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Update version for v2.3.0-rc0 release
[qemu-kvm.git] / qemu-img.c
blob9dddfbefce6bb79c1d00ec5e4064c9cbcf496b9c
1 /*
2 * QEMU disk image utility
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
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 */
24 #include "qapi-visit.h"
25 #include "qapi/qmp-output-visitor.h"
26 #include "qapi/qmp/qjson.h"
27 #include "qemu-common.h"
28 #include "qemu/option.h"
29 #include "qemu/error-report.h"
30 #include "qemu/osdep.h"
31 #include "sysemu/sysemu.h"
32 #include "sysemu/block-backend.h"
33 #include "block/block_int.h"
34 #include "block/blockjob.h"
35 #include "block/qapi.h"
36 #include <getopt.h>
37
38 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
39 ", Copyright (c) 2004-2008 Fabrice Bellard\n"
40
41 typedef struct img_cmd_t {
42 const char *name;
43 int (*handler)(int argc, char **argv);
44 } img_cmd_t;
45
46 enum {
47 OPTION_OUTPUT = 256,
48 OPTION_BACKING_CHAIN = 257,
49 };
50
51 typedef enum OutputFormat {
52 OFORMAT_JSON,
53 OFORMAT_HUMAN,
54 } OutputFormat;
55
56 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */
57 #define BDRV_O_FLAGS BDRV_O_CACHE_WB
58 #define BDRV_DEFAULT_CACHE "writeback"
59
60 static void format_print(void *opaque, const char *name)
61 {
62 printf(" %s", name);
63 }
64
65 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
66 {
67 va_list ap;
68
69 error_printf("qemu-img: ");
70
71 va_start(ap, fmt);
72 error_vprintf(fmt, ap);
73 va_end(ap);
74
75 error_printf("\nTry 'qemu-img --help' for more information\n");
76 exit(EXIT_FAILURE);
77 }
78
79 /* Please keep in synch with qemu-img.texi */
80 static void QEMU_NORETURN help(void)
81 {
82 const char *help_msg =
83 QEMU_IMG_VERSION
84 "usage: qemu-img command [command options]\n"
85 "QEMU disk image utility\n"
86 "\n"
87 "Command syntax:\n"
88 #define DEF(option, callback, arg_string) \
89 " " arg_string "\n"
90 #include "qemu-img-cmds.h"
91 #undef DEF
92 #undef GEN_DOCS
93 "\n"
94 "Command parameters:\n"
95 " 'filename' is a disk image filename\n"
96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n"
97 " 'cache' is the cache mode used to write the output disk image, the valid\n"
98 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
99 " 'directsync' and 'unsafe' (default for convert)\n"
100 " 'src_cache' is the cache mode used to read input disk images, the valid\n"
101 " options are the same as for the 'cache' option\n"
102 " 'size' is the disk image size in bytes. Optional suffixes\n"
103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
105 " supported. 'b' is ignored.\n"
106 " 'output_filename' is the destination disk image filename\n"
107 " 'output_fmt' is the destination format\n"
108 " 'options' is a comma separated list of format specific options in a\n"
109 " name=value format. Use -o ? for an overview of the options supported by the\n"
110 " used format\n"
111 " 'snapshot_param' is param used for internal snapshot, format\n"
112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
113 " '[ID_OR_NAME]'\n"
114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n"
115 " instead\n"
116 " '-c' indicates that target image must be compressed (qcow format only)\n"
117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
118 " match exactly. The image doesn't need a working backing file before\n"
119 " rebasing in this case (useful for renaming the backing file)\n"
120 " '-h' with or without a command shows this help and lists the supported formats\n"
121 " '-p' show progress of command (only certain commands)\n"
122 " '-q' use Quiet mode - do not print any output (except errors)\n"
123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
124 " contain only zeros for qemu-img to create a sparse image during\n"
125 " conversion. If the number of bytes is 0, the source will not be scanned for\n"
126 " unallocated or zero sectors, and the destination image will always be\n"
127 " fully allocated\n"
128 " '--output' takes the format in which the output must be done (human or json)\n"
129 " '-n' skips the target volume creation (useful if the volume is created\n"
130 " prior to running qemu-img)\n"
131 "\n"
132 "Parameters to check subcommand:\n"
133 " '-r' tries to repair any inconsistencies that are found during the check.\n"
134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
135 " kinds of errors, with a higher risk of choosing the wrong fix or\n"
136 " hiding corruption that has already occurred.\n"
137 "\n"
138 "Parameters to snapshot subcommand:\n"
139 " 'snapshot' is the name of the snapshot to create, apply or delete\n"
140 " '-a' applies a snapshot (revert disk to saved state)\n"
141 " '-c' creates a snapshot\n"
142 " '-d' deletes a snapshot\n"
143 " '-l' lists all snapshots in the given image\n"
144 "\n"
145 "Parameters to compare subcommand:\n"
146 " '-f' first image format\n"
147 " '-F' second image format\n"
148 " '-s' run in Strict mode - fail on different image size or sector allocation\n";
149
150 printf("%s\nSupported formats:", help_msg);
151 bdrv_iterate_format(format_print, NULL);
152 printf("\n");
153 exit(EXIT_SUCCESS);
154 }
155
156 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
157 {
158 int ret = 0;
159 if (!quiet) {
160 va_list args;
161 va_start(args, fmt);
162 ret = vprintf(fmt, args);
163 va_end(args);
164 }
165 return ret;
166 }
167
168 #if defined(WIN32)
169 /* XXX: put correct support for win32 */
170 static int read_password(char *buf, int buf_size)
171 {
172 int c, i;
173
174 printf("Password: ");
175 fflush(stdout);
176 i = 0;
177 for(;;) {
178 c = getchar();
179 if (c < 0) {
180 buf[i] = '\0';
181 return -1;
182 } else if (c == '\n') {
183 break;
184 } else if (i < (buf_size - 1)) {
185 buf[i++] = c;
186 }
187 }
188 buf[i] = '\0';
189 return 0;
190 }
191
192 #else
193
194 #include <termios.h>
195
196 static struct termios oldtty;
197
198 static void term_exit(void)
199 {
200 tcsetattr (0, TCSANOW, &oldtty);
201 }
202
203 static void term_init(void)
204 {
205 struct termios tty;
206
207 tcgetattr (0, &tty);
208 oldtty = tty;
209
210 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
211 |INLCR|IGNCR|ICRNL|IXON);
212 tty.c_oflag |= OPOST;
213 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
214 tty.c_cflag &= ~(CSIZE|PARENB);
215 tty.c_cflag |= CS8;
216 tty.c_cc[VMIN] = 1;
217 tty.c_cc[VTIME] = 0;
218
219 tcsetattr (0, TCSANOW, &tty);
220
221 atexit(term_exit);
222 }
223
224 static int read_password(char *buf, int buf_size)
225 {
226 uint8_t ch;
227 int i, ret;
228
229 printf("password: ");
230 fflush(stdout);
231 term_init();
232 i = 0;
233 for(;;) {
234 ret = read(0, &ch, 1);
235 if (ret == -1) {
236 if (errno == EAGAIN || errno == EINTR) {
237 continue;
238 } else {
239 break;
240 }
241 } else if (ret == 0) {
242 ret = -1;
243 break;
244 } else {
245 if (ch == '\r') {
246 ret = 0;
247 break;
248 }
249 if (i < (buf_size - 1))
250 buf[i++] = ch;
251 }
252 }
253 term_exit();
254 buf[i] = '\0';
255 printf("\n");
256 return ret;
257 }
258 #endif
259
260 static int print_block_option_help(const char *filename, const char *fmt)
261 {
262 BlockDriver *drv, *proto_drv;
263 QemuOptsList *create_opts = NULL;
264 Error *local_err = NULL;
265
266 /* Find driver and parse its options */
267 drv = bdrv_find_format(fmt);
268 if (!drv) {
269 error_report("Unknown file format '%s'", fmt);
270 return 1;
271 }
272
273 create_opts = qemu_opts_append(create_opts, drv->create_opts);
274 if (filename) {
275 proto_drv = bdrv_find_protocol(filename, true, &local_err);
276 if (!proto_drv) {
277 error_report_err(local_err);
278 qemu_opts_free(create_opts);
279 return 1;
280 }
281 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
282 }
283
284 qemu_opts_print_help(create_opts);
285 qemu_opts_free(create_opts);
286 return 0;
287 }
288
289 static BlockBackend *img_open(const char *id, const char *filename,
290 const char *fmt, int flags,
291 bool require_io, bool quiet)
292 {
293 BlockBackend *blk;
294 BlockDriverState *bs;
295 char password[256];
296 Error *local_err = NULL;
297 QDict *options = NULL;
298
299 if (fmt) {
300 options = qdict_new();
301 qdict_put(options, "driver", qstring_from_str(fmt));
302 }
303
304 blk = blk_new_open(id, filename, NULL, options, flags, &local_err);
305 if (!blk) {
306 error_report("Could not open '%s': %s", filename,
307 error_get_pretty(local_err));
308 error_free(local_err);
309 goto fail;
310 }
311
312 bs = blk_bs(blk);
313 if (bdrv_is_encrypted(bs) && require_io) {
314 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
315 if (read_password(password, sizeof(password)) < 0) {
316 error_report("No password given");
317 goto fail;
318 }
319 if (bdrv_set_key(bs, password) < 0) {
320 error_report("invalid password");
321 goto fail;
322 }
323 }
324 return blk;
325 fail:
326 blk_unref(blk);
327 return NULL;
328 }
329
330 static int add_old_style_options(const char *fmt, QemuOpts *opts,
331 const char *base_filename,
332 const char *base_fmt)
333 {
334 Error *err = NULL;
335
336 if (base_filename) {
337 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err);
338 if (err) {
339 error_report("Backing file not supported for file format '%s'",
340 fmt);
341 error_free(err);
342 return -1;
343 }
344 }
345 if (base_fmt) {
346 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err);
347 if (err) {
348 error_report("Backing file format not supported for file "
349 "format '%s'", fmt);
350 error_free(err);
351 return -1;
352 }
353 }
354 return 0;
355 }
356
357 static int img_create(int argc, char **argv)
358 {
359 int c;
360 uint64_t img_size = -1;
361 const char *fmt = "raw";
362 const char *base_fmt = NULL;
363 const char *filename;
364 const char *base_filename = NULL;
365 char *options = NULL;
366 Error *local_err = NULL;
367 bool quiet = false;
368
369 for(;;) {
370 c = getopt(argc, argv, "F:b:f:he6o:q");
371 if (c == -1) {
372 break;
373 }
374 switch(c) {
375 case '?':
376 case 'h':
377 help();
378 break;
379 case 'F':
380 base_fmt = optarg;
381 break;
382 case 'b':
383 base_filename = optarg;
384 break;
385 case 'f':
386 fmt = optarg;
387 break;
388 case 'e':
389 error_report("option -e is deprecated, please use \'-o "
390 "encryption\' instead!");
391 goto fail;
392 case '6':
393 error_report("option -6 is deprecated, please use \'-o "
394 "compat6\' instead!");
395 goto fail;
396 case 'o':
397 if (!is_valid_option_list(optarg)) {
398 error_report("Invalid option list: %s", optarg);
399 goto fail;
400 }
401 if (!options) {
402 options = g_strdup(optarg);
403 } else {
404 char *old_options = options;
405 options = g_strdup_printf("%s,%s", options, optarg);
406 g_free(old_options);
407 }
408 break;
409 case 'q':
410 quiet = true;
411 break;
412 }
413 }
414
415 /* Get the filename */
416 filename = (optind < argc) ? argv[optind] : NULL;
417 if (options && has_help_option(options)) {
418 g_free(options);
419 return print_block_option_help(filename, fmt);
420 }
421
422 if (optind >= argc) {
423 error_exit("Expecting image file name");
424 }
425 optind++;
426
427 /* Get image size, if specified */
428 if (optind < argc) {
429 int64_t sval;
430 char *end;
431 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
432 if (sval < 0 || *end) {
433 if (sval == -ERANGE) {
434 error_report("Image size must be less than 8 EiB!");
435 } else {
436 error_report("Invalid image size specified! You may use k, M, "
437 "G, T, P or E suffixes for ");
438 error_report("kilobytes, megabytes, gigabytes, terabytes, "
439 "petabytes and exabytes.");
440 }
441 goto fail;
442 }
443 img_size = (uint64_t)sval;
444 }
445 if (optind != argc) {
446 error_exit("Unexpected argument: %s", argv[optind]);
447 }
448
449 bdrv_img_create(filename, fmt, base_filename, base_fmt,
450 options, img_size, BDRV_O_FLAGS, &local_err, quiet);
451 if (local_err) {
452 error_report("%s: %s", filename, error_get_pretty(local_err));
453 error_free(local_err);
454 goto fail;
455 }
456
457 g_free(options);
458 return 0;
459
460 fail:
461 g_free(options);
462 return 1;
463 }
464
465 static void dump_json_image_check(ImageCheck *check, bool quiet)
466 {
467 Error *local_err = NULL;
468 QString *str;
469 QmpOutputVisitor *ov = qmp_output_visitor_new();
470 QObject *obj;
471 visit_type_ImageCheck(qmp_output_get_visitor(ov),
472 &check, NULL, &local_err);
473 obj = qmp_output_get_qobject(ov);
474 str = qobject_to_json_pretty(obj);
475 assert(str != NULL);
476 qprintf(quiet, "%s\n", qstring_get_str(str));
477 qobject_decref(obj);
478 qmp_output_visitor_cleanup(ov);
479 QDECREF(str);
480 }
481
482 static void dump_human_image_check(ImageCheck *check, bool quiet)
483 {
484 if (!(check->corruptions || check->leaks || check->check_errors)) {
485 qprintf(quiet, "No errors were found on the image.\n");
486 } else {
487 if (check->corruptions) {
488 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n"
489 "Data may be corrupted, or further writes to the image "
490 "may corrupt it.\n",
491 check->corruptions);
492 }
493
494 if (check->leaks) {
495 qprintf(quiet,
496 "\n%" PRId64 " leaked clusters were found on the image.\n"
497 "This means waste of disk space, but no harm to data.\n",
498 check->leaks);
499 }
500
501 if (check->check_errors) {
502 qprintf(quiet,
503 "\n%" PRId64
504 " internal errors have occurred during the check.\n",
505 check->check_errors);
506 }
507 }
508
509 if (check->total_clusters != 0 && check->allocated_clusters != 0) {
510 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, "
511 "%0.2f%% fragmented, %0.2f%% compressed clusters\n",
512 check->allocated_clusters, check->total_clusters,
513 check->allocated_clusters * 100.0 / check->total_clusters,
514 check->fragmented_clusters * 100.0 / check->allocated_clusters,
515 check->compressed_clusters * 100.0 /
516 check->allocated_clusters);
517 }
518
519 if (check->image_end_offset) {
520 qprintf(quiet,
521 "Image end offset: %" PRId64 "\n", check->image_end_offset);
522 }
523 }
524
525 static int collect_image_check(BlockDriverState *bs,
526 ImageCheck *check,
527 const char *filename,
528 const char *fmt,
529 int fix)
530 {
531 int ret;
532 BdrvCheckResult result;
533
534 ret = bdrv_check(bs, &result, fix);
535 if (ret < 0) {
536 return ret;
537 }
538
539 check->filename = g_strdup(filename);
540 check->format = g_strdup(bdrv_get_format_name(bs));
541 check->check_errors = result.check_errors;
542 check->corruptions = result.corruptions;
543 check->has_corruptions = result.corruptions != 0;
544 check->leaks = result.leaks;
545 check->has_leaks = result.leaks != 0;
546 check->corruptions_fixed = result.corruptions_fixed;
547 check->has_corruptions_fixed = result.corruptions != 0;
548 check->leaks_fixed = result.leaks_fixed;
549 check->has_leaks_fixed = result.leaks != 0;
550 check->image_end_offset = result.image_end_offset;
551 check->has_image_end_offset = result.image_end_offset != 0;
552 check->total_clusters = result.bfi.total_clusters;
553 check->has_total_clusters = result.bfi.total_clusters != 0;
554 check->allocated_clusters = result.bfi.allocated_clusters;
555 check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
556 check->fragmented_clusters = result.bfi.fragmented_clusters;
557 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
558 check->compressed_clusters = result.bfi.compressed_clusters;
559 check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
560
561 return 0;
562 }
563
564 /*
565 * Checks an image for consistency. Exit codes:
566 *
567 * 0 - Check completed, image is good
568 * 1 - Check not completed because of internal errors
569 * 2 - Check completed, image is corrupted
570 * 3 - Check completed, image has leaked clusters, but is good otherwise
571 * 63 - Checks are not supported by the image format
572 */
573 static int img_check(int argc, char **argv)
574 {
575 int c, ret;
576 OutputFormat output_format = OFORMAT_HUMAN;
577 const char *filename, *fmt, *output, *cache;
578 BlockBackend *blk;
579 BlockDriverState *bs;
580 int fix = 0;
581 int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
582 ImageCheck *check;
583 bool quiet = false;
584
585 fmt = NULL;
586 output = NULL;
587 cache = BDRV_DEFAULT_CACHE;
588 for(;;) {
589 int option_index = 0;
590 static const struct option long_options[] = {
591 {"help", no_argument, 0, 'h'},
592 {"format", required_argument, 0, 'f'},
593 {"repair", required_argument, 0, 'r'},
594 {"output", required_argument, 0, OPTION_OUTPUT},
595 {0, 0, 0, 0}
596 };
597 c = getopt_long(argc, argv, "hf:r:T:q",
598 long_options, &option_index);
599 if (c == -1) {
600 break;
601 }
602 switch(c) {
603 case '?':
604 case 'h':
605 help();
606 break;
607 case 'f':
608 fmt = optarg;
609 break;
610 case 'r':
611 flags |= BDRV_O_RDWR;
612
613 if (!strcmp(optarg, "leaks")) {
614 fix = BDRV_FIX_LEAKS;
615 } else if (!strcmp(optarg, "all")) {
616 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
617 } else {
618 error_exit("Unknown option value for -r "
619 "(expecting 'leaks' or 'all'): %s", optarg);
620 }
621 break;
622 case OPTION_OUTPUT:
623 output = optarg;
624 break;
625 case 'T':
626 cache = optarg;
627 break;
628 case 'q':
629 quiet = true;
630 break;
631 }
632 }
633 if (optind != argc - 1) {
634 error_exit("Expecting one image file name");
635 }
636 filename = argv[optind++];
637
638 if (output && !strcmp(output, "json")) {
639 output_format = OFORMAT_JSON;
640 } else if (output && !strcmp(output, "human")) {
641 output_format = OFORMAT_HUMAN;
642 } else if (output) {
643 error_report("--output must be used with human or json as argument.");
644 return 1;
645 }
646
647 ret = bdrv_parse_cache_flags(cache, &flags);
648 if (ret < 0) {
649 error_report("Invalid source cache option: %s", cache);
650 return 1;
651 }
652
653 blk = img_open("image", filename, fmt, flags, true, quiet);
654 if (!blk) {
655 return 1;
656 }
657 bs = blk_bs(blk);
658
659 check = g_new0(ImageCheck, 1);
660 ret = collect_image_check(bs, check, filename, fmt, fix);
661
662 if (ret == -ENOTSUP) {
663 error_report("This image format does not support checks");
664 ret = 63;
665 goto fail;
666 }
667
668 if (check->corruptions_fixed || check->leaks_fixed) {
669 int corruptions_fixed, leaks_fixed;
670
671 leaks_fixed = check->leaks_fixed;
672 corruptions_fixed = check->corruptions_fixed;
673
674 if (output_format == OFORMAT_HUMAN) {
675 qprintf(quiet,
676 "The following inconsistencies were found and repaired:\n\n"
677 " %" PRId64 " leaked clusters\n"
678 " %" PRId64 " corruptions\n\n"
679 "Double checking the fixed image now...\n",
680 check->leaks_fixed,
681 check->corruptions_fixed);
682 }
683
684 ret = collect_image_check(bs, check, filename, fmt, 0);
685
686 check->leaks_fixed = leaks_fixed;
687 check->corruptions_fixed = corruptions_fixed;
688 }
689
690 if (!ret) {
691 switch (output_format) {
692 case OFORMAT_HUMAN:
693 dump_human_image_check(check, quiet);
694 break;
695 case OFORMAT_JSON:
696 dump_json_image_check(check, quiet);
697 break;
698 }
699 }
700
701 if (ret || check->check_errors) {
702 if (ret) {
703 error_report("Check failed: %s", strerror(-ret));
704 } else {
705 error_report("Check failed");
706 }
707 ret = 1;
708 goto fail;
709 }
710
711 if (check->corruptions) {
712 ret = 2;
713 } else if (check->leaks) {
714 ret = 3;
715 } else {
716 ret = 0;
717 }
718
719 fail:
720 qapi_free_ImageCheck(check);
721 blk_unref(blk);
722 return ret;
723 }
724
725 typedef struct CommonBlockJobCBInfo {
726 BlockDriverState *bs;
727 Error **errp;
728 } CommonBlockJobCBInfo;
729
730 static void common_block_job_cb(void *opaque, int ret)
731 {
732 CommonBlockJobCBInfo *cbi = opaque;
733
734 if (ret < 0) {
735 error_setg_errno(cbi->errp, -ret, "Block job failed");
736 }
737
738 /* Drop this block job's reference */
739 bdrv_unref(cbi->bs);
740 }
741
742 static void run_block_job(BlockJob *job, Error **errp)
743 {
744 AioContext *aio_context = bdrv_get_aio_context(job->bs);
745
746 do {
747 aio_poll(aio_context, true);
748 qemu_progress_print((float)job->offset / job->len * 100.f, 0);
749 } while (!job->ready);
750
751 block_job_complete_sync(job, errp);
752
753 /* A block job may finish instantaneously without publishing any progress,
754 * so just signal completion here */
755 qemu_progress_print(100.f, 0);
756 }
757
758 static int img_commit(int argc, char **argv)
759 {
760 int c, ret, flags;
761 const char *filename, *fmt, *cache, *base;
762 BlockBackend *blk;
763 BlockDriverState *bs, *base_bs;
764 bool progress = false, quiet = false, drop = false;
765 Error *local_err = NULL;
766 CommonBlockJobCBInfo cbi;
767
768 fmt = NULL;
769 cache = BDRV_DEFAULT_CACHE;
770 base = NULL;
771 for(;;) {
772 c = getopt(argc, argv, "f:ht:b:dpq");
773 if (c == -1) {
774 break;
775 }
776 switch(c) {
777 case '?':
778 case 'h':
779 help();
780 break;
781 case 'f':
782 fmt = optarg;
783 break;
784 case 't':
785 cache = optarg;
786 break;
787 case 'b':
788 base = optarg;
789 /* -b implies -d */
790 drop = true;
791 break;
792 case 'd':
793 drop = true;
794 break;
795 case 'p':
796 progress = true;
797 break;
798 case 'q':
799 quiet = true;
800 break;
801 }
802 }
803
804 /* Progress is not shown in Quiet mode */
805 if (quiet) {
806 progress = false;
807 }
808
809 if (optind != argc - 1) {
810 error_exit("Expecting one image file name");
811 }
812 filename = argv[optind++];
813
814 flags = BDRV_O_RDWR | BDRV_O_UNMAP;
815 ret = bdrv_parse_cache_flags(cache, &flags);
816 if (ret < 0) {
817 error_report("Invalid cache option: %s", cache);
818 return 1;
819 }
820
821 blk = img_open("image", filename, fmt, flags, true, quiet);
822 if (!blk) {
823 return 1;
824 }
825 bs = blk_bs(blk);
826
827 qemu_progress_init(progress, 1.f);
828 qemu_progress_print(0.f, 100);
829
830 if (base) {
831 base_bs = bdrv_find_backing_image(bs, base);
832 if (!base_bs) {
833 error_set(&local_err, QERR_BASE_NOT_FOUND, base);
834 goto done;
835 }
836 } else {
837 /* This is different from QMP, which by default uses the deepest file in
838 * the backing chain (i.e., the very base); however, the traditional
839 * behavior of qemu-img commit is using the immediate backing file. */
840 base_bs = bs->backing_hd;
841 if (!base_bs) {
842 error_setg(&local_err, "Image does not have a backing file");
843 goto done;
844 }
845 }
846
847 cbi = (CommonBlockJobCBInfo){
848 .errp = &local_err,
849 .bs = bs,
850 };
851
852 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT,
853 common_block_job_cb, &cbi, &local_err);
854 if (local_err) {
855 goto done;
856 }
857
858 /* The block job will swap base_bs and bs (which is not what we really want
859 * here, but okay) and unref base_bs (after the swap, i.e., the old top
860 * image). In order to still be able to empty that top image afterwards,
861 * increment the reference counter here preemptively. */
862 if (!drop) {
863 bdrv_ref(base_bs);
864 }
865
866 run_block_job(bs->job, &local_err);
867 if (local_err) {
868 goto unref_backing;
869 }
870
871 if (!drop && base_bs->drv->bdrv_make_empty) {
872 ret = base_bs->drv->bdrv_make_empty(base_bs);
873 if (ret) {
874 error_setg_errno(&local_err, -ret, "Could not empty %s",
875 filename);
876 goto unref_backing;
877 }
878 }
879
880 unref_backing:
881 if (!drop) {
882 bdrv_unref(base_bs);
883 }
884
885 done:
886 qemu_progress_end();
887
888 blk_unref(blk);
889
890 if (local_err) {
891 error_report_err(local_err);
892 return 1;
893 }
894
895 qprintf(quiet, "Image committed.\n");
896 return 0;
897 }
898
899 /*
900 * Returns true iff the first sector pointed to by 'buf' contains at least
901 * a non-NUL byte.
902 *
903 * 'pnum' is set to the number of sectors (including and immediately following
904 * the first one) that are known to be in the same allocated/unallocated state.
905 */
906 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
907 {
908 bool is_zero;
909 int i;
910
911 if (n <= 0) {
912 *pnum = 0;
913 return 0;
914 }
915 is_zero = buffer_is_zero(buf, 512);
916 for(i = 1; i < n; i++) {
917 buf += 512;
918 if (is_zero != buffer_is_zero(buf, 512)) {
919 break;
920 }
921 }
922 *pnum = i;
923 return !is_zero;
924 }
925
926 /*
927 * Like is_allocated_sectors, but if the buffer starts with a used sector,
928 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
929 * breaking up write requests for only small sparse areas.
930 */
931 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
932 int min)
933 {
934 int ret;
935 int num_checked, num_used;
936
937 if (n < min) {
938 min = n;
939 }
940
941 ret = is_allocated_sectors(buf, n, pnum);
942 if (!ret) {
943 return ret;
944 }
945
946 num_used = *pnum;
947 buf += BDRV_SECTOR_SIZE * *pnum;
948 n -= *pnum;
949 num_checked = num_used;
950
951 while (n > 0) {
952 ret = is_allocated_sectors(buf, n, pnum);
953
954 buf += BDRV_SECTOR_SIZE * *pnum;
955 n -= *pnum;
956 num_checked += *pnum;
957 if (ret) {
958 num_used = num_checked;
959 } else if (*pnum >= min) {
960 break;
961 }
962 }
963
964 *pnum = num_used;
965 return 1;
966 }
967
968 /*
969 * Compares two buffers sector by sector. Returns 0 if the first sector of both
970 * buffers matches, non-zero otherwise.
971 *
972 * pnum is set to the number of sectors (including and immediately following
973 * the first one) that are known to have the same comparison result
974 */
975 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
976 int *pnum)
977 {
978 bool res;
979 int i;
980
981 if (n <= 0) {
982 *pnum = 0;
983 return 0;
984 }
985
986 res = !!memcmp(buf1, buf2, 512);
987 for(i = 1; i < n; i++) {
988 buf1 += 512;
989 buf2 += 512;
990
991 if (!!memcmp(buf1, buf2, 512) != res) {
992 break;
993 }
994 }
995
996 *pnum = i;
997 return res;
998 }
999
1000 #define IO_BUF_SIZE (2 * 1024 * 1024)
1001
1002 static int64_t sectors_to_bytes(int64_t sectors)
1003 {
1004 return sectors << BDRV_SECTOR_BITS;
1005 }
1006
1007 static int64_t sectors_to_process(int64_t total, int64_t from)
1008 {
1009 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
1010 }
1011
1012 /*
1013 * Check if passed sectors are empty (not allocated or contain only 0 bytes)
1014 *
1015 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
1016 * data and negative value on error.
1017 *
1018 * @param blk: BlockBackend for the image
1019 * @param sect_num: Number of first sector to check
1020 * @param sect_count: Number of sectors to check
1021 * @param filename: Name of disk file we are checking (logging purpose)
1022 * @param buffer: Allocated buffer for storing read data
1023 * @param quiet: Flag for quiet mode
1024 */
1025 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num,
1026 int sect_count, const char *filename,
1027 uint8_t *buffer, bool quiet)
1028 {
1029 int pnum, ret = 0;
1030 ret = blk_read(blk, sect_num, buffer, sect_count);
1031 if (ret < 0) {
1032 error_report("Error while reading offset %" PRId64 " of %s: %s",
1033 sectors_to_bytes(sect_num), filename, strerror(-ret));
1034 return ret;
1035 }
1036 ret = is_allocated_sectors(buffer, sect_count, &pnum);
1037 if (ret || pnum != sect_count) {
1038 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1039 sectors_to_bytes(ret ? sect_num : sect_num + pnum));
1040 return 1;
1041 }
1042
1043 return 0;
1044 }
1045
1046 /*
1047 * Compares two images. Exit codes:
1048 *
1049 * 0 - Images are identical
1050 * 1 - Images differ
1051 * >1 - Error occurred
1052 */
1053 static int img_compare(int argc, char **argv)
1054 {
1055 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2;
1056 BlockBackend *blk1, *blk2;
1057 BlockDriverState *bs1, *bs2;
1058 int64_t total_sectors1, total_sectors2;
1059 uint8_t *buf1 = NULL, *buf2 = NULL;
1060 int pnum1, pnum2;
1061 int allocated1, allocated2;
1062 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */
1063 bool progress = false, quiet = false, strict = false;
1064 int flags;
1065 int64_t total_sectors;
1066 int64_t sector_num = 0;
1067 int64_t nb_sectors;
1068 int c, pnum;
1069 uint64_t progress_base;
1070
1071 cache = BDRV_DEFAULT_CACHE;
1072 for (;;) {
1073 c = getopt(argc, argv, "hf:F:T:pqs");
1074 if (c == -1) {
1075 break;
1076 }
1077 switch (c) {
1078 case '?':
1079 case 'h':
1080 help();
1081 break;
1082 case 'f':
1083 fmt1 = optarg;
1084 break;
1085 case 'F':
1086 fmt2 = optarg;
1087 break;
1088 case 'T':
1089 cache = optarg;
1090 break;
1091 case 'p':
1092 progress = true;
1093 break;
1094 case 'q':
1095 quiet = true;
1096 break;
1097 case 's':
1098 strict = true;
1099 break;
1100 }
1101 }
1102
1103 /* Progress is not shown in Quiet mode */
1104 if (quiet) {
1105 progress = false;
1106 }
1107
1108
1109 if (optind != argc - 2) {
1110 error_exit("Expecting two image file names");
1111 }
1112 filename1 = argv[optind++];
1113 filename2 = argv[optind++];
1114
1115 /* Initialize before goto out */
1116 qemu_progress_init(progress, 2.0);
1117
1118 flags = BDRV_O_FLAGS;
1119 ret = bdrv_parse_cache_flags(cache, &flags);
1120 if (ret < 0) {
1121 error_report("Invalid source cache option: %s", cache);
1122 ret = 2;
1123 goto out3;
1124 }
1125
1126 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet);
1127 if (!blk1) {
1128 ret = 2;
1129 goto out3;
1130 }
1131 bs1 = blk_bs(blk1);
1132
1133 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet);
1134 if (!blk2) {
1135 ret = 2;
1136 goto out2;
1137 }
1138 bs2 = blk_bs(blk2);
1139
1140 buf1 = blk_blockalign(blk1, IO_BUF_SIZE);
1141 buf2 = blk_blockalign(blk2, IO_BUF_SIZE);
1142 total_sectors1 = blk_nb_sectors(blk1);
1143 if (total_sectors1 < 0) {
1144 error_report("Can't get size of %s: %s",
1145 filename1, strerror(-total_sectors1));
1146 ret = 4;
1147 goto out;
1148 }
1149 total_sectors2 = blk_nb_sectors(blk2);
1150 if (total_sectors2 < 0) {
1151 error_report("Can't get size of %s: %s",
1152 filename2, strerror(-total_sectors2));
1153 ret = 4;
1154 goto out;
1155 }
1156 total_sectors = MIN(total_sectors1, total_sectors2);
1157 progress_base = MAX(total_sectors1, total_sectors2);
1158
1159 qemu_progress_print(0, 100);
1160
1161 if (strict && total_sectors1 != total_sectors2) {
1162 ret = 1;
1163 qprintf(quiet, "Strict mode: Image size mismatch!\n");
1164 goto out;
1165 }
1166
1167 for (;;) {
1168 nb_sectors = sectors_to_process(total_sectors, sector_num);
1169 if (nb_sectors <= 0) {
1170 break;
1171 }
1172 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
1173 &pnum1);
1174 if (allocated1 < 0) {
1175 ret = 3;
1176 error_report("Sector allocation test failed for %s", filename1);
1177 goto out;
1178 }
1179
1180 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
1181 &pnum2);
1182 if (allocated2 < 0) {
1183 ret = 3;
1184 error_report("Sector allocation test failed for %s", filename2);
1185 goto out;
1186 }
1187 nb_sectors = MIN(pnum1, pnum2);
1188
1189 if (allocated1 == allocated2) {
1190 if (allocated1) {
1191 ret = blk_read(blk1, sector_num, buf1, nb_sectors);
1192 if (ret < 0) {
1193 error_report("Error while reading offset %" PRId64 " of %s:"
1194 " %s", sectors_to_bytes(sector_num), filename1,
1195 strerror(-ret));
1196 ret = 4;
1197 goto out;
1198 }
1199 ret = blk_read(blk2, sector_num, buf2, nb_sectors);
1200 if (ret < 0) {
1201 error_report("Error while reading offset %" PRId64
1202 " of %s: %s", sectors_to_bytes(sector_num),
1203 filename2, strerror(-ret));
1204 ret = 4;
1205 goto out;
1206 }
1207 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum);
1208 if (ret || pnum != nb_sectors) {
1209 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1210 sectors_to_bytes(
1211 ret ? sector_num : sector_num + pnum));
1212 ret = 1;
1213 goto out;
1214 }
1215 }
1216 } else {
1217 if (strict) {
1218 ret = 1;
1219 qprintf(quiet, "Strict mode: Offset %" PRId64
1220 " allocation mismatch!\n",
1221 sectors_to_bytes(sector_num));
1222 goto out;
1223 }
1224
1225 if (allocated1) {
1226 ret = check_empty_sectors(blk1, sector_num, nb_sectors,
1227 filename1, buf1, quiet);
1228 } else {
1229 ret = check_empty_sectors(blk2, sector_num, nb_sectors,
1230 filename2, buf1, quiet);
1231 }
1232 if (ret) {
1233 if (ret < 0) {
1234 error_report("Error while reading offset %" PRId64 ": %s",
1235 sectors_to_bytes(sector_num), strerror(-ret));
1236 ret = 4;
1237 }
1238 goto out;
1239 }
1240 }
1241 sector_num += nb_sectors;
1242 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1243 }
1244
1245 if (total_sectors1 != total_sectors2) {
1246 BlockBackend *blk_over;
1247 int64_t total_sectors_over;
1248 const char *filename_over;
1249
1250 qprintf(quiet, "Warning: Image size mismatch!\n");
1251 if (total_sectors1 > total_sectors2) {
1252 total_sectors_over = total_sectors1;
1253 blk_over = blk1;
1254 filename_over = filename1;
1255 } else {
1256 total_sectors_over = total_sectors2;
1257 blk_over = blk2;
1258 filename_over = filename2;
1259 }
1260
1261 for (;;) {
1262 nb_sectors = sectors_to_process(total_sectors_over, sector_num);
1263 if (nb_sectors <= 0) {
1264 break;
1265 }
1266 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num,
1267 nb_sectors, &pnum);
1268 if (ret < 0) {
1269 ret = 3;
1270 error_report("Sector allocation test failed for %s",
1271 filename_over);
1272 goto out;
1273
1274 }
1275 nb_sectors = pnum;
1276 if (ret) {
1277 ret = check_empty_sectors(blk_over, sector_num, nb_sectors,
1278 filename_over, buf1, quiet);
1279 if (ret) {
1280 if (ret < 0) {
1281 error_report("Error while reading offset %" PRId64
1282 " of %s: %s", sectors_to_bytes(sector_num),
1283 filename_over, strerror(-ret));
1284 ret = 4;
1285 }
1286 goto out;
1287 }
1288 }
1289 sector_num += nb_sectors;
1290 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1291 }
1292 }
1293
1294 qprintf(quiet, "Images are identical.\n");
1295 ret = 0;
1296
1297 out:
1298 qemu_vfree(buf1);
1299 qemu_vfree(buf2);
1300 blk_unref(blk2);
1301 out2:
1302 blk_unref(blk1);
1303 out3:
1304 qemu_progress_end();
1305 return ret;
1306 }
1307
1308 static int img_convert(int argc, char **argv)
1309 {
1310 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create;
1311 int64_t ret = 0;
1312 int progress = 0, flags, src_flags;
1313 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename;
1314 BlockDriver *drv, *proto_drv;
1315 BlockBackend **blk = NULL, *out_blk = NULL;
1316 BlockDriverState **bs = NULL, *out_bs = NULL;
1317 int64_t total_sectors, nb_sectors, sector_num, bs_offset;
1318 int64_t *bs_sectors = NULL;
1319 uint8_t * buf = NULL;
1320 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
1321 const uint8_t *buf1;
1322 BlockDriverInfo bdi;
1323 QemuOpts *opts = NULL;
1324 QemuOptsList *create_opts = NULL;
1325 const char *out_baseimg_param;
1326 char *options = NULL;
1327 const char *snapshot_name = NULL;
1328 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
1329 bool quiet = false;
1330 Error *local_err = NULL;
1331 QemuOpts *sn_opts = NULL;
1332
1333 fmt = NULL;
1334 out_fmt = "raw";
1335 cache = "unsafe";
1336 src_cache = BDRV_DEFAULT_CACHE;
1337 out_baseimg = NULL;
1338 compress = 0;
1339 skip_create = 0;
1340 for(;;) {
1341 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn");
1342 if (c == -1) {
1343 break;
1344 }
1345 switch(c) {
1346 case '?':
1347 case 'h':
1348 help();
1349 break;
1350 case 'f':
1351 fmt = optarg;
1352 break;
1353 case 'O':
1354 out_fmt = optarg;
1355 break;
1356 case 'B':
1357 out_baseimg = optarg;
1358 break;
1359 case 'c':
1360 compress = 1;
1361 break;
1362 case 'e':
1363 error_report("option -e is deprecated, please use \'-o "
1364 "encryption\' instead!");
1365 ret = -1;
1366 goto fail_getopt;
1367 case '6':
1368 error_report("option -6 is deprecated, please use \'-o "
1369 "compat6\' instead!");
1370 ret = -1;
1371 goto fail_getopt;
1372 case 'o':
1373 if (!is_valid_option_list(optarg)) {
1374 error_report("Invalid option list: %s", optarg);
1375 ret = -1;
1376 goto fail_getopt;
1377 }
1378 if (!options) {
1379 options = g_strdup(optarg);
1380 } else {
1381 char *old_options = options;
1382 options = g_strdup_printf("%s,%s", options, optarg);
1383 g_free(old_options);
1384 }
1385 break;
1386 case 's':
1387 snapshot_name = optarg;
1388 break;
1389 case 'l':
1390 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
1391 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0);
1392 if (!sn_opts) {
1393 error_report("Failed in parsing snapshot param '%s'",
1394 optarg);
1395 ret = -1;
1396 goto fail_getopt;
1397 }
1398 } else {
1399 snapshot_name = optarg;
1400 }
1401 break;
1402 case 'S':
1403 {
1404 int64_t sval;
1405 char *end;
1406 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B);
1407 if (sval < 0 || *end) {
1408 error_report("Invalid minimum zero buffer size for sparse output specified");
1409 ret = -1;
1410 goto fail_getopt;
1411 }
1412
1413 min_sparse = sval / BDRV_SECTOR_SIZE;
1414 break;
1415 }
1416 case 'p':
1417 progress = 1;
1418 break;
1419 case 't':
1420 cache = optarg;
1421 break;
1422 case 'T':
1423 src_cache = optarg;
1424 break;
1425 case 'q':
1426 quiet = true;
1427 break;
1428 case 'n':
1429 skip_create = 1;
1430 break;
1431 }
1432 }
1433
1434 /* Initialize before goto out */
1435 if (quiet) {
1436 progress = 0;
1437 }
1438 qemu_progress_init(progress, 1.0);
1439
1440
1441 bs_n = argc - optind - 1;
1442 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL;
1443
1444 if (options && has_help_option(options)) {
1445 ret = print_block_option_help(out_filename, out_fmt);
1446 goto out;
1447 }
1448
1449 if (bs_n < 1) {
1450 error_exit("Must specify image file name");
1451 }
1452
1453
1454 if (bs_n > 1 && out_baseimg) {
1455 error_report("-B makes no sense when concatenating multiple input "
1456 "images");
1457 ret = -1;
1458 goto out;
1459 }
1460
1461 src_flags = BDRV_O_FLAGS;
1462 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
1463 if (ret < 0) {
1464 error_report("Invalid source cache option: %s", src_cache);
1465 goto out;
1466 }
1467
1468 qemu_progress_print(0, 100);
1469
1470 blk = g_new0(BlockBackend *, bs_n);
1471 bs = g_new0(BlockDriverState *, bs_n);
1472 bs_sectors = g_new(int64_t, bs_n);
1473
1474 total_sectors = 0;
1475 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1476 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i)
1477 : g_strdup("source");
1478 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags,
1479 true, quiet);
1480 g_free(id);
1481 if (!blk[bs_i]) {
1482 ret = -1;
1483 goto out;
1484 }
1485 bs[bs_i] = blk_bs(blk[bs_i]);
1486 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]);
1487 if (bs_sectors[bs_i] < 0) {
1488 error_report("Could not get size of %s: %s",
1489 argv[optind + bs_i], strerror(-bs_sectors[bs_i]));
1490 ret = -1;
1491 goto out;
1492 }
1493 total_sectors += bs_sectors[bs_i];
1494 }
1495
1496 if (sn_opts) {
1497 ret = bdrv_snapshot_load_tmp(bs[0],
1498 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
1499 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
1500 &local_err);
1501 } else if (snapshot_name != NULL) {
1502 if (bs_n > 1) {
1503 error_report("No support for concatenating multiple snapshot");
1504 ret = -1;
1505 goto out;
1506 }
1507
1508 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err);
1509 }
1510 if (local_err) {
1511 error_report("Failed to load snapshot: %s",
1512 error_get_pretty(local_err));
1513 error_free(local_err);
1514 ret = -1;
1515 goto out;
1516 }
1517
1518 /* Find driver and parse its options */
1519 drv = bdrv_find_format(out_fmt);
1520 if (!drv) {
1521 error_report("Unknown file format '%s'", out_fmt);
1522 ret = -1;
1523 goto out;
1524 }
1525
1526 proto_drv = bdrv_find_protocol(out_filename, true, &local_err);
1527 if (!proto_drv) {
1528 error_report_err(local_err);
1529 ret = -1;
1530 goto out;
1531 }
1532
1533 if (!skip_create) {
1534 if (!drv->create_opts) {
1535 error_report("Format driver '%s' does not support image creation",
1536 drv->format_name);
1537 ret = -1;
1538 goto out;
1539 }
1540
1541 if (!proto_drv->create_opts) {
1542 error_report("Protocol driver '%s' does not support image creation",
1543 proto_drv->format_name);
1544 ret = -1;
1545 goto out;
1546 }
1547
1548 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1549 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
1550
1551 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1552 if (options) {
1553 qemu_opts_do_parse(opts, options, NULL, &local_err);
1554 if (local_err) {
1555 error_report_err(local_err);
1556 ret = -1;
1557 goto out;
1558 }
1559 }
1560
1561 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512,
1562 &error_abort);
1563 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
1564 if (ret < 0) {
1565 goto out;
1566 }
1567 }
1568
1569 /* Get backing file name if -o backing_file was used */
1570 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
1571 if (out_baseimg_param) {
1572 out_baseimg = out_baseimg_param;
1573 }
1574
1575 /* Check if compression is supported */
1576 if (compress) {
1577 bool encryption =
1578 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1579 const char *preallocation =
1580 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
1581
1582 if (!drv->bdrv_write_compressed) {
1583 error_report("Compression not supported for this file format");
1584 ret = -1;
1585 goto out;
1586 }
1587
1588 if (encryption) {
1589 error_report("Compression and encryption not supported at "
1590 "the same time");
1591 ret = -1;
1592 goto out;
1593 }
1594
1595 if (preallocation
1596 && strcmp(preallocation, "off"))
1597 {
1598 error_report("Compression and preallocation not supported at "
1599 "the same time");
1600 ret = -1;
1601 goto out;
1602 }
1603 }
1604
1605 if (!skip_create) {
1606 /* Create the new image */
1607 ret = bdrv_create(drv, out_filename, opts, &local_err);
1608 if (ret < 0) {
1609 error_report("%s: error while converting %s: %s",
1610 out_filename, out_fmt, error_get_pretty(local_err));
1611 error_free(local_err);
1612 goto out;
1613 }
1614 }
1615
1616 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
1617 ret = bdrv_parse_cache_flags(cache, &flags);
1618 if (ret < 0) {
1619 error_report("Invalid cache option: %s", cache);
1620 goto out;
1621 }
1622
1623 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1624 if (!out_blk) {
1625 ret = -1;
1626 goto out;
1627 }
1628 out_bs = blk_bs(out_blk);
1629
1630 bs_i = 0;
1631 bs_offset = 0;
1632
1633 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1634 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1635 * as maximum. */
1636 bufsectors = MIN(32768,
1637 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1638 out_bs->bl.discard_alignment))
1639 );
1640
1641 buf = blk_blockalign(out_blk, bufsectors * BDRV_SECTOR_SIZE);
1642
1643 if (skip_create) {
1644 int64_t output_sectors = blk_nb_sectors(out_blk);
1645 if (output_sectors < 0) {
1646 error_report("unable to get output image length: %s",
1647 strerror(-output_sectors));
1648 ret = -1;
1649 goto out;
1650 } else if (output_sectors < total_sectors) {
1651 error_report("output file is smaller than input file");
1652 ret = -1;
1653 goto out;
1654 }
1655 }
1656
1657 cluster_sectors = 0;
1658 ret = bdrv_get_info(out_bs, &bdi);
1659 if (ret < 0) {
1660 if (compress) {
1661 error_report("could not get block driver info");
1662 goto out;
1663 }
1664 } else {
1665 compress = compress || bdi.needs_compressed_writes;
1666 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1667 }
1668
1669 if (compress) {
1670 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
1671 error_report("invalid cluster size");
1672 ret = -1;
1673 goto out;
1674 }
1675 sector_num = 0;
1676
1677 nb_sectors = total_sectors;
1678
1679 for(;;) {
1680 int64_t bs_num;
1681 int remainder;
1682 uint8_t *buf2;
1683
1684 nb_sectors = total_sectors - sector_num;
1685 if (nb_sectors <= 0)
1686 break;
1687 if (nb_sectors >= cluster_sectors)
1688 n = cluster_sectors;
1689 else
1690 n = nb_sectors;
1691
1692 bs_num = sector_num - bs_offset;
1693 assert (bs_num >= 0);
1694 remainder = n;
1695 buf2 = buf;
1696 while (remainder > 0) {
1697 int nlow;
1698 while (bs_num == bs_sectors[bs_i]) {
1699 bs_offset += bs_sectors[bs_i];
1700 bs_i++;
1701 assert (bs_i < bs_n);
1702 bs_num = 0;
1703 /* printf("changing part: sector_num=%" PRId64 ", "
1704 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
1705 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1706 }
1707 assert (bs_num < bs_sectors[bs_i]);
1708
1709 nlow = remainder > bs_sectors[bs_i] - bs_num
1710 ? bs_sectors[bs_i] - bs_num : remainder;
1711
1712 ret = blk_read(blk[bs_i], bs_num, buf2, nlow);
1713 if (ret < 0) {
1714 error_report("error while reading sector %" PRId64 ": %s",
1715 bs_num, strerror(-ret));
1716 goto out;
1717 }
1718
1719 buf2 += nlow * 512;
1720 bs_num += nlow;
1721
1722 remainder -= nlow;
1723 }
1724 assert (remainder == 0);
1725
1726 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1727 ret = blk_write_compressed(out_blk, sector_num, buf, n);
1728 if (ret != 0) {
1729 error_report("error while compressing sector %" PRId64
1730 ": %s", sector_num, strerror(-ret));
1731 goto out;
1732 }
1733 }
1734 sector_num += n;
1735 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
1736 }
1737 /* signal EOF to align */
1738 blk_write_compressed(out_blk, 0, NULL, 0);
1739 } else {
1740 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1741 bool count_allocated_sectors;
1742 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
1743
1744 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1745 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1746 if (ret < 0) {
1747 goto out;
1748 }
1749 has_zero_init = 1;
1750 }
1751
1752 sectors_to_read = total_sectors;
1753 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1754 restart:
1755 sector_num = 0; // total number of sectors converted so far
1756 sectors_read = 0;
1757 sector_num_next_status = 0;
1758
1759 for(;;) {
1760 nb_sectors = total_sectors - sector_num;
1761 if (nb_sectors <= 0) {
1762 if (count_allocated_sectors) {
1763 sectors_to_read = sectors_read;
1764 count_allocated_sectors = false;
1765 goto restart;
1766 }
1767 ret = 0;
1768 break;
1769 }
1770
1771 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1772 bs_offset += bs_sectors[bs_i];
1773 bs_i ++;
1774 assert (bs_i < bs_n);
1775 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1776 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
1777 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1778 }
1779
1780 if ((out_baseimg || has_zero_init) &&
1781 sector_num >= sector_num_next_status) {
1782 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1783 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1784 n, &n1);
1785 if (ret < 0) {
1786 error_report("error while reading block status of sector %"
1787 PRId64 ": %s", sector_num - bs_offset,
1788 strerror(-ret));
1789 goto out;
1790 }
1791 /* If the output image is zero initialized, we are not working
1792 * on a shared base and the input is zero we can skip the next
1793 * n1 sectors */
1794 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
1795 sector_num += n1;
1796 continue;
1797 }
1798 /* If the output image is being created as a copy on write
1799 * image, assume that sectors which are unallocated in the
1800 * input image are present in both the output's and input's
1801 * base images (no need to copy them). */
1802 if (out_baseimg) {
1803 if (!(ret & BDRV_BLOCK_DATA)) {
1804 sector_num += n1;
1805 continue;
1806 }
1807 /* The next 'n1' sectors are allocated in the input image.
1808 * Copy only those as they may be followed by unallocated
1809 * sectors. */
1810 nb_sectors = n1;
1811 }
1812 /* avoid redundant callouts to get_block_status */
1813 sector_num_next_status = sector_num + n1;
1814 }
1815
1816 n = MIN(nb_sectors, bufsectors);
1817
1818 /* round down request length to an aligned sector, but
1819 * do not bother doing this on short requests. They happen
1820 * when we found an all-zero area, and the next sector to
1821 * write will not be sector_num + n. */
1822 if (cluster_sectors > 0 && n >= cluster_sectors) {
1823 int64_t next_aligned_sector = (sector_num + n);
1824 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1825 if (sector_num + n > next_aligned_sector) {
1826 n = next_aligned_sector - sector_num;
1827 }
1828 }
1829
1830 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
1831
1832 sectors_read += n;
1833 if (count_allocated_sectors) {
1834 sector_num += n;
1835 continue;
1836 }
1837
1838 n1 = n;
1839 ret = blk_read(blk[bs_i], sector_num - bs_offset, buf, n);
1840 if (ret < 0) {
1841 error_report("error while reading sector %" PRId64 ": %s",
1842 sector_num - bs_offset, strerror(-ret));
1843 goto out;
1844 }
1845 /* NOTE: at the same time we convert, we do not write zero
1846 sectors to have a chance to compress the image. Ideally, we
1847 should add a specific call to have the info to go faster */
1848 buf1 = buf;
1849 while (n > 0) {
1850 if (!has_zero_init ||
1851 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
1852 ret = blk_write(out_blk, sector_num, buf1, n1);
1853 if (ret < 0) {
1854 error_report("error while writing sector %" PRId64
1855 ": %s", sector_num, strerror(-ret));
1856 goto out;
1857 }
1858 }
1859 sector_num += n1;
1860 n -= n1;
1861 buf1 += n1 * 512;
1862 }
1863 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
1864 }
1865 }
1866 out:
1867 if (!ret) {
1868 qemu_progress_print(100, 0);
1869 }
1870 qemu_progress_end();
1871 qemu_opts_del(opts);
1872 qemu_opts_free(create_opts);
1873 qemu_vfree(buf);
1874 qemu_opts_del(sn_opts);
1875 blk_unref(out_blk);
1876 g_free(bs);
1877 if (blk) {
1878 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1879 blk_unref(blk[bs_i]);
1880 }
1881 g_free(blk);
1882 }
1883 g_free(bs_sectors);
1884 fail_getopt:
1885 g_free(options);
1886
1887 if (ret) {
1888 return 1;
1889 }
1890 return 0;
1891 }
1892
1893
1894 static void dump_snapshots(BlockDriverState *bs)
1895 {
1896 QEMUSnapshotInfo *sn_tab, *sn;
1897 int nb_sns, i;
1898
1899 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1900 if (nb_sns <= 0)
1901 return;
1902 printf("Snapshot list:\n");
1903 bdrv_snapshot_dump(fprintf, stdout, NULL);
1904 printf("\n");
1905 for(i = 0; i < nb_sns; i++) {
1906 sn = &sn_tab[i];
1907 bdrv_snapshot_dump(fprintf, stdout, sn);
1908 printf("\n");
1909 }
1910 g_free(sn_tab);
1911 }
1912
1913 static void dump_json_image_info_list(ImageInfoList *list)
1914 {
1915 Error *local_err = NULL;
1916 QString *str;
1917 QmpOutputVisitor *ov = qmp_output_visitor_new();
1918 QObject *obj;
1919 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
1920 &list, NULL, &local_err);
1921 obj = qmp_output_get_qobject(ov);
1922 str = qobject_to_json_pretty(obj);
1923 assert(str != NULL);
1924 printf("%s\n", qstring_get_str(str));
1925 qobject_decref(obj);
1926 qmp_output_visitor_cleanup(ov);
1927 QDECREF(str);
1928 }
1929
1930 static void dump_json_image_info(ImageInfo *info)
1931 {
1932 Error *local_err = NULL;
1933 QString *str;
1934 QmpOutputVisitor *ov = qmp_output_visitor_new();
1935 QObject *obj;
1936 visit_type_ImageInfo(qmp_output_get_visitor(ov),
1937 &info, NULL, &local_err);
1938 obj = qmp_output_get_qobject(ov);
1939 str = qobject_to_json_pretty(obj);
1940 assert(str != NULL);
1941 printf("%s\n", qstring_get_str(str));
1942 qobject_decref(obj);
1943 qmp_output_visitor_cleanup(ov);
1944 QDECREF(str);
1945 }
1946
1947 static void dump_human_image_info_list(ImageInfoList *list)
1948 {
1949 ImageInfoList *elem;
1950 bool delim = false;
1951
1952 for (elem = list; elem; elem = elem->next) {
1953 if (delim) {
1954 printf("\n");
1955 }
1956 delim = true;
1957
1958 bdrv_image_info_dump(fprintf, stdout, elem->value);
1959 }
1960 }
1961
1962 static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1963 {
1964 return strcmp(a, b) == 0;
1965 }
1966
1967 /**
1968 * Open an image file chain and return an ImageInfoList
1969 *
1970 * @filename: topmost image filename
1971 * @fmt: topmost image format (may be NULL to autodetect)
1972 * @chain: true - enumerate entire backing file chain
1973 * false - only topmost image file
1974 *
1975 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1976 * image file. If there was an error a message will have been printed to
1977 * stderr.
1978 */
1979 static ImageInfoList *collect_image_info_list(const char *filename,
1980 const char *fmt,
1981 bool chain)
1982 {
1983 ImageInfoList *head = NULL;
1984 ImageInfoList **last = &head;
1985 GHashTable *filenames;
1986 Error *err = NULL;
1987
1988 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1989
1990 while (filename) {
1991 BlockBackend *blk;
1992 BlockDriverState *bs;
1993 ImageInfo *info;
1994 ImageInfoList *elem;
1995
1996 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
1997 error_report("Backing file '%s' creates an infinite loop.",
1998 filename);
1999 goto err;
2000 }
2001 g_hash_table_insert(filenames, (gpointer)filename, NULL);
2002
2003 blk = img_open("image", filename, fmt,
2004 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
2005 if (!blk) {
2006 goto err;
2007 }
2008 bs = blk_bs(blk);
2009
2010 bdrv_query_image_info(bs, &info, &err);
2011 if (err) {
2012 error_report_err(err);
2013 blk_unref(blk);
2014 goto err;
2015 }
2016
2017 elem = g_new0(ImageInfoList, 1);
2018 elem->value = info;
2019 *last = elem;
2020 last = &elem->next;
2021
2022 blk_unref(blk);
2023
2024 filename = fmt = NULL;
2025 if (chain) {
2026 if (info->has_full_backing_filename) {
2027 filename = info->full_backing_filename;
2028 } else if (info->has_backing_filename) {
2029 filename = info->backing_filename;
2030 }
2031 if (info->has_backing_filename_format) {
2032 fmt = info->backing_filename_format;
2033 }
2034 }
2035 }
2036 g_hash_table_destroy(filenames);
2037 return head;
2038
2039 err:
2040 qapi_free_ImageInfoList(head);
2041 g_hash_table_destroy(filenames);
2042 return NULL;
2043 }
2044
2045 static int img_info(int argc, char **argv)
2046 {
2047 int c;
2048 OutputFormat output_format = OFORMAT_HUMAN;
2049 bool chain = false;
2050 const char *filename, *fmt, *output;
2051 ImageInfoList *list;
2052
2053 fmt = NULL;
2054 output = NULL;
2055 for(;;) {
2056 int option_index = 0;
2057 static const struct option long_options[] = {
2058 {"help", no_argument, 0, 'h'},
2059 {"format", required_argument, 0, 'f'},
2060 {"output", required_argument, 0, OPTION_OUTPUT},
2061 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
2062 {0, 0, 0, 0}
2063 };
2064 c = getopt_long(argc, argv, "f:h",
2065 long_options, &option_index);
2066 if (c == -1) {
2067 break;
2068 }
2069 switch(c) {
2070 case '?':
2071 case 'h':
2072 help();
2073 break;
2074 case 'f':
2075 fmt = optarg;
2076 break;
2077 case OPTION_OUTPUT:
2078 output = optarg;
2079 break;
2080 case OPTION_BACKING_CHAIN:
2081 chain = true;
2082 break;
2083 }
2084 }
2085 if (optind != argc - 1) {
2086 error_exit("Expecting one image file name");
2087 }
2088 filename = argv[optind++];
2089
2090 if (output && !strcmp(output, "json")) {
2091 output_format = OFORMAT_JSON;
2092 } else if (output && !strcmp(output, "human")) {
2093 output_format = OFORMAT_HUMAN;
2094 } else if (output) {
2095 error_report("--output must be used with human or json as argument.");
2096 return 1;
2097 }
2098
2099 list = collect_image_info_list(filename, fmt, chain);
2100 if (!list) {
2101 return 1;
2102 }
2103
2104 switch (output_format) {
2105 case OFORMAT_HUMAN:
2106 dump_human_image_info_list(list);
2107 break;
2108 case OFORMAT_JSON:
2109 if (chain) {
2110 dump_json_image_info_list(list);
2111 } else {
2112 dump_json_image_info(list->value);
2113 }
2114 break;
2115 }
2116
2117 qapi_free_ImageInfoList(list);
2118 return 0;
2119 }
2120
2121
2122 typedef struct MapEntry {
2123 int flags;
2124 int depth;
2125 int64_t start;
2126 int64_t length;
2127 int64_t offset;
2128 BlockDriverState *bs;
2129 } MapEntry;
2130
2131 static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2132 MapEntry *next)
2133 {
2134 switch (output_format) {
2135 case OFORMAT_HUMAN:
2136 if ((e->flags & BDRV_BLOCK_DATA) &&
2137 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2138 error_report("File contains external, encrypted or compressed clusters.");
2139 exit(1);
2140 }
2141 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2142 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2143 e->start, e->length, e->offset, e->bs->filename);
2144 }
2145 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2146 * Modify the flags here to allow more coalescing.
2147 */
2148 if (next &&
2149 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2150 next->flags &= ~BDRV_BLOCK_DATA;
2151 next->flags |= BDRV_BLOCK_ZERO;
2152 }
2153 break;
2154 case OFORMAT_JSON:
2155 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2156 " \"zero\": %s, \"data\": %s",
2157 (e->start == 0 ? "[" : ",\n"),
2158 e->start, e->length, e->depth,
2159 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2160 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2161 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
2162 printf(", \"offset\": %"PRId64"", e->offset);
2163 }
2164 putchar('}');
2165
2166 if (!next) {
2167 printf("]\n");
2168 }
2169 break;
2170 }
2171 }
2172
2173 static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2174 int nb_sectors, MapEntry *e)
2175 {
2176 int64_t ret;
2177 int depth;
2178
2179 /* As an optimization, we could cache the current range of unallocated
2180 * clusters in each file of the chain, and avoid querying the same
2181 * range repeatedly.
2182 */
2183
2184 depth = 0;
2185 for (;;) {
2186 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2187 if (ret < 0) {
2188 return ret;
2189 }
2190 assert(nb_sectors);
2191 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2192 break;
2193 }
2194 bs = bs->backing_hd;
2195 if (bs == NULL) {
2196 ret = 0;
2197 break;
2198 }
2199
2200 depth++;
2201 }
2202
2203 e->start = sector_num * BDRV_SECTOR_SIZE;
2204 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2205 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2206 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2207 e->depth = depth;
2208 e->bs = bs;
2209 return 0;
2210 }
2211
2212 static int img_map(int argc, char **argv)
2213 {
2214 int c;
2215 OutputFormat output_format = OFORMAT_HUMAN;
2216 BlockBackend *blk;
2217 BlockDriverState *bs;
2218 const char *filename, *fmt, *output;
2219 int64_t length;
2220 MapEntry curr = { .length = 0 }, next;
2221 int ret = 0;
2222
2223 fmt = NULL;
2224 output = NULL;
2225 for (;;) {
2226 int option_index = 0;
2227 static const struct option long_options[] = {
2228 {"help", no_argument, 0, 'h'},
2229 {"format", required_argument, 0, 'f'},
2230 {"output", required_argument, 0, OPTION_OUTPUT},
2231 {0, 0, 0, 0}
2232 };
2233 c = getopt_long(argc, argv, "f:h",
2234 long_options, &option_index);
2235 if (c == -1) {
2236 break;
2237 }
2238 switch (c) {
2239 case '?':
2240 case 'h':
2241 help();
2242 break;
2243 case 'f':
2244 fmt = optarg;
2245 break;
2246 case OPTION_OUTPUT:
2247 output = optarg;
2248 break;
2249 }
2250 }
2251 if (optind != argc - 1) {
2252 error_exit("Expecting one image file name");
2253 }
2254 filename = argv[optind];
2255
2256 if (output && !strcmp(output, "json")) {
2257 output_format = OFORMAT_JSON;
2258 } else if (output && !strcmp(output, "human")) {
2259 output_format = OFORMAT_HUMAN;
2260 } else if (output) {
2261 error_report("--output must be used with human or json as argument.");
2262 return 1;
2263 }
2264
2265 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2266 if (!blk) {
2267 return 1;
2268 }
2269 bs = blk_bs(blk);
2270
2271 if (output_format == OFORMAT_HUMAN) {
2272 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2273 }
2274
2275 length = blk_getlength(blk);
2276 while (curr.start + curr.length < length) {
2277 int64_t nsectors_left;
2278 int64_t sector_num;
2279 int n;
2280
2281 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2282
2283 /* Probe up to 1 GiB at a time. */
2284 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2285 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2286 ret = get_block_status(bs, sector_num, n, &next);
2287
2288 if (ret < 0) {
2289 error_report("Could not read file metadata: %s", strerror(-ret));
2290 goto out;
2291 }
2292
2293 if (curr.length != 0 && curr.flags == next.flags &&
2294 curr.depth == next.depth &&
2295 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2296 curr.offset + curr.length == next.offset)) {
2297 curr.length += next.length;
2298 continue;
2299 }
2300
2301 if (curr.length > 0) {
2302 dump_map_entry(output_format, &curr, &next);
2303 }
2304 curr = next;
2305 }
2306
2307 dump_map_entry(output_format, &curr, NULL);
2308
2309 out:
2310 blk_unref(blk);
2311 return ret < 0;
2312 }
2313
2314 #define SNAPSHOT_LIST 1
2315 #define SNAPSHOT_CREATE 2
2316 #define SNAPSHOT_APPLY 3
2317 #define SNAPSHOT_DELETE 4
2318
2319 static int img_snapshot(int argc, char **argv)
2320 {
2321 BlockBackend *blk;
2322 BlockDriverState *bs;
2323 QEMUSnapshotInfo sn;
2324 char *filename, *snapshot_name = NULL;
2325 int c, ret = 0, bdrv_oflags;
2326 int action = 0;
2327 qemu_timeval tv;
2328 bool quiet = false;
2329 Error *err = NULL;
2330
2331 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
2332 /* Parse commandline parameters */
2333 for(;;) {
2334 c = getopt(argc, argv, "la:c:d:hq");
2335 if (c == -1) {
2336 break;
2337 }
2338 switch(c) {
2339 case '?':
2340 case 'h':
2341 help();
2342 return 0;
2343 case 'l':
2344 if (action) {
2345 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2346 return 0;
2347 }
2348 action = SNAPSHOT_LIST;
2349 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
2350 break;
2351 case 'a':
2352 if (action) {
2353 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2354 return 0;
2355 }
2356 action = SNAPSHOT_APPLY;
2357 snapshot_name = optarg;
2358 break;
2359 case 'c':
2360 if (action) {
2361 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2362 return 0;
2363 }
2364 action = SNAPSHOT_CREATE;
2365 snapshot_name = optarg;
2366 break;
2367 case 'd':
2368 if (action) {
2369 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2370 return 0;
2371 }
2372 action = SNAPSHOT_DELETE;
2373 snapshot_name = optarg;
2374 break;
2375 case 'q':
2376 quiet = true;
2377 break;
2378 }
2379 }
2380
2381 if (optind != argc - 1) {
2382 error_exit("Expecting one image file name");
2383 }
2384 filename = argv[optind++];
2385
2386 /* Open the image */
2387 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2388 if (!blk) {
2389 return 1;
2390 }
2391 bs = blk_bs(blk);
2392
2393 /* Perform the requested action */
2394 switch(action) {
2395 case SNAPSHOT_LIST:
2396 dump_snapshots(bs);
2397 break;
2398
2399 case SNAPSHOT_CREATE:
2400 memset(&sn, 0, sizeof(sn));
2401 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2402
2403 qemu_gettimeofday(&tv);
2404 sn.date_sec = tv.tv_sec;
2405 sn.date_nsec = tv.tv_usec * 1000;
2406
2407 ret = bdrv_snapshot_create(bs, &sn);
2408 if (ret) {
2409 error_report("Could not create snapshot '%s': %d (%s)",
2410 snapshot_name, ret, strerror(-ret));
2411 }
2412 break;
2413
2414 case SNAPSHOT_APPLY:
2415 ret = bdrv_snapshot_goto(bs, snapshot_name);
2416 if (ret) {
2417 error_report("Could not apply snapshot '%s': %d (%s)",
2418 snapshot_name, ret, strerror(-ret));
2419 }
2420 break;
2421
2422 case SNAPSHOT_DELETE:
2423 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
2424 if (err) {
2425 error_report("Could not delete snapshot '%s': (%s)",
2426 snapshot_name, error_get_pretty(err));
2427 error_free(err);
2428 ret = 1;
2429 }
2430 break;
2431 }
2432
2433 /* Cleanup */
2434 blk_unref(blk);
2435 if (ret) {
2436 return 1;
2437 }
2438 return 0;
2439 }
2440
2441 static int img_rebase(int argc, char **argv)
2442 {
2443 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
2444 BlockDriverState *bs = NULL;
2445 char *filename;
2446 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2447 int c, flags, src_flags, ret;
2448 int unsafe = 0;
2449 int progress = 0;
2450 bool quiet = false;
2451 Error *local_err = NULL;
2452
2453 /* Parse commandline parameters */
2454 fmt = NULL;
2455 cache = BDRV_DEFAULT_CACHE;
2456 src_cache = BDRV_DEFAULT_CACHE;
2457 out_baseimg = NULL;
2458 out_basefmt = NULL;
2459 for(;;) {
2460 c = getopt(argc, argv, "hf:F:b:upt:T:q");
2461 if (c == -1) {
2462 break;
2463 }
2464 switch(c) {
2465 case '?':
2466 case 'h':
2467 help();
2468 return 0;
2469 case 'f':
2470 fmt = optarg;
2471 break;
2472 case 'F':
2473 out_basefmt = optarg;
2474 break;
2475 case 'b':
2476 out_baseimg = optarg;
2477 break;
2478 case 'u':
2479 unsafe = 1;
2480 break;
2481 case 'p':
2482 progress = 1;
2483 break;
2484 case 't':
2485 cache = optarg;
2486 break;
2487 case 'T':
2488 src_cache = optarg;
2489 break;
2490 case 'q':
2491 quiet = true;
2492 break;
2493 }
2494 }
2495
2496 if (quiet) {
2497 progress = 0;
2498 }
2499
2500 if (optind != argc - 1) {
2501 error_exit("Expecting one image file name");
2502 }
2503 if (!unsafe && !out_baseimg) {
2504 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2505 }
2506 filename = argv[optind++];
2507
2508 qemu_progress_init(progress, 2.0);
2509 qemu_progress_print(0, 100);
2510
2511 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
2512 ret = bdrv_parse_cache_flags(cache, &flags);
2513 if (ret < 0) {
2514 error_report("Invalid cache option: %s", cache);
2515 goto out;
2516 }
2517
2518 src_flags = BDRV_O_FLAGS;
2519 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2520 if (ret < 0) {
2521 error_report("Invalid source cache option: %s", src_cache);
2522 goto out;
2523 }
2524
2525 /*
2526 * Open the images.
2527 *
2528 * Ignore the old backing file for unsafe rebase in case we want to correct
2529 * the reference to a renamed or moved backing file.
2530 */
2531 blk = img_open("image", filename, fmt, flags, true, quiet);
2532 if (!blk) {
2533 ret = -1;
2534 goto out;
2535 }
2536 bs = blk_bs(blk);
2537
2538 if (out_basefmt != NULL) {
2539 if (bdrv_find_format(out_basefmt) == NULL) {
2540 error_report("Invalid format name: '%s'", out_basefmt);
2541 ret = -1;
2542 goto out;
2543 }
2544 }
2545
2546 /* For safe rebasing we need to compare old and new backing file */
2547 if (!unsafe) {
2548 char backing_name[PATH_MAX];
2549 QDict *options = NULL;
2550
2551 if (bs->backing_format[0] != '\0') {
2552 options = qdict_new();
2553 qdict_put(options, "driver", qstring_from_str(bs->backing_format));
2554 }
2555
2556 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2557 blk_old_backing = blk_new_open("old_backing", backing_name, NULL,
2558 options, src_flags, &local_err);
2559 if (!blk_old_backing) {
2560 error_report("Could not open old backing file '%s': %s",
2561 backing_name, error_get_pretty(local_err));
2562 error_free(local_err);
2563 goto out;
2564 }
2565
2566 if (out_baseimg[0]) {
2567 if (out_basefmt) {
2568 options = qdict_new();
2569 qdict_put(options, "driver", qstring_from_str(out_basefmt));
2570 } else {
2571 options = NULL;
2572 }
2573
2574 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL,
2575 options, src_flags, &local_err);
2576 if (!blk_new_backing) {
2577 error_report("Could not open new backing file '%s': %s",
2578 out_baseimg, error_get_pretty(local_err));
2579 error_free(local_err);
2580 goto out;
2581 }
2582 }
2583 }
2584
2585 /*
2586 * Check each unallocated cluster in the COW file. If it is unallocated,
2587 * accesses go to the backing file. We must therefore compare this cluster
2588 * in the old and new backing file, and if they differ we need to copy it
2589 * from the old backing file into the COW file.
2590 *
2591 * If qemu-img crashes during this step, no harm is done. The content of
2592 * the image is the same as the original one at any time.
2593 */
2594 if (!unsafe) {
2595 int64_t num_sectors;
2596 int64_t old_backing_num_sectors;
2597 int64_t new_backing_num_sectors = 0;
2598 uint64_t sector;
2599 int n;
2600 uint8_t * buf_old;
2601 uint8_t * buf_new;
2602 float local_progress = 0;
2603
2604 buf_old = blk_blockalign(blk, IO_BUF_SIZE);
2605 buf_new = blk_blockalign(blk, IO_BUF_SIZE);
2606
2607 num_sectors = blk_nb_sectors(blk);
2608 if (num_sectors < 0) {
2609 error_report("Could not get size of '%s': %s",
2610 filename, strerror(-num_sectors));
2611 ret = -1;
2612 goto out;
2613 }
2614 old_backing_num_sectors = blk_nb_sectors(blk_old_backing);
2615 if (old_backing_num_sectors < 0) {
2616 char backing_name[PATH_MAX];
2617
2618 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2619 error_report("Could not get size of '%s': %s",
2620 backing_name, strerror(-old_backing_num_sectors));
2621 ret = -1;
2622 goto out;
2623 }
2624 if (blk_new_backing) {
2625 new_backing_num_sectors = blk_nb_sectors(blk_new_backing);
2626 if (new_backing_num_sectors < 0) {
2627 error_report("Could not get size of '%s': %s",
2628 out_baseimg, strerror(-new_backing_num_sectors));
2629 ret = -1;
2630 goto out;
2631 }
2632 }
2633
2634 if (num_sectors != 0) {
2635 local_progress = (float)100 /
2636 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2637 }
2638
2639 for (sector = 0; sector < num_sectors; sector += n) {
2640
2641 /* How many sectors can we handle with the next read? */
2642 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2643 n = (IO_BUF_SIZE / 512);
2644 } else {
2645 n = num_sectors - sector;
2646 }
2647
2648 /* If the cluster is allocated, we don't need to take action */
2649 ret = bdrv_is_allocated(bs, sector, n, &n);
2650 if (ret < 0) {
2651 error_report("error while reading image metadata: %s",
2652 strerror(-ret));
2653 goto out;
2654 }
2655 if (ret) {
2656 continue;
2657 }
2658
2659 /*
2660 * Read old and new backing file and take into consideration that
2661 * backing files may be smaller than the COW image.
2662 */
2663 if (sector >= old_backing_num_sectors) {
2664 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2665 } else {
2666 if (sector + n > old_backing_num_sectors) {
2667 n = old_backing_num_sectors - sector;
2668 }
2669
2670 ret = blk_read(blk_old_backing, sector, buf_old, n);
2671 if (ret < 0) {
2672 error_report("error while reading from old backing file");
2673 goto out;
2674 }
2675 }
2676
2677 if (sector >= new_backing_num_sectors || !blk_new_backing) {
2678 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2679 } else {
2680 if (sector + n > new_backing_num_sectors) {
2681 n = new_backing_num_sectors - sector;
2682 }
2683
2684 ret = blk_read(blk_new_backing, sector, buf_new, n);
2685 if (ret < 0) {
2686 error_report("error while reading from new backing file");
2687 goto out;
2688 }
2689 }
2690
2691 /* If they differ, we need to write to the COW file */
2692 uint64_t written = 0;
2693
2694 while (written < n) {
2695 int pnum;
2696
2697 if (compare_sectors(buf_old + written * 512,
2698 buf_new + written * 512, n - written, &pnum))
2699 {
2700 ret = blk_write(blk, sector + written,
2701 buf_old + written * 512, pnum);
2702 if (ret < 0) {
2703 error_report("Error while writing to COW image: %s",
2704 strerror(-ret));
2705 goto out;
2706 }
2707 }
2708
2709 written += pnum;
2710 }
2711 qemu_progress_print(local_progress, 100);
2712 }
2713
2714 qemu_vfree(buf_old);
2715 qemu_vfree(buf_new);
2716 }
2717
2718 /*
2719 * Change the backing file. All clusters that are different from the old
2720 * backing file are overwritten in the COW file now, so the visible content
2721 * doesn't change when we switch the backing file.
2722 */
2723 if (out_baseimg && *out_baseimg) {
2724 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2725 } else {
2726 ret = bdrv_change_backing_file(bs, NULL, NULL);
2727 }
2728
2729 if (ret == -ENOSPC) {
2730 error_report("Could not change the backing file to '%s': No "
2731 "space left in the file header", out_baseimg);
2732 } else if (ret < 0) {
2733 error_report("Could not change the backing file to '%s': %s",
2734 out_baseimg, strerror(-ret));
2735 }
2736
2737 qemu_progress_print(100, 0);
2738 /*
2739 * TODO At this point it is possible to check if any clusters that are
2740 * allocated in the COW file are the same in the backing file. If so, they
2741 * could be dropped from the COW file. Don't do this before switching the
2742 * backing file, in case of a crash this would lead to corruption.
2743 */
2744 out:
2745 qemu_progress_end();
2746 /* Cleanup */
2747 if (!unsafe) {
2748 blk_unref(blk_old_backing);
2749 blk_unref(blk_new_backing);
2750 }
2751
2752 blk_unref(blk);
2753 if (ret) {
2754 return 1;
2755 }
2756 return 0;
2757 }
2758
2759 static int img_resize(int argc, char **argv)
2760 {
2761 Error *err = NULL;
2762 int c, ret, relative;
2763 const char *filename, *fmt, *size;
2764 int64_t n, total_size;
2765 bool quiet = false;
2766 BlockBackend *blk = NULL;
2767 QemuOpts *param;
2768 static QemuOptsList resize_options = {
2769 .name = "resize_options",
2770 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2771 .desc = {
2772 {
2773 .name = BLOCK_OPT_SIZE,
2774 .type = QEMU_OPT_SIZE,
2775 .help = "Virtual disk size"
2776 }, {
2777 /* end of list */
2778 }
2779 },
2780 };
2781
2782 /* Remove size from argv manually so that negative numbers are not treated
2783 * as options by getopt. */
2784 if (argc < 3) {
2785 error_exit("Not enough arguments");
2786 return 1;
2787 }
2788
2789 size = argv[--argc];
2790
2791 /* Parse getopt arguments */
2792 fmt = NULL;
2793 for(;;) {
2794 c = getopt(argc, argv, "f:hq");
2795 if (c == -1) {
2796 break;
2797 }
2798 switch(c) {
2799 case '?':
2800 case 'h':
2801 help();
2802 break;
2803 case 'f':
2804 fmt = optarg;
2805 break;
2806 case 'q':
2807 quiet = true;
2808 break;
2809 }
2810 }
2811 if (optind != argc - 1) {
2812 error_exit("Expecting one image file name");
2813 }
2814 filename = argv[optind++];
2815
2816 /* Choose grow, shrink, or absolute resize mode */
2817 switch (size[0]) {
2818 case '+':
2819 relative = 1;
2820 size++;
2821 break;
2822 case '-':
2823 relative = -1;
2824 size++;
2825 break;
2826 default:
2827 relative = 0;
2828 break;
2829 }
2830
2831 /* Parse size */
2832 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
2833 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err);
2834 if (err) {
2835 error_report_err(err);
2836 ret = -1;
2837 qemu_opts_del(param);
2838 goto out;
2839 }
2840 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2841 qemu_opts_del(param);
2842
2843 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2844 true, quiet);
2845 if (!blk) {
2846 ret = -1;
2847 goto out;
2848 }
2849
2850 if (relative) {
2851 total_size = blk_getlength(blk) + n * relative;
2852 } else {
2853 total_size = n;
2854 }
2855 if (total_size <= 0) {
2856 error_report("New image size must be positive");
2857 ret = -1;
2858 goto out;
2859 }
2860
2861 ret = blk_truncate(blk, total_size);
2862 switch (ret) {
2863 case 0:
2864 qprintf(quiet, "Image resized.\n");
2865 break;
2866 case -ENOTSUP:
2867 error_report("This image does not support resize");
2868 break;
2869 case -EACCES:
2870 error_report("Image is read-only");
2871 break;
2872 default:
2873 error_report("Error resizing image (%d)", -ret);
2874 break;
2875 }
2876 out:
2877 blk_unref(blk);
2878 if (ret) {
2879 return 1;
2880 }
2881 return 0;
2882 }
2883
2884 static void amend_status_cb(BlockDriverState *bs,
2885 int64_t offset, int64_t total_work_size)
2886 {
2887 qemu_progress_print(100.f * offset / total_work_size, 0);
2888 }
2889
2890 static int img_amend(int argc, char **argv)
2891 {
2892 Error *err = NULL;
2893 int c, ret = 0;
2894 char *options = NULL;
2895 QemuOptsList *create_opts = NULL;
2896 QemuOpts *opts = NULL;
2897 const char *fmt = NULL, *filename, *cache;
2898 int flags;
2899 bool quiet = false, progress = false;
2900 BlockBackend *blk = NULL;
2901 BlockDriverState *bs = NULL;
2902
2903 cache = BDRV_DEFAULT_CACHE;
2904 for (;;) {
2905 c = getopt(argc, argv, "ho:f:t:pq");
2906 if (c == -1) {
2907 break;
2908 }
2909
2910 switch (c) {
2911 case 'h':
2912 case '?':
2913 help();
2914 break;
2915 case 'o':
2916 if (!is_valid_option_list(optarg)) {
2917 error_report("Invalid option list: %s", optarg);
2918 ret = -1;
2919 goto out;
2920 }
2921 if (!options) {
2922 options = g_strdup(optarg);
2923 } else {
2924 char *old_options = options;
2925 options = g_strdup_printf("%s,%s", options, optarg);
2926 g_free(old_options);
2927 }
2928 break;
2929 case 'f':
2930 fmt = optarg;
2931 break;
2932 case 't':
2933 cache = optarg;
2934 break;
2935 case 'p':
2936 progress = true;
2937 break;
2938 case 'q':
2939 quiet = true;
2940 break;
2941 }
2942 }
2943
2944 if (!options) {
2945 error_exit("Must specify options (-o)");
2946 }
2947
2948 if (quiet) {
2949 progress = false;
2950 }
2951 qemu_progress_init(progress, 1.0);
2952
2953 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2954 if (fmt && has_help_option(options)) {
2955 /* If a format is explicitly specified (and possibly no filename is
2956 * given), print option help here */
2957 ret = print_block_option_help(filename, fmt);
2958 goto out;
2959 }
2960
2961 if (optind != argc - 1) {
2962 error_report("Expecting one image file name");
2963 ret = -1;
2964 goto out;
2965 }
2966
2967 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2968 ret = bdrv_parse_cache_flags(cache, &flags);
2969 if (ret < 0) {
2970 error_report("Invalid cache option: %s", cache);
2971 goto out;
2972 }
2973
2974 blk = img_open("image", filename, fmt, flags, true, quiet);
2975 if (!blk) {
2976 ret = -1;
2977 goto out;
2978 }
2979 bs = blk_bs(blk);
2980
2981 fmt = bs->drv->format_name;
2982
2983 if (has_help_option(options)) {
2984 /* If the format was auto-detected, print option help here */
2985 ret = print_block_option_help(filename, fmt);
2986 goto out;
2987 }
2988
2989 if (!bs->drv->create_opts) {
2990 error_report("Format driver '%s' does not support any options to amend",
2991 fmt);
2992 ret = -1;
2993 goto out;
2994 }
2995
2996 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
2997 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
2998 if (options) {
2999 qemu_opts_do_parse(opts, options, NULL, &err);
3000 if (err) {
3001 error_report_err(err);
3002 ret = -1;
3003 goto out;
3004 }
3005 }
3006
3007 /* In case the driver does not call amend_status_cb() */
3008 qemu_progress_print(0.f, 0);
3009 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
3010 qemu_progress_print(100.f, 0);
3011 if (ret < 0) {
3012 error_report("Error while amending options: %s", strerror(-ret));
3013 goto out;
3014 }
3015
3016 out:
3017 qemu_progress_end();
3018
3019 blk_unref(blk);
3020 qemu_opts_del(opts);
3021 qemu_opts_free(create_opts);
3022 g_free(options);
3023
3024 if (ret) {
3025 return 1;
3026 }
3027 return 0;
3028 }
3029
3030 static const img_cmd_t img_cmds[] = {
3031 #define DEF(option, callback, arg_string) \
3032 { option, callback },
3033 #include "qemu-img-cmds.h"
3034 #undef DEF
3035 #undef GEN_DOCS
3036 { NULL, NULL, },
3037 };
3038
3039 int main(int argc, char **argv)
3040 {
3041 const img_cmd_t *cmd;
3042 const char *cmdname;
3043 Error *local_error = NULL;
3044 int c;
3045 static const struct option long_options[] = {
3046 {"help", no_argument, 0, 'h'},
3047 {"version", no_argument, 0, 'v'},
3048 {0, 0, 0, 0}
3049 };
3050
3051 #ifdef CONFIG_POSIX
3052 signal(SIGPIPE, SIG_IGN);
3053 #endif
3054
3055 error_set_progname(argv[0]);
3056 qemu_init_exec_dir(argv[0]);
3057
3058 if (qemu_init_main_loop(&local_error)) {
3059 error_report_err(local_error);
3060 exit(EXIT_FAILURE);
3061 }
3062
3063 bdrv_init();
3064 if (argc < 2) {
3065 error_exit("Not enough arguments");
3066 }
3067 cmdname = argv[1];
3068
3069 /* find the command */
3070 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
3071 if (!strcmp(cmdname, cmd->name)) {
3072 return cmd->handler(argc - 1, argv + 1);
3073 }
3074 }
3075
3076 c = getopt_long(argc, argv, "h", long_options, NULL);
3077
3078 if (c == 'h') {
3079 help();
3080 }
3081 if (c == 'v') {
3082 printf(QEMU_IMG_VERSION);
3083 return 0;
3084 }
3085
3086 /* not found */
3087 error_exit("Command not found: %s", cmdname);
3088 }
QEMU modified to work with kvm