ahci: Fix FIS decomposition
[qemu.git] / qemu-img.c
1 /*
2 * QEMU disk image utility
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qapi-visit.h"
25 #include "qapi/qmp-output-visitor.h"
26 #include "qapi/qmp/qjson.h"
27 #include "qemu-common.h"
28 #include "qemu/option.h"
29 #include "qemu/error-report.h"
30 #include "qemu/osdep.h"
31 #include "sysemu/sysemu.h"
32 #include "sysemu/block-backend.h"
33 #include "block/block_int.h"
34 #include "block/blockjob.h"
35 #include "block/qapi.h"
36 #include <getopt.h>
37
38 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION \
39 ", Copyright (c) 2004-2008 Fabrice Bellard\n"
40
41 typedef struct img_cmd_t {
42 const char *name;
43 int (*handler)(int argc, char **argv);
44 } img_cmd_t;
45
46 enum {
47 OPTION_OUTPUT = 256,
48 OPTION_BACKING_CHAIN = 257,
49 };
50
51 typedef enum OutputFormat {
52 OFORMAT_JSON,
53 OFORMAT_HUMAN,
54 } OutputFormat;
55
56 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */
57 #define BDRV_O_FLAGS BDRV_O_CACHE_WB
58 #define BDRV_DEFAULT_CACHE "writeback"
59
60 static void format_print(void *opaque, const char *name)
61 {
62 printf(" %s", name);
63 }
64
65 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
66 {
67 va_list ap;
68
69 error_printf("qemu-img: ");
70
71 va_start(ap, fmt);
72 error_vprintf(fmt, ap);
73 va_end(ap);
74
75 error_printf("\nTry 'qemu-img --help' for more information\n");
76 exit(EXIT_FAILURE);
77 }
78
79 /* Please keep in synch with qemu-img.texi */
80 static void QEMU_NORETURN help(void)
81 {
82 const char *help_msg =
83 QEMU_IMG_VERSION
84 "usage: qemu-img command [command options]\n"
85 "QEMU disk image utility\n"
86 "\n"
87 "Command syntax:\n"
88 #define DEF(option, callback, arg_string) \
89 " " arg_string "\n"
90 #include "qemu-img-cmds.h"
91 #undef DEF
92 #undef GEN_DOCS
93 "\n"
94 "Command parameters:\n"
95 " 'filename' is a disk image filename\n"
96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n"
97 " 'cache' is the cache mode used to write the output disk image, the valid\n"
98 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
99 " 'directsync' and 'unsafe' (default for convert)\n"
100 " 'src_cache' is the cache mode used to read input disk images, the valid\n"
101 " options are the same as for the 'cache' option\n"
102 " 'size' is the disk image size in bytes. Optional suffixes\n"
103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
105 " supported. 'b' is ignored.\n"
106 " 'output_filename' is the destination disk image filename\n"
107 " 'output_fmt' is the destination format\n"
108 " 'options' is a comma separated list of format specific options in a\n"
109 " name=value format. Use -o ? for an overview of the options supported by the\n"
110 " used format\n"
111 " 'snapshot_param' is param used for internal snapshot, format\n"
112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
113 " '[ID_OR_NAME]'\n"
114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n"
115 " instead\n"
116 " '-c' indicates that target image must be compressed (qcow format only)\n"
117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
118 " match exactly. The image doesn't need a working backing file before\n"
119 " rebasing in this case (useful for renaming the backing file)\n"
120 " '-h' with or without a command shows this help and lists the supported formats\n"
121 " '-p' show progress of command (only certain commands)\n"
122 " '-q' use Quiet mode - do not print any output (except errors)\n"
123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
124 " contain only zeros for qemu-img to create a sparse image during\n"
125 " conversion. If the number of bytes is 0, the source will not be scanned for\n"
126 " unallocated or zero sectors, and the destination image will always be\n"
127 " fully allocated\n"
128 " '--output' takes the format in which the output must be done (human or json)\n"
129 " '-n' skips the target volume creation (useful if the volume is created\n"
130 " prior to running qemu-img)\n"
131 "\n"
132 "Parameters to check subcommand:\n"
133 " '-r' tries to repair any inconsistencies that are found during the check.\n"
134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
135 " kinds of errors, with a higher risk of choosing the wrong fix or\n"
136 " hiding corruption that has already occurred.\n"
137 "\n"
138 "Parameters to snapshot subcommand:\n"
139 " 'snapshot' is the name of the snapshot to create, apply or delete\n"
140 " '-a' applies a snapshot (revert disk to saved state)\n"
141 " '-c' creates a snapshot\n"
142 " '-d' deletes a snapshot\n"
143 " '-l' lists all snapshots in the given image\n"
144 "\n"
145 "Parameters to compare subcommand:\n"
146 " '-f' first image format\n"
147 " '-F' second image format\n"
148 " '-s' run in Strict mode - fail on different image size or sector allocation\n";
149
150 printf("%s\nSupported formats:", help_msg);
151 bdrv_iterate_format(format_print, NULL);
152 printf("\n");
153 exit(EXIT_SUCCESS);
154 }
155
156 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
157 {
158 int ret = 0;
159 if (!quiet) {
160 va_list args;
161 va_start(args, fmt);
162 ret = vprintf(fmt, args);
163 va_end(args);
164 }
165 return ret;
166 }
167
168 #if defined(WIN32)
169 /* XXX: put correct support for win32 */
170 static int read_password(char *buf, int buf_size)
171 {
172 int c, i;
173
174 printf("Password: ");
175 fflush(stdout);
176 i = 0;
177 for(;;) {
178 c = getchar();
179 if (c < 0) {
180 buf[i] = '\0';
181 return -1;
182 } else if (c == '\n') {
183 break;
184 } else if (i < (buf_size - 1)) {
185 buf[i++] = c;
186 }
187 }
188 buf[i] = '\0';
189 return 0;
190 }
191
192 #else
193
194 #include <termios.h>
195
196 static struct termios oldtty;
197
198 static void term_exit(void)
199 {
200 tcsetattr (0, TCSANOW, &oldtty);
201 }
202
203 static void term_init(void)
204 {
205 struct termios tty;
206
207 tcgetattr (0, &tty);
208 oldtty = tty;
209
210 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
211 |INLCR|IGNCR|ICRNL|IXON);
212 tty.c_oflag |= OPOST;
213 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
214 tty.c_cflag &= ~(CSIZE|PARENB);
215 tty.c_cflag |= CS8;
216 tty.c_cc[VMIN] = 1;
217 tty.c_cc[VTIME] = 0;
218
219 tcsetattr (0, TCSANOW, &tty);
220
221 atexit(term_exit);
222 }
223
224 static int read_password(char *buf, int buf_size)
225 {
226 uint8_t ch;
227 int i, ret;
228
229 printf("password: ");
230 fflush(stdout);
231 term_init();
232 i = 0;
233 for(;;) {
234 ret = read(0, &ch, 1);
235 if (ret == -1) {
236 if (errno == EAGAIN || errno == EINTR) {
237 continue;
238 } else {
239 break;
240 }
241 } else if (ret == 0) {
242 ret = -1;
243 break;
244 } else {
245 if (ch == '\r') {
246 ret = 0;
247 break;
248 }
249 if (i < (buf_size - 1))
250 buf[i++] = ch;
251 }
252 }
253 term_exit();
254 buf[i] = '\0';
255 printf("\n");
256 return ret;
257 }
258 #endif
259
260 static int print_block_option_help(const char *filename, const char *fmt)
261 {
262 BlockDriver *drv, *proto_drv;
263 QemuOptsList *create_opts = NULL;
264
265 /* Find driver and parse its options */
266 drv = bdrv_find_format(fmt);
267 if (!drv) {
268 error_report("Unknown file format '%s'", fmt);
269 return 1;
270 }
271
272 create_opts = qemu_opts_append(create_opts, drv->create_opts);
273 if (filename) {
274 proto_drv = bdrv_find_protocol(filename, true);
275 if (!proto_drv) {
276 error_report("Unknown protocol '%s'", filename);
277 qemu_opts_free(create_opts);
278 return 1;
279 }
280 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
281 }
282
283 qemu_opts_print_help(create_opts);
284 qemu_opts_free(create_opts);
285 return 0;
286 }
287
288 static BlockBackend *img_open(const char *id, const char *filename,
289 const char *fmt, int flags,
290 bool require_io, bool quiet)
291 {
292 BlockBackend *blk;
293 BlockDriverState *bs;
294 BlockDriver *drv;
295 char password[256];
296 Error *local_err = NULL;
297 int ret;
298
299 blk = blk_new_with_bs(id, &error_abort);
300 bs = blk_bs(blk);
301
302 if (fmt) {
303 drv = bdrv_find_format(fmt);
304 if (!drv) {
305 error_report("Unknown file format '%s'", fmt);
306 goto fail;
307 }
308 } else {
309 drv = NULL;
310 }
311
312 ret = bdrv_open(&bs, filename, NULL, NULL, flags, drv, &local_err);
313 if (ret < 0) {
314 error_report("Could not open '%s': %s", filename,
315 error_get_pretty(local_err));
316 error_free(local_err);
317 goto fail;
318 }
319
320 if (bdrv_is_encrypted(bs) && require_io) {
321 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
322 if (read_password(password, sizeof(password)) < 0) {
323 error_report("No password given");
324 goto fail;
325 }
326 if (bdrv_set_key(bs, password) < 0) {
327 error_report("invalid password");
328 goto fail;
329 }
330 }
331 return blk;
332 fail:
333 blk_unref(blk);
334 return NULL;
335 }
336
337 static int add_old_style_options(const char *fmt, QemuOpts *opts,
338 const char *base_filename,
339 const char *base_fmt)
340 {
341 if (base_filename) {
342 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) {
343 error_report("Backing file not supported for file format '%s'",
344 fmt);
345 return -1;
346 }
347 }
348 if (base_fmt) {
349 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) {
350 error_report("Backing file format not supported for file "
351 "format '%s'", fmt);
352 return -1;
353 }
354 }
355 return 0;
356 }
357
358 static int img_create(int argc, char **argv)
359 {
360 int c;
361 uint64_t img_size = -1;
362 const char *fmt = "raw";
363 const char *base_fmt = NULL;
364 const char *filename;
365 const char *base_filename = NULL;
366 char *options = NULL;
367 Error *local_err = NULL;
368 bool quiet = false;
369
370 for(;;) {
371 c = getopt(argc, argv, "F:b:f:he6o:q");
372 if (c == -1) {
373 break;
374 }
375 switch(c) {
376 case '?':
377 case 'h':
378 help();
379 break;
380 case 'F':
381 base_fmt = optarg;
382 break;
383 case 'b':
384 base_filename = optarg;
385 break;
386 case 'f':
387 fmt = optarg;
388 break;
389 case 'e':
390 error_report("option -e is deprecated, please use \'-o "
391 "encryption\' instead!");
392 goto fail;
393 case '6':
394 error_report("option -6 is deprecated, please use \'-o "
395 "compat6\' instead!");
396 goto fail;
397 case 'o':
398 if (!is_valid_option_list(optarg)) {
399 error_report("Invalid option list: %s", optarg);
400 goto fail;
401 }
402 if (!options) {
403 options = g_strdup(optarg);
404 } else {
405 char *old_options = options;
406 options = g_strdup_printf("%s,%s", options, optarg);
407 g_free(old_options);
408 }
409 break;
410 case 'q':
411 quiet = true;
412 break;
413 }
414 }
415
416 /* Get the filename */
417 filename = (optind < argc) ? argv[optind] : NULL;
418 if (options && has_help_option(options)) {
419 g_free(options);
420 return print_block_option_help(filename, fmt);
421 }
422
423 if (optind >= argc) {
424 error_exit("Expecting image file name");
425 }
426 optind++;
427
428 /* Get image size, if specified */
429 if (optind < argc) {
430 int64_t sval;
431 char *end;
432 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
433 if (sval < 0 || *end) {
434 if (sval == -ERANGE) {
435 error_report("Image size must be less than 8 EiB!");
436 } else {
437 error_report("Invalid image size specified! You may use k, M, "
438 "G, T, P or E suffixes for ");
439 error_report("kilobytes, megabytes, gigabytes, terabytes, "
440 "petabytes and exabytes.");
441 }
442 goto fail;
443 }
444 img_size = (uint64_t)sval;
445 }
446 if (optind != argc) {
447 error_exit("Unexpected argument: %s", argv[optind]);
448 }
449
450 bdrv_img_create(filename, fmt, base_filename, base_fmt,
451 options, img_size, BDRV_O_FLAGS, &local_err, quiet);
452 if (local_err) {
453 error_report("%s: %s", filename, error_get_pretty(local_err));
454 error_free(local_err);
455 goto fail;
456 }
457
458 g_free(options);
459 return 0;
460
461 fail:
462 g_free(options);
463 return 1;
464 }
465
466 static void dump_json_image_check(ImageCheck *check, bool quiet)
467 {
468 Error *local_err = NULL;
469 QString *str;
470 QmpOutputVisitor *ov = qmp_output_visitor_new();
471 QObject *obj;
472 visit_type_ImageCheck(qmp_output_get_visitor(ov),
473 &check, NULL, &local_err);
474 obj = qmp_output_get_qobject(ov);
475 str = qobject_to_json_pretty(obj);
476 assert(str != NULL);
477 qprintf(quiet, "%s\n", qstring_get_str(str));
478 qobject_decref(obj);
479 qmp_output_visitor_cleanup(ov);
480 QDECREF(str);
481 }
482
483 static void dump_human_image_check(ImageCheck *check, bool quiet)
484 {
485 if (!(check->corruptions || check->leaks || check->check_errors)) {
486 qprintf(quiet, "No errors were found on the image.\n");
487 } else {
488 if (check->corruptions) {
489 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n"
490 "Data may be corrupted, or further writes to the image "
491 "may corrupt it.\n",
492 check->corruptions);
493 }
494
495 if (check->leaks) {
496 qprintf(quiet,
497 "\n%" PRId64 " leaked clusters were found on the image.\n"
498 "This means waste of disk space, but no harm to data.\n",
499 check->leaks);
500 }
501
502 if (check->check_errors) {
503 qprintf(quiet,
504 "\n%" PRId64
505 " internal errors have occurred during the check.\n",
506 check->check_errors);
507 }
508 }
509
510 if (check->total_clusters != 0 && check->allocated_clusters != 0) {
511 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, "
512 "%0.2f%% fragmented, %0.2f%% compressed clusters\n",
513 check->allocated_clusters, check->total_clusters,
514 check->allocated_clusters * 100.0 / check->total_clusters,
515 check->fragmented_clusters * 100.0 / check->allocated_clusters,
516 check->compressed_clusters * 100.0 /
517 check->allocated_clusters);
518 }
519
520 if (check->image_end_offset) {
521 qprintf(quiet,
522 "Image end offset: %" PRId64 "\n", check->image_end_offset);
523 }
524 }
525
526 static int collect_image_check(BlockDriverState *bs,
527 ImageCheck *check,
528 const char *filename,
529 const char *fmt,
530 int fix)
531 {
532 int ret;
533 BdrvCheckResult result;
534
535 ret = bdrv_check(bs, &result, fix);
536 if (ret < 0) {
537 return ret;
538 }
539
540 check->filename = g_strdup(filename);
541 check->format = g_strdup(bdrv_get_format_name(bs));
542 check->check_errors = result.check_errors;
543 check->corruptions = result.corruptions;
544 check->has_corruptions = result.corruptions != 0;
545 check->leaks = result.leaks;
546 check->has_leaks = result.leaks != 0;
547 check->corruptions_fixed = result.corruptions_fixed;
548 check->has_corruptions_fixed = result.corruptions != 0;
549 check->leaks_fixed = result.leaks_fixed;
550 check->has_leaks_fixed = result.leaks != 0;
551 check->image_end_offset = result.image_end_offset;
552 check->has_image_end_offset = result.image_end_offset != 0;
553 check->total_clusters = result.bfi.total_clusters;
554 check->has_total_clusters = result.bfi.total_clusters != 0;
555 check->allocated_clusters = result.bfi.allocated_clusters;
556 check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
557 check->fragmented_clusters = result.bfi.fragmented_clusters;
558 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
559 check->compressed_clusters = result.bfi.compressed_clusters;
560 check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
561
562 return 0;
563 }
564
565 /*
566 * Checks an image for consistency. Exit codes:
567 *
568 * 0 - Check completed, image is good
569 * 1 - Check not completed because of internal errors
570 * 2 - Check completed, image is corrupted
571 * 3 - Check completed, image has leaked clusters, but is good otherwise
572 * 63 - Checks are not supported by the image format
573 */
574 static int img_check(int argc, char **argv)
575 {
576 int c, ret;
577 OutputFormat output_format = OFORMAT_HUMAN;
578 const char *filename, *fmt, *output, *cache;
579 BlockBackend *blk;
580 BlockDriverState *bs;
581 int fix = 0;
582 int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
583 ImageCheck *check;
584 bool quiet = false;
585
586 fmt = NULL;
587 output = NULL;
588 cache = BDRV_DEFAULT_CACHE;
589 for(;;) {
590 int option_index = 0;
591 static const struct option long_options[] = {
592 {"help", no_argument, 0, 'h'},
593 {"format", required_argument, 0, 'f'},
594 {"repair", required_argument, 0, 'r'},
595 {"output", required_argument, 0, OPTION_OUTPUT},
596 {0, 0, 0, 0}
597 };
598 c = getopt_long(argc, argv, "hf:r:T:q",
599 long_options, &option_index);
600 if (c == -1) {
601 break;
602 }
603 switch(c) {
604 case '?':
605 case 'h':
606 help();
607 break;
608 case 'f':
609 fmt = optarg;
610 break;
611 case 'r':
612 flags |= BDRV_O_RDWR;
613
614 if (!strcmp(optarg, "leaks")) {
615 fix = BDRV_FIX_LEAKS;
616 } else if (!strcmp(optarg, "all")) {
617 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
618 } else {
619 error_exit("Unknown option value for -r "
620 "(expecting 'leaks' or 'all'): %s", optarg);
621 }
622 break;
623 case OPTION_OUTPUT:
624 output = optarg;
625 break;
626 case 'T':
627 cache = optarg;
628 break;
629 case 'q':
630 quiet = true;
631 break;
632 }
633 }
634 if (optind != argc - 1) {
635 error_exit("Expecting one image file name");
636 }
637 filename = argv[optind++];
638
639 if (output && !strcmp(output, "json")) {
640 output_format = OFORMAT_JSON;
641 } else if (output && !strcmp(output, "human")) {
642 output_format = OFORMAT_HUMAN;
643 } else if (output) {
644 error_report("--output must be used with human or json as argument.");
645 return 1;
646 }
647
648 ret = bdrv_parse_cache_flags(cache, &flags);
649 if (ret < 0) {
650 error_report("Invalid source cache option: %s", cache);
651 return 1;
652 }
653
654 blk = img_open("image", filename, fmt, flags, true, quiet);
655 if (!blk) {
656 return 1;
657 }
658 bs = blk_bs(blk);
659
660 check = g_new0(ImageCheck, 1);
661 ret = collect_image_check(bs, check, filename, fmt, fix);
662
663 if (ret == -ENOTSUP) {
664 error_report("This image format does not support checks");
665 ret = 63;
666 goto fail;
667 }
668
669 if (check->corruptions_fixed || check->leaks_fixed) {
670 int corruptions_fixed, leaks_fixed;
671
672 leaks_fixed = check->leaks_fixed;
673 corruptions_fixed = check->corruptions_fixed;
674
675 if (output_format == OFORMAT_HUMAN) {
676 qprintf(quiet,
677 "The following inconsistencies were found and repaired:\n\n"
678 " %" PRId64 " leaked clusters\n"
679 " %" PRId64 " corruptions\n\n"
680 "Double checking the fixed image now...\n",
681 check->leaks_fixed,
682 check->corruptions_fixed);
683 }
684
685 ret = collect_image_check(bs, check, filename, fmt, 0);
686
687 check->leaks_fixed = leaks_fixed;
688 check->corruptions_fixed = corruptions_fixed;
689 }
690
691 if (!ret) {
692 switch (output_format) {
693 case OFORMAT_HUMAN:
694 dump_human_image_check(check, quiet);
695 break;
696 case OFORMAT_JSON:
697 dump_json_image_check(check, quiet);
698 break;
699 }
700 }
701
702 if (ret || check->check_errors) {
703 if (ret) {
704 error_report("Check failed: %s", strerror(-ret));
705 } else {
706 error_report("Check failed");
707 }
708 ret = 1;
709 goto fail;
710 }
711
712 if (check->corruptions) {
713 ret = 2;
714 } else if (check->leaks) {
715 ret = 3;
716 } else {
717 ret = 0;
718 }
719
720 fail:
721 qapi_free_ImageCheck(check);
722 blk_unref(blk);
723 return ret;
724 }
725
726 typedef struct CommonBlockJobCBInfo {
727 BlockDriverState *bs;
728 Error **errp;
729 } CommonBlockJobCBInfo;
730
731 static void common_block_job_cb(void *opaque, int ret)
732 {
733 CommonBlockJobCBInfo *cbi = opaque;
734
735 if (ret < 0) {
736 error_setg_errno(cbi->errp, -ret, "Block job failed");
737 }
738
739 /* Drop this block job's reference */
740 bdrv_unref(cbi->bs);
741 }
742
743 static void run_block_job(BlockJob *job, Error **errp)
744 {
745 AioContext *aio_context = bdrv_get_aio_context(job->bs);
746
747 do {
748 aio_poll(aio_context, true);
749 qemu_progress_print((float)job->offset / job->len * 100.f, 0);
750 } while (!job->ready);
751
752 block_job_complete_sync(job, errp);
753
754 /* A block job may finish instantaneously without publishing any progress,
755 * so just signal completion here */
756 qemu_progress_print(100.f, 0);
757 }
758
759 static int img_commit(int argc, char **argv)
760 {
761 int c, ret, flags;
762 const char *filename, *fmt, *cache, *base;
763 BlockBackend *blk;
764 BlockDriverState *bs, *base_bs;
765 bool progress = false, quiet = false, drop = false;
766 Error *local_err = NULL;
767 CommonBlockJobCBInfo cbi;
768
769 fmt = NULL;
770 cache = BDRV_DEFAULT_CACHE;
771 base = NULL;
772 for(;;) {
773 c = getopt(argc, argv, "f:ht:b:dpq");
774 if (c == -1) {
775 break;
776 }
777 switch(c) {
778 case '?':
779 case 'h':
780 help();
781 break;
782 case 'f':
783 fmt = optarg;
784 break;
785 case 't':
786 cache = optarg;
787 break;
788 case 'b':
789 base = optarg;
790 /* -b implies -d */
791 drop = true;
792 break;
793 case 'd':
794 drop = true;
795 break;
796 case 'p':
797 progress = true;
798 break;
799 case 'q':
800 quiet = true;
801 break;
802 }
803 }
804
805 /* Progress is not shown in Quiet mode */
806 if (quiet) {
807 progress = false;
808 }
809
810 if (optind != argc - 1) {
811 error_exit("Expecting one image file name");
812 }
813 filename = argv[optind++];
814
815 flags = BDRV_O_RDWR | BDRV_O_UNMAP;
816 ret = bdrv_parse_cache_flags(cache, &flags);
817 if (ret < 0) {
818 error_report("Invalid cache option: %s", cache);
819 return 1;
820 }
821
822 blk = img_open("image", filename, fmt, flags, true, quiet);
823 if (!blk) {
824 return 1;
825 }
826 bs = blk_bs(blk);
827
828 qemu_progress_init(progress, 1.f);
829 qemu_progress_print(0.f, 100);
830
831 if (base) {
832 base_bs = bdrv_find_backing_image(bs, base);
833 if (!base_bs) {
834 error_set(&local_err, QERR_BASE_NOT_FOUND, base);
835 goto done;
836 }
837 } else {
838 /* This is different from QMP, which by default uses the deepest file in
839 * the backing chain (i.e., the very base); however, the traditional
840 * behavior of qemu-img commit is using the immediate backing file. */
841 base_bs = bs->backing_hd;
842 if (!base_bs) {
843 error_setg(&local_err, "Image does not have a backing file");
844 goto done;
845 }
846 }
847
848 cbi = (CommonBlockJobCBInfo){
849 .errp = &local_err,
850 .bs = bs,
851 };
852
853 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT,
854 common_block_job_cb, &cbi, &local_err);
855 if (local_err) {
856 goto done;
857 }
858
859 /* The block job will swap base_bs and bs (which is not what we really want
860 * here, but okay) and unref base_bs (after the swap, i.e., the old top
861 * image). In order to still be able to empty that top image afterwards,
862 * increment the reference counter here preemptively. */
863 if (!drop) {
864 bdrv_ref(base_bs);
865 }
866
867 run_block_job(bs->job, &local_err);
868 if (local_err) {
869 goto unref_backing;
870 }
871
872 if (!drop && base_bs->drv->bdrv_make_empty) {
873 ret = base_bs->drv->bdrv_make_empty(base_bs);
874 if (ret) {
875 error_setg_errno(&local_err, -ret, "Could not empty %s",
876 filename);
877 goto unref_backing;
878 }
879 }
880
881 unref_backing:
882 if (!drop) {
883 bdrv_unref(base_bs);
884 }
885
886 done:
887 qemu_progress_end();
888
889 blk_unref(blk);
890
891 if (local_err) {
892 qerror_report_err(local_err);
893 error_free(local_err);
894 return 1;
895 }
896
897 qprintf(quiet, "Image committed.\n");
898 return 0;
899 }
900
901 /*
902 * Returns true iff the first sector pointed to by 'buf' contains at least
903 * a non-NUL byte.
904 *
905 * 'pnum' is set to the number of sectors (including and immediately following
906 * the first one) that are known to be in the same allocated/unallocated state.
907 */
908 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
909 {
910 bool is_zero;
911 int i;
912
913 if (n <= 0) {
914 *pnum = 0;
915 return 0;
916 }
917 is_zero = buffer_is_zero(buf, 512);
918 for(i = 1; i < n; i++) {
919 buf += 512;
920 if (is_zero != buffer_is_zero(buf, 512)) {
921 break;
922 }
923 }
924 *pnum = i;
925 return !is_zero;
926 }
927
928 /*
929 * Like is_allocated_sectors, but if the buffer starts with a used sector,
930 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
931 * breaking up write requests for only small sparse areas.
932 */
933 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
934 int min)
935 {
936 int ret;
937 int num_checked, num_used;
938
939 if (n < min) {
940 min = n;
941 }
942
943 ret = is_allocated_sectors(buf, n, pnum);
944 if (!ret) {
945 return ret;
946 }
947
948 num_used = *pnum;
949 buf += BDRV_SECTOR_SIZE * *pnum;
950 n -= *pnum;
951 num_checked = num_used;
952
953 while (n > 0) {
954 ret = is_allocated_sectors(buf, n, pnum);
955
956 buf += BDRV_SECTOR_SIZE * *pnum;
957 n -= *pnum;
958 num_checked += *pnum;
959 if (ret) {
960 num_used = num_checked;
961 } else if (*pnum >= min) {
962 break;
963 }
964 }
965
966 *pnum = num_used;
967 return 1;
968 }
969
970 /*
971 * Compares two buffers sector by sector. Returns 0 if the first sector of both
972 * buffers matches, non-zero otherwise.
973 *
974 * pnum is set to the number of sectors (including and immediately following
975 * the first one) that are known to have the same comparison result
976 */
977 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
978 int *pnum)
979 {
980 int res, i;
981
982 if (n <= 0) {
983 *pnum = 0;
984 return 0;
985 }
986
987 res = !!memcmp(buf1, buf2, 512);
988 for(i = 1; i < n; i++) {
989 buf1 += 512;
990 buf2 += 512;
991
992 if (!!memcmp(buf1, buf2, 512) != res) {
993 break;
994 }
995 }
996
997 *pnum = i;
998 return res;
999 }
1000
1001 #define IO_BUF_SIZE (2 * 1024 * 1024)
1002
1003 static int64_t sectors_to_bytes(int64_t sectors)
1004 {
1005 return sectors << BDRV_SECTOR_BITS;
1006 }
1007
1008 static int64_t sectors_to_process(int64_t total, int64_t from)
1009 {
1010 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
1011 }
1012
1013 /*
1014 * Check if passed sectors are empty (not allocated or contain only 0 bytes)
1015 *
1016 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
1017 * data and negative value on error.
1018 *
1019 * @param bs: Driver used for accessing file
1020 * @param sect_num: Number of first sector to check
1021 * @param sect_count: Number of sectors to check
1022 * @param filename: Name of disk file we are checking (logging purpose)
1023 * @param buffer: Allocated buffer for storing read data
1024 * @param quiet: Flag for quiet mode
1025 */
1026 static int check_empty_sectors(BlockDriverState *bs, int64_t sect_num,
1027 int sect_count, const char *filename,
1028 uint8_t *buffer, bool quiet)
1029 {
1030 int pnum, ret = 0;
1031 ret = bdrv_read(bs, sect_num, buffer, sect_count);
1032 if (ret < 0) {
1033 error_report("Error while reading offset %" PRId64 " of %s: %s",
1034 sectors_to_bytes(sect_num), filename, strerror(-ret));
1035 return ret;
1036 }
1037 ret = is_allocated_sectors(buffer, sect_count, &pnum);
1038 if (ret || pnum != sect_count) {
1039 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1040 sectors_to_bytes(ret ? sect_num : sect_num + pnum));
1041 return 1;
1042 }
1043
1044 return 0;
1045 }
1046
1047 /*
1048 * Compares two images. Exit codes:
1049 *
1050 * 0 - Images are identical
1051 * 1 - Images differ
1052 * >1 - Error occurred
1053 */
1054 static int img_compare(int argc, char **argv)
1055 {
1056 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2;
1057 BlockBackend *blk1, *blk2;
1058 BlockDriverState *bs1, *bs2;
1059 int64_t total_sectors1, total_sectors2;
1060 uint8_t *buf1 = NULL, *buf2 = NULL;
1061 int pnum1, pnum2;
1062 int allocated1, allocated2;
1063 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */
1064 bool progress = false, quiet = false, strict = false;
1065 int flags;
1066 int64_t total_sectors;
1067 int64_t sector_num = 0;
1068 int64_t nb_sectors;
1069 int c, pnum;
1070 uint64_t progress_base;
1071
1072 cache = BDRV_DEFAULT_CACHE;
1073 for (;;) {
1074 c = getopt(argc, argv, "hf:F:T:pqs");
1075 if (c == -1) {
1076 break;
1077 }
1078 switch (c) {
1079 case '?':
1080 case 'h':
1081 help();
1082 break;
1083 case 'f':
1084 fmt1 = optarg;
1085 break;
1086 case 'F':
1087 fmt2 = optarg;
1088 break;
1089 case 'T':
1090 cache = optarg;
1091 break;
1092 case 'p':
1093 progress = true;
1094 break;
1095 case 'q':
1096 quiet = true;
1097 break;
1098 case 's':
1099 strict = true;
1100 break;
1101 }
1102 }
1103
1104 /* Progress is not shown in Quiet mode */
1105 if (quiet) {
1106 progress = false;
1107 }
1108
1109
1110 if (optind != argc - 2) {
1111 error_exit("Expecting two image file names");
1112 }
1113 filename1 = argv[optind++];
1114 filename2 = argv[optind++];
1115
1116 /* Initialize before goto out */
1117 qemu_progress_init(progress, 2.0);
1118
1119 flags = BDRV_O_FLAGS;
1120 ret = bdrv_parse_cache_flags(cache, &flags);
1121 if (ret < 0) {
1122 error_report("Invalid source cache option: %s", cache);
1123 ret = 2;
1124 goto out3;
1125 }
1126
1127 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet);
1128 if (!blk1) {
1129 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 = qemu_blockalign(bs1, IO_BUF_SIZE);
1142 buf2 = qemu_blockalign(bs2, IO_BUF_SIZE);
1143 total_sectors1 = bdrv_nb_sectors(bs1);
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 = bdrv_nb_sectors(bs2);
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 = bdrv_read(bs1, 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 = bdrv_read(bs2, 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(bs1, sector_num, nb_sectors,
1228 filename1, buf1, quiet);
1229 } else {
1230 ret = check_empty_sectors(bs2, 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 BlockDriverState *bs_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 bs_over = bs1;
1255 filename_over = filename1;
1256 } else {
1257 total_sectors_over = total_sectors2;
1258 bs_over = bs2;
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(bs_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(bs_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] = bdrv_nb_sectors(bs[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);
1528 if (!proto_drv) {
1529 error_report("Unknown protocol '%s'", out_filename);
1530 ret = -1;
1531 goto out;
1532 }
1533
1534 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1535 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
1536
1537 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1538 if (options && qemu_opts_do_parse(opts, options, NULL)) {
1539 error_report("Invalid options for file format '%s'", out_fmt);
1540 ret = -1;
1541 goto out;
1542 }
1543
1544 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512);
1545 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
1546 if (ret < 0) {
1547 goto out;
1548 }
1549
1550 /* Get backing file name if -o backing_file was used */
1551 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
1552 if (out_baseimg_param) {
1553 out_baseimg = out_baseimg_param;
1554 }
1555
1556 /* Check if compression is supported */
1557 if (compress) {
1558 bool encryption =
1559 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1560 const char *preallocation =
1561 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
1562
1563 if (!drv->bdrv_write_compressed) {
1564 error_report("Compression not supported for this file format");
1565 ret = -1;
1566 goto out;
1567 }
1568
1569 if (encryption) {
1570 error_report("Compression and encryption not supported at "
1571 "the same time");
1572 ret = -1;
1573 goto out;
1574 }
1575
1576 if (preallocation
1577 && strcmp(preallocation, "off"))
1578 {
1579 error_report("Compression and preallocation not supported at "
1580 "the same time");
1581 ret = -1;
1582 goto out;
1583 }
1584 }
1585
1586 if (!skip_create) {
1587 /* Create the new image */
1588 ret = bdrv_create(drv, out_filename, opts, &local_err);
1589 if (ret < 0) {
1590 error_report("%s: error while converting %s: %s",
1591 out_filename, out_fmt, error_get_pretty(local_err));
1592 error_free(local_err);
1593 goto out;
1594 }
1595 }
1596
1597 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
1598 ret = bdrv_parse_cache_flags(cache, &flags);
1599 if (ret < 0) {
1600 error_report("Invalid cache option: %s", cache);
1601 goto out;
1602 }
1603
1604 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1605 if (!out_blk) {
1606 ret = -1;
1607 goto out;
1608 }
1609 out_bs = blk_bs(out_blk);
1610
1611 bs_i = 0;
1612 bs_offset = 0;
1613
1614 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1615 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1616 * as maximum. */
1617 bufsectors = MIN(32768,
1618 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1619 out_bs->bl.discard_alignment))
1620 );
1621
1622 buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE);
1623
1624 if (skip_create) {
1625 int64_t output_sectors = bdrv_nb_sectors(out_bs);
1626 if (output_sectors < 0) {
1627 error_report("unable to get output image length: %s\n",
1628 strerror(-output_sectors));
1629 ret = -1;
1630 goto out;
1631 } else if (output_sectors < total_sectors) {
1632 error_report("output file is smaller than input file");
1633 ret = -1;
1634 goto out;
1635 }
1636 }
1637
1638 cluster_sectors = 0;
1639 ret = bdrv_get_info(out_bs, &bdi);
1640 if (ret < 0) {
1641 if (compress) {
1642 error_report("could not get block driver info");
1643 goto out;
1644 }
1645 } else {
1646 compress = compress || bdi.needs_compressed_writes;
1647 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1648 }
1649
1650 if (compress) {
1651 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
1652 error_report("invalid cluster size");
1653 ret = -1;
1654 goto out;
1655 }
1656 sector_num = 0;
1657
1658 nb_sectors = total_sectors;
1659
1660 for(;;) {
1661 int64_t bs_num;
1662 int remainder;
1663 uint8_t *buf2;
1664
1665 nb_sectors = total_sectors - sector_num;
1666 if (nb_sectors <= 0)
1667 break;
1668 if (nb_sectors >= cluster_sectors)
1669 n = cluster_sectors;
1670 else
1671 n = nb_sectors;
1672
1673 bs_num = sector_num - bs_offset;
1674 assert (bs_num >= 0);
1675 remainder = n;
1676 buf2 = buf;
1677 while (remainder > 0) {
1678 int nlow;
1679 while (bs_num == bs_sectors[bs_i]) {
1680 bs_offset += bs_sectors[bs_i];
1681 bs_i++;
1682 assert (bs_i < bs_n);
1683 bs_num = 0;
1684 /* printf("changing part: sector_num=%" PRId64 ", "
1685 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
1686 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1687 }
1688 assert (bs_num < bs_sectors[bs_i]);
1689
1690 nlow = remainder > bs_sectors[bs_i] - bs_num
1691 ? bs_sectors[bs_i] - bs_num : remainder;
1692
1693 ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow);
1694 if (ret < 0) {
1695 error_report("error while reading sector %" PRId64 ": %s",
1696 bs_num, strerror(-ret));
1697 goto out;
1698 }
1699
1700 buf2 += nlow * 512;
1701 bs_num += nlow;
1702
1703 remainder -= nlow;
1704 }
1705 assert (remainder == 0);
1706
1707 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1708 ret = bdrv_write_compressed(out_bs, sector_num, buf, n);
1709 if (ret != 0) {
1710 error_report("error while compressing sector %" PRId64
1711 ": %s", sector_num, strerror(-ret));
1712 goto out;
1713 }
1714 }
1715 sector_num += n;
1716 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
1717 }
1718 /* signal EOF to align */
1719 bdrv_write_compressed(out_bs, 0, NULL, 0);
1720 } else {
1721 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1722 bool count_allocated_sectors;
1723 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
1724
1725 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1726 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1727 if (ret < 0) {
1728 goto out;
1729 }
1730 has_zero_init = 1;
1731 }
1732
1733 sectors_to_read = total_sectors;
1734 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1735 restart:
1736 sector_num = 0; // total number of sectors converted so far
1737 sectors_read = 0;
1738 sector_num_next_status = 0;
1739
1740 for(;;) {
1741 nb_sectors = total_sectors - sector_num;
1742 if (nb_sectors <= 0) {
1743 if (count_allocated_sectors) {
1744 sectors_to_read = sectors_read;
1745 count_allocated_sectors = false;
1746 goto restart;
1747 }
1748 ret = 0;
1749 break;
1750 }
1751
1752 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1753 bs_offset += bs_sectors[bs_i];
1754 bs_i ++;
1755 assert (bs_i < bs_n);
1756 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1757 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
1758 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
1759 }
1760
1761 if ((out_baseimg || has_zero_init) &&
1762 sector_num >= sector_num_next_status) {
1763 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1764 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1765 n, &n1);
1766 if (ret < 0) {
1767 error_report("error while reading block status of sector %"
1768 PRId64 ": %s", sector_num - bs_offset,
1769 strerror(-ret));
1770 goto out;
1771 }
1772 /* If the output image is zero initialized, we are not working
1773 * on a shared base and the input is zero we can skip the next
1774 * n1 sectors */
1775 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
1776 sector_num += n1;
1777 continue;
1778 }
1779 /* If the output image is being created as a copy on write
1780 * image, assume that sectors which are unallocated in the
1781 * input image are present in both the output's and input's
1782 * base images (no need to copy them). */
1783 if (out_baseimg) {
1784 if (!(ret & BDRV_BLOCK_DATA)) {
1785 sector_num += n1;
1786 continue;
1787 }
1788 /* The next 'n1' sectors are allocated in the input image.
1789 * Copy only those as they may be followed by unallocated
1790 * sectors. */
1791 nb_sectors = n1;
1792 }
1793 /* avoid redundant callouts to get_block_status */
1794 sector_num_next_status = sector_num + n1;
1795 }
1796
1797 n = MIN(nb_sectors, bufsectors);
1798
1799 /* round down request length to an aligned sector, but
1800 * do not bother doing this on short requests. They happen
1801 * when we found an all-zero area, and the next sector to
1802 * write will not be sector_num + n. */
1803 if (cluster_sectors > 0 && n >= cluster_sectors) {
1804 int64_t next_aligned_sector = (sector_num + n);
1805 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1806 if (sector_num + n > next_aligned_sector) {
1807 n = next_aligned_sector - sector_num;
1808 }
1809 }
1810
1811 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
1812
1813 sectors_read += n;
1814 if (count_allocated_sectors) {
1815 sector_num += n;
1816 continue;
1817 }
1818
1819 n1 = n;
1820 ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n);
1821 if (ret < 0) {
1822 error_report("error while reading sector %" PRId64 ": %s",
1823 sector_num - bs_offset, strerror(-ret));
1824 goto out;
1825 }
1826 /* NOTE: at the same time we convert, we do not write zero
1827 sectors to have a chance to compress the image. Ideally, we
1828 should add a specific call to have the info to go faster */
1829 buf1 = buf;
1830 while (n > 0) {
1831 if (!has_zero_init ||
1832 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
1833 ret = bdrv_write(out_bs, sector_num, buf1, n1);
1834 if (ret < 0) {
1835 error_report("error while writing sector %" PRId64
1836 ": %s", sector_num, strerror(-ret));
1837 goto out;
1838 }
1839 }
1840 sector_num += n1;
1841 n -= n1;
1842 buf1 += n1 * 512;
1843 }
1844 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
1845 }
1846 }
1847 out:
1848 if (!ret) {
1849 qemu_progress_print(100, 0);
1850 }
1851 qemu_progress_end();
1852 qemu_opts_del(opts);
1853 qemu_opts_free(create_opts);
1854 qemu_vfree(buf);
1855 qemu_opts_del(sn_opts);
1856 blk_unref(out_blk);
1857 g_free(bs);
1858 if (blk) {
1859 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1860 blk_unref(blk[bs_i]);
1861 }
1862 g_free(blk);
1863 }
1864 g_free(bs_sectors);
1865 fail_getopt:
1866 g_free(options);
1867
1868 if (ret) {
1869 return 1;
1870 }
1871 return 0;
1872 }
1873
1874
1875 static void dump_snapshots(BlockDriverState *bs)
1876 {
1877 QEMUSnapshotInfo *sn_tab, *sn;
1878 int nb_sns, i;
1879
1880 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1881 if (nb_sns <= 0)
1882 return;
1883 printf("Snapshot list:\n");
1884 bdrv_snapshot_dump(fprintf, stdout, NULL);
1885 printf("\n");
1886 for(i = 0; i < nb_sns; i++) {
1887 sn = &sn_tab[i];
1888 bdrv_snapshot_dump(fprintf, stdout, sn);
1889 printf("\n");
1890 }
1891 g_free(sn_tab);
1892 }
1893
1894 static void dump_json_image_info_list(ImageInfoList *list)
1895 {
1896 Error *local_err = NULL;
1897 QString *str;
1898 QmpOutputVisitor *ov = qmp_output_visitor_new();
1899 QObject *obj;
1900 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
1901 &list, NULL, &local_err);
1902 obj = qmp_output_get_qobject(ov);
1903 str = qobject_to_json_pretty(obj);
1904 assert(str != NULL);
1905 printf("%s\n", qstring_get_str(str));
1906 qobject_decref(obj);
1907 qmp_output_visitor_cleanup(ov);
1908 QDECREF(str);
1909 }
1910
1911 static void dump_json_image_info(ImageInfo *info)
1912 {
1913 Error *local_err = NULL;
1914 QString *str;
1915 QmpOutputVisitor *ov = qmp_output_visitor_new();
1916 QObject *obj;
1917 visit_type_ImageInfo(qmp_output_get_visitor(ov),
1918 &info, NULL, &local_err);
1919 obj = qmp_output_get_qobject(ov);
1920 str = qobject_to_json_pretty(obj);
1921 assert(str != NULL);
1922 printf("%s\n", qstring_get_str(str));
1923 qobject_decref(obj);
1924 qmp_output_visitor_cleanup(ov);
1925 QDECREF(str);
1926 }
1927
1928 static void dump_human_image_info_list(ImageInfoList *list)
1929 {
1930 ImageInfoList *elem;
1931 bool delim = false;
1932
1933 for (elem = list; elem; elem = elem->next) {
1934 if (delim) {
1935 printf("\n");
1936 }
1937 delim = true;
1938
1939 bdrv_image_info_dump(fprintf, stdout, elem->value);
1940 }
1941 }
1942
1943 static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1944 {
1945 return strcmp(a, b) == 0;
1946 }
1947
1948 /**
1949 * Open an image file chain and return an ImageInfoList
1950 *
1951 * @filename: topmost image filename
1952 * @fmt: topmost image format (may be NULL to autodetect)
1953 * @chain: true - enumerate entire backing file chain
1954 * false - only topmost image file
1955 *
1956 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1957 * image file. If there was an error a message will have been printed to
1958 * stderr.
1959 */
1960 static ImageInfoList *collect_image_info_list(const char *filename,
1961 const char *fmt,
1962 bool chain)
1963 {
1964 ImageInfoList *head = NULL;
1965 ImageInfoList **last = &head;
1966 GHashTable *filenames;
1967 Error *err = NULL;
1968
1969 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1970
1971 while (filename) {
1972 BlockBackend *blk;
1973 BlockDriverState *bs;
1974 ImageInfo *info;
1975 ImageInfoList *elem;
1976
1977 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
1978 error_report("Backing file '%s' creates an infinite loop.",
1979 filename);
1980 goto err;
1981 }
1982 g_hash_table_insert(filenames, (gpointer)filename, NULL);
1983
1984 blk = img_open("image", filename, fmt,
1985 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
1986 if (!blk) {
1987 goto err;
1988 }
1989 bs = blk_bs(blk);
1990
1991 bdrv_query_image_info(bs, &info, &err);
1992 if (err) {
1993 error_report("%s", error_get_pretty(err));
1994 error_free(err);
1995 blk_unref(blk);
1996 goto err;
1997 }
1998
1999 elem = g_new0(ImageInfoList, 1);
2000 elem->value = info;
2001 *last = elem;
2002 last = &elem->next;
2003
2004 blk_unref(blk);
2005
2006 filename = fmt = NULL;
2007 if (chain) {
2008 if (info->has_full_backing_filename) {
2009 filename = info->full_backing_filename;
2010 } else if (info->has_backing_filename) {
2011 filename = info->backing_filename;
2012 }
2013 if (info->has_backing_filename_format) {
2014 fmt = info->backing_filename_format;
2015 }
2016 }
2017 }
2018 g_hash_table_destroy(filenames);
2019 return head;
2020
2021 err:
2022 qapi_free_ImageInfoList(head);
2023 g_hash_table_destroy(filenames);
2024 return NULL;
2025 }
2026
2027 static int img_info(int argc, char **argv)
2028 {
2029 int c;
2030 OutputFormat output_format = OFORMAT_HUMAN;
2031 bool chain = false;
2032 const char *filename, *fmt, *output;
2033 ImageInfoList *list;
2034
2035 fmt = NULL;
2036 output = NULL;
2037 for(;;) {
2038 int option_index = 0;
2039 static const struct option long_options[] = {
2040 {"help", no_argument, 0, 'h'},
2041 {"format", required_argument, 0, 'f'},
2042 {"output", required_argument, 0, OPTION_OUTPUT},
2043 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
2044 {0, 0, 0, 0}
2045 };
2046 c = getopt_long(argc, argv, "f:h",
2047 long_options, &option_index);
2048 if (c == -1) {
2049 break;
2050 }
2051 switch(c) {
2052 case '?':
2053 case 'h':
2054 help();
2055 break;
2056 case 'f':
2057 fmt = optarg;
2058 break;
2059 case OPTION_OUTPUT:
2060 output = optarg;
2061 break;
2062 case OPTION_BACKING_CHAIN:
2063 chain = true;
2064 break;
2065 }
2066 }
2067 if (optind != argc - 1) {
2068 error_exit("Expecting one image file name");
2069 }
2070 filename = argv[optind++];
2071
2072 if (output && !strcmp(output, "json")) {
2073 output_format = OFORMAT_JSON;
2074 } else if (output && !strcmp(output, "human")) {
2075 output_format = OFORMAT_HUMAN;
2076 } else if (output) {
2077 error_report("--output must be used with human or json as argument.");
2078 return 1;
2079 }
2080
2081 list = collect_image_info_list(filename, fmt, chain);
2082 if (!list) {
2083 return 1;
2084 }
2085
2086 switch (output_format) {
2087 case OFORMAT_HUMAN:
2088 dump_human_image_info_list(list);
2089 break;
2090 case OFORMAT_JSON:
2091 if (chain) {
2092 dump_json_image_info_list(list);
2093 } else {
2094 dump_json_image_info(list->value);
2095 }
2096 break;
2097 }
2098
2099 qapi_free_ImageInfoList(list);
2100 return 0;
2101 }
2102
2103
2104 typedef struct MapEntry {
2105 int flags;
2106 int depth;
2107 int64_t start;
2108 int64_t length;
2109 int64_t offset;
2110 BlockDriverState *bs;
2111 } MapEntry;
2112
2113 static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2114 MapEntry *next)
2115 {
2116 switch (output_format) {
2117 case OFORMAT_HUMAN:
2118 if ((e->flags & BDRV_BLOCK_DATA) &&
2119 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2120 error_report("File contains external, encrypted or compressed clusters.");
2121 exit(1);
2122 }
2123 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2124 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2125 e->start, e->length, e->offset, e->bs->filename);
2126 }
2127 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2128 * Modify the flags here to allow more coalescing.
2129 */
2130 if (next &&
2131 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2132 next->flags &= ~BDRV_BLOCK_DATA;
2133 next->flags |= BDRV_BLOCK_ZERO;
2134 }
2135 break;
2136 case OFORMAT_JSON:
2137 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2138 " \"zero\": %s, \"data\": %s",
2139 (e->start == 0 ? "[" : ",\n"),
2140 e->start, e->length, e->depth,
2141 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2142 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2143 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
2144 printf(", \"offset\": %"PRId64"", e->offset);
2145 }
2146 putchar('}');
2147
2148 if (!next) {
2149 printf("]\n");
2150 }
2151 break;
2152 }
2153 }
2154
2155 static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2156 int nb_sectors, MapEntry *e)
2157 {
2158 int64_t ret;
2159 int depth;
2160
2161 /* As an optimization, we could cache the current range of unallocated
2162 * clusters in each file of the chain, and avoid querying the same
2163 * range repeatedly.
2164 */
2165
2166 depth = 0;
2167 for (;;) {
2168 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2169 if (ret < 0) {
2170 return ret;
2171 }
2172 assert(nb_sectors);
2173 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2174 break;
2175 }
2176 bs = bs->backing_hd;
2177 if (bs == NULL) {
2178 ret = 0;
2179 break;
2180 }
2181
2182 depth++;
2183 }
2184
2185 e->start = sector_num * BDRV_SECTOR_SIZE;
2186 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2187 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2188 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2189 e->depth = depth;
2190 e->bs = bs;
2191 return 0;
2192 }
2193
2194 static int img_map(int argc, char **argv)
2195 {
2196 int c;
2197 OutputFormat output_format = OFORMAT_HUMAN;
2198 BlockBackend *blk;
2199 BlockDriverState *bs;
2200 const char *filename, *fmt, *output;
2201 int64_t length;
2202 MapEntry curr = { .length = 0 }, next;
2203 int ret = 0;
2204
2205 fmt = NULL;
2206 output = NULL;
2207 for (;;) {
2208 int option_index = 0;
2209 static const struct option long_options[] = {
2210 {"help", no_argument, 0, 'h'},
2211 {"format", required_argument, 0, 'f'},
2212 {"output", required_argument, 0, OPTION_OUTPUT},
2213 {0, 0, 0, 0}
2214 };
2215 c = getopt_long(argc, argv, "f:h",
2216 long_options, &option_index);
2217 if (c == -1) {
2218 break;
2219 }
2220 switch (c) {
2221 case '?':
2222 case 'h':
2223 help();
2224 break;
2225 case 'f':
2226 fmt = optarg;
2227 break;
2228 case OPTION_OUTPUT:
2229 output = optarg;
2230 break;
2231 }
2232 }
2233 if (optind != argc - 1) {
2234 error_exit("Expecting one image file name");
2235 }
2236 filename = argv[optind];
2237
2238 if (output && !strcmp(output, "json")) {
2239 output_format = OFORMAT_JSON;
2240 } else if (output && !strcmp(output, "human")) {
2241 output_format = OFORMAT_HUMAN;
2242 } else if (output) {
2243 error_report("--output must be used with human or json as argument.");
2244 return 1;
2245 }
2246
2247 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2248 if (!blk) {
2249 return 1;
2250 }
2251 bs = blk_bs(blk);
2252
2253 if (output_format == OFORMAT_HUMAN) {
2254 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2255 }
2256
2257 length = bdrv_getlength(bs);
2258 while (curr.start + curr.length < length) {
2259 int64_t nsectors_left;
2260 int64_t sector_num;
2261 int n;
2262
2263 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2264
2265 /* Probe up to 1 GiB at a time. */
2266 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2267 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2268 ret = get_block_status(bs, sector_num, n, &next);
2269
2270 if (ret < 0) {
2271 error_report("Could not read file metadata: %s", strerror(-ret));
2272 goto out;
2273 }
2274
2275 if (curr.length != 0 && curr.flags == next.flags &&
2276 curr.depth == next.depth &&
2277 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2278 curr.offset + curr.length == next.offset)) {
2279 curr.length += next.length;
2280 continue;
2281 }
2282
2283 if (curr.length > 0) {
2284 dump_map_entry(output_format, &curr, &next);
2285 }
2286 curr = next;
2287 }
2288
2289 dump_map_entry(output_format, &curr, NULL);
2290
2291 out:
2292 blk_unref(blk);
2293 return ret < 0;
2294 }
2295
2296 #define SNAPSHOT_LIST 1
2297 #define SNAPSHOT_CREATE 2
2298 #define SNAPSHOT_APPLY 3
2299 #define SNAPSHOT_DELETE 4
2300
2301 static int img_snapshot(int argc, char **argv)
2302 {
2303 BlockBackend *blk;
2304 BlockDriverState *bs;
2305 QEMUSnapshotInfo sn;
2306 char *filename, *snapshot_name = NULL;
2307 int c, ret = 0, bdrv_oflags;
2308 int action = 0;
2309 qemu_timeval tv;
2310 bool quiet = false;
2311 Error *err = NULL;
2312
2313 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
2314 /* Parse commandline parameters */
2315 for(;;) {
2316 c = getopt(argc, argv, "la:c:d:hq");
2317 if (c == -1) {
2318 break;
2319 }
2320 switch(c) {
2321 case '?':
2322 case 'h':
2323 help();
2324 return 0;
2325 case 'l':
2326 if (action) {
2327 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2328 return 0;
2329 }
2330 action = SNAPSHOT_LIST;
2331 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
2332 break;
2333 case 'a':
2334 if (action) {
2335 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2336 return 0;
2337 }
2338 action = SNAPSHOT_APPLY;
2339 snapshot_name = optarg;
2340 break;
2341 case 'c':
2342 if (action) {
2343 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2344 return 0;
2345 }
2346 action = SNAPSHOT_CREATE;
2347 snapshot_name = optarg;
2348 break;
2349 case 'd':
2350 if (action) {
2351 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2352 return 0;
2353 }
2354 action = SNAPSHOT_DELETE;
2355 snapshot_name = optarg;
2356 break;
2357 case 'q':
2358 quiet = true;
2359 break;
2360 }
2361 }
2362
2363 if (optind != argc - 1) {
2364 error_exit("Expecting one image file name");
2365 }
2366 filename = argv[optind++];
2367
2368 /* Open the image */
2369 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2370 if (!blk) {
2371 return 1;
2372 }
2373 bs = blk_bs(blk);
2374
2375 /* Perform the requested action */
2376 switch(action) {
2377 case SNAPSHOT_LIST:
2378 dump_snapshots(bs);
2379 break;
2380
2381 case SNAPSHOT_CREATE:
2382 memset(&sn, 0, sizeof(sn));
2383 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2384
2385 qemu_gettimeofday(&tv);
2386 sn.date_sec = tv.tv_sec;
2387 sn.date_nsec = tv.tv_usec * 1000;
2388
2389 ret = bdrv_snapshot_create(bs, &sn);
2390 if (ret) {
2391 error_report("Could not create snapshot '%s': %d (%s)",
2392 snapshot_name, ret, strerror(-ret));
2393 }
2394 break;
2395
2396 case SNAPSHOT_APPLY:
2397 ret = bdrv_snapshot_goto(bs, snapshot_name);
2398 if (ret) {
2399 error_report("Could not apply snapshot '%s': %d (%s)",
2400 snapshot_name, ret, strerror(-ret));
2401 }
2402 break;
2403
2404 case SNAPSHOT_DELETE:
2405 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
2406 if (err) {
2407 error_report("Could not delete snapshot '%s': (%s)",
2408 snapshot_name, error_get_pretty(err));
2409 error_free(err);
2410 ret = 1;
2411 }
2412 break;
2413 }
2414
2415 /* Cleanup */
2416 blk_unref(blk);
2417 if (ret) {
2418 return 1;
2419 }
2420 return 0;
2421 }
2422
2423 static int img_rebase(int argc, char **argv)
2424 {
2425 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
2426 BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL;
2427 BlockDriver *old_backing_drv, *new_backing_drv;
2428 char *filename;
2429 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2430 int c, flags, src_flags, ret;
2431 int unsafe = 0;
2432 int progress = 0;
2433 bool quiet = false;
2434 Error *local_err = NULL;
2435
2436 /* Parse commandline parameters */
2437 fmt = NULL;
2438 cache = BDRV_DEFAULT_CACHE;
2439 src_cache = BDRV_DEFAULT_CACHE;
2440 out_baseimg = NULL;
2441 out_basefmt = NULL;
2442 for(;;) {
2443 c = getopt(argc, argv, "hf:F:b:upt:T:q");
2444 if (c == -1) {
2445 break;
2446 }
2447 switch(c) {
2448 case '?':
2449 case 'h':
2450 help();
2451 return 0;
2452 case 'f':
2453 fmt = optarg;
2454 break;
2455 case 'F':
2456 out_basefmt = optarg;
2457 break;
2458 case 'b':
2459 out_baseimg = optarg;
2460 break;
2461 case 'u':
2462 unsafe = 1;
2463 break;
2464 case 'p':
2465 progress = 1;
2466 break;
2467 case 't':
2468 cache = optarg;
2469 break;
2470 case 'T':
2471 src_cache = optarg;
2472 break;
2473 case 'q':
2474 quiet = true;
2475 break;
2476 }
2477 }
2478
2479 if (quiet) {
2480 progress = 0;
2481 }
2482
2483 if (optind != argc - 1) {
2484 error_exit("Expecting one image file name");
2485 }
2486 if (!unsafe && !out_baseimg) {
2487 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2488 }
2489 filename = argv[optind++];
2490
2491 qemu_progress_init(progress, 2.0);
2492 qemu_progress_print(0, 100);
2493
2494 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
2495 ret = bdrv_parse_cache_flags(cache, &flags);
2496 if (ret < 0) {
2497 error_report("Invalid cache option: %s", cache);
2498 goto out;
2499 }
2500
2501 src_flags = BDRV_O_FLAGS;
2502 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2503 if (ret < 0) {
2504 error_report("Invalid source cache option: %s", src_cache);
2505 goto out;
2506 }
2507
2508 /*
2509 * Open the images.
2510 *
2511 * Ignore the old backing file for unsafe rebase in case we want to correct
2512 * the reference to a renamed or moved backing file.
2513 */
2514 blk = img_open("image", filename, fmt, flags, true, quiet);
2515 if (!blk) {
2516 ret = -1;
2517 goto out;
2518 }
2519 bs = blk_bs(blk);
2520
2521 /* Find the right drivers for the backing files */
2522 old_backing_drv = NULL;
2523 new_backing_drv = NULL;
2524
2525 if (!unsafe && bs->backing_format[0] != '\0') {
2526 old_backing_drv = bdrv_find_format(bs->backing_format);
2527 if (old_backing_drv == NULL) {
2528 error_report("Invalid format name: '%s'", bs->backing_format);
2529 ret = -1;
2530 goto out;
2531 }
2532 }
2533
2534 if (out_basefmt != NULL) {
2535 new_backing_drv = bdrv_find_format(out_basefmt);
2536 if (new_backing_drv == NULL) {
2537 error_report("Invalid format name: '%s'", out_basefmt);
2538 ret = -1;
2539 goto out;
2540 }
2541 }
2542
2543 /* For safe rebasing we need to compare old and new backing file */
2544 if (!unsafe) {
2545 char backing_name[1024];
2546
2547 blk_old_backing = blk_new_with_bs("old_backing", &error_abort);
2548 bs_old_backing = blk_bs(blk_old_backing);
2549 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2550 ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags,
2551 old_backing_drv, &local_err);
2552 if (ret) {
2553 error_report("Could not open old backing file '%s': %s",
2554 backing_name, error_get_pretty(local_err));
2555 error_free(local_err);
2556 goto out;
2557 }
2558 if (out_baseimg[0]) {
2559 blk_new_backing = blk_new_with_bs("new_backing", &error_abort);
2560 bs_new_backing = blk_bs(blk_new_backing);
2561 ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags,
2562 new_backing_drv, &local_err);
2563 if (ret) {
2564 error_report("Could not open new backing file '%s': %s",
2565 out_baseimg, error_get_pretty(local_err));
2566 error_free(local_err);
2567 goto out;
2568 }
2569 }
2570 }
2571
2572 /*
2573 * Check each unallocated cluster in the COW file. If it is unallocated,
2574 * accesses go to the backing file. We must therefore compare this cluster
2575 * in the old and new backing file, and if they differ we need to copy it
2576 * from the old backing file into the COW file.
2577 *
2578 * If qemu-img crashes during this step, no harm is done. The content of
2579 * the image is the same as the original one at any time.
2580 */
2581 if (!unsafe) {
2582 int64_t num_sectors;
2583 int64_t old_backing_num_sectors;
2584 int64_t new_backing_num_sectors = 0;
2585 uint64_t sector;
2586 int n;
2587 uint8_t * buf_old;
2588 uint8_t * buf_new;
2589 float local_progress = 0;
2590
2591 buf_old = qemu_blockalign(bs, IO_BUF_SIZE);
2592 buf_new = qemu_blockalign(bs, IO_BUF_SIZE);
2593
2594 num_sectors = bdrv_nb_sectors(bs);
2595 if (num_sectors < 0) {
2596 error_report("Could not get size of '%s': %s",
2597 filename, strerror(-num_sectors));
2598 ret = -1;
2599 goto out;
2600 }
2601 old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing);
2602 if (old_backing_num_sectors < 0) {
2603 char backing_name[1024];
2604
2605 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2606 error_report("Could not get size of '%s': %s",
2607 backing_name, strerror(-old_backing_num_sectors));
2608 ret = -1;
2609 goto out;
2610 }
2611 if (bs_new_backing) {
2612 new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing);
2613 if (new_backing_num_sectors < 0) {
2614 error_report("Could not get size of '%s': %s",
2615 out_baseimg, strerror(-new_backing_num_sectors));
2616 ret = -1;
2617 goto out;
2618 }
2619 }
2620
2621 if (num_sectors != 0) {
2622 local_progress = (float)100 /
2623 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2624 }
2625
2626 for (sector = 0; sector < num_sectors; sector += n) {
2627
2628 /* How many sectors can we handle with the next read? */
2629 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2630 n = (IO_BUF_SIZE / 512);
2631 } else {
2632 n = num_sectors - sector;
2633 }
2634
2635 /* If the cluster is allocated, we don't need to take action */
2636 ret = bdrv_is_allocated(bs, sector, n, &n);
2637 if (ret < 0) {
2638 error_report("error while reading image metadata: %s",
2639 strerror(-ret));
2640 goto out;
2641 }
2642 if (ret) {
2643 continue;
2644 }
2645
2646 /*
2647 * Read old and new backing file and take into consideration that
2648 * backing files may be smaller than the COW image.
2649 */
2650 if (sector >= old_backing_num_sectors) {
2651 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2652 } else {
2653 if (sector + n > old_backing_num_sectors) {
2654 n = old_backing_num_sectors - sector;
2655 }
2656
2657 ret = bdrv_read(bs_old_backing, sector, buf_old, n);
2658 if (ret < 0) {
2659 error_report("error while reading from old backing file");
2660 goto out;
2661 }
2662 }
2663
2664 if (sector >= new_backing_num_sectors || !bs_new_backing) {
2665 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2666 } else {
2667 if (sector + n > new_backing_num_sectors) {
2668 n = new_backing_num_sectors - sector;
2669 }
2670
2671 ret = bdrv_read(bs_new_backing, sector, buf_new, n);
2672 if (ret < 0) {
2673 error_report("error while reading from new backing file");
2674 goto out;
2675 }
2676 }
2677
2678 /* If they differ, we need to write to the COW file */
2679 uint64_t written = 0;
2680
2681 while (written < n) {
2682 int pnum;
2683
2684 if (compare_sectors(buf_old + written * 512,
2685 buf_new + written * 512, n - written, &pnum))
2686 {
2687 ret = bdrv_write(bs, sector + written,
2688 buf_old + written * 512, pnum);
2689 if (ret < 0) {
2690 error_report("Error while writing to COW image: %s",
2691 strerror(-ret));
2692 goto out;
2693 }
2694 }
2695
2696 written += pnum;
2697 }
2698 qemu_progress_print(local_progress, 100);
2699 }
2700
2701 qemu_vfree(buf_old);
2702 qemu_vfree(buf_new);
2703 }
2704
2705 /*
2706 * Change the backing file. All clusters that are different from the old
2707 * backing file are overwritten in the COW file now, so the visible content
2708 * doesn't change when we switch the backing file.
2709 */
2710 if (out_baseimg && *out_baseimg) {
2711 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2712 } else {
2713 ret = bdrv_change_backing_file(bs, NULL, NULL);
2714 }
2715
2716 if (ret == -ENOSPC) {
2717 error_report("Could not change the backing file to '%s': No "
2718 "space left in the file header", out_baseimg);
2719 } else if (ret < 0) {
2720 error_report("Could not change the backing file to '%s': %s",
2721 out_baseimg, strerror(-ret));
2722 }
2723
2724 qemu_progress_print(100, 0);
2725 /*
2726 * TODO At this point it is possible to check if any clusters that are
2727 * allocated in the COW file are the same in the backing file. If so, they
2728 * could be dropped from the COW file. Don't do this before switching the
2729 * backing file, in case of a crash this would lead to corruption.
2730 */
2731 out:
2732 qemu_progress_end();
2733 /* Cleanup */
2734 if (!unsafe) {
2735 blk_unref(blk_old_backing);
2736 blk_unref(blk_new_backing);
2737 }
2738
2739 blk_unref(blk);
2740 if (ret) {
2741 return 1;
2742 }
2743 return 0;
2744 }
2745
2746 static int img_resize(int argc, char **argv)
2747 {
2748 int c, ret, relative;
2749 const char *filename, *fmt, *size;
2750 int64_t n, total_size;
2751 bool quiet = false;
2752 BlockBackend *blk = NULL;
2753 BlockDriverState *bs = NULL;
2754 QemuOpts *param;
2755 static QemuOptsList resize_options = {
2756 .name = "resize_options",
2757 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2758 .desc = {
2759 {
2760 .name = BLOCK_OPT_SIZE,
2761 .type = QEMU_OPT_SIZE,
2762 .help = "Virtual disk size"
2763 }, {
2764 /* end of list */
2765 }
2766 },
2767 };
2768
2769 /* Remove size from argv manually so that negative numbers are not treated
2770 * as options by getopt. */
2771 if (argc < 3) {
2772 error_exit("Not enough arguments");
2773 return 1;
2774 }
2775
2776 size = argv[--argc];
2777
2778 /* Parse getopt arguments */
2779 fmt = NULL;
2780 for(;;) {
2781 c = getopt(argc, argv, "f:hq");
2782 if (c == -1) {
2783 break;
2784 }
2785 switch(c) {
2786 case '?':
2787 case 'h':
2788 help();
2789 break;
2790 case 'f':
2791 fmt = optarg;
2792 break;
2793 case 'q':
2794 quiet = true;
2795 break;
2796 }
2797 }
2798 if (optind != argc - 1) {
2799 error_exit("Expecting one image file name");
2800 }
2801 filename = argv[optind++];
2802
2803 /* Choose grow, shrink, or absolute resize mode */
2804 switch (size[0]) {
2805 case '+':
2806 relative = 1;
2807 size++;
2808 break;
2809 case '-':
2810 relative = -1;
2811 size++;
2812 break;
2813 default:
2814 relative = 0;
2815 break;
2816 }
2817
2818 /* Parse size */
2819 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
2820 if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
2821 /* Error message already printed when size parsing fails */
2822 ret = -1;
2823 qemu_opts_del(param);
2824 goto out;
2825 }
2826 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2827 qemu_opts_del(param);
2828
2829 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2830 true, quiet);
2831 if (!blk) {
2832 ret = -1;
2833 goto out;
2834 }
2835 bs = blk_bs(blk);
2836
2837 if (relative) {
2838 total_size = bdrv_getlength(bs) + n * relative;
2839 } else {
2840 total_size = n;
2841 }
2842 if (total_size <= 0) {
2843 error_report("New image size must be positive");
2844 ret = -1;
2845 goto out;
2846 }
2847
2848 ret = bdrv_truncate(bs, total_size);
2849 switch (ret) {
2850 case 0:
2851 qprintf(quiet, "Image resized.\n");
2852 break;
2853 case -ENOTSUP:
2854 error_report("This image does not support resize");
2855 break;
2856 case -EACCES:
2857 error_report("Image is read-only");
2858 break;
2859 default:
2860 error_report("Error resizing image (%d)", -ret);
2861 break;
2862 }
2863 out:
2864 blk_unref(blk);
2865 if (ret) {
2866 return 1;
2867 }
2868 return 0;
2869 }
2870
2871 static void amend_status_cb(BlockDriverState *bs,
2872 int64_t offset, int64_t total_work_size)
2873 {
2874 qemu_progress_print(100.f * offset / total_work_size, 0);
2875 }
2876
2877 static int img_amend(int argc, char **argv)
2878 {
2879 int c, ret = 0;
2880 char *options = NULL;
2881 QemuOptsList *create_opts = NULL;
2882 QemuOpts *opts = NULL;
2883 const char *fmt = NULL, *filename, *cache;
2884 int flags;
2885 bool quiet = false, progress = false;
2886 BlockBackend *blk = NULL;
2887 BlockDriverState *bs = NULL;
2888
2889 cache = BDRV_DEFAULT_CACHE;
2890 for (;;) {
2891 c = getopt(argc, argv, "ho:f:t:pq");
2892 if (c == -1) {
2893 break;
2894 }
2895
2896 switch (c) {
2897 case 'h':
2898 case '?':
2899 help();
2900 break;
2901 case 'o':
2902 if (!is_valid_option_list(optarg)) {
2903 error_report("Invalid option list: %s", optarg);
2904 ret = -1;
2905 goto out;
2906 }
2907 if (!options) {
2908 options = g_strdup(optarg);
2909 } else {
2910 char *old_options = options;
2911 options = g_strdup_printf("%s,%s", options, optarg);
2912 g_free(old_options);
2913 }
2914 break;
2915 case 'f':
2916 fmt = optarg;
2917 break;
2918 case 't':
2919 cache = optarg;
2920 break;
2921 case 'p':
2922 progress = true;
2923 break;
2924 case 'q':
2925 quiet = true;
2926 break;
2927 }
2928 }
2929
2930 if (!options) {
2931 error_exit("Must specify options (-o)");
2932 }
2933
2934 if (quiet) {
2935 progress = false;
2936 }
2937 qemu_progress_init(progress, 1.0);
2938
2939 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2940 if (fmt && has_help_option(options)) {
2941 /* If a format is explicitly specified (and possibly no filename is
2942 * given), print option help here */
2943 ret = print_block_option_help(filename, fmt);
2944 goto out;
2945 }
2946
2947 if (optind != argc - 1) {
2948 error_report("Expecting one image file name");
2949 ret = -1;
2950 goto out;
2951 }
2952
2953 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2954 ret = bdrv_parse_cache_flags(cache, &flags);
2955 if (ret < 0) {
2956 error_report("Invalid cache option: %s", cache);
2957 goto out;
2958 }
2959
2960 blk = img_open("image", filename, fmt, flags, true, quiet);
2961 if (!blk) {
2962 ret = -1;
2963 goto out;
2964 }
2965 bs = blk_bs(blk);
2966
2967 fmt = bs->drv->format_name;
2968
2969 if (has_help_option(options)) {
2970 /* If the format was auto-detected, print option help here */
2971 ret = print_block_option_help(filename, fmt);
2972 goto out;
2973 }
2974
2975 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
2976 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
2977 if (options && qemu_opts_do_parse(opts, options, NULL)) {
2978 error_report("Invalid options for file format '%s'", fmt);
2979 ret = -1;
2980 goto out;
2981 }
2982
2983 /* In case the driver does not call amend_status_cb() */
2984 qemu_progress_print(0.f, 0);
2985 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
2986 qemu_progress_print(100.f, 0);
2987 if (ret < 0) {
2988 error_report("Error while amending options: %s", strerror(-ret));
2989 goto out;
2990 }
2991
2992 out:
2993 qemu_progress_end();
2994
2995 blk_unref(blk);
2996 qemu_opts_del(opts);
2997 qemu_opts_free(create_opts);
2998 g_free(options);
2999
3000 if (ret) {
3001 return 1;
3002 }
3003 return 0;
3004 }
3005
3006 static const img_cmd_t img_cmds[] = {
3007 #define DEF(option, callback, arg_string) \
3008 { option, callback },
3009 #include "qemu-img-cmds.h"
3010 #undef DEF
3011 #undef GEN_DOCS
3012 { NULL, NULL, },
3013 };
3014
3015 int main(int argc, char **argv)
3016 {
3017 const img_cmd_t *cmd;
3018 const char *cmdname;
3019 Error *local_error = NULL;
3020 int c;
3021 static const struct option long_options[] = {
3022 {"help", no_argument, 0, 'h'},
3023 {"version", no_argument, 0, 'v'},
3024 {0, 0, 0, 0}
3025 };
3026
3027 #ifdef CONFIG_POSIX
3028 signal(SIGPIPE, SIG_IGN);
3029 #endif
3030
3031 error_set_progname(argv[0]);
3032 qemu_init_exec_dir(argv[0]);
3033
3034 if (qemu_init_main_loop(&local_error)) {
3035 error_report("%s", error_get_pretty(local_error));
3036 error_free(local_error);
3037 exit(EXIT_FAILURE);
3038 }
3039
3040 bdrv_init();
3041 if (argc < 2) {
3042 error_exit("Not enough arguments");
3043 }
3044 cmdname = argv[1];
3045
3046 /* find the command */
3047 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
3048 if (!strcmp(cmdname, cmd->name)) {
3049 return cmd->handler(argc - 1, argv + 1);
3050 }
3051 }
3052
3053 c = getopt_long(argc, argv, "h", long_options, NULL);
3054
3055 if (c == 'h') {
3056 help();
3057 }
3058 if (c == 'v') {
3059 printf(QEMU_IMG_VERSION);
3060 return 0;
3061 }
3062
3063 /* not found */
3064 error_exit("Command not found: %s", cmdname);
3065 }