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memsave: Improve and disambiguate error message
[qemu/cris-port.git] / qemu-img.c
blob7ac7f56c5d5f8eac590e16b48933535841fdc048
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 qerror_report_err(local_err);
278 error_free(local_err);
279 qemu_opts_free(create_opts);
280 return 1;
281 }
282 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
283 }
284
285 qemu_opts_print_help(create_opts);
286 qemu_opts_free(create_opts);
287 return 0;
288 }
289
290 static BlockBackend *img_open(const char *id, const char *filename,
291 const char *fmt, int flags,
292 bool require_io, bool quiet)
293 {
294 BlockBackend *blk;
295 BlockDriverState *bs;
296 char password[256];
297 Error *local_err = NULL;
298 QDict *options = NULL;
299
300 if (fmt) {
301 options = qdict_new();
302 qdict_put(options, "driver", qstring_from_str(fmt));
303 }
304
305 blk = blk_new_open(id, filename, NULL, options, flags, &local_err);
306 if (!blk) {
307 error_report("Could not open '%s': %s", filename,
308 error_get_pretty(local_err));
309 error_free(local_err);
310 goto fail;
311 }
312
313 bs = blk_bs(blk);
314 if (bdrv_is_encrypted(bs) && require_io) {
315 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
316 if (read_password(password, sizeof(password)) < 0) {
317 error_report("No password given");
318 goto fail;
319 }
320 if (bdrv_set_key(bs, password) < 0) {
321 error_report("invalid password");
322 goto fail;
323 }
324 }
325 return blk;
326 fail:
327 blk_unref(blk);
328 return NULL;
329 }
330
331 static int add_old_style_options(const char *fmt, QemuOpts *opts,
332 const char *base_filename,
333 const char *base_fmt)
334 {
335 Error *err = NULL;
336
337 if (base_filename) {
338 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err);
339 if (err) {
340 error_report("Backing file not supported for file format '%s'",
341 fmt);
342 error_free(err);
343 return -1;
344 }
345 }
346 if (base_fmt) {
347 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err);
348 if (err) {
349 error_report("Backing file format not supported for file "
350 "format '%s'", fmt);
351 error_free(err);
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 error_report_err(local_err);
893 return 1;
894 }
895
896 qprintf(quiet, "Image committed.\n");
897 return 0;
898 }
899
900 /*
901 * Returns true iff the first sector pointed to by 'buf' contains at least
902 * a non-NUL byte.
903 *
904 * 'pnum' is set to the number of sectors (including and immediately following
905 * the first one) that are known to be in the same allocated/unallocated state.
906 */
907 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
908 {
909 bool is_zero;
910 int i;
911
912 if (n <= 0) {
913 *pnum = 0;
914 return 0;
915 }
916 is_zero = buffer_is_zero(buf, 512);
917 for(i = 1; i < n; i++) {
918 buf += 512;
919 if (is_zero != buffer_is_zero(buf, 512)) {
920 break;
921 }
922 }
923 *pnum = i;
924 return !is_zero;
925 }
926
927 /*
928 * Like is_allocated_sectors, but if the buffer starts with a used sector,
929 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
930 * breaking up write requests for only small sparse areas.
931 */
932 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
933 int min)
934 {
935 int ret;
936 int num_checked, num_used;
937
938 if (n < min) {
939 min = n;
940 }
941
942 ret = is_allocated_sectors(buf, n, pnum);
943 if (!ret) {
944 return ret;
945 }
946
947 num_used = *pnum;
948 buf += BDRV_SECTOR_SIZE * *pnum;
949 n -= *pnum;
950 num_checked = num_used;
951
952 while (n > 0) {
953 ret = is_allocated_sectors(buf, n, pnum);
954
955 buf += BDRV_SECTOR_SIZE * *pnum;
956 n -= *pnum;
957 num_checked += *pnum;
958 if (ret) {
959 num_used = num_checked;
960 } else if (*pnum >= min) {
961 break;
962 }
963 }
964
965 *pnum = num_used;
966 return 1;
967 }
968
969 /*
970 * Compares two buffers sector by sector. Returns 0 if the first sector of both
971 * buffers matches, non-zero otherwise.
972 *
973 * pnum is set to the number of sectors (including and immediately following
974 * the first one) that are known to have the same comparison result
975 */
976 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
977 int *pnum)
978 {
979 int res, 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 qerror_report_err(local_err);
1529 error_free(local_err);
1530 ret = -1;
1531 goto out;
1532 }
1533
1534 if (!skip_create) {
1535 if (!drv->create_opts) {
1536 error_report("Format driver '%s' does not support image creation",
1537 drv->format_name);
1538 ret = -1;
1539 goto out;
1540 }
1541
1542 if (!proto_drv->create_opts) {
1543 error_report("Protocol driver '%s' does not support image creation",
1544 proto_drv->format_name);
1545 ret = -1;
1546 goto out;
1547 }
1548
1549 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1550 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
1551
1552 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1553 if (options) {
1554 qemu_opts_do_parse(opts, options, NULL, &local_err);
1555 if (local_err) {
1556 error_report("Invalid options for file format '%s'", out_fmt);
1557 error_free(local_err);
1558 ret = -1;
1559 goto out;
1560 }
1561 }
1562
1563 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512,
1564 &error_abort);
1565 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
1566 if (ret < 0) {
1567 goto out;
1568 }
1569 }
1570
1571 /* Get backing file name if -o backing_file was used */
1572 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
1573 if (out_baseimg_param) {
1574 out_baseimg = out_baseimg_param;
1575 }
1576
1577 /* Check if compression is supported */
1578 if (compress) {
1579 bool encryption =
1580 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1581 const char *preallocation =
1582 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
1583
1584 if (!drv->bdrv_write_compressed) {
1585 error_report("Compression not supported for this file format");
1586 ret = -1;
1587 goto out;
1588 }
1589
1590 if (encryption) {
1591 error_report("Compression and encryption not supported at "
1592 "the same time");
1593 ret = -1;
1594 goto out;
1595 }
1596
1597 if (preallocation
1598 && strcmp(preallocation, "off"))
1599 {
1600 error_report("Compression and preallocation not supported at "
1601 "the same time");
1602 ret = -1;
1603 goto out;
1604 }
1605 }
1606
1607 if (!skip_create) {
1608 /* Create the new image */
1609 ret = bdrv_create(drv, out_filename, opts, &local_err);
1610 if (ret < 0) {
1611 error_report("%s: error while converting %s: %s",
1612 out_filename, out_fmt, error_get_pretty(local_err));
1613 error_free(local_err);
1614 goto out;
1615 }
1616 }
1617
1618 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
1619 ret = bdrv_parse_cache_flags(cache, &flags);
1620 if (ret < 0) {
1621 error_report("Invalid cache option: %s", cache);
1622 goto out;
1623 }
1624
1625 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1626 if (!out_blk) {
1627 ret = -1;
1628 goto out;
1629 }
1630 out_bs = blk_bs(out_blk);
1631
1632 bs_i = 0;
1633 bs_offset = 0;
1634
1635 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1636 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1637 * as maximum. */
1638 bufsectors = MIN(32768,
1639 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1640 out_bs->bl.discard_alignment))
1641 );
1642
1643 buf = blk_blockalign(out_blk, bufsectors * BDRV_SECTOR_SIZE);
1644
1645 if (skip_create) {
1646 int64_t output_sectors = blk_nb_sectors(out_blk);
1647 if (output_sectors < 0) {
1648 error_report("unable to get output image length: %s\n",
1649 strerror(-output_sectors));
1650 ret = -1;
1651 goto out;
1652 } else if (output_sectors < total_sectors) {
1653 error_report("output file is smaller than input file");
1654 ret = -1;
1655 goto out;
1656 }
1657 }
1658
1659 cluster_sectors = 0;
1660 ret = bdrv_get_info(out_bs, &bdi);
1661 if (ret < 0) {
1662 if (compress) {
1663 error_report("could not get block driver info");
1664 goto out;
1665 }
1666 } else {
1667 compress = compress || bdi.needs_compressed_writes;
1668 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1669 }
1670
1671 if (compress) {
1672 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
1673 error_report("invalid cluster size");
1674 ret = -1;
1675 goto out;
1676 }
1677 sector_num = 0;
1678
1679 nb_sectors = total_sectors;
1680
1681 for(;;) {
1682 int64_t bs_num;
1683 int remainder;
1684 uint8_t *buf2;
1685
1686 nb_sectors = total_sectors - sector_num;
1687 if (nb_sectors <= 0)
1688 break;
1689 if (nb_sectors >= cluster_sectors)
1690 n = cluster_sectors;
1691 else
1692 n = nb_sectors;
1693
1694 bs_num = sector_num - bs_offset;
1695 assert (bs_num >= 0);
1696 remainder = n;
1697 buf2 = buf;
1698 while (remainder > 0) {
1699 int nlow;
1700 while (bs_num == bs_sectors[bs_i]) {
1701 bs_offset += bs_sectors[bs_i];
1702 bs_i++;
1703 assert (bs_i < bs_n);
1704 bs_num = 0;
1705 /* printf("changing part: sector_num=%" PRId64 ", "
1706 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
1707 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1708 }
1709 assert (bs_num < bs_sectors[bs_i]);
1710
1711 nlow = remainder > bs_sectors[bs_i] - bs_num
1712 ? bs_sectors[bs_i] - bs_num : remainder;
1713
1714 ret = blk_read(blk[bs_i], bs_num, buf2, nlow);
1715 if (ret < 0) {
1716 error_report("error while reading sector %" PRId64 ": %s",
1717 bs_num, strerror(-ret));
1718 goto out;
1719 }
1720
1721 buf2 += nlow * 512;
1722 bs_num += nlow;
1723
1724 remainder -= nlow;
1725 }
1726 assert (remainder == 0);
1727
1728 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1729 ret = blk_write_compressed(out_blk, sector_num, buf, n);
1730 if (ret != 0) {
1731 error_report("error while compressing sector %" PRId64
1732 ": %s", sector_num, strerror(-ret));
1733 goto out;
1734 }
1735 }
1736 sector_num += n;
1737 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
1738 }
1739 /* signal EOF to align */
1740 blk_write_compressed(out_blk, 0, NULL, 0);
1741 } else {
1742 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1743 bool count_allocated_sectors;
1744 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
1745
1746 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1747 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1748 if (ret < 0) {
1749 goto out;
1750 }
1751 has_zero_init = 1;
1752 }
1753
1754 sectors_to_read = total_sectors;
1755 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1756 restart:
1757 sector_num = 0; // total number of sectors converted so far
1758 sectors_read = 0;
1759 sector_num_next_status = 0;
1760
1761 for(;;) {
1762 nb_sectors = total_sectors - sector_num;
1763 if (nb_sectors <= 0) {
1764 if (count_allocated_sectors) {
1765 sectors_to_read = sectors_read;
1766 count_allocated_sectors = false;
1767 goto restart;
1768 }
1769 ret = 0;
1770 break;
1771 }
1772
1773 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1774 bs_offset += bs_sectors[bs_i];
1775 bs_i ++;
1776 assert (bs_i < bs_n);
1777 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1778 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
1779 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1780 }
1781
1782 if ((out_baseimg || has_zero_init) &&
1783 sector_num >= sector_num_next_status) {
1784 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1785 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1786 n, &n1);
1787 if (ret < 0) {
1788 error_report("error while reading block status of sector %"
1789 PRId64 ": %s", sector_num - bs_offset,
1790 strerror(-ret));
1791 goto out;
1792 }
1793 /* If the output image is zero initialized, we are not working
1794 * on a shared base and the input is zero we can skip the next
1795 * n1 sectors */
1796 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
1797 sector_num += n1;
1798 continue;
1799 }
1800 /* If the output image is being created as a copy on write
1801 * image, assume that sectors which are unallocated in the
1802 * input image are present in both the output's and input's
1803 * base images (no need to copy them). */
1804 if (out_baseimg) {
1805 if (!(ret & BDRV_BLOCK_DATA)) {
1806 sector_num += n1;
1807 continue;
1808 }
1809 /* The next 'n1' sectors are allocated in the input image.
1810 * Copy only those as they may be followed by unallocated
1811 * sectors. */
1812 nb_sectors = n1;
1813 }
1814 /* avoid redundant callouts to get_block_status */
1815 sector_num_next_status = sector_num + n1;
1816 }
1817
1818 n = MIN(nb_sectors, bufsectors);
1819
1820 /* round down request length to an aligned sector, but
1821 * do not bother doing this on short requests. They happen
1822 * when we found an all-zero area, and the next sector to
1823 * write will not be sector_num + n. */
1824 if (cluster_sectors > 0 && n >= cluster_sectors) {
1825 int64_t next_aligned_sector = (sector_num + n);
1826 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1827 if (sector_num + n > next_aligned_sector) {
1828 n = next_aligned_sector - sector_num;
1829 }
1830 }
1831
1832 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
1833
1834 sectors_read += n;
1835 if (count_allocated_sectors) {
1836 sector_num += n;
1837 continue;
1838 }
1839
1840 n1 = n;
1841 ret = blk_read(blk[bs_i], sector_num - bs_offset, buf, n);
1842 if (ret < 0) {
1843 error_report("error while reading sector %" PRId64 ": %s",
1844 sector_num - bs_offset, strerror(-ret));
1845 goto out;
1846 }
1847 /* NOTE: at the same time we convert, we do not write zero
1848 sectors to have a chance to compress the image. Ideally, we
1849 should add a specific call to have the info to go faster */
1850 buf1 = buf;
1851 while (n > 0) {
1852 if (!has_zero_init ||
1853 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
1854 ret = blk_write(out_blk, sector_num, buf1, n1);
1855 if (ret < 0) {
1856 error_report("error while writing sector %" PRId64
1857 ": %s", sector_num, strerror(-ret));
1858 goto out;
1859 }
1860 }
1861 sector_num += n1;
1862 n -= n1;
1863 buf1 += n1 * 512;
1864 }
1865 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
1866 }
1867 }
1868 out:
1869 if (!ret) {
1870 qemu_progress_print(100, 0);
1871 }
1872 qemu_progress_end();
1873 qemu_opts_del(opts);
1874 qemu_opts_free(create_opts);
1875 qemu_vfree(buf);
1876 qemu_opts_del(sn_opts);
1877 blk_unref(out_blk);
1878 g_free(bs);
1879 if (blk) {
1880 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1881 blk_unref(blk[bs_i]);
1882 }
1883 g_free(blk);
1884 }
1885 g_free(bs_sectors);
1886 fail_getopt:
1887 g_free(options);
1888
1889 if (ret) {
1890 return 1;
1891 }
1892 return 0;
1893 }
1894
1895
1896 static void dump_snapshots(BlockDriverState *bs)
1897 {
1898 QEMUSnapshotInfo *sn_tab, *sn;
1899 int nb_sns, i;
1900
1901 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1902 if (nb_sns <= 0)
1903 return;
1904 printf("Snapshot list:\n");
1905 bdrv_snapshot_dump(fprintf, stdout, NULL);
1906 printf("\n");
1907 for(i = 0; i < nb_sns; i++) {
1908 sn = &sn_tab[i];
1909 bdrv_snapshot_dump(fprintf, stdout, sn);
1910 printf("\n");
1911 }
1912 g_free(sn_tab);
1913 }
1914
1915 static void dump_json_image_info_list(ImageInfoList *list)
1916 {
1917 Error *local_err = NULL;
1918 QString *str;
1919 QmpOutputVisitor *ov = qmp_output_visitor_new();
1920 QObject *obj;
1921 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
1922 &list, NULL, &local_err);
1923 obj = qmp_output_get_qobject(ov);
1924 str = qobject_to_json_pretty(obj);
1925 assert(str != NULL);
1926 printf("%s\n", qstring_get_str(str));
1927 qobject_decref(obj);
1928 qmp_output_visitor_cleanup(ov);
1929 QDECREF(str);
1930 }
1931
1932 static void dump_json_image_info(ImageInfo *info)
1933 {
1934 Error *local_err = NULL;
1935 QString *str;
1936 QmpOutputVisitor *ov = qmp_output_visitor_new();
1937 QObject *obj;
1938 visit_type_ImageInfo(qmp_output_get_visitor(ov),
1939 &info, NULL, &local_err);
1940 obj = qmp_output_get_qobject(ov);
1941 str = qobject_to_json_pretty(obj);
1942 assert(str != NULL);
1943 printf("%s\n", qstring_get_str(str));
1944 qobject_decref(obj);
1945 qmp_output_visitor_cleanup(ov);
1946 QDECREF(str);
1947 }
1948
1949 static void dump_human_image_info_list(ImageInfoList *list)
1950 {
1951 ImageInfoList *elem;
1952 bool delim = false;
1953
1954 for (elem = list; elem; elem = elem->next) {
1955 if (delim) {
1956 printf("\n");
1957 }
1958 delim = true;
1959
1960 bdrv_image_info_dump(fprintf, stdout, elem->value);
1961 }
1962 }
1963
1964 static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1965 {
1966 return strcmp(a, b) == 0;
1967 }
1968
1969 /**
1970 * Open an image file chain and return an ImageInfoList
1971 *
1972 * @filename: topmost image filename
1973 * @fmt: topmost image format (may be NULL to autodetect)
1974 * @chain: true - enumerate entire backing file chain
1975 * false - only topmost image file
1976 *
1977 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1978 * image file. If there was an error a message will have been printed to
1979 * stderr.
1980 */
1981 static ImageInfoList *collect_image_info_list(const char *filename,
1982 const char *fmt,
1983 bool chain)
1984 {
1985 ImageInfoList *head = NULL;
1986 ImageInfoList **last = &head;
1987 GHashTable *filenames;
1988 Error *err = NULL;
1989
1990 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1991
1992 while (filename) {
1993 BlockBackend *blk;
1994 BlockDriverState *bs;
1995 ImageInfo *info;
1996 ImageInfoList *elem;
1997
1998 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
1999 error_report("Backing file '%s' creates an infinite loop.",
2000 filename);
2001 goto err;
2002 }
2003 g_hash_table_insert(filenames, (gpointer)filename, NULL);
2004
2005 blk = img_open("image", filename, fmt,
2006 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
2007 if (!blk) {
2008 goto err;
2009 }
2010 bs = blk_bs(blk);
2011
2012 bdrv_query_image_info(bs, &info, &err);
2013 if (err) {
2014 error_report_err(err);
2015 blk_unref(blk);
2016 goto err;
2017 }
2018
2019 elem = g_new0(ImageInfoList, 1);
2020 elem->value = info;
2021 *last = elem;
2022 last = &elem->next;
2023
2024 blk_unref(blk);
2025
2026 filename = fmt = NULL;
2027 if (chain) {
2028 if (info->has_full_backing_filename) {
2029 filename = info->full_backing_filename;
2030 } else if (info->has_backing_filename) {
2031 filename = info->backing_filename;
2032 }
2033 if (info->has_backing_filename_format) {
2034 fmt = info->backing_filename_format;
2035 }
2036 }
2037 }
2038 g_hash_table_destroy(filenames);
2039 return head;
2040
2041 err:
2042 qapi_free_ImageInfoList(head);
2043 g_hash_table_destroy(filenames);
2044 return NULL;
2045 }
2046
2047 static int img_info(int argc, char **argv)
2048 {
2049 int c;
2050 OutputFormat output_format = OFORMAT_HUMAN;
2051 bool chain = false;
2052 const char *filename, *fmt, *output;
2053 ImageInfoList *list;
2054
2055 fmt = NULL;
2056 output = NULL;
2057 for(;;) {
2058 int option_index = 0;
2059 static const struct option long_options[] = {
2060 {"help", no_argument, 0, 'h'},
2061 {"format", required_argument, 0, 'f'},
2062 {"output", required_argument, 0, OPTION_OUTPUT},
2063 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
2064 {0, 0, 0, 0}
2065 };
2066 c = getopt_long(argc, argv, "f:h",
2067 long_options, &option_index);
2068 if (c == -1) {
2069 break;
2070 }
2071 switch(c) {
2072 case '?':
2073 case 'h':
2074 help();
2075 break;
2076 case 'f':
2077 fmt = optarg;
2078 break;
2079 case OPTION_OUTPUT:
2080 output = optarg;
2081 break;
2082 case OPTION_BACKING_CHAIN:
2083 chain = true;
2084 break;
2085 }
2086 }
2087 if (optind != argc - 1) {
2088 error_exit("Expecting one image file name");
2089 }
2090 filename = argv[optind++];
2091
2092 if (output && !strcmp(output, "json")) {
2093 output_format = OFORMAT_JSON;
2094 } else if (output && !strcmp(output, "human")) {
2095 output_format = OFORMAT_HUMAN;
2096 } else if (output) {
2097 error_report("--output must be used with human or json as argument.");
2098 return 1;
2099 }
2100
2101 list = collect_image_info_list(filename, fmt, chain);
2102 if (!list) {
2103 return 1;
2104 }
2105
2106 switch (output_format) {
2107 case OFORMAT_HUMAN:
2108 dump_human_image_info_list(list);
2109 break;
2110 case OFORMAT_JSON:
2111 if (chain) {
2112 dump_json_image_info_list(list);
2113 } else {
2114 dump_json_image_info(list->value);
2115 }
2116 break;
2117 }
2118
2119 qapi_free_ImageInfoList(list);
2120 return 0;
2121 }
2122
2123
2124 typedef struct MapEntry {
2125 int flags;
2126 int depth;
2127 int64_t start;
2128 int64_t length;
2129 int64_t offset;
2130 BlockDriverState *bs;
2131 } MapEntry;
2132
2133 static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2134 MapEntry *next)
2135 {
2136 switch (output_format) {
2137 case OFORMAT_HUMAN:
2138 if ((e->flags & BDRV_BLOCK_DATA) &&
2139 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2140 error_report("File contains external, encrypted or compressed clusters.");
2141 exit(1);
2142 }
2143 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2144 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2145 e->start, e->length, e->offset, e->bs->filename);
2146 }
2147 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2148 * Modify the flags here to allow more coalescing.
2149 */
2150 if (next &&
2151 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2152 next->flags &= ~BDRV_BLOCK_DATA;
2153 next->flags |= BDRV_BLOCK_ZERO;
2154 }
2155 break;
2156 case OFORMAT_JSON:
2157 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2158 " \"zero\": %s, \"data\": %s",
2159 (e->start == 0 ? "[" : ",\n"),
2160 e->start, e->length, e->depth,
2161 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2162 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2163 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
2164 printf(", \"offset\": %"PRId64"", e->offset);
2165 }
2166 putchar('}');
2167
2168 if (!next) {
2169 printf("]\n");
2170 }
2171 break;
2172 }
2173 }
2174
2175 static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2176 int nb_sectors, MapEntry *e)
2177 {
2178 int64_t ret;
2179 int depth;
2180
2181 /* As an optimization, we could cache the current range of unallocated
2182 * clusters in each file of the chain, and avoid querying the same
2183 * range repeatedly.
2184 */
2185
2186 depth = 0;
2187 for (;;) {
2188 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2189 if (ret < 0) {
2190 return ret;
2191 }
2192 assert(nb_sectors);
2193 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2194 break;
2195 }
2196 bs = bs->backing_hd;
2197 if (bs == NULL) {
2198 ret = 0;
2199 break;
2200 }
2201
2202 depth++;
2203 }
2204
2205 e->start = sector_num * BDRV_SECTOR_SIZE;
2206 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2207 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2208 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2209 e->depth = depth;
2210 e->bs = bs;
2211 return 0;
2212 }
2213
2214 static int img_map(int argc, char **argv)
2215 {
2216 int c;
2217 OutputFormat output_format = OFORMAT_HUMAN;
2218 BlockBackend *blk;
2219 BlockDriverState *bs;
2220 const char *filename, *fmt, *output;
2221 int64_t length;
2222 MapEntry curr = { .length = 0 }, next;
2223 int ret = 0;
2224
2225 fmt = NULL;
2226 output = NULL;
2227 for (;;) {
2228 int option_index = 0;
2229 static const struct option long_options[] = {
2230 {"help", no_argument, 0, 'h'},
2231 {"format", required_argument, 0, 'f'},
2232 {"output", required_argument, 0, OPTION_OUTPUT},
2233 {0, 0, 0, 0}
2234 };
2235 c = getopt_long(argc, argv, "f:h",
2236 long_options, &option_index);
2237 if (c == -1) {
2238 break;
2239 }
2240 switch (c) {
2241 case '?':
2242 case 'h':
2243 help();
2244 break;
2245 case 'f':
2246 fmt = optarg;
2247 break;
2248 case OPTION_OUTPUT:
2249 output = optarg;
2250 break;
2251 }
2252 }
2253 if (optind != argc - 1) {
2254 error_exit("Expecting one image file name");
2255 }
2256 filename = argv[optind];
2257
2258 if (output && !strcmp(output, "json")) {
2259 output_format = OFORMAT_JSON;
2260 } else if (output && !strcmp(output, "human")) {
2261 output_format = OFORMAT_HUMAN;
2262 } else if (output) {
2263 error_report("--output must be used with human or json as argument.");
2264 return 1;
2265 }
2266
2267 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2268 if (!blk) {
2269 return 1;
2270 }
2271 bs = blk_bs(blk);
2272
2273 if (output_format == OFORMAT_HUMAN) {
2274 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2275 }
2276
2277 length = blk_getlength(blk);
2278 while (curr.start + curr.length < length) {
2279 int64_t nsectors_left;
2280 int64_t sector_num;
2281 int n;
2282
2283 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2284
2285 /* Probe up to 1 GiB at a time. */
2286 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2287 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2288 ret = get_block_status(bs, sector_num, n, &next);
2289
2290 if (ret < 0) {
2291 error_report("Could not read file metadata: %s", strerror(-ret));
2292 goto out;
2293 }
2294
2295 if (curr.length != 0 && curr.flags == next.flags &&
2296 curr.depth == next.depth &&
2297 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2298 curr.offset + curr.length == next.offset)) {
2299 curr.length += next.length;
2300 continue;
2301 }
2302
2303 if (curr.length > 0) {
2304 dump_map_entry(output_format, &curr, &next);
2305 }
2306 curr = next;
2307 }
2308
2309 dump_map_entry(output_format, &curr, NULL);
2310
2311 out:
2312 blk_unref(blk);
2313 return ret < 0;
2314 }
2315
2316 #define SNAPSHOT_LIST 1
2317 #define SNAPSHOT_CREATE 2
2318 #define SNAPSHOT_APPLY 3
2319 #define SNAPSHOT_DELETE 4
2320
2321 static int img_snapshot(int argc, char **argv)
2322 {
2323 BlockBackend *blk;
2324 BlockDriverState *bs;
2325 QEMUSnapshotInfo sn;
2326 char *filename, *snapshot_name = NULL;
2327 int c, ret = 0, bdrv_oflags;
2328 int action = 0;
2329 qemu_timeval tv;
2330 bool quiet = false;
2331 Error *err = NULL;
2332
2333 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
2334 /* Parse commandline parameters */
2335 for(;;) {
2336 c = getopt(argc, argv, "la:c:d:hq");
2337 if (c == -1) {
2338 break;
2339 }
2340 switch(c) {
2341 case '?':
2342 case 'h':
2343 help();
2344 return 0;
2345 case 'l':
2346 if (action) {
2347 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2348 return 0;
2349 }
2350 action = SNAPSHOT_LIST;
2351 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
2352 break;
2353 case 'a':
2354 if (action) {
2355 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2356 return 0;
2357 }
2358 action = SNAPSHOT_APPLY;
2359 snapshot_name = optarg;
2360 break;
2361 case 'c':
2362 if (action) {
2363 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2364 return 0;
2365 }
2366 action = SNAPSHOT_CREATE;
2367 snapshot_name = optarg;
2368 break;
2369 case 'd':
2370 if (action) {
2371 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2372 return 0;
2373 }
2374 action = SNAPSHOT_DELETE;
2375 snapshot_name = optarg;
2376 break;
2377 case 'q':
2378 quiet = true;
2379 break;
2380 }
2381 }
2382
2383 if (optind != argc - 1) {
2384 error_exit("Expecting one image file name");
2385 }
2386 filename = argv[optind++];
2387
2388 /* Open the image */
2389 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2390 if (!blk) {
2391 return 1;
2392 }
2393 bs = blk_bs(blk);
2394
2395 /* Perform the requested action */
2396 switch(action) {
2397 case SNAPSHOT_LIST:
2398 dump_snapshots(bs);
2399 break;
2400
2401 case SNAPSHOT_CREATE:
2402 memset(&sn, 0, sizeof(sn));
2403 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2404
2405 qemu_gettimeofday(&tv);
2406 sn.date_sec = tv.tv_sec;
2407 sn.date_nsec = tv.tv_usec * 1000;
2408
2409 ret = bdrv_snapshot_create(bs, &sn);
2410 if (ret) {
2411 error_report("Could not create snapshot '%s': %d (%s)",
2412 snapshot_name, ret, strerror(-ret));
2413 }
2414 break;
2415
2416 case SNAPSHOT_APPLY:
2417 ret = bdrv_snapshot_goto(bs, snapshot_name);
2418 if (ret) {
2419 error_report("Could not apply snapshot '%s': %d (%s)",
2420 snapshot_name, ret, strerror(-ret));
2421 }
2422 break;
2423
2424 case SNAPSHOT_DELETE:
2425 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
2426 if (err) {
2427 error_report("Could not delete snapshot '%s': (%s)",
2428 snapshot_name, error_get_pretty(err));
2429 error_free(err);
2430 ret = 1;
2431 }
2432 break;
2433 }
2434
2435 /* Cleanup */
2436 blk_unref(blk);
2437 if (ret) {
2438 return 1;
2439 }
2440 return 0;
2441 }
2442
2443 static int img_rebase(int argc, char **argv)
2444 {
2445 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
2446 BlockDriverState *bs = NULL;
2447 char *filename;
2448 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2449 int c, flags, src_flags, ret;
2450 int unsafe = 0;
2451 int progress = 0;
2452 bool quiet = false;
2453 Error *local_err = NULL;
2454
2455 /* Parse commandline parameters */
2456 fmt = NULL;
2457 cache = BDRV_DEFAULT_CACHE;
2458 src_cache = BDRV_DEFAULT_CACHE;
2459 out_baseimg = NULL;
2460 out_basefmt = NULL;
2461 for(;;) {
2462 c = getopt(argc, argv, "hf:F:b:upt:T:q");
2463 if (c == -1) {
2464 break;
2465 }
2466 switch(c) {
2467 case '?':
2468 case 'h':
2469 help();
2470 return 0;
2471 case 'f':
2472 fmt = optarg;
2473 break;
2474 case 'F':
2475 out_basefmt = optarg;
2476 break;
2477 case 'b':
2478 out_baseimg = optarg;
2479 break;
2480 case 'u':
2481 unsafe = 1;
2482 break;
2483 case 'p':
2484 progress = 1;
2485 break;
2486 case 't':
2487 cache = optarg;
2488 break;
2489 case 'T':
2490 src_cache = optarg;
2491 break;
2492 case 'q':
2493 quiet = true;
2494 break;
2495 }
2496 }
2497
2498 if (quiet) {
2499 progress = 0;
2500 }
2501
2502 if (optind != argc - 1) {
2503 error_exit("Expecting one image file name");
2504 }
2505 if (!unsafe && !out_baseimg) {
2506 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2507 }
2508 filename = argv[optind++];
2509
2510 qemu_progress_init(progress, 2.0);
2511 qemu_progress_print(0, 100);
2512
2513 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
2514 ret = bdrv_parse_cache_flags(cache, &flags);
2515 if (ret < 0) {
2516 error_report("Invalid cache option: %s", cache);
2517 goto out;
2518 }
2519
2520 src_flags = BDRV_O_FLAGS;
2521 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2522 if (ret < 0) {
2523 error_report("Invalid source cache option: %s", src_cache);
2524 goto out;
2525 }
2526
2527 /*
2528 * Open the images.
2529 *
2530 * Ignore the old backing file for unsafe rebase in case we want to correct
2531 * the reference to a renamed or moved backing file.
2532 */
2533 blk = img_open("image", filename, fmt, flags, true, quiet);
2534 if (!blk) {
2535 ret = -1;
2536 goto out;
2537 }
2538 bs = blk_bs(blk);
2539
2540 if (out_basefmt != NULL) {
2541 if (bdrv_find_format(out_basefmt) == NULL) {
2542 error_report("Invalid format name: '%s'", out_basefmt);
2543 ret = -1;
2544 goto out;
2545 }
2546 }
2547
2548 /* For safe rebasing we need to compare old and new backing file */
2549 if (!unsafe) {
2550 char backing_name[PATH_MAX];
2551 QDict *options = NULL;
2552
2553 if (bs->backing_format[0] != '\0') {
2554 options = qdict_new();
2555 qdict_put(options, "driver", qstring_from_str(bs->backing_format));
2556 }
2557
2558 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2559 blk_old_backing = blk_new_open("old_backing", backing_name, NULL,
2560 options, src_flags, &local_err);
2561 if (!blk_old_backing) {
2562 error_report("Could not open old backing file '%s': %s",
2563 backing_name, error_get_pretty(local_err));
2564 error_free(local_err);
2565 goto out;
2566 }
2567
2568 if (out_baseimg[0]) {
2569 if (out_basefmt) {
2570 options = qdict_new();
2571 qdict_put(options, "driver", qstring_from_str(out_basefmt));
2572 } else {
2573 options = NULL;
2574 }
2575
2576 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL,
2577 options, src_flags, &local_err);
2578 if (!blk_new_backing) {
2579 error_report("Could not open new backing file '%s': %s",
2580 out_baseimg, error_get_pretty(local_err));
2581 error_free(local_err);
2582 goto out;
2583 }
2584 }
2585 }
2586
2587 /*
2588 * Check each unallocated cluster in the COW file. If it is unallocated,
2589 * accesses go to the backing file. We must therefore compare this cluster
2590 * in the old and new backing file, and if they differ we need to copy it
2591 * from the old backing file into the COW file.
2592 *
2593 * If qemu-img crashes during this step, no harm is done. The content of
2594 * the image is the same as the original one at any time.
2595 */
2596 if (!unsafe) {
2597 int64_t num_sectors;
2598 int64_t old_backing_num_sectors;
2599 int64_t new_backing_num_sectors = 0;
2600 uint64_t sector;
2601 int n;
2602 uint8_t * buf_old;
2603 uint8_t * buf_new;
2604 float local_progress = 0;
2605
2606 buf_old = blk_blockalign(blk, IO_BUF_SIZE);
2607 buf_new = blk_blockalign(blk, IO_BUF_SIZE);
2608
2609 num_sectors = blk_nb_sectors(blk);
2610 if (num_sectors < 0) {
2611 error_report("Could not get size of '%s': %s",
2612 filename, strerror(-num_sectors));
2613 ret = -1;
2614 goto out;
2615 }
2616 old_backing_num_sectors = blk_nb_sectors(blk_old_backing);
2617 if (old_backing_num_sectors < 0) {
2618 char backing_name[PATH_MAX];
2619
2620 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2621 error_report("Could not get size of '%s': %s",
2622 backing_name, strerror(-old_backing_num_sectors));
2623 ret = -1;
2624 goto out;
2625 }
2626 if (blk_new_backing) {
2627 new_backing_num_sectors = blk_nb_sectors(blk_new_backing);
2628 if (new_backing_num_sectors < 0) {
2629 error_report("Could not get size of '%s': %s",
2630 out_baseimg, strerror(-new_backing_num_sectors));
2631 ret = -1;
2632 goto out;
2633 }
2634 }
2635
2636 if (num_sectors != 0) {
2637 local_progress = (float)100 /
2638 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2639 }
2640
2641 for (sector = 0; sector < num_sectors; sector += n) {
2642
2643 /* How many sectors can we handle with the next read? */
2644 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2645 n = (IO_BUF_SIZE / 512);
2646 } else {
2647 n = num_sectors - sector;
2648 }
2649
2650 /* If the cluster is allocated, we don't need to take action */
2651 ret = bdrv_is_allocated(bs, sector, n, &n);
2652 if (ret < 0) {
2653 error_report("error while reading image metadata: %s",
2654 strerror(-ret));
2655 goto out;
2656 }
2657 if (ret) {
2658 continue;
2659 }
2660
2661 /*
2662 * Read old and new backing file and take into consideration that
2663 * backing files may be smaller than the COW image.
2664 */
2665 if (sector >= old_backing_num_sectors) {
2666 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2667 } else {
2668 if (sector + n > old_backing_num_sectors) {
2669 n = old_backing_num_sectors - sector;
2670 }
2671
2672 ret = blk_read(blk_old_backing, sector, buf_old, n);
2673 if (ret < 0) {
2674 error_report("error while reading from old backing file");
2675 goto out;
2676 }
2677 }
2678
2679 if (sector >= new_backing_num_sectors || !blk_new_backing) {
2680 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2681 } else {
2682 if (sector + n > new_backing_num_sectors) {
2683 n = new_backing_num_sectors - sector;
2684 }
2685
2686 ret = blk_read(blk_new_backing, sector, buf_new, n);
2687 if (ret < 0) {
2688 error_report("error while reading from new backing file");
2689 goto out;
2690 }
2691 }
2692
2693 /* If they differ, we need to write to the COW file */
2694 uint64_t written = 0;
2695
2696 while (written < n) {
2697 int pnum;
2698
2699 if (compare_sectors(buf_old + written * 512,
2700 buf_new + written * 512, n - written, &pnum))
2701 {
2702 ret = blk_write(blk, sector + written,
2703 buf_old + written * 512, pnum);
2704 if (ret < 0) {
2705 error_report("Error while writing to COW image: %s",
2706 strerror(-ret));
2707 goto out;
2708 }
2709 }
2710
2711 written += pnum;
2712 }
2713 qemu_progress_print(local_progress, 100);
2714 }
2715
2716 qemu_vfree(buf_old);
2717 qemu_vfree(buf_new);
2718 }
2719
2720 /*
2721 * Change the backing file. All clusters that are different from the old
2722 * backing file are overwritten in the COW file now, so the visible content
2723 * doesn't change when we switch the backing file.
2724 */
2725 if (out_baseimg && *out_baseimg) {
2726 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2727 } else {
2728 ret = bdrv_change_backing_file(bs, NULL, NULL);
2729 }
2730
2731 if (ret == -ENOSPC) {
2732 error_report("Could not change the backing file to '%s': No "
2733 "space left in the file header", out_baseimg);
2734 } else if (ret < 0) {
2735 error_report("Could not change the backing file to '%s': %s",
2736 out_baseimg, strerror(-ret));
2737 }
2738
2739 qemu_progress_print(100, 0);
2740 /*
2741 * TODO At this point it is possible to check if any clusters that are
2742 * allocated in the COW file are the same in the backing file. If so, they
2743 * could be dropped from the COW file. Don't do this before switching the
2744 * backing file, in case of a crash this would lead to corruption.
2745 */
2746 out:
2747 qemu_progress_end();
2748 /* Cleanup */
2749 if (!unsafe) {
2750 blk_unref(blk_old_backing);
2751 blk_unref(blk_new_backing);
2752 }
2753
2754 blk_unref(blk);
2755 if (ret) {
2756 return 1;
2757 }
2758 return 0;
2759 }
2760
2761 static int img_resize(int argc, char **argv)
2762 {
2763 Error *err = NULL;
2764 int c, ret, relative;
2765 const char *filename, *fmt, *size;
2766 int64_t n, total_size;
2767 bool quiet = false;
2768 BlockBackend *blk = NULL;
2769 QemuOpts *param;
2770 static QemuOptsList resize_options = {
2771 .name = "resize_options",
2772 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2773 .desc = {
2774 {
2775 .name = BLOCK_OPT_SIZE,
2776 .type = QEMU_OPT_SIZE,
2777 .help = "Virtual disk size"
2778 }, {
2779 /* end of list */
2780 }
2781 },
2782 };
2783
2784 /* Remove size from argv manually so that negative numbers are not treated
2785 * as options by getopt. */
2786 if (argc < 3) {
2787 error_exit("Not enough arguments");
2788 return 1;
2789 }
2790
2791 size = argv[--argc];
2792
2793 /* Parse getopt arguments */
2794 fmt = NULL;
2795 for(;;) {
2796 c = getopt(argc, argv, "f:hq");
2797 if (c == -1) {
2798 break;
2799 }
2800 switch(c) {
2801 case '?':
2802 case 'h':
2803 help();
2804 break;
2805 case 'f':
2806 fmt = optarg;
2807 break;
2808 case 'q':
2809 quiet = true;
2810 break;
2811 }
2812 }
2813 if (optind != argc - 1) {
2814 error_exit("Expecting one image file name");
2815 }
2816 filename = argv[optind++];
2817
2818 /* Choose grow, shrink, or absolute resize mode */
2819 switch (size[0]) {
2820 case '+':
2821 relative = 1;
2822 size++;
2823 break;
2824 case '-':
2825 relative = -1;
2826 size++;
2827 break;
2828 default:
2829 relative = 0;
2830 break;
2831 }
2832
2833 /* Parse size */
2834 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
2835 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err);
2836 if (err) {
2837 error_report_err(err);
2838 ret = -1;
2839 qemu_opts_del(param);
2840 goto out;
2841 }
2842 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2843 qemu_opts_del(param);
2844
2845 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2846 true, quiet);
2847 if (!blk) {
2848 ret = -1;
2849 goto out;
2850 }
2851
2852 if (relative) {
2853 total_size = blk_getlength(blk) + n * relative;
2854 } else {
2855 total_size = n;
2856 }
2857 if (total_size <= 0) {
2858 error_report("New image size must be positive");
2859 ret = -1;
2860 goto out;
2861 }
2862
2863 ret = blk_truncate(blk, total_size);
2864 switch (ret) {
2865 case 0:
2866 qprintf(quiet, "Image resized.\n");
2867 break;
2868 case -ENOTSUP:
2869 error_report("This image does not support resize");
2870 break;
2871 case -EACCES:
2872 error_report("Image is read-only");
2873 break;
2874 default:
2875 error_report("Error resizing image (%d)", -ret);
2876 break;
2877 }
2878 out:
2879 blk_unref(blk);
2880 if (ret) {
2881 return 1;
2882 }
2883 return 0;
2884 }
2885
2886 static void amend_status_cb(BlockDriverState *bs,
2887 int64_t offset, int64_t total_work_size)
2888 {
2889 qemu_progress_print(100.f * offset / total_work_size, 0);
2890 }
2891
2892 static int img_amend(int argc, char **argv)
2893 {
2894 Error *err = NULL;
2895 int c, ret = 0;
2896 char *options = NULL;
2897 QemuOptsList *create_opts = NULL;
2898 QemuOpts *opts = NULL;
2899 const char *fmt = NULL, *filename, *cache;
2900 int flags;
2901 bool quiet = false, progress = false;
2902 BlockBackend *blk = NULL;
2903 BlockDriverState *bs = NULL;
2904
2905 cache = BDRV_DEFAULT_CACHE;
2906 for (;;) {
2907 c = getopt(argc, argv, "ho:f:t:pq");
2908 if (c == -1) {
2909 break;
2910 }
2911
2912 switch (c) {
2913 case 'h':
2914 case '?':
2915 help();
2916 break;
2917 case 'o':
2918 if (!is_valid_option_list(optarg)) {
2919 error_report("Invalid option list: %s", optarg);
2920 ret = -1;
2921 goto out;
2922 }
2923 if (!options) {
2924 options = g_strdup(optarg);
2925 } else {
2926 char *old_options = options;
2927 options = g_strdup_printf("%s,%s", options, optarg);
2928 g_free(old_options);
2929 }
2930 break;
2931 case 'f':
2932 fmt = optarg;
2933 break;
2934 case 't':
2935 cache = optarg;
2936 break;
2937 case 'p':
2938 progress = true;
2939 break;
2940 case 'q':
2941 quiet = true;
2942 break;
2943 }
2944 }
2945
2946 if (!options) {
2947 error_exit("Must specify options (-o)");
2948 }
2949
2950 if (quiet) {
2951 progress = false;
2952 }
2953 qemu_progress_init(progress, 1.0);
2954
2955 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2956 if (fmt && has_help_option(options)) {
2957 /* If a format is explicitly specified (and possibly no filename is
2958 * given), print option help here */
2959 ret = print_block_option_help(filename, fmt);
2960 goto out;
2961 }
2962
2963 if (optind != argc - 1) {
2964 error_report("Expecting one image file name");
2965 ret = -1;
2966 goto out;
2967 }
2968
2969 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2970 ret = bdrv_parse_cache_flags(cache, &flags);
2971 if (ret < 0) {
2972 error_report("Invalid cache option: %s", cache);
2973 goto out;
2974 }
2975
2976 blk = img_open("image", filename, fmt, flags, true, quiet);
2977 if (!blk) {
2978 ret = -1;
2979 goto out;
2980 }
2981 bs = blk_bs(blk);
2982
2983 fmt = bs->drv->format_name;
2984
2985 if (has_help_option(options)) {
2986 /* If the format was auto-detected, print option help here */
2987 ret = print_block_option_help(filename, fmt);
2988 goto out;
2989 }
2990
2991 if (!bs->drv->create_opts) {
2992 error_report("Format driver '%s' does not support any options to amend",
2993 fmt);
2994 ret = -1;
2995 goto out;
2996 }
2997
2998 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
2999 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
3000 if (options) {
3001 qemu_opts_do_parse(opts, options, NULL, &err);
3002 if (err) {
3003 error_report("Invalid options for file format '%s'", fmt);
3004 error_free(err);
3005 ret = -1;
3006 goto out;
3007 }
3008 }
3009
3010 /* In case the driver does not call amend_status_cb() */
3011 qemu_progress_print(0.f, 0);
3012 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
3013 qemu_progress_print(100.f, 0);
3014 if (ret < 0) {
3015 error_report("Error while amending options: %s", strerror(-ret));
3016 goto out;
3017 }
3018
3019 out:
3020 qemu_progress_end();
3021
3022 blk_unref(blk);
3023 qemu_opts_del(opts);
3024 qemu_opts_free(create_opts);
3025 g_free(options);
3026
3027 if (ret) {
3028 return 1;
3029 }
3030 return 0;
3031 }
3032
3033 static const img_cmd_t img_cmds[] = {
3034 #define DEF(option, callback, arg_string) \
3035 { option, callback },
3036 #include "qemu-img-cmds.h"
3037 #undef DEF
3038 #undef GEN_DOCS
3039 { NULL, NULL, },
3040 };
3041
3042 int main(int argc, char **argv)
3043 {
3044 const img_cmd_t *cmd;
3045 const char *cmdname;
3046 Error *local_error = NULL;
3047 int c;
3048 static const struct option long_options[] = {
3049 {"help", no_argument, 0, 'h'},
3050 {"version", no_argument, 0, 'v'},
3051 {0, 0, 0, 0}
3052 };
3053
3054 #ifdef CONFIG_POSIX
3055 signal(SIGPIPE, SIG_IGN);
3056 #endif
3057
3058 error_set_progname(argv[0]);
3059 qemu_init_exec_dir(argv[0]);
3060
3061 if (qemu_init_main_loop(&local_error)) {
3062 error_report_err(local_error);
3063 exit(EXIT_FAILURE);
3064 }
3065
3066 bdrv_init();
3067 if (argc < 2) {
3068 error_exit("Not enough arguments");
3069 }
3070 cmdname = argv[1];
3071
3072 /* find the command */
3073 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
3074 if (!strcmp(cmdname, cmd->name)) {
3075 return cmd->handler(argc - 1, argv + 1);
3076 }
3077 }
3078
3079 c = getopt_long(argc, argv, "h", long_options, NULL);
3080
3081 if (c == 'h') {
3082 help();
3083 }
3084 if (c == 'v') {
3085 printf(QEMU_IMG_VERSION);
3086 return 0;
3087 }
3088
3089 /* not found */
3090 error_exit("Command not found: %s", cmdname);
3091 }
CRIS target port of Qemu