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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 "qemu/osdep.h" | |
25 | #include "qapi/error.h" | |
26 | #include "qapi-visit.h" | |
27 | #include "qapi/qmp-output-visitor.h" | |
28 | #include "qapi/qmp/qerror.h" | |
29 | #include "qapi/qmp/qjson.h" | |
30 | #include "qemu/cutils.h" | |
31 | #include "qemu/config-file.h" | |
32 | #include "qemu/option.h" | |
33 | #include "qemu/error-report.h" | |
34 | #include "qom/object_interfaces.h" | |
35 | #include "sysemu/sysemu.h" | |
36 | #include "sysemu/block-backend.h" | |
37 | #include "block/block_int.h" | |
38 | #include "block/blockjob.h" | |
39 | #include "block/qapi.h" | |
40 | #include "crypto/init.h" | |
41 | #include <getopt.h> | |
42 | ||
43 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ | |
44 | ", Copyright (c) 2004-2008 Fabrice Bellard\n" | |
45 | ||
46 | typedef struct img_cmd_t { | |
47 | const char *name; | |
48 | int (*handler)(int argc, char **argv); | |
49 | } img_cmd_t; | |
50 | ||
51 | enum { | |
52 | OPTION_OUTPUT = 256, | |
53 | OPTION_BACKING_CHAIN = 257, | |
54 | OPTION_OBJECT = 258, | |
55 | OPTION_IMAGE_OPTS = 259, | |
56 | }; | |
57 | ||
58 | typedef enum OutputFormat { | |
59 | OFORMAT_JSON, | |
60 | OFORMAT_HUMAN, | |
61 | } OutputFormat; | |
62 | ||
63 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
64 | #define BDRV_DEFAULT_CACHE "writeback" | |
65 | ||
66 | static void format_print(void *opaque, const char *name) | |
67 | { | |
68 | printf(" %s", name); | |
69 | } | |
70 | ||
71 | static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) | |
72 | { | |
73 | va_list ap; | |
74 | ||
75 | error_printf("qemu-img: "); | |
76 | ||
77 | va_start(ap, fmt); | |
78 | error_vprintf(fmt, ap); | |
79 | va_end(ap); | |
80 | ||
81 | error_printf("\nTry 'qemu-img --help' for more information\n"); | |
82 | exit(EXIT_FAILURE); | |
83 | } | |
84 | ||
85 | /* Please keep in synch with qemu-img.texi */ | |
86 | static void QEMU_NORETURN help(void) | |
87 | { | |
88 | const char *help_msg = | |
89 | QEMU_IMG_VERSION | |
90 | "usage: qemu-img command [command options]\n" | |
91 | "QEMU disk image utility\n" | |
92 | "\n" | |
93 | "Command syntax:\n" | |
94 | #define DEF(option, callback, arg_string) \ | |
95 | " " arg_string "\n" | |
96 | #include "qemu-img-cmds.h" | |
97 | #undef DEF | |
98 | #undef GEN_DOCS | |
99 | "\n" | |
100 | "Command parameters:\n" | |
101 | " 'filename' is a disk image filename\n" | |
102 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
103 | " manual page for a description of the object properties. The most common\n" | |
104 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
105 | " encryption keys.\n" | |
106 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
107 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
108 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
109 | " 'directsync' and 'unsafe' (default for convert)\n" | |
110 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
111 | " options are the same as for the 'cache' option\n" | |
112 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
113 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
114 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
115 | " supported. 'b' is ignored.\n" | |
116 | " 'output_filename' is the destination disk image filename\n" | |
117 | " 'output_fmt' is the destination format\n" | |
118 | " 'options' is a comma separated list of format specific options in a\n" | |
119 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
120 | " used format\n" | |
121 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
122 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
123 | " '[ID_OR_NAME]'\n" | |
124 | " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" | |
125 | " instead\n" | |
126 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
127 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
128 | " match exactly. The image doesn't need a working backing file before\n" | |
129 | " rebasing in this case (useful for renaming the backing file)\n" | |
130 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
131 | " '-p' show progress of command (only certain commands)\n" | |
132 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
133 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
134 | " contain only zeros for qemu-img to create a sparse image during\n" | |
135 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
136 | " unallocated or zero sectors, and the destination image will always be\n" | |
137 | " fully allocated\n" | |
138 | " '--output' takes the format in which the output must be done (human or json)\n" | |
139 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
140 | " prior to running qemu-img)\n" | |
141 | "\n" | |
142 | "Parameters to check subcommand:\n" | |
143 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
144 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
145 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
146 | " hiding corruption that has already occurred.\n" | |
147 | "\n" | |
148 | "Parameters to snapshot subcommand:\n" | |
149 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
150 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
151 | " '-c' creates a snapshot\n" | |
152 | " '-d' deletes a snapshot\n" | |
153 | " '-l' lists all snapshots in the given image\n" | |
154 | "\n" | |
155 | "Parameters to compare subcommand:\n" | |
156 | " '-f' first image format\n" | |
157 | " '-F' second image format\n" | |
158 | " '-s' run in Strict mode - fail on different image size or sector allocation\n"; | |
159 | ||
160 | printf("%s\nSupported formats:", help_msg); | |
161 | bdrv_iterate_format(format_print, NULL); | |
162 | printf("\n"); | |
163 | exit(EXIT_SUCCESS); | |
164 | } | |
165 | ||
166 | static QemuOptsList qemu_object_opts = { | |
167 | .name = "object", | |
168 | .implied_opt_name = "qom-type", | |
169 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
170 | .desc = { | |
171 | { } | |
172 | }, | |
173 | }; | |
174 | ||
175 | static QemuOptsList qemu_source_opts = { | |
176 | .name = "source", | |
177 | .implied_opt_name = "file", | |
178 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
179 | .desc = { | |
180 | { } | |
181 | }, | |
182 | }; | |
183 | ||
184 | static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
185 | { | |
186 | int ret = 0; | |
187 | if (!quiet) { | |
188 | va_list args; | |
189 | va_start(args, fmt); | |
190 | ret = vprintf(fmt, args); | |
191 | va_end(args); | |
192 | } | |
193 | return ret; | |
194 | } | |
195 | ||
196 | ||
197 | static int print_block_option_help(const char *filename, const char *fmt) | |
198 | { | |
199 | BlockDriver *drv, *proto_drv; | |
200 | QemuOptsList *create_opts = NULL; | |
201 | Error *local_err = NULL; | |
202 | ||
203 | /* Find driver and parse its options */ | |
204 | drv = bdrv_find_format(fmt); | |
205 | if (!drv) { | |
206 | error_report("Unknown file format '%s'", fmt); | |
207 | return 1; | |
208 | } | |
209 | ||
210 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
211 | if (filename) { | |
212 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
213 | if (!proto_drv) { | |
214 | error_report_err(local_err); | |
215 | qemu_opts_free(create_opts); | |
216 | return 1; | |
217 | } | |
218 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
219 | } | |
220 | ||
221 | qemu_opts_print_help(create_opts); | |
222 | qemu_opts_free(create_opts); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | ||
227 | static int img_open_password(BlockBackend *blk, const char *filename, | |
228 | int flags, bool quiet) | |
229 | { | |
230 | BlockDriverState *bs; | |
231 | char password[256]; | |
232 | ||
233 | bs = blk_bs(blk); | |
234 | if (bdrv_is_encrypted(bs) && bdrv_key_required(bs) && | |
235 | !(flags & BDRV_O_NO_IO)) { | |
236 | qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); | |
237 | if (qemu_read_password(password, sizeof(password)) < 0) { | |
238 | error_report("No password given"); | |
239 | return -1; | |
240 | } | |
241 | if (bdrv_set_key(bs, password) < 0) { | |
242 | error_report("invalid password"); | |
243 | return -1; | |
244 | } | |
245 | } | |
246 | return 0; | |
247 | } | |
248 | ||
249 | ||
250 | static BlockBackend *img_open_opts(const char *optstr, | |
251 | QemuOpts *opts, int flags, bool writethrough, | |
252 | bool quiet) | |
253 | { | |
254 | QDict *options; | |
255 | Error *local_err = NULL; | |
256 | BlockBackend *blk; | |
257 | options = qemu_opts_to_qdict(opts, NULL); | |
258 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
259 | if (!blk) { | |
260 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
261 | return NULL; | |
262 | } | |
263 | blk_set_enable_write_cache(blk, !writethrough); | |
264 | ||
265 | if (img_open_password(blk, optstr, flags, quiet) < 0) { | |
266 | blk_unref(blk); | |
267 | return NULL; | |
268 | } | |
269 | return blk; | |
270 | } | |
271 | ||
272 | static BlockBackend *img_open_file(const char *filename, | |
273 | const char *fmt, int flags, | |
274 | bool writethrough, bool quiet) | |
275 | { | |
276 | BlockBackend *blk; | |
277 | Error *local_err = NULL; | |
278 | QDict *options = NULL; | |
279 | ||
280 | if (fmt) { | |
281 | options = qdict_new(); | |
282 | qdict_put(options, "driver", qstring_from_str(fmt)); | |
283 | } | |
284 | ||
285 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
286 | if (!blk) { | |
287 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
288 | return NULL; | |
289 | } | |
290 | blk_set_enable_write_cache(blk, !writethrough); | |
291 | ||
292 | if (img_open_password(blk, filename, flags, quiet) < 0) { | |
293 | blk_unref(blk); | |
294 | return NULL; | |
295 | } | |
296 | return blk; | |
297 | } | |
298 | ||
299 | ||
300 | static BlockBackend *img_open(bool image_opts, | |
301 | const char *filename, | |
302 | const char *fmt, int flags, bool writethrough, | |
303 | bool quiet) | |
304 | { | |
305 | BlockBackend *blk; | |
306 | if (image_opts) { | |
307 | QemuOpts *opts; | |
308 | if (fmt) { | |
309 | error_report("--image-opts and --format are mutually exclusive"); | |
310 | return NULL; | |
311 | } | |
312 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
313 | filename, true); | |
314 | if (!opts) { | |
315 | return NULL; | |
316 | } | |
317 | blk = img_open_opts(filename, opts, flags, writethrough, quiet); | |
318 | } else { | |
319 | blk = img_open_file(filename, fmt, flags, writethrough, quiet); | |
320 | } | |
321 | return blk; | |
322 | } | |
323 | ||
324 | ||
325 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
326 | const char *base_filename, | |
327 | const char *base_fmt) | |
328 | { | |
329 | Error *err = NULL; | |
330 | ||
331 | if (base_filename) { | |
332 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); | |
333 | if (err) { | |
334 | error_report("Backing file not supported for file format '%s'", | |
335 | fmt); | |
336 | error_free(err); | |
337 | return -1; | |
338 | } | |
339 | } | |
340 | if (base_fmt) { | |
341 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); | |
342 | if (err) { | |
343 | error_report("Backing file format not supported for file " | |
344 | "format '%s'", fmt); | |
345 | error_free(err); | |
346 | return -1; | |
347 | } | |
348 | } | |
349 | return 0; | |
350 | } | |
351 | ||
352 | static int img_create(int argc, char **argv) | |
353 | { | |
354 | int c; | |
355 | uint64_t img_size = -1; | |
356 | const char *fmt = "raw"; | |
357 | const char *base_fmt = NULL; | |
358 | const char *filename; | |
359 | const char *base_filename = NULL; | |
360 | char *options = NULL; | |
361 | Error *local_err = NULL; | |
362 | bool quiet = false; | |
363 | ||
364 | for(;;) { | |
365 | static const struct option long_options[] = { | |
366 | {"help", no_argument, 0, 'h'}, | |
367 | {"object", required_argument, 0, OPTION_OBJECT}, | |
368 | {0, 0, 0, 0} | |
369 | }; | |
370 | c = getopt_long(argc, argv, "F:b:f:he6o:q", | |
371 | long_options, NULL); | |
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 | case OPTION_OBJECT: { | |
414 | QemuOpts *opts; | |
415 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
416 | optarg, true); | |
417 | if (!opts) { | |
418 | goto fail; | |
419 | } | |
420 | } break; | |
421 | } | |
422 | } | |
423 | ||
424 | /* Get the filename */ | |
425 | filename = (optind < argc) ? argv[optind] : NULL; | |
426 | if (options && has_help_option(options)) { | |
427 | g_free(options); | |
428 | return print_block_option_help(filename, fmt); | |
429 | } | |
430 | ||
431 | if (optind >= argc) { | |
432 | error_exit("Expecting image file name"); | |
433 | } | |
434 | optind++; | |
435 | ||
436 | if (qemu_opts_foreach(&qemu_object_opts, | |
437 | user_creatable_add_opts_foreach, | |
438 | NULL, NULL)) { | |
439 | goto fail; | |
440 | } | |
441 | ||
442 | /* Get image size, if specified */ | |
443 | if (optind < argc) { | |
444 | int64_t sval; | |
445 | char *end; | |
446 | sval = qemu_strtosz_suffix(argv[optind++], &end, | |
447 | QEMU_STRTOSZ_DEFSUFFIX_B); | |
448 | if (sval < 0 || *end) { | |
449 | if (sval == -ERANGE) { | |
450 | error_report("Image size must be less than 8 EiB!"); | |
451 | } else { | |
452 | error_report("Invalid image size specified! You may use k, M, " | |
453 | "G, T, P or E suffixes for "); | |
454 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
455 | "petabytes and exabytes."); | |
456 | } | |
457 | goto fail; | |
458 | } | |
459 | img_size = (uint64_t)sval; | |
460 | } | |
461 | if (optind != argc) { | |
462 | error_exit("Unexpected argument: %s", argv[optind]); | |
463 | } | |
464 | ||
465 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
466 | options, img_size, 0, &local_err, quiet); | |
467 | if (local_err) { | |
468 | error_reportf_err(local_err, "%s: ", filename); | |
469 | goto fail; | |
470 | } | |
471 | ||
472 | g_free(options); | |
473 | return 0; | |
474 | ||
475 | fail: | |
476 | g_free(options); | |
477 | return 1; | |
478 | } | |
479 | ||
480 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
481 | { | |
482 | Error *local_err = NULL; | |
483 | QString *str; | |
484 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
485 | QObject *obj; | |
486 | visit_type_ImageCheck(qmp_output_get_visitor(ov), NULL, &check, | |
487 | &local_err); | |
488 | obj = qmp_output_get_qobject(ov); | |
489 | str = qobject_to_json_pretty(obj); | |
490 | assert(str != NULL); | |
491 | qprintf(quiet, "%s\n", qstring_get_str(str)); | |
492 | qobject_decref(obj); | |
493 | qmp_output_visitor_cleanup(ov); | |
494 | QDECREF(str); | |
495 | } | |
496 | ||
497 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
498 | { | |
499 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
500 | qprintf(quiet, "No errors were found on the image.\n"); | |
501 | } else { | |
502 | if (check->corruptions) { | |
503 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
504 | "Data may be corrupted, or further writes to the image " | |
505 | "may corrupt it.\n", | |
506 | check->corruptions); | |
507 | } | |
508 | ||
509 | if (check->leaks) { | |
510 | qprintf(quiet, | |
511 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
512 | "This means waste of disk space, but no harm to data.\n", | |
513 | check->leaks); | |
514 | } | |
515 | ||
516 | if (check->check_errors) { | |
517 | qprintf(quiet, | |
518 | "\n%" PRId64 | |
519 | " internal errors have occurred during the check.\n", | |
520 | check->check_errors); | |
521 | } | |
522 | } | |
523 | ||
524 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
525 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
526 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
527 | check->allocated_clusters, check->total_clusters, | |
528 | check->allocated_clusters * 100.0 / check->total_clusters, | |
529 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
530 | check->compressed_clusters * 100.0 / | |
531 | check->allocated_clusters); | |
532 | } | |
533 | ||
534 | if (check->image_end_offset) { | |
535 | qprintf(quiet, | |
536 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
537 | } | |
538 | } | |
539 | ||
540 | static int collect_image_check(BlockDriverState *bs, | |
541 | ImageCheck *check, | |
542 | const char *filename, | |
543 | const char *fmt, | |
544 | int fix) | |
545 | { | |
546 | int ret; | |
547 | BdrvCheckResult result; | |
548 | ||
549 | ret = bdrv_check(bs, &result, fix); | |
550 | if (ret < 0) { | |
551 | return ret; | |
552 | } | |
553 | ||
554 | check->filename = g_strdup(filename); | |
555 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
556 | check->check_errors = result.check_errors; | |
557 | check->corruptions = result.corruptions; | |
558 | check->has_corruptions = result.corruptions != 0; | |
559 | check->leaks = result.leaks; | |
560 | check->has_leaks = result.leaks != 0; | |
561 | check->corruptions_fixed = result.corruptions_fixed; | |
562 | check->has_corruptions_fixed = result.corruptions != 0; | |
563 | check->leaks_fixed = result.leaks_fixed; | |
564 | check->has_leaks_fixed = result.leaks != 0; | |
565 | check->image_end_offset = result.image_end_offset; | |
566 | check->has_image_end_offset = result.image_end_offset != 0; | |
567 | check->total_clusters = result.bfi.total_clusters; | |
568 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
569 | check->allocated_clusters = result.bfi.allocated_clusters; | |
570 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
571 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
572 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
573 | check->compressed_clusters = result.bfi.compressed_clusters; | |
574 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Checks an image for consistency. Exit codes: | |
581 | * | |
582 | * 0 - Check completed, image is good | |
583 | * 1 - Check not completed because of internal errors | |
584 | * 2 - Check completed, image is corrupted | |
585 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
586 | * 63 - Checks are not supported by the image format | |
587 | */ | |
588 | static int img_check(int argc, char **argv) | |
589 | { | |
590 | int c, ret; | |
591 | OutputFormat output_format = OFORMAT_HUMAN; | |
592 | const char *filename, *fmt, *output, *cache; | |
593 | BlockBackend *blk; | |
594 | BlockDriverState *bs; | |
595 | int fix = 0; | |
596 | int flags = BDRV_O_CHECK; | |
597 | bool writethrough; | |
598 | ImageCheck *check; | |
599 | bool quiet = false; | |
600 | bool image_opts = false; | |
601 | ||
602 | fmt = NULL; | |
603 | output = NULL; | |
604 | cache = BDRV_DEFAULT_CACHE; | |
605 | ||
606 | for(;;) { | |
607 | int option_index = 0; | |
608 | static const struct option long_options[] = { | |
609 | {"help", no_argument, 0, 'h'}, | |
610 | {"format", required_argument, 0, 'f'}, | |
611 | {"repair", required_argument, 0, 'r'}, | |
612 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
613 | {"object", required_argument, 0, OPTION_OBJECT}, | |
614 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
615 | {0, 0, 0, 0} | |
616 | }; | |
617 | c = getopt_long(argc, argv, "hf:r:T:q", | |
618 | long_options, &option_index); | |
619 | if (c == -1) { | |
620 | break; | |
621 | } | |
622 | switch(c) { | |
623 | case '?': | |
624 | case 'h': | |
625 | help(); | |
626 | break; | |
627 | case 'f': | |
628 | fmt = optarg; | |
629 | break; | |
630 | case 'r': | |
631 | flags |= BDRV_O_RDWR; | |
632 | ||
633 | if (!strcmp(optarg, "leaks")) { | |
634 | fix = BDRV_FIX_LEAKS; | |
635 | } else if (!strcmp(optarg, "all")) { | |
636 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
637 | } else { | |
638 | error_exit("Unknown option value for -r " | |
639 | "(expecting 'leaks' or 'all'): %s", optarg); | |
640 | } | |
641 | break; | |
642 | case OPTION_OUTPUT: | |
643 | output = optarg; | |
644 | break; | |
645 | case 'T': | |
646 | cache = optarg; | |
647 | break; | |
648 | case 'q': | |
649 | quiet = true; | |
650 | break; | |
651 | case OPTION_OBJECT: { | |
652 | QemuOpts *opts; | |
653 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
654 | optarg, true); | |
655 | if (!opts) { | |
656 | return 1; | |
657 | } | |
658 | } break; | |
659 | case OPTION_IMAGE_OPTS: | |
660 | image_opts = true; | |
661 | break; | |
662 | } | |
663 | } | |
664 | if (optind != argc - 1) { | |
665 | error_exit("Expecting one image file name"); | |
666 | } | |
667 | filename = argv[optind++]; | |
668 | ||
669 | if (output && !strcmp(output, "json")) { | |
670 | output_format = OFORMAT_JSON; | |
671 | } else if (output && !strcmp(output, "human")) { | |
672 | output_format = OFORMAT_HUMAN; | |
673 | } else if (output) { | |
674 | error_report("--output must be used with human or json as argument."); | |
675 | return 1; | |
676 | } | |
677 | ||
678 | if (qemu_opts_foreach(&qemu_object_opts, | |
679 | user_creatable_add_opts_foreach, | |
680 | NULL, NULL)) { | |
681 | return 1; | |
682 | } | |
683 | ||
684 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
685 | if (ret < 0) { | |
686 | error_report("Invalid source cache option: %s", cache); | |
687 | return 1; | |
688 | } | |
689 | ||
690 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
691 | if (!blk) { | |
692 | return 1; | |
693 | } | |
694 | bs = blk_bs(blk); | |
695 | ||
696 | check = g_new0(ImageCheck, 1); | |
697 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
698 | ||
699 | if (ret == -ENOTSUP) { | |
700 | error_report("This image format does not support checks"); | |
701 | ret = 63; | |
702 | goto fail; | |
703 | } | |
704 | ||
705 | if (check->corruptions_fixed || check->leaks_fixed) { | |
706 | int corruptions_fixed, leaks_fixed; | |
707 | ||
708 | leaks_fixed = check->leaks_fixed; | |
709 | corruptions_fixed = check->corruptions_fixed; | |
710 | ||
711 | if (output_format == OFORMAT_HUMAN) { | |
712 | qprintf(quiet, | |
713 | "The following inconsistencies were found and repaired:\n\n" | |
714 | " %" PRId64 " leaked clusters\n" | |
715 | " %" PRId64 " corruptions\n\n" | |
716 | "Double checking the fixed image now...\n", | |
717 | check->leaks_fixed, | |
718 | check->corruptions_fixed); | |
719 | } | |
720 | ||
721 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
722 | ||
723 | check->leaks_fixed = leaks_fixed; | |
724 | check->corruptions_fixed = corruptions_fixed; | |
725 | } | |
726 | ||
727 | if (!ret) { | |
728 | switch (output_format) { | |
729 | case OFORMAT_HUMAN: | |
730 | dump_human_image_check(check, quiet); | |
731 | break; | |
732 | case OFORMAT_JSON: | |
733 | dump_json_image_check(check, quiet); | |
734 | break; | |
735 | } | |
736 | } | |
737 | ||
738 | if (ret || check->check_errors) { | |
739 | if (ret) { | |
740 | error_report("Check failed: %s", strerror(-ret)); | |
741 | } else { | |
742 | error_report("Check failed"); | |
743 | } | |
744 | ret = 1; | |
745 | goto fail; | |
746 | } | |
747 | ||
748 | if (check->corruptions) { | |
749 | ret = 2; | |
750 | } else if (check->leaks) { | |
751 | ret = 3; | |
752 | } else { | |
753 | ret = 0; | |
754 | } | |
755 | ||
756 | fail: | |
757 | qapi_free_ImageCheck(check); | |
758 | blk_unref(blk); | |
759 | return ret; | |
760 | } | |
761 | ||
762 | typedef struct CommonBlockJobCBInfo { | |
763 | BlockDriverState *bs; | |
764 | Error **errp; | |
765 | } CommonBlockJobCBInfo; | |
766 | ||
767 | static void common_block_job_cb(void *opaque, int ret) | |
768 | { | |
769 | CommonBlockJobCBInfo *cbi = opaque; | |
770 | ||
771 | if (ret < 0) { | |
772 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
773 | } | |
774 | } | |
775 | ||
776 | static void run_block_job(BlockJob *job, Error **errp) | |
777 | { | |
778 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
779 | ||
780 | do { | |
781 | aio_poll(aio_context, true); | |
782 | qemu_progress_print(job->len ? | |
783 | ((float)job->offset / job->len * 100.f) : 0.0f, 0); | |
784 | } while (!job->ready); | |
785 | ||
786 | block_job_complete_sync(job, errp); | |
787 | ||
788 | /* A block job may finish instantaneously without publishing any progress, | |
789 | * so just signal completion here */ | |
790 | qemu_progress_print(100.f, 0); | |
791 | } | |
792 | ||
793 | static int img_commit(int argc, char **argv) | |
794 | { | |
795 | int c, ret, flags; | |
796 | const char *filename, *fmt, *cache, *base; | |
797 | BlockBackend *blk; | |
798 | BlockDriverState *bs, *base_bs; | |
799 | bool progress = false, quiet = false, drop = false; | |
800 | bool writethrough; | |
801 | Error *local_err = NULL; | |
802 | CommonBlockJobCBInfo cbi; | |
803 | bool image_opts = false; | |
804 | ||
805 | fmt = NULL; | |
806 | cache = BDRV_DEFAULT_CACHE; | |
807 | base = NULL; | |
808 | for(;;) { | |
809 | static const struct option long_options[] = { | |
810 | {"help", no_argument, 0, 'h'}, | |
811 | {"object", required_argument, 0, OPTION_OBJECT}, | |
812 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
813 | {0, 0, 0, 0} | |
814 | }; | |
815 | c = getopt_long(argc, argv, "f:ht:b:dpq", | |
816 | long_options, NULL); | |
817 | if (c == -1) { | |
818 | break; | |
819 | } | |
820 | switch(c) { | |
821 | case '?': | |
822 | case 'h': | |
823 | help(); | |
824 | break; | |
825 | case 'f': | |
826 | fmt = optarg; | |
827 | break; | |
828 | case 't': | |
829 | cache = optarg; | |
830 | break; | |
831 | case 'b': | |
832 | base = optarg; | |
833 | /* -b implies -d */ | |
834 | drop = true; | |
835 | break; | |
836 | case 'd': | |
837 | drop = true; | |
838 | break; | |
839 | case 'p': | |
840 | progress = true; | |
841 | break; | |
842 | case 'q': | |
843 | quiet = true; | |
844 | break; | |
845 | case OPTION_OBJECT: { | |
846 | QemuOpts *opts; | |
847 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
848 | optarg, true); | |
849 | if (!opts) { | |
850 | return 1; | |
851 | } | |
852 | } break; | |
853 | case OPTION_IMAGE_OPTS: | |
854 | image_opts = true; | |
855 | break; | |
856 | } | |
857 | } | |
858 | ||
859 | /* Progress is not shown in Quiet mode */ | |
860 | if (quiet) { | |
861 | progress = false; | |
862 | } | |
863 | ||
864 | if (optind != argc - 1) { | |
865 | error_exit("Expecting one image file name"); | |
866 | } | |
867 | filename = argv[optind++]; | |
868 | ||
869 | if (qemu_opts_foreach(&qemu_object_opts, | |
870 | user_creatable_add_opts_foreach, | |
871 | NULL, NULL)) { | |
872 | return 1; | |
873 | } | |
874 | ||
875 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
876 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
877 | if (ret < 0) { | |
878 | error_report("Invalid cache option: %s", cache); | |
879 | return 1; | |
880 | } | |
881 | ||
882 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
883 | if (!blk) { | |
884 | return 1; | |
885 | } | |
886 | bs = blk_bs(blk); | |
887 | ||
888 | qemu_progress_init(progress, 1.f); | |
889 | qemu_progress_print(0.f, 100); | |
890 | ||
891 | if (base) { | |
892 | base_bs = bdrv_find_backing_image(bs, base); | |
893 | if (!base_bs) { | |
894 | error_setg(&local_err, QERR_BASE_NOT_FOUND, base); | |
895 | goto done; | |
896 | } | |
897 | } else { | |
898 | /* This is different from QMP, which by default uses the deepest file in | |
899 | * the backing chain (i.e., the very base); however, the traditional | |
900 | * behavior of qemu-img commit is using the immediate backing file. */ | |
901 | base_bs = backing_bs(bs); | |
902 | if (!base_bs) { | |
903 | error_setg(&local_err, "Image does not have a backing file"); | |
904 | goto done; | |
905 | } | |
906 | } | |
907 | ||
908 | cbi = (CommonBlockJobCBInfo){ | |
909 | .errp = &local_err, | |
910 | .bs = bs, | |
911 | }; | |
912 | ||
913 | commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, | |
914 | common_block_job_cb, &cbi, &local_err); | |
915 | if (local_err) { | |
916 | goto done; | |
917 | } | |
918 | ||
919 | /* When the block job completes, the BlockBackend reference will point to | |
920 | * the old backing file. In order to avoid that the top image is already | |
921 | * deleted, so we can still empty it afterwards, increment the reference | |
922 | * counter here preemptively. */ | |
923 | if (!drop) { | |
924 | bdrv_ref(bs); | |
925 | } | |
926 | ||
927 | run_block_job(bs->job, &local_err); | |
928 | if (local_err) { | |
929 | goto unref_backing; | |
930 | } | |
931 | ||
932 | if (!drop && bs->drv->bdrv_make_empty) { | |
933 | ret = bs->drv->bdrv_make_empty(bs); | |
934 | if (ret) { | |
935 | error_setg_errno(&local_err, -ret, "Could not empty %s", | |
936 | filename); | |
937 | goto unref_backing; | |
938 | } | |
939 | } | |
940 | ||
941 | unref_backing: | |
942 | if (!drop) { | |
943 | bdrv_unref(bs); | |
944 | } | |
945 | ||
946 | done: | |
947 | qemu_progress_end(); | |
948 | ||
949 | blk_unref(blk); | |
950 | ||
951 | if (local_err) { | |
952 | error_report_err(local_err); | |
953 | return 1; | |
954 | } | |
955 | ||
956 | qprintf(quiet, "Image committed.\n"); | |
957 | return 0; | |
958 | } | |
959 | ||
960 | /* | |
961 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
962 | * a non-NUL byte. | |
963 | * | |
964 | * 'pnum' is set to the number of sectors (including and immediately following | |
965 | * the first one) that are known to be in the same allocated/unallocated state. | |
966 | */ | |
967 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) | |
968 | { | |
969 | bool is_zero; | |
970 | int i; | |
971 | ||
972 | if (n <= 0) { | |
973 | *pnum = 0; | |
974 | return 0; | |
975 | } | |
976 | is_zero = buffer_is_zero(buf, 512); | |
977 | for(i = 1; i < n; i++) { | |
978 | buf += 512; | |
979 | if (is_zero != buffer_is_zero(buf, 512)) { | |
980 | break; | |
981 | } | |
982 | } | |
983 | *pnum = i; | |
984 | return !is_zero; | |
985 | } | |
986 | ||
987 | /* | |
988 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
989 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
990 | * breaking up write requests for only small sparse areas. | |
991 | */ | |
992 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
993 | int min) | |
994 | { | |
995 | int ret; | |
996 | int num_checked, num_used; | |
997 | ||
998 | if (n < min) { | |
999 | min = n; | |
1000 | } | |
1001 | ||
1002 | ret = is_allocated_sectors(buf, n, pnum); | |
1003 | if (!ret) { | |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | num_used = *pnum; | |
1008 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1009 | n -= *pnum; | |
1010 | num_checked = num_used; | |
1011 | ||
1012 | while (n > 0) { | |
1013 | ret = is_allocated_sectors(buf, n, pnum); | |
1014 | ||
1015 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1016 | n -= *pnum; | |
1017 | num_checked += *pnum; | |
1018 | if (ret) { | |
1019 | num_used = num_checked; | |
1020 | } else if (*pnum >= min) { | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | *pnum = num_used; | |
1026 | return 1; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
1031 | * buffers matches, non-zero otherwise. | |
1032 | * | |
1033 | * pnum is set to the number of sectors (including and immediately following | |
1034 | * the first one) that are known to have the same comparison result | |
1035 | */ | |
1036 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
1037 | int *pnum) | |
1038 | { | |
1039 | bool res; | |
1040 | int i; | |
1041 | ||
1042 | if (n <= 0) { | |
1043 | *pnum = 0; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | res = !!memcmp(buf1, buf2, 512); | |
1048 | for(i = 1; i < n; i++) { | |
1049 | buf1 += 512; | |
1050 | buf2 += 512; | |
1051 | ||
1052 | if (!!memcmp(buf1, buf2, 512) != res) { | |
1053 | break; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | *pnum = i; | |
1058 | return res; | |
1059 | } | |
1060 | ||
1061 | #define IO_BUF_SIZE (2 * 1024 * 1024) | |
1062 | ||
1063 | static int64_t sectors_to_bytes(int64_t sectors) | |
1064 | { | |
1065 | return sectors << BDRV_SECTOR_BITS; | |
1066 | } | |
1067 | ||
1068 | static int64_t sectors_to_process(int64_t total, int64_t from) | |
1069 | { | |
1070 | return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1075 | * | |
1076 | * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero | |
1077 | * data and negative value on error. | |
1078 | * | |
1079 | * @param blk: BlockBackend for the image | |
1080 | * @param sect_num: Number of first sector to check | |
1081 | * @param sect_count: Number of sectors to check | |
1082 | * @param filename: Name of disk file we are checking (logging purpose) | |
1083 | * @param buffer: Allocated buffer for storing read data | |
1084 | * @param quiet: Flag for quiet mode | |
1085 | */ | |
1086 | static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, | |
1087 | int sect_count, const char *filename, | |
1088 | uint8_t *buffer, bool quiet) | |
1089 | { | |
1090 | int pnum, ret = 0; | |
1091 | ret = blk_pread(blk, sect_num << BDRV_SECTOR_BITS, buffer, | |
1092 | sect_count << BDRV_SECTOR_BITS); | |
1093 | if (ret < 0) { | |
1094 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1095 | sectors_to_bytes(sect_num), filename, strerror(-ret)); | |
1096 | return ret; | |
1097 | } | |
1098 | ret = is_allocated_sectors(buffer, sect_count, &pnum); | |
1099 | if (ret || pnum != sect_count) { | |
1100 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1101 | sectors_to_bytes(ret ? sect_num : sect_num + pnum)); | |
1102 | return 1; | |
1103 | } | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Compares two images. Exit codes: | |
1110 | * | |
1111 | * 0 - Images are identical | |
1112 | * 1 - Images differ | |
1113 | * >1 - Error occurred | |
1114 | */ | |
1115 | static int img_compare(int argc, char **argv) | |
1116 | { | |
1117 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1118 | BlockBackend *blk1, *blk2; | |
1119 | BlockDriverState *bs1, *bs2; | |
1120 | int64_t total_sectors1, total_sectors2; | |
1121 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1122 | int pnum1, pnum2; | |
1123 | int allocated1, allocated2; | |
1124 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1125 | bool progress = false, quiet = false, strict = false; | |
1126 | int flags; | |
1127 | bool writethrough; | |
1128 | int64_t total_sectors; | |
1129 | int64_t sector_num = 0; | |
1130 | int64_t nb_sectors; | |
1131 | int c, pnum; | |
1132 | uint64_t progress_base; | |
1133 | bool image_opts = false; | |
1134 | ||
1135 | cache = BDRV_DEFAULT_CACHE; | |
1136 | for (;;) { | |
1137 | static const struct option long_options[] = { | |
1138 | {"help", no_argument, 0, 'h'}, | |
1139 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1140 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1141 | {0, 0, 0, 0} | |
1142 | }; | |
1143 | c = getopt_long(argc, argv, "hf:F:T:pqs", | |
1144 | long_options, NULL); | |
1145 | if (c == -1) { | |
1146 | break; | |
1147 | } | |
1148 | switch (c) { | |
1149 | case '?': | |
1150 | case 'h': | |
1151 | help(); | |
1152 | break; | |
1153 | case 'f': | |
1154 | fmt1 = optarg; | |
1155 | break; | |
1156 | case 'F': | |
1157 | fmt2 = optarg; | |
1158 | break; | |
1159 | case 'T': | |
1160 | cache = optarg; | |
1161 | break; | |
1162 | case 'p': | |
1163 | progress = true; | |
1164 | break; | |
1165 | case 'q': | |
1166 | quiet = true; | |
1167 | break; | |
1168 | case 's': | |
1169 | strict = true; | |
1170 | break; | |
1171 | case OPTION_OBJECT: { | |
1172 | QemuOpts *opts; | |
1173 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1174 | optarg, true); | |
1175 | if (!opts) { | |
1176 | ret = 2; | |
1177 | goto out4; | |
1178 | } | |
1179 | } break; | |
1180 | case OPTION_IMAGE_OPTS: | |
1181 | image_opts = true; | |
1182 | break; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | /* Progress is not shown in Quiet mode */ | |
1187 | if (quiet) { | |
1188 | progress = false; | |
1189 | } | |
1190 | ||
1191 | ||
1192 | if (optind != argc - 2) { | |
1193 | error_exit("Expecting two image file names"); | |
1194 | } | |
1195 | filename1 = argv[optind++]; | |
1196 | filename2 = argv[optind++]; | |
1197 | ||
1198 | if (qemu_opts_foreach(&qemu_object_opts, | |
1199 | user_creatable_add_opts_foreach, | |
1200 | NULL, NULL)) { | |
1201 | ret = 2; | |
1202 | goto out4; | |
1203 | } | |
1204 | ||
1205 | /* Initialize before goto out */ | |
1206 | qemu_progress_init(progress, 2.0); | |
1207 | ||
1208 | flags = 0; | |
1209 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1210 | if (ret < 0) { | |
1211 | error_report("Invalid source cache option: %s", cache); | |
1212 | ret = 2; | |
1213 | goto out3; | |
1214 | } | |
1215 | ||
1216 | blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); | |
1217 | if (!blk1) { | |
1218 | ret = 2; | |
1219 | goto out3; | |
1220 | } | |
1221 | ||
1222 | blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); | |
1223 | if (!blk2) { | |
1224 | ret = 2; | |
1225 | goto out2; | |
1226 | } | |
1227 | bs1 = blk_bs(blk1); | |
1228 | bs2 = blk_bs(blk2); | |
1229 | ||
1230 | buf1 = blk_blockalign(blk1, IO_BUF_SIZE); | |
1231 | buf2 = blk_blockalign(blk2, IO_BUF_SIZE); | |
1232 | total_sectors1 = blk_nb_sectors(blk1); | |
1233 | if (total_sectors1 < 0) { | |
1234 | error_report("Can't get size of %s: %s", | |
1235 | filename1, strerror(-total_sectors1)); | |
1236 | ret = 4; | |
1237 | goto out; | |
1238 | } | |
1239 | total_sectors2 = blk_nb_sectors(blk2); | |
1240 | if (total_sectors2 < 0) { | |
1241 | error_report("Can't get size of %s: %s", | |
1242 | filename2, strerror(-total_sectors2)); | |
1243 | ret = 4; | |
1244 | goto out; | |
1245 | } | |
1246 | total_sectors = MIN(total_sectors1, total_sectors2); | |
1247 | progress_base = MAX(total_sectors1, total_sectors2); | |
1248 | ||
1249 | qemu_progress_print(0, 100); | |
1250 | ||
1251 | if (strict && total_sectors1 != total_sectors2) { | |
1252 | ret = 1; | |
1253 | qprintf(quiet, "Strict mode: Image size mismatch!\n"); | |
1254 | goto out; | |
1255 | } | |
1256 | ||
1257 | for (;;) { | |
1258 | int64_t status1, status2; | |
1259 | BlockDriverState *file; | |
1260 | ||
1261 | nb_sectors = sectors_to_process(total_sectors, sector_num); | |
1262 | if (nb_sectors <= 0) { | |
1263 | break; | |
1264 | } | |
1265 | status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, | |
1266 | total_sectors1 - sector_num, | |
1267 | &pnum1, &file); | |
1268 | if (status1 < 0) { | |
1269 | ret = 3; | |
1270 | error_report("Sector allocation test failed for %s", filename1); | |
1271 | goto out; | |
1272 | } | |
1273 | allocated1 = status1 & BDRV_BLOCK_ALLOCATED; | |
1274 | ||
1275 | status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, | |
1276 | total_sectors2 - sector_num, | |
1277 | &pnum2, &file); | |
1278 | if (status2 < 0) { | |
1279 | ret = 3; | |
1280 | error_report("Sector allocation test failed for %s", filename2); | |
1281 | goto out; | |
1282 | } | |
1283 | allocated2 = status2 & BDRV_BLOCK_ALLOCATED; | |
1284 | if (pnum1) { | |
1285 | nb_sectors = MIN(nb_sectors, pnum1); | |
1286 | } | |
1287 | if (pnum2) { | |
1288 | nb_sectors = MIN(nb_sectors, pnum2); | |
1289 | } | |
1290 | ||
1291 | if (strict) { | |
1292 | if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != | |
1293 | (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { | |
1294 | ret = 1; | |
1295 | qprintf(quiet, "Strict mode: Offset %" PRId64 | |
1296 | " block status mismatch!\n", | |
1297 | sectors_to_bytes(sector_num)); | |
1298 | goto out; | |
1299 | } | |
1300 | } | |
1301 | if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { | |
1302 | nb_sectors = MIN(pnum1, pnum2); | |
1303 | } else if (allocated1 == allocated2) { | |
1304 | if (allocated1) { | |
1305 | ret = blk_pread(blk1, sector_num << BDRV_SECTOR_BITS, buf1, | |
1306 | nb_sectors << BDRV_SECTOR_BITS); | |
1307 | if (ret < 0) { | |
1308 | error_report("Error while reading offset %" PRId64 " of %s:" | |
1309 | " %s", sectors_to_bytes(sector_num), filename1, | |
1310 | strerror(-ret)); | |
1311 | ret = 4; | |
1312 | goto out; | |
1313 | } | |
1314 | ret = blk_pread(blk2, sector_num << BDRV_SECTOR_BITS, buf2, | |
1315 | nb_sectors << BDRV_SECTOR_BITS); | |
1316 | if (ret < 0) { | |
1317 | error_report("Error while reading offset %" PRId64 | |
1318 | " of %s: %s", sectors_to_bytes(sector_num), | |
1319 | filename2, strerror(-ret)); | |
1320 | ret = 4; | |
1321 | goto out; | |
1322 | } | |
1323 | ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); | |
1324 | if (ret || pnum != nb_sectors) { | |
1325 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1326 | sectors_to_bytes( | |
1327 | ret ? sector_num : sector_num + pnum)); | |
1328 | ret = 1; | |
1329 | goto out; | |
1330 | } | |
1331 | } | |
1332 | } else { | |
1333 | ||
1334 | if (allocated1) { | |
1335 | ret = check_empty_sectors(blk1, sector_num, nb_sectors, | |
1336 | filename1, buf1, quiet); | |
1337 | } else { | |
1338 | ret = check_empty_sectors(blk2, sector_num, nb_sectors, | |
1339 | filename2, buf1, quiet); | |
1340 | } | |
1341 | if (ret) { | |
1342 | if (ret < 0) { | |
1343 | error_report("Error while reading offset %" PRId64 ": %s", | |
1344 | sectors_to_bytes(sector_num), strerror(-ret)); | |
1345 | ret = 4; | |
1346 | } | |
1347 | goto out; | |
1348 | } | |
1349 | } | |
1350 | sector_num += nb_sectors; | |
1351 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1352 | } | |
1353 | ||
1354 | if (total_sectors1 != total_sectors2) { | |
1355 | BlockBackend *blk_over; | |
1356 | int64_t total_sectors_over; | |
1357 | const char *filename_over; | |
1358 | ||
1359 | qprintf(quiet, "Warning: Image size mismatch!\n"); | |
1360 | if (total_sectors1 > total_sectors2) { | |
1361 | total_sectors_over = total_sectors1; | |
1362 | blk_over = blk1; | |
1363 | filename_over = filename1; | |
1364 | } else { | |
1365 | total_sectors_over = total_sectors2; | |
1366 | blk_over = blk2; | |
1367 | filename_over = filename2; | |
1368 | } | |
1369 | ||
1370 | for (;;) { | |
1371 | nb_sectors = sectors_to_process(total_sectors_over, sector_num); | |
1372 | if (nb_sectors <= 0) { | |
1373 | break; | |
1374 | } | |
1375 | ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, | |
1376 | nb_sectors, &pnum); | |
1377 | if (ret < 0) { | |
1378 | ret = 3; | |
1379 | error_report("Sector allocation test failed for %s", | |
1380 | filename_over); | |
1381 | goto out; | |
1382 | ||
1383 | } | |
1384 | nb_sectors = pnum; | |
1385 | if (ret) { | |
1386 | ret = check_empty_sectors(blk_over, sector_num, nb_sectors, | |
1387 | filename_over, buf1, quiet); | |
1388 | if (ret) { | |
1389 | if (ret < 0) { | |
1390 | error_report("Error while reading offset %" PRId64 | |
1391 | " of %s: %s", sectors_to_bytes(sector_num), | |
1392 | filename_over, strerror(-ret)); | |
1393 | ret = 4; | |
1394 | } | |
1395 | goto out; | |
1396 | } | |
1397 | } | |
1398 | sector_num += nb_sectors; | |
1399 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | qprintf(quiet, "Images are identical.\n"); | |
1404 | ret = 0; | |
1405 | ||
1406 | out: | |
1407 | qemu_vfree(buf1); | |
1408 | qemu_vfree(buf2); | |
1409 | blk_unref(blk2); | |
1410 | out2: | |
1411 | blk_unref(blk1); | |
1412 | out3: | |
1413 | qemu_progress_end(); | |
1414 | out4: | |
1415 | return ret; | |
1416 | } | |
1417 | ||
1418 | enum ImgConvertBlockStatus { | |
1419 | BLK_DATA, | |
1420 | BLK_ZERO, | |
1421 | BLK_BACKING_FILE, | |
1422 | }; | |
1423 | ||
1424 | typedef struct ImgConvertState { | |
1425 | BlockBackend **src; | |
1426 | int64_t *src_sectors; | |
1427 | int src_cur, src_num; | |
1428 | int64_t src_cur_offset; | |
1429 | int64_t total_sectors; | |
1430 | int64_t allocated_sectors; | |
1431 | enum ImgConvertBlockStatus status; | |
1432 | int64_t sector_next_status; | |
1433 | BlockBackend *target; | |
1434 | bool has_zero_init; | |
1435 | bool compressed; | |
1436 | bool target_has_backing; | |
1437 | int min_sparse; | |
1438 | size_t cluster_sectors; | |
1439 | size_t buf_sectors; | |
1440 | } ImgConvertState; | |
1441 | ||
1442 | static void convert_select_part(ImgConvertState *s, int64_t sector_num) | |
1443 | { | |
1444 | assert(sector_num >= s->src_cur_offset); | |
1445 | while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { | |
1446 | s->src_cur_offset += s->src_sectors[s->src_cur]; | |
1447 | s->src_cur++; | |
1448 | assert(s->src_cur < s->src_num); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1453 | { | |
1454 | int64_t ret; | |
1455 | int n; | |
1456 | ||
1457 | convert_select_part(s, sector_num); | |
1458 | ||
1459 | assert(s->total_sectors > sector_num); | |
1460 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1461 | ||
1462 | if (s->sector_next_status <= sector_num) { | |
1463 | BlockDriverState *file; | |
1464 | ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), | |
1465 | sector_num - s->src_cur_offset, | |
1466 | n, &n, &file); | |
1467 | if (ret < 0) { | |
1468 | return ret; | |
1469 | } | |
1470 | ||
1471 | if (ret & BDRV_BLOCK_ZERO) { | |
1472 | s->status = BLK_ZERO; | |
1473 | } else if (ret & BDRV_BLOCK_DATA) { | |
1474 | s->status = BLK_DATA; | |
1475 | } else if (!s->target_has_backing) { | |
1476 | /* Without a target backing file we must copy over the contents of | |
1477 | * the backing file as well. */ | |
1478 | /* Check block status of the backing file chain to avoid | |
1479 | * needlessly reading zeroes and limiting the iteration to the | |
1480 | * buffer size */ | |
1481 | ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL, | |
1482 | sector_num - s->src_cur_offset, | |
1483 | n, &n, &file); | |
1484 | if (ret < 0) { | |
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | if (ret & BDRV_BLOCK_ZERO) { | |
1489 | s->status = BLK_ZERO; | |
1490 | } else { | |
1491 | s->status = BLK_DATA; | |
1492 | } | |
1493 | } else { | |
1494 | s->status = BLK_BACKING_FILE; | |
1495 | } | |
1496 | ||
1497 | s->sector_next_status = sector_num + n; | |
1498 | } | |
1499 | ||
1500 | n = MIN(n, s->sector_next_status - sector_num); | |
1501 | if (s->status == BLK_DATA) { | |
1502 | n = MIN(n, s->buf_sectors); | |
1503 | } | |
1504 | ||
1505 | /* We need to write complete clusters for compressed images, so if an | |
1506 | * unallocated area is shorter than that, we must consider the whole | |
1507 | * cluster allocated. */ | |
1508 | if (s->compressed) { | |
1509 | if (n < s->cluster_sectors) { | |
1510 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1511 | s->status = BLK_DATA; | |
1512 | } else { | |
1513 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | return n; | |
1518 | } | |
1519 | ||
1520 | static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1521 | uint8_t *buf) | |
1522 | { | |
1523 | int n; | |
1524 | int ret; | |
1525 | ||
1526 | assert(nb_sectors <= s->buf_sectors); | |
1527 | while (nb_sectors > 0) { | |
1528 | BlockBackend *blk; | |
1529 | int64_t bs_sectors; | |
1530 | ||
1531 | /* In the case of compression with multiple source files, we can get a | |
1532 | * nb_sectors that spreads into the next part. So we must be able to | |
1533 | * read across multiple BDSes for one convert_read() call. */ | |
1534 | convert_select_part(s, sector_num); | |
1535 | blk = s->src[s->src_cur]; | |
1536 | bs_sectors = s->src_sectors[s->src_cur]; | |
1537 | ||
1538 | n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); | |
1539 | ret = blk_pread(blk, | |
1540 | (sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS, | |
1541 | buf, n << BDRV_SECTOR_BITS); | |
1542 | if (ret < 0) { | |
1543 | return ret; | |
1544 | } | |
1545 | ||
1546 | sector_num += n; | |
1547 | nb_sectors -= n; | |
1548 | buf += n * BDRV_SECTOR_SIZE; | |
1549 | } | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1555 | const uint8_t *buf) | |
1556 | { | |
1557 | int ret; | |
1558 | ||
1559 | while (nb_sectors > 0) { | |
1560 | int n = nb_sectors; | |
1561 | ||
1562 | switch (s->status) { | |
1563 | case BLK_BACKING_FILE: | |
1564 | /* If we have a backing file, leave clusters unallocated that are | |
1565 | * unallocated in the source image, so that the backing file is | |
1566 | * visible at the respective offset. */ | |
1567 | assert(s->target_has_backing); | |
1568 | break; | |
1569 | ||
1570 | case BLK_DATA: | |
1571 | /* We must always write compressed clusters as a whole, so don't | |
1572 | * try to find zeroed parts in the buffer. We can only save the | |
1573 | * write if the buffer is completely zeroed and we're allowed to | |
1574 | * keep the target sparse. */ | |
1575 | if (s->compressed) { | |
1576 | if (s->has_zero_init && s->min_sparse && | |
1577 | buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) | |
1578 | { | |
1579 | assert(!s->target_has_backing); | |
1580 | break; | |
1581 | } | |
1582 | ||
1583 | ret = blk_write_compressed(s->target, sector_num, buf, n); | |
1584 | if (ret < 0) { | |
1585 | return ret; | |
1586 | } | |
1587 | break; | |
1588 | } | |
1589 | ||
1590 | /* If there is real non-zero data or we're told to keep the target | |
1591 | * fully allocated (-S 0), we must write it. Otherwise we can treat | |
1592 | * it as zero sectors. */ | |
1593 | if (!s->min_sparse || | |
1594 | is_allocated_sectors_min(buf, n, &n, s->min_sparse)) | |
1595 | { | |
1596 | ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1597 | buf, n << BDRV_SECTOR_BITS, 0); | |
1598 | if (ret < 0) { | |
1599 | return ret; | |
1600 | } | |
1601 | break; | |
1602 | } | |
1603 | /* fall-through */ | |
1604 | ||
1605 | case BLK_ZERO: | |
1606 | if (s->has_zero_init) { | |
1607 | break; | |
1608 | } | |
1609 | ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS, | |
1610 | n << BDRV_SECTOR_BITS, 0); | |
1611 | if (ret < 0) { | |
1612 | return ret; | |
1613 | } | |
1614 | break; | |
1615 | } | |
1616 | ||
1617 | sector_num += n; | |
1618 | nb_sectors -= n; | |
1619 | buf += n * BDRV_SECTOR_SIZE; | |
1620 | } | |
1621 | ||
1622 | return 0; | |
1623 | } | |
1624 | ||
1625 | static int convert_do_copy(ImgConvertState *s) | |
1626 | { | |
1627 | uint8_t *buf = NULL; | |
1628 | int64_t sector_num, allocated_done; | |
1629 | int ret; | |
1630 | int n; | |
1631 | ||
1632 | /* Check whether we have zero initialisation or can get it efficiently */ | |
1633 | s->has_zero_init = s->min_sparse && !s->target_has_backing | |
1634 | ? bdrv_has_zero_init(blk_bs(s->target)) | |
1635 | : false; | |
1636 | ||
1637 | if (!s->has_zero_init && !s->target_has_backing && | |
1638 | bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) | |
1639 | { | |
1640 | ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); | |
1641 | if (ret == 0) { | |
1642 | s->has_zero_init = true; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
1647 | * can be copied at a time. */ | |
1648 | if (s->compressed) { | |
1649 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
1650 | error_report("invalid cluster size"); | |
1651 | ret = -EINVAL; | |
1652 | goto fail; | |
1653 | } | |
1654 | s->buf_sectors = s->cluster_sectors; | |
1655 | } | |
1656 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1657 | ||
1658 | /* Calculate allocated sectors for progress */ | |
1659 | s->allocated_sectors = 0; | |
1660 | sector_num = 0; | |
1661 | while (sector_num < s->total_sectors) { | |
1662 | n = convert_iteration_sectors(s, sector_num); | |
1663 | if (n < 0) { | |
1664 | ret = n; | |
1665 | goto fail; | |
1666 | } | |
1667 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1668 | { | |
1669 | s->allocated_sectors += n; | |
1670 | } | |
1671 | sector_num += n; | |
1672 | } | |
1673 | ||
1674 | /* Do the copy */ | |
1675 | s->src_cur = 0; | |
1676 | s->src_cur_offset = 0; | |
1677 | s->sector_next_status = 0; | |
1678 | ||
1679 | sector_num = 0; | |
1680 | allocated_done = 0; | |
1681 | ||
1682 | while (sector_num < s->total_sectors) { | |
1683 | n = convert_iteration_sectors(s, sector_num); | |
1684 | if (n < 0) { | |
1685 | ret = n; | |
1686 | goto fail; | |
1687 | } | |
1688 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1689 | { | |
1690 | allocated_done += n; | |
1691 | qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, | |
1692 | 0); | |
1693 | } | |
1694 | ||
1695 | if (s->status == BLK_DATA) { | |
1696 | ret = convert_read(s, sector_num, n, buf); | |
1697 | if (ret < 0) { | |
1698 | error_report("error while reading sector %" PRId64 | |
1699 | ": %s", sector_num, strerror(-ret)); | |
1700 | goto fail; | |
1701 | } | |
1702 | } else if (!s->min_sparse && s->status == BLK_ZERO) { | |
1703 | n = MIN(n, s->buf_sectors); | |
1704 | memset(buf, 0, n * BDRV_SECTOR_SIZE); | |
1705 | s->status = BLK_DATA; | |
1706 | } | |
1707 | ||
1708 | ret = convert_write(s, sector_num, n, buf); | |
1709 | if (ret < 0) { | |
1710 | error_report("error while writing sector %" PRId64 | |
1711 | ": %s", sector_num, strerror(-ret)); | |
1712 | goto fail; | |
1713 | } | |
1714 | ||
1715 | sector_num += n; | |
1716 | } | |
1717 | ||
1718 | if (s->compressed) { | |
1719 | /* signal EOF to align */ | |
1720 | ret = blk_write_compressed(s->target, 0, NULL, 0); | |
1721 | if (ret < 0) { | |
1722 | goto fail; | |
1723 | } | |
1724 | } | |
1725 | ||
1726 | ret = 0; | |
1727 | fail: | |
1728 | qemu_vfree(buf); | |
1729 | return ret; | |
1730 | } | |
1731 | ||
1732 | static int img_convert(int argc, char **argv) | |
1733 | { | |
1734 | int c, bs_n, bs_i, compress, cluster_sectors, skip_create; | |
1735 | int64_t ret = 0; | |
1736 | int progress = 0, flags, src_flags; | |
1737 | bool writethrough, src_writethrough; | |
1738 | const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; | |
1739 | BlockDriver *drv, *proto_drv; | |
1740 | BlockBackend **blk = NULL, *out_blk = NULL; | |
1741 | BlockDriverState **bs = NULL, *out_bs = NULL; | |
1742 | int64_t total_sectors; | |
1743 | int64_t *bs_sectors = NULL; | |
1744 | size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; | |
1745 | BlockDriverInfo bdi; | |
1746 | QemuOpts *opts = NULL; | |
1747 | QemuOptsList *create_opts = NULL; | |
1748 | const char *out_baseimg_param; | |
1749 | char *options = NULL; | |
1750 | const char *snapshot_name = NULL; | |
1751 | int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ | |
1752 | bool quiet = false; | |
1753 | Error *local_err = NULL; | |
1754 | QemuOpts *sn_opts = NULL; | |
1755 | ImgConvertState state; | |
1756 | bool image_opts = false; | |
1757 | ||
1758 | fmt = NULL; | |
1759 | out_fmt = "raw"; | |
1760 | cache = "unsafe"; | |
1761 | src_cache = BDRV_DEFAULT_CACHE; | |
1762 | out_baseimg = NULL; | |
1763 | compress = 0; | |
1764 | skip_create = 0; | |
1765 | for(;;) { | |
1766 | static const struct option long_options[] = { | |
1767 | {"help", no_argument, 0, 'h'}, | |
1768 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1769 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1770 | {0, 0, 0, 0} | |
1771 | }; | |
1772 | c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn", | |
1773 | long_options, NULL); | |
1774 | if (c == -1) { | |
1775 | break; | |
1776 | } | |
1777 | switch(c) { | |
1778 | case '?': | |
1779 | case 'h': | |
1780 | help(); | |
1781 | break; | |
1782 | case 'f': | |
1783 | fmt = optarg; | |
1784 | break; | |
1785 | case 'O': | |
1786 | out_fmt = optarg; | |
1787 | break; | |
1788 | case 'B': | |
1789 | out_baseimg = optarg; | |
1790 | break; | |
1791 | case 'c': | |
1792 | compress = 1; | |
1793 | break; | |
1794 | case 'e': | |
1795 | error_report("option -e is deprecated, please use \'-o " | |
1796 | "encryption\' instead!"); | |
1797 | ret = -1; | |
1798 | goto fail_getopt; | |
1799 | case '6': | |
1800 | error_report("option -6 is deprecated, please use \'-o " | |
1801 | "compat6\' instead!"); | |
1802 | ret = -1; | |
1803 | goto fail_getopt; | |
1804 | case 'o': | |
1805 | if (!is_valid_option_list(optarg)) { | |
1806 | error_report("Invalid option list: %s", optarg); | |
1807 | ret = -1; | |
1808 | goto fail_getopt; | |
1809 | } | |
1810 | if (!options) { | |
1811 | options = g_strdup(optarg); | |
1812 | } else { | |
1813 | char *old_options = options; | |
1814 | options = g_strdup_printf("%s,%s", options, optarg); | |
1815 | g_free(old_options); | |
1816 | } | |
1817 | break; | |
1818 | case 's': | |
1819 | snapshot_name = optarg; | |
1820 | break; | |
1821 | case 'l': | |
1822 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
1823 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
1824 | optarg, false); | |
1825 | if (!sn_opts) { | |
1826 | error_report("Failed in parsing snapshot param '%s'", | |
1827 | optarg); | |
1828 | ret = -1; | |
1829 | goto fail_getopt; | |
1830 | } | |
1831 | } else { | |
1832 | snapshot_name = optarg; | |
1833 | } | |
1834 | break; | |
1835 | case 'S': | |
1836 | { | |
1837 | int64_t sval; | |
1838 | char *end; | |
1839 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
1840 | if (sval < 0 || *end) { | |
1841 | error_report("Invalid minimum zero buffer size for sparse output specified"); | |
1842 | ret = -1; | |
1843 | goto fail_getopt; | |
1844 | } | |
1845 | ||
1846 | min_sparse = sval / BDRV_SECTOR_SIZE; | |
1847 | break; | |
1848 | } | |
1849 | case 'p': | |
1850 | progress = 1; | |
1851 | break; | |
1852 | case 't': | |
1853 | cache = optarg; | |
1854 | break; | |
1855 | case 'T': | |
1856 | src_cache = optarg; | |
1857 | break; | |
1858 | case 'q': | |
1859 | quiet = true; | |
1860 | break; | |
1861 | case 'n': | |
1862 | skip_create = 1; | |
1863 | break; | |
1864 | case OPTION_OBJECT: | |
1865 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1866 | optarg, true); | |
1867 | if (!opts) { | |
1868 | goto fail_getopt; | |
1869 | } | |
1870 | break; | |
1871 | case OPTION_IMAGE_OPTS: | |
1872 | image_opts = true; | |
1873 | break; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | if (qemu_opts_foreach(&qemu_object_opts, | |
1878 | user_creatable_add_opts_foreach, | |
1879 | NULL, NULL)) { | |
1880 | goto fail_getopt; | |
1881 | } | |
1882 | ||
1883 | /* Initialize before goto out */ | |
1884 | if (quiet) { | |
1885 | progress = 0; | |
1886 | } | |
1887 | qemu_progress_init(progress, 1.0); | |
1888 | ||
1889 | bs_n = argc - optind - 1; | |
1890 | out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; | |
1891 | ||
1892 | if (options && has_help_option(options)) { | |
1893 | ret = print_block_option_help(out_filename, out_fmt); | |
1894 | goto out; | |
1895 | } | |
1896 | ||
1897 | if (bs_n < 1) { | |
1898 | error_exit("Must specify image file name"); | |
1899 | } | |
1900 | ||
1901 | ||
1902 | if (bs_n > 1 && out_baseimg) { | |
1903 | error_report("-B makes no sense when concatenating multiple input " | |
1904 | "images"); | |
1905 | ret = -1; | |
1906 | goto out; | |
1907 | } | |
1908 | ||
1909 | src_flags = 0; | |
1910 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
1911 | if (ret < 0) { | |
1912 | error_report("Invalid source cache option: %s", src_cache); | |
1913 | goto out; | |
1914 | } | |
1915 | ||
1916 | qemu_progress_print(0, 100); | |
1917 | ||
1918 | blk = g_new0(BlockBackend *, bs_n); | |
1919 | bs = g_new0(BlockDriverState *, bs_n); | |
1920 | bs_sectors = g_new(int64_t, bs_n); | |
1921 | ||
1922 | total_sectors = 0; | |
1923 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
1924 | blk[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
1925 | fmt, src_flags, src_writethrough, quiet); | |
1926 | if (!blk[bs_i]) { | |
1927 | ret = -1; | |
1928 | goto out; | |
1929 | } | |
1930 | bs[bs_i] = blk_bs(blk[bs_i]); | |
1931 | bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); | |
1932 | if (bs_sectors[bs_i] < 0) { | |
1933 | error_report("Could not get size of %s: %s", | |
1934 | argv[optind + bs_i], strerror(-bs_sectors[bs_i])); | |
1935 | ret = -1; | |
1936 | goto out; | |
1937 | } | |
1938 | total_sectors += bs_sectors[bs_i]; | |
1939 | } | |
1940 | ||
1941 | if (sn_opts) { | |
1942 | ret = bdrv_snapshot_load_tmp(bs[0], | |
1943 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
1944 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
1945 | &local_err); | |
1946 | } else if (snapshot_name != NULL) { | |
1947 | if (bs_n > 1) { | |
1948 | error_report("No support for concatenating multiple snapshot"); | |
1949 | ret = -1; | |
1950 | goto out; | |
1951 | } | |
1952 | ||
1953 | bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); | |
1954 | } | |
1955 | if (local_err) { | |
1956 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
1957 | ret = -1; | |
1958 | goto out; | |
1959 | } | |
1960 | ||
1961 | /* Find driver and parse its options */ | |
1962 | drv = bdrv_find_format(out_fmt); | |
1963 | if (!drv) { | |
1964 | error_report("Unknown file format '%s'", out_fmt); | |
1965 | ret = -1; | |
1966 | goto out; | |
1967 | } | |
1968 | ||
1969 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
1970 | if (!proto_drv) { | |
1971 | error_report_err(local_err); | |
1972 | ret = -1; | |
1973 | goto out; | |
1974 | } | |
1975 | ||
1976 | if (!skip_create) { | |
1977 | if (!drv->create_opts) { | |
1978 | error_report("Format driver '%s' does not support image creation", | |
1979 | drv->format_name); | |
1980 | ret = -1; | |
1981 | goto out; | |
1982 | } | |
1983 | ||
1984 | if (!proto_drv->create_opts) { | |
1985 | error_report("Protocol driver '%s' does not support image creation", | |
1986 | proto_drv->format_name); | |
1987 | ret = -1; | |
1988 | goto out; | |
1989 | } | |
1990 | ||
1991 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
1992 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
1993 | ||
1994 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
1995 | if (options) { | |
1996 | qemu_opts_do_parse(opts, options, NULL, &local_err); | |
1997 | if (local_err) { | |
1998 | error_report_err(local_err); | |
1999 | ret = -1; | |
2000 | goto out; | |
2001 | } | |
2002 | } | |
2003 | ||
2004 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, | |
2005 | &error_abort); | |
2006 | ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); | |
2007 | if (ret < 0) { | |
2008 | goto out; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | /* Get backing file name if -o backing_file was used */ | |
2013 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2014 | if (out_baseimg_param) { | |
2015 | out_baseimg = out_baseimg_param; | |
2016 | } | |
2017 | ||
2018 | /* Check if compression is supported */ | |
2019 | if (compress) { | |
2020 | bool encryption = | |
2021 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2022 | const char *preallocation = | |
2023 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2024 | ||
2025 | if (!drv->bdrv_write_compressed) { | |
2026 | error_report("Compression not supported for this file format"); | |
2027 | ret = -1; | |
2028 | goto out; | |
2029 | } | |
2030 | ||
2031 | if (encryption) { | |
2032 | error_report("Compression and encryption not supported at " | |
2033 | "the same time"); | |
2034 | ret = -1; | |
2035 | goto out; | |
2036 | } | |
2037 | ||
2038 | if (preallocation | |
2039 | && strcmp(preallocation, "off")) | |
2040 | { | |
2041 | error_report("Compression and preallocation not supported at " | |
2042 | "the same time"); | |
2043 | ret = -1; | |
2044 | goto out; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | if (!skip_create) { | |
2049 | /* Create the new image */ | |
2050 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2051 | if (ret < 0) { | |
2052 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2053 | out_filename, out_fmt); | |
2054 | goto out; | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2059 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2060 | if (ret < 0) { | |
2061 | error_report("Invalid cache option: %s", cache); | |
2062 | goto out; | |
2063 | } | |
2064 | ||
2065 | /* XXX we should allow --image-opts to trigger use of | |
2066 | * img_open() here, but then we have trouble with | |
2067 | * the bdrv_create() call which takes different params. | |
2068 | * Not critical right now, so fix can wait... | |
2069 | */ | |
2070 | out_blk = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); | |
2071 | if (!out_blk) { | |
2072 | ret = -1; | |
2073 | goto out; | |
2074 | } | |
2075 | out_bs = blk_bs(out_blk); | |
2076 | ||
2077 | /* increase bufsectors from the default 4096 (2M) if opt_transfer_length | |
2078 | * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) | |
2079 | * as maximum. */ | |
2080 | bufsectors = MIN(32768, | |
2081 | MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, | |
2082 | out_bs->bl.discard_alignment)) | |
2083 | ); | |
2084 | ||
2085 | if (skip_create) { | |
2086 | int64_t output_sectors = blk_nb_sectors(out_blk); | |
2087 | if (output_sectors < 0) { | |
2088 | error_report("unable to get output image length: %s", | |
2089 | strerror(-output_sectors)); | |
2090 | ret = -1; | |
2091 | goto out; | |
2092 | } else if (output_sectors < total_sectors) { | |
2093 | error_report("output file is smaller than input file"); | |
2094 | ret = -1; | |
2095 | goto out; | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | cluster_sectors = 0; | |
2100 | ret = bdrv_get_info(out_bs, &bdi); | |
2101 | if (ret < 0) { | |
2102 | if (compress) { | |
2103 | error_report("could not get block driver info"); | |
2104 | goto out; | |
2105 | } | |
2106 | } else { | |
2107 | compress = compress || bdi.needs_compressed_writes; | |
2108 | cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2109 | } | |
2110 | ||
2111 | state = (ImgConvertState) { | |
2112 | .src = blk, | |
2113 | .src_sectors = bs_sectors, | |
2114 | .src_num = bs_n, | |
2115 | .total_sectors = total_sectors, | |
2116 | .target = out_blk, | |
2117 | .compressed = compress, | |
2118 | .target_has_backing = (bool) out_baseimg, | |
2119 | .min_sparse = min_sparse, | |
2120 | .cluster_sectors = cluster_sectors, | |
2121 | .buf_sectors = bufsectors, | |
2122 | }; | |
2123 | ret = convert_do_copy(&state); | |
2124 | ||
2125 | out: | |
2126 | if (!ret) { | |
2127 | qemu_progress_print(100, 0); | |
2128 | } | |
2129 | qemu_progress_end(); | |
2130 | qemu_opts_del(opts); | |
2131 | qemu_opts_free(create_opts); | |
2132 | qemu_opts_del(sn_opts); | |
2133 | blk_unref(out_blk); | |
2134 | g_free(bs); | |
2135 | if (blk) { | |
2136 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
2137 | blk_unref(blk[bs_i]); | |
2138 | } | |
2139 | g_free(blk); | |
2140 | } | |
2141 | g_free(bs_sectors); | |
2142 | fail_getopt: | |
2143 | g_free(options); | |
2144 | ||
2145 | if (ret) { | |
2146 | return 1; | |
2147 | } | |
2148 | return 0; | |
2149 | } | |
2150 | ||
2151 | ||
2152 | static void dump_snapshots(BlockDriverState *bs) | |
2153 | { | |
2154 | QEMUSnapshotInfo *sn_tab, *sn; | |
2155 | int nb_sns, i; | |
2156 | ||
2157 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2158 | if (nb_sns <= 0) | |
2159 | return; | |
2160 | printf("Snapshot list:\n"); | |
2161 | bdrv_snapshot_dump(fprintf, stdout, NULL); | |
2162 | printf("\n"); | |
2163 | for(i = 0; i < nb_sns; i++) { | |
2164 | sn = &sn_tab[i]; | |
2165 | bdrv_snapshot_dump(fprintf, stdout, sn); | |
2166 | printf("\n"); | |
2167 | } | |
2168 | g_free(sn_tab); | |
2169 | } | |
2170 | ||
2171 | static void dump_json_image_info_list(ImageInfoList *list) | |
2172 | { | |
2173 | Error *local_err = NULL; | |
2174 | QString *str; | |
2175 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
2176 | QObject *obj; | |
2177 | visit_type_ImageInfoList(qmp_output_get_visitor(ov), NULL, &list, | |
2178 | &local_err); | |
2179 | obj = qmp_output_get_qobject(ov); | |
2180 | str = qobject_to_json_pretty(obj); | |
2181 | assert(str != NULL); | |
2182 | printf("%s\n", qstring_get_str(str)); | |
2183 | qobject_decref(obj); | |
2184 | qmp_output_visitor_cleanup(ov); | |
2185 | QDECREF(str); | |
2186 | } | |
2187 | ||
2188 | static void dump_json_image_info(ImageInfo *info) | |
2189 | { | |
2190 | Error *local_err = NULL; | |
2191 | QString *str; | |
2192 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
2193 | QObject *obj; | |
2194 | visit_type_ImageInfo(qmp_output_get_visitor(ov), NULL, &info, &local_err); | |
2195 | obj = qmp_output_get_qobject(ov); | |
2196 | str = qobject_to_json_pretty(obj); | |
2197 | assert(str != NULL); | |
2198 | printf("%s\n", qstring_get_str(str)); | |
2199 | qobject_decref(obj); | |
2200 | qmp_output_visitor_cleanup(ov); | |
2201 | QDECREF(str); | |
2202 | } | |
2203 | ||
2204 | static void dump_human_image_info_list(ImageInfoList *list) | |
2205 | { | |
2206 | ImageInfoList *elem; | |
2207 | bool delim = false; | |
2208 | ||
2209 | for (elem = list; elem; elem = elem->next) { | |
2210 | if (delim) { | |
2211 | printf("\n"); | |
2212 | } | |
2213 | delim = true; | |
2214 | ||
2215 | bdrv_image_info_dump(fprintf, stdout, elem->value); | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2220 | { | |
2221 | return strcmp(a, b) == 0; | |
2222 | } | |
2223 | ||
2224 | /** | |
2225 | * Open an image file chain and return an ImageInfoList | |
2226 | * | |
2227 | * @filename: topmost image filename | |
2228 | * @fmt: topmost image format (may be NULL to autodetect) | |
2229 | * @chain: true - enumerate entire backing file chain | |
2230 | * false - only topmost image file | |
2231 | * | |
2232 | * Returns a list of ImageInfo objects or NULL if there was an error opening an | |
2233 | * image file. If there was an error a message will have been printed to | |
2234 | * stderr. | |
2235 | */ | |
2236 | static ImageInfoList *collect_image_info_list(bool image_opts, | |
2237 | const char *filename, | |
2238 | const char *fmt, | |
2239 | bool chain) | |
2240 | { | |
2241 | ImageInfoList *head = NULL; | |
2242 | ImageInfoList **last = &head; | |
2243 | GHashTable *filenames; | |
2244 | Error *err = NULL; | |
2245 | ||
2246 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2247 | ||
2248 | while (filename) { | |
2249 | BlockBackend *blk; | |
2250 | BlockDriverState *bs; | |
2251 | ImageInfo *info; | |
2252 | ImageInfoList *elem; | |
2253 | ||
2254 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2255 | error_report("Backing file '%s' creates an infinite loop.", | |
2256 | filename); | |
2257 | goto err; | |
2258 | } | |
2259 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2260 | ||
2261 | blk = img_open(image_opts, filename, fmt, | |
2262 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); | |
2263 | if (!blk) { | |
2264 | goto err; | |
2265 | } | |
2266 | bs = blk_bs(blk); | |
2267 | ||
2268 | bdrv_query_image_info(bs, &info, &err); | |
2269 | if (err) { | |
2270 | error_report_err(err); | |
2271 | blk_unref(blk); | |
2272 | goto err; | |
2273 | } | |
2274 | ||
2275 | elem = g_new0(ImageInfoList, 1); | |
2276 | elem->value = info; | |
2277 | *last = elem; | |
2278 | last = &elem->next; | |
2279 | ||
2280 | blk_unref(blk); | |
2281 | ||
2282 | filename = fmt = NULL; | |
2283 | if (chain) { | |
2284 | if (info->has_full_backing_filename) { | |
2285 | filename = info->full_backing_filename; | |
2286 | } else if (info->has_backing_filename) { | |
2287 | error_report("Could not determine absolute backing filename," | |
2288 | " but backing filename '%s' present", | |
2289 | info->backing_filename); | |
2290 | goto err; | |
2291 | } | |
2292 | if (info->has_backing_filename_format) { | |
2293 | fmt = info->backing_filename_format; | |
2294 | } | |
2295 | } | |
2296 | } | |
2297 | g_hash_table_destroy(filenames); | |
2298 | return head; | |
2299 | ||
2300 | err: | |
2301 | qapi_free_ImageInfoList(head); | |
2302 | g_hash_table_destroy(filenames); | |
2303 | return NULL; | |
2304 | } | |
2305 | ||
2306 | static int img_info(int argc, char **argv) | |
2307 | { | |
2308 | int c; | |
2309 | OutputFormat output_format = OFORMAT_HUMAN; | |
2310 | bool chain = false; | |
2311 | const char *filename, *fmt, *output; | |
2312 | ImageInfoList *list; | |
2313 | bool image_opts = false; | |
2314 | ||
2315 | fmt = NULL; | |
2316 | output = NULL; | |
2317 | for(;;) { | |
2318 | int option_index = 0; | |
2319 | static const struct option long_options[] = { | |
2320 | {"help", no_argument, 0, 'h'}, | |
2321 | {"format", required_argument, 0, 'f'}, | |
2322 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2323 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
2324 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2325 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2326 | {0, 0, 0, 0} | |
2327 | }; | |
2328 | c = getopt_long(argc, argv, "f:h", | |
2329 | long_options, &option_index); | |
2330 | if (c == -1) { | |
2331 | break; | |
2332 | } | |
2333 | switch(c) { | |
2334 | case '?': | |
2335 | case 'h': | |
2336 | help(); | |
2337 | break; | |
2338 | case 'f': | |
2339 | fmt = optarg; | |
2340 | break; | |
2341 | case OPTION_OUTPUT: | |
2342 | output = optarg; | |
2343 | break; | |
2344 | case OPTION_BACKING_CHAIN: | |
2345 | chain = true; | |
2346 | break; | |
2347 | case OPTION_OBJECT: { | |
2348 | QemuOpts *opts; | |
2349 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2350 | optarg, true); | |
2351 | if (!opts) { | |
2352 | return 1; | |
2353 | } | |
2354 | } break; | |
2355 | case OPTION_IMAGE_OPTS: | |
2356 | image_opts = true; | |
2357 | break; | |
2358 | } | |
2359 | } | |
2360 | if (optind != argc - 1) { | |
2361 | error_exit("Expecting one image file name"); | |
2362 | } | |
2363 | filename = argv[optind++]; | |
2364 | ||
2365 | if (output && !strcmp(output, "json")) { | |
2366 | output_format = OFORMAT_JSON; | |
2367 | } else if (output && !strcmp(output, "human")) { | |
2368 | output_format = OFORMAT_HUMAN; | |
2369 | } else if (output) { | |
2370 | error_report("--output must be used with human or json as argument."); | |
2371 | return 1; | |
2372 | } | |
2373 | ||
2374 | if (qemu_opts_foreach(&qemu_object_opts, | |
2375 | user_creatable_add_opts_foreach, | |
2376 | NULL, NULL)) { | |
2377 | return 1; | |
2378 | } | |
2379 | ||
2380 | list = collect_image_info_list(image_opts, filename, fmt, chain); | |
2381 | if (!list) { | |
2382 | return 1; | |
2383 | } | |
2384 | ||
2385 | switch (output_format) { | |
2386 | case OFORMAT_HUMAN: | |
2387 | dump_human_image_info_list(list); | |
2388 | break; | |
2389 | case OFORMAT_JSON: | |
2390 | if (chain) { | |
2391 | dump_json_image_info_list(list); | |
2392 | } else { | |
2393 | dump_json_image_info(list->value); | |
2394 | } | |
2395 | break; | |
2396 | } | |
2397 | ||
2398 | qapi_free_ImageInfoList(list); | |
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | static void dump_map_entry(OutputFormat output_format, MapEntry *e, | |
2403 | MapEntry *next) | |
2404 | { | |
2405 | switch (output_format) { | |
2406 | case OFORMAT_HUMAN: | |
2407 | if (e->data && !e->has_offset) { | |
2408 | error_report("File contains external, encrypted or compressed clusters."); | |
2409 | exit(1); | |
2410 | } | |
2411 | if (e->data && !e->zero) { | |
2412 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
2413 | e->start, e->length, | |
2414 | e->has_offset ? e->offset : 0, | |
2415 | e->has_filename ? e->filename : ""); | |
2416 | } | |
2417 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
2418 | * Modify the flags here to allow more coalescing. | |
2419 | */ | |
2420 | if (next && (!next->data || next->zero)) { | |
2421 | next->data = false; | |
2422 | next->zero = true; | |
2423 | } | |
2424 | break; | |
2425 | case OFORMAT_JSON: | |
2426 | printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
2427 | " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", | |
2428 | (e->start == 0 ? "[" : ",\n"), | |
2429 | e->start, e->length, e->depth, | |
2430 | e->zero ? "true" : "false", | |
2431 | e->data ? "true" : "false"); | |
2432 | if (e->has_offset) { | |
2433 | printf(", \"offset\": %"PRId64"", e->offset); | |
2434 | } | |
2435 | putchar('}'); | |
2436 | ||
2437 | if (!next) { | |
2438 | printf("]\n"); | |
2439 | } | |
2440 | break; | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | static int get_block_status(BlockDriverState *bs, int64_t sector_num, | |
2445 | int nb_sectors, MapEntry *e) | |
2446 | { | |
2447 | int64_t ret; | |
2448 | int depth; | |
2449 | BlockDriverState *file; | |
2450 | bool has_offset; | |
2451 | ||
2452 | /* As an optimization, we could cache the current range of unallocated | |
2453 | * clusters in each file of the chain, and avoid querying the same | |
2454 | * range repeatedly. | |
2455 | */ | |
2456 | ||
2457 | depth = 0; | |
2458 | for (;;) { | |
2459 | ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, | |
2460 | &file); | |
2461 | if (ret < 0) { | |
2462 | return ret; | |
2463 | } | |
2464 | assert(nb_sectors); | |
2465 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
2466 | break; | |
2467 | } | |
2468 | bs = backing_bs(bs); | |
2469 | if (bs == NULL) { | |
2470 | ret = 0; | |
2471 | break; | |
2472 | } | |
2473 | ||
2474 | depth++; | |
2475 | } | |
2476 | ||
2477 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
2478 | ||
2479 | *e = (MapEntry) { | |
2480 | .start = sector_num * BDRV_SECTOR_SIZE, | |
2481 | .length = nb_sectors * BDRV_SECTOR_SIZE, | |
2482 | .data = !!(ret & BDRV_BLOCK_DATA), | |
2483 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
2484 | .offset = ret & BDRV_BLOCK_OFFSET_MASK, | |
2485 | .has_offset = has_offset, | |
2486 | .depth = depth, | |
2487 | .has_filename = file && has_offset, | |
2488 | .filename = file && has_offset ? file->filename : NULL, | |
2489 | }; | |
2490 | ||
2491 | return 0; | |
2492 | } | |
2493 | ||
2494 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
2495 | { | |
2496 | if (curr->length == 0) { | |
2497 | return false; | |
2498 | } | |
2499 | if (curr->zero != next->zero || | |
2500 | curr->data != next->data || | |
2501 | curr->depth != next->depth || | |
2502 | curr->has_filename != next->has_filename || | |
2503 | curr->has_offset != next->has_offset) { | |
2504 | return false; | |
2505 | } | |
2506 | if (curr->has_filename && strcmp(curr->filename, next->filename)) { | |
2507 | return false; | |
2508 | } | |
2509 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
2510 | return false; | |
2511 | } | |
2512 | return true; | |
2513 | } | |
2514 | ||
2515 | static int img_map(int argc, char **argv) | |
2516 | { | |
2517 | int c; | |
2518 | OutputFormat output_format = OFORMAT_HUMAN; | |
2519 | BlockBackend *blk; | |
2520 | BlockDriverState *bs; | |
2521 | const char *filename, *fmt, *output; | |
2522 | int64_t length; | |
2523 | MapEntry curr = { .length = 0 }, next; | |
2524 | int ret = 0; | |
2525 | bool image_opts = false; | |
2526 | ||
2527 | fmt = NULL; | |
2528 | output = NULL; | |
2529 | for (;;) { | |
2530 | int option_index = 0; | |
2531 | static const struct option long_options[] = { | |
2532 | {"help", no_argument, 0, 'h'}, | |
2533 | {"format", required_argument, 0, 'f'}, | |
2534 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2535 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2536 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2537 | {0, 0, 0, 0} | |
2538 | }; | |
2539 | c = getopt_long(argc, argv, "f:h", | |
2540 | long_options, &option_index); | |
2541 | if (c == -1) { | |
2542 | break; | |
2543 | } | |
2544 | switch (c) { | |
2545 | case '?': | |
2546 | case 'h': | |
2547 | help(); | |
2548 | break; | |
2549 | case 'f': | |
2550 | fmt = optarg; | |
2551 | break; | |
2552 | case OPTION_OUTPUT: | |
2553 | output = optarg; | |
2554 | break; | |
2555 | case OPTION_OBJECT: { | |
2556 | QemuOpts *opts; | |
2557 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2558 | optarg, true); | |
2559 | if (!opts) { | |
2560 | return 1; | |
2561 | } | |
2562 | } break; | |
2563 | case OPTION_IMAGE_OPTS: | |
2564 | image_opts = true; | |
2565 | break; | |
2566 | } | |
2567 | } | |
2568 | if (optind != argc - 1) { | |
2569 | error_exit("Expecting one image file name"); | |
2570 | } | |
2571 | filename = argv[optind]; | |
2572 | ||
2573 | if (output && !strcmp(output, "json")) { | |
2574 | output_format = OFORMAT_JSON; | |
2575 | } else if (output && !strcmp(output, "human")) { | |
2576 | output_format = OFORMAT_HUMAN; | |
2577 | } else if (output) { | |
2578 | error_report("--output must be used with human or json as argument."); | |
2579 | return 1; | |
2580 | } | |
2581 | ||
2582 | if (qemu_opts_foreach(&qemu_object_opts, | |
2583 | user_creatable_add_opts_foreach, | |
2584 | NULL, NULL)) { | |
2585 | return 1; | |
2586 | } | |
2587 | ||
2588 | blk = img_open(image_opts, filename, fmt, 0, false, false); | |
2589 | if (!blk) { | |
2590 | return 1; | |
2591 | } | |
2592 | bs = blk_bs(blk); | |
2593 | ||
2594 | if (output_format == OFORMAT_HUMAN) { | |
2595 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
2596 | } | |
2597 | ||
2598 | length = blk_getlength(blk); | |
2599 | while (curr.start + curr.length < length) { | |
2600 | int64_t nsectors_left; | |
2601 | int64_t sector_num; | |
2602 | int n; | |
2603 | ||
2604 | sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; | |
2605 | ||
2606 | /* Probe up to 1 GiB at a time. */ | |
2607 | nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; | |
2608 | n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); | |
2609 | ret = get_block_status(bs, sector_num, n, &next); | |
2610 | ||
2611 | if (ret < 0) { | |
2612 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
2613 | goto out; | |
2614 | } | |
2615 | ||
2616 | if (entry_mergeable(&curr, &next)) { | |
2617 | curr.length += next.length; | |
2618 | continue; | |
2619 | } | |
2620 | ||
2621 | if (curr.length > 0) { | |
2622 | dump_map_entry(output_format, &curr, &next); | |
2623 | } | |
2624 | curr = next; | |
2625 | } | |
2626 | ||
2627 | dump_map_entry(output_format, &curr, NULL); | |
2628 | ||
2629 | out: | |
2630 | blk_unref(blk); | |
2631 | return ret < 0; | |
2632 | } | |
2633 | ||
2634 | #define SNAPSHOT_LIST 1 | |
2635 | #define SNAPSHOT_CREATE 2 | |
2636 | #define SNAPSHOT_APPLY 3 | |
2637 | #define SNAPSHOT_DELETE 4 | |
2638 | ||
2639 | static int img_snapshot(int argc, char **argv) | |
2640 | { | |
2641 | BlockBackend *blk; | |
2642 | BlockDriverState *bs; | |
2643 | QEMUSnapshotInfo sn; | |
2644 | char *filename, *snapshot_name = NULL; | |
2645 | int c, ret = 0, bdrv_oflags; | |
2646 | int action = 0; | |
2647 | qemu_timeval tv; | |
2648 | bool quiet = false; | |
2649 | Error *err = NULL; | |
2650 | bool image_opts = false; | |
2651 | ||
2652 | bdrv_oflags = BDRV_O_RDWR; | |
2653 | /* Parse commandline parameters */ | |
2654 | for(;;) { | |
2655 | static const struct option long_options[] = { | |
2656 | {"help", no_argument, 0, 'h'}, | |
2657 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2658 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2659 | {0, 0, 0, 0} | |
2660 | }; | |
2661 | c = getopt_long(argc, argv, "la:c:d:hq", | |
2662 | long_options, NULL); | |
2663 | if (c == -1) { | |
2664 | break; | |
2665 | } | |
2666 | switch(c) { | |
2667 | case '?': | |
2668 | case 'h': | |
2669 | help(); | |
2670 | return 0; | |
2671 | case 'l': | |
2672 | if (action) { | |
2673 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2674 | return 0; | |
2675 | } | |
2676 | action = SNAPSHOT_LIST; | |
2677 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
2678 | break; | |
2679 | case 'a': | |
2680 | if (action) { | |
2681 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2682 | return 0; | |
2683 | } | |
2684 | action = SNAPSHOT_APPLY; | |
2685 | snapshot_name = optarg; | |
2686 | break; | |
2687 | case 'c': | |
2688 | if (action) { | |
2689 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2690 | return 0; | |
2691 | } | |
2692 | action = SNAPSHOT_CREATE; | |
2693 | snapshot_name = optarg; | |
2694 | break; | |
2695 | case 'd': | |
2696 | if (action) { | |
2697 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2698 | return 0; | |
2699 | } | |
2700 | action = SNAPSHOT_DELETE; | |
2701 | snapshot_name = optarg; | |
2702 | break; | |
2703 | case 'q': | |
2704 | quiet = true; | |
2705 | break; | |
2706 | case OPTION_OBJECT: { | |
2707 | QemuOpts *opts; | |
2708 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2709 | optarg, true); | |
2710 | if (!opts) { | |
2711 | return 1; | |
2712 | } | |
2713 | } break; | |
2714 | case OPTION_IMAGE_OPTS: | |
2715 | image_opts = true; | |
2716 | break; | |
2717 | } | |
2718 | } | |
2719 | ||
2720 | if (optind != argc - 1) { | |
2721 | error_exit("Expecting one image file name"); | |
2722 | } | |
2723 | filename = argv[optind++]; | |
2724 | ||
2725 | if (qemu_opts_foreach(&qemu_object_opts, | |
2726 | user_creatable_add_opts_foreach, | |
2727 | NULL, NULL)) { | |
2728 | return 1; | |
2729 | } | |
2730 | ||
2731 | /* Open the image */ | |
2732 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); | |
2733 | if (!blk) { | |
2734 | return 1; | |
2735 | } | |
2736 | bs = blk_bs(blk); | |
2737 | ||
2738 | /* Perform the requested action */ | |
2739 | switch(action) { | |
2740 | case SNAPSHOT_LIST: | |
2741 | dump_snapshots(bs); | |
2742 | break; | |
2743 | ||
2744 | case SNAPSHOT_CREATE: | |
2745 | memset(&sn, 0, sizeof(sn)); | |
2746 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
2747 | ||
2748 | qemu_gettimeofday(&tv); | |
2749 | sn.date_sec = tv.tv_sec; | |
2750 | sn.date_nsec = tv.tv_usec * 1000; | |
2751 | ||
2752 | ret = bdrv_snapshot_create(bs, &sn); | |
2753 | if (ret) { | |
2754 | error_report("Could not create snapshot '%s': %d (%s)", | |
2755 | snapshot_name, ret, strerror(-ret)); | |
2756 | } | |
2757 | break; | |
2758 | ||
2759 | case SNAPSHOT_APPLY: | |
2760 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
2761 | if (ret) { | |
2762 | error_report("Could not apply snapshot '%s': %d (%s)", | |
2763 | snapshot_name, ret, strerror(-ret)); | |
2764 | } | |
2765 | break; | |
2766 | ||
2767 | case SNAPSHOT_DELETE: | |
2768 | bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); | |
2769 | if (err) { | |
2770 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
2771 | snapshot_name); | |
2772 | ret = 1; | |
2773 | } | |
2774 | break; | |
2775 | } | |
2776 | ||
2777 | /* Cleanup */ | |
2778 | blk_unref(blk); | |
2779 | if (ret) { | |
2780 | return 1; | |
2781 | } | |
2782 | return 0; | |
2783 | } | |
2784 | ||
2785 | static int img_rebase(int argc, char **argv) | |
2786 | { | |
2787 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
2788 | uint8_t *buf_old = NULL; | |
2789 | uint8_t *buf_new = NULL; | |
2790 | BlockDriverState *bs = NULL; | |
2791 | char *filename; | |
2792 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
2793 | int c, flags, src_flags, ret; | |
2794 | bool writethrough, src_writethrough; | |
2795 | int unsafe = 0; | |
2796 | int progress = 0; | |
2797 | bool quiet = false; | |
2798 | Error *local_err = NULL; | |
2799 | bool image_opts = false; | |
2800 | ||
2801 | /* Parse commandline parameters */ | |
2802 | fmt = NULL; | |
2803 | cache = BDRV_DEFAULT_CACHE; | |
2804 | src_cache = BDRV_DEFAULT_CACHE; | |
2805 | out_baseimg = NULL; | |
2806 | out_basefmt = NULL; | |
2807 | for(;;) { | |
2808 | static const struct option long_options[] = { | |
2809 | {"help", no_argument, 0, 'h'}, | |
2810 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2811 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2812 | {0, 0, 0, 0} | |
2813 | }; | |
2814 | c = getopt_long(argc, argv, "hf:F:b:upt:T:q", | |
2815 | long_options, NULL); | |
2816 | if (c == -1) { | |
2817 | break; | |
2818 | } | |
2819 | switch(c) { | |
2820 | case '?': | |
2821 | case 'h': | |
2822 | help(); | |
2823 | return 0; | |
2824 | case 'f': | |
2825 | fmt = optarg; | |
2826 | break; | |
2827 | case 'F': | |
2828 | out_basefmt = optarg; | |
2829 | break; | |
2830 | case 'b': | |
2831 | out_baseimg = optarg; | |
2832 | break; | |
2833 | case 'u': | |
2834 | unsafe = 1; | |
2835 | break; | |
2836 | case 'p': | |
2837 | progress = 1; | |
2838 | break; | |
2839 | case 't': | |
2840 | cache = optarg; | |
2841 | break; | |
2842 | case 'T': | |
2843 | src_cache = optarg; | |
2844 | break; | |
2845 | case 'q': | |
2846 | quiet = true; | |
2847 | break; | |
2848 | case OPTION_OBJECT: { | |
2849 | QemuOpts *opts; | |
2850 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2851 | optarg, true); | |
2852 | if (!opts) { | |
2853 | return 1; | |
2854 | } | |
2855 | } break; | |
2856 | case OPTION_IMAGE_OPTS: | |
2857 | image_opts = true; | |
2858 | break; | |
2859 | } | |
2860 | } | |
2861 | ||
2862 | if (quiet) { | |
2863 | progress = 0; | |
2864 | } | |
2865 | ||
2866 | if (optind != argc - 1) { | |
2867 | error_exit("Expecting one image file name"); | |
2868 | } | |
2869 | if (!unsafe && !out_baseimg) { | |
2870 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
2871 | } | |
2872 | filename = argv[optind++]; | |
2873 | ||
2874 | if (qemu_opts_foreach(&qemu_object_opts, | |
2875 | user_creatable_add_opts_foreach, | |
2876 | NULL, NULL)) { | |
2877 | return 1; | |
2878 | } | |
2879 | ||
2880 | qemu_progress_init(progress, 2.0); | |
2881 | qemu_progress_print(0, 100); | |
2882 | ||
2883 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
2884 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2885 | if (ret < 0) { | |
2886 | error_report("Invalid cache option: %s", cache); | |
2887 | goto out; | |
2888 | } | |
2889 | ||
2890 | src_flags = 0; | |
2891 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2892 | if (ret < 0) { | |
2893 | error_report("Invalid source cache option: %s", src_cache); | |
2894 | goto out; | |
2895 | } | |
2896 | ||
2897 | /* The source files are opened read-only, don't care about WCE */ | |
2898 | assert((src_flags & BDRV_O_RDWR) == 0); | |
2899 | (void) src_writethrough; | |
2900 | ||
2901 | /* | |
2902 | * Open the images. | |
2903 | * | |
2904 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
2905 | * the reference to a renamed or moved backing file. | |
2906 | */ | |
2907 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
2908 | if (!blk) { | |
2909 | ret = -1; | |
2910 | goto out; | |
2911 | } | |
2912 | bs = blk_bs(blk); | |
2913 | ||
2914 | if (out_basefmt != NULL) { | |
2915 | if (bdrv_find_format(out_basefmt) == NULL) { | |
2916 | error_report("Invalid format name: '%s'", out_basefmt); | |
2917 | ret = -1; | |
2918 | goto out; | |
2919 | } | |
2920 | } | |
2921 | ||
2922 | /* For safe rebasing we need to compare old and new backing file */ | |
2923 | if (!unsafe) { | |
2924 | char backing_name[PATH_MAX]; | |
2925 | QDict *options = NULL; | |
2926 | ||
2927 | if (bs->backing_format[0] != '\0') { | |
2928 | options = qdict_new(); | |
2929 | qdict_put(options, "driver", qstring_from_str(bs->backing_format)); | |
2930 | } | |
2931 | ||
2932 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
2933 | blk_old_backing = blk_new_open(backing_name, NULL, | |
2934 | options, src_flags, &local_err); | |
2935 | if (!blk_old_backing) { | |
2936 | error_reportf_err(local_err, | |
2937 | "Could not open old backing file '%s': ", | |
2938 | backing_name); | |
2939 | goto out; | |
2940 | } | |
2941 | ||
2942 | if (out_baseimg[0]) { | |
2943 | if (out_basefmt) { | |
2944 | options = qdict_new(); | |
2945 | qdict_put(options, "driver", qstring_from_str(out_basefmt)); | |
2946 | } else { | |
2947 | options = NULL; | |
2948 | } | |
2949 | ||
2950 | blk_new_backing = blk_new_open(out_baseimg, NULL, | |
2951 | options, src_flags, &local_err); | |
2952 | if (!blk_new_backing) { | |
2953 | error_reportf_err(local_err, | |
2954 | "Could not open new backing file '%s': ", | |
2955 | out_baseimg); | |
2956 | goto out; | |
2957 | } | |
2958 | } | |
2959 | } | |
2960 | ||
2961 | /* | |
2962 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
2963 | * accesses go to the backing file. We must therefore compare this cluster | |
2964 | * in the old and new backing file, and if they differ we need to copy it | |
2965 | * from the old backing file into the COW file. | |
2966 | * | |
2967 | * If qemu-img crashes during this step, no harm is done. The content of | |
2968 | * the image is the same as the original one at any time. | |
2969 | */ | |
2970 | if (!unsafe) { | |
2971 | int64_t num_sectors; | |
2972 | int64_t old_backing_num_sectors; | |
2973 | int64_t new_backing_num_sectors = 0; | |
2974 | uint64_t sector; | |
2975 | int n; | |
2976 | float local_progress = 0; | |
2977 | ||
2978 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
2979 | buf_new = blk_blockalign(blk, IO_BUF_SIZE); | |
2980 | ||
2981 | num_sectors = blk_nb_sectors(blk); | |
2982 | if (num_sectors < 0) { | |
2983 | error_report("Could not get size of '%s': %s", | |
2984 | filename, strerror(-num_sectors)); | |
2985 | ret = -1; | |
2986 | goto out; | |
2987 | } | |
2988 | old_backing_num_sectors = blk_nb_sectors(blk_old_backing); | |
2989 | if (old_backing_num_sectors < 0) { | |
2990 | char backing_name[PATH_MAX]; | |
2991 | ||
2992 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
2993 | error_report("Could not get size of '%s': %s", | |
2994 | backing_name, strerror(-old_backing_num_sectors)); | |
2995 | ret = -1; | |
2996 | goto out; | |
2997 | } | |
2998 | if (blk_new_backing) { | |
2999 | new_backing_num_sectors = blk_nb_sectors(blk_new_backing); | |
3000 | if (new_backing_num_sectors < 0) { | |
3001 | error_report("Could not get size of '%s': %s", | |
3002 | out_baseimg, strerror(-new_backing_num_sectors)); | |
3003 | ret = -1; | |
3004 | goto out; | |
3005 | } | |
3006 | } | |
3007 | ||
3008 | if (num_sectors != 0) { | |
3009 | local_progress = (float)100 / | |
3010 | (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); | |
3011 | } | |
3012 | ||
3013 | for (sector = 0; sector < num_sectors; sector += n) { | |
3014 | ||
3015 | /* How many sectors can we handle with the next read? */ | |
3016 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
3017 | n = (IO_BUF_SIZE / 512); | |
3018 | } else { | |
3019 | n = num_sectors - sector; | |
3020 | } | |
3021 | ||
3022 | /* If the cluster is allocated, we don't need to take action */ | |
3023 | ret = bdrv_is_allocated(bs, sector, n, &n); | |
3024 | if (ret < 0) { | |
3025 | error_report("error while reading image metadata: %s", | |
3026 | strerror(-ret)); | |
3027 | goto out; | |
3028 | } | |
3029 | if (ret) { | |
3030 | continue; | |
3031 | } | |
3032 | ||
3033 | /* | |
3034 | * Read old and new backing file and take into consideration that | |
3035 | * backing files may be smaller than the COW image. | |
3036 | */ | |
3037 | if (sector >= old_backing_num_sectors) { | |
3038 | memset(buf_old, 0, n * BDRV_SECTOR_SIZE); | |
3039 | } else { | |
3040 | if (sector + n > old_backing_num_sectors) { | |
3041 | n = old_backing_num_sectors - sector; | |
3042 | } | |
3043 | ||
3044 | ret = blk_pread(blk_old_backing, sector << BDRV_SECTOR_BITS, | |
3045 | buf_old, n << BDRV_SECTOR_BITS); | |
3046 | if (ret < 0) { | |
3047 | error_report("error while reading from old backing file"); | |
3048 | goto out; | |
3049 | } | |
3050 | } | |
3051 | ||
3052 | if (sector >= new_backing_num_sectors || !blk_new_backing) { | |
3053 | memset(buf_new, 0, n * BDRV_SECTOR_SIZE); | |
3054 | } else { | |
3055 | if (sector + n > new_backing_num_sectors) { | |
3056 | n = new_backing_num_sectors - sector; | |
3057 | } | |
3058 | ||
3059 | ret = blk_pread(blk_new_backing, sector << BDRV_SECTOR_BITS, | |
3060 | buf_new, n << BDRV_SECTOR_BITS); | |
3061 | if (ret < 0) { | |
3062 | error_report("error while reading from new backing file"); | |
3063 | goto out; | |
3064 | } | |
3065 | } | |
3066 | ||
3067 | /* If they differ, we need to write to the COW file */ | |
3068 | uint64_t written = 0; | |
3069 | ||
3070 | while (written < n) { | |
3071 | int pnum; | |
3072 | ||
3073 | if (compare_sectors(buf_old + written * 512, | |
3074 | buf_new + written * 512, n - written, &pnum)) | |
3075 | { | |
3076 | ret = blk_pwrite(blk, | |
3077 | (sector + written) << BDRV_SECTOR_BITS, | |
3078 | buf_old + written * 512, | |
3079 | pnum << BDRV_SECTOR_BITS, 0); | |
3080 | if (ret < 0) { | |
3081 | error_report("Error while writing to COW image: %s", | |
3082 | strerror(-ret)); | |
3083 | goto out; | |
3084 | } | |
3085 | } | |
3086 | ||
3087 | written += pnum; | |
3088 | } | |
3089 | qemu_progress_print(local_progress, 100); | |
3090 | } | |
3091 | } | |
3092 | ||
3093 | /* | |
3094 | * Change the backing file. All clusters that are different from the old | |
3095 | * backing file are overwritten in the COW file now, so the visible content | |
3096 | * doesn't change when we switch the backing file. | |
3097 | */ | |
3098 | if (out_baseimg && *out_baseimg) { | |
3099 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
3100 | } else { | |
3101 | ret = bdrv_change_backing_file(bs, NULL, NULL); | |
3102 | } | |
3103 | ||
3104 | if (ret == -ENOSPC) { | |
3105 | error_report("Could not change the backing file to '%s': No " | |
3106 | "space left in the file header", out_baseimg); | |
3107 | } else if (ret < 0) { | |
3108 | error_report("Could not change the backing file to '%s': %s", | |
3109 | out_baseimg, strerror(-ret)); | |
3110 | } | |
3111 | ||
3112 | qemu_progress_print(100, 0); | |
3113 | /* | |
3114 | * TODO At this point it is possible to check if any clusters that are | |
3115 | * allocated in the COW file are the same in the backing file. If so, they | |
3116 | * could be dropped from the COW file. Don't do this before switching the | |
3117 | * backing file, in case of a crash this would lead to corruption. | |
3118 | */ | |
3119 | out: | |
3120 | qemu_progress_end(); | |
3121 | /* Cleanup */ | |
3122 | if (!unsafe) { | |
3123 | blk_unref(blk_old_backing); | |
3124 | blk_unref(blk_new_backing); | |
3125 | } | |
3126 | qemu_vfree(buf_old); | |
3127 | qemu_vfree(buf_new); | |
3128 | ||
3129 | blk_unref(blk); | |
3130 | if (ret) { | |
3131 | return 1; | |
3132 | } | |
3133 | return 0; | |
3134 | } | |
3135 | ||
3136 | static int img_resize(int argc, char **argv) | |
3137 | { | |
3138 | Error *err = NULL; | |
3139 | int c, ret, relative; | |
3140 | const char *filename, *fmt, *size; | |
3141 | int64_t n, total_size; | |
3142 | bool quiet = false; | |
3143 | BlockBackend *blk = NULL; | |
3144 | QemuOpts *param; | |
3145 | ||
3146 | static QemuOptsList resize_options = { | |
3147 | .name = "resize_options", | |
3148 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
3149 | .desc = { | |
3150 | { | |
3151 | .name = BLOCK_OPT_SIZE, | |
3152 | .type = QEMU_OPT_SIZE, | |
3153 | .help = "Virtual disk size" | |
3154 | }, { | |
3155 | /* end of list */ | |
3156 | } | |
3157 | }, | |
3158 | }; | |
3159 | bool image_opts = false; | |
3160 | ||
3161 | /* Remove size from argv manually so that negative numbers are not treated | |
3162 | * as options by getopt. */ | |
3163 | if (argc < 3) { | |
3164 | error_exit("Not enough arguments"); | |
3165 | return 1; | |
3166 | } | |
3167 | ||
3168 | size = argv[--argc]; | |
3169 | ||
3170 | /* Parse getopt arguments */ | |
3171 | fmt = NULL; | |
3172 | for(;;) { | |
3173 | static const struct option long_options[] = { | |
3174 | {"help", no_argument, 0, 'h'}, | |
3175 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3176 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3177 | {0, 0, 0, 0} | |
3178 | }; | |
3179 | c = getopt_long(argc, argv, "f:hq", | |
3180 | long_options, NULL); | |
3181 | if (c == -1) { | |
3182 | break; | |
3183 | } | |
3184 | switch(c) { | |
3185 | case '?': | |
3186 | case 'h': | |
3187 | help(); | |
3188 | break; | |
3189 | case 'f': | |
3190 | fmt = optarg; | |
3191 | break; | |
3192 | case 'q': | |
3193 | quiet = true; | |
3194 | break; | |
3195 | case OPTION_OBJECT: { | |
3196 | QemuOpts *opts; | |
3197 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3198 | optarg, true); | |
3199 | if (!opts) { | |
3200 | return 1; | |
3201 | } | |
3202 | } break; | |
3203 | case OPTION_IMAGE_OPTS: | |
3204 | image_opts = true; | |
3205 | break; | |
3206 | } | |
3207 | } | |
3208 | if (optind != argc - 1) { | |
3209 | error_exit("Expecting one image file name"); | |
3210 | } | |
3211 | filename = argv[optind++]; | |
3212 | ||
3213 | if (qemu_opts_foreach(&qemu_object_opts, | |
3214 | user_creatable_add_opts_foreach, | |
3215 | NULL, NULL)) { | |
3216 | return 1; | |
3217 | } | |
3218 | ||
3219 | /* Choose grow, shrink, or absolute resize mode */ | |
3220 | switch (size[0]) { | |
3221 | case '+': | |
3222 | relative = 1; | |
3223 | size++; | |
3224 | break; | |
3225 | case '-': | |
3226 | relative = -1; | |
3227 | size++; | |
3228 | break; | |
3229 | default: | |
3230 | relative = 0; | |
3231 | break; | |
3232 | } | |
3233 | ||
3234 | /* Parse size */ | |
3235 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
3236 | qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); | |
3237 | if (err) { | |
3238 | error_report_err(err); | |
3239 | ret = -1; | |
3240 | qemu_opts_del(param); | |
3241 | goto out; | |
3242 | } | |
3243 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
3244 | qemu_opts_del(param); | |
3245 | ||
3246 | blk = img_open(image_opts, filename, fmt, | |
3247 | BDRV_O_RDWR, false, quiet); | |
3248 | if (!blk) { | |
3249 | ret = -1; | |
3250 | goto out; | |
3251 | } | |
3252 | ||
3253 | if (relative) { | |
3254 | total_size = blk_getlength(blk) + n * relative; | |
3255 | } else { | |
3256 | total_size = n; | |
3257 | } | |
3258 | if (total_size <= 0) { | |
3259 | error_report("New image size must be positive"); | |
3260 | ret = -1; | |
3261 | goto out; | |
3262 | } | |
3263 | ||
3264 | ret = blk_truncate(blk, total_size); | |
3265 | switch (ret) { | |
3266 | case 0: | |
3267 | qprintf(quiet, "Image resized.\n"); | |
3268 | break; | |
3269 | case -ENOTSUP: | |
3270 | error_report("This image does not support resize"); | |
3271 | break; | |
3272 | case -EACCES: | |
3273 | error_report("Image is read-only"); | |
3274 | break; | |
3275 | default: | |
3276 | error_report("Error resizing image (%d)", -ret); | |
3277 | break; | |
3278 | } | |
3279 | out: | |
3280 | blk_unref(blk); | |
3281 | if (ret) { | |
3282 | return 1; | |
3283 | } | |
3284 | return 0; | |
3285 | } | |
3286 | ||
3287 | static void amend_status_cb(BlockDriverState *bs, | |
3288 | int64_t offset, int64_t total_work_size, | |
3289 | void *opaque) | |
3290 | { | |
3291 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
3292 | } | |
3293 | ||
3294 | static int img_amend(int argc, char **argv) | |
3295 | { | |
3296 | Error *err = NULL; | |
3297 | int c, ret = 0; | |
3298 | char *options = NULL; | |
3299 | QemuOptsList *create_opts = NULL; | |
3300 | QemuOpts *opts = NULL; | |
3301 | const char *fmt = NULL, *filename, *cache; | |
3302 | int flags; | |
3303 | bool writethrough; | |
3304 | bool quiet = false, progress = false; | |
3305 | BlockBackend *blk = NULL; | |
3306 | BlockDriverState *bs = NULL; | |
3307 | bool image_opts = false; | |
3308 | ||
3309 | cache = BDRV_DEFAULT_CACHE; | |
3310 | for (;;) { | |
3311 | static const struct option long_options[] = { | |
3312 | {"help", no_argument, 0, 'h'}, | |
3313 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3314 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3315 | {0, 0, 0, 0} | |
3316 | }; | |
3317 | c = getopt_long(argc, argv, "ho:f:t:pq", | |
3318 | long_options, NULL); | |
3319 | if (c == -1) { | |
3320 | break; | |
3321 | } | |
3322 | ||
3323 | switch (c) { | |
3324 | case 'h': | |
3325 | case '?': | |
3326 | help(); | |
3327 | break; | |
3328 | case 'o': | |
3329 | if (!is_valid_option_list(optarg)) { | |
3330 | error_report("Invalid option list: %s", optarg); | |
3331 | ret = -1; | |
3332 | goto out_no_progress; | |
3333 | } | |
3334 | if (!options) { | |
3335 | options = g_strdup(optarg); | |
3336 | } else { | |
3337 | char *old_options = options; | |
3338 | options = g_strdup_printf("%s,%s", options, optarg); | |
3339 | g_free(old_options); | |
3340 | } | |
3341 | break; | |
3342 | case 'f': | |
3343 | fmt = optarg; | |
3344 | break; | |
3345 | case 't': | |
3346 | cache = optarg; | |
3347 | break; | |
3348 | case 'p': | |
3349 | progress = true; | |
3350 | break; | |
3351 | case 'q': | |
3352 | quiet = true; | |
3353 | break; | |
3354 | case OPTION_OBJECT: | |
3355 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3356 | optarg, true); | |
3357 | if (!opts) { | |
3358 | ret = -1; | |
3359 | goto out_no_progress; | |
3360 | } | |
3361 | break; | |
3362 | case OPTION_IMAGE_OPTS: | |
3363 | image_opts = true; | |
3364 | break; | |
3365 | } | |
3366 | } | |
3367 | ||
3368 | if (!options) { | |
3369 | error_exit("Must specify options (-o)"); | |
3370 | } | |
3371 | ||
3372 | if (qemu_opts_foreach(&qemu_object_opts, | |
3373 | user_creatable_add_opts_foreach, | |
3374 | NULL, NULL)) { | |
3375 | ret = -1; | |
3376 | goto out_no_progress; | |
3377 | } | |
3378 | ||
3379 | if (quiet) { | |
3380 | progress = false; | |
3381 | } | |
3382 | qemu_progress_init(progress, 1.0); | |
3383 | ||
3384 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
3385 | if (fmt && has_help_option(options)) { | |
3386 | /* If a format is explicitly specified (and possibly no filename is | |
3387 | * given), print option help here */ | |
3388 | ret = print_block_option_help(filename, fmt); | |
3389 | goto out; | |
3390 | } | |
3391 | ||
3392 | if (optind != argc - 1) { | |
3393 | error_report("Expecting one image file name"); | |
3394 | ret = -1; | |
3395 | goto out; | |
3396 | } | |
3397 | ||
3398 | flags = BDRV_O_RDWR; | |
3399 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3400 | if (ret < 0) { | |
3401 | error_report("Invalid cache option: %s", cache); | |
3402 | goto out; | |
3403 | } | |
3404 | ||
3405 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
3406 | if (!blk) { | |
3407 | ret = -1; | |
3408 | goto out; | |
3409 | } | |
3410 | bs = blk_bs(blk); | |
3411 | ||
3412 | fmt = bs->drv->format_name; | |
3413 | ||
3414 | if (has_help_option(options)) { | |
3415 | /* If the format was auto-detected, print option help here */ | |
3416 | ret = print_block_option_help(filename, fmt); | |
3417 | goto out; | |
3418 | } | |
3419 | ||
3420 | if (!bs->drv->create_opts) { | |
3421 | error_report("Format driver '%s' does not support any options to amend", | |
3422 | fmt); | |
3423 | ret = -1; | |
3424 | goto out; | |
3425 | } | |
3426 | ||
3427 | create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); | |
3428 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
3429 | if (options) { | |
3430 | qemu_opts_do_parse(opts, options, NULL, &err); | |
3431 | if (err) { | |
3432 | error_report_err(err); | |
3433 | ret = -1; | |
3434 | goto out; | |
3435 | } | |
3436 | } | |
3437 | ||
3438 | /* In case the driver does not call amend_status_cb() */ | |
3439 | qemu_progress_print(0.f, 0); | |
3440 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); | |
3441 | qemu_progress_print(100.f, 0); | |
3442 | if (ret < 0) { | |
3443 | error_report("Error while amending options: %s", strerror(-ret)); | |
3444 | goto out; | |
3445 | } | |
3446 | ||
3447 | out: | |
3448 | qemu_progress_end(); | |
3449 | ||
3450 | out_no_progress: | |
3451 | blk_unref(blk); | |
3452 | qemu_opts_del(opts); | |
3453 | qemu_opts_free(create_opts); | |
3454 | g_free(options); | |
3455 | ||
3456 | if (ret) { | |
3457 | return 1; | |
3458 | } | |
3459 | return 0; | |
3460 | } | |
3461 | ||
3462 | static const img_cmd_t img_cmds[] = { | |
3463 | #define DEF(option, callback, arg_string) \ | |
3464 | { option, callback }, | |
3465 | #include "qemu-img-cmds.h" | |
3466 | #undef DEF | |
3467 | #undef GEN_DOCS | |
3468 | { NULL, NULL, }, | |
3469 | }; | |
3470 | ||
3471 | int main(int argc, char **argv) | |
3472 | { | |
3473 | const img_cmd_t *cmd; | |
3474 | const char *cmdname; | |
3475 | Error *local_error = NULL; | |
3476 | int c; | |
3477 | static const struct option long_options[] = { | |
3478 | {"help", no_argument, 0, 'h'}, | |
3479 | {"version", no_argument, 0, 'v'}, | |
3480 | {0, 0, 0, 0} | |
3481 | }; | |
3482 | ||
3483 | #ifdef CONFIG_POSIX | |
3484 | signal(SIGPIPE, SIG_IGN); | |
3485 | #endif | |
3486 | ||
3487 | error_set_progname(argv[0]); | |
3488 | qemu_init_exec_dir(argv[0]); | |
3489 | ||
3490 | if (qemu_init_main_loop(&local_error)) { | |
3491 | error_report_err(local_error); | |
3492 | exit(EXIT_FAILURE); | |
3493 | } | |
3494 | ||
3495 | qcrypto_init(&error_fatal); | |
3496 | ||
3497 | module_call_init(MODULE_INIT_QOM); | |
3498 | bdrv_init(); | |
3499 | if (argc < 2) { | |
3500 | error_exit("Not enough arguments"); | |
3501 | } | |
3502 | cmdname = argv[1]; | |
3503 | ||
3504 | qemu_add_opts(&qemu_object_opts); | |
3505 | qemu_add_opts(&qemu_source_opts); | |
3506 | ||
3507 | /* find the command */ | |
3508 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
3509 | if (!strcmp(cmdname, cmd->name)) { | |
3510 | return cmd->handler(argc - 1, argv + 1); | |
3511 | } | |
3512 | } | |
3513 | ||
3514 | c = getopt_long(argc, argv, "h", long_options, NULL); | |
3515 | ||
3516 | if (c == 'h') { | |
3517 | help(); | |
3518 | } | |
3519 | if (c == 'v') { | |
3520 | printf(QEMU_IMG_VERSION); | |
3521 | return 0; | |
3522 | } | |
3523 | ||
3524 | /* not found */ | |
3525 | error_exit("Command not found: %s", cmdname); | |
3526 | } |