target-i386: eliminate dead code and hoist common code out of "if"
[qemu.git] / qemu-img.c
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 \
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
265 /* Find driver and parse its options */
266 drv = bdrv_find_format(fmt);
267 if (!drv) {
268 error_report("Unknown file format '%s'", fmt);
269 return 1;
270 }
271
272 create_opts = qemu_opts_append(create_opts, drv->create_opts);
273 if (filename) {
274 proto_drv = bdrv_find_protocol(filename, true);
275 if (!proto_drv) {
276 error_report("Unknown protocol '%s'", filename);
277 qemu_opts_free(create_opts);
278 return 1;
279 }
280 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
281 }
282
283 qemu_opts_print_help(create_opts);
284 qemu_opts_free(create_opts);
285 return 0;
286 }
287
288 static BlockBackend *img_open(const char *id, const char *filename,
289 const char *fmt, int flags,
290 bool require_io, bool quiet)
291 {
292 BlockBackend *blk;
293 BlockDriverState *bs;
294 BlockDriver *drv;
295 char password[256];
296 Error *local_err = NULL;
297 int ret;
298
299 blk = blk_new_with_bs(id, &error_abort);
300 bs = blk_bs(blk);
301
302 if (fmt) {
303 drv = bdrv_find_format(fmt);
304 if (!drv) {
305 error_report("Unknown file format '%s'", fmt);
306 goto fail;
307 }
308 } else {
309 drv = NULL;
310 }
311
312 ret = bdrv_open(&bs, filename, NULL, NULL, flags, drv, &local_err);
313 if (ret < 0) {
314 error_report("Could not open '%s': %s", filename,
315 error_get_pretty(local_err));
316 error_free(local_err);
317 goto fail;
318 }
319
320 if (bdrv_is_encrypted(bs) && require_io) {
321 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
322 if (read_password(password, sizeof(password)) < 0) {
323 error_report("No password given");
324 goto fail;
325 }
326 if (bdrv_set_key(bs, password) < 0) {
327 error_report("invalid password");
328 goto fail;
329 }
330 }
331 return blk;
332 fail:
333 blk_unref(blk);
334 return NULL;
335 }
336
337 static int add_old_style_options(const char *fmt, QemuOpts *opts,
338 const char *base_filename,
339 const char *base_fmt)
340 {
341 if (base_filename) {
342 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) {
343 error_report("Backing file not supported for file format '%s'",
344 fmt);
345 return -1;
346 }
347 }
348 if (base_fmt) {
349 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) {
350 error_report("Backing file format not supported for file "
351 "format '%s'", fmt);
352 return -1;
353 }
354 }
355 return 0;
356 }
357
358 static int img_create(int argc, char **argv)
359 {
360 int c;
361 uint64_t img_size = -1;
362 const char *fmt = "raw";
363 const char *base_fmt = NULL;
364 const char *filename;
365 const char *base_filename = NULL;
366 char *options = NULL;
367 Error *local_err = NULL;
368 bool quiet = false;
369
370 for(;;) {
371 c = getopt(argc, argv, "F:b:f:he6o:q");
372 if (c == -1) {
373 break;
374 }
375 switch(c) {
376 case '?':
377 case 'h':
378 help();
379 break;
380 case 'F':
381 base_fmt = optarg;
382 break;
383 case 'b':
384 base_filename = optarg;
385 break;
386 case 'f':
387 fmt = optarg;
388 break;
389 case 'e':
390 error_report("option -e is deprecated, please use \'-o "
391 "encryption\' instead!");
392 goto fail;
393 case '6':
394 error_report("option -6 is deprecated, please use \'-o "
395 "compat6\' instead!");
396 goto fail;
397 case 'o':
398 if (!is_valid_option_list(optarg)) {
399 error_report("Invalid option list: %s", optarg);
400 goto fail;
401 }
402 if (!options) {
403 options = g_strdup(optarg);
404 } else {
405 char *old_options = options;
406 options = g_strdup_printf("%s,%s", options, optarg);
407 g_free(old_options);
408 }
409 break;
410 case 'q':
411 quiet = true;
412 break;
413 }
414 }
415
416 /* Get the filename */
417 filename = (optind < argc) ? argv[optind] : NULL;
418 if (options && has_help_option(options)) {
419 g_free(options);
420 return print_block_option_help(filename, fmt);
421 }
422
423 if (optind >= argc) {
424 error_exit("Expecting image file name");
425 }
426 optind++;
427
428 /* Get image size, if specified */
429 if (optind < argc) {
430 int64_t sval;
431 char *end;
432 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
433 if (sval < 0 || *end) {
434 if (sval == -ERANGE) {
435 error_report("Image size must be less than 8 EiB!");
436 } else {
437 error_report("Invalid image size specified! You may use k, M, "
438 "G, T, P or E suffixes for ");
439 error_report("kilobytes, megabytes, gigabytes, terabytes, "
440 "petabytes and exabytes.");
441 }
442 goto fail;
443 }
444 img_size = (uint64_t)sval;
445 }
446 if (optind != argc) {
447 error_exit("Unexpected argument: %s", argv[optind]);
448 }
449
450 bdrv_img_create(filename, fmt, base_filename, base_fmt,
451 options, img_size, BDRV_O_FLAGS, &local_err, quiet);
452 if (local_err) {
453 error_report("%s: %s", filename, error_get_pretty(local_err));
454 error_free(local_err);
455 goto fail;
456 }
457
458 g_free(options);
459 return 0;
460
461 fail:
462 g_free(options);
463 return 1;
464 }
465
466 static void dump_json_image_check(ImageCheck *check, bool quiet)
467 {
468 Error *local_err = NULL;
469 QString *str;
470 QmpOutputVisitor *ov = qmp_output_visitor_new();
471 QObject *obj;
472 visit_type_ImageCheck(qmp_output_get_visitor(ov),
473 &check, NULL, &local_err);
474 obj = qmp_output_get_qobject(ov);
475 str = qobject_to_json_pretty(obj);
476 assert(str != NULL);
477 qprintf(quiet, "%s\n", qstring_get_str(str));
478 qobject_decref(obj);
479 qmp_output_visitor_cleanup(ov);
480 QDECREF(str);
481 }
482
483 static void dump_human_image_check(ImageCheck *check, bool quiet)
484 {
485 if (!(check->corruptions || check->leaks || check->check_errors)) {
486 qprintf(quiet, "No errors were found on the image.\n");
487 } else {
488 if (check->corruptions) {
489 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n"
490 "Data may be corrupted, or further writes to the image "
491 "may corrupt it.\n",
492 check->corruptions);
493 }
494
495 if (check->leaks) {
496 qprintf(quiet,
497 "\n%" PRId64 " leaked clusters were found on the image.\n"
498 "This means waste of disk space, but no harm to data.\n",
499 check->leaks);
500 }
501
502 if (check->check_errors) {
503 qprintf(quiet,
504 "\n%" PRId64
505 " internal errors have occurred during the check.\n",
506 check->check_errors);
507 }
508 }
509
510 if (check->total_clusters != 0 && check->allocated_clusters != 0) {
511 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, "
512 "%0.2f%% fragmented, %0.2f%% compressed clusters\n",
513 check->allocated_clusters, check->total_clusters,
514 check->allocated_clusters * 100.0 / check->total_clusters,
515 check->fragmented_clusters * 100.0 / check->allocated_clusters,
516 check->compressed_clusters * 100.0 /
517 check->allocated_clusters);
518 }
519
520 if (check->image_end_offset) {
521 qprintf(quiet,
522 "Image end offset: %" PRId64 "\n", check->image_end_offset);
523 }
524 }
525
526 static int collect_image_check(BlockDriverState *bs,
527 ImageCheck *check,
528 const char *filename,
529 const char *fmt,
530 int fix)
531 {
532 int ret;
533 BdrvCheckResult result;
534
535 ret = bdrv_check(bs, &result, fix);
536 if (ret < 0) {
537 return ret;
538 }
539
540 check->filename = g_strdup(filename);
541 check->format = g_strdup(bdrv_get_format_name(bs));
542 check->check_errors = result.check_errors;
543 check->corruptions = result.corruptions;
544 check->has_corruptions = result.corruptions != 0;
545 check->leaks = result.leaks;
546 check->has_leaks = result.leaks != 0;
547 check->corruptions_fixed = result.corruptions_fixed;
548 check->has_corruptions_fixed = result.corruptions != 0;
549 check->leaks_fixed = result.leaks_fixed;
550 check->has_leaks_fixed = result.leaks != 0;
551 check->image_end_offset = result.image_end_offset;
552 check->has_image_end_offset = result.image_end_offset != 0;
553 check->total_clusters = result.bfi.total_clusters;
554 check->has_total_clusters = result.bfi.total_clusters != 0;
555 check->allocated_clusters = result.bfi.allocated_clusters;
556 check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
557 check->fragmented_clusters = result.bfi.fragmented_clusters;
558 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
559 check->compressed_clusters = result.bfi.compressed_clusters;
560 check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
561
562 return 0;
563 }
564
565 /*
566 * Checks an image for consistency. Exit codes:
567 *
568 * 0 - Check completed, image is good
569 * 1 - Check not completed because of internal errors
570 * 2 - Check completed, image is corrupted
571 * 3 - Check completed, image has leaked clusters, but is good otherwise
572 * 63 - Checks are not supported by the image format
573 */
574 static int img_check(int argc, char **argv)
575 {
576 int c, ret;
577 OutputFormat output_format = OFORMAT_HUMAN;
578 const char *filename, *fmt, *output, *cache;
579 BlockBackend *blk;
580 BlockDriverState *bs;
581 int fix = 0;
582 int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
583 ImageCheck *check;
584 bool quiet = false;
585
586 fmt = NULL;
587 output = NULL;
588 cache = BDRV_DEFAULT_CACHE;
589 for(;;) {
590 int option_index = 0;
591 static const struct option long_options[] = {
592 {"help", no_argument, 0, 'h'},
593 {"format", required_argument, 0, 'f'},
594 {"repair", required_argument, 0, 'r'},
595 {"output", required_argument, 0, OPTION_OUTPUT},
596 {0, 0, 0, 0}
597 };
598 c = getopt_long(argc, argv, "hf:r:T:q",
599 long_options, &option_index);
600 if (c == -1) {
601 break;
602 }
603 switch(c) {
604 case '?':
605 case 'h':
606 help();
607 break;
608 case 'f':
609 fmt = optarg;
610 break;
611 case 'r':
612 flags |= BDRV_O_RDWR;
613
614 if (!strcmp(optarg, "leaks")) {
615 fix = BDRV_FIX_LEAKS;
616 } else if (!strcmp(optarg, "all")) {
617 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
618 } else {
619 error_exit("Unknown option value for -r "
620 "(expecting 'leaks' or 'all'): %s", optarg);
621 }
622 break;
623 case OPTION_OUTPUT:
624 output = optarg;
625 break;
626 case 'T':
627 cache = optarg;
628 break;
629 case 'q':
630 quiet = true;
631 break;
632 }
633 }
634 if (optind != argc - 1) {
635 error_exit("Expecting one image file name");
636 }
637 filename = argv[optind++];
638
639 if (output && !strcmp(output, "json")) {
640 output_format = OFORMAT_JSON;
641 } else if (output && !strcmp(output, "human")) {
642 output_format = OFORMAT_HUMAN;
643 } else if (output) {
644 error_report("--output must be used with human or json as argument.");
645 return 1;
646 }
647
648 ret = bdrv_parse_cache_flags(cache, &flags);
649 if (ret < 0) {
650 error_report("Invalid source cache option: %s", cache);
651 return 1;
652 }
653
654 blk = img_open("image", filename, fmt, flags, true, quiet);
655 if (!blk) {
656 return 1;
657 }
658 bs = blk_bs(blk);
659
660 check = g_new0(ImageCheck, 1);
661 ret = collect_image_check(bs, check, filename, fmt, fix);
662
663 if (ret == -ENOTSUP) {
664 error_report("This image format does not support checks");
665 ret = 63;
666 goto fail;
667 }
668
669 if (check->corruptions_fixed || check->leaks_fixed) {
670 int corruptions_fixed, leaks_fixed;
671
672 leaks_fixed = check->leaks_fixed;
673 corruptions_fixed = check->corruptions_fixed;
674
675 if (output_format == OFORMAT_HUMAN) {
676 qprintf(quiet,
677 "The following inconsistencies were found and repaired:\n\n"
678 " %" PRId64 " leaked clusters\n"
679 " %" PRId64 " corruptions\n\n"
680 "Double checking the fixed image now...\n",
681 check->leaks_fixed,
682 check->corruptions_fixed);
683 }
684
685 ret = collect_image_check(bs, check, filename, fmt, 0);
686
687 check->leaks_fixed = leaks_fixed;
688 check->corruptions_fixed = corruptions_fixed;
689 }
690
691 if (!ret) {
692 switch (output_format) {
693 case OFORMAT_HUMAN:
694 dump_human_image_check(check, quiet);
695 break;
696 case OFORMAT_JSON:
697 dump_json_image_check(check, quiet);
698 break;
699 }
700 }
701
702 if (ret || check->check_errors) {
703 if (ret) {
704 error_report("Check failed: %s", strerror(-ret));
705 } else {
706 error_report("Check failed");
707 }
708 ret = 1;
709 goto fail;
710 }
711
712 if (check->corruptions) {
713 ret = 2;
714 } else if (check->leaks) {
715 ret = 3;
716 } else {
717 ret = 0;
718 }
719
720 fail:
721 qapi_free_ImageCheck(check);
722 blk_unref(blk);
723 return ret;
724 }
725
726 typedef struct CommonBlockJobCBInfo {
727 BlockDriverState *bs;
728 Error **errp;
729 } CommonBlockJobCBInfo;
730
731 static void common_block_job_cb(void *opaque, int ret)
732 {
733 CommonBlockJobCBInfo *cbi = opaque;
734
735 if (ret < 0) {
736 error_setg_errno(cbi->errp, -ret, "Block job failed");
737 }
738
739 /* Drop this block job's reference */
740 bdrv_unref(cbi->bs);
741 }
742
743 static void run_block_job(BlockJob *job, Error **errp)
744 {
745 AioContext *aio_context = bdrv_get_aio_context(job->bs);
746
747 do {
748 aio_poll(aio_context, true);
749 qemu_progress_print((float)job->offset / job->len * 100.f, 0);
750 } while (!job->ready);
751
752 block_job_complete_sync(job, errp);
753
754 /* A block job may finish instantaneously without publishing any progress,
755 * so just signal completion here */
756 qemu_progress_print(100.f, 0);
757 }
758
759 static int img_commit(int argc, char **argv)
760 {
761 int c, ret, flags;
762 const char *filename, *fmt, *cache, *base;
763 BlockBackend *blk;
764 BlockDriverState *bs, *base_bs;
765 bool progress = false, quiet = false, drop = false;
766 Error *local_err = NULL;
767 CommonBlockJobCBInfo cbi;
768
769 fmt = NULL;
770 cache = BDRV_DEFAULT_CACHE;
771 base = NULL;
772 for(;;) {
773 c = getopt(argc, argv, "f:ht:b:dpq");
774 if (c == -1) {
775 break;
776 }
777 switch(c) {
778 case '?':
779 case 'h':
780 help();
781 break;
782 case 'f':
783 fmt = optarg;
784 break;
785 case 't':
786 cache = optarg;
787 break;
788 case 'b':
789 base = optarg;
790 /* -b implies -d */
791 drop = true;
792 break;
793 case 'd':
794 drop = true;
795 break;
796 case 'p':
797 progress = true;
798 break;
799 case 'q':
800 quiet = true;
801 break;
802 }
803 }
804
805 /* Progress is not shown in Quiet mode */
806 if (quiet) {
807 progress = false;
808 }
809
810 if (optind != argc - 1) {
811 error_exit("Expecting one image file name");
812 }
813 filename = argv[optind++];
814
815 flags = BDRV_O_RDWR | BDRV_O_UNMAP;
816 ret = bdrv_parse_cache_flags(cache, &flags);
817 if (ret < 0) {
818 error_report("Invalid cache option: %s", cache);
819 return 1;
820 }
821
822 blk = img_open("image", filename, fmt, flags, true, quiet);
823 if (!blk) {
824 return 1;
825 }
826 bs = blk_bs(blk);
827
828 qemu_progress_init(progress, 1.f);
829 qemu_progress_print(0.f, 100);
830
831 if (base) {
832 base_bs = bdrv_find_backing_image(bs, base);
833 if (!base_bs) {
834 error_set(&local_err, QERR_BASE_NOT_FOUND, base);
835 goto done;
836 }
837 } else {
838 /* This is different from QMP, which by default uses the deepest file in
839 * the backing chain (i.e., the very base); however, the traditional
840 * behavior of qemu-img commit is using the immediate backing file. */
841 base_bs = bs->backing_hd;
842 if (!base_bs) {
843 error_setg(&local_err, "Image does not have a backing file");
844 goto done;
845 }
846 }
847
848 cbi = (CommonBlockJobCBInfo){
849 .errp = &local_err,
850 .bs = bs,
851 };
852
853 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT,
854 common_block_job_cb, &cbi, &local_err);
855 if (local_err) {
856 goto done;
857 }
858
859 /* The block job will swap base_bs and bs (which is not what we really want
860 * here, but okay) and unref base_bs (after the swap, i.e., the old top
861 * image). In order to still be able to empty that top image afterwards,
862 * increment the reference counter here preemptively. */
863 if (!drop) {
864 bdrv_ref(base_bs);
865 }
866
867 run_block_job(bs->job, &local_err);
868 if (local_err) {
869 goto unref_backing;
870 }
871
872 if (!drop && base_bs->drv->bdrv_make_empty) {
873 ret = base_bs->drv->bdrv_make_empty(base_bs);
874 if (ret) {
875 error_setg_errno(&local_err, -ret, "Could not empty %s",
876 filename);
877 goto unref_backing;
878 }
879 }
880
881 unref_backing:
882 if (!drop) {
883 bdrv_unref(base_bs);
884 }
885
886 done:
887 qemu_progress_end();
888
889 blk_unref(blk);
890
891 if (local_err) {
892 qerror_report_err(local_err);
893 error_free(local_err);
894 return 1;
895 }
896
897 qprintf(quiet, "Image committed.\n");
898 return 0;
899 }
900
901 /*
902 * Returns true iff the first sector pointed to by 'buf' contains at least
903 * a non-NUL byte.
904 *
905 * 'pnum' is set to the number of sectors (including and immediately following
906 * the first one) that are known to be in the same allocated/unallocated state.
907 */
908 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
909 {
910 bool is_zero;
911 int i;
912
913 if (n <= 0) {
914 *pnum = 0;
915 return 0;
916 }
917 is_zero = buffer_is_zero(buf, 512);
918 for(i = 1; i < n; i++) {
919 buf += 512;
920 if (is_zero != buffer_is_zero(buf, 512)) {
921 break;
922 }
923 }
924 *pnum = i;
925 return !is_zero;
926 }
927
928 /*
929 * Like is_allocated_sectors, but if the buffer starts with a used sector,
930 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
931 * breaking up write requests for only small sparse areas.
932 */
933 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
934 int min)
935 {
936 int ret;
937 int num_checked, num_used;
938
939 if (n < min) {
940 min = n;
941 }
942
943 ret = is_allocated_sectors(buf, n, pnum);
944 if (!ret) {
945 return ret;
946 }
947
948 num_used = *pnum;
949 buf += BDRV_SECTOR_SIZE * *pnum;
950 n -= *pnum;
951 num_checked = num_used;
952
953 while (n > 0) {
954 ret = is_allocated_sectors(buf, n, pnum);
955
956 buf += BDRV_SECTOR_SIZE * *pnum;
957 n -= *pnum;
958 num_checked += *pnum;
959 if (ret) {
960 num_used = num_checked;
961 } else if (*pnum >= min) {
962 break;
963 }
964 }
965
966 *pnum = num_used;
967 return 1;
968 }
969
970 /*
971 * Compares two buffers sector by sector. Returns 0 if the first sector of both
972 * buffers matches, non-zero otherwise.
973 *
974 * pnum is set to the number of sectors (including and immediately following
975 * the first one) that are known to have the same comparison result
976 */
977 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
978 int *pnum)
979 {
980 int res, i;
981
982 if (n <= 0) {
983 *pnum = 0;
984 return 0;
985 }
986
987 res = !!memcmp(buf1, buf2, 512);
988 for(i = 1; i < n; i++) {
989 buf1 += 512;
990 buf2 += 512;
991
992 if (!!memcmp(buf1, buf2, 512) != res) {
993 break;
994 }
995 }
996
997 *pnum = i;
998 return res;
999 }
1000
1001 #define IO_BUF_SIZE (2 * 1024 * 1024)
1002
1003 static int64_t sectors_to_bytes(int64_t sectors)
1004 {
1005 return sectors << BDRV_SECTOR_BITS;
1006 }
1007
1008 static int64_t sectors_to_process(int64_t total, int64_t from)
1009 {
1010 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
1011 }
1012
1013 /*
1014 * Check if passed sectors are empty (not allocated or contain only 0 bytes)
1015 *
1016 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
1017 * data and negative value on error.
1018 *
1019 * @param bs: Driver used for accessing file
1020 * @param sect_num: Number of first sector to check
1021 * @param sect_count: Number of sectors to check
1022 * @param filename: Name of disk file we are checking (logging purpose)
1023 * @param buffer: Allocated buffer for storing read data
1024 * @param quiet: Flag for quiet mode
1025 */
1026 static int check_empty_sectors(BlockDriverState *bs, int64_t sect_num,
1027 int sect_count, const char *filename,
1028 uint8_t *buffer, bool quiet)
1029 {
1030 int pnum, ret = 0;
1031 ret = bdrv_read(bs, sect_num, buffer, sect_count);
1032 if (ret < 0) {
1033 error_report("Error while reading offset %" PRId64 " of %s: %s",
1034 sectors_to_bytes(sect_num), filename, strerror(-ret));
1035 return ret;
1036 }
1037 ret = is_allocated_sectors(buffer, sect_count, &pnum);
1038 if (ret || pnum != sect_count) {
1039 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1040 sectors_to_bytes(ret ? sect_num : sect_num + pnum));
1041 return 1;
1042 }
1043
1044 return 0;
1045 }
1046
1047 /*
1048 * Compares two images. Exit codes:
1049 *
1050 * 0 - Images are identical
1051 * 1 - Images differ
1052 * >1 - Error occurred
1053 */
1054 static int img_compare(int argc, char **argv)
1055 {
1056 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2;
1057 BlockBackend *blk1, *blk2;
1058 BlockDriverState *bs1, *bs2;
1059 int64_t total_sectors1, total_sectors2;
1060 uint8_t *buf1 = NULL, *buf2 = NULL;
1061 int pnum1, pnum2;
1062 int allocated1, allocated2;
1063 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */
1064 bool progress = false, quiet = false, strict = false;
1065 int flags;
1066 int64_t total_sectors;
1067 int64_t sector_num = 0;
1068 int64_t nb_sectors;
1069 int c, pnum;
1070 uint64_t progress_base;
1071
1072 cache = BDRV_DEFAULT_CACHE;
1073 for (;;) {
1074 c = getopt(argc, argv, "hf:F:T:pqs");
1075 if (c == -1) {
1076 break;
1077 }
1078 switch (c) {
1079 case '?':
1080 case 'h':
1081 help();
1082 break;
1083 case 'f':
1084 fmt1 = optarg;
1085 break;
1086 case 'F':
1087 fmt2 = optarg;
1088 break;
1089 case 'T':
1090 cache = optarg;
1091 break;
1092 case 'p':
1093 progress = true;
1094 break;
1095 case 'q':
1096 quiet = true;
1097 break;
1098 case 's':
1099 strict = true;
1100 break;
1101 }
1102 }
1103
1104 /* Progress is not shown in Quiet mode */
1105 if (quiet) {
1106 progress = false;
1107 }
1108
1109
1110 if (optind != argc - 2) {
1111 error_exit("Expecting two image file names");
1112 }
1113 filename1 = argv[optind++];
1114 filename2 = argv[optind++];
1115
1116 /* Initialize before goto out */
1117 qemu_progress_init(progress, 2.0);
1118
1119 flags = BDRV_O_FLAGS;
1120 ret = bdrv_parse_cache_flags(cache, &flags);
1121 if (ret < 0) {
1122 error_report("Invalid source cache option: %s", cache);
1123 ret = 2;
1124 goto out3;
1125 }
1126
1127 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet);
1128 if (!blk1) {
1129 error_report("Can't open file %s", filename1);
1130 ret = 2;
1131 goto out3;
1132 }
1133 bs1 = blk_bs(blk1);
1134
1135 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet);
1136 if (!blk2) {
1137 error_report("Can't open file %s", filename2);
1138 ret = 2;
1139 goto out2;
1140 }
1141 bs2 = blk_bs(blk2);
1142
1143 buf1 = qemu_blockalign(bs1, IO_BUF_SIZE);
1144 buf2 = qemu_blockalign(bs2, IO_BUF_SIZE);
1145 total_sectors1 = bdrv_nb_sectors(bs1);
1146 if (total_sectors1 < 0) {
1147 error_report("Can't get size of %s: %s",
1148 filename1, strerror(-total_sectors1));
1149 ret = 4;
1150 goto out;
1151 }
1152 total_sectors2 = bdrv_nb_sectors(bs2);
1153 if (total_sectors2 < 0) {
1154 error_report("Can't get size of %s: %s",
1155 filename2, strerror(-total_sectors2));
1156 ret = 4;
1157 goto out;
1158 }
1159 total_sectors = MIN(total_sectors1, total_sectors2);
1160 progress_base = MAX(total_sectors1, total_sectors2);
1161
1162 qemu_progress_print(0, 100);
1163
1164 if (strict && total_sectors1 != total_sectors2) {
1165 ret = 1;
1166 qprintf(quiet, "Strict mode: Image size mismatch!\n");
1167 goto out;
1168 }
1169
1170 for (;;) {
1171 nb_sectors = sectors_to_process(total_sectors, sector_num);
1172 if (nb_sectors <= 0) {
1173 break;
1174 }
1175 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
1176 &pnum1);
1177 if (allocated1 < 0) {
1178 ret = 3;
1179 error_report("Sector allocation test failed for %s", filename1);
1180 goto out;
1181 }
1182
1183 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
1184 &pnum2);
1185 if (allocated2 < 0) {
1186 ret = 3;
1187 error_report("Sector allocation test failed for %s", filename2);
1188 goto out;
1189 }
1190 nb_sectors = MIN(pnum1, pnum2);
1191
1192 if (allocated1 == allocated2) {
1193 if (allocated1) {
1194 ret = bdrv_read(bs1, sector_num, buf1, nb_sectors);
1195 if (ret < 0) {
1196 error_report("Error while reading offset %" PRId64 " of %s:"
1197 " %s", sectors_to_bytes(sector_num), filename1,
1198 strerror(-ret));
1199 ret = 4;
1200 goto out;
1201 }
1202 ret = bdrv_read(bs2, sector_num, buf2, nb_sectors);
1203 if (ret < 0) {
1204 error_report("Error while reading offset %" PRId64
1205 " of %s: %s", sectors_to_bytes(sector_num),
1206 filename2, strerror(-ret));
1207 ret = 4;
1208 goto out;
1209 }
1210 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum);
1211 if (ret || pnum != nb_sectors) {
1212 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1213 sectors_to_bytes(
1214 ret ? sector_num : sector_num + pnum));
1215 ret = 1;
1216 goto out;
1217 }
1218 }
1219 } else {
1220 if (strict) {
1221 ret = 1;
1222 qprintf(quiet, "Strict mode: Offset %" PRId64
1223 " allocation mismatch!\n",
1224 sectors_to_bytes(sector_num));
1225 goto out;
1226 }
1227
1228 if (allocated1) {
1229 ret = check_empty_sectors(bs1, sector_num, nb_sectors,
1230 filename1, buf1, quiet);
1231 } else {
1232 ret = check_empty_sectors(bs2, sector_num, nb_sectors,
1233 filename2, buf1, quiet);
1234 }
1235 if (ret) {
1236 if (ret < 0) {
1237 error_report("Error while reading offset %" PRId64 ": %s",
1238 sectors_to_bytes(sector_num), strerror(-ret));
1239 ret = 4;
1240 }
1241 goto out;
1242 }
1243 }
1244 sector_num += nb_sectors;
1245 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1246 }
1247
1248 if (total_sectors1 != total_sectors2) {
1249 BlockDriverState *bs_over;
1250 int64_t total_sectors_over;
1251 const char *filename_over;
1252
1253 qprintf(quiet, "Warning: Image size mismatch!\n");
1254 if (total_sectors1 > total_sectors2) {
1255 total_sectors_over = total_sectors1;
1256 bs_over = bs1;
1257 filename_over = filename1;
1258 } else {
1259 total_sectors_over = total_sectors2;
1260 bs_over = bs2;
1261 filename_over = filename2;
1262 }
1263
1264 for (;;) {
1265 nb_sectors = sectors_to_process(total_sectors_over, sector_num);
1266 if (nb_sectors <= 0) {
1267 break;
1268 }
1269 ret = bdrv_is_allocated_above(bs_over, NULL, sector_num,
1270 nb_sectors, &pnum);
1271 if (ret < 0) {
1272 ret = 3;
1273 error_report("Sector allocation test failed for %s",
1274 filename_over);
1275 goto out;
1276
1277 }
1278 nb_sectors = pnum;
1279 if (ret) {
1280 ret = check_empty_sectors(bs_over, sector_num, nb_sectors,
1281 filename_over, buf1, quiet);
1282 if (ret) {
1283 if (ret < 0) {
1284 error_report("Error while reading offset %" PRId64
1285 " of %s: %s", sectors_to_bytes(sector_num),
1286 filename_over, strerror(-ret));
1287 ret = 4;
1288 }
1289 goto out;
1290 }
1291 }
1292 sector_num += nb_sectors;
1293 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1294 }
1295 }
1296
1297 qprintf(quiet, "Images are identical.\n");
1298 ret = 0;
1299
1300 out:
1301 qemu_vfree(buf1);
1302 qemu_vfree(buf2);
1303 blk_unref(blk2);
1304 out2:
1305 blk_unref(blk1);
1306 out3:
1307 qemu_progress_end();
1308 return ret;
1309 }
1310
1311 static int img_convert(int argc, char **argv)
1312 {
1313 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create;
1314 int64_t ret = 0;
1315 int progress = 0, flags, src_flags;
1316 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename;
1317 BlockDriver *drv, *proto_drv;
1318 BlockBackend **blk = NULL, *out_blk = NULL;
1319 BlockDriverState **bs = NULL, *out_bs = NULL;
1320 int64_t total_sectors, nb_sectors, sector_num, bs_offset;
1321 int64_t *bs_sectors = NULL;
1322 uint8_t * buf = NULL;
1323 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
1324 const uint8_t *buf1;
1325 BlockDriverInfo bdi;
1326 QemuOpts *opts = NULL;
1327 QemuOptsList *create_opts = NULL;
1328 const char *out_baseimg_param;
1329 char *options = NULL;
1330 const char *snapshot_name = NULL;
1331 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
1332 bool quiet = false;
1333 Error *local_err = NULL;
1334 QemuOpts *sn_opts = NULL;
1335
1336 fmt = NULL;
1337 out_fmt = "raw";
1338 cache = "unsafe";
1339 src_cache = BDRV_DEFAULT_CACHE;
1340 out_baseimg = NULL;
1341 compress = 0;
1342 skip_create = 0;
1343 for(;;) {
1344 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn");
1345 if (c == -1) {
1346 break;
1347 }
1348 switch(c) {
1349 case '?':
1350 case 'h':
1351 help();
1352 break;
1353 case 'f':
1354 fmt = optarg;
1355 break;
1356 case 'O':
1357 out_fmt = optarg;
1358 break;
1359 case 'B':
1360 out_baseimg = optarg;
1361 break;
1362 case 'c':
1363 compress = 1;
1364 break;
1365 case 'e':
1366 error_report("option -e is deprecated, please use \'-o "
1367 "encryption\' instead!");
1368 ret = -1;
1369 goto fail_getopt;
1370 case '6':
1371 error_report("option -6 is deprecated, please use \'-o "
1372 "compat6\' instead!");
1373 ret = -1;
1374 goto fail_getopt;
1375 case 'o':
1376 if (!is_valid_option_list(optarg)) {
1377 error_report("Invalid option list: %s", optarg);
1378 ret = -1;
1379 goto fail_getopt;
1380 }
1381 if (!options) {
1382 options = g_strdup(optarg);
1383 } else {
1384 char *old_options = options;
1385 options = g_strdup_printf("%s,%s", options, optarg);
1386 g_free(old_options);
1387 }
1388 break;
1389 case 's':
1390 snapshot_name = optarg;
1391 break;
1392 case 'l':
1393 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
1394 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0);
1395 if (!sn_opts) {
1396 error_report("Failed in parsing snapshot param '%s'",
1397 optarg);
1398 ret = -1;
1399 goto fail_getopt;
1400 }
1401 } else {
1402 snapshot_name = optarg;
1403 }
1404 break;
1405 case 'S':
1406 {
1407 int64_t sval;
1408 char *end;
1409 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B);
1410 if (sval < 0 || *end) {
1411 error_report("Invalid minimum zero buffer size for sparse output specified");
1412 ret = -1;
1413 goto fail_getopt;
1414 }
1415
1416 min_sparse = sval / BDRV_SECTOR_SIZE;
1417 break;
1418 }
1419 case 'p':
1420 progress = 1;
1421 break;
1422 case 't':
1423 cache = optarg;
1424 break;
1425 case 'T':
1426 src_cache = optarg;
1427 break;
1428 case 'q':
1429 quiet = true;
1430 break;
1431 case 'n':
1432 skip_create = 1;
1433 break;
1434 }
1435 }
1436
1437 /* Initialize before goto out */
1438 if (quiet) {
1439 progress = 0;
1440 }
1441 qemu_progress_init(progress, 1.0);
1442
1443
1444 bs_n = argc - optind - 1;
1445 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL;
1446
1447 if (options && has_help_option(options)) {
1448 ret = print_block_option_help(out_filename, out_fmt);
1449 goto out;
1450 }
1451
1452 if (bs_n < 1) {
1453 error_exit("Must specify image file name");
1454 }
1455
1456
1457 if (bs_n > 1 && out_baseimg) {
1458 error_report("-B makes no sense when concatenating multiple input "
1459 "images");
1460 ret = -1;
1461 goto out;
1462 }
1463
1464 src_flags = BDRV_O_FLAGS;
1465 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
1466 if (ret < 0) {
1467 error_report("Invalid source cache option: %s", src_cache);
1468 goto out;
1469 }
1470
1471 qemu_progress_print(0, 100);
1472
1473 blk = g_new0(BlockBackend *, bs_n);
1474 bs = g_new0(BlockDriverState *, bs_n);
1475 bs_sectors = g_new(int64_t, bs_n);
1476
1477 total_sectors = 0;
1478 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1479 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i)
1480 : g_strdup("source");
1481 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags,
1482 true, quiet);
1483 g_free(id);
1484 if (!blk[bs_i]) {
1485 error_report("Could not open '%s'", argv[optind + bs_i]);
1486 ret = -1;
1487 goto out;
1488 }
1489 bs[bs_i] = blk_bs(blk[bs_i]);
1490 bs_sectors[bs_i] = bdrv_nb_sectors(bs[bs_i]);
1491 if (bs_sectors[bs_i] < 0) {
1492 error_report("Could not get size of %s: %s",
1493 argv[optind + bs_i], strerror(-bs_sectors[bs_i]));
1494 ret = -1;
1495 goto out;
1496 }
1497 total_sectors += bs_sectors[bs_i];
1498 }
1499
1500 if (sn_opts) {
1501 ret = bdrv_snapshot_load_tmp(bs[0],
1502 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
1503 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
1504 &local_err);
1505 } else if (snapshot_name != NULL) {
1506 if (bs_n > 1) {
1507 error_report("No support for concatenating multiple snapshot");
1508 ret = -1;
1509 goto out;
1510 }
1511
1512 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err);
1513 }
1514 if (local_err) {
1515 error_report("Failed to load snapshot: %s",
1516 error_get_pretty(local_err));
1517 error_free(local_err);
1518 ret = -1;
1519 goto out;
1520 }
1521
1522 /* Find driver and parse its options */
1523 drv = bdrv_find_format(out_fmt);
1524 if (!drv) {
1525 error_report("Unknown file format '%s'", out_fmt);
1526 ret = -1;
1527 goto out;
1528 }
1529
1530 proto_drv = bdrv_find_protocol(out_filename, true);
1531 if (!proto_drv) {
1532 error_report("Unknown protocol '%s'", out_filename);
1533 ret = -1;
1534 goto out;
1535 }
1536
1537 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1538 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
1539
1540 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1541 if (options && qemu_opts_do_parse(opts, options, NULL)) {
1542 error_report("Invalid options for file format '%s'", out_fmt);
1543 ret = -1;
1544 goto out;
1545 }
1546
1547 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512);
1548 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
1549 if (ret < 0) {
1550 goto out;
1551 }
1552
1553 /* Get backing file name if -o backing_file was used */
1554 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
1555 if (out_baseimg_param) {
1556 out_baseimg = out_baseimg_param;
1557 }
1558
1559 /* Check if compression is supported */
1560 if (compress) {
1561 bool encryption =
1562 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1563 const char *preallocation =
1564 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
1565
1566 if (!drv->bdrv_write_compressed) {
1567 error_report("Compression not supported for this file format");
1568 ret = -1;
1569 goto out;
1570 }
1571
1572 if (encryption) {
1573 error_report("Compression and encryption not supported at "
1574 "the same time");
1575 ret = -1;
1576 goto out;
1577 }
1578
1579 if (preallocation
1580 && strcmp(preallocation, "off"))
1581 {
1582 error_report("Compression and preallocation not supported at "
1583 "the same time");
1584 ret = -1;
1585 goto out;
1586 }
1587 }
1588
1589 if (!skip_create) {
1590 /* Create the new image */
1591 ret = bdrv_create(drv, out_filename, opts, &local_err);
1592 if (ret < 0) {
1593 error_report("%s: error while converting %s: %s",
1594 out_filename, out_fmt, error_get_pretty(local_err));
1595 error_free(local_err);
1596 goto out;
1597 }
1598 }
1599
1600 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
1601 ret = bdrv_parse_cache_flags(cache, &flags);
1602 if (ret < 0) {
1603 error_report("Invalid cache option: %s", cache);
1604 goto out;
1605 }
1606
1607 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1608 if (!out_blk) {
1609 ret = -1;
1610 goto out;
1611 }
1612 out_bs = blk_bs(out_blk);
1613
1614 bs_i = 0;
1615 bs_offset = 0;
1616
1617 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1618 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1619 * as maximum. */
1620 bufsectors = MIN(32768,
1621 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1622 out_bs->bl.discard_alignment))
1623 );
1624
1625 buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE);
1626
1627 if (skip_create) {
1628 int64_t output_sectors = bdrv_nb_sectors(out_bs);
1629 if (output_sectors < 0) {
1630 error_report("unable to get output image length: %s\n",
1631 strerror(-output_sectors));
1632 ret = -1;
1633 goto out;
1634 } else if (output_sectors < total_sectors) {
1635 error_report("output file is smaller than input file");
1636 ret = -1;
1637 goto out;
1638 }
1639 }
1640
1641 cluster_sectors = 0;
1642 ret = bdrv_get_info(out_bs, &bdi);
1643 if (ret < 0) {
1644 if (compress) {
1645 error_report("could not get block driver info");
1646 goto out;
1647 }
1648 } else {
1649 compress = compress || bdi.needs_compressed_writes;
1650 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1651 }
1652
1653 if (compress) {
1654 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
1655 error_report("invalid cluster size");
1656 ret = -1;
1657 goto out;
1658 }
1659 sector_num = 0;
1660
1661 nb_sectors = total_sectors;
1662
1663 for(;;) {
1664 int64_t bs_num;
1665 int remainder;
1666 uint8_t *buf2;
1667
1668 nb_sectors = total_sectors - sector_num;
1669 if (nb_sectors <= 0)
1670 break;
1671 if (nb_sectors >= cluster_sectors)
1672 n = cluster_sectors;
1673 else
1674 n = nb_sectors;
1675
1676 bs_num = sector_num - bs_offset;
1677 assert (bs_num >= 0);
1678 remainder = n;
1679 buf2 = buf;
1680 while (remainder > 0) {
1681 int nlow;
1682 while (bs_num == bs_sectors[bs_i]) {
1683 bs_offset += bs_sectors[bs_i];
1684 bs_i++;
1685 assert (bs_i < bs_n);
1686 bs_num = 0;
1687 /* printf("changing part: sector_num=%" PRId64 ", "
1688 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
1689 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1690 }
1691 assert (bs_num < bs_sectors[bs_i]);
1692
1693 nlow = remainder > bs_sectors[bs_i] - bs_num
1694 ? bs_sectors[bs_i] - bs_num : remainder;
1695
1696 ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow);
1697 if (ret < 0) {
1698 error_report("error while reading sector %" PRId64 ": %s",
1699 bs_num, strerror(-ret));
1700 goto out;
1701 }
1702
1703 buf2 += nlow * 512;
1704 bs_num += nlow;
1705
1706 remainder -= nlow;
1707 }
1708 assert (remainder == 0);
1709
1710 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1711 ret = bdrv_write_compressed(out_bs, sector_num, buf, n);
1712 if (ret != 0) {
1713 error_report("error while compressing sector %" PRId64
1714 ": %s", sector_num, strerror(-ret));
1715 goto out;
1716 }
1717 }
1718 sector_num += n;
1719 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
1720 }
1721 /* signal EOF to align */
1722 bdrv_write_compressed(out_bs, 0, NULL, 0);
1723 } else {
1724 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1725 bool count_allocated_sectors;
1726 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
1727
1728 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1729 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1730 if (ret < 0) {
1731 goto out;
1732 }
1733 has_zero_init = 1;
1734 }
1735
1736 sectors_to_read = total_sectors;
1737 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1738 restart:
1739 sector_num = 0; // total number of sectors converted so far
1740 sectors_read = 0;
1741 sector_num_next_status = 0;
1742
1743 for(;;) {
1744 nb_sectors = total_sectors - sector_num;
1745 if (nb_sectors <= 0) {
1746 if (count_allocated_sectors) {
1747 sectors_to_read = sectors_read;
1748 count_allocated_sectors = false;
1749 goto restart;
1750 }
1751 ret = 0;
1752 break;
1753 }
1754
1755 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1756 bs_offset += bs_sectors[bs_i];
1757 bs_i ++;
1758 assert (bs_i < bs_n);
1759 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1760 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
1761 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1762 }
1763
1764 if ((out_baseimg || has_zero_init) &&
1765 sector_num >= sector_num_next_status) {
1766 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1767 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1768 n, &n1);
1769 if (ret < 0) {
1770 error_report("error while reading block status of sector %"
1771 PRId64 ": %s", sector_num - bs_offset,
1772 strerror(-ret));
1773 goto out;
1774 }
1775 /* If the output image is zero initialized, we are not working
1776 * on a shared base and the input is zero we can skip the next
1777 * n1 sectors */
1778 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
1779 sector_num += n1;
1780 continue;
1781 }
1782 /* If the output image is being created as a copy on write
1783 * image, assume that sectors which are unallocated in the
1784 * input image are present in both the output's and input's
1785 * base images (no need to copy them). */
1786 if (out_baseimg) {
1787 if (!(ret & BDRV_BLOCK_DATA)) {
1788 sector_num += n1;
1789 continue;
1790 }
1791 /* The next 'n1' sectors are allocated in the input image.
1792 * Copy only those as they may be followed by unallocated
1793 * sectors. */
1794 nb_sectors = n1;
1795 }
1796 /* avoid redundant callouts to get_block_status */
1797 sector_num_next_status = sector_num + n1;
1798 }
1799
1800 n = MIN(nb_sectors, bufsectors);
1801
1802 /* round down request length to an aligned sector, but
1803 * do not bother doing this on short requests. They happen
1804 * when we found an all-zero area, and the next sector to
1805 * write will not be sector_num + n. */
1806 if (cluster_sectors > 0 && n >= cluster_sectors) {
1807 int64_t next_aligned_sector = (sector_num + n);
1808 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1809 if (sector_num + n > next_aligned_sector) {
1810 n = next_aligned_sector - sector_num;
1811 }
1812 }
1813
1814 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
1815
1816 sectors_read += n;
1817 if (count_allocated_sectors) {
1818 sector_num += n;
1819 continue;
1820 }
1821
1822 n1 = n;
1823 ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n);
1824 if (ret < 0) {
1825 error_report("error while reading sector %" PRId64 ": %s",
1826 sector_num - bs_offset, strerror(-ret));
1827 goto out;
1828 }
1829 /* NOTE: at the same time we convert, we do not write zero
1830 sectors to have a chance to compress the image. Ideally, we
1831 should add a specific call to have the info to go faster */
1832 buf1 = buf;
1833 while (n > 0) {
1834 if (!has_zero_init ||
1835 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
1836 ret = bdrv_write(out_bs, sector_num, buf1, n1);
1837 if (ret < 0) {
1838 error_report("error while writing sector %" PRId64
1839 ": %s", sector_num, strerror(-ret));
1840 goto out;
1841 }
1842 }
1843 sector_num += n1;
1844 n -= n1;
1845 buf1 += n1 * 512;
1846 }
1847 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
1848 }
1849 }
1850 out:
1851 if (!ret) {
1852 qemu_progress_print(100, 0);
1853 }
1854 qemu_progress_end();
1855 qemu_opts_del(opts);
1856 qemu_opts_free(create_opts);
1857 qemu_vfree(buf);
1858 qemu_opts_del(sn_opts);
1859 blk_unref(out_blk);
1860 g_free(bs);
1861 if (blk) {
1862 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1863 blk_unref(blk[bs_i]);
1864 }
1865 g_free(blk);
1866 }
1867 g_free(bs_sectors);
1868 fail_getopt:
1869 g_free(options);
1870
1871 if (ret) {
1872 return 1;
1873 }
1874 return 0;
1875 }
1876
1877
1878 static void dump_snapshots(BlockDriverState *bs)
1879 {
1880 QEMUSnapshotInfo *sn_tab, *sn;
1881 int nb_sns, i;
1882
1883 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1884 if (nb_sns <= 0)
1885 return;
1886 printf("Snapshot list:\n");
1887 bdrv_snapshot_dump(fprintf, stdout, NULL);
1888 printf("\n");
1889 for(i = 0; i < nb_sns; i++) {
1890 sn = &sn_tab[i];
1891 bdrv_snapshot_dump(fprintf, stdout, sn);
1892 printf("\n");
1893 }
1894 g_free(sn_tab);
1895 }
1896
1897 static void dump_json_image_info_list(ImageInfoList *list)
1898 {
1899 Error *local_err = NULL;
1900 QString *str;
1901 QmpOutputVisitor *ov = qmp_output_visitor_new();
1902 QObject *obj;
1903 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
1904 &list, NULL, &local_err);
1905 obj = qmp_output_get_qobject(ov);
1906 str = qobject_to_json_pretty(obj);
1907 assert(str != NULL);
1908 printf("%s\n", qstring_get_str(str));
1909 qobject_decref(obj);
1910 qmp_output_visitor_cleanup(ov);
1911 QDECREF(str);
1912 }
1913
1914 static void dump_json_image_info(ImageInfo *info)
1915 {
1916 Error *local_err = NULL;
1917 QString *str;
1918 QmpOutputVisitor *ov = qmp_output_visitor_new();
1919 QObject *obj;
1920 visit_type_ImageInfo(qmp_output_get_visitor(ov),
1921 &info, NULL, &local_err);
1922 obj = qmp_output_get_qobject(ov);
1923 str = qobject_to_json_pretty(obj);
1924 assert(str != NULL);
1925 printf("%s\n", qstring_get_str(str));
1926 qobject_decref(obj);
1927 qmp_output_visitor_cleanup(ov);
1928 QDECREF(str);
1929 }
1930
1931 static void dump_human_image_info_list(ImageInfoList *list)
1932 {
1933 ImageInfoList *elem;
1934 bool delim = false;
1935
1936 for (elem = list; elem; elem = elem->next) {
1937 if (delim) {
1938 printf("\n");
1939 }
1940 delim = true;
1941
1942 bdrv_image_info_dump(fprintf, stdout, elem->value);
1943 }
1944 }
1945
1946 static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1947 {
1948 return strcmp(a, b) == 0;
1949 }
1950
1951 /**
1952 * Open an image file chain and return an ImageInfoList
1953 *
1954 * @filename: topmost image filename
1955 * @fmt: topmost image format (may be NULL to autodetect)
1956 * @chain: true - enumerate entire backing file chain
1957 * false - only topmost image file
1958 *
1959 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1960 * image file. If there was an error a message will have been printed to
1961 * stderr.
1962 */
1963 static ImageInfoList *collect_image_info_list(const char *filename,
1964 const char *fmt,
1965 bool chain)
1966 {
1967 ImageInfoList *head = NULL;
1968 ImageInfoList **last = &head;
1969 GHashTable *filenames;
1970 Error *err = NULL;
1971
1972 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1973
1974 while (filename) {
1975 BlockBackend *blk;
1976 BlockDriverState *bs;
1977 ImageInfo *info;
1978 ImageInfoList *elem;
1979
1980 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
1981 error_report("Backing file '%s' creates an infinite loop.",
1982 filename);
1983 goto err;
1984 }
1985 g_hash_table_insert(filenames, (gpointer)filename, NULL);
1986
1987 blk = img_open("image", filename, fmt,
1988 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
1989 if (!blk) {
1990 goto err;
1991 }
1992 bs = blk_bs(blk);
1993
1994 bdrv_query_image_info(bs, &info, &err);
1995 if (err) {
1996 error_report("%s", error_get_pretty(err));
1997 error_free(err);
1998 blk_unref(blk);
1999 goto err;
2000 }
2001
2002 elem = g_new0(ImageInfoList, 1);
2003 elem->value = info;
2004 *last = elem;
2005 last = &elem->next;
2006
2007 blk_unref(blk);
2008
2009 filename = fmt = NULL;
2010 if (chain) {
2011 if (info->has_full_backing_filename) {
2012 filename = info->full_backing_filename;
2013 } else if (info->has_backing_filename) {
2014 filename = info->backing_filename;
2015 }
2016 if (info->has_backing_filename_format) {
2017 fmt = info->backing_filename_format;
2018 }
2019 }
2020 }
2021 g_hash_table_destroy(filenames);
2022 return head;
2023
2024 err:
2025 qapi_free_ImageInfoList(head);
2026 g_hash_table_destroy(filenames);
2027 return NULL;
2028 }
2029
2030 static int img_info(int argc, char **argv)
2031 {
2032 int c;
2033 OutputFormat output_format = OFORMAT_HUMAN;
2034 bool chain = false;
2035 const char *filename, *fmt, *output;
2036 ImageInfoList *list;
2037
2038 fmt = NULL;
2039 output = NULL;
2040 for(;;) {
2041 int option_index = 0;
2042 static const struct option long_options[] = {
2043 {"help", no_argument, 0, 'h'},
2044 {"format", required_argument, 0, 'f'},
2045 {"output", required_argument, 0, OPTION_OUTPUT},
2046 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
2047 {0, 0, 0, 0}
2048 };
2049 c = getopt_long(argc, argv, "f:h",
2050 long_options, &option_index);
2051 if (c == -1) {
2052 break;
2053 }
2054 switch(c) {
2055 case '?':
2056 case 'h':
2057 help();
2058 break;
2059 case 'f':
2060 fmt = optarg;
2061 break;
2062 case OPTION_OUTPUT:
2063 output = optarg;
2064 break;
2065 case OPTION_BACKING_CHAIN:
2066 chain = true;
2067 break;
2068 }
2069 }
2070 if (optind != argc - 1) {
2071 error_exit("Expecting one image file name");
2072 }
2073 filename = argv[optind++];
2074
2075 if (output && !strcmp(output, "json")) {
2076 output_format = OFORMAT_JSON;
2077 } else if (output && !strcmp(output, "human")) {
2078 output_format = OFORMAT_HUMAN;
2079 } else if (output) {
2080 error_report("--output must be used with human or json as argument.");
2081 return 1;
2082 }
2083
2084 list = collect_image_info_list(filename, fmt, chain);
2085 if (!list) {
2086 return 1;
2087 }
2088
2089 switch (output_format) {
2090 case OFORMAT_HUMAN:
2091 dump_human_image_info_list(list);
2092 break;
2093 case OFORMAT_JSON:
2094 if (chain) {
2095 dump_json_image_info_list(list);
2096 } else {
2097 dump_json_image_info(list->value);
2098 }
2099 break;
2100 }
2101
2102 qapi_free_ImageInfoList(list);
2103 return 0;
2104 }
2105
2106
2107 typedef struct MapEntry {
2108 int flags;
2109 int depth;
2110 int64_t start;
2111 int64_t length;
2112 int64_t offset;
2113 BlockDriverState *bs;
2114 } MapEntry;
2115
2116 static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2117 MapEntry *next)
2118 {
2119 switch (output_format) {
2120 case OFORMAT_HUMAN:
2121 if ((e->flags & BDRV_BLOCK_DATA) &&
2122 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2123 error_report("File contains external, encrypted or compressed clusters.");
2124 exit(1);
2125 }
2126 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2127 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2128 e->start, e->length, e->offset, e->bs->filename);
2129 }
2130 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2131 * Modify the flags here to allow more coalescing.
2132 */
2133 if (next &&
2134 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2135 next->flags &= ~BDRV_BLOCK_DATA;
2136 next->flags |= BDRV_BLOCK_ZERO;
2137 }
2138 break;
2139 case OFORMAT_JSON:
2140 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2141 " \"zero\": %s, \"data\": %s",
2142 (e->start == 0 ? "[" : ",\n"),
2143 e->start, e->length, e->depth,
2144 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2145 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2146 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
2147 printf(", \"offset\": %"PRId64"", e->offset);
2148 }
2149 putchar('}');
2150
2151 if (!next) {
2152 printf("]\n");
2153 }
2154 break;
2155 }
2156 }
2157
2158 static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2159 int nb_sectors, MapEntry *e)
2160 {
2161 int64_t ret;
2162 int depth;
2163
2164 /* As an optimization, we could cache the current range of unallocated
2165 * clusters in each file of the chain, and avoid querying the same
2166 * range repeatedly.
2167 */
2168
2169 depth = 0;
2170 for (;;) {
2171 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2172 if (ret < 0) {
2173 return ret;
2174 }
2175 assert(nb_sectors);
2176 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2177 break;
2178 }
2179 bs = bs->backing_hd;
2180 if (bs == NULL) {
2181 ret = 0;
2182 break;
2183 }
2184
2185 depth++;
2186 }
2187
2188 e->start = sector_num * BDRV_SECTOR_SIZE;
2189 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2190 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2191 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2192 e->depth = depth;
2193 e->bs = bs;
2194 return 0;
2195 }
2196
2197 static int img_map(int argc, char **argv)
2198 {
2199 int c;
2200 OutputFormat output_format = OFORMAT_HUMAN;
2201 BlockBackend *blk;
2202 BlockDriverState *bs;
2203 const char *filename, *fmt, *output;
2204 int64_t length;
2205 MapEntry curr = { .length = 0 }, next;
2206 int ret = 0;
2207
2208 fmt = NULL;
2209 output = NULL;
2210 for (;;) {
2211 int option_index = 0;
2212 static const struct option long_options[] = {
2213 {"help", no_argument, 0, 'h'},
2214 {"format", required_argument, 0, 'f'},
2215 {"output", required_argument, 0, OPTION_OUTPUT},
2216 {0, 0, 0, 0}
2217 };
2218 c = getopt_long(argc, argv, "f:h",
2219 long_options, &option_index);
2220 if (c == -1) {
2221 break;
2222 }
2223 switch (c) {
2224 case '?':
2225 case 'h':
2226 help();
2227 break;
2228 case 'f':
2229 fmt = optarg;
2230 break;
2231 case OPTION_OUTPUT:
2232 output = optarg;
2233 break;
2234 }
2235 }
2236 if (optind != argc - 1) {
2237 error_exit("Expecting one image file name");
2238 }
2239 filename = argv[optind];
2240
2241 if (output && !strcmp(output, "json")) {
2242 output_format = OFORMAT_JSON;
2243 } else if (output && !strcmp(output, "human")) {
2244 output_format = OFORMAT_HUMAN;
2245 } else if (output) {
2246 error_report("--output must be used with human or json as argument.");
2247 return 1;
2248 }
2249
2250 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2251 if (!blk) {
2252 return 1;
2253 }
2254 bs = blk_bs(blk);
2255
2256 if (output_format == OFORMAT_HUMAN) {
2257 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2258 }
2259
2260 length = bdrv_getlength(bs);
2261 while (curr.start + curr.length < length) {
2262 int64_t nsectors_left;
2263 int64_t sector_num;
2264 int n;
2265
2266 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2267
2268 /* Probe up to 1 GiB at a time. */
2269 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2270 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2271 ret = get_block_status(bs, sector_num, n, &next);
2272
2273 if (ret < 0) {
2274 error_report("Could not read file metadata: %s", strerror(-ret));
2275 goto out;
2276 }
2277
2278 if (curr.length != 0 && curr.flags == next.flags &&
2279 curr.depth == next.depth &&
2280 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2281 curr.offset + curr.length == next.offset)) {
2282 curr.length += next.length;
2283 continue;
2284 }
2285
2286 if (curr.length > 0) {
2287 dump_map_entry(output_format, &curr, &next);
2288 }
2289 curr = next;
2290 }
2291
2292 dump_map_entry(output_format, &curr, NULL);
2293
2294 out:
2295 blk_unref(blk);
2296 return ret < 0;
2297 }
2298
2299 #define SNAPSHOT_LIST 1
2300 #define SNAPSHOT_CREATE 2
2301 #define SNAPSHOT_APPLY 3
2302 #define SNAPSHOT_DELETE 4
2303
2304 static int img_snapshot(int argc, char **argv)
2305 {
2306 BlockBackend *blk;
2307 BlockDriverState *bs;
2308 QEMUSnapshotInfo sn;
2309 char *filename, *snapshot_name = NULL;
2310 int c, ret = 0, bdrv_oflags;
2311 int action = 0;
2312 qemu_timeval tv;
2313 bool quiet = false;
2314 Error *err = NULL;
2315
2316 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
2317 /* Parse commandline parameters */
2318 for(;;) {
2319 c = getopt(argc, argv, "la:c:d:hq");
2320 if (c == -1) {
2321 break;
2322 }
2323 switch(c) {
2324 case '?':
2325 case 'h':
2326 help();
2327 return 0;
2328 case 'l':
2329 if (action) {
2330 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2331 return 0;
2332 }
2333 action = SNAPSHOT_LIST;
2334 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
2335 break;
2336 case 'a':
2337 if (action) {
2338 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2339 return 0;
2340 }
2341 action = SNAPSHOT_APPLY;
2342 snapshot_name = optarg;
2343 break;
2344 case 'c':
2345 if (action) {
2346 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2347 return 0;
2348 }
2349 action = SNAPSHOT_CREATE;
2350 snapshot_name = optarg;
2351 break;
2352 case 'd':
2353 if (action) {
2354 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2355 return 0;
2356 }
2357 action = SNAPSHOT_DELETE;
2358 snapshot_name = optarg;
2359 break;
2360 case 'q':
2361 quiet = true;
2362 break;
2363 }
2364 }
2365
2366 if (optind != argc - 1) {
2367 error_exit("Expecting one image file name");
2368 }
2369 filename = argv[optind++];
2370
2371 /* Open the image */
2372 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2373 if (!blk) {
2374 return 1;
2375 }
2376 bs = blk_bs(blk);
2377
2378 /* Perform the requested action */
2379 switch(action) {
2380 case SNAPSHOT_LIST:
2381 dump_snapshots(bs);
2382 break;
2383
2384 case SNAPSHOT_CREATE:
2385 memset(&sn, 0, sizeof(sn));
2386 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2387
2388 qemu_gettimeofday(&tv);
2389 sn.date_sec = tv.tv_sec;
2390 sn.date_nsec = tv.tv_usec * 1000;
2391
2392 ret = bdrv_snapshot_create(bs, &sn);
2393 if (ret) {
2394 error_report("Could not create snapshot '%s': %d (%s)",
2395 snapshot_name, ret, strerror(-ret));
2396 }
2397 break;
2398
2399 case SNAPSHOT_APPLY:
2400 ret = bdrv_snapshot_goto(bs, snapshot_name);
2401 if (ret) {
2402 error_report("Could not apply snapshot '%s': %d (%s)",
2403 snapshot_name, ret, strerror(-ret));
2404 }
2405 break;
2406
2407 case SNAPSHOT_DELETE:
2408 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
2409 if (err) {
2410 error_report("Could not delete snapshot '%s': (%s)",
2411 snapshot_name, error_get_pretty(err));
2412 error_free(err);
2413 ret = 1;
2414 }
2415 break;
2416 }
2417
2418 /* Cleanup */
2419 blk_unref(blk);
2420 if (ret) {
2421 return 1;
2422 }
2423 return 0;
2424 }
2425
2426 static int img_rebase(int argc, char **argv)
2427 {
2428 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
2429 BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL;
2430 BlockDriver *old_backing_drv, *new_backing_drv;
2431 char *filename;
2432 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2433 int c, flags, src_flags, ret;
2434 int unsafe = 0;
2435 int progress = 0;
2436 bool quiet = false;
2437 Error *local_err = NULL;
2438
2439 /* Parse commandline parameters */
2440 fmt = NULL;
2441 cache = BDRV_DEFAULT_CACHE;
2442 src_cache = BDRV_DEFAULT_CACHE;
2443 out_baseimg = NULL;
2444 out_basefmt = NULL;
2445 for(;;) {
2446 c = getopt(argc, argv, "hf:F:b:upt:T:q");
2447 if (c == -1) {
2448 break;
2449 }
2450 switch(c) {
2451 case '?':
2452 case 'h':
2453 help();
2454 return 0;
2455 case 'f':
2456 fmt = optarg;
2457 break;
2458 case 'F':
2459 out_basefmt = optarg;
2460 break;
2461 case 'b':
2462 out_baseimg = optarg;
2463 break;
2464 case 'u':
2465 unsafe = 1;
2466 break;
2467 case 'p':
2468 progress = 1;
2469 break;
2470 case 't':
2471 cache = optarg;
2472 break;
2473 case 'T':
2474 src_cache = optarg;
2475 break;
2476 case 'q':
2477 quiet = true;
2478 break;
2479 }
2480 }
2481
2482 if (quiet) {
2483 progress = 0;
2484 }
2485
2486 if (optind != argc - 1) {
2487 error_exit("Expecting one image file name");
2488 }
2489 if (!unsafe && !out_baseimg) {
2490 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2491 }
2492 filename = argv[optind++];
2493
2494 qemu_progress_init(progress, 2.0);
2495 qemu_progress_print(0, 100);
2496
2497 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
2498 ret = bdrv_parse_cache_flags(cache, &flags);
2499 if (ret < 0) {
2500 error_report("Invalid cache option: %s", cache);
2501 goto out;
2502 }
2503
2504 src_flags = BDRV_O_FLAGS;
2505 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2506 if (ret < 0) {
2507 error_report("Invalid source cache option: %s", src_cache);
2508 goto out;
2509 }
2510
2511 /*
2512 * Open the images.
2513 *
2514 * Ignore the old backing file for unsafe rebase in case we want to correct
2515 * the reference to a renamed or moved backing file.
2516 */
2517 blk = img_open("image", filename, fmt, flags, true, quiet);
2518 if (!blk) {
2519 ret = -1;
2520 goto out;
2521 }
2522 bs = blk_bs(blk);
2523
2524 /* Find the right drivers for the backing files */
2525 old_backing_drv = NULL;
2526 new_backing_drv = NULL;
2527
2528 if (!unsafe && bs->backing_format[0] != '\0') {
2529 old_backing_drv = bdrv_find_format(bs->backing_format);
2530 if (old_backing_drv == NULL) {
2531 error_report("Invalid format name: '%s'", bs->backing_format);
2532 ret = -1;
2533 goto out;
2534 }
2535 }
2536
2537 if (out_basefmt != NULL) {
2538 new_backing_drv = bdrv_find_format(out_basefmt);
2539 if (new_backing_drv == 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[1024];
2549
2550 blk_old_backing = blk_new_with_bs("old_backing", &error_abort);
2551 bs_old_backing = blk_bs(blk_old_backing);
2552 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2553 ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags,
2554 old_backing_drv, &local_err);
2555 if (ret) {
2556 error_report("Could not open old backing file '%s': %s",
2557 backing_name, error_get_pretty(local_err));
2558 error_free(local_err);
2559 goto out;
2560 }
2561 if (out_baseimg[0]) {
2562 blk_new_backing = blk_new_with_bs("new_backing", &error_abort);
2563 bs_new_backing = blk_bs(blk_new_backing);
2564 ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags,
2565 new_backing_drv, &local_err);
2566 if (ret) {
2567 error_report("Could not open new backing file '%s': %s",
2568 out_baseimg, error_get_pretty(local_err));
2569 error_free(local_err);
2570 goto out;
2571 }
2572 }
2573 }
2574
2575 /*
2576 * Check each unallocated cluster in the COW file. If it is unallocated,
2577 * accesses go to the backing file. We must therefore compare this cluster
2578 * in the old and new backing file, and if they differ we need to copy it
2579 * from the old backing file into the COW file.
2580 *
2581 * If qemu-img crashes during this step, no harm is done. The content of
2582 * the image is the same as the original one at any time.
2583 */
2584 if (!unsafe) {
2585 int64_t num_sectors;
2586 int64_t old_backing_num_sectors;
2587 int64_t new_backing_num_sectors = 0;
2588 uint64_t sector;
2589 int n;
2590 uint8_t * buf_old;
2591 uint8_t * buf_new;
2592 float local_progress = 0;
2593
2594 buf_old = qemu_blockalign(bs, IO_BUF_SIZE);
2595 buf_new = qemu_blockalign(bs, IO_BUF_SIZE);
2596
2597 num_sectors = bdrv_nb_sectors(bs);
2598 if (num_sectors < 0) {
2599 error_report("Could not get size of '%s': %s",
2600 filename, strerror(-num_sectors));
2601 ret = -1;
2602 goto out;
2603 }
2604 old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing);
2605 if (old_backing_num_sectors < 0) {
2606 char backing_name[1024];
2607
2608 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2609 error_report("Could not get size of '%s': %s",
2610 backing_name, strerror(-old_backing_num_sectors));
2611 ret = -1;
2612 goto out;
2613 }
2614 if (bs_new_backing) {
2615 new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing);
2616 if (new_backing_num_sectors < 0) {
2617 error_report("Could not get size of '%s': %s",
2618 out_baseimg, strerror(-new_backing_num_sectors));
2619 ret = -1;
2620 goto out;
2621 }
2622 }
2623
2624 if (num_sectors != 0) {
2625 local_progress = (float)100 /
2626 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2627 }
2628
2629 for (sector = 0; sector < num_sectors; sector += n) {
2630
2631 /* How many sectors can we handle with the next read? */
2632 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2633 n = (IO_BUF_SIZE / 512);
2634 } else {
2635 n = num_sectors - sector;
2636 }
2637
2638 /* If the cluster is allocated, we don't need to take action */
2639 ret = bdrv_is_allocated(bs, sector, n, &n);
2640 if (ret < 0) {
2641 error_report("error while reading image metadata: %s",
2642 strerror(-ret));
2643 goto out;
2644 }
2645 if (ret) {
2646 continue;
2647 }
2648
2649 /*
2650 * Read old and new backing file and take into consideration that
2651 * backing files may be smaller than the COW image.
2652 */
2653 if (sector >= old_backing_num_sectors) {
2654 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2655 } else {
2656 if (sector + n > old_backing_num_sectors) {
2657 n = old_backing_num_sectors - sector;
2658 }
2659
2660 ret = bdrv_read(bs_old_backing, sector, buf_old, n);
2661 if (ret < 0) {
2662 error_report("error while reading from old backing file");
2663 goto out;
2664 }
2665 }
2666
2667 if (sector >= new_backing_num_sectors || !bs_new_backing) {
2668 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2669 } else {
2670 if (sector + n > new_backing_num_sectors) {
2671 n = new_backing_num_sectors - sector;
2672 }
2673
2674 ret = bdrv_read(bs_new_backing, sector, buf_new, n);
2675 if (ret < 0) {
2676 error_report("error while reading from new backing file");
2677 goto out;
2678 }
2679 }
2680
2681 /* If they differ, we need to write to the COW file */
2682 uint64_t written = 0;
2683
2684 while (written < n) {
2685 int pnum;
2686
2687 if (compare_sectors(buf_old + written * 512,
2688 buf_new + written * 512, n - written, &pnum))
2689 {
2690 ret = bdrv_write(bs, sector + written,
2691 buf_old + written * 512, pnum);
2692 if (ret < 0) {
2693 error_report("Error while writing to COW image: %s",
2694 strerror(-ret));
2695 goto out;
2696 }
2697 }
2698
2699 written += pnum;
2700 }
2701 qemu_progress_print(local_progress, 100);
2702 }
2703
2704 qemu_vfree(buf_old);
2705 qemu_vfree(buf_new);
2706 }
2707
2708 /*
2709 * Change the backing file. All clusters that are different from the old
2710 * backing file are overwritten in the COW file now, so the visible content
2711 * doesn't change when we switch the backing file.
2712 */
2713 if (out_baseimg && *out_baseimg) {
2714 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2715 } else {
2716 ret = bdrv_change_backing_file(bs, NULL, NULL);
2717 }
2718
2719 if (ret == -ENOSPC) {
2720 error_report("Could not change the backing file to '%s': No "
2721 "space left in the file header", out_baseimg);
2722 } else if (ret < 0) {
2723 error_report("Could not change the backing file to '%s': %s",
2724 out_baseimg, strerror(-ret));
2725 }
2726
2727 qemu_progress_print(100, 0);
2728 /*
2729 * TODO At this point it is possible to check if any clusters that are
2730 * allocated in the COW file are the same in the backing file. If so, they
2731 * could be dropped from the COW file. Don't do this before switching the
2732 * backing file, in case of a crash this would lead to corruption.
2733 */
2734 out:
2735 qemu_progress_end();
2736 /* Cleanup */
2737 if (!unsafe) {
2738 blk_unref(blk_old_backing);
2739 blk_unref(blk_new_backing);
2740 }
2741
2742 blk_unref(blk);
2743 if (ret) {
2744 return 1;
2745 }
2746 return 0;
2747 }
2748
2749 static int img_resize(int argc, char **argv)
2750 {
2751 int c, ret, relative;
2752 const char *filename, *fmt, *size;
2753 int64_t n, total_size;
2754 bool quiet = false;
2755 BlockBackend *blk = NULL;
2756 BlockDriverState *bs = NULL;
2757 QemuOpts *param;
2758 static QemuOptsList resize_options = {
2759 .name = "resize_options",
2760 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2761 .desc = {
2762 {
2763 .name = BLOCK_OPT_SIZE,
2764 .type = QEMU_OPT_SIZE,
2765 .help = "Virtual disk size"
2766 }, {
2767 /* end of list */
2768 }
2769 },
2770 };
2771
2772 /* Remove size from argv manually so that negative numbers are not treated
2773 * as options by getopt. */
2774 if (argc < 3) {
2775 error_exit("Not enough arguments");
2776 return 1;
2777 }
2778
2779 size = argv[--argc];
2780
2781 /* Parse getopt arguments */
2782 fmt = NULL;
2783 for(;;) {
2784 c = getopt(argc, argv, "f:hq");
2785 if (c == -1) {
2786 break;
2787 }
2788 switch(c) {
2789 case '?':
2790 case 'h':
2791 help();
2792 break;
2793 case 'f':
2794 fmt = optarg;
2795 break;
2796 case 'q':
2797 quiet = true;
2798 break;
2799 }
2800 }
2801 if (optind != argc - 1) {
2802 error_exit("Expecting one image file name");
2803 }
2804 filename = argv[optind++];
2805
2806 /* Choose grow, shrink, or absolute resize mode */
2807 switch (size[0]) {
2808 case '+':
2809 relative = 1;
2810 size++;
2811 break;
2812 case '-':
2813 relative = -1;
2814 size++;
2815 break;
2816 default:
2817 relative = 0;
2818 break;
2819 }
2820
2821 /* Parse size */
2822 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
2823 if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
2824 /* Error message already printed when size parsing fails */
2825 ret = -1;
2826 qemu_opts_del(param);
2827 goto out;
2828 }
2829 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2830 qemu_opts_del(param);
2831
2832 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2833 true, quiet);
2834 if (!blk) {
2835 ret = -1;
2836 goto out;
2837 }
2838 bs = blk_bs(blk);
2839
2840 if (relative) {
2841 total_size = bdrv_getlength(bs) + n * relative;
2842 } else {
2843 total_size = n;
2844 }
2845 if (total_size <= 0) {
2846 error_report("New image size must be positive");
2847 ret = -1;
2848 goto out;
2849 }
2850
2851 ret = bdrv_truncate(bs, total_size);
2852 switch (ret) {
2853 case 0:
2854 qprintf(quiet, "Image resized.\n");
2855 break;
2856 case -ENOTSUP:
2857 error_report("This image does not support resize");
2858 break;
2859 case -EACCES:
2860 error_report("Image is read-only");
2861 break;
2862 default:
2863 error_report("Error resizing image (%d)", -ret);
2864 break;
2865 }
2866 out:
2867 blk_unref(blk);
2868 if (ret) {
2869 return 1;
2870 }
2871 return 0;
2872 }
2873
2874 static void amend_status_cb(BlockDriverState *bs,
2875 int64_t offset, int64_t total_work_size)
2876 {
2877 qemu_progress_print(100.f * offset / total_work_size, 0);
2878 }
2879
2880 static int img_amend(int argc, char **argv)
2881 {
2882 int c, ret = 0;
2883 char *options = NULL;
2884 QemuOptsList *create_opts = NULL;
2885 QemuOpts *opts = NULL;
2886 const char *fmt = NULL, *filename, *cache;
2887 int flags;
2888 bool quiet = false, progress = false;
2889 BlockBackend *blk = NULL;
2890 BlockDriverState *bs = NULL;
2891
2892 cache = BDRV_DEFAULT_CACHE;
2893 for (;;) {
2894 c = getopt(argc, argv, "ho:f:t:pq");
2895 if (c == -1) {
2896 break;
2897 }
2898
2899 switch (c) {
2900 case 'h':
2901 case '?':
2902 help();
2903 break;
2904 case 'o':
2905 if (!is_valid_option_list(optarg)) {
2906 error_report("Invalid option list: %s", optarg);
2907 ret = -1;
2908 goto out;
2909 }
2910 if (!options) {
2911 options = g_strdup(optarg);
2912 } else {
2913 char *old_options = options;
2914 options = g_strdup_printf("%s,%s", options, optarg);
2915 g_free(old_options);
2916 }
2917 break;
2918 case 'f':
2919 fmt = optarg;
2920 break;
2921 case 't':
2922 cache = optarg;
2923 break;
2924 case 'p':
2925 progress = true;
2926 break;
2927 case 'q':
2928 quiet = true;
2929 break;
2930 }
2931 }
2932
2933 if (!options) {
2934 error_exit("Must specify options (-o)");
2935 }
2936
2937 if (quiet) {
2938 progress = false;
2939 }
2940 qemu_progress_init(progress, 1.0);
2941
2942 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2943 if (fmt && has_help_option(options)) {
2944 /* If a format is explicitly specified (and possibly no filename is
2945 * given), print option help here */
2946 ret = print_block_option_help(filename, fmt);
2947 goto out;
2948 }
2949
2950 if (optind != argc - 1) {
2951 error_report("Expecting one image file name");
2952 ret = -1;
2953 goto out;
2954 }
2955
2956 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2957 ret = bdrv_parse_cache_flags(cache, &flags);
2958 if (ret < 0) {
2959 error_report("Invalid cache option: %s", cache);
2960 goto out;
2961 }
2962
2963 blk = img_open("image", filename, fmt, flags, true, quiet);
2964 if (!blk) {
2965 error_report("Could not open image '%s'", filename);
2966 ret = -1;
2967 goto out;
2968 }
2969 bs = blk_bs(blk);
2970
2971 fmt = bs->drv->format_name;
2972
2973 if (has_help_option(options)) {
2974 /* If the format was auto-detected, print option help here */
2975 ret = print_block_option_help(filename, fmt);
2976 goto out;
2977 }
2978
2979 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
2980 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
2981 if (options && qemu_opts_do_parse(opts, options, NULL)) {
2982 error_report("Invalid options for file format '%s'", fmt);
2983 ret = -1;
2984 goto out;
2985 }
2986
2987 /* In case the driver does not call amend_status_cb() */
2988 qemu_progress_print(0.f, 0);
2989 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
2990 qemu_progress_print(100.f, 0);
2991 if (ret < 0) {
2992 error_report("Error while amending options: %s", strerror(-ret));
2993 goto out;
2994 }
2995
2996 out:
2997 qemu_progress_end();
2998
2999 blk_unref(blk);
3000 qemu_opts_del(opts);
3001 qemu_opts_free(create_opts);
3002 g_free(options);
3003
3004 if (ret) {
3005 return 1;
3006 }
3007 return 0;
3008 }
3009
3010 static const img_cmd_t img_cmds[] = {
3011 #define DEF(option, callback, arg_string) \
3012 { option, callback },
3013 #include "qemu-img-cmds.h"
3014 #undef DEF
3015 #undef GEN_DOCS
3016 { NULL, NULL, },
3017 };
3018
3019 int main(int argc, char **argv)
3020 {
3021 const img_cmd_t *cmd;
3022 const char *cmdname;
3023 Error *local_error = NULL;
3024 int c;
3025 static const struct option long_options[] = {
3026 {"help", no_argument, 0, 'h'},
3027 {"version", no_argument, 0, 'v'},
3028 {0, 0, 0, 0}
3029 };
3030
3031 #ifdef CONFIG_POSIX
3032 signal(SIGPIPE, SIG_IGN);
3033 #endif
3034
3035 error_set_progname(argv[0]);
3036 qemu_init_exec_dir(argv[0]);
3037
3038 if (qemu_init_main_loop(&local_error)) {
3039 error_report("%s", error_get_pretty(local_error));
3040 error_free(local_error);
3041 exit(EXIT_FAILURE);
3042 }
3043
3044 bdrv_init();
3045 if (argc < 2) {
3046 error_exit("Not enough arguments");
3047 }
3048 cmdname = argv[1];
3049
3050 /* find the command */
3051 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
3052 if (!strcmp(cmdname, cmd->name)) {
3053 return cmd->handler(argc - 1, argv + 1);
3054 }
3055 }
3056
3057 c = getopt_long(argc, argv, "h", long_options, NULL);
3058
3059 if (c == 'h') {
3060 help();
3061 }
3062 if (c == 'v') {
3063 printf(QEMU_IMG_VERSION);
3064 return 0;
3065 }
3066
3067 /* not found */
3068 error_exit("Command not found: %s", cmdname);
3069 }