2 * QEMU disk image utility
4 * Copyright (c) 2003-2008 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 #include "qemu/osdep.h"
25 #include "qemu-version.h"
26 #include "qapi/error.h"
27 #include "qapi-visit.h"
28 #include "qapi/qobject-output-visitor.h"
29 #include "qapi/qmp/qerror.h"
30 #include "qapi/qmp/qjson.h"
31 #include "qemu/cutils.h"
32 #include "qemu/config-file.h"
33 #include "qemu/option.h"
34 #include "qemu/error-report.h"
36 #include "qom/object_interfaces.h"
37 #include "sysemu/sysemu.h"
38 #include "sysemu/block-backend.h"
39 #include "block/block_int.h"
40 #include "block/blockjob.h"
41 #include "block/qapi.h"
42 #include "crypto/init.h"
43 #include "trace/control.h"
46 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
47 "\n" QEMU_COPYRIGHT "\n"
49 typedef struct img_cmd_t
{
51 int (*handler
)(int argc
, char **argv
);
56 OPTION_BACKING_CHAIN
= 257,
58 OPTION_IMAGE_OPTS
= 259,
60 OPTION_FLUSH_INTERVAL
= 261,
61 OPTION_NO_DRAIN
= 262,
64 typedef enum OutputFormat
{
69 /* Default to cache=writeback as data integrity is not important for qemu-img */
70 #define BDRV_DEFAULT_CACHE "writeback"
72 static void format_print(void *opaque
, const char *name
)
77 static void QEMU_NORETURN
GCC_FMT_ATTR(1, 2) error_exit(const char *fmt
, ...)
81 error_printf("qemu-img: ");
84 error_vprintf(fmt
, ap
);
87 error_printf("\nTry 'qemu-img --help' for more information\n");
91 /* Please keep in synch with qemu-img.texi */
92 static void QEMU_NORETURN
help(void)
94 const char *help_msg
=
96 "usage: qemu-img [standard options] command [command options]\n"
97 "QEMU disk image utility\n"
99 " '-h', '--help' display this help and exit\n"
100 " '-V', '--version' output version information and exit\n"
101 " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
102 " specify tracing options\n"
105 #define DEF(option, callback, arg_string) \
107 #include "qemu-img-cmds.h"
111 "Command parameters:\n"
112 " 'filename' is a disk image filename\n"
113 " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n"
114 " manual page for a description of the object properties. The most common\n"
115 " object type is a 'secret', which is used to supply passwords and/or\n"
116 " encryption keys.\n"
117 " 'fmt' is the disk image format. It is guessed automatically in most cases\n"
118 " 'cache' is the cache mode used to write the output disk image, the valid\n"
119 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
120 " 'directsync' and 'unsafe' (default for convert)\n"
121 " 'src_cache' is the cache mode used to read input disk images, the valid\n"
122 " options are the same as for the 'cache' option\n"
123 " 'size' is the disk image size in bytes. Optional suffixes\n"
124 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
125 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
126 " supported. 'b' is ignored.\n"
127 " 'output_filename' is the destination disk image filename\n"
128 " 'output_fmt' is the destination format\n"
129 " 'options' is a comma separated list of format specific options in a\n"
130 " name=value format. Use -o ? for an overview of the options supported by the\n"
132 " 'snapshot_param' is param used for internal snapshot, format\n"
133 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
135 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n"
137 " '-c' indicates that target image must be compressed (qcow format only)\n"
138 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
139 " match exactly. The image doesn't need a working backing file before\n"
140 " rebasing in this case (useful for renaming the backing file)\n"
141 " '-h' with or without a command shows this help and lists the supported formats\n"
142 " '-p' show progress of command (only certain commands)\n"
143 " '-q' use Quiet mode - do not print any output (except errors)\n"
144 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
145 " contain only zeros for qemu-img to create a sparse image during\n"
146 " conversion. If the number of bytes is 0, the source will not be scanned for\n"
147 " unallocated or zero sectors, and the destination image will always be\n"
149 " '--output' takes the format in which the output must be done (human or json)\n"
150 " '-n' skips the target volume creation (useful if the volume is created\n"
151 " prior to running qemu-img)\n"
153 "Parameters to check subcommand:\n"
154 " '-r' tries to repair any inconsistencies that are found during the check.\n"
155 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
156 " kinds of errors, with a higher risk of choosing the wrong fix or\n"
157 " hiding corruption that has already occurred.\n"
159 "Parameters to snapshot subcommand:\n"
160 " 'snapshot' is the name of the snapshot to create, apply or delete\n"
161 " '-a' applies a snapshot (revert disk to saved state)\n"
162 " '-c' creates a snapshot\n"
163 " '-d' deletes a snapshot\n"
164 " '-l' lists all snapshots in the given image\n"
166 "Parameters to compare subcommand:\n"
167 " '-f' first image format\n"
168 " '-F' second image format\n"
169 " '-s' run in Strict mode - fail on different image size or sector allocation\n"
171 "Parameters to dd subcommand:\n"
172 " 'bs=BYTES' read and write up to BYTES bytes at a time "
174 " 'count=N' copy only N input blocks\n"
175 " 'if=FILE' read from FILE\n"
176 " 'of=FILE' write to FILE\n"
177 " 'skip=N' skip N bs-sized blocks at the start of input\n";
179 printf("%s\nSupported formats:", help_msg
);
180 bdrv_iterate_format(format_print
, NULL
);
185 static QemuOptsList qemu_object_opts
= {
187 .implied_opt_name
= "qom-type",
188 .head
= QTAILQ_HEAD_INITIALIZER(qemu_object_opts
.head
),
194 static QemuOptsList qemu_source_opts
= {
196 .implied_opt_name
= "file",
197 .head
= QTAILQ_HEAD_INITIALIZER(qemu_source_opts
.head
),
203 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet
, const char *fmt
, ...)
209 ret
= vprintf(fmt
, args
);
216 static int print_block_option_help(const char *filename
, const char *fmt
)
218 BlockDriver
*drv
, *proto_drv
;
219 QemuOptsList
*create_opts
= NULL
;
220 Error
*local_err
= NULL
;
222 /* Find driver and parse its options */
223 drv
= bdrv_find_format(fmt
);
225 error_report("Unknown file format '%s'", fmt
);
229 create_opts
= qemu_opts_append(create_opts
, drv
->create_opts
);
231 proto_drv
= bdrv_find_protocol(filename
, true, &local_err
);
233 error_report_err(local_err
);
234 qemu_opts_free(create_opts
);
237 create_opts
= qemu_opts_append(create_opts
, proto_drv
->create_opts
);
240 qemu_opts_print_help(create_opts
);
241 qemu_opts_free(create_opts
);
246 static int img_open_password(BlockBackend
*blk
, const char *filename
,
247 int flags
, bool quiet
)
249 BlockDriverState
*bs
;
253 if (bdrv_is_encrypted(bs
) && bdrv_key_required(bs
) &&
254 !(flags
& BDRV_O_NO_IO
)) {
255 qprintf(quiet
, "Disk image '%s' is encrypted.\n", filename
);
256 if (qemu_read_password(password
, sizeof(password
)) < 0) {
257 error_report("No password given");
260 if (bdrv_set_key(bs
, password
) < 0) {
261 error_report("invalid password");
269 static BlockBackend
*img_open_opts(const char *optstr
,
270 QemuOpts
*opts
, int flags
, bool writethrough
,
274 Error
*local_err
= NULL
;
276 options
= qemu_opts_to_qdict(opts
, NULL
);
277 blk
= blk_new_open(NULL
, NULL
, options
, flags
, &local_err
);
279 error_reportf_err(local_err
, "Could not open '%s': ", optstr
);
282 blk_set_enable_write_cache(blk
, !writethrough
);
284 if (img_open_password(blk
, optstr
, flags
, quiet
) < 0) {
291 static BlockBackend
*img_open_file(const char *filename
,
292 const char *fmt
, int flags
,
293 bool writethrough
, bool quiet
)
296 Error
*local_err
= NULL
;
297 QDict
*options
= NULL
;
300 options
= qdict_new();
301 qdict_put(options
, "driver", qstring_from_str(fmt
));
304 blk
= blk_new_open(filename
, NULL
, options
, flags
, &local_err
);
306 error_reportf_err(local_err
, "Could not open '%s': ", filename
);
309 blk_set_enable_write_cache(blk
, !writethrough
);
311 if (img_open_password(blk
, filename
, flags
, quiet
) < 0) {
319 static BlockBackend
*img_open(bool image_opts
,
320 const char *filename
,
321 const char *fmt
, int flags
, bool writethrough
,
328 error_report("--image-opts and --format are mutually exclusive");
331 opts
= qemu_opts_parse_noisily(qemu_find_opts("source"),
336 blk
= img_open_opts(filename
, opts
, flags
, writethrough
, quiet
);
338 blk
= img_open_file(filename
, fmt
, flags
, writethrough
, quiet
);
344 static int add_old_style_options(const char *fmt
, QemuOpts
*opts
,
345 const char *base_filename
,
346 const char *base_fmt
)
351 qemu_opt_set(opts
, BLOCK_OPT_BACKING_FILE
, base_filename
, &err
);
353 error_report("Backing file not supported for file format '%s'",
360 qemu_opt_set(opts
, BLOCK_OPT_BACKING_FMT
, base_fmt
, &err
);
362 error_report("Backing file format not supported for file "
371 static int img_create(int argc
, char **argv
)
374 uint64_t img_size
= -1;
375 const char *fmt
= "raw";
376 const char *base_fmt
= NULL
;
377 const char *filename
;
378 const char *base_filename
= NULL
;
379 char *options
= NULL
;
380 Error
*local_err
= NULL
;
384 static const struct option long_options
[] = {
385 {"help", no_argument
, 0, 'h'},
386 {"object", required_argument
, 0, OPTION_OBJECT
},
389 c
= getopt_long(argc
, argv
, "F:b:f:he6o:q",
403 base_filename
= optarg
;
409 error_report("option -e is deprecated, please use \'-o "
410 "encryption\' instead!");
413 error_report("option -6 is deprecated, please use \'-o "
414 "compat6\' instead!");
417 if (!is_valid_option_list(optarg
)) {
418 error_report("Invalid option list: %s", optarg
);
422 options
= g_strdup(optarg
);
424 char *old_options
= options
;
425 options
= g_strdup_printf("%s,%s", options
, optarg
);
432 case OPTION_OBJECT
: {
434 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
443 /* Get the filename */
444 filename
= (optind
< argc
) ? argv
[optind
] : NULL
;
445 if (options
&& has_help_option(options
)) {
447 return print_block_option_help(filename
, fmt
);
450 if (optind
>= argc
) {
451 error_exit("Expecting image file name");
455 if (qemu_opts_foreach(&qemu_object_opts
,
456 user_creatable_add_opts_foreach
,
461 /* Get image size, if specified */
465 sval
= qemu_strtosz_suffix(argv
[optind
++], &end
,
466 QEMU_STRTOSZ_DEFSUFFIX_B
);
467 if (sval
< 0 || *end
) {
468 if (sval
== -ERANGE
) {
469 error_report("Image size must be less than 8 EiB!");
471 error_report("Invalid image size specified! You may use k, M, "
472 "G, T, P or E suffixes for ");
473 error_report("kilobytes, megabytes, gigabytes, terabytes, "
474 "petabytes and exabytes.");
478 img_size
= (uint64_t)sval
;
480 if (optind
!= argc
) {
481 error_exit("Unexpected argument: %s", argv
[optind
]);
484 bdrv_img_create(filename
, fmt
, base_filename
, base_fmt
,
485 options
, img_size
, 0, &local_err
, quiet
);
487 error_reportf_err(local_err
, "%s: ", filename
);
499 static void dump_json_image_check(ImageCheck
*check
, bool quiet
)
503 Visitor
*v
= qobject_output_visitor_new(&obj
);
505 visit_type_ImageCheck(v
, NULL
, &check
, &error_abort
);
506 visit_complete(v
, &obj
);
507 str
= qobject_to_json_pretty(obj
);
509 qprintf(quiet
, "%s\n", qstring_get_str(str
));
515 static void dump_human_image_check(ImageCheck
*check
, bool quiet
)
517 if (!(check
->corruptions
|| check
->leaks
|| check
->check_errors
)) {
518 qprintf(quiet
, "No errors were found on the image.\n");
520 if (check
->corruptions
) {
521 qprintf(quiet
, "\n%" PRId64
" errors were found on the image.\n"
522 "Data may be corrupted, or further writes to the image "
529 "\n%" PRId64
" leaked clusters were found on the image.\n"
530 "This means waste of disk space, but no harm to data.\n",
534 if (check
->check_errors
) {
537 " internal errors have occurred during the check.\n",
538 check
->check_errors
);
542 if (check
->total_clusters
!= 0 && check
->allocated_clusters
!= 0) {
543 qprintf(quiet
, "%" PRId64
"/%" PRId64
" = %0.2f%% allocated, "
544 "%0.2f%% fragmented, %0.2f%% compressed clusters\n",
545 check
->allocated_clusters
, check
->total_clusters
,
546 check
->allocated_clusters
* 100.0 / check
->total_clusters
,
547 check
->fragmented_clusters
* 100.0 / check
->allocated_clusters
,
548 check
->compressed_clusters
* 100.0 /
549 check
->allocated_clusters
);
552 if (check
->image_end_offset
) {
554 "Image end offset: %" PRId64
"\n", check
->image_end_offset
);
558 static int collect_image_check(BlockDriverState
*bs
,
560 const char *filename
,
565 BdrvCheckResult result
;
567 ret
= bdrv_check(bs
, &result
, fix
);
572 check
->filename
= g_strdup(filename
);
573 check
->format
= g_strdup(bdrv_get_format_name(bs
));
574 check
->check_errors
= result
.check_errors
;
575 check
->corruptions
= result
.corruptions
;
576 check
->has_corruptions
= result
.corruptions
!= 0;
577 check
->leaks
= result
.leaks
;
578 check
->has_leaks
= result
.leaks
!= 0;
579 check
->corruptions_fixed
= result
.corruptions_fixed
;
580 check
->has_corruptions_fixed
= result
.corruptions
!= 0;
581 check
->leaks_fixed
= result
.leaks_fixed
;
582 check
->has_leaks_fixed
= result
.leaks
!= 0;
583 check
->image_end_offset
= result
.image_end_offset
;
584 check
->has_image_end_offset
= result
.image_end_offset
!= 0;
585 check
->total_clusters
= result
.bfi
.total_clusters
;
586 check
->has_total_clusters
= result
.bfi
.total_clusters
!= 0;
587 check
->allocated_clusters
= result
.bfi
.allocated_clusters
;
588 check
->has_allocated_clusters
= result
.bfi
.allocated_clusters
!= 0;
589 check
->fragmented_clusters
= result
.bfi
.fragmented_clusters
;
590 check
->has_fragmented_clusters
= result
.bfi
.fragmented_clusters
!= 0;
591 check
->compressed_clusters
= result
.bfi
.compressed_clusters
;
592 check
->has_compressed_clusters
= result
.bfi
.compressed_clusters
!= 0;
598 * Checks an image for consistency. Exit codes:
600 * 0 - Check completed, image is good
601 * 1 - Check not completed because of internal errors
602 * 2 - Check completed, image is corrupted
603 * 3 - Check completed, image has leaked clusters, but is good otherwise
604 * 63 - Checks are not supported by the image format
606 static int img_check(int argc
, char **argv
)
609 OutputFormat output_format
= OFORMAT_HUMAN
;
610 const char *filename
, *fmt
, *output
, *cache
;
612 BlockDriverState
*bs
;
614 int flags
= BDRV_O_CHECK
;
618 bool image_opts
= false;
622 cache
= BDRV_DEFAULT_CACHE
;
625 int option_index
= 0;
626 static const struct option long_options
[] = {
627 {"help", no_argument
, 0, 'h'},
628 {"format", required_argument
, 0, 'f'},
629 {"repair", required_argument
, 0, 'r'},
630 {"output", required_argument
, 0, OPTION_OUTPUT
},
631 {"object", required_argument
, 0, OPTION_OBJECT
},
632 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
635 c
= getopt_long(argc
, argv
, "hf:r:T:q",
636 long_options
, &option_index
);
649 flags
|= BDRV_O_RDWR
;
651 if (!strcmp(optarg
, "leaks")) {
652 fix
= BDRV_FIX_LEAKS
;
653 } else if (!strcmp(optarg
, "all")) {
654 fix
= BDRV_FIX_LEAKS
| BDRV_FIX_ERRORS
;
656 error_exit("Unknown option value for -r "
657 "(expecting 'leaks' or 'all'): %s", optarg
);
669 case OPTION_OBJECT
: {
671 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
677 case OPTION_IMAGE_OPTS
:
682 if (optind
!= argc
- 1) {
683 error_exit("Expecting one image file name");
685 filename
= argv
[optind
++];
687 if (output
&& !strcmp(output
, "json")) {
688 output_format
= OFORMAT_JSON
;
689 } else if (output
&& !strcmp(output
, "human")) {
690 output_format
= OFORMAT_HUMAN
;
692 error_report("--output must be used with human or json as argument.");
696 if (qemu_opts_foreach(&qemu_object_opts
,
697 user_creatable_add_opts_foreach
,
702 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
704 error_report("Invalid source cache option: %s", cache
);
708 blk
= img_open(image_opts
, filename
, fmt
, flags
, writethrough
, quiet
);
714 check
= g_new0(ImageCheck
, 1);
715 ret
= collect_image_check(bs
, check
, filename
, fmt
, fix
);
717 if (ret
== -ENOTSUP
) {
718 error_report("This image format does not support checks");
723 if (check
->corruptions_fixed
|| check
->leaks_fixed
) {
724 int corruptions_fixed
, leaks_fixed
;
726 leaks_fixed
= check
->leaks_fixed
;
727 corruptions_fixed
= check
->corruptions_fixed
;
729 if (output_format
== OFORMAT_HUMAN
) {
731 "The following inconsistencies were found and repaired:\n\n"
732 " %" PRId64
" leaked clusters\n"
733 " %" PRId64
" corruptions\n\n"
734 "Double checking the fixed image now...\n",
736 check
->corruptions_fixed
);
739 ret
= collect_image_check(bs
, check
, filename
, fmt
, 0);
741 check
->leaks_fixed
= leaks_fixed
;
742 check
->corruptions_fixed
= corruptions_fixed
;
746 switch (output_format
) {
748 dump_human_image_check(check
, quiet
);
751 dump_json_image_check(check
, quiet
);
756 if (ret
|| check
->check_errors
) {
758 error_report("Check failed: %s", strerror(-ret
));
760 error_report("Check failed");
766 if (check
->corruptions
) {
768 } else if (check
->leaks
) {
775 qapi_free_ImageCheck(check
);
780 typedef struct CommonBlockJobCBInfo
{
781 BlockDriverState
*bs
;
783 } CommonBlockJobCBInfo
;
785 static void common_block_job_cb(void *opaque
, int ret
)
787 CommonBlockJobCBInfo
*cbi
= opaque
;
790 error_setg_errno(cbi
->errp
, -ret
, "Block job failed");
794 static void run_block_job(BlockJob
*job
, Error
**errp
)
796 AioContext
*aio_context
= blk_get_aio_context(job
->blk
);
798 aio_context_acquire(aio_context
);
800 aio_poll(aio_context
, true);
801 qemu_progress_print(job
->len
?
802 ((float)job
->offset
/ job
->len
* 100.f
) : 0.0f
, 0);
803 } while (!job
->ready
);
805 block_job_complete_sync(job
, errp
);
806 aio_context_release(aio_context
);
808 /* A block job may finish instantaneously without publishing any progress,
809 * so just signal completion here */
810 qemu_progress_print(100.f
, 0);
813 static int img_commit(int argc
, char **argv
)
816 const char *filename
, *fmt
, *cache
, *base
;
818 BlockDriverState
*bs
, *base_bs
;
819 bool progress
= false, quiet
= false, drop
= false;
821 Error
*local_err
= NULL
;
822 CommonBlockJobCBInfo cbi
;
823 bool image_opts
= false;
824 AioContext
*aio_context
;
827 cache
= BDRV_DEFAULT_CACHE
;
830 static const struct option long_options
[] = {
831 {"help", no_argument
, 0, 'h'},
832 {"object", required_argument
, 0, OPTION_OBJECT
},
833 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
836 c
= getopt_long(argc
, argv
, "f:ht:b:dpq",
866 case OPTION_OBJECT
: {
868 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
874 case OPTION_IMAGE_OPTS
:
880 /* Progress is not shown in Quiet mode */
885 if (optind
!= argc
- 1) {
886 error_exit("Expecting one image file name");
888 filename
= argv
[optind
++];
890 if (qemu_opts_foreach(&qemu_object_opts
,
891 user_creatable_add_opts_foreach
,
896 flags
= BDRV_O_RDWR
| BDRV_O_UNMAP
;
897 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
899 error_report("Invalid cache option: %s", cache
);
903 blk
= img_open(image_opts
, filename
, fmt
, flags
, writethrough
, quiet
);
909 qemu_progress_init(progress
, 1.f
);
910 qemu_progress_print(0.f
, 100);
913 base_bs
= bdrv_find_backing_image(bs
, base
);
915 error_setg(&local_err
, QERR_BASE_NOT_FOUND
, base
);
919 /* This is different from QMP, which by default uses the deepest file in
920 * the backing chain (i.e., the very base); however, the traditional
921 * behavior of qemu-img commit is using the immediate backing file. */
922 base_bs
= backing_bs(bs
);
924 error_setg(&local_err
, "Image does not have a backing file");
929 cbi
= (CommonBlockJobCBInfo
){
934 aio_context
= bdrv_get_aio_context(bs
);
935 aio_context_acquire(aio_context
);
936 commit_active_start("commit", bs
, base_bs
, BLOCK_JOB_DEFAULT
, 0,
937 BLOCKDEV_ON_ERROR_REPORT
, common_block_job_cb
, &cbi
,
939 aio_context_release(aio_context
);
944 /* When the block job completes, the BlockBackend reference will point to
945 * the old backing file. In order to avoid that the top image is already
946 * deleted, so we can still empty it afterwards, increment the reference
947 * counter here preemptively. */
952 run_block_job(bs
->job
, &local_err
);
957 if (!drop
&& bs
->drv
->bdrv_make_empty
) {
958 ret
= bs
->drv
->bdrv_make_empty(bs
);
960 error_setg_errno(&local_err
, -ret
, "Could not empty %s",
977 error_report_err(local_err
);
981 qprintf(quiet
, "Image committed.\n");
986 * Returns true iff the first sector pointed to by 'buf' contains at least
989 * 'pnum' is set to the number of sectors (including and immediately following
990 * the first one) that are known to be in the same allocated/unallocated state.
992 static int is_allocated_sectors(const uint8_t *buf
, int n
, int *pnum
)
1001 is_zero
= buffer_is_zero(buf
, 512);
1002 for(i
= 1; i
< n
; i
++) {
1004 if (is_zero
!= buffer_is_zero(buf
, 512)) {
1013 * Like is_allocated_sectors, but if the buffer starts with a used sector,
1014 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
1015 * breaking up write requests for only small sparse areas.
1017 static int is_allocated_sectors_min(const uint8_t *buf
, int n
, int *pnum
,
1021 int num_checked
, num_used
;
1027 ret
= is_allocated_sectors(buf
, n
, pnum
);
1033 buf
+= BDRV_SECTOR_SIZE
* *pnum
;
1035 num_checked
= num_used
;
1038 ret
= is_allocated_sectors(buf
, n
, pnum
);
1040 buf
+= BDRV_SECTOR_SIZE
* *pnum
;
1042 num_checked
+= *pnum
;
1044 num_used
= num_checked
;
1045 } else if (*pnum
>= min
) {
1055 * Compares two buffers sector by sector. Returns 0 if the first sector of both
1056 * buffers matches, non-zero otherwise.
1058 * pnum is set to the number of sectors (including and immediately following
1059 * the first one) that are known to have the same comparison result
1061 static int compare_sectors(const uint8_t *buf1
, const uint8_t *buf2
, int n
,
1072 res
= !!memcmp(buf1
, buf2
, 512);
1073 for(i
= 1; i
< n
; i
++) {
1077 if (!!memcmp(buf1
, buf2
, 512) != res
) {
1086 #define IO_BUF_SIZE (2 * 1024 * 1024)
1088 static int64_t sectors_to_bytes(int64_t sectors
)
1090 return sectors
<< BDRV_SECTOR_BITS
;
1093 static int64_t sectors_to_process(int64_t total
, int64_t from
)
1095 return MIN(total
- from
, IO_BUF_SIZE
>> BDRV_SECTOR_BITS
);
1099 * Check if passed sectors are empty (not allocated or contain only 0 bytes)
1101 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
1102 * data and negative value on error.
1104 * @param blk: BlockBackend for the image
1105 * @param sect_num: Number of first sector to check
1106 * @param sect_count: Number of sectors to check
1107 * @param filename: Name of disk file we are checking (logging purpose)
1108 * @param buffer: Allocated buffer for storing read data
1109 * @param quiet: Flag for quiet mode
1111 static int check_empty_sectors(BlockBackend
*blk
, int64_t sect_num
,
1112 int sect_count
, const char *filename
,
1113 uint8_t *buffer
, bool quiet
)
1116 ret
= blk_pread(blk
, sect_num
<< BDRV_SECTOR_BITS
, buffer
,
1117 sect_count
<< BDRV_SECTOR_BITS
);
1119 error_report("Error while reading offset %" PRId64
" of %s: %s",
1120 sectors_to_bytes(sect_num
), filename
, strerror(-ret
));
1123 ret
= is_allocated_sectors(buffer
, sect_count
, &pnum
);
1124 if (ret
|| pnum
!= sect_count
) {
1125 qprintf(quiet
, "Content mismatch at offset %" PRId64
"!\n",
1126 sectors_to_bytes(ret
? sect_num
: sect_num
+ pnum
));
1134 * Compares two images. Exit codes:
1136 * 0 - Images are identical
1138 * >1 - Error occurred
1140 static int img_compare(int argc
, char **argv
)
1142 const char *fmt1
= NULL
, *fmt2
= NULL
, *cache
, *filename1
, *filename2
;
1143 BlockBackend
*blk1
, *blk2
;
1144 BlockDriverState
*bs1
, *bs2
;
1145 int64_t total_sectors1
, total_sectors2
;
1146 uint8_t *buf1
= NULL
, *buf2
= NULL
;
1148 int allocated1
, allocated2
;
1149 int ret
= 0; /* return value - 0 Ident, 1 Different, >1 Error */
1150 bool progress
= false, quiet
= false, strict
= false;
1153 int64_t total_sectors
;
1154 int64_t sector_num
= 0;
1157 uint64_t progress_base
;
1158 bool image_opts
= false;
1160 cache
= BDRV_DEFAULT_CACHE
;
1162 static const struct option long_options
[] = {
1163 {"help", no_argument
, 0, 'h'},
1164 {"object", required_argument
, 0, OPTION_OBJECT
},
1165 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
1168 c
= getopt_long(argc
, argv
, "hf:F:T:pqs",
1169 long_options
, NULL
);
1196 case OPTION_OBJECT
: {
1198 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
1205 case OPTION_IMAGE_OPTS
:
1211 /* Progress is not shown in Quiet mode */
1217 if (optind
!= argc
- 2) {
1218 error_exit("Expecting two image file names");
1220 filename1
= argv
[optind
++];
1221 filename2
= argv
[optind
++];
1223 if (qemu_opts_foreach(&qemu_object_opts
,
1224 user_creatable_add_opts_foreach
,
1230 /* Initialize before goto out */
1231 qemu_progress_init(progress
, 2.0);
1234 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
1236 error_report("Invalid source cache option: %s", cache
);
1241 blk1
= img_open(image_opts
, filename1
, fmt1
, flags
, writethrough
, quiet
);
1247 blk2
= img_open(image_opts
, filename2
, fmt2
, flags
, writethrough
, quiet
);
1255 buf1
= blk_blockalign(blk1
, IO_BUF_SIZE
);
1256 buf2
= blk_blockalign(blk2
, IO_BUF_SIZE
);
1257 total_sectors1
= blk_nb_sectors(blk1
);
1258 if (total_sectors1
< 0) {
1259 error_report("Can't get size of %s: %s",
1260 filename1
, strerror(-total_sectors1
));
1264 total_sectors2
= blk_nb_sectors(blk2
);
1265 if (total_sectors2
< 0) {
1266 error_report("Can't get size of %s: %s",
1267 filename2
, strerror(-total_sectors2
));
1271 total_sectors
= MIN(total_sectors1
, total_sectors2
);
1272 progress_base
= MAX(total_sectors1
, total_sectors2
);
1274 qemu_progress_print(0, 100);
1276 if (strict
&& total_sectors1
!= total_sectors2
) {
1278 qprintf(quiet
, "Strict mode: Image size mismatch!\n");
1283 int64_t status1
, status2
;
1284 BlockDriverState
*file
;
1286 nb_sectors
= sectors_to_process(total_sectors
, sector_num
);
1287 if (nb_sectors
<= 0) {
1290 status1
= bdrv_get_block_status_above(bs1
, NULL
, sector_num
,
1291 total_sectors1
- sector_num
,
1295 error_report("Sector allocation test failed for %s", filename1
);
1298 allocated1
= status1
& BDRV_BLOCK_ALLOCATED
;
1300 status2
= bdrv_get_block_status_above(bs2
, NULL
, sector_num
,
1301 total_sectors2
- sector_num
,
1305 error_report("Sector allocation test failed for %s", filename2
);
1308 allocated2
= status2
& BDRV_BLOCK_ALLOCATED
;
1310 nb_sectors
= MIN(nb_sectors
, pnum1
);
1313 nb_sectors
= MIN(nb_sectors
, pnum2
);
1317 if ((status1
& ~BDRV_BLOCK_OFFSET_MASK
) !=
1318 (status2
& ~BDRV_BLOCK_OFFSET_MASK
)) {
1320 qprintf(quiet
, "Strict mode: Offset %" PRId64
1321 " block status mismatch!\n",
1322 sectors_to_bytes(sector_num
));
1326 if ((status1
& BDRV_BLOCK_ZERO
) && (status2
& BDRV_BLOCK_ZERO
)) {
1327 nb_sectors
= MIN(pnum1
, pnum2
);
1328 } else if (allocated1
== allocated2
) {
1330 ret
= blk_pread(blk1
, sector_num
<< BDRV_SECTOR_BITS
, buf1
,
1331 nb_sectors
<< BDRV_SECTOR_BITS
);
1333 error_report("Error while reading offset %" PRId64
" of %s:"
1334 " %s", sectors_to_bytes(sector_num
), filename1
,
1339 ret
= blk_pread(blk2
, sector_num
<< BDRV_SECTOR_BITS
, buf2
,
1340 nb_sectors
<< BDRV_SECTOR_BITS
);
1342 error_report("Error while reading offset %" PRId64
1343 " of %s: %s", sectors_to_bytes(sector_num
),
1344 filename2
, strerror(-ret
));
1348 ret
= compare_sectors(buf1
, buf2
, nb_sectors
, &pnum
);
1349 if (ret
|| pnum
!= nb_sectors
) {
1350 qprintf(quiet
, "Content mismatch at offset %" PRId64
"!\n",
1352 ret
? sector_num
: sector_num
+ pnum
));
1360 ret
= check_empty_sectors(blk1
, sector_num
, nb_sectors
,
1361 filename1
, buf1
, quiet
);
1363 ret
= check_empty_sectors(blk2
, sector_num
, nb_sectors
,
1364 filename2
, buf1
, quiet
);
1368 error_report("Error while reading offset %" PRId64
": %s",
1369 sectors_to_bytes(sector_num
), strerror(-ret
));
1375 sector_num
+= nb_sectors
;
1376 qemu_progress_print(((float) nb_sectors
/ progress_base
)*100, 100);
1379 if (total_sectors1
!= total_sectors2
) {
1380 BlockBackend
*blk_over
;
1381 int64_t total_sectors_over
;
1382 const char *filename_over
;
1384 qprintf(quiet
, "Warning: Image size mismatch!\n");
1385 if (total_sectors1
> total_sectors2
) {
1386 total_sectors_over
= total_sectors1
;
1388 filename_over
= filename1
;
1390 total_sectors_over
= total_sectors2
;
1392 filename_over
= filename2
;
1396 nb_sectors
= sectors_to_process(total_sectors_over
, sector_num
);
1397 if (nb_sectors
<= 0) {
1400 ret
= bdrv_is_allocated_above(blk_bs(blk_over
), NULL
, sector_num
,
1404 error_report("Sector allocation test failed for %s",
1411 ret
= check_empty_sectors(blk_over
, sector_num
, nb_sectors
,
1412 filename_over
, buf1
, quiet
);
1415 error_report("Error while reading offset %" PRId64
1416 " of %s: %s", sectors_to_bytes(sector_num
),
1417 filename_over
, strerror(-ret
));
1423 sector_num
+= nb_sectors
;
1424 qemu_progress_print(((float) nb_sectors
/ progress_base
)*100, 100);
1428 qprintf(quiet
, "Images are identical.\n");
1438 qemu_progress_end();
1443 enum ImgConvertBlockStatus
{
1449 typedef struct ImgConvertState
{
1451 int64_t *src_sectors
;
1452 int src_cur
, src_num
;
1453 int64_t src_cur_offset
;
1454 int64_t total_sectors
;
1455 int64_t allocated_sectors
;
1456 enum ImgConvertBlockStatus status
;
1457 int64_t sector_next_status
;
1458 BlockBackend
*target
;
1461 bool target_has_backing
;
1463 size_t cluster_sectors
;
1467 static void convert_select_part(ImgConvertState
*s
, int64_t sector_num
)
1469 assert(sector_num
>= s
->src_cur_offset
);
1470 while (sector_num
- s
->src_cur_offset
>= s
->src_sectors
[s
->src_cur
]) {
1471 s
->src_cur_offset
+= s
->src_sectors
[s
->src_cur
];
1473 assert(s
->src_cur
< s
->src_num
);
1477 static int convert_iteration_sectors(ImgConvertState
*s
, int64_t sector_num
)
1482 convert_select_part(s
, sector_num
);
1484 assert(s
->total_sectors
> sector_num
);
1485 n
= MIN(s
->total_sectors
- sector_num
, BDRV_REQUEST_MAX_SECTORS
);
1487 if (s
->sector_next_status
<= sector_num
) {
1488 BlockDriverState
*file
;
1489 ret
= bdrv_get_block_status(blk_bs(s
->src
[s
->src_cur
]),
1490 sector_num
- s
->src_cur_offset
,
1496 if (ret
& BDRV_BLOCK_ZERO
) {
1497 s
->status
= BLK_ZERO
;
1498 } else if (ret
& BDRV_BLOCK_DATA
) {
1499 s
->status
= BLK_DATA
;
1500 } else if (!s
->target_has_backing
) {
1501 /* Without a target backing file we must copy over the contents of
1502 * the backing file as well. */
1503 /* Check block status of the backing file chain to avoid
1504 * needlessly reading zeroes and limiting the iteration to the
1506 ret
= bdrv_get_block_status_above(blk_bs(s
->src
[s
->src_cur
]), NULL
,
1507 sector_num
- s
->src_cur_offset
,
1513 if (ret
& BDRV_BLOCK_ZERO
) {
1514 s
->status
= BLK_ZERO
;
1516 s
->status
= BLK_DATA
;
1519 s
->status
= BLK_BACKING_FILE
;
1522 s
->sector_next_status
= sector_num
+ n
;
1525 n
= MIN(n
, s
->sector_next_status
- sector_num
);
1526 if (s
->status
== BLK_DATA
) {
1527 n
= MIN(n
, s
->buf_sectors
);
1530 /* We need to write complete clusters for compressed images, so if an
1531 * unallocated area is shorter than that, we must consider the whole
1532 * cluster allocated. */
1533 if (s
->compressed
) {
1534 if (n
< s
->cluster_sectors
) {
1535 n
= MIN(s
->cluster_sectors
, s
->total_sectors
- sector_num
);
1536 s
->status
= BLK_DATA
;
1538 n
= QEMU_ALIGN_DOWN(n
, s
->cluster_sectors
);
1545 static int convert_read(ImgConvertState
*s
, int64_t sector_num
, int nb_sectors
,
1551 assert(nb_sectors
<= s
->buf_sectors
);
1552 while (nb_sectors
> 0) {
1556 /* In the case of compression with multiple source files, we can get a
1557 * nb_sectors that spreads into the next part. So we must be able to
1558 * read across multiple BDSes for one convert_read() call. */
1559 convert_select_part(s
, sector_num
);
1560 blk
= s
->src
[s
->src_cur
];
1561 bs_sectors
= s
->src_sectors
[s
->src_cur
];
1563 n
= MIN(nb_sectors
, bs_sectors
- (sector_num
- s
->src_cur_offset
));
1564 ret
= blk_pread(blk
,
1565 (sector_num
- s
->src_cur_offset
) << BDRV_SECTOR_BITS
,
1566 buf
, n
<< BDRV_SECTOR_BITS
);
1573 buf
+= n
* BDRV_SECTOR_SIZE
;
1579 static int convert_write(ImgConvertState
*s
, int64_t sector_num
, int nb_sectors
,
1584 while (nb_sectors
> 0) {
1587 switch (s
->status
) {
1588 case BLK_BACKING_FILE
:
1589 /* If we have a backing file, leave clusters unallocated that are
1590 * unallocated in the source image, so that the backing file is
1591 * visible at the respective offset. */
1592 assert(s
->target_has_backing
);
1596 /* We must always write compressed clusters as a whole, so don't
1597 * try to find zeroed parts in the buffer. We can only save the
1598 * write if the buffer is completely zeroed and we're allowed to
1599 * keep the target sparse. */
1600 if (s
->compressed
) {
1601 if (s
->has_zero_init
&& s
->min_sparse
&&
1602 buffer_is_zero(buf
, n
* BDRV_SECTOR_SIZE
))
1604 assert(!s
->target_has_backing
);
1608 ret
= blk_pwrite_compressed(s
->target
,
1609 sector_num
<< BDRV_SECTOR_BITS
,
1610 buf
, n
<< BDRV_SECTOR_BITS
);
1617 /* If there is real non-zero data or we're told to keep the target
1618 * fully allocated (-S 0), we must write it. Otherwise we can treat
1619 * it as zero sectors. */
1620 if (!s
->min_sparse
||
1621 is_allocated_sectors_min(buf
, n
, &n
, s
->min_sparse
))
1623 ret
= blk_pwrite(s
->target
, sector_num
<< BDRV_SECTOR_BITS
,
1624 buf
, n
<< BDRV_SECTOR_BITS
, 0);
1633 if (s
->has_zero_init
) {
1636 ret
= blk_pwrite_zeroes(s
->target
, sector_num
<< BDRV_SECTOR_BITS
,
1637 n
<< BDRV_SECTOR_BITS
, 0);
1646 buf
+= n
* BDRV_SECTOR_SIZE
;
1652 static int convert_do_copy(ImgConvertState
*s
)
1654 uint8_t *buf
= NULL
;
1655 int64_t sector_num
, allocated_done
;
1659 /* Check whether we have zero initialisation or can get it efficiently */
1660 s
->has_zero_init
= s
->min_sparse
&& !s
->target_has_backing
1661 ? bdrv_has_zero_init(blk_bs(s
->target
))
1664 if (!s
->has_zero_init
&& !s
->target_has_backing
&&
1665 bdrv_can_write_zeroes_with_unmap(blk_bs(s
->target
)))
1667 ret
= blk_make_zero(s
->target
, BDRV_REQ_MAY_UNMAP
);
1669 s
->has_zero_init
= true;
1673 /* Allocate buffer for copied data. For compressed images, only one cluster
1674 * can be copied at a time. */
1675 if (s
->compressed
) {
1676 if (s
->cluster_sectors
<= 0 || s
->cluster_sectors
> s
->buf_sectors
) {
1677 error_report("invalid cluster size");
1681 s
->buf_sectors
= s
->cluster_sectors
;
1683 buf
= blk_blockalign(s
->target
, s
->buf_sectors
* BDRV_SECTOR_SIZE
);
1685 /* Calculate allocated sectors for progress */
1686 s
->allocated_sectors
= 0;
1688 while (sector_num
< s
->total_sectors
) {
1689 n
= convert_iteration_sectors(s
, sector_num
);
1694 if (s
->status
== BLK_DATA
|| (!s
->min_sparse
&& s
->status
== BLK_ZERO
))
1696 s
->allocated_sectors
+= n
;
1703 s
->src_cur_offset
= 0;
1704 s
->sector_next_status
= 0;
1709 while (sector_num
< s
->total_sectors
) {
1710 n
= convert_iteration_sectors(s
, sector_num
);
1715 if (s
->status
== BLK_DATA
|| (!s
->min_sparse
&& s
->status
== BLK_ZERO
))
1717 allocated_done
+= n
;
1718 qemu_progress_print(100.0 * allocated_done
/ s
->allocated_sectors
,
1722 if (s
->status
== BLK_DATA
) {
1723 ret
= convert_read(s
, sector_num
, n
, buf
);
1725 error_report("error while reading sector %" PRId64
1726 ": %s", sector_num
, strerror(-ret
));
1729 } else if (!s
->min_sparse
&& s
->status
== BLK_ZERO
) {
1730 n
= MIN(n
, s
->buf_sectors
);
1731 memset(buf
, 0, n
* BDRV_SECTOR_SIZE
);
1732 s
->status
= BLK_DATA
;
1735 ret
= convert_write(s
, sector_num
, n
, buf
);
1737 error_report("error while writing sector %" PRId64
1738 ": %s", sector_num
, strerror(-ret
));
1745 if (s
->compressed
) {
1746 /* signal EOF to align */
1747 ret
= blk_pwrite_compressed(s
->target
, 0, NULL
, 0);
1759 static int img_convert(int argc
, char **argv
)
1761 int c
, bs_n
, bs_i
, compress
, cluster_sectors
, skip_create
;
1763 int progress
= 0, flags
, src_flags
;
1764 bool writethrough
, src_writethrough
;
1765 const char *fmt
, *out_fmt
, *cache
, *src_cache
, *out_baseimg
, *out_filename
;
1766 BlockDriver
*drv
, *proto_drv
;
1767 BlockBackend
**blk
= NULL
, *out_blk
= NULL
;
1768 BlockDriverState
**bs
= NULL
, *out_bs
= NULL
;
1769 int64_t total_sectors
;
1770 int64_t *bs_sectors
= NULL
;
1771 size_t bufsectors
= IO_BUF_SIZE
/ BDRV_SECTOR_SIZE
;
1772 BlockDriverInfo bdi
;
1773 QemuOpts
*opts
= NULL
;
1774 QemuOptsList
*create_opts
= NULL
;
1775 const char *out_baseimg_param
;
1776 char *options
= NULL
;
1777 const char *snapshot_name
= NULL
;
1778 int min_sparse
= 8; /* Need at least 4k of zeros for sparse detection */
1780 Error
*local_err
= NULL
;
1781 QemuOpts
*sn_opts
= NULL
;
1782 ImgConvertState state
;
1783 bool image_opts
= false;
1788 src_cache
= BDRV_DEFAULT_CACHE
;
1793 static const struct option long_options
[] = {
1794 {"help", no_argument
, 0, 'h'},
1795 {"object", required_argument
, 0, OPTION_OBJECT
},
1796 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
1799 c
= getopt_long(argc
, argv
, "hf:O:B:ce6o:s:l:S:pt:T:qn",
1800 long_options
, NULL
);
1816 out_baseimg
= optarg
;
1822 error_report("option -e is deprecated, please use \'-o "
1823 "encryption\' instead!");
1827 error_report("option -6 is deprecated, please use \'-o "
1828 "compat6\' instead!");
1832 if (!is_valid_option_list(optarg
)) {
1833 error_report("Invalid option list: %s", optarg
);
1838 options
= g_strdup(optarg
);
1840 char *old_options
= options
;
1841 options
= g_strdup_printf("%s,%s", options
, optarg
);
1842 g_free(old_options
);
1846 snapshot_name
= optarg
;
1849 if (strstart(optarg
, SNAPSHOT_OPT_BASE
, NULL
)) {
1850 sn_opts
= qemu_opts_parse_noisily(&internal_snapshot_opts
,
1853 error_report("Failed in parsing snapshot param '%s'",
1859 snapshot_name
= optarg
;
1866 sval
= qemu_strtosz_suffix(optarg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
1867 if (sval
< 0 || *end
) {
1868 error_report("Invalid minimum zero buffer size for sparse output specified");
1873 min_sparse
= sval
/ BDRV_SECTOR_SIZE
;
1892 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
1898 case OPTION_IMAGE_OPTS
:
1904 if (qemu_opts_foreach(&qemu_object_opts
,
1905 user_creatable_add_opts_foreach
,
1910 /* Initialize before goto out */
1914 qemu_progress_init(progress
, 1.0);
1916 bs_n
= argc
- optind
- 1;
1917 out_filename
= bs_n
>= 1 ? argv
[argc
- 1] : NULL
;
1919 if (options
&& has_help_option(options
)) {
1920 ret
= print_block_option_help(out_filename
, out_fmt
);
1925 error_exit("Must specify image file name");
1929 if (bs_n
> 1 && out_baseimg
) {
1930 error_report("-B makes no sense when concatenating multiple input "
1937 ret
= bdrv_parse_cache_mode(src_cache
, &src_flags
, &src_writethrough
);
1939 error_report("Invalid source cache option: %s", src_cache
);
1943 qemu_progress_print(0, 100);
1945 blk
= g_new0(BlockBackend
*, bs_n
);
1946 bs
= g_new0(BlockDriverState
*, bs_n
);
1947 bs_sectors
= g_new(int64_t, bs_n
);
1950 for (bs_i
= 0; bs_i
< bs_n
; bs_i
++) {
1951 blk
[bs_i
] = img_open(image_opts
, argv
[optind
+ bs_i
],
1952 fmt
, src_flags
, src_writethrough
, quiet
);
1957 bs
[bs_i
] = blk_bs(blk
[bs_i
]);
1958 bs_sectors
[bs_i
] = blk_nb_sectors(blk
[bs_i
]);
1959 if (bs_sectors
[bs_i
] < 0) {
1960 error_report("Could not get size of %s: %s",
1961 argv
[optind
+ bs_i
], strerror(-bs_sectors
[bs_i
]));
1965 total_sectors
+= bs_sectors
[bs_i
];
1969 ret
= bdrv_snapshot_load_tmp(bs
[0],
1970 qemu_opt_get(sn_opts
, SNAPSHOT_OPT_ID
),
1971 qemu_opt_get(sn_opts
, SNAPSHOT_OPT_NAME
),
1973 } else if (snapshot_name
!= NULL
) {
1975 error_report("No support for concatenating multiple snapshot");
1980 bdrv_snapshot_load_tmp_by_id_or_name(bs
[0], snapshot_name
, &local_err
);
1983 error_reportf_err(local_err
, "Failed to load snapshot: ");
1988 /* Find driver and parse its options */
1989 drv
= bdrv_find_format(out_fmt
);
1991 error_report("Unknown file format '%s'", out_fmt
);
1996 proto_drv
= bdrv_find_protocol(out_filename
, true, &local_err
);
1998 error_report_err(local_err
);
2004 if (!drv
->create_opts
) {
2005 error_report("Format driver '%s' does not support image creation",
2011 if (!proto_drv
->create_opts
) {
2012 error_report("Protocol driver '%s' does not support image creation",
2013 proto_drv
->format_name
);
2018 create_opts
= qemu_opts_append(create_opts
, drv
->create_opts
);
2019 create_opts
= qemu_opts_append(create_opts
, proto_drv
->create_opts
);
2021 opts
= qemu_opts_create(create_opts
, NULL
, 0, &error_abort
);
2023 qemu_opts_do_parse(opts
, options
, NULL
, &local_err
);
2025 error_report_err(local_err
);
2031 qemu_opt_set_number(opts
, BLOCK_OPT_SIZE
, total_sectors
* 512,
2033 ret
= add_old_style_options(out_fmt
, opts
, out_baseimg
, NULL
);
2039 /* Get backing file name if -o backing_file was used */
2040 out_baseimg_param
= qemu_opt_get(opts
, BLOCK_OPT_BACKING_FILE
);
2041 if (out_baseimg_param
) {
2042 out_baseimg
= out_baseimg_param
;
2045 /* Check if compression is supported */
2048 qemu_opt_get_bool(opts
, BLOCK_OPT_ENCRYPT
, false);
2049 const char *preallocation
=
2050 qemu_opt_get(opts
, BLOCK_OPT_PREALLOC
);
2052 if (!drv
->bdrv_co_pwritev_compressed
) {
2053 error_report("Compression not supported for this file format");
2059 error_report("Compression and encryption not supported at "
2066 && strcmp(preallocation
, "off"))
2068 error_report("Compression and preallocation not supported at "
2076 /* Create the new image */
2077 ret
= bdrv_create(drv
, out_filename
, opts
, &local_err
);
2079 error_reportf_err(local_err
, "%s: error while converting %s: ",
2080 out_filename
, out_fmt
);
2085 flags
= min_sparse
? (BDRV_O_RDWR
| BDRV_O_UNMAP
) : BDRV_O_RDWR
;
2086 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
2088 error_report("Invalid cache option: %s", cache
);
2092 /* XXX we should allow --image-opts to trigger use of
2093 * img_open() here, but then we have trouble with
2094 * the bdrv_create() call which takes different params.
2095 * Not critical right now, so fix can wait...
2097 out_blk
= img_open_file(out_filename
, out_fmt
, flags
, writethrough
, quiet
);
2102 out_bs
= blk_bs(out_blk
);
2104 /* increase bufsectors from the default 4096 (2M) if opt_transfer
2105 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
2107 bufsectors
= MIN(32768,
2109 MAX(out_bs
->bl
.opt_transfer
>> BDRV_SECTOR_BITS
,
2110 out_bs
->bl
.pdiscard_alignment
>>
2111 BDRV_SECTOR_BITS
)));
2114 int64_t output_sectors
= blk_nb_sectors(out_blk
);
2115 if (output_sectors
< 0) {
2116 error_report("unable to get output image length: %s",
2117 strerror(-output_sectors
));
2120 } else if (output_sectors
< total_sectors
) {
2121 error_report("output file is smaller than input file");
2127 cluster_sectors
= 0;
2128 ret
= bdrv_get_info(out_bs
, &bdi
);
2131 error_report("could not get block driver info");
2135 compress
= compress
|| bdi
.needs_compressed_writes
;
2136 cluster_sectors
= bdi
.cluster_size
/ BDRV_SECTOR_SIZE
;
2139 state
= (ImgConvertState
) {
2141 .src_sectors
= bs_sectors
,
2143 .total_sectors
= total_sectors
,
2145 .compressed
= compress
,
2146 .target_has_backing
= (bool) out_baseimg
,
2147 .min_sparse
= min_sparse
,
2148 .cluster_sectors
= cluster_sectors
,
2149 .buf_sectors
= bufsectors
,
2151 ret
= convert_do_copy(&state
);
2155 qemu_progress_print(100, 0);
2157 qemu_progress_end();
2158 qemu_opts_del(opts
);
2159 qemu_opts_free(create_opts
);
2160 qemu_opts_del(sn_opts
);
2164 for (bs_i
= 0; bs_i
< bs_n
; bs_i
++) {
2165 blk_unref(blk
[bs_i
]);
2180 static void dump_snapshots(BlockDriverState
*bs
)
2182 QEMUSnapshotInfo
*sn_tab
, *sn
;
2185 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2188 printf("Snapshot list:\n");
2189 bdrv_snapshot_dump(fprintf
, stdout
, NULL
);
2191 for(i
= 0; i
< nb_sns
; i
++) {
2193 bdrv_snapshot_dump(fprintf
, stdout
, sn
);
2199 static void dump_json_image_info_list(ImageInfoList
*list
)
2203 Visitor
*v
= qobject_output_visitor_new(&obj
);
2205 visit_type_ImageInfoList(v
, NULL
, &list
, &error_abort
);
2206 visit_complete(v
, &obj
);
2207 str
= qobject_to_json_pretty(obj
);
2208 assert(str
!= NULL
);
2209 printf("%s\n", qstring_get_str(str
));
2210 qobject_decref(obj
);
2215 static void dump_json_image_info(ImageInfo
*info
)
2219 Visitor
*v
= qobject_output_visitor_new(&obj
);
2221 visit_type_ImageInfo(v
, NULL
, &info
, &error_abort
);
2222 visit_complete(v
, &obj
);
2223 str
= qobject_to_json_pretty(obj
);
2224 assert(str
!= NULL
);
2225 printf("%s\n", qstring_get_str(str
));
2226 qobject_decref(obj
);
2231 static void dump_human_image_info_list(ImageInfoList
*list
)
2233 ImageInfoList
*elem
;
2236 for (elem
= list
; elem
; elem
= elem
->next
) {
2242 bdrv_image_info_dump(fprintf
, stdout
, elem
->value
);
2246 static gboolean
str_equal_func(gconstpointer a
, gconstpointer b
)
2248 return strcmp(a
, b
) == 0;
2252 * Open an image file chain and return an ImageInfoList
2254 * @filename: topmost image filename
2255 * @fmt: topmost image format (may be NULL to autodetect)
2256 * @chain: true - enumerate entire backing file chain
2257 * false - only topmost image file
2259 * Returns a list of ImageInfo objects or NULL if there was an error opening an
2260 * image file. If there was an error a message will have been printed to
2263 static ImageInfoList
*collect_image_info_list(bool image_opts
,
2264 const char *filename
,
2268 ImageInfoList
*head
= NULL
;
2269 ImageInfoList
**last
= &head
;
2270 GHashTable
*filenames
;
2273 filenames
= g_hash_table_new_full(g_str_hash
, str_equal_func
, NULL
, NULL
);
2277 BlockDriverState
*bs
;
2279 ImageInfoList
*elem
;
2281 if (g_hash_table_lookup_extended(filenames
, filename
, NULL
, NULL
)) {
2282 error_report("Backing file '%s' creates an infinite loop.",
2286 g_hash_table_insert(filenames
, (gpointer
)filename
, NULL
);
2288 blk
= img_open(image_opts
, filename
, fmt
,
2289 BDRV_O_NO_BACKING
| BDRV_O_NO_IO
, false, false);
2295 bdrv_query_image_info(bs
, &info
, &err
);
2297 error_report_err(err
);
2302 elem
= g_new0(ImageInfoList
, 1);
2309 filename
= fmt
= NULL
;
2311 if (info
->has_full_backing_filename
) {
2312 filename
= info
->full_backing_filename
;
2313 } else if (info
->has_backing_filename
) {
2314 error_report("Could not determine absolute backing filename,"
2315 " but backing filename '%s' present",
2316 info
->backing_filename
);
2319 if (info
->has_backing_filename_format
) {
2320 fmt
= info
->backing_filename_format
;
2324 g_hash_table_destroy(filenames
);
2328 qapi_free_ImageInfoList(head
);
2329 g_hash_table_destroy(filenames
);
2333 static int img_info(int argc
, char **argv
)
2336 OutputFormat output_format
= OFORMAT_HUMAN
;
2338 const char *filename
, *fmt
, *output
;
2339 ImageInfoList
*list
;
2340 bool image_opts
= false;
2345 int option_index
= 0;
2346 static const struct option long_options
[] = {
2347 {"help", no_argument
, 0, 'h'},
2348 {"format", required_argument
, 0, 'f'},
2349 {"output", required_argument
, 0, OPTION_OUTPUT
},
2350 {"backing-chain", no_argument
, 0, OPTION_BACKING_CHAIN
},
2351 {"object", required_argument
, 0, OPTION_OBJECT
},
2352 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
2355 c
= getopt_long(argc
, argv
, "f:h",
2356 long_options
, &option_index
);
2371 case OPTION_BACKING_CHAIN
:
2374 case OPTION_OBJECT
: {
2376 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
2382 case OPTION_IMAGE_OPTS
:
2387 if (optind
!= argc
- 1) {
2388 error_exit("Expecting one image file name");
2390 filename
= argv
[optind
++];
2392 if (output
&& !strcmp(output
, "json")) {
2393 output_format
= OFORMAT_JSON
;
2394 } else if (output
&& !strcmp(output
, "human")) {
2395 output_format
= OFORMAT_HUMAN
;
2396 } else if (output
) {
2397 error_report("--output must be used with human or json as argument.");
2401 if (qemu_opts_foreach(&qemu_object_opts
,
2402 user_creatable_add_opts_foreach
,
2407 list
= collect_image_info_list(image_opts
, filename
, fmt
, chain
);
2412 switch (output_format
) {
2414 dump_human_image_info_list(list
);
2418 dump_json_image_info_list(list
);
2420 dump_json_image_info(list
->value
);
2425 qapi_free_ImageInfoList(list
);
2429 static void dump_map_entry(OutputFormat output_format
, MapEntry
*e
,
2432 switch (output_format
) {
2434 if (e
->data
&& !e
->has_offset
) {
2435 error_report("File contains external, encrypted or compressed clusters.");
2438 if (e
->data
&& !e
->zero
) {
2439 printf("%#-16"PRIx64
"%#-16"PRIx64
"%#-16"PRIx64
"%s\n",
2440 e
->start
, e
->length
,
2441 e
->has_offset
? e
->offset
: 0,
2442 e
->has_filename
? e
->filename
: "");
2444 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2445 * Modify the flags here to allow more coalescing.
2447 if (next
&& (!next
->data
|| next
->zero
)) {
2453 printf("%s{ \"start\": %"PRId64
", \"length\": %"PRId64
","
2454 " \"depth\": %"PRId64
", \"zero\": %s, \"data\": %s",
2455 (e
->start
== 0 ? "[" : ",\n"),
2456 e
->start
, e
->length
, e
->depth
,
2457 e
->zero
? "true" : "false",
2458 e
->data
? "true" : "false");
2459 if (e
->has_offset
) {
2460 printf(", \"offset\": %"PRId64
"", e
->offset
);
2471 static int get_block_status(BlockDriverState
*bs
, int64_t sector_num
,
2472 int nb_sectors
, MapEntry
*e
)
2476 BlockDriverState
*file
;
2479 /* As an optimization, we could cache the current range of unallocated
2480 * clusters in each file of the chain, and avoid querying the same
2486 ret
= bdrv_get_block_status(bs
, sector_num
, nb_sectors
, &nb_sectors
,
2492 if (ret
& (BDRV_BLOCK_ZERO
|BDRV_BLOCK_DATA
)) {
2495 bs
= backing_bs(bs
);
2504 has_offset
= !!(ret
& BDRV_BLOCK_OFFSET_VALID
);
2507 .start
= sector_num
* BDRV_SECTOR_SIZE
,
2508 .length
= nb_sectors
* BDRV_SECTOR_SIZE
,
2509 .data
= !!(ret
& BDRV_BLOCK_DATA
),
2510 .zero
= !!(ret
& BDRV_BLOCK_ZERO
),
2511 .offset
= ret
& BDRV_BLOCK_OFFSET_MASK
,
2512 .has_offset
= has_offset
,
2514 .has_filename
= file
&& has_offset
,
2515 .filename
= file
&& has_offset
? file
->filename
: NULL
,
2521 static inline bool entry_mergeable(const MapEntry
*curr
, const MapEntry
*next
)
2523 if (curr
->length
== 0) {
2526 if (curr
->zero
!= next
->zero
||
2527 curr
->data
!= next
->data
||
2528 curr
->depth
!= next
->depth
||
2529 curr
->has_filename
!= next
->has_filename
||
2530 curr
->has_offset
!= next
->has_offset
) {
2533 if (curr
->has_filename
&& strcmp(curr
->filename
, next
->filename
)) {
2536 if (curr
->has_offset
&& curr
->offset
+ curr
->length
!= next
->offset
) {
2542 static int img_map(int argc
, char **argv
)
2545 OutputFormat output_format
= OFORMAT_HUMAN
;
2547 BlockDriverState
*bs
;
2548 const char *filename
, *fmt
, *output
;
2550 MapEntry curr
= { .length
= 0 }, next
;
2552 bool image_opts
= false;
2557 int option_index
= 0;
2558 static const struct option long_options
[] = {
2559 {"help", no_argument
, 0, 'h'},
2560 {"format", required_argument
, 0, 'f'},
2561 {"output", required_argument
, 0, OPTION_OUTPUT
},
2562 {"object", required_argument
, 0, OPTION_OBJECT
},
2563 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
2566 c
= getopt_long(argc
, argv
, "f:h",
2567 long_options
, &option_index
);
2582 case OPTION_OBJECT
: {
2584 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
2590 case OPTION_IMAGE_OPTS
:
2595 if (optind
!= argc
- 1) {
2596 error_exit("Expecting one image file name");
2598 filename
= argv
[optind
];
2600 if (output
&& !strcmp(output
, "json")) {
2601 output_format
= OFORMAT_JSON
;
2602 } else if (output
&& !strcmp(output
, "human")) {
2603 output_format
= OFORMAT_HUMAN
;
2604 } else if (output
) {
2605 error_report("--output must be used with human or json as argument.");
2609 if (qemu_opts_foreach(&qemu_object_opts
,
2610 user_creatable_add_opts_foreach
,
2615 blk
= img_open(image_opts
, filename
, fmt
, 0, false, false);
2621 if (output_format
== OFORMAT_HUMAN
) {
2622 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2625 length
= blk_getlength(blk
);
2626 while (curr
.start
+ curr
.length
< length
) {
2627 int64_t nsectors_left
;
2631 sector_num
= (curr
.start
+ curr
.length
) >> BDRV_SECTOR_BITS
;
2633 /* Probe up to 1 GiB at a time. */
2634 nsectors_left
= DIV_ROUND_UP(length
, BDRV_SECTOR_SIZE
) - sector_num
;
2635 n
= MIN(1 << (30 - BDRV_SECTOR_BITS
), nsectors_left
);
2636 ret
= get_block_status(bs
, sector_num
, n
, &next
);
2639 error_report("Could not read file metadata: %s", strerror(-ret
));
2643 if (entry_mergeable(&curr
, &next
)) {
2644 curr
.length
+= next
.length
;
2648 if (curr
.length
> 0) {
2649 dump_map_entry(output_format
, &curr
, &next
);
2654 dump_map_entry(output_format
, &curr
, NULL
);
2661 #define SNAPSHOT_LIST 1
2662 #define SNAPSHOT_CREATE 2
2663 #define SNAPSHOT_APPLY 3
2664 #define SNAPSHOT_DELETE 4
2666 static int img_snapshot(int argc
, char **argv
)
2669 BlockDriverState
*bs
;
2670 QEMUSnapshotInfo sn
;
2671 char *filename
, *snapshot_name
= NULL
;
2672 int c
, ret
= 0, bdrv_oflags
;
2677 bool image_opts
= false;
2679 bdrv_oflags
= BDRV_O_RDWR
;
2680 /* Parse commandline parameters */
2682 static const struct option long_options
[] = {
2683 {"help", no_argument
, 0, 'h'},
2684 {"object", required_argument
, 0, OPTION_OBJECT
},
2685 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
2688 c
= getopt_long(argc
, argv
, "la:c:d:hq",
2689 long_options
, NULL
);
2700 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2703 action
= SNAPSHOT_LIST
;
2704 bdrv_oflags
&= ~BDRV_O_RDWR
; /* no need for RW */
2708 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2711 action
= SNAPSHOT_APPLY
;
2712 snapshot_name
= optarg
;
2716 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2719 action
= SNAPSHOT_CREATE
;
2720 snapshot_name
= optarg
;
2724 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
2727 action
= SNAPSHOT_DELETE
;
2728 snapshot_name
= optarg
;
2733 case OPTION_OBJECT
: {
2735 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
2741 case OPTION_IMAGE_OPTS
:
2747 if (optind
!= argc
- 1) {
2748 error_exit("Expecting one image file name");
2750 filename
= argv
[optind
++];
2752 if (qemu_opts_foreach(&qemu_object_opts
,
2753 user_creatable_add_opts_foreach
,
2758 /* Open the image */
2759 blk
= img_open(image_opts
, filename
, NULL
, bdrv_oflags
, false, quiet
);
2765 /* Perform the requested action */
2771 case SNAPSHOT_CREATE
:
2772 memset(&sn
, 0, sizeof(sn
));
2773 pstrcpy(sn
.name
, sizeof(sn
.name
), snapshot_name
);
2775 qemu_gettimeofday(&tv
);
2776 sn
.date_sec
= tv
.tv_sec
;
2777 sn
.date_nsec
= tv
.tv_usec
* 1000;
2779 ret
= bdrv_snapshot_create(bs
, &sn
);
2781 error_report("Could not create snapshot '%s': %d (%s)",
2782 snapshot_name
, ret
, strerror(-ret
));
2786 case SNAPSHOT_APPLY
:
2787 ret
= bdrv_snapshot_goto(bs
, snapshot_name
);
2789 error_report("Could not apply snapshot '%s': %d (%s)",
2790 snapshot_name
, ret
, strerror(-ret
));
2794 case SNAPSHOT_DELETE
:
2795 bdrv_snapshot_delete_by_id_or_name(bs
, snapshot_name
, &err
);
2797 error_reportf_err(err
, "Could not delete snapshot '%s': ",
2812 static int img_rebase(int argc
, char **argv
)
2814 BlockBackend
*blk
= NULL
, *blk_old_backing
= NULL
, *blk_new_backing
= NULL
;
2815 uint8_t *buf_old
= NULL
;
2816 uint8_t *buf_new
= NULL
;
2817 BlockDriverState
*bs
= NULL
;
2819 const char *fmt
, *cache
, *src_cache
, *out_basefmt
, *out_baseimg
;
2820 int c
, flags
, src_flags
, ret
;
2821 bool writethrough
, src_writethrough
;
2825 Error
*local_err
= NULL
;
2826 bool image_opts
= false;
2828 /* Parse commandline parameters */
2830 cache
= BDRV_DEFAULT_CACHE
;
2831 src_cache
= BDRV_DEFAULT_CACHE
;
2835 static const struct option long_options
[] = {
2836 {"help", no_argument
, 0, 'h'},
2837 {"object", required_argument
, 0, OPTION_OBJECT
},
2838 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
2841 c
= getopt_long(argc
, argv
, "hf:F:b:upt:T:q",
2842 long_options
, NULL
);
2855 out_basefmt
= optarg
;
2858 out_baseimg
= optarg
;
2875 case OPTION_OBJECT
: {
2877 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
2883 case OPTION_IMAGE_OPTS
:
2893 if (optind
!= argc
- 1) {
2894 error_exit("Expecting one image file name");
2896 if (!unsafe
&& !out_baseimg
) {
2897 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
2899 filename
= argv
[optind
++];
2901 if (qemu_opts_foreach(&qemu_object_opts
,
2902 user_creatable_add_opts_foreach
,
2907 qemu_progress_init(progress
, 2.0);
2908 qemu_progress_print(0, 100);
2910 flags
= BDRV_O_RDWR
| (unsafe
? BDRV_O_NO_BACKING
: 0);
2911 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
2913 error_report("Invalid cache option: %s", cache
);
2918 ret
= bdrv_parse_cache_mode(src_cache
, &src_flags
, &src_writethrough
);
2920 error_report("Invalid source cache option: %s", src_cache
);
2924 /* The source files are opened read-only, don't care about WCE */
2925 assert((src_flags
& BDRV_O_RDWR
) == 0);
2926 (void) src_writethrough
;
2931 * Ignore the old backing file for unsafe rebase in case we want to correct
2932 * the reference to a renamed or moved backing file.
2934 blk
= img_open(image_opts
, filename
, fmt
, flags
, writethrough
, quiet
);
2941 if (out_basefmt
!= NULL
) {
2942 if (bdrv_find_format(out_basefmt
) == NULL
) {
2943 error_report("Invalid format name: '%s'", out_basefmt
);
2949 /* For safe rebasing we need to compare old and new backing file */
2951 char backing_name
[PATH_MAX
];
2952 QDict
*options
= NULL
;
2954 if (bs
->backing_format
[0] != '\0') {
2955 options
= qdict_new();
2956 qdict_put(options
, "driver", qstring_from_str(bs
->backing_format
));
2959 bdrv_get_backing_filename(bs
, backing_name
, sizeof(backing_name
));
2960 blk_old_backing
= blk_new_open(backing_name
, NULL
,
2961 options
, src_flags
, &local_err
);
2962 if (!blk_old_backing
) {
2963 error_reportf_err(local_err
,
2964 "Could not open old backing file '%s': ",
2970 if (out_baseimg
[0]) {
2972 options
= qdict_new();
2973 qdict_put(options
, "driver", qstring_from_str(out_basefmt
));
2978 blk_new_backing
= blk_new_open(out_baseimg
, NULL
,
2979 options
, src_flags
, &local_err
);
2980 if (!blk_new_backing
) {
2981 error_reportf_err(local_err
,
2982 "Could not open new backing file '%s': ",
2991 * Check each unallocated cluster in the COW file. If it is unallocated,
2992 * accesses go to the backing file. We must therefore compare this cluster
2993 * in the old and new backing file, and if they differ we need to copy it
2994 * from the old backing file into the COW file.
2996 * If qemu-img crashes during this step, no harm is done. The content of
2997 * the image is the same as the original one at any time.
3000 int64_t num_sectors
;
3001 int64_t old_backing_num_sectors
;
3002 int64_t new_backing_num_sectors
= 0;
3005 float local_progress
= 0;
3007 buf_old
= blk_blockalign(blk
, IO_BUF_SIZE
);
3008 buf_new
= blk_blockalign(blk
, IO_BUF_SIZE
);
3010 num_sectors
= blk_nb_sectors(blk
);
3011 if (num_sectors
< 0) {
3012 error_report("Could not get size of '%s': %s",
3013 filename
, strerror(-num_sectors
));
3017 old_backing_num_sectors
= blk_nb_sectors(blk_old_backing
);
3018 if (old_backing_num_sectors
< 0) {
3019 char backing_name
[PATH_MAX
];
3021 bdrv_get_backing_filename(bs
, backing_name
, sizeof(backing_name
));
3022 error_report("Could not get size of '%s': %s",
3023 backing_name
, strerror(-old_backing_num_sectors
));
3027 if (blk_new_backing
) {
3028 new_backing_num_sectors
= blk_nb_sectors(blk_new_backing
);
3029 if (new_backing_num_sectors
< 0) {
3030 error_report("Could not get size of '%s': %s",
3031 out_baseimg
, strerror(-new_backing_num_sectors
));
3037 if (num_sectors
!= 0) {
3038 local_progress
= (float)100 /
3039 (num_sectors
/ MIN(num_sectors
, IO_BUF_SIZE
/ 512));
3042 for (sector
= 0; sector
< num_sectors
; sector
+= n
) {
3044 /* How many sectors can we handle with the next read? */
3045 if (sector
+ (IO_BUF_SIZE
/ 512) <= num_sectors
) {
3046 n
= (IO_BUF_SIZE
/ 512);
3048 n
= num_sectors
- sector
;
3051 /* If the cluster is allocated, we don't need to take action */
3052 ret
= bdrv_is_allocated(bs
, sector
, n
, &n
);
3054 error_report("error while reading image metadata: %s",
3063 * Read old and new backing file and take into consideration that
3064 * backing files may be smaller than the COW image.
3066 if (sector
>= old_backing_num_sectors
) {
3067 memset(buf_old
, 0, n
* BDRV_SECTOR_SIZE
);
3069 if (sector
+ n
> old_backing_num_sectors
) {
3070 n
= old_backing_num_sectors
- sector
;
3073 ret
= blk_pread(blk_old_backing
, sector
<< BDRV_SECTOR_BITS
,
3074 buf_old
, n
<< BDRV_SECTOR_BITS
);
3076 error_report("error while reading from old backing file");
3081 if (sector
>= new_backing_num_sectors
|| !blk_new_backing
) {
3082 memset(buf_new
, 0, n
* BDRV_SECTOR_SIZE
);
3084 if (sector
+ n
> new_backing_num_sectors
) {
3085 n
= new_backing_num_sectors
- sector
;
3088 ret
= blk_pread(blk_new_backing
, sector
<< BDRV_SECTOR_BITS
,
3089 buf_new
, n
<< BDRV_SECTOR_BITS
);
3091 error_report("error while reading from new backing file");
3096 /* If they differ, we need to write to the COW file */
3097 uint64_t written
= 0;
3099 while (written
< n
) {
3102 if (compare_sectors(buf_old
+ written
* 512,
3103 buf_new
+ written
* 512, n
- written
, &pnum
))
3105 ret
= blk_pwrite(blk
,
3106 (sector
+ written
) << BDRV_SECTOR_BITS
,
3107 buf_old
+ written
* 512,
3108 pnum
<< BDRV_SECTOR_BITS
, 0);
3110 error_report("Error while writing to COW image: %s",
3118 qemu_progress_print(local_progress
, 100);
3123 * Change the backing file. All clusters that are different from the old
3124 * backing file are overwritten in the COW file now, so the visible content
3125 * doesn't change when we switch the backing file.
3127 if (out_baseimg
&& *out_baseimg
) {
3128 ret
= bdrv_change_backing_file(bs
, out_baseimg
, out_basefmt
);
3130 ret
= bdrv_change_backing_file(bs
, NULL
, NULL
);
3133 if (ret
== -ENOSPC
) {
3134 error_report("Could not change the backing file to '%s': No "
3135 "space left in the file header", out_baseimg
);
3136 } else if (ret
< 0) {
3137 error_report("Could not change the backing file to '%s': %s",
3138 out_baseimg
, strerror(-ret
));
3141 qemu_progress_print(100, 0);
3143 * TODO At this point it is possible to check if any clusters that are
3144 * allocated in the COW file are the same in the backing file. If so, they
3145 * could be dropped from the COW file. Don't do this before switching the
3146 * backing file, in case of a crash this would lead to corruption.
3149 qemu_progress_end();
3152 blk_unref(blk_old_backing
);
3153 blk_unref(blk_new_backing
);
3155 qemu_vfree(buf_old
);
3156 qemu_vfree(buf_new
);
3165 static int img_resize(int argc
, char **argv
)
3168 int c
, ret
, relative
;
3169 const char *filename
, *fmt
, *size
;
3170 int64_t n
, total_size
;
3172 BlockBackend
*blk
= NULL
;
3175 static QemuOptsList resize_options
= {
3176 .name
= "resize_options",
3177 .head
= QTAILQ_HEAD_INITIALIZER(resize_options
.head
),
3180 .name
= BLOCK_OPT_SIZE
,
3181 .type
= QEMU_OPT_SIZE
,
3182 .help
= "Virtual disk size"
3188 bool image_opts
= false;
3190 /* Remove size from argv manually so that negative numbers are not treated
3191 * as options by getopt. */
3193 error_exit("Not enough arguments");
3197 size
= argv
[--argc
];
3199 /* Parse getopt arguments */
3202 static const struct option long_options
[] = {
3203 {"help", no_argument
, 0, 'h'},
3204 {"object", required_argument
, 0, OPTION_OBJECT
},
3205 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
3208 c
= getopt_long(argc
, argv
, "f:hq",
3209 long_options
, NULL
);
3224 case OPTION_OBJECT
: {
3226 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
3232 case OPTION_IMAGE_OPTS
:
3237 if (optind
!= argc
- 1) {
3238 error_exit("Expecting one image file name");
3240 filename
= argv
[optind
++];
3242 if (qemu_opts_foreach(&qemu_object_opts
,
3243 user_creatable_add_opts_foreach
,
3248 /* Choose grow, shrink, or absolute resize mode */
3264 param
= qemu_opts_create(&resize_options
, NULL
, 0, &error_abort
);
3265 qemu_opt_set(param
, BLOCK_OPT_SIZE
, size
, &err
);
3267 error_report_err(err
);
3269 qemu_opts_del(param
);
3272 n
= qemu_opt_get_size(param
, BLOCK_OPT_SIZE
, 0);
3273 qemu_opts_del(param
);
3275 blk
= img_open(image_opts
, filename
, fmt
,
3276 BDRV_O_RDWR
, false, quiet
);
3283 total_size
= blk_getlength(blk
) + n
* relative
;
3287 if (total_size
<= 0) {
3288 error_report("New image size must be positive");
3293 ret
= blk_truncate(blk
, total_size
);
3296 qprintf(quiet
, "Image resized.\n");
3299 error_report("This image does not support resize");
3302 error_report("Image is read-only");
3305 error_report("Error resizing image: %s", strerror(-ret
));
3316 static void amend_status_cb(BlockDriverState
*bs
,
3317 int64_t offset
, int64_t total_work_size
,
3320 qemu_progress_print(100.f
* offset
/ total_work_size
, 0);
3323 static int img_amend(int argc
, char **argv
)
3327 char *options
= NULL
;
3328 QemuOptsList
*create_opts
= NULL
;
3329 QemuOpts
*opts
= NULL
;
3330 const char *fmt
= NULL
, *filename
, *cache
;
3333 bool quiet
= false, progress
= false;
3334 BlockBackend
*blk
= NULL
;
3335 BlockDriverState
*bs
= NULL
;
3336 bool image_opts
= false;
3338 cache
= BDRV_DEFAULT_CACHE
;
3340 static const struct option long_options
[] = {
3341 {"help", no_argument
, 0, 'h'},
3342 {"object", required_argument
, 0, OPTION_OBJECT
},
3343 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
3346 c
= getopt_long(argc
, argv
, "ho:f:t:pq",
3347 long_options
, NULL
);
3358 if (!is_valid_option_list(optarg
)) {
3359 error_report("Invalid option list: %s", optarg
);
3361 goto out_no_progress
;
3364 options
= g_strdup(optarg
);
3366 char *old_options
= options
;
3367 options
= g_strdup_printf("%s,%s", options
, optarg
);
3368 g_free(old_options
);
3384 opts
= qemu_opts_parse_noisily(&qemu_object_opts
,
3388 goto out_no_progress
;
3391 case OPTION_IMAGE_OPTS
:
3398 error_exit("Must specify options (-o)");
3401 if (qemu_opts_foreach(&qemu_object_opts
,
3402 user_creatable_add_opts_foreach
,
3405 goto out_no_progress
;
3411 qemu_progress_init(progress
, 1.0);
3413 filename
= (optind
== argc
- 1) ? argv
[argc
- 1] : NULL
;
3414 if (fmt
&& has_help_option(options
)) {
3415 /* If a format is explicitly specified (and possibly no filename is
3416 * given), print option help here */
3417 ret
= print_block_option_help(filename
, fmt
);
3421 if (optind
!= argc
- 1) {
3422 error_report("Expecting one image file name");
3427 flags
= BDRV_O_RDWR
;
3428 ret
= bdrv_parse_cache_mode(cache
, &flags
, &writethrough
);
3430 error_report("Invalid cache option: %s", cache
);
3434 blk
= img_open(image_opts
, filename
, fmt
, flags
, writethrough
, quiet
);
3441 fmt
= bs
->drv
->format_name
;
3443 if (has_help_option(options
)) {
3444 /* If the format was auto-detected, print option help here */
3445 ret
= print_block_option_help(filename
, fmt
);
3449 if (!bs
->drv
->create_opts
) {
3450 error_report("Format driver '%s' does not support any options to amend",
3456 create_opts
= qemu_opts_append(create_opts
, bs
->drv
->create_opts
);
3457 opts
= qemu_opts_create(create_opts
, NULL
, 0, &error_abort
);
3459 qemu_opts_do_parse(opts
, options
, NULL
, &err
);
3461 error_report_err(err
);
3467 /* In case the driver does not call amend_status_cb() */
3468 qemu_progress_print(0.f
, 0);
3469 ret
= bdrv_amend_options(bs
, opts
, &amend_status_cb
, NULL
);
3470 qemu_progress_print(100.f
, 0);
3472 error_report("Error while amending options: %s", strerror(-ret
));
3477 qemu_progress_end();
3481 qemu_opts_del(opts
);
3482 qemu_opts_free(create_opts
);
3491 typedef struct BenchData
{
3493 uint64_t image_size
;
3500 bool drain_on_flush
;
3509 static void bench_undrained_flush_cb(void *opaque
, int ret
)
3512 error_report("Failed flush request: %s", strerror(-ret
));
3517 static void bench_cb(void *opaque
, int ret
)
3519 BenchData
*b
= opaque
;
3523 error_report("Failed request: %s", strerror(-ret
));
3528 /* Just finished a flush with drained queue: Start next requests */
3529 assert(b
->in_flight
== 0);
3530 b
->in_flush
= false;
3531 } else if (b
->in_flight
> 0) {
3532 int remaining
= b
->n
- b
->in_flight
;
3537 /* Time for flush? Drain queue if requested, then flush */
3538 if (b
->flush_interval
&& remaining
% b
->flush_interval
== 0) {
3539 if (!b
->in_flight
|| !b
->drain_on_flush
) {
3540 BlockCompletionFunc
*cb
;
3542 if (b
->drain_on_flush
) {
3546 cb
= bench_undrained_flush_cb
;
3549 acb
= blk_aio_flush(b
->blk
, cb
, b
);
3551 error_report("Failed to issue flush request");
3555 if (b
->drain_on_flush
) {
3561 while (b
->n
> b
->in_flight
&& b
->in_flight
< b
->nrreq
) {
3562 int64_t offset
= b
->offset
;
3563 /* blk_aio_* might look for completed I/Os and kick bench_cb
3564 * again, so make sure this operation is counted by in_flight
3565 * and b->offset is ready for the next submission.
3568 b
->offset
+= b
->step
;
3569 b
->offset
%= b
->image_size
;
3571 acb
= blk_aio_pwritev(b
->blk
, offset
, b
->qiov
, 0, bench_cb
, b
);
3573 acb
= blk_aio_preadv(b
->blk
, offset
, b
->qiov
, 0, bench_cb
, b
);
3576 error_report("Failed to issue request");
3582 static int img_bench(int argc
, char **argv
)
3585 const char *fmt
= NULL
, *filename
;
3587 bool image_opts
= false;
3588 bool is_write
= false;
3592 size_t bufsize
= 4096;
3595 int flush_interval
= 0;
3596 bool drain_on_flush
= true;
3598 BlockBackend
*blk
= NULL
;
3599 BenchData data
= {};
3601 bool writethrough
= false;
3602 struct timeval t1
, t2
;
3606 static const struct option long_options
[] = {
3607 {"help", no_argument
, 0, 'h'},
3608 {"flush-interval", required_argument
, 0, OPTION_FLUSH_INTERVAL
},
3609 {"image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
3610 {"pattern", required_argument
, 0, OPTION_PATTERN
},
3611 {"no-drain", no_argument
, 0, OPTION_NO_DRAIN
},
3614 c
= getopt_long(argc
, argv
, "hc:d:f:no:qs:S:t:w", long_options
, NULL
);
3628 count
= strtoul(optarg
, &end
, 0);
3629 if (errno
|| *end
|| count
> INT_MAX
) {
3630 error_report("Invalid request count specified");
3639 depth
= strtoul(optarg
, &end
, 0);
3640 if (errno
|| *end
|| depth
> INT_MAX
) {
3641 error_report("Invalid queue depth specified");
3650 flags
|= BDRV_O_NATIVE_AIO
;
3656 offset
= qemu_strtosz_suffix(optarg
, &end
,
3657 QEMU_STRTOSZ_DEFSUFFIX_B
);
3658 if (offset
< 0|| *end
) {
3659 error_report("Invalid offset specified");
3673 sval
= qemu_strtosz_suffix(optarg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
3674 if (sval
< 0 || sval
> INT_MAX
|| *end
) {
3675 error_report("Invalid buffer size specified");
3687 sval
= qemu_strtosz_suffix(optarg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
3688 if (sval
< 0 || sval
> INT_MAX
|| *end
) {
3689 error_report("Invalid step size specified");
3697 ret
= bdrv_parse_cache_mode(optarg
, &flags
, &writethrough
);
3699 error_report("Invalid cache mode");
3705 flags
|= BDRV_O_RDWR
;
3708 case OPTION_PATTERN
:
3712 pattern
= strtoul(optarg
, &end
, 0);
3713 if (errno
|| *end
|| pattern
> 0xff) {
3714 error_report("Invalid pattern byte specified");
3719 case OPTION_FLUSH_INTERVAL
:
3723 flush_interval
= strtoul(optarg
, &end
, 0);
3724 if (errno
|| *end
|| flush_interval
> INT_MAX
) {
3725 error_report("Invalid flush interval specified");
3730 case OPTION_NO_DRAIN
:
3731 drain_on_flush
= false;
3733 case OPTION_IMAGE_OPTS
:
3739 if (optind
!= argc
- 1) {
3740 error_exit("Expecting one image file name");
3742 filename
= argv
[argc
- 1];
3744 if (!is_write
&& flush_interval
) {
3745 error_report("--flush-interval is only available in write tests");
3749 if (flush_interval
&& flush_interval
< depth
) {
3750 error_report("Flush interval can't be smaller than depth");
3755 blk
= img_open(image_opts
, filename
, fmt
, flags
, writethrough
, quiet
);
3761 image_size
= blk_getlength(blk
);
3762 if (image_size
< 0) {
3767 data
= (BenchData
) {
3769 .image_size
= image_size
,
3771 .step
= step
?: bufsize
,
3776 .flush_interval
= flush_interval
,
3777 .drain_on_flush
= drain_on_flush
,
3779 printf("Sending %d %s requests, %d bytes each, %d in parallel "
3780 "(starting at offset %" PRId64
", step size %d)\n",
3781 data
.n
, data
.write
? "write" : "read", data
.bufsize
, data
.nrreq
,
3782 data
.offset
, data
.step
);
3783 if (flush_interval
) {
3784 printf("Sending flush every %d requests\n", flush_interval
);
3787 data
.buf
= blk_blockalign(blk
, data
.nrreq
* data
.bufsize
);
3788 memset(data
.buf
, pattern
, data
.nrreq
* data
.bufsize
);
3790 data
.qiov
= g_new(QEMUIOVector
, data
.nrreq
);
3791 for (i
= 0; i
< data
.nrreq
; i
++) {
3792 qemu_iovec_init(&data
.qiov
[i
], 1);
3793 qemu_iovec_add(&data
.qiov
[i
],
3794 data
.buf
+ i
* data
.bufsize
, data
.bufsize
);
3797 gettimeofday(&t1
, NULL
);
3800 while (data
.n
> 0) {
3801 main_loop_wait(false);
3803 gettimeofday(&t2
, NULL
);
3805 printf("Run completed in %3.3f seconds.\n",
3806 (t2
.tv_sec
- t1
.tv_sec
)
3807 + ((double)(t2
.tv_usec
- t1
.tv_usec
) / 1000000));
3810 qemu_vfree(data
.buf
);
3831 int bsz
; /* Block size */
3839 int (*f
)(const char *, struct DdIo
*, struct DdIo
*, struct DdInfo
*);
3843 static int img_dd_bs(const char *arg
,
3844 struct DdIo
*in
, struct DdIo
*out
,
3850 res
= qemu_strtosz_suffix(arg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
3852 if (res
<= 0 || res
> INT_MAX
|| *end
) {
3853 error_report("invalid number: '%s'", arg
);
3856 in
->bsz
= out
->bsz
= res
;
3861 static int img_dd_count(const char *arg
,
3862 struct DdIo
*in
, struct DdIo
*out
,
3867 dd
->count
= qemu_strtosz_suffix(arg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
3869 if (dd
->count
< 0 || *end
) {
3870 error_report("invalid number: '%s'", arg
);
3877 static int img_dd_if(const char *arg
,
3878 struct DdIo
*in
, struct DdIo
*out
,
3881 in
->filename
= g_strdup(arg
);
3886 static int img_dd_of(const char *arg
,
3887 struct DdIo
*in
, struct DdIo
*out
,
3890 out
->filename
= g_strdup(arg
);
3895 static int img_dd_skip(const char *arg
,
3896 struct DdIo
*in
, struct DdIo
*out
,
3901 in
->offset
= qemu_strtosz_suffix(arg
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
3903 if (in
->offset
< 0 || *end
) {
3904 error_report("invalid number: '%s'", arg
);
3911 static int img_dd(int argc
, char **argv
)
3916 BlockDriver
*drv
= NULL
, *proto_drv
= NULL
;
3917 BlockBackend
*blk1
= NULL
, *blk2
= NULL
;
3918 QemuOpts
*opts
= NULL
;
3919 QemuOptsList
*create_opts
= NULL
;
3920 Error
*local_err
= NULL
;
3921 bool image_opts
= false;
3923 const char *out_fmt
= "raw";
3924 const char *fmt
= NULL
;
3926 int64_t block_count
= 0, out_pos
, in_pos
;
3927 struct DdInfo dd
= {
3932 .bsz
= 512, /* Block size is by default 512 bytes */
3944 const struct DdOpts options
[] = {
3945 { "bs", img_dd_bs
, C_BS
},
3946 { "count", img_dd_count
, C_COUNT
},
3947 { "if", img_dd_if
, C_IF
},
3948 { "of", img_dd_of
, C_OF
},
3949 { "skip", img_dd_skip
, C_SKIP
},
3952 const struct option long_options
[] = {
3953 { "help", no_argument
, 0, 'h'},
3954 { "image-opts", no_argument
, 0, OPTION_IMAGE_OPTS
},
3958 while ((c
= getopt_long(argc
, argv
, "hf:O:", long_options
, NULL
))) {
3970 error_report("Try 'qemu-img --help' for more information.");
3976 case OPTION_IMAGE_OPTS
:
3982 for (i
= optind
; i
< argc
; i
++) {
3984 arg
= g_strdup(argv
[i
]);
3986 tmp
= strchr(arg
, '=');
3988 error_report("unrecognized operand %s", arg
);
3995 for (j
= 0; options
[j
].name
!= NULL
; j
++) {
3996 if (!strcmp(arg
, options
[j
].name
)) {
4000 if (options
[j
].name
== NULL
) {
4001 error_report("unrecognized operand %s", arg
);
4006 if (options
[j
].f(tmp
, &in
, &out
, &dd
) != 0) {
4010 dd
.flags
|= options
[j
].flag
;
4015 if (!(dd
.flags
& C_IF
&& dd
.flags
& C_OF
)) {
4016 error_report("Must specify both input and output files");
4020 blk1
= img_open(image_opts
, in
.filename
, fmt
, 0, false, false);
4027 drv
= bdrv_find_format(out_fmt
);
4029 error_report("Unknown file format");
4033 proto_drv
= bdrv_find_protocol(out
.filename
, true, &local_err
);
4036 error_report_err(local_err
);
4040 if (!drv
->create_opts
) {
4041 error_report("Format driver '%s' does not support image creation",
4046 if (!proto_drv
->create_opts
) {
4047 error_report("Protocol driver '%s' does not support image creation",
4048 proto_drv
->format_name
);
4052 create_opts
= qemu_opts_append(create_opts
, drv
->create_opts
);
4053 create_opts
= qemu_opts_append(create_opts
, proto_drv
->create_opts
);
4055 opts
= qemu_opts_create(create_opts
, NULL
, 0, &error_abort
);
4057 size
= blk_getlength(blk1
);
4059 error_report("Failed to get size for '%s'", in
.filename
);
4064 if (dd
.flags
& C_COUNT
&& dd
.count
<= INT64_MAX
/ in
.bsz
&&
4065 dd
.count
* in
.bsz
< size
) {
4066 size
= dd
.count
* in
.bsz
;
4069 /* Overflow means the specified offset is beyond input image's size */
4070 if (dd
.flags
& C_SKIP
&& (in
.offset
> INT64_MAX
/ in
.bsz
||
4071 size
< in
.bsz
* in
.offset
)) {
4072 qemu_opt_set_number(opts
, BLOCK_OPT_SIZE
, 0, &error_abort
);
4074 qemu_opt_set_number(opts
, BLOCK_OPT_SIZE
,
4075 size
- in
.bsz
* in
.offset
, &error_abort
);
4078 ret
= bdrv_create(drv
, out
.filename
, opts
, &local_err
);
4080 error_reportf_err(local_err
,
4081 "%s: error while creating output image: ",
4087 blk2
= img_open(image_opts
, out
.filename
, out_fmt
, BDRV_O_RDWR
,
4095 if (dd
.flags
& C_SKIP
&& (in
.offset
> INT64_MAX
/ in
.bsz
||
4096 size
< in
.offset
* in
.bsz
)) {
4097 /* We give a warning if the skip option is bigger than the input
4098 * size and create an empty output disk image (i.e. like dd(1)).
4100 error_report("%s: cannot skip to specified offset", in
.filename
);
4103 in_pos
= in
.offset
* in
.bsz
;
4106 in
.buf
= g_new(uint8_t, in
.bsz
);
4108 for (out_pos
= 0; in_pos
< size
; block_count
++) {
4109 int in_ret
, out_ret
;
4111 if (in_pos
+ in
.bsz
> size
) {
4112 in_ret
= blk_pread(blk1
, in_pos
, in
.buf
, size
- in_pos
);
4114 in_ret
= blk_pread(blk1
, in_pos
, in
.buf
, in
.bsz
);
4117 error_report("error while reading from input image file: %s",
4124 out_ret
= blk_pwrite(blk2
, out_pos
, in
.buf
, in_ret
, 0);
4127 error_report("error while writing to output image file: %s",
4128 strerror(-out_ret
));
4137 qemu_opts_del(opts
);
4138 qemu_opts_free(create_opts
);
4141 g_free(in
.filename
);
4142 g_free(out
.filename
);
4153 static const img_cmd_t img_cmds
[] = {
4154 #define DEF(option, callback, arg_string) \
4155 { option, callback },
4156 #include "qemu-img-cmds.h"
4162 int main(int argc
, char **argv
)
4164 const img_cmd_t
*cmd
;
4165 const char *cmdname
;
4166 Error
*local_error
= NULL
;
4167 char *trace_file
= NULL
;
4169 static const struct option long_options
[] = {
4170 {"help", no_argument
, 0, 'h'},
4171 {"version", no_argument
, 0, 'V'},
4172 {"trace", required_argument
, NULL
, 'T'},
4177 signal(SIGPIPE
, SIG_IGN
);
4180 module_call_init(MODULE_INIT_TRACE
);
4181 error_set_progname(argv
[0]);
4182 qemu_init_exec_dir(argv
[0]);
4184 if (qemu_init_main_loop(&local_error
)) {
4185 error_report_err(local_error
);
4189 qcrypto_init(&error_fatal
);
4191 module_call_init(MODULE_INIT_QOM
);
4194 error_exit("Not enough arguments");
4197 qemu_add_opts(&qemu_object_opts
);
4198 qemu_add_opts(&qemu_source_opts
);
4199 qemu_add_opts(&qemu_trace_opts
);
4201 while ((c
= getopt_long(argc
, argv
, "+hVT:", long_options
, NULL
)) != -1) {
4207 printf(QEMU_IMG_VERSION
);
4211 trace_file
= trace_opt_parse(optarg
);
4216 cmdname
= argv
[optind
];
4218 /* reset getopt_long scanning */
4226 if (!trace_init_backends()) {
4229 trace_init_file(trace_file
);
4230 qemu_set_log(LOG_TRACE
);
4232 /* find the command */
4233 for (cmd
= img_cmds
; cmd
->name
!= NULL
; cmd
++) {
4234 if (!strcmp(cmdname
, cmd
->name
)) {
4235 return cmd
->handler(argc
, argv
);
4240 error_exit("Command not found: %s", cmdname
);