 | error("Could not open '%s'", filename); |
339 | } | |
340 | ret = bdrv_commit(bs); | |
341 | switch(ret) { | |
342 | case 0: | |
343 | printf("Image committed.\n"); | |
344 | break; | |
345 | case -ENOENT: | |
346 | error("No disk inserted"); | |
347 | break; | |
348 | case -EACCES: | |
349 | error("Image is read-only"); | |
350 | break; | |
351 | case -ENOTSUP: | |
352 | error("Image is already committed"); | |
353 | break; | |
354 | default: | |
355 | error("Error while committing image"); | |
356 | break; | |
357 | } | |
358 | ||
359 | bdrv_delete(bs); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static int is_not_zero(const uint8_t *sector, int len) | |
364 | { | |
365 | int i; | |
366 | len >>= 2; | |
367 | for(i = 0;i < len; i++) { | |
368 | if (((uint32_t *)sector)[i] != 0) | |
369 | return 1; | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | ||
f58c7b35 TS |
374 | /* |
375 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
376 | * a non-NUL byte. | |
377 | * | |
378 | * 'pnum' is set to the number of sectors (including and immediately following | |
379 | * the first one) that are known to be in the same allocated/unallocated state. | |
380 | */ | |
ea2384d3 FB |
381 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
382 | { | |
383 | int v, i; | |
384 | ||
385 | if (n <= 0) { | |
386 | *pnum = 0; | |
387 | return 0; | |
388 | } | |
389 | v = is_not_zero(buf, 512); | |
390 | for(i = 1; i < n; i++) { | |
391 | buf += 512; | |
392 | if (v != is_not_zero(buf, 512)) | |
393 | break; | |
394 | } | |
395 | *pnum = i; | |
396 | return v; | |
397 | } | |
398 | ||
ea2384d3 FB |
399 | #define IO_BUF_SIZE 65536 |
400 | ||
401 | static int img_convert(int argc, char **argv) | |
402 | { | |
926c2d23 | 403 | int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors; |
f58c7b35 | 404 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
ea2384d3 | 405 | BlockDriver *drv; |
926c2d23 | 406 | BlockDriverState **bs, *out_bs; |
96b8f136 TS |
407 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
408 | uint64_t bs_sectors; | |
ea2384d3 FB |
409 | uint8_t buf[IO_BUF_SIZE]; |
410 | const uint8_t *buf1; | |
faea38e7 | 411 | BlockDriverInfo bdi; |
ea2384d3 FB |
412 | |
413 | fmt = NULL; | |
414 | out_fmt = "raw"; | |
f58c7b35 | 415 | out_baseimg = NULL; |
ec36ba14 | 416 | flags = 0; |
ea2384d3 | 417 | for(;;) { |
f58c7b35 | 418 | c = getopt(argc, argv, "f:O:B:hce6"); |
ea2384d3 FB |
419 | if (c == -1) |
420 | break; | |
421 | switch(c) { | |
422 | case 'h': | |
423 | help(); | |
424 | break; | |
425 | case 'f': | |
426 | fmt = optarg; | |
427 | break; | |
428 | case 'O': | |
429 | out_fmt = optarg; | |
430 | break; | |
f58c7b35 TS |
431 | case 'B': |
432 | out_baseimg = optarg; | |
433 | break; | |
ea2384d3 | 434 | case 'c': |
ec36ba14 | 435 | flags |= BLOCK_FLAG_COMPRESS; |
ea2384d3 FB |
436 | break; |
437 | case 'e': | |
ec36ba14 TS |
438 | flags |= BLOCK_FLAG_ENCRYPT; |
439 | break; | |
440 | case '6': | |
441 | flags |= BLOCK_FLAG_COMPAT6; | |
ea2384d3 FB |
442 | break; |
443 | } | |
444 | } | |
3b46e624 | 445 | |
926c2d23 AZ |
446 | bs_n = argc - optind - 1; |
447 | if (bs_n < 1) help(); | |
448 | ||
449 | out_filename = argv[argc - 1]; | |
f58c7b35 TS |
450 | |
451 | if (bs_n > 1 && out_baseimg) | |
452 | error("-B makes no sense when concatenating multiple input images"); | |
926c2d23 AZ |
453 | |
454 | bs = calloc(bs_n, sizeof(BlockDriverState *)); | |
455 | if (!bs) | |
456 | error("Out of memory"); | |
457 | ||
458 | total_sectors = 0; | |
459 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
460 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); | |
461 | if (!bs[bs_i]) | |
462 | error("Could not open '%s'", argv[optind + bs_i]); | |
463 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
464 | total_sectors += bs_sectors; | |
465 | } | |
ea2384d3 FB |
466 | |
467 | drv = bdrv_find_format(out_fmt); | |
468 | if (!drv) | |
d34dda5e | 469 | error("Unknown file format '%s'", out_fmt); |
ec36ba14 | 470 | if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2) |
ea2384d3 | 471 | error("Compression not supported for this file format"); |
ec36ba14 | 472 | if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2) |
ea2384d3 | 473 | error("Encryption not supported for this file format"); |
d8871c5a | 474 | if (flags & BLOCK_FLAG_COMPAT6 && drv != &bdrv_vmdk) |
ec36ba14 TS |
475 | error("Alternative compatibility level not supported for this file format"); |
476 | if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS) | |
ea2384d3 | 477 | error("Compression and encryption not supported at the same time"); |
926c2d23 | 478 | |
f58c7b35 | 479 | ret = bdrv_create(drv, out_filename, total_sectors, out_baseimg, flags); |
ea2384d3 FB |
480 | if (ret < 0) { |
481 | if (ret == -ENOTSUP) { | |
530a491f AL |
482 | error("Formatting not supported for file format '%s'", out_fmt); |
483 | } else if (ret == -EFBIG) { | |
484 | error("The image size is too large for file format '%s'", out_fmt); | |
ea2384d3 FB |
485 | } else { |
486 | error("Error while formatting '%s'", out_filename); | |
487 | } | |
488 | } | |
3b46e624 | 489 | |
ea2384d3 FB |
490 | out_bs = bdrv_new_open(out_filename, out_fmt); |
491 | ||
926c2d23 AZ |
492 | bs_i = 0; |
493 | bs_offset = 0; | |
494 | bdrv_get_geometry(bs[0], &bs_sectors); | |
495 | ||
496 | if (flags & BLOCK_FLAG_COMPRESS) { | |
faea38e7 FB |
497 | if (bdrv_get_info(out_bs, &bdi) < 0) |
498 | error("could not get block driver info"); | |
499 | cluster_size = bdi.cluster_size; | |
ea2384d3 FB |
500 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
501 | error("invalid cluster size"); | |
502 | cluster_sectors = cluster_size >> 9; | |
503 | sector_num = 0; | |
504 | for(;;) { | |
926c2d23 AZ |
505 | int64_t bs_num; |
506 | int remainder; | |
507 | uint8_t *buf2; | |
508 | ||
ea2384d3 FB |
509 | nb_sectors = total_sectors - sector_num; |
510 | if (nb_sectors <= 0) | |
511 | break; | |
512 | if (nb_sectors >= cluster_sectors) | |
513 | n = cluster_sectors; | |
514 | else | |
515 | n = nb_sectors; | |
926c2d23 AZ |
516 | |
517 | bs_num = sector_num - bs_offset; | |
518 | assert (bs_num >= 0); | |
519 | remainder = n; | |
520 | buf2 = buf; | |
521 | while (remainder > 0) { | |
522 | int nlow; | |
523 | while (bs_num == bs_sectors) { | |
524 | bs_i++; | |
525 | assert (bs_i < bs_n); | |
526 | bs_offset += bs_sectors; | |
527 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
528 | bs_num = 0; | |
529 | /* printf("changing part: sector_num=%lld, " | |
530 | "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n", | |
531 | sector_num, bs_i, bs_offset, bs_sectors); */ | |
532 | } | |
533 | assert (bs_num < bs_sectors); | |
534 | ||
535 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; | |
536 | ||
537 | if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) | |
538 | error("error while reading"); | |
539 | ||
540 | buf2 += nlow * 512; | |
541 | bs_num += nlow; | |
542 | ||
543 | remainder -= nlow; | |
544 | } | |
545 | assert (remainder == 0); | |
546 | ||
ea2384d3 FB |
547 | if (n < cluster_sectors) |
548 | memset(buf + n * 512, 0, cluster_size - n * 512); | |
549 | if (is_not_zero(buf, cluster_size)) { | |
5fafdf24 | 550 | if (bdrv_write_compressed(out_bs, sector_num, buf, |
faea38e7 | 551 | cluster_sectors) != 0) |
ec3757de FB |
552 | error("error while compressing sector %" PRId64, |
553 | sector_num); | |
ea2384d3 FB |
554 | } |
555 | sector_num += n; | |
556 | } | |
faea38e7 FB |
557 | /* signal EOF to align */ |
558 | bdrv_write_compressed(out_bs, 0, NULL, 0); | |
ea2384d3 | 559 | } else { |
f58c7b35 | 560 | sector_num = 0; // total number of sectors converted so far |
ea2384d3 FB |
561 | for(;;) { |
562 | nb_sectors = total_sectors - sector_num; | |
563 | if (nb_sectors <= 0) | |
564 | break; | |
565 | if (nb_sectors >= (IO_BUF_SIZE / 512)) | |
566 | n = (IO_BUF_SIZE / 512); | |
567 | else | |
568 | n = nb_sectors; | |
926c2d23 AZ |
569 | |
570 | while (sector_num - bs_offset >= bs_sectors) { | |
571 | bs_i ++; | |
572 | assert (bs_i < bs_n); | |
573 | bs_offset += bs_sectors; | |
574 | bdrv_get_geometry(bs[bs_i], &bs_sectors); | |
575 | /* printf("changing part: sector_num=%lld, bs_i=%d, " | |
576 | "bs_offset=%lld, bs_sectors=%lld\n", | |
577 | sector_num, bs_i, bs_offset, bs_sectors); */ | |
578 | } | |
579 | ||
580 | if (n > bs_offset + bs_sectors - sector_num) | |
581 | n = bs_offset + bs_sectors - sector_num; | |
582 | ||
f58c7b35 TS |
583 | /* If the output image is being created as a copy on write image, |
584 | assume that sectors which are unallocated in the input image | |
585 | are present in both the output's and input's base images (no | |
586 | need to copy them). */ | |
587 | if (out_baseimg) { | |
588 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, n, &n1)) { | |
589 | sector_num += n1; | |
590 | continue; | |
591 | } | |
592 | /* The next 'n1' sectors are allocated in the input image. Copy | |
593 | only those as they may be followed by unallocated sectors. */ | |
594 | n = n1; | |
595 | } | |
596 | ||
926c2d23 | 597 | if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
ea2384d3 FB |
598 | error("error while reading"); |
599 | /* NOTE: at the same time we convert, we do not write zero | |
600 | sectors to have a chance to compress the image. Ideally, we | |
601 | should add a specific call to have the info to go faster */ | |
602 | buf1 = buf; | |
603 | while (n > 0) { | |
f58c7b35 TS |
604 | /* If the output image is being created as a copy on write image, |
605 | copy all sectors even the ones containing only NUL bytes, | |
606 | because they may differ from the sectors in the base image. */ | |
607 | if (out_baseimg || is_allocated_sectors(buf1, n, &n1)) { | |
5fafdf24 | 608 | if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
ea2384d3 FB |
609 | error("error while writing"); |
610 | } | |
611 | sector_num += n1; | |
612 | n -= n1; | |
613 | buf1 += n1 * 512; | |
614 | } | |
615 | } | |
616 | } | |
617 | bdrv_delete(out_bs); | |
926c2d23 AZ |
618 | for (bs_i = 0; bs_i < bs_n; bs_i++) |
619 | bdrv_delete(bs[bs_i]); | |
620 | free(bs); | |
ea2384d3 FB |
621 | return 0; |
622 | } | |
623 | ||
57d1a2b6 FB |
624 | #ifdef _WIN32 |
625 | static int64_t get_allocated_file_size(const char *filename) | |
626 | { | |
e8445331 FB |
627 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
628 | get_compressed_t get_compressed; | |
57d1a2b6 | 629 | struct _stati64 st; |
e8445331 FB |
630 | |
631 | /* WinNT support GetCompressedFileSize to determine allocate size */ | |
632 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); | |
633 | if (get_compressed) { | |
634 | DWORD high, low; | |
635 | low = get_compressed(filename, &high); | |
636 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) | |
637 | return (((int64_t) high) << 32) + low; | |
638 | } | |
639 | ||
5fafdf24 | 640 | if (_stati64(filename, &st) < 0) |
57d1a2b6 FB |
641 | return -1; |
642 | return st.st_size; | |
643 | } | |
644 | #else | |
645 | static int64_t get_allocated_file_size(const char *filename) | |
646 | { | |
647 | struct stat st; | |
5fafdf24 | 648 | if (stat(filename, &st) < 0) |
57d1a2b6 FB |
649 | return -1; |
650 | return (int64_t)st.st_blocks * 512; | |
651 | } | |
652 | #endif | |
653 | ||
faea38e7 FB |
654 | static void dump_snapshots(BlockDriverState *bs) |
655 | { | |
656 | QEMUSnapshotInfo *sn_tab, *sn; | |
657 | int nb_sns, i; | |
658 | char buf[256]; | |
659 | ||
660 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
661 | if (nb_sns <= 0) | |
662 | return; | |
663 | printf("Snapshot list:\n"); | |
664 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); | |
665 | for(i = 0; i < nb_sns; i++) { | |
666 | sn = &sn_tab[i]; | |
667 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); | |
668 | } | |
669 | qemu_free(sn_tab); | |
670 | } | |
671 | ||
ea2384d3 FB |
672 | static int img_info(int argc, char **argv) |
673 | { | |
674 | int c; | |
675 | const char *filename, *fmt; | |
676 | BlockDriver *drv; | |
677 | BlockDriverState *bs; | |
678 | char fmt_name[128], size_buf[128], dsize_buf[128]; | |
96b8f136 TS |
679 | uint64_t total_sectors; |
680 | int64_t allocated_size; | |
93b6b2a3 FB |
681 | char backing_filename[1024]; |
682 | char backing_filename2[1024]; | |
faea38e7 | 683 | BlockDriverInfo bdi; |
ea2384d3 FB |
684 | |
685 | fmt = NULL; | |
686 | for(;;) { | |
687 | c = getopt(argc, argv, "f:h"); | |
688 | if (c == -1) | |
689 | break; | |
690 | switch(c) { | |
691 | case 'h': | |
692 | help(); | |
693 | break; | |
694 | case 'f': | |
695 | fmt = optarg; | |
696 | break; | |
697 | } | |
698 | } | |
5fafdf24 | 699 | if (optind >= argc) |
ea2384d3 FB |
700 | help(); |
701 | filename = argv[optind++]; | |
702 | ||
703 | bs = bdrv_new(""); | |
704 | if (!bs) | |
705 | error("Not enough memory"); | |
706 | if (fmt) { | |
707 | drv = bdrv_find_format(fmt); | |
708 | if (!drv) | |
709 | error("Unknown file format '%s'", fmt); | |
710 | } else { | |
711 | drv = NULL; | |
712 | } | |
137519ce | 713 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
ea2384d3 FB |
714 | error("Could not open '%s'", filename); |
715 | } | |
716 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); | |
717 | bdrv_get_geometry(bs, &total_sectors); | |
718 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); | |
57d1a2b6 FB |
719 | allocated_size = get_allocated_file_size(filename); |
720 | if (allocated_size < 0) | |
a10ea30b | 721 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
de167e41 | 722 | else |
5fafdf24 | 723 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
de167e41 | 724 | allocated_size); |
ea2384d3 FB |
725 | printf("image: %s\n" |
726 | "file format: %s\n" | |
ec3757de | 727 | "virtual size: %s (%" PRId64 " bytes)\n" |
ea2384d3 | 728 | "disk size: %s\n", |
5fafdf24 | 729 | filename, fmt_name, size_buf, |
ec3757de | 730 | (total_sectors * 512), |
ea2384d3 FB |
731 | dsize_buf); |
732 | if (bdrv_is_encrypted(bs)) | |
733 | printf("encrypted: yes\n"); | |
faea38e7 | 734 | if (bdrv_get_info(bs, &bdi) >= 0) { |
5fafdf24 | 735 | if (bdi.cluster_size != 0) |
faea38e7 FB |
736 | printf("cluster_size: %d\n", bdi.cluster_size); |
737 | } | |
93b6b2a3 | 738 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
faea38e7 | 739 | if (backing_filename[0] != '\0') { |
93b6b2a3 FB |
740 | path_combine(backing_filename2, sizeof(backing_filename2), |
741 | filename, backing_filename); | |
5fafdf24 | 742 | printf("backing file: %s (actual path: %s)\n", |
93b6b2a3 FB |
743 | backing_filename, |
744 | backing_filename2); | |
faea38e7 FB |
745 | } |
746 | dump_snapshots(bs); | |
ea2384d3 FB |
747 | bdrv_delete(bs); |
748 | return 0; | |
749 | } | |
750 | ||
f7b4a940 AL |
751 | #define SNAPSHOT_LIST 1 |
752 | #define SNAPSHOT_CREATE 2 | |
753 | #define SNAPSHOT_APPLY 3 | |
754 | #define SNAPSHOT_DELETE 4 | |
755 | ||
756 | static void img_snapshot(int argc, char **argv) | |
757 | { | |
758 | BlockDriverState *bs; | |
759 | QEMUSnapshotInfo sn; | |
760 | char *filename, *snapshot_name = NULL; | |
40a4539e | 761 | int c, ret; |
f7b4a940 AL |
762 | int action = 0; |
763 | qemu_timeval tv; | |
764 | ||
765 | /* Parse commandline parameters */ | |
766 | for(;;) { | |
767 | c = getopt(argc, argv, "la:c:d:h"); | |
768 | if (c == -1) | |
769 | break; | |
770 | switch(c) { | |
771 | case 'h': | |
772 | help(); | |
773 | return; | |
774 | case 'l': | |
775 | if (action) { | |
776 | help(); | |
777 | return; | |
778 | } | |
779 | action = SNAPSHOT_LIST; | |
780 | break; | |
781 | case 'a': | |
782 | if (action) { | |
783 | help(); | |
784 | return; | |
785 | } | |
786 | action = SNAPSHOT_APPLY; | |
787 | snapshot_name = optarg; | |
788 | break; | |
789 | case 'c': | |
790 | if (action) { | |
791 | help(); | |
792 | return; | |
793 | } | |
794 | action = SNAPSHOT_CREATE; | |
795 | snapshot_name = optarg; | |
796 | break; | |
797 | case 'd': | |
798 | if (action) { | |
799 | help(); | |
800 | return; | |
801 | } | |
802 | action = SNAPSHOT_DELETE; | |
803 | snapshot_name = optarg; | |
804 | break; | |
805 | } | |
806 | } | |
807 | ||
808 | if (optind >= argc) | |
809 | help(); | |
810 | filename = argv[optind++]; | |
811 | ||
812 | /* Open the image */ | |
813 | bs = bdrv_new(""); | |
814 | if (!bs) | |
815 | error("Not enough memory"); | |
816 | ||
817 | if (bdrv_open2(bs, filename, 0, NULL) < 0) { | |
818 | error("Could not open '%s'", filename); | |
819 | } | |
820 | ||
821 | /* Perform the requested action */ | |
822 | switch(action) { | |
823 | case SNAPSHOT_LIST: | |
824 | dump_snapshots(bs); | |
825 | break; | |
826 | ||
827 | case SNAPSHOT_CREATE: | |
828 | memset(&sn, 0, sizeof(sn)); | |
829 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
830 | ||
831 | qemu_gettimeofday(&tv); | |
832 | sn.date_sec = tv.tv_sec; | |
833 | sn.date_nsec = tv.tv_usec * 1000; | |
834 | ||
835 | ret = bdrv_snapshot_create(bs, &sn); | |
836 | if (ret) | |
837 | error("Could not create snapshot '%s': %d (%s)", | |
838 | snapshot_name, ret, strerror(-ret)); | |
839 | break; | |
840 | ||
841 | case SNAPSHOT_APPLY: | |
842 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
843 | if (ret) | |
844 | error("Could not apply snapshot '%s': %d (%s)", | |
845 | snapshot_name, ret, strerror(-ret)); | |
846 | break; | |
847 | ||
848 | case SNAPSHOT_DELETE: | |
849 | ret = bdrv_snapshot_delete(bs, snapshot_name); | |
850 | if (ret) | |
851 | error("Could not delete snapshot '%s': %d (%s)", | |
852 | snapshot_name, ret, strerror(-ret)); | |
853 | break; | |
854 | } | |
855 | ||
856 | /* Cleanup */ | |
857 | bdrv_delete(bs); | |
858 | } | |
859 | ||
ea2384d3 FB |
860 | int main(int argc, char **argv) |
861 | { | |
862 | const char *cmd; | |
863 | ||
864 | bdrv_init(); | |
865 | if (argc < 2) | |
866 | help(); | |
867 | cmd = argv[1]; | |
8f9b157e | 868 | argc--; argv++; |
ea2384d3 FB |
869 | if (!strcmp(cmd, "create")) { |
870 | img_create(argc, argv); | |
871 | } else if (!strcmp(cmd, "commit")) { | |
872 | img_commit(argc, argv); | |
873 | } else if (!strcmp(cmd, "convert")) { | |
874 | img_convert(argc, argv); | |
875 | } else if (!strcmp(cmd, "info")) { | |
876 | img_info(argc, argv); | |
f7b4a940 AL |
877 | } else if (!strcmp(cmd, "snapshot")) { |
878 | img_snapshot(argc, argv); | |
ea2384d3 FB |
879 | } else { |
880 | help(); | |
881 | } | |
882 | return 0; | |
883 | } |