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cpu: Add missing documentation for some CPUClass methods
[qemu/qmp-unstable.git] / qemu-img.c
blob5af6f455dfbe396ac3ef680854f28cc641da0dc0
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 bool res;
980 int 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 blk: BlockBackend for the image
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(BlockBackend *blk, 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 = blk_read(blk, 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 ret = 2;
1130 goto out3;
1131 }
1132 bs1 = blk_bs(blk1);
1133
1134 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet);
1135 if (!blk2) {
1136 ret = 2;
1137 goto out2;
1138 }
1139 bs2 = blk_bs(blk2);
1140
1141 buf1 = blk_blockalign(blk1, IO_BUF_SIZE);
1142 buf2 = blk_blockalign(blk2, IO_BUF_SIZE);
1143 total_sectors1 = blk_nb_sectors(blk1);
1144 if (total_sectors1 < 0) {
1145 error_report("Can't get size of %s: %s",
1146 filename1, strerror(-total_sectors1));
1147 ret = 4;
1148 goto out;
1149 }
1150 total_sectors2 = blk_nb_sectors(blk2);
1151 if (total_sectors2 < 0) {
1152 error_report("Can't get size of %s: %s",
1153 filename2, strerror(-total_sectors2));
1154 ret = 4;
1155 goto out;
1156 }
1157 total_sectors = MIN(total_sectors1, total_sectors2);
1158 progress_base = MAX(total_sectors1, total_sectors2);
1159
1160 qemu_progress_print(0, 100);
1161
1162 if (strict && total_sectors1 != total_sectors2) {
1163 ret = 1;
1164 qprintf(quiet, "Strict mode: Image size mismatch!\n");
1165 goto out;
1166 }
1167
1168 for (;;) {
1169 nb_sectors = sectors_to_process(total_sectors, sector_num);
1170 if (nb_sectors <= 0) {
1171 break;
1172 }
1173 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
1174 &pnum1);
1175 if (allocated1 < 0) {
1176 ret = 3;
1177 error_report("Sector allocation test failed for %s", filename1);
1178 goto out;
1179 }
1180
1181 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
1182 &pnum2);
1183 if (allocated2 < 0) {
1184 ret = 3;
1185 error_report("Sector allocation test failed for %s", filename2);
1186 goto out;
1187 }
1188 nb_sectors = MIN(pnum1, pnum2);
1189
1190 if (allocated1 == allocated2) {
1191 if (allocated1) {
1192 ret = blk_read(blk1, sector_num, buf1, nb_sectors);
1193 if (ret < 0) {
1194 error_report("Error while reading offset %" PRId64 " of %s:"
1195 " %s", sectors_to_bytes(sector_num), filename1,
1196 strerror(-ret));
1197 ret = 4;
1198 goto out;
1199 }
1200 ret = blk_read(blk2, sector_num, buf2, nb_sectors);
1201 if (ret < 0) {
1202 error_report("Error while reading offset %" PRId64
1203 " of %s: %s", sectors_to_bytes(sector_num),
1204 filename2, strerror(-ret));
1205 ret = 4;
1206 goto out;
1207 }
1208 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum);
1209 if (ret || pnum != nb_sectors) {
1210 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1211 sectors_to_bytes(
1212 ret ? sector_num : sector_num + pnum));
1213 ret = 1;
1214 goto out;
1215 }
1216 }
1217 } else {
1218 if (strict) {
1219 ret = 1;
1220 qprintf(quiet, "Strict mode: Offset %" PRId64
1221 " allocation mismatch!\n",
1222 sectors_to_bytes(sector_num));
1223 goto out;
1224 }
1225
1226 if (allocated1) {
1227 ret = check_empty_sectors(blk1, sector_num, nb_sectors,
1228 filename1, buf1, quiet);
1229 } else {
1230 ret = check_empty_sectors(blk2, sector_num, nb_sectors,
1231 filename2, buf1, quiet);
1232 }
1233 if (ret) {
1234 if (ret < 0) {
1235 error_report("Error while reading offset %" PRId64 ": %s",
1236 sectors_to_bytes(sector_num), strerror(-ret));
1237 ret = 4;
1238 }
1239 goto out;
1240 }
1241 }
1242 sector_num += nb_sectors;
1243 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1244 }
1245
1246 if (total_sectors1 != total_sectors2) {
1247 BlockBackend *blk_over;
1248 int64_t total_sectors_over;
1249 const char *filename_over;
1250
1251 qprintf(quiet, "Warning: Image size mismatch!\n");
1252 if (total_sectors1 > total_sectors2) {
1253 total_sectors_over = total_sectors1;
1254 blk_over = blk1;
1255 filename_over = filename1;
1256 } else {
1257 total_sectors_over = total_sectors2;
1258 blk_over = blk2;
1259 filename_over = filename2;
1260 }
1261
1262 for (;;) {
1263 nb_sectors = sectors_to_process(total_sectors_over, sector_num);
1264 if (nb_sectors <= 0) {
1265 break;
1266 }
1267 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num,
1268 nb_sectors, &pnum);
1269 if (ret < 0) {
1270 ret = 3;
1271 error_report("Sector allocation test failed for %s",
1272 filename_over);
1273 goto out;
1274
1275 }
1276 nb_sectors = pnum;
1277 if (ret) {
1278 ret = check_empty_sectors(blk_over, sector_num, nb_sectors,
1279 filename_over, buf1, quiet);
1280 if (ret) {
1281 if (ret < 0) {
1282 error_report("Error while reading offset %" PRId64
1283 " of %s: %s", sectors_to_bytes(sector_num),
1284 filename_over, strerror(-ret));
1285 ret = 4;
1286 }
1287 goto out;
1288 }
1289 }
1290 sector_num += nb_sectors;
1291 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1292 }
1293 }
1294
1295 qprintf(quiet, "Images are identical.\n");
1296 ret = 0;
1297
1298 out:
1299 qemu_vfree(buf1);
1300 qemu_vfree(buf2);
1301 blk_unref(blk2);
1302 out2:
1303 blk_unref(blk1);
1304 out3:
1305 qemu_progress_end();
1306 return ret;
1307 }
1308
1309 static int img_convert(int argc, char **argv)
1310 {
1311 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create;
1312 int64_t ret = 0;
1313 int progress = 0, flags, src_flags;
1314 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename;
1315 BlockDriver *drv, *proto_drv;
1316 BlockBackend **blk = NULL, *out_blk = NULL;
1317 BlockDriverState **bs = NULL, *out_bs = NULL;
1318 int64_t total_sectors, nb_sectors, sector_num, bs_offset;
1319 int64_t *bs_sectors = NULL;
1320 uint8_t * buf = NULL;
1321 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
1322 const uint8_t *buf1;
1323 BlockDriverInfo bdi;
1324 QemuOpts *opts = NULL;
1325 QemuOptsList *create_opts = NULL;
1326 const char *out_baseimg_param;
1327 char *options = NULL;
1328 const char *snapshot_name = NULL;
1329 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
1330 bool quiet = false;
1331 Error *local_err = NULL;
1332 QemuOpts *sn_opts = NULL;
1333
1334 fmt = NULL;
1335 out_fmt = "raw";
1336 cache = "unsafe";
1337 src_cache = BDRV_DEFAULT_CACHE;
1338 out_baseimg = NULL;
1339 compress = 0;
1340 skip_create = 0;
1341 for(;;) {
1342 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn");
1343 if (c == -1) {
1344 break;
1345 }
1346 switch(c) {
1347 case '?':
1348 case 'h':
1349 help();
1350 break;
1351 case 'f':
1352 fmt = optarg;
1353 break;
1354 case 'O':
1355 out_fmt = optarg;
1356 break;
1357 case 'B':
1358 out_baseimg = optarg;
1359 break;
1360 case 'c':
1361 compress = 1;
1362 break;
1363 case 'e':
1364 error_report("option -e is deprecated, please use \'-o "
1365 "encryption\' instead!");
1366 ret = -1;
1367 goto fail_getopt;
1368 case '6':
1369 error_report("option -6 is deprecated, please use \'-o "
1370 "compat6\' instead!");
1371 ret = -1;
1372 goto fail_getopt;
1373 case 'o':
1374 if (!is_valid_option_list(optarg)) {
1375 error_report("Invalid option list: %s", optarg);
1376 ret = -1;
1377 goto fail_getopt;
1378 }
1379 if (!options) {
1380 options = g_strdup(optarg);
1381 } else {
1382 char *old_options = options;
1383 options = g_strdup_printf("%s,%s", options, optarg);
1384 g_free(old_options);
1385 }
1386 break;
1387 case 's':
1388 snapshot_name = optarg;
1389 break;
1390 case 'l':
1391 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
1392 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0);
1393 if (!sn_opts) {
1394 error_report("Failed in parsing snapshot param '%s'",
1395 optarg);
1396 ret = -1;
1397 goto fail_getopt;
1398 }
1399 } else {
1400 snapshot_name = optarg;
1401 }
1402 break;
1403 case 'S':
1404 {
1405 int64_t sval;
1406 char *end;
1407 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B);
1408 if (sval < 0 || *end) {
1409 error_report("Invalid minimum zero buffer size for sparse output specified");
1410 ret = -1;
1411 goto fail_getopt;
1412 }
1413
1414 min_sparse = sval / BDRV_SECTOR_SIZE;
1415 break;
1416 }
1417 case 'p':
1418 progress = 1;
1419 break;
1420 case 't':
1421 cache = optarg;
1422 break;
1423 case 'T':
1424 src_cache = optarg;
1425 break;
1426 case 'q':
1427 quiet = true;
1428 break;
1429 case 'n':
1430 skip_create = 1;
1431 break;
1432 }
1433 }
1434
1435 /* Initialize before goto out */
1436 if (quiet) {
1437 progress = 0;
1438 }
1439 qemu_progress_init(progress, 1.0);
1440
1441
1442 bs_n = argc - optind - 1;
1443 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL;
1444
1445 if (options && has_help_option(options)) {
1446 ret = print_block_option_help(out_filename, out_fmt);
1447 goto out;
1448 }
1449
1450 if (bs_n < 1) {
1451 error_exit("Must specify image file name");
1452 }
1453
1454
1455 if (bs_n > 1 && out_baseimg) {
1456 error_report("-B makes no sense when concatenating multiple input "
1457 "images");
1458 ret = -1;
1459 goto out;
1460 }
1461
1462 src_flags = BDRV_O_FLAGS;
1463 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
1464 if (ret < 0) {
1465 error_report("Invalid source cache option: %s", src_cache);
1466 goto out;
1467 }
1468
1469 qemu_progress_print(0, 100);
1470
1471 blk = g_new0(BlockBackend *, bs_n);
1472 bs = g_new0(BlockDriverState *, bs_n);
1473 bs_sectors = g_new(int64_t, bs_n);
1474
1475 total_sectors = 0;
1476 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1477 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i)
1478 : g_strdup("source");
1479 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags,
1480 true, quiet);
1481 g_free(id);
1482 if (!blk[bs_i]) {
1483 ret = -1;
1484 goto out;
1485 }
1486 bs[bs_i] = blk_bs(blk[bs_i]);
1487 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]);
1488 if (bs_sectors[bs_i] < 0) {
1489 error_report("Could not get size of %s: %s",
1490 argv[optind + bs_i], strerror(-bs_sectors[bs_i]));
1491 ret = -1;
1492 goto out;
1493 }
1494 total_sectors += bs_sectors[bs_i];
1495 }
1496
1497 if (sn_opts) {
1498 ret = bdrv_snapshot_load_tmp(bs[0],
1499 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
1500 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
1501 &local_err);
1502 } else if (snapshot_name != NULL) {
1503 if (bs_n > 1) {
1504 error_report("No support for concatenating multiple snapshot");
1505 ret = -1;
1506 goto out;
1507 }
1508
1509 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err);
1510 }
1511 if (local_err) {
1512 error_report("Failed to load snapshot: %s",
1513 error_get_pretty(local_err));
1514 error_free(local_err);
1515 ret = -1;
1516 goto out;
1517 }
1518
1519 /* Find driver and parse its options */
1520 drv = bdrv_find_format(out_fmt);
1521 if (!drv) {
1522 error_report("Unknown file format '%s'", out_fmt);
1523 ret = -1;
1524 goto out;
1525 }
1526
1527 proto_drv = bdrv_find_protocol(out_filename, true, &local_err);
1528 if (!proto_drv) {
1529 qerror_report_err(local_err);
1530 error_free(local_err);
1531 ret = -1;
1532 goto out;
1533 }
1534
1535 if (!skip_create) {
1536 if (!drv->create_opts) {
1537 error_report("Format driver '%s' does not support image creation",
1538 drv->format_name);
1539 ret = -1;
1540 goto out;
1541 }
1542
1543 if (!proto_drv->create_opts) {
1544 error_report("Protocol driver '%s' does not support image creation",
1545 proto_drv->format_name);
1546 ret = -1;
1547 goto out;
1548 }
1549
1550 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1551 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
1552
1553 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1554 if (options) {
1555 qemu_opts_do_parse(opts, options, NULL, &local_err);
1556 if (local_err) {
1557 error_report("Invalid options for file format '%s'", out_fmt);
1558 error_free(local_err);
1559 ret = -1;
1560 goto out;
1561 }
1562 }
1563
1564 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512,
1565 &error_abort);
1566 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
1567 if (ret < 0) {
1568 goto out;
1569 }
1570 }
1571
1572 /* Get backing file name if -o backing_file was used */
1573 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
1574 if (out_baseimg_param) {
1575 out_baseimg = out_baseimg_param;
1576 }
1577
1578 /* Check if compression is supported */
1579 if (compress) {
1580 bool encryption =
1581 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1582 const char *preallocation =
1583 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
1584
1585 if (!drv->bdrv_write_compressed) {
1586 error_report("Compression not supported for this file format");
1587 ret = -1;
1588 goto out;
1589 }
1590
1591 if (encryption) {
1592 error_report("Compression and encryption not supported at "
1593 "the same time");
1594 ret = -1;
1595 goto out;
1596 }
1597
1598 if (preallocation
1599 && strcmp(preallocation, "off"))
1600 {
1601 error_report("Compression and preallocation not supported at "
1602 "the same time");
1603 ret = -1;
1604 goto out;
1605 }
1606 }
1607
1608 if (!skip_create) {
1609 /* Create the new image */
1610 ret = bdrv_create(drv, out_filename, opts, &local_err);
1611 if (ret < 0) {
1612 error_report("%s: error while converting %s: %s",
1613 out_filename, out_fmt, error_get_pretty(local_err));
1614 error_free(local_err);
1615 goto out;
1616 }
1617 }
1618
1619 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
1620 ret = bdrv_parse_cache_flags(cache, &flags);
1621 if (ret < 0) {
1622 error_report("Invalid cache option: %s", cache);
1623 goto out;
1624 }
1625
1626 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1627 if (!out_blk) {
1628 ret = -1;
1629 goto out;
1630 }
1631 out_bs = blk_bs(out_blk);
1632
1633 bs_i = 0;
1634 bs_offset = 0;
1635
1636 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1637 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1638 * as maximum. */
1639 bufsectors = MIN(32768,
1640 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1641 out_bs->bl.discard_alignment))
1642 );
1643
1644 buf = blk_blockalign(out_blk, bufsectors * BDRV_SECTOR_SIZE);
1645
1646 if (skip_create) {
1647 int64_t output_sectors = blk_nb_sectors(out_blk);
1648 if (output_sectors < 0) {
1649 error_report("unable to get output image length: %s",
1650 strerror(-output_sectors));
1651 ret = -1;
1652 goto out;
1653 } else if (output_sectors < total_sectors) {
1654 error_report("output file is smaller than input file");
1655 ret = -1;
1656 goto out;
1657 }
1658 }
1659
1660 cluster_sectors = 0;
1661 ret = bdrv_get_info(out_bs, &bdi);
1662 if (ret < 0) {
1663 if (compress) {
1664 error_report("could not get block driver info");
1665 goto out;
1666 }
1667 } else {
1668 compress = compress || bdi.needs_compressed_writes;
1669 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1670 }
1671
1672 if (compress) {
1673 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
1674 error_report("invalid cluster size");
1675 ret = -1;
1676 goto out;
1677 }
1678 sector_num = 0;
1679
1680 nb_sectors = total_sectors;
1681
1682 for(;;) {
1683 int64_t bs_num;
1684 int remainder;
1685 uint8_t *buf2;
1686
1687 nb_sectors = total_sectors - sector_num;
1688 if (nb_sectors <= 0)
1689 break;
1690 if (nb_sectors >= cluster_sectors)
1691 n = cluster_sectors;
1692 else
1693 n = nb_sectors;
1694
1695 bs_num = sector_num - bs_offset;
1696 assert (bs_num >= 0);
1697 remainder = n;
1698 buf2 = buf;
1699 while (remainder > 0) {
1700 int nlow;
1701 while (bs_num == bs_sectors[bs_i]) {
1702 bs_offset += bs_sectors[bs_i];
1703 bs_i++;
1704 assert (bs_i < bs_n);
1705 bs_num = 0;
1706 /* printf("changing part: sector_num=%" PRId64 ", "
1707 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
1708 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1709 }
1710 assert (bs_num < bs_sectors[bs_i]);
1711
1712 nlow = remainder > bs_sectors[bs_i] - bs_num
1713 ? bs_sectors[bs_i] - bs_num : remainder;
1714
1715 ret = blk_read(blk[bs_i], bs_num, buf2, nlow);
1716 if (ret < 0) {
1717 error_report("error while reading sector %" PRId64 ": %s",
1718 bs_num, strerror(-ret));
1719 goto out;
1720 }
1721
1722 buf2 += nlow * 512;
1723 bs_num += nlow;
1724
1725 remainder -= nlow;
1726 }
1727 assert (remainder == 0);
1728
1729 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1730 ret = blk_write_compressed(out_blk, sector_num, buf, n);
1731 if (ret != 0) {
1732 error_report("error while compressing sector %" PRId64
1733 ": %s", sector_num, strerror(-ret));
1734 goto out;
1735 }
1736 }
1737 sector_num += n;
1738 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
1739 }
1740 /* signal EOF to align */
1741 blk_write_compressed(out_blk, 0, NULL, 0);
1742 } else {
1743 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1744 bool count_allocated_sectors;
1745 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
1746
1747 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1748 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1749 if (ret < 0) {
1750 goto out;
1751 }
1752 has_zero_init = 1;
1753 }
1754
1755 sectors_to_read = total_sectors;
1756 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1757 restart:
1758 sector_num = 0; // total number of sectors converted so far
1759 sectors_read = 0;
1760 sector_num_next_status = 0;
1761
1762 for(;;) {
1763 nb_sectors = total_sectors - sector_num;
1764 if (nb_sectors <= 0) {
1765 if (count_allocated_sectors) {
1766 sectors_to_read = sectors_read;
1767 count_allocated_sectors = false;
1768 goto restart;
1769 }
1770 ret = 0;
1771 break;
1772 }
1773
1774 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1775 bs_offset += bs_sectors[bs_i];
1776 bs_i ++;
1777 assert (bs_i < bs_n);
1778 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1779 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
1780 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1781 }
1782
1783 if ((out_baseimg || has_zero_init) &&
1784 sector_num >= sector_num_next_status) {
1785 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1786 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1787 n, &n1);
1788 if (ret < 0) {
1789 error_report("error while reading block status of sector %"
1790 PRId64 ": %s", sector_num - bs_offset,
1791 strerror(-ret));
1792 goto out;
1793 }
1794 /* If the output image is zero initialized, we are not working
1795 * on a shared base and the input is zero we can skip the next
1796 * n1 sectors */
1797 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
1798 sector_num += n1;
1799 continue;
1800 }
1801 /* If the output image is being created as a copy on write
1802 * image, assume that sectors which are unallocated in the
1803 * input image are present in both the output's and input's
1804 * base images (no need to copy them). */
1805 if (out_baseimg) {
1806 if (!(ret & BDRV_BLOCK_DATA)) {
1807 sector_num += n1;
1808 continue;
1809 }
1810 /* The next 'n1' sectors are allocated in the input image.
1811 * Copy only those as they may be followed by unallocated
1812 * sectors. */
1813 nb_sectors = n1;
1814 }
1815 /* avoid redundant callouts to get_block_status */
1816 sector_num_next_status = sector_num + n1;
1817 }
1818
1819 n = MIN(nb_sectors, bufsectors);
1820
1821 /* round down request length to an aligned sector, but
1822 * do not bother doing this on short requests. They happen
1823 * when we found an all-zero area, and the next sector to
1824 * write will not be sector_num + n. */
1825 if (cluster_sectors > 0 && n >= cluster_sectors) {
1826 int64_t next_aligned_sector = (sector_num + n);
1827 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1828 if (sector_num + n > next_aligned_sector) {
1829 n = next_aligned_sector - sector_num;
1830 }
1831 }
1832
1833 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
1834
1835 sectors_read += n;
1836 if (count_allocated_sectors) {
1837 sector_num += n;
1838 continue;
1839 }
1840
1841 n1 = n;
1842 ret = blk_read(blk[bs_i], sector_num - bs_offset, buf, n);
1843 if (ret < 0) {
1844 error_report("error while reading sector %" PRId64 ": %s",
1845 sector_num - bs_offset, strerror(-ret));
1846 goto out;
1847 }
1848 /* NOTE: at the same time we convert, we do not write zero
1849 sectors to have a chance to compress the image. Ideally, we
1850 should add a specific call to have the info to go faster */
1851 buf1 = buf;
1852 while (n > 0) {
1853 if (!has_zero_init ||
1854 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
1855 ret = blk_write(out_blk, sector_num, buf1, n1);
1856 if (ret < 0) {
1857 error_report("error while writing sector %" PRId64
1858 ": %s", sector_num, strerror(-ret));
1859 goto out;
1860 }
1861 }
1862 sector_num += n1;
1863 n -= n1;
1864 buf1 += n1 * 512;
1865 }
1866 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
1867 }
1868 }
1869 out:
1870 if (!ret) {
1871 qemu_progress_print(100, 0);
1872 }
1873 qemu_progress_end();
1874 qemu_opts_del(opts);
1875 qemu_opts_free(create_opts);
1876 qemu_vfree(buf);
1877 qemu_opts_del(sn_opts);
1878 blk_unref(out_blk);
1879 g_free(bs);
1880 if (blk) {
1881 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1882 blk_unref(blk[bs_i]);
1883 }
1884 g_free(blk);
1885 }
1886 g_free(bs_sectors);
1887 fail_getopt:
1888 g_free(options);
1889
1890 if (ret) {
1891 return 1;
1892 }
1893 return 0;
1894 }
1895
1896
1897 static void dump_snapshots(BlockDriverState *bs)
1898 {
1899 QEMUSnapshotInfo *sn_tab, *sn;
1900 int nb_sns, i;
1901
1902 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1903 if (nb_sns <= 0)
1904 return;
1905 printf("Snapshot list:\n");
1906 bdrv_snapshot_dump(fprintf, stdout, NULL);
1907 printf("\n");
1908 for(i = 0; i < nb_sns; i++) {
1909 sn = &sn_tab[i];
1910 bdrv_snapshot_dump(fprintf, stdout, sn);
1911 printf("\n");
1912 }
1913 g_free(sn_tab);
1914 }
1915
1916 static void dump_json_image_info_list(ImageInfoList *list)
1917 {
1918 Error *local_err = NULL;
1919 QString *str;
1920 QmpOutputVisitor *ov = qmp_output_visitor_new();
1921 QObject *obj;
1922 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
1923 &list, NULL, &local_err);
1924 obj = qmp_output_get_qobject(ov);
1925 str = qobject_to_json_pretty(obj);
1926 assert(str != NULL);
1927 printf("%s\n", qstring_get_str(str));
1928 qobject_decref(obj);
1929 qmp_output_visitor_cleanup(ov);
1930 QDECREF(str);
1931 }
1932
1933 static void dump_json_image_info(ImageInfo *info)
1934 {
1935 Error *local_err = NULL;
1936 QString *str;
1937 QmpOutputVisitor *ov = qmp_output_visitor_new();
1938 QObject *obj;
1939 visit_type_ImageInfo(qmp_output_get_visitor(ov),
1940 &info, NULL, &local_err);
1941 obj = qmp_output_get_qobject(ov);
1942 str = qobject_to_json_pretty(obj);
1943 assert(str != NULL);
1944 printf("%s\n", qstring_get_str(str));
1945 qobject_decref(obj);
1946 qmp_output_visitor_cleanup(ov);
1947 QDECREF(str);
1948 }
1949
1950 static void dump_human_image_info_list(ImageInfoList *list)
1951 {
1952 ImageInfoList *elem;
1953 bool delim = false;
1954
1955 for (elem = list; elem; elem = elem->next) {
1956 if (delim) {
1957 printf("\n");
1958 }
1959 delim = true;
1960
1961 bdrv_image_info_dump(fprintf, stdout, elem->value);
1962 }
1963 }
1964
1965 static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1966 {
1967 return strcmp(a, b) == 0;
1968 }
1969
1970 /**
1971 * Open an image file chain and return an ImageInfoList
1972 *
1973 * @filename: topmost image filename
1974 * @fmt: topmost image format (may be NULL to autodetect)
1975 * @chain: true - enumerate entire backing file chain
1976 * false - only topmost image file
1977 *
1978 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1979 * image file. If there was an error a message will have been printed to
1980 * stderr.
1981 */
1982 static ImageInfoList *collect_image_info_list(const char *filename,
1983 const char *fmt,
1984 bool chain)
1985 {
1986 ImageInfoList *head = NULL;
1987 ImageInfoList **last = &head;
1988 GHashTable *filenames;
1989 Error *err = NULL;
1990
1991 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1992
1993 while (filename) {
1994 BlockBackend *blk;
1995 BlockDriverState *bs;
1996 ImageInfo *info;
1997 ImageInfoList *elem;
1998
1999 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
2000 error_report("Backing file '%s' creates an infinite loop.",
2001 filename);
2002 goto err;
2003 }
2004 g_hash_table_insert(filenames, (gpointer)filename, NULL);
2005
2006 blk = img_open("image", filename, fmt,
2007 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
2008 if (!blk) {
2009 goto err;
2010 }
2011 bs = blk_bs(blk);
2012
2013 bdrv_query_image_info(bs, &info, &err);
2014 if (err) {
2015 error_report_err(err);
2016 blk_unref(blk);
2017 goto err;
2018 }
2019
2020 elem = g_new0(ImageInfoList, 1);
2021 elem->value = info;
2022 *last = elem;
2023 last = &elem->next;
2024
2025 blk_unref(blk);
2026
2027 filename = fmt = NULL;
2028 if (chain) {
2029 if (info->has_full_backing_filename) {
2030 filename = info->full_backing_filename;
2031 } else if (info->has_backing_filename) {
2032 filename = info->backing_filename;
2033 }
2034 if (info->has_backing_filename_format) {
2035 fmt = info->backing_filename_format;
2036 }
2037 }
2038 }
2039 g_hash_table_destroy(filenames);
2040 return head;
2041
2042 err:
2043 qapi_free_ImageInfoList(head);
2044 g_hash_table_destroy(filenames);
2045 return NULL;
2046 }
2047
2048 static int img_info(int argc, char **argv)
2049 {
2050 int c;
2051 OutputFormat output_format = OFORMAT_HUMAN;
2052 bool chain = false;
2053 const char *filename, *fmt, *output;
2054 ImageInfoList *list;
2055
2056 fmt = NULL;
2057 output = NULL;
2058 for(;;) {
2059 int option_index = 0;
2060 static const struct option long_options[] = {
2061 {"help", no_argument, 0, 'h'},
2062 {"format", required_argument, 0, 'f'},
2063 {"output", required_argument, 0, OPTION_OUTPUT},
2064 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
2065 {0, 0, 0, 0}
2066 };
2067 c = getopt_long(argc, argv, "f:h",
2068 long_options, &option_index);
2069 if (c == -1) {
2070 break;
2071 }
2072 switch(c) {
2073 case '?':
2074 case 'h':
2075 help();
2076 break;
2077 case 'f':
2078 fmt = optarg;
2079 break;
2080 case OPTION_OUTPUT:
2081 output = optarg;
2082 break;
2083 case OPTION_BACKING_CHAIN:
2084 chain = true;
2085 break;
2086 }
2087 }
2088 if (optind != argc - 1) {
2089 error_exit("Expecting one image file name");
2090 }
2091 filename = argv[optind++];
2092
2093 if (output && !strcmp(output, "json")) {
2094 output_format = OFORMAT_JSON;
2095 } else if (output && !strcmp(output, "human")) {
2096 output_format = OFORMAT_HUMAN;
2097 } else if (output) {
2098 error_report("--output must be used with human or json as argument.");
2099 return 1;
2100 }
2101
2102 list = collect_image_info_list(filename, fmt, chain);
2103 if (!list) {
2104 return 1;
2105 }
2106
2107 switch (output_format) {
2108 case OFORMAT_HUMAN:
2109 dump_human_image_info_list(list);
2110 break;
2111 case OFORMAT_JSON:
2112 if (chain) {
2113 dump_json_image_info_list(list);
2114 } else {
2115 dump_json_image_info(list->value);
2116 }
2117 break;
2118 }
2119
2120 qapi_free_ImageInfoList(list);
2121 return 0;
2122 }
2123
2124
2125 typedef struct MapEntry {
2126 int flags;
2127 int depth;
2128 int64_t start;
2129 int64_t length;
2130 int64_t offset;
2131 BlockDriverState *bs;
2132 } MapEntry;
2133
2134 static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2135 MapEntry *next)
2136 {
2137 switch (output_format) {
2138 case OFORMAT_HUMAN:
2139 if ((e->flags & BDRV_BLOCK_DATA) &&
2140 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2141 error_report("File contains external, encrypted or compressed clusters.");
2142 exit(1);
2143 }
2144 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2145 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2146 e->start, e->length, e->offset, e->bs->filename);
2147 }
2148 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2149 * Modify the flags here to allow more coalescing.
2150 */
2151 if (next &&
2152 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2153 next->flags &= ~BDRV_BLOCK_DATA;
2154 next->flags |= BDRV_BLOCK_ZERO;
2155 }
2156 break;
2157 case OFORMAT_JSON:
2158 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2159 " \"zero\": %s, \"data\": %s",
2160 (e->start == 0 ? "[" : ",\n"),
2161 e->start, e->length, e->depth,
2162 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2163 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2164 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
2165 printf(", \"offset\": %"PRId64"", e->offset);
2166 }
2167 putchar('}');
2168
2169 if (!next) {
2170 printf("]\n");
2171 }
2172 break;
2173 }
2174 }
2175
2176 static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2177 int nb_sectors, MapEntry *e)
2178 {
2179 int64_t ret;
2180 int depth;
2181
2182 /* As an optimization, we could cache the current range of unallocated
2183 * clusters in each file of the chain, and avoid querying the same
2184 * range repeatedly.
2185 */
2186
2187 depth = 0;
2188 for (;;) {
2189 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2190 if (ret < 0) {
2191 return ret;
2192 }
2193 assert(nb_sectors);
2194 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2195 break;
2196 }
2197 bs = bs->backing_hd;
2198 if (bs == NULL) {
2199 ret = 0;
2200 break;
2201 }
2202
2203 depth++;
2204 }
2205
2206 e->start = sector_num * BDRV_SECTOR_SIZE;
2207 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2208 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2209 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2210 e->depth = depth;
2211 e->bs = bs;
2212 return 0;
2213 }
2214
2215 static int img_map(int argc, char **argv)
2216 {
2217 int c;
2218 OutputFormat output_format = OFORMAT_HUMAN;
2219 BlockBackend *blk;
2220 BlockDriverState *bs;
2221 const char *filename, *fmt, *output;
2222 int64_t length;
2223 MapEntry curr = { .length = 0 }, next;
2224 int ret = 0;
2225
2226 fmt = NULL;
2227 output = NULL;
2228 for (;;) {
2229 int option_index = 0;
2230 static const struct option long_options[] = {
2231 {"help", no_argument, 0, 'h'},
2232 {"format", required_argument, 0, 'f'},
2233 {"output", required_argument, 0, OPTION_OUTPUT},
2234 {0, 0, 0, 0}
2235 };
2236 c = getopt_long(argc, argv, "f:h",
2237 long_options, &option_index);
2238 if (c == -1) {
2239 break;
2240 }
2241 switch (c) {
2242 case '?':
2243 case 'h':
2244 help();
2245 break;
2246 case 'f':
2247 fmt = optarg;
2248 break;
2249 case OPTION_OUTPUT:
2250 output = optarg;
2251 break;
2252 }
2253 }
2254 if (optind != argc - 1) {
2255 error_exit("Expecting one image file name");
2256 }
2257 filename = argv[optind];
2258
2259 if (output && !strcmp(output, "json")) {
2260 output_format = OFORMAT_JSON;
2261 } else if (output && !strcmp(output, "human")) {
2262 output_format = OFORMAT_HUMAN;
2263 } else if (output) {
2264 error_report("--output must be used with human or json as argument.");
2265 return 1;
2266 }
2267
2268 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2269 if (!blk) {
2270 return 1;
2271 }
2272 bs = blk_bs(blk);
2273
2274 if (output_format == OFORMAT_HUMAN) {
2275 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2276 }
2277
2278 length = blk_getlength(blk);
2279 while (curr.start + curr.length < length) {
2280 int64_t nsectors_left;
2281 int64_t sector_num;
2282 int n;
2283
2284 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2285
2286 /* Probe up to 1 GiB at a time. */
2287 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2288 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2289 ret = get_block_status(bs, sector_num, n, &next);
2290
2291 if (ret < 0) {
2292 error_report("Could not read file metadata: %s", strerror(-ret));
2293 goto out;
2294 }
2295
2296 if (curr.length != 0 && curr.flags == next.flags &&
2297 curr.depth == next.depth &&
2298 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2299 curr.offset + curr.length == next.offset)) {
2300 curr.length += next.length;
2301 continue;
2302 }
2303
2304 if (curr.length > 0) {
2305 dump_map_entry(output_format, &curr, &next);
2306 }
2307 curr = next;
2308 }
2309
2310 dump_map_entry(output_format, &curr, NULL);
2311
2312 out:
2313 blk_unref(blk);
2314 return ret < 0;
2315 }
2316
2317 #define SNAPSHOT_LIST 1
2318 #define SNAPSHOT_CREATE 2
2319 #define SNAPSHOT_APPLY 3
2320 #define SNAPSHOT_DELETE 4
2321
2322 static int img_snapshot(int argc, char **argv)
2323 {
2324 BlockBackend *blk;
2325 BlockDriverState *bs;
2326 QEMUSnapshotInfo sn;
2327 char *filename, *snapshot_name = NULL;
2328 int c, ret = 0, bdrv_oflags;
2329 int action = 0;
2330 qemu_timeval tv;
2331 bool quiet = false;
2332 Error *err = NULL;
2333
2334 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
2335 /* Parse commandline parameters */
2336 for(;;) {
2337 c = getopt(argc, argv, "la:c:d:hq");
2338 if (c == -1) {
2339 break;
2340 }
2341 switch(c) {
2342 case '?':
2343 case 'h':
2344 help();
2345 return 0;
2346 case 'l':
2347 if (action) {
2348 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2349 return 0;
2350 }
2351 action = SNAPSHOT_LIST;
2352 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
2353 break;
2354 case 'a':
2355 if (action) {
2356 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2357 return 0;
2358 }
2359 action = SNAPSHOT_APPLY;
2360 snapshot_name = optarg;
2361 break;
2362 case 'c':
2363 if (action) {
2364 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2365 return 0;
2366 }
2367 action = SNAPSHOT_CREATE;
2368 snapshot_name = optarg;
2369 break;
2370 case 'd':
2371 if (action) {
2372 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2373 return 0;
2374 }
2375 action = SNAPSHOT_DELETE;
2376 snapshot_name = optarg;
2377 break;
2378 case 'q':
2379 quiet = true;
2380 break;
2381 }
2382 }
2383
2384 if (optind != argc - 1) {
2385 error_exit("Expecting one image file name");
2386 }
2387 filename = argv[optind++];
2388
2389 /* Open the image */
2390 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2391 if (!blk) {
2392 return 1;
2393 }
2394 bs = blk_bs(blk);
2395
2396 /* Perform the requested action */
2397 switch(action) {
2398 case SNAPSHOT_LIST:
2399 dump_snapshots(bs);
2400 break;
2401
2402 case SNAPSHOT_CREATE:
2403 memset(&sn, 0, sizeof(sn));
2404 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2405
2406 qemu_gettimeofday(&tv);
2407 sn.date_sec = tv.tv_sec;
2408 sn.date_nsec = tv.tv_usec * 1000;
2409
2410 ret = bdrv_snapshot_create(bs, &sn);
2411 if (ret) {
2412 error_report("Could not create snapshot '%s': %d (%s)",
2413 snapshot_name, ret, strerror(-ret));
2414 }
2415 break;
2416
2417 case SNAPSHOT_APPLY:
2418 ret = bdrv_snapshot_goto(bs, snapshot_name);
2419 if (ret) {
2420 error_report("Could not apply snapshot '%s': %d (%s)",
2421 snapshot_name, ret, strerror(-ret));
2422 }
2423 break;
2424
2425 case SNAPSHOT_DELETE:
2426 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
2427 if (err) {
2428 error_report("Could not delete snapshot '%s': (%s)",
2429 snapshot_name, error_get_pretty(err));
2430 error_free(err);
2431 ret = 1;
2432 }
2433 break;
2434 }
2435
2436 /* Cleanup */
2437 blk_unref(blk);
2438 if (ret) {
2439 return 1;
2440 }
2441 return 0;
2442 }
2443
2444 static int img_rebase(int argc, char **argv)
2445 {
2446 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
2447 BlockDriverState *bs = NULL;
2448 char *filename;
2449 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2450 int c, flags, src_flags, ret;
2451 int unsafe = 0;
2452 int progress = 0;
2453 bool quiet = false;
2454 Error *local_err = NULL;
2455
2456 /* Parse commandline parameters */
2457 fmt = NULL;
2458 cache = BDRV_DEFAULT_CACHE;
2459 src_cache = BDRV_DEFAULT_CACHE;
2460 out_baseimg = NULL;
2461 out_basefmt = NULL;
2462 for(;;) {
2463 c = getopt(argc, argv, "hf:F:b:upt:T:q");
2464 if (c == -1) {
2465 break;
2466 }
2467 switch(c) {
2468 case '?':
2469 case 'h':
2470 help();
2471 return 0;
2472 case 'f':
2473 fmt = optarg;
2474 break;
2475 case 'F':
2476 out_basefmt = optarg;
2477 break;
2478 case 'b':
2479 out_baseimg = optarg;
2480 break;
2481 case 'u':
2482 unsafe = 1;
2483 break;
2484 case 'p':
2485 progress = 1;
2486 break;
2487 case 't':
2488 cache = optarg;
2489 break;
2490 case 'T':
2491 src_cache = optarg;
2492 break;
2493 case 'q':
2494 quiet = true;
2495 break;
2496 }
2497 }
2498
2499 if (quiet) {
2500 progress = 0;
2501 }
2502
2503 if (optind != argc - 1) {
2504 error_exit("Expecting one image file name");
2505 }
2506 if (!unsafe && !out_baseimg) {
2507 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2508 }
2509 filename = argv[optind++];
2510
2511 qemu_progress_init(progress, 2.0);
2512 qemu_progress_print(0, 100);
2513
2514 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
2515 ret = bdrv_parse_cache_flags(cache, &flags);
2516 if (ret < 0) {
2517 error_report("Invalid cache option: %s", cache);
2518 goto out;
2519 }
2520
2521 src_flags = BDRV_O_FLAGS;
2522 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2523 if (ret < 0) {
2524 error_report("Invalid source cache option: %s", src_cache);
2525 goto out;
2526 }
2527
2528 /*
2529 * Open the images.
2530 *
2531 * Ignore the old backing file for unsafe rebase in case we want to correct
2532 * the reference to a renamed or moved backing file.
2533 */
2534 blk = img_open("image", filename, fmt, flags, true, quiet);
2535 if (!blk) {
2536 ret = -1;
2537 goto out;
2538 }
2539 bs = blk_bs(blk);
2540
2541 if (out_basefmt != NULL) {
2542 if (bdrv_find_format(out_basefmt) == NULL) {
2543 error_report("Invalid format name: '%s'", out_basefmt);
2544 ret = -1;
2545 goto out;
2546 }
2547 }
2548
2549 /* For safe rebasing we need to compare old and new backing file */
2550 if (!unsafe) {
2551 char backing_name[PATH_MAX];
2552 QDict *options = NULL;
2553
2554 if (bs->backing_format[0] != '\0') {
2555 options = qdict_new();
2556 qdict_put(options, "driver", qstring_from_str(bs->backing_format));
2557 }
2558
2559 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2560 blk_old_backing = blk_new_open("old_backing", backing_name, NULL,
2561 options, src_flags, &local_err);
2562 if (!blk_old_backing) {
2563 error_report("Could not open old backing file '%s': %s",
2564 backing_name, error_get_pretty(local_err));
2565 error_free(local_err);
2566 goto out;
2567 }
2568
2569 if (out_baseimg[0]) {
2570 if (out_basefmt) {
2571 options = qdict_new();
2572 qdict_put(options, "driver", qstring_from_str(out_basefmt));
2573 } else {
2574 options = NULL;
2575 }
2576
2577 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL,
2578 options, src_flags, &local_err);
2579 if (!blk_new_backing) {
2580 error_report("Could not open new backing file '%s': %s",
2581 out_baseimg, error_get_pretty(local_err));
2582 error_free(local_err);
2583 goto out;
2584 }
2585 }
2586 }
2587
2588 /*
2589 * Check each unallocated cluster in the COW file. If it is unallocated,
2590 * accesses go to the backing file. We must therefore compare this cluster
2591 * in the old and new backing file, and if they differ we need to copy it
2592 * from the old backing file into the COW file.
2593 *
2594 * If qemu-img crashes during this step, no harm is done. The content of
2595 * the image is the same as the original one at any time.
2596 */
2597 if (!unsafe) {
2598 int64_t num_sectors;
2599 int64_t old_backing_num_sectors;
2600 int64_t new_backing_num_sectors = 0;
2601 uint64_t sector;
2602 int n;
2603 uint8_t * buf_old;
2604 uint8_t * buf_new;
2605 float local_progress = 0;
2606
2607 buf_old = blk_blockalign(blk, IO_BUF_SIZE);
2608 buf_new = blk_blockalign(blk, IO_BUF_SIZE);
2609
2610 num_sectors = blk_nb_sectors(blk);
2611 if (num_sectors < 0) {
2612 error_report("Could not get size of '%s': %s",
2613 filename, strerror(-num_sectors));
2614 ret = -1;
2615 goto out;
2616 }
2617 old_backing_num_sectors = blk_nb_sectors(blk_old_backing);
2618 if (old_backing_num_sectors < 0) {
2619 char backing_name[PATH_MAX];
2620
2621 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2622 error_report("Could not get size of '%s': %s",
2623 backing_name, strerror(-old_backing_num_sectors));
2624 ret = -1;
2625 goto out;
2626 }
2627 if (blk_new_backing) {
2628 new_backing_num_sectors = blk_nb_sectors(blk_new_backing);
2629 if (new_backing_num_sectors < 0) {
2630 error_report("Could not get size of '%s': %s",
2631 out_baseimg, strerror(-new_backing_num_sectors));
2632 ret = -1;
2633 goto out;
2634 }
2635 }
2636
2637 if (num_sectors != 0) {
2638 local_progress = (float)100 /
2639 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2640 }
2641
2642 for (sector = 0; sector < num_sectors; sector += n) {
2643
2644 /* How many sectors can we handle with the next read? */
2645 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2646 n = (IO_BUF_SIZE / 512);
2647 } else {
2648 n = num_sectors - sector;
2649 }
2650
2651 /* If the cluster is allocated, we don't need to take action */
2652 ret = bdrv_is_allocated(bs, sector, n, &n);
2653 if (ret < 0) {
2654 error_report("error while reading image metadata: %s",
2655 strerror(-ret));
2656 goto out;
2657 }
2658 if (ret) {
2659 continue;
2660 }
2661
2662 /*
2663 * Read old and new backing file and take into consideration that
2664 * backing files may be smaller than the COW image.
2665 */
2666 if (sector >= old_backing_num_sectors) {
2667 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2668 } else {
2669 if (sector + n > old_backing_num_sectors) {
2670 n = old_backing_num_sectors - sector;
2671 }
2672
2673 ret = blk_read(blk_old_backing, sector, buf_old, n);
2674 if (ret < 0) {
2675 error_report("error while reading from old backing file");
2676 goto out;
2677 }
2678 }
2679
2680 if (sector >= new_backing_num_sectors || !blk_new_backing) {
2681 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2682 } else {
2683 if (sector + n > new_backing_num_sectors) {
2684 n = new_backing_num_sectors - sector;
2685 }
2686
2687 ret = blk_read(blk_new_backing, sector, buf_new, n);
2688 if (ret < 0) {
2689 error_report("error while reading from new backing file");
2690 goto out;
2691 }
2692 }
2693
2694 /* If they differ, we need to write to the COW file */
2695 uint64_t written = 0;
2696
2697 while (written < n) {
2698 int pnum;
2699
2700 if (compare_sectors(buf_old + written * 512,
2701 buf_new + written * 512, n - written, &pnum))
2702 {
2703 ret = blk_write(blk, sector + written,
2704 buf_old + written * 512, pnum);
2705 if (ret < 0) {
2706 error_report("Error while writing to COW image: %s",
2707 strerror(-ret));
2708 goto out;
2709 }
2710 }
2711
2712 written += pnum;
2713 }
2714 qemu_progress_print(local_progress, 100);
2715 }
2716
2717 qemu_vfree(buf_old);
2718 qemu_vfree(buf_new);
2719 }
2720
2721 /*
2722 * Change the backing file. All clusters that are different from the old
2723 * backing file are overwritten in the COW file now, so the visible content
2724 * doesn't change when we switch the backing file.
2725 */
2726 if (out_baseimg && *out_baseimg) {
2727 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2728 } else {
2729 ret = bdrv_change_backing_file(bs, NULL, NULL);
2730 }
2731
2732 if (ret == -ENOSPC) {
2733 error_report("Could not change the backing file to '%s': No "
2734 "space left in the file header", out_baseimg);
2735 } else if (ret < 0) {
2736 error_report("Could not change the backing file to '%s': %s",
2737 out_baseimg, strerror(-ret));
2738 }
2739
2740 qemu_progress_print(100, 0);
2741 /*
2742 * TODO At this point it is possible to check if any clusters that are
2743 * allocated in the COW file are the same in the backing file. If so, they
2744 * could be dropped from the COW file. Don't do this before switching the
2745 * backing file, in case of a crash this would lead to corruption.
2746 */
2747 out:
2748 qemu_progress_end();
2749 /* Cleanup */
2750 if (!unsafe) {
2751 blk_unref(blk_old_backing);
2752 blk_unref(blk_new_backing);
2753 }
2754
2755 blk_unref(blk);
2756 if (ret) {
2757 return 1;
2758 }
2759 return 0;
2760 }
2761
2762 static int img_resize(int argc, char **argv)
2763 {
2764 Error *err = NULL;
2765 int c, ret, relative;
2766 const char *filename, *fmt, *size;
2767 int64_t n, total_size;
2768 bool quiet = false;
2769 BlockBackend *blk = NULL;
2770 QemuOpts *param;
2771 static QemuOptsList resize_options = {
2772 .name = "resize_options",
2773 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2774 .desc = {
2775 {
2776 .name = BLOCK_OPT_SIZE,
2777 .type = QEMU_OPT_SIZE,
2778 .help = "Virtual disk size"
2779 }, {
2780 /* end of list */
2781 }
2782 },
2783 };
2784
2785 /* Remove size from argv manually so that negative numbers are not treated
2786 * as options by getopt. */
2787 if (argc < 3) {
2788 error_exit("Not enough arguments");
2789 return 1;
2790 }
2791
2792 size = argv[--argc];
2793
2794 /* Parse getopt arguments */
2795 fmt = NULL;
2796 for(;;) {
2797 c = getopt(argc, argv, "f:hq");
2798 if (c == -1) {
2799 break;
2800 }
2801 switch(c) {
2802 case '?':
2803 case 'h':
2804 help();
2805 break;
2806 case 'f':
2807 fmt = optarg;
2808 break;
2809 case 'q':
2810 quiet = true;
2811 break;
2812 }
2813 }
2814 if (optind != argc - 1) {
2815 error_exit("Expecting one image file name");
2816 }
2817 filename = argv[optind++];
2818
2819 /* Choose grow, shrink, or absolute resize mode */
2820 switch (size[0]) {
2821 case '+':
2822 relative = 1;
2823 size++;
2824 break;
2825 case '-':
2826 relative = -1;
2827 size++;
2828 break;
2829 default:
2830 relative = 0;
2831 break;
2832 }
2833
2834 /* Parse size */
2835 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
2836 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err);
2837 if (err) {
2838 error_report_err(err);
2839 ret = -1;
2840 qemu_opts_del(param);
2841 goto out;
2842 }
2843 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2844 qemu_opts_del(param);
2845
2846 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2847 true, quiet);
2848 if (!blk) {
2849 ret = -1;
2850 goto out;
2851 }
2852
2853 if (relative) {
2854 total_size = blk_getlength(blk) + n * relative;
2855 } else {
2856 total_size = n;
2857 }
2858 if (total_size <= 0) {
2859 error_report("New image size must be positive");
2860 ret = -1;
2861 goto out;
2862 }
2863
2864 ret = blk_truncate(blk, total_size);
2865 switch (ret) {
2866 case 0:
2867 qprintf(quiet, "Image resized.\n");
2868 break;
2869 case -ENOTSUP:
2870 error_report("This image does not support resize");
2871 break;
2872 case -EACCES:
2873 error_report("Image is read-only");
2874 break;
2875 default:
2876 error_report("Error resizing image (%d)", -ret);
2877 break;
2878 }
2879 out:
2880 blk_unref(blk);
2881 if (ret) {
2882 return 1;
2883 }
2884 return 0;
2885 }
2886
2887 static void amend_status_cb(BlockDriverState *bs,
2888 int64_t offset, int64_t total_work_size)
2889 {
2890 qemu_progress_print(100.f * offset / total_work_size, 0);
2891 }
2892
2893 static int img_amend(int argc, char **argv)
2894 {
2895 Error *err = NULL;
2896 int c, ret = 0;
2897 char *options = NULL;
2898 QemuOptsList *create_opts = NULL;
2899 QemuOpts *opts = NULL;
2900 const char *fmt = NULL, *filename, *cache;
2901 int flags;
2902 bool quiet = false, progress = false;
2903 BlockBackend *blk = NULL;
2904 BlockDriverState *bs = NULL;
2905
2906 cache = BDRV_DEFAULT_CACHE;
2907 for (;;) {
2908 c = getopt(argc, argv, "ho:f:t:pq");
2909 if (c == -1) {
2910 break;
2911 }
2912
2913 switch (c) {
2914 case 'h':
2915 case '?':
2916 help();
2917 break;
2918 case 'o':
2919 if (!is_valid_option_list(optarg)) {
2920 error_report("Invalid option list: %s", optarg);
2921 ret = -1;
2922 goto out;
2923 }
2924 if (!options) {
2925 options = g_strdup(optarg);
2926 } else {
2927 char *old_options = options;
2928 options = g_strdup_printf("%s,%s", options, optarg);
2929 g_free(old_options);
2930 }
2931 break;
2932 case 'f':
2933 fmt = optarg;
2934 break;
2935 case 't':
2936 cache = optarg;
2937 break;
2938 case 'p':
2939 progress = true;
2940 break;
2941 case 'q':
2942 quiet = true;
2943 break;
2944 }
2945 }
2946
2947 if (!options) {
2948 error_exit("Must specify options (-o)");
2949 }
2950
2951 if (quiet) {
2952 progress = false;
2953 }
2954 qemu_progress_init(progress, 1.0);
2955
2956 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2957 if (fmt && has_help_option(options)) {
2958 /* If a format is explicitly specified (and possibly no filename is
2959 * given), print option help here */
2960 ret = print_block_option_help(filename, fmt);
2961 goto out;
2962 }
2963
2964 if (optind != argc - 1) {
2965 error_report("Expecting one image file name");
2966 ret = -1;
2967 goto out;
2968 }
2969
2970 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2971 ret = bdrv_parse_cache_flags(cache, &flags);
2972 if (ret < 0) {
2973 error_report("Invalid cache option: %s", cache);
2974 goto out;
2975 }
2976
2977 blk = img_open("image", filename, fmt, flags, true, quiet);
2978 if (!blk) {
2979 ret = -1;
2980 goto out;
2981 }
2982 bs = blk_bs(blk);
2983
2984 fmt = bs->drv->format_name;
2985
2986 if (has_help_option(options)) {
2987 /* If the format was auto-detected, print option help here */
2988 ret = print_block_option_help(filename, fmt);
2989 goto out;
2990 }
2991
2992 if (!bs->drv->create_opts) {
2993 error_report("Format driver '%s' does not support any options to amend",
2994 fmt);
2995 ret = -1;
2996 goto out;
2997 }
2998
2999 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
3000 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
3001 if (options) {
3002 qemu_opts_do_parse(opts, options, NULL, &err);
3003 if (err) {
3004 error_report("Invalid options for file format '%s'", fmt);
3005 error_free(err);
3006 ret = -1;
3007 goto out;
3008 }
3009 }
3010
3011 /* In case the driver does not call amend_status_cb() */
3012 qemu_progress_print(0.f, 0);
3013 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
3014 qemu_progress_print(100.f, 0);
3015 if (ret < 0) {
3016 error_report("Error while amending options: %s", strerror(-ret));
3017 goto out;
3018 }
3019
3020 out:
3021 qemu_progress_end();
3022
3023 blk_unref(blk);
3024 qemu_opts_del(opts);
3025 qemu_opts_free(create_opts);
3026 g_free(options);
3027
3028 if (ret) {
3029 return 1;
3030 }
3031 return 0;
3032 }
3033
3034 static const img_cmd_t img_cmds[] = {
3035 #define DEF(option, callback, arg_string) \
3036 { option, callback },
3037 #include "qemu-img-cmds.h"
3038 #undef DEF
3039 #undef GEN_DOCS
3040 { NULL, NULL, },
3041 };
3042
3043 int main(int argc, char **argv)
3044 {
3045 const img_cmd_t *cmd;
3046 const char *cmdname;
3047 Error *local_error = NULL;
3048 int c;
3049 static const struct option long_options[] = {
3050 {"help", no_argument, 0, 'h'},
3051 {"version", no_argument, 0, 'v'},
3052 {0, 0, 0, 0}
3053 };
3054
3055 #ifdef CONFIG_POSIX
3056 signal(SIGPIPE, SIG_IGN);
3057 #endif
3058
3059 error_set_progname(argv[0]);
3060 qemu_init_exec_dir(argv[0]);
3061
3062 if (qemu_init_main_loop(&local_error)) {
3063 error_report_err(local_error);
3064 exit(EXIT_FAILURE);
3065 }
3066
3067 bdrv_init();
3068 if (argc < 2) {
3069 error_exit("Not enough arguments");
3070 }
3071 cmdname = argv[1];
3072
3073 /* find the command */
3074 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
3075 if (!strcmp(cmdname, cmd->name)) {
3076 return cmd->handler(argc - 1, argv + 1);
3077 }
3078 }
3079
3080 c = getopt_long(argc, argv, "h", long_options, NULL);
3081
3082 if (c == 'h') {
3083 help();
3084 }
3085 if (c == 'v') {
3086 printf(QEMU_IMG_VERSION);
3087 return 0;
3088 }
3089
3090 /* not found */
3091 error_exit("Command not found: %s", cmdname);
3092 }
QEMU Monitor Protocol