Annotation of qemu/qemu-img.c, revision 1.1.1.8
1.1 root 1: /*
1.1.1.3 root 2: * QEMU disk image utility
1.1.1.4 root 3: *
4: * Copyright (c) 2003-2008 Fabrice Bellard
5: *
1.1 root 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: */
1.1.1.4 root 24: #include "qemu-common.h"
1.1.1.8 ! root 25: #include "qemu-option.h"
1.1.1.5 root 26: #include "osdep.h"
1.1.1.4 root 27: #include "block_int.h"
1.1.1.8 ! root 28: #include <stdio.h>
1.1 root 29:
1.1.1.2 root 30: #ifdef _WIN32
31: #include <windows.h>
32: #endif
33:
1.1.1.8 ! root 34: typedef struct img_cmd_t {
! 35: const char *name;
! 36: int (*handler)(int argc, char **argv);
! 37: } img_cmd_t;
! 38:
1.1.1.5 root 39: /* Default to cache=writeback as data integrity is not important for qemu-tcg. */
40: #define BRDV_O_FLAGS BDRV_O_CACHE_WB
1.1 root 41:
1.1.1.5 root 42: static void QEMU_NORETURN error(const char *fmt, ...)
1.1 root 43: {
44: va_list ap;
45: va_start(ap, fmt);
46: fprintf(stderr, "qemu-img: ");
47: vfprintf(stderr, fmt, ap);
48: fprintf(stderr, "\n");
49: exit(1);
50: va_end(ap);
51: }
52:
53: static void format_print(void *opaque, const char *name)
54: {
55: printf(" %s", name);
56: }
57:
1.1.1.5 root 58: /* Please keep in synch with qemu-img.texi */
1.1.1.4 root 59: static void help(void)
1.1 root 60: {
1.1.1.4 root 61: printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
1.1 root 62: "usage: qemu-img command [command options]\n"
63: "QEMU disk image utility\n"
64: "\n"
65: "Command syntax:\n"
1.1.1.8 ! root 66: #define DEF(option, callback, arg_string) \
! 67: " " arg_string "\n"
! 68: #include "qemu-img-cmds.h"
! 69: #undef DEF
! 70: #undef GEN_DOCS
1.1 root 71: "\n"
72: "Command parameters:\n"
73: " 'filename' is a disk image filename\n"
74: " 'base_image' is the read-only disk image which is used as base for a copy on\n"
75: " write image; the copy on write image only stores the modified data\n"
1.1.1.5 root 76: " 'output_base_image' forces the output image to be created as a copy on write\n"
77: " image of the specified base image; 'output_base_image' should have the same\n"
78: " content as the input's base image, however the path, image format, etc may\n"
79: " differ\n"
1.1 root 80: " 'fmt' is the disk image format. It is guessed automatically in most cases\n"
1.1.1.5 root 81: " 'size' is the disk image size in kilobytes. Optional suffixes\n"
1.1.1.6 root 82: " 'M' (megabyte, 1024 * 1024) and 'G' (gigabyte, 1024 * 1024 * 1024) are\n"
83: " supported any 'k' or 'K' is ignored\n"
1.1 root 84: " 'output_filename' is the destination disk image filename\n"
85: " 'output_fmt' is the destination format\n"
1.1.1.8 ! root 86: " 'options' is a comma separated list of format specific options in a\n"
! 87: " name=value format. Use -o ? for an overview of the options supported by the\n"
! 88: " used format\n"
1.1 root 89: " '-c' indicates that target image must be compressed (qcow format only)\n"
1.1.1.5 root 90: " '-h' with or without a command shows this help and lists the supported formats\n"
91: "\n"
92: "Parameters to snapshot subcommand:\n"
93: " 'snapshot' is the name of the snapshot to create, apply or delete\n"
94: " '-a' applies a snapshot (revert disk to saved state)\n"
95: " '-c' creates a snapshot\n"
96: " '-d' deletes a snapshot\n"
97: " '-l' lists all snapshots in the given image\n"
1.1 root 98: );
1.1.1.5 root 99: printf("\nSupported formats:");
1.1 root 100: bdrv_iterate_format(format_print, NULL);
101: printf("\n");
102: exit(1);
103: }
104:
105: #if defined(WIN32)
106: /* XXX: put correct support for win32 */
107: static int read_password(char *buf, int buf_size)
108: {
109: int c, i;
110: printf("Password: ");
111: fflush(stdout);
112: i = 0;
113: for(;;) {
114: c = getchar();
115: if (c == '\n')
116: break;
117: if (i < (buf_size - 1))
118: buf[i++] = c;
119: }
120: buf[i] = '\0';
121: return 0;
122: }
123:
124: #else
125:
126: #include <termios.h>
127:
128: static struct termios oldtty;
129:
130: static void term_exit(void)
131: {
132: tcsetattr (0, TCSANOW, &oldtty);
133: }
134:
135: static void term_init(void)
136: {
137: struct termios tty;
138:
139: tcgetattr (0, &tty);
140: oldtty = tty;
141:
142: tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
143: |INLCR|IGNCR|ICRNL|IXON);
144: tty.c_oflag |= OPOST;
145: tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
146: tty.c_cflag &= ~(CSIZE|PARENB);
147: tty.c_cflag |= CS8;
148: tty.c_cc[VMIN] = 1;
149: tty.c_cc[VTIME] = 0;
1.1.1.4 root 150:
1.1 root 151: tcsetattr (0, TCSANOW, &tty);
152:
153: atexit(term_exit);
154: }
155:
1.1.1.4 root 156: static int read_password(char *buf, int buf_size)
1.1 root 157: {
158: uint8_t ch;
159: int i, ret;
160:
161: printf("password: ");
162: fflush(stdout);
163: term_init();
164: i = 0;
165: for(;;) {
166: ret = read(0, &ch, 1);
167: if (ret == -1) {
168: if (errno == EAGAIN || errno == EINTR) {
169: continue;
170: } else {
171: ret = -1;
172: break;
173: }
174: } else if (ret == 0) {
175: ret = -1;
176: break;
177: } else {
178: if (ch == '\r') {
179: ret = 0;
180: break;
181: }
182: if (i < (buf_size - 1))
183: buf[i++] = ch;
184: }
185: }
186: term_exit();
187: buf[i] = '\0';
188: printf("\n");
189: return ret;
190: }
191: #endif
192:
193: static BlockDriverState *bdrv_new_open(const char *filename,
194: const char *fmt)
195: {
196: BlockDriverState *bs;
197: BlockDriver *drv;
198: char password[256];
199:
200: bs = bdrv_new("");
201: if (!bs)
202: error("Not enough memory");
203: if (fmt) {
204: drv = bdrv_find_format(fmt);
205: if (!drv)
206: error("Unknown file format '%s'", fmt);
207: } else {
208: drv = NULL;
209: }
1.1.1.5 root 210: if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
1.1 root 211: error("Could not open '%s'", filename);
212: }
213: if (bdrv_is_encrypted(bs)) {
214: printf("Disk image '%s' is encrypted.\n", filename);
215: if (read_password(password, sizeof(password)) < 0)
216: error("No password given");
217: if (bdrv_set_key(bs, password) < 0)
218: error("invalid password");
219: }
220: return bs;
221: }
222:
1.1.1.8 ! root 223: static void add_old_style_options(const char *fmt, QEMUOptionParameter *list,
! 224: int flags, const char *base_filename, const char *base_fmt)
! 225: {
! 226: if (flags & BLOCK_FLAG_ENCRYPT) {
! 227: if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) {
! 228: error("Encryption not supported for file format '%s'", fmt);
! 229: }
! 230: }
! 231: if (flags & BLOCK_FLAG_COMPAT6) {
! 232: if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) {
! 233: error("VMDK version 6 not supported for file format '%s'", fmt);
! 234: }
! 235: }
! 236:
! 237: if (base_filename) {
! 238: if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
! 239: error("Backing file not supported for file format '%s'", fmt);
! 240: }
! 241: }
! 242: if (base_fmt) {
! 243: if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
! 244: error("Backing file format not supported for file format '%s'", fmt);
! 245: }
! 246: }
! 247: }
! 248:
1.1 root 249: static int img_create(int argc, char **argv)
250: {
1.1.1.4 root 251: int c, ret, flags;
1.1 root 252: const char *fmt = "raw";
1.1.1.8 ! root 253: const char *base_fmt = NULL;
1.1 root 254: const char *filename;
255: const char *base_filename = NULL;
256: BlockDriver *drv;
1.1.1.8 ! root 257: QEMUOptionParameter *param = NULL;
! 258: char *options = NULL;
1.1.1.4 root 259:
260: flags = 0;
1.1 root 261: for(;;) {
1.1.1.8 ! root 262: c = getopt(argc, argv, "F:b:f:he6o:");
1.1 root 263: if (c == -1)
264: break;
265: switch(c) {
266: case 'h':
267: help();
268: break;
1.1.1.8 ! root 269: case 'F':
! 270: base_fmt = optarg;
! 271: break;
1.1 root 272: case 'b':
273: base_filename = optarg;
274: break;
275: case 'f':
276: fmt = optarg;
277: break;
278: case 'e':
1.1.1.4 root 279: flags |= BLOCK_FLAG_ENCRYPT;
280: break;
281: case '6':
282: flags |= BLOCK_FLAG_COMPAT6;
1.1 root 283: break;
1.1.1.8 ! root 284: case 'o':
! 285: options = optarg;
! 286: break;
1.1 root 287: }
288: }
1.1.1.8 ! root 289:
! 290: /* Find driver and parse its options */
! 291: drv = bdrv_find_format(fmt);
! 292: if (!drv)
! 293: error("Unknown file format '%s'", fmt);
! 294:
! 295: if (options && !strcmp(options, "?")) {
! 296: print_option_help(drv->create_options);
! 297: return 0;
! 298: }
! 299:
! 300: if (options) {
! 301: param = parse_option_parameters(options, drv->create_options, param);
! 302: if (param == NULL) {
! 303: error("Invalid options for file format '%s'.", fmt);
! 304: }
! 305: } else {
! 306: param = parse_option_parameters("", drv->create_options, param);
! 307: }
! 308:
! 309: /* Get the filename */
1.1.1.4 root 310: if (optind >= argc)
1.1 root 311: help();
312: filename = argv[optind++];
1.1.1.8 ! root 313:
! 314: /* Add size to parameters */
! 315: if (optind < argc) {
! 316: set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]);
! 317: }
! 318:
! 319: /* Add old-style options to parameters */
! 320: add_old_style_options(fmt, param, flags, base_filename, base_fmt);
! 321:
! 322: // The size for the image must always be specified, with one exception:
! 323: // If we are using a backing file, we can obtain the size from there
! 324: if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) {
! 325:
! 326: QEMUOptionParameter *backing_file =
! 327: get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
! 328: QEMUOptionParameter *backing_fmt =
! 329: get_option_parameter(param, BLOCK_OPT_BACKING_FMT);
! 330:
! 331: if (backing_file && backing_file->value.s) {
! 332: BlockDriverState *bs;
! 333: uint64_t size;
! 334: const char *fmt = NULL;
! 335: char buf[32];
! 336:
! 337: if (backing_fmt && backing_fmt->value.s) {
! 338: if (bdrv_find_format(backing_fmt->value.s)) {
! 339: fmt = backing_fmt->value.s;
! 340: } else {
! 341: error("Unknown backing file format '%s'",
! 342: backing_fmt->value.s);
! 343: }
! 344: }
! 345:
! 346: bs = bdrv_new_open(backing_file->value.s, fmt);
! 347: bdrv_get_geometry(bs, &size);
! 348: size *= 512;
! 349: bdrv_delete(bs);
! 350:
! 351: snprintf(buf, sizeof(buf), "%" PRId64, size);
! 352: set_option_parameter(param, BLOCK_OPT_SIZE, buf);
1.1 root 353: } else {
1.1.1.8 ! root 354: error("Image creation needs a size parameter");
1.1 root 355: }
356: }
1.1.1.8 ! root 357:
! 358: printf("Formatting '%s', fmt=%s ", filename, fmt);
! 359: print_option_parameters(param);
! 360: puts("");
! 361:
! 362: ret = bdrv_create(drv, filename, param);
! 363: free_option_parameters(param);
! 364:
1.1 root 365: if (ret < 0) {
366: if (ret == -ENOTSUP) {
367: error("Formatting or formatting option not supported for file format '%s'", fmt);
1.1.1.7 root 368: } else if (ret == -EFBIG) {
369: error("The image size is too large for file format '%s'", fmt);
1.1 root 370: } else {
371: error("Error while formatting");
372: }
373: }
374: return 0;
375: }
376:
1.1.1.8 ! root 377: static int img_check(int argc, char **argv)
! 378: {
! 379: int c, ret;
! 380: const char *filename, *fmt;
! 381: BlockDriver *drv;
! 382: BlockDriverState *bs;
! 383:
! 384: fmt = NULL;
! 385: for(;;) {
! 386: c = getopt(argc, argv, "f:h");
! 387: if (c == -1)
! 388: break;
! 389: switch(c) {
! 390: case 'h':
! 391: help();
! 392: break;
! 393: case 'f':
! 394: fmt = optarg;
! 395: break;
! 396: }
! 397: }
! 398: if (optind >= argc)
! 399: help();
! 400: filename = argv[optind++];
! 401:
! 402: bs = bdrv_new("");
! 403: if (!bs)
! 404: error("Not enough memory");
! 405: if (fmt) {
! 406: drv = bdrv_find_format(fmt);
! 407: if (!drv)
! 408: error("Unknown file format '%s'", fmt);
! 409: } else {
! 410: drv = NULL;
! 411: }
! 412: if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
! 413: error("Could not open '%s'", filename);
! 414: }
! 415: ret = bdrv_check(bs);
! 416: switch(ret) {
! 417: case 0:
! 418: printf("No errors were found on the image.\n");
! 419: break;
! 420: case -ENOTSUP:
! 421: error("This image format does not support checks");
! 422: break;
! 423: default:
! 424: if (ret < 0) {
! 425: error("An error occurred during the check");
! 426: } else {
! 427: printf("%d errors were found on the image.\n", ret);
! 428: }
! 429: break;
! 430: }
! 431:
! 432: bdrv_delete(bs);
! 433: return 0;
! 434: }
! 435:
1.1 root 436: static int img_commit(int argc, char **argv)
437: {
438: int c, ret;
439: const char *filename, *fmt;
440: BlockDriver *drv;
441: BlockDriverState *bs;
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: }
1.1.1.4 root 457: if (optind >= argc)
1.1 root 458: help();
459: filename = argv[optind++];
460:
461: bs = bdrv_new("");
462: if (!bs)
463: error("Not enough memory");
464: if (fmt) {
465: drv = bdrv_find_format(fmt);
466: if (!drv)
467: error("Unknown file format '%s'", fmt);
468: } else {
469: drv = NULL;
470: }
1.1.1.5 root 471: if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
1.1 root 472: error("Could not open '%s'", filename);
473: }
474: ret = bdrv_commit(bs);
475: switch(ret) {
476: case 0:
477: printf("Image committed.\n");
478: break;
479: case -ENOENT:
480: error("No disk inserted");
481: break;
482: case -EACCES:
483: error("Image is read-only");
484: break;
485: case -ENOTSUP:
486: error("Image is already committed");
487: break;
488: default:
489: error("Error while committing image");
490: break;
491: }
492:
493: bdrv_delete(bs);
494: return 0;
495: }
496:
497: static int is_not_zero(const uint8_t *sector, int len)
498: {
499: int i;
500: len >>= 2;
501: for(i = 0;i < len; i++) {
502: if (((uint32_t *)sector)[i] != 0)
503: return 1;
504: }
505: return 0;
506: }
507:
1.1.1.5 root 508: /*
509: * Returns true iff the first sector pointed to by 'buf' contains at least
510: * a non-NUL byte.
511: *
512: * 'pnum' is set to the number of sectors (including and immediately following
513: * the first one) that are known to be in the same allocated/unallocated state.
514: */
1.1 root 515: static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
516: {
517: int v, i;
518:
519: if (n <= 0) {
520: *pnum = 0;
521: return 0;
522: }
523: v = is_not_zero(buf, 512);
524: for(i = 1; i < n; i++) {
525: buf += 512;
526: if (v != is_not_zero(buf, 512))
527: break;
528: }
529: *pnum = i;
530: return v;
531: }
532:
533: #define IO_BUF_SIZE 65536
534:
535: static int img_convert(int argc, char **argv)
536: {
1.1.1.4 root 537: int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
1.1.1.5 root 538: const char *fmt, *out_fmt, *out_baseimg, *out_filename;
1.1 root 539: BlockDriver *drv;
1.1.1.4 root 540: BlockDriverState **bs, *out_bs;
541: int64_t total_sectors, nb_sectors, sector_num, bs_offset;
542: uint64_t bs_sectors;
1.1 root 543: uint8_t buf[IO_BUF_SIZE];
544: const uint8_t *buf1;
1.1.1.3 root 545: BlockDriverInfo bdi;
1.1.1.8 ! root 546: QEMUOptionParameter *param = NULL;
! 547: char *options = NULL;
1.1 root 548:
549: fmt = NULL;
550: out_fmt = "raw";
1.1.1.5 root 551: out_baseimg = NULL;
1.1.1.4 root 552: flags = 0;
1.1 root 553: for(;;) {
1.1.1.8 ! root 554: c = getopt(argc, argv, "f:O:B:hce6o:");
1.1 root 555: if (c == -1)
556: break;
557: switch(c) {
558: case 'h':
559: help();
560: break;
561: case 'f':
562: fmt = optarg;
563: break;
564: case 'O':
565: out_fmt = optarg;
566: break;
1.1.1.5 root 567: case 'B':
568: out_baseimg = optarg;
569: break;
1.1 root 570: case 'c':
1.1.1.4 root 571: flags |= BLOCK_FLAG_COMPRESS;
1.1 root 572: break;
573: case 'e':
1.1.1.4 root 574: flags |= BLOCK_FLAG_ENCRYPT;
575: break;
576: case '6':
577: flags |= BLOCK_FLAG_COMPAT6;
1.1 root 578: break;
1.1.1.8 ! root 579: case 'o':
! 580: options = optarg;
! 581: break;
1.1 root 582: }
583: }
1.1.1.4 root 584:
585: bs_n = argc - optind - 1;
586: if (bs_n < 1) help();
587:
588: out_filename = argv[argc - 1];
1.1.1.5 root 589:
590: if (bs_n > 1 && out_baseimg)
591: error("-B makes no sense when concatenating multiple input images");
1.1.1.4 root 592:
593: bs = calloc(bs_n, sizeof(BlockDriverState *));
594: if (!bs)
595: error("Out of memory");
596:
597: total_sectors = 0;
598: for (bs_i = 0; bs_i < bs_n; bs_i++) {
599: bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
600: if (!bs[bs_i])
601: error("Could not open '%s'", argv[optind + bs_i]);
602: bdrv_get_geometry(bs[bs_i], &bs_sectors);
603: total_sectors += bs_sectors;
604: }
1.1 root 605:
1.1.1.8 ! root 606: /* Find driver and parse its options */
1.1 root 607: drv = bdrv_find_format(out_fmt);
608: if (!drv)
1.1.1.4 root 609: error("Unknown file format '%s'", out_fmt);
610:
1.1.1.8 ! root 611: if (options && !strcmp(options, "?")) {
! 612: print_option_help(drv->create_options);
! 613: return 0;
! 614: }
! 615:
! 616: if (options) {
! 617: param = parse_option_parameters(options, drv->create_options, param);
! 618: if (param == NULL) {
! 619: error("Invalid options for file format '%s'.", out_fmt);
! 620: }
! 621: } else {
! 622: param = parse_option_parameters("", drv->create_options, param);
! 623: }
! 624:
! 625: set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
! 626: add_old_style_options(out_fmt, param, flags, out_baseimg, NULL);
! 627:
! 628: /* Check if compression is supported */
! 629: if (flags & BLOCK_FLAG_COMPRESS) {
! 630: QEMUOptionParameter *encryption =
! 631: get_option_parameter(param, BLOCK_OPT_ENCRYPT);
! 632:
! 633: if (!drv->bdrv_write_compressed) {
! 634: error("Compression not supported for this file format");
! 635: }
! 636:
! 637: if (encryption && encryption->value.n) {
! 638: error("Compression and encryption not supported at the same time");
! 639: }
! 640: }
! 641:
! 642: /* Create the new image */
! 643: ret = bdrv_create(drv, out_filename, param);
! 644: free_option_parameters(param);
! 645:
1.1 root 646: if (ret < 0) {
647: if (ret == -ENOTSUP) {
1.1.1.7 root 648: error("Formatting not supported for file format '%s'", out_fmt);
649: } else if (ret == -EFBIG) {
650: error("The image size is too large for file format '%s'", out_fmt);
1.1 root 651: } else {
652: error("Error while formatting '%s'", out_filename);
653: }
654: }
1.1.1.4 root 655:
1.1 root 656: out_bs = bdrv_new_open(out_filename, out_fmt);
657:
1.1.1.4 root 658: bs_i = 0;
659: bs_offset = 0;
660: bdrv_get_geometry(bs[0], &bs_sectors);
661:
662: if (flags & BLOCK_FLAG_COMPRESS) {
1.1.1.3 root 663: if (bdrv_get_info(out_bs, &bdi) < 0)
664: error("could not get block driver info");
665: cluster_size = bdi.cluster_size;
1.1 root 666: if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
667: error("invalid cluster size");
668: cluster_sectors = cluster_size >> 9;
669: sector_num = 0;
670: for(;;) {
1.1.1.4 root 671: int64_t bs_num;
672: int remainder;
673: uint8_t *buf2;
674:
1.1 root 675: nb_sectors = total_sectors - sector_num;
676: if (nb_sectors <= 0)
677: break;
678: if (nb_sectors >= cluster_sectors)
679: n = cluster_sectors;
680: else
681: n = nb_sectors;
1.1.1.4 root 682:
683: bs_num = sector_num - bs_offset;
684: assert (bs_num >= 0);
685: remainder = n;
686: buf2 = buf;
687: while (remainder > 0) {
688: int nlow;
689: while (bs_num == bs_sectors) {
690: bs_i++;
691: assert (bs_i < bs_n);
692: bs_offset += bs_sectors;
693: bdrv_get_geometry(bs[bs_i], &bs_sectors);
694: bs_num = 0;
695: /* printf("changing part: sector_num=%lld, "
696: "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
697: sector_num, bs_i, bs_offset, bs_sectors); */
698: }
699: assert (bs_num < bs_sectors);
700:
701: nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
702:
703: if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0)
704: error("error while reading");
705:
706: buf2 += nlow * 512;
707: bs_num += nlow;
708:
709: remainder -= nlow;
710: }
711: assert (remainder == 0);
712:
1.1 root 713: if (n < cluster_sectors)
714: memset(buf + n * 512, 0, cluster_size - n * 512);
715: if (is_not_zero(buf, cluster_size)) {
1.1.1.4 root 716: if (bdrv_write_compressed(out_bs, sector_num, buf,
1.1.1.3 root 717: cluster_sectors) != 0)
1.1.1.2 root 718: error("error while compressing sector %" PRId64,
719: sector_num);
1.1 root 720: }
721: sector_num += n;
722: }
1.1.1.3 root 723: /* signal EOF to align */
724: bdrv_write_compressed(out_bs, 0, NULL, 0);
1.1 root 725: } else {
1.1.1.5 root 726: sector_num = 0; // total number of sectors converted so far
1.1 root 727: for(;;) {
728: nb_sectors = total_sectors - sector_num;
729: if (nb_sectors <= 0)
730: break;
731: if (nb_sectors >= (IO_BUF_SIZE / 512))
732: n = (IO_BUF_SIZE / 512);
733: else
734: n = nb_sectors;
1.1.1.4 root 735:
736: while (sector_num - bs_offset >= bs_sectors) {
737: bs_i ++;
738: assert (bs_i < bs_n);
739: bs_offset += bs_sectors;
740: bdrv_get_geometry(bs[bs_i], &bs_sectors);
741: /* printf("changing part: sector_num=%lld, bs_i=%d, "
742: "bs_offset=%lld, bs_sectors=%lld\n",
743: sector_num, bs_i, bs_offset, bs_sectors); */
744: }
745:
746: if (n > bs_offset + bs_sectors - sector_num)
747: n = bs_offset + bs_sectors - sector_num;
748:
1.1.1.8 ! root 749: if (strcmp(drv->format_name, "host_device")) {
! 750: /* If the output image is being created as a copy on write image,
! 751: assume that sectors which are unallocated in the input image
! 752: are present in both the output's and input's base images (no
! 753: need to copy them). */
! 754: if (out_baseimg) {
! 755: if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
! 756: n, &n1)) {
! 757: sector_num += n1;
! 758: continue;
! 759: }
! 760: /* The next 'n1' sectors are allocated in the input image. Copy
! 761: only those as they may be followed by unallocated sectors. */
! 762: n = n1;
! 763: }
! 764: } else {
! 765: n1 = n;
1.1.1.5 root 766: }
767:
1.1.1.4 root 768: if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0)
1.1 root 769: error("error while reading");
770: /* NOTE: at the same time we convert, we do not write zero
771: sectors to have a chance to compress the image. Ideally, we
772: should add a specific call to have the info to go faster */
773: buf1 = buf;
774: while (n > 0) {
1.1.1.5 root 775: /* If the output image is being created as a copy on write image,
776: copy all sectors even the ones containing only NUL bytes,
1.1.1.8 ! root 777: because they may differ from the sectors in the base image.
! 778:
! 779: If the output is to a host device, we also write out
! 780: sectors that are entirely 0, since whatever data was
! 781: already there is garbage, not 0s. */
! 782: if (strcmp(drv->format_name, "host_device") == 0 || out_baseimg ||
! 783: is_allocated_sectors(buf1, n, &n1)) {
1.1.1.4 root 784: if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
1.1 root 785: error("error while writing");
786: }
787: sector_num += n1;
788: n -= n1;
789: buf1 += n1 * 512;
790: }
791: }
792: }
793: bdrv_delete(out_bs);
1.1.1.4 root 794: for (bs_i = 0; bs_i < bs_n; bs_i++)
795: bdrv_delete(bs[bs_i]);
796: free(bs);
1.1 root 797: return 0;
798: }
799:
800: #ifdef _WIN32
801: static int64_t get_allocated_file_size(const char *filename)
802: {
1.1.1.2 root 803: typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
804: get_compressed_t get_compressed;
1.1 root 805: struct _stati64 st;
1.1.1.2 root 806:
807: /* WinNT support GetCompressedFileSize to determine allocate size */
808: get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
809: if (get_compressed) {
810: DWORD high, low;
811: low = get_compressed(filename, &high);
812: if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
813: return (((int64_t) high) << 32) + low;
814: }
815:
1.1.1.4 root 816: if (_stati64(filename, &st) < 0)
1.1 root 817: return -1;
818: return st.st_size;
819: }
820: #else
821: static int64_t get_allocated_file_size(const char *filename)
822: {
823: struct stat st;
1.1.1.4 root 824: if (stat(filename, &st) < 0)
1.1 root 825: return -1;
826: return (int64_t)st.st_blocks * 512;
827: }
828: #endif
829:
1.1.1.3 root 830: static void dump_snapshots(BlockDriverState *bs)
831: {
832: QEMUSnapshotInfo *sn_tab, *sn;
833: int nb_sns, i;
834: char buf[256];
835:
836: nb_sns = bdrv_snapshot_list(bs, &sn_tab);
837: if (nb_sns <= 0)
838: return;
839: printf("Snapshot list:\n");
840: printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
841: for(i = 0; i < nb_sns; i++) {
842: sn = &sn_tab[i];
843: printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
844: }
845: qemu_free(sn_tab);
846: }
847:
1.1 root 848: static int img_info(int argc, char **argv)
849: {
850: int c;
851: const char *filename, *fmt;
852: BlockDriver *drv;
853: BlockDriverState *bs;
854: char fmt_name[128], size_buf[128], dsize_buf[128];
1.1.1.4 root 855: uint64_t total_sectors;
856: int64_t allocated_size;
1.1.1.3 root 857: char backing_filename[1024];
858: char backing_filename2[1024];
859: BlockDriverInfo bdi;
1.1 root 860:
861: fmt = NULL;
862: for(;;) {
863: c = getopt(argc, argv, "f:h");
864: if (c == -1)
865: break;
866: switch(c) {
867: case 'h':
868: help();
869: break;
870: case 'f':
871: fmt = optarg;
872: break;
873: }
874: }
1.1.1.4 root 875: if (optind >= argc)
1.1 root 876: help();
877: filename = argv[optind++];
878:
879: bs = bdrv_new("");
880: if (!bs)
881: error("Not enough memory");
882: if (fmt) {
883: drv = bdrv_find_format(fmt);
884: if (!drv)
885: error("Unknown file format '%s'", fmt);
886: } else {
887: drv = NULL;
888: }
1.1.1.5 root 889: if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
1.1 root 890: error("Could not open '%s'", filename);
891: }
892: bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
893: bdrv_get_geometry(bs, &total_sectors);
894: get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
895: allocated_size = get_allocated_file_size(filename);
896: if (allocated_size < 0)
1.1.1.5 root 897: snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
1.1 root 898: else
1.1.1.4 root 899: get_human_readable_size(dsize_buf, sizeof(dsize_buf),
1.1 root 900: allocated_size);
901: printf("image: %s\n"
902: "file format: %s\n"
1.1.1.2 root 903: "virtual size: %s (%" PRId64 " bytes)\n"
1.1 root 904: "disk size: %s\n",
1.1.1.4 root 905: filename, fmt_name, size_buf,
1.1.1.2 root 906: (total_sectors * 512),
1.1 root 907: dsize_buf);
908: if (bdrv_is_encrypted(bs))
909: printf("encrypted: yes\n");
1.1.1.3 root 910: if (bdrv_get_info(bs, &bdi) >= 0) {
1.1.1.4 root 911: if (bdi.cluster_size != 0)
1.1.1.3 root 912: printf("cluster_size: %d\n", bdi.cluster_size);
913: }
914: bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
915: if (backing_filename[0] != '\0') {
916: path_combine(backing_filename2, sizeof(backing_filename2),
917: filename, backing_filename);
1.1.1.4 root 918: printf("backing file: %s (actual path: %s)\n",
1.1.1.3 root 919: backing_filename,
920: backing_filename2);
921: }
922: dump_snapshots(bs);
1.1 root 923: bdrv_delete(bs);
924: return 0;
925: }
926:
1.1.1.5 root 927: #define SNAPSHOT_LIST 1
928: #define SNAPSHOT_CREATE 2
929: #define SNAPSHOT_APPLY 3
930: #define SNAPSHOT_DELETE 4
931:
1.1.1.8 ! root 932: static int img_snapshot(int argc, char **argv)
1.1.1.5 root 933: {
934: BlockDriverState *bs;
935: QEMUSnapshotInfo sn;
936: char *filename, *snapshot_name = NULL;
937: int c, ret;
938: int action = 0;
939: qemu_timeval tv;
940:
941: /* Parse commandline parameters */
942: for(;;) {
943: c = getopt(argc, argv, "la:c:d:h");
944: if (c == -1)
945: break;
946: switch(c) {
947: case 'h':
948: help();
1.1.1.8 ! root 949: return 0;
1.1.1.5 root 950: case 'l':
951: if (action) {
952: help();
1.1.1.8 ! root 953: return 0;
1.1.1.5 root 954: }
955: action = SNAPSHOT_LIST;
956: break;
957: case 'a':
958: if (action) {
959: help();
1.1.1.8 ! root 960: return 0;
1.1.1.5 root 961: }
962: action = SNAPSHOT_APPLY;
963: snapshot_name = optarg;
964: break;
965: case 'c':
966: if (action) {
967: help();
1.1.1.8 ! root 968: return 0;
1.1.1.5 root 969: }
970: action = SNAPSHOT_CREATE;
971: snapshot_name = optarg;
972: break;
973: case 'd':
974: if (action) {
975: help();
1.1.1.8 ! root 976: return 0;
1.1.1.5 root 977: }
978: action = SNAPSHOT_DELETE;
979: snapshot_name = optarg;
980: break;
981: }
982: }
983:
984: if (optind >= argc)
985: help();
986: filename = argv[optind++];
987:
988: /* Open the image */
989: bs = bdrv_new("");
990: if (!bs)
991: error("Not enough memory");
992:
993: if (bdrv_open2(bs, filename, 0, NULL) < 0) {
994: error("Could not open '%s'", filename);
995: }
996:
997: /* Perform the requested action */
998: switch(action) {
999: case SNAPSHOT_LIST:
1000: dump_snapshots(bs);
1001: break;
1002:
1003: case SNAPSHOT_CREATE:
1004: memset(&sn, 0, sizeof(sn));
1005: pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
1006:
1007: qemu_gettimeofday(&tv);
1008: sn.date_sec = tv.tv_sec;
1009: sn.date_nsec = tv.tv_usec * 1000;
1010:
1011: ret = bdrv_snapshot_create(bs, &sn);
1012: if (ret)
1013: error("Could not create snapshot '%s': %d (%s)",
1014: snapshot_name, ret, strerror(-ret));
1015: break;
1016:
1017: case SNAPSHOT_APPLY:
1018: ret = bdrv_snapshot_goto(bs, snapshot_name);
1019: if (ret)
1020: error("Could not apply snapshot '%s': %d (%s)",
1021: snapshot_name, ret, strerror(-ret));
1022: break;
1023:
1024: case SNAPSHOT_DELETE:
1025: ret = bdrv_snapshot_delete(bs, snapshot_name);
1026: if (ret)
1027: error("Could not delete snapshot '%s': %d (%s)",
1028: snapshot_name, ret, strerror(-ret));
1029: break;
1030: }
1031:
1032: /* Cleanup */
1033: bdrv_delete(bs);
1.1.1.8 ! root 1034:
! 1035: return 0;
1.1.1.5 root 1036: }
1037:
1.1.1.8 ! root 1038: static const img_cmd_t img_cmds[] = {
! 1039: #define DEF(option, callback, arg_string) \
! 1040: { option, callback },
! 1041: #include "qemu-img-cmds.h"
! 1042: #undef DEF
! 1043: #undef GEN_DOCS
! 1044: { NULL, NULL, },
! 1045: };
! 1046:
1.1 root 1047: int main(int argc, char **argv)
1048: {
1.1.1.8 ! root 1049: const img_cmd_t *cmd;
! 1050: const char *cmdname;
1.1 root 1051:
1052: bdrv_init();
1053: if (argc < 2)
1054: help();
1.1.1.8 ! root 1055: cmdname = argv[1];
1.1.1.5 root 1056: argc--; argv++;
1.1.1.8 ! root 1057:
! 1058: /* find the command */
! 1059: for(cmd = img_cmds; cmd->name != NULL; cmd++) {
! 1060: if (!strcmp(cmdname, cmd->name)) {
! 1061: return cmd->handler(argc, argv);
! 1062: }
1.1 root 1063: }
1.1.1.8 ! root 1064:
! 1065: /* not found */
! 1066: help();
1.1 root 1067: return 0;
1068: }
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