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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 "qemu-version.h" | |
26 | #include "qapi/error.h" | |
27 | #include "qapi-visit.h" | |
28 | #include "qapi/qobject-output-visitor.h" | |
29 | #include "qapi/qmp/qerror.h" | |
30 | #include "qapi/qmp/qjson.h" | |
31 | #include "qemu/cutils.h" | |
32 | #include "qemu/config-file.h" | |
33 | #include "qemu/option.h" | |
34 | #include "qemu/error-report.h" | |
35 | #include "qemu/log.h" | |
36 | #include "qom/object_interfaces.h" | |
37 | #include "sysemu/sysemu.h" | |
38 | #include "sysemu/block-backend.h" | |
39 | #include "block/block_int.h" | |
40 | #include "block/blockjob.h" | |
41 | #include "block/qapi.h" | |
42 | #include "crypto/init.h" | |
43 | #include "trace/control.h" | |
44 | #include <getopt.h> | |
45 | ||
46 | #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ | |
47 | "\n" QEMU_COPYRIGHT "\n" | |
48 | ||
49 | typedef struct img_cmd_t { | |
50 | const char *name; | |
51 | int (*handler)(int argc, char **argv); | |
52 | } img_cmd_t; | |
53 | ||
54 | enum { | |
55 | OPTION_OUTPUT = 256, | |
56 | OPTION_BACKING_CHAIN = 257, | |
57 | OPTION_OBJECT = 258, | |
58 | OPTION_IMAGE_OPTS = 259, | |
59 | OPTION_PATTERN = 260, | |
60 | OPTION_FLUSH_INTERVAL = 261, | |
61 | OPTION_NO_DRAIN = 262, | |
62 | }; | |
63 | ||
64 | typedef enum OutputFormat { | |
65 | OFORMAT_JSON, | |
66 | OFORMAT_HUMAN, | |
67 | } OutputFormat; | |
68 | ||
69 | /* Default to cache=writeback as data integrity is not important for qemu-img */ | |
70 | #define BDRV_DEFAULT_CACHE "writeback" | |
71 | ||
72 | static void format_print(void *opaque, const char *name) | |
73 | { | |
74 | printf(" %s", name); | |
75 | } | |
76 | ||
77 | static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) | |
78 | { | |
79 | va_list ap; | |
80 | ||
81 | error_printf("qemu-img: "); | |
82 | ||
83 | va_start(ap, fmt); | |
84 | error_vprintf(fmt, ap); | |
85 | va_end(ap); | |
86 | ||
87 | error_printf("\nTry 'qemu-img --help' for more information\n"); | |
88 | exit(EXIT_FAILURE); | |
89 | } | |
90 | ||
91 | /* Please keep in synch with qemu-img.texi */ | |
92 | static void QEMU_NORETURN help(void) | |
93 | { | |
94 | const char *help_msg = | |
95 | QEMU_IMG_VERSION | |
96 | "usage: qemu-img [standard options] command [command options]\n" | |
97 | "QEMU disk image utility\n" | |
98 | "\n" | |
99 | " '-h', '--help' display this help and exit\n" | |
100 | " '-V', '--version' output version information and exit\n" | |
101 | " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" | |
102 | " specify tracing options\n" | |
103 | "\n" | |
104 | "Command syntax:\n" | |
105 | #define DEF(option, callback, arg_string) \ | |
106 | " " arg_string "\n" | |
107 | #include "qemu-img-cmds.h" | |
108 | #undef DEF | |
109 | #undef GEN_DOCS | |
110 | "\n" | |
111 | "Command parameters:\n" | |
112 | " 'filename' is a disk image filename\n" | |
113 | " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" | |
114 | " manual page for a description of the object properties. The most common\n" | |
115 | " object type is a 'secret', which is used to supply passwords and/or\n" | |
116 | " encryption keys.\n" | |
117 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" | |
118 | " 'cache' is the cache mode used to write the output disk image, the valid\n" | |
119 | " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" | |
120 | " 'directsync' and 'unsafe' (default for convert)\n" | |
121 | " 'src_cache' is the cache mode used to read input disk images, the valid\n" | |
122 | " options are the same as for the 'cache' option\n" | |
123 | " 'size' is the disk image size in bytes. Optional suffixes\n" | |
124 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" | |
125 | " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" | |
126 | " supported. 'b' is ignored.\n" | |
127 | " 'output_filename' is the destination disk image filename\n" | |
128 | " 'output_fmt' is the destination format\n" | |
129 | " 'options' is a comma separated list of format specific options in a\n" | |
130 | " name=value format. Use -o ? for an overview of the options supported by the\n" | |
131 | " used format\n" | |
132 | " 'snapshot_param' is param used for internal snapshot, format\n" | |
133 | " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" | |
134 | " '[ID_OR_NAME]'\n" | |
135 | " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" | |
136 | " instead\n" | |
137 | " '-c' indicates that target image must be compressed (qcow format only)\n" | |
138 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" | |
139 | " match exactly. The image doesn't need a working backing file before\n" | |
140 | " rebasing in this case (useful for renaming the backing file)\n" | |
141 | " '-h' with or without a command shows this help and lists the supported formats\n" | |
142 | " '-p' show progress of command (only certain commands)\n" | |
143 | " '-q' use Quiet mode - do not print any output (except errors)\n" | |
144 | " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" | |
145 | " contain only zeros for qemu-img to create a sparse image during\n" | |
146 | " conversion. If the number of bytes is 0, the source will not be scanned for\n" | |
147 | " unallocated or zero sectors, and the destination image will always be\n" | |
148 | " fully allocated\n" | |
149 | " '--output' takes the format in which the output must be done (human or json)\n" | |
150 | " '-n' skips the target volume creation (useful if the volume is created\n" | |
151 | " prior to running qemu-img)\n" | |
152 | "\n" | |
153 | "Parameters to check subcommand:\n" | |
154 | " '-r' tries to repair any inconsistencies that are found during the check.\n" | |
155 | " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" | |
156 | " kinds of errors, with a higher risk of choosing the wrong fix or\n" | |
157 | " hiding corruption that has already occurred.\n" | |
158 | "\n" | |
159 | "Parameters to snapshot subcommand:\n" | |
160 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" | |
161 | " '-a' applies a snapshot (revert disk to saved state)\n" | |
162 | " '-c' creates a snapshot\n" | |
163 | " '-d' deletes a snapshot\n" | |
164 | " '-l' lists all snapshots in the given image\n" | |
165 | "\n" | |
166 | "Parameters to compare subcommand:\n" | |
167 | " '-f' first image format\n" | |
168 | " '-F' second image format\n" | |
169 | " '-s' run in Strict mode - fail on different image size or sector allocation\n" | |
170 | "\n" | |
171 | "Parameters to dd subcommand:\n" | |
172 | " 'bs=BYTES' read and write up to BYTES bytes at a time " | |
173 | "(default: 512)\n" | |
174 | " 'count=N' copy only N input blocks\n" | |
175 | " 'if=FILE' read from FILE\n" | |
176 | " 'of=FILE' write to FILE\n" | |
177 | " 'skip=N' skip N bs-sized blocks at the start of input\n"; | |
178 | ||
179 | printf("%s\nSupported formats:", help_msg); | |
180 | bdrv_iterate_format(format_print, NULL); | |
181 | printf("\n"); | |
182 | exit(EXIT_SUCCESS); | |
183 | } | |
184 | ||
185 | static QemuOptsList qemu_object_opts = { | |
186 | .name = "object", | |
187 | .implied_opt_name = "qom-type", | |
188 | .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), | |
189 | .desc = { | |
190 | { } | |
191 | }, | |
192 | }; | |
193 | ||
194 | static QemuOptsList qemu_source_opts = { | |
195 | .name = "source", | |
196 | .implied_opt_name = "file", | |
197 | .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), | |
198 | .desc = { | |
199 | { } | |
200 | }, | |
201 | }; | |
202 | ||
203 | static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) | |
204 | { | |
205 | int ret = 0; | |
206 | if (!quiet) { | |
207 | va_list args; | |
208 | va_start(args, fmt); | |
209 | ret = vprintf(fmt, args); | |
210 | va_end(args); | |
211 | } | |
212 | return ret; | |
213 | } | |
214 | ||
215 | ||
216 | static int print_block_option_help(const char *filename, const char *fmt) | |
217 | { | |
218 | BlockDriver *drv, *proto_drv; | |
219 | QemuOptsList *create_opts = NULL; | |
220 | Error *local_err = NULL; | |
221 | ||
222 | /* Find driver and parse its options */ | |
223 | drv = bdrv_find_format(fmt); | |
224 | if (!drv) { | |
225 | error_report("Unknown file format '%s'", fmt); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
230 | if (filename) { | |
231 | proto_drv = bdrv_find_protocol(filename, true, &local_err); | |
232 | if (!proto_drv) { | |
233 | error_report_err(local_err); | |
234 | qemu_opts_free(create_opts); | |
235 | return 1; | |
236 | } | |
237 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
238 | } | |
239 | ||
240 | qemu_opts_print_help(create_opts); | |
241 | qemu_opts_free(create_opts); | |
242 | return 0; | |
243 | } | |
244 | ||
245 | ||
246 | static int img_open_password(BlockBackend *blk, const char *filename, | |
247 | int flags, bool quiet) | |
248 | { | |
249 | BlockDriverState *bs; | |
250 | char password[256]; | |
251 | ||
252 | bs = blk_bs(blk); | |
253 | if (bdrv_is_encrypted(bs) && bdrv_key_required(bs) && | |
254 | !(flags & BDRV_O_NO_IO)) { | |
255 | qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); | |
256 | if (qemu_read_password(password, sizeof(password)) < 0) { | |
257 | error_report("No password given"); | |
258 | return -1; | |
259 | } | |
260 | if (bdrv_set_key(bs, password) < 0) { | |
261 | error_report("invalid password"); | |
262 | return -1; | |
263 | } | |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
268 | ||
269 | static BlockBackend *img_open_opts(const char *optstr, | |
270 | QemuOpts *opts, int flags, bool writethrough, | |
271 | bool quiet) | |
272 | { | |
273 | QDict *options; | |
274 | Error *local_err = NULL; | |
275 | BlockBackend *blk; | |
276 | options = qemu_opts_to_qdict(opts, NULL); | |
277 | blk = blk_new_open(NULL, NULL, options, flags, &local_err); | |
278 | if (!blk) { | |
279 | error_reportf_err(local_err, "Could not open '%s': ", optstr); | |
280 | return NULL; | |
281 | } | |
282 | blk_set_enable_write_cache(blk, !writethrough); | |
283 | ||
284 | if (img_open_password(blk, optstr, flags, quiet) < 0) { | |
285 | blk_unref(blk); | |
286 | return NULL; | |
287 | } | |
288 | return blk; | |
289 | } | |
290 | ||
291 | static BlockBackend *img_open_file(const char *filename, | |
292 | const char *fmt, int flags, | |
293 | bool writethrough, bool quiet) | |
294 | { | |
295 | BlockBackend *blk; | |
296 | Error *local_err = NULL; | |
297 | QDict *options = NULL; | |
298 | ||
299 | if (fmt) { | |
300 | options = qdict_new(); | |
301 | qdict_put(options, "driver", qstring_from_str(fmt)); | |
302 | } | |
303 | ||
304 | blk = blk_new_open(filename, NULL, options, flags, &local_err); | |
305 | if (!blk) { | |
306 | error_reportf_err(local_err, "Could not open '%s': ", filename); | |
307 | return NULL; | |
308 | } | |
309 | blk_set_enable_write_cache(blk, !writethrough); | |
310 | ||
311 | if (img_open_password(blk, filename, flags, quiet) < 0) { | |
312 | blk_unref(blk); | |
313 | return NULL; | |
314 | } | |
315 | return blk; | |
316 | } | |
317 | ||
318 | ||
319 | static BlockBackend *img_open(bool image_opts, | |
320 | const char *filename, | |
321 | const char *fmt, int flags, bool writethrough, | |
322 | bool quiet) | |
323 | { | |
324 | BlockBackend *blk; | |
325 | if (image_opts) { | |
326 | QemuOpts *opts; | |
327 | if (fmt) { | |
328 | error_report("--image-opts and --format are mutually exclusive"); | |
329 | return NULL; | |
330 | } | |
331 | opts = qemu_opts_parse_noisily(qemu_find_opts("source"), | |
332 | filename, true); | |
333 | if (!opts) { | |
334 | return NULL; | |
335 | } | |
336 | blk = img_open_opts(filename, opts, flags, writethrough, quiet); | |
337 | } else { | |
338 | blk = img_open_file(filename, fmt, flags, writethrough, quiet); | |
339 | } | |
340 | return blk; | |
341 | } | |
342 | ||
343 | ||
344 | static int add_old_style_options(const char *fmt, QemuOpts *opts, | |
345 | const char *base_filename, | |
346 | const char *base_fmt) | |
347 | { | |
348 | Error *err = NULL; | |
349 | ||
350 | if (base_filename) { | |
351 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); | |
352 | if (err) { | |
353 | error_report("Backing file not supported for file format '%s'", | |
354 | fmt); | |
355 | error_free(err); | |
356 | return -1; | |
357 | } | |
358 | } | |
359 | if (base_fmt) { | |
360 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); | |
361 | if (err) { | |
362 | error_report("Backing file format not supported for file " | |
363 | "format '%s'", fmt); | |
364 | error_free(err); | |
365 | return -1; | |
366 | } | |
367 | } | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static int img_create(int argc, char **argv) | |
372 | { | |
373 | int c; | |
374 | uint64_t img_size = -1; | |
375 | const char *fmt = "raw"; | |
376 | const char *base_fmt = NULL; | |
377 | const char *filename; | |
378 | const char *base_filename = NULL; | |
379 | char *options = NULL; | |
380 | Error *local_err = NULL; | |
381 | bool quiet = false; | |
382 | ||
383 | for(;;) { | |
384 | static const struct option long_options[] = { | |
385 | {"help", no_argument, 0, 'h'}, | |
386 | {"object", required_argument, 0, OPTION_OBJECT}, | |
387 | {0, 0, 0, 0} | |
388 | }; | |
389 | c = getopt_long(argc, argv, "F:b:f:he6o:q", | |
390 | long_options, NULL); | |
391 | if (c == -1) { | |
392 | break; | |
393 | } | |
394 | switch(c) { | |
395 | case '?': | |
396 | case 'h': | |
397 | help(); | |
398 | break; | |
399 | case 'F': | |
400 | base_fmt = optarg; | |
401 | break; | |
402 | case 'b': | |
403 | base_filename = optarg; | |
404 | break; | |
405 | case 'f': | |
406 | fmt = optarg; | |
407 | break; | |
408 | case 'e': | |
409 | error_report("option -e is deprecated, please use \'-o " | |
410 | "encryption\' instead!"); | |
411 | goto fail; | |
412 | case '6': | |
413 | error_report("option -6 is deprecated, please use \'-o " | |
414 | "compat6\' instead!"); | |
415 | goto fail; | |
416 | case 'o': | |
417 | if (!is_valid_option_list(optarg)) { | |
418 | error_report("Invalid option list: %s", optarg); | |
419 | goto fail; | |
420 | } | |
421 | if (!options) { | |
422 | options = g_strdup(optarg); | |
423 | } else { | |
424 | char *old_options = options; | |
425 | options = g_strdup_printf("%s,%s", options, optarg); | |
426 | g_free(old_options); | |
427 | } | |
428 | break; | |
429 | case 'q': | |
430 | quiet = true; | |
431 | break; | |
432 | case OPTION_OBJECT: { | |
433 | QemuOpts *opts; | |
434 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
435 | optarg, true); | |
436 | if (!opts) { | |
437 | goto fail; | |
438 | } | |
439 | } break; | |
440 | } | |
441 | } | |
442 | ||
443 | /* Get the filename */ | |
444 | filename = (optind < argc) ? argv[optind] : NULL; | |
445 | if (options && has_help_option(options)) { | |
446 | g_free(options); | |
447 | return print_block_option_help(filename, fmt); | |
448 | } | |
449 | ||
450 | if (optind >= argc) { | |
451 | error_exit("Expecting image file name"); | |
452 | } | |
453 | optind++; | |
454 | ||
455 | if (qemu_opts_foreach(&qemu_object_opts, | |
456 | user_creatable_add_opts_foreach, | |
457 | NULL, NULL)) { | |
458 | goto fail; | |
459 | } | |
460 | ||
461 | /* Get image size, if specified */ | |
462 | if (optind < argc) { | |
463 | int64_t sval; | |
464 | char *end; | |
465 | sval = qemu_strtosz_suffix(argv[optind++], &end, | |
466 | QEMU_STRTOSZ_DEFSUFFIX_B); | |
467 | if (sval < 0 || *end) { | |
468 | if (sval == -ERANGE) { | |
469 | error_report("Image size must be less than 8 EiB!"); | |
470 | } else { | |
471 | error_report("Invalid image size specified! You may use k, M, " | |
472 | "G, T, P or E suffixes for "); | |
473 | error_report("kilobytes, megabytes, gigabytes, terabytes, " | |
474 | "petabytes and exabytes."); | |
475 | } | |
476 | goto fail; | |
477 | } | |
478 | img_size = (uint64_t)sval; | |
479 | } | |
480 | if (optind != argc) { | |
481 | error_exit("Unexpected argument: %s", argv[optind]); | |
482 | } | |
483 | ||
484 | bdrv_img_create(filename, fmt, base_filename, base_fmt, | |
485 | options, img_size, 0, &local_err, quiet); | |
486 | if (local_err) { | |
487 | error_reportf_err(local_err, "%s: ", filename); | |
488 | goto fail; | |
489 | } | |
490 | ||
491 | g_free(options); | |
492 | return 0; | |
493 | ||
494 | fail: | |
495 | g_free(options); | |
496 | return 1; | |
497 | } | |
498 | ||
499 | static void dump_json_image_check(ImageCheck *check, bool quiet) | |
500 | { | |
501 | QString *str; | |
502 | QObject *obj; | |
503 | Visitor *v = qobject_output_visitor_new(&obj); | |
504 | ||
505 | visit_type_ImageCheck(v, NULL, &check, &error_abort); | |
506 | visit_complete(v, &obj); | |
507 | str = qobject_to_json_pretty(obj); | |
508 | assert(str != NULL); | |
509 | qprintf(quiet, "%s\n", qstring_get_str(str)); | |
510 | qobject_decref(obj); | |
511 | visit_free(v); | |
512 | QDECREF(str); | |
513 | } | |
514 | ||
515 | static void dump_human_image_check(ImageCheck *check, bool quiet) | |
516 | { | |
517 | if (!(check->corruptions || check->leaks || check->check_errors)) { | |
518 | qprintf(quiet, "No errors were found on the image.\n"); | |
519 | } else { | |
520 | if (check->corruptions) { | |
521 | qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" | |
522 | "Data may be corrupted, or further writes to the image " | |
523 | "may corrupt it.\n", | |
524 | check->corruptions); | |
525 | } | |
526 | ||
527 | if (check->leaks) { | |
528 | qprintf(quiet, | |
529 | "\n%" PRId64 " leaked clusters were found on the image.\n" | |
530 | "This means waste of disk space, but no harm to data.\n", | |
531 | check->leaks); | |
532 | } | |
533 | ||
534 | if (check->check_errors) { | |
535 | qprintf(quiet, | |
536 | "\n%" PRId64 | |
537 | " internal errors have occurred during the check.\n", | |
538 | check->check_errors); | |
539 | } | |
540 | } | |
541 | ||
542 | if (check->total_clusters != 0 && check->allocated_clusters != 0) { | |
543 | qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " | |
544 | "%0.2f%% fragmented, %0.2f%% compressed clusters\n", | |
545 | check->allocated_clusters, check->total_clusters, | |
546 | check->allocated_clusters * 100.0 / check->total_clusters, | |
547 | check->fragmented_clusters * 100.0 / check->allocated_clusters, | |
548 | check->compressed_clusters * 100.0 / | |
549 | check->allocated_clusters); | |
550 | } | |
551 | ||
552 | if (check->image_end_offset) { | |
553 | qprintf(quiet, | |
554 | "Image end offset: %" PRId64 "\n", check->image_end_offset); | |
555 | } | |
556 | } | |
557 | ||
558 | static int collect_image_check(BlockDriverState *bs, | |
559 | ImageCheck *check, | |
560 | const char *filename, | |
561 | const char *fmt, | |
562 | int fix) | |
563 | { | |
564 | int ret; | |
565 | BdrvCheckResult result; | |
566 | ||
567 | ret = bdrv_check(bs, &result, fix); | |
568 | if (ret < 0) { | |
569 | return ret; | |
570 | } | |
571 | ||
572 | check->filename = g_strdup(filename); | |
573 | check->format = g_strdup(bdrv_get_format_name(bs)); | |
574 | check->check_errors = result.check_errors; | |
575 | check->corruptions = result.corruptions; | |
576 | check->has_corruptions = result.corruptions != 0; | |
577 | check->leaks = result.leaks; | |
578 | check->has_leaks = result.leaks != 0; | |
579 | check->corruptions_fixed = result.corruptions_fixed; | |
580 | check->has_corruptions_fixed = result.corruptions != 0; | |
581 | check->leaks_fixed = result.leaks_fixed; | |
582 | check->has_leaks_fixed = result.leaks != 0; | |
583 | check->image_end_offset = result.image_end_offset; | |
584 | check->has_image_end_offset = result.image_end_offset != 0; | |
585 | check->total_clusters = result.bfi.total_clusters; | |
586 | check->has_total_clusters = result.bfi.total_clusters != 0; | |
587 | check->allocated_clusters = result.bfi.allocated_clusters; | |
588 | check->has_allocated_clusters = result.bfi.allocated_clusters != 0; | |
589 | check->fragmented_clusters = result.bfi.fragmented_clusters; | |
590 | check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; | |
591 | check->compressed_clusters = result.bfi.compressed_clusters; | |
592 | check->has_compressed_clusters = result.bfi.compressed_clusters != 0; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Checks an image for consistency. Exit codes: | |
599 | * | |
600 | * 0 - Check completed, image is good | |
601 | * 1 - Check not completed because of internal errors | |
602 | * 2 - Check completed, image is corrupted | |
603 | * 3 - Check completed, image has leaked clusters, but is good otherwise | |
604 | * 63 - Checks are not supported by the image format | |
605 | */ | |
606 | static int img_check(int argc, char **argv) | |
607 | { | |
608 | int c, ret; | |
609 | OutputFormat output_format = OFORMAT_HUMAN; | |
610 | const char *filename, *fmt, *output, *cache; | |
611 | BlockBackend *blk; | |
612 | BlockDriverState *bs; | |
613 | int fix = 0; | |
614 | int flags = BDRV_O_CHECK; | |
615 | bool writethrough; | |
616 | ImageCheck *check; | |
617 | bool quiet = false; | |
618 | bool image_opts = false; | |
619 | ||
620 | fmt = NULL; | |
621 | output = NULL; | |
622 | cache = BDRV_DEFAULT_CACHE; | |
623 | ||
624 | for(;;) { | |
625 | int option_index = 0; | |
626 | static const struct option long_options[] = { | |
627 | {"help", no_argument, 0, 'h'}, | |
628 | {"format", required_argument, 0, 'f'}, | |
629 | {"repair", required_argument, 0, 'r'}, | |
630 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
631 | {"object", required_argument, 0, OPTION_OBJECT}, | |
632 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
633 | {0, 0, 0, 0} | |
634 | }; | |
635 | c = getopt_long(argc, argv, "hf:r:T:q", | |
636 | long_options, &option_index); | |
637 | if (c == -1) { | |
638 | break; | |
639 | } | |
640 | switch(c) { | |
641 | case '?': | |
642 | case 'h': | |
643 | help(); | |
644 | break; | |
645 | case 'f': | |
646 | fmt = optarg; | |
647 | break; | |
648 | case 'r': | |
649 | flags |= BDRV_O_RDWR; | |
650 | ||
651 | if (!strcmp(optarg, "leaks")) { | |
652 | fix = BDRV_FIX_LEAKS; | |
653 | } else if (!strcmp(optarg, "all")) { | |
654 | fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; | |
655 | } else { | |
656 | error_exit("Unknown option value for -r " | |
657 | "(expecting 'leaks' or 'all'): %s", optarg); | |
658 | } | |
659 | break; | |
660 | case OPTION_OUTPUT: | |
661 | output = optarg; | |
662 | break; | |
663 | case 'T': | |
664 | cache = optarg; | |
665 | break; | |
666 | case 'q': | |
667 | quiet = true; | |
668 | break; | |
669 | case OPTION_OBJECT: { | |
670 | QemuOpts *opts; | |
671 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
672 | optarg, true); | |
673 | if (!opts) { | |
674 | return 1; | |
675 | } | |
676 | } break; | |
677 | case OPTION_IMAGE_OPTS: | |
678 | image_opts = true; | |
679 | break; | |
680 | } | |
681 | } | |
682 | if (optind != argc - 1) { | |
683 | error_exit("Expecting one image file name"); | |
684 | } | |
685 | filename = argv[optind++]; | |
686 | ||
687 | if (output && !strcmp(output, "json")) { | |
688 | output_format = OFORMAT_JSON; | |
689 | } else if (output && !strcmp(output, "human")) { | |
690 | output_format = OFORMAT_HUMAN; | |
691 | } else if (output) { | |
692 | error_report("--output must be used with human or json as argument."); | |
693 | return 1; | |
694 | } | |
695 | ||
696 | if (qemu_opts_foreach(&qemu_object_opts, | |
697 | user_creatable_add_opts_foreach, | |
698 | NULL, NULL)) { | |
699 | return 1; | |
700 | } | |
701 | ||
702 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
703 | if (ret < 0) { | |
704 | error_report("Invalid source cache option: %s", cache); | |
705 | return 1; | |
706 | } | |
707 | ||
708 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
709 | if (!blk) { | |
710 | return 1; | |
711 | } | |
712 | bs = blk_bs(blk); | |
713 | ||
714 | check = g_new0(ImageCheck, 1); | |
715 | ret = collect_image_check(bs, check, filename, fmt, fix); | |
716 | ||
717 | if (ret == -ENOTSUP) { | |
718 | error_report("This image format does not support checks"); | |
719 | ret = 63; | |
720 | goto fail; | |
721 | } | |
722 | ||
723 | if (check->corruptions_fixed || check->leaks_fixed) { | |
724 | int corruptions_fixed, leaks_fixed; | |
725 | ||
726 | leaks_fixed = check->leaks_fixed; | |
727 | corruptions_fixed = check->corruptions_fixed; | |
728 | ||
729 | if (output_format == OFORMAT_HUMAN) { | |
730 | qprintf(quiet, | |
731 | "The following inconsistencies were found and repaired:\n\n" | |
732 | " %" PRId64 " leaked clusters\n" | |
733 | " %" PRId64 " corruptions\n\n" | |
734 | "Double checking the fixed image now...\n", | |
735 | check->leaks_fixed, | |
736 | check->corruptions_fixed); | |
737 | } | |
738 | ||
739 | ret = collect_image_check(bs, check, filename, fmt, 0); | |
740 | ||
741 | check->leaks_fixed = leaks_fixed; | |
742 | check->corruptions_fixed = corruptions_fixed; | |
743 | } | |
744 | ||
745 | if (!ret) { | |
746 | switch (output_format) { | |
747 | case OFORMAT_HUMAN: | |
748 | dump_human_image_check(check, quiet); | |
749 | break; | |
750 | case OFORMAT_JSON: | |
751 | dump_json_image_check(check, quiet); | |
752 | break; | |
753 | } | |
754 | } | |
755 | ||
756 | if (ret || check->check_errors) { | |
757 | if (ret) { | |
758 | error_report("Check failed: %s", strerror(-ret)); | |
759 | } else { | |
760 | error_report("Check failed"); | |
761 | } | |
762 | ret = 1; | |
763 | goto fail; | |
764 | } | |
765 | ||
766 | if (check->corruptions) { | |
767 | ret = 2; | |
768 | } else if (check->leaks) { | |
769 | ret = 3; | |
770 | } else { | |
771 | ret = 0; | |
772 | } | |
773 | ||
774 | fail: | |
775 | qapi_free_ImageCheck(check); | |
776 | blk_unref(blk); | |
777 | return ret; | |
778 | } | |
779 | ||
780 | typedef struct CommonBlockJobCBInfo { | |
781 | BlockDriverState *bs; | |
782 | Error **errp; | |
783 | } CommonBlockJobCBInfo; | |
784 | ||
785 | static void common_block_job_cb(void *opaque, int ret) | |
786 | { | |
787 | CommonBlockJobCBInfo *cbi = opaque; | |
788 | ||
789 | if (ret < 0) { | |
790 | error_setg_errno(cbi->errp, -ret, "Block job failed"); | |
791 | } | |
792 | } | |
793 | ||
794 | static void run_block_job(BlockJob *job, Error **errp) | |
795 | { | |
796 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
797 | ||
798 | aio_context_acquire(aio_context); | |
799 | do { | |
800 | aio_poll(aio_context, true); | |
801 | qemu_progress_print(job->len ? | |
802 | ((float)job->offset / job->len * 100.f) : 0.0f, 0); | |
803 | } while (!job->ready); | |
804 | ||
805 | block_job_complete_sync(job, errp); | |
806 | aio_context_release(aio_context); | |
807 | ||
808 | /* A block job may finish instantaneously without publishing any progress, | |
809 | * so just signal completion here */ | |
810 | qemu_progress_print(100.f, 0); | |
811 | } | |
812 | ||
813 | static int img_commit(int argc, char **argv) | |
814 | { | |
815 | int c, ret, flags; | |
816 | const char *filename, *fmt, *cache, *base; | |
817 | BlockBackend *blk; | |
818 | BlockDriverState *bs, *base_bs; | |
819 | bool progress = false, quiet = false, drop = false; | |
820 | bool writethrough; | |
821 | Error *local_err = NULL; | |
822 | CommonBlockJobCBInfo cbi; | |
823 | bool image_opts = false; | |
824 | AioContext *aio_context; | |
825 | ||
826 | fmt = NULL; | |
827 | cache = BDRV_DEFAULT_CACHE; | |
828 | base = NULL; | |
829 | for(;;) { | |
830 | static const struct option long_options[] = { | |
831 | {"help", no_argument, 0, 'h'}, | |
832 | {"object", required_argument, 0, OPTION_OBJECT}, | |
833 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
834 | {0, 0, 0, 0} | |
835 | }; | |
836 | c = getopt_long(argc, argv, "f:ht:b:dpq", | |
837 | long_options, NULL); | |
838 | if (c == -1) { | |
839 | break; | |
840 | } | |
841 | switch(c) { | |
842 | case '?': | |
843 | case 'h': | |
844 | help(); | |
845 | break; | |
846 | case 'f': | |
847 | fmt = optarg; | |
848 | break; | |
849 | case 't': | |
850 | cache = optarg; | |
851 | break; | |
852 | case 'b': | |
853 | base = optarg; | |
854 | /* -b implies -d */ | |
855 | drop = true; | |
856 | break; | |
857 | case 'd': | |
858 | drop = true; | |
859 | break; | |
860 | case 'p': | |
861 | progress = true; | |
862 | break; | |
863 | case 'q': | |
864 | quiet = true; | |
865 | break; | |
866 | case OPTION_OBJECT: { | |
867 | QemuOpts *opts; | |
868 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
869 | optarg, true); | |
870 | if (!opts) { | |
871 | return 1; | |
872 | } | |
873 | } break; | |
874 | case OPTION_IMAGE_OPTS: | |
875 | image_opts = true; | |
876 | break; | |
877 | } | |
878 | } | |
879 | ||
880 | /* Progress is not shown in Quiet mode */ | |
881 | if (quiet) { | |
882 | progress = false; | |
883 | } | |
884 | ||
885 | if (optind != argc - 1) { | |
886 | error_exit("Expecting one image file name"); | |
887 | } | |
888 | filename = argv[optind++]; | |
889 | ||
890 | if (qemu_opts_foreach(&qemu_object_opts, | |
891 | user_creatable_add_opts_foreach, | |
892 | NULL, NULL)) { | |
893 | return 1; | |
894 | } | |
895 | ||
896 | flags = BDRV_O_RDWR | BDRV_O_UNMAP; | |
897 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
898 | if (ret < 0) { | |
899 | error_report("Invalid cache option: %s", cache); | |
900 | return 1; | |
901 | } | |
902 | ||
903 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
904 | if (!blk) { | |
905 | return 1; | |
906 | } | |
907 | bs = blk_bs(blk); | |
908 | ||
909 | qemu_progress_init(progress, 1.f); | |
910 | qemu_progress_print(0.f, 100); | |
911 | ||
912 | if (base) { | |
913 | base_bs = bdrv_find_backing_image(bs, base); | |
914 | if (!base_bs) { | |
915 | error_setg(&local_err, QERR_BASE_NOT_FOUND, base); | |
916 | goto done; | |
917 | } | |
918 | } else { | |
919 | /* This is different from QMP, which by default uses the deepest file in | |
920 | * the backing chain (i.e., the very base); however, the traditional | |
921 | * behavior of qemu-img commit is using the immediate backing file. */ | |
922 | base_bs = backing_bs(bs); | |
923 | if (!base_bs) { | |
924 | error_setg(&local_err, "Image does not have a backing file"); | |
925 | goto done; | |
926 | } | |
927 | } | |
928 | ||
929 | cbi = (CommonBlockJobCBInfo){ | |
930 | .errp = &local_err, | |
931 | .bs = bs, | |
932 | }; | |
933 | ||
934 | aio_context = bdrv_get_aio_context(bs); | |
935 | aio_context_acquire(aio_context); | |
936 | commit_active_start("commit", bs, base_bs, BLOCK_JOB_DEFAULT, 0, | |
937 | BLOCKDEV_ON_ERROR_REPORT, common_block_job_cb, &cbi, | |
938 | &local_err, false); | |
939 | aio_context_release(aio_context); | |
940 | if (local_err) { | |
941 | goto done; | |
942 | } | |
943 | ||
944 | /* When the block job completes, the BlockBackend reference will point to | |
945 | * the old backing file. In order to avoid that the top image is already | |
946 | * deleted, so we can still empty it afterwards, increment the reference | |
947 | * counter here preemptively. */ | |
948 | if (!drop) { | |
949 | bdrv_ref(bs); | |
950 | } | |
951 | ||
952 | run_block_job(bs->job, &local_err); | |
953 | if (local_err) { | |
954 | goto unref_backing; | |
955 | } | |
956 | ||
957 | if (!drop && bs->drv->bdrv_make_empty) { | |
958 | ret = bs->drv->bdrv_make_empty(bs); | |
959 | if (ret) { | |
960 | error_setg_errno(&local_err, -ret, "Could not empty %s", | |
961 | filename); | |
962 | goto unref_backing; | |
963 | } | |
964 | } | |
965 | ||
966 | unref_backing: | |
967 | if (!drop) { | |
968 | bdrv_unref(bs); | |
969 | } | |
970 | ||
971 | done: | |
972 | qemu_progress_end(); | |
973 | ||
974 | blk_unref(blk); | |
975 | ||
976 | if (local_err) { | |
977 | error_report_err(local_err); | |
978 | return 1; | |
979 | } | |
980 | ||
981 | qprintf(quiet, "Image committed.\n"); | |
982 | return 0; | |
983 | } | |
984 | ||
985 | /* | |
986 | * Returns true iff the first sector pointed to by 'buf' contains at least | |
987 | * a non-NUL byte. | |
988 | * | |
989 | * 'pnum' is set to the number of sectors (including and immediately following | |
990 | * the first one) that are known to be in the same allocated/unallocated state. | |
991 | */ | |
992 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) | |
993 | { | |
994 | bool is_zero; | |
995 | int i; | |
996 | ||
997 | if (n <= 0) { | |
998 | *pnum = 0; | |
999 | return 0; | |
1000 | } | |
1001 | is_zero = buffer_is_zero(buf, 512); | |
1002 | for(i = 1; i < n; i++) { | |
1003 | buf += 512; | |
1004 | if (is_zero != buffer_is_zero(buf, 512)) { | |
1005 | break; | |
1006 | } | |
1007 | } | |
1008 | *pnum = i; | |
1009 | return !is_zero; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Like is_allocated_sectors, but if the buffer starts with a used sector, | |
1014 | * up to 'min' consecutive sectors containing zeros are ignored. This avoids | |
1015 | * breaking up write requests for only small sparse areas. | |
1016 | */ | |
1017 | static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, | |
1018 | int min) | |
1019 | { | |
1020 | int ret; | |
1021 | int num_checked, num_used; | |
1022 | ||
1023 | if (n < min) { | |
1024 | min = n; | |
1025 | } | |
1026 | ||
1027 | ret = is_allocated_sectors(buf, n, pnum); | |
1028 | if (!ret) { | |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | num_used = *pnum; | |
1033 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1034 | n -= *pnum; | |
1035 | num_checked = num_used; | |
1036 | ||
1037 | while (n > 0) { | |
1038 | ret = is_allocated_sectors(buf, n, pnum); | |
1039 | ||
1040 | buf += BDRV_SECTOR_SIZE * *pnum; | |
1041 | n -= *pnum; | |
1042 | num_checked += *pnum; | |
1043 | if (ret) { | |
1044 | num_used = num_checked; | |
1045 | } else if (*pnum >= min) { | |
1046 | break; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | *pnum = num_used; | |
1051 | return 1; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Compares two buffers sector by sector. Returns 0 if the first sector of both | |
1056 | * buffers matches, non-zero otherwise. | |
1057 | * | |
1058 | * pnum is set to the number of sectors (including and immediately following | |
1059 | * the first one) that are known to have the same comparison result | |
1060 | */ | |
1061 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, | |
1062 | int *pnum) | |
1063 | { | |
1064 | bool res; | |
1065 | int i; | |
1066 | ||
1067 | if (n <= 0) { | |
1068 | *pnum = 0; | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | res = !!memcmp(buf1, buf2, 512); | |
1073 | for(i = 1; i < n; i++) { | |
1074 | buf1 += 512; | |
1075 | buf2 += 512; | |
1076 | ||
1077 | if (!!memcmp(buf1, buf2, 512) != res) { | |
1078 | break; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | *pnum = i; | |
1083 | return res; | |
1084 | } | |
1085 | ||
1086 | #define IO_BUF_SIZE (2 * 1024 * 1024) | |
1087 | ||
1088 | static int64_t sectors_to_bytes(int64_t sectors) | |
1089 | { | |
1090 | return sectors << BDRV_SECTOR_BITS; | |
1091 | } | |
1092 | ||
1093 | static int64_t sectors_to_process(int64_t total, int64_t from) | |
1094 | { | |
1095 | return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * Check if passed sectors are empty (not allocated or contain only 0 bytes) | |
1100 | * | |
1101 | * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero | |
1102 | * data and negative value on error. | |
1103 | * | |
1104 | * @param blk: BlockBackend for the image | |
1105 | * @param sect_num: Number of first sector to check | |
1106 | * @param sect_count: Number of sectors to check | |
1107 | * @param filename: Name of disk file we are checking (logging purpose) | |
1108 | * @param buffer: Allocated buffer for storing read data | |
1109 | * @param quiet: Flag for quiet mode | |
1110 | */ | |
1111 | static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, | |
1112 | int sect_count, const char *filename, | |
1113 | uint8_t *buffer, bool quiet) | |
1114 | { | |
1115 | int pnum, ret = 0; | |
1116 | ret = blk_pread(blk, sect_num << BDRV_SECTOR_BITS, buffer, | |
1117 | sect_count << BDRV_SECTOR_BITS); | |
1118 | if (ret < 0) { | |
1119 | error_report("Error while reading offset %" PRId64 " of %s: %s", | |
1120 | sectors_to_bytes(sect_num), filename, strerror(-ret)); | |
1121 | return ret; | |
1122 | } | |
1123 | ret = is_allocated_sectors(buffer, sect_count, &pnum); | |
1124 | if (ret || pnum != sect_count) { | |
1125 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1126 | sectors_to_bytes(ret ? sect_num : sect_num + pnum)); | |
1127 | return 1; | |
1128 | } | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * Compares two images. Exit codes: | |
1135 | * | |
1136 | * 0 - Images are identical | |
1137 | * 1 - Images differ | |
1138 | * >1 - Error occurred | |
1139 | */ | |
1140 | static int img_compare(int argc, char **argv) | |
1141 | { | |
1142 | const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; | |
1143 | BlockBackend *blk1, *blk2; | |
1144 | BlockDriverState *bs1, *bs2; | |
1145 | int64_t total_sectors1, total_sectors2; | |
1146 | uint8_t *buf1 = NULL, *buf2 = NULL; | |
1147 | int pnum1, pnum2; | |
1148 | int allocated1, allocated2; | |
1149 | int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ | |
1150 | bool progress = false, quiet = false, strict = false; | |
1151 | int flags; | |
1152 | bool writethrough; | |
1153 | int64_t total_sectors; | |
1154 | int64_t sector_num = 0; | |
1155 | int64_t nb_sectors; | |
1156 | int c, pnum; | |
1157 | uint64_t progress_base; | |
1158 | bool image_opts = false; | |
1159 | ||
1160 | cache = BDRV_DEFAULT_CACHE; | |
1161 | for (;;) { | |
1162 | static const struct option long_options[] = { | |
1163 | {"help", no_argument, 0, 'h'}, | |
1164 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1165 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1166 | {0, 0, 0, 0} | |
1167 | }; | |
1168 | c = getopt_long(argc, argv, "hf:F:T:pqs", | |
1169 | long_options, NULL); | |
1170 | if (c == -1) { | |
1171 | break; | |
1172 | } | |
1173 | switch (c) { | |
1174 | case '?': | |
1175 | case 'h': | |
1176 | help(); | |
1177 | break; | |
1178 | case 'f': | |
1179 | fmt1 = optarg; | |
1180 | break; | |
1181 | case 'F': | |
1182 | fmt2 = optarg; | |
1183 | break; | |
1184 | case 'T': | |
1185 | cache = optarg; | |
1186 | break; | |
1187 | case 'p': | |
1188 | progress = true; | |
1189 | break; | |
1190 | case 'q': | |
1191 | quiet = true; | |
1192 | break; | |
1193 | case 's': | |
1194 | strict = true; | |
1195 | break; | |
1196 | case OPTION_OBJECT: { | |
1197 | QemuOpts *opts; | |
1198 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1199 | optarg, true); | |
1200 | if (!opts) { | |
1201 | ret = 2; | |
1202 | goto out4; | |
1203 | } | |
1204 | } break; | |
1205 | case OPTION_IMAGE_OPTS: | |
1206 | image_opts = true; | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | /* Progress is not shown in Quiet mode */ | |
1212 | if (quiet) { | |
1213 | progress = false; | |
1214 | } | |
1215 | ||
1216 | ||
1217 | if (optind != argc - 2) { | |
1218 | error_exit("Expecting two image file names"); | |
1219 | } | |
1220 | filename1 = argv[optind++]; | |
1221 | filename2 = argv[optind++]; | |
1222 | ||
1223 | if (qemu_opts_foreach(&qemu_object_opts, | |
1224 | user_creatable_add_opts_foreach, | |
1225 | NULL, NULL)) { | |
1226 | ret = 2; | |
1227 | goto out4; | |
1228 | } | |
1229 | ||
1230 | /* Initialize before goto out */ | |
1231 | qemu_progress_init(progress, 2.0); | |
1232 | ||
1233 | flags = 0; | |
1234 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
1235 | if (ret < 0) { | |
1236 | error_report("Invalid source cache option: %s", cache); | |
1237 | ret = 2; | |
1238 | goto out3; | |
1239 | } | |
1240 | ||
1241 | blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); | |
1242 | if (!blk1) { | |
1243 | ret = 2; | |
1244 | goto out3; | |
1245 | } | |
1246 | ||
1247 | blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); | |
1248 | if (!blk2) { | |
1249 | ret = 2; | |
1250 | goto out2; | |
1251 | } | |
1252 | bs1 = blk_bs(blk1); | |
1253 | bs2 = blk_bs(blk2); | |
1254 | ||
1255 | buf1 = blk_blockalign(blk1, IO_BUF_SIZE); | |
1256 | buf2 = blk_blockalign(blk2, IO_BUF_SIZE); | |
1257 | total_sectors1 = blk_nb_sectors(blk1); | |
1258 | if (total_sectors1 < 0) { | |
1259 | error_report("Can't get size of %s: %s", | |
1260 | filename1, strerror(-total_sectors1)); | |
1261 | ret = 4; | |
1262 | goto out; | |
1263 | } | |
1264 | total_sectors2 = blk_nb_sectors(blk2); | |
1265 | if (total_sectors2 < 0) { | |
1266 | error_report("Can't get size of %s: %s", | |
1267 | filename2, strerror(-total_sectors2)); | |
1268 | ret = 4; | |
1269 | goto out; | |
1270 | } | |
1271 | total_sectors = MIN(total_sectors1, total_sectors2); | |
1272 | progress_base = MAX(total_sectors1, total_sectors2); | |
1273 | ||
1274 | qemu_progress_print(0, 100); | |
1275 | ||
1276 | if (strict && total_sectors1 != total_sectors2) { | |
1277 | ret = 1; | |
1278 | qprintf(quiet, "Strict mode: Image size mismatch!\n"); | |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | for (;;) { | |
1283 | int64_t status1, status2; | |
1284 | BlockDriverState *file; | |
1285 | ||
1286 | nb_sectors = sectors_to_process(total_sectors, sector_num); | |
1287 | if (nb_sectors <= 0) { | |
1288 | break; | |
1289 | } | |
1290 | status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, | |
1291 | total_sectors1 - sector_num, | |
1292 | &pnum1, &file); | |
1293 | if (status1 < 0) { | |
1294 | ret = 3; | |
1295 | error_report("Sector allocation test failed for %s", filename1); | |
1296 | goto out; | |
1297 | } | |
1298 | allocated1 = status1 & BDRV_BLOCK_ALLOCATED; | |
1299 | ||
1300 | status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, | |
1301 | total_sectors2 - sector_num, | |
1302 | &pnum2, &file); | |
1303 | if (status2 < 0) { | |
1304 | ret = 3; | |
1305 | error_report("Sector allocation test failed for %s", filename2); | |
1306 | goto out; | |
1307 | } | |
1308 | allocated2 = status2 & BDRV_BLOCK_ALLOCATED; | |
1309 | if (pnum1) { | |
1310 | nb_sectors = MIN(nb_sectors, pnum1); | |
1311 | } | |
1312 | if (pnum2) { | |
1313 | nb_sectors = MIN(nb_sectors, pnum2); | |
1314 | } | |
1315 | ||
1316 | if (strict) { | |
1317 | if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != | |
1318 | (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { | |
1319 | ret = 1; | |
1320 | qprintf(quiet, "Strict mode: Offset %" PRId64 | |
1321 | " block status mismatch!\n", | |
1322 | sectors_to_bytes(sector_num)); | |
1323 | goto out; | |
1324 | } | |
1325 | } | |
1326 | if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { | |
1327 | nb_sectors = MIN(pnum1, pnum2); | |
1328 | } else if (allocated1 == allocated2) { | |
1329 | if (allocated1) { | |
1330 | ret = blk_pread(blk1, sector_num << BDRV_SECTOR_BITS, buf1, | |
1331 | nb_sectors << BDRV_SECTOR_BITS); | |
1332 | if (ret < 0) { | |
1333 | error_report("Error while reading offset %" PRId64 " of %s:" | |
1334 | " %s", sectors_to_bytes(sector_num), filename1, | |
1335 | strerror(-ret)); | |
1336 | ret = 4; | |
1337 | goto out; | |
1338 | } | |
1339 | ret = blk_pread(blk2, sector_num << BDRV_SECTOR_BITS, buf2, | |
1340 | nb_sectors << BDRV_SECTOR_BITS); | |
1341 | if (ret < 0) { | |
1342 | error_report("Error while reading offset %" PRId64 | |
1343 | " of %s: %s", sectors_to_bytes(sector_num), | |
1344 | filename2, strerror(-ret)); | |
1345 | ret = 4; | |
1346 | goto out; | |
1347 | } | |
1348 | ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); | |
1349 | if (ret || pnum != nb_sectors) { | |
1350 | qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", | |
1351 | sectors_to_bytes( | |
1352 | ret ? sector_num : sector_num + pnum)); | |
1353 | ret = 1; | |
1354 | goto out; | |
1355 | } | |
1356 | } | |
1357 | } else { | |
1358 | ||
1359 | if (allocated1) { | |
1360 | ret = check_empty_sectors(blk1, sector_num, nb_sectors, | |
1361 | filename1, buf1, quiet); | |
1362 | } else { | |
1363 | ret = check_empty_sectors(blk2, sector_num, nb_sectors, | |
1364 | filename2, buf1, quiet); | |
1365 | } | |
1366 | if (ret) { | |
1367 | if (ret < 0) { | |
1368 | error_report("Error while reading offset %" PRId64 ": %s", | |
1369 | sectors_to_bytes(sector_num), strerror(-ret)); | |
1370 | ret = 4; | |
1371 | } | |
1372 | goto out; | |
1373 | } | |
1374 | } | |
1375 | sector_num += nb_sectors; | |
1376 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1377 | } | |
1378 | ||
1379 | if (total_sectors1 != total_sectors2) { | |
1380 | BlockBackend *blk_over; | |
1381 | int64_t total_sectors_over; | |
1382 | const char *filename_over; | |
1383 | ||
1384 | qprintf(quiet, "Warning: Image size mismatch!\n"); | |
1385 | if (total_sectors1 > total_sectors2) { | |
1386 | total_sectors_over = total_sectors1; | |
1387 | blk_over = blk1; | |
1388 | filename_over = filename1; | |
1389 | } else { | |
1390 | total_sectors_over = total_sectors2; | |
1391 | blk_over = blk2; | |
1392 | filename_over = filename2; | |
1393 | } | |
1394 | ||
1395 | for (;;) { | |
1396 | nb_sectors = sectors_to_process(total_sectors_over, sector_num); | |
1397 | if (nb_sectors <= 0) { | |
1398 | break; | |
1399 | } | |
1400 | ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, | |
1401 | nb_sectors, &pnum); | |
1402 | if (ret < 0) { | |
1403 | ret = 3; | |
1404 | error_report("Sector allocation test failed for %s", | |
1405 | filename_over); | |
1406 | goto out; | |
1407 | ||
1408 | } | |
1409 | nb_sectors = pnum; | |
1410 | if (ret) { | |
1411 | ret = check_empty_sectors(blk_over, sector_num, nb_sectors, | |
1412 | filename_over, buf1, quiet); | |
1413 | if (ret) { | |
1414 | if (ret < 0) { | |
1415 | error_report("Error while reading offset %" PRId64 | |
1416 | " of %s: %s", sectors_to_bytes(sector_num), | |
1417 | filename_over, strerror(-ret)); | |
1418 | ret = 4; | |
1419 | } | |
1420 | goto out; | |
1421 | } | |
1422 | } | |
1423 | sector_num += nb_sectors; | |
1424 | qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | qprintf(quiet, "Images are identical.\n"); | |
1429 | ret = 0; | |
1430 | ||
1431 | out: | |
1432 | qemu_vfree(buf1); | |
1433 | qemu_vfree(buf2); | |
1434 | blk_unref(blk2); | |
1435 | out2: | |
1436 | blk_unref(blk1); | |
1437 | out3: | |
1438 | qemu_progress_end(); | |
1439 | out4: | |
1440 | return ret; | |
1441 | } | |
1442 | ||
1443 | enum ImgConvertBlockStatus { | |
1444 | BLK_DATA, | |
1445 | BLK_ZERO, | |
1446 | BLK_BACKING_FILE, | |
1447 | }; | |
1448 | ||
1449 | typedef struct ImgConvertState { | |
1450 | BlockBackend **src; | |
1451 | int64_t *src_sectors; | |
1452 | int src_cur, src_num; | |
1453 | int64_t src_cur_offset; | |
1454 | int64_t total_sectors; | |
1455 | int64_t allocated_sectors; | |
1456 | enum ImgConvertBlockStatus status; | |
1457 | int64_t sector_next_status; | |
1458 | BlockBackend *target; | |
1459 | bool has_zero_init; | |
1460 | bool compressed; | |
1461 | bool target_has_backing; | |
1462 | int min_sparse; | |
1463 | size_t cluster_sectors; | |
1464 | size_t buf_sectors; | |
1465 | } ImgConvertState; | |
1466 | ||
1467 | static void convert_select_part(ImgConvertState *s, int64_t sector_num) | |
1468 | { | |
1469 | assert(sector_num >= s->src_cur_offset); | |
1470 | while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { | |
1471 | s->src_cur_offset += s->src_sectors[s->src_cur]; | |
1472 | s->src_cur++; | |
1473 | assert(s->src_cur < s->src_num); | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) | |
1478 | { | |
1479 | int64_t ret; | |
1480 | int n; | |
1481 | ||
1482 | convert_select_part(s, sector_num); | |
1483 | ||
1484 | assert(s->total_sectors > sector_num); | |
1485 | n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); | |
1486 | ||
1487 | if (s->sector_next_status <= sector_num) { | |
1488 | BlockDriverState *file; | |
1489 | ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), | |
1490 | sector_num - s->src_cur_offset, | |
1491 | n, &n, &file); | |
1492 | if (ret < 0) { | |
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | if (ret & BDRV_BLOCK_ZERO) { | |
1497 | s->status = BLK_ZERO; | |
1498 | } else if (ret & BDRV_BLOCK_DATA) { | |
1499 | s->status = BLK_DATA; | |
1500 | } else if (!s->target_has_backing) { | |
1501 | /* Without a target backing file we must copy over the contents of | |
1502 | * the backing file as well. */ | |
1503 | /* Check block status of the backing file chain to avoid | |
1504 | * needlessly reading zeroes and limiting the iteration to the | |
1505 | * buffer size */ | |
1506 | ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL, | |
1507 | sector_num - s->src_cur_offset, | |
1508 | n, &n, &file); | |
1509 | if (ret < 0) { | |
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | if (ret & BDRV_BLOCK_ZERO) { | |
1514 | s->status = BLK_ZERO; | |
1515 | } else { | |
1516 | s->status = BLK_DATA; | |
1517 | } | |
1518 | } else { | |
1519 | s->status = BLK_BACKING_FILE; | |
1520 | } | |
1521 | ||
1522 | s->sector_next_status = sector_num + n; | |
1523 | } | |
1524 | ||
1525 | n = MIN(n, s->sector_next_status - sector_num); | |
1526 | if (s->status == BLK_DATA) { | |
1527 | n = MIN(n, s->buf_sectors); | |
1528 | } | |
1529 | ||
1530 | /* We need to write complete clusters for compressed images, so if an | |
1531 | * unallocated area is shorter than that, we must consider the whole | |
1532 | * cluster allocated. */ | |
1533 | if (s->compressed) { | |
1534 | if (n < s->cluster_sectors) { | |
1535 | n = MIN(s->cluster_sectors, s->total_sectors - sector_num); | |
1536 | s->status = BLK_DATA; | |
1537 | } else { | |
1538 | n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | return n; | |
1543 | } | |
1544 | ||
1545 | static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1546 | uint8_t *buf) | |
1547 | { | |
1548 | int n; | |
1549 | int ret; | |
1550 | ||
1551 | assert(nb_sectors <= s->buf_sectors); | |
1552 | while (nb_sectors > 0) { | |
1553 | BlockBackend *blk; | |
1554 | int64_t bs_sectors; | |
1555 | ||
1556 | /* In the case of compression with multiple source files, we can get a | |
1557 | * nb_sectors that spreads into the next part. So we must be able to | |
1558 | * read across multiple BDSes for one convert_read() call. */ | |
1559 | convert_select_part(s, sector_num); | |
1560 | blk = s->src[s->src_cur]; | |
1561 | bs_sectors = s->src_sectors[s->src_cur]; | |
1562 | ||
1563 | n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); | |
1564 | ret = blk_pread(blk, | |
1565 | (sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS, | |
1566 | buf, n << BDRV_SECTOR_BITS); | |
1567 | if (ret < 0) { | |
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | sector_num += n; | |
1572 | nb_sectors -= n; | |
1573 | buf += n * BDRV_SECTOR_SIZE; | |
1574 | } | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, | |
1580 | const uint8_t *buf) | |
1581 | { | |
1582 | int ret; | |
1583 | ||
1584 | while (nb_sectors > 0) { | |
1585 | int n = nb_sectors; | |
1586 | ||
1587 | switch (s->status) { | |
1588 | case BLK_BACKING_FILE: | |
1589 | /* If we have a backing file, leave clusters unallocated that are | |
1590 | * unallocated in the source image, so that the backing file is | |
1591 | * visible at the respective offset. */ | |
1592 | assert(s->target_has_backing); | |
1593 | break; | |
1594 | ||
1595 | case BLK_DATA: | |
1596 | /* We must always write compressed clusters as a whole, so don't | |
1597 | * try to find zeroed parts in the buffer. We can only save the | |
1598 | * write if the buffer is completely zeroed and we're allowed to | |
1599 | * keep the target sparse. */ | |
1600 | if (s->compressed) { | |
1601 | if (s->has_zero_init && s->min_sparse && | |
1602 | buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) | |
1603 | { | |
1604 | assert(!s->target_has_backing); | |
1605 | break; | |
1606 | } | |
1607 | ||
1608 | ret = blk_pwrite_compressed(s->target, | |
1609 | sector_num << BDRV_SECTOR_BITS, | |
1610 | buf, n << BDRV_SECTOR_BITS); | |
1611 | if (ret < 0) { | |
1612 | return ret; | |
1613 | } | |
1614 | break; | |
1615 | } | |
1616 | ||
1617 | /* If there is real non-zero data or we're told to keep the target | |
1618 | * fully allocated (-S 0), we must write it. Otherwise we can treat | |
1619 | * it as zero sectors. */ | |
1620 | if (!s->min_sparse || | |
1621 | is_allocated_sectors_min(buf, n, &n, s->min_sparse)) | |
1622 | { | |
1623 | ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, | |
1624 | buf, n << BDRV_SECTOR_BITS, 0); | |
1625 | if (ret < 0) { | |
1626 | return ret; | |
1627 | } | |
1628 | break; | |
1629 | } | |
1630 | /* fall-through */ | |
1631 | ||
1632 | case BLK_ZERO: | |
1633 | if (s->has_zero_init) { | |
1634 | break; | |
1635 | } | |
1636 | ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS, | |
1637 | n << BDRV_SECTOR_BITS, 0); | |
1638 | if (ret < 0) { | |
1639 | return ret; | |
1640 | } | |
1641 | break; | |
1642 | } | |
1643 | ||
1644 | sector_num += n; | |
1645 | nb_sectors -= n; | |
1646 | buf += n * BDRV_SECTOR_SIZE; | |
1647 | } | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | static int convert_do_copy(ImgConvertState *s) | |
1653 | { | |
1654 | uint8_t *buf = NULL; | |
1655 | int64_t sector_num, allocated_done; | |
1656 | int ret; | |
1657 | int n; | |
1658 | ||
1659 | /* Check whether we have zero initialisation or can get it efficiently */ | |
1660 | s->has_zero_init = s->min_sparse && !s->target_has_backing | |
1661 | ? bdrv_has_zero_init(blk_bs(s->target)) | |
1662 | : false; | |
1663 | ||
1664 | if (!s->has_zero_init && !s->target_has_backing && | |
1665 | bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) | |
1666 | { | |
1667 | ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP); | |
1668 | if (ret == 0) { | |
1669 | s->has_zero_init = true; | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | /* Allocate buffer for copied data. For compressed images, only one cluster | |
1674 | * can be copied at a time. */ | |
1675 | if (s->compressed) { | |
1676 | if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { | |
1677 | error_report("invalid cluster size"); | |
1678 | ret = -EINVAL; | |
1679 | goto fail; | |
1680 | } | |
1681 | s->buf_sectors = s->cluster_sectors; | |
1682 | } | |
1683 | buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); | |
1684 | ||
1685 | /* Calculate allocated sectors for progress */ | |
1686 | s->allocated_sectors = 0; | |
1687 | sector_num = 0; | |
1688 | while (sector_num < s->total_sectors) { | |
1689 | n = convert_iteration_sectors(s, sector_num); | |
1690 | if (n < 0) { | |
1691 | ret = n; | |
1692 | goto fail; | |
1693 | } | |
1694 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1695 | { | |
1696 | s->allocated_sectors += n; | |
1697 | } | |
1698 | sector_num += n; | |
1699 | } | |
1700 | ||
1701 | /* Do the copy */ | |
1702 | s->src_cur = 0; | |
1703 | s->src_cur_offset = 0; | |
1704 | s->sector_next_status = 0; | |
1705 | ||
1706 | sector_num = 0; | |
1707 | allocated_done = 0; | |
1708 | ||
1709 | while (sector_num < s->total_sectors) { | |
1710 | n = convert_iteration_sectors(s, sector_num); | |
1711 | if (n < 0) { | |
1712 | ret = n; | |
1713 | goto fail; | |
1714 | } | |
1715 | if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) | |
1716 | { | |
1717 | allocated_done += n; | |
1718 | qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, | |
1719 | 0); | |
1720 | } | |
1721 | ||
1722 | if (s->status == BLK_DATA) { | |
1723 | ret = convert_read(s, sector_num, n, buf); | |
1724 | if (ret < 0) { | |
1725 | error_report("error while reading sector %" PRId64 | |
1726 | ": %s", sector_num, strerror(-ret)); | |
1727 | goto fail; | |
1728 | } | |
1729 | } else if (!s->min_sparse && s->status == BLK_ZERO) { | |
1730 | n = MIN(n, s->buf_sectors); | |
1731 | memset(buf, 0, n * BDRV_SECTOR_SIZE); | |
1732 | s->status = BLK_DATA; | |
1733 | } | |
1734 | ||
1735 | ret = convert_write(s, sector_num, n, buf); | |
1736 | if (ret < 0) { | |
1737 | error_report("error while writing sector %" PRId64 | |
1738 | ": %s", sector_num, strerror(-ret)); | |
1739 | goto fail; | |
1740 | } | |
1741 | ||
1742 | sector_num += n; | |
1743 | } | |
1744 | ||
1745 | if (s->compressed) { | |
1746 | /* signal EOF to align */ | |
1747 | ret = blk_pwrite_compressed(s->target, 0, NULL, 0); | |
1748 | if (ret < 0) { | |
1749 | goto fail; | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | ret = 0; | |
1754 | fail: | |
1755 | qemu_vfree(buf); | |
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | static int img_convert(int argc, char **argv) | |
1760 | { | |
1761 | int c, bs_n, bs_i, compress, cluster_sectors, skip_create; | |
1762 | int64_t ret = 0; | |
1763 | int progress = 0, flags, src_flags; | |
1764 | bool writethrough, src_writethrough; | |
1765 | const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; | |
1766 | BlockDriver *drv, *proto_drv; | |
1767 | BlockBackend **blk = NULL, *out_blk = NULL; | |
1768 | BlockDriverState **bs = NULL, *out_bs = NULL; | |
1769 | int64_t total_sectors; | |
1770 | int64_t *bs_sectors = NULL; | |
1771 | size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; | |
1772 | BlockDriverInfo bdi; | |
1773 | QemuOpts *opts = NULL; | |
1774 | QemuOptsList *create_opts = NULL; | |
1775 | const char *out_baseimg_param; | |
1776 | char *options = NULL; | |
1777 | const char *snapshot_name = NULL; | |
1778 | int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ | |
1779 | bool quiet = false; | |
1780 | Error *local_err = NULL; | |
1781 | QemuOpts *sn_opts = NULL; | |
1782 | ImgConvertState state; | |
1783 | bool image_opts = false; | |
1784 | ||
1785 | fmt = NULL; | |
1786 | out_fmt = "raw"; | |
1787 | cache = "unsafe"; | |
1788 | src_cache = BDRV_DEFAULT_CACHE; | |
1789 | out_baseimg = NULL; | |
1790 | compress = 0; | |
1791 | skip_create = 0; | |
1792 | for(;;) { | |
1793 | static const struct option long_options[] = { | |
1794 | {"help", no_argument, 0, 'h'}, | |
1795 | {"object", required_argument, 0, OPTION_OBJECT}, | |
1796 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
1797 | {0, 0, 0, 0} | |
1798 | }; | |
1799 | c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn", | |
1800 | long_options, NULL); | |
1801 | if (c == -1) { | |
1802 | break; | |
1803 | } | |
1804 | switch(c) { | |
1805 | case '?': | |
1806 | case 'h': | |
1807 | help(); | |
1808 | break; | |
1809 | case 'f': | |
1810 | fmt = optarg; | |
1811 | break; | |
1812 | case 'O': | |
1813 | out_fmt = optarg; | |
1814 | break; | |
1815 | case 'B': | |
1816 | out_baseimg = optarg; | |
1817 | break; | |
1818 | case 'c': | |
1819 | compress = 1; | |
1820 | break; | |
1821 | case 'e': | |
1822 | error_report("option -e is deprecated, please use \'-o " | |
1823 | "encryption\' instead!"); | |
1824 | ret = -1; | |
1825 | goto fail_getopt; | |
1826 | case '6': | |
1827 | error_report("option -6 is deprecated, please use \'-o " | |
1828 | "compat6\' instead!"); | |
1829 | ret = -1; | |
1830 | goto fail_getopt; | |
1831 | case 'o': | |
1832 | if (!is_valid_option_list(optarg)) { | |
1833 | error_report("Invalid option list: %s", optarg); | |
1834 | ret = -1; | |
1835 | goto fail_getopt; | |
1836 | } | |
1837 | if (!options) { | |
1838 | options = g_strdup(optarg); | |
1839 | } else { | |
1840 | char *old_options = options; | |
1841 | options = g_strdup_printf("%s,%s", options, optarg); | |
1842 | g_free(old_options); | |
1843 | } | |
1844 | break; | |
1845 | case 's': | |
1846 | snapshot_name = optarg; | |
1847 | break; | |
1848 | case 'l': | |
1849 | if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { | |
1850 | sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, | |
1851 | optarg, false); | |
1852 | if (!sn_opts) { | |
1853 | error_report("Failed in parsing snapshot param '%s'", | |
1854 | optarg); | |
1855 | ret = -1; | |
1856 | goto fail_getopt; | |
1857 | } | |
1858 | } else { | |
1859 | snapshot_name = optarg; | |
1860 | } | |
1861 | break; | |
1862 | case 'S': | |
1863 | { | |
1864 | int64_t sval; | |
1865 | char *end; | |
1866 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
1867 | if (sval < 0 || *end) { | |
1868 | error_report("Invalid minimum zero buffer size for sparse output specified"); | |
1869 | ret = -1; | |
1870 | goto fail_getopt; | |
1871 | } | |
1872 | ||
1873 | min_sparse = sval / BDRV_SECTOR_SIZE; | |
1874 | break; | |
1875 | } | |
1876 | case 'p': | |
1877 | progress = 1; | |
1878 | break; | |
1879 | case 't': | |
1880 | cache = optarg; | |
1881 | break; | |
1882 | case 'T': | |
1883 | src_cache = optarg; | |
1884 | break; | |
1885 | case 'q': | |
1886 | quiet = true; | |
1887 | break; | |
1888 | case 'n': | |
1889 | skip_create = 1; | |
1890 | break; | |
1891 | case OPTION_OBJECT: | |
1892 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
1893 | optarg, true); | |
1894 | if (!opts) { | |
1895 | goto fail_getopt; | |
1896 | } | |
1897 | break; | |
1898 | case OPTION_IMAGE_OPTS: | |
1899 | image_opts = true; | |
1900 | break; | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | if (qemu_opts_foreach(&qemu_object_opts, | |
1905 | user_creatable_add_opts_foreach, | |
1906 | NULL, NULL)) { | |
1907 | goto fail_getopt; | |
1908 | } | |
1909 | ||
1910 | /* Initialize before goto out */ | |
1911 | if (quiet) { | |
1912 | progress = 0; | |
1913 | } | |
1914 | qemu_progress_init(progress, 1.0); | |
1915 | ||
1916 | bs_n = argc - optind - 1; | |
1917 | out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; | |
1918 | ||
1919 | if (options && has_help_option(options)) { | |
1920 | ret = print_block_option_help(out_filename, out_fmt); | |
1921 | goto out; | |
1922 | } | |
1923 | ||
1924 | if (bs_n < 1) { | |
1925 | error_exit("Must specify image file name"); | |
1926 | } | |
1927 | ||
1928 | ||
1929 | if (bs_n > 1 && out_baseimg) { | |
1930 | error_report("-B makes no sense when concatenating multiple input " | |
1931 | "images"); | |
1932 | ret = -1; | |
1933 | goto out; | |
1934 | } | |
1935 | ||
1936 | src_flags = 0; | |
1937 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
1938 | if (ret < 0) { | |
1939 | error_report("Invalid source cache option: %s", src_cache); | |
1940 | goto out; | |
1941 | } | |
1942 | ||
1943 | qemu_progress_print(0, 100); | |
1944 | ||
1945 | blk = g_new0(BlockBackend *, bs_n); | |
1946 | bs = g_new0(BlockDriverState *, bs_n); | |
1947 | bs_sectors = g_new(int64_t, bs_n); | |
1948 | ||
1949 | total_sectors = 0; | |
1950 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
1951 | blk[bs_i] = img_open(image_opts, argv[optind + bs_i], | |
1952 | fmt, src_flags, src_writethrough, quiet); | |
1953 | if (!blk[bs_i]) { | |
1954 | ret = -1; | |
1955 | goto out; | |
1956 | } | |
1957 | bs[bs_i] = blk_bs(blk[bs_i]); | |
1958 | bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); | |
1959 | if (bs_sectors[bs_i] < 0) { | |
1960 | error_report("Could not get size of %s: %s", | |
1961 | argv[optind + bs_i], strerror(-bs_sectors[bs_i])); | |
1962 | ret = -1; | |
1963 | goto out; | |
1964 | } | |
1965 | total_sectors += bs_sectors[bs_i]; | |
1966 | } | |
1967 | ||
1968 | if (sn_opts) { | |
1969 | ret = bdrv_snapshot_load_tmp(bs[0], | |
1970 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), | |
1971 | qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), | |
1972 | &local_err); | |
1973 | } else if (snapshot_name != NULL) { | |
1974 | if (bs_n > 1) { | |
1975 | error_report("No support for concatenating multiple snapshot"); | |
1976 | ret = -1; | |
1977 | goto out; | |
1978 | } | |
1979 | ||
1980 | bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); | |
1981 | } | |
1982 | if (local_err) { | |
1983 | error_reportf_err(local_err, "Failed to load snapshot: "); | |
1984 | ret = -1; | |
1985 | goto out; | |
1986 | } | |
1987 | ||
1988 | /* Find driver and parse its options */ | |
1989 | drv = bdrv_find_format(out_fmt); | |
1990 | if (!drv) { | |
1991 | error_report("Unknown file format '%s'", out_fmt); | |
1992 | ret = -1; | |
1993 | goto out; | |
1994 | } | |
1995 | ||
1996 | proto_drv = bdrv_find_protocol(out_filename, true, &local_err); | |
1997 | if (!proto_drv) { | |
1998 | error_report_err(local_err); | |
1999 | ret = -1; | |
2000 | goto out; | |
2001 | } | |
2002 | ||
2003 | if (!skip_create) { | |
2004 | if (!drv->create_opts) { | |
2005 | error_report("Format driver '%s' does not support image creation", | |
2006 | drv->format_name); | |
2007 | ret = -1; | |
2008 | goto out; | |
2009 | } | |
2010 | ||
2011 | if (!proto_drv->create_opts) { | |
2012 | error_report("Protocol driver '%s' does not support image creation", | |
2013 | proto_drv->format_name); | |
2014 | ret = -1; | |
2015 | goto out; | |
2016 | } | |
2017 | ||
2018 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
2019 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
2020 | ||
2021 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
2022 | if (options) { | |
2023 | qemu_opts_do_parse(opts, options, NULL, &local_err); | |
2024 | if (local_err) { | |
2025 | error_report_err(local_err); | |
2026 | ret = -1; | |
2027 | goto out; | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, | |
2032 | &error_abort); | |
2033 | ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); | |
2034 | if (ret < 0) { | |
2035 | goto out; | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | /* Get backing file name if -o backing_file was used */ | |
2040 | out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); | |
2041 | if (out_baseimg_param) { | |
2042 | out_baseimg = out_baseimg_param; | |
2043 | } | |
2044 | ||
2045 | /* Check if compression is supported */ | |
2046 | if (compress) { | |
2047 | bool encryption = | |
2048 | qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); | |
2049 | const char *preallocation = | |
2050 | qemu_opt_get(opts, BLOCK_OPT_PREALLOC); | |
2051 | ||
2052 | if (!drv->bdrv_co_pwritev_compressed) { | |
2053 | error_report("Compression not supported for this file format"); | |
2054 | ret = -1; | |
2055 | goto out; | |
2056 | } | |
2057 | ||
2058 | if (encryption) { | |
2059 | error_report("Compression and encryption not supported at " | |
2060 | "the same time"); | |
2061 | ret = -1; | |
2062 | goto out; | |
2063 | } | |
2064 | ||
2065 | if (preallocation | |
2066 | && strcmp(preallocation, "off")) | |
2067 | { | |
2068 | error_report("Compression and preallocation not supported at " | |
2069 | "the same time"); | |
2070 | ret = -1; | |
2071 | goto out; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | if (!skip_create) { | |
2076 | /* Create the new image */ | |
2077 | ret = bdrv_create(drv, out_filename, opts, &local_err); | |
2078 | if (ret < 0) { | |
2079 | error_reportf_err(local_err, "%s: error while converting %s: ", | |
2080 | out_filename, out_fmt); | |
2081 | goto out; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; | |
2086 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2087 | if (ret < 0) { | |
2088 | error_report("Invalid cache option: %s", cache); | |
2089 | goto out; | |
2090 | } | |
2091 | ||
2092 | /* XXX we should allow --image-opts to trigger use of | |
2093 | * img_open() here, but then we have trouble with | |
2094 | * the bdrv_create() call which takes different params. | |
2095 | * Not critical right now, so fix can wait... | |
2096 | */ | |
2097 | out_blk = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); | |
2098 | if (!out_blk) { | |
2099 | ret = -1; | |
2100 | goto out; | |
2101 | } | |
2102 | out_bs = blk_bs(out_blk); | |
2103 | ||
2104 | /* increase bufsectors from the default 4096 (2M) if opt_transfer | |
2105 | * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) | |
2106 | * as maximum. */ | |
2107 | bufsectors = MIN(32768, | |
2108 | MAX(bufsectors, | |
2109 | MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, | |
2110 | out_bs->bl.pdiscard_alignment >> | |
2111 | BDRV_SECTOR_BITS))); | |
2112 | ||
2113 | if (skip_create) { | |
2114 | int64_t output_sectors = blk_nb_sectors(out_blk); | |
2115 | if (output_sectors < 0) { | |
2116 | error_report("unable to get output image length: %s", | |
2117 | strerror(-output_sectors)); | |
2118 | ret = -1; | |
2119 | goto out; | |
2120 | } else if (output_sectors < total_sectors) { | |
2121 | error_report("output file is smaller than input file"); | |
2122 | ret = -1; | |
2123 | goto out; | |
2124 | } | |
2125 | } | |
2126 | ||
2127 | cluster_sectors = 0; | |
2128 | ret = bdrv_get_info(out_bs, &bdi); | |
2129 | if (ret < 0) { | |
2130 | if (compress) { | |
2131 | error_report("could not get block driver info"); | |
2132 | goto out; | |
2133 | } | |
2134 | } else { | |
2135 | compress = compress || bdi.needs_compressed_writes; | |
2136 | cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; | |
2137 | } | |
2138 | ||
2139 | state = (ImgConvertState) { | |
2140 | .src = blk, | |
2141 | .src_sectors = bs_sectors, | |
2142 | .src_num = bs_n, | |
2143 | .total_sectors = total_sectors, | |
2144 | .target = out_blk, | |
2145 | .compressed = compress, | |
2146 | .target_has_backing = (bool) out_baseimg, | |
2147 | .min_sparse = min_sparse, | |
2148 | .cluster_sectors = cluster_sectors, | |
2149 | .buf_sectors = bufsectors, | |
2150 | }; | |
2151 | ret = convert_do_copy(&state); | |
2152 | ||
2153 | out: | |
2154 | if (!ret) { | |
2155 | qemu_progress_print(100, 0); | |
2156 | } | |
2157 | qemu_progress_end(); | |
2158 | qemu_opts_del(opts); | |
2159 | qemu_opts_free(create_opts); | |
2160 | qemu_opts_del(sn_opts); | |
2161 | blk_unref(out_blk); | |
2162 | g_free(bs); | |
2163 | if (blk) { | |
2164 | for (bs_i = 0; bs_i < bs_n; bs_i++) { | |
2165 | blk_unref(blk[bs_i]); | |
2166 | } | |
2167 | g_free(blk); | |
2168 | } | |
2169 | g_free(bs_sectors); | |
2170 | fail_getopt: | |
2171 | g_free(options); | |
2172 | ||
2173 | if (ret) { | |
2174 | return 1; | |
2175 | } | |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | ||
2180 | static void dump_snapshots(BlockDriverState *bs) | |
2181 | { | |
2182 | QEMUSnapshotInfo *sn_tab, *sn; | |
2183 | int nb_sns, i; | |
2184 | ||
2185 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); | |
2186 | if (nb_sns <= 0) | |
2187 | return; | |
2188 | printf("Snapshot list:\n"); | |
2189 | bdrv_snapshot_dump(fprintf, stdout, NULL); | |
2190 | printf("\n"); | |
2191 | for(i = 0; i < nb_sns; i++) { | |
2192 | sn = &sn_tab[i]; | |
2193 | bdrv_snapshot_dump(fprintf, stdout, sn); | |
2194 | printf("\n"); | |
2195 | } | |
2196 | g_free(sn_tab); | |
2197 | } | |
2198 | ||
2199 | static void dump_json_image_info_list(ImageInfoList *list) | |
2200 | { | |
2201 | QString *str; | |
2202 | QObject *obj; | |
2203 | Visitor *v = qobject_output_visitor_new(&obj); | |
2204 | ||
2205 | visit_type_ImageInfoList(v, NULL, &list, &error_abort); | |
2206 | visit_complete(v, &obj); | |
2207 | str = qobject_to_json_pretty(obj); | |
2208 | assert(str != NULL); | |
2209 | printf("%s\n", qstring_get_str(str)); | |
2210 | qobject_decref(obj); | |
2211 | visit_free(v); | |
2212 | QDECREF(str); | |
2213 | } | |
2214 | ||
2215 | static void dump_json_image_info(ImageInfo *info) | |
2216 | { | |
2217 | QString *str; | |
2218 | QObject *obj; | |
2219 | Visitor *v = qobject_output_visitor_new(&obj); | |
2220 | ||
2221 | visit_type_ImageInfo(v, NULL, &info, &error_abort); | |
2222 | visit_complete(v, &obj); | |
2223 | str = qobject_to_json_pretty(obj); | |
2224 | assert(str != NULL); | |
2225 | printf("%s\n", qstring_get_str(str)); | |
2226 | qobject_decref(obj); | |
2227 | visit_free(v); | |
2228 | QDECREF(str); | |
2229 | } | |
2230 | ||
2231 | static void dump_human_image_info_list(ImageInfoList *list) | |
2232 | { | |
2233 | ImageInfoList *elem; | |
2234 | bool delim = false; | |
2235 | ||
2236 | for (elem = list; elem; elem = elem->next) { | |
2237 | if (delim) { | |
2238 | printf("\n"); | |
2239 | } | |
2240 | delim = true; | |
2241 | ||
2242 | bdrv_image_info_dump(fprintf, stdout, elem->value); | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | static gboolean str_equal_func(gconstpointer a, gconstpointer b) | |
2247 | { | |
2248 | return strcmp(a, b) == 0; | |
2249 | } | |
2250 | ||
2251 | /** | |
2252 | * Open an image file chain and return an ImageInfoList | |
2253 | * | |
2254 | * @filename: topmost image filename | |
2255 | * @fmt: topmost image format (may be NULL to autodetect) | |
2256 | * @chain: true - enumerate entire backing file chain | |
2257 | * false - only topmost image file | |
2258 | * | |
2259 | * Returns a list of ImageInfo objects or NULL if there was an error opening an | |
2260 | * image file. If there was an error a message will have been printed to | |
2261 | * stderr. | |
2262 | */ | |
2263 | static ImageInfoList *collect_image_info_list(bool image_opts, | |
2264 | const char *filename, | |
2265 | const char *fmt, | |
2266 | bool chain) | |
2267 | { | |
2268 | ImageInfoList *head = NULL; | |
2269 | ImageInfoList **last = &head; | |
2270 | GHashTable *filenames; | |
2271 | Error *err = NULL; | |
2272 | ||
2273 | filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); | |
2274 | ||
2275 | while (filename) { | |
2276 | BlockBackend *blk; | |
2277 | BlockDriverState *bs; | |
2278 | ImageInfo *info; | |
2279 | ImageInfoList *elem; | |
2280 | ||
2281 | if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { | |
2282 | error_report("Backing file '%s' creates an infinite loop.", | |
2283 | filename); | |
2284 | goto err; | |
2285 | } | |
2286 | g_hash_table_insert(filenames, (gpointer)filename, NULL); | |
2287 | ||
2288 | blk = img_open(image_opts, filename, fmt, | |
2289 | BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); | |
2290 | if (!blk) { | |
2291 | goto err; | |
2292 | } | |
2293 | bs = blk_bs(blk); | |
2294 | ||
2295 | bdrv_query_image_info(bs, &info, &err); | |
2296 | if (err) { | |
2297 | error_report_err(err); | |
2298 | blk_unref(blk); | |
2299 | goto err; | |
2300 | } | |
2301 | ||
2302 | elem = g_new0(ImageInfoList, 1); | |
2303 | elem->value = info; | |
2304 | *last = elem; | |
2305 | last = &elem->next; | |
2306 | ||
2307 | blk_unref(blk); | |
2308 | ||
2309 | filename = fmt = NULL; | |
2310 | if (chain) { | |
2311 | if (info->has_full_backing_filename) { | |
2312 | filename = info->full_backing_filename; | |
2313 | } else if (info->has_backing_filename) { | |
2314 | error_report("Could not determine absolute backing filename," | |
2315 | " but backing filename '%s' present", | |
2316 | info->backing_filename); | |
2317 | goto err; | |
2318 | } | |
2319 | if (info->has_backing_filename_format) { | |
2320 | fmt = info->backing_filename_format; | |
2321 | } | |
2322 | } | |
2323 | } | |
2324 | g_hash_table_destroy(filenames); | |
2325 | return head; | |
2326 | ||
2327 | err: | |
2328 | qapi_free_ImageInfoList(head); | |
2329 | g_hash_table_destroy(filenames); | |
2330 | return NULL; | |
2331 | } | |
2332 | ||
2333 | static int img_info(int argc, char **argv) | |
2334 | { | |
2335 | int c; | |
2336 | OutputFormat output_format = OFORMAT_HUMAN; | |
2337 | bool chain = false; | |
2338 | const char *filename, *fmt, *output; | |
2339 | ImageInfoList *list; | |
2340 | bool image_opts = false; | |
2341 | ||
2342 | fmt = NULL; | |
2343 | output = NULL; | |
2344 | for(;;) { | |
2345 | int option_index = 0; | |
2346 | static const struct option long_options[] = { | |
2347 | {"help", no_argument, 0, 'h'}, | |
2348 | {"format", required_argument, 0, 'f'}, | |
2349 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2350 | {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, | |
2351 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2352 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2353 | {0, 0, 0, 0} | |
2354 | }; | |
2355 | c = getopt_long(argc, argv, "f:h", | |
2356 | long_options, &option_index); | |
2357 | if (c == -1) { | |
2358 | break; | |
2359 | } | |
2360 | switch(c) { | |
2361 | case '?': | |
2362 | case 'h': | |
2363 | help(); | |
2364 | break; | |
2365 | case 'f': | |
2366 | fmt = optarg; | |
2367 | break; | |
2368 | case OPTION_OUTPUT: | |
2369 | output = optarg; | |
2370 | break; | |
2371 | case OPTION_BACKING_CHAIN: | |
2372 | chain = true; | |
2373 | break; | |
2374 | case OPTION_OBJECT: { | |
2375 | QemuOpts *opts; | |
2376 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2377 | optarg, true); | |
2378 | if (!opts) { | |
2379 | return 1; | |
2380 | } | |
2381 | } break; | |
2382 | case OPTION_IMAGE_OPTS: | |
2383 | image_opts = true; | |
2384 | break; | |
2385 | } | |
2386 | } | |
2387 | if (optind != argc - 1) { | |
2388 | error_exit("Expecting one image file name"); | |
2389 | } | |
2390 | filename = argv[optind++]; | |
2391 | ||
2392 | if (output && !strcmp(output, "json")) { | |
2393 | output_format = OFORMAT_JSON; | |
2394 | } else if (output && !strcmp(output, "human")) { | |
2395 | output_format = OFORMAT_HUMAN; | |
2396 | } else if (output) { | |
2397 | error_report("--output must be used with human or json as argument."); | |
2398 | return 1; | |
2399 | } | |
2400 | ||
2401 | if (qemu_opts_foreach(&qemu_object_opts, | |
2402 | user_creatable_add_opts_foreach, | |
2403 | NULL, NULL)) { | |
2404 | return 1; | |
2405 | } | |
2406 | ||
2407 | list = collect_image_info_list(image_opts, filename, fmt, chain); | |
2408 | if (!list) { | |
2409 | return 1; | |
2410 | } | |
2411 | ||
2412 | switch (output_format) { | |
2413 | case OFORMAT_HUMAN: | |
2414 | dump_human_image_info_list(list); | |
2415 | break; | |
2416 | case OFORMAT_JSON: | |
2417 | if (chain) { | |
2418 | dump_json_image_info_list(list); | |
2419 | } else { | |
2420 | dump_json_image_info(list->value); | |
2421 | } | |
2422 | break; | |
2423 | } | |
2424 | ||
2425 | qapi_free_ImageInfoList(list); | |
2426 | return 0; | |
2427 | } | |
2428 | ||
2429 | static void dump_map_entry(OutputFormat output_format, MapEntry *e, | |
2430 | MapEntry *next) | |
2431 | { | |
2432 | switch (output_format) { | |
2433 | case OFORMAT_HUMAN: | |
2434 | if (e->data && !e->has_offset) { | |
2435 | error_report("File contains external, encrypted or compressed clusters."); | |
2436 | exit(1); | |
2437 | } | |
2438 | if (e->data && !e->zero) { | |
2439 | printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", | |
2440 | e->start, e->length, | |
2441 | e->has_offset ? e->offset : 0, | |
2442 | e->has_filename ? e->filename : ""); | |
2443 | } | |
2444 | /* This format ignores the distinction between 0, ZERO and ZERO|DATA. | |
2445 | * Modify the flags here to allow more coalescing. | |
2446 | */ | |
2447 | if (next && (!next->data || next->zero)) { | |
2448 | next->data = false; | |
2449 | next->zero = true; | |
2450 | } | |
2451 | break; | |
2452 | case OFORMAT_JSON: | |
2453 | printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," | |
2454 | " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", | |
2455 | (e->start == 0 ? "[" : ",\n"), | |
2456 | e->start, e->length, e->depth, | |
2457 | e->zero ? "true" : "false", | |
2458 | e->data ? "true" : "false"); | |
2459 | if (e->has_offset) { | |
2460 | printf(", \"offset\": %"PRId64"", e->offset); | |
2461 | } | |
2462 | putchar('}'); | |
2463 | ||
2464 | if (!next) { | |
2465 | printf("]\n"); | |
2466 | } | |
2467 | break; | |
2468 | } | |
2469 | } | |
2470 | ||
2471 | static int get_block_status(BlockDriverState *bs, int64_t sector_num, | |
2472 | int nb_sectors, MapEntry *e) | |
2473 | { | |
2474 | int64_t ret; | |
2475 | int depth; | |
2476 | BlockDriverState *file; | |
2477 | bool has_offset; | |
2478 | ||
2479 | /* As an optimization, we could cache the current range of unallocated | |
2480 | * clusters in each file of the chain, and avoid querying the same | |
2481 | * range repeatedly. | |
2482 | */ | |
2483 | ||
2484 | depth = 0; | |
2485 | for (;;) { | |
2486 | ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, | |
2487 | &file); | |
2488 | if (ret < 0) { | |
2489 | return ret; | |
2490 | } | |
2491 | assert(nb_sectors); | |
2492 | if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { | |
2493 | break; | |
2494 | } | |
2495 | bs = backing_bs(bs); | |
2496 | if (bs == NULL) { | |
2497 | ret = 0; | |
2498 | break; | |
2499 | } | |
2500 | ||
2501 | depth++; | |
2502 | } | |
2503 | ||
2504 | has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); | |
2505 | ||
2506 | *e = (MapEntry) { | |
2507 | .start = sector_num * BDRV_SECTOR_SIZE, | |
2508 | .length = nb_sectors * BDRV_SECTOR_SIZE, | |
2509 | .data = !!(ret & BDRV_BLOCK_DATA), | |
2510 | .zero = !!(ret & BDRV_BLOCK_ZERO), | |
2511 | .offset = ret & BDRV_BLOCK_OFFSET_MASK, | |
2512 | .has_offset = has_offset, | |
2513 | .depth = depth, | |
2514 | .has_filename = file && has_offset, | |
2515 | .filename = file && has_offset ? file->filename : NULL, | |
2516 | }; | |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) | |
2522 | { | |
2523 | if (curr->length == 0) { | |
2524 | return false; | |
2525 | } | |
2526 | if (curr->zero != next->zero || | |
2527 | curr->data != next->data || | |
2528 | curr->depth != next->depth || | |
2529 | curr->has_filename != next->has_filename || | |
2530 | curr->has_offset != next->has_offset) { | |
2531 | return false; | |
2532 | } | |
2533 | if (curr->has_filename && strcmp(curr->filename, next->filename)) { | |
2534 | return false; | |
2535 | } | |
2536 | if (curr->has_offset && curr->offset + curr->length != next->offset) { | |
2537 | return false; | |
2538 | } | |
2539 | return true; | |
2540 | } | |
2541 | ||
2542 | static int img_map(int argc, char **argv) | |
2543 | { | |
2544 | int c; | |
2545 | OutputFormat output_format = OFORMAT_HUMAN; | |
2546 | BlockBackend *blk; | |
2547 | BlockDriverState *bs; | |
2548 | const char *filename, *fmt, *output; | |
2549 | int64_t length; | |
2550 | MapEntry curr = { .length = 0 }, next; | |
2551 | int ret = 0; | |
2552 | bool image_opts = false; | |
2553 | ||
2554 | fmt = NULL; | |
2555 | output = NULL; | |
2556 | for (;;) { | |
2557 | int option_index = 0; | |
2558 | static const struct option long_options[] = { | |
2559 | {"help", no_argument, 0, 'h'}, | |
2560 | {"format", required_argument, 0, 'f'}, | |
2561 | {"output", required_argument, 0, OPTION_OUTPUT}, | |
2562 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2563 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2564 | {0, 0, 0, 0} | |
2565 | }; | |
2566 | c = getopt_long(argc, argv, "f:h", | |
2567 | long_options, &option_index); | |
2568 | if (c == -1) { | |
2569 | break; | |
2570 | } | |
2571 | switch (c) { | |
2572 | case '?': | |
2573 | case 'h': | |
2574 | help(); | |
2575 | break; | |
2576 | case 'f': | |
2577 | fmt = optarg; | |
2578 | break; | |
2579 | case OPTION_OUTPUT: | |
2580 | output = optarg; | |
2581 | break; | |
2582 | case OPTION_OBJECT: { | |
2583 | QemuOpts *opts; | |
2584 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2585 | optarg, true); | |
2586 | if (!opts) { | |
2587 | return 1; | |
2588 | } | |
2589 | } break; | |
2590 | case OPTION_IMAGE_OPTS: | |
2591 | image_opts = true; | |
2592 | break; | |
2593 | } | |
2594 | } | |
2595 | if (optind != argc - 1) { | |
2596 | error_exit("Expecting one image file name"); | |
2597 | } | |
2598 | filename = argv[optind]; | |
2599 | ||
2600 | if (output && !strcmp(output, "json")) { | |
2601 | output_format = OFORMAT_JSON; | |
2602 | } else if (output && !strcmp(output, "human")) { | |
2603 | output_format = OFORMAT_HUMAN; | |
2604 | } else if (output) { | |
2605 | error_report("--output must be used with human or json as argument."); | |
2606 | return 1; | |
2607 | } | |
2608 | ||
2609 | if (qemu_opts_foreach(&qemu_object_opts, | |
2610 | user_creatable_add_opts_foreach, | |
2611 | NULL, NULL)) { | |
2612 | return 1; | |
2613 | } | |
2614 | ||
2615 | blk = img_open(image_opts, filename, fmt, 0, false, false); | |
2616 | if (!blk) { | |
2617 | return 1; | |
2618 | } | |
2619 | bs = blk_bs(blk); | |
2620 | ||
2621 | if (output_format == OFORMAT_HUMAN) { | |
2622 | printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); | |
2623 | } | |
2624 | ||
2625 | length = blk_getlength(blk); | |
2626 | while (curr.start + curr.length < length) { | |
2627 | int64_t nsectors_left; | |
2628 | int64_t sector_num; | |
2629 | int n; | |
2630 | ||
2631 | sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; | |
2632 | ||
2633 | /* Probe up to 1 GiB at a time. */ | |
2634 | nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; | |
2635 | n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); | |
2636 | ret = get_block_status(bs, sector_num, n, &next); | |
2637 | ||
2638 | if (ret < 0) { | |
2639 | error_report("Could not read file metadata: %s", strerror(-ret)); | |
2640 | goto out; | |
2641 | } | |
2642 | ||
2643 | if (entry_mergeable(&curr, &next)) { | |
2644 | curr.length += next.length; | |
2645 | continue; | |
2646 | } | |
2647 | ||
2648 | if (curr.length > 0) { | |
2649 | dump_map_entry(output_format, &curr, &next); | |
2650 | } | |
2651 | curr = next; | |
2652 | } | |
2653 | ||
2654 | dump_map_entry(output_format, &curr, NULL); | |
2655 | ||
2656 | out: | |
2657 | blk_unref(blk); | |
2658 | return ret < 0; | |
2659 | } | |
2660 | ||
2661 | #define SNAPSHOT_LIST 1 | |
2662 | #define SNAPSHOT_CREATE 2 | |
2663 | #define SNAPSHOT_APPLY 3 | |
2664 | #define SNAPSHOT_DELETE 4 | |
2665 | ||
2666 | static int img_snapshot(int argc, char **argv) | |
2667 | { | |
2668 | BlockBackend *blk; | |
2669 | BlockDriverState *bs; | |
2670 | QEMUSnapshotInfo sn; | |
2671 | char *filename, *snapshot_name = NULL; | |
2672 | int c, ret = 0, bdrv_oflags; | |
2673 | int action = 0; | |
2674 | qemu_timeval tv; | |
2675 | bool quiet = false; | |
2676 | Error *err = NULL; | |
2677 | bool image_opts = false; | |
2678 | ||
2679 | bdrv_oflags = BDRV_O_RDWR; | |
2680 | /* Parse commandline parameters */ | |
2681 | for(;;) { | |
2682 | static const struct option long_options[] = { | |
2683 | {"help", no_argument, 0, 'h'}, | |
2684 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2685 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2686 | {0, 0, 0, 0} | |
2687 | }; | |
2688 | c = getopt_long(argc, argv, "la:c:d:hq", | |
2689 | long_options, NULL); | |
2690 | if (c == -1) { | |
2691 | break; | |
2692 | } | |
2693 | switch(c) { | |
2694 | case '?': | |
2695 | case 'h': | |
2696 | help(); | |
2697 | return 0; | |
2698 | case 'l': | |
2699 | if (action) { | |
2700 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2701 | return 0; | |
2702 | } | |
2703 | action = SNAPSHOT_LIST; | |
2704 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ | |
2705 | break; | |
2706 | case 'a': | |
2707 | if (action) { | |
2708 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2709 | return 0; | |
2710 | } | |
2711 | action = SNAPSHOT_APPLY; | |
2712 | snapshot_name = optarg; | |
2713 | break; | |
2714 | case 'c': | |
2715 | if (action) { | |
2716 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2717 | return 0; | |
2718 | } | |
2719 | action = SNAPSHOT_CREATE; | |
2720 | snapshot_name = optarg; | |
2721 | break; | |
2722 | case 'd': | |
2723 | if (action) { | |
2724 | error_exit("Cannot mix '-l', '-a', '-c', '-d'"); | |
2725 | return 0; | |
2726 | } | |
2727 | action = SNAPSHOT_DELETE; | |
2728 | snapshot_name = optarg; | |
2729 | break; | |
2730 | case 'q': | |
2731 | quiet = true; | |
2732 | break; | |
2733 | case OPTION_OBJECT: { | |
2734 | QemuOpts *opts; | |
2735 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2736 | optarg, true); | |
2737 | if (!opts) { | |
2738 | return 1; | |
2739 | } | |
2740 | } break; | |
2741 | case OPTION_IMAGE_OPTS: | |
2742 | image_opts = true; | |
2743 | break; | |
2744 | } | |
2745 | } | |
2746 | ||
2747 | if (optind != argc - 1) { | |
2748 | error_exit("Expecting one image file name"); | |
2749 | } | |
2750 | filename = argv[optind++]; | |
2751 | ||
2752 | if (qemu_opts_foreach(&qemu_object_opts, | |
2753 | user_creatable_add_opts_foreach, | |
2754 | NULL, NULL)) { | |
2755 | return 1; | |
2756 | } | |
2757 | ||
2758 | /* Open the image */ | |
2759 | blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); | |
2760 | if (!blk) { | |
2761 | return 1; | |
2762 | } | |
2763 | bs = blk_bs(blk); | |
2764 | ||
2765 | /* Perform the requested action */ | |
2766 | switch(action) { | |
2767 | case SNAPSHOT_LIST: | |
2768 | dump_snapshots(bs); | |
2769 | break; | |
2770 | ||
2771 | case SNAPSHOT_CREATE: | |
2772 | memset(&sn, 0, sizeof(sn)); | |
2773 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); | |
2774 | ||
2775 | qemu_gettimeofday(&tv); | |
2776 | sn.date_sec = tv.tv_sec; | |
2777 | sn.date_nsec = tv.tv_usec * 1000; | |
2778 | ||
2779 | ret = bdrv_snapshot_create(bs, &sn); | |
2780 | if (ret) { | |
2781 | error_report("Could not create snapshot '%s': %d (%s)", | |
2782 | snapshot_name, ret, strerror(-ret)); | |
2783 | } | |
2784 | break; | |
2785 | ||
2786 | case SNAPSHOT_APPLY: | |
2787 | ret = bdrv_snapshot_goto(bs, snapshot_name); | |
2788 | if (ret) { | |
2789 | error_report("Could not apply snapshot '%s': %d (%s)", | |
2790 | snapshot_name, ret, strerror(-ret)); | |
2791 | } | |
2792 | break; | |
2793 | ||
2794 | case SNAPSHOT_DELETE: | |
2795 | bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); | |
2796 | if (err) { | |
2797 | error_reportf_err(err, "Could not delete snapshot '%s': ", | |
2798 | snapshot_name); | |
2799 | ret = 1; | |
2800 | } | |
2801 | break; | |
2802 | } | |
2803 | ||
2804 | /* Cleanup */ | |
2805 | blk_unref(blk); | |
2806 | if (ret) { | |
2807 | return 1; | |
2808 | } | |
2809 | return 0; | |
2810 | } | |
2811 | ||
2812 | static int img_rebase(int argc, char **argv) | |
2813 | { | |
2814 | BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; | |
2815 | uint8_t *buf_old = NULL; | |
2816 | uint8_t *buf_new = NULL; | |
2817 | BlockDriverState *bs = NULL; | |
2818 | char *filename; | |
2819 | const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; | |
2820 | int c, flags, src_flags, ret; | |
2821 | bool writethrough, src_writethrough; | |
2822 | int unsafe = 0; | |
2823 | int progress = 0; | |
2824 | bool quiet = false; | |
2825 | Error *local_err = NULL; | |
2826 | bool image_opts = false; | |
2827 | ||
2828 | /* Parse commandline parameters */ | |
2829 | fmt = NULL; | |
2830 | cache = BDRV_DEFAULT_CACHE; | |
2831 | src_cache = BDRV_DEFAULT_CACHE; | |
2832 | out_baseimg = NULL; | |
2833 | out_basefmt = NULL; | |
2834 | for(;;) { | |
2835 | static const struct option long_options[] = { | |
2836 | {"help", no_argument, 0, 'h'}, | |
2837 | {"object", required_argument, 0, OPTION_OBJECT}, | |
2838 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
2839 | {0, 0, 0, 0} | |
2840 | }; | |
2841 | c = getopt_long(argc, argv, "hf:F:b:upt:T:q", | |
2842 | long_options, NULL); | |
2843 | if (c == -1) { | |
2844 | break; | |
2845 | } | |
2846 | switch(c) { | |
2847 | case '?': | |
2848 | case 'h': | |
2849 | help(); | |
2850 | return 0; | |
2851 | case 'f': | |
2852 | fmt = optarg; | |
2853 | break; | |
2854 | case 'F': | |
2855 | out_basefmt = optarg; | |
2856 | break; | |
2857 | case 'b': | |
2858 | out_baseimg = optarg; | |
2859 | break; | |
2860 | case 'u': | |
2861 | unsafe = 1; | |
2862 | break; | |
2863 | case 'p': | |
2864 | progress = 1; | |
2865 | break; | |
2866 | case 't': | |
2867 | cache = optarg; | |
2868 | break; | |
2869 | case 'T': | |
2870 | src_cache = optarg; | |
2871 | break; | |
2872 | case 'q': | |
2873 | quiet = true; | |
2874 | break; | |
2875 | case OPTION_OBJECT: { | |
2876 | QemuOpts *opts; | |
2877 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
2878 | optarg, true); | |
2879 | if (!opts) { | |
2880 | return 1; | |
2881 | } | |
2882 | } break; | |
2883 | case OPTION_IMAGE_OPTS: | |
2884 | image_opts = true; | |
2885 | break; | |
2886 | } | |
2887 | } | |
2888 | ||
2889 | if (quiet) { | |
2890 | progress = 0; | |
2891 | } | |
2892 | ||
2893 | if (optind != argc - 1) { | |
2894 | error_exit("Expecting one image file name"); | |
2895 | } | |
2896 | if (!unsafe && !out_baseimg) { | |
2897 | error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); | |
2898 | } | |
2899 | filename = argv[optind++]; | |
2900 | ||
2901 | if (qemu_opts_foreach(&qemu_object_opts, | |
2902 | user_creatable_add_opts_foreach, | |
2903 | NULL, NULL)) { | |
2904 | return 1; | |
2905 | } | |
2906 | ||
2907 | qemu_progress_init(progress, 2.0); | |
2908 | qemu_progress_print(0, 100); | |
2909 | ||
2910 | flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); | |
2911 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
2912 | if (ret < 0) { | |
2913 | error_report("Invalid cache option: %s", cache); | |
2914 | goto out; | |
2915 | } | |
2916 | ||
2917 | src_flags = 0; | |
2918 | ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); | |
2919 | if (ret < 0) { | |
2920 | error_report("Invalid source cache option: %s", src_cache); | |
2921 | goto out; | |
2922 | } | |
2923 | ||
2924 | /* The source files are opened read-only, don't care about WCE */ | |
2925 | assert((src_flags & BDRV_O_RDWR) == 0); | |
2926 | (void) src_writethrough; | |
2927 | ||
2928 | /* | |
2929 | * Open the images. | |
2930 | * | |
2931 | * Ignore the old backing file for unsafe rebase in case we want to correct | |
2932 | * the reference to a renamed or moved backing file. | |
2933 | */ | |
2934 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
2935 | if (!blk) { | |
2936 | ret = -1; | |
2937 | goto out; | |
2938 | } | |
2939 | bs = blk_bs(blk); | |
2940 | ||
2941 | if (out_basefmt != NULL) { | |
2942 | if (bdrv_find_format(out_basefmt) == NULL) { | |
2943 | error_report("Invalid format name: '%s'", out_basefmt); | |
2944 | ret = -1; | |
2945 | goto out; | |
2946 | } | |
2947 | } | |
2948 | ||
2949 | /* For safe rebasing we need to compare old and new backing file */ | |
2950 | if (!unsafe) { | |
2951 | char backing_name[PATH_MAX]; | |
2952 | QDict *options = NULL; | |
2953 | ||
2954 | if (bs->backing_format[0] != '\0') { | |
2955 | options = qdict_new(); | |
2956 | qdict_put(options, "driver", qstring_from_str(bs->backing_format)); | |
2957 | } | |
2958 | ||
2959 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
2960 | blk_old_backing = blk_new_open(backing_name, NULL, | |
2961 | options, src_flags, &local_err); | |
2962 | if (!blk_old_backing) { | |
2963 | error_reportf_err(local_err, | |
2964 | "Could not open old backing file '%s': ", | |
2965 | backing_name); | |
2966 | ret = -1; | |
2967 | goto out; | |
2968 | } | |
2969 | ||
2970 | if (out_baseimg[0]) { | |
2971 | if (out_basefmt) { | |
2972 | options = qdict_new(); | |
2973 | qdict_put(options, "driver", qstring_from_str(out_basefmt)); | |
2974 | } else { | |
2975 | options = NULL; | |
2976 | } | |
2977 | ||
2978 | blk_new_backing = blk_new_open(out_baseimg, NULL, | |
2979 | options, src_flags, &local_err); | |
2980 | if (!blk_new_backing) { | |
2981 | error_reportf_err(local_err, | |
2982 | "Could not open new backing file '%s': ", | |
2983 | out_baseimg); | |
2984 | ret = -1; | |
2985 | goto out; | |
2986 | } | |
2987 | } | |
2988 | } | |
2989 | ||
2990 | /* | |
2991 | * Check each unallocated cluster in the COW file. If it is unallocated, | |
2992 | * accesses go to the backing file. We must therefore compare this cluster | |
2993 | * in the old and new backing file, and if they differ we need to copy it | |
2994 | * from the old backing file into the COW file. | |
2995 | * | |
2996 | * If qemu-img crashes during this step, no harm is done. The content of | |
2997 | * the image is the same as the original one at any time. | |
2998 | */ | |
2999 | if (!unsafe) { | |
3000 | int64_t num_sectors; | |
3001 | int64_t old_backing_num_sectors; | |
3002 | int64_t new_backing_num_sectors = 0; | |
3003 | uint64_t sector; | |
3004 | int n; | |
3005 | float local_progress = 0; | |
3006 | ||
3007 | buf_old = blk_blockalign(blk, IO_BUF_SIZE); | |
3008 | buf_new = blk_blockalign(blk, IO_BUF_SIZE); | |
3009 | ||
3010 | num_sectors = blk_nb_sectors(blk); | |
3011 | if (num_sectors < 0) { | |
3012 | error_report("Could not get size of '%s': %s", | |
3013 | filename, strerror(-num_sectors)); | |
3014 | ret = -1; | |
3015 | goto out; | |
3016 | } | |
3017 | old_backing_num_sectors = blk_nb_sectors(blk_old_backing); | |
3018 | if (old_backing_num_sectors < 0) { | |
3019 | char backing_name[PATH_MAX]; | |
3020 | ||
3021 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); | |
3022 | error_report("Could not get size of '%s': %s", | |
3023 | backing_name, strerror(-old_backing_num_sectors)); | |
3024 | ret = -1; | |
3025 | goto out; | |
3026 | } | |
3027 | if (blk_new_backing) { | |
3028 | new_backing_num_sectors = blk_nb_sectors(blk_new_backing); | |
3029 | if (new_backing_num_sectors < 0) { | |
3030 | error_report("Could not get size of '%s': %s", | |
3031 | out_baseimg, strerror(-new_backing_num_sectors)); | |
3032 | ret = -1; | |
3033 | goto out; | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | if (num_sectors != 0) { | |
3038 | local_progress = (float)100 / | |
3039 | (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); | |
3040 | } | |
3041 | ||
3042 | for (sector = 0; sector < num_sectors; sector += n) { | |
3043 | ||
3044 | /* How many sectors can we handle with the next read? */ | |
3045 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { | |
3046 | n = (IO_BUF_SIZE / 512); | |
3047 | } else { | |
3048 | n = num_sectors - sector; | |
3049 | } | |
3050 | ||
3051 | /* If the cluster is allocated, we don't need to take action */ | |
3052 | ret = bdrv_is_allocated(bs, sector, n, &n); | |
3053 | if (ret < 0) { | |
3054 | error_report("error while reading image metadata: %s", | |
3055 | strerror(-ret)); | |
3056 | goto out; | |
3057 | } | |
3058 | if (ret) { | |
3059 | continue; | |
3060 | } | |
3061 | ||
3062 | /* | |
3063 | * Read old and new backing file and take into consideration that | |
3064 | * backing files may be smaller than the COW image. | |
3065 | */ | |
3066 | if (sector >= old_backing_num_sectors) { | |
3067 | memset(buf_old, 0, n * BDRV_SECTOR_SIZE); | |
3068 | } else { | |
3069 | if (sector + n > old_backing_num_sectors) { | |
3070 | n = old_backing_num_sectors - sector; | |
3071 | } | |
3072 | ||
3073 | ret = blk_pread(blk_old_backing, sector << BDRV_SECTOR_BITS, | |
3074 | buf_old, n << BDRV_SECTOR_BITS); | |
3075 | if (ret < 0) { | |
3076 | error_report("error while reading from old backing file"); | |
3077 | goto out; | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | if (sector >= new_backing_num_sectors || !blk_new_backing) { | |
3082 | memset(buf_new, 0, n * BDRV_SECTOR_SIZE); | |
3083 | } else { | |
3084 | if (sector + n > new_backing_num_sectors) { | |
3085 | n = new_backing_num_sectors - sector; | |
3086 | } | |
3087 | ||
3088 | ret = blk_pread(blk_new_backing, sector << BDRV_SECTOR_BITS, | |
3089 | buf_new, n << BDRV_SECTOR_BITS); | |
3090 | if (ret < 0) { | |
3091 | error_report("error while reading from new backing file"); | |
3092 | goto out; | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | /* If they differ, we need to write to the COW file */ | |
3097 | uint64_t written = 0; | |
3098 | ||
3099 | while (written < n) { | |
3100 | int pnum; | |
3101 | ||
3102 | if (compare_sectors(buf_old + written * 512, | |
3103 | buf_new + written * 512, n - written, &pnum)) | |
3104 | { | |
3105 | ret = blk_pwrite(blk, | |
3106 | (sector + written) << BDRV_SECTOR_BITS, | |
3107 | buf_old + written * 512, | |
3108 | pnum << BDRV_SECTOR_BITS, 0); | |
3109 | if (ret < 0) { | |
3110 | error_report("Error while writing to COW image: %s", | |
3111 | strerror(-ret)); | |
3112 | goto out; | |
3113 | } | |
3114 | } | |
3115 | ||
3116 | written += pnum; | |
3117 | } | |
3118 | qemu_progress_print(local_progress, 100); | |
3119 | } | |
3120 | } | |
3121 | ||
3122 | /* | |
3123 | * Change the backing file. All clusters that are different from the old | |
3124 | * backing file are overwritten in the COW file now, so the visible content | |
3125 | * doesn't change when we switch the backing file. | |
3126 | */ | |
3127 | if (out_baseimg && *out_baseimg) { | |
3128 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); | |
3129 | } else { | |
3130 | ret = bdrv_change_backing_file(bs, NULL, NULL); | |
3131 | } | |
3132 | ||
3133 | if (ret == -ENOSPC) { | |
3134 | error_report("Could not change the backing file to '%s': No " | |
3135 | "space left in the file header", out_baseimg); | |
3136 | } else if (ret < 0) { | |
3137 | error_report("Could not change the backing file to '%s': %s", | |
3138 | out_baseimg, strerror(-ret)); | |
3139 | } | |
3140 | ||
3141 | qemu_progress_print(100, 0); | |
3142 | /* | |
3143 | * TODO At this point it is possible to check if any clusters that are | |
3144 | * allocated in the COW file are the same in the backing file. If so, they | |
3145 | * could be dropped from the COW file. Don't do this before switching the | |
3146 | * backing file, in case of a crash this would lead to corruption. | |
3147 | */ | |
3148 | out: | |
3149 | qemu_progress_end(); | |
3150 | /* Cleanup */ | |
3151 | if (!unsafe) { | |
3152 | blk_unref(blk_old_backing); | |
3153 | blk_unref(blk_new_backing); | |
3154 | } | |
3155 | qemu_vfree(buf_old); | |
3156 | qemu_vfree(buf_new); | |
3157 | ||
3158 | blk_unref(blk); | |
3159 | if (ret) { | |
3160 | return 1; | |
3161 | } | |
3162 | return 0; | |
3163 | } | |
3164 | ||
3165 | static int img_resize(int argc, char **argv) | |
3166 | { | |
3167 | Error *err = NULL; | |
3168 | int c, ret, relative; | |
3169 | const char *filename, *fmt, *size; | |
3170 | int64_t n, total_size; | |
3171 | bool quiet = false; | |
3172 | BlockBackend *blk = NULL; | |
3173 | QemuOpts *param; | |
3174 | ||
3175 | static QemuOptsList resize_options = { | |
3176 | .name = "resize_options", | |
3177 | .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), | |
3178 | .desc = { | |
3179 | { | |
3180 | .name = BLOCK_OPT_SIZE, | |
3181 | .type = QEMU_OPT_SIZE, | |
3182 | .help = "Virtual disk size" | |
3183 | }, { | |
3184 | /* end of list */ | |
3185 | } | |
3186 | }, | |
3187 | }; | |
3188 | bool image_opts = false; | |
3189 | ||
3190 | /* Remove size from argv manually so that negative numbers are not treated | |
3191 | * as options by getopt. */ | |
3192 | if (argc < 3) { | |
3193 | error_exit("Not enough arguments"); | |
3194 | return 1; | |
3195 | } | |
3196 | ||
3197 | size = argv[--argc]; | |
3198 | ||
3199 | /* Parse getopt arguments */ | |
3200 | fmt = NULL; | |
3201 | for(;;) { | |
3202 | static const struct option long_options[] = { | |
3203 | {"help", no_argument, 0, 'h'}, | |
3204 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3205 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3206 | {0, 0, 0, 0} | |
3207 | }; | |
3208 | c = getopt_long(argc, argv, "f:hq", | |
3209 | long_options, NULL); | |
3210 | if (c == -1) { | |
3211 | break; | |
3212 | } | |
3213 | switch(c) { | |
3214 | case '?': | |
3215 | case 'h': | |
3216 | help(); | |
3217 | break; | |
3218 | case 'f': | |
3219 | fmt = optarg; | |
3220 | break; | |
3221 | case 'q': | |
3222 | quiet = true; | |
3223 | break; | |
3224 | case OPTION_OBJECT: { | |
3225 | QemuOpts *opts; | |
3226 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3227 | optarg, true); | |
3228 | if (!opts) { | |
3229 | return 1; | |
3230 | } | |
3231 | } break; | |
3232 | case OPTION_IMAGE_OPTS: | |
3233 | image_opts = true; | |
3234 | break; | |
3235 | } | |
3236 | } | |
3237 | if (optind != argc - 1) { | |
3238 | error_exit("Expecting one image file name"); | |
3239 | } | |
3240 | filename = argv[optind++]; | |
3241 | ||
3242 | if (qemu_opts_foreach(&qemu_object_opts, | |
3243 | user_creatable_add_opts_foreach, | |
3244 | NULL, NULL)) { | |
3245 | return 1; | |
3246 | } | |
3247 | ||
3248 | /* Choose grow, shrink, or absolute resize mode */ | |
3249 | switch (size[0]) { | |
3250 | case '+': | |
3251 | relative = 1; | |
3252 | size++; | |
3253 | break; | |
3254 | case '-': | |
3255 | relative = -1; | |
3256 | size++; | |
3257 | break; | |
3258 | default: | |
3259 | relative = 0; | |
3260 | break; | |
3261 | } | |
3262 | ||
3263 | /* Parse size */ | |
3264 | param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); | |
3265 | qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); | |
3266 | if (err) { | |
3267 | error_report_err(err); | |
3268 | ret = -1; | |
3269 | qemu_opts_del(param); | |
3270 | goto out; | |
3271 | } | |
3272 | n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); | |
3273 | qemu_opts_del(param); | |
3274 | ||
3275 | blk = img_open(image_opts, filename, fmt, | |
3276 | BDRV_O_RDWR, false, quiet); | |
3277 | if (!blk) { | |
3278 | ret = -1; | |
3279 | goto out; | |
3280 | } | |
3281 | ||
3282 | if (relative) { | |
3283 | total_size = blk_getlength(blk) + n * relative; | |
3284 | } else { | |
3285 | total_size = n; | |
3286 | } | |
3287 | if (total_size <= 0) { | |
3288 | error_report("New image size must be positive"); | |
3289 | ret = -1; | |
3290 | goto out; | |
3291 | } | |
3292 | ||
3293 | ret = blk_truncate(blk, total_size); | |
3294 | switch (ret) { | |
3295 | case 0: | |
3296 | qprintf(quiet, "Image resized.\n"); | |
3297 | break; | |
3298 | case -ENOTSUP: | |
3299 | error_report("This image does not support resize"); | |
3300 | break; | |
3301 | case -EACCES: | |
3302 | error_report("Image is read-only"); | |
3303 | break; | |
3304 | default: | |
3305 | error_report("Error resizing image: %s", strerror(-ret)); | |
3306 | break; | |
3307 | } | |
3308 | out: | |
3309 | blk_unref(blk); | |
3310 | if (ret) { | |
3311 | return 1; | |
3312 | } | |
3313 | return 0; | |
3314 | } | |
3315 | ||
3316 | static void amend_status_cb(BlockDriverState *bs, | |
3317 | int64_t offset, int64_t total_work_size, | |
3318 | void *opaque) | |
3319 | { | |
3320 | qemu_progress_print(100.f * offset / total_work_size, 0); | |
3321 | } | |
3322 | ||
3323 | static int img_amend(int argc, char **argv) | |
3324 | { | |
3325 | Error *err = NULL; | |
3326 | int c, ret = 0; | |
3327 | char *options = NULL; | |
3328 | QemuOptsList *create_opts = NULL; | |
3329 | QemuOpts *opts = NULL; | |
3330 | const char *fmt = NULL, *filename, *cache; | |
3331 | int flags; | |
3332 | bool writethrough; | |
3333 | bool quiet = false, progress = false; | |
3334 | BlockBackend *blk = NULL; | |
3335 | BlockDriverState *bs = NULL; | |
3336 | bool image_opts = false; | |
3337 | ||
3338 | cache = BDRV_DEFAULT_CACHE; | |
3339 | for (;;) { | |
3340 | static const struct option long_options[] = { | |
3341 | {"help", no_argument, 0, 'h'}, | |
3342 | {"object", required_argument, 0, OPTION_OBJECT}, | |
3343 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3344 | {0, 0, 0, 0} | |
3345 | }; | |
3346 | c = getopt_long(argc, argv, "ho:f:t:pq", | |
3347 | long_options, NULL); | |
3348 | if (c == -1) { | |
3349 | break; | |
3350 | } | |
3351 | ||
3352 | switch (c) { | |
3353 | case 'h': | |
3354 | case '?': | |
3355 | help(); | |
3356 | break; | |
3357 | case 'o': | |
3358 | if (!is_valid_option_list(optarg)) { | |
3359 | error_report("Invalid option list: %s", optarg); | |
3360 | ret = -1; | |
3361 | goto out_no_progress; | |
3362 | } | |
3363 | if (!options) { | |
3364 | options = g_strdup(optarg); | |
3365 | } else { | |
3366 | char *old_options = options; | |
3367 | options = g_strdup_printf("%s,%s", options, optarg); | |
3368 | g_free(old_options); | |
3369 | } | |
3370 | break; | |
3371 | case 'f': | |
3372 | fmt = optarg; | |
3373 | break; | |
3374 | case 't': | |
3375 | cache = optarg; | |
3376 | break; | |
3377 | case 'p': | |
3378 | progress = true; | |
3379 | break; | |
3380 | case 'q': | |
3381 | quiet = true; | |
3382 | break; | |
3383 | case OPTION_OBJECT: | |
3384 | opts = qemu_opts_parse_noisily(&qemu_object_opts, | |
3385 | optarg, true); | |
3386 | if (!opts) { | |
3387 | ret = -1; | |
3388 | goto out_no_progress; | |
3389 | } | |
3390 | break; | |
3391 | case OPTION_IMAGE_OPTS: | |
3392 | image_opts = true; | |
3393 | break; | |
3394 | } | |
3395 | } | |
3396 | ||
3397 | if (!options) { | |
3398 | error_exit("Must specify options (-o)"); | |
3399 | } | |
3400 | ||
3401 | if (qemu_opts_foreach(&qemu_object_opts, | |
3402 | user_creatable_add_opts_foreach, | |
3403 | NULL, NULL)) { | |
3404 | ret = -1; | |
3405 | goto out_no_progress; | |
3406 | } | |
3407 | ||
3408 | if (quiet) { | |
3409 | progress = false; | |
3410 | } | |
3411 | qemu_progress_init(progress, 1.0); | |
3412 | ||
3413 | filename = (optind == argc - 1) ? argv[argc - 1] : NULL; | |
3414 | if (fmt && has_help_option(options)) { | |
3415 | /* If a format is explicitly specified (and possibly no filename is | |
3416 | * given), print option help here */ | |
3417 | ret = print_block_option_help(filename, fmt); | |
3418 | goto out; | |
3419 | } | |
3420 | ||
3421 | if (optind != argc - 1) { | |
3422 | error_report("Expecting one image file name"); | |
3423 | ret = -1; | |
3424 | goto out; | |
3425 | } | |
3426 | ||
3427 | flags = BDRV_O_RDWR; | |
3428 | ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); | |
3429 | if (ret < 0) { | |
3430 | error_report("Invalid cache option: %s", cache); | |
3431 | goto out; | |
3432 | } | |
3433 | ||
3434 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
3435 | if (!blk) { | |
3436 | ret = -1; | |
3437 | goto out; | |
3438 | } | |
3439 | bs = blk_bs(blk); | |
3440 | ||
3441 | fmt = bs->drv->format_name; | |
3442 | ||
3443 | if (has_help_option(options)) { | |
3444 | /* If the format was auto-detected, print option help here */ | |
3445 | ret = print_block_option_help(filename, fmt); | |
3446 | goto out; | |
3447 | } | |
3448 | ||
3449 | if (!bs->drv->create_opts) { | |
3450 | error_report("Format driver '%s' does not support any options to amend", | |
3451 | fmt); | |
3452 | ret = -1; | |
3453 | goto out; | |
3454 | } | |
3455 | ||
3456 | create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); | |
3457 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
3458 | qemu_opts_do_parse(opts, options, NULL, &err); | |
3459 | if (err) { | |
3460 | error_report_err(err); | |
3461 | ret = -1; | |
3462 | goto out; | |
3463 | } | |
3464 | ||
3465 | /* In case the driver does not call amend_status_cb() */ | |
3466 | qemu_progress_print(0.f, 0); | |
3467 | ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); | |
3468 | qemu_progress_print(100.f, 0); | |
3469 | if (ret < 0) { | |
3470 | error_report("Error while amending options: %s", strerror(-ret)); | |
3471 | goto out; | |
3472 | } | |
3473 | ||
3474 | out: | |
3475 | qemu_progress_end(); | |
3476 | ||
3477 | out_no_progress: | |
3478 | blk_unref(blk); | |
3479 | qemu_opts_del(opts); | |
3480 | qemu_opts_free(create_opts); | |
3481 | g_free(options); | |
3482 | ||
3483 | if (ret) { | |
3484 | return 1; | |
3485 | } | |
3486 | return 0; | |
3487 | } | |
3488 | ||
3489 | typedef struct BenchData { | |
3490 | BlockBackend *blk; | |
3491 | uint64_t image_size; | |
3492 | bool write; | |
3493 | int bufsize; | |
3494 | int step; | |
3495 | int nrreq; | |
3496 | int n; | |
3497 | int flush_interval; | |
3498 | bool drain_on_flush; | |
3499 | uint8_t *buf; | |
3500 | QEMUIOVector *qiov; | |
3501 | ||
3502 | int in_flight; | |
3503 | bool in_flush; | |
3504 | uint64_t offset; | |
3505 | } BenchData; | |
3506 | ||
3507 | static void bench_undrained_flush_cb(void *opaque, int ret) | |
3508 | { | |
3509 | if (ret < 0) { | |
3510 | error_report("Failed flush request: %s", strerror(-ret)); | |
3511 | exit(EXIT_FAILURE); | |
3512 | } | |
3513 | } | |
3514 | ||
3515 | static void bench_cb(void *opaque, int ret) | |
3516 | { | |
3517 | BenchData *b = opaque; | |
3518 | BlockAIOCB *acb; | |
3519 | ||
3520 | if (ret < 0) { | |
3521 | error_report("Failed request: %s", strerror(-ret)); | |
3522 | exit(EXIT_FAILURE); | |
3523 | } | |
3524 | ||
3525 | if (b->in_flush) { | |
3526 | /* Just finished a flush with drained queue: Start next requests */ | |
3527 | assert(b->in_flight == 0); | |
3528 | b->in_flush = false; | |
3529 | } else if (b->in_flight > 0) { | |
3530 | int remaining = b->n - b->in_flight; | |
3531 | ||
3532 | b->n--; | |
3533 | b->in_flight--; | |
3534 | ||
3535 | /* Time for flush? Drain queue if requested, then flush */ | |
3536 | if (b->flush_interval && remaining % b->flush_interval == 0) { | |
3537 | if (!b->in_flight || !b->drain_on_flush) { | |
3538 | BlockCompletionFunc *cb; | |
3539 | ||
3540 | if (b->drain_on_flush) { | |
3541 | b->in_flush = true; | |
3542 | cb = bench_cb; | |
3543 | } else { | |
3544 | cb = bench_undrained_flush_cb; | |
3545 | } | |
3546 | ||
3547 | acb = blk_aio_flush(b->blk, cb, b); | |
3548 | if (!acb) { | |
3549 | error_report("Failed to issue flush request"); | |
3550 | exit(EXIT_FAILURE); | |
3551 | } | |
3552 | } | |
3553 | if (b->drain_on_flush) { | |
3554 | return; | |
3555 | } | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | while (b->n > b->in_flight && b->in_flight < b->nrreq) { | |
3560 | int64_t offset = b->offset; | |
3561 | /* blk_aio_* might look for completed I/Os and kick bench_cb | |
3562 | * again, so make sure this operation is counted by in_flight | |
3563 | * and b->offset is ready for the next submission. | |
3564 | */ | |
3565 | b->in_flight++; | |
3566 | b->offset += b->step; | |
3567 | b->offset %= b->image_size; | |
3568 | if (b->write) { | |
3569 | acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b); | |
3570 | } else { | |
3571 | acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b); | |
3572 | } | |
3573 | if (!acb) { | |
3574 | error_report("Failed to issue request"); | |
3575 | exit(EXIT_FAILURE); | |
3576 | } | |
3577 | } | |
3578 | } | |
3579 | ||
3580 | static int img_bench(int argc, char **argv) | |
3581 | { | |
3582 | int c, ret = 0; | |
3583 | const char *fmt = NULL, *filename; | |
3584 | bool quiet = false; | |
3585 | bool image_opts = false; | |
3586 | bool is_write = false; | |
3587 | int count = 75000; | |
3588 | int depth = 64; | |
3589 | int64_t offset = 0; | |
3590 | size_t bufsize = 4096; | |
3591 | int pattern = 0; | |
3592 | size_t step = 0; | |
3593 | int flush_interval = 0; | |
3594 | bool drain_on_flush = true; | |
3595 | int64_t image_size; | |
3596 | BlockBackend *blk = NULL; | |
3597 | BenchData data = {}; | |
3598 | int flags = 0; | |
3599 | bool writethrough = false; | |
3600 | struct timeval t1, t2; | |
3601 | int i; | |
3602 | ||
3603 | for (;;) { | |
3604 | static const struct option long_options[] = { | |
3605 | {"help", no_argument, 0, 'h'}, | |
3606 | {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, | |
3607 | {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3608 | {"pattern", required_argument, 0, OPTION_PATTERN}, | |
3609 | {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, | |
3610 | {0, 0, 0, 0} | |
3611 | }; | |
3612 | c = getopt_long(argc, argv, "hc:d:f:no:qs:S:t:w", long_options, NULL); | |
3613 | if (c == -1) { | |
3614 | break; | |
3615 | } | |
3616 | ||
3617 | switch (c) { | |
3618 | case 'h': | |
3619 | case '?': | |
3620 | help(); | |
3621 | break; | |
3622 | case 'c': | |
3623 | { | |
3624 | char *end; | |
3625 | errno = 0; | |
3626 | count = strtoul(optarg, &end, 0); | |
3627 | if (errno || *end || count > INT_MAX) { | |
3628 | error_report("Invalid request count specified"); | |
3629 | return 1; | |
3630 | } | |
3631 | break; | |
3632 | } | |
3633 | case 'd': | |
3634 | { | |
3635 | char *end; | |
3636 | errno = 0; | |
3637 | depth = strtoul(optarg, &end, 0); | |
3638 | if (errno || *end || depth > INT_MAX) { | |
3639 | error_report("Invalid queue depth specified"); | |
3640 | return 1; | |
3641 | } | |
3642 | break; | |
3643 | } | |
3644 | case 'f': | |
3645 | fmt = optarg; | |
3646 | break; | |
3647 | case 'n': | |
3648 | flags |= BDRV_O_NATIVE_AIO; | |
3649 | break; | |
3650 | case 'o': | |
3651 | { | |
3652 | char *end; | |
3653 | errno = 0; | |
3654 | offset = qemu_strtosz_suffix(optarg, &end, | |
3655 | QEMU_STRTOSZ_DEFSUFFIX_B); | |
3656 | if (offset < 0|| *end) { | |
3657 | error_report("Invalid offset specified"); | |
3658 | return 1; | |
3659 | } | |
3660 | break; | |
3661 | } | |
3662 | break; | |
3663 | case 'q': | |
3664 | quiet = true; | |
3665 | break; | |
3666 | case 's': | |
3667 | { | |
3668 | int64_t sval; | |
3669 | char *end; | |
3670 | ||
3671 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3672 | if (sval < 0 || sval > INT_MAX || *end) { | |
3673 | error_report("Invalid buffer size specified"); | |
3674 | return 1; | |
3675 | } | |
3676 | ||
3677 | bufsize = sval; | |
3678 | break; | |
3679 | } | |
3680 | case 'S': | |
3681 | { | |
3682 | int64_t sval; | |
3683 | char *end; | |
3684 | ||
3685 | sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3686 | if (sval < 0 || sval > INT_MAX || *end) { | |
3687 | error_report("Invalid step size specified"); | |
3688 | return 1; | |
3689 | } | |
3690 | ||
3691 | step = sval; | |
3692 | break; | |
3693 | } | |
3694 | case 't': | |
3695 | ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); | |
3696 | if (ret < 0) { | |
3697 | error_report("Invalid cache mode"); | |
3698 | ret = -1; | |
3699 | goto out; | |
3700 | } | |
3701 | break; | |
3702 | case 'w': | |
3703 | flags |= BDRV_O_RDWR; | |
3704 | is_write = true; | |
3705 | break; | |
3706 | case OPTION_PATTERN: | |
3707 | { | |
3708 | char *end; | |
3709 | errno = 0; | |
3710 | pattern = strtoul(optarg, &end, 0); | |
3711 | if (errno || *end || pattern > 0xff) { | |
3712 | error_report("Invalid pattern byte specified"); | |
3713 | return 1; | |
3714 | } | |
3715 | break; | |
3716 | } | |
3717 | case OPTION_FLUSH_INTERVAL: | |
3718 | { | |
3719 | char *end; | |
3720 | errno = 0; | |
3721 | flush_interval = strtoul(optarg, &end, 0); | |
3722 | if (errno || *end || flush_interval > INT_MAX) { | |
3723 | error_report("Invalid flush interval specified"); | |
3724 | return 1; | |
3725 | } | |
3726 | break; | |
3727 | } | |
3728 | case OPTION_NO_DRAIN: | |
3729 | drain_on_flush = false; | |
3730 | break; | |
3731 | case OPTION_IMAGE_OPTS: | |
3732 | image_opts = true; | |
3733 | break; | |
3734 | } | |
3735 | } | |
3736 | ||
3737 | if (optind != argc - 1) { | |
3738 | error_exit("Expecting one image file name"); | |
3739 | } | |
3740 | filename = argv[argc - 1]; | |
3741 | ||
3742 | if (!is_write && flush_interval) { | |
3743 | error_report("--flush-interval is only available in write tests"); | |
3744 | ret = -1; | |
3745 | goto out; | |
3746 | } | |
3747 | if (flush_interval && flush_interval < depth) { | |
3748 | error_report("Flush interval can't be smaller than depth"); | |
3749 | ret = -1; | |
3750 | goto out; | |
3751 | } | |
3752 | ||
3753 | blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); | |
3754 | if (!blk) { | |
3755 | ret = -1; | |
3756 | goto out; | |
3757 | } | |
3758 | ||
3759 | image_size = blk_getlength(blk); | |
3760 | if (image_size < 0) { | |
3761 | ret = image_size; | |
3762 | goto out; | |
3763 | } | |
3764 | ||
3765 | data = (BenchData) { | |
3766 | .blk = blk, | |
3767 | .image_size = image_size, | |
3768 | .bufsize = bufsize, | |
3769 | .step = step ?: bufsize, | |
3770 | .nrreq = depth, | |
3771 | .n = count, | |
3772 | .offset = offset, | |
3773 | .write = is_write, | |
3774 | .flush_interval = flush_interval, | |
3775 | .drain_on_flush = drain_on_flush, | |
3776 | }; | |
3777 | printf("Sending %d %s requests, %d bytes each, %d in parallel " | |
3778 | "(starting at offset %" PRId64 ", step size %d)\n", | |
3779 | data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, | |
3780 | data.offset, data.step); | |
3781 | if (flush_interval) { | |
3782 | printf("Sending flush every %d requests\n", flush_interval); | |
3783 | } | |
3784 | ||
3785 | data.buf = blk_blockalign(blk, data.nrreq * data.bufsize); | |
3786 | memset(data.buf, pattern, data.nrreq * data.bufsize); | |
3787 | ||
3788 | data.qiov = g_new(QEMUIOVector, data.nrreq); | |
3789 | for (i = 0; i < data.nrreq; i++) { | |
3790 | qemu_iovec_init(&data.qiov[i], 1); | |
3791 | qemu_iovec_add(&data.qiov[i], | |
3792 | data.buf + i * data.bufsize, data.bufsize); | |
3793 | } | |
3794 | ||
3795 | gettimeofday(&t1, NULL); | |
3796 | bench_cb(&data, 0); | |
3797 | ||
3798 | while (data.n > 0) { | |
3799 | main_loop_wait(false); | |
3800 | } | |
3801 | gettimeofday(&t2, NULL); | |
3802 | ||
3803 | printf("Run completed in %3.3f seconds.\n", | |
3804 | (t2.tv_sec - t1.tv_sec) | |
3805 | + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); | |
3806 | ||
3807 | out: | |
3808 | qemu_vfree(data.buf); | |
3809 | blk_unref(blk); | |
3810 | ||
3811 | if (ret) { | |
3812 | return 1; | |
3813 | } | |
3814 | return 0; | |
3815 | } | |
3816 | ||
3817 | #define C_BS 01 | |
3818 | #define C_COUNT 02 | |
3819 | #define C_IF 04 | |
3820 | #define C_OF 010 | |
3821 | #define C_SKIP 020 | |
3822 | ||
3823 | struct DdInfo { | |
3824 | unsigned int flags; | |
3825 | int64_t count; | |
3826 | }; | |
3827 | ||
3828 | struct DdIo { | |
3829 | int bsz; /* Block size */ | |
3830 | char *filename; | |
3831 | uint8_t *buf; | |
3832 | int64_t offset; | |
3833 | }; | |
3834 | ||
3835 | struct DdOpts { | |
3836 | const char *name; | |
3837 | int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *); | |
3838 | unsigned int flag; | |
3839 | }; | |
3840 | ||
3841 | static int img_dd_bs(const char *arg, | |
3842 | struct DdIo *in, struct DdIo *out, | |
3843 | struct DdInfo *dd) | |
3844 | { | |
3845 | char *end; | |
3846 | int64_t res; | |
3847 | ||
3848 | res = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3849 | ||
3850 | if (res <= 0 || res > INT_MAX || *end) { | |
3851 | error_report("invalid number: '%s'", arg); | |
3852 | return 1; | |
3853 | } | |
3854 | in->bsz = out->bsz = res; | |
3855 | ||
3856 | return 0; | |
3857 | } | |
3858 | ||
3859 | static int img_dd_count(const char *arg, | |
3860 | struct DdIo *in, struct DdIo *out, | |
3861 | struct DdInfo *dd) | |
3862 | { | |
3863 | char *end; | |
3864 | ||
3865 | dd->count = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3866 | ||
3867 | if (dd->count < 0 || *end) { | |
3868 | error_report("invalid number: '%s'", arg); | |
3869 | return 1; | |
3870 | } | |
3871 | ||
3872 | return 0; | |
3873 | } | |
3874 | ||
3875 | static int img_dd_if(const char *arg, | |
3876 | struct DdIo *in, struct DdIo *out, | |
3877 | struct DdInfo *dd) | |
3878 | { | |
3879 | in->filename = g_strdup(arg); | |
3880 | ||
3881 | return 0; | |
3882 | } | |
3883 | ||
3884 | static int img_dd_of(const char *arg, | |
3885 | struct DdIo *in, struct DdIo *out, | |
3886 | struct DdInfo *dd) | |
3887 | { | |
3888 | out->filename = g_strdup(arg); | |
3889 | ||
3890 | return 0; | |
3891 | } | |
3892 | ||
3893 | static int img_dd_skip(const char *arg, | |
3894 | struct DdIo *in, struct DdIo *out, | |
3895 | struct DdInfo *dd) | |
3896 | { | |
3897 | char *end; | |
3898 | ||
3899 | in->offset = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); | |
3900 | ||
3901 | if (in->offset < 0 || *end) { | |
3902 | error_report("invalid number: '%s'", arg); | |
3903 | return 1; | |
3904 | } | |
3905 | ||
3906 | return 0; | |
3907 | } | |
3908 | ||
3909 | static int img_dd(int argc, char **argv) | |
3910 | { | |
3911 | int ret = 0; | |
3912 | char *arg = NULL; | |
3913 | char *tmp; | |
3914 | BlockDriver *drv = NULL, *proto_drv = NULL; | |
3915 | BlockBackend *blk1 = NULL, *blk2 = NULL; | |
3916 | QemuOpts *opts = NULL; | |
3917 | QemuOptsList *create_opts = NULL; | |
3918 | Error *local_err = NULL; | |
3919 | bool image_opts = false; | |
3920 | int c, i; | |
3921 | const char *out_fmt = "raw"; | |
3922 | const char *fmt = NULL; | |
3923 | int64_t size = 0; | |
3924 | int64_t block_count = 0, out_pos, in_pos; | |
3925 | struct DdInfo dd = { | |
3926 | .flags = 0, | |
3927 | .count = 0, | |
3928 | }; | |
3929 | struct DdIo in = { | |
3930 | .bsz = 512, /* Block size is by default 512 bytes */ | |
3931 | .filename = NULL, | |
3932 | .buf = NULL, | |
3933 | .offset = 0 | |
3934 | }; | |
3935 | struct DdIo out = { | |
3936 | .bsz = 512, | |
3937 | .filename = NULL, | |
3938 | .buf = NULL, | |
3939 | .offset = 0 | |
3940 | }; | |
3941 | ||
3942 | const struct DdOpts options[] = { | |
3943 | { "bs", img_dd_bs, C_BS }, | |
3944 | { "count", img_dd_count, C_COUNT }, | |
3945 | { "if", img_dd_if, C_IF }, | |
3946 | { "of", img_dd_of, C_OF }, | |
3947 | { "skip", img_dd_skip, C_SKIP }, | |
3948 | { NULL, NULL, 0 } | |
3949 | }; | |
3950 | const struct option long_options[] = { | |
3951 | { "help", no_argument, 0, 'h'}, | |
3952 | { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, | |
3953 | { 0, 0, 0, 0 } | |
3954 | }; | |
3955 | ||
3956 | while ((c = getopt_long(argc, argv, "hf:O:", long_options, NULL))) { | |
3957 | if (c == EOF) { | |
3958 | break; | |
3959 | } | |
3960 | switch (c) { | |
3961 | case 'O': | |
3962 | out_fmt = optarg; | |
3963 | break; | |
3964 | case 'f': | |
3965 | fmt = optarg; | |
3966 | break; | |
3967 | case '?': | |
3968 | error_report("Try 'qemu-img --help' for more information."); | |
3969 | ret = -1; | |
3970 | goto out; | |
3971 | case 'h': | |
3972 | help(); | |
3973 | break; | |
3974 | case OPTION_IMAGE_OPTS: | |
3975 | image_opts = true; | |
3976 | break; | |
3977 | } | |
3978 | } | |
3979 | ||
3980 | for (i = optind; i < argc; i++) { | |
3981 | int j; | |
3982 | arg = g_strdup(argv[i]); | |
3983 | ||
3984 | tmp = strchr(arg, '='); | |
3985 | if (tmp == NULL) { | |
3986 | error_report("unrecognized operand %s", arg); | |
3987 | ret = -1; | |
3988 | goto out; | |
3989 | } | |
3990 | ||
3991 | *tmp++ = '\0'; | |
3992 | ||
3993 | for (j = 0; options[j].name != NULL; j++) { | |
3994 | if (!strcmp(arg, options[j].name)) { | |
3995 | break; | |
3996 | } | |
3997 | } | |
3998 | if (options[j].name == NULL) { | |
3999 | error_report("unrecognized operand %s", arg); | |
4000 | ret = -1; | |
4001 | goto out; | |
4002 | } | |
4003 | ||
4004 | if (options[j].f(tmp, &in, &out, &dd) != 0) { | |
4005 | ret = -1; | |
4006 | goto out; | |
4007 | } | |
4008 | dd.flags |= options[j].flag; | |
4009 | g_free(arg); | |
4010 | arg = NULL; | |
4011 | } | |
4012 | ||
4013 | if (!(dd.flags & C_IF && dd.flags & C_OF)) { | |
4014 | error_report("Must specify both input and output files"); | |
4015 | ret = -1; | |
4016 | goto out; | |
4017 | } | |
4018 | blk1 = img_open(image_opts, in.filename, fmt, 0, false, false); | |
4019 | ||
4020 | if (!blk1) { | |
4021 | ret = -1; | |
4022 | goto out; | |
4023 | } | |
4024 | ||
4025 | drv = bdrv_find_format(out_fmt); | |
4026 | if (!drv) { | |
4027 | error_report("Unknown file format"); | |
4028 | ret = -1; | |
4029 | goto out; | |
4030 | } | |
4031 | proto_drv = bdrv_find_protocol(out.filename, true, &local_err); | |
4032 | ||
4033 | if (!proto_drv) { | |
4034 | error_report_err(local_err); | |
4035 | ret = -1; | |
4036 | goto out; | |
4037 | } | |
4038 | if (!drv->create_opts) { | |
4039 | error_report("Format driver '%s' does not support image creation", | |
4040 | drv->format_name); | |
4041 | ret = -1; | |
4042 | goto out; | |
4043 | } | |
4044 | if (!proto_drv->create_opts) { | |
4045 | error_report("Protocol driver '%s' does not support image creation", | |
4046 | proto_drv->format_name); | |
4047 | ret = -1; | |
4048 | goto out; | |
4049 | } | |
4050 | create_opts = qemu_opts_append(create_opts, drv->create_opts); | |
4051 | create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); | |
4052 | ||
4053 | opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); | |
4054 | ||
4055 | size = blk_getlength(blk1); | |
4056 | if (size < 0) { | |
4057 | error_report("Failed to get size for '%s'", in.filename); | |
4058 | ret = -1; | |
4059 | goto out; | |
4060 | } | |
4061 | ||
4062 | if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz && | |
4063 | dd.count * in.bsz < size) { | |
4064 | size = dd.count * in.bsz; | |
4065 | } | |
4066 | ||
4067 | /* Overflow means the specified offset is beyond input image's size */ | |
4068 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
4069 | size < in.bsz * in.offset)) { | |
4070 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort); | |
4071 | } else { | |
4072 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, | |
4073 | size - in.bsz * in.offset, &error_abort); | |
4074 | } | |
4075 | ||
4076 | ret = bdrv_create(drv, out.filename, opts, &local_err); | |
4077 | if (ret < 0) { | |
4078 | error_reportf_err(local_err, | |
4079 | "%s: error while creating output image: ", | |
4080 | out.filename); | |
4081 | ret = -1; | |
4082 | goto out; | |
4083 | } | |
4084 | ||
4085 | blk2 = img_open(image_opts, out.filename, out_fmt, BDRV_O_RDWR, | |
4086 | false, false); | |
4087 | ||
4088 | if (!blk2) { | |
4089 | ret = -1; | |
4090 | goto out; | |
4091 | } | |
4092 | ||
4093 | if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz || | |
4094 | size < in.offset * in.bsz)) { | |
4095 | /* We give a warning if the skip option is bigger than the input | |
4096 | * size and create an empty output disk image (i.e. like dd(1)). | |
4097 | */ | |
4098 | error_report("%s: cannot skip to specified offset", in.filename); | |
4099 | in_pos = size; | |
4100 | } else { | |
4101 | in_pos = in.offset * in.bsz; | |
4102 | } | |
4103 | ||
4104 | in.buf = g_new(uint8_t, in.bsz); | |
4105 | ||
4106 | for (out_pos = 0; in_pos < size; block_count++) { | |
4107 | int in_ret, out_ret; | |
4108 | ||
4109 | if (in_pos + in.bsz > size) { | |
4110 | in_ret = blk_pread(blk1, in_pos, in.buf, size - in_pos); | |
4111 | } else { | |
4112 | in_ret = blk_pread(blk1, in_pos, in.buf, in.bsz); | |
4113 | } | |
4114 | if (in_ret < 0) { | |
4115 | error_report("error while reading from input image file: %s", | |
4116 | strerror(-in_ret)); | |
4117 | ret = -1; | |
4118 | goto out; | |
4119 | } | |
4120 | in_pos += in_ret; | |
4121 | ||
4122 | out_ret = blk_pwrite(blk2, out_pos, in.buf, in_ret, 0); | |
4123 | ||
4124 | if (out_ret < 0) { | |
4125 | error_report("error while writing to output image file: %s", | |
4126 | strerror(-out_ret)); | |
4127 | ret = -1; | |
4128 | goto out; | |
4129 | } | |
4130 | out_pos += out_ret; | |
4131 | } | |
4132 | ||
4133 | out: | |
4134 | g_free(arg); | |
4135 | qemu_opts_del(opts); | |
4136 | qemu_opts_free(create_opts); | |
4137 | blk_unref(blk1); | |
4138 | blk_unref(blk2); | |
4139 | g_free(in.filename); | |
4140 | g_free(out.filename); | |
4141 | g_free(in.buf); | |
4142 | g_free(out.buf); | |
4143 | ||
4144 | if (ret) { | |
4145 | return 1; | |
4146 | } | |
4147 | return 0; | |
4148 | } | |
4149 | ||
4150 | ||
4151 | static const img_cmd_t img_cmds[] = { | |
4152 | #define DEF(option, callback, arg_string) \ | |
4153 | { option, callback }, | |
4154 | #include "qemu-img-cmds.h" | |
4155 | #undef DEF | |
4156 | #undef GEN_DOCS | |
4157 | { NULL, NULL, }, | |
4158 | }; | |
4159 | ||
4160 | int main(int argc, char **argv) | |
4161 | { | |
4162 | const img_cmd_t *cmd; | |
4163 | const char *cmdname; | |
4164 | Error *local_error = NULL; | |
4165 | char *trace_file = NULL; | |
4166 | int c; | |
4167 | static const struct option long_options[] = { | |
4168 | {"help", no_argument, 0, 'h'}, | |
4169 | {"version", no_argument, 0, 'V'}, | |
4170 | {"trace", required_argument, NULL, 'T'}, | |
4171 | {0, 0, 0, 0} | |
4172 | }; | |
4173 | ||
4174 | #ifdef CONFIG_POSIX | |
4175 | signal(SIGPIPE, SIG_IGN); | |
4176 | #endif | |
4177 | ||
4178 | module_call_init(MODULE_INIT_TRACE); | |
4179 | error_set_progname(argv[0]); | |
4180 | qemu_init_exec_dir(argv[0]); | |
4181 | ||
4182 | if (qemu_init_main_loop(&local_error)) { | |
4183 | error_report_err(local_error); | |
4184 | exit(EXIT_FAILURE); | |
4185 | } | |
4186 | ||
4187 | qcrypto_init(&error_fatal); | |
4188 | ||
4189 | module_call_init(MODULE_INIT_QOM); | |
4190 | bdrv_init(); | |
4191 | if (argc < 2) { | |
4192 | error_exit("Not enough arguments"); | |
4193 | } | |
4194 | ||
4195 | qemu_add_opts(&qemu_object_opts); | |
4196 | qemu_add_opts(&qemu_source_opts); | |
4197 | qemu_add_opts(&qemu_trace_opts); | |
4198 | ||
4199 | while ((c = getopt_long(argc, argv, "+hVT:", long_options, NULL)) != -1) { | |
4200 | switch (c) { | |
4201 | case 'h': | |
4202 | help(); | |
4203 | return 0; | |
4204 | case 'V': | |
4205 | printf(QEMU_IMG_VERSION); | |
4206 | return 0; | |
4207 | case 'T': | |
4208 | g_free(trace_file); | |
4209 | trace_file = trace_opt_parse(optarg); | |
4210 | break; | |
4211 | } | |
4212 | } | |
4213 | ||
4214 | cmdname = argv[optind]; | |
4215 | ||
4216 | /* reset getopt_long scanning */ | |
4217 | argc -= optind; | |
4218 | if (argc < 1) { | |
4219 | return 0; | |
4220 | } | |
4221 | argv += optind; | |
4222 | optind = 0; | |
4223 | ||
4224 | if (!trace_init_backends()) { | |
4225 | exit(1); | |
4226 | } | |
4227 | trace_init_file(trace_file); | |
4228 | qemu_set_log(LOG_TRACE); | |
4229 | ||
4230 | /* find the command */ | |
4231 | for (cmd = img_cmds; cmd->name != NULL; cmd++) { | |
4232 | if (!strcmp(cmdname, cmd->name)) { | |
4233 | return cmd->handler(argc, argv); | |
4234 | } | |
4235 | } | |
4236 | ||
4237 | /* not found */ | |
4238 | error_exit("Command not found: %s", cmdname); | |
4239 | } |